Viewing: mdt_handler.c
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2010, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*
* Lustre Metadata Target (mdt) request handler
*
* Author: Peter Braam <braam@clusterfs.com>
* Author: Andreas Dilger <adilger@clusterfs.com>
* Author: Phil Schwan <phil@clusterfs.com>
* Author: Mike Shaver <shaver@clusterfs.com>
* Author: Nikita Danilov <nikita@clusterfs.com>
* Author: Huang Hua <huanghua@clusterfs.com>
* Author: Yury Umanets <umka@clusterfs.com>
*/
#define DEBUG_SUBSYSTEM S_MDS
#include <linux/module.h>
#include <linux/pagemap.h>
#include <dt_object.h>
#include <lustre_acl.h>
#include <lustre_export.h>
#include <uapi/linux/lustre/lustre_ioctl.h>
#include <lustre_lfsck.h>
#include <lustre_log.h>
#include <lustre_nodemap.h>
#include <lustre_mds.h>
#include <uapi/linux/lustre/lustre_param.h>
#include <lustre_quota.h>
#include <lustre_swab.h>
#include <lustre_lmv.h>
#include <obd.h>
#include <obd_support.h>
#include <lustre_barrier.h>
#include <obd_cksum.h>
#include <llog_swab.h>
#include <lustre_crypto.h>
#include "mdt_internal.h"
#if OBD_OCD_VERSION(3, 0, 53, 0) > LUSTRE_VERSION_CODE
static int mdt_max_mod_rpcs_per_client_set(const char *val,
const struct kernel_param *kp)
{
unsigned int num;
int rc;
rc = kstrtouint(val, 0, &num);
if (rc < 0)
return rc;
if (num < 1 || num > OBD_MAX_RIF_MAX)
return -EINVAL;
CWARN("max_mod_rpcs_per_client is deprecated, set mdt.*.max_mod_rpcs_in_flight parameter instead\n");
max_mod_rpcs_per_client = num;
return 0;
}
static const struct kernel_param_ops
param_ops_max_mod_rpcs_per_client = {
.set = mdt_max_mod_rpcs_per_client_set,
.get = param_get_uint,
};
module_param_cb(max_mod_rpcs_per_client,
¶m_ops_max_mod_rpcs_per_client,
&max_mod_rpcs_per_client, 0644);
MODULE_PARM_DESC(max_mod_rpcs_per_client,
"maximum number of modify RPCs in flight allowed per client (Deprecated)");
#endif
static struct mdt_device *mdt_dev(struct lu_device *d);
static const struct lu_object_operations mdt_obj_ops;
/* Slab for MDT object allocation */
static struct kmem_cache *mdt_object_kmem;
/* For HSM restore handles */
struct kmem_cache *mdt_hsm_cdt_kmem;
/* For HSM request handles */
struct kmem_cache *mdt_hsm_car_kmem;
static struct lu_kmem_descr mdt_caches[] = {
{
.ckd_cache = &mdt_object_kmem,
.ckd_name = "mdt_obj",
.ckd_size = sizeof(struct mdt_object)
},
{
.ckd_cache = &mdt_hsm_cdt_kmem,
.ckd_name = "mdt_cdt_restore_handle",
.ckd_size = sizeof(struct cdt_restore_handle)
},
{
.ckd_cache = &mdt_hsm_car_kmem,
.ckd_name = "mdt_cdt_agent_req",
.ckd_size = sizeof(struct cdt_agent_req)
},
{
.ckd_cache = NULL
}
};
__u64 mdt_get_disposition(struct ldlm_reply *rep, __u64 op_flag)
{
if (!rep)
return 0;
return rep->lock_policy_res1 & op_flag;
}
void mdt_clear_disposition(struct mdt_thread_info *info,
struct ldlm_reply *rep, __u64 op_flag)
{
if (info) {
info->mti_opdata &= ~op_flag;
tgt_opdata_clear(info->mti_env, op_flag);
}
if (rep)
rep->lock_policy_res1 &= ~op_flag;
}
void mdt_set_disposition(struct mdt_thread_info *info,
struct ldlm_reply *rep, __u64 op_flag)
{
if (info) {
info->mti_opdata |= op_flag;
tgt_opdata_set(info->mti_env, op_flag);
}
if (rep)
rep->lock_policy_res1 |= op_flag;
}
/* assert lock is unlocked before reuse */
static inline void mdt_lock_handle_assert(struct mdt_lock_handle *lh)
{
LASSERT(!lustre_handle_is_used(&lh->mlh_reg_lh));
LASSERT(!lustre_handle_is_used(&lh->mlh_pdo_lh));
LASSERT(!lustre_handle_is_used(&lh->mlh_rreg_lh));
}
void mdt_lock_reg_init(struct mdt_lock_handle *lh, enum ldlm_mode lm)
{
mdt_lock_handle_assert(lh);
lh->mlh_pdo_hash = 0;
lh->mlh_reg_mode = lm;
lh->mlh_rreg_mode = lm;
lh->mlh_type = MDT_REG_LOCK;
}
void mdt_lh_reg_init(struct mdt_lock_handle *lh, struct ldlm_lock *lock)
{
mdt_lock_reg_init(lh, lock->l_req_mode);
if (lock->l_req_mode == LCK_GROUP)
lh->mlh_gid = lock->l_policy_data.l_inodebits.li_gid;
}
void mdt_lock_pdo_init(struct mdt_lock_handle *lh, enum ldlm_mode lock_mode,
const struct lu_name *lname)
{
mdt_lock_handle_assert(lh);
lh->mlh_reg_mode = lock_mode;
lh->mlh_pdo_mode = LCK_MODE_MIN;
lh->mlh_rreg_mode = lock_mode;
lh->mlh_type = MDT_PDO_LOCK;
if (lu_name_is_valid(lname)) {
lh->mlh_pdo_hash = full_name_hash(NULL, lname->ln_name,
lname->ln_namelen);
/* XXX Workaround for LU-2856
*
* Zero is a valid return value of full_name_hash, but several
* users of mlh_pdo_hash assume a non-zero hash value. We
* therefore map zero onto an arbitrary, but consistent
* value (1) to avoid problems further down the road.
*/
if (unlikely(lh->mlh_pdo_hash == 0))
lh->mlh_pdo_hash = 1;
} else {
lh->mlh_pdo_hash = 0;
}
}
static void mdt_lock_pdo_mode(struct mdt_thread_info *info, struct mdt_object *o,
struct mdt_lock_handle *lh)
{
enum ldlm_mode mode;
ENTRY;
/*
* Any dir access needs couple of locks:
*
* 1) on part of dir we gonna take lookup/modify;
*
* 2) on whole dir to protect it from concurrent splitting and/or to
* flush client's cache for readdir().
*
* so, for a given mode and object this routine decides what lock mode
* to use for lock #2:
*
* 1) if caller's gonna lookup in dir then we need to protect dir from
* being splitted only - LCK_CR
*
* 2) if caller's gonna modify dir then we need to protect dir from
* being splitted and to flush cache - LCK_CW
*
* 3) if caller's gonna modify dir and that dir seems ready for
* splitting then we need to protect it from any type of access
* (lookup/modify/split) - LCK_EX --bzzz
*/
LASSERT(lh->mlh_reg_mode != LCK_MODE_MIN);
LASSERT(lh->mlh_pdo_mode == LCK_MODE_MIN);
/*
* Ask underlaying level its opinion about preferable PDO lock mode
* having access type passed as regular lock mode:
*
* - LCK_MODE_MIN means that lower layer does not want to specify lock
* mode;
*
* - LCK_NL means that no PDO lock should be taken. This is used in some
* cases. Say, for non-splittable directories no need to use PDO locks
* at all.
*/
mode = mdo_lock_mode(info->mti_env, mdt_object_child(o),
lh->mlh_reg_mode);
if (mode != LCK_MODE_MIN) {
lh->mlh_pdo_mode = mode;
} else {
/*
* Lower layer does not want to specify locking mode. We do it
* our selves. No special protection is needed, just flush
* client's cache on modification and allow concurrent
* mondification.
*/
switch (lh->mlh_reg_mode) {
case LCK_EX:
lh->mlh_pdo_mode = LCK_EX;
break;
case LCK_PR:
lh->mlh_pdo_mode = LCK_CR;
break;
case LCK_PW:
lh->mlh_pdo_mode = LCK_CW;
break;
default:
CERROR("Not expected lock type (0x%x)\n",
(int)lh->mlh_reg_mode);
LBUG();
}
}
LASSERT(lh->mlh_pdo_mode != LCK_MODE_MIN);
EXIT;
}
/**
* Check whether \a o is directory stripe object.
*
* \param[in] info thread environment
* \param[in] o MDT object
*
* \retval 1 is directory stripe.
* \retval 0 isn't directory stripe.
* \retval < 1 error code
*/
static int mdt_is_dir_stripe(struct mdt_thread_info *info,
struct mdt_object *o)
{
struct md_attr *ma = &info->mti_attr;
struct lmv_mds_md_v1 *lmv;
int rc;
rc = mdt_stripe_get(info, o, ma, XATTR_NAME_LMV);
if (rc < 0)
return rc;
if (!(ma->ma_valid & MA_LMV))
return 0;
lmv = &ma->ma_lmv->lmv_md_v1;
if (!lmv_is_sane2(lmv))
return -EBADF;
if (le32_to_cpu(lmv->lmv_magic) == LMV_MAGIC_STRIPE)
return 1;
return 0;
}
static int mdt_lookup_fileset(struct mdt_thread_info *info, const char *fileset,
struct lu_fid *fid)
{
struct mdt_device *mdt = info->mti_mdt;
struct lu_name *lname = &info->mti_name;
const char *start = fileset;
char *filename = info->mti_filename;
struct mdt_object *obj;
int rc = 0;
LASSERT(!info->mti_cross_ref);
/*
* We may want to allow this to mount a completely separate
* fileset from the MDT in the future, but keeping it to
* ROOT/ only for now avoid potential security issues.
*/
*fid = mdt->mdt_md_root_fid;
while (rc == 0 && start != NULL && *start != '\0') {
const char *s1 = start;
const char *s2;
while (*++s1 == '/')
;
s2 = s1;
while (*s2 != '/' && *s2 != '\0')
s2++;
if (s2 == s1)
break;
start = s2;
lname->ln_namelen = s2 - s1;
if (lname->ln_namelen > NAME_MAX) {
rc = -EINVAL;
break;
}
/* reject .. as a path component */
if (lname->ln_namelen == 2 && strncmp(s1, "..", 2) == 0) {
rc = -EINVAL;
break;
}
strncpy(filename, s1, lname->ln_namelen);
filename[lname->ln_namelen] = '\0';
lname->ln_name = filename;
obj = mdt_object_find(info->mti_env, mdt, fid);
if (IS_ERR(obj)) {
rc = PTR_ERR(obj);
break;
}
/* Only got the fid of this obj by name */
fid_zero(fid);
rc = mdo_lookup(info->mti_env, mdt_object_child(obj), lname,
fid, &info->mti_spec);
if (!rc && !S_ISDIR(lu_object_attr(&obj->mot_obj)))
rc = -ENOTDIR;
mdt_object_put(info->mti_env, obj);
}
return rc;
}
static int mdt_get_root(struct tgt_session_info *tsi)
{
struct mdt_thread_info *info = tsi2mdt_info(tsi);
struct mdt_device *mdt = info->mti_mdt;
struct obd_export *exp = info->mti_exp;
struct lu_nodemap *nodemap = NULL;
struct mdt_body *repbody;
char *fileset_mount = NULL;
char *fileset_buffer = NULL;
bool fileset_ro = false;
int fileset_buffer_size = 0;
int rc;
ENTRY;
rc = mdt_check_ucred(info);
if (rc)
GOTO(out, rc = err_serious(rc));
if (CFS_FAIL_CHECK(OBD_FAIL_MDS_GET_ROOT_PACK))
GOTO(out, rc = err_serious(-ENOMEM));
repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
if (req_capsule_get_size(info->mti_pill, &RMF_NAME, RCL_CLIENT) > 0) {
fileset_mount =
req_capsule_client_get(info->mti_pill, &RMF_NAME);
if (fileset_mount == NULL)
GOTO(out, rc = err_serious(-EFAULT));
}
/* refuse access if this nodemap is set to deny mounts */
nodemap = nodemap_get_from_exp(exp);
if (!IS_ERR_OR_NULL(nodemap)) {
if (nodemap->nmf_deny_mount) {
CDEBUG(D_SEC, "%s: denying client %s (at %s)\n",
exp->exp_obd->obd_name,
obd_uuid2str(&exp->exp_client_uuid),
obd_export_nid2str(exp));
GOTO(out, rc = err_serious(-EPERM));
}
/* get new root from nodemap if filesets are available */
rc = nodemap_fileset_get_root(exp->exp_target_data.ted_nodemap,
fileset_mount, &fileset_buffer,
&fileset_buffer_size,
&fileset_ro);
if (rc != 0)
GOTO(out, rc = err_serious(rc));
/* if fileset is read-only, the connection must be read-only.
* rw filesets are still allowed to be mounted as read-only.
*/
if (fileset_ro && !(exp->exp_connect_data.ocd_connect_flags &
OBD_CONNECT_RDONLY))
GOTO(out, rc = err_serious(-EROFS));
fileset_mount = fileset_buffer;
}
/* check that root exists */
if (fileset_mount && fileset_mount[0] != '\0') {
CDEBUG(D_INFO, "Getting fileset %s\n", fileset_mount);
rc = mdt_lookup_fileset(info, fileset_mount,
&repbody->mbo_fid1);
if (rc < 0)
GOTO(out, rc = err_serious(rc));
} else {
repbody->mbo_fid1 = mdt->mdt_md_root_fid;
}
exp->exp_root_fid = repbody->mbo_fid1;
repbody->mbo_valid |= OBD_MD_FLID;
EXIT;
out:
mdt_thread_info_fini(info);
OBD_FREE(fileset_buffer, fileset_buffer_size);
if (!IS_ERR_OR_NULL(nodemap))
nodemap_putref(nodemap);
return rc;
}
static int mdt_statfs(struct tgt_session_info *tsi)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
struct mdt_thread_info *info = tsi2mdt_info(tsi);
struct mdt_device *mdt = info->mti_mdt;
struct tg_grants_data *tgd = &mdt->mdt_lut.lut_tgd;
struct md_device *next = mdt->mdt_child;
struct ptlrpc_service_part *svcpt;
struct obd_statfs *osfs;
struct mdt_body *reqbody = NULL;
struct mdt_statfs_cache *msf;
ktime_t kstart = ktime_get();
int current_blockbits;
int rc;
timeout_t at_est;
ENTRY;
svcpt = req->rq_rqbd->rqbd_svcpt;
/* This will trigger a watchdog timeout */
at_est = obd_at_get(mdt->mdt_lu_dev.ld_obd, &svcpt->scp_at_estimate);
CFS_FAIL_TIMEOUT(OBD_FAIL_MDS_STATFS_LCW_SLEEP,
(MDT_SERVICE_WATCHDOG_FACTOR * at_est) + 1);
rc = mdt_check_ucred(info);
if (rc)
GOTO(out, rc = err_serious(rc));
if (CFS_FAIL_CHECK(OBD_FAIL_MDS_STATFS_PACK))
GOTO(out, rc = err_serious(-ENOMEM));
osfs = req_capsule_server_get(info->mti_pill, &RMF_OBD_STATFS);
if (!osfs)
GOTO(out, rc = -EPROTO);
if (mdt_is_sum_statfs_client(req->rq_export) &&
lustre_packed_msg_size(req->rq_reqmsg) ==
req_capsule_fmt_size(req->rq_reqmsg->lm_magic,
&RQF_MDS_STATFS_NEW, RCL_CLIENT)) {
req_capsule_extend(info->mti_pill, &RQF_MDS_STATFS_NEW);
reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
}
if (reqbody && reqbody->mbo_valid & OBD_MD_FLAGSTATFS)
msf = &mdt->mdt_sum_osfs;
else
msf = &mdt->mdt_osfs;
if (msf->msf_age + OBD_STATFS_CACHE_SECONDS <= ktime_get_seconds()) {
/** statfs data is too old, get up-to-date one */
if (reqbody && reqbody->mbo_valid & OBD_MD_FLAGSTATFS)
rc = next->md_ops->mdo_statfs(info->mti_env, next,
osfs);
else
rc = dt_statfs(info->mti_env, mdt->mdt_bottom, osfs);
if (rc)
GOTO(out, rc);
spin_lock(&mdt->mdt_lock);
msf->msf_osfs = *osfs;
msf->msf_age = ktime_get_seconds();
spin_unlock(&mdt->mdt_lock);
} else {
/** use cached statfs data */
spin_lock(&mdt->mdt_lock);
*osfs = msf->msf_osfs;
spin_unlock(&mdt->mdt_lock);
}
/* tgd_blockbit is recordsize bits set during mkfs.
* This once set does not change. However, 'zfs set'
* can be used to change the MDT blocksize. Instead
* of using cached value of 'tgd_blockbit' always
* calculate the blocksize bits which may have
* changed.
*/
current_blockbits = fls64(osfs->os_bsize) - 1;
/* Account for cached pages. its still racy and might be under-reporting
* if clients haven't announced their caches with brw recently
*/
CDEBUG(D_SUPER | D_CACHE, "blocks cached %llu granted %llu pending %llu free %llu avail %llu\n",
tgd->tgd_tot_dirty, tgd->tgd_tot_granted,
tgd->tgd_tot_pending,
osfs->os_bfree << current_blockbits,
osfs->os_bavail << current_blockbits);
osfs->os_bavail -= min_t(u64, osfs->os_bavail,
((tgd->tgd_tot_dirty + tgd->tgd_tot_pending +
osfs->os_bsize - 1) >> current_blockbits));
tgt_grant_sanity_check(mdt->mdt_lu_dev.ld_obd, __func__);
if (mdt->mdt_lut.lut_no_create)
osfs->os_state |= OS_STATFS_NOCREATE;
CDEBUG(D_CACHE, "%llu blocks: %llu free, %llu avail; "
"%llu objects: %llu free; state %x\n",
osfs->os_blocks, osfs->os_bfree, osfs->os_bavail,
osfs->os_files, osfs->os_ffree, osfs->os_state);
if (!exp_grant_param_supp(tsi->tsi_exp) &&
current_blockbits > COMPAT_BSIZE_SHIFT) {
/* clients which don't support OBD_CONNECT_GRANT_PARAM
* should not see a block size > page size, otherwise
* cl_lost_grant goes mad. Therefore, we emulate a 4KB (=2^12)
* block size which is the biggest block size known to work
* with all client's page size.
*/
osfs->os_blocks <<= current_blockbits - COMPAT_BSIZE_SHIFT;
osfs->os_bfree <<= current_blockbits - COMPAT_BSIZE_SHIFT;
osfs->os_bavail <<= current_blockbits - COMPAT_BSIZE_SHIFT;
osfs->os_bsize = 1 << COMPAT_BSIZE_SHIFT;
}
if (rc == 0)
mdt_counter_incr(req, LPROC_MDT_STATFS,
ktime_us_delta(ktime_get(), kstart));
out:
mdt_thread_info_fini(info);
RETURN(rc);
}
__u32 mdt_lmm_dom_entry_check(struct lov_mds_md *lmm, int *is_dom_only)
{
struct lov_comp_md_v1 *comp_v1;
struct lov_mds_md *v1;
__u32 off;
__u32 dom_stripesize = 0;
int i;
bool has_ost_stripes = false;
ENTRY;
if (is_dom_only)
*is_dom_only = 0;
if (le32_to_cpu(lmm->lmm_magic) != LOV_MAGIC_COMP_V1)
RETURN(0);
comp_v1 = (struct lov_comp_md_v1 *)lmm;
off = le32_to_cpu(comp_v1->lcm_entries[0].lcme_offset);
v1 = (struct lov_mds_md *)((char *)comp_v1 + off);
/* Fast check for DoM entry with no mirroring, should be the first */
if (le16_to_cpu(comp_v1->lcm_mirror_count) == 0 &&
!(lov_pattern(le32_to_cpu(v1->lmm_pattern)) & LOV_PATTERN_MDT))
RETURN(0);
/* check all entries otherwise */
for (i = 0; i < le16_to_cpu(comp_v1->lcm_entry_count); i++) {
struct lov_comp_md_entry_v1 *lcme;
lcme = &comp_v1->lcm_entries[i];
if (!(le32_to_cpu(lcme->lcme_flags) & LCME_FL_INIT))
continue;
off = le32_to_cpu(lcme->lcme_offset);
v1 = (struct lov_mds_md *)((char *)comp_v1 + off);
if (lov_pattern(le32_to_cpu(v1->lmm_pattern)) &
LOV_PATTERN_MDT)
dom_stripesize = le32_to_cpu(v1->lmm_stripe_size);
else
has_ost_stripes = true;
if (dom_stripesize && has_ost_stripes)
RETURN(dom_stripesize);
}
/* DoM-only case exits here */
if (is_dom_only && dom_stripesize)
*is_dom_only = 1;
RETURN(dom_stripesize);
}
/* Pack size attributes into the reply. */
int mdt_pack_size2body(struct mdt_thread_info *info,
const struct lu_fid *fid, struct lustre_handle *lh)
{
struct mdt_body *b;
struct md_attr *ma = &info->mti_attr;
__u32 dom_stripe;
bool dom_lock = false;
ENTRY;
LASSERT(ma->ma_attr.la_valid & LA_MODE);
if (!S_ISREG(ma->ma_attr.la_mode) ||
!(ma->ma_valid & MA_LOV && ma->ma_lmm != NULL))
RETURN(-ENODATA);
dom_stripe = mdt_lmm_dom_stripesize(ma->ma_lmm);
/* no DoM stripe, no size in reply */
if (!dom_stripe)
RETURN(-ENOENT);
if (lustre_handle_is_used(lh)) {
struct ldlm_lock *lock;
lock = ldlm_handle2lock(lh);
if (lock != NULL) {
dom_lock = ldlm_has_dom(lock);
ldlm_lock_put(lock);
}
}
/* no DoM lock, no size in reply */
if (!dom_lock)
RETURN(0);
/* Either DoM lock exists or LMM has only DoM stripe then
* return size on body.
*/
b = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
mdt_dom_object_size(info->mti_env, info->mti_mdt, fid, b, dom_lock);
RETURN(0);
}
#ifdef CONFIG_LUSTRE_FS_POSIX_ACL
/*
* Pack ACL data into the reply. UIDs/GIDs are mapped and filtered by nodemap.
*
* \param info thread info object
* \param repbody reply to pack ACLs into
* \param o mdt object of file to examine
* \param nodemap nodemap of client to reply to
* \retval 0 success
* \retval -errno error getting or parsing ACL from disk
*/
int mdt_pack_acl2body(struct mdt_thread_info *info, struct mdt_body *repbody,
struct mdt_object *o, struct lu_nodemap *nodemap)
{
const struct lu_env *env = info->mti_env;
struct md_object *next = mdt_object_child(o);
struct lu_buf *buf = &info->mti_buf;
struct mdt_device *mdt = info->mti_mdt;
struct req_capsule *pill = info->mti_pill;
int rc;
ENTRY;
buf->lb_buf = req_capsule_server_get(pill, &RMF_ACL);
buf->lb_len = req_capsule_get_size(pill, &RMF_ACL, RCL_SERVER);
if (buf->lb_len == 0)
RETURN(0);
LASSERT(!info->mti_big_acl_used);
again:
rc = mo_xattr_get(env, next, buf, XATTR_NAME_ACL_ACCESS);
if (rc < 0) {
if (rc == -ENODATA) {
repbody->mbo_aclsize = 0;
repbody->mbo_valid |= OBD_MD_FLACL;
rc = 0;
} else if (rc == -EOPNOTSUPP) {
rc = 0;
} else if (rc == -ERANGE) {
if (exp_connect_large_acl(info->mti_exp) &&
!info->mti_big_acl_used) {
if (info->mti_big_acl == NULL) {
info->mti_big_aclsize =
min_t(unsigned int,
mdt->mdt_max_ea_size,
XATTR_SIZE_MAX);
OBD_ALLOC_LARGE(info->mti_big_acl,
info->mti_big_aclsize);
if (info->mti_big_acl == NULL) {
info->mti_big_aclsize = 0;
CERROR("%s: unable to grow "
DFID" ACL buffer\n",
mdt_obd_name(mdt),
PFID(mdt_object_fid(o)));
RETURN(-ENOMEM);
}
}
CDEBUG(D_INODE, "%s: grow the "DFID
" ACL buffer to size %d\n",
mdt_obd_name(mdt),
PFID(mdt_object_fid(o)),
info->mti_big_aclsize);
buf->lb_buf = info->mti_big_acl;
buf->lb_len = info->mti_big_aclsize;
info->mti_big_acl_used = 1;
goto again;
}
/* FS has ACL bigger that our limits */
CDEBUG(D_INODE, "%s: "DFID" ACL can't fit into %d\n",
mdt_obd_name(mdt), PFID(mdt_object_fid(o)),
info->mti_big_aclsize);
rc = -E2BIG;
} else {
CERROR("%s: unable to read "DFID" ACL: rc = %d\n",
mdt_obd_name(mdt), PFID(mdt_object_fid(o)), rc);
}
} else {
rc = nodemap_map_acl(nodemap, buf->lb_buf,
rc, NODEMAP_FS_TO_CLIENT);
/* if all ACLs mapped out, rc is still >= 0 */
if (rc < 0) {
CERROR("%s: nodemap_map_acl unable to parse "DFID
" ACL: rc = %d\n", mdt_obd_name(mdt),
PFID(mdt_object_fid(o)), rc);
repbody->mbo_aclsize = 0;
repbody->mbo_valid &= ~OBD_MD_FLACL;
} else {
repbody->mbo_aclsize = rc;
repbody->mbo_valid |= OBD_MD_FLACL;
rc = 0;
}
}
RETURN(rc);
}
#endif
/* XXX Look into layout in MDT layer. */
static inline bool mdt_hsm_is_released(struct lov_mds_md *lmm)
{
struct lov_comp_md_v1 *comp_v1;
struct lov_mds_md *v1;
int i;
if (lmm->lmm_magic == LOV_MAGIC_COMP_V1) {
comp_v1 = (struct lov_comp_md_v1 *)lmm;
for (i = 0; i < comp_v1->lcm_entry_count; i++) {
v1 = (struct lov_mds_md *)((char *)comp_v1 +
comp_v1->lcm_entries[i].lcme_offset);
/* We don't support partial release for now */
if (!(v1->lmm_pattern & LOV_PATTERN_F_RELEASED))
return false;
}
return true;
} else {
return (lmm->lmm_pattern & LOV_PATTERN_F_RELEASED) ?
true : false;
}
}
void mdt_pack_attr2body(struct mdt_thread_info *info, struct mdt_body *b,
const struct lu_attr *attr, const struct lu_fid *fid)
{
struct mdt_device *mdt = info->mti_mdt;
struct obd_export *exp = info->mti_exp;
struct md_attr *ma = &info->mti_attr;
struct lu_nodemap *nodemap = NULL;
LASSERT(ma->ma_valid & MA_INODE);
if (attr->la_valid & LA_ATIME) {
b->mbo_atime = attr->la_atime;
b->mbo_valid |= OBD_MD_FLATIME;
}
if (attr->la_valid & LA_MTIME) {
b->mbo_mtime = attr->la_mtime;
b->mbo_valid |= OBD_MD_FLMTIME;
}
if (attr->la_valid & LA_CTIME) {
b->mbo_ctime = attr->la_ctime;
b->mbo_valid |= OBD_MD_FLCTIME;
}
if (attr->la_valid & LA_BTIME) {
b->mbo_btime = attr->la_btime;
b->mbo_valid |= OBD_MD_FLBTIME;
}
if (attr->la_valid & LA_FLAGS) {
b->mbo_flags = attr->la_flags;
b->mbo_valid |= OBD_MD_FLFLAGS;
}
if (attr->la_valid & LA_NLINK) {
b->mbo_nlink = attr->la_nlink;
b->mbo_valid |= OBD_MD_FLNLINK;
}
if (attr->la_valid & (LA_UID|LA_GID|LA_PROJID)) {
nodemap = nodemap_get_from_exp(exp);
if (IS_ERR(nodemap))
goto out;
}
if (attr->la_valid & LA_UID) {
b->mbo_uid = nodemap_map_id(nodemap, NODEMAP_UID,
NODEMAP_FS_TO_CLIENT,
attr->la_uid);
b->mbo_valid |= OBD_MD_FLUID;
}
if (attr->la_valid & LA_GID) {
b->mbo_gid = nodemap_map_id(nodemap, NODEMAP_GID,
NODEMAP_FS_TO_CLIENT,
attr->la_gid);
b->mbo_valid |= OBD_MD_FLGID;
}
if (attr->la_valid & LA_PROJID) {
b->mbo_projid = nodemap_map_id(nodemap, NODEMAP_PROJID,
NODEMAP_FS_TO_CLIENT,
attr->la_projid);
b->mbo_valid |= OBD_MD_FLPROJID;
}
b->mbo_mode = attr->la_mode;
if (attr->la_valid & LA_MODE)
b->mbo_valid |= OBD_MD_FLMODE;
if (attr->la_valid & LA_TYPE)
b->mbo_valid |= OBD_MD_FLTYPE;
if (fid != NULL) {
b->mbo_fid1 = *fid;
b->mbo_valid |= OBD_MD_FLID;
CDEBUG(D_INODE, DFID": nlink=%d, mode=%o, valid=%#llx\n",
PFID(fid), b->mbo_nlink, b->mbo_mode, b->mbo_valid);
}
if (!(attr->la_valid & LA_TYPE))
return;
b->mbo_rdev = attr->la_rdev;
b->mbo_size = attr->la_size;
b->mbo_blocks = attr->la_blocks;
if (!S_ISREG(attr->la_mode)) {
b->mbo_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLRDEV;
} else if (ma->ma_need & MA_LOV && !(ma->ma_valid & MA_LOV)) {
/* means no objects are allocated on osts. */
LASSERT(!(ma->ma_valid & MA_LOV));
/* just ignore blocks occupied by extend attributes on MDS */
b->mbo_blocks = 0;
/* if no object is allocated on osts, the size on mds is valid.
* b=22272
*/
b->mbo_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
} else if ((ma->ma_valid & MA_LOV) && ma->ma_lmm != NULL) {
if (mdt_hsm_is_released(ma->ma_lmm)) {
/* A released file stores its size on MDS. */
/* But return 1 block for released file, unless tools
* like tar will consider it fully sparse. (LU-3864)
*/
if (unlikely(b->mbo_size == 0))
b->mbo_blocks = 0;
else
b->mbo_blocks = 1;
b->mbo_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
} else if (info->mti_som_strict && mdt->mdt_enable_strict_som) {
/* use SOM for size*/
b->mbo_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
} else if (ma->ma_valid & MA_SOM) { /* lsom is valid */
b->mbo_valid |= OBD_MD_FLLAZYSIZE | OBD_MD_FLLAZYBLOCKS;
b->mbo_size = ma->ma_som.ms_size;
b->mbo_blocks = ma->ma_som.ms_blocks;
}
}
if (fid != NULL && (b->mbo_valid & OBD_MD_FLSIZE ||
b->mbo_valid & OBD_MD_FLLAZYSIZE))
CDEBUG(D_VFSTRACE, DFID": returning size %llu\n",
PFID(fid), (unsigned long long)b->mbo_size);
out:
if (!IS_ERR_OR_NULL(nodemap))
nodemap_putref(nodemap);
}
static inline int mdt_body_has_lov(const struct lu_attr *la,
const struct mdt_body *body)
{
return (S_ISREG(la->la_mode) && (body->mbo_valid & OBD_MD_FLEASIZE)) ||
(S_ISDIR(la->la_mode) && (body->mbo_valid & OBD_MD_FLDIREA));
}
void mdt_client_compatibility(struct mdt_thread_info *info)
{
struct mdt_body *body;
struct ptlrpc_request *req = mdt_info_req(info);
struct obd_export *exp = req->rq_export;
struct md_attr *ma = &info->mti_attr;
struct lu_attr *la = &ma->ma_attr;
ENTRY;
if (exp_connect_layout(exp))
/* the client can deal with 16-bit lmm_stripe_count */
RETURN_EXIT;
body = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
if (!mdt_body_has_lov(la, body))
RETURN_EXIT;
/* now we have a reply with a lov for a client not compatible with the
* layout lock so we have to clean the layout generation number
*/
if (S_ISREG(la->la_mode))
ma->ma_lmm->lmm_layout_gen = 0;
EXIT;
}
static int mdt_attr_get_eabuf_size(struct mdt_thread_info *info,
struct mdt_object *o)
{
const struct lu_env *env = info->mti_env;
int rc, rc2;
rc = mo_xattr_get(env, mdt_object_child(o), &LU_BUF_NULL,
XATTR_NAME_LOV);
if (rc == -ENODATA)
rc = 0;
if (rc < 0)
goto out;
/* Is it a directory? Let's check for the LMV as well */
if (S_ISDIR(lu_object_attr(&mdt_object_child(o)->mo_lu))) {
rc2 = mo_xattr_get(env, mdt_object_child(o), &LU_BUF_NULL,
XATTR_NAME_LMV);
if (rc2 == -ENODATA)
rc2 = mo_xattr_get(env, mdt_object_child(o),
&LU_BUF_NULL,
XATTR_NAME_DEFAULT_LMV);
if ((rc2 < 0 && rc2 != -ENODATA) || (rc2 > rc))
rc = rc2;
}
out:
return rc;
}
int mdt_big_xattr_get(struct mdt_thread_info *info, struct mdt_object *o,
const char *name)
{
const struct lu_env *env = info->mti_env;
void *big_lmm;
int big_size, rc;
bool using_big_lmv;
ENTRY;
rc = mo_xattr_get(env, mdt_object_child(o), &LU_BUF_NULL, name);
if (rc < 0)
RETURN(rc);
if (strcmp(name, XATTR_NAME_LMV) == 0) {
LASSERT(info->mti_big_lmv_used == 0);
big_size = info->mti_big_lmvsize;
big_lmm = info->mti_big_lmv;
using_big_lmv = true;
} else {
LASSERT(info->mti_big_lov_used == 0);
big_size = info->mti_big_lovsize;
big_lmm = info->mti_big_lov;
using_big_lmv = false;
}
/* big_lmm may need to be grown */
if (big_size < rc) {
int size = size_roundup_power2(rc);
if (big_size > 0) {
/* free old buffer */
LASSERT(big_lmm);
OBD_FREE_LARGE(big_lmm, big_size);
big_lmm = NULL;
big_size = 0;
}
OBD_ALLOC_LARGE(big_lmm, size);
if (big_lmm == NULL)
GOTO(out, rc = -ENOMEM);
big_size = size;
}
LASSERT(big_size >= rc);
info->mti_buf.lb_buf = big_lmm;
info->mti_buf.lb_len = big_size;
rc = mo_xattr_get(env, mdt_object_child(o), &info->mti_buf, name);
out:
if (using_big_lmv) {
info->mti_big_lmvsize = big_size;
info->mti_big_lmv = big_lmm;
} else {
info->mti_big_lovsize = big_size;
info->mti_big_lov = big_lmm;
}
RETURN(rc);
}
int __mdt_stripe_get(struct mdt_thread_info *info, struct mdt_object *o,
struct md_attr *ma, const char *name)
{
struct md_object *next = mdt_object_child(o);
struct lu_buf *buf = &info->mti_buf;
int rc;
bool is_lov = false;
if (strcmp(name, XATTR_NAME_LOV) == 0) {
buf->lb_buf = ma->ma_lmm;
buf->lb_len = ma->ma_lmm_size;
is_lov = true;
LASSERT(!(ma->ma_valid & MA_LOV));
} else if (strcmp(name, XATTR_NAME_LMV) == 0) {
buf->lb_buf = ma->ma_lmv;
buf->lb_len = ma->ma_lmv_size;
LASSERT(!(ma->ma_valid & MA_LMV));
} else if (strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0) {
buf->lb_buf = ma->ma_default_lmv;
buf->lb_len = ma->ma_default_lmv_size;
LASSERT(!(ma->ma_valid & MA_LMV_DEF));
} else {
return -EINVAL;
}
LASSERT(buf->lb_buf);
if (!mdt_object_exists(o))
return -ENOENT;
if (mdt_object_remote(o) && S_ISDIR(lu_object_attr(&o->mot_obj)))
/* force reload layout for remote dir in case layout changed */
mo_invalidate(info->mti_env, mdt_object_child(o));
rc = mo_xattr_get(info->mti_env, next, buf, name);
if (rc > 0) {
got:
if (strcmp(name, XATTR_NAME_LOV) == 0) {
if (info->mti_big_lov_used) {
LASSERT(info->mti_big_lovsize >= rc);
ma->ma_lmm = info->mti_big_lov;
}
/* NOT return LOV EA with hole to old client. */
if (unlikely(le32_to_cpu(ma->ma_lmm->lmm_pattern) &
LOV_PATTERN_F_HOLE) &&
!(exp_connect_flags(info->mti_exp) &
OBD_CONNECT_LFSCK)) {
return -EIO;
}
ma->ma_lmm_size = rc;
ma->ma_valid |= MA_LOV;
} else if (strcmp(name, XATTR_NAME_LMV) == 0) {
if (info->mti_big_lmv_used) {
LASSERT(info->mti_big_lmvsize >= rc);
ma->ma_lmv = info->mti_big_lmv;
}
ma->ma_lmv_size = rc;
ma->ma_valid |= MA_LMV;
} else if (strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0) {
ma->ma_default_lmv_size = rc;
ma->ma_valid |= MA_LMV_DEF;
}
/* Update mdt_max_mdsize so all clients will be aware that */
if (info->mti_mdt->mdt_max_mdsize < rc)
info->mti_mdt->mdt_max_mdsize = rc;
rc = 0;
} else if (rc == -ENODATA) {
/* no LOV EA */
rc = 0;
} else if (rc == -ERANGE) {
/* Default LMV has fixed size, so it must be able to fit
* in the original buffer
*/
if (strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0)
return rc;
rc = mdt_big_xattr_get(info, o, name);
if (rc > 0) {
if (is_lov)
info->mti_big_lov_used = 1;
else
info->mti_big_lmv_used = 1;
goto got;
}
}
return rc;
}
int mdt_stripe_get(struct mdt_thread_info *info, struct mdt_object *o,
struct md_attr *ma, const char *name)
{
void *big_lmm = NULL;
int big_size, rc;
bool is_lmv;
if (strcmp(name, XATTR_NAME_LOV) == 0) {
big_size = info->mti_big_lovsize;
big_lmm = info->mti_big_lov;
is_lmv = false;
} else if (strcmp(name, XATTR_NAME_LMV) == 0) {
big_size = info->mti_big_lmvsize;
big_lmm = info->mti_big_lmv;
is_lmv = true;
} else {
LBUG();
}
if (!big_lmm) {
OBD_ALLOC_LARGE(big_lmm, PAGE_SIZE);
if (!big_lmm)
return -ENOMEM;
big_size = PAGE_SIZE;
}
if (is_lmv) {
info->mti_big_lmvsize = ma->ma_lmv_size = big_size;
info->mti_big_lmv = ma->ma_lmv = big_lmm;
ma->ma_valid &= ~MA_LMV;
} else {
info->mti_big_lovsize = ma->ma_lmm_size = big_size;
info->mti_big_lov = ma->ma_lmm = big_lmm;
ma->ma_valid &= ~MA_LOV;
}
rc = __mdt_stripe_get(info, o, ma, name);
return rc;
}
int mdt_attr_get_pfid(struct mdt_thread_info *info, struct mdt_object *o,
struct lu_fid *pfid)
{
struct lu_buf *buf = &info->mti_buf;
struct link_ea_header *leh;
struct link_ea_entry *lee;
int rc;
ENTRY;
buf->lb_buf = info->mti_xattr_buf;
buf->lb_len = sizeof(info->mti_xattr_buf);
rc = mo_xattr_get(info->mti_env, mdt_object_child(o),
buf, XATTR_NAME_LINK);
/* ignore errors, MA_PFID won't be set and it is
* up to the caller to treat this as an error
*/
if (rc == -ERANGE || buf->lb_len == 0) {
rc = mdt_big_xattr_get(info, o, XATTR_NAME_LINK);
buf->lb_buf = info->mti_big_lov;
buf->lb_len = info->mti_big_lovsize;
}
if (rc < 0)
RETURN(rc);
if (rc < sizeof(*leh)) {
CERROR("short LinkEA on "DFID": rc = %d\n",
PFID(mdt_object_fid(o)), rc);
RETURN(-ENODATA);
}
leh = (struct link_ea_header *) buf->lb_buf;
lee = (struct link_ea_entry *)(leh + 1);
if (leh->leh_magic == __swab32(LINK_EA_MAGIC)) {
leh->leh_magic = LINK_EA_MAGIC;
leh->leh_reccount = __swab32(leh->leh_reccount);
leh->leh_len = __swab64(leh->leh_len);
}
if (leh->leh_magic != LINK_EA_MAGIC)
RETURN(-EINVAL);
if (leh->leh_reccount == 0)
RETURN(-ENODATA);
memcpy(pfid, &lee->lee_parent_fid, sizeof(*pfid));
fid_be_to_cpu(pfid, pfid);
RETURN(0);
}
int mdt_attr_get_pfid_name(struct mdt_thread_info *info, struct mdt_object *o,
struct lu_fid *pfid, struct lu_name *lname)
{
struct lu_buf *buf = &info->mti_buf;
struct link_ea_header *leh;
struct link_ea_entry *lee;
int reclen;
int rc;
buf->lb_buf = info->mti_xattr_buf;
buf->lb_len = sizeof(info->mti_xattr_buf);
rc = mo_xattr_get(info->mti_env, mdt_object_child(o), buf,
XATTR_NAME_LINK);
if (rc == -ERANGE) {
rc = mdt_big_xattr_get(info, o, XATTR_NAME_LINK);
buf->lb_buf = info->mti_big_lov;
buf->lb_len = info->mti_big_lovsize;
}
if (rc < 0)
return rc;
if (rc < sizeof(*leh)) {
CERROR("short LinkEA on "DFID": rc = %d\n",
PFID(mdt_object_fid(o)), rc);
return -ENODATA;
}
leh = (struct link_ea_header *)buf->lb_buf;
lee = (struct link_ea_entry *)(leh + 1);
if (leh->leh_magic == __swab32(LINK_EA_MAGIC)) {
leh->leh_magic = LINK_EA_MAGIC;
leh->leh_reccount = __swab32(leh->leh_reccount);
leh->leh_len = __swab64(leh->leh_len);
}
if (leh->leh_magic != LINK_EA_MAGIC)
return -EINVAL;
if (leh->leh_reccount == 0)
return -ENODATA;
linkea_entry_unpack(lee, &reclen, lname, pfid);
return 0;
}
int mdt_attr_get_complex(struct mdt_thread_info *info,
struct mdt_object *o, struct md_attr *ma)
{
const struct lu_env *env = info->mti_env;
struct md_object *next = mdt_object_child(o);
struct lu_buf *buf = &info->mti_buf;
int need = ma->ma_need;
int rc = 0, rc2;
u32 mode;
ENTRY;
ma->ma_valid = 0;
if (mdt_object_exists(o) == 0)
GOTO(out, rc = -ENOENT);
mode = lu_object_attr(&next->mo_lu);
if (need & MA_INODE) {
ma->ma_need = MA_INODE;
if (need & MA_DIRENT_CNT)
ma->ma_attr.la_valid |= LA_DIRENT_CNT;
else
ma->ma_attr.la_valid &= ~LA_DIRENT_CNT;
rc = mo_attr_get(env, next, ma);
if (rc)
GOTO(out, rc);
if (S_ISREG(mode))
(void) mdt_get_som(info, o, ma);
ma->ma_valid |= MA_INODE;
}
if (need & MA_PFID) {
rc = mdt_attr_get_pfid(info, o, &ma->ma_pfid);
if (rc == 0)
ma->ma_valid |= MA_PFID;
/* ignore this error, parent fid is not mandatory */
rc = 0;
}
if (need & MA_LOV && (S_ISREG(mode) || S_ISDIR(mode))) {
rc = __mdt_stripe_get(info, o, ma, XATTR_NAME_LOV);
if (rc)
GOTO(out, rc);
}
if (need & MA_LMV && S_ISDIR(mode)) {
rc = __mdt_stripe_get(info, o, ma, XATTR_NAME_LMV);
if (rc != 0)
GOTO(out, rc);
}
if (need & MA_LMV_DEF && S_ISDIR(mode)) {
rc = __mdt_stripe_get(info, o, ma, XATTR_NAME_DEFAULT_LMV);
if (rc != 0)
GOTO(out, rc);
}
/* In the handle of MA_INODE, we may already get the SOM attr. */
if (need & MA_SOM && S_ISREG(mode) && !(ma->ma_valid & MA_SOM)) {
rc = mdt_get_som(info, o, ma);
if (rc != 0)
GOTO(out, rc);
}
if (need & MA_HSM && S_ISREG(mode)) {
buf->lb_buf = info->mti_xattr_buf;
buf->lb_len = sizeof(info->mti_xattr_buf);
BUILD_BUG_ON(sizeof(struct hsm_attrs) >
sizeof(info->mti_xattr_buf));
rc2 = mo_xattr_get(info->mti_env, next, buf, XATTR_NAME_HSM);
rc2 = lustre_buf2hsm(info->mti_xattr_buf, rc2, &ma->ma_hsm);
if (rc2 == 0)
ma->ma_valid |= MA_HSM;
else if (rc2 < 0 && rc2 != -ENODATA)
GOTO(out, rc = rc2);
}
#ifdef CONFIG_LUSTRE_FS_POSIX_ACL
if (need & MA_ACL_DEF && S_ISDIR(mode)) {
buf->lb_buf = ma->ma_acl;
buf->lb_len = ma->ma_acl_size;
rc2 = mo_xattr_get(env, next, buf, XATTR_NAME_ACL_DEFAULT);
if (rc2 > 0) {
ma->ma_acl_size = rc2;
ma->ma_valid |= MA_ACL_DEF;
} else if (rc2 == -ENODATA) {
/* no ACLs */
ma->ma_acl_size = 0;
} else
GOTO(out, rc = rc2);
}
#endif
out:
ma->ma_need = need;
CDEBUG(D_INODE, "after getattr rc = %d, ma_valid = %#llx ma_lmm=%p\n",
rc, ma->ma_valid, ma->ma_lmm);
RETURN(rc);
}
static void mdt_preset_encctx_size(struct mdt_thread_info *info)
{
struct req_capsule *pill = info->mti_pill;
ENTRY;
if (req_capsule_has_field(pill, &RMF_FILE_ENCCTX,
RCL_SERVER))
/* pre-set size in server part with max size */
req_capsule_set_size(pill, &RMF_FILE_ENCCTX,
RCL_SERVER,
info->mti_mdt->mdt_max_mdsize);
EXIT;
}
static int mdt_getattr_internal(struct mdt_thread_info *info,
struct mdt_object *o, int ma_need)
{
struct mdt_device *mdt = info->mti_mdt;
struct md_object *next = mdt_object_child(o);
const struct mdt_body *reqbody = info->mti_body;
struct ptlrpc_request *req = mdt_info_req(info);
struct md_attr *ma = &info->mti_attr;
struct lu_attr *la = &ma->ma_attr;
struct req_capsule *pill = info->mti_pill;
const struct lu_env *env = info->mti_env;
struct mdt_body *repbody;
struct lu_buf *buffer = &info->mti_buf;
struct obd_export *exp = info->mti_exp;
ktime_t kstart = ktime_get();
int rc;
ENTRY;
if (CFS_FAIL_CHECK(OBD_FAIL_MDS_GETATTR_PACK))
RETURN(err_serious(-ENOMEM));
repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
ma->ma_valid = 0;
if (mdt_object_remote(o)) {
/* obj is located on remote node Return -ENOTSUPP(old client) */
if (!mdt_is_dne_client(req->rq_export))
GOTO(out, rc = -ENOTSUPP);
repbody->mbo_fid1 = *mdt_object_fid(o);
repbody->mbo_valid = OBD_MD_FLID | OBD_MD_MDS;
GOTO(out, rc = 0);
}
if (reqbody->mbo_eadatasize > 0) {
buffer->lb_buf = req_capsule_server_get(pill, &RMF_MDT_MD);
if (buffer->lb_buf == NULL)
GOTO(out, rc = -EPROTO);
buffer->lb_len = req_capsule_get_size(pill, &RMF_MDT_MD,
RCL_SERVER);
} else {
buffer->lb_buf = NULL;
buffer->lb_len = 0;
ma_need &= ~(MA_LOV | MA_LMV);
CDEBUG(D_INFO, "%s: RPC from %s: does not need LOVEA.\n",
mdt_obd_name(info->mti_mdt),
req->rq_export->exp_client_uuid.uuid);
}
/* from 2.12.58 intent_getattr pack default LMV in reply */
if (S_ISDIR(lu_object_attr(&next->mo_lu)) &&
((reqbody->mbo_valid & (OBD_MD_MEA | OBD_MD_DEFAULT_MEA)) ==
(OBD_MD_MEA | OBD_MD_DEFAULT_MEA)) &&
req_capsule_has_field(&req->rq_pill, &RMF_DEFAULT_MDT_MD,
RCL_SERVER)) {
ma->ma_lmv = buffer->lb_buf;
ma->ma_lmv_size = buffer->lb_len;
ma->ma_default_lmv = req_capsule_server_get(pill,
&RMF_DEFAULT_MDT_MD);
ma->ma_default_lmv_size = req_capsule_get_size(pill,
&RMF_DEFAULT_MDT_MD,
RCL_SERVER);
ma->ma_need = MA_INODE;
if (ma->ma_lmv_size > 0)
ma->ma_need |= MA_LMV;
if (ma->ma_default_lmv_size > 0)
ma->ma_need |= MA_LMV_DEF;
} else if (S_ISDIR(lu_object_attr(&next->mo_lu)) &&
(reqbody->mbo_valid & (OBD_MD_MEA | OBD_MD_DEFAULT_MEA))) {
/* If it is dir and client require MEA, then we got MEA */
/* Assumption: MDT_MD size is enough for lmv size. */
ma->ma_lmv = buffer->lb_buf;
ma->ma_lmv_size = buffer->lb_len;
ma->ma_need = MA_INODE;
if (ma->ma_lmv_size > 0) {
if (reqbody->mbo_valid & OBD_MD_MEA) {
ma->ma_need |= MA_LMV;
} else if (reqbody->mbo_valid & OBD_MD_DEFAULT_MEA) {
ma->ma_need |= MA_LMV_DEF;
ma->ma_default_lmv = buffer->lb_buf;
ma->ma_lmv = NULL;
ma->ma_default_lmv_size = buffer->lb_len;
ma->ma_lmv_size = 0;
}
}
} else {
ma->ma_lmm = buffer->lb_buf;
ma->ma_lmm_size = buffer->lb_len;
ma->ma_need = MA_INODE | MA_HSM;
if (ma->ma_lmm_size > 0) {
ma->ma_need |= MA_LOV;
/* Older clients may crash if they getattr overstriped
* files
*/
if (!exp_connect_overstriping(exp) &&
mdt_lmm_is_overstriping(ma->ma_lmm))
RETURN(-EOPNOTSUPP);
}
}
if (S_ISDIR(lu_object_attr(&next->mo_lu)) &&
reqbody->mbo_valid & OBD_MD_FLDIREA &&
lustre_msg_get_opc(req->rq_reqmsg) == MDS_GETATTR) {
/* get default stripe info for this dir. */
ma->ma_need |= MA_LOV_DEF;
}
ma->ma_need |= ma_need;
rc = mdt_attr_get_complex(info, o, ma);
if (unlikely(rc)) {
CDEBUG_LIMIT(rc == -ENOENT ? D_OTHER : D_ERROR,
"%s: getattr error for "DFID": rc = %d\n",
mdt_obd_name(info->mti_mdt),
PFID(mdt_object_fid(o)), rc);
RETURN(rc);
}
/* return immutable attr on fscrypt metadata files
* if fscrypt admin is not permitted
*/
if (o->mot_obj.lo_header->loh_attr & LOHA_FSCRYPT_MD &&
!mdt_ucred(info)->uc_rbac_fscrypt_admin)
la->la_flags |= LUSTRE_IMMUTABLE_FL;
/* if file is released, check if a restore is running */
if (ma->ma_valid & MA_HSM) {
repbody->mbo_valid |= OBD_MD_TSTATE;
if ((ma->ma_hsm.mh_flags & HS_RELEASED) &&
mdt_hsm_restore_is_running(info, mdt_object_fid(o)))
repbody->mbo_t_state = MS_RESTORE;
}
if (unlikely(!(ma->ma_valid & MA_INODE)))
RETURN(-EFAULT);
mdt_pack_attr2body(info, repbody, la, mdt_object_fid(o));
if (mdt_body_has_lov(la, reqbody)) {
u32 stripe_count = 1;
bool fixed_layout = false;
if (ma->ma_valid & MA_LOV) {
LASSERT(ma->ma_lmm_size);
repbody->mbo_eadatasize = ma->ma_lmm_size;
if (S_ISDIR(la->la_mode))
repbody->mbo_valid |= OBD_MD_FLDIREA;
else
repbody->mbo_valid |= OBD_MD_FLEASIZE;
mdt_dump_lmm(D_INFO, ma->ma_lmm, repbody->mbo_valid);
}
if (ma->ma_valid & MA_LMV) {
struct lmv_mds_md_v1 *lmv = &ma->ma_lmv->lmv_md_v1;
u32 magic = le32_to_cpu(lmv->lmv_magic);
/* Return -ENOTSUPP for old client */
if (!mdt_is_striped_client(req->rq_export))
RETURN(-ENOTSUPP);
LASSERT(S_ISDIR(la->la_mode));
mdt_dump_lmv(D_INFO, ma->ma_lmv);
repbody->mbo_eadatasize = ma->ma_lmv_size;
repbody->mbo_valid |= (OBD_MD_FLDIREA|OBD_MD_MEA);
stripe_count = le32_to_cpu(lmv->lmv_stripe_count);
fixed_layout = lmv_is_fixed(lmv);
if (magic == LMV_MAGIC_STRIPE && lmv_is_restriping(lmv))
mdt_restripe_migrate_add(info, o);
else if (magic == LMV_MAGIC_V1 &&
lmv_is_restriping(lmv))
mdt_restripe_update_add(info, o);
}
if (ma->ma_valid & MA_LMV_DEF) {
/* Return -ENOTSUPP for old client */
if (!mdt_is_striped_client(req->rq_export))
RETURN(-ENOTSUPP);
LASSERT(S_ISDIR(la->la_mode));
/*
* when ll_dir_getstripe() gets default LMV, it
* checks mbo_eadatasize.
*/
if (!(ma->ma_valid & MA_LMV))
repbody->mbo_eadatasize =
ma->ma_default_lmv_size;
repbody->mbo_valid |= (OBD_MD_FLDIREA |
OBD_MD_DEFAULT_MEA);
}
CDEBUG(D_VFSTRACE,
"dirent count %llu stripe count %u MDT count %d\n",
ma->ma_attr.la_dirent_count, stripe_count,
atomic_read(&mdt->mdt_mds_mds_conns) + 1);
if (ma->ma_attr.la_dirent_count != LU_DIRENT_COUNT_UNSET &&
ma->ma_attr.la_dirent_count >
mdt->mdt_restriper.mdr_dir_split_count &&
!fid_is_root(mdt_object_fid(o)) &&
mdt->mdt_enable_dir_auto_split &&
!o->mot_restriping &&
stripe_count < atomic_read(&mdt->mdt_mds_mds_conns) + 1 &&
!fixed_layout)
mdt_auto_split_add(info, o);
} else if (S_ISLNK(la->la_mode) &&
reqbody->mbo_valid & OBD_MD_LINKNAME) {
buffer->lb_buf = ma->ma_lmm;
/* eadatasize from client includes NULL-terminator, so
* there is no need to read it
*/
buffer->lb_len = 0;
if (reqbody->mbo_eadatasize > 0)
buffer->lb_len = reqbody->mbo_eadatasize - 1;
rc = mo_readlink(env, next, buffer);
if (unlikely(rc <= 0)) {
CERROR("%s: readlink failed for "DFID": rc = %d\n",
mdt_obd_name(info->mti_mdt),
PFID(mdt_object_fid(o)), rc);
rc = -EFAULT;
} else {
int print_limit = min_t(int, PAGE_SIZE - 128, rc);
if (CFS_FAIL_CHECK(OBD_FAIL_MDS_READLINK_EPROTO))
rc -= 2;
repbody->mbo_valid |= OBD_MD_LINKNAME;
/* we need to report back size with NULL-terminator
* because client expects that
*/
repbody->mbo_eadatasize = rc + 1;
if (repbody->mbo_eadatasize != reqbody->mbo_eadatasize)
CDEBUG(D_INODE, "%s: Read shorter symlink %d on "
DFID ", expected %d\n",
mdt_obd_name(info->mti_mdt),
rc, PFID(mdt_object_fid(o)),
reqbody->mbo_eadatasize - 1);
/* NULL terminate */
((char *)ma->ma_lmm)[rc] = 0;
/* If the total CDEBUG() size is larger than a page, it
* will print a warning to the console, avoid this by
* printing just the last part of the symlink.
*/
CDEBUG(D_INODE, "symlink dest %s%.*s, len = %d\n",
print_limit < rc ? "..." : "", print_limit,
(char *)ma->ma_lmm + rc - print_limit, rc);
rc = 0;
}
}
if (reqbody->mbo_valid & OBD_MD_FLMODEASIZE) {
repbody->mbo_max_mdsize = info->mti_mdt->mdt_max_mdsize;
repbody->mbo_valid |= OBD_MD_FLMODEASIZE;
CDEBUG(D_INODE, "changing the max MD size to %u\n",
repbody->mbo_max_mdsize);
}
#ifdef CONFIG_LUSTRE_FS_POSIX_ACL
if ((exp_connect_flags(req->rq_export) & OBD_CONNECT_ACL) &&
(reqbody->mbo_valid & OBD_MD_FLACL)) {
struct lu_nodemap *nodemap = nodemap_get_from_exp(exp);
if (IS_ERR(nodemap))
RETURN(PTR_ERR(nodemap));
rc = mdt_pack_acl2body(info, repbody, o, nodemap);
nodemap_putref(nodemap);
}
#endif
out:
if (rc == 0)
mdt_counter_incr(req, LPROC_MDT_GETATTR,
ktime_us_delta(ktime_get(), kstart));
RETURN(rc);
}
static int mdt_getattr(struct tgt_session_info *tsi)
{
struct mdt_thread_info *info = tsi2mdt_info(tsi);
struct mdt_object *obj = info->mti_object;
struct req_capsule *pill = info->mti_pill;
struct mdt_body *reqbody;
struct mdt_body *repbody;
int rc, rc2;
ENTRY;
if (unlikely(info->mti_object == NULL))
RETURN(-EPROTO);
reqbody = req_capsule_client_get(pill, &RMF_MDT_BODY);
LASSERT(reqbody);
LASSERT(lu_object_exists(&obj->mot_obj));
/* Special case for Data-on-MDT files to get data version */
if (unlikely(reqbody->mbo_valid & OBD_MD_FLDATAVERSION)) {
rc = mdt_data_version_get(tsi);
GOTO(out, rc);
}
/* Unlike intent case where we need to pre-fill out buffers early on
* in intent policy for ldlm reasons, here we can have a much better
* guess at EA size by just reading it from disk.
* Exceptions are readdir and (missing) directory striping
*/
if (reqbody->mbo_valid & OBD_MD_LINKNAME) { /* Readlink */
/* No easy way to know how long is the symlink, but it cannot
* be more than PATH_MAX, so we allocate +1
*/
rc = PATH_MAX + 1;
/* A special case for fs ROOT: getattr there might fetch
* default EA for entire fs, not just for this dir!
*/
} else if (lu_fid_eq(mdt_object_fid(obj),
&info->mti_mdt->mdt_md_root_fid) &&
(reqbody->mbo_valid & OBD_MD_FLDIREA) &&
(lustre_msg_get_opc(mdt_info_req(info)->rq_reqmsg) ==
MDS_GETATTR)) {
/* Should the default strping be bigger, mdt_fix_reply
* will reallocate
*/
rc = DEF_REP_MD_SIZE;
} else {
/* Read the actual EA size from disk */
rc = mdt_attr_get_eabuf_size(info, obj);
}
if (rc < 0)
GOTO(out, rc = err_serious(rc));
req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER, rc);
/* Set ACL reply buffer size as LUSTRE_POSIX_ACL_MAX_SIZE_OLD
* by default. If the target object has more ACL entries, then
* enlarge the buffer when necessary.
*/
req_capsule_set_size(pill, &RMF_ACL, RCL_SERVER,
LUSTRE_POSIX_ACL_MAX_SIZE_OLD);
mdt_preset_encctx_size(info);
rc = req_capsule_server_pack(pill);
if (unlikely(rc != 0))
GOTO(out, rc = err_serious(rc));
repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
LASSERT(repbody != NULL);
repbody->mbo_eadatasize = 0;
repbody->mbo_aclsize = 0;
rc = mdt_check_ucred(info);
if (unlikely(rc))
GOTO(out_shrink, rc);
info->mti_cross_ref = !!(reqbody->mbo_valid & OBD_MD_FLCROSSREF);
rc = mdt_init_ucred(info, reqbody);
if (rc)
GOTO(out_shrink, rc);
rc = mdt_getattr_internal(info, obj, 0);
if (unlikely(rc))
GOTO(out_ucred, rc);
rc = mdt_pack_encctx_in_reply(info, obj);
EXIT;
out_ucred:
mdt_exit_ucred(info);
out_shrink:
mdt_client_compatibility(info);
rc2 = mdt_fix_reply(info);
if (rc == 0)
rc = rc2;
out:
mdt_thread_info_fini(info);
return rc;
}
/**
* Handler of layout intent RPC requiring the layout modification
*
* \param[in] info thread environment
* \param[in] obj object
* \param[out] lhc object ldlm lock handle
* \param[in] layout layout change descriptor
*
* \retval 0 on success
* \retval < 0 error code
*/
int mdt_layout_change(struct mdt_thread_info *info, struct mdt_object *obj,
struct mdt_lock_handle *lhc,
struct md_layout_change *layout)
{
int rc;
ENTRY;
if (!mdt_object_exists(obj))
RETURN(-ENOENT);
if (!S_ISREG(lu_object_attr(&obj->mot_obj)))
RETURN(-EINVAL);
rc = mo_permission(info->mti_env, NULL, mdt_object_child(obj), NULL,
MAY_WRITE);
if (rc)
RETURN(rc);
rc = mdt_check_resent_lock(info, obj, lhc);
if (rc < 0)
RETURN(rc);
if (rc > 0) {
/* not resent */
__u64 lockpart = MDS_INODELOCK_LAYOUT;
/* take layout lock to prepare layout change */
if (layout->mlc_opc == MD_LAYOUT_WRITE)
lockpart |= MDS_INODELOCK_UPDATE;
rc = mdt_object_lock(info, obj, lhc, lockpart, LCK_EX);
if (rc)
RETURN(rc);
CFS_FAIL_TIMEOUT(OBD_FAIL_MDS_LL_PCCRO, cfs_fail_val);
}
mutex_lock(&obj->mot_som_mutex);
rc = mo_layout_change(info->mti_env, mdt_object_child(obj), layout);
mutex_unlock(&obj->mot_som_mutex);
if (rc)
mdt_object_unlock(info, obj, lhc, 1);
RETURN(rc);
}
/**
* Exchange MOF_LOV_CREATED flags between two objects after a
* layout swap. No assumption is made on whether o1 or o2 have
* created objects or not.
*
* \param[in,out] o1 First swap layout object
* \param[in,out] o2 Second swap layout object
*/
static void mdt_swap_lov_flag(struct mdt_object *o1, struct mdt_object *o2)
{
unsigned int o1_lov_created = o1->mot_lov_created;
mutex_lock(&o1->mot_lov_mutex);
mutex_lock(&o2->mot_lov_mutex);
o1->mot_lov_created = o2->mot_lov_created;
o2->mot_lov_created = o1_lov_created;
mutex_unlock(&o2->mot_lov_mutex);
mutex_unlock(&o1->mot_lov_mutex);
}
static int mdt_swap_layouts(struct tgt_session_info *tsi)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
struct obd_export *exp = req->rq_export;
struct mdt_lock_handle *lh1, *lh2;
struct mdt_object *o1, *o2, *o;
struct mdt_thread_info *info;
struct mdc_swap_layouts *msl;
bool swap_objects = false;
__u64 dv1 = 0;
__u64 dv2 = 0;
int rc;
ENTRY;
/* client does not support layout lock, so layout swaping
* is disabled.
* FIXME: there is a problem for old clients which don't support
* layout lock yet. If those clients have already opened the file
* they won't be notified at all so that old layout may still be
* used to do IO. This can be fixed after file release is landed by
* doing exclusive open and taking full EX ibits lock. - Jinshan
*/
if (!exp_connect_layout(exp))
RETURN(-EOPNOTSUPP);
info = tsi2mdt_info(tsi);
if (unlikely(info->mti_object == NULL))
RETURN(-EPROTO);
if (info->mti_dlm_req != NULL)
ldlm_request_cancel(req, info->mti_dlm_req, 0, LATF_SKIP);
o1 = info->mti_object;
o = o2 = mdt_object_find(info->mti_env, info->mti_mdt,
&info->mti_body->mbo_fid2);
if (IS_ERR(o))
GOTO(out, rc = PTR_ERR(o));
if (mdt_object_remote(o) || !mdt_object_exists(o)) /* remote object */
GOTO(put, rc = -ENOENT);
rc = lu_fid_cmp(&info->mti_body->mbo_fid1, &info->mti_body->mbo_fid2);
if (unlikely(rc == 0)) /* same file, you kidding me? no-op. */
GOTO(put, rc);
if (rc < 0) {
swap_objects = true;
swap(o1, o2);
}
/* permission check. Make sure the calling process having permission
* to write both files.
*/
rc = mo_permission(info->mti_env, NULL, mdt_object_child(o1), NULL,
MAY_WRITE);
if (rc < 0)
GOTO(put, rc);
rc = mo_permission(info->mti_env, NULL, mdt_object_child(o2), NULL,
MAY_WRITE);
if (rc < 0)
GOTO(put, rc);
msl = req_capsule_client_get(info->mti_pill, &RMF_SWAP_LAYOUTS);
if (msl == NULL)
GOTO(put, rc = -EPROTO);
if (msl->msl_flags & SWAP_LAYOUTS_WITH_DV12) {
dv1 = msl->msl_dv1;
dv2 = msl->msl_dv2;
if (swap_objects)
swap(dv1, dv2);
}
lh1 = &info->mti_lh[MDT_LH_NEW];
lh2 = &info->mti_lh[MDT_LH_OLD];
rc = mdt_object_lock(info, o1, lh1, MDS_INODELOCK_LAYOUT |
MDS_INODELOCK_XATTR, LCK_EX);
if (rc < 0)
GOTO(put, rc);
rc = mdt_object_lock(info, o2, lh2, MDS_INODELOCK_LAYOUT |
MDS_INODELOCK_XATTR, LCK_EX);
if (rc < 0)
GOTO(unlock1, rc);
rc = mo_swap_layouts(info->mti_env, mdt_object_child(o1),
mdt_object_child(o2), dv1, dv2, msl->msl_flags);
if (rc < 0)
GOTO(unlock2, rc);
mdt_swap_lov_flag(o1, o2);
unlock2:
mdt_object_unlock(info, o2, lh2, rc);
unlock1:
mdt_object_unlock(info, o1, lh1, rc);
put:
mdt_object_put(info->mti_env, o);
out:
mdt_thread_info_fini(info);
RETURN(rc);
}
static int mdt_raw_lookup(struct mdt_thread_info *info,
struct mdt_object *parent,
const struct lu_name *lname)
{
struct lu_fid *fid = &info->mti_tmp_fid1;
struct mdt_body *repbody;
bool is_dotdot = false;
bool is_old_parent_stripe = false;
bool is_new_parent_checked = false;
int rc;
ENTRY;
LASSERT(!info->mti_cross_ref);
/* Always allow to lookup ".." */
if (lname->ln_namelen == 2 &&
lname->ln_name[0] == '.' && lname->ln_name[1] == '.') {
info->mti_spec.sp_permitted = 1;
is_dotdot = true;
if (mdt_is_dir_stripe(info, parent) == 1)
is_old_parent_stripe = true;
}
mdt_object_get(info->mti_env, parent);
lookup:
/* Only got the fid of this obj by name */
fid_zero(fid);
rc = mdo_lookup(info->mti_env, mdt_object_child(parent), lname, fid,
&info->mti_spec);
mdt_object_put(info->mti_env, parent);
if (rc)
RETURN(rc);
/* getattr_name("..") should return master object FID for striped dir */
if (is_dotdot && (is_old_parent_stripe || !is_new_parent_checked)) {
parent = mdt_object_find(info->mti_env, info->mti_mdt, fid);
if (IS_ERR(parent))
RETURN(PTR_ERR(parent));
/* old client getattr_name("..") with stripe FID */
if (unlikely(is_old_parent_stripe)) {
is_old_parent_stripe = false;
goto lookup;
}
/* ".." may be a stripe */
if (unlikely(mdt_is_dir_stripe(info, parent) == 1)) {
is_new_parent_checked = true;
goto lookup;
}
mdt_object_put(info->mti_env, parent);
}
repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
repbody->mbo_fid1 = *fid;
repbody->mbo_valid = OBD_MD_FLID;
RETURN(rc);
}
/**
* Find name matching hash
*
* We search \a child LinkEA for a name whose hash matches \a lname
* (it contains an encoded hash).
*
* \param info mdt thread info
* \param lname encoded hash to find
* \param parent parent object
* \param child object to search with LinkEA
*
* \retval 1 match found
* \retval 0 no match found
* \retval -ev negative errno upon error
*/
int find_name_matching_hash(struct mdt_thread_info *info, struct lu_name *lname,
struct mdt_object *parent, struct mdt_object *child)
{
/* Here, lname is an encoded hash of on-disk name, and
* client is doing access without encryption key.
* So we need to get LinkEA, check parent fid is correct and
* compare name hash with the one in the request.
*/
struct lu_buf *buf = &info->mti_big_buf;
struct lu_name name;
struct lu_fid pfid;
struct linkea_data ldata = { NULL };
struct link_ea_header *leh;
struct link_ea_entry *lee;
struct lu_buf link = { 0 };
char *hash;
int reclen, count, rc;
ENTRY;
if (lname->ln_namelen < LL_CRYPTO_BLOCK_SIZE)
RETURN(-EINVAL);
buf = lu_buf_check_and_alloc(buf, PATH_MAX);
if (!buf->lb_buf)
RETURN(-ENOMEM);
ldata.ld_buf = buf;
rc = mdt_links_read(info, child, &ldata);
if (rc < 0)
RETURN(rc);
hash = kmalloc(lname->ln_namelen, GFP_NOFS);
if (!hash)
RETURN(-ENOMEM);
rc = critical_decode(lname->ln_name, lname->ln_namelen, hash);
leh = buf->lb_buf;
lee = (struct link_ea_entry *)(leh + 1);
for (count = 0; count < leh->leh_reccount; count++) {
linkea_entry_unpack(lee, &reclen, &name, &pfid);
if (!parent || lu_fid_eq(&pfid, mdt_object_fid(parent))) {
lu_buf_check_and_alloc(&link, name.ln_namelen);
if (!link.lb_buf)
GOTO(out_match, rc = -ENOMEM);
rc = critical_decode(name.ln_name, name.ln_namelen,
link.lb_buf);
if (memcmp(LLCRYPT_EXTRACT_DIGEST(link.lb_buf, rc),
hash, LL_CRYPTO_BLOCK_SIZE) == 0) {
*lname = name;
break;
}
}
lee = (struct link_ea_entry *) ((char *)lee + reclen);
}
if (count == leh->leh_reccount)
rc = 0;
else
rc = 1;
out_match:
lu_buf_free(&link);
kfree(hash);
RETURN(rc);
}
/*
* UPDATE lock should be taken against parent, and be released before exit;
* child_bits lock should be taken against child, and be returned back:
* (1)normal request should release the child lock;
* (2)intent request will grant the lock to client.
*/
static int mdt_getattr_name_lock(struct mdt_thread_info *info,
struct mdt_lock_handle *lhc,
enum mds_ibits_locks child_bits,
struct ldlm_reply *ldlm_rep)
{
struct ptlrpc_request *req = mdt_info_req(info);
struct mdt_body *reqbody = NULL;
struct mdt_object *parent = info->mti_object;
struct mdt_object *child = NULL;
struct lu_fid *child_fid = &info->mti_tmp_fid1;
struct lu_name *lname = NULL;
struct mdt_lock_handle *lhp = NULL;
struct ldlm_lock *lock;
struct req_capsule *pill = info->mti_pill;
bool fscrypt_md = false;
enum mds_ibits_locks try_bits = MDS_INODELOCK_NONE;
bool is_resent;
int ma_need = 0;
int rc;
ENTRY;
is_resent = lustre_handle_is_used(&lhc->mlh_reg_lh);
LASSERT(ergo(is_resent,
lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT));
if (parent == NULL)
RETURN(-ENOENT);
if (info->mti_mdt->mdt_enable_dir_auto_split)
ma_need |= MA_DIRENT_CNT;
if (CFS_FAIL_TIMEOUT(OBD_FAIL_MDS_PAUSE_GETATTR, cfs_fail_val))
req->rq_pause_after_reply = 1;
if (info->mti_cross_ref) {
/* Only getattr on the child. Parent is on another node. */
mdt_set_disposition(info, ldlm_rep,
DISP_LOOKUP_EXECD | DISP_LOOKUP_POS);
child = parent;
CDEBUG(D_INODE, "partial getattr_name child_fid = "DFID", ldlm_rep = %p\n",
PFID(mdt_object_fid(child)), ldlm_rep);
rc = mdt_check_resent_lock(info, child, lhc);
if (rc < 0) {
RETURN(rc);
} else if (rc > 0) {
/*
* Object's name entry is on another MDS, it will
* request PERM lock only because LOOKUP lock is owned
* by the MDS where name entry resides.
*
* TODO: it should try layout lock too. - Jinshan
*/
child_bits &= ~(MDS_INODELOCK_LOOKUP |
MDS_INODELOCK_LAYOUT);
child_bits |= MDS_INODELOCK_PERM;
rc = mdt_object_lock(info, child, lhc, child_bits,
LCK_PR);
if (rc < 0)
RETURN(rc);
}
/* Finally, we can get attr for child. */
if (!mdt_object_exists(child)) {
LU_OBJECT_DEBUG(D_INFO, info->mti_env,
&child->mot_obj,
"remote object doesn't exist.");
mdt_object_unlock(info, child, lhc, 1);
RETURN(-ENOENT);
}
rc = mdt_getattr_internal(info, child, ma_need);
if (unlikely(rc != 0)) {
mdt_object_unlock(info, child, lhc, 1);
RETURN(rc);
}
rc = mdt_pack_secctx_in_reply(info, child);
if (unlikely(rc)) {
mdt_object_unlock(info, child, lhc, 1);
RETURN(rc);
}
rc = mdt_pack_encctx_in_reply(info, child);
if (unlikely(rc))
mdt_object_unlock(info, child, lhc, 1);
RETURN(rc);
}
lname = &info->mti_name;
mdt_name_unpack(pill, &RMF_NAME, lname, MNF_FIX_ANON);
if (info->mti_body->mbo_valid & OBD_MD_NAMEHASH) {
reqbody = req_capsule_client_get(pill, &RMF_MDT_BODY);
if (unlikely(reqbody == NULL))
RETURN(err_serious(-EPROTO));
*child_fid = reqbody->mbo_fid2;
if (unlikely(!fid_is_sane(child_fid)))
RETURN(err_serious(-EINVAL));
if (lu_fid_eq(mdt_object_fid(parent), child_fid)) {
mdt_object_get(info->mti_env, parent);
child = parent;
} else {
child = mdt_object_find(info->mti_env, info->mti_mdt,
child_fid);
if (IS_ERR(child))
RETURN(PTR_ERR(child));
}
CDEBUG(D_INODE, "getattr with lock for "DFID"/"DFID", ldlm_rep = %p\n",
PFID(mdt_object_fid(parent)),
PFID(&reqbody->mbo_fid2), ldlm_rep);
} else if (lu_name_is_valid(lname)) {
if (mdt_object_remote(parent)) {
CERROR("%s: parent "DFID" is on remote target\n",
mdt_obd_name(info->mti_mdt),
PFID(mdt_object_fid(parent)));
RETURN(-EPROTO);
}
CDEBUG(D_INODE, "getattr with lock for "DFID"/"DNAME", ldlm_rep = %p\n",
PFID(mdt_object_fid(parent)),
encode_fn_luname(lname), ldlm_rep);
if (parent->mot_obj.lo_header->loh_attr & LOHA_FSCRYPT_MD ||
(fid_is_root(mdt_object_fid(parent)) &&
lname->ln_namelen == strlen(dot_fscrypt_name) &&
strncmp(lname->ln_name, dot_fscrypt_name,
lname->ln_namelen) == 0))
fscrypt_md = true;
} else {
reqbody = req_capsule_client_get(pill, &RMF_MDT_BODY);
if (unlikely(reqbody == NULL))
RETURN(err_serious(-EPROTO));
*child_fid = reqbody->mbo_fid2;
if (unlikely(!fid_is_sane(child_fid)))
RETURN(err_serious(-EINVAL));
if (lu_fid_eq(mdt_object_fid(parent), child_fid)) {
mdt_object_get(info->mti_env, parent);
child = parent;
} else {
child = mdt_object_find(info->mti_env, info->mti_mdt,
child_fid);
if (IS_ERR(child))
RETURN(PTR_ERR(child));
}
if (mdt_object_remote(child)) {
CERROR("%s: child "DFID" is on remote target\n",
mdt_obd_name(info->mti_mdt),
PFID(mdt_object_fid(child)));
GOTO(out_child, rc = -EPROTO);
}
/* don't fetch LOOKUP lock if it's remote object */
rc = mdt_is_remote_object(info, parent, child);
if (rc < 0)
GOTO(out_child, rc);
if (rc)
child_bits &= ~MDS_INODELOCK_LOOKUP;
CDEBUG(D_INODE, "getattr with lock for "DFID"/"DFID", ldlm_rep = %p\n",
PFID(mdt_object_fid(parent)),
PFID(&reqbody->mbo_fid2), ldlm_rep);
}
mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_EXECD);
if (unlikely(!mdt_object_exists(parent)) &&
!(info->mti_body->mbo_valid & OBD_MD_NAMEHASH) &&
lu_name_is_valid(lname)) {
LU_OBJECT_DEBUG(D_INODE, info->mti_env,
&parent->mot_obj,
"Parent doesn't exist!");
GOTO(out_child, rc = -ESTALE);
}
if (!child && is_resent) {
lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
if (lock == NULL) {
/* Lock is pinned by ldlm_handle_enqueue0() as it is
* a resend case, however, it could be already destroyed
* due to client eviction or a raced cancel RPC.
*/
LDLM_DEBUG_NOLOCK("Invalid lock handle %#llx",
lhc->mlh_reg_lh.cookie);
RETURN(-ESTALE);
}
fid_extract_from_res_name(child_fid,
&lock->l_resource->lr_name);
ldlm_lock_put(lock);
child = mdt_object_find(info->mti_env, info->mti_mdt,
child_fid);
if (IS_ERR(child))
RETURN(PTR_ERR(child));
} else if (!(info->mti_body->mbo_valid & OBD_MD_NAMEHASH) &&
lu_name_is_valid(lname)) {
if (info->mti_body->mbo_valid == OBD_MD_FLID) {
rc = mdt_raw_lookup(info, parent, lname);
RETURN(rc);
}
/* step 1: lock parent only if parent is a directory */
if (S_ISDIR(lu_object_attr(&parent->mot_obj))) {
lhp = &info->mti_lh[MDT_LH_PARENT];
rc = mdt_parent_lock(info, parent, lhp, lname, LCK_PR);
if (unlikely(rc != 0))
RETURN(rc);
}
/* step 2: lookup child's fid by name */
fid_zero(child_fid);
rc = mdo_lookup(info->mti_env, mdt_object_child(parent), lname,
child_fid, &info->mti_spec);
if (rc == -ENOENT)
mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_NEG);
if (rc != 0)
GOTO(unlock_parent, rc);
child = mdt_object_find(info->mti_env, info->mti_mdt,
child_fid);
if (unlikely(IS_ERR(child)))
GOTO(unlock_parent, rc = PTR_ERR(child));
}
mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
/* step 3: lock child regardless if it is local or remote. */
LASSERT(child);
if (info->mti_body->mbo_valid & OBD_MD_NAMEHASH) {
/* Here, lname is an encoded hash of on-disk name, and
* client is doing access without encryption key.
* So we need to compare name hash with the one in the request.
*/
if (!find_name_matching_hash(info, lname, parent,
child)) {
mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_NEG);
mdt_clear_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
GOTO(out_child, rc = -ENOENT);
}
}
CFS_FAIL_TIMEOUT(OBD_FAIL_MDS_RESEND, obd_timeout * 2);
if (!mdt_object_exists(child)) {
LU_OBJECT_DEBUG(D_INODE, info->mti_env,
&child->mot_obj,
"Object doesn't exist!");
GOTO(out_child, rc = -ENOENT);
}
rc = mdt_check_resent_lock(info, child, lhc);
if (rc < 0) {
GOTO(out_child, rc);
} else if (rc > 0) {
bool hardlink_check = lhp && info->mti_batch_env &&
S_ISREG(lu_object_attr(&child->mot_obj));
if ((!(child_bits & MDS_INODELOCK_UPDATE) &&
!mdt_object_remote(child)) || hardlink_check) {
struct md_attr *ma = &info->mti_attr;
ma->ma_valid = 0;
ma->ma_need = MA_INODE;
rc = mdt_attr_get_complex(info, child, ma);
if (unlikely(rc != 0))
GOTO(out_child, rc);
/*
* There is a possible deadlock between link() and batch
* stat-ahead on hardlinks.
* link()
* - Take parent DLM lock: mdt_parent_lock PW
* - Take object DLM lock: mdt_object_lock EX
* batch stat-ahead
* - Already hold the DLM lock on one link of the
* object which will return to the client in previous
* stat operation on MDT.
* - Take parent DLM lock: mdt_parent_lock PR
*
* Deadlock:
* The link operation, which is holding the parent PW
* lock, is waiting for the batch stat-ahead to release
* the DLM lock on one link of the file.
* The batch statahead, which is holding the DLM lock on
* the file in the previous sub stat operation in the
* batch RPC, currently is trying to acquire the PR DLM
* lock on the parent.
* To avoid this deadlock, we simply cancel the
* statahead on the hardlink in a batch RPC.
* Without this fix, it failed lustre-rsync-test/test_6.
*/
if (hardlink_check && (ma->ma_valid & MA_INODE) &&
(ma->ma_attr.la_valid & LA_NLINK) &&
ma->ma_attr.la_nlink > 1)
GOTO(out_child, rc = -ECANCELED);
/* If the file has not been changed for some time, we
* return not only a LOOKUP lock, but also an UPDATE
* lock and this might save us RPC on later STAT. For
* directories, it also let negative dentry cache start
* working for this dir.
*/
if (ma->ma_valid & MA_INODE &&
ma->ma_attr.la_valid & LA_CTIME &&
info->mti_mdt->mdt_namespace->ns_ctime_age_limit +
ma->ma_attr.la_ctime < ktime_get_real_seconds())
child_bits |= MDS_INODELOCK_UPDATE;
}
/* layout lock must be granted in a best-effort way
* for IT operations
*/
LASSERT(!(child_bits & MDS_INODELOCK_LAYOUT));
if (S_ISREG(lu_object_attr(&child->mot_obj)) &&
!mdt_object_remote(child) && ldlm_rep != NULL) {
if (!CFS_FAIL_CHECK(OBD_FAIL_MDS_NO_LL_GETATTR) &&
exp_connect_layout(info->mti_exp)) {
/* try to grant layout lock for regular file. */
try_bits = MDS_INODELOCK_LAYOUT;
}
/* Acquire DOM lock in advance for data-on-mdt file */
if (child != parent)
try_bits |= MDS_INODELOCK_DOM;
}
/*
* To avoid possible deadlock between batched statahead RPC
* and rename()/migrate() operation, it should use trylock to
* obtain the DLM PR ibits lock for file attributes in a
* batched statahead RPC. A failed trylock means that other
* users maybe modify the directory simultaneously as in current
* Lustre design the server only grants read lock to a client.
*
* When a trylock failed, the MDT reports the conflict with
* error code -EBUSY, and stops statahead immediately.
*/
if (info->mti_batch_env) {
/*
* This is a sub stat-ahead request in a batched RPC.
* However, the @child is a remote object, we just
* return -EREMOTE here to forbid stat-ahead on it.
*/
if (mdt_object_remote(child))
GOTO(out_child, rc = -EREMOTE);
try_bits |= child_bits;
child_bits = 0;
}
if (try_bits != MDS_INODELOCK_NONE) {
/* try layout lock, it may fail to be granted due to
* contention at LOOKUP or UPDATE
*/
rc = mdt_object_lock_try(info, child, lhc, &child_bits,
try_bits, LCK_PR);
if (child_bits & MDS_INODELOCK_LAYOUT)
ma_need |= MA_LOV;
} else {
/* Do not enqueue the UPDATE lock from MDT(cross-MDT),
* client will enqueue the lock to the remote MDT
*/
if (mdt_object_remote(child))
rc = mdt_object_lookup_lock(info, NULL, child,
lhc, LCK_PR);
else
rc = mdt_object_lock(info, child, lhc,
child_bits, LCK_PR);
}
if (unlikely(rc != 0))
GOTO(out_child, rc);
if (info->mti_batch_env && child_bits == 0) {
if (!is_resent)
mdt_object_unlock(info, child, lhc, 1);
GOTO(out_child, rc = -EBUSY);
}
}
if (fscrypt_md)
child->mot_obj.lo_header->loh_attr |= LOHA_FSCRYPT_MD;
/* finally, we can get attr for child. */
rc = mdt_getattr_internal(info, child, ma_need);
if (unlikely(rc != 0)) {
if (!is_resent)
mdt_object_unlock(info, child, lhc, 1);
GOTO(out_child, rc);
}
rc = mdt_pack_secctx_in_reply(info, child);
if (unlikely(rc)) {
if (!is_resent)
mdt_object_unlock(info, child, lhc, 1);
GOTO(out_child, rc);
}
rc = mdt_pack_encctx_in_reply(info, child);
if (unlikely(rc)) {
if (!is_resent)
mdt_object_unlock(info, child, lhc, 1);
GOTO(out_child, rc);
}
lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
if (lock) {
/* Debugging code. */
LDLM_DEBUG(lock, "Returning lock to client");
LASSERTF(fid_res_name_eq(mdt_object_fid(child),
&lock->l_resource->lr_name),
"Lock res_id: "DLDLMRES", fid: "DFID"\n",
PLDLMRES(lock->l_resource),
PFID(mdt_object_fid(child)));
if (unlikely(CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_ENQ_RESEND))) {
if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))
CFS_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_ENQ_RESEND,
req->rq_deadline -
req->rq_arrival_time.tv_sec +
cfs_fail_val ?: 3);
/* Put the lock to the waiting list and force the cancel */
(lock->l_flags |= LDLM_FL_AST_SENT);
}
/*
* check whether the object is remote as we can't
* really check attributes w/o explicit check for
* object's existence first.
*/
if (!mdt_object_remote(child) && child != parent &&
S_ISREG(lu_object_attr(&child->mot_obj))) {
mdt_object_put(info->mti_env, child);
rc = mdt_pack_size2body(info, child_fid,
&lhc->mlh_reg_lh);
if (rc != 0 && child_bits & MDS_INODELOCK_DOM) {
/* DOM lock was taken in advance but this is
* not DoM file. Drop the lock.
*/
lock_res_and_lock(lock);
ldlm_inodebits_drop(lock, MDS_INODELOCK_DOM);
unlock_res_and_lock(lock);
}
ldlm_lock_put(lock);
GOTO(unlock_parent, rc = 0);
}
ldlm_lock_put(lock);
}
EXIT;
out_child:
if (child)
mdt_object_put(info->mti_env, child);
unlock_parent:
if (lhp)
mdt_object_unlock(info, parent, lhp, 1);
if (rc == -ENOENT) {
/* return -ENOKEY instead of -ENOENT to encryption-unaware
* client if trying to access an encrypted file
*/
int rc2 = mdt_check_enc(info, parent);
if (rc2)
rc = rc2;
}
return rc;
}
/* normal handler: should release the child lock */
static int mdt_getattr_name(struct tgt_session_info *tsi)
{
struct mdt_thread_info *info = tsi2mdt_info(tsi);
struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_CHILD];
struct mdt_body *reqbody;
struct mdt_body *repbody;
int rc, rc2;
ENTRY;
reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
LASSERT(reqbody != NULL);
repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
LASSERT(repbody != NULL);
info->mti_cross_ref = !!(reqbody->mbo_valid & OBD_MD_FLCROSSREF);
repbody->mbo_eadatasize = 0;
repbody->mbo_aclsize = 0;
rc = mdt_init_ucred(info, reqbody);
if (unlikely(rc))
GOTO(out_shrink, rc);
rc = mdt_getattr_name_lock(info, lhc, MDS_INODELOCK_UPDATE, NULL);
if (lustre_handle_is_used(&lhc->mlh_reg_lh)) {
ldlm_lock_decref(&lhc->mlh_reg_lh, lhc->mlh_reg_mode);
lhc->mlh_reg_lh.cookie = 0;
}
mdt_exit_ucred(info);
EXIT;
out_shrink:
mdt_client_compatibility(info);
rc2 = mdt_fix_reply(info);
if (rc == 0)
rc = rc2;
mdt_thread_info_fini(info);
return rc;
}
static int mdt_rmfid_unlink(struct mdt_thread_info *info,
const struct lu_fid *pfid,
const struct lu_name *name,
struct mdt_object *obj, s64 ctime)
{
struct lu_fid *child_fid = &info->mti_tmp_fid1;
struct ldlm_enqueue_info *einfo = &info->mti_einfo;
struct mdt_device *mdt = info->mti_mdt;
struct md_attr *ma = &info->mti_attr;
struct mdt_lock_handle *parent_lh;
struct mdt_lock_handle *child_lh;
struct mdt_object *pobj;
int rc;
ENTRY;
pobj = mdt_object_find(info->mti_env, mdt, pfid);
if (IS_ERR(pobj))
GOTO(out, rc = PTR_ERR(pobj));
parent_lh = &info->mti_lh[MDT_LH_PARENT];
rc = mdt_parent_lock(info, pobj, parent_lh, name, LCK_PW);
if (rc != 0)
GOTO(put_parent, rc);
rc = mdo_lookup(info->mti_env, mdt_object_child(pobj),
name, child_fid, &info->mti_spec);
if (rc != 0)
GOTO(unlock_parent, rc);
if (!lu_fid_eq(child_fid, mdt_object_fid(obj)))
GOTO(unlock_parent, rc = -EREMCHG);
child_lh = &info->mti_lh[MDT_LH_CHILD];
rc = mdt_object_stripes_lock(info, pobj, obj, child_lh, einfo,
MDS_INODELOCK_LOOKUP |
MDS_INODELOCK_UPDATE, LCK_EX);
if (rc != 0)
GOTO(unlock_parent, rc);
if (atomic_read(&obj->mot_open_count)) {
CDEBUG(D_OTHER, "object "DFID" open, skip\n",
PFID(mdt_object_fid(obj)));
GOTO(unlock_child, rc = -EBUSY);
}
ma->ma_need = 0;
ma->ma_valid = MA_INODE;
ma->ma_attr.la_valid = LA_CTIME;
ma->ma_attr.la_ctime = ctime;
mutex_lock(&obj->mot_lov_mutex);
rc = mdo_unlink(info->mti_env, mdt_object_child(pobj),
mdt_object_child(obj), name, ma, 0);
mutex_unlock(&obj->mot_lov_mutex);
unlock_child:
mdt_object_stripes_unlock(info, obj, child_lh, einfo, 1);
unlock_parent:
mdt_object_unlock(info, pobj, parent_lh, 1);
put_parent:
mdt_object_put(info->mti_env, pobj);
out:
RETURN(rc);
}
static int mdt_rmfid_check_permission(struct mdt_thread_info *info,
struct mdt_object *obj)
{
struct lu_ucred *uc = lu_ucred(info->mti_env);
struct md_attr *ma = &info->mti_attr;
struct lu_attr *la = &ma->ma_attr;
int rc = 0;
ENTRY;
ma->ma_need = MA_INODE;
rc = mo_attr_get(info->mti_env, mdt_object_child(obj), ma);
if (rc)
GOTO(out, rc);
if (la->la_flags & LUSTRE_IMMUTABLE_FL)
rc = -EACCES;
/* we want rbac roles to have precedence over any other
* permission or capability checks
*/
if (!uc->uc_rbac_byfid_ops)
RETURN(-EPERM);
if (cap_raised(uc->uc_cap, CAP_DAC_OVERRIDE))
RETURN(0);
if (uc->uc_fsuid == la->la_uid) {
if ((la->la_mode & 0200) == 0)
rc = -EACCES;
} else if (uc->uc_fsgid == la->la_gid) {
if ((la->la_mode & 0020) == 0)
rc = -EACCES;
} else if ((la->la_mode & 0002) == 0) {
rc = -EACCES;
}
out:
RETURN(rc);
}
static int mdt_rmfid_one(struct mdt_thread_info *info, struct lu_fid *fid,
s64 ctime)
{
struct mdt_device *mdt = info->mti_mdt;
struct mdt_object *obj = NULL;
struct linkea_data ldata = { NULL };
struct lu_buf *buf = &info->mti_big_buf;
struct lu_name *name = &info->mti_name;
struct lu_fid *pfid = &info->mti_tmp_fid1;
struct link_ea_header *leh;
struct link_ea_entry *lee;
int reclen, count, rc = 0;
ENTRY;
if (!fid_is_sane(fid))
GOTO(out, rc = -EINVAL);
if (!fid_is_namespace_visible(fid))
GOTO(out, rc = -EINVAL);
obj = mdt_object_find(info->mti_env, mdt, fid);
if (IS_ERR(obj))
GOTO(out, rc = PTR_ERR(obj));
if (mdt_object_remote(obj))
GOTO(out, rc = -EREMOTE);
if (!mdt_object_exists(obj) || lu_object_is_dying(&obj->mot_header))
GOTO(out, rc = -ENOENT);
rc = mdt_rmfid_check_permission(info, obj);
if (rc)
GOTO(out, rc);
/* take LinkEA */
buf = lu_buf_check_and_alloc(buf, PATH_MAX);
if (!buf->lb_buf)
GOTO(out, rc = -ENOMEM);
ldata.ld_buf = buf;
rc = mdt_links_read(info, obj, &ldata);
if (rc)
GOTO(out, rc);
leh = buf->lb_buf;
lee = (struct link_ea_entry *)(leh + 1);
for (count = 0; count < leh->leh_reccount; count++) {
/* remove every hardlink */
linkea_entry_unpack(lee, &reclen, name, pfid);
lee = (struct link_ea_entry *) ((char *)lee + reclen);
rc = mdt_rmfid_unlink(info, pfid, name, obj, ctime);
if (rc)
break;
}
out:
if (obj && !IS_ERR(obj))
mdt_object_put(info->mti_env, obj);
if (info->mti_big_buf.lb_buf)
lu_buf_free(&info->mti_big_buf);
RETURN(rc);
}
static int mdt_rmfid(struct tgt_session_info *tsi)
{
struct mdt_thread_info *mti = tsi2mdt_info(tsi);
struct mdt_body *reqbody;
struct lu_fid *fids, *rfids;
int bufsize, rc;
__u32 *rcs;
int i, nr;
ENTRY;
reqbody = req_capsule_client_get(tsi->tsi_pill, &RMF_MDT_BODY);
if (reqbody == NULL)
RETURN(-EPROTO);
bufsize = req_capsule_get_size(tsi->tsi_pill, &RMF_FID_ARRAY,
RCL_CLIENT);
nr = bufsize / sizeof(struct lu_fid);
if (nr * sizeof(struct lu_fid) != bufsize)
RETURN(-EINVAL);
req_capsule_set_size(tsi->tsi_pill, &RMF_RCS,
RCL_SERVER, nr * sizeof(__u32));
req_capsule_set_size(tsi->tsi_pill, &RMF_FID_ARRAY,
RCL_SERVER, nr * sizeof(struct lu_fid));
rc = req_capsule_server_pack(tsi->tsi_pill);
if (rc)
GOTO(out, rc = err_serious(rc));
fids = req_capsule_client_get(tsi->tsi_pill, &RMF_FID_ARRAY);
if (fids == NULL)
RETURN(-EPROTO);
rcs = req_capsule_server_get(tsi->tsi_pill, &RMF_RCS);
LASSERT(rcs);
rfids = req_capsule_server_get(tsi->tsi_pill, &RMF_FID_ARRAY);
LASSERT(rfids);
mdt_init_ucred(mti, reqbody);
for (i = 0; i < nr; i++) {
rfids[i] = fids[i];
rcs[i] = mdt_rmfid_one(mti, fids + i, reqbody->mbo_ctime);
}
mdt_exit_ucred(mti);
out:
RETURN(rc);
}
static int mdt_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
void *karg, void __user *uarg);
int mdt_io_set_info(struct tgt_session_info *tsi)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
struct ost_body *body = NULL, *repbody;
bool is_grant_shrink;
int keylen, rc = 0;
void *key;
ENTRY;
key = req_capsule_client_get(tsi->tsi_pill, &RMF_SETINFO_KEY);
if (key == NULL) {
DEBUG_REQ(D_HA, req, "no set_info key");
RETURN(err_serious(-EFAULT));
}
keylen = req_capsule_get_size(tsi->tsi_pill, &RMF_SETINFO_KEY,
RCL_CLIENT);
is_grant_shrink = KEY_IS(KEY_GRANT_SHRINK);
if (is_grant_shrink)
/* In this case the value is actually an RMF_OST_BODY, so we
* transmutate the type of this PTLRPC
*/
req_capsule_extend(tsi->tsi_pill, &RQF_OST_SET_GRANT_INFO);
rc = req_capsule_server_pack(tsi->tsi_pill);
if (rc < 0)
RETURN(rc);
if (is_grant_shrink) {
body = req_capsule_client_get(tsi->tsi_pill, &RMF_OST_BODY);
repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
*repbody = *body;
/** handle grant shrink, similar to a read request */
tgt_grant_prepare_read(tsi->tsi_env, tsi->tsi_exp,
&repbody->oa);
} else {
CERROR("%s: Unsupported key %s\n",
tgt_name(tsi->tsi_tgt), (char *)key);
rc = -EOPNOTSUPP;
}
RETURN(rc);
}
static int mdt_set_info(struct tgt_session_info *tsi)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
struct obd_export *exp = req->rq_export;
char *key;
void *val;
int keylen, vallen, rc = 0;
ENTRY;
key = req_capsule_client_get(tsi->tsi_pill, &RMF_SETINFO_KEY);
if (key == NULL) {
DEBUG_REQ(D_HA, req, "no set_info key");
RETURN(err_serious(-EFAULT));
}
keylen = req_capsule_get_size(tsi->tsi_pill, &RMF_SETINFO_KEY,
RCL_CLIENT);
val = req_capsule_client_get(tsi->tsi_pill, &RMF_SETINFO_VAL);
if (val == NULL) {
DEBUG_REQ(D_HA, req, "no set_info val");
RETURN(err_serious(-EFAULT));
}
vallen = req_capsule_get_size(tsi->tsi_pill, &RMF_SETINFO_VAL,
RCL_CLIENT);
/* Swab any part of val you need to here */
if (KEY_IS(KEY_READ_ONLY)) {
/* If client wants rw, make sure nodemap does not enforce ro. */
if (!*(__u32 *)val) {
struct lu_nodemap *nm = NULL;
bool readonly = false;
if (exp)
nm = nodemap_get_from_exp(exp);
if (!IS_ERR_OR_NULL(nm)) {
readonly = nm->nmf_readonly_mount;
nodemap_putref(nm);
}
if (unlikely(readonly))
RETURN(-EROFS);
}
spin_lock(&exp->exp_lock);
if (*(__u32 *)val)
*exp_connect_flags_ptr(exp) |= OBD_CONNECT_RDONLY;
else
*exp_connect_flags_ptr(exp) &= ~OBD_CONNECT_RDONLY;
spin_unlock(&exp->exp_lock);
} else if (KEY_IS(KEY_CHANGELOG_CLEAR)) {
struct changelog_setinfo *cs = val;
if (vallen != sizeof(*cs)) {
CERROR("%s: bad changelog_clear setinfo size %d\n",
tgt_name(tsi->tsi_tgt), vallen);
RETURN(-EINVAL);
}
if (req_capsule_req_need_swab(&req->rq_pill)) {
__swab64s(&cs->cs_recno);
__swab32s(&cs->cs_id);
}
if (!mdt_changelog_allow(tsi2mdt_info(tsi), exp))
RETURN(-EACCES);
rc = mdt_iocontrol(OBD_IOC_CHANGELOG_CLEAR, exp,
vallen, val, NULL);
} else if (KEY_IS(KEY_EVICT_BY_NID)) {
if (vallen > 0)
obd_export_evict_by_nid(exp->exp_obd, val);
} else {
RETURN(-EINVAL);
}
RETURN(rc);
}
static int mdt_readpage(struct tgt_session_info *tsi)
{
struct mdt_thread_info *info = mdt_th_info(tsi->tsi_env);
struct mdt_object *object = mdt_obj(tsi->tsi_corpus);
struct lu_rdpg *rdpg = &info->mti_u.rdpg.mti_rdpg;
const struct mdt_body *reqbody = tsi->tsi_mdt_body;
struct mdt_body *repbody;
int rc;
int i;
ENTRY;
if (CFS_FAIL_CHECK(OBD_FAIL_MDS_READPAGE_PACK))
RETURN(err_serious(-ENOMEM));
repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_MDT_BODY);
if (repbody == NULL || reqbody == NULL)
RETURN(err_serious(-EFAULT));
/*
* prepare @rdpg before calling lower layers and transfer itself. Here
* reqbody->size contains offset of where to start to read and
* reqbody->nlink contains number bytes to read.
*/
rdpg->rp_hash = reqbody->mbo_size;
if (rdpg->rp_hash != reqbody->mbo_size) {
CERROR("Invalid hash: %#llx != %#llx\n",
rdpg->rp_hash, reqbody->mbo_size);
RETURN(-EFAULT);
}
rdpg->rp_attrs = reqbody->mbo_mode;
if (exp_connect_flags(tsi->tsi_exp) & OBD_CONNECT_64BITHASH)
rdpg->rp_attrs |= LUDA_64BITHASH;
rdpg->rp_count = min_t(unsigned int, reqbody->mbo_nlink,
exp_max_brw_size(tsi->tsi_exp));
rdpg->rp_npages = (rdpg->rp_count + PAGE_SIZE - 1) >>
PAGE_SHIFT;
OBD_ALLOC_PTR_ARRAY_LARGE(rdpg->rp_folios, rdpg->rp_npages);
if (rdpg->rp_folios == NULL)
RETURN(-ENOMEM);
for (i = 0; i < rdpg->rp_npages; ++i) {
rdpg->rp_folios[i] = folio_alloc(GFP_NOFS, 0);
if (IS_ERR_OR_NULL(rdpg->rp_folios[i])) {
rdpg->rp_folios[i] = NULL;
GOTO(free_rdpg, rc = -ENOMEM);
}
}
/* call lower layers to fill allocated pages with directory data */
rc = mo_readpage(tsi->tsi_env, mdt_object_child(object), rdpg);
if (rc < 0)
GOTO(free_rdpg, rc);
/* send pages to client */
rc = tgt_sendpage(tsi, rdpg, rc);
EXIT;
free_rdpg:
for (i = 0; i < rdpg->rp_npages; i++)
if (rdpg->rp_folios[i])
folio_put(rdpg->rp_folios[i]);
OBD_FREE_PTR_ARRAY_LARGE(rdpg->rp_folios, rdpg->rp_npages);
if (CFS_FAIL_CHECK(OBD_FAIL_MDS_SENDPAGE))
RETURN(0);
return rc;
}
static int mdt_fix_attr_ucred(struct mdt_thread_info *info, __u32 op)
{
struct lu_ucred *uc = mdt_ucred_check(info);
struct lu_attr *attr = &info->mti_attr.ma_attr;
if (uc == NULL)
return -EINVAL;
if (op != REINT_SETATTR) {
if ((attr->la_valid & LA_UID) && (attr->la_uid != -1))
attr->la_uid = uc->uc_fsuid;
/* for S_ISGID, inherit gid from his parent, such work will be
* done in cmm/mdd layer, here set all cases as uc->uc_fsgid.
*/
if ((attr->la_valid & LA_GID) && (attr->la_gid != -1))
attr->la_gid = uc->uc_fsgid;
}
return 0;
}
static inline bool mdt_is_readonly_open(struct mdt_thread_info *info, __u32 op)
{
return op == REINT_OPEN &&
!(info->mti_spec.sp_cr_flags & (MDS_FMODE_WRITE | MDS_OPEN_CREAT));
}
static void mdt_preset_secctx_size(struct mdt_thread_info *info)
{
struct req_capsule *pill = info->mti_pill;
if (req_capsule_has_field(pill, &RMF_FILE_SECCTX,
RCL_SERVER) &&
req_capsule_has_field(pill, &RMF_FILE_SECCTX_NAME,
RCL_CLIENT)) {
if (req_capsule_get_size(pill, &RMF_FILE_SECCTX_NAME,
RCL_CLIENT) != 0)
/* pre-set size in server part with max size */
req_capsule_set_size(pill, &RMF_FILE_SECCTX,
RCL_SERVER,
req_capsule_ptlreq(pill) ?
OBD_MAX_DEFAULT_EA_SIZE :
MAX_MD_SIZE_OLD);
else
req_capsule_set_size(pill, &RMF_FILE_SECCTX,
RCL_SERVER, 0);
}
}
int mdt_object_striped(struct mdt_thread_info *mti, struct mdt_object *obj)
{
struct lu_device *bottom_dev;
struct lu_object *bottom_obj;
int rc;
if (!S_ISDIR(obj->mot_header.loh_attr))
return 0;
/* getxattr from bottom obj to avoid reading in shard FIDs */
bottom_dev = dt2lu_dev(mti->mti_mdt->mdt_bottom);
bottom_obj = lu_object_find_slice(mti->mti_env, bottom_dev,
mdt_object_fid(obj), NULL);
if (IS_ERR(bottom_obj))
return PTR_ERR(bottom_obj);
rc = dt_xattr_get(mti->mti_env, lu2dt(bottom_obj), &LU_BUF_NULL,
XATTR_NAME_LMV);
lu_object_put(mti->mti_env, bottom_obj);
return (rc > 0) ? 1 : (rc == -ENODATA) ? 0 : rc;
}
static int mdt_dir_read_on_open(struct mdt_thread_info *info,
struct lustre_handle *lhc)
{
const struct lu_env *env = info->mti_env;
struct lu_rdpg *rdpg = &info->mti_u.rdpg.mti_rdpg;
struct req_capsule *pill = info->mti_pill;
int rc;
struct mdt_body *mbo;
struct mdt_device *mdt = info->mti_mdt;
struct mdt_object *o;
struct ptlrpc_request *req = pill->rc_req;
bool have_lock = false;
struct lu_fid *fid; // dir fid
ENTRY;
if (CFS_FAIL_CHECK(OBD_FAIL_MDS_READPAGE_PACK))
GOTO(out_err, rc = -ENOMEM);
/* client don't want a reply */
if (!req->rq_reqmsg->lm_repsize)
RETURN(0);
if (lustre_handle_is_used(lhc)) {
struct ldlm_lock *lock;
lock = ldlm_handle2lock(lhc);
if (lock) {
have_lock = ldlm_has_update(lock);
ldlm_lock_put(lock);
}
}
if (!have_lock)
GOTO(out_err, rc = 0);
rdpg->rp_hash = 0;
rdpg->rp_attrs = LUDA_FID | LUDA_TYPE;
if (exp_connect_flags(info->mti_exp) & OBD_CONNECT_64BITHASH)
rdpg->rp_attrs |= LUDA_64BITHASH;
rdpg->rp_count = req->rq_reqmsg->lm_repsize;
rdpg->rp_npages = 0;
rc = req_capsule_server_grow(pill, &RMF_NIOBUF_INLINE, rdpg->rp_count);
if (rc != 0)
/* failed to grow data buffer, just exit */
GOTO(out_err, rc = -E2BIG);
/* re-take MDT_BODY and NIOBUF_INLINE buffers after the buffer grow */
mbo = req_capsule_server_get(pill, &RMF_MDT_BODY);
fid = &mbo->mbo_fid1;
if (!fid_is_sane(fid))
GOTO(out_rnb, rc = -EINVAL);
rdpg->rp_data = req_capsule_server_get(pill, &RMF_NIOBUF_INLINE);
if (rdpg->rp_data == NULL)
GOTO(out_rnb, rc = -EPROTO);
o = mdt_object_find(info->mti_env, mdt, fid);
if (IS_ERR(o))
GOTO(out_rnb, rc = PTR_ERR(o));
if (!mdt_object_exists(o) ||
mdt_object_remote(o) ||
mdt_object_striped(info, o))
GOTO(out_put, rc = -ENOENT);
/* call lower layers to fill allocated pages with directory data */
rc = mo_readpage(env, mdt_object_child(o), rdpg);
out_put:
mdt_object_put(env, o);
out_rnb:
if (rc < 0)
req_capsule_shrink(pill, &RMF_NIOBUF_INLINE, 0, RCL_SERVER);
else
req_capsule_shrink(pill, &RMF_NIOBUF_INLINE, rc, RCL_SERVER);
out_err:
if (rc)
CDEBUG(D_INFO, "read dir on open failed with rc = %d\n", rc);
RETURN(0);
}
static int mdt_read_inline(struct mdt_thread_info *info,
struct mdt_lock_handle *lhc)
{
struct req_capsule *pill = info->mti_pill;
struct md_attr *ma = &info->mti_attr;
struct lu_attr *la = &ma->ma_attr;
struct ptlrpc_request *req = pill->rc_req;
int rc = 0;
ENTRY;
if (!req_capsule_field_present(pill, &RMF_NIOBUF_INLINE, RCL_SERVER)) {
/* There is no reply buffers for this field, this means that
* client has no support for data in reply.
*/
RETURN(0);
}
/* client don't want a reply */
if (!req->rq_reqmsg->lm_repsize)
RETURN(0);
if (S_ISREG(la->la_mode))
rc = mdt_dom_read_on_open(info, info->mti_mdt,
&lhc->mlh_reg_lh);
else if (S_ISDIR(la->la_mode))
rc = mdt_dir_read_on_open(info, &lhc->mlh_reg_lh);
return rc;
}
static int mdt_reint_internal(struct mdt_thread_info *info,
struct mdt_lock_handle *lhc,
__u32 op)
{
struct req_capsule *pill = info->mti_pill;
struct mdt_body *repbody;
int rc = 0, rc2;
ENTRY;
rc = mdt_reint_unpack(info, op);
if (rc != 0) {
CERROR("Can't unpack reint, rc %d\n", rc);
RETURN(err_serious(rc));
}
/* check if the file system is set to readonly. O_RDONLY open
* is still allowed even the file system is set to readonly mode
*/
if (mdt_rdonly(info->mti_exp) && !mdt_is_readonly_open(info, op))
RETURN(err_serious(-EROFS));
/* for replay (no_create) lmm is not needed, client has it already */
if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER,
DEF_REP_MD_SIZE);
/* llog cookies are always 0, the field is kept for compatibility */
if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
req_capsule_set_size(pill, &RMF_LOGCOOKIES, RCL_SERVER, 0);
/* Set ACL reply buffer size as LUSTRE_POSIX_ACL_MAX_SIZE_OLD
* by default. If the target object has more ACL entries, then
* enlarge the buffer when necessary.
*/
if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER))
req_capsule_set_size(pill, &RMF_ACL, RCL_SERVER,
LUSTRE_POSIX_ACL_MAX_SIZE_OLD);
mdt_preset_secctx_size(info);
mdt_preset_encctx_size(info);
rc = req_capsule_server_pack(pill);
if (rc != 0) {
CERROR("Can't pack response, rc %d\n", rc);
RETURN(err_serious(rc));
}
if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_SERVER)) {
repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
LASSERT(repbody);
repbody->mbo_eadatasize = 0;
repbody->mbo_aclsize = 0;
}
CFS_FAIL_TIMEOUT(OBD_FAIL_MDS_REINT_DELAY, 10);
/* for replay no cookkie / lmm need, because client have this already */
if (info->mti_spec.no_create)
if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER, 0);
rc = mdt_init_ucred_reint(info);
if (rc)
GOTO(out_shrink, rc);
rc = mdt_fix_attr_ucred(info, op);
if (rc != 0)
GOTO(out_ucred, rc = err_serious(rc));
rc = mdt_check_resent(info, mdt_reconstruct, lhc);
if (rc < 0) {
GOTO(out_ucred, rc);
} else if (rc == 1) {
DEBUG_REQ(D_INODE, mdt_info_req(info), "resent opt");
rc = lustre_msg_get_status(mdt_info_req(info)->rq_repmsg);
GOTO(out_ucred, rc);
}
rc = mdt_reint_rec(info, lhc);
EXIT;
out_ucred:
mdt_exit_ucred(info);
out_shrink:
mdt_client_compatibility(info);
rc2 = mdt_fix_reply(info);
if (rc == 0)
rc = rc2;
/*
* Data-on-MDT optimization - read data along with OPEN and return it
* in reply when possible.
*/
if (rc == 0 && op == REINT_OPEN && !req_is_replay(pill->rc_req))
rc = mdt_read_inline(info, lhc);
return rc;
}
static long mdt_reint_opcode(struct ptlrpc_request *req,
const struct req_format **fmt)
{
struct mdt_device *mdt;
struct mdt_rec_reint *rec;
long opc;
rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
if (rec != NULL) {
opc = rec->rr_opcode;
DEBUG_REQ(D_INODE, req, "reint opt = %ld", opc);
if (opc < REINT_MAX && fmt[opc] != NULL)
req_capsule_extend(&req->rq_pill, fmt[opc]);
else {
mdt = mdt_exp2dev(req->rq_export);
CERROR("%s: Unsupported opcode '%ld' from client '%s': rc = %d\n",
req->rq_export->exp_obd->obd_name,
opc, mdt->mdt_ldlm_client->cli_name, -EFAULT);
opc = err_serious(-EFAULT);
}
} else {
opc = err_serious(-EFAULT);
}
return opc;
}
static int mdt_reint(struct tgt_session_info *tsi)
{
long opc;
int rc;
static const struct req_format *reint_fmts[REINT_MAX] = {
[REINT_SETATTR] = &RQF_MDS_REINT_SETATTR,
[REINT_CREATE] = &RQF_MDS_REINT_CREATE,
[REINT_LINK] = &RQF_MDS_REINT_LINK,
[REINT_UNLINK] = &RQF_MDS_REINT_UNLINK,
[REINT_RENAME] = &RQF_MDS_REINT_RENAME,
[REINT_OPEN] = &RQF_MDS_REINT_OPEN,
[REINT_SETXATTR] = &RQF_MDS_REINT_SETXATTR,
[REINT_RMENTRY] = &RQF_MDS_REINT_UNLINK,
[REINT_MIGRATE] = &RQF_MDS_REINT_MIGRATE,
[REINT_RESYNC] = &RQF_MDS_REINT_RESYNC,
};
ENTRY;
opc = mdt_reint_opcode(tgt_ses_req(tsi), reint_fmts);
if (opc >= 0) {
struct mdt_thread_info *info = tsi2mdt_info(tsi);
/*
* No lock possible here from client to pass it to reint code
* path.
*/
rc = mdt_reint_internal(info, NULL, opc);
mdt_thread_info_fini(info);
} else {
rc = opc;
}
tsi->tsi_reply_fail_id = OBD_FAIL_MDS_REINT_NET_REP;
RETURN(rc);
}
/* this should sync the whole device */
int mdt_device_sync(const struct lu_env *env, struct mdt_device *mdt)
{
struct dt_device *dt = mdt->mdt_bottom;
int rc;
ENTRY;
lu_objects_destroy_delayed();
rc = dt->dd_ops->dt_sync(env, dt);
RETURN(rc);
}
/* this should sync this object */
static int mdt_object_sync(const struct lu_env *env, struct obd_export *exp,
struct mdt_object *mo)
{
int rc = 0;
ENTRY;
if (!mdt_object_exists(mo)) {
CWARN("%s: non existing object "DFID": rc = %d\n",
exp->exp_obd->obd_name, PFID(mdt_object_fid(mo)),
-ESTALE);
RETURN(-ESTALE);
}
if (S_ISREG(lu_object_attr(&mo->mot_obj))) {
struct lu_target *tgt = tgt_ses_info(env)->tsi_tgt;
dt_obj_version_t version;
version = dt_version_get(env, mdt_obj2dt(mo));
if (version > tgt->lut_obd->obd_last_committed)
rc = mo_object_sync(env, mdt_object_child(mo));
} else {
rc = mo_object_sync(env, mdt_object_child(mo));
}
RETURN(rc);
}
static int mdt_sync(struct tgt_session_info *tsi)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
struct req_capsule *pill = tsi->tsi_pill;
struct mdt_body *body;
ktime_t kstart = ktime_get();
int rc;
ENTRY;
if (CFS_FAIL_CHECK(OBD_FAIL_MDS_SYNC_PACK))
RETURN(err_serious(-ENOMEM));
if (fid_seq(&tsi->tsi_mdt_body->mbo_fid1) == 0) {
rc = mdt_device_sync(tsi->tsi_env, mdt_exp2dev(tsi->tsi_exp));
} else {
struct mdt_thread_info *info = tsi2mdt_info(tsi);
if (unlikely(info->mti_object == NULL))
RETURN(-EPROTO);
/* sync an object */
rc = mdt_object_sync(tsi->tsi_env, tsi->tsi_exp,
info->mti_object);
if (rc == 0) {
const struct lu_fid *fid;
struct lu_attr *la = &info->mti_attr.ma_attr;
info->mti_attr.ma_need = MA_INODE;
info->mti_attr.ma_valid = 0;
rc = mdt_attr_get_complex(info, info->mti_object,
&info->mti_attr);
if (rc == 0) {
body = req_capsule_server_get(pill,
&RMF_MDT_BODY);
fid = mdt_object_fid(info->mti_object);
mdt_pack_attr2body(info, body, la, fid);
}
}
mdt_thread_info_fini(info);
}
if (rc == 0)
mdt_counter_incr(req, LPROC_MDT_SYNC,
ktime_us_delta(ktime_get(), kstart));
RETURN(rc);
}
static int mdt_data_sync(struct tgt_session_info *tsi)
{
struct mdt_thread_info *info;
struct mdt_device *mdt = mdt_exp2dev(tsi->tsi_exp);
struct ost_body *body = tsi->tsi_ost_body;
struct ost_body *repbody;
struct mdt_object *mo = NULL;
struct md_attr *ma;
int rc = 0;
ENTRY;
repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
/* device sync is done via MDS_SYNC. NOOP if no fid is specified */
if (fid_is_zero(&tsi->tsi_fid))
RETURN(0);
mo = mdt_object_find(tsi->tsi_env, mdt, &tsi->tsi_fid);
if (IS_ERR(mo))
RETURN(PTR_ERR(mo));
rc = mdt_object_sync(tsi->tsi_env, tsi->tsi_exp, mo);
if (rc)
GOTO(put, rc);
repbody->oa.o_oi = body->oa.o_oi;
repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
info = tsi2mdt_info(tsi);
ma = &info->mti_attr;
ma->ma_need = MA_INODE;
ma->ma_valid = 0;
rc = mdt_attr_get_complex(info, mo, ma);
if (rc == 0)
obdo_from_la(&repbody->oa, &ma->ma_attr, VALID_FLAGS);
else
rc = 0;
mdt_thread_info_fini(info);
EXIT;
put:
if (mo != NULL)
mdt_object_put(tsi->tsi_env, mo);
return rc;
}
/* To get default quotas ID needs to be 0, so
* no reasons to swap this according to nodemap.
*/
static inline bool qmt_need_swap(__u32 cmd)
{
if (cmd == LUSTRE_Q_GETDEFAULT || cmd == LUSTRE_Q_GETDEFAULT_POOL)
return false;
return true;
}
/*
* Handle quota control requests to consult current usage/limit, but also
* to configure quota enforcement
*/
static int mdt_quotactl(struct tgt_session_info *tsi)
{
struct obd_export *exp = tsi->tsi_exp;
struct req_capsule *pill = tsi->tsi_pill;
struct obd_quotactl *oqctl, *repoqc;
struct mdt_device *mdt = mdt_exp2dev(exp);
struct lu_device *qmt = mdt->mdt_qmt_dev;
struct lu_nodemap *nodemap;
char *buffer = NULL;
int id, rc;
ENTRY;
oqctl = req_capsule_client_get(pill, &RMF_OBD_QUOTACTL);
if (!oqctl)
RETURN(err_serious(-EPROTO));
if (oqctl->qc_cmd == LUSTRE_Q_ITERQUOTA ||
oqctl->qc_cmd == LUSTRE_Q_ITEROQUOTA)
req_capsule_set_size(pill, &RMF_OBD_QUOTA_ITER, RCL_SERVER,
LQUOTA_ITER_BUFLEN);
else
req_capsule_set_size(pill, &RMF_OBD_QUOTA_ITER, RCL_SERVER, 0);
rc = req_capsule_server_pack(pill);
if (rc)
RETURN(err_serious(rc));
nodemap = nodemap_get_from_exp(exp);
if (IS_ERR(nodemap))
RETURN(PTR_ERR(nodemap));
switch (oqctl->qc_cmd) {
/* master quotactl */
case Q_SETINFO:
case Q_SETQUOTA:
case LUSTRE_Q_SETDEFAULT:
case LUSTRE_Q_SETQUOTAPOOL:
case LUSTRE_Q_SETINFOPOOL:
case LUSTRE_Q_SETDEFAULT_POOL:
case LUSTRE_Q_SETQUOTALQA:
case LUSTRE_Q_SETINFOLQA:
case LUSTRE_Q_DELETEQID:
case LUSTRE_Q_RESETQID:
if (!nodemap_can_setquota(nodemap, oqctl->qc_cmd,
oqctl->qc_type, oqctl->qc_id))
GOTO(out_nodemap, rc = -EPERM);
fallthrough;
case Q_GETINFO:
case Q_GETQUOTA:
case LUSTRE_Q_GETDEFAULT:
case LUSTRE_Q_GETQUOTAPOOL:
case LUSTRE_Q_GETINFOPOOL:
case LUSTRE_Q_GETQUOTALQA:
case LUSTRE_Q_GETINFOLQA:
case LUSTRE_Q_GETDEFAULT_POOL:
case LUSTRE_Q_ITERQUOTA:
if (qmt == NULL)
GOTO(out_nodemap, rc = -EOPNOTSUPP);
/* slave quotactl */
fallthrough;
case Q_GETOINFO:
case Q_GETOQUOTA:
case LUSTRE_Q_ITEROQUOTA:
break;
default:
rc = -EFAULT;
CERROR("%s: unsupported quotactl command %d: rc = %d\n",
mdt_obd_name(mdt), oqctl->qc_cmd, rc);
GOTO(out_nodemap, rc);
}
id = oqctl->qc_id;
switch (oqctl->qc_type) {
case USRQUOTA:
id = nodemap_map_id(nodemap, NODEMAP_UID,
NODEMAP_CLIENT_TO_FS, id);
break;
case GRPQUOTA:
id = nodemap_map_id(nodemap, NODEMAP_GID,
NODEMAP_CLIENT_TO_FS, id);
break;
case PRJQUOTA:
id = nodemap_map_id(nodemap, NODEMAP_PROJID,
NODEMAP_CLIENT_TO_FS, id);
break;
default:
GOTO(out_nodemap, rc = -EOPNOTSUPP);
}
repoqc = req_capsule_server_get(pill, &RMF_OBD_QUOTACTL);
if (repoqc == NULL)
GOTO(out_nodemap, rc = err_serious(-EFAULT));
if (oqctl->qc_cmd == LUSTRE_Q_ITERQUOTA ||
oqctl->qc_cmd == LUSTRE_Q_ITEROQUOTA) {
buffer = req_capsule_server_get(pill, &RMF_OBD_QUOTA_ITER);
if (buffer == NULL)
GOTO(out_nodemap, rc = err_serious(-EFAULT));
}
if (oqctl->qc_cmd == Q_SETINFO || oqctl->qc_cmd == Q_SETQUOTA)
barrier_exit(tsi->tsi_tgt->lut_bottom);
if (oqctl->qc_id != id && qmt_need_swap(oqctl->qc_cmd))
swap(oqctl->qc_id, id);
if (oqctl->qc_cmd == Q_SETINFO || oqctl->qc_cmd == Q_SETQUOTA) {
if (unlikely(!barrier_entry(tsi->tsi_tgt->lut_bottom)))
GOTO(out_nodemap, -EINPROGRESS);
}
switch (oqctl->qc_cmd) {
case LUSTRE_Q_ITERQUOTA:
rc = lquota_iter_change_qid(nodemap, oqctl);
if (rc)
GOTO(out_nodemap, rc);
fallthrough;
case Q_GETINFO:
case Q_SETINFO:
case Q_SETQUOTA:
case Q_GETQUOTA:
case LUSTRE_Q_SETDEFAULT:
case LUSTRE_Q_GETDEFAULT:
case LUSTRE_Q_SETQUOTAPOOL:
case LUSTRE_Q_GETQUOTAPOOL:
case LUSTRE_Q_SETINFOPOOL:
case LUSTRE_Q_GETINFOPOOL:
case LUSTRE_Q_SETQUOTALQA:
case LUSTRE_Q_GETQUOTALQA:
case LUSTRE_Q_SETINFOLQA:
case LUSTRE_Q_GETINFOLQA:
case LUSTRE_Q_SETDEFAULT_POOL:
case LUSTRE_Q_GETDEFAULT_POOL:
case LUSTRE_Q_DELETEQID:
case LUSTRE_Q_RESETQID:
/* forward quotactl request to QMT */
rc = qmt_hdls.qmth_quotactl(tsi->tsi_env, qmt, nodemap, oqctl,
buffer);
break;
case LUSTRE_Q_ITEROQUOTA:
rc = lquota_iter_change_qid(nodemap, oqctl);
if (rc)
GOTO(out_nodemap, rc);
fallthrough;
case Q_GETOINFO:
case Q_GETOQUOTA:
/* slave quotactl */
rc = lquotactl_slv(tsi->tsi_env, tsi->tsi_tgt->lut_bottom,
nodemap, oqctl, buffer);
break;
default:
CERROR("Unsupported quotactl command: %d\n", oqctl->qc_cmd);
GOTO(out_nodemap, rc = -EFAULT);
}
if (oqctl->qc_id != id && qmt_need_swap(oqctl->qc_cmd))
swap(oqctl->qc_id, id);
QCTL_COPY_NO_PNAME(repoqc, oqctl);
EXIT;
out_nodemap:
nodemap_putref(nodemap);
return rc;
}
/** clone llog ctxt from child (mdd)
* This allows remote llog (replicator) access.
* We can either pass all llog RPCs (eg mdt_llog_create) on to child where the
* context was originally set up, or we can handle them directly.
* I choose the latter, but that means I need any llog
* contexts set up by child to be accessable by the mdt. So we clone the
* context into our context list here.
*/
static int mdt_llog_ctxt_clone(const struct lu_env *env, struct mdt_device *mdt,
int idx)
{
struct md_device *next = mdt->mdt_child;
struct llog_ctxt *ctxt;
int rc;
if (!llog_ctxt_null(mdt2obd_dev(mdt), idx))
return 0;
rc = next->md_ops->mdo_llog_ctxt_get(env, next, idx, (void **)&ctxt);
if (rc || ctxt == NULL)
return 0;
rc = llog_group_set_ctxt(&mdt2obd_dev(mdt)->obd_olg, ctxt, idx);
if (rc)
CERROR("Can't set mdt ctxt %d\n", rc);
return rc;
}
static int mdt_llog_ctxt_unclone(const struct lu_env *env,
struct mdt_device *mdt, int idx)
{
struct llog_ctxt *ctxt;
ctxt = llog_get_context(mdt2obd_dev(mdt), idx);
if (ctxt == NULL)
return 0;
/* Put once for the get we just did, and once for the clone */
llog_ctxt_put(ctxt);
llog_ctxt_put(ctxt);
return 0;
}
/*
* sec context handlers
*/
static int mdt_sec_ctx_handle(struct tgt_session_info *tsi)
{
CFS_FAIL_TIMEOUT(OBD_FAIL_SEC_CTX_HDL_PAUSE, cfs_fail_val);
return 0;
}
/*
* quota request handlers
*/
static int mdt_quota_dqacq(struct tgt_session_info *tsi)
{
struct mdt_device *mdt = mdt_exp2dev(tsi->tsi_exp);
struct lu_device *qmt = mdt->mdt_qmt_dev;
int rc;
ENTRY;
if (qmt == NULL)
RETURN(err_serious(-EOPNOTSUPP));
rc = qmt_hdls.qmth_dqacq(tsi->tsi_env, qmt, tgt_ses_req(tsi));
RETURN(rc);
}
struct mdt_object *mdt_object_new(const struct lu_env *env,
struct mdt_device *d,
const struct lu_fid *f)
{
struct lu_object_conf conf = { .loc_flags = LOC_F_NEW };
struct lu_object *o;
struct mdt_object *m;
ENTRY;
CDEBUG(D_INFO, "Allocate object for "DFID"\n", PFID(f));
o = lu_object_find(env, &d->mdt_lu_dev, f, &conf);
if (unlikely(IS_ERR(o)))
m = (struct mdt_object *)o;
else
m = mdt_obj(o);
RETURN(m);
}
struct mdt_object *mdt_object_find(const struct lu_env *env,
struct mdt_device *d,
const struct lu_fid *f)
{
struct lu_object *o;
struct mdt_object *m;
ENTRY;
/* mdt_orphan_open() gets local ROOT */
if (!fid_is_namespace_visible(f) && !fid_is_local_file(f)) {
CERROR("%s: MDT object FID "DFID" is corrupt: rc = %d\n",
mdt_obd_name(d), PFID(f), -EINVAL);
RETURN(ERR_PTR(-EINVAL));
}
CDEBUG(D_INFO, "Find object for "DFID"\n", PFID(f));
o = lu_object_find(env, &d->mdt_lu_dev, f, NULL);
if (unlikely(IS_ERR(o)))
m = (struct mdt_object *)o;
else
m = mdt_obj(o);
RETURN(m);
}
/**
* Asyncronous commit for mdt device.
*
* Pass asynchonous commit call down the MDS stack.
*
* \param env environment
* \param mdt the mdt device
*/
static void mdt_device_commit_async(const struct lu_env *env,
struct mdt_device *mdt)
{
struct dt_device *dt = mdt->mdt_bottom;
int rc;
ENTRY;
rc = dt->dd_ops->dt_commit_async(env, dt);
if (unlikely(rc != 0))
CWARN("%s: async commit start failed: rc = %d\n",
mdt_obd_name(mdt), rc);
atomic_inc(&mdt->mdt_async_commit_count);
EXIT;
}
/**
* Mark the lock as "synchonous".
*
* Mark the lock to deffer transaction commit to the unlock time.
*
* \param lock the lock to mark as "synchonous"
*
* \see mdt_is_lock_sync
* \see mdt_save_lock
*/
static inline void mdt_set_lock_sync(struct ldlm_lock *lock)
{
lock->l_ast_data = (void *)1;
}
/**
* Check whehter the lock "synchonous" or not.
*
* \param lock the lock to check
* \retval 1 the lock is "synchonous"
* \retval 0 the lock isn't "synchronous"
*
* \see mdt_set_lock_sync
* \see mdt_save_lock
*/
static inline int mdt_is_lock_sync(struct ldlm_lock *lock)
{
return lock->l_ast_data != NULL;
}
/**
* Blocking AST for mdt locks.
*
* Starts transaction commit if in case of COS lock conflict or
* deffers such a commit to the mdt_save_lock.
*
* \param lock the lock which blocks a request or cancelling lock
* \param desc unused
* \param data unused
* \param flag indicates whether this cancelling or blocking callback
* \retval 0
* \see ldlm_blocking_ast_nocheck
*/
int mdt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
void *data, int flag)
{
struct obd_device *obd = ldlm_lock_to_ns(lock)->ns_obd;
struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
struct ldlm_cb_set_arg *arg = data;
bool commit_async = false;
int rc;
ENTRY;
if (flag == LDLM_CB_CANCELING)
RETURN(0);
lock_res_and_lock(lock);
if (lock->l_blocking_ast != mdt_blocking_ast) {
unlock_res_and_lock(lock);
RETURN(0);
}
/* A blocking ast may be sent from ldlm_lock_decref_internal
* when the last reference to a local lock was released and
* during blocking event from ldlm_work_bl_ast_lock().
* The 'data' parameter is l_ast_data in the first case and
* callback arguments in the second one. Distinguish them by that.
*/
if (data && data != lock->l_ast_data && arg->bl_desc) {
if (lock->l_req_mode & (LCK_COS | LCK_TXN))
commit_async = true;
else if ((lock->l_req_mode & (LCK_PW | LCK_EX)) &&
((mdt_cos_is_enabled(mdt) &&
!arg->bl_desc->bl_same_client) ||
(mdt_slc_is_enabled(mdt) &&
arg->bl_desc->bl_txn_dependent)))
mdt_set_lock_sync(lock);
}
rc = ldlm_blocking_ast_nocheck(lock);
if (commit_async) {
struct lu_env env;
rc = lu_env_init(&env, LCT_LOCAL);
if (unlikely(rc != 0))
CWARN("%s: lu_env initialization failed, cannot start asynchronous commit: rc = %d\n",
obd->obd_name, rc);
else
mdt_device_commit_async(&env, mdt);
lu_env_fini(&env);
}
RETURN(rc);
}
/*
* Blocking AST for cross-MDT lock
*
* Discard lock from uncommitted_slc_locks and cancel it.
*
* \param lock the lock which blocks a request or cancelling lock
* \param desc unused
* \param data unused
* \param flag indicates whether this cancelling or blocking callback
* \retval 0 on success
* \retval negative number on error
*/
int mdt_remote_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
void *data, int flag)
{
int rc = 0;
ENTRY;
switch (flag) {
case LDLM_CB_BLOCKING: {
struct lustre_handle lockh;
ldlm_lock2handle(lock, &lockh);
rc = ldlm_cli_cancel(&lockh,
(lock->l_flags & LDLM_FL_ATOMIC_CB) ? 0 : LCF_ASYNC);
if (rc < 0) {
CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
RETURN(rc);
}
break;
}
case LDLM_CB_CANCELING: {
struct obd_device *obd = ldlm_lock_to_ns(lock)->ns_obd;
struct mdt_device *mdt =
mdt_dev(obd->obd_lu_dev->ld_site->ls_top_dev);
LDLM_DEBUG(lock, "Revoke remote lock");
/* discard slc lock here so that it can be cleaned anytime,
* especially for cleanup_resource()
*/
tgt_discard_slc_lock(&mdt->mdt_lut, lock);
/* once we cache lock, l_ast_data is set to mdt_object */
if (lock->l_ast_data != NULL) {
struct mdt_object *mo = lock->l_ast_data;
struct lu_env env;
rc = lu_env_init(&env, LCT_MD_THREAD);
if (unlikely(rc != 0)) {
CWARN("%s: lu_env initialization failed, object %p "DFID" is leaked!: rc = %d\n",
obd->obd_name, mo,
PFID(mdt_object_fid(mo)), rc);
RETURN(rc);
}
if (lock->l_policy_data.l_inodebits.bits &
(MDS_INODELOCK_XATTR | MDS_INODELOCK_UPDATE)) {
rc = mo_invalidate(&env, mdt_object_child(mo));
mo->mot_cache_attr = 0;
}
mdt_object_put(&env, mo);
lu_env_fini(&env);
}
break;
}
default:
LBUG();
}
RETURN(rc);
}
int mdt_check_resent_lock(struct mdt_thread_info *info,
struct mdt_object *mo,
struct mdt_lock_handle *lhc)
{
/* the lock might already be gotten in ldlm_handle_enqueue() */
if (unlikely(lustre_handle_is_used(&lhc->mlh_reg_lh))) {
struct ptlrpc_request *req = mdt_info_req(info);
struct ldlm_lock *lock;
lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
LASSERT(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT);
if (lock == NULL) {
/* Lock is pinned by ldlm_handle_enqueue0() as it is
* a resend case, however, it could be already destroyed
* due to client eviction or a raced cancel RPC.
*/
LDLM_DEBUG_NOLOCK("Invalid lock handle %#llx",
lhc->mlh_reg_lh.cookie);
RETURN(-ESTALE);
}
if (!fid_res_name_eq(mdt_object_fid(mo),
&lock->l_resource->lr_name)) {
CWARN("%s: Although resent, but still not get child lock:"
DFID"\n",
info->mti_exp->exp_obd->obd_name,
PFID(mdt_object_fid(mo)));
ldlm_lock_put(lock);
RETURN(-EPROTO);
}
ldlm_lock_put(lock);
return 0;
}
return 1;
}
static void mdt_remote_object_lock_created_cb(struct ldlm_lock *lock)
{
mdt_object_get(NULL, lock->l_ast_data);
}
static int mdt_remote_object_lock_try(struct mdt_thread_info *mti,
struct mdt_object *obj,
struct lustre_handle *lh,
enum ldlm_mode mode,
union ldlm_policy_data *policy,
struct ldlm_res_id *res_id,
bool cache)
{
struct ldlm_enqueue_info *einfo = &mti->mti_remote_einfo;
int rc;
LASSERT(mdt_object_remote(obj));
memset(einfo, 0, sizeof(*einfo));
einfo->ei_type = LDLM_IBITS;
einfo->ei_mode = mode;
einfo->ei_cb_bl = mdt_remote_blocking_ast;
einfo->ei_cb_cp = ldlm_completion_ast;
einfo->ei_enq_slave = 0;
einfo->ei_res_id = res_id;
einfo->ei_req_slot = 1;
if (cache) {
/*
* if we cache lock, couple lock with mdt_object, so that object
* can be easily found in lock ASTs.
*/
einfo->ei_cbdata = obj;
einfo->ei_cb_created = mdt_remote_object_lock_created_cb;
}
rc = mo_object_lock(mti->mti_env, mdt_object_child(obj), lh, einfo,
policy);
if (rc) {
lh->cookie = 0ull;
return rc;
}
/* other components like LFSCK can use lockless access
* and populate cache, so we better invalidate it
*/
if (policy->l_inodebits.bits &
(MDS_INODELOCK_UPDATE | MDS_INODELOCK_XATTR))
mo_invalidate(mti->mti_env, mdt_object_child(obj));
return 0;
}
/*
* Helper function to take PDO and hash lock.
*
* if \a pdo_lock is false, don't take PDO lock, this is case in rename.
*/
int mdt_object_pdo_lock(struct mdt_thread_info *info, struct mdt_object *obj,
struct mdt_lock_handle *lh, const struct lu_name *name,
enum ldlm_mode mode, bool pdo_lock)
{
struct ldlm_namespace *ns = info->mti_mdt->mdt_namespace;
union ldlm_policy_data *policy = &info->mti_policy;
struct ldlm_res_id *res_id = &info->mti_res_id;
/*
* Do not use LDLM_FL_LOCAL_ONLY for parallel lock, it is never going to
* be sent to client and we do not want it slowed down due to possible
* cancels.
*/
__u64 dlmflags = LDLM_FL_ATOMIC_CB;
__u64 *cookie = NULL;
int rc;
LASSERT(obj);
/* check for exists after object is locked */
if (!mdt_object_exists(obj))
/* Non-existent object shouldn't have PDO lock */
return -ESTALE;
/* Non-dir object shouldn't have PDO lock */
if (!S_ISDIR(lu_object_attr(&obj->mot_obj)))
return -ENOTDIR;
policy->l_inodebits.bits = MDS_INODELOCK_UPDATE;
policy->l_inodebits.try_bits = MDS_INODELOCK_NONE;
policy->l_inodebits.li_gid = 0;
policy->l_inodebits.li_initiator_id = mdt_node_id(info->mti_mdt);
fid_build_reg_res_name(mdt_object_fid(obj), res_id);
if (info->mti_exp)
cookie = &info->mti_exp->exp_handle.h_cookie;
mdt_lock_pdo_init(lh, mode, name);
mdt_lock_pdo_mode(info, obj, lh);
if (lh->mlh_pdo_mode != LCK_NL) {
if (pdo_lock) {
if (mdt_object_remote(obj)) {
rc = mdt_remote_object_lock_try(info, obj,
&lh->mlh_pdo_lh, lh->mlh_pdo_mode,
policy, res_id, false);
lh->mlh_pdo_remote = 1;
} else {
rc = mdt_fid_lock(info->mti_env, ns,
&lh->mlh_pdo_lh, lh->mlh_pdo_mode,
policy, res_id, dlmflags, cookie);
}
if (rc) {
mdt_object_unlock(info, obj, lh, 1);
return rc;
}
}
res_id->name[LUSTRE_RES_ID_HSH_OFF] = lh->mlh_pdo_hash;
}
if (mdt_object_remote(obj))
rc = mdt_remote_object_lock_try(info, obj, &lh->mlh_rreg_lh,
lh->mlh_rreg_mode, policy, res_id, false);
else
rc = mdt_fid_lock(info->mti_env, ns, &lh->mlh_reg_lh,
lh->mlh_reg_mode, policy, res_id, dlmflags, cookie);
if (rc)
mdt_object_unlock(info, obj, lh, 1);
else if (CFS_FAIL_PRECHECK(OBD_FAIL_MDS_PDO_LOCK) &&
lh->mlh_pdo_hash != 0 &&
(lh->mlh_reg_mode == LCK_PW || lh->mlh_reg_mode == LCK_EX))
CFS_FAIL_TIMEOUT(OBD_FAIL_MDS_PDO_LOCK, 15);
return rc;
}
int mdt_object_lock_internal(struct mdt_thread_info *info,
struct mdt_object *obj, const struct lu_fid *fid,
struct mdt_lock_handle *lh,
enum mds_ibits_locks *ibits,
enum mds_ibits_locks trybits,
bool cache)
{
union ldlm_policy_data *policy = &info->mti_policy;
struct ldlm_res_id *res_id = &info->mti_res_id;
struct lustre_handle *handle;
int rc;
/* DoM lock shouln't be combined with other ibits when it is
* taken locally due to potential conflict with GROUP lock.
* Consider trylock either for DoM bit or for others
*/
LASSERT(!(*ibits & MDS_INODELOCK_DOM && *ibits & ~MDS_INODELOCK_DOM));
policy->l_inodebits.bits = *ibits;
policy->l_inodebits.try_bits = trybits;
policy->l_inodebits.li_gid = lh->mlh_gid;
policy->l_inodebits.li_initiator_id = mdt_node_id(info->mti_mdt);
fid_build_reg_res_name(fid, res_id);
if (obj && mdt_object_remote(obj)) {
handle = &lh->mlh_rreg_lh;
LASSERT(!lustre_handle_is_used(handle));
LASSERT(lh->mlh_rreg_mode != LCK_MODE_MIN);
LASSERT(lh->mlh_type != MDT_NUL_LOCK);
rc = mdt_remote_object_lock_try(info, obj, handle,
lh->mlh_rreg_mode, policy,
res_id, cache);
} else {
struct ldlm_namespace *ns = info->mti_mdt->mdt_namespace;
/*
* Use LDLM_FL_LOCAL_ONLY for this lock. We do not know yet if
* it is going to be sent to client. If it is -
* mdt_intent_policy() path will fix it up and turn FL_LOCAL
* flag off.
*/
__u64 dlmflags = LDLM_FL_ATOMIC_CB | LDLM_FL_LOCAL_ONLY;
__u64 *cookie = NULL;
handle = &lh->mlh_reg_lh;
LASSERT(!lustre_handle_is_used(handle));
LASSERT(lh->mlh_reg_mode != LCK_MODE_MIN);
LASSERT(lh->mlh_type != MDT_NUL_LOCK);
/* Lease lock are granted with LDLM_FL_CANCEL_ON_BLOCK */
if (lh->mlh_type == MDT_REG_LOCK &&
lh->mlh_reg_mode == LCK_EX && *ibits == MDS_INODELOCK_OPEN)
dlmflags |= LDLM_FL_CANCEL_ON_BLOCK;
if (info->mti_exp)
cookie = &info->mti_exp->exp_handle.h_cookie;
rc = mdt_fid_lock(info->mti_env, ns, handle, lh->mlh_reg_mode,
policy, res_id, dlmflags, cookie);
if (rc)
mdt_object_unlock(info, obj, lh, 1);
}
if (rc == 0) {
struct ldlm_lock *lock;
/* Return successfully acquired bits to a caller */
lock = ldlm_handle2lock(handle);
LASSERT(lock);
*ibits = lock->l_policy_data.l_inodebits.bits;
ldlm_lock_put(lock);
}
return rc;
}
/*
* MDT object locking functions:
* mdt_object_lock(): lock object, this is used in most places, and normally
* lock ibits doesn't contain LOOKUP, unless the caller knows it's not
* remote object.
* mdt_object_check_lock(): lock object with LOOKUP and other ibits, it needs
* to check whether parent is on remote MDT, if so, take LOOKUP on parent
* MDT separately, and then lock other ibits on child object.
* mdt_parent_lock(): take parent UPDATE lock with specific mode, if parent is
* local, take PDO lock by name hash, otherwise take regular lock.
* mdt_object_stripes_lock(): lock object which should be local, and if it's a
* striped directory, lock its stripes, this is called in operations which
* modify both object and stripes.
* mdt_object_lock_try(): lock object with trybits, the trybits contains
* optional inode lock bits that can be granted. This is called by
* getattr/open to fetch more inode lock bits to client, and is also called
* by dir migration to lock link parent in non-block mode to avoid
* deadlock.
*/
/**
* lock object
*
* this is used to lock object in most places, and normally lock ibits doesn't
* contain LOOKUP, unless the caller knows it's not remote object.
*
* \param info struct mdt_thread_info
* \param obj object
* \param lh lock handle
* \param ibits MDS inode lock bits
* \param mode lock mode
*
* \retval 0 on success, -ev on error.
*/
int mdt_object_lock(struct mdt_thread_info *info, struct mdt_object *obj,
struct mdt_lock_handle *lh, enum mds_ibits_locks ibits,
enum ldlm_mode mode)
{
int rc;
ENTRY;
mdt_lock_reg_init(lh, mode);
rc = mdt_object_lock_internal(info, obj, mdt_object_fid(obj), lh,
&ibits, 0, false);
RETURN(rc);
}
/**
* lock object with LOOKUP and other ibits
*
* it will check whether parent and child are on different MDTs, if so, take
* LOOKUP lock on parent MDT, and lock other ibits on child MDT, otherwise lock
* all ibits on child MDT. Note, parent and child shouldn't be both on remote
* MDTs, in which case specific lock function should be used, and it's in
* rename and migrate only.
*
* \param info struct mdt_thread_info
* \param parent parent object
* \param child child object
* \param lh lock handle
* \param ibits MDS inode lock bits
* \param mode lock mode
*
* \retval 0 on success, -ev on error.
*/
int mdt_object_check_lock(struct mdt_thread_info *info,
struct mdt_object *parent, struct mdt_object *child,
struct mdt_lock_handle *lh,
enum mds_ibits_locks ibits, enum ldlm_mode mode)
{
int rc;
ENTRY;
/* if LOOKUP ibit is not set, use mdt_object_lock() */
LASSERT(ibits & MDS_INODELOCK_LOOKUP);
/* if only LOOKUP ibit is needed, use mdt_object_lookup_lock() */
LASSERT(ibits != MDS_INODELOCK_LOOKUP);
LASSERT(parent);
/* @parent and @child shouldn't both be on remote MDTs */
LASSERT(!(mdt_object_remote(parent) && mdt_object_remote(child)));
mdt_lock_reg_init(lh, mode);
if (mdt_object_remote(parent) ^ mdt_object_remote(child)) {
enum mds_ibits_locks lookup_ibits = MDS_INODELOCK_LOOKUP;
rc = mdt_object_lock_internal(info, parent,
mdt_object_fid(child), lh,
&lookup_ibits, 0, false);
if (rc)
RETURN(rc);
ibits &= ~MDS_INODELOCK_LOOKUP;
}
rc = mdt_object_lock_internal(info, child, mdt_object_fid(child), lh,
&ibits, 0, false);
if (rc && !(ibits & MDS_INODELOCK_LOOKUP))
mdt_object_unlock(info, NULL, lh, 1);
RETURN(rc);
}
/**
* take parent UPDATE lock
*
* if parent is local or mode is LCK_PW, take PDO lock, otherwise take regular
* lock.
*
* \param info struct mdt_thread_info
* \param obj parent object
* \param lh lock handle
* \param lname child name
* \param mode lock mode
*
* \retval 0 on success, -ev on error.
*/
int mdt_parent_lock(struct mdt_thread_info *info, struct mdt_object *obj,
struct mdt_lock_handle *lh, const struct lu_name *lname,
enum ldlm_mode mode)
{
int rc;
ENTRY;
LASSERT(obj && lname);
LASSERT(mode == LCK_PW || mode == LCK_PR);
if (mdt_object_remote(obj) && mode == LCK_PR) {
enum mds_ibits_locks ibits = MDS_INODELOCK_UPDATE;
mdt_lock_reg_init(lh, mode);
rc = mdt_object_lock_internal(info, obj, mdt_object_fid(obj),
lh, &ibits, 0, false);
} else {
rc = mdt_object_pdo_lock(info, obj, lh, lname, mode, true);
}
RETURN(rc);
}
/**
* lock object with trybits
*
* the trybits contains optional inode lock bits that can be granted. This is
* called by getattr/open to fetch more inode lock bits to client, and is also
* called by dir migration to lock link parent in non-block mode to avoid
* deadlock.
*
* \param info struct mdt_thread_info
* \param obj object
* \param lh lock handle
* \param ibits MDS inode lock bits
* \param trybits optional inode lock bits
* \param mode lock mode
*
* \retval 0 on success, -ev on error.
*/
int mdt_object_lock_try(struct mdt_thread_info *info, struct mdt_object *obj,
struct mdt_lock_handle *lh, enum mds_ibits_locks *ibits,
enum mds_ibits_locks trybits, enum ldlm_mode mode)
{
bool trylock_only = *ibits == 0;
int rc;
ENTRY;
LASSERT(!(*ibits & trybits));
mdt_lock_reg_init(lh, mode);
rc = mdt_object_lock_internal(info, obj, mdt_object_fid(obj), lh, ibits,
trybits, false);
if (rc && trylock_only) { /* clear error for try ibits lock only */
LASSERT(*ibits == 0);
rc = 0;
}
RETURN(rc);
}
/*
* Helper function to take \a obj LOOKUP lock.
*
* Both \a pobj and \a obj may be located on remote MDTs.
*/
int mdt_object_lookup_lock(struct mdt_thread_info *info,
struct mdt_object *pobj, struct mdt_object *obj,
struct mdt_lock_handle *lh, enum ldlm_mode mode)
{
enum mds_ibits_locks ibits = MDS_INODELOCK_LOOKUP;
int rc;
ENTRY;
/* if @parent is NULL, it's on local MDT, and @child is remote,
* this is case in getattr/unlink/open by name.
*/
LASSERT(ergo(!pobj, mdt_object_remote(obj)));
mdt_lock_reg_init(lh, mode);
rc = mdt_object_lock_internal(info, pobj, mdt_object_fid(obj), lh,
&ibits, 0, false);
RETURN(rc);
}
/**
* Save a lock within request object.
*
* Keep the lock referenced until whether client ACK or transaction
* commit happens or release the lock immediately depending on input
* parameters. If COS is ON, a write lock is converted to COS lock
* before saving.
*
* \param info thead info object
* \param h lock handle
* \param mode lock mode
* \param decref force immediate lock releasing
*/
static void mdt_save_lock(struct mdt_thread_info *info, struct lustre_handle *h,
enum ldlm_mode mode, int decref)
{
struct tgt_session_info *tsi = info->mti_env->le_ses ?
tgt_ses_info(info->mti_env) : NULL;
ENTRY;
if (lustre_handle_is_used(h)) {
bool has_trans = tsi && tsi->tsi_has_trans;
if (decref || !has_trans || !(mode & (LCK_PW | LCK_EX))) {
mdt_fid_unlock(h, mode);
} else {
struct mdt_device *mdt = info->mti_mdt;
struct ldlm_lock *lock = ldlm_handle2lock(h);
struct ptlrpc_request *req = mdt_info_req(info);
bool no_ack = false;
LASSERTF(lock != NULL, "no lock for cookie %#llx\n",
h->cookie);
/* there is no request if mdt_object_unlock() is called
* from mdt_export_cleanup()->mdt_add_dirty_flag()
*/
if (likely(req != NULL)) {
LDLM_DEBUG(lock, "save lock request %p reply state %p transno %lld",
req,
req->rq_reply_state, req->rq_transno);
if (mdt_cos_is_enabled(mdt)) {
mode = LCK_COS;
no_ack = true;
ldlm_lock_mode_downgrade(lock, mode);
} else if (mdt_slc_is_enabled(mdt)) {
no_ack = true;
if (mode != LCK_TXN) {
mode = LCK_TXN;
ldlm_lock_mode_downgrade(lock,
mode);
}
}
if (req->rq_export->exp_disconnected)
mdt_fid_unlock(h, mode);
else
ptlrpc_save_lock(req, h, no_ack);
} else {
mdt_fid_unlock(h, mode);
}
if (mdt_is_lock_sync(lock)) {
CDEBUG(D_HA, "sync_lock, do async commit\n");
mdt_device_commit_async(info->mti_env, mdt);
}
ldlm_lock_put(lock);
}
h->cookie = 0ull;
}
EXIT;
}
/**
* Save cross-MDT lock in uncommitted_slc_locks
*
* Keep the lock referenced until transaction commit happens or release the lock
* immediately depending on input parameters.
*
* \param info thead info object
* \param h lock handle
* \param mode lock mode
* \param decref force immediate lock releasing
*/
static void mdt_save_remote_lock(struct mdt_thread_info *info,
struct mdt_object *o, struct lustre_handle *h,
enum ldlm_mode mode, int decref)
{
ENTRY;
if (lustre_handle_is_used(h)) {
struct ldlm_lock *lock = ldlm_handle2lock(h);
struct ptlrpc_request *req = mdt_info_req(info);
if (o != NULL &&
(lock->l_policy_data.l_inodebits.bits &
(MDS_INODELOCK_XATTR | MDS_INODELOCK_UPDATE)))
mo_invalidate(info->mti_env, mdt_object_child(o));
if (decref || !req || !(mode & (LCK_PW | LCK_EX)) ||
!tgt_ses_info(info->mti_env)->tsi_has_trans) {
ldlm_lock_decref_and_cancel(h, mode);
ldlm_lock_put(lock);
} else {
tgt_save_slc_lock(&info->mti_mdt->mdt_lut, lock,
req->rq_transno);
ldlm_lock_decref(h, mode);
}
h->cookie = 0ull;
}
EXIT;
}
/**
* Unlock mdt object.
*
* Immeditely release the regular lock and the PDO lock or save the
* lock in request and keep them referenced until client ACK or
* transaction commit.
*
* \param info thread info object
* \param o mdt object
* \param lh mdt lock handle referencing regular and PDO locks
* \param decref force immediate lock releasing
*
* XXX o is not used and may be NULL, see hsm_cdt_request_completed().
*/
void mdt_object_unlock(struct mdt_thread_info *info, struct mdt_object *o,
struct mdt_lock_handle *lh, int decref)
{
ENTRY;
if (lh->mlh_pdo_remote)
mdt_save_remote_lock(info, o, &lh->mlh_pdo_lh,
lh->mlh_pdo_mode, decref);
else
mdt_save_lock(info, &lh->mlh_pdo_lh, lh->mlh_pdo_mode, decref);
mdt_save_lock(info, &lh->mlh_reg_lh, lh->mlh_reg_mode, decref);
mdt_save_remote_lock(info, o, &lh->mlh_rreg_lh, lh->mlh_rreg_mode,
decref);
EXIT;
}
struct mdt_object *mdt_object_find_lock(struct mdt_thread_info *info,
const struct lu_fid *f,
struct mdt_lock_handle *lh,
enum mds_ibits_locks ibits,
enum ldlm_mode mode)
{
struct mdt_object *o;
o = mdt_object_find(info->mti_env, info->mti_mdt, f);
if (!IS_ERR(o)) {
int rc;
rc = mdt_object_lock(info, o, lh, ibits, mode);
if (rc != 0) {
mdt_object_put(info->mti_env, o);
o = ERR_PTR(rc);
}
}
return o;
}
void mdt_object_unlock_put(struct mdt_thread_info *info,
struct mdt_object *o,
struct mdt_lock_handle *lh,
int decref)
{
mdt_object_unlock(info, o, lh, decref);
mdt_object_put(info->mti_env, o);
}
/*
* Generic code handling requests that have struct mdt_body passed in:
*
* - extract mdt_body from request and save it in @info, if present;
*
* - create lu_object, corresponding to the fid in mdt_body, and save it in
* @info;
*
* - if HAS_BODY flag is set for this request type check whether object
* actually exists on storage (lu_object_exists()).
*
*/
static int mdt_body_unpack(struct mdt_thread_info *info,
enum tgt_handler_flags flags)
{
const struct mdt_body *body;
struct mdt_object *obj;
const struct lu_env *env;
struct req_capsule *pill;
int rc;
ENTRY;
env = info->mti_env;
pill = info->mti_pill;
body = info->mti_body = req_capsule_client_get(pill, &RMF_MDT_BODY);
if (body == NULL)
RETURN(-EFAULT);
if (!(body->mbo_valid & OBD_MD_FLID))
RETURN(0);
if (!fid_is_sane(&body->mbo_fid1)) {
CERROR("Invalid fid: "DFID"\n", PFID(&body->mbo_fid1));
RETURN(-EINVAL);
}
obj = mdt_object_find(env, info->mti_mdt, &body->mbo_fid1);
if (!IS_ERR(obj)) {
if ((flags & HAS_BODY) && !mdt_object_exists(obj)) {
mdt_object_put(env, obj);
rc = -ENOENT;
} else {
info->mti_object = obj;
rc = 0;
}
} else
rc = PTR_ERR(obj);
RETURN(rc);
}
static int mdt_unpack_req_pack_rep(struct mdt_thread_info *info,
enum tgt_handler_flags flags)
{
struct req_capsule *pill = info->mti_pill;
int rc;
ENTRY;
if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_CLIENT))
rc = mdt_body_unpack(info, flags);
else
rc = 0;
if (rc == 0 && (flags & HAS_REPLY)) {
/* Pack reply. */
if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
req_capsule_set_size(pill, &RMF_MDT_MD, RCL_SERVER,
req_capsule_ptlreq(pill) ?
DEF_REP_MD_SIZE : MAX_MD_SIZE_OLD);
if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
req_capsule_set_size(pill, &RMF_LOGCOOKIES,
RCL_SERVER, 0);
/* Set ACL reply buffer size as LUSTRE_POSIX_ACL_MAX_SIZE_OLD
* by default. If the target object has more ACL entries, then
* enlarge the buffer when necessary.
*/
if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER))
req_capsule_set_size(pill, &RMF_ACL, RCL_SERVER,
LUSTRE_POSIX_ACL_MAX_SIZE_OLD);
mdt_preset_secctx_size(info);
mdt_preset_encctx_size(info);
rc = req_capsule_server_pack(pill);
if (rc)
CWARN("%s: cannot pack response: rc = %d\n",
mdt_obd_name(info->mti_mdt), rc);
}
RETURN(rc);
}
void mdt_thread_info_reset(struct mdt_thread_info *info)
{
memset(&info->mti_attr, 0, sizeof(info->mti_attr));
info->mti_body = NULL;
info->mti_dlm_req = NULL;
info->mti_cross_ref = 0;
info->mti_opdata = 0;
info->mti_big_lov_used = 0;
info->mti_big_lmv_used = 0;
info->mti_big_acl_used = 0;
info->mti_som_strict = 0;
info->mti_intent_lock = 0;
info->mti_spec.no_create = 0;
info->mti_spec.sp_rm_entry = 0;
info->mti_spec.sp_permitted = 0;
info->mti_spec.u.sp_ea.eadata = NULL;
info->mti_spec.u.sp_ea.eadatalen = 0;
if (info->mti_batch_env && info->mti_object != NULL) {
mdt_object_put(info->mti_env, info->mti_object);
info->mti_object = NULL;
}
}
/*
* Initialize fields of struct mdt_thread_info. Other fields are left in
* uninitialized state, because it's too expensive to zero out whole
* mdt_thread_info (> 1K) on each request arrival.
*/
void mdt_thread_info_init(struct ptlrpc_request *req,
struct mdt_thread_info *info)
{
info->mti_pill = &req->rq_pill;
/* mdt device: it can be NULL while CONNECT */
if (req->rq_export) {
info->mti_mdt = mdt_dev(req->rq_export->exp_obd->obd_lu_dev);
info->mti_exp = req->rq_export;
} else
info->mti_mdt = NULL;
info->mti_env = req->rq_svc_thread->t_env;
info->mti_transno = lustre_msg_get_transno(req->rq_reqmsg);
info->mti_big_buf = LU_BUF_NULL;
info->mti_batch_env = 0;
info->mti_object = NULL;
mdt_thread_info_reset(info);
}
void mdt_thread_info_fini(struct mdt_thread_info *info)
{
int i;
if (info->mti_object != NULL) {
mdt_object_put(info->mti_env, info->mti_object);
info->mti_object = NULL;
}
for (i = 0; i < ARRAY_SIZE(info->mti_lh); i++)
mdt_lock_handle_assert(&info->mti_lh[i]);
info->mti_env = NULL;
info->mti_pill = NULL;
info->mti_exp = NULL;
info->mti_mdt = NULL;
if (unlikely(info->mti_big_buf.lb_buf != NULL))
lu_buf_free(&info->mti_big_buf);
}
struct mdt_thread_info *tsi2mdt_info(struct tgt_session_info *tsi)
{
struct mdt_thread_info *mti;
mti = mdt_th_info(tsi->tsi_env);
LASSERT(mti != NULL);
mdt_thread_info_init(tgt_ses_req(tsi), mti);
if (tsi->tsi_corpus != NULL) {
mti->mti_object = mdt_obj(tsi->tsi_corpus);
lu_object_get(tsi->tsi_corpus);
}
mti->mti_body = tsi->tsi_mdt_body;
mti->mti_dlm_req = tsi->tsi_dlm_req;
return mti;
}
static int mdt_tgt_connect(struct tgt_session_info *tsi)
{
if (CFS_FAIL_CHECK(OBD_FAIL_TGT_DELAY_CONDITIONAL) &&
cfs_fail_val ==
tsi2mdt_info(tsi)->mti_mdt->mdt_seq_site.ss_node_id)
schedule_timeout_uninterruptible(cfs_time_seconds(3));
return tgt_connect(tsi);
}
static int mdt_intent_glimpse(enum ldlm_intent_flags it_opc,
struct mdt_thread_info *info,
struct ldlm_lock **lockp, __u64 flags)
{
return mdt_glimpse_enqueue(info, info->mti_mdt->mdt_namespace,
lockp, flags);
}
static int mdt_intent_brw(enum ldlm_intent_flags it_opc,
struct mdt_thread_info *info,
struct ldlm_lock **lockp, __u64 flags)
{
return mdt_brw_enqueue(info, info->mti_mdt->mdt_namespace,
lockp, flags);
}
int mdt_intent_lock_replace(struct mdt_thread_info *info,
struct ldlm_lock **lockp,
struct mdt_lock_handle *lh,
__u64 flags, int result)
{
struct ptlrpc_request *req = mdt_info_req(info);
struct ldlm_lock *lock = *lockp;
struct ldlm_lock *new_lock;
/* If possible resent found a lock, @lh is set to its handle */
new_lock = ldlm_handle2lock_long(&lh->mlh_reg_lh, 0);
if (new_lock == NULL) {
if (flags & LDLM_FL_INTENT_ONLY) {
result = 0;
} else if (flags & LDLM_FL_RESENT) {
/* Lock is pinned by ldlm_handle_enqueue0() as it is a
* resend case, however, it could be already destroyed
* due to client eviction or a raced cancel RPC.
*/
LDLM_DEBUG_NOLOCK("Invalid lock handle %#llx\n",
lh->mlh_reg_lh.cookie);
result = -ESTALE;
} else {
CERROR("%s: Invalid lockh=%#llx flags=%#llx fid1="DFID" fid2="DFID": rc = %d\n",
mdt_obd_name(info->mti_mdt),
lh->mlh_reg_lh.cookie, flags,
PFID(&info->mti_tmp_fid1),
PFID(&info->mti_tmp_fid2), result);
result = -ESTALE;
}
lh->mlh_reg_lh.cookie = 0;
RETURN(result);
}
/*
* If we've already given this lock to a client once, then we should
* have no readers or writers. Otherwise, we should have one reader
* _or_ writer ref (which will be zeroed below) before returning the
* lock to a client.
*/
if (new_lock->l_export == req->rq_export) {
LASSERT(new_lock->l_readers + new_lock->l_writers == 0);
} else {
LASSERT(new_lock->l_export == NULL);
LASSERT(new_lock->l_readers + new_lock->l_writers == 1);
}
*lockp = new_lock;
if (new_lock->l_export == req->rq_export) {
/*
* Already gave this to the client, which means that we
* reconstructed a reply.
*/
LASSERT(lustre_msg_get_flags(req->rq_reqmsg) &
MSG_RESENT);
ldlm_lock_put(new_lock);
lh->mlh_reg_lh.cookie = 0;
RETURN(ELDLM_LOCK_REPLACED);
}
/*
* Fixup the lock to be given to the client.
*/
lock_res_and_lock(new_lock);
/* Zero new_lock->l_readers and new_lock->l_writers without triggering
* possible blocking AST.
*/
while (new_lock->l_readers > 0) {
new_lock->l_readers--;
}
while (new_lock->l_writers > 0) {
new_lock->l_writers--;
}
new_lock->l_export = class_export_lock_get(req->rq_export, new_lock);
new_lock->l_blocking_ast = lock->l_blocking_ast;
new_lock->l_completion_ast = lock->l_completion_ast;
if (ldlm_has_dom(new_lock))
new_lock->l_glimpse_ast = ldlm_server_glimpse_ast;
new_lock->l_remote_handle = lock->l_remote_handle;
new_lock->l_flags &= ~LDLM_FL_LOCAL;
unlock_res_and_lock(new_lock);
cfs_hash_add(new_lock->l_export->exp_lock_hash,
&new_lock->l_remote_handle,
&new_lock->l_exp_hash);
ldlm_lock_put(new_lock);
lh->mlh_reg_lh.cookie = 0;
RETURN(ELDLM_LOCK_REPLACED);
}
void mdt_intent_fixup_resent(struct mdt_thread_info *info,
struct ldlm_lock *new_lock,
struct mdt_lock_handle *lh, __u64 flags)
{
struct ptlrpc_request *req = mdt_info_req(info);
struct ldlm_request *dlmreq;
if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))
return;
dlmreq = req_capsule_client_get(info->mti_pill, &RMF_DLM_REQ);
/* if this is a resend case (MSG_RESENT is set on RPC) and a lock was
* found by ldlm_handle_enqueue(); if so @lh must be initialized.
*/
if (flags & LDLM_FL_RESENT) {
lh->mlh_reg_lh.cookie = new_lock->l_handle.h_cookie;
lh->mlh_reg_mode = new_lock->l_granted_mode;
LDLM_DEBUG(new_lock, "Restoring lock cookie");
DEBUG_REQ(D_DLMTRACE, req, "restoring lock cookie %#llx",
lh->mlh_reg_lh.cookie);
return;
}
/*
* If the xid matches, then we know this is a resent request, and allow
* it. (It's probably an OPEN, for which we don't send a lock.
*/
if (req_can_reconstruct(req, NULL) != 0)
return;
/*
* This remote handle isn't enqueued, so we never received or processed
* this request. Clear MSG_RESENT, because it can be handled like any
* normal request now.
*/
lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
DEBUG_REQ(D_DLMTRACE, req, "no existing lock with rhandle %#llx",
dlmreq->lock_handle[0].cookie);
}
static int mdt_intent_getxattr(enum ldlm_intent_flags it_opc,
struct mdt_thread_info *info,
struct ldlm_lock **lockp,
__u64 flags)
{
struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_RMT];
struct ldlm_reply *ldlm_rep = NULL;
int rc;
ENTRY;
/*
* Initialize lhc->mlh_reg_lh either from a previously granted lock
* (for the resend case) or a new lock. Below we will use it to
* replace the original lock.
*/
mdt_intent_fixup_resent(info, *lockp, lhc, flags);
if (!lustre_handle_is_used(&lhc->mlh_reg_lh)) {
rc = mdt_object_lock(info, info->mti_object, lhc,
MDS_INODELOCK_XATTR, (*lockp)->l_req_mode);
if (rc)
return rc;
}
rc = mdt_getxattr(info);
if (mdt_info_req(info)->rq_repmsg != NULL)
ldlm_rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
if (ldlm_rep == NULL ||
CFS_FAIL_CHECK(OBD_FAIL_MDS_XATTR_REP)) {
mdt_object_unlock(info, info->mti_object, lhc, 1);
if (is_serious(rc))
RETURN(rc);
else
RETURN(err_serious(-EFAULT));
}
ldlm_rep->lock_policy_res2 = clear_serious(rc);
/* This is for interop instead of adding a new interop flag. LU-7433 */
#if LUSTRE_VERSION_CODE > OBD_OCD_VERSION(3, 0, 0, 0)
if (ldlm_rep->lock_policy_res2) {
mdt_object_unlock(info, info->mti_object, lhc, 1);
RETURN(ELDLM_LOCK_ABORTED);
}
#endif
rc = mdt_intent_lock_replace(info, lockp, lhc, flags, rc);
RETURN(rc);
}
static int mdt_intent_getattr(enum ldlm_intent_flags it_opc,
struct mdt_thread_info *info,
struct ldlm_lock **lockp,
__u64 flags)
{
struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_RMT];
__u64 child_bits;
struct ldlm_reply *ldlm_rep;
struct mdt_body *reqbody;
struct mdt_body *repbody;
int rc, rc2;
ENTRY;
reqbody = req_capsule_client_get(info->mti_pill, &RMF_MDT_BODY);
LASSERT(reqbody);
repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
LASSERT(repbody);
info->mti_cross_ref = !!(reqbody->mbo_valid & OBD_MD_FLCROSSREF);
repbody->mbo_eadatasize = 0;
repbody->mbo_aclsize = 0;
switch (it_opc) {
case IT_LOOKUP:
child_bits = MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM;
break;
case IT_GETATTR:
child_bits = MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
MDS_INODELOCK_PERM;
break;
default:
CERROR("%s: unsupported intent %#x\n",
mdt_obd_name(info->mti_mdt), (unsigned int)it_opc);
GOTO(out_shrink, rc = -EINVAL);
}
rc = mdt_init_ucred(info, reqbody);
if (rc)
GOTO(out_shrink, rc);
ldlm_rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
mdt_set_disposition(info, ldlm_rep, DISP_IT_EXECD);
/* Get lock from request for possible resent case. */
mdt_intent_fixup_resent(info, *lockp, lhc, flags);
rc = mdt_getattr_name_lock(info, lhc, child_bits, ldlm_rep);
ldlm_rep->lock_policy_res2 = clear_serious(rc);
if (mdt_get_disposition(ldlm_rep, DISP_LOOKUP_NEG) &&
ldlm_rep->lock_policy_res2 != -ENOKEY)
ldlm_rep->lock_policy_res2 = 0;
if (!mdt_get_disposition(ldlm_rep, DISP_LOOKUP_POS) ||
ldlm_rep->lock_policy_res2) {
lhc->mlh_reg_lh.cookie = 0ull;
/* Return error code immediately to stop batched statahead. */
GOTO(out_ucred, rc = info->mti_batch_env ? rc :
ELDLM_LOCK_ABORTED);
}
rc = mdt_intent_lock_replace(info, lockp, lhc, flags, rc);
EXIT;
out_ucred:
mdt_exit_ucred(info);
out_shrink:
mdt_client_compatibility(info);
rc2 = mdt_fix_reply(info);
if (rc == 0)
rc = rc2;
return rc;
}
static int mdt_layout_change_pccro(struct mdt_thread_info *info,
struct mdt_object *obj,
struct mdt_lock_handle *lhc,
struct md_layout_change *layout)
{
int rc;
ENTRY;
if (!mdt_object_exists(obj))
RETURN(-ENOENT);
if (!S_ISREG(lu_object_attr(&obj->mot_obj)))
RETURN(-EINVAL);
rc = mdt_object_lock(info, obj, lhc, MDS_INODELOCK_LAYOUT, LCK_CR);
if (rc)
RETURN(rc);
rc = mo_layout_check(info->mti_env,
mdt_object_child(obj), layout);
if (rc == -EALREADY)
RETURN(0);
mdt_object_unlock(info, obj, lhc, 1);
rc = mdt_layout_change(info, obj, lhc, layout);
RETURN(rc);
}
static int mdt_intent_layout(enum ldlm_intent_flags it_opc,
struct mdt_thread_info *info,
struct ldlm_lock **lockp,
__u64 flags)
{
struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_RMT];
struct md_layout_change layout = { .mlc_opc = MD_LAYOUT_NOP };
struct layout_intent *intent;
struct ldlm_reply *ldlm_rep;
struct lu_fid *fid = &info->mti_tmp_fid2;
struct mdt_object *obj = NULL;
int layout_size = 0;
struct lu_buf *buf = &layout.mlc_buf;
int rc = 0;
ENTRY;
fid_extract_from_res_name(fid, &(*lockp)->l_resource->lr_name);
intent = req_capsule_client_get(info->mti_pill, &RMF_LAYOUT_INTENT);
if (intent == NULL)
RETURN(-EPROTO);
CDEBUG(D_INFO, DFID "got layout change request from client: opc:%u flags:%#x extent "
DEXT"\n",
PFID(fid), intent->lai_opc, intent->lai_flags,
PEXT(&intent->lai_extent));
switch (intent->lai_opc) {
case LAYOUT_INTENT_TRUNC:
case LAYOUT_INTENT_WRITE:
case LAYOUT_INTENT_PCCRO_SET:
case LAYOUT_INTENT_PCCRO_CLEAR:
layout.mlc_opc = MD_LAYOUT_WRITE;
layout.mlc_intent = intent;
break;
case LAYOUT_INTENT_ACCESS:
break;
case LAYOUT_INTENT_READ:
case LAYOUT_INTENT_GLIMPSE:
case LAYOUT_INTENT_RELEASE:
case LAYOUT_INTENT_RESTORE:
CERROR("%s: Unsupported layout intent opc %d\n",
mdt_obd_name(info->mti_mdt), intent->lai_opc);
RETURN(-ENOTSUPP);
default:
CERROR("%s: Unknown layout intent opc %d\n",
mdt_obd_name(info->mti_mdt), intent->lai_opc);
RETURN(-EINVAL);
}
obj = mdt_object_find(info->mti_env, info->mti_mdt, fid);
if (IS_ERR(obj))
RETURN(PTR_ERR(obj));
if (mdt_object_exists(obj) && !mdt_object_remote(obj)) {
/* if layout is going to be changed don't use the current EA
* size but the maximum one. That buffer will be shrinked
* to the actual size in req_capsule_shrink() before reply.
*/
if (layout.mlc_opc == MD_LAYOUT_WRITE) {
layout_size = info->mti_mdt->mdt_max_mdsize;
} else {
layout_size = mdt_attr_get_eabuf_size(info, obj);
if (layout_size < 0)
GOTO(out, rc = layout_size);
if (layout_size > info->mti_mdt->mdt_max_mdsize)
info->mti_mdt->mdt_max_mdsize = layout_size;
}
CDEBUG(D_INFO, "%s: layout_size %d\n",
mdt_obd_name(info->mti_mdt), layout_size);
}
/*
* set reply buffer size, so that ldlm_handle_enqueue0()->
* ldlm_lvbo_fill() will fill the reply buffer with lovea.
*/
req_capsule_set_size(info->mti_pill, &RMF_DLM_LVB, RCL_SERVER,
layout_size);
rc = req_capsule_server_pack(info->mti_pill);
if (rc)
GOTO(out, rc);
ldlm_rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
if (!ldlm_rep)
GOTO(out, rc = -EPROTO);
mdt_set_disposition(info, ldlm_rep, DISP_IT_EXECD);
/* take lock in ldlm_lock_enqueue() for LAYOUT_INTENT_ACCESS */
if (layout.mlc_opc == MD_LAYOUT_NOP)
GOTO(out, rc = 0);
rc = mdt_check_resent(info, mdt_reconstruct_generic, lhc);
if (rc < 0)
GOTO(out, rc);
if (rc == 1) {
DEBUG_REQ(D_INODE, mdt_info_req(info), "resent opt.");
rc = lustre_msg_get_status(mdt_info_req(info)->rq_repmsg);
GOTO(out, rc);
}
buf->lb_buf = NULL;
buf->lb_len = 0;
if (unlikely(req_is_replay(mdt_info_req(info)))) {
buf->lb_buf = req_capsule_client_get(info->mti_pill,
&RMF_EADATA);
buf->lb_len = req_capsule_get_size(info->mti_pill,
&RMF_EADATA, RCL_CLIENT);
/*
* If it's a replay of layout write intent RPC, the client has
* saved the extended lovea when it get reply then.
*/
if (buf->lb_len > 0)
mdt_fix_lov_magic(info, buf->lb_buf);
}
/* Get lock from request for possible resent case. */
mdt_intent_fixup_resent(info, *lockp, lhc, flags);
(*lockp)->l_lvb_type = LVB_T_LAYOUT;
if (intent->lai_opc == LAYOUT_INTENT_PCCRO_SET)
/*
* Take a CR layout lock against the file object first to check
* whether the file is already PCC-RO cached. If so, return
* immediately; Otherwise, take an EX layout lock on the file
* to update the FLR PCC-RO state accordingly. By this check,
* it can avoid heavy lock contention and unnecessary revocation
* of the layout lock granted to the other clients when multiple
* processes from many clients perform read-only attach on a
* shared file object simultaneously.
*/
rc = mdt_layout_change_pccro(info, obj, lhc, &layout);
else
/*
* Instantiate some layout components, if @buf contains lovea,
* then it's a replay of the layout intent write RPC.
*/
rc = mdt_layout_change(info, obj, lhc, &layout);
ldlm_rep->lock_policy_res2 = clear_serious(rc);
if (lustre_handle_is_used(&lhc->mlh_reg_lh)) {
rc = mdt_intent_lock_replace(info, lockp, lhc, flags, rc);
if (rc == ELDLM_LOCK_REPLACED &&
(*lockp)->l_granted_mode == LCK_EX)
ldlm_lock_mode_downgrade(*lockp, LCK_CR);
}
EXIT;
out:
mdt_object_put(info->mti_env, obj);
return rc;
}
static int mdt_intent_open(enum ldlm_intent_flags it_opc,
struct mdt_thread_info *info,
struct ldlm_lock **lockp,
__u64 flags)
{
struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_RMT];
struct ldlm_reply *rep = NULL;
long opc;
int rc;
struct ptlrpc_request *req = mdt_info_req(info);
static const struct req_format *intent_fmts[REINT_MAX] = {
[REINT_CREATE] = &RQF_LDLM_INTENT_CREATE,
[REINT_OPEN] = &RQF_LDLM_INTENT_OPEN
};
ENTRY;
opc = mdt_reint_opcode(mdt_info_req(info), intent_fmts);
if (opc < 0)
RETURN(opc);
/* Get lock from request for possible resent case. */
mdt_intent_fixup_resent(info, *lockp, lhc, flags);
rc = mdt_reint_internal(info, lhc, opc);
if (rc < 0 && lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
DEBUG_REQ(D_ERROR, req, "Replay open failed with %d", rc);
/* Check whether the reply has been packed successfully. */
if (mdt_info_req(info)->rq_repmsg != NULL)
rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
if (rep == NULL) {
if (is_serious(rc))
RETURN(rc);
else
RETURN(err_serious(-EFAULT));
}
/* MDC expects this in any case */
if (rc != 0)
mdt_set_disposition(info, rep, DISP_LOOKUP_EXECD);
/* the open lock or the lock for cross-ref object should be
* returned to the client
*/
if (lustre_handle_is_used(&lhc->mlh_reg_lh) &&
(rc == 0 || rc == -MDT_EREMOTE_OPEN)) {
rep->lock_policy_res2 = 0;
rc = mdt_intent_lock_replace(info, lockp, lhc, flags, rc);
RETURN(rc);
}
rep->lock_policy_res2 = clear_serious(rc);
if (rep->lock_policy_res2 == -ENOENT &&
mdt_get_disposition(rep, DISP_LOOKUP_NEG) &&
!mdt_get_disposition(rep, DISP_OPEN_CREATE))
rep->lock_policy_res2 = 0;
lhc->mlh_reg_lh.cookie = 0ull;
if (rc == -ENOTCONN || rc == -ENODEV ||
rc == -EOVERFLOW) { /**< if VBR failure then return error */
/*
* If it is the disconnect error (ENODEV & ENOCONN), the error
* will be returned by rq_status, and client at ptlrpc layer
* will detect this, then disconnect, reconnect the import
* immediately, instead of impacting the following the rpc.
*/
RETURN(rc);
}
/*
* For other cases, the error will be returned by intent, and client
* will retrieve the result from intent.
*/
RETURN(ELDLM_LOCK_ABORTED);
}
static int mdt_intent_opc(enum ldlm_intent_flags it_opc,
struct mdt_thread_info *info,
struct ldlm_lock **lockp,
u64 flags /* LDLM_FL_* */)
{
struct req_capsule *pill = info->mti_pill;
struct ptlrpc_request *req = mdt_info_req(info);
const struct req_format *it_format;
int (*it_handler)(enum ldlm_intent_flags,
struct mdt_thread_info *,
struct ldlm_lock **,
u64);
enum tgt_handler_flags it_handler_flags = 0;
struct ldlm_reply *rep;
bool check_mdt_object = false;
int rc;
ENTRY;
switch (it_opc) {
case IT_OPEN:
case IT_CREAT:
case IT_OPEN|IT_CREAT:
/*
* OCREAT is not a IS_MUTABLE request since the file may
* already exist. We do the extra check of
* OBD_CONNECT_RDONLY in mdt_reint_open() when we
* really need to create the object.
*/
it_format = &RQF_LDLM_INTENT;
it_handler = &mdt_intent_open;
break;
case IT_GETATTR:
check_mdt_object = true;
fallthrough;
case IT_LOOKUP:
it_format = &RQF_LDLM_INTENT_GETATTR;
it_handler = &mdt_intent_getattr;
it_handler_flags = HAS_REPLY;
break;
case IT_GETXATTR:
check_mdt_object = true;
it_format = &RQF_LDLM_INTENT_GETXATTR;
it_handler = &mdt_intent_getxattr;
it_handler_flags = HAS_BODY;
break;
case IT_LAYOUT:
it_format = &RQF_LDLM_INTENT_LAYOUT;
it_handler = &mdt_intent_layout;
break;
case IT_GLIMPSE:
it_format = &RQF_LDLM_INTENT;
it_handler = &mdt_intent_glimpse;
break;
case IT_BRW:
it_format = &RQF_LDLM_INTENT;
it_handler = &mdt_intent_brw;
break;
case IT_QUOTA_DQACQ:
case IT_QUOTA_CONN: {
struct lu_device *qmt = info->mti_mdt->mdt_qmt_dev;
if (qmt == NULL)
RETURN(-EOPNOTSUPP);
if (mdt_rdonly(req->rq_export))
RETURN(-EROFS);
(*lockp)->l_lvb_type = LVB_T_LQUOTA;
/* pass the request to quota master */
rc = qmt_hdls.qmth_intent_policy(info->mti_env, qmt,
mdt_info_req(info), lockp,
flags);
RETURN(rc);
}
default:
CERROR("%s: unknown intent code %#x\n",
mdt_obd_name(info->mti_mdt), it_opc);
RETURN(-EPROTO);
}
if (!info->mti_batch_env)
req_capsule_extend(pill, it_format);
rc = mdt_unpack_req_pack_rep(info, it_handler_flags);
if (rc < 0)
RETURN(rc);
if (unlikely(info->mti_object == NULL && check_mdt_object))
RETURN(-EPROTO);
if (it_handler_flags & IS_MUTABLE && mdt_rdonly(req->rq_export))
RETURN(-EROFS);
CFS_FAIL_TIMEOUT(OBD_FAIL_MDS_INTENT_DELAY, 10);
/* execute policy */
rc = (*it_handler)(it_opc, info, lockp, flags);
/* Check whether the reply has been packed successfully. */
if (info->mti_batch_env || req->rq_repmsg != NULL) {
rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
rep->lock_policy_res2 =
ptlrpc_status_hton(rep->lock_policy_res2);
}
RETURN(rc);
}
static void mdt_ptlrpc_stats_update(struct ptlrpc_request *req,
enum ldlm_intent_flags it_opc)
{
struct lprocfs_stats *srv_stats = ptlrpc_req2svc(req)->srv_stats;
/* update stats when IT code is known */
if (srv_stats != NULL)
lprocfs_counter_incr(srv_stats,
PTLRPC_LAST_CNTR + (it_opc == IT_GLIMPSE ?
LDLM_GLIMPSE_ENQUEUE : LDLM_IBITS_ENQUEUE));
}
static int mdt_intent_policy(const struct lu_env *env,
struct ldlm_namespace *ns,
struct ldlm_lock **lockp,
void *req_cookie,
enum ldlm_mode mode,
__u64 flags, void *data)
{
struct tgt_session_info *tsi;
struct mdt_thread_info *info;
struct ptlrpc_request *req = req_cookie;
struct ldlm_intent *it;
struct req_capsule *pill;
const struct ldlm_lock_desc *ldesc;
int rc;
ENTRY;
LASSERT(req != NULL);
tsi = tgt_ses_info(env);
info = mdt_th_info(env);
LASSERT(info != NULL);
/* Check whether it is a sub request processing in a batch request */
if (info->mti_batch_env) {
pill = info->mti_pill;
LASSERT(pill == &info->mti_sub_pill);
} else {
info = tsi2mdt_info(tsi);
pill = info->mti_pill;
}
LASSERT(pill->rc_req == req);
ldesc = &info->mti_dlm_req->lock_desc;
if (info->mti_batch_env ||
req->rq_reqmsg->lm_bufcount > DLM_INTENT_IT_OFF) {
/*
* For batch processing environment, the request format has
* already been set.
*/
if (!info->mti_batch_env)
req_capsule_extend(pill, &RQF_LDLM_INTENT_BASIC);
it = req_capsule_client_get(pill, &RMF_LDLM_INTENT);
if (it != NULL) {
mdt_ptlrpc_stats_update(req, it->opc);
info->mti_intent_lock = 1;
/*
* For intent lock request with policy, the ELC locks
* have been cancelled in ldlm_handle_enqueue0().
* Thus set @mti_dlm_req with null here.
*/
info->mti_dlm_req = NULL;
rc = mdt_intent_opc(it->opc, info, lockp, flags);
if (rc == 0)
rc = ELDLM_OK;
/* Lock without inodebits makes no sense and will oops
* later in ldlm. Let's check it now to see if we have
* ibits corrupted somewhere in mdt_intent_opc().
* The case for client miss to set ibits has been
* processed by others.
*/
LASSERT(ergo(ldesc->l_resource.lr_type == LDLM_IBITS,
ldesc->l_policy_data.l_inodebits.bits != 0));
} else {
rc = err_serious(-EFAULT);
}
} else if (ldesc->l_resource.lr_type == LDLM_IBITS &&
ldesc->l_policy_data.l_inodebits.bits == MDS_INODELOCK_DOM) {
struct ldlm_reply *rep;
/* No intent was provided but INTENT flag is set along with
* DOM bit, this is considered as GLIMPSE request.
* This logic is common for MDT and OST glimpse
*/
mdt_ptlrpc_stats_update(req, IT_GLIMPSE);
rc = mdt_glimpse_enqueue(info, ns, lockp, flags);
/* Check whether the reply has been packed successfully. */
if (req->rq_repmsg != NULL) {
rep = req_capsule_server_get(info->mti_pill,
&RMF_DLM_REP);
rep->lock_policy_res2 =
ptlrpc_status_hton(rep->lock_policy_res2);
}
} else {
/* No intent was provided */
req_capsule_set_size(pill, &RMF_DLM_LVB, RCL_SERVER, 0);
rc = req_capsule_server_pack(pill);
if (rc)
rc = err_serious(rc);
}
if (!info->mti_batch_env)
mdt_thread_info_fini(info);
RETURN(rc);
}
static void mdt_deregister_seq_exp(struct mdt_device *mdt)
{
struct seq_server_site *ss = mdt_seq_site(mdt);
if (ss->ss_node_id == 0)
return;
if (ss->ss_client_seq != NULL) {
lustre_deregister_lwp_item(&ss->ss_client_seq->lcs_exp);
ss->ss_client_seq->lcs_exp = NULL;
}
if (ss->ss_server_fld != NULL) {
lustre_deregister_lwp_item(&ss->ss_server_fld->lsf_control_exp);
ss->ss_server_fld->lsf_control_exp = NULL;
}
}
static void mdt_seq_fini_cli(struct mdt_device *mdt)
{
struct seq_server_site *ss = mdt_seq_site(mdt);
if (ss == NULL)
return;
if (ss->ss_server_seq != NULL)
seq_server_set_cli(NULL, ss->ss_server_seq, NULL);
}
static int mdt_seq_fini(const struct lu_env *env, struct mdt_device *mdt)
{
mdt_seq_fini_cli(mdt);
mdt_deregister_seq_exp(mdt);
return seq_site_fini(env, mdt_seq_site(mdt));
}
/**
* It will retrieve its FLDB entries from MDT0, and it only happens
* when upgrading existent FS to 2.6 or when local FLDB is corrupted,
* and it needs to refresh FLDB from the MDT0.
**/
static int mdt_register_lwp_callback(void *data)
{
struct lu_env env;
struct mdt_device *mdt = data;
struct lu_server_fld *fld = mdt_seq_site(mdt)->ss_server_fld;
int rc;
ENTRY;
LASSERT(mdt_seq_site(mdt)->ss_node_id != 0);
rc = lu_env_init(&env, LCT_MD_THREAD);
if (rc < 0) {
CERROR("%s: cannot init env: rc = %d\n", mdt_obd_name(mdt), rc);
RETURN(rc);
}
/* Allocate new sequence now to avoid creating local transaction
* in the normal transaction process
*/
rc = seq_server_check_and_alloc_super(&env,
mdt_seq_site(mdt)->ss_server_seq);
if (rc < 0)
GOTO(out, rc);
if (fld->lsf_new) {
rc = fld_update_from_controller(&env, fld);
if (rc != 0) {
CERROR("%s: cannot update controller: rc = %d\n",
mdt_obd_name(mdt), rc);
GOTO(out, rc);
}
}
out:
lu_env_fini(&env);
RETURN(rc);
}
static int mdt_register_seq_exp(struct mdt_device *mdt)
{
struct seq_server_site *ss = mdt_seq_site(mdt);
char *lwp_name = NULL;
int rc;
if (ss->ss_node_id == 0)
return 0;
OBD_ALLOC(lwp_name, MAX_OBD_NAME);
if (lwp_name == NULL)
GOTO(out_free, rc = -ENOMEM);
rc = tgt_name2lwp_name(mdt_obd_name(mdt), lwp_name, MAX_OBD_NAME, 0);
if (rc != 0)
GOTO(out_free, rc);
rc = lustre_register_lwp_item(lwp_name, &ss->ss_client_seq->lcs_exp,
NULL, NULL);
if (rc != 0)
GOTO(out_free, rc);
rc = lustre_register_lwp_item(lwp_name,
&ss->ss_server_fld->lsf_control_exp,
mdt_register_lwp_callback, mdt);
if (rc != 0) {
lustre_deregister_lwp_item(&ss->ss_client_seq->lcs_exp);
ss->ss_client_seq->lcs_exp = NULL;
GOTO(out_free, rc);
}
out_free:
OBD_FREE(lwp_name, MAX_OBD_NAME);
return rc;
}
/*
* Init client sequence manager which is used by local MDS to talk to sequence
* controller on remote node.
*/
static int mdt_seq_init_cli(const struct lu_env *env, struct mdt_device *mdt)
{
struct seq_server_site *ss = mdt_seq_site(mdt);
char *prefix;
ENTRY;
/* check if this is adding the first MDC and controller is not yet
* initialized.
*/
OBD_ALLOC_PTR(ss->ss_client_seq);
if (ss->ss_client_seq == NULL)
RETURN(-ENOMEM);
OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
if (prefix == NULL) {
OBD_FREE_PTR(ss->ss_client_seq);
ss->ss_client_seq = NULL;
RETURN(-ENOMEM);
}
/* Note: seq_client_fini will be called in seq_site_fini */
snprintf(prefix, MAX_OBD_NAME + 5, "ctl-%s", mdt_obd_name(mdt));
seq_client_init(ss->ss_client_seq, NULL, LUSTRE_SEQ_METADATA,
prefix, ss->ss_node_id == 0 ? ss->ss_control_seq :
NULL);
OBD_FREE(prefix, MAX_OBD_NAME + 5);
RETURN(seq_server_set_cli(env, ss->ss_server_seq, ss->ss_client_seq));
}
static int mdt_seq_init(const struct lu_env *env, struct mdt_device *mdt)
{
struct seq_server_site *ss;
int rc;
ENTRY;
ss = mdt_seq_site(mdt);
/* init sequence controller server(MDT0) */
if (ss->ss_node_id == 0) {
OBD_ALLOC_PTR(ss->ss_control_seq);
if (ss->ss_control_seq == NULL)
RETURN(-ENOMEM);
rc = seq_server_init(env, ss->ss_control_seq, mdt->mdt_bottom,
mdt_obd_name(mdt), LUSTRE_SEQ_CONTROLLER,
ss, true);
if (rc)
GOTO(out_seq_fini, rc);
}
/* Init normal sequence server */
OBD_ALLOC_PTR(ss->ss_server_seq);
if (ss->ss_server_seq == NULL)
GOTO(out_seq_fini, rc = -ENOMEM);
rc = seq_server_init(env, ss->ss_server_seq, mdt->mdt_bottom,
mdt_obd_name(mdt), LUSTRE_SEQ_SERVER, ss, true);
if (rc)
GOTO(out_seq_fini, rc);
/* init seq client for seq server to talk to seq controller(MDT0) */
rc = mdt_seq_init_cli(env, mdt);
if (rc != 0)
GOTO(out_seq_fini, rc);
if (ss->ss_node_id != 0)
/* register controller export through lwp */
rc = mdt_register_seq_exp(mdt);
EXIT;
out_seq_fini:
if (rc)
mdt_seq_fini(env, mdt);
return rc;
}
/*
* FLD wrappers
*/
static int mdt_fld_fini(const struct lu_env *env,
struct mdt_device *m)
{
struct seq_server_site *ss = mdt_seq_site(m);
ENTRY;
if (ss && ss->ss_server_fld) {
fld_server_fini(env, ss->ss_server_fld);
OBD_FREE_PTR(ss->ss_server_fld);
ss->ss_server_fld = NULL;
}
RETURN(0);
}
static int mdt_fld_init(const struct lu_env *env,
const char *uuid,
struct mdt_device *m)
{
struct seq_server_site *ss;
int rc;
ENTRY;
ss = mdt_seq_site(m);
OBD_ALLOC_PTR(ss->ss_server_fld);
if (ss->ss_server_fld == NULL)
RETURN(rc = -ENOMEM);
rc = fld_server_init(env, ss->ss_server_fld, m->mdt_bottom, uuid,
LU_SEQ_RANGE_MDT);
if (rc) {
OBD_FREE_PTR(ss->ss_server_fld);
ss->ss_server_fld = NULL;
RETURN(rc);
}
RETURN(0);
}
static void mdt_stack_pre_fini(const struct lu_env *env,
struct mdt_device *m, struct lu_device *top)
{
struct lustre_cfg_bufs *bufs;
struct lustre_cfg *lcfg;
struct mdt_thread_info *info;
ENTRY;
LASSERT(top);
info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
LASSERT(info != NULL);
bufs = &info->mti_u.bufs;
LASSERT(m->mdt_child_exp);
LASSERT(m->mdt_child_exp->exp_obd);
/* process cleanup, pass mdt obd name to get obd umount flags */
/* XXX: this is needed because all layers are referenced by
* objects (some of them are pinned by osd, for example *
* the proper solution should be a model where object used
* by osd only doesn't have mdt/mdd slices -bzzz
*/
lustre_cfg_bufs_reset(bufs, mdt_obd_name(m));
lustre_cfg_bufs_set_string(bufs, 1, NULL);
OBD_ALLOC(lcfg, lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen));
if (!lcfg)
RETURN_EXIT;
lustre_cfg_init(lcfg, LCFG_PRE_CLEANUP, bufs);
top->ld_ops->ldo_process_config(env, top, lcfg);
OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
EXIT;
}
static void mdt_stack_fini(const struct lu_env *env,
struct mdt_device *m, struct lu_device *top)
{
struct obd_device *obd = mdt2obd_dev(m);
struct lustre_cfg_bufs *bufs;
struct lustre_cfg *lcfg;
struct mdt_thread_info *info;
char flags[3] = "";
ENTRY;
info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
LASSERT(info != NULL);
lu_dev_del_linkage(top->ld_site, top);
lu_site_purge(env, top->ld_site, -1);
bufs = &info->mti_u.bufs;
/* process cleanup, pass mdt obd name to get obd umount flags */
/* another purpose is to let all layers to release their objects */
lustre_cfg_bufs_reset(bufs, mdt_obd_name(m));
if (test_bit(OBDF_FORCE, obd->obd_flags))
strcat(flags, "F");
if (test_bit(OBDF_FAIL, obd->obd_flags))
strcat(flags, "A");
lustre_cfg_bufs_set_string(bufs, 1, flags);
OBD_ALLOC(lcfg, lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen));
if (!lcfg)
RETURN_EXIT;
lustre_cfg_init(lcfg, LCFG_CLEANUP, bufs);
LASSERT(top);
top->ld_ops->ldo_process_config(env, top, lcfg);
OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
lu_site_purge(env, top->ld_site, -1);
m->mdt_child = NULL;
m->mdt_bottom = NULL;
obd_disconnect(m->mdt_child_exp);
m->mdt_child_exp = NULL;
obd_disconnect(m->mdt_bottom_exp);
m->mdt_child_exp = NULL;
}
static int mdt_connect_to_next(const struct lu_env *env, struct mdt_device *m,
const char *next, struct obd_export **exp)
{
struct obd_connect_data *data = NULL;
struct obd_device *obd;
int rc;
ENTRY;
OBD_ALLOC_PTR(data);
if (data == NULL)
GOTO(out, rc = -ENOMEM);
obd = class_name2obd(next);
if (obd == NULL) {
CERROR("%s: can't locate next device: %s\n",
mdt_obd_name(m), next);
GOTO(out, rc = -ENOTCONN);
}
data->ocd_connect_flags = OBD_CONNECT_VERSION;
data->ocd_version = LUSTRE_VERSION_CODE;
rc = obd_connect(NULL, exp, obd, &obd->obd_uuid, data, NULL);
if (rc) {
CERROR("%s: cannot connect to next dev %s (%d)\n",
mdt_obd_name(m), next, rc);
GOTO(out, rc);
}
out:
OBD_FREE_PTR(data);
RETURN(rc);
}
static int mdt_stack_init(const struct lu_env *env, struct mdt_device *mdt,
struct lustre_cfg *cfg)
{
char *dev = lustre_cfg_string(cfg, 0);
int rc, name_size, uuid_size;
char *name, *uuid, *p;
struct lustre_cfg_bufs *bufs;
struct lustre_cfg *lcfg;
struct obd_device *obd;
struct lustre_profile *lprof;
struct lu_site *site;
ENTRY;
/* in 1.8 we had the only device in the stack - MDS.
* 2.0 introduces MDT, MDD, OSD; MDT starts others internally.
* in 2.3 OSD is instantiated by obd_mount.c, so we need
* to generate names and setup MDT, MDD. MDT will be using
* generated name to connect to MDD. for MDD the next device
* will be LOD with name taken from so called "profile" which
* is generated by mount_option line
*
* 1.8 MGS generates config. commands like this:
* #06 (104)mount_option 0: 1:lustre-MDT0000 2:lustre-mdtlov
* #08 (120)setup 0:lustre-MDT0000 1:dev 2:type 3:lustre-MDT0000
* 2.0 MGS generates config. commands like this:
* #07 (112)mount_option 0: 1:lustre-MDT0000 2:lustre-MDT0000-mdtlov
* #08 (160)setup 0:lustre-MDT0000 1:lustre-MDT0000_UUID 2:0
* 3:lustre-MDT0000-mdtlov 4:f
*
* we generate MDD name from MDT one, just replacing T with D
*
* after all the preparations, the logical equivalent will be
* #01 (160)setup 0:lustre-MDD0000 1:lustre-MDD0000_UUID 2:0
* 3:lustre-MDT0000-mdtlov 4:f
* #02 (160)setup 0:lustre-MDT0000 1:lustre-MDT0000_UUID 2:0
* 3:lustre-MDD0000 4:f
*
* notice we build the stack from down to top: MDD first, then MDT
*/
name_size = MAX_OBD_NAME;
uuid_size = MAX_OBD_NAME;
OBD_ALLOC(name, name_size);
OBD_ALLOC(uuid, uuid_size);
if (name == NULL || uuid == NULL)
GOTO(cleanup_mem, rc = -ENOMEM);
OBD_ALLOC_PTR(bufs);
if (!bufs)
GOTO(cleanup_mem, rc = -ENOMEM);
strcpy(name, dev);
p = strstr(name, "-MDT");
if (p == NULL)
GOTO(free_bufs, rc = -ENOMEM);
p[3] = 'D';
snprintf(uuid, MAX_OBD_NAME, "%s_UUID", name);
lprof = class_get_profile(lustre_cfg_string(cfg, 0));
if (lprof == NULL || lprof->lp_dt == NULL) {
CERROR("can't find the profile: %s\n",
lustre_cfg_string(cfg, 0));
GOTO(free_bufs, rc = -EINVAL);
}
obd = class_attach_name(LUSTRE_MDD_NAME, name, uuid);
if (IS_ERR(obd))
GOTO(put_profile, rc = PTR_ERR(obd));
lustre_cfg_bufs_reset(bufs, name);
lustre_cfg_bufs_set_string(bufs, 1, uuid);
lustre_cfg_bufs_set_string(bufs, 2, dev);
lustre_cfg_bufs_set_string(bufs, 3, lprof->lp_dt);
OBD_ALLOC(lcfg, lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen));
if (!lcfg)
GOTO(class_detach, rc = -ENOMEM);
lustre_cfg_init(lcfg, LCFG_SETUP, bufs);
rc = class_setup(obd, lcfg);
if (rc)
GOTO(class_detach, rc);
/* connect to MDD we just setup */
rc = mdt_connect_to_next(env, mdt, name, &mdt->mdt_child_exp);
if (rc)
GOTO(class_detach, rc);
site = mdt->mdt_child_exp->exp_obd->obd_lu_dev->ld_site;
LASSERT(site);
LASSERT(mdt_lu_site(mdt) == NULL);
mdt->mdt_lu_dev.ld_site = site;
site->ls_top_dev = &mdt->mdt_lu_dev;
mdt->mdt_child = lu2md_dev(mdt->mdt_child_exp->exp_obd->obd_lu_dev);
/* now connect to bottom OSD */
snprintf(name, MAX_OBD_NAME, "%s-osd", dev);
rc = mdt_connect_to_next(env, mdt, name, &mdt->mdt_bottom_exp);
if (rc)
GOTO(class_detach, rc);
mdt->mdt_bottom =
lu2dt_dev(mdt->mdt_bottom_exp->exp_obd->obd_lu_dev);
rc = lu_env_refill((struct lu_env *)env);
if (rc != 0)
CERROR("Failure to refill session: '%d'\n", rc);
lu_dev_add_linkage(site, &mdt->mdt_lu_dev);
EXIT;
class_detach:
if (rc)
class_detach(obd);
if (lcfg)
OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
put_profile:
class_put_profile(lprof);
free_bufs:
OBD_FREE_PTR(bufs);
cleanup_mem:
OBD_FREE(name, name_size);
OBD_FREE(uuid, uuid_size);
RETURN(rc);
}
/* setup quota master target on MDT0 */
static int mdt_quota_init(const struct lu_env *env, struct mdt_device *mdt,
struct lustre_cfg *cfg)
{
struct obd_device *obd;
char *dev = lustre_cfg_string(cfg, 0);
char *qmtname, *uuid, *p;
struct lustre_cfg_bufs *bufs;
struct lustre_cfg *lcfg;
struct lustre_profile *lprof;
struct obd_connect_data *data;
int rc;
ENTRY;
LASSERT(mdt->mdt_qmt_exp == NULL);
LASSERT(mdt->mdt_qmt_dev == NULL);
/* quota master is on MDT0 only for now */
if (mdt->mdt_seq_site.ss_node_id != 0)
RETURN(0);
/* MGS generates config commands which look as follows:
* #01 (160)setup 0:lustre-MDT0000 1:lustre-MDT0000_UUID 2:0
* 3:lustre-MDT0000-mdtlov 4:f
*
* We generate the QMT name from the MDT one, just replacing MD with QM
* after all the preparations, the logical equivalent will be:
* #01 (160)setup 0:lustre-QMT0000 1:lustre-QMT0000_UUID 2:0
* 3:lustre-MDT0000-osd 4:f
*/
OBD_ALLOC(qmtname, MAX_OBD_NAME);
OBD_ALLOC(uuid, UUID_MAX);
OBD_ALLOC_PTR(bufs);
OBD_ALLOC_PTR(data);
if (qmtname == NULL || uuid == NULL || bufs == NULL || data == NULL)
GOTO(cleanup_mem, rc = -ENOMEM);
strcpy(qmtname, dev);
p = strstr(qmtname, "-MDT");
if (p == NULL)
GOTO(cleanup_mem, rc = -ENOMEM);
/* replace MD with QM */
p[1] = 'Q';
p[2] = 'M';
snprintf(uuid, UUID_MAX, "%s_UUID", qmtname);
lprof = class_get_profile(lustre_cfg_string(cfg, 0));
if (lprof == NULL || lprof->lp_dt == NULL) {
CERROR("can't find profile for %s\n",
lustre_cfg_string(cfg, 0));
GOTO(cleanup_mem, rc = -EINVAL);
}
obd = class_attach_name(LUSTRE_QMT_NAME, qmtname, uuid);
if (IS_ERR(obd))
GOTO(put_profile, rc = PTR_ERR(obd));
lustre_cfg_bufs_reset(bufs, qmtname);
lustre_cfg_bufs_set_string(bufs, 1, uuid);
lustre_cfg_bufs_set_string(bufs, 2, dev);
/* for quota, the next device should be the OSD device */
lustre_cfg_bufs_set_string(bufs, 3,
mdt->mdt_bottom->dd_lu_dev.ld_obd->obd_name);
OBD_ALLOC(lcfg, lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen));
if (!lcfg)
GOTO(class_detach, rc = -ENOMEM);
lustre_cfg_init(lcfg, LCFG_SETUP, bufs);
rc = class_setup(obd, lcfg);
if (rc)
GOTO(class_detach, rc);
mdt->mdt_qmt_dev = obd->obd_lu_dev;
/* configure local quota objects */
if (CFS_FAIL_CHECK(OBD_FAIL_QUOTA_INIT))
rc = -EBADF;
else
rc = mdt->mdt_qmt_dev->ld_ops->ldo_prepare(env,
&mdt->mdt_lu_dev,
mdt->mdt_qmt_dev);
if (rc)
GOTO(class_cleanup, rc);
/* connect to quota master target */
data->ocd_connect_flags = OBD_CONNECT_VERSION;
data->ocd_version = LUSTRE_VERSION_CODE;
rc = obd_connect(NULL, &mdt->mdt_qmt_exp, obd, &obd->obd_uuid,
data, NULL);
if (rc) {
CERROR("cannot connect to quota master device %s (%d)\n",
qmtname, rc);
GOTO(class_cleanup, rc);
}
EXIT;
class_cleanup:
if (rc) {
class_manual_cleanup(obd);
mdt->mdt_qmt_dev = NULL;
GOTO(lcfg_cleanup, rc);
}
class_detach:
if (rc)
class_detach(obd);
lcfg_cleanup:
OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
put_profile:
class_put_profile(lprof);
cleanup_mem:
OBD_FREE_PTR(bufs);
OBD_FREE(qmtname, MAX_OBD_NAME);
OBD_FREE(uuid, UUID_MAX);
OBD_FREE_PTR(data);
return rc;
}
/* Shutdown quota master target associated with mdt */
static void mdt_quota_fini(const struct lu_env *env, struct mdt_device *mdt)
{
ENTRY;
if (mdt->mdt_qmt_exp == NULL)
RETURN_EXIT;
LASSERT(mdt->mdt_qmt_dev != NULL);
/* the qmt automatically shuts down when the mdt disconnects */
obd_disconnect(mdt->mdt_qmt_exp);
mdt->mdt_qmt_exp = NULL;
mdt->mdt_qmt_dev = NULL;
EXIT;
}
/* mdt_getxattr() is used from mdt_intent_getxattr(), use this wrapper
* for now. This will be removed along with converting rest of MDT code
* to use tgt_session_info
*/
static int mdt_tgt_getxattr(struct tgt_session_info *tsi)
{
struct mdt_thread_info *info = tsi2mdt_info(tsi);
int rc;
if (unlikely(info->mti_object == NULL))
return -EPROTO;
rc = mdt_getxattr(info);
mdt_thread_info_fini(info);
return rc;
}
static int mdt_llog_open(struct tgt_session_info *tsi)
{
struct mdt_thread_info *info;
ENTRY;
info = tsi2mdt_info(tsi);
if (!info)
RETURN(err_serious(-EACCES));
if (!mdt_changelog_allow(info, tsi->tsi_exp))
RETURN(err_serious(-EACCES));
RETURN(tgt_llog_open(tsi));
}
static int mdt_changelog_get_user_info(struct tgt_session_info *tsi)
{
struct mdt_thread_info *info = tsi2mdt_info(tsi);
struct mdt_device *mdt = info->mti_mdt;
struct changelog_filter *in;
struct changelog_filter *out;
int rc = 0;
ENTRY;
/* Get data from request */
in = req_capsule_client_get(tsi->tsi_pill, &RMF_GETINFO_VAL);
if (in == NULL) {
DEBUG_REQ(D_IOCTL, tgt_ses_req(tsi), "no GETINFO VAL");
RETURN(err_serious(-EPROTO));
}
/* Set reply size and prepare for reply data */
req_capsule_set_size(tsi->tsi_pill, &RMF_GETINFO_VAL, RCL_SERVER,
sizeof(struct changelog_filter));
rc = req_capsule_server_pack(tsi->tsi_pill);
if (rc)
RETURN(err_serious(rc));
out = req_capsule_server_get(tsi->tsi_pill, &RMF_GETINFO_VAL);
if (out == NULL)
RETURN(err_serious(-EPROTO));
/* Forward to MDD layer */
rc = mdt->mdt_child->md_ops->mdo_iocontrol(info->mti_env,
mdt->mdt_child,
OBD_IOC_CHANGELOG_FILTER,
sizeof(*in), in);
out->cf_mask = in->cf_mask;
out->cf_user_id = in->cf_user_id;
strscpy(out->cf_username, in->cf_username, sizeof(out->cf_username));
mdt_thread_info_fini(info);
RETURN(rc);
}
#define OBD_FAIL_OST_READ_NET OBD_FAIL_OST_BRW_NET
#define OBD_FAIL_OST_WRITE_NET OBD_FAIL_OST_BRW_NET
#define OST_BRW_READ OST_READ
#define OST_BRW_WRITE OST_WRITE
static struct tgt_handler mdt_tgt_handlers[] = {
TGT_RPC_HANDLER(MDS_FIRST_OPC,
0, MDS_CONNECT, mdt_tgt_connect,
&RQF_CONNECT, LUSTRE_OBD_VERSION),
TGT_RPC_HANDLER(MDS_FIRST_OPC,
0, MDS_DISCONNECT, tgt_disconnect,
&RQF_MDS_DISCONNECT, LUSTRE_OBD_VERSION),
TGT_RPC_HANDLER(MDS_FIRST_OPC,
HAS_REPLY, MDS_SET_INFO, mdt_set_info,
&RQF_MDT_SET_INFO, LUSTRE_MDS_VERSION),
TGT_MDT_HDL(0, MDS_GET_INFO, mdt_get_info),
TGT_MDT_HDL(HAS_REPLY, MDS_GET_ROOT, mdt_get_root),
TGT_MDT_HDL(HAS_BODY, MDS_GETATTR, mdt_getattr),
TGT_MDT_HDL(HAS_BODY | HAS_REPLY, MDS_GETATTR_NAME,
mdt_getattr_name),
TGT_MDT_HDL(HAS_BODY, MDS_GETXATTR, mdt_tgt_getxattr),
TGT_MDT_HDL(HAS_REPLY, MDS_STATFS, mdt_statfs),
TGT_MDT_HDL(IS_MUTABLE, MDS_REINT, mdt_reint),
TGT_MDT_HDL(HAS_BODY, MDS_CLOSE, mdt_close),
TGT_MDT_HDL(HAS_BODY | HAS_REPLY, MDS_READPAGE, mdt_readpage),
TGT_MDT_HDL(HAS_BODY | HAS_REPLY, MDS_SYNC, mdt_sync),
TGT_MDT_HDL(0, MDS_QUOTACTL, mdt_quotactl),
TGT_MDT_HDL(HAS_BODY | HAS_REPLY | IS_MUTABLE, MDS_HSM_PROGRESS,
mdt_hsm_progress),
TGT_MDT_HDL(HAS_BODY | HAS_REPLY | IS_MUTABLE, MDS_HSM_CT_REGISTER,
mdt_hsm_ct_register),
TGT_MDT_HDL(HAS_BODY | HAS_REPLY | IS_MUTABLE, MDS_HSM_CT_UNREGISTER,
mdt_hsm_ct_unregister),
TGT_MDT_HDL(HAS_BODY | HAS_REPLY, MDS_HSM_STATE_GET,
mdt_hsm_state_get),
TGT_MDT_HDL(HAS_BODY | HAS_REPLY | IS_MUTABLE, MDS_HSM_STATE_SET,
mdt_hsm_state_set),
TGT_MDT_HDL(HAS_BODY | HAS_REPLY, MDS_HSM_ACTION, mdt_hsm_action),
TGT_MDT_HDL(HAS_BODY | HAS_REPLY, MDS_HSM_REQUEST,
mdt_hsm_request),
TGT_MDT_HDL(HAS_KEY | HAS_BODY | HAS_REPLY | IS_MUTABLE,
MDS_SWAP_LAYOUTS, mdt_swap_layouts),
TGT_MDT_HDL(HAS_BODY | HAS_REPLY | IS_MUTABLE, MDS_HSM_DATA_VERSION,
mdt_hsm_data_version),
TGT_MDT_HDL(IS_MUTABLE, MDS_RMFID, mdt_rmfid),
TGT_MDT_HDL(IS_MUTABLE, MDS_BATCH, mdt_batch),
};
static struct tgt_handler mdt_io_ops[] = {
TGT_OST_HDL_HP(HAS_BODY | HAS_REPLY, OST_BRW_READ, tgt_brw_read,
mdt_hp_brw),
TGT_OST_HDL_HP(HAS_BODY | IS_MUTABLE, OST_BRW_WRITE, tgt_brw_write,
mdt_hp_brw),
TGT_OST_HDL_HP(HAS_BODY | HAS_REPLY | IS_MUTABLE,
OST_PUNCH, mdt_punch_hdl,
mdt_hp_punch),
TGT_OST_HDL(HAS_BODY | HAS_REPLY, OST_SYNC, mdt_data_sync),
TGT_OST_HDL(HAS_BODY | HAS_REPLY | IS_MUTABLE, OST_FALLOCATE,
mdt_fallocate_hdl),
TGT_OST_HDL(HAS_BODY | HAS_REPLY, OST_SEEK, tgt_lseek),
TGT_RPC_HANDLER(OST_FIRST_OPC,
0, OST_SET_INFO, mdt_io_set_info,
&RQF_OBD_SET_INFO, LUSTRE_OST_VERSION),
};
static struct tgt_handler mdt_sec_ctx_ops[] = {
TGT_SEC_HDL_VAR(0, SEC_CTX_INIT, mdt_sec_ctx_handle),
TGT_SEC_HDL_VAR(0, SEC_CTX_INIT_CONT, mdt_sec_ctx_handle),
TGT_SEC_HDL_VAR(0, SEC_CTX_FINI, mdt_sec_ctx_handle)
};
static struct tgt_handler mdt_quota_ops[] = {
TGT_QUOTA_HDL(HAS_REPLY, QUOTA_DQACQ, mdt_quota_dqacq),
};
static struct tgt_handler mdt_llog_handlers[] = {
TGT_LLOG_HDL(0, LLOG_ORIGIN_HANDLE_CREATE, mdt_llog_open),
TGT_LLOG_HDL(0, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, tgt_llog_next_block),
TGT_LLOG_HDL(0, LLOG_ORIGIN_HANDLE_READ_HEADER, tgt_llog_read_header),
TGT_LLOG_HDL(0, LLOG_ORIGIN_HANDLE_PREV_BLOCK, tgt_llog_prev_block),
};
static struct tgt_opc_slice mdt_common_slice[] = {
{
.tos_opc_start = MDS_FIRST_OPC,
.tos_opc_end = MDS_LAST_OPC,
.tos_hs = mdt_tgt_handlers
},
{
.tos_opc_start = OBD_FIRST_OPC,
.tos_opc_end = OBD_LAST_OPC,
.tos_hs = tgt_obd_handlers
},
{
.tos_opc_start = LDLM_FIRST_OPC,
.tos_opc_end = LDLM_LAST_OPC,
.tos_hs = tgt_dlm_handlers
},
{
.tos_opc_start = SEC_FIRST_OPC,
.tos_opc_end = SEC_LAST_OPC,
.tos_hs = mdt_sec_ctx_ops
},
{
.tos_opc_start = OUT_UPDATE_FIRST_OPC,
.tos_opc_end = OUT_UPDATE_LAST_OPC,
.tos_hs = tgt_out_handlers
},
{
.tos_opc_start = FLD_FIRST_OPC,
.tos_opc_end = FLD_LAST_OPC,
.tos_hs = fld_handlers
},
{
.tos_opc_start = SEQ_FIRST_OPC,
.tos_opc_end = SEQ_LAST_OPC,
.tos_hs = seq_handlers
},
{
.tos_opc_start = QUOTA_DQACQ,
.tos_opc_end = QUOTA_LAST_OPC,
.tos_hs = mdt_quota_ops
},
{
.tos_opc_start = LLOG_FIRST_OPC,
.tos_opc_end = LLOG_LAST_OPC,
.tos_hs = mdt_llog_handlers
},
{
.tos_opc_start = LFSCK_FIRST_OPC,
.tos_opc_end = LFSCK_LAST_OPC,
.tos_hs = tgt_lfsck_handlers
},
{
.tos_opc_start = OST_FIRST_OPC,
.tos_opc_end = OST_LAST_OPC,
.tos_hs = mdt_io_ops
},
{
.tos_hs = NULL
}
};
static void mdt_fini(const struct lu_env *env, struct mdt_device *m)
{
struct md_device *next = m->mdt_child;
struct lu_device *d = &m->mdt_lu_dev;
struct obd_device *obd = mdt2obd_dev(m);
struct lfsck_stop stop;
ENTRY;
stop.ls_status = LS_PAUSED;
stop.ls_flags = 0;
next->md_ops->mdo_iocontrol(env, next, OBD_IOC_STOP_LFSCK, 0, &stop);
mdt_stack_pre_fini(env, m, md2lu_dev(m->mdt_child));
mdt_restriper_stop(m);
ping_evictor_stop();
/* Remove the HSM /proc entry so the coordinator cannot be
* restarted by a user while it's shutting down.
*/
mdt_hsm_cdt_stop(m);
mdt_llog_ctxt_unclone(env, m, LLOG_AGENT_ORIG_CTXT);
mdt_llog_ctxt_unclone(env, m, LLOG_CHANGELOG_ORIG_CTXT);
target_recovery_fini(obd);
if (m->mdt_namespace != NULL)
ldlm_namespace_free_prior(m->mdt_namespace, NULL,
test_bit(OBDF_FORCE, d->ld_obd->obd_flags));
mdt_quota_fini(env, m);
obd_exports_barrier(obd);
obd_zombie_barrier();
cfs_free_nidlist(&m->mdt_squash.rsi_nosquash_nids);
/* Calling the cleanup functions in the same order as in the mdt_init0
* error path
*/
mdt_tunables_fini(m);
upcall_cache_cleanup(m->mdt_identity_cache);
m->mdt_identity_cache = NULL;
upcall_cache_cleanup(m->mdt_identity_cache_int);
m->mdt_identity_cache_int = NULL;
tgt_fini(env, &m->mdt_lut);
mdt_hsm_cdt_fini(m);
if (m->mdt_los != NULL) {
local_oid_storage_fini(env, m->mdt_los);
m->mdt_los = NULL;
}
if (m->mdt_namespace != NULL) {
ldlm_namespace_free_post(m->mdt_namespace);
d->ld_obd->obd_namespace = m->mdt_namespace = NULL;
}
if (m->mdt_md_root != NULL) {
mdt_object_put(env, m->mdt_md_root);
m->mdt_md_root = NULL;
}
mdt_seq_fini(env, m);
mdt_fld_fini(env, m);
/*
* Finish the stack
*/
mdt_stack_fini(env, m, md2lu_dev(m->mdt_child));
LASSERT(atomic_read(&d->ld_ref) == 0);
server_put_mount(mdt_obd_name(m), true);
EXIT;
}
static int mdt_postrecov(const struct lu_env *, struct mdt_device *);
static int mdt_init0(const struct lu_env *env, struct mdt_device *m,
struct lu_device_type *ldt, struct lustre_cfg *cfg)
{
const struct dt_device_param *dt_conf;
struct mdt_thread_info *info;
struct obd_device *obd;
const char *dev = lustre_cfg_string(cfg, 0);
const char *num = lustre_cfg_string(cfg, 2);
struct tg_grants_data *tgd = &m->mdt_lut.lut_tgd;
struct lustre_mount_info *lmi = NULL;
struct lustre_sb_info *lsi;
struct lu_site *s;
struct seq_server_site *ss_site;
const char *identity_upcall = "NONE";
char cache_internal[NAME_MAX + 1] = { 0 };
struct md_device *next;
struct lu_fid fid;
int rc;
long node_id;
mntopt_t mntopts;
ENTRY;
lu_device_init(&m->mdt_lu_dev, ldt);
/*
* Environment (env) might be missing mdt_thread_key values at that
* point, if device is allocated when mdt_thread_key is in QUIESCENT
* mode.
*
* Usually device allocation path doesn't use module key values, but
* mdt has to do a lot of work here, so allocate key value.
*/
rc = lu_env_refill((struct lu_env *)env);
if (rc != 0)
RETURN(rc);
info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
LASSERT(info != NULL);
obd = class_name2obd(dev);
LASSERT(obd != NULL);
m->mdt_max_mdsize = MAX_MD_SIZE_OLD;
m->mdt_evict_tgt_nids = 1;
m->mdt_opts.mo_cos = MDT_COS_DEFAULT;
lmi = server_get_mount(dev);
if (lmi == NULL) {
CERROR("Cannot get mount info for %s!\n", dev);
RETURN(-EFAULT);
} else {
lsi = s2lsi(lmi->lmi_sb);
LASSERT(lsi->lsi_lmd);
/* CMD is supported only in IAM mode */
LASSERT(num);
rc = kstrtol(num, 10, &node_id);
if (rc)
RETURN(rc);
obd_obt_init(obd);
if (test_bit(LMD_FLG_SKIP_LFSCK, lsi->lsi_lmd->lmd_flags))
m->mdt_skip_lfsck = 1;
if (test_bit(LMD_FLG_NO_CREATE, lsi->lsi_lmd->lmd_flags))
m->mdt_lut.lut_no_create = 1;
}
/* Just try to get a DoM lock by default. Otherwise, having a group
* lock granted, it may get blocked for a long time.
*/
m->mdt_opts.mo_dom_lock = TRYLOCK_DOM_ON_OPEN;
/* DoM files are read at open and data is packed in the reply */
m->mdt_dom_read_open = 1;
m->mdt_squash.rsi_uid = 0;
m->mdt_squash.rsi_gid = 0;
INIT_LIST_HEAD(&m->mdt_squash.rsi_nosquash_nids);
spin_lock_init(&m->mdt_squash.rsi_lock);
spin_lock_init(&m->mdt_lock);
m->mdt_enable_chprojid_gid = 0;
m->mdt_enable_dir_migration = 1;
m->mdt_enable_dir_restripe = 0;
m->mdt_enable_dir_auto_split = 0;
m->mdt_enable_foreign_dir = 1;
m->mdt_enable_foreign_dir_gid = -1;
m->mdt_enable_parallel_rename_dir = 1;
m->mdt_enable_parallel_rename_file = 1;
m->mdt_enable_parallel_rename_crossdir = 1;
m->mdt_enable_pin_gid = 0;
m->mdt_enable_remote_dir = 1;
m->mdt_enable_remote_dir_gid = 0;
m->mdt_enable_remote_rename = 1;
m->mdt_enable_rename_trylock = 1;
m->mdt_enable_striped_dir = 1;
m->mdt_enable_dmv_implicit_inherit = 1;
m->mdt_dir_restripe_nsonly = 1;
m->mdt_max_mod_rpcs_in_flight = OBD_MAX_RIF_DEFAULT;
atomic_set(&m->mdt_mds_mds_conns, 0);
atomic_set(&m->mdt_async_commit_count, 0);
atomic_set(&m->mdt_dmv_old_client_count, 0);
m->mdt_lu_dev.ld_ops = &mdt_lu_ops;
m->mdt_lu_dev.ld_obd = obd;
/* Set this lu_device to obd for error handling purposes. */
obd->obd_lu_dev = &m->mdt_lu_dev;
strncpy(m->mdt_job_xattr, XATTR_NAME_JOB_DEFAULT, XATTR_JOB_MAX_LEN);
/* init the stack */
rc = mdt_stack_init((struct lu_env *)env, m, cfg);
if (rc) {
CERROR("%s: Can't init device stack, rc %d\n",
mdt_obd_name(m), rc);
GOTO(err_lmi, rc);
}
s = mdt_lu_site(m);
ss_site = mdt_seq_site(m);
s->ld_seq_site = ss_site;
ss_site->ss_lu = s;
/* set server index */
ss_site->ss_node_id = node_id;
/* failover is the default
* FIXME: we do not failout mds0/mgs, which may cause some problems.
* assumed whose ss_node_id == 0 XXX
*/
set_bit(OBDF_REPLAYABLE, obd->obd_flags);
/* No connection accepted until configurations will finish */
obd->obd_no_conn = 1;
if (cfg->lcfg_bufcount > 4 && LUSTRE_CFG_BUFLEN(cfg, 4) > 0) {
char *str = lustre_cfg_string(cfg, 4);
if (strchr(str, 'n')) {
CWARN("%s: recovery disabled\n", mdt_obd_name(m));
clear_bit(OBDF_REPLAYABLE, obd->obd_flags);
}
}
rc = mdt_fld_init(env, mdt_obd_name(m), m);
if (rc)
GOTO(err_fini_stack, rc);
rc = mdt_seq_init(env, m);
if (rc)
GOTO(err_fini_fld, rc);
snprintf(info->mti_u.ns_name, sizeof(info->mti_u.ns_name), "%s-%s",
LUSTRE_MDT_NAME, obd->obd_uuid.uuid);
m->mdt_namespace = ldlm_namespace_new(obd, info->mti_u.ns_name,
LDLM_NAMESPACE_SERVER,
LDLM_NAMESPACE_GREEDY,
LDLM_NS_TYPE_MDT);
if (IS_ERR(m->mdt_namespace)) {
rc = PTR_ERR(m->mdt_namespace);
CERROR("%s: unable to create server namespace: rc = %d\n",
obd->obd_name, rc);
m->mdt_namespace = NULL;
GOTO(err_fini_seq, rc);
}
m->mdt_namespace->ns_lvbp = m;
m->mdt_namespace->ns_lvbo = &mdt_lvbo;
ldlm_register_intent(m->mdt_namespace, mdt_intent_policy);
/* set obd_namespace for compatibility with old code */
obd->obd_namespace = m->mdt_namespace;
rc = tgt_init(env, &m->mdt_lut, obd, m->mdt_bottom, mdt_common_slice,
OBD_FAIL_MDS_ALL_REQUEST_NET,
OBD_FAIL_MDS_ALL_REPLY_NET);
if (rc)
GOTO(err_free_ns, rc);
/* Amount of available space excluded from granting and reserved
* for metadata. It is a percentage of the total MDT size.
*/
tgd->tgd_reserved_pcnt = 10;
if (ONE_MB_BRW_SIZE < (1U << tgd->tgd_blockbits))
m->mdt_brw_size = 1U << tgd->tgd_blockbits;
else
m->mdt_brw_size = ONE_MB_BRW_SIZE;
if (CFS_FAIL_CHECK(OBD_FAIL_MDS_FS_SETUP))
GOTO(err_tgt, rc = -ENOENT);
fid.f_seq = FID_SEQ_LOCAL_NAME;
fid.f_oid = 1;
fid.f_ver = 0;
rc = local_oid_storage_init(env, m->mdt_bottom, &fid, &m->mdt_los);
if (rc != 0)
GOTO(err_tgt, rc);
rc = mdt_hsm_cdt_init(m);
if (rc != 0) {
CERROR("%s: error initializing coordinator, rc %d\n",
mdt_obd_name(m), rc);
GOTO(err_los_fini, rc);
}
tgt_adapt_sptlrpc_conf(&m->mdt_lut);
next = m->mdt_child;
dt_conf = next->md_ops->mdo_dtconf_get(env, next);
mntopts = dt_conf->ddp_mntopts;
if (mntopts & MNTOPT_USERXATTR)
m->mdt_opts.mo_user_xattr = 1;
else
m->mdt_opts.mo_user_xattr = 0;
m->mdt_max_ea_size = dt_conf->ddp_max_ea_size;
if (mntopts & MNTOPT_ACL)
m->mdt_opts.mo_acl = 1;
else
m->mdt_opts.mo_acl = 0;
m->mdt_enable_strict_som = 1;
/* XXX: to support suppgid for ACL, we enable identity_upcall
* by default, otherwise, maybe got unexpected -EACCESS.
*/
if (m->mdt_opts.mo_acl)
identity_upcall = MDT_IDENTITY_UPCALL_PATH;
m->mdt_identity_cache = upcall_cache_init(mdt_obd_name(m),
identity_upcall,
UC_IDCACHE_HASH_SIZE,
1200, /* entry expire: 20 mn */
30, /* acquire expire: 30 s */
true, /* acquire can replay */
&mdt_identity_upcall_cache_ops);
if (IS_ERR(m->mdt_identity_cache)) {
rc = PTR_ERR(m->mdt_identity_cache);
m->mdt_identity_cache = NULL;
GOTO(err_free_hsm, rc);
}
snprintf(cache_internal, sizeof(cache_internal), "%s_int",
mdt_obd_name(m));
m->mdt_identity_cache_int = upcall_cache_init(cache_internal,
IDENTITY_UPCALL_INTERNAL,
UC_IDCACHE_HASH_SIZE,
1200, /* entry expire: 20 mn */
30, /* acquire expire: 30 s */
true, /* acquire can replay */
&mdt_identity_upcall_cache_ops);
if (IS_ERR(m->mdt_identity_cache_int)) {
rc = PTR_ERR(m->mdt_identity_cache_int);
m->mdt_identity_cache_int = NULL;
GOTO(err_cache, rc);
}
rc = mdt_tunables_init(m, dev);
if (rc) {
CERROR("Can't init MDT lprocfs, rc %d\n", rc);
GOTO(err_recovery, rc);
}
rc = mdt_quota_init(env, m, cfg);
if (rc)
GOTO(err_procfs, rc);
m->mdt_ldlm_client = &mdt2obd_dev(m)->obd_ldlm_client;
ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
"mdt_ldlm_client", m->mdt_ldlm_client);
ping_evictor_start();
/* recovery will be started upon mdt_prepare() when the whole stack is
* complete and ready to serve the requests
*/
/* Reduce the initial timeout on an MDS because it doesn't need such
* a long timeout as an OST does. Adaptive timeouts will adjust this
* value appropriately.
*/
if (ldlm_timeout == LDLM_TIMEOUT_DEFAULT)
ldlm_timeout = MDS_LDLM_TIMEOUT_DEFAULT;
if (test_bit(LMD_FLG_LOCAL_RECOV, lsi->lsi_lmd->lmd_flags))
m->mdt_lut.lut_local_recovery = 1;
rc = mdt_restriper_start(m);
if (rc)
GOTO(err_ping_evictor, rc);
RETURN(0);
err_ping_evictor:
ping_evictor_stop();
err_procfs:
mdt_tunables_fini(m);
err_recovery:
upcall_cache_cleanup(m->mdt_identity_cache_int);
m->mdt_identity_cache_int = NULL;
err_cache:
upcall_cache_cleanup(m->mdt_identity_cache);
m->mdt_identity_cache = NULL;
err_free_hsm:
mdt_hsm_cdt_fini(m);
err_los_fini:
local_oid_storage_fini(env, m->mdt_los);
m->mdt_los = NULL;
err_tgt:
/* keep recoverable clients */
set_bit(OBDF_FAIL, obd->obd_flags);
target_recovery_fini(obd);
obd_exports_barrier(obd);
obd_zombie_barrier();
tgt_fini(env, &m->mdt_lut);
err_free_ns:
ldlm_namespace_free(m->mdt_namespace, NULL, 0);
obd->obd_namespace = m->mdt_namespace = NULL;
err_fini_seq:
mdt_seq_fini(env, m);
err_fini_fld:
mdt_fld_fini(env, m);
err_fini_stack:
mdt_stack_fini(env, m, md2lu_dev(m->mdt_child));
err_lmi:
if (lmi)
server_put_mount(dev, true);
return rc;
}
/* For interoperability, the left element is old parameter, the right one
* is the new version of the parameter, if some parameter is deprecated,
* the new version should be set as NULL.
*/
static struct cfg_interop_param mdt_interop_param[] = {
{ "mdt.group_upcall", NULL },
{ "mdt.quota_type", NULL },
{ "mdd.quota_type", NULL },
{ "mdt.som", NULL },
{ "mdt.rootsquash", "mdt.root_squash" },
{ "mdt.nosquash_nid", "mdt.nosquash_nids" },
{ NULL }
};
/* used by MGS to process specific configurations */
static int mdt_process_config(const struct lu_env *env,
struct lu_device *d, struct lustre_cfg *cfg)
{
struct mdt_device *m = mdt_dev(d);
struct md_device *md_next = m->mdt_child;
struct lu_device *next = md2lu_dev(md_next);
int rc;
ENTRY;
switch (cfg->lcfg_command) {
case LCFG_PARAM: {
struct obd_device *obd = d->ld_obd;
/* For interoperability */
struct cfg_interop_param *ptr = NULL;
struct lustre_cfg *old_cfg = NULL;
char *param = NULL;
ssize_t count;
param = lustre_cfg_string(cfg, 1);
if (param == NULL) {
CERROR("param is empty\n");
rc = -EINVAL;
break;
}
ptr = class_find_old_param(param, mdt_interop_param);
if (ptr != NULL) {
if (ptr->new_param == NULL) {
rc = 0;
CWARN("For interoperability, skip this %s. It is obsolete.\n",
ptr->old_param);
break;
}
CWARN("Found old param %s, changed it to %s.\n",
ptr->old_param, ptr->new_param);
old_cfg = cfg;
cfg = lustre_cfg_rename(old_cfg, ptr->new_param);
if (IS_ERR(cfg)) {
rc = PTR_ERR(cfg);
break;
}
}
count = class_modify_config(cfg, PARAM_MDT,
&obd->obd_kset.kobj);
if (count < 0) {
struct coordinator *cdt = &m->mdt_coordinator;
/* is it an HSM var ? */
count = class_modify_config(cfg, PARAM_HSM,
&cdt->cdt_hsm_kobj);
if (count < 0)
/* we don't understand; pass it on */
rc = next->ld_ops->ldo_process_config(env, next,
cfg);
else
rc = count > 0 ? 0 : count;
} else {
rc = count > 0 ? 0 : count;
}
if (old_cfg)
OBD_FREE(cfg, lustre_cfg_len(cfg->lcfg_bufcount,
cfg->lcfg_buflens));
break;
}
default:
/* others are passed further */
rc = next->ld_ops->ldo_process_config(env, next, cfg);
break;
}
RETURN(rc);
}
static struct lu_object *mdt_object_alloc(const struct lu_env *env,
const struct lu_object_header *hdr,
struct lu_device *d)
{
struct mdt_object *mo;
ENTRY;
OBD_SLAB_ALLOC_PTR_GFP(mo, mdt_object_kmem, GFP_NOFS);
if (mo != NULL) {
struct lu_object *o;
struct lu_object_header *h;
o = &mo->mot_obj;
h = &mo->mot_header;
lu_object_header_init(h);
lu_object_init(o, h, d);
lu_object_add_top(h, o);
o->lo_ops = &mdt_obj_ops;
spin_lock_init(&mo->mot_write_lock);
mutex_init(&mo->mot_som_mutex);
mutex_init(&mo->mot_lov_mutex);
init_rwsem(&mo->mot_dom_sem);
init_rwsem(&mo->mot_open_sem);
atomic_set(&mo->mot_open_count, 0);
mo->mot_restripe_offset = 0;
INIT_LIST_HEAD(&mo->mot_restripe_linkage);
mo->mot_lsom_size = 0;
mo->mot_lsom_blocks = 0;
mo->mot_lsom_inited = false;
mo->mot_discard_done = false;
RETURN(o);
}
RETURN(NULL);
}
static int mdt_object_init(const struct lu_env *env, struct lu_object *o,
const struct lu_object_conf *unused)
{
struct mdt_device *d = mdt_dev(o->lo_dev);
struct lu_device *under;
struct lu_object *below;
int rc = 0;
ENTRY;
CDEBUG(D_INFO, "object init, fid = "DFID"\n",
PFID(lu_object_fid(o)));
under = &d->mdt_child->md_lu_dev;
below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
if (below != NULL)
lu_object_add(o, below);
else
rc = -ENOMEM;
RETURN(rc);
}
static void mdt_object_free_rcu(struct rcu_head *head)
{
struct mdt_object *mo = container_of(head, struct mdt_object,
mot_header.loh_rcu);
kmem_cache_free(mdt_object_kmem, mo);
}
static void mdt_object_free(const struct lu_env *env, struct lu_object *o)
{
struct mdt_object *mo = mdt_obj(o);
struct lu_object_header *h;
ENTRY;
h = o->lo_header;
CDEBUG(D_INFO, "object free, fid = "DFID"\n",
PFID(lu_object_fid(o)));
LASSERT(atomic_read(&mo->mot_open_count) == 0);
LASSERT(atomic_read(&mo->mot_lease_count) == 0);
lu_object_fini(o);
lu_object_header_fini(h);
OBD_FREE_PRE(mo, sizeof(*mo), "slab-freed");
call_rcu(&mo->mot_header.loh_rcu, mdt_object_free_rcu);
EXIT;
}
static int mdt_object_print(const struct lu_env *env, void *cookie,
lu_printer_t p, const struct lu_object *o)
{
struct mdt_object *mdto = mdt_obj((struct lu_object *)o);
return (*p)(env, cookie,
LUSTRE_MDT_NAME"-object@%p(%s %s, writecount=%d)",
mdto, mdto->mot_lov_created ? "lov_created" : "",
mdto->mot_cache_attr ? "cache_attr" : "",
mdto->mot_write_count);
}
static int mdt_prepare(const struct lu_env *env,
struct lu_device *pdev,
struct lu_device *cdev)
{
struct mdt_device *mdt = mdt_dev(cdev);
struct lu_device *next = &mdt->mdt_child->md_lu_dev;
struct obd_device *obd = cdev->ld_obd;
int rc;
ENTRY;
LASSERT(obd);
rc = next->ld_ops->ldo_prepare(env, cdev, next);
if (rc)
RETURN(rc);
rc = mdt_llog_ctxt_clone(env, mdt, LLOG_CHANGELOG_ORIG_CTXT);
if (rc)
RETURN(rc);
rc = mdt_llog_ctxt_clone(env, mdt, LLOG_AGENT_ORIG_CTXT);
if (rc)
RETURN(rc);
rc = lfsck_register_namespace(env, mdt->mdt_bottom, mdt->mdt_namespace);
/* The LFSCK instance is registered just now, so it must be there when
* register the namespace to such instance.
*/
LASSERTF(rc == 0, "register namespace failed: rc = %d\n", rc);
if (mdt->mdt_seq_site.ss_node_id == 0) {
rc = mdt->mdt_child->md_ops->mdo_root_get(env, mdt->mdt_child,
&mdt->mdt_md_root_fid);
if (rc)
RETURN(rc);
}
LASSERT(!test_bit(MDT_FL_CFGLOG, &mdt->mdt_state));
target_recovery_init(&mdt->mdt_lut, tgt_request_handle);
set_bit(MDT_FL_CFGLOG, &mdt->mdt_state);
LASSERT(obd->obd_no_conn);
spin_lock(&obd->obd_dev_lock);
obd->obd_no_conn = 0;
spin_unlock(&obd->obd_dev_lock);
if (!test_bit(OBDF_RECOVERING, obd->obd_flags))
mdt_postrecov(env, mdt);
RETURN(rc);
}
const struct lu_device_operations mdt_lu_ops = {
.ldo_object_alloc = mdt_object_alloc,
.ldo_process_config = mdt_process_config,
.ldo_prepare = mdt_prepare,
};
static const struct lu_object_operations mdt_obj_ops = {
.loo_object_init = mdt_object_init,
.loo_object_free = mdt_object_free,
.loo_object_print = mdt_object_print
};
static int mdt_obd_set_info_async(const struct lu_env *env,
struct obd_export *exp,
__u32 keylen, void *key,
__u32 vallen, void *val,
struct ptlrpc_request_set *set)
{
int rc;
ENTRY;
if (KEY_IS(KEY_SPTLRPC_CONF)) {
rc = tgt_adapt_sptlrpc_conf(class_exp2tgt(exp));
RETURN(rc);
}
RETURN(0);
}
static inline void mdt_enable_slc(struct mdt_device *mdt)
{
if (mdt->mdt_lut.lut_sync_lock_cancel == SYNC_LOCK_CANCEL_NEVER)
mdt->mdt_lut.lut_sync_lock_cancel = SYNC_LOCK_CANCEL_BLOCKING;
}
static inline void mdt_disable_slc(struct mdt_device *mdt)
{
if (mdt->mdt_lut.lut_sync_lock_cancel == SYNC_LOCK_CANCEL_BLOCKING)
mdt->mdt_lut.lut_sync_lock_cancel = SYNC_LOCK_CANCEL_NEVER;
}
/**
* Match client and server connection feature flags.
*
* Compute the compatibility flags for a connection request based on
* features mutually supported by client and server.
*
* The obd_export::exp_connect_data.ocd_connect_flags field in \a exp
* must not be updated here, otherwise a partially initialized value may
* be exposed. After the connection request is successfully processed,
* the top-level MDT connect request handler atomically updates the export
* connect flags from the obd_connect_data::ocd_connect_flags field of the
* reply. \see mdt_connect().
*
* Before 2.7.50 clients will send a struct obd_connect_data_v1 rather than a
* full struct obd_connect_data. So care must be taken when accessing fields
* that are not present in struct obd_connect_data_v1. See LU-16.
*
* \param exp the obd_export associated with this client/target pair
* \param mdt the target device for the connection
* \param data stores data for this connect request
*
* \retval 0 success
* \retval -EPROTO \a data unexpectedly has zero obd_connect_data::ocd_brw_size
* \retval -EBADE client and server feature requirements are incompatible
*/
static int mdt_connect_internal(const struct lu_env *env,
struct obd_export *exp,
struct mdt_device *mdt,
struct obd_connect_data *data, bool reconnect)
{
const char *obd_name = mdt_obd_name(mdt);
LASSERT(data != NULL);
data->ocd_connect_flags &= MDT_CONNECT_SUPPORTED;
if (mdt->mdt_bottom->dd_rdonly &&
!(data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) &&
!(data->ocd_connect_flags & OBD_CONNECT_RDONLY))
RETURN(-EACCES);
if (data->ocd_connect_flags & OBD_CONNECT_FLAGS2) {
__u64 supported2 = MDT_CONNECT_SUPPORTED2;
/* Add FLR_EC to supported flags when enabled */
if (mdt_enable_flr_ec)
supported2 |= OBD_CONNECT2_FLR_EC;
data->ocd_connect_flags2 &= supported2;
}
data->ocd_ibits_known &= MDS_INODELOCK_FULL;
if (!mdt->mdt_opts.mo_acl)
data->ocd_connect_flags &= ~OBD_CONNECT_ACL;
if (!mdt->mdt_opts.mo_user_xattr)
data->ocd_connect_flags &= ~OBD_CONNECT_XATTR;
if (OCD_HAS_FLAG(data, BRW_SIZE)) {
data->ocd_brw_size = min(data->ocd_brw_size,
mdt->mdt_brw_size);
if (data->ocd_brw_size == 0) {
CERROR("%s: cli %s/%p ocd_connect_flags: %#llx ocd_version: %x ocd_grant: %d ocd_index: %u ocd_brw_size unexpectedly zero, network data corruption? Refusing to connect this client\n", obd_name, exp->exp_client_uuid.uuid,
exp, data->ocd_connect_flags, data->ocd_version,
data->ocd_grant, data->ocd_index);
return -EPROTO;
}
}
if (OCD_HAS_FLAG(data, GRANT_PARAM)) {
struct dt_device_param *ddp = &mdt->mdt_lut.lut_dt_conf;
/* client is reporting its page size, for future use */
exp->exp_target_data.ted_pagebits = data->ocd_grant_blkbits;
data->ocd_grant_blkbits = mdt->mdt_lut.lut_tgd.tgd_blockbits;
/* ddp_inodespace may not be power-of-two value, eg. for ldiskfs
* it's LDISKFS_DIR_REC_LEN(20) = 28.
*/
data->ocd_grant_inobits = fls(ddp->ddp_inodespace - 1);
/* ocd_grant_tax_kb is in 1K byte blocks */
data->ocd_grant_tax_kb = ddp->ddp_extent_tax >> 10;
data->ocd_grant_max_blks = ddp->ddp_max_extent_blks;
}
/* Save connect_data we have so far because tgt_grant_connect()
* uses it to calculate grant, and we want to save the client
* version before it is overwritten by LUSTRE_VERSION_CODE.
*/
exp->exp_connect_data = *data;
if (OCD_HAS_FLAG(data, GRANT))
tgt_grant_connect(env, exp, data, !reconnect);
if (OCD_HAS_FLAG(data, MAXBYTES))
data->ocd_maxbytes = mdt->mdt_lut.lut_dt_conf.ddp_maxbytes;
/* NB: Disregard the rule against updating
* exp_connect_data.ocd_connect_flags in this case, since
* tgt_client_new() needs to know if this is a lightweight
* connection, and it is safe to expose this flag before
* connection processing completes.
*/
if (data->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT) {
spin_lock(&exp->exp_lock);
*exp_connect_flags_ptr(exp) |= OBD_CONNECT_LIGHTWEIGHT;
spin_unlock(&exp->exp_lock);
}
data->ocd_version = LUSTRE_VERSION_CODE;
if ((data->ocd_connect_flags & OBD_CONNECT_FID) == 0) {
CWARN("%s: MDS requires FID support, but client not\n",
obd_name);
return -EBADE;
}
if (OCD_HAS_FLAG(data, PINGLESS) && !ptlrpc_pinger_suppress_pings())
data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
/* Because we do not want this export to be evicted by pinger,
* let's not add this export to the timed chain list. */
if (!OCD_HAS_FLAG(data, PINGLESS) &&
!(data->ocd_connect_flags & OBD_CONNECT_MDS_MDS)) {
spin_lock(&exp->exp_lock);
exp->exp_timed = 1;
spin_unlock(&exp->exp_lock);
}
data->ocd_max_easize = mdt->mdt_max_ea_size;
/* NB: Disregard the rule against updating
* exp_connect_data.ocd_connect_flags in this case, since
* tgt_client_new() needs to know if this is client supports
* multiple modify RPCs, and it is safe to expose this flag before
* connection processing completes.
*/
if (data->ocd_connect_flags & OBD_CONNECT_MULTIMODRPCS) {
if (mdt_max_mod_rpcs_changed(mdt))
/* The new mdt.*.max_mod_rpcs_in_flight parameter
* has not changed since initialization, but the
* deprecated module parameter was changed,
* so use that instead.
*/
data->ocd_maxmodrpcs = max_mod_rpcs_per_client;
else
data->ocd_maxmodrpcs = mdt->mdt_max_mod_rpcs_in_flight;
spin_lock(&exp->exp_lock);
*exp_connect_flags_ptr(exp) |= OBD_CONNECT_MULTIMODRPCS;
spin_unlock(&exp->exp_lock);
}
if (OCD_HAS_FLAG(data, CKSUM)) {
__u32 cksum_types = data->ocd_cksum_types;
tgt_mask_cksum_types(&mdt->mdt_lut, &data->ocd_cksum_types);
if (unlikely(data->ocd_cksum_types == 0)) {
CERROR("%s: Connect with checksum support but no ocd_cksum_types is set\n",
exp->exp_obd->obd_name);
RETURN(-EPROTO);
}
CDEBUG(D_RPCTRACE, "%s: cli %s supports cksum type %x, return %x\n",
exp->exp_obd->obd_name, obd_export_nid2str(exp),
cksum_types, data->ocd_cksum_types);
} else {
/* Client not support OBD_CONNECT_CKSUM? fall back to CRC32 */
CDEBUG(D_RPCTRACE, "%s: cli %s does not support OBD_CONNECT_CKSUM, CRC32 will be used\n",
exp->exp_obd->obd_name, obd_export_nid2str(exp));
}
if ((data->ocd_connect_flags & OBD_CONNECT_MDS_MDS) &&
!(data->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT)) {
atomic_inc(&mdt->mdt_mds_mds_conns);
mdt_enable_slc(mdt);
}
if (!mdt->mdt_lut.lut_dt_conf.ddp_has_lseek_data_hole)
data->ocd_connect_flags2 &= ~OBD_CONNECT2_LSEEK;
if (!OCD_HAS_FLAG(data, MDS_MDS) && !OCD_HAS_FLAG(data, LIGHTWEIGHT) &&
!OCD_HAS_FLAG2(data, DMV_IMP_INHERIT)) {
atomic_inc(&mdt->mdt_dmv_old_client_count);
mdt->mdt_enable_dmv_implicit_inherit = 0;
}
return 0;
}
static int mdt_ctxt_add_dirty_flag(struct lu_env *env,
struct mdt_thread_info *info,
struct mdt_file_data *mfd)
{
struct lu_context ses;
int rc;
ENTRY;
rc = lu_context_init(&ses, LCT_SERVER_SESSION);
if (rc)
RETURN(rc);
env->le_ses = &ses;
lu_context_enter(&ses);
mdt_ucred(info)->uc_valid = UCRED_OLD;
/* do not let rbac interfere with dirty flag internal system event */
mdt_ucred(info)->uc_rbac_file_perms = 1;
mdt_ucred(info)->uc_rbac_dne_ops = 1;
mdt_ucred(info)->uc_rbac_quota_ops = 1;
mdt_ucred(info)->uc_rbac_byfid_ops = 1;
mdt_ucred(info)->uc_rbac_chlg_ops = 1;
mdt_ucred(info)->uc_rbac_fscrypt_admin = 1;
mdt_ucred(info)->uc_rbac_server_upcall = 1;
mdt_ucred(info)->uc_rbac_ignore_root_prjquota = 1;
mdt_ucred(info)->uc_rbac_hsm_ops = 1;
mdt_ucred(info)->uc_rbac_local_admin = 1;
mdt_ucred(info)->uc_rbac_pool_quota_ops = 1;
mdt_ucred(info)->uc_rbac_lqa_quota_ops = 1;
mdt_ucred(info)->uc_rbac_projid_set = 1;
mdt_ucred(info)->uc_rbac_foreign_ops = 1;
mdt_ucred(info)->uc_rbac_immutable_flags = 1;
rc = mdt_add_dirty_flag(info, mfd->mfd_object, &info->mti_attr);
lu_context_exit(&ses);
lu_context_fini(&ses);
env->le_ses = NULL;
RETURN(rc);
}
static int mdt_export_cleanup(struct obd_export *exp)
{
LIST_HEAD(closing_list);
struct mdt_export_data *med = &exp->exp_mdt_data;
struct obd_device *obd = exp->exp_obd;
struct mdt_device *mdt;
struct mdt_thread_info *info;
struct lu_env *env;
struct mdt_file_data *mfd, *n;
int rc = 0;
ENTRY;
spin_lock(&med->med_open_lock);
while (!list_empty(&med->med_open_head)) {
struct list_head *tmp = med->med_open_head.next;
mfd = list_entry(tmp, struct mdt_file_data, mfd_list);
/* Remove mfd handle so it can't be found again.
* We are consuming the mfd_list reference here.
*/
class_handle_unhash(&mfd->mfd_open_handle);
list_move_tail(&mfd->mfd_list, &closing_list);
}
spin_unlock(&med->med_open_lock);
mdt = mdt_dev(obd->obd_lu_dev);
LASSERT(mdt != NULL);
env = lu_env_find();
LASSERT(env);
info = lu_context_key_get(&env->le_ctx, &mdt_thread_key);
LASSERT(info != NULL);
info->mti_env = env;
info->mti_mdt = mdt;
info->mti_exp = exp;
info->mti_pill = NULL;
if (!list_empty(&closing_list)) {
struct md_attr *ma = &info->mti_attr;
/* Close any open files (which may cause orphan unlinking). */
list_for_each_entry_safe(mfd, n, &closing_list, mfd_list) {
list_del_init(&mfd->mfd_list);
ma->ma_need = ma->ma_valid = 0;
/* This file is being closed due to an eviction, it
* could have been modified and now dirty regarding to
* HSM archive, check this!
* The logic here is to mark a file dirty if there's a
* chance it was dirtied before the client was evicted,
* so that we don't have to wait for a release attempt
* before finding out the file was actually dirty and
* fail the release. Aggressively marking it dirty here
* will cause the policy engine to attempt to
* re-archive it; when rearchiving, we can compare the
* current version to the HSM data_version and make the
* archive request into a noop if it's not actually
* dirty.
*/
if (mfd->mfd_open_flags & MDS_FMODE_WRITE)
rc = mdt_ctxt_add_dirty_flag(env, info, mfd);
/* Don't unlink orphan on failover umount, LU-184 */
if (exp->exp_flags & OBD_OPT_FAILOVER ||
test_bit(OBDF_STOPPING, exp->exp_obd->obd_flags)) {
ma->ma_valid = MA_FLAGS;
ma->ma_attr_flags |= MDS_KEEP_ORPHAN;
}
ma->ma_valid |= MA_FORCE_LOG;
mdt_mfd_close(info, mfd);
}
}
mdt_hsm_agent_unregister(info, &exp->exp_client_uuid);
info->mti_mdt = NULL;
/* cleanup client slot early */
/* Do not erase record for recoverable client. */
if (!(exp->exp_flags & OBD_OPT_FAILOVER) || exp->exp_failed)
tgt_client_del(env, exp);
RETURN(rc);
}
static int mdt_obd_disconnect(struct obd_export *exp)
{
struct obd_connect_data *data = &exp->exp_connect_data;
struct mdt_device *mdt = mdt_dev(exp->exp_obd->obd_lu_dev);
int rc;
ENTRY;
LASSERT(exp);
class_export_get(exp);
if (OCD_HAS_FLAG(data, MDS_MDS) && !OCD_HAS_FLAG(data, LIGHTWEIGHT) &&
atomic_dec_and_test(&mdt->mdt_mds_mds_conns))
mdt_disable_slc(mdt);
if (!OCD_HAS_FLAG(data, MDS_MDS) && !OCD_HAS_FLAG(data, LIGHTWEIGHT) &&
!OCD_HAS_FLAG2(data, DMV_IMP_INHERIT) &&
atomic_dec_and_test(&mdt->mdt_dmv_old_client_count))
mdt->mdt_enable_dmv_implicit_inherit = 1;
rc = server_disconnect_export(exp);
if (rc != 0)
CDEBUG(D_IOCTL, "server disconnect error: rc = %d\n", rc);
tgt_grant_discard(exp);
if (!(exp->exp_flags & OBD_OPT_FORCE))
tgt_grant_sanity_check(exp->exp_obd, __func__);
rc = mdt_export_cleanup(exp);
nodemap_del_member(exp);
class_export_put(exp);
RETURN(rc);
}
/* mds_connect copy */
static int mdt_obd_connect(const struct lu_env *env,
struct obd_export **exp, struct obd_device *obd,
struct obd_uuid *cluuid,
struct obd_connect_data *data,
void *localdata)
{
struct ptlrpc_request *req = localdata;
struct ptlrpc_svc_ctx *svc_ctx = NULL;
struct lnet_nid *client_nid = NULL;
struct lustre_handle conn = { 0 };
struct obd_export *lexp;
struct mdt_device *mdt;
int rc;
ENTRY;
LASSERT(env != NULL);
LASSERT(data != NULL);
if (!exp || !obd || !cluuid)
RETURN(-EINVAL);
mdt = mdt_dev(obd->obd_lu_dev);
/*
* first, check whether the stack is ready to handle requests
* XXX: probably not very appropriate method is used now
* at some point we should find a better one
*/
if (!test_bit(MDT_FL_SYNCED, &mdt->mdt_state) &&
!(data->ocd_connect_flags & OBD_CONNECT_LIGHTWEIGHT) &&
!(data->ocd_connect_flags & OBD_CONNECT_MDS_MDS)) {
rc = obd_get_info(env, mdt->mdt_child_exp,
sizeof(KEY_OSP_CONNECTED),
KEY_OSP_CONNECTED, NULL, NULL);
if (rc)
RETURN(-EAGAIN);
set_bit(MDT_FL_SYNCED, &mdt->mdt_state);
}
rc = class_connect(&conn, obd, cluuid);
if (rc)
RETURN(rc);
lexp = class_conn2export(&conn);
LASSERT(lexp != NULL);
if (req) {
svc_ctx = req->rq_svc_ctx;
client_nid = &req->rq_peer.nid;
}
if (svc_ctx || client_nid) {
rc = nodemap_add_member(svc_ctx, client_nid, lexp);
if (rc != 0 && rc != -EEXIST)
GOTO(out, rc);
} else {
CDEBUG(D_HA,
"%s: cannot find nodemap for client %s: svc_ctx and nid are null\n",
obd->obd_name, cluuid->uuid);
}
rc = mdt_connect_internal(env, lexp, mdt, data, false);
if (rc == 0) {
struct lsd_client_data *lcd = lexp->exp_target_data.ted_lcd;
LASSERT(lcd);
memcpy(lcd->lcd_uuid, cluuid, sizeof(lcd->lcd_uuid));
rc = tgt_client_new(env, lexp);
if (rc == 0 && client_nid)
mdt_export_stats_init(obd, lexp, client_nid);
}
out:
if (rc != 0) {
class_disconnect(lexp);
nodemap_del_member(lexp);
*exp = NULL;
} else {
*exp = lexp;
}
RETURN(rc);
}
static int mdt_obd_reconnect(const struct lu_env *env,
struct obd_export *exp, struct obd_device *obd,
struct obd_uuid *cluuid,
struct obd_connect_data *data,
void *localdata)
{
struct ptlrpc_request *req = localdata;
struct ptlrpc_svc_ctx *svc_ctx = NULL;
struct lnet_nid *client_nid = NULL;
int rc;
ENTRY;
if (!exp || !obd || !cluuid)
RETURN(-EINVAL);
if (req) {
svc_ctx = req->rq_svc_ctx;
client_nid = &req->rq_peer.nid;
}
if (svc_ctx || client_nid) {
rc = nodemap_add_member(svc_ctx, client_nid, exp);
if (rc != 0 && rc != -EEXIST)
RETURN(rc);
} else {
CDEBUG(D_HA,
"%s: cannot find nodemap for client %s: svc_ctx and nid are null\n",
obd->obd_name, cluuid->uuid);
}
rc = mdt_connect_internal(env, exp, mdt_dev(obd->obd_lu_dev), data,
true);
if (rc == 0) {
if (client_nid)
mdt_export_stats_init(obd, exp, client_nid);
} else {
nodemap_del_member(exp);
}
RETURN(rc);
}
/* FIXME: Can we avoid using these two interfaces? */
static int mdt_init_export(struct obd_export *exp)
{
struct mdt_export_data *med = &exp->exp_mdt_data;
int rc;
ENTRY;
INIT_LIST_HEAD(&med->med_open_head);
spin_lock_init(&med->med_open_lock);
spin_lock(&exp->exp_lock);
exp->exp_connecting = 1;
spin_unlock(&exp->exp_lock);
OBD_ALLOC(exp->exp_used_slots,
BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
if (exp->exp_used_slots == NULL)
RETURN(-ENOMEM);
/* self-export doesn't need client data and ldlm initialization */
if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
&exp->exp_client_uuid)))
RETURN(0);
rc = tgt_client_alloc(exp);
if (rc)
GOTO(err, rc);
rc = ldlm_init_export(exp);
if (rc)
GOTO(err_free, rc);
RETURN(rc);
err_free:
tgt_client_free(exp);
err:
OBD_FREE(exp->exp_used_slots,
BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
exp->exp_used_slots = NULL;
CERROR("%s: Failed to initialize export: rc = %d\n",
exp->exp_obd->obd_name, rc);
return rc;
}
static int mdt_destroy_export(struct obd_export *exp)
{
ENTRY;
target_destroy_export(exp);
OBD_FREE(exp->exp_used_slots,
BITS_TO_LONGS(OBD_MAX_RIF_MAX) * sizeof(long));
/* destroy can be called from failed obd_setup, so
* checking uuid is safer than obd_self_export
*/
if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
&exp->exp_client_uuid)))
RETURN(0);
ldlm_destroy_export(exp);
tgt_client_free(exp);
LASSERT(list_empty(&exp->exp_outstanding_replies));
LASSERT(list_empty(&exp->exp_mdt_data.med_open_head));
/*
* discard grants once we're sure no more
* interaction with the client is possible
*/
tgt_grant_discard(exp);
if (exp_connect_flags(exp) & OBD_CONNECT_GRANT)
obd2obt(exp->exp_obd)->obt_lut->lut_tgd.tgd_tot_granted_clients--;
if (!(exp->exp_flags & OBD_OPT_FORCE))
tgt_grant_sanity_check(exp->exp_obd, __func__);
RETURN(0);
}
int mdt_links_read(struct mdt_thread_info *info, struct mdt_object *mdt_obj,
struct linkea_data *ldata)
{
int rc;
LASSERT(ldata->ld_buf->lb_buf != NULL);
if (!mdt_object_exists(mdt_obj))
return -ENODATA;
rc = mo_xattr_get(info->mti_env, mdt_object_child(mdt_obj),
ldata->ld_buf, XATTR_NAME_LINK);
if (rc == -ERANGE) {
/* Buf was too small, figure out what we need. */
lu_buf_free(ldata->ld_buf);
rc = mo_xattr_get(info->mti_env, mdt_object_child(mdt_obj),
ldata->ld_buf, XATTR_NAME_LINK);
if (rc < 0)
return rc;
ldata->ld_buf = lu_buf_check_and_alloc(ldata->ld_buf, rc);
if (ldata->ld_buf->lb_buf == NULL)
return -ENOMEM;
rc = mo_xattr_get(info->mti_env, mdt_object_child(mdt_obj),
ldata->ld_buf, XATTR_NAME_LINK);
}
if (rc < 0)
return rc;
return linkea_init_with_rec(ldata);
}
/**
* Given an MDT object, try to look up the full path to the object.
* Part of the MDT layer implementation of lfs fid2path.
*
* \param[in] info Per-thread common data shared by MDT level handlers.
* \param[in] obj Object to do path lookup of
* \param[in,out] fp User-provided struct to store path information
* \param[in] root_fid Root FID of current path should reach
*
* \retval 0 Lookup successful, path information stored in fp
* \retval -EAGAIN Lookup failed, usually because object is being moved
* \retval negative errno if there was a problem
*/
static int mdt_path_current(struct mdt_thread_info *info,
struct mdt_object *obj,
struct getinfo_fid2path *fp,
struct lu_fid *root_fid)
{
struct mdt_device *mdt = info->mti_mdt;
struct lu_name *tmpname = &info->mti_name;
struct lu_fid *tmpfid = &info->mti_tmp_fid1;
struct lu_buf *buf = &info->mti_big_buf;
struct linkea_data ldata = { NULL };
bool first = true;
struct mdt_object *mdt_obj;
struct link_ea_header *leh;
struct link_ea_entry *lee;
bool worthchecking = true;
bool needsfid = false;
bool supported = false;
int isenc = -1;
char *ptr;
int reclen;
int rc = 0;
ENTRY;
/* temp buffer for path element, the buffer will be finally freed
* in mdt_thread_info_fini
*/
buf = lu_buf_check_and_alloc(buf, PATH_MAX);
if (buf->lb_buf == NULL)
RETURN(-ENOMEM);
ldata.ld_buf = buf;
ptr = fp->gf_u.gf_path + fp->gf_pathlen - 1;
*ptr = 0;
--ptr;
*tmpfid = fp->gf_fid = *mdt_object_fid(obj);
while (!lu_fid_eq(root_fid, &fp->gf_fid)) {
if (!lu_fid_eq(root_fid, &mdt->mdt_md_root_fid) &&
lu_fid_eq(&mdt->mdt_md_root_fid, &fp->gf_fid))
GOTO(out, rc = -ENOENT);
if (lu_fid_eq(mdt_object_fid(obj), tmpfid)) {
mdt_obj = obj;
mdt_object_get(info->mti_env, mdt_obj);
} else {
mdt_obj = mdt_object_find(info->mti_env, mdt, tmpfid);
if (IS_ERR(mdt_obj))
GOTO(out, rc = PTR_ERR(mdt_obj));
}
if (!mdt_object_exists(mdt_obj)) {
mdt_object_put(info->mti_env, mdt_obj);
GOTO(out, rc = -ENOENT);
}
if (mdt_object_remote(mdt_obj)) {
mdt_object_put(info->mti_env, mdt_obj);
GOTO(remote_out, rc = -EREMOTE);
}
if (worthchecking) {
/* need to know if FID being looked up is encrypted */
struct lu_attr la = { 0 };
struct dt_object *dt = mdt_obj2dt(mdt_obj);
if (dt && dt->do_ops && dt->do_ops->do_attr_get)
dt_attr_get(info->mti_env, dt, &la);
if (la.la_valid & LA_FLAGS &&
la.la_flags & LUSTRE_ENCRYPT_FL) {
if (!supported && mdt_info_req(info) &&
!exp_connect_encrypt_fid2path(
mdt_info_req(info)->rq_export)) {
/* client does not support fid2path
* for encrypted files
*/
mdt_object_put(info->mti_env, mdt_obj);
GOTO(out, rc = -ENODATA);
} else {
supported = true;
}
needsfid = true;
if (isenc == -1)
isenc = 1;
} else {
worthchecking = false;
needsfid = false;
if (isenc == -1)
isenc = 0;
}
}
rc = mdt_links_read(info, mdt_obj, &ldata);
if (rc != 0) {
mdt_object_put(info->mti_env, mdt_obj);
GOTO(out, rc);
}
leh = buf->lb_buf;
lee = (struct link_ea_entry *)(leh + 1); /* link #0 */
linkea_entry_unpack(lee, &reclen, tmpname, tmpfid);
/* If set, use link #linkno for path lookup, otherwise use
* link #0. Only do this for the final path ement.
*/
if (first && fp->gf_linkno < leh->leh_reccount) {
int count;
for (count = 0; count < fp->gf_linkno; count++) {
lee = (struct link_ea_entry *)
((char *)lee + reclen);
linkea_entry_unpack(lee, &reclen, tmpname,
tmpfid);
}
if (fp->gf_linkno < leh->leh_reccount - 1)
/* indicate to user there are more links */
fp->gf_linkno++;
}
/* Check if it is slave stripes */
rc = mdt_is_dir_stripe(info, mdt_obj);
mdt_object_put(info->mti_env, mdt_obj);
if (rc < 0)
GOTO(out, rc);
if (rc == 1) {
fp->gf_fid = *tmpfid;
continue;
}
/* Pack the name in the end of the buffer */
ptr -= tmpname->ln_namelen;
if (ptr - 1 <= fp->gf_u.gf_path)
GOTO(out, rc = -ENAMETOOLONG);
strncpy(ptr, tmpname->ln_name, tmpname->ln_namelen);
if (needsfid) {
/* Pack FID before file name, so that client can build
* encoded/digested form.
*/
char fidstr[FID_LEN + 1];
snprintf(fidstr, sizeof(fidstr), DFID,
PFID(&fp->gf_fid));
ptr -= strlen(fidstr);
if (ptr - 1 <= fp->gf_u.gf_path)
GOTO(out, rc = -ENAMETOOLONG);
strncpy(ptr, fidstr, strlen(fidstr));
}
*(--ptr) = '/';
/* keep the last resolved fid to the client, so the client will
* build the left path on another MDT for remote object
*/
fp->gf_fid = *tmpfid;
first = false;
}
/* non-zero will be treated as an error */
rc = 0;
remote_out:
if (isenc != 1)
ptr++; /* skip leading / unless this is an encrypted file */
memmove(fp->gf_u.gf_path, ptr,
fp->gf_u.gf_path + fp->gf_pathlen - ptr);
out:
RETURN(rc);
}
/**
* Given an MDT object, use mdt_path_current to get the path.
* Essentially a wrapper to retry mdt_path_current a set number of times
* if -EAGAIN is returned (usually because an object is being moved).
*
* Part of the MDT layer implementation of lfs fid2path.
*
* \param[in] info Per-thread common data shared by mdt level handlers.
* \param[in] obj Object to do path lookup of
* \param[in,out] fp User-provided struct for arguments and to store path
* information
*
* \retval 0 Lookup successful, path information stored in fp
* \retval negative errno if there was a problem
*/
static int mdt_path(struct mdt_thread_info *info, struct mdt_object *obj,
struct getinfo_fid2path *fp, struct lu_fid *root_fid)
{
struct mdt_device *mdt = info->mti_mdt;
int tries = 3;
int rc = -EAGAIN;
ENTRY;
if (fp->gf_pathlen < 3)
RETURN(-EOVERFLOW);
if (root_fid == NULL)
root_fid = &mdt->mdt_md_root_fid;
if (lu_fid_eq(root_fid, mdt_object_fid(obj))) {
fp->gf_u.gf_path[0] = '\0';
RETURN(0);
}
/* Retry multiple times in case file is being moved */
while (tries-- && rc == -EAGAIN)
rc = mdt_path_current(info, obj, fp, root_fid);
RETURN(rc);
}
/**
* Get the full path of the provided FID, as of changelog record recno.
*
* This checks sanity and looks up object for user provided FID
* before calling the actual path lookup code.
*
* Part of the MDT layer implementation of lfs fid2path.
*
* \param[in] info Per-thread common data shared by mdt level handlers.
* \param[in,out] fp User-provided struct for arguments and to store path
* information
*
* \retval 0 Lookup successful, path information and recno stored in fp
* \retval -ENOENT, object does not exist
* \retval negative errno if there was a problem
*/
static int mdt_fid2path(struct mdt_thread_info *info,
struct lu_fid *root_fid,
struct getinfo_fid2path *fp)
{
struct mdt_device *mdt = info->mti_mdt;
struct mdt_object *obj;
int excess;
int rc;
ENTRY;
CDEBUG(D_IOCTL, "path get "DFID" from %llu #%d\n",
PFID(&fp->gf_fid), fp->gf_recno, fp->gf_linkno);
if (!fid_is_sane(&fp->gf_fid))
RETURN(-EINVAL);
if (!fid_is_namespace_visible(&fp->gf_fid)) {
CDEBUG(D_INFO, "%s: "DFID" is invalid, f_seq should be >= %#llx, or f_oid != 0, or f_ver == 0\n",
mdt_obd_name(mdt),
PFID(&fp->gf_fid), (__u64)FID_SEQ_NORMAL);
RETURN(-EINVAL);
}
/* return error if client-provided root fid is not the one stored in
* the export
*/
if (root_fid && !fid_is_zero(&info->mti_exp->exp_root_fid) &&
!lu_fid_eq(root_fid, &info->mti_exp->exp_root_fid)) {
CDEBUG(D_INFO,
"%s: root fid from client "DFID" but "DFID" stored in export\n",
mdt_obd_name(mdt), PFID(root_fid),
PFID(&info->mti_exp->exp_root_fid));
RETURN(-EXDEV);
}
obj = mdt_object_find(info->mti_env, mdt, &fp->gf_fid);
if (IS_ERR(obj)) {
rc = PTR_ERR(obj);
CDEBUG(D_IOCTL, "cannot find "DFID": rc = %d\n",
PFID(&fp->gf_fid), rc);
RETURN(rc);
}
if (mdt_object_remote(obj))
rc = -EREMOTE;
else if (!mdt_object_exists(obj))
rc = -ENOENT;
else
rc = 0;
if (rc < 0) {
mdt_object_put(info->mti_env, obj);
CDEBUG(D_IOCTL, "nonlocal object "DFID": rc = %d\n",
PFID(&fp->gf_fid), rc);
RETURN(rc);
}
rc = mdt_path(info, obj, fp, root_fid);
excess = fp->gf_pathlen > 3072 ? fp->gf_pathlen - 3072 : 0;
CDEBUG(D_INFO, "fid "DFID", path %.*s recno %#llx linkno %u\n",
PFID(&fp->gf_fid), fp->gf_pathlen - excess,
fp->gf_u.gf_path + excess, fp->gf_recno, fp->gf_linkno);
mdt_object_put(info->mti_env, obj);
RETURN(rc);
}
static int mdt_rpc_fid2path(struct mdt_thread_info *info, void *key, int keylen,
void *val, int vallen)
{
struct getinfo_fid2path *fpout, *fpin;
struct lu_fid *root_fid = NULL;
int rc = 0;
fpin = key + round_up(sizeof(KEY_FID2PATH), 8);
fpout = val;
if (req_capsule_req_need_swab(info->mti_pill))
lustre_swab_fid2path(fpin);
memcpy(fpout, fpin, sizeof(*fpin));
if (fpout->gf_pathlen != vallen - sizeof(*fpin))
RETURN(-EINVAL);
if (keylen >= round_up(sizeof(KEY_FID2PATH), 8) + sizeof(*fpin) +
sizeof(struct lu_fid)) {
/* client sent its root FID, which is normally fileset FID */
root_fid = fpin->gf_u.gf_root_fid;
if (req_capsule_req_need_swab(info->mti_pill))
lustre_swab_lu_fid(root_fid);
if (root_fid != NULL && !fid_is_sane(root_fid))
RETURN(-EINVAL);
}
rc = mdt_fid2path(info, root_fid, fpout);
RETURN(rc);
}
int mdt_get_info(struct tgt_session_info *tsi)
{
char *key;
int keylen;
int rc;
ENTRY;
key = req_capsule_client_get(tsi->tsi_pill, &RMF_GETINFO_KEY);
if (!key) {
DEBUG_REQ(D_IOCTL, tgt_ses_req(tsi), "no GETINFO key");
RETURN(err_serious(-EPROTO));
}
keylen = req_capsule_get_size(tsi->tsi_pill, &RMF_GETINFO_KEY,
RCL_CLIENT);
if (KEY_IS(KEY_FID2PATH)) {
struct mdt_thread_info *info;
__u32 *vallen;
void *valout;
req_capsule_extend(tsi->tsi_pill, &RQF_MDS_FID2PATH);
vallen = req_capsule_client_get(tsi->tsi_pill,
&RMF_GETINFO_VALLEN);
if (!vallen) {
CDEBUG(D_IOCTL,
"%s: cannot get RMF_GETINFO_VALLEN buffer\n",
tgt_name(tsi->tsi_tgt));
RETURN(err_serious(-EPROTO));
}
req_capsule_set_size(tsi->tsi_pill, &RMF_GETINFO_VAL,
RCL_SERVER, *vallen);
rc = req_capsule_server_pack(tsi->tsi_pill);
if (rc)
RETURN(err_serious(rc));
valout = req_capsule_server_get(tsi->tsi_pill,
&RMF_GETINFO_VAL);
if (!valout) {
CDEBUG(D_IOCTL,
"%s: cannot get get-info RPC out buffer\n",
tgt_name(tsi->tsi_tgt));
RETURN(-ENOMEM);
}
info = tsi2mdt_info(tsi);
rc = mdt_rpc_fid2path(info, key, keylen, valout, *vallen);
mdt_thread_info_fini(info);
} else if (KEY_IS(KEY_FIEMAP)) {
rc = mdt_fiemap_get(tsi);
} else if (KEY_IS(KEY_CHANGELOG_USER)) {
req_capsule_extend(tsi->tsi_pill, &RQF_MDS_GET_INFO);
rc = mdt_changelog_get_user_info(tsi);
} else {
rc = err_serious(-EOPNOTSUPP);
}
RETURN(rc);
}
static int mdt_ioc_version_get(struct mdt_thread_info *mti, void *karg)
{
struct obd_ioctl_data *data = karg;
struct lu_fid *fid;
__u64 version;
struct mdt_object *obj;
struct mdt_lock_handle *lh;
int rc;
ENTRY;
if (data->ioc_inlbuf1 == NULL || data->ioc_inllen1 != sizeof(*fid) ||
data->ioc_inlbuf2 == NULL || data->ioc_inllen2 != sizeof(version))
RETURN(-EINVAL);
fid = (struct lu_fid *)data->ioc_inlbuf1;
if (!fid_is_sane(fid))
RETURN(-EINVAL);
CDEBUG(D_IOCTL, "getting version for "DFID"\n", PFID(fid));
lh = &mti->mti_lh[MDT_LH_PARENT];
obj = mdt_object_find_lock(mti, fid, lh, MDS_INODELOCK_UPDATE, LCK_CR);
if (IS_ERR(obj))
RETURN(PTR_ERR(obj));
if (mdt_object_remote(obj)) {
rc = -EREMOTE;
/**
* before calling version get the correct MDS should be
* fid, this is error to find remote object here
*/
CERROR("nonlocal object "DFID"\n", PFID(fid));
} else if (!mdt_object_exists(obj)) {
*(__u64 *)data->ioc_inlbuf2 = ENOENT_VERSION;
rc = -ENOENT;
} else {
version = dt_version_get(mti->mti_env, mdt_obj2dt(obj));
*(__u64 *)data->ioc_inlbuf2 = version;
rc = 0;
}
mdt_object_unlock_put(mti, obj, lh, 1);
RETURN(rc);
}
/* ioctls on obd dev */
static int mdt_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
void *karg, void __user *uarg)
{
struct obd_device *obd = exp->exp_obd;
struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
struct dt_device *dt = mdt->mdt_bottom;
struct obd_ioctl_data *data;
struct lu_env env;
int rc;
ENTRY;
CDEBUG(D_IOCTL, "%s: cmd=%x len=%u karg=%pK uarg=%pK\n",
obd->obd_name, cmd, len, karg, uarg);
rc = lu_env_init(&env, LCT_MD_THREAD);
if (rc)
RETURN(rc);
/* handle commands that don't use @karg first */
switch (cmd) {
case OBD_IOC_SYNC:
rc = mdt_device_sync(&env, mdt);
GOTO(out, rc);
case OBD_IOC_SET_READONLY:
rc = mdt_device_sync(&env, mdt);
if (rc == 0)
rc = dt_ro(&env, dt);
GOTO(out, rc);
}
if (unlikely(karg == NULL)) {
OBD_IOC_ERROR(obd->obd_name, cmd, "karg=NULL", rc = -EINVAL);
GOTO(out, rc);
}
data = karg;
switch (cmd) {
case OBD_IOC_ABORT_RECOVERY: {
if (data->ioc_type & OBD_FLG_ABORT_RECOV_MDT) {
LCONSOLE_WARN("%s: Aborting MDT recovery\n",
obd->obd_name);
set_bit(OBDF_ABORT_MDT_RECOVERY, obd->obd_flags);
wake_up(&obd->obd_next_transno_waitq);
} else { /* if (data->ioc_type & OBD_FLG_ABORT_RECOV_OST) */
/* lctl didn't set OBD_FLG_ABORT_RECOV_OST < 2.13.57 */
LCONSOLE_WARN("%s: Aborting client recovery\n",
obd->obd_name);
set_bit(OBDF_ABORT_RECOVERY, obd->obd_flags);
target_stop_recovery_thread(obd);
}
rc = 0;
break;
}
case OBD_IOC_CHANGELOG_REG:
case OBD_IOC_CHANGELOG_DEREG:
case OBD_IOC_CHANGELOG_CLEAR:
case OBD_IOC_LLOG_PRINT:
case OBD_IOC_LLOG_CANCEL:
rc = mdt->mdt_child->md_ops->mdo_iocontrol(&env, mdt->mdt_child,
cmd, len, karg);
break;
case OBD_IOC_START_LFSCK: {
struct md_device *next = mdt->mdt_child;
struct lfsck_start_param lsp;
lsp.lsp_start = (struct lfsck_start *)(data->ioc_inlbuf1);
lsp.lsp_index_valid = 0;
rc = next->md_ops->mdo_iocontrol(&env, next, cmd, 0, &lsp);
break;
}
case OBD_IOC_STOP_LFSCK: {
struct md_device *next = mdt->mdt_child;
struct lfsck_stop stop;
stop.ls_status = LS_STOPPED;
/* Old lfsck utils may pass NULL @stop. */
if (data->ioc_inlbuf1 == NULL)
stop.ls_flags = 0;
else
stop.ls_flags =
((struct lfsck_stop *)(data->ioc_inlbuf1))->ls_flags;
rc = next->md_ops->mdo_iocontrol(&env, next, cmd, 0, &stop);
break;
}
case OBD_IOC_QUERY_LFSCK: {
struct md_device *next = mdt->mdt_child;
rc = next->md_ops->mdo_iocontrol(&env, next, cmd, 0,
data->ioc_inlbuf1);
break;
}
case OBD_IOC_GET_OBJ_VERSION: {
struct mdt_thread_info *mti;
mti = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
memset(mti, 0, sizeof(*mti));
mti->mti_env = &env;
mti->mti_mdt = mdt;
mti->mti_exp = exp;
rc = mdt_ioc_version_get(mti, karg);
break;
}
case OBD_IOC_CATLOGLIST: {
struct mdt_thread_info *mti;
mti = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
lu_local_obj_fid(&mti->mti_tmp_fid1, LLOG_CATALOGS_OID);
rc = llog_catalog_list(&env, mdt->mdt_bottom, 0, karg,
&mti->mti_tmp_fid1);
break;
}
default:
rc = OBD_IOC_ERROR(obd->obd_name, cmd, "unrecognized", -ENOTTY);
break;
}
out:
lu_env_fini(&env);
RETURN(rc);
}
static int mdt_postrecov(const struct lu_env *env, struct mdt_device *mdt)
{
struct lu_device *ld = md2lu_dev(mdt->mdt_child);
int rc;
ENTRY;
if (!mdt->mdt_skip_lfsck && !mdt->mdt_bottom->dd_rdonly) {
struct lfsck_start_param lsp;
struct lfsck_start start;
lsp.lsp_start = NULL;
lsp.lsp_index_valid = 0;
if (dt2lu_dev(mdt->mdt_bottom)->ld_obd &&
dt2lu_dev(mdt->mdt_bottom)->ld_obd->obd_need_scrub) {
memset(&start, 0, sizeof(start));
start.ls_version = LFSCK_VERSION_V1;
start.ls_active = LFSCK_TYPE_SCRUB;
start.ls_flags = LPF_RESET;
lsp.lsp_start = &start;
}
rc = mdt->mdt_child->md_ops->mdo_iocontrol(env, mdt->mdt_child,
OBD_IOC_START_LFSCK,
0, &lsp);
if (rc != 0 && rc != -EALREADY)
CWARN("%s: auto trigger paused LFSCK failed: rc = %d\n",
mdt_obd_name(mdt), rc);
}
rc = ld->ld_ops->ldo_recovery_complete(env, ld);
RETURN(rc);
}
static int mdt_obd_postrecov(struct obd_device *obd)
{
struct lu_env env;
int rc;
rc = lu_env_init(&env, LCT_MD_THREAD);
if (rc)
RETURN(rc);
rc = mdt_postrecov(&env, mdt_dev(obd->obd_lu_dev));
lu_env_fini(&env);
return rc;
}
static const struct obd_ops mdt_obd_device_ops = {
.o_owner = THIS_MODULE,
.o_set_info_async = mdt_obd_set_info_async,
.o_connect = mdt_obd_connect,
.o_reconnect = mdt_obd_reconnect,
.o_disconnect = mdt_obd_disconnect,
.o_init_export = mdt_init_export,
.o_destroy_export = mdt_destroy_export,
.o_iocontrol = mdt_iocontrol,
.o_postrecov = mdt_obd_postrecov,
/* Data-on-MDT IO methods */
.o_preprw = mdt_obd_preprw,
.o_commitrw = mdt_obd_commitrw,
};
static struct lu_device *mdt_device_fini(const struct lu_env *env,
struct lu_device *d)
{
struct mdt_device *m = mdt_dev(d);
ENTRY;
mdt_fini(env, m);
RETURN(NULL);
}
static struct lu_device *mdt_device_free(const struct lu_env *env,
struct lu_device *d)
{
struct mdt_device *m = mdt_dev(d);
ENTRY;
lu_device_fini(&m->mdt_lu_dev);
OBD_FREE_PTR(m);
RETURN(NULL);
}
static struct lu_device *mdt_device_alloc(const struct lu_env *env,
struct lu_device_type *t,
struct lustre_cfg *cfg)
{
struct lu_device *l;
struct mdt_device *m;
OBD_ALLOC_PTR(m);
if (m != NULL) {
int rc;
l = &m->mdt_lu_dev;
rc = mdt_init0(env, m, t, cfg);
if (rc != 0) {
mdt_device_free(env, l);
l = ERR_PTR(rc);
return l;
}
} else
l = ERR_PTR(-ENOMEM);
return l;
}
/* context key constructor/destructor: mdt_key_init, mdt_key_fini */
LU_KEY_INIT(mdt, struct mdt_thread_info);
static void mdt_key_fini(const struct lu_context *ctx,
struct lu_context_key *key, void *data)
{
struct mdt_thread_info *info = data;
if (info->mti_big_lov) {
OBD_FREE_LARGE(info->mti_big_lov, info->mti_big_lovsize);
info->mti_big_lov = NULL;
info->mti_big_lovsize = 0;
}
if (info->mti_big_lmv) {
OBD_FREE_LARGE(info->mti_big_lmv, info->mti_big_lmvsize);
info->mti_big_lmv = NULL;
info->mti_big_lmvsize = 0;
}
if (info->mti_big_acl) {
OBD_FREE_LARGE(info->mti_big_acl, info->mti_big_aclsize);
info->mti_big_acl = NULL;
info->mti_big_aclsize = 0;
}
OBD_FREE_PTR(info);
}
/* context key: mdt_thread_key */
LU_CONTEXT_KEY_DEFINE(mdt, LCT_MD_THREAD);
struct lu_ucred *mdt_ucred(const struct mdt_thread_info *info)
{
return lu_ucred(info->mti_env);
}
struct lu_ucred *mdt_ucred_check(const struct mdt_thread_info *info)
{
return lu_ucred_check(info->mti_env);
}
/**
* Enable/disable COS (Commit On Sharing).
*
* Set/Clear the COS flag in mdt options.
*
* \param mdt mdt device
* \param val 0 disables COS, other values enable COS
*/
void mdt_enable_cos(struct mdt_device *mdt, bool val)
{
struct lu_env env;
int rc;
mdt->mdt_opts.mo_cos = val;
rc = lu_env_init(&env, LCT_LOCAL);
if (unlikely(rc != 0)) {
CWARN("%s: lu_env initialization failed, cannot sync: rc = %d\n",
mdt_obd_name(mdt), rc);
return;
}
mdt_device_sync(&env, mdt);
lu_env_fini(&env);
}
/**
* Check COS (Commit On Sharing) status.
*
* Return COS flag status.
*
* \param mdt mdt device
*/
int mdt_cos_is_enabled(struct mdt_device *mdt)
{
return mdt->mdt_opts.mo_cos != 0;
}
static const struct lu_device_type_operations mdt_device_type_ops = {
.ldto_device_alloc = mdt_device_alloc,
.ldto_device_free = mdt_device_free,
.ldto_device_fini = mdt_device_fini
};
static struct lu_device_type mdt_device_type = {
.ldt_tags = LU_DEVICE_MD,
.ldt_name = LUSTRE_MDT_NAME,
.ldt_ops = &mdt_device_type_ops,
.ldt_ctx_tags = LCT_MD_THREAD
};
static int __init mdt_init(void)
{
int rc;
BUILD_BUG_ON(sizeof("0x0123456789ABCDEF:0x01234567:0x01234567") !=
FID_NOBRACE_LEN + 1);
BUILD_BUG_ON(sizeof("[0x0123456789ABCDEF:0x01234567:0x01234567]") !=
FID_LEN + 1);
rc = libcfs_setup();
if (rc)
return rc;
rc = lu_kmem_init(mdt_caches);
if (rc)
return rc;
rc = mds_mod_init();
if (rc)
GOTO(lu_fini, rc);
rc = class_register_type(&mdt_obd_device_ops, NULL, true,
LUSTRE_MDT_NAME, &mdt_device_type);
if (rc)
GOTO(mds_fini, rc);
lu_fini:
if (rc)
lu_kmem_fini(mdt_caches);
mds_fini:
if (rc)
mds_mod_exit();
return rc;
}
static void __exit mdt_exit(void)
{
class_unregister_type(LUSTRE_MDT_NAME);
mds_mod_exit();
lu_kmem_fini(mdt_caches);
}
MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
MODULE_DESCRIPTION("Lustre Metadata Target ("LUSTRE_MDT_NAME")");
MODULE_VERSION(LUSTRE_VERSION_STRING);
MODULE_LICENSE("GPL");
late_initcall_sync(mdt_init);
module_exit(mdt_exit);
