Viewing: mdc_request.c
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*/
#define DEBUG_SUBSYSTEM S_MDC
#include <linux/init.h>
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/pagemap.h>
#include <linux/user_namespace.h>
#include <linux/utsname.h>
#include <linux/delay.h>
#include <linux/uidgid.h>
#include <linux/device.h>
#include <lustre_compat/linux/xarray.h>
#include <lustre_errno.h>
#include <cl_object.h>
#include <llog_swab.h>
#include <lprocfs_status.h>
#include <lustre_acl.h>
#include <lustre_compat.h>
#include <lustre_fid.h>
#include <uapi/linux/lustre/lustre_ioctl.h>
#include <lustre_ioctl_old.h>
#include <lustre_kernelcomm.h>
#include <lustre_lmv.h>
#include <lustre_log.h>
#include <lustre_osc.h>
#include <lustre_swab.h>
#include <lustre_quota.h>
#include <obd_class.h>
#include "mdc_internal.h"
#define REQUEST_MINOR 244
static inline int mdc_queue_wait(struct ptlrpc_request *req)
{
struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
int rc;
/* obd_get_request_slot() ensures that this client has no more
* than cl_max_rpcs_in_flight RPCs simultaneously inf light
* against an MDT.
*/
rc = obd_get_request_slot(cli);
if (rc != 0)
return rc;
rc = ptlrpc_queue_wait(req);
obd_put_request_slot(cli);
return rc;
}
/*
* Send MDS_GET_ROOT RPC to fetch root FID.
*
* If \a fileset is not NULL it should contain a subdirectory off
* the ROOT/ directory to be mounted on the client. Return the FID
* of the subdirectory to the client to mount onto its mountpoint.
*
* \param[in] imp MDC import
* \param[in] fileset fileset name, which could be NULL
* \param[out] rootfid root FID of this mountpoint
* \param[out] pc root capa will be unpacked and saved in this pointer
*
* \retval 0 on success, negative errno on failure
*/
static int mdc_get_root(struct obd_export *exp, const char *fileset,
struct lu_fid *rootfid)
{
struct ptlrpc_request *req;
struct mdt_body *body;
int rc;
ENTRY;
req = ptlrpc_request_alloc(class_exp2cliimp(exp),
&RQF_MDS_GET_ROOT);
if (req == NULL)
RETURN(-ENOMEM);
if (fileset != NULL)
req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
strlen(fileset) + 1);
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GET_ROOT);
if (rc) {
ptlrpc_request_free(req);
RETURN(rc);
}
mdc_pack_body(&req->rq_pill, NULL, 0, 0, -1, 0, MDT_INVALID_PROJID);
if (fileset != NULL) {
char *name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
memcpy(name, fileset, strlen(fileset));
}
lustre_msg_add_flags(req->rq_reqmsg, LUSTRE_IMP_FULL);
req->rq_send_state = LUSTRE_IMP_FULL;
ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
if (rc)
GOTO(out, rc);
body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
if (body == NULL)
GOTO(out, rc = -EPROTO);
/* The connect flags of the target may not be set yet.
* ptlrpc_queue_wait() sets them implicitly, so this check is done after
* the RPC was sent to guarantee they are set. If the mdt version does
* not support a subdirectory mount, return -EOPNOTSUPP and don't set
* the rootfid.
*/
if (fileset && !(exp_connect_flags(exp) & OBD_CONNECT_SUBTREE))
GOTO(out, rc = -EOPNOTSUPP);
*rootfid = body->mbo_fid1;
CDEBUG(D_NET, "root fid="DFID", last_committed=%llu\n",
PFID(rootfid), lustre_msg_get_last_committed(req->rq_repmsg));
EXIT;
out:
ptlrpc_req_put(req);
return rc;
}
/*
* This function now is known to always saying that it will receive 4 buffers
* from server. Even for cases when acl_size and md_size is zero, RPC header
* will contain 4 fields and RPC itself will contain zero size fields. This is
* because mdt_getattr*() _always_ returns 4 fields, but if acl is not needed
* and thus zero, it shrinks it, making zero size. The same story about
* md_size. And this is course of problem when client waits for smaller number
* of fields. This issue will be fixed later when client gets aware of RPC
* layouts. --umka
*/
static int mdc_getattr_common(struct obd_export *exp,
struct ptlrpc_request *req,
struct md_op_data *op_data)
{
struct req_capsule *pill = &req->rq_pill;
struct mdt_body *body;
void *eadata;
int rc;
ENTRY;
/* Request message already built. */
rc = ptlrpc_queue_wait(req);
if (rc != 0)
RETURN(rc);
/* sanity check for the reply */
body = req_capsule_server_get(pill, &RMF_MDT_BODY);
if (body == NULL)
RETURN(-EPROTO);
CDEBUG(D_NET, "mode: %o\n", body->mbo_mode);
mdc_update_max_ea_from_body(exp, body);
if (body->mbo_eadatasize != 0) {
eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
body->mbo_eadatasize);
if (eadata == NULL)
RETURN(-EPROTO);
}
/* If encryption context was returned by MDT, put it in op_data
* so that caller can set it on inode and save an extra getxattr.
*/
if (op_data && op_data->op_valid & OBD_MD_ENCCTX &&
body->mbo_valid & OBD_MD_ENCCTX) {
op_data->op_file_encctx =
req_capsule_server_get(pill, &RMF_FILE_ENCCTX);
op_data->op_file_encctx_size =
req_capsule_get_size(pill, &RMF_FILE_ENCCTX,
RCL_SERVER);
}
RETURN(0);
}
static void mdc_reset_acl_req(struct ptlrpc_request *req)
{
spin_lock(&req->rq_early_free_lock);
sptlrpc_cli_free_repbuf(req);
req->rq_repbuf = NULL;
req->rq_repbuf_len = 0;
req->rq_repdata = NULL;
req->rq_reqdata_len = 0;
spin_unlock(&req->rq_early_free_lock);
}
static int mdc_getattr(struct obd_export *exp, struct md_op_data *op_data,
struct ptlrpc_request **request)
{
struct ptlrpc_request *req;
struct obd_device *obd = class_exp2obd(exp);
struct obd_import *imp = class_exp2cliimp(exp);
__u32 acl_bufsize = LUSTRE_POSIX_ACL_MAX_SIZE_OLD;
int rc;
ENTRY;
/* Single MDS without an LMV case */
if (op_data->op_flags & MF_GET_MDT_IDX) {
op_data->op_mds = 0;
RETURN(0);
}
*request = NULL;
req = ptlrpc_request_alloc(imp, &RQF_MDS_GETATTR);
if (req == NULL)
RETURN(-ENOMEM);
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
if (rc) {
ptlrpc_request_free(req);
RETURN(rc);
}
/* LU-15245: avoid deadlock with modifying RPCs on MDS_REQUEST_PORTAL */
req->rq_request_portal = MDS_READPAGE_PORTAL;
again:
mdc_pack_body(&req->rq_pill, &op_data->op_fid1, op_data->op_valid,
op_data->op_mode, -1, 0, op_data->op_projid);
req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER, acl_bufsize);
req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
op_data->op_mode);
if (exp_connect_encrypt(exp) && op_data->op_valid & OBD_MD_ENCCTX)
req_capsule_set_size(&req->rq_pill, &RMF_FILE_ENCCTX,
RCL_SERVER,
obd->u.cli.cl_max_mds_easize);
else
req_capsule_set_size(&req->rq_pill, &RMF_FILE_ENCCTX,
RCL_SERVER, 0);
ptlrpc_request_set_replen(req);
rc = mdc_getattr_common(exp, req, op_data);
if (rc) {
if (rc == -ERANGE) {
acl_bufsize = min_t(__u32,
imp->imp_connect_data.ocd_max_easize,
XATTR_SIZE_MAX);
mdc_reset_acl_req(req);
goto again;
}
ptlrpc_req_put(req);
} else {
*request = req;
}
RETURN(rc);
}
static int mdc_getattr_name(struct obd_export *exp, struct md_op_data *op_data,
struct ptlrpc_request **request)
{
struct ptlrpc_request *req;
struct obd_import *imp = class_exp2cliimp(exp);
__u32 acl_bufsize = LUSTRE_POSIX_ACL_MAX_SIZE_OLD;
int rc;
ENTRY;
*request = NULL;
req = ptlrpc_request_alloc(imp, &RQF_MDS_GETATTR_NAME);
if (req == NULL)
RETURN(-ENOMEM);
req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
op_data->op_namelen + 1);
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR_NAME);
if (rc) {
ptlrpc_request_free(req);
RETURN(rc);
}
if (op_data->op_name) {
char *name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
LASSERT(strnlen(op_data->op_name, op_data->op_namelen) ==
op_data->op_namelen);
memcpy(name, op_data->op_name, op_data->op_namelen);
}
again:
mdc_pack_body(&req->rq_pill, &op_data->op_fid1, op_data->op_valid,
op_data->op_mode, op_data->op_suppgids[0], 0,
op_data->op_projid);
req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
op_data->op_mode);
req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER, acl_bufsize);
req_capsule_set_size(&req->rq_pill, &RMF_FILE_ENCCTX, RCL_SERVER, 0);
ptlrpc_request_set_replen(req);
if (op_data->op_bias & MDS_FID_OP) {
struct mdt_body *b = req_capsule_client_get(&req->rq_pill,
&RMF_MDT_BODY);
if (b) {
if (op_data->op_bias & MDS_NAMEHASH)
b->mbo_valid |= OBD_MD_NAMEHASH;
b->mbo_fid2 = op_data->op_fid2;
}
}
rc = mdc_getattr_common(exp, req, NULL);
if (rc) {
if (rc == -ERANGE) {
acl_bufsize = min_t(__u32,
imp->imp_connect_data.ocd_max_easize,
XATTR_SIZE_MAX);
mdc_reset_acl_req(req);
goto again;
}
ptlrpc_req_put(req);
} else {
*request = req;
}
RETURN(rc);
}
static
int mdc_xattr_common(struct obd_export *exp, const struct req_format *fmt,
const struct lu_fid *fid, int opcode, u64 valid,
const char *xattr_name, const char *input,
int input_size, int output_size, int flags,
__u32 suppgid, __u32 projid,
struct ptlrpc_request **request)
{
struct ptlrpc_request *req;
struct sptlrpc_sepol *sepol;
int xattr_namelen = 0;
char *tmp;
int rc;
ENTRY;
*request = NULL;
req = ptlrpc_request_alloc(class_exp2cliimp(exp), fmt);
if (req == NULL)
RETURN(-ENOMEM);
if (xattr_name) {
xattr_namelen = strlen(xattr_name) + 1;
req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
xattr_namelen);
}
if (input_size)
LASSERT(input);
req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
input_size);
/* get SELinux policy info if any */
sepol = sptlrpc_sepol_get(req);
if (IS_ERR(sepol))
GOTO(err_free_rq, rc = PTR_ERR(sepol));
req_capsule_set_size(&req->rq_pill, &RMF_SELINUX_POL, RCL_CLIENT,
sptlrpc_sepol_size(sepol));
/* Flush local XATTR locks to get rid of a possible cancel RPC */
if (opcode == MDS_REINT && fid_is_sane(fid) &&
exp->exp_connect_data.ocd_ibits_known & MDS_INODELOCK_XATTR) {
LIST_HEAD(cancels);
int count;
/* Without that packing would fail */
if (input_size == 0)
req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
RCL_CLIENT, 0);
count = mdc_resource_cancel_unused(exp, fid,
&cancels, LCK_EX,
MDS_INODELOCK_XATTR);
rc = mdc_prep_elc_req(exp, req, MDS_REINT, &cancels, count);
if (rc)
GOTO(err_put_sepol, rc);
} else {
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, opcode);
if (rc)
GOTO(err_put_sepol, rc);
}
if (opcode == MDS_REINT) {
struct mdt_rec_setxattr *rec;
BUILD_BUG_ON(sizeof(struct mdt_rec_setxattr) !=
sizeof(struct mdt_rec_reint));
rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
rec->sx_opcode = REINT_SETXATTR;
rec->sx_fsuid = from_kuid(&init_user_ns, current_fsuid());
rec->sx_fsgid = from_kgid(&init_user_ns, current_fsgid());
rec->sx_cap = ll_capability_u32(current_cap());
rec->sx_suppgid1 = suppgid;
rec->sx_suppgid2 = -1;
rec->sx_fid = *fid;
rec->sx_valid = valid | OBD_MD_FLCTIME;
rec->sx_time = ktime_get_real_seconds();
rec->sx_size = output_size;
rec->sx_flags = flags;
lustre_msg_set_projid(req->rq_reqmsg, projid);
} else {
mdc_pack_body(&req->rq_pill, fid, valid, output_size,
suppgid, flags, projid);
/* Avoid deadlock with modifying RPCs on MDS_REQUEST_PORTAL.
* See LU-15245.
*/
req->rq_request_portal = MDS_READPAGE_PORTAL;
}
if (xattr_name) {
tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
memcpy(tmp, xattr_name, xattr_namelen);
}
if (input_size) {
tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
memcpy(tmp, input, input_size);
}
mdc_file_sepol_pack(&req->rq_pill, sepol);
sptlrpc_sepol_put(sepol);
if (req_capsule_has_field(&req->rq_pill, &RMF_EADATA, RCL_SERVER))
req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
RCL_SERVER, output_size);
ptlrpc_request_set_replen(req);
/* make rpc */
if (opcode == MDS_REINT)
ptlrpc_get_mod_rpc_slot(req);
rc = ptlrpc_queue_wait(req);
if (opcode == MDS_REINT)
ptlrpc_put_mod_rpc_slot(req);
if (rc)
ptlrpc_req_put(req);
else
*request = req;
RETURN(rc);
err_put_sepol:
sptlrpc_sepol_put(sepol);
err_free_rq:
ptlrpc_request_free(req);
RETURN(rc);
}
static int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
u64 obd_md_valid, const char *name, const void *value,
size_t value_size, unsigned int xattr_flags,
u32 suppgid, u32 projid, struct ptlrpc_request **req)
{
LASSERT(obd_md_valid == OBD_MD_FLXATTR ||
obd_md_valid == OBD_MD_FLXATTRRM);
return mdc_xattr_common(exp, &RQF_MDS_REINT_SETXATTR,
fid, MDS_REINT, obd_md_valid, name,
value, value_size, 0, xattr_flags, suppgid,
projid, req);
}
static int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
u64 obd_md_valid, const char *name, size_t buf_size,
u32 projid, struct ptlrpc_request **req)
{
struct mdt_body *body;
int rc;
LASSERT(obd_md_valid == OBD_MD_FLXATTR ||
obd_md_valid == OBD_MD_FLXATTRLS);
/* Message below is checked in sanity-selinux test_20d
* and sanity-sec test_49
*/
CDEBUG(D_INFO, "%s: get xattr '%s' for "DFID"\n",
exp->exp_obd->obd_name, name, PFID(fid));
rc = mdc_xattr_common(exp, &RQF_MDS_GETXATTR, fid, MDS_GETXATTR,
obd_md_valid, name, NULL, 0, buf_size, 0, -1,
projid, req);
if (rc < 0)
GOTO(out, rc);
body = req_capsule_server_get(&(*req)->rq_pill, &RMF_MDT_BODY);
if (body == NULL)
GOTO(out, rc = -EPROTO);
/* only detect the xattr size */
if (buf_size == 0) {
/* LU-11109: Older MDTs do not distinguish
* between nonexistent xattrs and zero length
* values in this case. Newer MDTs will return
* -ENODATA or set OBD_MD_FLXATTR.
*/
GOTO(out, rc = body->mbo_eadatasize);
}
if (body->mbo_eadatasize == 0) {
/* LU-11109: Newer MDTs set OBD_MD_FLXATTR on
* success so that we can distinguish between
* zero length value and nonexistent xattr.
*
* If OBD_MD_FLXATTR is not set then we keep
* the old behavior and return -ENODATA for
* getxattr() when mbo_eadatasize is 0. But
* -ENODATA only makes sense for getxattr()
* and not for listxattr().
*/
if (body->mbo_valid & OBD_MD_FLXATTR)
GOTO(out, rc = 0);
else if (obd_md_valid == OBD_MD_FLXATTR)
GOTO(out, rc = -ENODATA);
else
GOTO(out, rc = 0);
}
GOTO(out, rc = body->mbo_eadatasize);
out:
if (rc < 0) {
ptlrpc_req_put(*req);
*req = NULL;
}
return rc;
}
static int mdc_get_lustre_md(struct obd_export *exp, struct req_capsule *pill,
struct obd_export *dt_exp,
struct obd_export *md_exp,
struct lustre_md *md)
{
int rc;
ENTRY;
LASSERT(md);
memset(md, 0, sizeof(*md));
md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
LASSERT(md->body != NULL);
if (md->body->mbo_valid & OBD_MD_FLEASIZE) {
if (!S_ISREG(md->body->mbo_mode)) {
CDEBUG(D_INFO,
"OBD_MD_FLEASIZE set, should be a regular file, but is not\n");
GOTO(out, rc = -EPROTO);
}
if (md->body->mbo_eadatasize == 0) {
CDEBUG(D_INFO,
"OBD_MD_FLEASIZE set, but eadatasize 0\n");
GOTO(out, rc = -EPROTO);
}
md->layout.lb_len = md->body->mbo_eadatasize;
md->layout.lb_buf = req_capsule_server_sized_get(pill,
&RMF_MDT_MD,
md->layout.lb_len);
if (md->layout.lb_buf == NULL)
GOTO(out, rc = -EPROTO);
} else if (md->body->mbo_valid & OBD_MD_FLDIREA) {
const union lmv_mds_md *lmv;
size_t lmv_size;
if (!S_ISDIR(md->body->mbo_mode)) {
CDEBUG(D_INFO,
"OBD_MD_FLDIREA set, should be a directory, but is not\n");
GOTO(out, rc = -EPROTO);
}
if (md_exp->exp_obd->obd_type->typ_lu == &mdc_device_type) {
CERROR("%s: no LMV, upgrading from old version?\n",
md_exp->exp_obd->obd_name);
GOTO(out_acl, rc = 0);
}
if (md->body->mbo_valid & OBD_MD_MEA) {
lmv_size = md->body->mbo_eadatasize;
if (lmv_size == 0) {
CDEBUG(D_INFO,
"OBD_MD_FLDIREA is set, but eadatasize 0\n");
RETURN(-EPROTO);
}
lmv = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
lmv_size);
if (lmv == NULL)
GOTO(out, rc = -EPROTO);
rc = md_stripe_object_create(md_exp, &md->lsm_obj,
lmv, lmv_size);
if (rc < 0)
GOTO(out, rc);
}
/* since 2.12.58 intent_getattr fetches default LMV */
if (md->body->mbo_valid & OBD_MD_DEFAULT_MEA) {
lmv_size = req_capsule_get_size(pill,
&RMF_DEFAULT_MDT_MD,
RCL_SERVER);
lmv = req_capsule_server_sized_get(pill,
&RMF_DEFAULT_MDT_MD,
lmv_size);
if (!lmv)
GOTO(out, rc = -EPROTO);
rc = md_stripe_object_create(md_exp, &md->def_lsm_obj,
lmv, lmv_size);
if (rc < 0)
GOTO(out, rc);
}
}
rc = 0;
out_acl:
if (md->body->mbo_valid & OBD_MD_FLACL) {
/* for ACL, it's possible that FLACL is set but aclsize is zero.
* only when aclsize != 0 there's an actual segment for ACL
* in reply buffer.
*/
rc = mdc_unpack_acl(pill, md);
if (rc)
GOTO(out, rc);
}
EXIT;
out:
if (rc) {
lmd_clear_acl(md);
md_put_lustre_md(md_exp, md);
}
return rc;
}
void mdc_replay_open(struct ptlrpc_request *req)
{
struct md_open_data *mod = req->rq_cb_data;
struct ptlrpc_request *close_req;
struct obd_client_handle *och;
struct lustre_handle old_open_handle = { };
struct mdt_body *body;
struct ldlm_reply *rep;
ENTRY;
if (mod == NULL) {
DEBUG_REQ(D_ERROR, req,
"cannot properly replay without open data");
EXIT;
return;
}
body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
LASSERT(body != NULL);
rep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
if (rep != NULL && rep->lock_policy_res2 != 0)
DEBUG_REQ(D_ERROR, req, "Open request replay failed with %ld ",
(long)rep->lock_policy_res2);
spin_lock(&req->rq_lock);
och = mod->mod_och;
if (och && och->och_open_handle.cookie)
req->rq_early_free_repbuf = 1;
else
req->rq_early_free_repbuf = 0;
spin_unlock(&req->rq_lock);
if (req->rq_early_free_repbuf) {
struct lustre_handle *file_open_handle;
LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
file_open_handle = &och->och_open_handle;
CDEBUG(D_HA, "updating handle from %#llx to %#llx\n",
file_open_handle->cookie, body->mbo_open_handle.cookie);
old_open_handle = *file_open_handle;
*file_open_handle = body->mbo_open_handle;
}
close_req = mod->mod_close_req;
if (close_req) {
__u32 opc = lustre_msg_get_opc(close_req->rq_reqmsg);
struct mdt_ioepoch *epoch;
LASSERT(opc == MDS_CLOSE);
epoch = req_capsule_client_get(&close_req->rq_pill,
&RMF_MDT_EPOCH);
LASSERT(epoch);
if (req->rq_early_free_repbuf)
LASSERT(old_open_handle.cookie ==
epoch->mio_open_handle.cookie);
DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
epoch->mio_open_handle = body->mbo_open_handle;
}
EXIT;
}
void mdc_commit_open(struct ptlrpc_request *req)
{
struct md_open_data *mod = req->rq_cb_data;
if (mod == NULL)
return;
/**
* No need to touch md_open_data::mod_och, it holds a reference on
* \var mod and will zero references to each other, \var mod will be
* freed after that when md_open_data::mod_och will put the reference.
*/
/**
* Do not let open request to disappear as it still may be needed
* for close rpc to happen (it may happen on evict only, otherwise
* ptlrpc_request::rq_replay does not let mdc_commit_open() to be
* called), just mark this rpc as committed to distinguish these 2
* cases, see mdc_close() for details. The open request reference will
* be put along with freeing \var mod.
*/
ptlrpc_request_addref(req);
spin_lock(&req->rq_lock);
req->rq_committed = 1;
spin_unlock(&req->rq_lock);
req->rq_cb_data = NULL;
kref_put(&mod->mod_refcount, obd_mod_free);
}
int mdc_set_open_replay_data(struct obd_export *exp,
struct obd_client_handle *och,
struct lookup_intent *it)
{
struct md_open_data *mod;
struct mdt_rec_create *rec;
struct mdt_body *body;
struct ptlrpc_request *open_req = it->it_request;
struct obd_import *imp = open_req->rq_import;
ENTRY;
if (!open_req->rq_replay)
RETURN(0);
rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
LASSERT(rec != NULL);
/* Incoming message in my byte order (it's been swabbed). */
/* Outgoing messages always in my byte order. */
LASSERT(body != NULL);
/* Only if the import is replayable, we set replay_open data */
if (och && test_bit(IMPF_REPLAYABLE, imp->imp_flags)) {
mod = obd_mod_alloc();
if (mod == NULL) {
DEBUG_REQ(D_ERROR, open_req,
"cannot allocate md_open_data");
RETURN(0);
}
/**
* Take a reference on @mod, to be freed on mdc_close().
* It protects @mod from being freed on eviction (commit
* callback is called despite rq_replay flag).
* Another reference for @och.
*/
kref_get(&mod->mod_refcount);
kref_get(&mod->mod_refcount);
spin_lock(&open_req->rq_lock);
och->och_mod = mod;
mod->mod_och = och;
mod->mod_is_create = it_disposition(it, DISP_OPEN_CREATE) ||
it_disposition(it, DISP_OPEN_STRIPE);
mod->mod_open_req = open_req;
open_req->rq_cb_data = mod;
open_req->rq_commit_cb = mdc_commit_open;
open_req->rq_early_free_repbuf = 1;
spin_unlock(&open_req->rq_lock);
}
rec->cr_fid2 = body->mbo_fid1;
rec->cr_open_handle_old = body->mbo_open_handle;
open_req->rq_replay_cb = mdc_replay_open;
if (!fid_is_sane(&body->mbo_fid1)) {
DEBUG_REQ(D_ERROR, open_req,
"saving replay request with insane FID " DFID,
PFID(&body->mbo_fid1));
LBUG();
}
DEBUG_REQ(D_RPCTRACE, open_req, "Set up open replay data");
RETURN(0);
}
static void mdc_free_open(struct md_open_data *mod)
{
int committed = 0;
if (mod->mod_is_create == 0 &&
imp_connect_disp_stripe(mod->mod_open_req->rq_import))
committed = 1;
/**
* No reason to asssert here if the open request has
* rq_replay == 1. It means that mdc_close failed, and
* close request wasn`t sent. It is not fatal to client.
* The worst thing is eviction if the client gets open lock
**/
DEBUG_REQ(D_RPCTRACE, mod->mod_open_req,
"free open request, rq_replay=%d",
mod->mod_open_req->rq_replay);
ptlrpc_request_committed(mod->mod_open_req, committed);
if (mod->mod_close_req)
ptlrpc_request_committed(mod->mod_close_req, committed);
}
static int mdc_clear_open_replay_data(struct obd_export *exp,
struct obd_client_handle *och)
{
struct md_open_data *mod = och->och_mod;
ENTRY;
/**
* It is possible to not have \var mod in a case of eviction between
* lookup and ll_file_open().
**/
if (mod == NULL)
RETURN(0);
LASSERT(mod != LP_POISON);
LASSERT(mod->mod_open_req != NULL);
spin_lock(&mod->mod_open_req->rq_lock);
if (mod->mod_och)
mod->mod_och->och_open_handle.cookie = 0;
mod->mod_open_req->rq_early_free_repbuf = 0;
spin_unlock(&mod->mod_open_req->rq_lock);
mdc_free_open(mod);
mod->mod_och = NULL;
och->och_mod = NULL;
kref_put(&mod->mod_refcount, obd_mod_free);
RETURN(0);
}
static int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
struct md_open_data *mod, struct ptlrpc_request **request)
{
struct obd_device *obd = class_exp2obd(exp);
struct ptlrpc_request *req;
struct req_format *req_fmt;
size_t u32_count = 0;
int rc;
int saved_rc = 0;
ENTRY;
CDEBUG(D_INODE, "%s: "DFID" file closed with intent: %x\n",
exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
op_data->op_bias);
if (op_data->op_bias & MDS_CLOSE_INTENT) {
req_fmt = &RQF_MDS_CLOSE_INTENT;
if (op_data->op_bias & MDS_HSM_RELEASE) {
/* allocate a FID for volatile file */
rc = mdc_fid_alloc(NULL, exp, &op_data->op_fid2,
op_data);
if (rc < 0) {
CERROR("%s: "DFID" allocating FID: rc = %d\n",
obd->obd_name, PFID(&op_data->op_fid1),
rc);
/* save the errcode and proceed to close */
saved_rc = rc;
}
}
if (op_data->op_bias & MDS_CLOSE_RESYNC_DONE) {
size_t count = op_data->op_data_size / sizeof(__u32);
if (count > INLINE_RESYNC_ARRAY_SIZE)
u32_count = count;
}
} else {
req_fmt = &RQF_MDS_CLOSE;
}
*request = NULL;
if (CFS_FAIL_CHECK(OBD_FAIL_MDC_CLOSE))
req = NULL;
else
req = ptlrpc_request_alloc(class_exp2cliimp(exp), req_fmt);
if (req == NULL) {
/**
* TODO: repeat close after errors
*/
CWARN("%s: close of FID "DFID" failed, file reference will be dropped when this client unmounts or is evicted\n",
obd->obd_name, PFID(&op_data->op_fid1));
GOTO(out, rc = -ENOMEM);
}
if (u32_count > 0)
req_capsule_set_size(&req->rq_pill, &RMF_U32, RCL_CLIENT,
u32_count * sizeof(__u32));
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
if (rc) {
ptlrpc_request_free(req);
req = NULL;
GOTO(out, rc);
}
/* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
* portal whose threads are not taking any DLM locks and are therefore
* always progressing
*/
req->rq_request_portal = MDS_READPAGE_PORTAL;
ptlrpc_at_set_req_timeout(req);
lustre_msg_set_projid(req->rq_reqmsg, op_data->op_projid);
if (!obd->u.cli.cl_lsom_update ||
!(exp_connect_flags2(exp) & OBD_CONNECT2_LSOM))
op_data->op_xvalid &= ~(OP_XVALID_LAZYSIZE |
OP_XVALID_LAZYBLOCKS);
mdc_close_pack(&req->rq_pill, op_data);
req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
obd->u.cli.cl_default_mds_easize);
ptlrpc_request_set_replen(req);
/* Ensure that this close's handle is fixed up during replay. */
if (likely(mod != NULL)) {
LASSERTF(mod->mod_open_req != NULL &&
mod->mod_open_req->rq_type != LI_POISON,
"POISONED open %px!\n", mod->mod_open_req);
/* Set only when the close RPC has been filled, otherwise
* mdc_replay_open() can access RPC with no rq_reqmsg */
mod->mod_close_req = req;
DEBUG_REQ(D_RPCTRACE, mod->mod_open_req, "matched open");
/* We no longer want to preserve this open for replay even
* though the open was committed. b=3632, b=3633 */
spin_lock(&mod->mod_open_req->rq_lock);
mod->mod_open_req->rq_replay = 0;
spin_unlock(&mod->mod_open_req->rq_lock);
} else {
CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
}
ptlrpc_get_mod_rpc_slot(req);
rc = ptlrpc_queue_wait(req);
ptlrpc_put_mod_rpc_slot(req);
if (req->rq_repmsg == NULL) {
CDEBUG(D_RPCTRACE, "request %p failed to send: rc = %d\n", req,
req->rq_status);
if (rc == 0)
rc = req->rq_status ?: -EIO;
} else if (rc == 0 || rc == -EAGAIN) {
struct mdt_body *body;
rc = lustre_msg_get_status(req->rq_repmsg);
if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
DEBUG_REQ(D_ERROR, req,
"type = PTL_RPC_MSG_ERR: rc = %d", rc);
if (rc > 0)
rc = -rc;
}
body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
if (body == NULL)
rc = -EPROTO;
} else if (rc == -ESTALE) {
/**
* it can be allowed error after 3633 if open was committed and
* server failed before close was sent. Let's check if mod
* exists and return no error in that case
*/
if (mod) {
DEBUG_REQ(D_HA, req, "Reset ESTALE = %d", rc);
LASSERT(mod->mod_open_req != NULL);
if (mod->mod_open_req->rq_committed)
rc = 0;
}
}
out:
if (mod) {
if (rc != 0)
mod->mod_close_req = NULL;
if (mod->mod_close_req)
ptlrpc_request_addref(mod->mod_close_req);
/* Since now, mod is accessed through open_req only,
* thus close req does not keep a reference on mod anymore.
*/
kref_put(&mod->mod_refcount, obd_mod_free);
}
*request = req;
RETURN(rc < 0 ? rc : saved_rc);
}
static int mdc_getpage(struct obd_export *exp, const struct lu_fid *fid,
u64 offset, struct folio **folios, int nfolios,
__u32 projid, struct ptlrpc_request **request)
{
struct ptlrpc_request *req;
struct ptlrpc_bulk_desc *desc;
int i;
int resends = 0;
int rc;
ENTRY;
*request = NULL;
restart_bulk:
req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
if (req == NULL)
RETURN(-ENOMEM);
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
if (rc) {
ptlrpc_request_free(req);
RETURN(rc);
}
req->rq_request_portal = MDS_READPAGE_PORTAL;
ptlrpc_at_set_req_timeout(req);
lustre_msg_set_projid(req->rq_reqmsg, projid);
desc = ptlrpc_prep_bulk_imp(req, nfolios, 1,
PTLRPC_BULK_PUT_SINK,
MDS_BULK_PORTAL,
&ptlrpc_bulk_kiov_pin_ops);
if (desc == NULL) {
ptlrpc_req_put(req);
RETURN(-ENOMEM);
}
/* NB req now owns desc and will free it when it gets freed */
for (i = 0; i < nfolios; i++)
desc->bd_frag_ops->add_kiov_frag(desc,
folio_page(folios[i], 0), 0, PAGE_SIZE);
mdc_readdir_pack(&req->rq_pill, offset, PAGE_SIZE * nfolios, fid);
ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
if (rc) {
ptlrpc_req_put(req);
if (rc != -ETIMEDOUT)
RETURN(rc);
resends++;
if (!client_should_resend(resends, &exp->exp_obd->u.cli)) {
CERROR("%s: too many resend retries: rc = %d\n",
exp->exp_obd->obd_name, -EIO);
RETURN(-EIO);
}
/* If a signal interrupts then the timeout returned will
* not be zero. In that case return -EINTR
*/
if (msleep_interruptible(resends * 1000))
RETURN(-EINTR);
goto restart_bulk;
}
rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
req->rq_bulk->bd_nob_transferred);
if (rc < 0) {
ptlrpc_req_put(req);
RETURN(rc);
}
if (req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK) {
CERROR("%s: unexpected bytes transferred: %d (%ld expected)\n",
exp->exp_obd->obd_name, req->rq_bulk->bd_nob_transferred,
PAGE_SIZE * nfolios);
ptlrpc_req_put(req);
RETURN(-EPROTO);
}
*request = req;
RETURN(0);
}
static void mdc_release_page(struct folio *folio, int remove)
{
if (remove) {
folio_lock(folio);
if (likely(folio->mapping != NULL))
cfs_folio_delete_from_cache(folio);
folio_unlock(folio);
}
folio_put(folio);
}
static struct folio *mdc_page_locate(struct address_space *mapping, __u64 *hash,
__u64 *start, __u64 *end, int hash64)
{
/*
* Complement of hash is used as an index so that
* radix_tree_gang_lookup() can be used to find a folio with starting
* hash _smaller_ than one we are looking for.
*/
unsigned long offset = hash_x_index(*hash, hash64);
struct folio *folio;
unsigned long flags;
int found;
xa_lock_irqsave(&mapping->i_pages, flags);
found = radix_tree_gang_lookup(&mapping->i_pages,
(void **)&folio, offset, 1);
if (found > 0 && !xa_is_value(folio)) {
struct lu_dirpage *dp;
folio_get(folio);
xa_unlock_irqrestore(&mapping->i_pages, flags);
/*
* In contrast to find_lock_page() we are sure that directory
* page cannot be truncated (while DLM lock is held) and,
* hence, can avoid restart.
*
* In fact, page cannot be locked here at all, because
* mdc_read_page_remote does synchronous io.
*/
folio_wait_locked(folio);
if (folio_test_uptodate(folio)) {
u32 dflags;
dp = kmap_local_folio(folio, 0);
if (BITS_PER_LONG == 32 && hash64) {
*start = le64_to_cpu(dp->ldp_hash_start) >> 32;
*end = le64_to_cpu(dp->ldp_hash_end) >> 32;
*hash = *hash >> 32;
} else {
*start = le64_to_cpu(dp->ldp_hash_start);
*end = le64_to_cpu(dp->ldp_hash_end);
}
dflags = le32_to_cpu(dp->ldp_flags);
kunmap_local(dp);
if (unlikely(*start == 1 && *hash == 0))
*hash = *start;
else
LASSERTF(*start <= *hash,
"start = %#llx, end = %#llx, hash = %#llx\n",
*start, *end, *hash);
CDEBUG(D_VFSTRACE,
"offset %lx [%#llx %#llx], hash %#llx\n", offset,
*start, *end, *hash);
if (*hash > *end) {
mdc_release_page(folio, 0);
folio = NULL;
} else if (*end != *start && *hash == *end) {
/*
* upon hash collision, remove this page,
* otherwise put page reference, and
* mdc_read_page_remote() will issue RPC to
* fetch the page we want.
*/
mdc_release_page(folio, dflags & LDF_COLLIDE);
folio = NULL;
}
} else {
folio_put(folio);
folio = ERR_PTR(-EIO);
}
} else {
xa_unlock_irqrestore(&mapping->i_pages, flags);
folio = NULL;
}
return folio;
}
/*
* Adjust a set of pages, each page containing an array of lu_dirpages,
* so that each page can be used as a single logical lu_dirpage.
*
* A lu_dirpage is laid out as follows, where s = ldp_hash_start,
* e = ldp_hash_end, f = ldp_flags, p = padding, and each "ent" is a
* struct lu_dirent. It has size up to LU_PAGE_SIZE. The ldp_hash_end
* value is used as a cookie to request the next lu_dirpage in a
* directory listing that spans multiple pages (two in this example):
* ________
* | |
* .|--------v------- -----.
* |s|e|f|p|ent|ent| ... |ent|
* '--|-------------- -----' Each PAGE contains a single
* '------. lu_dirpage.
* .---------v------- -----.
* |s|e|f|p|ent| 0 | ... | 0 |
* '----------------- -----'
*
* However, on hosts where the native VM page size (PAGE_SIZE) is
* larger than LU_PAGE_SIZE, a single host page may contain multiple
* lu_dirpages. After reading the lu_dirpages from the MDS, the
* ldp_hash_end of the first lu_dirpage refers to the one immediately
* after it in the same PAGE (arrows simplified for brevity, but
* in general e0==s1, e1==s2, etc.):
*
* .-------------------- -----.
* |s0|e0|f0|p|ent|ent| ... |ent|
* |---v---------------- -----|
* |s1|e1|f1|p|ent|ent| ... |ent|
* |---v---------------- -----| Here, each PAGE contains
* ... multiple lu_dirpages.
* |---v---------------- -----|
* |s'|e'|f'|p|ent|ent| ... |ent|
* '---|---------------- -----'
* v
* .----------------------------.
* | next PAGE |
*
* This structure is transformed into a single logical lu_dirpage as follows:
*
* - Replace e0 with e' so the request for the next lu_dirpage gets the page
* labeled 'next PAGE'.
*
* - Copy the LDF_COLLIDE flag from f' to f0 to correctly reflect whether
* a hash collision with the next folio exists.
*
* - Adjust the lde_reclen of the ending entry of each lu_dirpage to span
* to the first entry of the next lu_dirpage.
*/
#if PAGE_SIZE > LU_PAGE_SIZE
static void mdc_adjust_dirpages(struct folio **folios, int cfs_pgs, int lu_pgs)
{
int i;
ENTRY;
for (i = 0; i < cfs_pgs; i++) {
void *addr = kmap_local_folio(folios[i], 0);
struct lu_dirpage *dp = addr;
struct lu_dirpage *first = dp;
struct lu_dirent *end_dirent = NULL;
struct lu_dirent *ent;
__u64 hash_end = dp->ldp_hash_end;
__u32 flags = dp->ldp_flags;
while (--lu_pgs > 0) {
ent = lu_dirent_start(dp);
for (end_dirent = ent; ent != NULL;
end_dirent = ent, ent = lu_dirent_next(ent))
;
/* Advance dp to next lu_dirpage. */
dp = (struct lu_dirpage *)((char *)dp + LU_PAGE_SIZE);
/* Check if we've reached the end of the PAGE. */
if (!((unsigned long)dp & ~PAGE_MASK))
break;
/* Save the hash and flags of this lu_dirpage. */
hash_end = dp->ldp_hash_end;
flags = dp->ldp_flags;
/* Check if lu_dirpage contains no entries. */
if (end_dirent == NULL)
break;
/* Enlarge the end entry lde_reclen from 0 to
* first entry of next lu_dirpage.
*/
LASSERT(le16_to_cpu(end_dirent->lde_reclen) == 0);
end_dirent->lde_reclen =
cpu_to_le16((char *)(dp->ldp_entries) -
(char *)end_dirent);
}
first->ldp_hash_end = hash_end;
first->ldp_flags &= ~cpu_to_le32(LDF_COLLIDE);
first->ldp_flags |= flags & cpu_to_le32(LDF_COLLIDE);
kunmap_local(addr);
}
LASSERTF(lu_pgs == 0, "left = %d\n", lu_pgs);
}
#else
#define mdc_adjust_dirpages(folios, cfs_pgs, lu_pgs) do {} while (0)
#endif /* PAGE_SIZE > LU_PAGE_SIZE */
static int mdc_dirpage_add(struct obd_export *exp,
struct inode *inode,
struct folio **folio_pool,
unsigned int rd_pgs,
unsigned int lu_pgs, int is_hash64)
{
int i;
ENTRY;
mdc_adjust_dirpages(folio_pool, rd_pgs, lu_pgs);
folio_mark_uptodate(folio_pool[0]);
folio_unlock(folio_pool[0]);
CDEBUG(D_CACHE, "read %u/%u\n", rd_pgs, lu_pgs);
for (i = 1; i < rd_pgs; i++) {
unsigned long offset;
__u64 hash;
int ret;
struct lu_dirpage *dp;
struct folio *folio;
folio = folio_pool[i];
folio_mark_uptodate(folio);
dp = kmap_local_folio(folio, 0);
hash = le64_to_cpu(dp->ldp_hash_start);
kunmap_local(dp);
offset = hash_x_index(hash, is_hash64);
prefetchw(&folio->flags);
ret = filemap_add_folio(inode->i_mapping, folio, offset,
GFP_KERNEL);
if (ret == 0)
folio_unlock(folio);
else
CDEBUG(D_VFSTRACE,
"folio %lu add to page cache failed: rc = %d\n",
offset, ret);
folio_put(folio);
}
return 0;
}
/* parameters for readdir folio */
struct readpage_param {
struct md_op_data *rp_mod;
__u64 rp_off;
int rp_hash64;
struct obd_export *rp_exp;
};
/**
* Read pages from server.
*
* folio_test_ in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each folio
* contains a header lu_dirpage which describes the start/end hash, and whether
* this folio is empty (contains no dir entry) or hash collide with next page.
* After client receives reply, several pages will be integrated into dir page
* in PAGE_SIZE (if PAGE_SIZE greater than LU_PAGE_SIZE), and the
* lu_dirpage for this integrated folio will be adjusted.
**/
static int do_mdc_read_folio_remote(void *data, struct folio *folio0)
{
struct readpage_param *rp = data;
struct folio **folio_pool;
struct folio *folio;
struct md_op_data *op_data = rp->rp_mod;
struct ptlrpc_request *req;
int max_pages;
struct inode *inode;
struct lu_fid *fid;
int rd_pgs = 0; /* number of pages actually read */
int lu_pgs = 0;
int nfolios;
int i;
int rc;
gfp_t gfp;
ENTRY;
max_pages = rp->rp_exp->exp_obd->u.cli.cl_max_pages_per_rpc_read;
inode = op_data->op_data;
fid = &op_data->op_fid1;
LASSERT(inode != NULL);
gfp = mapping_gfp_mask(inode->i_mapping);
OBD_ALLOC_PTR_ARRAY_LARGE(folio_pool, max_pages);
if (folio_pool != NULL) {
folio_pool[0] = folio0;
} else {
folio_pool = &folio0;
max_pages = 1;
}
for (nfolios = 1; nfolios < max_pages; nfolios++) {
folio = filemap_alloc_folio(gfp, 0, NULL);
if (IS_ERR_OR_NULL(folio))
break;
folio_pool[nfolios] = folio;
}
rc = mdc_getpage(rp->rp_exp, fid, rp->rp_off, folio_pool, nfolios,
op_data->op_projid, &req);
if (rc < 0) {
/* folio0 is special, which was added into page cache early */
cfs_folio_delete_from_cache(folio0);
folio_unlock(folio0);
goto exit;
}
rd_pgs = (req->rq_bulk->bd_nob_transferred + PAGE_SIZE - 1) >> PAGE_SHIFT;
lu_pgs = req->rq_bulk->bd_nob_transferred >> LU_PAGE_SHIFT;
LASSERT(!(req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK));
ptlrpc_req_put(req);
mdc_dirpage_add(NULL, inode, folio_pool, rd_pgs, lu_pgs, rp->rp_hash64);
exit:
/* release extra pages */
for (i = 1; i < nfolios; i++) {
folio = folio_pool[i];
if (rc < 0 || i >= rd_pgs) {
folio_put(folio);
continue;
}
}
if (folio_pool != &folio0)
OBD_FREE_PTR_ARRAY(folio_pool, max_pages);
RETURN(rc);
}
#ifdef HAVE_READ_CACHE_FOLIO_WANTS_FILE
static inline int mdc_read_folio_remote(struct file *file, struct folio *folio)
{
return do_mdc_read_folio_remote(file->private_data, folio);
}
#elif defined(HAVE___FILEMAP_GET_FOLIO)
static inline int mdc_read_folio_remote(void *data, struct page *page0)
{
return do_mdc_read_folio_remote(data, page_folio(page0));
}
#else
#define mdc_read_folio_remote do_mdc_read_folio_remote
#endif
/**
* Read dir page from cache first, if it can not find it, read it from
* server and add into the cache.
*
* \param[in] exp MDC export
* \param[in] op_data client MD stack parameters, transfering parameters
* between different layers on client MD stack.
* \param[in] mrinfo callback required for ldlm lock enqueue during
* read page
* \param[in] hash_offset the hash offset of the page to be read
* \param[in] ppage the page to be read
*
* retval = 0 get the page successfully
* errno(<0) get the page failed
*/
static int mdc_read_page(struct obd_export *exp, struct md_op_data *op_data,
struct md_readdir_info *mrinfo, __u64 hash_offset,
struct folio **pfolio)
{
struct lookup_intent it = { .it_op = IT_READDIR };
struct folio *folio;
struct inode *dir = op_data->op_data;
struct address_space *mapping;
struct lu_dirpage *dp;
__u64 start = 0;
__u64 end = 0;
struct lustre_handle lockh;
struct ptlrpc_request *enq_req = NULL;
struct readpage_param rp_param;
void *addr = NULL;
int rc;
ENTRY;
*pfolio = NULL;
LASSERT(dir != NULL);
mapping = dir->i_mapping;
rc = mdc_intent_lock(exp, op_data, &it, &enq_req,
mrinfo->mr_blocking_ast, 0);
if (enq_req != NULL)
ptlrpc_req_put(enq_req);
if (rc < 0) {
CERROR("%s: "DFID" lock enqueue fails: rc = %d\n",
exp->exp_obd->obd_name, PFID(&op_data->op_fid1), rc);
RETURN(rc);
}
rc = 0;
lockh.cookie = it.it_lock_handle;
mdc_set_lock_data(exp, &lockh, dir, NULL);
rp_param.rp_off = hash_offset;
rp_param.rp_hash64 = op_data->op_cli_flags & CLI_HASH64;
folio = mdc_page_locate(mapping, &rp_param.rp_off, &start, &end,
rp_param.rp_hash64);
if (IS_ERR(folio)) {
CERROR("%s: dir page locate: "DFID" at %llu: rc %ld\n",
exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
rp_param.rp_off, PTR_ERR(folio));
GOTO(out_unlock, rc = PTR_ERR(folio));
} else if (folio) {
/*
* XXX nikita: not entirely correct handling of a corner case:
* suppose hash chain of entries with hash value HASH crosses
* border between pages P0 and P1. First both P0 and P1 are
* cached, seekdir() is called for some entry from the P0 part
* of the chain. Later P0 goes out of cache. telldir(HASH)
* happens and finds P1, as it starts with matching hash
* value. Remaining entries from P0 part of the chain are
* skipped. (Is that really a bug?)
*
* Possible solutions: 0. don't cache P1 is such case, handle
* it as an "overflow" page. 1. invalidate all pages at
* once. 2. use HASH|1 as an index for P1.
*/
GOTO(hash_collision, folio);
}
rp_param.rp_exp = exp;
rp_param.rp_mod = op_data;
folio = ll_read_cache_folio(mapping,
hash_x_index(rp_param.rp_off,
rp_param.rp_hash64),
mdc_read_folio_remote, &rp_param);
if (IS_ERR(folio)) {
CDEBUG(D_INFO, "%s: read cache folio: "DFID" at %llu: %ld\n",
exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
rp_param.rp_off, PTR_ERR(folio));
GOTO(out_unlock, rc = PTR_ERR(folio));
}
folio_wait_locked(folio);
if (!folio_test_uptodate(folio)) {
CERROR("%s: folio not updated: "DFID" at %llu: rc %d\n",
exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
rp_param.rp_off, -5);
goto fail;
}
if (PageError(folio_page(folio, 0))) {
CERROR("%s: folio error: "DFID" at %llu: rc %d\n",
exp->exp_obd->obd_name, PFID(&op_data->op_fid1),
rp_param.rp_off, -5);
goto fail;
}
hash_collision:
addr = kmap_local_folio(folio, 0);
dp = addr;
if (BITS_PER_LONG == 32 && rp_param.rp_hash64) {
start = le64_to_cpu(dp->ldp_hash_start) >> 32;
end = le64_to_cpu(dp->ldp_hash_end) >> 32;
rp_param.rp_off = hash_offset >> 32;
} else {
start = le64_to_cpu(dp->ldp_hash_start);
end = le64_to_cpu(dp->ldp_hash_end);
rp_param.rp_off = hash_offset;
}
if (end == start) {
LASSERT(start == rp_param.rp_off);
CWARN("Page-wide hash collision: %#lx\n", (unsigned long)end);
#if BITS_PER_LONG == 32
CWARN("Real page-wide hash collision at [%llu %llu] with hash %llu\n",
le64_to_cpu(dp->ldp_hash_start),
le64_to_cpu(dp->ldp_hash_end), hash_offset);
#endif
/*
* Fetch whole overflow chain...
*
* XXX not yet.
*/
kunmap_local(addr);
goto fail;
}
kunmap_local(addr);
*pfolio = folio;
out_unlock:
ldlm_lock_decref(&lockh, it.it_lock_mode);
return rc;
fail:
mdc_release_page(folio, 1);
rc = -EIO;
goto out_unlock;
}
static int mdc_statfs_interpret(const struct lu_env *env,
struct ptlrpc_request *req, void *args, int rc)
{
struct obd_info *oinfo = args;
struct obd_statfs *osfs;
if (!rc) {
osfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
if (!osfs)
return -EPROTO;
oinfo->oi_osfs = osfs;
CDEBUG(D_CACHE,
"blocks=%llu free=%llu avail=%llu objects=%llu free=%llu state=%x\n",
osfs->os_blocks, osfs->os_bfree, osfs->os_bavail,
osfs->os_files, osfs->os_ffree, osfs->os_state);
}
oinfo->oi_cb_up(oinfo, rc);
return rc;
}
static int mdc_statfs_async(struct obd_export *exp,
struct obd_info *oinfo, time64_t max_age,
struct ptlrpc_request_set *unused)
{
struct ptlrpc_request *req;
struct obd_info *aa;
req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_STATFS,
LUSTRE_MDS_VERSION, MDS_STATFS);
if (IS_ERR(req))
return PTR_ERR(req);
ptlrpc_request_set_replen(req);
req->rq_interpret_reply = mdc_statfs_interpret;
aa = ptlrpc_req_async_args(aa, req);
*aa = *oinfo;
ptlrpcd_add_req(req);
return 0;
}
static int mdc_statfs(const struct lu_env *env,
struct obd_export *exp, struct obd_statfs *osfs,
time64_t max_age, __u32 flags)
{
struct obd_device *obd = class_exp2obd(exp);
struct req_format *fmt;
struct ptlrpc_request *req;
struct obd_statfs *msfs;
struct obd_import *imp, *imp0;
int rc;
ENTRY;
/*
* Since the request might also come from lprocfs, so we need
* sync this with client_disconnect_export Bug15684
*/
with_imp_locked(obd, imp0, rc)
imp = class_import_get(imp0);
if (rc)
RETURN(rc);
fmt = &RQF_MDS_STATFS;
if ((exp_connect_flags2(exp) & OBD_CONNECT2_SUM_STATFS) &&
(flags & OBD_STATFS_SUM))
fmt = &RQF_MDS_STATFS_NEW;
req = ptlrpc_request_alloc_pack(imp, fmt, LUSTRE_MDS_VERSION,
MDS_STATFS);
if (IS_ERR(req))
GOTO(output, rc = PTR_ERR(req));
req->rq_allow_intr = 1;
if ((flags & OBD_STATFS_SUM) &&
(exp_connect_flags2(exp) & OBD_CONNECT2_SUM_STATFS)) {
/* request aggregated states */
struct mdt_body *body;
body = req_capsule_client_get(&req->rq_pill, &RMF_MDT_BODY);
if (body == NULL)
GOTO(out, rc = -EPROTO);
body->mbo_valid = OBD_MD_FLAGSTATFS;
}
ptlrpc_request_set_replen(req);
if (flags & OBD_STATFS_NODELAY) {
/* procfs requests not want stay in wait for avoid deadlock */
req->rq_no_resend = 1;
req->rq_no_delay = 1;
}
rc = ptlrpc_queue_wait(req);
if (rc) {
/* check connection error first */
if (imp->imp_connect_error)
rc = imp->imp_connect_error;
GOTO(out, rc);
}
msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
if (msfs == NULL)
GOTO(out, rc = -EPROTO);
*osfs = *msfs;
EXIT;
out:
ptlrpc_req_put(req);
output:
class_import_put(imp);
return rc;
}
static int mdc_ioc_fid2path(struct obd_export *exp, struct getinfo_fid2path *gf)
{
__u32 keylen, vallen;
void *key;
int rc;
if (gf->gf_pathlen < 2)
RETURN(-EOVERFLOW);
/* Key is KEY_FID2PATH + getinfo_fid2path description */
keylen = round_up(sizeof(KEY_FID2PATH) + sizeof(*gf) +
sizeof(struct lu_fid), 8);
OBD_ALLOC(key, keylen);
if (key == NULL)
RETURN(-ENOMEM);
memcpy(key, KEY_FID2PATH, sizeof(KEY_FID2PATH));
memcpy(key + round_up(sizeof(KEY_FID2PATH), 8), gf, sizeof(*gf));
memcpy(key + round_up(sizeof(KEY_FID2PATH), 8) + sizeof(*gf),
gf->gf_u.gf_root_fid, sizeof(struct lu_fid));
CDEBUG(D_IOCTL, "path get "DFID" from %llu #%d\n",
PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno);
if (!fid_is_sane(&gf->gf_fid))
GOTO(out, rc = -EINVAL);
/* Val is struct getinfo_fid2path result plus path */
vallen = sizeof(*gf) + gf->gf_pathlen;
rc = obd_get_info(NULL, exp, keylen, key, &vallen, gf);
if (rc != 0 && rc != -EREMOTE)
GOTO(out, rc);
if (vallen <= sizeof(*gf))
GOTO(out, rc = -EPROTO);
if (vallen > sizeof(*gf) + gf->gf_pathlen)
GOTO(out, rc = -EOVERFLOW);
CDEBUG(D_IOCTL, "path got "DFID" from %llu #%d: %.*s\n",
PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno,
/* only log the first 512 characters of the path */
512, gf->gf_u.gf_path);
out:
OBD_FREE(key, keylen);
return rc;
}
static int mdc_ioc_hsm_progress(struct obd_export *exp,
struct hsm_progress_kernel *hpk)
{
struct obd_import *imp = class_exp2cliimp(exp);
struct hsm_progress_kernel *req_hpk;
struct ptlrpc_request *req;
int rc;
ENTRY;
req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_PROGRESS,
LUSTRE_MDS_VERSION, MDS_HSM_PROGRESS);
if (IS_ERR(req))
RETURN(PTR_ERR(req));
mdc_pack_body(&req->rq_pill, NULL, 0, 0, -1, 0, MDT_INVALID_PROJID);
/* Copy hsm_progress struct */
req_hpk = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_PROGRESS);
if (req_hpk == NULL)
GOTO(out, rc = -EPROTO);
*req_hpk = *hpk;
req_hpk->hpk_errval = lustre_errno_hton(hpk->hpk_errval);
ptlrpc_request_set_replen(req);
ptlrpc_get_mod_rpc_slot(req);
rc = ptlrpc_queue_wait(req);
ptlrpc_put_mod_rpc_slot(req);
GOTO(out, rc);
out:
ptlrpc_req_put(req);
return rc;
}
/**
* Send hsm_ct_register to MDS
*
* \param[in] imp import
* \param[in] archive_count if in bitmap format, it is the bitmap,
* else it is the count of archive_ids
* \param[in] archives if in bitmap format, it is NULL,
* else it is archive_id lists
*/
static int mdc_ioc_hsm_ct_register(struct obd_import *imp, __u32 archive_count,
__u32 *archives)
{
struct ptlrpc_request *req;
__u32 *archive_array;
size_t archives_size;
int rc;
ENTRY;
req = ptlrpc_request_alloc(imp, &RQF_MDS_HSM_CT_REGISTER);
if (req == NULL)
RETURN(-ENOMEM);
if (archives != NULL)
archives_size = sizeof(*archive_array) * archive_count;
else
archives_size = sizeof(archive_count);
req_capsule_set_size(&req->rq_pill, &RMF_MDS_HSM_ARCHIVE,
RCL_CLIENT, archives_size);
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_CT_REGISTER);
if (rc) {
ptlrpc_request_free(req);
RETURN(-ENOMEM);
}
mdc_pack_body(&req->rq_pill, NULL, 0, 0, -1, 0, MDT_INVALID_PROJID);
archive_array = req_capsule_client_get(&req->rq_pill,
&RMF_MDS_HSM_ARCHIVE);
if (archive_array == NULL)
GOTO(out, rc = -EPROTO);
if (archives != NULL)
memcpy(archive_array, archives, archives_size);
else
*archive_array = archive_count;
ptlrpc_request_set_replen(req);
rc = mdc_queue_wait(req);
GOTO(out, rc);
out:
ptlrpc_req_put(req);
return rc;
}
static int mdc_ioc_hsm_current_action(struct obd_export *exp,
struct md_op_data *op_data)
{
struct hsm_current_action *hca = op_data->op_data;
struct hsm_current_action *req_hca;
struct ptlrpc_request *req;
int rc;
ENTRY;
req = ptlrpc_request_alloc(class_exp2cliimp(exp),
&RQF_MDS_HSM_ACTION);
if (req == NULL)
RETURN(-ENOMEM);
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_ACTION);
if (rc) {
ptlrpc_request_free(req);
RETURN(rc);
}
mdc_pack_body(&req->rq_pill, &op_data->op_fid1, 0, 0,
op_data->op_suppgids[0], 0, op_data->op_projid);
ptlrpc_request_set_replen(req);
rc = mdc_queue_wait(req);
if (rc)
GOTO(out, rc);
req_hca = req_capsule_server_get(&req->rq_pill,
&RMF_MDS_HSM_CURRENT_ACTION);
if (req_hca == NULL)
GOTO(out, rc = -EPROTO);
*hca = *req_hca;
EXIT;
out:
ptlrpc_req_put(req);
return rc;
}
static int mdc_ioc_hsm_ct_unregister(struct obd_import *imp)
{
struct ptlrpc_request *req;
int rc;
ENTRY;
req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_HSM_CT_UNREGISTER,
LUSTRE_MDS_VERSION,
MDS_HSM_CT_UNREGISTER);
if (IS_ERR(req))
RETURN(PTR_ERR(req));
mdc_pack_body(&req->rq_pill, NULL, 0, 0, -1, 0, MDT_INVALID_PROJID);
ptlrpc_request_set_replen(req);
rc = mdc_queue_wait(req);
ptlrpc_req_put(req);
RETURN(rc);
}
static int mdc_ioc_hsm_state_get(struct obd_export *exp,
struct md_op_data *op_data)
{
struct hsm_user_state *hus = op_data->op_data;
struct hsm_user_state *req_hus;
struct ptlrpc_request *req;
int rc;
ENTRY;
req = ptlrpc_request_alloc(class_exp2cliimp(exp),
&RQF_MDS_HSM_STATE_GET);
if (req == NULL)
RETURN(-ENOMEM);
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_GET);
if (rc != 0) {
ptlrpc_request_free(req);
RETURN(rc);
}
mdc_pack_body(&req->rq_pill, &op_data->op_fid1, 0, 0,
op_data->op_suppgids[0], 0, op_data->op_projid);
ptlrpc_request_set_replen(req);
rc = mdc_queue_wait(req);
if (rc)
GOTO(out, rc);
req_hus = req_capsule_server_get(&req->rq_pill, &RMF_HSM_USER_STATE);
if (req_hus == NULL)
GOTO(out, rc = -EPROTO);
*hus = *req_hus;
EXIT;
out:
ptlrpc_req_put(req);
return rc;
}
static int mdc_ioc_hsm_state_set(struct obd_export *exp,
struct md_op_data *op_data)
{
struct hsm_state_set *hss = op_data->op_data;
struct hsm_state_set *req_hss;
struct ptlrpc_request *req;
int rc;
ENTRY;
req = ptlrpc_request_alloc(class_exp2cliimp(exp),
&RQF_MDS_HSM_STATE_SET);
if (req == NULL)
RETURN(-ENOMEM);
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_STATE_SET);
if (rc) {
ptlrpc_request_free(req);
RETURN(rc);
}
mdc_pack_body(&req->rq_pill, &op_data->op_fid1, 0, 0,
op_data->op_suppgids[0], 0, op_data->op_projid);
/* Copy states */
req_hss = req_capsule_client_get(&req->rq_pill, &RMF_HSM_STATE_SET);
if (req_hss == NULL)
GOTO(out, rc = -EPROTO);
*req_hss = *hss;
ptlrpc_request_set_replen(req);
ptlrpc_get_mod_rpc_slot(req);
rc = ptlrpc_queue_wait(req);
ptlrpc_put_mod_rpc_slot(req);
GOTO(out, rc);
out:
ptlrpc_req_put(req);
return rc;
}
/* For RESTORE and RELEASE the mdt will take EX lock on the file layout.
* So we can use early cancel on client side locks for that resource.
*/
static inline int mdc_hsm_request_lock_to_cancel(struct obd_export *exp,
struct hsm_user_request *hur,
struct list_head *cancels)
{
struct hsm_user_item *hui = &hur->hur_user_item[0];
struct hsm_request *req_hr = &hur->hur_request;
int count = 0;
int i;
if (req_hr->hr_action != HUA_RESTORE &&
req_hr->hr_action != HUA_RELEASE)
return 0;
for (i = 0; i < req_hr->hr_itemcount; i++, hui++) {
if (!fid_is_sane(&hui->hui_fid))
continue;
count += mdc_resource_cancel_unused(exp, &hui->hui_fid, cancels,
LCK_EX, MDS_INODELOCK_LAYOUT);
}
return count;
}
static int mdc_ioc_hsm_request(struct obd_export *exp,
struct hsm_user_request *hur)
{
struct obd_import *imp = class_exp2cliimp(exp);
struct ptlrpc_request *req;
struct hsm_request *req_hr;
struct hsm_user_item *req_hui;
char *req_opaque;
LIST_HEAD(cancels);
int count;
int rc;
ENTRY;
req = ptlrpc_request_alloc(imp, &RQF_MDS_HSM_REQUEST);
if (req == NULL)
RETURN(-ENOMEM);
req_capsule_set_size(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM, RCL_CLIENT,
hur->hur_request.hr_itemcount
* sizeof(struct hsm_user_item));
req_capsule_set_size(&req->rq_pill, &RMF_GENERIC_DATA, RCL_CLIENT,
hur->hur_request.hr_data_len);
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_REQUEST);
if (rc) {
ptlrpc_request_free(req);
RETURN(rc);
}
/* Cancel existing locks */
count = mdc_hsm_request_lock_to_cancel(exp, hur, &cancels);
ldlm_cli_cancel_list(&cancels, count, NULL, NULL, 0);
mdc_pack_body(&req->rq_pill, NULL, 0, 0, -1, 0, MDT_INVALID_PROJID);
/* Copy hsm_request struct */
req_hr = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_REQUEST);
if (req_hr == NULL)
GOTO(out, rc = -EPROTO);
*req_hr = hur->hur_request;
/* Copy hsm_user_item structs */
req_hui = req_capsule_client_get(&req->rq_pill, &RMF_MDS_HSM_USER_ITEM);
if (req_hui == NULL)
GOTO(out, rc = -EPROTO);
memcpy(req_hui, hur->hur_user_item,
hur->hur_request.hr_itemcount * sizeof(struct hsm_user_item));
/* Copy opaque field */
req_opaque = req_capsule_client_get(&req->rq_pill, &RMF_GENERIC_DATA);
if (req_opaque == NULL)
GOTO(out, rc = -EPROTO);
memcpy(req_opaque, hur_data(hur), hur->hur_request.hr_data_len);
ptlrpc_request_set_replen(req);
ptlrpc_get_mod_rpc_slot(req);
rc = ptlrpc_queue_wait(req);
ptlrpc_put_mod_rpc_slot(req);
GOTO(out, rc);
out:
ptlrpc_req_put(req);
return rc;
}
static int mdc_ioc_hsm_data_version(struct obd_export *exp,
struct md_op_data *op_data)
{
struct ptlrpc_request *req;
struct mdt_body *b;
int rc;
ENTRY;
req = ptlrpc_request_alloc(class_exp2cliimp(exp),
&RQF_MDS_HSM_DATA_VERSION);
if (req == NULL)
RETURN(-ENOMEM);
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_HSM_DATA_VERSION);
if (rc) {
ptlrpc_request_free(req);
RETURN(rc);
}
mdc_pack_body(&req->rq_pill, &op_data->op_fid1, 0, 0,
op_data->op_suppgids[0], 0, op_data->op_projid);
b = req_capsule_client_get(&req->rq_pill, &RMF_MDT_BODY);
LASSERT(b);
b->mbo_version = op_data->op_data_version;
ptlrpc_request_set_replen(req);
ptlrpc_get_mod_rpc_slot(req);
rc = ptlrpc_queue_wait(req);
ptlrpc_put_mod_rpc_slot(req);
GOTO(out, rc);
out:
ptlrpc_req_put(req);
return rc;
}
static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
struct lustre_kernelcomm *lk);
static int mdc_quotactl(struct obd_device *unused, struct obd_export *exp,
struct obd_quotactl *oqctl)
{
struct ptlrpc_request *req;
struct obd_quotactl *oqc;
int rc;
ENTRY;
req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_QUOTACTL);
if (req == NULL)
RETURN(-ENOMEM);
if (LUSTRE_Q_CMD_IS_POOL(oqctl->qc_cmd) ||
LUSTRE_Q_CMD_IS_LQA(oqctl->qc_cmd)) {
BUILD_BUG_ON(LQA_NAME_MAX != LOV_MAXPOOLNAME);
req_capsule_set_size(&req->rq_pill, &RMF_OBD_QUOTACTL,
RCL_CLIENT,
sizeof(*oqc) + LOV_MAXPOOLNAME + 1);
}
if (oqctl->qc_cmd == LUSTRE_Q_ITERQUOTA ||
oqctl->qc_cmd == LUSTRE_Q_ITEROQUOTA)
req_capsule_set_size(&req->rq_pill, &RMF_OBD_QUOTA_ITER,
RCL_SERVER, LQUOTA_ITER_BUFLEN);
else
req_capsule_set_size(&req->rq_pill, &RMF_OBD_QUOTA_ITER,
RCL_SERVER, 0);
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION,
MDS_QUOTACTL);
if (rc) {
ptlrpc_request_free(req);
RETURN(rc);
}
oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
QCTL_COPY(oqc, oqctl);
ptlrpc_request_set_replen(req);
ptlrpc_at_set_req_timeout(req);
rc = ptlrpc_queue_wait(req);
if (rc) {
CERROR("%s: ptlrpc_queue_wait failed: rc = %d\n",
exp->exp_obd->obd_name, rc);
GOTO(out, rc);
}
if (req->rq_repmsg &&
(oqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL))) {
struct list_head *lst =
(struct list_head *)(uintptr_t)(oqctl->qc_iter_list);
QCTL_COPY(oqctl, oqc);
if (oqctl->qc_cmd == LUSTRE_Q_ITERQUOTA ||
oqctl->qc_cmd == LUSTRE_Q_ITEROQUOTA) {
void *buffer;
struct lquota_iter *iter;
buffer = req_capsule_server_get(&req->rq_pill,
&RMF_OBD_QUOTA_ITER);
if (buffer == NULL) {
CDEBUG(D_QUOTA, "%s: no buffer in iter req\n",
exp->exp_obd->obd_name);
rc = -EPROTO;
GOTO(out, rc);
}
OBD_ALLOC_LARGE(iter,
sizeof(struct lquota_iter) + LQUOTA_ITER_BUFLEN);
if (iter == NULL)
GOTO(out, rc = -ENOMEM);
INIT_LIST_HEAD(&iter->li_link);
list_add(&iter->li_link, lst);
memcpy(iter->li_buffer, buffer, LQUOTA_ITER_BUFLEN);
iter->li_md_size = oqctl->qc_iter_md_buflen;
if (oqctl->qc_cmd == LUSTRE_Q_ITERQUOTA)
iter->li_dt_size = oqctl->qc_iter_dt_buflen;
oqctl->qc_iter_md_buflen = 0;
oqctl->qc_iter_dt_buflen = 0;
}
} else if (!rc) {
rc = -EPROTO;
CERROR("%s: cannot unpack obd_quotactl: rc = %d\n",
exp->exp_obd->obd_name, rc);
}
out:
ptlrpc_req_put(req);
RETURN(rc);
}
static int mdc_ioc_swap_layouts(struct obd_export *exp,
struct md_op_data *op_data)
{
struct mdc_swap_layouts *payload;
struct mdc_swap_layouts *msl;
struct ptlrpc_request *req;
LIST_HEAD(cancels);
int count;
int rc;
ENTRY;
msl = op_data->op_data;
/* When the MDT will get the MDS_SWAP_LAYOUTS RPC the
* first thing it will do is to cancel the 2 layout
* locks held by this client.
* So the client must cancel its layout locks on the 2 fids
* with the request RPC to avoid extra RPC round trips.
*/
count = mdc_resource_cancel_unused(exp, &op_data->op_fid1, &cancels,
LCK_EX, MDS_INODELOCK_LAYOUT |
MDS_INODELOCK_XATTR);
count += mdc_resource_cancel_unused(exp, &op_data->op_fid2, &cancels,
LCK_EX, MDS_INODELOCK_LAYOUT |
MDS_INODELOCK_XATTR);
req = ptlrpc_request_alloc(class_exp2cliimp(exp),
&RQF_MDS_SWAP_LAYOUTS);
if (req == NULL) {
ldlm_lock_list_put(&cancels, l_bl_ast, count);
RETURN(-ENOMEM);
}
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 4, 53, 0)
/* allow client to set msl_dv1/msl_dv2 fields until compat not needed */
req_capsule_set_size(&req->rq_pill, &RMF_SWAP_LAYOUTS, RCL_CLIENT,
sizeof(*msl));
#endif
rc = mdc_prep_elc_req(exp, req, MDS_SWAP_LAYOUTS, &cancels, count);
if (rc) {
ptlrpc_request_free(req);
RETURN(rc);
}
mdc_swap_layouts_pack(&req->rq_pill, op_data);
payload = req_capsule_client_get(&req->rq_pill, &RMF_SWAP_LAYOUTS);
LASSERT(payload);
*payload = *msl;
ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
if (rc)
GOTO(out, rc);
EXIT;
out:
ptlrpc_req_put(req);
return rc;
}
static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
void *karg, void __user *uarg)
{
struct obd_device *obd = exp->exp_obd;
struct obd_ioctl_data *data;
struct obd_import *imp = obd->u.cli.cl_import;
int rc;
ENTRY;
CDEBUG(D_IOCTL, "%s: cmd=%x len=%u karg=%pK uarg=%pK\n",
obd->obd_name, cmd, len, karg, uarg);
/* handle commands that do not need @karg first */
switch (cmd) {
case LL_IOC_GET_CONNECT_FLAGS:
if (copy_to_user(uarg, exp_connect_flags_ptr(exp),
sizeof(*exp_connect_flags_ptr(exp))))
RETURN(-EFAULT);
RETURN(0);
}
if (unlikely(karg == NULL))
RETURN(OBD_IOC_ERROR(obd->obd_name, cmd, "karg=NULL", -EINVAL));
data = karg;
if (!try_module_get(THIS_MODULE)) {
CERROR("%s: cannot get module '%s'\n", obd->obd_name,
module_name(THIS_MODULE));
return -EINVAL;
}
switch (cmd) {
case OBD_IOC_FID2PATH:
rc = mdc_ioc_fid2path(exp, karg);
GOTO(out, rc);
case LL_IOC_HSM_CT_START:
rc = mdc_ioc_hsm_ct_start(exp, karg);
/* ignore if it was already registered on this MDS. */
if (rc == -EEXIST)
rc = 0;
GOTO(out, rc);
case LL_IOC_HSM_PROGRESS:
rc = mdc_ioc_hsm_progress(exp, karg);
GOTO(out, rc);
case LL_IOC_HSM_STATE_GET:
rc = mdc_ioc_hsm_state_get(exp, karg);
GOTO(out, rc);
case LL_IOC_HSM_STATE_SET:
rc = mdc_ioc_hsm_state_set(exp, karg);
GOTO(out, rc);
case LL_IOC_HSM_ACTION:
rc = mdc_ioc_hsm_current_action(exp, karg);
GOTO(out, rc);
case LL_IOC_HSM_REQUEST:
rc = mdc_ioc_hsm_request(exp, karg);
GOTO(out, rc);
case LL_IOC_HSM_DATA_VERSION:
rc = mdc_ioc_hsm_data_version(exp, karg);
GOTO(out, rc);
case OBD_IOC_CLIENT_RECOVER:
rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1, 0);
if (rc < 0)
GOTO(out, rc);
GOTO(out, rc = 0);
#ifdef IOC_OSC_SET_ACTIVE
case_OBD_IOC_DEPRECATED_FT(IOC_OSC_SET_ACTIVE, obd->obd_name, 2, 17);
#endif
case OBD_IOC_SET_ACTIVE:
rc = ptlrpc_set_import_active(imp, data->ioc_offset);
GOTO(out, rc);
/*
* Normally IOC_OBD_STATFS, OBD_IOC_QUOTACTL iocontrol are handled by
* LMV instead of MDC. But when the cluster is upgraded from 1.8,
* there'd be no LMV layer thus we might be called here. Eventually
* this code should be removed.
* bz20731, LU-592.
*/
case IOC_OBD_STATFS: {
struct obd_statfs stat_buf = {0};
if (*((__u32 *) data->ioc_inlbuf2) != 0)
GOTO(out, rc = -ENODEV);
/* copy UUID */
if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(obd),
min((int)data->ioc_plen2,
(int)sizeof(struct obd_uuid))))
GOTO(out, rc = -EFAULT);
rc = mdc_statfs(NULL, obd->obd_self_export, &stat_buf,
ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
0);
if (rc != 0)
GOTO(out, rc);
if (copy_to_user(data->ioc_pbuf1, &stat_buf,
min((int) data->ioc_plen1,
(int) sizeof(stat_buf))))
GOTO(out, rc = -EFAULT);
GOTO(out, rc = 0);
}
case OBD_IOC_QUOTACTL: {
struct if_quotactl *qctl = karg;
struct obd_quotactl *oqctl;
OBD_ALLOC_PTR(oqctl);
if (oqctl == NULL)
GOTO(out, rc = -ENOMEM);
QCTL_COPY(oqctl, qctl);
rc = obd_quotactl(exp, oqctl);
if (rc == 0) {
QCTL_COPY_NO_PNAME(qctl, oqctl);
qctl->qc_valid = QC_MDTIDX;
qctl->obd_uuid = obd->u.cli.cl_target_uuid;
}
OBD_FREE_PTR(oqctl);
GOTO(out, rc);
}
case LL_IOC_LOV_SWAP_LAYOUTS:
rc = mdc_ioc_swap_layouts(exp, karg);
GOTO(out, rc);
default:
rc = OBD_IOC_ERROR(obd->obd_name, cmd, "unrecognized", -ENOTTY);
break;
}
out:
module_put(THIS_MODULE);
return rc;
}
static int mdc_get_info_rpc(struct obd_export *exp,
u32 keylen, void *key,
u32 vallen, void *val)
{
struct obd_import *imp = class_exp2cliimp(exp);
struct ptlrpc_request *req;
int rc = -EINVAL;
char *tmp;
ENTRY;
req = ptlrpc_request_alloc(imp, &RQF_MDS_FID2PATH);
if (req == NULL)
RETURN(-ENOMEM);
req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_KEY,
RCL_CLIENT, keylen);
req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VALLEN,
RCL_CLIENT, sizeof(vallen));
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GET_INFO);
if (rc) {
ptlrpc_request_free(req);
RETURN(rc);
}
tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_KEY);
memcpy(tmp, key, keylen);
tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_VALLEN);
memcpy(tmp, &vallen, sizeof(vallen));
req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VAL,
RCL_SERVER, vallen);
ptlrpc_request_set_replen(req);
/* if server failed to resolve FID, and OI scrub not able to fix it, it
* will return -EINPROGRESS, ptlrpc_queue_wait() will keep retrying,
* set request interruptible to avoid deadlock.
*/
if (KEY_IS(KEY_FID2PATH))
req->rq_allow_intr = 1;
rc = ptlrpc_queue_wait(req);
/* -EREMOTE means the get_info result is partial, and it needs to
* continue on another MDT, see fid2path part in lmv_iocontrol
*/
if (rc == 0 || rc == -EREMOTE) {
tmp = req_capsule_server_get(&req->rq_pill, &RMF_GETINFO_VAL);
memcpy(val, tmp, vallen);
if (req_capsule_rep_need_swab(&req->rq_pill)) {
if (KEY_IS(KEY_FID2PATH))
lustre_swab_fid2path(val);
}
}
ptlrpc_req_put(req);
RETURN(rc);
}
static void lustre_swab_hai(struct hsm_action_item *h)
{
__swab32s(&h->hai_len);
__swab32s(&h->hai_action);
lustre_swab_lu_fid(&h->hai_fid);
lustre_swab_lu_fid(&h->hai_dfid);
__swab64s(&h->hai_cookie);
__swab64s(&h->hai_extent.offset);
__swab64s(&h->hai_extent.length);
__swab64s(&h->hai_gid);
}
static void lustre_swab_hal(struct hsm_action_list *h)
{
struct hsm_action_item *hai;
__u32 i;
__swab32s(&h->hal_version);
__swab32s(&h->hal_count);
__swab32s(&h->hal_archive_id);
__swab64s(&h->hal_flags);
hai = hai_first(h);
for (i = 0; i < h->hal_count; i++, hai = hai_next(hai))
lustre_swab_hai(hai);
}
static void lustre_swab_kuch(struct kuc_hdr *l)
{
__swab16s(&l->kuc_magic);
/* __u8 l->kuc_transport */
__swab16s(&l->kuc_msgtype);
__swab16s(&l->kuc_msglen);
}
static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
struct lustre_kernelcomm *lk)
{
struct obd_import *imp = class_exp2cliimp(exp);
int rc = 0;
if (lk->lk_group != KUC_GRP_HSM) {
CERROR("Bad copytool group %d\n", lk->lk_group);
return -EINVAL;
}
CDEBUG(D_HSM, "CT start r%d w%d u%d g%d f%#x\n", lk->lk_rfd, lk->lk_wfd,
lk->lk_uid, lk->lk_group, lk->lk_flags);
if (lk->lk_flags & LK_FLG_STOP) {
/* Unregister with the coordinator */
rc = mdc_ioc_hsm_ct_unregister(imp);
} else {
__u32 *archives = NULL;
if ((lk->lk_flags & LK_FLG_DATANR) && lk->lk_data_count > 0)
archives = lk->lk_data;
rc = mdc_ioc_hsm_ct_register(imp, lk->lk_data_count, archives);
}
return rc;
}
/**
* Send a message to any listening copytools
* @param val KUC message (kuc_hdr + hsm_action_list)
* @param len total length of message
*/
static int mdc_hsm_copytool_send(const struct obd_uuid *uuid,
size_t len, void *val)
{
struct kuc_hdr *lh = (struct kuc_hdr *)val;
struct hsm_action_list *hal = (struct hsm_action_list *)(lh + 1);
int rc;
ENTRY;
if (len < sizeof(*lh) + sizeof(*hal)) {
CERROR("Short HSM message %zu < %zu\n", len,
sizeof(*lh) + sizeof(*hal));
RETURN(-EPROTO);
}
if (lh->kuc_magic == __swab16(KUC_MAGIC)) {
lustre_swab_kuch(lh);
lustre_swab_hal(hal);
} else if (lh->kuc_magic != KUC_MAGIC) {
CERROR("Bad magic %x!=%x\n", lh->kuc_magic, KUC_MAGIC);
RETURN(-EPROTO);
}
CDEBUG(D_HSM,
" Received message mg=%x t=%d m=%d l=%d actions=%d on %s\n",
lh->kuc_magic, lh->kuc_transport, lh->kuc_msgtype,
lh->kuc_msglen, hal->hal_count, hal->hal_fsname);
/* Broadcast to HSM listeners */
rc = libcfs_kkuc_group_put(uuid, KUC_GRP_HSM, lh);
RETURN(rc);
}
/**
* callback function passed to kuc for re-registering each HSM copytool
* running on MDC, after MDT shutdown/recovery.
* @param data copytool registration data
* @param cb_arg callback argument (obd_import)
*/
static int mdc_hsm_ct_reregister(void *data, void *cb_arg)
{
struct obd_import *imp = (struct obd_import *)cb_arg;
struct kkuc_ct_data *kcd = data;
__u32 *archives = NULL;
int rc;
if (kcd == NULL ||
(kcd->kcd_magic != KKUC_CT_DATA_ARRAY_MAGIC &&
kcd->kcd_magic != KKUC_CT_DATA_BITMAP_MAGIC))
return -EPROTO;
if (kcd->kcd_magic == KKUC_CT_DATA_BITMAP_MAGIC) {
CDEBUG(D_HA,
"%s: recover copytool registration to MDT (archive=%#x)\n",
imp->imp_obd->obd_name, kcd->kcd_nr_archives);
} else {
CDEBUG(D_HA,
"%s: recover copytool registration to MDT (archive nr = %u)\n",
imp->imp_obd->obd_name, kcd->kcd_nr_archives);
if (kcd->kcd_nr_archives != 0)
archives = kcd->kcd_archives;
}
rc = mdc_ioc_hsm_ct_register(imp, kcd->kcd_nr_archives, archives);
/* ignore error if the copytool is already registered */
return (rc == -EEXIST) ? 0 : rc;
}
static int mdc_kuc_reregister_thread(void *data)
{
struct obd_import *imp = data;
int rc;
ENTRY;
/* re-register HSM agents */
rc = libcfs_kkuc_group_foreach(&imp->imp_obd->obd_uuid, KUC_GRP_HSM,
mdc_hsm_ct_reregister, imp);
if (rc < 0 && rc != -EEXIST)
CWARN("%s: Failed to re-register HSM agents (uuid: %s): rc = %d\n",
imp->imp_obd->obd_name,
obd_uuid2str(&imp->imp_obd->obd_uuid), rc);
class_import_put(imp);
RETURN(rc);
}
/**
* Re-establish all kuc contexts with MDT
* after MDT shutdown/recovery.
* This is done in background.
*/
static int mdc_kuc_reregister(struct obd_import *imp)
{
struct task_struct *task;
int rc = 0;
class_import_get(imp);
task = kthread_run(mdc_kuc_reregister_thread, imp, "kuc_reregister");
if (IS_ERR(task)) {
class_import_put(imp);
rc = PTR_ERR(task);
}
return rc;
}
static int mdc_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)
{
struct obd_import *imp = class_exp2cliimp(exp);
int rc;
ENTRY;
if (KEY_IS(KEY_READ_ONLY)) {
if (vallen != sizeof(int))
RETURN(-EINVAL);
spin_lock(&imp->imp_lock);
if (*((int *)val)) {
imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
imp->imp_connect_data.ocd_connect_flags |=
OBD_CONNECT_RDONLY;
} else {
imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
imp->imp_connect_data.ocd_connect_flags &=
~OBD_CONNECT_RDONLY;
}
spin_unlock(&imp->imp_lock);
rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
keylen, key, vallen, val, set);
RETURN(rc);
}
if (KEY_IS(KEY_CHANGELOG_CLEAR)) {
rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
keylen, key, vallen, val, set);
RETURN(rc);
}
if (KEY_IS(KEY_HSM_COPYTOOL_SEND)) {
rc = mdc_hsm_copytool_send(&imp->imp_obd->obd_uuid, vallen,
val);
RETURN(rc);
}
if (KEY_IS(KEY_DEFAULT_EASIZE)) {
__u32 *default_easize = val;
exp->exp_obd->u.cli.cl_default_mds_easize = *default_easize;
RETURN(0);
}
rc = osc_set_info_async(env, exp, keylen, key, vallen, val, set);
RETURN(rc);
}
static int mdc_get_info(const struct lu_env *env, struct obd_export *exp,
__u32 keylen, void *key, __u32 *vallen, void *val)
{
int rc = -EINVAL;
if (KEY_IS(KEY_MAX_EASIZE)) {
__u32 mdsize, *max_easize;
if (*vallen != sizeof(int))
RETURN(-EINVAL);
mdsize = *(__u32 *)val;
if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
max_easize = val;
*max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
RETURN(0);
} else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
__u32 *default_easize;
if (*vallen != sizeof(int))
RETURN(-EINVAL);
default_easize = val;
*default_easize = exp->exp_obd->u.cli.cl_default_mds_easize;
RETURN(0);
} else if (KEY_IS(KEY_CONN_DATA)) {
struct obd_import *imp = class_exp2cliimp(exp);
struct obd_connect_data *data = val;
if (*vallen != sizeof(*data))
RETURN(-EINVAL);
*data = imp->imp_connect_data;
RETURN(0);
} else if (KEY_IS(KEY_TGT_COUNT)) {
*((__u32 *)val) = 1;
RETURN(0);
}
rc = mdc_get_info_rpc(exp, keylen, key, *vallen, val);
RETURN(rc);
}
static int mdc_fsync(struct obd_export *exp, const struct lu_fid *fid,
struct ptlrpc_request **request)
{
struct ptlrpc_request *req;
int rc;
ENTRY;
*request = NULL;
req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
if (req == NULL)
RETURN(-ENOMEM);
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
if (rc) {
ptlrpc_request_free(req);
RETURN(rc);
}
mdc_pack_body(&req->rq_pill, fid, 0, 0, -1, 0, MDT_INVALID_PROJID);
ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
if (rc)
ptlrpc_req_put(req);
else
*request = req;
RETURN(rc);
}
struct mdc_rmfid_args {
int *mra_rcs;
int mra_nr;
};
static int mdc_rmfid_interpret(const struct lu_env *env,
struct ptlrpc_request *req,
void *args, int rc)
{
struct mdc_rmfid_args *aa;
int *rcs, size;
ENTRY;
if (!rc) {
aa = ptlrpc_req_async_args(aa, req);
size = req_capsule_get_size(&req->rq_pill, &RMF_RCS,
RCL_SERVER);
LASSERT(size == sizeof(int) * aa->mra_nr);
rcs = req_capsule_server_get(&req->rq_pill, &RMF_RCS);
LASSERT(rcs);
LASSERT(aa->mra_rcs);
LASSERT(aa->mra_nr);
memcpy(aa->mra_rcs, rcs, size);
}
RETURN(rc);
}
static int mdc_rmfid(struct obd_export *exp, struct fid_array *fa,
int *rcs, struct ptlrpc_request_set *set)
{
struct ptlrpc_request *req;
struct mdc_rmfid_args *aa;
struct mdt_body *b;
struct lu_fid *tmp;
int rc, flen;
ENTRY;
req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_RMFID);
if (req == NULL)
RETURN(-ENOMEM);
flen = fa->fa_nr * sizeof(struct lu_fid);
req_capsule_set_size(&req->rq_pill, &RMF_FID_ARRAY,
RCL_CLIENT, flen);
req_capsule_set_size(&req->rq_pill, &RMF_FID_ARRAY,
RCL_SERVER, flen);
req_capsule_set_size(&req->rq_pill, &RMF_RCS,
RCL_SERVER, fa->fa_nr * sizeof(__u32));
rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_RMFID);
if (rc) {
ptlrpc_request_free(req);
RETURN(rc);
}
tmp = req_capsule_client_get(&req->rq_pill, &RMF_FID_ARRAY);
memcpy(tmp, fa->fa_fids, flen);
mdc_pack_body(&req->rq_pill, NULL, 0, 0, -1, 0, MDT_INVALID_PROJID);
b = req_capsule_client_get(&req->rq_pill, &RMF_MDT_BODY);
b->mbo_ctime = ktime_get_real_seconds();
ptlrpc_request_set_replen(req);
LASSERT(rcs);
aa = ptlrpc_req_async_args(aa, req);
aa->mra_rcs = rcs;
aa->mra_nr = fa->fa_nr;
req->rq_interpret_reply = mdc_rmfid_interpret;
ptlrpc_set_add_req(set, req);
ptlrpc_check_set(NULL, set);
RETURN(rc);
}
static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
enum obd_import_event event)
{
struct client_obd *cli;
int rc = 0;
ENTRY;
if (WARN_ON_ONCE(!obd || !imp || imp->imp_obd != obd))
RETURN(-ENODEV);
cli = &obd->u.cli;
if (!cli)
RETURN(-ENODEV);
switch (event) {
case IMP_EVENT_DISCON:
spin_lock(&cli->cl_loi_list_lock);
cli->cl_avail_grant = 0;
cli->cl_lost_grant = 0;
spin_unlock(&cli->cl_loi_list_lock);
break;
case IMP_EVENT_INACTIVE:
/*
* Flush current sequence to make client obtain new one
* from server in case of disconnect/reconnect.
*/
down_read(&cli->cl_seq_rwsem);
if (cli->cl_seq)
seq_client_flush(cli->cl_seq);
up_read(&cli->cl_seq_rwsem);
rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE);
break;
case IMP_EVENT_INVALIDATE: {
struct ldlm_namespace *ns = obd->obd_namespace;
struct lu_env *env;
__u16 refcheck;
ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
env = cl_env_get(&refcheck);
if (!IS_ERR(env)) {
/* Reset grants. All pages go to failing rpcs due to
* the invalid import.
*/
osc_io_unplug(env, cli, NULL);
cfs_hash_for_each_nolock(ns->ns_rs_hash,
osc_ldlm_resource_invalidate,
env, 0);
cl_env_put(env, &refcheck);
ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
} else {
rc = PTR_ERR(env);
}
break;
}
case IMP_EVENT_ACTIVE:
rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE);
/* redo the kuc registration after reconnecting */
if (rc == 0)
rc = mdc_kuc_reregister(imp);
break;
case IMP_EVENT_OCD: {
struct obd_connect_data *ocd = &imp->imp_connect_data;
if (OCD_HAS_FLAG(ocd, GRANT))
osc_init_grant(cli, ocd);
md_init_ea_size(obd->obd_self_export, ocd->ocd_max_easize, 0);
rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD);
break;
}
case IMP_EVENT_DEACTIVATE:
case IMP_EVENT_ACTIVATE:
break;
default:
CERROR("Unknown import event %x\n", event);
LBUG();
}
RETURN(rc);
}
int mdc_fid_alloc(const struct lu_env *env, struct obd_export *exp,
struct lu_fid *fid, struct md_op_data *op_data)
{
struct client_obd *cli = &exp->exp_obd->u.cli;
int rc = -EIO;
ENTRY;
down_read(&cli->cl_seq_rwsem);
if (cli->cl_seq)
rc = seq_client_alloc_fid(env, cli->cl_seq, fid);
up_read(&cli->cl_seq_rwsem);
RETURN(rc);
}
static struct obd_uuid *mdc_get_uuid(struct obd_export *exp)
{
struct client_obd *cli = &exp->exp_obd->u.cli;
return &cli->cl_target_uuid;
}
/**
* Determine whether the lock can be canceled before replaying it during
* recovery, non zero value will be return if the lock can be canceled,
* or zero returned for not
*/
static int mdc_cancel_weight(struct ldlm_lock *lock)
{
if (lock->l_resource->lr_type != LDLM_IBITS)
RETURN(0);
/* FIXME: if we ever get into a situation where there are too many
* opened files with open locks on a single node, then we really
* should replay these open locks to reget it
*/
if (lock->l_policy_data.l_inodebits.bits & MDS_INODELOCK_OPEN)
RETURN(0);
/* Special case for DoM locks, cancel only unused and granted locks */
if (ldlm_has_dom(lock) &&
(lock->l_granted_mode != lock->l_req_mode ||
osc_ldlm_weigh_ast(lock) != 0))
RETURN(0);
RETURN(1);
}
static int mdc_resource_inode_free(struct ldlm_resource *res)
{
if (res->lr_lvb_inode)
res->lr_lvb_inode = NULL;
return 0;
}
static struct ldlm_valblock_ops inode_lvbo = {
.lvbo_free = mdc_resource_inode_free
};
static int mdc_llog_init(struct obd_device *obd)
{
struct obd_llog_group *olg = &obd->obd_olg;
struct llog_ctxt *ctxt;
int rc;
ENTRY;
rc = llog_setup(NULL, obd, olg, LLOG_CHANGELOG_REPL_CTXT, obd,
&llog_client_ops);
if (rc < 0)
RETURN(rc);
ctxt = llog_group_get_ctxt(olg, LLOG_CHANGELOG_REPL_CTXT);
llog_initiator_connect(ctxt);
llog_ctxt_put(ctxt);
RETURN(0);
}
void mdc_llog_finish(struct obd_device *obd)
{
struct llog_ctxt *ctxt;
ENTRY;
ctxt = llog_get_context(obd, LLOG_CHANGELOG_REPL_CTXT);
if (ctxt != NULL)
llog_cleanup(NULL, ctxt);
EXIT;
}
int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
{
int rc;
ENTRY;
rc = osc_setup_common(obd, cfg);
if (rc < 0)
RETURN(rc);
rc = mdc_tunables_init(obd);
if (rc)
GOTO(err_osc_cleanup, rc);
obd->u.cli.cl_dom_min_inline_repsize = MDC_DOM_DEF_INLINE_REPSIZE;
obd->u.cli.cl_lsom_update = true;
ns_register_cancel(obd->obd_namespace, mdc_cancel_weight);
obd->obd_namespace->ns_lvbo = &inode_lvbo;
rc = mdc_llog_init(obd);
if (rc) {
CERROR("%s: failed to setup llogging subsystems: rc = %d\n",
obd->obd_name, rc);
GOTO(err_llog_cleanup, rc);
}
rc = mdc_changelog_cdev_init(obd);
if (rc) {
CERROR("%s: failed to setup changelog char device: rc = %d\n",
obd->obd_name, rc);
GOTO(err_changelog_cleanup, rc);
}
RETURN(rc);
err_changelog_cleanup:
mdc_llog_finish(obd);
err_llog_cleanup:
lprocfs_free_md_stats(obd);
ptlrpc_lprocfs_unregister_obd(obd);
err_osc_cleanup:
osc_cleanup_common(obd);
return rc;
}
/* Initialize the default and maximum LOV EA sizes. This allows
* us to make MDS RPCs with large enough reply buffers to hold a default
* sized EA without having to calculate this (via a call into the
* LOV + OSCs) each time we make an RPC. The maximum size is also tracked
* but not used to avoid wastefully vmalloc()'ing large reply buffers when
* a large number of stripes is possible. If a larger reply buffer is
* required it will be reallocated in the ptlrpc layer due to overflow.
*/
static int mdc_init_ea_size(struct obd_export *exp, __u32 easize,
__u32 def_easize)
{
struct obd_device *obd = exp->exp_obd;
struct client_obd *cli = &obd->u.cli;
ENTRY;
if (cli->cl_max_mds_easize < easize)
cli->cl_max_mds_easize = easize;
if (cli->cl_default_mds_easize < def_easize)
cli->cl_default_mds_easize = def_easize;
RETURN(0);
}
static const struct obd_ops mdc_obd_ops = {
.o_owner = THIS_MODULE,
.o_add_conn = client_import_add_conn,
.o_del_conn = client_import_del_conn,
.o_connect = client_connect_import,
.o_reconnect = osc_reconnect,
.o_disconnect = osc_disconnect,
.o_iocontrol = mdc_iocontrol,
.o_set_info_async = mdc_set_info_async,
.o_statfs = mdc_statfs,
.o_statfs_async = mdc_statfs_async,
.o_fid_alloc = mdc_fid_alloc,
.o_import_event = mdc_import_event,
.o_get_info = mdc_get_info,
.o_get_uuid = mdc_get_uuid,
.o_quotactl = mdc_quotactl,
};
static const struct md_ops mdc_md_ops = {
.m_get_root = mdc_get_root,
.m_null_inode = mdc_null_inode,
.m_close = mdc_close,
.m_create = mdc_create,
.m_enqueue = mdc_enqueue,
.m_enqueue_async = mdc_enqueue_async,
.m_getattr = mdc_getattr,
.m_getattr_name = mdc_getattr_name,
.m_intent_lock = mdc_intent_lock,
.m_link = mdc_link,
.m_rename = mdc_rename,
.m_setattr = mdc_setattr,
.m_setxattr = mdc_setxattr,
.m_getxattr = mdc_getxattr,
.m_fsync = mdc_fsync,
.m_file_resync = mdc_file_resync,
.m_read_page = mdc_read_page,
.m_unlink = mdc_unlink,
.m_cancel_unused = mdc_cancel_unused,
.m_init_ea_size = mdc_init_ea_size,
.m_set_lock_data = mdc_set_lock_data,
.m_lock_match = mdc_lock_match,
.m_get_lustre_md = mdc_get_lustre_md,
.m_set_open_replay_data = mdc_set_open_replay_data,
.m_clear_open_replay_data = mdc_clear_open_replay_data,
.m_intent_getattr_async = mdc_intent_getattr_async,
.m_revalidate_lock = mdc_revalidate_lock,
.m_rmfid = mdc_rmfid,
.m_batch_create = cli_batch_create,
.m_batch_stop = cli_batch_stop,
.m_batch_flush = cli_batch_flush,
.m_batch_add = mdc_batch_add,
.m_dirpage_add = mdc_dirpage_add,
};
dev_t mdc_changelog_dev;
struct class *mdc_changelog_class;
static int __init mdc_init(void)
{
int rc = 0;
rc = libcfs_setup();
if (rc)
return rc;
rc = alloc_chrdev_region(&mdc_changelog_dev, 0,
MDC_CHANGELOG_DEV_COUNT,
MDC_CHANGELOG_DEV_NAME);
if (rc)
return rc;
mdc_changelog_class = ll_class_create(MDC_CHANGELOG_DEV_NAME);
if (IS_ERR(mdc_changelog_class)) {
rc = PTR_ERR(mdc_changelog_class);
goto out_dev;
}
rc = class_register_type(&mdc_obd_ops, &mdc_md_ops, true,
LUSTRE_MDC_NAME, &mdc_device_type);
if (rc)
goto out_class;
return 0;
out_class:
class_destroy(mdc_changelog_class);
out_dev:
unregister_chrdev_region(mdc_changelog_dev, MDC_CHANGELOG_DEV_COUNT);
return rc;
}
static void __exit mdc_exit(void)
{
class_unregister_type(LUSTRE_MDC_NAME);
class_destroy(mdc_changelog_class);
unregister_chrdev_region(mdc_changelog_dev, MDC_CHANGELOG_DEV_COUNT);
idr_destroy(&mdc_changelog_minor_idr);
}
MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
MODULE_DESCRIPTION("Lustre Metadata Client");
MODULE_VERSION(LUSTRE_VERSION_STRING);
MODULE_LICENSE("GPL");
late_initcall_sync(mdc_init);
module_exit(mdc_exit);
