Viewing: ofd_dev.c
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*
* This file contains OSD API methods for OBD Filter Device (OFD),
* request handlers and supplemental functions to set OFD up and clean it up.
*
* Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
* Author: Mike Pershin <mike.pershin@intel.com>
* Author: Johann Lombardi <johann.lombardi@intel.com>
*/
/*
* The OBD Filter Device (OFD) module belongs to the Object Storage
* Server stack and connects the RPC oriented Unified Target (TGT)
* layer (see lustre/include/lu_target.h) to the storage oriented OSD
* layer (see Documentation/osd-api.txt).
*
* TGT
* | DT and OBD APIs
* OFD
* | DT API
* OSD
*
* OFD implements the LU and OBD device APIs and is responsible for:
*
* - Handling client requests (create, destroy, bulk IO, setattr,
* get_info, set_info, statfs) for the objects belonging to the OST
* (together with TGT).
*
* - Providing grant space management which allows clients to reserve
* disk space for data writeback. OFD tracks grants on global and
* per client levels.
*
* - Handling object precreation requests from MDTs.
*
* - Operating the LDLM service that allows clients to maintain object
* data cache coherence.
*/
#define DEBUG_SUBSYSTEM S_FILTER
#include <obd_class.h>
#include <obd_cksum.h>
#include <uapi/linux/lustre/lustre_param.h>
#include <lustre_fid.h>
#include <lustre_lfsck.h>
#include <lustre_dlm.h>
#include <lustre_quota.h>
#include <lustre_nodemap.h>
#include <lustre_log.h>
#include <llog_swab.h>
#include <lustre_swab.h>
#include <linux/falloc.h>
#include "ofd_internal.h"
/* Slab for OFD object allocation */
static struct kmem_cache *ofd_object_kmem;
static struct lu_kmem_descr ofd_caches[] = {
{
.ckd_cache = &ofd_object_kmem,
.ckd_name = "ofd_obj",
.ckd_size = sizeof(struct ofd_object)
},
{
.ckd_cache = NULL
}
};
/**
* ofd_connect_to_next() - Connect OFD to the next device in the stack.
* @env: execution environment
* @m: OFD device
* @next: name of next device in the stack
* @exp: export to return
*
* This function is used for device stack configuration and links OFD
* device with bottom OSD device.
*
*
* Return:
* * %0 and export in @exp if successful
* * %negative value on error
*/
static int ofd_connect_to_next(const struct lu_env *env, struct ofd_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",
ofd_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: rc = %d\n",
ofd_name(m), next, rc);
GOTO(out, rc);
}
m->ofd_dt_dev.dd_lu_dev.ld_site =
m->ofd_osd_exp->exp_obd->obd_lu_dev->ld_site;
LASSERT(m->ofd_dt_dev.dd_lu_dev.ld_site);
m->ofd_osd = lu2dt_dev(m->ofd_osd_exp->exp_obd->obd_lu_dev);
m->ofd_dt_dev.dd_lu_dev.ld_site->ls_top_dev = &m->ofd_dt_dev.dd_lu_dev;
out:
OBD_FREE_PTR(data);
RETURN(rc);
}
/**
* ofd_stack_init() - Initialize stack of devices.
* @env: execution environment
* @m: OFD device
* @cfg: Lustre config for this server
* @lmd_flags: mount flags
*
* This function initializes OFD-OSD device stack to serve OST requests
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_stack_init(const struct lu_env *env,
struct ofd_device *m, struct lustre_cfg *cfg,
unsigned long *lmd_flags)
{
const char *dev = lustre_cfg_string(cfg, 0);
struct lu_device *d;
struct ofd_thread_info *info = ofd_info(env);
struct lustre_mount_info *lmi;
struct lustre_mount_data *lmd;
int rc;
char *osdname;
ENTRY;
lmi = server_get_mount(dev);
if (lmi == NULL) {
CERROR("Cannot get mount info for %s!\n", dev);
RETURN(-ENODEV);
}
lmd = s2lsi(lmi->lmi_sb)->lsi_lmd;
if (lmd) {
if (test_bit(LMD_FLG_SKIP_LFSCK, lmd->lmd_flags))
m->ofd_skip_lfsck = 1;
if (test_bit(LMD_FLG_NO_CREATE, lmd->lmd_flags))
m->ofd_lut.lut_no_create = 1;
bitmap_copy(lmd_flags, lmd->lmd_flags, LMD_FLG_NUM_FLAGS);
}
/* find bottom osd */
OBD_ALLOC(osdname, MTI_NAME_MAXLEN);
if (osdname == NULL)
RETURN(-ENOMEM);
snprintf(osdname, MTI_NAME_MAXLEN, "%s-osd", dev);
rc = ofd_connect_to_next(env, m, osdname, &m->ofd_osd_exp);
OBD_FREE(osdname, MTI_NAME_MAXLEN);
if (rc)
RETURN(rc);
d = m->ofd_osd_exp->exp_obd->obd_lu_dev;
LASSERT(d);
m->ofd_osd = lu2dt_dev(d);
if (m->ofd_osd->dd_rdonly)
ofd_obd(m)->obd_read_only = 1;
snprintf(info->fti_u.name, sizeof(info->fti_u.name),
"%s-osd", lustre_cfg_string(cfg, 0));
RETURN(rc);
}
/**
* ofd_stack_fini() - Finalize the device stack OFD-OSD.
* @env: execution environment
* @m: OFD device
* @top: top device of stack
*
* This function cleans OFD-OSD device stack and
* disconnects OFD from the OSD.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static void ofd_stack_fini(const struct lu_env *env, struct ofd_device *m,
struct lu_device *top)
{
struct obd_device *obd = ofd_obd(m);
struct lustre_cfg_bufs bufs;
struct lustre_cfg *lcfg;
char flags[3] = "";
ENTRY;
lu_site_purge(env, top->ld_site, ~0);
/* process cleanup, pass mdt obd name to get obd umount flags */
lustre_cfg_bufs_reset(&bufs, obd->obd_name);
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));
if (m->ofd_los != NULL) {
local_oid_storage_fini(env, m->ofd_los);
m->ofd_los = NULL;
}
lu_site_purge(env, top->ld_site, ~0);
lu_site_print(env, top->ld_site, &top->ld_site->ls_obj_hash.nelems,
D_OTHER, lu_cdebug_printer);
LASSERT(m->ofd_osd_exp);
obd_disconnect(m->ofd_osd_exp);
EXIT;
}
static void ofd_stack_pre_fini(const struct lu_env *env, struct ofd_device *m,
struct lu_device *top)
{
struct lustre_cfg_bufs bufs;
struct lustre_cfg *lcfg;
ENTRY;
LASSERT(top);
lustre_cfg_bufs_reset(&bufs, ofd_name(m));
lustre_cfg_bufs_set_string(&bufs, 1, NULL);
OBD_ALLOC(lcfg, lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen));
if (!lcfg) {
CERROR("%s: failed to trigger LCFG_PRE_CLEANUP\n", ofd_name(m));
} else {
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;
}
/* For interoperability, see mdt_interop_param[]. */
static struct cfg_interop_param ofd_interop_param[] = {
{ "ost.quota_type", NULL },
{ NULL }
};
/**
* match_symlink_param() - Check if parameters are symlinks to the OSD.
* @param: parameters to check
*
* Some parameters were moved from ofd to osd and only their
* symlinks were kept in ofd by LU-3106. They are:
* -writehthrough_cache_enable
* -readcache_max_filesize
* -read_cache_enable
* -brw_stats
*
* Since they are not included by the static lprocfs var list, a pre-check
* is added for them to avoid "unknown param" errors. If they are matched
* in this check, they will be passed to the OSD directly.
*
* Return %true if param is symlink to OSD param %false otherwise
*/
static bool match_symlink_param(char *param)
{
char *sval;
int paramlen;
if (class_match_param(param, PARAM_OST, ¶m) == 0) {
sval = strchr(param, '=');
if (sval != NULL) {
paramlen = sval - param;
if (strncmp(param, "brw_stats", paramlen) == 0)
return true;
}
}
return false;
}
/**
* ofd_process_config() - Process various configuration parameters.
* @env: execution environment
* @d: LU device of OFD
* @cfg: parameters to process
*
* This function is used by MGS to process specific configurations and
* pass them through to the next device in server stack, i.e. the OSD.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_process_config(const struct lu_env *env, struct lu_device *d,
struct lustre_cfg *cfg)
{
struct ofd_device *m = ofd_dev(d);
struct dt_device *dt_next = m->ofd_osd;
struct lu_device *next = &dt_next->dd_lu_dev;
int rc;
ENTRY;
switch (cfg->lcfg_command) {
case LCFG_PARAM: {
/* 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, ofd_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;
}
}
if (match_symlink_param(param)) {
rc = next->ld_ops->ldo_process_config(env, next, cfg);
break;
}
count = class_modify_config(cfg, PARAM_OST,
&d->ld_obd->obd_kset.kobj);
if (count > 0) {
rc = 0;
break;
}
CDEBUG(D_CONFIG, "pass param %s down the stack.\n",
param);
/* we don't understand; pass it on */
rc = next->ld_ops->ldo_process_config(env, next, cfg);
break;
}
case LCFG_SPTLRPC_CONF: {
rc = -ENOTSUPP;
break;
}
default:
/* others are passed further */
rc = next->ld_ops->ldo_process_config(env, next, cfg);
break;
}
RETURN(rc);
}
/**
* ofd_object_init() - Implementation of lu_object_operations::loo_object_init
* for OFD
* @env: execution environment
* @o: lu_object of OFD object
* @conf: additional configuration parameters, not used here
*
* Allocate just the next object (OSD) in stack.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_object_init(const struct lu_env *env, struct lu_object *o,
const struct lu_object_conf *conf)
{
struct ofd_device *d = ofd_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->ofd_osd->dd_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 ofd_object_free_rcu(struct rcu_head *head)
{
struct ofd_object *of = container_of(head, struct ofd_object,
ofo_header.loh_rcu);
kmem_cache_free(ofd_object_kmem, of);
}
/**
* ofd_object_free() - Implementation of lu_object_operations::loo_object_free.
* @env: execution environment
* @o: LU object of OFD object
*
* Finish OFD object lifecycle and free its memory.
*/
static void ofd_object_free(const struct lu_env *env, struct lu_object *o)
{
struct ofd_object *of = ofd_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)));
lu_object_fini(o);
lu_object_header_fini(h);
OBD_FREE_PRE(of, sizeof(*of), "slab-freed");
call_rcu(&of->ofo_header.loh_rcu, ofd_object_free_rcu);
EXIT;
}
/**
* ofd_object_print() -Implementation of lu_object_operations::loo_object_print.
* @env: execution environment
* @cookie: opaque data passed to the printer function
* @p: printer function to use
* @o: LU object of OFD object
*
* Print OFD part of compound OFD-OSD object. See lu_object_print() and
* LU_OBJECT_DEBUG() for more details about the compound object printing.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_object_print(const struct lu_env *env, void *cookie,
lu_printer_t p, const struct lu_object *o)
{
return (*p)(env, cookie, LUSTRE_OST_NAME"-object@%p", o);
}
static const struct lu_object_operations ofd_obj_ops = {
.loo_object_init = ofd_object_init,
.loo_object_free = ofd_object_free,
.loo_object_print = ofd_object_print
};
/**
* ofd_object_alloc() - Implementation of lu_device_operations::lod_object_alloc
* @env: execution environment
* @hdr: object header, NULL for OFD
* @d: lu_device
*
* This function allocates OFD part of compound OFD-OSD object and
* initializes its header, because OFD is the top device in stack
*
* Return:
* * %allocated object if successful
* * %NULL value on failed allocation
*/
static struct lu_object *ofd_object_alloc(const struct lu_env *env,
const struct lu_object_header *hdr,
struct lu_device *d)
{
struct ofd_object *of;
ENTRY;
OBD_SLAB_ALLOC_PTR_GFP(of, ofd_object_kmem, GFP_NOFS);
if (of != NULL) {
struct lu_object *o;
struct lu_object_header *h;
o = &of->ofo_obj.do_lu;
h = &of->ofo_header;
lu_object_header_init(h);
lu_object_init(o, h, d);
lu_object_add_top(h, o);
o->lo_ops = &ofd_obj_ops;
RETURN(o);
} else {
RETURN(NULL);
}
}
/**
* ofd_lfsck_out_notify() - Return the result of LFSCK run to the OFD.
* @env: execution environment
* @data: pointer to the OFD device
* @event: LFSCK event type
*
* Notify OFD about result of LFSCK run. That may block the new object
* creation until problem is fixed by LFSCK.
*
* Return:
* * %0 if successful
* * %negative value on unknown event
*/
static int ofd_lfsck_out_notify(const struct lu_env *env, void *data,
enum lfsck_events event)
{
struct ofd_device *ofd = data;
struct obd_device *obd = ofd_obd(ofd);
switch (event) {
case LE_LASTID_REBUILDING:
CWARN("%s: Found crashed LAST_ID, deny creating new OST-object on the device until the LAST_ID rebuilt successfully.\n",
obd->obd_name);
down_write(&ofd->ofd_lastid_rwsem);
ofd->ofd_lastid_rebuilding = 1;
up_write(&ofd->ofd_lastid_rwsem);
break;
case LE_LASTID_REBUILT: {
down_write(&ofd->ofd_lastid_rwsem);
ofd_seqs_free(env, ofd);
ofd->ofd_lastid_rebuilding = 0;
ofd->ofd_lastid_gen++;
up_write(&ofd->ofd_lastid_rwsem);
CWARN("%s: Rebuilt crashed LAST_ID files successfully.\n",
obd->obd_name);
break;
}
default:
CERROR("%s: unknown lfsck event: rc = %d\n",
ofd_name(ofd), event);
return -EINVAL;
}
return 0;
}
/**
* ofd_prepare() - Called before handling of actual client requests
* @env: execution environment
* @pdev: higher device in stack, NULL for OFD
* @dev: lu_device of OFD device
*
* This method is called after layer has been initialized and before it starts
* serving user requests. In OFD it starts lfsk check routines and initializes
* recovery.
* Implementation of lu_device_operations::ldo_prepare.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_prepare(const struct lu_env *env, struct lu_device *pdev,
struct lu_device *dev)
{
struct ofd_thread_info *info;
struct ofd_device *ofd = ofd_dev(dev);
struct obd_device *obd = ofd_obd(ofd);
struct lu_device *next = &ofd->ofd_osd->dd_lu_dev;
int rc;
ENTRY;
info = ofd_info_init(env, NULL);
if (info == NULL)
RETURN(-EFAULT);
/* initialize lower device */
rc = next->ld_ops->ldo_prepare(env, dev, next);
if (rc != 0)
RETURN(rc);
rc = lfsck_register(env, ofd->ofd_osd, ofd->ofd_osd, obd,
ofd_lfsck_out_notify, ofd, false);
if (rc != 0) {
CERROR("%s: failed to initialize lfsck: rc = %d\n",
obd->obd_name, rc);
RETURN(rc);
}
rc = lfsck_register_namespace(env, ofd->ofd_osd, ofd->ofd_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);
target_recovery_init(&ofd->ofd_lut, tgt_request_handle);
CFS_FAIL_TIMEOUT_ORSET(OBD_FAIL_OST_PREPARE_DELAY, CFS_FAIL_ONCE,
(OBD_TIMEOUT_DEFAULT + 1) / 4);
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))
ofd_postrecov(env, ofd);
RETURN(rc);
}
/**
* ofd_recovery_complete() - Implementation of
* lu_device_operations::ldo_recovery_complete.
* @env: execution environment
* @dev: lu_device of OFD device
*
* This method notifies all layers about 'recovery complete' event. That means
* device is in full state and consistent. An OFD calculates available grant
* space upon this event.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_recovery_complete(const struct lu_env *env,
struct lu_device *dev)
{
struct ofd_thread_info *oti = ofd_info(env);
struct ofd_device *ofd = ofd_dev(dev);
struct lu_device *next = &ofd->ofd_osd->dd_lu_dev;
int rc = 0;
ENTRY;
/*
* Grant space for object precreation on the self export.
* The initial reserved space (i.e. 10MB for zfs and 280KB for ldiskfs)
* is enough to create 10k objects. More space is then acquired for
* precreation in tgt_grant_create().
*/
memset(&oti->fti_ocd, 0, sizeof(oti->fti_ocd));
oti->fti_ocd.ocd_grant = OST_MAX_PRECREATE / 2;
oti->fti_ocd.ocd_grant *= ofd->ofd_lut.lut_dt_conf.ddp_inodespace;
oti->fti_ocd.ocd_connect_flags = OBD_CONNECT_GRANT |
OBD_CONNECT_GRANT_PARAM;
tgt_grant_connect(env, dev->ld_obd->obd_self_export, &oti->fti_ocd,
true);
rc = next->ld_ops->ldo_recovery_complete(env, next);
RETURN(rc);
}
/*
* lu_device_operations matrix for OFD device.
*/
static const struct lu_device_operations ofd_lu_ops = {
.ldo_object_alloc = ofd_object_alloc,
.ldo_process_config = ofd_process_config,
.ldo_recovery_complete = ofd_recovery_complete,
.ldo_prepare = ofd_prepare,
};
/**
* ofd_procfs_fini() - Cleanup all procfs entries in OFD.
* @ofd: OFD device
*/
static void ofd_procfs_fini(struct ofd_device *ofd)
{
struct obd_device *obd = ofd_obd(ofd);
tgt_tunables_fini(&ofd->ofd_lut);
lprocfs_free_per_client_stats(obd);
lprocfs_obd_cleanup(obd);
ldebugfs_free_obd_stats(obd);
lprocfs_job_stats_fini(obd);
}
/**
* ofd_fid_fini() - Stop SEQ/FID server on OFD.
* @env: execution environment
* @ofd: OFD device
*
* Return:
* * %0 if successful
* * %negative value on error
*/
int ofd_fid_fini(const struct lu_env *env, struct ofd_device *ofd)
{
return seq_site_fini(env, &ofd->ofd_seq_site);
}
/**
* ofd_fid_init() - Start SEQ/FID server on OFD.
* @env: execution environment
* @ofd: OFD device
*
* The SEQ/FID server on OFD is needed to allocate FIDs for new objects.
* It also connects to the master server to get own FID sequence (SEQ) range
* to this particular OFD. Typically that happens when the OST is first
* formatted or in the rare case that it exhausts the local sequence range.
*
* The sequence range is allocated out to the MDTs for OST object allocations,
* and not directly to the clients.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
int ofd_fid_init(const struct lu_env *env, struct ofd_device *ofd)
{
struct seq_server_site *ss = &ofd->ofd_seq_site;
struct lu_device *lu = &ofd->ofd_dt_dev.dd_lu_dev;
char *obd_name = ofd_name(ofd);
char *name = NULL;
int len = strlen(obd_name) + 7;
int rc = 0;
ss = &ofd->ofd_seq_site;
lu->ld_site->ld_seq_site = ss;
ss->ss_lu = lu->ld_site;
ss->ss_node_id = ofd->ofd_lut.lut_lsd.lsd_osd_index;
OBD_ALLOC(name, len);
if (name == NULL)
return -ENOMEM;
OBD_ALLOC_PTR(ss->ss_server_seq);
if (ss->ss_server_seq == NULL)
GOTO(out_name, rc = -ENOMEM);
rc = seq_server_init(env, ss->ss_server_seq, ofd->ofd_osd, obd_name,
LUSTRE_SEQ_SERVER, ss, false);
if (rc) {
CERROR("%s: seq server init error: rc = %d\n", obd_name, rc);
GOTO(out_server, rc);
}
ss->ss_server_seq->lss_space.lsr_index = ss->ss_node_id;
OBD_ALLOC_PTR(ss->ss_client_seq);
if (ss->ss_client_seq == NULL)
GOTO(out_server, rc = -ENOMEM);
snprintf(name, len, "%s-super", obd_name);
seq_client_init(ss->ss_client_seq, NULL, LUSTRE_SEQ_DATA,
name, NULL);
rc = seq_server_set_cli(env, ss->ss_server_seq, ss->ss_client_seq);
if (rc) {
seq_client_fini(ss->ss_client_seq);
OBD_FREE_PTR(ss->ss_client_seq);
ss->ss_client_seq = NULL;
out_server:
seq_server_fini(ss->ss_server_seq, env);
OBD_FREE_PTR(ss->ss_server_seq);
ss->ss_server_seq = NULL;
}
out_name:
OBD_FREE(name, len);
return rc;
}
/**
* ofd_set_info_hdl() - OFD request handler for OST_SET_INFO RPC.
* @tsi: target session environment for this request
*
* This is OFD-specific part of request handling
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_set_info_hdl(struct tgt_session_info *tsi)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
struct ost_body *body = NULL, *repbody;
void *key, *val = NULL;
int keylen, vallen, rc = 0;
bool is_grant_shrink;
ktime_t kstart = ktime_get();
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);
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);
/*
* Because we already sync grant info with client when
* reconnect, grant info will be cleared for resent
* req, otherwise, outdated grant count in the rpc
* would de-sync grant counters
*/
if (lustre_msg_get_flags(req->rq_reqmsg) &
(MSG_RESENT | MSG_REPLAY)) {
DEBUG_REQ(D_CACHE, req,
"clear resent/replay req grant info");
body->oa.o_valid &= ~OBD_MD_FLGRANT;
}
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 if (KEY_IS(KEY_EVICT_BY_NID)) {
if (vallen > 0)
obd_export_evict_by_nid(tsi->tsi_exp->exp_obd, val);
rc = 0;
} else {
CERROR("%s: Unsupported key %s\n",
tgt_name(tsi->tsi_tgt), (char *)key);
rc = -EOPNOTSUPP;
}
ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_SET_INFO,
tsi->tsi_jobid, ktime_us_delta(ktime_get(), kstart));
RETURN(rc);
}
/**
* ofd_fiemap_get() - Get FIEMAP (FIle Extent MAPping) for object with the given
* FID.
* @env: execution environment
* @ofd: OFD device
* @fid: FID of object
* @fiemap: fiemap structure to fill with data
*
* This function returns a list of extents which describes how a file's
* blocks are laid out on the disk.
*
* Return:
* * %0 if @fiemap is filled with data successfully
* * %negative value on error
*/
int ofd_fiemap_get(const struct lu_env *env, struct ofd_device *ofd,
struct lu_fid *fid, struct fiemap *fiemap)
{
struct ofd_object *fo;
int rc;
fo = ofd_object_find(env, ofd, fid);
if (IS_ERR(fo)) {
CERROR("%s: error finding object "DFID"\n",
ofd_name(ofd), PFID(fid));
return PTR_ERR(fo);
}
ofd_read_lock(env, fo);
if (ofd_object_exists(fo))
rc = dt_fiemap_get(env, ofd_object_child(fo), fiemap);
else
rc = -ENOENT;
ofd_read_unlock(env, fo);
ofd_object_put(env, fo);
return rc;
}
static int ofd_lock_unlock_region(const struct lu_env *env,
struct ldlm_namespace *ns,
struct ldlm_res_id *res_id,
unsigned long long begin,
unsigned long long end)
{
__u64 flags = 0;
int rc;
struct lustre_handle lh = { 0 };
LASSERT(begin <= end);
rc = tgt_extent_lock(env, ns, res_id, begin, end, &lh, LCK_PR, &flags);
if (rc != 0)
return rc;
CDEBUG(D_OTHER, "ost lock [%llu,%llu], lh=%p\n", begin, end, &lh);
tgt_data_unlock(&lh, LCK_PR);
return 0;
}
/**
* lock_zero_regions() - Lock the sparse areas of given resource.
* @env: Lustre environment
* @ns: LDLM namespace
* @res_id: resource ID
* @fiemap: file extents mapping on disk
*
* The locking of sparse areas will cause dirty data to be flushed back from
* clients. This is used when getting the FIEMAP of an object to make sure
* there is no unaccounted cached data on clients.
*
* This function goes through @fiemap list of extents and locks only sparse
* areas between extents.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int lock_zero_regions(const struct lu_env *env,
struct ldlm_namespace *ns,
struct ldlm_res_id *res_id,
struct fiemap *fiemap)
{
__u64 begin = fiemap->fm_start;
unsigned int i;
int rc = 0;
struct fiemap_extent *fiemap_start = fiemap->fm_extents;
ENTRY;
CDEBUG(D_OTHER, "extents count %u\n", fiemap->fm_mapped_extents);
for (i = 0; i < fiemap->fm_mapped_extents; i++) {
if (fiemap_start[i].fe_logical > begin) {
CDEBUG(D_OTHER, "ost lock [%llu,%llu]\n",
begin, fiemap_start[i].fe_logical);
rc = ofd_lock_unlock_region(env, ns, res_id, begin,
fiemap_start[i].fe_logical);
if (rc)
RETURN(rc);
}
begin = fiemap_start[i].fe_logical + fiemap_start[i].fe_length;
}
if (begin < (fiemap->fm_start + fiemap->fm_length)) {
CDEBUG(D_OTHER, "ost lock [%llu,%llu]\n",
begin, fiemap->fm_start + fiemap->fm_length);
rc = ofd_lock_unlock_region(env, ns, res_id, begin,
fiemap->fm_start + fiemap->fm_length);
}
RETURN(rc);
}
/**
* ofd_fid2path() - load parent FID.
* @info: Per-thread common data shared by ost level handlers.
* @fp: User-provided struct for arguments and to store MDT-FID information.
*
* Part of the OST layer implementation of lfs fid2path.
*
* Return: 0 Lookup successful,
* negative errno if there was a problem
*/
static int ofd_fid2path(struct ofd_thread_info *info,
struct getinfo_fid2path *fp)
{
struct ofd_device *ofd = ofd_exp(info->fti_exp);
struct ofd_object *fo = NULL;
int rc;
ENTRY;
if (!fid_is_sane(&fp->gf_fid))
RETURN(-EINVAL);
if (!fid_is_namespace_visible(&fp->gf_fid)) {
CDEBUG(D_IOCTL,
"%s: "DFID" is invalid, f_seq should be >= %#llx, or f_oid != 0, or f_ver == 0\n",
ofd_name(ofd), PFID(&fp->gf_fid),
(__u64)FID_SEQ_NORMAL);
RETURN(-EINVAL);
}
fo = ofd_object_find(info->fti_env, ofd, &fp->gf_fid);
if (IS_ERR_OR_NULL(fo)) {
rc = IS_ERR(fo) ? PTR_ERR(fo) : -ENOENT;
CDEBUG(D_IOCTL, "%s: cannot find "DFID": rc=%d\n",
ofd_name(ofd), PFID(&fp->gf_fid), rc);
RETURN(rc);
}
if (!ofd_object_exists(fo))
GOTO(out, rc = -ENOENT);
rc = ofd_object_ff_load(info->fti_env, fo, false);
if (rc) {
CDEBUG(D_IOCTL, "%s: ff_load failed for "DFID": rc=%d\n",
ofd_name(ofd), PFID(&fp->gf_fid), rc);
GOTO(out, rc);
}
fp->gf_fid = fo->ofo_ff.ff_parent;
fp->gf_fid.f_ver = 0;
out:
if (fo)
ofd_object_put(info->fti_env, fo);
RETURN(rc);
}
static int ofd_rpc_fid2path(struct tgt_session_info *tsi,
struct ofd_thread_info *info,
void *key, int keylen,
void *val, int vallen)
{
struct getinfo_fid2path *fpout, *fpin;
int rc = 0;
fpin = key + round_up(sizeof(KEY_FID2PATH), 8);
fpout = val;
if (req_capsule_req_need_swab(tsi->tsi_pill))
lustre_swab_fid2path(fpin);
memcpy(fpout, fpin, sizeof(*fpin));
rc = ofd_fid2path(info, fpout);
RETURN(rc);
}
/**
* ofd_get_info_hdl() - OFD request handler for OST_GET_INFO RPC.
* @tsi: target session environment for this request
*
* This is OFD-specific part of request handling. The OFD-specific keys are:
* - KEY_LAST_ID (obsolete)
* - KEY_FIEMAP
* - KEY_LAST_FID
* - KEY_FID2PATH
*
* This function reads needed data from storage and fills reply with it.
*
* Note: the KEY_LAST_ID is obsolete, replaced by KEY_LAST_FID on newer MDTs,
* and is kept for compatibility.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_get_info_hdl(struct tgt_session_info *tsi)
{
struct obd_export *exp = tsi->tsi_exp;
struct ofd_device *ofd = ofd_exp(exp);
struct ofd_thread_info *fti = tsi2ofd_info(tsi);
void *key;
int keylen;
int replylen, rc = 0;
ktime_t kstart = ktime_get();
ENTRY;
/* this common part for get_info rpc */
key = req_capsule_client_get(tsi->tsi_pill, &RMF_GETINFO_KEY);
if (key == NULL) {
DEBUG_REQ(D_HA, tgt_ses_req(tsi), "no get_info key");
RETURN(err_serious(-EPROTO));
}
keylen = req_capsule_get_size(tsi->tsi_pill, &RMF_GETINFO_KEY,
RCL_CLIENT);
if (KEY_IS(KEY_LAST_ID)) {
u64 *last_id;
struct ofd_seq *oseq;
req_capsule_extend(tsi->tsi_pill, &RQF_OST_GET_INFO_LAST_ID);
rc = req_capsule_server_pack(tsi->tsi_pill);
if (rc)
RETURN(err_serious(rc));
last_id = req_capsule_server_get(tsi->tsi_pill, &RMF_OBD_ID);
oseq = ofd_seq_load(tsi->tsi_env, ofd,
(u64)exp->exp_filter_data.fed_group);
if (IS_ERR(oseq))
rc = -EFAULT;
else
*last_id = ofd_seq_last_oid(oseq);
ofd_seq_put(tsi->tsi_env, oseq);
} else if (KEY_IS(KEY_FIEMAP)) {
struct ll_fiemap_info_key *fm_key;
struct fiemap *fiemap;
struct lu_fid *fid;
req_capsule_extend(tsi->tsi_pill, &RQF_OST_GET_INFO_FIEMAP);
fm_key = req_capsule_client_get(tsi->tsi_pill, &RMF_FIEMAP_KEY);
rc = tgt_validate_obdo(tsi, &fm_key->lfik_oa);
if (rc)
RETURN(err_serious(rc));
fid = &fm_key->lfik_oa.o_oi.oi_fid;
CDEBUG(D_INODE, "get FIEMAP of object "DFID"\n", PFID(fid));
replylen = fiemap_count_to_size(
fm_key->lfik_fiemap.fm_extent_count);
req_capsule_set_size(tsi->tsi_pill, &RMF_FIEMAP_VAL,
RCL_SERVER, replylen);
rc = req_capsule_server_pack(tsi->tsi_pill);
if (rc)
RETURN(err_serious(rc));
fiemap = req_capsule_server_get(tsi->tsi_pill, &RMF_FIEMAP_VAL);
if (fiemap == NULL)
RETURN(-ENOMEM);
*fiemap = fm_key->lfik_fiemap;
rc = ofd_fiemap_get(tsi->tsi_env, ofd, fid, fiemap);
/* LU-3219: Lock the sparse areas to make sure dirty
* flushed back from client, then call fiemap again. */
if (fm_key->lfik_oa.o_valid & OBD_MD_FLFLAGS &&
fm_key->lfik_oa.o_flags & OBD_FL_SRVLOCK) {
ost_fid_build_resid(fid, &fti->fti_resid);
rc = lock_zero_regions(tsi->tsi_env, ofd->ofd_namespace,
&fti->fti_resid, fiemap);
if (rc == 0)
rc = ofd_fiemap_get(tsi->tsi_env, ofd, fid,
fiemap);
}
} else if (KEY_IS(KEY_LAST_FID)) {
struct ofd_device *ofd = ofd_exp(exp);
struct ofd_seq *oseq;
struct lu_fid *fid;
int rc;
req_capsule_extend(tsi->tsi_pill, &RQF_OST_GET_INFO_LAST_FID);
rc = req_capsule_server_pack(tsi->tsi_pill);
if (rc)
RETURN(err_serious(rc));
fid = req_capsule_client_get(tsi->tsi_pill, &RMF_FID);
if (fid == NULL)
RETURN(err_serious(-EPROTO));
fid_le_to_cpu(&fti->fti_ostid.oi_fid, fid);
fid = req_capsule_server_get(tsi->tsi_pill, &RMF_FID);
if (fid == NULL)
RETURN(-ENOMEM);
oseq = ofd_seq_load(tsi->tsi_env, ofd,
ostid_seq(&fti->fti_ostid));
if (IS_ERR(oseq))
RETURN(-EFAULT);
rc = ostid_to_fid(fid, &oseq->os_oi,
ofd->ofd_lut.lut_lsd.lsd_osd_index);
if (rc != 0)
GOTO(out_put, rc = -EFAULT);
CDEBUG(D_HA, "%s: LAST FID is "DFID"\n", ofd_name(ofd),
PFID(fid));
out_put:
ofd_seq_put(tsi->tsi_env, oseq);
} else if (KEY_IS(KEY_FID2PATH)) {
__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);
}
rc = ofd_rpc_fid2path(tsi, fti, key, keylen, valout, *vallen);
} else {
CERROR("%s: not supported key %s\n", tgt_name(tsi->tsi_tgt),
(char *)key);
rc = -EOPNOTSUPP;
}
ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_GET_INFO,
tsi->tsi_jobid, ktime_us_delta(ktime_get(), kstart));
RETURN(rc);
}
/**
* ofd_getattr_hdl() - OFD request handler for OST_GETATTR RPC.
* @tsi: target session environment for this request
*
* This is OFD-specific part of request handling. It finds the OFD object
* by its FID, gets attributes from storage and packs result to the reply.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_getattr_hdl(struct tgt_session_info *tsi)
{
struct ofd_thread_info *fti = tsi2ofd_info(tsi);
struct ofd_device *ofd = ofd_exp(tsi->tsi_exp);
struct ost_body *repbody;
struct lustre_handle lh = { 0 };
struct ofd_object *fo;
__u64 flags = 0;
enum ldlm_mode lock_mode = LCK_PR;
ktime_t kstart = ktime_get();
bool srvlock;
int rc;
ENTRY;
LASSERT(tsi->tsi_ost_body != NULL);
repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
if (repbody == NULL)
RETURN(-ENOMEM);
repbody->oa.o_oi = tsi->tsi_ost_body->oa.o_oi;
repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
srvlock = tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLFLAGS &&
tsi->tsi_ost_body->oa.o_flags & OBD_FL_SRVLOCK;
if (srvlock) {
if (unlikely(tsi->tsi_ost_body->oa.o_flags & OBD_FL_FLUSH))
lock_mode = LCK_PW;
rc = tgt_extent_lock(tsi->tsi_env,
tsi->tsi_tgt->lut_obd->obd_namespace,
&tsi->tsi_resid, 0, OBD_OBJECT_EOF, &lh,
lock_mode, &flags);
if (rc != 0)
RETURN(rc);
}
fo = ofd_object_find_exists(tsi->tsi_env, ofd, &tsi->tsi_fid);
if (IS_ERR(fo))
GOTO(out, rc = PTR_ERR(fo));
rc = ofd_attr_get(tsi->tsi_env, fo, &fti->fti_attr);
if (rc == 0) {
__u64 curr_version;
/* Queue repair of UID/GID/PROJID if not set */
ofd_repair_resource_ids(tsi->tsi_env, fo, &repbody->oa, false);
obdo_from_la(&repbody->oa, &fti->fti_attr,
OFD_VALID_FLAGS | LA_UID | LA_GID | LA_PROJID);
/* Store object version in reply */
curr_version = dt_version_get(tsi->tsi_env,
ofd_object_child(fo));
if ((__s64)curr_version != -EOPNOTSUPP) {
repbody->oa.o_valid |= OBD_MD_FLDATAVERSION;
repbody->oa.o_data_version = curr_version;
}
if (fo->ofo_ff.ff_layout_version > 0) {
repbody->oa.o_valid |= OBD_MD_LAYOUT_VERSION;
repbody->oa.o_layout_version =
fo->ofo_ff.ff_layout_version + fo->ofo_ff.ff_range;
CDEBUG(D_INODE, "%s:"DFID": get layout version: %#x\n",
tsi->tsi_tgt->lut_obd->obd_name,
PFID(&tsi->tsi_fid),
repbody->oa.o_layout_version);
}
}
ofd_object_put(tsi->tsi_env, fo);
out:
if (srvlock)
tgt_data_unlock(&lh, lock_mode);
ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_GETATTR,
tsi->tsi_jobid, ktime_us_delta(ktime_get(), kstart));
repbody->oa.o_valid |= OBD_MD_FLFLAGS;
repbody->oa.o_flags = OBD_FL_FLUSH;
RETURN(rc);
}
/**
* ofd_setattr_hdl() - OFD request handler for OST_SETATTR RPC.
* @tsi: target session environment for this request
*
* This is OFD-specific part of request handling. It finds the OFD object
* by its FID, sets attributes from request and packs result to the reply.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_setattr_hdl(struct tgt_session_info *tsi)
{
struct ofd_thread_info *fti = tsi2ofd_info(tsi);
struct ofd_device *ofd = ofd_exp(tsi->tsi_exp);
struct ost_body *body = tsi->tsi_ost_body;
struct ost_body *repbody;
struct ldlm_resource *res;
struct ofd_object *fo;
ktime_t kstart = ktime_get();
int rc = 0;
ENTRY;
LASSERT(body != NULL);
repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
if (repbody == NULL)
RETURN(-ENOMEM);
repbody->oa.o_oi = body->oa.o_oi;
repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
/* This would be very bad - accidentally truncating a file when
* changing the time or similar - bug 12203. */
if (body->oa.o_valid & OBD_MD_FLSIZE &&
body->oa.o_size != OBD_OBJECT_EOF) {
static char mdsinum[48];
if (body->oa.o_valid & OBD_MD_FLFID)
snprintf(mdsinum, sizeof(mdsinum) - 1,
"of parent "DFID, body->oa.o_parent_seq,
body->oa.o_parent_oid, 0);
else
mdsinum[0] = '\0';
CERROR("%s: setattr from %s is trying to truncate object "DFID
" %s\n", ofd_name(ofd), obd_export_nid2str(tsi->tsi_exp),
PFID(&tsi->tsi_fid), mdsinum);
RETURN(-EPERM);
}
fo = ofd_object_find_exists(tsi->tsi_env, ofd, &tsi->tsi_fid);
if (IS_ERR(fo))
GOTO(out, rc = PTR_ERR(fo));
la_from_obdo(&fti->fti_attr, &body->oa, body->oa.o_valid);
fti->fti_attr.la_valid &= ~LA_TYPE;
/* setting objects attributes (including owner/group) */
rc = ofd_attr_set(tsi->tsi_env, fo, &fti->fti_attr, &body->oa);
if (rc != 0)
GOTO(out_put, rc);
obdo_from_la(&repbody->oa, &fti->fti_attr,
OFD_VALID_FLAGS | LA_UID | LA_GID | LA_PROJID);
ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_SETATTR,
tsi->tsi_jobid, ktime_us_delta(ktime_get(), kstart));
EXIT;
out_put:
ofd_object_put(tsi->tsi_env, fo);
out:
if (rc == 0) {
/* we do not call this before to avoid lu_object_find() in
* ->lvbo_update() holding another reference on the object.
* otherwise concurrent destroy can make the object unavailable
* for 2nd lu_object_find() waiting for the first reference
* to go... deadlock! */
res = ldlm_resource_get(ofd->ofd_namespace, &tsi->tsi_resid,
LDLM_EXTENT, 0);
if (!IS_ERR(res)) {
ldlm_res_lvbo_update(res, NULL, 0);
ldlm_resource_putref(res);
}
}
return rc;
}
/**
* ofd_orphans_destroy() - Destroy OST orphans.
* @env: execution environment
* @exp: OBD export
* @ofd: OFD device
* @oa: obdo structure for reply
*
* This is part of OST_CREATE RPC handling. If there is flag OBD_FL_DELORPHAN
* set then we must destroy possible orphaned objects.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_orphans_destroy(const struct lu_env *env,
struct obd_export *exp,
struct ofd_device *ofd, struct obdo *oa)
{
struct ofd_thread_info *info = ofd_info(env);
struct lu_fid *fid = &info->fti_fid;
struct ost_id *oi = &oa->o_oi;
struct ofd_seq *oseq;
u64 seq = ostid_seq(oi);
u64 end_id = ostid_id(oi);
u64 last;
u64 oid;
int skip_orphan;
int rc = 0;
char *target_start;
int target_len;
ENTRY;
oseq = ofd_seq_get(ofd, seq);
if (oseq == NULL) {
CERROR("%s: Can not find seq for "DOSTID"\n",
ofd_name(ofd), POSTID(oi));
RETURN(-EINVAL);
}
*fid = oi->oi_fid;
last = ofd_seq_last_oid(oseq);
oid = last;
LASSERT(exp != NULL);
skip_orphan = !!(exp_connect_flags(exp) & OBD_CONNECT_SKIP_ORPHAN);
if (CFS_FAIL_CHECK(OBD_FAIL_OST_NODESTROY))
goto done;
deuuidify(exp->exp_client_uuid.uuid, NULL, &target_start, &target_len);
LCONSOLE(D_INFO, "%s: new connection from %.*s (cleaning up unused objects from "DOSTID" to "DOSTID")\n",
ofd_name(ofd), target_len, target_start, seq, end_id + 1, seq,
last);
while (oid > end_id) {
rc = fid_set_id(fid, oid);
if (unlikely(rc != 0))
GOTO(out_put, rc);
rc = ofd_destroy_by_fid(env, ofd, fid, 1);
if (rc != 0 && rc != -ENOENT && rc != -ESTALE &&
likely(rc != -EREMCHG && rc != -EINPROGRESS))
/* this is pretty fatal... */
CEMERG("%s: error destroying precreated id "
DFID": rc = %d\n",
ofd_name(ofd), PFID(fid), rc);
oid--;
if (!skip_orphan) {
ofd_seq_last_oid_set(oseq, oid);
/* update last_id on disk periodically so that if we
* restart * we don't need to re-scan all of the just
* deleted objects. */
if ((oid & 511) == 0)
ofd_seq_last_oid_write(env, ofd, oseq);
}
}
CDEBUG(D_HA, "%s: after destroy: set last_id to "DOSTID"\n",
ofd_name(ofd), seq, oid);
done:
if (!skip_orphan) {
ofd_seq_last_oid_set(oseq, oid);
rc = ofd_seq_last_oid_write(env, ofd, oseq);
} else {
/* don't reuse orphan object, return last used objid */
rc = ostid_set_id(oi, last);
}
GOTO(out_put, rc);
out_put:
ofd_seq_put(env, oseq);
return rc;
}
/**
* ofd_create_hdl() - OFD request handler for OST_CREATE RPC.
* @tsi: target session environment for this request
*
* This is OFD-specific part of request handling. Its main purpose is to
* create new data objects on OST, but it also used to destroy orphans.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_create_hdl(struct tgt_session_info *tsi)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
struct ost_body *repbody;
const struct obdo *oa = &tsi->tsi_ost_body->oa;
struct obdo *rep_oa;
struct obd_export *exp = tsi->tsi_exp;
struct ofd_device *ofd = ofd_exp(exp);
struct seq_server_site *ss = &ofd->ofd_seq_site;
__u64 seq_width = ss->ss_client_seq->lcs_width;
u64 seq = ostid_seq(&oa->o_oi);
u64 oid = ostid_id(&oa->o_oi);
struct ofd_seq *oseq;
int sync_trans = 0;
long granted = 0;
ktime_t kstart = ktime_get();
s64 diff;
int rc = 0;
ENTRY;
if (CFS_FAIL_CHECK(OBD_FAIL_OST_EROFS))
RETURN(-EROFS);
if (ofd->ofd_lut.lut_no_create)
return -EPERM;
repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
if (repbody == NULL)
RETURN(-ENOMEM);
down_read(&ofd->ofd_lastid_rwsem);
/* Currently, for safe, we do not distinguish which LAST_ID is broken,
* we may do that in the future.
* Return -ENOSPC until the LAST_ID rebuilt. */
if (unlikely(ofd->ofd_lastid_rebuilding))
GOTO(out_sem, rc = -ENOSPC);
rep_oa = &repbody->oa;
rep_oa->o_oi = oa->o_oi;
rep_oa->o_valid |= OBD_MD_FLSIZE;
rep_oa->o_size = seq_width;
LASSERT(oa->o_valid & OBD_MD_FLGROUP);
CDEBUG(D_INFO, "ofd_create("DOSTID")\n", POSTID(&oa->o_oi));
oseq = ofd_seq_load(tsi->tsi_env, ofd, seq);
if (IS_ERR(oseq)) {
CERROR("%s: Can't find FID Sequence %#llx: rc = %ld\n",
ofd_name(ofd), seq, PTR_ERR(oseq));
GOTO(out_sem, rc = -EINVAL);
}
if ((oa->o_valid & OBD_MD_FLFLAGS) &&
(oa->o_flags & OBD_FL_RECREATE_OBJS)) {
if (!test_bit(OBDF_RECOVERING, ofd_obd(ofd)->obd_flags) ||
oid > ofd_seq_last_oid(oseq)) {
CERROR("%s: recreate objid "DOSTID" > last id %llu\n",
ofd_name(ofd), POSTID(&oa->o_oi),
ofd_seq_last_oid(oseq));
GOTO(out_nolock, rc = -EINVAL);
}
/* Do nothing here, we re-create objects during recovery
* upon write replay, see ofd_preprw_write() */
GOTO(out_nolock, rc = 0);
}
/* former ofd_handle_precreate */
if ((oa->o_valid & OBD_MD_FLFLAGS) &&
(oa->o_flags & OBD_FL_DELORPHAN)) {
exp->exp_filter_data.fed_lastid_gen = ofd->ofd_lastid_gen;
CFS_FAIL_TIMEOUT(OBD_FAIL_OST_DELORPHAN_DELAY, cfs_fail_val);
/* destroy orphans */
if (lustre_msg_get_conn_cnt(tgt_ses_req(tsi)->rq_reqmsg) <
exp->exp_conn_cnt) {
CERROR("%s: dropping old orphan cleanup request\n",
ofd_name(ofd));
GOTO(out_nolock, rc = -ESTALE);
}
/* This causes inflight precreates to abort and drop lock */
oseq->os_destroys_in_progress = 1;
mutex_lock(&oseq->os_create_lock);
if (!oseq->os_destroys_in_progress) {
CDEBUG(D_HA,
"%s:[%llu] destroys_in_progress already cleared\n",
ofd_name(ofd), seq);
rc = ostid_set_id(&rep_oa->o_oi,
ofd_seq_last_oid(oseq));
GOTO(out, rc);
}
diff = oid - ofd_seq_last_oid(oseq);
CDEBUG(D_HA, "ofd_last_id() = %llu -> diff = %lld\n",
ofd_seq_last_oid(oseq), diff);
if (-diff > OST_MAX_PRECREATE) {
LCONSOLE(D_INFO, "%s: too large difference between MDS LAST_ID "
DFID" (%llu) and OST LAST_ID "DFID" "
"(%llu), trust the OST\n",
ofd_name(ofd), PFID(&oa->o_oi.oi_fid), oid,
PFID(&oseq->os_oi.oi_fid),
ofd_seq_last_oid(oseq));
/* Let MDS know that we are so far ahead. */
rc = ostid_set_id(&rep_oa->o_oi,
ofd_seq_last_oid(oseq) + 1);
} else if (diff < 0) {
rc = ofd_orphans_destroy(tsi->tsi_env, exp,
ofd, rep_oa);
oseq->os_destroys_in_progress = 0;
} else {
/* XXX: Used by MDS for the first time! */
oseq->os_destroys_in_progress = 0;
}
} else {
if (unlikely(exp->exp_filter_data.fed_lastid_gen !=
ofd->ofd_lastid_gen)) {
/* Keep the export ref so we can send the reply. */
ofd_obd_disconnect(class_export_get(exp));
GOTO(out_nolock, rc = -ENOTCONN);
}
mutex_lock(&oseq->os_create_lock);
if (lustre_msg_get_conn_cnt(tgt_ses_req(tsi)->rq_reqmsg) <
exp->exp_conn_cnt) {
CERROR("%s: dropping old precreate request\n",
ofd_name(ofd));
GOTO(out, rc = -ESTALE);
}
/* only precreate if seq is 0, IDIF or normal and also o_id
* must be specfied */
if ((!fid_seq_is_mdt(seq) && !fid_seq_is_norm(seq) &&
!fid_seq_is_idif(seq)) || oid == 0) {
diff = 1; /* shouldn't we create this right now? */
} else {
diff = oid - ofd_seq_last_oid(oseq);
/* Do sync create if the seq is about to used up */
sync_trans = ofd_seq_is_exhausted(ofd, oa);
if (sync_trans < 0)
GOTO(out, rc = sync_trans);
if (diff < 0) {
LCONSOLE(D_INFO,
"%s: MDS LAST_ID "DFID" (%llu) is %lld behind OST LAST_ID "DFID" (%llu), trust the OST\n",
ofd_name(ofd), PFID(&oa->o_oi.oi_fid),
oid, -diff, PFID(&oseq->os_oi.oi_fid),
ofd_seq_last_oid(oseq));
/* Let MDS know that we are so far ahead. */
rc = ostid_set_id(&rep_oa->o_oi,
ofd_seq_last_oid(oseq) + 1);
}
}
}
if (diff > 0) {
time64_t enough_time = ktime_get_seconds() + DISK_TIMEOUT;
bool trans_local;
u64 next_id;
int created = 0;
int count;
int rc2;
/* This can happen if a new OST is formatted and installed
* in place of an old one at the same index. Instead of
* precreating potentially millions of deleted old objects
* (possibly filling the OST), only precreate the last batch.
* LFSCK will eventually clean up any orphans. LU-14 */
if (diff > 5 * OST_MAX_PRECREATE) {
/* Message below is checked in conf-sanity test_122b */
LCONSOLE_WARN("%s: precreate FID "DOSTID" is over %lld higher than LAST_ID "DOSTID", only precreating the last %llu objects. OST replaced or reformatted?\n",
ofd_name(ofd), POSTID(&oa->o_oi), diff,
POSTID(&oseq->os_oi),
min(seq_width, (__u64)OST_MAX_PRECREATE));
/* From last created */
diff = min(seq_width, (__u64)OST_MAX_PRECREATE);
ofd_seq_last_oid_set(oseq, ostid_id(&oa->o_oi) - diff);
/* no sync_trans when recreating last batch */
sync_trans = 0;
}
if (!(oa->o_valid & OBD_MD_FLFLAGS) ||
!(oa->o_flags & OBD_FL_DELORPHAN)) {
/* don't enforce grant during orphan recovery */
granted = tgt_grant_create(tsi->tsi_env,
ofd_obd(ofd)->obd_self_export,
&diff);
if (granted < 0) {
rc = granted;
granted = 0;
CDEBUG(D_HA, "%s: failed to acquire grant space for precreate (%lld): rc = %d\n",
ofd_name(ofd), diff, rc);
diff = 0;
}
}
trans_local = !exp_connect_replay_create(req->rq_export);
while (diff > 0) {
next_id = ofd_seq_last_oid(oseq) + 1;
count = ofd_precreate_batch(ofd, (int)diff);
CDEBUG(D_HA, "%s: reserve %d objects in group %#llx at %llu\n",
ofd_name(ofd),
count, seq, next_id);
if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
&& ktime_get_seconds() > enough_time) {
CDEBUG(D_HA, "%s: Slow creates, %d/%lld objects created at a rate of %d/s\n",
ofd_name(ofd), created, diff + created,
created / DISK_TIMEOUT);
break;
}
rc = ofd_precreate_objects(tsi->tsi_env, ofd, next_id,
oseq, count, sync_trans,
trans_local);
if (rc > 0) {
created += rc;
diff -= rc;
} else if (rc < 0) {
break;
}
}
if (diff > 0 &&
lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
LCONSOLE_WARN("%s: can't create the same count of objects when replaying the request"
" (diff is %lld). see LU-4621\n",
ofd_name(ofd), diff);
if (created > 0)
/* some objects got created, we can return
* them, even if last creation failed */
rc = 0;
else
CERROR("%s: unable to precreate: rc = %d\n",
ofd_name(ofd), rc);
if (!(oa->o_valid & OBD_MD_FLFLAGS) ||
!(oa->o_flags & OBD_FL_DELORPHAN)) {
tgt_grant_commit(ofd_obd(ofd)->obd_self_export,
granted, rc);
granted = 0;
}
rc2 = ostid_set_id(&rep_oa->o_oi, ofd_seq_last_oid(oseq));
rc = rc ? : rc2;
}
EXIT;
ofd_counter_incr(exp, LPROC_OFD_STATS_CREATE,
tsi->tsi_jobid, ktime_us_delta(ktime_get(), kstart));
if (unlikely(!oseq->os_last_id_synced))
oseq->os_last_id_synced = 1;
out:
mutex_unlock(&oseq->os_create_lock);
out_nolock:
if (rc == 0)
rep_oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
ofd_seq_put(tsi->tsi_env, oseq);
out_sem:
up_read(&ofd->ofd_lastid_rwsem);
return rc;
}
/**
* ofd_destroy_hdl() - OFD request handler for OST_DESTROY RPC.
* @tsi: target session environment for this request
*
* This is OFD-specific part of request handling. It destroys data objects
* related to destroyed object on MDT.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_destroy_hdl(struct tgt_session_info *tsi)
{
const struct ost_body *body = tsi->tsi_ost_body;
struct ost_body *repbody;
struct ofd_device *ofd = ofd_exp(tsi->tsi_exp);
struct ofd_thread_info *fti = tsi2ofd_info(tsi);
struct lu_fid *fid = &fti->fti_fid;
ktime_t kstart = ktime_get();
u64 oid;
u32 count;
int rc = 0;
ENTRY;
if (CFS_FAIL_CHECK(OBD_FAIL_OST_EROFS))
RETURN(-EROFS);
/* This is old case for clients before Lustre 2.4 */
/* If there's a DLM request, cancel the locks mentioned in it */
if (req_capsule_field_present(tsi->tsi_pill, &RMF_DLM_REQ,
RCL_CLIENT)) {
struct ldlm_request *dlm;
dlm = req_capsule_client_get(tsi->tsi_pill, &RMF_DLM_REQ);
if (dlm == NULL)
RETURN(-EFAULT);
ldlm_request_cancel(tgt_ses_req(tsi), dlm, 0, LATF_SKIP);
}
*fid = body->oa.o_oi.oi_fid;
oid = ostid_id(&body->oa.o_oi);
LASSERT(oid != 0);
repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
/* check that o_misc makes sense */
if (body->oa.o_valid & OBD_MD_FLOBJCOUNT)
count = body->oa.o_misc;
else
count = 1; /* default case - single destroy */
CDEBUG(D_HA, "%s: Destroy object "DOSTID" count %d\n", ofd_name(ofd),
POSTID(&body->oa.o_oi), count);
while (count > 0) {
int lrc;
lrc = ofd_destroy_by_fid(tsi->tsi_env, ofd, fid, 0);
if (lrc == -ENOENT) {
CDEBUG(D_INODE,
"%s: destroying non-existent object "DFID"\n",
ofd_name(ofd), PFID(fid));
/* rewrite rc with -ENOENT only if it is 0 */
if (rc == 0)
rc = lrc;
} else if (lrc != 0) {
CERROR("%s: error destroying object "DFID": %d\n",
ofd_name(ofd), PFID(fid), lrc);
rc = lrc;
}
count--;
oid++;
lrc = fid_set_id(fid, oid);
if (unlikely(lrc != 0 && count > 0))
GOTO(out, rc = lrc);
}
ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_DESTROY,
tsi->tsi_jobid, ktime_us_delta(ktime_get(), kstart));
GOTO(out, rc);
out:
fid_to_ostid(fid, &repbody->oa.o_oi);
return rc;
}
/**
* ofd_statfs_hdl() - OFD request handler for OST_STATFS RPC.
* @tsi: target session environment for this request
*
* This function gets statfs data from storage as part of request
* processing.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_statfs_hdl(struct tgt_session_info *tsi)
{
ktime_t kstart = ktime_get();
struct obd_statfs *osfs;
int rc;
ENTRY;
CFS_FAIL_TIMEOUT(OBD_FAIL_OST_STATFS_DELAY, 10);
osfs = req_capsule_server_get(tsi->tsi_pill, &RMF_OBD_STATFS);
rc = ofd_statfs(tsi->tsi_env, tsi->tsi_exp, osfs,
ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS, 0);
if (rc != 0)
CERROR("%s: statfs failed: rc = %d\n",
tgt_name(tsi->tsi_tgt), rc);
if (CFS_FAIL_CHECK(OBD_FAIL_OST_STATFS_EINPROGRESS))
rc = -EINPROGRESS;
ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_STATFS,
tsi->tsi_jobid, ktime_us_delta(ktime_get(), kstart));
RETURN(rc);
}
/**
* ofd_sync_hdl() - OFD request handler for OST_SYNC RPC.
* @tsi: target session environment for this request
*
* Sync object data or all filesystem data to the disk and pack the
* result in reply.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_sync_hdl(struct tgt_session_info *tsi)
{
struct ost_body *body = tsi->tsi_ost_body;
struct ost_body *repbody;
struct ofd_thread_info *fti = tsi2ofd_info(tsi);
struct ofd_device *ofd = ofd_exp(tsi->tsi_exp);
struct ofd_object *fo = NULL;
ktime_t kstart = ktime_get();
int rc = 0;
ENTRY;
repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
/* if no objid is specified, it means "sync whole filesystem" */
if (!fid_is_zero(&tsi->tsi_fid)) {
fo = ofd_object_find_exists(tsi->tsi_env, ofd, &tsi->tsi_fid);
if (IS_ERR(fo))
RETURN(PTR_ERR(fo));
}
rc = tgt_sync(tsi->tsi_env, tsi->tsi_tgt,
fo != NULL ? ofd_object_child(fo) : NULL,
repbody->oa.o_size, repbody->oa.o_blocks);
if (rc)
GOTO(put, rc);
ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_SYNC,
tsi->tsi_jobid, ktime_us_delta(ktime_get(), kstart));
if (fo == NULL)
RETURN(0);
repbody->oa.o_oi = body->oa.o_oi;
repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
rc = ofd_attr_get(tsi->tsi_env, fo, &fti->fti_attr);
if (rc == 0)
obdo_from_la(&repbody->oa, &fti->fti_attr,
OFD_VALID_FLAGS);
else
/* don't return rc from getattr */
rc = 0;
EXIT;
put:
if (fo != NULL)
ofd_object_put(tsi->tsi_env, fo);
return rc;
}
/**
* ofd_fallocate_hdl() - OFD request handler for OST_FALLOCATE RPC.
* @tsi: target session environment for this request
*
* This is part of request processing. Validate request fields,
* preallocate the given OFD object and pack reply.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_fallocate_hdl(struct tgt_session_info *tsi)
{
struct obdo *oa = &tsi->tsi_ost_body->oa;
struct ost_body *repbody;
struct ofd_thread_info *info = tsi2ofd_info(tsi);
struct ldlm_namespace *ns = tsi->tsi_tgt->lut_obd->obd_namespace;
struct ldlm_resource *res;
struct ofd_object *fo;
__u64 flags = 0;
__u64 valid;
struct lustre_handle lh = { 0, };
int rc, mode;
__u64 start, end;
bool srvlock;
ktime_t kstart = ktime_get();
repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
if (repbody == NULL)
RETURN(err_serious(-ENOMEM));
/*
* fallocate() start and end are passed in o_size and o_blocks
* on the wire. Clients 2.15.0 and newer should always set
* the OBD_MD_FLSIZE and OBD_MD_FLBLOCKS valid flags, but some
* older client (exp_old_falloc is true) versions did not.
* We permit older clients to not set these flags, checking their
* version by proxy using the lack of OBD_CONNECT_TRUNCLOCK to
* imply 2.14.0 and older.
*
* Return -EOPNOTSUPP to also work with older clients not
* supporting newer server modes.
*/
if ((oa->o_valid & (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)) !=
(OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 21, 53, 0)
&& !tsi->tsi_exp->exp_old_falloc
#endif
)
RETURN(-EOPNOTSUPP);
start = oa->o_size;
end = oa->o_blocks;
CDEBUG(D_INFO, "%s: start: %llu end: %llu\n", tgt_name(tsi->tsi_tgt),
start, end);
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 21, 53, 0)
/* For inter-op case with older clients (where exp_old_falloc is true)
* fallocate() start and end are passed in as 0 (For interior case
* where end offset less than file size) This is fixed later.
* For such cases we return -EOPNOTSUPP
*/
if (tsi->tsi_exp->exp_old_falloc && start >= end)
RETURN(-EOPNOTSUPP);
#endif
/* client should already limit len >= 0 */
if (start >= end)
RETURN(-EINVAL);
mode = oa->o_falloc_mode;
/*
* mode == 0 (which is standard prealloc) and PUNCH/ZERO are supported
* Rest of mode options are not supported yet.
*/
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
FALLOC_FL_ZERO_RANGE))
RETURN(-EOPNOTSUPP);
/* PUNCH_HOLE mode should always be accompanied with KEEP_SIZE flag
* Check that and add the missing flag for such invalid call with
* warning.
*/
if (mode & FALLOC_FL_PUNCH_HOLE && !(mode & FALLOC_FL_KEEP_SIZE)) {
CDEBUG(D_INFO, "%s: PUNCH mode misses KEEP_SIZE flag, setting it\n",
tsi->tsi_tgt->lut_obd->obd_name);
mode |= FALLOC_FL_KEEP_SIZE;
}
repbody->oa.o_oi = oa->o_oi;
repbody->oa.o_valid = OBD_MD_FLID;
srvlock = oa->o_valid & OBD_MD_FLFLAGS &&
oa->o_flags & OBD_FL_SRVLOCK;
if (srvlock) {
rc = tgt_extent_lock(tsi->tsi_env, ns, &tsi->tsi_resid,
start, end, &lh, LCK_PW, &flags);
if (rc != 0)
RETURN(rc);
}
fo = ofd_object_find_exists(tsi->tsi_env, ofd_exp(tsi->tsi_exp),
&tsi->tsi_fid);
if (IS_ERR(fo))
GOTO(out, rc = PTR_ERR(fo));
valid = OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLPROJID |
OBD_MD_FLATIME | OBD_MD_FLMTIME | OBD_MD_FLCTIME;
la_from_obdo(&info->fti_attr, oa, valid);
rc = ofd_object_fallocate(tsi->tsi_env, fo, start, end, mode,
&info->fti_attr, oa);
if (rc)
GOTO(out_put, rc);
rc = ofd_attr_get(tsi->tsi_env, fo, &info->fti_attr);
if (rc == 0)
obdo_from_la(&repbody->oa, &info->fti_attr, OFD_VALID_FLAGS);
else
rc = 0;
ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_PREALLOC,
tsi->tsi_jobid, ktime_us_delta(ktime_get(), kstart));
EXIT;
out_put:
ofd_object_put(tsi->tsi_env, fo);
out:
if (srvlock)
tgt_data_unlock(&lh, LCK_PW);
if (rc == 0) {
res = ldlm_resource_get(ns, &tsi->tsi_resid, LDLM_EXTENT, 0);
if (!IS_ERR(res)) {
struct ost_lvb *res_lvb;
ldlm_res_lvbo_update(res, NULL, 0);
res_lvb = res->lr_lvb_data;
/* Blocks */
repbody->oa.o_valid |= OBD_MD_FLBLOCKS;
repbody->oa.o_blocks = res_lvb->lvb_blocks;
/* Size */
repbody->oa.o_valid |= OBD_MD_FLSIZE;
repbody->oa.o_size = res_lvb->lvb_size;
ldlm_resource_putref(res);
}
}
RETURN(rc);
}
/**
* ofd_punch_hdl() - OFD request handler for OST_PUNCH RPC.
* @tsi: target session environment for this request
*
* This is part of request processing. Validate request fields,
* punch (truncate) the given OFD object and pack reply.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_punch_hdl(struct tgt_session_info *tsi)
{
const struct obdo *oa = &tsi->tsi_ost_body->oa;
struct ost_body *repbody;
struct ofd_thread_info *info = tsi2ofd_info(tsi);
struct ldlm_namespace *ns = tsi->tsi_tgt->lut_obd->obd_namespace;
struct ldlm_resource *res;
struct ofd_object *fo;
__u64 flags = 0;
struct lustre_handle lh = { 0, };
__u64 start, end;
bool srvlock;
ktime_t kstart = ktime_get();
int rc;
ENTRY;
CFS_FAIL_TIMEOUT(OBD_FAIL_OST_PAUSE_PUNCH, cfs_fail_val);
if ((oa->o_valid & (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)) !=
(OBD_MD_FLSIZE | OBD_MD_FLBLOCKS))
RETURN(err_serious(-EPROTO));
repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
if (repbody == NULL)
RETURN(err_serious(-ENOMEM));
/* punch start,end are passed in o_size,o_blocks throught wire */
start = oa->o_size;
end = oa->o_blocks;
if (end != OBD_OBJECT_EOF) /* Only truncate is supported */
RETURN(-EPROTO);
/* standard truncate optimization: if file body is completely
* destroyed, don't send data back to the server. */
if (start == 0)
flags |= LDLM_FL_AST_DISCARD_DATA;
repbody->oa.o_oi = oa->o_oi;
repbody->oa.o_valid = OBD_MD_FLID;
srvlock = oa->o_valid & OBD_MD_FLFLAGS &&
oa->o_flags & OBD_FL_SRVLOCK;
if (srvlock) {
rc = tgt_extent_lock(tsi->tsi_env, ns, &tsi->tsi_resid, start,
end, &lh, LCK_PW, &flags);
if (rc != 0)
RETURN(rc);
}
CDEBUG(D_INODE, "calling punch for object "DFID", valid = %#llx, start = %lld, end = %lld\n",
PFID(&tsi->tsi_fid),
oa->o_valid, start, end);
fo = ofd_object_find_exists(tsi->tsi_env, ofd_exp(tsi->tsi_exp),
&tsi->tsi_fid);
if (IS_ERR(fo))
GOTO(out, rc = PTR_ERR(fo));
la_from_obdo(&info->fti_attr, oa,
OBD_MD_FLMTIME | OBD_MD_FLATIME | OBD_MD_FLCTIME |
OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLPROJID);
info->fti_attr.la_size = start;
info->fti_attr.la_valid |= LA_SIZE;
rc = ofd_object_punch(tsi->tsi_env, fo, start, end, &info->fti_attr,
(struct obdo *)oa);
if (rc)
GOTO(out_put, rc);
ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_PUNCH,
tsi->tsi_jobid, ktime_us_delta(ktime_get(), kstart));
EXIT;
out_put:
ofd_object_put(tsi->tsi_env, fo);
out:
if (srvlock)
tgt_data_unlock(&lh, LCK_PW);
if (rc == 0) {
/* we do not call this before to avoid lu_object_find() in
* ->lvbo_update() holding another reference on the object.
* otherwise concurrent destroy can make the object unavailable
* for 2nd lu_object_find() waiting for the first reference
* to go... deadlock! */
res = ldlm_resource_get(ns, &tsi->tsi_resid, LDLM_EXTENT, 0);
if (!IS_ERR(res)) {
struct ost_lvb *res_lvb;
ldlm_res_lvbo_update(res, NULL, 0);
res_lvb = res->lr_lvb_data;
repbody->oa.o_valid |= OBD_MD_FLBLOCKS;
repbody->oa.o_blocks = res_lvb->lvb_blocks;
ldlm_resource_putref(res);
}
}
return rc;
}
static int ofd_ladvise_prefetch(const struct lu_env *env,
struct ofd_object *fo,
struct niobuf_local *lnb,
__u64 start, __u64 end, enum dt_bufs_type dbt)
{
struct ofd_thread_info *info = ofd_info(env);
pgoff_t start_index, end_index, pages;
struct niobuf_remote rnb;
unsigned long nr_local;
int rc = 0;
if (end <= start)
RETURN(-EINVAL);
ofd_read_lock(env, fo);
if (!ofd_object_exists(fo))
GOTO(out_unlock, rc = -ENOENT);
rc = ofd_attr_get(env, fo, &info->fti_attr);
if (rc)
GOTO(out_unlock, rc);
if (end > info->fti_attr.la_size)
end = info->fti_attr.la_size;
if (end <= start)
GOTO(out_unlock, rc);
/* We need page aligned offset and length */
start_index = start >> PAGE_SHIFT;
end_index = (end - 1) >> PAGE_SHIFT;
pages = end_index - start_index + 1;
while (pages > 0) {
nr_local = pages <= PTLRPC_MAX_BRW_PAGES ? pages :
PTLRPC_MAX_BRW_PAGES;
rnb.rnb_offset = start_index << PAGE_SHIFT;
rnb.rnb_len = nr_local << PAGE_SHIFT;
rc = dt_bufs_get(env, ofd_object_child(fo), &rnb, lnb,
PTLRPC_MAX_BRW_PAGES, dbt);
if (unlikely(rc < 0))
break;
nr_local = rc;
rc = dt_read_prep(env, ofd_object_child(fo), lnb, nr_local);
dt_bufs_put(env, ofd_object_child(fo), lnb, nr_local);
if (unlikely(rc))
break;
start_index += nr_local;
pages -= nr_local;
}
out_unlock:
ofd_read_unlock(env, fo);
RETURN(rc);
}
/**
* ofd_ladvise_hdl() - OFD request handler for OST_LADVISE RPC.
* @tsi: target session environment for this request
*
* Tune cache or perfetch policies according to advices.
*
* Return:
* * %0 if successful
* * %negative errno on error
*/
static int ofd_ladvise_hdl(struct tgt_session_info *tsi)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
struct obd_export *exp = tsi->tsi_exp;
struct ofd_device *ofd = ofd_exp(exp);
struct ost_body *body, *repbody;
struct ofd_thread_info *info;
struct ofd_object *fo;
struct ptlrpc_thread *svc_thread = req->rq_svc_thread;
const struct lu_env *env = svc_thread->t_env;
struct tgt_thread_big_cache *tbc = svc_thread->t_data;
enum dt_bufs_type dbt = DT_BUFS_TYPE_READAHEAD;
struct lu_ladvise *ladvise;
int num_advise;
struct ladvise_hdr *ladvise_hdr;
struct obd_ioobj ioo;
struct lustre_handle lockh = { 0 };
__u64 flags = 0;
int i;
struct dt_object *dob;
__u64 start;
__u64 end;
int rc = 0;
ENTRY;
CFS_FAIL_TIMEOUT(OBD_FAIL_OST_LADVISE_PAUSE, cfs_fail_val);
body = tsi->tsi_ost_body;
if ((body->oa.o_valid & OBD_MD_FLID) != OBD_MD_FLID)
RETURN(err_serious(-EPROTO));
ladvise_hdr = req_capsule_client_get(tsi->tsi_pill,
&RMF_OST_LADVISE_HDR);
if (ladvise_hdr == NULL)
RETURN(err_serious(-EPROTO));
if (ladvise_hdr->lah_magic != LADVISE_MAGIC ||
ladvise_hdr->lah_count < 1)
RETURN(err_serious(-EPROTO));
if ((ladvise_hdr->lah_flags & (~LF_MASK)) != 0)
RETURN(err_serious(-EPROTO));
ladvise = req_capsule_client_get(tsi->tsi_pill, &RMF_OST_LADVISE);
if (ladvise == NULL)
RETURN(err_serious(-EPROTO));
num_advise = req_capsule_get_size(&req->rq_pill,
&RMF_OST_LADVISE, RCL_CLIENT) /
sizeof(*ladvise);
if (num_advise < ladvise_hdr->lah_count)
RETURN(err_serious(-EPROTO));
repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
repbody->oa = body->oa;
info = ofd_info_init(env, exp);
rc = ostid_to_fid(&info->fti_fid, &body->oa.o_oi,
ofd->ofd_lut.lut_lsd.lsd_osd_index);
if (rc != 0)
RETURN(rc);
fo = ofd_object_find(env, ofd, &info->fti_fid);
if (IS_ERR(fo)) {
rc = PTR_ERR(fo);
RETURN(rc);
}
LASSERT(fo != NULL);
dob = ofd_object_child(fo);
if (exp->exp_connection &&
LNetIsPeerLocal(&exp->exp_connection->c_peer.nid))
dbt |= DT_BUFS_TYPE_LOCAL;
for (i = 0; i < num_advise; i++, ladvise++) {
start = ladvise->lla_start;
end = ladvise->lla_end;
if (end <= start) {
rc = err_serious(-EPROTO);
break;
}
/* Handle different advice types */
switch (ladvise->lla_advice) {
default:
rc = -EOPNOTSUPP;
break;
case LU_LADVISE_WILLREAD:
if (tbc == NULL)
RETURN(-ENOMEM);
ioo.ioo_oid = body->oa.o_oi;
ioo.ioo_bufcnt = 1;
rc = tgt_extent_lock(env, exp->exp_obd->obd_namespace,
&tsi->tsi_resid, start, end - 1,
&lockh, LCK_PR, &flags);
if (rc != 0)
break;
req->rq_status = ofd_ladvise_prefetch(env, fo,
tbc->local,
start, end, dbt);
tgt_data_unlock(&lockh, LCK_PR);
break;
case LU_LADVISE_DONTNEED:
rc = dt_ladvise(env, dob, ladvise->lla_start,
ladvise->lla_end, LU_LADVISE_DONTNEED);
break;
}
if (rc != 0)
break;
}
ofd_object_put(env, fo);
req->rq_status = rc;
RETURN(rc);
}
/**
* ofd_quotactl() - OFD request handler for OST_QUOTACTL RPC.
* @tsi: target session environment for this request
*
* This is part of request processing to validate incoming request fields,
* get the requested data from OSD and pack reply.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_quotactl(struct tgt_session_info *tsi)
{
struct obd_quotactl *oqctl, *repoqc;
struct lu_nodemap *nodemap;
ktime_t kstart = ktime_get();
char *buffer = NULL;
int id;
int rc;
ENTRY;
oqctl = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_QUOTACTL);
if (oqctl == NULL)
RETURN(err_serious(-EPROTO));
if (oqctl->qc_cmd == LUSTRE_Q_ITEROQUOTA)
req_capsule_set_size(tsi->tsi_pill, &RMF_OBD_QUOTA_ITER,
RCL_SERVER, LQUOTA_ITER_BUFLEN);
else
req_capsule_set_size(tsi->tsi_pill, &RMF_OBD_QUOTA_ITER,
RCL_SERVER, 0);
rc = req_capsule_server_pack(tsi->tsi_pill);
if (rc)
RETURN(err_serious(rc));
repoqc = req_capsule_server_get(tsi->tsi_pill, &RMF_OBD_QUOTACTL);
if (repoqc == NULL)
RETURN(err_serious(-ENOMEM));
if (oqctl->qc_cmd == LUSTRE_Q_ITEROQUOTA) {
buffer = req_capsule_server_get(tsi->tsi_pill,
&RMF_OBD_QUOTA_ITER);
if (buffer == NULL)
RETURN(err_serious(-ENOMEM));
}
nodemap = nodemap_get_from_exp(tsi->tsi_exp);
if (IS_ERR(nodemap))
RETURN(PTR_ERR(nodemap));
id = oqctl->qc_id;
if (oqctl->qc_type == USRQUOTA)
id = nodemap_map_id(nodemap, NODEMAP_UID,
NODEMAP_CLIENT_TO_FS, id);
else if (oqctl->qc_type == GRPQUOTA)
id = nodemap_map_id(nodemap, NODEMAP_GID,
NODEMAP_CLIENT_TO_FS, id);
else if (oqctl->qc_type == PRJQUOTA)
id = nodemap_map_id(nodemap, NODEMAP_PROJID,
NODEMAP_CLIENT_TO_FS, id);
if (oqctl->qc_cmd == LUSTRE_Q_ITEROQUOTA)
rc = lquota_iter_change_qid(nodemap, oqctl);
nodemap_putref(nodemap);
if (rc)
RETURN(rc);
if (oqctl->qc_id != id)
swap(oqctl->qc_id, id);
rc = lquotactl_slv(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, nodemap,
oqctl, buffer);
ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_QUOTACTL,
tsi->tsi_jobid, ktime_us_delta(ktime_get(), kstart));
if (oqctl->qc_id != id)
swap(oqctl->qc_id, id);
QCTL_COPY_NO_PNAME(repoqc, oqctl);
RETURN(rc);
}
/**
* ofd_prolong_extent_locks() - Prolong lock timeout for the given extent.
* @tsi: target session environment for this request
* @data: struct of data to prolong locks
*
* This function finds all locks related with incoming request and
* prolongs their timeout.
*
* If a client is holding a lock for a long time while it sends
* read or write RPCs to the OST for the object under this lock,
* then we don't want the OST to evict the client. Otherwise,
* if the network or disk is very busy then the client may not
* be able to make any progress to clear out dirty pages under
* the lock and the application will fail.
*
* Every time a Bulk Read/Write (BRW) request arrives for the object
* covered by the lock, extend the timeout on that lock. The RPC should
* contain a lock handle for the lock it is using, but this
* isn't handled correctly by all client versions, and the
* request may cover multiple locks.
*/
static void ofd_prolong_extent_locks(struct tgt_session_info *tsi,
struct ldlm_prolong_args *data)
{
struct obdo *oa = &tsi->tsi_ost_body->oa;
struct ldlm_lock *lock;
ENTRY;
data->lpa_req = tgt_ses_req(tsi);
data->lpa_export = tsi->tsi_exp;
data->lpa_resid = tsi->tsi_resid;
CDEBUG(D_RPCTRACE, "Prolong locks for req %p with x%llu ext(%llu->%llu)\n",
tgt_ses_req(tsi),
tgt_ses_req(tsi)->rq_xid, data->lpa_extent.start,
data->lpa_extent.end);
if (oa->o_valid & OBD_MD_FLHANDLE) {
/* mostly a request should be covered by only one lock, try
* fast path. */
lock = ldlm_handle2lock(&oa->o_handle);
if (lock != NULL) {
/* Fast path to check if the lock covers the whole IO
* region exclusively. */
if (ldlm_extent_contain(&lock->l_policy_data.l_extent,
&data->lpa_extent)) {
/* bingo */
LASSERT(lock->l_export == data->lpa_export);
ldlm_lock_prolong_one(lock, data);
ldlm_lock_put(lock);
if (data->lpa_locks_cnt > 0)
RETURN_EXIT;
/* The lock was destroyed probably lets try
* resource tree. */
} else {
lock->l_last_used = ktime_get();
ldlm_lock_put(lock);
}
}
}
ldlm_resource_prolong(data);
EXIT;
}
/**
* ofd_rw_hpreq_lock_match() - Implementation of
* ptlrpc_hpreq_ops::hpreq_lock_match for OFD RW
* requests.
* @req: ptlrpc_request being processed
* @lock: contended lock to match
*
* Determine if @lock and the lock from request @req are equivalent
* by comparing their resource names, modes, and extents.
*
* It is used to give priority to read and write RPCs being done
* under this lock so that the client can drop the contended
* lock more quickly and let other clients use it. This improves
* overall performance in the case where the first client gets a
* very large lock extent that prevents other clients from
* submitting their writes.
*
* Return:
* * %1 if lock is matched
* * %0 otherwise
*/
static int ofd_rw_hpreq_lock_match(struct ptlrpc_request *req,
struct ldlm_lock *lock)
{
struct niobuf_remote *rnb;
struct obd_ioobj *ioo;
enum ldlm_mode mode;
struct ldlm_extent ext;
__u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
ENTRY;
ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
LASSERT(ioo != NULL);
rnb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
LASSERT(rnb != NULL);
ext.start = rnb->rnb_offset;
rnb += ioo->ioo_bufcnt - 1;
ext.end = rnb->rnb_offset + rnb->rnb_len - 1;
LASSERT(lock->l_resource != NULL);
if (!ostid_res_name_eq(&ioo->ioo_oid, &lock->l_resource->lr_name))
RETURN(0);
/* a bulk write can only hold a reference on a PW extent lock
* or GROUP lock.
*/
mode = LCK_PW | LCK_GROUP;
if (opc == OST_READ)
/* whereas a bulk read can be protected by either a PR or PW
* extent lock */
mode |= LCK_PR;
if (!(lock->l_granted_mode & mode))
RETURN(0);
RETURN(ldlm_extent_overlap(&lock->l_policy_data.l_extent, &ext));
}
/**
* ofd_rw_hpreq_check() - Implementation of ptlrpc_hpreq_ops::hpreq_lock_check
* for OFD RW requests.
* @req: the incoming request
*
* Check for whether the given PTLRPC request (@req) is blocking
* an LDLM lock cancel. Also checks whether the request is covered by an LDLM
* lock.
*
* Return:
* * %1 if \a req is blocking an LDLM lock cancel
* * %0 if it is not
* * %-ESTALE if lock is not found
*/
static int ofd_rw_hpreq_check(struct ptlrpc_request *req)
{
struct tgt_session_info *tsi;
struct obd_ioobj *ioo;
struct niobuf_remote *rnb;
int opc;
struct ldlm_prolong_args pa = { 0 };
ENTRY;
/* Don't use tgt_ses_info() to get session info, because lock_match()
* can be called while request has no processing thread yet. */
tsi = lu_context_key_get(&req->rq_session, &tgt_session_key);
/*
* Use LASSERT below because malformed RPCs should have
* been filtered out in tgt_hpreq_handler().
*/
opc = lustre_msg_get_opc(req->rq_reqmsg);
LASSERT(opc == OST_READ || opc == OST_WRITE);
ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
LASSERT(ioo != NULL);
rnb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
LASSERT(rnb != NULL);
LASSERT(!(rnb->rnb_flags & OBD_BRW_SRVLOCK));
pa.lpa_mode = LCK_PW | LCK_GROUP;
if (opc == OST_READ)
pa.lpa_mode |= LCK_PR;
pa.lpa_extent.start = rnb->rnb_offset;
rnb += ioo->ioo_bufcnt - 1;
pa.lpa_extent.end = rnb->rnb_offset + rnb->rnb_len - 1;
DEBUG_REQ(D_RPCTRACE, req,
"%s %s: refresh rw locks for "DFID" (%llu->%llu)",
tgt_name(tsi->tsi_tgt), current->comm, PFID(&tsi->tsi_fid),
pa.lpa_extent.start, pa.lpa_extent.end);
ofd_prolong_extent_locks(tsi, &pa);
CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p\n",
tgt_name(tsi->tsi_tgt), pa.lpa_blocks_cnt, req);
if (pa.lpa_blocks_cnt > 0)
RETURN(1);
RETURN(pa.lpa_locks_cnt > 0 ? 0 : -ESTALE);
}
/**
* ofd_rw_hpreq_fini() - Implementation of ptlrpc_hpreq_ops::hpreq_lock_fini
* for OFD RW requests.
* @req: request which is being processed.
*
* Called after the request has been handled. It refreshes lock timeout again
* so that client has more time to send lock cancel RPC.
*/
static void ofd_rw_hpreq_fini(struct ptlrpc_request *req)
{
ofd_rw_hpreq_check(req);
}
/**
* ofd_punch_hpreq_lock_match() - check if the given lock is the same by its
* resname
* @req: ptlrpc_request being processed
* @lock: contended lock to match
*
* This function checks if the given lock is the same by its resname, mode
* and extent as one taken from the request.
* It is used to give priority to punch/truncate RPCs that might lead to
* the fastest release of that lock when a lock is contended.
* Implementation of ptlrpc_hpreq_ops::hpreq_lock_match for OST_PUNCH request.
*
* Return:
* * %1 if lock is matched
* * %0 otherwise
*/
static int ofd_punch_hpreq_lock_match(struct ptlrpc_request *req,
struct ldlm_lock *lock)
{
struct tgt_session_info *tsi;
struct obdo *oa;
struct ldlm_extent ext;
ENTRY;
/* Don't use tgt_ses_info() to get session info, because lock_match()
* can be called while request has no processing thread yet. */
tsi = lu_context_key_get(&req->rq_session, &tgt_session_key);
/*
* Use LASSERT below because malformed RPCs should have
* been filtered out in tgt_hpreq_handler().
*/
LASSERT(tsi->tsi_ost_body != NULL);
if (tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLHANDLE &&
tsi->tsi_ost_body->oa.o_handle.cookie == lock->l_handle.h_cookie)
RETURN(1);
oa = &tsi->tsi_ost_body->oa;
ext.start = oa->o_size;
ext.end = oa->o_blocks;
LASSERT(lock->l_resource != NULL);
if (!ostid_res_name_eq(&oa->o_oi, &lock->l_resource->lr_name))
RETURN(0);
if (!(lock->l_granted_mode & (LCK_PW | LCK_GROUP)))
RETURN(0);
RETURN(ldlm_extent_overlap(&lock->l_policy_data.l_extent, &ext));
}
/**
* ofd_punch_hpreq_check() - Implementation of hpreq_lock_check for OST_PUNCH
* request
* @req: the incoming request
*
* High-priority queue request check for whether the given punch request
* (@req) is blocking an LDLM lock cancel. Also checks whether the request is
* covered by an LDLM lock.
*
* Return:
* * %1 if @req is blocking an LDLM lock cancel
* * %0 if it is not
* * %-ESTALE if lock is not found
*/
static int ofd_punch_hpreq_check(struct ptlrpc_request *req)
{
struct tgt_session_info *tsi;
struct obdo *oa;
struct ldlm_prolong_args pa = { 0 };
ENTRY;
/* Don't use tgt_ses_info() to get session info, because lock_match()
* can be called while request has no processing thread yet. */
tsi = lu_context_key_get(&req->rq_session, &tgt_session_key);
LASSERT(tsi != NULL);
oa = &tsi->tsi_ost_body->oa;
LASSERT(!(oa->o_valid & OBD_MD_FLFLAGS &&
oa->o_flags & OBD_FL_SRVLOCK));
pa.lpa_mode = LCK_PW | LCK_GROUP;
pa.lpa_extent.start = oa->o_size;
pa.lpa_extent.end = oa->o_blocks;
CDEBUG(D_DLMTRACE,
"%s: refresh locks: %llu/%llu (%llu->%llu)\n",
tgt_name(tsi->tsi_tgt), tsi->tsi_resid.name[0],
tsi->tsi_resid.name[1], pa.lpa_extent.start, pa.lpa_extent.end);
ofd_prolong_extent_locks(tsi, &pa);
CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
tgt_name(tsi->tsi_tgt), pa.lpa_blocks_cnt, req);
if (pa.lpa_blocks_cnt > 0)
RETURN(1);
RETURN(pa.lpa_locks_cnt > 0 ? 0 : -ESTALE);
}
/**
* ofd_punch_hpreq_fini() - Called after the request has been handled.
* @req: request which is being processed.
*
* Called after the request has been handled. It refreshes lock timeout again
* so that client has more time to send lock cancel RPC.
* Implementation of ptlrpc_hpreq_ops::hpreq_lock_fini for OST_PUNCH request.
*/
static void ofd_punch_hpreq_fini(struct ptlrpc_request *req)
{
ofd_punch_hpreq_check(req);
}
static struct ptlrpc_hpreq_ops ofd_hpreq_rw = {
.hpreq_lock_match = ofd_rw_hpreq_lock_match,
.hpreq_check = ofd_rw_hpreq_check,
.hpreq_fini = ofd_rw_hpreq_fini
};
static struct ptlrpc_hpreq_ops ofd_hpreq_punch = {
.hpreq_lock_match = ofd_punch_hpreq_lock_match,
.hpreq_check = ofd_punch_hpreq_check,
.hpreq_fini = ofd_punch_hpreq_fini
};
/**
* ofd_hp_brw() - Assign high priority operations to an IO request.
* @tsi: target session environment for this request
*
* Check if the incoming request is a candidate for
* high-priority processing. If it is, assign it a high
* priority operations table.
*/
static void ofd_hp_brw(struct tgt_session_info *tsi)
{
struct niobuf_remote *rnb;
struct obd_ioobj *ioo;
ENTRY;
ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
LASSERT(ioo != NULL); /* must exist after request preprocessing */
if (ioo->ioo_bufcnt > 0) {
rnb = req_capsule_client_get(tsi->tsi_pill, &RMF_NIOBUF_REMOTE);
LASSERT(rnb != NULL); /* must exist after request preprocessing */
/* no high priority if server lock is needed */
if (rnb->rnb_flags & OBD_BRW_SRVLOCK ||
(lustre_msg_get_flags(tgt_ses_req(tsi)->rq_reqmsg)
& MSG_REPLAY))
return;
}
tgt_ses_req(tsi)->rq_ops = &ofd_hpreq_rw;
}
/**
* ofd_hp_punch() - Assign high priority operations to an punch request.
* @tsi: target session environment for this request
*
* Check if the incoming request is a candidate for
* high-priority processing. If it is, assign it a high
* priority operations table.
*/
static void ofd_hp_punch(struct tgt_session_info *tsi)
{
LASSERT(tsi->tsi_ost_body != NULL); /* must exists if we are here */
/* no high-priority if server lock is needed */
if ((tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLFLAGS &&
tsi->tsi_ost_body->oa.o_flags & OBD_FL_SRVLOCK) ||
tgt_conn_flags(tsi) & OBD_CONNECT_MDS ||
lustre_msg_get_flags(tgt_ses_req(tsi)->rq_reqmsg) & MSG_REPLAY)
return;
tgt_ses_req(tsi)->rq_ops = &ofd_hpreq_punch;
}
#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
/*
* Table of OFD-specific request handlers
*
* This table contains all opcodes accepted by OFD and
* specifies handlers for them. The tgt_request_handler()
* uses such table from each target to process incoming
* requests.
*/
static struct tgt_handler ofd_tgt_handlers[] = {
TGT_RPC_HANDLER(OST_FIRST_OPC,
0, OST_CONNECT, tgt_connect,
&RQF_CONNECT, LUSTRE_OBD_VERSION),
TGT_RPC_HANDLER(OST_FIRST_OPC,
0, OST_DISCONNECT, tgt_disconnect,
&RQF_OST_DISCONNECT, LUSTRE_OBD_VERSION),
TGT_RPC_HANDLER(OST_FIRST_OPC,
0, OST_SET_INFO, ofd_set_info_hdl,
&RQF_OBD_SET_INFO, LUSTRE_OST_VERSION),
TGT_OST_HDL(0, OST_GET_INFO, ofd_get_info_hdl),
TGT_OST_HDL(HAS_BODY | HAS_REPLY, OST_GETATTR, ofd_getattr_hdl),
TGT_OST_HDL(HAS_BODY | HAS_REPLY | IS_MUTABLE,
OST_SETATTR, ofd_setattr_hdl),
TGT_OST_HDL(HAS_REPLY | IS_MUTABLE,
OST_CREATE, ofd_create_hdl),
TGT_OST_HDL(HAS_REPLY | IS_MUTABLE,
OST_DESTROY, ofd_destroy_hdl),
TGT_OST_HDL(HAS_REPLY, OST_STATFS, ofd_statfs_hdl),
TGT_OST_HDL_HP(HAS_BODY | HAS_REPLY, OST_BRW_READ, tgt_brw_read,
ofd_hp_brw),
/* don't set CORPUS flag for brw_write because -ENOENT may be valid case */
TGT_OST_HDL_HP(HAS_BODY | IS_MUTABLE, OST_BRW_WRITE, tgt_brw_write,
ofd_hp_brw),
TGT_OST_HDL_HP(HAS_BODY | HAS_REPLY | IS_MUTABLE,
OST_PUNCH, ofd_punch_hdl,
ofd_hp_punch),
TGT_OST_HDL(HAS_BODY | HAS_REPLY, OST_SYNC, ofd_sync_hdl),
TGT_OST_HDL(0, OST_QUOTACTL, ofd_quotactl),
TGT_OST_HDL(HAS_BODY | HAS_REPLY, OST_LADVISE, ofd_ladvise_hdl),
TGT_OST_HDL(HAS_BODY | HAS_REPLY | IS_MUTABLE, OST_FALLOCATE, ofd_fallocate_hdl),
TGT_OST_HDL(HAS_BODY | HAS_REPLY, OST_SEEK, tgt_lseek),
};
static struct tgt_opc_slice ofd_common_slice[] = {
{
.tos_opc_start = OST_FIRST_OPC,
.tos_opc_end = OST_LAST_OPC,
.tos_hs = ofd_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 = OUT_UPDATE_FIRST_OPC,
.tos_opc_end = OUT_UPDATE_LAST_OPC,
.tos_hs = tgt_out_handlers
},
{
.tos_opc_start = SEQ_FIRST_OPC,
.tos_opc_end = SEQ_LAST_OPC,
.tos_hs = seq_handlers
},
{
.tos_opc_start = LFSCK_FIRST_OPC,
.tos_opc_end = LFSCK_LAST_OPC,
.tos_hs = tgt_lfsck_handlers
},
{
.tos_opc_start = SEC_FIRST_OPC,
.tos_opc_end = SEC_LAST_OPC,
.tos_hs = tgt_sec_ctx_handlers
},
{
.tos_hs = NULL
}
};
/* context key constructor/destructor: ofd_key_init(), ofd_key_fini() */
LU_KEY_INIT_FINI(ofd, struct ofd_thread_info);
/**
* ofd_key_exit() - Optional method called on lu_context_exit()
* @ctx: execution context
* @key: context key
* @data: ofd_thread_info
*
* Optional method called on lu_context_exit() for all allocated
* keys. It is used in OFD to sanitize context values which may be re-used
* during another request processing by the same thread.
* Implementation of lu_context_key::lct_key_exit.
*/
static void ofd_key_exit(const struct lu_context *ctx,
struct lu_context_key *key, void *data)
{
struct ofd_thread_info *info = data;
info->fti_env = NULL;
info->fti_exp = NULL;
info->fti_xid = 0;
info->fti_pre_version = 0;
memset(&info->fti_attr, 0, sizeof(info->fti_attr));
}
struct lu_context_key ofd_thread_key = {
.lct_tags = LCT_DT_THREAD,
.lct_init = ofd_key_init,
.lct_fini = ofd_key_fini,
.lct_exit = ofd_key_exit
};
/**
* ofd_init0() - main starting point of OFD initialization.
* @env: execution environment
* @m: OFD device
* @ldt: LU device type of OFD
* @cfg: configuration log
*
* This is the main starting point of OFD initialization. It fills all OFD
* parameters with their initial values and calls other initializing functions
* to set up all OFD subsystems.
* Initialize OFD device according to parameters in the config log \a cfg.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_init0(const struct lu_env *env, struct ofd_device *m,
struct lu_device_type *ldt, struct lustre_cfg *cfg)
{
const char *dev = lustre_cfg_string(cfg, 0);
struct ofd_thread_info *info = NULL;
struct obd_device *obd;
struct tg_grants_data *tgd = &m->ofd_lut.lut_tgd;
DECLARE_BITMAP(lmd_flags, LMD_FLG_NUM_FLAGS);
struct lu_fid fid;
struct nm_config_file *nodemap_config;
struct obd_device_target *obt;
int rc;
ENTRY;
obd = class_name2obd(dev);
if (!obd) {
CERROR("Cannot find obd with name %s\n", dev);
RETURN(-ENODEV);
}
rc = lu_env_refill((struct lu_env *)env);
if (rc)
RETURN(rc);
obt = obd_obt_init(obd);
spin_lock_init(&m->ofd_flags_lock);
m->ofd_raid_degraded = 0;
m->ofd_sync_journal = 0;
ofd_slc_set(m);
m->ofd_soft_sync_limit = OFD_SOFT_SYNC_LIMIT_DEFAULT;
m->ofd_seq_count = 0;
INIT_LIST_HEAD(&m->ofd_inconsistency_list);
spin_lock_init(&m->ofd_inconsistency_lock);
m->ofd_access_log_mask = -1; /* Log all accesses if enabled. */
spin_lock_init(&m->ofd_batch_lock);
init_rwsem(&m->ofd_lastid_rwsem);
m->ofd_dt_dev.dd_lu_dev.ld_ops = &ofd_lu_ops;
m->ofd_dt_dev.dd_lu_dev.ld_obd = obd;
/* set this lu_device to obd, because error handling need it */
obd->obd_lu_dev = &m->ofd_dt_dev.dd_lu_dev;
m->ofd_enable_resource_id_repair = 1;
m->ofd_id_repair_queue_count =
OFD_ID_REPAIR_QUEUE_COUNT_DEFAULT;
INIT_LIST_HEAD(&m->ofd_id_repair_list);
spin_lock_init(&m->ofd_id_repair_lock);
init_waitqueue_head(&m->ofd_id_repair_waitq);
atomic_set(&m->ofd_id_repair_queued, 0);
/* No connection accepted until configurations will finish */
spin_lock(&obd->obd_dev_lock);
obd->obd_no_conn = 1;
spin_unlock(&obd->obd_dev_lock);
set_bit(OBDF_REPLAYABLE, obd->obd_flags);
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", obd->obd_name);
clear_bit(OBDF_REPLAYABLE, obd->obd_flags);
}
}
info = ofd_info_init(env, NULL);
if (!info)
RETURN(-EFAULT);
rc = ofd_stack_init(env, m, cfg, lmd_flags);
if (rc) {
CERROR("%s: can't init device stack, rc %d\n",
obd->obd_name, rc);
RETURN(rc);
}
snprintf(info->fti_u.name, sizeof(info->fti_u.name), "%s-%s",
"filter"/*LUSTRE_OST_NAME*/, obd->obd_uuid.uuid);
m->ofd_namespace = ldlm_namespace_new(obd, info->fti_u.name,
LDLM_NAMESPACE_SERVER,
LDLM_NAMESPACE_GREEDY,
LDLM_NS_TYPE_OST);
if (IS_ERR(m->ofd_namespace)) {
rc = PTR_ERR(m->ofd_namespace);
CERROR("%s: unable to create server namespace: rc = %d\n",
obd->obd_name, rc);
m->ofd_namespace = NULL;
GOTO(err_fini_stack, rc);
}
/* set obd_namespace for compatibility with old code */
obd->obd_namespace = m->ofd_namespace;
ldlm_register_intent(m->ofd_namespace, ofd_intent_policy);
m->ofd_namespace->ns_lvbo = &ofd_lvbo;
m->ofd_namespace->ns_lvbp = m;
ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
"filter_ldlm_cb_client", &obd->obd_ldlm_client);
rc = tgt_init(env, &m->ofd_lut, obd, m->ofd_osd, ofd_common_slice,
OBD_FAIL_OST_ALL_REQUEST_NET,
OBD_FAIL_OST_ALL_REPLY_NET);
if (rc)
GOTO(err_free_ns, rc);
if (test_bit(LMD_FLG_SKIP_LFSCK, lmd_flags))
m->ofd_skip_lfsck = 1;
if (test_bit(LMD_FLG_LOCAL_RECOV, lmd_flags))
m->ofd_lut.lut_local_recovery = 1;
tgd->tgd_reserved_pcnt = 0;
m->ofd_brw_size = m->ofd_lut.lut_dt_conf.ddp_brw_size;
m->ofd_precreate_batch = OFD_PRECREATE_BATCH_DEFAULT;
if (tgd->tgd_osfs.os_bsize * tgd->tgd_osfs.os_blocks <
OFD_PRECREATE_SMALL_FS)
m->ofd_precreate_batch = OFD_PRECREATE_BATCH_SMALL;
m->ofd_atime_diff = OFD_DEF_ATIME_DIFF;
rc = ofd_fs_setup(env, m, obd);
if (rc)
GOTO(err_fini_lut, rc);
fid.f_seq = FID_SEQ_LOCAL_NAME;
fid.f_oid = 1;
fid.f_ver = 0;
rc = local_oid_storage_init(env, m->ofd_osd, &fid,
&m->ofd_los);
if (rc)
GOTO(err_fini_fs, rc);
nodemap_config = nm_config_file_register_tgt(env, m->ofd_osd,
m->ofd_los);
if (IS_ERR(nodemap_config)) {
rc = PTR_ERR(nodemap_config);
if (rc != -EROFS)
GOTO(err_fini_los, rc);
} else {
obt->obt_nodemap_config_file = nodemap_config;
}
rc = ofd_start_inconsistency_verification_thread(m);
if (rc)
GOTO(err_fini_nm, rc);
rc = ofd_id_repair_start_thread(m);
if (rc)
GOTO(err_stop_inconsistency, rc);
rc = ofd_tunables_init(m);
if (rc)
GOTO(err_stop_repair, rc);
tgt_adapt_sptlrpc_conf(&m->ofd_lut);
RETURN(0);
err_stop_repair:
ofd_id_repair_stop_thread(m);
err_stop_inconsistency:
ofd_stop_inconsistency_verification_thread(m);
err_fini_nm:
nm_config_file_deregister_tgt(env, obt->obt_nodemap_config_file);
obt->obt_nodemap_config_file = NULL;
err_fini_los:
local_oid_storage_fini(env, m->ofd_los);
m->ofd_los = NULL;
err_fini_fs:
ofd_fs_cleanup(env, m);
err_fini_lut:
tgt_fini(env, &m->ofd_lut);
err_free_ns:
ldlm_namespace_free(m->ofd_namespace, NULL,
test_bit(OBDF_FORCE, obd->obd_flags));
obd->obd_namespace = m->ofd_namespace = NULL;
err_fini_stack:
ofd_stack_fini(env, m, &m->ofd_osd->dd_lu_dev);
return rc;
}
/**
* ofd_fini() - Stop the OFD device
* @env: execution environment
* @m: OFD device
*
* This function stops the OFD device and all its subsystems.
* This is the end of OFD lifecycle.
*/
static void ofd_fini(const struct lu_env *env, struct ofd_device *m)
{
struct obd_device *obd = ofd_obd(m);
struct lu_device *d = &m->ofd_dt_dev.dd_lu_dev;
struct lfsck_stop stop;
stop.ls_status = LS_PAUSED;
stop.ls_flags = 0;
lfsck_stop(env, m->ofd_osd, &stop);
ofd_stack_pre_fini(env, m, &m->ofd_dt_dev.dd_lu_dev);
target_recovery_fini(obd);
if (m->ofd_namespace != NULL)
ldlm_namespace_free_prior(m->ofd_namespace, NULL,
test_bit(OBDF_FORCE, d->ld_obd->obd_flags));
obd_exports_barrier(obd);
obd_zombie_barrier();
ofd_procfs_fini(m);
tgt_fini(env, &m->ofd_lut);
ofd_id_repair_stop_thread(m);
ofd_stop_inconsistency_verification_thread(m);
lfsck_degister(env, m->ofd_osd);
ofd_fs_cleanup(env, m);
nm_config_file_deregister_tgt(env,
obd2obt(obd)->obt_nodemap_config_file);
obd2obt(obd)->obt_nodemap_config_file = NULL;
if (m->ofd_namespace != NULL) {
ldlm_namespace_free_post(m->ofd_namespace);
d->ld_obd->obd_namespace = m->ofd_namespace = NULL;
}
ofd_access_log_delete(m->ofd_access_log);
m->ofd_access_log = NULL;
ofd_stack_fini(env, m, &m->ofd_dt_dev.dd_lu_dev);
LASSERT(atomic_read(&d->ld_ref) == 0);
server_put_mount(obd->obd_name, true);
EXIT;
}
/**
* ofd_device_fini() - Finalize device
* @env: execution environment
* @d: LU device of OFD
*
* Finalize device. Dual to ofd_device_init(). It is called from
* obd_precleanup() and stops the current device.
* Implementation of lu_device_type_operations::ldto_device_fini.
*
* Returns always %NULL
*/
static struct lu_device *ofd_device_fini(const struct lu_env *env,
struct lu_device *d)
{
ENTRY;
ofd_fini(env, ofd_dev(d));
target_cleanup_recovery(d->ld_obd);
RETURN(NULL);
}
/**
* ofd_device_free() - Free OFD device
* @env: execution environment
* @d: LU device of OFD
*
* Free OFD device. Dual to ofd_device_alloc().
* Implementation of lu_device_type_operations::ldto_device_free.
*
* Returns always %NULL
*/
static struct lu_device *ofd_device_free(const struct lu_env *env,
struct lu_device *d)
{
struct ofd_device *m = ofd_dev(d);
dt_device_fini(&m->ofd_dt_dev);
OBD_FREE_PTR(m);
RETURN(NULL);
}
/**
* ofd_device_alloc() - allocates the new OFD device.
* @env: execution environment
* @t: lu_device_type of OFD device
* @cfg: configuration log
*
* This function allocates the new OFD device. It is called from
* obd_setup() if OBD device had lu_device_type defined.
* Implementation of lu_device_type_operations::ldto_device_alloc.
*
* Return:
* * %pointer to the lu_device of just allocated OFD
* * %ERR_PTR of return value on error
*/
static struct lu_device *ofd_device_alloc(const struct lu_env *env,
struct lu_device_type *t,
struct lustre_cfg *cfg)
{
struct ofd_device *m;
struct lu_device *l;
int rc;
OBD_ALLOC_PTR(m);
if (m == NULL)
return ERR_PTR(-ENOMEM);
l = &m->ofd_dt_dev.dd_lu_dev;
dt_device_init(&m->ofd_dt_dev, t);
rc = ofd_init0(env, m, t, cfg);
if (rc != 0) {
ofd_device_free(env, l);
l = ERR_PTR(rc);
}
return l;
}
/* type constructor/destructor: ofd_type_init(), ofd_type_fini() */
LU_TYPE_INIT_FINI(ofd, &ofd_thread_key);
static const struct lu_device_type_operations ofd_device_type_ops = {
.ldto_init = ofd_type_init,
.ldto_fini = ofd_type_fini,
.ldto_start = ofd_type_start,
.ldto_stop = ofd_type_stop,
.ldto_device_alloc = ofd_device_alloc,
.ldto_device_free = ofd_device_free,
.ldto_device_fini = ofd_device_fini
};
static struct lu_device_type ofd_device_type = {
.ldt_tags = LU_DEVICE_DT,
.ldt_name = LUSTRE_OST_NAME,
.ldt_ops = &ofd_device_type_ops,
.ldt_ctx_tags = LCT_DT_THREAD
};
/**
* ofd_init() - Initialize OFD module.
*
* This function is called upon module loading. It registers OFD device type
* and prepares all in-memory structures used by all OFD devices.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int __init ofd_init(void)
{
int rc;
rc = libcfs_setup();
if (rc)
return rc;
rc = lu_kmem_init(ofd_caches);
if (rc)
return rc;
rc = oss_mod_init();
if (rc)
goto out_caches;
rc = ofd_access_log_module_init();
if (rc)
goto out_oss_fini;
rc = class_register_type(&ofd_obd_ops, NULL, true,
LUSTRE_OST_NAME, &ofd_device_type);
if (rc)
goto out_ofd_access_log;
return 0;
out_ofd_access_log:
ofd_access_log_module_exit();
out_oss_fini:
oss_mod_exit();
out_caches:
lu_kmem_fini(ofd_caches);
return rc;
}
/*
* Stop OFD module.
*
* This function is called upon OFD module unloading.
* It frees all related structures and unregisters OFD device type.
*/
static void __exit ofd_exit(void)
{
class_unregister_type(LUSTRE_OST_NAME);
ofd_access_log_module_exit();
oss_mod_exit();
lu_kmem_fini(ofd_caches);
}
MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
MODULE_DESCRIPTION("Lustre Object Filtering Device");
MODULE_VERSION(LUSTRE_VERSION_STRING);
MODULE_LICENSE("GPL");
late_initcall_sync(ofd_init);
module_exit(ofd_exit);
