Viewing: osd_oi.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/
*
* OI functions to map fid to dnode
*
* Author: Alex Zhuravlev <bzzz@whamcloud.com>
* Author: Mike Pershin <tappro@whamcloud.com>
* Author: Di Wang <di.wang@intel.com>
*/
#define DEBUG_SUBSYSTEM S_OSD
#include <obd_support.h>
#include <lustre_net.h>
#include <obd.h>
#include <obd_class.h>
#include <lustre_disk.h>
#include <lustre_fid.h>
#include "osd_internal.h"
#include <sys/dnode.h>
#include <sys/dbuf.h>
#include <sys/spa.h>
#include <sys/stat.h>
#include <sys/zap.h>
#include <sys/spa_impl.h>
#include <sys/zfs_znode.h>
#include <sys/dmu_tx.h>
#include <sys/dmu_objset.h>
#include <sys/dsl_prop.h>
#include <sys/sa_impl.h>
#include <sys/txg.h>
#include <lustre_scrub.h>
#define OSD_OI_FID_NR (1UL << 7)
unsigned int osd_oi_count = OSD_OI_FID_NR;
/*
* zfs osd maintains names for known fids in the name hierarchy
* so that one can mount filesystem with regular ZFS stack and
* access files
*/
struct named_oid {
unsigned long oid;
char *name;
};
static const struct named_oid oids[] = {
{ .oid = LAST_RECV_OID, .name = LAST_RCVD },
{ .oid = OFD_LAST_GROUP_OID, .name = "LAST_GROUP" },
{ .oid = LLOG_CATALOGS_OID, .name = "CATALOGS" },
{ .oid = MGS_CONFIGS_OID, /*MOUNT_CONFIGS_DIR*/ },
{ .oid = FID_SEQ_SRV_OID, .name = "seq_srv" },
{ .oid = FID_SEQ_CTL_OID, .name = "seq_ctl" },
{ .oid = FLD_INDEX_OID, .name = "fld" },
{ .oid = MDD_LOV_OBJ_OID, .name = LOV_OBJID },
{ .oid = OFD_HEALTH_CHECK_OID, .name = HEALTH_CHECK },
{ .oid = REPLY_DATA_OID, .name = REPLY_DATA },
{ .oid = MDD_LOV_OBJ_OSEQ, .name = LOV_OBJSEQ },
{ .oid = BATCHID_COMMITTED_OID, .name = "BATCHID" },
{ .oid = 0 }
};
static inline bool fid_is_objseq(const struct lu_fid *fid)
{
return fid->f_seq == FID_SEQ_LOCAL_FILE &&
fid->f_oid == MDD_LOV_OBJ_OSEQ;
}
static inline bool fid_is_batchid(const struct lu_fid *fid)
{
return fid->f_seq == FID_SEQ_LOCAL_FILE &&
fid->f_oid == BATCHID_COMMITTED_OID;
}
static char *oid2name(const unsigned long oid)
{
int i = 0;
while (oids[i].oid) {
if (oids[i].oid == oid)
return oids[i].name;
i++;
}
return NULL;
}
/**
* osd_oi_lookup() - Lookup an existing OI by the given name.
* @env: Lustre environment
* @o: OSD device
* @parent: Parent directory
* @name: Lookup an existing OI by the given name
* @oi: OI populated after lookup [out]
*
* Return:
* * %0 on success
* * %negative on failure
*/
static int
osd_oi_lookup(const struct lu_env *env, struct osd_device *o,
uint64_t parent, const char *name, struct osd_oi *oi)
{
struct zpl_direntry *zde = &osd_oti_get(env)->oti_zde.lzd_reg;
int rc;
rc = -zap_lookup(o->od_os, parent, name, 8, 1, (void *)zde);
if (rc)
return rc;
rc = strscpy(oi->oi_name, name, sizeof(oi->oi_name));
if (rc < 0)
return rc;
oi->oi_zapid = zde->zde_dnode;
return 0;
}
static int osd_obj_create(const struct lu_env *env, struct osd_device *o,
uint64_t parent, const char *name, uint64_t *child,
const struct lu_fid *fid, bool isdir)
{
struct osd_thread_info *info = osd_oti_get(env);
struct zpl_direntry *zde = &info->oti_zde.lzd_reg;
struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
struct lu_attr *la = &info->oti_la;
sa_handle_t *sa_hdl = NULL;
nvlist_t *nvbuf = NULL;
dmu_tx_t *tx;
uint64_t oid;
__u32 compat = LMAC_NOT_IN_OI;
int rc;
ENTRY;
if (o->od_dt_dev.dd_rdonly)
RETURN(-EROFS);
memset(la, 0, sizeof(*la));
la->la_valid = LA_MODE | LA_UID | LA_GID;
la->la_mode = S_IRUGO | S_IWUSR | (isdir ? S_IXUGO | S_IFDIR : S_IFREG);
if (fid) {
rc = -nvlist_alloc(&nvbuf, NV_UNIQUE_NAME, KM_SLEEP);
if (rc)
RETURN(rc);
if (o->od_is_ost)
compat |= LMAC_FID_ON_OST;
lustre_lma_init(lma, fid, compat, 0);
lustre_lma_swab(lma);
rc = -nvlist_add_byte_array(nvbuf, XATTR_NAME_LMA,
(uchar_t *)lma, sizeof(*lma));
if (rc)
GOTO(out, rc);
}
/* create fid-to-dnode index */
tx = dmu_tx_create(o->od_os);
if (!tx)
GOTO(out, rc = -ENOMEM);
dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL);
dmu_tx_hold_bonus(tx, parent);
dmu_tx_hold_zap(tx, parent, TRUE, name);
dmu_tx_hold_sa_create(tx, ZFS_SA_BASE_ATTR_SIZE);
rc = -dmu_tx_assign(tx, DMU_TX_WAIT);
if (rc) {
dmu_tx_abort(tx);
GOTO(out, rc);
}
if (isdir)
oid = osd_zap_create_flags(o->od_os, 0, ZAP_FLAG_HASH64,
DMU_OT_DIRECTORY_CONTENTS,
o->od_fzap_blockshift,
DN_MAX_INDBLKSHIFT,
0, tx);
else
oid = osd_dmu_object_alloc(o->od_os, DMU_OTN_UINT8_METADATA,
0, 0, tx);
rc = -sa_handle_get(o->od_os, oid, NULL, SA_HDL_PRIVATE, &sa_hdl);
if (rc)
GOTO(commit, rc);
rc = __osd_attr_init(env, o, NULL, sa_hdl, tx, la, parent, nvbuf);
sa_handle_destroy(sa_hdl);
if (rc)
GOTO(commit, rc);
zde->zde_dnode = oid;
zde->zde_pad = 0;
zde->zde_type = S_DT(isdir ? S_IFDIR : S_IFREG);
rc = -zap_add(o->od_os, parent, name, 8, 1, (void *)zde, tx);
GOTO(commit, rc);
commit:
if (rc)
dmu_object_free(o->od_os, oid, tx);
else
*child = oid;
dmu_tx_commit(tx);
out:
if (nvbuf)
nvlist_free(nvbuf);
return rc;
}
static int osd_oi_destroy(const struct lu_env *env, struct osd_device *o,
const char *name)
{
struct osd_oi oi;
dmu_tx_t *tx;
dnode_t *rootdn;
uint64_t oid;
int rc;
ENTRY;
if (o->od_dt_dev.dd_rdonly)
RETURN(-EROFS);
rc = osd_oi_lookup(env, o, o->od_rootid, name, &oi);
if (rc == -ENOENT)
RETURN(0);
if (rc)
RETURN(rc);
oid = oi.oi_zapid;
rc = __osd_obj2dnode(o->od_os, o->od_rootid, &rootdn);
if (rc)
RETURN(rc);
tx = dmu_tx_create(o->od_os);
dmu_tx_mark_netfree(tx);
dmu_tx_hold_free(tx, oid, 0, DMU_OBJECT_END);
osd_tx_hold_zap(tx, oid, rootdn, FALSE, NULL);
rc = -dmu_tx_assign(tx, DMU_TX_WAIT);
if (rc) {
dmu_tx_abort(tx);
GOTO(out, rc);
}
rc = -dmu_object_free(o->od_os, oid, tx);
if (rc) {
CERROR("%s: failed to free %s %llu: rc = %d\n",
o->od_svname, name, oid, rc);
GOTO(commit, rc);
}
rc = osd_zap_remove(o, o->od_rootid, rootdn, name, tx);
if (rc) {
CERROR("%s: zap_remove %s failed: rc = %d\n",
o->od_svname, name, rc);
GOTO(commit, rc);
}
EXIT;
commit:
dmu_tx_commit(tx);
out:
osd_dnode_rele(rootdn);
return rc;
}
static int
osd_oi_find_or_create(const struct lu_env *env, struct osd_device *o,
uint64_t parent, const char *name, uint64_t *child)
{
struct osd_oi oi;
int rc;
rc = osd_oi_lookup(env, o, parent, name, &oi);
if (rc == 0)
*child = oi.oi_zapid;
else if (rc == -ENOENT)
rc = osd_obj_create(env, o, parent, name, child, NULL, true);
return rc;
}
int osd_obj_find_or_create(const struct lu_env *env, struct osd_device *o,
uint64_t parent, const char *name, uint64_t *child,
const struct lu_fid *fid, bool isdir)
{
struct osd_oi oi;
int rc;
rc = osd_oi_lookup(env, o, parent, name, &oi);
if (!rc)
*child = oi.oi_zapid;
else if (rc == -ENOENT)
rc = osd_obj_create(env, o, parent, name, child, fid, isdir);
return rc;
}
/**
* osd_fld_lookup() - Lookup the target index/flags of the fid
* @env: Lustre environment
* @osd: OSD device
* @seq: Sequence to look up
* @range: Lookup result [out]
*
* Lookup the target index/flags of the fid, so it will know where
* the object is located (tgt index) and it is MDT or OST object.
*
* Return:
* * %0 on success
* * %negative on failure
*/
int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
u64 seq, struct lu_seq_range *range)
{
struct seq_server_site *ss = osd_seq_site(osd);
/* Initialize range flags to avoid any garbage */
range->lsr_flags = 0;
if (fid_seq_is_idif(seq)) {
fld_range_set_ost(range);
range->lsr_index = idif_ost_idx(seq);
return 0;
}
if (!fid_seq_in_fldb(seq)) {
fld_range_set_mdt(range);
if (ss != NULL)
/* FIXME: If ss is NULL, it suppose not get lsr_index
* at all
*/
range->lsr_index = ss->ss_node_id;
return 0;
}
/* The seq_server_site may be NOT ready during initial OI scrub */
if (unlikely(!ss || !ss->ss_server_fld ||
!ss->ss_server_fld->lsf_cache))
return -ENOENT;
fld_range_set_any(range);
/* OSD will only do local fld lookup */
return fld_local_lookup(env, ss->ss_server_fld, seq, range);
}
int fid_is_on_ost(const struct lu_env *env, struct osd_device *osd,
const struct lu_fid *fid)
{
struct lu_seq_range *range = &osd_oti_get(env)->oti_seq_range;
int rc;
ENTRY;
if (fid_is_idif(fid))
RETURN(1);
if (unlikely(fid_is_local_file(fid) || fid_is_llog(fid)) ||
fid_is_name_llog(fid) || fid_is_quota(fid) ||
fid_is_igif(fid))
RETURN(0);
rc = osd_fld_lookup(env, osd, fid_seq(fid), range);
if (rc != 0) {
/* During upgrade, OST FLDB might not be loaded because
* OST FLDB is not created until 2.6, so if some DNE
* filesystem upgrade from 2.5 to 2.7/2.8, they will
* not be able to find the sequence from local FLDB
* cache see fld_index_init().
*/
if (rc == -ENOENT && osd->od_is_ost)
RETURN(1);
if (rc != -ENOENT)
CERROR("%s: "DFID" lookup failed: rc = %d\n",
osd_name(osd), PFID(fid), rc);
RETURN(0);
}
if (fld_range_is_ost(range))
RETURN(1);
RETURN(0);
}
static struct osd_seq *osd_seq_find_locked(struct osd_seq_list *seq_list,
u64 seq)
{
struct osd_seq *osd_seq;
list_for_each_entry(osd_seq, &seq_list->osl_seq_list, os_seq_list) {
if (osd_seq->os_seq == seq)
return osd_seq;
}
return NULL;
}
static struct osd_seq *osd_seq_find(struct osd_seq_list *seq_list, u64 seq)
{
struct osd_seq *osd_seq;
read_lock(&seq_list->osl_seq_list_lock);
osd_seq = osd_seq_find_locked(seq_list, seq);
read_unlock(&seq_list->osl_seq_list_lock);
return osd_seq;
}
static struct osd_seq *osd_find_or_add_seq(const struct lu_env *env,
struct osd_device *osd, u64 seq)
{
struct osd_seq_list *seq_list = &osd->od_seq_list;
struct osd_seq *osd_seq;
char *key = osd_oti_get(env)->oti_buf;
char *seq_name = osd_oti_get(env)->oti_str;
struct osd_oi oi;
uint64_t sdb, odb;
int i;
int rc = 0;
ENTRY;
osd_seq = osd_seq_find(seq_list, seq);
if (osd_seq != NULL)
RETURN(osd_seq);
down(&seq_list->osl_seq_init_sem);
/* Check again, in case some one else already add it to the list */
osd_seq = osd_seq_find(seq_list, seq);
if (osd_seq != NULL)
GOTO(out, rc = 0);
OBD_ALLOC_PTR(osd_seq);
if (osd_seq == NULL)
GOTO(out, rc = -ENOMEM);
INIT_LIST_HEAD(&osd_seq->os_seq_list);
osd_seq->os_seq = seq;
/* Init subdir count to be 32, but each seq can have different subdir
* count
*/
osd_seq->os_subdir_count = OSD_OST_MAP_SIZE;
OBD_ALLOC_PTR_ARRAY(osd_seq->os_compat_dirs, osd_seq->os_subdir_count);
if (osd_seq->os_compat_dirs == NULL)
GOTO(out, rc = -ENOMEM);
oi.oi_zapid = osd->od_O_id;
sprintf(seq_name, (fid_seq_is_rsvd(seq) ||
fid_seq_is_mdt0(seq)) ? "%llu" : "%llx",
fid_seq_is_idif(seq) ? 0 : seq);
rc = osd_oi_find_or_create(env, osd, oi.oi_zapid, seq_name, &odb);
if (rc != 0) {
CERROR("%s: Can not create %s : rc = %d\n",
osd_name(osd), seq_name, rc);
GOTO(out, rc);
}
osd_seq->os_oid = odb;
for (i = 0; i < OSD_OST_MAP_SIZE; i++) {
sprintf(key, "d%d", i);
rc = osd_oi_find_or_create(env, osd, odb, key, &sdb);
if (rc)
GOTO(out, rc);
osd_seq->os_compat_dirs[i] = sdb;
}
write_lock(&seq_list->osl_seq_list_lock);
list_add(&osd_seq->os_seq_list, &seq_list->osl_seq_list);
write_unlock(&seq_list->osl_seq_list_lock);
out:
up(&seq_list->osl_seq_init_sem);
if (rc != 0) {
if (osd_seq != NULL && osd_seq->os_compat_dirs != NULL)
OBD_FREE_PTR_ARRAY(osd_seq->os_compat_dirs,
osd_seq->os_subdir_count);
OBD_FREE_PTR(osd_seq);
osd_seq = ERR_PTR(rc);
}
RETURN(osd_seq);
}
static uint64_t
osd_get_idx_for_ost_obj_compat(const struct lu_env *env, struct osd_device *osd,
const struct lu_fid *fid, char *buf, int bufsize)
{
struct osd_seq *osd_seq;
unsigned long b;
u64 id;
int rc;
osd_seq = osd_find_or_add_seq(env, osd, fid_seq(fid));
if (IS_ERR(osd_seq)) {
CERROR("%s: Can not find seq group "DFID"\n", osd_name(osd),
PFID(fid));
return PTR_ERR(osd_seq);
}
if (fid_is_last_id(fid)) {
id = 0;
} else {
rc = fid_to_ostid(fid, &osd_oti_get(env)->oti_ostid);
LASSERT(rc == 0); /* we should not get here with IGIF */
id = ostid_id(&osd_oti_get(env)->oti_ostid);
}
b = id % OSD_OST_MAP_SIZE;
LASSERT(osd_seq->os_compat_dirs[b]);
if (buf)
snprintf(buf, bufsize, "%llu", id);
return osd_seq->os_compat_dirs[b];
}
/*
* objects w/o a natural reference (unlike a file on a MDS)
* are put under a special hierarchy /O/<seq>/d0..dXX
* this function returns a directory specific fid belongs to
*/
static uint64_t
osd_get_idx_for_ost_obj(const struct lu_env *env, struct osd_device *osd,
const struct lu_fid *fid, char *buf, int bufsize)
{
struct osd_seq *osd_seq;
unsigned long b;
u64 id;
int rc;
osd_seq = osd_find_or_add_seq(env, osd, fid_seq(fid));
if (IS_ERR(osd_seq)) {
CERROR("%s: Can not find seq group "DFID"\n", osd_name(osd),
PFID(fid));
return PTR_ERR(osd_seq);
}
if (fid_is_last_id(fid)) {
if (buf)
snprintf(buf, bufsize, "LAST_ID");
return osd_seq->os_oid;
}
rc = fid_to_ostid(fid, &osd_oti_get(env)->oti_ostid);
LASSERT(rc == 0); /* we should not get here with IGIF */
id = ostid_id(&osd_oti_get(env)->oti_ostid);
b = id % OSD_OST_MAP_SIZE;
LASSERT(osd_seq->os_compat_dirs[b]);
if (buf)
snprintf(buf, bufsize, "%llu", id);
return osd_seq->os_compat_dirs[b];
}
/*
* Determine the zap object id which is being used as the OI for the
* given fid. The lowest N bits in the sequence ID are used as the
* index key. On failure 0 is returned which zfs treats internally
* as an invalid object id.
*/
static uint64_t
osd_get_idx_for_fid(struct osd_device *osd, const struct lu_fid *fid,
char *buf, dnode_t **zdn, int bufsize)
{
struct osd_oi *oi;
oi = osd_fid2oi(osd, fid);
if (buf)
osd_fid2str(buf, fid, bufsize);
if (zdn)
*zdn = oi->oi_dn;
return oi->oi_zapid;
}
static uint64_t
osd_get_name_n_idx_compat(const struct lu_env *env, struct osd_device *osd,
const struct lu_fid *fid, char *buf, int bufsize,
dnode_t **zdn)
{
uint64_t zapid;
LASSERT(fid);
LASSERT(!fid_is_acct(fid));
if (zdn != NULL)
*zdn = NULL;
if (fid_is_echo(fid) || fid_is_on_ost(env, osd, fid)) {
zapid = osd_get_idx_for_ost_obj_compat(env, osd, fid,
buf, bufsize);
} else if (unlikely(fid_seq(fid) == FID_SEQ_LOCAL_FILE)) {
/* special objects with fixed known fids get their name */
char *name = oid2name(fid_oid(fid));
if (name) {
zapid = osd->od_root;
if (buf)
strncpy(buf, name, bufsize);
} else {
zapid = osd_get_idx_for_fid(osd, fid, buf, NULL,
bufsize);
}
} else {
zapid = osd_get_idx_for_fid(osd, fid, buf, zdn, bufsize);
}
return zapid;
}
uint64_t osd_get_name_n_idx(const struct lu_env *env, struct osd_device *osd,
const struct lu_fid *fid, char *buf, int bufsize,
dnode_t **zdn)
{
uint64_t zapid;
LASSERT(fid);
LASSERT(!fid_is_acct(fid));
if (zdn != NULL)
*zdn = NULL;
if (fid_is_echo(fid) || fid_is_last_id(fid) ||
fid_is_on_ost(env, osd, fid)) {
zapid = osd_get_idx_for_ost_obj(env, osd, fid, buf, bufsize);
} else if (unlikely(fid_seq(fid) == FID_SEQ_LOCAL_FILE)) {
/* special objects with fixed known fids get their name */
char *name = oid2name(fid_oid(fid));
if (name) {
zapid = osd->od_root;
if (buf)
strncpy(buf, name, bufsize);
} else {
zapid = osd_get_idx_for_fid(osd, fid, buf, NULL,
bufsize);
}
} else {
zapid = osd_get_idx_for_fid(osd, fid, buf, zdn, bufsize);
}
return zapid;
}
int osd_fid_lookup(const struct lu_env *env, struct osd_device *dev,
const struct lu_fid *fid, uint64_t *oid)
{
struct osd_thread_info *info = osd_oti_get(env);
char *buf = info->oti_buf;
dnode_t *zdn;
uint64_t zapid;
int rc = 0;
ENTRY;
if (CFS_FAIL_CHECK(OBD_FAIL_SRV_ENOENT))
RETURN(-ENOENT);
LASSERT(!fid_is_acct(fid));
if (unlikely(fid_is_fs_root(fid))) {
*oid = dev->od_root;
} else {
zapid = osd_get_name_n_idx(env, dev, fid, buf,
sizeof(info->oti_buf), &zdn);
rc = osd_zap_lookup(dev, zapid, zdn, buf,
8, 1, &info->oti_zde);
if (rc == -ENOENT) {
if (unlikely(fid_is_last_id(fid))) {
zapid = osd_get_name_n_idx_compat(env, dev, fid,
buf, sizeof(info->oti_buf), &zdn);
rc = osd_zap_lookup(dev, zapid, zdn, buf,
8, 1, &info->oti_zde);
} else if (fid_is_objseq(fid) || fid_is_batchid(fid)) {
zapid = osd_get_idx_for_fid(dev, fid,
buf, NULL, sizeof(info->oti_buf));
rc = osd_zap_lookup(dev, zapid, zdn, buf,
8, 1, &info->oti_zde);
}
}
if (rc)
RETURN(rc);
*oid = info->oti_zde.lzd_reg.zde_dnode;
}
if (rc == 0)
dmu_prefetch(dev->od_os, *oid, 0, 0, 0,
ZIO_PRIORITY_ASYNC_READ);
RETURN(rc);
}
/**
* osd_oi_remove_table() - Close an entry in a specific slot.
* @env: Lustre environment
* @o: OSD device
* @key: Index to remove OI
*/
static void
osd_oi_remove_table(const struct lu_env *env, struct osd_device *o, int key)
{
struct osd_oi *oi;
LASSERT(key < o->od_oi_count);
oi = o->od_oi_table[key];
if (oi) {
if (oi->oi_dn)
osd_dnode_rele(oi->oi_dn);
OBD_FREE_PTR(oi);
o->od_oi_table[key] = NULL;
}
}
/**
* osd_oi_add_table() - Allocate & open a new entry in the specified unused slot
* @env: Lustre environment
* @o: OSD device
* @name: Lookup an existing OI by the given name
* @key: Index to allocate new OI
*
* Return:
* * %0 on success
* * %negative on failure
*/
static int
osd_oi_add_table(const struct lu_env *env, struct osd_device *o,
char *name, int key)
{
struct osd_oi *oi;
int rc;
LASSERT(key < o->od_oi_count);
LASSERT(o->od_oi_table[key] == NULL);
OBD_ALLOC_PTR(oi);
if (oi == NULL)
return -ENOMEM;
rc = osd_oi_lookup(env, o, o->od_root, name, oi);
if (rc) {
OBD_FREE_PTR(oi);
return rc;
}
o->od_oi_table[key] = oi;
__osd_obj2dnode(o->od_os, oi->oi_zapid, &oi->oi_dn);
return 0;
}
/*
* osd_oi_close_table() - Depopulate the OI table.
* @env: Lustre environment
* @o: OSD device
*/
static void
osd_oi_close_table(const struct lu_env *env, struct osd_device *o)
{
int i;
for (i = 0; i < o->od_oi_count; i++)
osd_oi_remove_table(env, o, i);
}
/**
* osd_oi_open_table() - Populate the OI table based.
* @env: Lustre environment
* @o: OSD device
* @count: Number of OI in system
*
* Return:
* * %0 on success
* * %negative on failure
*/
static int
osd_oi_open_table(const struct lu_env *env, struct osd_device *o, int count)
{
char name[16];
int i, rc = 0;
ENTRY;
for (i = 0; i < count; i++) {
sprintf(name, "%s.%d", DMU_OSD_OI_NAME_BASE, i);
rc = osd_oi_add_table(env, o, name, i);
if (rc) {
osd_oi_close_table(env, o);
break;
}
}
RETURN(rc);
}
/**
* osd_oi_probe() - Determine if the type and number of OIs used by this file
* system.
* @env: Lustre environment
* @o: OSD device
*
* Return:
* * %0 on success
* * %negative on failure
*/
static int osd_oi_probe(const struct lu_env *env, struct osd_device *o)
{
struct lustre_scrub *scrub = &o->od_scrub;
struct scrub_file *sf = &scrub->os_file;
struct osd_oi oi;
char name[16];
int max = sf->sf_oi_count > 0 ? sf->sf_oi_count : OSD_OI_FID_NR_MAX;
int count;
int rc;
ENTRY;
/*
* Check for multiple OIs and determine the count. There is no
* gap handling, if an OI is missing the wrong size can be returned.
* The only safeguard is that we know the number of OIs must be a
* power of two and this is checked for basic sanity.
*/
for (count = 0; count < max; count++) {
snprintf(name, sizeof(name) - 1, "%s.%d",
DMU_OSD_OI_NAME_BASE, count);
rc = osd_oi_lookup(env, o, o->od_root, name, &oi);
if (!rc)
continue;
if (rc == -ENOENT) {
if (sf->sf_oi_count == 0)
RETURN(count);
zfs_set_bit(count, sf->sf_oi_bitmap);
continue;
}
if (rc)
RETURN(rc);
}
RETURN(count);
}
static void osd_ost_seq_fini(const struct lu_env *env, struct osd_device *osd)
{
struct osd_seq_list *osl = &osd->od_seq_list;
struct osd_seq *osd_seq, *tmp;
write_lock(&osl->osl_seq_list_lock);
list_for_each_entry_safe(osd_seq, tmp, &osl->osl_seq_list,
os_seq_list) {
list_del(&osd_seq->os_seq_list);
OBD_FREE_PTR_ARRAY(osd_seq->os_compat_dirs,
osd_seq->os_subdir_count);
OBD_FREE(osd_seq, sizeof(*osd_seq));
}
write_unlock(&osl->osl_seq_list_lock);
}
/**
* osd_oi_init_compat() - Create /O subdirectory to map legacy OST objects for
* compatibility.
* @env: Lustre environment
* @o: OSD device
*
* Return:
* * %0 on success
* * %negative on failure
*/
static int
osd_oi_init_compat(const struct lu_env *env, struct osd_device *o)
{
uint64_t sdb;
int rc;
ENTRY;
rc = osd_oi_find_or_create(env, o, o->od_root, "O", &sdb);
if (!rc)
o->od_O_id = sdb;
RETURN(rc);
}
static int
osd_oi_init_index_backup(const struct lu_env *env, struct osd_device *o)
{
struct lu_fid *fid = &osd_oti_get(env)->oti_fid;
int rc;
ENTRY;
lu_local_obj_fid(fid, INDEX_BACKUP_OID);
rc = osd_obj_find_or_create(env, o, o->od_root, INDEX_BACKUP_DIR,
&o->od_index_backup_id, fid, true);
RETURN(rc);
}
static void
osd_oi_init_remote_parent(const struct lu_env *env, struct osd_device *o)
{
uint64_t sdb;
int rc;
ENTRY;
if (o->od_is_ost) {
o->od_remote_parent_dir = ZFS_NO_OBJECT;
} else {
/* Remote parent only used for cross-MDT objects, it is usless
* for single MDT case or under read only mode. Ignore failure.
*/
rc = osd_oi_find_or_create(env, o, o->od_root,
REMOTE_PARENT_DIR, &sdb);
if (!rc)
o->od_remote_parent_dir = sdb;
else
o->od_remote_parent_dir = ZFS_NO_OBJECT;
}
}
/**
* osd_oi_init() - Initialize OIs by either opening or creating them as needed.
* @env: Lustre environment
* @o: OSD device
* @reset: %False open existing else create
*
* Return:
* * %0 on success
* * %negative on failure
*/
int osd_oi_init(const struct lu_env *env, struct osd_device *o, bool reset)
{
struct lustre_scrub *scrub = &o->od_scrub;
struct scrub_file *sf = &scrub->os_file;
char *key = osd_oti_get(env)->oti_buf;
uint64_t sdb;
int i, rc, count;
ENTRY;
LASSERTF((sf->sf_oi_count & (sf->sf_oi_count - 1)) == 0,
"Invalid OI count in scrub file %d\n", sf->sf_oi_count);
rc = osd_oi_init_index_backup(env, o);
if (rc)
RETURN(rc);
osd_oi_init_remote_parent(env, o);
rc = osd_oi_init_compat(env, o);
if (rc)
RETURN(rc);
count = osd_oi_probe(env, o);
if (count < 0)
GOTO(out, rc = count);
if (count > 0) {
if (count == sf->sf_oi_count && !reset)
goto open;
if (sf->sf_oi_count == 0) {
if (likely((count & (count - 1)) == 0)) {
sf->sf_oi_count = count;
rc = scrub_file_store(env, scrub);
if (rc)
GOTO(out, rc);
goto open;
}
LCONSOLE_ERROR("%s: invalid oi count %d. You can remove all OIs, then remount it\n",
osd_name(o), count);
GOTO(out, rc = -EDOM);
}
scrub_file_reset(scrub, o->od_uuid, SF_RECREATED);
count = sf->sf_oi_count;
} else {
if (sf->sf_oi_count > 0) {
count = sf->sf_oi_count;
memset(sf->sf_oi_bitmap, 0, SCRUB_OI_BITMAP_SIZE);
for (i = 0; i < count; i++)
zfs_set_bit(i, sf->sf_oi_bitmap);
scrub_file_reset(scrub, o->od_uuid, SF_RECREATED);
} else {
count = sf->sf_oi_count = osd_oi_count;
}
}
rc = scrub_file_store(env, scrub);
if (rc)
GOTO(out, rc);
if (reset)
LCONSOLE_WARN("%s: reset Object Index mappings\n",
osd_name(o));
for (i = 0; i < count; i++) {
LASSERT(sizeof(osd_oti_get(env)->oti_buf) >= 32);
snprintf(key, sizeof(osd_oti_get(env)->oti_buf) - 1,
"%s.%d", DMU_OSD_OI_NAME_BASE, i);
if (reset) {
rc = osd_oi_destroy(env, o, key);
if (rc)
GOTO(out, rc);
}
rc = osd_oi_find_or_create(env, o, o->od_root, key, &sdb);
if (rc)
GOTO(out, rc);
}
open:
LASSERT((count & (count - 1)) == 0);
o->od_oi_count = count;
OBD_ALLOC_PTR_ARRAY(o->od_oi_table, count);
if (o->od_oi_table == NULL)
GOTO(out, rc = -ENOMEM);
rc = osd_oi_open_table(env, o, count);
GOTO(out, rc);
out:
if (rc) {
osd_ost_seq_fini(env, o);
if (o->od_oi_table) {
OBD_FREE_PTR_ARRAY(o->od_oi_table, count);
o->od_oi_table = NULL;
}
}
return rc;
}
void osd_oi_fini(const struct lu_env *env, struct osd_device *o)
{
ENTRY;
osd_ost_seq_fini(env, o);
if (o->od_oi_table != NULL) {
(void) osd_oi_close_table(env, o);
OBD_FREE_PTR_ARRAY(o->od_oi_table, o->od_oi_count);
o->od_oi_table = NULL;
o->od_oi_count = 0;
}
EXIT;
}
int osd_options_init(void)
{
/* osd_oi_count - Default number of OIs, 128 works well for ZFS */
if (osd_oi_count == 0 || osd_oi_count > OSD_OI_FID_NR_MAX)
osd_oi_count = OSD_OI_FID_NR;
if ((osd_oi_count & (osd_oi_count - 1)) != 0) {
LCONSOLE_WARN("Round up osd_oi_count %d to power2 %d\n",
osd_oi_count, size_roundup_power2(osd_oi_count));
osd_oi_count = size_roundup_power2(osd_oi_count);
}
return 0;
}
/*
* the following set of functions are used to maintain per-thread
* cache of FID->ino mapping. this mechanism is used to avoid
* expensive LU/OI lookups.
*/
struct osd_idmap_cache *osd_idc_find(const struct lu_env *env,
struct osd_device *osd,
const struct lu_fid *fid)
{
struct osd_thread_info *oti = osd_oti_get(env);
struct osd_idmap_cache *idc = oti->oti_ins_cache;
int i;
for (i = 0; i < oti->oti_ins_cache_used; i++) {
if (!lu_fid_eq(&idc[i].oic_fid, fid))
continue;
if (idc[i].oic_dev != osd)
continue;
return idc + i;
}
return NULL;
}
static struct osd_idmap_cache *osd_idc_add(const struct lu_env *env,
struct osd_device *osd,
const struct lu_fid *fid)
{
struct osd_thread_info *oti = osd_oti_get(env);
struct osd_idmap_cache *idc;
int i;
if (unlikely(oti->oti_ins_cache_used >= oti->oti_ins_cache_size)) {
i = oti->oti_ins_cache_size * 2;
if (i == 0)
i = OSD_INS_CACHE_SIZE;
OBD_ALLOC_PTR_ARRAY_LARGE(idc, i);
if (idc == NULL)
return ERR_PTR(-ENOMEM);
if (oti->oti_ins_cache != NULL) {
memcpy(idc, oti->oti_ins_cache,
oti->oti_ins_cache_used * sizeof(*idc));
OBD_FREE_PTR_ARRAY_LARGE(oti->oti_ins_cache,
oti->oti_ins_cache_used);
}
oti->oti_ins_cache = idc;
oti->oti_ins_cache_size = i;
}
idc = &oti->oti_ins_cache[oti->oti_ins_cache_used++];
idc->oic_fid = *fid;
idc->oic_dev = osd;
idc->oic_dnode = 0;
idc->oic_remote = 0;
return idc;
}
/**
* osd_idc_find_or_init() - Lookup mapping for the given fid in the cache
* @env: Lustre environment
* @osd: OSD device
* @fid: FID to lookup for mapping
*
* Initialize a new one if not found. the initialization checks whether
* the object is local or remote. for the local objects, OI is used to
* learn dnode#. the function is used when the caller has no information
* about the object, e.g. at dt_insert().
*
* Return:
* * %0 on success
* * %negative on failure
*/
struct osd_idmap_cache *osd_idc_find_or_init(const struct lu_env *env,
struct osd_device *osd,
const struct lu_fid *fid)
{
struct osd_idmap_cache *idc;
int rc;
LASSERT(!fid_is_acct(fid));
idc = osd_idc_find(env, osd, fid);
if (idc != NULL)
return idc;
CDEBUG(D_INODE, "%s: FID "DFID" not in the id map cache\n",
osd->od_svname, PFID(fid));
/* new mapping is needed */
idc = osd_idc_add(env, osd, fid);
if (IS_ERR(idc)) {
CERROR("%s: FID "DFID" add id map cache failed: %ld\n",
osd->od_svname, PFID(fid), PTR_ERR(idc));
return idc;
}
/* initialize it */
rc = osd_remote_fid(env, osd, fid);
if (unlikely(rc < 0))
return ERR_PTR(rc);
if (rc == 0) {
/* the object is local, lookup in OI */
uint64_t dnode;
rc = osd_fid_lookup(env, osd, fid, &dnode);
if (unlikely(rc < 0)) {
CERROR("%s: can't lookup: rc = %d\n",
osd->od_svname, rc);
return ERR_PTR(rc);
}
LASSERT(dnode < (1ULL << DN_MAX_OBJECT_SHIFT));
idc->oic_dnode = dnode;
} else {
/* the object is remote */
idc->oic_remote = 1;
}
return idc;
}
/*
* lookup mapping for given FID and fill it from the given object.
* the object is local by definition.
*/
int osd_idc_find_and_init(const struct lu_env *env, struct osd_device *osd,
struct osd_object *obj)
{
const struct lu_fid *fid = lu_object_fid(&obj->oo_dt.do_lu);
struct osd_idmap_cache *idc;
idc = osd_idc_find(env, osd, fid);
if (idc != NULL) {
if (obj->oo_dn == NULL)
return 0;
idc->oic_dnode = obj->oo_dn->dn_object;
return 0;
}
CDEBUG(D_INODE, "%s: FID "DFID" not in the id map cache\n",
osd->od_svname, PFID(fid));
/* new mapping is needed */
idc = osd_idc_add(env, osd, fid);
if (IS_ERR(idc)) {
CERROR("%s: FID "DFID" add id map cache failed: %ld\n",
osd->od_svname, PFID(fid), PTR_ERR(idc));
return PTR_ERR(idc);
}
if (obj->oo_dn)
idc->oic_dnode = obj->oo_dn->dn_object;
return 0;
}
int osd_idc_find_and_init_with_oid(const struct lu_env *env,
struct osd_device *osd,
const struct lu_fid *fid,
uint64_t oid)
{
struct osd_idmap_cache *idc;
idc = osd_idc_find(env, osd, fid);
if (!idc) {
idc = osd_idc_add(env, osd, fid);
if (IS_ERR(idc))
return PTR_ERR(idc);
}
idc->oic_dnode = oid;
idc->oic_remote = 0;
return 0;
}
