Viewing: osd_handler.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/
*
* Top-level entry points into osd module
*
* Author: Alex Zhuravlev <bzzz@whamcloud.com>
* Author: Mike Pershin <tappro@whamcloud.com>
* Author: Johann Lombardi <johann@whamcloud.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 <uapi/linux/lustre/lustre_param.h>
#include <md_object.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>
struct lu_context_key osd_key;
static int osd_txg_sync_delay_us = -1;
/* Slab for OSD object allocation */
struct kmem_cache *osd_object_kmem;
/* Slab to allocate osd_zap_it */
struct kmem_cache *osd_zapit_cachep;
static struct lu_kmem_descr osd_caches[] = {
{
.ckd_cache = &osd_object_kmem,
.ckd_name = "zfs_osd_obj",
.ckd_size = sizeof(struct osd_object)
},
{
.ckd_cache = &osd_zapit_cachep,
.ckd_name = "osd_zapit_cache",
.ckd_size = sizeof(struct osd_zap_it)
},
{
.ckd_cache = NULL
}
};
#ifdef HAVE_ZFS_ARC_PRUNE_FUNC_UINT64
static void arc_prune_func(uint64_t bytes, void *private)
#else
static void arc_prune_func(int64_t bytes, void *private)
#endif
{
struct osd_device *od = private;
struct lu_site *site = &od->od_site;
struct lu_env env;
int rc;
rc = lu_env_init(&env, LCT_SHRINKER);
if (rc) {
CERROR("%s: can't initialize shrinker env: rc = %d\n",
od->od_svname, rc);
return;
}
lu_site_limit(&env, site, (bytes >> 10));
lu_env_fini(&env);
}
/*
* Concurrency: doesn't access mutable data
*/
static int osd_root_get(const struct lu_env *env,
struct dt_device *dev, struct lu_fid *f)
{
lu_local_obj_fid(f, OSD_FS_ROOT_OID);
return 0;
}
/*
* OSD object methods.
*/
/*
* Concurrency: shouldn't matter.
*/
static void osd_trans_commit_cb(void *cb_data, int error)
{
struct osd_thandle *oh = cb_data;
struct thandle *th = &oh->ot_super;
struct osd_device *osd = osd_dt_dev(th->th_dev);
struct lu_device *lud = &th->th_dev->dd_lu_dev;
struct dt_txn_commit_cb *dcb, *tmp;
int slot;
ENTRY;
if (error) {
if (error == ECANCELED)
CWARN("%s: transaction @0x%p was aborted\n",
osd_dt_dev(th->th_dev)->od_svname, th);
else
CERROR("%s: transaction @0x%p commit error: rc = %d\n",
osd_dt_dev(th->th_dev)->od_svname, th, error);
}
/* call per-transaction callbacks if any */
list_for_each_entry_safe(dcb, tmp, &oh->ot_dcb_list, dcb_linkage) {
LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
"commit callback entry: magic=%x name='%s'\n",
dcb->dcb_magic, dcb->dcb_name);
list_del_init(&dcb->dcb_linkage);
dcb->dcb_func(NULL, th, dcb, error);
}
/* Unlike ldiskfs, zfs updates space accounting at commit time.
* As a consequence, op_end is called only now to inform the quota slave
* component that reserved quota space is now accounted in usage and
* should be released. Quota space won't be adjusted at this point since
* we can't provide a suitable environment. It will be performed
* asynchronously by a lquota thread.
*/
qsd_op_end(NULL, osd->od_quota_slave_dt, &oh->ot_quota_trans);
if (osd->od_quota_slave_md != NULL)
qsd_op_end(NULL, osd->od_quota_slave_md, &oh->ot_quota_trans);
slot = oh->ot_txg & OSD_TXG_MAP_MASK;
LASSERT(atomic_read(&osd->od_commit_cb_in_txg[slot]) > 0);
if (atomic_dec_and_test(&osd->od_commit_cb_in_txg[slot]))
wake_up(&osd->od_commit_cb_waitq);
lu_device_put(lud);
th->th_dev = NULL;
OBD_FREE_PTR(oh);
EXIT;
}
static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
{
struct osd_thandle *oh = container_of(th, struct osd_thandle,
ot_super);
LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
LASSERT(dcb->dcb_func);
if (dcb->dcb_flags & DCB_TRANS_STOP)
list_add(&dcb->dcb_linkage, &oh->ot_stop_dcb_list);
else
list_add(&dcb->dcb_linkage, &oh->ot_dcb_list);
return 0;
}
/*
* Concurrency: shouldn't matter.
*/
static int osd_trans_start(const struct lu_env *env, struct dt_device *d,
struct thandle *th)
{
struct osd_device *osd = osd_dt_dev(d);
struct osd_thandle *oh;
int rc;
ENTRY;
oh = container_of(th, struct osd_thandle, ot_super);
LASSERT(oh);
LASSERT(oh->ot_tx);
rc = dt_txn_hook_start(env, d, th);
if (rc != 0) {
CERROR("%s: dt_txn_hook_start failed: rc = %d\n",
osd->od_svname, rc);
RETURN(rc);
}
if (CFS_FAIL_CHECK(OBD_FAIL_OSD_TXN_START))
/* Unlike ldiskfs, ZFS checks for available space and returns
* -ENOSPC when assigning txg
*/
RETURN(-EIO);
rc = -dmu_tx_assign(oh->ot_tx, DMU_TX_WAIT);
if (unlikely(rc != 0)) {
/* dmu will call commit callback with error code during abort */
if (!lu_device_is_md(&d->dd_lu_dev) && rc == -ENOSPC)
CERROR("%s: failed to start transaction due to ENOSPC: rc = %d\n",
osd->od_svname, rc);
else
CERROR("%s: can't assign tx: rc = %d\n",
osd->od_svname, rc);
} else {
int slot;
/* add commit callback */
dmu_tx_callback_register(oh->ot_tx, osd_trans_commit_cb, oh);
/* count all registered commit callbacks in txg-specific slot,
* we can wait for the callbacks to complete later */
if (oh->ot_tx->tx_txg > atomic64_read(&osd->od_last_txg))
atomic64_set(&osd->od_last_txg, oh->ot_tx->tx_txg);
oh->ot_txg = oh->ot_tx->tx_txg;
slot = oh->ot_txg & OSD_TXG_MAP_MASK;
atomic_inc(&osd->od_commit_cb_in_txg[slot]);
oh->ot_assigned = 1;
osd_oti_get(env)->oti_in_trans = 1;
lu_device_get(&d->dd_lu_dev);
}
RETURN(rc);
}
static void osd_unlinked_list_emptify(const struct lu_env *env,
struct osd_device *osd,
struct list_head *list, bool free)
{
struct osd_object *obj;
uint64_t oid;
while (!list_empty(list)) {
obj = list_first_entry(list,
struct osd_object, oo_unlinked_linkage);
LASSERT(obj->oo_dn != NULL);
oid = obj->oo_dn->dn_object;
list_del_init(&obj->oo_unlinked_linkage);
if (free)
(void)osd_unlinked_object_free(env, osd, oid);
}
}
static void osd_trans_stop_cb(struct osd_thandle *oth, int result)
{
struct dt_txn_commit_cb *dcb;
struct dt_txn_commit_cb *tmp;
/* call per-transaction stop callbacks if any */
list_for_each_entry_safe(dcb, tmp, &oth->ot_stop_dcb_list,
dcb_linkage) {
LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
"commit callback entry: magic=%x name='%s'\n",
dcb->dcb_magic, dcb->dcb_name);
list_del_init(&dcb->dcb_linkage);
dcb->dcb_func(NULL, &oth->ot_super, dcb, result);
}
}
/*
* Concurrency: shouldn't matter.
*/
static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
struct thandle *th)
{
struct osd_device *osd = osd_dt_dev(th->th_dev);
bool sync = (th->th_sync != 0);
struct osd_thandle *oh;
LIST_HEAD(unlinked);
uint64_t txg;
int rc;
ENTRY;
oh = container_of(th, struct osd_thandle, ot_super);
list_splice_init(&oh->ot_unlinked_list, &unlinked);
osd_oti_get(env)->oti_ins_cache_depth--;
/* reset OI cache for safety */
if (osd_oti_get(env)->oti_ins_cache_depth == 0)
osd_oti_get(env)->oti_ins_cache_used = 0;
if (oh->ot_assigned == 0) {
LASSERT(oh->ot_tx);
CDEBUG(D_OTHER, "%s: transaction is aborted\n", osd->od_svname);
osd_trans_stop_cb(oh, th->th_result);
dmu_tx_abort(oh->ot_tx);
osd_object_sa_dirty_rele(env, oh);
osd_unlinked_list_emptify(env, osd, &unlinked, false);
/* there won't be any commit, release reserved quota space now,
* if any
*/
qsd_op_end(env, osd->od_quota_slave_dt, &oh->ot_quota_trans);
if (osd->od_quota_slave_md != NULL)
qsd_op_end(env, osd->od_quota_slave_md,
&oh->ot_quota_trans);
OBD_FREE_PTR(oh);
RETURN(0);
}
rc = dt_txn_hook_stop(env, th);
if (rc != 0)
CDEBUG(D_OTHER, "%s: transaction hook failed: rc = %d\n",
osd->od_svname, rc);
osd_trans_stop_cb(oh, rc);
LASSERT(oh->ot_tx);
txg = oh->ot_tx->tx_txg;
osd_object_sa_dirty_rele(env, oh);
/* XXX: Once dmu_tx_commit() called, oh/th could have been freed
* by osd_trans_commit_cb already.
*/
dmu_tx_commit(oh->ot_tx);
osd_oti_get(env)->oti_in_trans = 0;
osd_unlinked_list_emptify(env, osd, &unlinked, true);
if (sync) {
if (osd_txg_sync_delay_us < 0)
txg_wait_synced(dmu_objset_pool(osd->od_os), txg);
else
udelay(osd_txg_sync_delay_us);
}
RETURN(rc);
}
static struct thandle *osd_trans_create(const struct lu_env *env,
struct dt_device *dt)
{
struct osd_device *osd = osd_dt_dev(dt);
struct osd_thandle *oh;
struct thandle *th;
dmu_tx_t *tx;
int rc;
ENTRY;
if (dt->dd_rdonly) {
rc = -EROFS;
CERROR("%s: someone try to start transaction under readonly mode, should be disabled: rc = %d\n",
osd_name(osd_dt_dev(dt)), rc);
dump_stack();
RETURN(ERR_PTR(rc));
}
tx = dmu_tx_create(osd->od_os);
if (tx == NULL) {
rc = -ENOMEM;
CDEBUG(D_OTHER, "%s: dmu_tx_create Failed: rc = %d\n",
osd_name(osd_dt_dev(dt)), rc);
RETURN(ERR_PTR(rc));
}
/* alloc callback data */
OBD_ALLOC_PTR(oh);
if (oh == NULL) {
rc = -ENOMEM;
dmu_tx_abort(tx);
CDEBUG(D_OTHER, "%s: Allocate memory failed for osd_handle: rc = %d\n",
osd_name(osd_dt_dev(dt)), rc);
RETURN(ERR_PTR(rc));
}
oh->ot_tx = tx;
INIT_LIST_HEAD(&oh->ot_dcb_list);
INIT_LIST_HEAD(&oh->ot_stop_dcb_list);
INIT_LIST_HEAD(&oh->ot_unlinked_list);
INIT_LIST_HEAD(&oh->ot_sa_list);
memset(&oh->ot_quota_trans, 0, sizeof(oh->ot_quota_trans));
th = &oh->ot_super;
th->th_dev = dt;
th->th_result = 0;
osd_oti_get(env)->oti_ins_cache_depth++;
RETURN(th);
}
/* Estimate the total number of objects from a number of blocks */
uint64_t osd_objs_count_estimate(uint64_t usedbytes, uint64_t usedobjs,
uint64_t nrblocks, uint64_t est_maxblockshift)
{
uint64_t est_totobjs, est_usedblocks, est_usedobjs;
/*
* If blocksize is below 64KB (e.g. MDT with recordsize=4096) then
* bump the free dnode estimate to assume blocks at least 64KB in
* case of a directory-heavy MDT (at 32KB/directory).
*/
if (est_maxblockshift < 16) {
nrblocks >>= (16 - est_maxblockshift);
est_maxblockshift = 16;
}
/*
* Estimate the total number of dnodes from the total blocks count
* and the space used per dnode. Since we don't know the overhead
* associated with each dnode (xattrs, SAs, VDEV overhead, etc.)
* just using DNODE_SHIFT isn't going to give a good estimate.
* Instead, compute the current average space usage per dnode, with
* an upper and lower cap to avoid unrealistic estimates..
*
* In case there aren't many dnodes or blocks used yet, add a small
* correction factor (OSD_DNODE_EST_{COUNT,BLKSHIFT}). This factor
* gradually disappears as the number of real dnodes grows. It also
* avoids the need to check for divide-by-zero computing dn_per_block.
*/
BUILD_BUG_ON(OSD_DNODE_MIN_BLKSHIFT <= 0);
BUILD_BUG_ON(OSD_DNODE_EST_BLKSHIFT <= 0);
est_usedblocks = ((OSD_DNODE_EST_COUNT << OSD_DNODE_EST_BLKSHIFT) +
usedbytes) >> est_maxblockshift;
est_usedobjs = OSD_DNODE_EST_COUNT + usedobjs;
if (est_usedobjs <= est_usedblocks) {
/*
* Average space/dnode more than maximum block size, use max
* block size to estimate free dnodes from adjusted free blocks
* count. OSTs typically use multiple blocks per dnode so this
* case applies.
*/
est_totobjs = nrblocks;
} else if (est_usedobjs >= (est_usedblocks << OSD_DNODE_MIN_BLKSHIFT)) {
/*
* Average space/dnode smaller than min dnode size (probably
* due to metadnode compression), use min dnode size to
* estimate object count. MDTs may use only one block per node
* so this case applies.
*/
est_totobjs = nrblocks << OSD_DNODE_MIN_BLKSHIFT;
} else {
/*
* Between the extremes, use average space per existing dnode
* to compute the number of dnodes that will fit into nrblocks:
*
* est_totobjs = nrblocks * (est_usedobjs / est_usedblocks)
*
* this may overflow 64 bits or become 0 if not handled well.
*
* We know nrblocks is below 2^(64 - blkbits) bits, and
* est_usedobjs is under 48 bits due to DN_MAX_OBJECT_SHIFT,
* which means that multiplying them may get as large as
* 2 ^ 96 for the minimum blocksize of 64KB allowed above.
*
* The ratio of dnodes per block (est_usedobjs / est_usedblocks)
* is under 2^(blkbits - DNODE_SHIFT) = blocksize / 512 due to
* the limit checks above, so we can safely compute this first.
* We care more about accuracy on the MDT (many dnodes/block)
* which is good because this is where truncation errors are
* smallest. Since both nrblocks and dn_per_block are a
* function of blkbits, their product is at most:
*
* 2^(64 - blkbits) * 2^(blkbits - DNODE_SHIFT) = 2^(64 - 9)
*
* so we can safely use 7 bits to compute a fixed-point
* fraction and est_totobjs can still fit in 64 bits.
*/
unsigned int dn_per_block = (est_usedobjs << 7) /
est_usedblocks;
est_totobjs = (nrblocks * dn_per_block) >> 7;
}
return est_totobjs;
}
static int osd_objset_statfs(struct osd_device *osd, struct obd_statfs *osfs)
{
struct objset *os = osd->od_os;
uint64_t usedbytes, availbytes, usedobjs, availobjs;
uint64_t est_availobjs;
uint64_t reserved;
uint64_t bshift;
dmu_objset_space(os, &usedbytes, &availbytes, &usedobjs, &availobjs);
memset(osfs, 0, sizeof(*osfs));
/* We're a zfs filesystem. */
osfs->os_type = UBERBLOCK_MAGIC;
/*
* ZFS allows multiple block sizes. For statfs, Linux makes no
* proper distinction between bsize and frsize. For calculations
* of free and used blocks incorrectly uses bsize instead of frsize,
* but bsize is also used as the optimal blocksize. We return the
* largest possible block size as IO size for the optimum performance
* and scale the free and used blocks count appropriately.
*/
osfs->os_bsize = osd->od_max_blksz;
bshift = fls64(osfs->os_bsize) - 1;
osfs->os_blocks = (usedbytes + availbytes) >> bshift;
osfs->os_bfree = availbytes >> bshift;
osfs->os_bavail = osfs->os_bfree; /* no extra root reservation */
/* Take replication (i.e. number of copies) into account */
if (os->os_copies != 0)
osfs->os_bavail /= os->os_copies;
/*
* Reserve some space so we don't run into ENOSPC due to grants not
* accounting for metadata overhead in ZFS, and to avoid fragmentation.
* Rather than report this via os_bavail (which makes users unhappy if
* they can't fill the filesystem 100%), reduce os_blocks as well.
*
* Reserve 0.78% of total space, at least 16MB for small filesystems,
* for internal files to be created/unlinked when space is tight.
*/
BUILD_BUG_ON(OSD_STATFS_RESERVED_SIZE <= 0);
reserved = OSD_STATFS_RESERVED_SIZE >> bshift;
if (likely(osfs->os_blocks >= reserved << OSD_STATFS_RESERVED_SHIFT))
reserved = osfs->os_blocks >> OSD_STATFS_RESERVED_SHIFT;
osfs->os_blocks -= reserved;
osfs->os_bfree -= min(reserved, osfs->os_bfree);
osfs->os_bavail -= min(reserved, osfs->os_bavail);
/*
* The availobjs value returned from dmu_objset_space() is largely
* useless, since it reports the number of objects that might
* theoretically still fit into the dataset, independent of minor
* issues like how much space is actually available in the pool.
* Compute a better estimate in udmu_objs_count_estimate().
*/
est_availobjs = osd_objs_count_estimate(usedbytes, usedobjs,
osfs->os_bfree, bshift);
osfs->os_ffree = min(availobjs, est_availobjs);
osfs->os_files = osfs->os_ffree + usedobjs;
/* ZFS XXX: fill in backing dataset FSID/UUID
* memcpy(osfs->os_fsid, .... );
*/
osfs->os_namelen = MAXNAMELEN;
osfs->os_maxbytes = OBD_OBJECT_EOF;
if (!spa_writeable(dmu_objset_spa(os)) ||
osd->od_dev_set_rdonly || osd->od_prop_rdonly)
osfs->os_state |= OS_STATFS_READONLY;
return 0;
}
/*
* Concurrency: shouldn't matter.
*/
int osd_statfs(const struct lu_env *env, struct dt_device *d,
struct obd_statfs *osfs, struct obd_statfs_info *info)
{
struct osd_device *osd = osd_dt_dev(d);
int rc;
ENTRY;
rc = osd_objset_statfs(osd, osfs);
if (unlikely(rc != 0))
RETURN(rc);
osfs->os_bavail -= min_t(u64,
OSD_GRANT_FOR_LOCAL_OIDS / osfs->os_bsize,
osfs->os_bavail);
/* ZFS does not support reporting nonrotional status yet, so return
* flag only if user has set nonrotational.
*/
osfs->os_state |= osd->od_nonrotational ? OS_STATFS_NONROT : 0;
RETURN(0);
}
static int osd_blk_insert_cost(struct osd_device *osd)
{
int max_blockshift, nr_blkptrshift, bshift;
/* max_blockshift is the log2 of the number of blocks needed to reach
* the maximum filesize (that's to say 2^64)
*/
bshift = fls64(spa_maxblocksize(dmu_objset_spa(osd->od_os)) - 1);
max_blockshift = DN_MAX_OFFSET_SHIFT - bshift;
/* nr_blkptrshift is the log2 of the number of block pointers that can
* be stored in an indirect block
*/
BUILD_BUG_ON(DN_MAX_INDBLKSHIFT <= SPA_BLKPTRSHIFT);
nr_blkptrshift = DN_MAX_INDBLKSHIFT - SPA_BLKPTRSHIFT;
/* max_blockshift / nr_blkptrshift is thus the maximum depth of the
* tree. We add +1 for rounding purpose.
* The tree depth times the indirect block size gives us the maximum
* cost of inserting a block in the tree
*/
return (max_blockshift / nr_blkptrshift + 1) * (1<<DN_MAX_INDBLKSHIFT);
}
/*
* Concurrency: doesn't access mutable data.
*/
static void osd_conf_get(const struct lu_env *env,
const struct dt_device *dev,
struct dt_device_param *param)
{
struct osd_device *osd = osd_dt_dev(dev);
/*
* XXX should be taken from not-yet-existing fs abstraction layer.
*/
param->ddp_max_name_len = MAXNAMELEN;
param->ddp_max_nlink = 1 << 31; /* it's 8byte on a disk */
param->ddp_symlink_max = PATH_MAX;
param->ddp_mount_type = LDD_MT_ZFS;
param->ddp_mntopts = MNTOPT_USERXATTR;
if (osd->od_posix_acl)
param->ddp_mntopts |= MNTOPT_ACL;
/* Previously DXATTR_MAX_ENTRY_SIZE */
param->ddp_max_ea_size = OBD_MAX_EA_SIZE;
/* for maxbytes, report same value as ZPL */
param->ddp_maxbytes = MAX_LFS_FILESIZE;
/* inodes are dynamically allocated, so we report the per-inode space
* consumption to upper layers. This static value is not really accurate
* and we should use the same logic as in udmu_objset_statfs() to
* estimate the real size consumed by an object
*/
param->ddp_inodespace = OSD_DNODE_EST_COUNT;
/* Although ZFS isn't an extent-based filesystem, the metadata overhead
* (i.e. 7 levels of indirect blocks, see osd_blk_insert_cost()) should
* not be accounted for every single new block insertion.
* Instead, the maximum extent size is set to the number of blocks that
* can fit into a single contiguous indirect block. There would be some
* cases where this crosses indirect blocks, but it also won't have 7
* new levels of indirect blocks in that case either, so it will still
* have enough reserved space for the extra indirect block
*/
param->ddp_max_extent_blks =
(1 << (DN_MAX_INDBLKSHIFT - SPA_BLKPTRSHIFT));
param->ddp_extent_tax = osd_blk_insert_cost(osd);
/* Preferred RPC size for efficient disk IO. 1MB shows good
* all-around performance for ZFS, but use blocksize (recordsize)
* by default if larger to avoid read-modify-write.
*/
if (osd->od_max_blksz > ONE_MB_BRW_SIZE)
param->ddp_brw_size = osd->od_max_blksz;
else
param->ddp_brw_size = ONE_MB_BRW_SIZE;
#ifdef HAVE_DMU_OFFSET_NEXT
param->ddp_has_lseek_data_hole = osd->od_sync_on_lseek;
#else
param->ddp_has_lseek_data_hole = false;
#endif
}
/*
* Concurrency: shouldn't matter.
*/
static int osd_sync(const struct lu_env *env, struct dt_device *d)
{
struct osd_device *osd = osd_dt_dev(d);
int slot = atomic64_read(&osd->od_last_txg) & OSD_TXG_MAP_MASK;
if (!d->dd_rdonly) {
struct osd_device *osd = osd_dt_dev(d);
CDEBUG(D_CACHE, "syncing OSD %s\n", LUSTRE_OSD_ZFS_NAME);
txg_wait_synced(dmu_objset_pool(osd->od_os), 0ULL);
CDEBUG(D_CACHE, "synced OSD %s\n", LUSTRE_OSD_ZFS_NAME);
}
io_wait_event(osd->od_commit_cb_waitq,
atomic_read(&osd->od_commit_cb_in_txg[slot]) == 0);
return 0;
}
static int osd_commit_async(const struct lu_env *env, struct dt_device *dev)
{
struct osd_device *osd = osd_dt_dev(dev);
tx_state_t *tx = &dmu_objset_pool(osd->od_os)->dp_tx;
uint64_t txg;
mutex_enter(&tx->tx_sync_lock);
txg = tx->tx_open_txg + 1;
if (tx->tx_quiesce_txg_waiting < txg) {
tx->tx_quiesce_txg_waiting = txg;
cv_broadcast(&tx->tx_quiesce_more_cv);
}
mutex_exit(&tx->tx_sync_lock);
return 0;
}
/*
* Concurrency: shouldn't matter.
*/
static int osd_ro(const struct lu_env *env, struct dt_device *d)
{
struct osd_device *osd = osd_dt_dev(d);
ENTRY;
CERROR("%s: *** setting device %s read-only ***\n",
osd->od_svname, LUSTRE_OSD_ZFS_NAME);
osd->od_dev_set_rdonly = 1;
spa_freeze(dmu_objset_spa(osd->od_os));
RETURN(0);
}
/* reserve or free quota for some operation */
static int osd_reserve_or_free_quota(const struct lu_env *env,
struct dt_device *dev,
struct lquota_id_info *qi)
{
struct osd_device *osd = osd_dt_dev(dev);
struct qsd_instance *qsd = NULL;
int rc;
ENTRY;
if (qi->lqi_is_blk)
qsd = osd->od_quota_slave_dt;
else
qsd = osd->od_quota_slave_md;
rc = qsd_reserve_or_free_quota(env, qsd, qi);
RETURN(rc);
}
static const struct dt_device_operations osd_dt_ops = {
.dt_root_get = osd_root_get,
.dt_statfs = osd_statfs,
.dt_trans_create = osd_trans_create,
.dt_trans_start = osd_trans_start,
.dt_trans_stop = osd_trans_stop,
.dt_trans_cb_add = osd_trans_cb_add,
.dt_conf_get = osd_conf_get,
.dt_sync = osd_sync,
.dt_commit_async = osd_commit_async,
.dt_ro = osd_ro,
.dt_reserve_or_free_quota = osd_reserve_or_free_quota,
.dt_last_seq_get = osd_last_seq_get,
};
static void *osd_key_init(const struct lu_context *ctx,
struct lu_context_key *key)
{
struct osd_thread_info *info;
OBD_ALLOC_PTR(info);
if (!info)
return ERR_PTR(-ENOMEM);
info->oti_env = container_of(ctx, struct lu_env, le_ctx);
#ifdef ZAP_MAXNAMELEN_NEW
info->oti_za.za_name_len = MAXNAMELEN;
info->oti_za2.za_name_len = MAXNAMELEN;
#endif
return info;
}
static void osd_key_fini(const struct lu_context *ctx,
struct lu_context_key *key, void *data)
{
struct osd_thread_info *info = data;
struct osd_idmap_cache *idc = info->oti_ins_cache;
if (info->oti_dio_pages) {
int i;
for (i = 0; i < PTLRPC_MAX_BRW_PAGES; i++) {
struct page *page = info->oti_dio_pages[i];
if (page) {
ClearPagePrivate2(page);
__free_page(page);
}
}
OBD_FREE_PTR_ARRAY_LARGE(info->oti_dio_pages,
PTLRPC_MAX_BRW_PAGES);
}
if (idc != NULL) {
LASSERT(info->oti_ins_cache_size > 0);
OBD_FREE_PTR_ARRAY_LARGE(idc, info->oti_ins_cache_size);
info->oti_ins_cache = NULL;
info->oti_ins_cache_size = 0;
}
lu_buf_free(&info->oti_xattr_lbuf);
OBD_FREE_PTR(info);
}
static void osd_key_exit(const struct lu_context *ctx,
struct lu_context_key *key, void *data)
{
struct osd_thread_info *info = data;
LASSERTF(info->oti_dio_pages_used == 0, "%d\n",
info->oti_dio_pages_used);
}
struct lu_context_key osd_key = {
.lct_tags = LCT_DT_THREAD | LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL,
.lct_init = osd_key_init,
.lct_fini = osd_key_fini,
.lct_exit = osd_key_exit
};
static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
{
ENTRY;
/* shutdown quota slave instance associated with the device */
if (o->od_quota_slave_md != NULL) {
/* complete all in-flight callbacks */
osd_sync(env, &o->od_dt_dev);
txg_wait_callbacks(spa_get_dsl(dmu_objset_spa(o->od_os)));
qsd_fini(env, o->od_quota_slave_md);
o->od_quota_slave_md = NULL;
}
if (o->od_quota_slave_dt != NULL) {
/* complete all in-flight callbacks */
osd_sync(env, &o->od_dt_dev);
txg_wait_callbacks(spa_get_dsl(dmu_objset_spa(o->od_os)));
qsd_fini(env, o->od_quota_slave_dt);
o->od_quota_slave_dt = NULL;
}
seq_target_fini(env, &o->od_dt_dev);
RETURN(0);
}
static void osd_xattr_changed_cb(void *arg, uint64_t newval)
{
struct osd_device *osd = arg;
osd->od_xattr_in_sa = (newval == ZFS_XATTR_SA);
}
static void osd_recordsize_changed_cb(void *arg, uint64_t newval)
{
struct osd_device *osd = arg;
LASSERT(newval <= spa_maxblocksize(dmu_objset_spa(osd->od_os)));
LASSERT(newval >= SPA_MINBLOCKSIZE);
LASSERT(ISP2(newval));
osd->od_max_blksz = newval;
}
static void osd_readonly_changed_cb(void *arg, uint64_t newval)
{
struct osd_device *osd = arg;
osd->od_prop_rdonly = !!newval;
}
static void osd_dnodesize_changed_cb(void *arg, uint64_t newval)
{
struct osd_device *osd = arg;
osd->od_dnsize = newval;
}
/*
* This function unregisters all registered callbacks. It's harmless to
* unregister callbacks that were never registered so it is used to safely
* unwind a partially completed call to osd_objset_register_callbacks().
*/
static void osd_objset_unregister_callbacks(struct osd_device *o)
{
struct dsl_dataset *ds = dmu_objset_ds(o->od_os);
(void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_XATTR),
osd_xattr_changed_cb, o);
(void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_RECORDSIZE),
osd_recordsize_changed_cb, o);
(void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_READONLY),
osd_readonly_changed_cb, o);
(void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_DNODESIZE),
osd_dnodesize_changed_cb, o);
if (o->arc_prune_cb != NULL) {
arc_remove_prune_callback(o->arc_prune_cb);
o->arc_prune_cb = NULL;
}
}
/*
* Register the required callbacks to be notified when zfs properties
* are modified using the 'zfs(8)' command line utility.
*/
static int osd_objset_register_callbacks(struct osd_device *o)
{
struct dsl_dataset *ds = dmu_objset_ds(o->od_os);
dsl_pool_t *dp = dmu_objset_pool(o->od_os);
int rc;
LASSERT(ds);
LASSERT(dp);
dsl_pool_config_enter(dp, FTAG);
rc = -dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_XATTR),
osd_xattr_changed_cb, o);
if (rc)
GOTO(err, rc);
rc = -dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_RECORDSIZE),
osd_recordsize_changed_cb, o);
if (rc)
GOTO(err, rc);
rc = -dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_READONLY),
osd_readonly_changed_cb, o);
if (rc)
GOTO(err, rc);
rc = -dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_DNODESIZE),
osd_dnodesize_changed_cb, o);
if (rc)
GOTO(err, rc);
o->arc_prune_cb = arc_add_prune_callback(arc_prune_func, o);
err:
dsl_pool_config_exit(dp, FTAG);
if (rc)
osd_objset_unregister_callbacks(o);
RETURN(rc);
}
static int osd_objset_open(struct osd_device *o)
{
uint64_t version = ZPL_VERSION;
uint64_t sa_obj, unlink_obj;
int rc;
ENTRY;
rc = -dmu_objset_own(o->od_mntdev, DMU_OST_ZFS,
o->od_dt_dev.dd_rdonly ? B_TRUE : B_FALSE,
B_TRUE, o, &o->od_os);
if (rc) {
CERROR("%s: can't open %s: rc = %d\n", o->od_svname,
o->od_mntdev, rc);
o->od_os = NULL;
GOTO(out, rc);
}
/* Check ZFS version */
rc = -zap_lookup(o->od_os, MASTER_NODE_OBJ,
ZPL_VERSION_STR, 8, 1, &version);
if (rc) {
rc = -EIO;
CERROR("%s: Error looking up ZPL VERSION: rc = %d\n",
o->od_mntdev, rc);
/*
* We can't return ENOENT because that would mean the objset
* didn't exist.
*/
GOTO(out, rc);
}
rc = -zap_lookup(o->od_os, MASTER_NODE_OBJ,
ZFS_SA_ATTRS, 8, 1, &sa_obj);
if (rc)
GOTO(out, rc);
rc = -sa_setup(o->od_os, sa_obj, zfs_attr_table,
ZPL_END, &o->z_attr_table);
if (rc)
GOTO(out, rc);
rc = -zap_lookup(o->od_os, MASTER_NODE_OBJ, ZFS_ROOT_OBJ,
8, 1, &o->od_rootid);
if (rc) {
CERROR("%s: lookup for root failed: rc = %d\n",
o->od_svname, rc);
GOTO(out, rc);
}
rc = -zap_lookup(o->od_os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET,
8, 1, &unlink_obj);
if (rc) {
CERROR("%s: lookup for %s failed: rc = %d\n",
o->od_svname, ZFS_UNLINKED_SET, rc);
GOTO(out, rc);
}
/* Check that user/group usage tracking is supported */
if (!dmu_objset_userused_enabled(o->od_os) ||
DMU_USERUSED_DNODE(o->od_os)->dn_type != DMU_OT_USERGROUP_USED ||
DMU_GROUPUSED_DNODE(o->od_os)->dn_type != DMU_OT_USERGROUP_USED) {
rc = -ENOTSUPP;
CERROR("%s: Space accounting not supported by this target, aborting: rc = %d\n",
o->od_svname, rc);
GOTO(out, rc);
}
rc = __osd_obj2dnode(o->od_os, unlink_obj, &o->od_unlinked);
if (rc) {
CERROR("%s: can't get dnode for unlinked: rc = %d\n",
o->od_svname, rc);
GOTO(out, rc);
}
out:
if (rc != 0 && o->od_os != NULL) {
dmu_objset_disown(o->od_os, B_TRUE, o);
o->od_os = NULL;
}
RETURN(rc);
}
int osd_unlinked_object_free(const struct lu_env *env, struct osd_device *osd,
uint64_t oid)
{
char *key = osd_oti_get(env)->oti_str;
int rc;
dmu_tx_t *tx;
if (osd->od_dt_dev.dd_rdonly) {
rc = -EROFS;
CERROR("%s: someone try to free objects under readonly mode, should be disabled: rc = %d\n",
osd_name(osd), rc);
dump_stack();
return rc;
}
rc = -dmu_free_long_range(osd->od_os, oid, 0, DMU_OBJECT_END);
if (rc != 0) {
CWARN("%s: Cannot truncate %llu: rc = %d\n",
osd->od_svname, oid, rc);
return rc;
}
tx = dmu_tx_create(osd->od_os);
dmu_tx_mark_netfree(tx);
dmu_tx_hold_free(tx, oid, 0, DMU_OBJECT_END);
osd_tx_hold_zap(tx, osd->od_unlinked->dn_object, osd->od_unlinked,
FALSE, NULL);
rc = -dmu_tx_assign(tx, DMU_TX_WAIT);
if (rc != 0) {
CWARN("%s: Cannot assign tx for %llu: rc = %d\n",
osd->od_svname, oid, rc);
goto failed;
}
snprintf(key, sizeof(osd_oti_get(env)->oti_str), "%llx", oid);
rc = osd_zap_remove(osd, osd->od_unlinked->dn_object,
osd->od_unlinked, key, tx);
if (rc != 0) {
CWARN("%s: Cannot remove %llu from unlinked set: rc = %d\n",
osd->od_svname, oid, rc);
goto failed;
}
rc = -dmu_object_free(osd->od_os, oid, tx);
if (rc != 0) {
CWARN("%s: Cannot free %llu: rc = %d\n",
osd->od_svname, oid, rc);
goto failed;
}
dmu_tx_commit(tx);
return 0;
failed:
LASSERT(rc != 0);
dmu_tx_abort(tx);
return rc;
}
static void
osd_unlinked_drain(const struct lu_env *env, struct osd_device *osd)
{
zap_cursor_t zc;
zap_attribute_t *za = &osd_oti_get(env)->oti_za;
zap_cursor_init(&zc, osd->od_os, osd->od_unlinked->dn_object);
while (zap_cursor_retrieve(&zc, za) == 0) {
/* If cannot free the object, leave it in the unlinked set,
* until the OSD is mounted again when obd_unlinked_drain()
* will be called.
*/
if (osd_unlinked_object_free(env, osd, za->za_first_integer))
break;
zap_cursor_advance(&zc);
}
zap_cursor_fini(&zc);
}
#ifndef HAVE_SPA_GET_MIN_ALLOC_RANGE
#include <sys/vdev_impl.h>
static void
spa_get_min_alloc_range(spa_t *spa, uint64_t *min_alloc, uint64_t *max_alloc)
{
#ifdef HAVE_VDEV_OP_MIN_ALLOC
vdev_t *rvd = spa->spa_root_vdev;
int i;
*min_alloc = spa->spa_min_alloc;
*max_alloc = *min_alloc;
for (i = 0; i < rvd->vdev_children; i++) {
vdev_t *vd = rvd->vdev_child[i];
vdev_ops_t *ops = vd->vdev_ops;
if (vd->vdev_islog || vd->vdev_ishole)
continue;
if (vd->vdev_alloc_bias != VDEV_BIAS_NONE)
continue;
if (ops && ops->vdev_op_min_alloc) {
uint64_t top_min_alloc = ops->vdev_op_min_alloc(vd);
if (top_min_alloc > *max_alloc)
*max_alloc = top_min_alloc;
}
}
#else
*min_alloc = SPA_MINBLOCKSIZE;
*max_alloc = SPA_MINBLOCKSIZE;
#endif /* HAVE_VDEV_OP_MIN_ALLOC */
}
#endif /* HAVE_SPA_GET_MIN_ALLOC_RANGE */
static int osd_mount(const struct lu_env *env,
struct osd_device *o, struct lustre_cfg *cfg)
{
char *mntdev = lustre_cfg_string(cfg, 1);
char *str = lustre_cfg_string(cfg, 2);
char *svname = lustre_cfg_string(cfg, 4);
time64_t interval = AS_DEFAULT;
uint64_t min_alloc, max_alloc;
dnode_t *rootdn;
const char *opts;
bool resetoi = false;
int rc;
ENTRY;
if (o->od_os != NULL)
RETURN(0);
if (mntdev == NULL || svname == NULL)
RETURN(-EINVAL);
rc = strscpy(o->od_mntdev, mntdev, sizeof(o->od_mntdev));
if (rc < 0)
RETURN(rc);
rc = strscpy(o->od_svname, svname, sizeof(o->od_svname));
if (rc < 0)
RETURN(rc);
opts = lustre_cfg_string(cfg, 3);
o->od_index_backup_stop = 0;
o->od_index = -1; /* -1 means index is invalid */
rc = server_name2index(o->od_svname, &o->od_index, NULL);
if (rc == LDD_F_SV_TYPE_OST)
o->od_is_ost = 1;
str = strstr(str, ":");
if (str) {
unsigned long flags;
rc = kstrtoul(str + 1, 10, &flags);
if (rc)
RETURN(-EINVAL);
if (test_bit(LMD_FLG_DEV_RDONLY, &flags)) {
o->od_dt_dev.dd_rdonly = 1;
LCONSOLE_WARN("%s: set dev_rdonly on this device\n",
svname);
}
if (test_bit(LMD_FLG_NOSCRUB, &flags))
interval = AS_NEVER;
}
rc = osd_objset_open(o);
if (rc)
RETURN(rc);
o->od_xattr_in_sa = B_TRUE;
o->od_max_blksz = spa_maxblocksize(o->od_os->os_spa);
spa_get_min_alloc_range(o->od_os->os_spa, &min_alloc, &max_alloc);
o->od_min_blksz = max_alloc;
o->od_readcache_max_filesize = OSD_MAX_CACHE_SIZE;
o->od_fzap_blockshift = OSD_FZAP_BLOCKSHIFT_DEFAULT;
rc = __osd_obj2dnode(o->od_os, o->od_rootid, &rootdn);
if (rc)
GOTO(err, rc);
o->od_root = rootdn->dn_object;
osd_dnode_rele(rootdn);
rc = __osd_obj2dnode(o->od_os, DMU_USERUSED_OBJECT,
&o->od_userused_dn);
if (rc)
GOTO(err, rc);
rc = __osd_obj2dnode(o->od_os, DMU_GROUPUSED_OBJECT,
&o->od_groupused_dn);
if (rc)
GOTO(err, rc);
#ifdef ZFS_PROJINHERIT
if (dmu_objset_projectquota_enabled(o->od_os)) {
rc = __osd_obj2dnode(o->od_os, DMU_PROJECTUSED_OBJECT,
&o->od_projectused_dn);
if (rc && rc != -ENOENT)
GOTO(err, rc);
}
#endif
rc = lu_site_init(&o->od_site, osd2lu_dev(o));
if (rc)
GOTO(err, rc);
o->od_site.ls_bottom_dev = osd2lu_dev(o);
rc = lu_site_init_finish(&o->od_site);
if (rc)
GOTO(err, rc);
rc = osd_objset_register_callbacks(o);
if (rc)
GOTO(err, rc);
if (opts && strstr(opts, "resetoi"))
resetoi = true;
rc = lprocfs_init_brw_stats(&o->od_brw_stats);
if (rc)
GOTO(err, rc);
o->od_brw_stats.bs_devname = o->od_svname;
o->od_in_init = 1;
rc = osd_scrub_setup(env, o, interval, resetoi);
o->od_in_init = 0;
if (rc)
GOTO(err, rc);
rc = osd_procfs_init(o, o->od_svname);
if (rc)
GOTO(err, rc);
/* currently it's no need to prepare qsd_instance_md for OST */
if (!o->od_is_ost) {
o->od_quota_slave_md = qsd_init(env, o->od_svname,
&o->od_dt_dev, o->od_proc_entry,
true, false);
if (IS_ERR(o->od_quota_slave_md)) {
rc = PTR_ERR(o->od_quota_slave_md);
o->od_quota_slave_md = NULL;
GOTO(err, rc);
}
}
o->od_quota_slave_dt = qsd_init(env, o->od_svname, &o->od_dt_dev,
o->od_proc_entry, false, false);
if (IS_ERR(o->od_quota_slave_dt)) {
if (o->od_quota_slave_md != NULL) {
qsd_fini(env, o->od_quota_slave_md);
o->od_quota_slave_md = NULL;
}
rc = PTR_ERR(o->od_quota_slave_dt);
o->od_quota_slave_dt = NULL;
GOTO(err, rc);
}
if (!osd_dmu_userobj_accounting_available(o))
CWARN("%s: dnode accounting not enabled: enable feature@userobj_accounting in pool\n",
o->od_mntdev);
/* parse mount option "noacl", and enable ACL by default */
if (opts == NULL || strstr(opts, "noacl") == NULL)
o->od_posix_acl = 1;
osd_unlinked_drain(env, o);
RETURN(0);
err:
RETURN(rc);
}
static void osd_umount(const struct lu_env *env, struct osd_device *o)
{
ENTRY;
if (atomic_read(&o->od_zerocopy_alloc))
CERROR("%s: lost %d allocated page(s)\n", o->od_svname,
atomic_read(&o->od_zerocopy_alloc));
if (atomic_read(&o->od_zerocopy_loan))
CERROR("%s: lost %d loaned abuf(s)\n", o->od_svname,
atomic_read(&o->od_zerocopy_loan));
if (atomic_read(&o->od_zerocopy_pin))
CERROR("%s: lost %d pinned dbuf(s)\n", o->od_svname,
atomic_read(&o->od_zerocopy_pin));
if (o->od_unlinked) {
osd_dnode_rele(o->od_unlinked);
o->od_unlinked = NULL;
}
if (o->od_userused_dn) {
osd_dnode_rele(o->od_userused_dn);
o->od_userused_dn = NULL;
}
if (o->od_groupused_dn) {
osd_dnode_rele(o->od_groupused_dn);
o->od_groupused_dn = NULL;
}
#ifdef ZFS_PROJINHERIT
if (o->od_projectused_dn) {
osd_dnode_rele(o->od_projectused_dn);
o->od_projectused_dn = NULL;
}
#endif
if (o->od_os != NULL) {
int slot;
if (!o->od_dt_dev.dd_rdonly)
/* force a txg sync to get all commit callbacks */
txg_wait_synced(dmu_objset_pool(o->od_os), 0ULL);
for (slot = 0; slot < OSD_TXG_MAP_SIZE; slot++)
io_wait_event(o->od_commit_cb_waitq,
!atomic_read(&o->od_commit_cb_in_txg[slot]));
/* close the object set */
dmu_objset_disown(o->od_os, B_TRUE, o);
o->od_os = NULL;
}
EXIT;
}
static int osd_device_init0(const struct lu_env *env,
struct osd_device *o,
struct lustre_cfg *cfg)
{
struct lu_device *l = osd2lu_dev(o);
int rc;
/* if the module was re-loaded, env can loose its keys */
rc = lu_env_refill((struct lu_env *) env);
if (rc)
GOTO(out, rc);
l->ld_ops = &osd_lu_ops;
o->od_dt_dev.dd_ops = &osd_dt_ops;
sema_init(&o->od_otable_sem, 1);
INIT_LIST_HEAD(&o->od_ios_list);
o->od_sync_on_lseek = B_TRUE;
/* ZFS does not support reporting nonrotional status yet, so this flag
* is only set if explicitly set by the user.
*/
o->od_nonrotational = 0;
out:
RETURN(rc);
}
static struct lu_device *osd_device_fini(const struct lu_env *env,
struct lu_device *d)
{
struct osd_device *o = osd_dev(d);
ENTRY;
osd_index_backup(env, o, false);
if (o->od_os) {
osd_objset_unregister_callbacks(o);
if (!o->od_dt_dev.dd_rdonly) {
osd_sync(env, lu2dt_dev(d));
txg_wait_callbacks(
spa_get_dsl(dmu_objset_spa(o->od_os)));
}
}
/* now with all the callbacks completed we can cleanup the remainings */
osd_shutdown(env, o);
osd_scrub_cleanup(env, o);
osd_procfs_fini(o);
if (o->od_os)
osd_umount(env, o);
RETURN(NULL);
}
static struct lu_device *osd_device_free(const struct lu_env *env,
struct lu_device *d)
{
struct osd_device *o = osd_dev(d);
ENTRY;
/* XXX: make osd top device in order to release reference */
if (d->ld_site) {
d->ld_site->ls_top_dev = d;
lu_site_purge(env, d->ld_site, -1);
lu_site_print(env, d->ld_site, &d->ld_site->ls_obj_hash.nelems,
D_ERROR, lu_cdebug_printer);
}
if (o->od_site.ls_bottom_dev)
lu_site_fini(&o->od_site);
dt_device_fini(&o->od_dt_dev);
OBD_FREE_PTR(o);
RETURN(NULL);
}
static struct lu_device *osd_device_alloc(const struct lu_env *env,
struct lu_device_type *type,
struct lustre_cfg *cfg)
{
struct osd_device *dev;
struct osd_seq_list *osl;
int rc;
OBD_ALLOC_PTR(dev);
if (dev == NULL)
return ERR_PTR(-ENOMEM);
osl = &dev->od_seq_list;
INIT_LIST_HEAD(&osl->osl_seq_list);
rwlock_init(&osl->osl_seq_list_lock);
sema_init(&osl->osl_seq_init_sem, 1);
INIT_LIST_HEAD(&dev->od_index_backup_list);
INIT_LIST_HEAD(&dev->od_index_restore_list);
spin_lock_init(&dev->od_lock);
dev->od_index_backup_policy = LIBP_NONE;
init_waitqueue_head(&dev->od_commit_cb_waitq);
rc = dt_device_init(&dev->od_dt_dev, type);
if (rc == 0) {
rc = osd_device_init0(env, dev, cfg);
if (rc == 0) {
rc = osd_mount(env, dev, cfg);
if (rc) {
osd_device_fini(env, osd2lu_dev(dev));
osd_device_free(env, osd2lu_dev(dev));
dev = NULL;
}
} else {
dt_device_fini(&dev->od_dt_dev);
}
}
if (unlikely(rc != 0) && dev)
OBD_FREE_PTR(dev);
return rc == 0 ? osd2lu_dev(dev) : ERR_PTR(rc);
}
static int osd_device_init(const struct lu_env *env, struct lu_device *d,
const char *name, struct lu_device *next)
{
return 0;
}
/*
* To be removed, setup is performed by osd_device_{init,alloc} and
* cleanup is performed by osd_device_{fini,free).
*/
static int osd_process_config(const struct lu_env *env,
struct lu_device *d, struct lustre_cfg *cfg)
{
struct osd_device *o = osd_dev(d);
ssize_t count;
int rc;
ENTRY;
switch (cfg->lcfg_command) {
case LCFG_SETUP:
rc = osd_mount(env, o, cfg);
break;
case LCFG_CLEANUP:
/* For the case LCFG_PRE_CLEANUP is not called in advance,
* that may happend if hit failure during mount process.
*/
osd_index_backup(env, o, false);
rc = osd_shutdown(env, o);
break;
case LCFG_PARAM: {
LASSERT(&o->od_dt_dev);
count = class_modify_config(cfg, PARAM_OSD,
&o->od_dt_dev.dd_kobj);
if (count < 0)
count = class_modify_config(cfg, PARAM_OST,
&o->od_dt_dev.dd_kobj);
rc = count > 0 ? 0 : count;
break;
}
case LCFG_PRE_CLEANUP:
osd_scrub_stop(o);
osd_index_backup(env, o,
o->od_index_backup_policy != LIBP_NONE);
rc = 0;
break;
default:
rc = -ENOTTY;
}
RETURN(rc);
}
static int osd_recovery_complete(const struct lu_env *env, struct lu_device *d)
{
struct osd_device *osd = osd_dev(d);
int rc = 0;
ENTRY;
if (osd->od_quota_slave_md == NULL && osd->od_quota_slave_dt == NULL)
RETURN(0);
/* start qsd instance on recovery completion, this notifies the quota
* slave code that we are about to process new requests now
*/
rc = qsd_start(env, osd->od_quota_slave_dt);
if (rc == 0 && osd->od_quota_slave_md != NULL)
rc = qsd_start(env, osd->od_quota_slave_md);
RETURN(rc);
}
/*
* we use exports to track all osd users
*/
static int osd_obd_connect(const struct lu_env *env, struct obd_export **exp,
struct obd_device *obd, struct obd_uuid *cluuid,
struct obd_connect_data *data, void *localdata)
{
struct osd_device *osd = osd_dev(obd->obd_lu_dev);
struct lustre_handle conn;
int rc;
ENTRY;
CDEBUG(D_CONFIG, "connect #%d\n", atomic_read(&osd->od_connects));
rc = class_connect(&conn, obd, cluuid);
if (rc)
RETURN(rc);
*exp = class_conn2export(&conn);
atomic_inc(&osd->od_connects);
RETURN(0);
}
/*
* once last export (we don't count self-export) disappeared
* osd can be released
*/
static int osd_obd_disconnect(struct obd_export *exp)
{
struct obd_device *obd = exp->exp_obd;
struct osd_device *osd = osd_dev(obd->obd_lu_dev);
int rc, release = 0;
ENTRY;
/* Only disconnect the underlying layers on the final disconnect. */
release = atomic_dec_and_test(&osd->od_connects);
rc = class_disconnect(exp); /* bz 9811 */
if (rc == 0 && release)
class_manual_cleanup(obd);
RETURN(rc);
}
static int osd_prepare(const struct lu_env *env, struct lu_device *pdev,
struct lu_device *dev)
{
struct osd_device *osd = osd_dev(dev);
int rc = 0;
ENTRY;
if (osd->od_quota_slave_md != NULL) {
/* set up quota slave objects */
rc = qsd_prepare(env, osd->od_quota_slave_md);
if (rc != 0)
RETURN(rc);
}
if (osd->od_quota_slave_dt != NULL) {
/* set up quota slave objects */
rc = qsd_prepare(env, osd->od_quota_slave_dt);
if (rc != 0)
RETURN(rc);
}
rc = seq_target_init(env, &osd->od_dt_dev, osd->od_svname,
osd->od_is_ost);
RETURN(rc);
}
const struct lu_device_operations osd_lu_ops = {
.ldo_object_alloc = osd_object_alloc,
.ldo_process_config = osd_process_config,
.ldo_recovery_complete = osd_recovery_complete,
.ldo_prepare = osd_prepare,
.ldo_fid_alloc = fid_alloc_generic,
};
LU_TYPE_INIT_FINI(osd, &osd_key);
static const struct lu_device_type_operations osd_device_type_ops = {
.ldto_init = osd_type_init,
.ldto_fini = osd_type_fini,
.ldto_start = osd_type_start,
.ldto_stop = osd_type_stop,
.ldto_device_alloc = osd_device_alloc,
.ldto_device_free = osd_device_free,
.ldto_device_init = osd_device_init,
.ldto_device_fini = osd_device_fini
};
static struct lu_device_type osd_device_type = {
.ldt_tags = LU_DEVICE_DT,
.ldt_name = LUSTRE_OSD_ZFS_NAME,
.ldt_ops = &osd_device_type_ops,
.ldt_ctx_tags = LCT_LOCAL
};
static const struct obd_ops osd_obd_device_ops = {
.o_owner = THIS_MODULE,
.o_connect = osd_obd_connect,
.o_disconnect = osd_obd_disconnect,
};
static int __init osd_init(void)
{
int rc;
rc = libcfs_setup();
if (rc)
return rc;
rc = osd_options_init();
if (rc)
return rc;
rc = lu_kmem_init(osd_caches);
if (rc)
return rc;
rc = class_register_type(&osd_obd_device_ops, NULL, true,
LUSTRE_OSD_ZFS_NAME, &osd_device_type);
if (rc)
lu_kmem_fini(osd_caches);
return rc;
}
static void __exit osd_exit(void)
{
class_unregister_type(LUSTRE_OSD_ZFS_NAME);
lu_kmem_fini(osd_caches);
}
module_param(osd_oi_count, int, 0444);
MODULE_PARM_DESC(osd_oi_count, "Number of Object Index containers to be created, it's only valid for new filesystem.");
module_param(osd_txg_sync_delay_us, int, 0644);
MODULE_PARM_DESC(osd_txg_sync_delay_us,
"When zero or larger delay N usec instead of doing TXG sync");
MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_ZFS_NAME")");
MODULE_VERSION(LUSTRE_VERSION_STRING);
MODULE_LICENSE("GPL");
late_initcall_sync(osd_init);
module_exit(osd_exit);
