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ZAP: Massively switch to _by_dnode() interfaces

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Before this change ZAP called dnode_hold() for almost every block
access, that was clearly visible in profiler under heavy load, such
as BRT.  This patch makes it always hold the dnode reference between
zap_lockdir() and zap_unlockdir().  It allows to avoid most of dnode
operations between those.  It also adds several new _by_dnode() APIs
to ZAP and uses them in BRT code.  Also adds dmu_prefetch_by_dnode()
variant and uses it in the ZAP code.

After this there remains only one call to dmu_buf_dnode_enter(),
which seems to be unneeded.  So remove the call and the functions.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Closes #15951
This commit is contained in:
Alexander Motin 2024-03-25 17:58:50 -04:00 committed by Brian Behlendorf
parent fdd8c0aea1
commit 19bf54b764
9 changed files with 202 additions and 172 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/sys/dmu.h
View File

@ -739,8 +739,6 @@ void *dmu_buf_remove_user(dmu_buf_t *db, dmu_buf_user_t *user);
void *dmu_buf_get_user(dmu_buf_t *db);
objset_t *dmu_buf_get_objset(dmu_buf_t *db);
dnode_t *dmu_buf_dnode_enter(dmu_buf_t *db);
void dmu_buf_dnode_exit(dmu_buf_t *db);
/* Block until any in-progress dmu buf user evictions complete. */
void dmu_buf_user_evict_wait(void);
@ -889,6 +887,8 @@ extern uint_t zfs_max_recordsize;
*/
void dmu_prefetch(objset_t *os, uint64_t object, int64_t level, uint64_t offset,
uint64_t len, enum zio_priority pri);
void dmu_prefetch_by_dnode(dnode_t *dn, int64_t level, uint64_t offset,
uint64_t len, enum zio_priority pri);
void dmu_prefetch_dnode(objset_t *os, uint64_t object, enum zio_priority pri);
typedef struct dmu_object_info {

8
include/sys/zap.h
View File

@ -253,6 +253,9 @@ int zap_add_by_dnode(dnode_t *dn, const char *key,
int zap_add_uint64(objset_t *ds, uint64_t zapobj, const uint64_t *key,
int key_numints, int integer_size, uint64_t num_integers,
const void *val, dmu_tx_t *tx);
int zap_add_uint64_by_dnode(dnode_t *dn, const uint64_t *key,
int key_numints, int integer_size, uint64_t num_integers,
const void *val, dmu_tx_t *tx);
/*
* Set the attribute with the given name to the given value. If an
@ -267,6 +270,9 @@ int zap_update(objset_t *ds, uint64_t zapobj, const char *name,
int zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
int key_numints,
int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx);
int zap_update_uint64_by_dnode(dnode_t *dn, const uint64_t *key,
int key_numints,
int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx);
/*
* Get the length (in integers) and the integer size of the specified
@ -292,6 +298,8 @@ int zap_remove_norm(objset_t *ds, uint64_t zapobj, const char *name,
int zap_remove_by_dnode(dnode_t *dn, const char *name, dmu_tx_t *tx);
int zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
int key_numints, dmu_tx_t *tx);
int zap_remove_uint64_by_dnode(dnode_t *dn, const uint64_t *key,
int key_numints, dmu_tx_t *tx);
/*
* Returns (in *count) the number of attributes in the specified zap

1
include/sys/zap_impl.h
View File

@ -145,6 +145,7 @@ typedef struct zap {
dmu_buf_user_t zap_dbu;
objset_t *zap_objset;
uint64_t zap_object;
dnode_t *zap_dnode;
struct dmu_buf *zap_dbuf;
krwlock_t zap_rwlock;
boolean_t zap_ismicro;

72
module/zfs/brt.c
View File

@ -955,52 +955,10 @@ brt_entry_prefetch(brt_t *brt, uint64_t vdevid, brt_entry_t *bre)
if (mos_entries == 0)
return;
BRT_DEBUG("ZAP prefetch: object=%llu vdev=%llu offset=%llu",
(u_longlong_t)mos_entries, (u_longlong_t)vdevid,
(u_longlong_t)bre->bre_offset);
(void) zap_prefetch_uint64(brt->brt_mos, mos_entries,
(uint64_t *)&bre->bre_offset, BRT_KEY_WORDS);
}
static int
brt_entry_update(brt_t *brt, brt_vdev_t *brtvd, brt_entry_t *bre, dmu_tx_t *tx)
{
int error;
ASSERT(RW_LOCK_HELD(&brt->brt_lock));
ASSERT(brtvd->bv_mos_entries != 0);
ASSERT(bre->bre_refcount > 0);
error = zap_update_uint64(brt->brt_mos, brtvd->bv_mos_entries,
(uint64_t *)&bre->bre_offset, BRT_KEY_WORDS, 1,
sizeof (bre->bre_refcount), &bre->bre_refcount, tx);
BRT_DEBUG("ZAP update: object=%llu vdev=%llu offset=%llu count=%llu "
"error=%d", (u_longlong_t)brtvd->bv_mos_entries,
(u_longlong_t)brtvd->bv_vdevid, (u_longlong_t)bre->bre_offset,
(u_longlong_t)bre->bre_refcount, error);
return (error);
}
static int
brt_entry_remove(brt_t *brt, brt_vdev_t *brtvd, brt_entry_t *bre, dmu_tx_t *tx)
{
int error;
ASSERT(RW_LOCK_HELD(&brt->brt_lock));
ASSERT(brtvd->bv_mos_entries != 0);
ASSERT0(bre->bre_refcount);
error = zap_remove_uint64(brt->brt_mos, brtvd->bv_mos_entries,
(uint64_t *)&bre->bre_offset, BRT_KEY_WORDS, tx);
BRT_DEBUG("ZAP remove: object=%llu vdev=%llu offset=%llu count=%llu "
"error=%d", (u_longlong_t)brtvd->bv_mos_entries,
(u_longlong_t)brtvd->bv_vdevid, (u_longlong_t)bre->bre_offset,
(u_longlong_t)bre->bre_refcount, error);
return (error);
}
/*
* Return TRUE if we _can_ have BRT entry for this bp. It might be false
* positive, but gives us quick answer if we should look into BRT, which
@ -1559,24 +1517,16 @@ brt_pending_apply(spa_t *spa, uint64_t txg)
}
static void
brt_sync_entry(brt_t *brt, brt_vdev_t *brtvd, brt_entry_t *bre, dmu_tx_t *tx)
brt_sync_entry(dnode_t *dn, brt_entry_t *bre, dmu_tx_t *tx)
{
ASSERT(RW_WRITE_HELD(&brt->brt_lock));
ASSERT(brtvd->bv_mos_entries != 0);
if (bre->bre_refcount == 0) {
int error;
error = brt_entry_remove(brt, brtvd, bre, tx);
ASSERT(error == 0 || error == ENOENT);
/*
* If error == ENOENT then zfs_clone_range() was done from a
* removed (but opened) file (open(), unlink()).
*/
ASSERT(brt_entry_lookup(brt, brtvd, bre) == ENOENT);
int error = zap_remove_uint64_by_dnode(dn, &bre->bre_offset,
BRT_KEY_WORDS, tx);
VERIFY(error == 0 || error == ENOENT);
} else {
VERIFY0(brt_entry_update(brt, brtvd, bre, tx));
VERIFY0(zap_update_uint64_by_dnode(dn, &bre->bre_offset,
BRT_KEY_WORDS, 1, sizeof (bre->bre_refcount),
&bre->bre_refcount, tx));
}
}
@ -1585,6 +1535,7 @@ brt_sync_table(brt_t *brt, dmu_tx_t *tx)
{
brt_vdev_t *brtvd;
brt_entry_t *bre;
dnode_t *dn;
uint64_t vdevid;
void *c;
@ -1608,14 +1559,19 @@ brt_sync_table(brt_t *brt, dmu_tx_t *tx)
if (brtvd->bv_mos_brtvdev == 0)
brt_vdev_create(brt, brtvd, tx);
VERIFY0(dnode_hold(brt->brt_mos, brtvd->bv_mos_entries,
FTAG, &dn));
c = NULL;
while ((bre = avl_destroy_nodes(&brtvd->bv_tree, &c)) != NULL) {
brt_sync_entry(brt, brtvd, bre, tx);
brt_sync_entry(dn, bre, tx);
brt_entry_free(bre);
ASSERT(brt->brt_nentries > 0);
brt->brt_nentries--;
}
dnode_rele(dn, FTAG);
brt_vdev_sync(brt, brtvd, tx);
if (brtvd->bv_totalcount == 0)

15
module/zfs/dbuf.c
View File

@ -4127,21 +4127,6 @@ dmu_buf_get_objset(dmu_buf_t *db)
return (dbi->db_objset);
}
dnode_t *
dmu_buf_dnode_enter(dmu_buf_t *db)
{
dmu_buf_impl_t *dbi = (dmu_buf_impl_t *)db;
DB_DNODE_ENTER(dbi);
return (DB_DNODE(dbi));
}
void
dmu_buf_dnode_exit(dmu_buf_t *db)
{
dmu_buf_impl_t *dbi = (dmu_buf_impl_t *)db;
DB_DNODE_EXIT(dbi);
}
static void
dbuf_check_blkptr(dnode_t *dn, dmu_buf_impl_t *db)
{

18
module/zfs/dmu.c
View File

@ -712,8 +712,6 @@ dmu_prefetch(objset_t *os, uint64_t object, int64_t level, uint64_t offset,
uint64_t len, zio_priority_t pri)
{
dnode_t *dn;
int64_t level2 = level;
uint64_t start, end, start2, end2;
if (dmu_prefetch_max == 0 || len == 0) {
dmu_prefetch_dnode(os, object, pri);
@ -723,6 +721,18 @@ dmu_prefetch(objset_t *os, uint64_t object, int64_t level, uint64_t offset,
if (dnode_hold(os, object, FTAG, &dn) != 0)
return;
dmu_prefetch_by_dnode(dn, level, offset, len, pri);
dnode_rele(dn, FTAG);
}
void
dmu_prefetch_by_dnode(dnode_t *dn, int64_t level, uint64_t offset,
uint64_t len, zio_priority_t pri)
{
int64_t level2 = level;
uint64_t start, end, start2, end2;
/*
* Depending on len we may do two prefetches: blocks [start, end) at
* level, and following blocks [start2, end2) at higher level2.
@ -762,8 +772,6 @@ dmu_prefetch(objset_t *os, uint64_t object, int64_t level, uint64_t offset,
for (uint64_t i = start2; i < end2; i++)
dbuf_prefetch(dn, level2, i, pri, 0);
rw_exit(&dn->dn_struct_rwlock);
dnode_rele(dn, FTAG);
}
/*
@ -2563,6 +2571,8 @@ EXPORT_SYMBOL(dmu_bonus_hold_by_dnode);
EXPORT_SYMBOL(dmu_buf_hold_array_by_bonus);
EXPORT_SYMBOL(dmu_buf_rele_array);
EXPORT_SYMBOL(dmu_prefetch);
EXPORT_SYMBOL(dmu_prefetch_by_dnode);
EXPORT_SYMBOL(dmu_prefetch_dnode);
EXPORT_SYMBOL(dmu_free_range);
EXPORT_SYMBOL(dmu_free_long_range);
EXPORT_SYMBOL(dmu_free_long_object);

7
module/zfs/dmu_recv.c
View File

@ -2353,7 +2353,6 @@ receive_process_write_record(struct receive_writer_arg *rwa,
if (rwa->heal) {
blkptr_t *bp;
dmu_buf_t *dbp;
dnode_t *dn;
int flags = DB_RF_CANFAIL;
if (rwa->raw)
@ -2385,19 +2384,15 @@ receive_process_write_record(struct receive_writer_arg *rwa,
dmu_buf_rele(dbp, FTAG);
return (err);
}
dn = dmu_buf_dnode_enter(dbp);
/* Make sure the on-disk block and recv record sizes match */
if (drrw->drr_logical_size !=
dn->dn_datablkszsec << SPA_MINBLOCKSHIFT) {
if (drrw->drr_logical_size != dbp->db_size) {
err = ENOTSUP;
dmu_buf_dnode_exit(dbp);
dmu_buf_rele(dbp, FTAG);
return (err);
}
/* Get the block pointer for the corrupted block */
bp = dmu_buf_get_blkptr(dbp);
err = do_corrective_recv(rwa, drrw, rrd, bp);
dmu_buf_dnode_exit(dbp);
dmu_buf_rele(dbp, FTAG);
return (err);
}

43
module/zfs/zap.c
View File

@ -133,7 +133,7 @@ fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags)
* set up block 1 - the first leaf
*/
dmu_buf_t *db;
VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object,
VERIFY0(dmu_buf_hold_by_dnode(zap->zap_dnode,
1<<FZAP_BLOCK_SHIFT(zap), FTAG, &db, DMU_READ_NO_PREFETCH));
dmu_buf_will_dirty(db, tx);
@ -182,7 +182,7 @@ zap_table_grow(zap_t *zap, zap_table_phys_t *tbl,
newblk = zap_allocate_blocks(zap, tbl->zt_numblks * 2);
tbl->zt_nextblk = newblk;
ASSERT0(tbl->zt_blks_copied);
dmu_prefetch(zap->zap_objset, zap->zap_object, 0,
dmu_prefetch_by_dnode(zap->zap_dnode, 0,
tbl->zt_blk << bs, tbl->zt_numblks << bs,
ZIO_PRIORITY_SYNC_READ);
}
@ -193,21 +193,21 @@ zap_table_grow(zap_t *zap, zap_table_phys_t *tbl,
uint64_t b = tbl->zt_blks_copied;
dmu_buf_t *db_old;
int err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
int err = dmu_buf_hold_by_dnode(zap->zap_dnode,
(tbl->zt_blk + b) << bs, FTAG, &db_old, DMU_READ_NO_PREFETCH);
if (err != 0)
return (err);
/* first half of entries in old[b] go to new[2*b+0] */
dmu_buf_t *db_new;
VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object,
VERIFY0(dmu_buf_hold_by_dnode(zap->zap_dnode,
(newblk + 2*b+0) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH));
dmu_buf_will_dirty(db_new, tx);
transfer_func(db_old->db_data, db_new->db_data, hepb);
dmu_buf_rele(db_new, FTAG);
/* second half of entries in old[b] go to new[2*b+1] */
VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object,
VERIFY0(dmu_buf_hold_by_dnode(zap->zap_dnode,
(newblk + 2*b+1) << bs, FTAG, &db_new, DMU_READ_NO_PREFETCH));
dmu_buf_will_dirty(db_new, tx);
transfer_func((uint64_t *)db_old->db_data + hepb,
@ -255,7 +255,7 @@ zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val,
uint64_t off = idx & ((1<<(bs-3))-1);
dmu_buf_t *db;
int err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
int err = dmu_buf_hold_by_dnode(zap->zap_dnode,
(tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH);
if (err != 0)
return (err);
@ -267,7 +267,7 @@ zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val,
uint64_t off2 = idx2 & ((1<<(bs-3))-1);
dmu_buf_t *db2;
err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
err = dmu_buf_hold_by_dnode(zap->zap_dnode,
(tbl->zt_nextblk + blk2) << bs, FTAG, &db2,
DMU_READ_NO_PREFETCH);
if (err != 0) {
@ -296,16 +296,9 @@ zap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp)
uint64_t blk = idx >> (bs-3);
uint64_t off = idx & ((1<<(bs-3))-1);
/*
* Note: this is equivalent to dmu_buf_hold(), but we use
* _dnode_enter / _by_dnode because it's faster because we don't
* have to hold the dnode.
*/
dnode_t *dn = dmu_buf_dnode_enter(zap->zap_dbuf);
dmu_buf_t *db;
int err = dmu_buf_hold_by_dnode(dn,
int err = dmu_buf_hold_by_dnode(zap->zap_dnode,
(tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH);
dmu_buf_dnode_exit(zap->zap_dbuf);
if (err != 0)
return (err);
*valp = ((uint64_t *)db->db_data)[off];
@ -319,11 +312,9 @@ zap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp)
*/
blk = (idx*2) >> (bs-3);
dn = dmu_buf_dnode_enter(zap->zap_dbuf);
err = dmu_buf_hold_by_dnode(dn,
err = dmu_buf_hold_by_dnode(zap->zap_dnode,
(tbl->zt_nextblk + blk) << bs, FTAG, &db,
DMU_READ_NO_PREFETCH);
dmu_buf_dnode_exit(zap->zap_dbuf);
if (err == 0)
dmu_buf_rele(db, FTAG);
}
@ -368,7 +359,7 @@ zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx)
uint64_t newblk = zap_allocate_blocks(zap, 1);
dmu_buf_t *db_new;
int err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
int err = dmu_buf_hold_by_dnode(zap->zap_dnode,
newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new,
DMU_READ_NO_PREFETCH);
if (err != 0)
@ -433,7 +424,7 @@ zap_create_leaf(zap_t *zap, dmu_tx_t *tx)
l->l_blkid = zap_allocate_blocks(zap, 1);
l->l_dbuf = NULL;
VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object,
VERIFY0(dmu_buf_hold_by_dnode(zap->zap_dnode,
l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf,
DMU_READ_NO_PREFETCH));
dmu_buf_init_user(&l->l_dbu, zap_leaf_evict_sync, NULL, &l->l_dbuf);
@ -533,10 +524,8 @@ zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt,
return (SET_ERROR(ENOENT));
int bs = FZAP_BLOCK_SHIFT(zap);
dnode_t *dn = dmu_buf_dnode_enter(zap->zap_dbuf);
int err = dmu_buf_hold_by_dnode(dn,
int err = dmu_buf_hold_by_dnode(zap->zap_dnode,
blkid << bs, NULL, &db, DMU_READ_NO_PREFETCH);
dmu_buf_dnode_exit(zap->zap_dbuf);
if (err != 0)
return (err);
@ -985,7 +974,7 @@ fzap_prefetch(zap_name_t *zn)
if (zap_idx_to_blk(zap, idx, &blk) != 0)
return;
int bs = FZAP_BLOCK_SHIFT(zap);
dmu_prefetch(zap->zap_objset, zap->zap_object, 0, blk << bs, 1 << bs,
dmu_prefetch_by_dnode(zap->zap_dnode, 0, blk << bs, 1 << bs,
ZIO_PRIORITY_SYNC_READ);
}
@ -1228,7 +1217,7 @@ fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za)
*/
if (zc->zc_hash == 0 && zap_iterate_prefetch &&
zc->zc_prefetch && zap_f_phys(zap)->zap_freeblk > 2) {
dmu_prefetch(zc->zc_objset, zc->zc_zapobj, 0, 0,
dmu_prefetch_by_dnode(zap->zap_dnode, 0, 0,
zap_f_phys(zap)->zap_freeblk << FZAP_BLOCK_SHIFT(zap),
ZIO_PRIORITY_ASYNC_READ);
}
@ -1356,7 +1345,7 @@ fzap_get_stats(zap_t *zap, zap_stats_t *zs)
zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0),
1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs);
} else {
dmu_prefetch(zap->zap_objset, zap->zap_object, 0,
dmu_prefetch_by_dnode(zap->zap_dnode, 0,
zap_f_phys(zap)->zap_ptrtbl.zt_blk << bs,
zap_f_phys(zap)->zap_ptrtbl.zt_numblks << bs,
ZIO_PRIORITY_SYNC_READ);
@ -1366,7 +1355,7 @@ fzap_get_stats(zap_t *zap, zap_stats_t *zs)
dmu_buf_t *db;
int err;
err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
err = dmu_buf_hold_by_dnode(zap->zap_dnode,
(zap_f_phys(zap)->zap_ptrtbl.zt_blk + b) << bs,
FTAG, &db, DMU_READ_NO_PREFETCH);
if (err == 0) {

206
module/zfs/zap_micro.c
View File

@ -415,7 +415,7 @@ mze_destroy(zap_t *zap)
}
static zap_t *
mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db)
mzap_open(dmu_buf_t *db)
{
zap_t *winner;
uint64_t *zap_hdr = (uint64_t *)db->db_data;
@ -427,8 +427,8 @@ mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db)
zap_t *zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP);
rw_init(&zap->zap_rwlock, NULL, RW_DEFAULT, NULL);
rw_enter(&zap->zap_rwlock, RW_WRITER);
zap->zap_objset = os;
zap->zap_object = obj;
zap->zap_objset = dmu_buf_get_objset(db);
zap->zap_object = db->db_object;
zap->zap_dbuf = db;
if (zap_block_type != ZBT_MICRO) {
@ -518,7 +518,7 @@ handle_winner:
* have the specified tag.
*/
static int
zap_lockdir_impl(dmu_buf_t *db, const void *tag, dmu_tx_t *tx,
zap_lockdir_impl(dnode_t *dn, dmu_buf_t *db, const void *tag, dmu_tx_t *tx,
krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp)
{
ASSERT0(db->db_offset);
@ -528,13 +528,13 @@ zap_lockdir_impl(dmu_buf_t *db, const void *tag, dmu_tx_t *tx,
*zapp = NULL;
dmu_object_info_from_db(db, &doi);
dmu_object_info_from_dnode(dn, &doi);
if (DMU_OT_BYTESWAP(doi.doi_type) != DMU_BSWAP_ZAP)
return (SET_ERROR(EINVAL));
zap_t *zap = dmu_buf_get_user(db);
if (zap == NULL) {
zap = mzap_open(os, obj, db);
zap = mzap_open(db);
if (zap == NULL) {
/*
* mzap_open() didn't like what it saw on-disk.
@ -563,6 +563,7 @@ zap_lockdir_impl(dmu_buf_t *db, const void *tag, dmu_tx_t *tx,
}
zap->zap_objset = os;
zap->zap_dnode = dn;
if (lt == RW_WRITER)
dmu_buf_will_dirty(db, tx);
@ -598,23 +599,16 @@ zap_lockdir_by_dnode(dnode_t *dn, dmu_tx_t *tx,
zap_t **zapp)
{
dmu_buf_t *db;
int err;
int err = dmu_buf_hold_by_dnode(dn, 0, tag, &db, DMU_READ_NO_PREFETCH);
if (err != 0) {
err = dmu_buf_hold_by_dnode(dn, 0, tag, &db, DMU_READ_NO_PREFETCH);
if (err != 0)
return (err);
}
#ifdef ZFS_DEBUG
{
dmu_object_info_t doi;
dmu_object_info_from_db(db, &doi);
ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP);
}
#endif
err = zap_lockdir_impl(db, tag, tx, lti, fatreader, adding, zapp);
if (err != 0) {
err = zap_lockdir_impl(dn, db, tag, tx, lti, fatreader, adding, zapp);
if (err != 0)
dmu_buf_rele(db, tag);
}
else
VERIFY(dnode_add_ref(dn, tag));
return (err);
}
@ -623,21 +617,23 @@ zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx,
krw_t lti, boolean_t fatreader, boolean_t adding, const void *tag,
zap_t **zapp)
{
dnode_t *dn;
dmu_buf_t *db;
int err;
int err = dmu_buf_hold(os, obj, 0, tag, &db, DMU_READ_NO_PREFETCH);
err = dnode_hold(os, obj, tag, &dn);
if (err != 0)
return (err);
#ifdef ZFS_DEBUG
{
dmu_object_info_t doi;
dmu_object_info_from_db(db, &doi);
ASSERT3U(DMU_OT_BYTESWAP(doi.doi_type), ==, DMU_BSWAP_ZAP);
err = dmu_buf_hold_by_dnode(dn, 0, tag, &db, DMU_READ_NO_PREFETCH);
if (err != 0) {
dnode_rele(dn, tag);
return (err);
}
#endif
err = zap_lockdir_impl(db, tag, tx, lti, fatreader, adding, zapp);
if (err != 0)
err = zap_lockdir_impl(dn, db, tag, tx, lti, fatreader, adding, zapp);
if (err != 0) {
dmu_buf_rele(db, tag);
dnode_rele(dn, tag);
}
return (err);
}
@ -645,6 +641,7 @@ void
zap_unlockdir(zap_t *zap, const void *tag)
{
rw_exit(&zap->zap_rwlock);
dnode_rele(zap->zap_dnode, tag);
dmu_buf_rele(zap->zap_dbuf, tag);
}
@ -730,7 +727,8 @@ mzap_create_impl(dnode_t *dn, int normflags, zap_flags_t flags, dmu_tx_t *tx)
if (flags != 0) {
zap_t *zap;
/* Only fat zap supports flags; upgrade immediately. */
VERIFY0(zap_lockdir_impl(db, FTAG, tx, RW_WRITER,
VERIFY(dnode_add_ref(dn, FTAG));
VERIFY0(zap_lockdir_impl(dn, db, FTAG, tx, RW_WRITER,
B_FALSE, B_FALSE, &zap));
VERIFY0(mzap_upgrade(&zap, FTAG, tx, flags));
zap_unlockdir(zap, FTAG);
@ -1325,6 +1323,26 @@ zap_add_by_dnode(dnode_t *dn, const char *key,
return (err);
}
static int
zap_add_uint64_impl(zap_t *zap, const uint64_t *key,
int key_numints, int integer_size, uint64_t num_integers,
const void *val, dmu_tx_t *tx, const void *tag)
{
int err;
zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints);
if (zn == NULL) {
zap_unlockdir(zap, tag);
return (SET_ERROR(ENOTSUP));
}
err = fzap_add(zn, integer_size, num_integers, val, tag, tx);
zap = zn->zn_zap; /* fzap_add() may change zap */
zap_name_free(zn);
if (zap != NULL) /* may be NULL if fzap_add() failed */
zap_unlockdir(zap, tag);
return (err);
}
int
zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
int key_numints, int integer_size, uint64_t num_integers,
@ -1336,16 +1354,26 @@ zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap);
if (err != 0)
return (err);
zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints);
if (zn == NULL) {
zap_unlockdir(zap, FTAG);
return (SET_ERROR(ENOTSUP));
}
err = fzap_add(zn, integer_size, num_integers, val, FTAG, tx);
zap = zn->zn_zap; /* fzap_add() may change zap */
zap_name_free(zn);
if (zap != NULL) /* may be NULL if fzap_add() failed */
zap_unlockdir(zap, FTAG);
err = zap_add_uint64_impl(zap, key, key_numints,
integer_size, num_integers, val, tx, FTAG);
/* zap_add_uint64_impl() calls zap_unlockdir() */
return (err);
}
int
zap_add_uint64_by_dnode(dnode_t *dn, const uint64_t *key,
int key_numints, int integer_size, uint64_t num_integers,
const void *val, dmu_tx_t *tx)
{
zap_t *zap;
int err =
zap_lockdir_by_dnode(dn, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap);
if (err != 0)
return (err);
err = zap_add_uint64_impl(zap, key, key_numints,
integer_size, num_integers, val, tx, FTAG);
/* zap_add_uint64_impl() calls zap_unlockdir() */
return (err);
}
@ -1396,10 +1424,30 @@ zap_update(objset_t *os, uint64_t zapobj, const char *name,
return (err);
}
static int
zap_update_uint64_impl(zap_t *zap, const uint64_t *key, int key_numints,
int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx,
const void *tag)
{
int err;
zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints);
if (zn == NULL) {
zap_unlockdir(zap, tag);
return (SET_ERROR(ENOTSUP));
}
err = fzap_update(zn, integer_size, num_integers, val, tag, tx);
zap = zn->zn_zap; /* fzap_update() may change zap */
zap_name_free(zn);
if (zap != NULL) /* may be NULL if fzap_upgrade() failed */
zap_unlockdir(zap, tag);
return (err);
}
int
zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
int key_numints,
int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx)
int key_numints, int integer_size, uint64_t num_integers, const void *val,
dmu_tx_t *tx)
{
zap_t *zap;
@ -1407,16 +1455,25 @@ zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap);
if (err != 0)
return (err);
zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints);
if (zn == NULL) {
zap_unlockdir(zap, FTAG);
return (SET_ERROR(ENOTSUP));
}
err = fzap_update(zn, integer_size, num_integers, val, FTAG, tx);
zap = zn->zn_zap; /* fzap_update() may change zap */
zap_name_free(zn);
if (zap != NULL) /* may be NULL if fzap_upgrade() failed */
zap_unlockdir(zap, FTAG);
err = zap_update_uint64_impl(zap, key, key_numints,
integer_size, num_integers, val, tx, FTAG);
/* zap_update_uint64_impl() calls zap_unlockdir() */
return (err);
}
int
zap_update_uint64_by_dnode(dnode_t *dn, const uint64_t *key, int key_numints,
int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx)
{
zap_t *zap;
int err =
zap_lockdir_by_dnode(dn, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap);
if (err != 0)
return (err);
err = zap_update_uint64_impl(zap, key, key_numints,
integer_size, num_integers, val, tx, FTAG);
/* zap_update_uint64_impl() calls zap_unlockdir() */
return (err);
}
@ -1481,6 +1538,23 @@ zap_remove_by_dnode(dnode_t *dn, const char *name, dmu_tx_t *tx)
return (err);
}
static int
zap_remove_uint64_impl(zap_t *zap, const uint64_t *key, int key_numints,
dmu_tx_t *tx, const void *tag)
{
int err;
zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints);
if (zn == NULL) {
zap_unlockdir(zap, tag);
return (SET_ERROR(ENOTSUP));
}
err = fzap_remove(zn, tx);
zap_name_free(zn);
zap_unlockdir(zap, tag);
return (err);
}
int
zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
int key_numints, dmu_tx_t *tx)
@ -1491,14 +1565,23 @@ zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key,
zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap);
if (err != 0)
return (err);
zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints);
if (zn == NULL) {
zap_unlockdir(zap, FTAG);
return (SET_ERROR(ENOTSUP));
}
err = fzap_remove(zn, tx);
zap_name_free(zn);
zap_unlockdir(zap, FTAG);
err = zap_remove_uint64_impl(zap, key, key_numints, tx, FTAG);
/* zap_remove_uint64_impl() calls zap_unlockdir() */
return (err);
}
int
zap_remove_uint64_by_dnode(dnode_t *dn, const uint64_t *key, int key_numints,
dmu_tx_t *tx)
{
zap_t *zap;
int err =
zap_lockdir_by_dnode(dn, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap);
if (err != 0)
return (err);
err = zap_remove_uint64_impl(zap, key, key_numints, tx, FTAG);
/* zap_remove_uint64_impl() calls zap_unlockdir() */
return (err);
}
@ -1704,14 +1787,17 @@ EXPORT_SYMBOL(zap_prefetch_uint64);
EXPORT_SYMBOL(zap_add);
EXPORT_SYMBOL(zap_add_by_dnode);
EXPORT_SYMBOL(zap_add_uint64);
EXPORT_SYMBOL(zap_add_uint64_by_dnode);
EXPORT_SYMBOL(zap_update);
EXPORT_SYMBOL(zap_update_uint64);
EXPORT_SYMBOL(zap_update_uint64_by_dnode);
EXPORT_SYMBOL(zap_length);
EXPORT_SYMBOL(zap_length_uint64);
EXPORT_SYMBOL(zap_remove);
EXPORT_SYMBOL(zap_remove_by_dnode);
EXPORT_SYMBOL(zap_remove_norm);
EXPORT_SYMBOL(zap_remove_uint64);
EXPORT_SYMBOL(zap_remove_uint64_by_dnode);
EXPORT_SYMBOL(zap_count);
EXPORT_SYMBOL(zap_value_search);
EXPORT_SYMBOL(zap_join);