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Illumos 5314 - Remove "dbuf phys" db->db_data pointer aliases in ZFS

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5314 Remove "dbuf phys" db->db_data pointer aliases in ZFS
Author: Justin T. Gibbs <justing@spectralogic.com>
Reviewed by: Andriy Gapon <avg@freebsd.org>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Will Andrews <willa@spectralogic.com>
Approved by: Dan McDonald <danmcd@omniti.com>

References:
  https://www.illumos.org/issues/5314
  https://github.com/illumos/illumos-gate/commit/c137962

Ported-by: Chris Dunlop <chris@onthe.net.au>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Justin T. Gibbs
2015-04-02 02:14:34 +11:00
committed by Brian Behlendorf
parent 945dd93525
commit d683ddbb72
32 changed files with 914 additions and 808 deletions
Download Patch File Download Diff File Expand all files Collapse all files
module/zfs/zap.c
+78 -80
View File
@@ -50,10 +50,11 @@
int fzap_default_block_shift = 14; /* 16k blocksize */
extern inline zap_phys_t *zap_f_phys(zap_t *zap);
static void zap_leaf_pageout(dmu_buf_t *db, void *vl);
static uint64_t zap_allocate_blocks(zap_t *zap, int nblocks);
void
fzap_byteswap(void *vbuf, size_t size)
{
@@ -80,13 +81,12 @@ fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags)
ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
zap->zap_ismicro = FALSE;
(void) dmu_buf_update_user(zap->zap_dbuf, zap, zap,
&zap->zap_f.zap_phys, zap_evict);
(void) dmu_buf_update_user(zap->zap_dbuf, zap, zap, zap_evict);
mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, 0, 0);
zap->zap_f.zap_block_shift = highbit64(zap->zap_dbuf->db_size) - 1;
zp = zap->zap_f.zap_phys;
zp = zap_f_phys(zap);
/*
* explicitly zero it since it might be coming from an
* initialized microzap
@@ -117,7 +117,6 @@ fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags)
l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP);
l->l_dbuf = db;
l->l_phys = db->db_data;
zap_leaf_init(l, zp->zap_normflags != 0);
@@ -325,10 +324,10 @@ zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx)
* If we are within 2 bits of running out, stop growing, since
* this is already an aberrant condition.
*/
if (zap->zap_f.zap_phys->zap_ptrtbl.zt_shift >= zap_hashbits(zap) - 2)
if (zap_f_phys(zap)->zap_ptrtbl.zt_shift >= zap_hashbits(zap) - 2)
return (SET_ERROR(ENOSPC));
if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) {
if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) {
/*
* We are outgrowing the "embedded" ptrtbl (the one
* stored in the header block). Give it its own entire
@@ -338,9 +337,9 @@ zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx)
dmu_buf_t *db_new;
int err;
ASSERT3U(zap->zap_f.zap_phys->zap_ptrtbl.zt_shift, ==,
ASSERT3U(zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==,
ZAP_EMBEDDED_PTRTBL_SHIFT(zap));
ASSERT0(zap->zap_f.zap_phys->zap_ptrtbl.zt_blk);
ASSERT0(zap_f_phys(zap)->zap_ptrtbl.zt_blk);
newblk = zap_allocate_blocks(zap, 1);
err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
@@ -353,17 +352,17 @@ zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx)
db_new->db_data, 1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap));
dmu_buf_rele(db_new, FTAG);
zap->zap_f.zap_phys->zap_ptrtbl.zt_blk = newblk;
zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks = 1;
zap->zap_f.zap_phys->zap_ptrtbl.zt_shift++;
zap_f_phys(zap)->zap_ptrtbl.zt_blk = newblk;
zap_f_phys(zap)->zap_ptrtbl.zt_numblks = 1;
zap_f_phys(zap)->zap_ptrtbl.zt_shift++;
ASSERT3U(1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift, ==,
zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks <<
ASSERT3U(1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==,
zap_f_phys(zap)->zap_ptrtbl.zt_numblks <<
(FZAP_BLOCK_SHIFT(zap)-3));
return (0);
} else {
return (zap_table_grow(zap, &zap->zap_f.zap_phys->zap_ptrtbl,
return (zap_table_grow(zap, &zap_f_phys(zap)->zap_ptrtbl,
zap_ptrtbl_transfer, tx));
}
}
@@ -373,8 +372,8 @@ zap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx)
{
dmu_buf_will_dirty(zap->zap_dbuf, tx);
mutex_enter(&zap->zap_f.zap_num_entries_mtx);
ASSERT(delta > 0 || zap->zap_f.zap_phys->zap_num_entries >= -delta);
zap->zap_f.zap_phys->zap_num_entries += delta;
ASSERT(delta > 0 || zap_f_phys(zap)->zap_num_entries >= -delta);
zap_f_phys(zap)->zap_num_entries += delta;
mutex_exit(&zap->zap_f.zap_num_entries_mtx);
}
@@ -383,8 +382,8 @@ zap_allocate_blocks(zap_t *zap, int nblocks)
{
uint64_t newblk;
ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
newblk = zap->zap_f.zap_phys->zap_freeblk;
zap->zap_f.zap_phys->zap_freeblk += nblocks;
newblk = zap_f_phys(zap)->zap_freeblk;
zap_f_phys(zap)->zap_freeblk += nblocks;
return (newblk);
}
@@ -400,18 +399,17 @@ zap_create_leaf(zap_t *zap, dmu_tx_t *tx)
rw_enter(&l->l_rwlock, RW_WRITER);
l->l_blkid = zap_allocate_blocks(zap, 1);
l->l_dbuf = NULL;
l->l_phys = NULL;
VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object,
l->l_blkid << FZAP_BLOCK_SHIFT(zap), NULL, &l->l_dbuf,
DMU_READ_NO_PREFETCH));
winner = dmu_buf_set_user(l->l_dbuf, l, &l->l_phys, zap_leaf_pageout);
winner = dmu_buf_set_user(l->l_dbuf, l, zap_leaf_pageout);
ASSERT(winner == NULL);
dmu_buf_will_dirty(l->l_dbuf, tx);
zap_leaf_init(l, zap->zap_normflags != 0);
zap->zap_f.zap_phys->zap_num_leafs++;
zap_f_phys(zap)->zap_num_leafs++;
return (l);
}
@@ -421,7 +419,7 @@ fzap_count(zap_t *zap, uint64_t *count)
{
ASSERT(!zap->zap_ismicro);
mutex_enter(&zap->zap_f.zap_num_entries_mtx); /* unnecessary */
*count = zap->zap_f.zap_phys->zap_num_entries;
*count = zap_f_phys(zap)->zap_num_entries;
mutex_exit(&zap->zap_f.zap_num_entries_mtx);
return (0);
}
@@ -460,9 +458,8 @@ zap_open_leaf(uint64_t blkid, dmu_buf_t *db)
l->l_blkid = blkid;
l->l_bs = highbit64(db->db_size) - 1;
l->l_dbuf = db;
l->l_phys = NULL;
winner = dmu_buf_set_user(db, l, &l->l_phys, zap_leaf_pageout);
winner = dmu_buf_set_user(db, l, zap_leaf_pageout);
rw_exit(&l->l_rwlock);
if (winner != NULL) {
@@ -476,7 +473,7 @@ zap_open_leaf(uint64_t blkid, dmu_buf_t *db)
* chain. There should be no chained leafs (as we have removed
* support for them).
*/
ASSERT0(l->l_phys->l_hdr.lh_pad1);
ASSERT0(zap_leaf_phys(l)->l_hdr.lh_pad1);
/*
* There should be more hash entries than there can be
@@ -486,11 +483,11 @@ zap_open_leaf(uint64_t blkid, dmu_buf_t *db)
/* The chunks should begin at the end of the hash table */
ASSERT3P(&ZAP_LEAF_CHUNK(l, 0), ==, (zap_leaf_chunk_t *)
&l->l_phys->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]);
&zap_leaf_phys(l)->l_hash[ZAP_LEAF_HASH_NUMENTRIES(l)]);
/* The chunks should end at the end of the block */
ASSERT3U((uintptr_t)&ZAP_LEAF_CHUNK(l, ZAP_LEAF_NUMCHUNKS(l)) -
(uintptr_t)l->l_phys, ==, l->l_dbuf->db_size);
(uintptr_t)zap_leaf_phys(l), ==, l->l_dbuf->db_size);
return (l);
}
@@ -523,16 +520,15 @@ zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt,
rw_enter(&l->l_rwlock, lt);
/*
* Must lock before dirtying, otherwise l->l_phys could change,
* Must lock before dirtying, otherwise zap_leaf_phys(l) could change,
* causing ASSERT below to fail.
*/
if (lt == RW_WRITER)
dmu_buf_will_dirty(db, tx);
ASSERT3U(l->l_blkid, ==, blkid);
ASSERT3P(l->l_dbuf, ==, db);
ASSERT3P(l->l_phys, ==, l->l_dbuf->db_data);
ASSERT3U(l->l_phys->l_hdr.lh_block_type, ==, ZBT_LEAF);
ASSERT3U(l->l_phys->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC);
ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_block_type, ==, ZBT_LEAF);
ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC);
*lp = l;
return (0);
@@ -543,13 +539,13 @@ zap_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t *valp)
{
ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) {
if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) {
ASSERT3U(idx, <,
(1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift));
(1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift));
*valp = ZAP_EMBEDDED_PTRTBL_ENT(zap, idx);
return (0);
} else {
return (zap_table_load(zap, &zap->zap_f.zap_phys->zap_ptrtbl,
return (zap_table_load(zap, &zap_f_phys(zap)->zap_ptrtbl,
idx, valp));
}
}
@@ -560,11 +556,11 @@ zap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx)
ASSERT(tx != NULL);
ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
if (zap->zap_f.zap_phys->zap_ptrtbl.zt_blk == 0) {
if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0) {
ZAP_EMBEDDED_PTRTBL_ENT(zap, idx) = blk;
return (0);
} else {
return (zap_table_store(zap, &zap->zap_f.zap_phys->zap_ptrtbl,
return (zap_table_store(zap, &zap_f_phys(zap)->zap_ptrtbl,
idx, blk, tx));
}
}
@@ -576,16 +572,17 @@ zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp)
int err;
ASSERT(zap->zap_dbuf == NULL ||
zap->zap_f.zap_phys == zap->zap_dbuf->db_data);
ASSERT3U(zap->zap_f.zap_phys->zap_magic, ==, ZAP_MAGIC);
idx = ZAP_HASH_IDX(h, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift);
zap_f_phys(zap) == zap->zap_dbuf->db_data);
ASSERT3U(zap_f_phys(zap)->zap_magic, ==, ZAP_MAGIC);
idx = ZAP_HASH_IDX(h, zap_f_phys(zap)->zap_ptrtbl.zt_shift);
err = zap_idx_to_blk(zap, idx, &blk);
if (err != 0)
return (err);
err = zap_get_leaf_byblk(zap, blk, tx, lt, lp);
ASSERT(err || ZAP_HASH_IDX(h, (*lp)->l_phys->l_hdr.lh_prefix_len) ==
(*lp)->l_phys->l_hdr.lh_prefix);
ASSERT(err ||
ZAP_HASH_IDX(h, zap_leaf_phys(*lp)->l_hdr.lh_prefix_len) ==
zap_leaf_phys(*lp)->l_hdr.lh_prefix);
return (err);
}
@@ -597,16 +594,16 @@ zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx, zap_leaf_t **lp)
zap_leaf_t *nl;
int prefix_diff, i, err;
uint64_t sibling;
int old_prefix_len = l->l_phys->l_hdr.lh_prefix_len;
int old_prefix_len = zap_leaf_phys(l)->l_hdr.lh_prefix_len;
ASSERT3U(old_prefix_len, <=, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift);
ASSERT3U(old_prefix_len, <=, zap_f_phys(zap)->zap_ptrtbl.zt_shift);
ASSERT(RW_LOCK_HELD(&zap->zap_rwlock));
ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==,
l->l_phys->l_hdr.lh_prefix);
zap_leaf_phys(l)->l_hdr.lh_prefix);
if (zap_tryupgradedir(zap, tx) == 0 ||
old_prefix_len == zap->zap_f.zap_phys->zap_ptrtbl.zt_shift) {
old_prefix_len == zap_f_phys(zap)->zap_ptrtbl.zt_shift) {
/* We failed to upgrade, or need to grow the pointer table */
objset_t *os = zap->zap_objset;
uint64_t object = zap->zap_object;
@@ -621,7 +618,7 @@ zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx, zap_leaf_t **lp)
ASSERT(!zap->zap_ismicro);
while (old_prefix_len ==
zap->zap_f.zap_phys->zap_ptrtbl.zt_shift) {
zap_f_phys(zap)->zap_ptrtbl.zt_shift) {
err = zap_grow_ptrtbl(zap, tx);
if (err)
return (err);
@@ -631,18 +628,18 @@ zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx, zap_leaf_t **lp)
if (err)
return (err);
if (l->l_phys->l_hdr.lh_prefix_len != old_prefix_len) {
if (zap_leaf_phys(l)->l_hdr.lh_prefix_len != old_prefix_len) {
/* it split while our locks were down */
*lp = l;
return (0);
}
}
ASSERT(RW_WRITE_HELD(&zap->zap_rwlock));
ASSERT3U(old_prefix_len, <, zap->zap_f.zap_phys->zap_ptrtbl.zt_shift);
ASSERT3U(old_prefix_len, <, zap_f_phys(zap)->zap_ptrtbl.zt_shift);
ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==,
l->l_phys->l_hdr.lh_prefix);
zap_leaf_phys(l)->l_hdr.lh_prefix);
prefix_diff = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift -
prefix_diff = zap_f_phys(zap)->zap_ptrtbl.zt_shift -
(old_prefix_len + 1);
sibling = (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff;
@@ -664,7 +661,7 @@ zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx, zap_leaf_t **lp)
ASSERT0(err); /* we checked for i/o errors above */
}
if (hash & (1ULL << (64 - l->l_phys->l_hdr.lh_prefix_len))) {
if (hash & (1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len))) {
/* we want the sibling */
zap_put_leaf(l);
*lp = nl;
@@ -680,13 +677,13 @@ static void
zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx)
{
zap_t *zap = zn->zn_zap;
int shift = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift;
int leaffull = (l->l_phys->l_hdr.lh_prefix_len == shift &&
l->l_phys->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER);
int shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift;
int leaffull = (zap_leaf_phys(l)->l_hdr.lh_prefix_len == shift &&
zap_leaf_phys(l)->l_hdr.lh_nfree < ZAP_LEAF_LOW_WATER);
zap_put_leaf(l);
if (leaffull || zap->zap_f.zap_phys->zap_ptrtbl.zt_nextblk) {
if (leaffull || zap_f_phys(zap)->zap_ptrtbl.zt_nextblk) {
int err;
/*
@@ -706,7 +703,7 @@ zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, dmu_tx_t *tx)
}
/* could have finished growing while our locks were down */
if (zap->zap_f.zap_phys->zap_ptrtbl.zt_shift == shift)
if (zap_f_phys(zap)->zap_ptrtbl.zt_shift == shift)
(void) zap_grow_ptrtbl(zap, tx);
}
}
@@ -937,7 +934,7 @@ fzap_prefetch(zap_name_t *zn)
int bs;
idx = ZAP_HASH_IDX(zn->zn_hash,
zap->zap_f.zap_phys->zap_ptrtbl.zt_shift);
zap_f_phys(zap)->zap_ptrtbl.zt_shift);
if (zap_idx_to_blk(zap, idx, &blk) != 0)
return;
bs = FZAP_BLOCK_SHIFT(zap);
@@ -1169,8 +1166,8 @@ fzap_cursor_retrieve(zap_t *zap, zap_cursor_t *zc, zap_attribute_t *za)
if (zc->zc_leaf &&
(ZAP_HASH_IDX(zc->zc_hash,
zc->zc_leaf->l_phys->l_hdr.lh_prefix_len) !=
zc->zc_leaf->l_phys->l_hdr.lh_prefix)) {
zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix_len) !=
zap_leaf_phys(zc->zc_leaf)->l_hdr.lh_prefix)) {
rw_enter(&zc->zc_leaf->l_rwlock, RW_READER);
zap_put_leaf(zc->zc_leaf);
zc->zc_leaf = NULL;
@@ -1191,10 +1188,11 @@ again:
if (err == ENOENT) {
uint64_t nocare =
(1ULL << (64 - l->l_phys->l_hdr.lh_prefix_len)) - 1;
(1ULL << (64 - zap_leaf_phys(l)->l_hdr.lh_prefix_len)) - 1;
zc->zc_hash = (zc->zc_hash & ~nocare) + nocare + 1;
zc->zc_cd = 0;
if (l->l_phys->l_hdr.lh_prefix_len == 0 || zc->zc_hash == 0) {
if (zap_leaf_phys(l)->l_hdr.lh_prefix_len == 0 ||
zc->zc_hash == 0) {
zc->zc_hash = -1ULL;
} else {
zap_put_leaf(zc->zc_leaf);
@@ -1286,25 +1284,25 @@ fzap_get_stats(zap_t *zap, zap_stats_t *zs)
/*
* Set zap_phys_t fields
*/
zs->zs_num_leafs = zap->zap_f.zap_phys->zap_num_leafs;
zs->zs_num_entries = zap->zap_f.zap_phys->zap_num_entries;
zs->zs_num_blocks = zap->zap_f.zap_phys->zap_freeblk;
zs->zs_block_type = zap->zap_f.zap_phys->zap_block_type;
zs->zs_magic = zap->zap_f.zap_phys->zap_magic;
zs->zs_salt = zap->zap_f.zap_phys->zap_salt;
zs->zs_num_leafs = zap_f_phys(zap)->zap_num_leafs;
zs->zs_num_entries = zap_f_phys(zap)->zap_num_entries;
zs->zs_num_blocks = zap_f_phys(zap)->zap_freeblk;
zs->zs_block_type = zap_f_phys(zap)->zap_block_type;
zs->zs_magic = zap_f_phys(zap)->zap_magic;
zs->zs_salt = zap_f_phys(zap)->zap_salt;
/*
* Set zap_ptrtbl fields
*/
zs->zs_ptrtbl_len = 1ULL << zap->zap_f.zap_phys->zap_ptrtbl.zt_shift;
zs->zs_ptrtbl_nextblk = zap->zap_f.zap_phys->zap_ptrtbl.zt_nextblk;
zs->zs_ptrtbl_len = 1ULL << zap_f_phys(zap)->zap_ptrtbl.zt_shift;
zs->zs_ptrtbl_nextblk = zap_f_phys(zap)->zap_ptrtbl.zt_nextblk;
zs->zs_ptrtbl_blks_copied =
zap->zap_f.zap_phys->zap_ptrtbl.zt_blks_copied;
zs->zs_ptrtbl_zt_blk = zap->zap_f.zap_phys->zap_ptrtbl.zt_blk;
zs->zs_ptrtbl_zt_numblks = zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks;
zs->zs_ptrtbl_zt_shift = zap->zap_f.zap_phys->zap_ptrtbl.zt_shift;
zap_f_phys(zap)->zap_ptrtbl.zt_blks_copied;
zs->zs_ptrtbl_zt_blk = zap_f_phys(zap)->zap_ptrtbl.zt_blk;
zs->zs_ptrtbl_zt_numblks = zap_f_phys(zap)->zap_ptrtbl.zt_numblks;
zs->zs_ptrtbl_zt_shift = zap_f_phys(zap)->zap_ptrtbl.zt_shift;
if (zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks == 0) {
if (zap_f_phys(zap)->zap_ptrtbl.zt_numblks == 0) {
/* the ptrtbl is entirely in the header block. */
zap_stats_ptrtbl(zap, &ZAP_EMBEDDED_PTRTBL_ENT(zap, 0),
1 << ZAP_EMBEDDED_PTRTBL_SHIFT(zap), zs);
@@ -1312,16 +1310,16 @@ fzap_get_stats(zap_t *zap, zap_stats_t *zs)
int b;
dmu_prefetch(zap->zap_objset, zap->zap_object,
zap->zap_f.zap_phys->zap_ptrtbl.zt_blk << bs,
zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks << bs);
zap_f_phys(zap)->zap_ptrtbl.zt_blk << bs,
zap_f_phys(zap)->zap_ptrtbl.zt_numblks << bs);
for (b = 0; b < zap->zap_f.zap_phys->zap_ptrtbl.zt_numblks;
for (b = 0; b < zap_f_phys(zap)->zap_ptrtbl.zt_numblks;
b++) {
dmu_buf_t *db;
int err;
err = dmu_buf_hold(zap->zap_objset, zap->zap_object,
(zap->zap_f.zap_phys->zap_ptrtbl.zt_blk + b) << bs,
(zap_f_phys(zap)->zap_ptrtbl.zt_blk + b) << bs,
FTAG, &db, DMU_READ_NO_PREFETCH);
if (err == 0) {
zap_stats_ptrtbl(zap, db->db_data,
@@ -1358,7 +1356,7 @@ fzap_count_write(zap_name_t *zn, int add, uint64_t *towrite,
* could extend the table.
*/
if (add) {
if (zap->zap_f.zap_phys->zap_ptrtbl.zt_blk == 0)
if (zap_f_phys(zap)->zap_ptrtbl.zt_blk == 0)
*towrite += zap->zap_dbuf->db_size;
else
*towrite += (zap->zap_dbuf->db_size * 3);