diff options
| -rw-r--r-- | module/zfs/zap.c | 237 | ||||
| -rw-r--r-- | module/zfs/zap_leaf.c | 83 | ||||
| -rw-r--r-- | module/zfs/zap_micro.c | 232 |
3 files changed, 224 insertions, 328 deletions
diff --git a/module/zfs/zap.c b/module/zfs/zap.c index d899ccdb7..6d8c49804 100644 --- a/module/zfs/zap.c +++ b/module/zfs/zap.c @@ -58,9 +58,7 @@ static uint64_t zap_allocate_blocks(zap_t *zap, int nblocks); void fzap_byteswap(void *vbuf, size_t size) { - uint64_t block_type; - - block_type = *(uint64_t *)vbuf; + uint64_t block_type = *(uint64_t *)vbuf; if (block_type == ZBT_LEAF || block_type == BSWAP_64(ZBT_LEAF)) zap_leaf_byteswap(vbuf, size); @@ -73,11 +71,6 @@ fzap_byteswap(void *vbuf, size_t size) void fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags) { - dmu_buf_t *db; - zap_leaf_t *l; - int i; - zap_phys_t *zp; - ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); zap->zap_ismicro = FALSE; @@ -87,7 +80,7 @@ fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags) mutex_init(&zap->zap_f.zap_num_entries_mtx, 0, MUTEX_DEFAULT, 0); zap->zap_f.zap_block_shift = highbit64(zap->zap_dbuf->db_size) - 1; - zp = zap_f_phys(zap); + zap_phys_t *zp = zap_f_phys(zap); /* * explicitly zero it since it might be coming from an * initialized microzap @@ -106,17 +99,18 @@ fzap_upgrade(zap_t *zap, dmu_tx_t *tx, zap_flags_t flags) zp->zap_flags = flags; /* block 1 will be the first leaf */ - for (i = 0; i < (1<<zp->zap_ptrtbl.zt_shift); i++) + for (int i = 0; i < (1<<zp->zap_ptrtbl.zt_shift); i++) ZAP_EMBEDDED_PTRTBL_ENT(zap, i) = 1; /* * set up block 1 - the first leaf */ - VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, + dmu_buf_t *db; + VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, 1<<FZAP_BLOCK_SHIFT(zap), FTAG, &db, DMU_READ_NO_PREFETCH)); dmu_buf_will_dirty(db, tx); - l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); + zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); l->l_dbuf = db; zap_leaf_init(l, zp->zap_normflags != 0); @@ -146,9 +140,7 @@ zap_table_grow(zap_t *zap, zap_table_phys_t *tbl, void (*transfer_func)(const uint64_t *src, uint64_t *dst, int n), dmu_tx_t *tx) { - uint64_t b, newblk; - dmu_buf_t *db_old, *db_new; - int err; + uint64_t newblk; int bs = FZAP_BLOCK_SHIFT(zap); int hepb = 1<<(bs-4); /* hepb = half the number of entries in a block */ @@ -172,21 +164,23 @@ zap_table_grow(zap_t *zap, zap_table_phys_t *tbl, * Copy the ptrtbl from the old to new location. */ - b = tbl->zt_blks_copied; - err = dmu_buf_hold(zap->zap_objset, zap->zap_object, + uint64_t b = tbl->zt_blks_copied; + dmu_buf_t *db_old; + int err = dmu_buf_hold(zap->zap_objset, zap->zap_object, (tbl->zt_blk + b) << bs, FTAG, &db_old, DMU_READ_NO_PREFETCH); - if (err) + if (err != 0) return (err); /* first half of entries in old[b] go to new[2*b+0] */ - VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, + dmu_buf_t *db_new; + VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, (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] */ - VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, + VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, (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, @@ -221,22 +215,20 @@ static int zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val, dmu_tx_t *tx) { - int err; - uint64_t blk, off; int bs = FZAP_BLOCK_SHIFT(zap); - dmu_buf_t *db; ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); ASSERT(tbl->zt_blk != 0); dprintf("storing %llx at index %llx\n", val, idx); - blk = idx >> (bs-3); - off = idx & ((1<<(bs-3))-1); + uint64_t blk = idx >> (bs-3); + uint64_t off = idx & ((1<<(bs-3))-1); - err = dmu_buf_hold(zap->zap_objset, zap->zap_object, + dmu_buf_t *db; + int err = dmu_buf_hold(zap->zap_objset, zap->zap_object, (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); - if (err) + if (err != 0) return (err); dmu_buf_will_dirty(db, tx); @@ -249,7 +241,7 @@ zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val, err = dmu_buf_hold(zap->zap_objset, zap->zap_object, (tbl->zt_nextblk + blk2) << bs, FTAG, &db2, DMU_READ_NO_PREFETCH); - if (err) { + if (err != 0) { dmu_buf_rele(db, FTAG); return (err); } @@ -268,27 +260,24 @@ zap_table_store(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t val, static int zap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp) { - uint64_t blk, off; - int err; - dmu_buf_t *db; - dnode_t *dn; int bs = FZAP_BLOCK_SHIFT(zap); ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); - blk = idx >> (bs-3); - off = idx & ((1<<(bs-3))-1); + 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. */ - dn = dmu_buf_dnode_enter(zap->zap_dbuf); - err = dmu_buf_hold_by_dnode(dn, + dnode_t *dn = dmu_buf_dnode_enter(zap->zap_dbuf); + dmu_buf_t *db; + int err = dmu_buf_hold_by_dnode(dn, (tbl->zt_blk + blk) << bs, FTAG, &db, DMU_READ_NO_PREFETCH); dmu_buf_dnode_exit(zap->zap_dbuf); - if (err) + if (err != 0) return (err); *valp = ((uint64_t *)db->db_data)[off]; dmu_buf_rele(db, FTAG); @@ -319,11 +308,10 @@ zap_table_load(zap_t *zap, zap_table_phys_t *tbl, uint64_t idx, uint64_t *valp) static void zap_ptrtbl_transfer(const uint64_t *src, uint64_t *dst, int n) { - int i; - for (i = 0; i < n; i++) { + for (int i = 0; i < n; i++) { uint64_t lb = src[i]; - dst[2*i+0] = lb; - dst[2*i+1] = lb; + dst[2 * i + 0] = lb; + dst[2 * i + 1] = lb; } } @@ -345,19 +333,16 @@ zap_grow_ptrtbl(zap_t *zap, dmu_tx_t *tx) * stored in the header block). Give it its own entire * block, which will double the size of the ptrtbl. */ - uint64_t newblk; - dmu_buf_t *db_new; - int err; - ASSERT3U(zap_f_phys(zap)->zap_ptrtbl.zt_shift, ==, ZAP_EMBEDDED_PTRTBL_SHIFT(zap)); 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, + uint64_t newblk = zap_allocate_blocks(zap, 1); + dmu_buf_t *db_new; + int err = dmu_buf_hold(zap->zap_objset, zap->zap_object, newblk << FZAP_BLOCK_SHIFT(zap), FTAG, &db_new, DMU_READ_NO_PREFETCH); - if (err) + if (err != 0) return (err); dmu_buf_will_dirty(db_new, tx); zap_ptrtbl_transfer(&ZAP_EMBEDDED_PTRTBL_ENT(zap, 0), @@ -392,9 +377,8 @@ zap_increment_num_entries(zap_t *zap, int delta, dmu_tx_t *tx) static uint64_t zap_allocate_blocks(zap_t *zap, int nblocks) { - uint64_t newblk; ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); - newblk = zap_f_phys(zap)->zap_freeblk; + uint64_t newblk = zap_f_phys(zap)->zap_freeblk; zap_f_phys(zap)->zap_freeblk += nblocks; return (newblk); } @@ -411,7 +395,6 @@ zap_leaf_evict_sync(void *dbu) static zap_leaf_t * zap_create_leaf(zap_t *zap, dmu_tx_t *tx) { - void *winner; zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); @@ -421,12 +404,11 @@ zap_create_leaf(zap_t *zap, dmu_tx_t *tx) l->l_blkid = zap_allocate_blocks(zap, 1); l->l_dbuf = NULL; - VERIFY(0 == dmu_buf_hold(zap->zap_objset, zap->zap_object, + VERIFY0(dmu_buf_hold(zap->zap_objset, zap->zap_object, 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); - winner = dmu_buf_set_user(l->l_dbuf, &l->l_dbu); - ASSERT(winner == NULL); + VERIFY3P(NULL, ==, dmu_buf_set_user(l->l_dbuf, &l->l_dbu)); dmu_buf_will_dirty(l->l_dbuf, tx); zap_leaf_init(l, zap->zap_normflags != 0); @@ -460,11 +442,9 @@ zap_put_leaf(zap_leaf_t *l) static zap_leaf_t * zap_open_leaf(uint64_t blkid, dmu_buf_t *db) { - zap_leaf_t *l, *winner; - ASSERT(blkid != 0); - l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); + zap_leaf_t *l = kmem_zalloc(sizeof (zap_leaf_t), KM_SLEEP); rw_init(&l->l_rwlock, NULL, RW_DEFAULT, NULL); rw_enter(&l->l_rwlock, RW_WRITER); l->l_blkid = blkid; @@ -472,7 +452,7 @@ zap_open_leaf(uint64_t blkid, dmu_buf_t *db) l->l_dbuf = db; dmu_buf_init_user(&l->l_dbu, zap_leaf_evict_sync, NULL, &l->l_dbuf); - winner = dmu_buf_set_user(db, &l->l_dbu); + zap_leaf_t *winner = dmu_buf_set_user(db, &l->l_dbu); rw_exit(&l->l_rwlock); if (winner != NULL) { @@ -510,9 +490,6 @@ zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp) { dmu_buf_t *db; - zap_leaf_t *l; - int bs = FZAP_BLOCK_SHIFT(zap); - int err; ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); @@ -526,11 +503,12 @@ zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt, if (blkid == 0) return (SET_ERROR(ENOENT)); + int bs = FZAP_BLOCK_SHIFT(zap); dnode_t *dn = dmu_buf_dnode_enter(zap->zap_dbuf); - err = dmu_buf_hold_by_dnode(dn, + int err = dmu_buf_hold_by_dnode(dn, blkid << bs, NULL, &db, DMU_READ_NO_PREFETCH); dmu_buf_dnode_exit(zap->zap_dbuf); - if (err) + if (err != 0) return (err); ASSERT3U(db->db_object, ==, zap->zap_object); @@ -538,7 +516,7 @@ zap_get_leaf_byblk(zap_t *zap, uint64_t blkid, dmu_tx_t *tx, krw_t lt, ASSERT3U(db->db_size, ==, 1 << bs); ASSERT(blkid != 0); - l = dmu_buf_get_user(db); + zap_leaf_t *l = dmu_buf_get_user(db); if (l == NULL) l = zap_open_leaf(blkid, db); @@ -593,8 +571,7 @@ zap_set_idx_to_blk(zap_t *zap, uint64_t idx, uint64_t blk, dmu_tx_t *tx) static int zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp) { - uint64_t idx, blk; - int err; + uint64_t blk; ASSERT(zap->zap_dbuf == NULL || zap_f_phys(zap) == zap->zap_dbuf->db_data); @@ -605,8 +582,9 @@ zap_deref_leaf(zap_t *zap, uint64_t h, dmu_tx_t *tx, krw_t lt, zap_leaf_t **lp) zap_f_phys(zap)->zap_magic != ZAP_MAGIC) { return (SET_ERROR(EIO)); } - idx = ZAP_HASH_IDX(h, zap_f_phys(zap)->zap_ptrtbl.zt_shift); - err = zap_idx_to_blk(zap, idx, &blk); + + uint64_t idx = ZAP_HASH_IDX(h, zap_f_phys(zap)->zap_ptrtbl.zt_shift); + int err = zap_idx_to_blk(zap, idx, &blk); if (err != 0) return (err); err = zap_get_leaf_byblk(zap, blk, tx, lt, lp); @@ -623,9 +601,7 @@ zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, { zap_t *zap = zn->zn_zap; uint64_t hash = zn->zn_hash; - zap_leaf_t *nl; - int prefix_diff, i, err; - uint64_t sibling; + int err; int old_prefix_len = zap_leaf_phys(l)->l_hdr.lh_prefix_len; ASSERT3U(old_prefix_len, <=, zap_f_phys(zap)->zap_ptrtbl.zt_shift); @@ -645,19 +621,19 @@ zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, err = zap_lockdir(os, object, tx, RW_WRITER, FALSE, FALSE, tag, &zn->zn_zap); zap = zn->zn_zap; - if (err) + if (err != 0) return (err); ASSERT(!zap->zap_ismicro); while (old_prefix_len == zap_f_phys(zap)->zap_ptrtbl.zt_shift) { err = zap_grow_ptrtbl(zap, tx); - if (err) + if (err != 0) return (err); } err = zap_deref_leaf(zap, hash, tx, RW_WRITER, &l); - if (err) + if (err != 0) return (err); if (zap_leaf_phys(l)->l_hdr.lh_prefix_len != old_prefix_len) { @@ -671,25 +647,26 @@ zap_expand_leaf(zap_name_t *zn, zap_leaf_t *l, ASSERT3U(ZAP_HASH_IDX(hash, old_prefix_len), ==, zap_leaf_phys(l)->l_hdr.lh_prefix); - prefix_diff = zap_f_phys(zap)->zap_ptrtbl.zt_shift - + int 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; + uint64_t sibling = + (ZAP_HASH_IDX(hash, old_prefix_len + 1) | 1) << prefix_diff; /* check for i/o errors before doing zap_leaf_split */ - for (i = 0; i < (1ULL<<prefix_diff); i++) { + for (int i = 0; i < (1ULL << prefix_diff); i++) { uint64_t blk; - err = zap_idx_to_blk(zap, sibling+i, &blk); - if (err) + err = zap_idx_to_blk(zap, sibling + i, &blk); + if (err != 0) return (err); ASSERT3U(blk, ==, l->l_blkid); } - nl = zap_create_leaf(zap, tx); + zap_leaf_t *nl = zap_create_leaf(zap, tx); zap_leaf_split(l, nl, zap->zap_normflags != 0); /* set sibling pointers */ - for (i = 0; i < (1ULL << prefix_diff); i++) { - err = zap_set_idx_to_blk(zap, sibling+i, nl->l_blkid, tx); + for (int i = 0; i < (1ULL << prefix_diff); i++) { + err = zap_set_idx_to_blk(zap, sibling + i, nl->l_blkid, tx); ASSERT0(err); /* we checked for i/o errors above */ } @@ -719,8 +696,6 @@ zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, zap_put_leaf(l); if (leaffull || zap_f_phys(zap)->zap_ptrtbl.zt_nextblk) { - int err; - /* * We are in the middle of growing the pointer table, or * this leaf will soon make us grow it. @@ -730,10 +705,10 @@ zap_put_leaf_maybe_grow_ptrtbl(zap_name_t *zn, zap_leaf_t *l, uint64_t zapobj = zap->zap_object; zap_unlockdir(zap, tag); - err = zap_lockdir(os, zapobj, tx, + int err = zap_lockdir(os, zapobj, tx, RW_WRITER, FALSE, FALSE, tag, &zn->zn_zap); zap = zn->zn_zap; - if (err) + if (err != 0) return; } @@ -774,9 +749,8 @@ fzap_checksize(uint64_t integer_size, uint64_t num_integers) static int fzap_check(zap_name_t *zn, uint64_t integer_size, uint64_t num_integers) { - int err; - - if ((err = fzap_checkname(zn)) != 0) + int err = fzap_checkname(zn); + if (err != 0) return (err); return (fzap_checksize(integer_size, num_integers)); } @@ -790,10 +764,10 @@ fzap_lookup(zap_name_t *zn, char *realname, int rn_len, boolean_t *ncp) { zap_leaf_t *l; - int err; zap_entry_handle_t zeh; - if ((err = fzap_checkname(zn)) != 0) + int err = fzap_checkname(zn); + if (err != 0) return (err); err = zap_deref_leaf(zn->zn_zap, zn->zn_hash, NULL, RW_READER, &l); @@ -889,7 +863,8 @@ fzap_update(zap_name_t *zn, void *tag, dmu_tx_t *tx) { zap_leaf_t *l; - int err, create; + int err; + boolean_t create; zap_entry_handle_t zeh; zap_t *zap = zn->zn_zap; @@ -942,9 +917,9 @@ fzap_length(zap_name_t *zn, if (err != 0) goto out; - if (integer_size) + if (integer_size != 0) *integer_size = zeh.zeh_integer_size; - if (num_integers) + if (num_integers != 0) *num_integers = zeh.zeh_num_integers; out: zap_put_leaf(l); @@ -973,15 +948,14 @@ fzap_remove(zap_name_t *zn, dmu_tx_t *tx) void fzap_prefetch(zap_name_t *zn) { - uint64_t idx, blk; + uint64_t blk; zap_t *zap = zn->zn_zap; - int bs; - idx = ZAP_HASH_IDX(zn->zn_hash, + uint64_t idx = ZAP_HASH_IDX(zn->zn_hash, zap_f_phys(zap)->zap_ptrtbl.zt_shift); if (zap_idx_to_blk(zap, idx, &blk) != 0) return; - bs = FZAP_BLOCK_SHIFT(zap); + int bs = FZAP_BLOCK_SHIFT(zap); dmu_prefetch(zap->zap_objset, zap->zap_object, 0, blk << bs, 1 << bs, ZIO_PRIORITY_SYNC_READ); } @@ -1003,8 +977,8 @@ zap_create_link_dnsize(objset_t *os, dmu_object_type_t ot, uint64_t parent_obj, { uint64_t new_obj; - VERIFY((new_obj = zap_create_dnsize(os, ot, DMU_OT_NONE, 0, - dnodesize, tx)) > 0); + new_obj = zap_create_dnsize(os, ot, DMU_OT_NONE, 0, dnodesize, tx); + VERIFY(new_obj != 0); VERIFY0(zap_add(os, parent_obj, name, sizeof (uint64_t), 1, &new_obj, tx)); @@ -1016,13 +990,12 @@ zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask, char *name) { zap_cursor_t zc; - zap_attribute_t *za; int err; if (mask == 0) mask = -1ULL; - za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP); + zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); for (zap_cursor_init(&zc, os, zapobj); (err = zap_cursor_retrieve(&zc, za)) == 0; zap_cursor_advance(&zc)) { @@ -1032,7 +1005,7 @@ zap_value_search(objset_t *os, uint64_t zapobj, uint64_t value, uint64_t mask, } } zap_cursor_fini(&zc); - kmem_free(za, sizeof (zap_attribute_t)); + kmem_free(za, sizeof (*za)); return (err); } @@ -1040,23 +1013,23 @@ int zap_join(objset_t *os, uint64_t fromobj, uint64_t intoobj, dmu_tx_t *tx) { zap_cursor_t zc; - zap_attribute_t za; - int err; + int err = 0; - err = 0; + zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); for (zap_cursor_init(&zc, os, fromobj); - zap_cursor_retrieve(&zc, &za) == 0; + zap_cursor_retrieve(&zc, za) == 0; (void) zap_cursor_advance(&zc)) { - if (za.za_integer_length != 8 || za.za_num_integers != 1) { + if (za->za_integer_length != 8 || za->za_num_integers != 1) { err = SET_ERROR(EINVAL); break; } - err = zap_add(os, intoobj, za.za_name, - 8, 1, &za.za_first_integer, tx); - if (err) + err = zap_add(os, intoobj, za->za_name, + 8, 1, &za->za_first_integer, tx); + if (err != 0) break; } zap_cursor_fini(&zc); + kmem_free(za, sizeof (*za)); return (err); } @@ -1065,23 +1038,23 @@ zap_join_key(objset_t *os, uint64_t fromobj, uint64_t intoobj, uint64_t value, dmu_tx_t *tx) { zap_cursor_t zc; - zap_attribute_t za; - int err; + int err = 0; - err = 0; + zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); for (zap_cursor_init(&zc, os, fromobj); - zap_cursor_retrieve(&zc, &za) == 0; + zap_cursor_retrieve(&zc, za) == 0; (void) zap_cursor_advance(&zc)) { - if (za.za_integer_length != 8 || za.za_num_integers != 1) { + if (za->za_integer_length != 8 || za->za_num_integers != 1) { err = SET_ERROR(EINVAL); break; } - err = zap_add(os, intoobj, za.za_name, + err = zap_add(os, intoobj, za->za_name, 8, 1, &value, tx); if (err != 0) break; } zap_cursor_fini(&zc); + kmem_free(za, sizeof (*za)); return (err); } @@ -1090,29 +1063,29 @@ zap_join_increment(objset_t *os, uint64_t fromobj, uint64_t intoobj, dmu_tx_t *tx) { zap_cursor_t zc; - zap_attribute_t za; - int err; + int err = 0; - err = 0; + zap_attribute_t *za = kmem_alloc(sizeof (*za), KM_SLEEP); for (zap_cursor_init(&zc, os, fromobj); - zap_cursor_retrieve(&zc, &za) == 0; + zap_cursor_retrieve(&zc, za) == 0; (void) zap_cursor_advance(&zc)) { uint64_t delta = 0; - if (za.za_integer_length != 8 || za.za_num_integers != 1) { + if (za->za_integer_length != 8 || za->za_num_integers != 1) { err = SET_ERROR(EINVAL); break; } - err = zap_lookup(os, intoobj, za.za_name, 8, 1, &delta); + err = zap_lookup(os, intoobj, za->za_name, 8, 1, &delta); if (err != 0 && err != ENOENT) break; - delta += za.za_first_integer; - err = zap_update(os, intoobj, za.za_name, 8, 1, &delta, tx); - if (err) + delta += za->za_first_integer; + err = zap_update(os, intoobj, za->za_name, 8, 1, &delta, tx); + if (err != 0) break; } zap_cursor_fini(&zc); + kmem_free(za, sizeof (*za)); return (err); } @@ -1177,12 +1150,11 @@ zap_increment(objset_t *os, uint64_t obj, const char *name, int64_t delta, dmu_tx_t *tx) { uint64_t value = 0; - int err; if (delta == 0) return (0); - err = zap_lookup(os, obj, name, 8, 1, &value); + int err = zap_lookup(os, obj, name, 8, 1, &value); if (err != 0 && err != ENOENT) return (err); value += delta; @@ -1286,7 +1258,6 @@ again: static void zap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs) { - int i, err; uint64_t lastblk = 0; /* @@ -1294,14 +1265,14 @@ zap_stats_ptrtbl(zap_t *zap, uint64_t *tbl, int len, zap_stats_t *zs) * can hold, then it'll be accounted for more than once, since * we won't have lastblk. */ - for (i = 0; i < len; i++) { + for (int i = 0; i < len; i++) { zap_leaf_t *l; if (tbl[i] == lastblk) continue; lastblk = tbl[i]; - err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l); + int err = zap_get_leaf_byblk(zap, tbl[i], NULL, RW_READER, &l); if (err == 0) { zap_leaf_stats(zap, l, zs); zap_put_leaf(l); @@ -1341,14 +1312,12 @@ 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 { - int b; - dmu_prefetch(zap->zap_objset, zap->zap_object, 0, zap_f_phys(zap)->zap_ptrtbl.zt_blk << bs, zap_f_phys(zap)->zap_ptrtbl.zt_numblks << bs, ZIO_PRIORITY_SYNC_READ); - for (b = 0; b < zap_f_phys(zap)->zap_ptrtbl.zt_numblks; + for (int b = 0; b < zap_f_phys(zap)->zap_ptrtbl.zt_numblks; b++) { dmu_buf_t *db; int err; diff --git a/module/zfs/zap_leaf.c b/module/zfs/zap_leaf.c index 661fd747b..d168ad29a 100644 --- a/module/zfs/zap_leaf.c +++ b/module/zfs/zap_leaf.c @@ -21,7 +21,7 @@ /* * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. - * Copyright (c) 2013, 2015 by Delphix. All rights reserved. + * Copyright (c) 2013, 2016 by Delphix. All rights reserved. * Copyright 2017 Nexenta Systems, Inc. */ @@ -109,7 +109,6 @@ ldv(int len, const void *addr) void zap_leaf_byteswap(zap_leaf_phys_t *buf, int size) { - int i; zap_leaf_t l; dmu_buf_t l_dbuf; @@ -125,10 +124,10 @@ zap_leaf_byteswap(zap_leaf_phys_t *buf, int size) buf->l_hdr.lh_prefix_len = BSWAP_16(buf->l_hdr.lh_prefix_len); buf->l_hdr.lh_freelist = BSWAP_16(buf->l_hdr.lh_freelist); - for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) + for (int i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(&l); i++) buf->l_hash[i] = BSWAP_16(buf->l_hash[i]); - for (i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) { + for (int i = 0; i < ZAP_LEAF_NUMCHUNKS(&l); i++) { zap_leaf_chunk_t *lc = &ZAP_LEAF_CHUNK(&l, i); struct zap_leaf_entry *le; @@ -165,14 +164,12 @@ zap_leaf_byteswap(zap_leaf_phys_t *buf, int size) void zap_leaf_init(zap_leaf_t *l, boolean_t sort) { - int i; - l->l_bs = highbit64(l->l_dbuf->db_size) - 1; zap_memset(&zap_leaf_phys(l)->l_hdr, 0, sizeof (struct zap_leaf_header)); zap_memset(zap_leaf_phys(l)->l_hash, CHAIN_END, 2*ZAP_LEAF_HASH_NUMENTRIES(l)); - for (i = 0; i < ZAP_LEAF_NUMCHUNKS(l); i++) { + for (int i = 0; i < ZAP_LEAF_NUMCHUNKS(l); i++) { ZAP_LEAF_CHUNK(l, i).l_free.lf_type = ZAP_CHUNK_FREE; ZAP_LEAF_CHUNK(l, i).l_free.lf_next = i+1; } @@ -191,11 +188,9 @@ zap_leaf_init(zap_leaf_t *l, boolean_t sort) static uint16_t zap_leaf_chunk_alloc(zap_leaf_t *l) { - int chunk; - ASSERT(zap_leaf_phys(l)->l_hdr.lh_nfree > 0); - chunk = zap_leaf_phys(l)->l_hdr.lh_freelist; + int chunk = zap_leaf_phys(l)->l_hdr.lh_freelist; ASSERT3U(chunk, <, ZAP_LEAF_NUMCHUNKS(l)); ASSERT3U(ZAP_LEAF_CHUNK(l, chunk).l_free.lf_type, ==, ZAP_CHUNK_FREE); @@ -235,7 +230,7 @@ zap_leaf_array_create(zap_leaf_t *l, const char *buf, uint16_t *chunkp = &chunk_head; int byten = 0; uint64_t value = 0; - int shift = (integer_size-1)*8; + int shift = (integer_size - 1) * 8; int len = num_integers; ASSERT3U(num_integers * integer_size, <, MAX_ARRAY_BYTES); @@ -243,10 +238,9 @@ zap_leaf_array_create(zap_leaf_t *l, const char *buf, while (len > 0) { uint16_t chunk = zap_leaf_chunk_alloc(l); struct zap_leaf_array *la = &ZAP_LEAF_CHUNK(l, chunk).l_array; - int i; la->la_type = ZAP_CHUNK_ARRAY; - for (i = 0; i < ZAP_LEAF_ARRAY_BYTES; i++) { + for (int i = 0; i < ZAP_LEAF_ARRAY_BYTES; i++) { if (byten == 0) value = ldv(integer_size, buf); la->la_array[i] = value >> shift; @@ -324,10 +318,9 @@ zap_leaf_array_read(zap_leaf_t *l, uint16_t chunk, while (len > 0) { struct zap_leaf_array *la = &ZAP_LEAF_CHUNK(l, chunk).l_array; - int i; ASSERT3U(chunk, <, ZAP_LEAF_NUMCHUNKS(l)); - for (i = 0; i < ZAP_LEAF_ARRAY_BYTES && len > 0; i++) { + for (int i = 0; i < ZAP_LEAF_ARRAY_BYTES && len > 0; i++) { value = (value << 8) | la->la_array[i]; byten++; if (byten == array_int_len) { @@ -350,16 +343,13 @@ zap_leaf_array_match(zap_leaf_t *l, zap_name_t *zn, int bseen = 0; if (zap_getflags(zn->zn_zap) & ZAP_FLAG_UINT64_KEY) { - uint64_t *thiskey; - boolean_t match; - + uint64_t *thiskey = + kmem_alloc(array_numints * sizeof (*thiskey), KM_SLEEP); ASSERT(zn->zn_key_intlen == sizeof (*thiskey)); - thiskey = kmem_alloc(array_numints * sizeof (*thiskey), - KM_SLEEP); zap_leaf_array_read(l, chunk, sizeof (*thiskey), array_numints, sizeof (*thiskey), array_numints, thiskey); - match = bcmp(thiskey, zn->zn_key_orig, + boolean_t match = bcmp(thiskey, zn->zn_key_orig, array_numints * sizeof (*thiskey)) == 0; kmem_free(thiskey, array_numints * sizeof (*thiskey)); return (match); @@ -368,11 +358,10 @@ zap_leaf_array_match(zap_leaf_t *l, zap_name_t *zn, ASSERT(zn->zn_key_intlen == 1); if (zn->zn_matchtype & MT_NORMALIZE) { char *thisname = kmem_alloc(array_numints, KM_SLEEP); - boolean_t match; zap_leaf_array_read(l, chunk, sizeof (char), array_numints, sizeof (char), array_numints, thisname); - match = zap_match(zn, thisname); + boolean_t match = zap_match(zn, thisname); kmem_free(thisname, array_numints); return (match); } @@ -403,12 +392,11 @@ zap_leaf_array_match(zap_leaf_t *l, zap_name_t *zn, int zap_leaf_lookup(zap_leaf_t *l, zap_name_t *zn, zap_entry_handle_t *zeh) { - uint16_t *chunkp; struct zap_leaf_entry *le; ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC); - for (chunkp = LEAF_HASH_ENTPTR(l, zn->zn_hash); + for (uint16_t *chunkp = LEAF_HASH_ENTPTR(l, zn->zn_hash); *chunkp != CHAIN_END; chunkp = &le->le_next) { uint16_t chunk = *chunkp; le = ZAP_LEAF_ENTRY(l, chunk); @@ -449,17 +437,15 @@ int zap_leaf_lookup_closest(zap_leaf_t *l, uint64_t h, uint32_t cd, zap_entry_handle_t *zeh) { - uint16_t chunk; uint64_t besth = -1ULL; uint32_t bestcd = -1U; uint16_t bestlh = ZAP_LEAF_HASH_NUMENTRIES(l)-1; - uint16_t lh; struct zap_leaf_entry *le; ASSERT3U(zap_leaf_phys(l)->l_hdr.lh_magic, ==, ZAP_LEAF_MAGIC); - for (lh = LEAF_HASH(l, h); lh <= bestlh; lh++) { - for (chunk = zap_leaf_phys(l)->l_hash[lh]; + for (uint16_t lh = LEAF_HASH(l, h); lh <= bestlh; lh++) { + for (uint16_t chunk = zap_leaf_phys(l)->l_hash[lh]; chunk != CHAIN_END; chunk = le->le_next) { le = ZAP_LEAF_ENTRY(l, chunk); @@ -532,11 +518,10 @@ int zap_entry_update(zap_entry_handle_t *zeh, uint8_t integer_size, uint64_t num_integers, const void *buf) { - int delta_chunks; zap_leaf_t *l = zeh->zeh_leaf; struct zap_leaf_entry *le = ZAP_LEAF_ENTRY(l, *zeh->zeh_chunkp); - delta_chunks = ZAP_LEAF_ARRAY_NCHUNKS(num_integers * integer_size) - + int delta_chunks = ZAP_LEAF_ARRAY_NCHUNKS(num_integers * integer_size) - ZAP_LEAF_ARRAY_NCHUNKS(le->le_value_numints * le->le_value_intlen); if ((int)zap_leaf_phys(l)->l_hdr.lh_nfree < delta_chunks) @@ -553,14 +538,12 @@ zap_entry_update(zap_entry_handle_t *zeh, void zap_entry_remove(zap_entry_handle_t *zeh) { - uint16_t entry_chunk; - struct zap_leaf_entry *le; zap_leaf_t *l = zeh->zeh_leaf; ASSERT3P(zeh->zeh_chunkp, !=, &zeh->zeh_fakechunk); - entry_chunk = *zeh->zeh_chunkp; - le = ZAP_LEAF_ENTRY(l, entry_chunk); + uint16_t entry_chunk = *zeh->zeh_chunkp; + struct zap_leaf_entry *le = ZAP_LEAF_ENTRY(l, entry_chunk); ASSERT3U(le->le_type, ==, ZAP_CHUNK_ENTRY); zap_leaf_array_free(l, &le->le_name_chunk); @@ -578,15 +561,12 @@ zap_entry_create(zap_leaf_t *l, zap_name_t *zn, uint32_t cd, zap_entry_handle_t *zeh) { uint16_t chunk; - uint16_t *chunkp; struct zap_leaf_entry *le; - uint64_t valuelen; - int numchunks; uint64_t h = zn->zn_hash; - valuelen = integer_size * num_integers; + uint64_t valuelen = integer_size * num_integers; - numchunks = 1 + ZAP_LEAF_ARRAY_NCHUNKS(zn->zn_key_orig_numints * + int numchunks = 1 + ZAP_LEAF_ARRAY_NCHUNKS(zn->zn_key_orig_numints * zn->zn_key_intlen) + ZAP_LEAF_ARRAY_NCHUNKS(valuelen); if (numchunks > ZAP_LEAF_NUMCHUNKS(l)) return (SET_ERROR(E2BIG)); @@ -648,7 +628,7 @@ zap_entry_create(zap_leaf_t *l, zap_name_t *zn, uint32_t cd, /* link it into the hash chain */ /* XXX if we did the search above, we could just use that */ - chunkp = zap_leaf_rehash_entry(l, chunk); + uint16_t *chunkp = zap_leaf_rehash_entry(l, chunk); zap_leaf_phys(l)->l_hdr.lh_nentries++; @@ -676,14 +656,13 @@ boolean_t zap_entry_normalization_conflict(zap_entry_handle_t *zeh, zap_name_t *zn, const char *name, zap_t *zap) { - uint64_t chunk; struct zap_leaf_entry *le; boolean_t allocdzn = B_FALSE; if (zap->zap_normflags == 0) return (B_FALSE); - for (chunk = *LEAF_HASH_ENTPTR(zeh->zeh_leaf, zeh->zeh_hash); + for (uint16_t chunk = *LEAF_HASH_ENTPTR(zeh->zeh_leaf, zeh->zeh_hash); chunk != CHAIN_END; chunk = le->le_next) { le = ZAP_LEAF_ENTRY(zeh->zeh_leaf, chunk); if (le->le_hash != zeh->zeh_hash) @@ -766,14 +745,11 @@ zap_leaf_transfer_array(zap_leaf_t *l, uint16_t chunk, zap_leaf_t *nl) static void zap_leaf_transfer_entry(zap_leaf_t *l, int entry, zap_leaf_t *nl) { - struct zap_leaf_entry *le, *nle; - uint16_t chunk; - - le = ZAP_LEAF_ENTRY(l, entry); + struct zap_leaf_entry *le = ZAP_LEAF_ENTRY(l, entry); ASSERT3U(le->le_type, ==, ZAP_CHUNK_ENTRY); - chunk = zap_leaf_chunk_alloc(nl); - nle = ZAP_LEAF_ENTRY(nl, chunk); + uint16_t chunk = zap_leaf_chunk_alloc(nl); + struct zap_leaf_entry *nle = ZAP_LEAF_ENTRY(nl, chunk); *nle = *le; /* structure assignment */ (void) zap_leaf_rehash_entry(nl, chunk); @@ -794,7 +770,6 @@ zap_leaf_transfer_entry(zap_leaf_t *l, int entry, zap_leaf_t *nl) void zap_leaf_split(zap_leaf_t *l, zap_leaf_t *nl, boolean_t sort) { - int i; int bit = 64 - 1 - zap_leaf_phys(l)->l_hdr.lh_prefix_len; /* set new prefix and prefix_len */ @@ -821,7 +796,7 @@ zap_leaf_split(zap_leaf_t *l, zap_leaf_t *nl, boolean_t sort) * but this accesses memory more sequentially, and when we're * called, the block is usually pretty full. */ - for (i = 0; i < ZAP_LEAF_NUMCHUNKS(l); i++) { + for (int i = 0; i < ZAP_LEAF_NUMCHUNKS(l); i++) { struct zap_leaf_entry *le = ZAP_LEAF_ENTRY(l, i); if (le->le_type != ZAP_CHUNK_ENTRY) continue; @@ -836,9 +811,7 @@ zap_leaf_split(zap_leaf_t *l, zap_leaf_t *nl, boolean_t sort) void zap_leaf_stats(zap_t *zap, zap_leaf_t *l, zap_stats_t *zs) { - int i, n; - - n = zap_f_phys(zap)->zap_ptrtbl.zt_shift - + int n = zap_f_phys(zap)->zap_ptrtbl.zt_shift - zap_leaf_phys(l)->l_hdr.lh_prefix_len; n = MIN(n, ZAP_HISTOGRAM_SIZE-1); zs->zs_leafs_with_2n_pointers[n]++; @@ -854,7 +827,7 @@ zap_leaf_stats(zap_t *zap, zap_leaf_t *l, zap_stats_t *zs) n = MIN(n, ZAP_HISTOGRAM_SIZE-1); zs->zs_blocks_n_tenths_full[n]++; - for (i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(l); i++) { + for (int i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(l); i++) { int nentries = 0; int chunk = zap_leaf_phys(l)->l_hash[i]; diff --git a/module/zfs/zap_micro.c b/module/zfs/zap_micro.c index 6ab2551b6..a628cb881 100644 --- a/module/zfs/zap_micro.c +++ b/module/zfs/zap_micro.c @@ -88,22 +88,20 @@ zap_hash(zap_name_t *zn) ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY); if (zap_getflags(zap) & ZAP_FLAG_UINT64_KEY) { - int i; const uint64_t *wp = zn->zn_key_norm; ASSERT(zn->zn_key_intlen == 8); - for (i = 0; i < zn->zn_key_norm_numints; wp++, i++) { - int j; + for (int i = 0; i < zn->zn_key_norm_numints; + wp++, i++) { uint64_t word = *wp; - for (j = 0; j < zn->zn_key_intlen; j++) { + for (int j = 0; j < zn->zn_key_intlen; j++) { h = (h >> 8) ^ zfs_crc64_table[(h ^ word) & 0xFF]; word >>= NBBY; } } } else { - int i, len; const uint8_t *cp = zn->zn_key_norm; /* @@ -113,10 +111,10 @@ zap_hash(zap_name_t *zn) * zn_key_*_numints includes the terminating * null for non-binary keys.) */ - len = zn->zn_key_norm_numints - 1; + int len = zn->zn_key_norm_numints - 1; ASSERT(zn->zn_key_intlen == 1); - for (i = 0; i < len; cp++, i++) { + for (int i = 0; i < len; cp++, i++) { h = (h >> 8) ^ zfs_crc64_table[(h ^ *cp) & 0xFF]; } @@ -136,15 +134,12 @@ zap_hash(zap_name_t *zn) static int zap_normalize(zap_t *zap, const char *name, char *namenorm, int normflags) { - size_t inlen, outlen; - int err; - ASSERT(!(zap_getflags(zap) & ZAP_FLAG_UINT64_KEY)); - inlen = strlen(name) + 1; - outlen = ZAP_MAXNAMELEN; + size_t inlen = strlen(name) + 1; + size_t outlen = ZAP_MAXNAMELEN; - err = 0; + int err = 0; (void) u8_textprep_str((char *)name, &inlen, namenorm, &outlen, normflags | U8_TEXTPREP_IGNORE_NULL | U8_TEXTPREP_IGNORE_INVALID, U8_UNICODE_LATEST, &err); @@ -254,12 +249,11 @@ zap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints) static void mzap_byteswap(mzap_phys_t *buf, size_t size) { - int i, max; buf->mz_block_type = BSWAP_64(buf->mz_block_type); buf->mz_salt = BSWAP_64(buf->mz_salt); buf->mz_normflags = BSWAP_64(buf->mz_normflags); - max = (size / MZAP_ENT_LEN) - 1; - for (i = 0; i < max; i++) { + int max = (size / MZAP_ENT_LEN) - 1; + for (int i = 0; i < max; i++) { buf->mz_chunk[i].mze_value = BSWAP_64(buf->mz_chunk[i].mze_value); buf->mz_chunk[i].mze_cd = @@ -270,9 +264,7 @@ mzap_byteswap(mzap_phys_t *buf, size_t size) void zap_byteswap(void *buf, size_t size) { - uint64_t block_type; - - block_type = *(uint64_t *)buf; + uint64_t block_type = *(uint64_t *)buf; if (block_type == ZBT_MICRO || block_type == BSWAP_64(ZBT_MICRO)) { /* ASSERT(magic == ZAP_LEAF_MAGIC); */ @@ -298,12 +290,10 @@ mze_compare(const void *arg1, const void *arg2) static void mze_insert(zap_t *zap, int chunkid, uint64_t hash) { - mzap_ent_t *mze; - ASSERT(zap->zap_ismicro); ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); - mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); + mzap_ent_t *mze = kmem_alloc(sizeof (mzap_ent_t), KM_SLEEP); mze->mze_chunkid = chunkid; mze->mze_hash = hash; mze->mze_cd = MZE_PHYS(zap, mze)->mze_cd; @@ -341,10 +331,8 @@ static uint32_t mze_find_unused_cd(zap_t *zap, uint64_t hash) { mzap_ent_t mze_tofind; - mzap_ent_t *mze; avl_index_t idx; avl_tree_t *avl = &zap->zap_m.zap_avl; - uint32_t cd; ASSERT(zap->zap_ismicro); ASSERT(RW_LOCK_HELD(&zap->zap_rwlock)); @@ -352,8 +340,8 @@ mze_find_unused_cd(zap_t *zap, uint64_t hash) mze_tofind.mze_hash = hash; mze_tofind.mze_cd = 0; - cd = 0; - for (mze = avl_find(avl, &mze_tofind, &idx); + uint32_t cd = 0; + for (mzap_ent_t *mze = avl_find(avl, &mze_tofind, &idx); mze && mze->mze_hash == hash; mze = AVL_NEXT(avl, mze)) { if (mze->mze_cd != cd) break; @@ -423,15 +411,13 @@ static zap_t * mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) { zap_t *winner; - zap_t *zap; - int i; uint64_t *zap_hdr = (uint64_t *)db->db_data; uint64_t zap_block_type = zap_hdr[0]; uint64_t zap_magic = zap_hdr[1]; ASSERT3U(MZAP_ENT_LEN, ==, sizeof (mzap_ent_phys_t)); - zap = kmem_zalloc(sizeof (zap_t), KM_SLEEP); + 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; @@ -468,7 +454,7 @@ mzap_open(objset_t *os, uint64_t obj, dmu_buf_t *db) avl_create(&zap->zap_m.zap_avl, mze_compare, sizeof (mzap_ent_t), offsetof(mzap_ent_t, mze_node)); - for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { + for (int i = 0; i < zap->zap_m.zap_num_chunks; i++) { mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; if (mze->mze_name[0]) { @@ -519,21 +505,18 @@ static int zap_lockdir_impl(dmu_buf_t *db, void *tag, dmu_tx_t *tx, krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp) { - dmu_object_info_t doi; - zap_t *zap; - krw_t lt; - + ASSERT0(db->db_offset); objset_t *os = dmu_buf_get_objset(db); uint64_t obj = db->db_object; + dmu_object_info_t doi; - ASSERT0(db->db_offset); *zapp = NULL; dmu_object_info_from_db(db, &doi); if (DMU_OT_BYTESWAP(doi.doi_type) != DMU_BSWAP_ZAP) return (SET_ERROR(EINVAL)); - zap = dmu_buf_get_user(db); + zap_t *zap = dmu_buf_get_user(db); if (zap == NULL) { zap = mzap_open(os, obj, db); if (zap == NULL) { @@ -552,7 +535,7 @@ zap_lockdir_impl(dmu_buf_t *db, void *tag, dmu_tx_t *tx, * can only be different if it was upgraded from micro to fat, * and micro wanted WRITER but fat only needs READER. */ - lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; + krw_t lt = (!zap->zap_ismicro && fatreader) ? RW_READER : lti; rw_enter(&zap->zap_rwlock, lt); if (lt != ((!zap->zap_ismicro && fatreader) ? RW_READER : lti)) { /* it was upgraded, now we only need reader */ @@ -598,9 +581,8 @@ zap_lockdir_by_dnode(dnode_t *dn, dmu_tx_t *tx, krw_t lti, boolean_t fatreader, boolean_t adding, void *tag, zap_t **zapp) { dmu_buf_t *db; - int err; - err = dmu_buf_hold_by_dnode(dn, 0, tag, &db, DMU_READ_NO_PREFETCH); + int err = dmu_buf_hold_by_dnode(dn, 0, tag, &db, DMU_READ_NO_PREFETCH); if (err != 0) { return (err); } @@ -616,9 +598,8 @@ zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx, krw_t lti, boolean_t fatreader, boolean_t adding, void *tag, zap_t **zapp) { dmu_buf_t *db; - int err; - err = dmu_buf_hold(os, obj, 0, tag, &db, DMU_READ_NO_PREFETCH); + int err = dmu_buf_hold(os, obj, 0, tag, &db, DMU_READ_NO_PREFETCH); if (err != 0) return (err); err = zap_lockdir_impl(db, tag, tx, lti, fatreader, adding, zapp); @@ -637,22 +618,20 @@ zap_unlockdir(zap_t *zap, void *tag) static int mzap_upgrade(zap_t **zapp, void *tag, dmu_tx_t *tx, zap_flags_t flags) { - mzap_phys_t *mzp; - int i, sz, nchunks; int err = 0; zap_t *zap = *zapp; ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); - sz = zap->zap_dbuf->db_size; - mzp = vmem_alloc(sz, KM_SLEEP); + int sz = zap->zap_dbuf->db_size; + mzap_phys_t *mzp = vmem_alloc(sz, KM_SLEEP); bcopy(zap->zap_dbuf->db_data, mzp, sz); - nchunks = zap->zap_m.zap_num_chunks; + int nchunks = zap->zap_m.zap_num_chunks; if (!flags) { err = dmu_object_set_blocksize(zap->zap_objset, zap->zap_object, 1ULL << fzap_default_block_shift, 0, tx); - if (err) { + if (err != 0) { vmem_free(mzp, sz); return (err); } @@ -665,14 +644,13 @@ mzap_upgrade(zap_t **zapp, void *tag, dmu_tx_t *tx, zap_flags_t flags) fzap_upgrade(zap, tx, flags); - for (i = 0; i < nchunks; i++) { + for (int i = 0; i < nchunks; i++) { mzap_ent_phys_t *mze = &mzp->mz_chunk[i]; - zap_name_t *zn; if (mze->mze_name[0] == 0) continue; dprintf("adding %s=%llu\n", mze->mze_name, mze->mze_value); - zn = zap_name_alloc(zap, mze->mze_name, 0); + zap_name_t *zn = zap_name_alloc(zap, mze->mze_name, 0); /* If we fail here, we would end up losing entries */ VERIFY0(fzap_add_cd(zn, 8, 1, &mze->mze_value, mze->mze_cd, tag, tx)); @@ -706,7 +684,6 @@ mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags, dmu_tx_t *tx) { dmu_buf_t *db; - mzap_phys_t *zp; VERIFY0(dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH)); @@ -719,7 +696,7 @@ mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags, #endif dmu_buf_will_dirty(db, tx); - zp = db->db_data; + mzap_phys_t *zp = db->db_data; zp->mz_block_type = ZBT_MICRO; zp->mz_salt = ((uintptr_t)db ^ (uintptr_t)tx ^ (obj << 1)) | 1ULL; zp->mz_normflags = normflags; @@ -730,7 +707,7 @@ mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags, /* Only fat zap supports flags; upgrade immediately. */ VERIFY(0 == zap_lockdir(os, obj, tx, RW_WRITER, B_FALSE, B_FALSE, FTAG, &zap)); - VERIFY3U(0, ==, mzap_upgrade(&zap, FTAG, tx, flags)); + VERIFY0(mzap_upgrade(&zap, FTAG, tx, flags)); zap_unlockdir(zap, FTAG); } } @@ -765,9 +742,7 @@ zap_create_claim_norm_dnsize(objset_t *os, uint64_t obj, int normflags, dmu_object_type_t ot, dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx) { - int err; - - err = dmu_object_claim_dnsize(os, obj, ot, 0, bonustype, bonuslen, + int err = dmu_object_claim_dnsize(os, obj, ot, 0, bonustype, bonuslen, dnodesize, tx); if (err != 0) return (err); @@ -869,10 +844,10 @@ int zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) { zap_t *zap; - int err; - err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); - if (err) + int err = + zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); + if (err != 0) return (err); if (!zap->zap_ismicro) { err = fzap_count(zap, count); @@ -890,7 +865,6 @@ zap_count(objset_t *os, uint64_t zapobj, uint64_t *count) static boolean_t mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) { - mzap_ent_t *other; int direction = AVL_BEFORE; boolean_t allocdzn = B_FALSE; @@ -898,7 +872,7 @@ mzap_normalization_conflict(zap_t *zap, zap_name_t *zn, mzap_ent_t *mze) return (B_FALSE); again: - for (other = avl_walk(&zap->zap_m.zap_avl, mze, direction); + for (mzap_ent_t *other = avl_walk(&zap->zap_m.zap_avl, mze, direction); other && other->mze_hash == mze->mze_hash; other = avl_walk(&zap->zap_m.zap_avl, other, direction)) { @@ -943,10 +917,8 @@ zap_lookup_impl(zap_t *zap, const char *name, boolean_t *ncp) { int err = 0; - mzap_ent_t *mze; - zap_name_t *zn; - zn = zap_name_alloc(zap, name, mt); + zap_name_t *zn = zap_name_alloc(zap, name, mt); if (zn == NULL) return (SET_ERROR(ENOTSUP)); @@ -954,7 +926,7 @@ zap_lookup_impl(zap_t *zap, const char *name, err = fzap_lookup(zn, integer_size, num_integers, buf, realname, rn_len, ncp); } else { - mze = mze_find(zn); + mzap_ent_t *mze = mze_find(zn); if (mze == NULL) { err = SET_ERROR(ENOENT); } else { @@ -985,9 +957,9 @@ zap_lookup_norm(objset_t *os, uint64_t zapobj, const char *name, boolean_t *ncp) { zap_t *zap; - int err; - err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); + int err = + zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); if (err != 0) return (err); err = zap_lookup_impl(zap, name, integer_size, @@ -1033,9 +1005,8 @@ zap_lookup_norm_by_dnode(dnode_t *dn, const char *name, boolean_t *ncp) { zap_t *zap; - int err; - err = zap_lockdir_by_dnode(dn, NULL, RW_READER, TRUE, FALSE, + int err = zap_lockdir_by_dnode(dn, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); if (err != 0) return (err); @@ -1050,13 +1021,12 @@ zap_prefetch_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, int key_numints) { zap_t *zap; - int err; - zap_name_t *zn; - err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); - if (err) + int err = + zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); + if (err != 0) return (err); - zn = zap_name_alloc_uint64(zap, key, key_numints); + zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints); if (zn == NULL) { zap_unlockdir(zap, FTAG); return (SET_ERROR(ENOTSUP)); @@ -1073,13 +1043,12 @@ zap_lookup_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, int key_numints, uint64_t integer_size, uint64_t num_integers, void *buf) { zap_t *zap; - int err; - zap_name_t *zn; - err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); - if (err) + int err = + zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); + if (err != 0) return (err); - zn = zap_name_alloc_uint64(zap, key, key_numints); + zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints); if (zn == NULL) { zap_unlockdir(zap, FTAG); return (SET_ERROR(ENOTSUP)); @@ -1107,14 +1076,12 @@ zap_length(objset_t *os, uint64_t zapobj, const char *name, uint64_t *integer_size, uint64_t *num_integers) { zap_t *zap; - int err; - mzap_ent_t *mze; - zap_name_t *zn; - err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); - if (err) + int err = + zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); + if (err != 0) return (err); - zn = zap_name_alloc(zap, name, 0); + zap_name_t *zn = zap_name_alloc(zap, name, 0); if (zn == NULL) { zap_unlockdir(zap, FTAG); return (SET_ERROR(ENOTSUP)); @@ -1122,7 +1089,7 @@ zap_length(objset_t *os, uint64_t zapobj, const char *name, if (!zap->zap_ismicro) { err = fzap_length(zn, integer_size, num_integers); } else { - mze = mze_find(zn); + mzap_ent_t *mze = mze_find(zn); if (mze == NULL) { err = SET_ERROR(ENOENT); } else { @@ -1142,13 +1109,12 @@ zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, int key_numints, uint64_t *integer_size, uint64_t *num_integers) { zap_t *zap; - int err; - zap_name_t *zn; - err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); - if (err) + int err = + zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); + if (err != 0) return (err); - zn = zap_name_alloc_uint64(zap, key, key_numints); + zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints); if (zn == NULL) { zap_unlockdir(zap, FTAG); return (SET_ERROR(ENOTSUP)); @@ -1162,27 +1128,24 @@ zap_length_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, static void mzap_addent(zap_name_t *zn, uint64_t value) { - int i; zap_t *zap = zn->zn_zap; int start = zap->zap_m.zap_alloc_next; - uint32_t cd; ASSERT(RW_WRITE_HELD(&zap->zap_rwlock)); #ifdef ZFS_DEBUG - for (i = 0; i < zap->zap_m.zap_num_chunks; i++) { - ASSERTV(mzap_ent_phys_t *mze); - ASSERT(mze = &zap_m_phys(zap)->mz_chunk[i]); + for (int i = 0; i < zap->zap_m.zap_num_chunks; i++) { + mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; ASSERT(strcmp(zn->zn_key_orig, mze->mze_name) != 0); } #endif - cd = mze_find_unused_cd(zap, zn->zn_hash); + uint32_t cd = mze_find_unused_cd(zap, zn->zn_hash); /* given the limited size of the microzap, this can't happen */ ASSERT(cd < zap_maxcd(zap)); again: - for (i = start; i < zap->zap_m.zap_num_chunks; i++) { + for (int i = start; i < zap->zap_m.zap_num_chunks; i++) { mzap_ent_phys_t *mze = &zap_m_phys(zap)->mz_chunk[i]; if (mze->mze_name[0] == 0) { mze->mze_value = value; @@ -1210,12 +1173,10 @@ zap_add_impl(zap_t *zap, const char *key, int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx, void *tag) { - int err = 0; - mzap_ent_t *mze; const uint64_t *intval = val; - zap_name_t *zn; + int err = 0; - zn = zap_name_alloc(zap, key, 0); + zap_name_t *zn = zap_name_alloc(zap, key, 0); if (zn == NULL) { zap_unlockdir(zap, tag); return (SET_ERROR(ENOTSUP)); @@ -1233,8 +1194,7 @@ zap_add_impl(zap_t *zap, const char *key, } zap = zn->zn_zap; /* fzap_add() may change zap */ } else { - mze = mze_find(zn); - if (mze != NULL) { + if (mze_find(zn) != NULL) { err = SET_ERROR(EEXIST); } else { mzap_addent(zn, *intval); @@ -1285,13 +1245,12 @@ zap_add_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, const void *val, dmu_tx_t *tx) { zap_t *zap; - int err; - zap_name_t *zn; - err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); - if (err) + int err = + zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); + if (err != 0) return (err); - zn = zap_name_alloc_uint64(zap, key, key_numints); + zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints); if (zn == NULL) { zap_unlockdir(zap, FTAG); return (SET_ERROR(ENOTSUP)); @@ -1309,13 +1268,10 @@ zap_update(objset_t *os, uint64_t zapobj, const char *name, int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) { zap_t *zap; - mzap_ent_t *mze; + ASSERTV(uint64_t oldval); const uint64_t *intval = val; - zap_name_t *zn; - int err; #ifdef ZFS_DEBUG - uint64_t oldval; /* * If there is an old value, it shouldn't change across the @@ -1325,10 +1281,11 @@ zap_update(objset_t *os, uint64_t zapobj, const char *name, (void) zap_lookup(os, zapobj, name, 8, 1, &oldval); #endif - err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); - if (err) + int err = + zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); + if (err != 0) return (err); - zn = zap_name_alloc(zap, name, 0); + zap_name_t *zn = zap_name_alloc(zap, name, 0); if (zn == NULL) { zap_unlockdir(zap, FTAG); return (SET_ERROR(ENOTSUP)); @@ -1348,7 +1305,7 @@ zap_update(objset_t *os, uint64_t zapobj, const char *name, } zap = zn->zn_zap; /* fzap_update() may change zap */ } else { - mze = mze_find(zn); + mzap_ent_t *mze = mze_find(zn); if (mze != NULL) { ASSERT3U(MZE_PHYS(zap, mze)->mze_value, ==, oldval); MZE_PHYS(zap, mze)->mze_value = *intval; @@ -1369,13 +1326,12 @@ zap_update_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, int integer_size, uint64_t num_integers, const void *val, dmu_tx_t *tx) { zap_t *zap; - zap_name_t *zn; - int err; - err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); - if (err) + int err = + zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, TRUE, FTAG, &zap); + if (err != 0) return (err); - zn = zap_name_alloc_uint64(zap, key, key_numints); + zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints); if (zn == NULL) { zap_unlockdir(zap, FTAG); return (SET_ERROR(ENOTSUP)); @@ -1398,17 +1354,15 @@ static int zap_remove_impl(zap_t *zap, const char *name, matchtype_t mt, dmu_tx_t *tx) { - mzap_ent_t *mze; - zap_name_t *zn; int err = 0; - zn = zap_name_alloc(zap, name, mt); + zap_name_t *zn = zap_name_alloc(zap, name, mt); if (zn == NULL) return (SET_ERROR(ENOTSUP)); if (!zap->zap_ismicro) { err = fzap_remove(zn, tx); } else { - mze = mze_find(zn); + mzap_ent_t *mze = mze_find(zn); if (mze == NULL) { err = SET_ERROR(ENOENT); } else { @@ -1456,13 +1410,12 @@ zap_remove_uint64(objset_t *os, uint64_t zapobj, const uint64_t *key, int key_numints, dmu_tx_t *tx) { zap_t *zap; - int err; - zap_name_t *zn; - err = zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap); - if (err) + int err = + zap_lockdir(os, zapobj, tx, RW_WRITER, TRUE, FALSE, FTAG, &zap); + if (err != 0) return (err); - zn = zap_name_alloc_uint64(zap, key, key_numints); + zap_name_t *zn = zap_name_alloc_uint64(zap, key, key_numints); if (zn == NULL) { zap_unlockdir(zap, FTAG); return (SET_ERROR(ENOTSUP)); @@ -1538,9 +1491,6 @@ int zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) { int err; - avl_index_t idx; - mzap_ent_t mze_tofind; - mzap_ent_t *mze; if (zc->zc_hash == -1ULL) return (SET_ERROR(ENOENT)); @@ -1549,7 +1499,7 @@ zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) int hb; err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL, RW_READER, TRUE, FALSE, NULL, &zc->zc_zap); - if (err) + if (err != 0) return (err); /* @@ -1569,10 +1519,14 @@ zap_cursor_retrieve(zap_cursor_t *zc, zap_attribute_t *za) if (!zc->zc_zap->zap_ismicro) { err = fzap_cursor_retrieve(zc->zc_zap, zc, za); } else { + avl_index_t idx; + mzap_ent_t mze_tofind; + mze_tofind.mze_hash = zc->zc_hash; mze_tofind.mze_cd = zc->zc_cd; - mze = avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); + mzap_ent_t *mze = + avl_find(&zc->zc_zap->zap_m.zap_avl, &mze_tofind, &idx); if (mze == NULL) { mze = avl_nearest(&zc->zc_zap->zap_m.zap_avl, idx, AVL_AFTER); @@ -1609,11 +1563,11 @@ zap_cursor_advance(zap_cursor_t *zc) int zap_get_stats(objset_t *os, uint64_t zapobj, zap_stats_t *zs) { - int err; zap_t *zap; - err = zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); - if (err) + int err = + zap_lockdir(os, zapobj, NULL, RW_READER, TRUE, FALSE, FTAG, &zap); + if (err != 0) return (err); bzero(zs, sizeof (zap_stats_t)); |