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-rw-r--r--include/sys/dmu.h10
-rw-r--r--include/sys/zap.h9
-rw-r--r--module/zfs/dmu.c31
-rw-r--r--module/zfs/dmu_object.c54
-rw-r--r--module/zfs/dmu_recv.c7
-rw-r--r--module/zfs/zap_micro.c94
6 files changed, 149 insertions, 56 deletions
diff --git a/include/sys/dmu.h b/include/sys/dmu.h
index f8b5f096a..542eff95f 100644
--- a/include/sys/dmu.h
+++ b/include/sys/dmu.h
@@ -407,6 +407,10 @@ uint64_t dmu_object_alloc_ibs(objset_t *os, dmu_object_type_t ot, int blocksize,
uint64_t dmu_object_alloc_dnsize(objset_t *os, dmu_object_type_t ot,
int blocksize, dmu_object_type_t bonus_type, int bonus_len,
int dnodesize, dmu_tx_t *tx);
+uint64_t dmu_object_alloc_hold(objset_t *os, dmu_object_type_t ot,
+ int blocksize, int indirect_blockshift, dmu_object_type_t bonustype,
+ int bonuslen, int dnodesize, dnode_t **allocated_dnode, void *tag,
+ dmu_tx_t *tx);
int dmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot,
int blocksize, dmu_object_type_t bonus_type, int bonus_len, dmu_tx_t *tx);
int dmu_object_claim_dnsize(objset_t *os, uint64_t object, dmu_object_type_t ot,
@@ -521,9 +525,9 @@ void dmu_write_policy(objset_t *os, dnode_t *dn, int level, int wp,
*
* Returns ENOENT, EIO, or 0.
*/
-int dmu_bonus_hold_impl(objset_t *os, uint64_t object, void *tag,
- uint32_t flags, dmu_buf_t **dbp);
-int dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **);
+int dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **dbp);
+int dmu_bonus_hold_by_dnode(dnode_t *dn, void *tag, dmu_buf_t **dbp,
+ uint32_t flags);
int dmu_bonus_max(void);
int dmu_set_bonus(dmu_buf_t *, int, dmu_tx_t *);
int dmu_set_bonustype(dmu_buf_t *, dmu_object_type_t, dmu_tx_t *);
diff --git a/include/sys/zap.h b/include/sys/zap.h
index 7acc3becb..ab13652d8 100644
--- a/include/sys/zap.h
+++ b/include/sys/zap.h
@@ -131,6 +131,11 @@ uint64_t zap_create_flags_dnsize(objset_t *os, int normflags,
zap_flags_t flags, dmu_object_type_t ot, int leaf_blockshift,
int indirect_blockshift, dmu_object_type_t bonustype, int bonuslen,
int dnodesize, dmu_tx_t *tx);
+uint64_t zap_create_hold(objset_t *os, int normflags, zap_flags_t flags,
+ dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift,
+ dmu_object_type_t bonustype, int bonuslen, int dnodesize,
+ dnode_t **allocated_dnode, void *tag, dmu_tx_t *tx);
+
uint64_t zap_create_link(objset_t *os, dmu_object_type_t ot,
uint64_t parent_obj, const char *name, dmu_tx_t *tx);
uint64_t zap_create_link_dnsize(objset_t *os, dmu_object_type_t ot,
@@ -139,8 +144,8 @@ uint64_t zap_create_link_dnsize(objset_t *os, dmu_object_type_t ot,
/*
* Initialize an already-allocated object.
*/
-void mzap_create_impl(objset_t *os, uint64_t obj, int normflags,
- zap_flags_t flags, dmu_tx_t *tx);
+void mzap_create_impl(dnode_t *dn, int normflags, zap_flags_t flags,
+ dmu_tx_t *tx);
/*
* Create a new zapobj with no attributes from the given (unallocated)
diff --git a/module/zfs/dmu.c b/module/zfs/dmu.c
index e8d0ce3be..5b79eb907 100644
--- a/module/zfs/dmu.c
+++ b/module/zfs/dmu.c
@@ -330,13 +330,13 @@ dmu_rm_spill(objset_t *os, uint64_t object, dmu_tx_t *tx)
}
/*
- * returns ENOENT, EIO, or 0.
+ * Lookup and hold the bonus buffer for the provided dnode. If the dnode
+ * has not yet been allocated a new bonus dbuf a will be allocated.
+ * Returns ENOENT, EIO, or 0.
*/
-int
-dmu_bonus_hold_impl(objset_t *os, uint64_t object, void *tag, uint32_t flags,
- dmu_buf_t **dbp)
+int dmu_bonus_hold_by_dnode(dnode_t *dn, void *tag, dmu_buf_t **dbp,
+ uint32_t flags)
{
- dnode_t *dn;
dmu_buf_impl_t *db;
int error;
uint32_t db_flags = DB_RF_MUST_SUCCEED;
@@ -346,10 +346,6 @@ dmu_bonus_hold_impl(objset_t *os, uint64_t object, void *tag, uint32_t flags,
if (flags & DMU_READ_NO_DECRYPT)
db_flags |= DB_RF_NO_DECRYPT;
- error = dnode_hold(os, object, FTAG, &dn);
- if (error)
- return (error);
-
rw_enter(&dn->dn_struct_rwlock, RW_READER);
if (dn->dn_bonus == NULL) {
rw_exit(&dn->dn_struct_rwlock);
@@ -372,8 +368,6 @@ dmu_bonus_hold_impl(objset_t *os, uint64_t object, void *tag, uint32_t flags,
*/
rw_exit(&dn->dn_struct_rwlock);
- dnode_rele(dn, FTAG);
-
error = dbuf_read(db, NULL, db_flags);
if (error) {
dnode_evict_bonus(dn);
@@ -387,9 +381,19 @@ dmu_bonus_hold_impl(objset_t *os, uint64_t object, void *tag, uint32_t flags,
}
int
-dmu_bonus_hold(objset_t *os, uint64_t obj, void *tag, dmu_buf_t **dbp)
+dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **dbp)
{
- return (dmu_bonus_hold_impl(os, obj, tag, DMU_READ_NO_PREFETCH, dbp));
+ dnode_t *dn;
+ int error;
+
+ error = dnode_hold(os, object, FTAG, &dn);
+ if (error)
+ return (error);
+
+ error = dmu_bonus_hold_by_dnode(dn, tag, dbp, DMU_READ_NO_PREFETCH);
+ dnode_rele(dn, FTAG);
+
+ return (error);
}
/*
@@ -2547,6 +2551,7 @@ dmu_fini(void)
#if defined(_KERNEL)
EXPORT_SYMBOL(dmu_bonus_hold);
+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);
diff --git a/module/zfs/dmu_object.c b/module/zfs/dmu_object.c
index 9b5cf125f..e77ebeca5 100644
--- a/module/zfs/dmu_object.c
+++ b/module/zfs/dmu_object.c
@@ -44,7 +44,7 @@ int dmu_object_alloc_chunk_shift = 7;
static uint64_t
dmu_object_alloc_impl(objset_t *os, dmu_object_type_t ot, int blocksize,
int indirect_blockshift, dmu_object_type_t bonustype, int bonuslen,
- int dnodesize, dmu_tx_t *tx)
+ int dnodesize, dnode_t **allocated_dnode, void *tag, dmu_tx_t *tx)
{
uint64_t object;
uint64_t L1_dnode_count = DNODES_PER_BLOCK <<
@@ -80,6 +80,19 @@ dmu_object_alloc_impl(objset_t *os, dmu_object_type_t ot, int blocksize,
if (dnodes_per_chunk > L1_dnode_count)
dnodes_per_chunk = L1_dnode_count;
+ /*
+ * The caller requested the dnode be returned as a performance
+ * optimization in order to avoid releasing the hold only to
+ * immediately reacquire it. Since they caller is responsible
+ * for releasing the hold they must provide the tag.
+ */
+ if (allocated_dnode != NULL) {
+ ASSERT3P(tag, !=, NULL);
+ } else {
+ ASSERT3P(tag, ==, NULL);
+ tag = FTAG;
+ }
+
object = *cpuobj;
for (;;) {
/*
@@ -167,7 +180,7 @@ dmu_object_alloc_impl(objset_t *os, dmu_object_type_t ot, int blocksize,
* to do so.
*/
error = dnode_hold_impl(os, object, DNODE_MUST_BE_FREE,
- dn_slots, FTAG, &dn);
+ dn_slots, tag, &dn);
if (error == 0) {
rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
/*
@@ -180,11 +193,20 @@ dmu_object_alloc_impl(objset_t *os, dmu_object_type_t ot, int blocksize,
bonuslen, dn_slots, tx);
rw_exit(&dn->dn_struct_rwlock);
dmu_tx_add_new_object(tx, dn);
- dnode_rele(dn, FTAG);
+
+ /*
+ * Caller requested the allocated dnode be
+ * returned and is responsible for the hold.
+ */
+ if (allocated_dnode != NULL)
+ *allocated_dnode = dn;
+ else
+ dnode_rele(dn, tag);
+
return (object);
}
rw_exit(&dn->dn_struct_rwlock);
- dnode_rele(dn, FTAG);
+ dnode_rele(dn, tag);
DNODE_STAT_BUMP(dnode_alloc_race);
}
@@ -205,7 +227,7 @@ dmu_object_alloc(objset_t *os, dmu_object_type_t ot, int blocksize,
dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
{
return dmu_object_alloc_impl(os, ot, blocksize, 0, bonustype,
- bonuslen, 0, tx);
+ bonuslen, 0, NULL, NULL, tx);
}
uint64_t
@@ -214,7 +236,7 @@ dmu_object_alloc_ibs(objset_t *os, dmu_object_type_t ot, int blocksize,
dmu_tx_t *tx)
{
return dmu_object_alloc_impl(os, ot, blocksize, indirect_blockshift,
- bonustype, bonuslen, 0, tx);
+ bonustype, bonuslen, 0, NULL, NULL, tx);
}
uint64_t
@@ -222,7 +244,21 @@ dmu_object_alloc_dnsize(objset_t *os, dmu_object_type_t ot, int blocksize,
dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx)
{
return (dmu_object_alloc_impl(os, ot, blocksize, 0, bonustype,
- bonuslen, dnodesize, tx));
+ bonuslen, dnodesize, NULL, NULL, tx));
+}
+
+/*
+ * Allocate a new object and return a pointer to the newly allocated dnode
+ * via the allocated_dnode argument. The returned dnode will be held and
+ * the caller is responsible for releasing the hold by calling dnode_rele().
+ */
+uint64_t
+dmu_object_alloc_hold(objset_t *os, dmu_object_type_t ot, int blocksize,
+ int indirect_blockshift, dmu_object_type_t bonustype, int bonuslen,
+ int dnodesize, dnode_t **allocated_dnode, void *tag, dmu_tx_t *tx)
+{
+ return (dmu_object_alloc_impl(os, ot, blocksize, indirect_blockshift,
+ bonustype, bonuslen, dnodesize, allocated_dnode, tag, tx));
}
int
@@ -414,14 +450,13 @@ dmu_object_zapify(objset_t *mos, uint64_t object, dmu_object_type_t old_type,
* so that concurrent calls to *_is_zapified() can determine if
* the object has been completely zapified by checking the type.
*/
- mzap_create_impl(mos, object, 0, 0, tx);
+ mzap_create_impl(dn, 0, 0, tx);
dn->dn_next_type[tx->tx_txg & TXG_MASK] = dn->dn_type =
DMU_OTN_ZAP_METADATA;
dnode_setdirty(dn, tx);
dnode_rele(dn, FTAG);
-
spa_feature_incr(dmu_objset_spa(mos),
SPA_FEATURE_EXTENSIBLE_DATASET, tx);
}
@@ -449,6 +484,7 @@ dmu_object_free_zapified(objset_t *mos, uint64_t object, dmu_tx_t *tx)
EXPORT_SYMBOL(dmu_object_alloc);
EXPORT_SYMBOL(dmu_object_alloc_ibs);
EXPORT_SYMBOL(dmu_object_alloc_dnsize);
+EXPORT_SYMBOL(dmu_object_alloc_hold);
EXPORT_SYMBOL(dmu_object_claim);
EXPORT_SYMBOL(dmu_object_claim_dnsize);
EXPORT_SYMBOL(dmu_object_reclaim);
diff --git a/module/zfs/dmu_recv.c b/module/zfs/dmu_recv.c
index 990f79025..a448bc148 100644
--- a/module/zfs/dmu_recv.c
+++ b/module/zfs/dmu_recv.c
@@ -1323,13 +1323,15 @@ receive_object(struct receive_writer_arg *rwa, struct drr_object *drro,
if (data != NULL) {
dmu_buf_t *db;
+ dnode_t *dn;
uint32_t flags = DMU_READ_NO_PREFETCH;
if (rwa->raw)
flags |= DMU_READ_NO_DECRYPT;
- VERIFY0(dmu_bonus_hold_impl(rwa->os, drro->drr_object,
- FTAG, flags, &db));
+ VERIFY0(dnode_hold(rwa->os, drro->drr_object, FTAG, &dn));
+ VERIFY0(dmu_bonus_hold_by_dnode(dn, FTAG, &db, flags));
+
dmu_buf_will_dirty(db, tx);
ASSERT3U(db->db_size, >=, drro->drr_bonuslen);
@@ -1346,6 +1348,7 @@ receive_object(struct receive_writer_arg *rwa, struct drr_object *drro,
DRR_OBJECT_PAYLOAD_SIZE(drro));
}
dmu_buf_rele(db, FTAG);
+ dnode_rele(dn, FTAG);
}
dmu_tx_commit(tx);
diff --git a/module/zfs/zap_micro.c b/module/zfs/zap_micro.c
index 8b4fd0652..fa369f797 100644
--- a/module/zfs/zap_micro.c
+++ b/module/zfs/zap_micro.c
@@ -699,17 +699,17 @@ mzap_upgrade(zap_t **zapp, void *tag, dmu_tx_t *tx, zap_flags_t flags)
* of them may be supplied.
*/
void
-mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags,
- dmu_tx_t *tx)
+mzap_create_impl(dnode_t *dn, int normflags, zap_flags_t flags, dmu_tx_t *tx)
{
dmu_buf_t *db;
- VERIFY0(dmu_buf_hold(os, obj, 0, FTAG, &db, DMU_READ_NO_PREFETCH));
+ VERIFY0(dmu_buf_hold_by_dnode(dn, 0, FTAG, &db, DMU_READ_NO_PREFETCH));
dmu_buf_will_dirty(db, tx);
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_salt =
+ ((uintptr_t)db ^ (uintptr_t)tx ^ (dn->dn_object << 1)) | 1ULL;
zp->mz_normflags = normflags;
if (flags != 0) {
@@ -724,6 +724,33 @@ mzap_create_impl(objset_t *os, uint64_t obj, int normflags, zap_flags_t flags,
}
}
+static uint64_t
+zap_create_impl(objset_t *os, int normflags, zap_flags_t flags,
+ dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift,
+ dmu_object_type_t bonustype, int bonuslen, int dnodesize,
+ dnode_t **allocated_dnode, void *tag, dmu_tx_t *tx)
+{
+ uint64_t obj;
+
+ ASSERT3U(DMU_OT_BYTESWAP(ot), ==, DMU_BSWAP_ZAP);
+
+ if (allocated_dnode == NULL) {
+ dnode_t *dn;
+ obj = dmu_object_alloc_hold(os, ot, 1ULL << leaf_blockshift,
+ indirect_blockshift, bonustype, bonuslen, dnodesize,
+ &dn, FTAG, tx);
+ mzap_create_impl(dn, normflags, flags, tx);
+ dnode_rele(dn, FTAG);
+ } else {
+ obj = dmu_object_alloc_hold(os, ot, 1ULL << leaf_blockshift,
+ indirect_blockshift, bonustype, bonuslen, dnodesize,
+ allocated_dnode, tag, tx);
+ mzap_create_impl(*allocated_dnode, normflags, flags, tx);
+ }
+
+ return (obj);
+}
+
int
zap_create_claim(objset_t *os, uint64_t obj, dmu_object_type_t ot,
dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx)
@@ -754,12 +781,23 @@ 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)
{
+ dnode_t *dn;
+ int error;
+
ASSERT3U(DMU_OT_BYTESWAP(ot), ==, DMU_BSWAP_ZAP);
- int err = dmu_object_claim_dnsize(os, obj, ot, 0, bonustype, bonuslen,
+ error = dmu_object_claim_dnsize(os, obj, ot, 0, bonustype, bonuslen,
dnodesize, tx);
- if (err != 0)
- return (err);
- mzap_create_impl(os, obj, normflags, 0, tx);
+ if (error != 0)
+ return (error);
+
+ error = dnode_hold(os, obj, FTAG, &dn);
+ if (error != 0)
+ return (error);
+
+ mzap_create_impl(dn, normflags, 0, tx);
+
+ dnode_rele(dn, FTAG);
+
return (0);
}
@@ -790,12 +828,8 @@ uint64_t
zap_create_norm_dnsize(objset_t *os, int normflags, dmu_object_type_t ot,
dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx)
{
- ASSERT3U(DMU_OT_BYTESWAP(ot), ==, DMU_BSWAP_ZAP);
- uint64_t obj = dmu_object_alloc_dnsize(os, ot, 0, bonustype, bonuslen,
- dnodesize, tx);
-
- mzap_create_impl(os, obj, normflags, 0, tx);
- return (obj);
+ return (zap_create_impl(os, normflags, 0, ot, 0, 0,
+ bonustype, bonuslen, dnodesize, NULL, NULL, tx));
}
uint64_t
@@ -812,20 +846,25 @@ zap_create_flags_dnsize(objset_t *os, int normflags, zap_flags_t flags,
dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift,
dmu_object_type_t bonustype, int bonuslen, int dnodesize, dmu_tx_t *tx)
{
- ASSERT3U(DMU_OT_BYTESWAP(ot), ==, DMU_BSWAP_ZAP);
- uint64_t obj = dmu_object_alloc_dnsize(os, ot, 0, bonustype, bonuslen,
- dnodesize, tx);
-
- ASSERT(leaf_blockshift >= SPA_MINBLOCKSHIFT &&
- leaf_blockshift <= SPA_OLD_MAXBLOCKSHIFT &&
- indirect_blockshift >= SPA_MINBLOCKSHIFT &&
- indirect_blockshift <= SPA_OLD_MAXBLOCKSHIFT);
-
- VERIFY(dmu_object_set_blocksize(os, obj,
- 1ULL << leaf_blockshift, indirect_blockshift, tx) == 0);
+ return (zap_create_impl(os, normflags, flags, ot, leaf_blockshift,
+ indirect_blockshift, bonustype, bonuslen, dnodesize, NULL, NULL,
+ tx));
+}
- mzap_create_impl(os, obj, normflags, flags, tx);
- return (obj);
+/*
+ * Create a zap object and return a pointer to the newly allocated dnode via
+ * the allocated_dnode argument. The returned dnode will be held and the
+ * caller is responsible for releasing the hold by calling dnode_rele().
+ */
+uint64_t
+zap_create_hold(objset_t *os, int normflags, zap_flags_t flags,
+ dmu_object_type_t ot, int leaf_blockshift, int indirect_blockshift,
+ dmu_object_type_t bonustype, int bonuslen, int dnodesize,
+ dnode_t **allocated_dnode, void *tag, dmu_tx_t *tx)
+{
+ return (zap_create_impl(os, normflags, flags, ot, leaf_blockshift,
+ indirect_blockshift, bonustype, bonuslen, dnodesize,
+ allocated_dnode, tag, tx));
}
int
@@ -1596,6 +1635,7 @@ EXPORT_SYMBOL(zap_create_flags_dnsize);
EXPORT_SYMBOL(zap_create_claim);
EXPORT_SYMBOL(zap_create_claim_norm);
EXPORT_SYMBOL(zap_create_claim_norm_dnsize);
+EXPORT_SYMBOL(zap_create_hold);
EXPORT_SYMBOL(zap_destroy);
EXPORT_SYMBOL(zap_lookup);
EXPORT_SYMBOL(zap_lookup_by_dnode);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-17 10:47:37 +0000