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Rebase master to b117

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This commit is contained in:
Brian Behlendorf
2009-07-02 15:44:48 -07:00
parent d164b20935
commit 9babb37438
103 changed files with 7629 additions and 4093 deletions
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module/zfs/dmu.c
+69 -13
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@@ -19,7 +19,7 @@
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
@@ -85,6 +85,8 @@ const dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES] = {
{ byteswap_uint64_array, TRUE, "FUID table size" },
{ zap_byteswap, TRUE, "DSL dataset next clones"},
{ zap_byteswap, TRUE, "scrub work queue" },
{ zap_byteswap, TRUE, "ZFS user/group used" },
{ zap_byteswap, TRUE, "ZFS user/group quota" },
};
int
@@ -180,22 +182,22 @@ dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **dbp)
* whose dnodes are in the same block.
*/
static int
dmu_buf_hold_array_by_dnode(dnode_t *dn, uint64_t offset,
uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp)
dmu_buf_hold_array_by_dnode(dnode_t *dn, uint64_t offset, uint64_t length,
int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp, uint32_t flags)
{
dsl_pool_t *dp = NULL;
dmu_buf_t **dbp;
uint64_t blkid, nblks, i;
uint32_t flags;
uint32_t dbuf_flags;
int err;
zio_t *zio;
hrtime_t start;
ASSERT(length <= DMU_MAX_ACCESS);
flags = DB_RF_CANFAIL | DB_RF_NEVERWAIT;
if (length > zfetch_array_rd_sz)
flags |= DB_RF_NOPREFETCH;
dbuf_flags = DB_RF_CANFAIL | DB_RF_NEVERWAIT;
if (flags & DMU_READ_NO_PREFETCH || length > zfetch_array_rd_sz)
dbuf_flags |= DB_RF_NOPREFETCH;
rw_enter(&dn->dn_struct_rwlock, RW_READER);
if (dn->dn_datablkshift) {
@@ -233,7 +235,7 @@ dmu_buf_hold_array_by_dnode(dnode_t *dn, uint64_t offset,
/* initiate async i/o */
if (read) {
rw_exit(&dn->dn_struct_rwlock);
(void) dbuf_read(db, zio, flags);
(void) dbuf_read(db, zio, dbuf_flags);
rw_enter(&dn->dn_struct_rwlock, RW_READER);
}
dbp[i] = &db->db;
@@ -285,7 +287,7 @@ dmu_buf_hold_array(objset_t *os, uint64_t object, uint64_t offset,
return (err);
err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag,
numbufsp, dbpp);
numbufsp, dbpp, DMU_READ_PREFETCH);
dnode_rele(dn, FTAG);
@@ -300,7 +302,7 @@ dmu_buf_hold_array_by_bonus(dmu_buf_t *db, uint64_t offset,
int err;
err = dmu_buf_hold_array_by_dnode(dn, offset, length, read, tag,
numbufsp, dbpp);
numbufsp, dbpp, DMU_READ_PREFETCH);
return (err);
}
@@ -442,7 +444,8 @@ dmu_free_long_range_impl(objset_t *os, dnode_t *dn, uint64_t offset,
object_size = align == 1 ? dn->dn_datablksz :
(dn->dn_maxblkid + 1) << dn->dn_datablkshift;
if (trunc || (end = offset + length) > object_size)
end = offset + length;
if (trunc || end > object_size)
end = object_size;
if (end <= offset)
return (0);
@@ -450,6 +453,7 @@ dmu_free_long_range_impl(objset_t *os, dnode_t *dn, uint64_t offset,
while (length) {
start = end;
/* assert(offset <= start) */
err = get_next_chunk(dn, &start, offset);
if (err)
return (err);
@@ -540,7 +544,7 @@ dmu_free_range(objset_t *os, uint64_t object, uint64_t offset,
int
dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
void *buf)
void *buf, uint32_t flags)
{
dnode_t *dn;
dmu_buf_t **dbp;
@@ -570,7 +574,7 @@ dmu_read(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
* to be reading in parallel.
*/
err = dmu_buf_hold_array_by_dnode(dn, offset, mylen,
TRUE, FTAG, &numbufs, &dbp);
TRUE, FTAG, &numbufs, &dbp, flags);
if (err)
break;
@@ -810,6 +814,58 @@ dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
}
#endif
/*
* Allocate a loaned anonymous arc buffer.
*/
arc_buf_t *
dmu_request_arcbuf(dmu_buf_t *handle, int size)
{
dnode_t *dn = ((dmu_buf_impl_t *)handle)->db_dnode;
return (arc_loan_buf(dn->dn_objset->os_spa, size));
}
/*
* Free a loaned arc buffer.
*/
void
dmu_return_arcbuf(arc_buf_t *buf)
{
arc_return_buf(buf, FTAG);
VERIFY(arc_buf_remove_ref(buf, FTAG) == 1);
}
/*
* When possible directly assign passed loaned arc buffer to a dbuf.
* If this is not possible copy the contents of passed arc buf via
* dmu_write().
*/
void
dmu_assign_arcbuf(dmu_buf_t *handle, uint64_t offset, arc_buf_t *buf,
dmu_tx_t *tx)
{
dnode_t *dn = ((dmu_buf_impl_t *)handle)->db_dnode;
dmu_buf_impl_t *db;
uint32_t blksz = (uint32_t)arc_buf_size(buf);
uint64_t blkid;
rw_enter(&dn->dn_struct_rwlock, RW_READER);
blkid = dbuf_whichblock(dn, offset);
VERIFY((db = dbuf_hold(dn, blkid, FTAG)) != NULL);
rw_exit(&dn->dn_struct_rwlock);
if (offset == db->db.db_offset && blksz == db->db.db_size) {
dbuf_assign_arcbuf(db, buf, tx);
dbuf_rele(db, FTAG);
} else {
dbuf_rele(db, FTAG);
ASSERT(dn->dn_objset->os.os == dn->dn_objset);
dmu_write(&dn->dn_objset->os, dn->dn_object, offset, blksz,
buf->b_data, tx);
dmu_return_arcbuf(buf);
}
}
typedef struct {
dbuf_dirty_record_t *dr;
dmu_sync_cb_t *done;