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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_tx.c
+136 -43
View File
@@ -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.
*/
@@ -160,6 +160,41 @@ dmu_tx_check_ioerr(zio_t *zio, dnode_t *dn, int level, uint64_t blkid)
return (err);
}
static void
dmu_tx_count_indirects(dmu_tx_hold_t *txh, dmu_buf_impl_t *db,
boolean_t freeable, dmu_buf_impl_t **history)
{
int i = db->db_level + 1;
dnode_t *dn = db->db_dnode;
if (i >= dn->dn_nlevels)
return;
db = db->db_parent;
if (db == NULL) {
uint64_t lvls = dn->dn_nlevels - i;
txh->txh_space_towrite += lvls << dn->dn_indblkshift;
return;
}
if (db != history[i]) {
dsl_dataset_t *ds = dn->dn_objset->os_dsl_dataset;
uint64_t space = 1ULL << dn->dn_indblkshift;
freeable = (db->db_blkptr && (freeable ||
dsl_dataset_block_freeable(ds, db->db_blkptr->blk_birth)));
if (freeable)
txh->txh_space_tooverwrite += space;
else
txh->txh_space_towrite += space;
if (db->db_blkptr)
txh->txh_space_tounref += space;
history[i] = db;
dmu_tx_count_indirects(txh, db, freeable, history);
}
}
/* ARGSUSED */
static void
dmu_tx_count_write(dmu_tx_hold_t *txh, uint64_t off, uint64_t len)
@@ -177,18 +212,24 @@ dmu_tx_count_write(dmu_tx_hold_t *txh, uint64_t off, uint64_t len)
min_ibs = DN_MIN_INDBLKSHIFT;
max_ibs = DN_MAX_INDBLKSHIFT;
/*
* For i/o error checking, read the first and last level-0
* blocks (if they are not aligned), and all the level-1 blocks.
*/
if (dn) {
dmu_buf_impl_t *last[DN_MAX_LEVELS];
int nlvls = dn->dn_nlevels;
int delta;
/*
* For i/o error checking, read the first and last level-0
* blocks (if they are not aligned), and all the level-1 blocks.
*/
if (dn->dn_maxblkid == 0) {
if ((off > 0 || len < dn->dn_datablksz) &&
off < dn->dn_datablksz) {
delta = dn->dn_datablksz;
start = (off < dn->dn_datablksz) ? 0 : 1;
end = (off+len <= dn->dn_datablksz) ? 0 : 1;
if (start == 0 && (off > 0 || len < dn->dn_datablksz)) {
err = dmu_tx_check_ioerr(NULL, dn, 0, 0);
if (err)
goto out;
delta -= off;
}
} else {
zio_t *zio = zio_root(dn->dn_objset->os_spa,
@@ -213,10 +254,9 @@ dmu_tx_count_write(dmu_tx_hold_t *txh, uint64_t off, uint64_t len)
}
/* level-1 blocks */
if (dn->dn_nlevels > 1) {
start >>= dn->dn_indblkshift - SPA_BLKPTRSHIFT;
end >>= dn->dn_indblkshift - SPA_BLKPTRSHIFT;
for (i = start+1; i < end; i++) {
if (nlvls > 1) {
int shft = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
for (i = (start>>shft)+1; i < end>>shft; i++) {
err = dmu_tx_check_ioerr(zio, dn, 1, i);
if (err)
goto out;
@@ -226,20 +266,70 @@ dmu_tx_count_write(dmu_tx_hold_t *txh, uint64_t off, uint64_t len)
err = zio_wait(zio);
if (err)
goto out;
delta = P2NPHASE(off, dn->dn_datablksz);
}
}
/*
* If there's more than one block, the blocksize can't change,
* so we can make a more precise estimate. Alternatively,
* if the dnode's ibs is larger than max_ibs, always use that.
* This ensures that if we reduce DN_MAX_INDBLKSHIFT,
* the code will still work correctly on existing pools.
*/
if (dn && (dn->dn_maxblkid != 0 || dn->dn_indblkshift > max_ibs)) {
min_ibs = max_ibs = dn->dn_indblkshift;
if (dn->dn_datablkshift != 0)
if (dn->dn_maxblkid > 0) {
/*
* The blocksize can't change,
* so we can make a more precise estimate.
*/
ASSERT(dn->dn_datablkshift != 0);
min_bs = max_bs = dn->dn_datablkshift;
min_ibs = max_ibs = dn->dn_indblkshift;
} else if (dn->dn_indblkshift > max_ibs) {
/*
* This ensures that if we reduce DN_MAX_INDBLKSHIFT,
* the code will still work correctly on older pools.
*/
min_ibs = max_ibs = dn->dn_indblkshift;
}
/*
* If this write is not off the end of the file
* we need to account for overwrites/unref.
*/
if (start <= dn->dn_maxblkid)
bzero(last, sizeof (dmu_buf_impl_t *) * DN_MAX_LEVELS);
while (start <= dn->dn_maxblkid) {
spa_t *spa = txh->txh_tx->tx_pool->dp_spa;
dsl_dataset_t *ds = dn->dn_objset->os_dsl_dataset;
dmu_buf_impl_t *db;
rw_enter(&dn->dn_struct_rwlock, RW_READER);
db = dbuf_hold_level(dn, 0, start, FTAG);
rw_exit(&dn->dn_struct_rwlock);
if (db->db_blkptr && dsl_dataset_block_freeable(ds,
db->db_blkptr->blk_birth)) {
dprintf_bp(db->db_blkptr, "can free old%s", "");
txh->txh_space_tooverwrite += dn->dn_datablksz;
txh->txh_space_tounref += dn->dn_datablksz;
dmu_tx_count_indirects(txh, db, TRUE, last);
} else {
txh->txh_space_towrite += dn->dn_datablksz;
if (db->db_blkptr)
txh->txh_space_tounref +=
bp_get_dasize(spa, db->db_blkptr);
dmu_tx_count_indirects(txh, db, FALSE, last);
}
dbuf_rele(db, FTAG);
if (++start > end) {
/*
* Account for new indirects appearing
* before this IO gets assigned into a txg.
*/
bits = 64 - min_bs;
epbs = min_ibs - SPA_BLKPTRSHIFT;
for (bits -= epbs * (nlvls - 1);
bits >= 0; bits -= epbs)
txh->txh_fudge += 1ULL << max_ibs;
goto out;
}
off += delta;
if (len >= delta)
len -= delta;
delta = dn->dn_datablksz;
}
}
/*
@@ -262,20 +352,22 @@ dmu_tx_count_write(dmu_tx_hold_t *txh, uint64_t off, uint64_t len)
for (bits = 64 - min_bs; bits >= 0; bits -= epbs) {
start >>= epbs;
end >>= epbs;
/*
* If we increase the number of levels of indirection,
* we'll need new blkid=0 indirect blocks. If start == 0,
* we're already accounting for that blocks; and if end == 0,
* we can't increase the number of levels beyond that.
*/
if (start != 0 && end != 0)
txh->txh_space_towrite += 1ULL << max_ibs;
ASSERT3U(end, >=, start);
txh->txh_space_towrite += (end - start + 1) << max_ibs;
if (start != 0) {
/*
* We also need a new blkid=0 indirect block
* to reference any existing file data.
*/
txh->txh_space_towrite += 1ULL << max_ibs;
}
}
ASSERT(txh->txh_space_towrite < 2 * DMU_MAX_ACCESS);
out:
if (txh->txh_space_towrite + txh->txh_space_tooverwrite >
2 * DMU_MAX_ACCESS)
err = EFBIG;
if (err)
txh->txh_tx->tx_err = err;
}
@@ -292,6 +384,7 @@ dmu_tx_count_dnode(dmu_tx_hold_t *txh)
dsl_dataset_block_freeable(dn->dn_objset->os_dsl_dataset,
dn->dn_dbuf->db_blkptr->blk_birth)) {
txh->txh_space_tooverwrite += space;
txh->txh_space_tounref += space;
} else {
txh->txh_space_towrite += space;
if (dn && dn->dn_dbuf->db_blkptr)
@@ -535,7 +628,7 @@ dmu_tx_hold_free(dmu_tx_t *tx, uint64_t object, uint64_t off, uint64_t len)
}
void
dmu_tx_hold_zap(dmu_tx_t *tx, uint64_t object, int add, char *name)
dmu_tx_hold_zap(dmu_tx_t *tx, uint64_t object, int add, const char *name)
{
dmu_tx_hold_t *txh;
dnode_t *dn;
@@ -584,9 +677,9 @@ dmu_tx_hold_zap(dmu_tx_t *tx, uint64_t object, int add, char *name)
txh->txh_space_tooverwrite += SPA_MAXBLOCKSIZE;
} else {
txh->txh_space_towrite += SPA_MAXBLOCKSIZE;
txh->txh_space_tounref +=
BP_GET_ASIZE(dn->dn_phys->dn_blkptr);
}
if (dn->dn_phys->dn_blkptr[0].blk_birth)
txh->txh_space_tounref += SPA_MAXBLOCKSIZE;
return;
}
@@ -603,12 +696,9 @@ dmu_tx_hold_zap(dmu_tx_t *tx, uint64_t object, int add, char *name)
}
}
/*
* 3 blocks overwritten: target leaf, ptrtbl block, header block
* 3 new blocks written if adding: new split leaf, 2 grown ptrtbl blocks
*/
dmu_tx_count_write(txh, dn->dn_maxblkid * dn->dn_datablksz,
(3 + (add ? 3 : 0)) << dn->dn_datablkshift);
err = zap_count_write(&dn->dn_objset->os, dn->dn_object, name, add,
&txh->txh_space_towrite, &txh->txh_space_tooverwrite,
txh->txh_dnode->dn_datablkshift);
/*
* If the modified blocks are scattered to the four winds,
@@ -616,7 +706,10 @@ dmu_tx_hold_zap(dmu_tx_t *tx, uint64_t object, int add, char *name)
*/
epbs = dn->dn_indblkshift - SPA_BLKPTRSHIFT;
for (nblocks = dn->dn_maxblkid >> epbs; nblocks != 0; nblocks >>= epbs)
txh->txh_space_towrite += 3 << dn->dn_indblkshift;
if (dn->dn_objset->os_dsl_dataset->ds_phys->ds_prev_snap_obj)
txh->txh_space_towrite += 3 << dn->dn_indblkshift;
else
txh->txh_space_tooverwrite += 3 << dn->dn_indblkshift;
}
void