diff options
Diffstat (limited to 'module/zfs/dmu_object.c')
| -rw-r--r-- | module/zfs/dmu_object.c | 44 |
1 files changed, 38 insertions, 6 deletions
diff --git a/module/zfs/dmu_object.c b/module/zfs/dmu_object.c index 1b9247d66..1f91fc1ad 100644 --- a/module/zfs/dmu_object.c +++ b/module/zfs/dmu_object.c @@ -19,12 +19,10 @@ * 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. */ -#pragma ident "%Z%%M% %I% %E% SMI" - #include <sys/dmu.h> #include <sys/dmu_objset.h> #include <sys/dmu_tx.h> @@ -108,22 +106,56 @@ dmu_object_claim(objset_t *os, uint64_t object, dmu_object_type_t ot, int dmu_object_reclaim(objset_t *os, uint64_t object, dmu_object_type_t ot, - int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) + int blocksize, dmu_object_type_t bonustype, int bonuslen) { dnode_t *dn; + dmu_tx_t *tx; + int nblkptr; int err; - if (object == DMU_META_DNODE_OBJECT && !dmu_tx_private_ok(tx)) + if (object == DMU_META_DNODE_OBJECT) return (EBADF); err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_ALLOCATED, FTAG, &dn); if (err) return (err); + + if (dn->dn_type == ot && dn->dn_datablksz == blocksize && + dn->dn_bonustype == bonustype && dn->dn_bonuslen == bonuslen) { + /* nothing is changing, this is a noop */ + dnode_rele(dn, FTAG); + return (0); + } + + nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT); + + /* + * If we are losing blkptrs or changing the block size this must + * be a new file instance. We must clear out the previous file + * contents before we can change this type of metadata in the dnode. + */ + if (dn->dn_nblkptr > nblkptr || dn->dn_datablksz != blocksize) { + err = dmu_free_long_range(os, object, 0, DMU_OBJECT_END); + if (err) + goto out; + } + + tx = dmu_tx_create(os); + dmu_tx_hold_bonus(tx, object); + err = dmu_tx_assign(tx, TXG_WAIT); + if (err) { + dmu_tx_abort(tx); + goto out; + } + dnode_reallocate(dn, ot, blocksize, bonustype, bonuslen, tx); + + dmu_tx_commit(tx); +out: dnode_rele(dn, FTAG); - return (0); + return (err); } int |