diff options
author | pjd <pjd@FreeBSD.org> | 2009-08-31 16:27:00 +0000 |
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committer | pjd <pjd@FreeBSD.org> | 2009-08-31 16:27:00 +0000 |
commit | 326fe56013fb3059cc8c2cb5cd7e405a33d8619d (patch) | |
tree | e7eab2d8395d4bcc5edb4f4134e230031d225b46 /sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c | |
parent | ae8546fec46ffd6e31c2eff84e417e68dcbbf32b (diff) | |
download | FreeBSD-src-326fe56013fb3059cc8c2cb5cd7e405a33d8619d.zip FreeBSD-src-326fe56013fb3059cc8c2cb5cd7e405a33d8619d.tar.gz |
Backport the 'dirtying dbuf' panic fix from newer ZFS version.
Reported by: Thomas Backman <serenity@exscape.org>
MFC after: 1 week
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c')
-rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c | 36 |
1 files changed, 26 insertions, 10 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c index a46d4e7..1b729e3 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.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/zfs_context.h> #include <sys/dbuf.h> #include <sys/dnode.h> @@ -534,18 +532,12 @@ dnode_sync(dnode_t *dn, dmu_tx_t *tx) /* XXX shouldn't the phys already be zeroed? */ bzero(dnp, DNODE_CORE_SIZE); dnp->dn_nlevels = 1; + dnp->dn_nblkptr = dn->dn_nblkptr; } - if (dn->dn_nblkptr > dnp->dn_nblkptr) { - /* zero the new blkptrs we are gaining */ - bzero(dnp->dn_blkptr + dnp->dn_nblkptr, - sizeof (blkptr_t) * - (dn->dn_nblkptr - dnp->dn_nblkptr)); - } dnp->dn_type = dn->dn_type; dnp->dn_bonustype = dn->dn_bonustype; dnp->dn_bonuslen = dn->dn_bonuslen; - dnp->dn_nblkptr = dn->dn_nblkptr; } ASSERT(dnp->dn_nlevels > 1 || @@ -605,6 +597,30 @@ dnode_sync(dnode_t *dn, dmu_tx_t *tx) return; } + if (dn->dn_next_nblkptr[txgoff]) { + /* this should only happen on a realloc */ + ASSERT(dn->dn_allocated_txg == tx->tx_txg); + if (dn->dn_next_nblkptr[txgoff] > dnp->dn_nblkptr) { + /* zero the new blkptrs we are gaining */ + bzero(dnp->dn_blkptr + dnp->dn_nblkptr, + sizeof (blkptr_t) * + (dn->dn_next_nblkptr[txgoff] - dnp->dn_nblkptr)); +#ifdef ZFS_DEBUG + } else { + int i; + ASSERT(dn->dn_next_nblkptr[txgoff] < dnp->dn_nblkptr); + /* the blkptrs we are losing better be unallocated */ + for (i = dn->dn_next_nblkptr[txgoff]; + i < dnp->dn_nblkptr; i++) + ASSERT(BP_IS_HOLE(&dnp->dn_blkptr[i])); +#endif + } + mutex_enter(&dn->dn_mtx); + dnp->dn_nblkptr = dn->dn_next_nblkptr[txgoff]; + dn->dn_next_nblkptr[txgoff] = 0; + mutex_exit(&dn->dn_mtx); + } + if (dn->dn_next_nlevels[txgoff]) { dnode_increase_indirection(dn, tx); dn->dn_next_nlevels[txgoff] = 0; |