Author: pjd Date: Mon Aug 31 16:27:00 2009 New Revision: 196703 URL: http://svn.freebsd.org/changeset/base/196703
Log: Backport the 'dirtying dbuf' panic fix from newer ZFS version. Reported by: Thomas Backman <[email protected]> MFC after: 1 week Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dnode.h Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c Mon Aug 31 16:25:55 2009 (r196702) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c Mon Aug 31 16:27:00 2009 (r196703) @@ -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. */ @@ -864,10 +864,11 @@ restore_object(struct restorearg *ra, ob /* currently allocated, want to be allocated */ dmu_tx_hold_bonus(tx, drro->drr_object); /* - * We may change blocksize, so need to - * hold_write + * We may change blocksize and delete old content, + * so need to hold_write and hold_free. */ dmu_tx_hold_write(tx, drro->drr_object, 0, 1); + dmu_tx_hold_free(tx, drro->drr_object, 0, DMU_OBJECT_END); err = dmu_tx_assign(tx, TXG_WAIT); if (err) { dmu_tx_abort(tx); Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c Mon Aug 31 16:25:55 2009 (r196702) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c Mon Aug 31 16:27:00 2009 (r196703) @@ -415,7 +415,7 @@ void dnode_reallocate(dnode_t *dn, dmu_object_type_t ot, int blocksize, dmu_object_type_t bonustype, int bonuslen, dmu_tx_t *tx) { - int i, old_nblkptr; + int i, nblkptr; dmu_buf_impl_t *db = NULL; ASSERT3U(blocksize, >=, SPA_MINBLOCKSIZE); @@ -445,6 +445,8 @@ dnode_reallocate(dnode_t *dn, dmu_object dnode_free_range(dn, 0, -1ULL, tx); } + nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT); + /* change blocksize */ rw_enter(&dn->dn_struct_rwlock, RW_WRITER); if (blocksize != dn->dn_datablksz && @@ -457,6 +459,8 @@ dnode_reallocate(dnode_t *dn, dmu_object dnode_setdirty(dn, tx); dn->dn_next_bonuslen[tx->tx_txg&TXG_MASK] = bonuslen; dn->dn_next_blksz[tx->tx_txg&TXG_MASK] = blocksize; + if (dn->dn_nblkptr != nblkptr) + dn->dn_next_nblkptr[tx->tx_txg&TXG_MASK] = nblkptr; rw_exit(&dn->dn_struct_rwlock); if (db) dbuf_rele(db, FTAG); @@ -466,19 +470,15 @@ dnode_reallocate(dnode_t *dn, dmu_object /* change bonus size and type */ mutex_enter(&dn->dn_mtx); - old_nblkptr = dn->dn_nblkptr; dn->dn_bonustype = bonustype; dn->dn_bonuslen = bonuslen; - dn->dn_nblkptr = 1 + ((DN_MAX_BONUSLEN - bonuslen) >> SPA_BLKPTRSHIFT); + dn->dn_nblkptr = nblkptr; dn->dn_checksum = ZIO_CHECKSUM_INHERIT; dn->dn_compress = ZIO_COMPRESS_INHERIT; ASSERT3U(dn->dn_nblkptr, <=, DN_MAX_NBLKPTR); - /* XXX - for now, we can't make nblkptr smaller */ - ASSERT3U(dn->dn_nblkptr, >=, old_nblkptr); - - /* fix up the bonus db_size if dn_nblkptr has changed */ - if (dn->dn_bonus && dn->dn_bonuslen != old_nblkptr) { + /* fix up the bonus db_size */ + if (dn->dn_bonus) { dn->dn_bonus->db.db_size = DN_MAX_BONUSLEN - (dn->dn_nblkptr-1) * sizeof (blkptr_t); ASSERT(dn->dn_bonuslen <= dn->dn_bonus->db.db_size); Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c Mon Aug 31 16:25:55 2009 (r196702) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c Mon Aug 31 16:27:00 2009 (r196703) @@ -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; Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dnode.h ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dnode.h Mon Aug 31 16:25:55 2009 (r196702) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dnode.h Mon Aug 31 16:27:00 2009 (r196703) @@ -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 +160,7 @@ typedef struct dnode { uint16_t dn_datablkszsec; /* in 512b sectors */ uint32_t dn_datablksz; /* in bytes */ uint64_t dn_maxblkid; + uint8_t dn_next_nblkptr[TXG_SIZE]; uint8_t dn_next_nlevels[TXG_SIZE]; uint8_t dn_next_indblkshift[TXG_SIZE]; uint16_t dn_next_bonuslen[TXG_SIZE]; _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "[email protected]"
