diff options
author | pjd <pjd@FreeBSD.org> | 2009-09-26 00:10:45 +0000 |
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committer | pjd <pjd@FreeBSD.org> | 2009-09-26 00:10:45 +0000 |
commit | f4593287a1446823bffff8af7c9b347b58747b25 (patch) | |
tree | 6e7492fb03f6728ed0af3c2a37d59806424c6b30 /sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c | |
parent | 6da7f61b4860d1e85f0f9564f88ae8e7b6dbc1b9 (diff) | |
download | FreeBSD-src-f4593287a1446823bffff8af7c9b347b58747b25.zip FreeBSD-src-f4593287a1446823bffff8af7c9b347b58747b25.tar.gz |
Handle cases where virtual (GFS) vnodes are referenced when doing forced
unmount. In that case we cannot depend on the proper order of invalidating
vnodes, so we have to free resources when we have a chance.
PR: kern/139062
Reported by: trasz
MFC after: 3 days
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c')
-rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c | 34 |
1 files changed, 21 insertions, 13 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c index 65b3262..7820293 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c @@ -1007,15 +1007,24 @@ zfsctl_snapdir_inactive(ap) { vnode_t *vp = ap->a_vp; zfsctl_snapdir_t *sdp = vp->v_data; - void *private; - - private = gfs_dir_inactive(vp); - if (private != NULL) { - ASSERT(avl_numnodes(&sdp->sd_snaps) == 0); - mutex_destroy(&sdp->sd_lock); - avl_destroy(&sdp->sd_snaps); - kmem_free(private, sizeof (zfsctl_snapdir_t)); + zfs_snapentry_t *sep; + + /* + * On forced unmount we have to free snapshots from here. + */ + mutex_enter(&sdp->sd_lock); + while ((sep = avl_first(&sdp->sd_snaps)) != NULL) { + avl_remove(&sdp->sd_snaps, sep); + kmem_free(sep->se_name, strlen(sep->se_name) + 1); + kmem_free(sep, sizeof (zfs_snapentry_t)); } + mutex_exit(&sdp->sd_lock); + gfs_dir_inactive(vp); + ASSERT(avl_numnodes(&sdp->sd_snaps) == 0); + mutex_destroy(&sdp->sd_lock); + avl_destroy(&sdp->sd_snaps); + kmem_free(sdp, sizeof (zfsctl_snapdir_t)); + return (0); } @@ -1073,6 +1082,9 @@ zfsctl_snapshot_inactive(ap) int locked; vnode_t *dvp; + if (vp->v_count > 0) + goto end; + VERIFY(gfs_dir_lookup(vp, "..", &dvp, cr, 0, NULL, NULL) == 0); sdp = dvp->v_data; VOP_UNLOCK(dvp, 0); @@ -1080,11 +1092,6 @@ zfsctl_snapshot_inactive(ap) if (!(locked = MUTEX_HELD(&sdp->sd_lock))) mutex_enter(&sdp->sd_lock); - if (vp->v_count > 1) { - if (!locked) - mutex_exit(&sdp->sd_lock); - return (0); - } ASSERT(!vn_ismntpt(vp)); sep = avl_first(&sdp->sd_snaps); @@ -1104,6 +1111,7 @@ zfsctl_snapshot_inactive(ap) if (!locked) mutex_exit(&sdp->sd_lock); VN_RELE(dvp); +end: VFS_RELE(vp->v_vfsp); /* |