Author: mm Date: Sat Nov 13 21:09:18 2010 New Revision: 215260 URL: http://svn.freebsd.org/changeset/base/215260
Log: Disable VFS_HOLD placed on mnt_vnodecovered during the mount of a snapshot and VFS_RELE on a non-existing hold on snapshot parent's z_vfs. This disables the changes from OpenSolaris onnv-revision 9234:bffdc4fc05c4 (bug IDs: 6792139, 6794830) - not applicable to FreeBSD. This fixes the process hang if umounting a manually mounted snapshot. Reported by: Alexander Zagrebin <[email protected]> Approved by: delphij (mentor) MFC after: 1 week Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c Sat Nov 13 21:03:19 2010 (r215259) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c Sat Nov 13 21:09:18 2010 (r215260) @@ -1218,12 +1218,14 @@ zfs_mount(vfs_t *vfsp) error = zfs_domount(vfsp, osname); PICKUP_GIANT(); +#ifdef sun /* * Add an extra VFS_HOLD on our parent vfs so that it can't * disappear due to a forced unmount. */ if (error == 0 && ((zfsvfs_t *)vfsp->vfs_data)->z_issnap) VFS_HOLD(mvp->v_vfsp); +#endif /* sun */ out: return (error); @@ -1766,12 +1768,14 @@ zfs_freevfs(vfs_t *vfsp) { zfsvfs_t *zfsvfs = vfsp->vfs_data; +#ifdef sun /* * If this is a snapshot, we have an extra VFS_HOLD on our parent * from zfs_mount(). Release it here. */ if (zfsvfs->z_issnap) VFS_RELE(zfsvfs->z_parent->z_vfs); +#endif /* sun */ zfsvfs_free(zfsvfs); _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "[email protected]"
