Author: avg
Date: Mon May 16 11:48:43 2016
New Revision: 299938
URL: https://svnweb.freebsd.org/changeset/base/299938
Log:
fix up r299902: mount_snapshot requires that the covered vnode is locked
Previously that was not strictly enforced.
MFC after: 4 weeks
X-MFC with: r299902
Modified:
head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c
Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c Mon May
16 10:51:35 2016 (r299937)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c Mon May
16 11:48:43 2016 (r299938)
@@ -1086,6 +1086,7 @@ domount:
(void) snprintf(mountpoint, mountpoint_len,
"%s/" ZFS_CTLDIR_NAME "/snapshot/%s",
dvp->v_vfsp->mnt_stat.f_mntonname, nm);
+ VERIFY0(vn_lock(*vpp, LK_EXCLUSIVE));
err = mount_snapshot(curthread, vpp, "zfs", mountpoint, snapname, 0);
kmem_free(mountpoint, mountpoint_len);
if (err == 0) {
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