Author: avg
Date: Mon May 29 06:30:34 2017
New Revision: 319096
URL: https://svnweb.freebsd.org/changeset/base/319096
Log:
zfs_lookup: fix bogus arguments to lookup of "snapshot" directory
When a parent directory lookup is done at the root of a snapshot mounted
under .zfs/snapshot directory, we need to look up that directory in
the parent filesystem. We achieve that by doing a VOP_LOOKUP operation
on a .zfs vnode with "snapshot" as a target name. But previously we
also passed ISDOTDOT flag to the lookup and, because of that, the lookup
actually returned the parent of the .zfs vnode, that is, a root vnode of
the parent filesystem.
Reported by: lev
Tested by: lev
MFC after: 3 days
Modified:
head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c Mon May
29 06:26:00 2017 (r319095)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c Mon May
29 06:30:34 2017 (r319096)
@@ -1635,7 +1635,7 @@ zfs_lookup(vnode_t *dvp, char *nm, vnode
cn.cn_nameptr = "snapshot";
cn.cn_namelen = strlen(cn.cn_nameptr);
cn.cn_nameiop = cnp->cn_nameiop;
- cn.cn_flags = cnp->cn_flags;
+ cn.cn_flags = cnp->cn_flags & ~ISDOTDOT;
cn.cn_lkflags = cnp->cn_lkflags;
error = VOP_LOOKUP(zfsctl_vp, vpp, &cn);
vput(zfsctl_vp);
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