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zfs_lookup: fix bogus arguments to lookup of "snapshot" directory

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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
This commit is contained in:
Andriy Gapon 2017-05-29 06:30:34 +00:00
parent 59ed13aa49
commit 1628f75af1
1 changed files with 1 additions and 1 deletions
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2
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
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@ -1635,7 +1635,7 @@ zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct componentname *cnp,
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);