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FreeBSD: Fix a pair of bugs in zfs_fhtovp() 

- Add a zfs_exit() call in an error path, otherwise a lock is leaked.
- Remove the fid_gen > 1 check.  That appears to be Linux-specific:
  zfsctl_snapdir_fid() sets fid_gen to 0 or 1 depending on whether the
  snapshot directory is mounted.  On FreeBSD it fails, making snapshot
  dirs inaccessible via NFS.

Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Andriy Gapon <avg@FreeBSD.org>
Signed-off-by: Mark Johnston <markj@FreeBSD.org>
Fixes: 43dbf88178 ("FreeBSD: vfsops: use setgen for error case")
Closes #14001
Closes #13974
(cherry picked from commit ed566bf1cd)
This commit is contained in:
Mark Johnston 2022-10-11 15:29:55 -04:00 committed by Brian Behlendorf
parent fc1c0053f9
commit 4e3fecbdfd
1 changed files with 2 additions and 1 deletions
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3
module/os/freebsd/zfs/zfs_vfsops.c
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@ -1845,7 +1845,8 @@ zfs_fhtovp(vfs_t *vfsp, fid_t *fidp, int flags, vnode_t **vpp)
return (SET_ERROR(EINVAL));
}
if (fidp->fid_len == LONG_FID_LEN && (fid_gen > 1 || setgen != 0)) {
if (fidp->fid_len == LONG_FID_LEN && setgen != 0) {
ZFS_EXIT(zfsvfs);
dprintf("snapdir fid: fid_gen (%llu) and setgen (%llu)\n",
(u_longlong_t)fid_gen, (u_longlong_t)setgen);
return (SET_ERROR(EINVAL));