diff options
| author | J. Bruce Fields <bfields@redhat.com> | 2012-10-09 18:35:22 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2012-10-09 18:35:22 -0400 |
| commit | f474af7051212b4efc8267583fad9c4ebf33ccff (patch) | |
| tree | 1aa46ebc8065a341f247c2a2d9af2f624ad1d4f8 /fs/namespace.c | |
| parent | 0d22f68f02c10d5d10ec5712917e5828b001a822 (diff) | |
| parent | e3dd9a52cb5552c46c2a4ca7ccdfb4dab5c72457 (diff) | |
nfs: disintegrate UAPI for nfs
This is to complete part of the Userspace API (UAPI) disintegration for which
the preparatory patches were pulled recently. After these patches, userspace
headers will be segregated into:
include/uapi/linux/.../foo.h
for the userspace interface stuff, and:
include/linux/.../foo.h
for the strictly kernel internal stuff.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/namespace.c')
| -rw-r--r-- | fs/namespace.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 4d31f73e256..7bdf7907413 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1886,8 +1886,14 @@ static int do_add_mount(struct mount *newmnt, struct path *path, int mnt_flags) return err; err = -EINVAL; - if (!(mnt_flags & MNT_SHRINKABLE) && !check_mnt(real_mount(path->mnt))) - goto unlock; + if (unlikely(!check_mnt(real_mount(path->mnt)))) { + /* that's acceptable only for automounts done in private ns */ + if (!(mnt_flags & MNT_SHRINKABLE)) + goto unlock; + /* ... and for those we'd better have mountpoint still alive */ + if (!real_mount(path->mnt)->mnt_ns) + goto unlock; + } /* Refuse the same filesystem on the same mount point */ err = -EBUSY; |