diff options
| author | Benjamin Coddington <bcodding@redhat.com> | 2017-11-10 06:27:49 -0500 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2017-11-17 16:43:52 -0500 |
| commit | fcfa447062b2061e11f68b846d61cbfe60d0d604 (patch) | |
| tree | ea0a4c4cc3f5edfe9c1bdacebd9d09b379334b4b | |
| parent | f02fee227e5f21981152850744a6084ff3fa94ee (diff) | |
NFS: Revert "NFS: Move the flock open mode check into nfs_flock()"
Commit e12937279c8b "NFS: Move the flock open mode check into nfs_flock()"
changed NFSv3 behavior for flock() such that the open mode must match the
lock type, however that requirement shouldn't be enforced for flock().
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Cc: stable@vger.kernel.org # v4.12
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
| -rw-r--r-- | fs/nfs/file.c | 18 | ||||
| -rw-r--r-- | fs/nfs/nfs4proc.c | 14 |
2 files changed, 16 insertions, 16 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c index 0214dd1e1060..81cca49a8375 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -829,23 +829,9 @@ int nfs_flock(struct file *filp, int cmd, struct file_lock *fl) if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FLOCK) is_local = 1; - /* - * VFS doesn't require the open mode to match a flock() lock's type. - * NFS, however, may simulate flock() locking with posix locking which - * requires the open mode to match the lock type. - */ - switch (fl->fl_type) { - case F_UNLCK: + /* We're simulating flock() locks using posix locks on the server */ + if (fl->fl_type == F_UNLCK) return do_unlk(filp, cmd, fl, is_local); - case F_RDLCK: - if (!(filp->f_mode & FMODE_READ)) - return -EBADF; - break; - case F_WRLCK: - if (!(filp->f_mode & FMODE_WRITE)) - return -EBADF; - } - return do_setlk(filp, cmd, fl, is_local); } EXPORT_SYMBOL_GPL(nfs_flock); diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 6b23a032ee1e..56fa5a16e097 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -6709,6 +6709,20 @@ nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) return -ENOLCK; + /* + * Don't rely on the VFS having checked the file open mode, + * since it won't do this for flock() locks. + */ + switch (request->fl_type) { + case F_RDLCK: + if (!(filp->f_mode & FMODE_READ)) + return -EBADF; + break; + case F_WRLCK: + if (!(filp->f_mode & FMODE_WRITE)) + return -EBADF; + } + status = nfs4_set_lock_state(state, request); if (status != 0) return status; |