Commit e1293727 authored by Benjamin Coddington's avatar Benjamin Coddington Committed by Trond Myklebust

NFS: Move the flock open mode check into nfs_flock()

We only need to check lock exclusive/shared types against open mode when
flock() is used on NFS, so move it into the flock-specific path instead of
checking it for all locks.
Signed-off-by: default avatarBenjamin Coddington <bcodding@redhat.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 12a16d15
...@@ -820,9 +820,23 @@ int nfs_flock(struct file *filp, int cmd, struct file_lock *fl) ...@@ -820,9 +820,23 @@ int nfs_flock(struct file *filp, int cmd, struct file_lock *fl)
if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FLOCK) if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FLOCK)
is_local = 1; is_local = 1;
/* We're simulating flock() locks using posix locks on the server */ /*
if (fl->fl_type == F_UNLCK) * 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:
return do_unlk(filp, cmd, fl, is_local); 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); return do_setlk(filp, cmd, fl, is_local);
} }
EXPORT_SYMBOL_GPL(nfs_flock); EXPORT_SYMBOL_GPL(nfs_flock);
......
...@@ -6469,20 +6469,6 @@ nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) ...@@ -6469,20 +6469,6 @@ nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
!test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
return -ENOLCK; 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); status = nfs4_set_lock_state(state, request);
if (status != 0) if (status != 0)
return status; return status;
......
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