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authorJeff Layton <jlayton@redhat.com>2014-02-03 21:13:08 +0400
committerJeff Layton <jlayton@redhat.com>2014-03-31 16:24:42 +0400
commitbce7560d4946dcfc07b0217b1d3862ed60ff7188 (patch)
tree548ef2a83300ee6c4fede7a20be30aee13b9ca5f /fs/locks.c
parentef12e72a01f3022c55e5a8e0fa1caebdc7efcfce (diff)
downloadlinux-bce7560d4946dcfc07b0217b1d3862ed60ff7188.tar.xz
locks: consolidate checks for compatible filp->f_mode values in setlk handlers
Move this check into flock64_to_posix_lock instead of duplicating it in two places. This also fixes a minor wart in the code where we continue referring to the struct flock after converting it to struct file_lock. Acked-by: J. Bruce Fields <bfields@fieldses.org> Signed-off-by: Jeff Layton <jlayton@redhat.com>
Diffstat (limited to 'fs/locks.c')
-rw-r--r--fs/locks.c46
1 files changed, 12 insertions, 34 deletions
diff --git a/fs/locks.c b/fs/locks.c
index b49e853a9c7b..4cd25781b0a4 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -388,6 +388,18 @@ static int flock64_to_posix_lock(struct file *filp, struct file_lock *fl,
fl->fl_ops = NULL;
fl->fl_lmops = NULL;
+ /* Ensure that fl->fl_filp has compatible f_mode */
+ switch (l->l_type) {
+ case F_RDLCK:
+ if (!(filp->f_mode & FMODE_READ))
+ return -EBADF;
+ break;
+ case F_WRLCK:
+ if (!(filp->f_mode & FMODE_WRITE))
+ return -EBADF;
+ break;
+ }
+
return assign_type(fl, l->l_type);
}
@@ -2025,23 +2037,6 @@ again:
file_lock->fl_flags |= FL_SLEEP;
}
- error = -EBADF;
- switch (flock.l_type) {
- case F_RDLCK:
- if (!(filp->f_mode & FMODE_READ))
- goto out;
- break;
- case F_WRLCK:
- if (!(filp->f_mode & FMODE_WRITE))
- goto out;
- break;
- case F_UNLCK:
- break;
- default:
- error = -EINVAL;
- goto out;
- }
-
error = do_lock_file_wait(filp, cmd, file_lock);
/*
@@ -2143,23 +2138,6 @@ again:
file_lock->fl_flags |= FL_SLEEP;
}
- error = -EBADF;
- switch (flock.l_type) {
- case F_RDLCK:
- if (!(filp->f_mode & FMODE_READ))
- goto out;
- break;
- case F_WRLCK:
- if (!(filp->f_mode & FMODE_WRITE))
- goto out;
- break;
- case F_UNLCK:
- break;
- default:
- error = -EINVAL;
- goto out;
- }
-
error = do_lock_file_wait(filp, cmd, file_lock);
/*