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authorChris Mason <chris.mason@oracle.com>2009-01-05 16:57:23 -0500
committerChris Mason <chris.mason@oracle.com>2009-01-05 16:57:23 -0500
commite441d54de4fd97dd381f3e73636f5ba51ff4c7d9 (patch)
treeb0d664ffaa89cec80e6aaac11977c7f6aa92ff63 /fs/btrfs/super.c
parentb34b086c1c1d934c5314d46ba25ccfa9acc471ae (diff)
Btrfs: add permission checks to the ioctls
Only root can add/remove devices Only root can defrag subtrees Only files open for writing can be defragged Only files open for writing can be the destination for a clone Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/super.c')
-rw-r--r--fs/btrfs/super.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 84c3b66564d..3814238d6eb 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -589,6 +589,9 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
int ret = 0;
int len;
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
vol = kmalloc(sizeof(*vol), GFP_KERNEL);
if (copy_from_user(vol, (void __user *)arg, sizeof(*vol))) {
ret = -EFAULT;