[PATCH] eCryptfs: add flush_dcache_page() calls

[linux-drm-fsl-dcu.git] / fs / quota.c

diff --git a/fs/quota.c b/fs/quota.c
index d6a2be826e29880abd0f6873caa2344f88f2c5f8..b9dae76a0b6e2212083efa9ca0281e31661c0375 100644 (file)
--- a/fs/quota.c
+++ b/fs/quota.c
@@ -337,6 +337,34 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id, void
        return 0;
 }
 
+/*
+ * look up a superblock on which quota ops will be performed
+ * - use the name of a block device to find the superblock thereon
+ */
+static inline struct super_block *quotactl_block(const char __user *special)
+{
+#ifdef CONFIG_BLOCK
+       struct block_device *bdev;
+       struct super_block *sb;
+       char *tmp = getname(special);
+
+       if (IS_ERR(tmp))
+               return ERR_PTR(PTR_ERR(tmp));
+       bdev = lookup_bdev(tmp);
+       putname(tmp);
+       if (IS_ERR(bdev))
+               return ERR_PTR(PTR_ERR(bdev));
+       sb = get_super(bdev);
+       bdput(bdev);
+       if (!sb)
+               return ERR_PTR(-ENODEV);
+
+       return sb;
+#else
+       return ERR_PTR(-ENODEV);
+#endif
+}
+
 /*
  * This is the system call interface. This communicates with
  * the user-level programs. Currently this only supports diskquota
@@ -347,25 +375,15 @@ asmlinkage long sys_quotactl(unsigned int cmd, const char __user *special, qid_t
 {
        uint cmds, type;
        struct super_block *sb = NULL;
-       struct block_device *bdev;
-       char *tmp;
        int ret;
 
        cmds = cmd >> SUBCMDSHIFT;
        type = cmd & SUBCMDMASK;
 
        if (cmds != Q_SYNC || special) {
-               tmp = getname(special);
-               if (IS_ERR(tmp))
-                       return PTR_ERR(tmp);
-               bdev = lookup_bdev(tmp);
-               putname(tmp);
-               if (IS_ERR(bdev))
-                       return PTR_ERR(bdev);
-               sb = get_super(bdev);
-               bdput(bdev);
-               if (!sb)
-                       return -ENODEV;
+               sb = quotactl_block(special);
+               if (IS_ERR(sb))
+                       return PTR_ERR(sb);
        }
 
        ret = check_quotactl_valid(sb, type, cmds, id);