dquot: move dquot transfer responsibility into the filesystem

Currently notify_change calls vfs_dq_transfer directly.  This means
we tie the quota code into the VFS.  Get rid of that and make the
filesystem responsible for the transfer.  Most filesystems already
do this, only ufs and udf need the code added, and for jfs it needs to
be enabled unconditionally instead of only when ACLs are enabled.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>

fs/jfs/file.c

@@ -18,6 +18,7 @@
  */
 
 #include <linux/fs.h>
+#include <linux/quotaops.h>
 #include "jfs_incore.h"
 #include "jfs_inode.h"
 #include "jfs_dmap.h"
@@ -88,14 +89,37 @@ static int jfs_release(struct inode *inode, struct file *file)
 	return 0;
 }
 
+int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
+{
+	struct inode *inode = dentry->d_inode;
+	int rc;
+
+	rc = inode_change_ok(inode, iattr);
+	if (rc)
+		return rc;
+
+	if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
+	    (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) {
+		if (vfs_dq_transfer(inode, iattr))
+			return -EDQUOT;
+	}
+
+	rc = inode_setattr(inode, iattr);
+
+	if (!rc && (iattr->ia_valid & ATTR_MODE))
+		rc = jfs_acl_chmod(inode);
+
+	return rc;
+}
+
 const struct inode_operations jfs_file_inode_operations = {
 	.truncate	= jfs_truncate,
 	.setxattr	= jfs_setxattr,
 	.getxattr	= jfs_getxattr,
 	.listxattr	= jfs_listxattr,
 	.removexattr	= jfs_removexattr,
-#ifdef CONFIG_JFS_POSIX_ACL
 	.setattr	= jfs_setattr,
+#ifdef CONFIG_JFS_POSIX_ACL
 	.check_acl	= jfs_check_acl,
 #endif
 };