userns: Convert btrfs to use kuid/kgid where appropriate

Cc: Chris Mason <chris.mason@fusionio.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

fs/btrfs/delayed-inode.c

@@ -1715,8 +1715,8 @@ static void fill_stack_inode_item(struct btrfs_trans_handle *trans,
 				  struct btrfs_inode_item *inode_item,
 				  struct inode *inode)
 {
-	btrfs_set_stack_inode_uid(inode_item, inode->i_uid);
-	btrfs_set_stack_inode_gid(inode_item, inode->i_gid);
+	btrfs_set_stack_inode_uid(inode_item, i_uid_read(inode));
+	btrfs_set_stack_inode_gid(inode_item, i_gid_read(inode));
 	btrfs_set_stack_inode_size(inode_item, BTRFS_I(inode)->disk_i_size);
 	btrfs_set_stack_inode_mode(inode_item, inode->i_mode);
 	btrfs_set_stack_inode_nlink(inode_item, inode->i_nlink);
@@ -1764,8 +1764,8 @@ int btrfs_fill_inode(struct inode *inode, u32 *rdev)
 
 	inode_item = &delayed_node->inode_item;
 
-	inode->i_uid = btrfs_stack_inode_uid(inode_item);
-	inode->i_gid = btrfs_stack_inode_gid(inode_item);
+	i_uid_write(inode, btrfs_stack_inode_uid(inode_item));
+	i_gid_write(inode, btrfs_stack_inode_gid(inode_item));
 	btrfs_i_size_write(inode, btrfs_stack_inode_size(inode_item));
 	inode->i_mode = btrfs_stack_inode_mode(inode_item);
 	set_nlink(inode, btrfs_stack_inode_nlink(inode_item));

fs/btrfs/inode.c

@@ -2570,8 +2570,8 @@ static void btrfs_read_locked_inode(struct inode *inode)
 				    struct btrfs_inode_item);
 	inode->i_mode = btrfs_inode_mode(leaf, inode_item);
 	set_nlink(inode, btrfs_inode_nlink(leaf, inode_item));
-	inode->i_uid = btrfs_inode_uid(leaf, inode_item);
-	inode->i_gid = btrfs_inode_gid(leaf, inode_item);
+	i_uid_write(inode, btrfs_inode_uid(leaf, inode_item));
+	i_gid_write(inode, btrfs_inode_gid(leaf, inode_item));
 	btrfs_i_size_write(inode, btrfs_inode_size(leaf, inode_item));
 
 	tspec = btrfs_inode_atime(inode_item);
@@ -2649,8 +2649,8 @@ static void fill_inode_item(struct btrfs_trans_handle *trans,
 			    struct btrfs_inode_item *item,
 			    struct inode *inode)
 {
-	btrfs_set_inode_uid(leaf, item, inode->i_uid);
-	btrfs_set_inode_gid(leaf, item, inode->i_gid);
+	btrfs_set_inode_uid(leaf, item, i_uid_read(inode));
+	btrfs_set_inode_gid(leaf, item, i_gid_read(inode));
 	btrfs_set_inode_size(leaf, item, BTRFS_I(inode)->disk_i_size);
 	btrfs_set_inode_mode(leaf, item, inode->i_mode);
 	btrfs_set_inode_nlink(leaf, item, inode->i_nlink);

fs/btrfs/ioctl.c

@@ -575,13 +575,13 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
 */
 static inline int btrfs_check_sticky(struct inode *dir, struct inode *inode)
 {
-	uid_t fsuid = current_fsuid();
+	kuid_t fsuid = current_fsuid();
 
 	if (!(dir->i_mode & S_ISVTX))
 		return 0;
-	if (inode->i_uid == fsuid)
+	if (uid_eq(inode->i_uid, fsuid))
 		return 0;
-	if (dir->i_uid == fsuid)
+	if (uid_eq(dir->i_uid, fsuid))
 		return 0;
 	return !capable(CAP_FOWNER);
 }

init/Kconfig

@@ -930,7 +930,6 @@ config UIDGID_CONVERTED
 	depends on 9P_FS = n
 	depends on AFS_FS = n
 	depends on AUTOFS4_FS = n
-	depends on BTRFS_FS = n
 	depends on CEPH_FS = n
 	depends on CIFS = n
 	depends on CODA_FS = n