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Commit ce723c31 authored by Yongqiang Yang's avatar Yongqiang Yang Committed by Theodore Ts'o
Browse files

ext4: prevent a fs with errors from being resized 



A filesystem with errors is not allowed to being resized, otherwise,
it is easy to destroy the filesystem.

Signed-off-by: default avatarYongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent 8f82f840

fs/ext4/resize.c

+10 −0
Original line number Diff line number Diff line
@@ -23,6 +23,16 @@ int ext4_resize_begin(struct super_block *sb) 
	if (!capable(CAP_SYS_RESOURCE))

		return -EPERM;



	/*

	 * We are not allowed to do online-resizing on a filesystem mounted

	 * with error, because it can destroy the filesystem easily.

	 */

	if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {

		ext4_warning(sb, "There are errors in the filesystem, "

			     "so online resizing is not allowed\n");

		return -EPERM;

	}



	if (test_and_set_bit_lock(EXT4_RESIZING, &EXT4_SB(sb)->s_resize_flags))

		ret = -EBUSY;