ext4: add shutdown bit and check for it
Add a shutdown bit that will cause ext4 processing to fail immediately
with EIO.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 2e7e02f..35d93ab 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1836,6 +1836,12 @@ static inline bool ext4_has_incompat_features(struct super_block *sb)
* Superblock flags
*/
#define EXT4_FLAGS_RESIZING 0
+#define EXT4_FLAGS_SHUTDOWN 1
+
+static inline int ext4_forced_shutdown(struct ext4_sb_info *sbi)
+{
+ return test_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
+}
/*