xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ext4: store checksum seed in superblock

Browse Source 
Allow the filesystem to store the metadata checksum seed in the
superblock and add an incompat feature to say that we're using it.
This enables tune2fs to change the UUID on a mounted metadata_csum
FS without having to (racy!) rewrite all disk metadata.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Darrick J. Wong
2015-10-17 16:16:02 -04:00
committed by Theodore Ts'o
parent 8b4953e13f
commit 8c81bd8f58
3 changed files with 10 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
fs/ext4/sysfs.c
View File

@@ -224,12 +224,14 @@ EXT4_ATTR_FEATURE(lazy_itable_init);
EXT4_ATTR_FEATURE(batched_discard);
EXT4_ATTR_FEATURE(meta_bg_resize);
EXT4_ATTR_FEATURE(encryption);
EXT4_ATTR_FEATURE(metadata_csum_seed);
static struct attribute *ext4_feat_attrs[] = {
ATTR_LIST(lazy_itable_init),
ATTR_LIST(batched_discard),
ATTR_LIST(meta_bg_resize),
ATTR_LIST(encryption),
ATTR_LIST(metadata_csum_seed),
NULL,
};