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| author |   Amir Goldstein <amir73il@gmail.com> | 2021-03-22 19:39:43 +0200 |
|---|---|---|
| committer |   Jan Kara <jack@suse.cz> | 2021-04-19 16:03:15 +0200 |
| commit | 9591c3a34f7722bd77f42c98d76fd5a5bad465f0 (patch) | |
| tree | 44001867b11da3de1fa029e50ab636ea381c0c7a /fs/ext4 | |
| parent | fanotify_user: use upper_32_bits() to verify mask (diff) | |
| download | linux-dev-9591c3a34f7722bd77f42c98d76fd5a5bad465f0.tar.xz linux-dev-9591c3a34f7722bd77f42c98d76fd5a5bad465f0.zip | |
fs: introduce a wrapper uuid_to_fsid()
Some filesystem's use a digest of their uuid for f_fsid.
Create a simple wrapper for this open coded folding.
Filesystems that have a non null uuid but use the block device
number for f_fsid may also consider using this helper.
[JK: Added missing asm/byteorder.h include]
Link: https://lore.kernel.org/r/20210322173944.449469-2-amir73il@gmail.com
Acked-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/super.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index ad34a37278cd..3581c1cdc19e 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -6148,7 +6148,6 @@ static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) struct ext4_sb_info *sbi = EXT4_SB(sb); struct ext4_super_block *es = sbi->s_es; ext4_fsblk_t overhead = 0, resv_blocks; - u64 fsid; s64 bfree; resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); @@ -6169,9 +6168,7 @@ static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) buf->f_files = le32_to_cpu(es->s_inodes_count); buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); buf->f_namelen = EXT4_NAME_LEN; - fsid = le64_to_cpup((void *)es->s_uuid) ^ - le64_to_cpup((void *)es->s_uuid + sizeof(u64)); - buf->f_fsid = u64_to_fsid(fsid); + buf->f_fsid = uuid_to_fsid(es->s_uuid); #ifdef CONFIG_QUOTA if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && |