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| author | Hongzhen Luo <hongzhen@linux.alibaba.com> | 2024-04-09 14:30:22 +0300 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2024-05-08 12:12:51 +0300 |
| commit | 1872df8dcd87bd1e623e1a70076d08636b9c473d (patch) | |
| tree | fa177e05aa0cf8a10e5baf4ad7093ef5a00e8df2 /fs | |
| parent | 0f6273ab46375b62c8dd5c987ce7c15877602831 (diff) | |
| download | linux-1872df8dcd87bd1e623e1a70076d08636b9c473d.tar.xz | |
erofs: derive fsid from on-disk UUID for .statfs() if possible
Use the superblock's UUID to generate the fsid when it's non-null.
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Hongzhen Luo <hongzhen@linux.alibaba.com>
Link: https://lore.kernel.org/r/20240409113022.74720-1-hongzhen@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/erofs/super.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/fs/erofs/super.c b/fs/erofs/super.c index c1dae1fb949b..e3438f1a7bac 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -914,22 +914,20 @@ static int erofs_statfs(struct dentry *dentry, struct kstatfs *buf) { struct super_block *sb = dentry->d_sb; struct erofs_sb_info *sbi = EROFS_SB(sb); - u64 id = 0; - - if (!erofs_is_fscache_mode(sb)) - id = huge_encode_dev(sb->s_bdev->bd_dev); buf->f_type = sb->s_magic; buf->f_bsize = sb->s_blocksize; buf->f_blocks = sbi->total_blocks; buf->f_bfree = buf->f_bavail = 0; - buf->f_files = ULLONG_MAX; buf->f_ffree = ULLONG_MAX - sbi->inos; - buf->f_namelen = EROFS_NAME_LEN; - buf->f_fsid = u64_to_fsid(id); + if (uuid_is_null(&sb->s_uuid)) + buf->f_fsid = u64_to_fsid(erofs_is_fscache_mode(sb) ? 0 : + huge_encode_dev(sb->s_bdev->bd_dev)); + else + buf->f_fsid = uuid_to_fsid(sb->s_uuid.b); return 0; } |