Messages in this thread | | | Date | Tue, 9 Apr 2024 16:47:44 +0800 | Subject | Re: [PATCH] erofs: derive fsid from on-disk UUID for .statfs() if possible | From | Gao Xiang <> |
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On 2024/4/9 16:11, Hongzhen Luo wrote: > Use the superblock's UUID to generate the fsid when it's non-null. > > Signed-off-by: Hongzhen Luo <hongzhen@linux.alibaba.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Thanks, Gao Xiang
> --- > fs/erofs/super.c | 12 +++++------- > 1 file changed, 5 insertions(+), 7 deletions(-) > > diff --git a/fs/erofs/super.c b/fs/erofs/super.c > index c0eb139adb07..83bd8ee3b5ba 100644 > --- a/fs/erofs/super.c > +++ b/fs/erofs/super.c > @@ -923,22 +923,20 @@ 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((__u8 *)&sb->s_uuid); > return 0; > } >
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