nilfs2: add support for FS_IOC_GETFSSYSFSPATH

Use the standard helper super_set_sysfs_name_bdev() to give the sysfs
subpath of the filesystem for the FS_IOC_GETFSSYSFSPATH ioctl.

For nilfs2, it will output "nilfs2/<dev>".

Link: https://lkml.kernel.org/r/20240815074408.5550-3-konishi.ryusuke@gmail.com
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 167050b3ce7e0865e23dbb475a8732927966cbea..76e35e6773d1f9d6a028a2150667cddd485909c0 100644 (file)
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -1065,6 +1065,7 @@ nilfs_fill_super(struct super_block *sb, struct fs_context *fc)
 
        super_set_uuid(sb, nilfs->ns_sbp[0]->s_uuid,
                       sizeof(nilfs->ns_sbp[0]->s_uuid));
+       super_set_sysfs_name_bdev(sb);
 
        cno = nilfs_last_cno(nilfs);
        err = nilfs_attach_checkpoint(sb, cno, true, &fsroot);