From ef851d44a83ed625ec22eae6bd36a1348c8af571 Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Thu, 15 Aug 2024 16:44:05 +0900 Subject: nilfs2: add support for FS_IOC_GETUUID Patch series "nilfs2: add support for some common ioctls". This series adds support for common ioctls to nilfs2 for getting the volume UUID and the relative path of an FS instance within the sysfs namespace, and also implements ioctls for nilfs2 to get and set the volume label. This patch (of 2): Expose the UUID of a file system instance using the super_set_uuid helper and support the FS_IOC_GETUUID ioctl. Link: https://lkml.kernel.org/r/20240815074408.5550-1-konishi.ryusuke@gmail.com Link: https://lkml.kernel.org/r/20240815074408.5550-2-konishi.ryusuke@gmail.com Signed-off-by: Ryusuke Konishi Signed-off-by: Andrew Morton --- fs/nilfs2/super.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'fs/nilfs2') diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index e835e1f5a712..167050b3ce7e 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -1063,6 +1063,9 @@ nilfs_fill_super(struct super_block *sb, struct fs_context *fc) if (err) goto failed_nilfs; + super_set_uuid(sb, nilfs->ns_sbp[0]->s_uuid, + sizeof(nilfs->ns_sbp[0]->s_uuid)); + cno = nilfs_last_cno(nilfs); err = nilfs_attach_checkpoint(sb, cno, true, &fsroot); if (err) { -- cgit v1.2.3-70-g09d2