From: Ryusuke Konishi Date: Thu, 15 Aug 2024 07:44:05 +0000 (+0900) Subject: nilfs2: add support for FS_IOC_GETUUID X-Git-Tag: v6.12-rc1~114^2~54 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ef851d44a83ed625ec22eae6bd36a1348c8af571;p=thirdparty%2Fkernel%2Flinux.git 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 --- diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index e835e1f5a7120..167050b3ce7e0 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) {