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nilfs2: add support for FS_IOC_GETUUID

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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 <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Ryusuke Konishi 2024-08-15 16:44:05 +09:00 committed by Andrew Morton
parent 16d9691ad4
commit ef851d44a8
1 changed files with 3 additions and 0 deletions
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3
fs/nilfs2/super.c
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@ -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) {