linux-kernel - [PATCH 1/2] bcachefs: Add support for FS_IOC

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Message-Id: <20240709011134.79954-1-youling.tang@linux.dev>
Date: Tue,  9 Jul 2024 09:11:33 +0800
From: Youling Tang <youling.tang@...ux.dev>
To: Kent Overstreet <kent.overstreet@...ux.dev>
Cc: linux-bcachefs@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Youling Tang <youling.tang@...ux.dev>,
	Youling Tang <tangyouling@...inos.cn>
Subject: [PATCH 1/2] bcachefs: Add support for FS_IOC_GETFSUUID

From: Kent Overstreet <kent.overstreet@...ux.dev>

Use super_set_uuid() to set `sb->s_uuid_len` to avoid returning `-ENOTTY`
with sb->s_uuid_len being 0.

Original patch link:
[1]: https://lore.kernel.org/all/20240207025624.1019754-2-kent.overstreet@linux.dev/

Signed-off-by: Kent Overstreet <kent.overstreet@...ux.dev>
Signed-off-by: Youling Tang <tangyouling@...inos.cn>
---
 fs/bcachefs/fs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/bcachefs/fs.c b/fs/bcachefs/fs.c
index 3ea8dbc4d8e4..011ee5075a52 100644
--- a/fs/bcachefs/fs.c
+++ b/fs/bcachefs/fs.c
@@ -1977,7 +1977,7 @@ static int bch2_fs_get_tree(struct fs_context *fc)
 	sb->s_time_gran		= c->sb.nsec_per_time_unit;
 	sb->s_time_min		= div_s64(S64_MIN, c->sb.time_units_per_sec) + 1;
 	sb->s_time_max		= div_s64(S64_MAX, c->sb.time_units_per_sec);
-	sb->s_uuid		= c->sb.user_uuid;
+	super_set_uuid(sb, c->sb.user_uuid.b, sizeof(c->sb.user_uuid));
 	sb->s_shrink->seeks	= 0;
 	c->vfs_sb		= sb;
 	strscpy(sb->s_id, c->name, sizeof(sb->s_id));
-- 
2.34.1