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bcachefs: Add support for FS_IOC_GETFSUUID

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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@linux.dev>
Signed-off-by: Youling Tang <tangyouling@kylinos.cn>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
2024-07-09 09:11:33 +08:00
parent 4fa5d8e166
commit 4f1a6b0ab4
1 changed files with 1 additions and 1 deletions
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fs/bcachefs/fs.c
+1 -1
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@@ -2216,7 +2216,7 @@ got_sb:
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));