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bcachefs: Update /dev/disk/by-uuid on device add

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Invalidate pagecache after we write the new superblock and send a
uevent.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2025-06-07 12:01:22 -04:00
parent b76cce1270
commit af5b88618a
1 changed files with 16 additions and 0 deletions
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16
fs/bcachefs/super.c
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@ -1995,6 +1995,22 @@ int bch2_dev_add(struct bch_fs *c, const char *path)
goto err_late;
}
/*
* We just changed the superblock UUID, invalidate cache and send a
* uevent to update /dev/disk/by-uuid
*/
invalidate_bdev(ca->disk_sb.bdev);
char uuid_str[37];
snprintf(uuid_str, sizeof(uuid_str), "UUID=%pUb", &c->sb.uuid);
char *envp[] = {
"CHANGE=uuid",
uuid_str,
NULL,
};
kobject_uevent_env(&ca->disk_sb.bdev->bd_device.kobj, KOBJ_CHANGE, envp);
up_write(&c->state_lock);
out:
printbuf_exit(&label);