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bcache: Send label uevents

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Signed-off-by: Gabriel de Perthuis <g2p.code@gmail.com>
Signed-off-by: Kent Overstreet <koverstreet@google.com>
This commit is contained in:
Gabriel de Perthuis 2013-06-09 00:54:48 +02:00 committed by Kent Overstreet
parent a25c32bede
commit ab9e14002e
2 changed files with 17 additions and 1 deletions
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9
drivers/md/bcache/super.c
View file

@ -825,12 +825,18 @@ static void calc_cached_dev_sectors(struct cache_set *c)
void bch_cached_dev_run(struct cached_dev *dc)
{
struct bcache_device *d = &dc->disk;
char buf[SB_LABEL_SIZE + 1];
char *env[] = {
"DRIVER=bcache",
kasprintf(GFP_KERNEL, "CACHED_UUID=%pU", dc->sb.uuid),
NULL
NULL,
NULL,
};
memcpy(buf, dc->sb.label, SB_LABEL_SIZE);
buf[SB_LABEL_SIZE] = '\0';
env[2] = kasprintf(GFP_KERNEL, "CACHED_LABEL=%s", buf);
if (atomic_xchg(&dc->running, 1))
return;
@ -850,6 +856,7 @@ void bch_cached_dev_run(struct cached_dev *dc)
* only class / kset properties are persistent */
kobject_uevent_env(&disk_to_dev(d->disk)->kobj, KOBJ_CHANGE, env);
kfree(env[1]);
kfree(env[2]);
if (sysfs_create_link(&d->kobj, &disk_to_dev(d->disk)->kobj, "dev") ||
sysfs_create_link(&disk_to_dev(d->disk)->kobj, &d->kobj, "bcache"))

9
drivers/md/bcache/sysfs.c
View file

@ -178,6 +178,7 @@ STORE(__cached_dev)
disk.kobj);
unsigned v = size;
struct cache_set *c;
struct kobj_uevent_env *env;
#define d_strtoul(var) sysfs_strtoul(var, dc->var)
#define d_strtoi_h(var) sysfs_hatoi(var, dc->var)
@ -222,6 +223,7 @@ STORE(__cached_dev)
}
if (attr == &sysfs_label) {
/* note: endlines are preserved */
memcpy(dc->sb.label, buf, SB_LABEL_SIZE);
bch_write_bdev_super(dc, NULL);
if (dc->disk.c) {
@ -229,6 +231,13 @@ STORE(__cached_dev)
buf, SB_LABEL_SIZE);
bch_uuid_write(dc->disk.c);
}
env = kzalloc(sizeof(struct kobj_uevent_env), GFP_KERNEL);
add_uevent_var(env, "DRIVER=bcache");
add_uevent_var(env, "CACHED_UUID=%pU", dc->sb.uuid),
add_uevent_var(env, "CACHED_LABEL=%s", buf);
kobject_uevent_env(
&disk_to_dev(dc->disk.disk)->kobj, KOBJ_CHANGE, env->envp);
kfree(env);
}
if (attr == &sysfs_attach) {