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bcache: Send a uevent with a cached device's UUID

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Signed-off-by: Gabriel de Perthuis <g2p.code@gmail.com>
This commit is contained in:
Gabriel de Perthuis 2013-06-07 23:27:01 +02:00 committed by Kent Overstreet
parent bd206b51bc
commit a25c32bede
1 changed files with 9 additions and 3 deletions
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12
drivers/md/bcache/super.c
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@ -825,6 +825,11 @@ static void calc_cached_dev_sectors(struct cache_set *c)
void bch_cached_dev_run(struct cached_dev *dc) void bch_cached_dev_run(struct cached_dev *dc)
{ {
struct bcache_device *d = &dc->disk; struct bcache_device *d = &dc->disk;
char *env[] = {
"DRIVER=bcache",
kasprintf(GFP_KERNEL, "CACHED_UUID=%pU", dc->sb.uuid),
NULL
};
if (atomic_xchg(&dc->running, 1)) if (atomic_xchg(&dc->running, 1))
return; return;
@ -841,10 +846,11 @@ void bch_cached_dev_run(struct cached_dev *dc)
add_disk(d->disk); add_disk(d->disk);
bd_link_disk_holder(dc->bdev, dc->disk.disk); bd_link_disk_holder(dc->bdev, dc->disk.disk);
#if 0 /* won't show up in the uevent file, use udevadm monitor -e instead
char *env[] = { "SYMLINK=label" , NULL }; * only class / kset properties are persistent */
kobject_uevent_env(&disk_to_dev(d->disk)->kobj, KOBJ_CHANGE, env); kobject_uevent_env(&disk_to_dev(d->disk)->kobj, KOBJ_CHANGE, env);
#endif kfree(env[1]);
if (sysfs_create_link(&d->kobj, &disk_to_dev(d->disk)->kobj, "dev") || 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")) sysfs_create_link(&disk_to_dev(d->disk)->kobj, &d->kobj, "bcache"))
pr_debug("error creating sysfs link"); pr_debug("error creating sysfs link");