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| author | Gabriel de Perthuis <g2p.code@gmail.com> | 2013-06-07 23:27:01 +0200 |
|---|---|---|
| committer | Kent Overstreet <koverstreet@google.com> | 2013-06-26 21:58:05 -0700 |
| commit | a25c32bedeff3573b53572b87bcafe10ec5b75a9 (patch) | |
| tree | d54f5e8c5beebf9084f89147114932d1261a00c4 /drivers/md | |
| parent | bd206b51bca1e0a1c5f4b00218d56213a1f6d3bd (diff) | |
| download | lwn-a25c32bedeff3573b53572b87bcafe10ec5b75a9.tar.gz lwn-a25c32bedeff3573b53572b87bcafe10ec5b75a9.zip | |
bcache: Send a uevent with a cached device's UUID
Signed-off-by: Gabriel de Perthuis <g2p.code@gmail.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/bcache/super.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 8c73f0c7f28a..a104dad2c7fa 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -825,6 +825,11 @@ 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 *env[] = { + "DRIVER=bcache", + kasprintf(GFP_KERNEL, "CACHED_UUID=%pU", dc->sb.uuid), + NULL + }; if (atomic_xchg(&dc->running, 1)) return; @@ -841,10 +846,11 @@ void bch_cached_dev_run(struct cached_dev *dc) add_disk(d->disk); bd_link_disk_holder(dc->bdev, dc->disk.disk); -#if 0 - char *env[] = { "SYMLINK=label" , NULL }; + /* won't show up in the uevent file, use udevadm monitor -e instead + * only class / kset properties are persistent */ 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") || sysfs_create_link(&disk_to_dev(d->disk)->kobj, &d->kobj, "bcache")) pr_debug("error creating sysfs link"); |