diff options
| author | San Mehat <san@google.com> | 2009-10-10 09:35:24 -0700 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2011-11-30 21:38:14 -0800 |
| commit | cccdf161d25abf929efa998b42b5436ad32f3420 (patch) | |
| tree | 47aee6c783e98940ac7e65660c097ab2e2b866d7 | |
| parent | cb998242b787ce18ff0f7976ae428d114bd4ce7a (diff) | |
block: genhd: Add disk/partition specific uevent callbacks for partition info
For disk devices, a new uevent parameter 'NPARTS' specifies the number
of partitions detected by the kernel. Partition devices get 'PARTN' which
specifies the partitions index in the table.
Signed-off-by: San Mehat <san@google.com>
| -rw-r--r-- | block/genhd.c | 17 | ||||
| -rw-r--r-- | fs/partitions/check.c | 10 |
2 files changed, 27 insertions, 0 deletions
diff --git a/block/genhd.c b/block/genhd.c index d261b73b9744..d3834710b959 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -1105,6 +1105,22 @@ static void disk_release(struct device *dev) blk_put_queue(disk->queue); kfree(disk); } + +static int disk_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + struct gendisk *disk = dev_to_disk(dev); + struct disk_part_iter piter; + struct hd_struct *part; + int cnt = 0; + + disk_part_iter_init(&piter, disk, 0); + while((part = disk_part_iter_next(&piter))) + cnt++; + disk_part_iter_exit(&piter); + add_uevent_var(env, "NPARTS=%u", cnt); + return 0; +} + struct class block_class = { .name = "block", }; @@ -1123,6 +1139,7 @@ static struct device_type disk_type = { .groups = disk_attr_groups, .release = disk_release, .devnode = block_devnode, + .uevent = disk_uevent, }; #ifdef CONFIG_PROC_FS diff --git a/fs/partitions/check.c b/fs/partitions/check.c index e3c63d1c5e13..3c54bbcea5b9 100644 --- a/fs/partitions/check.c +++ b/fs/partitions/check.c @@ -366,10 +366,20 @@ static void part_release(struct device *dev) kfree(p); } +static int part_uevent(struct device *dev, struct kobj_uvent_env *env) +{ + struct gendisk *disk = dev_to_disk(dev); + struct hd_struct *part = dev_to_part(dev); + + add_uevent_var(env, "PARTN=%u", part->partno); + return 0; +} + struct device_type part_type = { .name = "partition", .groups = part_attr_groups, .release = part_release, + .uevent = part_uevent, }; static void delete_partition_rcu_cb(struct rcu_head *head) |