diff options
| author | San Mehat <san@google.com> | 2011-12-13 01:24:43 +0800 |
|---|---|---|
| committer | Andy Green <andy.green@linaro.org> | 2011-12-26 16:02:17 +0800 |
| commit | c544230d210c556989cf55d1430238eac57c2650 (patch) | |
| tree | 6e382a9a9523b230272a6fe9fed8a1734cccc51d /block | |
| parent | 4e1f84c93e44e58d8b16cd5205304cc766b2888e (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>
Diffstat (limited to 'block')
| -rw-r--r-- | block/genhd.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/block/genhd.c b/block/genhd.c index 02e9fca8082..cc284fa7d8c 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 |