diff options
| author | San Mehat <san@google.com> | 2011-12-02 14:05:37 +0800 |
|---|---|---|
| committer | Andy Green <andy.green@linaro.org> | 2011-12-02 14:05:37 +0800 |
| commit | dbc1560f7f36e9d69939d990c7e5afb71e633e12 (patch) | |
| tree | a3fdb5c48c919cc12806a6cc7f19878b508d8539 | |
| parent | 8854e1544aebf841d902d2016e6097deffaad0f9 (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 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 diff --git a/fs/partitions/check.c b/fs/partitions/check.c index e3c63d1c5e1..3c54bbcea5b 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) |