From ac0949ebe87beb9cc06a4f27ab6be1bd39c2fa3c Mon Sep 17 00:00:00 2001 From: San Mehat Date: Sat, 10 Oct 2009 09:35:24 -0700 Subject: 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, and 'PARTNAME', which specifies PARTNAME specifices the partition name of a partition device Signed-off-by: Dima Zavin --- block/genhd.c | 17 +++++++++++++++++ block/partition-generic.c | 11 +++++++++++ 2 files changed, 28 insertions(+) (limited to 'block') diff --git a/block/genhd.c b/block/genhd.c index 20625eed5511..a534eafa7a53 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -1107,6 +1107,22 @@ 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", }; @@ -1126,6 +1142,7 @@ 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/block/partition-generic.c b/block/partition-generic.c index 789cdea05893..c7942acf1379 100644 --- a/block/partition-generic.c +++ b/block/partition-generic.c @@ -216,10 +216,21 @@ static void part_release(struct device *dev) kfree(p); } +static int part_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + struct hd_struct *part = dev_to_part(dev); + + add_uevent_var(env, "PARTN=%u", part->partno); + if (part->info && part->info->volname[0]) + add_uevent_var(env, "PARTNAME=%s", part->info->volname); + 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) -- cgit v1.2.3