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authorSan Mehat <san@google.com>2009-10-10 09:35:24 -0700
committerColin Cross <ccross@android.com>2014-03-19 13:07:51 -0700
commit8ae3e16bac26f02fb49ad694cb22a5adc7b02510 (patch)
tree721f827245ce4f95525dfda3fc373f302516382f /block
parent4b152645bab71f3d36c4c3169a7c49d7948e0de8 (diff)
downloadlinux-linaro-stable-8ae3e16bac26f02fb49ad694cb22a5adc7b02510.tar.gz
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 <dima@android.com>
Diffstat (limited to 'block')
-rw-r--r--block/genhd.c17
-rw-r--r--block/partition-generic.c11
2 files changed, 28 insertions, 0 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 791f41943132..3bceeb40aec2 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)