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| author |   Balbir Singh <sblbir@amazon.com> | 2020-03-13 05:30:05 +0000 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2020-03-18 15:13:21 -0600 |
| commit | e598a72faeb543599bdf0d930df3a71906404e6f (patch) | |
| tree | 140f53a0a76614caf6c1bfddfdd883cc2f887ae0 /block/genhd.c | |
| parent | block: Prevent hung_check firing during long sync IO (diff) | |
| download | wireguard-linux-e598a72faeb543599bdf0d930df3a71906404e6f.tar.xz wireguard-linux-e598a72faeb543599bdf0d930df3a71906404e6f.zip | |
block/genhd: Notify udev about capacity change
Allow block/genhd to notify user space (via udev) about disk size changes
using a new helper set_capacity_revalidate_and_notify(), which is a wrapper
on top of set_capacity(). set_capacity_revalidate_and_notify() will only
notify via udev if the current capacity or the target capacity is not zero
and iff the capacity changes.
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Someswarudu Sangaraju <ssomesh@amazon.com>
Signed-off-by: Balbir Singh <sblbir@amazon.com>
Reviewed-by: Bob Liu <bob.liu@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/genhd.c')
| -rw-r--r-- | block/genhd.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/block/genhd.c b/block/genhd.c index ff6268970ddc..6a60131baffa 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -46,6 +46,30 @@ static void disk_add_events(struct gendisk *disk); static void disk_del_events(struct gendisk *disk); static void disk_release_events(struct gendisk *disk); +/* + * Set disk capacity and notify if the size is not currently + * zero and will not be set to zero + */ +void set_capacity_revalidate_and_notify(struct gendisk *disk, sector_t size, + bool revalidate) +{ + sector_t capacity = get_capacity(disk); + + set_capacity(disk, size); + + if (revalidate) + revalidate_disk(disk); + + if (capacity != size && capacity != 0 && size != 0) { + char *envp[] = { "RESIZE=1", NULL }; + + kobject_uevent_env(&disk_to_dev(disk)->kobj, KOBJ_CHANGE, envp); + } +} + +EXPORT_SYMBOL_GPL(set_capacity_revalidate_and_notify); + + void part_inc_in_flight(struct request_queue *q, struct hd_struct *part, int rw) { if (queue_is_mq(q)) |