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Commit 99d03c141b40914b67d63c9d23b8da4386422ed7

Authored by NeilBrown
Committed by Alasdair G Kergon
1 parent 9d357b0787
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

dm: per target unplug callback support 

Add per-target unplug callback support.

Cc: linux-raid@vger.kernel.org
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

Showing 2 changed files with 6 additions and 0 deletions Side-by-side Diff

drivers/md/dm-table.c
Diff comments   View file @ 99d03c1
... ... @@ -1278,6 +1278,7 @@
1278 1278 {
1279 1279 struct dm_dev_internal *dd;
1280 1280 struct list_head *devices = dm_table_get_devices(t);
  1281 + struct dm_target_callbacks *cb;
1281 1282  
1282 1283 list_for_each_entry(dd, devices, list) {
1283 1284 struct request_queue *q = bdev_get_queue(dd->dm_dev.bdev);
... ... @@ -1290,6 +1291,10 @@
1290 1291 dm_device_name(t->md),
1291 1292 bdevname(dd->dm_dev.bdev, b));
1292 1293 }
  1294 +
  1295 + list_for_each_entry(cb, &t->target_callbacks, list)
  1296 + if (cb->unplug_fn)
  1297 + cb->unplug_fn(cb);
1293 1298 }
1294 1299  
1295 1300 struct mapped_device *dm_table_get_md(struct dm_table *t)
include/linux/device-mapper.h
Diff comments   View file @ 99d03c1
... ... @@ -197,6 +197,7 @@
197 197 struct dm_target_callbacks {
198 198 struct list_head list;
199 199 int (*congested_fn) (struct dm_target_callbacks *, int);
  200 + void (*unplug_fn)(struct dm_target_callbacks *);
200 201 };
201 202  
202 203 int dm_register_target(struct target_type *t);