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authorKiyoshi Ueda <k-ueda@ct.jp.nec.com>2009-12-10 23:52:27 +0000
committerAlasdair G Kergon <agk@redhat.com>2009-12-10 23:52:27 +0000
commit64dbce580d5a7e89e8de20b91f80c7267cdad91d (patch)
tree9d8a8bb8afd9d7b856d90abd7c5c35137547d09a
parent4f186f8bbfa92bf1a2b39f7a8674348bfdba9437 (diff)
downloadop-kernel-dev-64dbce580d5a7e89e8de20b91f80c7267cdad91d.zip
op-kernel-dev-64dbce580d5a7e89e8de20b91f80c7267cdad91d.tar.gz
dm: export suspended state to targets
This patch adds the exported dm_suspended() function so that targets can check whether or not they are suspended. Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Cc: Mike Anderson <andmike@linux.vnet.ibm.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
-rw-r--r--drivers/md/dm.c11
-rw-r--r--include/linux/device-mapper.h1
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index e0702bf..3167480 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -2684,6 +2684,17 @@ int dm_suspended_md(struct mapped_device *md)
return test_bit(DMF_SUSPENDED, &md->flags);
}
+int dm_suspended(struct dm_target *ti)
+{
+ struct mapped_device *md = dm_table_get_md(ti->table);
+ int r = dm_suspended_md(md);
+
+ dm_put(md);
+
+ return r;
+}
+EXPORT_SYMBOL_GPL(dm_suspended);
+
int dm_noflush_suspending(struct dm_target *ti)
{
struct mapped_device *md = dm_table_get_md(ti->table);
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index fca0d31b..d4c9c0b 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -235,6 +235,7 @@ void dm_uevent_add(struct mapped_device *md, struct list_head *elist);
const char *dm_device_name(struct mapped_device *md);
int dm_copy_name_and_uuid(struct mapped_device *md, char *name, char *uuid);
struct gendisk *dm_disk(struct mapped_device *md);
+int dm_suspended(struct dm_target *ti);
int dm_noflush_suspending(struct dm_target *ti);
union map_info *dm_get_mapinfo(struct bio *bio);
union map_info *dm_get_rq_mapinfo(struct request *rq);
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