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dm: export suspended state to targets

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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>
This commit is contained in:
Kiyoshi Ueda 2009-12-10 23:52:27 +00:00 committed by Alasdair G Kergon
parent 4f186f8bbf
commit 64dbce580d
2 changed files with 12 additions and 0 deletions
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11
drivers/md/dm.c
View file

@ -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);

1
include/linux/device-mapper.h
View file

@ -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);