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authorMikulas Patocka <mpatocka@redhat.com>2009-12-10 23:52:01 +0000
committerAlasdair G Kergon <agk@redhat.com>2009-12-10 23:52:01 +0000
commit87a8f240e9bcf025ba45e4563c842b0d59c5e8ef (patch)
treeb6b42a74fc1135c11656d8cf4bf5ea4005c74a77
parent5adc78d0d231b030405b31759f125f13404fdb64 (diff)
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dm log: add flush callback fn
Introduce a callback pointer from the log to dm-raid1 layer. Before some region is set as "in-sync", we need to flush hardware cache on all the disks. But the log module doesn't have access to the mirror_set structure. So it will use this callback. So far the callback is unused, it will be used in further patches. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
-rw-r--r--drivers/md/dm-log.c6
-rw-r--r--drivers/md/dm-raid1.c2
-rw-r--r--include/linux/dm-dirty-log.h6
3 files changed, 9 insertions, 5 deletions
diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c
index d779f8c915d..666a80e3602 100644
--- a/drivers/md/dm-log.c
+++ b/drivers/md/dm-log.c
@@ -145,8 +145,9 @@ int dm_dirty_log_type_unregister(struct dm_dirty_log_type *type)
EXPORT_SYMBOL(dm_dirty_log_type_unregister);
struct dm_dirty_log *dm_dirty_log_create(const char *type_name,
- struct dm_target *ti,
- unsigned int argc, char **argv)
+ struct dm_target *ti,
+ int (*flush_callback_fn)(struct dm_target *ti),
+ unsigned int argc, char **argv)
{
struct dm_dirty_log_type *type;
struct dm_dirty_log *log;
@@ -161,6 +162,7 @@ struct dm_dirty_log *dm_dirty_log_create(const char *type_name,
return NULL;
}
+ log->flush_callback_fn = flush_callback_fn;
log->type = type;
if (type->ctr(log, ti, argc, argv)) {
kfree(log);
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index 752a29e1855..d44bc497dad 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -896,7 +896,7 @@ static struct dm_dirty_log *create_dirty_log(struct dm_target *ti,
return NULL;
}
- dl = dm_dirty_log_create(argv[0], ti, param_count, argv + 2);
+ dl = dm_dirty_log_create(argv[0], ti, NULL, param_count, argv + 2);
if (!dl) {
ti->error = "Error creating mirror dirty log";
return NULL;
diff --git a/include/linux/dm-dirty-log.h b/include/linux/dm-dirty-log.h
index 5e8b11d88f6..7084503c340 100644
--- a/include/linux/dm-dirty-log.h
+++ b/include/linux/dm-dirty-log.h
@@ -21,6 +21,7 @@ struct dm_dirty_log_type;
struct dm_dirty_log {
struct dm_dirty_log_type *type;
+ int (*flush_callback_fn)(struct dm_target *ti);
void *context;
};
@@ -136,8 +137,9 @@ int dm_dirty_log_type_unregister(struct dm_dirty_log_type *type);
* type->constructor/destructor() directly.
*/
struct dm_dirty_log *dm_dirty_log_create(const char *type_name,
- struct dm_target *ti,
- unsigned argc, char **argv);
+ struct dm_target *ti,
+ int (*flush_callback_fn)(struct dm_target *ti),
+ unsigned argc, char **argv);
void dm_dirty_log_destroy(struct dm_dirty_log *log);
#endif /* __KERNEL__ */