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Subject[PATCH v6 1/3] dm: make some mapped_device functions available
Date
From: Brian Norris <briannorris@chromium.org>

For init to build a mapped_device, it must hold the appropriate locks,
able to use dm_table_destroy() and the functions to get/set the md
type, so move these to the common header.

Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
---
v6: added more functions required
v5: first version of this specific patch in the series
---
drivers/md/dm.h | 8 --------
include/linux/device-mapper.h | 13 +++++++++++++
2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index f298b01..6b501b5 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -48,7 +48,6 @@ struct dm_md_mempools;
/*-----------------------------------------------------------------
* Internal table functions.
*---------------------------------------------------------------*/
-void dm_table_destroy(struct dm_table *t);
void dm_table_event_callback(struct dm_table *t,
void (*fn)(void *), void *context);
struct dm_target *dm_table_get_target(struct dm_table *t, unsigned int index);
@@ -64,7 +63,6 @@ void dm_table_presuspend_undo_targets(struct dm_table *t);
void dm_table_postsuspend_targets(struct dm_table *t);
int dm_table_resume_targets(struct dm_table *t);
int dm_table_any_congested(struct dm_table *t, int bdi_bits);
-unsigned dm_table_get_type(struct dm_table *t);
struct target_type *dm_table_get_immutable_target_type(struct dm_table *t);
struct dm_target *dm_table_get_immutable_target(struct dm_table *t);
struct dm_target *dm_table_get_wildcard_target(struct dm_table *t);
@@ -74,14 +72,8 @@ bool dm_table_all_blk_mq_devices(struct dm_table *t);
void dm_table_free_md_mempools(struct dm_table *t);
struct dm_md_mempools *dm_table_get_md_mempools(struct dm_table *t);

-void dm_lock_md_type(struct mapped_device *md);
-void dm_unlock_md_type(struct mapped_device *md);
-void dm_set_md_type(struct mapped_device *md, unsigned type);
-unsigned dm_get_md_type(struct mapped_device *md);
struct target_type *dm_get_immutable_target_type(struct mapped_device *md);

-int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t);
-
/*
* To check the return value from dm_table_find_target().
*/
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index b7ab76e..9f70b21 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -479,6 +479,11 @@ void dm_table_set_type(struct dm_table *t, unsigned type);
int dm_table_complete(struct dm_table *t);

/*
+ * Destroy the table when finished.
+ */
+void dm_table_destroy(struct dm_table *t);
+
+/*
* Target may require that it is never sent I/O larger than len.
*/
int __must_check dm_set_target_max_io_len(struct dm_target *ti, sector_t len);
@@ -515,6 +520,14 @@ void dm_table_run_md_queue_async(struct dm_table *t);
struct dm_table *dm_swap_table(struct mapped_device *md,
struct dm_table *t);

+unsigned dm_table_get_type(struct dm_table *t);
+
+void dm_lock_md_type(struct mapped_device *md);
+void dm_unlock_md_type(struct mapped_device *md);
+void dm_set_md_type(struct mapped_device *md, unsigned type);
+unsigned dm_get_md_type(struct mapped_device *md);
+int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t);
+
/*
* A wrapper around vmalloc.
*/
--
2.9.3
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