The patch titled
dm: add exports
has been added to the -mm tree. Its filename is
dm-add-exports-2.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: dm: add exports
From: Alasdair G Kergon <agk@xxxxxxxxxx>
Move definitions of core device-mapper functions for manipulating mapped
devices and their tables to <linux/device-mapper.h> advertising their
availability for use elsewhere in the kernel.
Protect the contents of device-mapper.h with ifdef __KERNEL__. And throw
in a few formatting clean-ups and extra comments.
Signed-off-by: Alasdair G Kergon <agk@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/md/dm.c | 12 +--
drivers/md/dm.h | 75 -----------------------
include/linux/device-mapper.h | 104 +++++++++++++++++++++++++++++++-
3 files changed, 109 insertions(+), 82 deletions(-)
diff -puN drivers/md/dm.c~dm-add-exports-2 drivers/md/dm.c
--- a/drivers/md/dm.c~dm-add-exports-2
+++ a/drivers/md/dm.c
@@ -51,9 +51,9 @@ struct target_io {
union map_info *dm_get_mapinfo(struct bio *bio)
{
- if (bio && bio->bi_private)
- return &((struct target_io *)bio->bi_private)->info;
- return NULL;
+ if (bio && bio->bi_private)
+ return &((struct target_io *)bio->bi_private)->info;
+ return NULL;
}
#define MINOR_ALLOCED ((void *)-1)
@@ -514,8 +514,8 @@ static void __map_bio(struct dm_target *
if (r > 0) {
/* the bio has been remapped so dispatch it */
- blk_add_trace_remap(bdev_get_queue(clone->bi_bdev), clone,
- tio->io->bio->bi_bdev->bd_dev, sector,
+ blk_add_trace_remap(bdev_get_queue(clone->bi_bdev), clone,
+ tio->io->bio->bi_bdev->bd_dev, sector,
clone->bi_sector);
generic_make_request(clone);
@@ -1082,7 +1082,7 @@ static struct mapped_device *dm_find_md(
md = idr_find(&_minor_idr, minor);
if (md && (md == MINOR_ALLOCED ||
(dm_disk(md)->first_minor != minor) ||
- test_bit(DMF_FREEING, &md->flags))) {
+ test_bit(DMF_FREEING, &md->flags))) {
md = NULL;
goto out;
}
diff -puN drivers/md/dm.h~dm-add-exports-2 drivers/md/dm.h
--- a/drivers/md/dm.h~dm-add-exports-2
+++ a/drivers/md/dm.h
@@ -39,88 +39,16 @@ struct dm_dev {
};
struct dm_table;
-struct mapped_device;
/*-----------------------------------------------------------------
- * Functions for manipulating a struct mapped_device.
- * Drop the reference with dm_put when you finish with the object.
+ * Internal table functions.
*---------------------------------------------------------------*/
-
-/*
- * DM_ANY_MINOR allocates any available minor number.
- */
-#define DM_ANY_MINOR (-1)
-int dm_create(int minor, struct mapped_device **md);
-
-void dm_set_mdptr(struct mapped_device *md, void *ptr);
-void *dm_get_mdptr(struct mapped_device *md);
-
-/*
- * Reference counting for md.
- */
-void dm_get(struct mapped_device *md);
-struct mapped_device *dm_get_md(dev_t dev);
-void dm_put(struct mapped_device *md);
-
-/*
- * A device can still be used while suspended, but I/O is deferred.
- */
-int dm_suspend(struct mapped_device *md, int with_lockfs);
-int dm_resume(struct mapped_device *md);
-
-/*
- * The device must be suspended before calling this method.
- */
-int dm_swap_table(struct mapped_device *md, struct dm_table *t);
-
-/*
- * Drop a reference on the table when you've finished with the
- * result.
- */
-struct dm_table *dm_get_table(struct mapped_device *md);
-
-/*
- * Event functions.
- */
-uint32_t dm_get_event_nr(struct mapped_device *md);
-int dm_wait_event(struct mapped_device *md, int event_nr);
-
-/*
- * Info functions.
- */
-struct gendisk *dm_disk(struct mapped_device *md);
-int dm_suspended(struct mapped_device *md);
-
-/*
- * Geometry functions.
- */
-int dm_get_geometry(struct mapped_device *md, struct hd_geometry *geo);
-int dm_set_geometry(struct mapped_device *md, struct hd_geometry *geo);
-
-/*-----------------------------------------------------------------
- * Functions for manipulating a table. Tables are also reference
- * counted.
- *---------------------------------------------------------------*/
-int dm_table_create(struct dm_table **result, int mode,
- unsigned num_targets, struct mapped_device *md);
-
-void dm_table_get(struct dm_table *t);
-void dm_table_put(struct dm_table *t);
-
-int dm_table_add_target(struct dm_table *t, const char *type,
- sector_t start, sector_t len, char *params);
-int dm_table_complete(struct dm_table *t);
void dm_table_event_callback(struct dm_table *t,
void (*fn)(void *), void *context);
-void dm_table_event(struct dm_table *t);
-sector_t dm_table_get_size(struct dm_table *t);
struct dm_target *dm_table_get_target(struct dm_table *t, unsigned int index);
struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector);
void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q);
-unsigned int dm_table_get_num_targets(struct dm_table *t);
struct list_head *dm_table_get_devices(struct dm_table *t);
-int dm_table_get_mode(struct dm_table *t);
-struct mapped_device *dm_table_get_md(struct dm_table *t);
void dm_table_presuspend_targets(struct dm_table *t);
void dm_table_postsuspend_targets(struct dm_table *t);
void dm_table_resume_targets(struct dm_table *t);
@@ -138,7 +66,6 @@ void dm_put_target_type(struct target_ty
int dm_target_iterate(void (*iter_func)(struct target_type *tt,
void *param), void *param);
-
/*-----------------------------------------------------------------
* Useful inlines.
*---------------------------------------------------------------*/
diff -puN include/linux/device-mapper.h~dm-add-exports-2 include/linux/device-mapper.h
--- a/include/linux/device-mapper.h~dm-add-exports-2
+++ a/include/linux/device-mapper.h
@@ -8,9 +8,12 @@
#ifndef _LINUX_DEVICE_MAPPER_H
#define _LINUX_DEVICE_MAPPER_H
+#ifdef __KERNEL__
+
struct dm_target;
struct dm_table;
struct dm_dev;
+struct mapped_device;
typedef enum { STATUSTYPE_INFO, STATUSTYPE_TABLE } status_type_t;
@@ -82,7 +85,7 @@ void dm_put_device(struct dm_target *ti,
struct target_type {
const char *name;
struct module *module;
- unsigned version[3];
+ unsigned version[3];
dm_ctr_fn ctr;
dm_dtr_fn dtr;
dm_map_fn map;
@@ -133,4 +136,101 @@ struct dm_target {
int dm_register_target(struct target_type *t);
int dm_unregister_target(struct target_type *t);
-#endif /* _LINUX_DEVICE_MAPPER_H */
+
+/*-----------------------------------------------------------------
+ * Functions for creating and manipulating mapped devices.
+ * Drop the reference with dm_put when you finish with the object.
+ *---------------------------------------------------------------*/
+
+/*
+ * DM_ANY_MINOR chooses the next available minor number.
+ */
+#define DM_ANY_MINOR (-1)
+int dm_create(int minor, struct mapped_device **md);
+
+/*
+ * Reference counting for md.
+ */
+struct mapped_device *dm_get_md(dev_t dev);
+void dm_get(struct mapped_device *md);
+void dm_put(struct mapped_device *md);
+
+/*
+ * An arbitrary pointer may be stored alongside a mapped device.
+ */
+void dm_set_mdptr(struct mapped_device *md, void *ptr);
+void *dm_get_mdptr(struct mapped_device *md);
+
+/*
+ * A device can still be used while suspended, but I/O is deferred.
+ */
+int dm_suspend(struct mapped_device *md, int with_lockfs);
+int dm_resume(struct mapped_device *md);
+
+/*
+ * Event functions.
+ */
+uint32_t dm_get_event_nr(struct mapped_device *md);
+int dm_wait_event(struct mapped_device *md, int event_nr);
+
+/*
+ * Info functions.
+ */
+struct gendisk *dm_disk(struct mapped_device *md);
+int dm_suspended(struct mapped_device *md);
+
+/*
+ * Geometry functions.
+ */
+int dm_get_geometry(struct mapped_device *md, struct hd_geometry *geo);
+int dm_set_geometry(struct mapped_device *md, struct hd_geometry *geo);
+
+
+/*-----------------------------------------------------------------
+ * Functions for manipulating device-mapper tables.
+ *---------------------------------------------------------------*/
+
+/*
+ * First create an empty table.
+ */
+int dm_table_create(struct dm_table **result, int mode,
+ unsigned num_targets, struct mapped_device *md);
+
+/*
+ * Then call this once for each target.
+ */
+int dm_table_add_target(struct dm_table *t, const char *type,
+ sector_t start, sector_t len, char *params);
+
+/*
+ * Finally call this to make the table ready for use.
+ */
+int dm_table_complete(struct dm_table *t);
+
+/*
+ * Table reference counting.
+ */
+struct dm_table *dm_get_table(struct mapped_device *md);
+void dm_table_get(struct dm_table *t);
+void dm_table_put(struct dm_table *t);
+
+/*
+ * Queries
+ */
+sector_t dm_table_get_size(struct dm_table *t);
+unsigned int dm_table_get_num_targets(struct dm_table *t);
+int dm_table_get_mode(struct dm_table *t);
+struct mapped_device *dm_table_get_md(struct dm_table *t);
+
+/*
+ * Trigger an event.
+ */
+void dm_table_event(struct dm_table *t);
+
+/*
+ * The device must be suspended before calling this method.
+ */
+int dm_swap_table(struct mapped_device *md, struct dm_table *t);
+
+#endif /* __KERNEL__ */
+#endif /* _LINUX_DEVICE_MAPPER_H */
_
Patches currently in -mm which might be from agk@xxxxxxxxxx are
git-hdrinstall2.patch
dm-snapshot-unify-chunk_size.patch
lib-add-idr_replace.patch
lib-add-idr_replace-tidy.patch
dm-fix-idr-minor-allocation.patch
dm-move-idr_pre_get.patch
dm-change-minor_lock-to-spinlock.patch
dm-add-dmf_freeing.patch
dm-fix-mapped-device-ref-counting.patch
dm-add-module-ref-counting.patch
dm-fix-block-device-initialisation.patch
dm-mirror-sector-offset-fix.patch
dm-table-get_target-fix-last-index.patch
dm-support-ioctls-on-mapped-devices.patch
dm-linear-support-ioctls.patch
dm-mpath-support-ioctls.patch
dm-export-blkdev_driver_ioctl.patch
dm-mirror-log-sector-size-fix.patch
dm-mirror-log-refactor-context.patch
dm-mirror-log-bitset_size-fix.patch
dm-mirror-log-sync_count-fix.patch
dm-kcopyd-error-accumulation-fix.patch
dm-table-split_args-handle-no-input.patch
dm-consolidate-creation-functions.patch
dm-add-exports-2.patch
dm-create-error-table.patch
dm-prevent-removal-if-open.patch
dm-improve-error-message-consistency.patch
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
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