dm ioctl: refactor dm_table_complete
This change unifies the various checks and finalization that occurs on a
table prior to use. By doing so, it allows table construction without
traversing the dm-ioctl interface.
Signed-off-by: Will Drewry <wad@chromium.org>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index ed85859..4d4ced8 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1131,28 +1131,9 @@
next = spec->next;
}
- r = dm_table_set_type(table);
- if (r) {
- DMWARN("unable to set table type");
- return r;
- }
-
return dm_table_complete(table);
}
-static int table_prealloc_integrity(struct dm_table *t,
- struct mapped_device *md)
-{
- struct list_head *devices = dm_table_get_devices(t);
- struct dm_dev_internal *dd;
-
- list_for_each_entry(dd, devices, list)
- if (bdev_get_integrity(dd->dm_dev.bdev))
- return blk_integrity_register(dm_disk(md), NULL);
-
- return 0;
-}
-
static int table_load(struct dm_ioctl *param, size_t param_size)
{
int r;
@@ -1174,21 +1155,6 @@
goto out;
}
- r = table_prealloc_integrity(t, md);
- if (r) {
- DMERR("%s: could not register integrity profile.",
- dm_device_name(md));
- dm_table_destroy(t);
- goto out;
- }
-
- r = dm_table_alloc_md_mempools(t);
- if (r) {
- DMWARN("unable to allocate mempools for this table");
- dm_table_destroy(t);
- goto out;
- }
-
/* Protect md->type and md->queue against concurrent table loads. */
dm_lock_md_type(md);
if (dm_get_md_type(md) == DM_TYPE_NONE)
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 9924ea2..bc60ef7 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -245,7 +245,7 @@
msleep(1);
smp_mb();
- /* free the indexes (see dm_table_complete) */
+ /* free the indexes */
if (t->depth >= 2)
vfree(t->index[t->depth - 2]);
@@ -778,7 +778,7 @@
return r;
}
-int dm_table_set_type(struct dm_table *t)
+static int dm_table_set_type(struct dm_table *t)
{
unsigned i;
unsigned bio_based = 0, request_based = 0;
@@ -900,7 +900,7 @@
/*
* Builds the btree to index the map.
*/
-int dm_table_complete(struct dm_table *t)
+static int dm_table_build_index(struct dm_table *t)
{
int r = 0;
unsigned int leaf_nodes;
@@ -919,6 +919,55 @@
return r;
}
+/*
+ * Register the mapped device for blk_integrity support if
+ * the underlying devices support it.
+ */
+static int dm_table_prealloc_integrity(struct dm_table *t, struct mapped_device *md)
+{
+ struct list_head *devices = dm_table_get_devices(t);
+ struct dm_dev_internal *dd;
+
+ list_for_each_entry(dd, devices, list)
+ if (bdev_get_integrity(dd->dm_dev.bdev))
+ return blk_integrity_register(dm_disk(md), NULL);
+
+ return 0;
+}
+
+/*
+ * Prepares the table for use by building the indices,
+ * setting the type, and allocating mempools.
+ */
+int dm_table_complete(struct dm_table *t)
+{
+ int r;
+
+ r = dm_table_set_type(t);
+ if (r) {
+ DMERR("unable to set table type");
+ return r;
+ }
+
+ r = dm_table_build_index(t);
+ if (r) {
+ DMERR("unable to build btrees");
+ return r;
+ }
+
+ r = dm_table_prealloc_integrity(t, t->md);
+ if (r) {
+ DMERR("could not register integrity profile.");
+ return r;
+ }
+
+ r = dm_table_alloc_md_mempools(t);
+ if (r)
+ DMERR("unable to allocate mempools");
+
+ return r;
+}
+
static DEFINE_MUTEX(_event_lock);
void dm_table_event_callback(struct dm_table *t,
void (*fn)(void *), void *context)
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index 450fbd9..0d7b374 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -59,7 +59,6 @@
int dm_table_resume_targets(struct dm_table *t);
int dm_table_any_congested(struct dm_table *t, int bdi_bits);
int dm_table_any_busy_target(struct dm_table *t);
-int dm_table_set_type(struct dm_table *t);
unsigned dm_table_get_type(struct dm_table *t);
bool dm_table_request_based(struct dm_table *t);
int dm_table_alloc_md_mempools(struct dm_table *t);