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authorWill Drewry <wad@chromium.org>2010-08-12 07:14:03 +0400
committerAlasdair G Kergon <agk@redhat.com>2010-08-12 07:14:03 +0400
commit26803b9f06d365122fae82e7554a66ef8278e0bb (patch)
tree83f77be2b09bbaa6d97105509d54955b2eec7147
parentb1d5552838334c600b068c9c8cc18638e5a8cb47 (diff)
downloadlinux-26803b9f06d365122fae82e7554a66ef8278e0bb.tar.xz
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>
-rw-r--r--drivers/md/dm-ioctl.c34
-rw-r--r--drivers/md/dm-table.c55
-rw-r--r--drivers/md/dm.h1
3 files changed, 52 insertions, 38 deletions
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index ed8585954a3a..4d4ced8e4307 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1131,28 +1131,9 @@ static int populate_table(struct dm_table *table,
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 @@ static int table_load(struct dm_ioctl *param, size_t param_size)
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 9924ea23032d..bc60ef77a0d8 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -245,7 +245,7 @@ void dm_table_destroy(struct dm_table *t)
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 @@ int dm_table_add_target(struct dm_table *t, const char *type,
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 @@ static int setup_indexes(struct dm_table *t)
/*
* 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 @@ int dm_table_complete(struct dm_table *t)
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 450fbd98c48c..0d7b374c5dc2 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -59,7 +59,6 @@ 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);
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);