aboutsummaryrefslogtreecommitdiff
path: root/drivers/md
diff options
context:
space:
mode:
authorMike Snitzer <snitzer@redhat.com>2019-04-15 16:54:36 -0400
committerMike Snitzer <snitzer@redhat.com>2019-04-18 16:18:34 -0400
commit6a1b1ddc6a2cfb32da8f5e75f1aa053280682a05 (patch)
tree08005833068a4d559a2aea6c20d19ea18ee84dbe /drivers/md
parenta1ed4d9e937678d15990694c32e1d104e54e97a3 (diff)
downloadlinux-6a1b1ddc6a2cfb32da8f5e75f1aa053280682a05.tar.gz
dm thin metadata: add wrappers for managing write locking of metadata
No functional change, but this prepares to hook off of pmd_write_lock() with additional functionality (as provided in next commit). Suggested-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-thin-metadata.c108
1 files changed, 64 insertions, 44 deletions
diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index 7381e477a945..fd63485b27e9 100644
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -367,6 +367,26 @@ static int subtree_equal(void *context, const void *value1_le, const void *value
/*----------------------------------------------------------------*/
+static inline void __pmd_write_lock(struct dm_pool_metadata *pmd)
+ __acquires(pmd->root_lock)
+{
+ down_write(&pmd->root_lock);
+}
+#define pmd_write_lock_in_core(pmd) __pmd_write_lock((pmd))
+
+static inline void pmd_write_lock(struct dm_pool_metadata *pmd)
+{
+ __pmd_write_lock(pmd);
+}
+
+static inline void pmd_write_unlock(struct dm_pool_metadata *pmd)
+ __releases(pmd->root_lock)
+{
+ up_write(&pmd->root_lock);
+}
+
+/*----------------------------------------------------------------*/
+
static int superblock_lock_zero(struct dm_pool_metadata *pmd,
struct dm_block **sblock)
{
@@ -1032,10 +1052,10 @@ int dm_pool_create_thin(struct dm_pool_metadata *pmd, dm_thin_id dev)
{
int r = -EINVAL;
- down_write(&pmd->root_lock);
+ pmd_write_lock(pmd);
if (!pmd->fail_io)
r = __create_thin(pmd, dev);
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
@@ -1123,10 +1143,10 @@ int dm_pool_create_snap(struct dm_pool_metadata *pmd,
{
int r = -EINVAL;
- down_write(&pmd->root_lock);
+ pmd_write_lock(pmd);
if (!pmd->fail_io)
r = __create_snap(pmd, dev, origin);
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
@@ -1166,10 +1186,10 @@ int dm_pool_delete_thin_device(struct dm_pool_metadata *pmd,
{
int r = -EINVAL;
- down_write(&pmd->root_lock);
+ pmd_write_lock(pmd);
if (!pmd->fail_io)
r = __delete_device(pmd, dev);
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
@@ -1180,7 +1200,7 @@ int dm_pool_set_metadata_transaction_id(struct dm_pool_metadata *pmd,
{
int r = -EINVAL;
- down_write(&pmd->root_lock);
+ pmd_write_lock(pmd);
if (pmd->fail_io)
goto out;
@@ -1194,7 +1214,7 @@ int dm_pool_set_metadata_transaction_id(struct dm_pool_metadata *pmd,
r = 0;
out:
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
@@ -1288,10 +1308,10 @@ int dm_pool_reserve_metadata_snap(struct dm_pool_metadata *pmd)
{
int r = -EINVAL;
- down_write(&pmd->root_lock);
+ pmd_write_lock(pmd);
if (!pmd->fail_io)
r = __reserve_metadata_snap(pmd);
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
@@ -1336,10 +1356,10 @@ int dm_pool_release_metadata_snap(struct dm_pool_metadata *pmd)
{
int r = -EINVAL;
- down_write(&pmd->root_lock);
+ pmd_write_lock(pmd);
if (!pmd->fail_io)
r = __release_metadata_snap(pmd);
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
@@ -1382,19 +1402,19 @@ int dm_pool_open_thin_device(struct dm_pool_metadata *pmd, dm_thin_id dev,
{
int r = -EINVAL;
- down_write(&pmd->root_lock);
+ pmd_write_lock_in_core(pmd);
if (!pmd->fail_io)
r = __open_device(pmd, dev, 0, td);
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
int dm_pool_close_thin_device(struct dm_thin_device *td)
{
- down_write(&td->pmd->root_lock);
+ pmd_write_lock_in_core(td->pmd);
__close_device(td);
- up_write(&td->pmd->root_lock);
+ pmd_write_unlock(td->pmd);
return 0;
}
@@ -1575,10 +1595,10 @@ int dm_thin_insert_block(struct dm_thin_device *td, dm_block_t block,
{
int r = -EINVAL;
- down_write(&td->pmd->root_lock);
+ pmd_write_lock(td->pmd);
if (!td->pmd->fail_io)
r = __insert(td, block, data_block);
- up_write(&td->pmd->root_lock);
+ pmd_write_unlock(td->pmd);
return r;
}
@@ -1662,10 +1682,10 @@ int dm_thin_remove_block(struct dm_thin_device *td, dm_block_t block)
{
int r = -EINVAL;
- down_write(&td->pmd->root_lock);
+ pmd_write_lock(td->pmd);
if (!td->pmd->fail_io)
r = __remove(td, block);
- up_write(&td->pmd->root_lock);
+ pmd_write_unlock(td->pmd);
return r;
}
@@ -1675,10 +1695,10 @@ int dm_thin_remove_range(struct dm_thin_device *td,
{
int r = -EINVAL;
- down_write(&td->pmd->root_lock);
+ pmd_write_lock(td->pmd);
if (!td->pmd->fail_io)
r = __remove_range(td, begin, end);
- up_write(&td->pmd->root_lock);
+ pmd_write_unlock(td->pmd);
return r;
}
@@ -1701,13 +1721,13 @@ int dm_pool_inc_data_range(struct dm_pool_metadata *pmd, dm_block_t b, dm_block_
{
int r = 0;
- down_write(&pmd->root_lock);
+ pmd_write_lock(pmd);
for (; b != e; b++) {
r = dm_sm_inc_block(pmd->data_sm, b);
if (r)
break;
}
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
@@ -1716,13 +1736,13 @@ int dm_pool_dec_data_range(struct dm_pool_metadata *pmd, dm_block_t b, dm_block_
{
int r = 0;
- down_write(&pmd->root_lock);
+ pmd_write_lock(pmd);
for (; b != e; b++) {
r = dm_sm_dec_block(pmd->data_sm, b);
if (r)
break;
}
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
@@ -1770,10 +1790,10 @@ int dm_pool_alloc_data_block(struct dm_pool_metadata *pmd, dm_block_t *result)
{
int r = -EINVAL;
- down_write(&pmd->root_lock);
+ pmd_write_lock(pmd);
if (!pmd->fail_io)
r = dm_sm_new_block(pmd->data_sm, result);
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
@@ -1782,7 +1802,7 @@ int dm_pool_commit_metadata(struct dm_pool_metadata *pmd)
{
int r = -EINVAL;
- down_write(&pmd->root_lock);
+ pmd_write_lock(pmd);
if (pmd->fail_io)
goto out;
@@ -1795,7 +1815,7 @@ int dm_pool_commit_metadata(struct dm_pool_metadata *pmd)
*/
r = __begin_transaction(pmd);
out:
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
@@ -1811,7 +1831,7 @@ int dm_pool_abort_metadata(struct dm_pool_metadata *pmd)
{
int r = -EINVAL;
- down_write(&pmd->root_lock);
+ pmd_write_lock(pmd);
if (pmd->fail_io)
goto out;
@@ -1822,7 +1842,7 @@ int dm_pool_abort_metadata(struct dm_pool_metadata *pmd)
pmd->fail_io = true;
out:
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
@@ -1953,10 +1973,10 @@ int dm_pool_resize_data_dev(struct dm_pool_metadata *pmd, dm_block_t new_count)
{
int r = -EINVAL;
- down_write(&pmd->root_lock);
+ pmd_write_lock(pmd);
if (!pmd->fail_io)
r = __resize_space_map(pmd->data_sm, new_count);
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
@@ -1965,29 +1985,29 @@ int dm_pool_resize_metadata_dev(struct dm_pool_metadata *pmd, dm_block_t new_cou
{
int r = -EINVAL;
- down_write(&pmd->root_lock);
+ pmd_write_lock(pmd);
if (!pmd->fail_io) {
r = __resize_space_map(pmd->metadata_sm, new_count);
if (!r)
__set_metadata_reserve(pmd);
}
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
void dm_pool_metadata_read_only(struct dm_pool_metadata *pmd)
{
- down_write(&pmd->root_lock);
+ pmd_write_lock_in_core(pmd);
dm_bm_set_read_only(pmd->bm);
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
}
void dm_pool_metadata_read_write(struct dm_pool_metadata *pmd)
{
- down_write(&pmd->root_lock);
+ pmd_write_lock_in_core(pmd);
dm_bm_set_read_write(pmd->bm);
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
}
int dm_pool_register_metadata_threshold(struct dm_pool_metadata *pmd,
@@ -1997,9 +2017,9 @@ int dm_pool_register_metadata_threshold(struct dm_pool_metadata *pmd,
{
int r;
- down_write(&pmd->root_lock);
+ pmd_write_lock_in_core(pmd);
r = dm_sm_register_threshold_callback(pmd->metadata_sm, threshold, fn, context);
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}
@@ -2010,7 +2030,7 @@ int dm_pool_metadata_set_needs_check(struct dm_pool_metadata *pmd)
struct dm_block *sblock;
struct thin_disk_superblock *disk_super;
- down_write(&pmd->root_lock);
+ pmd_write_lock(pmd);
pmd->flags |= THIN_METADATA_NEEDS_CHECK_FLAG;
r = superblock_lock(pmd, &sblock);
@@ -2024,7 +2044,7 @@ int dm_pool_metadata_set_needs_check(struct dm_pool_metadata *pmd)
dm_bm_unlock(sblock);
out:
- up_write(&pmd->root_lock);
+ pmd_write_unlock(pmd);
return r;
}