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Move querying for atomic device params before cache start

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This needs to be done in caller application context. As part of asynchronous
management API rework, volume_open callback was moved to kernel worker thread
context. To work around this, atomic parameters are now read before cache
attach/load/probe and provided to bottom volume via volume params.

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
This commit is contained in:
Adam Rutkowski
2019-04-01 17:23:34 -04:00
parent 21abb82081
commit 9670adf751
8 changed files with 37 additions and 23 deletions
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9
modules/cas_cache/layer_cache_management.c
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@@ -905,10 +905,10 @@ static int cache_mng_initialize_core_objects(ocf_cache_t cache)
int cache_mng_prepare_cache_cfg(struct ocf_mngt_cache_config *cfg,
struct ocf_mngt_cache_device_config *device_cfg,
struct atomic_dev_params *atomic_params,
struct kcas_start_cache *cmd)
{
int init_cache, result;
struct atomic_dev_params atomic_params = { 0 };
struct block_device *bdev;
int part_count;
char holder[] = "CAS START\n";
@@ -965,12 +965,15 @@ int cache_mng_prepare_cache_cfg(struct ocf_mngt_cache_config *cfg,
return -KCAS_ERR_CONTAINS_PART;
result = cas_blk_identify_type_atomic(device_cfg->uuid.data,
&device_cfg->volume_type, &atomic_params);
&device_cfg->volume_type, atomic_params);
if (result)
return result;
if (device_cfg->volume_type == ATOMIC_DEVICE_VOLUME)
device_cfg->volume_params = atomic_params;
cmd->metadata_mode_optimal =
block_dev_is_metadata_mode_optimal(&atomic_params,
block_dev_is_metadata_mode_optimal(atomic_params,
device_cfg->volume_type);
return 0;