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Introduce cache bind operation

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Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>
This commit is contained in:
Robert Baldyga
2021-08-19 12:31:35 +02:00
parent c0110a4d01
commit 17aa424319
6 changed files with 120 additions and 47 deletions
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144
modules/cas_cache/layer_cache_management.c
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@@ -576,7 +576,8 @@ static int exit_instance_finish(void *data)
else
result = ctx->error;
cas_cls_deinit(ctx->cache);
if (!ocf_cache_is_passive(ctx->cache))
cas_cls_deinit(ctx->cache);
vfree(cache_priv);
@@ -1382,19 +1383,6 @@ error_affter_lock:
return result;
}
static int _cache_mngt_create_exported_object(ocf_core_t core, void *cntx)
{
int result;
result = kcas_core_create_exported_object(core);
if (result)
return result;
result = kcas_core_activate_exported_object(core);
return result;
}
static int _cache_mngt_remove_core_flush(ocf_cache_t cache,
struct kcas_remove_core *cmd)
{
@@ -1726,7 +1714,20 @@ out_get:
return result;
}
static int _cache_mngt_destroy_exported_object(ocf_core_t core, void *cntx)
static int _cache_mngt_create_core_exp_obj(ocf_core_t core, void *cntx)
{
int result;
result = kcas_core_create_exported_object(core);
if (result)
return result;
result = kcas_core_activate_exported_object(core);
return result;
}
static int _cache_mngt_destroy_core_exp_obj(ocf_core_t core, void *cntx)
{
if (kcas_core_destroy_exported_object(core)) {
ocf_cache_t cache = ocf_core_get_cache(core);
@@ -1739,21 +1740,46 @@ static int _cache_mngt_destroy_exported_object(ocf_core_t core, void *cntx)
return 0;
}
static int cache_mngt_initialize_core_objects(ocf_cache_t cache)
static int cache_mngt_initialize_core_exported_objects(ocf_cache_t cache)
{
int result;
result = ocf_core_visit(cache, _cache_mngt_create_exported_object, NULL,
result = ocf_core_visit(cache, _cache_mngt_create_core_exp_obj, NULL,
true);
if (result) {
/* Need to cleanup */
ocf_core_visit(cache, _cache_mngt_destroy_exported_object, NULL,
ocf_core_visit(cache, _cache_mngt_destroy_core_exp_obj, NULL,
true);
}
return result;
}
static void cache_mngt_destroy_cache_exp_obj(ocf_cache_t cache)
{
if (kcas_cache_destroy_exported_object(cache)) {
printk(KERN_ERR "Cannot destroy %s exported object\n",
ocf_cache_get_name(cache));
}
}
static int cache_mngt_initialize_cache_exported_object(ocf_cache_t cache)
{
int result;
result = kcas_cache_create_exported_object(cache);
if (result)
return result;
result = kcas_cache_activate_exported_object(cache);
if (result) {
cache_mngt_destroy_cache_exp_obj(cache);
return result;
}
return 0;
}
int cache_mngt_prepare_cache_cfg(struct ocf_mngt_cache_config *cfg,
struct ocf_mngt_cache_device_config *device_cfg,
struct kcas_start_cache *cmd)
@@ -1812,6 +1838,7 @@ int cache_mngt_prepare_cache_cfg(struct ocf_mngt_cache_config *cfg,
case CACHE_INIT_LOAD:
device_cfg->open_cores = true;
case CACHE_INIT_NEW:
case CACHE_INIT_BIND:
break;
default:
return -OCF_ERR_INVAL;
@@ -2042,7 +2069,8 @@ out_bdev:
return result;
}
static int _cache_start_finalize(ocf_cache_t cache)
static int _cache_start_finalize(ocf_cache_t cache,
struct kcas_start_cache *cmd)
{
struct cache_priv *cache_priv = ocf_cache_get_priv(cache);
struct _cache_mngt_attach_context *ctx = cache_priv->attach_context;
@@ -2050,21 +2078,37 @@ static int _cache_start_finalize(ocf_cache_t cache)
_cache_mngt_log_cache_device_path(cache, ctx->device_cfg);
result = cas_cls_init(cache);
if (result) {
ctx->ocf_start_error = result;
return result;
}
ctx->cls_inited = true;
result = cache_mngt_initialize_core_objects(cache);
if (result) {
ctx->ocf_start_error = result;
return result;
if (cmd->init_cache != CACHE_INIT_BIND) {
result = cas_cls_init(cache);
if (result) {
ctx->ocf_start_error = result;
return result;
}
ctx->cls_inited = true;
}
ocf_core_visit(cache, _cache_mngt_core_device_loaded_visitor,
NULL, false);
switch(cmd->init_cache) {
case CACHE_INIT_LOAD:
result = cache_mngt_initialize_core_exported_objects(cache);
if (result) {
ctx->ocf_start_error = result;
return result;
}
ocf_core_visit(cache, _cache_mngt_core_device_loaded_visitor,
NULL, false);
break;
case CACHE_INIT_BIND:
result = cache_mngt_initialize_cache_exported_object(cache);
if (result) {
ctx->ocf_start_error = result;
return result;
}
break;
case CACHE_INIT_NEW:
break;
default:
BUG();
}
init_instance_complete(ctx, cache);
@@ -2079,12 +2123,11 @@ int cache_mngt_init_instance(struct ocf_mngt_cache_config *cfg,
ocf_cache_t cache;
struct cache_priv *cache_priv;
int result = 0, rollback_result = 0;
bool load = (cmd && cmd->init_cache == CACHE_INIT_LOAD);
if (!try_module_get(THIS_MODULE))
return -KCAS_ERR_SYSTEM;
if (load)
if (cmd->init_cache == CACHE_INIT_LOAD)
result = _cache_mngt_check_metadata(cfg, cmd->cache_path_name);
if (result) {
module_put(THIS_MODULE);
@@ -2134,12 +2177,22 @@ int cache_mngt_init_instance(struct ocf_mngt_cache_config *cfg,
cache_priv = ocf_cache_get_priv(cache);
cache_priv->attach_context = context;
if (load) {
ocf_mngt_cache_load(cache, device_cfg,
_cache_mngt_start_complete, context);
} else {
switch (cmd->init_cache) {
case CACHE_INIT_NEW:
ocf_mngt_cache_attach(cache, device_cfg,
_cache_mngt_start_complete, context);
break;
case CACHE_INIT_LOAD:
ocf_mngt_cache_load(cache, device_cfg,
_cache_mngt_start_complete, context);
break;
case CACHE_INIT_BIND:
ocf_mngt_cache_bind(cache, device_cfg,
_cache_mngt_start_complete, context);
break;
default:
result = -OCF_ERR_INVAL;
goto err;
}
result = wait_for_completion_interruptible(&context->async.cmpl);
@@ -2150,7 +2203,7 @@ int cache_mngt_init_instance(struct ocf_mngt_cache_config *cfg,
if (result)
goto err;
result = _cache_start_finalize(cache);
result = _cache_start_finalize(cache, cmd);
if (result)
goto err;
@@ -2474,7 +2527,7 @@ int cache_mngt_exit_instance(const char *cache_name, size_t name_len, int flush)
* this time, so we need to flush cache again after disabling
* exported object. The second flush should be much faster.
*/
if (flush)
if (flush && ocf_cache_is_running(cache))
status = _cache_flush_with_lock(cache);
if (status)
goto put;
@@ -2494,16 +2547,21 @@ int cache_mngt_exit_instance(const char *cache_name, size_t name_len, int flush)
status = kcas_cache_destroy_all_core_exported_objects(cache);
if (status != 0) {
printk(KERN_WARNING
"Failed to remove all cached devices\n");
"Failed to remove all cached devices\n");
goto stop_thread;
}
status = kcas_cache_destroy_exported_object(cache);
if (status != 0) {
printk(KERN_WARNING
"Failed to remove cache exported object\n");
goto stop_thread;
}
/* Flush cache again. This time we don't allow interruption. */
if (flush)
if (flush && ocf_cache_is_running(cache))
flush_status = _cache_mngt_cache_flush_uninterruptible(cache);
context->flush_status = flush_status;
if (flush && !flush_status)
BUG_ON(ocf_mngt_cache_is_dirty(cache));