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Enable cache detach

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Signed-off-by: Michal Mielewczyk <michal.mielewczyk@huawei.com>
Signed-off-by: Jan Musial <jan.musial@huawei.com>
This commit is contained in:
Michal Mielewczyk
2023-08-23 08:16:51 +02:00
committed by Rafal Stefanowski
parent af8c75b20a
commit 16690e1eab
7 changed files with 161 additions and 1 deletions
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63
modules/cas_cache/layer_cache_management.c
View File

@@ -2509,6 +2509,22 @@ int cache_mngt_create_cache_standby_activate_cfg(
return 0;
}
static void _cache_mngt_detach_cache_complete(ocf_cache_t cache, void *priv,
int error)
{
struct _cache_mngt_async_context *context = priv;
int result;
result = _cache_mngt_async_callee_set_result(context, error);
if (result != -KCAS_ERR_WAITING_INTERRUPTED)
return;
kfree(context);
ocf_mngt_cache_unlock(cache);
kfree(context);
}
int cache_mngt_attach_device(const char *cache_name, size_t name_len,
const char *device, struct ocf_mngt_cache_attach_config *attach_cfg)
{
@@ -3113,6 +3129,53 @@ put:
return result;
}
int cache_mngt_detach_cache(const char *cache_name, size_t name_len)
{
ocf_cache_t cache;
int status = 0;
struct _cache_mngt_async_context *context;
context = kmalloc(sizeof(*context), GFP_KERNEL);
if (!context)
return -ENOMEM;
_cache_mngt_async_context_init(context);
status = ocf_mngt_cache_get_by_name(cas_ctx, cache_name,
name_len, &cache);
if (status)
goto err_get_cache;
if (ocf_cache_is_running(cache))
status = _cache_flush_with_lock(cache);
if (status)
goto err_flush;
status = _cache_mngt_lock_sync(cache);
if (status)
goto err_lock;
ocf_mngt_cache_detach(cache, _cache_mngt_detach_cache_complete, context);
status = wait_for_completion_interruptible(&context->cmpl);
status = _cache_mngt_async_caller_set_result(context, status);
if (status == -KCAS_ERR_WAITING_INTERRUPTED) {
printk(KERN_WARNING "Waiting for cache detach interrupted. "
"The operation will finish asynchronously.\n");
goto err_int;
}
ocf_mngt_cache_unlock(cache);
err_lock:
err_flush:
ocf_mngt_cache_put(cache);
err_get_cache:
kfree(context);
err_int:
return status;
}
/**
* @brief routine implements --stop-cache command.
* @param[in] cache_name caching device name to be removed

2
modules/cas_cache/layer_cache_management.h
View File

@@ -43,6 +43,8 @@ int cache_mngt_reset_stats(const char *cache_name, size_t cache_name_len,
int cache_mngt_set_partitions(const char *cache_name, size_t name_len,
struct kcas_io_classes *cfg);
int cache_mngt_detach_cache(const char *cache_name, size_t name_len);
int cache_mngt_attach_device(const char *cache_name, size_t name_len,
const char *device, struct ocf_mngt_cache_attach_config *attach_cfg);

14
modules/cas_cache/service_ui_ioctl.c
View File

@@ -99,6 +99,20 @@ long cas_service_ioctl_ctrl(struct file *filp, unsigned int cmd,
RETURN_CMD_RESULT(cmd_info, arg, retval);
}
case KCAS_IOCTL_DETACH_CACHE: {
struct kcas_stop_cache *cmd_info;
char cache_name[OCF_CACHE_NAME_SIZE];
GET_CMD_INFO(cmd_info, arg);
cache_name_from_id(cache_name, cmd_info->cache_id);
retval = cache_mngt_detach_cache(cache_name,
OCF_CACHE_NAME_SIZE);
RETURN_CMD_RESULT(cmd_info, arg, retval);
}
case KCAS_IOCTL_SET_CACHE_STATE: {
struct kcas_set_cache_state *cmd_info;
char cache_name[OCF_CACHE_NAME_SIZE];