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Properly handle flush error in cache stop

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In case of initial flush error stop is aborted. In case
of failure during the second flush, appropriate error
message is presetned to the user.

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
This commit is contained in:
Adam Rutkowski 2021-04-15 14:01:35 -05:00
parent 3f348cf5d8
commit da0dda2dbd
1 changed files with 13 additions and 15 deletions
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28
modules/cas_cache/layer_cache_management.c
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@ -466,6 +466,7 @@ static int _cache_mngt_core_flush_uninterruptible(ocf_core_t core)
struct _cache_mngt_stop_context {
struct _cache_mngt_async_context async;
int error;
int flush_status;
ocf_cache_t cache;
struct task_struct *finish_thread;
};
@ -484,21 +485,21 @@ static int exit_instance_finish(void *data)
struct cache_priv *cache_priv;
struct _cache_mngt_stop_context *ctx = data;
ocf_queue_t mngt_queue;
bool flush_status;
int result = 0;
if (kthread_should_stop())
return 0;
flush_status = ocf_mngt_cache_is_dirty(ctx->cache);
cache_priv = ocf_cache_get_priv(ctx->cache);
mngt_queue = cache_priv->mngt_queue;
if (ctx->error && ctx->error != -OCF_ERR_WRITE_CACHE)
BUG_ON(ctx->error);
if (!ctx->error && flush_status)
if (!ctx->error && ctx->flush_status)
result = -KCAS_ERR_STOPPED_DIRTY;
else
result = ctx->error;
cas_cls_deinit(ctx->cache);
@ -2411,15 +2412,8 @@ int cache_mngt_exit_instance(const char *cache_name, size_t name_len, int flush)
*/
if (flush)
status = _cache_flush_with_lock(cache);
switch (status) {
case -OCF_ERR_CACHE_IN_INCOMPLETE_STATE:
case -OCF_ERR_FLUSHING_INTERRUPTED:
case -KCAS_ERR_WAITING_INTERRUPTED:
if (status)
goto put;
default:
flush_status = status;
break;
}
status = _cache_mngt_lock_sync(cache);
if (status)
@ -2441,10 +2435,6 @@ int cache_mngt_exit_instance(const char *cache_name, size_t name_len, int flush)
goto stop_thread;
}
} else {
if (flush_status) {
status = flush_status;
goto stop_thread;
}
/*
* We are being switched to upgrade in flight mode -
* wait for finishing pending core requests
@ -2455,6 +2445,8 @@ int cache_mngt_exit_instance(const char *cache_name, size_t name_len, int flush)
/* Flush cache again. This time we don't allow interruption. */
if (flush)
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));
@ -2466,6 +2458,12 @@ int cache_mngt_exit_instance(const char *cache_name, size_t name_len, int flush)
"Waiting for cache stop interrupted. "
"Stop will finish asynchronously.\n");
if ((status == 0 || status == -KCAS_ERR_WAITING_INTERRUPTED) &&
flush_status) {
/* "removed dirty" error has a precedence over "interrupted" */
return KCAS_ERR_STOPPED_DIRTY;
}
return status;
stop_thread: