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Failover detach

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Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
This commit is contained in:
Adam Rutkowski 2021-10-06 12:36:39 +02:00 committed by ajrutkow
parent d962a89872
commit 5ad4d937f6
6 changed files with 273 additions and 124 deletions
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10
example/simple/src/main.c
View File

@ -94,7 +94,7 @@ static void simple_complete(ocf_cache_t cache, void *priv, int error)
int initialize_cache(ocf_ctx_t ctx, ocf_cache_t *cache)
{
struct ocf_mngt_cache_config cache_cfg = { .name = "cache1" };
struct ocf_mngt_cache_device_config device_cfg = { };
struct ocf_mngt_cache_attach_config attach_cfg = { };
struct cache_priv *cache_priv;
struct simple_context context;
int ret;
@ -110,9 +110,9 @@ int initialize_cache(ocf_ctx_t ctx, ocf_cache_t *cache)
cache_cfg.metadata_volatile = true;
/* Cache deivce (volume) configuration */
ocf_mngt_cache_device_config_set_default(&device_cfg);
device_cfg.volume_type = VOL_TYPE;
ret = ocf_uuid_set_str(&device_cfg.uuid, "cache");
ocf_mngt_cache_attach_config_set_default(&attach_cfg);
attach_cfg.device.volume_type = VOL_TYPE;
ret = ocf_uuid_set_str(&attach_cfg.device.uuid, "cache");
if (ret)
return ret;
@ -158,7 +158,7 @@ int initialize_cache(ocf_ctx_t ctx, ocf_cache_t *cache)
goto err_cache;
/* Attach volume to cache */
ocf_mngt_cache_attach(*cache, &device_cfg, simple_complete, &context);
ocf_mngt_cache_attach(*cache, &attach_cfg, simple_complete, &context);
if (ret)
goto err_cache;

5
inc/ocf_cache.h
View File

@ -92,6 +92,9 @@ struct ocf_cache_info {
uint32_t metadata_end_offset;
/*!< LBA offset where metadata ends (in 4KiB blocks) */
bool failover_detached;
/*!< true if cache drive detached for failover */
};
/**
@ -159,7 +162,7 @@ bool ocf_cache_is_running(ocf_cache_t cache);
* @retval 1 Caching device is in passive state
* @retval 0 Caching device is not in passive state
*/
bool ocf_cache_is_passive(ocf_cache_t cache);
bool ocf_cache_is_standby(ocf_cache_t cache);
/**
* @brief Get cache mode of given cache object

4
inc/ocf_def.h
View File

@ -124,8 +124,8 @@ typedef enum {
ocf_cache_state_incomplete = 3, //!< ocf_cache_state_incomplete
/*!< OCF cache has at least one inactive core */
ocf_cache_state_passive = 4, //!< ocf_cache_state_passive
/*!< OCF is currently in passive mode */
ocf_cache_state_standby = 4, //!< ocf_cache_state_standby
/*!< OCF is currently in standby mode */
ocf_cache_state_max //!< ocf_cache_state_max
/*!< Stopper of cache state enumerator */

68
inc/ocf_mngt.h
View File

@ -359,7 +359,7 @@ void ocf_mngt_cache_stop(ocf_cache_t cache,
ocf_mngt_cache_stop_end_t cmpl, void *priv);
/**
* @brief Cache attach configuration
* @brief Caching device configuration
*/
struct ocf_mngt_cache_device_config {
/**
@ -367,16 +367,38 @@ struct ocf_mngt_cache_device_config {
*/
struct ocf_volume_uuid uuid;
/**
* @brief Cache line size
*/
ocf_cache_line_size_t cache_line_size;
/**
* @brief Cache volume type
*/
uint8_t volume_type;
/**
* @brief If set, cache features (like discard) are tested
* before starting cache
*/
bool perform_test;
/**
* @brief Optional opaque volume parameters, passed down to cache volume
* open callback
*/
void *volume_params;
};
/**
* @brief Cache attach configuration
*/
struct ocf_mngt_cache_attach_config {
/**
* @brief Cache device configuration - must be the first field
*/
struct ocf_mngt_cache_device_config device;
/**
* @brief Cache line size
*/
ocf_cache_line_size_t cache_line_size;
/**
* @brief Automatically open core volumes when loading cache
*
@ -400,22 +422,10 @@ struct ocf_mngt_cache_device_config {
*/
bool force;
/**
* @brief If set, cache features (like discard) are tested
* before starting cache
*/
bool perform_test;
/**
* @brief If set, cache device will be discarded on cache start
*/
bool discard_on_start;
/**
* @brief Optional opaque volume parameters, passed down to cache volume
* open callback
*/
void *volume_params;
};
/**
@ -426,15 +436,15 @@ struct ocf_mngt_cache_device_config {
*
* @param[in] cfg Cache device config stucture
*/
static inline void ocf_mngt_cache_device_config_set_default(
struct ocf_mngt_cache_device_config *cfg)
static inline void ocf_mngt_cache_attach_config_set_default(
struct ocf_mngt_cache_attach_config *cfg)
{
cfg->cache_line_size = ocf_cache_line_size_none;
cfg->open_cores = true;
cfg->force = false;
cfg->perform_test = true;
cfg->discard_on_start = true;
cfg->volume_params = NULL;
cfg->device.perform_test = true;
cfg->device.volume_params = NULL;
}
/**
@ -469,7 +479,7 @@ typedef void (*ocf_mngt_cache_attach_end_t)(ocf_cache_t cache,
* @param[in] priv Completion callback context
*/
void ocf_mngt_cache_attach(ocf_cache_t cache,
struct ocf_mngt_cache_device_config *cfg,
struct ocf_mngt_cache_attach_config *cfg,
ocf_mngt_cache_attach_end_t cmpl, void *priv);
/**
@ -511,7 +521,7 @@ typedef void (*ocf_mngt_cache_load_end_t)(ocf_cache_t cache,
* @param[in] priv Completion callback context
*/
void ocf_mngt_cache_load(ocf_cache_t cache,
struct ocf_mngt_cache_device_config *cfg,
struct ocf_mngt_cache_attach_config *cfg,
ocf_mngt_cache_load_end_t cmpl, void *priv);
/**
@ -525,17 +535,21 @@ typedef void (*ocf_mngt_cache_bind_end_t)(ocf_cache_t cache,
void *priv, int error);
/**
* @brief Bind cache instance
* @brief Initiate failover standby
*
* @param[in] cache Cache handle
* @param[in] cfg Caching device configuration
* @param[in] cmpl Completion callback
* @param[in] priv Completion callback context
*/
void ocf_mngt_cache_bind(ocf_cache_t cache,
struct ocf_mngt_cache_device_config *cfg,
void ocf_mngt_cache_standby(ocf_cache_t cache,
struct ocf_mngt_cache_attach_config *cfg,
ocf_mngt_cache_bind_end_t cmpl, void *priv);
typedef void (*ocf_mngt_cache_failover_detach_end_t)(void *priv, int error);
void ocf_mngt_cache_failover_detach(ocf_cache_t cache,
ocf_mngt_cache_failover_detach_end_t cmpl, void *priv);
/**
* @brief Completion callback of cache activate operation
*

300
src/mngt/ocf_mngt_cache.c
View File

@ -87,10 +87,11 @@ typedef void (*_ocf_mngt_cache_attach_end_t)(ocf_cache_t, void *priv1,
void *priv2, int error);
struct ocf_cache_attach_context {
struct ocf_mngt_cache_attach_config cfg;
ocf_cache_t cache;
/*!< cache that is being initialized */
struct ocf_mngt_cache_device_config cfg;
uint64_t volume_size;
/*!< size of the device in cache lines */
@ -134,6 +135,14 @@ struct ocf_cache_attach_context {
* load or recovery
*/
bool uuid_copied : 1;
/*!< copied uuid data to context.
*/
bool metadata_frozen : 1;
/*!< metadata reference counter frozen
*/
bool concurrency_inited : 1;
} flags;
@ -690,6 +699,7 @@ static void _ocf_mngt_attach_cache_device(ocf_pipeline_t pipeline,
void *priv, ocf_pipeline_arg_t arg)
{
struct ocf_cache_attach_context *context = priv;
struct ocf_mngt_cache_device_config *device_cfg = &context->cfg.device;
ocf_cache_t cache = context->cache;
ocf_volume_type_t type;
int ret;
@ -701,14 +711,14 @@ static void _ocf_mngt_attach_cache_device(ocf_pipeline_t pipeline,
context->flags.device_alloc = true;
/* Prepare UUID of cache volume */
type = ocf_ctx_get_volume_type(cache->owner, context->cfg.volume_type);
type = ocf_ctx_get_volume_type(cache->owner, device_cfg->volume_type);
if (!type) {
OCF_PL_FINISH_RET(pipeline,
-OCF_ERR_INVAL_VOLUME_TYPE);
}
ret = ocf_volume_init(&cache->device->volume, type,
&context->cfg.uuid, true);
&device_cfg->uuid, true);
if (ret)
OCF_PL_FINISH_RET(pipeline, ret);
@ -720,7 +730,7 @@ static void _ocf_mngt_attach_cache_device(ocf_pipeline_t pipeline,
* need to know size of cache device.
*/
ret = ocf_volume_open(&cache->device->volume,
context->cfg.volume_params);
device_cfg->volume_params);
if (ret) {
ocf_cache_log(cache, log_err, "ERROR: Cache not available\n");
OCF_PL_FINISH_RET(pipeline, ret);
@ -943,13 +953,14 @@ static void _ocf_mngt_test_volume(ocf_pipeline_t pipeline,
void *priv, ocf_pipeline_arg_t arg)
{
struct ocf_cache_attach_context *context = priv;
struct ocf_mngt_cache_device_config *device_cfg = &context->cfg.device;
ocf_cache_t cache = context->cache;
ocf_pipeline_t test_pipeline;
int result;
cache->device->volume.features.discard_zeroes = 1;
if (!context->cfg.perform_test)
if (!device_cfg->perform_test)
OCF_PL_NEXT_RET(pipeline);
context->test.reserved_lba_addr = ocf_metadata_get_reserved_lba(cache);
@ -1154,8 +1165,7 @@ int ocf_mngt_get_ram_needed(ocf_cache_t cache,
if (!type)
return -OCF_ERR_INVAL_VOLUME_TYPE;
result = ocf_volume_create(&volume, type,
&cfg->uuid);
result = ocf_volume_create(&volume, type, &cfg->uuid);
if (result)
return result;
@ -1319,15 +1329,15 @@ static void _ocf_mngt_cache_set_passive(ocf_cache_t cache)
* Clear initialization state and set the passive bit.
*/
env_bit_clear(ocf_cache_state_initializing, &cache->cache_state);
env_bit_set(ocf_cache_state_passive, &cache->cache_state);
env_bit_set(ocf_cache_state_standby, &cache->cache_state);
}
static void _ocf_mngt_cache_set_active(ocf_cache_t cache)
{
/*
* Clear passive state and set the running bit.
* Clear standby state and set the running bit.
*/
env_bit_clear(ocf_cache_state_passive, &cache->cache_state);
env_bit_clear(ocf_cache_state_standby, &cache->cache_state);
env_bit_set(ocf_cache_state_running, &cache->cache_state);
}
@ -1346,22 +1356,26 @@ static void _ocf_mngt_copy_uuid_data(ocf_pipeline_t pipeline,
void *priv, ocf_pipeline_arg_t arg)
{
struct ocf_cache_attach_context *context = priv;
struct ocf_mngt_cache_device_config *cfg = &context->cfg;
struct ocf_mngt_cache_device_config *device_cfg = &context->cfg.device;
void *data;
int result;
data = env_vmalloc(cfg->uuid.size);
if (device_cfg->uuid.size == 0)
OCF_PL_NEXT_RET(pipeline);
data = env_vmalloc(device_cfg->uuid.size);
if (!data)
OCF_PL_FINISH_RET(pipeline, -OCF_ERR_NO_MEM);
result = env_memcpy(data, cfg->uuid.size, cfg->uuid.data,
cfg->uuid.size);
result = env_memcpy(data, device_cfg->uuid.size, device_cfg->uuid.data,
device_cfg->uuid.size);
if (result) {
env_vfree(data);
OCF_PL_FINISH_RET(pipeline, -OCF_ERR_INVAL);
}
context->cfg.uuid.data = data;
device_cfg->uuid.data = data;
context->flags.uuid_copied = true;
ocf_pipeline_next(pipeline);
}
@ -1639,13 +1653,16 @@ static void _ocf_mngt_cache_attach_finish(ocf_pipeline_t pipeline,
void *priv, int error)
{
struct ocf_cache_attach_context *context = priv;
struct ocf_mngt_cache_device_config *device_cfg = &context->cfg.device;
if (error)
_ocf_mngt_attach_handle_error(context);
context->cmpl(context->cache, context->priv1, context->priv2, error);
env_vfree(context->cfg.uuid.data);
if (context->flags.uuid_copied)
env_vfree(device_cfg->uuid.data);
ocf_pipeline_destroy(context->pipeline);
}
@ -2020,7 +2037,7 @@ static void _ocf_mngt_bind_post_init(ocf_pipeline_t pipeline,
ocf_pipeline_next(pipeline);
}
struct ocf_pipeline_properties _ocf_mngt_cache_bind_pipeline_properties = {
struct ocf_pipeline_properties _ocf_mngt_cache_standby_pipeline_properties = {
.priv_size = sizeof(struct ocf_cache_attach_context),
.finish = _ocf_mngt_cache_attach_finish,
.steps = {
@ -2039,57 +2056,78 @@ struct ocf_pipeline_properties _ocf_mngt_cache_bind_pipeline_properties = {
},
};
static void _ocf_mngt_activate_wait_metadata_io_finish(void *priv)
struct ocf_cache_failover_detach_context {
ocf_pipeline_t pipeline;
ocf_cache_t cache;
ocf_mngt_cache_failover_detach_end_t cmpl;
void *priv;
};
static void _ocf_mngt_failover_detach_wait_metadata_io_finish(void *priv)
{
struct ocf_cache_attach_context *context = priv;
struct ocf_cache_failover_detach_context *context = priv;
ocf_pipeline_next(context->pipeline);
}
static void _ocf_mngt_activate_wait_metadata_io(ocf_pipeline_t pipeline,
static void _ocf_mngt_failover_detach_wait_metadata_io(ocf_pipeline_t pipeline,
void *priv, ocf_pipeline_arg_t arg)
{
struct ocf_cache_attach_context *context = priv;
struct ocf_cache_failover_detach_context *context = priv;
ocf_cache_t cache = context->cache;
ocf_refcnt_freeze(&cache->refcnt.metadata);
ocf_refcnt_register_zero_cb(&cache->refcnt.metadata,
_ocf_mngt_activate_wait_metadata_io_finish, context);
_ocf_mngt_failover_detach_wait_metadata_io_finish, context);
}
static void _ocf_mngt_activate_swap_cache_device(ocf_pipeline_t pipeline,
void *priv, ocf_pipeline_arg_t arg)
{
struct ocf_cache_attach_context *context = priv;
ocf_cache_t cache = context->cache;
struct ocf_mngt_cache_device_config *device_cfg = &context->cfg.device;
const struct ocf_volume_uuid *cache_uuid;
ocf_cache_t cache = context->cache;
ocf_volume_t cache_volume = ocf_cache_get_volume(cache);
ocf_volume_type_t type;
int ret, cmp;
cache_uuid = ocf_volume_get_uuid(ocf_cache_get_volume(cache));
ret = env_memcmp(context->cfg.uuid.data, context->cfg.uuid.size,
cache_uuid->data, cache_uuid->size, &cmp);
if (ret)
OCF_PL_FINISH_RET(pipeline, ret);
if (device_cfg->uuid.size == 0) {
if (cache_volume->opened)
OCF_PL_NEXT_RET(pipeline);
else
OCF_PL_FINISH_RET(pipeline, -EINVAL);
}
if (cmp == 0)
OCF_PL_NEXT_RET(pipeline);
if (cache_volume->opened) {
/* if uuid does not change then skip this step */
cache_uuid = ocf_volume_get_uuid(cache_volume);
ret = env_memcmp(device_cfg->uuid.data, device_cfg->uuid.size,
cache_uuid->data, cache_uuid->size, &cmp);
if (ret)
OCF_PL_FINISH_RET(pipeline, ret);
ret = ocf_volume_init(&context->cache_volume, 0, NULL, false);
if (!ret)
OCF_PL_FINISH_RET(pipeline, ret);
if (cmp == 0)
OCF_PL_NEXT_RET(pipeline);
ocf_volume_move(&context->cache_volume, &cache->device->volume);
context->flags.volume_stored = true;
/* move cache volume to the context */
ret = ocf_volume_init(&context->cache_volume,
cache_volume->type, NULL, false);
if (ret)
OCF_PL_FINISH_RET(pipeline, ret);
type = ocf_ctx_get_volume_type(cache->owner, context->cfg.volume_type);
ocf_volume_move(&context->cache_volume, &cache->device->volume);
context->flags.volume_stored = true;
}
type = ocf_ctx_get_volume_type(cache->owner, device_cfg->volume_type);
if (!type) {
OCF_PL_FINISH_RET(pipeline,
-OCF_ERR_INVAL_VOLUME_TYPE);
}
ret = ocf_volume_init(&cache->device->volume, type,
&context->cfg.uuid, true);
&device_cfg->uuid, true);
if (ret)
OCF_PL_FINISH_RET(pipeline, ret);
@ -2097,7 +2135,7 @@ static void _ocf_mngt_activate_swap_cache_device(ocf_pipeline_t pipeline,
context->flags.volume_inited = true;
ret = ocf_volume_open(&cache->device->volume,
context->cfg.volume_params);
device_cfg->volume_params);
if (ret) {
ocf_cache_log(cache, log_err, "ERROR: Cache not available\n");
OCF_PL_FINISH_RET(pipeline, ret);
@ -2219,13 +2257,15 @@ static void _ocf_mngt_activate_handle_error(
if (context->flags.volume_stored)
ocf_volume_move(&cache->device->volume, &context->cache_volume);
ocf_refcnt_unfreeze(&cache->refcnt.metadata);
if (context->flags.metadata_frozen)
ocf_refcnt_unfreeze(&cache->refcnt.metadata);
}
static void _ocf_mngt_cache_activate_finish(ocf_pipeline_t pipeline,
void *priv, int error)
{
struct ocf_cache_attach_context *context = priv;
struct ocf_mngt_cache_device_config *device_cfg = &context->cfg.device;
ocf_cache_t cache = context->cache;
ocf_pipeline_t stop_pipeline;
@ -2244,12 +2284,18 @@ static void _ocf_mngt_cache_activate_finish(ocf_pipeline_t pipeline,
ocf_pipeline_destroy(cache->stop_pipeline);
cache->stop_pipeline = stop_pipeline;
ocf_volume_deinit(&context->cache_volume);
if (context->flags.volume_stored) {
if (context->cache_volume.opened)
ocf_volume_close(&context->cache_volume);
ocf_volume_deinit(&context->cache_volume);
}
out:
context->cmpl(context->cache, context->priv1, context->priv2, error);
env_vfree(context->cfg.uuid.data);
if (context->flags.uuid_copied)
env_vfree(device_cfg->uuid.data);
ocf_pipeline_destroy(context->pipeline);
}
@ -2258,7 +2304,6 @@ struct ocf_pipeline_properties _ocf_mngt_cache_activate_pipeline_properties = {
.finish = _ocf_mngt_cache_activate_finish,
.steps = {
OCF_PL_STEP(_ocf_mngt_copy_uuid_data),
OCF_PL_STEP(_ocf_mngt_activate_wait_metadata_io),
OCF_PL_STEP(_ocf_mngt_activate_swap_cache_device),
OCF_PL_STEP(_ocf_mngt_activate_check_superblock),
OCF_PL_STEP(_ocf_mngt_activate_compare_superblock),
@ -2275,7 +2320,7 @@ struct ocf_pipeline_properties _ocf_mngt_cache_activate_pipeline_properties = {
};
static void _ocf_mngt_cache_attach(ocf_cache_t cache,
struct ocf_mngt_cache_device_config *cfg,
struct ocf_mngt_cache_attach_config *cfg,
_ocf_mngt_cache_attach_end_t cmpl, void *priv1, void *priv2)
{
struct ocf_cache_attach_context *context;
@ -2308,7 +2353,7 @@ static void _ocf_mngt_cache_attach(ocf_cache_t cache,
}
static void _ocf_mngt_cache_load(ocf_cache_t cache,
struct ocf_mngt_cache_device_config *cfg,
struct ocf_mngt_cache_attach_config *cfg,
_ocf_mngt_cache_attach_end_t cmpl, void *priv1, void *priv2)
{
struct ocf_cache_attach_context *context;
@ -2352,8 +2397,8 @@ ocf_mngt_cache_stop_passive_pipeline_properties = {
},
};
static void _ocf_mngt_cache_bind(ocf_cache_t cache,
struct ocf_mngt_cache_device_config *cfg,
static void _ocf_mngt_cache_standby(ocf_cache_t cache,
struct ocf_mngt_cache_attach_config *cfg,
_ocf_mngt_cache_attach_end_t cmpl, void *priv1, void *priv2)
{
struct ocf_cache_attach_context *context;
@ -2361,7 +2406,7 @@ static void _ocf_mngt_cache_bind(ocf_cache_t cache,
int result;
result = ocf_pipeline_create(&pipeline, cache,
&_ocf_mngt_cache_bind_pipeline_properties);
&_ocf_mngt_cache_standby_pipeline_properties);
if (result)
OCF_CMPL_RET(cache, priv1, priv2, -OCF_ERR_NO_MEM);
@ -2385,15 +2430,74 @@ static void _ocf_mngt_cache_bind(ocf_cache_t cache,
OCF_PL_NEXT_RET(pipeline);
}
static void _ocf_mngt_failover_detach_close_volume(ocf_pipeline_t pipeline,
void *priv, ocf_pipeline_arg_t arg)
{
struct ocf_cache_failover_detach_context *context = priv;
ocf_cache_t cache = context->cache;
if (cache->device->volume.opened) {
ocf_volume_close(&cache->device->volume);
ocf_volume_deinit(&cache->device->volume);
}
ocf_pipeline_next(pipeline);
}
static void ocf_mngt_cache_failover_detach_finish(ocf_pipeline_t pipeline,
void *priv, int error)
{
struct ocf_cache_failover_detach_context *context = priv;
context->cmpl(context->priv, error);
ocf_pipeline_destroy(context->pipeline);
}
struct ocf_pipeline_properties
_ocf_mngt_cache_failover_detach_pipeline_properties = {
.priv_size = sizeof(struct ocf_cache_failover_detach_context),
.finish = ocf_mngt_cache_failover_detach_finish,
.steps = {
OCF_PL_STEP(_ocf_mngt_failover_detach_wait_metadata_io),
OCF_PL_STEP(_ocf_mngt_failover_detach_close_volume),
OCF_PL_STEP_TERMINATOR(),
},
};
void _ocf_mngt_cache_failover_detach(ocf_cache_t cache,
ocf_mngt_cache_failover_detach_end_t cmpl, void *priv)
{
struct ocf_cache_failover_detach_context *context;
ocf_pipeline_t pipeline;
int result;
result = ocf_pipeline_create(&pipeline, cache,
&_ocf_mngt_cache_failover_detach_pipeline_properties);
if (result)
OCF_CMPL_RET(priv, -OCF_ERR_NO_MEM);
context = ocf_pipeline_get_priv(pipeline);
context->cmpl = cmpl;
context->priv = priv;
context->pipeline = pipeline;
context->cache = cache;
OCF_PL_NEXT_RET(pipeline);
}
static void _ocf_mngt_cache_activate(ocf_cache_t cache,
struct ocf_mngt_cache_device_config *cfg,
struct ocf_mngt_cache_device_config *device_cfg,
_ocf_mngt_cache_attach_end_t cmpl, void *priv1, void *priv2)
{
struct ocf_cache_attach_context *context;
ocf_pipeline_t pipeline;
int result;
if (!ocf_cache_is_passive(cache))
if (!ocf_cache_is_standby(cache))
OCF_CMPL_RET(cache, priv1, priv2, -OCF_ERR_CACHE_EXIST);
result = ocf_pipeline_create(&pipeline, cache,
@ -2401,15 +2505,38 @@ static void _ocf_mngt_cache_activate(ocf_cache_t cache,
if (result)
OCF_CMPL_RET(cache, priv1, priv2, -OCF_ERR_NO_MEM);
context = ocf_pipeline_get_priv(pipeline);
context->cmpl = cmpl;
context->priv1 = priv1;
context->priv2 = priv2;
context->pipeline = pipeline;
context->cache = cache;
context->cfg = *cfg;
context->cfg.device = *device_cfg;
context->cfg.cache_line_size = cache->metadata.line_size;
context->cfg.open_cores = true;
context->cfg.force = false;
context->cfg.discard_on_start = false;
/* Metadata reference counter not frozen in standby mode
* indicates the caching drive is still attached. In
* this case it must be frozen now to avoid unwanted
* concurrency during management operation.
*/
if (!ocf_refcnt_frozen(&cache->refcnt.metadata)) {
ENV_BUG_ON(!cache->device->volume.opened);
context->flags.metadata_frozen = true;
ocf_refcnt_freeze(&cache->refcnt.metadata);
/* Callback set to ocf_pipeline_next directly to
* queue pipeline first step upon receiving the
* callback. */
ocf_refcnt_register_zero_cb(&cache->refcnt.metadata,
(ocf_refcnt_cb_t)ocf_pipeline_next, pipeline);
return;
}
OCF_PL_NEXT_RET(pipeline);
}
@ -2441,17 +2568,17 @@ static int _ocf_mngt_cache_validate_cfg(struct ocf_mngt_cache_config *cfg)
return 0;
}
static int _ocf_mngt_cache_validate_device_cfg(
struct ocf_mngt_cache_device_config *device_cfg)
static int _ocf_mngt_cache_validate_attach_cfg(
struct ocf_mngt_cache_attach_config *attach_cfg)
{
if (!device_cfg->uuid.data)
if (!attach_cfg->device.uuid.data)
return -OCF_ERR_INVAL;
if (device_cfg->uuid.size > OCF_VOLUME_UUID_MAX_SIZE)
if (attach_cfg->device.uuid.size > OCF_VOLUME_UUID_MAX_SIZE)
return -OCF_ERR_INVAL;
if (device_cfg->cache_line_size != ocf_cache_line_size_none &&
!ocf_cache_line_size_is_valid(device_cfg->cache_line_size))
if (attach_cfg->cache_line_size != ocf_cache_line_size_none &&
!ocf_cache_line_size_is_valid(attach_cfg->cache_line_size))
return -OCF_ERR_INVALID_CACHE_LINE_SIZE;
return 0;
@ -2528,7 +2655,7 @@ static void _ocf_mngt_cache_attach_complete(ocf_cache_t cache, void *priv1,
}
void ocf_mngt_cache_attach(ocf_cache_t cache,
struct ocf_mngt_cache_device_config *cfg,
struct ocf_mngt_cache_attach_config *cfg,
ocf_mngt_cache_attach_end_t cmpl, void *priv)
{
int result;
@ -2539,7 +2666,7 @@ void ocf_mngt_cache_attach(ocf_cache_t cache,
if (!cache->mngt_queue)
OCF_CMPL_RET(cache, priv, -OCF_ERR_INVAL);
result = _ocf_mngt_cache_validate_device_cfg(cfg);
result = _ocf_mngt_cache_validate_attach_cfg(cfg);
if (result)
OCF_CMPL_RET(cache, priv, result);
@ -2635,7 +2762,7 @@ static void _ocf_mngt_cache_load_complete(ocf_cache_t cache, void *priv1,
}
void ocf_mngt_cache_load(ocf_cache_t cache,
struct ocf_mngt_cache_device_config *cfg,
struct ocf_mngt_cache_attach_config *cfg,
ocf_mngt_cache_load_end_t cmpl, void *priv)
{
int result;
@ -2657,14 +2784,14 @@ void ocf_mngt_cache_load(ocf_cache_t cache,
OCF_CMPL_RET(cache, priv, -OCF_ERR_INVAL);
}
result = _ocf_mngt_cache_validate_device_cfg(cfg);
result = _ocf_mngt_cache_validate_attach_cfg(cfg);
if (result)
OCF_CMPL_RET(cache, priv, result);
_ocf_mngt_cache_load(cache, cfg, _ocf_mngt_cache_load_complete, cmpl, priv);
}
static void _ocf_mngt_cache_bind_complete(ocf_cache_t cache, void *priv1,
static void _ocf_mngt_cache_standby_complete(ocf_cache_t cache, void *priv1,
void *priv2, int error)
{
ocf_mngt_cache_bind_end_t cmpl = priv1;
@ -2678,8 +2805,8 @@ static void _ocf_mngt_cache_bind_complete(ocf_cache_t cache, void *priv1,
OCF_CMPL_RET(cache, priv2, 0);
}
void ocf_mngt_cache_bind(ocf_cache_t cache,
struct ocf_mngt_cache_device_config *cfg,
void ocf_mngt_cache_standby(ocf_cache_t cache,
struct ocf_mngt_cache_attach_config *cfg,
ocf_mngt_cache_bind_end_t cmpl, void *priv)
{
int result;
@ -2701,18 +2828,18 @@ void ocf_mngt_cache_bind(ocf_cache_t cache,
OCF_CMPL_RET(cache, priv, -OCF_ERR_INVAL);
}
result = _ocf_mngt_cache_validate_device_cfg(cfg);
result = _ocf_mngt_cache_validate_attach_cfg(cfg);
if (result)
OCF_CMPL_RET(cache, priv, result);
_ocf_mngt_cache_bind(cache, cfg, _ocf_mngt_cache_bind_complete,
_ocf_mngt_cache_standby(cache, cfg, _ocf_mngt_cache_standby_complete,
cmpl, priv);
}
static void _ocf_mngt_cache_activate_complete(ocf_cache_t cache, void *priv1,
void *priv2, int error)
{
ocf_mngt_cache_bind_end_t cmpl = priv1;
ocf_mngt_cache_activate_end_t cmpl = priv1;
if (error)
OCF_CMPL_RET(cache, priv2, error);
@ -2723,34 +2850,37 @@ static void _ocf_mngt_cache_activate_complete(ocf_cache_t cache, void *priv1,
OCF_CMPL_RET(cache, priv2, 0);
}
void ocf_mngt_cache_failover_detach(ocf_cache_t cache,
ocf_mngt_cache_failover_detach_end_t cmpl, void *priv)
{
OCF_CHECK_NULL(cache);
if (!cache->mngt_queue)
OCF_CMPL_RET(priv, -OCF_ERR_INVAL);
if (!ocf_cache_is_standby(cache))
OCF_CMPL_RET(priv, -OCF_ERR_CACHE_EXIST);
if (ocf_refcnt_frozen(&cache->refcnt.metadata))
OCF_CMPL_RET(priv, -OCF_ERR_INVAL);
ENV_BUG_ON(!cache->device->volume.opened);
_ocf_mngt_cache_failover_detach(cache, cmpl, priv);
}
void ocf_mngt_cache_activate(ocf_cache_t cache,
struct ocf_mngt_cache_device_config *cfg,
ocf_mngt_cache_activate_end_t cmpl, void *priv)
{
int result;
OCF_CHECK_NULL(cache);
OCF_CHECK_NULL(cfg);
if (cfg->force) {
ocf_cache_log(cache, log_err, "Using 'force' flag is forbidden "
"for activate operation.");
OCF_CMPL_RET(cache, priv, -OCF_ERR_INVAL);
}
if (cfg->cache_line_size != ocf_cache_line_size_none &&
cfg->cache_line_size != cache->metadata.line_size) {
ocf_cache_log(cache, log_err, "Specifying cache line size is "
"forbidden for activate operation.");
OCF_CMPL_RET(cache, priv, -OCF_ERR_INVAL);
}
if (!cache->mngt_queue)
OCF_CMPL_RET(cache, priv, -OCF_ERR_INVAL);
result = _ocf_mngt_cache_validate_device_cfg(cfg);
if (result)
OCF_CMPL_RET(cache, priv, result);
if (cfg->uuid.size > OCF_VOLUME_UUID_MAX_SIZE)
OCF_CMPL_RET(cache, priv, -OCF_ERR_INVAL);
_ocf_mngt_cache_activate(cache, cfg, _ocf_mngt_cache_activate_complete,
cmpl, priv);

10
src/ocf_cache.c
View File

@ -56,10 +56,10 @@ bool ocf_cache_is_running(ocf_cache_t cache)
return env_bit_test(ocf_cache_state_running, &cache->cache_state);
}
bool ocf_cache_is_passive(ocf_cache_t cache)
bool ocf_cache_is_standby(ocf_cache_t cache)
{
OCF_CHECK_NULL(cache);
return env_bit_test(ocf_cache_state_passive, &cache->cache_state);
return env_bit_test(ocf_cache_state_standby, &cache->cache_state);
}
bool ocf_cache_is_device_attached(ocf_cache_t cache)
@ -107,7 +107,9 @@ int ocf_cache_get_info(ocf_cache_t cache, struct ocf_cache_info *info)
_ocf_stats_zero(&info->inactive);
info->attached = ocf_cache_is_device_attached(cache);
if (info->attached) {
info->failover_detached = ocf_cache_is_standby(cache) &&
ocf_refcnt_frozen(&cache->refcnt.metadata);
if (info->attached && !info->failover_detached) {
info->volume_type = ocf_ctx_get_volume_type_id(cache->owner,
cache->device->volume.type);
info->size = cache->conf_meta->cachelines;
@ -119,7 +121,7 @@ int ocf_cache_get_info(ocf_cache_t cache, struct ocf_cache_info *info)
info->metadata_footprint = ocf_cache_is_device_attached(cache) ?
ocf_metadata_size_of(cache) : 0;
if (env_bit_test(ocf_cache_state_passive, &cache->cache_state))
if (ocf_cache_is_standby(cache))
return 0;
info->core_count = cache->conf_meta->core_count;