* will be called one by one to handle each own result.
*
*
+ * There are three kinds of transactions
+ *
+ * 1. Local transaction, all of updates of the transaction are in the local MDT.
+ * 2. Remote transaction, all of updates of the transaction are in one remote
+ * MDT, which only happens in LFSCK now.
+ * 3. Distribute transaction, updates for the transaction are in mulitple MDTs.
+ *
* Author: Di Wang <di.wang@intel.com>
* Author: Fan, Yong <fan.yong@intel.com>
*/
#include "osp_internal.h"
-struct osp_async_update_args {
+/**
+ * The argument for the interpreter callback of osp request.
+ */
+struct osp_update_args {
struct dt_update_request *oaua_update;
atomic_t *oaua_count;
wait_queue_head_t *oaua_waitq;
bool oaua_flow_control;
};
-struct osp_async_request {
+/**
+ * Call back for each update request.
+ */
+struct osp_update_callback {
/* list in the dt_update_request::dur_cb_items */
- struct list_head oar_list;
+ struct list_head ouc_list;
/* The target of the async update request. */
- struct osp_object *oar_obj;
+ struct osp_object *ouc_obj;
- /* The data used by oar_interpreter. */
- void *oar_data;
+ /* The data used by or_interpreter. */
+ void *ouc_data;
/* The interpreter function called after the async request handled. */
- osp_async_request_interpreter_t oar_interpreter;
+ osp_update_interpreter_t ouc_interpreter;
};
+static struct object_update_request *object_update_request_alloc(size_t size)
+{
+ struct object_update_request *ourq;
+
+ OBD_ALLOC_LARGE(ourq, size);
+ if (ourq == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ ourq->ourq_magic = UPDATE_REQUEST_MAGIC;
+ ourq->ourq_count = 0;
+
+ return ourq;
+}
+
+static void object_update_request_free(struct object_update_request *ourq,
+ size_t ourq_size)
+{
+ if (ourq != NULL)
+ OBD_FREE_LARGE(ourq, ourq_size);
+}
+
/**
- * Allocate an asynchronous request and initialize it with the given parameters.
+ * Allocate and initialize dt_update_request
+ *
+ * dt_update_request is being used to track updates being executed on
+ * this dt_device(OSD or OSP). The update buffer will be 4k initially,
+ * and increased if needed.
+ *
+ * \param [in] dt dt device
+ *
+ * \retval dt_update_request being allocated if succeed
+ * \retval ERR_PTR(errno) if failed
+ */
+struct dt_update_request *dt_update_request_create(struct dt_device *dt)
+{
+ struct dt_update_request *dt_update;
+ struct object_update_request *ourq;
+
+ OBD_ALLOC_PTR(dt_update);
+ if (dt_update == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ ourq = object_update_request_alloc(OUT_UPDATE_INIT_BUFFER_SIZE);
+ if (IS_ERR(ourq)) {
+ OBD_FREE_PTR(dt_update);
+ return ERR_CAST(ourq);
+ }
+
+ dt_update->dur_buf.ub_req = ourq;
+ dt_update->dur_buf.ub_req_size = OUT_UPDATE_INIT_BUFFER_SIZE;
+
+ dt_update->dur_dt = dt;
+ dt_update->dur_batchid = 0;
+ INIT_LIST_HEAD(&dt_update->dur_cb_items);
+
+ return dt_update;
+}
+
+/**
+ * Destroy dt_update_request
+ *
+ * \param [in] dt_update dt_update_request being destroyed
+ */
+void dt_update_request_destroy(struct dt_update_request *dt_update)
+{
+ if (dt_update == NULL)
+ return;
+
+ object_update_request_free(dt_update->dur_buf.ub_req,
+ dt_update->dur_buf.ub_req_size);
+ OBD_FREE_PTR(dt_update);
+}
+
+/**
+ * Allocate an osp request and initialize it with the given parameters.
*
* \param[in] obj pointer to the operation target
* \param[in] data pointer to the data used by the interpreter
* \retval pointer to the asychronous request
* \retval NULL if the allocation failed
*/
-static struct osp_async_request *
-osp_async_request_init(struct osp_object *obj, void *data,
- osp_async_request_interpreter_t interpreter)
+static struct osp_update_callback *
+osp_update_callback_init(struct osp_object *obj, void *data,
+ osp_update_interpreter_t interpreter)
{
- struct osp_async_request *oar;
+ struct osp_update_callback *ouc;
- OBD_ALLOC_PTR(oar);
- if (oar == NULL)
+ OBD_ALLOC_PTR(ouc);
+ if (ouc == NULL)
return NULL;
lu_object_get(osp2lu_obj(obj));
- INIT_LIST_HEAD(&oar->oar_list);
- oar->oar_obj = obj;
- oar->oar_data = data;
- oar->oar_interpreter = interpreter;
+ INIT_LIST_HEAD(&ouc->ouc_list);
+ ouc->ouc_obj = obj;
+ ouc->ouc_data = data;
+ ouc->ouc_interpreter = interpreter;
- return oar;
+ return ouc;
}
/**
- * Destroy the asychronous request.
+ * Destroy the osp_update_callback.
*
* \param[in] env pointer to the thread context
- * \param[in] oar pointer to asychronous request
+ * \param[in] ouc pointer to osp_update_callback
*/
-static void osp_async_request_fini(const struct lu_env *env,
- struct osp_async_request *oar)
+static void osp_update_callback_fini(const struct lu_env *env,
+ struct osp_update_callback *ouc)
{
- LASSERT(list_empty(&oar->oar_list));
+ LASSERT(list_empty(&ouc->ouc_list));
- lu_object_put(env, osp2lu_obj(oar->oar_obj));
- OBD_FREE_PTR(oar);
+ lu_object_put(env, osp2lu_obj(ouc->ouc_obj));
+ OBD_FREE_PTR(ouc);
}
/**
* \retval 0 for success
* \retval negative error number on failure
*/
-static int osp_async_update_interpret(const struct lu_env *env,
- struct ptlrpc_request *req,
- void *arg, int rc)
+static int osp_update_interpret(const struct lu_env *env,
+ struct ptlrpc_request *req, void *arg, int rc)
{
struct object_update_reply *reply = NULL;
- struct osp_async_update_args *oaua = arg;
+ struct osp_update_args *oaua = arg;
struct dt_update_request *dt_update = oaua->oaua_update;
- struct osp_async_request *oar;
- struct osp_async_request *next;
+ struct osp_update_callback *ouc;
+ struct osp_update_callback *next;
int count = 0;
int index = 0;
int rc1 = 0;
rc1 = rc;
}
- list_for_each_entry_safe(oar, next, &dt_update->dur_cb_items,
- oar_list) {
- list_del_init(&oar->oar_list);
+ list_for_each_entry_safe(ouc, next, &dt_update->dur_cb_items,
+ ouc_list) {
+ list_del_init(&ouc->ouc_list);
/* The peer may only have handled some requests (indicated
* by the 'count') in the packaged OUT RPC, we can only get
rc1 = -EINVAL;
}
- oar->oar_interpreter(env, reply, req, oar->oar_obj,
- oar->oar_data, index, rc1);
- osp_async_request_fini(env, oar);
+ if (ouc->ouc_interpreter != NULL)
+ ouc->ouc_interpreter(env, reply, req, ouc->ouc_obj,
+ ouc->ouc_data, index, rc1);
+
+ osp_update_callback_fini(env, ouc);
index++;
}
struct osp_device *osp,
struct dt_update_request *update)
{
- struct osp_async_update_args *args;
- struct ptlrpc_request *req = NULL;
- int rc;
+ struct osp_update_args *args;
+ struct ptlrpc_request *req = NULL;
+ int rc;
rc = osp_prep_update_req(env, osp->opd_obd->u.cli.cl_import,
update->dur_buf.ub_req, &req);
if (rc != 0) {
- struct osp_async_request *oar;
- struct osp_async_request *next;
-
- list_for_each_entry_safe(oar, next,
- &update->dur_cb_items, oar_list) {
- list_del_init(&oar->oar_list);
- oar->oar_interpreter(env, NULL, NULL, oar->oar_obj,
- oar->oar_data, 0, rc);
- osp_async_request_fini(env, oar);
+ struct osp_update_callback *ouc;
+ struct osp_update_callback *next;
+
+ list_for_each_entry_safe(ouc, next,
+ &update->dur_cb_items, ouc_list) {
+ list_del_init(&ouc->ouc_list);
+ if (ouc->ouc_interpreter != NULL)
+ ouc->ouc_interpreter(env, NULL, NULL,
+ ouc->ouc_obj,
+ ouc->ouc_data, 0, rc);
+ osp_update_callback_fini(env, ouc);
}
dt_update_request_destroy(update);
} else {
args->oaua_count = NULL;
args->oaua_waitq = NULL;
args->oaua_flow_control = false;
- req->rq_interpret_reply = osp_async_update_interpret;
+ req->rq_interpret_reply = osp_update_interpret;
ptlrpcd_add_req(req, PDL_POLICY_LOCAL, -1);
}
}
/**
+ * Insert an osp_update_callback into the dt_update_request.
+ *
+ * Insert an osp_update_callback to the dt_update_request. Usually each update
+ * in the dt_update_request will have one correspondent callback, and these
+ * callbacks will be called in rq_interpret_reply.
+ *
+ * \param[in] env pointer to the thread context
+ * \param[in] obj pointer to the operation target object
+ * \param[in] data pointer to the data used by the interpreter
+ * \param[in] interpreter pointer to the interpreter function
+ *
+ * \retval 0 for success
+ * \retval negative error number on failure
+ */
+int osp_insert_update_callback(const struct lu_env *env,
+ struct dt_update_request *update,
+ struct osp_object *obj, void *data,
+ osp_update_interpreter_t interpreter)
+{
+ struct osp_update_callback *ouc;
+
+ ouc = osp_update_callback_init(obj, data, interpreter);
+ if (ouc == NULL)
+ RETURN(-ENOMEM);
+
+ list_add_tail(&ouc->ouc_list, &update->dur_cb_items);
+
+ return 0;
+}
+
+/**
* Insert an asynchronous idempotent request to the shared request queue that
* is attached to the osp_device.
*
int osp_insert_async_request(const struct lu_env *env, enum update_type op,
struct osp_object *obj, int count,
__u16 *lens, const void **bufs, void *data,
- osp_async_request_interpreter_t interpreter)
+ osp_update_interpreter_t interpreter)
{
- struct osp_async_request *oar;
struct osp_device *osp = lu2osp_dev(osp2lu_obj(obj)->lo_dev);
struct dt_update_request *update;
int rc = 0;
ENTRY;
- oar = osp_async_request_init(obj, data, interpreter);
- if (oar == NULL)
- RETURN(-ENOMEM);
-
update = osp_find_or_create_async_update_request(osp);
if (IS_ERR(update))
- GOTO(out, rc = PTR_ERR(update));
+ RETURN(PTR_ERR(update));
again:
/* The queue is full. */
rc = osp_unplug_async_request(env, osp, update);
mutex_lock(&osp->opd_async_requests_mutex);
if (rc != 0)
- GOTO(out, rc);
+ RETURN(rc);
update = osp_find_or_create_async_update_request(osp);
if (IS_ERR(update))
- GOTO(out, rc = PTR_ERR(update));
+ RETURN(PTR_ERR(update));
goto again;
}
- if (rc == 0)
- list_add_tail(&oar->oar_list, &update->dur_cb_items);
+ rc = osp_insert_update_callback(env, update, obj, data, interpreter);
- GOTO(out, rc);
+ RETURN(rc);
+}
-out:
- if (rc != 0)
- osp_async_request_fini(env, oar);
+int osp_trans_update_request_create(struct thandle *th)
+{
+ struct osp_thandle *oth = thandle_to_osp_thandle(th);
+ struct dt_update_request *update;
- return rc;
-}
+ if (oth->ot_dur != NULL)
+ return 0;
+ update = dt_update_request_create(th->th_dev);
+ if (IS_ERR(update)) {
+ th->th_result = PTR_ERR(update);
+ return PTR_ERR(update);
+ }
+
+ oth->ot_dur = update;
+ return 0;
+}
/**
* The OSP layer dt_device_operations::dt_trans_create() interface
* to create a transaction.
{
struct osp_thandle *oth;
struct thandle *th = NULL;
- struct dt_update_request *update;
ENTRY;
OBD_ALLOC_PTR(oth);
th->th_dev = d;
th->th_tags = LCT_TX_HANDLE;
- update = dt_update_request_create(d);
- if (IS_ERR(update)) {
- OBD_FREE_PTR(oth);
- RETURN(ERR_CAST(update));
- }
-
- oth->ot_dur = update;
- oth->ot_send_updates_after_local_trans = false;
-
RETURN(th);
}
*/
int osp_remote_sync(const struct lu_env *env, struct osp_device *osp,
struct dt_update_request *dt_update,
- struct ptlrpc_request **reqp, bool rpc_lock)
+ struct ptlrpc_request **reqp)
{
struct obd_import *imp = osp->opd_obd->u.cli.cl_import;
struct ptlrpc_request *req = NULL;
/* Note: some dt index api might return non-zero result here, like
* osd_index_ea_lookup, so we should only check rc < 0 here */
- if (rpc_lock)
- osp_get_rpc_lock(osp);
rc = ptlrpc_queue_wait(req);
- if (rpc_lock)
- osp_put_rpc_lock(osp);
if (rc < 0) {
ptlrpc_req_finished(req);
dt_update->dur_rc = rc;
/**
* Trigger the request for remote updates.
*
- * If the transaction is not a remote one or it is required to be sync mode
- * (th->th_sync is set), then it will be sent synchronously; otherwise, the
- * RPC will be sent asynchronously.
+ * If th_sync is set, then the request will be sent synchronously,
+ * otherwise, the RPC will be sent asynchronously.
*
* Please refer to osp_trans_create() for transaction type.
*
* \param[in] osp pointer to the OSP device
* \param[in] dt_update pointer to the dt_update_request
* \param[in] th pointer to the transaction handler
- * \param[in] flow_control whether need to control the flow
+ * \param[out] sent whether the RPC has been sent
*
* \retval 0 for success
* \retval negative error number on failure
*/
static int osp_trans_trigger(const struct lu_env *env, struct osp_device *osp,
struct dt_update_request *dt_update,
- struct thandle *th, bool flow_control)
+ struct thandle *th, int *sent)
{
+ struct osp_update_args *args;
+ struct ptlrpc_request *req;
int rc = 0;
+ ENTRY;
- if (is_only_remote_trans(th) && !th->th_sync) {
- struct osp_async_update_args *args;
- struct ptlrpc_request *req;
-
- rc = osp_prep_update_req(env, osp->opd_obd->u.cli.cl_import,
- dt_update->dur_buf.ub_req, &req);
- if (rc != 0)
- return rc;
- down_read(&osp->opd_async_updates_rwsem);
-
- args = ptlrpc_req_async_args(req);
- args->oaua_update = dt_update;
- args->oaua_count = &osp->opd_async_updates_count;
- args->oaua_waitq = &osp->opd_syn_barrier_waitq;
- args->oaua_flow_control = flow_control;
- req->rq_interpret_reply =
- osp_async_update_interpret;
+ rc = osp_prep_update_req(env, osp->opd_obd->u.cli.cl_import,
+ dt_update->dur_buf.ub_req, &req);
+ if (rc != 0)
+ RETURN(rc);
- atomic_inc(args->oaua_count);
- up_read(&osp->opd_async_updates_rwsem);
+ *sent = 1;
+ req->rq_interpret_reply = osp_update_interpret;
+ args = ptlrpc_req_async_args(req);
+ args->oaua_update = dt_update;
+ if (is_only_remote_trans(th) && !th->th_sync) {
+ args->oaua_flow_control = true;
+
+ if (!osp->opd_connect_mdt) {
+ down_read(&osp->opd_async_updates_rwsem);
+ args->oaua_count = &osp->opd_async_updates_count;
+ args->oaua_waitq = &osp->opd_syn_barrier_waitq;
+ up_read(&osp->opd_async_updates_rwsem);
+ atomic_inc(args->oaua_count);
+ }
ptlrpcd_add_req(req, PDL_POLICY_LOCAL, -1);
} else {
- rc = osp_remote_sync(env, osp, dt_update, NULL, true);
+ osp_get_rpc_lock(osp);
+ args->oaua_flow_control = false;
+ rc = ptlrpc_queue_wait(req);
+ osp_put_rpc_lock(osp);
+ ptlrpc_req_finished(req);
}
- return rc;
+ RETURN(rc);
}
/**
* to start the transaction.
*
* If the transaction is a remote transaction, then related remote
- * updates will be triggered in the osp_trans_stop(); otherwise the
- * transaction contains both local and remote update(s), then when
- * the OUT RPC will be triggered depends on the operation, and is
- * indicated by the dt_device::tu_sent_after_local_trans, for example:
- *
- * 1) If it is remote create, it will send the remote req after local
- * transaction. i.e. create the object locally first, then insert the
- * remote name entry.
- *
- * 2) If it is remote unlink, it will send the remote req before the
- * local transaction, i.e. delete the name entry remotely first, then
- * destroy the local object.
- *
+ * updates will be triggered in the osp_trans_stop().
* Please refer to osp_trans_create() for transaction type.
*
* \param[in] env pointer to the thread context
int osp_trans_start(const struct lu_env *env, struct dt_device *dt,
struct thandle *th)
{
- struct osp_thandle *oth = thandle_to_osp_thandle(th);
- struct dt_update_request *dt_update;
- int rc = 0;
+ struct osp_thandle *oth = thandle_to_osp_thandle(th);
- dt_update = oth->ot_dur;
- LASSERT(dt_update != NULL);
-
- /* return if there are no updates, */
- if (dt_update->dur_buf.ub_req == NULL ||
- dt_update->dur_buf.ub_req->ourq_count == 0)
- GOTO(out, rc = 0);
-
- /* Note: some updates needs to send before local transaction,
- * some needs to send after local transaction.
- *
- * If the transaction only includes remote updates, it will
- * send updates to remote MDT in osp_trans_stop.
- *
- * If it is remote create, it will send the remote req after
- * local transaction. i.e. create the object locally first,
- * then insert the name entry.
- *
- * If it is remote unlink, it will send the remote req before
- * the local transaction, i.e. delete the name entry remote
- * first, then destroy the local object. */
- if (!is_only_remote_trans(th) &&
- !oth->ot_send_updates_after_local_trans)
- rc = osp_trans_trigger(env, dt2osp_dev(dt), dt_update, th,
- false);
-
-out:
/* For remote thandle, if there are local thandle, start it here*/
- if (th->th_top == NULL && oth->ot_storage_th != NULL)
- rc = dt_trans_start(env, oth->ot_storage_th->th_dev,
- oth->ot_storage_th);
-
- return rc;
+ if (is_only_remote_trans(th) && oth->ot_storage_th != NULL)
+ return dt_trans_start(env, oth->ot_storage_th->th_dev,
+ oth->ot_storage_th);
+ return 0;
}
/**
* The OSP layer dt_device_operations::dt_trans_stop() interface
* to stop the transaction.
*
- * If the transaction is a remote transaction, or the update handler
- * is marked as 'tu_sent_after_local_trans', then related remote
+ * If the transaction is a remote transaction, related remote
* updates will be triggered here via osp_trans_trigger().
*
* For synchronous mode update or any failed update, the request
int osp_trans_stop(const struct lu_env *env, struct dt_device *dt,
struct thandle *th)
{
-
struct osp_thandle *oth = thandle_to_osp_thandle(th);
struct dt_update_request *dt_update;
int rc = 0;
- bool keep_dt_update = false;
+ int sent = 0;
ENTRY;
- dt_update = oth->ot_dur;
- LASSERT(dt_update != NULL);
- LASSERT(dt_update != LP_POISON);
-
/* For remote transaction, if there is local storage thandle,
* stop it first */
if (oth->ot_storage_th != NULL && th->th_top == NULL) {
oth->ot_storage_th);
oth->ot_storage_th = NULL;
}
+
+ dt_update = oth->ot_dur;
+ if (dt_update == NULL)
+ GOTO(out, rc);
+
+ LASSERT(dt_update != LP_POISON);
+
/* If there are no updates, destroy dt_update and thandle */
if (dt_update->dur_buf.ub_req == NULL ||
- dt_update->dur_buf.ub_req->ourq_count == 0)
+ dt_update->dur_buf.ub_req->ourq_count == 0) {
+ dt_update_request_destroy(dt_update);
GOTO(out, rc);
+ }
if (is_only_remote_trans(th) && !th->th_sync) {
struct osp_device *osp = dt2osp_dev(th->th_dev);
struct client_obd *cli = &osp->opd_obd->u.cli;
- if (th->th_result != 0) {
- rc = th->th_result;
+ rc = obd_get_request_slot(cli);
+ if (rc != 0)
GOTO(out, rc);
- }
- rc = obd_get_request_slot(cli);
if (!osp->opd_imp_active || !osp->opd_imp_connected) {
- if (rc == 0)
- obd_put_request_slot(cli);
- rc = -ENOTCONN;
+ obd_put_request_slot(cli);
+ GOTO(out, rc = -ENOTCONN);
}
- if (rc != 0)
- GOTO(out, rc);
rc = osp_trans_trigger(env, dt2osp_dev(dt),
- dt_update, th, true);
+ dt_update, th, &sent);
if (rc != 0)
obd_put_request_slot(cli);
- else
- keep_dt_update = true;
} else {
- if (oth->ot_send_updates_after_local_trans ||
- (is_only_remote_trans(th) && th->th_sync))
- rc = osp_trans_trigger(env, dt2osp_dev(dt), dt_update,
- th, false);
- rc = dt_update->dur_rc;
+ rc = osp_trans_trigger(env, dt2osp_dev(dt), dt_update,
+ th, &sent);
}
out:
- if (!keep_dt_update)
+ /* If RPC is triggered successfully, dt_update will be freed in
+ * osp_update_interpreter() */
+ if (rc != 0 && dt_update != NULL && sent == 0) {
+ struct osp_update_callback *ouc;
+ struct osp_update_callback *next;
+
+ list_for_each_entry_safe(ouc, next, &dt_update->dur_cb_items,
+ ouc_list) {
+ list_del_init(&ouc->ouc_list);
+ if (ouc->ouc_interpreter != NULL)
+ ouc->ouc_interpreter(env, NULL, NULL,
+ ouc->ouc_obj,
+ ouc->ouc_data, 0, rc);
+ osp_update_callback_fini(env, ouc);
+ }
+
dt_update_request_destroy(dt_update);
+ }
+
OBD_FREE_PTR(oth);
RETURN(rc);