#include <linux/lustre_mgmt.h>
#include <linux/lustre_dlm.h>
#include <linux/lustre_net.h>
+/* @priority: if non-zero, move the selected to the list head
+ * @nocreate: if non-zero, only search in existed connections
+ */
+static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid,
+ int priority, int nocreate)
+{
+ struct ptlrpc_connection *ptlrpc_conn;
+ struct obd_import_conn *imp_conn = NULL, *item;
+ int rc = 0;
+ ENTRY;
+
+ LASSERT(!(nocreate && !priority));
+
+ ptlrpc_conn = ptlrpc_uuid_to_connection(uuid);
+ if (!ptlrpc_conn) {
+ CERROR("can't find connection %s\n", uuid->uuid);
+ RETURN (-EINVAL);
+ }
+
+ if (!nocreate) {
+ OBD_ALLOC(imp_conn, sizeof(*imp_conn));
+ if (!imp_conn) {
+ CERROR("fail to alloc memory\n");
+ GOTO(out_put, rc = -ENOMEM);
+ }
+ }
+
+ spin_lock(&imp->imp_lock);
+ list_for_each_entry(item, &imp->imp_conn_list, oic_item) {
+ if (obd_uuid_equals(uuid, &item->oic_uuid)) {
+ if (priority) {
+ list_del(&item->oic_item);
+ list_add(&item->oic_item, &imp->imp_conn_list);
+ item->oic_last_attempt = 0;
+ }
+ CDEBUG(D_HA, "imp %p@%s: find existed conn %s%s\n",
+ imp, imp->imp_obd->obd_name, uuid->uuid,
+ (priority ? ", move to head." : ""));
+ spin_unlock(&imp->imp_lock);
+ GOTO(out_free, rc = 0);
+ }
+ }
+ /* not found */
+ if (!nocreate) {
+ imp_conn->oic_conn = ptlrpc_conn;
+ imp_conn->oic_uuid = *uuid;
+ imp_conn->oic_last_attempt = 0;
+ if (priority)
+ list_add(&imp_conn->oic_item, &imp->imp_conn_list);
+ else
+ list_add_tail(&imp_conn->oic_item, &imp->imp_conn_list);
+ CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n",
+ imp, imp->imp_obd->obd_name, uuid->uuid,
+ (priority ? "head" : "tail"));
+ } else
+ rc = -ENOENT;
+
+ spin_unlock(&imp->imp_lock);
+ RETURN(0);
+out_free:
+ if (imp_conn)
+ OBD_FREE(imp_conn, sizeof(*imp_conn));
+out_put:
+ ptlrpc_put_connection(ptlrpc_conn);
+ RETURN(rc);
+}
+
+int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid)
+{
+ return import_set_conn(imp, uuid, 1, 1);
+}
+
+int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
+ int priority)
+{
+ return import_set_conn(imp, uuid, priority, 0);
+}
+
+int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
+{
+ struct obd_import_conn *imp_conn;
+ struct obd_export *dlmexp;
+ int rc = -ENOENT;
+ ENTRY;
+
+ spin_lock(&imp->imp_lock);
+ if (list_empty(&imp->imp_conn_list)) {
+ LASSERT(!imp->imp_conn_current);
+ LASSERT(!imp->imp_connection);
+ GOTO(out, rc);
+ }
+
+ list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
+ if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid))
+ continue;
+ LASSERT(imp_conn->oic_conn);
+
+ /* is current conn? */
+ if (imp_conn == imp->imp_conn_current) {
+ LASSERT(imp_conn->oic_conn == imp->imp_connection);
+
+ if (imp->imp_state != LUSTRE_IMP_CLOSED &&
+ imp->imp_state != LUSTRE_IMP_DISCON) {
+ CERROR("can't remove current connection\n");
+ GOTO(out, rc = -EBUSY);
+ }
+
+ ptlrpc_put_connection(imp->imp_connection);
+ imp->imp_connection = NULL;
+
+ dlmexp = class_conn2export(&imp->imp_dlm_handle);
+ if (dlmexp && dlmexp->exp_connection) {
+ LASSERT(dlmexp->exp_connection ==
+ imp_conn->oic_conn);
+ ptlrpc_put_connection(dlmexp->exp_connection);
+ dlmexp->exp_connection = NULL;
+ }
+ }
+
+ list_del(&imp_conn->oic_item);
+ ptlrpc_put_connection(imp_conn->oic_conn);
+ OBD_FREE(imp_conn, sizeof(*imp_conn));
+ CDEBUG(D_HA, "imp %p@%s: remove connection %s\n",
+ imp, imp->imp_obd->obd_name, uuid->uuid);
+ rc = 0;
+ break;
+ }
+out:
+ spin_unlock(&imp->imp_lock);
+ if (rc == -ENOENT)
+ CERROR("connection %s not found\n", uuid->uuid);
+ RETURN(rc);
+}
int client_obd_setup(struct obd_device *obddev, obd_count len, void *buf)
{
- struct ptlrpc_connection *conn;
struct lustre_cfg* lcfg = buf;
struct client_obd *cli = &obddev->u.cli;
struct obd_import *imp;
int rq_portal, rp_portal, connect_op;
char *name = obddev->obd_type->typ_name;
char *mgmt_name = NULL;
- int rc = 0;
+ int rc;
struct obd_device *mgmt_obd;
mgmtcli_register_for_events_t register_f;
ENTRY;
sema_init(&cli->cl_sem, 1);
cli->cl_conn_count = 0;
- memcpy(server_uuid.uuid, lcfg->lcfg_inlbuf2, MIN(lcfg->lcfg_inllen2,
- sizeof(server_uuid)));
+ memcpy(server_uuid.uuid, lcfg->lcfg_inlbuf2,
+ min_t(unsigned int, lcfg->lcfg_inllen2, sizeof(server_uuid)));
- init_MUTEX(&cli->cl_dirty_sem);
cli->cl_dirty = 0;
- cli->cl_dirty_granted = 0;
- cli->cl_dirty_max = 64*1024*1024; /* some default */
- cli->cl_ost_can_grant = 1;
+ cli->cl_avail_grant = 0;
+ /* FIXME: should limit this for the sum of all cl_dirty_max */
+ cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024;
+ if (cli->cl_dirty_max >> PAGE_SHIFT > num_physpages / 8)
+ cli->cl_dirty_max = num_physpages << (PAGE_SHIFT - 3);
INIT_LIST_HEAD(&cli->cl_cache_waiters);
INIT_LIST_HEAD(&cli->cl_loi_ready_list);
+ INIT_LIST_HEAD(&cli->cl_loi_write_list);
+ INIT_LIST_HEAD(&cli->cl_loi_read_list);
spin_lock_init(&cli->cl_loi_list_lock);
- cli->cl_brw_in_flight = 0;
+ cli->cl_r_in_flight = 0;
+ cli->cl_w_in_flight = 0;
spin_lock_init(&cli->cl_read_rpc_hist.oh_lock);
spin_lock_init(&cli->cl_write_rpc_hist.oh_lock);
spin_lock_init(&cli->cl_read_page_hist.oh_lock);
spin_lock_init(&cli->cl_write_page_hist.oh_lock);
- cli->cl_max_pages_per_rpc = PTL_MD_MAX_PAGES;
- cli->cl_max_rpcs_in_flight = 8;
+
+ if (num_physpages <= 32768) { /* <= 128 MB */
+ cli->cl_max_pages_per_rpc = PTLRPC_MAX_BRW_PAGES / 3;
+ cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT / 3;
+ } else {
+ cli->cl_max_pages_per_rpc = PTLRPC_MAX_BRW_PAGES;
+ cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT;
+ }
+
- ldlm_get_ref();
+ rc = ldlm_get_ref();
if (rc) {
CERROR("ldlm_get_ref failed: %d\n", rc);
GOTO(err, rc);
}
- conn = ptlrpc_uuid_to_connection(&server_uuid);
- if (conn == NULL)
- GOTO(err_ldlm, rc = -ENOENT);
-
ptlrpc_init_client(rq_portal, rp_portal, name,
&obddev->obd_ldlm_client);
imp = class_new_import();
- if (imp == NULL) {
- ptlrpc_put_connection(conn);
+ if (imp == NULL)
GOTO(err_ldlm, rc = -ENOENT);
- }
- imp->imp_connection = conn;
imp->imp_client = &obddev->obd_ldlm_client;
imp->imp_obd = obddev;
imp->imp_connect_op = connect_op;
imp->imp_generation = 0;
+ imp->imp_initial_recov = 1;
INIT_LIST_HEAD(&imp->imp_pinger_chain);
memcpy(imp->imp_target_uuid.uuid, lcfg->lcfg_inlbuf1,
lcfg->lcfg_inllen1);
class_import_put(imp);
+ rc = client_import_add_conn(imp, &server_uuid, 1);
+ if (rc) {
+ CERROR("can't add initial connection\n");
+ GOTO(err_import, rc);
+ }
+
cli->cl_import = imp;
cli->cl_max_mds_easize = sizeof(struct lov_mds_md);
cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie);
int client_connect_import(struct lustre_handle *dlm_handle,
struct obd_device *obd,
- struct obd_uuid *cluuid)
+ struct obd_uuid *cluuid,
+ unsigned long connect_flags)
{
struct client_obd *cli = &obd->u.cli;
struct obd_import *imp = cli->cl_import;
GOTO(out_disco, rc = -ENOMEM);
imp->imp_dlm_handle = *dlm_handle;
- imp->imp_state = LUSTRE_IMP_DISCON;
+ rc = ptlrpc_init_import(imp);
+ if (rc != 0)
+ GOTO(out_ldlm, rc);
- rc = ptlrpc_connect_import(imp);
+ imp->imp_connect_flags = connect_flags;
+ rc = ptlrpc_connect_import(imp, NULL);
if (rc != 0) {
LASSERT (imp->imp_state == LUSTRE_IMP_DISCON);
GOTO(out_ldlm, rc);
}
-
- LASSERT (imp->imp_state == LUSTRE_IMP_FULL);
-
- exp->exp_connection = ptlrpc_connection_addref(imp->imp_connection);
-
- if (imp->imp_replayable) {
- CDEBUG(D_HA, "connected to replayable target: %s\n",
- imp->imp_target_uuid.uuid);
- ptlrpc_pinger_add_import(imp);
- }
-
- CDEBUG(D_HA, "local import: %p, remote handle: "LPX64"\n", imp,
- imp->imp_remote_handle.cookie);
-
+ LASSERT(exp->exp_connection);
+ ptlrpc_pinger_add_import(imp);
EXIT;
if (rc) {
return rc;
}
-int client_disconnect_export(struct obd_export *exp, int failover)
+int client_disconnect_export(struct obd_export *exp, unsigned long flags)
{
struct obd_device *obd = class_exp2obd(exp);
struct client_obd *cli = &obd->u.cli;
/* Yeah, obd_no_recov also (mainly) means "forced shutdown". */
if (obd->obd_no_recov)
- ptlrpc_set_import_active(imp, 0);
+ ptlrpc_invalidate_import(imp, 0);
else
rc = ptlrpc_disconnect_import(imp);
- imp->imp_state = LUSTRE_IMP_NEW;
-
EXIT;
out_no_disconnect:
err = class_disconnect(exp, 0);
* -------------------------------------------------------------------------- */
int target_handle_reconnect(struct lustre_handle *conn, struct obd_export *exp,
- struct obd_uuid *cluuid)
+ struct obd_uuid *cluuid, int initial_conn)
{
- if (exp->exp_connection) {
+ if (exp->exp_connection && !initial_conn) {
struct lustre_handle *hdl;
hdl = &exp->exp_imp_reverse->imp_remote_handle;
/* Might be a re-connect after a partition. */
RETURN(0);
}
-int target_handle_connect(struct ptlrpc_request *req, svc_handler_t handler)
+static char nidstr[PTL_NALFMT_SIZE];
+int target_handle_connect(struct ptlrpc_request *req)
{
+ unsigned long connect_flags = 0, *cfp;
struct obd_device *target;
struct obd_export *export = NULL;
struct obd_import *revimp;
struct obd_uuid remote_uuid;
struct list_head *p;
char *str, *tmp;
- int rc = 0, abort_recovery;
+ int rc = 0;
+ unsigned long flags;
+ int initial_conn = 0;
+ char peer_str[PTL_NALFMT_SIZE];
ENTRY;
+ OBD_RACE(OBD_FAIL_TGT_CONN_RACE);
+
LASSERT_REQSWAB (req, 0);
str = lustre_msg_string(req->rq_reqmsg, 0, sizeof(tgtuuid) - 1);
if (str == NULL) {
if (!target) {
target = class_name2obd(str);
}
-
+
if (!target || target->obd_stopping || !target->obd_set_up) {
- CERROR("UUID '%s' is not available for connect\n", str);
+ CERROR("UUID '%s' is not available for connect from NID %s\n",
+ str, ptlrpc_peernid2str(&req->rq_peer, nidstr));
GOTO(out, rc = -ENODEV);
}
obd_str2uuid (&cluuid, str);
/* XXX extract a nettype and format accordingly */
- snprintf(remote_uuid.uuid, sizeof remote_uuid,
- "NET_"LPX64"_UUID", req->rq_peer.peer_nid);
-
- spin_lock_bh(&target->obd_processing_task_lock);
- abort_recovery = target->obd_abort_recovery;
- spin_unlock_bh(&target->obd_processing_task_lock);
- if (abort_recovery)
- target_abort_recovery(target);
+ switch (sizeof(ptl_nid_t)) {
+ /* NB the casts only avoid compiler warnings */
+ case 8:
+ snprintf(remote_uuid.uuid, sizeof remote_uuid,
+ "NET_"LPX64"_UUID", (__u64)req->rq_peer.peer_id.nid);
+ break;
+ case 4:
+ snprintf(remote_uuid.uuid, sizeof remote_uuid,
+ "NET_%x_UUID", (__u32)req->rq_peer.peer_id.nid);
+ break;
+ default:
+ LBUG();
+ }
tmp = lustre_msg_buf(req->rq_reqmsg, 2, sizeof conn);
if (tmp == NULL)
memcpy(&conn, tmp, sizeof conn);
+ cfp = lustre_msg_buf(req->rq_reqmsg, 3, sizeof(unsigned long));
+ LASSERT(cfp != NULL);
+ connect_flags = *cfp;
+
rc = lustre_pack_reply(req, 0, NULL, NULL);
if (rc)
GOTO(out, rc);
-
+
+ if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL)
+ initial_conn = 1;
+
/* lctl gets a backstage, all-access pass. */
if (obd_uuid_equals(&cluuid, &target->obd_uuid))
goto dont_check_exports;
spin_unlock(&target->obd_dev_lock);
LASSERT(export->exp_obd == target);
- rc = target_handle_reconnect(&conn, export, &cluuid);
+ rc = target_handle_reconnect(&conn, export, &cluuid,
+ initial_conn);
break;
}
export = NULL;
/* If we found an export, we already unlocked. */
if (!export) {
spin_unlock(&target->obd_dev_lock);
- } else if (req->rq_reqmsg->conn_cnt == 1) {
+ } else if (req->rq_export == NULL &&
+ atomic_read(&export->exp_rpc_count) > 0) {
+ CWARN("%s: refuse connection from %s/%s to 0x%p/%d\n",
+ target->obd_name, cluuid.uuid,
+ ptlrpc_peernid2str(&req->rq_peer, peer_str),
+ export, atomic_read(&export->exp_refcount));
+ GOTO(out, rc = -EBUSY);
+ } else if (req->rq_export != NULL &&
+ atomic_read(&export->exp_rpc_count) > 1) {
+ CWARN("%s: refuse reconnection from %s@%s to 0x%p/%d\n",
+ target->obd_name, cluuid.uuid,
+ ptlrpc_peernid2str(&req->rq_peer, peer_str),
+ export, atomic_read(&export->exp_rpc_count));
+ GOTO(out, rc = -EBUSY);
+ }
+ else if (req->rq_reqmsg->conn_cnt == 1 && !initial_conn) {
CERROR("%s reconnected with 1 conn_cnt; cookies not random?\n",
cluuid.uuid);
GOTO(out, rc = -EALREADY);
/* Tell the client if we're in recovery. */
/* If this is the first client, start the recovery timer */
+ CWARN("%s: connection from %s@%s/%lu %s\n", target->obd_name, cluuid.uuid,
+ ptlrpc_peernid2str(&req->rq_peer, peer_str), *cfp,
+ target->obd_recovering ? "(recovering)" : "");
if (target->obd_recovering) {
lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING);
- target_start_recovery_timer(target, handler);
+ target_start_recovery_timer(target);
}
-
+#if 0
/* Tell the client if we support replayable requests */
if (target->obd_replayable)
lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
-
+#endif
if (export == NULL) {
if (target->obd_recovering) {
- CERROR("denying connection for new client %s: "
- "%d clients in recovery for %lds\n", cluuid.uuid,
+ CERROR("%s denying connection for new client %s@%s: "
+ "%d clients in recovery for %lds\n", target->obd_name,
+ cluuid.uuid,
+ ptlrpc_peernid2str(&req->rq_peer, peer_str),
target->obd_recoverable_clients,
(target->obd_recovery_timer.expires-jiffies)/HZ);
rc = -EBUSY;
} else {
dont_check_exports:
- rc = obd_connect(&conn, target, &cluuid);
+ rc = obd_connect(&conn, target, &cluuid, connect_flags);
}
}
+ /* Tell the client if we support replayable requests */
+ if (target->obd_replayable)
+ lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE);
/* If all else goes well, this is our RPC return code. */
req->rq_status = 0;
if (rc && rc != EALREADY)
GOTO(out, rc);
- /* XXX track this all the time? */
- if (target->obd_recovering) {
- target->obd_connected_clients++;
- }
-
req->rq_repmsg->handle = conn;
/* If the client and the server are the same node, we will already
export = req->rq_export = class_conn2export(&conn);
LASSERT(export != NULL);
- if (req->rq_connection != NULL)
- ptlrpc_put_connection(req->rq_connection);
+ spin_lock_irqsave(&export->exp_lock, flags);
+ if (initial_conn) {
+ req->rq_repmsg->conn_cnt = export->exp_conn_cnt + 1;
+ } else if (export->exp_conn_cnt >= req->rq_reqmsg->conn_cnt) {
+ CERROR("%s@%s: already connected at a higher conn_cnt: %d > %d\n",
+ cluuid.uuid, ptlrpc_peernid2str(&req->rq_peer, peer_str),
+ export->exp_conn_cnt,
+ req->rq_reqmsg->conn_cnt);
+ spin_unlock_irqrestore(&export->exp_lock, flags);
+ GOTO(out, rc = -EALREADY);
+ }
+ export->exp_conn_cnt = req->rq_reqmsg->conn_cnt;
+ spin_unlock_irqrestore(&export->exp_lock, flags);
+
+ /* request from liblustre? */
+ if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT)
+ export->exp_libclient = 1;
+
if (export->exp_connection != NULL)
ptlrpc_put_connection(export->exp_connection);
export->exp_connection = ptlrpc_get_connection(&req->rq_peer,
&remote_uuid);
- req->rq_connection = ptlrpc_connection_addref(export->exp_connection);
-
- LASSERT(export->exp_conn_cnt < req->rq_reqmsg->conn_cnt);
- export->exp_conn_cnt = req->rq_reqmsg->conn_cnt;
if (rc == EALREADY) {
/* We indicate the reconnection in a flag, not an error code. */
GOTO(out, rc = 0);
}
+ if (target->obd_recovering) {
+ target->obd_connected_clients++;
+ }
+
memcpy(&conn, lustre_msg_buf(req->rq_reqmsg, 2, sizeof conn),
sizeof conn);
if (export->exp_imp_reverse != NULL)
class_destroy_import(export->exp_imp_reverse);
revimp = export->exp_imp_reverse = class_new_import();
- revimp->imp_connection = ptlrpc_connection_addref(req->rq_connection);
+ revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection);
revimp->imp_client = &export->exp_obd->obd_ldlm_client;
revimp->imp_remote_handle = conn;
revimp->imp_obd = target;
revimp->imp_dlm_fake = 1;
revimp->imp_state = LUSTRE_IMP_FULL;
class_import_put(revimp);
+
+ rc = obd_connect_post(export, connect_flags);
out:
if (rc)
req->rq_status = rc;
int target_handle_disconnect(struct ptlrpc_request *req)
{
+ struct obd_export *exp;
int rc;
ENTRY;
if (rc)
RETURN(rc);
- req->rq_status = obd_disconnect(req->rq_export, 0);
- req->rq_export = NULL;
+ /* keep the rq_export around so we can send the reply */
+ exp = class_export_get(req->rq_export);
+ req->rq_status = obd_disconnect(exp, 0);
RETURN(0);
}
/* We cancel locks at disconnect time, but this will catch any locks
* granted in a race with recovery-induced disconnect. */
- ldlm_cancel_locks_for_export(exp);
+ if (exp->exp_obd->obd_namespace != NULL)
+ ldlm_cancel_locks_for_export(exp);
}
/*
* Recovery functions
*/
-void target_cancel_recovery_timer(struct obd_device *obd)
+struct ptlrpc_request *
+ptlrpc_clone_req( struct ptlrpc_request *orig_req)
{
- del_timer(&obd->obd_recovery_timer);
+ struct ptlrpc_request *copy_req;
+ struct lustre_msg *copy_reqmsg;
+
+ OBD_ALLOC(copy_req, sizeof *copy_req);
+ if (!copy_req)
+ return NULL;
+ OBD_ALLOC(copy_reqmsg, orig_req->rq_reqlen);
+ if (!copy_reqmsg){
+ OBD_FREE(copy_req, sizeof *copy_req);
+ return NULL;
+ }
+
+ memcpy(copy_req, orig_req, sizeof *copy_req);
+ memcpy(copy_reqmsg, orig_req->rq_reqmsg, orig_req->rq_reqlen);
+ /* the copied req takes over the reply state */
+ orig_req->rq_reply_state = NULL;
+
+ copy_req->rq_reqmsg = copy_reqmsg;
+ class_export_get(copy_req->rq_export);
+ INIT_LIST_HEAD(©_req->rq_list);
+
+ return copy_req;
+}
+void ptlrpc_free_clone( struct ptlrpc_request *req)
+{
+ class_export_put(req->rq_export);
+ list_del(&req->rq_list);
+ OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
+ OBD_FREE(req, sizeof *req);
}
-static void abort_delayed_replies(struct obd_device *obd)
+
+
+static void target_release_saved_req(struct ptlrpc_request *req)
+{
+ class_export_put(req->rq_export);
+ OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
+ OBD_FREE(req, sizeof *req);
+}
+
+#ifdef __KERNEL__
+static void target_finish_recovery(struct obd_device *obd)
{
- struct ptlrpc_request *req;
struct list_head *tmp, *n;
+ int rc;
+
+ CWARN("%s: sending delayed replies to recovered clients\n",
+ obd->obd_name);
+
+ ldlm_reprocess_all_ns(obd->obd_namespace);
+
+ /* when recovery finished, cleanup orphans on mds and ost */
+ if (OBT(obd) && OBP(obd, postrecov)) {
+ rc = OBP(obd, postrecov)(obd);
+ if (rc >= 0)
+ CWARN("%s: all clients recovered, %d MDS "
+ "orphans deleted\n", obd->obd_name, rc);
+ else
+ CERROR("postrecov failed %d\n", rc);
+ }
+
+
list_for_each_safe(tmp, n, &obd->obd_delayed_reply_queue) {
+ struct ptlrpc_request *req;
req = list_entry(tmp, struct ptlrpc_request, rq_list);
- DEBUG_REQ(D_ERROR, req, "aborted:");
- req->rq_status = -ENOTCONN;
- req->rq_type = PTL_RPC_MSG_ERR;
- ptlrpc_reply(req);
list_del(&req->rq_list);
- OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
- OBD_FREE(req, sizeof *req);
+ DEBUG_REQ(D_ERROR, req, "delayed:");
+ ptlrpc_reply(req);
+ target_release_saved_req(req);
}
+ obd->obd_recovery_end = LTIME_S(CURRENT_TIME);
+ return;
}
static void abort_recovery_queue(struct obd_device *obd)
list_for_each_safe(tmp, n, &obd->obd_recovery_queue) {
req = list_entry(tmp, struct ptlrpc_request, rq_list);
+ list_del(&req->rq_list);
DEBUG_REQ(D_ERROR, req, "aborted:");
req->rq_status = -ENOTCONN;
req->rq_type = PTL_RPC_MSG_ERR;
DEBUG_REQ(D_ERROR, req,
"packing failed for abort-reply; skipping");
}
- list_del(&req->rq_list);
- class_export_put(req->rq_export);
- OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
- OBD_FREE(req, sizeof *req);
+ target_release_saved_req(req);
}
}
+#endif
-void target_abort_recovery(void *data)
+/* Called from a cleanup function if the device is being cleaned up
+ forcefully. The exports should all have been disconnected already,
+ the only thing left to do is
+ - clear the recovery flags
+ - cancel the timer
+ - free queued requests and replies, but don't send replies
+ Because the obd_stopping flag is set, no new requests should be received.
+
+*/
+void target_cleanup_recovery(struct obd_device *obd)
{
- struct obd_device *obd = data;
- int rc;
+ struct list_head *tmp, *n;
+ struct ptlrpc_request *req;
- CERROR("disconnecting clients and aborting recovery\n");
spin_lock_bh(&obd->obd_processing_task_lock);
if (!obd->obd_recovering) {
spin_unlock_bh(&obd->obd_processing_task_lock);
EXIT;
return;
}
-
obd->obd_recovering = obd->obd_abort_recovery = 0;
-
- wake_up(&obd->obd_next_transno_waitq);
target_cancel_recovery_timer(obd);
spin_unlock_bh(&obd->obd_processing_task_lock);
- class_disconnect_exports(obd, 0);
-
- /* when recovery was abort, cleanup orphans for mds */
- if (OBT(obd) && OBP(obd, postrecov)) {
- rc = OBP(obd, postrecov)(obd);
- if (rc >= 0)
- CWARN("Cleanup %d orphans after recovery was aborted\n", rc);
- else
- CERROR("postrecov failed %d\n", rc);
+ list_for_each_safe(tmp, n, &obd->obd_delayed_reply_queue) {
+ req = list_entry(tmp, struct ptlrpc_request, rq_list);
+ list_del(&req->rq_list);
+ LASSERT (req->rq_reply_state);
+ lustre_free_reply_state(req->rq_reply_state);
+ target_release_saved_req(req);
}
+ list_for_each_safe(tmp, n, &obd->obd_recovery_queue) {
+ req = list_entry(tmp, struct ptlrpc_request, rq_list);
+ list_del(&req->rq_list);
+ LASSERT (req->rq_reply_state == 0);
+ target_release_saved_req(req);
+ }
+}
+
+#ifdef __KERNEL__
+static void target_abort_recovery(void *data)
+{
+ struct obd_device *obd = data;
+
+ LASSERT(!obd->obd_recovering);
+
+ class_disconnect_stale_exports(obd, 0);
+
+ CERROR("%s: recovery period over; disconnecting unfinished clients.\n",
+ obd->obd_name);
- abort_delayed_replies(obd);
abort_recovery_queue(obd);
+ target_finish_recovery(obd);
ptlrpc_run_recovery_over_upcall(obd);
}
+#endif
static void target_recovery_expired(unsigned long castmeharder)
{
struct obd_device *obd = (struct obd_device *)castmeharder;
CERROR("recovery timed out, aborting\n");
spin_lock_bh(&obd->obd_processing_task_lock);
- obd->obd_abort_recovery = 1;
+ if (obd->obd_recovering)
+ obd->obd_abort_recovery = 1;
+
wake_up(&obd->obd_next_transno_waitq);
spin_unlock_bh(&obd->obd_processing_task_lock);
}
-static void reset_recovery_timer(struct obd_device *obd)
+
+/* obd_processing_task_lock should be held */
+void target_cancel_recovery_timer(struct obd_device *obd)
{
- int recovering;
- spin_lock(&obd->obd_dev_lock);
- recovering = obd->obd_recovering;
- spin_unlock(&obd->obd_dev_lock);
+ CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name);
+ del_timer(&obd->obd_recovery_timer);
+}
- if (!recovering)
+#ifdef __KERNEL__
+static void reset_recovery_timer(struct obd_device *obd)
+{
+ spin_lock_bh(&obd->obd_processing_task_lock);
+ if (!obd->obd_recovering) {
+ spin_unlock_bh(&obd->obd_processing_task_lock);
return;
+ }
CDEBUG(D_HA, "timer will expire in %u seconds\n",
OBD_RECOVERY_TIMEOUT / HZ);
mod_timer(&obd->obd_recovery_timer, jiffies + OBD_RECOVERY_TIMEOUT);
+ spin_unlock_bh(&obd->obd_processing_task_lock);
}
-
+#endif
/* Only start it the first time called */
-void target_start_recovery_timer(struct obd_device *obd, svc_handler_t handler)
+void target_start_recovery_timer(struct obd_device *obd)
{
spin_lock_bh(&obd->obd_processing_task_lock);
- if (obd->obd_recovery_handler) {
+ if (!obd->obd_recovering || timer_pending(&obd->obd_recovery_timer)) {
spin_unlock_bh(&obd->obd_processing_task_lock);
return;
}
CWARN("%s: starting recovery timer (%us)\n", obd->obd_name,
OBD_RECOVERY_TIMEOUT / HZ);
- obd->obd_recovery_handler = handler;
obd->obd_recovery_timer.function = target_recovery_expired;
obd->obd_recovery_timer.data = (unsigned long)obd;
- init_timer(&obd->obd_recovery_timer);
+ mod_timer(&obd->obd_recovery_timer, jiffies + OBD_RECOVERY_TIMEOUT);
spin_unlock_bh(&obd->obd_processing_task_lock);
-
- reset_recovery_timer(obd);
}
+#ifdef __KERNEL__
static int check_for_next_transno(struct obd_device *obd)
{
- struct ptlrpc_request *req;
+ struct ptlrpc_request *req = NULL;
int wake_up = 0, connected, completed, queue_len, max;
__u64 next_transno, req_transno;
spin_lock_bh(&obd->obd_processing_task_lock);
- req = list_entry(obd->obd_recovery_queue.next,
- struct ptlrpc_request, rq_list);
+ if (!list_empty(&obd->obd_recovery_queue)) {
+ req = list_entry(obd->obd_recovery_queue.next,
+ struct ptlrpc_request, rq_list);
+ req_transno = req->rq_reqmsg->transno;
+ } else {
+ req_transno = 0;
+ }
+
max = obd->obd_max_recoverable_clients;
- req_transno = req->rq_reqmsg->transno;
connected = obd->obd_connected_clients;
completed = max - obd->obd_recoverable_clients;
queue_len = obd->obd_requests_queued_for_recovery;
next_transno = obd->obd_next_recovery_transno;
+ CDEBUG(D_HA,"max: %d, connected: %d, completed: %d, queue_len: %d, "
+ "req_transno: "LPU64", next_transno: "LPU64"\n",
+ max, connected, completed, queue_len, req_transno, next_transno);
if (obd->obd_abort_recovery) {
CDEBUG(D_HA, "waking for aborted recovery\n");
wake_up = 1;
- } else if (!obd->obd_recovering) {
- CDEBUG(D_HA, "waking for completed recovery (?)\n");
+ } else if (max == completed) {
+ CDEBUG(D_HA, "waking for completed recovery\n");
wake_up = 1;
} else if (req_transno == next_transno) {
CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno);
wake_up = 1;
} else if (queue_len + completed == max) {
+ LASSERT(req->rq_reqmsg->transno >= next_transno);
CDEBUG(D_ERROR,
"waking for skipped transno (skip: "LPD64
", ql: %d, comp: %d, conn: %d, next: "LPD64")\n",
wake_up = 1;
}
spin_unlock_bh(&obd->obd_processing_task_lock);
- LASSERT(req->rq_reqmsg->transno >= next_transno);
+
return wake_up;
}
-static void process_recovery_queue(struct obd_device *obd)
+static struct ptlrpc_request *
+target_next_replay_req(struct obd_device *obd)
{
- struct ptlrpc_request *req;
- int abort_recovery = 0;
struct l_wait_info lwi = { 0 };
- ENTRY;
+ struct ptlrpc_request *req;
- for (;;) {
- spin_lock_bh(&obd->obd_processing_task_lock);
- LASSERT(obd->obd_processing_task == current->pid);
+ CDEBUG(D_HA, "Waiting for transno "LPD64"\n",
+ obd->obd_next_recovery_transno);
+ l_wait_event(obd->obd_next_transno_waitq,
+ check_for_next_transno(obd), &lwi);
+
+ spin_lock_bh(&obd->obd_processing_task_lock);
+ if (obd->obd_abort_recovery) {
+ req = NULL;
+ } else if (!list_empty(&obd->obd_recovery_queue)) {
req = list_entry(obd->obd_recovery_queue.next,
struct ptlrpc_request, rq_list);
+ list_del_init(&req->rq_list);
+ obd->obd_requests_queued_for_recovery--;
+ } else {
+ req = NULL;
+ }
+ spin_unlock_bh(&obd->obd_processing_task_lock);
+ return req;
+}
- if (req->rq_reqmsg->transno != obd->obd_next_recovery_transno) {
- spin_unlock_bh(&obd->obd_processing_task_lock);
- CDEBUG(D_HA, "Waiting for transno "LPD64" (1st is "
- LPD64")\n",
- obd->obd_next_recovery_transno,
- req->rq_reqmsg->transno);
- l_wait_event(obd->obd_next_transno_waitq,
- check_for_next_transno(obd), &lwi);
+static int target_recovery_thread(void *arg)
+{
+ struct obd_device *obd = arg;
+ struct ptlrpc_request *req;
+ struct target_recovery_data *trd = &obd->obd_recovery_data;
+ unsigned long flags;
+ ENTRY;
+
+ kportal_daemonize("tgt-recov");
+
+ SIGNAL_MASK_LOCK(current, flags);
+ sigfillset(¤t->blocked);
+ RECALC_SIGPENDING;
+ SIGNAL_MASK_UNLOCK(current, flags);
+
+ CERROR("%s: started recovery thread pid %d\n", obd->obd_name,
+ current->pid);
+ trd->trd_processing_task = current->pid;
+
+ obd->obd_recovering = 1;
+ complete(&trd->trd_starting);
+
+ while (obd->obd_recovering) {
+ LASSERT(trd->trd_processing_task == current->pid);
+ req = target_next_replay_req(obd);
+ if (req != NULL) {
+ char peer_str[PTL_NALFMT_SIZE];
+ DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s: ",
+ req->rq_reqmsg->transno,
+ ptlrpc_peernid2str(&req->rq_peer, peer_str));
+ (void)trd->trd_recovery_handler(req);
+ obd->obd_replayed_requests++;
+ reset_recovery_timer(obd);
+ /* bug 1580: decide how to properly sync() in recovery*/
+ //mds_fsync_super(mds->mds_sb);
+ ptlrpc_free_clone(req);
spin_lock_bh(&obd->obd_processing_task_lock);
- abort_recovery = obd->obd_abort_recovery;
+ obd->obd_next_recovery_transno++;
spin_unlock_bh(&obd->obd_processing_task_lock);
- if (abort_recovery) {
- target_abort_recovery(obd);
- return;
+ } else {
+ /* recovery is over */
+ spin_lock_bh(&obd->obd_processing_task_lock);
+ obd->obd_recovering = 0;
+ target_cancel_recovery_timer(obd);
+ if (obd->obd_abort_recovery) {
+ obd->obd_abort_recovery = 0;
+ spin_unlock_bh(&obd->obd_processing_task_lock);
+ target_abort_recovery(obd);
+ } else {
+ LASSERT(obd->obd_recoverable_clients == 0);
+ spin_unlock_bh(&obd->obd_processing_task_lock);
+ target_finish_recovery(obd);
}
- continue;
}
- list_del_init(&req->rq_list);
- obd->obd_requests_queued_for_recovery--;
- spin_unlock_bh(&obd->obd_processing_task_lock);
+ }
- DEBUG_REQ(D_HA, req, "processing: ");
- (void)obd->obd_recovery_handler(req);
- obd->obd_replayed_requests++;
- reset_recovery_timer(obd);
- /* bug 1580: decide how to properly sync() in recovery */
- //mds_fsync_super(mds->mds_sb);
- class_export_put(req->rq_export);
- OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
- OBD_FREE(req, sizeof *req);
- spin_lock_bh(&obd->obd_processing_task_lock);
- obd->obd_next_recovery_transno++;
- if (list_empty(&obd->obd_recovery_queue)) {
- obd->obd_processing_task = 0;
- spin_unlock_bh(&obd->obd_processing_task_lock);
- break;
- }
+ trd->trd_processing_task = 0;
+ complete(&trd->trd_finishing);
+ return 0;
+}
+
+int target_start_recovery_thread(struct obd_device *obd, svc_handler_t handler)
+{
+ int rc = 0;
+ struct target_recovery_data *trd = &obd->obd_recovery_data;
+
+ memset(trd, 0, sizeof(*trd));
+ init_completion(&trd->trd_starting);
+ init_completion(&trd->trd_finishing);
+ trd->trd_recovery_handler = handler;
+
+ if (kernel_thread(target_recovery_thread, obd, 0) == 0)
+ wait_for_completion(&trd->trd_starting);
+ else
+ rc = -ECHILD;
+
+ return rc;
+}
+
+void target_stop_recovery_thread(struct obd_device *obd)
+{
+ spin_lock_bh(&obd->obd_processing_task_lock);
+ if (obd->obd_recovery_data.trd_processing_task > 0) {
+ struct target_recovery_data *trd = &obd->obd_recovery_data;
+ CERROR("%s: aborting recovery\n", obd->obd_name);
+ obd->obd_abort_recovery = 1;
+ wake_up(&obd->obd_next_transno_waitq);
+ spin_unlock_bh(&obd->obd_processing_task_lock);
+ wait_for_completion(&trd->trd_finishing);
+ } else {
spin_unlock_bh(&obd->obd_processing_task_lock);
}
- EXIT;
}
+#endif
int target_queue_recovery_request(struct ptlrpc_request *req,
struct obd_device *obd)
struct list_head *tmp;
int inserted = 0;
__u64 transno = req->rq_reqmsg->transno;
- struct ptlrpc_request *saved_req;
- struct lustre_msg *reqmsg;
/* CAVEAT EMPTOR: The incoming request message has been swabbed
* (i.e. buflens etc are in my own byte order), but type-dependent
return 1;
}
- /* XXX If I were a real man, these LBUGs would be sane cleanups. */
- /* XXX just like the request-dup code in queue_final_reply */
- OBD_ALLOC(saved_req, sizeof *saved_req);
- if (!saved_req)
- LBUG();
- OBD_ALLOC(reqmsg, req->rq_reqlen);
- if (!reqmsg)
- LBUG();
-
- spin_lock_bh(&obd->obd_processing_task_lock);
/* If we're processing the queue, we want don't want to queue this
* message.
* Also, if this request has a transno less than the one we're waiting
* for, we should process it now. It could (and currently always will)
* be an open request for a descriptor that was opened some time ago.
+ *
+ * Also, a resent, replayed request that has already been
+ * handled will pass through here and be processed immediately.
*/
- if (obd->obd_processing_task == current->pid ||
+ spin_lock_bh(&obd->obd_processing_task_lock);
+ if (obd->obd_recovery_data.trd_processing_task == current->pid ||
transno < obd->obd_next_recovery_transno) {
/* Processing the queue right now, don't re-add. */
LASSERT(list_empty(&req->rq_list));
spin_unlock_bh(&obd->obd_processing_task_lock);
- OBD_FREE(reqmsg, req->rq_reqlen);
- OBD_FREE(saved_req, sizeof *saved_req);
return 1;
}
+ spin_unlock_bh(&obd->obd_processing_task_lock);
+
+ /* A resent, replayed request that is still on the queue; just drop it.
+ The queued request will handle this. */
+ if ((lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY))
+ == (MSG_RESENT | MSG_REPLAY)) {
+ DEBUG_REQ(D_ERROR, req, "dropping resent queued req");
+ return 0;
+ }
- memcpy(saved_req, req, sizeof *req);
- memcpy(reqmsg, req->rq_reqmsg, req->rq_reqlen);
- req = saved_req;
- req->rq_reqmsg = reqmsg;
- class_export_get(req->rq_export);
- INIT_LIST_HEAD(&req->rq_list);
+ req = ptlrpc_clone_req(req);
+ if (req == NULL)
+ return -ENOMEM;
+
+ spin_lock_bh(&obd->obd_processing_task_lock);
/* XXX O(n^2) */
list_for_each(tmp, &obd->obd_recovery_queue) {
}
obd->obd_requests_queued_for_recovery++;
-
- if (obd->obd_processing_task != 0) {
- /* Someone else is processing this queue, we'll leave it to
- * them.
- */
- wake_up(&obd->obd_next_transno_waitq);
- spin_unlock_bh(&obd->obd_processing_task_lock);
- return 0;
- }
-
- /* Nobody is processing, and we know there's (at least) one to process
- * now, so we'll do the honours.
- */
- obd->obd_processing_task = current->pid;
+ wake_up(&obd->obd_next_transno_waitq);
spin_unlock_bh(&obd->obd_processing_task_lock);
- process_recovery_queue(obd);
return 0;
}
int target_queue_final_reply(struct ptlrpc_request *req, int rc)
{
struct obd_device *obd = target_req2obd(req);
- struct ptlrpc_request *saved_req;
- struct lustre_msg *reqmsg;
- int recovery_done = 0;
- int rc2;
+
+ LASSERT ((rc == 0) == (req->rq_reply_state != NULL));
if (rc) {
/* Just like ptlrpc_error, but without the sending. */
req->rq_type = PTL_RPC_MSG_ERR;
}
+ LASSERT (!req->rq_reply_state->rs_difficult);
LASSERT(list_empty(&req->rq_list));
- /* XXX a bit like the request-dup code in queue_recovery_request */
- OBD_ALLOC(saved_req, sizeof *saved_req);
- if (!saved_req)
- LBUG();
- OBD_ALLOC(reqmsg, req->rq_reqlen);
- if (!reqmsg)
- LBUG();
- memcpy(saved_req, req, sizeof *saved_req);
- memcpy(reqmsg, req->rq_reqmsg, req->rq_reqlen);
- req = saved_req;
- req->rq_reqmsg = reqmsg;
- list_add(&req->rq_list, &obd->obd_delayed_reply_queue);
+
+ req = ptlrpc_clone_req(req);
spin_lock_bh(&obd->obd_processing_task_lock);
- --obd->obd_recoverable_clients;
- recovery_done = (obd->obd_recoverable_clients == 0);
- spin_unlock_bh(&obd->obd_processing_task_lock);
- if (recovery_done) {
- struct list_head *tmp, *n;
- ldlm_reprocess_all_ns(req->rq_export->exp_obd->obd_namespace);
- CWARN("%s: all clients recovered, sending delayed replies\n",
- obd->obd_name);
- obd->obd_recovering = 0;
-
- /* when recovering finished, cleanup orphans for mds */
- if (OBT(obd) && OBP(obd, postrecov)) {
- rc2 = OBP(obd, postrecov)(obd);
- if (rc2 >= 0)
- CWARN("%s: all clients recovered, %d MDS orphans "
- "deleted\n", obd->obd_name, rc2);
- else
- CERROR("postrecov failed %d\n", rc2);
- }
+ list_add(&req->rq_list, &obd->obd_delayed_reply_queue);
- list_for_each_safe(tmp, n, &obd->obd_delayed_reply_queue) {
- req = list_entry(tmp, struct ptlrpc_request, rq_list);
- DEBUG_REQ(D_ERROR, req, "delayed:");
- ptlrpc_reply(req);
- list_del(&req->rq_list);
- OBD_FREE(req->rq_reqmsg, req->rq_reqlen);
- OBD_FREE(req, sizeof *req);
- }
- target_cancel_recovery_timer(obd);
- } else {
+ /* only count the first "replay over" request from each
+ export */
+ if (req->rq_export->exp_replay_needed) {
+ --obd->obd_recoverable_clients;
+ req->rq_export->exp_replay_needed = 0;
CWARN("%s: %d recoverable clients remain\n",
- obd->obd_name, obd->obd_recoverable_clients);
- wake_up(&obd->obd_next_transno_waitq);
+ obd->obd_name, obd->obd_recoverable_clients);
}
-
+ wake_up(&obd->obd_next_transno_waitq);
+ spin_unlock_bh(&obd->obd_processing_task_lock);
return 1;
}
-static void ptlrpc_abort_reply (struct ptlrpc_request *req)
+int
+target_send_reply_msg (struct ptlrpc_request *req, int rc, int fail_id)
{
- /* On return, we must be sure that the ACK callback has either
- * happened or will not happen. Note that the SENT callback will
- * happen come what may since we successfully posted the PUT. */
- int rc;
- struct l_wait_info lwi;
- unsigned long flags;
-
- again:
- /* serialise with ACK callback */
- spin_lock_irqsave (&req->rq_lock, flags);
- if (!req->rq_want_ack) {
- spin_unlock_irqrestore (&req->rq_lock, flags);
- /* The ACK callback has happened already. Although the
- * SENT callback might still be outstanding (yes really) we
- * don't care; this is just like normal completion. */
- return;
- }
- spin_unlock_irqrestore (&req->rq_lock, flags);
-
- /* Have a bash at unlinking the MD. This will fail until the SENT
- * callback has happened since the MD is busy from the PUT. If the
- * ACK still hasn't arrived after then, a successful unlink will
- * ensure the ACK callback never happens. */
- rc = PtlMDUnlink (req->rq_reply_md_h);
- switch (rc) {
- default:
- LBUG ();
- case PTL_OK:
- /* SENT callback happened; ACK callback preempted */
- LASSERT (req->rq_want_ack);
- spin_lock_irqsave (&req->rq_lock, flags);
- req->rq_want_ack = 0;
- spin_unlock_irqrestore (&req->rq_lock, flags);
- return;
- case PTL_INV_MD:
- return;
- case PTL_MD_INUSE:
- /* Still sending or ACK callback in progress: wait until
- * either callback has completed and try again.
- * Actually we can't wait for the SENT callback because
- * there's no state the SENT callback can touch that will
- * allow it to communicate with us! So we just wait here
- * for a short time, effectively polling for the SENT
- * callback by calling PtlMDUnlink() again, to see if it
- * has finished. Note that if the ACK does arrive, its
- * callback wakes us in short order. --eeb */
- lwi = LWI_TIMEOUT (HZ/4, NULL, NULL);
- rc = l_wait_event(req->rq_reply_waitq, !req->rq_want_ack,
- &lwi);
- CDEBUG (D_HA, "Retrying req %p: %d\n", req, rc);
- /* NB go back and test rq_want_ack with locking, to ensure
- * if ACK callback happened, it has completed stopped
- * referencing this req. */
- goto again;
- }
-}
-
-void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
-{
- int i;
- int netrc;
- unsigned long flags;
- struct ptlrpc_req_ack_lock *ack_lock;
- struct l_wait_info lwi = { 0 };
- wait_queue_t commit_wait;
- struct obd_device *obd =
- req->rq_export ? req->rq_export->exp_obd : NULL;
- struct obd_export *exp = NULL;
-
- if (req->rq_export) {
- for (i = 0; i < REQ_MAX_ACK_LOCKS; i++) {
- if (req->rq_ack_locks[i].mode) {
- exp = req->rq_export;
- break;
+ if (OBD_FAIL_CHECK(fail_id | OBD_FAIL_ONCE)) {
+ obd_fail_loc |= OBD_FAIL_ONCE | OBD_FAILED;
+ DEBUG_REQ(D_ERROR, req, "dropping reply");
+ /* NB this does _not_ send with ACK disabled, to simulate
+ * sending OK, but timing out for the ACK */
+ if (req->rq_reply_state != NULL) {
+ if (!req->rq_reply_state->rs_difficult) {
+ lustre_free_reply_state (req->rq_reply_state);
+ req->rq_reply_state = NULL;
+ } else {
+ struct ptlrpc_service *svc =
+ req->rq_rqbd->rqbd_srv_ni->sni_service;
+ atomic_inc(&svc->srv_outstanding_replies);
}
}
+ return (-ECOMM);
}
- if (exp) {
- exp->exp_outstanding_reply = req;
- spin_lock_irqsave (&req->rq_lock, flags);
- req->rq_want_ack = 1;
- spin_unlock_irqrestore (&req->rq_lock, flags);
- }
-
- if (!OBD_FAIL_CHECK(fail_id | OBD_FAIL_ONCE)) {
- if (rc == 0) {
- DEBUG_REQ(D_NET, req, "sending reply");
- netrc = ptlrpc_reply(req);
- } else if (rc == -ENOTCONN) {
- DEBUG_REQ(D_HA, req, "processing error (%d)", rc);
- netrc = ptlrpc_error(req);
- } else {
- DEBUG_REQ(D_ERROR, req, "processing error (%d)", rc);
- netrc = ptlrpc_error(req);
- }
+ if (rc) {
+ req->rq_status = rc;
+ return (ptlrpc_error(req));
} else {
- obd_fail_loc |= OBD_FAIL_ONCE | OBD_FAILED;
- DEBUG_REQ(D_ERROR, req, "dropping reply");
- if (req->rq_repmsg) {
- OBD_FREE(req->rq_repmsg, req->rq_replen);
- req->rq_repmsg = NULL;
- }
- init_waitqueue_head(&req->rq_reply_waitq);
- netrc = 0;
+ DEBUG_REQ(D_NET, req, "sending reply");
}
+
+ return (ptlrpc_send_reply(req, 1));
+}
- /* a failed send simulates the callbacks */
- LASSERT(netrc == 0 || req->rq_want_ack == 0);
- if (exp == NULL) {
- LASSERT(req->rq_want_ack == 0);
+void
+target_send_reply(struct ptlrpc_request *req, int rc, int fail_id)
+{
+ int netrc;
+ unsigned long flags;
+ struct ptlrpc_reply_state *rs;
+ struct obd_device *obd;
+ struct obd_export *exp;
+ struct ptlrpc_srv_ni *sni;
+ struct ptlrpc_service *svc;
+
+ sni = req->rq_rqbd->rqbd_srv_ni;
+ svc = sni->sni_service;
+
+ rs = req->rq_reply_state;
+ if (rs == NULL || !rs->rs_difficult) {
+ /* The easy case; no notifiers and reply_out_callback()
+ * cleans up (i.e. we can't look inside rs after a
+ * successful send) */
+ netrc = target_send_reply_msg (req, rc, fail_id);
+
+ LASSERT (netrc == 0 || req->rq_reply_state == NULL);
return;
}
- LASSERT(obd != NULL);
-
- init_waitqueue_entry(&commit_wait, current);
- add_wait_queue(&obd->obd_commit_waitq, &commit_wait);
- rc = l_wait_event(req->rq_reply_waitq,
- !req->rq_want_ack || req->rq_resent ||
- req->rq_transno <= obd->obd_last_committed, &lwi);
- remove_wait_queue(&obd->obd_commit_waitq, &commit_wait);
-
- spin_lock_irqsave (&req->rq_lock, flags);
- /* If we got here because the ACK callback ran, this acts as a
- * barrier to ensure the callback completed the wakeup. */
- spin_unlock_irqrestore (&req->rq_lock, flags);
-
- /* If we committed the transno already, then we might wake up before
- * the ack arrives. We need to stop waiting for the ack before we can
- * reuse this request structure. We are guaranteed by this point that
- * this cannot abort the sending of the actual reply.*/
- ptlrpc_abort_reply(req);
-
- if (req->rq_resent) {
- DEBUG_REQ(D_HA, req, "resent: not cancelling locks");
- return;
+
+ /* must be an export if locks saved */
+ LASSERT (req->rq_export != NULL);
+ /* req/reply consistent */
+ LASSERT (rs->rs_srv_ni == sni);
+
+ /* "fresh" reply */
+ LASSERT (!rs->rs_scheduled);
+ LASSERT (!rs->rs_scheduled_ever);
+ LASSERT (!rs->rs_handled);
+ LASSERT (!rs->rs_on_net);
+ LASSERT (rs->rs_export == NULL);
+ LASSERT (list_empty(&rs->rs_obd_list));
+ LASSERT (list_empty(&rs->rs_exp_list));
+
+ exp = class_export_get (req->rq_export);
+ obd = exp->exp_obd;
+
+ /* disable reply scheduling onto srv_reply_queue while I'm setting up */
+ rs->rs_scheduled = 1;
+ rs->rs_on_net = 1;
+ rs->rs_xid = req->rq_xid;
+ rs->rs_transno = req->rq_transno;
+ rs->rs_export = exp;
+
+ spin_lock_irqsave (&obd->obd_uncommitted_replies_lock, flags);
+
+ if (rs->rs_transno > obd->obd_last_committed) {
+ /* not committed already */
+ list_add_tail (&rs->rs_obd_list,
+ &obd->obd_uncommitted_replies);
}
- LASSERT(rc == 0);
- DEBUG_REQ(D_HA, req, "cancelling locks for %s",
- req->rq_want_ack ? "commit" : "ack");
+ spin_unlock (&obd->obd_uncommitted_replies_lock);
+ spin_lock (&exp->exp_lock);
- exp->exp_outstanding_reply = NULL;
+ list_add_tail (&rs->rs_exp_list, &exp->exp_outstanding_replies);
- for (ack_lock = req->rq_ack_locks, i = 0;
- i < REQ_MAX_ACK_LOCKS; i++, ack_lock++) {
- if (!ack_lock->mode)
- continue;
- ldlm_lock_decref(&ack_lock->lock, ack_lock->mode);
+ spin_unlock_irqrestore (&exp->exp_lock, flags);
+
+ netrc = target_send_reply_msg (req, rc, fail_id);
+
+ spin_lock_irqsave (&svc->srv_lock, flags);
+
+ svc->srv_n_difficult_replies++;
+
+ if (netrc != 0) /* error sending: reply is off the net */
+ rs->rs_on_net = 0;
+
+ if (!rs->rs_on_net || /* some notifier */
+ list_empty(&rs->rs_exp_list) || /* completed already */
+ list_empty(&rs->rs_obd_list)) {
+ list_add_tail (&rs->rs_list, &svc->srv_reply_queue);
+ wake_up (&svc->srv_waitq);
+ } else {
+ list_add (&rs->rs_list, &sni->sni_active_replies);
+ rs->rs_scheduled = 0; /* allow notifier to schedule */
}
+
+ spin_unlock_irqrestore (&svc->srv_lock, flags);
}
int target_handle_ping(struct ptlrpc_request *req)
{
return lustre_pack_reply(req, 0, NULL, NULL);
}
-
-void *ldlm_put_lock_into_req(struct ptlrpc_request *req,
- struct lustre_handle *lock, int mode)
-{
- int i;
-
- for (i = 0; i < REQ_MAX_ACK_LOCKS; i++) {
- if (req->rq_ack_locks[i].mode)
- continue;
- memcpy(&req->rq_ack_locks[i].lock, lock, sizeof(*lock));
- req->rq_ack_locks[i].mode = mode;
- return &req->rq_ack_locks[i];
- }
- CERROR("no space for lock in struct ptlrpc_request\n");
- LBUG();
- return NULL;
-}
-
git://git.whamcloud.com / fs / lustre-release.git / blobdiff