/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * Copyright (c) 2002, 2003 Cluster File Systems, Inc. * * This file is part of Lustre, http://www.lustre.org. * * Lustre is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * Lustre is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Lustre; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ #define DEBUG_SUBSYSTEM S_RPC #ifndef __KERNEL__ #include #include #include #endif #include #include #include #include #include #include #include "ptlrpc_internal.h" void ptlrpc_init_client(int req_portal, int rep_portal, char *name, struct ptlrpc_client *cl) { cl->cli_request_portal = req_portal; cl->cli_reply_portal = rep_portal; cl->cli_name = name; } struct ptlrpc_connection *ptlrpc_uuid_to_connection(struct obd_uuid *uuid) { struct ptlrpc_connection *c; struct ptlrpc_peer peer; int err; err = ptlrpc_uuid_to_peer(uuid, &peer); if (err != 0) { CERROR("cannot find peer %s!\n", uuid->uuid); return NULL; } c = ptlrpc_get_connection(&peer, uuid); if (c) { memcpy(c->c_remote_uuid.uuid, uuid->uuid, sizeof(c->c_remote_uuid.uuid)); } CDEBUG(D_INFO, "%s -> %p\n", uuid->uuid, c); return c; } void ptlrpc_readdress_connection(struct ptlrpc_connection *conn, struct obd_uuid *uuid) { struct ptlrpc_peer peer; int err; err = ptlrpc_uuid_to_peer(uuid, &peer); if (err != 0) { CERROR("cannot find peer %s!\n", uuid->uuid); return; } memcpy(&conn->c_peer, &peer, sizeof (peer)); return; } static inline struct ptlrpc_bulk_desc *new_bulk(int npages, int type, int portal) { struct ptlrpc_bulk_desc *desc; OBD_ALLOC(desc, offsetof (struct ptlrpc_bulk_desc, bd_iov[npages])); if (!desc) return NULL; spin_lock_init(&desc->bd_lock); init_waitqueue_head(&desc->bd_waitq); desc->bd_max_iov = npages; desc->bd_iov_count = 0; desc->bd_md_h = PTL_INVALID_HANDLE; desc->bd_portal = portal; desc->bd_type = type; return desc; } struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_imp (struct ptlrpc_request *req, int npages, int type, int portal) { struct obd_import *imp = req->rq_import; struct ptlrpc_bulk_desc *desc; LASSERT(type == BULK_PUT_SINK || type == BULK_GET_SOURCE); desc = new_bulk(npages, type, portal); if (desc == NULL) RETURN(NULL); desc->bd_import_generation = req->rq_import_generation; desc->bd_import = class_import_get(imp); desc->bd_req = req; desc->bd_cbid.cbid_fn = client_bulk_callback; desc->bd_cbid.cbid_arg = desc; /* This makes req own desc, and free it when she frees herself */ req->rq_bulk = desc; return desc; } struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_exp (struct ptlrpc_request *req, int npages, int type, int portal) { struct obd_export *exp = req->rq_export; struct ptlrpc_bulk_desc *desc; LASSERT(type == BULK_PUT_SOURCE || type == BULK_GET_SINK); desc = new_bulk(npages, type, portal); if (desc == NULL) RETURN(NULL); desc->bd_export = class_export_get(exp); desc->bd_req = req; desc->bd_cbid.cbid_fn = server_bulk_callback; desc->bd_cbid.cbid_arg = desc; /* NB we don't assign rq_bulk here; server-side requests are * re-used, and the handler frees the bulk desc explicitly. */ return desc; } void ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc, struct page *page, int pageoffset, int len) { LASSERT(desc->bd_iov_count < desc->bd_max_iov); LASSERT(page != NULL); LASSERT(pageoffset >= 0); LASSERT(len > 0); LASSERT(pageoffset + len <= PAGE_SIZE); desc->bd_nob += len; ptlrpc_add_bulk_page(desc, page, pageoffset, len); } void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *desc) { ENTRY; LASSERT(desc != NULL); LASSERT(desc->bd_iov_count != LI_POISON); /* not freed already */ LASSERT(!desc->bd_network_rw); /* network hands off or */ LASSERT((desc->bd_export != NULL) ^ (desc->bd_import != NULL)); if (desc->bd_export) class_export_put(desc->bd_export); else class_import_put(desc->bd_import); OBD_FREE(desc, offsetof(struct ptlrpc_bulk_desc, bd_iov[desc->bd_max_iov])); EXIT; } /* FIXME prep_req now should return error code other than NULL. but * this is called everywhere :( */ struct ptlrpc_request *ptlrpc_prep_req(struct obd_import *imp, __u32 version, int opcode, int count, int *lengths, char **bufs) { struct ptlrpc_request *request; int rc; ENTRY; LASSERT((unsigned long)imp > 0x1000); OBD_ALLOC(request, sizeof(*request)); if (!request) { CERROR("request allocation out of memory\n"); RETURN(NULL); } request->rq_import = class_import_get(imp); rc = ptlrpcs_req_get_cred(request); if (rc) { CDEBUG(D_SEC, "failed to get credential\n"); GOTO(out_free, rc); } /* try to refresh the cred. we do this here in order to let fewer * refresh be performed in ptlrpcd context (which might block ptlrpcd). * fail out only if a fatal ptlrpcs error occured. */ ptlrpcs_req_refresh_cred(request); if (request->rq_ptlrpcs_err) GOTO(out_cred, rc = -EPERM); rc = lustre_pack_request(request, count, lengths, bufs); if (rc) { CERROR("cannot pack request %d\n", rc); GOTO(out_cred, rc); } request->rq_reqmsg->version |= version; if (imp->imp_server_timeout) request->rq_timeout = obd_timeout / 2; else request->rq_timeout = obd_timeout; request->rq_send_state = LUSTRE_IMP_FULL; request->rq_type = PTL_RPC_MSG_REQUEST; request->rq_req_cbid.cbid_fn = request_out_callback; request->rq_req_cbid.cbid_arg = request; request->rq_reply_cbid.cbid_fn = reply_in_callback; request->rq_reply_cbid.cbid_arg = request; request->rq_phase = RQ_PHASE_NEW; /* XXX FIXME bug 249 */ request->rq_request_portal = imp->imp_client->cli_request_portal; request->rq_reply_portal = imp->imp_client->cli_reply_portal; spin_lock_init(&request->rq_lock); INIT_LIST_HEAD(&request->rq_list); INIT_LIST_HEAD(&request->rq_replay_list); INIT_LIST_HEAD(&request->rq_set_chain); init_waitqueue_head(&request->rq_reply_waitq); request->rq_xid = ptlrpc_next_xid(); atomic_set(&request->rq_refcount, 1); request->rq_reqmsg->opc = opcode; request->rq_reqmsg->flags = 0; RETURN(request); out_cred: ptlrpcs_req_drop_cred(request); out_free: class_import_put(imp); OBD_FREE(request, sizeof(*request)); RETURN(NULL); } struct ptlrpc_request_set *ptlrpc_prep_set(void) { struct ptlrpc_request_set *set; OBD_ALLOC(set, sizeof *set); if (!set) RETURN(NULL); INIT_LIST_HEAD(&set->set_requests); init_waitqueue_head(&set->set_waitq); set->set_remaining = 0; spin_lock_init(&set->set_new_req_lock); INIT_LIST_HEAD(&set->set_new_requests); RETURN(set); } /* Finish with this set; opposite of prep_set. */ void ptlrpc_set_destroy(struct ptlrpc_request_set *set) { struct list_head *tmp; struct list_head *next; int expected_phase; int n = 0; ENTRY; /* Requests on the set should either all be completed, or all be new */ expected_phase = (set->set_remaining == 0) ? RQ_PHASE_COMPLETE : RQ_PHASE_NEW; list_for_each (tmp, &set->set_requests) { struct ptlrpc_request *req = list_entry(tmp, struct ptlrpc_request, rq_set_chain); LASSERT(req->rq_phase == expected_phase); n++; } LASSERT(set->set_remaining == 0 || set->set_remaining == n); list_for_each_safe(tmp, next, &set->set_requests) { struct ptlrpc_request *req = list_entry(tmp, struct ptlrpc_request, rq_set_chain); list_del_init(&req->rq_set_chain); LASSERT(req->rq_phase == expected_phase); if (req->rq_phase == RQ_PHASE_NEW) { if (req->rq_interpret_reply != NULL) { int (*interpreter)(struct ptlrpc_request *, void *, int) = req->rq_interpret_reply; /* higher level (i.e. LOV) failed; * let the sub reqs clean up */ req->rq_status = -EBADR; interpreter(req, &req->rq_async_args, req->rq_status); } set->set_remaining--; } req->rq_set = NULL; ptlrpc_req_finished (req); } LASSERT(set->set_remaining == 0); OBD_FREE(set, sizeof(*set)); EXIT; } void ptlrpc_set_add_req(struct ptlrpc_request_set *set, struct ptlrpc_request *req) { /* The set takes over the caller's request reference */ list_add_tail(&req->rq_set_chain, &set->set_requests); req->rq_set = set; set->set_remaining++; atomic_inc(&req->rq_import->imp_inflight); } /* lock so many callers can add things, the context that owns the set * is supposed to notice these and move them into the set proper. */ void ptlrpc_set_add_new_req(struct ptlrpc_request_set *set, struct ptlrpc_request *req) { unsigned long flags; spin_lock_irqsave(&set->set_new_req_lock, flags); /* The set takes over the caller's request reference */ list_add_tail(&req->rq_set_chain, &set->set_new_requests); req->rq_set = set; spin_unlock_irqrestore(&set->set_new_req_lock, flags); } /* * Based on the current state of the import, determine if the request * can be sent, is an error, or should be delayed. * * Returns true if this request should be delayed. If false, and * *status is set, then the request can not be sent and *status is the * error code. If false and status is 0, then request can be sent. * * The imp->imp_lock must be held. */ static int ptlrpc_import_delay_req(struct obd_import *imp, struct ptlrpc_request *req, int *status) { int delay = 0; ENTRY; LASSERT (status != NULL); *status = 0; if (imp->imp_state == LUSTRE_IMP_NEW) { DEBUG_REQ(D_ERROR, req, "Uninitialized import."); *status = -EIO; LBUG(); } else if (imp->imp_state == LUSTRE_IMP_CLOSED) { DEBUG_REQ(D_ERROR, req, "IMP_CLOSED "); *status = -EIO; } /* allow CONNECT even if import is invalid */ else if (req->rq_send_state == LUSTRE_IMP_CONNECTING && imp->imp_state == LUSTRE_IMP_CONNECTING) { ; } /* * If the import has been invalidated (such as by an OST failure), the * request must fail with -EIO. */ else if (imp->imp_invalid) { DEBUG_REQ(D_ERROR, req, "IMP_INVALID"); *status = -EIO; } else if (req->rq_import_generation != imp->imp_generation) { DEBUG_REQ(D_ERROR, req, "req wrong generation:"); *status = -EIO; } else if (req->rq_send_state != imp->imp_state) { if (imp->imp_obd->obd_no_recov || imp->imp_dlm_fake || req->rq_no_delay) *status = -EWOULDBLOCK; else delay = 1; } RETURN(delay); } static int ptlrpc_check_reply(struct ptlrpc_request *req) { unsigned long flags; int rc = 0; ENTRY; /* serialise with network callback */ spin_lock_irqsave (&req->rq_lock, flags); if (req->rq_replied) { DEBUG_REQ(D_NET, req, "REPLIED:"); GOTO(out, rc = 1); } if (req->rq_net_err && !req->rq_timedout) { spin_unlock_irqrestore (&req->rq_lock, flags); rc = ptlrpc_expire_one_request(req); spin_lock_irqsave (&req->rq_lock, flags); GOTO(out, rc); } if (req->rq_err) { DEBUG_REQ(D_ERROR, req, "ABORTED:"); GOTO(out, rc = 1); } if (req->rq_resend) { DEBUG_REQ(D_ERROR, req, "RESEND:"); GOTO(out, rc = 1); } if (req->rq_restart) { DEBUG_REQ(D_ERROR, req, "RESTART:"); GOTO(out, rc = 1); } EXIT; out: spin_unlock_irqrestore (&req->rq_lock, flags); DEBUG_REQ(D_NET, req, "rc = %d for", rc); return rc; } static int ptlrpc_check_status(struct ptlrpc_request *req) { int err; ENTRY; err = req->rq_repmsg->status; if (req->rq_repmsg->type == PTL_RPC_MSG_ERR) { DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err == %d", err); RETURN(err < 0 ? err : -EINVAL); } if (err < 0) { DEBUG_REQ(D_INFO, req, "status is %d", err); } else if (err > 0) { /* XXX: translate this error from net to host */ DEBUG_REQ(D_INFO, req, "status is %d", err); } RETURN(err); } static int after_reply(struct ptlrpc_request *req) { unsigned long flags; struct obd_import *imp = req->rq_import; int rc; ENTRY; LASSERT(!req->rq_receiving_reply); /* NB Until this point, the whole of the incoming message, * including buflens, status etc is in the sender's byte order. */ #if SWAB_PARANOIA /* Clear reply swab mask; this is a new reply in sender's byte order */ req->rq_rep_swab_mask = 0; #endif LASSERT (req->rq_nob_received <= req->rq_repbuf_len); rc = ptlrpcs_cli_unwrap_reply(req); if (rc) { CERROR("verify reply error: %d\n", rc); RETURN(rc); } /* unwrap_reply may request rpc be resend */ if (req->rq_ptlrpcs_restart) { req->rq_resend = 1; RETURN(0); } /* unwrap_reply will set rq_replen as the actual received * lustre_msg length */ rc = lustre_unpack_msg(req->rq_repmsg, req->rq_replen); if (rc) { CERROR("unpack_rep failed: %d\n", rc); RETURN(-EPROTO); } if (req->rq_repmsg->type != PTL_RPC_MSG_REPLY && req->rq_repmsg->type != PTL_RPC_MSG_ERR) { CERROR("invalid packet type received (type=%u)\n", req->rq_repmsg->type); RETURN(-EPROTO); } rc = ptlrpc_check_status(req); /* Either we've been evicted, or the server has failed for * some reason. Try to reconnect, and if that fails, punt to the * upcall. */ if (rc == -ENOTCONN) { if (req->rq_send_state != LUSTRE_IMP_FULL || imp->imp_obd->obd_no_recov || imp->imp_dlm_fake) { RETURN(-ENOTCONN); } ptlrpc_request_handle_notconn(req); RETURN(rc); } /* Store transno in reqmsg for replay. */ req->rq_reqmsg->transno = req->rq_transno = req->rq_repmsg->transno; if (req->rq_import->imp_replayable) { spin_lock_irqsave(&imp->imp_lock, flags); if (req->rq_transno != 0) ptlrpc_retain_replayable_request(req, imp); else if (req->rq_commit_cb != NULL) { spin_unlock_irqrestore(&imp->imp_lock, flags); req->rq_commit_cb(req); spin_lock_irqsave(&imp->imp_lock, flags); } if (req->rq_transno > imp->imp_max_transno) imp->imp_max_transno = req->rq_transno; /* Replay-enabled imports return commit-status information. */ if (req->rq_repmsg->last_committed) imp->imp_peer_committed_transno = req->rq_repmsg->last_committed; ptlrpc_free_committed(imp); spin_unlock_irqrestore(&imp->imp_lock, flags); } RETURN(rc); } static int ptlrpc_send_new_req(struct ptlrpc_request *req) { char str[PTL_NALFMT_SIZE]; struct obd_import *imp; unsigned long flags; int rc; ENTRY; LASSERT(req->rq_phase == RQ_PHASE_NEW); req->rq_phase = RQ_PHASE_RPC; imp = req->rq_import; spin_lock_irqsave(&imp->imp_lock, flags); req->rq_import_generation = imp->imp_generation; if (ptlrpc_import_delay_req(imp, req, &rc)) { spin_lock (&req->rq_lock); req->rq_waiting = 1; spin_unlock (&req->rq_lock); DEBUG_REQ(D_HA, req, "req from PID %d waiting for recovery: " "(%s != %s)", req->rq_reqmsg->status, ptlrpc_import_state_name(req->rq_send_state), ptlrpc_import_state_name(imp->imp_state)); LASSERT(list_empty (&req->rq_list)); list_add_tail(&req->rq_list, &imp->imp_delayed_list); spin_unlock_irqrestore(&imp->imp_lock, flags); RETURN(0); } if (rc != 0) { spin_unlock_irqrestore(&imp->imp_lock, flags); req->rq_status = rc; req->rq_phase = RQ_PHASE_INTERPRET; RETURN(rc); } /* XXX this is the same as ptlrpc_queue_wait */ LASSERT(list_empty(&req->rq_list)); list_add_tail(&req->rq_list, &imp->imp_sending_list); spin_unlock_irqrestore(&imp->imp_lock, flags); req->rq_reqmsg->status = current->pid; CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:ni:nid:opc" " %s:%s:%d:"LPU64":%s:%s:%d\n", current->comm, imp->imp_obd->obd_uuid.uuid, req->rq_reqmsg->status, req->rq_xid, imp->imp_connection->c_peer.peer_ni->pni_name, ptlrpc_peernid2str(&imp->imp_connection->c_peer, str), req->rq_reqmsg->opc); rc = ptl_send_rpc(req); if (rc) { DEBUG_REQ(D_HA, req, "send failed (%d); expect timeout", rc); req->rq_net_err = 1; RETURN(rc); } RETURN(0); } int ptlrpc_check_set(struct ptlrpc_request_set *set) { char str[PTL_NALFMT_SIZE]; unsigned long flags; struct list_head *tmp; int force_timer_recalc = 0; ENTRY; if (set->set_remaining == 0) RETURN(1); list_for_each(tmp, &set->set_requests) { struct ptlrpc_request *req = list_entry(tmp, struct ptlrpc_request, rq_set_chain); struct obd_import *imp = req->rq_import; int rc = 0; if (req->rq_phase == RQ_PHASE_NEW && ptlrpc_send_new_req(req)) { force_timer_recalc = 1; } if (!(req->rq_phase == RQ_PHASE_RPC || req->rq_phase == RQ_PHASE_BULK || req->rq_phase == RQ_PHASE_INTERPRET || req->rq_phase == RQ_PHASE_COMPLETE)) { DEBUG_REQ(D_ERROR, req, "bad phase %x", req->rq_phase); LBUG(); } if (req->rq_phase == RQ_PHASE_COMPLETE) continue; if (req->rq_phase == RQ_PHASE_INTERPRET) GOTO(interpret, req->rq_status); if (req->rq_net_err && !req->rq_timedout) ptlrpc_expire_one_request(req); if (req->rq_err || req->rq_ptlrpcs_err) { ptlrpc_unregister_reply(req); if (req->rq_status == 0) req->rq_status = req->rq_err ? -EIO : -EPERM; req->rq_phase = RQ_PHASE_INTERPRET; spin_lock_irqsave(&imp->imp_lock, flags); list_del_init(&req->rq_list); spin_unlock_irqrestore(&imp->imp_lock, flags); GOTO(interpret, req->rq_status); } /* ptlrpc_queue_wait->l_wait_event guarantees that rq_intr * will only be set after rq_timedout, but the oig waiting * path sets rq_intr irrespective of whether ptlrpcd has * seen a timeout. our policy is to only interpret * interrupted rpcs after they have timed out */ if (req->rq_intr && (req->rq_timedout || req->rq_waiting)) { /* NB could be on delayed list */ ptlrpc_unregister_reply(req); req->rq_status = -EINTR; req->rq_phase = RQ_PHASE_INTERPRET; spin_lock_irqsave(&imp->imp_lock, flags); list_del_init(&req->rq_list); spin_unlock_irqrestore(&imp->imp_lock, flags); GOTO(interpret, req->rq_status); } if (req->rq_phase == RQ_PHASE_RPC) { if (req->rq_timedout||req->rq_waiting||req->rq_resend) { int status; ptlrpc_unregister_reply(req); spin_lock_irqsave(&imp->imp_lock, flags); if (ptlrpc_import_delay_req(imp, req, &status)){ spin_unlock_irqrestore(&imp->imp_lock, flags); continue; } list_del_init(&req->rq_list); if (status != 0) { req->rq_status = status; req->rq_phase = RQ_PHASE_INTERPRET; spin_unlock_irqrestore(&imp->imp_lock, flags); GOTO(interpret, req->rq_status); } if (req->rq_no_resend) { req->rq_status = -ENOTCONN; req->rq_phase = RQ_PHASE_INTERPRET; spin_unlock_irqrestore(&imp->imp_lock, flags); GOTO(interpret, req->rq_status); } list_add_tail(&req->rq_list, &imp->imp_sending_list); spin_unlock_irqrestore(&imp->imp_lock, flags); req->rq_waiting = 0; if (req->rq_resend) { if (!req->rq_ptlrpcs_restart) lustre_msg_add_flags( req->rq_reqmsg, MSG_RESENT); if (req->rq_bulk) { __u64 old_xid = req->rq_xid; ptlrpc_unregister_bulk (req); /* ensure previous bulk fails */ req->rq_xid = ptlrpc_next_xid(); CDEBUG(D_HA, "resend bulk " "old x"LPU64 " new x"LPU64"\n", old_xid, req->rq_xid); } } rc = ptl_send_rpc(req); if (rc) { DEBUG_REQ(D_HA, req, "send failed (%d)", rc); force_timer_recalc = 1; req->rq_net_err = 1; } /* need to reset the timeout */ force_timer_recalc = 1; } /* Still waiting for a reply? */ if (ptlrpc_client_receiving_reply(req)) continue; /* Did we actually receive a reply? */ if (!ptlrpc_client_replied(req)) continue; spin_lock_irqsave(&imp->imp_lock, flags); list_del_init(&req->rq_list); spin_unlock_irqrestore(&imp->imp_lock, flags); req->rq_status = after_reply(req); if (req->rq_resend) { /* Add this req to the delayed list so it can be errored if the import is evicted after recovery. */ spin_lock_irqsave (&req->rq_lock, flags); list_add_tail(&req->rq_list, &imp->imp_delayed_list); spin_unlock_irqrestore(&req->rq_lock, flags); continue; } /* If there is no bulk associated with this request, * then we're done and should let the interpreter * process the reply. Similarly if the RPC returned * an error, and therefore the bulk will never arrive. */ if (req->rq_bulk == NULL || req->rq_status != 0) { req->rq_phase = RQ_PHASE_INTERPRET; GOTO(interpret, req->rq_status); } req->rq_phase = RQ_PHASE_BULK; } LASSERT(req->rq_phase == RQ_PHASE_BULK); if (ptlrpc_bulk_active(req->rq_bulk)) continue; if (!req->rq_bulk->bd_success) { /* The RPC reply arrived OK, but the bulk screwed * up! Dead wierd since the server told us the RPC * was good after getting the REPLY for her GET or * the ACK for her PUT. */ DEBUG_REQ(D_ERROR, req, "bulk transfer failed"); LBUG(); } req->rq_phase = RQ_PHASE_INTERPRET; interpret: LASSERT(req->rq_phase == RQ_PHASE_INTERPRET); LASSERT(!req->rq_receiving_reply); ptlrpc_unregister_reply(req); if (req->rq_bulk != NULL) ptlrpc_unregister_bulk (req); req->rq_phase = RQ_PHASE_COMPLETE; if (req->rq_interpret_reply != NULL) { int (*interpreter)(struct ptlrpc_request *,void *,int) = req->rq_interpret_reply; req->rq_status = interpreter(req, &req->rq_async_args, req->rq_status); } CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:ni:nid:" "opc %s:%s:%d:"LPU64":%s:%s:%d\n", current->comm, imp->imp_obd->obd_uuid.uuid, req->rq_reqmsg->status, req->rq_xid, imp->imp_connection->c_peer.peer_ni->pni_name, ptlrpc_peernid2str(&imp->imp_connection->c_peer, str), req->rq_reqmsg->opc); set->set_remaining--; atomic_dec(&imp->imp_inflight); wake_up(&imp->imp_recovery_waitq); } /* If we hit an error, we want to recover promptly. */ RETURN(set->set_remaining == 0 || force_timer_recalc); } int ptlrpc_expire_one_request(struct ptlrpc_request *req) { unsigned long flags; struct obd_import *imp = req->rq_import; int replied = 0; ENTRY; DEBUG_REQ(D_ERROR, req, "timeout (sent at %lu, %lus ago)", (long)req->rq_sent, LTIME_S(CURRENT_TIME) - req->rq_sent); spin_lock_irqsave (&req->rq_lock, flags); replied = req->rq_replied; if (!replied) req->rq_timedout = 1; spin_unlock_irqrestore (&req->rq_lock, flags); if (replied) RETURN(0); ptlrpc_unregister_reply (req); if (obd_dump_on_timeout) portals_debug_dumplog(); if (req->rq_bulk != NULL) ptlrpc_unregister_bulk (req); if (imp == NULL) { DEBUG_REQ(D_HA, req, "NULL import: already cleaned up?"); RETURN(1); } /* The DLM server doesn't want recovery run on its imports. */ if (imp->imp_dlm_fake) RETURN(1); /* If this request is for recovery or other primordial tasks, * then error it out here. */ if (req->rq_send_state != LUSTRE_IMP_FULL || imp->imp_obd->obd_no_recov) { spin_lock_irqsave (&req->rq_lock, flags); req->rq_status = -ETIMEDOUT; req->rq_err = 1; spin_unlock_irqrestore (&req->rq_lock, flags); RETURN(1); } ptlrpc_fail_import(imp, req->rq_import_generation); RETURN(0); } int ptlrpc_expired_set(void *data) { struct ptlrpc_request_set *set = data; struct list_head *tmp; time_t now = LTIME_S(CURRENT_TIME); ENTRY; LASSERT(set != NULL); /* A timeout expired; see which reqs it applies to... */ list_for_each (tmp, &set->set_requests) { struct ptlrpc_request *req = list_entry(tmp, struct ptlrpc_request, rq_set_chain); /* request in-flight? */ if (!((req->rq_phase == RQ_PHASE_RPC && !req->rq_waiting && !req->rq_resend) || (req->rq_phase == RQ_PHASE_BULK))) continue; if (req->rq_timedout || /* already dealt with */ req->rq_sent + req->rq_timeout > now) /* not expired */ continue; /* deal with this guy */ ptlrpc_expire_one_request (req); } /* When waiting for a whole set, we always to break out of the * sleep so we can recalculate the timeout, or enable interrupts * iff everyone's timed out. */ RETURN(1); } void ptlrpc_mark_interrupted(struct ptlrpc_request *req) { unsigned long flags; spin_lock_irqsave(&req->rq_lock, flags); req->rq_intr = 1; spin_unlock_irqrestore(&req->rq_lock, flags); } void ptlrpc_interrupted_set(void *data) { struct ptlrpc_request_set *set = data; struct list_head *tmp; LASSERT(set != NULL); CERROR("INTERRUPTED SET %p\n", set); list_for_each(tmp, &set->set_requests) { struct ptlrpc_request *req = list_entry(tmp, struct ptlrpc_request, rq_set_chain); if (req->rq_phase != RQ_PHASE_RPC) continue; ptlrpc_mark_interrupted(req); } } int ptlrpc_set_next_timeout(struct ptlrpc_request_set *set) { struct list_head *tmp; time_t now = LTIME_S(CURRENT_TIME); time_t deadline; int timeout = 0; struct ptlrpc_request *req; ENTRY; SIGNAL_MASK_ASSERT(); /* XXX BUG 1511 */ list_for_each(tmp, &set->set_requests) { req = list_entry(tmp, struct ptlrpc_request, rq_set_chain); /* request in-flight? */ if (!((req->rq_phase == RQ_PHASE_RPC && !req->rq_waiting) || (req->rq_phase == RQ_PHASE_BULK))) continue; if (req->rq_timedout) /* already timed out */ continue; deadline = req->rq_sent + req->rq_timeout; if (deadline <= now) /* actually expired already */ timeout = 1; /* ASAP */ else if (timeout == 0 || timeout > deadline - now) timeout = deadline - now; } RETURN(timeout); } int ptlrpc_set_wait(struct ptlrpc_request_set *set) { struct list_head *tmp; struct ptlrpc_request *req; struct l_wait_info lwi; int rc, timeout; ENTRY; LASSERT(!list_empty(&set->set_requests)); list_for_each(tmp, &set->set_requests) { req = list_entry(tmp, struct ptlrpc_request, rq_set_chain); if (req->rq_phase == RQ_PHASE_NEW) (void)ptlrpc_send_new_req(req); } do { timeout = ptlrpc_set_next_timeout(set); /* wait until all complete, interrupted, or an in-flight * req times out */ CDEBUG(D_HA, "set %p going to sleep for %d seconds\n", set, timeout); lwi = LWI_TIMEOUT_INTR((timeout ? timeout : 1) * HZ, ptlrpc_expired_set, ptlrpc_interrupted_set, set); rc = l_wait_event(set->set_waitq, ptlrpc_check_set(set), &lwi); LASSERT(rc == 0 || rc == -EINTR || rc == -ETIMEDOUT); /* -EINTR => all requests have been flagged rq_intr so next * check completes. * -ETIMEOUTD => someone timed out. When all reqs have * timed out, signals are enabled allowing completion with * EINTR. * I don't really care if we go once more round the loop in * the error cases -eeb. */ } while (rc != 0 || set->set_remaining != 0); LASSERT(set->set_remaining == 0); rc = 0; list_for_each(tmp, &set->set_requests) { req = list_entry(tmp, struct ptlrpc_request, rq_set_chain); LASSERT(req->rq_phase == RQ_PHASE_COMPLETE); if (req->rq_status != 0) rc = req->rq_status; } if (set->set_interpret != NULL) { int (*interpreter)(struct ptlrpc_request_set *set,void *,int) = set->set_interpret; rc = interpreter (set, set->set_arg, rc); } RETURN(rc); } static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked) { ENTRY; if (request == NULL) { EXIT; return; } LASSERTF(!request->rq_receiving_reply, "req %p\n", request); LASSERTF(request->rq_rqbd == NULL, "req %p\n",request);/* client-side */ LASSERTF(list_empty(&request->rq_list), "req %p\n", request); LASSERTF(list_empty(&request->rq_set_chain), "req %p\n", request); LASSERT(request->rq_cred); /* We must take it off the imp_replay_list first. Otherwise, we'll set * request->rq_reqmsg to NULL while osc_close is dereferencing it. */ if (request->rq_import != NULL) { unsigned long flags = 0; if (!locked) spin_lock_irqsave(&request->rq_import->imp_lock, flags); list_del_init(&request->rq_replay_list); if (!locked) spin_unlock_irqrestore(&request->rq_import->imp_lock, flags); } LASSERTF(list_empty(&request->rq_replay_list), "req %p\n", request); if (atomic_read(&request->rq_refcount) != 0) { DEBUG_REQ(D_ERROR, request, "freeing request with nonzero refcount"); LBUG(); } if (request->rq_repbuf != NULL) ptlrpcs_cli_free_repbuf(request); if (request->rq_reqbuf != NULL) ptlrpcs_cli_free_reqbuf(request); if (request->rq_export != NULL) { class_export_put(request->rq_export); request->rq_export = NULL; } if (request->rq_import != NULL) { class_import_put(request->rq_import); request->rq_import = NULL; } if (request->rq_bulk != NULL) ptlrpc_free_bulk(request->rq_bulk); ptlrpcs_req_drop_cred(request); OBD_FREE(request, sizeof(*request)); EXIT; } void ptlrpc_free_req(struct ptlrpc_request *request) { __ptlrpc_free_req(request, 0); } static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked); void ptlrpc_req_finished_with_imp_lock(struct ptlrpc_request *request) { LASSERT_SPIN_LOCKED(&request->rq_import->imp_lock); (void)__ptlrpc_req_finished(request, 1); } static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked) { ENTRY; if (request == NULL) RETURN(1); if (request == LP_POISON || request->rq_reqmsg == LP_POISON) { CERROR("dereferencing freed request (bug 575)\n"); LBUG(); RETURN(1); } DEBUG_REQ(D_INFO, request, "refcount now %u", atomic_read(&request->rq_refcount) - 1); if (atomic_dec_and_test(&request->rq_refcount)) { __ptlrpc_free_req(request, locked); RETURN(1); } RETURN(0); } void ptlrpc_req_finished(struct ptlrpc_request *request) { __ptlrpc_req_finished(request, 0); } /* Disengage the client's reply buffer from the network * NB does _NOT_ unregister any client-side bulk. * IDEMPOTENT, but _not_ safe against concurrent callers. * The request owner (i.e. the thread doing the I/O) must call... */ void ptlrpc_unregister_reply (struct ptlrpc_request *request) { int rc; wait_queue_head_t *wq; struct l_wait_info lwi; LASSERT(!in_interrupt ()); /* might sleep */ if (!ptlrpc_client_receiving_reply(request)) return; PtlMDUnlink (request->rq_reply_md_h); /* We have to l_wait_event() whatever the result, to give liblustre * a chance to run reply_in_callback() */ if (request->rq_set != NULL) wq = &request->rq_set->set_waitq; else wq = &request->rq_reply_waitq; for (;;) { /* Network access will complete in finite time but the HUGE * timeout lets us CWARN for visibility of sluggish NALs */ lwi = LWI_TIMEOUT(300 * HZ, NULL, NULL); rc = l_wait_event (*wq, !ptlrpc_client_receiving_reply(request), &lwi); if (rc == 0) return; LASSERT (rc == -ETIMEDOUT); DEBUG_REQ(D_WARNING, request, "Unexpectedly long timeout"); } } /* caller must hold imp->imp_lock */ void ptlrpc_free_committed(struct obd_import *imp) { struct list_head *tmp, *saved; struct ptlrpc_request *req; struct ptlrpc_request *last_req = NULL; /* temporary fire escape */ ENTRY; LASSERT(imp != NULL); LASSERT_SPIN_LOCKED(&imp->imp_lock); CDEBUG(D_HA, "%s: committing for last_committed "LPU64"\n", imp->imp_obd->obd_name, imp->imp_peer_committed_transno); list_for_each_safe(tmp, saved, &imp->imp_replay_list) { req = list_entry(tmp, struct ptlrpc_request, rq_replay_list); /* XXX ok to remove when 1357 resolved - rread 05/29/03 */ LASSERT(req != last_req); last_req = req; if (req->rq_import_generation < imp->imp_generation) { DEBUG_REQ(D_HA, req, "freeing request with old gen"); GOTO(free_req, 0); } if (req->rq_replay) { DEBUG_REQ(D_HA, req, "keeping (FL_REPLAY)"); continue; } /* not yet committed */ if (req->rq_transno > imp->imp_peer_committed_transno) { DEBUG_REQ(D_HA, req, "stopping search"); break; } DEBUG_REQ(D_HA, req, "committing (last_committed "LPU64")", imp->imp_peer_committed_transno); free_req: if (req->rq_commit_cb != NULL) req->rq_commit_cb(req); list_del_init(&req->rq_replay_list); __ptlrpc_req_finished(req, 1); } EXIT; return; } void ptlrpc_cleanup_client(struct obd_import *imp) { ENTRY; EXIT; return; } void ptlrpc_resend_req(struct ptlrpc_request *req) { unsigned long flags; DEBUG_REQ(D_HA, req, "going to resend"); req->rq_reqmsg->handle.cookie = 0; req->rq_status = -EAGAIN; spin_lock_irqsave (&req->rq_lock, flags); req->rq_resend = 1; req->rq_net_err = 0; req->rq_timedout = 0; if (req->rq_bulk) { __u64 old_xid = req->rq_xid; /* ensure previous bulk fails */ req->rq_xid = ptlrpc_next_xid(); CDEBUG(D_HA, "resend bulk old x"LPU64" new x"LPU64"\n", old_xid, req->rq_xid); } ptlrpc_wake_client_req(req); spin_unlock_irqrestore (&req->rq_lock, flags); } /* XXX: this function and rq_status are currently unused */ void ptlrpc_restart_req(struct ptlrpc_request *req) { unsigned long flags; DEBUG_REQ(D_HA, req, "restarting (possibly-)completed request"); req->rq_status = -ERESTARTSYS; spin_lock_irqsave (&req->rq_lock, flags); req->rq_restart = 1; req->rq_timedout = 0; ptlrpc_wake_client_req(req); spin_unlock_irqrestore (&req->rq_lock, flags); } static int expired_request(void *data) { struct ptlrpc_request *req = data; ENTRY; /* some failure can suspend regular timeouts */ if (ptlrpc_check_suspend()) RETURN(1); RETURN(ptlrpc_expire_one_request(req)); } static void interrupted_request(void *data) { unsigned long flags; struct ptlrpc_request *req = data; DEBUG_REQ(D_HA, req, "request interrupted"); spin_lock_irqsave (&req->rq_lock, flags); req->rq_intr = 1; spin_unlock_irqrestore (&req->rq_lock, flags); } struct ptlrpc_request *ptlrpc_request_addref(struct ptlrpc_request *req) { ENTRY; atomic_inc(&req->rq_refcount); RETURN(req); } void ptlrpc_retain_replayable_request(struct ptlrpc_request *req, struct obd_import *imp) { struct list_head *tmp; LASSERT_SPIN_LOCKED(&imp->imp_lock); /* clear this for new requests that were resent as well as resent replayed requests. */ lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT); /* don't re-add requests that have been replayed */ if (!list_empty(&req->rq_replay_list)) return; lustre_msg_add_flags(req->rq_reqmsg, MSG_REPLAY); LASSERT(imp->imp_replayable); /* Balanced in ptlrpc_free_committed, usually. */ ptlrpc_request_addref(req); list_for_each_prev(tmp, &imp->imp_replay_list) { struct ptlrpc_request *iter = list_entry(tmp, struct ptlrpc_request, rq_replay_list); /* We may have duplicate transnos if we create and then * open a file, or for closes retained if to match creating * opens, so use req->rq_xid as a secondary key. * (See bugs 684, 685, and 428.) * XXX no longer needed, but all opens need transnos! */ if (iter->rq_transno > req->rq_transno) continue; if (iter->rq_transno == req->rq_transno) { LASSERT(iter->rq_xid != req->rq_xid); if (iter->rq_xid > req->rq_xid) continue; } list_add(&req->rq_replay_list, &iter->rq_replay_list); return; } list_add_tail(&req->rq_replay_list, &imp->imp_replay_list); } int ptlrpc_queue_wait(struct ptlrpc_request *req) { char str[PTL_NALFMT_SIZE]; int rc = 0; int brc; struct l_wait_info lwi; struct obd_import *imp = req->rq_import; unsigned long flags; int timeout = 0; ENTRY; LASSERT(req->rq_set == NULL); LASSERT(!req->rq_receiving_reply); atomic_inc(&imp->imp_inflight); if (imp->imp_connection == NULL) { CERROR("request on not connected import %s\n", imp->imp_obd->obd_name); RETURN(-EINVAL); } /* for distributed debugging */ req->rq_reqmsg->status = current->pid; LASSERT(imp->imp_obd != NULL); CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:ni:nid:opc " "%s:%s:%d:"LPU64":%s:%s:%d\n", current->comm, imp->imp_obd->obd_uuid.uuid, req->rq_reqmsg->status, req->rq_xid, imp->imp_connection->c_peer.peer_ni->pni_name, ptlrpc_peernid2str(&imp->imp_connection->c_peer, str), req->rq_reqmsg->opc); /* Mark phase here for a little debug help */ req->rq_phase = RQ_PHASE_RPC; spin_lock_irqsave(&imp->imp_lock, flags); req->rq_import_generation = imp->imp_generation; restart: if (ptlrpc_import_delay_req(imp, req, &rc)) { list_del(&req->rq_list); list_add_tail(&req->rq_list, &imp->imp_delayed_list); spin_unlock_irqrestore(&imp->imp_lock, flags); DEBUG_REQ(D_HA, req, "\"%s\" waiting for recovery: (%s != %s)", current->comm, ptlrpc_import_state_name(req->rq_send_state), ptlrpc_import_state_name(imp->imp_state)); lwi = LWI_INTR(interrupted_request, req); rc = l_wait_event(req->rq_reply_waitq, (req->rq_send_state == imp->imp_state || req->rq_err), &lwi); DEBUG_REQ(D_HA, req, "\"%s\" awake: (%s == %s or %d == 1)", current->comm, ptlrpc_import_state_name(imp->imp_state), ptlrpc_import_state_name(req->rq_send_state), req->rq_err); spin_lock_irqsave(&imp->imp_lock, flags); list_del_init(&req->rq_list); if (req->rq_err) { rc = -EIO; } else if (req->rq_intr) { rc = -EINTR; } else if (req->rq_no_resend) { spin_unlock_irqrestore(&imp->imp_lock, flags); GOTO(out, rc = -ETIMEDOUT); } else { GOTO(restart, rc); } } if (rc != 0) { list_del_init(&req->rq_list); spin_unlock_irqrestore(&imp->imp_lock, flags); req->rq_status = rc; // XXX this ok? GOTO(out, rc); } if (req->rq_resend) { if (!req->rq_ptlrpcs_restart) lustre_msg_add_flags(req->rq_reqmsg, MSG_RESENT); if (req->rq_bulk != NULL) ptlrpc_unregister_bulk (req); DEBUG_REQ(D_HA, req, "resending: "); } /* XXX this is the same as ptlrpc_set_wait */ LASSERT(list_empty(&req->rq_list)); list_add_tail(&req->rq_list, &imp->imp_sending_list); spin_unlock_irqrestore(&imp->imp_lock, flags); rc = ptl_send_rpc(req); if (rc) { DEBUG_REQ(D_HA, req, "send failed (%d); recovering", rc); timeout = 1; } else { timeout = MAX(req->rq_timeout * HZ, 1); DEBUG_REQ(D_NET, req, "-- sleeping for %d jiffies", timeout); } repeat: lwi = LWI_TIMEOUT_INTR(timeout, expired_request, interrupted_request, req); rc = l_wait_event(req->rq_reply_waitq, ptlrpc_check_reply(req), &lwi); if (rc == -ETIMEDOUT && ptlrpc_check_and_wait_suspend(req)) goto repeat; DEBUG_REQ(D_NET, req, "-- done sleeping"); CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:ni:nid:opc " "%s:%s:%d:"LPU64":%s:%s:%d\n", current->comm, imp->imp_obd->obd_uuid.uuid, req->rq_reqmsg->status, req->rq_xid, imp->imp_connection->c_peer.peer_ni->pni_name, ptlrpc_peernid2str(&imp->imp_connection->c_peer, str), req->rq_reqmsg->opc); spin_lock_irqsave(&imp->imp_lock, flags); list_del_init(&req->rq_list); spin_unlock_irqrestore(&imp->imp_lock, flags); /* If the reply was received normally, this just grabs the spinlock * (ensuring the reply callback has returned), sees that * req->rq_receiving_reply is clear and returns. */ ptlrpc_unregister_reply (req); if (req->rq_err) GOTO(out, rc = -EIO); if (req->rq_ptlrpcs_err) GOTO(out, rc = -EPERM); /* Resend if we need to, unless we were interrupted. */ if (req->rq_resend && !req->rq_intr) { /* ...unless we were specifically told otherwise. */ if (req->rq_no_resend) GOTO(out, rc = -ETIMEDOUT); spin_lock_irqsave(&imp->imp_lock, flags); goto restart; } if (req->rq_intr) { /* Should only be interrupted if we timed out. */ if (!req->rq_timedout) DEBUG_REQ(D_ERROR, req, "rq_intr set but rq_timedout not"); GOTO(out, rc = -EINTR); } if (req->rq_timedout) { /* non-recoverable timeout */ GOTO(out, rc = -ETIMEDOUT); } if (!req->rq_replied) { /* How can this be? -eeb */ DEBUG_REQ(D_ERROR, req, "!rq_replied: "); LBUG(); GOTO(out, rc = req->rq_status); } rc = after_reply (req); /* NB may return +ve success rc */ if (req->rq_resend) { spin_lock_irqsave(&imp->imp_lock, flags); goto restart; } out: if (req->rq_bulk != NULL) { if (rc >= 0) { /* success so far. Note that anything going wrong * with bulk now, is EXTREMELY strange, since the * server must have believed that the bulk * tranferred OK before she replied with success to * me. */ lwi = LWI_TIMEOUT(timeout, NULL, NULL); brc = l_wait_event(req->rq_reply_waitq, !ptlrpc_bulk_active(req->rq_bulk), &lwi); LASSERT(brc == 0 || brc == -ETIMEDOUT); if (brc != 0) { LASSERT(brc == -ETIMEDOUT); DEBUG_REQ(D_ERROR, req, "bulk timed out"); rc = brc; } else if (!req->rq_bulk->bd_success) { DEBUG_REQ(D_ERROR, req, "bulk transfer failed"); rc = -EIO; } } if (rc < 0) ptlrpc_unregister_bulk (req); } LASSERT(!req->rq_receiving_reply); req->rq_phase = RQ_PHASE_INTERPRET; atomic_dec(&imp->imp_inflight); wake_up(&imp->imp_recovery_waitq); RETURN(rc); } struct ptlrpc_replay_async_args { int praa_old_state; int praa_old_status; }; static int ptlrpc_replay_interpret(struct ptlrpc_request *req, void * data, int rc) { struct ptlrpc_replay_async_args *aa = data; struct obd_import *imp = req->rq_import; unsigned long flags; atomic_dec(&imp->imp_replay_inflight); if (!req->rq_replied) { CERROR("request replay timed out, restarting recovery\n"); GOTO(out, rc = -ETIMEDOUT); } #if SWAB_PARANOIA /* Clear reply swab mask; this is a new reply in sender's byte order */ req->rq_rep_swab_mask = 0; #endif LASSERT (req->rq_nob_received <= req->rq_repbuf_len); rc = lustre_unpack_msg(req->rq_repmsg, req->rq_replen); if (rc) { CERROR("unpack_rep failed: %d\n", rc); GOTO(out, rc = -EPROTO); } if (req->rq_repmsg->type == PTL_RPC_MSG_ERR && req->rq_repmsg->status == -ENOTCONN) GOTO(out, rc = req->rq_repmsg->status); /* The transno had better not change over replay. */ LASSERT(req->rq_reqmsg->transno == req->rq_repmsg->transno); DEBUG_REQ(D_HA, req, "got rep"); /* let the callback do fixups, possibly including in the request */ if (req->rq_replay_cb) req->rq_replay_cb(req); if (req->rq_replied && req->rq_repmsg->status != aa->praa_old_status) { DEBUG_REQ(D_ERROR, req, "status %d, old was %d", req->rq_repmsg->status, aa->praa_old_status); } else { /* Put it back for re-replay. */ req->rq_repmsg->status = aa->praa_old_status; } spin_lock_irqsave(&imp->imp_lock, flags); imp->imp_last_replay_transno = req->rq_transno; spin_unlock_irqrestore(&imp->imp_lock, flags); /* continue with recovery */ rc = ptlrpc_import_recovery_state_machine(imp); out: req->rq_send_state = aa->praa_old_state; if (rc != 0) /* this replay failed, so restart recovery */ ptlrpc_connect_import(imp, NULL); RETURN(rc); } int ptlrpc_replay_req(struct ptlrpc_request *req) { struct ptlrpc_replay_async_args *aa; ENTRY; LASSERT(req->rq_import->imp_state == LUSTRE_IMP_REPLAY); /* Not handling automatic bulk replay yet (or ever?) */ LASSERT(req->rq_bulk == NULL); DEBUG_REQ(D_HA, req, "REPLAY"); LASSERT (sizeof (*aa) <= sizeof (req->rq_async_args)); aa = (struct ptlrpc_replay_async_args *)&req->rq_async_args; memset(aa, 0, sizeof *aa); /* Prepare request to be resent with ptlrpcd */ aa->praa_old_state = req->rq_send_state; req->rq_send_state = LUSTRE_IMP_REPLAY; req->rq_phase = RQ_PHASE_NEW; aa->praa_old_status = req->rq_repmsg->status; req->rq_status = 0; req->rq_interpret_reply = ptlrpc_replay_interpret; atomic_inc(&req->rq_import->imp_replay_inflight); ptlrpc_request_addref(req); /* ptlrpcd needs a ref */ ptlrpcd_add_req(req); RETURN(0); } void ptlrpc_abort_inflight(struct obd_import *imp) { unsigned long flags; struct list_head *tmp, *n; ENTRY; /* Make sure that no new requests get processed for this import. * ptlrpc_{queue,set}_wait must (and does) hold imp_lock while testing * this flag and then putting requests on sending_list or delayed_list. */ spin_lock_irqsave(&imp->imp_lock, flags); /* XXX locking? Maybe we should remove each request with the list * locked? Also, how do we know if the requests on the list are * being freed at this time? */ list_for_each_safe(tmp, n, &imp->imp_sending_list) { struct ptlrpc_request *req = list_entry(tmp, struct ptlrpc_request, rq_list); DEBUG_REQ(D_HA, req, "inflight"); spin_lock (&req->rq_lock); if (req->rq_import_generation < imp->imp_generation) { req->rq_err = 1; ptlrpc_wake_client_req(req); } spin_unlock (&req->rq_lock); } list_for_each_safe(tmp, n, &imp->imp_delayed_list) { struct ptlrpc_request *req = list_entry(tmp, struct ptlrpc_request, rq_list); DEBUG_REQ(D_HA, req, "aborting waiting req"); spin_lock (&req->rq_lock); if (req->rq_import_generation < imp->imp_generation) { req->rq_err = 1; ptlrpc_wake_client_req(req); } spin_unlock (&req->rq_lock); } list_for_each_safe(tmp, n, &imp->imp_rawrpc_list) { struct ptlrpc_request *req = list_entry(tmp, struct ptlrpc_request, rq_list); DEBUG_REQ(D_HA, req, "aborting raw rpc"); spin_lock(&req->rq_lock); req->rq_err = 1; ptlrpc_wake_client_req(req); spin_unlock(&req->rq_lock); } /* Last chance to free reqs left on the replay list, but we * will still leak reqs that haven't comitted. */ if (imp->imp_replayable) ptlrpc_free_committed(imp); spin_unlock_irqrestore(&imp->imp_lock, flags); EXIT; } static __u64 ptlrpc_last_xid = 0; static spinlock_t ptlrpc_last_xid_lock = SPIN_LOCK_UNLOCKED; __u64 ptlrpc_next_xid(void) { __u64 tmp; spin_lock(&ptlrpc_last_xid_lock); tmp = ++ptlrpc_last_xid; spin_unlock(&ptlrpc_last_xid_lock); return tmp; }