Whamcloud - gitweb
LU-1201 checksum: add libcfs crypto hash
[fs/lustre-release.git] / lustre / ost / ost_handler.c
index 1eeaabf..83dc74d 100644 (file)
@@ -1,6 +1,4 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
  * GPL HEADER START
  *
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
@@ -28,6 +26,8 @@
 /*
  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Whamcloud, Inc.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -39,9 +39,6 @@
  * Author: Phil Schwan <phil@clusterfs.com>
  */
 
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
 #define DEBUG_SUBSYSTEM S_OST
 
 #include <linux/module.h>
@@ -83,23 +80,21 @@ static void ost_drop_id(struct obd_export *exp, struct obdo *oa)
 
 /**
  * Validate oa from client.
- * 1. If the request comes from 1.8 clients, it will reset o_seq with MDT0.
- * 2. If the request comes from 2.0 clients, currently only RSVD seq and IDIF
- *    req are valid.
- *      a. for single MDS  seq = FID_SEQ_OST_MDT0,
- *      b. for CMD, seq = FID_SEQ_OST_MDT0, FID_SEQ_OST_MDT1 - FID_SEQ_OST_MAX
+ * If the request comes from 2.0 clients, currently only RSVD seq and IDIF
+ * req are valid.
+ *    a. for single MDS  seq = FID_SEQ_OST_MDT0,
+ *    b. for CMD, seq = FID_SEQ_OST_MDT0, FID_SEQ_OST_MDT1 - FID_SEQ_OST_MAX
  */
 static int ost_validate_obdo(struct obd_export *exp, struct obdo *oa,
                              struct obd_ioobj *ioobj)
 {
-        if (oa != NULL && (!(oa->o_valid & OBD_MD_FLGROUP) ||
-            !(exp->exp_connect_flags & OBD_CONNECT_FULL20))) {
+        if (oa != NULL && !(oa->o_valid & OBD_MD_FLGROUP)) {
                 oa->o_seq = FID_SEQ_OST_MDT0;
                 if (ioobj)
                         ioobj->ioo_seq = FID_SEQ_OST_MDT0;
         /* remove fid_seq_is_rsvd() after FID-on-OST allows SEQ > 9 */
-        } else if (oa == NULL ||
-                   !(fid_seq_is_rsvd(oa->o_seq) || fid_seq_is_idif(oa->o_seq))) {
+        } else if (oa == NULL || !(fid_seq_is_rsvd(oa->o_seq) ||
+                                   fid_seq_is_mdt0(oa->o_seq))) {
                 CERROR("%s: client %s sent invalid object "POSTID"\n",
                        exp->exp_obd->obd_name, obd_export_nid2str(exp),
                        oa ? oa->o_id : -1, oa ? oa->o_seq : -1);
@@ -189,7 +184,8 @@ static int ost_destroy(struct obd_export *exp, struct ptlrpc_request *req,
         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 
         /* Do the destroy and set the reply status accordingly  */
-        req->rq_status = obd_destroy(exp, &body->oa, NULL, oti, NULL, capa);
+        req->rq_status = obd_destroy(req->rq_svc_thread->t_env, exp,
+                                     &repbody->oa, NULL, oti, NULL, capa);
         RETURN(0);
 }
 
@@ -263,40 +259,40 @@ static int ost_getattr(struct obd_export *exp, struct ptlrpc_request *req)
         if (rc)
                 RETURN(rc);
 
-        rc = req_capsule_server_pack(&req->rq_pill);
-        if (rc)
-                RETURN(rc);
-
-        rc = ost_lock_get(exp, &body->oa, 0, OBD_OBJECT_EOF, &lh, LCK_PR, 0);
-        if (rc)
-                RETURN(rc);
-
         if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
                 capa = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
                 if (capa == NULL) {
                         CERROR("Missing capability for OST GETATTR");
-                        GOTO(unlock, rc = -EFAULT);
+                        RETURN(-EFAULT);
                 }
         }
 
+        rc = req_capsule_server_pack(&req->rq_pill);
+        if (rc)
+                RETURN(rc);
+
+        repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+        repbody->oa = body->oa;
+
+        rc = ost_lock_get(exp, &repbody->oa, 0, OBD_OBJECT_EOF, &lh, LCK_PR, 0);
+        if (rc)
+                RETURN(rc);
+
         OBD_ALLOC_PTR(oinfo);
         if (!oinfo)
                 GOTO(unlock, rc = -ENOMEM);
-        oinfo->oi_oa = &body->oa;
+        oinfo->oi_oa = &repbody->oa;
         oinfo->oi_capa = capa;
 
-        req->rq_status = obd_getattr(exp, oinfo);
+        req->rq_status = obd_getattr(req->rq_svc_thread->t_env, exp, oinfo);
 
         OBD_FREE_PTR(oinfo);
 
-        repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-        repbody->oa = body->oa;
         ost_drop_id(exp, &repbody->oa);
 
 unlock:
         ost_lock_put(exp, &lh, LCK_PR);
-
-        RETURN(0);
+        RETURN(rc);
 }
 
 static int ost_statfs(struct ptlrpc_request *req)
@@ -311,7 +307,8 @@ static int ost_statfs(struct ptlrpc_request *req)
 
         osfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
 
-        req->rq_status = obd_statfs(req->rq_export->exp_obd, osfs,
+        req->rq_status = obd_statfs(req->rq_svc_thread->t_env, req->rq_export,
+                                    osfs,
                                     cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
                                     0);
         if (req->rq_status != 0)
@@ -343,7 +340,8 @@ static int ost_create(struct obd_export *exp, struct ptlrpc_request *req,
         repbody->oa = body->oa;
         oti->oti_logcookies = &body->oa.o_lcookie;
 
-        req->rq_status = obd_create(exp, &repbody->oa, NULL, oti);
+        req->rq_status = obd_create(req->rq_svc_thread->t_env, exp,
+                                    &repbody->oa, NULL, oti);
         //obd_log_cancel(conn, NULL, 1, oti->oti_logcookies, 0);
         RETURN(0);
 }
@@ -380,22 +378,25 @@ static int ost_punch(struct obd_export *exp, struct ptlrpc_request *req,
         if (body->oa.o_size == 0)
                 flags |= LDLM_AST_DISCARD_DATA;
 
-        rc = ost_lock_get(exp, &body->oa, body->oa.o_size, body->oa.o_blocks,
-                          &lh, LCK_PW, flags);
+        repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+        repbody->oa = body->oa;
+
+        rc = ost_lock_get(exp, &repbody->oa, repbody->oa.o_size,
+                          repbody->oa.o_blocks, &lh, LCK_PW, flags);
         if (rc == 0) {
                 struct obd_info *oinfo;
                 struct lustre_capa *capa = NULL;
 
-                if (body->oa.o_valid & OBD_MD_FLFLAGS &&
-                    body->oa.o_flags == OBD_FL_SRVLOCK)
+                if (repbody->oa.o_valid & OBD_MD_FLFLAGS &&
+                    repbody->oa.o_flags == OBD_FL_SRVLOCK)
                         /*
                          * If OBD_FL_SRVLOCK is the only bit set in
                          * ->o_flags, clear OBD_MD_FLFLAGS to avoid falling
                          * through filter_setattr() to filter_iocontrol().
                          */
-                        body->oa.o_valid &= ~OBD_MD_FLFLAGS;
+                        repbody->oa.o_valid &= ~OBD_MD_FLFLAGS;
 
-                if (body->oa.o_valid & OBD_MD_FLOSSCAPA) {
+                if (repbody->oa.o_valid & OBD_MD_FLOSSCAPA) {
                         capa = req_capsule_client_get(&req->rq_pill,
                                                       &RMF_CAPA1);
                         if (capa == NULL) {
@@ -407,24 +408,25 @@ static int ost_punch(struct obd_export *exp, struct ptlrpc_request *req,
                 OBD_ALLOC_PTR(oinfo);
                 if (!oinfo)
                         GOTO(unlock, rc = -ENOMEM);
-                oinfo->oi_oa = &body->oa;
+                oinfo->oi_oa = &repbody->oa;
                 oinfo->oi_policy.l_extent.start = oinfo->oi_oa->o_size;
                 oinfo->oi_policy.l_extent.end = oinfo->oi_oa->o_blocks;
                 oinfo->oi_capa = capa;
+                oinfo->oi_flags = OBD_FL_PUNCH;
 
-                req->rq_status = obd_punch(exp, oinfo, oti, NULL);
+                req->rq_status = obd_punch(req->rq_svc_thread->t_env, exp,
+                                           oinfo, oti, NULL);
                 OBD_FREE_PTR(oinfo);
 unlock:
                 ost_lock_put(exp, &lh, LCK_PW);
         }
 
-        repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-        repbody->oa = body->oa;
         ost_drop_id(exp, &repbody->oa);
         RETURN(rc);
 }
 
-static int ost_sync(struct obd_export *exp, struct ptlrpc_request *req)
+static int ost_sync(struct obd_export *exp, struct ptlrpc_request *req,
+                   struct obd_trans_info *oti)
 {
         struct ost_body *body, *repbody;
         struct obd_info *oinfo;
@@ -452,18 +454,21 @@ static int ost_sync(struct obd_export *exp, struct ptlrpc_request *req)
         if (rc)
                 RETURN(rc);
 
+        repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+        repbody->oa = body->oa;
+
         OBD_ALLOC_PTR(oinfo);
         if (!oinfo)
                 RETURN(-ENOMEM);
 
-        oinfo->oi_oa = &body->oa;
+        oinfo->oi_oa = &repbody->oa;
         oinfo->oi_capa = capa;
-        req->rq_status = obd_sync(exp, oinfo, body->oa.o_size,
-                                  body->oa.o_blocks, NULL);
+       oinfo->oi_jobid = oti->oti_jobid;
+        req->rq_status = obd_sync(req->rq_svc_thread->t_env, exp, oinfo,
+                                  repbody->oa.o_size, repbody->oa.o_blocks,
+                                  NULL);
         OBD_FREE_PTR(oinfo);
 
-        repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-        repbody->oa = body->oa;
         ost_drop_id(exp, &repbody->oa);
         RETURN(0);
 }
@@ -497,62 +502,76 @@ static int ost_setattr(struct obd_export *exp, struct ptlrpc_request *req,
                 }
         }
 
+        repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+        repbody->oa = body->oa;
+
         OBD_ALLOC_PTR(oinfo);
         if (!oinfo)
                 RETURN(-ENOMEM);
-        oinfo->oi_oa = &body->oa;
+        oinfo->oi_oa = &repbody->oa;
         oinfo->oi_capa = capa;
 
-        req->rq_status = obd_setattr(exp, oinfo, oti);
+        req->rq_status = obd_setattr(req->rq_svc_thread->t_env, exp, oinfo,
+                                     oti);
 
         OBD_FREE_PTR(oinfo);
 
-        repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-        repbody->oa = body->oa;
         ost_drop_id(exp, &repbody->oa);
         RETURN(0);
 }
 
-static int ost_bulk_timeout(void *data)
-{
-        ENTRY;
-        /* We don't fail the connection here, because having the export
-         * killed makes the (vital) call to commitrw very sad.
-         */
-        RETURN(1);
-}
-
 static __u32 ost_checksum_bulk(struct ptlrpc_bulk_desc *desc, int opc,
-                               cksum_type_t cksum_type)
+                              cksum_type_t cksum_type)
 {
-        __u32 cksum;
-        int i;
-
-        cksum = init_checksum(cksum_type);
-        for (i = 0; i < desc->bd_iov_count; i++) {
-                struct page *page = desc->bd_iov[i].kiov_page;
-                int off = desc->bd_iov[i].kiov_offset & ~CFS_PAGE_MASK;
-                char *ptr = kmap(page) + off;
-                int len = desc->bd_iov[i].kiov_len;
-
-                /* corrupt the data before we compute the checksum, to
-                 * simulate a client->OST data error */
-                if (i == 0 && opc == OST_WRITE &&
-                    OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE))
-                        memcpy(ptr, "bad3", min(4, len));
-                cksum = compute_checksum(cksum, ptr, len, cksum_type);
-                /* corrupt the data after we compute the checksum, to
-                 * simulate an OST->client data error */
-                if (i == 0 && opc == OST_READ &&
-                    OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) {
-                        memcpy(ptr, "bad4", min(4, len));
-                        /* nobody should use corrupted page again */
-                        ClearPageUptodate(page);
-                }
-                kunmap(page);
-        }
-
-        return cksum;
+       struct cfs_crypto_hash_desc     *hdesc;
+       unsigned int                    bufsize;
+       int                             i, err;
+       unsigned char                   cfs_alg = cksum_obd2cfs(cksum_type);
+       __u32                           cksum;
+
+       hdesc = cfs_crypto_hash_init(cfs_alg, NULL, 0);
+       if (IS_ERR(hdesc)) {
+               CERROR("Unable to initialize checksum hash %s\n",
+                      cfs_crypto_hash_name(cfs_alg));
+               return PTR_ERR(hdesc);
+       }
+       CDEBUG(D_INFO, "Checksum for algo %s\n", cfs_crypto_hash_name(cfs_alg));
+       for (i = 0; i < desc->bd_iov_count; i++) {
+
+               /* corrupt the data before we compute the checksum, to
+                * simulate a client->OST data error */
+               if (i == 0 && opc == OST_WRITE &&
+                   OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
+                       int off = desc->bd_iov[i].kiov_offset & ~CFS_PAGE_MASK;
+                       int len = desc->bd_iov[i].kiov_len;
+                       char *ptr = kmap(desc->bd_iov[i].kiov_page) + off;
+                       memcpy(ptr, "bad3", min(4, len));
+                       kunmap(desc->bd_iov[i].kiov_page);
+               }
+               cfs_crypto_hash_update_page(hdesc, desc->bd_iov[i].kiov_page,
+                                 desc->bd_iov[i].kiov_offset & ~CFS_PAGE_MASK,
+                                 desc->bd_iov[i].kiov_len);
+
+                /* corrupt the data after we compute the checksum, to
+                * simulate an OST->client data error */
+               if (i == 0 && opc == OST_READ &&
+                   OBD_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) {
+                       int off = desc->bd_iov[i].kiov_offset & ~CFS_PAGE_MASK;
+                       int len = desc->bd_iov[i].kiov_len;
+                       char *ptr = kmap(desc->bd_iov[i].kiov_page) + off;
+                       memcpy(ptr, "bad4", min(4, len));
+                       kunmap(desc->bd_iov[i].kiov_page);
+                       /* nobody should use corrupted page again */
+                       ClearPageUptodate(desc->bd_iov[i].kiov_page);
+               }
+       }
+
+       bufsize = 4;
+       err = cfs_crypto_hash_final(hdesc, (unsigned char *)&cksum, &bufsize);
+       if (err)
+               cfs_crypto_hash_final(hdesc, NULL, NULL);
+
+       return cksum;
 }
 
 static int ost_brw_lock_get(int mode, struct obd_export *exp,
@@ -601,124 +620,6 @@ static void ost_brw_lock_put(int mode,
         EXIT;
 }
 
-struct ost_prolong_data {
-        struct obd_export *opd_exp;
-        ldlm_policy_data_t opd_policy;
-        struct obdo *opd_oa;
-        ldlm_mode_t opd_mode;
-        int opd_lock_match;
-        int opd_timeout;
-};
-
-static int ost_prolong_locks_iter(struct ldlm_lock *lock, void *data)
-{
-        struct ost_prolong_data *opd = data;
-
-        LASSERT(lock->l_resource->lr_type == LDLM_EXTENT);
-
-        if (lock->l_req_mode != lock->l_granted_mode) {
-                /* scan granted locks only */
-                return LDLM_ITER_STOP;
-        }
-
-        if (lock->l_export != opd->opd_exp) {
-                /* prolong locks only for given client */
-                return LDLM_ITER_CONTINUE;
-        }
-
-        if (!(lock->l_granted_mode & opd->opd_mode)) {
-                /* we aren't interesting in all type of locks */
-                return LDLM_ITER_CONTINUE;
-        }
-
-        if (lock->l_policy_data.l_extent.end < opd->opd_policy.l_extent.start ||
-            lock->l_policy_data.l_extent.start > opd->opd_policy.l_extent.end) {
-                /* the request doesn't cross the lock, skip it */
-                return LDLM_ITER_CONTINUE;
-        }
-
-        /* Fill the obdo with the matched lock handle.
-         * XXX: it is possible in some cases the IO RPC is covered by several
-         * locks, even for the write case, so it may need to be a lock list. */
-        if (opd->opd_oa && !(opd->opd_oa->o_valid & OBD_MD_FLHANDLE)) {
-                opd->opd_oa->o_handle.cookie = lock->l_handle.h_cookie;
-                opd->opd_oa->o_valid |= OBD_MD_FLHANDLE;
-        }
-
-        if (!(lock->l_flags & LDLM_FL_AST_SENT)) {
-                /* ignore locks not being cancelled */
-                return LDLM_ITER_CONTINUE;
-        }
-
-        CDEBUG(D_DLMTRACE,"refresh lock: "LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
-               lock->l_resource->lr_name.name[0],
-               lock->l_resource->lr_name.name[1],
-               opd->opd_policy.l_extent.start, opd->opd_policy.l_extent.end);
-        /* OK. this is a possible lock the user holds doing I/O
-         * let's refresh eviction timer for it */
-        ldlm_refresh_waiting_lock(lock, opd->opd_timeout);
-        opd->opd_lock_match = 1;
-
-        return LDLM_ITER_CONTINUE;
-}
-
-static int ost_rw_prolong_locks(struct ptlrpc_request *req, struct obd_ioobj *obj,
-                                struct niobuf_remote *nb, struct obdo *oa,
-                                ldlm_mode_t mode)
-{
-        struct ldlm_res_id res_id;
-        int nrbufs = obj->ioo_bufcnt;
-        struct ost_prolong_data opd = { 0 };
-        ENTRY;
-
-        osc_build_res_name(obj->ioo_id, obj->ioo_seq, &res_id);
-
-        opd.opd_mode = mode;
-        opd.opd_exp = req->rq_export;
-        opd.opd_policy.l_extent.start = nb[0].offset & CFS_PAGE_MASK;
-        opd.opd_policy.l_extent.end = (nb[nrbufs - 1].offset +
-                                       nb[nrbufs - 1].len - 1) | ~CFS_PAGE_MASK;
-
-        /* prolong locks for the current service time of the corresponding
-         * portal (= OST_IO_PORTAL) */
-        opd.opd_timeout = AT_OFF ? obd_timeout / 2:
-                          max(at_est2timeout(at_get(&req->rq_rqbd->
-                              rqbd_service->srv_at_estimate)), ldlm_timeout);
-
-        CDEBUG(D_INFO,"refresh locks: "LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
-               res_id.name[0], res_id.name[1], opd.opd_policy.l_extent.start,
-               opd.opd_policy.l_extent.end);
-
-        if (oa->o_valid & OBD_MD_FLHANDLE) {
-                struct ldlm_lock *lock;
-
-                lock = ldlm_handle2lock(&oa->o_handle);
-                if (lock != NULL) {
-                        ost_prolong_locks_iter(lock, &opd);
-                        if (opd.opd_lock_match) {
-                                LDLM_LOCK_PUT(lock);
-                                RETURN(1);
-                        }
-
-                        /* Check if the lock covers the whole IO region,
-                         * otherwise iterate through the resource. */
-                        if (lock->l_policy_data.l_extent.end >=
-                            opd.opd_policy.l_extent.end &&
-                            lock->l_policy_data.l_extent.start <=
-                            opd.opd_policy.l_extent.start) {
-                                LDLM_LOCK_PUT(lock);
-                                RETURN(0);
-                        }
-                        LDLM_LOCK_PUT(lock);
-                }
-        }
-
-        opd.opd_oa = oa;
-        ldlm_resource_iterate(req->rq_export->exp_obd->obd_namespace, &res_id,
-                              ost_prolong_locks_iter, &opd);
-        RETURN(opd.opd_lock_match);
-}
-
 /* Allocate thread local buffers if needed */
 static struct ost_thread_local_cache *ost_tls_get(struct ptlrpc_request *r)
 {
@@ -850,9 +751,13 @@ static int ost_brw_read(struct ptlrpc_request *req, struct obd_trans_info *oti)
                 GOTO(out_lock, rc = -ETIMEDOUT);
         }
 
+        repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+        memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
+
         npages = OST_THREAD_POOL_SIZE;
-        rc = obd_preprw(OBD_BRW_READ, exp, &body->oa, 1, ioo,
-                        remote_nb, &npages, local_nb, oti, capa);
+        rc = obd_preprw(req->rq_svc_thread->t_env, OBD_BRW_READ, exp,
+                        &repbody->oa, 1, ioo, remote_nb, &npages, local_nb,
+                        oti, capa);
         if (rc != 0)
                 GOTO(out_lock, rc);
 
@@ -861,12 +766,6 @@ static int ost_brw_read(struct ptlrpc_request *req, struct obd_trans_info *oti)
         if (desc == NULL)
                 GOTO(out_commitrw, rc = -ENOMEM);
 
-        if (!lustre_handle_is_used(&lockh))
-                /* no needs to try to prolong lock if server is asked
-                 * to handle locking (= OBD_BRW_SRVLOCK) */
-                ost_rw_prolong_locks(req, ioo, remote_nb, &body->oa,
-                                     LCK_PW | LCK_PR);
-
         nob = 0;
         for (i = 0; i < npages; i++) {
                 int page_rc = local_nb[i].rc;
@@ -893,112 +792,42 @@ static int ost_brw_read(struct ptlrpc_request *req, struct obd_trans_info *oti)
         }
 
         if (body->oa.o_valid & OBD_MD_FLCKSUM) {
-                cksum_type_t cksum_type = OBD_CKSUM_CRC32;
-
-                if (body->oa.o_valid & OBD_MD_FLFLAGS)
-                        cksum_type = cksum_type_unpack(body->oa.o_flags);
-                body->oa.o_flags = cksum_type_pack(cksum_type);
-                body->oa.o_valid = OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
-                body->oa.o_cksum = ost_checksum_bulk(desc, OST_READ, cksum_type);
-                CDEBUG(D_PAGE,"checksum at read origin: %x\n",body->oa.o_cksum);
+                cksum_type_t cksum_type =
+                        cksum_type_unpack(repbody->oa.o_valid & OBD_MD_FLFLAGS ?
+                                          repbody->oa.o_flags : 0);
+                repbody->oa.o_flags = cksum_type_pack(cksum_type);
+                repbody->oa.o_valid = OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
+                repbody->oa.o_cksum = ost_checksum_bulk(desc, OST_READ,cksum_type);
+                CDEBUG(D_PAGE, "checksum at read origin: %x\n",
+                       repbody->oa.o_cksum);
         } else {
-                body->oa.o_valid = 0;
+                repbody->oa.o_valid = 0;
         }
         /* We're finishing using body->oa as an input variable */
 
         /* Check if client was evicted while we were doing i/o before touching
            network */
         if (rc == 0) {
-                /* Check if there is eviction in progress, and if so, wait for
-                 * it to finish */
-                if (unlikely(cfs_atomic_read(&exp->exp_obd->
-                                             obd_evict_inprogress))) {
-                        lwi = LWI_INTR(NULL, NULL);
-                        rc = l_wait_event(exp->exp_obd->
-                                          obd_evict_inprogress_waitq,
-                                          !cfs_atomic_read(&exp->exp_obd->
-                                          obd_evict_inprogress),
-                                          &lwi);
-                }
-                /* Check if client was evicted or tried to reconnect already */
-                if (exp->exp_failed || exp->exp_abort_active_req)
-                        rc = -ENOTCONN;
-                else {
-                        rc = sptlrpc_svc_wrap_bulk(req, desc);
-                        if (rc == 0)
-                                rc = ptlrpc_start_bulk_transfer(desc);
-                }
-
-                if (rc == 0) {
-                        time_t start = cfs_time_current_sec();
-                        do {
-                                long timeoutl = req->rq_deadline -
-                                        cfs_time_current_sec();
-                                cfs_duration_t timeout = timeoutl <= 0 ?
-                                        CFS_TICK : cfs_time_seconds(timeoutl);
-                                lwi = LWI_TIMEOUT_INTERVAL(timeout,
-                                                           cfs_time_seconds(1),
-                                                           ost_bulk_timeout,
-                                                           desc);
-                                rc = l_wait_event(desc->bd_waitq,
-                                                  !ptlrpc_server_bulk_active(desc) ||
-                                                  exp->exp_failed ||
-                                                  exp->exp_abort_active_req,
-                                                  &lwi);
-                                LASSERT(rc == 0 || rc == -ETIMEDOUT);
-                                /* Wait again if we changed deadline */
-                        } while ((rc == -ETIMEDOUT) &&
-                                 (req->rq_deadline > cfs_time_current_sec()));
-
-                        if (rc == -ETIMEDOUT) {
-                                DEBUG_REQ(D_ERROR, req,
-                                          "timeout on bulk PUT after %ld%+lds",
-                                          req->rq_deadline - start,
-                                          cfs_time_current_sec() -
-                                          req->rq_deadline);
-                                ptlrpc_abort_bulk(desc);
-                        } else if (exp->exp_failed) {
-                                DEBUG_REQ(D_ERROR, req, "Eviction on bulk PUT");
-                                rc = -ENOTCONN;
-                                ptlrpc_abort_bulk(desc);
-                        } else if (exp->exp_abort_active_req) {
-                                DEBUG_REQ(D_ERROR, req, "Reconnect on bulk PUT");
-                                /* we don't reply anyway */
-                                rc = -ETIMEDOUT;
-                                ptlrpc_abort_bulk(desc);
-                        } else if (!desc->bd_success ||
-                                   desc->bd_nob_transferred != desc->bd_nob) {
-                                DEBUG_REQ(D_ERROR, req, "%s bulk PUT %d(%d)",
-                                          desc->bd_success ?
-                                          "truncated" : "network error on",
-                                          desc->bd_nob_transferred,
-                                          desc->bd_nob);
-                                /* XXX should this be a different errno? */
-                                rc = -ETIMEDOUT;
-                        }
-                } else {
-                        DEBUG_REQ(D_ERROR, req, "bulk PUT failed: rc %d", rc);
-                }
+                if (likely(!CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)))
+                        rc = target_bulk_io(exp, desc, &lwi);
                 no_reply = rc != 0;
         }
 
 out_commitrw:
         /* Must commit after prep above in all cases */
-        rc = obd_commitrw(OBD_BRW_READ, exp, &body->oa, 1, ioo,
-                          remote_nb, npages, local_nb, oti, rc);
+        rc = obd_commitrw(req->rq_svc_thread->t_env, OBD_BRW_READ, exp,
+                          &repbody->oa, 1, ioo, remote_nb, npages, local_nb,
+                          oti, rc);
 
-        if (rc == 0) {
-                repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-                memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
+        if (rc == 0)
                 ost_drop_id(exp, &repbody->oa);
-        }
 
 out_lock:
         ost_brw_lock_put(LCK_PR, ioo, remote_nb, &lockh);
 out_tls:
         ost_tls_put(req);
 out_bulk:
-        if (desc)
+        if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))
                 ptlrpc_free_bulk(desc);
 out:
         LASSERT(rc <= 0);
@@ -1015,12 +844,25 @@ out:
         } else {
                 /* reply out callback would free */
                 ptlrpc_req_drop_rs(req);
-                CWARN("%s: ignoring bulk IO comm error with %s@%s id %s - "
-                      "client will retry\n",
-                      exp->exp_obd->obd_name,
-                      exp->exp_client_uuid.uuid,
-                      exp->exp_connection->c_remote_uuid.uuid,
-                      libcfs_id2str(req->rq_peer));
+                LCONSOLE_WARN("%s: Bulk IO read error with %s (at %s), "
+                              "client will retry: rc %d\n",
+                              exp->exp_obd->obd_name,
+                              obd_uuid2str(&exp->exp_client_uuid),
+                              obd_export_nid2str(exp), rc);
+        }
+        /* send a bulk after reply to simulate a network delay or reordering
+         * by a router */
+        if (unlikely(CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))) {
+                cfs_waitq_t              waitq;
+                struct l_wait_info       lwi1;
+
+                CDEBUG(D_INFO, "reorder BULK\n");
+                cfs_waitq_init(&waitq);
+
+                lwi1 = LWI_TIMEOUT_INTR(cfs_time_seconds(3), NULL, NULL, NULL);
+                l_wait_event(waitq, 0, &lwi1);
+                rc = target_bulk_io(exp, desc, &lwi);
+                ptlrpc_free_bulk(desc);
         }
 
         RETURN(rc);
@@ -1057,17 +899,6 @@ static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
         /* pause before transaction has been started */
         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, (obd_timeout + 1) / 4);
 
-        /* Check if there is eviction in progress, and if so, wait for it to
-         * finish */
-        if (unlikely(cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress))) {
-                lwi = LWI_INTR(NULL, NULL); // We do not care how long it takes
-                rc = l_wait_event(exp->exp_obd->obd_evict_inprogress_waitq,
-                        !cfs_atomic_read(&exp->exp_obd->obd_evict_inprogress),
-                        &lwi);
-        }
-        if (exp->exp_failed)
-                GOTO(out, rc = -ENOTCONN);
-
         /* ost_body, ioobj & noibuf_remote are verified and swabbed in
          * ost_rw_hpreq_check(). */
         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
@@ -1141,11 +972,6 @@ static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
                 GOTO(out_lock, rc = -ETIMEDOUT);
         }
 
-        if (!lustre_handle_is_used(&lockh))
-                /* no needs to try to prolong lock if server is asked
-                 * to handle locking (= OBD_BRW_SRVLOCK) */
-                ost_rw_prolong_locks(req, ioo, remote_nb,&body->oa,  LCK_PW);
-
         /* obd_preprw clobbers oa->valid, so save what we need */
         if (body->oa.o_valid & OBD_MD_FLCKSUM) {
                 client_cksum = body->oa.o_cksum;
@@ -1167,9 +993,14 @@ static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
                 o_uid = body->oa.o_uid;
                 o_gid = body->oa.o_gid;
         }
+
+        repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+        memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
+
         npages = OST_THREAD_POOL_SIZE;
-        rc = obd_preprw(OBD_BRW_WRITE, exp, &body->oa, objcount,
-                        ioo, remote_nb, &npages, local_nb, oti, capa);
+        rc = obd_preprw(req->rq_svc_thread->t_env, OBD_BRW_WRITE, exp,
+                        &repbody->oa, objcount, ioo, remote_nb, &npages,
+                        local_nb, oti, capa);
         if (rc != 0)
                 GOTO(out_lock, rc);
 
@@ -1189,65 +1020,11 @@ static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
         if (rc != 0)
                 GOTO(out_lock, rc);
 
-        /* Check if client was evicted or tried to reconnect while we
-         * were doing i/o before touching network */
-        if (desc->bd_export->exp_failed ||
-            desc->bd_export->exp_abort_active_req)
-                rc = -ENOTCONN;
-        else
-                rc = ptlrpc_start_bulk_transfer(desc);
-        if (rc == 0) {
-                time_t start = cfs_time_current_sec();
-                do {
-                        long timeoutl = req->rq_deadline -
-                                cfs_time_current_sec();
-                        cfs_duration_t timeout = timeoutl <= 0 ?
-                                CFS_TICK : cfs_time_seconds(timeoutl);
-                        lwi = LWI_TIMEOUT_INTERVAL(timeout, cfs_time_seconds(1),
-                                                   ost_bulk_timeout, desc);
-                        rc = l_wait_event(desc->bd_waitq,
-                                          !ptlrpc_server_bulk_active(desc) ||
-                                          desc->bd_export->exp_failed ||
-                                          desc->bd_export->exp_abort_active_req,
-                                          &lwi);
-                        LASSERT(rc == 0 || rc == -ETIMEDOUT);
-                        /* Wait again if we changed deadline */
-                } while ((rc == -ETIMEDOUT) &&
-                         (req->rq_deadline > cfs_time_current_sec()));
-
-                if (rc == -ETIMEDOUT) {
-                        DEBUG_REQ(D_ERROR, req,
-                                  "timeout on bulk GET after %ld%+lds",
-                                  req->rq_deadline - start,
-                                  cfs_time_current_sec() -
-                                  req->rq_deadline);
-                        ptlrpc_abort_bulk(desc);
-                } else if (desc->bd_export->exp_failed) {
-                        DEBUG_REQ(D_ERROR, req, "Eviction on bulk GET");
-                        rc = -ENOTCONN;
-                        ptlrpc_abort_bulk(desc);
-                } else if (desc->bd_export->exp_abort_active_req) {
-                        DEBUG_REQ(D_ERROR, req, "Reconnect on bulk GET");
-                        /* we don't reply anyway */
-                        rc = -ETIMEDOUT;
-                        ptlrpc_abort_bulk(desc);
-                } else if (!desc->bd_success) {
-                        DEBUG_REQ(D_ERROR, req, "network error on bulk GET");
-                        /* XXX should this be a different errno? */
-                        rc = -ETIMEDOUT;
-                } else {
-                        rc = sptlrpc_svc_unwrap_bulk(req, desc);
-                }
-        } else {
-                DEBUG_REQ(D_ERROR, req, "ptlrpc_bulk_get failed: rc %d", rc);
-        }
+        rc = target_bulk_io(exp, desc, &lwi);
         no_reply = rc != 0;
 
 skip_transfer:
-        repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
-        memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
-
-        if (unlikely(client_cksum != 0 && rc == 0)) {
+        if (client_cksum != 0 && rc == 0) {
                 static int cksum_counter;
                 repbody->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
                 repbody->oa.o_flags &= ~OBD_FL_CKSUM_ALL;
@@ -1268,8 +1045,9 @@ skip_transfer:
         }
 
         /* Must commit after prep above in all cases */
-        rc = obd_commitrw(OBD_BRW_WRITE, exp, &repbody->oa, objcount, ioo,
-                          remote_nb, npages, local_nb, oti, rc);
+        rc = obd_commitrw(req->rq_svc_thread->t_env, OBD_BRW_WRITE, exp,
+                          &repbody->oa, objcount, ioo, remote_nb, npages,
+                          local_nb, oti, rc);
         if (rc == -ENOTCONN)
                 /* quota acquire process has been given up because
                  * either the client has been evicted or the client
@@ -1288,7 +1066,7 @@ skip_transfer:
          */
         repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
 
-        if (unlikely(client_cksum != server_cksum && rc == 0 &&  !mmap)) {
+        if (unlikely(client_cksum != server_cksum && rc == 0 && !mmap)) {
                 int  new_cksum = ost_checksum_bulk(desc, OST_WRITE, cksum_type);
                 char *msg;
                 char *via;
@@ -1373,12 +1151,11 @@ out:
         } else {
                 /* reply out callback would free */
                 ptlrpc_req_drop_rs(req);
-                CWARN("%s: ignoring bulk IO comm error with %s@%s id %s - "
-                      "client will retry\n",
-                      exp->exp_obd->obd_name,
-                      exp->exp_client_uuid.uuid,
-                      exp->exp_connection->c_remote_uuid.uuid,
-                      libcfs_id2str(req->rq_peer));
+                LCONSOLE_WARN("%s: Bulk IO write error with %s (at %s), "
+                              "client will retry: rc %d\n",
+                              exp->exp_obd->obd_name,
+                              obd_uuid2str(&exp->exp_client_uuid),
+                              obd_export_nid2str(exp), rc);
         }
         cfs_memory_pressure_clr();
         RETURN(rc);
@@ -1456,7 +1233,8 @@ static int ost_set_info(struct obd_export *exp, struct ptlrpc_request *req)
 
         /* OBD will also check if KEY_IS(KEY_GRANT_SHRINK), and will cast val to
          * a struct ost_body * value */
-        rc = obd_set_info_async(exp, keylen, key, vallen, val, NULL);
+        rc = obd_set_info_async(req->rq_svc_thread->t_env, exp, keylen,
+                                key, vallen, val, NULL);
 out:
         lustre_msg_set_status(req->rq_repmsg, 0);
         RETURN(rc);
@@ -1486,7 +1264,8 @@ static int ost_get_info(struct obd_export *exp, struct ptlrpc_request *req)
                         RETURN(rc);
         }
 
-        rc = obd_get_info(exp, keylen, key, &replylen, NULL, NULL);
+        rc = obd_get_info(req->rq_svc_thread->t_env, exp, keylen, key,
+                          &replylen, NULL, NULL);
         if (rc)
                 RETURN(rc);
 
@@ -1502,7 +1281,8 @@ static int ost_get_info(struct obd_export *exp, struct ptlrpc_request *req)
                 RETURN(-ENOMEM);
 
         /* call again to fill in the reply buffer */
-        rc = obd_get_info(exp, keylen, key, &replylen, reply, NULL);
+        rc = obd_get_info(req->rq_svc_thread->t_env, exp, keylen, key,
+                          &replylen, reply, NULL);
 
         lustre_msg_set_status(req->rq_repmsg, 0);
         RETURN(rc);
@@ -1772,7 +1552,7 @@ int ost_blocking_ast(struct ldlm_lock *lock,
         int rc = 0;
         ENTRY;
 
-        rc = obd_get_info(lock->l_export, sizeof(KEY_SYNC_LOCK_CANCEL),
+        rc = obd_get_info(NULL, lock->l_export, sizeof(KEY_SYNC_LOCK_CANCEL),
                           KEY_SYNC_LOCK_CANCEL, &len, &sync_lock_cancel, NULL);
 
         if (!rc && flag == LDLM_CB_CANCELING &&
@@ -1797,7 +1577,7 @@ int ost_blocking_ast(struct ldlm_lock *lock,
                 oa->o_valid = OBD_MD_FLID|OBD_MD_FLGROUP;
                 oinfo->oi_oa = oa;
 
-                rc = obd_sync(lock->l_export, oinfo,
+                rc = obd_sync(NULL, lock->l_export, oinfo,
                               lock->l_policy_data.l_extent.start,
                               lock->l_policy_data.l_extent.end, NULL);
                 if (rc)
@@ -1833,7 +1613,7 @@ static int ost_filter_recovery_request(struct ptlrpc_request *req,
                 RETURN(0);
 
         default:
-                DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
+                DEBUG_REQ(D_WARNING, req, "not permitted during recovery");
                 *process = -EAGAIN;
                 RETURN(0);
         }
@@ -1908,6 +1688,103 @@ int ost_msg_check_version(struct lustre_msg *msg)
         return rc;
 }
 
+struct ost_prolong_data {
+        struct ptlrpc_request *opd_req;
+        struct obd_export     *opd_exp;
+        struct obdo           *opd_oa;
+        struct ldlm_res_id     opd_resid;
+        struct ldlm_extent     opd_extent;
+        ldlm_mode_t            opd_mode;
+        unsigned int           opd_locks;
+        int                    opd_timeout;
+};
+
+/* prolong locks for the current service time of the corresponding
+ * portal (= OST_IO_PORTAL)
+ */
+static inline int prolong_timeout(struct ptlrpc_request *req)
+{
+        struct ptlrpc_service *svc = req->rq_rqbd->rqbd_service;
+
+        if (AT_OFF)
+                return obd_timeout / 2;
+
+        return max(at_est2timeout(at_get(&svc->srv_at_estimate)), ldlm_timeout);
+}
+
+static void ost_prolong_lock_one(struct ost_prolong_data *opd,
+                                 struct ldlm_lock *lock)
+{
+       LASSERT(lock->l_export == opd->opd_exp);
+
+       if (lock->l_destroyed) /* lock already cancelled */
+               return;
+
+        /* XXX: never try to grab resource lock here because we're inside
+         * exp_bl_list_lock; in ldlm_lockd.c to handle waiting list we take
+         * res lock and then exp_bl_list_lock. */
+
+        if (!(lock->l_flags & LDLM_FL_AST_SENT))
+                /* ignore locks not being cancelled */
+                return;
+
+        LDLM_DEBUG(lock,
+                   "refreshed for req x"LPU64" ext("LPU64"->"LPU64") to %ds.\n",
+                   opd->opd_req->rq_xid, opd->opd_extent.start,
+                   opd->opd_extent.end, opd->opd_timeout);
+
+        /* OK. this is a possible lock the user holds doing I/O
+         * let's refresh eviction timer for it */
+        ldlm_refresh_waiting_lock(lock, opd->opd_timeout);
+        ++opd->opd_locks;
+}
+
+static void ost_prolong_locks(struct ost_prolong_data *data)
+{
+        struct obd_export *exp = data->opd_exp;
+        struct obdo       *oa  = data->opd_oa;
+        struct ldlm_lock  *lock;
+        ENTRY;
+
+        if (oa->o_valid & OBD_MD_FLHANDLE) {
+                /* mostly a request should be covered by only one lock, try
+                 * fast path. */
+                lock = ldlm_handle2lock(&oa->o_handle);
+                if (lock != NULL) {
+                        /* Fast path to check if the lock covers the whole IO
+                         * region exclusively. */
+                        if (lock->l_granted_mode == LCK_PW &&
+                            ldlm_extent_contain(&lock->l_policy_data.l_extent,
+                                                &data->opd_extent)) {
+                                /* bingo */
+                                ost_prolong_lock_one(data, lock);
+                                LDLM_LOCK_PUT(lock);
+                                RETURN_EXIT;
+                        }
+                        LDLM_LOCK_PUT(lock);
+                }
+        }
+
+
+        cfs_spin_lock_bh(&exp->exp_bl_list_lock);
+        cfs_list_for_each_entry(lock, &exp->exp_bl_list, l_exp_list) {
+                LASSERT(lock->l_flags & LDLM_FL_AST_SENT);
+                LASSERT(lock->l_resource->lr_type == LDLM_EXTENT);
+
+                if (!ldlm_res_eq(&data->opd_resid, &lock->l_resource->lr_name))
+                        continue;
+
+                if (!ldlm_extent_overlap(&lock->l_policy_data.l_extent,
+                                         &data->opd_extent))
+                        continue;
+
+                ost_prolong_lock_one(data, lock);
+        }
+        cfs_spin_unlock_bh(&exp->exp_bl_list_lock);
+
+        EXIT;
+}
+
 /**
  * Returns 1 if the given PTLRPC matches the given LDLM locks, or 0 if it does
  * not.
@@ -1917,61 +1794,35 @@ static int ost_rw_hpreq_lock_match(struct ptlrpc_request *req,
 {
         struct niobuf_remote *nb;
         struct obd_ioobj *ioo;
-        struct ost_body *body;
-        int objcount, niocount;
-        int mode, opc, i, rc;
-        __u64 start, end;
+        int mode, opc;
+        struct ldlm_extent ext;
         ENTRY;
 
         opc = lustre_msg_get_opc(req->rq_reqmsg);
         LASSERT(opc == OST_READ || opc == OST_WRITE);
 
-        /* As the request may be covered by several locks, do not look at
-         * o_handle, look at the RPC IO region. */
-        body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
-        if (body == NULL)
-                RETURN(0);
-
-        objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
-                                        RCL_CLIENT) / sizeof(*ioo);
         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
-        if (ioo == NULL)
-                RETURN(0);
-
-        rc = ost_validate_obdo(req->rq_export, &body->oa, ioo);
-        if (rc)
-                RETURN(rc);
-
-        for (niocount = i = 0; i < objcount; i++)
-                niocount += ioo[i].ioo_bufcnt;
+        LASSERT(ioo != NULL);
 
         nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
-        if (nb == NULL ||
-            niocount != (req_capsule_get_size(&req->rq_pill, &RMF_NIOBUF_REMOTE,
-            RCL_CLIENT) / sizeof(*nb)))
-                RETURN(0);
+        LASSERT(nb != NULL);
 
-        mode = LCK_PW;
-        if (opc == OST_READ)
-                mode |= LCK_PR;
-
-        start = nb[0].offset & CFS_PAGE_MASK;
-        end = (nb[ioo->ioo_bufcnt - 1].offset +
-               nb[ioo->ioo_bufcnt - 1].len - 1) | ~CFS_PAGE_MASK;
+        ext.start = nb->offset;
+        nb += ioo->ioo_bufcnt - 1;
+        ext.end = nb->offset + nb->len - 1;
 
         LASSERT(lock->l_resource != NULL);
         if (!osc_res_name_eq(ioo->ioo_id, ioo->ioo_seq,
                              &lock->l_resource->lr_name))
                 RETURN(0);
 
+        mode = LCK_PW;
+        if (opc == OST_READ)
+                mode |= LCK_PR;
         if (!(lock->l_granted_mode & mode))
                 RETURN(0);
 
-        if (lock->l_policy_data.l_extent.end < start ||
-            lock->l_policy_data.l_extent.start > end)
-                RETURN(0);
-
-        RETURN(1);
+        RETURN(ldlm_extent_overlap(&lock->l_policy_data.l_extent, &ext));
 }
 
 /**
@@ -1986,78 +1837,62 @@ static int ost_rw_hpreq_lock_match(struct ptlrpc_request *req,
  */
 static int ost_rw_hpreq_check(struct ptlrpc_request *req)
 {
-        struct niobuf_remote *nb;
-        struct obd_ioobj *ioo;
+        struct obd_device *obd = req->rq_export->exp_obd;
         struct ost_body *body;
-        int objcount, niocount;
-        int mode, opc, i, rc;
+        struct obd_ioobj *ioo;
+        struct niobuf_remote *nb;
+        struct ost_prolong_data opd = { 0 };
+        int mode, opc;
         ENTRY;
 
+        /*
+         * Use LASSERT to do sanity check because malformed RPCs should have
+         * been filtered out in ost_hpreq_handler().
+         */
         opc = lustre_msg_get_opc(req->rq_reqmsg);
         LASSERT(opc == OST_READ || opc == OST_WRITE);
 
         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
-        if (body == NULL)
-                RETURN(-EFAULT);
+        LASSERT(body != NULL);
 
-        objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
-                                        RCL_CLIENT) / sizeof(*ioo);
         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
-        if (ioo == NULL)
-                RETURN(-EFAULT);
+        LASSERT(ioo != NULL);
 
-        rc = ost_validate_obdo(req->rq_export, &body->oa, ioo);
-        if (rc)
-                RETURN(rc);
-
-        for (niocount = i = 0; i < objcount; i++)
-                niocount += ioo[i].ioo_bufcnt;
         nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
-        if (nb == NULL ||
-            niocount != (req_capsule_get_size(&req->rq_pill, &RMF_NIOBUF_REMOTE,
-            RCL_CLIENT) / sizeof(*nb)))
-                RETURN(-EFAULT);
-        if (niocount != 0 && (nb[0].flags & OBD_BRW_SRVLOCK))
-                RETURN(-EFAULT);
+        LASSERT(nb != NULL);
+        LASSERT(!(nb->flags & OBD_BRW_SRVLOCK));
+
+        osc_build_res_name(ioo->ioo_id, ioo->ioo_seq, &opd.opd_resid);
 
+        opd.opd_req = req;
         mode = LCK_PW;
         if (opc == OST_READ)
                 mode |= LCK_PR;
-        RETURN(ost_rw_prolong_locks(req, ioo, nb, &body->oa, mode));
-}
+        opd.opd_mode = mode;
+        opd.opd_exp = req->rq_export;
+        opd.opd_oa  = &body->oa;
+        opd.opd_extent.start = nb->offset;
+        nb += ioo->ioo_bufcnt - 1;
+        opd.opd_extent.end = nb->offset + nb->len - 1;
+        opd.opd_timeout = prolong_timeout(req);
 
-static int ost_punch_prolong_locks(struct ptlrpc_request *req, struct obdo *oa)
-{
-        struct ldlm_res_id res_id = { .name = { oa->o_id } };
-        struct ost_prolong_data opd = { 0 };
-        __u64 start, end;
-        ENTRY;
+        DEBUG_REQ(D_RPCTRACE, req,
+               "%s %s: refresh rw locks: " LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
+               obd->obd_name, cfs_current()->comm,
+               opd.opd_resid.name[0], opd.opd_resid.name[1],
+               opd.opd_extent.start, opd.opd_extent.end);
 
-        start = oa->o_size;
-        end = start + oa->o_blocks;
+        ost_prolong_locks(&opd);
 
-        opd.opd_mode = LCK_PW;
-        opd.opd_exp = req->rq_export;
-        opd.opd_policy.l_extent.start = start & CFS_PAGE_MASK;
-        if (oa->o_blocks == OBD_OBJECT_EOF || end < start)
-                opd.opd_policy.l_extent.end = OBD_OBJECT_EOF;
-        else
-                opd.opd_policy.l_extent.end = end | ~CFS_PAGE_MASK;
-
-        /* prolong locks for the current service time of the corresponding
-         * portal (= OST_IO_PORTAL) */
-        opd.opd_timeout = AT_OFF ? obd_timeout / 2:
-                          max(at_est2timeout(at_get(&req->rq_rqbd->
-                              rqbd_service->srv_at_estimate)), ldlm_timeout);
-
-        CDEBUG(D_DLMTRACE,"refresh locks: "LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
-               res_id.name[0], res_id.name[1], opd.opd_policy.l_extent.start,
-               opd.opd_policy.l_extent.end);
-
-        opd.opd_oa = oa;
-        ldlm_resource_iterate(req->rq_export->exp_obd->obd_namespace, &res_id,
-                              ost_prolong_locks_iter, &opd);
-        RETURN(opd.opd_lock_match);
+        CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
+               obd->obd_name, opd.opd_locks, req);
+
+        RETURN(opd.opd_locks);
+}
+
+static void ost_rw_hpreq_fini(struct ptlrpc_request *req)
+{
+        (void)ost_rw_hpreq_check(req);
 }
 
 /**
@@ -2067,20 +1902,15 @@ static int ost_punch_hpreq_lock_match(struct ptlrpc_request *req,
                                       struct ldlm_lock *lock)
 {
         struct ost_body *body;
-        int rc;
         ENTRY;
 
         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
-        if (body == NULL)
-                RETURN(0);  /* can't return -EFAULT here */
-
-        rc = ost_validate_obdo(req->rq_export, &body->oa, NULL);
-        if (rc)
-                RETURN(rc);
+        LASSERT(body != NULL);
 
         if (body->oa.o_valid & OBD_MD_FLHANDLE &&
             body->oa.o_handle.cookie == lock->l_handle.h_cookie)
                 RETURN(1);
+
         RETURN(0);
 }
 
@@ -2089,31 +1919,64 @@ static int ost_punch_hpreq_lock_match(struct ptlrpc_request *req,
  */
 static int ost_punch_hpreq_check(struct ptlrpc_request *req)
 {
+        struct obd_device *obd = req->rq_export->exp_obd;
         struct ost_body *body;
-        int rc;
+        struct obdo *oa;
+        struct ost_prolong_data opd = { 0 };
+        __u64 start, end;
+        ENTRY;
 
         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
-        if (body == NULL)
-                RETURN(-EFAULT);
+        LASSERT(body != NULL);
 
-        rc = ost_validate_obdo(req->rq_export, &body->oa, NULL);
-        if (rc)
-                RETURN(rc);
+        oa = &body->oa;
+        LASSERT(!(oa->o_valid & OBD_MD_FLFLAGS) ||
+                !(oa->o_flags & OBD_FL_SRVLOCK));
+
+        start = oa->o_size;
+        end = start + oa->o_blocks;
+
+        opd.opd_req = req;
+        opd.opd_mode = LCK_PW;
+        opd.opd_exp = req->rq_export;
+        opd.opd_oa  = oa;
+        opd.opd_extent.start = start;
+        opd.opd_extent.end   = end;
+        if (oa->o_blocks == OBD_OBJECT_EOF)
+                opd.opd_extent.end = OBD_OBJECT_EOF;
+        opd.opd_timeout = prolong_timeout(req);
+
+        osc_build_res_name(oa->o_id, oa->o_seq, &opd.opd_resid);
+
+        CDEBUG(D_DLMTRACE,
+               "%s: refresh locks: "LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
+               obd->obd_name,
+               opd.opd_resid.name[0], opd.opd_resid.name[1],
+               opd.opd_extent.start, opd.opd_extent.end);
+
+        ost_prolong_locks(&opd);
+
+        CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
+               obd->obd_name, opd.opd_locks, req);
 
-        LASSERT(!(body->oa.o_valid & OBD_MD_FLFLAGS) ||
-                !(body->oa.o_flags & OBD_FL_SRVLOCK));
+        RETURN(opd.opd_locks > 0);
+}
 
-        RETURN(ost_punch_prolong_locks(req, &body->oa));
+static void ost_punch_hpreq_fini(struct ptlrpc_request *req)
+{
+        (void)ost_punch_hpreq_check(req);
 }
 
 struct ptlrpc_hpreq_ops ost_hpreq_rw = {
-        .hpreq_lock_match  = ost_rw_hpreq_lock_match,
-        .hpreq_check       = ost_rw_hpreq_check,
+        .hpreq_lock_match = ost_rw_hpreq_lock_match,
+        .hpreq_check      = ost_rw_hpreq_check,
+        .hpreq_fini       = ost_rw_hpreq_fini
 };
 
 struct ptlrpc_hpreq_ops ost_hpreq_punch = {
-        .hpreq_lock_match  = ost_punch_hpreq_lock_match,
-        .hpreq_check       = ost_punch_hpreq_check,
+        .hpreq_lock_match = ost_punch_hpreq_lock_match,
+        .hpreq_check      = ost_punch_hpreq_check,
+        .hpreq_fini       = ost_punch_hpreq_fini
 };
 
 /** Assign high priority operations to the request if needed. */
@@ -2128,6 +1991,7 @@ static int ost_hpreq_handler(struct ptlrpc_request *req)
                         struct niobuf_remote *nb;
                         struct obd_ioobj *ioo;
                         int objcount, niocount;
+                        int rc;
                         int i;
 
                         /* RPCs on the H-P queue can be inspected before
@@ -2171,6 +2035,12 @@ static int ost_hpreq_handler(struct ptlrpc_request *req)
                                 RETURN(-EFAULT);
                         }
 
+                        rc = ost_validate_obdo(req->rq_export, &body->oa, ioo);
+                        if (rc) {
+                                CERROR("invalid object ids\n");
+                                RETURN(rc);
+                        }
+
                         for (niocount = i = 0; i < objcount; i++) {
                                 if (ioo[i].ioo_bufcnt == 0) {
                                         CERROR("ioo[%d] has zero bufcnt\n", i);
@@ -2222,6 +2092,12 @@ int ost_handle(struct ptlrpc_request *req)
         struct obd_device *obd = NULL;
         ENTRY;
 
+        /* OST module is kept between remounts, but the last reference
+         * to specific module (say, osd or ofd) kills all related keys
+         * from the environment. so we have to refill it until the root
+         * cause is fixed properly */
+        lu_env_refill(req->rq_svc_thread->t_env);
+
         LASSERT(current->journal_info == NULL);
 
         /* primordial rpcs don't affect server recovery */
@@ -2265,6 +2141,10 @@ int ost_handle(struct ptlrpc_request *req)
         if (rc)
                 RETURN(rc);
 
+       if (req && req->rq_reqmsg && req->rq_export &&
+           (req->rq_export->exp_connect_flags & OBD_CONNECT_JOBSTATS))
+               oti->oti_jobid = lustre_msg_get_jobid(req->rq_reqmsg);
+
         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
         case OST_CONNECT: {
                 CDEBUG(D_INODE, "connect\n");
@@ -2379,7 +2259,7 @@ int ost_handle(struct ptlrpc_request *req)
                 req_capsule_set(&req->rq_pill, &RQF_OST_SYNC);
                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_SYNC_NET))
                         RETURN(0);
-                rc = ost_sync(req->rq_export, req);
+               rc = ost_sync(req->rq_export, req, oti);
                 break;
         case OST_SET_INFO:
                 DEBUG_REQ(D_INODE, req, "set_info");
@@ -2557,7 +2437,7 @@ static int ost_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
         lprocfs_ost_init_vars(&lvars);
         lprocfs_obd_setup(obd, lvars.obd_vars);
 
-        cfs_sema_init(&ost->ost_health_sem, 1);
+        cfs_mutex_init(&ost->ost_health_mutex);
 
         if (oss_num_threads) {
                 /* If oss_num_threads is set, it is the min and the max. */
@@ -2566,18 +2446,18 @@ static int ost_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
                 if (oss_num_threads < OSS_THREADS_MIN)
                         oss_num_threads = OSS_THREADS_MIN;
                 oss_max_threads = oss_min_threads = oss_num_threads;
-        } else {
-                /* Base min threads on memory and cpus */
-                oss_min_threads =
-                        cfs_num_possible_cpus() * CFS_NUM_CACHEPAGES >>
-                        (27 - CFS_PAGE_SHIFT);
-                if (oss_min_threads < OSS_THREADS_MIN)
-                        oss_min_threads = OSS_THREADS_MIN;
-                /* Insure a 4x range for dynamic threads */
-                if (oss_min_threads > OSS_THREADS_MAX / 4)
-                        oss_min_threads = OSS_THREADS_MAX / 4;
-                oss_max_threads = min(OSS_THREADS_MAX, oss_min_threads * 4 + 1);
-        }
+       } else {
+               /* Base min threads on memory and cpus */
+               oss_min_threads =
+                       cfs_num_online_cpus() * CFS_NUM_CACHEPAGES >>
+                       (27 - CFS_PAGE_SHIFT);
+               if (oss_min_threads < OSS_THREADS_MIN)
+                       oss_min_threads = OSS_THREADS_MIN;
+               /* Insure a 4x range for dynamic threads */
+               if (oss_min_threads > OSS_THREADS_MAX / 4)
+                       oss_min_threads = OSS_THREADS_MAX / 4;
+               oss_max_threads = min(OSS_THREADS_MAX, oss_min_threads * 4 + 1);
+       }
 
         ost->ost_service =
                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
@@ -2674,29 +2554,29 @@ static int ost_cleanup(struct obd_device *obd)
         /* there is no recovery for OST OBD, all recovery is controlled by
          * obdfilter OBD */
         LASSERT(obd->obd_recovering == 0);
-        cfs_down(&ost->ost_health_sem);
+        cfs_mutex_lock(&ost->ost_health_mutex);
         ptlrpc_unregister_service(ost->ost_service);
         ptlrpc_unregister_service(ost->ost_create_service);
         ptlrpc_unregister_service(ost->ost_io_service);
         ost->ost_service = NULL;
         ost->ost_create_service = NULL;
-        cfs_up(&ost->ost_health_sem);
+        cfs_mutex_unlock(&ost->ost_health_mutex);
 
         lprocfs_obd_cleanup(obd);
 
         RETURN(err);
 }
 
-static int ost_health_check(struct obd_device *obd)
+static int ost_health_check(const struct lu_env *env, struct obd_device *obd)
 {
         struct ost_obd *ost = &obd->u.ost;
         int rc = 0;
 
-        cfs_down(&ost->ost_health_sem);
+        cfs_mutex_lock(&ost->ost_health_mutex);
         rc |= ptlrpc_service_health_check(ost->ost_service);
         rc |= ptlrpc_service_health_check(ost->ost_create_service);
         rc |= ptlrpc_service_health_check(ost->ost_io_service);
-        cfs_up(&ost->ost_health_sem);
+        cfs_mutex_unlock(&ost->ost_health_mutex);
 
         /*
          * health_check to return 0 on healthy