Whamcloud - gitweb
LU-2756 ost: buffer utilization rate of OST rqbd
[fs/lustre-release.git] / lustre / ost / ost_handler.c
index 17a0fb2..873c23e 100644 (file)
@@ -27,7 +27,7 @@
  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2011, 2012, Whamcloud, Inc.
+ * Copyright (c) 2011, 2012, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
 #include <lustre_dlm.h>
 #include <lustre_export.h>
 #include <lustre_debug.h>
+#include <lustre_fid.h>
+#include <lustre_fld.h>
 #include <linux/init.h>
 #include <lprocfs_status.h>
 #include <libcfs/list.h>
 #include <lustre_quota.h>
+#include <lustre_fid.h>
 #include "ost_internal.h"
+#include <lustre_fid.h>
 
 static int oss_num_threads;
 CFS_MODULE_PARM(oss_num_threads, "i", int, 0444,
@@ -74,6 +78,15 @@ static char *oss_io_cpts;
 CFS_MODULE_PARM(oss_io_cpts, "s", charp, 0444,
                "CPU partitions OSS IO threads should run on");
 
+/*
+ * this page is allocated statically when module is initializing
+ * it is used to simulate data corruptions, see ost_checksum_bulk()
+ * for details. as the original pages provided by the layers below
+ * can be remain in the internal cache, we do not want to modify
+ * them.
+ */
+static struct page *ost_page_to_corrupt = NULL;
+
 /**
  * Do not return server-side uid/gid to remote client
  */
@@ -94,24 +107,35 @@ static void ost_drop_id(struct obd_export *exp, struct obdo *oa)
  *    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)
+                            struct obd_ioobj *ioobj)
 {
-        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_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);
-                return -EPROTO;
-        }
-        obdo_from_ostid(oa, &oa->o_oi);
-        if (ioobj)
-                ioobj_from_obdo(ioobj, oa);
-        return 0;
+       if (unlikely(oa != NULL && !(oa->o_valid & OBD_MD_FLGROUP))) {
+               oa->o_seq = FID_SEQ_OST_MDT0;
+               if (ioobj)
+                       ioobj->ioo_seq = FID_SEQ_OST_MDT0;
+       } else if (unlikely(oa == NULL || !(fid_seq_is_idif(oa->o_seq) ||
+                                           fid_seq_is_mdt(oa->o_seq) ||
+                                           fid_seq_is_echo(oa->o_seq)))) {
+               CERROR("%s: client %s sent bad object "POSTID": rc = -EPROTO\n",
+                      exp->exp_obd->obd_name, obd_export_nid2str(exp),
+                      oa ? oa->o_id : -1, oa ? oa->o_seq : -1);
+               return -EPROTO;
+       }
+
+       obdo_from_ostid(oa, &oa->o_oi);
+       if (ioobj != NULL) {
+               unsigned max_brw = ioobj_max_brw_get(ioobj);
+
+               if (unlikely((max_brw & (max_brw - 1)) != 0)) {
+                       CERROR("%s: client %s sent bad ioobj max %u for "POSTID
+                              ": rc = -EPROTO\n", exp->exp_obd->obd_name,
+                              obd_export_nid2str(exp), max_brw,
+                              oa->o_id, oa->o_seq);
+                       return -EPROTO;
+               }
+               ioobj_from_obdo(ioobj, oa);
+       }
+       return 0;
 }
 
 void oti_to_request(struct obd_trans_info *oti, struct ptlrpc_request *req)
@@ -203,7 +227,7 @@ static int ost_destroy(struct obd_export *exp, struct ptlrpc_request *req,
  */
 static int ost_lock_get(struct obd_export *exp, struct obdo *oa,
                         __u64 start, __u64 count, struct lustre_handle *lh,
-                        int mode, int flags)
+                       int mode, __u64 flags)
 {
         struct ldlm_res_id res_id;
         ldlm_policy_data_t policy;
@@ -222,7 +246,7 @@ static int ost_lock_get(struct obd_export *exp, struct obdo *oa,
             !(oa->o_flags & OBD_FL_SRVLOCK))
                 RETURN(0);
 
-        osc_build_res_name(oa->o_id, oa->o_seq, &res_id);
+       ostid_build_res_name(&oa->o_oi, &res_id);
         CDEBUG(D_INODE, "OST-side extent lock.\n");
 
         policy.l_extent.start = start & CFS_PAGE_MASK;
@@ -237,7 +261,8 @@ static int ost_lock_get(struct obd_export *exp, struct obdo *oa,
         RETURN(ldlm_cli_enqueue_local(exp->exp_obd->obd_namespace, &res_id,
                                       LDLM_EXTENT, &policy, mode, &flags,
                                       ldlm_blocking_ast, ldlm_completion_ast,
-                                      ldlm_glimpse_ast, NULL, 0, NULL, lh));
+                                     ldlm_glimpse_ast, NULL, 0, LVB_T_NONE,
+                                     NULL, lh));
 }
 
 /* Helper function: release lock, if any. */
@@ -361,8 +386,9 @@ static int ost_punch(struct obd_export *exp, struct ptlrpc_request *req,
                      struct obd_trans_info *oti)
 {
         struct ost_body *body, *repbody;
-        int rc, flags = 0;
+       __u64 flags = 0;
         struct lustre_handle lh = {0,};
+       int rc;
         ENTRY;
 
         /* check that we do support OBD_CONNECT_TRUNCLOCK. */
@@ -555,9 +581,19 @@ static __u32 ost_checksum_bulk(struct ptlrpc_bulk_desc *desc, int opc,
                    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;
+                       struct page *np = ost_page_to_corrupt;
                        char *ptr = kmap(desc->bd_iov[i].kiov_page) + off;
-                       memcpy(ptr, "bad3", min(4, len));
-                       kunmap(desc->bd_iov[i].kiov_page);
+
+                       if (np) {
+                               char *ptr2 = kmap(np) + off;
+
+                               memcpy(ptr2, ptr, len);
+                               memcpy(ptr2, "bad3", min(4, len));
+                               kunmap(np);
+                               desc->bd_iov[i].kiov_page = np;
+                       } else {
+                               CERROR("can't alloc page for corruption\n");
+                       }
                }
                cfs_crypto_hash_update_page(hdesc, desc->bd_iov[i].kiov_page,
                                  desc->bd_iov[i].kiov_offset & ~CFS_PAGE_MASK,
@@ -569,11 +605,19 @@ static __u32 ost_checksum_bulk(struct ptlrpc_bulk_desc *desc, int opc,
                    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;
+                       struct page *np = ost_page_to_corrupt;
                        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);
+
+                       if (np) {
+                               char *ptr2 = kmap(np) + off;
+
+                               memcpy(ptr2, ptr, len);
+                               memcpy(ptr2, "bad4", min(4, len));
+                               kunmap(np);
+                               desc->bd_iov[i].kiov_page = np;
+                       } else {
+                               CERROR("can't alloc page for corruption\n");
+                       }
                }
        }
 
@@ -589,14 +633,14 @@ static int ost_brw_lock_get(int mode, struct obd_export *exp,
                             struct obd_ioobj *obj, struct niobuf_remote *nb,
                             struct lustre_handle *lh)
 {
-        int flags                 = 0;
+       __u64 flags               = 0;
         int nrbufs                = obj->ioo_bufcnt;
         struct ldlm_res_id res_id;
         ldlm_policy_data_t policy;
         int i;
         ENTRY;
 
-        osc_build_res_name(obj->ioo_id, obj->ioo_seq, &res_id);
+       ostid_build_res_name(&obj->ioo_oid, &res_id);
         LASSERT(mode == LCK_PR || mode == LCK_PW);
         LASSERT(!lustre_handle_is_used(lh));
 
@@ -615,7 +659,8 @@ static int ost_brw_lock_get(int mode, struct obd_export *exp,
         RETURN(ldlm_cli_enqueue_local(exp->exp_obd->obd_namespace, &res_id,
                                       LDLM_EXTENT, &policy, mode, &flags,
                                       ldlm_blocking_ast, ldlm_completion_ast,
-                                      ldlm_glimpse_ast, NULL, 0, NULL, lh));
+                                     ldlm_glimpse_ast, NULL, 0, LVB_T_NONE,
+                                     NULL, lh));
 }
 
 static void ost_brw_lock_put(int mode,
@@ -639,7 +684,7 @@ static struct ost_thread_local_cache *ost_tls_get(struct ptlrpc_request *r)
 
         /* In normal mode of operation an I/O request is serviced only
          * by ll_ost_io threads each of them has own tls buffers allocated by
-         * ost_thread_init().
+         * ost_io_thread_init().
          * During recovery, an I/O request may be queued until any of the ost
          * service threads process it. Not necessary it should be one of
          * ll_ost_io threads. In that case we dynamically allocating tls
@@ -772,10 +817,10 @@ static int ost_brw_read(struct ptlrpc_request *req, struct obd_trans_info *oti)
         if (rc != 0)
                 GOTO(out_lock, rc);
 
-        desc = ptlrpc_prep_bulk_exp(req, npages,
-                                     BULK_PUT_SOURCE, OST_BULK_PORTAL);
-        if (desc == NULL)
-                GOTO(out_commitrw, rc = -ENOMEM);
+       desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
+                                   BULK_PUT_SOURCE, OST_BULK_PORTAL);
+       if (desc == NULL)
+               GOTO(out_commitrw, rc = -ENOMEM);
 
         nob = 0;
         for (i = 0; i < npages; i++) {
@@ -789,9 +834,9 @@ static int ost_brw_read(struct ptlrpc_request *req, struct obd_trans_info *oti)
                 nob += page_rc;
                 if (page_rc != 0) {             /* some data! */
                         LASSERT (local_nb[i].page != NULL);
-                        ptlrpc_prep_bulk_page(desc, local_nb[i].page,
-                                              local_nb[i].offset & ~CFS_PAGE_MASK,
-                                              page_rc);
+                       ptlrpc_prep_bulk_page_nopin(desc, local_nb[i].page,
+                                                   local_nb[i].lnb_page_offset,
+                                                   page_rc);
                 }
 
                 if (page_rc != local_nb[i].len) { /* short read */
@@ -839,7 +884,7 @@ out_tls:
         ost_tls_put(req);
 out_bulk:
         if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))
-                ptlrpc_free_bulk(desc);
+               ptlrpc_free_bulk_nopin(desc);
 out:
         LASSERT(rc <= 0);
         if (rc == 0) {
@@ -873,12 +918,59 @@ out:
                 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);
+               ptlrpc_free_bulk_nopin(desc);
         }
 
         RETURN(rc);
 }
 
+static void ost_warn_on_cksum(struct ptlrpc_request *req,
+                             struct ptlrpc_bulk_desc *desc,
+                             struct niobuf_local *local_nb, int npages,
+                             obd_count client_cksum, obd_count server_cksum,
+                             int mmap)
+{
+       struct obd_export *exp = req->rq_export;
+       struct ost_body *body;
+       char *router;
+       char *via;
+
+       body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
+       LASSERT (body != NULL);
+
+       if (req->rq_peer.nid == desc->bd_sender) {
+               via = router = "";
+       } else {
+               via = " via ";
+               router = libcfs_nid2str(desc->bd_sender);
+       }
+
+       if (mmap) {
+               CDEBUG_LIMIT(D_INFO, "client csum %x, server csum %x\n",
+                            client_cksum, server_cksum);
+               return;
+       }
+
+       LCONSOLE_ERROR_MSG(0x168, "BAD WRITE CHECKSUM: %s from %s%s%s inode "
+                          DFID" object "LPU64"/"LPU64" extent ["LPU64"-"LPU64
+                          "]: client csum %x, server csum %x\n",
+                          exp->exp_obd->obd_name, libcfs_id2str(req->rq_peer),
+                          via, router,
+                          body->oa.o_valid & OBD_MD_FLFID ?
+                          body->oa.o_parent_seq : (__u64)0,
+                          body->oa.o_valid & OBD_MD_FLFID ?
+                          body->oa.o_parent_oid : 0,
+                          body->oa.o_valid & OBD_MD_FLFID ?
+                          body->oa.o_parent_ver : 0,
+                          body->oa.o_id,
+                          body->oa.o_valid & OBD_MD_FLGROUP ?
+                          body->oa.o_seq : (__u64)0,
+                          local_nb[0].lnb_file_offset,
+                          local_nb[npages-1].lnb_file_offset +
+                          local_nb[npages-1].len - 1,
+                          client_cksum, server_cksum);
+}
+
 static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
 {
         struct ptlrpc_bulk_desc *desc = NULL;
@@ -1015,17 +1107,16 @@ static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
         if (rc != 0)
                 GOTO(out_lock, rc);
 
-        desc = ptlrpc_prep_bulk_exp(req, npages,
-                                     BULK_GET_SINK, OST_BULK_PORTAL);
-        if (desc == NULL)
-                GOTO(skip_transfer, rc = -ENOMEM);
+       desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
+                                   BULK_GET_SINK, OST_BULK_PORTAL);
+       if (desc == NULL)
+               GOTO(skip_transfer, rc = -ENOMEM);
 
-        /* NB Having prepped, we must commit... */
-
-        for (i = 0; i < npages; i++)
-                ptlrpc_prep_bulk_page(desc, local_nb[i].page,
-                                      local_nb[i].offset & ~CFS_PAGE_MASK,
-                                      local_nb[i].len);
+       /* NB Having prepped, we must commit... */
+       for (i = 0; i < npages; i++)
+               ptlrpc_prep_bulk_page_nopin(desc, local_nb[i].page,
+                                           local_nb[i].lnb_page_offset,
+                                           local_nb[i].len);
 
         rc = sptlrpc_svc_prep_bulk(req, desc);
         if (rc != 0)
@@ -1044,10 +1135,10 @@ skip_transfer:
                 repbody->oa.o_cksum = server_cksum;
                 cksum_counter++;
                 if (unlikely(client_cksum != server_cksum)) {
-                        CDEBUG_LIMIT(mmap ? D_INFO : D_ERROR,
-                                     "client csum %x, server csum %x\n",
-                                     client_cksum, server_cksum);
+                       ost_warn_on_cksum(req, desc, local_nb, npages,
+                                         client_cksum, server_cksum, mmap);
                         cksum_counter = 0;
+
                 } else if ((cksum_counter & (-cksum_counter)) == cksum_counter){
                         CDEBUG(D_INFO, "Checksum %u from %s OK: %x\n",
                                cksum_counter, libcfs_id2str(req->rq_peer),
@@ -1077,49 +1168,6 @@ skip_transfer:
          */
         repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
 
-        if (unlikely(client_cksum != server_cksum && rc == 0 && !mmap)) {
-                int  new_cksum = ost_checksum_bulk(desc, OST_WRITE, cksum_type);
-                char *msg;
-                char *via;
-                char *router;
-
-                if (new_cksum == server_cksum)
-                        msg = "changed in transit before arrival at OST";
-                else if (new_cksum == client_cksum)
-                        msg = "initial checksum before message complete";
-                else
-                        msg = "changed in transit AND after initial checksum";
-
-                if (req->rq_peer.nid == desc->bd_sender) {
-                        via = router = "";
-                } else {
-                        via = " via ";
-                        router = libcfs_nid2str(desc->bd_sender);
-                }
-
-                LCONSOLE_ERROR_MSG(0x168, "%s: BAD WRITE CHECKSUM: %s from "
-                                   "%s%s%s inode "DFID" object "
-                                   LPU64"/"LPU64" extent ["LPU64"-"LPU64"]\n",
-                                   exp->exp_obd->obd_name, msg,
-                                   libcfs_id2str(req->rq_peer),
-                                   via, router,
-                                   body->oa.o_valid & OBD_MD_FLFID ?
-                                                body->oa.o_parent_seq : (__u64)0,
-                                   body->oa.o_valid & OBD_MD_FLFID ?
-                                                body->oa.o_parent_oid : 0,
-                                   body->oa.o_valid & OBD_MD_FLFID ?
-                                                body->oa.o_parent_ver : 0,
-                                   body->oa.o_id,
-                                   body->oa.o_valid & OBD_MD_FLGROUP ?
-                                                body->oa.o_seq : (__u64)0,
-                                   local_nb[0].offset,
-                                   local_nb[npages-1].offset +
-                                   local_nb[npages-1].len - 1 );
-                CERROR("client csum %x, original server csum %x, "
-                       "server csum now %x\n",
-                       client_cksum, server_cksum, new_cksum);
-        }
-
         if (rc == 0) {
                 int nob = 0;
 
@@ -1148,7 +1196,7 @@ out_tls:
         ost_tls_put(req);
 out_bulk:
         if (desc)
-                ptlrpc_free_bulk(desc);
+               ptlrpc_free_bulk_nopin(desc);
 out:
         if (rc == 0) {
                 oti_to_request(oti, req);
@@ -1291,15 +1339,31 @@ static int ost_get_info(struct obd_export *exp, struct ptlrpc_request *req)
         if (reply == NULL)
                 RETURN(-ENOMEM);
 
+       if (KEY_IS(KEY_LAST_FID)) {
+               void *val;
+               int vallen;
+
+               req_capsule_extend(pill, &RQF_OST_GET_INFO_LAST_FID);
+               val = req_capsule_client_get(pill, &RMF_SETINFO_VAL);
+               vallen = req_capsule_get_size(pill, &RMF_SETINFO_VAL,
+                                             RCL_CLIENT);
+               if (val != NULL && vallen > 0 && replylen >= vallen) {
+                       memcpy(reply, val, vallen);
+               } else {
+                       CERROR("%s: invalid req val %p vallen %d replylen %d\n",
+                              exp->exp_obd->obd_name, val, vallen, replylen);
+                       GOTO(out, rc = -EINVAL);
+               }
+       }
+
         /* call again to fill in the reply buffer */
         rc = obd_get_info(req->rq_svc_thread->t_env, exp, keylen, key,
                           &replylen, reply, NULL);
-
+out:
         lustre_msg_set_status(req->rq_repmsg, 0);
         RETURN(rc);
 }
 
-#ifdef HAVE_QUOTA_SUPPORT
 static int ost_handle_quotactl(struct ptlrpc_request *req)
 {
         struct obd_quotactl *oqctl, *repoqc;
@@ -1336,35 +1400,11 @@ static int ost_handle_quotacheck(struct ptlrpc_request *req)
         if (rc)
                 RETURN(-ENOMEM);
 
-        req->rq_status = obd_quotacheck(req->rq_export, oqctl);
-        RETURN(0);
+       /* deprecated, not used any more */
+       req->rq_status = -EOPNOTSUPP;
+       RETURN(-EOPNOTSUPP);
 }
 
-static int ost_handle_quota_adjust_qunit(struct ptlrpc_request *req)
-{
-        struct quota_adjust_qunit *oqaq, *repoqa;
-        struct lustre_quota_ctxt *qctxt;
-        int rc;
-        ENTRY;
-
-        qctxt = &req->rq_export->exp_obd->u.obt.obt_qctxt;
-        oqaq = req_capsule_client_get(&req->rq_pill, &RMF_QUOTA_ADJUST_QUNIT);
-        if (oqaq == NULL)
-                GOTO(out, rc = -EPROTO);
-
-        rc = req_capsule_server_pack(&req->rq_pill);
-        if (rc)
-                GOTO(out, rc);
-
-        repoqa = req_capsule_server_get(&req->rq_pill, &RMF_QUOTA_ADJUST_QUNIT);
-        req->rq_status = obd_quota_adjust_qunit(req->rq_export, oqaq, qctxt, NULL);
-        *repoqa = *oqaq;
-
- out:
-        RETURN(rc);
-}
-#endif
-
 static int ost_llog_handle_connect(struct obd_export *exp,
                                    struct ptlrpc_request *req)
 {
@@ -1377,14 +1417,14 @@ static int ost_llog_handle_connect(struct obd_export *exp,
         RETURN(rc);
 }
 
-#define ost_init_sec_none(reply, exp)                                   \
-do {                                                                    \
-        reply->ocd_connect_flags &= ~(OBD_CONNECT_RMT_CLIENT |          \
-                                      OBD_CONNECT_RMT_CLIENT_FORCE |    \
-                                      OBD_CONNECT_OSS_CAPA);            \
-        cfs_spin_lock(&exp->exp_lock);                                  \
-        exp->exp_connect_flags = reply->ocd_connect_flags;              \
-        cfs_spin_unlock(&exp->exp_lock);                                \
+#define ost_init_sec_none(reply, exp)                                  \
+do {                                                                   \
+       reply->ocd_connect_flags &= ~(OBD_CONNECT_RMT_CLIENT |          \
+                                     OBD_CONNECT_RMT_CLIENT_FORCE |    \
+                                     OBD_CONNECT_OSS_CAPA);            \
+       spin_lock(&exp->exp_lock);                                      \
+       *exp_connect_flags_ptr(exp) = reply->ocd_connect_flags;         \
+       spin_unlock(&exp->exp_lock);                                    \
 } while (0)
 
 static int ost_init_sec_level(struct ptlrpc_request *req)
@@ -1481,9 +1521,9 @@ static int ost_init_sec_level(struct ptlrpc_request *req)
                         if (!filter->fo_fl_oss_capa)
                                 reply->ocd_connect_flags &= ~OBD_CONNECT_OSS_CAPA;
 
-                        cfs_spin_lock(&exp->exp_lock);
-                        exp->exp_connect_flags = reply->ocd_connect_flags;
-                        cfs_spin_unlock(&exp->exp_lock);
+                       spin_lock(&exp->exp_lock);
+                       *exp_connect_flags_ptr(exp) = reply->ocd_connect_flags;
+                       spin_unlock(&exp->exp_lock);
                 }
                 break;
         default:
@@ -1516,14 +1556,14 @@ static int ost_connect_check_sptlrpc(struct ptlrpc_request *req)
         }
 
         if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
-                cfs_read_lock(&filter->fo_sptlrpc_lock);
-                sptlrpc_target_choose_flavor(&filter->fo_sptlrpc_rset,
-                                             req->rq_sp_from,
-                                             req->rq_peer.nid,
-                                             &flvr);
-                cfs_read_unlock(&filter->fo_sptlrpc_lock);
+               read_lock(&filter->fo_sptlrpc_lock);
+               sptlrpc_target_choose_flavor(&filter->fo_sptlrpc_rset,
+                                            req->rq_sp_from,
+                                            req->rq_peer.nid,
+                                            &flvr);
+               read_unlock(&filter->fo_sptlrpc_lock);
 
-                cfs_spin_lock(&exp->exp_lock);
+               spin_lock(&exp->exp_lock);
 
                 exp->exp_sp_peer = req->rq_sp_from;
                 exp->exp_flvr = flvr;
@@ -1537,7 +1577,7 @@ static int ost_connect_check_sptlrpc(struct ptlrpc_request *req)
                         rc = -EACCES;
                 }
 
-                cfs_spin_unlock(&exp->exp_lock);
+               spin_unlock(&exp->exp_lock);
         } else {
                 if (exp->exp_sp_peer != req->rq_sp_from) {
                         CERROR("RPC source %s doesn't match %s\n",
@@ -1587,10 +1627,11 @@ int ost_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
                        OBD_FREE_PTR(oinfo);
                        GOTO(out_env, rc = -ENOMEM);
                }
-               oa->o_id = lock->l_resource->lr_name.name[0];
-               oa->o_seq = lock->l_resource->lr_name.name[1];
+
+               ostid_res_name_to_id(&oa->o_oi, &lock->l_resource->lr_name);
                oa->o_valid = OBD_MD_FLID|OBD_MD_FLGROUP;
                oinfo->oi_oa = oa;
+               oinfo->oi_capa = BYPASS_CAPA;
 
                rc = obd_sync(&env, lock->l_export, oinfo,
                              lock->l_policy_data.l_extent.start,
@@ -1654,6 +1695,15 @@ int ost_msg_check_version(struct lustre_msg *msg)
                                lustre_msg_get_version(msg),
                                LUSTRE_OBD_VERSION);
                 break;
+       case SEQ_QUERY:
+               /* Note: client always use MDS_VERSION for FID request */
+               rc = lustre_msg_check_version(msg, LUSTRE_MDS_VERSION);
+               if (rc)
+                       CERROR("bad opc %u version %08x, expecting %08x\n",
+                              lustre_msg_get_opc(msg),
+                              lustre_msg_get_version(msg),
+                              LUSTRE_MDS_VERSION);
+               break;
         case OST_CREATE:
         case OST_DESTROY:
         case OST_GETATTR:
@@ -1665,11 +1715,8 @@ int ost_msg_check_version(struct lustre_msg *msg)
         case OST_SYNC:
         case OST_SET_INFO:
         case OST_GET_INFO:
-#ifdef HAVE_QUOTA_SUPPORT
         case OST_QUOTACHECK:
         case OST_QUOTACTL:
-        case OST_QUOTA_ADJUST_QUNIT:
-#endif
                 rc = lustre_msg_check_version(msg, LUSTRE_OST_VERSION);
                 if (rc)
                         CERROR("bad opc %u version %08x, expecting %08x\n",
@@ -1698,6 +1745,10 @@ int ost_msg_check_version(struct lustre_msg *msg)
                                lustre_msg_get_version(msg),
                                LUSTRE_LOG_VERSION);
                 break;
+       case OST_QUOTA_ADJUST_QUNIT:
+               rc = -ENOTSUPP;
+               CERROR("Quota adjust is deprecated as of 2.4.0\n");
+               break;
         default:
                 CERROR("Unexpected opcode %d\n", lustre_msg_get_opc(msg));
                 rc = -ENOTSUPP;
@@ -1784,7 +1835,7 @@ static void ost_prolong_locks(struct ost_prolong_data *data)
         }
 
 
-        cfs_spin_lock_bh(&exp->exp_bl_list_lock);
+       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);
@@ -1798,9 +1849,9 @@ static void ost_prolong_locks(struct ost_prolong_data *data)
 
                 ost_prolong_lock_one(data, lock);
         }
-        cfs_spin_unlock_bh(&exp->exp_bl_list_lock);
+       spin_unlock_bh(&exp->exp_bl_list_lock);
 
-        EXIT;
+       EXIT;
 }
 
 /**
@@ -1829,10 +1880,9 @@ static int ost_rw_hpreq_lock_match(struct ptlrpc_request *req,
         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);
+       LASSERT(lock->l_resource != NULL);
+       if (!ostid_res_name_eq(&ioo->ioo_oid, &lock->l_resource->lr_name))
+               RETURN(0);
 
         mode = LCK_PW;
         if (opc == OST_READ)
@@ -1880,7 +1930,7 @@ static int ost_rw_hpreq_check(struct ptlrpc_request *req)
         LASSERT(nb != NULL);
         LASSERT(!(nb->flags & OBD_BRW_SRVLOCK));
 
-        osc_build_res_name(ioo->ioo_id, ioo->ioo_seq, &opd.opd_resid);
+       ostid_build_res_name(&ioo->ioo_oid, &opd.opd_resid);
 
         opd.opd_req = req;
         mode = LCK_PW;
@@ -1905,7 +1955,7 @@ static int ost_rw_hpreq_check(struct ptlrpc_request *req)
         CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
                obd->obd_name, opd.opd_locks, req);
 
-        RETURN(opd.opd_locks);
+        RETURN(opd.opd_locks > 0);
 }
 
 static void ost_rw_hpreq_fini(struct ptlrpc_request *req)
@@ -1964,7 +2014,7 @@ static int ost_punch_hpreq_check(struct ptlrpc_request *req)
                 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);
+       ostid_build_res_name(&oa->o_oi, &opd.opd_resid);
 
         CDEBUG(D_DLMTRACE,
                "%s: refresh locks: "LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
@@ -1998,7 +2048,7 @@ struct ptlrpc_hpreq_ops ost_hpreq_punch = {
 };
 
 /** Assign high priority operations to the request if needed. */
-static int ost_hpreq_handler(struct ptlrpc_request *req)
+static int ost_io_hpreq_handler(struct ptlrpc_request *req)
 {
         ENTRY;
         if (req->rq_export) {
@@ -2160,7 +2210,7 @@ int ost_handle(struct ptlrpc_request *req)
                 RETURN(rc);
 
        if (req && req->rq_reqmsg && req->rq_export &&
-           (req->rq_export->exp_connect_flags & OBD_CONNECT_JOBSTATS))
+           (exp_connect_flags(req->rq_export) & OBD_CONNECT_JOBSTATS))
                oti->oti_jobid = lustre_msg_get_jobid(req->rq_reqmsg);
 
         switch (lustre_msg_get_opc(req->rq_reqmsg)) {
@@ -2233,7 +2283,7 @@ int ost_handle(struct ptlrpc_request *req)
                         RETURN(0);
                 if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOSPC))
                         GOTO(out, rc = -ENOSPC);
-                if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
+                if (OBD_FAIL_TIMEOUT(OBD_FAIL_OST_EROFS, 1))
                         GOTO(out, rc = -EROFS);
                 rc = ost_brw_write(req, oti);
                 LASSERT(current->journal_info == NULL);
@@ -2289,7 +2339,10 @@ int ost_handle(struct ptlrpc_request *req)
                 req_capsule_set(&req->rq_pill, &RQF_OST_GET_INFO_GENERIC);
                 rc = ost_get_info(req->rq_export, req);
                 break;
-#ifdef HAVE_QUOTA_SUPPORT
+       case SEQ_QUERY:
+               CDEBUG(D_INODE, "seq\n");
+               rc = seq_handle(req);
+               break;
         case OST_QUOTACHECK:
                 CDEBUG(D_INODE, "quotacheck\n");
                 req_capsule_set(&req->rq_pill, &RQF_OST_QUOTACHECK);
@@ -2304,12 +2357,6 @@ int ost_handle(struct ptlrpc_request *req)
                         RETURN(0);
                 rc = ost_handle_quotactl(req);
                 break;
-        case OST_QUOTA_ADJUST_QUNIT:
-                CDEBUG(D_INODE, "quota_adjust_qunit\n");
-                req_capsule_set(&req->rq_pill, &RQF_OST_QUOTA_ADJUST_QUNIT);
-                rc = ost_handle_quota_adjust_qunit(req);
-                break;
-#endif
         case OBD_PING:
                 DEBUG_REQ(D_INODE, req, "ping");
                 req_capsule_set(&req->rq_pill, &RQF_OBD_PING);
@@ -2338,30 +2385,30 @@ int ost_handle(struct ptlrpc_request *req)
                 if (rc)
                         RETURN(rc);
                 RETURN(ptlrpc_reply(req));
-        case LDLM_ENQUEUE:
-                CDEBUG(D_INODE, "enqueue\n");
-                req_capsule_set(&req->rq_pill, &RQF_LDLM_ENQUEUE);
-                if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE))
-                        RETURN(0);
-                rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
-                                         ost_blocking_ast,
-                                         ldlm_server_glimpse_ast);
-                fail = OBD_FAIL_OST_LDLM_REPLY_NET;
-                break;
-        case LDLM_CONVERT:
-                CDEBUG(D_INODE, "convert\n");
-                req_capsule_set(&req->rq_pill, &RQF_LDLM_CONVERT);
-                if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CONVERT))
-                        RETURN(0);
-                rc = ldlm_handle_convert(req);
-                break;
-        case LDLM_CANCEL:
-                CDEBUG(D_INODE, "cancel\n");
-                req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
-                if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL))
-                        RETURN(0);
-                rc = ldlm_handle_cancel(req);
-                break;
+       case LDLM_ENQUEUE:
+               CDEBUG(D_INODE, "enqueue\n");
+               req_capsule_set(&req->rq_pill, &RQF_LDLM_ENQUEUE);
+               if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_ENQUEUE_NET))
+                       RETURN(0);
+               rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
+                                        ost_blocking_ast,
+                                        ldlm_server_glimpse_ast);
+               fail = OBD_FAIL_OST_LDLM_REPLY_NET;
+               break;
+       case LDLM_CONVERT:
+               CDEBUG(D_INODE, "convert\n");
+               req_capsule_set(&req->rq_pill, &RQF_LDLM_CONVERT);
+               if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CONVERT_NET))
+                       RETURN(0);
+               rc = ldlm_handle_convert(req);
+               break;
+       case LDLM_CANCEL:
+               CDEBUG(D_INODE, "cancel\n");
+               req_capsule_set(&req->rq_pill, &RQF_LDLM_CANCEL);
+               if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_CANCEL_NET))
+                       RETURN(0);
+               rc = ldlm_handle_cancel(req);
+               break;
         case LDLM_BL_CALLBACK:
         case LDLM_CP_CALLBACK:
                 CDEBUG(D_INODE, "callback\n");
@@ -2390,10 +2437,11 @@ out:
         return 0;
 }
 EXPORT_SYMBOL(ost_handle);
+
 /*
- * free per-thread pool created by ost_thread_init().
+ * free per-thread pool created by ost_io_thread_init().
  */
-static void ost_thread_done(struct ptlrpc_thread *thread)
+static void ost_io_thread_done(struct ptlrpc_thread *thread)
 {
         struct ost_thread_local_cache *tls; /* TLS stands for Thread-Local
                                              * Storage */
@@ -2404,7 +2452,7 @@ static void ost_thread_done(struct ptlrpc_thread *thread)
 
         /*
          * be prepared to handle partially-initialized pools (because this is
-         * called from ost_thread_init() for cleanup.
+         * called from ost_io_thread_init() for cleanup.
          */
         tls = thread->t_data;
         if (tls != NULL) {
@@ -2417,7 +2465,7 @@ static void ost_thread_done(struct ptlrpc_thread *thread)
 /*
  * initialize per-thread page pool (bug 5137).
  */
-static int ost_thread_init(struct ptlrpc_thread *thread)
+static int ost_io_thread_init(struct ptlrpc_thread *thread)
 {
         struct ost_thread_local_cache *tls;
 
@@ -2454,7 +2502,7 @@ 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_mutex_init(&ost->ost_health_mutex);
+       mutex_init(&ost->ost_health_mutex);
 
        svc_conf = (typeof(svc_conf)) {
                .psc_name               = LUSTRE_OSS_NAME,
@@ -2522,7 +2570,6 @@ static int ost_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
                .psc_ops                = {
                        .so_req_handler         = ost_handle,
                        .so_req_printer         = target_print_req,
-                       .so_hpreq_handler       = NULL,
                },
        };
        ost->ost_create_service = ptlrpc_register_service(&svc_conf,
@@ -2564,9 +2611,9 @@ static int ost_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
                .psc_watchdog_factor    = OSS_SERVICE_WATCHDOG_FACTOR,
                .psc_buf                = {
                        .bc_nbufs               = OST_NBUFS,
-                       .bc_buf_size            = OST_BUFSIZE,
-                       .bc_req_max_size        = OST_MAXREQSIZE,
-                       .bc_rep_max_size        = OST_MAXREPSIZE,
+                       .bc_buf_size            = OST_IO_BUFSIZE,
+                       .bc_req_max_size        = OST_IO_MAXREQSIZE,
+                       .bc_rep_max_size        = OST_IO_MAXREPSIZE,
                        .bc_req_portal          = OST_IO_PORTAL,
                        .bc_rep_portal          = OSC_REPLY_PORTAL,
                },
@@ -2586,12 +2633,11 @@ static int ost_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
                                                  oss_io_cpts : NULL,
                },
                .psc_ops                = {
-                       .so_thr_init            = ost_thread_init,
-                       .so_thr_done            = ost_thread_done,
+                       .so_thr_init            = ost_io_thread_init,
+                       .so_thr_done            = ost_io_thread_done,
                        .so_req_handler         = ost_handle,
-                       .so_hpreq_handler       = ost_hpreq_handler,
+                       .so_hpreq_handler       = ost_io_hpreq_handler,
                        .so_req_printer         = target_print_req,
-                       .so_hpreq_handler       = NULL,
                },
        };
        ost->ost_io_service = ptlrpc_register_service(&svc_conf,
@@ -2603,10 +2649,53 @@ static int ost_setup(struct obd_device *obd, struct lustre_cfg* lcfg)
                GOTO(out_create, rc);
         }
 
+       memset(&svc_conf, 0, sizeof(svc_conf));
+       svc_conf = (typeof(svc_conf)) {
+               .psc_name               = "ost_seq",
+               .psc_watchdog_factor    = OSS_SERVICE_WATCHDOG_FACTOR,
+               .psc_buf                = {
+                       .bc_nbufs               = OST_NBUFS,
+                       .bc_buf_size            = OST_BUFSIZE,
+                       .bc_req_max_size        = OST_MAXREQSIZE,
+                       .bc_rep_max_size        = OST_MAXREPSIZE,
+                       .bc_req_portal          = SEQ_DATA_PORTAL,
+                       .bc_rep_portal          = OSC_REPLY_PORTAL,
+               },
+               .psc_thr                = {
+                       .tc_thr_name            = "ll_ost_seq",
+                       .tc_thr_factor          = OSS_CR_THR_FACTOR,
+                       .tc_nthrs_init          = OSS_CR_NTHRS_INIT,
+                       .tc_nthrs_base          = OSS_CR_NTHRS_BASE,
+                       .tc_nthrs_max           = OSS_CR_NTHRS_MAX,
+                       .tc_nthrs_user          = oss_num_create_threads,
+                       .tc_cpu_affinity        = 1,
+                       .tc_ctx_tags            = LCT_DT_THREAD,
+               },
+
+               .psc_cpt                = {
+                       .cc_pattern          = oss_cpts,
+               },
+               .psc_ops                = {
+                       .so_req_handler         = ost_handle,
+                       .so_req_printer         = target_print_req,
+                       .so_hpreq_handler       = NULL,
+               },
+       };
+       ost->ost_seq_service = ptlrpc_register_service(&svc_conf,
+                                                     obd->obd_proc_entry);
+       if (IS_ERR(ost->ost_seq_service)) {
+               rc = PTR_ERR(ost->ost_seq_service);
+               CERROR("failed to start OST seq service: %d\n", rc);
+               ost->ost_seq_service = NULL;
+               GOTO(out_io, rc);
+       }
+
         ping_evictor_start();
 
         RETURN(0);
-
+out_io:
+       ptlrpc_unregister_service(ost->ost_io_service);
+       ost->ost_io_service = NULL;
 out_create:
         ptlrpc_unregister_service(ost->ost_create_service);
         ost->ost_create_service = NULL;
@@ -2620,24 +2709,26 @@ out_lprocfs:
 
 static int ost_cleanup(struct obd_device *obd)
 {
-        struct ost_obd *ost = &obd->u.ost;
-        int err = 0;
-        ENTRY;
-
-        ping_evictor_stop();
+       struct ost_obd *ost = &obd->u.ost;
+       int err = 0;
+       ENTRY;
 
-        /* there is no recovery for OST OBD, all recovery is controlled by
-         * obdfilter OBD */
-        LASSERT(obd->obd_recovering == 0);
-        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;
+       ping_evictor_stop();
+
+       /* there is no recovery for OST OBD, all recovery is controlled by
+        * obdfilter OBD */
+       LASSERT(obd->obd_recovering == 0);
+       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);
+       ptlrpc_unregister_service(ost->ost_seq_service);
+       ost->ost_service = NULL;
+       ost->ost_create_service = NULL;
        ost->ost_io_service = NULL;
+       ost->ost_seq_service = NULL;
 
-       cfs_mutex_unlock(&ost->ost_health_mutex);
+       mutex_unlock(&ost->ost_health_mutex);
 
        lprocfs_obd_cleanup(obd);
 
@@ -2654,11 +2745,11 @@ 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_mutex_lock(&ost->ost_health_mutex);
+       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_mutex_unlock(&ost->ost_health_mutex);
+       mutex_unlock(&ost->ost_health_mutex);
 
         /*
          * health_check to return 0 on healthy
@@ -2690,6 +2781,8 @@ static int __init ost_init(void)
         int rc;
         ENTRY;
 
+       ost_page_to_corrupt = cfs_alloc_page(CFS_ALLOC_STD);
+
         lprocfs_ost_init_vars(&lvars);
         rc = class_register_type(&ost_obd_ops, NULL, lvars.module_vars,
                                  LUSTRE_OSS_NAME, NULL);
@@ -2706,6 +2799,9 @@ static int __init ost_init(void)
 
 static void /*__exit*/ ost_exit(void)
 {
+       if (ost_page_to_corrupt)
+               page_cache_release(ost_page_to_corrupt);
+
         class_unregister_type(LUSTRE_OSS_NAME);
 }