Whamcloud - gitweb
LU-2139 osc: Track and limit "unstable" pages
[fs/lustre-release.git] / lustre / osc / osc_request.c
index 55439f5..c5bca5e 100644 (file)
@@ -27,7 +27,7 @@
  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2011, 2012, Whamcloud, Inc.
+ * Copyright (c) 2011, 2013, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -58,6 +58,7 @@
 #include <lustre_log.h>
 #include <lustre_debug.h>
 #include <lustre_param.h>
+#include <lustre_fid.h>
 #include "osc_internal.h"
 #include "osc_cl_internal.h"
 
@@ -68,97 +69,95 @@ int osc_cleanup(struct obd_device *obd);
 
 /* Pack OSC object metadata for disk storage (LE byte order). */
 static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
-                      struct lov_stripe_md *lsm)
+                     struct lov_stripe_md *lsm)
 {
-        int lmm_size;
-        ENTRY;
+       int lmm_size;
+       ENTRY;
 
-        lmm_size = sizeof(**lmmp);
-        if (!lmmp)
-                RETURN(lmm_size);
+       lmm_size = sizeof(**lmmp);
+       if (lmmp == NULL)
+               RETURN(lmm_size);
 
-        if (*lmmp && !lsm) {
-                OBD_FREE(*lmmp, lmm_size);
-                *lmmp = NULL;
-                RETURN(0);
-        }
+       if (*lmmp != NULL && lsm == NULL) {
+               OBD_FREE(*lmmp, lmm_size);
+               *lmmp = NULL;
+               RETURN(0);
+       } else if (unlikely(lsm != NULL && ostid_id(&lsm->lsm_oi) == 0)) {
+               RETURN(-EBADF);
+       }
 
-        if (!*lmmp) {
-                OBD_ALLOC(*lmmp, lmm_size);
-                if (!*lmmp)
-                        RETURN(-ENOMEM);
-        }
+       if (*lmmp == NULL) {
+               OBD_ALLOC(*lmmp, lmm_size);
+               if (*lmmp == NULL)
+                       RETURN(-ENOMEM);
+       }
 
-        if (lsm) {
-                LASSERT(lsm->lsm_object_id);
-                LASSERT_SEQ_IS_MDT(lsm->lsm_object_seq);
-                (*lmmp)->lmm_object_id = cpu_to_le64(lsm->lsm_object_id);
-                (*lmmp)->lmm_object_seq = cpu_to_le64(lsm->lsm_object_seq);
-        }
+       if (lsm)
+               ostid_cpu_to_le(&lsm->lsm_oi, &(*lmmp)->lmm_oi);
 
-        RETURN(lmm_size);
+       RETURN(lmm_size);
 }
 
 /* Unpack OSC object metadata from disk storage (LE byte order). */
 static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
-                        struct lov_mds_md *lmm, int lmm_bytes)
+                       struct lov_mds_md *lmm, int lmm_bytes)
 {
-        int lsm_size;
-        struct obd_import *imp = class_exp2cliimp(exp);
-        ENTRY;
+       int lsm_size;
+       struct obd_import *imp = class_exp2cliimp(exp);
+       ENTRY;
 
-        if (lmm != NULL) {
-                if (lmm_bytes < sizeof (*lmm)) {
-                        CERROR("lov_mds_md too small: %d, need %d\n",
-                               lmm_bytes, (int)sizeof(*lmm));
-                        RETURN(-EINVAL);
-                }
-                /* XXX LOV_MAGIC etc check? */
+       if (lmm != NULL) {
+               if (lmm_bytes < sizeof(*lmm)) {
+                       CERROR("%s: lov_mds_md too small: %d, need %d\n",
+                              exp->exp_obd->obd_name, lmm_bytes,
+                              (int)sizeof(*lmm));
+                       RETURN(-EINVAL);
+               }
+               /* XXX LOV_MAGIC etc check? */
 
-                if (lmm->lmm_object_id == 0) {
-                        CERROR("lov_mds_md: zero lmm_object_id\n");
-                        RETURN(-EINVAL);
-                }
-        }
+               if (unlikely(ostid_id(&lmm->lmm_oi) == 0)) {
+                       CERROR("%s: zero lmm_object_id: rc = %d\n",
+                              exp->exp_obd->obd_name, -EINVAL);
+                       RETURN(-EINVAL);
+               }
+       }
 
-        lsm_size = lov_stripe_md_size(1);
-        if (lsmp == NULL)
-                RETURN(lsm_size);
+       lsm_size = lov_stripe_md_size(1);
+       if (lsmp == NULL)
+               RETURN(lsm_size);
 
-        if (*lsmp != NULL && lmm == NULL) {
-                OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
-                OBD_FREE(*lsmp, lsm_size);
-                *lsmp = NULL;
-                RETURN(0);
-        }
+       if (*lsmp != NULL && lmm == NULL) {
+               OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
+               OBD_FREE(*lsmp, lsm_size);
+               *lsmp = NULL;
+               RETURN(0);
+       }
 
-        if (*lsmp == NULL) {
-                OBD_ALLOC(*lsmp, lsm_size);
-                if (*lsmp == NULL)
-                        RETURN(-ENOMEM);
-                OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
-                if ((*lsmp)->lsm_oinfo[0] == NULL) {
-                        OBD_FREE(*lsmp, lsm_size);
-                        RETURN(-ENOMEM);
-                }
-                loi_init((*lsmp)->lsm_oinfo[0]);
-        }
+       if (*lsmp == NULL) {
+               OBD_ALLOC(*lsmp, lsm_size);
+               if (unlikely(*lsmp == NULL))
+                       RETURN(-ENOMEM);
+               OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
+               if (unlikely((*lsmp)->lsm_oinfo[0] == NULL)) {
+                       OBD_FREE(*lsmp, lsm_size);
+                       RETURN(-ENOMEM);
+               }
+               loi_init((*lsmp)->lsm_oinfo[0]);
+       } else if (unlikely(ostid_id(&(*lsmp)->lsm_oi) == 0)) {
+               RETURN(-EBADF);
+       }
 
-        if (lmm != NULL) {
-                /* XXX zero *lsmp? */
-                (*lsmp)->lsm_object_id = le64_to_cpu (lmm->lmm_object_id);
-                (*lsmp)->lsm_object_seq = le64_to_cpu (lmm->lmm_object_seq);
-                LASSERT((*lsmp)->lsm_object_id);
-                LASSERT_SEQ_IS_MDT((*lsmp)->lsm_object_seq);
-        }
+       if (lmm != NULL)
+               /* XXX zero *lsmp? */
+               ostid_le_to_cpu(&lmm->lmm_oi, &(*lsmp)->lsm_oi);
 
-        if (imp != NULL &&
-            (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES))
-                (*lsmp)->lsm_maxbytes = imp->imp_connect_data.ocd_maxbytes;
-        else
-                (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
+       if (imp != NULL &&
+           (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES))
+               (*lsmp)->lsm_maxbytes = imp->imp_connect_data.ocd_maxbytes;
+       else
+               (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
 
-        RETURN(lsm_size);
+       RETURN(lsm_size);
 }
 
 static inline void osc_pack_capa(struct ptlrpc_request *req,
@@ -180,13 +179,14 @@ static inline void osc_pack_capa(struct ptlrpc_request *req,
 static inline void osc_pack_req_body(struct ptlrpc_request *req,
                                      struct obd_info *oinfo)
 {
-        struct ost_body *body;
+       struct ost_body *body;
 
-        body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
-        LASSERT(body);
+       body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
+       LASSERT(body);
 
-        lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
-        osc_pack_capa(req, body, oinfo->oi_capa);
+       lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
+                            oinfo->oi_oa);
+       osc_pack_capa(req, body, oinfo->oi_capa);
 }
 
 static inline void osc_set_capa_size(struct ptlrpc_request *req,
@@ -212,12 +212,13 @@ static int osc_getattr_interpret(const struct lu_env *env,
 
         body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
         if (body) {
-                CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
-                lustre_get_wire_obdo(aa->aa_oi->oi_oa, &body->oa);
+               CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
+               lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
+                                    aa->aa_oi->oi_oa, &body->oa);
 
-                /* This should really be sent by the OST */
-                aa->aa_oi->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
-                aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
+               /* This should really be sent by the OST */
+               aa->aa_oi->oi_oa->o_blksize = DT_MAX_BRW_SIZE;
+               aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
         } else {
                 CDEBUG(D_INFO, "can't unpack ost_body\n");
                 rc = -EPROTO;
@@ -291,12 +292,12 @@ static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
         if (body == NULL)
                 GOTO(out, rc = -EPROTO);
 
-        CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
-        lustre_get_wire_obdo(oinfo->oi_oa, &body->oa);
+       CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
+       lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oinfo->oi_oa,
+                            &body->oa);
 
-        /* This should really be sent by the OST */
-        oinfo->oi_oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
-        oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
+       oinfo->oi_oa->o_blksize = cli_brw_size(exp->exp_obd);
+       oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
 
         EXIT;
  out:
@@ -337,7 +338,8 @@ static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
         if (body == NULL)
                 GOTO(out, rc = -EPROTO);
 
-        lustre_get_wire_obdo(oinfo->oi_oa, &body->oa);
+       lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oinfo->oi_oa,
+                            &body->oa);
 
         EXIT;
 out:
@@ -359,7 +361,8 @@ static int osc_setattr_interpret(const struct lu_env *env,
         if (body == NULL)
                 GOTO(out, rc = -EPROTO);
 
-        lustre_get_wire_obdo(sa->sa_oa, &body->oa);
+       lustre_get_wire_obdo(&req->rq_import->imp_connect_data, sa->sa_oa,
+                            &body->oa);
 out:
         rc = sa->sa_upcall(sa->sa_cookie, rc);
         RETURN(rc);
@@ -455,7 +458,8 @@ int osc_real_create(struct obd_export *exp, struct obdo *oa,
 
         body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
         LASSERT(body);
-        lustre_set_wire_obdo(&body->oa, oa);
+
+       lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
 
         ptlrpc_request_set_replen(req);
 
@@ -475,19 +479,18 @@ int osc_real_create(struct obd_export *exp, struct obdo *oa,
         if (body == NULL)
                 GOTO(out_req, rc = -EPROTO);
 
-        lustre_get_wire_obdo(oa, &body->oa);
+       CDEBUG(D_INFO, "oa flags %x\n", oa->o_flags);
+       lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
 
-        /* This should really be sent by the OST */
-        oa->o_blksize = PTLRPC_MAX_BRW_SIZE;
-        oa->o_valid |= OBD_MD_FLBLKSZ;
+       oa->o_blksize = cli_brw_size(exp->exp_obd);
+       oa->o_valid |= OBD_MD_FLBLKSZ;
 
-        /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
-         * have valid lsm_oinfo data structs, so don't go touching that.
-         * This needs to be fixed in a big way.
-         */
-        lsm->lsm_object_id = oa->o_id;
-        lsm->lsm_object_seq = oa->o_seq;
-        *ea = lsm;
+       /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
+        * have valid lsm_oinfo data structs, so don't go touching that.
+        * This needs to be fixed in a big way.
+        */
+       lsm->lsm_oi = oa->o_oi;
+       *ea = lsm;
 
         if (oti != NULL) {
                 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
@@ -532,10 +535,11 @@ int osc_punch_base(struct obd_export *exp, struct obd_info *oinfo,
         req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
         ptlrpc_at_set_req_timeout(req);
 
-        body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
-        LASSERT(body);
-        lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
-        osc_pack_capa(req, body, oinfo->oi_capa);
+       body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
+       LASSERT(body);
+       lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
+                            oinfo->oi_oa);
+       osc_pack_capa(req, body, oinfo->oi_capa);
 
         ptlrpc_request_set_replen(req);
 
@@ -608,11 +612,12 @@ int osc_sync_base(struct obd_export *exp, struct obd_info *oinfo,
                 RETURN(rc);
         }
 
-        /* overload the size and blocks fields in the oa with start/end */
-        body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
-        LASSERT(body);
-        lustre_set_wire_obdo(&body->oa, oinfo->oi_oa);
-        osc_pack_capa(req, body, oinfo->oi_capa);
+       /* overload the size and blocks fields in the oa with start/end */
+       body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
+       LASSERT(body);
+       lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
+                            oinfo->oi_oa);
+       osc_pack_capa(req, body, oinfo->oi_capa);
 
         ptlrpc_request_set_replen(req);
         req->rq_interpret_reply = osc_sync_interpret;
@@ -653,8 +658,8 @@ static int osc_sync(const struct lu_env *env, struct obd_export *exp,
  * @objid. Found locks are added into @cancel list. Returns the amount of
  * locks added to @cancels list. */
 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
-                                   cfs_list_t *cancels,
-                                   ldlm_mode_t mode, int lock_flags)
+                                  cfs_list_t *cancels,
+                                  ldlm_mode_t mode, __u64 lock_flags)
 {
         struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
         struct ldlm_res_id res_id;
@@ -662,10 +667,19 @@ static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
         int count;
         ENTRY;
 
-        osc_build_res_name(oa->o_id, oa->o_seq, &res_id);
-        res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
-        if (res == NULL)
-                RETURN(0);
+       /* Return, i.e. cancel nothing, only if ELC is supported (flag in
+        * export) but disabled through procfs (flag in NS).
+        *
+        * This distinguishes from a case when ELC is not supported originally,
+        * when we still want to cancel locks in advance and just cancel them
+        * locally, without sending any RPC. */
+       if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
+               RETURN(0);
+
+       ostid_build_res_name(&oa->o_oi, &res_id);
+       res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
+       if (res == NULL)
+               RETURN(0);
 
         LDLM_RESOURCE_ADDREF(res);
         count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
@@ -676,32 +690,57 @@ static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
 }
 
 static int osc_destroy_interpret(const struct lu_env *env,
-                                 struct ptlrpc_request *req, void *data,
-                                 int rc)
+                                struct ptlrpc_request *req, void *data,
+                                int rc)
 {
-        struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
+       struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
 
-        cfs_atomic_dec(&cli->cl_destroy_in_flight);
-        cfs_waitq_signal(&cli->cl_destroy_waitq);
-        return 0;
+       cfs_atomic_dec(&cli->cl_destroy_in_flight);
+       wake_up(&cli->cl_destroy_waitq);
+       return 0;
 }
 
 static int osc_can_send_destroy(struct client_obd *cli)
 {
-        if (cfs_atomic_inc_return(&cli->cl_destroy_in_flight) <=
-            cli->cl_max_rpcs_in_flight) {
-                /* The destroy request can be sent */
-                return 1;
-        }
-        if (cfs_atomic_dec_return(&cli->cl_destroy_in_flight) <
-            cli->cl_max_rpcs_in_flight) {
-                /*
-                 * The counter has been modified between the two atomic
-                 * operations.
-                 */
-                cfs_waitq_signal(&cli->cl_destroy_waitq);
-        }
-        return 0;
+       if (cfs_atomic_inc_return(&cli->cl_destroy_in_flight) <=
+           cli->cl_max_rpcs_in_flight) {
+               /* The destroy request can be sent */
+               return 1;
+       }
+       if (cfs_atomic_dec_return(&cli->cl_destroy_in_flight) <
+           cli->cl_max_rpcs_in_flight) {
+               /*
+                * The counter has been modified between the two atomic
+                * operations.
+                */
+               wake_up(&cli->cl_destroy_waitq);
+       }
+       return 0;
+}
+
+int osc_create(const struct lu_env *env, struct obd_export *exp,
+              struct obdo *oa, struct lov_stripe_md **ea,
+              struct obd_trans_info *oti)
+{
+       int rc = 0;
+       ENTRY;
+
+       LASSERT(oa);
+       LASSERT(ea);
+       LASSERT(oa->o_valid & OBD_MD_FLGROUP);
+
+       if ((oa->o_valid & OBD_MD_FLFLAGS) &&
+           oa->o_flags == OBD_FL_RECREATE_OBJS) {
+               RETURN(osc_real_create(exp, oa, ea, oti));
+       }
+
+       if (!fid_seq_is_mdt(ostid_seq(&oa->o_oi)))
+               RETURN(osc_real_create(exp, oa, ea, oti));
+
+       /* we should not get here anymore */
+       LBUG();
+
+       RETURN(rc);
 }
 
 /* Destroy requests can be async always on the client, and we don't even really
@@ -751,11 +790,11 @@ static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
         req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
         ptlrpc_at_set_req_timeout(req);
 
-        if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
-                oa->o_lcookie = *oti->oti_logcookies;
-        body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
-        LASSERT(body);
-        lustre_set_wire_obdo(&body->oa, oa);
+       if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
+               oa->o_lcookie = *oti->oti_logcookies;
+       body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
+       LASSERT(body);
+       lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
 
         osc_pack_capa(req, body, (struct obd_capa *)capa);
         ptlrpc_request_set_replen(req);
@@ -794,28 +833,33 @@ static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
         oa->o_valid |= bits;
         client_obd_list_lock(&cli->cl_loi_list_lock);
         oa->o_dirty = cli->cl_dirty;
-        if (cli->cl_dirty - cli->cl_dirty_transit > cli->cl_dirty_max) {
-                CERROR("dirty %lu - %lu > dirty_max %lu\n",
-                       cli->cl_dirty, cli->cl_dirty_transit, cli->cl_dirty_max);
-                oa->o_undirty = 0;
-        } else if (cfs_atomic_read(&obd_dirty_pages) -
-                   cfs_atomic_read(&obd_dirty_transit_pages) >
-                   obd_max_dirty_pages + 1){
-                /* The cfs_atomic_read() allowing the cfs_atomic_inc() are
-                 * not covered by a lock thus they may safely race and trip
-                 * this CERROR() unless we add in a small fudge factor (+1). */
-                CERROR("dirty %d - %d > system dirty_max %d\n",
-                       cfs_atomic_read(&obd_dirty_pages),
-                       cfs_atomic_read(&obd_dirty_transit_pages),
-                       obd_max_dirty_pages);
-                oa->o_undirty = 0;
-        } else if (cli->cl_dirty_max - cli->cl_dirty > 0x7fffffff) {
-                CERROR("dirty %lu - dirty_max %lu too big???\n",
-                       cli->cl_dirty, cli->cl_dirty_max);
-                oa->o_undirty = 0;
-        } else {
-                long max_in_flight = (cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT)*
-                                (cli->cl_max_rpcs_in_flight + 1);
+       if (unlikely(cli->cl_dirty - cli->cl_dirty_transit >
+                    cli->cl_dirty_max)) {
+               CERROR("dirty %lu - %lu > dirty_max %lu\n",
+                      cli->cl_dirty, cli->cl_dirty_transit, cli->cl_dirty_max);
+               oa->o_undirty = 0;
+       } else if (unlikely(cfs_atomic_read(&obd_unstable_pages) +
+                           cfs_atomic_read(&obd_dirty_pages) -
+                           cfs_atomic_read(&obd_dirty_transit_pages) >
+                           (long)(obd_max_dirty_pages + 1))) {
+               /* The cfs_atomic_read() allowing the cfs_atomic_inc() are
+                * not covered by a lock thus they may safely race and trip
+                * this CERROR() unless we add in a small fudge factor (+1). */
+               CERROR("%s: dirty %d + %d - %d > system dirty_max %d\n",
+                      cli->cl_import->imp_obd->obd_name,
+                      cfs_atomic_read(&obd_unstable_pages),
+                      cfs_atomic_read(&obd_dirty_pages),
+                      cfs_atomic_read(&obd_dirty_transit_pages),
+                      obd_max_dirty_pages);
+               oa->o_undirty = 0;
+       } else if (unlikely(cli->cl_dirty_max - cli->cl_dirty > 0x7fffffff)) {
+               CERROR("dirty %lu - dirty_max %lu too big???\n",
+                      cli->cl_dirty, cli->cl_dirty_max);
+               oa->o_undirty = 0;
+       } else {
+               long max_in_flight = (cli->cl_max_pages_per_rpc <<
+                                     PAGE_CACHE_SHIFT) *
+                                    (cli->cl_max_rpcs_in_flight + 1);
                 oa->o_undirty = max(cli->cl_dirty_max, max_in_flight);
         }
        oa->o_grant = cli->cl_avail_grant + cli->cl_reserved_grant;
@@ -895,45 +939,45 @@ static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
  * needed, and avoids shrinking the grant piecemeal. */
 static int osc_shrink_grant(struct client_obd *cli)
 {
-        long target = (cli->cl_max_rpcs_in_flight + 1) *
-                      cli->cl_max_pages_per_rpc;
+       __u64 target_bytes = (cli->cl_max_rpcs_in_flight + 1) *
+                            (cli->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT);
 
-        client_obd_list_lock(&cli->cl_loi_list_lock);
-        if (cli->cl_avail_grant <= target)
-                target = cli->cl_max_pages_per_rpc;
-        client_obd_list_unlock(&cli->cl_loi_list_lock);
+       client_obd_list_lock(&cli->cl_loi_list_lock);
+       if (cli->cl_avail_grant <= target_bytes)
+               target_bytes = cli->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
+       client_obd_list_unlock(&cli->cl_loi_list_lock);
 
-        return osc_shrink_grant_to_target(cli, target);
+       return osc_shrink_grant_to_target(cli, target_bytes);
 }
 
-int osc_shrink_grant_to_target(struct client_obd *cli, long target)
+int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes)
 {
-        int    rc = 0;
-        struct ost_body     *body;
-        ENTRY;
-
-        client_obd_list_lock(&cli->cl_loi_list_lock);
-        /* Don't shrink if we are already above or below the desired limit
-         * We don't want to shrink below a single RPC, as that will negatively
-         * impact block allocation and long-term performance. */
-        if (target < cli->cl_max_pages_per_rpc)
-                target = cli->cl_max_pages_per_rpc;
+       int                     rc = 0;
+       struct ost_body        *body;
+       ENTRY;
 
-        if (target >= cli->cl_avail_grant) {
-                client_obd_list_unlock(&cli->cl_loi_list_lock);
-                RETURN(0);
-        }
-        client_obd_list_unlock(&cli->cl_loi_list_lock);
+       client_obd_list_lock(&cli->cl_loi_list_lock);
+       /* Don't shrink if we are already above or below the desired limit
+        * We don't want to shrink below a single RPC, as that will negatively
+        * impact block allocation and long-term performance. */
+       if (target_bytes < cli->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT)
+               target_bytes = cli->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
+
+       if (target_bytes >= cli->cl_avail_grant) {
+               client_obd_list_unlock(&cli->cl_loi_list_lock);
+               RETURN(0);
+       }
+       client_obd_list_unlock(&cli->cl_loi_list_lock);
 
-        OBD_ALLOC_PTR(body);
-        if (!body)
-                RETURN(-ENOMEM);
+       OBD_ALLOC_PTR(body);
+       if (!body)
+               RETURN(-ENOMEM);
 
-        osc_announce_cached(cli, &body->oa, 0);
+       osc_announce_cached(cli, &body->oa, 0);
 
-        client_obd_list_lock(&cli->cl_loi_list_lock);
-        body->oa.o_grant = cli->cl_avail_grant - target;
-        cli->cl_avail_grant = target;
+       client_obd_list_lock(&cli->cl_loi_list_lock);
+       body->oa.o_grant = cli->cl_avail_grant - target_bytes;
+       cli->cl_avail_grant = target_bytes;
         client_obd_list_unlock(&cli->cl_loi_list_lock);
         if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
                 body->oa.o_valid |= OBD_MD_FLFLAGS;
@@ -951,7 +995,6 @@ int osc_shrink_grant_to_target(struct client_obd *cli, long target)
         RETURN(rc);
 }
 
-#define GRANT_SHRINK_LIMIT PTLRPC_MAX_BRW_SIZE
 static int osc_should_shrink_grant(struct client_obd *client)
 {
         cfs_time_t time = cfs_time_current();
@@ -961,13 +1004,18 @@ static int osc_should_shrink_grant(struct client_obd *client)
              OBD_CONNECT_GRANT_SHRINK) == 0)
                 return 0;
 
-        if (cfs_time_aftereq(time, next_shrink - 5 * CFS_TICK)) {
-                if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
-                    client->cl_avail_grant > GRANT_SHRINK_LIMIT)
-                        return 1;
-                else
-                        osc_update_next_shrink(client);
-        }
+       if (cfs_time_aftereq(time, next_shrink - 5 * CFS_TICK)) {
+               /* Get the current RPC size directly, instead of going via:
+                * cli_brw_size(obd->u.cli.cl_import->imp_obd->obd_self_export)
+                * Keep comment here so that it can be found by searching. */
+               int brw_size = client->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
+
+               if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
+                   client->cl_avail_grant > brw_size)
+                       return 1;
+               else
+                       osc_update_next_shrink(client);
+       }
         return 0;
 }
 
@@ -1025,16 +1073,16 @@ static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
                 cli->cl_avail_grant = ocd->ocd_grant - cli->cl_dirty;
 
         if (cli->cl_avail_grant < 0) {
-                CWARN("%s: available grant < 0, the OSS is probably not running"
-                      " with patch from bug20278 (%ld) \n",
-                      cli->cl_import->imp_obd->obd_name, cli->cl_avail_grant);
-                /* workaround for 1.6 servers which do not have
-                 * the patch from bug20278 */
-                cli->cl_avail_grant = ocd->ocd_grant;
+               CWARN("%s: available grant < 0: avail/ocd/dirty %ld/%u/%ld\n",
+                     cli->cl_import->imp_obd->obd_name, cli->cl_avail_grant,
+                     ocd->ocd_grant, cli->cl_dirty);
+               /* workaround for servers which do not have the patch from
+                * LU-2679 */
+               cli->cl_avail_grant = ocd->ocd_grant;
         }
 
        /* determine the appropriate chunk size used by osc_extent. */
-       cli->cl_chunkbits = max_t(int, CFS_PAGE_SHIFT, ocd->ocd_blocksize);
+       cli->cl_chunkbits = max_t(int, PAGE_CACHE_SHIFT, ocd->ocd_blocksize);
        client_obd_list_unlock(&cli->cl_loi_list_lock);
 
        CDEBUG(D_CACHE, "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld."
@@ -1060,29 +1108,29 @@ static void handle_short_read(int nob_read, obd_count page_count,
         while (nob_read > 0) {
                 LASSERT (page_count > 0);
 
-                if (pga[i]->count > nob_read) {
-                        /* EOF inside this page */
-                        ptr = cfs_kmap(pga[i]->pg) +
-                                (pga[i]->off & ~CFS_PAGE_MASK);
-                        memset(ptr + nob_read, 0, pga[i]->count - nob_read);
-                        cfs_kunmap(pga[i]->pg);
-                        page_count--;
-                        i++;
-                        break;
-                }
+               if (pga[i]->count > nob_read) {
+                       /* EOF inside this page */
+                       ptr = kmap(pga[i]->pg) +
+                               (pga[i]->off & ~CFS_PAGE_MASK);
+                       memset(ptr + nob_read, 0, pga[i]->count - nob_read);
+                       kunmap(pga[i]->pg);
+                       page_count--;
+                       i++;
+                       break;
+               }
 
                 nob_read -= pga[i]->count;
                 page_count--;
                 i++;
         }
 
-        /* zero remaining pages */
-        while (page_count-- > 0) {
-                ptr = cfs_kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
-                memset(ptr, 0, pga[i]->count);
-                cfs_kunmap(pga[i]->pg);
-                i++;
-        }
+       /* zero remaining pages */
+       while (page_count-- > 0) {
+               ptr = kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
+               memset(ptr, 0, pga[i]->count);
+               kunmap(pga[i]->pg);
+               i++;
+       }
 }
 
 static int check_write_rcs(struct ptlrpc_request *req,
@@ -1167,16 +1215,16 @@ static obd_count osc_checksum_bulk(int nob, obd_count pg_count,
                 * simulate an OST->client data error */
                if (i == 0 && opc == OST_READ &&
                    OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE)) {
-                       unsigned char *ptr = cfs_kmap(pga[i]->pg);
+                       unsigned char *ptr = kmap(pga[i]->pg);
                        int off = pga[i]->off & ~CFS_PAGE_MASK;
                        memcpy(ptr + off, "bad1", min(4, nob));
-                       cfs_kunmap(pga[i]->pg);
+                       kunmap(pga[i]->pg);
                }
                cfs_crypto_hash_update_page(hdesc, pga[i]->pg,
                                  pga[i]->off & ~CFS_PAGE_MASK,
                                  count);
-               LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d checksum %x\n",
-                              (int)(pga[i]->off & ~CFS_PAGE_MASK), cksum);
+               LL_CDEBUG_PAGE(D_PAGE, pga[i]->pg, "off %d\n",
+                              (int)(pga[i]->off & ~CFS_PAGE_MASK));
 
                nob -= pga[i]->count;
                pg_count--;
@@ -1255,12 +1303,10 @@ static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
         * retry logic */
        req->rq_no_retry_einprogress = 1;
 
-        if (opc == OST_WRITE)
-                desc = ptlrpc_prep_bulk_imp(req, page_count,
-                                            BULK_GET_SOURCE, OST_BULK_PORTAL);
-        else
-                desc = ptlrpc_prep_bulk_imp(req, page_count,
-                                            BULK_PUT_SINK, OST_BULK_PORTAL);
+       desc = ptlrpc_prep_bulk_imp(req, page_count,
+               cli->cl_import->imp_connect_data.ocd_brw_size >> LNET_MTU_BITS,
+               opc == OST_WRITE ? BULK_GET_SOURCE : BULK_PUT_SINK,
+               OST_BULK_PORTAL);
 
         if (desc == NULL)
                 GOTO(out, rc = -ENOMEM);
@@ -1271,26 +1317,32 @@ static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
         niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
         LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
 
-        lustre_set_wire_obdo(&body->oa, oa);
-
-        obdo_to_ioobj(oa, ioobj);
-        ioobj->ioo_bufcnt = niocount;
-        osc_pack_capa(req, body, ocapa);
-        LASSERT (page_count > 0);
-        pg_prev = pga[0];
+       lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
+
+       obdo_to_ioobj(oa, ioobj);
+       ioobj->ioo_bufcnt = niocount;
+       /* The high bits of ioo_max_brw tells server _maximum_ number of bulks
+        * that might be send for this request.  The actual number is decided
+        * when the RPC is finally sent in ptlrpc_register_bulk(). It sends
+        * "max - 1" for old client compatibility sending "0", and also so the
+        * the actual maximum is a power-of-two number, not one less. LU-1431 */
+       ioobj_max_brw_set(ioobj, desc->bd_md_max_brw);
+       osc_pack_capa(req, body, ocapa);
+       LASSERT(page_count > 0);
+       pg_prev = pga[0];
         for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
                 struct brw_page *pg = pga[i];
                 int poff = pg->off & ~CFS_PAGE_MASK;
 
                 LASSERT(pg->count > 0);
                 /* make sure there is no gap in the middle of page array */
-                LASSERTF(page_count == 1 ||
-                         (ergo(i == 0, poff + pg->count == CFS_PAGE_SIZE) &&
-                          ergo(i > 0 && i < page_count - 1,
-                               poff == 0 && pg->count == CFS_PAGE_SIZE)   &&
-                          ergo(i == page_count - 1, poff == 0)),
-                         "i: %d/%d pg: %p off: "LPU64", count: %u\n",
-                         i, page_count, pg, pg->off, pg->count);
+               LASSERTF(page_count == 1 ||
+                        (ergo(i == 0, poff + pg->count == PAGE_CACHE_SIZE) &&
+                         ergo(i > 0 && i < page_count - 1,
+                              poff == 0 && pg->count == PAGE_CACHE_SIZE)   &&
+                         ergo(i == page_count - 1, poff == 0)),
+                        "i: %d/%d pg: %p off: "LPU64", count: %u\n",
+                        i, page_count, pg, pg->off, pg->count);
 #ifdef __linux__
                 LASSERTF(i == 0 || pg->off > pg_prev->off,
                          "i %d p_c %u pg %p [pri %lu ind %lu] off "LPU64
@@ -1432,20 +1484,18 @@ static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
                 msg = "changed in transit AND doesn't match the original - "
                       "likely false positive due to mmap IO (bug 11742)";
 
-        LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inode "DFID
-                           " object "LPU64"/"LPU64" extent ["LPU64"-"LPU64"]\n",
-                           msg, libcfs_nid2str(peer->nid),
-                           oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
-                           oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
-                           oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
-                           oa->o_id,
-                           oa->o_valid & OBD_MD_FLGROUP ? oa->o_seq : (__u64)0,
-                           pga[0]->off,
-                           pga[page_count-1]->off + pga[page_count-1]->count - 1);
-        CERROR("original client csum %x (type %x), server csum %x (type %x), "
-               "client csum now %x\n", client_cksum, client_cksum_type,
-               server_cksum, cksum_type, new_cksum);
-        return 1;
+       LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inode "DFID
+                          " object "DOSTID" extent ["LPU64"-"LPU64"]\n",
+                          msg, libcfs_nid2str(peer->nid),
+                          oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
+                          oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
+                          oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
+                          POSTID(&oa->o_oi), pga[0]->off,
+                          pga[page_count-1]->off + pga[page_count-1]->count - 1);
+       CERROR("original client csum %x (type %x), server csum %x (type %x), "
+              "client csum now %x\n", client_cksum, client_cksum_type,
+              server_cksum, cksum_type, new_cksum);
+       return 1;
 }
 
 /* Note rc enters this function as number of bytes transferred */
@@ -1554,42 +1604,39 @@ static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
                         router = libcfs_nid2str(req->rq_bulk->bd_sender);
                 }
 
-                if (server_cksum == ~0 && rc > 0) {
-                        CERROR("Protocol error: server %s set the 'checksum' "
-                               "bit, but didn't send a checksum.  Not fatal, "
-                               "but please notify on http://bugs.whamcloud.com/\n",
-                               libcfs_nid2str(peer->nid));
-                } else if (server_cksum != client_cksum) {
-                        LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
-                                           "%s%s%s inode "DFID" object "
-                                           LPU64"/"LPU64" extent "
-                                           "["LPU64"-"LPU64"]\n",
-                                           req->rq_import->imp_obd->obd_name,
-                                           libcfs_nid2str(peer->nid),
-                                           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,
-                                           aa->aa_ppga[0]->off,
-                                           aa->aa_ppga[aa->aa_page_count-1]->off +
-                                           aa->aa_ppga[aa->aa_page_count-1]->count -
-                                                                        1);
-                        CERROR("client %x, server %x, cksum_type %x\n",
-                               client_cksum, server_cksum, cksum_type);
-                        cksum_counter = 0;
-                        aa->aa_oa->o_cksum = client_cksum;
-                        rc = -EAGAIN;
-                } else {
-                        cksum_counter++;
-                        CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
-                        rc = 0;
-                }
+               if (server_cksum == ~0 && rc > 0) {
+                       CERROR("Protocol error: server %s set the 'checksum' "
+                              "bit, but didn't send a checksum.  Not fatal, "
+                              "but please notify on http://bugs.whamcloud.com/\n",
+                              libcfs_nid2str(peer->nid));
+               } else if (server_cksum != client_cksum) {
+                       LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
+                                          "%s%s%s inode "DFID" object "DOSTID
+                                          " extent ["LPU64"-"LPU64"]\n",
+                                          req->rq_import->imp_obd->obd_name,
+                                          libcfs_nid2str(peer->nid),
+                                          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,
+                                          POSTID(&body->oa.o_oi),
+                                          aa->aa_ppga[0]->off,
+                                          aa->aa_ppga[aa->aa_page_count-1]->off +
+                                          aa->aa_ppga[aa->aa_page_count-1]->count -
+                                                                       1);
+                       CERROR("client %x, server %x, cksum_type %x\n",
+                              client_cksum, server_cksum, cksum_type);
+                       cksum_counter = 0;
+                       aa->aa_oa->o_cksum = client_cksum;
+                       rc = -EAGAIN;
+               } else {
+                       cksum_counter++;
+                       CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
+                       rc = 0;
+               }
         } else if (unlikely(client_cksum)) {
                 static int cksum_missed;
 
@@ -1601,8 +1648,9 @@ static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
                 rc = 0;
         }
 out:
-        if (rc >= 0)
-                lustre_get_wire_obdo(aa->aa_oa, &body->oa);
+       if (rc >= 0)
+               lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
+                                    aa->aa_oa, &body->oa);
 
         RETURN(rc);
 }
@@ -1612,16 +1660,16 @@ static int osc_brw_internal(int cmd, struct obd_export *exp, struct obdo *oa,
                             obd_count page_count, struct brw_page **pga,
                             struct obd_capa *ocapa)
 {
-        struct ptlrpc_request *req;
-        int                    rc;
-        cfs_waitq_t            waitq;
-        int                    generation, resends = 0;
-        struct l_wait_info     lwi;
+       struct ptlrpc_request *req;
+       int                    rc;
+       wait_queue_head_t            waitq;
+       int                    generation, resends = 0;
+       struct l_wait_info     lwi;
 
-        ENTRY;
+       ENTRY;
 
-        cfs_waitq_init(&waitq);
-        generation = exp->exp_obd->u.cli.cl_import->imp_generation;
+       init_waitqueue_head(&waitq);
+       generation = exp->exp_obd->u.cli.cl_import->imp_generation;
 
 restart_bulk:
         rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
@@ -1653,17 +1701,17 @@ restart_bulk:
                 if (rc != -EINPROGRESS &&
                     !client_should_resend(resends, &exp->exp_obd->u.cli)) {
                         CERROR("%s: too many resend retries for object: "
-                               ""LPU64":"LPU64", rc = %d.\n",
-                               exp->exp_obd->obd_name, oa->o_id, oa->o_seq, rc);
-                        goto out;
-                }
-                if (generation !=
-                    exp->exp_obd->u.cli.cl_import->imp_generation) {
-                        CDEBUG(D_HA, "%s: resend cross eviction for object: "
-                               ""LPU64":"LPU64", rc = %d.\n",
-                               exp->exp_obd->obd_name, oa->o_id, oa->o_seq, rc);
+                               ""DOSTID", rc = %d.\n", exp->exp_obd->obd_name,
+                              POSTID(&oa->o_oi), rc);
                         goto out;
                 }
+               if (generation !=
+                   exp->exp_obd->u.cli.cl_import->imp_generation) {
+                       CDEBUG(D_HA, "%s: resend cross eviction for object: "
+                              ""DOSTID", rc = %d.\n", exp->exp_obd->obd_name,
+                              POSTID(&oa->o_oi), rc);
+                       goto out;
+               }
 
                 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL,
                                        NULL);
@@ -1713,6 +1761,7 @@ static int osc_brw_redo_request(struct ptlrpc_request *request,
         aa->aa_resends++;
         new_req->rq_interpret_reply = request->rq_interpret_reply;
         new_req->rq_async_args = request->rq_async_args;
+       new_req->rq_commit_cb = request->rq_commit_cb;
        /* cap resend delay to the current request timeout, this is similar to
         * what ptlrpc does (see after_reply()) */
        if (aa->aa_resends > new_req->rq_timeout)
@@ -1728,6 +1777,7 @@ static int osc_brw_redo_request(struct ptlrpc_request *request,
        cfs_list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
        CFS_INIT_LIST_HEAD(&new_aa->aa_exts);
        cfs_list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
+       new_aa->aa_resends = aa->aa_resends;
 
         cfs_list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
                 if (oap->oap_request) {
@@ -1794,7 +1844,7 @@ static obd_count max_unfragmented_pages(struct brw_page **pg, obd_count pages)
                 if (pages == 0)         /* that's all */
                         return count;
 
-                if (offset + pg[i]->count < CFS_PAGE_SIZE)
+               if (offset + pg[i]->count < PAGE_CACHE_SIZE)
                         return count;   /* doesn't end on page boundary */
 
                 i++;
@@ -1914,28 +1964,28 @@ static int brw_interpret(const struct lu_env *env,
         CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
         /* When server return -EINPROGRESS, client should always retry
          * regardless of the number of times the bulk was resent already. */
-        if (osc_recoverable_error(rc)) {
-                if (req->rq_import_generation !=
-                    req->rq_import->imp_generation) {
-                        CDEBUG(D_HA, "%s: resend cross eviction for object: "
-                               ""LPU64":"LPU64", rc = %d.\n",
-                               req->rq_import->imp_obd->obd_name,
-                               aa->aa_oa->o_id, aa->aa_oa->o_seq, rc);
-                } else if (rc == -EINPROGRESS ||
-                    client_should_resend(aa->aa_resends, aa->aa_cli)) {
-                        rc = osc_brw_redo_request(req, aa, rc);
-                } else {
-                        CERROR("%s: too many resent retries for object: "
-                               ""LPU64":"LPU64", rc = %d.\n",
-                               req->rq_import->imp_obd->obd_name,
-                               aa->aa_oa->o_id, aa->aa_oa->o_seq, rc);
-                }
+       if (osc_recoverable_error(rc)) {
+               if (req->rq_import_generation !=
+                   req->rq_import->imp_generation) {
+                       CDEBUG(D_HA, "%s: resend cross eviction for object: "
+                              ""DOSTID", rc = %d.\n",
+                              req->rq_import->imp_obd->obd_name,
+                              POSTID(&aa->aa_oa->o_oi), rc);
+               } else if (rc == -EINPROGRESS ||
+                   client_should_resend(aa->aa_resends, aa->aa_cli)) {
+                       rc = osc_brw_redo_request(req, aa, rc);
+               } else {
+                       CERROR("%s: too many resent retries for object: "
+                              ""LPU64":"LPU64", rc = %d.\n",
+                              req->rq_import->imp_obd->obd_name,
+                              POSTID(&aa->aa_oa->o_oi), rc);
+               }
 
-                if (rc == 0)
-                        RETURN(0);
-                else if (rc == -EAGAIN || rc == -EINPROGRESS)
-                        rc = -EIO;
-        }
+               if (rc == 0)
+                       RETURN(0);
+               else if (rc == -EAGAIN || rc == -EINPROGRESS)
+                       rc = -EIO;
+       }
 
         if (aa->aa_ocapa) {
                 capa_put(aa->aa_ocapa);
@@ -2005,6 +2055,23 @@ static int brw_interpret(const struct lu_env *env,
        RETURN(rc);
 }
 
+static void brw_commit(struct ptlrpc_request *req)
+{
+       spin_lock(&req->rq_lock);
+       /* If osc_inc_unstable_pages (via osc_extent_finish) races with
+        * this called via the rq_commit_cb, I need to ensure
+        * osc_dec_unstable_pages is still called. Otherwise unstable
+        * pages may be leaked. */
+       if (req->rq_unstable) {
+               spin_unlock(&req->rq_lock);
+               osc_dec_unstable_pages(req);
+               spin_lock(&req->rq_lock);
+       } else {
+               req->rq_committed = 1;
+       }
+       spin_unlock(&req->rq_lock);
+}
+
 /**
  * Build an RPC by the list of extent @ext_list. The caller must ensure
  * that the total pages in this list are NOT over max pages per RPC.
@@ -2013,21 +2080,26 @@ static int brw_interpret(const struct lu_env *env,
 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
                  cfs_list_t *ext_list, int cmd, pdl_policy_t pol)
 {
-       struct ptlrpc_request *req = NULL;
-       struct osc_extent *ext;
+       struct ptlrpc_request           *req = NULL;
+       struct osc_extent               *ext;
+       struct brw_page                 **pga = NULL;
+       struct osc_brw_async_args       *aa = NULL;
+       struct obdo                     *oa = NULL;
+       struct osc_async_page           *oap;
+       struct osc_async_page           *tmp;
+       struct cl_req                   *clerq = NULL;
+       enum cl_req_type                crt = (cmd & OBD_BRW_WRITE) ? CRT_WRITE :
+                                                                     CRT_READ;
+       struct ldlm_lock                *lock = NULL;
+       struct cl_req_attr              *crattr = NULL;
+       obd_off                         starting_offset = OBD_OBJECT_EOF;
+       obd_off                         ending_offset = 0;
+       int                             mpflag = 0;
+       int                             mem_tight = 0;
+       int                             page_count = 0;
+       int                             i;
+       int                             rc;
        CFS_LIST_HEAD(rpc_list);
-       struct brw_page **pga = NULL;
-       struct osc_brw_async_args *aa = NULL;
-        struct obdo *oa = NULL;
-        struct osc_async_page *oap;
-        struct osc_async_page *tmp;
-        struct cl_req *clerq = NULL;
-        enum cl_req_type crt = (cmd & OBD_BRW_WRITE) ? CRT_WRITE : CRT_READ;
-        struct ldlm_lock *lock = NULL;
-        struct cl_req_attr crattr;
-       obd_off starting_offset = OBD_OBJECT_EOF;
-       obd_off ending_offset = 0;
-       int i, rc, mpflag = 0, mem_tight = 0, page_count = 0;
 
        ENTRY;
        LASSERT(!cfs_list_empty(ext_list));
@@ -2048,14 +2120,17 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
                                                oap->oap_count;
                        else
                                LASSERT(oap->oap_page_off + oap->oap_count ==
-                                       CFS_PAGE_SIZE);
+                                       PAGE_CACHE_SIZE);
                }
        }
 
        if (mem_tight)
                mpflag = cfs_memory_pressure_get_and_set();
 
-       memset(&crattr, 0, sizeof crattr);
+       OBD_ALLOC(crattr, sizeof(*crattr));
+       if (crattr == NULL)
+               GOTO(out, rc = -ENOMEM);
+
        OBD_ALLOC(pga, sizeof(*pga) * page_count);
        if (pga == NULL)
                GOTO(out, rc = -ENOMEM);
@@ -2069,60 +2144,60 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
                struct cl_page *page = oap2cl_page(oap);
                if (clerq == NULL) {
                        clerq = cl_req_alloc(env, page, crt,
-                                            1 /* only 1-object rpcs for
-                                               * now */);
+                                            1 /* only 1-object rpcs for now */);
                        if (IS_ERR(clerq))
                                GOTO(out, rc = PTR_ERR(clerq));
                        lock = oap->oap_ldlm_lock;
                }
                if (mem_tight)
                        oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
-                pga[i] = &oap->oap_brw_page;
-                pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
-                CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
-                       pga[i]->pg, cfs_page_index(oap->oap_page), oap, pga[i]->flag);
-                i++;
-                cl_req_page_add(env, clerq, page);
-        }
+               pga[i] = &oap->oap_brw_page;
+               pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
+               CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
+                      pga[i]->pg, page_index(oap->oap_page), oap,
+                      pga[i]->flag);
+               i++;
+               cl_req_page_add(env, clerq, page);
+       }
 
-        /* always get the data for the obdo for the rpc */
+       /* always get the data for the obdo for the rpc */
        LASSERT(clerq != NULL);
-       crattr.cra_oa = oa;
-       crattr.cra_capa = NULL;
-       memset(crattr.cra_jobid, 0, JOBSTATS_JOBID_SIZE);
-        cl_req_attr_set(env, clerq, &crattr, ~0ULL);
-        if (lock) {
-                oa->o_handle = lock->l_remote_handle;
-                oa->o_valid |= OBD_MD_FLHANDLE;
-        }
+       crattr->cra_oa = oa;
+       cl_req_attr_set(env, clerq, crattr, ~0ULL);
+       if (lock) {
+               oa->o_handle = lock->l_remote_handle;
+               oa->o_valid |= OBD_MD_FLHANDLE;
+       }
 
-        rc = cl_req_prep(env, clerq);
-        if (rc != 0) {
-                CERROR("cl_req_prep failed: %d\n", rc);
+       rc = cl_req_prep(env, clerq);
+       if (rc != 0) {
+               CERROR("cl_req_prep failed: %d\n", rc);
                GOTO(out, rc);
        }
 
        sort_brw_pages(pga, page_count);
        rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
-                       pga, &req, crattr.cra_capa, 1, 0);
+                       pga, &req, crattr->cra_capa, 1, 0);
        if (rc != 0) {
                CERROR("prep_req failed: %d\n", rc);
                GOTO(out, rc);
        }
 
+       req->rq_commit_cb = brw_commit;
        req->rq_interpret_reply = brw_interpret;
+
        if (mem_tight != 0)
-                req->rq_memalloc = 1;
+               req->rq_memalloc = 1;
 
-        /* Need to update the timestamps after the request is built in case
-         * we race with setattr (locally or in queue at OST).  If OST gets
-         * later setattr before earlier BRW (as determined by the request xid),
-         * the OST will not use BRW timestamps.  Sadly, there is no obvious
-         * way to do this in a single call.  bug 10150 */
-        cl_req_attr_set(env, clerq, &crattr,
-                        OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME);
+       /* Need to update the timestamps after the request is built in case
+        * we race with setattr (locally or in queue at OST).  If OST gets
+        * later setattr before earlier BRW (as determined by the request xid),
+        * the OST will not use BRW timestamps.  Sadly, there is no obvious
+        * way to do this in a single call.  bug 10150 */
+       cl_req_attr_set(env, clerq, crattr,
+                       OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME);
 
-       lustre_msg_set_jobid(req->rq_reqmsg, crattr.cra_jobid);
+       lustre_msg_set_jobid(req->rq_reqmsg, crattr->cra_jobid);
 
        CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
        aa = ptlrpc_req_async_args(req);
@@ -2149,7 +2224,7 @@ int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
                tmp->oap_request = ptlrpc_request_addref(req);
 
        client_obd_list_lock(&cli->cl_loi_list_lock);
-       starting_offset >>= CFS_PAGE_SHIFT;
+       starting_offset >>= PAGE_CACHE_SHIFT;
        if (cmd == OBD_BRW_READ) {
                cli->cl_r_in_flight++;
                lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
@@ -2189,16 +2264,20 @@ out:
        if (mem_tight != 0)
                cfs_memory_pressure_restore(mpflag);
 
-       capa_put(crattr.cra_capa);
+       if (crattr != NULL) {
+               capa_put(crattr->cra_capa);
+               OBD_FREE(crattr, sizeof(*crattr));
+       }
+
        if (rc != 0) {
                LASSERT(req == NULL);
 
-                if (oa)
-                        OBDO_FREE(oa);
-                if (pga)
-                        OBD_FREE(pga, sizeof(*pga) * page_count);
-                /* this should happen rarely and is pretty bad, it makes the
-                 * pending list not follow the dirty order */
+               if (oa)
+                       OBDO_FREE(oa);
+               if (pga)
+                       OBD_FREE(pga, sizeof(*pga) * page_count);
+               /* this should happen rarely and is pretty bad, it makes the
+                * pending list not follow the dirty order */
                while (!cfs_list_empty(ext_list)) {
                        ext = cfs_list_entry(ext_list->next, struct osc_extent,
                                             oe_link);
@@ -2224,17 +2303,17 @@ static int osc_set_lock_data_with_check(struct ldlm_lock *lock,
         LASSERT(lock->l_glimpse_ast == einfo->ei_cb_gl);
 
         lock_res_and_lock(lock);
-        cfs_spin_lock(&osc_ast_guard);
+       spin_lock(&osc_ast_guard);
 
-        if (lock->l_ast_data == NULL)
-                lock->l_ast_data = data;
-        if (lock->l_ast_data == data)
-                set = 1;
+       if (lock->l_ast_data == NULL)
+               lock->l_ast_data = data;
+       if (lock->l_ast_data == data)
+               set = 1;
 
-        cfs_spin_unlock(&osc_ast_guard);
-        unlock_res_and_lock(lock);
+       spin_unlock(&osc_ast_guard);
+       unlock_res_and_lock(lock);
 
-        return set;
+       return set;
 }
 
 static int osc_set_data_with_check(struct lustre_handle *lockh,
@@ -2258,7 +2337,7 @@ static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
         struct ldlm_res_id res_id;
         struct obd_device *obd = class_exp2obd(exp);
 
-        osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_seq, &res_id);
+       ostid_build_res_name(&lsm->lsm_oi, &res_id);
         ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
         return 0;
 }
@@ -2274,7 +2353,7 @@ static int osc_find_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
         struct obd_device *obd = class_exp2obd(exp);
         int rc = 0;
 
-        osc_build_res_name(lsm->lsm_object_id, lsm->lsm_object_seq, &res_id);
+       ostid_build_res_name(&lsm->lsm_oi, &res_id);
         rc = ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
         if (rc == LDLM_ITER_STOP)
                 return(1);
@@ -2285,7 +2364,7 @@ static int osc_find_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
 
 static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
                             obd_enqueue_update_f upcall, void *cookie,
-                            int *flags, int agl, int rc)
+                           __u64 *flags, int agl, int rc)
 {
         int intent = *flags & LDLM_FL_HAS_INTENT;
         ENTRY;
@@ -2298,6 +2377,8 @@ static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
                                                      &RMF_DLM_REP);
 
                         LASSERT(rep != NULL);
+                       rep->lock_policy_res1 =
+                               ptlrpc_status_ntoh(rep->lock_policy_res1);
                         if (rep->lock_policy_res1)
                                 rc = rep->lock_policy_res1;
                 }
@@ -2324,7 +2405,7 @@ static int osc_enqueue_interpret(const struct lu_env *env,
         __u32 mode;
         struct ost_lvb *lvb;
         __u32 lvb_len;
-        int *flags = aa->oa_flags;
+       __u64 *flags = aa->oa_flags;
 
         /* Make a local copy of a lock handle and a mode, because aa->oa_*
          * might be freed anytime after lock upcall has been called. */
@@ -2378,8 +2459,8 @@ static int osc_enqueue_interpret(const struct lu_env *env,
 }
 
 void osc_update_enqueue(struct lustre_handle *lov_lockhp,
-                        struct lov_oinfo *loi, int flags,
-                        struct ost_lvb *lvb, __u32 mode, int rc)
+                       struct lov_oinfo *loi, __u64 flags,
+                       struct ost_lvb *lvb, __u32 mode, int rc)
 {
         struct ldlm_lock *lock = ldlm_handle2lock(lov_lockhp);
 
@@ -2432,20 +2513,20 @@ struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
  * is excluded from the cluster -- such scenarious make the life difficult, so
  * release locks just after they are obtained. */
 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
-                     int *flags, ldlm_policy_data_t *policy,
-                     struct ost_lvb *lvb, int kms_valid,
-                     obd_enqueue_update_f upcall, void *cookie,
-                     struct ldlm_enqueue_info *einfo,
-                     struct lustre_handle *lockh,
-                     struct ptlrpc_request_set *rqset, int async, int agl)
-{
-        struct obd_device *obd = exp->exp_obd;
-        struct ptlrpc_request *req = NULL;
-        int intent = *flags & LDLM_FL_HAS_INTENT;
-        int match_lvb = (agl != 0 ? 0 : LDLM_FL_LVB_READY);
-        ldlm_mode_t mode;
-        int rc;
-        ENTRY;
+                    __u64 *flags, ldlm_policy_data_t *policy,
+                    struct ost_lvb *lvb, int kms_valid,
+                    obd_enqueue_update_f upcall, void *cookie,
+                    struct ldlm_enqueue_info *einfo,
+                    struct lustre_handle *lockh,
+                    struct ptlrpc_request_set *rqset, int async, int agl)
+{
+       struct obd_device *obd = exp->exp_obd;
+       struct ptlrpc_request *req = NULL;
+       int intent = *flags & LDLM_FL_HAS_INTENT;
+       __u64 match_lvb = (agl != 0 ? 0 : LDLM_FL_LVB_READY);
+       ldlm_mode_t mode;
+       int rc;
+       ENTRY;
 
         /* Filesystem lock extents are extended to page boundaries so that
          * dealing with the page cache is a little smoother.  */
@@ -2481,7 +2562,7 @@ int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
         if (mode) {
                 struct ldlm_lock *matched = ldlm_handle2lock(lockh);
 
-                if ((agl != 0) && !(matched->l_flags & LDLM_FL_LVB_READY)) {
+               if ((agl != 0) && !ldlm_is_lvb_ready(matched)) {
                         /* For AGL, if enqueue RPC is sent but the lock is not
                          * granted, then skip to process this strpe.
                          * Return -ECANCELED to tell the caller. */
@@ -2542,7 +2623,7 @@ int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
         *flags &= ~LDLM_FL_BLOCK_GRANTED;
 
         rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
-                              sizeof(*lvb), lockh, async);
+                             sizeof(*lvb), LVB_T_OST, lockh, async);
         if (rqset) {
                 if (!rc) {
                         struct osc_enqueue_args *aa;
@@ -2584,9 +2665,7 @@ static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
         int rc;
         ENTRY;
 
-        osc_build_res_name(oinfo->oi_md->lsm_object_id,
-                           oinfo->oi_md->lsm_object_seq, &res_id);
-
+       ostid_build_res_name(&oinfo->oi_md->lsm_oi, &res_id);
         rc = osc_enqueue_base(exp, &res_id, &oinfo->oi_flags, &oinfo->oi_policy,
                               &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
                               oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid,
@@ -2596,14 +2675,14 @@ static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
 }
 
 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
-                   __u32 type, ldlm_policy_data_t *policy, __u32 mode,
-                   int *flags, void *data, struct lustre_handle *lockh,
-                   int unref)
+                  __u32 type, ldlm_policy_data_t *policy, __u32 mode,
+                  __u64 *flags, void *data, struct lustre_handle *lockh,
+                  int unref)
 {
-        struct obd_device *obd = exp->exp_obd;
-        int lflags = *flags;
-        ldlm_mode_t rc;
-        ENTRY;
+       struct obd_device *obd = exp->exp_obd;
+       __u64 lflags = *flags;
+       ldlm_mode_t rc;
+       ENTRY;
 
         if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
                 RETURN(-EIO);
@@ -2666,10 +2745,10 @@ static int osc_cancel_unused(struct obd_export *exp,
         struct obd_device *obd = class_exp2obd(exp);
         struct ldlm_res_id res_id, *resp = NULL;
 
-        if (lsm != NULL) {
-                resp = osc_build_res_name(lsm->lsm_object_id,
-                                          lsm->lsm_object_seq, &res_id);
-        }
+       if (lsm != NULL) {
+               ostid_build_res_name(&lsm->lsm_oi, &res_id);
+               resp = &res_id;
+       }
 
         return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
 }
@@ -2678,9 +2757,7 @@ static int osc_statfs_interpret(const struct lu_env *env,
                                 struct ptlrpc_request *req,
                                 struct osc_async_args *aa, int rc)
 {
-        struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
         struct obd_statfs *msfs;
-        __u64 used;
         ENTRY;
 
         if (rc == -EBADR)
@@ -2703,51 +2780,6 @@ static int osc_statfs_interpret(const struct lu_env *env,
                 GOTO(out, rc = -EPROTO);
         }
 
-        /* Reinitialize the RDONLY and DEGRADED flags at the client
-         * on each statfs, so they don't stay set permanently. */
-        cfs_spin_lock(&cli->cl_oscc.oscc_lock);
-
-        if (unlikely(msfs->os_state & OS_STATE_DEGRADED))
-                cli->cl_oscc.oscc_flags |= OSCC_FLAG_DEGRADED;
-        else if (unlikely(cli->cl_oscc.oscc_flags & OSCC_FLAG_DEGRADED))
-                cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_DEGRADED;
-
-        if (unlikely(msfs->os_state & OS_STATE_READONLY))
-                cli->cl_oscc.oscc_flags |= OSCC_FLAG_RDONLY;
-        else if (unlikely(cli->cl_oscc.oscc_flags & OSCC_FLAG_RDONLY))
-                cli->cl_oscc.oscc_flags &= ~OSCC_FLAG_RDONLY;
-
-        /* Add a bit of hysteresis so this flag isn't continually flapping,
-         * and ensure that new files don't get extremely fragmented due to
-         * only a small amount of available space in the filesystem.
-         * We want to set the NOSPC flag when there is less than ~0.1% free
-         * and clear it when there is at least ~0.2% free space, so:
-         *                   avail < ~0.1% max          max = avail + used
-         *            1025 * avail < avail + used       used = blocks - free
-         *            1024 * avail < used
-         *            1024 * avail < blocks - free
-         *                   avail < ((blocks - free) >> 10)
-         *
-         * On very large disk, say 16TB 0.1% will be 16 GB. We don't want to
-         * lose that amount of space so in those cases we report no space left
-         * if their is less than 1 GB left.                             */
-        used = min_t(__u64,(msfs->os_blocks - msfs->os_bfree) >> 10, 1 << 30);
-        if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) == 0) &&
-                     ((msfs->os_ffree < 32) || (msfs->os_bavail < used))))
-                cli->cl_oscc.oscc_flags |= OSCC_FLAG_NOSPC;
-        else if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) != 0) &&
-                          (msfs->os_ffree > 64) &&
-                          (msfs->os_bavail > (used << 1)))) {
-                cli->cl_oscc.oscc_flags &= ~(OSCC_FLAG_NOSPC |
-                                             OSCC_FLAG_NOSPC_BLK);
-        }
-
-        if (unlikely(((cli->cl_oscc.oscc_flags & OSCC_FLAG_NOSPC) != 0) &&
-                     (msfs->os_bavail < used)))
-                cli->cl_oscc.oscc_flags |= OSCC_FLAG_NOSPC_BLK;
-
-        cfs_spin_unlock(&cli->cl_oscc.oscc_lock);
-
         *aa->aa_oi->oi_osfs = *msfs;
 out:
         rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
@@ -2810,10 +2842,10 @@ static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
 
         /*Since the request might also come from lprocfs, so we need
          *sync this with client_disconnect_export Bug15684*/
-        cfs_down_read(&obd->u.cli.cl_sem);
+       down_read(&obd->u.cli.cl_sem);
         if (obd->u.cli.cl_import)
                 imp = class_import_get(obd->u.cli.cl_import);
-        cfs_up_read(&obd->u.cli.cl_sem);
+       up_read(&obd->u.cli.cl_sem);
         if (!imp)
                 RETURN(-ENODEV);
 
@@ -2882,7 +2914,7 @@ static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
         /* we only need the header part from user space to get lmm_magic and
          * lmm_stripe_count, (the header part is common to v1 and v3) */
         lum_size = sizeof(struct lov_user_md_v1);
-        if (cfs_copy_from_user(&lum, lump, lum_size))
+       if (copy_from_user(&lum, lump, lum_size))
                 RETURN(-EFAULT);
 
         if ((lum.lmm_magic != LOV_USER_MAGIC_V1) &&
@@ -2902,27 +2934,27 @@ static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
                 if (!lumk)
                         RETURN(-ENOMEM);
 
-                if (lum.lmm_magic == LOV_USER_MAGIC_V1)
-                        lmm_objects = &(((struct lov_user_md_v1 *)lumk)->lmm_objects[0]);
-                else
-                        lmm_objects = &(lumk->lmm_objects[0]);
-                lmm_objects->l_object_id = lsm->lsm_object_id;
-        } else {
-                lum_size = lov_mds_md_size(0, lum.lmm_magic);
-                lumk = &lum;
-        }
+               if (lum.lmm_magic == LOV_USER_MAGIC_V1)
+                       lmm_objects =
+                           &(((struct lov_user_md_v1 *)lumk)->lmm_objects[0]);
+               else
+                       lmm_objects = &(lumk->lmm_objects[0]);
+               lmm_objects->l_ost_oi = lsm->lsm_oi;
+       } else {
+               lum_size = lov_mds_md_size(0, lum.lmm_magic);
+               lumk = &lum;
+       }
 
-        lumk->lmm_object_id = lsm->lsm_object_id;
-        lumk->lmm_object_seq = lsm->lsm_object_seq;
-        lumk->lmm_stripe_count = 1;
+       lumk->lmm_oi = lsm->lsm_oi;
+       lumk->lmm_stripe_count = 1;
 
-        if (cfs_copy_to_user(lump, lumk, lum_size))
-                rc = -EFAULT;
+       if (copy_to_user(lump, lumk, lum_size))
+               rc = -EFAULT;
 
-        if (lumk != &lum)
-                OBD_FREE(lumk, lum_size);
+       if (lumk != &lum)
+               OBD_FREE(lumk, lum_size);
 
-        RETURN(rc);
+       RETURN(rc);
 }
 
 
@@ -2934,10 +2966,10 @@ static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
         int err = 0;
         ENTRY;
 
-        if (!cfs_try_module_get(THIS_MODULE)) {
-                CERROR("Can't get module. Is it alive?");
-                return -EINVAL;
-        }
+       if (!try_module_get(THIS_MODULE)) {
+               CERROR("Can't get module. Is it alive?");
+               return -EINVAL;
+       }
         switch (cmd) {
         case OBD_IOC_LOV_GET_CONFIG: {
                 char *buf;
@@ -2972,7 +3004,7 @@ static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 
                 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
 
-                err = cfs_copy_to_user((void *)uarg, buf, len);
+               err = copy_to_user((void *)uarg, buf, len);
                 if (err)
                         err = -EFAULT;
                 obd_ioctl_freedata(buf, len);
@@ -3002,14 +3034,14 @@ static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
         case OBD_IOC_PING_TARGET:
                 err = ptlrpc_obd_ping(obd);
                 GOTO(out, err);
-        default:
-                CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
-                       cmd, cfs_curproc_comm());
-                GOTO(out, err = -ENOTTY);
-        }
+       default:
+               CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
+                      cmd, current_comm());
+               GOTO(out, err = -ENOTTY);
+       }
 out:
-        cfs_module_put(THIS_MODULE);
-        return err;
+       module_put(THIS_MODULE);
+       return err;
 }
 
 static int osc_get_info(const struct lu_env *env, struct obd_export *exp,
@@ -3062,15 +3094,52 @@ static int osc_get_info(const struct lu_env *env, struct obd_export *exp,
                 ptlrpc_req_finished(req);
                 RETURN(rc);
         } else if (KEY_IS(KEY_FIEMAP)) {
-                struct ptlrpc_request *req;
-                struct ll_user_fiemap *reply;
-                char *tmp;
-                int rc;
+               struct ll_fiemap_info_key *fm_key =
+                               (struct ll_fiemap_info_key *)key;
+               struct ldlm_res_id       res_id;
+               ldlm_policy_data_t       policy;
+               struct lustre_handle     lockh;
+               ldlm_mode_t              mode = 0;
+               struct ptlrpc_request   *req;
+               struct ll_user_fiemap   *reply;
+               char                    *tmp;
+               int                      rc;
+
+               if (!(fm_key->fiemap.fm_flags & FIEMAP_FLAG_SYNC))
+                       goto skip_locking;
+
+               policy.l_extent.start = fm_key->fiemap.fm_start &
+                                               CFS_PAGE_MASK;
+
+               if (OBD_OBJECT_EOF - fm_key->fiemap.fm_length <=
+                   fm_key->fiemap.fm_start + PAGE_CACHE_SIZE - 1)
+                       policy.l_extent.end = OBD_OBJECT_EOF;
+               else
+                       policy.l_extent.end = (fm_key->fiemap.fm_start +
+                               fm_key->fiemap.fm_length +
+                               PAGE_CACHE_SIZE - 1) & CFS_PAGE_MASK;
+
+               ostid_build_res_name(&fm_key->oa.o_oi, &res_id);
+               mode = ldlm_lock_match(exp->exp_obd->obd_namespace,
+                                      LDLM_FL_BLOCK_GRANTED |
+                                      LDLM_FL_LVB_READY,
+                                      &res_id, LDLM_EXTENT, &policy,
+                                      LCK_PR | LCK_PW, &lockh, 0);
+               if (mode) { /* lock is cached on client */
+                       if (mode != LCK_PR) {
+                               ldlm_lock_addref(&lockh, LCK_PR);
+                               ldlm_lock_decref(&lockh, LCK_PW);
+                       }
+               } else { /* no cached lock, needs acquire lock on server side */
+                       fm_key->oa.o_valid |= OBD_MD_FLFLAGS;
+                       fm_key->oa.o_flags |= OBD_FL_SRVLOCK;
+               }
 
+skip_locking:
                 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
                                            &RQF_OST_GET_INFO_FIEMAP);
                 if (req == NULL)
-                        RETURN(-ENOMEM);
+                       GOTO(drop_lock, rc = -ENOMEM);
 
                 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY,
                                      RCL_CLIENT, keylen);
@@ -3082,7 +3151,7 @@ static int osc_get_info(const struct lu_env *env, struct obd_export *exp,
                 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
                 if (rc) {
                         ptlrpc_request_free(req);
-                        RETURN(rc);
+                       GOTO(drop_lock, rc);
                 }
 
                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
@@ -3093,56 +3162,24 @@ static int osc_get_info(const struct lu_env *env, struct obd_export *exp,
                 ptlrpc_request_set_replen(req);
                 rc = ptlrpc_queue_wait(req);
                 if (rc)
-                        GOTO(out1, rc);
+                       GOTO(fini_req, rc);
 
                 reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
                 if (reply == NULL)
-                        GOTO(out1, rc = -EPROTO);
+                       GOTO(fini_req, rc = -EPROTO);
 
                 memcpy(val, reply, *vallen);
-        out1:
+fini_req:
                 ptlrpc_req_finished(req);
-
+drop_lock:
+               if (mode)
+                       ldlm_lock_decref(&lockh, LCK_PR);
                 RETURN(rc);
         }
 
         RETURN(-EINVAL);
 }
 
-static int osc_setinfo_mds_connect_import(struct obd_import *imp)
-{
-        struct llog_ctxt *ctxt;
-        int rc = 0;
-        ENTRY;
-
-        ctxt = llog_get_context(imp->imp_obd, LLOG_MDS_OST_ORIG_CTXT);
-        if (ctxt) {
-                rc = llog_initiator_connect(ctxt);
-                llog_ctxt_put(ctxt);
-        } else {
-                /* XXX return an error? skip setting below flags? */
-        }
-
-        cfs_spin_lock(&imp->imp_lock);
-        imp->imp_server_timeout = 1;
-        imp->imp_pingable = 1;
-        cfs_spin_unlock(&imp->imp_lock);
-        CDEBUG(D_RPCTRACE, "pinging OST %s\n", obd2cli_tgt(imp->imp_obd));
-
-        RETURN(rc);
-}
-
-static int osc_setinfo_mds_conn_interpret(const struct lu_env *env,
-                                          struct ptlrpc_request *req,
-                                          void *aa, int rc)
-{
-        ENTRY;
-        if (rc != 0)
-                RETURN(rc);
-
-        RETURN(osc_setinfo_mds_connect_import(req->rq_import));
-}
-
 static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
                               obd_count keylen, void *key, obd_count vallen,
                               void *val, struct ptlrpc_request_set *set)
@@ -3156,32 +3193,6 @@ static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
 
         OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
 
-        if (KEY_IS(KEY_NEXT_ID)) {
-                obd_id new_val;
-                struct osc_creator *oscc = &obd->u.cli.cl_oscc;
-
-                if (vallen != sizeof(obd_id))
-                        RETURN(-ERANGE);
-                if (val == NULL)
-                        RETURN(-EINVAL);
-
-                if (vallen != sizeof(obd_id))
-                        RETURN(-EINVAL);
-
-                /* avoid race between allocate new object and set next id
-                 * from ll_sync thread */
-                cfs_spin_lock(&oscc->oscc_lock);
-                new_val = *((obd_id*)val) + 1;
-                if (new_val > oscc->oscc_next_id)
-                        oscc->oscc_next_id = new_val;
-                cfs_spin_unlock(&oscc->oscc_lock);
-                CDEBUG(D_HA, "%s: set oscc_next_id = "LPU64"\n",
-                       exp->exp_obd->obd_name,
-                       obd->u.cli.cl_oscc.oscc_next_id);
-
-                RETURN(0);
-        }
-
         if (KEY_IS(KEY_CHECKSUM)) {
                 if (vallen != sizeof(int))
                         RETURN(-EINVAL);
@@ -3199,24 +3210,24 @@ static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
                 RETURN(0);
         }
 
-       if (KEY_IS(KEY_LRU_SET)) {
+       if (KEY_IS(KEY_CACHE_SET)) {
                struct client_obd *cli = &obd->u.cli;
 
-               LASSERT(cli->cl_lru == NULL); /* only once */
-               cli->cl_lru = (struct cl_client_lru *)val;
-               cfs_atomic_inc(&cli->cl_lru->ccl_users);
-               cli->cl_lru_left = &cli->cl_lru->ccl_page_left;
+               LASSERT(cli->cl_cache == NULL); /* only once */
+               cli->cl_cache = (struct cl_client_cache *)val;
+               cfs_atomic_inc(&cli->cl_cache->ccc_users);
+               cli->cl_lru_left = &cli->cl_cache->ccc_lru_left;
 
                /* add this osc into entity list */
                LASSERT(cfs_list_empty(&cli->cl_lru_osc));
-               cfs_spin_lock(&cli->cl_lru->ccl_lock);
-               cfs_list_add(&cli->cl_lru_osc, &cli->cl_lru->ccl_list);
-               cfs_spin_unlock(&cli->cl_lru->ccl_lock);
+               spin_lock(&cli->cl_cache->ccc_lru_lock);
+               cfs_list_add(&cli->cl_lru_osc, &cli->cl_cache->ccc_lru);
+               spin_unlock(&cli->cl_cache->ccc_lru_lock);
 
                RETURN(0);
        }
 
-       if (KEY_IS(KEY_LRU_SHRINK)) {
+       if (KEY_IS(KEY_CACHE_LRU_SHRINK)) {
                struct client_obd *cli = &obd->u.cli;
                int nr = cfs_atomic_read(&cli->cl_lru_in_list) >> 1;
                int target = *(int *)val;
@@ -3236,38 +3247,31 @@ static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
            Even if something bad goes through, we'd get a -EINVAL from OST
            anyway. */
 
-        if (KEY_IS(KEY_GRANT_SHRINK))
-                req = ptlrpc_request_alloc(imp, &RQF_OST_SET_GRANT_INFO);
-        else
-                req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO);
-
-        if (req == NULL)
-                RETURN(-ENOMEM);
-
-        req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
-                             RCL_CLIENT, keylen);
-        req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
-                             RCL_CLIENT, vallen);
-        rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
-        if (rc) {
-                ptlrpc_request_free(req);
-                RETURN(rc);
-        }
+       req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
+                                               &RQF_OST_SET_GRANT_INFO :
+                                               &RQF_OBD_SET_INFO);
+       if (req == NULL)
+               RETURN(-ENOMEM);
+
+       req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
+                            RCL_CLIENT, keylen);
+       if (!KEY_IS(KEY_GRANT_SHRINK))
+               req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
+                                    RCL_CLIENT, vallen);
+       rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
+       if (rc) {
+               ptlrpc_request_free(req);
+               RETURN(rc);
+       }
 
-        tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
-        memcpy(tmp, key, keylen);
-        tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
+       tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
+       memcpy(tmp, key, keylen);
+       tmp = req_capsule_client_get(&req->rq_pill, KEY_IS(KEY_GRANT_SHRINK) ?
+                                                       &RMF_OST_BODY :
+                                                       &RMF_SETINFO_VAL);
         memcpy(tmp, val, vallen);
 
-        if (KEY_IS(KEY_MDS_CONN)) {
-                struct osc_creator *oscc = &obd->u.cli.cl_oscc;
-
-                oscc->oscc_oa.o_seq = (*(__u32 *)val);
-                oscc->oscc_oa.o_valid |= OBD_MD_FLGROUP;
-                LASSERT_SEQ_IS_MDT(oscc->oscc_oa.o_seq);
-                req->rq_no_delay = req->rq_no_resend = 1;
-                req->rq_interpret_reply = osc_setinfo_mds_conn_interpret;
-        } else if (KEY_IS(KEY_GRANT_SHRINK)) {
+       if (KEY_IS(KEY_GRANT_SHRINK)) {
                 struct osc_grant_args *aa;
                 struct obdo *oa;
 
@@ -3335,7 +3339,7 @@ static int osc_reconnect(const struct lu_env *env,
 
                 client_obd_list_lock(&cli->cl_loi_list_lock);
                 data->ocd_grant = (cli->cl_avail_grant + cli->cl_dirty) ?:
-                                2 * cli->cl_max_pages_per_rpc << CFS_PAGE_SHIFT;
+                               2 * cli_brw_size(obd);
                 lost_grant = cli->cl_lost_grant;
                 cli->cl_lost_grant = 0;
                 client_obd_list_unlock(&cli->cl_loi_list_lock);
@@ -3402,14 +3406,6 @@ static int osc_import_event(struct obd_device *obd,
 
         switch (event) {
         case IMP_EVENT_DISCON: {
-                /* Only do this on the MDS OSC's */
-                if (imp->imp_server_timeout) {
-                        struct osc_creator *oscc = &obd->u.cli.cl_oscc;
-
-                        cfs_spin_lock(&oscc->oscc_lock);
-                        oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
-                        cfs_spin_unlock(&oscc->oscc_lock);
-                }
                 cli = &obd->u.cli;
                 client_obd_list_lock(&cli->cl_loi_list_lock);
                 cli->cl_avail_grant = 0;
@@ -3441,15 +3437,6 @@ static int osc_import_event(struct obd_device *obd,
                 break;
         }
         case IMP_EVENT_ACTIVE: {
-                /* Only do this on the MDS OSC's */
-                if (imp->imp_server_timeout) {
-                        struct osc_creator *oscc = &obd->u.cli.cl_oscc;
-
-                        cfs_spin_lock(&oscc->oscc_lock);
-                        oscc->oscc_flags &= ~(OSCC_FLAG_NOSPC |
-                                              OSCC_FLAG_NOSPC_BLK);
-                        cfs_spin_unlock(&oscc->oscc_lock);
-                }
                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
                 break;
         }
@@ -3550,7 +3537,6 @@ int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
                ptlrpc_lprocfs_register_obd(obd);
        }
 
-       oscc_init(obd);
        /* We need to allocate a few requests more, because
         * brw_interpret tries to create new requests before freeing
         * previous ones, Ideally we want to have 2x max_rpcs_in_flight
@@ -3586,9 +3572,9 @@ static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
                 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
                 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
                 ptlrpc_deactivate_import(imp);
-                cfs_spin_lock(&imp->imp_lock);
-                imp->imp_pingable = 0;
-                cfs_spin_unlock(&imp->imp_lock);
+               spin_lock(&imp->imp_lock);
+               imp->imp_pingable = 0;
+               spin_unlock(&imp->imp_lock);
                 break;
         }
         case OBD_CLEANUP_EXPORTS: {
@@ -3627,14 +3613,14 @@ int osc_cleanup(struct obd_device *obd)
        ENTRY;
 
        /* lru cleanup */
-       if (cli->cl_lru != NULL) {
-               LASSERT(cfs_atomic_read(&cli->cl_lru->ccl_users) > 0);
-               cfs_spin_lock(&cli->cl_lru->ccl_lock);
+       if (cli->cl_cache != NULL) {
+               LASSERT(cfs_atomic_read(&cli->cl_cache->ccc_users) > 0);
+               spin_lock(&cli->cl_cache->ccc_lru_lock);
                cfs_list_del_init(&cli->cl_lru_osc);
-               cfs_spin_unlock(&cli->cl_lru->ccl_lock);
+               spin_unlock(&cli->cl_cache->ccc_lru_lock);
                cli->cl_lru_left = NULL;
-               cfs_atomic_dec(&cli->cl_lru->ccl_users);
-               cli->cl_lru = NULL;
+               cfs_atomic_dec(&cli->cl_cache->ccc_users);
+               cli->cl_cache = NULL;
        }
 
         /* free memory of osc quota cache */
@@ -3684,9 +3670,7 @@ struct obd_ops osc_obd_ops = {
         .o_statfs_async         = osc_statfs_async,
         .o_packmd               = osc_packmd,
         .o_unpackmd             = osc_unpackmd,
-        .o_precreate            = osc_precreate,
         .o_create               = osc_create,
-        .o_create_async         = osc_create_async,
         .o_destroy              = osc_destroy,
         .o_getattr              = osc_getattr,
         .o_getattr_async        = osc_getattr_async,
@@ -3712,8 +3696,8 @@ struct obd_ops osc_obd_ops = {
 };
 
 extern struct lu_kmem_descr osc_caches[];
-extern cfs_spinlock_t       osc_ast_guard;
-extern cfs_lock_class_key_t osc_ast_guard_class;
+extern spinlock_t osc_ast_guard;
+extern struct lock_class_key osc_ast_guard_class;
 
 int __init osc_init(void)
 {
@@ -3727,6 +3711,8 @@ int __init osc_init(void)
         CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
 
         rc = lu_kmem_init(osc_caches);
+       if (rc)
+               RETURN(rc);
 
         lprocfs_osc_init_vars(&lvars);
 
@@ -3737,10 +3723,10 @@ int __init osc_init(void)
                 RETURN(rc);
         }
 
-        cfs_spin_lock_init(&osc_ast_guard);
-        cfs_lockdep_set_class(&osc_ast_guard, &osc_ast_guard_class);
+       spin_lock_init(&osc_ast_guard);
+       lockdep_set_class(&osc_ast_guard, &osc_ast_guard_class);
 
-        RETURN(rc);
+       RETURN(rc);
 }
 
 #ifdef __KERNEL__