--- /dev/null
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ */
+
+#define DEBUG_SUBSYSTEM S_OSC
+
+#include "../../include/linux/libcfs/libcfs.h"
+
+
+#include "../include/lustre_dlm.h"
+#include "../include/lustre_net.h"
+#include "../include/lustre/lustre_user.h"
+#include "../include/obd_cksum.h"
+
+#include "../include/lustre_ha.h"
+#include "../include/lprocfs_status.h"
+#include "../include/lustre_debug.h"
+#include "../include/lustre_param.h"
+#include "../include/lustre_fid.h"
+#include "../include/obd_class.h"
+#include "osc_internal.h"
+#include "osc_cl_internal.h"
+
+struct osc_brw_async_args {
+ struct obdo *aa_oa;
+ int aa_requested_nob;
+ int aa_nio_count;
+ u32 aa_page_count;
+ int aa_resends;
+ struct brw_page **aa_ppga;
+ struct client_obd *aa_cli;
+ struct list_head aa_oaps;
+ struct list_head aa_exts;
+ struct obd_capa *aa_ocapa;
+ struct cl_req *aa_clerq;
+};
+
+struct osc_async_args {
+ struct obd_info *aa_oi;
+};
+
+struct osc_setattr_args {
+ struct obdo *sa_oa;
+ obd_enqueue_update_f sa_upcall;
+ void *sa_cookie;
+};
+
+struct osc_fsync_args {
+ struct obd_info *fa_oi;
+ obd_enqueue_update_f fa_upcall;
+ void *fa_cookie;
+};
+
+struct osc_enqueue_args {
+ struct obd_export *oa_exp;
+ __u64 *oa_flags;
+ obd_enqueue_update_f oa_upcall;
+ void *oa_cookie;
+ struct ost_lvb *oa_lvb;
+ struct lustre_handle *oa_lockh;
+ struct ldlm_enqueue_info *oa_ei;
+ unsigned int oa_agl:1;
+};
+
+static void osc_release_ppga(struct brw_page **ppga, u32 count);
+static int brw_interpret(const struct lu_env *env,
+ struct ptlrpc_request *req, void *data, int rc);
+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)
+{
+ int lmm_size;
+
+ lmm_size = sizeof(**lmmp);
+ if (lmmp == NULL)
+ return lmm_size;
+
+ 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 == NULL) {
+ OBD_ALLOC(*lmmp, lmm_size);
+ if (*lmmp == NULL)
+ return -ENOMEM;
+ }
+
+ if (lsm)
+ ostid_cpu_to_le(&lsm->lsm_oi, &(*lmmp)->lmm_oi);
+
+ 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)
+{
+ int lsm_size;
+ struct obd_import *imp = class_exp2cliimp(exp);
+
+ 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 (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;
+
+ 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 (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? */
+ 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;
+
+ return lsm_size;
+}
+
+static inline void osc_pack_capa(struct ptlrpc_request *req,
+ struct ost_body *body, void *capa)
+{
+ struct obd_capa *oc = (struct obd_capa *)capa;
+ struct lustre_capa *c;
+
+ if (!capa)
+ return;
+
+ c = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
+ LASSERT(c);
+ capa_cpy(c, oc);
+ body->oa.o_valid |= OBD_MD_FLOSSCAPA;
+ DEBUG_CAPA(D_SEC, c, "pack");
+}
+
+static inline void osc_pack_req_body(struct ptlrpc_request *req,
+ struct obd_info *oinfo)
+{
+ struct ost_body *body;
+
+ 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);
+}
+
+static inline void osc_set_capa_size(struct ptlrpc_request *req,
+ const struct req_msg_field *field,
+ struct obd_capa *oc)
+{
+ if (oc == NULL)
+ req_capsule_set_size(&req->rq_pill, field, RCL_CLIENT, 0);
+ else
+ /* it is already calculated as sizeof struct obd_capa */
+ ;
+}
+
+static int osc_getattr_interpret(const struct lu_env *env,
+ struct ptlrpc_request *req,
+ struct osc_async_args *aa, int rc)
+{
+ struct ost_body *body;
+
+ if (rc != 0)
+ goto out;
+
+ 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(&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 = 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;
+ aa->aa_oi->oi_oa->o_valid = 0;
+ }
+out:
+ rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
+ return rc;
+}
+
+static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
+ struct ptlrpc_request_set *set)
+{
+ struct ptlrpc_request *req;
+ struct osc_async_args *aa;
+ int rc;
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
+ if (req == NULL)
+ return -ENOMEM;
+
+ osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
+ rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ osc_pack_req_body(req, oinfo);
+
+ ptlrpc_request_set_replen(req);
+ req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_getattr_interpret;
+
+ CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
+ aa = ptlrpc_req_async_args(req);
+ aa->aa_oi = oinfo;
+
+ ptlrpc_set_add_req(set, req);
+ return 0;
+}
+
+static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
+ struct obd_info *oinfo)
+{
+ struct ptlrpc_request *req;
+ struct ost_body *body;
+ int rc;
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
+ if (req == NULL)
+ return -ENOMEM;
+
+ osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
+ rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ osc_pack_req_body(req, oinfo);
+
+ ptlrpc_request_set_replen(req);
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ goto out;
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+ if (body == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+
+ 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);
+
+ oinfo->oi_oa->o_blksize = cli_brw_size(exp->exp_obd);
+ oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
+
+ out:
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
+ struct obd_info *oinfo, struct obd_trans_info *oti)
+{
+ struct ptlrpc_request *req;
+ struct ost_body *body;
+ int rc;
+
+ LASSERT(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP);
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
+ if (req == NULL)
+ return -ENOMEM;
+
+ osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
+ rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ osc_pack_req_body(req, oinfo);
+
+ ptlrpc_request_set_replen(req);
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ goto out;
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+ if (body == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+
+ lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oinfo->oi_oa,
+ &body->oa);
+
+out:
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+static int osc_setattr_interpret(const struct lu_env *env,
+ struct ptlrpc_request *req,
+ struct osc_setattr_args *sa, int rc)
+{
+ struct ost_body *body;
+
+ if (rc != 0)
+ goto out;
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+ if (body == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+
+ 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;
+}
+
+int osc_setattr_async_base(struct obd_export *exp, struct obd_info *oinfo,
+ struct obd_trans_info *oti,
+ obd_enqueue_update_f upcall, void *cookie,
+ struct ptlrpc_request_set *rqset)
+{
+ struct ptlrpc_request *req;
+ struct osc_setattr_args *sa;
+ int rc;
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
+ if (req == NULL)
+ return -ENOMEM;
+
+ osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
+ rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ if (oti && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
+ oinfo->oi_oa->o_lcookie = *oti->oti_logcookies;
+
+ osc_pack_req_body(req, oinfo);
+
+ ptlrpc_request_set_replen(req);
+
+ /* do mds to ost setattr asynchronously */
+ if (!rqset) {
+ /* Do not wait for response. */
+ ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
+ } else {
+ req->rq_interpret_reply =
+ (ptlrpc_interpterer_t)osc_setattr_interpret;
+
+ CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
+ sa = ptlrpc_req_async_args(req);
+ sa->sa_oa = oinfo->oi_oa;
+ sa->sa_upcall = upcall;
+ sa->sa_cookie = cookie;
+
+ if (rqset == PTLRPCD_SET)
+ ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
+ else
+ ptlrpc_set_add_req(rqset, req);
+ }
+
+ return 0;
+}
+
+static int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
+ struct obd_trans_info *oti,
+ struct ptlrpc_request_set *rqset)
+{
+ return osc_setattr_async_base(exp, oinfo, oti,
+ oinfo->oi_cb_up, oinfo, rqset);
+}
+
+int osc_real_create(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md **ea, struct obd_trans_info *oti)
+{
+ struct ptlrpc_request *req;
+ struct ost_body *body;
+ struct lov_stripe_md *lsm;
+ int rc;
+
+ LASSERT(oa);
+ LASSERT(ea);
+
+ lsm = *ea;
+ if (!lsm) {
+ rc = obd_alloc_memmd(exp, &lsm);
+ if (rc < 0)
+ return rc;
+ }
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
+ if (req == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
+ if (rc) {
+ ptlrpc_request_free(req);
+ goto out;
+ }
+
+ 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);
+
+ ptlrpc_request_set_replen(req);
+
+ if ((oa->o_valid & OBD_MD_FLFLAGS) &&
+ oa->o_flags == OBD_FL_DELORPHAN) {
+ DEBUG_REQ(D_HA, req,
+ "delorphan from OST integration");
+ /* Don't resend the delorphan req */
+ req->rq_no_resend = req->rq_no_delay = 1;
+ }
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ goto out_req;
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+ if (body == NULL) {
+ rc = -EPROTO;
+ goto out_req;
+ }
+
+ CDEBUG(D_INFO, "oa flags %x\n", oa->o_flags);
+ lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
+
+ 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_oi = oa->o_oi;
+ *ea = lsm;
+
+ if (oti != NULL) {
+ oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
+
+ if (oa->o_valid & OBD_MD_FLCOOKIE) {
+ if (!oti->oti_logcookies)
+ oti_alloc_cookies(oti, 1);
+ *oti->oti_logcookies = oa->o_lcookie;
+ }
+ }
+
+ CDEBUG(D_HA, "transno: %lld\n",
+ lustre_msg_get_transno(req->rq_repmsg));
+out_req:
+ ptlrpc_req_finished(req);
+out:
+ if (rc && !*ea)
+ obd_free_memmd(exp, &lsm);
+ return rc;
+}
+
+int osc_punch_base(struct obd_export *exp, struct obd_info *oinfo,
+ obd_enqueue_update_f upcall, void *cookie,
+ struct ptlrpc_request_set *rqset)
+{
+ struct ptlrpc_request *req;
+ struct osc_setattr_args *sa;
+ struct ost_body *body;
+ int rc;
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
+ if (req == NULL)
+ return -ENOMEM;
+
+ osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
+ rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+ 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(&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 = (ptlrpc_interpterer_t)osc_setattr_interpret;
+ CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
+ sa = ptlrpc_req_async_args(req);
+ sa->sa_oa = oinfo->oi_oa;
+ sa->sa_upcall = upcall;
+ sa->sa_cookie = cookie;
+ if (rqset == PTLRPCD_SET)
+ ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
+ else
+ ptlrpc_set_add_req(rqset, req);
+
+ return 0;
+}
+
+static int osc_sync_interpret(const struct lu_env *env,
+ struct ptlrpc_request *req,
+ void *arg, int rc)
+{
+ struct osc_fsync_args *fa = arg;
+ struct ost_body *body;
+
+ if (rc)
+ goto out;
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+ if (body == NULL) {
+ CERROR ("can't unpack ost_body\n");
+ rc = -EPROTO;
+ goto out;
+ }
+
+ *fa->fa_oi->oi_oa = body->oa;
+out:
+ rc = fa->fa_upcall(fa->fa_cookie, rc);
+ return rc;
+}
+
+int osc_sync_base(struct obd_export *exp, struct obd_info *oinfo,
+ obd_enqueue_update_f upcall, void *cookie,
+ struct ptlrpc_request_set *rqset)
+{
+ struct ptlrpc_request *req;
+ struct ost_body *body;
+ struct osc_fsync_args *fa;
+ int rc;
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
+ if (req == NULL)
+ return -ENOMEM;
+
+ osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
+ rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
+ if (rc) {
+ ptlrpc_request_free(req);
+ 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(&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;
+
+ CLASSERT(sizeof(*fa) <= sizeof(req->rq_async_args));
+ fa = ptlrpc_req_async_args(req);
+ fa->fa_oi = oinfo;
+ fa->fa_upcall = upcall;
+ fa->fa_cookie = cookie;
+
+ if (rqset == PTLRPCD_SET)
+ ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
+ else
+ ptlrpc_set_add_req(rqset, req);
+
+ return 0;
+}
+
+/* Find and cancel locally locks matched by @mode in the resource found by
+ * @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,
+ struct list_head *cancels,
+ ldlm_mode_t mode, __u64 lock_flags)
+{
+ struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
+ struct ldlm_res_id res_id;
+ struct ldlm_resource *res;
+ int count;
+
+ /* 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,
+ lock_flags, 0, NULL);
+ LDLM_RESOURCE_DELREF(res);
+ ldlm_resource_putref(res);
+ return count;
+}
+
+static int osc_destroy_interpret(const struct lu_env *env,
+ struct ptlrpc_request *req, void *data,
+ int rc)
+{
+ struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
+
+ 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 (atomic_inc_return(&cli->cl_destroy_in_flight) <=
+ cli->cl_max_rpcs_in_flight) {
+ /* The destroy request can be sent */
+ return 1;
+ }
+ if (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;
+
+ 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
+ * care about the return code since the client cannot do anything at all about
+ * a destroy failure.
+ * When the MDS is unlinking a filename, it saves the file objects into a
+ * recovery llog, and these object records are cancelled when the OST reports
+ * they were destroyed and sync'd to disk (i.e. transaction committed).
+ * If the client dies, or the OST is down when the object should be destroyed,
+ * the records are not cancelled, and when the OST reconnects to the MDS next,
+ * it will retrieve the llog unlink logs and then sends the log cancellation
+ * cookies to the MDS after committing destroy transactions. */
+static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
+ struct obdo *oa, struct lov_stripe_md *ea,
+ struct obd_trans_info *oti, struct obd_export *md_export,
+ void *capa)
+{
+ struct client_obd *cli = &exp->exp_obd->u.cli;
+ struct ptlrpc_request *req;
+ struct ost_body *body;
+ LIST_HEAD(cancels);
+ int rc, count;
+
+ if (!oa) {
+ CDEBUG(D_INFO, "oa NULL\n");
+ return -EINVAL;
+ }
+
+ count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
+ LDLM_FL_DISCARD_DATA);
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
+ if (req == NULL) {
+ ldlm_lock_list_put(&cancels, l_bl_ast, count);
+ return -ENOMEM;
+ }
+
+ osc_set_capa_size(req, &RMF_CAPA1, (struct obd_capa *)capa);
+ rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
+ 0, &cancels, count);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ 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(&req->rq_import->imp_connect_data, &body->oa, oa);
+
+ osc_pack_capa(req, body, (struct obd_capa *)capa);
+ ptlrpc_request_set_replen(req);
+
+ /* If osc_destroy is for destroying the unlink orphan,
+ * sent from MDT to OST, which should not be blocked here,
+ * because the process might be triggered by ptlrpcd, and
+ * it is not good to block ptlrpcd thread (b=16006)*/
+ if (!(oa->o_flags & OBD_FL_DELORPHAN)) {
+ req->rq_interpret_reply = osc_destroy_interpret;
+ if (!osc_can_send_destroy(cli)) {
+ struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP,
+ NULL);
+
+ /*
+ * Wait until the number of on-going destroy RPCs drops
+ * under max_rpc_in_flight
+ */
+ l_wait_event_exclusive(cli->cl_destroy_waitq,
+ osc_can_send_destroy(cli), &lwi);
+ }
+ }
+
+ /* Do not wait for response */
+ ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
+ return 0;
+}
+
+static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
+ long writing_bytes)
+{
+ u32 bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
+
+ LASSERT(!(oa->o_valid & bits));
+
+ oa->o_valid |= bits;
+ client_obd_list_lock(&cli->cl_loi_list_lock);
+ oa->o_dirty = cli->cl_dirty;
+ 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(atomic_read(&obd_dirty_pages) -
+ atomic_read(&obd_dirty_transit_pages) >
+ (long)(obd_max_dirty_pages + 1))) {
+ /* The atomic_read() allowing the 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",
+ atomic_read(&obd_dirty_pages),
+ 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;
+ oa->o_dropped = cli->cl_lost_grant;
+ cli->cl_lost_grant = 0;
+ client_obd_list_unlock(&cli->cl_loi_list_lock);
+ CDEBUG(D_CACHE, "dirty: %llu undirty: %u dropped %u grant: %llu\n",
+ oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
+
+}
+
+void osc_update_next_shrink(struct client_obd *cli)
+{
+ cli->cl_next_shrink_grant =
+ cfs_time_shift(cli->cl_grant_shrink_interval);
+ CDEBUG(D_CACHE, "next time %ld to shrink grant \n",
+ cli->cl_next_shrink_grant);
+}
+
+static void __osc_update_grant(struct client_obd *cli, u64 grant)
+{
+ client_obd_list_lock(&cli->cl_loi_list_lock);
+ cli->cl_avail_grant += grant;
+ client_obd_list_unlock(&cli->cl_loi_list_lock);
+}
+
+static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
+{
+ if (body->oa.o_valid & OBD_MD_FLGRANT) {
+ CDEBUG(D_CACHE, "got %llu extra grant\n", body->oa.o_grant);
+ __osc_update_grant(cli, body->oa.o_grant);
+ }
+}
+
+static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
+ u32 keylen, void *key, u32 vallen,
+ void *val, struct ptlrpc_request_set *set);
+
+static int osc_shrink_grant_interpret(const struct lu_env *env,
+ struct ptlrpc_request *req,
+ void *aa, int rc)
+{
+ struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
+ struct obdo *oa = ((struct osc_brw_async_args *)aa)->aa_oa;
+ struct ost_body *body;
+
+ if (rc != 0) {
+ __osc_update_grant(cli, oa->o_grant);
+ goto out;
+ }
+
+ body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+ LASSERT(body);
+ osc_update_grant(cli, body);
+out:
+ OBDO_FREE(oa);
+ return rc;
+}
+
+static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
+{
+ client_obd_list_lock(&cli->cl_loi_list_lock);
+ oa->o_grant = cli->cl_avail_grant / 4;
+ cli->cl_avail_grant -= oa->o_grant;
+ client_obd_list_unlock(&cli->cl_loi_list_lock);
+ if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
+ oa->o_valid |= OBD_MD_FLFLAGS;
+ oa->o_flags = 0;
+ }
+ oa->o_flags |= OBD_FL_SHRINK_GRANT;
+ osc_update_next_shrink(cli);
+}
+
+/* Shrink the current grant, either from some large amount to enough for a
+ * full set of in-flight RPCs, or if we have already shrunk to that limit
+ * then to enough for a single RPC. This avoids keeping more grant than
+ * needed, and avoids shrinking the grant piecemeal. */
+static int osc_shrink_grant(struct client_obd *cli)
+{
+ __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_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_bytes);
+}
+
+int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes)
+{
+ int rc = 0;
+ struct ost_body *body;
+
+ 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;
+
+ 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_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;
+ body->oa.o_flags = 0;
+ }
+ body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
+ osc_update_next_shrink(cli);
+
+ rc = osc_set_info_async(NULL, cli->cl_import->imp_obd->obd_self_export,
+ sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
+ sizeof(*body), body, NULL);
+ if (rc != 0)
+ __osc_update_grant(cli, body->oa.o_grant);
+ OBD_FREE_PTR(body);
+ return rc;
+}
+
+static int osc_should_shrink_grant(struct client_obd *client)
+{
+ unsigned long time = cfs_time_current();
+ unsigned long next_shrink = client->cl_next_shrink_grant;
+
+ if ((client->cl_import->imp_connect_data.ocd_connect_flags &
+ OBD_CONNECT_GRANT_SHRINK) == 0)
+ return 0;
+
+ 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;
+}
+
+static int osc_grant_shrink_grant_cb(struct timeout_item *item, void *data)
+{
+ struct client_obd *client;
+
+ list_for_each_entry(client, &item->ti_obd_list,
+ cl_grant_shrink_list) {
+ if (osc_should_shrink_grant(client))
+ osc_shrink_grant(client);
+ }
+ return 0;
+}
+
+static int osc_add_shrink_grant(struct client_obd *client)
+{
+ int rc;
+
+ rc = ptlrpc_add_timeout_client(client->cl_grant_shrink_interval,
+ TIMEOUT_GRANT,
+ osc_grant_shrink_grant_cb, NULL,
+ &client->cl_grant_shrink_list);
+ if (rc) {
+ CERROR("add grant client %s error %d\n",
+ client->cl_import->imp_obd->obd_name, rc);
+ return rc;
+ }
+ CDEBUG(D_CACHE, "add grant client %s \n",
+ client->cl_import->imp_obd->obd_name);
+ osc_update_next_shrink(client);
+ return 0;
+}
+
+static int osc_del_shrink_grant(struct client_obd *client)
+{
+ return ptlrpc_del_timeout_client(&client->cl_grant_shrink_list,
+ TIMEOUT_GRANT);
+}
+
+static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
+{
+ /*
+ * ocd_grant is the total grant amount we're expect to hold: if we've
+ * been evicted, it's the new avail_grant amount, cl_dirty will drop
+ * to 0 as inflight RPCs fail out; otherwise, it's avail_grant + dirty.
+ *
+ * race is tolerable here: if we're evicted, but imp_state already
+ * left EVICTED state, then cl_dirty must be 0 already.
+ */
+ client_obd_list_lock(&cli->cl_loi_list_lock);
+ if (cli->cl_import->imp_state == LUSTRE_IMP_EVICTED)
+ cli->cl_avail_grant = ocd->ocd_grant;
+ else
+ cli->cl_avail_grant = ocd->ocd_grant - cli->cl_dirty;
+
+ if (cli->cl_avail_grant < 0) {
+ 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, 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 chunk bits: %d\n",
+ cli->cl_import->imp_obd->obd_name,
+ cli->cl_avail_grant, cli->cl_lost_grant, cli->cl_chunkbits);
+
+ if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT_SHRINK &&
+ list_empty(&cli->cl_grant_shrink_list))
+ osc_add_shrink_grant(cli);
+}
+
+/* We assume that the reason this OSC got a short read is because it read
+ * beyond the end of a stripe file; i.e. lustre is reading a sparse file
+ * via the LOV, and it _knows_ it's reading inside the file, it's just that
+ * this stripe never got written at or beyond this stripe offset yet. */
+static void handle_short_read(int nob_read, u32 page_count,
+ struct brw_page **pga)
+{
+ char *ptr;
+ int i = 0;
+
+ /* skip bytes read OK */
+ while (nob_read > 0) {
+ LASSERT (page_count > 0);
+
+ 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 = 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,
+ int requested_nob, int niocount,
+ u32 page_count, struct brw_page **pga)
+{
+ int i;
+ __u32 *remote_rcs;
+
+ remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
+ sizeof(*remote_rcs) *
+ niocount);
+ if (remote_rcs == NULL) {
+ CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
+ return -EPROTO;
+ }
+
+ /* return error if any niobuf was in error */
+ for (i = 0; i < niocount; i++) {
+ if ((int)remote_rcs[i] < 0)
+ return remote_rcs[i];
+
+ if (remote_rcs[i] != 0) {
+ CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
+ i, remote_rcs[i], req);
+ return -EPROTO;
+ }
+ }
+
+ if (req->rq_bulk->bd_nob_transferred != requested_nob) {
+ CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
+ req->rq_bulk->bd_nob_transferred, requested_nob);
+ return -EPROTO;
+ }
+
+ return 0;
+}
+
+static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
+{
+ if (p1->flag != p2->flag) {
+ unsigned mask = ~(OBD_BRW_FROM_GRANT | OBD_BRW_NOCACHE |
+ OBD_BRW_SYNC | OBD_BRW_ASYNC|OBD_BRW_NOQUOTA);
+
+ /* warn if we try to combine flags that we don't know to be
+ * safe to combine */
+ if (unlikely((p1->flag & mask) != (p2->flag & mask))) {
+ CWARN("Saw flags 0x%x and 0x%x in the same brw, please report this at http://bugs.whamcloud.com/\n",
+ p1->flag, p2->flag);
+ }
+ return 0;
+ }
+
+ return (p1->off + p1->count == p2->off);
+}
+
+static u32 osc_checksum_bulk(int nob, u32 pg_count,
+ struct brw_page **pga, int opc,
+ cksum_type_t cksum_type)
+{
+ __u32 cksum;
+ int i = 0;
+ struct cfs_crypto_hash_desc *hdesc;
+ unsigned int bufsize;
+ int err;
+ unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
+
+ LASSERT(pg_count > 0);
+
+ hdesc = cfs_crypto_hash_init(cfs_alg, NULL, 0);
+ if (IS_ERR(hdesc)) {
+ CERROR("Unable to initialize checksum hash %s\n",
+ cfs_crypto_hash_name(cfs_alg));
+ return PTR_ERR(hdesc);
+ }
+
+ while (nob > 0 && pg_count > 0) {
+ int count = pga[i]->count > nob ? nob : pga[i]->count;
+
+ /* corrupt the data before we compute the checksum, to
+ * simulate an OST->client data error */
+ if (i == 0 && opc == OST_READ &&
+ OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE)) {
+ unsigned char *ptr = kmap(pga[i]->pg);
+ int off = pga[i]->off & ~CFS_PAGE_MASK;
+ memcpy(ptr + off, "bad1", min(4, nob));
+ kunmap(pga[i]->pg);
+ }
+ cfs_crypto_hash_update_page(hdesc, pga[i]->pg,
+ pga[i]->off & ~CFS_PAGE_MASK,
+ count);
+ CDEBUG(D_PAGE,
+ "page %p map %p index %lu flags %lx count %u priv %0lx: off %d\n",
+ pga[i]->pg, pga[i]->pg->mapping, pga[i]->pg->index,
+ (long)pga[i]->pg->flags, page_count(pga[i]->pg),
+ page_private(pga[i]->pg),
+ (int)(pga[i]->off & ~CFS_PAGE_MASK));
+
+ nob -= pga[i]->count;
+ pg_count--;
+ i++;
+ }
+
+ bufsize = 4;
+ err = cfs_crypto_hash_final(hdesc, (unsigned char *)&cksum, &bufsize);
+
+ if (err)
+ cfs_crypto_hash_final(hdesc, NULL, NULL);
+
+ /* For sending we only compute the wrong checksum instead
+ * of corrupting the data so it is still correct on a redo */
+ if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
+ cksum++;
+
+ return cksum;
+}
+
+static int osc_brw_prep_request(int cmd, struct client_obd *cli,
+ struct obdo *oa,
+ struct lov_stripe_md *lsm, u32 page_count,
+ struct brw_page **pga,
+ struct ptlrpc_request **reqp,
+ struct obd_capa *ocapa, int reserve,
+ int resend)
+{
+ struct ptlrpc_request *req;
+ struct ptlrpc_bulk_desc *desc;
+ struct ost_body *body;
+ struct obd_ioobj *ioobj;
+ struct niobuf_remote *niobuf;
+ int niocount, i, requested_nob, opc, rc;
+ struct osc_brw_async_args *aa;
+ struct req_capsule *pill;
+ struct brw_page *pg_prev;
+
+ if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
+ return -ENOMEM; /* Recoverable */
+ if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
+ return -EINVAL; /* Fatal */
+
+ if ((cmd & OBD_BRW_WRITE) != 0) {
+ opc = OST_WRITE;
+ req = ptlrpc_request_alloc_pool(cli->cl_import,
+ cli->cl_import->imp_rq_pool,
+ &RQF_OST_BRW_WRITE);
+ } else {
+ opc = OST_READ;
+ req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
+ }
+ if (req == NULL)
+ return -ENOMEM;
+
+ for (niocount = i = 1; i < page_count; i++) {
+ if (!can_merge_pages(pga[i - 1], pga[i]))
+ niocount++;
+ }
+
+ pill = &req->rq_pill;
+ req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
+ sizeof(*ioobj));
+ req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
+ niocount * sizeof(*niobuf));
+ osc_set_capa_size(req, &RMF_CAPA1, ocapa);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+ req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
+ ptlrpc_at_set_req_timeout(req);
+ /* ask ptlrpc not to resend on EINPROGRESS since BRWs have their own
+ * retry logic */
+ req->rq_no_retry_einprogress = 1;
+
+ 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) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ /* NB request now owns desc and will free it when it gets freed */
+
+ body = req_capsule_client_get(pill, &RMF_OST_BODY);
+ ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
+ niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
+ LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
+
+ 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 == 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: %llu, count: %u\n",
+ i, page_count, pg, pg->off, pg->count);
+ LASSERTF(i == 0 || pg->off > pg_prev->off,
+ "i %d p_c %u pg %p [pri %lu ind %lu] off %llu prev_pg %p [pri %lu ind %lu] off %llu\n",
+ i, page_count,
+ pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
+ pg_prev->pg, page_private(pg_prev->pg),
+ pg_prev->pg->index, pg_prev->off);
+ LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
+ (pg->flag & OBD_BRW_SRVLOCK));
+
+ ptlrpc_prep_bulk_page_pin(desc, pg->pg, poff, pg->count);
+ requested_nob += pg->count;
+
+ if (i > 0 && can_merge_pages(pg_prev, pg)) {
+ niobuf--;
+ niobuf->len += pg->count;
+ } else {
+ niobuf->offset = pg->off;
+ niobuf->len = pg->count;
+ niobuf->flags = pg->flag;
+ }
+ pg_prev = pg;
+ }
+
+ LASSERTF((void *)(niobuf - niocount) ==
+ req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
+ "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
+ &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
+
+ osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
+ if (resend) {
+ if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
+ body->oa.o_valid |= OBD_MD_FLFLAGS;
+ body->oa.o_flags = 0;
+ }
+ body->oa.o_flags |= OBD_FL_RECOV_RESEND;
+ }
+
+ if (osc_should_shrink_grant(cli))
+ osc_shrink_grant_local(cli, &body->oa);
+
+ /* size[REQ_REC_OFF] still sizeof (*body) */
+ if (opc == OST_WRITE) {
+ if (cli->cl_checksum &&
+ !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
+ /* store cl_cksum_type in a local variable since
+ * it can be changed via lprocfs */
+ cksum_type_t cksum_type = cli->cl_cksum_type;
+
+ if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
+ oa->o_flags &= OBD_FL_LOCAL_MASK;
+ body->oa.o_flags = 0;
+ }
+ body->oa.o_flags |= cksum_type_pack(cksum_type);
+ body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
+ body->oa.o_cksum = osc_checksum_bulk(requested_nob,
+ page_count, pga,
+ OST_WRITE,
+ cksum_type);
+ CDEBUG(D_PAGE, "checksum at write origin: %x\n",
+ body->oa.o_cksum);
+ /* save this in 'oa', too, for later checking */
+ oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
+ oa->o_flags |= cksum_type_pack(cksum_type);
+ } else {
+ /* clear out the checksum flag, in case this is a
+ * resend but cl_checksum is no longer set. b=11238 */
+ oa->o_valid &= ~OBD_MD_FLCKSUM;
+ }
+ oa->o_cksum = body->oa.o_cksum;
+ /* 1 RC per niobuf */
+ req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
+ sizeof(__u32) * niocount);
+ } else {
+ if (cli->cl_checksum &&
+ !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
+ if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
+ body->oa.o_flags = 0;
+ body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
+ body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
+ }
+ }
+ ptlrpc_request_set_replen(req);
+
+ CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
+ aa = ptlrpc_req_async_args(req);
+ aa->aa_oa = oa;
+ aa->aa_requested_nob = requested_nob;
+ aa->aa_nio_count = niocount;
+ aa->aa_page_count = page_count;
+ aa->aa_resends = 0;
+ aa->aa_ppga = pga;
+ aa->aa_cli = cli;
+ INIT_LIST_HEAD(&aa->aa_oaps);
+ if (ocapa && reserve)
+ aa->aa_ocapa = capa_get(ocapa);
+
+ *reqp = req;
+ return 0;
+
+ out:
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
+ __u32 client_cksum, __u32 server_cksum, int nob,
+ u32 page_count, struct brw_page **pga,
+ cksum_type_t client_cksum_type)
+{
+ __u32 new_cksum;
+ char *msg;
+ cksum_type_t cksum_type;
+
+ if (server_cksum == client_cksum) {
+ CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
+ return 0;
+ }
+
+ cksum_type = cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
+ oa->o_flags : 0);
+ new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
+ cksum_type);
+
+ if (cksum_type != client_cksum_type)
+ msg = "the server did not use the checksum type specified in the original request - likely a protocol problem"
+ ;
+ else if (new_cksum == server_cksum)
+ msg = "changed on the client after we checksummed it - likely false positive due to mmap IO (bug 11742)"
+ ;
+ else if (new_cksum == client_cksum)
+ msg = "changed in transit before arrival at OST";
+ else
+ 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 "DOSTID" extent [%llu-%llu]\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 */
+static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
+{
+ struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
+ const lnet_process_id_t *peer =
+ &req->rq_import->imp_connection->c_peer;
+ struct client_obd *cli = aa->aa_cli;
+ struct ost_body *body;
+ __u32 client_cksum = 0;
+
+ if (rc < 0 && rc != -EDQUOT) {
+ DEBUG_REQ(D_INFO, req, "Failed request with rc = %d\n", rc);
+ return rc;
+ }
+
+ LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
+ body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
+ if (body == NULL) {
+ DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
+ return -EPROTO;
+ }
+
+ /* set/clear over quota flag for a uid/gid */
+ if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
+ body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA)) {
+ unsigned int qid[MAXQUOTAS] = { body->oa.o_uid, body->oa.o_gid };
+
+ CDEBUG(D_QUOTA, "setdq for [%u %u] with valid %#llx, flags %x\n",
+ body->oa.o_uid, body->oa.o_gid, body->oa.o_valid,
+ body->oa.o_flags);
+ osc_quota_setdq(cli, qid, body->oa.o_valid, body->oa.o_flags);
+ }
+
+ osc_update_grant(cli, body);
+
+ if (rc < 0)
+ return rc;
+
+ if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
+ client_cksum = aa->aa_oa->o_cksum; /* save for later */
+
+ if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
+ if (rc > 0) {
+ CERROR("Unexpected +ve rc %d\n", rc);
+ return -EPROTO;
+ }
+ LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
+
+ if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
+ return -EAGAIN;
+
+ if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
+ check_write_checksum(&body->oa, peer, client_cksum,
+ body->oa.o_cksum, aa->aa_requested_nob,
+ aa->aa_page_count, aa->aa_ppga,
+ cksum_type_unpack(aa->aa_oa->o_flags)))
+ return -EAGAIN;
+
+ rc = check_write_rcs(req, aa->aa_requested_nob,
+ aa->aa_nio_count,
+ aa->aa_page_count, aa->aa_ppga);
+ goto out;
+ }
+
+ /* The rest of this function executes only for OST_READs */
+
+ /* if unwrap_bulk failed, return -EAGAIN to retry */
+ rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
+ if (rc < 0) {
+ rc = -EAGAIN;
+ goto out;
+ }
+
+ if (rc > aa->aa_requested_nob) {
+ CERROR("Unexpected rc %d (%d requested)\n", rc,
+ aa->aa_requested_nob);
+ return -EPROTO;
+ }
+
+ if (rc != req->rq_bulk->bd_nob_transferred) {
+ CERROR ("Unexpected rc %d (%d transferred)\n",
+ rc, req->rq_bulk->bd_nob_transferred);
+ return -EPROTO;
+ }
+
+ if (rc < aa->aa_requested_nob)
+ handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
+
+ if (body->oa.o_valid & OBD_MD_FLCKSUM) {
+ static int cksum_counter;
+ __u32 server_cksum = body->oa.o_cksum;
+ char *via;
+ char *router;
+ cksum_type_t cksum_type;
+
+ cksum_type = cksum_type_unpack(body->oa.o_valid &OBD_MD_FLFLAGS?
+ body->oa.o_flags : 0);
+ client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
+ aa->aa_ppga, OST_READ,
+ cksum_type);
+
+ if (peer->nid == req->rq_bulk->bd_sender) {
+ via = router = "";
+ } else {
+ via = " via ";
+ router = libcfs_nid2str(req->rq_bulk->bd_sender);
+ }
+
+ if (server_cksum != client_cksum) {
+ LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from %s%s%s inode " DFID " object " DOSTID " extent [%llu-%llu]\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;
+
+ cksum_missed++;
+ if ((cksum_missed & (-cksum_missed)) == cksum_missed)
+ CERROR("Checksum %u requested from %s but not sent\n",
+ cksum_missed, libcfs_nid2str(peer->nid));
+ } else {
+ rc = 0;
+ }
+out:
+ if (rc >= 0)
+ lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
+ aa->aa_oa, &body->oa);
+
+ return rc;
+}
+
+static int osc_brw_redo_request(struct ptlrpc_request *request,
+ struct osc_brw_async_args *aa, int rc)
+{
+ struct ptlrpc_request *new_req;
+ struct osc_brw_async_args *new_aa;
+ struct osc_async_page *oap;
+
+ DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
+ "redo for recoverable error %d", rc);
+
+ rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
+ OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
+ aa->aa_cli, aa->aa_oa,
+ NULL /* lsm unused by osc currently */,
+ aa->aa_page_count, aa->aa_ppga,
+ &new_req, aa->aa_ocapa, 0, 1);
+ if (rc)
+ return rc;
+
+ list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
+ if (oap->oap_request != NULL) {
+ LASSERTF(request == oap->oap_request,
+ "request %p != oap_request %p\n",
+ request, oap->oap_request);
+ if (oap->oap_interrupted) {
+ ptlrpc_req_finished(new_req);
+ return -EINTR;
+ }
+ }
+ }
+ /* New request takes over pga and oaps from old request.
+ * Note that copying a list_head doesn't work, need to move it... */
+ aa->aa_resends++;
+ new_req->rq_interpret_reply = request->rq_interpret_reply;
+ new_req->rq_async_args = request->rq_async_args;
+ /* 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)
+ new_req->rq_sent = get_seconds() + new_req->rq_timeout;
+ else
+ new_req->rq_sent = get_seconds() + aa->aa_resends;
+ new_req->rq_generation_set = 1;
+ new_req->rq_import_generation = request->rq_import_generation;
+
+ new_aa = ptlrpc_req_async_args(new_req);
+
+ INIT_LIST_HEAD(&new_aa->aa_oaps);
+ list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
+ INIT_LIST_HEAD(&new_aa->aa_exts);
+ list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
+ new_aa->aa_resends = aa->aa_resends;
+
+ list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
+ if (oap->oap_request) {
+ ptlrpc_req_finished(oap->oap_request);
+ oap->oap_request = ptlrpc_request_addref(new_req);
+ }
+ }
+
+ new_aa->aa_ocapa = aa->aa_ocapa;
+ aa->aa_ocapa = NULL;
+
+ /* XXX: This code will run into problem if we're going to support
+ * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
+ * and wait for all of them to be finished. We should inherit request
+ * set from old request. */
+ ptlrpcd_add_req(new_req, PDL_POLICY_SAME, -1);
+
+ DEBUG_REQ(D_INFO, new_req, "new request");
+ return 0;
+}
+
+/*
+ * ugh, we want disk allocation on the target to happen in offset order. we'll
+ * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
+ * fine for our small page arrays and doesn't require allocation. its an
+ * insertion sort that swaps elements that are strides apart, shrinking the
+ * stride down until its '1' and the array is sorted.
+ */
+static void sort_brw_pages(struct brw_page **array, int num)
+{
+ int stride, i, j;
+ struct brw_page *tmp;
+
+ if (num == 1)
+ return;
+ for (stride = 1; stride < num ; stride = (stride * 3) + 1)
+ ;
+
+ do {
+ stride /= 3;
+ for (i = stride ; i < num ; i++) {
+ tmp = array[i];
+ j = i;
+ while (j >= stride && array[j - stride]->off > tmp->off) {
+ array[j] = array[j - stride];
+ j -= stride;
+ }
+ array[j] = tmp;
+ }
+ } while (stride > 1);
+}
+
+static void osc_release_ppga(struct brw_page **ppga, u32 count)
+{
+ LASSERT(ppga != NULL);
+ OBD_FREE(ppga, sizeof(*ppga) * count);
+}
+
+static int brw_interpret(const struct lu_env *env,
+ struct ptlrpc_request *req, void *data, int rc)
+{
+ struct osc_brw_async_args *aa = data;
+ struct osc_extent *ext;
+ struct osc_extent *tmp;
+ struct cl_object *obj = NULL;
+ struct client_obd *cli = aa->aa_cli;
+
+ rc = osc_brw_fini_request(req, rc);
+ 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: " 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: %llu:%llu, 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 (aa->aa_ocapa) {
+ capa_put(aa->aa_ocapa);
+ aa->aa_ocapa = NULL;
+ }
+
+ list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
+ if (obj == NULL && rc == 0) {
+ obj = osc2cl(ext->oe_obj);
+ cl_object_get(obj);
+ }
+
+ list_del_init(&ext->oe_link);
+ osc_extent_finish(env, ext, 1, rc);
+ }
+ LASSERT(list_empty(&aa->aa_exts));
+ LASSERT(list_empty(&aa->aa_oaps));
+
+ if (obj != NULL) {
+ struct obdo *oa = aa->aa_oa;
+ struct cl_attr *attr = &osc_env_info(env)->oti_attr;
+ unsigned long valid = 0;
+
+ LASSERT(rc == 0);
+ if (oa->o_valid & OBD_MD_FLBLOCKS) {
+ attr->cat_blocks = oa->o_blocks;
+ valid |= CAT_BLOCKS;
+ }
+ if (oa->o_valid & OBD_MD_FLMTIME) {
+ attr->cat_mtime = oa->o_mtime;
+ valid |= CAT_MTIME;
+ }
+ if (oa->o_valid & OBD_MD_FLATIME) {
+ attr->cat_atime = oa->o_atime;
+ valid |= CAT_ATIME;
+ }
+ if (oa->o_valid & OBD_MD_FLCTIME) {
+ attr->cat_ctime = oa->o_ctime;
+ valid |= CAT_CTIME;
+ }
+ if (valid != 0) {
+ cl_object_attr_lock(obj);
+ cl_object_attr_set(env, obj, attr, valid);
+ cl_object_attr_unlock(obj);
+ }
+ cl_object_put(env, obj);
+ }
+ OBDO_FREE(aa->aa_oa);
+
+ cl_req_completion(env, aa->aa_clerq, rc < 0 ? rc :
+ req->rq_bulk->bd_nob_transferred);
+ osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
+ ptlrpc_lprocfs_brw(req, req->rq_bulk->bd_nob_transferred);
+
+ client_obd_list_lock(&cli->cl_loi_list_lock);
+ /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
+ * is called so we know whether to go to sync BRWs or wait for more
+ * RPCs to complete */
+ if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
+ cli->cl_w_in_flight--;
+ else
+ cli->cl_r_in_flight--;
+ osc_wake_cache_waiters(cli);
+ client_obd_list_unlock(&cli->cl_loi_list_lock);
+
+ osc_io_unplug(env, cli, NULL, PDL_POLICY_SAME);
+ return rc;
+}
+
+/**
+ * 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.
+ * Extents in the list must be in OES_RPC state.
+ */
+int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
+ struct list_head *ext_list, int cmd, pdl_policy_t pol)
+{
+ 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;
+ u64 starting_offset = OBD_OBJECT_EOF;
+ u64 ending_offset = 0;
+ int mpflag = 0;
+ int mem_tight = 0;
+ int page_count = 0;
+ int i;
+ int rc;
+ struct ost_body *body;
+ LIST_HEAD(rpc_list);
+
+ LASSERT(!list_empty(ext_list));
+
+ /* add pages into rpc_list to build BRW rpc */
+ list_for_each_entry(ext, ext_list, oe_link) {
+ LASSERT(ext->oe_state == OES_RPC);
+ mem_tight |= ext->oe_memalloc;
+ list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
+ ++page_count;
+ list_add_tail(&oap->oap_rpc_item, &rpc_list);
+ if (starting_offset > oap->oap_obj_off)
+ starting_offset = oap->oap_obj_off;
+ else
+ LASSERT(oap->oap_page_off == 0);
+ if (ending_offset < oap->oap_obj_off + oap->oap_count)
+ ending_offset = oap->oap_obj_off +
+ oap->oap_count;
+ else
+ LASSERT(oap->oap_page_off + oap->oap_count ==
+ PAGE_CACHE_SIZE);
+ }
+ }
+
+ if (mem_tight)
+ mpflag = cfs_memory_pressure_get_and_set();
+
+ OBD_ALLOC(crattr, sizeof(*crattr));
+ if (crattr == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ OBD_ALLOC(pga, sizeof(*pga) * page_count);
+ if (pga == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ OBDO_ALLOC(oa);
+ if (oa == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ i = 0;
+ list_for_each_entry(oap, &rpc_list, oap_rpc_item) {
+ struct cl_page *page = oap2cl_page(oap);
+ if (clerq == NULL) {
+ clerq = cl_req_alloc(env, page, crt,
+ 1 /* only 1-object rpcs for now */);
+ if (IS_ERR(clerq)) {
+ rc = PTR_ERR(clerq);
+ goto out;
+ }
+ 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, 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 */
+ LASSERT(clerq != NULL);
+ 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);
+ goto out;
+ }
+
+ sort_brw_pages(pga, page_count);
+ rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
+ pga, &req, crattr->cra_capa, 1, 0);
+ if (rc != 0) {
+ CERROR("prep_req failed: %d\n", rc);
+ goto out;
+ }
+
+ req->rq_interpret_reply = brw_interpret;
+
+ if (mem_tight != 0)
+ 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 */
+ body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
+ crattr->cra_oa = &body->oa;
+ 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);
+
+ CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
+ aa = ptlrpc_req_async_args(req);
+ INIT_LIST_HEAD(&aa->aa_oaps);
+ list_splice_init(&rpc_list, &aa->aa_oaps);
+ INIT_LIST_HEAD(&aa->aa_exts);
+ list_splice_init(ext_list, &aa->aa_exts);
+ aa->aa_clerq = clerq;
+
+ /* queued sync pages can be torn down while the pages
+ * were between the pending list and the rpc */
+ tmp = NULL;
+ list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
+ /* only one oap gets a request reference */
+ if (tmp == NULL)
+ tmp = oap;
+ if (oap->oap_interrupted && !req->rq_intr) {
+ CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
+ oap, req);
+ ptlrpc_mark_interrupted(req);
+ }
+ }
+ if (tmp != NULL)
+ tmp->oap_request = ptlrpc_request_addref(req);
+
+ client_obd_list_lock(&cli->cl_loi_list_lock);
+ 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);
+ lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
+ lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
+ starting_offset + 1);
+ } else {
+ cli->cl_w_in_flight++;
+ lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
+ lprocfs_oh_tally(&cli->cl_write_rpc_hist, cli->cl_w_in_flight);
+ lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
+ starting_offset + 1);
+ }
+ client_obd_list_unlock(&cli->cl_loi_list_lock);
+
+ DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %dr/%dw in flight",
+ page_count, aa, cli->cl_r_in_flight,
+ cli->cl_w_in_flight);
+
+ /* XXX: Maybe the caller can check the RPC bulk descriptor to
+ * see which CPU/NUMA node the majority of pages were allocated
+ * on, and try to assign the async RPC to the CPU core
+ * (PDL_POLICY_PREFERRED) to reduce cross-CPU memory traffic.
+ *
+ * But on the other hand, we expect that multiple ptlrpcd
+ * threads and the initial write sponsor can run in parallel,
+ * especially when data checksum is enabled, which is CPU-bound
+ * operation and single ptlrpcd thread cannot process in time.
+ * So more ptlrpcd threads sharing BRW load
+ * (with PDL_POLICY_ROUND) seems better.
+ */
+ ptlrpcd_add_req(req, pol, -1);
+ rc = 0;
+
+out:
+ if (mem_tight != 0)
+ cfs_memory_pressure_restore(mpflag);
+
+ 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 */
+ while (!list_empty(ext_list)) {
+ ext = list_entry(ext_list->next, struct osc_extent,
+ oe_link);
+ list_del_init(&ext->oe_link);
+ osc_extent_finish(env, ext, 0, rc);
+ }
+ if (clerq && !IS_ERR(clerq))
+ cl_req_completion(env, clerq, rc);
+ }
+ return rc;
+}
+
+static int osc_set_lock_data_with_check(struct ldlm_lock *lock,
+ struct ldlm_enqueue_info *einfo)
+{
+ void *data = einfo->ei_cbdata;
+ int set = 0;
+
+ LASSERT(lock != NULL);
+ LASSERT(lock->l_blocking_ast == einfo->ei_cb_bl);
+ LASSERT(lock->l_resource->lr_type == einfo->ei_type);
+ LASSERT(lock->l_completion_ast == einfo->ei_cb_cp);
+ LASSERT(lock->l_glimpse_ast == einfo->ei_cb_gl);
+
+ lock_res_and_lock(lock);
+ spin_lock(&osc_ast_guard);
+
+ if (lock->l_ast_data == NULL)
+ lock->l_ast_data = data;
+ if (lock->l_ast_data == data)
+ set = 1;
+
+ spin_unlock(&osc_ast_guard);
+ unlock_res_and_lock(lock);
+
+ return set;
+}
+
+static int osc_set_data_with_check(struct lustre_handle *lockh,
+ struct ldlm_enqueue_info *einfo)
+{
+ struct ldlm_lock *lock = ldlm_handle2lock(lockh);
+ int set = 0;
+
+ if (lock != NULL) {
+ set = osc_set_lock_data_with_check(lock, einfo);
+ LDLM_LOCK_PUT(lock);
+ } else
+ CERROR("lockh %p, data %p - client evicted?\n",
+ lockh, einfo->ei_cbdata);
+ return set;
+}
+
+/* find any ldlm lock of the inode in osc
+ * return 0 not find
+ * 1 find one
+ * < 0 error */
+static int osc_find_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
+ ldlm_iterator_t replace, void *data)
+{
+ struct ldlm_res_id res_id;
+ struct obd_device *obd = class_exp2obd(exp);
+ int rc = 0;
+
+ 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;
+ if (rc == LDLM_ITER_CONTINUE)
+ return 0;
+ return rc;
+}
+
+static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
+ obd_enqueue_update_f upcall, void *cookie,
+ __u64 *flags, int agl, int rc)
+{
+ int intent = *flags & LDLM_FL_HAS_INTENT;
+
+ if (intent) {
+ /* The request was created before ldlm_cli_enqueue call. */
+ if (rc == ELDLM_LOCK_ABORTED) {
+ struct ldlm_reply *rep;
+ rep = req_capsule_server_get(&req->rq_pill,
+ &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;
+ }
+ }
+
+ if ((intent != 0 && rc == ELDLM_LOCK_ABORTED && agl == 0) ||
+ (rc == 0)) {
+ *flags |= LDLM_FL_LVB_READY;
+ CDEBUG(D_INODE, "got kms %llu blocks %llu mtime %llu\n",
+ lvb->lvb_size, lvb->lvb_blocks, lvb->lvb_mtime);
+ }
+
+ /* Call the update callback. */
+ rc = (*upcall)(cookie, rc);
+ return rc;
+}
+
+static int osc_enqueue_interpret(const struct lu_env *env,
+ struct ptlrpc_request *req,
+ struct osc_enqueue_args *aa, int rc)
+{
+ struct ldlm_lock *lock;
+ struct lustre_handle handle;
+ __u32 mode;
+ struct ost_lvb *lvb;
+ __u32 lvb_len;
+ __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. */
+ lustre_handle_copy(&handle, aa->oa_lockh);
+ mode = aa->oa_ei->ei_mode;
+
+ /* ldlm_cli_enqueue is holding a reference on the lock, so it must
+ * be valid. */
+ lock = ldlm_handle2lock(&handle);
+
+ /* Take an additional reference so that a blocking AST that
+ * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
+ * to arrive after an upcall has been executed by
+ * osc_enqueue_fini(). */
+ ldlm_lock_addref(&handle, mode);
+
+ /* Let CP AST to grant the lock first. */
+ OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
+
+ if (aa->oa_agl && rc == ELDLM_LOCK_ABORTED) {
+ lvb = NULL;
+ lvb_len = 0;
+ } else {
+ lvb = aa->oa_lvb;
+ lvb_len = sizeof(*aa->oa_lvb);
+ }
+
+ /* Complete obtaining the lock procedure. */
+ rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
+ mode, flags, lvb, lvb_len, &handle, rc);
+ /* Complete osc stuff. */
+ rc = osc_enqueue_fini(req, aa->oa_lvb, aa->oa_upcall, aa->oa_cookie,
+ flags, aa->oa_agl, rc);
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
+
+ /* Release the lock for async request. */
+ if (lustre_handle_is_used(&handle) && rc == ELDLM_OK)
+ /*
+ * Releases a reference taken by ldlm_cli_enqueue(), if it is
+ * not already released by
+ * ldlm_cli_enqueue_fini()->failed_lock_cleanup()
+ */
+ ldlm_lock_decref(&handle, mode);
+
+ LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
+ aa->oa_lockh, req, aa);
+ ldlm_lock_decref(&handle, mode);
+ LDLM_LOCK_PUT(lock);
+ return rc;
+}
+
+struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
+
+/* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
+ * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
+ * other synchronous requests, however keeping some locks and trying to obtain
+ * others may take a considerable amount of time in a case of ost failure; and
+ * when other sync requests do not get released lock from a client, the client
+ * 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,
+ __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;
+
+ /* Filesystem lock extents are extended to page boundaries so that
+ * dealing with the page cache is a little smoother. */
+ policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
+ policy->l_extent.end |= ~CFS_PAGE_MASK;
+
+ /*
+ * kms is not valid when either object is completely fresh (so that no
+ * locks are cached), or object was evicted. In the latter case cached
+ * lock cannot be used, because it would prime inode state with
+ * potentially stale LVB.
+ */
+ if (!kms_valid)
+ goto no_match;
+
+ /* Next, search for already existing extent locks that will cover us */
+ /* If we're trying to read, we also search for an existing PW lock. The
+ * VFS and page cache already protect us locally, so lots of readers/
+ * writers can share a single PW lock.
+ *
+ * There are problems with conversion deadlocks, so instead of
+ * converting a read lock to a write lock, we'll just enqueue a new
+ * one.
+ *
+ * At some point we should cancel the read lock instead of making them
+ * send us a blocking callback, but there are problems with canceling
+ * locks out from other users right now, too. */
+ mode = einfo->ei_mode;
+ if (einfo->ei_mode == LCK_PR)
+ mode |= LCK_PW;
+ mode = ldlm_lock_match(obd->obd_namespace, *flags | match_lvb, res_id,
+ einfo->ei_type, policy, mode, lockh, 0);
+ if (mode) {
+ struct ldlm_lock *matched = ldlm_handle2lock(lockh);
+
+ if ((agl != 0) && !(matched->l_flags & LDLM_FL_LVB_READY)) {
+ /* 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. */
+ ldlm_lock_decref(lockh, mode);
+ LDLM_LOCK_PUT(matched);
+ return -ECANCELED;
+ } else if (osc_set_lock_data_with_check(matched, einfo)) {
+ *flags |= LDLM_FL_LVB_READY;
+ /* addref the lock only if not async requests and PW
+ * lock is matched whereas we asked for PR. */
+ if (!rqset && einfo->ei_mode != mode)
+ ldlm_lock_addref(lockh, LCK_PR);
+ if (intent) {
+ /* I would like to be able to ASSERT here that
+ * rss <= kms, but I can't, for reasons which
+ * are explained in lov_enqueue() */
+ }
+
+ /* We already have a lock, and it's referenced.
+ *
+ * At this point, the cl_lock::cll_state is CLS_QUEUING,
+ * AGL upcall may change it to CLS_HELD directly. */
+ (*upcall)(cookie, ELDLM_OK);
+
+ if (einfo->ei_mode != mode)
+ ldlm_lock_decref(lockh, LCK_PW);
+ else if (rqset)
+ /* For async requests, decref the lock. */
+ ldlm_lock_decref(lockh, einfo->ei_mode);
+ LDLM_LOCK_PUT(matched);
+ return ELDLM_OK;
+ } else {
+ ldlm_lock_decref(lockh, mode);
+ LDLM_LOCK_PUT(matched);
+ }
+ }
+
+ no_match:
+ if (intent) {
+ LIST_HEAD(cancels);
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp),
+ &RQF_LDLM_ENQUEUE_LVB);
+ if (req == NULL)
+ return -ENOMEM;
+
+ rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
+ sizeof(*lvb));
+ ptlrpc_request_set_replen(req);
+ }
+
+ /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
+ *flags &= ~LDLM_FL_BLOCK_GRANTED;
+
+ rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
+ sizeof(*lvb), LVB_T_OST, lockh, async);
+ if (rqset) {
+ if (!rc) {
+ struct osc_enqueue_args *aa;
+ CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
+ aa = ptlrpc_req_async_args(req);
+ aa->oa_ei = einfo;
+ aa->oa_exp = exp;
+ aa->oa_flags = flags;
+ aa->oa_upcall = upcall;
+ aa->oa_cookie = cookie;
+ aa->oa_lvb = lvb;
+ aa->oa_lockh = lockh;
+ aa->oa_agl = !!agl;
+
+ req->rq_interpret_reply =
+ (ptlrpc_interpterer_t)osc_enqueue_interpret;
+ if (rqset == PTLRPCD_SET)
+ ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
+ else
+ ptlrpc_set_add_req(rqset, req);
+ } else if (intent) {
+ ptlrpc_req_finished(req);
+ }
+ return rc;
+ }
+
+ rc = osc_enqueue_fini(req, lvb, upcall, cookie, flags, agl, rc);
+ if (intent)
+ ptlrpc_req_finished(req);
+
+ return rc;
+}
+
+int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
+ __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;
+ __u64 lflags = *flags;
+ ldlm_mode_t rc;
+
+ if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
+ return -EIO;
+
+ /* Filesystem lock extents are extended to page boundaries so that
+ * dealing with the page cache is a little smoother */
+ policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
+ policy->l_extent.end |= ~CFS_PAGE_MASK;
+
+ /* Next, search for already existing extent locks that will cover us */
+ /* If we're trying to read, we also search for an existing PW lock. The
+ * VFS and page cache already protect us locally, so lots of readers/
+ * writers can share a single PW lock. */
+ rc = mode;
+ if (mode == LCK_PR)
+ rc |= LCK_PW;
+ rc = ldlm_lock_match(obd->obd_namespace, lflags,
+ res_id, type, policy, rc, lockh, unref);
+ if (rc) {
+ if (data != NULL) {
+ if (!osc_set_data_with_check(lockh, data)) {
+ if (!(lflags & LDLM_FL_TEST_LOCK))
+ ldlm_lock_decref(lockh, rc);
+ return 0;
+ }
+ }
+ if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
+ ldlm_lock_addref(lockh, LCK_PR);
+ ldlm_lock_decref(lockh, LCK_PW);
+ }
+ return rc;
+ }
+ return rc;
+}
+
+int osc_cancel_base(struct lustre_handle *lockh, __u32 mode)
+{
+ if (unlikely(mode == LCK_GROUP))
+ ldlm_lock_decref_and_cancel(lockh, mode);
+ else
+ ldlm_lock_decref(lockh, mode);
+
+ return 0;
+}
+
+static int osc_statfs_interpret(const struct lu_env *env,
+ struct ptlrpc_request *req,
+ struct osc_async_args *aa, int rc)
+{
+ struct obd_statfs *msfs;
+
+ if (rc == -EBADR)
+ /* The request has in fact never been sent
+ * due to issues at a higher level (LOV).
+ * Exit immediately since the caller is
+ * aware of the problem and takes care
+ * of the clean up */
+ return rc;
+
+ if ((rc == -ENOTCONN || rc == -EAGAIN) &&
+ (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY)) {
+ rc = 0;
+ goto out;
+ }
+
+ if (rc != 0)
+ goto out;
+
+ msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
+ if (msfs == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+
+ *aa->aa_oi->oi_osfs = *msfs;
+out:
+ rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
+ return rc;
+}
+
+static int osc_statfs_async(struct obd_export *exp,
+ struct obd_info *oinfo, __u64 max_age,
+ struct ptlrpc_request_set *rqset)
+{
+ struct obd_device *obd = class_exp2obd(exp);
+ struct ptlrpc_request *req;
+ struct osc_async_args *aa;
+ int rc;
+
+ /* We could possibly pass max_age in the request (as an absolute
+ * timestamp or a "seconds.usec ago") so the target can avoid doing
+ * extra calls into the filesystem if that isn't necessary (e.g.
+ * during mount that would help a bit). Having relative timestamps
+ * is not so great if request processing is slow, while absolute
+ * timestamps are not ideal because they need time synchronization. */
+ req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
+ if (req == NULL)
+ return -ENOMEM;
+
+ rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+ ptlrpc_request_set_replen(req);
+ req->rq_request_portal = OST_CREATE_PORTAL;
+ ptlrpc_at_set_req_timeout(req);
+
+ if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
+ /* procfs requests not want stat in wait for avoid deadlock */
+ req->rq_no_resend = 1;
+ req->rq_no_delay = 1;
+ }
+
+ req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
+ CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
+ aa = ptlrpc_req_async_args(req);
+ aa->aa_oi = oinfo;
+
+ ptlrpc_set_add_req(rqset, req);
+ return 0;
+}
+
+static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
+ struct obd_statfs *osfs, __u64 max_age, __u32 flags)
+{
+ struct obd_device *obd = class_exp2obd(exp);
+ struct obd_statfs *msfs;
+ struct ptlrpc_request *req;
+ struct obd_import *imp = NULL;
+ int rc;
+
+ /*Since the request might also come from lprocfs, so we need
+ *sync this with client_disconnect_export Bug15684*/
+ down_read(&obd->u.cli.cl_sem);
+ if (obd->u.cli.cl_import)
+ imp = class_import_get(obd->u.cli.cl_import);
+ up_read(&obd->u.cli.cl_sem);
+ if (!imp)
+ return -ENODEV;
+
+ /* We could possibly pass max_age in the request (as an absolute
+ * timestamp or a "seconds.usec ago") so the target can avoid doing
+ * extra calls into the filesystem if that isn't necessary (e.g.
+ * during mount that would help a bit). Having relative timestamps
+ * is not so great if request processing is slow, while absolute
+ * timestamps are not ideal because they need time synchronization. */
+ req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
+
+ class_import_put(imp);
+
+ if (req == NULL)
+ return -ENOMEM;
+
+ rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+ ptlrpc_request_set_replen(req);
+ req->rq_request_portal = OST_CREATE_PORTAL;
+ ptlrpc_at_set_req_timeout(req);
+
+ if (flags & OBD_STATFS_NODELAY) {
+ /* procfs requests not want stat in wait for avoid deadlock */
+ req->rq_no_resend = 1;
+ req->rq_no_delay = 1;
+ }
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ goto out;
+
+ msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
+ if (msfs == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+
+ *osfs = *msfs;
+
+ out:
+ ptlrpc_req_finished(req);
+ return rc;
+}
+
+/* Retrieve object striping information.
+ *
+ * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
+ * the maximum number of OST indices which will fit in the user buffer.
+ * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
+ */
+static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
+{
+ /* we use lov_user_md_v3 because it is larger than lov_user_md_v1 */
+ struct lov_user_md_v3 lum, *lumk;
+ struct lov_user_ost_data_v1 *lmm_objects;
+ int rc = 0, lum_size;
+
+ if (!lsm)
+ return -ENODATA;
+
+ /* 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 (copy_from_user(&lum, lump, lum_size))
+ return -EFAULT;
+
+ if ((lum.lmm_magic != LOV_USER_MAGIC_V1) &&
+ (lum.lmm_magic != LOV_USER_MAGIC_V3))
+ return -EINVAL;
+
+ /* lov_user_md_vX and lov_mds_md_vX must have the same size */
+ LASSERT(sizeof(struct lov_user_md_v1) == sizeof(struct lov_mds_md_v1));
+ LASSERT(sizeof(struct lov_user_md_v3) == sizeof(struct lov_mds_md_v3));
+ LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lumk->lmm_objects[0]));
+
+ /* we can use lov_mds_md_size() to compute lum_size
+ * because lov_user_md_vX and lov_mds_md_vX have the same size */
+ if (lum.lmm_stripe_count > 0) {
+ lum_size = lov_mds_md_size(lum.lmm_stripe_count, lum.lmm_magic);
+ OBD_ALLOC(lumk, lum_size);
+ 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_ost_oi = lsm->lsm_oi;
+ } else {
+ lum_size = lov_mds_md_size(0, lum.lmm_magic);
+ lumk = &lum;
+ }
+
+ lumk->lmm_oi = lsm->lsm_oi;
+ lumk->lmm_stripe_count = 1;
+
+ if (copy_to_user(lump, lumk, lum_size))
+ rc = -EFAULT;
+
+ if (lumk != &lum)
+ OBD_FREE(lumk, lum_size);
+
+ return rc;
+}
+
+
+static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
+ void *karg, void *uarg)
+{
+ struct obd_device *obd = exp->exp_obd;
+ struct obd_ioctl_data *data = karg;
+ int err = 0;
+
+ 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;
+ struct lov_desc *desc;
+ struct obd_uuid uuid;
+
+ buf = NULL;
+ len = 0;
+ if (obd_ioctl_getdata(&buf, &len, (void *)uarg)) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ data = (struct obd_ioctl_data *)buf;
+
+ if (sizeof(*desc) > data->ioc_inllen1) {
+ obd_ioctl_freedata(buf, len);
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (data->ioc_inllen2 < sizeof(uuid)) {
+ obd_ioctl_freedata(buf, len);
+ err = -EINVAL;
+ goto out;
+ }
+
+ desc = (struct lov_desc *)data->ioc_inlbuf1;
+ desc->ld_tgt_count = 1;
+ desc->ld_active_tgt_count = 1;
+ desc->ld_default_stripe_count = 1;
+ desc->ld_default_stripe_size = 0;
+ desc->ld_default_stripe_offset = 0;
+ desc->ld_pattern = 0;
+ memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
+
+ memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
+
+ err = copy_to_user((void *)uarg, buf, len);
+ if (err)
+ err = -EFAULT;
+ obd_ioctl_freedata(buf, len);
+ goto out;
+ }
+ case LL_IOC_LOV_SETSTRIPE:
+ err = obd_alloc_memmd(exp, karg);
+ if (err > 0)
+ err = 0;
+ goto out;
+ case LL_IOC_LOV_GETSTRIPE:
+ err = osc_getstripe(karg, uarg);
+ goto out;
+ case OBD_IOC_CLIENT_RECOVER:
+ err = ptlrpc_recover_import(obd->u.cli.cl_import,
+ data->ioc_inlbuf1, 0);
+ if (err > 0)
+ err = 0;
+ goto out;
+ case IOC_OSC_SET_ACTIVE:
+ err = ptlrpc_set_import_active(obd->u.cli.cl_import,
+ data->ioc_offset);
+ goto out;
+ case OBD_IOC_POLL_QUOTACHECK:
+ err = osc_quota_poll_check(exp, (struct if_quotacheck *)karg);
+ goto out;
+ case OBD_IOC_PING_TARGET:
+ err = ptlrpc_obd_ping(obd);
+ goto out;
+ default:
+ CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
+ cmd, current_comm());
+ err = -ENOTTY;
+ goto out;
+ }
+out:
+ module_put(THIS_MODULE);
+ return err;
+}
+
+static int osc_get_info(const struct lu_env *env, struct obd_export *exp,
+ u32 keylen, void *key, __u32 *vallen, void *val,
+ struct lov_stripe_md *lsm)
+{
+ if (!vallen || !val)
+ return -EFAULT;
+
+ if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
+ __u32 *stripe = val;
+ *vallen = sizeof(*stripe);
+ *stripe = 0;
+ return 0;
+ } else if (KEY_IS(KEY_LAST_ID)) {
+ struct ptlrpc_request *req;
+ u64 *reply;
+ char *tmp;
+ int rc;
+
+ req = ptlrpc_request_alloc(class_exp2cliimp(exp),
+ &RQF_OST_GET_INFO_LAST_ID);
+ if (req == NULL)
+ return -ENOMEM;
+
+ req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
+ RCL_CLIENT, keylen);
+ rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
+ if (rc) {
+ ptlrpc_request_free(req);
+ return rc;
+ }
+
+ tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
+ memcpy(tmp, key, keylen);
+
+ req->rq_no_delay = req->rq_no_resend = 1;
+ ptlrpc_request_set_replen(req);
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ goto out;
+
+ reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
+ if (reply == NULL) {
+ rc = -EPROTO;
+ goto out;
+ }
+
+ *((u64 *)val) = *reply;
+ out:
+ ptlrpc_req_finished(req);
+ return rc;
+ } else if (KEY_IS(KEY_FIEMAP)) {
+ 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) {
+ rc = -ENOMEM;
+ goto drop_lock;
+ }
+
+ req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY,
+ RCL_CLIENT, keylen);
+ req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
+ RCL_CLIENT, *vallen);
+ req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
+ RCL_SERVER, *vallen);
+
+ rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
+ if (rc) {
+ ptlrpc_request_free(req);
+ goto drop_lock;
+ }
+
+ tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
+ memcpy(tmp, key, keylen);
+ tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
+ memcpy(tmp, val, *vallen);
+
+ ptlrpc_request_set_replen(req);
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ goto fini_req;
+
+ reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
+ if (reply == NULL) {
+ rc = -EPROTO;
+ goto fini_req;
+ }
+
+ memcpy(val, reply, *vallen);
+fini_req:
+ ptlrpc_req_finished(req);
+drop_lock:
+ if (mode)
+ ldlm_lock_decref(&lockh, LCK_PR);
+ return rc;
+ }
+
+ return -EINVAL;
+}
+
+static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
+ u32 keylen, void *key, u32 vallen,
+ void *val, struct ptlrpc_request_set *set)
+{
+ struct ptlrpc_request *req;
+ struct obd_device *obd = exp->exp_obd;
+ struct obd_import *imp = class_exp2cliimp(exp);
+ char *tmp;
+ int rc;
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
+
+ if (KEY_IS(KEY_CHECKSUM)) {
+ if (vallen != sizeof(int))
+ return -EINVAL;
+ exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
+ return 0;
+ }
+
+ if (KEY_IS(KEY_SPTLRPC_CONF)) {
+ sptlrpc_conf_client_adapt(obd);
+ return 0;
+ }
+
+ if (KEY_IS(KEY_FLUSH_CTX)) {
+ sptlrpc_import_flush_my_ctx(imp);
+ return 0;
+ }
+
+ if (KEY_IS(KEY_CACHE_SET)) {
+ struct client_obd *cli = &obd->u.cli;
+
+ LASSERT(cli->cl_cache == NULL); /* only once */
+ cli->cl_cache = (struct cl_client_cache *)val;
+ atomic_inc(&cli->cl_cache->ccc_users);
+ cli->cl_lru_left = &cli->cl_cache->ccc_lru_left;
+
+ /* add this osc into entity list */
+ LASSERT(list_empty(&cli->cl_lru_osc));
+ spin_lock(&cli->cl_cache->ccc_lru_lock);
+ 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_CACHE_LRU_SHRINK)) {
+ struct client_obd *cli = &obd->u.cli;
+ int nr = atomic_read(&cli->cl_lru_in_list) >> 1;
+ int target = *(int *)val;
+
+ nr = osc_lru_shrink(cli, min(nr, target));
+ *(int *)val -= nr;
+ return 0;
+ }
+
+ if (!set && !KEY_IS(KEY_GRANT_SHRINK))
+ return -EINVAL;
+
+ /* We pass all other commands directly to OST. Since nobody calls osc
+ methods directly and everybody is supposed to go through LOV, we
+ assume lov checked invalid values for us.
+ The only recognised values so far are evict_by_nid and mds_conn.
+ Even if something bad goes through, we'd get a -EINVAL from OST
+ anyway. */
+
+ 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, KEY_IS(KEY_GRANT_SHRINK) ?
+ &RMF_OST_BODY :
+ &RMF_SETINFO_VAL);
+ memcpy(tmp, val, vallen);
+
+ if (KEY_IS(KEY_GRANT_SHRINK)) {
+ struct osc_brw_async_args *aa;
+ struct obdo *oa;
+
+ CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
+ aa = ptlrpc_req_async_args(req);
+ OBDO_ALLOC(oa);
+ if (!oa) {
+ ptlrpc_req_finished(req);
+ return -ENOMEM;
+ }
+ *oa = ((struct ost_body *)val)->oa;
+ aa->aa_oa = oa;
+ req->rq_interpret_reply = osc_shrink_grant_interpret;
+ }
+
+ ptlrpc_request_set_replen(req);
+ if (!KEY_IS(KEY_GRANT_SHRINK)) {
+ LASSERT(set != NULL);
+ ptlrpc_set_add_req(set, req);
+ ptlrpc_check_set(NULL, set);
+ } else
+ ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
+
+ return 0;
+}
+
+static int osc_reconnect(const struct lu_env *env,
+ struct obd_export *exp, struct obd_device *obd,
+ struct obd_uuid *cluuid,
+ struct obd_connect_data *data,
+ void *localdata)
+{
+ struct client_obd *cli = &obd->u.cli;
+
+ if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
+ long lost_grant;
+
+ client_obd_list_lock(&cli->cl_loi_list_lock);
+ data->ocd_grant = (cli->cl_avail_grant + cli->cl_dirty) ?:
+ 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);
+
+ CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d ocd_grant: %d, lost: %ld.\n",
+ data->ocd_connect_flags,
+ data->ocd_version, data->ocd_grant, lost_grant);
+ }
+
+ return 0;
+}
+
+static int osc_disconnect(struct obd_export *exp)
+{
+ struct obd_device *obd = class_exp2obd(exp);
+ int rc;
+
+ rc = client_disconnect_export(exp);
+ /**
+ * Initially we put del_shrink_grant before disconnect_export, but it
+ * causes the following problem if setup (connect) and cleanup
+ * (disconnect) are tangled together.
+ * connect p1 disconnect p2
+ * ptlrpc_connect_import
+ * ............... class_manual_cleanup
+ * osc_disconnect
+ * del_shrink_grant
+ * ptlrpc_connect_interrupt
+ * init_grant_shrink
+ * add this client to shrink list
+ * cleanup_osc
+ * Bang! pinger trigger the shrink.
+ * So the osc should be disconnected from the shrink list, after we
+ * are sure the import has been destroyed. BUG18662
+ */
+ if (obd->u.cli.cl_import == NULL)
+ osc_del_shrink_grant(&obd->u.cli);
+ return rc;
+}
+
+static int osc_import_event(struct obd_device *obd,
+ struct obd_import *imp,
+ enum obd_import_event event)
+{
+ struct client_obd *cli;
+ int rc = 0;
+
+ LASSERT(imp->imp_obd == obd);
+
+ switch (event) {
+ case IMP_EVENT_DISCON: {
+ cli = &obd->u.cli;
+ client_obd_list_lock(&cli->cl_loi_list_lock);
+ cli->cl_avail_grant = 0;
+ cli->cl_lost_grant = 0;
+ client_obd_list_unlock(&cli->cl_loi_list_lock);
+ break;
+ }
+ case IMP_EVENT_INACTIVE: {
+ rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
+ break;
+ }
+ case IMP_EVENT_INVALIDATE: {
+ struct ldlm_namespace *ns = obd->obd_namespace;
+ struct lu_env *env;
+ int refcheck;
+
+ env = cl_env_get(&refcheck);
+ if (!IS_ERR(env)) {
+ /* Reset grants */
+ cli = &obd->u.cli;
+ /* all pages go to failing rpcs due to the invalid
+ * import */
+ osc_io_unplug(env, cli, NULL, PDL_POLICY_ROUND);
+
+ ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
+ cl_env_put(env, &refcheck);
+ } else
+ rc = PTR_ERR(env);
+ break;
+ }
+ case IMP_EVENT_ACTIVE: {
+ rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
+ break;
+ }
+ case IMP_EVENT_OCD: {
+ struct obd_connect_data *ocd = &imp->imp_connect_data;
+
+ if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
+ osc_init_grant(&obd->u.cli, ocd);
+
+ /* See bug 7198 */
+ if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
+ imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
+
+ rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
+ break;
+ }
+ case IMP_EVENT_DEACTIVATE: {
+ rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE, NULL);
+ break;
+ }
+ case IMP_EVENT_ACTIVATE: {
+ rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE, NULL);
+ break;
+ }
+ default:
+ CERROR("Unknown import event %d\n", event);
+ LBUG();
+ }
+ return rc;
+}
+
+/**
+ * Determine whether the lock can be canceled before replaying the lock
+ * during recovery, see bug16774 for detailed information.
+ *
+ * \retval zero the lock can't be canceled
+ * \retval other ok to cancel
+ */
+static int osc_cancel_for_recovery(struct ldlm_lock *lock)
+{
+ check_res_locked(lock->l_resource);
+
+ /*
+ * Cancel all unused extent lock in granted mode LCK_PR or LCK_CR.
+ *
+ * XXX as a future improvement, we can also cancel unused write lock
+ * if it doesn't have dirty data and active mmaps.
+ */
+ if (lock->l_resource->lr_type == LDLM_EXTENT &&
+ (lock->l_granted_mode == LCK_PR ||
+ lock->l_granted_mode == LCK_CR) &&
+ (osc_dlm_lock_pageref(lock) == 0))
+ return 1;
+
+ return 0;
+}
+
+static int brw_queue_work(const struct lu_env *env, void *data)
+{
+ struct client_obd *cli = data;
+
+ CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
+
+ osc_io_unplug(env, cli, NULL, PDL_POLICY_SAME);
+ return 0;
+}
+
+int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
+{
+ struct lprocfs_static_vars lvars = { NULL };
+ struct client_obd *cli = &obd->u.cli;
+ void *handler;
+ int rc;
+
+ rc = ptlrpcd_addref();
+ if (rc)
+ return rc;
+
+ rc = client_obd_setup(obd, lcfg);
+ if (rc)
+ goto out_ptlrpcd;
+
+ handler = ptlrpcd_alloc_work(cli->cl_import, brw_queue_work, cli);
+ if (IS_ERR(handler)) {
+ rc = PTR_ERR(handler);
+ goto out_client_setup;
+ }
+ cli->cl_writeback_work = handler;
+
+ rc = osc_quota_setup(obd);
+ if (rc)
+ goto out_ptlrpcd_work;
+
+ cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
+ lprocfs_osc_init_vars(&lvars);
+ if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
+ lproc_osc_attach_seqstat(obd);
+ sptlrpc_lprocfs_cliobd_attach(obd);
+ ptlrpc_lprocfs_register_obd(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
+ * reserved, but I'm afraid that might be too much wasted RAM
+ * in fact, so 2 is just my guess and still should work. */
+ cli->cl_import->imp_rq_pool =
+ ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
+ OST_MAXREQSIZE,
+ ptlrpc_add_rqs_to_pool);
+
+ INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
+ ns_register_cancel(obd->obd_namespace, osc_cancel_for_recovery);
+ return rc;
+
+out_ptlrpcd_work:
+ ptlrpcd_destroy_work(handler);
+out_client_setup:
+ client_obd_cleanup(obd);
+out_ptlrpcd:
+ ptlrpcd_decref();
+ return rc;
+}
+
+static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
+{
+ switch (stage) {
+ case OBD_CLEANUP_EARLY: {
+ struct obd_import *imp;
+ imp = obd->u.cli.cl_import;
+ CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
+ /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
+ ptlrpc_deactivate_import(imp);
+ spin_lock(&imp->imp_lock);
+ imp->imp_pingable = 0;
+ spin_unlock(&imp->imp_lock);
+ break;
+ }
+ case OBD_CLEANUP_EXPORTS: {
+ struct client_obd *cli = &obd->u.cli;
+ /* LU-464
+ * for echo client, export may be on zombie list, wait for
+ * zombie thread to cull it, because cli.cl_import will be
+ * cleared in client_disconnect_export():
+ * class_export_destroy() -> obd_cleanup() ->
+ * echo_device_free() -> echo_client_cleanup() ->
+ * obd_disconnect() -> osc_disconnect() ->
+ * client_disconnect_export()
+ */
+ obd_zombie_barrier();
+ if (cli->cl_writeback_work) {
+ ptlrpcd_destroy_work(cli->cl_writeback_work);
+ cli->cl_writeback_work = NULL;
+ }
+ obd_cleanup_client_import(obd);
+ ptlrpc_lprocfs_unregister_obd(obd);
+ lprocfs_obd_cleanup(obd);
+ break;
+ }
+ }
+ return 0;
+}
+
+int osc_cleanup(struct obd_device *obd)
+{
+ struct client_obd *cli = &obd->u.cli;
+ int rc;
+
+ /* lru cleanup */
+ if (cli->cl_cache != NULL) {
+ LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
+ spin_lock(&cli->cl_cache->ccc_lru_lock);
+ list_del_init(&cli->cl_lru_osc);
+ spin_unlock(&cli->cl_cache->ccc_lru_lock);
+ cli->cl_lru_left = NULL;
+ atomic_dec(&cli->cl_cache->ccc_users);
+ cli->cl_cache = NULL;
+ }
+
+ /* free memory of osc quota cache */
+ osc_quota_cleanup(obd);
+
+ rc = client_obd_cleanup(obd);
+
+ ptlrpcd_decref();
+ return rc;
+}
+
+int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
+{
+ struct lprocfs_static_vars lvars = { NULL };
+ int rc = 0;
+
+ lprocfs_osc_init_vars(&lvars);
+
+ switch (lcfg->lcfg_command) {
+ default:
+ rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
+ lcfg, obd);
+ if (rc > 0)
+ rc = 0;
+ break;
+ }
+
+ return rc;
+}
+
+static int osc_process_config(struct obd_device *obd, u32 len, void *buf)
+{
+ return osc_process_config_base(obd, buf);
+}
+
+struct obd_ops osc_obd_ops = {
+ .o_owner = THIS_MODULE,
+ .o_setup = osc_setup,
+ .o_precleanup = osc_precleanup,
+ .o_cleanup = osc_cleanup,
+ .o_add_conn = client_import_add_conn,
+ .o_del_conn = client_import_del_conn,
+ .o_connect = client_connect_import,
+ .o_reconnect = osc_reconnect,
+ .o_disconnect = osc_disconnect,
+ .o_statfs = osc_statfs,
+ .o_statfs_async = osc_statfs_async,
+ .o_packmd = osc_packmd,
+ .o_unpackmd = osc_unpackmd,
+ .o_create = osc_create,
+ .o_destroy = osc_destroy,
+ .o_getattr = osc_getattr,
+ .o_getattr_async = osc_getattr_async,
+ .o_setattr = osc_setattr,
+ .o_setattr_async = osc_setattr_async,
+ .o_find_cbdata = osc_find_cbdata,
+ .o_iocontrol = osc_iocontrol,
+ .o_get_info = osc_get_info,
+ .o_set_info_async = osc_set_info_async,
+ .o_import_event = osc_import_event,
+ .o_process_config = osc_process_config,
+ .o_quotactl = osc_quotactl,
+ .o_quotacheck = osc_quotacheck,
+};
+
+extern struct lu_kmem_descr osc_caches[];
+extern spinlock_t osc_ast_guard;
+extern struct lock_class_key osc_ast_guard_class;
+
+static int __init osc_init(void)
+{
+ struct lprocfs_static_vars lvars = { NULL };
+ int rc;
+
+ /* print an address of _any_ initialized kernel symbol from this
+ * module, to allow debugging with gdb that doesn't support data
+ * symbols from modules.*/
+ 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);
+
+ rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
+ LUSTRE_OSC_NAME, &osc_device_type);
+ if (rc) {
+ lu_kmem_fini(osc_caches);
+ return rc;
+ }
+
+ spin_lock_init(&osc_ast_guard);
+ lockdep_set_class(&osc_ast_guard, &osc_ast_guard_class);
+
+ return rc;
+}
+
+static void /*__exit*/ osc_exit(void)
+{
+ class_unregister_type(LUSTRE_OSC_NAME);
+ lu_kmem_fini(osc_caches);
+}
+
+MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
+MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(LUSTRE_VERSION_STRING);
+
+module_init(osc_init);
+module_exit(osc_exit);
Code Review / kvmfornfv.git / blobdiff