return 0;
}
+static int mdc_get_lock_handle(const struct lu_env *env, struct osc_object *osc,
+ pgoff_t index, struct lustre_handle *lh)
+{
+ struct ldlm_lock *lock;
+
+ /* find DOM lock protecting object */
+ lock = mdc_dlmlock_at_pgoff(env, osc, index,
+ OSC_DAP_FL_TEST_LOCK |
+ OSC_DAP_FL_CANCELING);
+ if (lock == NULL) {
+ struct ldlm_resource *res;
+ struct ldlm_res_id *resname;
+
+ resname = &osc_env_info(env)->oti_resname;
+ fid_build_reg_res_name(lu_object_fid(osc2lu(osc)), resname);
+ res = ldlm_resource_get(osc_export(osc)->exp_obd->obd_namespace,
+ NULL, resname, LDLM_IBITS, 0);
+ ldlm_resource_dump(D_ERROR, res);
+ libcfs_debug_dumpstack(NULL);
+ return -ENOENT;
+ } else {
+ *lh = lock->l_remote_handle;
+ LDLM_LOCK_PUT(lock);
+ }
+ return 0;
+}
+
static int mdc_io_setattr_start(const struct lu_env *env,
const struct cl_io_slice *slice)
{
if (oio->oi_lockless) {
oa->o_flags = OBD_FL_SRVLOCK;
oa->o_valid |= OBD_MD_FLFLAGS;
+ } else {
+ rc = mdc_get_lock_handle(env, cl2osc(obj), CL_PAGE_EOF,
+ &oa->o_handle);
+ if (!rc)
+ oa->o_valid |= OBD_MD_FLHANDLE;
}
init_completion(&cbargs->opc_sync);
attr->cra_oa->o_valid |= OBD_MD_FLID;
if (flags & OBD_MD_FLHANDLE) {
- struct ldlm_lock *lock; /* _some_ lock protecting @apage */
struct osc_page *opg;
opg = osc_cl_page_osc(attr->cra_page, cl2osc(obj));
- lock = mdc_dlmlock_at_pgoff(env, cl2osc(obj), osc_index(opg),
- OSC_DAP_FL_TEST_LOCK | OSC_DAP_FL_CANCELING);
- if (lock == NULL && !opg->ops_srvlock) {
- struct ldlm_resource *res;
- struct ldlm_res_id *resname;
-
- CL_PAGE_DEBUG(D_ERROR, env, attr->cra_page,
- "uncovered page!\n");
-
- resname = &osc_env_info(env)->oti_resname;
- mdc_build_res_name(cl2osc(obj), resname);
- res = ldlm_resource_get(
- osc_export(cl2osc(obj))->exp_obd->obd_namespace,
- NULL, resname, LDLM_IBITS, 0);
- ldlm_resource_dump(D_ERROR, res);
-
- libcfs_debug_dumpstack(NULL);
- LBUG();
- }
-
- /* check for lockless io. */
- if (lock != NULL) {
- attr->cra_oa->o_handle = lock->l_remote_handle;
- attr->cra_oa->o_valid |= OBD_MD_FLHANDLE;
- LDLM_LOCK_PUT(lock);
+ if (!opg->ops_srvlock) {
+ int rc;
+
+ rc = mdc_get_lock_handle(env, cl2osc(obj),
+ osc_index(opg),
+ &attr->cra_oa->o_handle);
+ if (rc) {
+ CL_PAGE_DEBUG(D_ERROR, env, attr->cra_page,
+ "uncovered page!\n");
+ LBUG();
+ } else {
+ attr->cra_oa->o_valid |= OBD_MD_FLHANDLE;
+ }
}
}
}
up_write(&mo->mot_dom_sem);
}
+/**
+ * Lock prolongation for Data-on-MDT.
+ * This is similar to OFD code but for DOM ibits lock.
+ */
+static inline time64_t prolong_timeout(struct ptlrpc_request *req)
+{
+ struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt;
+ time64_t req_timeout;
+
+ if (AT_OFF)
+ return obd_timeout / 2;
+
+ req_timeout = req->rq_deadline - req->rq_arrival_time.tv_sec;
+ return max_t(time64_t, at_est2timeout(at_get(&svcpt->scp_at_estimate)),
+ req_timeout);
+}
+
+static void mdt_prolong_dom_lock(struct tgt_session_info *tsi,
+ struct ldlm_prolong_args *data)
+{
+ struct obdo *oa = &tsi->tsi_ost_body->oa;
+ struct ldlm_lock *lock;
+
+ ENTRY;
+
+ data->lpa_timeout = prolong_timeout(tgt_ses_req(tsi));
+ data->lpa_export = tsi->tsi_exp;
+ data->lpa_resid = tsi->tsi_resid;
+
+ CDEBUG(D_RPCTRACE, "Prolong DOM lock for req %p with x%llu\n",
+ tgt_ses_req(tsi), tgt_ses_req(tsi)->rq_xid);
+
+ if (oa->o_valid & OBD_MD_FLHANDLE) {
+ /* mostly a request should be covered by only one lock, try
+ * fast path. */
+ lock = ldlm_handle2lock(&oa->o_handle);
+ if (lock != NULL) {
+ LASSERT(lock->l_export == data->lpa_export);
+ ldlm_lock_prolong_one(lock, data);
+ lock->l_last_used = ktime_get();
+ LDLM_LOCK_PUT(lock);
+ RETURN_EXIT;
+ }
+ }
+ EXIT;
+}
+
+static int mdt_rw_hpreq_lock_match(struct ptlrpc_request *req,
+ struct ldlm_lock *lock)
+{
+ struct obd_ioobj *ioo;
+ enum ldlm_mode mode;
+ __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
+
+ ENTRY;
+
+ if (!(lock->l_policy_data.l_inodebits.bits & MDS_INODELOCK_DOM))
+ RETURN(0);
+
+ ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
+ LASSERT(ioo != NULL);
+
+ LASSERT(lock->l_resource != NULL);
+ if (!fid_res_name_eq(&ioo->ioo_oid.oi_fid, &lock->l_resource->lr_name))
+ RETURN(0);
+
+ /* a bulk write can only hold a reference on a PW extent lock. */
+ mode = LCK_PW;
+ if (opc == OST_READ)
+ /* whereas a bulk read can be protected by either a PR or PW
+ * extent lock */
+ mode |= LCK_PR;
+
+ if (!(lock->l_granted_mode & mode))
+ RETURN(0);
+
+ RETURN(1);
+}
+
+static int mdt_rw_hpreq_check(struct ptlrpc_request *req)
+{
+ struct tgt_session_info *tsi;
+ struct obd_ioobj *ioo;
+ struct niobuf_remote *rnb;
+ int opc;
+ struct ldlm_prolong_args pa = { 0 };
+
+ ENTRY;
+
+ /* Don't use tgt_ses_info() to get session info, because lock_match()
+ * can be called while request has no processing thread yet. */
+ tsi = lu_context_key_get(&req->rq_session, &tgt_session_key);
+
+ /*
+ * Use LASSERT below because malformed RPCs should have
+ * been filtered out in tgt_hpreq_handler().
+ */
+ opc = lustre_msg_get_opc(req->rq_reqmsg);
+ LASSERT(opc == OST_READ || opc == OST_WRITE);
+
+ ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
+ LASSERT(ioo != NULL);
+
+ rnb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
+ LASSERT(rnb != NULL);
+ LASSERT(!(rnb->rnb_flags & OBD_BRW_SRVLOCK));
+
+ pa.lpa_mode = LCK_PW;
+ if (opc == OST_READ)
+ pa.lpa_mode |= LCK_PR;
+
+ DEBUG_REQ(D_RPCTRACE, req, "%s %s: refresh rw locks: "DFID"\n",
+ tgt_name(tsi->tsi_tgt), current->comm, PFID(&tsi->tsi_fid));
+
+ mdt_prolong_dom_lock(tsi, &pa);
+
+ if (pa.lpa_blocks_cnt > 0) {
+ CDEBUG(D_DLMTRACE,
+ "%s: refreshed %u locks timeout for req %p.\n",
+ tgt_name(tsi->tsi_tgt), pa.lpa_blocks_cnt, req);
+ RETURN(1);
+ }
+
+ RETURN(pa.lpa_locks_cnt > 0 ? 0 : -ESTALE);
+}
+
+static void mdt_rw_hpreq_fini(struct ptlrpc_request *req)
+{
+ mdt_rw_hpreq_check(req);
+}
+
+static struct ptlrpc_hpreq_ops mdt_hpreq_rw = {
+ .hpreq_lock_match = mdt_rw_hpreq_lock_match,
+ .hpreq_check = mdt_rw_hpreq_check,
+ .hpreq_fini = mdt_rw_hpreq_fini
+};
+
+/**
+ * Assign high priority operations to an IO request.
+ *
+ * Check if the incoming request is a candidate for
+ * high-priority processing. If it is, assign it a high
+ * priority operations table.
+ *
+ * \param[in] tsi target session environment for this request
+ */
+void mdt_hp_brw(struct tgt_session_info *tsi)
+{
+ struct niobuf_remote *rnb;
+ struct obd_ioobj *ioo;
+
+ ENTRY;
+
+ ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
+ LASSERT(ioo != NULL); /* must exist after request preprocessing */
+ if (ioo->ioo_bufcnt > 0) {
+ rnb = req_capsule_client_get(tsi->tsi_pill, &RMF_NIOBUF_REMOTE);
+ LASSERT(rnb != NULL); /* must exist after preprocessing */
+
+ /* no high priority if server lock is needed */
+ if (rnb->rnb_flags & OBD_BRW_SRVLOCK ||
+ (lustre_msg_get_flags(tgt_ses_req(tsi)->rq_reqmsg) &
+ MSG_REPLAY))
+ return;
+ }
+ tgt_ses_req(tsi)->rq_ops = &mdt_hpreq_rw;
+}
+
+static int mdt_punch_hpreq_lock_match(struct ptlrpc_request *req,
+ struct ldlm_lock *lock)
+{
+ struct tgt_session_info *tsi;
+ struct obdo *oa;
+
+ ENTRY;
+
+ /* Don't use tgt_ses_info() to get session info, because lock_match()
+ * can be called while request has no processing thread yet. */
+ tsi = lu_context_key_get(&req->rq_session, &tgt_session_key);
+
+ /*
+ * Use LASSERT below because malformed RPCs should have
+ * been filtered out in tgt_hpreq_handler().
+ */
+ LASSERT(tsi->tsi_ost_body != NULL);
+ if (tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLHANDLE &&
+ tsi->tsi_ost_body->oa.o_handle.cookie == lock->l_handle.h_cookie)
+ RETURN(1);
+
+ oa = &tsi->tsi_ost_body->oa;
+
+ LASSERT(lock->l_resource != NULL);
+ if (!fid_res_name_eq(&oa->o_oi.oi_fid, &lock->l_resource->lr_name))
+ RETURN(0);
+
+ if (!(lock->l_granted_mode & LCK_PW))
+ RETURN(0);
+
+ RETURN(1);
+}
+
+/**
+ * Implementation of ptlrpc_hpreq_ops::hpreq_lock_check for OST_PUNCH request.
+ *
+ * High-priority queue request check for whether the given punch request
+ * (\a req) is blocking an LDLM lock cancel. Also checks whether the request is
+ * covered by an LDLM lock.
+ *
+
+ *
+ * \param[in] req the incoming request
+ *
+ * \retval 1 if \a req is blocking an LDLM lock cancel
+ * \retval 0 if it is not
+ * \retval -ESTALE if lock is not found
+ */
+static int mdt_punch_hpreq_check(struct ptlrpc_request *req)
+{
+ struct tgt_session_info *tsi;
+ struct obdo *oa;
+ struct ldlm_prolong_args pa = { 0 };
+
+ ENTRY;
+
+ /* Don't use tgt_ses_info() to get session info, because lock_match()
+ * can be called while request has no processing thread yet. */
+ tsi = lu_context_key_get(&req->rq_session, &tgt_session_key);
+ LASSERT(tsi != NULL);
+ oa = &tsi->tsi_ost_body->oa;
+
+ LASSERT(!(oa->o_valid & OBD_MD_FLFLAGS &&
+ oa->o_flags & OBD_FL_SRVLOCK));
+
+ pa.lpa_mode = LCK_PW;
+
+ CDEBUG(D_DLMTRACE, "%s: refresh DOM lock for "DFID"\n",
+ tgt_name(tsi->tsi_tgt), PFID(&tsi->tsi_fid));
+
+ mdt_prolong_dom_lock(tsi, &pa);
+
+
+ if (pa.lpa_blocks_cnt > 0) {
+ CDEBUG(D_DLMTRACE,
+ "%s: refreshed %u locks timeout for req %p.\n",
+ tgt_name(tsi->tsi_tgt), pa.lpa_blocks_cnt, req);
+ RETURN(1);
+ }
+
+ RETURN(pa.lpa_locks_cnt > 0 ? 0 : -ESTALE);
+}
+
+/**
+ * Implementation of ptlrpc_hpreq_ops::hpreq_lock_fini for OST_PUNCH request.
+ *
+ * Called after the request has been handled. It refreshes lock timeout again
+ * so that client has more time to send lock cancel RPC.
+ *
+ * \param[in] req request which is being processed.
+ */
+static void mdt_punch_hpreq_fini(struct ptlrpc_request *req)
+{
+ mdt_punch_hpreq_check(req);
+}
+
+static struct ptlrpc_hpreq_ops mdt_hpreq_punch = {
+ .hpreq_lock_match = mdt_punch_hpreq_lock_match,
+ .hpreq_check = mdt_punch_hpreq_check,
+ .hpreq_fini = mdt_punch_hpreq_fini
+};
+
+void mdt_hp_punch(struct tgt_session_info *tsi)
+{
+ LASSERT(tsi->tsi_ost_body != NULL); /* must exists if we are here */
+ /* no high-priority if server lock is needed */
+ if ((tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLFLAGS &&
+ tsi->tsi_ost_body->oa.o_flags & OBD_FL_SRVLOCK) ||
+ tgt_conn_flags(tsi) & OBD_CONNECT_MDS ||
+ lustre_msg_get_flags(tgt_ses_req(tsi)->rq_reqmsg) & MSG_REPLAY)
+ return;
+ tgt_ses_req(tsi)->rq_ops = &mdt_hpreq_punch;
+}
+
static int mdt_preprw_read(const struct lu_env *env, struct obd_export *exp,
struct mdt_device *mdt, struct mdt_object *mo,
struct lu_attr *la, int niocount,
lu_object_put(tsi->tsi_env, &mo->mot_obj);
out_unlock:
if (srvlock)
- mdt_save_lock(info, &lh, LCK_PW, rc);
+ tgt_extent_unlock(&lh, LCK_PW);
out:
mdt_thread_info_fini(info);
return rc;
/* There can be only one write lock covering data, try to match it. */
policy.l_inodebits.bits = MDS_INODELOCK_DOM;
- mode = ldlm_lock_match(ns, LDLM_FL_BLOCK_GRANTED | LDLM_FL_TEST_LOCK,
+ mode = ldlm_lock_match(ns, LDLM_FL_TEST_LOCK,
&res->lr_name, LDLM_IBITS, &policy,
LCK_PW, &lockh, 0);
git://git.whamcloud.com / fs / lustre-release.git / commitdiff