/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. */ /* * Data-Link Driver */ #include #include #include #include #include #include #include #include typedef void proto_reqfunc_t(dld_str_t *, mblk_t *); static proto_reqfunc_t proto_info_req, proto_attach_req, proto_detach_req, proto_bind_req, proto_unbind_req, proto_promiscon_req, proto_promiscoff_req, proto_enabmulti_req, proto_disabmulti_req, proto_physaddr_req, proto_setphysaddr_req, proto_udqos_req, proto_req, proto_capability_req, proto_notify_req, proto_passive_req; static void proto_capability_advertise(dld_str_t *, mblk_t *); static int dld_capab_poll_disable(dld_str_t *, dld_capab_poll_t *); static boolean_t check_mod_above(queue_t *, const char *); #define DL_ACK_PENDING(state) \ ((state) == DL_ATTACH_PENDING || \ (state) == DL_DETACH_PENDING || \ (state) == DL_BIND_PENDING || \ (state) == DL_UNBIND_PENDING) /* * Process a DLPI protocol message. * The primitives DL_BIND_REQ, DL_ENABMULTI_REQ, DL_PROMISCON_REQ, * DL_SET_PHYS_ADDR_REQ put the data link below our dld_str_t into an * 'active' state. The primitive DL_PASSIVE_REQ marks our dld_str_t * as 'passive' and forbids it from being subsequently made 'active' * by the above primitives. */ void dld_proto(dld_str_t *dsp, mblk_t *mp) { t_uscalar_t prim; if (MBLKL(mp) < sizeof (t_uscalar_t)) { freemsg(mp); return; } prim = ((union DL_primitives *)mp->b_rptr)->dl_primitive; switch (prim) { case DL_INFO_REQ: proto_info_req(dsp, mp); break; case DL_BIND_REQ: proto_bind_req(dsp, mp); break; case DL_UNBIND_REQ: proto_unbind_req(dsp, mp); break; case DL_UNITDATA_REQ: proto_unitdata_req(dsp, mp); break; case DL_UDQOS_REQ: proto_udqos_req(dsp, mp); break; case DL_ATTACH_REQ: proto_attach_req(dsp, mp); break; case DL_DETACH_REQ: proto_detach_req(dsp, mp); break; case DL_ENABMULTI_REQ: proto_enabmulti_req(dsp, mp); break; case DL_DISABMULTI_REQ: proto_disabmulti_req(dsp, mp); break; case DL_PROMISCON_REQ: proto_promiscon_req(dsp, mp); break; case DL_PROMISCOFF_REQ: proto_promiscoff_req(dsp, mp); break; case DL_PHYS_ADDR_REQ: proto_physaddr_req(dsp, mp); break; case DL_SET_PHYS_ADDR_REQ: proto_setphysaddr_req(dsp, mp); break; case DL_NOTIFY_REQ: proto_notify_req(dsp, mp); break; case DL_CAPABILITY_REQ: proto_capability_req(dsp, mp); break; case DL_PASSIVE_REQ: proto_passive_req(dsp, mp); break; default: proto_req(dsp, mp); break; } } #define NEG(x) -(x) typedef struct dl_info_ack_wrapper { dl_info_ack_t dl_info; uint8_t dl_addr[MAXMACADDRLEN + sizeof (uint16_t)]; uint8_t dl_brdcst_addr[MAXMACADDRLEN]; dl_qos_cl_range1_t dl_qos_range1; dl_qos_cl_sel1_t dl_qos_sel1; } dl_info_ack_wrapper_t; /* * DL_INFO_REQ */ static void proto_info_req(dld_str_t *dsp, mblk_t *mp) { dl_info_ack_wrapper_t *dlwp; dl_info_ack_t *dlp; dl_qos_cl_sel1_t *selp; dl_qos_cl_range1_t *rangep; uint8_t *addr; uint8_t *brdcst_addr; uint_t addr_length; uint_t sap_length; mac_info_t minfo; mac_info_t *minfop; queue_t *q = dsp->ds_wq; /* * Swap the request message for one large enough to contain the * wrapper structure defined above. */ if ((mp = mexchange(q, mp, sizeof (dl_info_ack_wrapper_t), M_PCPROTO, 0)) == NULL) return; bzero(mp->b_rptr, sizeof (dl_info_ack_wrapper_t)); dlwp = (dl_info_ack_wrapper_t *)mp->b_rptr; dlp = &(dlwp->dl_info); ASSERT(dlp == (dl_info_ack_t *)mp->b_rptr); dlp->dl_primitive = DL_INFO_ACK; /* * Set up the sub-structure pointers. */ addr = dlwp->dl_addr; brdcst_addr = dlwp->dl_brdcst_addr; rangep = &(dlwp->dl_qos_range1); selp = &(dlwp->dl_qos_sel1); /* * This driver supports only version 2 connectionless DLPI provider * nodes. */ dlp->dl_service_mode = DL_CLDLS; dlp->dl_version = DL_VERSION_2; /* * Set the style of the provider */ dlp->dl_provider_style = dsp->ds_style; ASSERT(dlp->dl_provider_style == DL_STYLE1 || dlp->dl_provider_style == DL_STYLE2); /* * Set the current DLPI state. */ dlp->dl_current_state = dsp->ds_dlstate; /* * Gratuitously set the media type. This is to deal with modules * that assume the media type is known prior to DL_ATTACH_REQ * being completed. */ dlp->dl_mac_type = DL_ETHER; /* * If the stream is not at least attached we try to retrieve the * mac_info using mac_info_get() */ if (dsp->ds_dlstate == DL_UNATTACHED || dsp->ds_dlstate == DL_ATTACH_PENDING || dsp->ds_dlstate == DL_DETACH_PENDING) { if (!mac_info_get(ddi_major_to_name(dsp->ds_major), &minfo)) { /* * Cannot find mac_info. giving up. */ goto done; } minfop = &minfo; } else { minfop = (mac_info_t *)dsp->ds_mip; /* We can only get the sdu if we're attached. */ mac_sdu_get(dsp->ds_mh, &dlp->dl_min_sdu, &dlp->dl_max_sdu); } /* * Set the media type (properly this time). */ if (dsp->ds_native) dlp->dl_mac_type = minfop->mi_nativemedia; else dlp->dl_mac_type = minfop->mi_media; /* * Set the DLSAP length. We only support 16 bit values and they * appear after the MAC address portion of DLSAP addresses. */ sap_length = sizeof (uint16_t); dlp->dl_sap_length = NEG(sap_length); addr_length = minfop->mi_addr_length; /* * Copy in the media broadcast address. */ if (minfop->mi_brdcst_addr != NULL) { dlp->dl_brdcst_addr_offset = (uintptr_t)brdcst_addr - (uintptr_t)dlp; bcopy(minfop->mi_brdcst_addr, brdcst_addr, addr_length); dlp->dl_brdcst_addr_length = addr_length; } /* Only VLAN links and links that have a normal tag mode support QOS. */ if ((dsp->ds_mch != NULL && mac_client_vid(dsp->ds_mch) != VLAN_ID_NONE) || (dsp->ds_dlp != NULL && dsp->ds_dlp->dl_tagmode == LINK_TAGMODE_NORMAL)) { dlp->dl_qos_range_offset = (uintptr_t)rangep - (uintptr_t)dlp; dlp->dl_qos_range_length = sizeof (dl_qos_cl_range1_t); rangep->dl_qos_type = DL_QOS_CL_RANGE1; rangep->dl_trans_delay.dl_target_value = DL_UNKNOWN; rangep->dl_trans_delay.dl_accept_value = DL_UNKNOWN; rangep->dl_protection.dl_min = DL_UNKNOWN; rangep->dl_protection.dl_max = DL_UNKNOWN; rangep->dl_residual_error = DL_UNKNOWN; /* * Specify the supported range of priorities. */ rangep->dl_priority.dl_min = 0; rangep->dl_priority.dl_max = (1 << VLAN_PRI_SIZE) - 1; dlp->dl_qos_offset = (uintptr_t)selp - (uintptr_t)dlp; dlp->dl_qos_length = sizeof (dl_qos_cl_sel1_t); selp->dl_qos_type = DL_QOS_CL_SEL1; selp->dl_trans_delay = DL_UNKNOWN; selp->dl_protection = DL_UNKNOWN; selp->dl_residual_error = DL_UNKNOWN; /* * Specify the current priority (which can be changed by * the DL_UDQOS_REQ primitive). */ selp->dl_priority = dsp->ds_pri; } dlp->dl_addr_length = addr_length + sizeof (uint16_t); if (dsp->ds_dlstate == DL_IDLE) { /* * The stream is bound. Therefore we can formulate a valid * DLSAP address. */ dlp->dl_addr_offset = (uintptr_t)addr - (uintptr_t)dlp; if (addr_length > 0) mac_unicast_primary_get(dsp->ds_mh, addr); *(uint16_t *)(addr + addr_length) = dsp->ds_sap; } done: IMPLY(dlp->dl_qos_offset != 0, dlp->dl_qos_length != 0); IMPLY(dlp->dl_qos_range_offset != 0, dlp->dl_qos_range_length != 0); IMPLY(dlp->dl_addr_offset != 0, dlp->dl_addr_length != 0); IMPLY(dlp->dl_brdcst_addr_offset != 0, dlp->dl_brdcst_addr_length != 0); qreply(q, mp); } /* * DL_ATTACH_REQ */ static void proto_attach_req(dld_str_t *dsp, mblk_t *mp) { dl_attach_req_t *dlp = (dl_attach_req_t *)mp->b_rptr; int err = 0; t_uscalar_t dl_err; queue_t *q = dsp->ds_wq; if (MBLKL(mp) < sizeof (dl_attach_req_t) || dlp->dl_ppa < 0 || dsp->ds_style == DL_STYLE1) { dl_err = DL_BADPRIM; goto failed; } if (dsp->ds_dlstate != DL_UNATTACHED) { dl_err = DL_OUTSTATE; goto failed; } dsp->ds_dlstate = DL_ATTACH_PENDING; err = dld_str_attach(dsp, dlp->dl_ppa); if (err != 0) { switch (err) { case ENOENT: dl_err = DL_BADPPA; err = 0; break; default: dl_err = DL_SYSERR; break; } dsp->ds_dlstate = DL_UNATTACHED; goto failed; } ASSERT(dsp->ds_dlstate == DL_UNBOUND); dlokack(q, mp, DL_ATTACH_REQ); return; failed: dlerrorack(q, mp, DL_ATTACH_REQ, dl_err, (t_uscalar_t)err); } /* * DL_DETACH_REQ */ static void proto_detach_req(dld_str_t *dsp, mblk_t *mp) { queue_t *q = dsp->ds_wq; t_uscalar_t dl_err; if (MBLKL(mp) < sizeof (dl_detach_req_t)) { dl_err = DL_BADPRIM; goto failed; } if (dsp->ds_dlstate != DL_UNBOUND) { dl_err = DL_OUTSTATE; goto failed; } if (dsp->ds_style == DL_STYLE1) { dl_err = DL_BADPRIM; goto failed; } ASSERT(dsp->ds_datathr_cnt == 0); dsp->ds_dlstate = DL_DETACH_PENDING; dld_str_detach(dsp); dlokack(dsp->ds_wq, mp, DL_DETACH_REQ); return; failed: dlerrorack(q, mp, DL_DETACH_REQ, dl_err, 0); } /* * DL_BIND_REQ */ static void proto_bind_req(dld_str_t *dsp, mblk_t *mp) { dl_bind_req_t *dlp = (dl_bind_req_t *)mp->b_rptr; int err = 0; uint8_t dlsap_addr[MAXMACADDRLEN + sizeof (uint16_t)]; uint_t dlsap_addr_length; t_uscalar_t dl_err; t_scalar_t sap; queue_t *q = dsp->ds_wq; mac_perim_handle_t mph; void *mdip; int32_t intr_cpu; if (MBLKL(mp) < sizeof (dl_bind_req_t)) { dl_err = DL_BADPRIM; goto failed; } if (dlp->dl_xidtest_flg != 0) { dl_err = DL_NOAUTO; goto failed; } if (dlp->dl_service_mode != DL_CLDLS) { dl_err = DL_UNSUPPORTED; goto failed; } if (dsp->ds_dlstate != DL_UNBOUND) { dl_err = DL_OUTSTATE; goto failed; } mac_perim_enter_by_mh(dsp->ds_mh, &mph); if ((err = dls_active_set(dsp)) != 0) { dl_err = DL_SYSERR; goto failed2; } dsp->ds_dlstate = DL_BIND_PENDING; /* * Set the receive callback. */ dls_rx_set(dsp, (dsp->ds_mode == DLD_RAW) ? dld_str_rx_raw : dld_str_rx_unitdata, dsp); /* * Bind the channel such that it can receive packets. */ sap = dlp->dl_sap; dsp->ds_nonip = !check_mod_above(dsp->ds_rq, "ip") && !check_mod_above(dsp->ds_rq, "arp"); err = dls_bind(dsp, sap); if (err != 0) { switch (err) { case EINVAL: dl_err = DL_BADADDR; err = 0; break; default: dl_err = DL_SYSERR; break; } dsp->ds_dlstate = DL_UNBOUND; dls_active_clear(dsp, B_FALSE); goto failed2; } intr_cpu = mac_client_intr_cpu(dsp->ds_mch); mdip = mac_get_devinfo(dsp->ds_mh); mac_perim_exit(mph); /* * We do this after we get out of the perim to avoid deadlocks * etc. since part of mac_client_retarget_intr is to walk the * device tree in order to find and retarget the interrupts. */ if (intr_cpu != -1) mac_client_set_intr_cpu(mdip, dsp->ds_mch, intr_cpu); /* * Copy in MAC address. */ dlsap_addr_length = dsp->ds_mip->mi_addr_length; mac_unicast_primary_get(dsp->ds_mh, dlsap_addr); /* * Copy in the SAP. */ *(uint16_t *)(dlsap_addr + dlsap_addr_length) = sap; dlsap_addr_length += sizeof (uint16_t); dsp->ds_dlstate = DL_IDLE; dlbindack(q, mp, sap, dlsap_addr, dlsap_addr_length, 0, 0); return; failed2: mac_perim_exit(mph); failed: dlerrorack(q, mp, DL_BIND_REQ, dl_err, (t_uscalar_t)err); } /* * DL_UNBIND_REQ */ static void proto_unbind_req(dld_str_t *dsp, mblk_t *mp) { queue_t *q = dsp->ds_wq; t_uscalar_t dl_err; mac_perim_handle_t mph; if (MBLKL(mp) < sizeof (dl_unbind_req_t)) { dl_err = DL_BADPRIM; goto failed; } if (dsp->ds_dlstate != DL_IDLE) { dl_err = DL_OUTSTATE; goto failed; } mutex_enter(&dsp->ds_lock); while (dsp->ds_datathr_cnt != 0) cv_wait(&dsp->ds_datathr_cv, &dsp->ds_lock); dsp->ds_dlstate = DL_UNBIND_PENDING; mutex_exit(&dsp->ds_lock); mac_perim_enter_by_mh(dsp->ds_mh, &mph); /* * Unbind the channel to stop packets being received. */ dls_unbind(dsp); /* * Disable polling mode, if it is enabled. */ (void) dld_capab_poll_disable(dsp, NULL); /* * Clear LSO flags. */ dsp->ds_lso = B_FALSE; dsp->ds_lso_max = 0; /* * Clear the receive callback. */ dls_rx_set(dsp, NULL, NULL); dsp->ds_direct = B_FALSE; /* * Set the mode back to the default (unitdata). */ dsp->ds_mode = DLD_UNITDATA; dsp->ds_dlstate = DL_UNBOUND; dls_active_clear(dsp, B_FALSE); mac_perim_exit(mph); dlokack(dsp->ds_wq, mp, DL_UNBIND_REQ); return; failed: dlerrorack(q, mp, DL_UNBIND_REQ, dl_err, 0); } /* * DL_PROMISCON_REQ */ static void proto_promiscon_req(dld_str_t *dsp, mblk_t *mp) { dl_promiscon_req_t *dlp = (dl_promiscon_req_t *)mp->b_rptr; int err = 0; t_uscalar_t dl_err; uint32_t promisc_saved; queue_t *q = dsp->ds_wq; mac_perim_handle_t mph; if (MBLKL(mp) < sizeof (dl_promiscon_req_t)) { dl_err = DL_BADPRIM; goto failed; } if (dsp->ds_dlstate == DL_UNATTACHED || DL_ACK_PENDING(dsp->ds_dlstate)) { dl_err = DL_OUTSTATE; goto failed; } promisc_saved = dsp->ds_promisc; switch (dlp->dl_level) { case DL_PROMISC_SAP: dsp->ds_promisc |= DLS_PROMISC_SAP; break; case DL_PROMISC_MULTI: dsp->ds_promisc |= DLS_PROMISC_MULTI; break; case DL_PROMISC_PHYS: dsp->ds_promisc |= DLS_PROMISC_PHYS; break; default: dl_err = DL_NOTSUPPORTED; goto failed; } mac_perim_enter_by_mh(dsp->ds_mh, &mph); if ((promisc_saved == 0) && (err = dls_active_set(dsp)) != 0) { dsp->ds_promisc = promisc_saved; dl_err = DL_SYSERR; goto failed2; } /* * Adjust channel promiscuity. */ err = dls_promisc(dsp, promisc_saved); if (err != 0) { dl_err = DL_SYSERR; dsp->ds_promisc = promisc_saved; if (promisc_saved == 0) dls_active_clear(dsp, B_FALSE); goto failed2; } mac_perim_exit(mph); dlokack(q, mp, DL_PROMISCON_REQ); return; failed2: mac_perim_exit(mph); failed: dlerrorack(q, mp, DL_PROMISCON_REQ, dl_err, (t_uscalar_t)err); } /* * DL_PROMISCOFF_REQ */ static void proto_promiscoff_req(dld_str_t *dsp, mblk_t *mp) { dl_promiscoff_req_t *dlp = (dl_promiscoff_req_t *)mp->b_rptr; int err = 0; t_uscalar_t dl_err; uint32_t promisc_saved; queue_t *q = dsp->ds_wq; mac_perim_handle_t mph; if (MBLKL(mp) < sizeof (dl_promiscoff_req_t)) { dl_err = DL_BADPRIM; goto failed; } if (dsp->ds_dlstate == DL_UNATTACHED || DL_ACK_PENDING(dsp->ds_dlstate)) { dl_err = DL_OUTSTATE; goto failed; } promisc_saved = dsp->ds_promisc; switch (dlp->dl_level) { case DL_PROMISC_SAP: if (!(dsp->ds_promisc & DLS_PROMISC_SAP)) { dl_err = DL_NOTENAB; goto failed; } dsp->ds_promisc &= ~DLS_PROMISC_SAP; break; case DL_PROMISC_MULTI: if (!(dsp->ds_promisc & DLS_PROMISC_MULTI)) { dl_err = DL_NOTENAB; goto failed; } dsp->ds_promisc &= ~DLS_PROMISC_MULTI; break; case DL_PROMISC_PHYS: if (!(dsp->ds_promisc & DLS_PROMISC_PHYS)) { dl_err = DL_NOTENAB; goto failed; } dsp->ds_promisc &= ~DLS_PROMISC_PHYS; break; default: dl_err = DL_NOTSUPPORTED; goto failed; } mac_perim_enter_by_mh(dsp->ds_mh, &mph); /* * Adjust channel promiscuity. */ err = dls_promisc(dsp, promisc_saved); if (err != 0) { mac_perim_exit(mph); dl_err = DL_SYSERR; goto failed; } if (dsp->ds_promisc == 0) dls_active_clear(dsp, B_FALSE); mac_perim_exit(mph); dlokack(q, mp, DL_PROMISCOFF_REQ); return; failed: dlerrorack(q, mp, DL_PROMISCOFF_REQ, dl_err, (t_uscalar_t)err); } /* * DL_ENABMULTI_REQ */ static void proto_enabmulti_req(dld_str_t *dsp, mblk_t *mp) { dl_enabmulti_req_t *dlp = (dl_enabmulti_req_t *)mp->b_rptr; int err = 0; t_uscalar_t dl_err; queue_t *q = dsp->ds_wq; mac_perim_handle_t mph; if (dsp->ds_dlstate == DL_UNATTACHED || DL_ACK_PENDING(dsp->ds_dlstate)) { dl_err = DL_OUTSTATE; goto failed; } if (MBLKL(mp) < sizeof (dl_enabmulti_req_t) || !MBLKIN(mp, dlp->dl_addr_offset, dlp->dl_addr_length) || dlp->dl_addr_length != dsp->ds_mip->mi_addr_length) { dl_err = DL_BADPRIM; goto failed; } mac_perim_enter_by_mh(dsp->ds_mh, &mph); if ((dsp->ds_dmap == NULL) && (err = dls_active_set(dsp)) != 0) { dl_err = DL_SYSERR; goto failed2; } err = dls_multicst_add(dsp, mp->b_rptr + dlp->dl_addr_offset); if (err != 0) { switch (err) { case EINVAL: dl_err = DL_BADADDR; err = 0; break; case ENOSPC: dl_err = DL_TOOMANY; err = 0; break; default: dl_err = DL_SYSERR; break; } if (dsp->ds_dmap == NULL) dls_active_clear(dsp, B_FALSE); goto failed2; } mac_perim_exit(mph); dlokack(q, mp, DL_ENABMULTI_REQ); return; failed2: mac_perim_exit(mph); failed: dlerrorack(q, mp, DL_ENABMULTI_REQ, dl_err, (t_uscalar_t)err); } /* * DL_DISABMULTI_REQ */ static void proto_disabmulti_req(dld_str_t *dsp, mblk_t *mp) { dl_disabmulti_req_t *dlp = (dl_disabmulti_req_t *)mp->b_rptr; int err = 0; t_uscalar_t dl_err; queue_t *q = dsp->ds_wq; mac_perim_handle_t mph; if (dsp->ds_dlstate == DL_UNATTACHED || DL_ACK_PENDING(dsp->ds_dlstate)) { dl_err = DL_OUTSTATE; goto failed; } if (MBLKL(mp) < sizeof (dl_disabmulti_req_t) || !MBLKIN(mp, dlp->dl_addr_offset, dlp->dl_addr_length) || dlp->dl_addr_length != dsp->ds_mip->mi_addr_length) { dl_err = DL_BADPRIM; goto failed; } mac_perim_enter_by_mh(dsp->ds_mh, &mph); err = dls_multicst_remove(dsp, mp->b_rptr + dlp->dl_addr_offset); if ((err == 0) && (dsp->ds_dmap == NULL)) dls_active_clear(dsp, B_FALSE); mac_perim_exit(mph); if (err != 0) { switch (err) { case EINVAL: dl_err = DL_BADADDR; err = 0; break; case ENOENT: dl_err = DL_NOTENAB; err = 0; break; default: dl_err = DL_SYSERR; break; } goto failed; } dlokack(q, mp, DL_DISABMULTI_REQ); return; failed: dlerrorack(q, mp, DL_DISABMULTI_REQ, dl_err, (t_uscalar_t)err); } /* * DL_PHYS_ADDR_REQ */ static void proto_physaddr_req(dld_str_t *dsp, mblk_t *mp) { dl_phys_addr_req_t *dlp = (dl_phys_addr_req_t *)mp->b_rptr; queue_t *q = dsp->ds_wq; t_uscalar_t dl_err = 0; char *addr = NULL; uint_t addr_length; if (MBLKL(mp) < sizeof (dl_phys_addr_req_t)) { dl_err = DL_BADPRIM; goto done; } if (dsp->ds_dlstate == DL_UNATTACHED || DL_ACK_PENDING(dsp->ds_dlstate)) { dl_err = DL_OUTSTATE; goto done; } addr_length = dsp->ds_mip->mi_addr_length; if (addr_length > 0) { addr = kmem_alloc(addr_length, KM_SLEEP); switch (dlp->dl_addr_type) { case DL_CURR_PHYS_ADDR: mac_unicast_primary_get(dsp->ds_mh, (uint8_t *)addr); break; case DL_FACT_PHYS_ADDR: bcopy(dsp->ds_mip->mi_unicst_addr, addr, addr_length); break; case DL_CURR_DEST_ADDR: if (!mac_dst_get(dsp->ds_mh, (uint8_t *)addr)) dl_err = DL_NOTSUPPORTED; break; default: dl_err = DL_UNSUPPORTED; } } done: if (dl_err == 0) dlphysaddrack(q, mp, addr, (t_uscalar_t)addr_length); else dlerrorack(q, mp, DL_PHYS_ADDR_REQ, dl_err, 0); if (addr != NULL) kmem_free(addr, addr_length); } /* * DL_SET_PHYS_ADDR_REQ */ static void proto_setphysaddr_req(dld_str_t *dsp, mblk_t *mp) { dl_set_phys_addr_req_t *dlp = (dl_set_phys_addr_req_t *)mp->b_rptr; int err = 0; t_uscalar_t dl_err; queue_t *q = dsp->ds_wq; mac_perim_handle_t mph; if (dsp->ds_dlstate == DL_UNATTACHED || DL_ACK_PENDING(dsp->ds_dlstate)) { dl_err = DL_OUTSTATE; goto failed; } if (MBLKL(mp) < sizeof (dl_set_phys_addr_req_t) || !MBLKIN(mp, dlp->dl_addr_offset, dlp->dl_addr_length) || dlp->dl_addr_length != dsp->ds_mip->mi_addr_length) { dl_err = DL_BADPRIM; goto failed; } mac_perim_enter_by_mh(dsp->ds_mh, &mph); if ((err = dls_active_set(dsp)) != 0) { dl_err = DL_SYSERR; goto failed2; } /* * If mac-nospoof is enabled and the link is owned by a * non-global zone, changing the mac address is not allowed. */ if (dsp->ds_dlp->dl_zid != GLOBAL_ZONEID && mac_protect_enabled(dsp->ds_mch, MPT_MACNOSPOOF)) { dls_active_clear(dsp, B_FALSE); err = EACCES; goto failed2; } err = mac_unicast_primary_set(dsp->ds_mh, mp->b_rptr + dlp->dl_addr_offset); if (err != 0) { switch (err) { case EINVAL: dl_err = DL_BADADDR; err = 0; break; default: dl_err = DL_SYSERR; break; } dls_active_clear(dsp, B_FALSE); goto failed2; } mac_perim_exit(mph); dlokack(q, mp, DL_SET_PHYS_ADDR_REQ); return; failed2: mac_perim_exit(mph); failed: dlerrorack(q, mp, DL_SET_PHYS_ADDR_REQ, dl_err, (t_uscalar_t)err); } /* * DL_UDQOS_REQ */ static void proto_udqos_req(dld_str_t *dsp, mblk_t *mp) { dl_udqos_req_t *dlp = (dl_udqos_req_t *)mp->b_rptr; dl_qos_cl_sel1_t *selp; int off, len; t_uscalar_t dl_err; queue_t *q = dsp->ds_wq; off = dlp->dl_qos_offset; len = dlp->dl_qos_length; if (MBLKL(mp) < sizeof (dl_udqos_req_t) || !MBLKIN(mp, off, len)) { dl_err = DL_BADPRIM; goto failed; } selp = (dl_qos_cl_sel1_t *)(mp->b_rptr + off); if (selp->dl_qos_type != DL_QOS_CL_SEL1) { dl_err = DL_BADQOSTYPE; goto failed; } if (selp->dl_priority > (1 << VLAN_PRI_SIZE) - 1 || selp->dl_priority < 0) { dl_err = DL_BADQOSPARAM; goto failed; } dsp->ds_pri = selp->dl_priority; dlokack(q, mp, DL_UDQOS_REQ); return; failed: dlerrorack(q, mp, DL_UDQOS_REQ, dl_err, 0); } static boolean_t check_mod_above(queue_t *q, const char *mod) { queue_t *next_q; boolean_t ret = B_TRUE; claimstr(q); next_q = q->q_next; if (strcmp(next_q->q_qinfo->qi_minfo->mi_idname, mod) != 0) ret = B_FALSE; releasestr(q); return (ret); } /* * DL_CAPABILITY_REQ */ static void proto_capability_req(dld_str_t *dsp, mblk_t *mp) { dl_capability_req_t *dlp = (dl_capability_req_t *)mp->b_rptr; dl_capability_sub_t *sp; size_t size, len; offset_t off, end; t_uscalar_t dl_err; queue_t *q = dsp->ds_wq; if (MBLKL(mp) < sizeof (dl_capability_req_t)) { dl_err = DL_BADPRIM; goto failed; } if (dsp->ds_dlstate == DL_UNATTACHED || DL_ACK_PENDING(dsp->ds_dlstate)) { dl_err = DL_OUTSTATE; goto failed; } /* * This request is overloaded. If there are no requested capabilities * then we just want to acknowledge with all the capabilities we * support. Otherwise we enable the set of capabilities requested. */ if (dlp->dl_sub_length == 0) { proto_capability_advertise(dsp, mp); return; } if (!MBLKIN(mp, dlp->dl_sub_offset, dlp->dl_sub_length)) { dl_err = DL_BADPRIM; goto failed; } dlp->dl_primitive = DL_CAPABILITY_ACK; off = dlp->dl_sub_offset; len = dlp->dl_sub_length; /* * Walk the list of capabilities to be enabled. */ for (end = off + len; off < end; ) { sp = (dl_capability_sub_t *)(mp->b_rptr + off); size = sizeof (dl_capability_sub_t) + sp->dl_length; if (off + size > end || !IS_P2ALIGNED(off, sizeof (uint32_t))) { dl_err = DL_BADPRIM; goto failed; } switch (sp->dl_cap) { /* * TCP/IP checksum offload to hardware. */ case DL_CAPAB_HCKSUM: { dl_capab_hcksum_t *hcksump; dl_capab_hcksum_t hcksum; hcksump = (dl_capab_hcksum_t *)&sp[1]; /* * Copy for alignment. */ bcopy(hcksump, &hcksum, sizeof (dl_capab_hcksum_t)); dlcapabsetqid(&(hcksum.hcksum_mid), dsp->ds_rq); bcopy(&hcksum, hcksump, sizeof (dl_capab_hcksum_t)); break; } case DL_CAPAB_DLD: { dl_capab_dld_t *dldp; dl_capab_dld_t dld; dldp = (dl_capab_dld_t *)&sp[1]; /* * Copy for alignment. */ bcopy(dldp, &dld, sizeof (dl_capab_dld_t)); dlcapabsetqid(&(dld.dld_mid), dsp->ds_rq); bcopy(&dld, dldp, sizeof (dl_capab_dld_t)); break; } default: break; } off += size; } qreply(q, mp); return; failed: dlerrorack(q, mp, DL_CAPABILITY_REQ, dl_err, 0); } /* * DL_NOTIFY_REQ */ static void proto_notify_req(dld_str_t *dsp, mblk_t *mp) { dl_notify_req_t *dlp = (dl_notify_req_t *)mp->b_rptr; t_uscalar_t dl_err; queue_t *q = dsp->ds_wq; uint_t note = DL_NOTE_PROMISC_ON_PHYS | DL_NOTE_PROMISC_OFF_PHYS | DL_NOTE_PHYS_ADDR | DL_NOTE_LINK_UP | DL_NOTE_LINK_DOWN | DL_NOTE_CAPAB_RENEG | DL_NOTE_FASTPATH_FLUSH | DL_NOTE_SPEED | DL_NOTE_SDU_SIZE| DL_NOTE_SDU_SIZE2| DL_NOTE_ALLOWED_IPS; if (MBLKL(mp) < sizeof (dl_notify_req_t)) { dl_err = DL_BADPRIM; goto failed; } if (dsp->ds_dlstate == DL_UNATTACHED || DL_ACK_PENDING(dsp->ds_dlstate)) { dl_err = DL_OUTSTATE; goto failed; } note &= ~(mac_no_notification(dsp->ds_mh)); /* * Cache the notifications that are being enabled. */ dsp->ds_notifications = dlp->dl_notifications & note; /* * The ACK carries all notifications regardless of which set is * being enabled. */ dlnotifyack(q, mp, note); /* * Generate DL_NOTIFY_IND messages for each enabled notification. */ if (dsp->ds_notifications != 0) { dld_str_notify_ind(dsp); } return; failed: dlerrorack(q, mp, DL_NOTIFY_REQ, dl_err, 0); } /* * DL_UINTDATA_REQ */ void proto_unitdata_req(dld_str_t *dsp, mblk_t *mp) { queue_t *q = dsp->ds_wq; dl_unitdata_req_t *dlp = (dl_unitdata_req_t *)mp->b_rptr; off_t off; size_t len, size; const uint8_t *addr; uint16_t sap; uint_t addr_length; mblk_t *bp, *payload; uint32_t start, stuff, end, value, flags; t_uscalar_t dl_err; uint_t max_sdu; if (MBLKL(mp) < sizeof (dl_unitdata_req_t) || mp->b_cont == NULL) { dlerrorack(q, mp, DL_UNITDATA_REQ, DL_BADPRIM, 0); return; } mutex_enter(&dsp->ds_lock); if (dsp->ds_dlstate != DL_IDLE) { mutex_exit(&dsp->ds_lock); dlerrorack(q, mp, DL_UNITDATA_REQ, DL_OUTSTATE, 0); return; } DLD_DATATHR_INC(dsp); mutex_exit(&dsp->ds_lock); addr_length = dsp->ds_mip->mi_addr_length; off = dlp->dl_dest_addr_offset; len = dlp->dl_dest_addr_length; if (!MBLKIN(mp, off, len) || !IS_P2ALIGNED(off, sizeof (uint16_t))) { dl_err = DL_BADPRIM; goto failed; } if (len != addr_length + sizeof (uint16_t)) { dl_err = DL_BADADDR; goto failed; } addr = mp->b_rptr + off; sap = *(uint16_t *)(mp->b_rptr + off + addr_length); /* * Check the length of the packet and the block types. */ size = 0; payload = mp->b_cont; for (bp = payload; bp != NULL; bp = bp->b_cont) { if (DB_TYPE(bp) != M_DATA) goto baddata; size += MBLKL(bp); } mac_sdu_get(dsp->ds_mh, NULL, &max_sdu); if (size > max_sdu) goto baddata; /* * Build a packet header. */ if ((bp = dls_header(dsp, addr, sap, dlp->dl_priority.dl_max, &payload)) == NULL) { dl_err = DL_BADADDR; goto failed; } /* * We no longer need the M_PROTO header, so free it. */ freeb(mp); /* * Transfer the checksum offload information if it is present. */ hcksum_retrieve(payload, NULL, NULL, &start, &stuff, &end, &value, &flags); (void) hcksum_assoc(bp, NULL, NULL, start, stuff, end, value, flags, 0); /* * Link the payload onto the new header. */ ASSERT(bp->b_cont == NULL); bp->b_cont = payload; /* * No lock can be held across modules and putnext()'s, * which can happen here with the call from DLD_TX(). */ if (DLD_TX(dsp, bp, 0, 0) != NULL) { /* flow-controlled */ DLD_SETQFULL(dsp); } DLD_DATATHR_DCR(dsp); return; failed: dlerrorack(q, mp, DL_UNITDATA_REQ, dl_err, 0); DLD_DATATHR_DCR(dsp); return; baddata: dluderrorind(q, mp, (void *)addr, len, DL_BADDATA, 0); DLD_DATATHR_DCR(dsp); } /* * DL_PASSIVE_REQ */ static void proto_passive_req(dld_str_t *dsp, mblk_t *mp) { t_uscalar_t dl_err; /* * If we've already become active by issuing an active primitive, * then it's too late to try to become passive. */ if (dsp->ds_passivestate == DLD_ACTIVE) { dl_err = DL_OUTSTATE; goto failed; } if (MBLKL(mp) < sizeof (dl_passive_req_t)) { dl_err = DL_BADPRIM; goto failed; } dsp->ds_passivestate = DLD_PASSIVE; dlokack(dsp->ds_wq, mp, DL_PASSIVE_REQ); return; failed: dlerrorack(dsp->ds_wq, mp, DL_PASSIVE_REQ, dl_err, 0); } /* * Catch-all handler. */ static void proto_req(dld_str_t *dsp, mblk_t *mp) { union DL_primitives *dlp = (union DL_primitives *)mp->b_rptr; dlerrorack(dsp->ds_wq, mp, dlp->dl_primitive, DL_UNSUPPORTED, 0); } static int dld_capab_perim(dld_str_t *dsp, void *data, uint_t flags) { switch (flags) { case DLD_ENABLE: mac_perim_enter_by_mh(dsp->ds_mh, (mac_perim_handle_t *)data); return (0); case DLD_DISABLE: mac_perim_exit((mac_perim_handle_t)data); return (0); case DLD_QUERY: return (mac_perim_held(dsp->ds_mh)); } return (0); } static int dld_capab_direct(dld_str_t *dsp, void *data, uint_t flags) { dld_capab_direct_t *direct = data; ASSERT(MAC_PERIM_HELD(dsp->ds_mh)); switch (flags) { case DLD_ENABLE: dls_rx_set(dsp, (dls_rx_t)direct->di_rx_cf, direct->di_rx_ch); direct->di_tx_df = (uintptr_t)str_mdata_fastpath_put; direct->di_tx_dh = dsp; direct->di_tx_cb_df = (uintptr_t)mac_client_tx_notify; direct->di_tx_cb_dh = dsp->ds_mch; direct->di_tx_fctl_df = (uintptr_t)mac_tx_is_flow_blocked; direct->di_tx_fctl_dh = dsp->ds_mch; dsp->ds_direct = B_TRUE; return (0); case DLD_DISABLE: dls_rx_set(dsp, (dsp->ds_mode == DLD_FASTPATH) ? dld_str_rx_fastpath : dld_str_rx_unitdata, (void *)dsp); dsp->ds_direct = B_FALSE; return (0); } return (ENOTSUP); } /* * dld_capab_poll_enable() * * This function is misnamed. All polling and fanouts are run out of the * lower mac (in case of VNIC and the only mac in case of NICs). The * availability of Rx ring and promiscous mode is all taken care between * the soft ring set (mac_srs), the Rx ring, and S/W classifier. Any * fanout necessary is done by the soft rings that are part of the * mac_srs (by default mac_srs sends the packets up via a TCP and * non TCP soft ring). * * The mac_srs (or its associated soft rings) always store the ill_rx_ring * (the cookie returned when they registered with IP during plumb) as their * 2nd argument which is passed up as mac_resource_handle_t. The upcall * function and 1st argument is what the caller registered when they * called mac_rx_classify_flow_add() to register the flow. For VNIC, * the function is vnic_rx and argument is vnic_t. For regular NIC * case, it mac_rx_default and mac_handle_t. As explained above, the * mac_srs (or its soft ring) will add the ill_rx_ring (mac_resource_handle_t) * from its stored 2nd argument. */ static int dld_capab_poll_enable(dld_str_t *dsp, dld_capab_poll_t *poll) { if (dsp->ds_polling) return (EINVAL); if ((dld_opt & DLD_OPT_NO_POLL) != 0 || dsp->ds_mode == DLD_RAW) return (ENOTSUP); /* * Enable client polling if and only if DLS bypass is possible. * Special cases like VLANs need DLS processing in the Rx data path. * In such a case we can neither allow the client (IP) to directly * poll the softring (since DLS processing hasn't been done) nor can * we allow DLS bypass. */ if (!mac_rx_bypass_set(dsp->ds_mch, dsp->ds_rx, dsp->ds_rx_arg)) return (ENOTSUP); /* * Register soft ring resources. This will come in handy later if * the user decides to modify CPU bindings to use more CPUs for the * device in which case we will switch to fanout using soft rings. */ mac_resource_set_common(dsp->ds_mch, (mac_resource_add_t)poll->poll_ring_add_cf, (mac_resource_remove_t)poll->poll_ring_remove_cf, (mac_resource_quiesce_t)poll->poll_ring_quiesce_cf, (mac_resource_restart_t)poll->poll_ring_restart_cf, (mac_resource_bind_t)poll->poll_ring_bind_cf, poll->poll_ring_ch); mac_client_poll_enable(dsp->ds_mch); dsp->ds_polling = B_TRUE; return (0); } /* ARGSUSED */ static int dld_capab_poll_disable(dld_str_t *dsp, dld_capab_poll_t *poll) { if (!dsp->ds_polling) return (EINVAL); mac_client_poll_disable(dsp->ds_mch); mac_resource_set(dsp->ds_mch, NULL, NULL); dsp->ds_polling = B_FALSE; return (0); } static int dld_capab_poll(dld_str_t *dsp, void *data, uint_t flags) { dld_capab_poll_t *poll = data; ASSERT(MAC_PERIM_HELD(dsp->ds_mh)); switch (flags) { case DLD_ENABLE: return (dld_capab_poll_enable(dsp, poll)); case DLD_DISABLE: return (dld_capab_poll_disable(dsp, poll)); } return (ENOTSUP); } static int dld_capab_lso(dld_str_t *dsp, void *data, uint_t flags) { dld_capab_lso_t *lso = data; ASSERT(MAC_PERIM_HELD(dsp->ds_mh)); switch (flags) { case DLD_ENABLE: { mac_capab_lso_t mac_lso; /* * Check if LSO is supported on this MAC & enable LSO * accordingly. */ if (mac_capab_get(dsp->ds_mh, MAC_CAPAB_LSO, &mac_lso)) { lso->lso_max = mac_lso.lso_basic_tcp_ipv4.lso_max; lso->lso_flags = 0; /* translate the flag for mac clients */ if ((mac_lso.lso_flags & LSO_TX_BASIC_TCP_IPV4) != 0) lso->lso_flags |= DLD_LSO_BASIC_TCP_IPV4; dsp->ds_lso = B_TRUE; dsp->ds_lso_max = lso->lso_max; } else { dsp->ds_lso = B_FALSE; dsp->ds_lso_max = 0; return (ENOTSUP); } return (0); } case DLD_DISABLE: { dsp->ds_lso = B_FALSE; dsp->ds_lso_max = 0; return (0); } } return (ENOTSUP); } static int dld_capab(dld_str_t *dsp, uint_t type, void *data, uint_t flags) { int err; /* * Don't enable direct callback capabilities unless the caller is * the IP client. When a module is inserted in a stream (_I_INSERT) * the stack initiates capability disable, but due to races, the * module insertion may complete before the capability disable * completes. So we limit the check to DLD_ENABLE case. */ if ((flags == DLD_ENABLE && type != DLD_CAPAB_PERIM) && (dsp->ds_sap != ETHERTYPE_IP || !check_mod_above(dsp->ds_rq, "ip"))) { return (ENOTSUP); } switch (type) { case DLD_CAPAB_DIRECT: err = dld_capab_direct(dsp, data, flags); break; case DLD_CAPAB_POLL: err = dld_capab_poll(dsp, data, flags); break; case DLD_CAPAB_PERIM: err = dld_capab_perim(dsp, data, flags); break; case DLD_CAPAB_LSO: err = dld_capab_lso(dsp, data, flags); break; default: err = ENOTSUP; break; } return (err); } /* * DL_CAPABILITY_ACK/DL_ERROR_ACK */ static void proto_capability_advertise(dld_str_t *dsp, mblk_t *mp) { dl_capability_ack_t *dlap; dl_capability_sub_t *dlsp; size_t subsize; dl_capab_dld_t dld; dl_capab_hcksum_t hcksum; dl_capab_zerocopy_t zcopy; dl_capab_vrrp_t vrrp; mac_capab_vrrp_t vrrp_capab; uint8_t *ptr; queue_t *q = dsp->ds_wq; mblk_t *mp1; boolean_t hcksum_capable = B_FALSE; boolean_t zcopy_capable = B_FALSE; boolean_t dld_capable = B_FALSE; boolean_t vrrp_capable = B_FALSE; /* * Initially assume no capabilities. */ subsize = 0; /* * Check if checksum offload is supported on this MAC. */ bzero(&hcksum, sizeof (dl_capab_hcksum_t)); if (mac_capab_get(dsp->ds_mh, MAC_CAPAB_HCKSUM, &hcksum.hcksum_txflags)) { if (hcksum.hcksum_txflags != 0) { hcksum_capable = B_TRUE; subsize += sizeof (dl_capability_sub_t) + sizeof (dl_capab_hcksum_t); } } /* * Check if zerocopy is supported on this interface. * If advertising DL_CAPAB_ZEROCOPY has not been explicitly disabled * then reserve space for that capability. */ if (!mac_capab_get(dsp->ds_mh, MAC_CAPAB_NO_ZCOPY, NULL) && !(dld_opt & DLD_OPT_NO_ZEROCOPY)) { zcopy_capable = B_TRUE; subsize += sizeof (dl_capability_sub_t) + sizeof (dl_capab_zerocopy_t); } /* * Direct capability negotiation interface between IP and DLD */ if (dsp->ds_sap == ETHERTYPE_IP && check_mod_above(dsp->ds_rq, "ip")) { dld_capable = B_TRUE; subsize += sizeof (dl_capability_sub_t) + sizeof (dl_capab_dld_t); } /* * Check if vrrp is supported on this interface. If so, reserve * space for that capability. */ if (mac_capab_get(dsp->ds_mh, MAC_CAPAB_VRRP, &vrrp_capab)) { vrrp_capable = B_TRUE; subsize += sizeof (dl_capability_sub_t) + sizeof (dl_capab_vrrp_t); } /* * If there are no capabilities to advertise or if we * can't allocate a response, send a DL_ERROR_ACK. */ if ((mp1 = reallocb(mp, sizeof (dl_capability_ack_t) + subsize, 0)) == NULL) { dlerrorack(q, mp, DL_CAPABILITY_REQ, DL_NOTSUPPORTED, 0); return; } mp = mp1; DB_TYPE(mp) = M_PROTO; mp->b_wptr = mp->b_rptr + sizeof (dl_capability_ack_t) + subsize; bzero(mp->b_rptr, MBLKL(mp)); dlap = (dl_capability_ack_t *)mp->b_rptr; dlap->dl_primitive = DL_CAPABILITY_ACK; dlap->dl_sub_offset = sizeof (dl_capability_ack_t); dlap->dl_sub_length = subsize; ptr = (uint8_t *)&dlap[1]; /* * TCP/IP checksum offload. */ if (hcksum_capable) { dlsp = (dl_capability_sub_t *)ptr; dlsp->dl_cap = DL_CAPAB_HCKSUM; dlsp->dl_length = sizeof (dl_capab_hcksum_t); ptr += sizeof (dl_capability_sub_t); hcksum.hcksum_version = HCKSUM_VERSION_1; dlcapabsetqid(&(hcksum.hcksum_mid), dsp->ds_rq); bcopy(&hcksum, ptr, sizeof (dl_capab_hcksum_t)); ptr += sizeof (dl_capab_hcksum_t); } /* * Zero copy */ if (zcopy_capable) { dlsp = (dl_capability_sub_t *)ptr; dlsp->dl_cap = DL_CAPAB_ZEROCOPY; dlsp->dl_length = sizeof (dl_capab_zerocopy_t); ptr += sizeof (dl_capability_sub_t); bzero(&zcopy, sizeof (dl_capab_zerocopy_t)); zcopy.zerocopy_version = ZEROCOPY_VERSION_1; zcopy.zerocopy_flags = DL_CAPAB_VMSAFE_MEM; dlcapabsetqid(&(zcopy.zerocopy_mid), dsp->ds_rq); bcopy(&zcopy, ptr, sizeof (dl_capab_zerocopy_t)); ptr += sizeof (dl_capab_zerocopy_t); } /* * VRRP capability negotiation */ if (vrrp_capable) { dlsp = (dl_capability_sub_t *)ptr; dlsp->dl_cap = DL_CAPAB_VRRP; dlsp->dl_length = sizeof (dl_capab_vrrp_t); ptr += sizeof (dl_capability_sub_t); bzero(&vrrp, sizeof (dl_capab_vrrp_t)); vrrp.vrrp_af = vrrp_capab.mcv_af; bcopy(&vrrp, ptr, sizeof (dl_capab_vrrp_t)); ptr += sizeof (dl_capab_vrrp_t); } /* * Direct capability negotiation interface between IP and DLD. * Refer to dld.h for details. */ if (dld_capable) { dlsp = (dl_capability_sub_t *)ptr; dlsp->dl_cap = DL_CAPAB_DLD; dlsp->dl_length = sizeof (dl_capab_dld_t); ptr += sizeof (dl_capability_sub_t); bzero(&dld, sizeof (dl_capab_dld_t)); dld.dld_version = DLD_CURRENT_VERSION; dld.dld_capab = (uintptr_t)dld_capab; dld.dld_capab_handle = (uintptr_t)dsp; dlcapabsetqid(&(dld.dld_mid), dsp->ds_rq); bcopy(&dld, ptr, sizeof (dl_capab_dld_t)); ptr += sizeof (dl_capab_dld_t); } ASSERT(ptr == mp->b_rptr + sizeof (dl_capability_ack_t) + subsize); qreply(q, mp); } /* * Disable any enabled capabilities. */ void dld_capabilities_disable(dld_str_t *dsp) { if (dsp->ds_polling) (void) dld_capab_poll_disable(dsp, NULL); }