1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2002-2003 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/types.h> 30 #include <sys/stream.h> 31 #include <sys/dlpi.h> 32 #include <sys/strsun.h> 33 #include <netinet/in.h> 34 #include <netinet/ip6.h> 35 #include <inet/common.h> 36 #include <inet/ip.h> 37 #include <inet/ip6.h> 38 #include <inet/ip_if.h> 39 #include <ipp/dlcosmk/dlcosmk_impl.h> 40 41 /* Module to mark the 802.1d user priority field for a given packet */ 42 43 /* Debug level */ 44 int dlcosmk_debug = 0; 45 46 /* 47 * Given a packet, this module marks the mblk with the appropriate b_band or 48 * dl_max value so that the VLAN driver marks the outgoing frame with the 49 * configured 802.1D user_priority value. For non-VLAN devices or for inbound 50 * packets, this module does not do anything (i.e. the packet is processed by 51 * the next action in the list, if present). 52 * This module does not free any mblks or packets in case or errors. 53 */ 54 55 int 56 dlcosmk_process(mblk_t **mpp, dlcosmk_data_t *dlcosmk_data, uint32_t ill_index, 57 ip_proc_t proc) 58 { 59 ill_t *ill = NULL; 60 mblk_t *mp; 61 62 ASSERT((mpp != NULL) && (*mpp != NULL)); 63 mp = *mpp; 64 65 /* 66 * The action module will receive an M_DATA or an M_CTL followed 67 * by an M_DATA. In the latter case skip the M_CTL. 68 */ 69 if (mp->b_datap->db_type != M_DATA) { 70 if ((mp->b_cont == NULL) || 71 (mp->b_cont->b_datap->db_type != M_DATA)) { 72 atomic_add_64(&dlcosmk_data->epackets, 1); 73 dlcosmk0dbg(("dlcosmk_process: no data\n")); 74 return (EINVAL); 75 } 76 } 77 78 /* Update global stats */ 79 atomic_add_64(&dlcosmk_data->npackets, 1); 80 81 /* 82 * This should only be called for outgoing packets. For inbound, just 83 * send it along. 84 */ 85 if ((proc == IPP_LOCAL_IN) || (proc == IPP_FWD_IN)) { 86 dlcosmk2dbg(("dlcosmk_process:cannot mark incoming packets\n")); 87 atomic_add_64(&dlcosmk_data->ipackets, 1); 88 return (0); 89 } 90 91 if ((ill_index == 0) || 92 ((ill = ill_lookup_on_ifindex(ill_index, B_FALSE, NULL, NULL, 93 NULL, NULL)) == NULL)) { 94 dlcosmk2dbg(("dlcosmk_process:invalid ill index %u\n", 95 ill_index)); 96 atomic_add_64(&dlcosmk_data->ipackets, 1); 97 return (0); 98 } 99 100 /* 101 * Check if the interface supports CoS marking. If not send it to the 102 * next action in the chain 103 */ 104 if (!(ill->ill_flags & ILLF_COS_ENABLED)) { 105 dlcosmk2dbg(("dlcosmk_process:ill %u does not support CoS\n", 106 ill_index)); 107 atomic_add_64(&dlcosmk_data->ipackets, 1); 108 ill_refrele(ill); 109 return (0); 110 } 111 ill_refrele(ill); 112 113 114 /* 115 * Mark the b_band for fastpath messages or dl_priority.dl_max for 116 * DL_UNITDATA_REQ messages. For, others just pass it along. 117 */ 118 switch (DB_TYPE(mp)) { 119 case M_PROTO: 120 case M_PCPROTO: 121 { /* DL_UNITDATA */ 122 dl_unitdata_req_t *dlur; 123 dlur = (dl_unitdata_req_t *)mp->b_rptr; 124 125 /* DL_UNITDATA message?? */ 126 if (dlur->dl_primitive == DL_UNITDATA_REQ) { 127 dlur->dl_priority.dl_max = 128 dlcosmk_data->dl_max; 129 } else { 130 atomic_add_64(&dlcosmk_data->ipackets, 131 1); 132 } 133 break; 134 } 135 case M_DATA: 136 /* fastpath message */ 137 mp->b_band = dlcosmk_data->b_band; 138 break; 139 default: 140 atomic_add_64(&dlcosmk_data->ipackets, 1); 141 break; 142 } 143 144 return (0); 145 } 146