1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate /* 30*0Sstevel@tonic-gate * Redirection STREAMS module. 31*0Sstevel@tonic-gate * 32*0Sstevel@tonic-gate * This module is intended for use in conjunction with instantiations of the 33*0Sstevel@tonic-gate * redirection driver. Its purpose in life is to detect when the stream that 34*0Sstevel@tonic-gate * it's pushed on is closed, thereupon calling back into the redirection 35*0Sstevel@tonic-gate * driver so that the driver can cancel redirection to the stream. 36*0Sstevel@tonic-gate */ 37*0Sstevel@tonic-gate 38*0Sstevel@tonic-gate #include <sys/types.h> 39*0Sstevel@tonic-gate #include <sys/param.h> 40*0Sstevel@tonic-gate #include <sys/errno.h> 41*0Sstevel@tonic-gate #include <sys/kmem.h> 42*0Sstevel@tonic-gate 43*0Sstevel@tonic-gate #include <sys/stream.h> 44*0Sstevel@tonic-gate #include <sys/stropts.h> 45*0Sstevel@tonic-gate 46*0Sstevel@tonic-gate #include <sys/debug.h> 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate #include <sys/strredir.h> 49*0Sstevel@tonic-gate #include <sys/thread.h> 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate #include <sys/conf.h> 52*0Sstevel@tonic-gate #include <sys/ddi.h> 53*0Sstevel@tonic-gate #include <sys/sunddi.h> 54*0Sstevel@tonic-gate #include <sys/modctl.h> 55*0Sstevel@tonic-gate 56*0Sstevel@tonic-gate /* 57*0Sstevel@tonic-gate * Forward declarations for private routines. 58*0Sstevel@tonic-gate */ 59*0Sstevel@tonic-gate static int wcmopen(queue_t *, dev_t *, int, int, cred_t *); 60*0Sstevel@tonic-gate static int wcmclose(queue_t *, int, cred_t *); 61*0Sstevel@tonic-gate static int wcmput(queue_t *, mblk_t *); 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate static struct module_info wcminfo = { 64*0Sstevel@tonic-gate _STRREDIR_MODID, 65*0Sstevel@tonic-gate "redirmod", 66*0Sstevel@tonic-gate 0, 67*0Sstevel@tonic-gate INFPSZ, 68*0Sstevel@tonic-gate 5120, 69*0Sstevel@tonic-gate 1024 70*0Sstevel@tonic-gate }; 71*0Sstevel@tonic-gate 72*0Sstevel@tonic-gate static struct qinit wcmrinit = { 73*0Sstevel@tonic-gate wcmput, /* put */ 74*0Sstevel@tonic-gate NULL, /* service */ 75*0Sstevel@tonic-gate wcmopen, /* open */ 76*0Sstevel@tonic-gate wcmclose, /* close */ 77*0Sstevel@tonic-gate NULL, /* qadmin */ 78*0Sstevel@tonic-gate &wcminfo, 79*0Sstevel@tonic-gate NULL /* mstat */ 80*0Sstevel@tonic-gate }; 81*0Sstevel@tonic-gate 82*0Sstevel@tonic-gate static struct qinit wcmwinit = { 83*0Sstevel@tonic-gate wcmput, /* put */ 84*0Sstevel@tonic-gate NULL, /* service */ 85*0Sstevel@tonic-gate wcmopen, /* open */ 86*0Sstevel@tonic-gate wcmclose, /* close */ 87*0Sstevel@tonic-gate NULL, /* qadmin */ 88*0Sstevel@tonic-gate &wcminfo, 89*0Sstevel@tonic-gate NULL /* mstat */ 90*0Sstevel@tonic-gate }; 91*0Sstevel@tonic-gate 92*0Sstevel@tonic-gate static struct streamtab redirminfo = { 93*0Sstevel@tonic-gate &wcmrinit, 94*0Sstevel@tonic-gate &wcmwinit, 95*0Sstevel@tonic-gate NULL, 96*0Sstevel@tonic-gate NULL 97*0Sstevel@tonic-gate }; 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate static struct fmodsw fsw = { 100*0Sstevel@tonic-gate "redirmod", 101*0Sstevel@tonic-gate &redirminfo, 102*0Sstevel@tonic-gate D_NEW | D_MP 103*0Sstevel@tonic-gate }; 104*0Sstevel@tonic-gate 105*0Sstevel@tonic-gate static struct modlstrmod modlstrmod = { 106*0Sstevel@tonic-gate &mod_strmodops, 107*0Sstevel@tonic-gate "redirection module", 108*0Sstevel@tonic-gate &fsw 109*0Sstevel@tonic-gate }; 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate static struct modlinkage modlinkage = { 112*0Sstevel@tonic-gate MODREV_1, &modlstrmod, NULL 113*0Sstevel@tonic-gate }; 114*0Sstevel@tonic-gate 115*0Sstevel@tonic-gate int 116*0Sstevel@tonic-gate _init() 117*0Sstevel@tonic-gate { 118*0Sstevel@tonic-gate return (mod_install(&modlinkage)); 119*0Sstevel@tonic-gate } 120*0Sstevel@tonic-gate 121*0Sstevel@tonic-gate int 122*0Sstevel@tonic-gate _fini() 123*0Sstevel@tonic-gate { 124*0Sstevel@tonic-gate return (EBUSY); 125*0Sstevel@tonic-gate } 126*0Sstevel@tonic-gate 127*0Sstevel@tonic-gate int 128*0Sstevel@tonic-gate _info(struct modinfo *modinfop) 129*0Sstevel@tonic-gate { 130*0Sstevel@tonic-gate return (mod_info(&modlinkage, modinfop)); 131*0Sstevel@tonic-gate } 132*0Sstevel@tonic-gate 133*0Sstevel@tonic-gate /* ARGSUSED */ 134*0Sstevel@tonic-gate static int 135*0Sstevel@tonic-gate wcmopen(queue_t *q, dev_t *dev, int flag, int sflag, cred_t *cred) 136*0Sstevel@tonic-gate { 137*0Sstevel@tonic-gate extern kthread_t *iwscn_thread; 138*0Sstevel@tonic-gate extern wcm_data_t *iwscn_wcm_data; 139*0Sstevel@tonic-gate 140*0Sstevel@tonic-gate if (sflag != MODOPEN) 141*0Sstevel@tonic-gate return (EINVAL); 142*0Sstevel@tonic-gate 143*0Sstevel@tonic-gate /* 144*0Sstevel@tonic-gate * There's nothing to do if we're already open. 145*0Sstevel@tonic-gate */ 146*0Sstevel@tonic-gate if (q->q_ptr == NULL) { 147*0Sstevel@tonic-gate /* 148*0Sstevel@tonic-gate * Attach the per open instance state structure. 149*0Sstevel@tonic-gate * Its fields were * initialized elsewhere (from the 150*0Sstevel@tonic-gate * SRIOCSREDIR case of of the redirection driver's ioctl 151*0Sstevel@tonic-gate * routine). 152*0Sstevel@tonic-gate * To prevent other threads from getting this, check thread_id. 153*0Sstevel@tonic-gate */ 154*0Sstevel@tonic-gate if (curthread != iwscn_thread) 155*0Sstevel@tonic-gate return (EINVAL); 156*0Sstevel@tonic-gate q->q_ptr = WR(q)->q_ptr = iwscn_wcm_data; 157*0Sstevel@tonic-gate } 158*0Sstevel@tonic-gate qprocson(q); 159*0Sstevel@tonic-gate return (0); 160*0Sstevel@tonic-gate } 161*0Sstevel@tonic-gate 162*0Sstevel@tonic-gate /* ARGSUSED */ 163*0Sstevel@tonic-gate static int 164*0Sstevel@tonic-gate wcmclose(queue_t *q, int flag, cred_t *cred) 165*0Sstevel@tonic-gate { 166*0Sstevel@tonic-gate wcm_data_t *mdp = (wcm_data_t *)q->q_ptr; 167*0Sstevel@tonic-gate 168*0Sstevel@tonic-gate qprocsoff(q); 169*0Sstevel@tonic-gate srpop(mdp, flag, cred); 170*0Sstevel@tonic-gate WR(q)->q_ptr = q->q_ptr = NULL; 171*0Sstevel@tonic-gate kmem_free(mdp, sizeof (*mdp)); 172*0Sstevel@tonic-gate 173*0Sstevel@tonic-gate return (0); 174*0Sstevel@tonic-gate } 175*0Sstevel@tonic-gate 176*0Sstevel@tonic-gate /* 177*0Sstevel@tonic-gate * This module's only purpose in life is to intercept closes on the stream 178*0Sstevel@tonic-gate * it's pushed on. It passes all messages on unchanged, in both directions. 179*0Sstevel@tonic-gate */ 180*0Sstevel@tonic-gate static int 181*0Sstevel@tonic-gate wcmput(queue_t *q, mblk_t *mp) 182*0Sstevel@tonic-gate { 183*0Sstevel@tonic-gate putnext(q, mp); 184*0Sstevel@tonic-gate return (0); 185*0Sstevel@tonic-gate } 186