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 (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 24 /* All Rights Reserved */ 25 26 /* 27 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 28 * Use is subject to license terms. 29 */ 30 31 /* 32 * Copyright 2018 Nexenta Systems, Inc. All rights reserved. 33 */ 34 35 /* 36 * kTLI variant of t_optmgmt(3NSL) 37 * Returns 0 on success or an errno value. 38 * Similar to libnsl t_optmgmt.c 39 * 40 * Note: This expects the caller's struct t_optmgmt to contain the 41 * XTI version of struct T_opthdr (used with T_OPTMGMT_REQ == 27) 42 * not the old "struct opthdr" (used with T_SVR4_OPTMGMT_REQ == 9) 43 */ 44 45 #include <sys/param.h> 46 #include <sys/types.h> 47 #include <sys/proc.h> 48 #include <sys/file.h> 49 #include <sys/user.h> 50 #include <sys/vnode.h> 51 #include <sys/errno.h> 52 #include <sys/stream.h> 53 #include <sys/ioctl.h> 54 #include <sys/stropts.h> 55 #include <sys/strsubr.h> 56 #define _SUN_TPI_VERSION 2 57 #include <sys/tihdr.h> 58 #include <sys/timod.h> 59 #include <sys/tiuser.h> 60 #include <sys/t_kuser.h> 61 #include <sys/kmem.h> 62 63 int 64 t_koptmgmt(TIUSER *tiptr, struct t_optmgmt *req, struct t_optmgmt *ret) 65 { 66 struct strioctl strioc; 67 struct T_optmgmt_req *opt_req; 68 struct T_optmgmt_ack *opt_ack; 69 file_t *fp; 70 vnode_t *vp; 71 char *ctlbuf = NULL; 72 char *opt_data; 73 t_scalar_t optlen; 74 int ctlsize; 75 int retval; 76 int error; 77 78 fp = tiptr->fp; 79 vp = fp->f_vnode; 80 81 optlen = req->opt.len; 82 if (optlen > 0) { 83 if (req->opt.buf == NULL) 84 return (EINVAL); 85 if (optlen < (t_scalar_t)sizeof (struct T_opthdr)) { 86 /* option buffer should atleast have an t_opthdr */ 87 return (EINVAL); 88 } 89 /* sanity limit */ 90 if (optlen > 4096) { 91 return (EINVAL); 92 } 93 } 94 95 ctlsize = sizeof (*opt_req) + optlen; 96 ctlbuf = kmem_alloc(ctlsize, KM_SLEEP); 97 98 /* LINTED E_BAD_PTR_CAST_ALIGN */ 99 opt_req = (struct T_optmgmt_req *)ctlbuf; 100 opt_req->PRIM_type = T_OPTMGMT_REQ; 101 opt_req->MGMT_flags = req->flags; 102 opt_req->OPT_length = optlen; 103 opt_req->OPT_offset = sizeof (*opt_req); 104 if (optlen > 0) { 105 opt_data = ctlbuf + sizeof (*opt_req); 106 bcopy(req->opt.buf, opt_data, optlen); 107 } 108 109 strioc.ic_cmd = TI_OPTMGMT; 110 strioc.ic_timout = 0; 111 strioc.ic_dp = ctlbuf; 112 strioc.ic_len = ctlsize; 113 114 error = strdoioctl(vp->v_stream, &strioc, FNATIVE, K_TO_K, 115 fp->f_cred, &retval); 116 if (error) 117 goto errout; 118 119 if (retval) { 120 if ((retval & 0xff) == TSYSERR) 121 error = (retval >> 8) & 0xff; 122 else 123 error = t_tlitosyserr(retval & 0xff); 124 goto errout; 125 } 126 127 if (strioc.ic_len < sizeof (struct T_optmgmt_ack)) { 128 error = EPROTO; 129 goto errout; 130 } 131 132 /* LINTED pointer cast */ 133 opt_ack = (struct T_optmgmt_ack *)ctlbuf; 134 if (opt_ack->PRIM_type != T_OPTMGMT_ACK) { 135 error = EPROTO; 136 goto errout; 137 } 138 139 if (ret->opt.maxlen > 0) { 140 if (opt_ack->OPT_length > ret->opt.maxlen) { 141 error = EMSGSIZE; 142 goto errout; 143 } 144 ret->opt.len = opt_ack->OPT_offset; 145 opt_data = ctlbuf + opt_ack->OPT_offset; 146 bcopy(opt_data, ret->opt.buf, ret->opt.len); 147 } 148 ret->flags = opt_ack->MGMT_flags; 149 150 errout: 151 if (ctlbuf != NULL) 152 kmem_free(ctlbuf, ctlsize); 153 return (error); 154 } 155