bio.c revision 1.1.2.2
1 1.1.2.2 yamt /* $NetBSD: bio.c,v 1.1.2.2 2007/05/07 10:55:23 yamt Exp $ */ 2 1.1.2.2 yamt /* $OpenBSD: bio.c,v 1.9 2007/03/20 02:35:55 marco Exp $ */ 3 1.1.2.2 yamt 4 1.1.2.2 yamt /* 5 1.1.2.2 yamt * Copyright (c) 2002 Niklas Hallqvist. All rights reserved. 6 1.1.2.2 yamt * 7 1.1.2.2 yamt * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 yamt * modification, are permitted provided that the following conditions 9 1.1.2.2 yamt * are met: 10 1.1.2.2 yamt * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 yamt * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 yamt * documentation and/or other materials provided with the distribution. 15 1.1.2.2 yamt * 16 1.1.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.1.2.2 yamt * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.1.2.2 yamt * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.1.2.2 yamt * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.1.2.2 yamt * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 1.1.2.2 yamt * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 1.1.2.2 yamt * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 1.1.2.2 yamt * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 1.1.2.2 yamt * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 1.1.2.2 yamt * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 1.1.2.2 yamt */ 27 1.1.2.2 yamt 28 1.1.2.2 yamt /* A device controller ioctl tunnelling device. */ 29 1.1.2.2 yamt 30 1.1.2.2 yamt #include <sys/cdefs.h> 31 1.1.2.2 yamt __KERNEL_RCSID(0, "$NetBSD: bio.c,v 1.1.2.2 2007/05/07 10:55:23 yamt Exp $"); 32 1.1.2.2 yamt 33 1.1.2.2 yamt #include <sys/param.h> 34 1.1.2.2 yamt #include <sys/conf.h> 35 1.1.2.2 yamt #include <sys/device.h> 36 1.1.2.2 yamt #include <sys/event.h> 37 1.1.2.2 yamt #include <sys/ioctl.h> 38 1.1.2.2 yamt #include <sys/malloc.h> 39 1.1.2.2 yamt #include <sys/queue.h> 40 1.1.2.2 yamt #include <sys/systm.h> 41 1.1.2.2 yamt #include <sys/mutex.h> 42 1.1.2.2 yamt #include <sys/proc.h> 43 1.1.2.2 yamt #include <sys/kauth.h> 44 1.1.2.2 yamt 45 1.1.2.2 yamt #include <dev/biovar.h> 46 1.1.2.2 yamt 47 1.1.2.2 yamt struct bio_mapping { 48 1.1.2.2 yamt LIST_ENTRY(bio_mapping) bm_link; 49 1.1.2.2 yamt struct device *bm_dev; 50 1.1.2.2 yamt int (*bm_ioctl)(struct device *, u_long, void *); 51 1.1.2.2 yamt }; 52 1.1.2.2 yamt 53 1.1.2.2 yamt LIST_HEAD(, bio_mapping) bios = LIST_HEAD_INITIALIZER(bios); 54 1.1.2.2 yamt static kmutex_t bio_lock; 55 1.1.2.2 yamt 56 1.1.2.2 yamt void bioattach(int); 57 1.1.2.2 yamt int bioclose(dev_t, int, int, struct lwp *); 58 1.1.2.2 yamt int bioioctl(dev_t, u_long, void *, int, struct lwp *); 59 1.1.2.2 yamt int bioopen(dev_t, int, int, struct lwp *); 60 1.1.2.2 yamt 61 1.1.2.2 yamt int bio_delegate_ioctl(struct bio_mapping *, u_long, void *); 62 1.1.2.2 yamt struct bio_mapping *bio_lookup(char *); 63 1.1.2.2 yamt int bio_validate(void *); 64 1.1.2.2 yamt 65 1.1.2.2 yamt const struct cdevsw bio_cdevsw = { 66 1.1.2.2 yamt bioopen, bioclose, noread, nowrite, bioioctl, 67 1.1.2.2 yamt nostop, notty, nopoll, nommap, nokqfilter, 0 68 1.1.2.2 yamt }; 69 1.1.2.2 yamt 70 1.1.2.2 yamt 71 1.1.2.2 yamt void 72 1.1.2.2 yamt bioattach(int nunits) 73 1.1.2.2 yamt { 74 1.1.2.2 yamt mutex_init(&bio_lock, MUTEX_DRIVER, IPL_BIO); 75 1.1.2.2 yamt } 76 1.1.2.2 yamt 77 1.1.2.2 yamt int 78 1.1.2.2 yamt bioopen(dev_t dev, int flags, int mode, struct lwp *l) 79 1.1.2.2 yamt { 80 1.1.2.2 yamt return (0); 81 1.1.2.2 yamt } 82 1.1.2.2 yamt 83 1.1.2.2 yamt int 84 1.1.2.2 yamt bioclose(dev_t dev, int flags, int mode, struct lwp *l) 85 1.1.2.2 yamt { 86 1.1.2.2 yamt return (0); 87 1.1.2.2 yamt } 88 1.1.2.2 yamt 89 1.1.2.2 yamt int 90 1.1.2.2 yamt bioioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) 91 1.1.2.2 yamt { 92 1.1.2.2 yamt struct bio_locate *locate; 93 1.1.2.2 yamt struct bio_common *common; 94 1.1.2.2 yamt char name[16]; 95 1.1.2.2 yamt int error; 96 1.1.2.2 yamt 97 1.1.2.2 yamt switch(cmd) { 98 1.1.2.2 yamt case BIOCLOCATE: 99 1.1.2.2 yamt case BIOCINQ: 100 1.1.2.2 yamt case BIOCDISK: 101 1.1.2.2 yamt case BIOCVOL: 102 1.1.2.2 yamt error = kauth_authorize_device_passthru(l->l_cred, dev, 103 1.1.2.2 yamt KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_READCONF, addr); 104 1.1.2.2 yamt if (error) 105 1.1.2.2 yamt return (error); 106 1.1.2.2 yamt break; 107 1.1.2.2 yamt case BIOCBLINK: 108 1.1.2.2 yamt case BIOCSETSTATE: 109 1.1.2.2 yamt error = kauth_authorize_device_passthru(l->l_cred, dev, 110 1.1.2.2 yamt KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_WRITECONF, addr); 111 1.1.2.2 yamt if (error) 112 1.1.2.2 yamt return (error); 113 1.1.2.2 yamt break; 114 1.1.2.2 yamt case BIOCALARM: { 115 1.1.2.2 yamt struct bioc_alarm *alarm = (struct bioc_alarm *)addr; 116 1.1.2.2 yamt switch (alarm->ba_opcode) { 117 1.1.2.2 yamt case BIOC_SADISABLE: 118 1.1.2.2 yamt case BIOC_SAENABLE: 119 1.1.2.2 yamt case BIOC_SASILENCE: 120 1.1.2.2 yamt case BIOC_SATEST: 121 1.1.2.2 yamt error = kauth_authorize_device_passthru(l->l_cred, dev, 122 1.1.2.2 yamt KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_WRITECONF, addr); 123 1.1.2.2 yamt if (error) 124 1.1.2.2 yamt return (error); 125 1.1.2.2 yamt break; 126 1.1.2.2 yamt case BIOC_GASTATUS: 127 1.1.2.2 yamt error = kauth_authorize_device_passthru(l->l_cred, dev, 128 1.1.2.2 yamt KAUTH_REQ_DEVICE_RAWIO_PASSTHRU_READCONF, addr); 129 1.1.2.2 yamt if (error) 130 1.1.2.2 yamt return (error); 131 1.1.2.2 yamt break; 132 1.1.2.2 yamt default: 133 1.1.2.2 yamt return EINVAL; 134 1.1.2.2 yamt } 135 1.1.2.2 yamt break; 136 1.1.2.2 yamt } 137 1.1.2.2 yamt default: 138 1.1.2.2 yamt return ENOTTY; 139 1.1.2.2 yamt } 140 1.1.2.2 yamt 141 1.1.2.2 yamt switch (cmd) { 142 1.1.2.2 yamt case BIOCLOCATE: 143 1.1.2.2 yamt locate = (struct bio_locate *)addr; 144 1.1.2.2 yamt error = copyinstr(locate->bl_name, name, 16, NULL); 145 1.1.2.2 yamt if (error != 0) 146 1.1.2.2 yamt return (error); 147 1.1.2.2 yamt locate->bl_cookie = bio_lookup(name); 148 1.1.2.2 yamt if (locate->bl_cookie == NULL) 149 1.1.2.2 yamt return (ENOENT); 150 1.1.2.2 yamt break; 151 1.1.2.2 yamt 152 1.1.2.2 yamt default: 153 1.1.2.2 yamt common = (struct bio_common *)addr; 154 1.1.2.2 yamt mutex_enter(&bio_lock); 155 1.1.2.2 yamt if (!bio_validate(common->bc_cookie)) { 156 1.1.2.2 yamt mutex_exit(&bio_lock); 157 1.1.2.2 yamt return (ENOENT); 158 1.1.2.2 yamt } 159 1.1.2.2 yamt mutex_exit(&bio_lock); 160 1.1.2.2 yamt error = bio_delegate_ioctl( 161 1.1.2.2 yamt (struct bio_mapping *)common->bc_cookie, cmd, addr); 162 1.1.2.2 yamt return (error); 163 1.1.2.2 yamt } 164 1.1.2.2 yamt return (0); 165 1.1.2.2 yamt } 166 1.1.2.2 yamt 167 1.1.2.2 yamt int 168 1.1.2.2 yamt bio_register(struct device *dev, int (*ioctl)(struct device *, u_long, void *)) 169 1.1.2.2 yamt { 170 1.1.2.2 yamt struct bio_mapping *bm; 171 1.1.2.2 yamt 172 1.1.2.2 yamt MALLOC(bm, struct bio_mapping *, sizeof *bm, M_DEVBUF, M_NOWAIT); 173 1.1.2.2 yamt if (bm == NULL) 174 1.1.2.2 yamt return (ENOMEM); 175 1.1.2.2 yamt bm->bm_dev = dev; 176 1.1.2.2 yamt bm->bm_ioctl = ioctl; 177 1.1.2.2 yamt mutex_enter(&bio_lock); 178 1.1.2.2 yamt LIST_INSERT_HEAD(&bios, bm, bm_link); 179 1.1.2.2 yamt mutex_exit(&bio_lock); 180 1.1.2.2 yamt return (0); 181 1.1.2.2 yamt } 182 1.1.2.2 yamt 183 1.1.2.2 yamt void 184 1.1.2.2 yamt bio_unregister(struct device *dev) 185 1.1.2.2 yamt { 186 1.1.2.2 yamt struct bio_mapping *bm, *next; 187 1.1.2.2 yamt 188 1.1.2.2 yamt mutex_enter(&bio_lock); 189 1.1.2.2 yamt for (bm = LIST_FIRST(&bios); bm != NULL; bm = next) { 190 1.1.2.2 yamt next = LIST_NEXT(bm, bm_link); 191 1.1.2.2 yamt 192 1.1.2.2 yamt if (dev == bm->bm_dev) { 193 1.1.2.2 yamt LIST_REMOVE(bm, bm_link); 194 1.1.2.2 yamt free(bm, M_DEVBUF); 195 1.1.2.2 yamt } 196 1.1.2.2 yamt } 197 1.1.2.2 yamt mutex_exit(&bio_lock); 198 1.1.2.2 yamt } 199 1.1.2.2 yamt 200 1.1.2.2 yamt struct bio_mapping * 201 1.1.2.2 yamt bio_lookup(char *name) 202 1.1.2.2 yamt { 203 1.1.2.2 yamt struct bio_mapping *bm; 204 1.1.2.2 yamt 205 1.1.2.2 yamt mutex_enter(&bio_lock); 206 1.1.2.2 yamt LIST_FOREACH(bm, &bios, bm_link) { 207 1.1.2.2 yamt if (strcmp(name, bm->bm_dev->dv_xname) == 0) { 208 1.1.2.2 yamt mutex_exit(&bio_lock); 209 1.1.2.2 yamt return (bm); 210 1.1.2.2 yamt } 211 1.1.2.2 yamt } 212 1.1.2.2 yamt mutex_exit(&bio_lock); 213 1.1.2.2 yamt return (NULL); 214 1.1.2.2 yamt } 215 1.1.2.2 yamt 216 1.1.2.2 yamt int 217 1.1.2.2 yamt bio_validate(void *cookie) 218 1.1.2.2 yamt { 219 1.1.2.2 yamt struct bio_mapping *bm; 220 1.1.2.2 yamt 221 1.1.2.2 yamt LIST_FOREACH(bm, &bios, bm_link) { 222 1.1.2.2 yamt if (bm == cookie) { 223 1.1.2.2 yamt return (1); 224 1.1.2.2 yamt } 225 1.1.2.2 yamt } 226 1.1.2.2 yamt return (0); 227 1.1.2.2 yamt } 228 1.1.2.2 yamt 229 1.1.2.2 yamt int 230 1.1.2.2 yamt bio_delegate_ioctl(struct bio_mapping *bm, u_long cmd, void *addr) 231 1.1.2.2 yamt { 232 1.1.2.2 yamt 233 1.1.2.2 yamt return (bm->bm_ioctl(bm->bm_dev, cmd, addr)); 234 1.1.2.2 yamt } 235
Indexes created Mon Oct 13 01:09:56 GMT 2025