| 1 | /* $NetBSD: puffs_compat.c,v 1.4 2015/04/22 17:07:24 pooka Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2010 Antti Kantee. All Rights Reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS |
| 16 | * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 17 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 18 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 19 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 20 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 21 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 23 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 24 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 25 | * SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | /* |
| 29 | * This file handles puffs PDUs so that they are compatible between |
| 30 | * 32bit<->64bit time_t/dev_t. It enables running a -current kernel |
| 31 | * against a 5.0 userland (assuming the protocol otherwise matches!). |
| 32 | */ |
| 33 | |
| 34 | #include <sys/cdefs.h> |
| 35 | __KERNEL_RCSID(0, "$NetBSD: puffs_compat.c,v 1.4 2015/04/22 17:07:24 pooka Exp $" ); |
| 36 | |
| 37 | #include <sys/param.h> |
| 38 | #include <sys/atomic.h> |
| 39 | #include <sys/kmem.h> |
| 40 | #include <sys/kthread.h> |
| 41 | #include <sys/lock.h> |
| 42 | #include <sys/mount.h> |
| 43 | #include <sys/namei.h> |
| 44 | #include <sys/proc.h> |
| 45 | #include <sys/vnode.h> |
| 46 | #include <sys/atomic.h> |
| 47 | |
| 48 | #include <dev/putter/putter_sys.h> |
| 49 | |
| 50 | #include <fs/puffs/puffs_msgif.h> |
| 51 | #include <fs/puffs/puffs_sys.h> |
| 52 | |
| 53 | #include <compat/sys/time.h> |
| 54 | |
| 55 | /* |
| 56 | * compat types |
| 57 | */ |
| 58 | struct vattr50 { |
| 59 | enum vtype va_type; |
| 60 | mode_t va_mode; |
| 61 | nlink_t va_nlink; |
| 62 | uid_t va_uid; |
| 63 | gid_t va_gid; |
| 64 | uint32_t va_fsid; |
| 65 | ino_t va_fileid; |
| 66 | u_quad_t va_size; |
| 67 | long va_blocksize; |
| 68 | struct timespec50 va_atime; |
| 69 | struct timespec50 va_mtime; |
| 70 | struct timespec50 va_ctime; |
| 71 | struct timespec50 va_birthtime; |
| 72 | u_long va_gen; |
| 73 | u_long va_flags; |
| 74 | uint32_t va_rdev; |
| 75 | u_quad_t va_bytes; |
| 76 | u_quad_t va_filerev; |
| 77 | u_int va_vaflags; |
| 78 | long va_spare; |
| 79 | }; |
| 80 | |
| 81 | struct puffs50_vfsmsg_fhtonode { |
| 82 | struct puffs_req pvfsr_pr; |
| 83 | |
| 84 | void *pvfsr_fhcookie; /* IN */ |
| 85 | enum vtype pvfsr_vtype; /* IN */ |
| 86 | voff_t pvfsr_size; /* IN */ |
| 87 | uint32_t pvfsr_rdev; /* IN */ |
| 88 | |
| 89 | size_t pvfsr_dsize; /* OUT */ |
| 90 | uint8_t pvfsr_data[0] /* OUT, XXX */ |
| 91 | __aligned(ALIGNBYTES+1); |
| 92 | }; |
| 93 | |
| 94 | struct puffs50_vnmsg_lookup { |
| 95 | struct puffs_req pvn_pr; |
| 96 | |
| 97 | struct puffs_kcn pvnr_cn; /* OUT */ |
| 98 | struct puffs_kcred pvnr_cn_cred; /* OUT */ |
| 99 | |
| 100 | puffs_cookie_t pvnr_newnode; /* IN */ |
| 101 | enum vtype pvnr_vtype; /* IN */ |
| 102 | voff_t pvnr_size; /* IN */ |
| 103 | uint32_t pvnr_rdev; /* IN */ |
| 104 | }; |
| 105 | |
| 106 | struct puffs50_vnmsg_create { |
| 107 | struct puffs_req pvn_pr; |
| 108 | |
| 109 | struct puffs_kcn pvnr_cn; /* OUT */ |
| 110 | struct puffs_kcred pvnr_cn_cred; /* OUT */ |
| 111 | |
| 112 | struct vattr50 pvnr_va; /* OUT */ |
| 113 | puffs_cookie_t pvnr_newnode; /* IN */ |
| 114 | }; |
| 115 | |
| 116 | struct puffs50_vnmsg_mknod { |
| 117 | struct puffs_req pvn_pr; |
| 118 | |
| 119 | struct puffs_kcn pvnr_cn; /* OUT */ |
| 120 | struct puffs_kcred pvnr_cn_cred; /* OUT */ |
| 121 | |
| 122 | struct vattr50 pvnr_va; /* OUT */ |
| 123 | puffs_cookie_t pvnr_newnode; /* IN */ |
| 124 | }; |
| 125 | |
| 126 | #define puffs50_vnmsg_setattr puffs50_vnmsg_setgetattr |
| 127 | #define puffs50_vnmsg_getattr puffs50_vnmsg_setgetattr |
| 128 | struct puffs50_vnmsg_setgetattr { |
| 129 | struct puffs_req pvn_pr; |
| 130 | |
| 131 | struct puffs_kcred pvnr_cred; /* OUT */ |
| 132 | struct vattr50 pvnr_va; /* IN/OUT (op depend) */ |
| 133 | }; |
| 134 | |
| 135 | struct puffs50_vnmsg_mkdir { |
| 136 | struct puffs_req pvn_pr; |
| 137 | |
| 138 | struct puffs_kcn pvnr_cn; /* OUT */ |
| 139 | struct puffs_kcred pvnr_cn_cred; /* OUT */ |
| 140 | |
| 141 | struct vattr50 pvnr_va; /* OUT */ |
| 142 | puffs_cookie_t pvnr_newnode; /* IN */ |
| 143 | }; |
| 144 | |
| 145 | struct puffs50_vnmsg_symlink { |
| 146 | struct puffs_req pvn_pr; |
| 147 | |
| 148 | struct puffs_kcn pvnr_cn; /* OUT */ |
| 149 | struct puffs_kcred pvnr_cn_cred; /* OUT */ |
| 150 | |
| 151 | struct vattr50 pvnr_va; /* OUT */ |
| 152 | puffs_cookie_t pvnr_newnode; /* IN */ |
| 153 | char pvnr_link[MAXPATHLEN]; /* OUT */ |
| 154 | }; |
| 155 | |
| 156 | /* |
| 157 | * vattr translation routines |
| 158 | */ |
| 159 | |
| 160 | #ifdef COMPAT_50 |
| 161 | static void |
| 162 | vattr_to_50(const struct vattr *va, struct vattr50 *va50) |
| 163 | { |
| 164 | |
| 165 | va50->va_type = va->va_type; |
| 166 | va50->va_mode = va->va_mode; |
| 167 | va50->va_nlink = va->va_nlink; |
| 168 | va50->va_uid = va->va_uid; |
| 169 | va50->va_gid = va->va_gid; |
| 170 | va50->va_fsid = (uint64_t)va->va_fsid; |
| 171 | va50->va_fileid = va->va_fileid; |
| 172 | va50->va_size = va->va_size; |
| 173 | va50->va_blocksize = va->va_blocksize; |
| 174 | timespec_to_timespec50(&va->va_atime, &va50->va_atime); |
| 175 | timespec_to_timespec50(&va->va_ctime, &va50->va_ctime); |
| 176 | timespec_to_timespec50(&va->va_mtime, &va50->va_mtime); |
| 177 | timespec_to_timespec50(&va->va_birthtime, &va50->va_birthtime); |
| 178 | va50->va_gen = va->va_gen; |
| 179 | va50->va_flags = va->va_flags; |
| 180 | va50->va_rdev = (int32_t)va->va_rdev; |
| 181 | va50->va_bytes = va->va_bytes; |
| 182 | va50->va_filerev = va->va_filerev; |
| 183 | va50->va_vaflags = va->va_flags; |
| 184 | } |
| 185 | |
| 186 | static void |
| 187 | vattr_from_50(const struct vattr50 *va50, struct vattr *va) |
| 188 | { |
| 189 | |
| 190 | va->va_type = va50->va_type; |
| 191 | va->va_mode = va50->va_mode; |
| 192 | va->va_nlink = va50->va_nlink; |
| 193 | va->va_uid = va50->va_uid; |
| 194 | va->va_gid = va50->va_gid; |
| 195 | va->va_fsid = (uint32_t)va50->va_fsid; |
| 196 | va->va_fileid = va50->va_fileid; |
| 197 | va->va_size = va50->va_size; |
| 198 | va->va_blocksize = va50->va_blocksize; |
| 199 | timespec50_to_timespec(&va50->va_atime, &va->va_atime); |
| 200 | timespec50_to_timespec(&va50->va_ctime, &va->va_ctime); |
| 201 | timespec50_to_timespec(&va50->va_mtime, &va->va_mtime); |
| 202 | timespec50_to_timespec(&va50->va_birthtime, &va->va_birthtime); |
| 203 | va->va_gen = va50->va_gen; |
| 204 | va->va_flags = va50->va_flags; |
| 205 | va->va_rdev = (uint32_t)va50->va_rdev; |
| 206 | va->va_bytes = va50->va_bytes; |
| 207 | va->va_filerev = va50->va_filerev; |
| 208 | va->va_vaflags = va50->va_flags; |
| 209 | } |
| 210 | #endif /* COMPAT_50 */ |
| 211 | |
| 212 | /* |
| 213 | * XXX: cannot assert that sleeping is possible |
| 214 | * (this always a valid assumption for now) |
| 215 | */ |
| 216 | #define INIT(name, extra) \ |
| 217 | struct puffs50_##name *cmsg; \ |
| 218 | struct puffs_##name *omsg; \ |
| 219 | creq =kmem_zalloc(sizeof(struct puffs50_##name)+extra,KM_SLEEP);\ |
| 220 | cmsg = (struct puffs50_##name *)creq; \ |
| 221 | omsg = (struct puffs_##name *)oreq; \ |
| 222 | delta = sizeof(struct puffs50_##name)-sizeof(struct puffs_##name); |
| 223 | #define ASSIGN(field) \ |
| 224 | cmsg->field = omsg->field; |
| 225 | |
| 226 | bool |
| 227 | puffs_compat_outgoing(struct puffs_req *oreq, |
| 228 | struct puffs_req **creqp, ssize_t *deltap) |
| 229 | { |
| 230 | bool rv = false; |
| 231 | #ifdef COMPAT_50 |
| 232 | struct puffs_req *creq = NULL; |
| 233 | ssize_t delta = 0; |
| 234 | |
| 235 | if (PUFFSOP_OPCLASS(oreq->preq_opclass) == PUFFSOP_VFS |
| 236 | && oreq->preq_optype == PUFFS_VFS_FHTOVP) { |
| 237 | INIT(vfsmsg_fhtonode, |
| 238 | ((struct puffs_vfsmsg_fhtonode *)oreq)->pvfsr_dsize); |
| 239 | |
| 240 | ASSIGN(pvfsr_pr); |
| 241 | ASSIGN(pvfsr_dsize); |
| 242 | memcpy(cmsg->pvfsr_data, omsg->pvfsr_data, cmsg->pvfsr_dsize); |
| 243 | } else if (PUFFSOP_OPCLASS(oreq->preq_opclass) == PUFFSOP_VN) { |
| 244 | switch (oreq->preq_optype) { |
| 245 | case PUFFS_VN_LOOKUP: |
| 246 | { |
| 247 | INIT(vnmsg_lookup, 0); |
| 248 | |
| 249 | ASSIGN(pvn_pr); |
| 250 | ASSIGN(pvnr_cn); |
| 251 | ASSIGN(pvnr_cn_cred); |
| 252 | |
| 253 | break; |
| 254 | } |
| 255 | |
| 256 | case PUFFS_VN_CREATE: |
| 257 | { |
| 258 | INIT(vnmsg_create, 0); |
| 259 | |
| 260 | ASSIGN(pvn_pr); |
| 261 | ASSIGN(pvnr_cn); |
| 262 | ASSIGN(pvnr_cn_cred); |
| 263 | vattr_to_50(&omsg->pvnr_va, &cmsg->pvnr_va); |
| 264 | |
| 265 | break; |
| 266 | } |
| 267 | |
| 268 | case PUFFS_VN_MKNOD: |
| 269 | { |
| 270 | INIT(vnmsg_mknod, 0); |
| 271 | |
| 272 | ASSIGN(pvn_pr); |
| 273 | ASSIGN(pvnr_cn); |
| 274 | ASSIGN(pvnr_cn_cred); |
| 275 | vattr_to_50(&omsg->pvnr_va, &cmsg->pvnr_va); |
| 276 | |
| 277 | break; |
| 278 | } |
| 279 | |
| 280 | case PUFFS_VN_MKDIR: |
| 281 | { |
| 282 | INIT(vnmsg_mkdir, 0); |
| 283 | |
| 284 | ASSIGN(pvn_pr); |
| 285 | ASSIGN(pvnr_cn); |
| 286 | ASSIGN(pvnr_cn_cred); |
| 287 | vattr_to_50(&omsg->pvnr_va, &cmsg->pvnr_va); |
| 288 | |
| 289 | break; |
| 290 | } |
| 291 | |
| 292 | case PUFFS_VN_SYMLINK: |
| 293 | { |
| 294 | INIT(vnmsg_symlink, 0); |
| 295 | |
| 296 | ASSIGN(pvn_pr); |
| 297 | ASSIGN(pvnr_cn); |
| 298 | ASSIGN(pvnr_cn_cred); |
| 299 | vattr_to_50(&omsg->pvnr_va, &cmsg->pvnr_va); |
| 300 | memcpy(cmsg->pvnr_link, omsg->pvnr_link, |
| 301 | sizeof(cmsg->pvnr_link)); |
| 302 | |
| 303 | break; |
| 304 | } |
| 305 | |
| 306 | case PUFFS_VN_SETATTR: |
| 307 | { |
| 308 | INIT(vnmsg_setattr, 0); |
| 309 | |
| 310 | ASSIGN(pvn_pr); |
| 311 | ASSIGN(pvnr_cred); |
| 312 | vattr_to_50(&omsg->pvnr_va, &cmsg->pvnr_va); |
| 313 | |
| 314 | break; |
| 315 | } |
| 316 | case PUFFS_VN_GETATTR: |
| 317 | { |
| 318 | INIT(vnmsg_getattr, 0); |
| 319 | |
| 320 | ASSIGN(pvn_pr); |
| 321 | ASSIGN(pvnr_cred); |
| 322 | |
| 323 | break; |
| 324 | } |
| 325 | |
| 326 | default: |
| 327 | break; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | if (creq) { |
| 332 | *creqp = creq; |
| 333 | *deltap = delta; |
| 334 | rv = true; |
| 335 | } |
| 336 | #endif |
| 337 | |
| 338 | return rv; |
| 339 | } |
| 340 | #undef INIT |
| 341 | #undef ASSIGN |
| 342 | |
| 343 | #define INIT(name) \ |
| 344 | struct puffs50_##name *cmsg = (void *)preq; \ |
| 345 | struct puffs_##name *omsg = (void *)creq; |
| 346 | #define ASSIGN(field) \ |
| 347 | omsg->field = cmsg->field; |
| 348 | |
| 349 | void |
| 350 | puffs_compat_incoming(struct puffs_req *preq, struct puffs_req *creq) |
| 351 | { |
| 352 | |
| 353 | #ifdef COMPAT_50 |
| 354 | if (PUFFSOP_OPCLASS(preq->preq_opclass) == PUFFSOP_VFS |
| 355 | && preq->preq_optype == PUFFS_VFS_FHTOVP) { |
| 356 | INIT(vfsmsg_fhtonode); |
| 357 | |
| 358 | ASSIGN(pvfsr_pr); |
| 359 | |
| 360 | ASSIGN(pvfsr_fhcookie); |
| 361 | ASSIGN(pvfsr_vtype); |
| 362 | ASSIGN(pvfsr_size); |
| 363 | ASSIGN(pvfsr_rdev); |
| 364 | } else if (PUFFSOP_OPCLASS(preq->preq_opclass) == PUFFSOP_VN) { |
| 365 | switch (preq->preq_optype) { |
| 366 | case PUFFS_VN_LOOKUP: |
| 367 | { |
| 368 | INIT(vnmsg_lookup); |
| 369 | |
| 370 | ASSIGN(pvn_pr); |
| 371 | ASSIGN(pvnr_newnode); |
| 372 | ASSIGN(pvnr_vtype); |
| 373 | ASSIGN(pvnr_size); |
| 374 | ASSIGN(pvnr_rdev); |
| 375 | |
| 376 | break; |
| 377 | } |
| 378 | |
| 379 | case PUFFS_VN_CREATE: |
| 380 | { |
| 381 | INIT(vnmsg_create); |
| 382 | |
| 383 | ASSIGN(pvn_pr); |
| 384 | ASSIGN(pvnr_newnode); |
| 385 | |
| 386 | break; |
| 387 | } |
| 388 | |
| 389 | case PUFFS_VN_MKNOD: |
| 390 | { |
| 391 | INIT(vnmsg_mknod); |
| 392 | |
| 393 | ASSIGN(pvn_pr); |
| 394 | ASSIGN(pvnr_newnode); |
| 395 | |
| 396 | break; |
| 397 | } |
| 398 | |
| 399 | case PUFFS_VN_MKDIR: |
| 400 | { |
| 401 | INIT(vnmsg_mkdir); |
| 402 | |
| 403 | ASSIGN(pvn_pr); |
| 404 | ASSIGN(pvnr_newnode); |
| 405 | |
| 406 | break; |
| 407 | } |
| 408 | |
| 409 | case PUFFS_VN_SYMLINK: |
| 410 | { |
| 411 | INIT(vnmsg_symlink); |
| 412 | |
| 413 | ASSIGN(pvn_pr); |
| 414 | ASSIGN(pvnr_newnode); |
| 415 | |
| 416 | break; |
| 417 | } |
| 418 | |
| 419 | case PUFFS_VN_SETATTR: |
| 420 | { |
| 421 | INIT(vnmsg_setattr); |
| 422 | |
| 423 | ASSIGN(pvn_pr); |
| 424 | |
| 425 | break; |
| 426 | } |
| 427 | case PUFFS_VN_GETATTR: |
| 428 | { |
| 429 | INIT(vnmsg_getattr); |
| 430 | |
| 431 | ASSIGN(pvn_pr); |
| 432 | vattr_from_50(&cmsg->pvnr_va, &omsg->pvnr_va); |
| 433 | |
| 434 | break; |
| 435 | } |
| 436 | |
| 437 | default: |
| 438 | panic("puffs compat ops come in pairs" ); |
| 439 | } |
| 440 | } |
| 441 | #endif /* COMPAT_50 */ |
| 442 | } |
| 443 | |