puffs_vnops.c revision 1.22
1 /* $NetBSD: puffs_vnops.c,v 1.22 2006/12/09 16:11:51 chs Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006 Antti Kantee. All Rights Reserved. 5 * 6 * Development of this software was supported by the 7 * Google Summer of Code program and the Ulla Tuominen Foundation. 8 * The Google SoC project was mentored by Bill Studenmund. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the company nor the name of the author may be used to 19 * endorse or promote products derived from this software without specific 20 * prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 23 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 25 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.22 2006/12/09 16:11:51 chs Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/vnode.h> 40 #include <sys/mount.h> 41 #include <sys/malloc.h> 42 #include <sys/namei.h> 43 44 #include <fs/puffs/puffs_msgif.h> 45 #include <fs/puffs/puffs_sys.h> 46 47 #include <miscfs/fifofs/fifo.h> 48 #include <miscfs/genfs/genfs.h> 49 #include <miscfs/specfs/specdev.h> 50 51 int puffs_lookup(void *); 52 int puffs_create(void *); 53 int puffs_access(void *); 54 int puffs_mknod(void *); 55 int puffs_open(void *); 56 int puffs_close(void *); 57 int puffs_getattr(void *); 58 int puffs_setattr(void *); 59 int puffs_revoke(void *); 60 int puffs_reclaim(void *); 61 int puffs_readdir(void *); 62 int puffs_poll(void *); 63 int puffs_fsync(void *); 64 int puffs_seek(void *); 65 int puffs_remove(void *); 66 int puffs_mkdir(void *); 67 int puffs_rmdir(void *); 68 int puffs_link(void *); 69 int puffs_readlink(void *); 70 int puffs_symlink(void *); 71 int puffs_rename(void *); 72 int puffs_read(void *); 73 int puffs_write(void *); 74 int puffs_fcntl(void *); 75 int puffs_ioctl(void *); 76 int puffs_inactive(void *); 77 int puffs_print(void *); 78 int puffs_pathconf(void *); 79 int puffs_advlock(void *); 80 int puffs_strategy(void *); 81 int puffs_bmap(void *); 82 int puffs_mmap(void *); 83 84 int puffs_checkop(void *); 85 86 87 /* VOP_LEASE() not included */ 88 89 int puffs_generic(void *); 90 91 #if 0 92 #define puffs_lock genfs_lock 93 #define puffs_unlock genfs_unlock 94 #define puffs_islocked genfs_islocked 95 #else 96 int puffs_lock(void *); 97 int puffs_unlock(void *); 98 int puffs_islocked(void *); 99 #endif 100 101 /* 102 * no special specops for now. hmm, probably don't want to handle 103 * these synchronously, since they don't actually demand any 104 * response. so maybe we need another touser-type thing... 105 */ 106 #define puffsspec_read spec_read 107 #define puffsspec_write spec_write 108 #define puffsspec_close spec_close 109 /* no special fifo-ooops either */ 110 #define puffsfifo_read fifo_read 111 #define puffsfifo_write fifo_write 112 #define puffsfifo_close fifo_close 113 114 int (**puffs_vnodeop_p)(void *); 115 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 116 { &vop_default_desc, vn_default_error }, 117 { &vop_lookup_desc, puffs_lookup }, /* REAL lookup */ 118 { &vop_create_desc, puffs_checkop }, /* create */ 119 { &vop_mknod_desc, puffs_checkop }, /* mknod */ 120 { &vop_open_desc, puffs_checkop }, /* open */ 121 { &vop_close_desc, puffs_checkop }, /* close */ 122 { &vop_access_desc, puffs_checkop }, /* access */ 123 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 124 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 125 { &vop_read_desc, puffs_checkop }, /* read */ 126 { &vop_write_desc, puffs_checkop }, /* write */ 127 { &vop_fcntl_desc, puffs_checkop }, /* fcntl */ 128 { &vop_ioctl_desc, puffs_checkop }, /* ioctl */ 129 { &vop_fsync_desc, puffs_checkop }, /* fsync */ 130 { &vop_seek_desc, puffs_checkop }, /* seek */ 131 { &vop_remove_desc, puffs_checkop }, /* remove */ 132 { &vop_link_desc, puffs_checkop }, /* link */ 133 { &vop_rename_desc, puffs_checkop }, /* rename */ 134 { &vop_mkdir_desc, puffs_checkop }, /* mkdir */ 135 { &vop_rmdir_desc, puffs_checkop }, /* rmdir */ 136 { &vop_symlink_desc, puffs_checkop }, /* symlink */ 137 { &vop_readdir_desc, puffs_checkop }, /* readdir */ 138 { &vop_readlink_desc, puffs_checkop }, /* readlink */ 139 { &vop_getpages_desc, puffs_checkop }, /* getpages */ 140 { &vop_putpages_desc, puffs_checkop }, /* putpages */ 141 { &vop_pathconf_desc, puffs_checkop }, /* pathconf */ 142 { &vop_advlock_desc, puffs_checkop }, /* advlock */ 143 { &vop_strategy_desc, puffs_strategy }, /* REAL strategy */ 144 { &vop_revoke_desc, puffs_revoke }, /* REAL revoke */ 145 { &vop_abortop_desc, genfs_abortop }, /* REAL abortop */ 146 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 147 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 148 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 149 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 150 { &vop_bmap_desc, puffs_bmap }, /* REAL bmap */ 151 { &vop_print_desc, puffs_print }, /* REAL print */ 152 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 153 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 154 { &vop_mmap_desc, puffs_mmap }, /* REAL mmap */ 155 156 { &vop_poll_desc, genfs_eopnotsupp }, /* poll XXX */ 157 { &vop_poll_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 158 { NULL, NULL } 159 }; 160 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 161 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 162 163 164 int (**puffs_specop_p)(void *); 165 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 166 { &vop_default_desc, vn_default_error }, 167 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 168 { &vop_create_desc, spec_create }, /* genfs_badop */ 169 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 170 { &vop_open_desc, spec_open }, /* spec_open */ 171 { &vop_close_desc, puffsspec_close }, /* close */ 172 { &vop_access_desc, puffs_access }, /* access */ 173 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 174 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 175 { &vop_read_desc, puffsspec_read }, /* read */ 176 { &vop_write_desc, puffsspec_write }, /* write */ 177 { &vop_lease_desc, spec_lease_check }, /* genfs_nullop */ 178 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 179 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 180 { &vop_poll_desc, spec_poll }, /* spec_poll */ 181 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 182 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 183 { &vop_mmap_desc, spec_mmap }, /* genfs_mmap (dummy) */ 184 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 185 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 186 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 187 { &vop_link_desc, spec_link }, /* genfs_badop */ 188 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 189 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 190 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 191 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 192 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 193 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 194 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 195 { &vop_inactive_desc, puffs_inactive }, /* inactive */ 196 { &vop_reclaim_desc, puffs_reclaim }, /* reclaim */ 197 { &vop_lock_desc, puffs_lock }, /* lock */ 198 { &vop_unlock_desc, puffs_unlock }, /* unlock */ 199 { &vop_bmap_desc, spec_bmap }, /* dummy */ 200 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 201 { &vop_print_desc, puffs_print }, /* print */ 202 { &vop_islocked_desc, puffs_islocked }, /* islocked */ 203 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 204 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 205 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 206 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 207 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 208 #if 0 209 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 210 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 211 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 212 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 213 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 214 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 215 #endif 216 { NULL, NULL } 217 }; 218 const struct vnodeopv_desc puffs_specop_opv_desc = 219 { &puffs_specop_p, puffs_specop_entries }; 220 221 int (**puffs_fifoop_p)(void *); 222 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 223 { &vop_default_desc, vn_default_error }, 224 { &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */ 225 { &vop_create_desc, fifo_create }, /* genfs_badop */ 226 { &vop_mknod_desc, fifo_mknod }, /* genfs_badop */ 227 { &vop_open_desc, fifo_open }, /* open */ 228 { &vop_close_desc, puffsfifo_close }, /* close */ 229 { &vop_access_desc, puffs_access }, /* access */ 230 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 231 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 232 { &vop_read_desc, puffsfifo_read }, /* read */ 233 { &vop_write_desc, puffsfifo_write }, /* write */ 234 { &vop_lease_desc, fifo_lease_check }, /* genfs_nullop */ 235 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 236 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 237 { &vop_poll_desc, fifo_poll }, /* poll */ 238 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 239 { &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */ 240 { &vop_mmap_desc, fifo_mmap }, /* genfs_badop */ 241 { &vop_fsync_desc, puffs_fsync }, /* fsync */ 242 { &vop_seek_desc, fifo_seek }, /* genfs_badop */ 243 { &vop_remove_desc, fifo_remove }, /* genfs_badop */ 244 { &vop_link_desc, fifo_link }, /* genfs_badop */ 245 { &vop_rename_desc, fifo_rename }, /* genfs_badop */ 246 { &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */ 247 { &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */ 248 { &vop_symlink_desc, fifo_symlink }, /* genfs_badop */ 249 { &vop_readdir_desc, fifo_readdir }, /* genfs_badop */ 250 { &vop_readlink_desc, fifo_readlink }, /* genfs_badop */ 251 { &vop_abortop_desc, fifo_abortop }, /* genfs_badop */ 252 { &vop_inactive_desc, puffs_inactive }, /* inactive */ 253 { &vop_reclaim_desc, puffs_reclaim }, /* reclaim */ 254 { &vop_lock_desc, puffs_lock }, /* lock */ 255 { &vop_unlock_desc, puffs_unlock }, /* unlock */ 256 { &vop_bmap_desc, fifo_bmap }, /* dummy */ 257 { &vop_strategy_desc, fifo_strategy }, /* genfs_badop */ 258 { &vop_print_desc, puffs_print }, /* print */ 259 { &vop_islocked_desc, puffs_islocked }, /* islocked */ 260 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 261 { &vop_advlock_desc, fifo_advlock }, /* genfs_einval */ 262 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 263 { &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/ 264 #if 0 265 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 266 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 267 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 268 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 269 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 270 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 271 #endif 272 { NULL, NULL } 273 }; 274 const struct vnodeopv_desc puffs_fifoop_opv_desc = 275 { &puffs_fifoop_p, puffs_fifoop_entries }; 276 277 278 /* "real" vnode operations */ 279 int (**puffs_msgop_p)(void *); 280 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 281 { &vop_default_desc, vn_default_error }, 282 { &vop_create_desc, puffs_create }, /* create */ 283 { &vop_mknod_desc, puffs_mknod }, /* mknod */ 284 { &vop_open_desc, puffs_open }, /* open */ 285 { &vop_close_desc, puffs_close }, /* close */ 286 { &vop_access_desc, puffs_access }, /* access */ 287 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 288 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 289 { &vop_read_desc, puffs_read }, /* read */ 290 { &vop_write_desc, puffs_write }, /* write */ 291 { &vop_fcntl_desc, puffs_fcntl }, /* fcntl */ 292 { &vop_ioctl_desc, puffs_ioctl }, /* ioctl */ 293 { &vop_fsync_desc, puffs_fsync }, /* fsync */ 294 { &vop_seek_desc, puffs_seek }, /* seek */ 295 { &vop_remove_desc, puffs_remove }, /* remove */ 296 { &vop_link_desc, puffs_link }, /* link */ 297 { &vop_rename_desc, puffs_rename }, /* rename */ 298 { &vop_mkdir_desc, puffs_mkdir }, /* mkdir */ 299 { &vop_rmdir_desc, puffs_rmdir }, /* rmdir */ 300 { &vop_symlink_desc, puffs_symlink }, /* symlink */ 301 { &vop_readdir_desc, puffs_readdir }, /* readdir */ 302 { &vop_readlink_desc, puffs_readlink }, /* readlink */ 303 { &vop_print_desc, puffs_print }, /* print */ 304 { &vop_islocked_desc, puffs_islocked }, /* islocked */ 305 { &vop_pathconf_desc, puffs_pathconf }, /* pathconf */ 306 { &vop_advlock_desc, puffs_advlock }, /* advlock */ 307 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 308 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 309 { NULL, NULL } 310 }; 311 const struct vnodeopv_desc puffs_msgop_opv_desc = 312 { &puffs_msgop_p, puffs_msgop_entries }; 313 314 315 #define LOCKEDVP(a) (VOP_ISLOCKED(a) ? (a) : NULL) 316 317 318 /* 319 * This is a generic vnode operation handler. It checks if the necessary 320 * operations for the called vnode operation are implemented by userspace 321 * and either returns a dummy return value or proceeds to call the real 322 * vnode operation from puffs_msgop_v. 323 * 324 * XXX: this should described elsewhere and autogenerated, the complexity 325 * of the vnode operations vectors and their interrelationships is also 326 * getting a bit out of hand. Another problem is that we need this same 327 * information in the fs server code, so keeping the two in sync manually 328 * is not a viable (long term) plan. 329 */ 330 331 /* not supported, handle locking protocol */ 332 #define CHECKOP_NOTSUPP(op) \ 333 case VOP_##op##_DESCOFFSET: \ 334 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 335 return genfs_eopnotsupp(v); \ 336 break 337 338 /* always succeed, no locking */ 339 #define CHECKOP_SUCCESS(op) \ 340 case VOP_##op##_DESCOFFSET: \ 341 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 342 return 0; \ 343 break 344 345 int 346 puffs_checkop(void *v) 347 { 348 struct vop_generic_args /* { 349 struct vnodeop_desc *a_desc; 350 spooky mystery contents; 351 } */ *ap = v; 352 struct vnodeop_desc *desc = ap->a_desc; 353 struct puffs_mount *pmp; 354 struct vnode *vp; 355 int offset; 356 357 DPRINTF_VERBOSE(("checkop call %s (%d)\n", 358 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset)); 359 360 offset = ap->a_desc->vdesc_vp_offsets[0]; 361 #ifdef DIAGNOSTIC 362 if (offset == VDESC_NO_OFFSET) 363 panic("puffs_checkop: no vnode, why did you call me?"); 364 #endif 365 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 366 pmp = MPTOPUFFSMP(vp->v_mount); 367 368 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOPS) == 0) { 369 switch (desc->vdesc_offset) { 370 CHECKOP_NOTSUPP(CREATE); 371 CHECKOP_NOTSUPP(MKNOD); 372 CHECKOP_NOTSUPP(GETATTR); 373 CHECKOP_NOTSUPP(SETATTR); 374 CHECKOP_NOTSUPP(READ); 375 CHECKOP_NOTSUPP(WRITE); 376 CHECKOP_NOTSUPP(FCNTL); 377 CHECKOP_NOTSUPP(IOCTL); 378 CHECKOP_NOTSUPP(REMOVE); 379 CHECKOP_NOTSUPP(LINK); 380 CHECKOP_NOTSUPP(RENAME); 381 CHECKOP_NOTSUPP(MKDIR); 382 CHECKOP_NOTSUPP(RMDIR); 383 CHECKOP_NOTSUPP(SYMLINK); 384 CHECKOP_NOTSUPP(READDIR); 385 CHECKOP_NOTSUPP(READLINK); 386 CHECKOP_NOTSUPP(PRINT); 387 CHECKOP_NOTSUPP(PATHCONF); 388 CHECKOP_NOTSUPP(ADVLOCK); 389 390 CHECKOP_SUCCESS(OPEN); 391 CHECKOP_SUCCESS(CLOSE); 392 CHECKOP_SUCCESS(ACCESS); 393 CHECKOP_SUCCESS(SEEK); 394 395 /* putpages & fsync doesn't make sense if there's no write */ 396 case VOP_FSYNC_DESCOFFSET: 397 if (!EXISTSOP(pmp, WRITE)) 398 return genfs_eopnotsupp(v); 399 break; 400 401 case VOP_GETPAGES_DESCOFFSET: 402 if (!EXISTSOP(pmp, READ)) 403 return genfs_eopnotsupp(v); 404 break; 405 406 case VOP_PUTPAGES_DESCOFFSET: 407 if (!EXISTSOP(pmp, WRITE)) 408 return genfs_null_putpages(v); 409 break; 410 411 default: 412 panic("puffs_checkop: unhandled vnop %d", 413 desc->vdesc_offset); 414 } 415 } 416 417 return VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 418 } 419 420 421 int 422 puffs_lookup(void *v) 423 { 424 struct vop_lookup_args /* { 425 const struct vnodeop_desc *a_desc; 426 struct vnode *a_dvp; 427 struct vnode **a_vpp; 428 struct componentname *a_cnp; 429 } */ *ap = v; 430 struct puffs_mount *pmp; 431 struct componentname *cnp; 432 struct vnode *vp, *dvp; 433 int isdot; 434 int error; 435 436 PUFFS_VNREQ(lookup); 437 438 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 439 cnp = ap->a_cnp; 440 dvp = ap->a_dvp; 441 *ap->a_vpp = NULL; 442 443 /* first things first: check access */ 444 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 445 if (error) 446 return error; 447 448 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 449 450 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %lx\n", 451 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 452 453 /* 454 * Do sanity checks we can do without consulting userland. 455 */ 456 457 /* 458 * last component check & ro fs 459 * 460 * hmmm... why doesn't this check for create? 461 */ 462 if ((cnp->cn_flags & ISLASTCN) 463 && (ap->a_dvp->v_mount->mnt_flag & MNT_RDONLY) 464 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) { 465 DPRINTF(("puffs_lookup: write lookup for read-only fs!\n")); 466 return EROFS; 467 } 468 469 /* 470 * Check if someone fed it into the cache 471 */ 472 error = cache_lookup(dvp, ap->a_vpp, cnp); 473 if (error >= 0) 474 return error; 475 476 if (isdot) { 477 vp = ap->a_dvp; 478 vref(vp); 479 *ap->a_vpp = vp; 480 return 0; 481 } 482 483 puffs_makecn(&lookup_arg.pvnr_cn, cnp); 484 485 if (cnp->cn_flags & ISDOTDOT) 486 VOP_UNLOCK(dvp, 0); 487 488 error = puffs_vntouser(pmp, PUFFS_VN_LOOKUP, 489 &lookup_arg, sizeof(lookup_arg), VPTOPNC(dvp), LOCKEDVP(dvp), NULL); 490 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 491 492 /* 493 * In case of error, leave parent locked. There is no new 494 * vnode to play with, so be happy with the NULL value given 495 * to vpp in the beginning. 496 */ 497 if (error) { 498 if (error == ENOENT) { 499 if ((cnp->cn_flags & ISLASTCN) 500 && (cnp->cn_nameiop == CREATE 501 || cnp->cn_nameiop == RENAME)) { 502 cnp->cn_flags |= SAVENAME; 503 error = EJUSTRETURN; 504 } 505 } 506 *ap->a_vpp = NULL; 507 goto errout; 508 } 509 510 vp = puffs_pnode2vnode(pmp, lookup_arg.pvnr_newnode); 511 if (!vp) { 512 error = puffs_getvnode(dvp->v_mount, 513 lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype, 514 lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp); 515 if (error) { 516 goto errout; 517 } 518 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 519 } 520 521 if (cnp->cn_flags & MAKEENTRY) 522 cache_enter(dvp, vp, cnp); 523 *ap->a_vpp = vp; 524 525 errout: 526 if (cnp->cn_flags & ISDOTDOT) 527 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 528 529 return error; 530 } 531 532 int 533 puffs_create(void *v) 534 { 535 struct vop_create_args /* { 536 const struct vnodeop_desc *a_desc; 537 struct vnode *a_dvp; 538 struct vnode **a_vpp; 539 struct componentname *a_cnp; 540 struct vattr *a_vap; 541 } */ *ap = v; 542 int error; 543 544 PUFFS_VNREQ(create); 545 546 puffs_makecn(&create_arg.pvnr_cn, ap->a_cnp); 547 create_arg.pvnr_va = *ap->a_vap; 548 549 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_CREATE, 550 &create_arg, sizeof(create_arg), VPTOPNC(ap->a_dvp), 551 ap->a_dvp, NULL); 552 if (error) 553 goto out; 554 555 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 556 create_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 0); 557 558 out: 559 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 560 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 561 vput(ap->a_dvp); 562 return error; 563 } 564 565 int 566 puffs_mknod(void *v) 567 { 568 struct vop_mknod_args /* { 569 const struct vnodeop_desc *a_desc; 570 struct vnode *a_dvp; 571 struct vnode **a_vpp; 572 struct componentname *a_cnp; 573 struct vattr *a_vap; 574 } */ *ap = v; 575 int error; 576 577 PUFFS_VNREQ(mknod); 578 579 puffs_makecn(&mknod_arg.pvnr_cn, ap->a_cnp); 580 mknod_arg.pvnr_va = *ap->a_vap; 581 582 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKNOD, 583 &mknod_arg, sizeof(mknod_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 584 if (error) 585 goto out; 586 587 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 588 mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 589 ap->a_vap->va_rdev); 590 591 out: 592 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 593 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 594 vput(ap->a_dvp); 595 return error; 596 } 597 598 int 599 puffs_open(void *v) 600 { 601 struct vop_open_args /* { 602 const struct vnodeop_desc *a_desc; 603 struct vnode *a_vp; 604 int a_mode; 605 kauth_cred_t a_cred; 606 struct lwp *a_l; 607 } */ *ap = v; 608 609 PUFFS_VNREQ(open); 610 611 open_arg.pvnr_mode = ap->a_mode; 612 puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred); 613 open_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 614 615 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_OPEN, 616 &open_arg, sizeof(open_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 617 } 618 619 int 620 puffs_close(void *v) 621 { 622 struct vop_close_args /* { 623 const struct vnodeop_desc *a_desc; 624 struct vnode *a_vp; 625 int a_fflag; 626 kauth_cred_t a_cred; 627 struct lwp *a_l; 628 } */ *ap = v; 629 630 PUFFS_VNREQ(close); 631 632 close_arg.pvnr_fflag = ap->a_fflag; 633 puffs_credcvt(&close_arg.pvnr_cred, ap->a_cred); 634 close_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 635 636 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 637 &close_arg, sizeof(close_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 638 } 639 640 int 641 puffs_access(void *v) 642 { 643 struct vop_access_args /* { 644 const struct vnodeop_desc *a_desc; 645 struct vnode *a_vp; 646 int a_mode; 647 kauth_cred_t a_cred; 648 struct lwp *a_l; 649 } */ *ap = v; 650 651 PUFFS_VNREQ(access); 652 653 access_arg.pvnr_mode = ap->a_mode; 654 access_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 655 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 656 657 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ACCESS, 658 &access_arg, sizeof(access_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 659 } 660 661 int 662 puffs_getattr(void *v) 663 { 664 struct vop_getattr_args /* { 665 const struct vnodeop_desc *a_desc; 666 struct vnode *a_vp; 667 struct vattr *a_vap; 668 kauth_cred_t a_cred; 669 struct lwp *a_l; 670 } */ *ap = v; 671 struct mount *mp; 672 int error; 673 674 PUFFS_VNREQ(getattr); 675 676 mp = ap->a_vp->v_mount; 677 678 vattr_null(&getattr_arg.pvnr_va); 679 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 680 getattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 681 682 /* 683 * XXX + XX (dos equis): this can't go through the unlock/lock 684 * cycle, since it can be called from uvn_attach(), which fiddles 685 * around with VXLOCK and therefore breaks vn_lock(). Proper 686 * fix pending. 687 */ 688 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_GETATTR, 689 &getattr_arg, sizeof(getattr_arg), VPTOPNC(ap->a_vp), 690 NULL /* XXXseeabove: should be LOCKEDVP(ap->a_vp) */, NULL); 691 if (error) 692 return error; 693 694 (void)memcpy(ap->a_vap, &getattr_arg.pvnr_va, sizeof(struct vattr)); 695 696 /* 697 * fill in information userspace does not have 698 * XXX: but would it be better to do fsid at the generic level? 699 */ 700 ap->a_vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 701 702 return 0; 703 } 704 705 int 706 puffs_setattr(void *v) 707 { 708 struct vop_getattr_args /* { 709 const struct vnodeop_desc *a_desc; 710 struct vnode *a_vp; 711 struct vattr *a_vap; 712 kauth_cred_t a_cred; 713 struct lwp *a_l; 714 } */ *ap = v; 715 int error; 716 717 PUFFS_VNREQ(setattr); 718 719 (void)memcpy(&setattr_arg.pvnr_va, ap->a_vap, sizeof(struct vattr)); 720 puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred); 721 setattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 722 723 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR, 724 &setattr_arg, sizeof(setattr_arg), VPTOPNC(ap->a_vp), 725 ap->a_vp, NULL); 726 if (error) 727 return error; 728 729 if (ap->a_vap->va_size != VNOVAL) 730 uvm_vnp_setsize(ap->a_vp, ap->a_vap->va_size); 731 732 return 0; 733 } 734 735 int 736 puffs_revoke(void *v) 737 { 738 struct vop_revoke_args /* { 739 const struct vnodeop_desc *a_desc; 740 struct vnode *a_vp; 741 int a_flags; 742 } */ *ap = v; 743 struct puffs_mount *pmp; 744 745 PUFFS_VNREQ(revoke); 746 747 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 748 749 revoke_arg.pvnr_flags = ap->a_flags; 750 751 /* don't really care if userspace doesn't want to play along */ 752 if (EXISTSOP(pmp, REVOKE)) 753 puffs_vntouser(pmp, PUFFS_VN_REVOKE, 754 &revoke_arg, sizeof(revoke_arg), VPTOPNC(ap->a_vp), 755 NULL, NULL); 756 757 return genfs_revoke(v); 758 } 759 760 /* 761 * There is no technical need to have this travel to userspace 762 * synchronously. So once async reply support is in place, make this 763 * async. 764 */ 765 int 766 puffs_inactive(void *v) 767 { 768 struct vop_inactive_args /* { 769 const struct vnodeop_desc *a_desc; 770 struct vnode *a_vp; 771 struct lwp *a_l; 772 } */ *ap = v; 773 struct puffs_mount *pmp; 774 struct puffs_node *pnode; 775 int rv, vnrefs; 776 777 PUFFS_VNREQ(inactive); 778 779 /* 780 * XXX: think about this after we really start unlocking 781 * when going to userspace 782 */ 783 pnode = ap->a_vp->v_data; 784 pnode->pn_stat |= PNODE_INACTIVE; 785 786 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 787 788 inactive_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 789 790 if (EXISTSOP(pmp, INACTIVE)) 791 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 792 &inactive_arg, sizeof(inactive_arg), VPTOPNC(ap->a_vp), 793 ap->a_vp, NULL); 794 else 795 rv = 1; /* see below */ 796 797 /* can't trust userspace return value? simulate safe answer */ 798 if (rv) 799 vnrefs = 1; 800 else 801 vnrefs = inactive_arg.pvnr_backendrefs; 802 803 VOP_UNLOCK(ap->a_vp, 0); 804 805 /* 806 * user server thinks it's gone? then don't be afraid care, 807 * node's life was already all it would ever be 808 */ 809 if (vnrefs == 0) 810 vrecycle(ap->a_vp, NULL, ap->a_l); 811 812 return 0; 813 } 814 815 int 816 puffs_reclaim(void *v) 817 { 818 struct vop_reclaim_args /* { 819 const struct vnodeop_desc *a_desc; 820 struct vnode *a_vp; 821 struct lwp *a_l; 822 } */ *ap = v; 823 struct puffs_mount *pmp; 824 int error; 825 826 PUFFS_VNREQ(reclaim); 827 828 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 829 830 /* 831 * first things first: check if someone is trying to reclaim the 832 * root vnode. do not allow that to travel to userspace. 833 * Note that we don't need to take the lock similarly to 834 * puffs_root(), since there is only one of us. 835 */ 836 if (ap->a_vp->v_flag & VROOT) { 837 #ifdef DIAGNOSTIC 838 simple_lock(&pmp->pmp_lock); 839 if (pmp->pmp_root == NULL) 840 panic("puffs_reclaim: releasing root vnode (%p) twice", 841 ap->a_vp); 842 simple_unlock(&pmp->pmp_lock); 843 #endif 844 pmp->pmp_root = NULL; 845 puffs_putvnode(ap->a_vp); 846 return 0; 847 } 848 849 reclaim_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 850 851 if (EXISTSOP(pmp, RECLAIM)) 852 error = puffs_vntouser(pmp, PUFFS_VN_RECLAIM, 853 &reclaim_arg, sizeof(reclaim_arg), VPTOPNC(ap->a_vp), 854 NULL, NULL); 855 else 856 error = 0; 857 #if 0 858 /* 859 * XXX: if reclaim fails for any other reason than the userspace 860 * being dead, we should consider unmounting the filesystem, since 861 * we can't trust it to be in a consistent state anymore. But for 862 * now, just ignore all errors. 863 */ 864 if (error) 865 return error; 866 #endif 867 868 puffs_putvnode(ap->a_vp); 869 870 return 0; 871 } 872 873 int 874 puffs_readdir(void *v) 875 { 876 struct vop_readdir_args /* { 877 const struct vnodeop_desc *a_desc; 878 struct vnode *a_vp; 879 struct uio *a_uio; 880 kauth_cred_t a_cred; 881 int *a_eofflag; 882 off_t **a_cookies; 883 int *a_ncookies; 884 } */ *ap = v; 885 struct puffs_vnreq_readdir *readdir_argp; 886 size_t argsize; 887 struct uio *uio = ap->a_uio; 888 size_t howmuch; 889 int error; 890 891 /* worry about these later */ 892 if (!(ap->a_cookies == NULL && ap->a_ncookies == NULL)) 893 return EOPNOTSUPP; 894 895 argsize = sizeof(struct puffs_vnreq_readdir); 896 readdir_argp = malloc(argsize, M_PUFFS, M_ZERO | M_WAITOK); 897 898 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 899 readdir_argp->pvnr_offset = uio->uio_offset; 900 readdir_argp->pvnr_resid = uio->uio_resid; 901 902 error = puffs_vntouser_adjbuf(MPTOPUFFSMP(ap->a_vp->v_mount), 903 PUFFS_VN_READDIR, (void **)&readdir_argp, &argsize, 904 readdir_argp->pvnr_resid, VPTOPNC(ap->a_vp), ap->a_vp, NULL); 905 if (error) 906 goto out; 907 908 /* userspace is cheating? */ 909 if (readdir_argp->pvnr_resid > uio->uio_resid) { 910 error = EINVAL; 911 goto out; 912 } 913 914 /* bouncy-wouncy with the directory data */ 915 howmuch = uio->uio_resid - readdir_argp->pvnr_resid; 916 error = uiomove(readdir_argp->pvnr_dent, howmuch, uio); 917 if (error) 918 goto out; 919 uio->uio_offset = readdir_argp->pvnr_offset; 920 921 out: 922 free(readdir_argp, M_PUFFS); 923 return error; 924 } 925 926 int 927 puffs_poll(void *v) 928 { 929 struct vop_poll_args /* { 930 const struct vnodeop_desc *a_desc; 931 struct vnode *a_vp; 932 int a_events; 933 struct lwp *a_l; 934 }*/ *ap = v; 935 936 PUFFS_VNREQ(poll); 937 938 poll_arg.pvnr_events = ap->a_events; 939 poll_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 940 941 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_POLL, 942 &poll_arg, sizeof(poll_arg), VPTOPNC(ap->a_vp), NULL, NULL); 943 } 944 945 int 946 puffs_fsync(void *v) 947 { 948 struct vop_fsync_args /* { 949 const struct vnodeop_desc *a_desc; 950 struct vnode *a_vp; 951 kauth_cred_t a_cred; 952 int a_flags; 953 off_t a_offlo; 954 off_t a_offhi; 955 struct lwp *a_l; 956 } */ *ap = v; 957 struct puffs_vnreq_fsync *fsync_argp; 958 struct vnode *vp; 959 int pflags, error; 960 961 PUFFS_VNREQ(fsync); 962 963 vp = ap->a_vp; 964 965 pflags = PGO_CLEANIT; 966 if (ap->a_flags & FSYNC_WAIT) { 967 pflags |= PGO_SYNCIO; 968 fsync_argp = &fsync_arg; 969 } else { 970 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 971 M_PUFFS, M_ZERO | M_NOWAIT); 972 if (fsync_argp == NULL) 973 return ENOMEM; 974 } 975 976 /* 977 * flush pages to avoid being overly dirty 978 */ 979 simple_lock(&vp->v_interlock); 980 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 981 round_page(ap->a_offhi), pflags); 982 if (error) 983 return error; 984 985 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 986 fsync_argp->pvnr_flags = ap->a_flags; 987 fsync_argp->pvnr_offlo = ap->a_offlo; 988 fsync_argp->pvnr_offhi = ap->a_offhi; 989 fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 990 991 /* 992 * XXX: see comment at puffs_getattr about locking 993 * 994 * If we are not required to wait, do a FAF operation. 995 * Otherwise block here. 996 */ 997 if (ap->a_flags & FSYNC_WAIT) { 998 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 999 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 1000 VPTOPNC(vp), NULL /* XXXshouldbe: vp */, NULL); 1001 } else { 1002 /* FAF is always "succesful" */ 1003 error = 0; 1004 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1005 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 1006 VPTOPNC(vp)); 1007 } 1008 1009 return error; 1010 } 1011 1012 int 1013 puffs_seek(void *v) 1014 { 1015 struct vop_seek_args /* { 1016 const struct vnodeop_desc *a_desc; 1017 struct vnode *a_vp; 1018 off_t a_oldoff; 1019 off_t a_newoff; 1020 kauth_cred_t a_cred; 1021 } */ *ap = v; 1022 1023 PUFFS_VNREQ(seek); 1024 1025 seek_arg.pvnr_oldoff = ap->a_oldoff; 1026 seek_arg.pvnr_newoff = ap->a_newoff; 1027 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1028 1029 /* 1030 * XXX: seems like seek is called with an unlocked vp, but 1031 * it can't hurt to play safe 1032 */ 1033 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1034 &seek_arg, sizeof(seek_arg), VPTOPNC(ap->a_vp), 1035 LOCKEDVP(ap->a_vp), NULL); 1036 } 1037 1038 int 1039 puffs_remove(void *v) 1040 { 1041 struct vop_remove_args /* { 1042 const struct vnodeop_desc *a_desc; 1043 struct vnode *a_dvp; 1044 struct vnode *a_vp; 1045 struct componentname *a_cnp; 1046 } */ *ap = v; 1047 int error; 1048 1049 PUFFS_VNREQ(remove); 1050 1051 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1052 puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp); 1053 1054 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE, 1055 &remove_arg, sizeof(remove_arg), VPTOPNC(ap->a_dvp), 1056 ap->a_dvp, ap->a_vp); 1057 1058 vput(ap->a_vp); 1059 vput(ap->a_dvp); 1060 1061 return error; 1062 } 1063 1064 int 1065 puffs_mkdir(void *v) 1066 { 1067 struct vop_mkdir_args /* { 1068 const struct vnodeop_desc *a_desc; 1069 struct vnode *a_dvp; 1070 struct vnode **a_vpp; 1071 struct componentname *a_cnp; 1072 struct vattr *a_vap; 1073 } */ *ap = v; 1074 int error; 1075 1076 PUFFS_VNREQ(mkdir); 1077 1078 puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp); 1079 mkdir_arg.pvnr_va = *ap->a_vap; 1080 1081 /* XXX: wouldn't need to relock dvp, but that's life */ 1082 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR, 1083 &mkdir_arg, sizeof(mkdir_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1084 if (error) 1085 goto out; 1086 1087 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1088 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1089 1090 out: 1091 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1092 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1093 vput(ap->a_dvp); 1094 return error; 1095 } 1096 1097 int 1098 puffs_rmdir(void *v) 1099 { 1100 struct vop_rmdir_args /* { 1101 const struct vnodeop_desc *a_desc; 1102 struct vnode *a_dvp; 1103 struct vnode *a_vp; 1104 struct componentname *a_cnp; 1105 } */ *ap = v; 1106 int error; 1107 1108 PUFFS_VNREQ(rmdir); 1109 1110 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1111 puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp); 1112 1113 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR, 1114 &rmdir_arg, sizeof(rmdir_arg), VPTOPNC(ap->a_dvp), 1115 ap->a_dvp, ap->a_vp); 1116 1117 vput(ap->a_dvp); 1118 vput(ap->a_vp); 1119 1120 return error; 1121 } 1122 1123 int 1124 puffs_link(void *v) 1125 { 1126 struct vop_link_args /* { 1127 const struct vnodeop_desc *a_desc; 1128 struct vnode *a_dvp; 1129 struct vnode *a_vp; 1130 struct componentname *a_cnp; 1131 }*/ *ap = v; 1132 int error; 1133 1134 PUFFS_VNREQ(link); 1135 1136 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1137 puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp); 1138 1139 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK, 1140 &link_arg, sizeof(link_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1141 1142 vput(ap->a_dvp); 1143 1144 return error; 1145 } 1146 1147 int 1148 puffs_symlink(void *v) 1149 { 1150 struct vop_symlink_args /* { 1151 const struct vnodeop_desc *a_desc; 1152 struct vnode *a_dvp; 1153 struct vnode **a_vpp; 1154 struct componentname *a_cnp; 1155 struct vattr *a_vap; 1156 char *a_target; 1157 }*/ *ap = v; 1158 int error; 1159 1160 PUFFS_VNREQ(symlink); /* XXX: large structure */ 1161 1162 *ap->a_vpp = NULL; 1163 1164 puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp); 1165 symlink_arg.pvnr_va = *ap->a_vap; 1166 (void)strlcpy(symlink_arg.pvnr_link, ap->a_target, 1167 sizeof(symlink_arg.pvnr_link)); 1168 1169 /* XXX: don't need to relock parent */ 1170 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), 1171 PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg), 1172 VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1173 if (error) 1174 goto out; 1175 1176 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1177 symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0); 1178 1179 out: 1180 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1181 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1182 vput(ap->a_dvp); 1183 return error; 1184 } 1185 1186 int 1187 puffs_readlink(void *v) 1188 { 1189 struct vop_readlink_args /* { 1190 const struct vnodeop_desc *a_desc; 1191 struct vnode *a_vp; 1192 struct uio *a_uio; 1193 kauth_cred_t a_cred; 1194 } */ *ap = v; 1195 int error; 1196 1197 PUFFS_VNREQ(readlink); 1198 1199 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1200 readlink_arg.pvnr_linklen = sizeof(readlink_arg.pvnr_link); 1201 1202 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1203 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 1204 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1205 if (error) 1206 return error; 1207 1208 readlink_arg.pvnr_link[readlink_arg.pvnr_linklen] = '\0'; 1209 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1210 ap->a_uio); 1211 } 1212 1213 /* XXXXXXX: think about locking & userspace op delocking... */ 1214 int 1215 puffs_rename(void *v) 1216 { 1217 struct vop_rename_args /* { 1218 const struct vnodeop_desc *a_desc; 1219 struct vnode *a_fdvp; 1220 struct vnode *a_fvp; 1221 struct componentname *a_fcnp; 1222 struct vnode *a_tdvp; 1223 struct vnode *a_tvp; 1224 struct componentname *a_tcnp; 1225 }*/ *ap = v; 1226 int error; 1227 1228 PUFFS_VNREQ(rename); 1229 1230 /* 1231 * participate in the duck hunt 1232 * (I could do with some canard a la presse, so hopefully 1233 * this is succesful) 1234 */ 1235 KASSERT(ap->a_tdvp != ap->a_tvp); 1236 1237 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) { 1238 error = EXDEV; 1239 goto out; 1240 } 1241 1242 rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1243 rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1244 if (ap->a_tvp) 1245 rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1246 else 1247 rename_arg.pvnr_cookie_targ = NULL; 1248 puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp); 1249 puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp); 1250 1251 error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount), 1252 PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg), 1253 VPTOPNC(ap->a_fdvp), NULL, NULL); 1254 1255 out: 1256 vput(ap->a_tdvp); 1257 if (ap->a_tvp != NULL) 1258 vput(ap->a_tvp); 1259 1260 vrele(ap->a_fdvp); 1261 vrele(ap->a_fvp); 1262 1263 return error; 1264 } 1265 1266 int 1267 puffs_read(void *v) 1268 { 1269 struct vop_read_args /* { 1270 const struct vnodeop_desc *a_desc; 1271 struct vnode *a_vp; 1272 struct uio *a_uio; 1273 int a_ioflag; 1274 kauth_cred_t a_cred; 1275 } */ *ap = v; 1276 struct puffs_vnreq_read *read_argp; 1277 struct puffs_mount *pmp; 1278 struct vnode *vp; 1279 struct uio *uio; 1280 void *win; 1281 size_t tomove, argsize; 1282 vsize_t bytelen; 1283 int error, ubcflags; 1284 1285 uio = ap->a_uio; 1286 vp = ap->a_vp; 1287 read_argp = NULL; 1288 error = 0; 1289 pmp = MPTOPUFFSMP(vp->v_mount); 1290 1291 /* std sanity */ 1292 if (uio->uio_resid == 0) 1293 return 0; 1294 if (uio->uio_offset < 0) 1295 return EINVAL; 1296 1297 if (vp->v_type == VREG && (pmp->pmp_flags & PUFFS_KFLAG_NOCACHE) == 0) { 1298 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1299 1300 ubcflags = 0; 1301 if (UBC_WANT_UNMAP(vp)) 1302 ubcflags = UBC_UNMAP; 1303 1304 while (uio->uio_resid > 0) { 1305 bytelen = MIN(uio->uio_resid, 1306 vp->v_size - uio->uio_offset); 1307 if (bytelen == 0) 1308 break; 1309 1310 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1311 &bytelen, advice, UBC_READ); 1312 error = uiomove(win, bytelen, uio); 1313 ubc_release(win, ubcflags); 1314 if (error) 1315 break; 1316 } 1317 1318 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1319 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1320 } else { 1321 /* 1322 * in case it's not a regular file or we're operating 1323 * uncached, do read in the old-fashioned style, 1324 * i.e. explicit read operations 1325 */ 1326 1327 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1328 argsize = sizeof(struct puffs_vnreq_read); 1329 read_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1330 1331 error = 0; 1332 while (uio->uio_resid > 0) { 1333 read_argp->pvnr_ioflag = ap->a_ioflag; 1334 read_argp->pvnr_resid = tomove; 1335 read_argp->pvnr_offset = uio->uio_offset; 1336 puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred); 1337 1338 argsize = sizeof(struct puffs_vnreq_read); 1339 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1340 (void **)&read_argp, &argsize, 1341 read_argp->pvnr_resid, VPTOPNC(ap->a_vp), 1342 ap->a_vp, NULL); 1343 if (error) 1344 break; 1345 1346 if (read_argp->pvnr_resid > tomove) { 1347 error = EINVAL; 1348 break; 1349 } 1350 1351 error = uiomove(read_argp->pvnr_data, 1352 tomove - read_argp->pvnr_resid, uio); 1353 1354 /* 1355 * in case the file is out of juice, resid from 1356 * userspace is != 0. and the error-case is 1357 * quite obvious 1358 */ 1359 if (error || read_argp->pvnr_resid) 1360 break; 1361 1362 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1363 } 1364 } 1365 1366 if (read_argp) 1367 free(read_argp, M_PUFFS); 1368 return error; 1369 } 1370 1371 int 1372 puffs_write(void *v) 1373 { 1374 struct vop_write_args /* { 1375 const struct vnodeop_desc *a_desc; 1376 struct vnode *a_vp; 1377 struct uio *a_uio; 1378 int a_ioflag; 1379 kauth_cred_t a_cred; 1380 }*/ *ap = v; 1381 struct puffs_vnreq_write *write_argp; 1382 struct puffs_mount *pmp; 1383 struct uio *uio; 1384 struct vnode *vp; 1385 void *win; 1386 size_t tomove, argsize; 1387 off_t oldoff, newoff, origoff; 1388 vsize_t bytelen; 1389 int error, uflags; 1390 int async, ubcflags; 1391 1392 vp = ap->a_vp; 1393 uio = ap->a_uio; 1394 async = vp->v_mount->mnt_flag & MNT_ASYNC; 1395 error = uflags = 0; 1396 write_argp = NULL; 1397 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1398 1399 if (vp->v_type == VREG && (pmp->pmp_flags & PUFFS_KFLAG_NOCACHE) == 0) { 1400 ubcflags = 0; 1401 if (UBC_WANT_UNMAP(vp)) 1402 ubcflags = UBC_UNMAP; 1403 1404 /* 1405 * userspace *should* be allowed to control this, 1406 * but with UBC it's a bit unclear how to handle it 1407 */ 1408 if (ap->a_ioflag & IO_APPEND) 1409 uio->uio_offset = vp->v_size; 1410 1411 origoff = uio->uio_offset; 1412 while (uio->uio_resid > 0) { 1413 uflags |= PUFFS_UPDATECTIME; 1414 uflags |= PUFFS_UPDATEMTIME; 1415 oldoff = uio->uio_offset; 1416 bytelen = uio->uio_resid; 1417 1418 win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, 1419 UVM_ADV_NORMAL, UBC_WRITE); 1420 error = uiomove(win, bytelen, uio); 1421 1422 /* 1423 * did we grow the file? 1424 * XXX: should probably ask userspace to extend 1425 * it's idea of the *first* before growing it 1426 * here. Or we need some mechanism to "rollback" 1427 * in case putpages fails. 1428 */ 1429 newoff = oldoff + bytelen; 1430 if (vp->v_size < newoff) { 1431 uflags |= PUFFS_UPDATESIZE; 1432 uvm_vnp_setsize(vp, newoff); 1433 1434 /* 1435 * in case we couldn't copy data to the 1436 * window, zero it out so that we don't 1437 * have any random leftovers in there. 1438 */ 1439 if (error) 1440 memset(win, 0, bytelen); 1441 } 1442 1443 ubc_release(win, ubcflags); 1444 if (error) 1445 break; 1446 1447 /* ok, I really need to admit: why's this? */ 1448 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 1449 simple_lock(&vp->v_interlock); 1450 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1451 uio->uio_offset & ~0xffff, PGO_CLEANIT); 1452 if (error) 1453 break; 1454 } 1455 } 1456 1457 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1458 simple_lock(&vp->v_interlock); 1459 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1460 round_page(uio->uio_offset), 1461 PGO_CLEANIT | PGO_SYNCIO); 1462 } 1463 1464 puffs_updatenode(vp, uflags); 1465 } else { 1466 /* tomove is non-increasing */ 1467 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1468 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1469 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1470 1471 while (uio->uio_resid > 0) { 1472 write_argp->pvnr_ioflag = ap->a_ioflag; 1473 write_argp->pvnr_resid = tomove; 1474 write_argp->pvnr_offset = uio->uio_offset; 1475 puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred); 1476 error = uiomove(write_argp->pvnr_data, tomove, uio); 1477 if (error) 1478 break; 1479 1480 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1481 PUFFS_VN_WRITE, write_argp, argsize, 1482 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1483 if (error) { 1484 /* restore uiomove */ 1485 uio->uio_resid += tomove; 1486 uio->uio_offset -= tomove; 1487 break; 1488 } 1489 if (write_argp->pvnr_resid > tomove) { 1490 /* 1491 * XXX: correct file size is a mystery, 1492 * we can only guess 1493 */ 1494 error = EINVAL; 1495 break; 1496 } 1497 1498 /* adjust file size */ 1499 if (vp->v_size < uio->uio_offset) 1500 uvm_vnp_setsize(vp, uio->uio_offset); 1501 1502 /* didn't move everything? bad userspace. bail */ 1503 if (write_argp->pvnr_resid != 0) { 1504 uio->uio_resid += write_argp->pvnr_resid; 1505 uio->uio_offset -= write_argp->pvnr_resid; 1506 error = EIO; 1507 break; 1508 } 1509 1510 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1511 } 1512 } 1513 1514 if (write_argp) 1515 free(write_argp, M_PUFFS); 1516 return error; 1517 } 1518 1519 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1520 1521 #define FCNIOCTL_ARG_MAX 1<<16 1522 int 1523 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1524 { 1525 /* struct vop_ioctl_args { 1526 const struct vnodeop_desc *a_desc; 1527 struct vnode *a_vp; 1528 u_long a_command; 1529 void *a_data; 1530 int a_fflag; 1531 kauth_cred_t a_cred; 1532 struct lwp *a_l; 1533 }*ap = v; */ 1534 struct puffs_mount *pmp; 1535 struct puffs_sizepark pspark; 1536 void *kernbuf; 1537 size_t copylen; 1538 int error; 1539 1540 PUFFS_VNREQ(fcnioctl); 1541 1542 /* 1543 * Since this op gives the filesystem (almost) complete control on 1544 * how much it is allowed to copy from the calling process 1545 * address space, do not enable it by default, since it would 1546 * be a whopping security hole. 1547 */ 1548 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1549 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1550 return EINVAL; /* only shoe that fits */ 1551 1552 /* fill in sizereq and store it */ 1553 pspark.pkso_reqid = puffs_getreqid(pmp); 1554 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1555 pspark.pkso_copybuf = ap->a_data; 1556 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1557 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1558 1559 /* then fill in actual request and shoot it off */ 1560 fcnioctl_arg.pvnr_command = ap->a_command; 1561 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1562 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1563 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1564 1565 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1566 &fcnioctl_arg, sizeof(fcnioctl_arg), VPTOPNC(ap->a_vp), 1567 pspark.pkso_reqid, NULL, NULL); 1568 1569 /* if we don't need to copy data, we're done */ 1570 if (error || !fcnioctl_arg.pvnr_copyback) 1571 return error; 1572 1573 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1574 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1575 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1576 if (error) 1577 goto out; 1578 error = copyout(kernbuf, ap->a_data, copylen); 1579 1580 out: 1581 free(kernbuf, M_PUFFS); 1582 return error; 1583 } 1584 1585 int 1586 puffs_ioctl(void *v) 1587 { 1588 1589 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1590 } 1591 1592 int 1593 puffs_fcntl(void *v) 1594 { 1595 1596 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1597 } 1598 1599 int 1600 puffs_print(void *v) 1601 { 1602 struct vop_print_args /* { 1603 struct vnode *a_vp; 1604 } */ *ap = v; 1605 struct puffs_mount *pmp; 1606 struct vnode *vp = ap->a_vp; 1607 struct puffs_node *pn = vp->v_data; 1608 1609 PUFFS_VNREQ(print); 1610 1611 pmp = MPTOPUFFSMP(vp->v_mount); 1612 1613 /* kernel portion */ 1614 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1615 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1616 if (vp->v_type == VFIFO) 1617 fifo_printinfo(vp); 1618 lockmgr_printinfo(&vp->v_lock); 1619 1620 /* userspace portion */ 1621 if (EXISTSOP(pmp, PRINT)) 1622 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1623 &print_arg, sizeof(print_arg), VPTOPNC(ap->a_vp), 1624 LOCKEDVP(ap->a_vp), NULL); 1625 1626 return 0; 1627 } 1628 1629 int 1630 puffs_pathconf(void *v) 1631 { 1632 struct vop_pathconf_args /* { 1633 const struct vnodeop_desc *a_desc; 1634 struct vnode *a_vp; 1635 int a_name; 1636 register_t *a_retval; 1637 } */ *ap = v; 1638 int error; 1639 1640 PUFFS_VNREQ(pathconf); 1641 1642 pathconf_arg.pvnr_name = ap->a_name; 1643 1644 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1645 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 1646 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1647 if (error) 1648 return error; 1649 1650 *ap->a_retval = pathconf_arg.pvnr_retval; 1651 1652 return 0; 1653 } 1654 1655 int 1656 puffs_advlock(void *v) 1657 { 1658 struct vop_advlock_args /* { 1659 const struct vnodeop_desc *a_desc; 1660 struct vnode *a_vp; 1661 void *a_id; 1662 int a_op; 1663 struct flock *a_fl; 1664 int a_flags; 1665 } */ *ap = v; 1666 int error; 1667 1668 PUFFS_VNREQ(advlock); 1669 1670 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1671 if (error) 1672 return error; 1673 advlock_arg.pvnr_id = ap->a_id; 1674 advlock_arg.pvnr_op = ap->a_op; 1675 advlock_arg.pvnr_flags = ap->a_flags; 1676 1677 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1678 &advlock_arg, sizeof(advlock_arg), VPTOPNC(ap->a_vp), NULL, NULL); 1679 } 1680 /* 1681 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1682 */ 1683 int 1684 puffs_strategy(void *v) 1685 { 1686 struct vop_strategy_args /* { 1687 const struct vnodeop_desc *a_desc; 1688 struct vnode *a_vp; 1689 struct buf *a_bp; 1690 } */ *ap = v; 1691 struct puffs_mount *pmp; 1692 struct puffs_vnreq_read *read_argp = NULL; 1693 struct puffs_vnreq_write *write_argp = NULL; 1694 struct buf *bp; 1695 size_t argsize; 1696 size_t tomove, moved; 1697 int error; 1698 1699 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1700 bp = ap->a_bp; 1701 1702 if ((bp->b_flags & B_READ) && !EXISTSOP(pmp, READ)) 1703 return EOPNOTSUPP; 1704 if ((bp->b_flags & B_WRITE) && !EXISTSOP(pmp, WRITE)) 1705 return EOPNOTSUPP; 1706 1707 #ifdef DIAGNOSTIC 1708 if (bp->b_resid > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1709 panic("puffs_strategy: wildly inappropriate buf resid %d", 1710 bp->b_resid); 1711 #endif 1712 1713 if (bp->b_flags & B_READ) { 1714 argsize = sizeof(struct puffs_vnreq_read); 1715 read_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 1716 if (read_argp == NULL) { 1717 error = ENOMEM; 1718 goto out; 1719 } 1720 1721 tomove = PUFFS_TOMOVE(bp->b_resid, pmp); 1722 1723 read_argp->pvnr_ioflag = 0; 1724 read_argp->pvnr_resid = tomove; 1725 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1726 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1727 1728 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1729 (void **)&read_argp, &argsize, 1730 read_argp->pvnr_resid, VPTOPNC(ap->a_vp), 1731 LOCKEDVP(ap->a_vp), NULL); 1732 1733 if (error) 1734 goto out; 1735 1736 if (read_argp->pvnr_resid > tomove) { 1737 error = EINVAL; 1738 goto out; 1739 } 1740 1741 moved = tomove - read_argp->pvnr_resid; 1742 1743 (void)memcpy(bp->b_data, read_argp->pvnr_data, moved); 1744 bp->b_resid -= moved; 1745 } else { 1746 argsize = sizeof(struct puffs_vnreq_write) + bp->b_bcount; 1747 write_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 1748 if (write_argp == NULL) { 1749 error = ENOMEM; 1750 goto out; 1751 } 1752 1753 tomove = PUFFS_TOMOVE(bp->b_resid, pmp); 1754 1755 write_argp->pvnr_ioflag = 0; 1756 write_argp->pvnr_resid = tomove; 1757 write_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1758 puffs_credcvt(&write_argp->pvnr_cred, FSCRED); 1759 1760 (void)memcpy(&write_argp->pvnr_data, bp->b_data, tomove); 1761 1762 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1763 PUFFS_VN_WRITE, write_argp, argsize, 1764 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1765 if (error) 1766 goto out; 1767 1768 moved = write_argp->pvnr_resid - tomove; 1769 1770 if (write_argp->pvnr_resid > tomove) { 1771 error = EINVAL; 1772 goto out; 1773 } 1774 1775 bp->b_resid -= moved; 1776 if (write_argp->pvnr_resid != 0) 1777 error = EIO; 1778 } 1779 1780 out: 1781 if (read_argp) 1782 free(read_argp, M_PUFFS); 1783 if (write_argp) 1784 free(write_argp, M_PUFFS); 1785 1786 biodone(ap->a_bp); 1787 return error; 1788 } 1789 1790 int 1791 puffs_mmap(void *v) 1792 { 1793 struct vop_mmap_args /* { 1794 const struct vnodeop_desc *a_desc; 1795 struct vnode *a_vp; 1796 int a_fflags; 1797 kauth_cred_t a_cred; 1798 struct lwp *a_l; 1799 } */ *ap = v; 1800 struct puffs_mount *pmp; 1801 int error; 1802 1803 PUFFS_VNREQ(mmap); 1804 1805 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1806 1807 if (pmp->pmp_flags & PUFFS_KFLAG_NOCACHE) 1808 return genfs_eopnotsupp(v); 1809 1810 if (EXISTSOP(pmp, MMAP)) { 1811 mmap_arg.pvnr_fflags = ap->a_fflags; 1812 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 1813 mmap_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1814 1815 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 1816 &mmap_arg, sizeof(mmap_arg), 1817 VPTOPNC(ap->a_vp), NULL, NULL); 1818 } else { 1819 error = genfs_mmap(v); 1820 } 1821 1822 return error; 1823 } 1824 1825 1826 /* 1827 * The rest don't get a free trip to userspace and back, they 1828 * have to stay within the kernel. 1829 */ 1830 1831 /* 1832 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 1833 * well, maybe somehow, somewhere, some day .... 1834 */ 1835 int 1836 puffs_bmap(void *v) 1837 { 1838 struct vop_bmap_args /* { 1839 const struct vnodeop_desc *a_desc; 1840 struct vnode *a_vp; 1841 daddr_t a_bn; 1842 struct vnode **a_vpp; 1843 daddr_t *a_bnp; 1844 int *a_runp; 1845 } */ *ap = v; 1846 struct puffs_mount *pmp; 1847 1848 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1849 1850 if (ap->a_vpp) 1851 *ap->a_vpp = ap->a_vp; 1852 if (ap->a_bnp) 1853 *ap->a_bnp = ap->a_bn; 1854 if (ap->a_runp) 1855 *ap->a_runp = pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX; 1856 1857 return 0; 1858 } 1859 1860 /* 1861 * moreXXX: yes, todo 1862 */ 1863 int 1864 puffs_lock(void *v) 1865 { 1866 struct vop_lock_args /* { 1867 struct vnode *a_vp; 1868 int a_flags; 1869 }*/ *ap = v; 1870 struct vnode *vp = ap->a_vp; 1871 1872 #if 0 1873 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1874 #endif 1875 1876 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 1877 } 1878 1879 int 1880 puffs_unlock(void *v) 1881 { 1882 struct vop_unlock_args /* { 1883 struct vnode *a_vp; 1884 int a_flags; 1885 } */ *ap = v; 1886 struct vnode *vp = ap->a_vp; 1887 1888 #if 0 1889 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1890 #endif 1891 1892 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 1893 } 1894 1895 int 1896 puffs_islocked(void *v) 1897 { 1898 struct vop_islocked_args *ap = v; 1899 int rv; 1900 1901 rv = lockstatus(&ap->a_vp->v_lock); 1902 return rv; 1903 } 1904 1905 int 1906 puffs_generic(void *v) 1907 { 1908 struct vop_generic_args *ap = v; 1909 1910 (void)ap; 1911 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 1912 1913 return EOPNOTSUPP; 1914 } 1915
Indexes created Tue Sep 30 11:09:46 GMT 2025