puffs_vnops.c revision 1.20
1 /* $NetBSD: puffs_vnops.c,v 1.20 2006/12/05 23:07:42 pooka 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 1.20 2006/12/05 23:07:42 pooka 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 wantpunlock, 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 wantpunlock = ~cnp->cn_flags & (LOCKPARENT | ISLASTCN); 449 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 450 451 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %lx\n", 452 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 453 454 /* 455 * Do sanity checks we can do without consulting userland. 456 */ 457 458 /* 459 * last component check & ro fs 460 * 461 * hmmm... why doesn't this check for create? 462 */ 463 if ((cnp->cn_flags & ISLASTCN) 464 && (ap->a_dvp->v_mount->mnt_flag & MNT_RDONLY) 465 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) { 466 DPRINTF(("puffs_lookup: write lookup for read-only fs!\n")); 467 return EROFS; 468 } 469 470 /* 471 * Check if someone fed it into the cache 472 */ 473 error = cache_lookup(dvp, ap->a_vpp, cnp); 474 if (error >= 0) 475 return error; 476 477 if (isdot) { 478 vp = ap->a_dvp; 479 vref(vp); 480 *ap->a_vpp = vp; 481 return 0; 482 } 483 484 puffs_makecn(&lookup_arg.pvnr_cn, cnp); 485 486 if (cnp->cn_flags & ISDOTDOT) 487 VOP_UNLOCK(dvp, 0); 488 489 error = puffs_vntouser(pmp, PUFFS_VN_LOOKUP, 490 &lookup_arg, sizeof(lookup_arg), VPTOPNC(dvp), LOCKEDVP(dvp), NULL); 491 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 492 493 /* 494 * In case of error, leave parent locked. There is no new 495 * vnode to play with, so be happy with the NULL value given 496 * to vpp in the beginning. 497 */ 498 if (error) { 499 if (error == ENOENT) { 500 if ((cnp->cn_flags & ISLASTCN) 501 && (cnp->cn_nameiop == CREATE 502 || cnp->cn_nameiop == RENAME)) { 503 cnp->cn_flags |= SAVENAME; 504 error = EJUSTRETURN; 505 } 506 } 507 *ap->a_vpp = NULL; 508 if (cnp->cn_flags & ISDOTDOT) 509 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) != 0) 510 cnp->cn_flags |= PDIRUNLOCK; 511 return error; 512 } 513 514 vp = puffs_pnode2vnode(pmp, lookup_arg.pvnr_newnode); 515 if (!vp) { 516 error = puffs_getvnode(dvp->v_mount, 517 lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype, 518 lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp); 519 if (error) { 520 if (cnp->cn_flags & ISDOTDOT) 521 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) != 0) 522 cnp->cn_flags |= PDIRUNLOCK; 523 return error; 524 } 525 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 526 } 527 528 if (cnp->cn_flags & ISDOTDOT) { 529 if (cnp->cn_flags & LOCKPARENT && 530 cnp->cn_flags & ISLASTCN) { 531 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) != 0) { 532 cnp->cn_flags |= PDIRUNLOCK; 533 } 534 } 535 } else { 536 if (wantpunlock) { 537 VOP_UNLOCK(dvp, 0); 538 cnp->cn_flags |= PDIRUNLOCK; 539 } 540 } 541 542 if (cnp->cn_flags & MAKEENTRY) 543 cache_enter(dvp, vp, cnp); 544 *ap->a_vpp = vp; 545 546 return 0; 547 } 548 549 int 550 puffs_create(void *v) 551 { 552 struct vop_create_args /* { 553 const struct vnodeop_desc *a_desc; 554 struct vnode *a_dvp; 555 struct vnode **a_vpp; 556 struct componentname *a_cnp; 557 struct vattr *a_vap; 558 } */ *ap = v; 559 int error; 560 561 PUFFS_VNREQ(create); 562 563 puffs_makecn(&create_arg.pvnr_cn, ap->a_cnp); 564 create_arg.pvnr_va = *ap->a_vap; 565 566 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_CREATE, 567 &create_arg, sizeof(create_arg), VPTOPNC(ap->a_dvp), 568 ap->a_dvp, NULL); 569 if (error) 570 goto out; 571 572 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 573 create_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 0); 574 575 out: 576 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 577 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 578 vput(ap->a_dvp); 579 return error; 580 } 581 582 int 583 puffs_mknod(void *v) 584 { 585 struct vop_mknod_args /* { 586 const struct vnodeop_desc *a_desc; 587 struct vnode *a_dvp; 588 struct vnode **a_vpp; 589 struct componentname *a_cnp; 590 struct vattr *a_vap; 591 } */ *ap = v; 592 int error; 593 594 PUFFS_VNREQ(mknod); 595 596 puffs_makecn(&mknod_arg.pvnr_cn, ap->a_cnp); 597 mknod_arg.pvnr_va = *ap->a_vap; 598 599 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKNOD, 600 &mknod_arg, sizeof(mknod_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 601 if (error) 602 goto out; 603 604 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 605 mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 606 ap->a_vap->va_rdev); 607 608 out: 609 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 610 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 611 vput(ap->a_dvp); 612 return error; 613 } 614 615 int 616 puffs_open(void *v) 617 { 618 struct vop_open_args /* { 619 const struct vnodeop_desc *a_desc; 620 struct vnode *a_vp; 621 int a_mode; 622 kauth_cred_t a_cred; 623 struct lwp *a_l; 624 } */ *ap = v; 625 626 PUFFS_VNREQ(open); 627 628 open_arg.pvnr_mode = ap->a_mode; 629 puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred); 630 open_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 631 632 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_OPEN, 633 &open_arg, sizeof(open_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 634 } 635 636 int 637 puffs_close(void *v) 638 { 639 struct vop_close_args /* { 640 const struct vnodeop_desc *a_desc; 641 struct vnode *a_vp; 642 int a_fflag; 643 kauth_cred_t a_cred; 644 struct lwp *a_l; 645 } */ *ap = v; 646 647 PUFFS_VNREQ(close); 648 649 close_arg.pvnr_fflag = ap->a_fflag; 650 puffs_credcvt(&close_arg.pvnr_cred, ap->a_cred); 651 close_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 652 653 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 654 &close_arg, sizeof(close_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 655 } 656 657 int 658 puffs_access(void *v) 659 { 660 struct vop_access_args /* { 661 const struct vnodeop_desc *a_desc; 662 struct vnode *a_vp; 663 int a_mode; 664 kauth_cred_t a_cred; 665 struct lwp *a_l; 666 } */ *ap = v; 667 668 PUFFS_VNREQ(access); 669 670 access_arg.pvnr_mode = ap->a_mode; 671 access_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 672 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 673 674 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ACCESS, 675 &access_arg, sizeof(access_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 676 } 677 678 int 679 puffs_getattr(void *v) 680 { 681 struct vop_getattr_args /* { 682 const struct vnodeop_desc *a_desc; 683 struct vnode *a_vp; 684 struct vattr *a_vap; 685 kauth_cred_t a_cred; 686 struct lwp *a_l; 687 } */ *ap = v; 688 struct mount *mp; 689 int error; 690 691 PUFFS_VNREQ(getattr); 692 693 mp = ap->a_vp->v_mount; 694 695 vattr_null(&getattr_arg.pvnr_va); 696 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 697 getattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 698 699 /* 700 * XXX + XX (dos equis): this can't go through the unlock/lock 701 * cycle, since it can be called from uvn_attach(), which fiddles 702 * around with VXLOCK and therefore breaks vn_lock(). Proper 703 * fix pending. 704 */ 705 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_GETATTR, 706 &getattr_arg, sizeof(getattr_arg), VPTOPNC(ap->a_vp), 707 NULL /* XXXseeabove: should be LOCKEDVP(ap->a_vp) */, NULL); 708 if (error) 709 return error; 710 711 (void)memcpy(ap->a_vap, &getattr_arg.pvnr_va, sizeof(struct vattr)); 712 713 /* 714 * fill in information userspace does not have 715 * XXX: but would it be better to do fsid at the generic level? 716 */ 717 ap->a_vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 718 719 return 0; 720 } 721 722 int 723 puffs_setattr(void *v) 724 { 725 struct vop_getattr_args /* { 726 const struct vnodeop_desc *a_desc; 727 struct vnode *a_vp; 728 struct vattr *a_vap; 729 kauth_cred_t a_cred; 730 struct lwp *a_l; 731 } */ *ap = v; 732 int error; 733 734 PUFFS_VNREQ(setattr); 735 736 (void)memcpy(&setattr_arg.pvnr_va, ap->a_vap, sizeof(struct vattr)); 737 puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred); 738 setattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 739 740 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR, 741 &setattr_arg, sizeof(setattr_arg), VPTOPNC(ap->a_vp), 742 ap->a_vp, NULL); 743 if (error) 744 return error; 745 746 if (ap->a_vap->va_size != VNOVAL) 747 uvm_vnp_setsize(ap->a_vp, ap->a_vap->va_size); 748 749 return 0; 750 } 751 752 int 753 puffs_revoke(void *v) 754 { 755 struct vop_revoke_args /* { 756 const struct vnodeop_desc *a_desc; 757 struct vnode *a_vp; 758 int a_flags; 759 } */ *ap = v; 760 struct puffs_mount *pmp; 761 762 PUFFS_VNREQ(revoke); 763 764 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 765 766 revoke_arg.pvnr_flags = ap->a_flags; 767 768 /* don't really care if userspace doesn't want to play along */ 769 if (EXISTSOP(pmp, REVOKE)) 770 puffs_vntouser(pmp, PUFFS_VN_REVOKE, 771 &revoke_arg, sizeof(revoke_arg), VPTOPNC(ap->a_vp), 772 NULL, NULL); 773 774 return genfs_revoke(v); 775 } 776 777 /* 778 * There is no technical need to have this travel to userspace 779 * synchronously. So once async reply support is in place, make this 780 * async. 781 */ 782 int 783 puffs_inactive(void *v) 784 { 785 struct vop_inactive_args /* { 786 const struct vnodeop_desc *a_desc; 787 struct vnode *a_vp; 788 struct lwp *a_l; 789 } */ *ap = v; 790 struct puffs_mount *pmp; 791 struct puffs_node *pnode; 792 int rv, vnrefs; 793 794 PUFFS_VNREQ(inactive); 795 796 /* 797 * XXX: think about this after we really start unlocking 798 * when going to userspace 799 */ 800 pnode = ap->a_vp->v_data; 801 pnode->pn_stat |= PNODE_INACTIVE; 802 803 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 804 805 inactive_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 806 807 if (EXISTSOP(pmp, INACTIVE)) 808 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 809 &inactive_arg, sizeof(inactive_arg), VPTOPNC(ap->a_vp), 810 ap->a_vp, NULL); 811 else 812 rv = 1; /* see below */ 813 814 /* can't trust userspace return value? simulate safe answer */ 815 if (rv) 816 vnrefs = 1; 817 else 818 vnrefs = inactive_arg.pvnr_backendrefs; 819 820 VOP_UNLOCK(ap->a_vp, 0); 821 822 /* 823 * user server thinks it's gone? then don't be afraid care, 824 * node's life was already all it would ever be 825 */ 826 if (vnrefs == 0) 827 vrecycle(ap->a_vp, NULL, ap->a_l); 828 829 return 0; 830 } 831 832 int 833 puffs_reclaim(void *v) 834 { 835 struct vop_reclaim_args /* { 836 const struct vnodeop_desc *a_desc; 837 struct vnode *a_vp; 838 struct lwp *a_l; 839 } */ *ap = v; 840 struct puffs_mount *pmp; 841 int error; 842 843 PUFFS_VNREQ(reclaim); 844 845 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 846 847 /* 848 * first things first: check if someone is trying to reclaim the 849 * root vnode. do not allow that to travel to userspace. 850 * Note that we don't need to take the lock similarly to 851 * puffs_root(), since there is only one of us. 852 */ 853 if (ap->a_vp->v_flag & VROOT) { 854 #ifdef DIAGNOSTIC 855 simple_lock(&pmp->pmp_lock); 856 if (pmp->pmp_root == NULL) 857 panic("puffs_reclaim: releasing root vnode (%p) twice", 858 ap->a_vp); 859 simple_unlock(&pmp->pmp_lock); 860 #endif 861 pmp->pmp_root = NULL; 862 puffs_putvnode(ap->a_vp); 863 return 0; 864 } 865 866 reclaim_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 867 868 if (EXISTSOP(pmp, RECLAIM)) 869 error = puffs_vntouser(pmp, PUFFS_VN_RECLAIM, 870 &reclaim_arg, sizeof(reclaim_arg), VPTOPNC(ap->a_vp), 871 NULL, NULL); 872 else 873 error = 0; 874 #if 0 875 /* 876 * XXX: if reclaim fails for any other reason than the userspace 877 * being dead, we should consider unmounting the filesystem, since 878 * we can't trust it to be in a consistent state anymore. But for 879 * now, just ignore all errors. 880 */ 881 if (error) 882 return error; 883 #endif 884 885 puffs_putvnode(ap->a_vp); 886 887 return 0; 888 } 889 890 int 891 puffs_readdir(void *v) 892 { 893 struct vop_readdir_args /* { 894 const struct vnodeop_desc *a_desc; 895 struct vnode *a_vp; 896 struct uio *a_uio; 897 kauth_cred_t a_cred; 898 int *a_eofflag; 899 off_t **a_cookies; 900 int *a_ncookies; 901 } */ *ap = v; 902 struct puffs_vnreq_readdir *readdir_argp; 903 size_t argsize; 904 struct uio *uio = ap->a_uio; 905 size_t howmuch; 906 int error; 907 908 /* worry about these later */ 909 if (!(ap->a_cookies == NULL && ap->a_ncookies == NULL)) 910 return EOPNOTSUPP; 911 912 argsize = sizeof(struct puffs_vnreq_readdir); 913 readdir_argp = malloc(argsize, M_PUFFS, M_ZERO | M_WAITOK); 914 915 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 916 readdir_argp->pvnr_offset = uio->uio_offset; 917 readdir_argp->pvnr_resid = uio->uio_resid; 918 919 error = puffs_vntouser_adjbuf(MPTOPUFFSMP(ap->a_vp->v_mount), 920 PUFFS_VN_READDIR, (void **)&readdir_argp, &argsize, 921 readdir_argp->pvnr_resid, VPTOPNC(ap->a_vp), ap->a_vp, NULL); 922 if (error) 923 goto out; 924 925 /* userspace is cheating? */ 926 if (readdir_argp->pvnr_resid > uio->uio_resid) { 927 error = EINVAL; 928 goto out; 929 } 930 931 /* bouncy-wouncy with the directory data */ 932 howmuch = uio->uio_resid - readdir_argp->pvnr_resid; 933 error = uiomove(readdir_argp->pvnr_dent, howmuch, uio); 934 if (error) 935 goto out; 936 uio->uio_offset = readdir_argp->pvnr_offset; 937 938 out: 939 free(readdir_argp, M_PUFFS); 940 return error; 941 } 942 943 int 944 puffs_poll(void *v) 945 { 946 struct vop_poll_args /* { 947 const struct vnodeop_desc *a_desc; 948 struct vnode *a_vp; 949 int a_events; 950 struct lwp *a_l; 951 }*/ *ap = v; 952 953 PUFFS_VNREQ(poll); 954 955 poll_arg.pvnr_events = ap->a_events; 956 poll_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 957 958 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_POLL, 959 &poll_arg, sizeof(poll_arg), VPTOPNC(ap->a_vp), NULL, NULL); 960 } 961 962 int 963 puffs_fsync(void *v) 964 { 965 struct vop_fsync_args /* { 966 const struct vnodeop_desc *a_desc; 967 struct vnode *a_vp; 968 kauth_cred_t a_cred; 969 int a_flags; 970 off_t a_offlo; 971 off_t a_offhi; 972 struct lwp *a_l; 973 } */ *ap = v; 974 struct puffs_vnreq_fsync *fsync_argp; 975 struct vnode *vp; 976 int pflags, error; 977 978 PUFFS_VNREQ(fsync); 979 980 vp = ap->a_vp; 981 982 pflags = PGO_CLEANIT; 983 if (ap->a_flags & FSYNC_WAIT) { 984 pflags |= PGO_SYNCIO; 985 fsync_argp = &fsync_arg; 986 } else { 987 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 988 M_PUFFS, M_ZERO | M_NOWAIT); 989 if (fsync_argp == NULL) 990 return ENOMEM; 991 } 992 993 /* 994 * flush pages to avoid being overly dirty 995 */ 996 simple_lock(&vp->v_interlock); 997 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 998 round_page(ap->a_offhi), pflags); 999 if (error) 1000 return error; 1001 1002 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 1003 fsync_argp->pvnr_flags = ap->a_flags; 1004 fsync_argp->pvnr_offlo = ap->a_offlo; 1005 fsync_argp->pvnr_offhi = ap->a_offhi; 1006 fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 1007 1008 /* 1009 * XXX: see comment at puffs_getattr about locking 1010 * 1011 * If we are not required to wait, do a FAF operation. 1012 * Otherwise block here. 1013 */ 1014 if (ap->a_flags & FSYNC_WAIT) { 1015 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1016 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 1017 VPTOPNC(vp), NULL /* XXXshouldbe: vp */, NULL); 1018 } else { 1019 /* FAF is always "succesful" */ 1020 error = 0; 1021 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1022 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 1023 VPTOPNC(vp)); 1024 } 1025 1026 return error; 1027 } 1028 1029 int 1030 puffs_seek(void *v) 1031 { 1032 struct vop_seek_args /* { 1033 const struct vnodeop_desc *a_desc; 1034 struct vnode *a_vp; 1035 off_t a_oldoff; 1036 off_t a_newoff; 1037 kauth_cred_t a_cred; 1038 } */ *ap = v; 1039 1040 PUFFS_VNREQ(seek); 1041 1042 seek_arg.pvnr_oldoff = ap->a_oldoff; 1043 seek_arg.pvnr_newoff = ap->a_newoff; 1044 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1045 1046 /* 1047 * XXX: seems like seek is called with an unlocked vp, but 1048 * it can't hurt to play safe 1049 */ 1050 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1051 &seek_arg, sizeof(seek_arg), VPTOPNC(ap->a_vp), 1052 LOCKEDVP(ap->a_vp), NULL); 1053 } 1054 1055 int 1056 puffs_remove(void *v) 1057 { 1058 struct vop_remove_args /* { 1059 const struct vnodeop_desc *a_desc; 1060 struct vnode *a_dvp; 1061 struct vnode *a_vp; 1062 struct componentname *a_cnp; 1063 } */ *ap = v; 1064 int error; 1065 1066 PUFFS_VNREQ(remove); 1067 1068 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1069 puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp); 1070 1071 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE, 1072 &remove_arg, sizeof(remove_arg), VPTOPNC(ap->a_dvp), 1073 ap->a_dvp, ap->a_vp); 1074 1075 vput(ap->a_vp); 1076 vput(ap->a_dvp); 1077 1078 return error; 1079 } 1080 1081 int 1082 puffs_mkdir(void *v) 1083 { 1084 struct vop_mkdir_args /* { 1085 const struct vnodeop_desc *a_desc; 1086 struct vnode *a_dvp; 1087 struct vnode **a_vpp; 1088 struct componentname *a_cnp; 1089 struct vattr *a_vap; 1090 } */ *ap = v; 1091 int error; 1092 1093 PUFFS_VNREQ(mkdir); 1094 1095 puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp); 1096 mkdir_arg.pvnr_va = *ap->a_vap; 1097 1098 /* XXX: wouldn't need to relock dvp, but that's life */ 1099 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR, 1100 &mkdir_arg, sizeof(mkdir_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1101 if (error) 1102 goto out; 1103 1104 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1105 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1106 1107 out: 1108 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1109 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1110 vput(ap->a_dvp); 1111 return error; 1112 } 1113 1114 int 1115 puffs_rmdir(void *v) 1116 { 1117 struct vop_rmdir_args /* { 1118 const struct vnodeop_desc *a_desc; 1119 struct vnode *a_dvp; 1120 struct vnode *a_vp; 1121 struct componentname *a_cnp; 1122 } */ *ap = v; 1123 int error; 1124 1125 PUFFS_VNREQ(rmdir); 1126 1127 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1128 puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp); 1129 1130 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR, 1131 &rmdir_arg, sizeof(rmdir_arg), VPTOPNC(ap->a_dvp), 1132 ap->a_dvp, ap->a_vp); 1133 1134 vput(ap->a_dvp); 1135 vput(ap->a_vp); 1136 1137 return error; 1138 } 1139 1140 int 1141 puffs_link(void *v) 1142 { 1143 struct vop_link_args /* { 1144 const struct vnodeop_desc *a_desc; 1145 struct vnode *a_dvp; 1146 struct vnode *a_vp; 1147 struct componentname *a_cnp; 1148 }*/ *ap = v; 1149 int error; 1150 1151 PUFFS_VNREQ(link); 1152 1153 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1154 puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp); 1155 1156 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK, 1157 &link_arg, sizeof(link_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1158 1159 vput(ap->a_dvp); 1160 1161 return error; 1162 } 1163 1164 int 1165 puffs_symlink(void *v) 1166 { 1167 struct vop_symlink_args /* { 1168 const struct vnodeop_desc *a_desc; 1169 struct vnode *a_dvp; 1170 struct vnode **a_vpp; 1171 struct componentname *a_cnp; 1172 struct vattr *a_vap; 1173 char *a_target; 1174 }*/ *ap = v; 1175 int error; 1176 1177 PUFFS_VNREQ(symlink); /* XXX: large structure */ 1178 1179 *ap->a_vpp = NULL; 1180 1181 puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp); 1182 symlink_arg.pvnr_va = *ap->a_vap; 1183 (void)strlcpy(symlink_arg.pvnr_link, ap->a_target, 1184 sizeof(symlink_arg.pvnr_link)); 1185 1186 /* XXX: don't need to relock parent */ 1187 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), 1188 PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg), 1189 VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1190 if (error) 1191 goto out; 1192 1193 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1194 symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0); 1195 1196 out: 1197 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1198 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1199 vput(ap->a_dvp); 1200 return error; 1201 } 1202 1203 int 1204 puffs_readlink(void *v) 1205 { 1206 struct vop_readlink_args /* { 1207 const struct vnodeop_desc *a_desc; 1208 struct vnode *a_vp; 1209 struct uio *a_uio; 1210 kauth_cred_t a_cred; 1211 } */ *ap = v; 1212 int error; 1213 1214 PUFFS_VNREQ(readlink); 1215 1216 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1217 readlink_arg.pvnr_linklen = sizeof(readlink_arg.pvnr_link); 1218 1219 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1220 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 1221 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1222 if (error) 1223 return error; 1224 1225 readlink_arg.pvnr_link[readlink_arg.pvnr_linklen] = '\0'; 1226 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1227 ap->a_uio); 1228 } 1229 1230 /* XXXXXXX: think about locking & userspace op delocking... */ 1231 int 1232 puffs_rename(void *v) 1233 { 1234 struct vop_rename_args /* { 1235 const struct vnodeop_desc *a_desc; 1236 struct vnode *a_fdvp; 1237 struct vnode *a_fvp; 1238 struct componentname *a_fcnp; 1239 struct vnode *a_tdvp; 1240 struct vnode *a_tvp; 1241 struct componentname *a_tcnp; 1242 }*/ *ap = v; 1243 int error; 1244 1245 PUFFS_VNREQ(rename); 1246 1247 /* 1248 * participate in the duck hunt 1249 * (I could do with some canard a la presse, so hopefully 1250 * this is succesful) 1251 */ 1252 KASSERT(ap->a_tdvp != ap->a_tvp); 1253 1254 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) { 1255 error = EXDEV; 1256 goto out; 1257 } 1258 1259 rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1260 rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1261 if (ap->a_tvp) 1262 rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1263 else 1264 rename_arg.pvnr_cookie_targ = NULL; 1265 puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp); 1266 puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp); 1267 1268 error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount), 1269 PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg), 1270 VPTOPNC(ap->a_fdvp), NULL, NULL); 1271 1272 out: 1273 vput(ap->a_tdvp); 1274 if (ap->a_tvp != NULL) 1275 vput(ap->a_tvp); 1276 1277 vrele(ap->a_fdvp); 1278 vrele(ap->a_fvp); 1279 1280 return error; 1281 } 1282 1283 int 1284 puffs_read(void *v) 1285 { 1286 struct vop_read_args /* { 1287 const struct vnodeop_desc *a_desc; 1288 struct vnode *a_vp; 1289 struct uio *a_uio; 1290 int a_ioflag; 1291 kauth_cred_t a_cred; 1292 } */ *ap = v; 1293 struct puffs_vnreq_read *read_argp; 1294 struct puffs_mount *pmp; 1295 struct vnode *vp; 1296 struct uio *uio; 1297 void *win; 1298 size_t tomove, argsize; 1299 vsize_t bytelen; 1300 int error, ubcflags; 1301 1302 uio = ap->a_uio; 1303 vp = ap->a_vp; 1304 read_argp = NULL; 1305 error = 0; 1306 pmp = MPTOPUFFSMP(vp->v_mount); 1307 1308 /* std sanity */ 1309 if (uio->uio_resid == 0) 1310 return 0; 1311 if (uio->uio_offset < 0) 1312 return EINVAL; 1313 1314 if (vp->v_type == VREG && (pmp->pmp_flags & PUFFS_KFLAG_NOCACHE) == 0) { 1315 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1316 1317 ubcflags = 0; 1318 if (UBC_WANT_UNMAP(vp)) 1319 ubcflags = UBC_UNMAP; 1320 1321 while (uio->uio_resid > 0) { 1322 bytelen = MIN(uio->uio_resid, 1323 vp->v_size - uio->uio_offset); 1324 if (bytelen == 0) 1325 break; 1326 1327 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1328 &bytelen, advice, UBC_READ); 1329 error = uiomove(win, bytelen, uio); 1330 ubc_release(win, ubcflags); 1331 if (error) 1332 break; 1333 } 1334 1335 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1336 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1337 } else { 1338 /* 1339 * in case it's not a regular file or we're operating 1340 * uncached, do read in the old-fashioned style, 1341 * i.e. explicit read operations 1342 */ 1343 1344 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1345 argsize = sizeof(struct puffs_vnreq_read); 1346 read_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1347 1348 error = 0; 1349 while (uio->uio_resid > 0) { 1350 read_argp->pvnr_ioflag = ap->a_ioflag; 1351 read_argp->pvnr_resid = tomove; 1352 read_argp->pvnr_offset = uio->uio_offset; 1353 puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred); 1354 1355 argsize = sizeof(struct puffs_vnreq_read); 1356 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1357 (void **)&read_argp, &argsize, 1358 read_argp->pvnr_resid, VPTOPNC(ap->a_vp), 1359 ap->a_vp, NULL); 1360 if (error) 1361 break; 1362 1363 if (read_argp->pvnr_resid > tomove) { 1364 error = EINVAL; 1365 break; 1366 } 1367 1368 error = uiomove(read_argp->pvnr_data, 1369 tomove - read_argp->pvnr_resid, uio); 1370 1371 /* 1372 * in case the file is out of juice, resid from 1373 * userspace is != 0. and the error-case is 1374 * quite obvious 1375 */ 1376 if (error || read_argp->pvnr_resid) 1377 break; 1378 1379 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1380 } 1381 } 1382 1383 if (read_argp) 1384 free(read_argp, M_PUFFS); 1385 return error; 1386 } 1387 1388 int 1389 puffs_write(void *v) 1390 { 1391 struct vop_write_args /* { 1392 const struct vnodeop_desc *a_desc; 1393 struct vnode *a_vp; 1394 struct uio *a_uio; 1395 int a_ioflag; 1396 kauth_cred_t a_cred; 1397 }*/ *ap = v; 1398 struct puffs_vnreq_write *write_argp; 1399 struct puffs_mount *pmp; 1400 struct uio *uio; 1401 struct vnode *vp; 1402 void *win; 1403 size_t tomove, argsize; 1404 off_t oldoff, newoff, origoff; 1405 vsize_t bytelen; 1406 int error, uflags; 1407 int async, ubcflags; 1408 1409 vp = ap->a_vp; 1410 uio = ap->a_uio; 1411 async = vp->v_mount->mnt_flag & MNT_ASYNC; 1412 error = uflags = 0; 1413 write_argp = NULL; 1414 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1415 1416 if (vp->v_type == VREG && (pmp->pmp_flags & PUFFS_KFLAG_NOCACHE) == 0) { 1417 ubcflags = 0; 1418 if (UBC_WANT_UNMAP(vp)) 1419 ubcflags = UBC_UNMAP; 1420 1421 /* 1422 * userspace *should* be allowed to control this, 1423 * but with UBC it's a bit unclear how to handle it 1424 */ 1425 if (ap->a_ioflag & IO_APPEND) 1426 uio->uio_offset = vp->v_size; 1427 1428 origoff = uio->uio_offset; 1429 while (uio->uio_resid > 0) { 1430 uflags |= PUFFS_UPDATECTIME; 1431 uflags |= PUFFS_UPDATEMTIME; 1432 oldoff = uio->uio_offset; 1433 bytelen = uio->uio_resid; 1434 1435 win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, 1436 UVM_ADV_NORMAL, UBC_WRITE); 1437 error = uiomove(win, bytelen, uio); 1438 1439 /* 1440 * did we grow the file? 1441 * XXX: should probably ask userspace to extend 1442 * it's idea of the *first* before growing it 1443 * here. Or we need some mechanism to "rollback" 1444 * in case putpages fails. 1445 */ 1446 newoff = oldoff + bytelen; 1447 if (vp->v_size < newoff) { 1448 uflags |= PUFFS_UPDATESIZE; 1449 uvm_vnp_setsize(vp, newoff); 1450 1451 /* 1452 * in case we couldn't copy data to the 1453 * window, zero it out so that we don't 1454 * have any random leftovers in there. 1455 */ 1456 if (error) 1457 memset(win, 0, bytelen); 1458 } 1459 1460 ubc_release(win, ubcflags); 1461 if (error) 1462 break; 1463 1464 /* ok, I really need to admit: why's this? */ 1465 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 1466 simple_lock(&vp->v_interlock); 1467 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1468 uio->uio_offset & ~0xffff, PGO_CLEANIT); 1469 if (error) 1470 break; 1471 } 1472 } 1473 1474 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1475 simple_lock(&vp->v_interlock); 1476 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1477 round_page(uio->uio_offset), 1478 PGO_CLEANIT | PGO_SYNCIO); 1479 } 1480 1481 puffs_updatenode(vp, uflags); 1482 } else { 1483 /* tomove is non-increasing */ 1484 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1485 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1486 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1487 1488 while (uio->uio_resid > 0) { 1489 write_argp->pvnr_ioflag = ap->a_ioflag; 1490 write_argp->pvnr_resid = tomove; 1491 write_argp->pvnr_offset = uio->uio_offset; 1492 puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred); 1493 error = uiomove(write_argp->pvnr_data, tomove, uio); 1494 if (error) 1495 break; 1496 1497 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1498 PUFFS_VN_WRITE, write_argp, argsize, 1499 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1500 if (error) { 1501 /* restore uiomove */ 1502 uio->uio_resid += tomove; 1503 uio->uio_offset -= tomove; 1504 break; 1505 } 1506 if (write_argp->pvnr_resid > tomove) { 1507 /* 1508 * XXX: correct file size is a mystery, 1509 * we can only guess 1510 */ 1511 error = EINVAL; 1512 break; 1513 } 1514 1515 /* adjust file size */ 1516 if (vp->v_size < uio->uio_offset) 1517 uvm_vnp_setsize(vp, uio->uio_offset); 1518 1519 /* didn't move everything? bad userspace. bail */ 1520 if (write_argp->pvnr_resid != 0) { 1521 uio->uio_resid += write_argp->pvnr_resid; 1522 uio->uio_offset -= write_argp->pvnr_resid; 1523 error = EIO; 1524 break; 1525 } 1526 1527 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1528 } 1529 } 1530 1531 if (write_argp) 1532 free(write_argp, M_PUFFS); 1533 return error; 1534 } 1535 1536 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1537 1538 #define FCNIOCTL_ARG_MAX 1<<16 1539 int 1540 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1541 { 1542 /* struct vop_ioctl_args { 1543 const struct vnodeop_desc *a_desc; 1544 struct vnode *a_vp; 1545 u_long a_command; 1546 void *a_data; 1547 int a_fflag; 1548 kauth_cred_t a_cred; 1549 struct lwp *a_l; 1550 }*ap = v; */ 1551 struct puffs_mount *pmp; 1552 struct puffs_sizepark pspark; 1553 void *kernbuf; 1554 size_t copylen; 1555 int error; 1556 1557 PUFFS_VNREQ(fcnioctl); 1558 1559 /* 1560 * Since this op gives the filesystem (almost) complete control on 1561 * how much it is allowed to copy from the calling process 1562 * address space, do not enable it by default, since it would 1563 * be a whopping security hole. 1564 */ 1565 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1566 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1567 return EINVAL; /* only shoe that fits */ 1568 1569 /* fill in sizereq and store it */ 1570 pspark.pkso_reqid = puffs_getreqid(pmp); 1571 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1572 pspark.pkso_copybuf = ap->a_data; 1573 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1574 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1575 1576 /* then fill in actual request and shoot it off */ 1577 fcnioctl_arg.pvnr_command = ap->a_command; 1578 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1579 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1580 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1581 1582 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1583 &fcnioctl_arg, sizeof(fcnioctl_arg), VPTOPNC(ap->a_vp), 1584 pspark.pkso_reqid, NULL, NULL); 1585 1586 /* if we don't need to copy data, we're done */ 1587 if (error || !fcnioctl_arg.pvnr_copyback) 1588 return error; 1589 1590 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1591 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1592 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1593 if (error) 1594 goto out; 1595 error = copyout(kernbuf, ap->a_data, copylen); 1596 1597 out: 1598 free(kernbuf, M_PUFFS); 1599 return error; 1600 } 1601 1602 int 1603 puffs_ioctl(void *v) 1604 { 1605 1606 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1607 } 1608 1609 int 1610 puffs_fcntl(void *v) 1611 { 1612 1613 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1614 } 1615 1616 int 1617 puffs_print(void *v) 1618 { 1619 struct vop_print_args /* { 1620 struct vnode *a_vp; 1621 } */ *ap = v; 1622 struct puffs_mount *pmp; 1623 struct vnode *vp = ap->a_vp; 1624 struct puffs_node *pn = vp->v_data; 1625 1626 PUFFS_VNREQ(print); 1627 1628 pmp = MPTOPUFFSMP(vp->v_mount); 1629 1630 /* kernel portion */ 1631 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1632 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1633 if (vp->v_type == VFIFO) 1634 fifo_printinfo(vp); 1635 lockmgr_printinfo(&vp->v_lock); 1636 1637 /* userspace portion */ 1638 if (EXISTSOP(pmp, PRINT)) 1639 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1640 &print_arg, sizeof(print_arg), VPTOPNC(ap->a_vp), 1641 LOCKEDVP(ap->a_vp), NULL); 1642 1643 return 0; 1644 } 1645 1646 int 1647 puffs_pathconf(void *v) 1648 { 1649 struct vop_pathconf_args /* { 1650 const struct vnodeop_desc *a_desc; 1651 struct vnode *a_vp; 1652 int a_name; 1653 register_t *a_retval; 1654 } */ *ap = v; 1655 int error; 1656 1657 PUFFS_VNREQ(pathconf); 1658 1659 pathconf_arg.pvnr_name = ap->a_name; 1660 1661 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1662 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 1663 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1664 if (error) 1665 return error; 1666 1667 *ap->a_retval = pathconf_arg.pvnr_retval; 1668 1669 return 0; 1670 } 1671 1672 int 1673 puffs_advlock(void *v) 1674 { 1675 struct vop_advlock_args /* { 1676 const struct vnodeop_desc *a_desc; 1677 struct vnode *a_vp; 1678 void *a_id; 1679 int a_op; 1680 struct flock *a_fl; 1681 int a_flags; 1682 } */ *ap = v; 1683 int error; 1684 1685 PUFFS_VNREQ(advlock); 1686 1687 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1688 if (error) 1689 return error; 1690 advlock_arg.pvnr_id = ap->a_id; 1691 advlock_arg.pvnr_op = ap->a_op; 1692 advlock_arg.pvnr_flags = ap->a_flags; 1693 1694 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1695 &advlock_arg, sizeof(advlock_arg), VPTOPNC(ap->a_vp), NULL, NULL); 1696 } 1697 /* 1698 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1699 */ 1700 int 1701 puffs_strategy(void *v) 1702 { 1703 struct vop_strategy_args /* { 1704 const struct vnodeop_desc *a_desc; 1705 struct vnode *a_vp; 1706 struct buf *a_bp; 1707 } */ *ap = v; 1708 struct puffs_mount *pmp; 1709 struct puffs_vnreq_read *read_argp = NULL; 1710 struct puffs_vnreq_write *write_argp = NULL; 1711 struct buf *bp; 1712 size_t argsize; 1713 size_t tomove, moved; 1714 int error; 1715 1716 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1717 bp = ap->a_bp; 1718 1719 if ((bp->b_flags & B_READ) && !EXISTSOP(pmp, READ)) 1720 return EOPNOTSUPP; 1721 if ((bp->b_flags & B_WRITE) && !EXISTSOP(pmp, WRITE)) 1722 return EOPNOTSUPP; 1723 1724 #ifdef DIAGNOSTIC 1725 if (bp->b_resid > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1726 panic("puffs_strategy: wildly inappropriate buf resid %d", 1727 bp->b_resid); 1728 #endif 1729 1730 if (bp->b_flags & B_READ) { 1731 argsize = sizeof(struct puffs_vnreq_read); 1732 read_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 1733 if (read_argp == NULL) { 1734 error = ENOMEM; 1735 goto out; 1736 } 1737 1738 tomove = PUFFS_TOMOVE(bp->b_resid, pmp); 1739 1740 read_argp->pvnr_ioflag = 0; 1741 read_argp->pvnr_resid = tomove; 1742 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1743 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1744 1745 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1746 (void **)&read_argp, &argsize, 1747 read_argp->pvnr_resid, VPTOPNC(ap->a_vp), 1748 LOCKEDVP(ap->a_vp), NULL); 1749 1750 if (error) 1751 goto out; 1752 1753 if (read_argp->pvnr_resid > tomove) { 1754 error = EINVAL; 1755 goto out; 1756 } 1757 1758 moved = tomove - read_argp->pvnr_resid; 1759 1760 (void)memcpy(bp->b_data, read_argp->pvnr_data, moved); 1761 bp->b_resid -= moved; 1762 } else { 1763 argsize = sizeof(struct puffs_vnreq_write) + bp->b_bcount; 1764 write_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 1765 if (write_argp == NULL) { 1766 error = ENOMEM; 1767 goto out; 1768 } 1769 1770 tomove = PUFFS_TOMOVE(bp->b_resid, pmp); 1771 1772 write_argp->pvnr_ioflag = 0; 1773 write_argp->pvnr_resid = tomove; 1774 write_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1775 puffs_credcvt(&write_argp->pvnr_cred, FSCRED); 1776 1777 (void)memcpy(&write_argp->pvnr_data, bp->b_data, tomove); 1778 1779 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1780 PUFFS_VN_WRITE, write_argp, argsize, 1781 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1782 if (error) 1783 goto out; 1784 1785 moved = write_argp->pvnr_resid - tomove; 1786 1787 if (write_argp->pvnr_resid > tomove) { 1788 error = EINVAL; 1789 goto out; 1790 } 1791 1792 bp->b_resid -= moved; 1793 if (write_argp->pvnr_resid != 0) 1794 error = EIO; 1795 } 1796 1797 out: 1798 if (read_argp) 1799 free(read_argp, M_PUFFS); 1800 if (write_argp) 1801 free(write_argp, M_PUFFS); 1802 1803 biodone(ap->a_bp); 1804 return error; 1805 } 1806 1807 /* 1808 * The rest don't get a free trip to userspace and back, they 1809 * have to stay within the kernel. 1810 */ 1811 1812 /* 1813 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 1814 * well, maybe somehow, somewhere, some day .... 1815 */ 1816 int 1817 puffs_bmap(void *v) 1818 { 1819 struct vop_bmap_args /* { 1820 const struct vnodeop_desc *a_desc; 1821 struct vnode *a_vp; 1822 daddr_t a_bn; 1823 struct vnode **a_vpp; 1824 daddr_t *a_bnp; 1825 int *a_runp; 1826 } */ *ap = v; 1827 struct puffs_mount *pmp; 1828 1829 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1830 1831 if (ap->a_vpp) 1832 *ap->a_vpp = ap->a_vp; 1833 if (ap->a_bnp) 1834 *ap->a_bnp = ap->a_bn; 1835 if (ap->a_runp) 1836 *ap->a_runp = pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX; 1837 1838 return 0; 1839 } 1840 1841 /* 1842 * moreXXX: yes, todo 1843 */ 1844 int 1845 puffs_lock(void *v) 1846 { 1847 struct vop_lock_args /* { 1848 struct vnode *a_vp; 1849 int a_flags; 1850 }*/ *ap = v; 1851 struct vnode *vp = ap->a_vp; 1852 1853 #if 0 1854 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1855 #endif 1856 1857 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 1858 } 1859 1860 int 1861 puffs_unlock(void *v) 1862 { 1863 struct vop_unlock_args /* { 1864 struct vnode *a_vp; 1865 int a_flags; 1866 } */ *ap = v; 1867 struct vnode *vp = ap->a_vp; 1868 1869 #if 0 1870 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1871 #endif 1872 1873 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 1874 } 1875 1876 int 1877 puffs_islocked(void *v) 1878 { 1879 struct vop_islocked_args *ap = v; 1880 int rv; 1881 1882 rv = lockstatus(&ap->a_vp->v_lock); 1883 return rv; 1884 } 1885 1886 int 1887 puffs_mmap(void *v) 1888 { 1889 struct vop_mmap_args *ap = v; 1890 struct puffs_mount *pmp; 1891 1892 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1893 1894 if (pmp->pmp_flags & PUFFS_KFLAG_NOCACHE) 1895 return genfs_eopnotsupp(v); 1896 1897 return genfs_mmap(v); 1898 } 1899 1900 int 1901 puffs_generic(void *v) 1902 { 1903 struct vop_generic_args *ap = v; 1904 1905 (void)ap; 1906 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 1907 1908 return EOPNOTSUPP; 1909 } 1910
Indexes created Tue Sep 30 20:09:53 GMT 2025