puffs_vnops.c revision 1.32
1 /* $NetBSD: puffs_vnops.c,v 1.32 2007/01/15 20:40:29 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 1.32 2007/01/15 20:40:29 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_spec_read(void *); 85 int puffs_spec_write(void *); 86 int puffs_fifo_read(void *); 87 int puffs_fifo_write(void *); 88 89 int puffs_checkop(void *); 90 91 92 /* VOP_LEASE() not included */ 93 94 int puffs_generic(void *); 95 96 #if 0 97 #define puffs_lock genfs_lock 98 #define puffs_unlock genfs_unlock 99 #define puffs_islocked genfs_islocked 100 #else 101 int puffs_lock(void *); 102 int puffs_unlock(void *); 103 int puffs_islocked(void *); 104 #endif 105 106 int (**puffs_vnodeop_p)(void *); 107 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 108 { &vop_default_desc, vn_default_error }, 109 { &vop_lookup_desc, puffs_lookup }, /* REAL lookup */ 110 { &vop_create_desc, puffs_checkop }, /* create */ 111 { &vop_mknod_desc, puffs_checkop }, /* mknod */ 112 { &vop_open_desc, puffs_checkop }, /* open */ 113 { &vop_close_desc, puffs_checkop }, /* close */ 114 { &vop_access_desc, puffs_checkop }, /* access */ 115 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 116 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 117 { &vop_read_desc, puffs_checkop }, /* read */ 118 { &vop_write_desc, puffs_checkop }, /* write */ 119 { &vop_fcntl_desc, puffs_checkop }, /* fcntl */ 120 { &vop_ioctl_desc, puffs_checkop }, /* ioctl */ 121 { &vop_fsync_desc, puffs_fsync }, /* REAL fsync */ 122 { &vop_seek_desc, puffs_checkop }, /* seek */ 123 { &vop_remove_desc, puffs_checkop }, /* remove */ 124 { &vop_link_desc, puffs_checkop }, /* link */ 125 { &vop_rename_desc, puffs_checkop }, /* rename */ 126 { &vop_mkdir_desc, puffs_checkop }, /* mkdir */ 127 { &vop_rmdir_desc, puffs_checkop }, /* rmdir */ 128 { &vop_symlink_desc, puffs_checkop }, /* symlink */ 129 { &vop_readdir_desc, puffs_checkop }, /* readdir */ 130 { &vop_readlink_desc, puffs_checkop }, /* readlink */ 131 { &vop_getpages_desc, puffs_checkop }, /* getpages */ 132 { &vop_putpages_desc, puffs_checkop }, /* putpages */ 133 { &vop_pathconf_desc, puffs_checkop }, /* pathconf */ 134 { &vop_advlock_desc, puffs_checkop }, /* advlock */ 135 { &vop_strategy_desc, puffs_strategy }, /* REAL strategy */ 136 { &vop_revoke_desc, puffs_revoke }, /* REAL revoke */ 137 { &vop_abortop_desc, genfs_abortop }, /* REAL abortop */ 138 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 139 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 140 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 141 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 142 { &vop_bmap_desc, puffs_bmap }, /* REAL bmap */ 143 { &vop_print_desc, puffs_print }, /* REAL print */ 144 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 145 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 146 { &vop_mmap_desc, puffs_mmap }, /* REAL mmap */ 147 148 { &vop_poll_desc, genfs_eopnotsupp }, /* poll XXX */ 149 { &vop_poll_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 150 { NULL, NULL } 151 }; 152 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 153 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 154 155 156 int (**puffs_specop_p)(void *); 157 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 158 { &vop_default_desc, vn_default_error }, 159 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 160 { &vop_create_desc, spec_create }, /* genfs_badop */ 161 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 162 { &vop_open_desc, spec_open }, /* spec_open */ 163 { &vop_close_desc, spec_close }, /* spec_close */ 164 { &vop_access_desc, puffs_checkop }, /* access */ 165 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 166 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 167 { &vop_read_desc, puffs_spec_read }, /* update, read */ 168 { &vop_write_desc, puffs_spec_write }, /* update, write */ 169 { &vop_lease_desc, spec_lease_check }, /* genfs_nullop */ 170 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 171 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 172 { &vop_poll_desc, spec_poll }, /* spec_poll */ 173 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 174 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 175 { &vop_mmap_desc, spec_mmap }, /* genfs_mmap (dummy) */ 176 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 177 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 178 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 179 { &vop_link_desc, spec_link }, /* genfs_badop */ 180 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 181 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 182 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 183 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 184 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 185 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 186 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 187 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 188 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 189 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 190 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 191 { &vop_bmap_desc, spec_bmap }, /* dummy */ 192 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 193 { &vop_print_desc, puffs_print }, /* REAL print */ 194 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 195 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 196 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 197 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 198 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 199 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 200 #if 0 201 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 202 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 203 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 204 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 205 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 206 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 207 #endif 208 { NULL, NULL } 209 }; 210 const struct vnodeopv_desc puffs_specop_opv_desc = 211 { &puffs_specop_p, puffs_specop_entries }; 212 213 214 int (**puffs_fifoop_p)(void *); 215 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 216 { &vop_default_desc, vn_default_error }, 217 { &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */ 218 { &vop_create_desc, fifo_create }, /* genfs_badop */ 219 { &vop_mknod_desc, fifo_mknod }, /* genfs_badop */ 220 { &vop_open_desc, fifo_open }, /* open */ 221 { &vop_close_desc, fifo_close }, /* close */ 222 { &vop_access_desc, puffs_checkop }, /* access */ 223 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 224 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 225 { &vop_read_desc, puffs_fifo_read }, /* read, update */ 226 { &vop_write_desc, puffs_fifo_write }, /* write, update */ 227 { &vop_lease_desc, fifo_lease_check }, /* genfs_nullop */ 228 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 229 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 230 { &vop_poll_desc, fifo_poll }, /* poll */ 231 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 232 { &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */ 233 { &vop_mmap_desc, fifo_mmap }, /* genfs_badop */ 234 { &vop_fsync_desc, puffs_checkop }, /* fsync */ 235 { &vop_seek_desc, fifo_seek }, /* genfs_badop */ 236 { &vop_remove_desc, fifo_remove }, /* genfs_badop */ 237 { &vop_link_desc, fifo_link }, /* genfs_badop */ 238 { &vop_rename_desc, fifo_rename }, /* genfs_badop */ 239 { &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */ 240 { &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */ 241 { &vop_symlink_desc, fifo_symlink }, /* genfs_badop */ 242 { &vop_readdir_desc, fifo_readdir }, /* genfs_badop */ 243 { &vop_readlink_desc, fifo_readlink }, /* genfs_badop */ 244 { &vop_abortop_desc, fifo_abortop }, /* genfs_badop */ 245 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 246 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 247 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 248 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 249 { &vop_bmap_desc, fifo_bmap }, /* dummy */ 250 { &vop_strategy_desc, fifo_strategy }, /* genfs_badop */ 251 { &vop_print_desc, puffs_print }, /* REAL print */ 252 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 253 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 254 { &vop_advlock_desc, fifo_advlock }, /* genfs_einval */ 255 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 256 { &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/ 257 #if 0 258 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 259 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 260 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 261 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 262 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 263 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 264 #endif 265 { NULL, NULL } 266 }; 267 const struct vnodeopv_desc puffs_fifoop_opv_desc = 268 { &puffs_fifoop_p, puffs_fifoop_entries }; 269 270 271 /* "real" vnode operations */ 272 int (**puffs_msgop_p)(void *); 273 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 274 { &vop_default_desc, vn_default_error }, 275 { &vop_create_desc, puffs_create }, /* create */ 276 { &vop_mknod_desc, puffs_mknod }, /* mknod */ 277 { &vop_open_desc, puffs_open }, /* open */ 278 { &vop_close_desc, puffs_close }, /* close */ 279 { &vop_access_desc, puffs_access }, /* access */ 280 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 281 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 282 { &vop_read_desc, puffs_read }, /* read */ 283 { &vop_write_desc, puffs_write }, /* write */ 284 { &vop_fcntl_desc, puffs_fcntl }, /* fcntl */ 285 { &vop_ioctl_desc, puffs_ioctl }, /* ioctl */ 286 { &vop_fsync_desc, puffs_fsync }, /* fsync */ 287 { &vop_seek_desc, puffs_seek }, /* seek */ 288 { &vop_remove_desc, puffs_remove }, /* remove */ 289 { &vop_link_desc, puffs_link }, /* link */ 290 { &vop_rename_desc, puffs_rename }, /* rename */ 291 { &vop_mkdir_desc, puffs_mkdir }, /* mkdir */ 292 { &vop_rmdir_desc, puffs_rmdir }, /* rmdir */ 293 { &vop_symlink_desc, puffs_symlink }, /* symlink */ 294 { &vop_readdir_desc, puffs_readdir }, /* readdir */ 295 { &vop_readlink_desc, puffs_readlink }, /* readlink */ 296 { &vop_print_desc, puffs_print }, /* print */ 297 { &vop_islocked_desc, puffs_islocked }, /* islocked */ 298 { &vop_pathconf_desc, puffs_pathconf }, /* pathconf */ 299 { &vop_advlock_desc, puffs_advlock }, /* advlock */ 300 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 301 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 302 { NULL, NULL } 303 }; 304 const struct vnodeopv_desc puffs_msgop_opv_desc = 305 { &puffs_msgop_p, puffs_msgop_entries }; 306 307 308 #define LOCKEDVP(a) (VOP_ISLOCKED(a) ? (a) : NULL) 309 310 311 /* 312 * This is a generic vnode operation handler. It checks if the necessary 313 * operations for the called vnode operation are implemented by userspace 314 * and either returns a dummy return value or proceeds to call the real 315 * vnode operation from puffs_msgop_v. 316 * 317 * XXX: this should described elsewhere and autogenerated, the complexity 318 * of the vnode operations vectors and their interrelationships is also 319 * getting a bit out of hand. Another problem is that we need this same 320 * information in the fs server code, so keeping the two in sync manually 321 * is not a viable (long term) plan. 322 */ 323 324 /* not supported, handle locking protocol */ 325 #define CHECKOP_NOTSUPP(op) \ 326 case VOP_##op##_DESCOFFSET: \ 327 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 328 return genfs_eopnotsupp(v); \ 329 break 330 331 /* always succeed, no locking */ 332 #define CHECKOP_SUCCESS(op) \ 333 case VOP_##op##_DESCOFFSET: \ 334 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 335 return 0; \ 336 break 337 338 int 339 puffs_checkop(void *v) 340 { 341 struct vop_generic_args /* { 342 struct vnodeop_desc *a_desc; 343 spooky mystery contents; 344 } */ *ap = v; 345 struct vnodeop_desc *desc = ap->a_desc; 346 struct puffs_mount *pmp; 347 struct vnode *vp; 348 int offset; 349 350 DPRINTF_VERBOSE(("checkop call %s (%d)\n", 351 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset)); 352 353 offset = ap->a_desc->vdesc_vp_offsets[0]; 354 #ifdef DIAGNOSTIC 355 if (offset == VDESC_NO_OFFSET) 356 panic("puffs_checkop: no vnode, why did you call me?"); 357 #endif 358 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 359 pmp = MPTOPUFFSMP(vp->v_mount); 360 361 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOPS) == 0) { 362 switch (desc->vdesc_offset) { 363 CHECKOP_NOTSUPP(CREATE); 364 CHECKOP_NOTSUPP(MKNOD); 365 CHECKOP_NOTSUPP(GETATTR); 366 CHECKOP_NOTSUPP(SETATTR); 367 CHECKOP_NOTSUPP(READ); 368 CHECKOP_NOTSUPP(WRITE); 369 CHECKOP_NOTSUPP(FCNTL); 370 CHECKOP_NOTSUPP(IOCTL); 371 CHECKOP_NOTSUPP(REMOVE); 372 CHECKOP_NOTSUPP(LINK); 373 CHECKOP_NOTSUPP(RENAME); 374 CHECKOP_NOTSUPP(MKDIR); 375 CHECKOP_NOTSUPP(RMDIR); 376 CHECKOP_NOTSUPP(SYMLINK); 377 CHECKOP_NOTSUPP(READDIR); 378 CHECKOP_NOTSUPP(READLINK); 379 CHECKOP_NOTSUPP(PRINT); 380 CHECKOP_NOTSUPP(PATHCONF); 381 CHECKOP_NOTSUPP(ADVLOCK); 382 383 CHECKOP_SUCCESS(OPEN); 384 CHECKOP_SUCCESS(CLOSE); 385 CHECKOP_SUCCESS(ACCESS); 386 CHECKOP_SUCCESS(SEEK); 387 388 /* XXXfixme: read w/o write && cache == bad bad bad */ 389 case VOP_GETPAGES_DESCOFFSET: 390 if (!EXISTSOP(pmp, READ)) 391 return genfs_eopnotsupp(v); 392 break; 393 394 case VOP_PUTPAGES_DESCOFFSET: 395 if (!EXISTSOP(pmp, WRITE)) 396 return genfs_null_putpages(v); 397 break; 398 399 default: 400 panic("puffs_checkop: unhandled vnop %d", 401 desc->vdesc_offset); 402 } 403 } 404 405 return VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 406 } 407 408 409 int 410 puffs_lookup(void *v) 411 { 412 struct vop_lookup_args /* { 413 const struct vnodeop_desc *a_desc; 414 struct vnode *a_dvp; 415 struct vnode **a_vpp; 416 struct componentname *a_cnp; 417 } */ *ap = v; 418 struct puffs_mount *pmp; 419 struct componentname *cnp; 420 struct vnode *vp, *dvp; 421 struct puffs_node *dpn; 422 int isdot; 423 int error; 424 425 PUFFS_VNREQ(lookup); 426 427 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 428 cnp = ap->a_cnp; 429 dvp = ap->a_dvp; 430 *ap->a_vpp = NULL; 431 432 /* first things first: check access */ 433 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 434 if (error) 435 return error; 436 437 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 438 439 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %lx\n", 440 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 441 442 /* 443 * Check if someone fed it into the cache 444 */ 445 if (PUFFS_DOCACHE(pmp)) { 446 error = cache_lookup(dvp, ap->a_vpp, cnp); 447 448 if (error >= 0) 449 return error; 450 } 451 452 if (isdot) { 453 vp = ap->a_dvp; 454 vref(vp); 455 *ap->a_vpp = vp; 456 return 0; 457 } 458 459 puffs_makecn(&lookup_arg.pvnr_cn, cnp); 460 461 if (cnp->cn_flags & ISDOTDOT) 462 VOP_UNLOCK(dvp, 0); 463 464 error = puffs_vntouser(pmp, PUFFS_VN_LOOKUP, 465 &lookup_arg, sizeof(lookup_arg), VPTOPNC(dvp), LOCKEDVP(dvp), NULL); 466 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 467 468 /* 469 * In case of error, there is no new vnode to play with, so be 470 * happy with the NULL value given to vpp in the beginning. 471 * Also, check if this really was an error or the target was not 472 * present. Either treat it as a non-error for CREATE/RENAME or 473 * enter the component into the negative name cache (if desired). 474 */ 475 if (error) { 476 if (error == ENOENT) { 477 if ((cnp->cn_flags & ISLASTCN) 478 && (cnp->cn_nameiop == CREATE 479 || cnp->cn_nameiop == RENAME)) { 480 cnp->cn_flags |= SAVENAME; 481 error = EJUSTRETURN; 482 } else { 483 if ((cnp->cn_flags & MAKEENTRY) 484 && PUFFS_DOCACHE(pmp)) 485 cache_enter(dvp, NULL, cnp); 486 } 487 } 488 goto errout; 489 } 490 491 /* 492 * Check that we don't get our parent node back, that would cause 493 * a pretty obvious deadlock. 494 */ 495 dpn = dvp->v_data; 496 if (lookup_arg.pvnr_newnode == dpn->pn_cookie) { 497 error = EINVAL; 498 goto errout; 499 } 500 501 /* XXX: race here */ 502 vp = puffs_pnode2vnode(pmp, lookup_arg.pvnr_newnode, 1); 503 if (!vp) { 504 error = puffs_getvnode(dvp->v_mount, 505 lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype, 506 lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp); 507 if (error) { 508 goto errout; 509 } 510 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 511 } 512 *ap->a_vpp = vp; 513 514 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_DOCACHE(pmp)) 515 cache_enter(dvp, vp, cnp); 516 517 errout: 518 if (cnp->cn_flags & ISDOTDOT) 519 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 520 521 return error; 522 } 523 524 int 525 puffs_create(void *v) 526 { 527 struct vop_create_args /* { 528 const struct vnodeop_desc *a_desc; 529 struct vnode *a_dvp; 530 struct vnode **a_vpp; 531 struct componentname *a_cnp; 532 struct vattr *a_vap; 533 } */ *ap = v; 534 int error; 535 536 PUFFS_VNREQ(create); 537 538 puffs_makecn(&create_arg.pvnr_cn, ap->a_cnp); 539 create_arg.pvnr_va = *ap->a_vap; 540 541 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_CREATE, 542 &create_arg, sizeof(create_arg), VPTOPNC(ap->a_dvp), 543 ap->a_dvp, NULL); 544 if (error) 545 goto out; 546 547 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 548 create_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 0); 549 550 out: 551 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 552 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 553 vput(ap->a_dvp); 554 return error; 555 } 556 557 int 558 puffs_mknod(void *v) 559 { 560 struct vop_mknod_args /* { 561 const struct vnodeop_desc *a_desc; 562 struct vnode *a_dvp; 563 struct vnode **a_vpp; 564 struct componentname *a_cnp; 565 struct vattr *a_vap; 566 } */ *ap = v; 567 int error; 568 569 PUFFS_VNREQ(mknod); 570 571 puffs_makecn(&mknod_arg.pvnr_cn, ap->a_cnp); 572 mknod_arg.pvnr_va = *ap->a_vap; 573 574 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKNOD, 575 &mknod_arg, sizeof(mknod_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 576 if (error) 577 goto out; 578 579 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 580 mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 581 ap->a_vap->va_rdev); 582 583 out: 584 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 585 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 586 vput(ap->a_dvp); 587 return error; 588 } 589 590 int 591 puffs_open(void *v) 592 { 593 struct vop_open_args /* { 594 const struct vnodeop_desc *a_desc; 595 struct vnode *a_vp; 596 int a_mode; 597 kauth_cred_t a_cred; 598 struct lwp *a_l; 599 } */ *ap = v; 600 601 PUFFS_VNREQ(open); 602 603 open_arg.pvnr_mode = ap->a_mode; 604 puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred); 605 open_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 606 607 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_OPEN, 608 &open_arg, sizeof(open_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 609 } 610 611 int 612 puffs_close(void *v) 613 { 614 struct vop_close_args /* { 615 const struct vnodeop_desc *a_desc; 616 struct vnode *a_vp; 617 int a_fflag; 618 kauth_cred_t a_cred; 619 struct lwp *a_l; 620 } */ *ap = v; 621 622 PUFFS_VNREQ(close); 623 624 close_arg.pvnr_fflag = ap->a_fflag; 625 puffs_credcvt(&close_arg.pvnr_cred, ap->a_cred); 626 close_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 627 628 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 629 &close_arg, sizeof(close_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 630 } 631 632 int 633 puffs_access(void *v) 634 { 635 struct vop_access_args /* { 636 const struct vnodeop_desc *a_desc; 637 struct vnode *a_vp; 638 int a_mode; 639 kauth_cred_t a_cred; 640 struct lwp *a_l; 641 } */ *ap = v; 642 643 PUFFS_VNREQ(access); 644 645 access_arg.pvnr_mode = ap->a_mode; 646 access_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 647 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 648 649 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ACCESS, 650 &access_arg, sizeof(access_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 651 } 652 653 int 654 puffs_getattr(void *v) 655 { 656 struct vop_getattr_args /* { 657 const struct vnodeop_desc *a_desc; 658 struct vnode *a_vp; 659 struct vattr *a_vap; 660 kauth_cred_t a_cred; 661 struct lwp *a_l; 662 } */ *ap = v; 663 struct mount *mp; 664 int error; 665 666 PUFFS_VNREQ(getattr); 667 668 mp = ap->a_vp->v_mount; 669 670 vattr_null(&getattr_arg.pvnr_va); 671 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 672 getattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 673 674 /* 675 * XXX + XX (dos equis): this can't go through the unlock/lock 676 * cycle, since it can be called from uvn_attach(), which fiddles 677 * around with VXLOCK and therefore breaks vn_lock(). Proper 678 * fix pending. 679 */ 680 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_GETATTR, 681 &getattr_arg, sizeof(getattr_arg), VPTOPNC(ap->a_vp), 682 NULL /* XXXseeabove: should be LOCKEDVP(ap->a_vp) */, NULL); 683 if (error) 684 return error; 685 686 (void)memcpy(ap->a_vap, &getattr_arg.pvnr_va, sizeof(struct vattr)); 687 688 /* 689 * fill in information userspace does not have 690 * XXX: but would it be better to do fsid at the generic level? 691 */ 692 ap->a_vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 693 694 return 0; 695 } 696 697 int 698 puffs_setattr(void *v) 699 { 700 struct vop_getattr_args /* { 701 const struct vnodeop_desc *a_desc; 702 struct vnode *a_vp; 703 struct vattr *a_vap; 704 kauth_cred_t a_cred; 705 struct lwp *a_l; 706 } */ *ap = v; 707 int error; 708 709 PUFFS_VNREQ(setattr); 710 711 (void)memcpy(&setattr_arg.pvnr_va, ap->a_vap, sizeof(struct vattr)); 712 puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred); 713 setattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 714 715 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR, 716 &setattr_arg, sizeof(setattr_arg), VPTOPNC(ap->a_vp), 717 ap->a_vp, NULL); 718 if (error) 719 return error; 720 721 if (ap->a_vap->va_size != VNOVAL) 722 uvm_vnp_setsize(ap->a_vp, ap->a_vap->va_size); 723 724 return 0; 725 } 726 727 int 728 puffs_revoke(void *v) 729 { 730 struct vop_revoke_args /* { 731 const struct vnodeop_desc *a_desc; 732 struct vnode *a_vp; 733 int a_flags; 734 } */ *ap = v; 735 struct puffs_mount *pmp; 736 737 PUFFS_VNREQ(revoke); 738 739 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 740 741 revoke_arg.pvnr_flags = ap->a_flags; 742 743 /* don't really care if userspace doesn't want to play along */ 744 if (EXISTSOP(pmp, REVOKE)) 745 puffs_vntouser(pmp, PUFFS_VN_REVOKE, 746 &revoke_arg, sizeof(revoke_arg), VPTOPNC(ap->a_vp), 747 NULL, NULL); 748 749 return genfs_revoke(v); 750 } 751 752 /* 753 * There is no technical need to have this travel to userspace 754 * synchronously. So once async reply support is in place, make this 755 * async. 756 */ 757 int 758 puffs_inactive(void *v) 759 { 760 struct vop_inactive_args /* { 761 const struct vnodeop_desc *a_desc; 762 struct vnode *a_vp; 763 struct lwp *a_l; 764 } */ *ap = v; 765 struct puffs_mount *pmp; 766 struct puffs_node *pnode; 767 int rv, vnrefs; 768 769 PUFFS_VNREQ(inactive); 770 771 /* 772 * XXX: think about this after we really start unlocking 773 * when going to userspace 774 */ 775 pnode = ap->a_vp->v_data; 776 777 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 778 779 inactive_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 780 781 if (EXISTSOP(pmp, INACTIVE)) 782 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 783 &inactive_arg, sizeof(inactive_arg), VPTOPNC(ap->a_vp), 784 ap->a_vp, NULL); 785 else 786 rv = 1; /* see below */ 787 788 /* can't trust userspace return value? simulate safe answer */ 789 if (rv) 790 vnrefs = 1; 791 else 792 vnrefs = inactive_arg.pvnr_backendrefs; 793 794 VOP_UNLOCK(ap->a_vp, 0); 795 796 /* 797 * user server thinks it's gone? then don't be afraid care, 798 * node's life was already all it would ever be 799 */ 800 if (vnrefs == 0) 801 vrecycle(ap->a_vp, NULL, ap->a_l); 802 803 return 0; 804 } 805 806 int 807 puffs_reclaim(void *v) 808 { 809 struct vop_reclaim_args /* { 810 const struct vnodeop_desc *a_desc; 811 struct vnode *a_vp; 812 struct lwp *a_l; 813 } */ *ap = v; 814 struct puffs_mount *pmp; 815 int error; 816 817 PUFFS_VNREQ(reclaim); 818 819 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 820 821 /* 822 * first things first: check if someone is trying to reclaim the 823 * root vnode. do not allow that to travel to userspace. 824 * Note that we don't need to take the lock similarly to 825 * puffs_root(), since there is only one of us. 826 */ 827 if (ap->a_vp->v_flag & VROOT) { 828 #ifdef DIAGNOSTIC 829 simple_lock(&pmp->pmp_lock); 830 if (pmp->pmp_root == NULL) 831 panic("puffs_reclaim: releasing root vnode (%p) twice", 832 ap->a_vp); 833 simple_unlock(&pmp->pmp_lock); 834 #endif 835 pmp->pmp_root = NULL; 836 puffs_putvnode(ap->a_vp); 837 return 0; 838 } 839 840 reclaim_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 841 842 if (EXISTSOP(pmp, RECLAIM)) 843 error = puffs_vntouser(pmp, PUFFS_VN_RECLAIM, 844 &reclaim_arg, sizeof(reclaim_arg), VPTOPNC(ap->a_vp), 845 NULL, NULL); 846 else 847 error = 0; 848 #if 0 849 /* 850 * XXX: if reclaim fails for any other reason than the userspace 851 * being dead, we should consider unmounting the filesystem, since 852 * we can't trust it to be in a consistent state anymore. But for 853 * now, just ignore all errors. 854 */ 855 if (error) 856 return error; 857 #endif 858 859 if (PUFFS_DOCACHE(pmp)) 860 cache_purge(ap->a_vp); 861 puffs_putvnode(ap->a_vp); 862 863 return 0; 864 } 865 866 int 867 puffs_readdir(void *v) 868 { 869 struct vop_readdir_args /* { 870 const struct vnodeop_desc *a_desc; 871 struct vnode *a_vp; 872 struct uio *a_uio; 873 kauth_cred_t a_cred; 874 int *a_eofflag; 875 off_t **a_cookies; 876 int *a_ncookies; 877 } */ *ap = v; 878 struct puffs_vnreq_readdir *readdir_argp; 879 size_t argsize; 880 struct uio *uio = ap->a_uio; 881 size_t howmuch; 882 int error; 883 884 /* worry about these later */ 885 if (!(ap->a_cookies == NULL && ap->a_ncookies == NULL)) 886 return EOPNOTSUPP; 887 888 argsize = sizeof(struct puffs_vnreq_readdir); 889 readdir_argp = malloc(argsize, M_PUFFS, M_ZERO | M_WAITOK); 890 891 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 892 readdir_argp->pvnr_offset = uio->uio_offset; 893 readdir_argp->pvnr_resid = uio->uio_resid; 894 895 error = puffs_vntouser_adjbuf(MPTOPUFFSMP(ap->a_vp->v_mount), 896 PUFFS_VN_READDIR, (void **)&readdir_argp, &argsize, 897 readdir_argp->pvnr_resid, VPTOPNC(ap->a_vp), ap->a_vp, NULL); 898 if (error) 899 goto out; 900 901 /* userspace is cheating? */ 902 if (readdir_argp->pvnr_resid > uio->uio_resid) { 903 error = EINVAL; 904 goto out; 905 } 906 907 /* bouncy-wouncy with the directory data */ 908 howmuch = uio->uio_resid - readdir_argp->pvnr_resid; 909 /* XXX: we could let userlandia tell its opinion first time 'round */ 910 if (howmuch == 0) { 911 *ap->a_eofflag = 1; 912 goto out; 913 } 914 error = uiomove(readdir_argp->pvnr_dent, howmuch, uio); 915 if (error) 916 goto out; 917 uio->uio_offset = readdir_argp->pvnr_offset; 918 919 out: 920 free(readdir_argp, M_PUFFS); 921 return error; 922 } 923 924 int 925 puffs_poll(void *v) 926 { 927 struct vop_poll_args /* { 928 const struct vnodeop_desc *a_desc; 929 struct vnode *a_vp; 930 int a_events; 931 struct lwp *a_l; 932 }*/ *ap = v; 933 934 PUFFS_VNREQ(poll); 935 936 poll_arg.pvnr_events = ap->a_events; 937 poll_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 938 939 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_POLL, 940 &poll_arg, sizeof(poll_arg), VPTOPNC(ap->a_vp), NULL, NULL); 941 } 942 943 int 944 puffs_fsync(void *v) 945 { 946 struct vop_fsync_args /* { 947 const struct vnodeop_desc *a_desc; 948 struct vnode *a_vp; 949 kauth_cred_t a_cred; 950 int a_flags; 951 off_t a_offlo; 952 off_t a_offhi; 953 struct lwp *a_l; 954 } */ *ap = v; 955 struct puffs_mount *pmp; 956 struct puffs_vnreq_fsync *fsync_argp; 957 struct vnode *vp; 958 int pflags, error; 959 960 PUFFS_VNREQ(fsync); 961 962 vp = ap->a_vp; 963 pmp = MPTOPUFFSMP(vp->v_mount); 964 965 pflags = PGO_CLEANIT; 966 if (ap->a_flags & FSYNC_WAIT) 967 pflags |= PGO_SYNCIO; 968 969 /* 970 * flush pages to avoid being overly dirty 971 */ 972 simple_lock(&vp->v_interlock); 973 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 974 round_page(ap->a_offhi), pflags); 975 if (error) 976 return error; 977 978 /* 979 * HELLO! We exit already here if the user server does not 980 * support fsync. Otherwise we continue to issue fsync() 981 * forward. 982 */ 983 984 if (!EXISTSOP(pmp, FSYNC)) 985 return 0; 986 987 if (ap->a_flags & FSYNC_WAIT) { 988 fsync_argp = &fsync_arg; 989 } else { 990 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 991 M_PUFFS, M_ZERO | M_NOWAIT); 992 if (fsync_argp == NULL) 993 return ENOMEM; 994 } 995 996 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 997 fsync_argp->pvnr_flags = ap->a_flags; 998 fsync_argp->pvnr_offlo = ap->a_offlo; 999 fsync_argp->pvnr_offhi = ap->a_offhi; 1000 fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 1001 1002 /* 1003 * XXX: see comment at puffs_getattr about locking 1004 * 1005 * If we are not required to wait, do a FAF operation. 1006 * Otherwise block here. 1007 */ 1008 if (ap->a_flags & FSYNC_WAIT) { 1009 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1010 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 1011 VPTOPNC(vp), NULL /* XXXshouldbe: vp */, NULL); 1012 } else { 1013 /* FAF is always "succesful" */ 1014 error = 0; 1015 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1016 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 1017 VPTOPNC(vp)); 1018 } 1019 1020 return error; 1021 } 1022 1023 int 1024 puffs_seek(void *v) 1025 { 1026 struct vop_seek_args /* { 1027 const struct vnodeop_desc *a_desc; 1028 struct vnode *a_vp; 1029 off_t a_oldoff; 1030 off_t a_newoff; 1031 kauth_cred_t a_cred; 1032 } */ *ap = v; 1033 1034 PUFFS_VNREQ(seek); 1035 1036 seek_arg.pvnr_oldoff = ap->a_oldoff; 1037 seek_arg.pvnr_newoff = ap->a_newoff; 1038 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1039 1040 /* 1041 * XXX: seems like seek is called with an unlocked vp, but 1042 * it can't hurt to play safe 1043 */ 1044 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1045 &seek_arg, sizeof(seek_arg), VPTOPNC(ap->a_vp), 1046 LOCKEDVP(ap->a_vp), NULL); 1047 } 1048 1049 int 1050 puffs_remove(void *v) 1051 { 1052 struct vop_remove_args /* { 1053 const struct vnodeop_desc *a_desc; 1054 struct vnode *a_dvp; 1055 struct vnode *a_vp; 1056 struct componentname *a_cnp; 1057 } */ *ap = v; 1058 int error; 1059 1060 PUFFS_VNREQ(remove); 1061 1062 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1063 puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp); 1064 1065 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE, 1066 &remove_arg, sizeof(remove_arg), VPTOPNC(ap->a_dvp), 1067 ap->a_dvp, ap->a_vp); 1068 1069 vput(ap->a_vp); 1070 if (ap->a_dvp == ap->a_vp) 1071 vrele(ap->a_dvp); 1072 else 1073 vput(ap->a_dvp); 1074 1075 return error; 1076 } 1077 1078 int 1079 puffs_mkdir(void *v) 1080 { 1081 struct vop_mkdir_args /* { 1082 const struct vnodeop_desc *a_desc; 1083 struct vnode *a_dvp; 1084 struct vnode **a_vpp; 1085 struct componentname *a_cnp; 1086 struct vattr *a_vap; 1087 } */ *ap = v; 1088 int error; 1089 1090 PUFFS_VNREQ(mkdir); 1091 1092 puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp); 1093 mkdir_arg.pvnr_va = *ap->a_vap; 1094 1095 /* XXX: wouldn't need to relock dvp, but that's life */ 1096 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR, 1097 &mkdir_arg, sizeof(mkdir_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1098 if (error) 1099 goto out; 1100 1101 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1102 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1103 1104 out: 1105 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1106 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1107 vput(ap->a_dvp); 1108 return error; 1109 } 1110 1111 int 1112 puffs_rmdir(void *v) 1113 { 1114 struct vop_rmdir_args /* { 1115 const struct vnodeop_desc *a_desc; 1116 struct vnode *a_dvp; 1117 struct vnode *a_vp; 1118 struct componentname *a_cnp; 1119 } */ *ap = v; 1120 int error; 1121 1122 PUFFS_VNREQ(rmdir); 1123 1124 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1125 puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp); 1126 1127 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR, 1128 &rmdir_arg, sizeof(rmdir_arg), VPTOPNC(ap->a_dvp), 1129 ap->a_dvp, ap->a_vp); 1130 1131 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1132 1133 vput(ap->a_dvp); 1134 vput(ap->a_vp); 1135 1136 return error; 1137 } 1138 1139 int 1140 puffs_link(void *v) 1141 { 1142 struct vop_link_args /* { 1143 const struct vnodeop_desc *a_desc; 1144 struct vnode *a_dvp; 1145 struct vnode *a_vp; 1146 struct componentname *a_cnp; 1147 }*/ *ap = v; 1148 int error; 1149 1150 PUFFS_VNREQ(link); 1151 1152 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1153 puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp); 1154 1155 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK, 1156 &link_arg, sizeof(link_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1157 1158 vput(ap->a_dvp); 1159 1160 return error; 1161 } 1162 1163 int 1164 puffs_symlink(void *v) 1165 { 1166 struct vop_symlink_args /* { 1167 const struct vnodeop_desc *a_desc; 1168 struct vnode *a_dvp; 1169 struct vnode **a_vpp; 1170 struct componentname *a_cnp; 1171 struct vattr *a_vap; 1172 char *a_target; 1173 }*/ *ap = v; 1174 int error; 1175 1176 PUFFS_VNREQ(symlink); /* XXX: large structure */ 1177 1178 *ap->a_vpp = NULL; 1179 1180 puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp); 1181 symlink_arg.pvnr_va = *ap->a_vap; 1182 (void)strlcpy(symlink_arg.pvnr_link, ap->a_target, 1183 sizeof(symlink_arg.pvnr_link)); 1184 1185 /* XXX: don't need to relock parent */ 1186 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), 1187 PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg), 1188 VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1189 if (error) 1190 goto out; 1191 1192 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1193 symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0); 1194 1195 out: 1196 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1197 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1198 vput(ap->a_dvp); 1199 return error; 1200 } 1201 1202 int 1203 puffs_readlink(void *v) 1204 { 1205 struct vop_readlink_args /* { 1206 const struct vnodeop_desc *a_desc; 1207 struct vnode *a_vp; 1208 struct uio *a_uio; 1209 kauth_cred_t a_cred; 1210 } */ *ap = v; 1211 int error; 1212 1213 PUFFS_VNREQ(readlink); 1214 1215 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1216 readlink_arg.pvnr_linklen = sizeof(readlink_arg.pvnr_link); 1217 1218 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1219 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 1220 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1221 if (error) 1222 return error; 1223 1224 readlink_arg.pvnr_link[readlink_arg.pvnr_linklen] = '\0'; 1225 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1226 ap->a_uio); 1227 } 1228 1229 /* XXXXXXX: think about locking & userspace op delocking... */ 1230 int 1231 puffs_rename(void *v) 1232 { 1233 struct vop_rename_args /* { 1234 const struct vnodeop_desc *a_desc; 1235 struct vnode *a_fdvp; 1236 struct vnode *a_fvp; 1237 struct componentname *a_fcnp; 1238 struct vnode *a_tdvp; 1239 struct vnode *a_tvp; 1240 struct componentname *a_tcnp; 1241 }*/ *ap = v; 1242 int error; 1243 1244 PUFFS_VNREQ(rename); 1245 1246 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) { 1247 error = EXDEV; 1248 goto out; 1249 } 1250 1251 rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1252 rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1253 if (ap->a_tvp) 1254 rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1255 else 1256 rename_arg.pvnr_cookie_targ = NULL; 1257 puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp); 1258 puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp); 1259 1260 error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount), 1261 PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg), 1262 VPTOPNC(ap->a_fdvp), NULL, NULL); 1263 1264 out: 1265 if (ap->a_tvp != NULL) 1266 vput(ap->a_tvp); 1267 if (ap->a_tdvp == ap->a_tvp) 1268 vrele(ap->a_tdvp); 1269 else 1270 vput(ap->a_tdvp); 1271 1272 vrele(ap->a_fdvp); 1273 vrele(ap->a_fvp); 1274 1275 return error; 1276 } 1277 1278 int 1279 puffs_read(void *v) 1280 { 1281 struct vop_read_args /* { 1282 const struct vnodeop_desc *a_desc; 1283 struct vnode *a_vp; 1284 struct uio *a_uio; 1285 int a_ioflag; 1286 kauth_cred_t a_cred; 1287 } */ *ap = v; 1288 struct puffs_vnreq_read *read_argp; 1289 struct puffs_mount *pmp; 1290 struct vnode *vp; 1291 struct uio *uio; 1292 void *win; 1293 size_t tomove, argsize; 1294 vsize_t bytelen; 1295 int error, ubcflags; 1296 1297 uio = ap->a_uio; 1298 vp = ap->a_vp; 1299 read_argp = NULL; 1300 error = 0; 1301 pmp = MPTOPUFFSMP(vp->v_mount); 1302 1303 /* std sanity */ 1304 if (uio->uio_resid == 0) 1305 return 0; 1306 if (uio->uio_offset < 0) 1307 return EINVAL; 1308 1309 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1310 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1311 1312 ubcflags = 0; 1313 if (UBC_WANT_UNMAP(vp)) 1314 ubcflags = UBC_UNMAP; 1315 1316 while (uio->uio_resid > 0) { 1317 bytelen = MIN(uio->uio_resid, 1318 vp->v_size - uio->uio_offset); 1319 if (bytelen == 0) 1320 break; 1321 1322 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1323 &bytelen, advice, UBC_READ); 1324 error = uiomove(win, bytelen, uio); 1325 ubc_release(win, ubcflags); 1326 if (error) 1327 break; 1328 } 1329 1330 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1331 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1332 } else { 1333 /* 1334 * in case it's not a regular file or we're operating 1335 * uncached, do read in the old-fashioned style, 1336 * i.e. explicit read operations 1337 */ 1338 1339 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1340 argsize = sizeof(struct puffs_vnreq_read); 1341 read_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1342 1343 error = 0; 1344 while (uio->uio_resid > 0) { 1345 read_argp->pvnr_ioflag = ap->a_ioflag; 1346 read_argp->pvnr_resid = tomove; 1347 read_argp->pvnr_offset = uio->uio_offset; 1348 puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred); 1349 1350 argsize = sizeof(struct puffs_vnreq_read); 1351 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1352 (void **)&read_argp, &argsize, 1353 read_argp->pvnr_resid, VPTOPNC(ap->a_vp), 1354 ap->a_vp, NULL); 1355 if (error) 1356 break; 1357 1358 if (read_argp->pvnr_resid > tomove) { 1359 error = EINVAL; 1360 break; 1361 } 1362 1363 error = uiomove(read_argp->pvnr_data, 1364 tomove - read_argp->pvnr_resid, uio); 1365 1366 /* 1367 * in case the file is out of juice, resid from 1368 * userspace is != 0. and the error-case is 1369 * quite obvious 1370 */ 1371 if (error || read_argp->pvnr_resid) 1372 break; 1373 1374 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1375 } 1376 } 1377 1378 if (read_argp) 1379 free(read_argp, M_PUFFS); 1380 return error; 1381 } 1382 1383 int 1384 puffs_write(void *v) 1385 { 1386 struct vop_write_args /* { 1387 const struct vnodeop_desc *a_desc; 1388 struct vnode *a_vp; 1389 struct uio *a_uio; 1390 int a_ioflag; 1391 kauth_cred_t a_cred; 1392 }*/ *ap = v; 1393 struct puffs_vnreq_write *write_argp; 1394 struct puffs_mount *pmp; 1395 struct uio *uio; 1396 struct vnode *vp; 1397 void *win; 1398 size_t tomove, argsize; 1399 off_t oldoff, newoff, origoff; 1400 vsize_t bytelen; 1401 int error, uflags; 1402 int async, ubcflags; 1403 1404 vp = ap->a_vp; 1405 uio = ap->a_uio; 1406 async = vp->v_mount->mnt_flag & MNT_ASYNC; 1407 error = uflags = 0; 1408 write_argp = NULL; 1409 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1410 1411 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1412 ubcflags = 0; 1413 if (UBC_WANT_UNMAP(vp)) 1414 ubcflags = UBC_UNMAP; 1415 1416 /* 1417 * userspace *should* be allowed to control this, 1418 * but with UBC it's a bit unclear how to handle it 1419 */ 1420 if (ap->a_ioflag & IO_APPEND) 1421 uio->uio_offset = vp->v_size; 1422 1423 origoff = uio->uio_offset; 1424 while (uio->uio_resid > 0) { 1425 uflags |= PUFFS_UPDATECTIME; 1426 uflags |= PUFFS_UPDATEMTIME; 1427 oldoff = uio->uio_offset; 1428 bytelen = uio->uio_resid; 1429 1430 win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, 1431 UVM_ADV_NORMAL, UBC_WRITE); 1432 error = uiomove(win, bytelen, uio); 1433 1434 /* 1435 * did we grow the file? 1436 * XXX: should probably ask userspace to extend 1437 * it's idea of the *first* before growing it 1438 * here. Or we need some mechanism to "rollback" 1439 * in case putpages fails. 1440 */ 1441 newoff = oldoff + bytelen; 1442 if (vp->v_size < newoff) { 1443 uflags |= PUFFS_UPDATESIZE; 1444 uvm_vnp_setsize(vp, newoff); 1445 1446 /* 1447 * in case we couldn't copy data to the 1448 * window, zero it out so that we don't 1449 * have any random leftovers in there. 1450 */ 1451 if (error) 1452 memset(win, 0, bytelen); 1453 } 1454 1455 ubc_release(win, ubcflags); 1456 if (error) 1457 break; 1458 1459 /* ok, I really need to admit: why's this? */ 1460 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 1461 simple_lock(&vp->v_interlock); 1462 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1463 uio->uio_offset & ~0xffff, PGO_CLEANIT); 1464 if (error) 1465 break; 1466 } 1467 } 1468 1469 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1470 simple_lock(&vp->v_interlock); 1471 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1472 round_page(uio->uio_offset), 1473 PGO_CLEANIT | PGO_SYNCIO); 1474 } 1475 1476 puffs_updatenode(vp, uflags); 1477 } else { 1478 /* tomove is non-increasing */ 1479 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1480 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1481 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1482 1483 while (uio->uio_resid > 0) { 1484 write_argp->pvnr_ioflag = ap->a_ioflag; 1485 write_argp->pvnr_resid = tomove; 1486 write_argp->pvnr_offset = uio->uio_offset; 1487 puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred); 1488 error = uiomove(write_argp->pvnr_data, tomove, uio); 1489 if (error) 1490 break; 1491 1492 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1493 PUFFS_VN_WRITE, write_argp, argsize, 1494 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1495 if (error) { 1496 /* restore uiomove */ 1497 uio->uio_resid += tomove; 1498 uio->uio_offset -= tomove; 1499 break; 1500 } 1501 if (write_argp->pvnr_resid > tomove) { 1502 /* 1503 * XXX: correct file size is a mystery, 1504 * we can only guess 1505 */ 1506 error = EINVAL; 1507 break; 1508 } 1509 1510 /* adjust file size */ 1511 if (vp->v_size < uio->uio_offset) 1512 uvm_vnp_setsize(vp, uio->uio_offset); 1513 1514 /* didn't move everything? bad userspace. bail */ 1515 if (write_argp->pvnr_resid != 0) { 1516 uio->uio_resid += write_argp->pvnr_resid; 1517 uio->uio_offset -= write_argp->pvnr_resid; 1518 error = EIO; 1519 break; 1520 } 1521 1522 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1523 } 1524 } 1525 1526 if (write_argp) 1527 free(write_argp, M_PUFFS); 1528 return error; 1529 } 1530 1531 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1532 1533 #define FCNIOCTL_ARG_MAX 1<<16 1534 int 1535 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1536 { 1537 1538 /* currently not supported */ 1539 return EOPNOTSUPP; 1540 #if 0 1541 /* struct vop_ioctl_args { 1542 const struct vnodeop_desc *a_desc; 1543 struct vnode *a_vp; 1544 u_long a_command; 1545 void *a_data; 1546 int a_fflag; 1547 kauth_cred_t a_cred; 1548 struct lwp *a_l; 1549 }*ap = v; */ 1550 struct puffs_mount *pmp; 1551 struct puffs_sizepark pspark; 1552 void *kernbuf; 1553 size_t copylen; 1554 int error; 1555 1556 PUFFS_VNREQ(fcnioctl); 1557 1558 /* 1559 * Since this op gives the filesystem (almost) complete control on 1560 * how much it is allowed to copy from the calling process 1561 * address space, do not enable it by default, since it would 1562 * be a whopping security hole. 1563 */ 1564 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1565 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1566 return EINVAL; /* only shoe that fits */ 1567 1568 /* fill in sizereq and store it */ 1569 pspark.pkso_reqid = puffs_getreqid(pmp); 1570 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1571 pspark.pkso_copybuf = ap->a_data; 1572 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1573 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1574 1575 /* then fill in actual request and shoot it off */ 1576 fcnioctl_arg.pvnr_command = ap->a_command; 1577 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1578 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1579 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1580 1581 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1582 &fcnioctl_arg, sizeof(fcnioctl_arg), VPTOPNC(ap->a_vp), 1583 pspark.pkso_reqid, NULL, NULL); 1584 1585 /* if we don't need to copy data, we're done */ 1586 if (error || !fcnioctl_arg.pvnr_copyback) 1587 return error; 1588 1589 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1590 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1591 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1592 if (error) 1593 goto out; 1594 error = copyout(kernbuf, ap->a_data, copylen); 1595 1596 out: 1597 free(kernbuf, M_PUFFS); 1598 return error; 1599 #endif 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 int 1808 puffs_mmap(void *v) 1809 { 1810 struct vop_mmap_args /* { 1811 const struct vnodeop_desc *a_desc; 1812 struct vnode *a_vp; 1813 int a_fflags; 1814 kauth_cred_t a_cred; 1815 struct lwp *a_l; 1816 } */ *ap = v; 1817 struct puffs_mount *pmp; 1818 int error; 1819 1820 PUFFS_VNREQ(mmap); 1821 1822 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1823 1824 if (!PUFFS_DOCACHE(pmp)) 1825 return genfs_eopnotsupp(v); 1826 1827 if (EXISTSOP(pmp, MMAP)) { 1828 mmap_arg.pvnr_fflags = ap->a_fflags; 1829 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 1830 mmap_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1831 1832 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 1833 &mmap_arg, sizeof(mmap_arg), 1834 VPTOPNC(ap->a_vp), NULL, NULL); 1835 } else { 1836 error = genfs_mmap(v); 1837 } 1838 1839 return error; 1840 } 1841 1842 1843 /* 1844 * The rest don't get a free trip to userspace and back, they 1845 * have to stay within the kernel. 1846 */ 1847 1848 /* 1849 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 1850 * well, maybe somehow, somewhere, some day .... 1851 */ 1852 int 1853 puffs_bmap(void *v) 1854 { 1855 struct vop_bmap_args /* { 1856 const struct vnodeop_desc *a_desc; 1857 struct vnode *a_vp; 1858 daddr_t a_bn; 1859 struct vnode **a_vpp; 1860 daddr_t *a_bnp; 1861 int *a_runp; 1862 } */ *ap = v; 1863 struct puffs_mount *pmp; 1864 1865 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1866 1867 if (ap->a_vpp) 1868 *ap->a_vpp = ap->a_vp; 1869 if (ap->a_bnp) 1870 *ap->a_bnp = ap->a_bn; 1871 if (ap->a_runp) 1872 *ap->a_runp = pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX; 1873 1874 return 0; 1875 } 1876 1877 /* 1878 * moreXXX: yes, todo 1879 */ 1880 int 1881 puffs_lock(void *v) 1882 { 1883 struct vop_lock_args /* { 1884 struct vnode *a_vp; 1885 int a_flags; 1886 }*/ *ap = v; 1887 struct vnode *vp = ap->a_vp; 1888 1889 #if 0 1890 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1891 #endif 1892 1893 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 1894 } 1895 1896 int 1897 puffs_unlock(void *v) 1898 { 1899 struct vop_unlock_args /* { 1900 struct vnode *a_vp; 1901 int a_flags; 1902 } */ *ap = v; 1903 struct vnode *vp = ap->a_vp; 1904 1905 #if 0 1906 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1907 #endif 1908 1909 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 1910 } 1911 1912 int 1913 puffs_islocked(void *v) 1914 { 1915 struct vop_islocked_args *ap = v; 1916 int rv; 1917 1918 rv = lockstatus(&ap->a_vp->v_lock); 1919 return rv; 1920 } 1921 1922 int 1923 puffs_generic(void *v) 1924 { 1925 struct vop_generic_args *ap = v; 1926 1927 (void)ap; 1928 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 1929 1930 return EOPNOTSUPP; 1931 } 1932 1933 1934 /* 1935 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 1936 * FAF update information for the puffs node first. 1937 */ 1938 int 1939 puffs_spec_read(void *v) 1940 { 1941 struct vop_read_args /* { 1942 const struct vnodeop_desc *a_desc; 1943 struct vnode *a_vp; 1944 struct uio *a_uio; 1945 int a_ioflag; 1946 kauth_cred_t a_cred; 1947 } */ *ap = v; 1948 1949 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 1950 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 1951 } 1952 1953 int 1954 puffs_spec_write(void *v) 1955 { 1956 struct vop_write_args /* { 1957 const struct vnodeop_desc *a_desc; 1958 struct vnode *a_vp; 1959 struct uio *a_uio; 1960 int a_ioflag; 1961 kauth_cred_t a_cred; 1962 }*/ *ap = v; 1963 1964 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 1965 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 1966 } 1967 1968 int 1969 puffs_fifo_read(void *v) 1970 { 1971 struct vop_read_args /* { 1972 const struct vnodeop_desc *a_desc; 1973 struct vnode *a_vp; 1974 struct uio *a_uio; 1975 int a_ioflag; 1976 kauth_cred_t a_cred; 1977 } */ *ap = v; 1978 1979 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 1980 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 1981 } 1982 1983 int 1984 puffs_fifo_write(void *v) 1985 { 1986 struct vop_write_args /* { 1987 const struct vnodeop_desc *a_desc; 1988 struct vnode *a_vp; 1989 struct uio *a_uio; 1990 int a_ioflag; 1991 kauth_cred_t a_cred; 1992 }*/ *ap = v; 1993 1994 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 1995 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 1996 } 1997
Indexes created Tue Sep 30 17:09:57 GMT 2025