puffs_vnops.c revision 1.88
1 /* $NetBSD: puffs_vnops.c,v 1.88 2007/07/09 21:55:10 ad Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006, 2007 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 22 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.88 2007/07/09 21:55:10 ad Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/fstrans.h> 37 #include <sys/malloc.h> 38 #include <sys/mount.h> 39 #include <sys/namei.h> 40 #include <sys/vnode.h> 41 #include <sys/proc.h> 42 43 #include <uvm/uvm.h> 44 45 #include <fs/puffs/puffs_msgif.h> 46 #include <fs/puffs/puffs_sys.h> 47 48 #include <miscfs/fifofs/fifo.h> 49 #include <miscfs/genfs/genfs.h> 50 #include <miscfs/specfs/specdev.h> 51 52 int puffs_lookup(void *); 53 int puffs_create(void *); 54 int puffs_access(void *); 55 int puffs_mknod(void *); 56 int puffs_open(void *); 57 int puffs_close(void *); 58 int puffs_getattr(void *); 59 int puffs_setattr(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 int puffs_getpages(void *); 84 85 int puffs_spec_read(void *); 86 int puffs_spec_write(void *); 87 int puffs_fifo_read(void *); 88 int puffs_fifo_write(void *); 89 90 int puffs_checkop(void *); 91 92 93 /* VOP_LEASE() not included */ 94 95 int puffs_generic(void *); 96 97 #if 0 98 #define puffs_lock genfs_lock 99 #define puffs_unlock genfs_unlock 100 #define puffs_islocked genfs_islocked 101 #else 102 int puffs_lock(void *); 103 int puffs_unlock(void *); 104 int puffs_islocked(void *); 105 #endif 106 107 int (**puffs_vnodeop_p)(void *); 108 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 109 { &vop_default_desc, vn_default_error }, 110 { &vop_lookup_desc, puffs_lookup }, /* REAL lookup */ 111 { &vop_create_desc, puffs_checkop }, /* create */ 112 { &vop_mknod_desc, puffs_checkop }, /* mknod */ 113 { &vop_open_desc, puffs_open }, /* REAL open */ 114 { &vop_close_desc, puffs_checkop }, /* close */ 115 { &vop_access_desc, puffs_access }, /* REAL access */ 116 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 117 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 118 { &vop_read_desc, puffs_checkop }, /* read */ 119 { &vop_write_desc, puffs_checkop }, /* write */ 120 { &vop_fcntl_desc, puffs_checkop }, /* fcntl */ 121 { &vop_ioctl_desc, puffs_checkop }, /* ioctl */ 122 { &vop_fsync_desc, puffs_fsync }, /* REAL fsync */ 123 { &vop_seek_desc, puffs_checkop }, /* seek */ 124 { &vop_remove_desc, puffs_checkop }, /* remove */ 125 { &vop_link_desc, puffs_checkop }, /* link */ 126 { &vop_rename_desc, puffs_checkop }, /* rename */ 127 { &vop_mkdir_desc, puffs_checkop }, /* mkdir */ 128 { &vop_rmdir_desc, puffs_checkop }, /* rmdir */ 129 { &vop_symlink_desc, puffs_checkop }, /* symlink */ 130 { &vop_readdir_desc, puffs_checkop }, /* readdir */ 131 { &vop_readlink_desc, puffs_checkop }, /* readlink */ 132 { &vop_getpages_desc, puffs_checkop }, /* getpages */ 133 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 134 { &vop_pathconf_desc, puffs_checkop }, /* pathconf */ 135 { &vop_advlock_desc, puffs_checkop }, /* advlock */ 136 { &vop_strategy_desc, puffs_strategy }, /* REAL strategy */ 137 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 138 { &vop_abortop_desc, genfs_abortop }, /* REAL abortop */ 139 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 140 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 141 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 142 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 143 { &vop_bmap_desc, puffs_bmap }, /* REAL bmap */ 144 { &vop_print_desc, puffs_print }, /* REAL print */ 145 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 146 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 147 { &vop_mmap_desc, puffs_mmap }, /* REAL mmap */ 148 { &vop_poll_desc, puffs_poll }, /* REAL poll */ 149 150 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 151 { NULL, NULL } 152 }; 153 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 154 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 155 156 157 int (**puffs_specop_p)(void *); 158 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 159 { &vop_default_desc, vn_default_error }, 160 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 161 { &vop_create_desc, spec_create }, /* genfs_badop */ 162 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 163 { &vop_open_desc, spec_open }, /* spec_open */ 164 { &vop_close_desc, spec_close }, /* spec_close */ 165 { &vop_access_desc, puffs_checkop }, /* access */ 166 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 167 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 168 { &vop_read_desc, puffs_spec_read }, /* update, read */ 169 { &vop_write_desc, puffs_spec_write }, /* update, write */ 170 { &vop_lease_desc, spec_lease_check }, /* genfs_nullop */ 171 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 172 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 173 { &vop_poll_desc, spec_poll }, /* spec_poll */ 174 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 175 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 176 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 177 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 178 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 179 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 180 { &vop_link_desc, spec_link }, /* genfs_badop */ 181 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 182 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 183 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 184 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 185 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 186 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 187 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 188 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 189 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 190 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 191 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 192 { &vop_bmap_desc, spec_bmap }, /* dummy */ 193 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 194 { &vop_print_desc, puffs_print }, /* REAL print */ 195 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 196 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 197 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 198 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 199 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 200 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 201 #if 0 202 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 203 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 204 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 205 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 206 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 207 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 208 #endif 209 { NULL, NULL } 210 }; 211 const struct vnodeopv_desc puffs_specop_opv_desc = 212 { &puffs_specop_p, puffs_specop_entries }; 213 214 215 int (**puffs_fifoop_p)(void *); 216 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 217 { &vop_default_desc, vn_default_error }, 218 { &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */ 219 { &vop_create_desc, fifo_create }, /* genfs_badop */ 220 { &vop_mknod_desc, fifo_mknod }, /* genfs_badop */ 221 { &vop_open_desc, fifo_open }, /* open */ 222 { &vop_close_desc, fifo_close }, /* close */ 223 { &vop_access_desc, puffs_checkop }, /* access */ 224 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 225 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 226 { &vop_read_desc, puffs_fifo_read }, /* read, update */ 227 { &vop_write_desc, puffs_fifo_write }, /* write, update */ 228 { &vop_lease_desc, fifo_lease_check }, /* genfs_nullop */ 229 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 230 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 231 { &vop_poll_desc, fifo_poll }, /* poll */ 232 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 233 { &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */ 234 { &vop_mmap_desc, fifo_mmap }, /* genfs_badop */ 235 { &vop_fsync_desc, fifo_fsync }, /* genfs_nullop*/ 236 { &vop_seek_desc, fifo_seek }, /* genfs_badop */ 237 { &vop_remove_desc, fifo_remove }, /* genfs_badop */ 238 { &vop_link_desc, fifo_link }, /* genfs_badop */ 239 { &vop_rename_desc, fifo_rename }, /* genfs_badop */ 240 { &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */ 241 { &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */ 242 { &vop_symlink_desc, fifo_symlink }, /* genfs_badop */ 243 { &vop_readdir_desc, fifo_readdir }, /* genfs_badop */ 244 { &vop_readlink_desc, fifo_readlink }, /* genfs_badop */ 245 { &vop_abortop_desc, fifo_abortop }, /* genfs_badop */ 246 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 247 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 248 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 249 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 250 { &vop_bmap_desc, fifo_bmap }, /* dummy */ 251 { &vop_strategy_desc, fifo_strategy }, /* genfs_badop */ 252 { &vop_print_desc, puffs_print }, /* REAL print */ 253 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 254 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 255 { &vop_advlock_desc, fifo_advlock }, /* genfs_einval */ 256 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 257 { &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/ 258 #if 0 259 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 260 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 261 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 262 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 263 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 264 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 265 #endif 266 { NULL, NULL } 267 }; 268 const struct vnodeopv_desc puffs_fifoop_opv_desc = 269 { &puffs_fifoop_p, puffs_fifoop_entries }; 270 271 272 /* "real" vnode operations */ 273 int (**puffs_msgop_p)(void *); 274 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 275 { &vop_default_desc, vn_default_error }, 276 { &vop_create_desc, puffs_create }, /* create */ 277 { &vop_mknod_desc, puffs_mknod }, /* mknod */ 278 { &vop_open_desc, puffs_open }, /* open */ 279 { &vop_close_desc, puffs_close }, /* close */ 280 { &vop_access_desc, puffs_access }, /* access */ 281 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 282 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 283 { &vop_read_desc, puffs_read }, /* read */ 284 { &vop_write_desc, puffs_write }, /* write */ 285 { &vop_fcntl_desc, puffs_fcntl }, /* fcntl */ 286 { &vop_ioctl_desc, puffs_ioctl }, /* ioctl */ 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, puffs_getpages }, /* getpages */ 301 { NULL, NULL } 302 }; 303 const struct vnodeopv_desc puffs_msgop_opv_desc = 304 { &puffs_msgop_p, puffs_msgop_entries }; 305 306 307 #define ERROUT(err) \ 308 do { \ 309 error = err; \ 310 goto out; \ 311 } while (/*CONSTCOND*/0) 312 313 /* 314 * This is a generic vnode operation handler. It checks if the necessary 315 * operations for the called vnode operation are implemented by userspace 316 * and either returns a dummy return value or proceeds to call the real 317 * vnode operation from puffs_msgop_v. 318 * 319 * XXX: this should described elsewhere and autogenerated, the complexity 320 * of the vnode operations vectors and their interrelationships is also 321 * getting a bit out of hand. Another problem is that we need this same 322 * information in the fs server code, so keeping the two in sync manually 323 * is not a viable (long term) plan. 324 */ 325 326 /* not supported, handle locking protocol */ 327 #define CHECKOP_NOTSUPP(op) \ 328 case VOP_##op##_DESCOFFSET: \ 329 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 330 return genfs_eopnotsupp(v); \ 331 break 332 333 /* always succeed, no locking */ 334 #define CHECKOP_SUCCESS(op) \ 335 case VOP_##op##_DESCOFFSET: \ 336 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 337 return 0; \ 338 break 339 340 int 341 puffs_checkop(void *v) 342 { 343 struct vop_generic_args /* { 344 struct vnodeop_desc *a_desc; 345 spooky mystery contents; 346 } */ *ap = v; 347 struct vnodeop_desc *desc = ap->a_desc; 348 struct puffs_mount *pmp; 349 struct vnode *vp; 350 int offset, rv; 351 352 offset = ap->a_desc->vdesc_vp_offsets[0]; 353 #ifdef DIAGNOSTIC 354 if (offset == VDESC_NO_OFFSET) 355 panic("puffs_checkop: no vnode, why did you call me?"); 356 #endif 357 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 358 pmp = MPTOPUFFSMP(vp->v_mount); 359 360 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 361 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 362 363 if (!ALLOPS(pmp)) { 364 switch (desc->vdesc_offset) { 365 CHECKOP_NOTSUPP(CREATE); 366 CHECKOP_NOTSUPP(MKNOD); 367 CHECKOP_NOTSUPP(GETATTR); 368 CHECKOP_NOTSUPP(SETATTR); 369 CHECKOP_NOTSUPP(READ); 370 CHECKOP_NOTSUPP(WRITE); 371 CHECKOP_NOTSUPP(FCNTL); 372 CHECKOP_NOTSUPP(IOCTL); 373 CHECKOP_NOTSUPP(REMOVE); 374 CHECKOP_NOTSUPP(LINK); 375 CHECKOP_NOTSUPP(RENAME); 376 CHECKOP_NOTSUPP(MKDIR); 377 CHECKOP_NOTSUPP(RMDIR); 378 CHECKOP_NOTSUPP(SYMLINK); 379 CHECKOP_NOTSUPP(READDIR); 380 CHECKOP_NOTSUPP(READLINK); 381 CHECKOP_NOTSUPP(PRINT); 382 CHECKOP_NOTSUPP(PATHCONF); 383 CHECKOP_NOTSUPP(ADVLOCK); 384 385 CHECKOP_SUCCESS(ACCESS); 386 CHECKOP_SUCCESS(CLOSE); 387 CHECKOP_SUCCESS(SEEK); 388 389 case VOP_GETPAGES_DESCOFFSET: 390 if (!EXISTSOP(pmp, READ)) 391 return genfs_eopnotsupp(v); 392 break; 393 394 default: 395 panic("puffs_checkop: unhandled vnop %d", 396 desc->vdesc_offset); 397 } 398 } 399 400 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 401 402 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 403 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 404 405 return rv; 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_USE_NAMECACHE(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, &lookup_arg.pvnr_cn_cred, 460 &lookup_arg.pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 461 462 if (cnp->cn_flags & ISDOTDOT) 463 VOP_UNLOCK(dvp, 0); 464 465 error = puffs_vntouser(pmp, PUFFS_VN_LOOKUP, 466 &lookup_arg, sizeof(lookup_arg), 0, dvp, NULL); 467 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 468 469 /* 470 * In case of error, there is no new vnode to play with, so be 471 * happy with the NULL value given to vpp in the beginning. 472 * Also, check if this really was an error or the target was not 473 * present. Either treat it as a non-error for CREATE/RENAME or 474 * enter the component into the negative name cache (if desired). 475 */ 476 if (error) { 477 if (error == ENOENT) { 478 if ((cnp->cn_flags & ISLASTCN) 479 && (cnp->cn_nameiop == CREATE 480 || cnp->cn_nameiop == RENAME)) { 481 cnp->cn_flags |= SAVENAME; 482 error = EJUSTRETURN; 483 } else { 484 if ((cnp->cn_flags & MAKEENTRY) 485 && PUFFS_USE_NAMECACHE(pmp)) 486 cache_enter(dvp, NULL, cnp); 487 } 488 } else if (error < 0) { 489 error = EINVAL; 490 } 491 goto out; 492 } 493 494 /* 495 * Check that we don't get our parent node back, that would cause 496 * a pretty obvious deadlock. 497 */ 498 dpn = dvp->v_data; 499 if (lookup_arg.pvnr_newnode == dpn->pn_cookie) { 500 error = EINVAL; 501 goto out; 502 } 503 504 /* XXX: race here */ 505 /* XXX2: this check for node existence twice */ 506 error = puffs_pnode2vnode(pmp, lookup_arg.pvnr_newnode, 1, &vp); 507 if (error) { 508 error = puffs_getvnode(dvp->v_mount, 509 lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype, 510 lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp); 511 if (error) { 512 goto out; 513 } 514 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 515 } 516 *ap->a_vpp = vp; 517 518 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_USE_NAMECACHE(pmp)) 519 cache_enter(dvp, vp, cnp); 520 521 /* XXX */ 522 if ((lookup_arg.pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 523 cnp->cn_flags &= ~REQUIREDIR; 524 if (lookup_arg.pvnr_cn.pkcn_consume) 525 cnp->cn_consume = MIN(lookup_arg.pvnr_cn.pkcn_consume, 526 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 527 528 out: 529 if (cnp->cn_flags & ISDOTDOT) 530 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 531 532 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 533 return error; 534 } 535 536 int 537 puffs_create(void *v) 538 { 539 struct vop_create_args /* { 540 const struct vnodeop_desc *a_desc; 541 struct vnode *a_dvp; 542 struct vnode **a_vpp; 543 struct componentname *a_cnp; 544 struct vattr *a_vap; 545 } */ *ap = v; 546 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 547 int error; 548 549 PUFFS_VNREQ(create); 550 551 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 552 ap->a_dvp, ap->a_cnp->cn_nameptr)); 553 554 puffs_makecn(&create_arg.pvnr_cn, &create_arg.pvnr_cn_cred, 555 &create_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 556 create_arg.pvnr_va = *ap->a_vap; 557 558 error = puffs_vntouser(pmp, PUFFS_VN_CREATE, 559 &create_arg, sizeof(create_arg), 0, ap->a_dvp, NULL); 560 if (error) 561 goto out; 562 563 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 564 create_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 0); 565 /* XXX: in case of error, need to uncommit userspace transaction */ 566 567 out: 568 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 569 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 570 vput(ap->a_dvp); 571 572 DPRINTF(("puffs_create: return %d\n", error)); 573 return error; 574 } 575 576 int 577 puffs_mknod(void *v) 578 { 579 struct vop_mknod_args /* { 580 const struct vnodeop_desc *a_desc; 581 struct vnode *a_dvp; 582 struct vnode **a_vpp; 583 struct componentname *a_cnp; 584 struct vattr *a_vap; 585 } */ *ap = v; 586 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 587 int error; 588 589 PUFFS_VNREQ(mknod); 590 591 puffs_makecn(&mknod_arg.pvnr_cn, &mknod_arg.pvnr_cn_cred, 592 &mknod_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 593 mknod_arg.pvnr_va = *ap->a_vap; 594 595 error = puffs_vntouser(pmp, PUFFS_VN_MKNOD, 596 &mknod_arg, sizeof(mknod_arg), 0, ap->a_dvp, NULL); 597 if (error) 598 goto out; 599 600 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 601 mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 602 ap->a_vap->va_rdev); 603 604 out: 605 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 606 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 607 vput(ap->a_dvp); 608 return error; 609 } 610 611 int 612 puffs_open(void *v) 613 { 614 struct vop_open_args /* { 615 const struct vnodeop_desc *a_desc; 616 struct vnode *a_vp; 617 int a_mode; 618 kauth_cred_t a_cred; 619 struct lwp *a_l; 620 } */ *ap = v; 621 struct vnode *vp = ap->a_vp; 622 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 623 int mode = ap->a_mode; 624 int error; 625 626 PUFFS_VNREQ(open); 627 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 628 629 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 630 ERROUT(EROFS); 631 632 if (!EXISTSOP(pmp, OPEN)) 633 ERROUT(0); 634 635 open_arg.pvnr_mode = mode; 636 puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred); 637 puffs_cidcvt(&open_arg.pvnr_cid, ap->a_l); 638 639 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_OPEN, 640 &open_arg, sizeof(open_arg), 0, vp, NULL); 641 642 out: 643 DPRINTF(("puffs_open: returning %d\n", error)); 644 return error; 645 } 646 647 int 648 puffs_close(void *v) 649 { 650 struct vop_close_args /* { 651 const struct vnodeop_desc *a_desc; 652 struct vnode *a_vp; 653 int a_fflag; 654 kauth_cred_t a_cred; 655 struct lwp *a_l; 656 } */ *ap = v; 657 struct puffs_vnreq_close *close_argp; 658 659 close_argp = malloc(sizeof(struct puffs_vnreq_close), 660 M_PUFFS, M_WAITOK | M_ZERO); 661 close_argp->pvnr_fflag = ap->a_fflag; 662 puffs_credcvt(&close_argp->pvnr_cred, ap->a_cred); 663 puffs_cidcvt(&close_argp->pvnr_cid, ap->a_l); 664 665 puffs_vntouser_faf(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 666 close_argp, sizeof(struct puffs_vnreq_close), ap->a_vp); 667 668 return 0; 669 } 670 671 int 672 puffs_access(void *v) 673 { 674 struct vop_access_args /* { 675 const struct vnodeop_desc *a_desc; 676 struct vnode *a_vp; 677 int a_mode; 678 kauth_cred_t a_cred; 679 struct lwp *a_l; 680 } */ *ap = v; 681 struct vnode *vp = ap->a_vp; 682 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 683 int mode = ap->a_mode; 684 685 PUFFS_VNREQ(access); 686 687 if (vp->v_type == VREG && mode & VWRITE && !EXISTSOP(pmp, WRITE)) 688 return EROFS; 689 690 if (!EXISTSOP(pmp, ACCESS)) 691 return 0; 692 693 access_arg.pvnr_mode = ap->a_mode; 694 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 695 puffs_cidcvt(&access_arg.pvnr_cid, ap->a_l); 696 697 return puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_ACCESS, 698 &access_arg, sizeof(access_arg), 0, vp, NULL); 699 } 700 701 int 702 puffs_getattr(void *v) 703 { 704 struct vop_getattr_args /* { 705 const struct vnodeop_desc *a_desc; 706 struct vnode *a_vp; 707 struct vattr *a_vap; 708 kauth_cred_t a_cred; 709 struct lwp *a_l; 710 } */ *ap = v; 711 struct mount *mp; 712 struct vnode *vp; 713 struct vattr *vap, *rvap; 714 struct puffs_node *pn; 715 int error; 716 717 PUFFS_VNREQ(getattr); 718 719 vp = ap->a_vp; 720 mp = vp->v_mount; 721 vap = ap->a_vap; 722 723 vattr_null(&getattr_arg.pvnr_va); 724 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 725 puffs_cidcvt(&getattr_arg.pvnr_cid, ap->a_l); 726 727 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_GETATTR, 728 &getattr_arg, sizeof(getattr_arg), 0, vp, NULL); 729 if (error) 730 return error; 731 732 rvap = &getattr_arg.pvnr_va; 733 /* 734 * Don't listen to the file server regarding special device 735 * size info, the file server doesn't know anything about them. 736 */ 737 if (vp->v_type == VBLK || vp->v_type == VCHR) 738 rvap->va_size = vp->v_size; 739 740 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 741 if (vp->v_type == VBLK) 742 rvap->va_blocksize = BLKDEV_IOSIZE; 743 else if (vp->v_type == VCHR) 744 rvap->va_blocksize = MAXBSIZE; 745 746 (void) memcpy(vap, rvap, sizeof(struct vattr)); 747 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 748 749 pn = VPTOPP(vp); 750 if (pn->pn_stat & PNODE_METACACHE_ATIME) 751 vap->va_atime = pn->pn_mc_atime; 752 if (pn->pn_stat & PNODE_METACACHE_CTIME) 753 vap->va_ctime = pn->pn_mc_ctime; 754 if (pn->pn_stat & PNODE_METACACHE_MTIME) 755 vap->va_mtime = pn->pn_mc_mtime; 756 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 757 vap->va_size = pn->pn_mc_size; 758 } else { 759 if (rvap->va_size != VNOVAL 760 && vp->v_type != VBLK && vp->v_type != VCHR) 761 uvm_vnp_setsize(vp, rvap->va_size); 762 } 763 764 return 0; 765 } 766 767 int 768 puffs_setattr(void *v) 769 { 770 struct vop_getattr_args /* { 771 const struct vnodeop_desc *a_desc; 772 struct vnode *a_vp; 773 struct vattr *a_vap; 774 kauth_cred_t a_cred; 775 struct lwp *a_l; 776 } */ *ap = v; 777 int error; 778 struct vattr *vap = ap->a_vap; 779 struct puffs_node *pn = ap->a_vp->v_data; 780 781 PUFFS_VNREQ(setattr); 782 783 /* 784 * Flush metacache first. If we are called with some explicit 785 * parameters, treat them as information overriding metacache 786 * information. 787 */ 788 if (pn->pn_stat & PNODE_METACACHE_MASK) { 789 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 790 && vap->va_atime.tv_sec == VNOVAL) 791 vap->va_atime = pn->pn_mc_atime; 792 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 793 && vap->va_ctime.tv_sec == VNOVAL) 794 vap->va_ctime = pn->pn_mc_ctime; 795 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 796 && vap->va_mtime.tv_sec == VNOVAL) 797 vap->va_mtime = pn->pn_mc_mtime; 798 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 799 && vap->va_size == VNOVAL) 800 vap->va_size = pn->pn_mc_size; 801 802 pn->pn_stat &= ~PNODE_METACACHE_MASK; 803 } 804 805 (void)memcpy(&setattr_arg.pvnr_va, vap, sizeof(struct vattr)); 806 puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred); 807 puffs_cidcvt(&setattr_arg.pvnr_cid, ap->a_l); 808 809 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR, 810 &setattr_arg, sizeof(setattr_arg), 0, ap->a_vp, NULL); 811 if (error) 812 return error; 813 814 if (vap->va_size != VNOVAL) 815 uvm_vnp_setsize(ap->a_vp, vap->va_size); 816 817 return 0; 818 } 819 820 int 821 puffs_inactive(void *v) 822 { 823 struct vop_inactive_args /* { 824 const struct vnodeop_desc *a_desc; 825 struct vnode *a_vp; 826 struct lwp *a_l; 827 } */ *ap = v; 828 struct puffs_mount *pmp; 829 struct puffs_node *pnode; 830 int rv, call; 831 832 PUFFS_VNREQ(inactive); 833 834 /* 835 * XXX: think about this after we really start unlocking 836 * when going to userspace 837 */ 838 pnode = ap->a_vp->v_data; 839 840 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 841 842 puffs_cidcvt(&inactive_arg.pvnr_cid, ap->a_l); 843 844 if (EXISTSOP(pmp, INACTIVE)) 845 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 846 if ((pnode->pn_stat & PNODE_DOINACT) || ALLOPS(pmp)) 847 call = 1; 848 else 849 call = 0; 850 else 851 call = 1; 852 else 853 call = 0; 854 855 if (call) 856 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 857 &inactive_arg, sizeof(inactive_arg), 0, ap->a_vp, NULL); 858 else 859 rv = 1; /* see below */ 860 pnode->pn_stat &= ~PNODE_DOINACT; 861 862 VOP_UNLOCK(ap->a_vp, 0); 863 864 /* 865 * file server thinks it's gone? then don't be afraid care, 866 * node's life was already all it would ever be 867 */ 868 if (pnode->pn_stat & PNODE_NOREFS) { 869 pnode->pn_stat |= PNODE_DYING; 870 vrecycle(ap->a_vp, NULL, ap->a_l); 871 } 872 873 return 0; 874 } 875 876 /* 877 * always FAF, we don't really care if the server wants to fail to 878 * reclaim the node or not 879 */ 880 int 881 puffs_reclaim(void *v) 882 { 883 struct vop_reclaim_args /* { 884 const struct vnodeop_desc *a_desc; 885 struct vnode *a_vp; 886 struct lwp *a_l; 887 } */ *ap = v; 888 struct puffs_mount *pmp; 889 struct puffs_vnreq_reclaim *reclaim_argp; 890 891 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 892 893 /* 894 * first things first: check if someone is trying to reclaim the 895 * root vnode. do not allow that to travel to userspace. 896 * Note that we don't need to take the lock similarly to 897 * puffs_root(), since there is only one of us. 898 */ 899 if (ap->a_vp->v_flag & VROOT) { 900 mutex_enter(&pmp->pmp_lock); 901 KASSERT(pmp->pmp_root != NULL); 902 pmp->pmp_root = NULL; 903 mutex_exit(&pmp->pmp_lock); 904 goto out; 905 } 906 907 if (!EXISTSOP(pmp, RECLAIM)) 908 goto out; 909 910 reclaim_argp = malloc(sizeof(struct puffs_vnreq_reclaim), 911 M_PUFFS, M_WAITOK | M_ZERO); 912 puffs_cidcvt(&reclaim_argp->pvnr_cid, ap->a_l); 913 914 puffs_vntouser_faf(pmp, PUFFS_VN_RECLAIM, 915 reclaim_argp, sizeof(struct puffs_vnreq_reclaim), ap->a_vp); 916 917 out: 918 if (PUFFS_USE_NAMECACHE(pmp)) 919 cache_purge(ap->a_vp); 920 puffs_putvnode(ap->a_vp); 921 922 return 0; 923 } 924 925 #define CSIZE sizeof(**ap->a_cookies) 926 int 927 puffs_readdir(void *v) 928 { 929 struct vop_readdir_args /* { 930 const struct vnodeop_desc *a_desc; 931 struct vnode *a_vp; 932 struct uio *a_uio; 933 kauth_cred_t a_cred; 934 int *a_eofflag; 935 off_t **a_cookies; 936 int *a_ncookies; 937 } */ *ap = v; 938 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 939 struct puffs_vnreq_readdir *readdir_argp; 940 size_t argsize, tomove, cookiemem, cookiesmax; 941 struct uio *uio = ap->a_uio; 942 size_t howmuch; 943 int error; 944 945 if (ap->a_cookies) { 946 KASSERT(ap->a_ncookies != NULL); 947 if (pmp->pmp_args.pa_fhsize == 0) 948 return EOPNOTSUPP; 949 cookiesmax = uio->uio_resid/_DIRENT_MINSIZE((struct dirent *)0); 950 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 951 } else { 952 cookiesmax = 0; 953 cookiemem = 0; 954 } 955 956 argsize = sizeof(struct puffs_vnreq_readdir); 957 tomove = uio->uio_resid + cookiemem; 958 readdir_argp = malloc(argsize + tomove, M_PUFFS, M_ZERO | M_WAITOK); 959 960 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 961 readdir_argp->pvnr_offset = uio->uio_offset; 962 readdir_argp->pvnr_resid = uio->uio_resid; 963 readdir_argp->pvnr_ncookies = cookiesmax; 964 readdir_argp->pvnr_eofflag = 0; 965 readdir_argp->pvnr_dentoff = cookiemem; 966 967 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 968 PUFFS_VN_READDIR, readdir_argp, argsize, tomove, 969 ap->a_vp, NULL); 970 if (error) 971 goto out; 972 973 /* userspace is cheating? */ 974 if (readdir_argp->pvnr_resid > uio->uio_resid 975 || readdir_argp->pvnr_ncookies > cookiesmax) 976 ERROUT(EINVAL); 977 978 /* check eof */ 979 if (readdir_argp->pvnr_eofflag) 980 *ap->a_eofflag = 1; 981 982 /* bouncy-wouncy with the directory data */ 983 howmuch = uio->uio_resid - readdir_argp->pvnr_resid; 984 985 /* force eof if no data was returned (getcwd() needs this) */ 986 if (howmuch == 0) { 987 *ap->a_eofflag = 1; 988 goto out; 989 } 990 991 error = uiomove(readdir_argp->pvnr_data + cookiemem, howmuch, uio); 992 if (error) 993 goto out; 994 995 /* provide cookies to caller if so desired */ 996 if (ap->a_cookies) { 997 *ap->a_cookies = malloc(readdir_argp->pvnr_ncookies*CSIZE, 998 M_TEMP, M_WAITOK); 999 *ap->a_ncookies = readdir_argp->pvnr_ncookies; 1000 memcpy(*ap->a_cookies, readdir_argp->pvnr_data, 1001 *ap->a_ncookies*CSIZE); 1002 } 1003 1004 /* next readdir starts here */ 1005 uio->uio_offset = readdir_argp->pvnr_offset; 1006 1007 out: 1008 free(readdir_argp, M_PUFFS); 1009 return error; 1010 } 1011 #undef CSIZE 1012 1013 /* 1014 * poll works by consuming the bitmask in pn_revents. If there are 1015 * events available, poll returns immediately. If not, it issues a 1016 * poll to userspace, selrecords itself and returns with no available 1017 * events. When the file server returns, it executes puffs_parkdone_poll(), 1018 * where available events are added to the bitmask. selnotify() is 1019 * then also executed by that function causing us to enter here again 1020 * and hopefully find the missing bits (unless someone got them first, 1021 * in which case it starts all over again). 1022 */ 1023 int 1024 puffs_poll(void *v) 1025 { 1026 struct vop_poll_args /* { 1027 const struct vnodeop_desc *a_desc; 1028 struct vnode *a_vp; 1029 int a_events; 1030 struct lwp *a_l; 1031 }*/ *ap = v; 1032 struct vnode *vp = ap->a_vp; 1033 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1034 struct puffs_vnreq_poll *poll_argp; 1035 struct puffs_node *pn = vp->v_data; 1036 int events; 1037 1038 if (EXISTSOP(pmp, POLL)) { 1039 mutex_enter(&pn->pn_mtx); 1040 events = pn->pn_revents & ap->a_events; 1041 if (events & ap->a_events) { 1042 pn->pn_revents &= ~ap->a_events; 1043 mutex_exit(&pn->pn_mtx); 1044 1045 return events; 1046 } else { 1047 puffs_referencenode(pn); 1048 mutex_exit(&pn->pn_mtx); 1049 1050 /* freed in puffs_parkdone_poll */ 1051 poll_argp = malloc(sizeof(struct puffs_vnreq_poll), 1052 M_PUFFS, M_ZERO | M_WAITOK); 1053 1054 poll_argp->pvnr_events = ap->a_events; 1055 puffs_cidcvt(&poll_argp->pvnr_cid, ap->a_l); 1056 1057 selrecord(ap->a_l, &pn->pn_sel); 1058 puffs_vntouser_call(pmp, PUFFS_VN_POLL, 1059 poll_argp, sizeof(struct puffs_vnreq_poll), 0, 1060 puffs_parkdone_poll, pn, 1061 vp, NULL); 1062 1063 return 0; 1064 } 1065 } else { 1066 return genfs_poll(v); 1067 } 1068 } 1069 1070 int 1071 puffs_fsync(void *v) 1072 { 1073 struct vop_fsync_args /* { 1074 const struct vnodeop_desc *a_desc; 1075 struct vnode *a_vp; 1076 kauth_cred_t a_cred; 1077 int a_flags; 1078 off_t a_offlo; 1079 off_t a_offhi; 1080 struct lwp *a_l; 1081 } */ *ap = v; 1082 struct vattr va; 1083 struct puffs_mount *pmp; 1084 struct puffs_vnreq_fsync *fsync_argp; 1085 struct vnode *vp; 1086 struct puffs_node *pn; 1087 int pflags, error, dofaf; 1088 1089 PUFFS_VNREQ(fsync); 1090 1091 vp = ap->a_vp; 1092 pn = VPTOPP(vp); 1093 pmp = MPTOPUFFSMP(vp->v_mount); 1094 1095 /* flush out information from our metacache, see vop_setattr */ 1096 if (pn->pn_stat & PNODE_METACACHE_MASK 1097 && (pn->pn_stat & PNODE_DYING) == 0) { 1098 vattr_null(&va); 1099 error = VOP_SETATTR(vp, &va, FSCRED, NULL); 1100 if (error) 1101 return error; 1102 } 1103 1104 /* 1105 * flush pages to avoid being overly dirty 1106 */ 1107 pflags = PGO_CLEANIT; 1108 if (ap->a_flags & FSYNC_WAIT) 1109 pflags |= PGO_SYNCIO; 1110 simple_lock(&vp->v_interlock); 1111 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1112 round_page(ap->a_offhi), pflags); 1113 if (error) 1114 return error; 1115 1116 /* 1117 * HELLO! We exit already here if the user server does not 1118 * support fsync OR if we should call fsync for a node which 1119 * has references neither in the kernel or the fs server. 1120 * Otherwise we continue to issue fsync() forward. 1121 */ 1122 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1123 return 0; 1124 1125 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1126 /* 1127 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1128 * only FAFs for those. Otherwise there's a danger of deadlock, 1129 * since the execution context here might be the user server 1130 * doing some operation on another fs, which in turn caused a 1131 * vnode to be reclaimed from the freelist for this fs. 1132 */ 1133 if (dofaf == 0) { 1134 simple_lock(&vp->v_interlock); 1135 if (vp->v_flag & VXLOCK) 1136 dofaf = 1; 1137 simple_unlock(&vp->v_interlock); 1138 } 1139 1140 if (dofaf == 0) { 1141 fsync_argp = &fsync_arg; 1142 } else { 1143 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 1144 M_PUFFS, M_ZERO | M_NOWAIT); 1145 if (fsync_argp == NULL) 1146 return ENOMEM; 1147 } 1148 1149 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 1150 fsync_argp->pvnr_flags = ap->a_flags; 1151 fsync_argp->pvnr_offlo = ap->a_offlo; 1152 fsync_argp->pvnr_offhi = ap->a_offhi; 1153 puffs_cidcvt(&fsync_argp->pvnr_cid, ap->a_l); 1154 1155 /* 1156 * XXX: see comment at puffs_getattr about locking 1157 * 1158 * If we are not required to wait, do a FAF operation. 1159 * Otherwise block here. 1160 */ 1161 if (dofaf == 0) { 1162 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1163 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 0, 1164 vp, NULL); 1165 } else { 1166 /* FAF is always "succesful" */ 1167 error = 0; 1168 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1169 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), vp); 1170 } 1171 1172 return error; 1173 } 1174 1175 int 1176 puffs_seek(void *v) 1177 { 1178 struct vop_seek_args /* { 1179 const struct vnodeop_desc *a_desc; 1180 struct vnode *a_vp; 1181 off_t a_oldoff; 1182 off_t a_newoff; 1183 kauth_cred_t a_cred; 1184 } */ *ap = v; 1185 1186 PUFFS_VNREQ(seek); 1187 1188 seek_arg.pvnr_oldoff = ap->a_oldoff; 1189 seek_arg.pvnr_newoff = ap->a_newoff; 1190 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1191 1192 /* 1193 * XXX: seems like seek is called with an unlocked vp, but 1194 * it can't hurt to play safe 1195 */ 1196 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1197 &seek_arg, sizeof(seek_arg), 0, ap->a_vp, NULL); 1198 } 1199 1200 int 1201 puffs_remove(void *v) 1202 { 1203 struct vop_remove_args /* { 1204 const struct vnodeop_desc *a_desc; 1205 struct vnode *a_dvp; 1206 struct vnode *a_vp; 1207 struct componentname *a_cnp; 1208 } */ *ap = v; 1209 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1210 int error; 1211 1212 PUFFS_VNREQ(remove); 1213 1214 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1215 puffs_makecn(&remove_arg.pvnr_cn, &remove_arg.pvnr_cn_cred, 1216 &remove_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1217 1218 error = puffs_vntouser(pmp, PUFFS_VN_REMOVE, 1219 &remove_arg, sizeof(remove_arg), 0, ap->a_dvp, ap->a_vp); 1220 1221 vput(ap->a_vp); 1222 if (ap->a_dvp == ap->a_vp) 1223 vrele(ap->a_dvp); 1224 else 1225 vput(ap->a_dvp); 1226 1227 return error; 1228 } 1229 1230 int 1231 puffs_mkdir(void *v) 1232 { 1233 struct vop_mkdir_args /* { 1234 const struct vnodeop_desc *a_desc; 1235 struct vnode *a_dvp; 1236 struct vnode **a_vpp; 1237 struct componentname *a_cnp; 1238 struct vattr *a_vap; 1239 } */ *ap = v; 1240 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1241 int error; 1242 1243 PUFFS_VNREQ(mkdir); 1244 1245 puffs_makecn(&mkdir_arg.pvnr_cn, &mkdir_arg.pvnr_cn_cred, 1246 &mkdir_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1247 mkdir_arg.pvnr_va = *ap->a_vap; 1248 1249 error = puffs_vntouser(pmp, PUFFS_VN_MKDIR, 1250 &mkdir_arg, sizeof(mkdir_arg), 0, ap->a_dvp, NULL); 1251 if (error) 1252 goto out; 1253 1254 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1255 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1256 1257 out: 1258 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1259 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1260 vput(ap->a_dvp); 1261 return error; 1262 } 1263 1264 int 1265 puffs_rmdir(void *v) 1266 { 1267 struct vop_rmdir_args /* { 1268 const struct vnodeop_desc *a_desc; 1269 struct vnode *a_dvp; 1270 struct vnode *a_vp; 1271 struct componentname *a_cnp; 1272 } */ *ap = v; 1273 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1274 int error; 1275 1276 PUFFS_VNREQ(rmdir); 1277 1278 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1279 puffs_makecn(&rmdir_arg.pvnr_cn, &rmdir_arg.pvnr_cn_cred, 1280 &rmdir_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1281 1282 error = puffs_vntouser(pmp, PUFFS_VN_RMDIR, 1283 &rmdir_arg, sizeof(rmdir_arg), 0, ap->a_dvp, ap->a_vp); 1284 1285 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1286 1287 vput(ap->a_dvp); 1288 vput(ap->a_vp); 1289 1290 return error; 1291 } 1292 1293 int 1294 puffs_link(void *v) 1295 { 1296 struct vop_link_args /* { 1297 const struct vnodeop_desc *a_desc; 1298 struct vnode *a_dvp; 1299 struct vnode *a_vp; 1300 struct componentname *a_cnp; 1301 }*/ *ap = v; 1302 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1303 int error; 1304 1305 PUFFS_VNREQ(link); 1306 1307 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1308 puffs_makecn(&link_arg.pvnr_cn, &link_arg.pvnr_cn_cred, 1309 &link_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1310 1311 error = puffs_vntouser(pmp, PUFFS_VN_LINK, 1312 &link_arg, sizeof(link_arg), 0, ap->a_dvp, ap->a_vp); 1313 1314 /* 1315 * XXX: stay in touch with the cache. I don't like this, but 1316 * don't have a better solution either. See also puffs_rename(). 1317 */ 1318 if (error == 0) 1319 puffs_updatenode(ap->a_vp, PUFFS_UPDATECTIME); 1320 1321 vput(ap->a_dvp); 1322 1323 return error; 1324 } 1325 1326 int 1327 puffs_symlink(void *v) 1328 { 1329 struct vop_symlink_args /* { 1330 const struct vnodeop_desc *a_desc; 1331 struct vnode *a_dvp; 1332 struct vnode **a_vpp; 1333 struct componentname *a_cnp; 1334 struct vattr *a_vap; 1335 char *a_target; 1336 }*/ *ap = v; 1337 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1338 struct puffs_vnreq_symlink *symlink_argp; 1339 int error; 1340 1341 *ap->a_vpp = NULL; 1342 1343 symlink_argp = malloc(sizeof(struct puffs_vnreq_symlink), 1344 M_PUFFS, M_ZERO | M_WAITOK); 1345 puffs_makecn(&symlink_argp->pvnr_cn, &symlink_argp->pvnr_cn_cred, 1346 &symlink_argp->pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1347 symlink_argp->pvnr_va = *ap->a_vap; 1348 (void)strlcpy(symlink_argp->pvnr_link, ap->a_target, 1349 sizeof(symlink_argp->pvnr_link)); 1350 1351 error = puffs_vntouser(pmp, PUFFS_VN_SYMLINK, 1352 symlink_argp, sizeof(*symlink_argp), 0, ap->a_dvp, NULL); 1353 if (error) 1354 goto out; 1355 1356 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1357 symlink_argp->pvnr_newnode, ap->a_cnp, VLNK, 0); 1358 1359 out: 1360 free(symlink_argp, M_PUFFS); 1361 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1362 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1363 vput(ap->a_dvp); 1364 1365 return error; 1366 } 1367 1368 int 1369 puffs_readlink(void *v) 1370 { 1371 struct vop_readlink_args /* { 1372 const struct vnodeop_desc *a_desc; 1373 struct vnode *a_vp; 1374 struct uio *a_uio; 1375 kauth_cred_t a_cred; 1376 } */ *ap = v; 1377 size_t linklen; 1378 int error; 1379 1380 PUFFS_VNREQ(readlink); 1381 1382 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1383 linklen = sizeof(readlink_arg.pvnr_link); 1384 readlink_arg.pvnr_linklen = linklen; 1385 1386 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1387 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 0, 1388 ap->a_vp, NULL); 1389 if (error) 1390 return error; 1391 1392 /* bad bad user file server */ 1393 if (readlink_arg.pvnr_linklen > linklen) 1394 return EINVAL; 1395 1396 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1397 ap->a_uio); 1398 } 1399 1400 int 1401 puffs_rename(void *v) 1402 { 1403 struct vop_rename_args /* { 1404 const struct vnodeop_desc *a_desc; 1405 struct vnode *a_fdvp; 1406 struct vnode *a_fvp; 1407 struct componentname *a_fcnp; 1408 struct vnode *a_tdvp; 1409 struct vnode *a_tvp; 1410 struct componentname *a_tcnp; 1411 }*/ *ap = v; 1412 struct puffs_vnreq_rename *rename_argp = NULL; 1413 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_fdvp->v_mount); 1414 int error; 1415 1416 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) 1417 ERROUT(EXDEV); 1418 1419 rename_argp = malloc(sizeof(struct puffs_vnreq_rename), 1420 M_PUFFS, M_WAITOK | M_ZERO); 1421 1422 rename_argp->pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1423 rename_argp->pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1424 if (ap->a_tvp) 1425 rename_argp->pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1426 else 1427 rename_argp->pvnr_cookie_targ = NULL; 1428 puffs_makecn(&rename_argp->pvnr_cn_src, 1429 &rename_argp->pvnr_cn_src_cred, &rename_argp->pvnr_cn_src_cid, 1430 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1431 puffs_makecn(&rename_argp->pvnr_cn_targ, 1432 &rename_argp->pvnr_cn_targ_cred, &rename_argp->pvnr_cn_targ_cid, 1433 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1434 1435 error = puffs_vntouser(pmp, PUFFS_VN_RENAME, 1436 rename_argp, sizeof(*rename_argp), 0, ap->a_fdvp, NULL); /* XXX */ 1437 1438 /* 1439 * XXX: stay in touch with the cache. I don't like this, but 1440 * don't have a better solution either. See also puffs_link(). 1441 */ 1442 if (error == 0) 1443 puffs_updatenode(ap->a_fvp, PUFFS_UPDATECTIME); 1444 1445 out: 1446 if (rename_argp) 1447 free(rename_argp, M_PUFFS); 1448 if (ap->a_tvp != NULL) 1449 vput(ap->a_tvp); 1450 if (ap->a_tdvp == ap->a_tvp) 1451 vrele(ap->a_tdvp); 1452 else 1453 vput(ap->a_tdvp); 1454 1455 vrele(ap->a_fdvp); 1456 vrele(ap->a_fvp); 1457 1458 return error; 1459 } 1460 1461 #define RWARGS(cont, iofl, move, offset, creds) \ 1462 (cont)->pvnr_ioflag = (iofl); \ 1463 (cont)->pvnr_resid = (move); \ 1464 (cont)->pvnr_offset = (offset); \ 1465 puffs_credcvt(&(cont)->pvnr_cred, creds) 1466 1467 int 1468 puffs_read(void *v) 1469 { 1470 struct vop_read_args /* { 1471 const struct vnodeop_desc *a_desc; 1472 struct vnode *a_vp; 1473 struct uio *a_uio; 1474 int a_ioflag; 1475 kauth_cred_t a_cred; 1476 } */ *ap = v; 1477 struct puffs_vnreq_read *read_argp; 1478 struct puffs_mount *pmp; 1479 struct vnode *vp; 1480 struct uio *uio; 1481 void *win; 1482 size_t tomove, argsize; 1483 vsize_t bytelen; 1484 int error, ubcflags; 1485 1486 uio = ap->a_uio; 1487 vp = ap->a_vp; 1488 read_argp = NULL; 1489 error = 0; 1490 pmp = MPTOPUFFSMP(vp->v_mount); 1491 1492 /* std sanity */ 1493 if (uio->uio_resid == 0) 1494 return 0; 1495 if (uio->uio_offset < 0) 1496 return EINVAL; 1497 1498 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1499 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1500 1501 ubcflags = 0; 1502 if (UBC_WANT_UNMAP(vp)) 1503 ubcflags = UBC_UNMAP; 1504 1505 while (uio->uio_resid > 0) { 1506 bytelen = MIN(uio->uio_resid, 1507 vp->v_size - uio->uio_offset); 1508 if (bytelen == 0) 1509 break; 1510 1511 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1512 &bytelen, advice, UBC_READ); 1513 error = uiomove(win, bytelen, uio); 1514 ubc_release(win, ubcflags); 1515 if (error) 1516 break; 1517 } 1518 1519 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1520 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1521 } else { 1522 /* 1523 * in case it's not a regular file or we're operating 1524 * uncached, do read in the old-fashioned style, 1525 * i.e. explicit read operations 1526 */ 1527 1528 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1529 argsize = sizeof(struct puffs_vnreq_read); 1530 read_argp = malloc(argsize + tomove, 1531 M_PUFFS, M_WAITOK | M_ZERO); 1532 1533 error = 0; 1534 while (uio->uio_resid > 0) { 1535 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1536 RWARGS(read_argp, ap->a_ioflag, tomove, 1537 uio->uio_offset, ap->a_cred); 1538 1539 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1540 read_argp, argsize, tomove, 1541 ap->a_vp, NULL); 1542 if (error) 1543 break; 1544 1545 if (read_argp->pvnr_resid > tomove) { 1546 error = EINVAL; 1547 break; 1548 } 1549 1550 error = uiomove(read_argp->pvnr_data, 1551 tomove - read_argp->pvnr_resid, uio); 1552 1553 /* 1554 * in case the file is out of juice, resid from 1555 * userspace is != 0. and the error-case is 1556 * quite obvious 1557 */ 1558 if (error || read_argp->pvnr_resid) 1559 break; 1560 } 1561 } 1562 1563 if (read_argp) 1564 free(read_argp, M_PUFFS); 1565 return error; 1566 } 1567 1568 /* 1569 * XXX: in case of a failure, this leaves uio in a bad state. 1570 * We could theoretically copy the uio and iovecs and "replay" 1571 * them the right amount after the userspace trip, but don't 1572 * bother for now. 1573 */ 1574 int 1575 puffs_write(void *v) 1576 { 1577 struct vop_write_args /* { 1578 const struct vnodeop_desc *a_desc; 1579 struct vnode *a_vp; 1580 struct uio *a_uio; 1581 int a_ioflag; 1582 kauth_cred_t a_cred; 1583 } */ *ap = v; 1584 struct puffs_vnreq_write *write_argp; 1585 struct puffs_mount *pmp; 1586 struct uio *uio; 1587 struct vnode *vp; 1588 size_t tomove, argsize; 1589 off_t oldoff, newoff, origoff; 1590 vsize_t bytelen; 1591 int error, uflags; 1592 int ubcflags; 1593 1594 vp = ap->a_vp; 1595 uio = ap->a_uio; 1596 error = uflags = 0; 1597 write_argp = NULL; 1598 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1599 1600 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1601 ubcflags = UBC_WRITE | UBC_PARTIALOK; 1602 if (UBC_WANT_UNMAP(vp)) 1603 ubcflags = UBC_UNMAP; 1604 1605 /* 1606 * userspace *should* be allowed to control this, 1607 * but with UBC it's a bit unclear how to handle it 1608 */ 1609 if (ap->a_ioflag & IO_APPEND) 1610 uio->uio_offset = vp->v_size; 1611 1612 origoff = uio->uio_offset; 1613 while (uio->uio_resid > 0) { 1614 uflags |= PUFFS_UPDATECTIME; 1615 uflags |= PUFFS_UPDATEMTIME; 1616 oldoff = uio->uio_offset; 1617 bytelen = uio->uio_resid; 1618 1619 newoff = oldoff + bytelen; 1620 if (vp->v_size < newoff) { 1621 uvm_vnp_setwritesize(vp, newoff); 1622 } 1623 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1624 ubcflags); 1625 1626 /* 1627 * In case of a ubc_uiomove() error, 1628 * opt to not extend the file at all and 1629 * return an error. Otherwise, if we attempt 1630 * to clear the memory we couldn't fault to, 1631 * we might generate a kernel page fault. 1632 */ 1633 if (vp->v_size < newoff) { 1634 if (error == 0) { 1635 uflags |= PUFFS_UPDATESIZE; 1636 uvm_vnp_setsize(vp, newoff); 1637 } else { 1638 uvm_vnp_setwritesize(vp, vp->v_size); 1639 } 1640 } 1641 if (error) 1642 break; 1643 1644 /* 1645 * If we're writing large files, flush to file server 1646 * every 64k. Otherwise we can very easily exhaust 1647 * kernel and user memory, as the file server cannot 1648 * really keep up with our writing speed. 1649 * 1650 * Note: this does *NOT* honor MNT_ASYNC, because 1651 * that gives userland too much say in the kernel. 1652 */ 1653 if (oldoff >> 16 != uio->uio_offset >> 16) { 1654 simple_lock(&vp->v_interlock); 1655 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1656 uio->uio_offset & ~0xffff, 1657 PGO_CLEANIT | PGO_SYNCIO); 1658 if (error) 1659 break; 1660 } 1661 } 1662 1663 /* synchronous I/O? */ 1664 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1665 simple_lock(&vp->v_interlock); 1666 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1667 round_page(uio->uio_offset), 1668 PGO_CLEANIT | PGO_SYNCIO); 1669 1670 /* write though page cache? */ 1671 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1672 simple_lock(&vp->v_interlock); 1673 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1674 round_page(uio->uio_offset), PGO_CLEANIT); 1675 } 1676 1677 puffs_updatenode(vp, uflags); 1678 } else { 1679 /* tomove is non-increasing */ 1680 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1681 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1682 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1683 1684 while (uio->uio_resid > 0) { 1685 /* move data to buffer */ 1686 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1687 RWARGS(write_argp, ap->a_ioflag, tomove, 1688 uio->uio_offset, ap->a_cred); 1689 error = uiomove(write_argp->pvnr_data, tomove, uio); 1690 if (error) 1691 break; 1692 1693 /* move buffer to userspace */ 1694 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1695 PUFFS_VN_WRITE, write_argp, argsize, 0, 1696 ap->a_vp, NULL); 1697 if (error) 1698 break; 1699 1700 if (write_argp->pvnr_resid > tomove) { 1701 error = EINVAL; 1702 break; 1703 } 1704 1705 /* adjust file size */ 1706 if (vp->v_size < uio->uio_offset) 1707 uvm_vnp_setsize(vp, uio->uio_offset); 1708 1709 /* didn't move everything? bad userspace. bail */ 1710 if (write_argp->pvnr_resid != 0) { 1711 error = EIO; 1712 break; 1713 } 1714 } 1715 } 1716 1717 if (write_argp) 1718 free(write_argp, M_PUFFS); 1719 return error; 1720 } 1721 1722 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1723 1724 #define FCNIOCTL_ARG_MAX 1<<16 1725 int 1726 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1727 { 1728 1729 /* currently not supported */ 1730 return EOPNOTSUPP; 1731 #if 0 1732 /* struct vop_ioctl_args { 1733 const struct vnodeop_desc *a_desc; 1734 struct vnode *a_vp; 1735 u_long a_command; 1736 void *a_data; 1737 int a_fflag; 1738 kauth_cred_t a_cred; 1739 struct lwp *a_l; 1740 }*ap = v; */ 1741 struct puffs_mount *pmp; 1742 struct puffs_sizepark pspark; 1743 void *kernbuf; 1744 size_t copylen; 1745 int error; 1746 1747 PUFFS_VNREQ(fcnioctl); 1748 1749 /* 1750 * Since this op gives the filesystem (almost) complete control on 1751 * how much it is allowed to copy from the calling process 1752 * address space, do not enable it by default, since it would 1753 * be a whopping security hole. 1754 */ 1755 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1756 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1757 return EINVAL; /* only shoe that fits */ 1758 1759 /* fill in sizereq and store it */ 1760 pspark.pkso_reqid = puffs_getreqid(pmp); 1761 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1762 pspark.pkso_copybuf = ap->a_data; 1763 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1764 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1765 1766 /* then fill in actual request and shoot it off */ 1767 fcnioctl_arg.pvnr_command = ap->a_command; 1768 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1769 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1770 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1771 1772 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1773 &fcnioctl_arg, sizeof(fcnioctl_arg), 0, ap->a_vp, 1774 pspark.pkso_reqid, ap->a_vp, NULL); 1775 1776 /* if we don't need to copy data, we're done */ 1777 if (error || !fcnioctl_arg.pvnr_copyback) 1778 return error; 1779 1780 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1781 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1782 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1783 if (error) 1784 goto out; 1785 error = copyout(kernbuf, ap->a_data, copylen); 1786 1787 out: 1788 free(kernbuf, M_PUFFS); 1789 return error; 1790 #endif 1791 } 1792 1793 int 1794 puffs_ioctl(void *v) 1795 { 1796 1797 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1798 } 1799 1800 int 1801 puffs_fcntl(void *v) 1802 { 1803 1804 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1805 } 1806 1807 int 1808 puffs_print(void *v) 1809 { 1810 struct vop_print_args /* { 1811 struct vnode *a_vp; 1812 } */ *ap = v; 1813 struct puffs_mount *pmp; 1814 struct vnode *vp = ap->a_vp; 1815 struct puffs_node *pn = vp->v_data; 1816 1817 PUFFS_VNREQ(print); 1818 1819 pmp = MPTOPUFFSMP(vp->v_mount); 1820 1821 /* kernel portion */ 1822 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1823 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1824 if (vp->v_type == VFIFO) 1825 fifo_printinfo(vp); 1826 lockmgr_printinfo(&vp->v_lock); 1827 1828 /* userspace portion */ 1829 if (EXISTSOP(pmp, PRINT)) 1830 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1831 &print_arg, sizeof(print_arg), 0, ap->a_vp, NULL); 1832 1833 return 0; 1834 } 1835 1836 int 1837 puffs_pathconf(void *v) 1838 { 1839 struct vop_pathconf_args /* { 1840 const struct vnodeop_desc *a_desc; 1841 struct vnode *a_vp; 1842 int a_name; 1843 register_t *a_retval; 1844 } */ *ap = v; 1845 int error; 1846 1847 PUFFS_VNREQ(pathconf); 1848 1849 pathconf_arg.pvnr_name = ap->a_name; 1850 1851 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1852 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 0, 1853 ap->a_vp, NULL); 1854 if (error) 1855 return error; 1856 1857 *ap->a_retval = pathconf_arg.pvnr_retval; 1858 1859 return 0; 1860 } 1861 1862 int 1863 puffs_advlock(void *v) 1864 { 1865 struct vop_advlock_args /* { 1866 const struct vnodeop_desc *a_desc; 1867 struct vnode *a_vp; 1868 void *a_id; 1869 int a_op; 1870 struct flock *a_fl; 1871 int a_flags; 1872 } */ *ap = v; 1873 int error; 1874 1875 PUFFS_VNREQ(advlock); 1876 1877 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1878 if (error) 1879 return error; 1880 advlock_arg.pvnr_id = ap->a_id; 1881 advlock_arg.pvnr_op = ap->a_op; 1882 advlock_arg.pvnr_flags = ap->a_flags; 1883 1884 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1885 &advlock_arg, sizeof(advlock_arg), 0, ap->a_vp, NULL); 1886 } 1887 1888 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 1889 #define BIOREAD(bp) (bp->b_flags & B_READ) 1890 #define BIOWRITE(bp) ((bp->b_flags & B_READ) == 0) 1891 1892 /* 1893 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1894 */ 1895 int 1896 puffs_strategy(void *v) 1897 { 1898 struct vop_strategy_args /* { 1899 const struct vnodeop_desc *a_desc; 1900 struct vnode *a_vp; 1901 struct buf *a_bp; 1902 } */ *ap = v; 1903 struct puffs_mount *pmp; 1904 struct vnode *vp = ap->a_vp; 1905 struct puffs_node *pn; 1906 struct puffs_vnreq_readwrite *rw_argp = NULL; 1907 struct buf *bp; 1908 size_t argsize; 1909 size_t tomove, moved; 1910 int error, dofaf; 1911 1912 pmp = MPTOPUFFSMP(vp->v_mount); 1913 bp = ap->a_bp; 1914 error = 0; 1915 dofaf = 0; 1916 pn = VPTOPP(vp); 1917 1918 if ((BIOREAD(bp) && !EXISTSOP(pmp, READ)) 1919 || (BIOWRITE(bp) && !EXISTSOP(pmp, WRITE))) 1920 ERROUT(EOPNOTSUPP); 1921 1922 /* 1923 * Short-circuit optimization: don't flush buffer in between 1924 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 1925 */ 1926 if (pn->pn_stat & PNODE_DYING) { 1927 KASSERT(BIOWRITE(bp)); 1928 bp->b_resid = 0; 1929 goto out; 1930 } 1931 1932 #ifdef DIAGNOSTIC 1933 if (bp->b_bcount > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1934 panic("puffs_strategy: wildly inappropriate buf bcount %d", 1935 bp->b_bcount); 1936 #endif 1937 1938 /* 1939 * See explanation for the necessity of a FAF in puffs_fsync. 1940 * 1941 * Also, do FAF in case we're suspending. 1942 * See puffs_vfsops.c:pageflush() 1943 */ 1944 if (BIOWRITE(bp)) { 1945 simple_lock(&vp->v_interlock); 1946 if (vp->v_flag & VXLOCK) 1947 dofaf = 1; 1948 if (pn->pn_stat & PNODE_SUSPEND) 1949 dofaf = 1; 1950 simple_unlock(&vp->v_interlock); 1951 } 1952 1953 if (BIOASYNC(bp)) 1954 dofaf = 1; 1955 1956 #ifdef DIAGNOSTIC 1957 if (curlwp == uvm.pagedaemon_lwp) 1958 KASSERT(dofaf); 1959 #endif 1960 1961 /* allocate transport structure */ 1962 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 1963 argsize = sizeof(struct puffs_vnreq_readwrite); 1964 rw_argp = malloc(argsize + tomove, M_PUFFS, 1965 M_ZERO | (dofaf ? M_NOWAIT : M_WAITOK)); 1966 if (rw_argp == NULL) 1967 ERROUT(ENOMEM); 1968 RWARGS(rw_argp, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 1969 1970 /* 2x2 cases: read/write, faf/nofaf */ 1971 if (BIOREAD(bp)) { 1972 if (dofaf) { 1973 puffs_vntouser_call(pmp, PUFFS_VN_READ, rw_argp, 1974 argsize, tomove, puffs_parkdone_asyncbioread, 1975 bp, vp, NULL); 1976 } else { 1977 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1978 rw_argp, argsize, tomove, vp, NULL); 1979 if (error) 1980 goto out; 1981 1982 if (rw_argp->pvnr_resid > tomove) 1983 ERROUT(EINVAL); 1984 1985 moved = tomove - rw_argp->pvnr_resid; 1986 1987 (void)memcpy(bp->b_data, rw_argp->pvnr_data, moved); 1988 bp->b_resid = bp->b_bcount - moved; 1989 } 1990 } else { 1991 /* 1992 * make pages read-only before we write them if we want 1993 * write caching info 1994 */ 1995 if (PUFFS_WCACHEINFO(pmp)) { 1996 struct uvm_object *uobj = &vp->v_uobj; 1997 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 1998 struct vm_page *vmp; 1999 int i; 2000 2001 for (i = 0; i < npages; i++) { 2002 vmp= uvm_pageratop((vaddr_t)bp->b_data 2003 + (i << PAGE_SHIFT)); 2004 DPRINTF(("puffs_strategy: write-protecting " 2005 "vp %p page %p, offset %" PRId64"\n", 2006 vp, vmp, vmp->offset)); 2007 simple_lock(&uobj->vmobjlock); 2008 vmp->flags |= PG_RDONLY; 2009 pmap_page_protect(vmp, VM_PROT_READ); 2010 simple_unlock(&uobj->vmobjlock); 2011 } 2012 } 2013 2014 (void)memcpy(&rw_argp->pvnr_data, bp->b_data, tomove); 2015 if (dofaf) { 2016 /* 2017 * assume FAF moves everything. frankly, we don't 2018 * really have a choice. 2019 */ 2020 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 2021 PUFFS_VN_WRITE, rw_argp, argsize + tomove, vp); 2022 bp->b_resid = bp->b_bcount - tomove; 2023 } else { 2024 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 2025 PUFFS_VN_WRITE, rw_argp, argsize + tomove, 2026 0, vp, NULL); 2027 if (error) 2028 goto out; 2029 2030 moved = tomove - rw_argp->pvnr_resid; 2031 if (rw_argp->pvnr_resid > tomove) 2032 ERROUT(EINVAL); 2033 2034 bp->b_resid = bp->b_bcount - moved; 2035 if (rw_argp->pvnr_resid != 0) 2036 ERROUT(EIO); 2037 } 2038 } 2039 2040 out: 2041 KASSERT(dofaf == 0 || error == 0 || rw_argp == NULL); 2042 if (rw_argp && !dofaf) 2043 free(rw_argp, M_PUFFS); 2044 2045 if (error) { 2046 bp->b_error = error; 2047 bp->b_flags |= B_ERROR; 2048 } 2049 2050 if (error || !(BIOREAD(bp) && BIOASYNC(bp))) 2051 biodone(bp); 2052 2053 return error; 2054 } 2055 2056 int 2057 puffs_mmap(void *v) 2058 { 2059 struct vop_mmap_args /* { 2060 const struct vnodeop_desc *a_desc; 2061 struct vnode *a_vp; 2062 int a_fflags; 2063 kauth_cred_t a_cred; 2064 struct lwp *a_l; 2065 } */ *ap = v; 2066 struct puffs_mount *pmp; 2067 int error; 2068 2069 PUFFS_VNREQ(mmap); 2070 2071 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2072 2073 if (!PUFFS_USE_PAGECACHE(pmp)) 2074 return genfs_eopnotsupp(v); 2075 2076 if (EXISTSOP(pmp, MMAP)) { 2077 mmap_arg.pvnr_fflags = ap->a_fflags; 2078 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 2079 puffs_cidcvt(&mmap_arg.pvnr_cid, ap->a_l); 2080 2081 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 2082 &mmap_arg, sizeof(mmap_arg), 0, 2083 ap->a_vp, NULL); 2084 } else { 2085 error = genfs_mmap(v); 2086 } 2087 2088 return error; 2089 } 2090 2091 2092 /* 2093 * The rest don't get a free trip to userspace and back, they 2094 * have to stay within the kernel. 2095 */ 2096 2097 /* 2098 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2099 * well, maybe somehow, somewhere, some day .... 2100 */ 2101 int 2102 puffs_bmap(void *v) 2103 { 2104 struct vop_bmap_args /* { 2105 const struct vnodeop_desc *a_desc; 2106 struct vnode *a_vp; 2107 daddr_t a_bn; 2108 struct vnode **a_vpp; 2109 daddr_t *a_bnp; 2110 int *a_runp; 2111 } */ *ap = v; 2112 struct puffs_mount *pmp; 2113 2114 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2115 2116 if (ap->a_vpp) 2117 *ap->a_vpp = ap->a_vp; 2118 if (ap->a_bnp) 2119 *ap->a_bnp = ap->a_bn; 2120 if (ap->a_runp) 2121 *ap->a_runp 2122 = (PUFFS_TOMOVE(pmp->pmp_req_maxsize, pmp)>>DEV_BSHIFT) - 1; 2123 2124 return 0; 2125 } 2126 2127 /* 2128 * Handle getpages faults in puffs. We let genfs_getpages() do most 2129 * of the dirty work, but we come in this route to do accounting tasks. 2130 * If the user server has specified functions for cache notifications 2131 * about reads and/or writes, we record which type of operation we got, 2132 * for which page range, and proceed to issue a FAF notification to the 2133 * server about it. 2134 */ 2135 int 2136 puffs_getpages(void *v) 2137 { 2138 struct vop_getpages_args /* { 2139 const struct vnodeop_desc *a_desc; 2140 struct vnode *a_vp; 2141 voff_t a_offset; 2142 struct vm_page **a_m; 2143 int *a_count; 2144 int a_centeridx; 2145 vm_prot_t a_access_type; 2146 int a_advice; 2147 int a_flags; 2148 } */ *ap = v; 2149 struct puffs_mount *pmp; 2150 struct vnode *vp; 2151 struct vm_page **pgs; 2152 struct puffs_cacheinfo *pcinfo = NULL; 2153 struct puffs_cacherun *pcrun; 2154 void *parkmem = NULL; 2155 size_t runsizes; 2156 int i, npages, si, streakon; 2157 int error, locked, write; 2158 2159 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2160 npages = *ap->a_count; 2161 pgs = ap->a_m; 2162 vp = ap->a_vp; 2163 locked = (ap->a_flags & PGO_LOCKED) != 0; 2164 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2165 2166 /* ccg xnaht - gets Wuninitialized wrong */ 2167 pcrun = NULL; 2168 runsizes = 0; 2169 2170 if (write && PUFFS_WCACHEINFO(pmp)) { 2171 /* allocate worst-case memory */ 2172 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2173 pcinfo = malloc(sizeof(struct puffs_cacheinfo) + runsizes, 2174 M_PUFFS, M_ZERO | locked ? M_NOWAIT : M_WAITOK); 2175 2176 /* 2177 * can't block if we're locked and can't mess up caching 2178 * information for fs server. so come back later, please 2179 */ 2180 if (pcinfo == NULL) 2181 ERROUT(ENOMEM); 2182 2183 parkmem = puffs_park_alloc(locked == 0); 2184 if (parkmem == NULL) 2185 ERROUT(ENOMEM); 2186 2187 pcrun = pcinfo->pcache_runs; 2188 } 2189 2190 error = genfs_getpages(v); 2191 if (error) 2192 goto out; 2193 2194 if (PUFFS_WCACHEINFO(pmp) == 0) 2195 goto out; 2196 2197 /* 2198 * Let's see whose fault it was and inform the user server of 2199 * possibly read/written pages. Map pages from read faults 2200 * strictly read-only, since otherwise we might miss info on 2201 * when the page is actually write-faulted to. 2202 */ 2203 if (!locked) 2204 simple_lock(&vp->v_uobj.vmobjlock); 2205 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2206 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2207 if (streakon && write) { 2208 streakon = 0; 2209 pcrun[si].pcache_runend 2210 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2211 si++; 2212 } 2213 continue; 2214 } 2215 if (streakon == 0 && write) { 2216 streakon = 1; 2217 pcrun[si].pcache_runstart = pgs[i]->offset; 2218 } 2219 2220 if (!write) 2221 pgs[i]->flags |= PG_RDONLY; 2222 } 2223 /* was the last page part of our streak? */ 2224 if (streakon) { 2225 pcrun[si].pcache_runend 2226 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2227 si++; 2228 } 2229 if (!locked) 2230 simple_unlock(&vp->v_uobj.vmobjlock); 2231 2232 KASSERT(si <= (npages / 2) + 1); 2233 2234 /* send results to userspace */ 2235 if (write) 2236 puffs_cacheop(pmp, parkmem, pcinfo, 2237 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2238 2239 out: 2240 if (error) { 2241 if (pcinfo != NULL) 2242 free(pcinfo, M_PUFFS); 2243 if (parkmem != NULL) 2244 puffs_park_release(parkmem, 1); 2245 } 2246 2247 return error; 2248 } 2249 2250 int 2251 puffs_lock(void *v) 2252 { 2253 struct vop_lock_args /* { 2254 struct vnode *a_vp; 2255 int a_flags; 2256 }*/ *ap = v; 2257 struct vnode *vp = ap->a_vp; 2258 struct mount *mp = vp->v_mount; 2259 2260 #if 0 2261 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2262 #endif 2263 2264 /* 2265 * XXX: this avoids deadlocking when we're suspending. 2266 * e.g. some ops holding the vnode lock might be blocked for 2267 * the vfs transaction lock so we'd deadlock. 2268 * 2269 * Now once again this is skating on the thin ice of modern life, 2270 * since we are breaking the consistency guarantee provided 2271 * _to the user server_ by vnode locking. Hopefully this will 2272 * get fixed soon enough by getting rid of the dependency on 2273 * vnode locks alltogether. 2274 */ 2275 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2276 if (ap->a_flags & LK_INTERLOCK) 2277 simple_unlock(&vp->v_interlock); 2278 return 0; 2279 } 2280 2281 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2282 } 2283 2284 int 2285 puffs_unlock(void *v) 2286 { 2287 struct vop_unlock_args /* { 2288 struct vnode *a_vp; 2289 int a_flags; 2290 } */ *ap = v; 2291 struct vnode *vp = ap->a_vp; 2292 struct mount *mp = vp->v_mount; 2293 2294 #if 0 2295 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2296 #endif 2297 2298 /* XXX: see puffs_lock() */ 2299 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2300 if (ap->a_flags & LK_INTERLOCK) 2301 simple_unlock(&vp->v_interlock); 2302 return 0; 2303 } 2304 2305 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2306 } 2307 2308 int 2309 puffs_islocked(void *v) 2310 { 2311 struct vop_islocked_args *ap = v; 2312 int rv; 2313 2314 rv = lockstatus(&ap->a_vp->v_lock); 2315 return rv; 2316 } 2317 2318 int 2319 puffs_generic(void *v) 2320 { 2321 struct vop_generic_args *ap = v; 2322 2323 (void)ap; 2324 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2325 2326 return EOPNOTSUPP; 2327 } 2328 2329 2330 /* 2331 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2332 * FAF update information for the puffs node first. 2333 */ 2334 int 2335 puffs_spec_read(void *v) 2336 { 2337 struct vop_read_args /* { 2338 const struct vnodeop_desc *a_desc; 2339 struct vnode *a_vp; 2340 struct uio *a_uio; 2341 int a_ioflag; 2342 kauth_cred_t a_cred; 2343 } */ *ap = v; 2344 2345 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2346 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2347 } 2348 2349 int 2350 puffs_spec_write(void *v) 2351 { 2352 struct vop_write_args /* { 2353 const struct vnodeop_desc *a_desc; 2354 struct vnode *a_vp; 2355 struct uio *a_uio; 2356 int a_ioflag; 2357 kauth_cred_t a_cred; 2358 }*/ *ap = v; 2359 2360 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2361 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2362 } 2363 2364 int 2365 puffs_fifo_read(void *v) 2366 { 2367 struct vop_read_args /* { 2368 const struct vnodeop_desc *a_desc; 2369 struct vnode *a_vp; 2370 struct uio *a_uio; 2371 int a_ioflag; 2372 kauth_cred_t a_cred; 2373 } */ *ap = v; 2374 2375 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2376 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2377 } 2378 2379 int 2380 puffs_fifo_write(void *v) 2381 { 2382 struct vop_write_args /* { 2383 const struct vnodeop_desc *a_desc; 2384 struct vnode *a_vp; 2385 struct uio *a_uio; 2386 int a_ioflag; 2387 kauth_cred_t a_cred; 2388 }*/ *ap = v; 2389 2390 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2391 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2392 } 2393
Indexes created Tue Sep 30 20:09:53 GMT 2025