puffs_vnops.c revision 1.93
1 /* $NetBSD: puffs_vnops.c,v 1.93 2007/07/27 09:50:36 yamt 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 1.93 2007/07/27 09:50:36 yamt 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 pn->pn_serversize = rvap->va_size; 763 } 764 } 765 766 return 0; 767 } 768 769 static int 770 puffs_dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, 771 struct lwp *l, int chsize) 772 { 773 struct puffs_node *pn = vp->v_data; 774 int error; 775 776 PUFFS_VNREQ(setattr); 777 778 /* 779 * Flush metacache first. If we are called with some explicit 780 * parameters, treat them as information overriding metacache 781 * information. 782 */ 783 if (pn->pn_stat & PNODE_METACACHE_MASK) { 784 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 785 && vap->va_atime.tv_sec == VNOVAL) 786 vap->va_atime = pn->pn_mc_atime; 787 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 788 && vap->va_ctime.tv_sec == VNOVAL) 789 vap->va_ctime = pn->pn_mc_ctime; 790 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 791 && vap->va_mtime.tv_sec == VNOVAL) 792 vap->va_mtime = pn->pn_mc_mtime; 793 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 794 && vap->va_size == VNOVAL) 795 vap->va_size = pn->pn_mc_size; 796 797 pn->pn_stat &= ~PNODE_METACACHE_MASK; 798 } 799 800 (void)memcpy(&setattr_arg.pvnr_va, vap, sizeof(struct vattr)); 801 puffs_credcvt(&setattr_arg.pvnr_cred, cred); 802 puffs_cidcvt(&setattr_arg.pvnr_cid, l); 803 804 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_SETATTR, 805 &setattr_arg, sizeof(setattr_arg), 0, vp, NULL); 806 if (error) 807 return error; 808 809 if (vap->va_size != VNOVAL) { 810 pn->pn_serversize = vap->va_size; 811 if (chsize) 812 uvm_vnp_setsize(vp, vap->va_size); 813 } 814 815 return 0; 816 } 817 818 int 819 puffs_setattr(void *v) 820 { 821 struct vop_getattr_args /* { 822 const struct vnodeop_desc *a_desc; 823 struct vnode *a_vp; 824 struct vattr *a_vap; 825 kauth_cred_t a_cred; 826 struct lwp *a_l; 827 } */ *ap = v; 828 829 return puffs_dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, ap->a_l, 1); 830 } 831 832 int 833 puffs_inactive(void *v) 834 { 835 struct vop_inactive_args /* { 836 const struct vnodeop_desc *a_desc; 837 struct vnode *a_vp; 838 struct lwp *a_l; 839 } */ *ap = v; 840 struct puffs_mount *pmp; 841 struct puffs_node *pnode; 842 int rv, call; 843 844 PUFFS_VNREQ(inactive); 845 846 /* 847 * XXX: think about this after we really start unlocking 848 * when going to userspace 849 */ 850 pnode = ap->a_vp->v_data; 851 852 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 853 854 puffs_cidcvt(&inactive_arg.pvnr_cid, ap->a_l); 855 856 if (EXISTSOP(pmp, INACTIVE)) 857 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 858 if ((pnode->pn_stat & PNODE_DOINACT) || ALLOPS(pmp)) 859 call = 1; 860 else 861 call = 0; 862 else 863 call = 1; 864 else 865 call = 0; 866 867 if (call) 868 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 869 &inactive_arg, sizeof(inactive_arg), 0, ap->a_vp, NULL); 870 else 871 rv = 1; /* see below */ 872 pnode->pn_stat &= ~PNODE_DOINACT; 873 874 VOP_UNLOCK(ap->a_vp, 0); 875 876 /* 877 * file server thinks it's gone? then don't be afraid care, 878 * node's life was already all it would ever be 879 */ 880 if (pnode->pn_stat & PNODE_NOREFS) { 881 pnode->pn_stat |= PNODE_DYING; 882 vrecycle(ap->a_vp, NULL, ap->a_l); 883 } 884 885 return 0; 886 } 887 888 /* 889 * always FAF, we don't really care if the server wants to fail to 890 * reclaim the node or not 891 */ 892 int 893 puffs_reclaim(void *v) 894 { 895 struct vop_reclaim_args /* { 896 const struct vnodeop_desc *a_desc; 897 struct vnode *a_vp; 898 struct lwp *a_l; 899 } */ *ap = v; 900 struct puffs_mount *pmp; 901 struct puffs_vnreq_reclaim *reclaim_argp; 902 903 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 904 905 /* 906 * first things first: check if someone is trying to reclaim the 907 * root vnode. do not allow that to travel to userspace. 908 * Note that we don't need to take the lock similarly to 909 * puffs_root(), since there is only one of us. 910 */ 911 if (ap->a_vp->v_flag & VROOT) { 912 mutex_enter(&pmp->pmp_lock); 913 KASSERT(pmp->pmp_root != NULL); 914 pmp->pmp_root = NULL; 915 mutex_exit(&pmp->pmp_lock); 916 goto out; 917 } 918 919 if (!EXISTSOP(pmp, RECLAIM)) 920 goto out; 921 922 reclaim_argp = malloc(sizeof(struct puffs_vnreq_reclaim), 923 M_PUFFS, M_WAITOK | M_ZERO); 924 puffs_cidcvt(&reclaim_argp->pvnr_cid, ap->a_l); 925 926 puffs_vntouser_faf(pmp, PUFFS_VN_RECLAIM, 927 reclaim_argp, sizeof(struct puffs_vnreq_reclaim), ap->a_vp); 928 929 out: 930 if (PUFFS_USE_NAMECACHE(pmp)) 931 cache_purge(ap->a_vp); 932 puffs_putvnode(ap->a_vp); 933 934 return 0; 935 } 936 937 #define CSIZE sizeof(**ap->a_cookies) 938 int 939 puffs_readdir(void *v) 940 { 941 struct vop_readdir_args /* { 942 const struct vnodeop_desc *a_desc; 943 struct vnode *a_vp; 944 struct uio *a_uio; 945 kauth_cred_t a_cred; 946 int *a_eofflag; 947 off_t **a_cookies; 948 int *a_ncookies; 949 } */ *ap = v; 950 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 951 struct puffs_vnreq_readdir *readdir_argp; 952 size_t argsize, tomove, cookiemem, cookiesmax; 953 struct uio *uio = ap->a_uio; 954 size_t howmuch, resid; 955 int error; 956 957 /* 958 * ok, so we need: resid + cookiemem = maxreq 959 * => resid + cookiesize * (resid/minsize) = maxreq 960 * => resid + cookiesize/minsize * resid = maxreq 961 * => (cookiesize/minsize + 1) * resid = maxreq 962 * => resid = maxreq / (cookiesize/minsize + 1) 963 * 964 * Since cookiesize <= minsize and we're not very big on floats, 965 * we approximate that to be 1. Therefore: 966 * 967 * resid = maxreq / 2; 968 * 969 * Well, at least we didn't have to use differential equations 970 * or the Gram-Schmidt process. 971 * 972 * (yes, I'm very afraid of this) 973 */ 974 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 975 976 if (ap->a_cookies) { 977 KASSERT(ap->a_ncookies != NULL); 978 if (pmp->pmp_args.pa_fhsize == 0) 979 return EOPNOTSUPP; 980 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 981 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 982 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 983 } else { 984 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 985 cookiesmax = 0; 986 cookiemem = 0; 987 } 988 989 argsize = sizeof(struct puffs_vnreq_readdir); 990 tomove = resid + cookiemem; 991 readdir_argp = malloc(argsize + tomove, M_PUFFS, M_ZERO | M_WAITOK); 992 993 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 994 readdir_argp->pvnr_offset = uio->uio_offset; 995 readdir_argp->pvnr_resid = resid; 996 readdir_argp->pvnr_ncookies = cookiesmax; 997 readdir_argp->pvnr_eofflag = 0; 998 readdir_argp->pvnr_dentoff = cookiemem; 999 1000 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1001 PUFFS_VN_READDIR, readdir_argp, argsize, tomove, 1002 ap->a_vp, NULL); 1003 if (error) 1004 goto out; 1005 1006 /* userspace is cheating? */ 1007 if (readdir_argp->pvnr_resid > resid 1008 || readdir_argp->pvnr_ncookies > cookiesmax) 1009 ERROUT(EINVAL); 1010 1011 /* check eof */ 1012 if (readdir_argp->pvnr_eofflag) 1013 *ap->a_eofflag = 1; 1014 1015 /* bouncy-wouncy with the directory data */ 1016 howmuch = resid - readdir_argp->pvnr_resid; 1017 1018 /* force eof if no data was returned (getcwd() needs this) */ 1019 if (howmuch == 0) { 1020 *ap->a_eofflag = 1; 1021 goto out; 1022 } 1023 1024 error = uiomove(readdir_argp->pvnr_data + cookiemem, howmuch, uio); 1025 if (error) 1026 goto out; 1027 1028 /* provide cookies to caller if so desired */ 1029 if (ap->a_cookies) { 1030 *ap->a_cookies = malloc(readdir_argp->pvnr_ncookies*CSIZE, 1031 M_TEMP, M_WAITOK); 1032 *ap->a_ncookies = readdir_argp->pvnr_ncookies; 1033 memcpy(*ap->a_cookies, readdir_argp->pvnr_data, 1034 *ap->a_ncookies*CSIZE); 1035 } 1036 1037 /* next readdir starts here */ 1038 uio->uio_offset = readdir_argp->pvnr_offset; 1039 1040 out: 1041 free(readdir_argp, M_PUFFS); 1042 return error; 1043 } 1044 #undef CSIZE 1045 1046 /* 1047 * poll works by consuming the bitmask in pn_revents. If there are 1048 * events available, poll returns immediately. If not, it issues a 1049 * poll to userspace, selrecords itself and returns with no available 1050 * events. When the file server returns, it executes puffs_parkdone_poll(), 1051 * where available events are added to the bitmask. selnotify() is 1052 * then also executed by that function causing us to enter here again 1053 * and hopefully find the missing bits (unless someone got them first, 1054 * in which case it starts all over again). 1055 */ 1056 int 1057 puffs_poll(void *v) 1058 { 1059 struct vop_poll_args /* { 1060 const struct vnodeop_desc *a_desc; 1061 struct vnode *a_vp; 1062 int a_events; 1063 struct lwp *a_l; 1064 }*/ *ap = v; 1065 struct vnode *vp = ap->a_vp; 1066 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1067 struct puffs_vnreq_poll *poll_argp; 1068 struct puffs_node *pn = vp->v_data; 1069 int events; 1070 1071 if (EXISTSOP(pmp, POLL)) { 1072 mutex_enter(&pn->pn_mtx); 1073 events = pn->pn_revents & ap->a_events; 1074 if (events & ap->a_events) { 1075 pn->pn_revents &= ~ap->a_events; 1076 mutex_exit(&pn->pn_mtx); 1077 1078 return events; 1079 } else { 1080 puffs_referencenode(pn); 1081 mutex_exit(&pn->pn_mtx); 1082 1083 /* freed in puffs_parkdone_poll */ 1084 poll_argp = malloc(sizeof(struct puffs_vnreq_poll), 1085 M_PUFFS, M_ZERO | M_WAITOK); 1086 1087 poll_argp->pvnr_events = ap->a_events; 1088 puffs_cidcvt(&poll_argp->pvnr_cid, ap->a_l); 1089 1090 selrecord(ap->a_l, &pn->pn_sel); 1091 puffs_vntouser_call(pmp, PUFFS_VN_POLL, 1092 poll_argp, sizeof(struct puffs_vnreq_poll), 0, 1093 puffs_parkdone_poll, pn, 1094 vp, NULL); 1095 1096 return 0; 1097 } 1098 } else { 1099 return genfs_poll(v); 1100 } 1101 } 1102 1103 int 1104 puffs_fsync(void *v) 1105 { 1106 struct vop_fsync_args /* { 1107 const struct vnodeop_desc *a_desc; 1108 struct vnode *a_vp; 1109 kauth_cred_t a_cred; 1110 int a_flags; 1111 off_t a_offlo; 1112 off_t a_offhi; 1113 struct lwp *a_l; 1114 } */ *ap = v; 1115 struct vattr va; 1116 struct puffs_mount *pmp; 1117 struct puffs_vnreq_fsync *fsync_argp; 1118 struct vnode *vp; 1119 struct puffs_node *pn; 1120 int pflags, error, dofaf; 1121 1122 PUFFS_VNREQ(fsync); 1123 1124 vp = ap->a_vp; 1125 pn = VPTOPP(vp); 1126 pmp = MPTOPUFFSMP(vp->v_mount); 1127 1128 /* flush out information from our metacache, see vop_setattr */ 1129 if (pn->pn_stat & PNODE_METACACHE_MASK 1130 && (pn->pn_stat & PNODE_DYING) == 0) { 1131 vattr_null(&va); 1132 error = VOP_SETATTR(vp, &va, FSCRED, NULL); 1133 if (error) 1134 return error; 1135 } 1136 1137 /* 1138 * flush pages to avoid being overly dirty 1139 */ 1140 pflags = PGO_CLEANIT; 1141 if (ap->a_flags & FSYNC_WAIT) 1142 pflags |= PGO_SYNCIO; 1143 simple_lock(&vp->v_interlock); 1144 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1145 round_page(ap->a_offhi), pflags); 1146 if (error) 1147 return error; 1148 1149 /* 1150 * HELLO! We exit already here if the user server does not 1151 * support fsync OR if we should call fsync for a node which 1152 * has references neither in the kernel or the fs server. 1153 * Otherwise we continue to issue fsync() forward. 1154 */ 1155 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1156 return 0; 1157 1158 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1159 /* 1160 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1161 * only FAFs for those. Otherwise there's a danger of deadlock, 1162 * since the execution context here might be the user server 1163 * doing some operation on another fs, which in turn caused a 1164 * vnode to be reclaimed from the freelist for this fs. 1165 */ 1166 if (dofaf == 0) { 1167 simple_lock(&vp->v_interlock); 1168 if (vp->v_flag & VXLOCK) 1169 dofaf = 1; 1170 simple_unlock(&vp->v_interlock); 1171 } 1172 1173 if (dofaf == 0) { 1174 fsync_argp = &fsync_arg; 1175 } else { 1176 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 1177 M_PUFFS, M_ZERO | M_NOWAIT); 1178 if (fsync_argp == NULL) 1179 return ENOMEM; 1180 } 1181 1182 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 1183 fsync_argp->pvnr_flags = ap->a_flags; 1184 fsync_argp->pvnr_offlo = ap->a_offlo; 1185 fsync_argp->pvnr_offhi = ap->a_offhi; 1186 puffs_cidcvt(&fsync_argp->pvnr_cid, ap->a_l); 1187 1188 /* 1189 * XXX: see comment at puffs_getattr about locking 1190 * 1191 * If we are not required to wait, do a FAF operation. 1192 * Otherwise block here. 1193 */ 1194 if (dofaf == 0) { 1195 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1196 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 0, 1197 vp, NULL); 1198 } else { 1199 /* FAF is always "succesful" */ 1200 error = 0; 1201 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1202 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), vp); 1203 } 1204 1205 return error; 1206 } 1207 1208 int 1209 puffs_seek(void *v) 1210 { 1211 struct vop_seek_args /* { 1212 const struct vnodeop_desc *a_desc; 1213 struct vnode *a_vp; 1214 off_t a_oldoff; 1215 off_t a_newoff; 1216 kauth_cred_t a_cred; 1217 } */ *ap = v; 1218 1219 PUFFS_VNREQ(seek); 1220 1221 seek_arg.pvnr_oldoff = ap->a_oldoff; 1222 seek_arg.pvnr_newoff = ap->a_newoff; 1223 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1224 1225 /* 1226 * XXX: seems like seek is called with an unlocked vp, but 1227 * it can't hurt to play safe 1228 */ 1229 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1230 &seek_arg, sizeof(seek_arg), 0, ap->a_vp, NULL); 1231 } 1232 1233 int 1234 puffs_remove(void *v) 1235 { 1236 struct vop_remove_args /* { 1237 const struct vnodeop_desc *a_desc; 1238 struct vnode *a_dvp; 1239 struct vnode *a_vp; 1240 struct componentname *a_cnp; 1241 } */ *ap = v; 1242 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1243 int error; 1244 1245 PUFFS_VNREQ(remove); 1246 1247 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1248 puffs_makecn(&remove_arg.pvnr_cn, &remove_arg.pvnr_cn_cred, 1249 &remove_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1250 1251 error = puffs_vntouser(pmp, PUFFS_VN_REMOVE, 1252 &remove_arg, sizeof(remove_arg), 0, ap->a_dvp, ap->a_vp); 1253 1254 vput(ap->a_vp); 1255 if (ap->a_dvp == ap->a_vp) 1256 vrele(ap->a_dvp); 1257 else 1258 vput(ap->a_dvp); 1259 1260 return error; 1261 } 1262 1263 int 1264 puffs_mkdir(void *v) 1265 { 1266 struct vop_mkdir_args /* { 1267 const struct vnodeop_desc *a_desc; 1268 struct vnode *a_dvp; 1269 struct vnode **a_vpp; 1270 struct componentname *a_cnp; 1271 struct vattr *a_vap; 1272 } */ *ap = v; 1273 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1274 int error; 1275 1276 PUFFS_VNREQ(mkdir); 1277 1278 puffs_makecn(&mkdir_arg.pvnr_cn, &mkdir_arg.pvnr_cn_cred, 1279 &mkdir_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1280 mkdir_arg.pvnr_va = *ap->a_vap; 1281 1282 error = puffs_vntouser(pmp, PUFFS_VN_MKDIR, 1283 &mkdir_arg, sizeof(mkdir_arg), 0, ap->a_dvp, NULL); 1284 if (error) 1285 goto out; 1286 1287 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1288 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1289 1290 out: 1291 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1292 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1293 vput(ap->a_dvp); 1294 return error; 1295 } 1296 1297 int 1298 puffs_rmdir(void *v) 1299 { 1300 struct vop_rmdir_args /* { 1301 const struct vnodeop_desc *a_desc; 1302 struct vnode *a_dvp; 1303 struct vnode *a_vp; 1304 struct componentname *a_cnp; 1305 } */ *ap = v; 1306 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1307 int error; 1308 1309 PUFFS_VNREQ(rmdir); 1310 1311 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1312 puffs_makecn(&rmdir_arg.pvnr_cn, &rmdir_arg.pvnr_cn_cred, 1313 &rmdir_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1314 1315 error = puffs_vntouser(pmp, PUFFS_VN_RMDIR, 1316 &rmdir_arg, sizeof(rmdir_arg), 0, ap->a_dvp, ap->a_vp); 1317 1318 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1319 1320 vput(ap->a_dvp); 1321 vput(ap->a_vp); 1322 1323 return error; 1324 } 1325 1326 int 1327 puffs_link(void *v) 1328 { 1329 struct vop_link_args /* { 1330 const struct vnodeop_desc *a_desc; 1331 struct vnode *a_dvp; 1332 struct vnode *a_vp; 1333 struct componentname *a_cnp; 1334 }*/ *ap = v; 1335 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1336 int error; 1337 1338 PUFFS_VNREQ(link); 1339 1340 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1341 puffs_makecn(&link_arg.pvnr_cn, &link_arg.pvnr_cn_cred, 1342 &link_arg.pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1343 1344 error = puffs_vntouser(pmp, PUFFS_VN_LINK, 1345 &link_arg, sizeof(link_arg), 0, ap->a_dvp, ap->a_vp); 1346 1347 /* 1348 * XXX: stay in touch with the cache. I don't like this, but 1349 * don't have a better solution either. See also puffs_rename(). 1350 */ 1351 if (error == 0) 1352 puffs_updatenode(ap->a_vp, PUFFS_UPDATECTIME); 1353 1354 vput(ap->a_dvp); 1355 1356 return error; 1357 } 1358 1359 int 1360 puffs_symlink(void *v) 1361 { 1362 struct vop_symlink_args /* { 1363 const struct vnodeop_desc *a_desc; 1364 struct vnode *a_dvp; 1365 struct vnode **a_vpp; 1366 struct componentname *a_cnp; 1367 struct vattr *a_vap; 1368 char *a_target; 1369 }*/ *ap = v; 1370 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 1371 struct puffs_vnreq_symlink *symlink_argp; 1372 int error; 1373 1374 *ap->a_vpp = NULL; 1375 1376 symlink_argp = malloc(sizeof(struct puffs_vnreq_symlink), 1377 M_PUFFS, M_ZERO | M_WAITOK); 1378 puffs_makecn(&symlink_argp->pvnr_cn, &symlink_argp->pvnr_cn_cred, 1379 &symlink_argp->pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1380 symlink_argp->pvnr_va = *ap->a_vap; 1381 (void)strlcpy(symlink_argp->pvnr_link, ap->a_target, 1382 sizeof(symlink_argp->pvnr_link)); 1383 1384 error = puffs_vntouser(pmp, PUFFS_VN_SYMLINK, 1385 symlink_argp, sizeof(*symlink_argp), 0, ap->a_dvp, NULL); 1386 if (error) 1387 goto out; 1388 1389 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1390 symlink_argp->pvnr_newnode, ap->a_cnp, VLNK, 0); 1391 1392 out: 1393 free(symlink_argp, M_PUFFS); 1394 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1395 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1396 vput(ap->a_dvp); 1397 1398 return error; 1399 } 1400 1401 int 1402 puffs_readlink(void *v) 1403 { 1404 struct vop_readlink_args /* { 1405 const struct vnodeop_desc *a_desc; 1406 struct vnode *a_vp; 1407 struct uio *a_uio; 1408 kauth_cred_t a_cred; 1409 } */ *ap = v; 1410 size_t linklen; 1411 int error; 1412 1413 PUFFS_VNREQ(readlink); 1414 1415 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1416 linklen = sizeof(readlink_arg.pvnr_link); 1417 readlink_arg.pvnr_linklen = linklen; 1418 1419 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1420 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 0, 1421 ap->a_vp, NULL); 1422 if (error) 1423 return error; 1424 1425 /* bad bad user file server */ 1426 if (readlink_arg.pvnr_linklen > linklen) 1427 return EINVAL; 1428 1429 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1430 ap->a_uio); 1431 } 1432 1433 int 1434 puffs_rename(void *v) 1435 { 1436 struct vop_rename_args /* { 1437 const struct vnodeop_desc *a_desc; 1438 struct vnode *a_fdvp; 1439 struct vnode *a_fvp; 1440 struct componentname *a_fcnp; 1441 struct vnode *a_tdvp; 1442 struct vnode *a_tvp; 1443 struct componentname *a_tcnp; 1444 }*/ *ap = v; 1445 struct puffs_vnreq_rename *rename_argp = NULL; 1446 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_fdvp->v_mount); 1447 int error; 1448 1449 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) 1450 ERROUT(EXDEV); 1451 1452 rename_argp = malloc(sizeof(struct puffs_vnreq_rename), 1453 M_PUFFS, M_WAITOK | M_ZERO); 1454 1455 rename_argp->pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1456 rename_argp->pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1457 if (ap->a_tvp) 1458 rename_argp->pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1459 else 1460 rename_argp->pvnr_cookie_targ = NULL; 1461 puffs_makecn(&rename_argp->pvnr_cn_src, 1462 &rename_argp->pvnr_cn_src_cred, &rename_argp->pvnr_cn_src_cid, 1463 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1464 puffs_makecn(&rename_argp->pvnr_cn_targ, 1465 &rename_argp->pvnr_cn_targ_cred, &rename_argp->pvnr_cn_targ_cid, 1466 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1467 1468 error = puffs_vntouser(pmp, PUFFS_VN_RENAME, 1469 rename_argp, sizeof(*rename_argp), 0, ap->a_fdvp, NULL); /* XXX */ 1470 1471 /* 1472 * XXX: stay in touch with the cache. I don't like this, but 1473 * don't have a better solution either. See also puffs_link(). 1474 */ 1475 if (error == 0) 1476 puffs_updatenode(ap->a_fvp, PUFFS_UPDATECTIME); 1477 1478 out: 1479 if (rename_argp) 1480 free(rename_argp, M_PUFFS); 1481 if (ap->a_tvp != NULL) 1482 vput(ap->a_tvp); 1483 if (ap->a_tdvp == ap->a_tvp) 1484 vrele(ap->a_tdvp); 1485 else 1486 vput(ap->a_tdvp); 1487 1488 vrele(ap->a_fdvp); 1489 vrele(ap->a_fvp); 1490 1491 return error; 1492 } 1493 1494 #define RWARGS(cont, iofl, move, offset, creds) \ 1495 (cont)->pvnr_ioflag = (iofl); \ 1496 (cont)->pvnr_resid = (move); \ 1497 (cont)->pvnr_offset = (offset); \ 1498 puffs_credcvt(&(cont)->pvnr_cred, creds) 1499 1500 int 1501 puffs_read(void *v) 1502 { 1503 struct vop_read_args /* { 1504 const struct vnodeop_desc *a_desc; 1505 struct vnode *a_vp; 1506 struct uio *a_uio; 1507 int a_ioflag; 1508 kauth_cred_t a_cred; 1509 } */ *ap = v; 1510 struct puffs_vnreq_read *read_argp; 1511 struct puffs_mount *pmp; 1512 struct vnode *vp; 1513 struct uio *uio; 1514 void *win; 1515 size_t tomove, argsize; 1516 vsize_t bytelen; 1517 int error, ubcflags; 1518 1519 uio = ap->a_uio; 1520 vp = ap->a_vp; 1521 read_argp = NULL; 1522 error = 0; 1523 pmp = MPTOPUFFSMP(vp->v_mount); 1524 1525 /* std sanity */ 1526 if (uio->uio_resid == 0) 1527 return 0; 1528 if (uio->uio_offset < 0) 1529 return EINVAL; 1530 1531 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1532 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1533 1534 ubcflags = 0; 1535 if (UBC_WANT_UNMAP(vp)) 1536 ubcflags = UBC_UNMAP; 1537 1538 while (uio->uio_resid > 0) { 1539 bytelen = MIN(uio->uio_resid, 1540 vp->v_size - uio->uio_offset); 1541 if (bytelen == 0) 1542 break; 1543 1544 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1545 &bytelen, advice, UBC_READ); 1546 error = uiomove(win, bytelen, uio); 1547 ubc_release(win, ubcflags); 1548 if (error) 1549 break; 1550 } 1551 1552 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1553 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1554 } else { 1555 /* 1556 * in case it's not a regular file or we're operating 1557 * uncached, do read in the old-fashioned style, 1558 * i.e. explicit read operations 1559 */ 1560 1561 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1562 argsize = sizeof(struct puffs_vnreq_read); 1563 read_argp = malloc(argsize + tomove, 1564 M_PUFFS, M_WAITOK | M_ZERO); 1565 1566 error = 0; 1567 while (uio->uio_resid > 0) { 1568 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1569 RWARGS(read_argp, ap->a_ioflag, tomove, 1570 uio->uio_offset, ap->a_cred); 1571 1572 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1573 read_argp, argsize, tomove, 1574 ap->a_vp, NULL); 1575 if (error) 1576 break; 1577 1578 if (read_argp->pvnr_resid > tomove) { 1579 error = EINVAL; 1580 break; 1581 } 1582 1583 error = uiomove(read_argp->pvnr_data, 1584 tomove - read_argp->pvnr_resid, uio); 1585 1586 /* 1587 * in case the file is out of juice, resid from 1588 * userspace is != 0. and the error-case is 1589 * quite obvious 1590 */ 1591 if (error || read_argp->pvnr_resid) 1592 break; 1593 } 1594 } 1595 1596 if (read_argp) 1597 free(read_argp, M_PUFFS); 1598 return error; 1599 } 1600 1601 /* 1602 * XXX: in case of a failure, this leaves uio in a bad state. 1603 * We could theoretically copy the uio and iovecs and "replay" 1604 * them the right amount after the userspace trip, but don't 1605 * bother for now. 1606 */ 1607 int 1608 puffs_write(void *v) 1609 { 1610 struct vop_write_args /* { 1611 const struct vnodeop_desc *a_desc; 1612 struct vnode *a_vp; 1613 struct uio *a_uio; 1614 int a_ioflag; 1615 kauth_cred_t a_cred; 1616 } */ *ap = v; 1617 struct puffs_vnreq_write *write_argp; 1618 struct puffs_mount *pmp; 1619 struct uio *uio; 1620 struct vnode *vp; 1621 size_t tomove, argsize; 1622 off_t oldoff, newoff, origoff; 1623 vsize_t bytelen; 1624 int error, uflags; 1625 int ubcflags; 1626 1627 vp = ap->a_vp; 1628 uio = ap->a_uio; 1629 error = uflags = 0; 1630 write_argp = NULL; 1631 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1632 1633 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1634 ubcflags = UBC_WRITE | UBC_PARTIALOK; 1635 if (UBC_WANT_UNMAP(vp)) 1636 ubcflags = UBC_UNMAP; 1637 1638 /* 1639 * userspace *should* be allowed to control this, 1640 * but with UBC it's a bit unclear how to handle it 1641 */ 1642 if (ap->a_ioflag & IO_APPEND) 1643 uio->uio_offset = vp->v_size; 1644 1645 origoff = uio->uio_offset; 1646 while (uio->uio_resid > 0) { 1647 uflags |= PUFFS_UPDATECTIME; 1648 uflags |= PUFFS_UPDATEMTIME; 1649 oldoff = uio->uio_offset; 1650 bytelen = uio->uio_resid; 1651 1652 newoff = oldoff + bytelen; 1653 if (vp->v_size < newoff) { 1654 uvm_vnp_setwritesize(vp, newoff); 1655 } 1656 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1657 UVM_ADV_RANDOM, ubcflags); 1658 1659 /* 1660 * In case of a ubc_uiomove() error, 1661 * opt to not extend the file at all and 1662 * return an error. Otherwise, if we attempt 1663 * to clear the memory we couldn't fault to, 1664 * we might generate a kernel page fault. 1665 */ 1666 if (vp->v_size < newoff) { 1667 if (error == 0) { 1668 uflags |= PUFFS_UPDATESIZE; 1669 uvm_vnp_setsize(vp, newoff); 1670 } else { 1671 uvm_vnp_setwritesize(vp, vp->v_size); 1672 } 1673 } 1674 if (error) 1675 break; 1676 1677 /* 1678 * If we're writing large files, flush to file server 1679 * every 64k. Otherwise we can very easily exhaust 1680 * kernel and user memory, as the file server cannot 1681 * really keep up with our writing speed. 1682 * 1683 * Note: this does *NOT* honor MNT_ASYNC, because 1684 * that gives userland too much say in the kernel. 1685 */ 1686 if (oldoff >> 16 != uio->uio_offset >> 16) { 1687 simple_lock(&vp->v_interlock); 1688 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1689 uio->uio_offset & ~0xffff, 1690 PGO_CLEANIT | PGO_SYNCIO); 1691 if (error) 1692 break; 1693 } 1694 } 1695 1696 /* synchronous I/O? */ 1697 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1698 simple_lock(&vp->v_interlock); 1699 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1700 round_page(uio->uio_offset), 1701 PGO_CLEANIT | PGO_SYNCIO); 1702 1703 /* write though page cache? */ 1704 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1705 simple_lock(&vp->v_interlock); 1706 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1707 round_page(uio->uio_offset), PGO_CLEANIT); 1708 } 1709 1710 puffs_updatenode(vp, uflags); 1711 } else { 1712 /* tomove is non-increasing */ 1713 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1714 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1715 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1716 1717 while (uio->uio_resid > 0) { 1718 /* move data to buffer */ 1719 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1720 RWARGS(write_argp, ap->a_ioflag, tomove, 1721 uio->uio_offset, ap->a_cred); 1722 error = uiomove(write_argp->pvnr_data, tomove, uio); 1723 if (error) 1724 break; 1725 1726 /* move buffer to userspace */ 1727 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1728 PUFFS_VN_WRITE, write_argp, argsize, 0, 1729 ap->a_vp, NULL); 1730 if (error) 1731 break; 1732 1733 if (write_argp->pvnr_resid > tomove) { 1734 error = EINVAL; 1735 break; 1736 } 1737 1738 /* adjust file size */ 1739 if (vp->v_size < uio->uio_offset) 1740 uvm_vnp_setsize(vp, uio->uio_offset); 1741 1742 /* didn't move everything? bad userspace. bail */ 1743 if (write_argp->pvnr_resid != 0) { 1744 error = EIO; 1745 break; 1746 } 1747 } 1748 } 1749 1750 if (write_argp) 1751 free(write_argp, M_PUFFS); 1752 return error; 1753 } 1754 1755 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1756 1757 #define FCNIOCTL_ARG_MAX 1<<16 1758 int 1759 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1760 { 1761 1762 /* currently not supported */ 1763 return EOPNOTSUPP; 1764 #if 0 1765 /* struct vop_ioctl_args { 1766 const struct vnodeop_desc *a_desc; 1767 struct vnode *a_vp; 1768 u_long a_command; 1769 void *a_data; 1770 int a_fflag; 1771 kauth_cred_t a_cred; 1772 struct lwp *a_l; 1773 }*ap = v; */ 1774 struct puffs_mount *pmp; 1775 struct puffs_sizepark pspark; 1776 void *kernbuf; 1777 size_t copylen; 1778 int error; 1779 1780 PUFFS_VNREQ(fcnioctl); 1781 1782 /* 1783 * Since this op gives the filesystem (almost) complete control on 1784 * how much it is allowed to copy from the calling process 1785 * address space, do not enable it by default, since it would 1786 * be a whopping security hole. 1787 */ 1788 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1789 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1790 return EINVAL; /* only shoe that fits */ 1791 1792 /* fill in sizereq and store it */ 1793 pspark.pkso_reqid = puffs_getreqid(pmp); 1794 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1795 pspark.pkso_copybuf = ap->a_data; 1796 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1797 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1798 1799 /* then fill in actual request and shoot it off */ 1800 fcnioctl_arg.pvnr_command = ap->a_command; 1801 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1802 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1803 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1804 1805 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1806 &fcnioctl_arg, sizeof(fcnioctl_arg), 0, ap->a_vp, 1807 pspark.pkso_reqid, ap->a_vp, NULL); 1808 1809 /* if we don't need to copy data, we're done */ 1810 if (error || !fcnioctl_arg.pvnr_copyback) 1811 return error; 1812 1813 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1814 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1815 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1816 if (error) 1817 goto out; 1818 error = copyout(kernbuf, ap->a_data, copylen); 1819 1820 out: 1821 free(kernbuf, M_PUFFS); 1822 return error; 1823 #endif 1824 } 1825 1826 int 1827 puffs_ioctl(void *v) 1828 { 1829 1830 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1831 } 1832 1833 int 1834 puffs_fcntl(void *v) 1835 { 1836 1837 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1838 } 1839 1840 int 1841 puffs_print(void *v) 1842 { 1843 struct vop_print_args /* { 1844 struct vnode *a_vp; 1845 } */ *ap = v; 1846 struct puffs_mount *pmp; 1847 struct vnode *vp = ap->a_vp; 1848 struct puffs_node *pn = vp->v_data; 1849 1850 PUFFS_VNREQ(print); 1851 1852 pmp = MPTOPUFFSMP(vp->v_mount); 1853 1854 /* kernel portion */ 1855 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1856 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1857 if (vp->v_type == VFIFO) 1858 fifo_printinfo(vp); 1859 lockmgr_printinfo(&vp->v_lock); 1860 1861 /* userspace portion */ 1862 if (EXISTSOP(pmp, PRINT)) 1863 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1864 &print_arg, sizeof(print_arg), 0, ap->a_vp, NULL); 1865 1866 return 0; 1867 } 1868 1869 int 1870 puffs_pathconf(void *v) 1871 { 1872 struct vop_pathconf_args /* { 1873 const struct vnodeop_desc *a_desc; 1874 struct vnode *a_vp; 1875 int a_name; 1876 register_t *a_retval; 1877 } */ *ap = v; 1878 int error; 1879 1880 PUFFS_VNREQ(pathconf); 1881 1882 pathconf_arg.pvnr_name = ap->a_name; 1883 1884 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1885 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 0, 1886 ap->a_vp, NULL); 1887 if (error) 1888 return error; 1889 1890 *ap->a_retval = pathconf_arg.pvnr_retval; 1891 1892 return 0; 1893 } 1894 1895 int 1896 puffs_advlock(void *v) 1897 { 1898 struct vop_advlock_args /* { 1899 const struct vnodeop_desc *a_desc; 1900 struct vnode *a_vp; 1901 void *a_id; 1902 int a_op; 1903 struct flock *a_fl; 1904 int a_flags; 1905 } */ *ap = v; 1906 int error; 1907 1908 PUFFS_VNREQ(advlock); 1909 1910 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1911 if (error) 1912 return error; 1913 advlock_arg.pvnr_id = ap->a_id; 1914 advlock_arg.pvnr_op = ap->a_op; 1915 advlock_arg.pvnr_flags = ap->a_flags; 1916 1917 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1918 &advlock_arg, sizeof(advlock_arg), 0, ap->a_vp, NULL); 1919 } 1920 1921 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 1922 #define BIOREAD(bp) (bp->b_flags & B_READ) 1923 #define BIOWRITE(bp) ((bp->b_flags & B_READ) == 0) 1924 1925 /* 1926 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1927 */ 1928 int 1929 puffs_strategy(void *v) 1930 { 1931 struct vop_strategy_args /* { 1932 const struct vnodeop_desc *a_desc; 1933 struct vnode *a_vp; 1934 struct buf *a_bp; 1935 } */ *ap = v; 1936 struct puffs_mount *pmp; 1937 struct vnode *vp = ap->a_vp; 1938 struct puffs_node *pn; 1939 struct puffs_vnreq_readwrite *rw_argp = NULL; 1940 struct buf *bp; 1941 size_t argsize; 1942 size_t tomove, moved; 1943 int error, dofaf; 1944 1945 pmp = MPTOPUFFSMP(vp->v_mount); 1946 bp = ap->a_bp; 1947 error = 0; 1948 dofaf = 0; 1949 pn = VPTOPP(vp); 1950 1951 if ((BIOREAD(bp) && !EXISTSOP(pmp, READ)) 1952 || (BIOWRITE(bp) && !EXISTSOP(pmp, WRITE))) 1953 ERROUT(EOPNOTSUPP); 1954 1955 /* 1956 * Short-circuit optimization: don't flush buffer in between 1957 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 1958 */ 1959 if (pn->pn_stat & PNODE_DYING) { 1960 KASSERT(BIOWRITE(bp)); 1961 bp->b_resid = 0; 1962 goto out; 1963 } 1964 1965 #ifdef DIAGNOSTIC 1966 if (bp->b_bcount > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1967 panic("puffs_strategy: wildly inappropriate buf bcount %d", 1968 bp->b_bcount); 1969 #endif 1970 1971 /* 1972 * See explanation for the necessity of a FAF in puffs_fsync. 1973 * 1974 * Also, do FAF in case we're suspending. 1975 * See puffs_vfsops.c:pageflush() 1976 */ 1977 if (BIOWRITE(bp)) { 1978 simple_lock(&vp->v_interlock); 1979 if (vp->v_flag & VXLOCK) 1980 dofaf = 1; 1981 if (pn->pn_stat & PNODE_SUSPEND) 1982 dofaf = 1; 1983 simple_unlock(&vp->v_interlock); 1984 } 1985 1986 if (BIOASYNC(bp)) 1987 dofaf = 1; 1988 1989 #ifdef DIAGNOSTIC 1990 if (curlwp == uvm.pagedaemon_lwp) 1991 KASSERT(dofaf); 1992 #endif 1993 1994 /* allocate transport structure */ 1995 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 1996 argsize = sizeof(struct puffs_vnreq_readwrite); 1997 rw_argp = malloc(argsize + tomove, M_PUFFS, 1998 M_ZERO | (dofaf ? M_NOWAIT : M_WAITOK)); 1999 if (rw_argp == NULL) 2000 ERROUT(ENOMEM); 2001 RWARGS(rw_argp, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2002 2003 /* 2x2 cases: read/write, faf/nofaf */ 2004 if (BIOREAD(bp)) { 2005 if (dofaf) { 2006 puffs_vntouser_call(pmp, PUFFS_VN_READ, rw_argp, 2007 argsize, tomove, puffs_parkdone_asyncbioread, 2008 bp, vp, NULL); 2009 } else { 2010 error = puffs_vntouser(pmp, PUFFS_VN_READ, 2011 rw_argp, argsize, tomove, vp, NULL); 2012 if (error) 2013 goto out; 2014 2015 if (rw_argp->pvnr_resid > tomove) 2016 ERROUT(EINVAL); 2017 2018 moved = tomove - rw_argp->pvnr_resid; 2019 2020 (void)memcpy(bp->b_data, rw_argp->pvnr_data, moved); 2021 bp->b_resid = bp->b_bcount - moved; 2022 } 2023 } else { 2024 /* 2025 * make pages read-only before we write them if we want 2026 * write caching info 2027 */ 2028 if (PUFFS_WCACHEINFO(pmp)) { 2029 struct uvm_object *uobj = &vp->v_uobj; 2030 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2031 struct vm_page *vmp; 2032 int i; 2033 2034 for (i = 0; i < npages; i++) { 2035 vmp= uvm_pageratop((vaddr_t)bp->b_data 2036 + (i << PAGE_SHIFT)); 2037 DPRINTF(("puffs_strategy: write-protecting " 2038 "vp %p page %p, offset %" PRId64"\n", 2039 vp, vmp, vmp->offset)); 2040 simple_lock(&uobj->vmobjlock); 2041 vmp->flags |= PG_RDONLY; 2042 pmap_page_protect(vmp, VM_PROT_READ); 2043 simple_unlock(&uobj->vmobjlock); 2044 } 2045 } 2046 2047 (void)memcpy(&rw_argp->pvnr_data, bp->b_data, tomove); 2048 if (dofaf) { 2049 /* 2050 * assume FAF moves everything. frankly, we don't 2051 * really have a choice. 2052 */ 2053 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 2054 PUFFS_VN_WRITE, rw_argp, argsize + tomove, vp); 2055 bp->b_resid = bp->b_bcount - tomove; 2056 } else { 2057 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 2058 PUFFS_VN_WRITE, rw_argp, argsize + tomove, 2059 0, vp, NULL); 2060 if (error) 2061 goto out; 2062 2063 moved = tomove - rw_argp->pvnr_resid; 2064 if (rw_argp->pvnr_resid > tomove) 2065 ERROUT(EINVAL); 2066 2067 bp->b_resid = bp->b_bcount - moved; 2068 if (rw_argp->pvnr_resid != 0) 2069 ERROUT(EIO); 2070 } 2071 } 2072 2073 out: 2074 KASSERT(dofaf == 0 || error == 0 || rw_argp == NULL); 2075 if (rw_argp && !dofaf) 2076 free(rw_argp, M_PUFFS); 2077 2078 if (error) { 2079 bp->b_error = error; 2080 bp->b_flags |= B_ERROR; 2081 } 2082 2083 if (error || !(BIOREAD(bp) && BIOASYNC(bp))) 2084 biodone(bp); 2085 2086 return error; 2087 } 2088 2089 int 2090 puffs_mmap(void *v) 2091 { 2092 struct vop_mmap_args /* { 2093 const struct vnodeop_desc *a_desc; 2094 struct vnode *a_vp; 2095 vm_prot_t a_prot; 2096 kauth_cred_t a_cred; 2097 struct lwp *a_l; 2098 } */ *ap = v; 2099 struct puffs_mount *pmp; 2100 int error; 2101 2102 PUFFS_VNREQ(mmap); 2103 2104 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2105 2106 if (!PUFFS_USE_PAGECACHE(pmp)) 2107 return genfs_eopnotsupp(v); 2108 2109 if (EXISTSOP(pmp, MMAP)) { 2110 mmap_arg.pvnr_prot = ap->a_prot; 2111 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 2112 puffs_cidcvt(&mmap_arg.pvnr_cid, ap->a_l); 2113 2114 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 2115 &mmap_arg, sizeof(mmap_arg), 0, 2116 ap->a_vp, NULL); 2117 } else { 2118 error = genfs_mmap(v); 2119 } 2120 2121 return error; 2122 } 2123 2124 2125 /* 2126 * The rest don't get a free trip to userspace and back, they 2127 * have to stay within the kernel. 2128 */ 2129 2130 /* 2131 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2132 * well, maybe somehow, somewhere, some day .... 2133 */ 2134 int 2135 puffs_bmap(void *v) 2136 { 2137 struct vop_bmap_args /* { 2138 const struct vnodeop_desc *a_desc; 2139 struct vnode *a_vp; 2140 daddr_t a_bn; 2141 struct vnode **a_vpp; 2142 daddr_t *a_bnp; 2143 int *a_runp; 2144 } */ *ap = v; 2145 struct puffs_mount *pmp; 2146 2147 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2148 2149 if (ap->a_vpp) 2150 *ap->a_vpp = ap->a_vp; 2151 if (ap->a_bnp) 2152 *ap->a_bnp = ap->a_bn; 2153 if (ap->a_runp) 2154 *ap->a_runp 2155 = (PUFFS_TOMOVE(pmp->pmp_req_maxsize, pmp)>>DEV_BSHIFT) - 1; 2156 2157 return 0; 2158 } 2159 2160 /* 2161 * Handle getpages faults in puffs. We let genfs_getpages() do most 2162 * of the dirty work, but we come in this route to do accounting tasks. 2163 * If the user server has specified functions for cache notifications 2164 * about reads and/or writes, we record which type of operation we got, 2165 * for which page range, and proceed to issue a FAF notification to the 2166 * server about it. 2167 */ 2168 int 2169 puffs_getpages(void *v) 2170 { 2171 struct vop_getpages_args /* { 2172 const struct vnodeop_desc *a_desc; 2173 struct vnode *a_vp; 2174 voff_t a_offset; 2175 struct vm_page **a_m; 2176 int *a_count; 2177 int a_centeridx; 2178 vm_prot_t a_access_type; 2179 int a_advice; 2180 int a_flags; 2181 } */ *ap = v; 2182 struct puffs_mount *pmp; 2183 struct puffs_node *pn; 2184 struct vnode *vp; 2185 struct vm_page **pgs; 2186 struct puffs_cacheinfo *pcinfo = NULL; 2187 struct puffs_cacherun *pcrun; 2188 void *parkmem = NULL; 2189 size_t runsizes; 2190 int i, npages, si, streakon; 2191 int error, locked, write; 2192 2193 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2194 npages = *ap->a_count; 2195 pgs = ap->a_m; 2196 vp = ap->a_vp; 2197 pn = vp->v_data; 2198 locked = (ap->a_flags & PGO_LOCKED) != 0; 2199 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2200 2201 /* ccg xnaht - gets Wuninitialized wrong */ 2202 pcrun = NULL; 2203 runsizes = 0; 2204 2205 /* 2206 * Check that we aren't trying to fault in pages which our file 2207 * server doesn't know about. This happens if we extend a file by 2208 * skipping some pages and later try to fault in pages which 2209 * are between pn_serversize and vp_size. This check optimizes 2210 * away the common case where a file is being extended. 2211 */ 2212 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2213 struct vattr va; 2214 2215 /* try again later when we can block */ 2216 if (locked) 2217 ERROUT(EBUSY); 2218 2219 simple_unlock(&vp->v_interlock); 2220 vattr_null(&va); 2221 va.va_size = vp->v_size; 2222 error = puffs_dosetattr(vp, &va, FSCRED, NULL, 0); 2223 if (error) 2224 ERROUT(error); 2225 simple_lock(&vp->v_interlock); 2226 } 2227 2228 if (write && PUFFS_WCACHEINFO(pmp)) { 2229 /* allocate worst-case memory */ 2230 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2231 pcinfo = malloc(sizeof(struct puffs_cacheinfo) + runsizes, 2232 M_PUFFS, M_ZERO | locked ? M_NOWAIT : M_WAITOK); 2233 2234 /* 2235 * can't block if we're locked and can't mess up caching 2236 * information for fs server. so come back later, please 2237 */ 2238 if (pcinfo == NULL) 2239 ERROUT(ENOMEM); 2240 2241 parkmem = puffs_park_alloc(locked == 0); 2242 if (parkmem == NULL) 2243 ERROUT(ENOMEM); 2244 2245 pcrun = pcinfo->pcache_runs; 2246 } 2247 2248 error = genfs_getpages(v); 2249 if (error) 2250 goto out; 2251 2252 if (PUFFS_WCACHEINFO(pmp) == 0) 2253 goto out; 2254 2255 /* 2256 * Let's see whose fault it was and inform the user server of 2257 * possibly read/written pages. Map pages from read faults 2258 * strictly read-only, since otherwise we might miss info on 2259 * when the page is actually write-faulted to. 2260 */ 2261 if (!locked) 2262 simple_lock(&vp->v_uobj.vmobjlock); 2263 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2264 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2265 if (streakon && write) { 2266 streakon = 0; 2267 pcrun[si].pcache_runend 2268 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2269 si++; 2270 } 2271 continue; 2272 } 2273 if (streakon == 0 && write) { 2274 streakon = 1; 2275 pcrun[si].pcache_runstart = pgs[i]->offset; 2276 } 2277 2278 if (!write) 2279 pgs[i]->flags |= PG_RDONLY; 2280 } 2281 /* was the last page part of our streak? */ 2282 if (streakon) { 2283 pcrun[si].pcache_runend 2284 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2285 si++; 2286 } 2287 if (!locked) 2288 simple_unlock(&vp->v_uobj.vmobjlock); 2289 2290 KASSERT(si <= (npages / 2) + 1); 2291 2292 /* send results to userspace */ 2293 if (write) 2294 puffs_cacheop(pmp, parkmem, pcinfo, 2295 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2296 2297 out: 2298 if (error) { 2299 if (pcinfo != NULL) 2300 free(pcinfo, M_PUFFS); 2301 if (parkmem != NULL) 2302 puffs_park_release(parkmem, 1); 2303 } 2304 2305 return error; 2306 } 2307 2308 int 2309 puffs_lock(void *v) 2310 { 2311 struct vop_lock_args /* { 2312 struct vnode *a_vp; 2313 int a_flags; 2314 }*/ *ap = v; 2315 struct vnode *vp = ap->a_vp; 2316 struct mount *mp = vp->v_mount; 2317 2318 #if 0 2319 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2320 #endif 2321 2322 /* 2323 * XXX: this avoids deadlocking when we're suspending. 2324 * e.g. some ops holding the vnode lock might be blocked for 2325 * the vfs transaction lock so we'd deadlock. 2326 * 2327 * Now once again this is skating on the thin ice of modern life, 2328 * since we are breaking the consistency guarantee provided 2329 * _to the user server_ by vnode locking. Hopefully this will 2330 * get fixed soon enough by getting rid of the dependency on 2331 * vnode locks alltogether. 2332 */ 2333 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2334 if (ap->a_flags & LK_INTERLOCK) 2335 simple_unlock(&vp->v_interlock); 2336 return 0; 2337 } 2338 2339 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2340 } 2341 2342 int 2343 puffs_unlock(void *v) 2344 { 2345 struct vop_unlock_args /* { 2346 struct vnode *a_vp; 2347 int a_flags; 2348 } */ *ap = v; 2349 struct vnode *vp = ap->a_vp; 2350 struct mount *mp = vp->v_mount; 2351 2352 #if 0 2353 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2354 #endif 2355 2356 /* XXX: see puffs_lock() */ 2357 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2358 if (ap->a_flags & LK_INTERLOCK) 2359 simple_unlock(&vp->v_interlock); 2360 return 0; 2361 } 2362 2363 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2364 } 2365 2366 int 2367 puffs_islocked(void *v) 2368 { 2369 struct vop_islocked_args *ap = v; 2370 int rv; 2371 2372 rv = lockstatus(&ap->a_vp->v_lock); 2373 return rv; 2374 } 2375 2376 int 2377 puffs_generic(void *v) 2378 { 2379 struct vop_generic_args *ap = v; 2380 2381 (void)ap; 2382 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2383 2384 return EOPNOTSUPP; 2385 } 2386 2387 2388 /* 2389 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2390 * FAF update information for the puffs node first. 2391 */ 2392 int 2393 puffs_spec_read(void *v) 2394 { 2395 struct vop_read_args /* { 2396 const struct vnodeop_desc *a_desc; 2397 struct vnode *a_vp; 2398 struct uio *a_uio; 2399 int a_ioflag; 2400 kauth_cred_t a_cred; 2401 } */ *ap = v; 2402 2403 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2404 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2405 } 2406 2407 int 2408 puffs_spec_write(void *v) 2409 { 2410 struct vop_write_args /* { 2411 const struct vnodeop_desc *a_desc; 2412 struct vnode *a_vp; 2413 struct uio *a_uio; 2414 int a_ioflag; 2415 kauth_cred_t a_cred; 2416 }*/ *ap = v; 2417 2418 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2419 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2420 } 2421 2422 int 2423 puffs_fifo_read(void *v) 2424 { 2425 struct vop_read_args /* { 2426 const struct vnodeop_desc *a_desc; 2427 struct vnode *a_vp; 2428 struct uio *a_uio; 2429 int a_ioflag; 2430 kauth_cred_t a_cred; 2431 } */ *ap = v; 2432 2433 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2434 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2435 } 2436 2437 int 2438 puffs_fifo_write(void *v) 2439 { 2440 struct vop_write_args /* { 2441 const struct vnodeop_desc *a_desc; 2442 struct vnode *a_vp; 2443 struct uio *a_uio; 2444 int a_ioflag; 2445 kauth_cred_t a_cred; 2446 }*/ *ap = v; 2447 2448 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2449 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2450 } 2451
Indexes created Mon Sep 29 21:09:56 GMT 2025