puffs_vnops.c revision 1.11
1 /* $NetBSD: puffs_vnops.c,v 1.11 2006/11/17 17:48:02 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006 Antti Kantee. All Rights Reserved. 5 * 6 * Development of this software was supported by the 7 * Google Summer of Code program and the Ulla Tuominen Foundation. 8 * The Google SoC project was mentored by Bill Studenmund. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the company nor the name of the author may be used to 19 * endorse or promote products derived from this software without specific 20 * prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 23 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 25 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.11 2006/11/17 17:48:02 pooka Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/vnode.h> 40 #include <sys/mount.h> 41 #include <sys/malloc.h> 42 #include <sys/namei.h> 43 44 #include <fs/puffs/puffs_msgif.h> 45 #include <fs/puffs/puffs_sys.h> 46 47 #include <miscfs/fifofs/fifo.h> 48 #include <miscfs/genfs/genfs.h> 49 #include <miscfs/specfs/specdev.h> 50 51 int puffs_lookup(void *); 52 int puffs_create(void *); 53 int puffs_access(void *); 54 int puffs_mknod(void *); 55 int puffs_open(void *); 56 int puffs_close(void *); 57 int puffs_getattr(void *); 58 int puffs_setattr(void *); 59 int puffs_revoke(void *); 60 int puffs_reclaim(void *); 61 int puffs_readdir(void *); 62 int puffs_poll(void *); 63 int puffs_fsync(void *); 64 int puffs_seek(void *); 65 int puffs_remove(void *); 66 int puffs_mkdir(void *); 67 int puffs_rmdir(void *); 68 int puffs_link(void *); 69 int puffs_readlink(void *); 70 int puffs_symlink(void *); 71 int puffs_rename(void *); 72 int puffs_read(void *); 73 int puffs_write(void *); 74 int puffs_fcntl(void *); 75 int puffs_ioctl(void *); 76 int puffs_inactive(void *); 77 int puffs_print(void *); 78 int puffs_pathconf(void *); 79 int puffs_advlock(void *); 80 int puffs_strategy(void *); 81 int puffs_bmap(void *); 82 83 84 /* VOP_LEASE() not included */ 85 86 int puffs_generic(void *); 87 88 #if 0 89 #define puffs_lock genfs_lock 90 #define puffs_unlock genfs_unlock 91 #define puffs_islocked genfs_islocked 92 #else 93 int puffs_lock(void *); 94 int puffs_unlock(void *); 95 int puffs_islocked(void *); 96 #endif 97 98 /* 99 * no special specops for now. hmm, probably don't want to handle 100 * these synchronously, since they don't actually demand any 101 * response. so maybe we need another touser-type thing... 102 */ 103 #define puffsspec_read spec_read 104 #define puffsspec_write spec_write 105 #define puffsspec_close spec_close 106 /* no special fifo-ooops either */ 107 #define puffsfifo_read fifo_read 108 #define puffsfifo_write fifo_write 109 #define puffsfifo_close fifo_close 110 111 int (**puffs_vnodeop_p)(void *); 112 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 113 { &vop_default_desc, vn_default_error }, 114 { &vop_lookup_desc, puffs_lookup }, /* lookup */ 115 { &vop_create_desc, puffs_create }, /* create */ 116 { &vop_mknod_desc, puffs_mknod }, /* mknod */ 117 { &vop_open_desc, puffs_open }, /* open */ 118 { &vop_close_desc, puffs_close }, /* close */ 119 { &vop_access_desc, puffs_access }, /* access */ 120 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 121 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 122 { &vop_read_desc, puffs_read }, /* read */ 123 { &vop_write_desc, puffs_write }, /* write */ 124 { &vop_fcntl_desc, puffs_fcntl }, /* fcntl */ 125 { &vop_ioctl_desc, puffs_ioctl }, /* ioctl */ 126 { &vop_revoke_desc, puffs_revoke }, /* revoke */ 127 { &vop_fsync_desc, puffs_fsync }, /* fsync */ 128 { &vop_seek_desc, puffs_seek }, /* seek */ 129 { &vop_remove_desc, puffs_remove }, /* remove */ 130 { &vop_link_desc, puffs_link }, /* link */ 131 { &vop_rename_desc, puffs_rename }, /* rename */ 132 { &vop_mkdir_desc, puffs_mkdir }, /* mkdir */ 133 { &vop_rmdir_desc, puffs_rmdir }, /* rmdir */ 134 { &vop_symlink_desc, puffs_symlink }, /* symlink */ 135 { &vop_readdir_desc, puffs_readdir }, /* readdir */ 136 { &vop_readlink_desc, puffs_readlink }, /* readlink */ 137 { &vop_abortop_desc, genfs_abortop }, /* abortop */ 138 { &vop_inactive_desc, puffs_inactive }, /* inactive */ 139 { &vop_reclaim_desc, puffs_reclaim }, /* reclaim */ 140 { &vop_lock_desc, puffs_lock }, /* lock */ 141 { &vop_unlock_desc, puffs_unlock }, /* unlock */ 142 { &vop_bmap_desc, puffs_bmap }, /* bmap */ 143 { &vop_strategy_desc, puffs_strategy }, /* strategy */ 144 { &vop_print_desc, puffs_print }, /* print */ 145 { &vop_islocked_desc, puffs_islocked }, /* islocked */ 146 { &vop_pathconf_desc, puffs_pathconf }, /* pathconf */ 147 { &vop_advlock_desc, puffs_advlock }, /* advlock */ 148 { &vop_bwrite_desc, genfs_nullop }, /* bwrite */ 149 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 150 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 151 { &vop_mmap_desc, genfs_mmap }, /* mmap */ 152 153 { &vop_poll_desc, genfs_eopnotsupp }, /* poll XXX */ 154 { &vop_poll_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 155 { NULL, NULL } 156 }; 157 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 158 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 159 160 161 int (**puffs_specop_p)(void *); 162 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 163 { &vop_default_desc, vn_default_error }, 164 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 165 { &vop_create_desc, spec_create }, /* genfs_badop */ 166 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 167 { &vop_open_desc, spec_open }, /* spec_open */ 168 { &vop_close_desc, puffsspec_close }, /* close */ 169 { &vop_access_desc, puffs_access }, /* access */ 170 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 171 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 172 { &vop_read_desc, puffsspec_read }, /* read */ 173 { &vop_write_desc, puffsspec_write }, /* write */ 174 { &vop_lease_desc, spec_lease_check }, /* genfs_nullop */ 175 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 176 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 177 { &vop_poll_desc, spec_poll }, /* spec_poll */ 178 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 179 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 180 { &vop_mmap_desc, spec_mmap }, /* genfs_mmap (dummy) */ 181 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 182 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 183 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 184 { &vop_link_desc, spec_link }, /* genfs_badop */ 185 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 186 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 187 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 188 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 189 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 190 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 191 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 192 { &vop_inactive_desc, puffs_inactive }, /* inactive */ 193 { &vop_reclaim_desc, puffs_reclaim }, /* reclaim */ 194 { &vop_lock_desc, puffs_lock }, /* lock */ 195 { &vop_unlock_desc, puffs_unlock }, /* unlock */ 196 { &vop_bmap_desc, spec_bmap }, /* dummy */ 197 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 198 { &vop_print_desc, puffs_print }, /* print */ 199 { &vop_islocked_desc, puffs_islocked }, /* islocked */ 200 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 201 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 202 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 203 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 204 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 205 #if 0 206 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 207 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 208 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 209 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 210 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 211 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 212 #endif 213 { NULL, NULL } 214 }; 215 const struct vnodeopv_desc puffs_specop_opv_desc = 216 { &puffs_specop_p, puffs_specop_entries }; 217 218 int (**puffs_fifoop_p)(void *); 219 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 220 { &vop_default_desc, vn_default_error }, 221 { &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */ 222 { &vop_create_desc, fifo_create }, /* genfs_badop */ 223 { &vop_mknod_desc, fifo_mknod }, /* genfs_badop */ 224 { &vop_open_desc, fifo_open }, /* open */ 225 { &vop_close_desc, puffsfifo_close }, /* close */ 226 { &vop_access_desc, puffs_access }, /* access */ 227 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 228 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 229 { &vop_read_desc, puffsfifo_read }, /* read */ 230 { &vop_write_desc, puffsfifo_write }, /* write */ 231 { &vop_lease_desc, fifo_lease_check }, /* genfs_nullop */ 232 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 233 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 234 { &vop_poll_desc, fifo_poll }, /* poll */ 235 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 236 { &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */ 237 { &vop_mmap_desc, fifo_mmap }, /* genfs_badop */ 238 { &vop_fsync_desc, puffs_fsync }, /* fsync */ 239 { &vop_seek_desc, fifo_seek }, /* genfs_badop */ 240 { &vop_remove_desc, fifo_remove }, /* genfs_badop */ 241 { &vop_link_desc, fifo_link }, /* genfs_badop */ 242 { &vop_rename_desc, fifo_rename }, /* genfs_badop */ 243 { &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */ 244 { &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */ 245 { &vop_symlink_desc, fifo_symlink }, /* genfs_badop */ 246 { &vop_readdir_desc, fifo_readdir }, /* genfs_badop */ 247 { &vop_readlink_desc, fifo_readlink }, /* genfs_badop */ 248 { &vop_abortop_desc, fifo_abortop }, /* genfs_badop */ 249 { &vop_inactive_desc, puffs_inactive }, /* inactive */ 250 { &vop_reclaim_desc, puffs_reclaim }, /* reclaim */ 251 { &vop_lock_desc, puffs_lock }, /* lock */ 252 { &vop_unlock_desc, puffs_unlock }, /* unlock */ 253 { &vop_bmap_desc, fifo_bmap }, /* dummy */ 254 { &vop_strategy_desc, fifo_strategy }, /* genfs_badop */ 255 { &vop_print_desc, puffs_print }, /* print */ 256 { &vop_islocked_desc, puffs_islocked }, /* islocked */ 257 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 258 { &vop_advlock_desc, fifo_advlock }, /* genfs_einval */ 259 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 260 { &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/ 261 #if 0 262 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 263 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 264 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 265 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 266 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 267 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 268 #endif 269 { NULL, NULL } 270 }; 271 const struct vnodeopv_desc puffs_fifoop_opv_desc = 272 { &puffs_fifoop_p, puffs_fifoop_entries }; 273 274 275 276 #define LOCKEDVP(a) (VOP_ISLOCKED(a) ? (a) : NULL) 277 278 279 int 280 puffs_lookup(void *v) 281 { 282 struct vop_lookup_args /* { 283 struct vnode * a_dvp; 284 struct vnode ** a_vpp; 285 struct componentname * a_cnp; 286 } */ *ap = v; 287 struct puffs_mount *pmp; 288 struct componentname *cnp; 289 struct vnode *vp, *dvp; 290 int wantpunlock, isdot; 291 int error; 292 293 PUFFS_VNREQ(lookup); 294 295 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 296 cnp = ap->a_cnp; 297 dvp = ap->a_dvp; 298 *ap->a_vpp = NULL; 299 300 /* first things first: check access */ 301 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 302 if (error) 303 return error; 304 305 wantpunlock = ~cnp->cn_flags & (LOCKPARENT | ISLASTCN); 306 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 307 308 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %lx\n", 309 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 310 311 /* 312 * Do sanity checks we can do without consulting userland. 313 */ 314 315 /* 316 * last component check & ro fs 317 * 318 * hmmm... why doesn't this check for create? 319 */ 320 if ((cnp->cn_flags & ISLASTCN) 321 && (ap->a_dvp->v_mount->mnt_flag & MNT_RDONLY) 322 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) { 323 DPRINTF(("puffs_lookup: write lookup for read-only fs!\n")); 324 return EROFS; 325 } 326 327 /* 328 * Check if someone fed it into the cache 329 */ 330 error = cache_lookup(dvp, ap->a_vpp, cnp); 331 if (error >= 0) 332 return error; 333 334 if (isdot) { 335 vp = ap->a_dvp; 336 vref(vp); 337 *ap->a_vpp = vp; 338 return 0; 339 } 340 341 puffs_makecn(&lookup_arg.pvnr_cn, cnp); 342 343 if (cnp->cn_flags & ISDOTDOT) 344 VOP_UNLOCK(dvp, 0); 345 346 error = puffs_vntouser(pmp, PUFFS_VN_LOOKUP, 347 &lookup_arg, sizeof(lookup_arg), VPTOPNC(dvp), LOCKEDVP(dvp), NULL); 348 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 349 350 /* 351 * In case of error, leave parent locked. There is no new 352 * vnode to play with, so be happy with the NULL value given 353 * to vpp in the beginning. 354 */ 355 if (error) { 356 if (error == ENOENT) { 357 if ((cnp->cn_flags & ISLASTCN) 358 && (cnp->cn_nameiop == CREATE 359 || cnp->cn_nameiop == RENAME)) { 360 cnp->cn_flags |= SAVENAME; 361 error = EJUSTRETURN; 362 } 363 } 364 *ap->a_vpp = NULL; 365 if (cnp->cn_flags & ISDOTDOT) 366 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) != 0) 367 cnp->cn_flags |= PDIRUNLOCK; 368 return error; 369 } 370 371 vp = puffs_pnode2vnode(pmp, lookup_arg.pvnr_newnode); 372 if (!vp) { 373 error = puffs_getvnode(dvp->v_mount, 374 lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype, 375 lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp); 376 if (error) { 377 if (cnp->cn_flags & ISDOTDOT) 378 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) != 0) 379 cnp->cn_flags |= PDIRUNLOCK; 380 return error; 381 } 382 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 383 } 384 385 if (cnp->cn_flags & ISDOTDOT) { 386 if (cnp->cn_flags & LOCKPARENT && 387 cnp->cn_flags & ISLASTCN) { 388 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) != 0) { 389 cnp->cn_flags |= PDIRUNLOCK; 390 } 391 } 392 } else { 393 if (wantpunlock) { 394 VOP_UNLOCK(dvp, 0); 395 cnp->cn_flags |= PDIRUNLOCK; 396 } 397 } 398 399 if (cnp->cn_flags & MAKEENTRY) 400 cache_enter(dvp, vp, cnp); 401 *ap->a_vpp = vp; 402 403 return 0; 404 } 405 406 int 407 puffs_create(void *v) 408 { 409 struct vop_create_args /* { 410 const struct vnodeop_desc *a_desc; 411 struct vnode *a_dvp; 412 struct vnode **a_vpp; 413 struct componentname *a_cnp; 414 struct vattr *a_vap; 415 } */ *ap = v; 416 int error; 417 418 PUFFS_VNREQ(create); 419 420 puffs_makecn(&create_arg.pvnr_cn, ap->a_cnp); 421 create_arg.pvnr_va = *ap->a_vap; 422 423 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_CREATE, 424 &create_arg, sizeof(create_arg), VPTOPNC(ap->a_dvp), 425 ap->a_dvp, NULL); 426 if (error) 427 goto out; 428 429 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 430 create_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 0); 431 432 out: 433 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 434 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 435 vput(ap->a_dvp); 436 return error; 437 } 438 439 int 440 puffs_mknod(void *v) 441 { 442 struct vop_mknod_args /* { 443 const struct vnodeop_desc *a_desc; 444 struct vnode *a_dvp; 445 struct vnode **a_vpp; 446 struct componentname *a_cnp; 447 struct vattr *a_vap; 448 } */ *ap = v; 449 int error; 450 451 PUFFS_VNREQ(mknod); 452 453 puffs_makecn(&mknod_arg.pvnr_cn, ap->a_cnp); 454 mknod_arg.pvnr_va = *ap->a_vap; 455 456 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKNOD, 457 &mknod_arg, sizeof(mknod_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 458 if (error) 459 goto out; 460 461 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 462 mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 463 ap->a_vap->va_rdev); 464 465 out: 466 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 467 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 468 vput(ap->a_dvp); 469 return error; 470 } 471 472 int 473 puffs_open(void *v) 474 { 475 struct vop_open_args /* { 476 const struct vnodeop_desc *a_desc; 477 struct vnode *a_vp; 478 int a_mode; 479 kauth_cred_t a_cred; 480 struct lwp *a_l; 481 } */ *ap = v; 482 483 PUFFS_VNREQ(open); 484 485 open_arg.pvnr_mode = ap->a_mode; 486 puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred); 487 open_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 488 489 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_OPEN, 490 &open_arg, sizeof(open_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 491 } 492 493 int 494 puffs_close(void *v) 495 { 496 struct vop_close_args /* { 497 const struct vnodeop_desc *a_desc; 498 struct vnode *a_vp; 499 int a_fflag; 500 kauth_cred_t a_cred; 501 struct lwp *a_l; 502 } */ *ap = v; 503 504 PUFFS_VNREQ(close); 505 506 close_arg.pvnr_fflag = ap->a_fflag; 507 puffs_credcvt(&close_arg.pvnr_cred, ap->a_cred); 508 close_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 509 510 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 511 &close_arg, sizeof(close_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 512 } 513 514 int 515 puffs_access(void *v) 516 { 517 struct vop_access_args /* { 518 const struct vnodeop_desc *a_desc; 519 struct vnode *a_vp; 520 int a_mode; 521 kauth_cred_t a_cred; 522 struct lwp *a_l; 523 } */ *ap = v; 524 525 PUFFS_VNREQ(access); 526 527 access_arg.pvnr_mode = ap->a_mode; 528 access_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 529 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 530 531 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ACCESS, 532 &access_arg, sizeof(access_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 533 } 534 535 int 536 puffs_getattr(void *v) 537 { 538 struct vop_getattr_args /* { 539 const struct vnodeop_desc *a_desc; 540 struct vnode *a_vp; 541 struct vattr *a_vap; 542 kauth_cred_t a_cred; 543 struct lwp *a_l; 544 } */ *ap = v; 545 int error; 546 547 PUFFS_VNREQ(getattr); 548 549 vattr_null(&getattr_arg.pvnr_va); 550 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 551 getattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 552 553 /* 554 * XXX + XX (dos equis): this can't go through the unlock/lock 555 * cycle, since it can be called from uvn_attach(), which fiddles 556 * around with VXLOCK and therefore breaks vn_lock(). Proper 557 * fix pending. 558 */ 559 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_GETATTR, 560 &getattr_arg, sizeof(getattr_arg), VPTOPNC(ap->a_vp), 561 NULL /* XXXseeabove: should be LOCKEDVP(ap->a_vp) */, NULL); 562 if (error) 563 return error; 564 565 (void)memcpy(ap->a_vap, &getattr_arg.pvnr_va, sizeof(struct vattr)); 566 567 return 0; 568 } 569 570 int 571 puffs_setattr(void *v) 572 { 573 struct vop_getattr_args /* { 574 const struct vnodeop_desc *a_desc; 575 struct vnode *a_vp; 576 struct vattr *a_vap; 577 kauth_cred_t a_cred; 578 struct lwp *a_l; 579 } */ *ap = v; 580 int error; 581 582 PUFFS_VNREQ(setattr); 583 584 (void)memcpy(&setattr_arg.pvnr_va, ap->a_vap, sizeof(struct vattr)); 585 puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred); 586 setattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 587 588 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR, 589 &setattr_arg, sizeof(setattr_arg), VPTOPNC(ap->a_vp), 590 ap->a_vp, NULL); 591 if (error) 592 return error; 593 594 if (ap->a_vap->va_size != VNOVAL) 595 uvm_vnp_setsize(ap->a_vp, ap->a_vap->va_size); 596 597 return 0; 598 } 599 600 int 601 puffs_revoke(void *v) 602 { 603 struct vop_revoke_args /* { 604 const struct vnodeop_desc *a_desc; 605 struct vnode *a_vp; 606 int a_flags; 607 } */ *ap = v; 608 PUFFS_VNREQ(revoke); 609 610 revoke_arg.pvnr_flags = ap->a_flags; 611 612 /* don't really care if userspace doesn't want to play along */ 613 puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REVOKE, 614 &revoke_arg, sizeof(revoke_arg), VPTOPNC(ap->a_vp), NULL, NULL); 615 616 return genfs_revoke(v); 617 } 618 619 /* 620 * There is no technical need to have this travel to userspace 621 * synchronously. So once async reply support is in place, make this 622 * async. 623 */ 624 int 625 puffs_inactive(void *v) 626 { 627 struct vop_inactive_args /* { 628 const struct vnodeop_desc *a_desc; 629 struct vnode *a_vp; 630 struct lwp *a_l; 631 } */ *ap = v; 632 struct puffs_node *pnode; 633 int rv, vnrefs; 634 635 PUFFS_VNREQ(inactive); 636 637 /* 638 * XXX: think about this after we really start unlocking 639 * when going to userspace 640 */ 641 pnode = ap->a_vp->v_data; 642 pnode->pn_stat |= PNODE_INACTIVE; 643 644 inactive_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 645 646 rv = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_INACTIVE, 647 &inactive_arg, sizeof(inactive_arg), VPTOPNC(ap->a_vp), 648 ap->a_vp, NULL); 649 650 /* can't trust userspace return value? simulate safe answer */ 651 if (rv) 652 vnrefs = 1; 653 else 654 vnrefs = inactive_arg.pvnr_backendrefs; 655 656 VOP_UNLOCK(ap->a_vp, 0); 657 658 /* 659 * user server thinks it's gone? then don't be afraid care, 660 * node's life was already all it would ever be 661 */ 662 if (vnrefs == 0) 663 vrecycle(ap->a_vp, NULL, ap->a_l); 664 665 return 0; 666 } 667 668 int 669 puffs_reclaim(void *v) 670 { 671 struct vop_reclaim_args /* { 672 const struct vnodeop_desc *a_desc; 673 struct vnode *a_vp; 674 struct lwp *a_l; 675 } */ *ap = v; 676 struct puffs_mount *pmp; 677 int error; 678 679 PUFFS_VNREQ(reclaim); 680 681 /* 682 * first things first: check if someone is trying to reclaim the 683 * root vnode. do not allow that to travel to userspace. 684 * Note that we don't need to take the lock similarly to 685 * puffs_root(), since there is only one of us. 686 */ 687 if (ap->a_vp->v_flag & VROOT) { 688 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 689 #ifdef DIAGNOSTIC 690 simple_lock(&pmp->pmp_lock); 691 if (pmp->pmp_root == NULL) 692 panic("puffs_reclaim: releasing root vnode (%p) twice", 693 ap->a_vp); 694 simple_unlock(&pmp->pmp_lock); 695 #endif 696 pmp->pmp_root = NULL; 697 puffs_putvnode(ap->a_vp); 698 return 0; 699 } 700 701 reclaim_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 702 703 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_RECLAIM, 704 &reclaim_arg, sizeof(reclaim_arg), VPTOPNC(ap->a_vp), NULL, NULL); 705 #if 0 706 /* 707 * XXX: if reclaim fails for any other reason than the userspace 708 * being dead, we should consider unmounting the filesystem, since 709 * we can't trust it to be in a consistent state anymore. But for 710 * now, just ignore all errors. 711 */ 712 if (error) 713 return error; 714 #endif 715 716 puffs_putvnode(ap->a_vp); 717 718 return 0; 719 } 720 721 int 722 puffs_readdir(void *v) 723 { 724 struct vop_readdir_args /* { 725 const struct vnodeop_desc *a_desc; 726 struct vnode *a_vp; 727 struct uio *a_uio; 728 kauth_cred_t a_cred; 729 int *a_eofflag; 730 off_t **a_cookies; 731 int *a_ncookies; 732 } */ *ap = v; 733 struct puffs_vnreq_readdir *readdir_argp; 734 size_t argsize; 735 struct uio *uio = ap->a_uio; 736 size_t howmuch; 737 int error; 738 739 /* worry about these later */ 740 if (!(ap->a_cookies == NULL && ap->a_ncookies == NULL)) 741 return EOPNOTSUPP; 742 743 argsize = sizeof(struct puffs_vnreq_readdir); 744 readdir_argp = malloc(argsize, M_PUFFS, M_ZERO | M_WAITOK); 745 746 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 747 readdir_argp->pvnr_offset = uio->uio_offset; 748 readdir_argp->pvnr_resid = uio->uio_resid; 749 750 error = puffs_vntouser_adjbuf(MPTOPUFFSMP(ap->a_vp->v_mount), 751 PUFFS_VN_READDIR, (void **)&readdir_argp, &argsize, 752 sizeof(struct puffs_vnreq_readdir), 753 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 754 if (error) 755 goto out; 756 757 /* userspace is cheating? */ 758 if (readdir_argp->pvnr_resid > uio->uio_resid) { 759 error = EINVAL; 760 goto out; 761 } 762 763 /* bouncy-wouncy with the directory data */ 764 howmuch = uio->uio_resid - readdir_argp->pvnr_resid; 765 error = uiomove(readdir_argp->pvnr_dent, howmuch, uio); 766 if (error) 767 goto out; 768 uio->uio_offset = readdir_argp->pvnr_offset; 769 770 out: 771 free(readdir_argp, M_PUFFS); 772 return error; 773 } 774 775 int 776 puffs_poll(void *v) 777 { 778 struct vop_poll_args /* { 779 const struct vnodeop_desc *a_desc; 780 struct vnode *a_vp; 781 int a_events; 782 struct lwp *a_l; 783 }*/ *ap = v; 784 785 PUFFS_VNREQ(poll); 786 787 poll_arg.pvnr_events = ap->a_events; 788 poll_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 789 790 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_POLL, 791 &poll_arg, sizeof(poll_arg), VPTOPNC(ap->a_vp), NULL, NULL); 792 } 793 794 int 795 puffs_fsync(void *v) 796 { 797 struct vop_fsync_args /* { 798 const struct vnodeop_desc *a_desc; 799 struct vnode *a_vp; 800 kauth_cred_t a_cred; 801 int a_flags; 802 off_t a_offlo; 803 off_t a_offhi; 804 struct lwp *a_l; 805 } */ *ap = v; 806 struct puffs_vnreq_fsync *fsync_argp; 807 struct vnode *vp; 808 int pflags, error; 809 810 PUFFS_VNREQ(fsync); 811 812 vp = ap->a_vp; 813 814 pflags = PGO_CLEANIT; 815 if (ap->a_flags & FSYNC_WAIT) { 816 pflags |= PGO_SYNCIO; 817 fsync_argp = &fsync_arg; 818 } else { 819 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 820 M_PUFFS, M_ZERO | M_NOWAIT); 821 if (fsync_argp == NULL) 822 return ENOMEM; 823 } 824 825 /* 826 * flush pages to avoid being overly dirty 827 */ 828 simple_lock(&vp->v_interlock); 829 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 830 round_page(ap->a_offhi), pflags); 831 if (error) 832 return error; 833 834 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 835 fsync_argp->pvnr_flags = ap->a_flags; 836 fsync_argp->pvnr_offlo = ap->a_offlo; 837 fsync_argp->pvnr_offhi = ap->a_offhi; 838 fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 839 840 /* 841 * XXX: see comment at puffs_getattr about locking 842 * 843 * If we are not required to wait, do a FAF operation. 844 * Otherwise block here. 845 */ 846 if (ap->a_flags & FSYNC_WAIT) { 847 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 848 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 849 VPTOPNC(vp), NULL /* XXXshouldbe: vp */, NULL); 850 } else { 851 /* FAF is always "succesful" */ 852 error = 0; 853 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 854 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 855 VPTOPNC(vp)); 856 } 857 858 return error; 859 } 860 861 int 862 puffs_seek(void *v) 863 { 864 struct vop_seek_args /* { 865 const struct vnodeop_desc *a_desc; 866 struct vnode *a_vp; 867 off_t a_oldoff; 868 off_t a_newoff; 869 kauth_cred_t a_cred; 870 } */ *ap = v; 871 872 PUFFS_VNREQ(seek); 873 874 seek_arg.pvnr_oldoff = ap->a_oldoff; 875 seek_arg.pvnr_newoff = ap->a_newoff; 876 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 877 878 /* 879 * XXX: seems like seek is called with an unlocked vp, but 880 * it can't hurt to play safe 881 */ 882 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 883 &seek_arg, sizeof(seek_arg), VPTOPNC(ap->a_vp), 884 LOCKEDVP(ap->a_vp), NULL); 885 } 886 887 int 888 puffs_remove(void *v) 889 { 890 struct vop_remove_args /* { 891 const struct vnodeop_desc *a_desc; 892 struct vnode *a_dvp; 893 struct vnode *a_vp; 894 struct componentname *a_cnp; 895 } */ *ap = v; 896 int error; 897 898 PUFFS_VNREQ(remove); 899 900 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 901 puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp); 902 903 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE, 904 &remove_arg, sizeof(remove_arg), VPTOPNC(ap->a_dvp), 905 ap->a_dvp, ap->a_vp); 906 907 vput(ap->a_vp); 908 vput(ap->a_dvp); 909 910 return error; 911 } 912 913 int 914 puffs_mkdir(void *v) 915 { 916 struct vop_mkdir_args /* { 917 const struct vnodeop_desc *a_desc; 918 struct vnode *a_dvp; 919 struct vnode **a_vpp; 920 struct componentname *a_cnp; 921 struct vattr *a_vap; 922 } */ *ap = v; 923 int error; 924 925 PUFFS_VNREQ(mkdir); 926 927 puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp); 928 mkdir_arg.pvnr_va = *ap->a_vap; 929 930 /* XXX: wouldn't need to relock dvp, but that's life */ 931 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR, 932 &mkdir_arg, sizeof(mkdir_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 933 if (error) 934 goto out; 935 936 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 937 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 938 939 out: 940 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 941 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 942 vput(ap->a_dvp); 943 return error; 944 } 945 946 int 947 puffs_rmdir(void *v) 948 { 949 struct vop_rmdir_args /* { 950 const struct vnodeop_desc *a_desc; 951 struct vnode *a_dvp; 952 struct vnode *a_vp; 953 struct componentname *a_cnp; 954 } */ *ap = v; 955 int error; 956 957 PUFFS_VNREQ(rmdir); 958 959 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 960 puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp); 961 962 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR, 963 &rmdir_arg, sizeof(rmdir_arg), VPTOPNC(ap->a_dvp), 964 ap->a_dvp, ap->a_vp); 965 966 vput(ap->a_dvp); 967 vput(ap->a_vp); 968 969 return error; 970 } 971 972 int 973 puffs_link(void *v) 974 { 975 struct vop_link_args /* { 976 const struct vnodeop_desc *a_desc; 977 struct vnode *a_dvp; 978 struct vnode *a_vp; 979 struct componentname *a_cnp; 980 }*/ *ap = v; 981 int error; 982 983 PUFFS_VNREQ(link); 984 985 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 986 puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp); 987 988 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK, 989 &link_arg, sizeof(link_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 990 991 vput(ap->a_dvp); 992 993 return error; 994 } 995 996 int 997 puffs_symlink(void *v) 998 { 999 struct vop_symlink_args /* { 1000 const struct vnodeop_desc *a_desc; 1001 struct vnode *a_dvp; 1002 struct vnode **a_vpp; 1003 struct componentname *a_cnp; 1004 struct vattr *a_vap; 1005 char *a_target; 1006 }*/ *ap = v; 1007 int error; 1008 1009 PUFFS_VNREQ(symlink); /* XXX: large structure */ 1010 1011 *ap->a_vpp = NULL; 1012 1013 puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp); 1014 symlink_arg.pvnr_va = *ap->a_vap; 1015 (void)strlcpy(symlink_arg.pvnr_link, ap->a_target, 1016 sizeof(symlink_arg.pvnr_link)); 1017 1018 /* XXX: don't need to relock parent */ 1019 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), 1020 PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg), 1021 VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1022 if (error) 1023 goto out; 1024 1025 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1026 symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0); 1027 1028 out: 1029 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1030 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1031 vput(ap->a_dvp); 1032 return error; 1033 } 1034 1035 int 1036 puffs_readlink(void *v) 1037 { 1038 struct vop_readlink_args /* { 1039 const struct vnodeop_desc *a_desc; 1040 struct vnode *a_vp; 1041 struct uio *a_uio; 1042 kauth_cred_t a_cred; 1043 } */ *ap = v; 1044 int error; 1045 1046 PUFFS_VNREQ(readlink); 1047 1048 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1049 readlink_arg.pvnr_linklen = sizeof(readlink_arg.pvnr_link); 1050 1051 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1052 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 1053 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1054 if (error) 1055 return error; 1056 1057 readlink_arg.pvnr_link[readlink_arg.pvnr_linklen] = '\0'; 1058 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1059 ap->a_uio); 1060 } 1061 1062 /* XXXXXXX: think about locking & userspace op delocking... */ 1063 int 1064 puffs_rename(void *v) 1065 { 1066 struct vop_rename_args /* { 1067 const struct vnodeop_desc *a_desc; 1068 struct vnode *a_fdvp; 1069 struct vnode *a_fvp; 1070 struct componentname *a_fcnp; 1071 struct vnode *a_tdvp; 1072 struct vnode *a_tvp; 1073 struct componentname *a_tcnp; 1074 }*/ *ap = v; 1075 int error; 1076 1077 PUFFS_VNREQ(rename); 1078 1079 /* 1080 * participate in the duck hunt 1081 * (I could do with some canard a la presse, so hopefully 1082 * this is succesful) 1083 */ 1084 KASSERT(ap->a_tdvp != ap->a_tvp); 1085 1086 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) { 1087 error = EXDEV; 1088 goto out; 1089 } 1090 1091 rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1092 rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1093 if (ap->a_tvp) 1094 rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1095 else 1096 rename_arg.pvnr_cookie_targ = NULL; 1097 puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp); 1098 puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp); 1099 1100 error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount), 1101 PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg), 1102 VPTOPNC(ap->a_fdvp), NULL, NULL); 1103 1104 out: 1105 vput(ap->a_tdvp); 1106 if (ap->a_tvp != NULL) 1107 vput(ap->a_tvp); 1108 1109 vrele(ap->a_fdvp); 1110 vrele(ap->a_fvp); 1111 1112 return error; 1113 } 1114 1115 int 1116 puffs_read(void *v) 1117 { 1118 struct vop_read_args /* { 1119 const struct vnodeop_desc *a_desc; 1120 struct vnode *a_vp; 1121 struct uio *a_uio; 1122 int a_ioflag; 1123 kauth_cred_t a_cred; 1124 } */ *ap = v; 1125 struct puffs_vnreq_read *read_argp; 1126 struct puffs_mount *pmp; 1127 struct vnode *vp; 1128 struct uio *uio; 1129 void *win; 1130 size_t tomove, argsize; 1131 vsize_t bytelen; 1132 int error, ubcflags; 1133 1134 uio = ap->a_uio; 1135 vp = ap->a_vp; 1136 read_argp = NULL; 1137 error = 0; 1138 pmp = MPTOPUFFSMP(vp->v_mount); 1139 1140 /* std sanity */ 1141 if (uio->uio_resid == 0) 1142 return 0; 1143 if (uio->uio_offset < 0) 1144 return EINVAL; 1145 1146 ubcflags = 0; 1147 if (UBC_WANT_UNMAP(vp) || pmp->pmp_flags & PUFFSFLAG_NOCACHE) 1148 ubcflags = UBC_UNMAP; 1149 1150 if (vp->v_type == VREG) { 1151 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1152 1153 while (uio->uio_resid > 0) { 1154 bytelen = MIN(uio->uio_resid, 1155 vp->v_size - uio->uio_offset); 1156 if (bytelen == 0) 1157 break; 1158 1159 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1160 &bytelen, advice, UBC_READ); 1161 error = uiomove(win, bytelen, uio); 1162 ubc_release(win, ubcflags); 1163 if (error) 1164 break; 1165 } 1166 1167 /* tell page cache to go flush itself */ 1168 if (pmp->pmp_flags & PUFFSFLAG_NOCACHE) { 1169 simple_lock(&vp->v_interlock); 1170 VOP_PUTPAGES(vp, 0, 0, 1171 PGO_ALLPAGES | PGO_FREE | PGO_SYNCIO); 1172 } 1173 1174 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1175 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1176 } else { 1177 #ifdef DIAGNOSTIC 1178 if (!(vp->v_type == VDIR || vp->v_type == VLNK)) 1179 panic("puffs_read: bad vnode type %d\n", vp->v_type); 1180 #endif 1181 /* 1182 * in case it's not a regular file, do it in the 1183 * old-fashioned style, i.e. explicit read without going 1184 * through the page cache. 1185 * 1186 * XXX: this path is not really tested now 1187 */ 1188 1189 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1190 argsize = sizeof(struct puffs_vnreq_read); 1191 read_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1192 1193 error = 0; 1194 while (uio->uio_resid > 0) { 1195 read_argp->pvnr_ioflag = ap->a_ioflag; 1196 read_argp->pvnr_resid = tomove; 1197 read_argp->pvnr_offset = uio->uio_offset; 1198 puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred); 1199 1200 argsize = sizeof(struct puffs_vnreq_read); 1201 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1202 (void **)&read_argp, &argsize, 1203 sizeof(struct puffs_vnreq_read), VPTOPNC(ap->a_vp), 1204 ap->a_vp, NULL); 1205 if (error) 1206 break; 1207 1208 if (read_argp->pvnr_resid > tomove) { 1209 error = EINVAL; 1210 break; 1211 } 1212 1213 error = uiomove(read_argp->pvnr_data, 1214 tomove - read_argp->pvnr_resid, uio); 1215 1216 /* 1217 * in case the file is out of juice, resid from 1218 * userspace is != 0. and the error-case is 1219 * quite obvious 1220 */ 1221 if (error || read_argp->pvnr_resid) 1222 break; 1223 1224 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1225 } 1226 } 1227 1228 if (read_argp) 1229 free(read_argp, M_PUFFS); 1230 return error; 1231 } 1232 1233 int 1234 puffs_write(void *v) 1235 { 1236 struct vop_write_args /* { 1237 const struct vnodeop_desc *a_desc; 1238 struct vnode *a_vp; 1239 struct uio *a_uio; 1240 int a_ioflag; 1241 kauth_cred_t a_cred; 1242 }*/ *ap = v; 1243 struct puffs_vnreq_write *write_argp; 1244 struct puffs_mount *pmp; 1245 struct uio *uio; 1246 struct vnode *vp; 1247 void *win; 1248 size_t tomove, argsize; 1249 off_t oldoff, newoff, origoff; 1250 vsize_t bytelen; 1251 int error, uflags, pflags; 1252 int async, ubcflags; 1253 1254 vp = ap->a_vp; 1255 uio = ap->a_uio; 1256 async = vp->v_mount->mnt_flag & MNT_ASYNC; 1257 error = uflags = 0; 1258 write_argp = NULL; 1259 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1260 1261 ubcflags = 0; 1262 if (UBC_WANT_UNMAP(vp) || pmp->pmp_flags & PUFFSFLAG_NOCACHE) 1263 ubcflags = UBC_UNMAP; 1264 1265 if (vp->v_type == VREG) { 1266 /* 1267 * userspace *should* be allowed to control this, 1268 * but with UBC it's a bit unclear how to handle it 1269 */ 1270 if (ap->a_ioflag & IO_APPEND) 1271 uio->uio_offset = vp->v_size; 1272 1273 origoff = uio->uio_offset; 1274 while (uio->uio_resid > 0) { 1275 uflags |= PUFFS_UPDATECTIME; 1276 uflags |= PUFFS_UPDATEMTIME; 1277 oldoff = uio->uio_offset; 1278 bytelen = uio->uio_resid; 1279 1280 win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, 1281 UVM_ADV_NORMAL, UBC_WRITE); 1282 error = uiomove(win, bytelen, uio); 1283 1284 /* 1285 * did we grow the file? 1286 * XXX: should probably ask userspace to extend 1287 * it's idea of the *first* before growing it 1288 * here. Or we need some mechanism to "rollback" 1289 * in case putpages fails. 1290 */ 1291 newoff = oldoff + bytelen; 1292 if (vp->v_size < newoff) { 1293 uflags |= PUFFS_UPDATESIZE; 1294 uvm_vnp_setsize(vp, newoff); 1295 1296 /* 1297 * in case we couldn't copy data to the 1298 * window, zero it out so that we don't 1299 * have any random leftovers in there. 1300 */ 1301 if (error) 1302 memset(win, 0, bytelen); 1303 } 1304 1305 ubc_release(win, ubcflags); 1306 if (error) 1307 break; 1308 1309 /* ok, I really need to admit: why's this? */ 1310 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 1311 simple_lock(&vp->v_interlock); 1312 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1313 uio->uio_offset & ~0xffff, PGO_CLEANIT); 1314 if (error) 1315 break; 1316 } 1317 } 1318 1319 pflags = 0; 1320 if (ap->a_ioflag & IO_SYNC) 1321 pflags |= PGO_CLEANIT | PGO_SYNCIO; 1322 if (pmp->pmp_flags & PUFFSFLAG_NOCACHE) 1323 pflags |= PGO_CLEANIT | PGO_SYNCIO | PGO_FREE; 1324 1325 if (error == 0 && pflags) { 1326 simple_lock(&vp->v_interlock); 1327 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1328 round_page(uio->uio_offset), pflags); 1329 } 1330 1331 puffs_updatenode(vp, uflags); 1332 } else { 1333 1334 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1335 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1336 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1337 1338 while (uio->uio_resid > 0) { 1339 write_argp->pvnr_ioflag = ap->a_ioflag; 1340 write_argp->pvnr_resid = tomove; 1341 write_argp->pvnr_offset = uio->uio_offset; 1342 puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred); 1343 error = uiomove(write_argp->pvnr_data, tomove, uio); 1344 if (error) 1345 break; 1346 1347 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1348 PUFFS_VN_WRITE, write_argp, argsize, 1349 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1350 if (error) { 1351 /* restore uiomove */ 1352 uio->uio_resid += tomove; 1353 uio->uio_offset -= tomove; 1354 break; 1355 } 1356 if (write_argp->pvnr_resid > tomove) { 1357 /* 1358 * XXX: correct file size is a mystery, 1359 * we can only guess 1360 */ 1361 error = EINVAL; 1362 break; 1363 } 1364 1365 /* adjust file size */ 1366 uvm_vnp_setsize(vp, uio->uio_offset); 1367 1368 /* didn't move everything? bad userspace. bail */ 1369 if (write_argp->pvnr_resid != 0) { 1370 uio->uio_resid += write_argp->pvnr_resid; 1371 uio->uio_offset -= write_argp->pvnr_resid; 1372 error = EIO; 1373 break; 1374 } 1375 1376 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1377 } 1378 } 1379 1380 if (write_argp) 1381 free(write_argp, M_PUFFS); 1382 return error; 1383 } 1384 1385 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1386 1387 #define FCNIOCTL_ARG_MAX 1<<16 1388 int 1389 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1390 { 1391 /* struct vop_ioctl_args { 1392 const struct vnodeop_desc *a_desc; 1393 struct vnode *a_vp; 1394 u_long a_command; 1395 void *a_data; 1396 int a_fflag; 1397 kauth_cred_t a_cred; 1398 struct lwp *a_l; 1399 }*ap = v; */ 1400 struct puffs_mount *pmp; 1401 struct puffs_sizepark pspark; 1402 void *kernbuf; 1403 size_t copylen; 1404 int error; 1405 1406 PUFFS_VNREQ(fcnioctl); 1407 1408 /* 1409 * Since this op gives the filesystem (almost) complete control on 1410 * how much it is allowed to copy from the calling process 1411 * address space, do not enable it by default, since it would 1412 * be a whopping security hole. 1413 */ 1414 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1415 if ((pmp->pmp_flags & PUFFSFLAG_ALLOWCTL) == 0) 1416 return EINVAL; /* only shoe that fits */ 1417 1418 /* fill in sizereq and store it */ 1419 pspark.pkso_reqid = puffs_getreqid(pmp); 1420 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1421 pspark.pkso_copybuf = ap->a_data; 1422 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1423 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1424 1425 /* then fill in actual request and shoot it off */ 1426 fcnioctl_arg.pvnr_command = ap->a_command; 1427 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1428 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1429 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1430 1431 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1432 &fcnioctl_arg, sizeof(fcnioctl_arg), VPTOPNC(ap->a_vp), 1433 pspark.pkso_reqid, NULL, NULL); 1434 1435 /* if we don't need to copy data, we're done */ 1436 if (error || !fcnioctl_arg.pvnr_copyback) 1437 return error; 1438 1439 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1440 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1441 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1442 if (error) 1443 goto out; 1444 error = copyout(kernbuf, ap->a_data, copylen); 1445 1446 out: 1447 free(kernbuf, M_PUFFS); 1448 return error; 1449 } 1450 1451 int 1452 puffs_ioctl(void *v) 1453 { 1454 1455 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1456 } 1457 1458 int 1459 puffs_fcntl(void *v) 1460 { 1461 1462 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1463 } 1464 1465 int 1466 puffs_print(void *v) 1467 { 1468 struct vop_print_args /* { 1469 struct vnode *a_vp; 1470 } */ *ap = v; 1471 struct vnode *vp = ap->a_vp; 1472 struct puffs_node *pn = vp->v_data; 1473 1474 PUFFS_VNREQ(print); 1475 1476 /* kernel portion */ 1477 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1478 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1479 if (vp->v_type == VFIFO) 1480 fifo_printinfo(vp); 1481 lockmgr_printinfo(&vp->v_lock); 1482 1483 /* userspace portion */ 1484 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_PRINT, 1485 &print_arg, sizeof(print_arg), VPTOPNC(ap->a_vp), 1486 LOCKEDVP(ap->a_vp), NULL); 1487 } 1488 1489 int 1490 puffs_pathconf(void *v) 1491 { 1492 struct vop_pathconf_args /* { 1493 const struct vnodeop_desc *a_desc; 1494 struct vnode *a_vp; 1495 int a_name; 1496 register_t *a_retval; 1497 } */ *ap = v; 1498 int error; 1499 1500 PUFFS_VNREQ(pathconf); 1501 1502 pathconf_arg.pvnr_name = ap->a_name; 1503 1504 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1505 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 1506 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1507 if (error) 1508 return error; 1509 1510 *ap->a_retval = pathconf_arg.pvnr_retval; 1511 1512 return 0; 1513 } 1514 1515 int 1516 puffs_advlock(void *v) 1517 { 1518 struct vop_advlock_args /* { 1519 const struct vnodeop_desc *a_desc; 1520 struct vnode *a_vp; 1521 void *a_id; 1522 int a_op; 1523 struct flock *a_fl; 1524 int a_flags; 1525 } */ *ap = v; 1526 int error; 1527 1528 PUFFS_VNREQ(advlock); 1529 1530 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1531 if (error) 1532 return error; 1533 advlock_arg.pvnr_id = ap->a_id; 1534 advlock_arg.pvnr_op = ap->a_op; 1535 advlock_arg.pvnr_flags = ap->a_flags; 1536 1537 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1538 &advlock_arg, sizeof(advlock_arg), VPTOPNC(ap->a_vp), NULL, NULL); 1539 } 1540 /* 1541 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1542 */ 1543 int 1544 puffs_strategy(void *v) 1545 { 1546 struct vop_strategy_args /* { 1547 const struct vnodeop_desc *a_desc; 1548 struct vnode *a_vp; 1549 struct buf *a_bp; 1550 } */ *ap = v; 1551 struct puffs_mount *pmp; 1552 struct puffs_vnreq_read *read_argp; 1553 struct puffs_vnreq_write *write_argp; 1554 struct buf *bp; 1555 size_t argsize; 1556 int error; 1557 1558 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1559 bp = ap->a_bp; 1560 1561 #ifdef DIAGNOSTIC 1562 if (bp->b_bcount > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1563 panic("puffs_strategy: wildly inappropriate buf bcount %d", 1564 bp->b_bcount); 1565 #endif 1566 1567 if (bp->b_flags & B_READ) { 1568 argsize = sizeof(struct puffs_vnreq_read); 1569 read_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1570 read_argp->pvnr_ioflag = 0; 1571 read_argp->pvnr_resid = bp->b_bcount; 1572 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1573 /* XXX: puffs_credcvt */ 1574 1575 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1576 (void **)&read_argp, &argsize, argsize, 1577 VPTOPNC(ap->a_vp), LOCKEDVP(ap->a_vp), NULL); 1578 1579 /* XXX */ 1580 if (error) 1581 printf("virhe %d\n", error); 1582 1583 /* XXX */ 1584 bp->b_resid = read_argp->pvnr_resid; 1585 (void)memcpy(bp->b_data, read_argp->pvnr_data, bp->b_bcount); 1586 free(read_argp, M_PUFFS); 1587 } else { 1588 argsize = sizeof(struct puffs_vnreq_write) + bp->b_bcount; 1589 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1590 write_argp->pvnr_ioflag = 0; 1591 write_argp->pvnr_resid = bp->b_bcount; 1592 write_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1593 /* XXX, stupid */ 1594 (void)memcpy(&write_argp->pvnr_data, bp->b_data, bp->b_bcount); 1595 1596 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1597 PUFFS_VN_WRITE, write_argp, argsize, 1598 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1599 if (error) 1600 goto out; 1601 1602 bp->b_resid = write_argp->pvnr_resid; 1603 1604 /* XXX: if any of the following trigger, we're in trouble */ 1605 1606 /* check 1 */ 1607 if (write_argp->pvnr_resid != 0) 1608 error = EIO; 1609 1610 /* check 2 */ 1611 if (write_argp->pvnr_resid > bp->b_bcount) 1612 error = EINVAL; 1613 } 1614 1615 out: 1616 biodone(ap->a_bp); 1617 return error; 1618 } 1619 1620 /* 1621 * The rest don't get a free trip to userspace and back, they 1622 * have to stay within the kernel. 1623 */ 1624 1625 /* 1626 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 1627 * well, maybe somehow, somewhere, some day .... 1628 */ 1629 int 1630 puffs_bmap(void *v) 1631 { 1632 struct vop_bmap_args /* { 1633 const struct vnodeop_desc *a_desc; 1634 struct vnode *a_vp; 1635 daddr_t a_bn; 1636 struct vnode **a_vpp; 1637 daddr_t *a_bnp; 1638 int *a_runp; 1639 } */ *ap = v; 1640 struct puffs_mount *pmp; 1641 1642 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1643 1644 if (ap->a_vpp) 1645 *ap->a_vpp = ap->a_vp; 1646 if (ap->a_bnp) 1647 *ap->a_bnp = ap->a_bn; 1648 if (ap->a_runp) 1649 *ap->a_runp = pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX; 1650 1651 return 0; 1652 } 1653 1654 /* 1655 * moreXXX: yes, todo 1656 */ 1657 int 1658 puffs_lock(void *v) 1659 { 1660 struct vop_lock_args /* { 1661 struct vnode *a_vp; 1662 int a_flags; 1663 }*/ *ap = v; 1664 struct vnode *vp = ap->a_vp; 1665 1666 #if 0 1667 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1668 #endif 1669 1670 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 1671 } 1672 1673 int 1674 puffs_unlock(void *v) 1675 { 1676 struct vop_unlock_args /* { 1677 struct vnode *a_vp; 1678 int a_flags; 1679 } */ *ap = v; 1680 struct vnode *vp = ap->a_vp; 1681 1682 #if 0 1683 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1684 #endif 1685 1686 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 1687 } 1688 1689 int 1690 puffs_islocked(void *v) 1691 { 1692 struct vop_islocked_args *ap = v; 1693 int rv; 1694 1695 rv = lockstatus(&ap->a_vp->v_lock); 1696 return rv; 1697 } 1698 1699 int 1700 puffs_generic(void *v) 1701 { 1702 struct vop_generic_args *ap = v; 1703 1704 (void)ap; 1705 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 1706 1707 return EOPNOTSUPP; 1708 } 1709
Indexes created Tue Sep 30 20:09:53 GMT 2025