puffs_vnops.c revision 1.13
1 /* $NetBSD: puffs_vnops.c,v 1.13 2006/11/18 12:39:48 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 1.13 2006/11/18 12:39:48 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 struct mount *mp; 546 int error; 547 548 PUFFS_VNREQ(getattr); 549 550 mp = ap->a_vp->v_mount; 551 552 vattr_null(&getattr_arg.pvnr_va); 553 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 554 getattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 555 556 /* 557 * XXX + XX (dos equis): this can't go through the unlock/lock 558 * cycle, since it can be called from uvn_attach(), which fiddles 559 * around with VXLOCK and therefore breaks vn_lock(). Proper 560 * fix pending. 561 */ 562 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_GETATTR, 563 &getattr_arg, sizeof(getattr_arg), VPTOPNC(ap->a_vp), 564 NULL /* XXXseeabove: should be LOCKEDVP(ap->a_vp) */, NULL); 565 if (error) 566 return error; 567 568 (void)memcpy(ap->a_vap, &getattr_arg.pvnr_va, sizeof(struct vattr)); 569 570 /* 571 * fill in information userspace does not have 572 * XXX: but would it be better to do fsid at the generic level? 573 */ 574 ap->a_vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 575 576 return 0; 577 } 578 579 int 580 puffs_setattr(void *v) 581 { 582 struct vop_getattr_args /* { 583 const struct vnodeop_desc *a_desc; 584 struct vnode *a_vp; 585 struct vattr *a_vap; 586 kauth_cred_t a_cred; 587 struct lwp *a_l; 588 } */ *ap = v; 589 int error; 590 591 PUFFS_VNREQ(setattr); 592 593 (void)memcpy(&setattr_arg.pvnr_va, ap->a_vap, sizeof(struct vattr)); 594 puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred); 595 setattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 596 597 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR, 598 &setattr_arg, sizeof(setattr_arg), VPTOPNC(ap->a_vp), 599 ap->a_vp, NULL); 600 if (error) 601 return error; 602 603 if (ap->a_vap->va_size != VNOVAL) 604 uvm_vnp_setsize(ap->a_vp, ap->a_vap->va_size); 605 606 return 0; 607 } 608 609 int 610 puffs_revoke(void *v) 611 { 612 struct vop_revoke_args /* { 613 const struct vnodeop_desc *a_desc; 614 struct vnode *a_vp; 615 int a_flags; 616 } */ *ap = v; 617 PUFFS_VNREQ(revoke); 618 619 revoke_arg.pvnr_flags = ap->a_flags; 620 621 /* don't really care if userspace doesn't want to play along */ 622 puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REVOKE, 623 &revoke_arg, sizeof(revoke_arg), VPTOPNC(ap->a_vp), NULL, NULL); 624 625 return genfs_revoke(v); 626 } 627 628 /* 629 * There is no technical need to have this travel to userspace 630 * synchronously. So once async reply support is in place, make this 631 * async. 632 */ 633 int 634 puffs_inactive(void *v) 635 { 636 struct vop_inactive_args /* { 637 const struct vnodeop_desc *a_desc; 638 struct vnode *a_vp; 639 struct lwp *a_l; 640 } */ *ap = v; 641 struct puffs_node *pnode; 642 int rv, vnrefs; 643 644 PUFFS_VNREQ(inactive); 645 646 /* 647 * XXX: think about this after we really start unlocking 648 * when going to userspace 649 */ 650 pnode = ap->a_vp->v_data; 651 pnode->pn_stat |= PNODE_INACTIVE; 652 653 inactive_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 654 655 rv = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_INACTIVE, 656 &inactive_arg, sizeof(inactive_arg), VPTOPNC(ap->a_vp), 657 ap->a_vp, NULL); 658 659 /* can't trust userspace return value? simulate safe answer */ 660 if (rv) 661 vnrefs = 1; 662 else 663 vnrefs = inactive_arg.pvnr_backendrefs; 664 665 VOP_UNLOCK(ap->a_vp, 0); 666 667 /* 668 * user server thinks it's gone? then don't be afraid care, 669 * node's life was already all it would ever be 670 */ 671 if (vnrefs == 0) 672 vrecycle(ap->a_vp, NULL, ap->a_l); 673 674 return 0; 675 } 676 677 int 678 puffs_reclaim(void *v) 679 { 680 struct vop_reclaim_args /* { 681 const struct vnodeop_desc *a_desc; 682 struct vnode *a_vp; 683 struct lwp *a_l; 684 } */ *ap = v; 685 struct puffs_mount *pmp; 686 int error; 687 688 PUFFS_VNREQ(reclaim); 689 690 /* 691 * first things first: check if someone is trying to reclaim the 692 * root vnode. do not allow that to travel to userspace. 693 * Note that we don't need to take the lock similarly to 694 * puffs_root(), since there is only one of us. 695 */ 696 if (ap->a_vp->v_flag & VROOT) { 697 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 698 #ifdef DIAGNOSTIC 699 simple_lock(&pmp->pmp_lock); 700 if (pmp->pmp_root == NULL) 701 panic("puffs_reclaim: releasing root vnode (%p) twice", 702 ap->a_vp); 703 simple_unlock(&pmp->pmp_lock); 704 #endif 705 pmp->pmp_root = NULL; 706 puffs_putvnode(ap->a_vp); 707 return 0; 708 } 709 710 reclaim_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 711 712 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_RECLAIM, 713 &reclaim_arg, sizeof(reclaim_arg), VPTOPNC(ap->a_vp), NULL, NULL); 714 #if 0 715 /* 716 * XXX: if reclaim fails for any other reason than the userspace 717 * being dead, we should consider unmounting the filesystem, since 718 * we can't trust it to be in a consistent state anymore. But for 719 * now, just ignore all errors. 720 */ 721 if (error) 722 return error; 723 #endif 724 725 puffs_putvnode(ap->a_vp); 726 727 return 0; 728 } 729 730 int 731 puffs_readdir(void *v) 732 { 733 struct vop_readdir_args /* { 734 const struct vnodeop_desc *a_desc; 735 struct vnode *a_vp; 736 struct uio *a_uio; 737 kauth_cred_t a_cred; 738 int *a_eofflag; 739 off_t **a_cookies; 740 int *a_ncookies; 741 } */ *ap = v; 742 struct puffs_vnreq_readdir *readdir_argp; 743 size_t argsize; 744 struct uio *uio = ap->a_uio; 745 size_t howmuch; 746 int error; 747 748 /* worry about these later */ 749 if (!(ap->a_cookies == NULL && ap->a_ncookies == NULL)) 750 return EOPNOTSUPP; 751 752 argsize = sizeof(struct puffs_vnreq_readdir); 753 readdir_argp = malloc(argsize, M_PUFFS, M_ZERO | M_WAITOK); 754 755 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 756 readdir_argp->pvnr_offset = uio->uio_offset; 757 readdir_argp->pvnr_resid = uio->uio_resid; 758 759 error = puffs_vntouser_adjbuf(MPTOPUFFSMP(ap->a_vp->v_mount), 760 PUFFS_VN_READDIR, (void **)&readdir_argp, &argsize, 761 sizeof(struct puffs_vnreq_readdir), 762 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 763 if (error) 764 goto out; 765 766 /* userspace is cheating? */ 767 if (readdir_argp->pvnr_resid > uio->uio_resid) { 768 error = EINVAL; 769 goto out; 770 } 771 772 /* bouncy-wouncy with the directory data */ 773 howmuch = uio->uio_resid - readdir_argp->pvnr_resid; 774 error = uiomove(readdir_argp->pvnr_dent, howmuch, uio); 775 if (error) 776 goto out; 777 uio->uio_offset = readdir_argp->pvnr_offset; 778 779 out: 780 free(readdir_argp, M_PUFFS); 781 return error; 782 } 783 784 int 785 puffs_poll(void *v) 786 { 787 struct vop_poll_args /* { 788 const struct vnodeop_desc *a_desc; 789 struct vnode *a_vp; 790 int a_events; 791 struct lwp *a_l; 792 }*/ *ap = v; 793 794 PUFFS_VNREQ(poll); 795 796 poll_arg.pvnr_events = ap->a_events; 797 poll_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 798 799 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_POLL, 800 &poll_arg, sizeof(poll_arg), VPTOPNC(ap->a_vp), NULL, NULL); 801 } 802 803 int 804 puffs_fsync(void *v) 805 { 806 struct vop_fsync_args /* { 807 const struct vnodeop_desc *a_desc; 808 struct vnode *a_vp; 809 kauth_cred_t a_cred; 810 int a_flags; 811 off_t a_offlo; 812 off_t a_offhi; 813 struct lwp *a_l; 814 } */ *ap = v; 815 struct puffs_vnreq_fsync *fsync_argp; 816 struct vnode *vp; 817 int pflags, error; 818 819 PUFFS_VNREQ(fsync); 820 821 vp = ap->a_vp; 822 823 pflags = PGO_CLEANIT; 824 if (ap->a_flags & FSYNC_WAIT) { 825 pflags |= PGO_SYNCIO; 826 fsync_argp = &fsync_arg; 827 } else { 828 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 829 M_PUFFS, M_ZERO | M_NOWAIT); 830 if (fsync_argp == NULL) 831 return ENOMEM; 832 } 833 834 /* 835 * flush pages to avoid being overly dirty 836 */ 837 simple_lock(&vp->v_interlock); 838 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 839 round_page(ap->a_offhi), pflags); 840 if (error) 841 return error; 842 843 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 844 fsync_argp->pvnr_flags = ap->a_flags; 845 fsync_argp->pvnr_offlo = ap->a_offlo; 846 fsync_argp->pvnr_offhi = ap->a_offhi; 847 fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 848 849 /* 850 * XXX: see comment at puffs_getattr about locking 851 * 852 * If we are not required to wait, do a FAF operation. 853 * Otherwise block here. 854 */ 855 if (ap->a_flags & FSYNC_WAIT) { 856 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 857 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 858 VPTOPNC(vp), NULL /* XXXshouldbe: vp */, NULL); 859 } else { 860 /* FAF is always "succesful" */ 861 error = 0; 862 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 863 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 864 VPTOPNC(vp)); 865 } 866 867 return error; 868 } 869 870 int 871 puffs_seek(void *v) 872 { 873 struct vop_seek_args /* { 874 const struct vnodeop_desc *a_desc; 875 struct vnode *a_vp; 876 off_t a_oldoff; 877 off_t a_newoff; 878 kauth_cred_t a_cred; 879 } */ *ap = v; 880 881 PUFFS_VNREQ(seek); 882 883 seek_arg.pvnr_oldoff = ap->a_oldoff; 884 seek_arg.pvnr_newoff = ap->a_newoff; 885 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 886 887 /* 888 * XXX: seems like seek is called with an unlocked vp, but 889 * it can't hurt to play safe 890 */ 891 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 892 &seek_arg, sizeof(seek_arg), VPTOPNC(ap->a_vp), 893 LOCKEDVP(ap->a_vp), NULL); 894 } 895 896 int 897 puffs_remove(void *v) 898 { 899 struct vop_remove_args /* { 900 const struct vnodeop_desc *a_desc; 901 struct vnode *a_dvp; 902 struct vnode *a_vp; 903 struct componentname *a_cnp; 904 } */ *ap = v; 905 int error; 906 907 PUFFS_VNREQ(remove); 908 909 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 910 puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp); 911 912 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE, 913 &remove_arg, sizeof(remove_arg), VPTOPNC(ap->a_dvp), 914 ap->a_dvp, ap->a_vp); 915 916 vput(ap->a_vp); 917 vput(ap->a_dvp); 918 919 return error; 920 } 921 922 int 923 puffs_mkdir(void *v) 924 { 925 struct vop_mkdir_args /* { 926 const struct vnodeop_desc *a_desc; 927 struct vnode *a_dvp; 928 struct vnode **a_vpp; 929 struct componentname *a_cnp; 930 struct vattr *a_vap; 931 } */ *ap = v; 932 int error; 933 934 PUFFS_VNREQ(mkdir); 935 936 puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp); 937 mkdir_arg.pvnr_va = *ap->a_vap; 938 939 /* XXX: wouldn't need to relock dvp, but that's life */ 940 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR, 941 &mkdir_arg, sizeof(mkdir_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 942 if (error) 943 goto out; 944 945 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 946 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 947 948 out: 949 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 950 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 951 vput(ap->a_dvp); 952 return error; 953 } 954 955 int 956 puffs_rmdir(void *v) 957 { 958 struct vop_rmdir_args /* { 959 const struct vnodeop_desc *a_desc; 960 struct vnode *a_dvp; 961 struct vnode *a_vp; 962 struct componentname *a_cnp; 963 } */ *ap = v; 964 int error; 965 966 PUFFS_VNREQ(rmdir); 967 968 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 969 puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp); 970 971 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR, 972 &rmdir_arg, sizeof(rmdir_arg), VPTOPNC(ap->a_dvp), 973 ap->a_dvp, ap->a_vp); 974 975 vput(ap->a_dvp); 976 vput(ap->a_vp); 977 978 return error; 979 } 980 981 int 982 puffs_link(void *v) 983 { 984 struct vop_link_args /* { 985 const struct vnodeop_desc *a_desc; 986 struct vnode *a_dvp; 987 struct vnode *a_vp; 988 struct componentname *a_cnp; 989 }*/ *ap = v; 990 int error; 991 992 PUFFS_VNREQ(link); 993 994 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 995 puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp); 996 997 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK, 998 &link_arg, sizeof(link_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 999 1000 vput(ap->a_dvp); 1001 1002 return error; 1003 } 1004 1005 int 1006 puffs_symlink(void *v) 1007 { 1008 struct vop_symlink_args /* { 1009 const struct vnodeop_desc *a_desc; 1010 struct vnode *a_dvp; 1011 struct vnode **a_vpp; 1012 struct componentname *a_cnp; 1013 struct vattr *a_vap; 1014 char *a_target; 1015 }*/ *ap = v; 1016 int error; 1017 1018 PUFFS_VNREQ(symlink); /* XXX: large structure */ 1019 1020 *ap->a_vpp = NULL; 1021 1022 puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp); 1023 symlink_arg.pvnr_va = *ap->a_vap; 1024 (void)strlcpy(symlink_arg.pvnr_link, ap->a_target, 1025 sizeof(symlink_arg.pvnr_link)); 1026 1027 /* XXX: don't need to relock parent */ 1028 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), 1029 PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg), 1030 VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1031 if (error) 1032 goto out; 1033 1034 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1035 symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0); 1036 1037 out: 1038 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1039 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1040 vput(ap->a_dvp); 1041 return error; 1042 } 1043 1044 int 1045 puffs_readlink(void *v) 1046 { 1047 struct vop_readlink_args /* { 1048 const struct vnodeop_desc *a_desc; 1049 struct vnode *a_vp; 1050 struct uio *a_uio; 1051 kauth_cred_t a_cred; 1052 } */ *ap = v; 1053 int error; 1054 1055 PUFFS_VNREQ(readlink); 1056 1057 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1058 readlink_arg.pvnr_linklen = sizeof(readlink_arg.pvnr_link); 1059 1060 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1061 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 1062 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1063 if (error) 1064 return error; 1065 1066 readlink_arg.pvnr_link[readlink_arg.pvnr_linklen] = '\0'; 1067 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1068 ap->a_uio); 1069 } 1070 1071 /* XXXXXXX: think about locking & userspace op delocking... */ 1072 int 1073 puffs_rename(void *v) 1074 { 1075 struct vop_rename_args /* { 1076 const struct vnodeop_desc *a_desc; 1077 struct vnode *a_fdvp; 1078 struct vnode *a_fvp; 1079 struct componentname *a_fcnp; 1080 struct vnode *a_tdvp; 1081 struct vnode *a_tvp; 1082 struct componentname *a_tcnp; 1083 }*/ *ap = v; 1084 int error; 1085 1086 PUFFS_VNREQ(rename); 1087 1088 /* 1089 * participate in the duck hunt 1090 * (I could do with some canard a la presse, so hopefully 1091 * this is succesful) 1092 */ 1093 KASSERT(ap->a_tdvp != ap->a_tvp); 1094 1095 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) { 1096 error = EXDEV; 1097 goto out; 1098 } 1099 1100 rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1101 rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1102 if (ap->a_tvp) 1103 rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1104 else 1105 rename_arg.pvnr_cookie_targ = NULL; 1106 puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp); 1107 puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp); 1108 1109 error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount), 1110 PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg), 1111 VPTOPNC(ap->a_fdvp), NULL, NULL); 1112 1113 out: 1114 vput(ap->a_tdvp); 1115 if (ap->a_tvp != NULL) 1116 vput(ap->a_tvp); 1117 1118 vrele(ap->a_fdvp); 1119 vrele(ap->a_fvp); 1120 1121 return error; 1122 } 1123 1124 int 1125 puffs_read(void *v) 1126 { 1127 struct vop_read_args /* { 1128 const struct vnodeop_desc *a_desc; 1129 struct vnode *a_vp; 1130 struct uio *a_uio; 1131 int a_ioflag; 1132 kauth_cred_t a_cred; 1133 } */ *ap = v; 1134 struct puffs_vnreq_read *read_argp; 1135 struct puffs_mount *pmp; 1136 struct vnode *vp; 1137 struct uio *uio; 1138 void *win; 1139 size_t tomove, argsize; 1140 vsize_t bytelen; 1141 int error, ubcflags; 1142 1143 uio = ap->a_uio; 1144 vp = ap->a_vp; 1145 read_argp = NULL; 1146 error = 0; 1147 pmp = MPTOPUFFSMP(vp->v_mount); 1148 1149 /* std sanity */ 1150 if (uio->uio_resid == 0) 1151 return 0; 1152 if (uio->uio_offset < 0) 1153 return EINVAL; 1154 1155 if (vp->v_type == VREG) { 1156 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1157 1158 ubcflags = 0; 1159 if (UBC_WANT_UNMAP(vp) || pmp->pmp_flags & PUFFSFLAG_NOCACHE) 1160 ubcflags = UBC_UNMAP; 1161 1162 /* XXX: first generation hack */ 1163 if (pmp->pmp_flags & PUFFSFLAG_NOCACHE) 1164 puffs_updatevpsize(vp); 1165 1166 while (uio->uio_resid > 0) { 1167 bytelen = MIN(uio->uio_resid, 1168 vp->v_size - uio->uio_offset); 1169 if (bytelen == 0) 1170 break; 1171 1172 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1173 &bytelen, advice, UBC_READ); 1174 error = uiomove(win, bytelen, uio); 1175 ubc_release(win, ubcflags); 1176 if (error) 1177 break; 1178 } 1179 1180 /* tell page cache to go flush itself */ 1181 if (pmp->pmp_flags & PUFFSFLAG_NOCACHE) { 1182 simple_lock(&vp->v_interlock); 1183 VOP_PUTPAGES(vp, 0, 0, 1184 PGO_ALLPAGES | PGO_FREE | PGO_SYNCIO); 1185 } 1186 1187 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1188 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1189 } else { 1190 #ifdef DIAGNOSTIC 1191 if (!(vp->v_type == VDIR || vp->v_type == VLNK)) 1192 panic("puffs_read: bad vnode type %d\n", vp->v_type); 1193 #endif 1194 /* 1195 * in case it's not a regular file, do it in the 1196 * old-fashioned style, i.e. explicit read without going 1197 * through the page cache. 1198 * 1199 * XXX: this path is not really tested now 1200 */ 1201 1202 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1203 argsize = sizeof(struct puffs_vnreq_read); 1204 read_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1205 1206 error = 0; 1207 while (uio->uio_resid > 0) { 1208 read_argp->pvnr_ioflag = ap->a_ioflag; 1209 read_argp->pvnr_resid = tomove; 1210 read_argp->pvnr_offset = uio->uio_offset; 1211 puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred); 1212 1213 argsize = sizeof(struct puffs_vnreq_read); 1214 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1215 (void **)&read_argp, &argsize, 1216 sizeof(struct puffs_vnreq_read), VPTOPNC(ap->a_vp), 1217 ap->a_vp, NULL); 1218 if (error) 1219 break; 1220 1221 if (read_argp->pvnr_resid > tomove) { 1222 error = EINVAL; 1223 break; 1224 } 1225 1226 error = uiomove(read_argp->pvnr_data, 1227 tomove - read_argp->pvnr_resid, uio); 1228 1229 /* 1230 * in case the file is out of juice, resid from 1231 * userspace is != 0. and the error-case is 1232 * quite obvious 1233 */ 1234 if (error || read_argp->pvnr_resid) 1235 break; 1236 1237 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1238 } 1239 } 1240 1241 if (read_argp) 1242 free(read_argp, M_PUFFS); 1243 return error; 1244 } 1245 1246 int 1247 puffs_write(void *v) 1248 { 1249 struct vop_write_args /* { 1250 const struct vnodeop_desc *a_desc; 1251 struct vnode *a_vp; 1252 struct uio *a_uio; 1253 int a_ioflag; 1254 kauth_cred_t a_cred; 1255 }*/ *ap = v; 1256 struct puffs_vnreq_write *write_argp; 1257 struct puffs_mount *pmp; 1258 struct uio *uio; 1259 struct vnode *vp; 1260 void *win; 1261 size_t tomove, argsize; 1262 off_t oldoff, newoff, origoff; 1263 vsize_t bytelen; 1264 int error, uflags, pflags; 1265 int async, ubcflags; 1266 1267 vp = ap->a_vp; 1268 uio = ap->a_uio; 1269 async = vp->v_mount->mnt_flag & MNT_ASYNC; 1270 error = uflags = 0; 1271 write_argp = NULL; 1272 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1273 1274 if (vp->v_type == VREG) { 1275 ubcflags = 0; 1276 if (UBC_WANT_UNMAP(vp) || pmp->pmp_flags & PUFFSFLAG_NOCACHE) 1277 ubcflags = UBC_UNMAP; 1278 1279 /* XXX: first generation hack */ 1280 if (pmp->pmp_flags & PUFFSFLAG_NOCACHE) 1281 puffs_updatevpsize(vp); 1282 1283 /* 1284 * userspace *should* be allowed to control this, 1285 * but with UBC it's a bit unclear how to handle it 1286 */ 1287 if (ap->a_ioflag & IO_APPEND) 1288 uio->uio_offset = vp->v_size; 1289 1290 origoff = uio->uio_offset; 1291 while (uio->uio_resid > 0) { 1292 uflags |= PUFFS_UPDATECTIME; 1293 uflags |= PUFFS_UPDATEMTIME; 1294 oldoff = uio->uio_offset; 1295 bytelen = uio->uio_resid; 1296 1297 win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, 1298 UVM_ADV_NORMAL, UBC_WRITE); 1299 error = uiomove(win, bytelen, uio); 1300 1301 /* 1302 * did we grow the file? 1303 * XXX: should probably ask userspace to extend 1304 * it's idea of the *first* before growing it 1305 * here. Or we need some mechanism to "rollback" 1306 * in case putpages fails. 1307 */ 1308 newoff = oldoff + bytelen; 1309 if (vp->v_size < newoff) { 1310 uflags |= PUFFS_UPDATESIZE; 1311 uvm_vnp_setsize(vp, newoff); 1312 1313 /* 1314 * in case we couldn't copy data to the 1315 * window, zero it out so that we don't 1316 * have any random leftovers in there. 1317 */ 1318 if (error) 1319 memset(win, 0, bytelen); 1320 } 1321 1322 ubc_release(win, ubcflags); 1323 if (error) 1324 break; 1325 1326 /* ok, I really need to admit: why's this? */ 1327 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 1328 simple_lock(&vp->v_interlock); 1329 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1330 uio->uio_offset & ~0xffff, PGO_CLEANIT); 1331 if (error) 1332 break; 1333 } 1334 } 1335 1336 pflags = 0; 1337 if (ap->a_ioflag & IO_SYNC) 1338 pflags |= PGO_CLEANIT | PGO_SYNCIO; 1339 if (pmp->pmp_flags & PUFFSFLAG_NOCACHE) 1340 pflags |= PGO_CLEANIT | PGO_SYNCIO | PGO_FREE; 1341 1342 if (error == 0 && pflags) { 1343 simple_lock(&vp->v_interlock); 1344 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1345 round_page(uio->uio_offset), pflags); 1346 } 1347 1348 puffs_updatenode(vp, uflags); 1349 } else { 1350 1351 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1352 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1353 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1354 1355 while (uio->uio_resid > 0) { 1356 write_argp->pvnr_ioflag = ap->a_ioflag; 1357 write_argp->pvnr_resid = tomove; 1358 write_argp->pvnr_offset = uio->uio_offset; 1359 puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred); 1360 error = uiomove(write_argp->pvnr_data, tomove, uio); 1361 if (error) 1362 break; 1363 1364 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1365 PUFFS_VN_WRITE, write_argp, argsize, 1366 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1367 if (error) { 1368 /* restore uiomove */ 1369 uio->uio_resid += tomove; 1370 uio->uio_offset -= tomove; 1371 break; 1372 } 1373 if (write_argp->pvnr_resid > tomove) { 1374 /* 1375 * XXX: correct file size is a mystery, 1376 * we can only guess 1377 */ 1378 error = EINVAL; 1379 break; 1380 } 1381 1382 /* adjust file size */ 1383 uvm_vnp_setsize(vp, uio->uio_offset); 1384 1385 /* didn't move everything? bad userspace. bail */ 1386 if (write_argp->pvnr_resid != 0) { 1387 uio->uio_resid += write_argp->pvnr_resid; 1388 uio->uio_offset -= write_argp->pvnr_resid; 1389 error = EIO; 1390 break; 1391 } 1392 1393 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1394 } 1395 } 1396 1397 if (write_argp) 1398 free(write_argp, M_PUFFS); 1399 return error; 1400 } 1401 1402 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1403 1404 #define FCNIOCTL_ARG_MAX 1<<16 1405 int 1406 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1407 { 1408 /* struct vop_ioctl_args { 1409 const struct vnodeop_desc *a_desc; 1410 struct vnode *a_vp; 1411 u_long a_command; 1412 void *a_data; 1413 int a_fflag; 1414 kauth_cred_t a_cred; 1415 struct lwp *a_l; 1416 }*ap = v; */ 1417 struct puffs_mount *pmp; 1418 struct puffs_sizepark pspark; 1419 void *kernbuf; 1420 size_t copylen; 1421 int error; 1422 1423 PUFFS_VNREQ(fcnioctl); 1424 1425 /* 1426 * Since this op gives the filesystem (almost) complete control on 1427 * how much it is allowed to copy from the calling process 1428 * address space, do not enable it by default, since it would 1429 * be a whopping security hole. 1430 */ 1431 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1432 if ((pmp->pmp_flags & PUFFSFLAG_ALLOWCTL) == 0) 1433 return EINVAL; /* only shoe that fits */ 1434 1435 /* fill in sizereq and store it */ 1436 pspark.pkso_reqid = puffs_getreqid(pmp); 1437 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1438 pspark.pkso_copybuf = ap->a_data; 1439 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1440 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1441 1442 /* then fill in actual request and shoot it off */ 1443 fcnioctl_arg.pvnr_command = ap->a_command; 1444 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1445 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1446 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1447 1448 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1449 &fcnioctl_arg, sizeof(fcnioctl_arg), VPTOPNC(ap->a_vp), 1450 pspark.pkso_reqid, NULL, NULL); 1451 1452 /* if we don't need to copy data, we're done */ 1453 if (error || !fcnioctl_arg.pvnr_copyback) 1454 return error; 1455 1456 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1457 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1458 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1459 if (error) 1460 goto out; 1461 error = copyout(kernbuf, ap->a_data, copylen); 1462 1463 out: 1464 free(kernbuf, M_PUFFS); 1465 return error; 1466 } 1467 1468 int 1469 puffs_ioctl(void *v) 1470 { 1471 1472 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1473 } 1474 1475 int 1476 puffs_fcntl(void *v) 1477 { 1478 1479 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1480 } 1481 1482 int 1483 puffs_print(void *v) 1484 { 1485 struct vop_print_args /* { 1486 struct vnode *a_vp; 1487 } */ *ap = v; 1488 struct vnode *vp = ap->a_vp; 1489 struct puffs_node *pn = vp->v_data; 1490 1491 PUFFS_VNREQ(print); 1492 1493 /* kernel portion */ 1494 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1495 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1496 if (vp->v_type == VFIFO) 1497 fifo_printinfo(vp); 1498 lockmgr_printinfo(&vp->v_lock); 1499 1500 /* userspace portion */ 1501 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_PRINT, 1502 &print_arg, sizeof(print_arg), VPTOPNC(ap->a_vp), 1503 LOCKEDVP(ap->a_vp), NULL); 1504 } 1505 1506 int 1507 puffs_pathconf(void *v) 1508 { 1509 struct vop_pathconf_args /* { 1510 const struct vnodeop_desc *a_desc; 1511 struct vnode *a_vp; 1512 int a_name; 1513 register_t *a_retval; 1514 } */ *ap = v; 1515 int error; 1516 1517 PUFFS_VNREQ(pathconf); 1518 1519 pathconf_arg.pvnr_name = ap->a_name; 1520 1521 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1522 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 1523 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1524 if (error) 1525 return error; 1526 1527 *ap->a_retval = pathconf_arg.pvnr_retval; 1528 1529 return 0; 1530 } 1531 1532 int 1533 puffs_advlock(void *v) 1534 { 1535 struct vop_advlock_args /* { 1536 const struct vnodeop_desc *a_desc; 1537 struct vnode *a_vp; 1538 void *a_id; 1539 int a_op; 1540 struct flock *a_fl; 1541 int a_flags; 1542 } */ *ap = v; 1543 int error; 1544 1545 PUFFS_VNREQ(advlock); 1546 1547 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1548 if (error) 1549 return error; 1550 advlock_arg.pvnr_id = ap->a_id; 1551 advlock_arg.pvnr_op = ap->a_op; 1552 advlock_arg.pvnr_flags = ap->a_flags; 1553 1554 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1555 &advlock_arg, sizeof(advlock_arg), VPTOPNC(ap->a_vp), NULL, NULL); 1556 } 1557 /* 1558 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1559 */ 1560 int 1561 puffs_strategy(void *v) 1562 { 1563 struct vop_strategy_args /* { 1564 const struct vnodeop_desc *a_desc; 1565 struct vnode *a_vp; 1566 struct buf *a_bp; 1567 } */ *ap = v; 1568 struct puffs_mount *pmp; 1569 struct puffs_vnreq_read *read_argp; 1570 struct puffs_vnreq_write *write_argp; 1571 struct buf *bp; 1572 size_t argsize; 1573 int error; 1574 1575 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1576 bp = ap->a_bp; 1577 1578 #ifdef DIAGNOSTIC 1579 if (bp->b_bcount > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1580 panic("puffs_strategy: wildly inappropriate buf bcount %d", 1581 bp->b_bcount); 1582 #endif 1583 1584 if (bp->b_flags & B_READ) { 1585 argsize = sizeof(struct puffs_vnreq_read); 1586 read_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1587 read_argp->pvnr_ioflag = 0; 1588 read_argp->pvnr_resid = bp->b_bcount; 1589 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1590 /* XXX: puffs_credcvt */ 1591 1592 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1593 (void **)&read_argp, &argsize, argsize, 1594 VPTOPNC(ap->a_vp), LOCKEDVP(ap->a_vp), NULL); 1595 1596 /* XXX */ 1597 if (error) 1598 printf("virhe %d\n", error); 1599 1600 /* XXX */ 1601 bp->b_resid = read_argp->pvnr_resid; 1602 (void)memcpy(bp->b_data, read_argp->pvnr_data, bp->b_bcount); 1603 free(read_argp, M_PUFFS); 1604 } else { 1605 argsize = sizeof(struct puffs_vnreq_write) + bp->b_bcount; 1606 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1607 write_argp->pvnr_ioflag = 0; 1608 write_argp->pvnr_resid = bp->b_bcount; 1609 write_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1610 /* XXX, stupid */ 1611 (void)memcpy(&write_argp->pvnr_data, bp->b_data, bp->b_bcount); 1612 1613 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1614 PUFFS_VN_WRITE, write_argp, argsize, 1615 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1616 if (error) 1617 goto out; 1618 1619 bp->b_resid = write_argp->pvnr_resid; 1620 1621 /* XXX: if any of the following trigger, we're in trouble */ 1622 1623 /* check 1 */ 1624 if (write_argp->pvnr_resid != 0) 1625 error = EIO; 1626 1627 /* check 2 */ 1628 if (write_argp->pvnr_resid > bp->b_bcount) 1629 error = EINVAL; 1630 } 1631 1632 out: 1633 biodone(ap->a_bp); 1634 return error; 1635 } 1636 1637 /* 1638 * The rest don't get a free trip to userspace and back, they 1639 * have to stay within the kernel. 1640 */ 1641 1642 /* 1643 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 1644 * well, maybe somehow, somewhere, some day .... 1645 */ 1646 int 1647 puffs_bmap(void *v) 1648 { 1649 struct vop_bmap_args /* { 1650 const struct vnodeop_desc *a_desc; 1651 struct vnode *a_vp; 1652 daddr_t a_bn; 1653 struct vnode **a_vpp; 1654 daddr_t *a_bnp; 1655 int *a_runp; 1656 } */ *ap = v; 1657 struct puffs_mount *pmp; 1658 1659 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1660 1661 if (ap->a_vpp) 1662 *ap->a_vpp = ap->a_vp; 1663 if (ap->a_bnp) 1664 *ap->a_bnp = ap->a_bn; 1665 if (ap->a_runp) 1666 *ap->a_runp = pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX; 1667 1668 return 0; 1669 } 1670 1671 /* 1672 * moreXXX: yes, todo 1673 */ 1674 int 1675 puffs_lock(void *v) 1676 { 1677 struct vop_lock_args /* { 1678 struct vnode *a_vp; 1679 int a_flags; 1680 }*/ *ap = v; 1681 struct vnode *vp = ap->a_vp; 1682 1683 #if 0 1684 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1685 #endif 1686 1687 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 1688 } 1689 1690 int 1691 puffs_unlock(void *v) 1692 { 1693 struct vop_unlock_args /* { 1694 struct vnode *a_vp; 1695 int a_flags; 1696 } */ *ap = v; 1697 struct vnode *vp = ap->a_vp; 1698 1699 #if 0 1700 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1701 #endif 1702 1703 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 1704 } 1705 1706 int 1707 puffs_islocked(void *v) 1708 { 1709 struct vop_islocked_args *ap = v; 1710 int rv; 1711 1712 rv = lockstatus(&ap->a_vp->v_lock); 1713 return rv; 1714 } 1715 1716 int 1717 puffs_generic(void *v) 1718 { 1719 struct vop_generic_args *ap = v; 1720 1721 (void)ap; 1722 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 1723 1724 return EOPNOTSUPP; 1725 } 1726
Indexes created Mon Sep 29 21:09:56 GMT 2025