puffs_vnops.c revision 1.65
1 /* $NetBSD: puffs_vnops.c,v 1.65 2007/05/06 19:43:14 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006, 2007 Antti Kantee. All Rights Reserved. 5 * 6 * Development of this software was supported by the 7 * Google Summer of Code program and the Ulla Tuominen Foundation. 8 * The Google SoC project was mentored by Bill Studenmund. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 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 1.65 2007/05/06 19:43:14 pooka Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/fstrans.h> 40 #include <sys/malloc.h> 41 #include <sys/mount.h> 42 #include <sys/namei.h> 43 #include <sys/vnode.h> 44 #include <uvm/uvm.h> 45 46 #include <fs/puffs/puffs_msgif.h> 47 #include <fs/puffs/puffs_sys.h> 48 49 #include <miscfs/fifofs/fifo.h> 50 #include <miscfs/genfs/genfs.h> 51 #include <miscfs/specfs/specdev.h> 52 53 int puffs_lookup(void *); 54 int puffs_create(void *); 55 int puffs_access(void *); 56 int puffs_mknod(void *); 57 int puffs_open(void *); 58 int puffs_close(void *); 59 int puffs_getattr(void *); 60 int puffs_setattr(void *); 61 int puffs_reclaim(void *); 62 int puffs_readdir(void *); 63 int puffs_poll(void *); 64 int puffs_fsync(void *); 65 int puffs_seek(void *); 66 int puffs_remove(void *); 67 int puffs_mkdir(void *); 68 int puffs_rmdir(void *); 69 int puffs_link(void *); 70 int puffs_readlink(void *); 71 int puffs_symlink(void *); 72 int puffs_rename(void *); 73 int puffs_read(void *); 74 int puffs_write(void *); 75 int puffs_fcntl(void *); 76 int puffs_ioctl(void *); 77 int puffs_inactive(void *); 78 int puffs_print(void *); 79 int puffs_pathconf(void *); 80 int puffs_advlock(void *); 81 int puffs_strategy(void *); 82 int puffs_bmap(void *); 83 int puffs_mmap(void *); 84 int puffs_getpages(void *); 85 86 int puffs_spec_read(void *); 87 int puffs_spec_write(void *); 88 int puffs_fifo_read(void *); 89 int puffs_fifo_write(void *); 90 91 int puffs_checkop(void *); 92 93 94 /* VOP_LEASE() not included */ 95 96 int puffs_generic(void *); 97 98 #if 0 99 #define puffs_lock genfs_lock 100 #define puffs_unlock genfs_unlock 101 #define puffs_islocked genfs_islocked 102 #else 103 int puffs_lock(void *); 104 int puffs_unlock(void *); 105 int puffs_islocked(void *); 106 #endif 107 108 int (**puffs_vnodeop_p)(void *); 109 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 110 { &vop_default_desc, vn_default_error }, 111 { &vop_lookup_desc, puffs_lookup }, /* REAL lookup */ 112 { &vop_create_desc, puffs_checkop }, /* create */ 113 { &vop_mknod_desc, puffs_checkop }, /* mknod */ 114 { &vop_open_desc, puffs_open }, /* REAL open */ 115 { &vop_close_desc, puffs_checkop }, /* close */ 116 { &vop_access_desc, puffs_access }, /* REAL access */ 117 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 118 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 119 { &vop_read_desc, puffs_checkop }, /* read */ 120 { &vop_write_desc, puffs_checkop }, /* write */ 121 { &vop_fcntl_desc, puffs_checkop }, /* fcntl */ 122 { &vop_ioctl_desc, puffs_checkop }, /* ioctl */ 123 { &vop_fsync_desc, puffs_fsync }, /* REAL fsync */ 124 { &vop_seek_desc, puffs_checkop }, /* seek */ 125 { &vop_remove_desc, puffs_checkop }, /* remove */ 126 { &vop_link_desc, puffs_checkop }, /* link */ 127 { &vop_rename_desc, puffs_checkop }, /* rename */ 128 { &vop_mkdir_desc, puffs_checkop }, /* mkdir */ 129 { &vop_rmdir_desc, puffs_checkop }, /* rmdir */ 130 { &vop_symlink_desc, puffs_checkop }, /* symlink */ 131 { &vop_readdir_desc, puffs_checkop }, /* readdir */ 132 { &vop_readlink_desc, puffs_checkop }, /* readlink */ 133 { &vop_getpages_desc, puffs_checkop }, /* getpages */ 134 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 135 { &vop_pathconf_desc, puffs_checkop }, /* pathconf */ 136 { &vop_advlock_desc, puffs_checkop }, /* advlock */ 137 { &vop_strategy_desc, puffs_strategy }, /* REAL strategy */ 138 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 139 { &vop_abortop_desc, genfs_abortop }, /* REAL abortop */ 140 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 141 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 142 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 143 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 144 { &vop_bmap_desc, puffs_bmap }, /* REAL bmap */ 145 { &vop_print_desc, puffs_print }, /* REAL print */ 146 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 147 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 148 { &vop_mmap_desc, puffs_mmap }, /* REAL mmap */ 149 150 { &vop_poll_desc, genfs_eopnotsupp }, /* poll XXX */ 151 { &vop_poll_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 152 { NULL, NULL } 153 }; 154 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 155 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 156 157 158 int (**puffs_specop_p)(void *); 159 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 160 { &vop_default_desc, vn_default_error }, 161 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 162 { &vop_create_desc, spec_create }, /* genfs_badop */ 163 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 164 { &vop_open_desc, spec_open }, /* spec_open */ 165 { &vop_close_desc, spec_close }, /* spec_close */ 166 { &vop_access_desc, puffs_checkop }, /* access */ 167 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 168 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 169 { &vop_read_desc, puffs_spec_read }, /* update, read */ 170 { &vop_write_desc, puffs_spec_write }, /* update, write */ 171 { &vop_lease_desc, spec_lease_check }, /* genfs_nullop */ 172 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 173 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 174 { &vop_poll_desc, spec_poll }, /* spec_poll */ 175 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 176 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 177 { &vop_mmap_desc, spec_mmap }, /* genfs_mmap (dummy) */ 178 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 179 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 180 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 181 { &vop_link_desc, spec_link }, /* genfs_badop */ 182 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 183 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 184 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 185 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 186 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 187 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 188 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 189 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 190 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 191 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 192 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 193 { &vop_bmap_desc, spec_bmap }, /* dummy */ 194 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 195 { &vop_print_desc, puffs_print }, /* REAL print */ 196 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 197 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 198 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 199 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 200 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 201 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 202 #if 0 203 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 204 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 205 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 206 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 207 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 208 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 209 #endif 210 { NULL, NULL } 211 }; 212 const struct vnodeopv_desc puffs_specop_opv_desc = 213 { &puffs_specop_p, puffs_specop_entries }; 214 215 216 int (**puffs_fifoop_p)(void *); 217 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 218 { &vop_default_desc, vn_default_error }, 219 { &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */ 220 { &vop_create_desc, fifo_create }, /* genfs_badop */ 221 { &vop_mknod_desc, fifo_mknod }, /* genfs_badop */ 222 { &vop_open_desc, fifo_open }, /* open */ 223 { &vop_close_desc, fifo_close }, /* close */ 224 { &vop_access_desc, puffs_checkop }, /* access */ 225 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 226 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 227 { &vop_read_desc, puffs_fifo_read }, /* read, update */ 228 { &vop_write_desc, puffs_fifo_write }, /* write, update */ 229 { &vop_lease_desc, fifo_lease_check }, /* genfs_nullop */ 230 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 231 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 232 { &vop_poll_desc, fifo_poll }, /* poll */ 233 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 234 { &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */ 235 { &vop_mmap_desc, fifo_mmap }, /* genfs_badop */ 236 { &vop_fsync_desc, fifo_fsync }, /* genfs_nullop*/ 237 { &vop_seek_desc, fifo_seek }, /* genfs_badop */ 238 { &vop_remove_desc, fifo_remove }, /* genfs_badop */ 239 { &vop_link_desc, fifo_link }, /* genfs_badop */ 240 { &vop_rename_desc, fifo_rename }, /* genfs_badop */ 241 { &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */ 242 { &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */ 243 { &vop_symlink_desc, fifo_symlink }, /* genfs_badop */ 244 { &vop_readdir_desc, fifo_readdir }, /* genfs_badop */ 245 { &vop_readlink_desc, fifo_readlink }, /* genfs_badop */ 246 { &vop_abortop_desc, fifo_abortop }, /* genfs_badop */ 247 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 248 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 249 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 250 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 251 { &vop_bmap_desc, fifo_bmap }, /* dummy */ 252 { &vop_strategy_desc, fifo_strategy }, /* genfs_badop */ 253 { &vop_print_desc, puffs_print }, /* REAL print */ 254 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 255 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 256 { &vop_advlock_desc, fifo_advlock }, /* genfs_einval */ 257 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 258 { &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/ 259 #if 0 260 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 261 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 262 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 263 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 264 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 265 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 266 #endif 267 { NULL, NULL } 268 }; 269 const struct vnodeopv_desc puffs_fifoop_opv_desc = 270 { &puffs_fifoop_p, puffs_fifoop_entries }; 271 272 273 /* "real" vnode operations */ 274 int (**puffs_msgop_p)(void *); 275 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 276 { &vop_default_desc, vn_default_error }, 277 { &vop_create_desc, puffs_create }, /* create */ 278 { &vop_mknod_desc, puffs_mknod }, /* mknod */ 279 { &vop_open_desc, puffs_open }, /* open */ 280 { &vop_close_desc, puffs_close }, /* close */ 281 { &vop_access_desc, puffs_access }, /* access */ 282 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 283 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 284 { &vop_read_desc, puffs_read }, /* read */ 285 { &vop_write_desc, puffs_write }, /* write */ 286 { &vop_fcntl_desc, puffs_fcntl }, /* fcntl */ 287 { &vop_ioctl_desc, puffs_ioctl }, /* ioctl */ 288 { &vop_seek_desc, puffs_seek }, /* seek */ 289 { &vop_remove_desc, puffs_remove }, /* remove */ 290 { &vop_link_desc, puffs_link }, /* link */ 291 { &vop_rename_desc, puffs_rename }, /* rename */ 292 { &vop_mkdir_desc, puffs_mkdir }, /* mkdir */ 293 { &vop_rmdir_desc, puffs_rmdir }, /* rmdir */ 294 { &vop_symlink_desc, puffs_symlink }, /* symlink */ 295 { &vop_readdir_desc, puffs_readdir }, /* readdir */ 296 { &vop_readlink_desc, puffs_readlink }, /* readlink */ 297 { &vop_print_desc, puffs_print }, /* print */ 298 { &vop_islocked_desc, puffs_islocked }, /* islocked */ 299 { &vop_pathconf_desc, puffs_pathconf }, /* pathconf */ 300 { &vop_advlock_desc, puffs_advlock }, /* advlock */ 301 { &vop_getpages_desc, puffs_getpages }, /* getpages */ 302 { NULL, NULL } 303 }; 304 const struct vnodeopv_desc puffs_msgop_opv_desc = 305 { &puffs_msgop_p, puffs_msgop_entries }; 306 307 308 #define LOCKEDVP(a) (VOP_ISLOCKED(a) ? (a) : NULL) 309 310 311 /* 312 * This is a generic vnode operation handler. It checks if the necessary 313 * operations for the called vnode operation are implemented by userspace 314 * and either returns a dummy return value or proceeds to call the real 315 * vnode operation from puffs_msgop_v. 316 * 317 * XXX: this should described elsewhere and autogenerated, the complexity 318 * of the vnode operations vectors and their interrelationships is also 319 * getting a bit out of hand. Another problem is that we need this same 320 * information in the fs server code, so keeping the two in sync manually 321 * is not a viable (long term) plan. 322 */ 323 324 /* not supported, handle locking protocol */ 325 #define CHECKOP_NOTSUPP(op) \ 326 case VOP_##op##_DESCOFFSET: \ 327 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 328 return genfs_eopnotsupp(v); \ 329 break 330 331 /* always succeed, no locking */ 332 #define CHECKOP_SUCCESS(op) \ 333 case VOP_##op##_DESCOFFSET: \ 334 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 335 return 0; \ 336 break 337 338 int 339 puffs_checkop(void *v) 340 { 341 struct vop_generic_args /* { 342 struct vnodeop_desc *a_desc; 343 spooky mystery contents; 344 } */ *ap = v; 345 struct vnodeop_desc *desc = ap->a_desc; 346 struct puffs_mount *pmp; 347 struct vnode *vp; 348 int offset; 349 350 DPRINTF_VERBOSE(("checkop call %s (%d)\n", 351 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset)); 352 353 offset = ap->a_desc->vdesc_vp_offsets[0]; 354 #ifdef DIAGNOSTIC 355 if (offset == VDESC_NO_OFFSET) 356 panic("puffs_checkop: no vnode, why did you call me?"); 357 #endif 358 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 359 pmp = MPTOPUFFSMP(vp->v_mount); 360 361 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOPS) == 0) { 362 switch (desc->vdesc_offset) { 363 CHECKOP_NOTSUPP(CREATE); 364 CHECKOP_NOTSUPP(MKNOD); 365 CHECKOP_NOTSUPP(GETATTR); 366 CHECKOP_NOTSUPP(SETATTR); 367 CHECKOP_NOTSUPP(READ); 368 CHECKOP_NOTSUPP(WRITE); 369 CHECKOP_NOTSUPP(FCNTL); 370 CHECKOP_NOTSUPP(IOCTL); 371 CHECKOP_NOTSUPP(REMOVE); 372 CHECKOP_NOTSUPP(LINK); 373 CHECKOP_NOTSUPP(RENAME); 374 CHECKOP_NOTSUPP(MKDIR); 375 CHECKOP_NOTSUPP(RMDIR); 376 CHECKOP_NOTSUPP(SYMLINK); 377 CHECKOP_NOTSUPP(READDIR); 378 CHECKOP_NOTSUPP(READLINK); 379 CHECKOP_NOTSUPP(PRINT); 380 CHECKOP_NOTSUPP(PATHCONF); 381 CHECKOP_NOTSUPP(ADVLOCK); 382 383 CHECKOP_SUCCESS(ACCESS); 384 CHECKOP_SUCCESS(CLOSE); 385 CHECKOP_SUCCESS(SEEK); 386 387 case VOP_GETPAGES_DESCOFFSET: 388 if (!EXISTSOP(pmp, READ)) 389 return genfs_eopnotsupp(v); 390 break; 391 392 default: 393 panic("puffs_checkop: unhandled vnop %d", 394 desc->vdesc_offset); 395 } 396 } 397 398 return VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 399 } 400 401 402 int 403 puffs_lookup(void *v) 404 { 405 struct vop_lookup_args /* { 406 const struct vnodeop_desc *a_desc; 407 struct vnode *a_dvp; 408 struct vnode **a_vpp; 409 struct componentname *a_cnp; 410 } */ *ap = v; 411 struct puffs_mount *pmp; 412 struct componentname *cnp; 413 struct vnode *vp, *dvp; 414 struct puffs_node *dpn; 415 int isdot; 416 int error; 417 418 PUFFS_VNREQ(lookup); 419 420 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 421 cnp = ap->a_cnp; 422 dvp = ap->a_dvp; 423 *ap->a_vpp = NULL; 424 425 /* first things first: check access */ 426 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 427 if (error) 428 return error; 429 430 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 431 432 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %lx\n", 433 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 434 435 /* 436 * Check if someone fed it into the cache 437 */ 438 if (PUFFS_DOCACHE(pmp)) { 439 error = cache_lookup(dvp, ap->a_vpp, cnp); 440 441 if (error >= 0) 442 return error; 443 } 444 445 if (isdot) { 446 vp = ap->a_dvp; 447 vref(vp); 448 *ap->a_vpp = vp; 449 return 0; 450 } 451 452 puffs_makecn(&lookup_arg.pvnr_cn, cnp); 453 454 if (cnp->cn_flags & ISDOTDOT) 455 VOP_UNLOCK(dvp, 0); 456 457 error = puffs_vntouser(pmp, PUFFS_VN_LOOKUP, 458 &lookup_arg, sizeof(lookup_arg), 0, VPTOPNC(dvp), 459 LOCKEDVP(dvp), NULL); 460 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 461 462 /* 463 * In case of error, there is no new vnode to play with, so be 464 * happy with the NULL value given to vpp in the beginning. 465 * Also, check if this really was an error or the target was not 466 * present. Either treat it as a non-error for CREATE/RENAME or 467 * enter the component into the negative name cache (if desired). 468 */ 469 if (error) { 470 if (error == ENOENT) { 471 if ((cnp->cn_flags & ISLASTCN) 472 && (cnp->cn_nameiop == CREATE 473 || cnp->cn_nameiop == RENAME)) { 474 cnp->cn_flags |= SAVENAME; 475 error = EJUSTRETURN; 476 } else { 477 if ((cnp->cn_flags & MAKEENTRY) 478 && PUFFS_DOCACHE(pmp)) 479 cache_enter(dvp, NULL, cnp); 480 } 481 } else if (error < 0) { 482 error = EINVAL; 483 } 484 goto errout; 485 } 486 487 /* 488 * Check that we don't get our parent node back, that would cause 489 * a pretty obvious deadlock. 490 */ 491 dpn = dvp->v_data; 492 if (lookup_arg.pvnr_newnode == dpn->pn_cookie) { 493 error = EINVAL; 494 goto errout; 495 } 496 497 /* XXX: race here */ 498 /* XXX2: this check for node existence twice */ 499 vp = puffs_pnode2vnode(pmp, lookup_arg.pvnr_newnode, 1); 500 if (!vp) { 501 error = puffs_getvnode(dvp->v_mount, 502 lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype, 503 lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp); 504 if (error) { 505 goto errout; 506 } 507 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 508 } 509 *ap->a_vpp = vp; 510 511 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_DOCACHE(pmp)) 512 cache_enter(dvp, vp, cnp); 513 514 errout: 515 if (cnp->cn_flags & ISDOTDOT) 516 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 517 518 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 519 return error; 520 } 521 522 int 523 puffs_create(void *v) 524 { 525 struct vop_create_args /* { 526 const struct vnodeop_desc *a_desc; 527 struct vnode *a_dvp; 528 struct vnode **a_vpp; 529 struct componentname *a_cnp; 530 struct vattr *a_vap; 531 } */ *ap = v; 532 int error; 533 534 PUFFS_VNREQ(create); 535 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 536 ap->a_dvp, ap->a_cnp->cn_nameptr)); 537 538 puffs_makecn(&create_arg.pvnr_cn, ap->a_cnp); 539 create_arg.pvnr_va = *ap->a_vap; 540 541 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_CREATE, 542 &create_arg, sizeof(create_arg), 0, VPTOPNC(ap->a_dvp), 543 ap->a_dvp, NULL); 544 if (error) 545 goto out; 546 547 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 548 create_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 0); 549 /* XXX: in case of error, need to uncommit userspace transaction */ 550 551 out: 552 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 553 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 554 vput(ap->a_dvp); 555 556 DPRINTF(("puffs_create: return %d\n", error)); 557 return error; 558 } 559 560 int 561 puffs_mknod(void *v) 562 { 563 struct vop_mknod_args /* { 564 const struct vnodeop_desc *a_desc; 565 struct vnode *a_dvp; 566 struct vnode **a_vpp; 567 struct componentname *a_cnp; 568 struct vattr *a_vap; 569 } */ *ap = v; 570 int error; 571 572 PUFFS_VNREQ(mknod); 573 574 puffs_makecn(&mknod_arg.pvnr_cn, ap->a_cnp); 575 mknod_arg.pvnr_va = *ap->a_vap; 576 577 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKNOD, 578 &mknod_arg, sizeof(mknod_arg), 0, VPTOPNC(ap->a_dvp), 579 ap->a_dvp, NULL); 580 if (error) 581 goto out; 582 583 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 584 mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 585 ap->a_vap->va_rdev); 586 587 out: 588 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 589 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 590 vput(ap->a_dvp); 591 return error; 592 } 593 594 int 595 puffs_open(void *v) 596 { 597 struct vop_open_args /* { 598 const struct vnodeop_desc *a_desc; 599 struct vnode *a_vp; 600 int a_mode; 601 kauth_cred_t a_cred; 602 struct lwp *a_l; 603 } */ *ap = v; 604 struct vnode *vp = ap->a_vp; 605 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 606 int mode = ap->a_mode; 607 int rv; 608 609 PUFFS_VNREQ(open); 610 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 611 612 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) { 613 rv = EROFS; 614 goto out; 615 } 616 617 if (!EXISTSOP(pmp, OPEN)) { 618 rv = 0; 619 goto out; 620 } 621 622 open_arg.pvnr_mode = mode; 623 puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred); 624 open_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 625 626 rv = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_OPEN, 627 &open_arg, sizeof(open_arg), 0, VPTOPNC(vp), vp, NULL); 628 629 out: 630 DPRINTF(("puffs_open: returning %d\n", rv)); 631 return rv; 632 } 633 634 int 635 puffs_close(void *v) 636 { 637 struct vop_close_args /* { 638 const struct vnodeop_desc *a_desc; 639 struct vnode *a_vp; 640 int a_fflag; 641 kauth_cred_t a_cred; 642 struct lwp *a_l; 643 } */ *ap = v; 644 struct puffs_vnreq_close *close_argp; 645 646 close_argp = malloc(sizeof(struct puffs_vnreq_close), 647 M_PUFFS, M_WAITOK | M_ZERO); 648 close_argp->pvnr_fflag = ap->a_fflag; 649 puffs_credcvt(&close_argp->pvnr_cred, ap->a_cred); 650 close_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 651 652 puffs_vntouser_faf(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 653 close_argp, sizeof(struct puffs_vnreq_close), VPTOPNC(ap->a_vp)); 654 655 return 0; 656 } 657 658 int 659 puffs_access(void *v) 660 { 661 struct vop_access_args /* { 662 const struct vnodeop_desc *a_desc; 663 struct vnode *a_vp; 664 int a_mode; 665 kauth_cred_t a_cred; 666 struct lwp *a_l; 667 } */ *ap = v; 668 struct vnode *vp = ap->a_vp; 669 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 670 int mode = ap->a_mode; 671 672 PUFFS_VNREQ(access); 673 674 if (vp->v_type == VREG && mode & VWRITE && !EXISTSOP(pmp, WRITE)) 675 return EROFS; 676 677 if (!EXISTSOP(pmp, ACCESS)) 678 return 0; 679 680 access_arg.pvnr_mode = ap->a_mode; 681 access_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 682 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 683 684 return puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_ACCESS, 685 &access_arg, sizeof(access_arg), 0, VPTOPNC(vp), vp, NULL); 686 } 687 688 int 689 puffs_getattr(void *v) 690 { 691 struct vop_getattr_args /* { 692 const struct vnodeop_desc *a_desc; 693 struct vnode *a_vp; 694 struct vattr *a_vap; 695 kauth_cred_t a_cred; 696 struct lwp *a_l; 697 } */ *ap = v; 698 struct mount *mp; 699 struct vnode *vp; 700 struct vattr *vap; 701 struct puffs_node *pn; 702 int error; 703 704 PUFFS_VNREQ(getattr); 705 706 vp = ap->a_vp; 707 mp = vp->v_mount; 708 vap = ap->a_vap; 709 710 vattr_null(&getattr_arg.pvnr_va); 711 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 712 getattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 713 714 /* 715 * XXX + XX (dos equis): this can't go through the unlock/lock 716 * cycle, since it can be called from uvn_attach(), which fiddles 717 * around with VXLOCK and therefore breaks vn_lock(). Proper 718 * fix pending. 719 */ 720 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_GETATTR, 721 &getattr_arg, sizeof(getattr_arg), 0, VPTOPNC(vp), 722 NULL /* XXXseeabove: should be LOCKEDVP(vp) */, NULL); 723 if (error) 724 return error; 725 726 (void) memcpy(vap, &getattr_arg.pvnr_va, sizeof(struct vattr)); 727 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 728 729 pn = VPTOPP(vp); 730 if (pn->pn_stat & PNODE_METACACHE_ATIME) 731 vap->va_atime = pn->pn_mc_atime; 732 if (pn->pn_stat & PNODE_METACACHE_CTIME) 733 vap->va_ctime = pn->pn_mc_ctime; 734 if (pn->pn_stat & PNODE_METACACHE_MTIME) 735 vap->va_mtime = pn->pn_mc_mtime; 736 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 737 vap->va_size = pn->pn_mc_size; 738 } else { 739 if (getattr_arg.pvnr_va.va_size != VNOVAL) 740 uvm_vnp_setsize(vp, getattr_arg.pvnr_va.va_size); 741 } 742 743 return 0; 744 } 745 746 int 747 puffs_setattr(void *v) 748 { 749 struct vop_getattr_args /* { 750 const struct vnodeop_desc *a_desc; 751 struct vnode *a_vp; 752 struct vattr *a_vap; 753 kauth_cred_t a_cred; 754 struct lwp *a_l; 755 } */ *ap = v; 756 int error; 757 struct vattr *vap = ap->a_vap; 758 struct puffs_node *pn = ap->a_vp->v_data; 759 760 PUFFS_VNREQ(setattr); 761 762 /* 763 * Flush metacache first. If we are called with some explicit 764 * parameters, treat them as information overriding metacache 765 * information. 766 */ 767 if (pn->pn_stat & PNODE_METACACHE_MASK) { 768 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 769 && vap->va_atime.tv_sec == VNOVAL) 770 vap->va_atime = pn->pn_mc_atime; 771 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 772 && vap->va_ctime.tv_sec == VNOVAL) 773 vap->va_ctime = pn->pn_mc_ctime; 774 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 775 && vap->va_mtime.tv_sec == VNOVAL) 776 vap->va_mtime = pn->pn_mc_mtime; 777 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 778 && vap->va_size == VNOVAL) 779 vap->va_size = pn->pn_mc_size; 780 781 pn->pn_stat &= ~PNODE_METACACHE_MASK; 782 } 783 784 (void)memcpy(&setattr_arg.pvnr_va, vap, sizeof(struct vattr)); 785 puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred); 786 setattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 787 788 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR, 789 &setattr_arg, sizeof(setattr_arg), 0, VPTOPNC(ap->a_vp), 790 ap->a_vp, NULL); 791 if (error) 792 return error; 793 794 if (vap->va_size != VNOVAL) 795 uvm_vnp_setsize(ap->a_vp, vap->va_size); 796 797 return 0; 798 } 799 800 int 801 puffs_inactive(void *v) 802 { 803 struct vop_inactive_args /* { 804 const struct vnodeop_desc *a_desc; 805 struct vnode *a_vp; 806 struct lwp *a_l; 807 } */ *ap = v; 808 struct puffs_mount *pmp; 809 struct puffs_node *pnode; 810 int rv, vnrefs; 811 812 PUFFS_VNREQ(inactive); 813 814 /* 815 * XXX: think about this after we really start unlocking 816 * when going to userspace 817 */ 818 pnode = ap->a_vp->v_data; 819 820 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 821 822 inactive_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 823 824 if (EXISTSOP(pmp, INACTIVE)) 825 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 826 &inactive_arg, sizeof(inactive_arg), 0, VPTOPNC(ap->a_vp), 827 ap->a_vp, NULL); 828 else 829 rv = 1; /* see below */ 830 831 /* can't trust userspace return value? simulate safe answer */ 832 if (rv) 833 vnrefs = 1; 834 else 835 vnrefs = inactive_arg.pvnr_backendrefs; 836 837 VOP_UNLOCK(ap->a_vp, 0); 838 839 /* 840 * user server thinks it's gone? then don't be afraid care, 841 * node's life was already all it would ever be 842 */ 843 if (vnrefs == 0) { 844 pnode->pn_stat |= PNODE_NOREFS; 845 vrecycle(ap->a_vp, NULL, ap->a_l); 846 } 847 848 return 0; 849 } 850 851 /* 852 * always FAF, we don't really care if the server wants to fail to 853 * reclaim the node or not 854 */ 855 int 856 puffs_reclaim(void *v) 857 { 858 struct vop_reclaim_args /* { 859 const struct vnodeop_desc *a_desc; 860 struct vnode *a_vp; 861 struct lwp *a_l; 862 } */ *ap = v; 863 struct puffs_mount *pmp; 864 struct puffs_vnreq_reclaim *reclaim_argp; 865 866 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 867 868 /* 869 * first things first: check if someone is trying to reclaim the 870 * root vnode. do not allow that to travel to userspace. 871 * Note that we don't need to take the lock similarly to 872 * puffs_root(), since there is only one of us. 873 */ 874 if (ap->a_vp->v_flag & VROOT) { 875 mutex_enter(&pmp->pmp_lock); 876 KASSERT(pmp->pmp_root != NULL); 877 pmp->pmp_root = NULL; 878 mutex_exit(&pmp->pmp_lock); 879 goto out; 880 } 881 882 if (!EXISTSOP(pmp, RECLAIM)) 883 goto out; 884 885 reclaim_argp = malloc(sizeof(struct puffs_vnreq_reclaim), 886 M_PUFFS, M_WAITOK | M_ZERO); 887 reclaim_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 888 889 puffs_vntouser_faf(pmp, PUFFS_VN_RECLAIM, 890 reclaim_argp, sizeof(struct puffs_vnreq_reclaim), 891 VPTOPNC(ap->a_vp)); 892 893 out: 894 if (PUFFS_DOCACHE(pmp)) 895 cache_purge(ap->a_vp); 896 puffs_putvnode(ap->a_vp); 897 898 return 0; 899 } 900 901 #define CSIZE sizeof(**ap->a_cookies) 902 int 903 puffs_readdir(void *v) 904 { 905 struct vop_readdir_args /* { 906 const struct vnodeop_desc *a_desc; 907 struct vnode *a_vp; 908 struct uio *a_uio; 909 kauth_cred_t a_cred; 910 int *a_eofflag; 911 off_t **a_cookies; 912 int *a_ncookies; 913 } */ *ap = v; 914 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 915 struct puffs_vnreq_readdir *readdir_argp; 916 size_t argsize, tomove, cookiemem, cookiesmax; 917 struct uio *uio = ap->a_uio; 918 size_t howmuch; 919 int error; 920 921 if (ap->a_cookies) { 922 KASSERT(ap->a_ncookies != NULL); 923 if (pmp->pmp_args.pa_fhsize == 0) 924 return EOPNOTSUPP; 925 cookiesmax = uio->uio_resid/_DIRENT_MINSIZE((struct dirent *)0); 926 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 927 } else { 928 cookiesmax = 0; 929 cookiemem = 0; 930 } 931 932 argsize = sizeof(struct puffs_vnreq_readdir); 933 tomove = uio->uio_resid + cookiemem; 934 readdir_argp = malloc(argsize + tomove, M_PUFFS, M_ZERO | M_WAITOK); 935 936 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 937 readdir_argp->pvnr_offset = uio->uio_offset; 938 readdir_argp->pvnr_resid = uio->uio_resid; 939 readdir_argp->pvnr_ncookies = cookiesmax; 940 readdir_argp->pvnr_eofflag = 0; 941 readdir_argp->pvnr_dentoff = cookiemem; 942 943 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 944 PUFFS_VN_READDIR, readdir_argp, argsize, tomove, 945 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 946 if (error) 947 goto out; 948 949 /* userspace is cheating? */ 950 if (readdir_argp->pvnr_resid > uio->uio_resid 951 || readdir_argp->pvnr_ncookies > cookiesmax) { 952 error = EINVAL; 953 goto out; 954 } 955 956 /* check eof */ 957 if (readdir_argp->pvnr_eofflag) 958 *ap->a_eofflag = 1; 959 960 /* bouncy-wouncy with the directory data */ 961 howmuch = uio->uio_resid - readdir_argp->pvnr_resid; 962 963 /* force eof if no data was returned (getcwd() needs this) */ 964 if (howmuch == 0) { 965 *ap->a_eofflag = 1; 966 goto out; 967 } 968 969 error = uiomove(readdir_argp->pvnr_data + cookiemem, howmuch, uio); 970 if (error) 971 goto out; 972 973 /* provide cookies to caller if so desired */ 974 if (ap->a_cookies) { 975 *ap->a_cookies = malloc(readdir_argp->pvnr_ncookies*CSIZE, 976 M_TEMP, M_WAITOK); 977 *ap->a_ncookies = readdir_argp->pvnr_ncookies; 978 memcpy(*ap->a_cookies, readdir_argp->pvnr_data, 979 *ap->a_ncookies*CSIZE); 980 } 981 982 /* next readdir starts here */ 983 uio->uio_offset = readdir_argp->pvnr_offset; 984 985 out: 986 free(readdir_argp, M_PUFFS); 987 return error; 988 } 989 #undef CSIZE 990 991 int 992 puffs_poll(void *v) 993 { 994 struct vop_poll_args /* { 995 const struct vnodeop_desc *a_desc; 996 struct vnode *a_vp; 997 int a_events; 998 struct lwp *a_l; 999 }*/ *ap = v; 1000 1001 PUFFS_VNREQ(poll); 1002 1003 poll_arg.pvnr_events = ap->a_events; 1004 poll_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1005 1006 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_POLL, 1007 &poll_arg, sizeof(poll_arg), 0, VPTOPNC(ap->a_vp), NULL, NULL); 1008 } 1009 1010 int 1011 puffs_fsync(void *v) 1012 { 1013 struct vop_fsync_args /* { 1014 const struct vnodeop_desc *a_desc; 1015 struct vnode *a_vp; 1016 kauth_cred_t a_cred; 1017 int a_flags; 1018 off_t a_offlo; 1019 off_t a_offhi; 1020 struct lwp *a_l; 1021 } */ *ap = v; 1022 struct vattr va; 1023 struct puffs_mount *pmp; 1024 struct puffs_vnreq_fsync *fsync_argp; 1025 struct vnode *vp; 1026 struct puffs_node *pn; 1027 int pflags, error, dofaf; 1028 1029 PUFFS_VNREQ(fsync); 1030 1031 vp = ap->a_vp; 1032 pn = VPTOPP(vp); 1033 pmp = MPTOPUFFSMP(vp->v_mount); 1034 1035 /* flush out information from our metacache, see vop_setattr */ 1036 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1037 vattr_null(&va); 1038 error = VOP_SETATTR(vp, &va, FSCRED, NULL); 1039 if (error) 1040 return error; 1041 } 1042 1043 /* 1044 * flush pages to avoid being overly dirty 1045 */ 1046 pflags = PGO_CLEANIT; 1047 if (ap->a_flags & FSYNC_WAIT) 1048 pflags |= PGO_SYNCIO; 1049 simple_lock(&vp->v_interlock); 1050 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1051 round_page(ap->a_offhi), pflags); 1052 if (error) 1053 return error; 1054 1055 /* 1056 * HELLO! We exit already here if the user server does not 1057 * support fsync OR if we should call fsync for a node which 1058 * has references neither in the kernel or the fs server. 1059 * Otherwise we continue to issue fsync() forward. 1060 */ 1061 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_NOREFS)) 1062 return 0; 1063 1064 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1065 /* 1066 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1067 * only FAFs for those. Otherwise there's a danger of deadlock, 1068 * since the execution context here might be the user server 1069 * doing some operation on another fs, which in turn caused a 1070 * vnode to be reclaimed from the freelist for this fs. 1071 */ 1072 if (dofaf == 0) { 1073 simple_lock(&vp->v_interlock); 1074 if (vp->v_flag & VXLOCK) 1075 dofaf = 1; 1076 simple_unlock(&vp->v_interlock); 1077 } 1078 1079 if (dofaf == 0) { 1080 fsync_argp = &fsync_arg; 1081 } else { 1082 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 1083 M_PUFFS, M_ZERO | M_NOWAIT); 1084 if (fsync_argp == NULL) 1085 return ENOMEM; 1086 } 1087 1088 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 1089 fsync_argp->pvnr_flags = ap->a_flags; 1090 fsync_argp->pvnr_offlo = ap->a_offlo; 1091 fsync_argp->pvnr_offhi = ap->a_offhi; 1092 fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 1093 1094 /* 1095 * XXX: see comment at puffs_getattr about locking 1096 * 1097 * If we are not required to wait, do a FAF operation. 1098 * Otherwise block here. 1099 */ 1100 if (dofaf == 0) { 1101 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1102 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 0, 1103 VPTOPNC(vp), NULL /* XXXshouldbe: vp */, NULL); 1104 } else { 1105 /* FAF is always "succesful" */ 1106 error = 0; 1107 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1108 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 1109 VPTOPNC(vp)); 1110 } 1111 1112 return error; 1113 } 1114 1115 int 1116 puffs_seek(void *v) 1117 { 1118 struct vop_seek_args /* { 1119 const struct vnodeop_desc *a_desc; 1120 struct vnode *a_vp; 1121 off_t a_oldoff; 1122 off_t a_newoff; 1123 kauth_cred_t a_cred; 1124 } */ *ap = v; 1125 1126 PUFFS_VNREQ(seek); 1127 1128 seek_arg.pvnr_oldoff = ap->a_oldoff; 1129 seek_arg.pvnr_newoff = ap->a_newoff; 1130 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1131 1132 /* 1133 * XXX: seems like seek is called with an unlocked vp, but 1134 * it can't hurt to play safe 1135 */ 1136 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1137 &seek_arg, sizeof(seek_arg), 0, VPTOPNC(ap->a_vp), 1138 LOCKEDVP(ap->a_vp), NULL); 1139 } 1140 1141 int 1142 puffs_remove(void *v) 1143 { 1144 struct vop_remove_args /* { 1145 const struct vnodeop_desc *a_desc; 1146 struct vnode *a_dvp; 1147 struct vnode *a_vp; 1148 struct componentname *a_cnp; 1149 } */ *ap = v; 1150 int error; 1151 1152 PUFFS_VNREQ(remove); 1153 1154 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1155 puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp); 1156 1157 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE, 1158 &remove_arg, sizeof(remove_arg), 0, VPTOPNC(ap->a_dvp), 1159 ap->a_dvp, ap->a_vp); 1160 1161 vput(ap->a_vp); 1162 if (ap->a_dvp == ap->a_vp) 1163 vrele(ap->a_dvp); 1164 else 1165 vput(ap->a_dvp); 1166 1167 return error; 1168 } 1169 1170 int 1171 puffs_mkdir(void *v) 1172 { 1173 struct vop_mkdir_args /* { 1174 const struct vnodeop_desc *a_desc; 1175 struct vnode *a_dvp; 1176 struct vnode **a_vpp; 1177 struct componentname *a_cnp; 1178 struct vattr *a_vap; 1179 } */ *ap = v; 1180 int error; 1181 1182 PUFFS_VNREQ(mkdir); 1183 1184 puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp); 1185 mkdir_arg.pvnr_va = *ap->a_vap; 1186 1187 /* XXX: wouldn't need to relock dvp, but that's life */ 1188 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR, 1189 &mkdir_arg, sizeof(mkdir_arg), 0, VPTOPNC(ap->a_dvp), 1190 ap->a_dvp, NULL); 1191 if (error) 1192 goto out; 1193 1194 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1195 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1196 1197 out: 1198 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1199 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1200 vput(ap->a_dvp); 1201 return error; 1202 } 1203 1204 int 1205 puffs_rmdir(void *v) 1206 { 1207 struct vop_rmdir_args /* { 1208 const struct vnodeop_desc *a_desc; 1209 struct vnode *a_dvp; 1210 struct vnode *a_vp; 1211 struct componentname *a_cnp; 1212 } */ *ap = v; 1213 int error; 1214 1215 PUFFS_VNREQ(rmdir); 1216 1217 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1218 puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp); 1219 1220 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR, 1221 &rmdir_arg, sizeof(rmdir_arg), 0, VPTOPNC(ap->a_dvp), 1222 ap->a_dvp, ap->a_vp); 1223 1224 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1225 1226 vput(ap->a_dvp); 1227 vput(ap->a_vp); 1228 1229 return error; 1230 } 1231 1232 int 1233 puffs_link(void *v) 1234 { 1235 struct vop_link_args /* { 1236 const struct vnodeop_desc *a_desc; 1237 struct vnode *a_dvp; 1238 struct vnode *a_vp; 1239 struct componentname *a_cnp; 1240 }*/ *ap = v; 1241 int error; 1242 1243 PUFFS_VNREQ(link); 1244 1245 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1246 puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp); 1247 1248 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK, 1249 &link_arg, sizeof(link_arg), 0, VPTOPNC(ap->a_dvp), 1250 ap->a_dvp, NULL); 1251 1252 /* 1253 * XXX: stay in touch with the cache. I don't like this, but 1254 * don't have a better solution either. See also puffs_rename(). 1255 */ 1256 if (error == 0) 1257 puffs_updatenode(ap->a_vp, PUFFS_UPDATECTIME); 1258 1259 vput(ap->a_dvp); 1260 1261 return error; 1262 } 1263 1264 int 1265 puffs_symlink(void *v) 1266 { 1267 struct vop_symlink_args /* { 1268 const struct vnodeop_desc *a_desc; 1269 struct vnode *a_dvp; 1270 struct vnode **a_vpp; 1271 struct componentname *a_cnp; 1272 struct vattr *a_vap; 1273 char *a_target; 1274 }*/ *ap = v; 1275 int error; 1276 1277 PUFFS_VNREQ(symlink); /* XXX: large structure */ 1278 1279 *ap->a_vpp = NULL; 1280 1281 puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp); 1282 symlink_arg.pvnr_va = *ap->a_vap; 1283 (void)strlcpy(symlink_arg.pvnr_link, ap->a_target, 1284 sizeof(symlink_arg.pvnr_link)); 1285 1286 /* XXX: don't need to relock parent */ 1287 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), 1288 PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg), 0, 1289 VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1290 if (error) 1291 goto out; 1292 1293 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1294 symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0); 1295 1296 out: 1297 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1298 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1299 vput(ap->a_dvp); 1300 return error; 1301 } 1302 1303 int 1304 puffs_readlink(void *v) 1305 { 1306 struct vop_readlink_args /* { 1307 const struct vnodeop_desc *a_desc; 1308 struct vnode *a_vp; 1309 struct uio *a_uio; 1310 kauth_cred_t a_cred; 1311 } */ *ap = v; 1312 size_t linklen; 1313 int error; 1314 1315 PUFFS_VNREQ(readlink); 1316 1317 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1318 linklen = sizeof(readlink_arg.pvnr_link); 1319 readlink_arg.pvnr_linklen = linklen; 1320 1321 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1322 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 0, 1323 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1324 if (error) 1325 return error; 1326 1327 /* bad bad user file server */ 1328 if (readlink_arg.pvnr_linklen > linklen) 1329 return EINVAL; 1330 1331 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1332 ap->a_uio); 1333 } 1334 1335 /* XXXXXXX: think about locking & userspace op delocking... */ 1336 int 1337 puffs_rename(void *v) 1338 { 1339 struct vop_rename_args /* { 1340 const struct vnodeop_desc *a_desc; 1341 struct vnode *a_fdvp; 1342 struct vnode *a_fvp; 1343 struct componentname *a_fcnp; 1344 struct vnode *a_tdvp; 1345 struct vnode *a_tvp; 1346 struct componentname *a_tcnp; 1347 }*/ *ap = v; 1348 int error; 1349 1350 PUFFS_VNREQ(rename); 1351 1352 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) { 1353 error = EXDEV; 1354 goto out; 1355 } 1356 1357 rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1358 rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1359 if (ap->a_tvp) 1360 rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1361 else 1362 rename_arg.pvnr_cookie_targ = NULL; 1363 puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp); 1364 puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp); 1365 1366 error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount), 1367 PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg), 0, 1368 VPTOPNC(ap->a_fdvp), NULL, NULL); 1369 1370 /* 1371 * XXX: stay in touch with the cache. I don't like this, but 1372 * don't have a better solution either. See also puffs_link(). 1373 */ 1374 if (error == 0) 1375 puffs_updatenode(ap->a_fvp, PUFFS_UPDATECTIME); 1376 1377 out: 1378 if (ap->a_tvp != NULL) 1379 vput(ap->a_tvp); 1380 if (ap->a_tdvp == ap->a_tvp) 1381 vrele(ap->a_tdvp); 1382 else 1383 vput(ap->a_tdvp); 1384 1385 vrele(ap->a_fdvp); 1386 vrele(ap->a_fvp); 1387 1388 return error; 1389 } 1390 1391 int 1392 puffs_read(void *v) 1393 { 1394 struct vop_read_args /* { 1395 const struct vnodeop_desc *a_desc; 1396 struct vnode *a_vp; 1397 struct uio *a_uio; 1398 int a_ioflag; 1399 kauth_cred_t a_cred; 1400 } */ *ap = v; 1401 struct puffs_vnreq_read *read_argp; 1402 struct puffs_mount *pmp; 1403 struct vnode *vp; 1404 struct uio *uio; 1405 void *win; 1406 size_t tomove, argsize; 1407 vsize_t bytelen; 1408 int error, ubcflags; 1409 1410 uio = ap->a_uio; 1411 vp = ap->a_vp; 1412 read_argp = NULL; 1413 error = 0; 1414 pmp = MPTOPUFFSMP(vp->v_mount); 1415 1416 /* std sanity */ 1417 if (uio->uio_resid == 0) 1418 return 0; 1419 if (uio->uio_offset < 0) 1420 return EINVAL; 1421 1422 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1423 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1424 1425 ubcflags = 0; 1426 if (UBC_WANT_UNMAP(vp)) 1427 ubcflags = UBC_UNMAP; 1428 1429 while (uio->uio_resid > 0) { 1430 bytelen = MIN(uio->uio_resid, 1431 vp->v_size - uio->uio_offset); 1432 if (bytelen == 0) 1433 break; 1434 1435 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1436 &bytelen, advice, UBC_READ); 1437 error = uiomove(win, bytelen, uio); 1438 ubc_release(win, ubcflags); 1439 if (error) 1440 break; 1441 } 1442 1443 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1444 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1445 } else { 1446 /* 1447 * in case it's not a regular file or we're operating 1448 * uncached, do read in the old-fashioned style, 1449 * i.e. explicit read operations 1450 */ 1451 1452 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1453 argsize = sizeof(struct puffs_vnreq_read); 1454 read_argp = malloc(argsize + tomove, 1455 M_PUFFS, M_WAITOK | M_ZERO); 1456 1457 error = 0; 1458 while (uio->uio_resid > 0) { 1459 read_argp->pvnr_ioflag = ap->a_ioflag; 1460 read_argp->pvnr_resid = tomove; 1461 read_argp->pvnr_offset = uio->uio_offset; 1462 puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred); 1463 1464 argsize = sizeof(struct puffs_vnreq_read); 1465 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1466 read_argp, argsize, tomove, 1467 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1468 if (error) 1469 break; 1470 1471 if (read_argp->pvnr_resid > tomove) { 1472 error = EINVAL; 1473 break; 1474 } 1475 1476 error = uiomove(read_argp->pvnr_data, 1477 tomove - read_argp->pvnr_resid, uio); 1478 1479 /* 1480 * in case the file is out of juice, resid from 1481 * userspace is != 0. and the error-case is 1482 * quite obvious 1483 */ 1484 if (error || read_argp->pvnr_resid) 1485 break; 1486 1487 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1488 } 1489 } 1490 1491 if (read_argp) 1492 free(read_argp, M_PUFFS); 1493 return error; 1494 } 1495 1496 int 1497 puffs_write(void *v) 1498 { 1499 struct vop_write_args /* { 1500 const struct vnodeop_desc *a_desc; 1501 struct vnode *a_vp; 1502 struct uio *a_uio; 1503 int a_ioflag; 1504 kauth_cred_t a_cred; 1505 }*/ *ap = v; 1506 struct puffs_vnreq_write *write_argp; 1507 struct puffs_mount *pmp; 1508 struct uio *uio; 1509 struct vnode *vp; 1510 void *win; 1511 size_t tomove, argsize; 1512 off_t oldoff, newoff, origoff; 1513 vsize_t bytelen; 1514 int error, uflags; 1515 int ubcflags; 1516 1517 vp = ap->a_vp; 1518 uio = ap->a_uio; 1519 error = uflags = 0; 1520 write_argp = NULL; 1521 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1522 1523 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1524 ubcflags = 0; 1525 if (UBC_WANT_UNMAP(vp)) 1526 ubcflags = UBC_UNMAP; 1527 1528 /* 1529 * userspace *should* be allowed to control this, 1530 * but with UBC it's a bit unclear how to handle it 1531 */ 1532 if (ap->a_ioflag & IO_APPEND) 1533 uio->uio_offset = vp->v_size; 1534 1535 origoff = uio->uio_offset; 1536 while (uio->uio_resid > 0) { 1537 uflags |= PUFFS_UPDATECTIME; 1538 uflags |= PUFFS_UPDATEMTIME; 1539 oldoff = uio->uio_offset; 1540 bytelen = uio->uio_resid; 1541 1542 win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, 1543 UVM_ADV_NORMAL, UBC_WRITE); 1544 error = uiomove(win, bytelen, uio); 1545 1546 /* 1547 * There is no guarantee that the faults 1548 * generated by uiomove() succeed at all. 1549 * Therefore, in case of an uiomove() error, 1550 * opt to not extend the file at all and 1551 * return an error. Otherwise, if we attempt 1552 * to clear the memory we couldn't fault to, 1553 * we might generate a kernel page fault. 1554 */ 1555 newoff = oldoff + bytelen; 1556 if (vp->v_size < newoff && error == 0) { 1557 uflags |= PUFFS_UPDATESIZE; 1558 uvm_vnp_setsize(vp, newoff); 1559 } 1560 1561 ubc_release(win, ubcflags); 1562 if (error) 1563 break; 1564 1565 /* 1566 * If we're writing large files, flush to file server 1567 * every 64k. Otherwise we can very easily exhaust 1568 * kernel and user memory, as the file server cannot 1569 * really keep up with our writing speed. 1570 * 1571 * Note: this does *NOT* honor MNT_ASYNC, because 1572 * that gives userland too much say in the kernel. 1573 */ 1574 if (oldoff >> 16 != uio->uio_offset >> 16) { 1575 simple_lock(&vp->v_interlock); 1576 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1577 uio->uio_offset & ~0xffff, 1578 PGO_CLEANIT | PGO_SYNCIO); 1579 if (error) 1580 break; 1581 } 1582 } 1583 1584 /* synchronous I/O? */ 1585 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1586 simple_lock(&vp->v_interlock); 1587 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1588 round_page(uio->uio_offset), 1589 PGO_CLEANIT | PGO_SYNCIO); 1590 1591 /* write though page cache? */ 1592 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1593 simple_lock(&vp->v_interlock); 1594 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1595 round_page(uio->uio_offset), PGO_CLEANIT); 1596 } 1597 1598 puffs_updatenode(vp, uflags); 1599 } else { 1600 /* tomove is non-increasing */ 1601 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1602 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1603 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1604 1605 while (uio->uio_resid > 0) { 1606 write_argp->pvnr_ioflag = ap->a_ioflag; 1607 write_argp->pvnr_resid = tomove; 1608 write_argp->pvnr_offset = uio->uio_offset; 1609 puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred); 1610 error = uiomove(write_argp->pvnr_data, tomove, uio); 1611 if (error) 1612 break; 1613 1614 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1615 PUFFS_VN_WRITE, write_argp, argsize, 0, 1616 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1617 if (error) { 1618 /* restore uiomove */ 1619 uio->uio_resid += tomove; 1620 uio->uio_offset -= tomove; 1621 break; 1622 } 1623 if (write_argp->pvnr_resid > tomove) { 1624 /* 1625 * XXX: correct file size is a mystery, 1626 * we can only guess 1627 */ 1628 error = EINVAL; 1629 break; 1630 } 1631 1632 /* adjust file size */ 1633 if (vp->v_size < uio->uio_offset) 1634 uvm_vnp_setsize(vp, uio->uio_offset); 1635 1636 /* didn't move everything? bad userspace. bail */ 1637 if (write_argp->pvnr_resid != 0) { 1638 uio->uio_resid += write_argp->pvnr_resid; 1639 uio->uio_offset -= write_argp->pvnr_resid; 1640 error = EIO; 1641 break; 1642 } 1643 1644 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1645 } 1646 } 1647 1648 if (write_argp) 1649 free(write_argp, M_PUFFS); 1650 return error; 1651 } 1652 1653 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1654 1655 #define FCNIOCTL_ARG_MAX 1<<16 1656 int 1657 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1658 { 1659 1660 /* currently not supported */ 1661 return EOPNOTSUPP; 1662 #if 0 1663 /* struct vop_ioctl_args { 1664 const struct vnodeop_desc *a_desc; 1665 struct vnode *a_vp; 1666 u_long a_command; 1667 void *a_data; 1668 int a_fflag; 1669 kauth_cred_t a_cred; 1670 struct lwp *a_l; 1671 }*ap = v; */ 1672 struct puffs_mount *pmp; 1673 struct puffs_sizepark pspark; 1674 void *kernbuf; 1675 size_t copylen; 1676 int error; 1677 1678 PUFFS_VNREQ(fcnioctl); 1679 1680 /* 1681 * Since this op gives the filesystem (almost) complete control on 1682 * how much it is allowed to copy from the calling process 1683 * address space, do not enable it by default, since it would 1684 * be a whopping security hole. 1685 */ 1686 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1687 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1688 return EINVAL; /* only shoe that fits */ 1689 1690 /* fill in sizereq and store it */ 1691 pspark.pkso_reqid = puffs_getreqid(pmp); 1692 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1693 pspark.pkso_copybuf = ap->a_data; 1694 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1695 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1696 1697 /* then fill in actual request and shoot it off */ 1698 fcnioctl_arg.pvnr_command = ap->a_command; 1699 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1700 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1701 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1702 1703 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1704 &fcnioctl_arg, sizeof(fcnioctl_arg), 0, VPTOPNC(ap->a_vp), 1705 pspark.pkso_reqid, NULL, NULL); 1706 1707 /* if we don't need to copy data, we're done */ 1708 if (error || !fcnioctl_arg.pvnr_copyback) 1709 return error; 1710 1711 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1712 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1713 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1714 if (error) 1715 goto out; 1716 error = copyout(kernbuf, ap->a_data, copylen); 1717 1718 out: 1719 free(kernbuf, M_PUFFS); 1720 return error; 1721 #endif 1722 } 1723 1724 int 1725 puffs_ioctl(void *v) 1726 { 1727 1728 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1729 } 1730 1731 int 1732 puffs_fcntl(void *v) 1733 { 1734 1735 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1736 } 1737 1738 int 1739 puffs_print(void *v) 1740 { 1741 struct vop_print_args /* { 1742 struct vnode *a_vp; 1743 } */ *ap = v; 1744 struct puffs_mount *pmp; 1745 struct vnode *vp = ap->a_vp; 1746 struct puffs_node *pn = vp->v_data; 1747 1748 PUFFS_VNREQ(print); 1749 1750 pmp = MPTOPUFFSMP(vp->v_mount); 1751 1752 /* kernel portion */ 1753 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1754 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1755 if (vp->v_type == VFIFO) 1756 fifo_printinfo(vp); 1757 lockmgr_printinfo(&vp->v_lock); 1758 1759 /* userspace portion */ 1760 if (EXISTSOP(pmp, PRINT)) 1761 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1762 &print_arg, sizeof(print_arg), 0, VPTOPNC(ap->a_vp), 1763 LOCKEDVP(ap->a_vp), NULL); 1764 1765 return 0; 1766 } 1767 1768 int 1769 puffs_pathconf(void *v) 1770 { 1771 struct vop_pathconf_args /* { 1772 const struct vnodeop_desc *a_desc; 1773 struct vnode *a_vp; 1774 int a_name; 1775 register_t *a_retval; 1776 } */ *ap = v; 1777 int error; 1778 1779 PUFFS_VNREQ(pathconf); 1780 1781 pathconf_arg.pvnr_name = ap->a_name; 1782 1783 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1784 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 0, 1785 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1786 if (error) 1787 return error; 1788 1789 *ap->a_retval = pathconf_arg.pvnr_retval; 1790 1791 return 0; 1792 } 1793 1794 int 1795 puffs_advlock(void *v) 1796 { 1797 struct vop_advlock_args /* { 1798 const struct vnodeop_desc *a_desc; 1799 struct vnode *a_vp; 1800 void *a_id; 1801 int a_op; 1802 struct flock *a_fl; 1803 int a_flags; 1804 } */ *ap = v; 1805 int error; 1806 1807 PUFFS_VNREQ(advlock); 1808 1809 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1810 if (error) 1811 return error; 1812 advlock_arg.pvnr_id = ap->a_id; 1813 advlock_arg.pvnr_op = ap->a_op; 1814 advlock_arg.pvnr_flags = ap->a_flags; 1815 1816 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1817 &advlock_arg, sizeof(advlock_arg), 0, VPTOPNC(ap->a_vp), 1818 NULL, NULL); 1819 } 1820 /* 1821 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1822 */ 1823 int 1824 puffs_strategy(void *v) 1825 { 1826 struct vop_strategy_args /* { 1827 const struct vnodeop_desc *a_desc; 1828 struct vnode *a_vp; 1829 struct buf *a_bp; 1830 } */ *ap = v; 1831 struct puffs_mount *pmp; 1832 struct vnode *vp = ap->a_vp; 1833 struct puffs_node *pn; 1834 struct puffs_vnreq_read *read_argp = NULL; 1835 struct puffs_vnreq_write *write_argp = NULL; 1836 struct buf *bp; 1837 size_t argsize; 1838 size_t tomove, moved; 1839 int error, dowritefaf; 1840 1841 pmp = MPTOPUFFSMP(vp->v_mount); 1842 bp = ap->a_bp; 1843 error = 0; 1844 dowritefaf = 0; 1845 pn = VPTOPP(vp); 1846 1847 if (((bp->b_flags & B_READ) && !EXISTSOP(pmp, READ)) 1848 || (((bp->b_flags & B_READ) == 0) && !EXISTSOP(pmp, WRITE))) { 1849 error = EOPNOTSUPP; 1850 goto out; 1851 } 1852 1853 /* 1854 * Short-circuit optimization: don't flush buffer in between 1855 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 1856 */ 1857 if (pn->pn_stat & PNODE_NOREFS) { 1858 bp->b_resid = 0; 1859 goto out; 1860 } 1861 1862 #ifdef DIAGNOSTIC 1863 if (bp->b_bcount > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1864 panic("puffs_strategy: wildly inappropriate buf bcount %d", 1865 bp->b_bcount); 1866 #endif 1867 1868 /* 1869 * See explanation for the necessity of a FAF in puffs_fsync. 1870 * 1871 * Also, do FAF in case we're suspending. 1872 * See puffs_vfsops.c:pageflush() 1873 * 1874 * XXgoddamnX: B_WRITE is a "pseudo flag" 1875 */ 1876 if ((bp->b_flags & B_READ) == 0) { 1877 simple_lock(&vp->v_interlock); 1878 if (vp->v_flag & VXLOCK) 1879 dowritefaf = 1; 1880 if (pn->pn_stat & PNODE_SUSPEND) 1881 dowritefaf = 1; 1882 simple_unlock(&vp->v_interlock); 1883 } 1884 1885 if (bp->b_flags & B_ASYNC) 1886 dowritefaf = 1; 1887 1888 #ifdef DIAGNOSTIC 1889 if (curproc == uvm.pagedaemon_proc) 1890 KASSERT(dowritefaf); 1891 #endif 1892 1893 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 1894 1895 if ((bp->b_flags & (B_READ | B_ASYNC)) == (B_READ | B_ASYNC)) { 1896 argsize = sizeof(struct puffs_vnreq_read); 1897 read_argp = malloc(argsize + tomove, 1898 M_PUFFS, M_NOWAIT | M_ZERO); 1899 if (read_argp == NULL) { 1900 error = ENOMEM; 1901 goto out; 1902 } 1903 1904 read_argp->pvnr_ioflag = 0; 1905 read_argp->pvnr_resid = tomove; 1906 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1907 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1908 1909 puffs_vntouser_call(pmp, PUFFS_VN_READ, read_argp, 1910 argsize, tomove, VPTOPNC(vp), 1911 puffs_parkdone_asyncbioread, bp, 1912 LOCKEDVP(vp), NULL); 1913 error = 0; 1914 goto wayout; 1915 } else if (bp->b_flags & B_READ) { 1916 argsize = sizeof(struct puffs_vnreq_read); 1917 read_argp = malloc(argsize + tomove, 1918 M_PUFFS, M_WAITOK | M_ZERO); 1919 1920 read_argp->pvnr_ioflag = 0; 1921 read_argp->pvnr_resid = tomove; 1922 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1923 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1924 1925 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1926 read_argp, argsize, tomove, 1927 VPTOPNC(vp), LOCKEDVP(vp), NULL); 1928 1929 if (error) 1930 goto out; 1931 1932 if (read_argp->pvnr_resid > tomove) { 1933 error = EINVAL; 1934 goto out; 1935 } 1936 1937 moved = tomove - read_argp->pvnr_resid; 1938 1939 (void)memcpy(bp->b_data, read_argp->pvnr_data, moved); 1940 bp->b_resid = bp->b_bcount - moved; 1941 } else { 1942 /* 1943 * make pages read-only before we write them if we want 1944 * write caching info 1945 */ 1946 if (PUFFS_WCACHEINFO(pmp)) { 1947 struct uvm_object *uobj = &vp->v_uobj; 1948 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 1949 struct vm_page *vmp; 1950 int i; 1951 1952 for (i = 0; i < npages; i++) { 1953 vmp= uvm_pageratop((vaddr_t)bp->b_data 1954 + (i << PAGE_SHIFT)); 1955 DPRINTF(("puffs_strategy: write-protecting " 1956 "vp %p page %p, offset %" PRId64"\n", 1957 vp, vmp, vmp->offset)); 1958 simple_lock(&uobj->vmobjlock); 1959 vmp->flags |= PG_RDONLY; 1960 pmap_page_protect(vmp, VM_PROT_READ); 1961 simple_unlock(&uobj->vmobjlock); 1962 } 1963 } 1964 1965 argsize = sizeof(struct puffs_vnreq_write) + bp->b_bcount; 1966 write_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 1967 if (write_argp == NULL) { 1968 error = ENOMEM; 1969 goto out; 1970 } 1971 1972 write_argp->pvnr_ioflag = 0; 1973 write_argp->pvnr_resid = tomove; 1974 write_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1975 puffs_credcvt(&write_argp->pvnr_cred, FSCRED); 1976 1977 (void)memcpy(&write_argp->pvnr_data, bp->b_data, tomove); 1978 1979 if (dowritefaf) { 1980 /* 1981 * assume FAF moves everything. frankly, we don't 1982 * really have a choice. 1983 */ 1984 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1985 PUFFS_VN_WRITE, write_argp, argsize, VPTOPNC(vp)); 1986 bp->b_resid = bp->b_bcount - tomove; 1987 } else { 1988 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1989 PUFFS_VN_WRITE, write_argp, argsize, 0, VPTOPNC(vp), 1990 vp, NULL); 1991 if (error) 1992 goto out; 1993 1994 moved = tomove - write_argp->pvnr_resid; 1995 if (write_argp->pvnr_resid > tomove) { 1996 error = EINVAL; 1997 goto out; 1998 } 1999 2000 bp->b_resid = bp->b_bcount - moved; 2001 if (write_argp->pvnr_resid != 0) 2002 error = EIO; 2003 } 2004 } 2005 2006 out: 2007 if (read_argp) 2008 free(read_argp, M_PUFFS); 2009 if (write_argp && !dowritefaf) 2010 free(write_argp, M_PUFFS); 2011 2012 if (error) { 2013 bp->b_error = error; 2014 bp->b_flags |= B_ERROR; 2015 } 2016 2017 if ((bp->b_flags & (B_READ | B_ASYNC)) != (B_READ | B_ASYNC)) 2018 biodone(bp); 2019 wayout: 2020 return error; 2021 } 2022 2023 int 2024 puffs_mmap(void *v) 2025 { 2026 struct vop_mmap_args /* { 2027 const struct vnodeop_desc *a_desc; 2028 struct vnode *a_vp; 2029 int a_fflags; 2030 kauth_cred_t a_cred; 2031 struct lwp *a_l; 2032 } */ *ap = v; 2033 struct puffs_mount *pmp; 2034 int error; 2035 2036 PUFFS_VNREQ(mmap); 2037 2038 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2039 2040 if (!PUFFS_DOCACHE(pmp)) 2041 return genfs_eopnotsupp(v); 2042 2043 if (EXISTSOP(pmp, MMAP)) { 2044 mmap_arg.pvnr_fflags = ap->a_fflags; 2045 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 2046 mmap_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 2047 2048 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 2049 &mmap_arg, sizeof(mmap_arg), 0, 2050 VPTOPNC(ap->a_vp), NULL, NULL); 2051 } else { 2052 error = genfs_mmap(v); 2053 } 2054 2055 return error; 2056 } 2057 2058 2059 /* 2060 * The rest don't get a free trip to userspace and back, they 2061 * have to stay within the kernel. 2062 */ 2063 2064 /* 2065 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2066 * well, maybe somehow, somewhere, some day .... 2067 */ 2068 int 2069 puffs_bmap(void *v) 2070 { 2071 struct vop_bmap_args /* { 2072 const struct vnodeop_desc *a_desc; 2073 struct vnode *a_vp; 2074 daddr_t a_bn; 2075 struct vnode **a_vpp; 2076 daddr_t *a_bnp; 2077 int *a_runp; 2078 } */ *ap = v; 2079 struct puffs_mount *pmp; 2080 2081 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2082 2083 if (ap->a_vpp) 2084 *ap->a_vpp = ap->a_vp; 2085 if (ap->a_bnp) 2086 *ap->a_bnp = ap->a_bn; 2087 if (ap->a_runp) 2088 *ap->a_runp 2089 = (PUFFS_TOMOVE(pmp->pmp_req_maxsize, pmp)>>DEV_BSHIFT) - 1; 2090 2091 return 0; 2092 } 2093 2094 /* 2095 * Handle getpages faults in puffs. We let genfs_getpages() do most 2096 * of the dirty work, but we come in this route to do accounting tasks. 2097 * If the user server has specified functions for cache notifications 2098 * about reads and/or writes, we record which type of operation we got, 2099 * for which page range, and proceed to issue a FAF notification to the 2100 * server about it. 2101 */ 2102 int 2103 puffs_getpages(void *v) 2104 { 2105 struct vop_getpages_args /* { 2106 const struct vnodeop_desc *a_desc; 2107 struct vnode *a_vp; 2108 voff_t a_offset; 2109 struct vm_page **a_m; 2110 int *a_count; 2111 int a_centeridx; 2112 vm_prot_t a_access_type; 2113 int a_advice; 2114 int a_flags; 2115 } */ *ap = v; 2116 struct puffs_mount *pmp; 2117 struct vnode *vp; 2118 struct vm_page **pgs; 2119 struct puffs_cacheinfo *pcinfo = NULL; 2120 struct puffs_cacherun *pcrun; 2121 void *parkmem = NULL; 2122 size_t runsizes; 2123 int i, npages, si, streakon; 2124 int error, locked, write; 2125 2126 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2127 npages = *ap->a_count; 2128 pgs = ap->a_m; 2129 vp = ap->a_vp; 2130 locked = (ap->a_flags & PGO_LOCKED) != 0; 2131 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2132 2133 /* ccg xnaht - gets Wuninitialized wrong */ 2134 pcrun = NULL; 2135 runsizes = 0; 2136 2137 if (write && PUFFS_WCACHEINFO(pmp)) { 2138 /* allocate worst-case memory */ 2139 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2140 pcinfo = malloc(sizeof(struct puffs_cacheinfo) + runsizes, 2141 M_PUFFS, M_ZERO | locked ? M_NOWAIT : M_WAITOK); 2142 2143 /* 2144 * can't block if we're locked and can't mess up caching 2145 * information for fs server. so come back later, please 2146 */ 2147 if (pcinfo == NULL) { 2148 error = ENOMEM; 2149 goto out; 2150 } 2151 2152 parkmem = puffs_park_alloc(locked == 0); 2153 if (parkmem == NULL) { 2154 error = ENOMEM; 2155 goto out; 2156 } 2157 2158 pcrun = pcinfo->pcache_runs; 2159 } 2160 2161 error = genfs_getpages(v); 2162 if (error) 2163 goto out; 2164 2165 if (PUFFS_WCACHEINFO(pmp) == 0) 2166 goto out; 2167 2168 /* 2169 * Let's see whose fault it was and inform the user server of 2170 * possibly read/written pages. Map pages from read faults 2171 * strictly read-only, since otherwise we might miss info on 2172 * when the page is actually write-faulted to. 2173 */ 2174 if (!locked) 2175 simple_lock(&vp->v_uobj.vmobjlock); 2176 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2177 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2178 if (streakon && write) { 2179 streakon = 0; 2180 pcrun[si].pcache_runend 2181 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2182 si++; 2183 } 2184 continue; 2185 } 2186 if (streakon == 0 && write) { 2187 streakon = 1; 2188 pcrun[si].pcache_runstart = pgs[i]->offset; 2189 } 2190 2191 if (!write) 2192 pgs[i]->flags |= PG_RDONLY; 2193 } 2194 /* was the last page part of our streak? */ 2195 if (streakon) { 2196 pcrun[si].pcache_runend 2197 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2198 si++; 2199 } 2200 if (!locked) 2201 simple_unlock(&vp->v_uobj.vmobjlock); 2202 2203 KASSERT(si <= (npages / 2) + 1); 2204 2205 /* send results to userspace */ 2206 if (write) 2207 puffs_cacheop(pmp, parkmem, pcinfo, 2208 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2209 2210 out: 2211 if (error) { 2212 if (pcinfo != NULL) 2213 free(pcinfo, M_PUFFS); 2214 if (parkmem != NULL) 2215 puffs_park_release(parkmem, 1); 2216 } 2217 2218 return error; 2219 } 2220 2221 int 2222 puffs_lock(void *v) 2223 { 2224 struct vop_lock_args /* { 2225 struct vnode *a_vp; 2226 int a_flags; 2227 }*/ *ap = v; 2228 struct vnode *vp = ap->a_vp; 2229 struct mount *mp = vp->v_mount; 2230 2231 #if 0 2232 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2233 #endif 2234 2235 /* 2236 * XXX: this avoids deadlocking when we're suspending. 2237 * e.g. some ops holding the vnode lock might be blocked for 2238 * the vfs transaction lock so we'd deadlock. 2239 * 2240 * Now once again this is skating on the thin ice of modern life, 2241 * since we are breaking the consistency guarantee provided 2242 * _to the user server_ by vnode locking. Hopefully this will 2243 * get fixed soon enough by getting rid of the dependency on 2244 * vnode locks alltogether. 2245 */ 2246 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2247 if (ap->a_flags & LK_INTERLOCK) 2248 simple_unlock(&vp->v_interlock); 2249 return 0; 2250 } 2251 2252 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2253 } 2254 2255 int 2256 puffs_unlock(void *v) 2257 { 2258 struct vop_unlock_args /* { 2259 struct vnode *a_vp; 2260 int a_flags; 2261 } */ *ap = v; 2262 struct vnode *vp = ap->a_vp; 2263 struct mount *mp = vp->v_mount; 2264 2265 #if 0 2266 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2267 #endif 2268 2269 /* XXX: see puffs_lock() */ 2270 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2271 if (ap->a_flags & LK_INTERLOCK) 2272 simple_unlock(&vp->v_interlock); 2273 return 0; 2274 } 2275 2276 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2277 } 2278 2279 int 2280 puffs_islocked(void *v) 2281 { 2282 struct vop_islocked_args *ap = v; 2283 int rv; 2284 2285 rv = lockstatus(&ap->a_vp->v_lock); 2286 return rv; 2287 } 2288 2289 int 2290 puffs_generic(void *v) 2291 { 2292 struct vop_generic_args *ap = v; 2293 2294 (void)ap; 2295 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2296 2297 return EOPNOTSUPP; 2298 } 2299 2300 2301 /* 2302 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2303 * FAF update information for the puffs node first. 2304 */ 2305 int 2306 puffs_spec_read(void *v) 2307 { 2308 struct vop_read_args /* { 2309 const struct vnodeop_desc *a_desc; 2310 struct vnode *a_vp; 2311 struct uio *a_uio; 2312 int a_ioflag; 2313 kauth_cred_t a_cred; 2314 } */ *ap = v; 2315 2316 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2317 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2318 } 2319 2320 int 2321 puffs_spec_write(void *v) 2322 { 2323 struct vop_write_args /* { 2324 const struct vnodeop_desc *a_desc; 2325 struct vnode *a_vp; 2326 struct uio *a_uio; 2327 int a_ioflag; 2328 kauth_cred_t a_cred; 2329 }*/ *ap = v; 2330 2331 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2332 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2333 } 2334 2335 int 2336 puffs_fifo_read(void *v) 2337 { 2338 struct vop_read_args /* { 2339 const struct vnodeop_desc *a_desc; 2340 struct vnode *a_vp; 2341 struct uio *a_uio; 2342 int a_ioflag; 2343 kauth_cred_t a_cred; 2344 } */ *ap = v; 2345 2346 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2347 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2348 } 2349 2350 int 2351 puffs_fifo_write(void *v) 2352 { 2353 struct vop_write_args /* { 2354 const struct vnodeop_desc *a_desc; 2355 struct vnode *a_vp; 2356 struct uio *a_uio; 2357 int a_ioflag; 2358 kauth_cred_t a_cred; 2359 }*/ *ap = v; 2360 2361 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2362 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2363 } 2364
Indexes created Tue Sep 30 11:09:46 GMT 2025