puffs_vnops.c revision 1.48
1 /* $NetBSD: puffs_vnops.c,v 1.48 2007/02/09 08:15:41 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 1.48 2007/02/09 08:15:41 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 85 int puffs_spec_read(void *); 86 int puffs_spec_write(void *); 87 int puffs_fifo_read(void *); 88 int puffs_fifo_write(void *); 89 90 int puffs_checkop(void *); 91 92 93 /* VOP_LEASE() not included */ 94 95 int puffs_generic(void *); 96 97 #if 0 98 #define puffs_lock genfs_lock 99 #define puffs_unlock genfs_unlock 100 #define puffs_islocked genfs_islocked 101 #else 102 int puffs_lock(void *); 103 int puffs_unlock(void *); 104 int puffs_islocked(void *); 105 #endif 106 107 int (**puffs_vnodeop_p)(void *); 108 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 109 { &vop_default_desc, vn_default_error }, 110 { &vop_lookup_desc, puffs_lookup }, /* REAL lookup */ 111 { &vop_create_desc, puffs_checkop }, /* create */ 112 { &vop_mknod_desc, puffs_checkop }, /* mknod */ 113 { &vop_open_desc, puffs_open }, /* REAL open */ 114 { &vop_close_desc, puffs_checkop }, /* close */ 115 { &vop_access_desc, puffs_access }, /* REAL access */ 116 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 117 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 118 { &vop_read_desc, puffs_checkop }, /* read */ 119 { &vop_write_desc, puffs_checkop }, /* write */ 120 { &vop_fcntl_desc, puffs_checkop }, /* fcntl */ 121 { &vop_ioctl_desc, puffs_checkop }, /* ioctl */ 122 { &vop_fsync_desc, puffs_fsync }, /* REAL fsync */ 123 { &vop_seek_desc, puffs_checkop }, /* seek */ 124 { &vop_remove_desc, puffs_checkop }, /* remove */ 125 { &vop_link_desc, puffs_checkop }, /* link */ 126 { &vop_rename_desc, puffs_checkop }, /* rename */ 127 { &vop_mkdir_desc, puffs_checkop }, /* mkdir */ 128 { &vop_rmdir_desc, puffs_checkop }, /* rmdir */ 129 { &vop_symlink_desc, puffs_checkop }, /* symlink */ 130 { &vop_readdir_desc, puffs_checkop }, /* readdir */ 131 { &vop_readlink_desc, puffs_checkop }, /* readlink */ 132 { &vop_getpages_desc, puffs_checkop }, /* getpages */ 133 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 134 { &vop_pathconf_desc, puffs_checkop }, /* pathconf */ 135 { &vop_advlock_desc, puffs_checkop }, /* advlock */ 136 { &vop_strategy_desc, puffs_strategy }, /* REAL strategy */ 137 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 138 { &vop_abortop_desc, genfs_abortop }, /* REAL abortop */ 139 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 140 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 141 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 142 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 143 { &vop_bmap_desc, puffs_bmap }, /* REAL bmap */ 144 { &vop_print_desc, puffs_print }, /* REAL print */ 145 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 146 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 147 { &vop_mmap_desc, puffs_mmap }, /* REAL mmap */ 148 149 { &vop_poll_desc, genfs_eopnotsupp }, /* poll XXX */ 150 { &vop_poll_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 151 { NULL, NULL } 152 }; 153 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 154 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 155 156 157 int (**puffs_specop_p)(void *); 158 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 159 { &vop_default_desc, vn_default_error }, 160 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 161 { &vop_create_desc, spec_create }, /* genfs_badop */ 162 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 163 { &vop_open_desc, spec_open }, /* spec_open */ 164 { &vop_close_desc, spec_close }, /* spec_close */ 165 { &vop_access_desc, puffs_checkop }, /* access */ 166 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 167 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 168 { &vop_read_desc, puffs_spec_read }, /* update, read */ 169 { &vop_write_desc, puffs_spec_write }, /* update, write */ 170 { &vop_lease_desc, spec_lease_check }, /* genfs_nullop */ 171 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 172 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 173 { &vop_poll_desc, spec_poll }, /* spec_poll */ 174 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 175 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 176 { &vop_mmap_desc, spec_mmap }, /* genfs_mmap (dummy) */ 177 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 178 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 179 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 180 { &vop_link_desc, spec_link }, /* genfs_badop */ 181 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 182 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 183 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 184 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 185 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 186 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 187 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 188 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 189 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 190 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 191 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 192 { &vop_bmap_desc, spec_bmap }, /* dummy */ 193 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 194 { &vop_print_desc, puffs_print }, /* REAL print */ 195 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 196 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 197 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 198 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 199 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 200 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 201 #if 0 202 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 203 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 204 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 205 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 206 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 207 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 208 #endif 209 { NULL, NULL } 210 }; 211 const struct vnodeopv_desc puffs_specop_opv_desc = 212 { &puffs_specop_p, puffs_specop_entries }; 213 214 215 int (**puffs_fifoop_p)(void *); 216 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 217 { &vop_default_desc, vn_default_error }, 218 { &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */ 219 { &vop_create_desc, fifo_create }, /* genfs_badop */ 220 { &vop_mknod_desc, fifo_mknod }, /* genfs_badop */ 221 { &vop_open_desc, fifo_open }, /* open */ 222 { &vop_close_desc, fifo_close }, /* close */ 223 { &vop_access_desc, puffs_checkop }, /* access */ 224 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 225 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 226 { &vop_read_desc, puffs_fifo_read }, /* read, update */ 227 { &vop_write_desc, puffs_fifo_write }, /* write, update */ 228 { &vop_lease_desc, fifo_lease_check }, /* genfs_nullop */ 229 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 230 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 231 { &vop_poll_desc, fifo_poll }, /* poll */ 232 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 233 { &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */ 234 { &vop_mmap_desc, fifo_mmap }, /* genfs_badop */ 235 { &vop_fsync_desc, fifo_fsync }, /* genfs_nullop*/ 236 { &vop_seek_desc, fifo_seek }, /* genfs_badop */ 237 { &vop_remove_desc, fifo_remove }, /* genfs_badop */ 238 { &vop_link_desc, fifo_link }, /* genfs_badop */ 239 { &vop_rename_desc, fifo_rename }, /* genfs_badop */ 240 { &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */ 241 { &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */ 242 { &vop_symlink_desc, fifo_symlink }, /* genfs_badop */ 243 { &vop_readdir_desc, fifo_readdir }, /* genfs_badop */ 244 { &vop_readlink_desc, fifo_readlink }, /* genfs_badop */ 245 { &vop_abortop_desc, fifo_abortop }, /* genfs_badop */ 246 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 247 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 248 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 249 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 250 { &vop_bmap_desc, fifo_bmap }, /* dummy */ 251 { &vop_strategy_desc, fifo_strategy }, /* genfs_badop */ 252 { &vop_print_desc, puffs_print }, /* REAL print */ 253 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 254 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 255 { &vop_advlock_desc, fifo_advlock }, /* genfs_einval */ 256 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 257 { &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/ 258 #if 0 259 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 260 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 261 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 262 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 263 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 264 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 265 #endif 266 { NULL, NULL } 267 }; 268 const struct vnodeopv_desc puffs_fifoop_opv_desc = 269 { &puffs_fifoop_p, puffs_fifoop_entries }; 270 271 272 /* "real" vnode operations */ 273 int (**puffs_msgop_p)(void *); 274 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 275 { &vop_default_desc, vn_default_error }, 276 { &vop_create_desc, puffs_create }, /* create */ 277 { &vop_mknod_desc, puffs_mknod }, /* mknod */ 278 { &vop_open_desc, puffs_open }, /* open */ 279 { &vop_close_desc, puffs_close }, /* close */ 280 { &vop_access_desc, puffs_access }, /* access */ 281 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 282 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 283 { &vop_read_desc, puffs_read }, /* read */ 284 { &vop_write_desc, puffs_write }, /* write */ 285 { &vop_fcntl_desc, puffs_fcntl }, /* fcntl */ 286 { &vop_ioctl_desc, puffs_ioctl }, /* ioctl */ 287 { &vop_fsync_desc, puffs_fsync }, /* fsync */ 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, genfs_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), VPTOPNC(dvp), LOCKEDVP(dvp), NULL); 459 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 460 461 /* 462 * In case of error, there is no new vnode to play with, so be 463 * happy with the NULL value given to vpp in the beginning. 464 * Also, check if this really was an error or the target was not 465 * present. Either treat it as a non-error for CREATE/RENAME or 466 * enter the component into the negative name cache (if desired). 467 */ 468 if (error) { 469 if (error == ENOENT) { 470 if ((cnp->cn_flags & ISLASTCN) 471 && (cnp->cn_nameiop == CREATE 472 || cnp->cn_nameiop == RENAME)) { 473 cnp->cn_flags |= SAVENAME; 474 error = EJUSTRETURN; 475 } else { 476 if ((cnp->cn_flags & MAKEENTRY) 477 && PUFFS_DOCACHE(pmp)) 478 cache_enter(dvp, NULL, cnp); 479 } 480 } else { 481 error = ENOENT; 482 } 483 goto errout; 484 } 485 486 /* 487 * Check that we don't get our parent node back, that would cause 488 * a pretty obvious deadlock. 489 */ 490 dpn = dvp->v_data; 491 if (lookup_arg.pvnr_newnode == dpn->pn_cookie) { 492 error = EINVAL; 493 goto errout; 494 } 495 496 /* XXX: race here */ 497 /* XXX2: this check for node existence twice */ 498 vp = puffs_pnode2vnode(pmp, lookup_arg.pvnr_newnode, 1); 499 if (!vp) { 500 error = puffs_getvnode(dvp->v_mount, 501 lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype, 502 lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp); 503 if (error) { 504 goto errout; 505 } 506 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 507 } 508 *ap->a_vpp = vp; 509 510 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_DOCACHE(pmp)) 511 cache_enter(dvp, vp, cnp); 512 513 errout: 514 if (cnp->cn_flags & ISDOTDOT) 515 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 516 517 return error; 518 } 519 520 int 521 puffs_create(void *v) 522 { 523 struct vop_create_args /* { 524 const struct vnodeop_desc *a_desc; 525 struct vnode *a_dvp; 526 struct vnode **a_vpp; 527 struct componentname *a_cnp; 528 struct vattr *a_vap; 529 } */ *ap = v; 530 int error; 531 532 PUFFS_VNREQ(create); 533 534 puffs_makecn(&create_arg.pvnr_cn, ap->a_cnp); 535 create_arg.pvnr_va = *ap->a_vap; 536 537 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_CREATE, 538 &create_arg, sizeof(create_arg), VPTOPNC(ap->a_dvp), 539 ap->a_dvp, NULL); 540 if (error) 541 goto out; 542 543 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 544 create_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 0); 545 546 out: 547 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 548 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 549 vput(ap->a_dvp); 550 return error; 551 } 552 553 int 554 puffs_mknod(void *v) 555 { 556 struct vop_mknod_args /* { 557 const struct vnodeop_desc *a_desc; 558 struct vnode *a_dvp; 559 struct vnode **a_vpp; 560 struct componentname *a_cnp; 561 struct vattr *a_vap; 562 } */ *ap = v; 563 int error; 564 565 PUFFS_VNREQ(mknod); 566 567 puffs_makecn(&mknod_arg.pvnr_cn, ap->a_cnp); 568 mknod_arg.pvnr_va = *ap->a_vap; 569 570 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKNOD, 571 &mknod_arg, sizeof(mknod_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 572 if (error) 573 goto out; 574 575 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 576 mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 577 ap->a_vap->va_rdev); 578 579 out: 580 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 581 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 582 vput(ap->a_dvp); 583 return error; 584 } 585 586 int 587 puffs_open(void *v) 588 { 589 struct vop_open_args /* { 590 const struct vnodeop_desc *a_desc; 591 struct vnode *a_vp; 592 int a_mode; 593 kauth_cred_t a_cred; 594 struct lwp *a_l; 595 } */ *ap = v; 596 struct vnode *vp = ap->a_vp; 597 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 598 int mode = ap->a_mode; 599 600 PUFFS_VNREQ(open); 601 602 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 603 return EROFS; 604 605 if (!EXISTSOP(pmp, OPEN)) 606 return 0; 607 608 open_arg.pvnr_mode = mode; 609 puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred); 610 open_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 611 612 return puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_OPEN, 613 &open_arg, sizeof(open_arg), VPTOPNC(vp), vp, NULL); 614 } 615 616 int 617 puffs_close(void *v) 618 { 619 struct vop_close_args /* { 620 const struct vnodeop_desc *a_desc; 621 struct vnode *a_vp; 622 int a_fflag; 623 kauth_cred_t a_cred; 624 struct lwp *a_l; 625 } */ *ap = v; 626 627 PUFFS_VNREQ(close); 628 629 close_arg.pvnr_fflag = ap->a_fflag; 630 puffs_credcvt(&close_arg.pvnr_cred, ap->a_cred); 631 close_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 632 633 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 634 &close_arg, sizeof(close_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 635 } 636 637 int 638 puffs_access(void *v) 639 { 640 struct vop_access_args /* { 641 const struct vnodeop_desc *a_desc; 642 struct vnode *a_vp; 643 int a_mode; 644 kauth_cred_t a_cred; 645 struct lwp *a_l; 646 } */ *ap = v; 647 struct vnode *vp = ap->a_vp; 648 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 649 int mode = ap->a_mode; 650 651 PUFFS_VNREQ(access); 652 653 if (vp->v_type == VREG && mode & VWRITE && !EXISTSOP(pmp, WRITE)) 654 return EROFS; 655 656 if (!EXISTSOP(pmp, ACCESS)) 657 return 0; 658 659 access_arg.pvnr_mode = ap->a_mode; 660 access_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 661 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 662 663 return puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_ACCESS, 664 &access_arg, sizeof(access_arg), VPTOPNC(vp), vp, NULL); 665 } 666 667 int 668 puffs_getattr(void *v) 669 { 670 struct vop_getattr_args /* { 671 const struct vnodeop_desc *a_desc; 672 struct vnode *a_vp; 673 struct vattr *a_vap; 674 kauth_cred_t a_cred; 675 struct lwp *a_l; 676 } */ *ap = v; 677 struct mount *mp; 678 int error; 679 680 PUFFS_VNREQ(getattr); 681 682 mp = ap->a_vp->v_mount; 683 684 vattr_null(&getattr_arg.pvnr_va); 685 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 686 getattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 687 688 /* 689 * XXX + XX (dos equis): this can't go through the unlock/lock 690 * cycle, since it can be called from uvn_attach(), which fiddles 691 * around with VXLOCK and therefore breaks vn_lock(). Proper 692 * fix pending. 693 */ 694 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_GETATTR, 695 &getattr_arg, sizeof(getattr_arg), VPTOPNC(ap->a_vp), 696 NULL /* XXXseeabove: should be LOCKEDVP(ap->a_vp) */, NULL); 697 if (error) 698 return error; 699 700 (void)memcpy(ap->a_vap, &getattr_arg.pvnr_va, sizeof(struct vattr)); 701 702 /* 703 * fill in information userspace does not have 704 * XXX: but would it be better to do fsid at the generic level? 705 */ 706 ap->a_vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 707 708 return 0; 709 } 710 711 int 712 puffs_setattr(void *v) 713 { 714 struct vop_getattr_args /* { 715 const struct vnodeop_desc *a_desc; 716 struct vnode *a_vp; 717 struct vattr *a_vap; 718 kauth_cred_t a_cred; 719 struct lwp *a_l; 720 } */ *ap = v; 721 int error; 722 723 PUFFS_VNREQ(setattr); 724 725 (void)memcpy(&setattr_arg.pvnr_va, ap->a_vap, sizeof(struct vattr)); 726 puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred); 727 setattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 728 729 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR, 730 &setattr_arg, sizeof(setattr_arg), VPTOPNC(ap->a_vp), 731 ap->a_vp, NULL); 732 if (error) 733 return error; 734 735 if (ap->a_vap->va_size != VNOVAL) 736 uvm_vnp_setsize(ap->a_vp, ap->a_vap->va_size); 737 738 return 0; 739 } 740 741 int 742 puffs_inactive(void *v) 743 { 744 struct vop_inactive_args /* { 745 const struct vnodeop_desc *a_desc; 746 struct vnode *a_vp; 747 struct lwp *a_l; 748 } */ *ap = v; 749 struct puffs_mount *pmp; 750 struct puffs_node *pnode; 751 int rv, vnrefs; 752 753 PUFFS_VNREQ(inactive); 754 755 /* 756 * XXX: think about this after we really start unlocking 757 * when going to userspace 758 */ 759 pnode = ap->a_vp->v_data; 760 761 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 762 763 inactive_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 764 765 if (EXISTSOP(pmp, INACTIVE)) 766 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 767 &inactive_arg, sizeof(inactive_arg), VPTOPNC(ap->a_vp), 768 ap->a_vp, NULL); 769 else 770 rv = 1; /* see below */ 771 772 /* can't trust userspace return value? simulate safe answer */ 773 if (rv) 774 vnrefs = 1; 775 else 776 vnrefs = inactive_arg.pvnr_backendrefs; 777 778 VOP_UNLOCK(ap->a_vp, 0); 779 780 /* 781 * user server thinks it's gone? then don't be afraid care, 782 * node's life was already all it would ever be 783 */ 784 if (vnrefs == 0) { 785 pnode->pn_stat |= PNODE_NOREFS; 786 vrecycle(ap->a_vp, NULL, ap->a_l); 787 } 788 789 return 0; 790 } 791 792 /* 793 * always FAF, we don't really care if the server wants to fail to 794 * reclaim the node or not 795 */ 796 int 797 puffs_reclaim(void *v) 798 { 799 struct vop_reclaim_args /* { 800 const struct vnodeop_desc *a_desc; 801 struct vnode *a_vp; 802 struct lwp *a_l; 803 } */ *ap = v; 804 struct puffs_mount *pmp; 805 struct puffs_vnreq_reclaim *reclaim_argp; 806 807 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 808 809 /* 810 * first things first: check if someone is trying to reclaim the 811 * root vnode. do not allow that to travel to userspace. 812 * Note that we don't need to take the lock similarly to 813 * puffs_root(), since there is only one of us. 814 */ 815 if (ap->a_vp->v_flag & VROOT) { 816 simple_lock(&pmp->pmp_lock); 817 KASSERT(pmp->pmp_root != NULL); 818 pmp->pmp_root = NULL; 819 simple_unlock(&pmp->pmp_lock); 820 goto out; 821 } 822 823 if (!EXISTSOP(pmp, RECLAIM)) 824 goto out; 825 826 reclaim_argp = malloc(sizeof(struct puffs_vnreq_reclaim), 827 M_PUFFS, M_WAITOK | M_ZERO); 828 reclaim_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 829 830 puffs_vntouser_faf(pmp, PUFFS_VN_RECLAIM, 831 reclaim_argp, sizeof(struct puffs_vnreq_reclaim), 832 VPTOPNC(ap->a_vp)); 833 834 out: 835 if (PUFFS_DOCACHE(pmp)) 836 cache_purge(ap->a_vp); 837 puffs_putvnode(ap->a_vp); 838 839 return 0; 840 } 841 842 int 843 puffs_readdir(void *v) 844 { 845 struct vop_readdir_args /* { 846 const struct vnodeop_desc *a_desc; 847 struct vnode *a_vp; 848 struct uio *a_uio; 849 kauth_cred_t a_cred; 850 int *a_eofflag; 851 off_t **a_cookies; 852 int *a_ncookies; 853 } */ *ap = v; 854 struct puffs_vnreq_readdir *readdir_argp; 855 size_t argsize; 856 struct uio *uio = ap->a_uio; 857 size_t howmuch; 858 int error; 859 860 /* worry about these later */ 861 if (!(ap->a_cookies == NULL && ap->a_ncookies == NULL)) 862 return EOPNOTSUPP; 863 864 argsize = sizeof(struct puffs_vnreq_readdir); 865 readdir_argp = malloc(argsize, M_PUFFS, M_ZERO | M_WAITOK); 866 867 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 868 readdir_argp->pvnr_offset = uio->uio_offset; 869 readdir_argp->pvnr_resid = uio->uio_resid; 870 871 error = puffs_vntouser_adjbuf(MPTOPUFFSMP(ap->a_vp->v_mount), 872 PUFFS_VN_READDIR, (void **)&readdir_argp, &argsize, 873 readdir_argp->pvnr_resid, VPTOPNC(ap->a_vp), ap->a_vp, NULL); 874 if (error) 875 goto out; 876 877 /* userspace is cheating? */ 878 if (readdir_argp->pvnr_resid > uio->uio_resid) { 879 error = EINVAL; 880 goto out; 881 } 882 883 /* bouncy-wouncy with the directory data */ 884 howmuch = uio->uio_resid - readdir_argp->pvnr_resid; 885 /* XXX: we could let userlandia tell its opinion first time 'round */ 886 if (howmuch == 0) { 887 *ap->a_eofflag = 1; 888 goto out; 889 } 890 error = uiomove(readdir_argp->pvnr_dent, howmuch, uio); 891 if (error) 892 goto out; 893 uio->uio_offset = readdir_argp->pvnr_offset; 894 895 out: 896 free(readdir_argp, M_PUFFS); 897 return error; 898 } 899 900 int 901 puffs_poll(void *v) 902 { 903 struct vop_poll_args /* { 904 const struct vnodeop_desc *a_desc; 905 struct vnode *a_vp; 906 int a_events; 907 struct lwp *a_l; 908 }*/ *ap = v; 909 910 PUFFS_VNREQ(poll); 911 912 poll_arg.pvnr_events = ap->a_events; 913 poll_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 914 915 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_POLL, 916 &poll_arg, sizeof(poll_arg), VPTOPNC(ap->a_vp), NULL, NULL); 917 } 918 919 int 920 puffs_fsync(void *v) 921 { 922 struct vop_fsync_args /* { 923 const struct vnodeop_desc *a_desc; 924 struct vnode *a_vp; 925 kauth_cred_t a_cred; 926 int a_flags; 927 off_t a_offlo; 928 off_t a_offhi; 929 struct lwp *a_l; 930 } */ *ap = v; 931 struct puffs_mount *pmp; 932 struct puffs_vnreq_fsync *fsync_argp; 933 struct vnode *vp; 934 struct puffs_node *pn; 935 int pflags, error, dofaf; 936 937 PUFFS_VNREQ(fsync); 938 939 vp = ap->a_vp; 940 pn = VPTOPP(vp); 941 pmp = MPTOPUFFSMP(vp->v_mount); 942 943 pflags = PGO_CLEANIT; 944 if (ap->a_flags & FSYNC_WAIT) 945 pflags |= PGO_SYNCIO; 946 947 /* 948 * flush pages to avoid being overly dirty 949 */ 950 simple_lock(&vp->v_interlock); 951 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 952 round_page(ap->a_offhi), pflags); 953 if (error) 954 return error; 955 956 /* 957 * HELLO! We exit already here if the user server does not 958 * support fsync OR if we should call fsync for a node which 959 * has references neither in the kernel or the fs server. 960 * Otherwise we continue to issue fsync() forward. 961 */ 962 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_NOREFS)) 963 return 0; 964 965 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 966 /* 967 * We abuse VXLOCK to mean "vnode is going to die", so we issue 968 * only FAFs for those. Otherwise there's a danger of deadlock, 969 * since the execution context here might be the user server 970 * doing some operation on another fs, which in turn caused a 971 * vnode to be reclaimed from the freelist for this fs. 972 */ 973 if (dofaf == 0) { 974 simple_lock(&vp->v_interlock); 975 if (vp->v_flag & VXLOCK) 976 dofaf = 1; 977 simple_unlock(&vp->v_interlock); 978 } 979 980 if (dofaf == 0) { 981 fsync_argp = &fsync_arg; 982 } else { 983 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 984 M_PUFFS, M_ZERO | M_NOWAIT); 985 if (fsync_argp == NULL) 986 return ENOMEM; 987 } 988 989 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 990 fsync_argp->pvnr_flags = ap->a_flags; 991 fsync_argp->pvnr_offlo = ap->a_offlo; 992 fsync_argp->pvnr_offhi = ap->a_offhi; 993 fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 994 995 /* 996 * XXX: see comment at puffs_getattr about locking 997 * 998 * If we are not required to wait, do a FAF operation. 999 * Otherwise block here. 1000 */ 1001 if (dofaf == 0) { 1002 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1003 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 1004 VPTOPNC(vp), NULL /* XXXshouldbe: vp */, NULL); 1005 } else { 1006 /* FAF is always "succesful" */ 1007 error = 0; 1008 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1009 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 1010 VPTOPNC(vp)); 1011 } 1012 1013 return error; 1014 } 1015 1016 int 1017 puffs_seek(void *v) 1018 { 1019 struct vop_seek_args /* { 1020 const struct vnodeop_desc *a_desc; 1021 struct vnode *a_vp; 1022 off_t a_oldoff; 1023 off_t a_newoff; 1024 kauth_cred_t a_cred; 1025 } */ *ap = v; 1026 1027 PUFFS_VNREQ(seek); 1028 1029 seek_arg.pvnr_oldoff = ap->a_oldoff; 1030 seek_arg.pvnr_newoff = ap->a_newoff; 1031 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1032 1033 /* 1034 * XXX: seems like seek is called with an unlocked vp, but 1035 * it can't hurt to play safe 1036 */ 1037 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1038 &seek_arg, sizeof(seek_arg), VPTOPNC(ap->a_vp), 1039 LOCKEDVP(ap->a_vp), NULL); 1040 } 1041 1042 int 1043 puffs_remove(void *v) 1044 { 1045 struct vop_remove_args /* { 1046 const struct vnodeop_desc *a_desc; 1047 struct vnode *a_dvp; 1048 struct vnode *a_vp; 1049 struct componentname *a_cnp; 1050 } */ *ap = v; 1051 int error; 1052 1053 PUFFS_VNREQ(remove); 1054 1055 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1056 puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp); 1057 1058 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE, 1059 &remove_arg, sizeof(remove_arg), VPTOPNC(ap->a_dvp), 1060 ap->a_dvp, ap->a_vp); 1061 1062 vput(ap->a_vp); 1063 if (ap->a_dvp == ap->a_vp) 1064 vrele(ap->a_dvp); 1065 else 1066 vput(ap->a_dvp); 1067 1068 return error; 1069 } 1070 1071 int 1072 puffs_mkdir(void *v) 1073 { 1074 struct vop_mkdir_args /* { 1075 const struct vnodeop_desc *a_desc; 1076 struct vnode *a_dvp; 1077 struct vnode **a_vpp; 1078 struct componentname *a_cnp; 1079 struct vattr *a_vap; 1080 } */ *ap = v; 1081 int error; 1082 1083 PUFFS_VNREQ(mkdir); 1084 1085 puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp); 1086 mkdir_arg.pvnr_va = *ap->a_vap; 1087 1088 /* XXX: wouldn't need to relock dvp, but that's life */ 1089 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR, 1090 &mkdir_arg, sizeof(mkdir_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1091 if (error) 1092 goto out; 1093 1094 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1095 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1096 1097 out: 1098 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1099 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1100 vput(ap->a_dvp); 1101 return error; 1102 } 1103 1104 int 1105 puffs_rmdir(void *v) 1106 { 1107 struct vop_rmdir_args /* { 1108 const struct vnodeop_desc *a_desc; 1109 struct vnode *a_dvp; 1110 struct vnode *a_vp; 1111 struct componentname *a_cnp; 1112 } */ *ap = v; 1113 int error; 1114 1115 PUFFS_VNREQ(rmdir); 1116 1117 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1118 puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp); 1119 1120 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR, 1121 &rmdir_arg, sizeof(rmdir_arg), VPTOPNC(ap->a_dvp), 1122 ap->a_dvp, ap->a_vp); 1123 1124 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1125 1126 vput(ap->a_dvp); 1127 vput(ap->a_vp); 1128 1129 return error; 1130 } 1131 1132 int 1133 puffs_link(void *v) 1134 { 1135 struct vop_link_args /* { 1136 const struct vnodeop_desc *a_desc; 1137 struct vnode *a_dvp; 1138 struct vnode *a_vp; 1139 struct componentname *a_cnp; 1140 }*/ *ap = v; 1141 int error; 1142 1143 PUFFS_VNREQ(link); 1144 1145 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1146 puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp); 1147 1148 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK, 1149 &link_arg, sizeof(link_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1150 1151 vput(ap->a_dvp); 1152 1153 return error; 1154 } 1155 1156 int 1157 puffs_symlink(void *v) 1158 { 1159 struct vop_symlink_args /* { 1160 const struct vnodeop_desc *a_desc; 1161 struct vnode *a_dvp; 1162 struct vnode **a_vpp; 1163 struct componentname *a_cnp; 1164 struct vattr *a_vap; 1165 char *a_target; 1166 }*/ *ap = v; 1167 int error; 1168 1169 PUFFS_VNREQ(symlink); /* XXX: large structure */ 1170 1171 *ap->a_vpp = NULL; 1172 1173 puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp); 1174 symlink_arg.pvnr_va = *ap->a_vap; 1175 (void)strlcpy(symlink_arg.pvnr_link, ap->a_target, 1176 sizeof(symlink_arg.pvnr_link)); 1177 1178 /* XXX: don't need to relock parent */ 1179 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), 1180 PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg), 1181 VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1182 if (error) 1183 goto out; 1184 1185 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1186 symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0); 1187 1188 out: 1189 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1190 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1191 vput(ap->a_dvp); 1192 return error; 1193 } 1194 1195 int 1196 puffs_readlink(void *v) 1197 { 1198 struct vop_readlink_args /* { 1199 const struct vnodeop_desc *a_desc; 1200 struct vnode *a_vp; 1201 struct uio *a_uio; 1202 kauth_cred_t a_cred; 1203 } */ *ap = v; 1204 int error; 1205 1206 PUFFS_VNREQ(readlink); 1207 1208 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1209 readlink_arg.pvnr_linklen = sizeof(readlink_arg.pvnr_link); 1210 1211 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1212 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 1213 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1214 if (error) 1215 return error; 1216 1217 readlink_arg.pvnr_link[readlink_arg.pvnr_linklen] = '\0'; 1218 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1219 ap->a_uio); 1220 } 1221 1222 /* XXXXXXX: think about locking & userspace op delocking... */ 1223 int 1224 puffs_rename(void *v) 1225 { 1226 struct vop_rename_args /* { 1227 const struct vnodeop_desc *a_desc; 1228 struct vnode *a_fdvp; 1229 struct vnode *a_fvp; 1230 struct componentname *a_fcnp; 1231 struct vnode *a_tdvp; 1232 struct vnode *a_tvp; 1233 struct componentname *a_tcnp; 1234 }*/ *ap = v; 1235 int error; 1236 1237 PUFFS_VNREQ(rename); 1238 1239 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) { 1240 error = EXDEV; 1241 goto out; 1242 } 1243 1244 rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1245 rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1246 if (ap->a_tvp) 1247 rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1248 else 1249 rename_arg.pvnr_cookie_targ = NULL; 1250 puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp); 1251 puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp); 1252 1253 error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount), 1254 PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg), 1255 VPTOPNC(ap->a_fdvp), NULL, NULL); 1256 1257 out: 1258 if (ap->a_tvp != NULL) 1259 vput(ap->a_tvp); 1260 if (ap->a_tdvp == ap->a_tvp) 1261 vrele(ap->a_tdvp); 1262 else 1263 vput(ap->a_tdvp); 1264 1265 vrele(ap->a_fdvp); 1266 vrele(ap->a_fvp); 1267 1268 return error; 1269 } 1270 1271 int 1272 puffs_read(void *v) 1273 { 1274 struct vop_read_args /* { 1275 const struct vnodeop_desc *a_desc; 1276 struct vnode *a_vp; 1277 struct uio *a_uio; 1278 int a_ioflag; 1279 kauth_cred_t a_cred; 1280 } */ *ap = v; 1281 struct puffs_vnreq_read *read_argp; 1282 struct puffs_mount *pmp; 1283 struct vnode *vp; 1284 struct uio *uio; 1285 void *win; 1286 size_t tomove, argsize; 1287 vsize_t bytelen; 1288 int error, ubcflags; 1289 1290 uio = ap->a_uio; 1291 vp = ap->a_vp; 1292 read_argp = NULL; 1293 error = 0; 1294 pmp = MPTOPUFFSMP(vp->v_mount); 1295 1296 /* std sanity */ 1297 if (uio->uio_resid == 0) 1298 return 0; 1299 if (uio->uio_offset < 0) 1300 return EINVAL; 1301 1302 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1303 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1304 1305 ubcflags = 0; 1306 if (UBC_WANT_UNMAP(vp)) 1307 ubcflags = UBC_UNMAP; 1308 1309 while (uio->uio_resid > 0) { 1310 bytelen = MIN(uio->uio_resid, 1311 vp->v_size - uio->uio_offset); 1312 if (bytelen == 0) 1313 break; 1314 1315 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1316 &bytelen, advice, UBC_READ); 1317 error = uiomove(win, bytelen, uio); 1318 ubc_release(win, ubcflags); 1319 if (error) 1320 break; 1321 } 1322 1323 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1324 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1325 } else { 1326 /* 1327 * in case it's not a regular file or we're operating 1328 * uncached, do read in the old-fashioned style, 1329 * i.e. explicit read operations 1330 */ 1331 1332 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1333 argsize = sizeof(struct puffs_vnreq_read); 1334 read_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1335 1336 error = 0; 1337 while (uio->uio_resid > 0) { 1338 read_argp->pvnr_ioflag = ap->a_ioflag; 1339 read_argp->pvnr_resid = tomove; 1340 read_argp->pvnr_offset = uio->uio_offset; 1341 puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred); 1342 1343 argsize = sizeof(struct puffs_vnreq_read); 1344 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1345 (void **)&read_argp, &argsize, 1346 read_argp->pvnr_resid, VPTOPNC(ap->a_vp), 1347 ap->a_vp, NULL); 1348 if (error) 1349 break; 1350 1351 if (read_argp->pvnr_resid > tomove) { 1352 error = EINVAL; 1353 break; 1354 } 1355 1356 error = uiomove(read_argp->pvnr_data, 1357 tomove - read_argp->pvnr_resid, uio); 1358 1359 /* 1360 * in case the file is out of juice, resid from 1361 * userspace is != 0. and the error-case is 1362 * quite obvious 1363 */ 1364 if (error || read_argp->pvnr_resid) 1365 break; 1366 1367 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1368 } 1369 } 1370 1371 if (read_argp) 1372 free(read_argp, M_PUFFS); 1373 return error; 1374 } 1375 1376 int 1377 puffs_write(void *v) 1378 { 1379 struct vop_write_args /* { 1380 const struct vnodeop_desc *a_desc; 1381 struct vnode *a_vp; 1382 struct uio *a_uio; 1383 int a_ioflag; 1384 kauth_cred_t a_cred; 1385 }*/ *ap = v; 1386 struct puffs_vnreq_write *write_argp; 1387 struct puffs_mount *pmp; 1388 struct uio *uio; 1389 struct vnode *vp; 1390 void *win; 1391 size_t tomove, argsize; 1392 off_t oldoff, newoff, origoff; 1393 vsize_t bytelen; 1394 int error, uflags; 1395 int async, ubcflags; 1396 1397 vp = ap->a_vp; 1398 uio = ap->a_uio; 1399 async = vp->v_mount->mnt_flag & MNT_ASYNC; 1400 error = uflags = 0; 1401 write_argp = NULL; 1402 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1403 1404 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1405 ubcflags = 0; 1406 if (UBC_WANT_UNMAP(vp)) 1407 ubcflags = UBC_UNMAP; 1408 1409 /* 1410 * userspace *should* be allowed to control this, 1411 * but with UBC it's a bit unclear how to handle it 1412 */ 1413 if (ap->a_ioflag & IO_APPEND) 1414 uio->uio_offset = vp->v_size; 1415 1416 origoff = uio->uio_offset; 1417 while (uio->uio_resid > 0) { 1418 uflags |= PUFFS_UPDATECTIME; 1419 uflags |= PUFFS_UPDATEMTIME; 1420 oldoff = uio->uio_offset; 1421 bytelen = uio->uio_resid; 1422 1423 win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, 1424 UVM_ADV_NORMAL, UBC_WRITE); 1425 error = uiomove(win, bytelen, uio); 1426 1427 /* 1428 * did we grow the file? 1429 * XXX: should probably ask userspace to extend 1430 * it's idea of the *first* before growing it 1431 * here. Or we need some mechanism to "rollback" 1432 * in case putpages fails. 1433 */ 1434 newoff = oldoff + bytelen; 1435 if (vp->v_size < newoff) { 1436 uflags |= PUFFS_UPDATESIZE; 1437 uvm_vnp_setsize(vp, newoff); 1438 1439 /* 1440 * in case we couldn't copy data to the 1441 * window, zero it out so that we don't 1442 * have any random leftovers in there. 1443 */ 1444 if (error) 1445 memset(win, 0, bytelen); 1446 } 1447 1448 ubc_release(win, ubcflags); 1449 if (error) 1450 break; 1451 1452 /* ok, I really need to admit: why's this? */ 1453 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 1454 simple_lock(&vp->v_interlock); 1455 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1456 uio->uio_offset & ~0xffff, PGO_CLEANIT); 1457 if (error) 1458 break; 1459 } 1460 } 1461 1462 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1463 simple_lock(&vp->v_interlock); 1464 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1465 round_page(uio->uio_offset), 1466 PGO_CLEANIT | PGO_SYNCIO); 1467 } 1468 1469 puffs_updatenode(vp, uflags); 1470 } else { 1471 /* tomove is non-increasing */ 1472 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1473 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1474 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1475 1476 while (uio->uio_resid > 0) { 1477 write_argp->pvnr_ioflag = ap->a_ioflag; 1478 write_argp->pvnr_resid = tomove; 1479 write_argp->pvnr_offset = uio->uio_offset; 1480 puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred); 1481 error = uiomove(write_argp->pvnr_data, tomove, uio); 1482 if (error) 1483 break; 1484 1485 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1486 PUFFS_VN_WRITE, write_argp, argsize, 1487 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1488 if (error) { 1489 /* restore uiomove */ 1490 uio->uio_resid += tomove; 1491 uio->uio_offset -= tomove; 1492 break; 1493 } 1494 if (write_argp->pvnr_resid > tomove) { 1495 /* 1496 * XXX: correct file size is a mystery, 1497 * we can only guess 1498 */ 1499 error = EINVAL; 1500 break; 1501 } 1502 1503 /* adjust file size */ 1504 if (vp->v_size < uio->uio_offset) 1505 uvm_vnp_setsize(vp, uio->uio_offset); 1506 1507 /* didn't move everything? bad userspace. bail */ 1508 if (write_argp->pvnr_resid != 0) { 1509 uio->uio_resid += write_argp->pvnr_resid; 1510 uio->uio_offset -= write_argp->pvnr_resid; 1511 error = EIO; 1512 break; 1513 } 1514 1515 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1516 } 1517 } 1518 1519 if (write_argp) 1520 free(write_argp, M_PUFFS); 1521 return error; 1522 } 1523 1524 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1525 1526 #define FCNIOCTL_ARG_MAX 1<<16 1527 int 1528 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1529 { 1530 1531 /* currently not supported */ 1532 return EOPNOTSUPP; 1533 #if 0 1534 /* struct vop_ioctl_args { 1535 const struct vnodeop_desc *a_desc; 1536 struct vnode *a_vp; 1537 u_long a_command; 1538 void *a_data; 1539 int a_fflag; 1540 kauth_cred_t a_cred; 1541 struct lwp *a_l; 1542 }*ap = v; */ 1543 struct puffs_mount *pmp; 1544 struct puffs_sizepark pspark; 1545 void *kernbuf; 1546 size_t copylen; 1547 int error; 1548 1549 PUFFS_VNREQ(fcnioctl); 1550 1551 /* 1552 * Since this op gives the filesystem (almost) complete control on 1553 * how much it is allowed to copy from the calling process 1554 * address space, do not enable it by default, since it would 1555 * be a whopping security hole. 1556 */ 1557 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1558 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1559 return EINVAL; /* only shoe that fits */ 1560 1561 /* fill in sizereq and store it */ 1562 pspark.pkso_reqid = puffs_getreqid(pmp); 1563 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1564 pspark.pkso_copybuf = ap->a_data; 1565 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1566 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1567 1568 /* then fill in actual request and shoot it off */ 1569 fcnioctl_arg.pvnr_command = ap->a_command; 1570 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1571 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1572 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1573 1574 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1575 &fcnioctl_arg, sizeof(fcnioctl_arg), VPTOPNC(ap->a_vp), 1576 pspark.pkso_reqid, NULL, NULL); 1577 1578 /* if we don't need to copy data, we're done */ 1579 if (error || !fcnioctl_arg.pvnr_copyback) 1580 return error; 1581 1582 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1583 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1584 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1585 if (error) 1586 goto out; 1587 error = copyout(kernbuf, ap->a_data, copylen); 1588 1589 out: 1590 free(kernbuf, M_PUFFS); 1591 return error; 1592 #endif 1593 } 1594 1595 int 1596 puffs_ioctl(void *v) 1597 { 1598 1599 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1600 } 1601 1602 int 1603 puffs_fcntl(void *v) 1604 { 1605 1606 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1607 } 1608 1609 int 1610 puffs_print(void *v) 1611 { 1612 struct vop_print_args /* { 1613 struct vnode *a_vp; 1614 } */ *ap = v; 1615 struct puffs_mount *pmp; 1616 struct vnode *vp = ap->a_vp; 1617 struct puffs_node *pn = vp->v_data; 1618 1619 PUFFS_VNREQ(print); 1620 1621 pmp = MPTOPUFFSMP(vp->v_mount); 1622 1623 /* kernel portion */ 1624 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1625 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1626 if (vp->v_type == VFIFO) 1627 fifo_printinfo(vp); 1628 lockmgr_printinfo(&vp->v_lock); 1629 1630 /* userspace portion */ 1631 if (EXISTSOP(pmp, PRINT)) 1632 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1633 &print_arg, sizeof(print_arg), VPTOPNC(ap->a_vp), 1634 LOCKEDVP(ap->a_vp), NULL); 1635 1636 return 0; 1637 } 1638 1639 int 1640 puffs_pathconf(void *v) 1641 { 1642 struct vop_pathconf_args /* { 1643 const struct vnodeop_desc *a_desc; 1644 struct vnode *a_vp; 1645 int a_name; 1646 register_t *a_retval; 1647 } */ *ap = v; 1648 int error; 1649 1650 PUFFS_VNREQ(pathconf); 1651 1652 pathconf_arg.pvnr_name = ap->a_name; 1653 1654 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1655 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 1656 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1657 if (error) 1658 return error; 1659 1660 *ap->a_retval = pathconf_arg.pvnr_retval; 1661 1662 return 0; 1663 } 1664 1665 int 1666 puffs_advlock(void *v) 1667 { 1668 struct vop_advlock_args /* { 1669 const struct vnodeop_desc *a_desc; 1670 struct vnode *a_vp; 1671 void *a_id; 1672 int a_op; 1673 struct flock *a_fl; 1674 int a_flags; 1675 } */ *ap = v; 1676 int error; 1677 1678 PUFFS_VNREQ(advlock); 1679 1680 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1681 if (error) 1682 return error; 1683 advlock_arg.pvnr_id = ap->a_id; 1684 advlock_arg.pvnr_op = ap->a_op; 1685 advlock_arg.pvnr_flags = ap->a_flags; 1686 1687 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1688 &advlock_arg, sizeof(advlock_arg), VPTOPNC(ap->a_vp), NULL, NULL); 1689 } 1690 /* 1691 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1692 */ 1693 int 1694 puffs_strategy(void *v) 1695 { 1696 struct vop_strategy_args /* { 1697 const struct vnodeop_desc *a_desc; 1698 struct vnode *a_vp; 1699 struct buf *a_bp; 1700 } */ *ap = v; 1701 struct puffs_mount *pmp; 1702 struct vnode *vp = ap->a_vp; 1703 struct puffs_node *pn; 1704 struct puffs_vnreq_read *read_argp = NULL; 1705 struct puffs_vnreq_write *write_argp = NULL; 1706 struct buf *bp; 1707 size_t argsize; 1708 size_t tomove, moved; 1709 int error, dowritefaf; 1710 1711 pmp = MPTOPUFFSMP(vp->v_mount); 1712 bp = ap->a_bp; 1713 error = 0; 1714 dowritefaf = 0; 1715 pn = VPTOPP(vp); 1716 1717 if (((bp->b_flags & B_READ) && !EXISTSOP(pmp, READ)) 1718 || (((bp->b_flags & B_READ) == 0) && !EXISTSOP(pmp, WRITE))) { 1719 error = EOPNOTSUPP; 1720 goto out; 1721 } 1722 1723 /* 1724 * Short-circuit optimization: don't flush buffer in between 1725 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 1726 */ 1727 if (pn->pn_stat & PNODE_NOREFS) { 1728 bp->b_resid = 0; 1729 goto out; 1730 } 1731 1732 #ifdef DIAGNOSTIC 1733 if (bp->b_bcount > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1734 panic("puffs_strategy: wildly inappropriate buf bcount %d", 1735 bp->b_bcount); 1736 #endif 1737 1738 /* 1739 * See explanation for the necessity of a FAF in puffs_fsync. 1740 * 1741 * Also, do FAF in case we're suspending. 1742 * See puffs_vfsops.c:pageflush() 1743 * 1744 * XXgoddamnX: B_WRITE is a "pseudo flag" 1745 */ 1746 if ((bp->b_flags & B_READ) == 0) { 1747 simple_lock(&vp->v_interlock); 1748 if (vp->v_flag & VXLOCK) 1749 dowritefaf = 1; 1750 if (pn->pn_stat & PNODE_SUSPEND) 1751 dowritefaf = 1; 1752 simple_unlock(&vp->v_interlock); 1753 } 1754 1755 /* 1756 * If we're executing as the pagedaemon, do only FAF operations. 1757 * Otherwise the file server has too much power over the fate 1758 * of the entire kernel and things might end up looking like 1759 * in the song (well, almost anyway): 1760 * "sleep", said the pagedaemon 1761 * we are programmed to recv 1762 * you can deadlock any time you like 1763 * and you can never leave 1764 */ 1765 if (curproc == uvm.pagedaemon_proc) 1766 dowritefaf = 1; 1767 1768 #ifdef DIAGNOSTIC 1769 if (dowritefaf) 1770 KASSERT((bp->b_flags & B_READ) == 0); 1771 #endif 1772 1773 if (bp->b_flags & B_READ) { 1774 argsize = sizeof(struct puffs_vnreq_read); 1775 read_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 1776 if (read_argp == NULL) { 1777 error = ENOMEM; 1778 goto out; 1779 } 1780 1781 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 1782 1783 read_argp->pvnr_ioflag = 0; 1784 read_argp->pvnr_resid = tomove; 1785 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1786 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1787 1788 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1789 (void **)&read_argp, &argsize, read_argp->pvnr_resid, 1790 VPTOPNC(vp), LOCKEDVP(vp), NULL); 1791 1792 if (error) 1793 goto out; 1794 1795 if (read_argp->pvnr_resid > tomove) { 1796 error = EINVAL; 1797 goto out; 1798 } 1799 1800 moved = tomove - read_argp->pvnr_resid; 1801 1802 (void)memcpy(bp->b_data, read_argp->pvnr_data, moved); 1803 bp->b_resid = bp->b_bcount - moved; 1804 } else { 1805 argsize = sizeof(struct puffs_vnreq_write) + bp->b_bcount; 1806 write_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 1807 if (write_argp == NULL) { 1808 error = ENOMEM; 1809 goto out; 1810 } 1811 1812 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 1813 1814 write_argp->pvnr_ioflag = 0; 1815 write_argp->pvnr_resid = tomove; 1816 write_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1817 puffs_credcvt(&write_argp->pvnr_cred, FSCRED); 1818 1819 (void)memcpy(&write_argp->pvnr_data, bp->b_data, tomove); 1820 1821 if (dowritefaf) { 1822 /* 1823 * assume FAF moves everything. frankly, we don't 1824 * really have a choice. 1825 */ 1826 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1827 PUFFS_VN_WRITE, write_argp, argsize, VPTOPNC(vp)); 1828 bp->b_resid = bp->b_bcount - tomove; 1829 } else { 1830 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1831 PUFFS_VN_WRITE, write_argp, argsize, VPTOPNC(vp), 1832 vp, NULL); 1833 if (error) 1834 goto out; 1835 1836 moved = tomove - write_argp->pvnr_resid; 1837 if (write_argp->pvnr_resid > tomove) { 1838 error = EINVAL; 1839 goto out; 1840 } 1841 1842 bp->b_resid = bp->b_bcount - moved; 1843 if (write_argp->pvnr_resid != 0) 1844 error = EIO; 1845 } 1846 } 1847 1848 out: 1849 if (read_argp) 1850 free(read_argp, M_PUFFS); 1851 if (write_argp && !dowritefaf) 1852 free(write_argp, M_PUFFS); 1853 1854 if (error) { 1855 bp->b_error = error; 1856 bp->b_flags |= B_ERROR; 1857 } 1858 1859 biodone(bp); 1860 return error; 1861 } 1862 1863 int 1864 puffs_mmap(void *v) 1865 { 1866 struct vop_mmap_args /* { 1867 const struct vnodeop_desc *a_desc; 1868 struct vnode *a_vp; 1869 int a_fflags; 1870 kauth_cred_t a_cred; 1871 struct lwp *a_l; 1872 } */ *ap = v; 1873 struct puffs_mount *pmp; 1874 int error; 1875 1876 PUFFS_VNREQ(mmap); 1877 1878 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1879 1880 if (!PUFFS_DOCACHE(pmp)) 1881 return genfs_eopnotsupp(v); 1882 1883 if (EXISTSOP(pmp, MMAP)) { 1884 mmap_arg.pvnr_fflags = ap->a_fflags; 1885 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 1886 mmap_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1887 1888 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 1889 &mmap_arg, sizeof(mmap_arg), 1890 VPTOPNC(ap->a_vp), NULL, NULL); 1891 } else { 1892 error = genfs_mmap(v); 1893 } 1894 1895 return error; 1896 } 1897 1898 1899 /* 1900 * The rest don't get a free trip to userspace and back, they 1901 * have to stay within the kernel. 1902 */ 1903 1904 /* 1905 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 1906 * well, maybe somehow, somewhere, some day .... 1907 */ 1908 int 1909 puffs_bmap(void *v) 1910 { 1911 struct vop_bmap_args /* { 1912 const struct vnodeop_desc *a_desc; 1913 struct vnode *a_vp; 1914 daddr_t a_bn; 1915 struct vnode **a_vpp; 1916 daddr_t *a_bnp; 1917 int *a_runp; 1918 } */ *ap = v; 1919 struct puffs_mount *pmp; 1920 1921 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1922 1923 if (ap->a_vpp) 1924 *ap->a_vpp = ap->a_vp; 1925 if (ap->a_bnp) 1926 *ap->a_bnp = ap->a_bn; 1927 if (ap->a_runp) 1928 *ap->a_runp = pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX; 1929 1930 return 0; 1931 } 1932 1933 1934 int 1935 puffs_lock(void *v) 1936 { 1937 struct vop_lock_args /* { 1938 struct vnode *a_vp; 1939 int a_flags; 1940 }*/ *ap = v; 1941 struct vnode *vp = ap->a_vp; 1942 struct mount *mp = vp->v_mount; 1943 1944 #if 0 1945 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1946 #endif 1947 1948 /* 1949 * XXX: this avoids deadlocking when we're suspending. 1950 * e.g. some ops holding the vnode lock might be blocked for 1951 * the vfs transaction lock so we'd deadlock. 1952 * 1953 * Now once again this is skating on the thin ice of modern life, 1954 * since we are breaking the consistency guarantee provided 1955 * _to the user server_ by vnode locking. Hopefully this will 1956 * get fixed soon enough by getting rid of the dependency on 1957 * vnode locks alltogether. 1958 */ 1959 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 1960 if (ap->a_flags & LK_INTERLOCK) 1961 simple_unlock(&vp->v_interlock); 1962 return 0; 1963 } 1964 1965 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 1966 } 1967 1968 int 1969 puffs_unlock(void *v) 1970 { 1971 struct vop_unlock_args /* { 1972 struct vnode *a_vp; 1973 int a_flags; 1974 } */ *ap = v; 1975 struct vnode *vp = ap->a_vp; 1976 struct mount *mp = vp->v_mount; 1977 1978 #if 0 1979 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1980 #endif 1981 1982 /* XXX: see puffs_lock() */ 1983 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 1984 if (ap->a_flags & LK_INTERLOCK) 1985 simple_unlock(&vp->v_interlock); 1986 return 0; 1987 } 1988 1989 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 1990 } 1991 1992 int 1993 puffs_islocked(void *v) 1994 { 1995 struct vop_islocked_args *ap = v; 1996 int rv; 1997 1998 rv = lockstatus(&ap->a_vp->v_lock); 1999 return rv; 2000 } 2001 2002 int 2003 puffs_generic(void *v) 2004 { 2005 struct vop_generic_args *ap = v; 2006 2007 (void)ap; 2008 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2009 2010 return EOPNOTSUPP; 2011 } 2012 2013 2014 /* 2015 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2016 * FAF update information for the puffs node first. 2017 */ 2018 int 2019 puffs_spec_read(void *v) 2020 { 2021 struct vop_read_args /* { 2022 const struct vnodeop_desc *a_desc; 2023 struct vnode *a_vp; 2024 struct uio *a_uio; 2025 int a_ioflag; 2026 kauth_cred_t a_cred; 2027 } */ *ap = v; 2028 2029 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2030 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2031 } 2032 2033 int 2034 puffs_spec_write(void *v) 2035 { 2036 struct vop_write_args /* { 2037 const struct vnodeop_desc *a_desc; 2038 struct vnode *a_vp; 2039 struct uio *a_uio; 2040 int a_ioflag; 2041 kauth_cred_t a_cred; 2042 }*/ *ap = v; 2043 2044 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2045 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2046 } 2047 2048 int 2049 puffs_fifo_read(void *v) 2050 { 2051 struct vop_read_args /* { 2052 const struct vnodeop_desc *a_desc; 2053 struct vnode *a_vp; 2054 struct uio *a_uio; 2055 int a_ioflag; 2056 kauth_cred_t a_cred; 2057 } */ *ap = v; 2058 2059 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2060 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2061 } 2062 2063 int 2064 puffs_fifo_write(void *v) 2065 { 2066 struct vop_write_args /* { 2067 const struct vnodeop_desc *a_desc; 2068 struct vnode *a_vp; 2069 struct uio *a_uio; 2070 int a_ioflag; 2071 kauth_cred_t a_cred; 2072 }*/ *ap = v; 2073 2074 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2075 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2076 } 2077
Indexes created Tue Sep 30 20:09:53 GMT 2025