puffs_vnops.c revision 1.60
1 /* $NetBSD: puffs_vnops.c,v 1.60 2007/04/20 11:36:25 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 1.60 2007/04/20 11:36:25 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; 644 645 PUFFS_VNREQ(close); 646 647 close_arg.pvnr_fflag = ap->a_fflag; 648 puffs_credcvt(&close_arg.pvnr_cred, ap->a_cred); 649 close_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 650 651 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 652 &close_arg, sizeof(close_arg), 0, VPTOPNC(ap->a_vp), 653 ap->a_vp, NULL); 654 } 655 656 int 657 puffs_access(void *v) 658 { 659 struct vop_access_args /* { 660 const struct vnodeop_desc *a_desc; 661 struct vnode *a_vp; 662 int a_mode; 663 kauth_cred_t a_cred; 664 struct lwp *a_l; 665 } */ *ap = v; 666 struct vnode *vp = ap->a_vp; 667 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 668 int mode = ap->a_mode; 669 670 PUFFS_VNREQ(access); 671 672 if (vp->v_type == VREG && mode & VWRITE && !EXISTSOP(pmp, WRITE)) 673 return EROFS; 674 675 if (!EXISTSOP(pmp, ACCESS)) 676 return 0; 677 678 access_arg.pvnr_mode = ap->a_mode; 679 access_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 680 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 681 682 return puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_ACCESS, 683 &access_arg, sizeof(access_arg), 0, VPTOPNC(vp), vp, NULL); 684 } 685 686 int 687 puffs_getattr(void *v) 688 { 689 struct vop_getattr_args /* { 690 const struct vnodeop_desc *a_desc; 691 struct vnode *a_vp; 692 struct vattr *a_vap; 693 kauth_cred_t a_cred; 694 struct lwp *a_l; 695 } */ *ap = v; 696 struct mount *mp; 697 struct vnode *vp; 698 struct vattr *vap; 699 struct puffs_node *pn; 700 int error; 701 702 PUFFS_VNREQ(getattr); 703 704 vp = ap->a_vp; 705 mp = vp->v_mount; 706 vap = ap->a_vap; 707 708 vattr_null(&getattr_arg.pvnr_va); 709 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 710 getattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 711 712 /* 713 * XXX + XX (dos equis): this can't go through the unlock/lock 714 * cycle, since it can be called from uvn_attach(), which fiddles 715 * around with VXLOCK and therefore breaks vn_lock(). Proper 716 * fix pending. 717 */ 718 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_GETATTR, 719 &getattr_arg, sizeof(getattr_arg), 0, VPTOPNC(vp), 720 NULL /* XXXseeabove: should be LOCKEDVP(vp) */, NULL); 721 if (error) 722 return error; 723 724 (void) memcpy(vap, &getattr_arg.pvnr_va, sizeof(struct vattr)); 725 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 726 727 pn = VPTOPP(vp); 728 if (pn->pn_stat & PNODE_METACACHE_ATIME) 729 vap->va_atime = pn->pn_mc_atime; 730 if (pn->pn_stat & PNODE_METACACHE_CTIME) 731 vap->va_ctime = pn->pn_mc_ctime; 732 if (pn->pn_stat & PNODE_METACACHE_MTIME) 733 vap->va_mtime = pn->pn_mc_mtime; 734 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 735 vap->va_size = pn->pn_mc_size; 736 } else { 737 if (getattr_arg.pvnr_va.va_size != VNOVAL) 738 uvm_vnp_setsize(vp, getattr_arg.pvnr_va.va_size); 739 } 740 741 return 0; 742 } 743 744 int 745 puffs_setattr(void *v) 746 { 747 struct vop_getattr_args /* { 748 const struct vnodeop_desc *a_desc; 749 struct vnode *a_vp; 750 struct vattr *a_vap; 751 kauth_cred_t a_cred; 752 struct lwp *a_l; 753 } */ *ap = v; 754 int error; 755 756 PUFFS_VNREQ(setattr); 757 758 (void)memcpy(&setattr_arg.pvnr_va, ap->a_vap, sizeof(struct vattr)); 759 puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred); 760 setattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 761 762 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR, 763 &setattr_arg, sizeof(setattr_arg), 0, VPTOPNC(ap->a_vp), 764 ap->a_vp, NULL); 765 if (error) 766 return error; 767 768 if (ap->a_vap->va_size != VNOVAL) 769 uvm_vnp_setsize(ap->a_vp, ap->a_vap->va_size); 770 771 return 0; 772 } 773 774 int 775 puffs_inactive(void *v) 776 { 777 struct vop_inactive_args /* { 778 const struct vnodeop_desc *a_desc; 779 struct vnode *a_vp; 780 struct lwp *a_l; 781 } */ *ap = v; 782 struct puffs_mount *pmp; 783 struct puffs_node *pnode; 784 int rv, vnrefs; 785 786 PUFFS_VNREQ(inactive); 787 788 /* 789 * XXX: think about this after we really start unlocking 790 * when going to userspace 791 */ 792 pnode = ap->a_vp->v_data; 793 794 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 795 796 inactive_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 797 798 if (EXISTSOP(pmp, INACTIVE)) 799 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 800 &inactive_arg, sizeof(inactive_arg), 0, VPTOPNC(ap->a_vp), 801 ap->a_vp, NULL); 802 else 803 rv = 1; /* see below */ 804 805 /* can't trust userspace return value? simulate safe answer */ 806 if (rv) 807 vnrefs = 1; 808 else 809 vnrefs = inactive_arg.pvnr_backendrefs; 810 811 VOP_UNLOCK(ap->a_vp, 0); 812 813 /* 814 * user server thinks it's gone? then don't be afraid care, 815 * node's life was already all it would ever be 816 */ 817 if (vnrefs == 0) { 818 pnode->pn_stat |= PNODE_NOREFS; 819 vrecycle(ap->a_vp, NULL, ap->a_l); 820 } 821 822 return 0; 823 } 824 825 /* 826 * always FAF, we don't really care if the server wants to fail to 827 * reclaim the node or not 828 */ 829 int 830 puffs_reclaim(void *v) 831 { 832 struct vop_reclaim_args /* { 833 const struct vnodeop_desc *a_desc; 834 struct vnode *a_vp; 835 struct lwp *a_l; 836 } */ *ap = v; 837 struct puffs_mount *pmp; 838 struct puffs_vnreq_reclaim *reclaim_argp; 839 840 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 841 842 /* 843 * first things first: check if someone is trying to reclaim the 844 * root vnode. do not allow that to travel to userspace. 845 * Note that we don't need to take the lock similarly to 846 * puffs_root(), since there is only one of us. 847 */ 848 if (ap->a_vp->v_flag & VROOT) { 849 mutex_enter(&pmp->pmp_lock); 850 KASSERT(pmp->pmp_root != NULL); 851 pmp->pmp_root = NULL; 852 mutex_exit(&pmp->pmp_lock); 853 goto out; 854 } 855 856 if (!EXISTSOP(pmp, RECLAIM)) 857 goto out; 858 859 reclaim_argp = malloc(sizeof(struct puffs_vnreq_reclaim), 860 M_PUFFS, M_WAITOK | M_ZERO); 861 reclaim_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 862 863 puffs_vntouser_faf(pmp, PUFFS_VN_RECLAIM, 864 reclaim_argp, sizeof(struct puffs_vnreq_reclaim), 865 VPTOPNC(ap->a_vp)); 866 867 out: 868 if (PUFFS_DOCACHE(pmp)) 869 cache_purge(ap->a_vp); 870 puffs_putvnode(ap->a_vp); 871 872 return 0; 873 } 874 875 #define CSIZE sizeof(**ap->a_cookies) 876 int 877 puffs_readdir(void *v) 878 { 879 struct vop_readdir_args /* { 880 const struct vnodeop_desc *a_desc; 881 struct vnode *a_vp; 882 struct uio *a_uio; 883 kauth_cred_t a_cred; 884 int *a_eofflag; 885 off_t **a_cookies; 886 int *a_ncookies; 887 } */ *ap = v; 888 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 889 struct puffs_vnreq_readdir *readdir_argp; 890 size_t argsize, cookiemem, cookiesmax; 891 struct uio *uio = ap->a_uio; 892 size_t howmuch; 893 int error; 894 895 if (ap->a_cookies) { 896 KASSERT(ap->a_ncookies != NULL); 897 if (pmp->pmp_args.pa_fhsize == 0) 898 return EOPNOTSUPP; 899 cookiesmax = uio->uio_resid/_DIRENT_MINSIZE((struct dirent *)0); 900 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 901 } else { 902 cookiesmax = 0; 903 cookiemem = 0; 904 } 905 906 argsize = sizeof(struct puffs_vnreq_readdir) 907 + uio->uio_resid + cookiemem; 908 readdir_argp = malloc(argsize, M_PUFFS, M_ZERO | M_WAITOK); 909 910 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 911 readdir_argp->pvnr_offset = uio->uio_offset; 912 readdir_argp->pvnr_resid = uio->uio_resid; 913 readdir_argp->pvnr_ncookies = cookiesmax; 914 readdir_argp->pvnr_eofflag = 0; 915 readdir_argp->pvnr_dentoff = cookiemem; 916 917 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 918 PUFFS_VN_READDIR, readdir_argp, argsize, 919 uio->uio_resid + cookiemem, VPTOPNC(ap->a_vp), ap->a_vp, NULL); 920 if (error) 921 goto out; 922 923 /* userspace is cheating? */ 924 if (readdir_argp->pvnr_resid > uio->uio_resid 925 || readdir_argp->pvnr_ncookies > cookiesmax) { 926 error = EINVAL; 927 goto out; 928 } 929 930 /* check eof */ 931 if (readdir_argp->pvnr_eofflag) 932 *ap->a_eofflag = 1; 933 934 /* bouncy-wouncy with the directory data */ 935 howmuch = uio->uio_resid - readdir_argp->pvnr_resid; 936 937 /* force eof if no data was returned (getcwd() needs this) */ 938 if (howmuch == 0) { 939 *ap->a_eofflag = 1; 940 goto out; 941 } 942 943 error = uiomove(readdir_argp->pvnr_data + cookiemem, howmuch, uio); 944 if (error) 945 goto out; 946 947 /* provide cookies to caller if so desired */ 948 if (ap->a_cookies) { 949 *ap->a_cookies = malloc(readdir_argp->pvnr_ncookies*CSIZE, 950 M_TEMP, M_WAITOK); 951 *ap->a_ncookies = readdir_argp->pvnr_ncookies; 952 memcpy(*ap->a_cookies, readdir_argp->pvnr_data, 953 *ap->a_ncookies*CSIZE); 954 } 955 956 /* next readdir starts here */ 957 uio->uio_offset = readdir_argp->pvnr_offset; 958 959 out: 960 free(readdir_argp, M_PUFFS); 961 return error; 962 } 963 #undef CSIZE 964 965 int 966 puffs_poll(void *v) 967 { 968 struct vop_poll_args /* { 969 const struct vnodeop_desc *a_desc; 970 struct vnode *a_vp; 971 int a_events; 972 struct lwp *a_l; 973 }*/ *ap = v; 974 975 PUFFS_VNREQ(poll); 976 977 poll_arg.pvnr_events = ap->a_events; 978 poll_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 979 980 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_POLL, 981 &poll_arg, sizeof(poll_arg), 0, VPTOPNC(ap->a_vp), NULL, NULL); 982 } 983 984 int 985 puffs_fsync(void *v) 986 { 987 struct vop_fsync_args /* { 988 const struct vnodeop_desc *a_desc; 989 struct vnode *a_vp; 990 kauth_cred_t a_cred; 991 int a_flags; 992 off_t a_offlo; 993 off_t a_offhi; 994 struct lwp *a_l; 995 } */ *ap = v; 996 struct vattr va; 997 struct puffs_mount *pmp; 998 struct puffs_vnreq_fsync *fsync_argp; 999 struct vnode *vp; 1000 struct puffs_node *pn; 1001 int pflags, error, dofaf; 1002 1003 PUFFS_VNREQ(fsync); 1004 1005 vp = ap->a_vp; 1006 pn = VPTOPP(vp); 1007 pmp = MPTOPUFFSMP(vp->v_mount); 1008 1009 /* flush out information from our metacache */ 1010 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1011 vattr_null(&va); 1012 if (pn->pn_stat & PNODE_METACACHE_ATIME) 1013 va.va_atime = pn->pn_mc_atime; 1014 if (pn->pn_stat & PNODE_METACACHE_CTIME) 1015 va.va_ctime = pn->pn_mc_ctime; 1016 if (pn->pn_stat & PNODE_METACACHE_MTIME) 1017 va.va_mtime = pn->pn_mc_ctime; 1018 if (pn->pn_stat & PNODE_METACACHE_SIZE) 1019 va.va_size = pn->pn_mc_size; 1020 1021 error = VOP_SETATTR(vp, &va, FSCRED, NULL); 1022 if (error) 1023 return error; 1024 1025 pn->pn_stat &= ~PNODE_METACACHE_MASK; 1026 } 1027 1028 /* 1029 * flush pages to avoid being overly dirty 1030 */ 1031 pflags = PGO_CLEANIT; 1032 if (ap->a_flags & FSYNC_WAIT) 1033 pflags |= PGO_SYNCIO; 1034 simple_lock(&vp->v_interlock); 1035 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1036 round_page(ap->a_offhi), pflags); 1037 if (error) 1038 return error; 1039 1040 /* 1041 * HELLO! We exit already here if the user server does not 1042 * support fsync OR if we should call fsync for a node which 1043 * has references neither in the kernel or the fs server. 1044 * Otherwise we continue to issue fsync() forward. 1045 */ 1046 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_NOREFS)) 1047 return 0; 1048 1049 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1050 /* 1051 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1052 * only FAFs for those. Otherwise there's a danger of deadlock, 1053 * since the execution context here might be the user server 1054 * doing some operation on another fs, which in turn caused a 1055 * vnode to be reclaimed from the freelist for this fs. 1056 */ 1057 if (dofaf == 0) { 1058 simple_lock(&vp->v_interlock); 1059 if (vp->v_flag & VXLOCK) 1060 dofaf = 1; 1061 simple_unlock(&vp->v_interlock); 1062 } 1063 1064 if (dofaf == 0) { 1065 fsync_argp = &fsync_arg; 1066 } else { 1067 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 1068 M_PUFFS, M_ZERO | M_NOWAIT); 1069 if (fsync_argp == NULL) 1070 return ENOMEM; 1071 } 1072 1073 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 1074 fsync_argp->pvnr_flags = ap->a_flags; 1075 fsync_argp->pvnr_offlo = ap->a_offlo; 1076 fsync_argp->pvnr_offhi = ap->a_offhi; 1077 fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 1078 1079 /* 1080 * XXX: see comment at puffs_getattr about locking 1081 * 1082 * If we are not required to wait, do a FAF operation. 1083 * Otherwise block here. 1084 */ 1085 if (dofaf == 0) { 1086 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1087 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 0, 1088 VPTOPNC(vp), NULL /* XXXshouldbe: vp */, NULL); 1089 } else { 1090 /* FAF is always "succesful" */ 1091 error = 0; 1092 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1093 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 1094 VPTOPNC(vp)); 1095 } 1096 1097 return error; 1098 } 1099 1100 int 1101 puffs_seek(void *v) 1102 { 1103 struct vop_seek_args /* { 1104 const struct vnodeop_desc *a_desc; 1105 struct vnode *a_vp; 1106 off_t a_oldoff; 1107 off_t a_newoff; 1108 kauth_cred_t a_cred; 1109 } */ *ap = v; 1110 1111 PUFFS_VNREQ(seek); 1112 1113 seek_arg.pvnr_oldoff = ap->a_oldoff; 1114 seek_arg.pvnr_newoff = ap->a_newoff; 1115 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1116 1117 /* 1118 * XXX: seems like seek is called with an unlocked vp, but 1119 * it can't hurt to play safe 1120 */ 1121 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1122 &seek_arg, sizeof(seek_arg), 0, VPTOPNC(ap->a_vp), 1123 LOCKEDVP(ap->a_vp), NULL); 1124 } 1125 1126 int 1127 puffs_remove(void *v) 1128 { 1129 struct vop_remove_args /* { 1130 const struct vnodeop_desc *a_desc; 1131 struct vnode *a_dvp; 1132 struct vnode *a_vp; 1133 struct componentname *a_cnp; 1134 } */ *ap = v; 1135 int error; 1136 1137 PUFFS_VNREQ(remove); 1138 1139 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1140 puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp); 1141 1142 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE, 1143 &remove_arg, sizeof(remove_arg), 0, VPTOPNC(ap->a_dvp), 1144 ap->a_dvp, ap->a_vp); 1145 1146 vput(ap->a_vp); 1147 if (ap->a_dvp == ap->a_vp) 1148 vrele(ap->a_dvp); 1149 else 1150 vput(ap->a_dvp); 1151 1152 return error; 1153 } 1154 1155 int 1156 puffs_mkdir(void *v) 1157 { 1158 struct vop_mkdir_args /* { 1159 const struct vnodeop_desc *a_desc; 1160 struct vnode *a_dvp; 1161 struct vnode **a_vpp; 1162 struct componentname *a_cnp; 1163 struct vattr *a_vap; 1164 } */ *ap = v; 1165 int error; 1166 1167 PUFFS_VNREQ(mkdir); 1168 1169 puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp); 1170 mkdir_arg.pvnr_va = *ap->a_vap; 1171 1172 /* XXX: wouldn't need to relock dvp, but that's life */ 1173 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR, 1174 &mkdir_arg, sizeof(mkdir_arg), 0, VPTOPNC(ap->a_dvp), 1175 ap->a_dvp, NULL); 1176 if (error) 1177 goto out; 1178 1179 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1180 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1181 1182 out: 1183 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1184 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1185 vput(ap->a_dvp); 1186 return error; 1187 } 1188 1189 int 1190 puffs_rmdir(void *v) 1191 { 1192 struct vop_rmdir_args /* { 1193 const struct vnodeop_desc *a_desc; 1194 struct vnode *a_dvp; 1195 struct vnode *a_vp; 1196 struct componentname *a_cnp; 1197 } */ *ap = v; 1198 int error; 1199 1200 PUFFS_VNREQ(rmdir); 1201 1202 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1203 puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp); 1204 1205 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR, 1206 &rmdir_arg, sizeof(rmdir_arg), 0, VPTOPNC(ap->a_dvp), 1207 ap->a_dvp, ap->a_vp); 1208 1209 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1210 1211 vput(ap->a_dvp); 1212 vput(ap->a_vp); 1213 1214 return error; 1215 } 1216 1217 int 1218 puffs_link(void *v) 1219 { 1220 struct vop_link_args /* { 1221 const struct vnodeop_desc *a_desc; 1222 struct vnode *a_dvp; 1223 struct vnode *a_vp; 1224 struct componentname *a_cnp; 1225 }*/ *ap = v; 1226 int error; 1227 1228 PUFFS_VNREQ(link); 1229 1230 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1231 puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp); 1232 1233 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK, 1234 &link_arg, sizeof(link_arg), 0, VPTOPNC(ap->a_dvp), 1235 ap->a_dvp, NULL); 1236 1237 /* 1238 * XXX: stay in touch with the cache. I don't like this, but 1239 * don't have a better solution either. See also puffs_rename(). 1240 */ 1241 if (error == 0) 1242 puffs_updatenode(ap->a_vp, PUFFS_UPDATECTIME); 1243 1244 vput(ap->a_dvp); 1245 1246 return error; 1247 } 1248 1249 int 1250 puffs_symlink(void *v) 1251 { 1252 struct vop_symlink_args /* { 1253 const struct vnodeop_desc *a_desc; 1254 struct vnode *a_dvp; 1255 struct vnode **a_vpp; 1256 struct componentname *a_cnp; 1257 struct vattr *a_vap; 1258 char *a_target; 1259 }*/ *ap = v; 1260 int error; 1261 1262 PUFFS_VNREQ(symlink); /* XXX: large structure */ 1263 1264 *ap->a_vpp = NULL; 1265 1266 puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp); 1267 symlink_arg.pvnr_va = *ap->a_vap; 1268 (void)strlcpy(symlink_arg.pvnr_link, ap->a_target, 1269 sizeof(symlink_arg.pvnr_link)); 1270 1271 /* XXX: don't need to relock parent */ 1272 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), 1273 PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg), 0, 1274 VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1275 if (error) 1276 goto out; 1277 1278 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1279 symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0); 1280 1281 out: 1282 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1283 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1284 vput(ap->a_dvp); 1285 return error; 1286 } 1287 1288 int 1289 puffs_readlink(void *v) 1290 { 1291 struct vop_readlink_args /* { 1292 const struct vnodeop_desc *a_desc; 1293 struct vnode *a_vp; 1294 struct uio *a_uio; 1295 kauth_cred_t a_cred; 1296 } */ *ap = v; 1297 size_t linklen; 1298 int error; 1299 1300 PUFFS_VNREQ(readlink); 1301 1302 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1303 linklen = sizeof(readlink_arg.pvnr_link); 1304 readlink_arg.pvnr_linklen = linklen; 1305 1306 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1307 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 0, 1308 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1309 if (error) 1310 return error; 1311 1312 /* bad bad user file server */ 1313 if (readlink_arg.pvnr_linklen > linklen) 1314 return EINVAL; 1315 1316 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1317 ap->a_uio); 1318 } 1319 1320 /* XXXXXXX: think about locking & userspace op delocking... */ 1321 int 1322 puffs_rename(void *v) 1323 { 1324 struct vop_rename_args /* { 1325 const struct vnodeop_desc *a_desc; 1326 struct vnode *a_fdvp; 1327 struct vnode *a_fvp; 1328 struct componentname *a_fcnp; 1329 struct vnode *a_tdvp; 1330 struct vnode *a_tvp; 1331 struct componentname *a_tcnp; 1332 }*/ *ap = v; 1333 int error; 1334 1335 PUFFS_VNREQ(rename); 1336 1337 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) { 1338 error = EXDEV; 1339 goto out; 1340 } 1341 1342 rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1343 rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1344 if (ap->a_tvp) 1345 rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1346 else 1347 rename_arg.pvnr_cookie_targ = NULL; 1348 puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp); 1349 puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp); 1350 1351 error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount), 1352 PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg), 0, 1353 VPTOPNC(ap->a_fdvp), NULL, NULL); 1354 1355 /* 1356 * XXX: stay in touch with the cache. I don't like this, but 1357 * don't have a better solution either. See also puffs_link(). 1358 */ 1359 if (error == 0) 1360 puffs_updatenode(ap->a_fvp, PUFFS_UPDATECTIME); 1361 1362 out: 1363 if (ap->a_tvp != NULL) 1364 vput(ap->a_tvp); 1365 if (ap->a_tdvp == ap->a_tvp) 1366 vrele(ap->a_tdvp); 1367 else 1368 vput(ap->a_tdvp); 1369 1370 vrele(ap->a_fdvp); 1371 vrele(ap->a_fvp); 1372 1373 return error; 1374 } 1375 1376 int 1377 puffs_read(void *v) 1378 { 1379 struct vop_read_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_read *read_argp; 1387 struct puffs_mount *pmp; 1388 struct vnode *vp; 1389 struct uio *uio; 1390 void *win; 1391 size_t tomove, argsize; 1392 vsize_t bytelen; 1393 int error, ubcflags; 1394 1395 uio = ap->a_uio; 1396 vp = ap->a_vp; 1397 read_argp = NULL; 1398 error = 0; 1399 pmp = MPTOPUFFSMP(vp->v_mount); 1400 1401 /* std sanity */ 1402 if (uio->uio_resid == 0) 1403 return 0; 1404 if (uio->uio_offset < 0) 1405 return EINVAL; 1406 1407 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1408 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1409 1410 ubcflags = 0; 1411 if (UBC_WANT_UNMAP(vp)) 1412 ubcflags = UBC_UNMAP; 1413 1414 while (uio->uio_resid > 0) { 1415 bytelen = MIN(uio->uio_resid, 1416 vp->v_size - uio->uio_offset); 1417 if (bytelen == 0) 1418 break; 1419 1420 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1421 &bytelen, advice, UBC_READ); 1422 error = uiomove(win, bytelen, uio); 1423 ubc_release(win, ubcflags); 1424 if (error) 1425 break; 1426 } 1427 1428 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1429 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1430 } else { 1431 /* 1432 * in case it's not a regular file or we're operating 1433 * uncached, do read in the old-fashioned style, 1434 * i.e. explicit read operations 1435 */ 1436 1437 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1438 argsize = sizeof(struct puffs_vnreq_read); 1439 read_argp = malloc(argsize + tomove, 1440 M_PUFFS, M_WAITOK | M_ZERO); 1441 1442 error = 0; 1443 while (uio->uio_resid > 0) { 1444 read_argp->pvnr_ioflag = ap->a_ioflag; 1445 read_argp->pvnr_resid = tomove; 1446 read_argp->pvnr_offset = uio->uio_offset; 1447 puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred); 1448 1449 argsize = sizeof(struct puffs_vnreq_read); 1450 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1451 read_argp, argsize, tomove, 1452 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1453 if (error) 1454 break; 1455 1456 if (read_argp->pvnr_resid > tomove) { 1457 error = EINVAL; 1458 break; 1459 } 1460 1461 error = uiomove(read_argp->pvnr_data, 1462 tomove - read_argp->pvnr_resid, uio); 1463 1464 /* 1465 * in case the file is out of juice, resid from 1466 * userspace is != 0. and the error-case is 1467 * quite obvious 1468 */ 1469 if (error || read_argp->pvnr_resid) 1470 break; 1471 1472 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1473 } 1474 } 1475 1476 if (read_argp) 1477 free(read_argp, M_PUFFS); 1478 return error; 1479 } 1480 1481 int 1482 puffs_write(void *v) 1483 { 1484 struct vop_write_args /* { 1485 const struct vnodeop_desc *a_desc; 1486 struct vnode *a_vp; 1487 struct uio *a_uio; 1488 int a_ioflag; 1489 kauth_cred_t a_cred; 1490 }*/ *ap = v; 1491 struct puffs_vnreq_write *write_argp; 1492 struct puffs_mount *pmp; 1493 struct uio *uio; 1494 struct vnode *vp; 1495 void *win; 1496 size_t tomove, argsize; 1497 off_t oldoff, newoff, origoff; 1498 vsize_t bytelen; 1499 int error, uflags; 1500 int ubcflags; 1501 1502 vp = ap->a_vp; 1503 uio = ap->a_uio; 1504 error = uflags = 0; 1505 write_argp = NULL; 1506 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1507 1508 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1509 ubcflags = 0; 1510 if (UBC_WANT_UNMAP(vp)) 1511 ubcflags = UBC_UNMAP; 1512 1513 /* 1514 * userspace *should* be allowed to control this, 1515 * but with UBC it's a bit unclear how to handle it 1516 */ 1517 if (ap->a_ioflag & IO_APPEND) 1518 uio->uio_offset = vp->v_size; 1519 1520 origoff = uio->uio_offset; 1521 while (uio->uio_resid > 0) { 1522 uflags |= PUFFS_UPDATECTIME; 1523 uflags |= PUFFS_UPDATEMTIME; 1524 oldoff = uio->uio_offset; 1525 bytelen = uio->uio_resid; 1526 1527 win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, 1528 UVM_ADV_NORMAL, UBC_WRITE); 1529 error = uiomove(win, bytelen, uio); 1530 1531 /* 1532 * did we grow the file? 1533 * XXX: should probably ask userspace to extend 1534 * it's idea of the *first* before growing it 1535 * here. Or we need some mechanism to "rollback" 1536 * in case putpages fails. 1537 */ 1538 newoff = oldoff + bytelen; 1539 if (vp->v_size < newoff) { 1540 uflags |= PUFFS_UPDATESIZE; 1541 uvm_vnp_setsize(vp, newoff); 1542 1543 /* 1544 * in case we couldn't copy data to the 1545 * window, zero it out so that we don't 1546 * have any random leftovers in there. 1547 */ 1548 if (error) 1549 memset(win, 0, bytelen); 1550 } 1551 1552 ubc_release(win, ubcflags); 1553 if (error) 1554 break; 1555 1556 /* 1557 * If we're writing large files, flush to file server 1558 * every 64k. Otherwise we can very easily exhaust 1559 * kernel and user memory, as the file server cannot 1560 * really keep up with our writing speed. 1561 * 1562 * Note: this does *NOT* honor MNT_ASYNC, because 1563 * that gives userland too much say in the kernel. 1564 */ 1565 if (oldoff >> 16 != uio->uio_offset >> 16) { 1566 simple_lock(&vp->v_interlock); 1567 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1568 uio->uio_offset & ~0xffff, 1569 PGO_CLEANIT | PGO_SYNCIO); 1570 if (error) 1571 break; 1572 } 1573 } 1574 1575 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1576 simple_lock(&vp->v_interlock); 1577 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1578 round_page(uio->uio_offset), 1579 PGO_CLEANIT | PGO_SYNCIO); 1580 } 1581 1582 puffs_updatenode(vp, uflags); 1583 } else { 1584 /* tomove is non-increasing */ 1585 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1586 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1587 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1588 1589 while (uio->uio_resid > 0) { 1590 write_argp->pvnr_ioflag = ap->a_ioflag; 1591 write_argp->pvnr_resid = tomove; 1592 write_argp->pvnr_offset = uio->uio_offset; 1593 puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred); 1594 error = uiomove(write_argp->pvnr_data, tomove, uio); 1595 if (error) 1596 break; 1597 1598 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1599 PUFFS_VN_WRITE, write_argp, argsize, 0, 1600 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1601 if (error) { 1602 /* restore uiomove */ 1603 uio->uio_resid += tomove; 1604 uio->uio_offset -= tomove; 1605 break; 1606 } 1607 if (write_argp->pvnr_resid > tomove) { 1608 /* 1609 * XXX: correct file size is a mystery, 1610 * we can only guess 1611 */ 1612 error = EINVAL; 1613 break; 1614 } 1615 1616 /* adjust file size */ 1617 if (vp->v_size < uio->uio_offset) 1618 uvm_vnp_setsize(vp, uio->uio_offset); 1619 1620 /* didn't move everything? bad userspace. bail */ 1621 if (write_argp->pvnr_resid != 0) { 1622 uio->uio_resid += write_argp->pvnr_resid; 1623 uio->uio_offset -= write_argp->pvnr_resid; 1624 error = EIO; 1625 break; 1626 } 1627 1628 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1629 } 1630 } 1631 1632 if (write_argp) 1633 free(write_argp, M_PUFFS); 1634 return error; 1635 } 1636 1637 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1638 1639 #define FCNIOCTL_ARG_MAX 1<<16 1640 int 1641 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1642 { 1643 1644 /* currently not supported */ 1645 return EOPNOTSUPP; 1646 #if 0 1647 /* struct vop_ioctl_args { 1648 const struct vnodeop_desc *a_desc; 1649 struct vnode *a_vp; 1650 u_long a_command; 1651 void *a_data; 1652 int a_fflag; 1653 kauth_cred_t a_cred; 1654 struct lwp *a_l; 1655 }*ap = v; */ 1656 struct puffs_mount *pmp; 1657 struct puffs_sizepark pspark; 1658 void *kernbuf; 1659 size_t copylen; 1660 int error; 1661 1662 PUFFS_VNREQ(fcnioctl); 1663 1664 /* 1665 * Since this op gives the filesystem (almost) complete control on 1666 * how much it is allowed to copy from the calling process 1667 * address space, do not enable it by default, since it would 1668 * be a whopping security hole. 1669 */ 1670 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1671 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1672 return EINVAL; /* only shoe that fits */ 1673 1674 /* fill in sizereq and store it */ 1675 pspark.pkso_reqid = puffs_getreqid(pmp); 1676 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1677 pspark.pkso_copybuf = ap->a_data; 1678 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1679 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1680 1681 /* then fill in actual request and shoot it off */ 1682 fcnioctl_arg.pvnr_command = ap->a_command; 1683 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1684 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1685 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1686 1687 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1688 &fcnioctl_arg, sizeof(fcnioctl_arg), 0, VPTOPNC(ap->a_vp), 1689 pspark.pkso_reqid, NULL, NULL); 1690 1691 /* if we don't need to copy data, we're done */ 1692 if (error || !fcnioctl_arg.pvnr_copyback) 1693 return error; 1694 1695 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1696 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1697 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1698 if (error) 1699 goto out; 1700 error = copyout(kernbuf, ap->a_data, copylen); 1701 1702 out: 1703 free(kernbuf, M_PUFFS); 1704 return error; 1705 #endif 1706 } 1707 1708 int 1709 puffs_ioctl(void *v) 1710 { 1711 1712 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1713 } 1714 1715 int 1716 puffs_fcntl(void *v) 1717 { 1718 1719 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1720 } 1721 1722 int 1723 puffs_print(void *v) 1724 { 1725 struct vop_print_args /* { 1726 struct vnode *a_vp; 1727 } */ *ap = v; 1728 struct puffs_mount *pmp; 1729 struct vnode *vp = ap->a_vp; 1730 struct puffs_node *pn = vp->v_data; 1731 1732 PUFFS_VNREQ(print); 1733 1734 pmp = MPTOPUFFSMP(vp->v_mount); 1735 1736 /* kernel portion */ 1737 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1738 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1739 if (vp->v_type == VFIFO) 1740 fifo_printinfo(vp); 1741 lockmgr_printinfo(&vp->v_lock); 1742 1743 /* userspace portion */ 1744 if (EXISTSOP(pmp, PRINT)) 1745 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1746 &print_arg, sizeof(print_arg), 0, VPTOPNC(ap->a_vp), 1747 LOCKEDVP(ap->a_vp), NULL); 1748 1749 return 0; 1750 } 1751 1752 int 1753 puffs_pathconf(void *v) 1754 { 1755 struct vop_pathconf_args /* { 1756 const struct vnodeop_desc *a_desc; 1757 struct vnode *a_vp; 1758 int a_name; 1759 register_t *a_retval; 1760 } */ *ap = v; 1761 int error; 1762 1763 PUFFS_VNREQ(pathconf); 1764 1765 pathconf_arg.pvnr_name = ap->a_name; 1766 1767 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1768 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 0, 1769 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1770 if (error) 1771 return error; 1772 1773 *ap->a_retval = pathconf_arg.pvnr_retval; 1774 1775 return 0; 1776 } 1777 1778 int 1779 puffs_advlock(void *v) 1780 { 1781 struct vop_advlock_args /* { 1782 const struct vnodeop_desc *a_desc; 1783 struct vnode *a_vp; 1784 void *a_id; 1785 int a_op; 1786 struct flock *a_fl; 1787 int a_flags; 1788 } */ *ap = v; 1789 int error; 1790 1791 PUFFS_VNREQ(advlock); 1792 1793 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1794 if (error) 1795 return error; 1796 advlock_arg.pvnr_id = ap->a_id; 1797 advlock_arg.pvnr_op = ap->a_op; 1798 advlock_arg.pvnr_flags = ap->a_flags; 1799 1800 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1801 &advlock_arg, sizeof(advlock_arg), 0, VPTOPNC(ap->a_vp), 1802 NULL, NULL); 1803 } 1804 /* 1805 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1806 */ 1807 int 1808 puffs_strategy(void *v) 1809 { 1810 struct vop_strategy_args /* { 1811 const struct vnodeop_desc *a_desc; 1812 struct vnode *a_vp; 1813 struct buf *a_bp; 1814 } */ *ap = v; 1815 struct puffs_mount *pmp; 1816 struct vnode *vp = ap->a_vp; 1817 struct puffs_node *pn; 1818 struct puffs_vnreq_read *read_argp = NULL; 1819 struct puffs_vnreq_write *write_argp = NULL; 1820 struct buf *bp; 1821 size_t argsize; 1822 size_t tomove, moved; 1823 int error, dowritefaf; 1824 1825 pmp = MPTOPUFFSMP(vp->v_mount); 1826 bp = ap->a_bp; 1827 error = 0; 1828 dowritefaf = 0; 1829 pn = VPTOPP(vp); 1830 1831 if (((bp->b_flags & B_READ) && !EXISTSOP(pmp, READ)) 1832 || (((bp->b_flags & B_READ) == 0) && !EXISTSOP(pmp, WRITE))) { 1833 error = EOPNOTSUPP; 1834 goto out; 1835 } 1836 1837 /* 1838 * Short-circuit optimization: don't flush buffer in between 1839 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 1840 */ 1841 if (pn->pn_stat & PNODE_NOREFS) { 1842 bp->b_resid = 0; 1843 goto out; 1844 } 1845 1846 #ifdef DIAGNOSTIC 1847 if (bp->b_bcount > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1848 panic("puffs_strategy: wildly inappropriate buf bcount %d", 1849 bp->b_bcount); 1850 #endif 1851 1852 /* 1853 * See explanation for the necessity of a FAF in puffs_fsync. 1854 * 1855 * Also, do FAF in case we're suspending. 1856 * See puffs_vfsops.c:pageflush() 1857 * 1858 * XXgoddamnX: B_WRITE is a "pseudo flag" 1859 */ 1860 if ((bp->b_flags & B_READ) == 0) { 1861 simple_lock(&vp->v_interlock); 1862 if (vp->v_flag & VXLOCK) 1863 dowritefaf = 1; 1864 if (pn->pn_stat & PNODE_SUSPEND) 1865 dowritefaf = 1; 1866 simple_unlock(&vp->v_interlock); 1867 } 1868 1869 if (bp->b_flags & B_ASYNC) 1870 dowritefaf = 1; 1871 1872 #ifdef DIAGNOSTIC 1873 if (curproc == uvm.pagedaemon_proc) 1874 KASSERT(dowritefaf); 1875 #endif 1876 1877 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 1878 1879 if ((bp->b_flags & (B_READ | B_ASYNC)) == (B_READ | B_ASYNC)) { 1880 argsize = sizeof(struct puffs_vnreq_read); 1881 read_argp = malloc(argsize + tomove, 1882 M_PUFFS, M_NOWAIT | M_ZERO); 1883 if (read_argp == NULL) { 1884 error = ENOMEM; 1885 goto out; 1886 } 1887 1888 read_argp->pvnr_ioflag = 0; 1889 read_argp->pvnr_resid = tomove; 1890 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1891 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1892 1893 puffs_vntouser_call(pmp, PUFFS_VN_READ, read_argp, 1894 argsize, tomove, VPTOPNC(vp), 1895 puffs_parkdone_asyncbioread, bp, 1896 LOCKEDVP(vp), NULL); 1897 error = 0; 1898 goto wayout; 1899 } else if (bp->b_flags & B_READ) { 1900 argsize = sizeof(struct puffs_vnreq_read); 1901 read_argp = malloc(argsize + tomove, 1902 M_PUFFS, M_WAITOK | M_ZERO); 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 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1910 read_argp, argsize, tomove, 1911 VPTOPNC(vp), LOCKEDVP(vp), NULL); 1912 1913 if (error) 1914 goto out; 1915 1916 if (read_argp->pvnr_resid > tomove) { 1917 error = EINVAL; 1918 goto out; 1919 } 1920 1921 moved = tomove - read_argp->pvnr_resid; 1922 1923 (void)memcpy(bp->b_data, read_argp->pvnr_data, moved); 1924 bp->b_resid = bp->b_bcount - moved; 1925 } else { 1926 /* 1927 * make pages read-only before we write them if we want 1928 * write caching info 1929 */ 1930 if (PUFFS_WCACHEINFO(pmp)) { 1931 struct uvm_object *uobj = &vp->v_uobj; 1932 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 1933 struct vm_page *vmp; 1934 int i; 1935 1936 for (i = 0; i < npages; i++) { 1937 vmp= uvm_pageratop((vaddr_t)bp->b_data 1938 + (i << PAGE_SHIFT)); 1939 DPRINTF(("puffs_strategy: write-protecting " 1940 "vp %p page %p, offset %" PRId64"\n", 1941 vp, vmp, vmp->offset)); 1942 simple_lock(&uobj->vmobjlock); 1943 vmp->flags |= PG_RDONLY; 1944 pmap_page_protect(vmp, VM_PROT_READ); 1945 simple_unlock(&uobj->vmobjlock); 1946 } 1947 } 1948 1949 argsize = sizeof(struct puffs_vnreq_write) + bp->b_bcount; 1950 write_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 1951 if (write_argp == NULL) { 1952 error = ENOMEM; 1953 goto out; 1954 } 1955 1956 write_argp->pvnr_ioflag = 0; 1957 write_argp->pvnr_resid = tomove; 1958 write_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1959 puffs_credcvt(&write_argp->pvnr_cred, FSCRED); 1960 1961 (void)memcpy(&write_argp->pvnr_data, bp->b_data, tomove); 1962 1963 if (dowritefaf) { 1964 /* 1965 * assume FAF moves everything. frankly, we don't 1966 * really have a choice. 1967 */ 1968 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1969 PUFFS_VN_WRITE, write_argp, argsize, VPTOPNC(vp)); 1970 bp->b_resid = bp->b_bcount - tomove; 1971 } else { 1972 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1973 PUFFS_VN_WRITE, write_argp, argsize, 0, VPTOPNC(vp), 1974 vp, NULL); 1975 if (error) 1976 goto out; 1977 1978 moved = tomove - write_argp->pvnr_resid; 1979 if (write_argp->pvnr_resid > tomove) { 1980 error = EINVAL; 1981 goto out; 1982 } 1983 1984 bp->b_resid = bp->b_bcount - moved; 1985 if (write_argp->pvnr_resid != 0) 1986 error = EIO; 1987 } 1988 } 1989 1990 out: 1991 if (read_argp) 1992 free(read_argp, M_PUFFS); 1993 if (write_argp && !dowritefaf) 1994 free(write_argp, M_PUFFS); 1995 1996 if (error) { 1997 bp->b_error = error; 1998 bp->b_flags |= B_ERROR; 1999 } 2000 2001 if ((bp->b_flags & (B_READ | B_ASYNC)) != (B_READ | B_ASYNC)) 2002 biodone(bp); 2003 wayout: 2004 return error; 2005 } 2006 2007 int 2008 puffs_mmap(void *v) 2009 { 2010 struct vop_mmap_args /* { 2011 const struct vnodeop_desc *a_desc; 2012 struct vnode *a_vp; 2013 int a_fflags; 2014 kauth_cred_t a_cred; 2015 struct lwp *a_l; 2016 } */ *ap = v; 2017 struct puffs_mount *pmp; 2018 int error; 2019 2020 PUFFS_VNREQ(mmap); 2021 2022 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2023 2024 if (!PUFFS_DOCACHE(pmp)) 2025 return genfs_eopnotsupp(v); 2026 2027 if (EXISTSOP(pmp, MMAP)) { 2028 mmap_arg.pvnr_fflags = ap->a_fflags; 2029 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 2030 mmap_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 2031 2032 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 2033 &mmap_arg, sizeof(mmap_arg), 0, 2034 VPTOPNC(ap->a_vp), NULL, NULL); 2035 } else { 2036 error = genfs_mmap(v); 2037 } 2038 2039 return error; 2040 } 2041 2042 2043 /* 2044 * The rest don't get a free trip to userspace and back, they 2045 * have to stay within the kernel. 2046 */ 2047 2048 /* 2049 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2050 * well, maybe somehow, somewhere, some day .... 2051 */ 2052 int 2053 puffs_bmap(void *v) 2054 { 2055 struct vop_bmap_args /* { 2056 const struct vnodeop_desc *a_desc; 2057 struct vnode *a_vp; 2058 daddr_t a_bn; 2059 struct vnode **a_vpp; 2060 daddr_t *a_bnp; 2061 int *a_runp; 2062 } */ *ap = v; 2063 struct puffs_mount *pmp; 2064 2065 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2066 2067 if (ap->a_vpp) 2068 *ap->a_vpp = ap->a_vp; 2069 if (ap->a_bnp) 2070 *ap->a_bnp = ap->a_bn; 2071 if (ap->a_runp) 2072 *ap->a_runp 2073 = (PUFFS_TOMOVE(pmp->pmp_req_maxsize, pmp)>>DEV_BSHIFT) - 1; 2074 2075 return 0; 2076 } 2077 2078 /* 2079 * Handle getpages faults in puffs. We let genfs_getpages() do most 2080 * of the dirty work, but we come in this route to do accounting tasks. 2081 * If the user server has specified functions for cache notifications 2082 * about reads and/or writes, we record which type of operation we got, 2083 * for which page range, and proceed to issue a FAF notification to the 2084 * server about it. 2085 */ 2086 int 2087 puffs_getpages(void *v) 2088 { 2089 struct vop_getpages_args /* { 2090 const struct vnodeop_desc *a_desc; 2091 struct vnode *a_vp; 2092 voff_t a_offset; 2093 struct vm_page **a_m; 2094 int *a_count; 2095 int a_centeridx; 2096 vm_prot_t a_access_type; 2097 int a_advice; 2098 int a_flags; 2099 } */ *ap = v; 2100 struct puffs_mount *pmp; 2101 struct vnode *vp; 2102 struct vm_page **pgs; 2103 struct puffs_cacheinfo *pcinfo = NULL; 2104 struct puffs_cacherun *pcrun; 2105 void *parkmem = NULL; 2106 size_t runsizes; 2107 int i, npages, si, streakon; 2108 int error, locked, write; 2109 2110 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2111 npages = *ap->a_count; 2112 pgs = ap->a_m; 2113 vp = ap->a_vp; 2114 locked = (ap->a_flags & PGO_LOCKED) != 0; 2115 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2116 2117 /* ccg xnaht - gets Wuninitialized wrong */ 2118 pcrun = NULL; 2119 runsizes = 0; 2120 2121 if (write && PUFFS_WCACHEINFO(pmp)) { 2122 /* allocate worst-case memory */ 2123 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2124 pcinfo = malloc(sizeof(struct puffs_cacheinfo) + runsizes, 2125 M_PUFFS, M_ZERO | locked ? M_NOWAIT : M_WAITOK); 2126 2127 /* 2128 * can't block if we're locked and can't mess up caching 2129 * information for fs server. so come back later, please 2130 */ 2131 if (pcinfo == NULL) { 2132 error = ENOMEM; 2133 goto out; 2134 } 2135 2136 parkmem = puffs_park_alloc(locked == 0); 2137 if (parkmem == NULL) { 2138 error = ENOMEM; 2139 goto out; 2140 } 2141 2142 pcrun = pcinfo->pcache_runs; 2143 } 2144 2145 error = genfs_getpages(v); 2146 if (error) 2147 goto out; 2148 2149 if (PUFFS_WCACHEINFO(pmp) == 0) 2150 goto out; 2151 2152 /* 2153 * Let's see whose fault it was and inform the user server of 2154 * possibly read/written pages. Map pages from read faults 2155 * strictly read-only, since otherwise we might miss info on 2156 * when the page is actually write-faulted to. 2157 */ 2158 if (!locked) 2159 simple_lock(&vp->v_uobj.vmobjlock); 2160 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2161 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2162 if (streakon && write) { 2163 streakon = 0; 2164 pcrun[si].pcache_runend 2165 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2166 si++; 2167 } 2168 continue; 2169 } 2170 if (streakon == 0 && write) { 2171 streakon = 1; 2172 pcrun[si].pcache_runstart = pgs[i]->offset; 2173 } 2174 2175 if (!write) 2176 pgs[i]->flags |= PG_RDONLY; 2177 } 2178 /* was the last page part of our streak? */ 2179 if (streakon) { 2180 pcrun[si].pcache_runend 2181 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2182 si++; 2183 } 2184 if (!locked) 2185 simple_unlock(&vp->v_uobj.vmobjlock); 2186 2187 KASSERT(si <= (npages / 2) + 1); 2188 2189 /* send results to userspace */ 2190 if (write) 2191 puffs_cacheop(pmp, parkmem, pcinfo, 2192 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2193 2194 out: 2195 if (error) { 2196 if (pcinfo != NULL) 2197 free(pcinfo, M_PUFFS); 2198 if (parkmem != NULL) 2199 puffs_park_release(parkmem, 1); 2200 } 2201 2202 return error; 2203 } 2204 2205 int 2206 puffs_lock(void *v) 2207 { 2208 struct vop_lock_args /* { 2209 struct vnode *a_vp; 2210 int a_flags; 2211 }*/ *ap = v; 2212 struct vnode *vp = ap->a_vp; 2213 struct mount *mp = vp->v_mount; 2214 2215 #if 0 2216 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2217 #endif 2218 2219 /* 2220 * XXX: this avoids deadlocking when we're suspending. 2221 * e.g. some ops holding the vnode lock might be blocked for 2222 * the vfs transaction lock so we'd deadlock. 2223 * 2224 * Now once again this is skating on the thin ice of modern life, 2225 * since we are breaking the consistency guarantee provided 2226 * _to the user server_ by vnode locking. Hopefully this will 2227 * get fixed soon enough by getting rid of the dependency on 2228 * vnode locks alltogether. 2229 */ 2230 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2231 if (ap->a_flags & LK_INTERLOCK) 2232 simple_unlock(&vp->v_interlock); 2233 return 0; 2234 } 2235 2236 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2237 } 2238 2239 int 2240 puffs_unlock(void *v) 2241 { 2242 struct vop_unlock_args /* { 2243 struct vnode *a_vp; 2244 int a_flags; 2245 } */ *ap = v; 2246 struct vnode *vp = ap->a_vp; 2247 struct mount *mp = vp->v_mount; 2248 2249 #if 0 2250 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2251 #endif 2252 2253 /* XXX: see puffs_lock() */ 2254 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2255 if (ap->a_flags & LK_INTERLOCK) 2256 simple_unlock(&vp->v_interlock); 2257 return 0; 2258 } 2259 2260 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2261 } 2262 2263 int 2264 puffs_islocked(void *v) 2265 { 2266 struct vop_islocked_args *ap = v; 2267 int rv; 2268 2269 rv = lockstatus(&ap->a_vp->v_lock); 2270 return rv; 2271 } 2272 2273 int 2274 puffs_generic(void *v) 2275 { 2276 struct vop_generic_args *ap = v; 2277 2278 (void)ap; 2279 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2280 2281 return EOPNOTSUPP; 2282 } 2283 2284 2285 /* 2286 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2287 * FAF update information for the puffs node first. 2288 */ 2289 int 2290 puffs_spec_read(void *v) 2291 { 2292 struct vop_read_args /* { 2293 const struct vnodeop_desc *a_desc; 2294 struct vnode *a_vp; 2295 struct uio *a_uio; 2296 int a_ioflag; 2297 kauth_cred_t a_cred; 2298 } */ *ap = v; 2299 2300 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2301 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2302 } 2303 2304 int 2305 puffs_spec_write(void *v) 2306 { 2307 struct vop_write_args /* { 2308 const struct vnodeop_desc *a_desc; 2309 struct vnode *a_vp; 2310 struct uio *a_uio; 2311 int a_ioflag; 2312 kauth_cred_t a_cred; 2313 }*/ *ap = v; 2314 2315 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2316 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2317 } 2318 2319 int 2320 puffs_fifo_read(void *v) 2321 { 2322 struct vop_read_args /* { 2323 const struct vnodeop_desc *a_desc; 2324 struct vnode *a_vp; 2325 struct uio *a_uio; 2326 int a_ioflag; 2327 kauth_cred_t a_cred; 2328 } */ *ap = v; 2329 2330 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2331 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2332 } 2333 2334 int 2335 puffs_fifo_write(void *v) 2336 { 2337 struct vop_write_args /* { 2338 const struct vnodeop_desc *a_desc; 2339 struct vnode *a_vp; 2340 struct uio *a_uio; 2341 int a_ioflag; 2342 kauth_cred_t a_cred; 2343 }*/ *ap = v; 2344 2345 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2346 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2347 } 2348
Indexes created Tue Sep 30 20:09:53 GMT 2025