puffs_vnops.c revision 1.77
1 /* $NetBSD: puffs_vnops.c,v 1.77 2007/06/21 14:54:49 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006, 2007 Antti Kantee. All Rights Reserved. 5 * 6 * Development of this software was supported by the 7 * Google Summer of Code program and the Ulla Tuominen Foundation. 8 * The Google SoC project was mentored by Bill Studenmund. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 22 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.77 2007/06/21 14:54:49 pooka Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/fstrans.h> 37 #include <sys/malloc.h> 38 #include <sys/mount.h> 39 #include <sys/namei.h> 40 #include <sys/vnode.h> 41 #include <uvm/uvm.h> 42 43 #include <fs/puffs/puffs_msgif.h> 44 #include <fs/puffs/puffs_sys.h> 45 46 #include <miscfs/fifofs/fifo.h> 47 #include <miscfs/genfs/genfs.h> 48 #include <miscfs/specfs/specdev.h> 49 50 int puffs_lookup(void *); 51 int puffs_create(void *); 52 int puffs_access(void *); 53 int puffs_mknod(void *); 54 int puffs_open(void *); 55 int puffs_close(void *); 56 int puffs_getattr(void *); 57 int puffs_setattr(void *); 58 int puffs_reclaim(void *); 59 int puffs_readdir(void *); 60 int puffs_poll(void *); 61 int puffs_fsync(void *); 62 int puffs_seek(void *); 63 int puffs_remove(void *); 64 int puffs_mkdir(void *); 65 int puffs_rmdir(void *); 66 int puffs_link(void *); 67 int puffs_readlink(void *); 68 int puffs_symlink(void *); 69 int puffs_rename(void *); 70 int puffs_read(void *); 71 int puffs_write(void *); 72 int puffs_fcntl(void *); 73 int puffs_ioctl(void *); 74 int puffs_inactive(void *); 75 int puffs_print(void *); 76 int puffs_pathconf(void *); 77 int puffs_advlock(void *); 78 int puffs_strategy(void *); 79 int puffs_bmap(void *); 80 int puffs_mmap(void *); 81 int puffs_getpages(void *); 82 83 int puffs_spec_read(void *); 84 int puffs_spec_write(void *); 85 int puffs_fifo_read(void *); 86 int puffs_fifo_write(void *); 87 88 int puffs_checkop(void *); 89 90 91 /* VOP_LEASE() not included */ 92 93 int puffs_generic(void *); 94 95 #if 0 96 #define puffs_lock genfs_lock 97 #define puffs_unlock genfs_unlock 98 #define puffs_islocked genfs_islocked 99 #else 100 int puffs_lock(void *); 101 int puffs_unlock(void *); 102 int puffs_islocked(void *); 103 #endif 104 105 int (**puffs_vnodeop_p)(void *); 106 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 107 { &vop_default_desc, vn_default_error }, 108 { &vop_lookup_desc, puffs_lookup }, /* REAL lookup */ 109 { &vop_create_desc, puffs_checkop }, /* create */ 110 { &vop_mknod_desc, puffs_checkop }, /* mknod */ 111 { &vop_open_desc, puffs_open }, /* REAL open */ 112 { &vop_close_desc, puffs_checkop }, /* close */ 113 { &vop_access_desc, puffs_access }, /* REAL access */ 114 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 115 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 116 { &vop_read_desc, puffs_checkop }, /* read */ 117 { &vop_write_desc, puffs_checkop }, /* write */ 118 { &vop_fcntl_desc, puffs_checkop }, /* fcntl */ 119 { &vop_ioctl_desc, puffs_checkop }, /* ioctl */ 120 { &vop_fsync_desc, puffs_fsync }, /* REAL fsync */ 121 { &vop_seek_desc, puffs_checkop }, /* seek */ 122 { &vop_remove_desc, puffs_checkop }, /* remove */ 123 { &vop_link_desc, puffs_checkop }, /* link */ 124 { &vop_rename_desc, puffs_checkop }, /* rename */ 125 { &vop_mkdir_desc, puffs_checkop }, /* mkdir */ 126 { &vop_rmdir_desc, puffs_checkop }, /* rmdir */ 127 { &vop_symlink_desc, puffs_checkop }, /* symlink */ 128 { &vop_readdir_desc, puffs_checkop }, /* readdir */ 129 { &vop_readlink_desc, puffs_checkop }, /* readlink */ 130 { &vop_getpages_desc, puffs_checkop }, /* getpages */ 131 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 132 { &vop_pathconf_desc, puffs_checkop }, /* pathconf */ 133 { &vop_advlock_desc, puffs_checkop }, /* advlock */ 134 { &vop_strategy_desc, puffs_strategy }, /* REAL strategy */ 135 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 136 { &vop_abortop_desc, genfs_abortop }, /* REAL abortop */ 137 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 138 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 139 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 140 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 141 { &vop_bmap_desc, puffs_bmap }, /* REAL bmap */ 142 { &vop_print_desc, puffs_print }, /* REAL print */ 143 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 144 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 145 { &vop_mmap_desc, puffs_mmap }, /* REAL mmap */ 146 { &vop_poll_desc, puffs_poll }, /* REAL poll */ 147 148 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 149 { NULL, NULL } 150 }; 151 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 152 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 153 154 155 int (**puffs_specop_p)(void *); 156 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 157 { &vop_default_desc, vn_default_error }, 158 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 159 { &vop_create_desc, spec_create }, /* genfs_badop */ 160 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 161 { &vop_open_desc, spec_open }, /* spec_open */ 162 { &vop_close_desc, spec_close }, /* spec_close */ 163 { &vop_access_desc, puffs_checkop }, /* access */ 164 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 165 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 166 { &vop_read_desc, puffs_spec_read }, /* update, read */ 167 { &vop_write_desc, puffs_spec_write }, /* update, write */ 168 { &vop_lease_desc, spec_lease_check }, /* genfs_nullop */ 169 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 170 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 171 { &vop_poll_desc, spec_poll }, /* spec_poll */ 172 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 173 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 174 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 175 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 176 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 177 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 178 { &vop_link_desc, spec_link }, /* genfs_badop */ 179 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 180 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 181 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 182 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 183 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 184 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 185 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 186 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 187 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 188 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 189 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 190 { &vop_bmap_desc, spec_bmap }, /* dummy */ 191 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 192 { &vop_print_desc, puffs_print }, /* REAL print */ 193 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 194 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 195 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 196 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 197 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 198 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 199 #if 0 200 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 201 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 202 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 203 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 204 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 205 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 206 #endif 207 { NULL, NULL } 208 }; 209 const struct vnodeopv_desc puffs_specop_opv_desc = 210 { &puffs_specop_p, puffs_specop_entries }; 211 212 213 int (**puffs_fifoop_p)(void *); 214 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 215 { &vop_default_desc, vn_default_error }, 216 { &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */ 217 { &vop_create_desc, fifo_create }, /* genfs_badop */ 218 { &vop_mknod_desc, fifo_mknod }, /* genfs_badop */ 219 { &vop_open_desc, fifo_open }, /* open */ 220 { &vop_close_desc, fifo_close }, /* close */ 221 { &vop_access_desc, puffs_checkop }, /* access */ 222 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 223 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 224 { &vop_read_desc, puffs_fifo_read }, /* read, update */ 225 { &vop_write_desc, puffs_fifo_write }, /* write, update */ 226 { &vop_lease_desc, fifo_lease_check }, /* genfs_nullop */ 227 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 228 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 229 { &vop_poll_desc, fifo_poll }, /* poll */ 230 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 231 { &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */ 232 { &vop_mmap_desc, fifo_mmap }, /* genfs_badop */ 233 { &vop_fsync_desc, fifo_fsync }, /* genfs_nullop*/ 234 { &vop_seek_desc, fifo_seek }, /* genfs_badop */ 235 { &vop_remove_desc, fifo_remove }, /* genfs_badop */ 236 { &vop_link_desc, fifo_link }, /* genfs_badop */ 237 { &vop_rename_desc, fifo_rename }, /* genfs_badop */ 238 { &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */ 239 { &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */ 240 { &vop_symlink_desc, fifo_symlink }, /* genfs_badop */ 241 { &vop_readdir_desc, fifo_readdir }, /* genfs_badop */ 242 { &vop_readlink_desc, fifo_readlink }, /* genfs_badop */ 243 { &vop_abortop_desc, fifo_abortop }, /* genfs_badop */ 244 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 245 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 246 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 247 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 248 { &vop_bmap_desc, fifo_bmap }, /* dummy */ 249 { &vop_strategy_desc, fifo_strategy }, /* genfs_badop */ 250 { &vop_print_desc, puffs_print }, /* REAL print */ 251 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 252 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 253 { &vop_advlock_desc, fifo_advlock }, /* genfs_einval */ 254 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 255 { &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/ 256 #if 0 257 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 258 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 259 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 260 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 261 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 262 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 263 #endif 264 { NULL, NULL } 265 }; 266 const struct vnodeopv_desc puffs_fifoop_opv_desc = 267 { &puffs_fifoop_p, puffs_fifoop_entries }; 268 269 270 /* "real" vnode operations */ 271 int (**puffs_msgop_p)(void *); 272 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 273 { &vop_default_desc, vn_default_error }, 274 { &vop_create_desc, puffs_create }, /* create */ 275 { &vop_mknod_desc, puffs_mknod }, /* mknod */ 276 { &vop_open_desc, puffs_open }, /* open */ 277 { &vop_close_desc, puffs_close }, /* close */ 278 { &vop_access_desc, puffs_access }, /* access */ 279 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 280 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 281 { &vop_read_desc, puffs_read }, /* read */ 282 { &vop_write_desc, puffs_write }, /* write */ 283 { &vop_fcntl_desc, puffs_fcntl }, /* fcntl */ 284 { &vop_ioctl_desc, puffs_ioctl }, /* ioctl */ 285 { &vop_seek_desc, puffs_seek }, /* seek */ 286 { &vop_remove_desc, puffs_remove }, /* remove */ 287 { &vop_link_desc, puffs_link }, /* link */ 288 { &vop_rename_desc, puffs_rename }, /* rename */ 289 { &vop_mkdir_desc, puffs_mkdir }, /* mkdir */ 290 { &vop_rmdir_desc, puffs_rmdir }, /* rmdir */ 291 { &vop_symlink_desc, puffs_symlink }, /* symlink */ 292 { &vop_readdir_desc, puffs_readdir }, /* readdir */ 293 { &vop_readlink_desc, puffs_readlink }, /* readlink */ 294 { &vop_print_desc, puffs_print }, /* print */ 295 { &vop_islocked_desc, puffs_islocked }, /* islocked */ 296 { &vop_pathconf_desc, puffs_pathconf }, /* pathconf */ 297 { &vop_advlock_desc, puffs_advlock }, /* advlock */ 298 { &vop_getpages_desc, puffs_getpages }, /* getpages */ 299 { NULL, NULL } 300 }; 301 const struct vnodeopv_desc puffs_msgop_opv_desc = 302 { &puffs_msgop_p, puffs_msgop_entries }; 303 304 305 #define LOCKEDVP(a) (VOP_ISLOCKED(a) ? (a) : NULL) 306 307 308 /* 309 * This is a generic vnode operation handler. It checks if the necessary 310 * operations for the called vnode operation are implemented by userspace 311 * and either returns a dummy return value or proceeds to call the real 312 * vnode operation from puffs_msgop_v. 313 * 314 * XXX: this should described elsewhere and autogenerated, the complexity 315 * of the vnode operations vectors and their interrelationships is also 316 * getting a bit out of hand. Another problem is that we need this same 317 * information in the fs server code, so keeping the two in sync manually 318 * is not a viable (long term) plan. 319 */ 320 321 /* not supported, handle locking protocol */ 322 #define CHECKOP_NOTSUPP(op) \ 323 case VOP_##op##_DESCOFFSET: \ 324 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 325 return genfs_eopnotsupp(v); \ 326 break 327 328 /* always succeed, no locking */ 329 #define CHECKOP_SUCCESS(op) \ 330 case VOP_##op##_DESCOFFSET: \ 331 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 332 return 0; \ 333 break 334 335 int 336 puffs_checkop(void *v) 337 { 338 struct vop_generic_args /* { 339 struct vnodeop_desc *a_desc; 340 spooky mystery contents; 341 } */ *ap = v; 342 struct vnodeop_desc *desc = ap->a_desc; 343 struct puffs_mount *pmp; 344 struct vnode *vp; 345 int offset, rv; 346 347 offset = ap->a_desc->vdesc_vp_offsets[0]; 348 #ifdef DIAGNOSTIC 349 if (offset == VDESC_NO_OFFSET) 350 panic("puffs_checkop: no vnode, why did you call me?"); 351 #endif 352 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 353 pmp = MPTOPUFFSMP(vp->v_mount); 354 355 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 356 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 357 358 if (!ALLOPS(pmp)) { 359 switch (desc->vdesc_offset) { 360 CHECKOP_NOTSUPP(CREATE); 361 CHECKOP_NOTSUPP(MKNOD); 362 CHECKOP_NOTSUPP(GETATTR); 363 CHECKOP_NOTSUPP(SETATTR); 364 CHECKOP_NOTSUPP(READ); 365 CHECKOP_NOTSUPP(WRITE); 366 CHECKOP_NOTSUPP(FCNTL); 367 CHECKOP_NOTSUPP(IOCTL); 368 CHECKOP_NOTSUPP(REMOVE); 369 CHECKOP_NOTSUPP(LINK); 370 CHECKOP_NOTSUPP(RENAME); 371 CHECKOP_NOTSUPP(MKDIR); 372 CHECKOP_NOTSUPP(RMDIR); 373 CHECKOP_NOTSUPP(SYMLINK); 374 CHECKOP_NOTSUPP(READDIR); 375 CHECKOP_NOTSUPP(READLINK); 376 CHECKOP_NOTSUPP(PRINT); 377 CHECKOP_NOTSUPP(PATHCONF); 378 CHECKOP_NOTSUPP(ADVLOCK); 379 380 CHECKOP_SUCCESS(ACCESS); 381 CHECKOP_SUCCESS(CLOSE); 382 CHECKOP_SUCCESS(SEEK); 383 384 case VOP_GETPAGES_DESCOFFSET: 385 if (!EXISTSOP(pmp, READ)) 386 return genfs_eopnotsupp(v); 387 break; 388 389 default: 390 panic("puffs_checkop: unhandled vnop %d", 391 desc->vdesc_offset); 392 } 393 } 394 395 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 396 397 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 398 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 399 400 return rv; 401 } 402 403 404 int 405 puffs_lookup(void *v) 406 { 407 struct vop_lookup_args /* { 408 const struct vnodeop_desc *a_desc; 409 struct vnode *a_dvp; 410 struct vnode **a_vpp; 411 struct componentname *a_cnp; 412 } */ *ap = v; 413 struct puffs_mount *pmp; 414 struct componentname *cnp; 415 struct vnode *vp, *dvp; 416 struct puffs_node *dpn; 417 int isdot; 418 int error; 419 420 PUFFS_VNREQ(lookup); 421 422 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 423 cnp = ap->a_cnp; 424 dvp = ap->a_dvp; 425 *ap->a_vpp = NULL; 426 427 /* first things first: check access */ 428 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 429 if (error) 430 return error; 431 432 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 433 434 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %lx\n", 435 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 436 437 /* 438 * Check if someone fed it into the cache 439 */ 440 if (PUFFS_DOCACHE(pmp)) { 441 error = cache_lookup(dvp, ap->a_vpp, cnp); 442 443 if (error >= 0) 444 return error; 445 } 446 447 if (isdot) { 448 vp = ap->a_dvp; 449 vref(vp); 450 *ap->a_vpp = vp; 451 return 0; 452 } 453 454 puffs_makecn(&lookup_arg.pvnr_cn, cnp); 455 456 if (cnp->cn_flags & ISDOTDOT) 457 VOP_UNLOCK(dvp, 0); 458 459 error = puffs_vntouser(pmp, PUFFS_VN_LOOKUP, 460 &lookup_arg, sizeof(lookup_arg), 0, dvp, NULL); 461 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 462 463 /* 464 * In case of error, there is no new vnode to play with, so be 465 * happy with the NULL value given to vpp in the beginning. 466 * Also, check if this really was an error or the target was not 467 * present. Either treat it as a non-error for CREATE/RENAME or 468 * enter the component into the negative name cache (if desired). 469 */ 470 if (error) { 471 if (error == ENOENT) { 472 if ((cnp->cn_flags & ISLASTCN) 473 && (cnp->cn_nameiop == CREATE 474 || cnp->cn_nameiop == RENAME)) { 475 cnp->cn_flags |= SAVENAME; 476 error = EJUSTRETURN; 477 } else { 478 if ((cnp->cn_flags & MAKEENTRY) 479 && PUFFS_DOCACHE(pmp)) 480 cache_enter(dvp, NULL, cnp); 481 } 482 } else if (error < 0) { 483 error = EINVAL; 484 } 485 goto errout; 486 } 487 488 /* 489 * Check that we don't get our parent node back, that would cause 490 * a pretty obvious deadlock. 491 */ 492 dpn = dvp->v_data; 493 if (lookup_arg.pvnr_newnode == dpn->pn_cookie) { 494 error = EINVAL; 495 goto errout; 496 } 497 498 /* XXX: race here */ 499 /* XXX2: this check for node existence twice */ 500 error = puffs_pnode2vnode(pmp, lookup_arg.pvnr_newnode, 1, &vp); 501 if (error) { 502 error = puffs_getvnode(dvp->v_mount, 503 lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype, 504 lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp); 505 if (error) { 506 goto errout; 507 } 508 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 509 } 510 *ap->a_vpp = vp; 511 512 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_DOCACHE(pmp)) 513 cache_enter(dvp, vp, cnp); 514 515 errout: 516 if (cnp->cn_flags & ISDOTDOT) 517 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 518 519 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 520 return error; 521 } 522 523 int 524 puffs_create(void *v) 525 { 526 struct vop_create_args /* { 527 const struct vnodeop_desc *a_desc; 528 struct vnode *a_dvp; 529 struct vnode **a_vpp; 530 struct componentname *a_cnp; 531 struct vattr *a_vap; 532 } */ *ap = v; 533 int error; 534 535 PUFFS_VNREQ(create); 536 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 537 ap->a_dvp, ap->a_cnp->cn_nameptr)); 538 539 puffs_makecn(&create_arg.pvnr_cn, ap->a_cnp); 540 create_arg.pvnr_va = *ap->a_vap; 541 542 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_CREATE, 543 &create_arg, sizeof(create_arg), 0, 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, ap->a_dvp, NULL); 579 if (error) 580 goto out; 581 582 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 583 mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 584 ap->a_vap->va_rdev); 585 586 out: 587 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 588 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 589 vput(ap->a_dvp); 590 return error; 591 } 592 593 int 594 puffs_open(void *v) 595 { 596 struct vop_open_args /* { 597 const struct vnodeop_desc *a_desc; 598 struct vnode *a_vp; 599 int a_mode; 600 kauth_cred_t a_cred; 601 struct lwp *a_l; 602 } */ *ap = v; 603 struct vnode *vp = ap->a_vp; 604 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 605 int mode = ap->a_mode; 606 int rv; 607 608 PUFFS_VNREQ(open); 609 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 610 611 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) { 612 rv = EROFS; 613 goto out; 614 } 615 616 if (!EXISTSOP(pmp, OPEN)) { 617 rv = 0; 618 goto out; 619 } 620 621 open_arg.pvnr_mode = mode; 622 puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred); 623 open_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 624 625 rv = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_OPEN, 626 &open_arg, sizeof(open_arg), 0, vp, NULL); 627 628 out: 629 DPRINTF(("puffs_open: returning %d\n", rv)); 630 return rv; 631 } 632 633 int 634 puffs_close(void *v) 635 { 636 struct vop_close_args /* { 637 const struct vnodeop_desc *a_desc; 638 struct vnode *a_vp; 639 int a_fflag; 640 kauth_cred_t a_cred; 641 struct lwp *a_l; 642 } */ *ap = v; 643 struct puffs_vnreq_close *close_argp; 644 645 close_argp = malloc(sizeof(struct puffs_vnreq_close), 646 M_PUFFS, M_WAITOK | M_ZERO); 647 close_argp->pvnr_fflag = ap->a_fflag; 648 puffs_credcvt(&close_argp->pvnr_cred, ap->a_cred); 649 close_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 650 651 puffs_vntouser_faf(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 652 close_argp, sizeof(struct puffs_vnreq_close), ap->a_vp); 653 654 return 0; 655 } 656 657 int 658 puffs_access(void *v) 659 { 660 struct vop_access_args /* { 661 const struct vnodeop_desc *a_desc; 662 struct vnode *a_vp; 663 int a_mode; 664 kauth_cred_t a_cred; 665 struct lwp *a_l; 666 } */ *ap = v; 667 struct vnode *vp = ap->a_vp; 668 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 669 int mode = ap->a_mode; 670 671 PUFFS_VNREQ(access); 672 673 if (vp->v_type == VREG && mode & VWRITE && !EXISTSOP(pmp, WRITE)) 674 return EROFS; 675 676 if (!EXISTSOP(pmp, ACCESS)) 677 return 0; 678 679 access_arg.pvnr_mode = ap->a_mode; 680 access_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 681 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 682 683 return puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_ACCESS, 684 &access_arg, sizeof(access_arg), 0, vp, NULL); 685 } 686 687 int 688 puffs_getattr(void *v) 689 { 690 struct vop_getattr_args /* { 691 const struct vnodeop_desc *a_desc; 692 struct vnode *a_vp; 693 struct vattr *a_vap; 694 kauth_cred_t a_cred; 695 struct lwp *a_l; 696 } */ *ap = v; 697 struct mount *mp; 698 struct vnode *vp; 699 struct vattr *vap, *rvap; 700 struct puffs_node *pn; 701 int error; 702 703 PUFFS_VNREQ(getattr); 704 705 vp = ap->a_vp; 706 mp = vp->v_mount; 707 vap = ap->a_vap; 708 709 vattr_null(&getattr_arg.pvnr_va); 710 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 711 getattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 712 713 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_GETATTR, 714 &getattr_arg, sizeof(getattr_arg), 0, vp, NULL); 715 if (error) 716 return error; 717 718 rvap = &getattr_arg.pvnr_va; 719 /* 720 * Don't listen to the file server regarding special device 721 * size info, the file server doesn't know anything about them. 722 */ 723 if (vp->v_type == VBLK || vp->v_type == VCHR) 724 rvap->va_size = vp->v_size; 725 726 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 727 if (vp->v_type == VBLK) 728 rvap->va_blocksize = BLKDEV_IOSIZE; 729 else if (vp->v_type == VCHR) 730 rvap->va_blocksize = MAXBSIZE; 731 732 (void) memcpy(vap, rvap, sizeof(struct vattr)); 733 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 734 735 pn = VPTOPP(vp); 736 if (pn->pn_stat & PNODE_METACACHE_ATIME) 737 vap->va_atime = pn->pn_mc_atime; 738 if (pn->pn_stat & PNODE_METACACHE_CTIME) 739 vap->va_ctime = pn->pn_mc_ctime; 740 if (pn->pn_stat & PNODE_METACACHE_MTIME) 741 vap->va_mtime = pn->pn_mc_mtime; 742 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 743 vap->va_size = pn->pn_mc_size; 744 } else { 745 if (rvap->va_size != VNOVAL 746 && vp->v_type != VBLK && vp->v_type != VCHR) 747 uvm_vnp_setsize(vp, rvap->va_size); 748 } 749 750 return 0; 751 } 752 753 int 754 puffs_setattr(void *v) 755 { 756 struct vop_getattr_args /* { 757 const struct vnodeop_desc *a_desc; 758 struct vnode *a_vp; 759 struct vattr *a_vap; 760 kauth_cred_t a_cred; 761 struct lwp *a_l; 762 } */ *ap = v; 763 int error; 764 struct vattr *vap = ap->a_vap; 765 struct puffs_node *pn = ap->a_vp->v_data; 766 767 PUFFS_VNREQ(setattr); 768 769 /* 770 * Flush metacache first. If we are called with some explicit 771 * parameters, treat them as information overriding metacache 772 * information. 773 */ 774 if (pn->pn_stat & PNODE_METACACHE_MASK) { 775 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 776 && vap->va_atime.tv_sec == VNOVAL) 777 vap->va_atime = pn->pn_mc_atime; 778 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 779 && vap->va_ctime.tv_sec == VNOVAL) 780 vap->va_ctime = pn->pn_mc_ctime; 781 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 782 && vap->va_mtime.tv_sec == VNOVAL) 783 vap->va_mtime = pn->pn_mc_mtime; 784 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 785 && vap->va_size == VNOVAL) 786 vap->va_size = pn->pn_mc_size; 787 788 pn->pn_stat &= ~PNODE_METACACHE_MASK; 789 } 790 791 (void)memcpy(&setattr_arg.pvnr_va, vap, sizeof(struct vattr)); 792 puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred); 793 setattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 794 795 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR, 796 &setattr_arg, sizeof(setattr_arg), 0, ap->a_vp, NULL); 797 if (error) 798 return error; 799 800 if (vap->va_size != VNOVAL) 801 uvm_vnp_setsize(ap->a_vp, vap->va_size); 802 803 return 0; 804 } 805 806 int 807 puffs_inactive(void *v) 808 { 809 struct vop_inactive_args /* { 810 const struct vnodeop_desc *a_desc; 811 struct vnode *a_vp; 812 struct lwp *a_l; 813 } */ *ap = v; 814 struct puffs_mount *pmp; 815 struct puffs_node *pnode; 816 int rv, vnrefs, call; 817 818 PUFFS_VNREQ(inactive); 819 820 /* 821 * XXX: think about this after we really start unlocking 822 * when going to userspace 823 */ 824 pnode = ap->a_vp->v_data; 825 826 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 827 828 inactive_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 829 830 if (EXISTSOP(pmp, INACTIVE)) 831 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 832 if ((pnode->pn_stat & PNODE_DOINACT) || ALLOPS(pmp)) 833 call = 1; 834 else 835 call = 0; 836 else 837 call = 1; 838 else 839 call = 0; 840 841 if (call) 842 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 843 &inactive_arg, sizeof(inactive_arg), 0, ap->a_vp, NULL); 844 else 845 rv = 1; /* see below */ 846 pnode->pn_stat &= ~PNODE_DOINACT; 847 848 /* can't trust userspace return value? simulate safe answer */ 849 if (rv) 850 vnrefs = 1; 851 else 852 vnrefs = inactive_arg.pvnr_backendrefs; 853 854 VOP_UNLOCK(ap->a_vp, 0); 855 856 /* 857 * user server thinks it's gone? then don't be afraid care, 858 * node's life was already all it would ever be 859 */ 860 if (vnrefs == 0 || (pnode->pn_stat & PNODE_NOREFS)) { 861 pnode->pn_stat |= PNODE_DYING; 862 vrecycle(ap->a_vp, NULL, ap->a_l); 863 } 864 865 return 0; 866 } 867 868 /* 869 * always FAF, we don't really care if the server wants to fail to 870 * reclaim the node or not 871 */ 872 int 873 puffs_reclaim(void *v) 874 { 875 struct vop_reclaim_args /* { 876 const struct vnodeop_desc *a_desc; 877 struct vnode *a_vp; 878 struct lwp *a_l; 879 } */ *ap = v; 880 struct puffs_mount *pmp; 881 struct puffs_vnreq_reclaim *reclaim_argp; 882 883 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 884 885 /* 886 * first things first: check if someone is trying to reclaim the 887 * root vnode. do not allow that to travel to userspace. 888 * Note that we don't need to take the lock similarly to 889 * puffs_root(), since there is only one of us. 890 */ 891 if (ap->a_vp->v_flag & VROOT) { 892 mutex_enter(&pmp->pmp_lock); 893 KASSERT(pmp->pmp_root != NULL); 894 pmp->pmp_root = NULL; 895 mutex_exit(&pmp->pmp_lock); 896 goto out; 897 } 898 899 if (!EXISTSOP(pmp, RECLAIM)) 900 goto out; 901 902 reclaim_argp = malloc(sizeof(struct puffs_vnreq_reclaim), 903 M_PUFFS, M_WAITOK | M_ZERO); 904 reclaim_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 905 906 puffs_vntouser_faf(pmp, PUFFS_VN_RECLAIM, 907 reclaim_argp, sizeof(struct puffs_vnreq_reclaim), ap->a_vp); 908 909 out: 910 if (PUFFS_DOCACHE(pmp)) 911 cache_purge(ap->a_vp); 912 puffs_putvnode(ap->a_vp); 913 914 return 0; 915 } 916 917 #define CSIZE sizeof(**ap->a_cookies) 918 int 919 puffs_readdir(void *v) 920 { 921 struct vop_readdir_args /* { 922 const struct vnodeop_desc *a_desc; 923 struct vnode *a_vp; 924 struct uio *a_uio; 925 kauth_cred_t a_cred; 926 int *a_eofflag; 927 off_t **a_cookies; 928 int *a_ncookies; 929 } */ *ap = v; 930 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 931 struct puffs_vnreq_readdir *readdir_argp; 932 size_t argsize, tomove, cookiemem, cookiesmax; 933 struct uio *uio = ap->a_uio; 934 size_t howmuch; 935 int error; 936 937 if (ap->a_cookies) { 938 KASSERT(ap->a_ncookies != NULL); 939 if (pmp->pmp_args.pa_fhsize == 0) 940 return EOPNOTSUPP; 941 cookiesmax = uio->uio_resid/_DIRENT_MINSIZE((struct dirent *)0); 942 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 943 } else { 944 cookiesmax = 0; 945 cookiemem = 0; 946 } 947 948 argsize = sizeof(struct puffs_vnreq_readdir); 949 tomove = uio->uio_resid + cookiemem; 950 readdir_argp = malloc(argsize + tomove, M_PUFFS, M_ZERO | M_WAITOK); 951 952 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 953 readdir_argp->pvnr_offset = uio->uio_offset; 954 readdir_argp->pvnr_resid = uio->uio_resid; 955 readdir_argp->pvnr_ncookies = cookiesmax; 956 readdir_argp->pvnr_eofflag = 0; 957 readdir_argp->pvnr_dentoff = cookiemem; 958 959 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 960 PUFFS_VN_READDIR, readdir_argp, argsize, tomove, 961 ap->a_vp, NULL); 962 if (error) 963 goto out; 964 965 /* userspace is cheating? */ 966 if (readdir_argp->pvnr_resid > uio->uio_resid 967 || readdir_argp->pvnr_ncookies > cookiesmax) { 968 error = EINVAL; 969 goto out; 970 } 971 972 /* check eof */ 973 if (readdir_argp->pvnr_eofflag) 974 *ap->a_eofflag = 1; 975 976 /* bouncy-wouncy with the directory data */ 977 howmuch = uio->uio_resid - readdir_argp->pvnr_resid; 978 979 /* force eof if no data was returned (getcwd() needs this) */ 980 if (howmuch == 0) { 981 *ap->a_eofflag = 1; 982 goto out; 983 } 984 985 error = uiomove(readdir_argp->pvnr_data + cookiemem, howmuch, uio); 986 if (error) 987 goto out; 988 989 /* provide cookies to caller if so desired */ 990 if (ap->a_cookies) { 991 *ap->a_cookies = malloc(readdir_argp->pvnr_ncookies*CSIZE, 992 M_TEMP, M_WAITOK); 993 *ap->a_ncookies = readdir_argp->pvnr_ncookies; 994 memcpy(*ap->a_cookies, readdir_argp->pvnr_data, 995 *ap->a_ncookies*CSIZE); 996 } 997 998 /* next readdir starts here */ 999 uio->uio_offset = readdir_argp->pvnr_offset; 1000 1001 out: 1002 free(readdir_argp, M_PUFFS); 1003 return error; 1004 } 1005 #undef CSIZE 1006 1007 /* 1008 * poll works by consuming the bitmask in pn_revents. If there are 1009 * events available, poll returns immediately. If not, it issues a 1010 * poll to userspace, selrecords itself and returns with no available 1011 * events. When the file server returns, it executes puffs_parkdone_poll(), 1012 * where available events are added to the bitmask. selnotify() is 1013 * then also executed by that function causing us to enter here again 1014 * and hopefully find the missing bits (unless someone got them first, 1015 * in which case it starts all over again). 1016 */ 1017 int 1018 puffs_poll(void *v) 1019 { 1020 struct vop_poll_args /* { 1021 const struct vnodeop_desc *a_desc; 1022 struct vnode *a_vp; 1023 int a_events; 1024 struct lwp *a_l; 1025 }*/ *ap = v; 1026 struct vnode *vp = ap->a_vp; 1027 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1028 struct puffs_vnreq_poll *poll_argp; 1029 struct puffs_node *pn = vp->v_data; 1030 int events; 1031 1032 if (EXISTSOP(pmp, POLL)) { 1033 mutex_enter(&pn->pn_mtx); 1034 events = pn->pn_revents & ap->a_events; 1035 if (events & ap->a_events) { 1036 pn->pn_revents &= ~ap->a_events; 1037 mutex_exit(&pn->pn_mtx); 1038 1039 return events; 1040 } else { 1041 puffs_referencenode(pn); 1042 mutex_exit(&pn->pn_mtx); 1043 1044 /* freed in puffs_parkdone_poll */ 1045 poll_argp = malloc(sizeof(struct puffs_vnreq_poll), 1046 M_PUFFS, M_ZERO | M_WAITOK); 1047 1048 poll_argp->pvnr_events = ap->a_events; 1049 poll_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 1050 1051 selrecord(ap->a_l, &pn->pn_sel); 1052 puffs_vntouser_call(pmp, PUFFS_VN_POLL, 1053 poll_argp, sizeof(struct puffs_vnreq_poll), 0, 1054 puffs_parkdone_poll, pn, 1055 vp, NULL); 1056 1057 return 0; 1058 } 1059 } else { 1060 return genfs_poll(v); 1061 } 1062 } 1063 1064 int 1065 puffs_fsync(void *v) 1066 { 1067 struct vop_fsync_args /* { 1068 const struct vnodeop_desc *a_desc; 1069 struct vnode *a_vp; 1070 kauth_cred_t a_cred; 1071 int a_flags; 1072 off_t a_offlo; 1073 off_t a_offhi; 1074 struct lwp *a_l; 1075 } */ *ap = v; 1076 struct vattr va; 1077 struct puffs_mount *pmp; 1078 struct puffs_vnreq_fsync *fsync_argp; 1079 struct vnode *vp; 1080 struct puffs_node *pn; 1081 int pflags, error, dofaf; 1082 1083 PUFFS_VNREQ(fsync); 1084 1085 vp = ap->a_vp; 1086 pn = VPTOPP(vp); 1087 pmp = MPTOPUFFSMP(vp->v_mount); 1088 1089 /* flush out information from our metacache, see vop_setattr */ 1090 if (pn->pn_stat & PNODE_METACACHE_MASK 1091 && (pn->pn_stat & PNODE_DYING) == 0) { 1092 vattr_null(&va); 1093 error = VOP_SETATTR(vp, &va, FSCRED, NULL); 1094 if (error) 1095 return error; 1096 } 1097 1098 /* 1099 * flush pages to avoid being overly dirty 1100 */ 1101 pflags = PGO_CLEANIT; 1102 if (ap->a_flags & FSYNC_WAIT) 1103 pflags |= PGO_SYNCIO; 1104 simple_lock(&vp->v_interlock); 1105 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1106 round_page(ap->a_offhi), pflags); 1107 if (error) 1108 return error; 1109 1110 /* 1111 * HELLO! We exit already here if the user server does not 1112 * support fsync OR if we should call fsync for a node which 1113 * has references neither in the kernel or the fs server. 1114 * Otherwise we continue to issue fsync() forward. 1115 */ 1116 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1117 return 0; 1118 1119 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1120 /* 1121 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1122 * only FAFs for those. Otherwise there's a danger of deadlock, 1123 * since the execution context here might be the user server 1124 * doing some operation on another fs, which in turn caused a 1125 * vnode to be reclaimed from the freelist for this fs. 1126 */ 1127 if (dofaf == 0) { 1128 simple_lock(&vp->v_interlock); 1129 if (vp->v_flag & VXLOCK) 1130 dofaf = 1; 1131 simple_unlock(&vp->v_interlock); 1132 } 1133 1134 if (dofaf == 0) { 1135 fsync_argp = &fsync_arg; 1136 } else { 1137 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 1138 M_PUFFS, M_ZERO | M_NOWAIT); 1139 if (fsync_argp == NULL) 1140 return ENOMEM; 1141 } 1142 1143 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 1144 fsync_argp->pvnr_flags = ap->a_flags; 1145 fsync_argp->pvnr_offlo = ap->a_offlo; 1146 fsync_argp->pvnr_offhi = ap->a_offhi; 1147 fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 1148 1149 /* 1150 * XXX: see comment at puffs_getattr about locking 1151 * 1152 * If we are not required to wait, do a FAF operation. 1153 * Otherwise block here. 1154 */ 1155 if (dofaf == 0) { 1156 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1157 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 0, 1158 vp, NULL); 1159 } else { 1160 /* FAF is always "succesful" */ 1161 error = 0; 1162 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1163 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), vp); 1164 } 1165 1166 return error; 1167 } 1168 1169 int 1170 puffs_seek(void *v) 1171 { 1172 struct vop_seek_args /* { 1173 const struct vnodeop_desc *a_desc; 1174 struct vnode *a_vp; 1175 off_t a_oldoff; 1176 off_t a_newoff; 1177 kauth_cred_t a_cred; 1178 } */ *ap = v; 1179 1180 PUFFS_VNREQ(seek); 1181 1182 seek_arg.pvnr_oldoff = ap->a_oldoff; 1183 seek_arg.pvnr_newoff = ap->a_newoff; 1184 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1185 1186 /* 1187 * XXX: seems like seek is called with an unlocked vp, but 1188 * it can't hurt to play safe 1189 */ 1190 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1191 &seek_arg, sizeof(seek_arg), 0, ap->a_vp, NULL); 1192 } 1193 1194 int 1195 puffs_remove(void *v) 1196 { 1197 struct vop_remove_args /* { 1198 const struct vnodeop_desc *a_desc; 1199 struct vnode *a_dvp; 1200 struct vnode *a_vp; 1201 struct componentname *a_cnp; 1202 } */ *ap = v; 1203 int error; 1204 1205 PUFFS_VNREQ(remove); 1206 1207 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1208 puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp); 1209 1210 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE, 1211 &remove_arg, sizeof(remove_arg), 0, ap->a_dvp, ap->a_vp); 1212 1213 vput(ap->a_vp); 1214 if (ap->a_dvp == ap->a_vp) 1215 vrele(ap->a_dvp); 1216 else 1217 vput(ap->a_dvp); 1218 1219 return error; 1220 } 1221 1222 int 1223 puffs_mkdir(void *v) 1224 { 1225 struct vop_mkdir_args /* { 1226 const struct vnodeop_desc *a_desc; 1227 struct vnode *a_dvp; 1228 struct vnode **a_vpp; 1229 struct componentname *a_cnp; 1230 struct vattr *a_vap; 1231 } */ *ap = v; 1232 int error; 1233 1234 PUFFS_VNREQ(mkdir); 1235 1236 puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp); 1237 mkdir_arg.pvnr_va = *ap->a_vap; 1238 1239 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR, 1240 &mkdir_arg, sizeof(mkdir_arg), 0, ap->a_dvp, NULL); 1241 if (error) 1242 goto out; 1243 1244 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1245 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1246 1247 out: 1248 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1249 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1250 vput(ap->a_dvp); 1251 return error; 1252 } 1253 1254 int 1255 puffs_rmdir(void *v) 1256 { 1257 struct vop_rmdir_args /* { 1258 const struct vnodeop_desc *a_desc; 1259 struct vnode *a_dvp; 1260 struct vnode *a_vp; 1261 struct componentname *a_cnp; 1262 } */ *ap = v; 1263 int error; 1264 1265 PUFFS_VNREQ(rmdir); 1266 1267 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1268 puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp); 1269 1270 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR, 1271 &rmdir_arg, sizeof(rmdir_arg), 0, ap->a_dvp, ap->a_vp); 1272 1273 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1274 1275 vput(ap->a_dvp); 1276 vput(ap->a_vp); 1277 1278 return error; 1279 } 1280 1281 int 1282 puffs_link(void *v) 1283 { 1284 struct vop_link_args /* { 1285 const struct vnodeop_desc *a_desc; 1286 struct vnode *a_dvp; 1287 struct vnode *a_vp; 1288 struct componentname *a_cnp; 1289 }*/ *ap = v; 1290 int error; 1291 1292 PUFFS_VNREQ(link); 1293 1294 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1295 puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp); 1296 1297 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK, 1298 &link_arg, sizeof(link_arg), 0, ap->a_dvp, ap->a_vp); 1299 1300 /* 1301 * XXX: stay in touch with the cache. I don't like this, but 1302 * don't have a better solution either. See also puffs_rename(). 1303 */ 1304 if (error == 0) 1305 puffs_updatenode(ap->a_vp, PUFFS_UPDATECTIME); 1306 1307 vput(ap->a_dvp); 1308 1309 return error; 1310 } 1311 1312 int 1313 puffs_symlink(void *v) 1314 { 1315 struct vop_symlink_args /* { 1316 const struct vnodeop_desc *a_desc; 1317 struct vnode *a_dvp; 1318 struct vnode **a_vpp; 1319 struct componentname *a_cnp; 1320 struct vattr *a_vap; 1321 char *a_target; 1322 }*/ *ap = v; 1323 int error; 1324 1325 PUFFS_VNREQ(symlink); /* XXX: large structure */ 1326 1327 *ap->a_vpp = NULL; 1328 1329 puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp); 1330 symlink_arg.pvnr_va = *ap->a_vap; 1331 (void)strlcpy(symlink_arg.pvnr_link, ap->a_target, 1332 sizeof(symlink_arg.pvnr_link)); 1333 1334 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), 1335 PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg), 0, 1336 ap->a_dvp, NULL); 1337 if (error) 1338 goto out; 1339 1340 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1341 symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0); 1342 1343 out: 1344 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1345 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1346 vput(ap->a_dvp); 1347 return error; 1348 } 1349 1350 int 1351 puffs_readlink(void *v) 1352 { 1353 struct vop_readlink_args /* { 1354 const struct vnodeop_desc *a_desc; 1355 struct vnode *a_vp; 1356 struct uio *a_uio; 1357 kauth_cred_t a_cred; 1358 } */ *ap = v; 1359 size_t linklen; 1360 int error; 1361 1362 PUFFS_VNREQ(readlink); 1363 1364 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1365 linklen = sizeof(readlink_arg.pvnr_link); 1366 readlink_arg.pvnr_linklen = linklen; 1367 1368 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1369 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 0, 1370 ap->a_vp, NULL); 1371 if (error) 1372 return error; 1373 1374 /* bad bad user file server */ 1375 if (readlink_arg.pvnr_linklen > linklen) 1376 return EINVAL; 1377 1378 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1379 ap->a_uio); 1380 } 1381 1382 /* XXXXXXX: think about locking & userspace op delocking... */ 1383 int 1384 puffs_rename(void *v) 1385 { 1386 struct vop_rename_args /* { 1387 const struct vnodeop_desc *a_desc; 1388 struct vnode *a_fdvp; 1389 struct vnode *a_fvp; 1390 struct componentname *a_fcnp; 1391 struct vnode *a_tdvp; 1392 struct vnode *a_tvp; 1393 struct componentname *a_tcnp; 1394 }*/ *ap = v; 1395 int error; 1396 1397 PUFFS_VNREQ(rename); 1398 1399 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) { 1400 error = EXDEV; 1401 goto out; 1402 } 1403 1404 rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1405 rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1406 if (ap->a_tvp) 1407 rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1408 else 1409 rename_arg.pvnr_cookie_targ = NULL; 1410 puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp); 1411 puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp); 1412 1413 error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount), 1414 PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg), 0, 1415 ap->a_fdvp, NULL); /* XXX */ 1416 1417 /* 1418 * XXX: stay in touch with the cache. I don't like this, but 1419 * don't have a better solution either. See also puffs_link(). 1420 */ 1421 if (error == 0) 1422 puffs_updatenode(ap->a_fvp, PUFFS_UPDATECTIME); 1423 1424 out: 1425 if (ap->a_tvp != NULL) 1426 vput(ap->a_tvp); 1427 if (ap->a_tdvp == ap->a_tvp) 1428 vrele(ap->a_tdvp); 1429 else 1430 vput(ap->a_tdvp); 1431 1432 vrele(ap->a_fdvp); 1433 vrele(ap->a_fvp); 1434 1435 return error; 1436 } 1437 1438 int 1439 puffs_read(void *v) 1440 { 1441 struct vop_read_args /* { 1442 const struct vnodeop_desc *a_desc; 1443 struct vnode *a_vp; 1444 struct uio *a_uio; 1445 int a_ioflag; 1446 kauth_cred_t a_cred; 1447 } */ *ap = v; 1448 struct puffs_vnreq_read *read_argp; 1449 struct puffs_mount *pmp; 1450 struct vnode *vp; 1451 struct uio *uio; 1452 void *win; 1453 size_t tomove, argsize; 1454 vsize_t bytelen; 1455 int error, ubcflags; 1456 1457 uio = ap->a_uio; 1458 vp = ap->a_vp; 1459 read_argp = NULL; 1460 error = 0; 1461 pmp = MPTOPUFFSMP(vp->v_mount); 1462 1463 /* std sanity */ 1464 if (uio->uio_resid == 0) 1465 return 0; 1466 if (uio->uio_offset < 0) 1467 return EINVAL; 1468 1469 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1470 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1471 1472 ubcflags = 0; 1473 if (UBC_WANT_UNMAP(vp)) 1474 ubcflags = UBC_UNMAP; 1475 1476 while (uio->uio_resid > 0) { 1477 bytelen = MIN(uio->uio_resid, 1478 vp->v_size - uio->uio_offset); 1479 if (bytelen == 0) 1480 break; 1481 1482 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1483 &bytelen, advice, UBC_READ); 1484 error = uiomove(win, bytelen, uio); 1485 ubc_release(win, ubcflags); 1486 if (error) 1487 break; 1488 } 1489 1490 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1491 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1492 } else { 1493 /* 1494 * in case it's not a regular file or we're operating 1495 * uncached, do read in the old-fashioned style, 1496 * i.e. explicit read operations 1497 */ 1498 1499 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1500 argsize = sizeof(struct puffs_vnreq_read); 1501 read_argp = malloc(argsize + tomove, 1502 M_PUFFS, M_WAITOK | M_ZERO); 1503 1504 error = 0; 1505 while (uio->uio_resid > 0) { 1506 read_argp->pvnr_ioflag = ap->a_ioflag; 1507 read_argp->pvnr_resid = tomove; 1508 read_argp->pvnr_offset = uio->uio_offset; 1509 puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred); 1510 1511 argsize = sizeof(struct puffs_vnreq_read); 1512 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1513 read_argp, argsize, tomove, 1514 ap->a_vp, NULL); 1515 if (error) 1516 break; 1517 1518 if (read_argp->pvnr_resid > tomove) { 1519 error = EINVAL; 1520 break; 1521 } 1522 1523 error = uiomove(read_argp->pvnr_data, 1524 tomove - read_argp->pvnr_resid, uio); 1525 1526 /* 1527 * in case the file is out of juice, resid from 1528 * userspace is != 0. and the error-case is 1529 * quite obvious 1530 */ 1531 if (error || read_argp->pvnr_resid) 1532 break; 1533 1534 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1535 } 1536 } 1537 1538 if (read_argp) 1539 free(read_argp, M_PUFFS); 1540 return error; 1541 } 1542 1543 int 1544 puffs_write(void *v) 1545 { 1546 struct vop_write_args /* { 1547 const struct vnodeop_desc *a_desc; 1548 struct vnode *a_vp; 1549 struct uio *a_uio; 1550 int a_ioflag; 1551 kauth_cred_t a_cred; 1552 } */ *ap = v; 1553 struct puffs_vnreq_write *write_argp; 1554 struct puffs_mount *pmp; 1555 struct uio *uio; 1556 struct vnode *vp; 1557 size_t tomove, argsize; 1558 off_t oldoff, newoff, origoff; 1559 vsize_t bytelen; 1560 int error, uflags; 1561 int ubcflags; 1562 1563 vp = ap->a_vp; 1564 uio = ap->a_uio; 1565 error = uflags = 0; 1566 write_argp = NULL; 1567 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1568 1569 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1570 ubcflags = UBC_WRITE | UBC_PARTIALOK; 1571 if (UBC_WANT_UNMAP(vp)) 1572 ubcflags = UBC_UNMAP; 1573 1574 /* 1575 * userspace *should* be allowed to control this, 1576 * but with UBC it's a bit unclear how to handle it 1577 */ 1578 if (ap->a_ioflag & IO_APPEND) 1579 uio->uio_offset = vp->v_size; 1580 1581 origoff = uio->uio_offset; 1582 while (uio->uio_resid > 0) { 1583 uflags |= PUFFS_UPDATECTIME; 1584 uflags |= PUFFS_UPDATEMTIME; 1585 oldoff = uio->uio_offset; 1586 bytelen = uio->uio_resid; 1587 1588 newoff = oldoff + bytelen; 1589 if (vp->v_size < newoff) { 1590 uvm_vnp_setwritesize(vp, newoff); 1591 } 1592 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1593 ubcflags); 1594 1595 /* 1596 * In case of a ubc_uiomove() error, 1597 * opt to not extend the file at all and 1598 * return an error. Otherwise, if we attempt 1599 * to clear the memory we couldn't fault to, 1600 * we might generate a kernel page fault. 1601 */ 1602 if (vp->v_size < newoff) { 1603 if (error == 0) { 1604 uflags |= PUFFS_UPDATESIZE; 1605 uvm_vnp_setsize(vp, newoff); 1606 } else { 1607 uvm_vnp_setwritesize(vp, vp->v_size); 1608 } 1609 } 1610 if (error) 1611 break; 1612 1613 /* 1614 * If we're writing large files, flush to file server 1615 * every 64k. Otherwise we can very easily exhaust 1616 * kernel and user memory, as the file server cannot 1617 * really keep up with our writing speed. 1618 * 1619 * Note: this does *NOT* honor MNT_ASYNC, because 1620 * that gives userland too much say in the kernel. 1621 */ 1622 if (oldoff >> 16 != uio->uio_offset >> 16) { 1623 simple_lock(&vp->v_interlock); 1624 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1625 uio->uio_offset & ~0xffff, 1626 PGO_CLEANIT | PGO_SYNCIO); 1627 if (error) 1628 break; 1629 } 1630 } 1631 1632 /* synchronous I/O? */ 1633 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1634 simple_lock(&vp->v_interlock); 1635 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1636 round_page(uio->uio_offset), 1637 PGO_CLEANIT | PGO_SYNCIO); 1638 1639 /* write though page cache? */ 1640 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1641 simple_lock(&vp->v_interlock); 1642 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1643 round_page(uio->uio_offset), PGO_CLEANIT); 1644 } 1645 1646 puffs_updatenode(vp, uflags); 1647 } else { 1648 /* tomove is non-increasing */ 1649 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1650 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1651 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1652 1653 while (uio->uio_resid > 0) { 1654 write_argp->pvnr_ioflag = ap->a_ioflag; 1655 write_argp->pvnr_resid = tomove; 1656 write_argp->pvnr_offset = uio->uio_offset; 1657 puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred); 1658 error = uiomove(write_argp->pvnr_data, tomove, uio); 1659 if (error) 1660 break; 1661 1662 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1663 PUFFS_VN_WRITE, write_argp, argsize, 0, 1664 ap->a_vp, NULL); 1665 if (error) { 1666 /* restore uiomove */ 1667 uio->uio_resid += tomove; 1668 uio->uio_offset -= tomove; 1669 break; 1670 } 1671 if (write_argp->pvnr_resid > tomove) { 1672 /* 1673 * XXX: correct file size is a mystery, 1674 * we can only guess 1675 */ 1676 error = EINVAL; 1677 break; 1678 } 1679 1680 /* adjust file size */ 1681 if (vp->v_size < uio->uio_offset) 1682 uvm_vnp_setsize(vp, uio->uio_offset); 1683 1684 /* didn't move everything? bad userspace. bail */ 1685 if (write_argp->pvnr_resid != 0) { 1686 uio->uio_resid += write_argp->pvnr_resid; 1687 uio->uio_offset -= write_argp->pvnr_resid; 1688 error = EIO; 1689 break; 1690 } 1691 1692 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1693 } 1694 } 1695 1696 if (write_argp) 1697 free(write_argp, M_PUFFS); 1698 return error; 1699 } 1700 1701 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1702 1703 #define FCNIOCTL_ARG_MAX 1<<16 1704 int 1705 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1706 { 1707 1708 /* currently not supported */ 1709 return EOPNOTSUPP; 1710 #if 0 1711 /* struct vop_ioctl_args { 1712 const struct vnodeop_desc *a_desc; 1713 struct vnode *a_vp; 1714 u_long a_command; 1715 void *a_data; 1716 int a_fflag; 1717 kauth_cred_t a_cred; 1718 struct lwp *a_l; 1719 }*ap = v; */ 1720 struct puffs_mount *pmp; 1721 struct puffs_sizepark pspark; 1722 void *kernbuf; 1723 size_t copylen; 1724 int error; 1725 1726 PUFFS_VNREQ(fcnioctl); 1727 1728 /* 1729 * Since this op gives the filesystem (almost) complete control on 1730 * how much it is allowed to copy from the calling process 1731 * address space, do not enable it by default, since it would 1732 * be a whopping security hole. 1733 */ 1734 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1735 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1736 return EINVAL; /* only shoe that fits */ 1737 1738 /* fill in sizereq and store it */ 1739 pspark.pkso_reqid = puffs_getreqid(pmp); 1740 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1741 pspark.pkso_copybuf = ap->a_data; 1742 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1743 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1744 1745 /* then fill in actual request and shoot it off */ 1746 fcnioctl_arg.pvnr_command = ap->a_command; 1747 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1748 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1749 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1750 1751 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1752 &fcnioctl_arg, sizeof(fcnioctl_arg), 0, ap->a_vp, 1753 pspark.pkso_reqid, ap->a_vp, NULL); 1754 1755 /* if we don't need to copy data, we're done */ 1756 if (error || !fcnioctl_arg.pvnr_copyback) 1757 return error; 1758 1759 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1760 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1761 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1762 if (error) 1763 goto out; 1764 error = copyout(kernbuf, ap->a_data, copylen); 1765 1766 out: 1767 free(kernbuf, M_PUFFS); 1768 return error; 1769 #endif 1770 } 1771 1772 int 1773 puffs_ioctl(void *v) 1774 { 1775 1776 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1777 } 1778 1779 int 1780 puffs_fcntl(void *v) 1781 { 1782 1783 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1784 } 1785 1786 int 1787 puffs_print(void *v) 1788 { 1789 struct vop_print_args /* { 1790 struct vnode *a_vp; 1791 } */ *ap = v; 1792 struct puffs_mount *pmp; 1793 struct vnode *vp = ap->a_vp; 1794 struct puffs_node *pn = vp->v_data; 1795 1796 PUFFS_VNREQ(print); 1797 1798 pmp = MPTOPUFFSMP(vp->v_mount); 1799 1800 /* kernel portion */ 1801 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1802 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1803 if (vp->v_type == VFIFO) 1804 fifo_printinfo(vp); 1805 lockmgr_printinfo(&vp->v_lock); 1806 1807 /* userspace portion */ 1808 if (EXISTSOP(pmp, PRINT)) 1809 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1810 &print_arg, sizeof(print_arg), 0, ap->a_vp, NULL); 1811 1812 return 0; 1813 } 1814 1815 int 1816 puffs_pathconf(void *v) 1817 { 1818 struct vop_pathconf_args /* { 1819 const struct vnodeop_desc *a_desc; 1820 struct vnode *a_vp; 1821 int a_name; 1822 register_t *a_retval; 1823 } */ *ap = v; 1824 int error; 1825 1826 PUFFS_VNREQ(pathconf); 1827 1828 pathconf_arg.pvnr_name = ap->a_name; 1829 1830 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1831 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 0, 1832 ap->a_vp, NULL); 1833 if (error) 1834 return error; 1835 1836 *ap->a_retval = pathconf_arg.pvnr_retval; 1837 1838 return 0; 1839 } 1840 1841 int 1842 puffs_advlock(void *v) 1843 { 1844 struct vop_advlock_args /* { 1845 const struct vnodeop_desc *a_desc; 1846 struct vnode *a_vp; 1847 void *a_id; 1848 int a_op; 1849 struct flock *a_fl; 1850 int a_flags; 1851 } */ *ap = v; 1852 int error; 1853 1854 PUFFS_VNREQ(advlock); 1855 1856 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1857 if (error) 1858 return error; 1859 advlock_arg.pvnr_id = ap->a_id; 1860 advlock_arg.pvnr_op = ap->a_op; 1861 advlock_arg.pvnr_flags = ap->a_flags; 1862 1863 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1864 &advlock_arg, sizeof(advlock_arg), 0, ap->a_vp, NULL); 1865 } 1866 /* 1867 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1868 */ 1869 int 1870 puffs_strategy(void *v) 1871 { 1872 struct vop_strategy_args /* { 1873 const struct vnodeop_desc *a_desc; 1874 struct vnode *a_vp; 1875 struct buf *a_bp; 1876 } */ *ap = v; 1877 struct puffs_mount *pmp; 1878 struct vnode *vp = ap->a_vp; 1879 struct puffs_node *pn; 1880 struct puffs_vnreq_read *read_argp = NULL; 1881 struct puffs_vnreq_write *write_argp = NULL; 1882 struct buf *bp; 1883 size_t argsize; 1884 size_t tomove, moved; 1885 int error, dowritefaf; 1886 1887 pmp = MPTOPUFFSMP(vp->v_mount); 1888 bp = ap->a_bp; 1889 error = 0; 1890 dowritefaf = 0; 1891 pn = VPTOPP(vp); 1892 1893 if (((bp->b_flags & B_READ) && !EXISTSOP(pmp, READ)) 1894 || (((bp->b_flags & B_READ) == 0) && !EXISTSOP(pmp, WRITE))) { 1895 error = EOPNOTSUPP; 1896 goto out; 1897 } 1898 1899 /* 1900 * Short-circuit optimization: don't flush buffer in between 1901 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 1902 */ 1903 if (pn->pn_stat & PNODE_DYING) { 1904 KASSERT((bp->b_flags & B_READ) == 0); 1905 bp->b_resid = 0; 1906 goto out; 1907 } 1908 1909 #ifdef DIAGNOSTIC 1910 if (bp->b_bcount > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1911 panic("puffs_strategy: wildly inappropriate buf bcount %d", 1912 bp->b_bcount); 1913 #endif 1914 1915 /* 1916 * See explanation for the necessity of a FAF in puffs_fsync. 1917 * 1918 * Also, do FAF in case we're suspending. 1919 * See puffs_vfsops.c:pageflush() 1920 * 1921 * XXgoddamnX: B_WRITE is a "pseudo flag" 1922 */ 1923 if ((bp->b_flags & B_READ) == 0) { 1924 simple_lock(&vp->v_interlock); 1925 if (vp->v_flag & VXLOCK) 1926 dowritefaf = 1; 1927 if (pn->pn_stat & PNODE_SUSPEND) 1928 dowritefaf = 1; 1929 simple_unlock(&vp->v_interlock); 1930 } 1931 1932 if (bp->b_flags & B_ASYNC) 1933 dowritefaf = 1; 1934 1935 #ifdef DIAGNOSTIC 1936 if (curproc == uvm.pagedaemon_proc) 1937 KASSERT(dowritefaf); 1938 #endif 1939 1940 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 1941 1942 if ((bp->b_flags & (B_READ | B_ASYNC)) == (B_READ | B_ASYNC)) { 1943 argsize = sizeof(struct puffs_vnreq_read); 1944 read_argp = malloc(argsize + tomove, 1945 M_PUFFS, M_NOWAIT | M_ZERO); 1946 if (read_argp == NULL) { 1947 error = ENOMEM; 1948 goto out; 1949 } 1950 1951 read_argp->pvnr_ioflag = 0; 1952 read_argp->pvnr_resid = tomove; 1953 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1954 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1955 1956 puffs_vntouser_call(pmp, PUFFS_VN_READ, read_argp, 1957 argsize, tomove, puffs_parkdone_asyncbioread, bp, vp, NULL); 1958 error = 0; 1959 goto wayout; 1960 } else if (bp->b_flags & B_READ) { 1961 argsize = sizeof(struct puffs_vnreq_read); 1962 read_argp = malloc(argsize + tomove, 1963 M_PUFFS, M_WAITOK | M_ZERO); 1964 1965 read_argp->pvnr_ioflag = 0; 1966 read_argp->pvnr_resid = tomove; 1967 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1968 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1969 1970 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1971 read_argp, argsize, tomove, vp, NULL); 1972 1973 if (error) 1974 goto out; 1975 1976 if (read_argp->pvnr_resid > tomove) { 1977 error = EINVAL; 1978 goto out; 1979 } 1980 1981 moved = tomove - read_argp->pvnr_resid; 1982 1983 (void)memcpy(bp->b_data, read_argp->pvnr_data, moved); 1984 bp->b_resid = bp->b_bcount - moved; 1985 } else { 1986 /* 1987 * make pages read-only before we write them if we want 1988 * write caching info 1989 */ 1990 if (PUFFS_WCACHEINFO(pmp)) { 1991 struct uvm_object *uobj = &vp->v_uobj; 1992 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 1993 struct vm_page *vmp; 1994 int i; 1995 1996 for (i = 0; i < npages; i++) { 1997 vmp= uvm_pageratop((vaddr_t)bp->b_data 1998 + (i << PAGE_SHIFT)); 1999 DPRINTF(("puffs_strategy: write-protecting " 2000 "vp %p page %p, offset %" PRId64"\n", 2001 vp, vmp, vmp->offset)); 2002 simple_lock(&uobj->vmobjlock); 2003 vmp->flags |= PG_RDONLY; 2004 pmap_page_protect(vmp, VM_PROT_READ); 2005 simple_unlock(&uobj->vmobjlock); 2006 } 2007 } 2008 2009 argsize = sizeof(struct puffs_vnreq_write) + bp->b_bcount; 2010 write_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 2011 if (write_argp == NULL) { 2012 error = ENOMEM; 2013 goto out; 2014 } 2015 2016 write_argp->pvnr_ioflag = 0; 2017 write_argp->pvnr_resid = tomove; 2018 write_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 2019 puffs_credcvt(&write_argp->pvnr_cred, FSCRED); 2020 2021 (void)memcpy(&write_argp->pvnr_data, bp->b_data, tomove); 2022 2023 if (dowritefaf) { 2024 /* 2025 * assume FAF moves everything. frankly, we don't 2026 * really have a choice. 2027 */ 2028 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 2029 PUFFS_VN_WRITE, write_argp, argsize, vp); 2030 bp->b_resid = bp->b_bcount - tomove; 2031 } else { 2032 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 2033 PUFFS_VN_WRITE, write_argp, argsize, 0, vp, NULL); 2034 if (error) 2035 goto out; 2036 2037 moved = tomove - write_argp->pvnr_resid; 2038 if (write_argp->pvnr_resid > tomove) { 2039 error = EINVAL; 2040 goto out; 2041 } 2042 2043 bp->b_resid = bp->b_bcount - moved; 2044 if (write_argp->pvnr_resid != 0) 2045 error = EIO; 2046 } 2047 } 2048 2049 out: 2050 if (read_argp) 2051 free(read_argp, M_PUFFS); 2052 if (write_argp && !dowritefaf) 2053 free(write_argp, M_PUFFS); 2054 2055 if (error) { 2056 bp->b_error = error; 2057 bp->b_flags |= B_ERROR; 2058 } 2059 2060 if (error || ((bp->b_flags & (B_READ | B_ASYNC)) != (B_READ | B_ASYNC))) 2061 biodone(bp); 2062 wayout: 2063 return error; 2064 } 2065 2066 int 2067 puffs_mmap(void *v) 2068 { 2069 struct vop_mmap_args /* { 2070 const struct vnodeop_desc *a_desc; 2071 struct vnode *a_vp; 2072 int a_fflags; 2073 kauth_cred_t a_cred; 2074 struct lwp *a_l; 2075 } */ *ap = v; 2076 struct puffs_mount *pmp; 2077 int error; 2078 2079 PUFFS_VNREQ(mmap); 2080 2081 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2082 2083 if (!PUFFS_DOCACHE(pmp)) 2084 return genfs_eopnotsupp(v); 2085 2086 if (EXISTSOP(pmp, MMAP)) { 2087 mmap_arg.pvnr_fflags = ap->a_fflags; 2088 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 2089 mmap_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 2090 2091 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 2092 &mmap_arg, sizeof(mmap_arg), 0, 2093 ap->a_vp, NULL); 2094 } else { 2095 error = genfs_mmap(v); 2096 } 2097 2098 return error; 2099 } 2100 2101 2102 /* 2103 * The rest don't get a free trip to userspace and back, they 2104 * have to stay within the kernel. 2105 */ 2106 2107 /* 2108 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2109 * well, maybe somehow, somewhere, some day .... 2110 */ 2111 int 2112 puffs_bmap(void *v) 2113 { 2114 struct vop_bmap_args /* { 2115 const struct vnodeop_desc *a_desc; 2116 struct vnode *a_vp; 2117 daddr_t a_bn; 2118 struct vnode **a_vpp; 2119 daddr_t *a_bnp; 2120 int *a_runp; 2121 } */ *ap = v; 2122 struct puffs_mount *pmp; 2123 2124 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2125 2126 if (ap->a_vpp) 2127 *ap->a_vpp = ap->a_vp; 2128 if (ap->a_bnp) 2129 *ap->a_bnp = ap->a_bn; 2130 if (ap->a_runp) 2131 *ap->a_runp 2132 = (PUFFS_TOMOVE(pmp->pmp_req_maxsize, pmp)>>DEV_BSHIFT) - 1; 2133 2134 return 0; 2135 } 2136 2137 /* 2138 * Handle getpages faults in puffs. We let genfs_getpages() do most 2139 * of the dirty work, but we come in this route to do accounting tasks. 2140 * If the user server has specified functions for cache notifications 2141 * about reads and/or writes, we record which type of operation we got, 2142 * for which page range, and proceed to issue a FAF notification to the 2143 * server about it. 2144 */ 2145 int 2146 puffs_getpages(void *v) 2147 { 2148 struct vop_getpages_args /* { 2149 const struct vnodeop_desc *a_desc; 2150 struct vnode *a_vp; 2151 voff_t a_offset; 2152 struct vm_page **a_m; 2153 int *a_count; 2154 int a_centeridx; 2155 vm_prot_t a_access_type; 2156 int a_advice; 2157 int a_flags; 2158 } */ *ap = v; 2159 struct puffs_mount *pmp; 2160 struct vnode *vp; 2161 struct vm_page **pgs; 2162 struct puffs_cacheinfo *pcinfo = NULL; 2163 struct puffs_cacherun *pcrun; 2164 void *parkmem = NULL; 2165 size_t runsizes; 2166 int i, npages, si, streakon; 2167 int error, locked, write; 2168 2169 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2170 npages = *ap->a_count; 2171 pgs = ap->a_m; 2172 vp = ap->a_vp; 2173 locked = (ap->a_flags & PGO_LOCKED) != 0; 2174 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2175 2176 /* ccg xnaht - gets Wuninitialized wrong */ 2177 pcrun = NULL; 2178 runsizes = 0; 2179 2180 if (write && PUFFS_WCACHEINFO(pmp)) { 2181 /* allocate worst-case memory */ 2182 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2183 pcinfo = malloc(sizeof(struct puffs_cacheinfo) + runsizes, 2184 M_PUFFS, M_ZERO | locked ? M_NOWAIT : M_WAITOK); 2185 2186 /* 2187 * can't block if we're locked and can't mess up caching 2188 * information for fs server. so come back later, please 2189 */ 2190 if (pcinfo == NULL) { 2191 error = ENOMEM; 2192 goto out; 2193 } 2194 2195 parkmem = puffs_park_alloc(locked == 0); 2196 if (parkmem == NULL) { 2197 error = ENOMEM; 2198 goto out; 2199 } 2200 2201 pcrun = pcinfo->pcache_runs; 2202 } 2203 2204 error = genfs_getpages(v); 2205 if (error) 2206 goto out; 2207 2208 if (PUFFS_WCACHEINFO(pmp) == 0) 2209 goto out; 2210 2211 /* 2212 * Let's see whose fault it was and inform the user server of 2213 * possibly read/written pages. Map pages from read faults 2214 * strictly read-only, since otherwise we might miss info on 2215 * when the page is actually write-faulted to. 2216 */ 2217 if (!locked) 2218 simple_lock(&vp->v_uobj.vmobjlock); 2219 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2220 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2221 if (streakon && write) { 2222 streakon = 0; 2223 pcrun[si].pcache_runend 2224 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2225 si++; 2226 } 2227 continue; 2228 } 2229 if (streakon == 0 && write) { 2230 streakon = 1; 2231 pcrun[si].pcache_runstart = pgs[i]->offset; 2232 } 2233 2234 if (!write) 2235 pgs[i]->flags |= PG_RDONLY; 2236 } 2237 /* was the last page part of our streak? */ 2238 if (streakon) { 2239 pcrun[si].pcache_runend 2240 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2241 si++; 2242 } 2243 if (!locked) 2244 simple_unlock(&vp->v_uobj.vmobjlock); 2245 2246 KASSERT(si <= (npages / 2) + 1); 2247 2248 /* send results to userspace */ 2249 if (write) 2250 puffs_cacheop(pmp, parkmem, pcinfo, 2251 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2252 2253 out: 2254 if (error) { 2255 if (pcinfo != NULL) 2256 free(pcinfo, M_PUFFS); 2257 if (parkmem != NULL) 2258 puffs_park_release(parkmem, 1); 2259 } 2260 2261 return error; 2262 } 2263 2264 int 2265 puffs_lock(void *v) 2266 { 2267 struct vop_lock_args /* { 2268 struct vnode *a_vp; 2269 int a_flags; 2270 }*/ *ap = v; 2271 struct vnode *vp = ap->a_vp; 2272 struct mount *mp = vp->v_mount; 2273 2274 #if 0 2275 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2276 #endif 2277 2278 /* 2279 * XXX: this avoids deadlocking when we're suspending. 2280 * e.g. some ops holding the vnode lock might be blocked for 2281 * the vfs transaction lock so we'd deadlock. 2282 * 2283 * Now once again this is skating on the thin ice of modern life, 2284 * since we are breaking the consistency guarantee provided 2285 * _to the user server_ by vnode locking. Hopefully this will 2286 * get fixed soon enough by getting rid of the dependency on 2287 * vnode locks alltogether. 2288 */ 2289 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2290 if (ap->a_flags & LK_INTERLOCK) 2291 simple_unlock(&vp->v_interlock); 2292 return 0; 2293 } 2294 2295 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2296 } 2297 2298 int 2299 puffs_unlock(void *v) 2300 { 2301 struct vop_unlock_args /* { 2302 struct vnode *a_vp; 2303 int a_flags; 2304 } */ *ap = v; 2305 struct vnode *vp = ap->a_vp; 2306 struct mount *mp = vp->v_mount; 2307 2308 #if 0 2309 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2310 #endif 2311 2312 /* XXX: see puffs_lock() */ 2313 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2314 if (ap->a_flags & LK_INTERLOCK) 2315 simple_unlock(&vp->v_interlock); 2316 return 0; 2317 } 2318 2319 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2320 } 2321 2322 int 2323 puffs_islocked(void *v) 2324 { 2325 struct vop_islocked_args *ap = v; 2326 int rv; 2327 2328 rv = lockstatus(&ap->a_vp->v_lock); 2329 return rv; 2330 } 2331 2332 int 2333 puffs_generic(void *v) 2334 { 2335 struct vop_generic_args *ap = v; 2336 2337 (void)ap; 2338 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2339 2340 return EOPNOTSUPP; 2341 } 2342 2343 2344 /* 2345 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2346 * FAF update information for the puffs node first. 2347 */ 2348 int 2349 puffs_spec_read(void *v) 2350 { 2351 struct vop_read_args /* { 2352 const struct vnodeop_desc *a_desc; 2353 struct vnode *a_vp; 2354 struct uio *a_uio; 2355 int a_ioflag; 2356 kauth_cred_t a_cred; 2357 } */ *ap = v; 2358 2359 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2360 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2361 } 2362 2363 int 2364 puffs_spec_write(void *v) 2365 { 2366 struct vop_write_args /* { 2367 const struct vnodeop_desc *a_desc; 2368 struct vnode *a_vp; 2369 struct uio *a_uio; 2370 int a_ioflag; 2371 kauth_cred_t a_cred; 2372 }*/ *ap = v; 2373 2374 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2375 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2376 } 2377 2378 int 2379 puffs_fifo_read(void *v) 2380 { 2381 struct vop_read_args /* { 2382 const struct vnodeop_desc *a_desc; 2383 struct vnode *a_vp; 2384 struct uio *a_uio; 2385 int a_ioflag; 2386 kauth_cred_t a_cred; 2387 } */ *ap = v; 2388 2389 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2390 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2391 } 2392 2393 int 2394 puffs_fifo_write(void *v) 2395 { 2396 struct vop_write_args /* { 2397 const struct vnodeop_desc *a_desc; 2398 struct vnode *a_vp; 2399 struct uio *a_uio; 2400 int a_ioflag; 2401 kauth_cred_t a_cred; 2402 }*/ *ap = v; 2403 2404 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2405 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2406 } 2407
Indexes created Tue Sep 30 17:09:57 GMT 2025