puffs_vnops.c revision 1.70
1 /* $NetBSD: puffs_vnops.c,v 1.70 2007/05/18 14:25:30 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006, 2007 Antti Kantee. All Rights Reserved. 5 * 6 * Development of this software was supported by the 7 * Google Summer of Code program and the Ulla Tuominen Foundation. 8 * The Google SoC project was mentored by Bill Studenmund. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the company nor the name of the author may be used to 19 * endorse or promote products derived from this software without specific 20 * prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 23 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 25 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.70 2007/05/18 14:25:30 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 { &vop_poll_desc, puffs_poll }, /* REAL poll */ 150 151 { &vop_kqfilter_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 }, /* spec_mmap */ 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 (!ALLOPS(pmp)) { 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, dvp, NULL); 459 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 460 461 /* 462 * In case of error, there is no new vnode to play with, so be 463 * happy with the NULL value given to vpp in the beginning. 464 * Also, check if this really was an error or the target was not 465 * present. Either treat it as a non-error for CREATE/RENAME or 466 * enter the component into the negative name cache (if desired). 467 */ 468 if (error) { 469 if (error == ENOENT) { 470 if ((cnp->cn_flags & ISLASTCN) 471 && (cnp->cn_nameiop == CREATE 472 || cnp->cn_nameiop == RENAME)) { 473 cnp->cn_flags |= SAVENAME; 474 error = EJUSTRETURN; 475 } else { 476 if ((cnp->cn_flags & MAKEENTRY) 477 && PUFFS_DOCACHE(pmp)) 478 cache_enter(dvp, NULL, cnp); 479 } 480 } else if (error < 0) { 481 error = EINVAL; 482 } 483 goto errout; 484 } 485 486 /* 487 * Check that we don't get our parent node back, that would cause 488 * a pretty obvious deadlock. 489 */ 490 dpn = dvp->v_data; 491 if (lookup_arg.pvnr_newnode == dpn->pn_cookie) { 492 error = EINVAL; 493 goto errout; 494 } 495 496 /* XXX: race here */ 497 /* XXX2: this check for node existence twice */ 498 vp = puffs_pnode2vnode(pmp, lookup_arg.pvnr_newnode, 1); 499 if (!vp) { 500 error = puffs_getvnode(dvp->v_mount, 501 lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype, 502 lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp); 503 if (error) { 504 goto errout; 505 } 506 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 507 } 508 *ap->a_vpp = vp; 509 510 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_DOCACHE(pmp)) 511 cache_enter(dvp, vp, cnp); 512 513 errout: 514 if (cnp->cn_flags & ISDOTDOT) 515 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 516 517 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 518 return error; 519 } 520 521 int 522 puffs_create(void *v) 523 { 524 struct vop_create_args /* { 525 const struct vnodeop_desc *a_desc; 526 struct vnode *a_dvp; 527 struct vnode **a_vpp; 528 struct componentname *a_cnp; 529 struct vattr *a_vap; 530 } */ *ap = v; 531 int error; 532 533 PUFFS_VNREQ(create); 534 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 535 ap->a_dvp, ap->a_cnp->cn_nameptr)); 536 537 puffs_makecn(&create_arg.pvnr_cn, ap->a_cnp); 538 create_arg.pvnr_va = *ap->a_vap; 539 540 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_CREATE, 541 &create_arg, sizeof(create_arg), 0, ap->a_dvp, NULL); 542 if (error) 543 goto out; 544 545 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 546 create_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 0); 547 /* XXX: in case of error, need to uncommit userspace transaction */ 548 549 out: 550 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 551 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 552 vput(ap->a_dvp); 553 554 DPRINTF(("puffs_create: return %d\n", error)); 555 return error; 556 } 557 558 int 559 puffs_mknod(void *v) 560 { 561 struct vop_mknod_args /* { 562 const struct vnodeop_desc *a_desc; 563 struct vnode *a_dvp; 564 struct vnode **a_vpp; 565 struct componentname *a_cnp; 566 struct vattr *a_vap; 567 } */ *ap = v; 568 int error; 569 570 PUFFS_VNREQ(mknod); 571 572 puffs_makecn(&mknod_arg.pvnr_cn, ap->a_cnp); 573 mknod_arg.pvnr_va = *ap->a_vap; 574 575 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKNOD, 576 &mknod_arg, sizeof(mknod_arg), 0, ap->a_dvp, NULL); 577 if (error) 578 goto out; 579 580 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 581 mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 582 ap->a_vap->va_rdev); 583 584 out: 585 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 586 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 587 vput(ap->a_dvp); 588 return error; 589 } 590 591 int 592 puffs_open(void *v) 593 { 594 struct vop_open_args /* { 595 const struct vnodeop_desc *a_desc; 596 struct vnode *a_vp; 597 int a_mode; 598 kauth_cred_t a_cred; 599 struct lwp *a_l; 600 } */ *ap = v; 601 struct vnode *vp = ap->a_vp; 602 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 603 int mode = ap->a_mode; 604 int rv; 605 606 PUFFS_VNREQ(open); 607 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 608 609 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) { 610 rv = EROFS; 611 goto out; 612 } 613 614 if (!EXISTSOP(pmp, OPEN)) { 615 rv = 0; 616 goto out; 617 } 618 619 open_arg.pvnr_mode = mode; 620 puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred); 621 open_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 622 623 rv = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_OPEN, 624 &open_arg, sizeof(open_arg), 0, vp, NULL); 625 626 out: 627 DPRINTF(("puffs_open: returning %d\n", rv)); 628 return rv; 629 } 630 631 int 632 puffs_close(void *v) 633 { 634 struct vop_close_args /* { 635 const struct vnodeop_desc *a_desc; 636 struct vnode *a_vp; 637 int a_fflag; 638 kauth_cred_t a_cred; 639 struct lwp *a_l; 640 } */ *ap = v; 641 struct puffs_vnreq_close *close_argp; 642 643 close_argp = malloc(sizeof(struct puffs_vnreq_close), 644 M_PUFFS, M_WAITOK | M_ZERO); 645 close_argp->pvnr_fflag = ap->a_fflag; 646 puffs_credcvt(&close_argp->pvnr_cred, ap->a_cred); 647 close_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 648 649 puffs_vntouser_faf(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 650 close_argp, sizeof(struct puffs_vnreq_close), ap->a_vp); 651 652 return 0; 653 } 654 655 int 656 puffs_access(void *v) 657 { 658 struct vop_access_args /* { 659 const struct vnodeop_desc *a_desc; 660 struct vnode *a_vp; 661 int a_mode; 662 kauth_cred_t a_cred; 663 struct lwp *a_l; 664 } */ *ap = v; 665 struct vnode *vp = ap->a_vp; 666 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 667 int mode = ap->a_mode; 668 669 PUFFS_VNREQ(access); 670 671 if (vp->v_type == VREG && mode & VWRITE && !EXISTSOP(pmp, WRITE)) 672 return EROFS; 673 674 if (!EXISTSOP(pmp, ACCESS)) 675 return 0; 676 677 access_arg.pvnr_mode = ap->a_mode; 678 access_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 679 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 680 681 return puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_ACCESS, 682 &access_arg, sizeof(access_arg), 0, vp, NULL); 683 } 684 685 int 686 puffs_getattr(void *v) 687 { 688 struct vop_getattr_args /* { 689 const struct vnodeop_desc *a_desc; 690 struct vnode *a_vp; 691 struct vattr *a_vap; 692 kauth_cred_t a_cred; 693 struct lwp *a_l; 694 } */ *ap = v; 695 struct mount *mp; 696 struct vnode *vp; 697 struct vattr *vap, *rvap; 698 struct puffs_node *pn; 699 int error; 700 701 PUFFS_VNREQ(getattr); 702 703 vp = ap->a_vp; 704 mp = vp->v_mount; 705 vap = ap->a_vap; 706 707 vattr_null(&getattr_arg.pvnr_va); 708 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 709 getattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 710 711 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_GETATTR, 712 &getattr_arg, sizeof(getattr_arg), 0, vp, NULL); 713 if (error) 714 return error; 715 716 rvap = &getattr_arg.pvnr_va; 717 /* 718 * Don't listen to the file server regarding special device 719 * size info, the file server doesn't know anything about them. 720 */ 721 if (vp->v_type == VBLK || vp->v_type == VCHR) 722 rvap->va_size = vp->v_size; 723 724 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 725 if (vp->v_type == VBLK) 726 rvap->va_blocksize = BLKDEV_IOSIZE; 727 else if (vp->v_type == VCHR) 728 rvap->va_blocksize = MAXBSIZE; 729 730 (void) memcpy(vap, rvap, sizeof(struct vattr)); 731 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 732 733 pn = VPTOPP(vp); 734 if (pn->pn_stat & PNODE_METACACHE_ATIME) 735 vap->va_atime = pn->pn_mc_atime; 736 if (pn->pn_stat & PNODE_METACACHE_CTIME) 737 vap->va_ctime = pn->pn_mc_ctime; 738 if (pn->pn_stat & PNODE_METACACHE_MTIME) 739 vap->va_mtime = pn->pn_mc_mtime; 740 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 741 vap->va_size = pn->pn_mc_size; 742 } else { 743 if (rvap->va_size != VNOVAL 744 && vp->v_type != VBLK && vp->v_type != VCHR) 745 uvm_vnp_setsize(vp, rvap->va_size); 746 } 747 748 return 0; 749 } 750 751 int 752 puffs_setattr(void *v) 753 { 754 struct vop_getattr_args /* { 755 const struct vnodeop_desc *a_desc; 756 struct vnode *a_vp; 757 struct vattr *a_vap; 758 kauth_cred_t a_cred; 759 struct lwp *a_l; 760 } */ *ap = v; 761 int error; 762 struct vattr *vap = ap->a_vap; 763 struct puffs_node *pn = ap->a_vp->v_data; 764 765 PUFFS_VNREQ(setattr); 766 767 /* 768 * Flush metacache first. If we are called with some explicit 769 * parameters, treat them as information overriding metacache 770 * information. 771 */ 772 if (pn->pn_stat & PNODE_METACACHE_MASK) { 773 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 774 && vap->va_atime.tv_sec == VNOVAL) 775 vap->va_atime = pn->pn_mc_atime; 776 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 777 && vap->va_ctime.tv_sec == VNOVAL) 778 vap->va_ctime = pn->pn_mc_ctime; 779 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 780 && vap->va_mtime.tv_sec == VNOVAL) 781 vap->va_mtime = pn->pn_mc_mtime; 782 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 783 && vap->va_size == VNOVAL) 784 vap->va_size = pn->pn_mc_size; 785 786 pn->pn_stat &= ~PNODE_METACACHE_MASK; 787 } 788 789 (void)memcpy(&setattr_arg.pvnr_va, vap, sizeof(struct vattr)); 790 puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred); 791 setattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 792 793 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR, 794 &setattr_arg, sizeof(setattr_arg), 0, ap->a_vp, NULL); 795 if (error) 796 return error; 797 798 if (vap->va_size != VNOVAL) 799 uvm_vnp_setsize(ap->a_vp, vap->va_size); 800 801 return 0; 802 } 803 804 int 805 puffs_inactive(void *v) 806 { 807 struct vop_inactive_args /* { 808 const struct vnodeop_desc *a_desc; 809 struct vnode *a_vp; 810 struct lwp *a_l; 811 } */ *ap = v; 812 struct puffs_mount *pmp; 813 struct puffs_node *pnode; 814 int rv, vnrefs, call; 815 816 PUFFS_VNREQ(inactive); 817 818 /* 819 * XXX: think about this after we really start unlocking 820 * when going to userspace 821 */ 822 pnode = ap->a_vp->v_data; 823 824 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 825 826 inactive_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 827 828 if (EXISTSOP(pmp, INACTIVE)) 829 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 830 if ((pnode->pn_stat & PNODE_DOINACT) || ALLOPS(pmp)) 831 call = 1; 832 else 833 call = 0; 834 else 835 call = 1; 836 else 837 call = 0; 838 839 if (call) 840 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 841 &inactive_arg, sizeof(inactive_arg), 0, ap->a_vp, NULL); 842 else 843 rv = 1; /* see below */ 844 pnode->pn_stat &= ~PNODE_DOINACT; 845 846 /* can't trust userspace return value? simulate safe answer */ 847 if (rv) 848 vnrefs = 1; 849 else 850 vnrefs = inactive_arg.pvnr_backendrefs; 851 852 VOP_UNLOCK(ap->a_vp, 0); 853 854 /* 855 * user server thinks it's gone? then don't be afraid care, 856 * node's life was already all it would ever be 857 */ 858 if (vnrefs == 0) { 859 pnode->pn_stat |= PNODE_NOREFS; 860 vrecycle(ap->a_vp, NULL, ap->a_l); 861 } 862 863 return 0; 864 } 865 866 /* 867 * always FAF, we don't really care if the server wants to fail to 868 * reclaim the node or not 869 */ 870 int 871 puffs_reclaim(void *v) 872 { 873 struct vop_reclaim_args /* { 874 const struct vnodeop_desc *a_desc; 875 struct vnode *a_vp; 876 struct lwp *a_l; 877 } */ *ap = v; 878 struct puffs_mount *pmp; 879 struct puffs_vnreq_reclaim *reclaim_argp; 880 881 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 882 883 /* 884 * first things first: check if someone is trying to reclaim the 885 * root vnode. do not allow that to travel to userspace. 886 * Note that we don't need to take the lock similarly to 887 * puffs_root(), since there is only one of us. 888 */ 889 if (ap->a_vp->v_flag & VROOT) { 890 mutex_enter(&pmp->pmp_lock); 891 KASSERT(pmp->pmp_root != NULL); 892 pmp->pmp_root = NULL; 893 mutex_exit(&pmp->pmp_lock); 894 goto out; 895 } 896 897 if (!EXISTSOP(pmp, RECLAIM)) 898 goto out; 899 900 reclaim_argp = malloc(sizeof(struct puffs_vnreq_reclaim), 901 M_PUFFS, M_WAITOK | M_ZERO); 902 reclaim_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 903 904 puffs_vntouser_faf(pmp, PUFFS_VN_RECLAIM, 905 reclaim_argp, sizeof(struct puffs_vnreq_reclaim), ap->a_vp); 906 907 out: 908 if (PUFFS_DOCACHE(pmp)) 909 cache_purge(ap->a_vp); 910 puffs_putvnode(ap->a_vp); 911 912 return 0; 913 } 914 915 #define CSIZE sizeof(**ap->a_cookies) 916 int 917 puffs_readdir(void *v) 918 { 919 struct vop_readdir_args /* { 920 const struct vnodeop_desc *a_desc; 921 struct vnode *a_vp; 922 struct uio *a_uio; 923 kauth_cred_t a_cred; 924 int *a_eofflag; 925 off_t **a_cookies; 926 int *a_ncookies; 927 } */ *ap = v; 928 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 929 struct puffs_vnreq_readdir *readdir_argp; 930 size_t argsize, tomove, cookiemem, cookiesmax; 931 struct uio *uio = ap->a_uio; 932 size_t howmuch; 933 int error; 934 935 if (ap->a_cookies) { 936 KASSERT(ap->a_ncookies != NULL); 937 if (pmp->pmp_args.pa_fhsize == 0) 938 return EOPNOTSUPP; 939 cookiesmax = uio->uio_resid/_DIRENT_MINSIZE((struct dirent *)0); 940 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 941 } else { 942 cookiesmax = 0; 943 cookiemem = 0; 944 } 945 946 argsize = sizeof(struct puffs_vnreq_readdir); 947 tomove = uio->uio_resid + cookiemem; 948 readdir_argp = malloc(argsize + tomove, M_PUFFS, M_ZERO | M_WAITOK); 949 950 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 951 readdir_argp->pvnr_offset = uio->uio_offset; 952 readdir_argp->pvnr_resid = uio->uio_resid; 953 readdir_argp->pvnr_ncookies = cookiesmax; 954 readdir_argp->pvnr_eofflag = 0; 955 readdir_argp->pvnr_dentoff = cookiemem; 956 957 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 958 PUFFS_VN_READDIR, readdir_argp, argsize, tomove, 959 ap->a_vp, NULL); 960 if (error) 961 goto out; 962 963 /* userspace is cheating? */ 964 if (readdir_argp->pvnr_resid > uio->uio_resid 965 || readdir_argp->pvnr_ncookies > cookiesmax) { 966 error = EINVAL; 967 goto out; 968 } 969 970 /* check eof */ 971 if (readdir_argp->pvnr_eofflag) 972 *ap->a_eofflag = 1; 973 974 /* bouncy-wouncy with the directory data */ 975 howmuch = uio->uio_resid - readdir_argp->pvnr_resid; 976 977 /* force eof if no data was returned (getcwd() needs this) */ 978 if (howmuch == 0) { 979 *ap->a_eofflag = 1; 980 goto out; 981 } 982 983 error = uiomove(readdir_argp->pvnr_data + cookiemem, howmuch, uio); 984 if (error) 985 goto out; 986 987 /* provide cookies to caller if so desired */ 988 if (ap->a_cookies) { 989 *ap->a_cookies = malloc(readdir_argp->pvnr_ncookies*CSIZE, 990 M_TEMP, M_WAITOK); 991 *ap->a_ncookies = readdir_argp->pvnr_ncookies; 992 memcpy(*ap->a_cookies, readdir_argp->pvnr_data, 993 *ap->a_ncookies*CSIZE); 994 } 995 996 /* next readdir starts here */ 997 uio->uio_offset = readdir_argp->pvnr_offset; 998 999 out: 1000 free(readdir_argp, M_PUFFS); 1001 return error; 1002 } 1003 #undef CSIZE 1004 1005 /* 1006 * poll works by consuming the bitmask in pn_revents. If there are 1007 * events available, poll returns immediately. If not, it issues a 1008 * poll to userspace, selrecords itself and returns with no available 1009 * events. When the file server returns, it executes puffs_parkdone_poll(), 1010 * where available events are added to the bitmask. selnotify() is 1011 * then also executed by that function causing us to enter here again 1012 * and hopefully find the missing bits (unless someone got them first, 1013 * in which case it starts all over again). 1014 */ 1015 int 1016 puffs_poll(void *v) 1017 { 1018 struct vop_poll_args /* { 1019 const struct vnodeop_desc *a_desc; 1020 struct vnode *a_vp; 1021 int a_events; 1022 struct lwp *a_l; 1023 }*/ *ap = v; 1024 struct vnode *vp = ap->a_vp; 1025 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1026 struct puffs_vnreq_poll *poll_argp; 1027 struct puffs_node *pn = vp->v_data; 1028 int events; 1029 1030 if (EXISTSOP(pmp, POLL)) { 1031 mutex_enter(&pn->pn_mtx); 1032 events = pn->pn_revents & ap->a_events; 1033 if (events & ap->a_events) { 1034 pn->pn_revents &= ~ap->a_events; 1035 mutex_exit(&pn->pn_mtx); 1036 1037 return events; 1038 } else { 1039 puffs_referencenode(pn); 1040 mutex_exit(&pn->pn_mtx); 1041 1042 /* freed in puffs_parkdone_poll */ 1043 poll_argp = malloc(sizeof(struct puffs_vnreq_poll), 1044 M_PUFFS, M_ZERO | M_WAITOK); 1045 1046 poll_argp->pvnr_events = ap->a_events; 1047 poll_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 1048 1049 selrecord(ap->a_l, &pn->pn_sel); 1050 puffs_vntouser_call(pmp, PUFFS_VN_POLL, 1051 poll_argp, sizeof(struct puffs_vnreq_poll), 0, 1052 puffs_parkdone_poll, pn, 1053 vp, NULL); 1054 1055 return 0; 1056 } 1057 } else { 1058 return genfs_poll(v); 1059 } 1060 } 1061 1062 int 1063 puffs_fsync(void *v) 1064 { 1065 struct vop_fsync_args /* { 1066 const struct vnodeop_desc *a_desc; 1067 struct vnode *a_vp; 1068 kauth_cred_t a_cred; 1069 int a_flags; 1070 off_t a_offlo; 1071 off_t a_offhi; 1072 struct lwp *a_l; 1073 } */ *ap = v; 1074 struct vattr va; 1075 struct puffs_mount *pmp; 1076 struct puffs_vnreq_fsync *fsync_argp; 1077 struct vnode *vp; 1078 struct puffs_node *pn; 1079 int pflags, error, dofaf; 1080 1081 PUFFS_VNREQ(fsync); 1082 1083 vp = ap->a_vp; 1084 pn = VPTOPP(vp); 1085 pmp = MPTOPUFFSMP(vp->v_mount); 1086 1087 /* flush out information from our metacache, see vop_setattr */ 1088 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1089 vattr_null(&va); 1090 error = VOP_SETATTR(vp, &va, FSCRED, NULL); 1091 if (error) 1092 return error; 1093 } 1094 1095 /* 1096 * flush pages to avoid being overly dirty 1097 */ 1098 pflags = PGO_CLEANIT; 1099 if (ap->a_flags & FSYNC_WAIT) 1100 pflags |= PGO_SYNCIO; 1101 simple_lock(&vp->v_interlock); 1102 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1103 round_page(ap->a_offhi), pflags); 1104 if (error) 1105 return error; 1106 1107 /* 1108 * HELLO! We exit already here if the user server does not 1109 * support fsync OR if we should call fsync for a node which 1110 * has references neither in the kernel or the fs server. 1111 * Otherwise we continue to issue fsync() forward. 1112 */ 1113 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_NOREFS)) 1114 return 0; 1115 1116 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1117 /* 1118 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1119 * only FAFs for those. Otherwise there's a danger of deadlock, 1120 * since the execution context here might be the user server 1121 * doing some operation on another fs, which in turn caused a 1122 * vnode to be reclaimed from the freelist for this fs. 1123 */ 1124 if (dofaf == 0) { 1125 simple_lock(&vp->v_interlock); 1126 if (vp->v_flag & VXLOCK) 1127 dofaf = 1; 1128 simple_unlock(&vp->v_interlock); 1129 } 1130 1131 if (dofaf == 0) { 1132 fsync_argp = &fsync_arg; 1133 } else { 1134 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 1135 M_PUFFS, M_ZERO | M_NOWAIT); 1136 if (fsync_argp == NULL) 1137 return ENOMEM; 1138 } 1139 1140 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 1141 fsync_argp->pvnr_flags = ap->a_flags; 1142 fsync_argp->pvnr_offlo = ap->a_offlo; 1143 fsync_argp->pvnr_offhi = ap->a_offhi; 1144 fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 1145 1146 /* 1147 * XXX: see comment at puffs_getattr about locking 1148 * 1149 * If we are not required to wait, do a FAF operation. 1150 * Otherwise block here. 1151 */ 1152 if (dofaf == 0) { 1153 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1154 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 0, 1155 vp, NULL); 1156 } else { 1157 /* FAF is always "succesful" */ 1158 error = 0; 1159 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1160 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), vp); 1161 } 1162 1163 return error; 1164 } 1165 1166 int 1167 puffs_seek(void *v) 1168 { 1169 struct vop_seek_args /* { 1170 const struct vnodeop_desc *a_desc; 1171 struct vnode *a_vp; 1172 off_t a_oldoff; 1173 off_t a_newoff; 1174 kauth_cred_t a_cred; 1175 } */ *ap = v; 1176 1177 PUFFS_VNREQ(seek); 1178 1179 seek_arg.pvnr_oldoff = ap->a_oldoff; 1180 seek_arg.pvnr_newoff = ap->a_newoff; 1181 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1182 1183 /* 1184 * XXX: seems like seek is called with an unlocked vp, but 1185 * it can't hurt to play safe 1186 */ 1187 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1188 &seek_arg, sizeof(seek_arg), 0, ap->a_vp, NULL); 1189 } 1190 1191 int 1192 puffs_remove(void *v) 1193 { 1194 struct vop_remove_args /* { 1195 const struct vnodeop_desc *a_desc; 1196 struct vnode *a_dvp; 1197 struct vnode *a_vp; 1198 struct componentname *a_cnp; 1199 } */ *ap = v; 1200 int error; 1201 1202 PUFFS_VNREQ(remove); 1203 1204 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1205 puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp); 1206 1207 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE, 1208 &remove_arg, sizeof(remove_arg), 0, ap->a_dvp, ap->a_vp); 1209 1210 vput(ap->a_vp); 1211 if (ap->a_dvp == ap->a_vp) 1212 vrele(ap->a_dvp); 1213 else 1214 vput(ap->a_dvp); 1215 1216 return error; 1217 } 1218 1219 int 1220 puffs_mkdir(void *v) 1221 { 1222 struct vop_mkdir_args /* { 1223 const struct vnodeop_desc *a_desc; 1224 struct vnode *a_dvp; 1225 struct vnode **a_vpp; 1226 struct componentname *a_cnp; 1227 struct vattr *a_vap; 1228 } */ *ap = v; 1229 int error; 1230 1231 PUFFS_VNREQ(mkdir); 1232 1233 puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp); 1234 mkdir_arg.pvnr_va = *ap->a_vap; 1235 1236 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR, 1237 &mkdir_arg, sizeof(mkdir_arg), 0, ap->a_dvp, NULL); 1238 if (error) 1239 goto out; 1240 1241 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1242 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1243 1244 out: 1245 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1246 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1247 vput(ap->a_dvp); 1248 return error; 1249 } 1250 1251 int 1252 puffs_rmdir(void *v) 1253 { 1254 struct vop_rmdir_args /* { 1255 const struct vnodeop_desc *a_desc; 1256 struct vnode *a_dvp; 1257 struct vnode *a_vp; 1258 struct componentname *a_cnp; 1259 } */ *ap = v; 1260 int error; 1261 1262 PUFFS_VNREQ(rmdir); 1263 1264 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1265 puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp); 1266 1267 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR, 1268 &rmdir_arg, sizeof(rmdir_arg), 0, ap->a_dvp, ap->a_vp); 1269 1270 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1271 1272 vput(ap->a_dvp); 1273 vput(ap->a_vp); 1274 1275 return error; 1276 } 1277 1278 int 1279 puffs_link(void *v) 1280 { 1281 struct vop_link_args /* { 1282 const struct vnodeop_desc *a_desc; 1283 struct vnode *a_dvp; 1284 struct vnode *a_vp; 1285 struct componentname *a_cnp; 1286 }*/ *ap = v; 1287 int error; 1288 1289 PUFFS_VNREQ(link); 1290 1291 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1292 puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp); 1293 1294 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK, 1295 &link_arg, sizeof(link_arg), 0, ap->a_dvp, ap->a_vp); 1296 1297 /* 1298 * XXX: stay in touch with the cache. I don't like this, but 1299 * don't have a better solution either. See also puffs_rename(). 1300 */ 1301 if (error == 0) 1302 puffs_updatenode(ap->a_vp, PUFFS_UPDATECTIME); 1303 1304 vput(ap->a_dvp); 1305 1306 return error; 1307 } 1308 1309 int 1310 puffs_symlink(void *v) 1311 { 1312 struct vop_symlink_args /* { 1313 const struct vnodeop_desc *a_desc; 1314 struct vnode *a_dvp; 1315 struct vnode **a_vpp; 1316 struct componentname *a_cnp; 1317 struct vattr *a_vap; 1318 char *a_target; 1319 }*/ *ap = v; 1320 int error; 1321 1322 PUFFS_VNREQ(symlink); /* XXX: large structure */ 1323 1324 *ap->a_vpp = NULL; 1325 1326 puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp); 1327 symlink_arg.pvnr_va = *ap->a_vap; 1328 (void)strlcpy(symlink_arg.pvnr_link, ap->a_target, 1329 sizeof(symlink_arg.pvnr_link)); 1330 1331 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), 1332 PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg), 0, 1333 ap->a_dvp, NULL); 1334 if (error) 1335 goto out; 1336 1337 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1338 symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0); 1339 1340 out: 1341 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1342 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1343 vput(ap->a_dvp); 1344 return error; 1345 } 1346 1347 int 1348 puffs_readlink(void *v) 1349 { 1350 struct vop_readlink_args /* { 1351 const struct vnodeop_desc *a_desc; 1352 struct vnode *a_vp; 1353 struct uio *a_uio; 1354 kauth_cred_t a_cred; 1355 } */ *ap = v; 1356 size_t linklen; 1357 int error; 1358 1359 PUFFS_VNREQ(readlink); 1360 1361 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1362 linklen = sizeof(readlink_arg.pvnr_link); 1363 readlink_arg.pvnr_linklen = linklen; 1364 1365 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1366 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 0, 1367 ap->a_vp, NULL); 1368 if (error) 1369 return error; 1370 1371 /* bad bad user file server */ 1372 if (readlink_arg.pvnr_linklen > linklen) 1373 return EINVAL; 1374 1375 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1376 ap->a_uio); 1377 } 1378 1379 /* XXXXXXX: think about locking & userspace op delocking... */ 1380 int 1381 puffs_rename(void *v) 1382 { 1383 struct vop_rename_args /* { 1384 const struct vnodeop_desc *a_desc; 1385 struct vnode *a_fdvp; 1386 struct vnode *a_fvp; 1387 struct componentname *a_fcnp; 1388 struct vnode *a_tdvp; 1389 struct vnode *a_tvp; 1390 struct componentname *a_tcnp; 1391 }*/ *ap = v; 1392 int error; 1393 1394 PUFFS_VNREQ(rename); 1395 1396 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) { 1397 error = EXDEV; 1398 goto out; 1399 } 1400 1401 rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1402 rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1403 if (ap->a_tvp) 1404 rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1405 else 1406 rename_arg.pvnr_cookie_targ = NULL; 1407 puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp); 1408 puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp); 1409 1410 error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount), 1411 PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg), 0, 1412 ap->a_fdvp, NULL); /* XXX */ 1413 1414 /* 1415 * XXX: stay in touch with the cache. I don't like this, but 1416 * don't have a better solution either. See also puffs_link(). 1417 */ 1418 if (error == 0) 1419 puffs_updatenode(ap->a_fvp, PUFFS_UPDATECTIME); 1420 1421 out: 1422 if (ap->a_tvp != NULL) 1423 vput(ap->a_tvp); 1424 if (ap->a_tdvp == ap->a_tvp) 1425 vrele(ap->a_tdvp); 1426 else 1427 vput(ap->a_tdvp); 1428 1429 vrele(ap->a_fdvp); 1430 vrele(ap->a_fvp); 1431 1432 return error; 1433 } 1434 1435 int 1436 puffs_read(void *v) 1437 { 1438 struct vop_read_args /* { 1439 const struct vnodeop_desc *a_desc; 1440 struct vnode *a_vp; 1441 struct uio *a_uio; 1442 int a_ioflag; 1443 kauth_cred_t a_cred; 1444 } */ *ap = v; 1445 struct puffs_vnreq_read *read_argp; 1446 struct puffs_mount *pmp; 1447 struct vnode *vp; 1448 struct uio *uio; 1449 void *win; 1450 size_t tomove, argsize; 1451 vsize_t bytelen; 1452 int error, ubcflags; 1453 1454 uio = ap->a_uio; 1455 vp = ap->a_vp; 1456 read_argp = NULL; 1457 error = 0; 1458 pmp = MPTOPUFFSMP(vp->v_mount); 1459 1460 /* std sanity */ 1461 if (uio->uio_resid == 0) 1462 return 0; 1463 if (uio->uio_offset < 0) 1464 return EINVAL; 1465 1466 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1467 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1468 1469 ubcflags = 0; 1470 if (UBC_WANT_UNMAP(vp)) 1471 ubcflags = UBC_UNMAP; 1472 1473 while (uio->uio_resid > 0) { 1474 bytelen = MIN(uio->uio_resid, 1475 vp->v_size - uio->uio_offset); 1476 if (bytelen == 0) 1477 break; 1478 1479 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1480 &bytelen, advice, UBC_READ); 1481 error = uiomove(win, bytelen, uio); 1482 ubc_release(win, ubcflags); 1483 if (error) 1484 break; 1485 } 1486 1487 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1488 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1489 } else { 1490 /* 1491 * in case it's not a regular file or we're operating 1492 * uncached, do read in the old-fashioned style, 1493 * i.e. explicit read operations 1494 */ 1495 1496 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1497 argsize = sizeof(struct puffs_vnreq_read); 1498 read_argp = malloc(argsize + tomove, 1499 M_PUFFS, M_WAITOK | M_ZERO); 1500 1501 error = 0; 1502 while (uio->uio_resid > 0) { 1503 read_argp->pvnr_ioflag = ap->a_ioflag; 1504 read_argp->pvnr_resid = tomove; 1505 read_argp->pvnr_offset = uio->uio_offset; 1506 puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred); 1507 1508 argsize = sizeof(struct puffs_vnreq_read); 1509 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1510 read_argp, argsize, tomove, 1511 ap->a_vp, NULL); 1512 if (error) 1513 break; 1514 1515 if (read_argp->pvnr_resid > tomove) { 1516 error = EINVAL; 1517 break; 1518 } 1519 1520 error = uiomove(read_argp->pvnr_data, 1521 tomove - read_argp->pvnr_resid, uio); 1522 1523 /* 1524 * in case the file is out of juice, resid from 1525 * userspace is != 0. and the error-case is 1526 * quite obvious 1527 */ 1528 if (error || read_argp->pvnr_resid) 1529 break; 1530 1531 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1532 } 1533 } 1534 1535 if (read_argp) 1536 free(read_argp, M_PUFFS); 1537 return error; 1538 } 1539 1540 int 1541 puffs_write(void *v) 1542 { 1543 struct vop_write_args /* { 1544 const struct vnodeop_desc *a_desc; 1545 struct vnode *a_vp; 1546 struct uio *a_uio; 1547 int a_ioflag; 1548 kauth_cred_t a_cred; 1549 }*/ *ap = v; 1550 struct puffs_vnreq_write *write_argp; 1551 struct puffs_mount *pmp; 1552 struct uio *uio; 1553 struct vnode *vp; 1554 void *win; 1555 size_t tomove, argsize; 1556 off_t oldoff, newoff, origoff; 1557 vsize_t bytelen; 1558 int error, uflags; 1559 int ubcflags; 1560 1561 vp = ap->a_vp; 1562 uio = ap->a_uio; 1563 error = uflags = 0; 1564 write_argp = NULL; 1565 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1566 1567 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1568 ubcflags = 0; 1569 if (UBC_WANT_UNMAP(vp)) 1570 ubcflags = UBC_UNMAP; 1571 1572 /* 1573 * userspace *should* be allowed to control this, 1574 * but with UBC it's a bit unclear how to handle it 1575 */ 1576 if (ap->a_ioflag & IO_APPEND) 1577 uio->uio_offset = vp->v_size; 1578 1579 origoff = uio->uio_offset; 1580 while (uio->uio_resid > 0) { 1581 uflags |= PUFFS_UPDATECTIME; 1582 uflags |= PUFFS_UPDATEMTIME; 1583 oldoff = uio->uio_offset; 1584 bytelen = uio->uio_resid; 1585 1586 win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, 1587 UVM_ADV_NORMAL, UBC_WRITE); 1588 error = uiomove(win, bytelen, uio); 1589 1590 /* 1591 * There is no guarantee that the faults 1592 * generated by uiomove() succeed at all. 1593 * Therefore, in case of an uiomove() error, 1594 * opt to not extend the file at all and 1595 * return an error. Otherwise, if we attempt 1596 * to clear the memory we couldn't fault to, 1597 * we might generate a kernel page fault. 1598 */ 1599 newoff = oldoff + bytelen; 1600 if (vp->v_size < newoff && error == 0) { 1601 uflags |= PUFFS_UPDATESIZE; 1602 uvm_vnp_setsize(vp, newoff); 1603 } 1604 1605 ubc_release(win, ubcflags); 1606 if (error) 1607 break; 1608 1609 /* 1610 * If we're writing large files, flush to file server 1611 * every 64k. Otherwise we can very easily exhaust 1612 * kernel and user memory, as the file server cannot 1613 * really keep up with our writing speed. 1614 * 1615 * Note: this does *NOT* honor MNT_ASYNC, because 1616 * that gives userland too much say in the kernel. 1617 */ 1618 if (oldoff >> 16 != uio->uio_offset >> 16) { 1619 simple_lock(&vp->v_interlock); 1620 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1621 uio->uio_offset & ~0xffff, 1622 PGO_CLEANIT | PGO_SYNCIO); 1623 if (error) 1624 break; 1625 } 1626 } 1627 1628 /* synchronous I/O? */ 1629 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1630 simple_lock(&vp->v_interlock); 1631 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1632 round_page(uio->uio_offset), 1633 PGO_CLEANIT | PGO_SYNCIO); 1634 1635 /* write though page cache? */ 1636 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1637 simple_lock(&vp->v_interlock); 1638 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1639 round_page(uio->uio_offset), PGO_CLEANIT); 1640 } 1641 1642 puffs_updatenode(vp, uflags); 1643 } else { 1644 /* tomove is non-increasing */ 1645 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1646 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1647 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1648 1649 while (uio->uio_resid > 0) { 1650 write_argp->pvnr_ioflag = ap->a_ioflag; 1651 write_argp->pvnr_resid = tomove; 1652 write_argp->pvnr_offset = uio->uio_offset; 1653 puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred); 1654 error = uiomove(write_argp->pvnr_data, tomove, uio); 1655 if (error) 1656 break; 1657 1658 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1659 PUFFS_VN_WRITE, write_argp, argsize, 0, 1660 ap->a_vp, NULL); 1661 if (error) { 1662 /* restore uiomove */ 1663 uio->uio_resid += tomove; 1664 uio->uio_offset -= tomove; 1665 break; 1666 } 1667 if (write_argp->pvnr_resid > tomove) { 1668 /* 1669 * XXX: correct file size is a mystery, 1670 * we can only guess 1671 */ 1672 error = EINVAL; 1673 break; 1674 } 1675 1676 /* adjust file size */ 1677 if (vp->v_size < uio->uio_offset) 1678 uvm_vnp_setsize(vp, uio->uio_offset); 1679 1680 /* didn't move everything? bad userspace. bail */ 1681 if (write_argp->pvnr_resid != 0) { 1682 uio->uio_resid += write_argp->pvnr_resid; 1683 uio->uio_offset -= write_argp->pvnr_resid; 1684 error = EIO; 1685 break; 1686 } 1687 1688 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1689 } 1690 } 1691 1692 if (write_argp) 1693 free(write_argp, M_PUFFS); 1694 return error; 1695 } 1696 1697 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1698 1699 #define FCNIOCTL_ARG_MAX 1<<16 1700 int 1701 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1702 { 1703 1704 /* currently not supported */ 1705 return EOPNOTSUPP; 1706 #if 0 1707 /* struct vop_ioctl_args { 1708 const struct vnodeop_desc *a_desc; 1709 struct vnode *a_vp; 1710 u_long a_command; 1711 void *a_data; 1712 int a_fflag; 1713 kauth_cred_t a_cred; 1714 struct lwp *a_l; 1715 }*ap = v; */ 1716 struct puffs_mount *pmp; 1717 struct puffs_sizepark pspark; 1718 void *kernbuf; 1719 size_t copylen; 1720 int error; 1721 1722 PUFFS_VNREQ(fcnioctl); 1723 1724 /* 1725 * Since this op gives the filesystem (almost) complete control on 1726 * how much it is allowed to copy from the calling process 1727 * address space, do not enable it by default, since it would 1728 * be a whopping security hole. 1729 */ 1730 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1731 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1732 return EINVAL; /* only shoe that fits */ 1733 1734 /* fill in sizereq and store it */ 1735 pspark.pkso_reqid = puffs_getreqid(pmp); 1736 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1737 pspark.pkso_copybuf = ap->a_data; 1738 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1739 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1740 1741 /* then fill in actual request and shoot it off */ 1742 fcnioctl_arg.pvnr_command = ap->a_command; 1743 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1744 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1745 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1746 1747 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1748 &fcnioctl_arg, sizeof(fcnioctl_arg), 0, ap->a_vp, 1749 pspark.pkso_reqid, ap->a_vp, NULL); 1750 1751 /* if we don't need to copy data, we're done */ 1752 if (error || !fcnioctl_arg.pvnr_copyback) 1753 return error; 1754 1755 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1756 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1757 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1758 if (error) 1759 goto out; 1760 error = copyout(kernbuf, ap->a_data, copylen); 1761 1762 out: 1763 free(kernbuf, M_PUFFS); 1764 return error; 1765 #endif 1766 } 1767 1768 int 1769 puffs_ioctl(void *v) 1770 { 1771 1772 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1773 } 1774 1775 int 1776 puffs_fcntl(void *v) 1777 { 1778 1779 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1780 } 1781 1782 int 1783 puffs_print(void *v) 1784 { 1785 struct vop_print_args /* { 1786 struct vnode *a_vp; 1787 } */ *ap = v; 1788 struct puffs_mount *pmp; 1789 struct vnode *vp = ap->a_vp; 1790 struct puffs_node *pn = vp->v_data; 1791 1792 PUFFS_VNREQ(print); 1793 1794 pmp = MPTOPUFFSMP(vp->v_mount); 1795 1796 /* kernel portion */ 1797 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1798 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1799 if (vp->v_type == VFIFO) 1800 fifo_printinfo(vp); 1801 lockmgr_printinfo(&vp->v_lock); 1802 1803 /* userspace portion */ 1804 if (EXISTSOP(pmp, PRINT)) 1805 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1806 &print_arg, sizeof(print_arg), 0, ap->a_vp, NULL); 1807 1808 return 0; 1809 } 1810 1811 int 1812 puffs_pathconf(void *v) 1813 { 1814 struct vop_pathconf_args /* { 1815 const struct vnodeop_desc *a_desc; 1816 struct vnode *a_vp; 1817 int a_name; 1818 register_t *a_retval; 1819 } */ *ap = v; 1820 int error; 1821 1822 PUFFS_VNREQ(pathconf); 1823 1824 pathconf_arg.pvnr_name = ap->a_name; 1825 1826 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1827 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 0, 1828 ap->a_vp, NULL); 1829 if (error) 1830 return error; 1831 1832 *ap->a_retval = pathconf_arg.pvnr_retval; 1833 1834 return 0; 1835 } 1836 1837 int 1838 puffs_advlock(void *v) 1839 { 1840 struct vop_advlock_args /* { 1841 const struct vnodeop_desc *a_desc; 1842 struct vnode *a_vp; 1843 void *a_id; 1844 int a_op; 1845 struct flock *a_fl; 1846 int a_flags; 1847 } */ *ap = v; 1848 int error; 1849 1850 PUFFS_VNREQ(advlock); 1851 1852 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1853 if (error) 1854 return error; 1855 advlock_arg.pvnr_id = ap->a_id; 1856 advlock_arg.pvnr_op = ap->a_op; 1857 advlock_arg.pvnr_flags = ap->a_flags; 1858 1859 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1860 &advlock_arg, sizeof(advlock_arg), 0, ap->a_vp, NULL); 1861 } 1862 /* 1863 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1864 */ 1865 int 1866 puffs_strategy(void *v) 1867 { 1868 struct vop_strategy_args /* { 1869 const struct vnodeop_desc *a_desc; 1870 struct vnode *a_vp; 1871 struct buf *a_bp; 1872 } */ *ap = v; 1873 struct puffs_mount *pmp; 1874 struct vnode *vp = ap->a_vp; 1875 struct puffs_node *pn; 1876 struct puffs_vnreq_read *read_argp = NULL; 1877 struct puffs_vnreq_write *write_argp = NULL; 1878 struct buf *bp; 1879 size_t argsize; 1880 size_t tomove, moved; 1881 int error, dowritefaf; 1882 1883 pmp = MPTOPUFFSMP(vp->v_mount); 1884 bp = ap->a_bp; 1885 error = 0; 1886 dowritefaf = 0; 1887 pn = VPTOPP(vp); 1888 1889 if (((bp->b_flags & B_READ) && !EXISTSOP(pmp, READ)) 1890 || (((bp->b_flags & B_READ) == 0) && !EXISTSOP(pmp, WRITE))) { 1891 error = EOPNOTSUPP; 1892 goto out; 1893 } 1894 1895 /* 1896 * Short-circuit optimization: don't flush buffer in between 1897 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 1898 */ 1899 if (pn->pn_stat & PNODE_NOREFS) { 1900 bp->b_resid = 0; 1901 goto out; 1902 } 1903 1904 #ifdef DIAGNOSTIC 1905 if (bp->b_bcount > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1906 panic("puffs_strategy: wildly inappropriate buf bcount %d", 1907 bp->b_bcount); 1908 #endif 1909 1910 /* 1911 * See explanation for the necessity of a FAF in puffs_fsync. 1912 * 1913 * Also, do FAF in case we're suspending. 1914 * See puffs_vfsops.c:pageflush() 1915 * 1916 * XXgoddamnX: B_WRITE is a "pseudo flag" 1917 */ 1918 if ((bp->b_flags & B_READ) == 0) { 1919 simple_lock(&vp->v_interlock); 1920 if (vp->v_flag & VXLOCK) 1921 dowritefaf = 1; 1922 if (pn->pn_stat & PNODE_SUSPEND) 1923 dowritefaf = 1; 1924 simple_unlock(&vp->v_interlock); 1925 } 1926 1927 if (bp->b_flags & B_ASYNC) 1928 dowritefaf = 1; 1929 1930 #ifdef DIAGNOSTIC 1931 if (curproc == uvm.pagedaemon_proc) 1932 KASSERT(dowritefaf); 1933 #endif 1934 1935 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 1936 1937 if ((bp->b_flags & (B_READ | B_ASYNC)) == (B_READ | B_ASYNC)) { 1938 argsize = sizeof(struct puffs_vnreq_read); 1939 read_argp = malloc(argsize + tomove, 1940 M_PUFFS, M_NOWAIT | M_ZERO); 1941 if (read_argp == NULL) { 1942 error = ENOMEM; 1943 goto out; 1944 } 1945 1946 read_argp->pvnr_ioflag = 0; 1947 read_argp->pvnr_resid = tomove; 1948 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1949 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1950 1951 puffs_vntouser_call(pmp, PUFFS_VN_READ, read_argp, 1952 argsize, tomove, puffs_parkdone_asyncbioread, bp, vp, NULL); 1953 error = 0; 1954 goto wayout; 1955 } else if (bp->b_flags & B_READ) { 1956 argsize = sizeof(struct puffs_vnreq_read); 1957 read_argp = malloc(argsize + tomove, 1958 M_PUFFS, M_WAITOK | M_ZERO); 1959 1960 read_argp->pvnr_ioflag = 0; 1961 read_argp->pvnr_resid = tomove; 1962 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1963 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1964 1965 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1966 read_argp, argsize, tomove, vp, NULL); 1967 1968 if (error) 1969 goto out; 1970 1971 if (read_argp->pvnr_resid > tomove) { 1972 error = EINVAL; 1973 goto out; 1974 } 1975 1976 moved = tomove - read_argp->pvnr_resid; 1977 1978 (void)memcpy(bp->b_data, read_argp->pvnr_data, moved); 1979 bp->b_resid = bp->b_bcount - moved; 1980 } else { 1981 /* 1982 * make pages read-only before we write them if we want 1983 * write caching info 1984 */ 1985 if (PUFFS_WCACHEINFO(pmp)) { 1986 struct uvm_object *uobj = &vp->v_uobj; 1987 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 1988 struct vm_page *vmp; 1989 int i; 1990 1991 for (i = 0; i < npages; i++) { 1992 vmp= uvm_pageratop((vaddr_t)bp->b_data 1993 + (i << PAGE_SHIFT)); 1994 DPRINTF(("puffs_strategy: write-protecting " 1995 "vp %p page %p, offset %" PRId64"\n", 1996 vp, vmp, vmp->offset)); 1997 simple_lock(&uobj->vmobjlock); 1998 vmp->flags |= PG_RDONLY; 1999 pmap_page_protect(vmp, VM_PROT_READ); 2000 simple_unlock(&uobj->vmobjlock); 2001 } 2002 } 2003 2004 argsize = sizeof(struct puffs_vnreq_write) + bp->b_bcount; 2005 write_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 2006 if (write_argp == NULL) { 2007 error = ENOMEM; 2008 goto out; 2009 } 2010 2011 write_argp->pvnr_ioflag = 0; 2012 write_argp->pvnr_resid = tomove; 2013 write_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 2014 puffs_credcvt(&write_argp->pvnr_cred, FSCRED); 2015 2016 (void)memcpy(&write_argp->pvnr_data, bp->b_data, tomove); 2017 2018 if (dowritefaf) { 2019 /* 2020 * assume FAF moves everything. frankly, we don't 2021 * really have a choice. 2022 */ 2023 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 2024 PUFFS_VN_WRITE, write_argp, argsize, vp); 2025 bp->b_resid = bp->b_bcount - tomove; 2026 } else { 2027 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 2028 PUFFS_VN_WRITE, write_argp, argsize, 0, vp, NULL); 2029 if (error) 2030 goto out; 2031 2032 moved = tomove - write_argp->pvnr_resid; 2033 if (write_argp->pvnr_resid > tomove) { 2034 error = EINVAL; 2035 goto out; 2036 } 2037 2038 bp->b_resid = bp->b_bcount - moved; 2039 if (write_argp->pvnr_resid != 0) 2040 error = EIO; 2041 } 2042 } 2043 2044 out: 2045 if (read_argp) 2046 free(read_argp, M_PUFFS); 2047 if (write_argp && !dowritefaf) 2048 free(write_argp, M_PUFFS); 2049 2050 if (error) { 2051 bp->b_error = error; 2052 bp->b_flags |= B_ERROR; 2053 } 2054 2055 if (error || ((bp->b_flags & (B_READ | B_ASYNC)) != (B_READ | B_ASYNC))) 2056 biodone(bp); 2057 wayout: 2058 return error; 2059 } 2060 2061 int 2062 puffs_mmap(void *v) 2063 { 2064 struct vop_mmap_args /* { 2065 const struct vnodeop_desc *a_desc; 2066 struct vnode *a_vp; 2067 int a_fflags; 2068 kauth_cred_t a_cred; 2069 struct lwp *a_l; 2070 } */ *ap = v; 2071 struct puffs_mount *pmp; 2072 int error; 2073 2074 PUFFS_VNREQ(mmap); 2075 2076 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2077 2078 if (!PUFFS_DOCACHE(pmp)) 2079 return genfs_eopnotsupp(v); 2080 2081 if (EXISTSOP(pmp, MMAP)) { 2082 mmap_arg.pvnr_fflags = ap->a_fflags; 2083 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 2084 mmap_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 2085 2086 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 2087 &mmap_arg, sizeof(mmap_arg), 0, 2088 ap->a_vp, NULL); 2089 } else { 2090 error = genfs_mmap(v); 2091 } 2092 2093 return error; 2094 } 2095 2096 2097 /* 2098 * The rest don't get a free trip to userspace and back, they 2099 * have to stay within the kernel. 2100 */ 2101 2102 /* 2103 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2104 * well, maybe somehow, somewhere, some day .... 2105 */ 2106 int 2107 puffs_bmap(void *v) 2108 { 2109 struct vop_bmap_args /* { 2110 const struct vnodeop_desc *a_desc; 2111 struct vnode *a_vp; 2112 daddr_t a_bn; 2113 struct vnode **a_vpp; 2114 daddr_t *a_bnp; 2115 int *a_runp; 2116 } */ *ap = v; 2117 struct puffs_mount *pmp; 2118 2119 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2120 2121 if (ap->a_vpp) 2122 *ap->a_vpp = ap->a_vp; 2123 if (ap->a_bnp) 2124 *ap->a_bnp = ap->a_bn; 2125 if (ap->a_runp) 2126 *ap->a_runp 2127 = (PUFFS_TOMOVE(pmp->pmp_req_maxsize, pmp)>>DEV_BSHIFT) - 1; 2128 2129 return 0; 2130 } 2131 2132 /* 2133 * Handle getpages faults in puffs. We let genfs_getpages() do most 2134 * of the dirty work, but we come in this route to do accounting tasks. 2135 * If the user server has specified functions for cache notifications 2136 * about reads and/or writes, we record which type of operation we got, 2137 * for which page range, and proceed to issue a FAF notification to the 2138 * server about it. 2139 */ 2140 int 2141 puffs_getpages(void *v) 2142 { 2143 struct vop_getpages_args /* { 2144 const struct vnodeop_desc *a_desc; 2145 struct vnode *a_vp; 2146 voff_t a_offset; 2147 struct vm_page **a_m; 2148 int *a_count; 2149 int a_centeridx; 2150 vm_prot_t a_access_type; 2151 int a_advice; 2152 int a_flags; 2153 } */ *ap = v; 2154 struct puffs_mount *pmp; 2155 struct vnode *vp; 2156 struct vm_page **pgs; 2157 struct puffs_cacheinfo *pcinfo = NULL; 2158 struct puffs_cacherun *pcrun; 2159 void *parkmem = NULL; 2160 size_t runsizes; 2161 int i, npages, si, streakon; 2162 int error, locked, write; 2163 2164 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2165 npages = *ap->a_count; 2166 pgs = ap->a_m; 2167 vp = ap->a_vp; 2168 locked = (ap->a_flags & PGO_LOCKED) != 0; 2169 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2170 2171 /* ccg xnaht - gets Wuninitialized wrong */ 2172 pcrun = NULL; 2173 runsizes = 0; 2174 2175 if (write && PUFFS_WCACHEINFO(pmp)) { 2176 /* allocate worst-case memory */ 2177 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2178 pcinfo = malloc(sizeof(struct puffs_cacheinfo) + runsizes, 2179 M_PUFFS, M_ZERO | locked ? M_NOWAIT : M_WAITOK); 2180 2181 /* 2182 * can't block if we're locked and can't mess up caching 2183 * information for fs server. so come back later, please 2184 */ 2185 if (pcinfo == NULL) { 2186 error = ENOMEM; 2187 goto out; 2188 } 2189 2190 parkmem = puffs_park_alloc(locked == 0); 2191 if (parkmem == NULL) { 2192 error = ENOMEM; 2193 goto out; 2194 } 2195 2196 pcrun = pcinfo->pcache_runs; 2197 } 2198 2199 error = genfs_getpages(v); 2200 if (error) 2201 goto out; 2202 2203 if (PUFFS_WCACHEINFO(pmp) == 0) 2204 goto out; 2205 2206 /* 2207 * Let's see whose fault it was and inform the user server of 2208 * possibly read/written pages. Map pages from read faults 2209 * strictly read-only, since otherwise we might miss info on 2210 * when the page is actually write-faulted to. 2211 */ 2212 if (!locked) 2213 simple_lock(&vp->v_uobj.vmobjlock); 2214 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2215 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2216 if (streakon && write) { 2217 streakon = 0; 2218 pcrun[si].pcache_runend 2219 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2220 si++; 2221 } 2222 continue; 2223 } 2224 if (streakon == 0 && write) { 2225 streakon = 1; 2226 pcrun[si].pcache_runstart = pgs[i]->offset; 2227 } 2228 2229 if (!write) 2230 pgs[i]->flags |= PG_RDONLY; 2231 } 2232 /* was the last page part of our streak? */ 2233 if (streakon) { 2234 pcrun[si].pcache_runend 2235 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2236 si++; 2237 } 2238 if (!locked) 2239 simple_unlock(&vp->v_uobj.vmobjlock); 2240 2241 KASSERT(si <= (npages / 2) + 1); 2242 2243 /* send results to userspace */ 2244 if (write) 2245 puffs_cacheop(pmp, parkmem, pcinfo, 2246 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2247 2248 out: 2249 if (error) { 2250 if (pcinfo != NULL) 2251 free(pcinfo, M_PUFFS); 2252 if (parkmem != NULL) 2253 puffs_park_release(parkmem, 1); 2254 } 2255 2256 return error; 2257 } 2258 2259 int 2260 puffs_lock(void *v) 2261 { 2262 struct vop_lock_args /* { 2263 struct vnode *a_vp; 2264 int a_flags; 2265 }*/ *ap = v; 2266 struct vnode *vp = ap->a_vp; 2267 struct mount *mp = vp->v_mount; 2268 2269 #if 0 2270 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2271 #endif 2272 2273 /* 2274 * XXX: this avoids deadlocking when we're suspending. 2275 * e.g. some ops holding the vnode lock might be blocked for 2276 * the vfs transaction lock so we'd deadlock. 2277 * 2278 * Now once again this is skating on the thin ice of modern life, 2279 * since we are breaking the consistency guarantee provided 2280 * _to the user server_ by vnode locking. Hopefully this will 2281 * get fixed soon enough by getting rid of the dependency on 2282 * vnode locks alltogether. 2283 */ 2284 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2285 if (ap->a_flags & LK_INTERLOCK) 2286 simple_unlock(&vp->v_interlock); 2287 return 0; 2288 } 2289 2290 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2291 } 2292 2293 int 2294 puffs_unlock(void *v) 2295 { 2296 struct vop_unlock_args /* { 2297 struct vnode *a_vp; 2298 int a_flags; 2299 } */ *ap = v; 2300 struct vnode *vp = ap->a_vp; 2301 struct mount *mp = vp->v_mount; 2302 2303 #if 0 2304 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2305 #endif 2306 2307 /* XXX: see puffs_lock() */ 2308 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2309 if (ap->a_flags & LK_INTERLOCK) 2310 simple_unlock(&vp->v_interlock); 2311 return 0; 2312 } 2313 2314 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2315 } 2316 2317 int 2318 puffs_islocked(void *v) 2319 { 2320 struct vop_islocked_args *ap = v; 2321 int rv; 2322 2323 rv = lockstatus(&ap->a_vp->v_lock); 2324 return rv; 2325 } 2326 2327 int 2328 puffs_generic(void *v) 2329 { 2330 struct vop_generic_args *ap = v; 2331 2332 (void)ap; 2333 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2334 2335 return EOPNOTSUPP; 2336 } 2337 2338 2339 /* 2340 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2341 * FAF update information for the puffs node first. 2342 */ 2343 int 2344 puffs_spec_read(void *v) 2345 { 2346 struct vop_read_args /* { 2347 const struct vnodeop_desc *a_desc; 2348 struct vnode *a_vp; 2349 struct uio *a_uio; 2350 int a_ioflag; 2351 kauth_cred_t a_cred; 2352 } */ *ap = v; 2353 2354 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2355 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2356 } 2357 2358 int 2359 puffs_spec_write(void *v) 2360 { 2361 struct vop_write_args /* { 2362 const struct vnodeop_desc *a_desc; 2363 struct vnode *a_vp; 2364 struct uio *a_uio; 2365 int a_ioflag; 2366 kauth_cred_t a_cred; 2367 }*/ *ap = v; 2368 2369 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2370 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2371 } 2372 2373 int 2374 puffs_fifo_read(void *v) 2375 { 2376 struct vop_read_args /* { 2377 const struct vnodeop_desc *a_desc; 2378 struct vnode *a_vp; 2379 struct uio *a_uio; 2380 int a_ioflag; 2381 kauth_cred_t a_cred; 2382 } */ *ap = v; 2383 2384 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2385 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2386 } 2387 2388 int 2389 puffs_fifo_write(void *v) 2390 { 2391 struct vop_write_args /* { 2392 const struct vnodeop_desc *a_desc; 2393 struct vnode *a_vp; 2394 struct uio *a_uio; 2395 int a_ioflag; 2396 kauth_cred_t a_cred; 2397 }*/ *ap = v; 2398 2399 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2400 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2401 } 2402
Indexes created Tue Sep 30 11:09:46 GMT 2025