puffs_vnops.c revision 1.74
1 /* $NetBSD: puffs_vnops.c,v 1.74 2007/06/05 12:31:30 yamt 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 1.74 2007/06/05 12:31:30 yamt 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 || (pnode->pn_stat & PNODE_NOREFS)) { 859 pnode->pn_stat |= PNODE_DYING; 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 && (pn->pn_stat & PNODE_DYING) == 0) { 1090 vattr_null(&va); 1091 error = VOP_SETATTR(vp, &va, FSCRED, NULL); 1092 if (error) 1093 return error; 1094 } 1095 1096 /* 1097 * flush pages to avoid being overly dirty 1098 */ 1099 pflags = PGO_CLEANIT; 1100 if (ap->a_flags & FSYNC_WAIT) 1101 pflags |= PGO_SYNCIO; 1102 simple_lock(&vp->v_interlock); 1103 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1104 round_page(ap->a_offhi), pflags); 1105 if (error) 1106 return error; 1107 1108 /* 1109 * HELLO! We exit already here if the user server does not 1110 * support fsync OR if we should call fsync for a node which 1111 * has references neither in the kernel or the fs server. 1112 * Otherwise we continue to issue fsync() forward. 1113 */ 1114 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1115 return 0; 1116 1117 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1118 /* 1119 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1120 * only FAFs for those. Otherwise there's a danger of deadlock, 1121 * since the execution context here might be the user server 1122 * doing some operation on another fs, which in turn caused a 1123 * vnode to be reclaimed from the freelist for this fs. 1124 */ 1125 if (dofaf == 0) { 1126 simple_lock(&vp->v_interlock); 1127 if (vp->v_flag & VXLOCK) 1128 dofaf = 1; 1129 simple_unlock(&vp->v_interlock); 1130 } 1131 1132 if (dofaf == 0) { 1133 fsync_argp = &fsync_arg; 1134 } else { 1135 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 1136 M_PUFFS, M_ZERO | M_NOWAIT); 1137 if (fsync_argp == NULL) 1138 return ENOMEM; 1139 } 1140 1141 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 1142 fsync_argp->pvnr_flags = ap->a_flags; 1143 fsync_argp->pvnr_offlo = ap->a_offlo; 1144 fsync_argp->pvnr_offhi = ap->a_offhi; 1145 fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 1146 1147 /* 1148 * XXX: see comment at puffs_getattr about locking 1149 * 1150 * If we are not required to wait, do a FAF operation. 1151 * Otherwise block here. 1152 */ 1153 if (dofaf == 0) { 1154 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1155 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 0, 1156 vp, NULL); 1157 } else { 1158 /* FAF is always "succesful" */ 1159 error = 0; 1160 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1161 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), vp); 1162 } 1163 1164 return error; 1165 } 1166 1167 int 1168 puffs_seek(void *v) 1169 { 1170 struct vop_seek_args /* { 1171 const struct vnodeop_desc *a_desc; 1172 struct vnode *a_vp; 1173 off_t a_oldoff; 1174 off_t a_newoff; 1175 kauth_cred_t a_cred; 1176 } */ *ap = v; 1177 1178 PUFFS_VNREQ(seek); 1179 1180 seek_arg.pvnr_oldoff = ap->a_oldoff; 1181 seek_arg.pvnr_newoff = ap->a_newoff; 1182 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1183 1184 /* 1185 * XXX: seems like seek is called with an unlocked vp, but 1186 * it can't hurt to play safe 1187 */ 1188 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1189 &seek_arg, sizeof(seek_arg), 0, ap->a_vp, NULL); 1190 } 1191 1192 int 1193 puffs_remove(void *v) 1194 { 1195 struct vop_remove_args /* { 1196 const struct vnodeop_desc *a_desc; 1197 struct vnode *a_dvp; 1198 struct vnode *a_vp; 1199 struct componentname *a_cnp; 1200 } */ *ap = v; 1201 int error; 1202 1203 PUFFS_VNREQ(remove); 1204 1205 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1206 puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp); 1207 1208 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE, 1209 &remove_arg, sizeof(remove_arg), 0, ap->a_dvp, ap->a_vp); 1210 1211 vput(ap->a_vp); 1212 if (ap->a_dvp == ap->a_vp) 1213 vrele(ap->a_dvp); 1214 else 1215 vput(ap->a_dvp); 1216 1217 return error; 1218 } 1219 1220 int 1221 puffs_mkdir(void *v) 1222 { 1223 struct vop_mkdir_args /* { 1224 const struct vnodeop_desc *a_desc; 1225 struct vnode *a_dvp; 1226 struct vnode **a_vpp; 1227 struct componentname *a_cnp; 1228 struct vattr *a_vap; 1229 } */ *ap = v; 1230 int error; 1231 1232 PUFFS_VNREQ(mkdir); 1233 1234 puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp); 1235 mkdir_arg.pvnr_va = *ap->a_vap; 1236 1237 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR, 1238 &mkdir_arg, sizeof(mkdir_arg), 0, ap->a_dvp, NULL); 1239 if (error) 1240 goto out; 1241 1242 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1243 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1244 1245 out: 1246 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1247 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1248 vput(ap->a_dvp); 1249 return error; 1250 } 1251 1252 int 1253 puffs_rmdir(void *v) 1254 { 1255 struct vop_rmdir_args /* { 1256 const struct vnodeop_desc *a_desc; 1257 struct vnode *a_dvp; 1258 struct vnode *a_vp; 1259 struct componentname *a_cnp; 1260 } */ *ap = v; 1261 int error; 1262 1263 PUFFS_VNREQ(rmdir); 1264 1265 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1266 puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp); 1267 1268 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR, 1269 &rmdir_arg, sizeof(rmdir_arg), 0, ap->a_dvp, ap->a_vp); 1270 1271 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1272 1273 vput(ap->a_dvp); 1274 vput(ap->a_vp); 1275 1276 return error; 1277 } 1278 1279 int 1280 puffs_link(void *v) 1281 { 1282 struct vop_link_args /* { 1283 const struct vnodeop_desc *a_desc; 1284 struct vnode *a_dvp; 1285 struct vnode *a_vp; 1286 struct componentname *a_cnp; 1287 }*/ *ap = v; 1288 int error; 1289 1290 PUFFS_VNREQ(link); 1291 1292 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1293 puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp); 1294 1295 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK, 1296 &link_arg, sizeof(link_arg), 0, ap->a_dvp, ap->a_vp); 1297 1298 /* 1299 * XXX: stay in touch with the cache. I don't like this, but 1300 * don't have a better solution either. See also puffs_rename(). 1301 */ 1302 if (error == 0) 1303 puffs_updatenode(ap->a_vp, PUFFS_UPDATECTIME); 1304 1305 vput(ap->a_dvp); 1306 1307 return error; 1308 } 1309 1310 int 1311 puffs_symlink(void *v) 1312 { 1313 struct vop_symlink_args /* { 1314 const struct vnodeop_desc *a_desc; 1315 struct vnode *a_dvp; 1316 struct vnode **a_vpp; 1317 struct componentname *a_cnp; 1318 struct vattr *a_vap; 1319 char *a_target; 1320 }*/ *ap = v; 1321 int error; 1322 1323 PUFFS_VNREQ(symlink); /* XXX: large structure */ 1324 1325 *ap->a_vpp = NULL; 1326 1327 puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp); 1328 symlink_arg.pvnr_va = *ap->a_vap; 1329 (void)strlcpy(symlink_arg.pvnr_link, ap->a_target, 1330 sizeof(symlink_arg.pvnr_link)); 1331 1332 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), 1333 PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg), 0, 1334 ap->a_dvp, NULL); 1335 if (error) 1336 goto out; 1337 1338 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1339 symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0); 1340 1341 out: 1342 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1343 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1344 vput(ap->a_dvp); 1345 return error; 1346 } 1347 1348 int 1349 puffs_readlink(void *v) 1350 { 1351 struct vop_readlink_args /* { 1352 const struct vnodeop_desc *a_desc; 1353 struct vnode *a_vp; 1354 struct uio *a_uio; 1355 kauth_cred_t a_cred; 1356 } */ *ap = v; 1357 size_t linklen; 1358 int error; 1359 1360 PUFFS_VNREQ(readlink); 1361 1362 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1363 linklen = sizeof(readlink_arg.pvnr_link); 1364 readlink_arg.pvnr_linklen = linklen; 1365 1366 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1367 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 0, 1368 ap->a_vp, NULL); 1369 if (error) 1370 return error; 1371 1372 /* bad bad user file server */ 1373 if (readlink_arg.pvnr_linklen > linklen) 1374 return EINVAL; 1375 1376 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1377 ap->a_uio); 1378 } 1379 1380 /* XXXXXXX: think about locking & userspace op delocking... */ 1381 int 1382 puffs_rename(void *v) 1383 { 1384 struct vop_rename_args /* { 1385 const struct vnodeop_desc *a_desc; 1386 struct vnode *a_fdvp; 1387 struct vnode *a_fvp; 1388 struct componentname *a_fcnp; 1389 struct vnode *a_tdvp; 1390 struct vnode *a_tvp; 1391 struct componentname *a_tcnp; 1392 }*/ *ap = v; 1393 int error; 1394 1395 PUFFS_VNREQ(rename); 1396 1397 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) { 1398 error = EXDEV; 1399 goto out; 1400 } 1401 1402 rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1403 rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1404 if (ap->a_tvp) 1405 rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1406 else 1407 rename_arg.pvnr_cookie_targ = NULL; 1408 puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp); 1409 puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp); 1410 1411 error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount), 1412 PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg), 0, 1413 ap->a_fdvp, NULL); /* XXX */ 1414 1415 /* 1416 * XXX: stay in touch with the cache. I don't like this, but 1417 * don't have a better solution either. See also puffs_link(). 1418 */ 1419 if (error == 0) 1420 puffs_updatenode(ap->a_fvp, PUFFS_UPDATECTIME); 1421 1422 out: 1423 if (ap->a_tvp != NULL) 1424 vput(ap->a_tvp); 1425 if (ap->a_tdvp == ap->a_tvp) 1426 vrele(ap->a_tdvp); 1427 else 1428 vput(ap->a_tdvp); 1429 1430 vrele(ap->a_fdvp); 1431 vrele(ap->a_fvp); 1432 1433 return error; 1434 } 1435 1436 int 1437 puffs_read(void *v) 1438 { 1439 struct vop_read_args /* { 1440 const struct vnodeop_desc *a_desc; 1441 struct vnode *a_vp; 1442 struct uio *a_uio; 1443 int a_ioflag; 1444 kauth_cred_t a_cred; 1445 } */ *ap = v; 1446 struct puffs_vnreq_read *read_argp; 1447 struct puffs_mount *pmp; 1448 struct vnode *vp; 1449 struct uio *uio; 1450 void *win; 1451 size_t tomove, argsize; 1452 vsize_t bytelen; 1453 int error, ubcflags; 1454 1455 uio = ap->a_uio; 1456 vp = ap->a_vp; 1457 read_argp = NULL; 1458 error = 0; 1459 pmp = MPTOPUFFSMP(vp->v_mount); 1460 1461 /* std sanity */ 1462 if (uio->uio_resid == 0) 1463 return 0; 1464 if (uio->uio_offset < 0) 1465 return EINVAL; 1466 1467 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1468 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1469 1470 ubcflags = 0; 1471 if (UBC_WANT_UNMAP(vp)) 1472 ubcflags = UBC_UNMAP; 1473 1474 while (uio->uio_resid > 0) { 1475 bytelen = MIN(uio->uio_resid, 1476 vp->v_size - uio->uio_offset); 1477 if (bytelen == 0) 1478 break; 1479 1480 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1481 &bytelen, advice, UBC_READ); 1482 error = uiomove(win, bytelen, uio); 1483 ubc_release(win, ubcflags); 1484 if (error) 1485 break; 1486 } 1487 1488 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1489 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1490 } else { 1491 /* 1492 * in case it's not a regular file or we're operating 1493 * uncached, do read in the old-fashioned style, 1494 * i.e. explicit read operations 1495 */ 1496 1497 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1498 argsize = sizeof(struct puffs_vnreq_read); 1499 read_argp = malloc(argsize + tomove, 1500 M_PUFFS, M_WAITOK | M_ZERO); 1501 1502 error = 0; 1503 while (uio->uio_resid > 0) { 1504 read_argp->pvnr_ioflag = ap->a_ioflag; 1505 read_argp->pvnr_resid = tomove; 1506 read_argp->pvnr_offset = uio->uio_offset; 1507 puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred); 1508 1509 argsize = sizeof(struct puffs_vnreq_read); 1510 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1511 read_argp, argsize, tomove, 1512 ap->a_vp, NULL); 1513 if (error) 1514 break; 1515 1516 if (read_argp->pvnr_resid > tomove) { 1517 error = EINVAL; 1518 break; 1519 } 1520 1521 error = uiomove(read_argp->pvnr_data, 1522 tomove - read_argp->pvnr_resid, uio); 1523 1524 /* 1525 * in case the file is out of juice, resid from 1526 * userspace is != 0. and the error-case is 1527 * quite obvious 1528 */ 1529 if (error || read_argp->pvnr_resid) 1530 break; 1531 1532 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1533 } 1534 } 1535 1536 if (read_argp) 1537 free(read_argp, M_PUFFS); 1538 return error; 1539 } 1540 1541 int 1542 puffs_write(void *v) 1543 { 1544 struct vop_write_args /* { 1545 const struct vnodeop_desc *a_desc; 1546 struct vnode *a_vp; 1547 struct uio *a_uio; 1548 int a_ioflag; 1549 kauth_cred_t a_cred; 1550 } */ *ap = v; 1551 struct puffs_vnreq_write *write_argp; 1552 struct puffs_mount *pmp; 1553 struct uio *uio; 1554 struct vnode *vp; 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 = UBC_WRITE | UBC_PARTIALOK; 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 newoff = oldoff + bytelen; 1587 if (vp->v_size < newoff) { 1588 uvm_vnp_setwritesize(vp, newoff); 1589 } 1590 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1591 ubcflags); 1592 1593 /* 1594 * In case of a ubc_uiomove() error, 1595 * opt to not extend the file at all and 1596 * return an error. Otherwise, if we attempt 1597 * to clear the memory we couldn't fault to, 1598 * we might generate a kernel page fault. 1599 */ 1600 if (vp->v_size < newoff) { 1601 if (error == 0) { 1602 uflags |= PUFFS_UPDATESIZE; 1603 uvm_vnp_setsize(vp, newoff); 1604 } else { 1605 uvm_vnp_setwritesize(vp, vp->v_size); 1606 } 1607 } 1608 if (error) 1609 break; 1610 1611 /* 1612 * If we're writing large files, flush to file server 1613 * every 64k. Otherwise we can very easily exhaust 1614 * kernel and user memory, as the file server cannot 1615 * really keep up with our writing speed. 1616 * 1617 * Note: this does *NOT* honor MNT_ASYNC, because 1618 * that gives userland too much say in the kernel. 1619 */ 1620 if (oldoff >> 16 != uio->uio_offset >> 16) { 1621 simple_lock(&vp->v_interlock); 1622 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1623 uio->uio_offset & ~0xffff, 1624 PGO_CLEANIT | PGO_SYNCIO); 1625 if (error) 1626 break; 1627 } 1628 } 1629 1630 /* synchronous I/O? */ 1631 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1632 simple_lock(&vp->v_interlock); 1633 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1634 round_page(uio->uio_offset), 1635 PGO_CLEANIT | PGO_SYNCIO); 1636 1637 /* write though page cache? */ 1638 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1639 simple_lock(&vp->v_interlock); 1640 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1641 round_page(uio->uio_offset), PGO_CLEANIT); 1642 } 1643 1644 puffs_updatenode(vp, uflags); 1645 } else { 1646 /* tomove is non-increasing */ 1647 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1648 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1649 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1650 1651 while (uio->uio_resid > 0) { 1652 write_argp->pvnr_ioflag = ap->a_ioflag; 1653 write_argp->pvnr_resid = tomove; 1654 write_argp->pvnr_offset = uio->uio_offset; 1655 puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred); 1656 error = uiomove(write_argp->pvnr_data, tomove, uio); 1657 if (error) 1658 break; 1659 1660 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1661 PUFFS_VN_WRITE, write_argp, argsize, 0, 1662 ap->a_vp, NULL); 1663 if (error) { 1664 /* restore uiomove */ 1665 uio->uio_resid += tomove; 1666 uio->uio_offset -= tomove; 1667 break; 1668 } 1669 if (write_argp->pvnr_resid > tomove) { 1670 /* 1671 * XXX: correct file size is a mystery, 1672 * we can only guess 1673 */ 1674 error = EINVAL; 1675 break; 1676 } 1677 1678 /* adjust file size */ 1679 if (vp->v_size < uio->uio_offset) 1680 uvm_vnp_setsize(vp, uio->uio_offset); 1681 1682 /* didn't move everything? bad userspace. bail */ 1683 if (write_argp->pvnr_resid != 0) { 1684 uio->uio_resid += write_argp->pvnr_resid; 1685 uio->uio_offset -= write_argp->pvnr_resid; 1686 error = EIO; 1687 break; 1688 } 1689 1690 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1691 } 1692 } 1693 1694 if (write_argp) 1695 free(write_argp, M_PUFFS); 1696 return error; 1697 } 1698 1699 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1700 1701 #define FCNIOCTL_ARG_MAX 1<<16 1702 int 1703 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1704 { 1705 1706 /* currently not supported */ 1707 return EOPNOTSUPP; 1708 #if 0 1709 /* struct vop_ioctl_args { 1710 const struct vnodeop_desc *a_desc; 1711 struct vnode *a_vp; 1712 u_long a_command; 1713 void *a_data; 1714 int a_fflag; 1715 kauth_cred_t a_cred; 1716 struct lwp *a_l; 1717 }*ap = v; */ 1718 struct puffs_mount *pmp; 1719 struct puffs_sizepark pspark; 1720 void *kernbuf; 1721 size_t copylen; 1722 int error; 1723 1724 PUFFS_VNREQ(fcnioctl); 1725 1726 /* 1727 * Since this op gives the filesystem (almost) complete control on 1728 * how much it is allowed to copy from the calling process 1729 * address space, do not enable it by default, since it would 1730 * be a whopping security hole. 1731 */ 1732 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1733 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1734 return EINVAL; /* only shoe that fits */ 1735 1736 /* fill in sizereq and store it */ 1737 pspark.pkso_reqid = puffs_getreqid(pmp); 1738 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1739 pspark.pkso_copybuf = ap->a_data; 1740 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1741 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1742 1743 /* then fill in actual request and shoot it off */ 1744 fcnioctl_arg.pvnr_command = ap->a_command; 1745 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1746 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1747 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1748 1749 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1750 &fcnioctl_arg, sizeof(fcnioctl_arg), 0, ap->a_vp, 1751 pspark.pkso_reqid, ap->a_vp, NULL); 1752 1753 /* if we don't need to copy data, we're done */ 1754 if (error || !fcnioctl_arg.pvnr_copyback) 1755 return error; 1756 1757 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1758 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1759 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1760 if (error) 1761 goto out; 1762 error = copyout(kernbuf, ap->a_data, copylen); 1763 1764 out: 1765 free(kernbuf, M_PUFFS); 1766 return error; 1767 #endif 1768 } 1769 1770 int 1771 puffs_ioctl(void *v) 1772 { 1773 1774 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1775 } 1776 1777 int 1778 puffs_fcntl(void *v) 1779 { 1780 1781 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1782 } 1783 1784 int 1785 puffs_print(void *v) 1786 { 1787 struct vop_print_args /* { 1788 struct vnode *a_vp; 1789 } */ *ap = v; 1790 struct puffs_mount *pmp; 1791 struct vnode *vp = ap->a_vp; 1792 struct puffs_node *pn = vp->v_data; 1793 1794 PUFFS_VNREQ(print); 1795 1796 pmp = MPTOPUFFSMP(vp->v_mount); 1797 1798 /* kernel portion */ 1799 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1800 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1801 if (vp->v_type == VFIFO) 1802 fifo_printinfo(vp); 1803 lockmgr_printinfo(&vp->v_lock); 1804 1805 /* userspace portion */ 1806 if (EXISTSOP(pmp, PRINT)) 1807 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1808 &print_arg, sizeof(print_arg), 0, ap->a_vp, NULL); 1809 1810 return 0; 1811 } 1812 1813 int 1814 puffs_pathconf(void *v) 1815 { 1816 struct vop_pathconf_args /* { 1817 const struct vnodeop_desc *a_desc; 1818 struct vnode *a_vp; 1819 int a_name; 1820 register_t *a_retval; 1821 } */ *ap = v; 1822 int error; 1823 1824 PUFFS_VNREQ(pathconf); 1825 1826 pathconf_arg.pvnr_name = ap->a_name; 1827 1828 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1829 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 0, 1830 ap->a_vp, NULL); 1831 if (error) 1832 return error; 1833 1834 *ap->a_retval = pathconf_arg.pvnr_retval; 1835 1836 return 0; 1837 } 1838 1839 int 1840 puffs_advlock(void *v) 1841 { 1842 struct vop_advlock_args /* { 1843 const struct vnodeop_desc *a_desc; 1844 struct vnode *a_vp; 1845 void *a_id; 1846 int a_op; 1847 struct flock *a_fl; 1848 int a_flags; 1849 } */ *ap = v; 1850 int error; 1851 1852 PUFFS_VNREQ(advlock); 1853 1854 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1855 if (error) 1856 return error; 1857 advlock_arg.pvnr_id = ap->a_id; 1858 advlock_arg.pvnr_op = ap->a_op; 1859 advlock_arg.pvnr_flags = ap->a_flags; 1860 1861 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1862 &advlock_arg, sizeof(advlock_arg), 0, ap->a_vp, NULL); 1863 } 1864 /* 1865 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1866 */ 1867 int 1868 puffs_strategy(void *v) 1869 { 1870 struct vop_strategy_args /* { 1871 const struct vnodeop_desc *a_desc; 1872 struct vnode *a_vp; 1873 struct buf *a_bp; 1874 } */ *ap = v; 1875 struct puffs_mount *pmp; 1876 struct vnode *vp = ap->a_vp; 1877 struct puffs_node *pn; 1878 struct puffs_vnreq_read *read_argp = NULL; 1879 struct puffs_vnreq_write *write_argp = NULL; 1880 struct buf *bp; 1881 size_t argsize; 1882 size_t tomove, moved; 1883 int error, dowritefaf; 1884 1885 pmp = MPTOPUFFSMP(vp->v_mount); 1886 bp = ap->a_bp; 1887 error = 0; 1888 dowritefaf = 0; 1889 pn = VPTOPP(vp); 1890 1891 if (((bp->b_flags & B_READ) && !EXISTSOP(pmp, READ)) 1892 || (((bp->b_flags & B_READ) == 0) && !EXISTSOP(pmp, WRITE))) { 1893 error = EOPNOTSUPP; 1894 goto out; 1895 } 1896 1897 /* 1898 * Short-circuit optimization: don't flush buffer in between 1899 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 1900 */ 1901 if (pn->pn_stat & PNODE_DYING) { 1902 KASSERT((bp->b_flags & B_READ) == 0); 1903 bp->b_resid = 0; 1904 goto out; 1905 } 1906 1907 #ifdef DIAGNOSTIC 1908 if (bp->b_bcount > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1909 panic("puffs_strategy: wildly inappropriate buf bcount %d", 1910 bp->b_bcount); 1911 #endif 1912 1913 /* 1914 * See explanation for the necessity of a FAF in puffs_fsync. 1915 * 1916 * Also, do FAF in case we're suspending. 1917 * See puffs_vfsops.c:pageflush() 1918 * 1919 * XXgoddamnX: B_WRITE is a "pseudo flag" 1920 */ 1921 if ((bp->b_flags & B_READ) == 0) { 1922 simple_lock(&vp->v_interlock); 1923 if (vp->v_flag & VXLOCK) 1924 dowritefaf = 1; 1925 if (pn->pn_stat & PNODE_SUSPEND) 1926 dowritefaf = 1; 1927 simple_unlock(&vp->v_interlock); 1928 } 1929 1930 if (bp->b_flags & B_ASYNC) 1931 dowritefaf = 1; 1932 1933 #ifdef DIAGNOSTIC 1934 if (curproc == uvm.pagedaemon_proc) 1935 KASSERT(dowritefaf); 1936 #endif 1937 1938 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 1939 1940 if ((bp->b_flags & (B_READ | B_ASYNC)) == (B_READ | B_ASYNC)) { 1941 argsize = sizeof(struct puffs_vnreq_read); 1942 read_argp = malloc(argsize + tomove, 1943 M_PUFFS, M_NOWAIT | M_ZERO); 1944 if (read_argp == NULL) { 1945 error = ENOMEM; 1946 goto out; 1947 } 1948 1949 read_argp->pvnr_ioflag = 0; 1950 read_argp->pvnr_resid = tomove; 1951 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1952 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1953 1954 puffs_vntouser_call(pmp, PUFFS_VN_READ, read_argp, 1955 argsize, tomove, puffs_parkdone_asyncbioread, bp, vp, NULL); 1956 error = 0; 1957 goto wayout; 1958 } else if (bp->b_flags & B_READ) { 1959 argsize = sizeof(struct puffs_vnreq_read); 1960 read_argp = malloc(argsize + tomove, 1961 M_PUFFS, M_WAITOK | M_ZERO); 1962 1963 read_argp->pvnr_ioflag = 0; 1964 read_argp->pvnr_resid = tomove; 1965 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1966 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1967 1968 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1969 read_argp, argsize, tomove, vp, NULL); 1970 1971 if (error) 1972 goto out; 1973 1974 if (read_argp->pvnr_resid > tomove) { 1975 error = EINVAL; 1976 goto out; 1977 } 1978 1979 moved = tomove - read_argp->pvnr_resid; 1980 1981 (void)memcpy(bp->b_data, read_argp->pvnr_data, moved); 1982 bp->b_resid = bp->b_bcount - moved; 1983 } else { 1984 /* 1985 * make pages read-only before we write them if we want 1986 * write caching info 1987 */ 1988 if (PUFFS_WCACHEINFO(pmp)) { 1989 struct uvm_object *uobj = &vp->v_uobj; 1990 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 1991 struct vm_page *vmp; 1992 int i; 1993 1994 for (i = 0; i < npages; i++) { 1995 vmp= uvm_pageratop((vaddr_t)bp->b_data 1996 + (i << PAGE_SHIFT)); 1997 DPRINTF(("puffs_strategy: write-protecting " 1998 "vp %p page %p, offset %" PRId64"\n", 1999 vp, vmp, vmp->offset)); 2000 simple_lock(&uobj->vmobjlock); 2001 vmp->flags |= PG_RDONLY; 2002 pmap_page_protect(vmp, VM_PROT_READ); 2003 simple_unlock(&uobj->vmobjlock); 2004 } 2005 } 2006 2007 argsize = sizeof(struct puffs_vnreq_write) + bp->b_bcount; 2008 write_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 2009 if (write_argp == NULL) { 2010 error = ENOMEM; 2011 goto out; 2012 } 2013 2014 write_argp->pvnr_ioflag = 0; 2015 write_argp->pvnr_resid = tomove; 2016 write_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 2017 puffs_credcvt(&write_argp->pvnr_cred, FSCRED); 2018 2019 (void)memcpy(&write_argp->pvnr_data, bp->b_data, tomove); 2020 2021 if (dowritefaf) { 2022 /* 2023 * assume FAF moves everything. frankly, we don't 2024 * really have a choice. 2025 */ 2026 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 2027 PUFFS_VN_WRITE, write_argp, argsize, vp); 2028 bp->b_resid = bp->b_bcount - tomove; 2029 } else { 2030 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 2031 PUFFS_VN_WRITE, write_argp, argsize, 0, vp, NULL); 2032 if (error) 2033 goto out; 2034 2035 moved = tomove - write_argp->pvnr_resid; 2036 if (write_argp->pvnr_resid > tomove) { 2037 error = EINVAL; 2038 goto out; 2039 } 2040 2041 bp->b_resid = bp->b_bcount - moved; 2042 if (write_argp->pvnr_resid != 0) 2043 error = EIO; 2044 } 2045 } 2046 2047 out: 2048 if (read_argp) 2049 free(read_argp, M_PUFFS); 2050 if (write_argp && !dowritefaf) 2051 free(write_argp, M_PUFFS); 2052 2053 if (error) { 2054 bp->b_error = error; 2055 bp->b_flags |= B_ERROR; 2056 } 2057 2058 if (error || ((bp->b_flags & (B_READ | B_ASYNC)) != (B_READ | B_ASYNC))) 2059 biodone(bp); 2060 wayout: 2061 return error; 2062 } 2063 2064 int 2065 puffs_mmap(void *v) 2066 { 2067 struct vop_mmap_args /* { 2068 const struct vnodeop_desc *a_desc; 2069 struct vnode *a_vp; 2070 int a_fflags; 2071 kauth_cred_t a_cred; 2072 struct lwp *a_l; 2073 } */ *ap = v; 2074 struct puffs_mount *pmp; 2075 int error; 2076 2077 PUFFS_VNREQ(mmap); 2078 2079 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2080 2081 if (!PUFFS_DOCACHE(pmp)) 2082 return genfs_eopnotsupp(v); 2083 2084 if (EXISTSOP(pmp, MMAP)) { 2085 mmap_arg.pvnr_fflags = ap->a_fflags; 2086 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 2087 mmap_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 2088 2089 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 2090 &mmap_arg, sizeof(mmap_arg), 0, 2091 ap->a_vp, NULL); 2092 } else { 2093 error = genfs_mmap(v); 2094 } 2095 2096 return error; 2097 } 2098 2099 2100 /* 2101 * The rest don't get a free trip to userspace and back, they 2102 * have to stay within the kernel. 2103 */ 2104 2105 /* 2106 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2107 * well, maybe somehow, somewhere, some day .... 2108 */ 2109 int 2110 puffs_bmap(void *v) 2111 { 2112 struct vop_bmap_args /* { 2113 const struct vnodeop_desc *a_desc; 2114 struct vnode *a_vp; 2115 daddr_t a_bn; 2116 struct vnode **a_vpp; 2117 daddr_t *a_bnp; 2118 int *a_runp; 2119 } */ *ap = v; 2120 struct puffs_mount *pmp; 2121 2122 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2123 2124 if (ap->a_vpp) 2125 *ap->a_vpp = ap->a_vp; 2126 if (ap->a_bnp) 2127 *ap->a_bnp = ap->a_bn; 2128 if (ap->a_runp) 2129 *ap->a_runp 2130 = (PUFFS_TOMOVE(pmp->pmp_req_maxsize, pmp)>>DEV_BSHIFT) - 1; 2131 2132 return 0; 2133 } 2134 2135 /* 2136 * Handle getpages faults in puffs. We let genfs_getpages() do most 2137 * of the dirty work, but we come in this route to do accounting tasks. 2138 * If the user server has specified functions for cache notifications 2139 * about reads and/or writes, we record which type of operation we got, 2140 * for which page range, and proceed to issue a FAF notification to the 2141 * server about it. 2142 */ 2143 int 2144 puffs_getpages(void *v) 2145 { 2146 struct vop_getpages_args /* { 2147 const struct vnodeop_desc *a_desc; 2148 struct vnode *a_vp; 2149 voff_t a_offset; 2150 struct vm_page **a_m; 2151 int *a_count; 2152 int a_centeridx; 2153 vm_prot_t a_access_type; 2154 int a_advice; 2155 int a_flags; 2156 } */ *ap = v; 2157 struct puffs_mount *pmp; 2158 struct vnode *vp; 2159 struct vm_page **pgs; 2160 struct puffs_cacheinfo *pcinfo = NULL; 2161 struct puffs_cacherun *pcrun; 2162 void *parkmem = NULL; 2163 size_t runsizes; 2164 int i, npages, si, streakon; 2165 int error, locked, write; 2166 2167 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2168 npages = *ap->a_count; 2169 pgs = ap->a_m; 2170 vp = ap->a_vp; 2171 locked = (ap->a_flags & PGO_LOCKED) != 0; 2172 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2173 2174 /* ccg xnaht - gets Wuninitialized wrong */ 2175 pcrun = NULL; 2176 runsizes = 0; 2177 2178 if (write && PUFFS_WCACHEINFO(pmp)) { 2179 /* allocate worst-case memory */ 2180 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2181 pcinfo = malloc(sizeof(struct puffs_cacheinfo) + runsizes, 2182 M_PUFFS, M_ZERO | locked ? M_NOWAIT : M_WAITOK); 2183 2184 /* 2185 * can't block if we're locked and can't mess up caching 2186 * information for fs server. so come back later, please 2187 */ 2188 if (pcinfo == NULL) { 2189 error = ENOMEM; 2190 goto out; 2191 } 2192 2193 parkmem = puffs_park_alloc(locked == 0); 2194 if (parkmem == NULL) { 2195 error = ENOMEM; 2196 goto out; 2197 } 2198 2199 pcrun = pcinfo->pcache_runs; 2200 } 2201 2202 error = genfs_getpages(v); 2203 if (error) 2204 goto out; 2205 2206 if (PUFFS_WCACHEINFO(pmp) == 0) 2207 goto out; 2208 2209 /* 2210 * Let's see whose fault it was and inform the user server of 2211 * possibly read/written pages. Map pages from read faults 2212 * strictly read-only, since otherwise we might miss info on 2213 * when the page is actually write-faulted to. 2214 */ 2215 if (!locked) 2216 simple_lock(&vp->v_uobj.vmobjlock); 2217 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2218 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2219 if (streakon && write) { 2220 streakon = 0; 2221 pcrun[si].pcache_runend 2222 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2223 si++; 2224 } 2225 continue; 2226 } 2227 if (streakon == 0 && write) { 2228 streakon = 1; 2229 pcrun[si].pcache_runstart = pgs[i]->offset; 2230 } 2231 2232 if (!write) 2233 pgs[i]->flags |= PG_RDONLY; 2234 } 2235 /* was the last page part of our streak? */ 2236 if (streakon) { 2237 pcrun[si].pcache_runend 2238 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2239 si++; 2240 } 2241 if (!locked) 2242 simple_unlock(&vp->v_uobj.vmobjlock); 2243 2244 KASSERT(si <= (npages / 2) + 1); 2245 2246 /* send results to userspace */ 2247 if (write) 2248 puffs_cacheop(pmp, parkmem, pcinfo, 2249 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2250 2251 out: 2252 if (error) { 2253 if (pcinfo != NULL) 2254 free(pcinfo, M_PUFFS); 2255 if (parkmem != NULL) 2256 puffs_park_release(parkmem, 1); 2257 } 2258 2259 return error; 2260 } 2261 2262 int 2263 puffs_lock(void *v) 2264 { 2265 struct vop_lock_args /* { 2266 struct vnode *a_vp; 2267 int a_flags; 2268 }*/ *ap = v; 2269 struct vnode *vp = ap->a_vp; 2270 struct mount *mp = vp->v_mount; 2271 2272 #if 0 2273 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2274 #endif 2275 2276 /* 2277 * XXX: this avoids deadlocking when we're suspending. 2278 * e.g. some ops holding the vnode lock might be blocked for 2279 * the vfs transaction lock so we'd deadlock. 2280 * 2281 * Now once again this is skating on the thin ice of modern life, 2282 * since we are breaking the consistency guarantee provided 2283 * _to the user server_ by vnode locking. Hopefully this will 2284 * get fixed soon enough by getting rid of the dependency on 2285 * vnode locks alltogether. 2286 */ 2287 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2288 if (ap->a_flags & LK_INTERLOCK) 2289 simple_unlock(&vp->v_interlock); 2290 return 0; 2291 } 2292 2293 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2294 } 2295 2296 int 2297 puffs_unlock(void *v) 2298 { 2299 struct vop_unlock_args /* { 2300 struct vnode *a_vp; 2301 int a_flags; 2302 } */ *ap = v; 2303 struct vnode *vp = ap->a_vp; 2304 struct mount *mp = vp->v_mount; 2305 2306 #if 0 2307 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2308 #endif 2309 2310 /* XXX: see puffs_lock() */ 2311 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2312 if (ap->a_flags & LK_INTERLOCK) 2313 simple_unlock(&vp->v_interlock); 2314 return 0; 2315 } 2316 2317 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2318 } 2319 2320 int 2321 puffs_islocked(void *v) 2322 { 2323 struct vop_islocked_args *ap = v; 2324 int rv; 2325 2326 rv = lockstatus(&ap->a_vp->v_lock); 2327 return rv; 2328 } 2329 2330 int 2331 puffs_generic(void *v) 2332 { 2333 struct vop_generic_args *ap = v; 2334 2335 (void)ap; 2336 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2337 2338 return EOPNOTSUPP; 2339 } 2340 2341 2342 /* 2343 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2344 * FAF update information for the puffs node first. 2345 */ 2346 int 2347 puffs_spec_read(void *v) 2348 { 2349 struct vop_read_args /* { 2350 const struct vnodeop_desc *a_desc; 2351 struct vnode *a_vp; 2352 struct uio *a_uio; 2353 int a_ioflag; 2354 kauth_cred_t a_cred; 2355 } */ *ap = v; 2356 2357 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2358 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2359 } 2360 2361 int 2362 puffs_spec_write(void *v) 2363 { 2364 struct vop_write_args /* { 2365 const struct vnodeop_desc *a_desc; 2366 struct vnode *a_vp; 2367 struct uio *a_uio; 2368 int a_ioflag; 2369 kauth_cred_t a_cred; 2370 }*/ *ap = v; 2371 2372 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2373 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2374 } 2375 2376 int 2377 puffs_fifo_read(void *v) 2378 { 2379 struct vop_read_args /* { 2380 const struct vnodeop_desc *a_desc; 2381 struct vnode *a_vp; 2382 struct uio *a_uio; 2383 int a_ioflag; 2384 kauth_cred_t a_cred; 2385 } */ *ap = v; 2386 2387 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2388 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2389 } 2390 2391 int 2392 puffs_fifo_write(void *v) 2393 { 2394 struct vop_write_args /* { 2395 const struct vnodeop_desc *a_desc; 2396 struct vnode *a_vp; 2397 struct uio *a_uio; 2398 int a_ioflag; 2399 kauth_cred_t a_cred; 2400 }*/ *ap = v; 2401 2402 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2403 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2404 } 2405
Indexes created Wed Oct 01 13:09:50 GMT 2025