puffs_vnops.c revision 1.75
1 /* $NetBSD: puffs_vnops.c,v 1.75 2007/06/06 01:33:10 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 1.75 2007/06/06 01:33:10 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, rv; 349 350 offset = ap->a_desc->vdesc_vp_offsets[0]; 351 #ifdef DIAGNOSTIC 352 if (offset == VDESC_NO_OFFSET) 353 panic("puffs_checkop: no vnode, why did you call me?"); 354 #endif 355 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 356 pmp = MPTOPUFFSMP(vp->v_mount); 357 358 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 359 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 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 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 399 400 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 401 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 402 403 return rv; 404 } 405 406 407 int 408 puffs_lookup(void *v) 409 { 410 struct vop_lookup_args /* { 411 const struct vnodeop_desc *a_desc; 412 struct vnode *a_dvp; 413 struct vnode **a_vpp; 414 struct componentname *a_cnp; 415 } */ *ap = v; 416 struct puffs_mount *pmp; 417 struct componentname *cnp; 418 struct vnode *vp, *dvp; 419 struct puffs_node *dpn; 420 int isdot; 421 int error; 422 423 PUFFS_VNREQ(lookup); 424 425 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 426 cnp = ap->a_cnp; 427 dvp = ap->a_dvp; 428 *ap->a_vpp = NULL; 429 430 /* first things first: check access */ 431 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 432 if (error) 433 return error; 434 435 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 436 437 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %lx\n", 438 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 439 440 /* 441 * Check if someone fed it into the cache 442 */ 443 if (PUFFS_DOCACHE(pmp)) { 444 error = cache_lookup(dvp, ap->a_vpp, cnp); 445 446 if (error >= 0) 447 return error; 448 } 449 450 if (isdot) { 451 vp = ap->a_dvp; 452 vref(vp); 453 *ap->a_vpp = vp; 454 return 0; 455 } 456 457 puffs_makecn(&lookup_arg.pvnr_cn, cnp); 458 459 if (cnp->cn_flags & ISDOTDOT) 460 VOP_UNLOCK(dvp, 0); 461 462 error = puffs_vntouser(pmp, PUFFS_VN_LOOKUP, 463 &lookup_arg, sizeof(lookup_arg), 0, dvp, NULL); 464 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 465 466 /* 467 * In case of error, there is no new vnode to play with, so be 468 * happy with the NULL value given to vpp in the beginning. 469 * Also, check if this really was an error or the target was not 470 * present. Either treat it as a non-error for CREATE/RENAME or 471 * enter the component into the negative name cache (if desired). 472 */ 473 if (error) { 474 if (error == ENOENT) { 475 if ((cnp->cn_flags & ISLASTCN) 476 && (cnp->cn_nameiop == CREATE 477 || cnp->cn_nameiop == RENAME)) { 478 cnp->cn_flags |= SAVENAME; 479 error = EJUSTRETURN; 480 } else { 481 if ((cnp->cn_flags & MAKEENTRY) 482 && PUFFS_DOCACHE(pmp)) 483 cache_enter(dvp, NULL, cnp); 484 } 485 } else if (error < 0) { 486 error = EINVAL; 487 } 488 goto errout; 489 } 490 491 /* 492 * Check that we don't get our parent node back, that would cause 493 * a pretty obvious deadlock. 494 */ 495 dpn = dvp->v_data; 496 if (lookup_arg.pvnr_newnode == dpn->pn_cookie) { 497 error = EINVAL; 498 goto errout; 499 } 500 501 /* XXX: race here */ 502 /* XXX2: this check for node existence twice */ 503 vp = puffs_pnode2vnode(pmp, lookup_arg.pvnr_newnode, 1); 504 if (!vp) { 505 error = puffs_getvnode(dvp->v_mount, 506 lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype, 507 lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp); 508 if (error) { 509 goto errout; 510 } 511 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 512 } 513 *ap->a_vpp = vp; 514 515 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_DOCACHE(pmp)) 516 cache_enter(dvp, vp, cnp); 517 518 errout: 519 if (cnp->cn_flags & ISDOTDOT) 520 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 521 522 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 523 return error; 524 } 525 526 int 527 puffs_create(void *v) 528 { 529 struct vop_create_args /* { 530 const struct vnodeop_desc *a_desc; 531 struct vnode *a_dvp; 532 struct vnode **a_vpp; 533 struct componentname *a_cnp; 534 struct vattr *a_vap; 535 } */ *ap = v; 536 int error; 537 538 PUFFS_VNREQ(create); 539 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 540 ap->a_dvp, ap->a_cnp->cn_nameptr)); 541 542 puffs_makecn(&create_arg.pvnr_cn, ap->a_cnp); 543 create_arg.pvnr_va = *ap->a_vap; 544 545 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_CREATE, 546 &create_arg, sizeof(create_arg), 0, ap->a_dvp, NULL); 547 if (error) 548 goto out; 549 550 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 551 create_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 0); 552 /* XXX: in case of error, need to uncommit userspace transaction */ 553 554 out: 555 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 556 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 557 vput(ap->a_dvp); 558 559 DPRINTF(("puffs_create: return %d\n", error)); 560 return error; 561 } 562 563 int 564 puffs_mknod(void *v) 565 { 566 struct vop_mknod_args /* { 567 const struct vnodeop_desc *a_desc; 568 struct vnode *a_dvp; 569 struct vnode **a_vpp; 570 struct componentname *a_cnp; 571 struct vattr *a_vap; 572 } */ *ap = v; 573 int error; 574 575 PUFFS_VNREQ(mknod); 576 577 puffs_makecn(&mknod_arg.pvnr_cn, ap->a_cnp); 578 mknod_arg.pvnr_va = *ap->a_vap; 579 580 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKNOD, 581 &mknod_arg, sizeof(mknod_arg), 0, ap->a_dvp, NULL); 582 if (error) 583 goto out; 584 585 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 586 mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 587 ap->a_vap->va_rdev); 588 589 out: 590 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 591 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 592 vput(ap->a_dvp); 593 return error; 594 } 595 596 int 597 puffs_open(void *v) 598 { 599 struct vop_open_args /* { 600 const struct vnodeop_desc *a_desc; 601 struct vnode *a_vp; 602 int a_mode; 603 kauth_cred_t a_cred; 604 struct lwp *a_l; 605 } */ *ap = v; 606 struct vnode *vp = ap->a_vp; 607 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 608 int mode = ap->a_mode; 609 int rv; 610 611 PUFFS_VNREQ(open); 612 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 613 614 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) { 615 rv = EROFS; 616 goto out; 617 } 618 619 if (!EXISTSOP(pmp, OPEN)) { 620 rv = 0; 621 goto out; 622 } 623 624 open_arg.pvnr_mode = mode; 625 puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred); 626 open_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 627 628 rv = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_OPEN, 629 &open_arg, sizeof(open_arg), 0, vp, NULL); 630 631 out: 632 DPRINTF(("puffs_open: returning %d\n", rv)); 633 return rv; 634 } 635 636 int 637 puffs_close(void *v) 638 { 639 struct vop_close_args /* { 640 const struct vnodeop_desc *a_desc; 641 struct vnode *a_vp; 642 int a_fflag; 643 kauth_cred_t a_cred; 644 struct lwp *a_l; 645 } */ *ap = v; 646 struct puffs_vnreq_close *close_argp; 647 648 close_argp = malloc(sizeof(struct puffs_vnreq_close), 649 M_PUFFS, M_WAITOK | M_ZERO); 650 close_argp->pvnr_fflag = ap->a_fflag; 651 puffs_credcvt(&close_argp->pvnr_cred, ap->a_cred); 652 close_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 653 654 puffs_vntouser_faf(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 655 close_argp, sizeof(struct puffs_vnreq_close), ap->a_vp); 656 657 return 0; 658 } 659 660 int 661 puffs_access(void *v) 662 { 663 struct vop_access_args /* { 664 const struct vnodeop_desc *a_desc; 665 struct vnode *a_vp; 666 int a_mode; 667 kauth_cred_t a_cred; 668 struct lwp *a_l; 669 } */ *ap = v; 670 struct vnode *vp = ap->a_vp; 671 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 672 int mode = ap->a_mode; 673 674 PUFFS_VNREQ(access); 675 676 if (vp->v_type == VREG && mode & VWRITE && !EXISTSOP(pmp, WRITE)) 677 return EROFS; 678 679 if (!EXISTSOP(pmp, ACCESS)) 680 return 0; 681 682 access_arg.pvnr_mode = ap->a_mode; 683 access_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 684 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 685 686 return puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_ACCESS, 687 &access_arg, sizeof(access_arg), 0, vp, NULL); 688 } 689 690 int 691 puffs_getattr(void *v) 692 { 693 struct vop_getattr_args /* { 694 const struct vnodeop_desc *a_desc; 695 struct vnode *a_vp; 696 struct vattr *a_vap; 697 kauth_cred_t a_cred; 698 struct lwp *a_l; 699 } */ *ap = v; 700 struct mount *mp; 701 struct vnode *vp; 702 struct vattr *vap, *rvap; 703 struct puffs_node *pn; 704 int error; 705 706 PUFFS_VNREQ(getattr); 707 708 vp = ap->a_vp; 709 mp = vp->v_mount; 710 vap = ap->a_vap; 711 712 vattr_null(&getattr_arg.pvnr_va); 713 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 714 getattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 715 716 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), PUFFS_VN_GETATTR, 717 &getattr_arg, sizeof(getattr_arg), 0, vp, NULL); 718 if (error) 719 return error; 720 721 rvap = &getattr_arg.pvnr_va; 722 /* 723 * Don't listen to the file server regarding special device 724 * size info, the file server doesn't know anything about them. 725 */ 726 if (vp->v_type == VBLK || vp->v_type == VCHR) 727 rvap->va_size = vp->v_size; 728 729 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 730 if (vp->v_type == VBLK) 731 rvap->va_blocksize = BLKDEV_IOSIZE; 732 else if (vp->v_type == VCHR) 733 rvap->va_blocksize = MAXBSIZE; 734 735 (void) memcpy(vap, rvap, sizeof(struct vattr)); 736 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 737 738 pn = VPTOPP(vp); 739 if (pn->pn_stat & PNODE_METACACHE_ATIME) 740 vap->va_atime = pn->pn_mc_atime; 741 if (pn->pn_stat & PNODE_METACACHE_CTIME) 742 vap->va_ctime = pn->pn_mc_ctime; 743 if (pn->pn_stat & PNODE_METACACHE_MTIME) 744 vap->va_mtime = pn->pn_mc_mtime; 745 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 746 vap->va_size = pn->pn_mc_size; 747 } else { 748 if (rvap->va_size != VNOVAL 749 && vp->v_type != VBLK && vp->v_type != VCHR) 750 uvm_vnp_setsize(vp, rvap->va_size); 751 } 752 753 return 0; 754 } 755 756 int 757 puffs_setattr(void *v) 758 { 759 struct vop_getattr_args /* { 760 const struct vnodeop_desc *a_desc; 761 struct vnode *a_vp; 762 struct vattr *a_vap; 763 kauth_cred_t a_cred; 764 struct lwp *a_l; 765 } */ *ap = v; 766 int error; 767 struct vattr *vap = ap->a_vap; 768 struct puffs_node *pn = ap->a_vp->v_data; 769 770 PUFFS_VNREQ(setattr); 771 772 /* 773 * Flush metacache first. If we are called with some explicit 774 * parameters, treat them as information overriding metacache 775 * information. 776 */ 777 if (pn->pn_stat & PNODE_METACACHE_MASK) { 778 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 779 && vap->va_atime.tv_sec == VNOVAL) 780 vap->va_atime = pn->pn_mc_atime; 781 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 782 && vap->va_ctime.tv_sec == VNOVAL) 783 vap->va_ctime = pn->pn_mc_ctime; 784 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 785 && vap->va_mtime.tv_sec == VNOVAL) 786 vap->va_mtime = pn->pn_mc_mtime; 787 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 788 && vap->va_size == VNOVAL) 789 vap->va_size = pn->pn_mc_size; 790 791 pn->pn_stat &= ~PNODE_METACACHE_MASK; 792 } 793 794 (void)memcpy(&setattr_arg.pvnr_va, vap, sizeof(struct vattr)); 795 puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred); 796 setattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 797 798 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR, 799 &setattr_arg, sizeof(setattr_arg), 0, ap->a_vp, NULL); 800 if (error) 801 return error; 802 803 if (vap->va_size != VNOVAL) 804 uvm_vnp_setsize(ap->a_vp, vap->va_size); 805 806 return 0; 807 } 808 809 int 810 puffs_inactive(void *v) 811 { 812 struct vop_inactive_args /* { 813 const struct vnodeop_desc *a_desc; 814 struct vnode *a_vp; 815 struct lwp *a_l; 816 } */ *ap = v; 817 struct puffs_mount *pmp; 818 struct puffs_node *pnode; 819 int rv, vnrefs, call; 820 821 PUFFS_VNREQ(inactive); 822 823 /* 824 * XXX: think about this after we really start unlocking 825 * when going to userspace 826 */ 827 pnode = ap->a_vp->v_data; 828 829 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 830 831 inactive_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 832 833 if (EXISTSOP(pmp, INACTIVE)) 834 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 835 if ((pnode->pn_stat & PNODE_DOINACT) || ALLOPS(pmp)) 836 call = 1; 837 else 838 call = 0; 839 else 840 call = 1; 841 else 842 call = 0; 843 844 if (call) 845 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 846 &inactive_arg, sizeof(inactive_arg), 0, ap->a_vp, NULL); 847 else 848 rv = 1; /* see below */ 849 pnode->pn_stat &= ~PNODE_DOINACT; 850 851 /* can't trust userspace return value? simulate safe answer */ 852 if (rv) 853 vnrefs = 1; 854 else 855 vnrefs = inactive_arg.pvnr_backendrefs; 856 857 VOP_UNLOCK(ap->a_vp, 0); 858 859 /* 860 * user server thinks it's gone? then don't be afraid care, 861 * node's life was already all it would ever be 862 */ 863 if (vnrefs == 0 || (pnode->pn_stat & PNODE_NOREFS)) { 864 pnode->pn_stat |= PNODE_DYING; 865 vrecycle(ap->a_vp, NULL, ap->a_l); 866 } 867 868 return 0; 869 } 870 871 /* 872 * always FAF, we don't really care if the server wants to fail to 873 * reclaim the node or not 874 */ 875 int 876 puffs_reclaim(void *v) 877 { 878 struct vop_reclaim_args /* { 879 const struct vnodeop_desc *a_desc; 880 struct vnode *a_vp; 881 struct lwp *a_l; 882 } */ *ap = v; 883 struct puffs_mount *pmp; 884 struct puffs_vnreq_reclaim *reclaim_argp; 885 886 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 887 888 /* 889 * first things first: check if someone is trying to reclaim the 890 * root vnode. do not allow that to travel to userspace. 891 * Note that we don't need to take the lock similarly to 892 * puffs_root(), since there is only one of us. 893 */ 894 if (ap->a_vp->v_flag & VROOT) { 895 mutex_enter(&pmp->pmp_lock); 896 KASSERT(pmp->pmp_root != NULL); 897 pmp->pmp_root = NULL; 898 mutex_exit(&pmp->pmp_lock); 899 goto out; 900 } 901 902 if (!EXISTSOP(pmp, RECLAIM)) 903 goto out; 904 905 reclaim_argp = malloc(sizeof(struct puffs_vnreq_reclaim), 906 M_PUFFS, M_WAITOK | M_ZERO); 907 reclaim_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 908 909 puffs_vntouser_faf(pmp, PUFFS_VN_RECLAIM, 910 reclaim_argp, sizeof(struct puffs_vnreq_reclaim), ap->a_vp); 911 912 out: 913 if (PUFFS_DOCACHE(pmp)) 914 cache_purge(ap->a_vp); 915 puffs_putvnode(ap->a_vp); 916 917 return 0; 918 } 919 920 #define CSIZE sizeof(**ap->a_cookies) 921 int 922 puffs_readdir(void *v) 923 { 924 struct vop_readdir_args /* { 925 const struct vnodeop_desc *a_desc; 926 struct vnode *a_vp; 927 struct uio *a_uio; 928 kauth_cred_t a_cred; 929 int *a_eofflag; 930 off_t **a_cookies; 931 int *a_ncookies; 932 } */ *ap = v; 933 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 934 struct puffs_vnreq_readdir *readdir_argp; 935 size_t argsize, tomove, cookiemem, cookiesmax; 936 struct uio *uio = ap->a_uio; 937 size_t howmuch; 938 int error; 939 940 if (ap->a_cookies) { 941 KASSERT(ap->a_ncookies != NULL); 942 if (pmp->pmp_args.pa_fhsize == 0) 943 return EOPNOTSUPP; 944 cookiesmax = uio->uio_resid/_DIRENT_MINSIZE((struct dirent *)0); 945 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 946 } else { 947 cookiesmax = 0; 948 cookiemem = 0; 949 } 950 951 argsize = sizeof(struct puffs_vnreq_readdir); 952 tomove = uio->uio_resid + cookiemem; 953 readdir_argp = malloc(argsize + tomove, M_PUFFS, M_ZERO | M_WAITOK); 954 955 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 956 readdir_argp->pvnr_offset = uio->uio_offset; 957 readdir_argp->pvnr_resid = uio->uio_resid; 958 readdir_argp->pvnr_ncookies = cookiesmax; 959 readdir_argp->pvnr_eofflag = 0; 960 readdir_argp->pvnr_dentoff = cookiemem; 961 962 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 963 PUFFS_VN_READDIR, readdir_argp, argsize, tomove, 964 ap->a_vp, NULL); 965 if (error) 966 goto out; 967 968 /* userspace is cheating? */ 969 if (readdir_argp->pvnr_resid > uio->uio_resid 970 || readdir_argp->pvnr_ncookies > cookiesmax) { 971 error = EINVAL; 972 goto out; 973 } 974 975 /* check eof */ 976 if (readdir_argp->pvnr_eofflag) 977 *ap->a_eofflag = 1; 978 979 /* bouncy-wouncy with the directory data */ 980 howmuch = uio->uio_resid - readdir_argp->pvnr_resid; 981 982 /* force eof if no data was returned (getcwd() needs this) */ 983 if (howmuch == 0) { 984 *ap->a_eofflag = 1; 985 goto out; 986 } 987 988 error = uiomove(readdir_argp->pvnr_data + cookiemem, howmuch, uio); 989 if (error) 990 goto out; 991 992 /* provide cookies to caller if so desired */ 993 if (ap->a_cookies) { 994 *ap->a_cookies = malloc(readdir_argp->pvnr_ncookies*CSIZE, 995 M_TEMP, M_WAITOK); 996 *ap->a_ncookies = readdir_argp->pvnr_ncookies; 997 memcpy(*ap->a_cookies, readdir_argp->pvnr_data, 998 *ap->a_ncookies*CSIZE); 999 } 1000 1001 /* next readdir starts here */ 1002 uio->uio_offset = readdir_argp->pvnr_offset; 1003 1004 out: 1005 free(readdir_argp, M_PUFFS); 1006 return error; 1007 } 1008 #undef CSIZE 1009 1010 /* 1011 * poll works by consuming the bitmask in pn_revents. If there are 1012 * events available, poll returns immediately. If not, it issues a 1013 * poll to userspace, selrecords itself and returns with no available 1014 * events. When the file server returns, it executes puffs_parkdone_poll(), 1015 * where available events are added to the bitmask. selnotify() is 1016 * then also executed by that function causing us to enter here again 1017 * and hopefully find the missing bits (unless someone got them first, 1018 * in which case it starts all over again). 1019 */ 1020 int 1021 puffs_poll(void *v) 1022 { 1023 struct vop_poll_args /* { 1024 const struct vnodeop_desc *a_desc; 1025 struct vnode *a_vp; 1026 int a_events; 1027 struct lwp *a_l; 1028 }*/ *ap = v; 1029 struct vnode *vp = ap->a_vp; 1030 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1031 struct puffs_vnreq_poll *poll_argp; 1032 struct puffs_node *pn = vp->v_data; 1033 int events; 1034 1035 if (EXISTSOP(pmp, POLL)) { 1036 mutex_enter(&pn->pn_mtx); 1037 events = pn->pn_revents & ap->a_events; 1038 if (events & ap->a_events) { 1039 pn->pn_revents &= ~ap->a_events; 1040 mutex_exit(&pn->pn_mtx); 1041 1042 return events; 1043 } else { 1044 puffs_referencenode(pn); 1045 mutex_exit(&pn->pn_mtx); 1046 1047 /* freed in puffs_parkdone_poll */ 1048 poll_argp = malloc(sizeof(struct puffs_vnreq_poll), 1049 M_PUFFS, M_ZERO | M_WAITOK); 1050 1051 poll_argp->pvnr_events = ap->a_events; 1052 poll_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 1053 1054 selrecord(ap->a_l, &pn->pn_sel); 1055 puffs_vntouser_call(pmp, PUFFS_VN_POLL, 1056 poll_argp, sizeof(struct puffs_vnreq_poll), 0, 1057 puffs_parkdone_poll, pn, 1058 vp, NULL); 1059 1060 return 0; 1061 } 1062 } else { 1063 return genfs_poll(v); 1064 } 1065 } 1066 1067 int 1068 puffs_fsync(void *v) 1069 { 1070 struct vop_fsync_args /* { 1071 const struct vnodeop_desc *a_desc; 1072 struct vnode *a_vp; 1073 kauth_cred_t a_cred; 1074 int a_flags; 1075 off_t a_offlo; 1076 off_t a_offhi; 1077 struct lwp *a_l; 1078 } */ *ap = v; 1079 struct vattr va; 1080 struct puffs_mount *pmp; 1081 struct puffs_vnreq_fsync *fsync_argp; 1082 struct vnode *vp; 1083 struct puffs_node *pn; 1084 int pflags, error, dofaf; 1085 1086 PUFFS_VNREQ(fsync); 1087 1088 vp = ap->a_vp; 1089 pn = VPTOPP(vp); 1090 pmp = MPTOPUFFSMP(vp->v_mount); 1091 1092 /* flush out information from our metacache, see vop_setattr */ 1093 if (pn->pn_stat & PNODE_METACACHE_MASK 1094 && (pn->pn_stat & PNODE_DYING) == 0) { 1095 vattr_null(&va); 1096 error = VOP_SETATTR(vp, &va, FSCRED, NULL); 1097 if (error) 1098 return error; 1099 } 1100 1101 /* 1102 * flush pages to avoid being overly dirty 1103 */ 1104 pflags = PGO_CLEANIT; 1105 if (ap->a_flags & FSYNC_WAIT) 1106 pflags |= PGO_SYNCIO; 1107 simple_lock(&vp->v_interlock); 1108 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1109 round_page(ap->a_offhi), pflags); 1110 if (error) 1111 return error; 1112 1113 /* 1114 * HELLO! We exit already here if the user server does not 1115 * support fsync OR if we should call fsync for a node which 1116 * has references neither in the kernel or the fs server. 1117 * Otherwise we continue to issue fsync() forward. 1118 */ 1119 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1120 return 0; 1121 1122 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1123 /* 1124 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1125 * only FAFs for those. Otherwise there's a danger of deadlock, 1126 * since the execution context here might be the user server 1127 * doing some operation on another fs, which in turn caused a 1128 * vnode to be reclaimed from the freelist for this fs. 1129 */ 1130 if (dofaf == 0) { 1131 simple_lock(&vp->v_interlock); 1132 if (vp->v_flag & VXLOCK) 1133 dofaf = 1; 1134 simple_unlock(&vp->v_interlock); 1135 } 1136 1137 if (dofaf == 0) { 1138 fsync_argp = &fsync_arg; 1139 } else { 1140 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 1141 M_PUFFS, M_ZERO | M_NOWAIT); 1142 if (fsync_argp == NULL) 1143 return ENOMEM; 1144 } 1145 1146 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 1147 fsync_argp->pvnr_flags = ap->a_flags; 1148 fsync_argp->pvnr_offlo = ap->a_offlo; 1149 fsync_argp->pvnr_offhi = ap->a_offhi; 1150 fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 1151 1152 /* 1153 * XXX: see comment at puffs_getattr about locking 1154 * 1155 * If we are not required to wait, do a FAF operation. 1156 * Otherwise block here. 1157 */ 1158 if (dofaf == 0) { 1159 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1160 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 0, 1161 vp, NULL); 1162 } else { 1163 /* FAF is always "succesful" */ 1164 error = 0; 1165 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1166 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), vp); 1167 } 1168 1169 return error; 1170 } 1171 1172 int 1173 puffs_seek(void *v) 1174 { 1175 struct vop_seek_args /* { 1176 const struct vnodeop_desc *a_desc; 1177 struct vnode *a_vp; 1178 off_t a_oldoff; 1179 off_t a_newoff; 1180 kauth_cred_t a_cred; 1181 } */ *ap = v; 1182 1183 PUFFS_VNREQ(seek); 1184 1185 seek_arg.pvnr_oldoff = ap->a_oldoff; 1186 seek_arg.pvnr_newoff = ap->a_newoff; 1187 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1188 1189 /* 1190 * XXX: seems like seek is called with an unlocked vp, but 1191 * it can't hurt to play safe 1192 */ 1193 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1194 &seek_arg, sizeof(seek_arg), 0, ap->a_vp, NULL); 1195 } 1196 1197 int 1198 puffs_remove(void *v) 1199 { 1200 struct vop_remove_args /* { 1201 const struct vnodeop_desc *a_desc; 1202 struct vnode *a_dvp; 1203 struct vnode *a_vp; 1204 struct componentname *a_cnp; 1205 } */ *ap = v; 1206 int error; 1207 1208 PUFFS_VNREQ(remove); 1209 1210 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1211 puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp); 1212 1213 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE, 1214 &remove_arg, sizeof(remove_arg), 0, ap->a_dvp, ap->a_vp); 1215 1216 vput(ap->a_vp); 1217 if (ap->a_dvp == ap->a_vp) 1218 vrele(ap->a_dvp); 1219 else 1220 vput(ap->a_dvp); 1221 1222 return error; 1223 } 1224 1225 int 1226 puffs_mkdir(void *v) 1227 { 1228 struct vop_mkdir_args /* { 1229 const struct vnodeop_desc *a_desc; 1230 struct vnode *a_dvp; 1231 struct vnode **a_vpp; 1232 struct componentname *a_cnp; 1233 struct vattr *a_vap; 1234 } */ *ap = v; 1235 int error; 1236 1237 PUFFS_VNREQ(mkdir); 1238 1239 puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp); 1240 mkdir_arg.pvnr_va = *ap->a_vap; 1241 1242 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR, 1243 &mkdir_arg, sizeof(mkdir_arg), 0, ap->a_dvp, NULL); 1244 if (error) 1245 goto out; 1246 1247 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1248 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1249 1250 out: 1251 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1252 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1253 vput(ap->a_dvp); 1254 return error; 1255 } 1256 1257 int 1258 puffs_rmdir(void *v) 1259 { 1260 struct vop_rmdir_args /* { 1261 const struct vnodeop_desc *a_desc; 1262 struct vnode *a_dvp; 1263 struct vnode *a_vp; 1264 struct componentname *a_cnp; 1265 } */ *ap = v; 1266 int error; 1267 1268 PUFFS_VNREQ(rmdir); 1269 1270 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1271 puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp); 1272 1273 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR, 1274 &rmdir_arg, sizeof(rmdir_arg), 0, ap->a_dvp, ap->a_vp); 1275 1276 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1277 1278 vput(ap->a_dvp); 1279 vput(ap->a_vp); 1280 1281 return error; 1282 } 1283 1284 int 1285 puffs_link(void *v) 1286 { 1287 struct vop_link_args /* { 1288 const struct vnodeop_desc *a_desc; 1289 struct vnode *a_dvp; 1290 struct vnode *a_vp; 1291 struct componentname *a_cnp; 1292 }*/ *ap = v; 1293 int error; 1294 1295 PUFFS_VNREQ(link); 1296 1297 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1298 puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp); 1299 1300 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK, 1301 &link_arg, sizeof(link_arg), 0, ap->a_dvp, ap->a_vp); 1302 1303 /* 1304 * XXX: stay in touch with the cache. I don't like this, but 1305 * don't have a better solution either. See also puffs_rename(). 1306 */ 1307 if (error == 0) 1308 puffs_updatenode(ap->a_vp, PUFFS_UPDATECTIME); 1309 1310 vput(ap->a_dvp); 1311 1312 return error; 1313 } 1314 1315 int 1316 puffs_symlink(void *v) 1317 { 1318 struct vop_symlink_args /* { 1319 const struct vnodeop_desc *a_desc; 1320 struct vnode *a_dvp; 1321 struct vnode **a_vpp; 1322 struct componentname *a_cnp; 1323 struct vattr *a_vap; 1324 char *a_target; 1325 }*/ *ap = v; 1326 int error; 1327 1328 PUFFS_VNREQ(symlink); /* XXX: large structure */ 1329 1330 *ap->a_vpp = NULL; 1331 1332 puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp); 1333 symlink_arg.pvnr_va = *ap->a_vap; 1334 (void)strlcpy(symlink_arg.pvnr_link, ap->a_target, 1335 sizeof(symlink_arg.pvnr_link)); 1336 1337 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), 1338 PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg), 0, 1339 ap->a_dvp, NULL); 1340 if (error) 1341 goto out; 1342 1343 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1344 symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0); 1345 1346 out: 1347 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1348 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1349 vput(ap->a_dvp); 1350 return error; 1351 } 1352 1353 int 1354 puffs_readlink(void *v) 1355 { 1356 struct vop_readlink_args /* { 1357 const struct vnodeop_desc *a_desc; 1358 struct vnode *a_vp; 1359 struct uio *a_uio; 1360 kauth_cred_t a_cred; 1361 } */ *ap = v; 1362 size_t linklen; 1363 int error; 1364 1365 PUFFS_VNREQ(readlink); 1366 1367 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1368 linklen = sizeof(readlink_arg.pvnr_link); 1369 readlink_arg.pvnr_linklen = linklen; 1370 1371 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1372 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 0, 1373 ap->a_vp, NULL); 1374 if (error) 1375 return error; 1376 1377 /* bad bad user file server */ 1378 if (readlink_arg.pvnr_linklen > linklen) 1379 return EINVAL; 1380 1381 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1382 ap->a_uio); 1383 } 1384 1385 /* XXXXXXX: think about locking & userspace op delocking... */ 1386 int 1387 puffs_rename(void *v) 1388 { 1389 struct vop_rename_args /* { 1390 const struct vnodeop_desc *a_desc; 1391 struct vnode *a_fdvp; 1392 struct vnode *a_fvp; 1393 struct componentname *a_fcnp; 1394 struct vnode *a_tdvp; 1395 struct vnode *a_tvp; 1396 struct componentname *a_tcnp; 1397 }*/ *ap = v; 1398 int error; 1399 1400 PUFFS_VNREQ(rename); 1401 1402 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) { 1403 error = EXDEV; 1404 goto out; 1405 } 1406 1407 rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1408 rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1409 if (ap->a_tvp) 1410 rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1411 else 1412 rename_arg.pvnr_cookie_targ = NULL; 1413 puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp); 1414 puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp); 1415 1416 error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount), 1417 PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg), 0, 1418 ap->a_fdvp, NULL); /* XXX */ 1419 1420 /* 1421 * XXX: stay in touch with the cache. I don't like this, but 1422 * don't have a better solution either. See also puffs_link(). 1423 */ 1424 if (error == 0) 1425 puffs_updatenode(ap->a_fvp, PUFFS_UPDATECTIME); 1426 1427 out: 1428 if (ap->a_tvp != NULL) 1429 vput(ap->a_tvp); 1430 if (ap->a_tdvp == ap->a_tvp) 1431 vrele(ap->a_tdvp); 1432 else 1433 vput(ap->a_tdvp); 1434 1435 vrele(ap->a_fdvp); 1436 vrele(ap->a_fvp); 1437 1438 return error; 1439 } 1440 1441 int 1442 puffs_read(void *v) 1443 { 1444 struct vop_read_args /* { 1445 const struct vnodeop_desc *a_desc; 1446 struct vnode *a_vp; 1447 struct uio *a_uio; 1448 int a_ioflag; 1449 kauth_cred_t a_cred; 1450 } */ *ap = v; 1451 struct puffs_vnreq_read *read_argp; 1452 struct puffs_mount *pmp; 1453 struct vnode *vp; 1454 struct uio *uio; 1455 void *win; 1456 size_t tomove, argsize; 1457 vsize_t bytelen; 1458 int error, ubcflags; 1459 1460 uio = ap->a_uio; 1461 vp = ap->a_vp; 1462 read_argp = NULL; 1463 error = 0; 1464 pmp = MPTOPUFFSMP(vp->v_mount); 1465 1466 /* std sanity */ 1467 if (uio->uio_resid == 0) 1468 return 0; 1469 if (uio->uio_offset < 0) 1470 return EINVAL; 1471 1472 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1473 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1474 1475 ubcflags = 0; 1476 if (UBC_WANT_UNMAP(vp)) 1477 ubcflags = UBC_UNMAP; 1478 1479 while (uio->uio_resid > 0) { 1480 bytelen = MIN(uio->uio_resid, 1481 vp->v_size - uio->uio_offset); 1482 if (bytelen == 0) 1483 break; 1484 1485 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1486 &bytelen, advice, UBC_READ); 1487 error = uiomove(win, bytelen, uio); 1488 ubc_release(win, ubcflags); 1489 if (error) 1490 break; 1491 } 1492 1493 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1494 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1495 } else { 1496 /* 1497 * in case it's not a regular file or we're operating 1498 * uncached, do read in the old-fashioned style, 1499 * i.e. explicit read operations 1500 */ 1501 1502 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1503 argsize = sizeof(struct puffs_vnreq_read); 1504 read_argp = malloc(argsize + tomove, 1505 M_PUFFS, M_WAITOK | M_ZERO); 1506 1507 error = 0; 1508 while (uio->uio_resid > 0) { 1509 read_argp->pvnr_ioflag = ap->a_ioflag; 1510 read_argp->pvnr_resid = tomove; 1511 read_argp->pvnr_offset = uio->uio_offset; 1512 puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred); 1513 1514 argsize = sizeof(struct puffs_vnreq_read); 1515 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1516 read_argp, argsize, tomove, 1517 ap->a_vp, NULL); 1518 if (error) 1519 break; 1520 1521 if (read_argp->pvnr_resid > tomove) { 1522 error = EINVAL; 1523 break; 1524 } 1525 1526 error = uiomove(read_argp->pvnr_data, 1527 tomove - read_argp->pvnr_resid, uio); 1528 1529 /* 1530 * in case the file is out of juice, resid from 1531 * userspace is != 0. and the error-case is 1532 * quite obvious 1533 */ 1534 if (error || read_argp->pvnr_resid) 1535 break; 1536 1537 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1538 } 1539 } 1540 1541 if (read_argp) 1542 free(read_argp, M_PUFFS); 1543 return error; 1544 } 1545 1546 int 1547 puffs_write(void *v) 1548 { 1549 struct vop_write_args /* { 1550 const struct vnodeop_desc *a_desc; 1551 struct vnode *a_vp; 1552 struct uio *a_uio; 1553 int a_ioflag; 1554 kauth_cred_t a_cred; 1555 } */ *ap = v; 1556 struct puffs_vnreq_write *write_argp; 1557 struct puffs_mount *pmp; 1558 struct uio *uio; 1559 struct vnode *vp; 1560 size_t tomove, argsize; 1561 off_t oldoff, newoff, origoff; 1562 vsize_t bytelen; 1563 int error, uflags; 1564 int ubcflags; 1565 1566 vp = ap->a_vp; 1567 uio = ap->a_uio; 1568 error = uflags = 0; 1569 write_argp = NULL; 1570 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1571 1572 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1573 ubcflags = UBC_WRITE | UBC_PARTIALOK; 1574 if (UBC_WANT_UNMAP(vp)) 1575 ubcflags = UBC_UNMAP; 1576 1577 /* 1578 * userspace *should* be allowed to control this, 1579 * but with UBC it's a bit unclear how to handle it 1580 */ 1581 if (ap->a_ioflag & IO_APPEND) 1582 uio->uio_offset = vp->v_size; 1583 1584 origoff = uio->uio_offset; 1585 while (uio->uio_resid > 0) { 1586 uflags |= PUFFS_UPDATECTIME; 1587 uflags |= PUFFS_UPDATEMTIME; 1588 oldoff = uio->uio_offset; 1589 bytelen = uio->uio_resid; 1590 1591 newoff = oldoff + bytelen; 1592 if (vp->v_size < newoff) { 1593 uvm_vnp_setwritesize(vp, newoff); 1594 } 1595 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1596 ubcflags); 1597 1598 /* 1599 * In case of a ubc_uiomove() error, 1600 * opt to not extend the file at all and 1601 * return an error. Otherwise, if we attempt 1602 * to clear the memory we couldn't fault to, 1603 * we might generate a kernel page fault. 1604 */ 1605 if (vp->v_size < newoff) { 1606 if (error == 0) { 1607 uflags |= PUFFS_UPDATESIZE; 1608 uvm_vnp_setsize(vp, newoff); 1609 } else { 1610 uvm_vnp_setwritesize(vp, vp->v_size); 1611 } 1612 } 1613 if (error) 1614 break; 1615 1616 /* 1617 * If we're writing large files, flush to file server 1618 * every 64k. Otherwise we can very easily exhaust 1619 * kernel and user memory, as the file server cannot 1620 * really keep up with our writing speed. 1621 * 1622 * Note: this does *NOT* honor MNT_ASYNC, because 1623 * that gives userland too much say in the kernel. 1624 */ 1625 if (oldoff >> 16 != uio->uio_offset >> 16) { 1626 simple_lock(&vp->v_interlock); 1627 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1628 uio->uio_offset & ~0xffff, 1629 PGO_CLEANIT | PGO_SYNCIO); 1630 if (error) 1631 break; 1632 } 1633 } 1634 1635 /* synchronous I/O? */ 1636 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1637 simple_lock(&vp->v_interlock); 1638 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1639 round_page(uio->uio_offset), 1640 PGO_CLEANIT | PGO_SYNCIO); 1641 1642 /* write though page cache? */ 1643 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1644 simple_lock(&vp->v_interlock); 1645 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1646 round_page(uio->uio_offset), PGO_CLEANIT); 1647 } 1648 1649 puffs_updatenode(vp, uflags); 1650 } else { 1651 /* tomove is non-increasing */ 1652 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1653 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1654 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1655 1656 while (uio->uio_resid > 0) { 1657 write_argp->pvnr_ioflag = ap->a_ioflag; 1658 write_argp->pvnr_resid = tomove; 1659 write_argp->pvnr_offset = uio->uio_offset; 1660 puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred); 1661 error = uiomove(write_argp->pvnr_data, tomove, uio); 1662 if (error) 1663 break; 1664 1665 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1666 PUFFS_VN_WRITE, write_argp, argsize, 0, 1667 ap->a_vp, NULL); 1668 if (error) { 1669 /* restore uiomove */ 1670 uio->uio_resid += tomove; 1671 uio->uio_offset -= tomove; 1672 break; 1673 } 1674 if (write_argp->pvnr_resid > tomove) { 1675 /* 1676 * XXX: correct file size is a mystery, 1677 * we can only guess 1678 */ 1679 error = EINVAL; 1680 break; 1681 } 1682 1683 /* adjust file size */ 1684 if (vp->v_size < uio->uio_offset) 1685 uvm_vnp_setsize(vp, uio->uio_offset); 1686 1687 /* didn't move everything? bad userspace. bail */ 1688 if (write_argp->pvnr_resid != 0) { 1689 uio->uio_resid += write_argp->pvnr_resid; 1690 uio->uio_offset -= write_argp->pvnr_resid; 1691 error = EIO; 1692 break; 1693 } 1694 1695 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1696 } 1697 } 1698 1699 if (write_argp) 1700 free(write_argp, M_PUFFS); 1701 return error; 1702 } 1703 1704 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1705 1706 #define FCNIOCTL_ARG_MAX 1<<16 1707 int 1708 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1709 { 1710 1711 /* currently not supported */ 1712 return EOPNOTSUPP; 1713 #if 0 1714 /* struct vop_ioctl_args { 1715 const struct vnodeop_desc *a_desc; 1716 struct vnode *a_vp; 1717 u_long a_command; 1718 void *a_data; 1719 int a_fflag; 1720 kauth_cred_t a_cred; 1721 struct lwp *a_l; 1722 }*ap = v; */ 1723 struct puffs_mount *pmp; 1724 struct puffs_sizepark pspark; 1725 void *kernbuf; 1726 size_t copylen; 1727 int error; 1728 1729 PUFFS_VNREQ(fcnioctl); 1730 1731 /* 1732 * Since this op gives the filesystem (almost) complete control on 1733 * how much it is allowed to copy from the calling process 1734 * address space, do not enable it by default, since it would 1735 * be a whopping security hole. 1736 */ 1737 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1738 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1739 return EINVAL; /* only shoe that fits */ 1740 1741 /* fill in sizereq and store it */ 1742 pspark.pkso_reqid = puffs_getreqid(pmp); 1743 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1744 pspark.pkso_copybuf = ap->a_data; 1745 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1746 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1747 1748 /* then fill in actual request and shoot it off */ 1749 fcnioctl_arg.pvnr_command = ap->a_command; 1750 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1751 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1752 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1753 1754 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1755 &fcnioctl_arg, sizeof(fcnioctl_arg), 0, ap->a_vp, 1756 pspark.pkso_reqid, ap->a_vp, NULL); 1757 1758 /* if we don't need to copy data, we're done */ 1759 if (error || !fcnioctl_arg.pvnr_copyback) 1760 return error; 1761 1762 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1763 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1764 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1765 if (error) 1766 goto out; 1767 error = copyout(kernbuf, ap->a_data, copylen); 1768 1769 out: 1770 free(kernbuf, M_PUFFS); 1771 return error; 1772 #endif 1773 } 1774 1775 int 1776 puffs_ioctl(void *v) 1777 { 1778 1779 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1780 } 1781 1782 int 1783 puffs_fcntl(void *v) 1784 { 1785 1786 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1787 } 1788 1789 int 1790 puffs_print(void *v) 1791 { 1792 struct vop_print_args /* { 1793 struct vnode *a_vp; 1794 } */ *ap = v; 1795 struct puffs_mount *pmp; 1796 struct vnode *vp = ap->a_vp; 1797 struct puffs_node *pn = vp->v_data; 1798 1799 PUFFS_VNREQ(print); 1800 1801 pmp = MPTOPUFFSMP(vp->v_mount); 1802 1803 /* kernel portion */ 1804 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1805 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1806 if (vp->v_type == VFIFO) 1807 fifo_printinfo(vp); 1808 lockmgr_printinfo(&vp->v_lock); 1809 1810 /* userspace portion */ 1811 if (EXISTSOP(pmp, PRINT)) 1812 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1813 &print_arg, sizeof(print_arg), 0, ap->a_vp, NULL); 1814 1815 return 0; 1816 } 1817 1818 int 1819 puffs_pathconf(void *v) 1820 { 1821 struct vop_pathconf_args /* { 1822 const struct vnodeop_desc *a_desc; 1823 struct vnode *a_vp; 1824 int a_name; 1825 register_t *a_retval; 1826 } */ *ap = v; 1827 int error; 1828 1829 PUFFS_VNREQ(pathconf); 1830 1831 pathconf_arg.pvnr_name = ap->a_name; 1832 1833 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1834 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 0, 1835 ap->a_vp, NULL); 1836 if (error) 1837 return error; 1838 1839 *ap->a_retval = pathconf_arg.pvnr_retval; 1840 1841 return 0; 1842 } 1843 1844 int 1845 puffs_advlock(void *v) 1846 { 1847 struct vop_advlock_args /* { 1848 const struct vnodeop_desc *a_desc; 1849 struct vnode *a_vp; 1850 void *a_id; 1851 int a_op; 1852 struct flock *a_fl; 1853 int a_flags; 1854 } */ *ap = v; 1855 int error; 1856 1857 PUFFS_VNREQ(advlock); 1858 1859 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1860 if (error) 1861 return error; 1862 advlock_arg.pvnr_id = ap->a_id; 1863 advlock_arg.pvnr_op = ap->a_op; 1864 advlock_arg.pvnr_flags = ap->a_flags; 1865 1866 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1867 &advlock_arg, sizeof(advlock_arg), 0, ap->a_vp, NULL); 1868 } 1869 /* 1870 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1871 */ 1872 int 1873 puffs_strategy(void *v) 1874 { 1875 struct vop_strategy_args /* { 1876 const struct vnodeop_desc *a_desc; 1877 struct vnode *a_vp; 1878 struct buf *a_bp; 1879 } */ *ap = v; 1880 struct puffs_mount *pmp; 1881 struct vnode *vp = ap->a_vp; 1882 struct puffs_node *pn; 1883 struct puffs_vnreq_read *read_argp = NULL; 1884 struct puffs_vnreq_write *write_argp = NULL; 1885 struct buf *bp; 1886 size_t argsize; 1887 size_t tomove, moved; 1888 int error, dowritefaf; 1889 1890 pmp = MPTOPUFFSMP(vp->v_mount); 1891 bp = ap->a_bp; 1892 error = 0; 1893 dowritefaf = 0; 1894 pn = VPTOPP(vp); 1895 1896 if (((bp->b_flags & B_READ) && !EXISTSOP(pmp, READ)) 1897 || (((bp->b_flags & B_READ) == 0) && !EXISTSOP(pmp, WRITE))) { 1898 error = EOPNOTSUPP; 1899 goto out; 1900 } 1901 1902 /* 1903 * Short-circuit optimization: don't flush buffer in between 1904 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 1905 */ 1906 if (pn->pn_stat & PNODE_DYING) { 1907 KASSERT((bp->b_flags & B_READ) == 0); 1908 bp->b_resid = 0; 1909 goto out; 1910 } 1911 1912 #ifdef DIAGNOSTIC 1913 if (bp->b_bcount > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1914 panic("puffs_strategy: wildly inappropriate buf bcount %d", 1915 bp->b_bcount); 1916 #endif 1917 1918 /* 1919 * See explanation for the necessity of a FAF in puffs_fsync. 1920 * 1921 * Also, do FAF in case we're suspending. 1922 * See puffs_vfsops.c:pageflush() 1923 * 1924 * XXgoddamnX: B_WRITE is a "pseudo flag" 1925 */ 1926 if ((bp->b_flags & B_READ) == 0) { 1927 simple_lock(&vp->v_interlock); 1928 if (vp->v_flag & VXLOCK) 1929 dowritefaf = 1; 1930 if (pn->pn_stat & PNODE_SUSPEND) 1931 dowritefaf = 1; 1932 simple_unlock(&vp->v_interlock); 1933 } 1934 1935 if (bp->b_flags & B_ASYNC) 1936 dowritefaf = 1; 1937 1938 #ifdef DIAGNOSTIC 1939 if (curproc == uvm.pagedaemon_proc) 1940 KASSERT(dowritefaf); 1941 #endif 1942 1943 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 1944 1945 if ((bp->b_flags & (B_READ | B_ASYNC)) == (B_READ | B_ASYNC)) { 1946 argsize = sizeof(struct puffs_vnreq_read); 1947 read_argp = malloc(argsize + tomove, 1948 M_PUFFS, M_NOWAIT | M_ZERO); 1949 if (read_argp == NULL) { 1950 error = ENOMEM; 1951 goto out; 1952 } 1953 1954 read_argp->pvnr_ioflag = 0; 1955 read_argp->pvnr_resid = tomove; 1956 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1957 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1958 1959 puffs_vntouser_call(pmp, PUFFS_VN_READ, read_argp, 1960 argsize, tomove, puffs_parkdone_asyncbioread, bp, vp, NULL); 1961 error = 0; 1962 goto wayout; 1963 } else if (bp->b_flags & B_READ) { 1964 argsize = sizeof(struct puffs_vnreq_read); 1965 read_argp = malloc(argsize + tomove, 1966 M_PUFFS, M_WAITOK | M_ZERO); 1967 1968 read_argp->pvnr_ioflag = 0; 1969 read_argp->pvnr_resid = tomove; 1970 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1971 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1972 1973 error = puffs_vntouser(pmp, PUFFS_VN_READ, 1974 read_argp, argsize, tomove, vp, NULL); 1975 1976 if (error) 1977 goto out; 1978 1979 if (read_argp->pvnr_resid > tomove) { 1980 error = EINVAL; 1981 goto out; 1982 } 1983 1984 moved = tomove - read_argp->pvnr_resid; 1985 1986 (void)memcpy(bp->b_data, read_argp->pvnr_data, moved); 1987 bp->b_resid = bp->b_bcount - moved; 1988 } else { 1989 /* 1990 * make pages read-only before we write them if we want 1991 * write caching info 1992 */ 1993 if (PUFFS_WCACHEINFO(pmp)) { 1994 struct uvm_object *uobj = &vp->v_uobj; 1995 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 1996 struct vm_page *vmp; 1997 int i; 1998 1999 for (i = 0; i < npages; i++) { 2000 vmp= uvm_pageratop((vaddr_t)bp->b_data 2001 + (i << PAGE_SHIFT)); 2002 DPRINTF(("puffs_strategy: write-protecting " 2003 "vp %p page %p, offset %" PRId64"\n", 2004 vp, vmp, vmp->offset)); 2005 simple_lock(&uobj->vmobjlock); 2006 vmp->flags |= PG_RDONLY; 2007 pmap_page_protect(vmp, VM_PROT_READ); 2008 simple_unlock(&uobj->vmobjlock); 2009 } 2010 } 2011 2012 argsize = sizeof(struct puffs_vnreq_write) + bp->b_bcount; 2013 write_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 2014 if (write_argp == NULL) { 2015 error = ENOMEM; 2016 goto out; 2017 } 2018 2019 write_argp->pvnr_ioflag = 0; 2020 write_argp->pvnr_resid = tomove; 2021 write_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 2022 puffs_credcvt(&write_argp->pvnr_cred, FSCRED); 2023 2024 (void)memcpy(&write_argp->pvnr_data, bp->b_data, tomove); 2025 2026 if (dowritefaf) { 2027 /* 2028 * assume FAF moves everything. frankly, we don't 2029 * really have a choice. 2030 */ 2031 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 2032 PUFFS_VN_WRITE, write_argp, argsize, vp); 2033 bp->b_resid = bp->b_bcount - tomove; 2034 } else { 2035 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 2036 PUFFS_VN_WRITE, write_argp, argsize, 0, vp, NULL); 2037 if (error) 2038 goto out; 2039 2040 moved = tomove - write_argp->pvnr_resid; 2041 if (write_argp->pvnr_resid > tomove) { 2042 error = EINVAL; 2043 goto out; 2044 } 2045 2046 bp->b_resid = bp->b_bcount - moved; 2047 if (write_argp->pvnr_resid != 0) 2048 error = EIO; 2049 } 2050 } 2051 2052 out: 2053 if (read_argp) 2054 free(read_argp, M_PUFFS); 2055 if (write_argp && !dowritefaf) 2056 free(write_argp, M_PUFFS); 2057 2058 if (error) { 2059 bp->b_error = error; 2060 bp->b_flags |= B_ERROR; 2061 } 2062 2063 if (error || ((bp->b_flags & (B_READ | B_ASYNC)) != (B_READ | B_ASYNC))) 2064 biodone(bp); 2065 wayout: 2066 return error; 2067 } 2068 2069 int 2070 puffs_mmap(void *v) 2071 { 2072 struct vop_mmap_args /* { 2073 const struct vnodeop_desc *a_desc; 2074 struct vnode *a_vp; 2075 int a_fflags; 2076 kauth_cred_t a_cred; 2077 struct lwp *a_l; 2078 } */ *ap = v; 2079 struct puffs_mount *pmp; 2080 int error; 2081 2082 PUFFS_VNREQ(mmap); 2083 2084 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2085 2086 if (!PUFFS_DOCACHE(pmp)) 2087 return genfs_eopnotsupp(v); 2088 2089 if (EXISTSOP(pmp, MMAP)) { 2090 mmap_arg.pvnr_fflags = ap->a_fflags; 2091 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 2092 mmap_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 2093 2094 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 2095 &mmap_arg, sizeof(mmap_arg), 0, 2096 ap->a_vp, NULL); 2097 } else { 2098 error = genfs_mmap(v); 2099 } 2100 2101 return error; 2102 } 2103 2104 2105 /* 2106 * The rest don't get a free trip to userspace and back, they 2107 * have to stay within the kernel. 2108 */ 2109 2110 /* 2111 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2112 * well, maybe somehow, somewhere, some day .... 2113 */ 2114 int 2115 puffs_bmap(void *v) 2116 { 2117 struct vop_bmap_args /* { 2118 const struct vnodeop_desc *a_desc; 2119 struct vnode *a_vp; 2120 daddr_t a_bn; 2121 struct vnode **a_vpp; 2122 daddr_t *a_bnp; 2123 int *a_runp; 2124 } */ *ap = v; 2125 struct puffs_mount *pmp; 2126 2127 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2128 2129 if (ap->a_vpp) 2130 *ap->a_vpp = ap->a_vp; 2131 if (ap->a_bnp) 2132 *ap->a_bnp = ap->a_bn; 2133 if (ap->a_runp) 2134 *ap->a_runp 2135 = (PUFFS_TOMOVE(pmp->pmp_req_maxsize, pmp)>>DEV_BSHIFT) - 1; 2136 2137 return 0; 2138 } 2139 2140 /* 2141 * Handle getpages faults in puffs. We let genfs_getpages() do most 2142 * of the dirty work, but we come in this route to do accounting tasks. 2143 * If the user server has specified functions for cache notifications 2144 * about reads and/or writes, we record which type of operation we got, 2145 * for which page range, and proceed to issue a FAF notification to the 2146 * server about it. 2147 */ 2148 int 2149 puffs_getpages(void *v) 2150 { 2151 struct vop_getpages_args /* { 2152 const struct vnodeop_desc *a_desc; 2153 struct vnode *a_vp; 2154 voff_t a_offset; 2155 struct vm_page **a_m; 2156 int *a_count; 2157 int a_centeridx; 2158 vm_prot_t a_access_type; 2159 int a_advice; 2160 int a_flags; 2161 } */ *ap = v; 2162 struct puffs_mount *pmp; 2163 struct vnode *vp; 2164 struct vm_page **pgs; 2165 struct puffs_cacheinfo *pcinfo = NULL; 2166 struct puffs_cacherun *pcrun; 2167 void *parkmem = NULL; 2168 size_t runsizes; 2169 int i, npages, si, streakon; 2170 int error, locked, write; 2171 2172 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2173 npages = *ap->a_count; 2174 pgs = ap->a_m; 2175 vp = ap->a_vp; 2176 locked = (ap->a_flags & PGO_LOCKED) != 0; 2177 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2178 2179 /* ccg xnaht - gets Wuninitialized wrong */ 2180 pcrun = NULL; 2181 runsizes = 0; 2182 2183 if (write && PUFFS_WCACHEINFO(pmp)) { 2184 /* allocate worst-case memory */ 2185 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2186 pcinfo = malloc(sizeof(struct puffs_cacheinfo) + runsizes, 2187 M_PUFFS, M_ZERO | locked ? M_NOWAIT : M_WAITOK); 2188 2189 /* 2190 * can't block if we're locked and can't mess up caching 2191 * information for fs server. so come back later, please 2192 */ 2193 if (pcinfo == NULL) { 2194 error = ENOMEM; 2195 goto out; 2196 } 2197 2198 parkmem = puffs_park_alloc(locked == 0); 2199 if (parkmem == NULL) { 2200 error = ENOMEM; 2201 goto out; 2202 } 2203 2204 pcrun = pcinfo->pcache_runs; 2205 } 2206 2207 error = genfs_getpages(v); 2208 if (error) 2209 goto out; 2210 2211 if (PUFFS_WCACHEINFO(pmp) == 0) 2212 goto out; 2213 2214 /* 2215 * Let's see whose fault it was and inform the user server of 2216 * possibly read/written pages. Map pages from read faults 2217 * strictly read-only, since otherwise we might miss info on 2218 * when the page is actually write-faulted to. 2219 */ 2220 if (!locked) 2221 simple_lock(&vp->v_uobj.vmobjlock); 2222 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2223 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2224 if (streakon && write) { 2225 streakon = 0; 2226 pcrun[si].pcache_runend 2227 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2228 si++; 2229 } 2230 continue; 2231 } 2232 if (streakon == 0 && write) { 2233 streakon = 1; 2234 pcrun[si].pcache_runstart = pgs[i]->offset; 2235 } 2236 2237 if (!write) 2238 pgs[i]->flags |= PG_RDONLY; 2239 } 2240 /* was the last page part of our streak? */ 2241 if (streakon) { 2242 pcrun[si].pcache_runend 2243 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2244 si++; 2245 } 2246 if (!locked) 2247 simple_unlock(&vp->v_uobj.vmobjlock); 2248 2249 KASSERT(si <= (npages / 2) + 1); 2250 2251 /* send results to userspace */ 2252 if (write) 2253 puffs_cacheop(pmp, parkmem, pcinfo, 2254 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2255 2256 out: 2257 if (error) { 2258 if (pcinfo != NULL) 2259 free(pcinfo, M_PUFFS); 2260 if (parkmem != NULL) 2261 puffs_park_release(parkmem, 1); 2262 } 2263 2264 return error; 2265 } 2266 2267 int 2268 puffs_lock(void *v) 2269 { 2270 struct vop_lock_args /* { 2271 struct vnode *a_vp; 2272 int a_flags; 2273 }*/ *ap = v; 2274 struct vnode *vp = ap->a_vp; 2275 struct mount *mp = vp->v_mount; 2276 2277 #if 0 2278 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2279 #endif 2280 2281 /* 2282 * XXX: this avoids deadlocking when we're suspending. 2283 * e.g. some ops holding the vnode lock might be blocked for 2284 * the vfs transaction lock so we'd deadlock. 2285 * 2286 * Now once again this is skating on the thin ice of modern life, 2287 * since we are breaking the consistency guarantee provided 2288 * _to the user server_ by vnode locking. Hopefully this will 2289 * get fixed soon enough by getting rid of the dependency on 2290 * vnode locks alltogether. 2291 */ 2292 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2293 if (ap->a_flags & LK_INTERLOCK) 2294 simple_unlock(&vp->v_interlock); 2295 return 0; 2296 } 2297 2298 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2299 } 2300 2301 int 2302 puffs_unlock(void *v) 2303 { 2304 struct vop_unlock_args /* { 2305 struct vnode *a_vp; 2306 int a_flags; 2307 } */ *ap = v; 2308 struct vnode *vp = ap->a_vp; 2309 struct mount *mp = vp->v_mount; 2310 2311 #if 0 2312 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2313 #endif 2314 2315 /* XXX: see puffs_lock() */ 2316 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2317 if (ap->a_flags & LK_INTERLOCK) 2318 simple_unlock(&vp->v_interlock); 2319 return 0; 2320 } 2321 2322 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2323 } 2324 2325 int 2326 puffs_islocked(void *v) 2327 { 2328 struct vop_islocked_args *ap = v; 2329 int rv; 2330 2331 rv = lockstatus(&ap->a_vp->v_lock); 2332 return rv; 2333 } 2334 2335 int 2336 puffs_generic(void *v) 2337 { 2338 struct vop_generic_args *ap = v; 2339 2340 (void)ap; 2341 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2342 2343 return EOPNOTSUPP; 2344 } 2345 2346 2347 /* 2348 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2349 * FAF update information for the puffs node first. 2350 */ 2351 int 2352 puffs_spec_read(void *v) 2353 { 2354 struct vop_read_args /* { 2355 const struct vnodeop_desc *a_desc; 2356 struct vnode *a_vp; 2357 struct uio *a_uio; 2358 int a_ioflag; 2359 kauth_cred_t a_cred; 2360 } */ *ap = v; 2361 2362 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2363 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2364 } 2365 2366 int 2367 puffs_spec_write(void *v) 2368 { 2369 struct vop_write_args /* { 2370 const struct vnodeop_desc *a_desc; 2371 struct vnode *a_vp; 2372 struct uio *a_uio; 2373 int a_ioflag; 2374 kauth_cred_t a_cred; 2375 }*/ *ap = v; 2376 2377 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2378 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2379 } 2380 2381 int 2382 puffs_fifo_read(void *v) 2383 { 2384 struct vop_read_args /* { 2385 const struct vnodeop_desc *a_desc; 2386 struct vnode *a_vp; 2387 struct uio *a_uio; 2388 int a_ioflag; 2389 kauth_cred_t a_cred; 2390 } */ *ap = v; 2391 2392 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2393 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2394 } 2395 2396 int 2397 puffs_fifo_write(void *v) 2398 { 2399 struct vop_write_args /* { 2400 const struct vnodeop_desc *a_desc; 2401 struct vnode *a_vp; 2402 struct uio *a_uio; 2403 int a_ioflag; 2404 kauth_cred_t a_cred; 2405 }*/ *ap = v; 2406 2407 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2408 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2409 } 2410
Indexes created Mon Sep 29 21:09:56 GMT 2025