puffs_vnops.c revision 1.46
1 /* $NetBSD: puffs_vnops.c,v 1.46 2007/02/08 05:09:25 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006 Antti Kantee. All Rights Reserved. 5 * 6 * Development of this software was supported by the 7 * Google Summer of Code program and the Ulla Tuominen Foundation. 8 * The Google SoC project was mentored by Bill Studenmund. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the company nor the name of the author may be used to 19 * endorse or promote products derived from this software without specific 20 * prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 23 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 25 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.46 2007/02/08 05:09:25 pooka Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/fstrans.h> 40 #include <sys/malloc.h> 41 #include <sys/mount.h> 42 #include <sys/namei.h> 43 #include <sys/vnode.h> 44 #include <uvm/uvm.h> 45 46 #include <fs/puffs/puffs_msgif.h> 47 #include <fs/puffs/puffs_sys.h> 48 49 #include <miscfs/fifofs/fifo.h> 50 #include <miscfs/genfs/genfs.h> 51 #include <miscfs/specfs/specdev.h> 52 53 int puffs_lookup(void *); 54 int puffs_create(void *); 55 int puffs_access(void *); 56 int puffs_mknod(void *); 57 int puffs_open(void *); 58 int puffs_close(void *); 59 int puffs_getattr(void *); 60 int puffs_setattr(void *); 61 int puffs_reclaim(void *); 62 int puffs_readdir(void *); 63 int puffs_poll(void *); 64 int puffs_fsync(void *); 65 int puffs_seek(void *); 66 int puffs_remove(void *); 67 int puffs_mkdir(void *); 68 int puffs_rmdir(void *); 69 int puffs_link(void *); 70 int puffs_readlink(void *); 71 int puffs_symlink(void *); 72 int puffs_rename(void *); 73 int puffs_read(void *); 74 int puffs_write(void *); 75 int puffs_fcntl(void *); 76 int puffs_ioctl(void *); 77 int puffs_inactive(void *); 78 int puffs_print(void *); 79 int puffs_pathconf(void *); 80 int puffs_advlock(void *); 81 int puffs_strategy(void *); 82 int puffs_bmap(void *); 83 int puffs_mmap(void *); 84 85 int puffs_spec_read(void *); 86 int puffs_spec_write(void *); 87 int puffs_fifo_read(void *); 88 int puffs_fifo_write(void *); 89 90 int puffs_checkop(void *); 91 92 93 /* VOP_LEASE() not included */ 94 95 int puffs_generic(void *); 96 97 #if 0 98 #define puffs_lock genfs_lock 99 #define puffs_unlock genfs_unlock 100 #define puffs_islocked genfs_islocked 101 #else 102 int puffs_lock(void *); 103 int puffs_unlock(void *); 104 int puffs_islocked(void *); 105 #endif 106 107 int (**puffs_vnodeop_p)(void *); 108 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 109 { &vop_default_desc, vn_default_error }, 110 { &vop_lookup_desc, puffs_lookup }, /* REAL lookup */ 111 { &vop_create_desc, puffs_checkop }, /* create */ 112 { &vop_mknod_desc, puffs_checkop }, /* mknod */ 113 { &vop_open_desc, puffs_checkop }, /* open */ 114 { &vop_close_desc, puffs_checkop }, /* close */ 115 { &vop_access_desc, puffs_checkop }, /* access */ 116 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 117 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 118 { &vop_read_desc, puffs_checkop }, /* read */ 119 { &vop_write_desc, puffs_checkop }, /* write */ 120 { &vop_fcntl_desc, puffs_checkop }, /* fcntl */ 121 { &vop_ioctl_desc, puffs_checkop }, /* ioctl */ 122 { &vop_fsync_desc, puffs_fsync }, /* REAL fsync */ 123 { &vop_seek_desc, puffs_checkop }, /* seek */ 124 { &vop_remove_desc, puffs_checkop }, /* remove */ 125 { &vop_link_desc, puffs_checkop }, /* link */ 126 { &vop_rename_desc, puffs_checkop }, /* rename */ 127 { &vop_mkdir_desc, puffs_checkop }, /* mkdir */ 128 { &vop_rmdir_desc, puffs_checkop }, /* rmdir */ 129 { &vop_symlink_desc, puffs_checkop }, /* symlink */ 130 { &vop_readdir_desc, puffs_checkop }, /* readdir */ 131 { &vop_readlink_desc, puffs_checkop }, /* readlink */ 132 { &vop_getpages_desc, puffs_checkop }, /* getpages */ 133 { &vop_putpages_desc, puffs_checkop }, /* putpages */ 134 { &vop_pathconf_desc, puffs_checkop }, /* pathconf */ 135 { &vop_advlock_desc, puffs_checkop }, /* advlock */ 136 { &vop_strategy_desc, puffs_strategy }, /* REAL strategy */ 137 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 138 { &vop_abortop_desc, genfs_abortop }, /* REAL abortop */ 139 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 140 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 141 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 142 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 143 { &vop_bmap_desc, puffs_bmap }, /* REAL bmap */ 144 { &vop_print_desc, puffs_print }, /* REAL print */ 145 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 146 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 147 { &vop_mmap_desc, puffs_mmap }, /* REAL mmap */ 148 149 { &vop_poll_desc, genfs_eopnotsupp }, /* poll XXX */ 150 { &vop_poll_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 151 { NULL, NULL } 152 }; 153 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 154 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 155 156 157 int (**puffs_specop_p)(void *); 158 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 159 { &vop_default_desc, vn_default_error }, 160 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 161 { &vop_create_desc, spec_create }, /* genfs_badop */ 162 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 163 { &vop_open_desc, spec_open }, /* spec_open */ 164 { &vop_close_desc, spec_close }, /* spec_close */ 165 { &vop_access_desc, puffs_checkop }, /* access */ 166 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 167 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 168 { &vop_read_desc, puffs_spec_read }, /* update, read */ 169 { &vop_write_desc, puffs_spec_write }, /* update, write */ 170 { &vop_lease_desc, spec_lease_check }, /* genfs_nullop */ 171 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 172 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 173 { &vop_poll_desc, spec_poll }, /* spec_poll */ 174 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 175 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 176 { &vop_mmap_desc, spec_mmap }, /* genfs_mmap (dummy) */ 177 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 178 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 179 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 180 { &vop_link_desc, spec_link }, /* genfs_badop */ 181 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 182 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 183 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 184 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 185 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 186 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 187 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 188 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 189 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 190 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 191 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 192 { &vop_bmap_desc, spec_bmap }, /* dummy */ 193 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 194 { &vop_print_desc, puffs_print }, /* REAL print */ 195 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 196 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 197 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 198 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 199 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 200 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 201 #if 0 202 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 203 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 204 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 205 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 206 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 207 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 208 #endif 209 { NULL, NULL } 210 }; 211 const struct vnodeopv_desc puffs_specop_opv_desc = 212 { &puffs_specop_p, puffs_specop_entries }; 213 214 215 int (**puffs_fifoop_p)(void *); 216 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 217 { &vop_default_desc, vn_default_error }, 218 { &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */ 219 { &vop_create_desc, fifo_create }, /* genfs_badop */ 220 { &vop_mknod_desc, fifo_mknod }, /* genfs_badop */ 221 { &vop_open_desc, fifo_open }, /* open */ 222 { &vop_close_desc, fifo_close }, /* close */ 223 { &vop_access_desc, puffs_checkop }, /* access */ 224 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 225 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 226 { &vop_read_desc, puffs_fifo_read }, /* read, update */ 227 { &vop_write_desc, puffs_fifo_write }, /* write, update */ 228 { &vop_lease_desc, fifo_lease_check }, /* genfs_nullop */ 229 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 230 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 231 { &vop_poll_desc, fifo_poll }, /* poll */ 232 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 233 { &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */ 234 { &vop_mmap_desc, fifo_mmap }, /* genfs_badop */ 235 { &vop_fsync_desc, fifo_fsync }, /* genfs_nullop*/ 236 { &vop_seek_desc, fifo_seek }, /* genfs_badop */ 237 { &vop_remove_desc, fifo_remove }, /* genfs_badop */ 238 { &vop_link_desc, fifo_link }, /* genfs_badop */ 239 { &vop_rename_desc, fifo_rename }, /* genfs_badop */ 240 { &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */ 241 { &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */ 242 { &vop_symlink_desc, fifo_symlink }, /* genfs_badop */ 243 { &vop_readdir_desc, fifo_readdir }, /* genfs_badop */ 244 { &vop_readlink_desc, fifo_readlink }, /* genfs_badop */ 245 { &vop_abortop_desc, fifo_abortop }, /* genfs_badop */ 246 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 247 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 248 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 249 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 250 { &vop_bmap_desc, fifo_bmap }, /* dummy */ 251 { &vop_strategy_desc, fifo_strategy }, /* genfs_badop */ 252 { &vop_print_desc, puffs_print }, /* REAL print */ 253 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 254 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 255 { &vop_advlock_desc, fifo_advlock }, /* genfs_einval */ 256 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 257 { &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/ 258 #if 0 259 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 260 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 261 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 262 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 263 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 264 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 265 #endif 266 { NULL, NULL } 267 }; 268 const struct vnodeopv_desc puffs_fifoop_opv_desc = 269 { &puffs_fifoop_p, puffs_fifoop_entries }; 270 271 272 /* "real" vnode operations */ 273 int (**puffs_msgop_p)(void *); 274 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 275 { &vop_default_desc, vn_default_error }, 276 { &vop_create_desc, puffs_create }, /* create */ 277 { &vop_mknod_desc, puffs_mknod }, /* mknod */ 278 { &vop_open_desc, puffs_open }, /* open */ 279 { &vop_close_desc, puffs_close }, /* close */ 280 { &vop_access_desc, puffs_access }, /* access */ 281 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 282 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 283 { &vop_read_desc, puffs_read }, /* read */ 284 { &vop_write_desc, puffs_write }, /* write */ 285 { &vop_fcntl_desc, puffs_fcntl }, /* fcntl */ 286 { &vop_ioctl_desc, puffs_ioctl }, /* ioctl */ 287 { &vop_fsync_desc, puffs_fsync }, /* fsync */ 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, genfs_getpages }, /* getpages */ 302 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 303 { NULL, NULL } 304 }; 305 const struct vnodeopv_desc puffs_msgop_opv_desc = 306 { &puffs_msgop_p, puffs_msgop_entries }; 307 308 309 #define LOCKEDVP(a) (VOP_ISLOCKED(a) ? (a) : NULL) 310 311 312 /* 313 * This is a generic vnode operation handler. It checks if the necessary 314 * operations for the called vnode operation are implemented by userspace 315 * and either returns a dummy return value or proceeds to call the real 316 * vnode operation from puffs_msgop_v. 317 * 318 * XXX: this should described elsewhere and autogenerated, the complexity 319 * of the vnode operations vectors and their interrelationships is also 320 * getting a bit out of hand. Another problem is that we need this same 321 * information in the fs server code, so keeping the two in sync manually 322 * is not a viable (long term) plan. 323 */ 324 325 /* not supported, handle locking protocol */ 326 #define CHECKOP_NOTSUPP(op) \ 327 case VOP_##op##_DESCOFFSET: \ 328 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 329 return genfs_eopnotsupp(v); \ 330 break 331 332 /* always succeed, no locking */ 333 #define CHECKOP_SUCCESS(op) \ 334 case VOP_##op##_DESCOFFSET: \ 335 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 336 return 0; \ 337 break 338 339 int 340 puffs_checkop(void *v) 341 { 342 struct vop_generic_args /* { 343 struct vnodeop_desc *a_desc; 344 spooky mystery contents; 345 } */ *ap = v; 346 struct vnodeop_desc *desc = ap->a_desc; 347 struct puffs_mount *pmp; 348 struct vnode *vp; 349 int offset; 350 351 DPRINTF_VERBOSE(("checkop call %s (%d)\n", 352 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset)); 353 354 offset = ap->a_desc->vdesc_vp_offsets[0]; 355 #ifdef DIAGNOSTIC 356 if (offset == VDESC_NO_OFFSET) 357 panic("puffs_checkop: no vnode, why did you call me?"); 358 #endif 359 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 360 pmp = MPTOPUFFSMP(vp->v_mount); 361 362 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOPS) == 0) { 363 switch (desc->vdesc_offset) { 364 CHECKOP_NOTSUPP(CREATE); 365 CHECKOP_NOTSUPP(MKNOD); 366 CHECKOP_NOTSUPP(GETATTR); 367 CHECKOP_NOTSUPP(SETATTR); 368 CHECKOP_NOTSUPP(READ); 369 CHECKOP_NOTSUPP(WRITE); 370 CHECKOP_NOTSUPP(FCNTL); 371 CHECKOP_NOTSUPP(IOCTL); 372 CHECKOP_NOTSUPP(REMOVE); 373 CHECKOP_NOTSUPP(LINK); 374 CHECKOP_NOTSUPP(RENAME); 375 CHECKOP_NOTSUPP(MKDIR); 376 CHECKOP_NOTSUPP(RMDIR); 377 CHECKOP_NOTSUPP(SYMLINK); 378 CHECKOP_NOTSUPP(READDIR); 379 CHECKOP_NOTSUPP(READLINK); 380 CHECKOP_NOTSUPP(PRINT); 381 CHECKOP_NOTSUPP(PATHCONF); 382 CHECKOP_NOTSUPP(ADVLOCK); 383 384 CHECKOP_SUCCESS(OPEN); 385 CHECKOP_SUCCESS(CLOSE); 386 CHECKOP_SUCCESS(ACCESS); 387 CHECKOP_SUCCESS(SEEK); 388 389 /* XXXfixme: read w/o write && cache == bad bad bad */ 390 case VOP_GETPAGES_DESCOFFSET: 391 if (!EXISTSOP(pmp, READ)) 392 return genfs_eopnotsupp(v); 393 break; 394 395 case VOP_PUTPAGES_DESCOFFSET: 396 if (!EXISTSOP(pmp, WRITE)) 397 return genfs_null_putpages(v); 398 break; 399 400 default: 401 panic("puffs_checkop: unhandled vnop %d", 402 desc->vdesc_offset); 403 } 404 } 405 406 return VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 407 } 408 409 410 int 411 puffs_lookup(void *v) 412 { 413 struct vop_lookup_args /* { 414 const struct vnodeop_desc *a_desc; 415 struct vnode *a_dvp; 416 struct vnode **a_vpp; 417 struct componentname *a_cnp; 418 } */ *ap = v; 419 struct puffs_mount *pmp; 420 struct componentname *cnp; 421 struct vnode *vp, *dvp; 422 struct puffs_node *dpn; 423 int isdot; 424 int error; 425 426 PUFFS_VNREQ(lookup); 427 428 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 429 cnp = ap->a_cnp; 430 dvp = ap->a_dvp; 431 *ap->a_vpp = NULL; 432 433 /* first things first: check access */ 434 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 435 if (error) 436 return error; 437 438 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 439 440 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %lx\n", 441 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 442 443 /* 444 * Check if someone fed it into the cache 445 */ 446 if (PUFFS_DOCACHE(pmp)) { 447 error = cache_lookup(dvp, ap->a_vpp, cnp); 448 449 if (error >= 0) 450 return error; 451 } 452 453 if (isdot) { 454 vp = ap->a_dvp; 455 vref(vp); 456 *ap->a_vpp = vp; 457 return 0; 458 } 459 460 puffs_makecn(&lookup_arg.pvnr_cn, cnp); 461 462 if (cnp->cn_flags & ISDOTDOT) 463 VOP_UNLOCK(dvp, 0); 464 465 error = puffs_vntouser(pmp, PUFFS_VN_LOOKUP, 466 &lookup_arg, sizeof(lookup_arg), VPTOPNC(dvp), LOCKEDVP(dvp), NULL); 467 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 468 469 /* 470 * In case of error, there is no new vnode to play with, so be 471 * happy with the NULL value given to vpp in the beginning. 472 * Also, check if this really was an error or the target was not 473 * present. Either treat it as a non-error for CREATE/RENAME or 474 * enter the component into the negative name cache (if desired). 475 */ 476 if (error) { 477 if (error == ENOENT) { 478 if ((cnp->cn_flags & ISLASTCN) 479 && (cnp->cn_nameiop == CREATE 480 || cnp->cn_nameiop == RENAME)) { 481 cnp->cn_flags |= SAVENAME; 482 error = EJUSTRETURN; 483 } else { 484 if ((cnp->cn_flags & MAKEENTRY) 485 && PUFFS_DOCACHE(pmp)) 486 cache_enter(dvp, NULL, cnp); 487 } 488 } else { 489 error = ENOENT; 490 } 491 goto errout; 492 } 493 494 /* 495 * Check that we don't get our parent node back, that would cause 496 * a pretty obvious deadlock. 497 */ 498 dpn = dvp->v_data; 499 if (lookup_arg.pvnr_newnode == dpn->pn_cookie) { 500 error = EINVAL; 501 goto errout; 502 } 503 504 /* XXX: race here */ 505 /* XXX2: this check for node existence twice */ 506 vp = puffs_pnode2vnode(pmp, lookup_arg.pvnr_newnode, 1); 507 if (!vp) { 508 error = puffs_getvnode(dvp->v_mount, 509 lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype, 510 lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp); 511 if (error) { 512 goto errout; 513 } 514 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 515 } 516 *ap->a_vpp = vp; 517 518 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_DOCACHE(pmp)) 519 cache_enter(dvp, vp, cnp); 520 521 errout: 522 if (cnp->cn_flags & ISDOTDOT) 523 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 524 525 return error; 526 } 527 528 int 529 puffs_create(void *v) 530 { 531 struct vop_create_args /* { 532 const struct vnodeop_desc *a_desc; 533 struct vnode *a_dvp; 534 struct vnode **a_vpp; 535 struct componentname *a_cnp; 536 struct vattr *a_vap; 537 } */ *ap = v; 538 int error; 539 540 PUFFS_VNREQ(create); 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), VPTOPNC(ap->a_dvp), 547 ap->a_dvp, NULL); 548 if (error) 549 goto out; 550 551 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 552 create_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 0); 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 return error; 559 } 560 561 int 562 puffs_mknod(void *v) 563 { 564 struct vop_mknod_args /* { 565 const struct vnodeop_desc *a_desc; 566 struct vnode *a_dvp; 567 struct vnode **a_vpp; 568 struct componentname *a_cnp; 569 struct vattr *a_vap; 570 } */ *ap = v; 571 int error; 572 573 PUFFS_VNREQ(mknod); 574 575 puffs_makecn(&mknod_arg.pvnr_cn, ap->a_cnp); 576 mknod_arg.pvnr_va = *ap->a_vap; 577 578 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKNOD, 579 &mknod_arg, sizeof(mknod_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 580 if (error) 581 goto out; 582 583 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 584 mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 585 ap->a_vap->va_rdev); 586 587 out: 588 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 589 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 590 vput(ap->a_dvp); 591 return error; 592 } 593 594 int 595 puffs_open(void *v) 596 { 597 struct vop_open_args /* { 598 const struct vnodeop_desc *a_desc; 599 struct vnode *a_vp; 600 int a_mode; 601 kauth_cred_t a_cred; 602 struct lwp *a_l; 603 } */ *ap = v; 604 605 PUFFS_VNREQ(open); 606 607 open_arg.pvnr_mode = ap->a_mode; 608 puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred); 609 open_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 610 611 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_OPEN, 612 &open_arg, sizeof(open_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 613 } 614 615 int 616 puffs_close(void *v) 617 { 618 struct vop_close_args /* { 619 const struct vnodeop_desc *a_desc; 620 struct vnode *a_vp; 621 int a_fflag; 622 kauth_cred_t a_cred; 623 struct lwp *a_l; 624 } */ *ap = v; 625 626 PUFFS_VNREQ(close); 627 628 close_arg.pvnr_fflag = ap->a_fflag; 629 puffs_credcvt(&close_arg.pvnr_cred, ap->a_cred); 630 close_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 631 632 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 633 &close_arg, sizeof(close_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 634 } 635 636 int 637 puffs_access(void *v) 638 { 639 struct vop_access_args /* { 640 const struct vnodeop_desc *a_desc; 641 struct vnode *a_vp; 642 int a_mode; 643 kauth_cred_t a_cred; 644 struct lwp *a_l; 645 } */ *ap = v; 646 647 PUFFS_VNREQ(access); 648 649 access_arg.pvnr_mode = ap->a_mode; 650 access_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 651 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 652 653 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ACCESS, 654 &access_arg, sizeof(access_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 655 } 656 657 int 658 puffs_getattr(void *v) 659 { 660 struct vop_getattr_args /* { 661 const struct vnodeop_desc *a_desc; 662 struct vnode *a_vp; 663 struct vattr *a_vap; 664 kauth_cred_t a_cred; 665 struct lwp *a_l; 666 } */ *ap = v; 667 struct mount *mp; 668 int error; 669 670 PUFFS_VNREQ(getattr); 671 672 mp = ap->a_vp->v_mount; 673 674 vattr_null(&getattr_arg.pvnr_va); 675 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 676 getattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 677 678 /* 679 * XXX + XX (dos equis): this can't go through the unlock/lock 680 * cycle, since it can be called from uvn_attach(), which fiddles 681 * around with VXLOCK and therefore breaks vn_lock(). Proper 682 * fix pending. 683 */ 684 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_GETATTR, 685 &getattr_arg, sizeof(getattr_arg), VPTOPNC(ap->a_vp), 686 NULL /* XXXseeabove: should be LOCKEDVP(ap->a_vp) */, NULL); 687 if (error) 688 return error; 689 690 (void)memcpy(ap->a_vap, &getattr_arg.pvnr_va, sizeof(struct vattr)); 691 692 /* 693 * fill in information userspace does not have 694 * XXX: but would it be better to do fsid at the generic level? 695 */ 696 ap->a_vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 697 698 return 0; 699 } 700 701 int 702 puffs_setattr(void *v) 703 { 704 struct vop_getattr_args /* { 705 const struct vnodeop_desc *a_desc; 706 struct vnode *a_vp; 707 struct vattr *a_vap; 708 kauth_cred_t a_cred; 709 struct lwp *a_l; 710 } */ *ap = v; 711 int error; 712 713 PUFFS_VNREQ(setattr); 714 715 (void)memcpy(&setattr_arg.pvnr_va, ap->a_vap, sizeof(struct vattr)); 716 puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred); 717 setattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 718 719 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR, 720 &setattr_arg, sizeof(setattr_arg), VPTOPNC(ap->a_vp), 721 ap->a_vp, NULL); 722 if (error) 723 return error; 724 725 if (ap->a_vap->va_size != VNOVAL) 726 uvm_vnp_setsize(ap->a_vp, ap->a_vap->va_size); 727 728 return 0; 729 } 730 731 int 732 puffs_inactive(void *v) 733 { 734 struct vop_inactive_args /* { 735 const struct vnodeop_desc *a_desc; 736 struct vnode *a_vp; 737 struct lwp *a_l; 738 } */ *ap = v; 739 struct puffs_mount *pmp; 740 struct puffs_node *pnode; 741 int rv, vnrefs; 742 743 PUFFS_VNREQ(inactive); 744 745 /* 746 * XXX: think about this after we really start unlocking 747 * when going to userspace 748 */ 749 pnode = ap->a_vp->v_data; 750 751 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 752 753 inactive_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 754 755 if (EXISTSOP(pmp, INACTIVE)) 756 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 757 &inactive_arg, sizeof(inactive_arg), VPTOPNC(ap->a_vp), 758 ap->a_vp, NULL); 759 else 760 rv = 1; /* see below */ 761 762 /* can't trust userspace return value? simulate safe answer */ 763 if (rv) 764 vnrefs = 1; 765 else 766 vnrefs = inactive_arg.pvnr_backendrefs; 767 768 VOP_UNLOCK(ap->a_vp, 0); 769 770 /* 771 * user server thinks it's gone? then don't be afraid care, 772 * node's life was already all it would ever be 773 */ 774 if (vnrefs == 0) { 775 pnode->pn_stat |= PNODE_NOREFS; 776 vrecycle(ap->a_vp, NULL, ap->a_l); 777 } 778 779 return 0; 780 } 781 782 /* 783 * always FAF, we don't really care if the server wants to fail to 784 * reclaim the node or not 785 */ 786 int 787 puffs_reclaim(void *v) 788 { 789 struct vop_reclaim_args /* { 790 const struct vnodeop_desc *a_desc; 791 struct vnode *a_vp; 792 struct lwp *a_l; 793 } */ *ap = v; 794 struct puffs_mount *pmp; 795 struct puffs_vnreq_reclaim *reclaim_argp; 796 797 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 798 799 /* 800 * first things first: check if someone is trying to reclaim the 801 * root vnode. do not allow that to travel to userspace. 802 * Note that we don't need to take the lock similarly to 803 * puffs_root(), since there is only one of us. 804 */ 805 if (ap->a_vp->v_flag & VROOT) { 806 simple_lock(&pmp->pmp_lock); 807 KASSERT(pmp->pmp_root != NULL); 808 pmp->pmp_root = NULL; 809 simple_unlock(&pmp->pmp_lock); 810 goto out; 811 } 812 813 if (!EXISTSOP(pmp, RECLAIM)) 814 goto out; 815 816 reclaim_argp = malloc(sizeof(struct puffs_vnreq_reclaim), 817 M_PUFFS, M_WAITOK | M_ZERO); 818 reclaim_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 819 820 puffs_vntouser_faf(pmp, PUFFS_VN_RECLAIM, 821 reclaim_argp, sizeof(struct puffs_vnreq_reclaim), 822 VPTOPNC(ap->a_vp)); 823 824 out: 825 if (PUFFS_DOCACHE(pmp)) 826 cache_purge(ap->a_vp); 827 puffs_putvnode(ap->a_vp); 828 829 return 0; 830 } 831 832 int 833 puffs_readdir(void *v) 834 { 835 struct vop_readdir_args /* { 836 const struct vnodeop_desc *a_desc; 837 struct vnode *a_vp; 838 struct uio *a_uio; 839 kauth_cred_t a_cred; 840 int *a_eofflag; 841 off_t **a_cookies; 842 int *a_ncookies; 843 } */ *ap = v; 844 struct puffs_vnreq_readdir *readdir_argp; 845 size_t argsize; 846 struct uio *uio = ap->a_uio; 847 size_t howmuch; 848 int error; 849 850 /* worry about these later */ 851 if (!(ap->a_cookies == NULL && ap->a_ncookies == NULL)) 852 return EOPNOTSUPP; 853 854 argsize = sizeof(struct puffs_vnreq_readdir); 855 readdir_argp = malloc(argsize, M_PUFFS, M_ZERO | M_WAITOK); 856 857 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 858 readdir_argp->pvnr_offset = uio->uio_offset; 859 readdir_argp->pvnr_resid = uio->uio_resid; 860 861 error = puffs_vntouser_adjbuf(MPTOPUFFSMP(ap->a_vp->v_mount), 862 PUFFS_VN_READDIR, (void **)&readdir_argp, &argsize, 863 readdir_argp->pvnr_resid, VPTOPNC(ap->a_vp), ap->a_vp, NULL); 864 if (error) 865 goto out; 866 867 /* userspace is cheating? */ 868 if (readdir_argp->pvnr_resid > uio->uio_resid) { 869 error = EINVAL; 870 goto out; 871 } 872 873 /* bouncy-wouncy with the directory data */ 874 howmuch = uio->uio_resid - readdir_argp->pvnr_resid; 875 /* XXX: we could let userlandia tell its opinion first time 'round */ 876 if (howmuch == 0) { 877 *ap->a_eofflag = 1; 878 goto out; 879 } 880 error = uiomove(readdir_argp->pvnr_dent, howmuch, uio); 881 if (error) 882 goto out; 883 uio->uio_offset = readdir_argp->pvnr_offset; 884 885 out: 886 free(readdir_argp, M_PUFFS); 887 return error; 888 } 889 890 int 891 puffs_poll(void *v) 892 { 893 struct vop_poll_args /* { 894 const struct vnodeop_desc *a_desc; 895 struct vnode *a_vp; 896 int a_events; 897 struct lwp *a_l; 898 }*/ *ap = v; 899 900 PUFFS_VNREQ(poll); 901 902 poll_arg.pvnr_events = ap->a_events; 903 poll_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 904 905 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_POLL, 906 &poll_arg, sizeof(poll_arg), VPTOPNC(ap->a_vp), NULL, NULL); 907 } 908 909 int 910 puffs_fsync(void *v) 911 { 912 struct vop_fsync_args /* { 913 const struct vnodeop_desc *a_desc; 914 struct vnode *a_vp; 915 kauth_cred_t a_cred; 916 int a_flags; 917 off_t a_offlo; 918 off_t a_offhi; 919 struct lwp *a_l; 920 } */ *ap = v; 921 struct puffs_mount *pmp; 922 struct puffs_vnreq_fsync *fsync_argp; 923 struct vnode *vp; 924 struct puffs_node *pn; 925 int pflags, error, dofaf; 926 927 PUFFS_VNREQ(fsync); 928 929 vp = ap->a_vp; 930 pn = VPTOPP(vp); 931 pmp = MPTOPUFFSMP(vp->v_mount); 932 933 pflags = PGO_CLEANIT; 934 if (ap->a_flags & FSYNC_WAIT) 935 pflags |= PGO_SYNCIO; 936 937 /* 938 * flush pages to avoid being overly dirty 939 */ 940 simple_lock(&vp->v_interlock); 941 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 942 round_page(ap->a_offhi), pflags); 943 if (error) 944 return error; 945 946 /* 947 * HELLO! We exit already here if the user server does not 948 * support fsync OR if we should call fsync for a node which 949 * has references neither in the kernel or the fs server. 950 * Otherwise we continue to issue fsync() forward. 951 */ 952 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_NOREFS)) 953 return 0; 954 955 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 956 /* 957 * We abuse VXLOCK to mean "vnode is going to die", so we issue 958 * only FAFs for those. Otherwise there's a danger of deadlock, 959 * since the execution context here might be the user server 960 * doing some operation on another fs, which in turn caused a 961 * vnode to be reclaimed from the freelist for this fs. 962 */ 963 if (dofaf == 0) { 964 simple_lock(&vp->v_interlock); 965 if (vp->v_flag & VXLOCK) 966 dofaf = 1; 967 simple_unlock(&vp->v_interlock); 968 } 969 970 if (dofaf == 0) { 971 fsync_argp = &fsync_arg; 972 } else { 973 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 974 M_PUFFS, M_ZERO | M_NOWAIT); 975 if (fsync_argp == NULL) 976 return ENOMEM; 977 } 978 979 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 980 fsync_argp->pvnr_flags = ap->a_flags; 981 fsync_argp->pvnr_offlo = ap->a_offlo; 982 fsync_argp->pvnr_offhi = ap->a_offhi; 983 fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 984 985 /* 986 * XXX: see comment at puffs_getattr about locking 987 * 988 * If we are not required to wait, do a FAF operation. 989 * Otherwise block here. 990 */ 991 if (dofaf == 0) { 992 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 993 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 994 VPTOPNC(vp), NULL /* XXXshouldbe: vp */, NULL); 995 } else { 996 /* FAF is always "succesful" */ 997 error = 0; 998 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 999 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 1000 VPTOPNC(vp)); 1001 } 1002 1003 return error; 1004 } 1005 1006 int 1007 puffs_seek(void *v) 1008 { 1009 struct vop_seek_args /* { 1010 const struct vnodeop_desc *a_desc; 1011 struct vnode *a_vp; 1012 off_t a_oldoff; 1013 off_t a_newoff; 1014 kauth_cred_t a_cred; 1015 } */ *ap = v; 1016 1017 PUFFS_VNREQ(seek); 1018 1019 seek_arg.pvnr_oldoff = ap->a_oldoff; 1020 seek_arg.pvnr_newoff = ap->a_newoff; 1021 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1022 1023 /* 1024 * XXX: seems like seek is called with an unlocked vp, but 1025 * it can't hurt to play safe 1026 */ 1027 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1028 &seek_arg, sizeof(seek_arg), VPTOPNC(ap->a_vp), 1029 LOCKEDVP(ap->a_vp), NULL); 1030 } 1031 1032 int 1033 puffs_remove(void *v) 1034 { 1035 struct vop_remove_args /* { 1036 const struct vnodeop_desc *a_desc; 1037 struct vnode *a_dvp; 1038 struct vnode *a_vp; 1039 struct componentname *a_cnp; 1040 } */ *ap = v; 1041 int error; 1042 1043 PUFFS_VNREQ(remove); 1044 1045 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1046 puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp); 1047 1048 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE, 1049 &remove_arg, sizeof(remove_arg), VPTOPNC(ap->a_dvp), 1050 ap->a_dvp, ap->a_vp); 1051 1052 vput(ap->a_vp); 1053 if (ap->a_dvp == ap->a_vp) 1054 vrele(ap->a_dvp); 1055 else 1056 vput(ap->a_dvp); 1057 1058 return error; 1059 } 1060 1061 int 1062 puffs_mkdir(void *v) 1063 { 1064 struct vop_mkdir_args /* { 1065 const struct vnodeop_desc *a_desc; 1066 struct vnode *a_dvp; 1067 struct vnode **a_vpp; 1068 struct componentname *a_cnp; 1069 struct vattr *a_vap; 1070 } */ *ap = v; 1071 int error; 1072 1073 PUFFS_VNREQ(mkdir); 1074 1075 puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp); 1076 mkdir_arg.pvnr_va = *ap->a_vap; 1077 1078 /* XXX: wouldn't need to relock dvp, but that's life */ 1079 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR, 1080 &mkdir_arg, sizeof(mkdir_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1081 if (error) 1082 goto out; 1083 1084 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1085 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1086 1087 out: 1088 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1089 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1090 vput(ap->a_dvp); 1091 return error; 1092 } 1093 1094 int 1095 puffs_rmdir(void *v) 1096 { 1097 struct vop_rmdir_args /* { 1098 const struct vnodeop_desc *a_desc; 1099 struct vnode *a_dvp; 1100 struct vnode *a_vp; 1101 struct componentname *a_cnp; 1102 } */ *ap = v; 1103 int error; 1104 1105 PUFFS_VNREQ(rmdir); 1106 1107 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1108 puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp); 1109 1110 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR, 1111 &rmdir_arg, sizeof(rmdir_arg), VPTOPNC(ap->a_dvp), 1112 ap->a_dvp, ap->a_vp); 1113 1114 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1115 1116 vput(ap->a_dvp); 1117 vput(ap->a_vp); 1118 1119 return error; 1120 } 1121 1122 int 1123 puffs_link(void *v) 1124 { 1125 struct vop_link_args /* { 1126 const struct vnodeop_desc *a_desc; 1127 struct vnode *a_dvp; 1128 struct vnode *a_vp; 1129 struct componentname *a_cnp; 1130 }*/ *ap = v; 1131 int error; 1132 1133 PUFFS_VNREQ(link); 1134 1135 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1136 puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp); 1137 1138 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK, 1139 &link_arg, sizeof(link_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1140 1141 vput(ap->a_dvp); 1142 1143 return error; 1144 } 1145 1146 int 1147 puffs_symlink(void *v) 1148 { 1149 struct vop_symlink_args /* { 1150 const struct vnodeop_desc *a_desc; 1151 struct vnode *a_dvp; 1152 struct vnode **a_vpp; 1153 struct componentname *a_cnp; 1154 struct vattr *a_vap; 1155 char *a_target; 1156 }*/ *ap = v; 1157 int error; 1158 1159 PUFFS_VNREQ(symlink); /* XXX: large structure */ 1160 1161 *ap->a_vpp = NULL; 1162 1163 puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp); 1164 symlink_arg.pvnr_va = *ap->a_vap; 1165 (void)strlcpy(symlink_arg.pvnr_link, ap->a_target, 1166 sizeof(symlink_arg.pvnr_link)); 1167 1168 /* XXX: don't need to relock parent */ 1169 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), 1170 PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg), 1171 VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1172 if (error) 1173 goto out; 1174 1175 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1176 symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0); 1177 1178 out: 1179 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1180 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1181 vput(ap->a_dvp); 1182 return error; 1183 } 1184 1185 int 1186 puffs_readlink(void *v) 1187 { 1188 struct vop_readlink_args /* { 1189 const struct vnodeop_desc *a_desc; 1190 struct vnode *a_vp; 1191 struct uio *a_uio; 1192 kauth_cred_t a_cred; 1193 } */ *ap = v; 1194 int error; 1195 1196 PUFFS_VNREQ(readlink); 1197 1198 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1199 readlink_arg.pvnr_linklen = sizeof(readlink_arg.pvnr_link); 1200 1201 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1202 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 1203 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1204 if (error) 1205 return error; 1206 1207 readlink_arg.pvnr_link[readlink_arg.pvnr_linklen] = '\0'; 1208 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1209 ap->a_uio); 1210 } 1211 1212 /* XXXXXXX: think about locking & userspace op delocking... */ 1213 int 1214 puffs_rename(void *v) 1215 { 1216 struct vop_rename_args /* { 1217 const struct vnodeop_desc *a_desc; 1218 struct vnode *a_fdvp; 1219 struct vnode *a_fvp; 1220 struct componentname *a_fcnp; 1221 struct vnode *a_tdvp; 1222 struct vnode *a_tvp; 1223 struct componentname *a_tcnp; 1224 }*/ *ap = v; 1225 int error; 1226 1227 PUFFS_VNREQ(rename); 1228 1229 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) { 1230 error = EXDEV; 1231 goto out; 1232 } 1233 1234 rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1235 rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1236 if (ap->a_tvp) 1237 rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1238 else 1239 rename_arg.pvnr_cookie_targ = NULL; 1240 puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp); 1241 puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp); 1242 1243 error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount), 1244 PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg), 1245 VPTOPNC(ap->a_fdvp), NULL, NULL); 1246 1247 out: 1248 if (ap->a_tvp != NULL) 1249 vput(ap->a_tvp); 1250 if (ap->a_tdvp == ap->a_tvp) 1251 vrele(ap->a_tdvp); 1252 else 1253 vput(ap->a_tdvp); 1254 1255 vrele(ap->a_fdvp); 1256 vrele(ap->a_fvp); 1257 1258 return error; 1259 } 1260 1261 int 1262 puffs_read(void *v) 1263 { 1264 struct vop_read_args /* { 1265 const struct vnodeop_desc *a_desc; 1266 struct vnode *a_vp; 1267 struct uio *a_uio; 1268 int a_ioflag; 1269 kauth_cred_t a_cred; 1270 } */ *ap = v; 1271 struct puffs_vnreq_read *read_argp; 1272 struct puffs_mount *pmp; 1273 struct vnode *vp; 1274 struct uio *uio; 1275 void *win; 1276 size_t tomove, argsize; 1277 vsize_t bytelen; 1278 int error, ubcflags; 1279 1280 uio = ap->a_uio; 1281 vp = ap->a_vp; 1282 read_argp = NULL; 1283 error = 0; 1284 pmp = MPTOPUFFSMP(vp->v_mount); 1285 1286 /* std sanity */ 1287 if (uio->uio_resid == 0) 1288 return 0; 1289 if (uio->uio_offset < 0) 1290 return EINVAL; 1291 1292 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1293 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1294 1295 ubcflags = 0; 1296 if (UBC_WANT_UNMAP(vp)) 1297 ubcflags = UBC_UNMAP; 1298 1299 while (uio->uio_resid > 0) { 1300 bytelen = MIN(uio->uio_resid, 1301 vp->v_size - uio->uio_offset); 1302 if (bytelen == 0) 1303 break; 1304 1305 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1306 &bytelen, advice, UBC_READ); 1307 error = uiomove(win, bytelen, uio); 1308 ubc_release(win, ubcflags); 1309 if (error) 1310 break; 1311 } 1312 1313 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1314 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1315 } else { 1316 /* 1317 * in case it's not a regular file or we're operating 1318 * uncached, do read in the old-fashioned style, 1319 * i.e. explicit read operations 1320 */ 1321 1322 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1323 argsize = sizeof(struct puffs_vnreq_read); 1324 read_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1325 1326 error = 0; 1327 while (uio->uio_resid > 0) { 1328 read_argp->pvnr_ioflag = ap->a_ioflag; 1329 read_argp->pvnr_resid = tomove; 1330 read_argp->pvnr_offset = uio->uio_offset; 1331 puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred); 1332 1333 argsize = sizeof(struct puffs_vnreq_read); 1334 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1335 (void **)&read_argp, &argsize, 1336 read_argp->pvnr_resid, VPTOPNC(ap->a_vp), 1337 ap->a_vp, NULL); 1338 if (error) 1339 break; 1340 1341 if (read_argp->pvnr_resid > tomove) { 1342 error = EINVAL; 1343 break; 1344 } 1345 1346 error = uiomove(read_argp->pvnr_data, 1347 tomove - read_argp->pvnr_resid, uio); 1348 1349 /* 1350 * in case the file is out of juice, resid from 1351 * userspace is != 0. and the error-case is 1352 * quite obvious 1353 */ 1354 if (error || read_argp->pvnr_resid) 1355 break; 1356 1357 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1358 } 1359 } 1360 1361 if (read_argp) 1362 free(read_argp, M_PUFFS); 1363 return error; 1364 } 1365 1366 int 1367 puffs_write(void *v) 1368 { 1369 struct vop_write_args /* { 1370 const struct vnodeop_desc *a_desc; 1371 struct vnode *a_vp; 1372 struct uio *a_uio; 1373 int a_ioflag; 1374 kauth_cred_t a_cred; 1375 }*/ *ap = v; 1376 struct puffs_vnreq_write *write_argp; 1377 struct puffs_mount *pmp; 1378 struct uio *uio; 1379 struct vnode *vp; 1380 void *win; 1381 size_t tomove, argsize; 1382 off_t oldoff, newoff, origoff; 1383 vsize_t bytelen; 1384 int error, uflags; 1385 int async, ubcflags; 1386 1387 vp = ap->a_vp; 1388 uio = ap->a_uio; 1389 async = vp->v_mount->mnt_flag & MNT_ASYNC; 1390 error = uflags = 0; 1391 write_argp = NULL; 1392 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1393 1394 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1395 ubcflags = 0; 1396 if (UBC_WANT_UNMAP(vp)) 1397 ubcflags = UBC_UNMAP; 1398 1399 /* 1400 * userspace *should* be allowed to control this, 1401 * but with UBC it's a bit unclear how to handle it 1402 */ 1403 if (ap->a_ioflag & IO_APPEND) 1404 uio->uio_offset = vp->v_size; 1405 1406 origoff = uio->uio_offset; 1407 while (uio->uio_resid > 0) { 1408 uflags |= PUFFS_UPDATECTIME; 1409 uflags |= PUFFS_UPDATEMTIME; 1410 oldoff = uio->uio_offset; 1411 bytelen = uio->uio_resid; 1412 1413 win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, 1414 UVM_ADV_NORMAL, UBC_WRITE); 1415 error = uiomove(win, bytelen, uio); 1416 1417 /* 1418 * did we grow the file? 1419 * XXX: should probably ask userspace to extend 1420 * it's idea of the *first* before growing it 1421 * here. Or we need some mechanism to "rollback" 1422 * in case putpages fails. 1423 */ 1424 newoff = oldoff + bytelen; 1425 if (vp->v_size < newoff) { 1426 uflags |= PUFFS_UPDATESIZE; 1427 uvm_vnp_setsize(vp, newoff); 1428 1429 /* 1430 * in case we couldn't copy data to the 1431 * window, zero it out so that we don't 1432 * have any random leftovers in there. 1433 */ 1434 if (error) 1435 memset(win, 0, bytelen); 1436 } 1437 1438 ubc_release(win, ubcflags); 1439 if (error) 1440 break; 1441 1442 /* ok, I really need to admit: why's this? */ 1443 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 1444 simple_lock(&vp->v_interlock); 1445 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1446 uio->uio_offset & ~0xffff, PGO_CLEANIT); 1447 if (error) 1448 break; 1449 } 1450 } 1451 1452 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1453 simple_lock(&vp->v_interlock); 1454 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1455 round_page(uio->uio_offset), 1456 PGO_CLEANIT | PGO_SYNCIO); 1457 } 1458 1459 puffs_updatenode(vp, uflags); 1460 } else { 1461 /* tomove is non-increasing */ 1462 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1463 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1464 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1465 1466 while (uio->uio_resid > 0) { 1467 write_argp->pvnr_ioflag = ap->a_ioflag; 1468 write_argp->pvnr_resid = tomove; 1469 write_argp->pvnr_offset = uio->uio_offset; 1470 puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred); 1471 error = uiomove(write_argp->pvnr_data, tomove, uio); 1472 if (error) 1473 break; 1474 1475 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1476 PUFFS_VN_WRITE, write_argp, argsize, 1477 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1478 if (error) { 1479 /* restore uiomove */ 1480 uio->uio_resid += tomove; 1481 uio->uio_offset -= tomove; 1482 break; 1483 } 1484 if (write_argp->pvnr_resid > tomove) { 1485 /* 1486 * XXX: correct file size is a mystery, 1487 * we can only guess 1488 */ 1489 error = EINVAL; 1490 break; 1491 } 1492 1493 /* adjust file size */ 1494 if (vp->v_size < uio->uio_offset) 1495 uvm_vnp_setsize(vp, uio->uio_offset); 1496 1497 /* didn't move everything? bad userspace. bail */ 1498 if (write_argp->pvnr_resid != 0) { 1499 uio->uio_resid += write_argp->pvnr_resid; 1500 uio->uio_offset -= write_argp->pvnr_resid; 1501 error = EIO; 1502 break; 1503 } 1504 1505 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1506 } 1507 } 1508 1509 if (write_argp) 1510 free(write_argp, M_PUFFS); 1511 return error; 1512 } 1513 1514 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1515 1516 #define FCNIOCTL_ARG_MAX 1<<16 1517 int 1518 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1519 { 1520 1521 /* currently not supported */ 1522 return EOPNOTSUPP; 1523 #if 0 1524 /* struct vop_ioctl_args { 1525 const struct vnodeop_desc *a_desc; 1526 struct vnode *a_vp; 1527 u_long a_command; 1528 void *a_data; 1529 int a_fflag; 1530 kauth_cred_t a_cred; 1531 struct lwp *a_l; 1532 }*ap = v; */ 1533 struct puffs_mount *pmp; 1534 struct puffs_sizepark pspark; 1535 void *kernbuf; 1536 size_t copylen; 1537 int error; 1538 1539 PUFFS_VNREQ(fcnioctl); 1540 1541 /* 1542 * Since this op gives the filesystem (almost) complete control on 1543 * how much it is allowed to copy from the calling process 1544 * address space, do not enable it by default, since it would 1545 * be a whopping security hole. 1546 */ 1547 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1548 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1549 return EINVAL; /* only shoe that fits */ 1550 1551 /* fill in sizereq and store it */ 1552 pspark.pkso_reqid = puffs_getreqid(pmp); 1553 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1554 pspark.pkso_copybuf = ap->a_data; 1555 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1556 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1557 1558 /* then fill in actual request and shoot it off */ 1559 fcnioctl_arg.pvnr_command = ap->a_command; 1560 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1561 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1562 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1563 1564 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1565 &fcnioctl_arg, sizeof(fcnioctl_arg), VPTOPNC(ap->a_vp), 1566 pspark.pkso_reqid, NULL, NULL); 1567 1568 /* if we don't need to copy data, we're done */ 1569 if (error || !fcnioctl_arg.pvnr_copyback) 1570 return error; 1571 1572 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1573 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1574 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1575 if (error) 1576 goto out; 1577 error = copyout(kernbuf, ap->a_data, copylen); 1578 1579 out: 1580 free(kernbuf, M_PUFFS); 1581 return error; 1582 #endif 1583 } 1584 1585 int 1586 puffs_ioctl(void *v) 1587 { 1588 1589 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1590 } 1591 1592 int 1593 puffs_fcntl(void *v) 1594 { 1595 1596 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1597 } 1598 1599 int 1600 puffs_print(void *v) 1601 { 1602 struct vop_print_args /* { 1603 struct vnode *a_vp; 1604 } */ *ap = v; 1605 struct puffs_mount *pmp; 1606 struct vnode *vp = ap->a_vp; 1607 struct puffs_node *pn = vp->v_data; 1608 1609 PUFFS_VNREQ(print); 1610 1611 pmp = MPTOPUFFSMP(vp->v_mount); 1612 1613 /* kernel portion */ 1614 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1615 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1616 if (vp->v_type == VFIFO) 1617 fifo_printinfo(vp); 1618 lockmgr_printinfo(&vp->v_lock); 1619 1620 /* userspace portion */ 1621 if (EXISTSOP(pmp, PRINT)) 1622 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1623 &print_arg, sizeof(print_arg), VPTOPNC(ap->a_vp), 1624 LOCKEDVP(ap->a_vp), NULL); 1625 1626 return 0; 1627 } 1628 1629 int 1630 puffs_pathconf(void *v) 1631 { 1632 struct vop_pathconf_args /* { 1633 const struct vnodeop_desc *a_desc; 1634 struct vnode *a_vp; 1635 int a_name; 1636 register_t *a_retval; 1637 } */ *ap = v; 1638 int error; 1639 1640 PUFFS_VNREQ(pathconf); 1641 1642 pathconf_arg.pvnr_name = ap->a_name; 1643 1644 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1645 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 1646 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1647 if (error) 1648 return error; 1649 1650 *ap->a_retval = pathconf_arg.pvnr_retval; 1651 1652 return 0; 1653 } 1654 1655 int 1656 puffs_advlock(void *v) 1657 { 1658 struct vop_advlock_args /* { 1659 const struct vnodeop_desc *a_desc; 1660 struct vnode *a_vp; 1661 void *a_id; 1662 int a_op; 1663 struct flock *a_fl; 1664 int a_flags; 1665 } */ *ap = v; 1666 int error; 1667 1668 PUFFS_VNREQ(advlock); 1669 1670 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1671 if (error) 1672 return error; 1673 advlock_arg.pvnr_id = ap->a_id; 1674 advlock_arg.pvnr_op = ap->a_op; 1675 advlock_arg.pvnr_flags = ap->a_flags; 1676 1677 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1678 &advlock_arg, sizeof(advlock_arg), VPTOPNC(ap->a_vp), NULL, NULL); 1679 } 1680 /* 1681 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1682 */ 1683 int 1684 puffs_strategy(void *v) 1685 { 1686 struct vop_strategy_args /* { 1687 const struct vnodeop_desc *a_desc; 1688 struct vnode *a_vp; 1689 struct buf *a_bp; 1690 } */ *ap = v; 1691 struct puffs_mount *pmp; 1692 struct vnode *vp = ap->a_vp; 1693 struct puffs_node *pn; 1694 struct puffs_vnreq_read *read_argp = NULL; 1695 struct puffs_vnreq_write *write_argp = NULL; 1696 struct buf *bp; 1697 size_t argsize; 1698 size_t tomove, moved; 1699 int error, dowritefaf; 1700 1701 pmp = MPTOPUFFSMP(vp->v_mount); 1702 bp = ap->a_bp; 1703 error = 0; 1704 dowritefaf = 0; 1705 pn = VPTOPP(vp); 1706 1707 if (((bp->b_flags & B_READ) && !EXISTSOP(pmp, READ)) 1708 || (((bp->b_flags & B_READ) == 0) && !EXISTSOP(pmp, WRITE))) { 1709 error = EOPNOTSUPP; 1710 goto out; 1711 } 1712 1713 /* 1714 * Short-circuit optimization: don't flush buffer in between 1715 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 1716 */ 1717 if (pn->pn_stat & PNODE_NOREFS) { 1718 bp->b_resid = 0; 1719 goto out; 1720 } 1721 1722 #ifdef DIAGNOSTIC 1723 if (bp->b_bcount > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1724 panic("puffs_strategy: wildly inappropriate buf bcount %d", 1725 bp->b_bcount); 1726 #endif 1727 1728 /* 1729 * See explanation for the necessity of a FAF in puffs_fsync. 1730 * 1731 * Also, do FAF in case we're suspending. 1732 * See puffs_vfsops.c:pageflush() 1733 * 1734 * XXgoddamnX: B_WRITE is a "pseudo flag" 1735 */ 1736 if ((bp->b_flags & B_READ) == 0) { 1737 simple_lock(&vp->v_interlock); 1738 if (vp->v_flag & VXLOCK) 1739 dowritefaf = 1; 1740 if (pn->pn_stat & PNODE_SUSPEND) 1741 dowritefaf = 1; 1742 simple_unlock(&vp->v_interlock); 1743 } 1744 1745 /* 1746 * If we're executing as the pagedaemon, do only FAF operations. 1747 * Otherwise the file server has too much power over the fate 1748 * of the entire kernel and things might end up looking like 1749 * in the song (well, almost anyway): 1750 * "sleep", said the pagedaemon 1751 * we are programmed to recv 1752 * you can deadlock any time you like 1753 * and you can never leave 1754 */ 1755 if (curproc == uvm.pagedaemon_proc) 1756 dowritefaf = 1; 1757 1758 #ifdef DIAGNOSTIC 1759 if (dowritefaf) 1760 KASSERT((bp->b_flags & B_READ) == 0); 1761 #endif 1762 1763 if (bp->b_flags & B_READ) { 1764 argsize = sizeof(struct puffs_vnreq_read); 1765 read_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 1766 if (read_argp == NULL) { 1767 error = ENOMEM; 1768 goto out; 1769 } 1770 1771 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 1772 1773 read_argp->pvnr_ioflag = 0; 1774 read_argp->pvnr_resid = tomove; 1775 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1776 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1777 1778 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1779 (void **)&read_argp, &argsize, read_argp->pvnr_resid, 1780 VPTOPNC(vp), LOCKEDVP(vp), NULL); 1781 1782 if (error) 1783 goto out; 1784 1785 if (read_argp->pvnr_resid > tomove) { 1786 error = EINVAL; 1787 goto out; 1788 } 1789 1790 moved = tomove - read_argp->pvnr_resid; 1791 1792 (void)memcpy(bp->b_data, read_argp->pvnr_data, moved); 1793 bp->b_resid -= moved; 1794 } else { 1795 argsize = sizeof(struct puffs_vnreq_write) + bp->b_bcount; 1796 write_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 1797 if (write_argp == NULL) { 1798 error = ENOMEM; 1799 goto out; 1800 } 1801 1802 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 1803 1804 write_argp->pvnr_ioflag = 0; 1805 write_argp->pvnr_resid = tomove; 1806 write_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1807 puffs_credcvt(&write_argp->pvnr_cred, FSCRED); 1808 1809 (void)memcpy(&write_argp->pvnr_data, bp->b_data, tomove); 1810 1811 if (dowritefaf) { 1812 /* 1813 * assume FAF moves everything. frankly, we don't 1814 * really have a choice. 1815 */ 1816 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1817 PUFFS_VN_WRITE, write_argp, argsize, VPTOPNC(vp)); 1818 bp->b_resid -= tomove; 1819 } else { 1820 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1821 PUFFS_VN_WRITE, write_argp, argsize, VPTOPNC(vp), 1822 vp, NULL); 1823 if (error) 1824 goto out; 1825 1826 moved = tomove - write_argp->pvnr_resid; 1827 if (write_argp->pvnr_resid > tomove) { 1828 error = EINVAL; 1829 goto out; 1830 } 1831 1832 bp->b_resid -= moved; 1833 if (write_argp->pvnr_resid != 0) 1834 error = EIO; 1835 } 1836 } 1837 1838 out: 1839 if (read_argp) 1840 free(read_argp, M_PUFFS); 1841 if (write_argp && !dowritefaf) 1842 free(write_argp, M_PUFFS); 1843 1844 if (error) { 1845 bp->b_error = error; 1846 bp->b_flags |= B_ERROR; 1847 } 1848 1849 biodone(bp); 1850 return error; 1851 } 1852 1853 int 1854 puffs_mmap(void *v) 1855 { 1856 struct vop_mmap_args /* { 1857 const struct vnodeop_desc *a_desc; 1858 struct vnode *a_vp; 1859 int a_fflags; 1860 kauth_cred_t a_cred; 1861 struct lwp *a_l; 1862 } */ *ap = v; 1863 struct puffs_mount *pmp; 1864 int error; 1865 1866 PUFFS_VNREQ(mmap); 1867 1868 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1869 1870 if (!PUFFS_DOCACHE(pmp)) 1871 return genfs_eopnotsupp(v); 1872 1873 if (EXISTSOP(pmp, MMAP)) { 1874 mmap_arg.pvnr_fflags = ap->a_fflags; 1875 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 1876 mmap_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1877 1878 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 1879 &mmap_arg, sizeof(mmap_arg), 1880 VPTOPNC(ap->a_vp), NULL, NULL); 1881 } else { 1882 error = genfs_mmap(v); 1883 } 1884 1885 return error; 1886 } 1887 1888 1889 /* 1890 * The rest don't get a free trip to userspace and back, they 1891 * have to stay within the kernel. 1892 */ 1893 1894 /* 1895 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 1896 * well, maybe somehow, somewhere, some day .... 1897 */ 1898 int 1899 puffs_bmap(void *v) 1900 { 1901 struct vop_bmap_args /* { 1902 const struct vnodeop_desc *a_desc; 1903 struct vnode *a_vp; 1904 daddr_t a_bn; 1905 struct vnode **a_vpp; 1906 daddr_t *a_bnp; 1907 int *a_runp; 1908 } */ *ap = v; 1909 struct puffs_mount *pmp; 1910 1911 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1912 1913 if (ap->a_vpp) 1914 *ap->a_vpp = ap->a_vp; 1915 if (ap->a_bnp) 1916 *ap->a_bnp = ap->a_bn; 1917 if (ap->a_runp) 1918 *ap->a_runp = pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX; 1919 1920 return 0; 1921 } 1922 1923 1924 int 1925 puffs_lock(void *v) 1926 { 1927 struct vop_lock_args /* { 1928 struct vnode *a_vp; 1929 int a_flags; 1930 }*/ *ap = v; 1931 struct vnode *vp = ap->a_vp; 1932 struct mount *mp = vp->v_mount; 1933 1934 #if 0 1935 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1936 #endif 1937 1938 /* 1939 * XXX: this avoids deadlocking when we're suspending. 1940 * e.g. some ops holding the vnode lock might be blocked for 1941 * the vfs transaction lock so we'd deadlock. 1942 * 1943 * Now once again this is skating on the thin ice of modern life, 1944 * since we are breaking the consistency guarantee provided 1945 * _to the user server_ by vnode locking. Hopefully this will 1946 * get fixed soon enough by getting rid of the dependency on 1947 * vnode locks alltogether. 1948 */ 1949 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 1950 if (ap->a_flags & LK_INTERLOCK) 1951 simple_unlock(&vp->v_interlock); 1952 return 0; 1953 } 1954 1955 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 1956 } 1957 1958 int 1959 puffs_unlock(void *v) 1960 { 1961 struct vop_unlock_args /* { 1962 struct vnode *a_vp; 1963 int a_flags; 1964 } */ *ap = v; 1965 struct vnode *vp = ap->a_vp; 1966 struct mount *mp = vp->v_mount; 1967 1968 #if 0 1969 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1970 #endif 1971 1972 /* XXX: see puffs_lock() */ 1973 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 1974 if (ap->a_flags & LK_INTERLOCK) 1975 simple_unlock(&vp->v_interlock); 1976 return 0; 1977 } 1978 1979 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 1980 } 1981 1982 int 1983 puffs_islocked(void *v) 1984 { 1985 struct vop_islocked_args *ap = v; 1986 int rv; 1987 1988 rv = lockstatus(&ap->a_vp->v_lock); 1989 return rv; 1990 } 1991 1992 int 1993 puffs_generic(void *v) 1994 { 1995 struct vop_generic_args *ap = v; 1996 1997 (void)ap; 1998 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 1999 2000 return EOPNOTSUPP; 2001 } 2002 2003 2004 /* 2005 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2006 * FAF update information for the puffs node first. 2007 */ 2008 int 2009 puffs_spec_read(void *v) 2010 { 2011 struct vop_read_args /* { 2012 const struct vnodeop_desc *a_desc; 2013 struct vnode *a_vp; 2014 struct uio *a_uio; 2015 int a_ioflag; 2016 kauth_cred_t a_cred; 2017 } */ *ap = v; 2018 2019 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2020 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2021 } 2022 2023 int 2024 puffs_spec_write(void *v) 2025 { 2026 struct vop_write_args /* { 2027 const struct vnodeop_desc *a_desc; 2028 struct vnode *a_vp; 2029 struct uio *a_uio; 2030 int a_ioflag; 2031 kauth_cred_t a_cred; 2032 }*/ *ap = v; 2033 2034 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2035 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2036 } 2037 2038 int 2039 puffs_fifo_read(void *v) 2040 { 2041 struct vop_read_args /* { 2042 const struct vnodeop_desc *a_desc; 2043 struct vnode *a_vp; 2044 struct uio *a_uio; 2045 int a_ioflag; 2046 kauth_cred_t a_cred; 2047 } */ *ap = v; 2048 2049 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2050 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2051 } 2052 2053 int 2054 puffs_fifo_write(void *v) 2055 { 2056 struct vop_write_args /* { 2057 const struct vnodeop_desc *a_desc; 2058 struct vnode *a_vp; 2059 struct uio *a_uio; 2060 int a_ioflag; 2061 kauth_cred_t a_cred; 2062 }*/ *ap = v; 2063 2064 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2065 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2066 } 2067
Indexes created Tue Sep 30 11:09:46 GMT 2025