puffs_vnops.c revision 1.24
1 /* $NetBSD: puffs_vnops.c,v 1.24 2007/01/01 14:41:21 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 1.24 2007/01/01 14:41:21 pooka Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/vnode.h> 40 #include <sys/mount.h> 41 #include <sys/malloc.h> 42 #include <sys/namei.h> 43 44 #include <fs/puffs/puffs_msgif.h> 45 #include <fs/puffs/puffs_sys.h> 46 47 #include <miscfs/fifofs/fifo.h> 48 #include <miscfs/genfs/genfs.h> 49 #include <miscfs/specfs/specdev.h> 50 51 int puffs_lookup(void *); 52 int puffs_create(void *); 53 int puffs_access(void *); 54 int puffs_mknod(void *); 55 int puffs_open(void *); 56 int puffs_close(void *); 57 int puffs_getattr(void *); 58 int puffs_setattr(void *); 59 int puffs_revoke(void *); 60 int puffs_reclaim(void *); 61 int puffs_readdir(void *); 62 int puffs_poll(void *); 63 int puffs_fsync(void *); 64 int puffs_seek(void *); 65 int puffs_remove(void *); 66 int puffs_mkdir(void *); 67 int puffs_rmdir(void *); 68 int puffs_link(void *); 69 int puffs_readlink(void *); 70 int puffs_symlink(void *); 71 int puffs_rename(void *); 72 int puffs_read(void *); 73 int puffs_write(void *); 74 int puffs_fcntl(void *); 75 int puffs_ioctl(void *); 76 int puffs_inactive(void *); 77 int puffs_print(void *); 78 int puffs_pathconf(void *); 79 int puffs_advlock(void *); 80 int puffs_strategy(void *); 81 int puffs_bmap(void *); 82 int puffs_mmap(void *); 83 84 int puffs_checkop(void *); 85 86 87 /* VOP_LEASE() not included */ 88 89 int puffs_generic(void *); 90 91 #if 0 92 #define puffs_lock genfs_lock 93 #define puffs_unlock genfs_unlock 94 #define puffs_islocked genfs_islocked 95 #else 96 int puffs_lock(void *); 97 int puffs_unlock(void *); 98 int puffs_islocked(void *); 99 #endif 100 101 /* 102 * no special specops for now. hmm, probably don't want to handle 103 * these synchronously, since they don't actually demand any 104 * response. so maybe we need another touser-type thing... 105 */ 106 #define puffsspec_read spec_read 107 #define puffsspec_write spec_write 108 #define puffsspec_close spec_close 109 /* no special fifo-ooops either */ 110 #define puffsfifo_read fifo_read 111 #define puffsfifo_write fifo_write 112 #define puffsfifo_close fifo_close 113 114 int (**puffs_vnodeop_p)(void *); 115 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 116 { &vop_default_desc, vn_default_error }, 117 { &vop_lookup_desc, puffs_lookup }, /* REAL lookup */ 118 { &vop_create_desc, puffs_checkop }, /* create */ 119 { &vop_mknod_desc, puffs_checkop }, /* mknod */ 120 { &vop_open_desc, puffs_checkop }, /* open */ 121 { &vop_close_desc, puffs_checkop }, /* close */ 122 { &vop_access_desc, puffs_checkop }, /* access */ 123 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 124 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 125 { &vop_read_desc, puffs_checkop }, /* read */ 126 { &vop_write_desc, puffs_checkop }, /* write */ 127 { &vop_fcntl_desc, puffs_checkop }, /* fcntl */ 128 { &vop_ioctl_desc, puffs_checkop }, /* ioctl */ 129 { &vop_fsync_desc, puffs_checkop }, /* fsync */ 130 { &vop_seek_desc, puffs_checkop }, /* seek */ 131 { &vop_remove_desc, puffs_checkop }, /* remove */ 132 { &vop_link_desc, puffs_checkop }, /* link */ 133 { &vop_rename_desc, puffs_checkop }, /* rename */ 134 { &vop_mkdir_desc, puffs_checkop }, /* mkdir */ 135 { &vop_rmdir_desc, puffs_checkop }, /* rmdir */ 136 { &vop_symlink_desc, puffs_checkop }, /* symlink */ 137 { &vop_readdir_desc, puffs_checkop }, /* readdir */ 138 { &vop_readlink_desc, puffs_checkop }, /* readlink */ 139 { &vop_getpages_desc, puffs_checkop }, /* getpages */ 140 { &vop_putpages_desc, puffs_checkop }, /* putpages */ 141 { &vop_pathconf_desc, puffs_checkop }, /* pathconf */ 142 { &vop_advlock_desc, puffs_checkop }, /* advlock */ 143 { &vop_strategy_desc, puffs_strategy }, /* REAL strategy */ 144 { &vop_revoke_desc, puffs_revoke }, /* REAL revoke */ 145 { &vop_abortop_desc, genfs_abortop }, /* REAL abortop */ 146 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 147 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 148 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 149 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 150 { &vop_bmap_desc, puffs_bmap }, /* REAL bmap */ 151 { &vop_print_desc, puffs_print }, /* REAL print */ 152 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 153 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 154 { &vop_mmap_desc, puffs_mmap }, /* REAL mmap */ 155 156 { &vop_poll_desc, genfs_eopnotsupp }, /* poll XXX */ 157 { &vop_poll_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 158 { NULL, NULL } 159 }; 160 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 161 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 162 163 164 int (**puffs_specop_p)(void *); 165 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 166 { &vop_default_desc, vn_default_error }, 167 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 168 { &vop_create_desc, spec_create }, /* genfs_badop */ 169 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 170 { &vop_open_desc, spec_open }, /* spec_open */ 171 { &vop_close_desc, puffsspec_close }, /* close */ 172 { &vop_access_desc, puffs_access }, /* access */ 173 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 174 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 175 { &vop_read_desc, puffsspec_read }, /* read */ 176 { &vop_write_desc, puffsspec_write }, /* write */ 177 { &vop_lease_desc, spec_lease_check }, /* genfs_nullop */ 178 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 179 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 180 { &vop_poll_desc, spec_poll }, /* spec_poll */ 181 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 182 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 183 { &vop_mmap_desc, spec_mmap }, /* genfs_mmap (dummy) */ 184 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 185 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 186 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 187 { &vop_link_desc, spec_link }, /* genfs_badop */ 188 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 189 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 190 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 191 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 192 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 193 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 194 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 195 { &vop_inactive_desc, puffs_inactive }, /* inactive */ 196 { &vop_reclaim_desc, puffs_reclaim }, /* reclaim */ 197 { &vop_lock_desc, puffs_lock }, /* lock */ 198 { &vop_unlock_desc, puffs_unlock }, /* unlock */ 199 { &vop_bmap_desc, spec_bmap }, /* dummy */ 200 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 201 { &vop_print_desc, puffs_print }, /* print */ 202 { &vop_islocked_desc, puffs_islocked }, /* islocked */ 203 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 204 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 205 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 206 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 207 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 208 #if 0 209 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 210 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 211 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 212 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 213 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 214 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 215 #endif 216 { NULL, NULL } 217 }; 218 const struct vnodeopv_desc puffs_specop_opv_desc = 219 { &puffs_specop_p, puffs_specop_entries }; 220 221 222 int (**puffs_fifoop_p)(void *); 223 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 224 { &vop_default_desc, vn_default_error }, 225 { &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */ 226 { &vop_create_desc, fifo_create }, /* genfs_badop */ 227 { &vop_mknod_desc, fifo_mknod }, /* genfs_badop */ 228 { &vop_open_desc, fifo_open }, /* open */ 229 { &vop_close_desc, puffsfifo_close }, /* close */ 230 { &vop_access_desc, puffs_access }, /* access */ 231 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 232 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 233 { &vop_read_desc, puffsfifo_read }, /* read */ 234 { &vop_write_desc, puffsfifo_write }, /* write */ 235 { &vop_lease_desc, fifo_lease_check }, /* genfs_nullop */ 236 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 237 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 238 { &vop_poll_desc, fifo_poll }, /* poll */ 239 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 240 { &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */ 241 { &vop_mmap_desc, fifo_mmap }, /* genfs_badop */ 242 { &vop_fsync_desc, puffs_fsync }, /* fsync */ 243 { &vop_seek_desc, fifo_seek }, /* genfs_badop */ 244 { &vop_remove_desc, fifo_remove }, /* genfs_badop */ 245 { &vop_link_desc, fifo_link }, /* genfs_badop */ 246 { &vop_rename_desc, fifo_rename }, /* genfs_badop */ 247 { &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */ 248 { &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */ 249 { &vop_symlink_desc, fifo_symlink }, /* genfs_badop */ 250 { &vop_readdir_desc, fifo_readdir }, /* genfs_badop */ 251 { &vop_readlink_desc, fifo_readlink }, /* genfs_badop */ 252 { &vop_abortop_desc, fifo_abortop }, /* genfs_badop */ 253 { &vop_inactive_desc, puffs_inactive }, /* inactive */ 254 { &vop_reclaim_desc, puffs_reclaim }, /* reclaim */ 255 { &vop_lock_desc, puffs_lock }, /* lock */ 256 { &vop_unlock_desc, puffs_unlock }, /* unlock */ 257 { &vop_bmap_desc, fifo_bmap }, /* dummy */ 258 { &vop_strategy_desc, fifo_strategy }, /* genfs_badop */ 259 { &vop_print_desc, puffs_print }, /* print */ 260 { &vop_islocked_desc, puffs_islocked }, /* islocked */ 261 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 262 { &vop_advlock_desc, fifo_advlock }, /* genfs_einval */ 263 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 264 { &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/ 265 #if 0 266 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 267 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 268 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 269 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 270 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 271 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 272 #endif 273 { NULL, NULL } 274 }; 275 const struct vnodeopv_desc puffs_fifoop_opv_desc = 276 { &puffs_fifoop_p, puffs_fifoop_entries }; 277 278 279 /* "real" vnode operations */ 280 int (**puffs_msgop_p)(void *); 281 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 282 { &vop_default_desc, vn_default_error }, 283 { &vop_create_desc, puffs_create }, /* create */ 284 { &vop_mknod_desc, puffs_mknod }, /* mknod */ 285 { &vop_open_desc, puffs_open }, /* open */ 286 { &vop_close_desc, puffs_close }, /* close */ 287 { &vop_access_desc, puffs_access }, /* access */ 288 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 289 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 290 { &vop_read_desc, puffs_read }, /* read */ 291 { &vop_write_desc, puffs_write }, /* write */ 292 { &vop_fcntl_desc, puffs_fcntl }, /* fcntl */ 293 { &vop_ioctl_desc, puffs_ioctl }, /* ioctl */ 294 { &vop_fsync_desc, puffs_fsync }, /* fsync */ 295 { &vop_seek_desc, puffs_seek }, /* seek */ 296 { &vop_remove_desc, puffs_remove }, /* remove */ 297 { &vop_link_desc, puffs_link }, /* link */ 298 { &vop_rename_desc, puffs_rename }, /* rename */ 299 { &vop_mkdir_desc, puffs_mkdir }, /* mkdir */ 300 { &vop_rmdir_desc, puffs_rmdir }, /* rmdir */ 301 { &vop_symlink_desc, puffs_symlink }, /* symlink */ 302 { &vop_readdir_desc, puffs_readdir }, /* readdir */ 303 { &vop_readlink_desc, puffs_readlink }, /* readlink */ 304 { &vop_print_desc, puffs_print }, /* print */ 305 { &vop_islocked_desc, puffs_islocked }, /* islocked */ 306 { &vop_pathconf_desc, puffs_pathconf }, /* pathconf */ 307 { &vop_advlock_desc, puffs_advlock }, /* advlock */ 308 { &vop_getpages_desc, genfs_getpages }, /* getpages */ 309 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 310 { NULL, NULL } 311 }; 312 const struct vnodeopv_desc puffs_msgop_opv_desc = 313 { &puffs_msgop_p, puffs_msgop_entries }; 314 315 316 #define LOCKEDVP(a) (VOP_ISLOCKED(a) ? (a) : NULL) 317 318 319 /* 320 * This is a generic vnode operation handler. It checks if the necessary 321 * operations for the called vnode operation are implemented by userspace 322 * and either returns a dummy return value or proceeds to call the real 323 * vnode operation from puffs_msgop_v. 324 * 325 * XXX: this should described elsewhere and autogenerated, the complexity 326 * of the vnode operations vectors and their interrelationships is also 327 * getting a bit out of hand. Another problem is that we need this same 328 * information in the fs server code, so keeping the two in sync manually 329 * is not a viable (long term) plan. 330 */ 331 332 /* not supported, handle locking protocol */ 333 #define CHECKOP_NOTSUPP(op) \ 334 case VOP_##op##_DESCOFFSET: \ 335 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 336 return genfs_eopnotsupp(v); \ 337 break 338 339 /* always succeed, no locking */ 340 #define CHECKOP_SUCCESS(op) \ 341 case VOP_##op##_DESCOFFSET: \ 342 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 343 return 0; \ 344 break 345 346 int 347 puffs_checkop(void *v) 348 { 349 struct vop_generic_args /* { 350 struct vnodeop_desc *a_desc; 351 spooky mystery contents; 352 } */ *ap = v; 353 struct vnodeop_desc *desc = ap->a_desc; 354 struct puffs_mount *pmp; 355 struct vnode *vp; 356 int offset; 357 358 DPRINTF_VERBOSE(("checkop call %s (%d)\n", 359 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset)); 360 361 offset = ap->a_desc->vdesc_vp_offsets[0]; 362 #ifdef DIAGNOSTIC 363 if (offset == VDESC_NO_OFFSET) 364 panic("puffs_checkop: no vnode, why did you call me?"); 365 #endif 366 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 367 pmp = MPTOPUFFSMP(vp->v_mount); 368 369 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOPS) == 0) { 370 switch (desc->vdesc_offset) { 371 CHECKOP_NOTSUPP(CREATE); 372 CHECKOP_NOTSUPP(MKNOD); 373 CHECKOP_NOTSUPP(GETATTR); 374 CHECKOP_NOTSUPP(SETATTR); 375 CHECKOP_NOTSUPP(READ); 376 CHECKOP_NOTSUPP(WRITE); 377 CHECKOP_NOTSUPP(FCNTL); 378 CHECKOP_NOTSUPP(IOCTL); 379 CHECKOP_NOTSUPP(REMOVE); 380 CHECKOP_NOTSUPP(LINK); 381 CHECKOP_NOTSUPP(RENAME); 382 CHECKOP_NOTSUPP(MKDIR); 383 CHECKOP_NOTSUPP(RMDIR); 384 CHECKOP_NOTSUPP(SYMLINK); 385 CHECKOP_NOTSUPP(READDIR); 386 CHECKOP_NOTSUPP(READLINK); 387 CHECKOP_NOTSUPP(PRINT); 388 CHECKOP_NOTSUPP(PATHCONF); 389 CHECKOP_NOTSUPP(ADVLOCK); 390 391 CHECKOP_SUCCESS(OPEN); 392 CHECKOP_SUCCESS(CLOSE); 393 CHECKOP_SUCCESS(ACCESS); 394 CHECKOP_SUCCESS(SEEK); 395 396 /* putpages & fsync doesn't make sense if there's no write */ 397 case VOP_FSYNC_DESCOFFSET: 398 if (!EXISTSOP(pmp, WRITE)) 399 return genfs_eopnotsupp(v); 400 break; 401 402 case VOP_GETPAGES_DESCOFFSET: 403 if (!EXISTSOP(pmp, READ)) 404 return genfs_eopnotsupp(v); 405 break; 406 407 case VOP_PUTPAGES_DESCOFFSET: 408 if (!EXISTSOP(pmp, WRITE)) 409 return genfs_null_putpages(v); 410 break; 411 412 default: 413 panic("puffs_checkop: unhandled vnop %d", 414 desc->vdesc_offset); 415 } 416 } 417 418 return VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 419 } 420 421 422 int 423 puffs_lookup(void *v) 424 { 425 struct vop_lookup_args /* { 426 const struct vnodeop_desc *a_desc; 427 struct vnode *a_dvp; 428 struct vnode **a_vpp; 429 struct componentname *a_cnp; 430 } */ *ap = v; 431 struct puffs_mount *pmp; 432 struct componentname *cnp; 433 struct vnode *vp, *dvp; 434 int isdot; 435 int error; 436 437 PUFFS_VNREQ(lookup); 438 439 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 440 cnp = ap->a_cnp; 441 dvp = ap->a_dvp; 442 *ap->a_vpp = NULL; 443 444 /* first things first: check access */ 445 error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_lwp); 446 if (error) 447 return error; 448 449 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 450 451 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %lx\n", 452 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 453 454 /* 455 * Do sanity checks we can do without consulting userland. 456 */ 457 458 /* 459 * last component check & ro fs 460 * 461 * hmmm... why doesn't this check for create? 462 */ 463 if ((cnp->cn_flags & ISLASTCN) 464 && (ap->a_dvp->v_mount->mnt_flag & MNT_RDONLY) 465 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) { 466 DPRINTF(("puffs_lookup: write lookup for read-only fs!\n")); 467 return EROFS; 468 } 469 470 /* 471 * Check if someone fed it into the cache 472 */ 473 if (PUFFS_DOCACHE(pmp)) { 474 error = cache_lookup(dvp, ap->a_vpp, cnp); 475 if (error >= 0) 476 return error; 477 } 478 479 if (isdot) { 480 vp = ap->a_dvp; 481 vref(vp); 482 *ap->a_vpp = vp; 483 return 0; 484 } 485 486 puffs_makecn(&lookup_arg.pvnr_cn, cnp); 487 488 if (cnp->cn_flags & ISDOTDOT) 489 VOP_UNLOCK(dvp, 0); 490 491 error = puffs_vntouser(pmp, PUFFS_VN_LOOKUP, 492 &lookup_arg, sizeof(lookup_arg), VPTOPNC(dvp), LOCKEDVP(dvp), NULL); 493 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 494 495 /* 496 * In case of error, there is no new vnode to play with, so be 497 * happy with the NULL value given to vpp in the beginning. 498 * Also, check if this really was an error or the target was not 499 * present. Either treat it as a non-error for CREATE/RENAME or 500 * enter the component into the negative name cache (if desired). 501 */ 502 if (error) { 503 if (error == ENOENT) { 504 if ((cnp->cn_flags & ISLASTCN) 505 && (cnp->cn_nameiop == CREATE 506 || cnp->cn_nameiop == RENAME)) { 507 cnp->cn_flags |= SAVENAME; 508 error = EJUSTRETURN; 509 } else { 510 if ((cnp->cn_flags & MAKEENTRY) 511 && PUFFS_DOCACHE(pmp)) 512 cache_enter(dvp, NULL, cnp); 513 } 514 } 515 goto errout; 516 } 517 518 vp = puffs_pnode2vnode(pmp, lookup_arg.pvnr_newnode); 519 if (!vp) { 520 error = puffs_getvnode(dvp->v_mount, 521 lookup_arg.pvnr_newnode, lookup_arg.pvnr_vtype, 522 lookup_arg.pvnr_size, lookup_arg.pvnr_rdev, &vp); 523 if (error) { 524 goto errout; 525 } 526 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 527 } 528 *ap->a_vpp = vp; 529 530 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_DOCACHE(pmp)) 531 cache_enter(dvp, vp, cnp); 532 533 errout: 534 if (cnp->cn_flags & ISDOTDOT) 535 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 536 537 return error; 538 } 539 540 int 541 puffs_create(void *v) 542 { 543 struct vop_create_args /* { 544 const struct vnodeop_desc *a_desc; 545 struct vnode *a_dvp; 546 struct vnode **a_vpp; 547 struct componentname *a_cnp; 548 struct vattr *a_vap; 549 } */ *ap = v; 550 int error; 551 552 PUFFS_VNREQ(create); 553 554 puffs_makecn(&create_arg.pvnr_cn, ap->a_cnp); 555 create_arg.pvnr_va = *ap->a_vap; 556 557 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_CREATE, 558 &create_arg, sizeof(create_arg), VPTOPNC(ap->a_dvp), 559 ap->a_dvp, NULL); 560 if (error) 561 goto out; 562 563 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 564 create_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 0); 565 566 out: 567 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 568 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 569 vput(ap->a_dvp); 570 return error; 571 } 572 573 int 574 puffs_mknod(void *v) 575 { 576 struct vop_mknod_args /* { 577 const struct vnodeop_desc *a_desc; 578 struct vnode *a_dvp; 579 struct vnode **a_vpp; 580 struct componentname *a_cnp; 581 struct vattr *a_vap; 582 } */ *ap = v; 583 int error; 584 585 PUFFS_VNREQ(mknod); 586 587 puffs_makecn(&mknod_arg.pvnr_cn, ap->a_cnp); 588 mknod_arg.pvnr_va = *ap->a_vap; 589 590 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKNOD, 591 &mknod_arg, sizeof(mknod_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 592 if (error) 593 goto out; 594 595 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 596 mknod_arg.pvnr_newnode, ap->a_cnp, ap->a_vap->va_type, 597 ap->a_vap->va_rdev); 598 599 out: 600 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 601 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 602 vput(ap->a_dvp); 603 return error; 604 } 605 606 int 607 puffs_open(void *v) 608 { 609 struct vop_open_args /* { 610 const struct vnodeop_desc *a_desc; 611 struct vnode *a_vp; 612 int a_mode; 613 kauth_cred_t a_cred; 614 struct lwp *a_l; 615 } */ *ap = v; 616 617 PUFFS_VNREQ(open); 618 619 open_arg.pvnr_mode = ap->a_mode; 620 puffs_credcvt(&open_arg.pvnr_cred, ap->a_cred); 621 open_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 622 623 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_OPEN, 624 &open_arg, sizeof(open_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 625 } 626 627 int 628 puffs_close(void *v) 629 { 630 struct vop_close_args /* { 631 const struct vnodeop_desc *a_desc; 632 struct vnode *a_vp; 633 int a_fflag; 634 kauth_cred_t a_cred; 635 struct lwp *a_l; 636 } */ *ap = v; 637 638 PUFFS_VNREQ(close); 639 640 close_arg.pvnr_fflag = ap->a_fflag; 641 puffs_credcvt(&close_arg.pvnr_cred, ap->a_cred); 642 close_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 643 644 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_CLOSE, 645 &close_arg, sizeof(close_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 646 } 647 648 int 649 puffs_access(void *v) 650 { 651 struct vop_access_args /* { 652 const struct vnodeop_desc *a_desc; 653 struct vnode *a_vp; 654 int a_mode; 655 kauth_cred_t a_cred; 656 struct lwp *a_l; 657 } */ *ap = v; 658 659 PUFFS_VNREQ(access); 660 661 access_arg.pvnr_mode = ap->a_mode; 662 access_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 663 puffs_credcvt(&access_arg.pvnr_cred, ap->a_cred); 664 665 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ACCESS, 666 &access_arg, sizeof(access_arg), VPTOPNC(ap->a_vp), ap->a_vp, NULL); 667 } 668 669 int 670 puffs_getattr(void *v) 671 { 672 struct vop_getattr_args /* { 673 const struct vnodeop_desc *a_desc; 674 struct vnode *a_vp; 675 struct vattr *a_vap; 676 kauth_cred_t a_cred; 677 struct lwp *a_l; 678 } */ *ap = v; 679 struct mount *mp; 680 int error; 681 682 PUFFS_VNREQ(getattr); 683 684 mp = ap->a_vp->v_mount; 685 686 vattr_null(&getattr_arg.pvnr_va); 687 puffs_credcvt(&getattr_arg.pvnr_cred, ap->a_cred); 688 getattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 689 690 /* 691 * XXX + XX (dos equis): this can't go through the unlock/lock 692 * cycle, since it can be called from uvn_attach(), which fiddles 693 * around with VXLOCK and therefore breaks vn_lock(). Proper 694 * fix pending. 695 */ 696 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_GETATTR, 697 &getattr_arg, sizeof(getattr_arg), VPTOPNC(ap->a_vp), 698 NULL /* XXXseeabove: should be LOCKEDVP(ap->a_vp) */, NULL); 699 if (error) 700 return error; 701 702 (void)memcpy(ap->a_vap, &getattr_arg.pvnr_va, sizeof(struct vattr)); 703 704 /* 705 * fill in information userspace does not have 706 * XXX: but would it be better to do fsid at the generic level? 707 */ 708 ap->a_vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 709 710 return 0; 711 } 712 713 int 714 puffs_setattr(void *v) 715 { 716 struct vop_getattr_args /* { 717 const struct vnodeop_desc *a_desc; 718 struct vnode *a_vp; 719 struct vattr *a_vap; 720 kauth_cred_t a_cred; 721 struct lwp *a_l; 722 } */ *ap = v; 723 int error; 724 725 PUFFS_VNREQ(setattr); 726 727 (void)memcpy(&setattr_arg.pvnr_va, ap->a_vap, sizeof(struct vattr)); 728 puffs_credcvt(&setattr_arg.pvnr_cred, ap->a_cred); 729 setattr_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 730 731 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SETATTR, 732 &setattr_arg, sizeof(setattr_arg), VPTOPNC(ap->a_vp), 733 ap->a_vp, NULL); 734 if (error) 735 return error; 736 737 if (ap->a_vap->va_size != VNOVAL) 738 uvm_vnp_setsize(ap->a_vp, ap->a_vap->va_size); 739 740 return 0; 741 } 742 743 int 744 puffs_revoke(void *v) 745 { 746 struct vop_revoke_args /* { 747 const struct vnodeop_desc *a_desc; 748 struct vnode *a_vp; 749 int a_flags; 750 } */ *ap = v; 751 struct puffs_mount *pmp; 752 753 PUFFS_VNREQ(revoke); 754 755 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 756 757 revoke_arg.pvnr_flags = ap->a_flags; 758 759 /* don't really care if userspace doesn't want to play along */ 760 if (EXISTSOP(pmp, REVOKE)) 761 puffs_vntouser(pmp, PUFFS_VN_REVOKE, 762 &revoke_arg, sizeof(revoke_arg), VPTOPNC(ap->a_vp), 763 NULL, NULL); 764 765 return genfs_revoke(v); 766 } 767 768 /* 769 * There is no technical need to have this travel to userspace 770 * synchronously. So once async reply support is in place, make this 771 * async. 772 */ 773 int 774 puffs_inactive(void *v) 775 { 776 struct vop_inactive_args /* { 777 const struct vnodeop_desc *a_desc; 778 struct vnode *a_vp; 779 struct lwp *a_l; 780 } */ *ap = v; 781 struct puffs_mount *pmp; 782 struct puffs_node *pnode; 783 int rv, vnrefs; 784 785 PUFFS_VNREQ(inactive); 786 787 /* 788 * XXX: think about this after we really start unlocking 789 * when going to userspace 790 */ 791 pnode = ap->a_vp->v_data; 792 pnode->pn_stat |= PNODE_INACTIVE; 793 794 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 795 796 inactive_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 797 798 if (EXISTSOP(pmp, INACTIVE)) 799 rv = puffs_vntouser(pmp, PUFFS_VN_INACTIVE, 800 &inactive_arg, sizeof(inactive_arg), VPTOPNC(ap->a_vp), 801 ap->a_vp, NULL); 802 else 803 rv = 1; /* see below */ 804 805 /* can't trust userspace return value? simulate safe answer */ 806 if (rv) 807 vnrefs = 1; 808 else 809 vnrefs = inactive_arg.pvnr_backendrefs; 810 811 VOP_UNLOCK(ap->a_vp, 0); 812 813 /* 814 * user server thinks it's gone? then don't be afraid care, 815 * node's life was already all it would ever be 816 */ 817 if (vnrefs == 0) 818 vrecycle(ap->a_vp, NULL, ap->a_l); 819 820 return 0; 821 } 822 823 int 824 puffs_reclaim(void *v) 825 { 826 struct vop_reclaim_args /* { 827 const struct vnodeop_desc *a_desc; 828 struct vnode *a_vp; 829 struct lwp *a_l; 830 } */ *ap = v; 831 struct puffs_mount *pmp; 832 int error; 833 834 PUFFS_VNREQ(reclaim); 835 836 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 837 838 /* 839 * first things first: check if someone is trying to reclaim the 840 * root vnode. do not allow that to travel to userspace. 841 * Note that we don't need to take the lock similarly to 842 * puffs_root(), since there is only one of us. 843 */ 844 if (ap->a_vp->v_flag & VROOT) { 845 #ifdef DIAGNOSTIC 846 simple_lock(&pmp->pmp_lock); 847 if (pmp->pmp_root == NULL) 848 panic("puffs_reclaim: releasing root vnode (%p) twice", 849 ap->a_vp); 850 simple_unlock(&pmp->pmp_lock); 851 #endif 852 pmp->pmp_root = NULL; 853 puffs_putvnode(ap->a_vp); 854 return 0; 855 } 856 857 reclaim_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 858 859 if (EXISTSOP(pmp, RECLAIM)) 860 error = puffs_vntouser(pmp, PUFFS_VN_RECLAIM, 861 &reclaim_arg, sizeof(reclaim_arg), VPTOPNC(ap->a_vp), 862 NULL, NULL); 863 else 864 error = 0; 865 #if 0 866 /* 867 * XXX: if reclaim fails for any other reason than the userspace 868 * being dead, we should consider unmounting the filesystem, since 869 * we can't trust it to be in a consistent state anymore. But for 870 * now, just ignore all errors. 871 */ 872 if (error) 873 return error; 874 #endif 875 876 if (PUFFS_DOCACHE(pmp)) 877 cache_purge(ap->a_vp); 878 puffs_putvnode(ap->a_vp); 879 880 return 0; 881 } 882 883 int 884 puffs_readdir(void *v) 885 { 886 struct vop_readdir_args /* { 887 const struct vnodeop_desc *a_desc; 888 struct vnode *a_vp; 889 struct uio *a_uio; 890 kauth_cred_t a_cred; 891 int *a_eofflag; 892 off_t **a_cookies; 893 int *a_ncookies; 894 } */ *ap = v; 895 struct puffs_vnreq_readdir *readdir_argp; 896 size_t argsize; 897 struct uio *uio = ap->a_uio; 898 size_t howmuch; 899 int error; 900 901 /* worry about these later */ 902 if (!(ap->a_cookies == NULL && ap->a_ncookies == NULL)) 903 return EOPNOTSUPP; 904 905 argsize = sizeof(struct puffs_vnreq_readdir); 906 readdir_argp = malloc(argsize, M_PUFFS, M_ZERO | M_WAITOK); 907 908 puffs_credcvt(&readdir_argp->pvnr_cred, ap->a_cred); 909 readdir_argp->pvnr_offset = uio->uio_offset; 910 readdir_argp->pvnr_resid = uio->uio_resid; 911 912 error = puffs_vntouser_adjbuf(MPTOPUFFSMP(ap->a_vp->v_mount), 913 PUFFS_VN_READDIR, (void **)&readdir_argp, &argsize, 914 readdir_argp->pvnr_resid, VPTOPNC(ap->a_vp), ap->a_vp, NULL); 915 if (error) 916 goto out; 917 918 /* userspace is cheating? */ 919 if (readdir_argp->pvnr_resid > uio->uio_resid) { 920 error = EINVAL; 921 goto out; 922 } 923 924 /* bouncy-wouncy with the directory data */ 925 howmuch = uio->uio_resid - readdir_argp->pvnr_resid; 926 error = uiomove(readdir_argp->pvnr_dent, howmuch, uio); 927 if (error) 928 goto out; 929 uio->uio_offset = readdir_argp->pvnr_offset; 930 931 out: 932 free(readdir_argp, M_PUFFS); 933 return error; 934 } 935 936 int 937 puffs_poll(void *v) 938 { 939 struct vop_poll_args /* { 940 const struct vnodeop_desc *a_desc; 941 struct vnode *a_vp; 942 int a_events; 943 struct lwp *a_l; 944 }*/ *ap = v; 945 946 PUFFS_VNREQ(poll); 947 948 poll_arg.pvnr_events = ap->a_events; 949 poll_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 950 951 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_POLL, 952 &poll_arg, sizeof(poll_arg), VPTOPNC(ap->a_vp), NULL, NULL); 953 } 954 955 int 956 puffs_fsync(void *v) 957 { 958 struct vop_fsync_args /* { 959 const struct vnodeop_desc *a_desc; 960 struct vnode *a_vp; 961 kauth_cred_t a_cred; 962 int a_flags; 963 off_t a_offlo; 964 off_t a_offhi; 965 struct lwp *a_l; 966 } */ *ap = v; 967 struct puffs_vnreq_fsync *fsync_argp; 968 struct vnode *vp; 969 int pflags, error; 970 971 PUFFS_VNREQ(fsync); 972 973 vp = ap->a_vp; 974 975 pflags = PGO_CLEANIT; 976 if (ap->a_flags & FSYNC_WAIT) { 977 pflags |= PGO_SYNCIO; 978 fsync_argp = &fsync_arg; 979 } else { 980 fsync_argp = malloc(sizeof(struct puffs_vnreq_fsync), 981 M_PUFFS, M_ZERO | M_NOWAIT); 982 if (fsync_argp == NULL) 983 return ENOMEM; 984 } 985 986 /* 987 * flush pages to avoid being overly dirty 988 */ 989 simple_lock(&vp->v_interlock); 990 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 991 round_page(ap->a_offhi), pflags); 992 if (error) 993 return error; 994 995 puffs_credcvt(&fsync_argp->pvnr_cred, ap->a_cred); 996 fsync_argp->pvnr_flags = ap->a_flags; 997 fsync_argp->pvnr_offlo = ap->a_offlo; 998 fsync_argp->pvnr_offhi = ap->a_offhi; 999 fsync_argp->pvnr_pid = puffs_lwp2pid(ap->a_l); 1000 1001 /* 1002 * XXX: see comment at puffs_getattr about locking 1003 * 1004 * If we are not required to wait, do a FAF operation. 1005 * Otherwise block here. 1006 */ 1007 if (ap->a_flags & FSYNC_WAIT) { 1008 error = puffs_vntouser(MPTOPUFFSMP(vp->v_mount), 1009 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 1010 VPTOPNC(vp), NULL /* XXXshouldbe: vp */, NULL); 1011 } else { 1012 /* FAF is always "succesful" */ 1013 error = 0; 1014 puffs_vntouser_faf(MPTOPUFFSMP(vp->v_mount), 1015 PUFFS_VN_FSYNC, fsync_argp, sizeof(*fsync_argp), 1016 VPTOPNC(vp)); 1017 } 1018 1019 return error; 1020 } 1021 1022 int 1023 puffs_seek(void *v) 1024 { 1025 struct vop_seek_args /* { 1026 const struct vnodeop_desc *a_desc; 1027 struct vnode *a_vp; 1028 off_t a_oldoff; 1029 off_t a_newoff; 1030 kauth_cred_t a_cred; 1031 } */ *ap = v; 1032 1033 PUFFS_VNREQ(seek); 1034 1035 seek_arg.pvnr_oldoff = ap->a_oldoff; 1036 seek_arg.pvnr_newoff = ap->a_newoff; 1037 puffs_credcvt(&seek_arg.pvnr_cred, ap->a_cred); 1038 1039 /* 1040 * XXX: seems like seek is called with an unlocked vp, but 1041 * it can't hurt to play safe 1042 */ 1043 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_SEEK, 1044 &seek_arg, sizeof(seek_arg), VPTOPNC(ap->a_vp), 1045 LOCKEDVP(ap->a_vp), NULL); 1046 } 1047 1048 int 1049 puffs_remove(void *v) 1050 { 1051 struct vop_remove_args /* { 1052 const struct vnodeop_desc *a_desc; 1053 struct vnode *a_dvp; 1054 struct vnode *a_vp; 1055 struct componentname *a_cnp; 1056 } */ *ap = v; 1057 int error; 1058 1059 PUFFS_VNREQ(remove); 1060 1061 remove_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1062 puffs_makecn(&remove_arg.pvnr_cn, ap->a_cnp); 1063 1064 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_REMOVE, 1065 &remove_arg, sizeof(remove_arg), VPTOPNC(ap->a_dvp), 1066 ap->a_dvp, ap->a_vp); 1067 1068 vput(ap->a_vp); 1069 vput(ap->a_dvp); 1070 1071 return error; 1072 } 1073 1074 int 1075 puffs_mkdir(void *v) 1076 { 1077 struct vop_mkdir_args /* { 1078 const struct vnodeop_desc *a_desc; 1079 struct vnode *a_dvp; 1080 struct vnode **a_vpp; 1081 struct componentname *a_cnp; 1082 struct vattr *a_vap; 1083 } */ *ap = v; 1084 int error; 1085 1086 PUFFS_VNREQ(mkdir); 1087 1088 puffs_makecn(&mkdir_arg.pvnr_cn, ap->a_cnp); 1089 mkdir_arg.pvnr_va = *ap->a_vap; 1090 1091 /* XXX: wouldn't need to relock dvp, but that's life */ 1092 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_MKDIR, 1093 &mkdir_arg, sizeof(mkdir_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1094 if (error) 1095 goto out; 1096 1097 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1098 mkdir_arg.pvnr_newnode, ap->a_cnp, VDIR, 0); 1099 1100 out: 1101 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1102 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1103 vput(ap->a_dvp); 1104 return error; 1105 } 1106 1107 int 1108 puffs_rmdir(void *v) 1109 { 1110 struct vop_rmdir_args /* { 1111 const struct vnodeop_desc *a_desc; 1112 struct vnode *a_dvp; 1113 struct vnode *a_vp; 1114 struct componentname *a_cnp; 1115 } */ *ap = v; 1116 int error; 1117 1118 PUFFS_VNREQ(rmdir); 1119 1120 rmdir_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1121 puffs_makecn(&rmdir_arg.pvnr_cn, ap->a_cnp); 1122 1123 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_RMDIR, 1124 &rmdir_arg, sizeof(rmdir_arg), VPTOPNC(ap->a_dvp), 1125 ap->a_dvp, ap->a_vp); 1126 1127 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1128 1129 vput(ap->a_dvp); 1130 vput(ap->a_vp); 1131 1132 return error; 1133 } 1134 1135 int 1136 puffs_link(void *v) 1137 { 1138 struct vop_link_args /* { 1139 const struct vnodeop_desc *a_desc; 1140 struct vnode *a_dvp; 1141 struct vnode *a_vp; 1142 struct componentname *a_cnp; 1143 }*/ *ap = v; 1144 int error; 1145 1146 PUFFS_VNREQ(link); 1147 1148 link_arg.pvnr_cookie_targ = VPTOPNC(ap->a_vp); 1149 puffs_makecn(&link_arg.pvnr_cn, ap->a_cnp); 1150 1151 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), PUFFS_VN_LINK, 1152 &link_arg, sizeof(link_arg), VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1153 1154 vput(ap->a_dvp); 1155 1156 return error; 1157 } 1158 1159 int 1160 puffs_symlink(void *v) 1161 { 1162 struct vop_symlink_args /* { 1163 const struct vnodeop_desc *a_desc; 1164 struct vnode *a_dvp; 1165 struct vnode **a_vpp; 1166 struct componentname *a_cnp; 1167 struct vattr *a_vap; 1168 char *a_target; 1169 }*/ *ap = v; 1170 int error; 1171 1172 PUFFS_VNREQ(symlink); /* XXX: large structure */ 1173 1174 *ap->a_vpp = NULL; 1175 1176 puffs_makecn(&symlink_arg.pvnr_cn, ap->a_cnp); 1177 symlink_arg.pvnr_va = *ap->a_vap; 1178 (void)strlcpy(symlink_arg.pvnr_link, ap->a_target, 1179 sizeof(symlink_arg.pvnr_link)); 1180 1181 /* XXX: don't need to relock parent */ 1182 error = puffs_vntouser(MPTOPUFFSMP(ap->a_dvp->v_mount), 1183 PUFFS_VN_SYMLINK, &symlink_arg, sizeof(symlink_arg), 1184 VPTOPNC(ap->a_dvp), ap->a_dvp, NULL); 1185 if (error) 1186 goto out; 1187 1188 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1189 symlink_arg.pvnr_newnode, ap->a_cnp, VLNK, 0); 1190 1191 out: 1192 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1193 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1194 vput(ap->a_dvp); 1195 return error; 1196 } 1197 1198 int 1199 puffs_readlink(void *v) 1200 { 1201 struct vop_readlink_args /* { 1202 const struct vnodeop_desc *a_desc; 1203 struct vnode *a_vp; 1204 struct uio *a_uio; 1205 kauth_cred_t a_cred; 1206 } */ *ap = v; 1207 int error; 1208 1209 PUFFS_VNREQ(readlink); 1210 1211 puffs_credcvt(&readlink_arg.pvnr_cred, ap->a_cred); 1212 readlink_arg.pvnr_linklen = sizeof(readlink_arg.pvnr_link); 1213 1214 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1215 PUFFS_VN_READLINK, &readlink_arg, sizeof(readlink_arg), 1216 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1217 if (error) 1218 return error; 1219 1220 readlink_arg.pvnr_link[readlink_arg.pvnr_linklen] = '\0'; 1221 return uiomove(&readlink_arg.pvnr_link, readlink_arg.pvnr_linklen, 1222 ap->a_uio); 1223 } 1224 1225 /* XXXXXXX: think about locking & userspace op delocking... */ 1226 int 1227 puffs_rename(void *v) 1228 { 1229 struct vop_rename_args /* { 1230 const struct vnodeop_desc *a_desc; 1231 struct vnode *a_fdvp; 1232 struct vnode *a_fvp; 1233 struct componentname *a_fcnp; 1234 struct vnode *a_tdvp; 1235 struct vnode *a_tvp; 1236 struct componentname *a_tcnp; 1237 }*/ *ap = v; 1238 int error; 1239 1240 PUFFS_VNREQ(rename); 1241 1242 /* 1243 * participate in the duck hunt 1244 * (I could do with some canard a la presse, so hopefully 1245 * this is succesful) 1246 */ 1247 KASSERT(ap->a_tdvp != ap->a_tvp); 1248 1249 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) { 1250 error = EXDEV; 1251 goto out; 1252 } 1253 1254 rename_arg.pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1255 rename_arg.pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1256 if (ap->a_tvp) 1257 rename_arg.pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1258 else 1259 rename_arg.pvnr_cookie_targ = NULL; 1260 puffs_makecn(&rename_arg.pvnr_cn_src, ap->a_fcnp); 1261 puffs_makecn(&rename_arg.pvnr_cn_targ, ap->a_tcnp); 1262 1263 error = puffs_vntouser(MPTOPUFFSMP(ap->a_fdvp->v_mount), 1264 PUFFS_VN_RENAME, &rename_arg, sizeof(rename_arg), 1265 VPTOPNC(ap->a_fdvp), NULL, NULL); 1266 1267 out: 1268 vput(ap->a_tdvp); 1269 if (ap->a_tvp != NULL) 1270 vput(ap->a_tvp); 1271 1272 vrele(ap->a_fdvp); 1273 vrele(ap->a_fvp); 1274 1275 return error; 1276 } 1277 1278 int 1279 puffs_read(void *v) 1280 { 1281 struct vop_read_args /* { 1282 const struct vnodeop_desc *a_desc; 1283 struct vnode *a_vp; 1284 struct uio *a_uio; 1285 int a_ioflag; 1286 kauth_cred_t a_cred; 1287 } */ *ap = v; 1288 struct puffs_vnreq_read *read_argp; 1289 struct puffs_mount *pmp; 1290 struct vnode *vp; 1291 struct uio *uio; 1292 void *win; 1293 size_t tomove, argsize; 1294 vsize_t bytelen; 1295 int error, ubcflags; 1296 1297 uio = ap->a_uio; 1298 vp = ap->a_vp; 1299 read_argp = NULL; 1300 error = 0; 1301 pmp = MPTOPUFFSMP(vp->v_mount); 1302 1303 /* std sanity */ 1304 if (uio->uio_resid == 0) 1305 return 0; 1306 if (uio->uio_offset < 0) 1307 return EINVAL; 1308 1309 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1310 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1311 1312 ubcflags = 0; 1313 if (UBC_WANT_UNMAP(vp)) 1314 ubcflags = UBC_UNMAP; 1315 1316 while (uio->uio_resid > 0) { 1317 bytelen = MIN(uio->uio_resid, 1318 vp->v_size - uio->uio_offset); 1319 if (bytelen == 0) 1320 break; 1321 1322 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1323 &bytelen, advice, UBC_READ); 1324 error = uiomove(win, bytelen, uio); 1325 ubc_release(win, ubcflags); 1326 if (error) 1327 break; 1328 } 1329 1330 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1331 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1332 } else { 1333 /* 1334 * in case it's not a regular file or we're operating 1335 * uncached, do read in the old-fashioned style, 1336 * i.e. explicit read operations 1337 */ 1338 1339 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1340 argsize = sizeof(struct puffs_vnreq_read); 1341 read_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1342 1343 error = 0; 1344 while (uio->uio_resid > 0) { 1345 read_argp->pvnr_ioflag = ap->a_ioflag; 1346 read_argp->pvnr_resid = tomove; 1347 read_argp->pvnr_offset = uio->uio_offset; 1348 puffs_credcvt(&read_argp->pvnr_cred, ap->a_cred); 1349 1350 argsize = sizeof(struct puffs_vnreq_read); 1351 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1352 (void **)&read_argp, &argsize, 1353 read_argp->pvnr_resid, VPTOPNC(ap->a_vp), 1354 ap->a_vp, NULL); 1355 if (error) 1356 break; 1357 1358 if (read_argp->pvnr_resid > tomove) { 1359 error = EINVAL; 1360 break; 1361 } 1362 1363 error = uiomove(read_argp->pvnr_data, 1364 tomove - read_argp->pvnr_resid, uio); 1365 1366 /* 1367 * in case the file is out of juice, resid from 1368 * userspace is != 0. and the error-case is 1369 * quite obvious 1370 */ 1371 if (error || read_argp->pvnr_resid) 1372 break; 1373 1374 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1375 } 1376 } 1377 1378 if (read_argp) 1379 free(read_argp, M_PUFFS); 1380 return error; 1381 } 1382 1383 int 1384 puffs_write(void *v) 1385 { 1386 struct vop_write_args /* { 1387 const struct vnodeop_desc *a_desc; 1388 struct vnode *a_vp; 1389 struct uio *a_uio; 1390 int a_ioflag; 1391 kauth_cred_t a_cred; 1392 }*/ *ap = v; 1393 struct puffs_vnreq_write *write_argp; 1394 struct puffs_mount *pmp; 1395 struct uio *uio; 1396 struct vnode *vp; 1397 void *win; 1398 size_t tomove, argsize; 1399 off_t oldoff, newoff, origoff; 1400 vsize_t bytelen; 1401 int error, uflags; 1402 int async, ubcflags; 1403 1404 vp = ap->a_vp; 1405 uio = ap->a_uio; 1406 async = vp->v_mount->mnt_flag & MNT_ASYNC; 1407 error = uflags = 0; 1408 write_argp = NULL; 1409 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1410 1411 if (vp->v_type == VREG && PUFFS_DOCACHE(pmp)) { 1412 ubcflags = 0; 1413 if (UBC_WANT_UNMAP(vp)) 1414 ubcflags = UBC_UNMAP; 1415 1416 /* 1417 * userspace *should* be allowed to control this, 1418 * but with UBC it's a bit unclear how to handle it 1419 */ 1420 if (ap->a_ioflag & IO_APPEND) 1421 uio->uio_offset = vp->v_size; 1422 1423 origoff = uio->uio_offset; 1424 while (uio->uio_resid > 0) { 1425 uflags |= PUFFS_UPDATECTIME; 1426 uflags |= PUFFS_UPDATEMTIME; 1427 oldoff = uio->uio_offset; 1428 bytelen = uio->uio_resid; 1429 1430 win = ubc_alloc(&vp->v_uobj, oldoff, &bytelen, 1431 UVM_ADV_NORMAL, UBC_WRITE); 1432 error = uiomove(win, bytelen, uio); 1433 1434 /* 1435 * did we grow the file? 1436 * XXX: should probably ask userspace to extend 1437 * it's idea of the *first* before growing it 1438 * here. Or we need some mechanism to "rollback" 1439 * in case putpages fails. 1440 */ 1441 newoff = oldoff + bytelen; 1442 if (vp->v_size < newoff) { 1443 uflags |= PUFFS_UPDATESIZE; 1444 uvm_vnp_setsize(vp, newoff); 1445 1446 /* 1447 * in case we couldn't copy data to the 1448 * window, zero it out so that we don't 1449 * have any random leftovers in there. 1450 */ 1451 if (error) 1452 memset(win, 0, bytelen); 1453 } 1454 1455 ubc_release(win, ubcflags); 1456 if (error) 1457 break; 1458 1459 /* ok, I really need to admit: why's this? */ 1460 if (!async && oldoff >> 16 != uio->uio_offset >> 16) { 1461 simple_lock(&vp->v_interlock); 1462 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1463 uio->uio_offset & ~0xffff, PGO_CLEANIT); 1464 if (error) 1465 break; 1466 } 1467 } 1468 1469 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1470 simple_lock(&vp->v_interlock); 1471 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1472 round_page(uio->uio_offset), 1473 PGO_CLEANIT | PGO_SYNCIO); 1474 } 1475 1476 puffs_updatenode(vp, uflags); 1477 } else { 1478 /* tomove is non-increasing */ 1479 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1480 argsize = sizeof(struct puffs_vnreq_write) + tomove; 1481 write_argp = malloc(argsize, M_PUFFS, M_WAITOK | M_ZERO); 1482 1483 while (uio->uio_resid > 0) { 1484 write_argp->pvnr_ioflag = ap->a_ioflag; 1485 write_argp->pvnr_resid = tomove; 1486 write_argp->pvnr_offset = uio->uio_offset; 1487 puffs_credcvt(&write_argp->pvnr_cred, ap->a_cred); 1488 error = uiomove(write_argp->pvnr_data, tomove, uio); 1489 if (error) 1490 break; 1491 1492 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1493 PUFFS_VN_WRITE, write_argp, argsize, 1494 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1495 if (error) { 1496 /* restore uiomove */ 1497 uio->uio_resid += tomove; 1498 uio->uio_offset -= tomove; 1499 break; 1500 } 1501 if (write_argp->pvnr_resid > tomove) { 1502 /* 1503 * XXX: correct file size is a mystery, 1504 * we can only guess 1505 */ 1506 error = EINVAL; 1507 break; 1508 } 1509 1510 /* adjust file size */ 1511 if (vp->v_size < uio->uio_offset) 1512 uvm_vnp_setsize(vp, uio->uio_offset); 1513 1514 /* didn't move everything? bad userspace. bail */ 1515 if (write_argp->pvnr_resid != 0) { 1516 uio->uio_resid += write_argp->pvnr_resid; 1517 uio->uio_offset -= write_argp->pvnr_resid; 1518 error = EIO; 1519 break; 1520 } 1521 1522 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1523 } 1524 } 1525 1526 if (write_argp) 1527 free(write_argp, M_PUFFS); 1528 return error; 1529 } 1530 1531 static int puffs_fcnioctl(struct vop_ioctl_args * /*XXX*/, int); 1532 1533 #define FCNIOCTL_ARG_MAX 1<<16 1534 int 1535 puffs_fcnioctl(struct vop_ioctl_args *ap, int puffsop) 1536 { 1537 1538 /* currently not supported */ 1539 return EOPNOTSUPP; 1540 #if 0 1541 /* struct vop_ioctl_args { 1542 const struct vnodeop_desc *a_desc; 1543 struct vnode *a_vp; 1544 u_long a_command; 1545 void *a_data; 1546 int a_fflag; 1547 kauth_cred_t a_cred; 1548 struct lwp *a_l; 1549 }*ap = v; */ 1550 struct puffs_mount *pmp; 1551 struct puffs_sizepark pspark; 1552 void *kernbuf; 1553 size_t copylen; 1554 int error; 1555 1556 PUFFS_VNREQ(fcnioctl); 1557 1558 /* 1559 * Since this op gives the filesystem (almost) complete control on 1560 * how much it is allowed to copy from the calling process 1561 * address space, do not enable it by default, since it would 1562 * be a whopping security hole. 1563 */ 1564 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1565 if ((pmp->pmp_flags & PUFFS_KFLAG_ALLOWCTL) == 0) 1566 return EINVAL; /* only shoe that fits */ 1567 1568 /* fill in sizereq and store it */ 1569 pspark.pkso_reqid = puffs_getreqid(pmp); 1570 pspark.pkso_reqtype = PUFFS_SIZEOPREQ_BUF_IN; 1571 pspark.pkso_copybuf = ap->a_data; 1572 pspark.pkso_bufsize = FCNIOCTL_ARG_MAX; 1573 TAILQ_INSERT_TAIL(&pmp->pmp_req_sizepark, &pspark, pkso_entries); 1574 1575 /* then fill in actual request and shoot it off */ 1576 fcnioctl_arg.pvnr_command = ap->a_command; 1577 fcnioctl_arg.pvnr_fflag = ap->a_fflag; 1578 puffs_credcvt(&fcnioctl_arg.pvnr_cred, ap->a_cred); 1579 fcnioctl_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1580 1581 error = puffs_vntouser_req(MPTOPUFFSMP(ap->a_vp->v_mount), puffsop, 1582 &fcnioctl_arg, sizeof(fcnioctl_arg), VPTOPNC(ap->a_vp), 1583 pspark.pkso_reqid, NULL, NULL); 1584 1585 /* if we don't need to copy data, we're done */ 1586 if (error || !fcnioctl_arg.pvnr_copyback) 1587 return error; 1588 1589 copylen = MIN(FCNIOCTL_ARG_MAX, fcnioctl_arg.pvnr_datalen); 1590 kernbuf = malloc(copylen, M_PUFFS, M_WAITOK); 1591 error = copyin(fcnioctl_arg.pvnr_data, kernbuf, copylen); 1592 if (error) 1593 goto out; 1594 error = copyout(kernbuf, ap->a_data, copylen); 1595 1596 out: 1597 free(kernbuf, M_PUFFS); 1598 return error; 1599 #endif 1600 } 1601 1602 int 1603 puffs_ioctl(void *v) 1604 { 1605 1606 return puffs_fcnioctl(v, PUFFS_VN_IOCTL); 1607 } 1608 1609 int 1610 puffs_fcntl(void *v) 1611 { 1612 1613 return puffs_fcnioctl(v, PUFFS_VN_FCNTL); 1614 } 1615 1616 int 1617 puffs_print(void *v) 1618 { 1619 struct vop_print_args /* { 1620 struct vnode *a_vp; 1621 } */ *ap = v; 1622 struct puffs_mount *pmp; 1623 struct vnode *vp = ap->a_vp; 1624 struct puffs_node *pn = vp->v_data; 1625 1626 PUFFS_VNREQ(print); 1627 1628 pmp = MPTOPUFFSMP(vp->v_mount); 1629 1630 /* kernel portion */ 1631 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1632 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1633 if (vp->v_type == VFIFO) 1634 fifo_printinfo(vp); 1635 lockmgr_printinfo(&vp->v_lock); 1636 1637 /* userspace portion */ 1638 if (EXISTSOP(pmp, PRINT)) 1639 puffs_vntouser(pmp, PUFFS_VN_PRINT, 1640 &print_arg, sizeof(print_arg), VPTOPNC(ap->a_vp), 1641 LOCKEDVP(ap->a_vp), NULL); 1642 1643 return 0; 1644 } 1645 1646 int 1647 puffs_pathconf(void *v) 1648 { 1649 struct vop_pathconf_args /* { 1650 const struct vnodeop_desc *a_desc; 1651 struct vnode *a_vp; 1652 int a_name; 1653 register_t *a_retval; 1654 } */ *ap = v; 1655 int error; 1656 1657 PUFFS_VNREQ(pathconf); 1658 1659 pathconf_arg.pvnr_name = ap->a_name; 1660 1661 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1662 PUFFS_VN_PATHCONF, &pathconf_arg, sizeof(pathconf_arg), 1663 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1664 if (error) 1665 return error; 1666 1667 *ap->a_retval = pathconf_arg.pvnr_retval; 1668 1669 return 0; 1670 } 1671 1672 int 1673 puffs_advlock(void *v) 1674 { 1675 struct vop_advlock_args /* { 1676 const struct vnodeop_desc *a_desc; 1677 struct vnode *a_vp; 1678 void *a_id; 1679 int a_op; 1680 struct flock *a_fl; 1681 int a_flags; 1682 } */ *ap = v; 1683 int error; 1684 1685 PUFFS_VNREQ(advlock); 1686 1687 error = copyin(ap->a_fl, &advlock_arg.pvnr_fl, sizeof(struct flock)); 1688 if (error) 1689 return error; 1690 advlock_arg.pvnr_id = ap->a_id; 1691 advlock_arg.pvnr_op = ap->a_op; 1692 advlock_arg.pvnr_flags = ap->a_flags; 1693 1694 return puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), PUFFS_VN_ADVLOCK, 1695 &advlock_arg, sizeof(advlock_arg), VPTOPNC(ap->a_vp), NULL, NULL); 1696 } 1697 /* 1698 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 1699 */ 1700 int 1701 puffs_strategy(void *v) 1702 { 1703 struct vop_strategy_args /* { 1704 const struct vnodeop_desc *a_desc; 1705 struct vnode *a_vp; 1706 struct buf *a_bp; 1707 } */ *ap = v; 1708 struct puffs_mount *pmp; 1709 struct puffs_vnreq_read *read_argp = NULL; 1710 struct puffs_vnreq_write *write_argp = NULL; 1711 struct buf *bp; 1712 size_t argsize; 1713 size_t tomove, moved; 1714 int error; 1715 1716 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1717 bp = ap->a_bp; 1718 1719 if ((bp->b_flags & B_READ) && !EXISTSOP(pmp, READ)) 1720 return EOPNOTSUPP; 1721 if ((bp->b_flags & B_WRITE) && !EXISTSOP(pmp, WRITE)) 1722 return EOPNOTSUPP; 1723 1724 #ifdef DIAGNOSTIC 1725 if (bp->b_resid > pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX) 1726 panic("puffs_strategy: wildly inappropriate buf resid %d", 1727 bp->b_resid); 1728 #endif 1729 1730 if (bp->b_flags & B_READ) { 1731 argsize = sizeof(struct puffs_vnreq_read); 1732 read_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 1733 if (read_argp == NULL) { 1734 error = ENOMEM; 1735 goto out; 1736 } 1737 1738 tomove = PUFFS_TOMOVE(bp->b_resid, pmp); 1739 1740 read_argp->pvnr_ioflag = 0; 1741 read_argp->pvnr_resid = tomove; 1742 read_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1743 puffs_credcvt(&read_argp->pvnr_cred, FSCRED); 1744 1745 error = puffs_vntouser_adjbuf(pmp, PUFFS_VN_READ, 1746 (void **)&read_argp, &argsize, 1747 read_argp->pvnr_resid, VPTOPNC(ap->a_vp), 1748 LOCKEDVP(ap->a_vp), NULL); 1749 1750 if (error) 1751 goto out; 1752 1753 if (read_argp->pvnr_resid > tomove) { 1754 error = EINVAL; 1755 goto out; 1756 } 1757 1758 moved = tomove - read_argp->pvnr_resid; 1759 1760 (void)memcpy(bp->b_data, read_argp->pvnr_data, moved); 1761 bp->b_resid -= moved; 1762 } else { 1763 argsize = sizeof(struct puffs_vnreq_write) + bp->b_bcount; 1764 write_argp = malloc(argsize, M_PUFFS, M_NOWAIT | M_ZERO); 1765 if (write_argp == NULL) { 1766 error = ENOMEM; 1767 goto out; 1768 } 1769 1770 tomove = PUFFS_TOMOVE(bp->b_resid, pmp); 1771 1772 write_argp->pvnr_ioflag = 0; 1773 write_argp->pvnr_resid = tomove; 1774 write_argp->pvnr_offset = bp->b_blkno << DEV_BSHIFT; 1775 puffs_credcvt(&write_argp->pvnr_cred, FSCRED); 1776 1777 (void)memcpy(&write_argp->pvnr_data, bp->b_data, tomove); 1778 1779 error = puffs_vntouser(MPTOPUFFSMP(ap->a_vp->v_mount), 1780 PUFFS_VN_WRITE, write_argp, argsize, 1781 VPTOPNC(ap->a_vp), ap->a_vp, NULL); 1782 if (error) 1783 goto out; 1784 1785 moved = write_argp->pvnr_resid - tomove; 1786 1787 if (write_argp->pvnr_resid > tomove) { 1788 error = EINVAL; 1789 goto out; 1790 } 1791 1792 bp->b_resid -= moved; 1793 if (write_argp->pvnr_resid != 0) 1794 error = EIO; 1795 } 1796 1797 out: 1798 if (read_argp) 1799 free(read_argp, M_PUFFS); 1800 if (write_argp) 1801 free(write_argp, M_PUFFS); 1802 1803 biodone(ap->a_bp); 1804 return error; 1805 } 1806 1807 int 1808 puffs_mmap(void *v) 1809 { 1810 struct vop_mmap_args /* { 1811 const struct vnodeop_desc *a_desc; 1812 struct vnode *a_vp; 1813 int a_fflags; 1814 kauth_cred_t a_cred; 1815 struct lwp *a_l; 1816 } */ *ap = v; 1817 struct puffs_mount *pmp; 1818 int error; 1819 1820 PUFFS_VNREQ(mmap); 1821 1822 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1823 1824 if (!PUFFS_DOCACHE(pmp)) 1825 return genfs_eopnotsupp(v); 1826 1827 if (EXISTSOP(pmp, MMAP)) { 1828 mmap_arg.pvnr_fflags = ap->a_fflags; 1829 puffs_credcvt(&mmap_arg.pvnr_cred, ap->a_cred); 1830 mmap_arg.pvnr_pid = puffs_lwp2pid(ap->a_l); 1831 1832 error = puffs_vntouser(pmp, PUFFS_VN_MMAP, 1833 &mmap_arg, sizeof(mmap_arg), 1834 VPTOPNC(ap->a_vp), NULL, NULL); 1835 } else { 1836 error = genfs_mmap(v); 1837 } 1838 1839 return error; 1840 } 1841 1842 1843 /* 1844 * The rest don't get a free trip to userspace and back, they 1845 * have to stay within the kernel. 1846 */ 1847 1848 /* 1849 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 1850 * well, maybe somehow, somewhere, some day .... 1851 */ 1852 int 1853 puffs_bmap(void *v) 1854 { 1855 struct vop_bmap_args /* { 1856 const struct vnodeop_desc *a_desc; 1857 struct vnode *a_vp; 1858 daddr_t a_bn; 1859 struct vnode **a_vpp; 1860 daddr_t *a_bnp; 1861 int *a_runp; 1862 } */ *ap = v; 1863 struct puffs_mount *pmp; 1864 1865 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1866 1867 if (ap->a_vpp) 1868 *ap->a_vpp = ap->a_vp; 1869 if (ap->a_bnp) 1870 *ap->a_bnp = ap->a_bn; 1871 if (ap->a_runp) 1872 *ap->a_runp = pmp->pmp_req_maxsize - PUFFS_REQSTRUCT_MAX; 1873 1874 return 0; 1875 } 1876 1877 /* 1878 * moreXXX: yes, todo 1879 */ 1880 int 1881 puffs_lock(void *v) 1882 { 1883 struct vop_lock_args /* { 1884 struct vnode *a_vp; 1885 int a_flags; 1886 }*/ *ap = v; 1887 struct vnode *vp = ap->a_vp; 1888 1889 #if 0 1890 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1891 #endif 1892 1893 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 1894 } 1895 1896 int 1897 puffs_unlock(void *v) 1898 { 1899 struct vop_unlock_args /* { 1900 struct vnode *a_vp; 1901 int a_flags; 1902 } */ *ap = v; 1903 struct vnode *vp = ap->a_vp; 1904 1905 #if 0 1906 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 1907 #endif 1908 1909 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 1910 } 1911 1912 int 1913 puffs_islocked(void *v) 1914 { 1915 struct vop_islocked_args *ap = v; 1916 int rv; 1917 1918 rv = lockstatus(&ap->a_vp->v_lock); 1919 return rv; 1920 } 1921 1922 int 1923 puffs_generic(void *v) 1924 { 1925 struct vop_generic_args *ap = v; 1926 1927 (void)ap; 1928 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 1929 1930 return EOPNOTSUPP; 1931 } 1932
Indexes created Tue Sep 30 11:09:46 GMT 2025