puffs_vnops.c revision 1.115
1 /* $NetBSD: puffs_vnops.c,v 1.115 2007/11/17 18:09:04 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2005, 2006, 2007 Antti Kantee. All Rights Reserved. 5 * 6 * Development of this software was supported by the 7 * Google Summer of Code program and the Ulla Tuominen Foundation. 8 * The Google SoC project was mentored by Bill Studenmund. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 22 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: puffs_vnops.c,v 1.115 2007/11/17 18:09:04 pooka Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/fstrans.h> 37 #include <sys/malloc.h> 38 #include <sys/mount.h> 39 #include <sys/namei.h> 40 #include <sys/vnode.h> 41 #include <sys/proc.h> 42 43 #include <uvm/uvm.h> 44 45 #include <fs/puffs/puffs_msgif.h> 46 #include <fs/puffs/puffs_sys.h> 47 48 #include <miscfs/fifofs/fifo.h> 49 #include <miscfs/genfs/genfs.h> 50 #include <miscfs/specfs/specdev.h> 51 52 int puffs_lookup(void *); 53 int puffs_create(void *); 54 int puffs_access(void *); 55 int puffs_mknod(void *); 56 int puffs_open(void *); 57 int puffs_close(void *); 58 int puffs_getattr(void *); 59 int puffs_setattr(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 int puffs_getpages(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_open }, /* REAL open */ 114 { &vop_close_desc, puffs_checkop }, /* close */ 115 { &vop_access_desc, puffs_access }, /* REAL 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_fsync_desc, puffs_fsync }, /* REAL fsync */ 121 { &vop_seek_desc, puffs_checkop }, /* seek */ 122 { &vop_remove_desc, puffs_checkop }, /* remove */ 123 { &vop_link_desc, puffs_checkop }, /* link */ 124 { &vop_rename_desc, puffs_checkop }, /* rename */ 125 { &vop_mkdir_desc, puffs_checkop }, /* mkdir */ 126 { &vop_rmdir_desc, puffs_checkop }, /* rmdir */ 127 { &vop_symlink_desc, puffs_checkop }, /* symlink */ 128 { &vop_readdir_desc, puffs_checkop }, /* readdir */ 129 { &vop_readlink_desc, puffs_checkop }, /* readlink */ 130 { &vop_getpages_desc, puffs_checkop }, /* getpages */ 131 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 132 { &vop_pathconf_desc, puffs_checkop }, /* pathconf */ 133 { &vop_advlock_desc, puffs_checkop }, /* advlock */ 134 { &vop_strategy_desc, puffs_strategy }, /* REAL strategy */ 135 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 136 { &vop_abortop_desc, genfs_abortop }, /* REAL abortop */ 137 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 138 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 139 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 140 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 141 { &vop_bmap_desc, puffs_bmap }, /* REAL bmap */ 142 { &vop_print_desc, puffs_print }, /* REAL print */ 143 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 144 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 145 { &vop_mmap_desc, puffs_mmap }, /* REAL mmap */ 146 { &vop_poll_desc, puffs_poll }, /* REAL poll */ 147 148 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 149 { NULL, NULL } 150 }; 151 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 152 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 153 154 155 int (**puffs_specop_p)(void *); 156 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 157 { &vop_default_desc, vn_default_error }, 158 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 159 { &vop_create_desc, spec_create }, /* genfs_badop */ 160 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 161 { &vop_open_desc, spec_open }, /* spec_open */ 162 { &vop_close_desc, spec_close }, /* spec_close */ 163 { &vop_access_desc, puffs_checkop }, /* access */ 164 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 165 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 166 { &vop_read_desc, puffs_spec_read }, /* update, read */ 167 { &vop_write_desc, puffs_spec_write }, /* update, write */ 168 { &vop_lease_desc, spec_lease_check }, /* genfs_nullop */ 169 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 170 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 171 { &vop_poll_desc, spec_poll }, /* spec_poll */ 172 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 173 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 174 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 175 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 176 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 177 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 178 { &vop_link_desc, spec_link }, /* genfs_badop */ 179 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 180 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 181 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 182 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 183 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 184 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 185 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 186 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 187 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 188 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 189 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 190 { &vop_bmap_desc, spec_bmap }, /* dummy */ 191 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 192 { &vop_print_desc, puffs_print }, /* REAL print */ 193 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 194 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 195 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 196 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 197 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 198 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 199 #if 0 200 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 201 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 202 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 203 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 204 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 205 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 206 #endif 207 { NULL, NULL } 208 }; 209 const struct vnodeopv_desc puffs_specop_opv_desc = 210 { &puffs_specop_p, puffs_specop_entries }; 211 212 213 int (**puffs_fifoop_p)(void *); 214 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 215 { &vop_default_desc, vn_default_error }, 216 { &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */ 217 { &vop_create_desc, fifo_create }, /* genfs_badop */ 218 { &vop_mknod_desc, fifo_mknod }, /* genfs_badop */ 219 { &vop_open_desc, fifo_open }, /* open */ 220 { &vop_close_desc, fifo_close }, /* close */ 221 { &vop_access_desc, puffs_checkop }, /* access */ 222 { &vop_getattr_desc, puffs_checkop }, /* getattr */ 223 { &vop_setattr_desc, puffs_checkop }, /* setattr */ 224 { &vop_read_desc, puffs_fifo_read }, /* read, update */ 225 { &vop_write_desc, puffs_fifo_write }, /* write, update */ 226 { &vop_lease_desc, fifo_lease_check }, /* genfs_nullop */ 227 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 228 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 229 { &vop_poll_desc, fifo_poll }, /* poll */ 230 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 231 { &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */ 232 { &vop_mmap_desc, fifo_mmap }, /* genfs_badop */ 233 { &vop_fsync_desc, fifo_fsync }, /* genfs_nullop*/ 234 { &vop_seek_desc, fifo_seek }, /* genfs_badop */ 235 { &vop_remove_desc, fifo_remove }, /* genfs_badop */ 236 { &vop_link_desc, fifo_link }, /* genfs_badop */ 237 { &vop_rename_desc, fifo_rename }, /* genfs_badop */ 238 { &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */ 239 { &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */ 240 { &vop_symlink_desc, fifo_symlink }, /* genfs_badop */ 241 { &vop_readdir_desc, fifo_readdir }, /* genfs_badop */ 242 { &vop_readlink_desc, fifo_readlink }, /* genfs_badop */ 243 { &vop_abortop_desc, fifo_abortop }, /* genfs_badop */ 244 { &vop_inactive_desc, puffs_inactive }, /* REAL inactive */ 245 { &vop_reclaim_desc, puffs_reclaim }, /* REAL reclaim */ 246 { &vop_lock_desc, puffs_lock }, /* REAL lock */ 247 { &vop_unlock_desc, puffs_unlock }, /* REAL unlock */ 248 { &vop_bmap_desc, fifo_bmap }, /* dummy */ 249 { &vop_strategy_desc, fifo_strategy }, /* genfs_badop */ 250 { &vop_print_desc, puffs_print }, /* REAL print */ 251 { &vop_islocked_desc, puffs_islocked }, /* REAL islocked */ 252 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 253 { &vop_advlock_desc, fifo_advlock }, /* genfs_einval */ 254 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 255 { &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/ 256 #if 0 257 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 258 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 259 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 260 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 261 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 262 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 263 #endif 264 { NULL, NULL } 265 }; 266 const struct vnodeopv_desc puffs_fifoop_opv_desc = 267 { &puffs_fifoop_p, puffs_fifoop_entries }; 268 269 270 /* "real" vnode operations */ 271 int (**puffs_msgop_p)(void *); 272 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 273 { &vop_default_desc, vn_default_error }, 274 { &vop_create_desc, puffs_create }, /* create */ 275 { &vop_mknod_desc, puffs_mknod }, /* mknod */ 276 { &vop_open_desc, puffs_open }, /* open */ 277 { &vop_close_desc, puffs_close }, /* close */ 278 { &vop_access_desc, puffs_access }, /* access */ 279 { &vop_getattr_desc, puffs_getattr }, /* getattr */ 280 { &vop_setattr_desc, puffs_setattr }, /* setattr */ 281 { &vop_read_desc, puffs_read }, /* read */ 282 { &vop_write_desc, puffs_write }, /* write */ 283 { &vop_seek_desc, puffs_seek }, /* seek */ 284 { &vop_remove_desc, puffs_remove }, /* remove */ 285 { &vop_link_desc, puffs_link }, /* link */ 286 { &vop_rename_desc, puffs_rename }, /* rename */ 287 { &vop_mkdir_desc, puffs_mkdir }, /* mkdir */ 288 { &vop_rmdir_desc, puffs_rmdir }, /* rmdir */ 289 { &vop_symlink_desc, puffs_symlink }, /* symlink */ 290 { &vop_readdir_desc, puffs_readdir }, /* readdir */ 291 { &vop_readlink_desc, puffs_readlink }, /* readlink */ 292 { &vop_print_desc, puffs_print }, /* print */ 293 { &vop_islocked_desc, puffs_islocked }, /* islocked */ 294 { &vop_pathconf_desc, puffs_pathconf }, /* pathconf */ 295 { &vop_advlock_desc, puffs_advlock }, /* advlock */ 296 { &vop_getpages_desc, puffs_getpages }, /* getpages */ 297 { NULL, NULL } 298 }; 299 const struct vnodeopv_desc puffs_msgop_opv_desc = 300 { &puffs_msgop_p, puffs_msgop_entries }; 301 302 303 #define ERROUT(err) \ 304 do { \ 305 error = err; \ 306 goto out; \ 307 } while (/*CONSTCOND*/0) 308 309 /* 310 * This is a generic vnode operation handler. It checks if the necessary 311 * operations for the called vnode operation are implemented by userspace 312 * and either returns a dummy return value or proceeds to call the real 313 * vnode operation from puffs_msgop_v. 314 * 315 * XXX: this should described elsewhere and autogenerated, the complexity 316 * of the vnode operations vectors and their interrelationships is also 317 * getting a bit out of hand. Another problem is that we need this same 318 * information in the fs server code, so keeping the two in sync manually 319 * is not a viable (long term) plan. 320 */ 321 322 /* not supported, handle locking protocol */ 323 #define CHECKOP_NOTSUPP(op) \ 324 case VOP_##op##_DESCOFFSET: \ 325 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 326 return genfs_eopnotsupp(v); \ 327 break 328 329 /* always succeed, no locking */ 330 #define CHECKOP_SUCCESS(op) \ 331 case VOP_##op##_DESCOFFSET: \ 332 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 333 return 0; \ 334 break 335 336 int 337 puffs_checkop(void *v) 338 { 339 struct vop_generic_args /* { 340 struct vnodeop_desc *a_desc; 341 spooky mystery contents; 342 } */ *ap = v; 343 struct vnodeop_desc *desc = ap->a_desc; 344 struct puffs_mount *pmp; 345 struct vnode *vp; 346 int offset, rv; 347 348 offset = ap->a_desc->vdesc_vp_offsets[0]; 349 #ifdef DIAGNOSTIC 350 if (offset == VDESC_NO_OFFSET) 351 panic("puffs_checkop: no vnode, why did you call me?"); 352 #endif 353 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 354 pmp = MPTOPUFFSMP(vp->v_mount); 355 356 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 357 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 358 359 if (!ALLOPS(pmp)) { 360 switch (desc->vdesc_offset) { 361 CHECKOP_NOTSUPP(CREATE); 362 CHECKOP_NOTSUPP(MKNOD); 363 CHECKOP_NOTSUPP(GETATTR); 364 CHECKOP_NOTSUPP(SETATTR); 365 CHECKOP_NOTSUPP(READ); 366 CHECKOP_NOTSUPP(WRITE); 367 CHECKOP_NOTSUPP(FCNTL); 368 CHECKOP_NOTSUPP(IOCTL); 369 CHECKOP_NOTSUPP(REMOVE); 370 CHECKOP_NOTSUPP(LINK); 371 CHECKOP_NOTSUPP(RENAME); 372 CHECKOP_NOTSUPP(MKDIR); 373 CHECKOP_NOTSUPP(RMDIR); 374 CHECKOP_NOTSUPP(SYMLINK); 375 CHECKOP_NOTSUPP(READDIR); 376 CHECKOP_NOTSUPP(READLINK); 377 CHECKOP_NOTSUPP(PRINT); 378 CHECKOP_NOTSUPP(PATHCONF); 379 CHECKOP_NOTSUPP(ADVLOCK); 380 381 CHECKOP_SUCCESS(ACCESS); 382 CHECKOP_SUCCESS(CLOSE); 383 CHECKOP_SUCCESS(SEEK); 384 385 case VOP_GETPAGES_DESCOFFSET: 386 if (!EXISTSOP(pmp, READ)) 387 return genfs_eopnotsupp(v); 388 break; 389 390 default: 391 panic("puffs_checkop: unhandled vnop %d", 392 desc->vdesc_offset); 393 } 394 } 395 396 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 397 398 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 399 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 400 401 return rv; 402 } 403 404 static int puffs_callremove(struct puffs_mount *, void *, void *, 405 struct componentname *); 406 static int puffs_callrmdir(struct puffs_mount *, void *, void *, 407 struct componentname *); 408 static void puffs_callinactive(struct puffs_mount *, void *, int, struct lwp *); 409 static void puffs_callreclaim(struct puffs_mount *, void *, struct lwp *); 410 411 #define PUFFS_ABORT_LOOKUP 1 412 #define PUFFS_ABORT_CREATE 2 413 #define PUFFS_ABORT_MKNOD 3 414 #define PUFFS_ABORT_MKDIR 4 415 #define PUFFS_ABORT_SYMLINK 5 416 417 /* 418 * Press the pani^Wabort button! Kernel resource allocation failed. 419 */ 420 static void 421 puffs_abortbutton(struct puffs_mount *pmp, int what, 422 void *dcookie, void *cookie, struct componentname *cnp) 423 { 424 425 switch (what) { 426 case PUFFS_ABORT_CREATE: 427 case PUFFS_ABORT_MKNOD: 428 case PUFFS_ABORT_SYMLINK: 429 puffs_callremove(pmp, dcookie, cookie, cnp); 430 break; 431 case PUFFS_ABORT_MKDIR: 432 puffs_callrmdir(pmp, dcookie, cookie, cnp); 433 break; 434 } 435 436 puffs_callinactive(pmp, cookie, 0, cnp->cn_lwp); 437 puffs_callreclaim(pmp, cookie, cnp->cn_lwp); 438 } 439 440 int 441 puffs_lookup(void *v) 442 { 443 struct vop_lookup_args /* { 444 const struct vnodeop_desc *a_desc; 445 struct vnode *a_dvp; 446 struct vnode **a_vpp; 447 struct componentname *a_cnp; 448 } */ *ap = v; 449 PUFFS_MSG_VARS(vn, lookup); 450 struct puffs_mount *pmp; 451 struct componentname *cnp; 452 struct vnode *vp, *dvp; 453 struct puffs_node *dpn; 454 int isdot; 455 int error; 456 457 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 458 cnp = ap->a_cnp; 459 dvp = ap->a_dvp; 460 *ap->a_vpp = NULL; 461 462 /* r/o fs? we check create later to handle EEXIST */ 463 if ((cnp->cn_flags & ISLASTCN) 464 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 465 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 466 return EROFS; 467 468 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 469 470 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 471 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 472 473 /* 474 * Check if someone fed it into the cache 475 */ 476 if (PUFFS_USE_NAMECACHE(pmp)) { 477 error = cache_lookup(dvp, ap->a_vpp, cnp); 478 479 if (error >= 0) 480 return error; 481 } 482 483 if (isdot) { 484 vp = ap->a_dvp; 485 vref(vp); 486 *ap->a_vpp = vp; 487 return 0; 488 } 489 490 PUFFS_MSG_ALLOC(vn, lookup); 491 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 492 &lookup_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 493 494 if (cnp->cn_flags & ISDOTDOT) 495 VOP_UNLOCK(dvp, 0); 496 497 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 498 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 499 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 500 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 501 502 /* 503 * In case of error, there is no new vnode to play with, so be 504 * happy with the NULL value given to vpp in the beginning. 505 * Also, check if this really was an error or the target was not 506 * present. Either treat it as a non-error for CREATE/RENAME or 507 * enter the component into the negative name cache (if desired). 508 */ 509 if (error) { 510 error = checkerr(pmp, error, __func__); 511 if (error == ENOENT) { 512 /* don't allow to create files on r/o fs */ 513 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 514 && cnp->cn_nameiop == CREATE) { 515 error = EROFS; 516 517 /* adjust values if we are creating */ 518 } else if ((cnp->cn_flags & ISLASTCN) 519 && (cnp->cn_nameiop == CREATE 520 || cnp->cn_nameiop == RENAME)) { 521 cnp->cn_flags |= SAVENAME; 522 error = EJUSTRETURN; 523 524 /* save negative cache entry */ 525 } else { 526 if ((cnp->cn_flags & MAKEENTRY) 527 && PUFFS_USE_NAMECACHE(pmp)) 528 cache_enter(dvp, NULL, cnp); 529 } 530 } 531 goto out; 532 } 533 534 /* 535 * Check that we don't get our parent node back, that would cause 536 * a pretty obvious deadlock. 537 */ 538 dpn = dvp->v_data; 539 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 540 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 541 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 542 error = EPROTO; 543 goto out; 544 } 545 546 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 1, 1, &vp); 547 if (error == PUFFS_NOSUCHCOOKIE) { 548 error = puffs_getvnode(dvp->v_mount, 549 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 550 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 551 if (error) { 552 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 553 lookup_msg->pvnr_newnode, ap->a_cnp); 554 goto out; 555 } 556 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 557 } else if (error) { 558 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 559 lookup_msg->pvnr_newnode, ap->a_cnp); 560 goto out; 561 } 562 563 *ap->a_vpp = vp; 564 565 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_USE_NAMECACHE(pmp)) 566 cache_enter(dvp, vp, cnp); 567 568 /* XXX */ 569 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 570 cnp->cn_flags &= ~REQUIREDIR; 571 if (lookup_msg->pvnr_cn.pkcn_consume) 572 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 573 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 574 575 out: 576 if (cnp->cn_flags & ISDOTDOT) 577 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 578 579 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 580 PUFFS_MSG_RELEASE(lookup); 581 return error; 582 } 583 584 int 585 puffs_create(void *v) 586 { 587 struct vop_create_args /* { 588 const struct vnodeop_desc *a_desc; 589 struct vnode *a_dvp; 590 struct vnode **a_vpp; 591 struct componentname *a_cnp; 592 struct vattr *a_vap; 593 } */ *ap = v; 594 PUFFS_MSG_VARS(vn, create); 595 struct vnode *dvp = ap->a_dvp; 596 struct componentname *cnp = ap->a_cnp; 597 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 598 int error; 599 600 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 601 dvp, ap->a_cnp->cn_nameptr)); 602 603 PUFFS_MSG_ALLOC(vn, create); 604 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 605 &create_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 606 create_msg->pvnr_va = *ap->a_vap; 607 puffs_msg_setinfo(park_create, PUFFSOP_VN, 608 PUFFS_VN_CREATE, VPTOPNC(dvp)); 609 610 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 611 error = checkerr(pmp, error, __func__); 612 if (error) 613 goto out; 614 615 error = puffs_newnode(dvp->v_mount, dvp, ap->a_vpp, 616 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 617 if (error) 618 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, VPTOPNC(dvp), 619 create_msg->pvnr_newnode, cnp); 620 621 out: 622 if (error || (cnp->cn_flags & SAVESTART) == 0) 623 PNBUF_PUT(cnp->cn_pnbuf); 624 vput(dvp); 625 626 DPRINTF(("puffs_create: return %d\n", error)); 627 PUFFS_MSG_RELEASE(create); 628 return error; 629 } 630 631 int 632 puffs_mknod(void *v) 633 { 634 struct vop_mknod_args /* { 635 const struct vnodeop_desc *a_desc; 636 struct vnode *a_dvp; 637 struct vnode **a_vpp; 638 struct componentname *a_cnp; 639 struct vattr *a_vap; 640 } */ *ap = v; 641 PUFFS_MSG_VARS(vn, mknod); 642 struct vnode *dvp = ap->a_dvp; 643 struct componentname *cnp = ap->a_cnp; 644 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 645 int error; 646 647 PUFFS_MSG_ALLOC(vn, mknod); 648 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 649 &mknod_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 650 mknod_msg->pvnr_va = *ap->a_vap; 651 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 652 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 653 654 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 655 error = checkerr(pmp, error, __func__); 656 if (error) 657 goto out; 658 659 error = puffs_newnode(dvp->v_mount, dvp, ap->a_vpp, 660 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 661 ap->a_vap->va_rdev); 662 if (error) 663 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, VPTOPNC(dvp), 664 mknod_msg->pvnr_newnode, cnp); 665 666 out: 667 PUFFS_MSG_RELEASE(mknod); 668 if (error || (cnp->cn_flags & SAVESTART) == 0) 669 PNBUF_PUT(cnp->cn_pnbuf); 670 vput(dvp); 671 return error; 672 } 673 674 int 675 puffs_open(void *v) 676 { 677 struct vop_open_args /* { 678 const struct vnodeop_desc *a_desc; 679 struct vnode *a_vp; 680 int a_mode; 681 kauth_cred_t a_cred; 682 struct lwp *a_l; 683 } */ *ap = v; 684 PUFFS_MSG_VARS(vn, open); 685 struct vnode *vp = ap->a_vp; 686 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 687 int mode = ap->a_mode; 688 int error; 689 690 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 691 692 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 693 ERROUT(EROFS); 694 695 if (!EXISTSOP(pmp, OPEN)) 696 ERROUT(0); 697 698 PUFFS_MSG_ALLOC(vn, open); 699 open_msg->pvnr_mode = mode; 700 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 701 puffs_cidcvt(&open_msg->pvnr_cid, ap->a_l); 702 puffs_msg_setinfo(park_open, PUFFSOP_VN, 703 PUFFS_VN_OPEN, VPTOPNC(vp)); 704 705 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 706 error = checkerr(pmp, error, __func__); 707 708 out: 709 DPRINTF(("puffs_open: returning %d\n", error)); 710 PUFFS_MSG_RELEASE(open); 711 return error; 712 } 713 714 int 715 puffs_close(void *v) 716 { 717 struct vop_close_args /* { 718 const struct vnodeop_desc *a_desc; 719 struct vnode *a_vp; 720 int a_fflag; 721 kauth_cred_t a_cred; 722 struct lwp *a_l; 723 } */ *ap = v; 724 PUFFS_MSG_VARS(vn, close); 725 struct vnode *vp = ap->a_vp; 726 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 727 728 PUFFS_MSG_ALLOC(vn, close); 729 puffs_msg_setfaf(park_close); 730 close_msg->pvnr_fflag = ap->a_fflag; 731 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 732 puffs_cidcvt(&close_msg->pvnr_cid, ap->a_l); 733 puffs_msg_setinfo(park_close, PUFFSOP_VN, 734 PUFFS_VN_CLOSE, VPTOPNC(vp)); 735 736 puffs_msg_enqueue(pmp, park_close); 737 PUFFS_MSG_RELEASE(close); 738 return 0; 739 } 740 741 int 742 puffs_access(void *v) 743 { 744 struct vop_access_args /* { 745 const struct vnodeop_desc *a_desc; 746 struct vnode *a_vp; 747 int a_mode; 748 kauth_cred_t a_cred; 749 struct lwp *a_l; 750 } */ *ap = v; 751 PUFFS_MSG_VARS(vn, access); 752 struct vnode *vp = ap->a_vp; 753 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 754 int mode = ap->a_mode; 755 int error; 756 757 if (mode & VWRITE) { 758 switch (vp->v_type) { 759 case VDIR: 760 case VLNK: 761 case VREG: 762 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 763 || !EXISTSOP(pmp, WRITE)) 764 return EROFS; 765 break; 766 default: 767 break; 768 } 769 } 770 771 if (!EXISTSOP(pmp, ACCESS)) 772 return 0; 773 774 PUFFS_MSG_ALLOC(vn, access); 775 access_msg->pvnr_mode = ap->a_mode; 776 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 777 puffs_cidcvt(&access_msg->pvnr_cid, ap->a_l); 778 puffs_msg_setinfo(park_access, PUFFSOP_VN, 779 PUFFS_VN_ACCESS, VPTOPNC(vp)); 780 781 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 782 error = checkerr(pmp, error, __func__); 783 PUFFS_MSG_RELEASE(access); 784 785 return error; 786 } 787 788 int 789 puffs_getattr(void *v) 790 { 791 struct vop_getattr_args /* { 792 const struct vnodeop_desc *a_desc; 793 struct vnode *a_vp; 794 struct vattr *a_vap; 795 kauth_cred_t a_cred; 796 struct lwp *a_l; 797 } */ *ap = v; 798 PUFFS_MSG_VARS(vn, getattr); 799 struct vnode *vp = ap->a_vp; 800 struct mount *mp = vp->v_mount; 801 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 802 struct vattr *vap, *rvap; 803 struct puffs_node *pn; 804 int error = 0; 805 806 vap = ap->a_vap; 807 808 PUFFS_MSG_ALLOC(vn, getattr); 809 vattr_null(&getattr_msg->pvnr_va); 810 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 811 puffs_cidcvt(&getattr_msg->pvnr_cid, ap->a_l); 812 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 813 PUFFS_VN_GETATTR, VPTOPNC(vp)); 814 815 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 816 error = checkerr(pmp, error, __func__); 817 if (error) 818 goto out; 819 820 rvap = &getattr_msg->pvnr_va; 821 /* 822 * Don't listen to the file server regarding special device 823 * size info, the file server doesn't know anything about them. 824 */ 825 if (vp->v_type == VBLK || vp->v_type == VCHR) 826 rvap->va_size = vp->v_size; 827 828 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 829 if (vp->v_type == VBLK) 830 rvap->va_blocksize = BLKDEV_IOSIZE; 831 else if (vp->v_type == VCHR) 832 rvap->va_blocksize = MAXBSIZE; 833 834 (void) memcpy(vap, rvap, sizeof(struct vattr)); 835 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 836 837 pn = VPTOPP(vp); 838 if (pn->pn_stat & PNODE_METACACHE_ATIME) 839 vap->va_atime = pn->pn_mc_atime; 840 if (pn->pn_stat & PNODE_METACACHE_CTIME) 841 vap->va_ctime = pn->pn_mc_ctime; 842 if (pn->pn_stat & PNODE_METACACHE_MTIME) 843 vap->va_mtime = pn->pn_mc_mtime; 844 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 845 vap->va_size = pn->pn_mc_size; 846 } else { 847 if (rvap->va_size != VNOVAL 848 && vp->v_type != VBLK && vp->v_type != VCHR) { 849 uvm_vnp_setsize(vp, rvap->va_size); 850 pn->pn_serversize = rvap->va_size; 851 } 852 } 853 854 out: 855 PUFFS_MSG_RELEASE(getattr); 856 return error; 857 } 858 859 static int 860 puffs_dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, 861 struct lwp *l, int chsize) 862 { 863 PUFFS_MSG_VARS(vn, setattr); 864 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 865 struct puffs_node *pn = vp->v_data; 866 int error; 867 868 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 869 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 870 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 871 || vap->va_mode != (mode_t)VNOVAL)) 872 return EROFS; 873 874 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 875 && vp->v_type == VREG && vap->va_size != VNOVAL) 876 return EROFS; 877 878 /* 879 * Flush metacache first. If we are called with some explicit 880 * parameters, treat them as information overriding metacache 881 * information. 882 */ 883 if (pn->pn_stat & PNODE_METACACHE_MASK) { 884 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 885 && vap->va_atime.tv_sec == VNOVAL) 886 vap->va_atime = pn->pn_mc_atime; 887 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 888 && vap->va_ctime.tv_sec == VNOVAL) 889 vap->va_ctime = pn->pn_mc_ctime; 890 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 891 && vap->va_mtime.tv_sec == VNOVAL) 892 vap->va_mtime = pn->pn_mc_mtime; 893 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 894 && vap->va_size == VNOVAL) 895 vap->va_size = pn->pn_mc_size; 896 897 pn->pn_stat &= ~PNODE_METACACHE_MASK; 898 } 899 900 PUFFS_MSG_ALLOC(vn, setattr); 901 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 902 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 903 puffs_cidcvt(&setattr_msg->pvnr_cid, l); 904 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 905 PUFFS_VN_SETATTR, VPTOPNC(vp)); 906 907 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setattr, vp->v_data, NULL, error); 908 PUFFS_MSG_RELEASE(setattr); 909 error = checkerr(pmp, error, __func__); 910 if (error) 911 return error; 912 913 if (vap->va_size != VNOVAL) { 914 pn->pn_serversize = vap->va_size; 915 if (chsize) 916 uvm_vnp_setsize(vp, vap->va_size); 917 } 918 919 return 0; 920 } 921 922 int 923 puffs_setattr(void *v) 924 { 925 struct vop_getattr_args /* { 926 const struct vnodeop_desc *a_desc; 927 struct vnode *a_vp; 928 struct vattr *a_vap; 929 kauth_cred_t a_cred; 930 struct lwp *a_l; 931 } */ *ap = v; 932 933 return puffs_dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, ap->a_l, 1); 934 } 935 936 static __inline int 937 doinact(struct puffs_mount *pmp, int iaflag) 938 { 939 940 if (EXISTSOP(pmp, INACTIVE)) 941 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 942 if (iaflag || ALLOPS(pmp)) 943 return 1; 944 else 945 return 0; 946 else 947 return 1; 948 else 949 return 0; 950 } 951 952 static void 953 puffs_callinactive(struct puffs_mount *pmp, void *cookie, int iaflag, 954 struct lwp *l) 955 { 956 int error; 957 PUFFS_MSG_VARS(vn, inactive); 958 959 if (doinact(pmp, iaflag)) { 960 PUFFS_MSG_ALLOC(vn, inactive); 961 puffs_cidcvt(&inactive_msg->pvnr_cid, l); 962 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 963 PUFFS_VN_INACTIVE, cookie); 964 965 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 966 PUFFS_MSG_RELEASE(inactive); 967 } 968 } 969 970 /* XXX: callinactive can't setback */ 971 int 972 puffs_inactive(void *v) 973 { 974 struct vop_inactive_args /* { 975 const struct vnodeop_desc *a_desc; 976 struct vnode *a_vp; 977 struct lwp *a_l; 978 } */ *ap = v; 979 PUFFS_MSG_VARS(vn, inactive); 980 struct vnode *vp = ap->a_vp; 981 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 982 struct puffs_node *pnode; 983 int error; 984 985 pnode = vp->v_data; 986 987 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 988 PUFFS_MSG_ALLOC(vn, inactive); 989 puffs_cidcvt(&inactive_msg->pvnr_cid, ap->a_l); 990 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 991 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 992 993 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 994 NULL, error); 995 PUFFS_MSG_RELEASE(inactive); 996 } 997 pnode->pn_stat &= ~PNODE_DOINACT; 998 999 VOP_UNLOCK(vp, 0); 1000 1001 /* 1002 * file server thinks it's gone? then don't be afraid care, 1003 * node's life was already all it would ever be 1004 */ 1005 if (pnode->pn_stat & PNODE_NOREFS) { 1006 pnode->pn_stat |= PNODE_DYING; 1007 vrecycle(vp, NULL, ap->a_l); 1008 } 1009 1010 return 0; 1011 } 1012 1013 static void 1014 puffs_callreclaim(struct puffs_mount *pmp, void *cookie, struct lwp *l) 1015 { 1016 PUFFS_MSG_VARS(vn, reclaim); 1017 1018 if (!EXISTSOP(pmp, RECLAIM)) 1019 return; 1020 1021 PUFFS_MSG_ALLOC(vn, reclaim); 1022 puffs_msg_setfaf(park_reclaim); 1023 puffs_cidcvt(&reclaim_msg->pvnr_cid, l); 1024 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, cookie); 1025 1026 puffs_msg_enqueue(pmp, park_reclaim); 1027 PUFFS_MSG_RELEASE(reclaim); 1028 } 1029 1030 /* 1031 * always FAF, we don't really care if the server wants to fail to 1032 * reclaim the node or not 1033 */ 1034 int 1035 puffs_reclaim(void *v) 1036 { 1037 struct vop_reclaim_args /* { 1038 const struct vnodeop_desc *a_desc; 1039 struct vnode *a_vp; 1040 struct lwp *a_l; 1041 } */ *ap = v; 1042 struct vnode *vp = ap->a_vp; 1043 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1044 1045 /* 1046 * first things first: check if someone is trying to reclaim the 1047 * root vnode. do not allow that to travel to userspace. 1048 * Note that we don't need to take the lock similarly to 1049 * puffs_root(), since there is only one of us. 1050 */ 1051 if (vp->v_vflag & VV_ROOT) { 1052 mutex_enter(&pmp->pmp_lock); 1053 KASSERT(pmp->pmp_root != NULL); 1054 pmp->pmp_root = NULL; 1055 mutex_exit(&pmp->pmp_lock); 1056 goto out; 1057 } 1058 1059 puffs_callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), ap->a_l); 1060 1061 out: 1062 if (PUFFS_USE_NAMECACHE(pmp)) 1063 cache_purge(vp); 1064 puffs_putvnode(vp); 1065 1066 return 0; 1067 } 1068 1069 #define CSIZE sizeof(**ap->a_cookies) 1070 int 1071 puffs_readdir(void *v) 1072 { 1073 struct vop_readdir_args /* { 1074 const struct vnodeop_desc *a_desc; 1075 struct vnode *a_vp; 1076 struct uio *a_uio; 1077 kauth_cred_t a_cred; 1078 int *a_eofflag; 1079 off_t **a_cookies; 1080 int *a_ncookies; 1081 } */ *ap = v; 1082 PUFFS_MSG_VARS(vn, readdir); 1083 struct vnode *vp = ap->a_vp; 1084 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1085 size_t argsize, tomove, cookiemem, cookiesmax; 1086 struct uio *uio = ap->a_uio; 1087 size_t howmuch, resid; 1088 int error; 1089 1090 /* 1091 * ok, so we need: resid + cookiemem = maxreq 1092 * => resid + cookiesize * (resid/minsize) = maxreq 1093 * => resid + cookiesize/minsize * resid = maxreq 1094 * => (cookiesize/minsize + 1) * resid = maxreq 1095 * => resid = maxreq / (cookiesize/minsize + 1) 1096 * 1097 * Since cookiesize <= minsize and we're not very big on floats, 1098 * we approximate that to be 1. Therefore: 1099 * 1100 * resid = maxreq / 2; 1101 * 1102 * Well, at least we didn't have to use differential equations 1103 * or the Gram-Schmidt process. 1104 * 1105 * (yes, I'm very afraid of this) 1106 */ 1107 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1108 1109 if (ap->a_cookies) { 1110 KASSERT(ap->a_ncookies != NULL); 1111 if (pmp->pmp_args.pa_fhsize == 0) 1112 return EOPNOTSUPP; 1113 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1114 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1115 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1116 } else { 1117 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1118 cookiesmax = 0; 1119 cookiemem = 0; 1120 } 1121 1122 argsize = sizeof(struct puffs_vnmsg_readdir); 1123 tomove = resid + cookiemem; 1124 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1125 (void **)&readdir_msg, 1); 1126 1127 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1128 readdir_msg->pvnr_offset = uio->uio_offset; 1129 readdir_msg->pvnr_resid = resid; 1130 readdir_msg->pvnr_ncookies = cookiesmax; 1131 readdir_msg->pvnr_eofflag = 0; 1132 readdir_msg->pvnr_dentoff = cookiemem; 1133 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1134 PUFFS_VN_READDIR, VPTOPNC(vp)); 1135 puffs_msg_setdelta(park_readdir, tomove); 1136 1137 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1138 error = checkerr(pmp, error, __func__); 1139 if (error) 1140 goto out; 1141 1142 /* userspace is cheating? */ 1143 if (readdir_msg->pvnr_resid > resid) { 1144 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1145 "resid grew", VPTOPNC(vp)); 1146 ERROUT(EPROTO); 1147 } 1148 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1149 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1150 "too many cookies", VPTOPNC(vp)); 1151 ERROUT(EPROTO); 1152 } 1153 1154 /* check eof */ 1155 if (readdir_msg->pvnr_eofflag) 1156 *ap->a_eofflag = 1; 1157 1158 /* bouncy-wouncy with the directory data */ 1159 howmuch = resid - readdir_msg->pvnr_resid; 1160 1161 /* force eof if no data was returned (getcwd() needs this) */ 1162 if (howmuch == 0) { 1163 *ap->a_eofflag = 1; 1164 goto out; 1165 } 1166 1167 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1168 if (error) 1169 goto out; 1170 1171 /* provide cookies to caller if so desired */ 1172 if (ap->a_cookies) { 1173 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1174 M_TEMP, M_WAITOK); 1175 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1176 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1177 *ap->a_ncookies*CSIZE); 1178 } 1179 1180 /* next readdir starts here */ 1181 uio->uio_offset = readdir_msg->pvnr_offset; 1182 1183 out: 1184 puffs_msgmem_release(park_readdir); 1185 return error; 1186 } 1187 #undef CSIZE 1188 1189 /* 1190 * poll works by consuming the bitmask in pn_revents. If there are 1191 * events available, poll returns immediately. If not, it issues a 1192 * poll to userspace, selrecords itself and returns with no available 1193 * events. When the file server returns, it executes puffs_parkdone_poll(), 1194 * where available events are added to the bitmask. selnotify() is 1195 * then also executed by that function causing us to enter here again 1196 * and hopefully find the missing bits (unless someone got them first, 1197 * in which case it starts all over again). 1198 */ 1199 int 1200 puffs_poll(void *v) 1201 { 1202 struct vop_poll_args /* { 1203 const struct vnodeop_desc *a_desc; 1204 struct vnode *a_vp; 1205 int a_events; 1206 struct lwp *a_l; 1207 }*/ *ap = v; 1208 PUFFS_MSG_VARS(vn, poll); 1209 struct vnode *vp = ap->a_vp; 1210 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1211 struct puffs_node *pn = vp->v_data; 1212 int events, error; 1213 1214 if (EXISTSOP(pmp, POLL)) { 1215 mutex_enter(&pn->pn_mtx); 1216 events = pn->pn_revents & ap->a_events; 1217 if (events & ap->a_events) { 1218 pn->pn_revents &= ~ap->a_events; 1219 mutex_exit(&pn->pn_mtx); 1220 1221 return events; 1222 } else { 1223 puffs_referencenode(pn); 1224 mutex_exit(&pn->pn_mtx); 1225 1226 PUFFS_MSG_ALLOC(vn, poll); 1227 poll_msg->pvnr_events = ap->a_events; 1228 puffs_cidcvt(&poll_msg->pvnr_cid, ap->a_l); 1229 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1230 PUFFS_VN_POLL, VPTOPNC(vp)); 1231 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1232 selrecord(ap->a_l, &pn->pn_sel); 1233 1234 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1235 NULL, error); 1236 PUFFS_MSG_RELEASE(poll); 1237 1238 return 0; 1239 } 1240 } else { 1241 return genfs_poll(v); 1242 } 1243 } 1244 1245 int 1246 puffs_fsync(void *v) 1247 { 1248 struct vop_fsync_args /* { 1249 const struct vnodeop_desc *a_desc; 1250 struct vnode *a_vp; 1251 kauth_cred_t a_cred; 1252 int a_flags; 1253 off_t a_offlo; 1254 off_t a_offhi; 1255 struct lwp *a_l; 1256 } */ *ap = v; 1257 PUFFS_MSG_VARS(vn, fsync); 1258 struct vnode *vp = ap->a_vp; 1259 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1260 struct puffs_node *pn; 1261 struct vattr va; 1262 int pflags, error, dofaf; 1263 1264 pn = VPTOPP(vp); 1265 1266 /* flush out information from our metacache, see vop_setattr */ 1267 if (pn->pn_stat & PNODE_METACACHE_MASK 1268 && (pn->pn_stat & PNODE_DYING) == 0) { 1269 vattr_null(&va); 1270 error = VOP_SETATTR(vp, &va, FSCRED, NULL); 1271 if (error) 1272 return error; 1273 } 1274 1275 /* 1276 * flush pages to avoid being overly dirty 1277 */ 1278 pflags = PGO_CLEANIT; 1279 if (ap->a_flags & FSYNC_WAIT) 1280 pflags |= PGO_SYNCIO; 1281 simple_lock(&vp->v_interlock); 1282 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1283 round_page(ap->a_offhi), pflags); 1284 if (error) 1285 return error; 1286 1287 /* 1288 * HELLO! We exit already here if the user server does not 1289 * support fsync OR if we should call fsync for a node which 1290 * has references neither in the kernel or the fs server. 1291 * Otherwise we continue to issue fsync() forward. 1292 */ 1293 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1294 return 0; 1295 1296 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1297 /* 1298 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1299 * only FAFs for those. Otherwise there's a danger of deadlock, 1300 * since the execution context here might be the user server 1301 * doing some operation on another fs, which in turn caused a 1302 * vnode to be reclaimed from the freelist for this fs. 1303 */ 1304 if (dofaf == 0) { 1305 simple_lock(&vp->v_interlock); 1306 if (vp->v_iflag & VI_XLOCK) 1307 dofaf = 1; 1308 simple_unlock(&vp->v_interlock); 1309 } 1310 1311 PUFFS_MSG_ALLOC(vn, fsync); 1312 if (dofaf) 1313 puffs_msg_setfaf(park_fsync); 1314 1315 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1316 fsync_msg->pvnr_flags = ap->a_flags; 1317 fsync_msg->pvnr_offlo = ap->a_offlo; 1318 fsync_msg->pvnr_offhi = ap->a_offhi; 1319 puffs_cidcvt(&fsync_msg->pvnr_cid, ap->a_l); 1320 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1321 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1322 1323 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1324 PUFFS_MSG_RELEASE(fsync); 1325 1326 error = checkerr(pmp, error, __func__); 1327 1328 return error; 1329 } 1330 1331 int 1332 puffs_seek(void *v) 1333 { 1334 struct vop_seek_args /* { 1335 const struct vnodeop_desc *a_desc; 1336 struct vnode *a_vp; 1337 off_t a_oldoff; 1338 off_t a_newoff; 1339 kauth_cred_t a_cred; 1340 } */ *ap = v; 1341 PUFFS_MSG_VARS(vn, seek); 1342 struct vnode *vp = ap->a_vp; 1343 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1344 int error; 1345 1346 PUFFS_MSG_ALLOC(vn, seek); 1347 seek_msg->pvnr_oldoff = ap->a_oldoff; 1348 seek_msg->pvnr_newoff = ap->a_newoff; 1349 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1350 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1351 PUFFS_VN_SEEK, VPTOPNC(vp)); 1352 1353 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1354 PUFFS_MSG_RELEASE(seek); 1355 return checkerr(pmp, error, __func__); 1356 } 1357 1358 static int 1359 puffs_callremove(struct puffs_mount *pmp, void *dcookie, void *cookie, 1360 struct componentname *cnp) 1361 { 1362 PUFFS_MSG_VARS(vn, remove); 1363 int error; 1364 1365 PUFFS_MSG_ALLOC(vn, remove); 1366 remove_msg->pvnr_cookie_targ = cookie; 1367 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1368 &remove_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1369 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dcookie); 1370 1371 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1372 PUFFS_MSG_RELEASE(remove); 1373 1374 return checkerr(pmp, error, __func__); 1375 } 1376 1377 /* 1378 * XXX: can't use callremove now because can't catch setbacks with 1379 * it due to lack of a vnode argument. 1380 */ 1381 int 1382 puffs_remove(void *v) 1383 { 1384 struct vop_remove_args /* { 1385 const struct vnodeop_desc *a_desc; 1386 struct vnode *a_dvp; 1387 struct vnode *a_vp; 1388 struct componentname *a_cnp; 1389 } */ *ap = v; 1390 PUFFS_MSG_VARS(vn, remove); 1391 struct vnode *dvp = ap->a_dvp; 1392 struct vnode *vp = ap->a_vp; 1393 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1394 struct componentname *cnp = ap->a_cnp; 1395 int error; 1396 1397 PUFFS_MSG_ALLOC(vn, remove); 1398 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1399 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1400 &remove_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1401 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1402 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1403 1404 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_remove, 1405 dvp->v_data, vp->v_data, error); 1406 PUFFS_MSG_RELEASE(remove); 1407 1408 error = checkerr(pmp, error, __func__); 1409 vput(vp); 1410 if (dvp == vp) 1411 vrele(dvp); 1412 else 1413 vput(dvp); 1414 1415 return error; 1416 } 1417 1418 int 1419 puffs_mkdir(void *v) 1420 { 1421 struct vop_mkdir_args /* { 1422 const struct vnodeop_desc *a_desc; 1423 struct vnode *a_dvp; 1424 struct vnode **a_vpp; 1425 struct componentname *a_cnp; 1426 struct vattr *a_vap; 1427 } */ *ap = v; 1428 PUFFS_MSG_VARS(vn, mkdir); 1429 struct vnode *dvp = ap->a_dvp; 1430 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1431 struct componentname *cnp = ap->a_cnp; 1432 int error; 1433 1434 PUFFS_MSG_ALLOC(vn, mkdir); 1435 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1436 &mkdir_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1437 mkdir_msg->pvnr_va = *ap->a_vap; 1438 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1439 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1440 1441 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1442 error = checkerr(pmp, error, __func__); 1443 if (error) 1444 goto out; 1445 1446 error = puffs_newnode(dvp->v_mount, dvp, ap->a_vpp, 1447 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1448 if (error) 1449 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, VPTOPNC(ap->a_dvp), 1450 mkdir_msg->pvnr_newnode, cnp); 1451 1452 out: 1453 PUFFS_MSG_RELEASE(mkdir); 1454 if (error || (cnp->cn_flags & SAVESTART) == 0) 1455 PNBUF_PUT(cnp->cn_pnbuf); 1456 vput(ap->a_dvp); 1457 return error; 1458 } 1459 1460 static int 1461 puffs_callrmdir(struct puffs_mount *pmp, void *dcookie, void *cookie, 1462 struct componentname *cnp) 1463 { 1464 PUFFS_MSG_VARS(vn, rmdir); 1465 int error; 1466 1467 PUFFS_MSG_ALLOC(vn, rmdir); 1468 rmdir_msg->pvnr_cookie_targ = cookie; 1469 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1470 &rmdir_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1471 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dcookie); 1472 1473 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1474 PUFFS_MSG_RELEASE(rmdir); 1475 1476 return checkerr(pmp, error, __func__); 1477 } 1478 1479 int 1480 puffs_rmdir(void *v) 1481 { 1482 struct vop_rmdir_args /* { 1483 const struct vnodeop_desc *a_desc; 1484 struct vnode *a_dvp; 1485 struct vnode *a_vp; 1486 struct componentname *a_cnp; 1487 } */ *ap = v; 1488 PUFFS_MSG_VARS(vn, rmdir); 1489 struct vnode *dvp = ap->a_dvp; 1490 struct vnode *vp = ap->a_vp; 1491 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1492 struct componentname *cnp = ap->a_cnp; 1493 int error; 1494 1495 PUFFS_MSG_ALLOC(vn, rmdir); 1496 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1497 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1498 &rmdir_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1499 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1500 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1501 1502 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rmdir, dvp->v_data, vp->v_data, error); 1503 PUFFS_MSG_RELEASE(rmdir); 1504 1505 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1506 vput(dvp); 1507 vput(vp); 1508 1509 return error; 1510 } 1511 1512 int 1513 puffs_link(void *v) 1514 { 1515 struct vop_link_args /* { 1516 const struct vnodeop_desc *a_desc; 1517 struct vnode *a_dvp; 1518 struct vnode *a_vp; 1519 struct componentname *a_cnp; 1520 }*/ *ap = v; 1521 PUFFS_MSG_VARS(vn, link); 1522 struct vnode *dvp = ap->a_dvp; 1523 struct vnode *vp = ap->a_vp; 1524 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1525 struct componentname *cnp = ap->a_cnp; 1526 int error; 1527 1528 PUFFS_MSG_ALLOC(vn, link); 1529 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1530 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1531 &link_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1532 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1533 PUFFS_VN_LINK, VPTOPNC(dvp)); 1534 1535 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_link, dvp->v_data, NULL, error); 1536 PUFFS_MSG_RELEASE(link); 1537 1538 error = checkerr(pmp, error, __func__); 1539 1540 /* 1541 * XXX: stay in touch with the cache. I don't like this, but 1542 * don't have a better solution either. See also puffs_rename(). 1543 */ 1544 if (error == 0) 1545 puffs_updatenode(vp, PUFFS_UPDATECTIME); 1546 1547 PNBUF_PUT(cnp->cn_pnbuf); 1548 vput(dvp); 1549 1550 return error; 1551 } 1552 1553 int 1554 puffs_symlink(void *v) 1555 { 1556 struct vop_symlink_args /* { 1557 const struct vnodeop_desc *a_desc; 1558 struct vnode *a_dvp; 1559 struct vnode **a_vpp; 1560 struct componentname *a_cnp; 1561 struct vattr *a_vap; 1562 char *a_target; 1563 }*/ *ap = v; 1564 PUFFS_MSG_VARS(vn, symlink); 1565 struct vnode *dvp = ap->a_dvp; 1566 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1567 int error; 1568 1569 *ap->a_vpp = NULL; 1570 1571 PUFFS_MSG_ALLOC(vn, symlink); 1572 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1573 &symlink_msg->pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1574 symlink_msg->pvnr_va = *ap->a_vap; 1575 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1576 sizeof(symlink_msg->pvnr_link)); 1577 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1578 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1579 1580 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 1581 error = checkerr(pmp, error, __func__); 1582 if (error) 1583 goto out; 1584 1585 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1586 symlink_msg->pvnr_newnode, ap->a_cnp, VLNK, 0); 1587 if (error) 1588 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, VPTOPNC(ap->a_dvp), 1589 symlink_msg->pvnr_newnode, ap->a_cnp); 1590 1591 out: 1592 PUFFS_MSG_RELEASE(symlink); 1593 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1594 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1595 vput(ap->a_dvp); 1596 1597 return error; 1598 } 1599 1600 int 1601 puffs_readlink(void *v) 1602 { 1603 struct vop_readlink_args /* { 1604 const struct vnodeop_desc *a_desc; 1605 struct vnode *a_vp; 1606 struct uio *a_uio; 1607 kauth_cred_t a_cred; 1608 } */ *ap = v; 1609 PUFFS_MSG_VARS(vn, readlink); 1610 struct vnode *vp = ap->a_vp; 1611 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1612 size_t linklen; 1613 int error; 1614 1615 PUFFS_MSG_ALLOC(vn, readlink); 1616 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1617 linklen = sizeof(readlink_msg->pvnr_link); 1618 readlink_msg->pvnr_linklen = linklen; 1619 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1620 PUFFS_VN_READLINK, VPTOPNC(vp)); 1621 1622 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1623 error = checkerr(pmp, error, __func__); 1624 if (error) 1625 goto out; 1626 1627 /* bad bad user file server */ 1628 if (readlink_msg->pvnr_linklen > linklen) { 1629 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1630 "linklen too big", VPTOPNC(ap->a_vp)); 1631 error = EPROTO; 1632 goto out; 1633 } 1634 1635 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 1636 ap->a_uio); 1637 out: 1638 PUFFS_MSG_RELEASE(readlink); 1639 return error; 1640 } 1641 1642 int 1643 puffs_rename(void *v) 1644 { 1645 struct vop_rename_args /* { 1646 const struct vnodeop_desc *a_desc; 1647 struct vnode *a_fdvp; 1648 struct vnode *a_fvp; 1649 struct componentname *a_fcnp; 1650 struct vnode *a_tdvp; 1651 struct vnode *a_tvp; 1652 struct componentname *a_tcnp; 1653 }*/ *ap = v; 1654 PUFFS_MSG_VARS(vn, rename); 1655 struct vnode *fdvp = ap->a_fdvp; 1656 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 1657 int error; 1658 1659 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) 1660 ERROUT(EXDEV); 1661 1662 PUFFS_MSG_ALLOC(vn, rename); 1663 rename_msg->pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1664 rename_msg->pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1665 if (ap->a_tvp) 1666 rename_msg->pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1667 else 1668 rename_msg->pvnr_cookie_targ = NULL; 1669 puffs_makecn(&rename_msg->pvnr_cn_src, 1670 &rename_msg->pvnr_cn_src_cred, &rename_msg->pvnr_cn_src_cid, 1671 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1672 puffs_makecn(&rename_msg->pvnr_cn_targ, 1673 &rename_msg->pvnr_cn_targ_cred, &rename_msg->pvnr_cn_targ_cid, 1674 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1675 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 1676 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 1677 1678 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 1679 error = checkerr(pmp, error, __func__); 1680 1681 /* 1682 * XXX: stay in touch with the cache. I don't like this, but 1683 * don't have a better solution either. See also puffs_link(). 1684 */ 1685 if (error == 0) 1686 puffs_updatenode(ap->a_fvp, PUFFS_UPDATECTIME); 1687 1688 out: 1689 PUFFS_MSG_RELEASE(rename); 1690 if (ap->a_tvp != NULL) 1691 vput(ap->a_tvp); 1692 if (ap->a_tdvp == ap->a_tvp) 1693 vrele(ap->a_tdvp); 1694 else 1695 vput(ap->a_tdvp); 1696 1697 vrele(ap->a_fdvp); 1698 vrele(ap->a_fvp); 1699 1700 return error; 1701 } 1702 1703 #define RWARGS(cont, iofl, move, offset, creds) \ 1704 (cont)->pvnr_ioflag = (iofl); \ 1705 (cont)->pvnr_resid = (move); \ 1706 (cont)->pvnr_offset = (offset); \ 1707 puffs_credcvt(&(cont)->pvnr_cred, creds) 1708 1709 int 1710 puffs_read(void *v) 1711 { 1712 struct vop_read_args /* { 1713 const struct vnodeop_desc *a_desc; 1714 struct vnode *a_vp; 1715 struct uio *a_uio; 1716 int a_ioflag; 1717 kauth_cred_t a_cred; 1718 } */ *ap = v; 1719 PUFFS_MSG_VARS(vn, read); 1720 struct vnode *vp = ap->a_vp; 1721 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1722 struct uio *uio = ap->a_uio; 1723 void *win; 1724 size_t tomove, argsize; 1725 vsize_t bytelen; 1726 int error, ubcflags; 1727 1728 read_msg = NULL; 1729 error = 0; 1730 1731 /* std sanity */ 1732 if (uio->uio_resid == 0) 1733 return 0; 1734 if (uio->uio_offset < 0) 1735 return EINVAL; 1736 1737 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1738 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1739 1740 ubcflags = 0; 1741 if (UBC_WANT_UNMAP(vp)) 1742 ubcflags = UBC_UNMAP; 1743 1744 while (uio->uio_resid > 0) { 1745 bytelen = MIN(uio->uio_resid, 1746 vp->v_size - uio->uio_offset); 1747 if (bytelen == 0) 1748 break; 1749 1750 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1751 &bytelen, advice, UBC_READ); 1752 error = uiomove(win, bytelen, uio); 1753 ubc_release(win, ubcflags); 1754 if (error) 1755 break; 1756 } 1757 1758 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1759 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1760 } else { 1761 /* 1762 * in case it's not a regular file or we're operating 1763 * uncached, do read in the old-fashioned style, 1764 * i.e. explicit read operations 1765 */ 1766 1767 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1768 argsize = sizeof(struct puffs_vnmsg_read); 1769 puffs_msgmem_alloc(argsize + tomove, &park_read, 1770 (void **)&read_msg, 1); 1771 1772 error = 0; 1773 while (uio->uio_resid > 0) { 1774 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1775 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 1776 RWARGS(read_msg, ap->a_ioflag, tomove, 1777 uio->uio_offset, ap->a_cred); 1778 puffs_msg_setinfo(park_read, PUFFSOP_VN, 1779 PUFFS_VN_READ, VPTOPNC(vp)); 1780 puffs_msg_setdelta(park_read, tomove); 1781 1782 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 1783 NULL, error); 1784 error = checkerr(pmp, error, __func__); 1785 if (error) 1786 break; 1787 1788 if (read_msg->pvnr_resid > tomove) { 1789 puffs_senderr(pmp, PUFFS_ERR_READ, 1790 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1791 error = EPROTO; 1792 break; 1793 } 1794 1795 error = uiomove(read_msg->pvnr_data, 1796 tomove - read_msg->pvnr_resid, uio); 1797 1798 /* 1799 * in case the file is out of juice, resid from 1800 * userspace is != 0. and the error-case is 1801 * quite obvious 1802 */ 1803 if (error || read_msg->pvnr_resid) 1804 break; 1805 } 1806 1807 puffs_msgmem_release(park_read); 1808 } 1809 1810 return error; 1811 } 1812 1813 /* 1814 * XXX: in case of a failure, this leaves uio in a bad state. 1815 * We could theoretically copy the uio and iovecs and "replay" 1816 * them the right amount after the userspace trip, but don't 1817 * bother for now. 1818 */ 1819 int 1820 puffs_write(void *v) 1821 { 1822 struct vop_write_args /* { 1823 const struct vnodeop_desc *a_desc; 1824 struct vnode *a_vp; 1825 struct uio *a_uio; 1826 int a_ioflag; 1827 kauth_cred_t a_cred; 1828 } */ *ap = v; 1829 PUFFS_MSG_VARS(vn, write); 1830 struct vnode *vp = ap->a_vp; 1831 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1832 struct uio *uio = ap->a_uio; 1833 size_t tomove, argsize; 1834 off_t oldoff, newoff, origoff; 1835 vsize_t bytelen; 1836 int error, uflags; 1837 int ubcflags; 1838 1839 error = uflags = 0; 1840 write_msg = NULL; 1841 1842 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1843 ubcflags = UBC_WRITE | UBC_PARTIALOK; 1844 if (UBC_WANT_UNMAP(vp)) 1845 ubcflags |= UBC_UNMAP; 1846 1847 /* 1848 * userspace *should* be allowed to control this, 1849 * but with UBC it's a bit unclear how to handle it 1850 */ 1851 if (ap->a_ioflag & IO_APPEND) 1852 uio->uio_offset = vp->v_size; 1853 1854 origoff = uio->uio_offset; 1855 while (uio->uio_resid > 0) { 1856 uflags |= PUFFS_UPDATECTIME; 1857 uflags |= PUFFS_UPDATEMTIME; 1858 oldoff = uio->uio_offset; 1859 bytelen = uio->uio_resid; 1860 1861 newoff = oldoff + bytelen; 1862 if (vp->v_size < newoff) { 1863 uvm_vnp_setwritesize(vp, newoff); 1864 } 1865 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1866 UVM_ADV_RANDOM, ubcflags); 1867 1868 /* 1869 * In case of a ubc_uiomove() error, 1870 * opt to not extend the file at all and 1871 * return an error. Otherwise, if we attempt 1872 * to clear the memory we couldn't fault to, 1873 * we might generate a kernel page fault. 1874 */ 1875 if (vp->v_size < newoff) { 1876 if (error == 0) { 1877 uflags |= PUFFS_UPDATESIZE; 1878 uvm_vnp_setsize(vp, newoff); 1879 } else { 1880 uvm_vnp_setwritesize(vp, vp->v_size); 1881 } 1882 } 1883 if (error) 1884 break; 1885 1886 /* 1887 * If we're writing large files, flush to file server 1888 * every 64k. Otherwise we can very easily exhaust 1889 * kernel and user memory, as the file server cannot 1890 * really keep up with our writing speed. 1891 * 1892 * Note: this does *NOT* honor MNT_ASYNC, because 1893 * that gives userland too much say in the kernel. 1894 */ 1895 if (oldoff >> 16 != uio->uio_offset >> 16) { 1896 simple_lock(&vp->v_interlock); 1897 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1898 uio->uio_offset & ~0xffff, 1899 PGO_CLEANIT | PGO_SYNCIO); 1900 if (error) 1901 break; 1902 } 1903 } 1904 1905 /* synchronous I/O? */ 1906 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1907 simple_lock(&vp->v_interlock); 1908 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1909 round_page(uio->uio_offset), 1910 PGO_CLEANIT | PGO_SYNCIO); 1911 1912 /* write through page cache? */ 1913 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1914 simple_lock(&vp->v_interlock); 1915 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1916 round_page(uio->uio_offset), PGO_CLEANIT); 1917 } 1918 1919 puffs_updatenode(vp, uflags); 1920 } else { 1921 /* tomove is non-increasing */ 1922 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1923 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 1924 puffs_msgmem_alloc(argsize, &park_write, (void **)&write_msg,1); 1925 1926 while (uio->uio_resid > 0) { 1927 /* move data to buffer */ 1928 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1929 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 1930 RWARGS(write_msg, ap->a_ioflag, tomove, 1931 uio->uio_offset, ap->a_cred); 1932 error = uiomove(write_msg->pvnr_data, tomove, uio); 1933 if (error) 1934 break; 1935 1936 /* move buffer to userspace */ 1937 puffs_msg_setinfo(park_write, PUFFSOP_VN, 1938 PUFFS_VN_WRITE, VPTOPNC(vp)); 1939 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 1940 NULL, error); 1941 error = checkerr(pmp, error, __func__); 1942 if (error) 1943 break; 1944 1945 if (write_msg->pvnr_resid > tomove) { 1946 puffs_senderr(pmp, PUFFS_ERR_WRITE, 1947 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1948 error = EPROTO; 1949 break; 1950 } 1951 1952 /* adjust file size */ 1953 if (vp->v_size < uio->uio_offset) 1954 uvm_vnp_setsize(vp, uio->uio_offset); 1955 1956 /* didn't move everything? bad userspace. bail */ 1957 if (write_msg->pvnr_resid != 0) { 1958 error = EIO; 1959 break; 1960 } 1961 } 1962 puffs_msgmem_release(park_write); 1963 } 1964 1965 return error; 1966 } 1967 1968 int 1969 puffs_print(void *v) 1970 { 1971 struct vop_print_args /* { 1972 struct vnode *a_vp; 1973 } */ *ap = v; 1974 PUFFS_MSG_VARS(vn, print); 1975 struct vnode *vp = ap->a_vp; 1976 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1977 struct puffs_node *pn = vp->v_data; 1978 int error; 1979 1980 /* kernel portion */ 1981 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1982 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1983 if (vp->v_type == VFIFO) 1984 fifo_printinfo(vp); 1985 lockmgr_printinfo(&vp->v_lock); 1986 1987 /* userspace portion */ 1988 if (EXISTSOP(pmp, PRINT)) { 1989 PUFFS_MSG_ALLOC(vn, print); 1990 puffs_msg_setinfo(park_print, PUFFSOP_VN, 1991 PUFFS_VN_PRINT, VPTOPNC(vp)); 1992 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 1993 NULL, error); 1994 PUFFS_MSG_RELEASE(print); 1995 } 1996 1997 return 0; 1998 } 1999 2000 int 2001 puffs_pathconf(void *v) 2002 { 2003 struct vop_pathconf_args /* { 2004 const struct vnodeop_desc *a_desc; 2005 struct vnode *a_vp; 2006 int a_name; 2007 register_t *a_retval; 2008 } */ *ap = v; 2009 PUFFS_MSG_VARS(vn, pathconf); 2010 struct vnode *vp = ap->a_vp; 2011 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2012 int error; 2013 2014 PUFFS_MSG_ALLOC(vn, pathconf); 2015 pathconf_msg->pvnr_name = ap->a_name; 2016 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2017 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2018 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2019 error = checkerr(pmp, error, __func__); 2020 if (!error) 2021 *ap->a_retval = pathconf_msg->pvnr_retval; 2022 PUFFS_MSG_RELEASE(pathconf); 2023 2024 return error; 2025 } 2026 2027 int 2028 puffs_advlock(void *v) 2029 { 2030 struct vop_advlock_args /* { 2031 const struct vnodeop_desc *a_desc; 2032 struct vnode *a_vp; 2033 void *a_id; 2034 int a_op; 2035 struct flock *a_fl; 2036 int a_flags; 2037 } */ *ap = v; 2038 PUFFS_MSG_VARS(vn, advlock); 2039 struct vnode *vp = ap->a_vp; 2040 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2041 int error; 2042 2043 PUFFS_MSG_ALLOC(vn, advlock); 2044 error = copyin(ap->a_fl, &advlock_msg->pvnr_fl, sizeof(struct flock)); 2045 if (error) 2046 goto out; 2047 advlock_msg->pvnr_id = ap->a_id; 2048 advlock_msg->pvnr_op = ap->a_op; 2049 advlock_msg->pvnr_flags = ap->a_flags; 2050 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2051 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2052 2053 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2054 error = checkerr(pmp, error, __func__); 2055 2056 out: 2057 PUFFS_MSG_RELEASE(advlock); 2058 return error; 2059 } 2060 2061 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2062 #define BIOREAD(bp) (bp->b_flags & B_READ) 2063 #define BIOWRITE(bp) ((bp->b_flags & B_READ) == 0) 2064 2065 /* 2066 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2067 */ 2068 int 2069 puffs_strategy(void *v) 2070 { 2071 struct vop_strategy_args /* { 2072 const struct vnodeop_desc *a_desc; 2073 struct vnode *a_vp; 2074 struct buf *a_bp; 2075 } */ *ap = v; 2076 PUFFS_MSG_VARS(vn, rw); 2077 struct vnode *vp = ap->a_vp; 2078 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2079 struct puffs_node *pn; 2080 struct buf *bp; 2081 size_t argsize; 2082 size_t tomove, moved; 2083 int error, dofaf, dobiodone; 2084 2085 pmp = MPTOPUFFSMP(vp->v_mount); 2086 bp = ap->a_bp; 2087 error = 0; 2088 dofaf = 0; 2089 pn = VPTOPP(vp); 2090 park_rw = NULL; /* explicit */ 2091 dobiodone = 1; 2092 2093 if ((BIOREAD(bp) && !EXISTSOP(pmp, READ)) 2094 || (BIOWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2095 ERROUT(EOPNOTSUPP); 2096 2097 /* 2098 * Short-circuit optimization: don't flush buffer in between 2099 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2100 */ 2101 if (pn->pn_stat & PNODE_DYING) { 2102 KASSERT(BIOWRITE(bp)); 2103 bp->b_resid = 0; 2104 goto out; 2105 } 2106 2107 #ifdef DIAGNOSTIC 2108 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2109 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2110 bp->b_bcount); 2111 #endif 2112 2113 /* 2114 * See explanation for the necessity of a FAF in puffs_fsync. 2115 * 2116 * Also, do FAF in case we're suspending. 2117 * See puffs_vfsops.c:pageflush() 2118 */ 2119 if (BIOWRITE(bp)) { 2120 simple_lock(&vp->v_interlock); 2121 if (vp->v_iflag & VI_XLOCK) 2122 dofaf = 1; 2123 if (pn->pn_stat & PNODE_SUSPEND) 2124 dofaf = 1; 2125 simple_unlock(&vp->v_interlock); 2126 } 2127 2128 #ifdef DIAGNOSTIC 2129 if (curlwp == uvm.pagedaemon_lwp) 2130 KASSERT(dofaf || BIOASYNC(bp)); 2131 #endif 2132 2133 /* allocate transport structure */ 2134 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2135 argsize = sizeof(struct puffs_vnmsg_rw); 2136 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2137 (void **)&rw_msg, dofaf ? 0 : 1); 2138 if (error) 2139 goto out; 2140 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2141 2142 /* 2x2 cases: read/write, faf/nofaf */ 2143 if (BIOREAD(bp)) { 2144 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2145 PUFFS_VN_READ, VPTOPNC(vp)); 2146 puffs_msg_setdelta(park_rw, tomove); 2147 if (BIOASYNC(bp)) { 2148 puffs_msg_setcall(park_rw, 2149 puffs_parkdone_asyncbioread, bp); 2150 puffs_msg_enqueue(pmp, park_rw); 2151 dobiodone = 0; 2152 } else { 2153 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2154 NULL, error); 2155 error = checkerr(pmp, error, __func__); 2156 if (error) 2157 goto out; 2158 2159 if (rw_msg->pvnr_resid > tomove) { 2160 puffs_senderr(pmp, PUFFS_ERR_READ, 2161 E2BIG, "resid grew", VPTOPNC(vp)); 2162 ERROUT(EPROTO); 2163 } 2164 2165 moved = tomove - rw_msg->pvnr_resid; 2166 2167 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2168 bp->b_resid = bp->b_bcount - moved; 2169 } 2170 } else { 2171 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2172 PUFFS_VN_WRITE, VPTOPNC(vp)); 2173 /* 2174 * make pages read-only before we write them if we want 2175 * write caching info 2176 */ 2177 if (PUFFS_WCACHEINFO(pmp)) { 2178 struct uvm_object *uobj = &vp->v_uobj; 2179 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2180 struct vm_page *vmp; 2181 int i; 2182 2183 for (i = 0; i < npages; i++) { 2184 vmp= uvm_pageratop((vaddr_t)bp->b_data 2185 + (i << PAGE_SHIFT)); 2186 DPRINTF(("puffs_strategy: write-protecting " 2187 "vp %p page %p, offset %" PRId64"\n", 2188 vp, vmp, vmp->offset)); 2189 simple_lock(&uobj->vmobjlock); 2190 vmp->flags |= PG_RDONLY; 2191 pmap_page_protect(vmp, VM_PROT_READ); 2192 simple_unlock(&uobj->vmobjlock); 2193 } 2194 } 2195 2196 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2197 if (dofaf) { 2198 puffs_msg_setfaf(park_rw); 2199 } else if (BIOASYNC(bp)) { 2200 puffs_msg_setcall(park_rw, 2201 puffs_parkdone_asyncbiowrite, bp); 2202 dobiodone = 0; 2203 } 2204 2205 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2206 2207 if (dobiodone == 0) 2208 goto out; 2209 2210 /* 2211 * XXXXXXXX: wrong, but kernel can't survive strategy 2212 * failure currently. Here, have one more X: X. 2213 */ 2214 if (error != ENOMEM) 2215 error = 0; 2216 2217 error = checkerr(pmp, error, __func__); 2218 if (error) 2219 goto out; 2220 2221 if (rw_msg->pvnr_resid > tomove) { 2222 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2223 E2BIG, "resid grew", VPTOPNC(vp)); 2224 ERROUT(EPROTO); 2225 } 2226 2227 /* 2228 * FAF moved everything. Frankly, we don't 2229 * really have a choice. 2230 */ 2231 if (dofaf && error == 0) 2232 moved = tomove; 2233 else 2234 moved = tomove - rw_msg->pvnr_resid; 2235 2236 bp->b_resid = bp->b_bcount - moved; 2237 if (bp->b_resid != 0) { 2238 ERROUT(EIO); 2239 } 2240 } 2241 2242 out: 2243 if (park_rw) 2244 puffs_msgmem_release(park_rw); 2245 2246 if (error) 2247 bp->b_error = error; 2248 2249 if (error || dobiodone) 2250 biodone(bp); 2251 2252 return error; 2253 } 2254 2255 int 2256 puffs_mmap(void *v) 2257 { 2258 struct vop_mmap_args /* { 2259 const struct vnodeop_desc *a_desc; 2260 struct vnode *a_vp; 2261 vm_prot_t a_prot; 2262 kauth_cred_t a_cred; 2263 struct lwp *a_l; 2264 } */ *ap = v; 2265 PUFFS_MSG_VARS(vn, mmap); 2266 struct vnode *vp = ap->a_vp; 2267 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2268 int error; 2269 2270 if (!PUFFS_USE_PAGECACHE(pmp)) 2271 return genfs_eopnotsupp(v); 2272 2273 if (EXISTSOP(pmp, MMAP)) { 2274 PUFFS_MSG_ALLOC(vn, mmap); 2275 mmap_msg->pvnr_prot = ap->a_prot; 2276 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2277 puffs_cidcvt(&mmap_msg->pvnr_cid, ap->a_l); 2278 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2279 PUFFS_VN_MMAP, VPTOPNC(vp)); 2280 2281 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2282 error = checkerr(pmp, error, __func__); 2283 PUFFS_MSG_RELEASE(mmap); 2284 } else { 2285 error = genfs_mmap(v); 2286 } 2287 2288 return error; 2289 } 2290 2291 2292 /* 2293 * The rest don't get a free trip to userspace and back, they 2294 * have to stay within the kernel. 2295 */ 2296 2297 /* 2298 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2299 * well, maybe somehow, somewhere, some day .... 2300 */ 2301 int 2302 puffs_bmap(void *v) 2303 { 2304 struct vop_bmap_args /* { 2305 const struct vnodeop_desc *a_desc; 2306 struct vnode *a_vp; 2307 daddr_t a_bn; 2308 struct vnode **a_vpp; 2309 daddr_t *a_bnp; 2310 int *a_runp; 2311 } */ *ap = v; 2312 struct puffs_mount *pmp; 2313 2314 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2315 2316 if (ap->a_vpp) 2317 *ap->a_vpp = ap->a_vp; 2318 if (ap->a_bnp) 2319 *ap->a_bnp = ap->a_bn; 2320 if (ap->a_runp) 2321 *ap->a_runp 2322 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2323 2324 return 0; 2325 } 2326 2327 /* 2328 * Handle getpages faults in puffs. We let genfs_getpages() do most 2329 * of the dirty work, but we come in this route to do accounting tasks. 2330 * If the user server has specified functions for cache notifications 2331 * about reads and/or writes, we record which type of operation we got, 2332 * for which page range, and proceed to issue a FAF notification to the 2333 * server about it. 2334 */ 2335 int 2336 puffs_getpages(void *v) 2337 { 2338 struct vop_getpages_args /* { 2339 const struct vnodeop_desc *a_desc; 2340 struct vnode *a_vp; 2341 voff_t a_offset; 2342 struct vm_page **a_m; 2343 int *a_count; 2344 int a_centeridx; 2345 vm_prot_t a_access_type; 2346 int a_advice; 2347 int a_flags; 2348 } */ *ap = v; 2349 struct puffs_mount *pmp; 2350 struct puffs_node *pn; 2351 struct vnode *vp; 2352 struct vm_page **pgs; 2353 struct puffs_cacheinfo *pcinfo = NULL; 2354 struct puffs_cacherun *pcrun; 2355 void *parkmem = NULL; 2356 size_t runsizes; 2357 int i, npages, si, streakon; 2358 int error, locked, write; 2359 2360 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2361 npages = *ap->a_count; 2362 pgs = ap->a_m; 2363 vp = ap->a_vp; 2364 pn = vp->v_data; 2365 locked = (ap->a_flags & PGO_LOCKED) != 0; 2366 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2367 2368 /* ccg xnaht - gets Wuninitialized wrong */ 2369 pcrun = NULL; 2370 runsizes = 0; 2371 2372 /* 2373 * Check that we aren't trying to fault in pages which our file 2374 * server doesn't know about. This happens if we extend a file by 2375 * skipping some pages and later try to fault in pages which 2376 * are between pn_serversize and vp_size. This check optimizes 2377 * away the common case where a file is being extended. 2378 */ 2379 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2380 struct vattr va; 2381 2382 /* try again later when we can block */ 2383 if (locked) 2384 ERROUT(EBUSY); 2385 2386 simple_unlock(&vp->v_interlock); 2387 vattr_null(&va); 2388 va.va_size = vp->v_size; 2389 error = puffs_dosetattr(vp, &va, FSCRED, NULL, 0); 2390 if (error) 2391 ERROUT(error); 2392 simple_lock(&vp->v_interlock); 2393 } 2394 2395 if (write && PUFFS_WCACHEINFO(pmp)) { 2396 #ifdef notnowjohn 2397 /* allocate worst-case memory */ 2398 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2399 pcinfo = malloc(sizeof(struct puffs_cacheinfo) + runsizes, 2400 M_PUFFS, M_ZERO | locked ? M_NOWAIT : M_WAITOK); 2401 2402 /* 2403 * can't block if we're locked and can't mess up caching 2404 * information for fs server. so come back later, please 2405 */ 2406 if (pcinfo == NULL) 2407 ERROUT(ENOMEM); 2408 2409 parkmem = puffs_park_alloc(locked == 0); 2410 if (parkmem == NULL) 2411 ERROUT(ENOMEM); 2412 2413 pcrun = pcinfo->pcache_runs; 2414 #else 2415 (void)parkmem; 2416 #endif 2417 } 2418 2419 error = genfs_getpages(v); 2420 if (error) 2421 goto out; 2422 2423 if (PUFFS_WCACHEINFO(pmp) == 0) 2424 goto out; 2425 2426 /* 2427 * Let's see whose fault it was and inform the user server of 2428 * possibly read/written pages. Map pages from read faults 2429 * strictly read-only, since otherwise we might miss info on 2430 * when the page is actually write-faulted to. 2431 */ 2432 if (!locked) 2433 simple_lock(&vp->v_uobj.vmobjlock); 2434 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2435 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2436 if (streakon && write) { 2437 streakon = 0; 2438 pcrun[si].pcache_runend 2439 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2440 si++; 2441 } 2442 continue; 2443 } 2444 if (streakon == 0 && write) { 2445 streakon = 1; 2446 pcrun[si].pcache_runstart = pgs[i]->offset; 2447 } 2448 2449 if (!write) 2450 pgs[i]->flags |= PG_RDONLY; 2451 } 2452 /* was the last page part of our streak? */ 2453 if (streakon) { 2454 pcrun[si].pcache_runend 2455 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2456 si++; 2457 } 2458 if (!locked) 2459 simple_unlock(&vp->v_uobj.vmobjlock); 2460 2461 KASSERT(si <= (npages / 2) + 1); 2462 2463 #ifdef notnowjohn 2464 /* send results to userspace */ 2465 if (write) 2466 puffs_cacheop(pmp, parkmem, pcinfo, 2467 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2468 #endif 2469 2470 out: 2471 if (error) { 2472 if (pcinfo != NULL) 2473 free(pcinfo, M_PUFFS); 2474 #ifdef notnowjohn 2475 if (parkmem != NULL) 2476 puffs_park_release(parkmem, 1); 2477 #endif 2478 } 2479 2480 return error; 2481 } 2482 2483 int 2484 puffs_lock(void *v) 2485 { 2486 struct vop_lock_args /* { 2487 struct vnode *a_vp; 2488 int a_flags; 2489 }*/ *ap = v; 2490 struct vnode *vp = ap->a_vp; 2491 struct mount *mp = vp->v_mount; 2492 2493 #if 0 2494 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2495 #endif 2496 2497 /* 2498 * XXX: this avoids deadlocking when we're suspending. 2499 * e.g. some ops holding the vnode lock might be blocked for 2500 * the vfs transaction lock so we'd deadlock. 2501 * 2502 * Now once again this is skating on the thin ice of modern life, 2503 * since we are breaking the consistency guarantee provided 2504 * _to the user server_ by vnode locking. Hopefully this will 2505 * get fixed soon enough by getting rid of the dependency on 2506 * vnode locks alltogether. 2507 */ 2508 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2509 if (ap->a_flags & LK_INTERLOCK) 2510 simple_unlock(&vp->v_interlock); 2511 return 0; 2512 } 2513 2514 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2515 } 2516 2517 int 2518 puffs_unlock(void *v) 2519 { 2520 struct vop_unlock_args /* { 2521 struct vnode *a_vp; 2522 int a_flags; 2523 } */ *ap = v; 2524 struct vnode *vp = ap->a_vp; 2525 struct mount *mp = vp->v_mount; 2526 2527 #if 0 2528 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2529 #endif 2530 2531 /* XXX: see puffs_lock() */ 2532 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2533 if (ap->a_flags & LK_INTERLOCK) 2534 simple_unlock(&vp->v_interlock); 2535 return 0; 2536 } 2537 2538 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2539 } 2540 2541 int 2542 puffs_islocked(void *v) 2543 { 2544 struct vop_islocked_args *ap = v; 2545 int rv; 2546 2547 rv = lockstatus(&ap->a_vp->v_lock); 2548 return rv; 2549 } 2550 2551 int 2552 puffs_generic(void *v) 2553 { 2554 struct vop_generic_args *ap = v; 2555 2556 (void)ap; 2557 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2558 2559 return EOPNOTSUPP; 2560 } 2561 2562 2563 /* 2564 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2565 * FAF update information for the puffs node first. 2566 */ 2567 int 2568 puffs_spec_read(void *v) 2569 { 2570 struct vop_read_args /* { 2571 const struct vnodeop_desc *a_desc; 2572 struct vnode *a_vp; 2573 struct uio *a_uio; 2574 int a_ioflag; 2575 kauth_cred_t a_cred; 2576 } */ *ap = v; 2577 2578 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2579 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2580 } 2581 2582 int 2583 puffs_spec_write(void *v) 2584 { 2585 struct vop_write_args /* { 2586 const struct vnodeop_desc *a_desc; 2587 struct vnode *a_vp; 2588 struct uio *a_uio; 2589 int a_ioflag; 2590 kauth_cred_t a_cred; 2591 }*/ *ap = v; 2592 2593 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2594 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2595 } 2596 2597 int 2598 puffs_fifo_read(void *v) 2599 { 2600 struct vop_read_args /* { 2601 const struct vnodeop_desc *a_desc; 2602 struct vnode *a_vp; 2603 struct uio *a_uio; 2604 int a_ioflag; 2605 kauth_cred_t a_cred; 2606 } */ *ap = v; 2607 2608 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2609 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2610 } 2611 2612 int 2613 puffs_fifo_write(void *v) 2614 { 2615 struct vop_write_args /* { 2616 const struct vnodeop_desc *a_desc; 2617 struct vnode *a_vp; 2618 struct uio *a_uio; 2619 int a_ioflag; 2620 kauth_cred_t a_cred; 2621 }*/ *ap = v; 2622 2623 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2624 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2625 } 2626
Indexes created Wed Oct 01 15:09:59 GMT 2025