puffs_vnops.c revision 1.107
1 /* $NetBSD: puffs_vnops.c,v 1.107 2007/10/11 19:41:14 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 1.107 2007/10/11 19:41:14 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 error = puffs_msg_vn(pmp, park_lookup, 0, PUFFS_VN_LOOKUP, dvp, NULL); 498 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 499 500 /* 501 * In case of error, there is no new vnode to play with, so be 502 * happy with the NULL value given to vpp in the beginning. 503 * Also, check if this really was an error or the target was not 504 * present. Either treat it as a non-error for CREATE/RENAME or 505 * enter the component into the negative name cache (if desired). 506 */ 507 if (error) { 508 error = checkerr(pmp, error, __func__); 509 if (error == ENOENT) { 510 /* don't allow to create files on r/o fs */ 511 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 512 && cnp->cn_nameiop == CREATE) { 513 error = EROFS; 514 515 /* adjust values if we are creating */ 516 } else if ((cnp->cn_flags & ISLASTCN) 517 && (cnp->cn_nameiop == CREATE 518 || cnp->cn_nameiop == RENAME)) { 519 cnp->cn_flags |= SAVENAME; 520 error = EJUSTRETURN; 521 522 /* save negative cache entry */ 523 } else { 524 if ((cnp->cn_flags & MAKEENTRY) 525 && PUFFS_USE_NAMECACHE(pmp)) 526 cache_enter(dvp, NULL, cnp); 527 } 528 } 529 goto out; 530 } 531 532 /* 533 * Check that we don't get our parent node back, that would cause 534 * a pretty obvious deadlock. 535 */ 536 dpn = dvp->v_data; 537 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 538 puffs_msg_errnotify(pmp, PUFFS_ERR_LOOKUP, EINVAL, 539 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 540 error = EPROTO; 541 goto out; 542 } 543 544 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 1, 1, &vp); 545 if (error == PUFFS_NOSUCHCOOKIE) { 546 error = puffs_getvnode(dvp->v_mount, 547 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 548 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 549 if (error) { 550 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 551 lookup_msg->pvnr_newnode, ap->a_cnp); 552 goto out; 553 } 554 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 555 } else if (error) { 556 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 557 lookup_msg->pvnr_newnode, ap->a_cnp); 558 goto out; 559 } 560 561 *ap->a_vpp = vp; 562 563 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_USE_NAMECACHE(pmp)) 564 cache_enter(dvp, vp, cnp); 565 566 /* XXX */ 567 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 568 cnp->cn_flags &= ~REQUIREDIR; 569 if (lookup_msg->pvnr_cn.pkcn_consume) 570 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 571 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 572 573 out: 574 if (cnp->cn_flags & ISDOTDOT) 575 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 576 577 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 578 PUFFS_MSG_RELEASE(lookup); 579 return error; 580 } 581 582 int 583 puffs_create(void *v) 584 { 585 struct vop_create_args /* { 586 const struct vnodeop_desc *a_desc; 587 struct vnode *a_dvp; 588 struct vnode **a_vpp; 589 struct componentname *a_cnp; 590 struct vattr *a_vap; 591 } */ *ap = v; 592 PUFFS_MSG_VARS(vn, create); 593 struct vnode *dvp = ap->a_dvp; 594 struct componentname *cnp = ap->a_cnp; 595 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 596 int error; 597 598 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 599 dvp, ap->a_cnp->cn_nameptr)); 600 601 PUFFS_MSG_ALLOC(vn, create); 602 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 603 &create_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 604 create_msg->pvnr_va = *ap->a_vap; 605 606 error = puffs_msg_vn(pmp, park_create, PUFFS_VN_CREATE, 0, dvp, NULL); 607 error = checkerr(pmp, error, __func__); 608 if (error) 609 goto out; 610 611 error = puffs_newnode(dvp->v_mount, dvp, ap->a_vpp, 612 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 613 if (error) 614 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, VPTOPNC(dvp), 615 create_msg->pvnr_newnode, cnp); 616 617 out: 618 if (error || (cnp->cn_flags & SAVESTART) == 0) 619 PNBUF_PUT(cnp->cn_pnbuf); 620 vput(dvp); 621 622 DPRINTF(("puffs_create: return %d\n", error)); 623 PUFFS_MSG_RELEASE(create); 624 return error; 625 } 626 627 int 628 puffs_mknod(void *v) 629 { 630 struct vop_mknod_args /* { 631 const struct vnodeop_desc *a_desc; 632 struct vnode *a_dvp; 633 struct vnode **a_vpp; 634 struct componentname *a_cnp; 635 struct vattr *a_vap; 636 } */ *ap = v; 637 PUFFS_MSG_VARS(vn, mknod); 638 struct vnode *dvp = ap->a_dvp; 639 struct componentname *cnp = ap->a_cnp; 640 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 641 int error; 642 643 PUFFS_MSG_ALLOC(vn, mknod); 644 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 645 &mknod_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 646 mknod_msg->pvnr_va = *ap->a_vap; 647 648 error = puffs_msg_vn(pmp, park_mknod, PUFFS_VN_MKNOD, 0, dvp, NULL); 649 error = checkerr(pmp, error, __func__); 650 if (error) 651 goto out; 652 653 error = puffs_newnode(dvp->v_mount, dvp, ap->a_vpp, 654 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 655 ap->a_vap->va_rdev); 656 if (error) 657 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, VPTOPNC(dvp), 658 mknod_msg->pvnr_newnode, cnp); 659 660 out: 661 PUFFS_MSG_RELEASE(mknod); 662 if (error || (cnp->cn_flags & SAVESTART) == 0) 663 PNBUF_PUT(cnp->cn_pnbuf); 664 vput(dvp); 665 return error; 666 } 667 668 int 669 puffs_open(void *v) 670 { 671 struct vop_open_args /* { 672 const struct vnodeop_desc *a_desc; 673 struct vnode *a_vp; 674 int a_mode; 675 kauth_cred_t a_cred; 676 struct lwp *a_l; 677 } */ *ap = v; 678 PUFFS_MSG_VARS(vn, open); 679 struct vnode *vp = ap->a_vp; 680 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 681 int mode = ap->a_mode; 682 int error; 683 684 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 685 686 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 687 ERROUT(EROFS); 688 689 if (!EXISTSOP(pmp, OPEN)) 690 ERROUT(0); 691 692 PUFFS_MSG_ALLOC(vn, open); 693 open_msg->pvnr_mode = mode; 694 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 695 puffs_cidcvt(&open_msg->pvnr_cid, ap->a_l); 696 697 error = puffs_msg_vn(pmp, park_open, PUFFS_VN_OPEN, 0, vp, NULL); 698 error = checkerr(pmp, error, __func__); 699 700 out: 701 DPRINTF(("puffs_open: returning %d\n", error)); 702 PUFFS_MSG_RELEASE(open); 703 return error; 704 } 705 706 int 707 puffs_close(void *v) 708 { 709 struct vop_close_args /* { 710 const struct vnodeop_desc *a_desc; 711 struct vnode *a_vp; 712 int a_fflag; 713 kauth_cred_t a_cred; 714 struct lwp *a_l; 715 } */ *ap = v; 716 PUFFS_MSG_VARS(vn, close); 717 struct vnode *vp = ap->a_vp; 718 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 719 720 PUFFS_MSG_ALLOC(vn, close); 721 puffs_msg_setfaf(park_close); 722 close_msg->pvnr_fflag = ap->a_fflag; 723 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 724 puffs_cidcvt(&close_msg->pvnr_cid, ap->a_l); 725 726 puffs_msg_vn(pmp, park_close, PUFFS_VN_CLOSE, 0, vp, NULL); 727 728 PUFFS_MSG_RELEASE(close); 729 return 0; 730 } 731 732 int 733 puffs_access(void *v) 734 { 735 struct vop_access_args /* { 736 const struct vnodeop_desc *a_desc; 737 struct vnode *a_vp; 738 int a_mode; 739 kauth_cred_t a_cred; 740 struct lwp *a_l; 741 } */ *ap = v; 742 PUFFS_MSG_VARS(vn, access); 743 struct vnode *vp = ap->a_vp; 744 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 745 int mode = ap->a_mode; 746 int error; 747 748 if (mode & VWRITE) { 749 switch (vp->v_type) { 750 case VDIR: 751 case VLNK: 752 case VREG: 753 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 754 || !EXISTSOP(pmp, WRITE)) 755 return EROFS; 756 break; 757 default: 758 break; 759 } 760 } 761 762 if (!EXISTSOP(pmp, ACCESS)) 763 return 0; 764 765 PUFFS_MSG_ALLOC(vn, access); 766 access_msg->pvnr_mode = ap->a_mode; 767 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 768 puffs_cidcvt(&access_msg->pvnr_cid, ap->a_l); 769 770 error = puffs_msg_vn(pmp, park_access, PUFFS_VN_ACCESS, 0, vp, NULL); 771 error = checkerr(pmp, error, __func__); 772 PUFFS_MSG_RELEASE(access); 773 774 return error; 775 } 776 777 int 778 puffs_getattr(void *v) 779 { 780 struct vop_getattr_args /* { 781 const struct vnodeop_desc *a_desc; 782 struct vnode *a_vp; 783 struct vattr *a_vap; 784 kauth_cred_t a_cred; 785 struct lwp *a_l; 786 } */ *ap = v; 787 PUFFS_MSG_VARS(vn, getattr); 788 struct vnode *vp = ap->a_vp; 789 struct mount *mp = vp->v_mount; 790 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 791 struct vattr *vap, *rvap; 792 struct puffs_node *pn; 793 int error = 0; 794 795 vap = ap->a_vap; 796 797 PUFFS_MSG_ALLOC(vn, getattr); 798 vattr_null(&getattr_msg->pvnr_va); 799 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 800 puffs_cidcvt(&getattr_msg->pvnr_cid, ap->a_l); 801 802 error = puffs_msg_vn(pmp, park_getattr, PUFFS_VN_GETATTR, 0, vp, NULL); 803 error = checkerr(pmp, error, __func__); 804 if (error) 805 goto out; 806 807 rvap = &getattr_msg->pvnr_va; 808 /* 809 * Don't listen to the file server regarding special device 810 * size info, the file server doesn't know anything about them. 811 */ 812 if (vp->v_type == VBLK || vp->v_type == VCHR) 813 rvap->va_size = vp->v_size; 814 815 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 816 if (vp->v_type == VBLK) 817 rvap->va_blocksize = BLKDEV_IOSIZE; 818 else if (vp->v_type == VCHR) 819 rvap->va_blocksize = MAXBSIZE; 820 821 (void) memcpy(vap, rvap, sizeof(struct vattr)); 822 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 823 824 pn = VPTOPP(vp); 825 if (pn->pn_stat & PNODE_METACACHE_ATIME) 826 vap->va_atime = pn->pn_mc_atime; 827 if (pn->pn_stat & PNODE_METACACHE_CTIME) 828 vap->va_ctime = pn->pn_mc_ctime; 829 if (pn->pn_stat & PNODE_METACACHE_MTIME) 830 vap->va_mtime = pn->pn_mc_mtime; 831 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 832 vap->va_size = pn->pn_mc_size; 833 } else { 834 if (rvap->va_size != VNOVAL 835 && vp->v_type != VBLK && vp->v_type != VCHR) { 836 uvm_vnp_setsize(vp, rvap->va_size); 837 pn->pn_serversize = rvap->va_size; 838 } 839 } 840 841 out: 842 PUFFS_MSG_RELEASE(getattr); 843 return error; 844 } 845 846 static int 847 puffs_dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, 848 struct lwp *l, int chsize) 849 { 850 PUFFS_MSG_VARS(vn, setattr); 851 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 852 struct puffs_node *pn = vp->v_data; 853 int error; 854 855 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 856 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 857 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 858 || vap->va_mode != (mode_t)VNOVAL)) 859 return EROFS; 860 861 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 862 && vp->v_type == VREG && vap->va_size != VNOVAL) 863 return EROFS; 864 865 /* 866 * Flush metacache first. If we are called with some explicit 867 * parameters, treat them as information overriding metacache 868 * information. 869 */ 870 if (pn->pn_stat & PNODE_METACACHE_MASK) { 871 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 872 && vap->va_atime.tv_sec == VNOVAL) 873 vap->va_atime = pn->pn_mc_atime; 874 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 875 && vap->va_ctime.tv_sec == VNOVAL) 876 vap->va_ctime = pn->pn_mc_ctime; 877 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 878 && vap->va_mtime.tv_sec == VNOVAL) 879 vap->va_mtime = pn->pn_mc_mtime; 880 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 881 && vap->va_size == VNOVAL) 882 vap->va_size = pn->pn_mc_size; 883 884 pn->pn_stat &= ~PNODE_METACACHE_MASK; 885 } 886 887 PUFFS_MSG_ALLOC(vn, setattr); 888 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 889 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 890 puffs_cidcvt(&setattr_msg->pvnr_cid, l); 891 892 error = puffs_msg_vn(pmp, park_setattr, PUFFS_VN_SETATTR, 0, vp, NULL); 893 PUFFS_MSG_RELEASE(setattr); 894 895 error = checkerr(pmp, error, __func__); 896 if (error) 897 return error; 898 899 if (vap->va_size != VNOVAL) { 900 pn->pn_serversize = vap->va_size; 901 if (chsize) 902 uvm_vnp_setsize(vp, vap->va_size); 903 } 904 905 return 0; 906 } 907 908 int 909 puffs_setattr(void *v) 910 { 911 struct vop_getattr_args /* { 912 const struct vnodeop_desc *a_desc; 913 struct vnode *a_vp; 914 struct vattr *a_vap; 915 kauth_cred_t a_cred; 916 struct lwp *a_l; 917 } */ *ap = v; 918 919 return puffs_dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, ap->a_l, 1); 920 } 921 922 static __inline int 923 doinact(struct puffs_mount *pmp, int iaflag) 924 { 925 926 if (EXISTSOP(pmp, INACTIVE)) 927 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 928 if (iaflag || ALLOPS(pmp)) 929 return 1; 930 else 931 return 0; 932 else 933 return 1; 934 else 935 return 0; 936 } 937 938 static void 939 puffs_callinactive(struct puffs_mount *pmp, void *cookie, int iaflag, 940 struct lwp *l) 941 { 942 PUFFS_MSG_VARS(vn, inactive); 943 944 if (doinact(pmp, iaflag)) { 945 struct puffs_req *preq; 946 947 PUFFS_MSG_ALLOC(vn, inactive); 948 puffs_cidcvt(&inactive_msg->pvnr_cid, l); 949 preq = (struct puffs_req *)inactive_msg; 950 preq->preq_cookie = cookie; 951 preq->preq_opclass = PUFFSOP_VN; 952 preq->preq_optype = PUFFS_VN_INACTIVE; 953 954 puffs_msg_raw(pmp, park_inactive); 955 PUFFS_MSG_RELEASE(inactive); 956 } 957 } 958 959 /* XXX: callinactive can't setback */ 960 int 961 puffs_inactive(void *v) 962 { 963 struct vop_inactive_args /* { 964 const struct vnodeop_desc *a_desc; 965 struct vnode *a_vp; 966 struct lwp *a_l; 967 } */ *ap = v; 968 PUFFS_MSG_VARS(vn, inactive); 969 struct vnode *vp = ap->a_vp; 970 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 971 struct puffs_node *pnode; 972 973 pnode = vp->v_data; 974 975 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 976 PUFFS_MSG_ALLOC(vn, inactive); 977 puffs_cidcvt(&inactive_msg->pvnr_cid, ap->a_l); 978 puffs_msg_vn(pmp, park_inactive, PUFFS_VN_INACTIVE, 0, vp,NULL); 979 PUFFS_MSG_RELEASE(inactive); 980 } 981 pnode->pn_stat &= ~PNODE_DOINACT; 982 983 VOP_UNLOCK(vp, 0); 984 985 /* 986 * file server thinks it's gone? then don't be afraid care, 987 * node's life was already all it would ever be 988 */ 989 if (pnode->pn_stat & PNODE_NOREFS) { 990 pnode->pn_stat |= PNODE_DYING; 991 vrecycle(vp, NULL, ap->a_l); 992 } 993 994 return 0; 995 } 996 997 static void 998 puffs_callreclaim(struct puffs_mount *pmp, void *cookie, struct lwp *l) 999 { 1000 PUFFS_MSG_VARS(vn, reclaim); 1001 struct puffs_req *preq; 1002 1003 if (!EXISTSOP(pmp, RECLAIM)) 1004 return; 1005 1006 PUFFS_MSG_ALLOC(vn, reclaim); 1007 puffs_msg_setfaf(park_reclaim); 1008 puffs_cidcvt(&reclaim_msg->pvnr_cid, l); 1009 1010 preq = (struct puffs_req *)reclaim_msg; 1011 preq->preq_cookie = cookie; 1012 preq->preq_opclass = PUFFSOP_VN; 1013 preq->preq_optype = PUFFS_VN_RECLAIM; 1014 1015 puffs_msg_raw(pmp, park_reclaim); 1016 PUFFS_MSG_RELEASE(reclaim); 1017 } 1018 1019 /* 1020 * always FAF, we don't really care if the server wants to fail to 1021 * reclaim the node or not 1022 */ 1023 int 1024 puffs_reclaim(void *v) 1025 { 1026 struct vop_reclaim_args /* { 1027 const struct vnodeop_desc *a_desc; 1028 struct vnode *a_vp; 1029 struct lwp *a_l; 1030 } */ *ap = v; 1031 struct vnode *vp = ap->a_vp; 1032 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1033 1034 /* 1035 * first things first: check if someone is trying to reclaim the 1036 * root vnode. do not allow that to travel to userspace. 1037 * Note that we don't need to take the lock similarly to 1038 * puffs_root(), since there is only one of us. 1039 */ 1040 if (vp->v_vflag & VV_ROOT) { 1041 mutex_enter(&pmp->pmp_lock); 1042 KASSERT(pmp->pmp_root != NULL); 1043 pmp->pmp_root = NULL; 1044 mutex_exit(&pmp->pmp_lock); 1045 goto out; 1046 } 1047 1048 puffs_callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), ap->a_l); 1049 1050 out: 1051 if (PUFFS_USE_NAMECACHE(pmp)) 1052 cache_purge(vp); 1053 puffs_putvnode(vp); 1054 1055 return 0; 1056 } 1057 1058 #define CSIZE sizeof(**ap->a_cookies) 1059 int 1060 puffs_readdir(void *v) 1061 { 1062 struct vop_readdir_args /* { 1063 const struct vnodeop_desc *a_desc; 1064 struct vnode *a_vp; 1065 struct uio *a_uio; 1066 kauth_cred_t a_cred; 1067 int *a_eofflag; 1068 off_t **a_cookies; 1069 int *a_ncookies; 1070 } */ *ap = v; 1071 PUFFS_MSG_VARS(vn, readdir); 1072 struct vnode *vp = ap->a_vp; 1073 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1074 size_t argsize, tomove, cookiemem, cookiesmax; 1075 struct uio *uio = ap->a_uio; 1076 size_t howmuch, resid; 1077 int error; 1078 1079 /* 1080 * ok, so we need: resid + cookiemem = maxreq 1081 * => resid + cookiesize * (resid/minsize) = maxreq 1082 * => resid + cookiesize/minsize * resid = maxreq 1083 * => (cookiesize/minsize + 1) * resid = maxreq 1084 * => resid = maxreq / (cookiesize/minsize + 1) 1085 * 1086 * Since cookiesize <= minsize and we're not very big on floats, 1087 * we approximate that to be 1. Therefore: 1088 * 1089 * resid = maxreq / 2; 1090 * 1091 * Well, at least we didn't have to use differential equations 1092 * or the Gram-Schmidt process. 1093 * 1094 * (yes, I'm very afraid of this) 1095 */ 1096 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1097 1098 if (ap->a_cookies) { 1099 KASSERT(ap->a_ncookies != NULL); 1100 if (pmp->pmp_args.pa_fhsize == 0) 1101 return EOPNOTSUPP; 1102 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1103 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1104 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1105 } else { 1106 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1107 cookiesmax = 0; 1108 cookiemem = 0; 1109 } 1110 1111 argsize = sizeof(struct puffs_vnmsg_readdir); 1112 tomove = resid + cookiemem; 1113 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1114 (void **)&readdir_msg, 1); 1115 1116 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1117 readdir_msg->pvnr_offset = uio->uio_offset; 1118 readdir_msg->pvnr_resid = resid; 1119 readdir_msg->pvnr_ncookies = cookiesmax; 1120 readdir_msg->pvnr_eofflag = 0; 1121 readdir_msg->pvnr_dentoff = cookiemem; 1122 1123 error = puffs_msg_vn(pmp, park_readdir, PUFFS_VN_READDIR, 1124 0, vp, NULL); 1125 error = checkerr(pmp, error, __func__); 1126 if (error) 1127 goto out; 1128 1129 /* userspace is cheating? */ 1130 if (readdir_msg->pvnr_resid > resid) { 1131 puffs_msg_errnotify(pmp, PUFFS_ERR_READDIR, E2BIG, 1132 "resid grew", VPTOPNC(vp)); 1133 ERROUT(EPROTO); 1134 } 1135 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1136 puffs_msg_errnotify(pmp, PUFFS_ERR_READDIR, E2BIG, 1137 "too many cookies", VPTOPNC(vp)); 1138 ERROUT(EPROTO); 1139 } 1140 1141 /* check eof */ 1142 if (readdir_msg->pvnr_eofflag) 1143 *ap->a_eofflag = 1; 1144 1145 /* bouncy-wouncy with the directory data */ 1146 howmuch = resid - readdir_msg->pvnr_resid; 1147 1148 /* force eof if no data was returned (getcwd() needs this) */ 1149 if (howmuch == 0) { 1150 *ap->a_eofflag = 1; 1151 goto out; 1152 } 1153 1154 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1155 if (error) 1156 goto out; 1157 1158 /* provide cookies to caller if so desired */ 1159 if (ap->a_cookies) { 1160 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1161 M_TEMP, M_WAITOK); 1162 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1163 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1164 *ap->a_ncookies*CSIZE); 1165 } 1166 1167 /* next readdir starts here */ 1168 uio->uio_offset = readdir_msg->pvnr_offset; 1169 1170 out: 1171 puffs_msgmem_release(park_readdir); 1172 return error; 1173 } 1174 #undef CSIZE 1175 1176 /* 1177 * poll works by consuming the bitmask in pn_revents. If there are 1178 * events available, poll returns immediately. If not, it issues a 1179 * poll to userspace, selrecords itself and returns with no available 1180 * events. When the file server returns, it executes puffs_parkdone_poll(), 1181 * where available events are added to the bitmask. selnotify() is 1182 * then also executed by that function causing us to enter here again 1183 * and hopefully find the missing bits (unless someone got them first, 1184 * in which case it starts all over again). 1185 */ 1186 int 1187 puffs_poll(void *v) 1188 { 1189 struct vop_poll_args /* { 1190 const struct vnodeop_desc *a_desc; 1191 struct vnode *a_vp; 1192 int a_events; 1193 struct lwp *a_l; 1194 }*/ *ap = v; 1195 PUFFS_MSG_VARS(vn, poll); 1196 struct vnode *vp = ap->a_vp; 1197 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1198 struct puffs_node *pn = vp->v_data; 1199 int events; 1200 1201 if (EXISTSOP(pmp, POLL)) { 1202 mutex_enter(&pn->pn_mtx); 1203 events = pn->pn_revents & ap->a_events; 1204 if (events & ap->a_events) { 1205 pn->pn_revents &= ~ap->a_events; 1206 mutex_exit(&pn->pn_mtx); 1207 1208 return events; 1209 } else { 1210 puffs_referencenode(pn); 1211 mutex_exit(&pn->pn_mtx); 1212 1213 PUFFS_MSG_ALLOC(vn, poll); 1214 poll_msg->pvnr_events = ap->a_events; 1215 puffs_cidcvt(&poll_msg->pvnr_cid, ap->a_l); 1216 1217 selrecord(ap->a_l, &pn->pn_sel); 1218 puffs_msg_vncall(pmp, park_poll, PUFFS_VN_POLL, 0, 1219 puffs_parkdone_poll, pn, vp); 1220 PUFFS_MSG_RELEASE(poll); 1221 1222 return 0; 1223 } 1224 } else { 1225 return genfs_poll(v); 1226 } 1227 } 1228 1229 int 1230 puffs_fsync(void *v) 1231 { 1232 struct vop_fsync_args /* { 1233 const struct vnodeop_desc *a_desc; 1234 struct vnode *a_vp; 1235 kauth_cred_t a_cred; 1236 int a_flags; 1237 off_t a_offlo; 1238 off_t a_offhi; 1239 struct lwp *a_l; 1240 } */ *ap = v; 1241 PUFFS_MSG_VARS(vn, fsync); 1242 struct vnode *vp = ap->a_vp; 1243 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1244 struct puffs_node *pn; 1245 struct vattr va; 1246 int pflags, error, dofaf; 1247 1248 pn = VPTOPP(vp); 1249 1250 /* flush out information from our metacache, see vop_setattr */ 1251 if (pn->pn_stat & PNODE_METACACHE_MASK 1252 && (pn->pn_stat & PNODE_DYING) == 0) { 1253 vattr_null(&va); 1254 error = VOP_SETATTR(vp, &va, FSCRED, NULL); 1255 if (error) 1256 return error; 1257 } 1258 1259 /* 1260 * flush pages to avoid being overly dirty 1261 */ 1262 pflags = PGO_CLEANIT; 1263 if (ap->a_flags & FSYNC_WAIT) 1264 pflags |= PGO_SYNCIO; 1265 simple_lock(&vp->v_interlock); 1266 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1267 round_page(ap->a_offhi), pflags); 1268 if (error) 1269 return error; 1270 1271 /* 1272 * HELLO! We exit already here if the user server does not 1273 * support fsync OR if we should call fsync for a node which 1274 * has references neither in the kernel or the fs server. 1275 * Otherwise we continue to issue fsync() forward. 1276 */ 1277 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1278 return 0; 1279 1280 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1281 /* 1282 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1283 * only FAFs for those. Otherwise there's a danger of deadlock, 1284 * since the execution context here might be the user server 1285 * doing some operation on another fs, which in turn caused a 1286 * vnode to be reclaimed from the freelist for this fs. 1287 */ 1288 if (dofaf == 0) { 1289 simple_lock(&vp->v_interlock); 1290 if (vp->v_iflag & VI_XLOCK) 1291 dofaf = 1; 1292 simple_unlock(&vp->v_interlock); 1293 } 1294 1295 PUFFS_MSG_ALLOC(vn, fsync); 1296 if (dofaf) 1297 puffs_msg_setfaf(park_fsync); 1298 1299 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1300 fsync_msg->pvnr_flags = ap->a_flags; 1301 fsync_msg->pvnr_offlo = ap->a_offlo; 1302 fsync_msg->pvnr_offhi = ap->a_offhi; 1303 puffs_cidcvt(&fsync_msg->pvnr_cid, ap->a_l); 1304 1305 error = puffs_msg_vn(pmp, park_fsync, PUFFS_VN_FSYNC, 0, vp, NULL); 1306 PUFFS_MSG_RELEASE(fsync); 1307 1308 error = checkerr(pmp, error, __func__); 1309 1310 return error; 1311 } 1312 1313 int 1314 puffs_seek(void *v) 1315 { 1316 struct vop_seek_args /* { 1317 const struct vnodeop_desc *a_desc; 1318 struct vnode *a_vp; 1319 off_t a_oldoff; 1320 off_t a_newoff; 1321 kauth_cred_t a_cred; 1322 } */ *ap = v; 1323 PUFFS_MSG_VARS(vn, seek); 1324 struct vnode *vp = ap->a_vp; 1325 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1326 int error; 1327 1328 PUFFS_MSG_ALLOC(vn, seek); 1329 seek_msg->pvnr_oldoff = ap->a_oldoff; 1330 seek_msg->pvnr_newoff = ap->a_newoff; 1331 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1332 1333 error = puffs_msg_vn(pmp, park_seek, PUFFS_VN_SEEK, 0, vp, NULL); 1334 PUFFS_MSG_RELEASE(seek); 1335 return checkerr(pmp, error, __func__); 1336 } 1337 1338 static int 1339 puffs_callremove(struct puffs_mount *pmp, void *dcookie, void *cookie, 1340 struct componentname *cnp) 1341 { 1342 PUFFS_MSG_VARS(vn, remove); 1343 struct puffs_req *preq; 1344 int error; 1345 1346 PUFFS_MSG_ALLOC(vn, remove); 1347 remove_msg->pvnr_cookie_targ = cookie; 1348 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1349 &remove_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1350 1351 /* XXX: uh, this is wrong because we don't get setbacks with raw */ 1352 preq = (struct puffs_req *)remove_msg; 1353 preq->preq_cookie = dcookie; 1354 preq->preq_opclass = PUFFSOP_VN; 1355 preq->preq_optype = PUFFS_VN_REMOVE; 1356 1357 error = puffs_msg_raw(pmp, park_remove); 1358 PUFFS_MSG_RELEASE(remove); 1359 1360 return checkerr(pmp, error, __func__); 1361 } 1362 1363 /* 1364 * XXX: can't use callremove now because can't catch setbacks with 1365 * it due to lack of a vnode argument. 1366 */ 1367 int 1368 puffs_remove(void *v) 1369 { 1370 struct vop_remove_args /* { 1371 const struct vnodeop_desc *a_desc; 1372 struct vnode *a_dvp; 1373 struct vnode *a_vp; 1374 struct componentname *a_cnp; 1375 } */ *ap = v; 1376 PUFFS_MSG_VARS(vn, remove); 1377 struct vnode *dvp = ap->a_dvp; 1378 struct vnode *vp = ap->a_vp; 1379 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1380 struct componentname *cnp = ap->a_cnp; 1381 int error; 1382 1383 PUFFS_MSG_ALLOC(vn, remove); 1384 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1385 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1386 &remove_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1387 1388 error = puffs_msg_vn(pmp, park_remove, PUFFS_VN_REMOVE, 0, dvp, vp); 1389 PUFFS_MSG_RELEASE(remove); 1390 1391 error = checkerr(pmp, error, __func__); 1392 vput(vp); 1393 if (dvp == vp) 1394 vrele(dvp); 1395 else 1396 vput(dvp); 1397 1398 return error; 1399 } 1400 1401 int 1402 puffs_mkdir(void *v) 1403 { 1404 struct vop_mkdir_args /* { 1405 const struct vnodeop_desc *a_desc; 1406 struct vnode *a_dvp; 1407 struct vnode **a_vpp; 1408 struct componentname *a_cnp; 1409 struct vattr *a_vap; 1410 } */ *ap = v; 1411 PUFFS_MSG_VARS(vn, mkdir); 1412 struct vnode *dvp = ap->a_dvp; 1413 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1414 int error; 1415 1416 PUFFS_MSG_ALLOC(vn, mkdir); 1417 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1418 &mkdir_msg->pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1419 mkdir_msg->pvnr_va = *ap->a_vap; 1420 1421 error = puffs_msg_vn(pmp, park_mkdir, PUFFS_VN_MKDIR, 0, dvp, NULL); 1422 error = checkerr(pmp, error, __func__); 1423 if (error) 1424 goto out; 1425 1426 error = puffs_newnode(dvp->v_mount, dvp, ap->a_vpp, 1427 mkdir_msg->pvnr_newnode, ap->a_cnp, VDIR, 0); 1428 if (error) 1429 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, VPTOPNC(ap->a_dvp), 1430 mkdir_msg->pvnr_newnode, ap->a_cnp); 1431 1432 out: 1433 PUFFS_MSG_RELEASE(mkdir); 1434 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1435 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1436 vput(ap->a_dvp); 1437 return error; 1438 } 1439 1440 static int 1441 puffs_callrmdir(struct puffs_mount *pmp, void *dcookie, void *cookie, 1442 struct componentname *cnp) 1443 { 1444 PUFFS_MSG_VARS(vn, rmdir); 1445 struct puffs_req *preq; 1446 int error; 1447 1448 PUFFS_MSG_ALLOC(vn, rmdir); 1449 rmdir_msg->pvnr_cookie_targ = cookie; 1450 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1451 &rmdir_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1452 1453 /* XXX: uh, this is wrong because we don't get setbacks with raw */ 1454 preq = (struct puffs_req *)rmdir_msg; 1455 preq->preq_cookie = dcookie; 1456 preq->preq_opclass = PUFFSOP_VN; 1457 preq->preq_optype = PUFFS_VN_RMDIR; 1458 1459 error = puffs_msg_raw(pmp, park_rmdir); 1460 PUFFS_MSG_RELEASE(rmdir); 1461 1462 return checkerr(pmp, error, __func__); 1463 } 1464 1465 int 1466 puffs_rmdir(void *v) 1467 { 1468 struct vop_rmdir_args /* { 1469 const struct vnodeop_desc *a_desc; 1470 struct vnode *a_dvp; 1471 struct vnode *a_vp; 1472 struct componentname *a_cnp; 1473 } */ *ap = v; 1474 PUFFS_MSG_VARS(vn, rmdir); 1475 struct vnode *dvp = ap->a_dvp; 1476 struct vnode *vp = ap->a_vp; 1477 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1478 struct componentname *cnp = ap->a_cnp; 1479 int error; 1480 1481 PUFFS_MSG_ALLOC(vn, rmdir); 1482 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1483 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1484 &rmdir_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1485 1486 error = puffs_msg_vn(pmp, park_rmdir, PUFFS_VN_RMDIR, 0, dvp, vp); 1487 PUFFS_MSG_RELEASE(rmdir); 1488 1489 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1490 vput(dvp); 1491 vput(vp); 1492 1493 return error; 1494 } 1495 1496 int 1497 puffs_link(void *v) 1498 { 1499 struct vop_link_args /* { 1500 const struct vnodeop_desc *a_desc; 1501 struct vnode *a_dvp; 1502 struct vnode *a_vp; 1503 struct componentname *a_cnp; 1504 }*/ *ap = v; 1505 PUFFS_MSG_VARS(vn, link); 1506 struct vnode *dvp = ap->a_dvp; 1507 struct vnode *vp = ap->a_vp; 1508 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1509 int error; 1510 1511 PUFFS_MSG_ALLOC(vn, link); 1512 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1513 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1514 &link_msg->pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1515 1516 error = puffs_msg_vn(pmp, park_link, PUFFS_VN_LINK, 0, dvp, NULL); 1517 PUFFS_MSG_RELEASE(link); 1518 1519 error = checkerr(pmp, error, __func__); 1520 1521 /* 1522 * XXX: stay in touch with the cache. I don't like this, but 1523 * don't have a better solution either. See also puffs_rename(). 1524 */ 1525 if (error == 0) 1526 puffs_updatenode(vp, PUFFS_UPDATECTIME); 1527 1528 vput(dvp); 1529 1530 return error; 1531 } 1532 1533 int 1534 puffs_symlink(void *v) 1535 { 1536 struct vop_symlink_args /* { 1537 const struct vnodeop_desc *a_desc; 1538 struct vnode *a_dvp; 1539 struct vnode **a_vpp; 1540 struct componentname *a_cnp; 1541 struct vattr *a_vap; 1542 char *a_target; 1543 }*/ *ap = v; 1544 PUFFS_MSG_VARS(vn, symlink); 1545 struct vnode *dvp = ap->a_dvp; 1546 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1547 int error; 1548 1549 *ap->a_vpp = NULL; 1550 1551 PUFFS_MSG_ALLOC(vn, symlink); 1552 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1553 &symlink_msg->pvnr_cn_cid, ap->a_cnp, PUFFS_USE_FULLPNBUF(pmp)); 1554 symlink_msg->pvnr_va = *ap->a_vap; 1555 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1556 sizeof(symlink_msg->pvnr_link)); 1557 1558 error = puffs_msg_vn(pmp, park_symlink, PUFFS_VN_SYMLINK, 0, dvp,NULL); 1559 error = checkerr(pmp, error, __func__); 1560 if (error) 1561 goto out; 1562 1563 error = puffs_newnode(ap->a_dvp->v_mount, ap->a_dvp, ap->a_vpp, 1564 symlink_msg->pvnr_newnode, ap->a_cnp, VLNK, 0); 1565 if (error) 1566 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, VPTOPNC(ap->a_dvp), 1567 symlink_msg->pvnr_newnode, ap->a_cnp); 1568 1569 out: 1570 PUFFS_MSG_RELEASE(symlink); 1571 if (error || (ap->a_cnp->cn_flags & SAVESTART) == 0) 1572 PNBUF_PUT(ap->a_cnp->cn_pnbuf); 1573 vput(ap->a_dvp); 1574 1575 return error; 1576 } 1577 1578 int 1579 puffs_readlink(void *v) 1580 { 1581 struct vop_readlink_args /* { 1582 const struct vnodeop_desc *a_desc; 1583 struct vnode *a_vp; 1584 struct uio *a_uio; 1585 kauth_cred_t a_cred; 1586 } */ *ap = v; 1587 PUFFS_MSG_VARS(vn, readlink); 1588 struct vnode *vp = ap->a_vp; 1589 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1590 size_t linklen; 1591 int error; 1592 1593 PUFFS_MSG_ALLOC(vn, readlink); 1594 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1595 linklen = sizeof(readlink_msg->pvnr_link); 1596 readlink_msg->pvnr_linklen = linklen; 1597 1598 error = puffs_msg_vn(pmp, park_readlink, PUFFS_VN_READLINK, 0, vp,NULL); 1599 error = checkerr(pmp, error, __func__); 1600 if (error) 1601 goto out; 1602 1603 /* bad bad user file server */ 1604 if (readlink_msg->pvnr_linklen > linklen) { 1605 puffs_msg_errnotify(pmp, PUFFS_ERR_READLINK, E2BIG, 1606 "linklen too big", VPTOPNC(ap->a_vp)); 1607 error = EPROTO; 1608 goto out; 1609 } 1610 1611 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 1612 ap->a_uio); 1613 out: 1614 PUFFS_MSG_RELEASE(readlink); 1615 return error; 1616 } 1617 1618 int 1619 puffs_rename(void *v) 1620 { 1621 struct vop_rename_args /* { 1622 const struct vnodeop_desc *a_desc; 1623 struct vnode *a_fdvp; 1624 struct vnode *a_fvp; 1625 struct componentname *a_fcnp; 1626 struct vnode *a_tdvp; 1627 struct vnode *a_tvp; 1628 struct componentname *a_tcnp; 1629 }*/ *ap = v; 1630 PUFFS_MSG_VARS(vn, rename); 1631 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_fdvp->v_mount); 1632 int error; 1633 1634 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) 1635 ERROUT(EXDEV); 1636 1637 PUFFS_MSG_ALLOC(vn, rename); 1638 rename_msg->pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1639 rename_msg->pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1640 if (ap->a_tvp) 1641 rename_msg->pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1642 else 1643 rename_msg->pvnr_cookie_targ = NULL; 1644 puffs_makecn(&rename_msg->pvnr_cn_src, 1645 &rename_msg->pvnr_cn_src_cred, &rename_msg->pvnr_cn_src_cid, 1646 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1647 puffs_makecn(&rename_msg->pvnr_cn_targ, 1648 &rename_msg->pvnr_cn_targ_cred, &rename_msg->pvnr_cn_targ_cid, 1649 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1650 1651 error = puffs_msg_vn(pmp, park_rename, PUFFS_VN_RENAME, 1652 0, ap->a_fdvp, NULL); /* XXX: missing vnodes */ 1653 error = checkerr(pmp, error, __func__); 1654 1655 /* 1656 * XXX: stay in touch with the cache. I don't like this, but 1657 * don't have a better solution either. See also puffs_link(). 1658 */ 1659 if (error == 0) 1660 puffs_updatenode(ap->a_fvp, PUFFS_UPDATECTIME); 1661 1662 out: 1663 PUFFS_MSG_RELEASE(rename); 1664 if (ap->a_tvp != NULL) 1665 vput(ap->a_tvp); 1666 if (ap->a_tdvp == ap->a_tvp) 1667 vrele(ap->a_tdvp); 1668 else 1669 vput(ap->a_tdvp); 1670 1671 vrele(ap->a_fdvp); 1672 vrele(ap->a_fvp); 1673 1674 return error; 1675 } 1676 1677 #define RWARGS(cont, iofl, move, offset, creds) \ 1678 (cont)->pvnr_ioflag = (iofl); \ 1679 (cont)->pvnr_resid = (move); \ 1680 (cont)->pvnr_offset = (offset); \ 1681 puffs_credcvt(&(cont)->pvnr_cred, creds) 1682 1683 int 1684 puffs_read(void *v) 1685 { 1686 struct vop_read_args /* { 1687 const struct vnodeop_desc *a_desc; 1688 struct vnode *a_vp; 1689 struct uio *a_uio; 1690 int a_ioflag; 1691 kauth_cred_t a_cred; 1692 } */ *ap = v; 1693 PUFFS_MSG_VARS(vn, read); 1694 struct vnode *vp = ap->a_vp; 1695 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1696 struct uio *uio = ap->a_uio; 1697 void *win; 1698 size_t tomove, argsize; 1699 vsize_t bytelen; 1700 int error, ubcflags; 1701 1702 read_msg = NULL; 1703 error = 0; 1704 1705 /* std sanity */ 1706 if (uio->uio_resid == 0) 1707 return 0; 1708 if (uio->uio_offset < 0) 1709 return EINVAL; 1710 1711 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1712 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1713 1714 ubcflags = 0; 1715 if (UBC_WANT_UNMAP(vp)) 1716 ubcflags = UBC_UNMAP; 1717 1718 while (uio->uio_resid > 0) { 1719 bytelen = MIN(uio->uio_resid, 1720 vp->v_size - uio->uio_offset); 1721 if (bytelen == 0) 1722 break; 1723 1724 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1725 &bytelen, advice, UBC_READ); 1726 error = uiomove(win, bytelen, uio); 1727 ubc_release(win, ubcflags); 1728 if (error) 1729 break; 1730 } 1731 1732 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1733 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1734 } else { 1735 /* 1736 * in case it's not a regular file or we're operating 1737 * uncached, do read in the old-fashioned style, 1738 * i.e. explicit read operations 1739 */ 1740 1741 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1742 argsize = sizeof(struct puffs_vnmsg_read); 1743 puffs_msgmem_alloc(argsize + tomove, &park_read, 1744 (void **)&read_msg, 1); 1745 1746 error = 0; 1747 while (uio->uio_resid > 0) { 1748 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1749 RWARGS(read_msg, ap->a_ioflag, tomove, 1750 uio->uio_offset, ap->a_cred); 1751 1752 error = puffs_msg_vn(pmp, park_read, PUFFS_VN_READ, 1753 0, vp, NULL); 1754 error = checkerr(pmp, error, __func__); 1755 if (error) 1756 break; 1757 1758 if (read_msg->pvnr_resid > tomove) { 1759 puffs_msg_errnotify(pmp, PUFFS_ERR_READ, 1760 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1761 error = EPROTO; 1762 break; 1763 } 1764 1765 error = uiomove(read_msg->pvnr_data, 1766 tomove - read_msg->pvnr_resid, uio); 1767 1768 /* 1769 * in case the file is out of juice, resid from 1770 * userspace is != 0. and the error-case is 1771 * quite obvious 1772 */ 1773 if (error || read_msg->pvnr_resid) 1774 break; 1775 } 1776 1777 puffs_msgmem_release(park_read); 1778 } 1779 1780 return error; 1781 } 1782 1783 /* 1784 * XXX: in case of a failure, this leaves uio in a bad state. 1785 * We could theoretically copy the uio and iovecs and "replay" 1786 * them the right amount after the userspace trip, but don't 1787 * bother for now. 1788 */ 1789 int 1790 puffs_write(void *v) 1791 { 1792 struct vop_write_args /* { 1793 const struct vnodeop_desc *a_desc; 1794 struct vnode *a_vp; 1795 struct uio *a_uio; 1796 int a_ioflag; 1797 kauth_cred_t a_cred; 1798 } */ *ap = v; 1799 PUFFS_MSG_VARS(vn, write); 1800 struct vnode *vp = ap->a_vp; 1801 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1802 struct uio *uio = ap->a_uio; 1803 size_t tomove, argsize; 1804 off_t oldoff, newoff, origoff; 1805 vsize_t bytelen; 1806 int error, uflags; 1807 int ubcflags; 1808 1809 error = uflags = 0; 1810 write_msg = NULL; 1811 1812 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1813 ubcflags = UBC_WRITE | UBC_PARTIALOK; 1814 if (UBC_WANT_UNMAP(vp)) 1815 ubcflags |= UBC_UNMAP; 1816 1817 /* 1818 * userspace *should* be allowed to control this, 1819 * but with UBC it's a bit unclear how to handle it 1820 */ 1821 if (ap->a_ioflag & IO_APPEND) 1822 uio->uio_offset = vp->v_size; 1823 1824 origoff = uio->uio_offset; 1825 while (uio->uio_resid > 0) { 1826 uflags |= PUFFS_UPDATECTIME; 1827 uflags |= PUFFS_UPDATEMTIME; 1828 oldoff = uio->uio_offset; 1829 bytelen = uio->uio_resid; 1830 1831 newoff = oldoff + bytelen; 1832 if (vp->v_size < newoff) { 1833 uvm_vnp_setwritesize(vp, newoff); 1834 } 1835 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1836 UVM_ADV_RANDOM, ubcflags); 1837 1838 /* 1839 * In case of a ubc_uiomove() error, 1840 * opt to not extend the file at all and 1841 * return an error. Otherwise, if we attempt 1842 * to clear the memory we couldn't fault to, 1843 * we might generate a kernel page fault. 1844 */ 1845 if (vp->v_size < newoff) { 1846 if (error == 0) { 1847 uflags |= PUFFS_UPDATESIZE; 1848 uvm_vnp_setsize(vp, newoff); 1849 } else { 1850 uvm_vnp_setwritesize(vp, vp->v_size); 1851 } 1852 } 1853 if (error) 1854 break; 1855 1856 /* 1857 * If we're writing large files, flush to file server 1858 * every 64k. Otherwise we can very easily exhaust 1859 * kernel and user memory, as the file server cannot 1860 * really keep up with our writing speed. 1861 * 1862 * Note: this does *NOT* honor MNT_ASYNC, because 1863 * that gives userland too much say in the kernel. 1864 */ 1865 if (oldoff >> 16 != uio->uio_offset >> 16) { 1866 simple_lock(&vp->v_interlock); 1867 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1868 uio->uio_offset & ~0xffff, 1869 PGO_CLEANIT | PGO_SYNCIO); 1870 if (error) 1871 break; 1872 } 1873 } 1874 1875 /* synchronous I/O? */ 1876 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1877 simple_lock(&vp->v_interlock); 1878 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1879 round_page(uio->uio_offset), 1880 PGO_CLEANIT | PGO_SYNCIO); 1881 1882 /* write through page cache? */ 1883 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1884 simple_lock(&vp->v_interlock); 1885 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1886 round_page(uio->uio_offset), PGO_CLEANIT); 1887 } 1888 1889 puffs_updatenode(vp, uflags); 1890 } else { 1891 /* tomove is non-increasing */ 1892 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1893 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 1894 puffs_msgmem_alloc(argsize, &park_write, (void **)&write_msg,1); 1895 1896 while (uio->uio_resid > 0) { 1897 /* move data to buffer */ 1898 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1899 RWARGS(write_msg, ap->a_ioflag, tomove, 1900 uio->uio_offset, ap->a_cred); 1901 error = uiomove(write_msg->pvnr_data, tomove, uio); 1902 if (error) 1903 break; 1904 1905 /* move buffer to userspace */ 1906 error = puffs_msg_vn(pmp, park_write, PUFFS_VN_WRITE, 1907 0, vp, NULL); 1908 error = checkerr(pmp, error, __func__); 1909 if (error) 1910 break; 1911 1912 if (write_msg->pvnr_resid > tomove) { 1913 puffs_msg_errnotify(pmp, PUFFS_ERR_WRITE, 1914 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1915 error = EPROTO; 1916 break; 1917 } 1918 1919 /* adjust file size */ 1920 if (vp->v_size < uio->uio_offset) 1921 uvm_vnp_setsize(vp, uio->uio_offset); 1922 1923 /* didn't move everything? bad userspace. bail */ 1924 if (write_msg->pvnr_resid != 0) { 1925 error = EIO; 1926 break; 1927 } 1928 } 1929 puffs_msgmem_release(park_write); 1930 } 1931 1932 return error; 1933 } 1934 1935 int 1936 puffs_print(void *v) 1937 { 1938 struct vop_print_args /* { 1939 struct vnode *a_vp; 1940 } */ *ap = v; 1941 PUFFS_MSG_VARS(vn, print); 1942 struct vnode *vp = ap->a_vp; 1943 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1944 struct puffs_node *pn = vp->v_data; 1945 1946 /* kernel portion */ 1947 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 1948 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 1949 if (vp->v_type == VFIFO) 1950 fifo_printinfo(vp); 1951 lockmgr_printinfo(&vp->v_lock); 1952 1953 /* userspace portion */ 1954 if (EXISTSOP(pmp, PRINT)) { 1955 PUFFS_MSG_ALLOC(vn, print); 1956 puffs_msg_vn(pmp, park_print, PUFFS_VN_PRINT, 0, vp, NULL); 1957 PUFFS_MSG_RELEASE(print); 1958 } 1959 1960 return 0; 1961 } 1962 1963 int 1964 puffs_pathconf(void *v) 1965 { 1966 struct vop_pathconf_args /* { 1967 const struct vnodeop_desc *a_desc; 1968 struct vnode *a_vp; 1969 int a_name; 1970 register_t *a_retval; 1971 } */ *ap = v; 1972 PUFFS_MSG_VARS(vn, pathconf); 1973 struct vnode *vp = ap->a_vp; 1974 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1975 int error; 1976 1977 PUFFS_MSG_ALLOC(vn, pathconf); 1978 pathconf_msg->pvnr_name = ap->a_name; 1979 error = puffs_msg_vn(pmp, park_pathconf, PUFFS_VN_PATHCONF, 0, vp,NULL); 1980 error = checkerr(pmp, error, __func__); 1981 if (!error) 1982 *ap->a_retval = pathconf_msg->pvnr_retval; 1983 PUFFS_MSG_RELEASE(pathconf); 1984 1985 return error; 1986 } 1987 1988 int 1989 puffs_advlock(void *v) 1990 { 1991 struct vop_advlock_args /* { 1992 const struct vnodeop_desc *a_desc; 1993 struct vnode *a_vp; 1994 void *a_id; 1995 int a_op; 1996 struct flock *a_fl; 1997 int a_flags; 1998 } */ *ap = v; 1999 PUFFS_MSG_VARS(vn, advlock); 2000 struct vnode *vp = ap->a_vp; 2001 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2002 int error; 2003 2004 PUFFS_MSG_ALLOC(vn, advlock); 2005 error = copyin(ap->a_fl, &advlock_msg->pvnr_fl, sizeof(struct flock)); 2006 if (error) 2007 goto out; 2008 advlock_msg->pvnr_id = ap->a_id; 2009 advlock_msg->pvnr_op = ap->a_op; 2010 advlock_msg->pvnr_flags = ap->a_flags; 2011 2012 error = puffs_msg_vn(pmp, park_advlock, PUFFS_VN_ADVLOCK, 0, vp, NULL); 2013 error = checkerr(pmp, error, __func__); 2014 2015 out: 2016 PUFFS_MSG_RELEASE(advlock); 2017 return error; 2018 } 2019 2020 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2021 #define BIOREAD(bp) (bp->b_flags & B_READ) 2022 #define BIOWRITE(bp) ((bp->b_flags & B_READ) == 0) 2023 2024 /* 2025 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2026 */ 2027 2028 /* XXX: if this is called from interrupt context, we lose */ 2029 int 2030 puffs_strategy(void *v) 2031 { 2032 struct vop_strategy_args /* { 2033 const struct vnodeop_desc *a_desc; 2034 struct vnode *a_vp; 2035 struct buf *a_bp; 2036 } */ *ap = v; 2037 PUFFS_MSG_VARS(vn, rw); 2038 struct vnode *vp = ap->a_vp; 2039 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2040 struct puffs_node *pn; 2041 struct buf *bp; 2042 size_t argsize; 2043 size_t tomove, moved; 2044 int error, dofaf; 2045 2046 pmp = MPTOPUFFSMP(vp->v_mount); 2047 bp = ap->a_bp; 2048 error = 0; 2049 dofaf = 0; 2050 pn = VPTOPP(vp); 2051 park_rw = NULL; /* explicit */ 2052 2053 if ((BIOREAD(bp) && !EXISTSOP(pmp, READ)) 2054 || (BIOWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2055 ERROUT(EOPNOTSUPP); 2056 2057 /* 2058 * Short-circuit optimization: don't flush buffer in between 2059 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2060 */ 2061 if (pn->pn_stat & PNODE_DYING) { 2062 KASSERT(BIOWRITE(bp)); 2063 bp->b_resid = 0; 2064 goto out; 2065 } 2066 2067 #ifdef DIAGNOSTIC 2068 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2069 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2070 bp->b_bcount); 2071 #endif 2072 2073 /* 2074 * See explanation for the necessity of a FAF in puffs_fsync. 2075 * 2076 * Also, do FAF in case we're suspending. 2077 * See puffs_vfsops.c:pageflush() 2078 */ 2079 if (BIOWRITE(bp)) { 2080 simple_lock(&vp->v_interlock); 2081 if (vp->v_iflag & VI_XLOCK) 2082 dofaf = 1; 2083 if (pn->pn_stat & PNODE_SUSPEND) 2084 dofaf = 1; 2085 simple_unlock(&vp->v_interlock); 2086 } 2087 2088 if (BIOASYNC(bp)) 2089 dofaf = 1; 2090 2091 #ifdef DIAGNOSTIC 2092 if (curlwp == uvm.pagedaemon_lwp) 2093 KASSERT(dofaf); 2094 #endif 2095 2096 /* allocate transport structure */ 2097 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2098 argsize = sizeof(struct puffs_vnmsg_rw); 2099 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2100 (void **)&rw_msg, dofaf ? 0 : 1); 2101 if (error) 2102 goto out; 2103 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2104 2105 /* 2x2 cases: read/write, faf/nofaf */ 2106 if (BIOREAD(bp)) { 2107 if (dofaf) { 2108 puffs_msg_vncall(pmp, park_rw, PUFFS_VN_READ, 0, 2109 puffs_parkdone_asyncbioread, bp, vp); 2110 } else { 2111 error = puffs_msg_vn(pmp, park_rw, PUFFS_VN_READ, 2112 0, vp, NULL); 2113 error = checkerr(pmp, error, __func__); 2114 if (error) 2115 goto out; 2116 2117 if (rw_msg->pvnr_resid > tomove) { 2118 puffs_msg_errnotify(pmp, PUFFS_ERR_READ, 2119 E2BIG, "resid grew", VPTOPNC(vp)); 2120 ERROUT(EPROTO); 2121 } 2122 2123 moved = tomove - rw_msg->pvnr_resid; 2124 2125 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2126 bp->b_resid = bp->b_bcount - moved; 2127 } 2128 } else { 2129 /* 2130 * make pages read-only before we write them if we want 2131 * write caching info 2132 */ 2133 if (PUFFS_WCACHEINFO(pmp)) { 2134 struct uvm_object *uobj = &vp->v_uobj; 2135 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2136 struct vm_page *vmp; 2137 int i; 2138 2139 for (i = 0; i < npages; i++) { 2140 vmp= uvm_pageratop((vaddr_t)bp->b_data 2141 + (i << PAGE_SHIFT)); 2142 DPRINTF(("puffs_strategy: write-protecting " 2143 "vp %p page %p, offset %" PRId64"\n", 2144 vp, vmp, vmp->offset)); 2145 simple_lock(&uobj->vmobjlock); 2146 vmp->flags |= PG_RDONLY; 2147 pmap_page_protect(vmp, VM_PROT_READ); 2148 simple_unlock(&uobj->vmobjlock); 2149 } 2150 } 2151 2152 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2153 if (dofaf) 2154 puffs_msg_setfaf(park_rw); 2155 error = puffs_msg_vn(pmp, park_rw, PUFFS_VN_WRITE, 0, vp, NULL); 2156 2157 if (dofaf) { 2158 /* 2159 * FAF moves everything. Frankly, we don't 2160 * really have a choice. 2161 */ 2162 KASSERT(error == 0); 2163 bp->b_resid = bp->b_bcount - tomove; 2164 } else { 2165 error = checkerr(pmp, error, __func__); 2166 if (error) 2167 goto out; 2168 2169 moved = tomove - rw_msg->pvnr_resid; 2170 if (rw_msg->pvnr_resid > tomove) { 2171 puffs_msg_errnotify(pmp, PUFFS_ERR_WRITE, 2172 E2BIG, "resid grew", VPTOPNC(vp)); 2173 ERROUT(EPROTO); 2174 } 2175 2176 bp->b_resid = bp->b_bcount - moved; 2177 if (rw_msg->pvnr_resid != 0) { 2178 ERROUT(EIO); 2179 } 2180 } 2181 } 2182 2183 out: 2184 if (park_rw) 2185 puffs_msgmem_release(park_rw); 2186 2187 if (error) 2188 bp->b_error = error; 2189 2190 if (error || !(BIOREAD(bp) && BIOASYNC(bp))) 2191 biodone(bp); 2192 2193 return error; 2194 } 2195 2196 int 2197 puffs_mmap(void *v) 2198 { 2199 struct vop_mmap_args /* { 2200 const struct vnodeop_desc *a_desc; 2201 struct vnode *a_vp; 2202 vm_prot_t a_prot; 2203 kauth_cred_t a_cred; 2204 struct lwp *a_l; 2205 } */ *ap = v; 2206 PUFFS_MSG_VARS(vn, mmap); 2207 struct vnode *vp = ap->a_vp; 2208 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2209 int error; 2210 2211 if (!PUFFS_USE_PAGECACHE(pmp)) 2212 return genfs_eopnotsupp(v); 2213 2214 if (EXISTSOP(pmp, MMAP)) { 2215 PUFFS_MSG_ALLOC(vn, mmap); 2216 mmap_msg->pvnr_prot = ap->a_prot; 2217 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2218 puffs_cidcvt(&mmap_msg->pvnr_cid, ap->a_l); 2219 2220 error = puffs_msg_vn(pmp, park_mmap, PUFFS_VN_MMAP, 2221 0, vp, NULL); 2222 error = checkerr(pmp, error, __func__); 2223 PUFFS_MSG_RELEASE(mmap); 2224 } else { 2225 error = genfs_mmap(v); 2226 } 2227 2228 return error; 2229 } 2230 2231 2232 /* 2233 * The rest don't get a free trip to userspace and back, they 2234 * have to stay within the kernel. 2235 */ 2236 2237 /* 2238 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2239 * well, maybe somehow, somewhere, some day .... 2240 */ 2241 int 2242 puffs_bmap(void *v) 2243 { 2244 struct vop_bmap_args /* { 2245 const struct vnodeop_desc *a_desc; 2246 struct vnode *a_vp; 2247 daddr_t a_bn; 2248 struct vnode **a_vpp; 2249 daddr_t *a_bnp; 2250 int *a_runp; 2251 } */ *ap = v; 2252 struct puffs_mount *pmp; 2253 2254 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2255 2256 if (ap->a_vpp) 2257 *ap->a_vpp = ap->a_vp; 2258 if (ap->a_bnp) 2259 *ap->a_bnp = ap->a_bn; 2260 if (ap->a_runp) 2261 *ap->a_runp 2262 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2263 2264 return 0; 2265 } 2266 2267 /* 2268 * Handle getpages faults in puffs. We let genfs_getpages() do most 2269 * of the dirty work, but we come in this route to do accounting tasks. 2270 * If the user server has specified functions for cache notifications 2271 * about reads and/or writes, we record which type of operation we got, 2272 * for which page range, and proceed to issue a FAF notification to the 2273 * server about it. 2274 */ 2275 int 2276 puffs_getpages(void *v) 2277 { 2278 struct vop_getpages_args /* { 2279 const struct vnodeop_desc *a_desc; 2280 struct vnode *a_vp; 2281 voff_t a_offset; 2282 struct vm_page **a_m; 2283 int *a_count; 2284 int a_centeridx; 2285 vm_prot_t a_access_type; 2286 int a_advice; 2287 int a_flags; 2288 } */ *ap = v; 2289 struct puffs_mount *pmp; 2290 struct puffs_node *pn; 2291 struct vnode *vp; 2292 struct vm_page **pgs; 2293 struct puffs_cacheinfo *pcinfo = NULL; 2294 struct puffs_cacherun *pcrun; 2295 void *parkmem = NULL; 2296 size_t runsizes; 2297 int i, npages, si, streakon; 2298 int error, locked, write; 2299 2300 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2301 npages = *ap->a_count; 2302 pgs = ap->a_m; 2303 vp = ap->a_vp; 2304 pn = vp->v_data; 2305 locked = (ap->a_flags & PGO_LOCKED) != 0; 2306 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2307 2308 /* ccg xnaht - gets Wuninitialized wrong */ 2309 pcrun = NULL; 2310 runsizes = 0; 2311 2312 /* 2313 * Check that we aren't trying to fault in pages which our file 2314 * server doesn't know about. This happens if we extend a file by 2315 * skipping some pages and later try to fault in pages which 2316 * are between pn_serversize and vp_size. This check optimizes 2317 * away the common case where a file is being extended. 2318 */ 2319 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2320 struct vattr va; 2321 2322 /* try again later when we can block */ 2323 if (locked) 2324 ERROUT(EBUSY); 2325 2326 simple_unlock(&vp->v_interlock); 2327 vattr_null(&va); 2328 va.va_size = vp->v_size; 2329 error = puffs_dosetattr(vp, &va, FSCRED, NULL, 0); 2330 if (error) 2331 ERROUT(error); 2332 simple_lock(&vp->v_interlock); 2333 } 2334 2335 if (write && PUFFS_WCACHEINFO(pmp)) { 2336 #ifdef notnowjohn 2337 /* allocate worst-case memory */ 2338 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2339 pcinfo = malloc(sizeof(struct puffs_cacheinfo) + runsizes, 2340 M_PUFFS, M_ZERO | locked ? M_NOWAIT : M_WAITOK); 2341 2342 /* 2343 * can't block if we're locked and can't mess up caching 2344 * information for fs server. so come back later, please 2345 */ 2346 if (pcinfo == NULL) 2347 ERROUT(ENOMEM); 2348 2349 parkmem = puffs_park_alloc(locked == 0); 2350 if (parkmem == NULL) 2351 ERROUT(ENOMEM); 2352 2353 pcrun = pcinfo->pcache_runs; 2354 #else 2355 (void)parkmem; 2356 #endif 2357 } 2358 2359 error = genfs_getpages(v); 2360 if (error) 2361 goto out; 2362 2363 if (PUFFS_WCACHEINFO(pmp) == 0) 2364 goto out; 2365 2366 /* 2367 * Let's see whose fault it was and inform the user server of 2368 * possibly read/written pages. Map pages from read faults 2369 * strictly read-only, since otherwise we might miss info on 2370 * when the page is actually write-faulted to. 2371 */ 2372 if (!locked) 2373 simple_lock(&vp->v_uobj.vmobjlock); 2374 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2375 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2376 if (streakon && write) { 2377 streakon = 0; 2378 pcrun[si].pcache_runend 2379 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2380 si++; 2381 } 2382 continue; 2383 } 2384 if (streakon == 0 && write) { 2385 streakon = 1; 2386 pcrun[si].pcache_runstart = pgs[i]->offset; 2387 } 2388 2389 if (!write) 2390 pgs[i]->flags |= PG_RDONLY; 2391 } 2392 /* was the last page part of our streak? */ 2393 if (streakon) { 2394 pcrun[si].pcache_runend 2395 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2396 si++; 2397 } 2398 if (!locked) 2399 simple_unlock(&vp->v_uobj.vmobjlock); 2400 2401 KASSERT(si <= (npages / 2) + 1); 2402 2403 #ifdef notnowjohn 2404 /* send results to userspace */ 2405 if (write) 2406 puffs_cacheop(pmp, parkmem, pcinfo, 2407 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2408 #endif 2409 2410 out: 2411 if (error) { 2412 if (pcinfo != NULL) 2413 free(pcinfo, M_PUFFS); 2414 #ifdef notnowjohn 2415 if (parkmem != NULL) 2416 puffs_park_release(parkmem, 1); 2417 #endif 2418 } 2419 2420 return error; 2421 } 2422 2423 int 2424 puffs_lock(void *v) 2425 { 2426 struct vop_lock_args /* { 2427 struct vnode *a_vp; 2428 int a_flags; 2429 }*/ *ap = v; 2430 struct vnode *vp = ap->a_vp; 2431 struct mount *mp = vp->v_mount; 2432 2433 #if 0 2434 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2435 #endif 2436 2437 /* 2438 * XXX: this avoids deadlocking when we're suspending. 2439 * e.g. some ops holding the vnode lock might be blocked for 2440 * the vfs transaction lock so we'd deadlock. 2441 * 2442 * Now once again this is skating on the thin ice of modern life, 2443 * since we are breaking the consistency guarantee provided 2444 * _to the user server_ by vnode locking. Hopefully this will 2445 * get fixed soon enough by getting rid of the dependency on 2446 * vnode locks alltogether. 2447 */ 2448 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2449 if (ap->a_flags & LK_INTERLOCK) 2450 simple_unlock(&vp->v_interlock); 2451 return 0; 2452 } 2453 2454 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2455 } 2456 2457 int 2458 puffs_unlock(void *v) 2459 { 2460 struct vop_unlock_args /* { 2461 struct vnode *a_vp; 2462 int a_flags; 2463 } */ *ap = v; 2464 struct vnode *vp = ap->a_vp; 2465 struct mount *mp = vp->v_mount; 2466 2467 #if 0 2468 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2469 #endif 2470 2471 /* XXX: see puffs_lock() */ 2472 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2473 if (ap->a_flags & LK_INTERLOCK) 2474 simple_unlock(&vp->v_interlock); 2475 return 0; 2476 } 2477 2478 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2479 } 2480 2481 int 2482 puffs_islocked(void *v) 2483 { 2484 struct vop_islocked_args *ap = v; 2485 int rv; 2486 2487 rv = lockstatus(&ap->a_vp->v_lock); 2488 return rv; 2489 } 2490 2491 int 2492 puffs_generic(void *v) 2493 { 2494 struct vop_generic_args *ap = v; 2495 2496 (void)ap; 2497 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2498 2499 return EOPNOTSUPP; 2500 } 2501 2502 2503 /* 2504 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2505 * FAF update information for the puffs node first. 2506 */ 2507 int 2508 puffs_spec_read(void *v) 2509 { 2510 struct vop_read_args /* { 2511 const struct vnodeop_desc *a_desc; 2512 struct vnode *a_vp; 2513 struct uio *a_uio; 2514 int a_ioflag; 2515 kauth_cred_t a_cred; 2516 } */ *ap = v; 2517 2518 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2519 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2520 } 2521 2522 int 2523 puffs_spec_write(void *v) 2524 { 2525 struct vop_write_args /* { 2526 const struct vnodeop_desc *a_desc; 2527 struct vnode *a_vp; 2528 struct uio *a_uio; 2529 int a_ioflag; 2530 kauth_cred_t a_cred; 2531 }*/ *ap = v; 2532 2533 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2534 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2535 } 2536 2537 int 2538 puffs_fifo_read(void *v) 2539 { 2540 struct vop_read_args /* { 2541 const struct vnodeop_desc *a_desc; 2542 struct vnode *a_vp; 2543 struct uio *a_uio; 2544 int a_ioflag; 2545 kauth_cred_t a_cred; 2546 } */ *ap = v; 2547 2548 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2549 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2550 } 2551 2552 int 2553 puffs_fifo_write(void *v) 2554 { 2555 struct vop_write_args /* { 2556 const struct vnodeop_desc *a_desc; 2557 struct vnode *a_vp; 2558 struct uio *a_uio; 2559 int a_ioflag; 2560 kauth_cred_t a_cred; 2561 }*/ *ap = v; 2562 2563 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2564 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2565 } 2566
Indexes created Sat Sep 27 14:09:57 GMT 2025