puffs_vnops.c revision 1.122
1 /* $NetBSD: puffs_vnops.c,v 1.122 2007/12/08 19:57:04 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 1.122 2007/12/08 19:57:04 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); 409 static void puffs_callreclaim(struct puffs_mount *, void *); 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); 437 puffs_callreclaim(pmp, cookie); 438 } 439 440 /* 441 * Begin vnode operations. 442 * 443 * A word from the keymaster about locks: generally we don't want 444 * to use the vnode locks at all: it creates an ugly dependency between 445 * the userlandia file server and the kernel. But we'll play along with 446 * the kernel vnode locks for now. However, even currently we attempt 447 * to release locks as early as possible. This is possible for some 448 * operations which a) don't need a locked vnode after the userspace op 449 * and b) return with the vnode unlocked. Theoretically we could 450 * unlock-do op-lock for others and order the graph in userspace, but I 451 * don't want to think of the consequences for the time being. 452 */ 453 454 int 455 puffs_lookup(void *v) 456 { 457 struct vop_lookup_args /* { 458 const struct vnodeop_desc *a_desc; 459 struct vnode *a_dvp; 460 struct vnode **a_vpp; 461 struct componentname *a_cnp; 462 } */ *ap = v; 463 PUFFS_MSG_VARS(vn, lookup); 464 struct puffs_mount *pmp; 465 struct componentname *cnp; 466 struct vnode *vp, *dvp; 467 struct puffs_node *dpn; 468 int isdot; 469 int error; 470 471 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 472 cnp = ap->a_cnp; 473 dvp = ap->a_dvp; 474 *ap->a_vpp = NULL; 475 476 /* r/o fs? we check create later to handle EEXIST */ 477 if ((cnp->cn_flags & ISLASTCN) 478 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 479 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 480 return EROFS; 481 482 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 483 484 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 485 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 486 487 /* 488 * Check if someone fed it into the cache 489 */ 490 if (PUFFS_USE_NAMECACHE(pmp)) { 491 error = cache_lookup(dvp, ap->a_vpp, cnp); 492 493 if (error >= 0) 494 return error; 495 } 496 497 if (isdot) { 498 vp = ap->a_dvp; 499 vref(vp); 500 *ap->a_vpp = vp; 501 return 0; 502 } 503 504 PUFFS_MSG_ALLOC(vn, lookup); 505 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 506 cnp, PUFFS_USE_FULLPNBUF(pmp)); 507 508 if (cnp->cn_flags & ISDOTDOT) 509 VOP_UNLOCK(dvp, 0); 510 511 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 512 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 513 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 514 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 515 516 /* 517 * In case of error, there is no new vnode to play with, so be 518 * happy with the NULL value given to vpp in the beginning. 519 * Also, check if this really was an error or the target was not 520 * present. Either treat it as a non-error for CREATE/RENAME or 521 * enter the component into the negative name cache (if desired). 522 */ 523 if (error) { 524 error = checkerr(pmp, error, __func__); 525 if (error == ENOENT) { 526 /* don't allow to create files on r/o fs */ 527 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 528 && cnp->cn_nameiop == CREATE) { 529 error = EROFS; 530 531 /* adjust values if we are creating */ 532 } else if ((cnp->cn_flags & ISLASTCN) 533 && (cnp->cn_nameiop == CREATE 534 || cnp->cn_nameiop == RENAME)) { 535 cnp->cn_flags |= SAVENAME; 536 error = EJUSTRETURN; 537 538 /* save negative cache entry */ 539 } else { 540 if ((cnp->cn_flags & MAKEENTRY) 541 && PUFFS_USE_NAMECACHE(pmp)) 542 cache_enter(dvp, NULL, cnp); 543 } 544 } 545 goto out; 546 } 547 548 /* 549 * Check that we don't get our parent node back, that would cause 550 * a pretty obvious deadlock. 551 */ 552 dpn = dvp->v_data; 553 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 554 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 555 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 556 error = EPROTO; 557 goto out; 558 } 559 560 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 1, 1, &vp); 561 if (error == PUFFS_NOSUCHCOOKIE) { 562 error = puffs_getvnode(dvp->v_mount, 563 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 564 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 565 if (error) { 566 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 567 lookup_msg->pvnr_newnode, ap->a_cnp); 568 goto out; 569 } 570 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 571 } else if (error) { 572 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 573 lookup_msg->pvnr_newnode, ap->a_cnp); 574 goto out; 575 } 576 577 *ap->a_vpp = vp; 578 579 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_USE_NAMECACHE(pmp)) 580 cache_enter(dvp, vp, cnp); 581 582 /* XXX */ 583 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 584 cnp->cn_flags &= ~REQUIREDIR; 585 if (lookup_msg->pvnr_cn.pkcn_consume) 586 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 587 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 588 589 out: 590 if (cnp->cn_flags & ISDOTDOT) 591 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 592 593 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 594 PUFFS_MSG_RELEASE(lookup); 595 return error; 596 } 597 598 #define REFPN_AND_UNLOCKVP(a, b) \ 599 do { \ 600 mutex_enter(&b->pn_mtx); \ 601 puffs_referencenode(b); \ 602 mutex_exit(&b->pn_mtx); \ 603 VOP_UNLOCK(a, 0); \ 604 } while (/*CONSTCOND*/0) 605 606 #define REFPN(b) \ 607 do { \ 608 mutex_enter(&b->pn_mtx); \ 609 puffs_referencenode(b); \ 610 mutex_exit(&b->pn_mtx); \ 611 } while (/*CONSTCOND*/0) 612 613 #define RELEPN_AND_VP(a, b) \ 614 do { \ 615 puffs_releasenode(b); \ 616 vrele(a); \ 617 } while (/*CONSTCOND*/0) 618 619 int 620 puffs_create(void *v) 621 { 622 struct vop_create_args /* { 623 const struct vnodeop_desc *a_desc; 624 struct vnode *a_dvp; 625 struct vnode **a_vpp; 626 struct componentname *a_cnp; 627 struct vattr *a_vap; 628 } */ *ap = v; 629 PUFFS_MSG_VARS(vn, create); 630 struct vnode *dvp = ap->a_dvp; 631 struct puffs_node *dpn = VPTOPP(dvp); 632 struct componentname *cnp = ap->a_cnp; 633 struct mount *mp = dvp->v_mount; 634 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 635 int error; 636 637 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 638 dvp, ap->a_cnp->cn_nameptr)); 639 640 PUFFS_MSG_ALLOC(vn, create); 641 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 642 cnp, PUFFS_USE_FULLPNBUF(pmp)); 643 create_msg->pvnr_va = *ap->a_vap; 644 puffs_msg_setinfo(park_create, PUFFSOP_VN, 645 PUFFS_VN_CREATE, VPTOPNC(dvp)); 646 647 /* 648 * Do the dance: 649 * + insert into queue ("interlock") 650 * + unlock vnode 651 * + wait for response 652 */ 653 puffs_msg_enqueue(pmp, park_create); 654 REFPN_AND_UNLOCKVP(dvp, dpn); 655 error = puffs_msg_wait2(pmp, park_create, dpn, NULL); 656 657 error = checkerr(pmp, error, __func__); 658 if (error) 659 goto out; 660 661 error = puffs_newnode(mp, dvp, ap->a_vpp, 662 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 663 if (error) 664 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 665 create_msg->pvnr_newnode, cnp); 666 667 out: 668 if (error || (cnp->cn_flags & SAVESTART) == 0) 669 PNBUF_PUT(cnp->cn_pnbuf); 670 671 RELEPN_AND_VP(dvp, dpn); 672 DPRINTF(("puffs_create: return %d\n", error)); 673 PUFFS_MSG_RELEASE(create); 674 return error; 675 } 676 677 int 678 puffs_mknod(void *v) 679 { 680 struct vop_mknod_args /* { 681 const struct vnodeop_desc *a_desc; 682 struct vnode *a_dvp; 683 struct vnode **a_vpp; 684 struct componentname *a_cnp; 685 struct vattr *a_vap; 686 } */ *ap = v; 687 PUFFS_MSG_VARS(vn, mknod); 688 struct vnode *dvp = ap->a_dvp; 689 struct puffs_node *dpn = VPTOPP(dvp); 690 struct componentname *cnp = ap->a_cnp; 691 struct mount *mp = dvp->v_mount; 692 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 693 int error; 694 695 PUFFS_MSG_ALLOC(vn, mknod); 696 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 697 cnp, PUFFS_USE_FULLPNBUF(pmp)); 698 mknod_msg->pvnr_va = *ap->a_vap; 699 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 700 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 701 702 puffs_msg_enqueue(pmp, park_mknod); 703 REFPN_AND_UNLOCKVP(dvp, dpn); 704 error = puffs_msg_wait2(pmp, park_mknod, dpn, NULL); 705 706 error = checkerr(pmp, error, __func__); 707 if (error) 708 goto out; 709 710 error = puffs_newnode(mp, dvp, ap->a_vpp, 711 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 712 ap->a_vap->va_rdev); 713 if (error) 714 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 715 mknod_msg->pvnr_newnode, cnp); 716 717 out: 718 PUFFS_MSG_RELEASE(mknod); 719 if (error || (cnp->cn_flags & SAVESTART) == 0) 720 PNBUF_PUT(cnp->cn_pnbuf); 721 RELEPN_AND_VP(dvp, dpn); 722 return error; 723 } 724 725 int 726 puffs_open(void *v) 727 { 728 struct vop_open_args /* { 729 const struct vnodeop_desc *a_desc; 730 struct vnode *a_vp; 731 int a_mode; 732 kauth_cred_t a_cred; 733 } */ *ap = v; 734 PUFFS_MSG_VARS(vn, open); 735 struct vnode *vp = ap->a_vp; 736 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 737 int mode = ap->a_mode; 738 int error; 739 740 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 741 742 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 743 ERROUT(EROFS); 744 745 if (!EXISTSOP(pmp, OPEN)) 746 ERROUT(0); 747 748 PUFFS_MSG_ALLOC(vn, open); 749 open_msg->pvnr_mode = mode; 750 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 751 puffs_msg_setinfo(park_open, PUFFSOP_VN, 752 PUFFS_VN_OPEN, VPTOPNC(vp)); 753 754 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 755 error = checkerr(pmp, error, __func__); 756 757 out: 758 DPRINTF(("puffs_open: returning %d\n", error)); 759 PUFFS_MSG_RELEASE(open); 760 return error; 761 } 762 763 int 764 puffs_close(void *v) 765 { 766 struct vop_close_args /* { 767 const struct vnodeop_desc *a_desc; 768 struct vnode *a_vp; 769 int a_fflag; 770 kauth_cred_t a_cred; 771 } */ *ap = v; 772 PUFFS_MSG_VARS(vn, close); 773 struct vnode *vp = ap->a_vp; 774 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 775 776 PUFFS_MSG_ALLOC(vn, close); 777 puffs_msg_setfaf(park_close); 778 close_msg->pvnr_fflag = ap->a_fflag; 779 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 780 puffs_msg_setinfo(park_close, PUFFSOP_VN, 781 PUFFS_VN_CLOSE, VPTOPNC(vp)); 782 783 puffs_msg_enqueue(pmp, park_close); 784 PUFFS_MSG_RELEASE(close); 785 return 0; 786 } 787 788 int 789 puffs_access(void *v) 790 { 791 struct vop_access_args /* { 792 const struct vnodeop_desc *a_desc; 793 struct vnode *a_vp; 794 int a_mode; 795 kauth_cred_t a_cred; 796 } */ *ap = v; 797 PUFFS_MSG_VARS(vn, access); 798 struct vnode *vp = ap->a_vp; 799 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 800 int mode = ap->a_mode; 801 int error; 802 803 if (mode & VWRITE) { 804 switch (vp->v_type) { 805 case VDIR: 806 case VLNK: 807 case VREG: 808 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 809 || !EXISTSOP(pmp, WRITE)) 810 return EROFS; 811 break; 812 default: 813 break; 814 } 815 } 816 817 if (!EXISTSOP(pmp, ACCESS)) 818 return 0; 819 820 PUFFS_MSG_ALLOC(vn, access); 821 access_msg->pvnr_mode = ap->a_mode; 822 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 823 puffs_msg_setinfo(park_access, PUFFSOP_VN, 824 PUFFS_VN_ACCESS, VPTOPNC(vp)); 825 826 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 827 error = checkerr(pmp, error, __func__); 828 PUFFS_MSG_RELEASE(access); 829 830 return error; 831 } 832 833 int 834 puffs_getattr(void *v) 835 { 836 struct vop_getattr_args /* { 837 const struct vnodeop_desc *a_desc; 838 struct vnode *a_vp; 839 struct vattr *a_vap; 840 kauth_cred_t a_cred; 841 } */ *ap = v; 842 PUFFS_MSG_VARS(vn, getattr); 843 struct vnode *vp = ap->a_vp; 844 struct mount *mp = vp->v_mount; 845 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 846 struct vattr *vap, *rvap; 847 struct puffs_node *pn; 848 int error = 0; 849 850 vap = ap->a_vap; 851 852 PUFFS_MSG_ALLOC(vn, getattr); 853 vattr_null(&getattr_msg->pvnr_va); 854 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 855 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 856 PUFFS_VN_GETATTR, VPTOPNC(vp)); 857 858 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 859 error = checkerr(pmp, error, __func__); 860 if (error) 861 goto out; 862 863 rvap = &getattr_msg->pvnr_va; 864 /* 865 * Don't listen to the file server regarding special device 866 * size info, the file server doesn't know anything about them. 867 */ 868 if (vp->v_type == VBLK || vp->v_type == VCHR) 869 rvap->va_size = vp->v_size; 870 871 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 872 if (vp->v_type == VBLK) 873 rvap->va_blocksize = BLKDEV_IOSIZE; 874 else if (vp->v_type == VCHR) 875 rvap->va_blocksize = MAXBSIZE; 876 877 (void) memcpy(vap, rvap, sizeof(struct vattr)); 878 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 879 880 pn = VPTOPP(vp); 881 if (pn->pn_stat & PNODE_METACACHE_ATIME) 882 vap->va_atime = pn->pn_mc_atime; 883 if (pn->pn_stat & PNODE_METACACHE_CTIME) 884 vap->va_ctime = pn->pn_mc_ctime; 885 if (pn->pn_stat & PNODE_METACACHE_MTIME) 886 vap->va_mtime = pn->pn_mc_mtime; 887 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 888 vap->va_size = pn->pn_mc_size; 889 } else { 890 if (rvap->va_size != VNOVAL 891 && vp->v_type != VBLK && vp->v_type != VCHR) { 892 uvm_vnp_setsize(vp, rvap->va_size); 893 pn->pn_serversize = rvap->va_size; 894 } 895 } 896 897 out: 898 PUFFS_MSG_RELEASE(getattr); 899 return error; 900 } 901 902 static int 903 puffs_dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, 904 int chsize) 905 { 906 PUFFS_MSG_VARS(vn, setattr); 907 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 908 struct puffs_node *pn = vp->v_data; 909 int error; 910 911 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 912 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 913 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 914 || vap->va_mode != (mode_t)VNOVAL)) 915 return EROFS; 916 917 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 918 && vp->v_type == VREG && vap->va_size != VNOVAL) 919 return EROFS; 920 921 /* 922 * Flush metacache first. If we are called with some explicit 923 * parameters, treat them as information overriding metacache 924 * information. 925 */ 926 if (pn->pn_stat & PNODE_METACACHE_MASK) { 927 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 928 && vap->va_atime.tv_sec == VNOVAL) 929 vap->va_atime = pn->pn_mc_atime; 930 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 931 && vap->va_ctime.tv_sec == VNOVAL) 932 vap->va_ctime = pn->pn_mc_ctime; 933 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 934 && vap->va_mtime.tv_sec == VNOVAL) 935 vap->va_mtime = pn->pn_mc_mtime; 936 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 937 && vap->va_size == VNOVAL) 938 vap->va_size = pn->pn_mc_size; 939 940 pn->pn_stat &= ~PNODE_METACACHE_MASK; 941 } 942 943 PUFFS_MSG_ALLOC(vn, setattr); 944 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 945 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 946 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 947 PUFFS_VN_SETATTR, VPTOPNC(vp)); 948 949 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setattr, vp->v_data, NULL, error); 950 PUFFS_MSG_RELEASE(setattr); 951 error = checkerr(pmp, error, __func__); 952 if (error) 953 return error; 954 955 if (vap->va_size != VNOVAL) { 956 pn->pn_serversize = vap->va_size; 957 if (chsize) 958 uvm_vnp_setsize(vp, vap->va_size); 959 } 960 961 return 0; 962 } 963 964 int 965 puffs_setattr(void *v) 966 { 967 struct vop_getattr_args /* { 968 const struct vnodeop_desc *a_desc; 969 struct vnode *a_vp; 970 struct vattr *a_vap; 971 kauth_cred_t a_cred; 972 } */ *ap = v; 973 974 return puffs_dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, 1); 975 } 976 977 static __inline int 978 doinact(struct puffs_mount *pmp, int iaflag) 979 { 980 981 if (EXISTSOP(pmp, INACTIVE)) 982 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 983 if (iaflag || ALLOPS(pmp)) 984 return 1; 985 else 986 return 0; 987 else 988 return 1; 989 else 990 return 0; 991 } 992 993 static void 994 puffs_callinactive(struct puffs_mount *pmp, void *cookie, int iaflag) 995 { 996 int error; 997 PUFFS_MSG_VARS(vn, inactive); 998 999 if (doinact(pmp, iaflag)) { 1000 PUFFS_MSG_ALLOC(vn, inactive); 1001 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1002 PUFFS_VN_INACTIVE, cookie); 1003 1004 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 1005 PUFFS_MSG_RELEASE(inactive); 1006 } 1007 } 1008 1009 /* XXX: callinactive can't setback */ 1010 int 1011 puffs_inactive(void *v) 1012 { 1013 struct vop_inactive_args /* { 1014 const struct vnodeop_desc *a_desc; 1015 struct vnode *a_vp; 1016 } */ *ap = v; 1017 PUFFS_MSG_VARS(vn, inactive); 1018 struct vnode *vp = ap->a_vp; 1019 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1020 struct puffs_node *pnode; 1021 int error; 1022 1023 pnode = vp->v_data; 1024 1025 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1026 PUFFS_MSG_ALLOC(vn, inactive); 1027 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1028 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1029 1030 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1031 NULL, error); 1032 PUFFS_MSG_RELEASE(inactive); 1033 } 1034 pnode->pn_stat &= ~PNODE_DOINACT; 1035 1036 VOP_UNLOCK(vp, 0); 1037 1038 /* 1039 * file server thinks it's gone? then don't be afraid care, 1040 * node's life was already all it would ever be 1041 */ 1042 if (pnode->pn_stat & PNODE_NOREFS) { 1043 pnode->pn_stat |= PNODE_DYING; 1044 vrecycle(vp, NULL, curlwp); 1045 } 1046 1047 return 0; 1048 } 1049 1050 static void 1051 puffs_callreclaim(struct puffs_mount *pmp, void *cookie) 1052 { 1053 PUFFS_MSG_VARS(vn, reclaim); 1054 1055 if (!EXISTSOP(pmp, RECLAIM)) 1056 return; 1057 1058 PUFFS_MSG_ALLOC(vn, reclaim); 1059 puffs_msg_setfaf(park_reclaim); 1060 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, cookie); 1061 1062 puffs_msg_enqueue(pmp, park_reclaim); 1063 PUFFS_MSG_RELEASE(reclaim); 1064 } 1065 1066 /* 1067 * always FAF, we don't really care if the server wants to fail to 1068 * reclaim the node or not 1069 */ 1070 int 1071 puffs_reclaim(void *v) 1072 { 1073 struct vop_reclaim_args /* { 1074 const struct vnodeop_desc *a_desc; 1075 struct vnode *a_vp; 1076 } */ *ap = v; 1077 struct vnode *vp = ap->a_vp; 1078 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1079 1080 /* 1081 * first things first: check if someone is trying to reclaim the 1082 * root vnode. do not allow that to travel to userspace. 1083 * Note that we don't need to take the lock similarly to 1084 * puffs_root(), since there is only one of us. 1085 */ 1086 if (vp->v_vflag & VV_ROOT) { 1087 mutex_enter(&pmp->pmp_lock); 1088 KASSERT(pmp->pmp_root != NULL); 1089 pmp->pmp_root = NULL; 1090 mutex_exit(&pmp->pmp_lock); 1091 goto out; 1092 } 1093 1094 puffs_callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp)); 1095 1096 out: 1097 if (PUFFS_USE_NAMECACHE(pmp)) 1098 cache_purge(vp); 1099 puffs_putvnode(vp); 1100 1101 return 0; 1102 } 1103 1104 #define CSIZE sizeof(**ap->a_cookies) 1105 int 1106 puffs_readdir(void *v) 1107 { 1108 struct vop_readdir_args /* { 1109 const struct vnodeop_desc *a_desc; 1110 struct vnode *a_vp; 1111 struct uio *a_uio; 1112 kauth_cred_t a_cred; 1113 int *a_eofflag; 1114 off_t **a_cookies; 1115 int *a_ncookies; 1116 } */ *ap = v; 1117 PUFFS_MSG_VARS(vn, readdir); 1118 struct vnode *vp = ap->a_vp; 1119 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1120 size_t argsize, tomove, cookiemem, cookiesmax; 1121 struct uio *uio = ap->a_uio; 1122 size_t howmuch, resid; 1123 int error; 1124 1125 /* 1126 * ok, so we need: resid + cookiemem = maxreq 1127 * => resid + cookiesize * (resid/minsize) = maxreq 1128 * => resid + cookiesize/minsize * resid = maxreq 1129 * => (cookiesize/minsize + 1) * resid = maxreq 1130 * => resid = maxreq / (cookiesize/minsize + 1) 1131 * 1132 * Since cookiesize <= minsize and we're not very big on floats, 1133 * we approximate that to be 1. Therefore: 1134 * 1135 * resid = maxreq / 2; 1136 * 1137 * Well, at least we didn't have to use differential equations 1138 * or the Gram-Schmidt process. 1139 * 1140 * (yes, I'm very afraid of this) 1141 */ 1142 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1143 1144 if (ap->a_cookies) { 1145 KASSERT(ap->a_ncookies != NULL); 1146 if (pmp->pmp_args.pa_fhsize == 0) 1147 return EOPNOTSUPP; 1148 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1149 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1150 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1151 } else { 1152 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1153 cookiesmax = 0; 1154 cookiemem = 0; 1155 } 1156 1157 argsize = sizeof(struct puffs_vnmsg_readdir); 1158 tomove = resid + cookiemem; 1159 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1160 (void **)&readdir_msg, 1); 1161 1162 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1163 readdir_msg->pvnr_offset = uio->uio_offset; 1164 readdir_msg->pvnr_resid = resid; 1165 readdir_msg->pvnr_ncookies = cookiesmax; 1166 readdir_msg->pvnr_eofflag = 0; 1167 readdir_msg->pvnr_dentoff = cookiemem; 1168 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1169 PUFFS_VN_READDIR, VPTOPNC(vp)); 1170 puffs_msg_setdelta(park_readdir, tomove); 1171 1172 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1173 error = checkerr(pmp, error, __func__); 1174 if (error) 1175 goto out; 1176 1177 /* userspace is cheating? */ 1178 if (readdir_msg->pvnr_resid > resid) { 1179 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1180 "resid grew", VPTOPNC(vp)); 1181 ERROUT(EPROTO); 1182 } 1183 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1184 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1185 "too many cookies", VPTOPNC(vp)); 1186 ERROUT(EPROTO); 1187 } 1188 1189 /* check eof */ 1190 if (readdir_msg->pvnr_eofflag) 1191 *ap->a_eofflag = 1; 1192 1193 /* bouncy-wouncy with the directory data */ 1194 howmuch = resid - readdir_msg->pvnr_resid; 1195 1196 /* force eof if no data was returned (getcwd() needs this) */ 1197 if (howmuch == 0) { 1198 *ap->a_eofflag = 1; 1199 goto out; 1200 } 1201 1202 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1203 if (error) 1204 goto out; 1205 1206 /* provide cookies to caller if so desired */ 1207 if (ap->a_cookies) { 1208 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1209 M_TEMP, M_WAITOK); 1210 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1211 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1212 *ap->a_ncookies*CSIZE); 1213 } 1214 1215 /* next readdir starts here */ 1216 uio->uio_offset = readdir_msg->pvnr_offset; 1217 1218 out: 1219 puffs_msgmem_release(park_readdir); 1220 return error; 1221 } 1222 #undef CSIZE 1223 1224 /* 1225 * poll works by consuming the bitmask in pn_revents. If there are 1226 * events available, poll returns immediately. If not, it issues a 1227 * poll to userspace, selrecords itself and returns with no available 1228 * events. When the file server returns, it executes puffs_parkdone_poll(), 1229 * where available events are added to the bitmask. selnotify() is 1230 * then also executed by that function causing us to enter here again 1231 * and hopefully find the missing bits (unless someone got them first, 1232 * in which case it starts all over again). 1233 */ 1234 int 1235 puffs_poll(void *v) 1236 { 1237 struct vop_poll_args /* { 1238 const struct vnodeop_desc *a_desc; 1239 struct vnode *a_vp; 1240 int a_events; 1241 }*/ *ap = v; 1242 PUFFS_MSG_VARS(vn, poll); 1243 struct vnode *vp = ap->a_vp; 1244 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1245 struct puffs_node *pn = vp->v_data; 1246 int events, error; 1247 1248 if (EXISTSOP(pmp, POLL)) { 1249 mutex_enter(&pn->pn_mtx); 1250 events = pn->pn_revents & ap->a_events; 1251 if (events & ap->a_events) { 1252 pn->pn_revents &= ~ap->a_events; 1253 mutex_exit(&pn->pn_mtx); 1254 1255 return events; 1256 } else { 1257 puffs_referencenode(pn); 1258 mutex_exit(&pn->pn_mtx); 1259 1260 PUFFS_MSG_ALLOC(vn, poll); 1261 poll_msg->pvnr_events = ap->a_events; 1262 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1263 PUFFS_VN_POLL, VPTOPNC(vp)); 1264 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1265 selrecord(curlwp, &pn->pn_sel); 1266 1267 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1268 NULL, error); 1269 PUFFS_MSG_RELEASE(poll); 1270 1271 return 0; 1272 } 1273 } else { 1274 return genfs_poll(v); 1275 } 1276 } 1277 1278 int 1279 puffs_fsync(void *v) 1280 { 1281 struct vop_fsync_args /* { 1282 const struct vnodeop_desc *a_desc; 1283 struct vnode *a_vp; 1284 kauth_cred_t a_cred; 1285 int a_flags; 1286 off_t a_offlo; 1287 off_t a_offhi; 1288 } */ *ap = v; 1289 PUFFS_MSG_VARS(vn, fsync); 1290 struct vnode *vp = ap->a_vp; 1291 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1292 struct puffs_node *pn; 1293 struct vattr va; 1294 int pflags, error, dofaf; 1295 1296 pn = VPTOPP(vp); 1297 1298 /* flush out information from our metacache, see vop_setattr */ 1299 if (pn->pn_stat & PNODE_METACACHE_MASK 1300 && (pn->pn_stat & PNODE_DYING) == 0) { 1301 vattr_null(&va); 1302 error = VOP_SETATTR(vp, &va, FSCRED); 1303 if (error) 1304 return error; 1305 } 1306 1307 /* 1308 * flush pages to avoid being overly dirty 1309 */ 1310 pflags = PGO_CLEANIT; 1311 if (ap->a_flags & FSYNC_WAIT) 1312 pflags |= PGO_SYNCIO; 1313 simple_lock(&vp->v_interlock); 1314 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1315 round_page(ap->a_offhi), pflags); 1316 if (error) 1317 return error; 1318 1319 /* 1320 * HELLO! We exit already here if the user server does not 1321 * support fsync OR if we should call fsync for a node which 1322 * has references neither in the kernel or the fs server. 1323 * Otherwise we continue to issue fsync() forward. 1324 */ 1325 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1326 return 0; 1327 1328 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1329 /* 1330 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1331 * only FAFs for those. Otherwise there's a danger of deadlock, 1332 * since the execution context here might be the user server 1333 * doing some operation on another fs, which in turn caused a 1334 * vnode to be reclaimed from the freelist for this fs. 1335 */ 1336 if (dofaf == 0) { 1337 simple_lock(&vp->v_interlock); 1338 if (vp->v_iflag & VI_XLOCK) 1339 dofaf = 1; 1340 simple_unlock(&vp->v_interlock); 1341 } 1342 1343 PUFFS_MSG_ALLOC(vn, fsync); 1344 if (dofaf) 1345 puffs_msg_setfaf(park_fsync); 1346 1347 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1348 fsync_msg->pvnr_flags = ap->a_flags; 1349 fsync_msg->pvnr_offlo = ap->a_offlo; 1350 fsync_msg->pvnr_offhi = ap->a_offhi; 1351 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1352 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1353 1354 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1355 PUFFS_MSG_RELEASE(fsync); 1356 1357 error = checkerr(pmp, error, __func__); 1358 1359 return error; 1360 } 1361 1362 int 1363 puffs_seek(void *v) 1364 { 1365 struct vop_seek_args /* { 1366 const struct vnodeop_desc *a_desc; 1367 struct vnode *a_vp; 1368 off_t a_oldoff; 1369 off_t a_newoff; 1370 kauth_cred_t a_cred; 1371 } */ *ap = v; 1372 PUFFS_MSG_VARS(vn, seek); 1373 struct vnode *vp = ap->a_vp; 1374 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1375 int error; 1376 1377 PUFFS_MSG_ALLOC(vn, seek); 1378 seek_msg->pvnr_oldoff = ap->a_oldoff; 1379 seek_msg->pvnr_newoff = ap->a_newoff; 1380 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1381 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1382 PUFFS_VN_SEEK, VPTOPNC(vp)); 1383 1384 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1385 PUFFS_MSG_RELEASE(seek); 1386 return checkerr(pmp, error, __func__); 1387 } 1388 1389 static int 1390 puffs_callremove(struct puffs_mount *pmp, void *dcookie, void *cookie, 1391 struct componentname *cnp) 1392 { 1393 PUFFS_MSG_VARS(vn, remove); 1394 int error; 1395 1396 PUFFS_MSG_ALLOC(vn, remove); 1397 remove_msg->pvnr_cookie_targ = cookie; 1398 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1399 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1400 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dcookie); 1401 1402 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1403 PUFFS_MSG_RELEASE(remove); 1404 1405 return checkerr(pmp, error, __func__); 1406 } 1407 1408 /* 1409 * XXX: can't use callremove now because can't catch setbacks with 1410 * it due to lack of a pnode argument. 1411 */ 1412 int 1413 puffs_remove(void *v) 1414 { 1415 struct vop_remove_args /* { 1416 const struct vnodeop_desc *a_desc; 1417 struct vnode *a_dvp; 1418 struct vnode *a_vp; 1419 struct componentname *a_cnp; 1420 } */ *ap = v; 1421 PUFFS_MSG_VARS(vn, remove); 1422 struct vnode *dvp = ap->a_dvp; 1423 struct vnode *vp = ap->a_vp; 1424 struct puffs_node *dpn = VPTOPP(dvp); 1425 struct puffs_node *pn = VPTOPP(vp); 1426 struct componentname *cnp = ap->a_cnp; 1427 struct mount *mp = dvp->v_mount; 1428 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1429 int error; 1430 1431 PUFFS_MSG_ALLOC(vn, remove); 1432 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1433 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1434 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1435 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1436 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1437 1438 puffs_msg_enqueue(pmp, park_remove); 1439 REFPN_AND_UNLOCKVP(dvp, dpn); 1440 if (dvp == vp) 1441 REFPN(pn); 1442 else 1443 REFPN_AND_UNLOCKVP(vp, pn); 1444 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1445 1446 PUFFS_MSG_RELEASE(remove); 1447 1448 RELEPN_AND_VP(dvp, dpn); 1449 RELEPN_AND_VP(vp, pn); 1450 1451 error = checkerr(pmp, error, __func__); 1452 return error; 1453 } 1454 1455 int 1456 puffs_mkdir(void *v) 1457 { 1458 struct vop_mkdir_args /* { 1459 const struct vnodeop_desc *a_desc; 1460 struct vnode *a_dvp; 1461 struct vnode **a_vpp; 1462 struct componentname *a_cnp; 1463 struct vattr *a_vap; 1464 } */ *ap = v; 1465 PUFFS_MSG_VARS(vn, mkdir); 1466 struct vnode *dvp = ap->a_dvp; 1467 struct puffs_node *dpn = VPTOPP(dvp); 1468 struct componentname *cnp = ap->a_cnp; 1469 struct mount *mp = dvp->v_mount; 1470 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1471 int error; 1472 1473 PUFFS_MSG_ALLOC(vn, mkdir); 1474 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1475 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1476 mkdir_msg->pvnr_va = *ap->a_vap; 1477 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1478 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1479 1480 puffs_msg_enqueue(pmp, park_mkdir); 1481 REFPN_AND_UNLOCKVP(dvp, dpn); 1482 error = puffs_msg_wait2(pmp, park_mkdir, dpn, NULL); 1483 1484 error = checkerr(pmp, error, __func__); 1485 if (error) 1486 goto out; 1487 1488 error = puffs_newnode(mp, dvp, ap->a_vpp, 1489 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1490 if (error) 1491 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1492 mkdir_msg->pvnr_newnode, cnp); 1493 1494 out: 1495 PUFFS_MSG_RELEASE(mkdir); 1496 if (error || (cnp->cn_flags & SAVESTART) == 0) 1497 PNBUF_PUT(cnp->cn_pnbuf); 1498 RELEPN_AND_VP(dvp, dpn); 1499 return error; 1500 } 1501 1502 static int 1503 puffs_callrmdir(struct puffs_mount *pmp, void *dcookie, void *cookie, 1504 struct componentname *cnp) 1505 { 1506 PUFFS_MSG_VARS(vn, rmdir); 1507 int error; 1508 1509 PUFFS_MSG_ALLOC(vn, rmdir); 1510 rmdir_msg->pvnr_cookie_targ = cookie; 1511 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1512 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1513 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dcookie); 1514 1515 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1516 PUFFS_MSG_RELEASE(rmdir); 1517 1518 return checkerr(pmp, error, __func__); 1519 } 1520 1521 int 1522 puffs_rmdir(void *v) 1523 { 1524 struct vop_rmdir_args /* { 1525 const struct vnodeop_desc *a_desc; 1526 struct vnode *a_dvp; 1527 struct vnode *a_vp; 1528 struct componentname *a_cnp; 1529 } */ *ap = v; 1530 PUFFS_MSG_VARS(vn, rmdir); 1531 struct vnode *dvp = ap->a_dvp; 1532 struct vnode *vp = ap->a_vp; 1533 struct puffs_node *dpn = VPTOPP(dvp); 1534 struct puffs_node *pn = VPTOPP(vp); 1535 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1536 struct componentname *cnp = ap->a_cnp; 1537 int error; 1538 1539 PUFFS_MSG_ALLOC(vn, rmdir); 1540 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1541 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1542 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1543 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1544 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1545 1546 puffs_msg_enqueue(pmp, park_rmdir); 1547 REFPN_AND_UNLOCKVP(dvp, dpn); 1548 REFPN_AND_UNLOCKVP(vp, pn); 1549 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1550 1551 PUFFS_MSG_RELEASE(rmdir); 1552 1553 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1554 RELEPN_AND_VP(dvp, dpn); 1555 RELEPN_AND_VP(vp, pn); 1556 1557 return error; 1558 } 1559 1560 int 1561 puffs_link(void *v) 1562 { 1563 struct vop_link_args /* { 1564 const struct vnodeop_desc *a_desc; 1565 struct vnode *a_dvp; 1566 struct vnode *a_vp; 1567 struct componentname *a_cnp; 1568 }*/ *ap = v; 1569 PUFFS_MSG_VARS(vn, link); 1570 struct vnode *dvp = ap->a_dvp; 1571 struct vnode *vp = ap->a_vp; 1572 struct puffs_node *dpn = VPTOPP(dvp); 1573 struct puffs_node *pn = VPTOPP(vp); 1574 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1575 struct componentname *cnp = ap->a_cnp; 1576 int error; 1577 1578 PUFFS_MSG_ALLOC(vn, link); 1579 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1580 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1581 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1582 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1583 PUFFS_VN_LINK, VPTOPNC(dvp)); 1584 1585 puffs_msg_enqueue(pmp, park_link); 1586 REFPN_AND_UNLOCKVP(dvp, dpn); 1587 REFPN(pn); 1588 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1589 1590 PUFFS_MSG_RELEASE(link); 1591 1592 error = checkerr(pmp, error, __func__); 1593 1594 /* 1595 * XXX: stay in touch with the cache. I don't like this, but 1596 * don't have a better solution either. See also puffs_rename(). 1597 */ 1598 if (error == 0) 1599 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1600 1601 PNBUF_PUT(cnp->cn_pnbuf); 1602 RELEPN_AND_VP(dvp, dpn); 1603 puffs_releasenode(pn); 1604 1605 return error; 1606 } 1607 1608 int 1609 puffs_symlink(void *v) 1610 { 1611 struct vop_symlink_args /* { 1612 const struct vnodeop_desc *a_desc; 1613 struct vnode *a_dvp; 1614 struct vnode **a_vpp; 1615 struct componentname *a_cnp; 1616 struct vattr *a_vap; 1617 char *a_target; 1618 }*/ *ap = v; 1619 PUFFS_MSG_VARS(vn, symlink); 1620 struct vnode *dvp = ap->a_dvp; 1621 struct puffs_node *dpn = VPTOPP(dvp); 1622 struct mount *mp = dvp->v_mount; 1623 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1624 struct componentname *cnp = ap->a_cnp; 1625 int error; 1626 1627 *ap->a_vpp = NULL; 1628 1629 PUFFS_MSG_ALLOC(vn, symlink); 1630 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1631 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1632 symlink_msg->pvnr_va = *ap->a_vap; 1633 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1634 sizeof(symlink_msg->pvnr_link)); 1635 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1636 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1637 1638 puffs_msg_enqueue(pmp, park_symlink); 1639 REFPN_AND_UNLOCKVP(dvp, dpn); 1640 error = puffs_msg_wait2(pmp, park_symlink, dpn, NULL); 1641 1642 error = checkerr(pmp, error, __func__); 1643 if (error) 1644 goto out; 1645 1646 error = puffs_newnode(mp, dvp, ap->a_vpp, 1647 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 1648 if (error) 1649 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 1650 symlink_msg->pvnr_newnode, cnp); 1651 1652 out: 1653 PUFFS_MSG_RELEASE(symlink); 1654 if (error || (cnp->cn_flags & SAVESTART) == 0) 1655 PNBUF_PUT(cnp->cn_pnbuf); 1656 RELEPN_AND_VP(dvp, dpn); 1657 1658 return error; 1659 } 1660 1661 int 1662 puffs_readlink(void *v) 1663 { 1664 struct vop_readlink_args /* { 1665 const struct vnodeop_desc *a_desc; 1666 struct vnode *a_vp; 1667 struct uio *a_uio; 1668 kauth_cred_t a_cred; 1669 } */ *ap = v; 1670 PUFFS_MSG_VARS(vn, readlink); 1671 struct vnode *vp = ap->a_vp; 1672 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1673 size_t linklen; 1674 int error; 1675 1676 PUFFS_MSG_ALLOC(vn, readlink); 1677 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1678 linklen = sizeof(readlink_msg->pvnr_link); 1679 readlink_msg->pvnr_linklen = linklen; 1680 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1681 PUFFS_VN_READLINK, VPTOPNC(vp)); 1682 1683 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1684 error = checkerr(pmp, error, __func__); 1685 if (error) 1686 goto out; 1687 1688 /* bad bad user file server */ 1689 if (readlink_msg->pvnr_linklen > linklen) { 1690 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1691 "linklen too big", VPTOPNC(ap->a_vp)); 1692 error = EPROTO; 1693 goto out; 1694 } 1695 1696 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 1697 ap->a_uio); 1698 out: 1699 PUFFS_MSG_RELEASE(readlink); 1700 return error; 1701 } 1702 1703 int 1704 puffs_rename(void *v) 1705 { 1706 struct vop_rename_args /* { 1707 const struct vnodeop_desc *a_desc; 1708 struct vnode *a_fdvp; 1709 struct vnode *a_fvp; 1710 struct componentname *a_fcnp; 1711 struct vnode *a_tdvp; 1712 struct vnode *a_tvp; 1713 struct componentname *a_tcnp; 1714 }*/ *ap = v; 1715 PUFFS_MSG_VARS(vn, rename); 1716 struct vnode *fdvp = ap->a_fdvp; 1717 struct puffs_node *fpn = ap->a_fvp->v_data; 1718 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 1719 int error; 1720 1721 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) 1722 ERROUT(EXDEV); 1723 1724 PUFFS_MSG_ALLOC(vn, rename); 1725 rename_msg->pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1726 rename_msg->pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1727 if (ap->a_tvp) 1728 rename_msg->pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1729 else 1730 rename_msg->pvnr_cookie_targ = NULL; 1731 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 1732 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1733 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 1734 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1735 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 1736 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 1737 1738 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 1739 error = checkerr(pmp, error, __func__); 1740 1741 /* 1742 * XXX: stay in touch with the cache. I don't like this, but 1743 * don't have a better solution either. See also puffs_link(). 1744 */ 1745 if (error == 0) 1746 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 1747 1748 out: 1749 PUFFS_MSG_RELEASE(rename); 1750 if (ap->a_tvp != NULL) 1751 vput(ap->a_tvp); 1752 if (ap->a_tdvp == ap->a_tvp) 1753 vrele(ap->a_tdvp); 1754 else 1755 vput(ap->a_tdvp); 1756 1757 vrele(ap->a_fdvp); 1758 vrele(ap->a_fvp); 1759 1760 return error; 1761 } 1762 1763 #define RWARGS(cont, iofl, move, offset, creds) \ 1764 (cont)->pvnr_ioflag = (iofl); \ 1765 (cont)->pvnr_resid = (move); \ 1766 (cont)->pvnr_offset = (offset); \ 1767 puffs_credcvt(&(cont)->pvnr_cred, creds) 1768 1769 int 1770 puffs_read(void *v) 1771 { 1772 struct vop_read_args /* { 1773 const struct vnodeop_desc *a_desc; 1774 struct vnode *a_vp; 1775 struct uio *a_uio; 1776 int a_ioflag; 1777 kauth_cred_t a_cred; 1778 } */ *ap = v; 1779 PUFFS_MSG_VARS(vn, read); 1780 struct vnode *vp = ap->a_vp; 1781 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1782 struct uio *uio = ap->a_uio; 1783 void *win; 1784 size_t tomove, argsize; 1785 vsize_t bytelen; 1786 int error, ubcflags; 1787 1788 read_msg = NULL; 1789 error = 0; 1790 1791 /* std sanity */ 1792 if (uio->uio_resid == 0) 1793 return 0; 1794 if (uio->uio_offset < 0) 1795 return EINVAL; 1796 1797 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1798 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1799 1800 ubcflags = 0; 1801 if (UBC_WANT_UNMAP(vp)) 1802 ubcflags = UBC_UNMAP; 1803 1804 while (uio->uio_resid > 0) { 1805 bytelen = MIN(uio->uio_resid, 1806 vp->v_size - uio->uio_offset); 1807 if (bytelen == 0) 1808 break; 1809 1810 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1811 &bytelen, advice, UBC_READ); 1812 error = uiomove(win, bytelen, uio); 1813 ubc_release(win, ubcflags); 1814 if (error) 1815 break; 1816 } 1817 1818 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1819 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 1820 } else { 1821 /* 1822 * in case it's not a regular file or we're operating 1823 * uncached, do read in the old-fashioned style, 1824 * i.e. explicit read operations 1825 */ 1826 1827 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1828 argsize = sizeof(struct puffs_vnmsg_read); 1829 puffs_msgmem_alloc(argsize + tomove, &park_read, 1830 (void **)&read_msg, 1); 1831 1832 error = 0; 1833 while (uio->uio_resid > 0) { 1834 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1835 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 1836 RWARGS(read_msg, ap->a_ioflag, tomove, 1837 uio->uio_offset, ap->a_cred); 1838 puffs_msg_setinfo(park_read, PUFFSOP_VN, 1839 PUFFS_VN_READ, VPTOPNC(vp)); 1840 puffs_msg_setdelta(park_read, tomove); 1841 1842 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 1843 NULL, error); 1844 error = checkerr(pmp, error, __func__); 1845 if (error) 1846 break; 1847 1848 if (read_msg->pvnr_resid > tomove) { 1849 puffs_senderr(pmp, PUFFS_ERR_READ, 1850 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1851 error = EPROTO; 1852 break; 1853 } 1854 1855 error = uiomove(read_msg->pvnr_data, 1856 tomove - read_msg->pvnr_resid, uio); 1857 1858 /* 1859 * in case the file is out of juice, resid from 1860 * userspace is != 0. and the error-case is 1861 * quite obvious 1862 */ 1863 if (error || read_msg->pvnr_resid) 1864 break; 1865 } 1866 1867 puffs_msgmem_release(park_read); 1868 } 1869 1870 return error; 1871 } 1872 1873 /* 1874 * XXX: in case of a failure, this leaves uio in a bad state. 1875 * We could theoretically copy the uio and iovecs and "replay" 1876 * them the right amount after the userspace trip, but don't 1877 * bother for now. 1878 */ 1879 int 1880 puffs_write(void *v) 1881 { 1882 struct vop_write_args /* { 1883 const struct vnodeop_desc *a_desc; 1884 struct vnode *a_vp; 1885 struct uio *a_uio; 1886 int a_ioflag; 1887 kauth_cred_t a_cred; 1888 } */ *ap = v; 1889 PUFFS_MSG_VARS(vn, write); 1890 struct vnode *vp = ap->a_vp; 1891 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1892 struct uio *uio = ap->a_uio; 1893 size_t tomove, argsize; 1894 off_t oldoff, newoff, origoff; 1895 vsize_t bytelen; 1896 int error, uflags; 1897 int ubcflags; 1898 1899 error = uflags = 0; 1900 write_msg = NULL; 1901 1902 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1903 ubcflags = UBC_WRITE | UBC_PARTIALOK; 1904 if (UBC_WANT_UNMAP(vp)) 1905 ubcflags |= UBC_UNMAP; 1906 1907 /* 1908 * userspace *should* be allowed to control this, 1909 * but with UBC it's a bit unclear how to handle it 1910 */ 1911 if (ap->a_ioflag & IO_APPEND) 1912 uio->uio_offset = vp->v_size; 1913 1914 origoff = uio->uio_offset; 1915 while (uio->uio_resid > 0) { 1916 uflags |= PUFFS_UPDATECTIME; 1917 uflags |= PUFFS_UPDATEMTIME; 1918 oldoff = uio->uio_offset; 1919 bytelen = uio->uio_resid; 1920 1921 newoff = oldoff + bytelen; 1922 if (vp->v_size < newoff) { 1923 uvm_vnp_setwritesize(vp, newoff); 1924 } 1925 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1926 UVM_ADV_RANDOM, ubcflags); 1927 1928 /* 1929 * In case of a ubc_uiomove() error, 1930 * opt to not extend the file at all and 1931 * return an error. Otherwise, if we attempt 1932 * to clear the memory we couldn't fault to, 1933 * we might generate a kernel page fault. 1934 */ 1935 if (vp->v_size < newoff) { 1936 if (error == 0) { 1937 uflags |= PUFFS_UPDATESIZE; 1938 uvm_vnp_setsize(vp, newoff); 1939 } else { 1940 uvm_vnp_setwritesize(vp, vp->v_size); 1941 } 1942 } 1943 if (error) 1944 break; 1945 1946 /* 1947 * If we're writing large files, flush to file server 1948 * every 64k. Otherwise we can very easily exhaust 1949 * kernel and user memory, as the file server cannot 1950 * really keep up with our writing speed. 1951 * 1952 * Note: this does *NOT* honor MNT_ASYNC, because 1953 * that gives userland too much say in the kernel. 1954 */ 1955 if (oldoff >> 16 != uio->uio_offset >> 16) { 1956 simple_lock(&vp->v_interlock); 1957 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1958 uio->uio_offset & ~0xffff, 1959 PGO_CLEANIT | PGO_SYNCIO); 1960 if (error) 1961 break; 1962 } 1963 } 1964 1965 /* synchronous I/O? */ 1966 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1967 simple_lock(&vp->v_interlock); 1968 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1969 round_page(uio->uio_offset), 1970 PGO_CLEANIT | PGO_SYNCIO); 1971 1972 /* write through page cache? */ 1973 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1974 simple_lock(&vp->v_interlock); 1975 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1976 round_page(uio->uio_offset), PGO_CLEANIT); 1977 } 1978 1979 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 1980 } else { 1981 /* tomove is non-increasing */ 1982 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1983 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 1984 puffs_msgmem_alloc(argsize, &park_write, (void **)&write_msg,1); 1985 1986 while (uio->uio_resid > 0) { 1987 /* move data to buffer */ 1988 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1989 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 1990 RWARGS(write_msg, ap->a_ioflag, tomove, 1991 uio->uio_offset, ap->a_cred); 1992 error = uiomove(write_msg->pvnr_data, tomove, uio); 1993 if (error) 1994 break; 1995 1996 /* move buffer to userspace */ 1997 puffs_msg_setinfo(park_write, PUFFSOP_VN, 1998 PUFFS_VN_WRITE, VPTOPNC(vp)); 1999 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2000 NULL, error); 2001 error = checkerr(pmp, error, __func__); 2002 if (error) 2003 break; 2004 2005 if (write_msg->pvnr_resid > tomove) { 2006 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2007 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2008 error = EPROTO; 2009 break; 2010 } 2011 2012 /* adjust file size */ 2013 if (vp->v_size < uio->uio_offset) 2014 uvm_vnp_setsize(vp, uio->uio_offset); 2015 2016 /* didn't move everything? bad userspace. bail */ 2017 if (write_msg->pvnr_resid != 0) { 2018 error = EIO; 2019 break; 2020 } 2021 } 2022 puffs_msgmem_release(park_write); 2023 } 2024 2025 return error; 2026 } 2027 2028 int 2029 puffs_print(void *v) 2030 { 2031 struct vop_print_args /* { 2032 struct vnode *a_vp; 2033 } */ *ap = v; 2034 PUFFS_MSG_VARS(vn, print); 2035 struct vnode *vp = ap->a_vp; 2036 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2037 struct puffs_node *pn = vp->v_data; 2038 int error; 2039 2040 /* kernel portion */ 2041 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2042 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 2043 if (vp->v_type == VFIFO) 2044 fifo_printinfo(vp); 2045 lockmgr_printinfo(&vp->v_lock); 2046 2047 /* userspace portion */ 2048 if (EXISTSOP(pmp, PRINT)) { 2049 PUFFS_MSG_ALLOC(vn, print); 2050 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2051 PUFFS_VN_PRINT, VPTOPNC(vp)); 2052 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2053 NULL, error); 2054 PUFFS_MSG_RELEASE(print); 2055 } 2056 2057 return 0; 2058 } 2059 2060 int 2061 puffs_pathconf(void *v) 2062 { 2063 struct vop_pathconf_args /* { 2064 const struct vnodeop_desc *a_desc; 2065 struct vnode *a_vp; 2066 int a_name; 2067 register_t *a_retval; 2068 } */ *ap = v; 2069 PUFFS_MSG_VARS(vn, pathconf); 2070 struct vnode *vp = ap->a_vp; 2071 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2072 int error; 2073 2074 PUFFS_MSG_ALLOC(vn, pathconf); 2075 pathconf_msg->pvnr_name = ap->a_name; 2076 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2077 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2078 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2079 error = checkerr(pmp, error, __func__); 2080 if (!error) 2081 *ap->a_retval = pathconf_msg->pvnr_retval; 2082 PUFFS_MSG_RELEASE(pathconf); 2083 2084 return error; 2085 } 2086 2087 int 2088 puffs_advlock(void *v) 2089 { 2090 struct vop_advlock_args /* { 2091 const struct vnodeop_desc *a_desc; 2092 struct vnode *a_vp; 2093 void *a_id; 2094 int a_op; 2095 struct flock *a_fl; 2096 int a_flags; 2097 } */ *ap = v; 2098 PUFFS_MSG_VARS(vn, advlock); 2099 struct vnode *vp = ap->a_vp; 2100 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2101 int error; 2102 2103 PUFFS_MSG_ALLOC(vn, advlock); 2104 error = copyin(ap->a_fl, &advlock_msg->pvnr_fl, sizeof(struct flock)); 2105 if (error) 2106 goto out; 2107 advlock_msg->pvnr_id = ap->a_id; 2108 advlock_msg->pvnr_op = ap->a_op; 2109 advlock_msg->pvnr_flags = ap->a_flags; 2110 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2111 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2112 2113 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2114 error = checkerr(pmp, error, __func__); 2115 2116 out: 2117 PUFFS_MSG_RELEASE(advlock); 2118 return error; 2119 } 2120 2121 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2122 2123 /* 2124 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2125 */ 2126 int 2127 puffs_strategy(void *v) 2128 { 2129 struct vop_strategy_args /* { 2130 const struct vnodeop_desc *a_desc; 2131 struct vnode *a_vp; 2132 struct buf *a_bp; 2133 } */ *ap = v; 2134 PUFFS_MSG_VARS(vn, rw); 2135 struct vnode *vp = ap->a_vp; 2136 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2137 struct puffs_node *pn; 2138 struct buf *bp; 2139 size_t argsize; 2140 size_t tomove, moved; 2141 int error, dofaf, dobiodone; 2142 2143 pmp = MPTOPUFFSMP(vp->v_mount); 2144 bp = ap->a_bp; 2145 error = 0; 2146 dofaf = 0; 2147 pn = VPTOPP(vp); 2148 park_rw = NULL; /* explicit */ 2149 dobiodone = 1; 2150 2151 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2152 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2153 ERROUT(EOPNOTSUPP); 2154 2155 /* 2156 * Short-circuit optimization: don't flush buffer in between 2157 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2158 */ 2159 if (pn->pn_stat & PNODE_DYING) { 2160 KASSERT(BUF_ISWRITE(bp)); 2161 bp->b_resid = 0; 2162 goto out; 2163 } 2164 2165 #ifdef DIAGNOSTIC 2166 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2167 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2168 bp->b_bcount); 2169 #endif 2170 2171 /* 2172 * See explanation for the necessity of a FAF in puffs_fsync. 2173 * 2174 * Also, do FAF in case we're suspending. 2175 * See puffs_vfsops.c:pageflush() 2176 */ 2177 if (BUF_ISWRITE(bp)) { 2178 simple_lock(&vp->v_interlock); 2179 if (vp->v_iflag & VI_XLOCK) 2180 dofaf = 1; 2181 if (pn->pn_stat & PNODE_SUSPEND) 2182 dofaf = 1; 2183 simple_unlock(&vp->v_interlock); 2184 } 2185 2186 #ifdef DIAGNOSTIC 2187 if (curlwp == uvm.pagedaemon_lwp) 2188 KASSERT(dofaf || BIOASYNC(bp)); 2189 #endif 2190 2191 /* allocate transport structure */ 2192 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2193 argsize = sizeof(struct puffs_vnmsg_rw); 2194 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2195 (void **)&rw_msg, dofaf ? 0 : 1); 2196 if (error) 2197 goto out; 2198 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2199 2200 /* 2x2 cases: read/write, faf/nofaf */ 2201 if (BUF_ISREAD(bp)) { 2202 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2203 PUFFS_VN_READ, VPTOPNC(vp)); 2204 puffs_msg_setdelta(park_rw, tomove); 2205 if (BIOASYNC(bp)) { 2206 puffs_msg_setcall(park_rw, 2207 puffs_parkdone_asyncbioread, bp); 2208 puffs_msg_enqueue(pmp, park_rw); 2209 dobiodone = 0; 2210 } else { 2211 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2212 NULL, error); 2213 error = checkerr(pmp, error, __func__); 2214 if (error) 2215 goto out; 2216 2217 if (rw_msg->pvnr_resid > tomove) { 2218 puffs_senderr(pmp, PUFFS_ERR_READ, 2219 E2BIG, "resid grew", VPTOPNC(vp)); 2220 ERROUT(EPROTO); 2221 } 2222 2223 moved = tomove - rw_msg->pvnr_resid; 2224 2225 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2226 bp->b_resid = bp->b_bcount - moved; 2227 } 2228 } else { 2229 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2230 PUFFS_VN_WRITE, VPTOPNC(vp)); 2231 /* 2232 * make pages read-only before we write them if we want 2233 * write caching info 2234 */ 2235 if (PUFFS_WCACHEINFO(pmp)) { 2236 struct uvm_object *uobj = &vp->v_uobj; 2237 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2238 struct vm_page *vmp; 2239 int i; 2240 2241 for (i = 0; i < npages; i++) { 2242 vmp= uvm_pageratop((vaddr_t)bp->b_data 2243 + (i << PAGE_SHIFT)); 2244 DPRINTF(("puffs_strategy: write-protecting " 2245 "vp %p page %p, offset %" PRId64"\n", 2246 vp, vmp, vmp->offset)); 2247 simple_lock(&uobj->vmobjlock); 2248 vmp->flags |= PG_RDONLY; 2249 pmap_page_protect(vmp, VM_PROT_READ); 2250 simple_unlock(&uobj->vmobjlock); 2251 } 2252 } 2253 2254 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2255 if (dofaf) { 2256 puffs_msg_setfaf(park_rw); 2257 } else if (BIOASYNC(bp)) { 2258 puffs_msg_setcall(park_rw, 2259 puffs_parkdone_asyncbiowrite, bp); 2260 dobiodone = 0; 2261 } 2262 2263 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2264 2265 if (dobiodone == 0) 2266 goto out; 2267 2268 /* 2269 * XXXXXXXX: wrong, but kernel can't survive strategy 2270 * failure currently. Here, have one more X: X. 2271 */ 2272 if (error != ENOMEM) 2273 error = 0; 2274 2275 error = checkerr(pmp, error, __func__); 2276 if (error) 2277 goto out; 2278 2279 if (rw_msg->pvnr_resid > tomove) { 2280 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2281 E2BIG, "resid grew", VPTOPNC(vp)); 2282 ERROUT(EPROTO); 2283 } 2284 2285 /* 2286 * FAF moved everything. Frankly, we don't 2287 * really have a choice. 2288 */ 2289 if (dofaf && error == 0) 2290 moved = tomove; 2291 else 2292 moved = tomove - rw_msg->pvnr_resid; 2293 2294 bp->b_resid = bp->b_bcount - moved; 2295 if (bp->b_resid != 0) { 2296 ERROUT(EIO); 2297 } 2298 } 2299 2300 out: 2301 if (park_rw) 2302 puffs_msgmem_release(park_rw); 2303 2304 if (error) 2305 bp->b_error = error; 2306 2307 if (error || dobiodone) 2308 biodone(bp); 2309 2310 return error; 2311 } 2312 2313 int 2314 puffs_mmap(void *v) 2315 { 2316 struct vop_mmap_args /* { 2317 const struct vnodeop_desc *a_desc; 2318 struct vnode *a_vp; 2319 vm_prot_t a_prot; 2320 kauth_cred_t a_cred; 2321 } */ *ap = v; 2322 PUFFS_MSG_VARS(vn, mmap); 2323 struct vnode *vp = ap->a_vp; 2324 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2325 int error; 2326 2327 if (!PUFFS_USE_PAGECACHE(pmp)) 2328 return genfs_eopnotsupp(v); 2329 2330 if (EXISTSOP(pmp, MMAP)) { 2331 PUFFS_MSG_ALLOC(vn, mmap); 2332 mmap_msg->pvnr_prot = ap->a_prot; 2333 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2334 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2335 PUFFS_VN_MMAP, VPTOPNC(vp)); 2336 2337 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2338 error = checkerr(pmp, error, __func__); 2339 PUFFS_MSG_RELEASE(mmap); 2340 } else { 2341 error = genfs_mmap(v); 2342 } 2343 2344 return error; 2345 } 2346 2347 2348 /* 2349 * The rest don't get a free trip to userspace and back, they 2350 * have to stay within the kernel. 2351 */ 2352 2353 /* 2354 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2355 * well, maybe somehow, somewhere, some day .... 2356 */ 2357 int 2358 puffs_bmap(void *v) 2359 { 2360 struct vop_bmap_args /* { 2361 const struct vnodeop_desc *a_desc; 2362 struct vnode *a_vp; 2363 daddr_t a_bn; 2364 struct vnode **a_vpp; 2365 daddr_t *a_bnp; 2366 int *a_runp; 2367 } */ *ap = v; 2368 struct puffs_mount *pmp; 2369 2370 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2371 2372 if (ap->a_vpp) 2373 *ap->a_vpp = ap->a_vp; 2374 if (ap->a_bnp) 2375 *ap->a_bnp = ap->a_bn; 2376 if (ap->a_runp) 2377 *ap->a_runp 2378 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2379 2380 return 0; 2381 } 2382 2383 /* 2384 * Handle getpages faults in puffs. We let genfs_getpages() do most 2385 * of the dirty work, but we come in this route to do accounting tasks. 2386 * If the user server has specified functions for cache notifications 2387 * about reads and/or writes, we record which type of operation we got, 2388 * for which page range, and proceed to issue a FAF notification to the 2389 * server about it. 2390 */ 2391 int 2392 puffs_getpages(void *v) 2393 { 2394 struct vop_getpages_args /* { 2395 const struct vnodeop_desc *a_desc; 2396 struct vnode *a_vp; 2397 voff_t a_offset; 2398 struct vm_page **a_m; 2399 int *a_count; 2400 int a_centeridx; 2401 vm_prot_t a_access_type; 2402 int a_advice; 2403 int a_flags; 2404 } */ *ap = v; 2405 struct puffs_mount *pmp; 2406 struct puffs_node *pn; 2407 struct vnode *vp; 2408 struct vm_page **pgs; 2409 struct puffs_cacheinfo *pcinfo = NULL; 2410 struct puffs_cacherun *pcrun; 2411 void *parkmem = NULL; 2412 size_t runsizes; 2413 int i, npages, si, streakon; 2414 int error, locked, write; 2415 2416 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2417 npages = *ap->a_count; 2418 pgs = ap->a_m; 2419 vp = ap->a_vp; 2420 pn = vp->v_data; 2421 locked = (ap->a_flags & PGO_LOCKED) != 0; 2422 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2423 2424 /* ccg xnaht - gets Wuninitialized wrong */ 2425 pcrun = NULL; 2426 runsizes = 0; 2427 2428 /* 2429 * Check that we aren't trying to fault in pages which our file 2430 * server doesn't know about. This happens if we extend a file by 2431 * skipping some pages and later try to fault in pages which 2432 * are between pn_serversize and vp_size. This check optimizes 2433 * away the common case where a file is being extended. 2434 */ 2435 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2436 struct vattr va; 2437 2438 /* try again later when we can block */ 2439 if (locked) 2440 ERROUT(EBUSY); 2441 2442 simple_unlock(&vp->v_interlock); 2443 vattr_null(&va); 2444 va.va_size = vp->v_size; 2445 error = puffs_dosetattr(vp, &va, FSCRED, 0); 2446 if (error) 2447 ERROUT(error); 2448 simple_lock(&vp->v_interlock); 2449 } 2450 2451 if (write && PUFFS_WCACHEINFO(pmp)) { 2452 #ifdef notnowjohn 2453 /* allocate worst-case memory */ 2454 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2455 pcinfo = kmem_zalloc(sizeof_puffs_cacheinfo) + runsize, 2456 locked ? KM_NOSLEEP : KM_SLEEP); 2457 2458 /* 2459 * can't block if we're locked and can't mess up caching 2460 * information for fs server. so come back later, please 2461 */ 2462 if (pcinfo == NULL) 2463 ERROUT(ENOMEM); 2464 2465 parkmem = puffs_park_alloc(locked == 0); 2466 if (parkmem == NULL) 2467 ERROUT(ENOMEM); 2468 2469 pcrun = pcinfo->pcache_runs; 2470 #else 2471 (void)parkmem; 2472 #endif 2473 } 2474 2475 error = genfs_getpages(v); 2476 if (error) 2477 goto out; 2478 2479 if (PUFFS_WCACHEINFO(pmp) == 0) 2480 goto out; 2481 2482 /* 2483 * Let's see whose fault it was and inform the user server of 2484 * possibly read/written pages. Map pages from read faults 2485 * strictly read-only, since otherwise we might miss info on 2486 * when the page is actually write-faulted to. 2487 */ 2488 if (!locked) 2489 simple_lock(&vp->v_uobj.vmobjlock); 2490 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2491 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2492 if (streakon && write) { 2493 streakon = 0; 2494 pcrun[si].pcache_runend 2495 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2496 si++; 2497 } 2498 continue; 2499 } 2500 if (streakon == 0 && write) { 2501 streakon = 1; 2502 pcrun[si].pcache_runstart = pgs[i]->offset; 2503 } 2504 2505 if (!write) 2506 pgs[i]->flags |= PG_RDONLY; 2507 } 2508 /* was the last page part of our streak? */ 2509 if (streakon) { 2510 pcrun[si].pcache_runend 2511 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2512 si++; 2513 } 2514 if (!locked) 2515 simple_unlock(&vp->v_uobj.vmobjlock); 2516 2517 KASSERT(si <= (npages / 2) + 1); 2518 2519 #ifdef notnowjohn 2520 /* send results to userspace */ 2521 if (write) 2522 puffs_cacheop(pmp, parkmem, pcinfo, 2523 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2524 #endif 2525 2526 out: 2527 if (error) { 2528 if (pcinfo != NULL) 2529 kmem_free(pcinfo, 2530 sizeof(struct puffs_cacheinfo) + runsizes); 2531 #ifdef notnowjohn 2532 if (parkmem != NULL) 2533 puffs_park_release(parkmem, 1); 2534 #endif 2535 } 2536 2537 return error; 2538 } 2539 2540 int 2541 puffs_lock(void *v) 2542 { 2543 struct vop_lock_args /* { 2544 struct vnode *a_vp; 2545 int a_flags; 2546 }*/ *ap = v; 2547 struct vnode *vp = ap->a_vp; 2548 struct mount *mp = vp->v_mount; 2549 2550 #if 0 2551 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2552 #endif 2553 2554 /* 2555 * XXX: this avoids deadlocking when we're suspending. 2556 * e.g. some ops holding the vnode lock might be blocked for 2557 * the vfs transaction lock so we'd deadlock. 2558 * 2559 * Now once again this is skating on the thin ice of modern life, 2560 * since we are breaking the consistency guarantee provided 2561 * _to the user server_ by vnode locking. Hopefully this will 2562 * get fixed soon enough by getting rid of the dependency on 2563 * vnode locks alltogether. 2564 */ 2565 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2566 if (ap->a_flags & LK_INTERLOCK) 2567 simple_unlock(&vp->v_interlock); 2568 return 0; 2569 } 2570 2571 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2572 } 2573 2574 int 2575 puffs_unlock(void *v) 2576 { 2577 struct vop_unlock_args /* { 2578 struct vnode *a_vp; 2579 int a_flags; 2580 } */ *ap = v; 2581 struct vnode *vp = ap->a_vp; 2582 struct mount *mp = vp->v_mount; 2583 2584 #if 0 2585 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2586 #endif 2587 2588 /* XXX: see puffs_lock() */ 2589 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2590 if (ap->a_flags & LK_INTERLOCK) 2591 simple_unlock(&vp->v_interlock); 2592 return 0; 2593 } 2594 2595 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2596 } 2597 2598 int 2599 puffs_islocked(void *v) 2600 { 2601 struct vop_islocked_args *ap = v; 2602 int rv; 2603 2604 rv = lockstatus(&ap->a_vp->v_lock); 2605 return rv; 2606 } 2607 2608 int 2609 puffs_generic(void *v) 2610 { 2611 struct vop_generic_args *ap = v; 2612 2613 (void)ap; 2614 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2615 2616 return EOPNOTSUPP; 2617 } 2618 2619 2620 /* 2621 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2622 * FAF update information for the puffs node first. 2623 */ 2624 int 2625 puffs_spec_read(void *v) 2626 { 2627 struct vop_read_args /* { 2628 const struct vnodeop_desc *a_desc; 2629 struct vnode *a_vp; 2630 struct uio *a_uio; 2631 int a_ioflag; 2632 kauth_cred_t a_cred; 2633 } */ *ap = v; 2634 2635 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2636 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2637 } 2638 2639 int 2640 puffs_spec_write(void *v) 2641 { 2642 struct vop_write_args /* { 2643 const struct vnodeop_desc *a_desc; 2644 struct vnode *a_vp; 2645 struct uio *a_uio; 2646 int a_ioflag; 2647 kauth_cred_t a_cred; 2648 }*/ *ap = v; 2649 2650 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2651 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2652 } 2653 2654 int 2655 puffs_fifo_read(void *v) 2656 { 2657 struct vop_read_args /* { 2658 const struct vnodeop_desc *a_desc; 2659 struct vnode *a_vp; 2660 struct uio *a_uio; 2661 int a_ioflag; 2662 kauth_cred_t a_cred; 2663 } */ *ap = v; 2664 2665 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2666 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2667 } 2668 2669 int 2670 puffs_fifo_write(void *v) 2671 { 2672 struct vop_write_args /* { 2673 const struct vnodeop_desc *a_desc; 2674 struct vnode *a_vp; 2675 struct uio *a_uio; 2676 int a_ioflag; 2677 kauth_cred_t a_cred; 2678 }*/ *ap = v; 2679 2680 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2681 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2682 } 2683
Indexes created Tue Sep 30 20:09:53 GMT 2025