puffs_vnops.c revision 1.116
1 /* $NetBSD: puffs_vnops.c,v 1.116 2007/11/17 21:30:48 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 1.116 2007/11/17 21:30:48 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 /* 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 &lookup_msg->pvnr_cn_cid, 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 &create_msg->pvnr_cn_cid, 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 &mknod_msg->pvnr_cn_cid, 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 struct lwp *a_l; 734 } */ *ap = v; 735 PUFFS_MSG_VARS(vn, open); 736 struct vnode *vp = ap->a_vp; 737 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 738 int mode = ap->a_mode; 739 int error; 740 741 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 742 743 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 744 ERROUT(EROFS); 745 746 if (!EXISTSOP(pmp, OPEN)) 747 ERROUT(0); 748 749 PUFFS_MSG_ALLOC(vn, open); 750 open_msg->pvnr_mode = mode; 751 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 752 puffs_cidcvt(&open_msg->pvnr_cid, ap->a_l); 753 puffs_msg_setinfo(park_open, PUFFSOP_VN, 754 PUFFS_VN_OPEN, VPTOPNC(vp)); 755 756 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 757 error = checkerr(pmp, error, __func__); 758 759 out: 760 DPRINTF(("puffs_open: returning %d\n", error)); 761 PUFFS_MSG_RELEASE(open); 762 return error; 763 } 764 765 int 766 puffs_close(void *v) 767 { 768 struct vop_close_args /* { 769 const struct vnodeop_desc *a_desc; 770 struct vnode *a_vp; 771 int a_fflag; 772 kauth_cred_t a_cred; 773 struct lwp *a_l; 774 } */ *ap = v; 775 PUFFS_MSG_VARS(vn, close); 776 struct vnode *vp = ap->a_vp; 777 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 778 779 PUFFS_MSG_ALLOC(vn, close); 780 puffs_msg_setfaf(park_close); 781 close_msg->pvnr_fflag = ap->a_fflag; 782 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 783 puffs_cidcvt(&close_msg->pvnr_cid, ap->a_l); 784 puffs_msg_setinfo(park_close, PUFFSOP_VN, 785 PUFFS_VN_CLOSE, VPTOPNC(vp)); 786 787 puffs_msg_enqueue(pmp, park_close); 788 PUFFS_MSG_RELEASE(close); 789 return 0; 790 } 791 792 int 793 puffs_access(void *v) 794 { 795 struct vop_access_args /* { 796 const struct vnodeop_desc *a_desc; 797 struct vnode *a_vp; 798 int a_mode; 799 kauth_cred_t a_cred; 800 struct lwp *a_l; 801 } */ *ap = v; 802 PUFFS_MSG_VARS(vn, access); 803 struct vnode *vp = ap->a_vp; 804 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 805 int mode = ap->a_mode; 806 int error; 807 808 if (mode & VWRITE) { 809 switch (vp->v_type) { 810 case VDIR: 811 case VLNK: 812 case VREG: 813 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 814 || !EXISTSOP(pmp, WRITE)) 815 return EROFS; 816 break; 817 default: 818 break; 819 } 820 } 821 822 if (!EXISTSOP(pmp, ACCESS)) 823 return 0; 824 825 PUFFS_MSG_ALLOC(vn, access); 826 access_msg->pvnr_mode = ap->a_mode; 827 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 828 puffs_cidcvt(&access_msg->pvnr_cid, ap->a_l); 829 puffs_msg_setinfo(park_access, PUFFSOP_VN, 830 PUFFS_VN_ACCESS, VPTOPNC(vp)); 831 832 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 833 error = checkerr(pmp, error, __func__); 834 PUFFS_MSG_RELEASE(access); 835 836 return error; 837 } 838 839 int 840 puffs_getattr(void *v) 841 { 842 struct vop_getattr_args /* { 843 const struct vnodeop_desc *a_desc; 844 struct vnode *a_vp; 845 struct vattr *a_vap; 846 kauth_cred_t a_cred; 847 struct lwp *a_l; 848 } */ *ap = v; 849 PUFFS_MSG_VARS(vn, getattr); 850 struct vnode *vp = ap->a_vp; 851 struct mount *mp = vp->v_mount; 852 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 853 struct vattr *vap, *rvap; 854 struct puffs_node *pn; 855 int error = 0; 856 857 vap = ap->a_vap; 858 859 PUFFS_MSG_ALLOC(vn, getattr); 860 vattr_null(&getattr_msg->pvnr_va); 861 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 862 puffs_cidcvt(&getattr_msg->pvnr_cid, ap->a_l); 863 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 864 PUFFS_VN_GETATTR, VPTOPNC(vp)); 865 866 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 867 error = checkerr(pmp, error, __func__); 868 if (error) 869 goto out; 870 871 rvap = &getattr_msg->pvnr_va; 872 /* 873 * Don't listen to the file server regarding special device 874 * size info, the file server doesn't know anything about them. 875 */ 876 if (vp->v_type == VBLK || vp->v_type == VCHR) 877 rvap->va_size = vp->v_size; 878 879 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 880 if (vp->v_type == VBLK) 881 rvap->va_blocksize = BLKDEV_IOSIZE; 882 else if (vp->v_type == VCHR) 883 rvap->va_blocksize = MAXBSIZE; 884 885 (void) memcpy(vap, rvap, sizeof(struct vattr)); 886 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 887 888 pn = VPTOPP(vp); 889 if (pn->pn_stat & PNODE_METACACHE_ATIME) 890 vap->va_atime = pn->pn_mc_atime; 891 if (pn->pn_stat & PNODE_METACACHE_CTIME) 892 vap->va_ctime = pn->pn_mc_ctime; 893 if (pn->pn_stat & PNODE_METACACHE_MTIME) 894 vap->va_mtime = pn->pn_mc_mtime; 895 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 896 vap->va_size = pn->pn_mc_size; 897 } else { 898 if (rvap->va_size != VNOVAL 899 && vp->v_type != VBLK && vp->v_type != VCHR) { 900 uvm_vnp_setsize(vp, rvap->va_size); 901 pn->pn_serversize = rvap->va_size; 902 } 903 } 904 905 out: 906 PUFFS_MSG_RELEASE(getattr); 907 return error; 908 } 909 910 static int 911 puffs_dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, 912 struct lwp *l, int chsize) 913 { 914 PUFFS_MSG_VARS(vn, setattr); 915 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 916 struct puffs_node *pn = vp->v_data; 917 int error; 918 919 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 920 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 921 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 922 || vap->va_mode != (mode_t)VNOVAL)) 923 return EROFS; 924 925 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 926 && vp->v_type == VREG && vap->va_size != VNOVAL) 927 return EROFS; 928 929 /* 930 * Flush metacache first. If we are called with some explicit 931 * parameters, treat them as information overriding metacache 932 * information. 933 */ 934 if (pn->pn_stat & PNODE_METACACHE_MASK) { 935 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 936 && vap->va_atime.tv_sec == VNOVAL) 937 vap->va_atime = pn->pn_mc_atime; 938 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 939 && vap->va_ctime.tv_sec == VNOVAL) 940 vap->va_ctime = pn->pn_mc_ctime; 941 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 942 && vap->va_mtime.tv_sec == VNOVAL) 943 vap->va_mtime = pn->pn_mc_mtime; 944 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 945 && vap->va_size == VNOVAL) 946 vap->va_size = pn->pn_mc_size; 947 948 pn->pn_stat &= ~PNODE_METACACHE_MASK; 949 } 950 951 PUFFS_MSG_ALLOC(vn, setattr); 952 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 953 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 954 puffs_cidcvt(&setattr_msg->pvnr_cid, l); 955 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 956 PUFFS_VN_SETATTR, VPTOPNC(vp)); 957 958 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setattr, vp->v_data, NULL, error); 959 PUFFS_MSG_RELEASE(setattr); 960 error = checkerr(pmp, error, __func__); 961 if (error) 962 return error; 963 964 if (vap->va_size != VNOVAL) { 965 pn->pn_serversize = vap->va_size; 966 if (chsize) 967 uvm_vnp_setsize(vp, vap->va_size); 968 } 969 970 return 0; 971 } 972 973 int 974 puffs_setattr(void *v) 975 { 976 struct vop_getattr_args /* { 977 const struct vnodeop_desc *a_desc; 978 struct vnode *a_vp; 979 struct vattr *a_vap; 980 kauth_cred_t a_cred; 981 struct lwp *a_l; 982 } */ *ap = v; 983 984 return puffs_dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, ap->a_l, 1); 985 } 986 987 static __inline int 988 doinact(struct puffs_mount *pmp, int iaflag) 989 { 990 991 if (EXISTSOP(pmp, INACTIVE)) 992 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 993 if (iaflag || ALLOPS(pmp)) 994 return 1; 995 else 996 return 0; 997 else 998 return 1; 999 else 1000 return 0; 1001 } 1002 1003 static void 1004 puffs_callinactive(struct puffs_mount *pmp, void *cookie, int iaflag, 1005 struct lwp *l) 1006 { 1007 int error; 1008 PUFFS_MSG_VARS(vn, inactive); 1009 1010 if (doinact(pmp, iaflag)) { 1011 PUFFS_MSG_ALLOC(vn, inactive); 1012 puffs_cidcvt(&inactive_msg->pvnr_cid, l); 1013 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1014 PUFFS_VN_INACTIVE, cookie); 1015 1016 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 1017 PUFFS_MSG_RELEASE(inactive); 1018 } 1019 } 1020 1021 /* XXX: callinactive can't setback */ 1022 int 1023 puffs_inactive(void *v) 1024 { 1025 struct vop_inactive_args /* { 1026 const struct vnodeop_desc *a_desc; 1027 struct vnode *a_vp; 1028 struct lwp *a_l; 1029 } */ *ap = v; 1030 PUFFS_MSG_VARS(vn, inactive); 1031 struct vnode *vp = ap->a_vp; 1032 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1033 struct puffs_node *pnode; 1034 int error; 1035 1036 pnode = vp->v_data; 1037 1038 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1039 PUFFS_MSG_ALLOC(vn, inactive); 1040 puffs_cidcvt(&inactive_msg->pvnr_cid, ap->a_l); 1041 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1042 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1043 1044 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1045 NULL, error); 1046 PUFFS_MSG_RELEASE(inactive); 1047 } 1048 pnode->pn_stat &= ~PNODE_DOINACT; 1049 1050 VOP_UNLOCK(vp, 0); 1051 1052 /* 1053 * file server thinks it's gone? then don't be afraid care, 1054 * node's life was already all it would ever be 1055 */ 1056 if (pnode->pn_stat & PNODE_NOREFS) { 1057 pnode->pn_stat |= PNODE_DYING; 1058 vrecycle(vp, NULL, ap->a_l); 1059 } 1060 1061 return 0; 1062 } 1063 1064 static void 1065 puffs_callreclaim(struct puffs_mount *pmp, void *cookie, struct lwp *l) 1066 { 1067 PUFFS_MSG_VARS(vn, reclaim); 1068 1069 if (!EXISTSOP(pmp, RECLAIM)) 1070 return; 1071 1072 PUFFS_MSG_ALLOC(vn, reclaim); 1073 puffs_msg_setfaf(park_reclaim); 1074 puffs_cidcvt(&reclaim_msg->pvnr_cid, l); 1075 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, cookie); 1076 1077 puffs_msg_enqueue(pmp, park_reclaim); 1078 PUFFS_MSG_RELEASE(reclaim); 1079 } 1080 1081 /* 1082 * always FAF, we don't really care if the server wants to fail to 1083 * reclaim the node or not 1084 */ 1085 int 1086 puffs_reclaim(void *v) 1087 { 1088 struct vop_reclaim_args /* { 1089 const struct vnodeop_desc *a_desc; 1090 struct vnode *a_vp; 1091 struct lwp *a_l; 1092 } */ *ap = v; 1093 struct vnode *vp = ap->a_vp; 1094 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1095 1096 /* 1097 * first things first: check if someone is trying to reclaim the 1098 * root vnode. do not allow that to travel to userspace. 1099 * Note that we don't need to take the lock similarly to 1100 * puffs_root(), since there is only one of us. 1101 */ 1102 if (vp->v_vflag & VV_ROOT) { 1103 mutex_enter(&pmp->pmp_lock); 1104 KASSERT(pmp->pmp_root != NULL); 1105 pmp->pmp_root = NULL; 1106 mutex_exit(&pmp->pmp_lock); 1107 goto out; 1108 } 1109 1110 puffs_callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp), ap->a_l); 1111 1112 out: 1113 if (PUFFS_USE_NAMECACHE(pmp)) 1114 cache_purge(vp); 1115 puffs_putvnode(vp); 1116 1117 return 0; 1118 } 1119 1120 #define CSIZE sizeof(**ap->a_cookies) 1121 int 1122 puffs_readdir(void *v) 1123 { 1124 struct vop_readdir_args /* { 1125 const struct vnodeop_desc *a_desc; 1126 struct vnode *a_vp; 1127 struct uio *a_uio; 1128 kauth_cred_t a_cred; 1129 int *a_eofflag; 1130 off_t **a_cookies; 1131 int *a_ncookies; 1132 } */ *ap = v; 1133 PUFFS_MSG_VARS(vn, readdir); 1134 struct vnode *vp = ap->a_vp; 1135 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1136 size_t argsize, tomove, cookiemem, cookiesmax; 1137 struct uio *uio = ap->a_uio; 1138 size_t howmuch, resid; 1139 int error; 1140 1141 /* 1142 * ok, so we need: resid + cookiemem = maxreq 1143 * => resid + cookiesize * (resid/minsize) = maxreq 1144 * => resid + cookiesize/minsize * resid = maxreq 1145 * => (cookiesize/minsize + 1) * resid = maxreq 1146 * => resid = maxreq / (cookiesize/minsize + 1) 1147 * 1148 * Since cookiesize <= minsize and we're not very big on floats, 1149 * we approximate that to be 1. Therefore: 1150 * 1151 * resid = maxreq / 2; 1152 * 1153 * Well, at least we didn't have to use differential equations 1154 * or the Gram-Schmidt process. 1155 * 1156 * (yes, I'm very afraid of this) 1157 */ 1158 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1159 1160 if (ap->a_cookies) { 1161 KASSERT(ap->a_ncookies != NULL); 1162 if (pmp->pmp_args.pa_fhsize == 0) 1163 return EOPNOTSUPP; 1164 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1165 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1166 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1167 } else { 1168 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1169 cookiesmax = 0; 1170 cookiemem = 0; 1171 } 1172 1173 argsize = sizeof(struct puffs_vnmsg_readdir); 1174 tomove = resid + cookiemem; 1175 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1176 (void **)&readdir_msg, 1); 1177 1178 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1179 readdir_msg->pvnr_offset = uio->uio_offset; 1180 readdir_msg->pvnr_resid = resid; 1181 readdir_msg->pvnr_ncookies = cookiesmax; 1182 readdir_msg->pvnr_eofflag = 0; 1183 readdir_msg->pvnr_dentoff = cookiemem; 1184 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1185 PUFFS_VN_READDIR, VPTOPNC(vp)); 1186 puffs_msg_setdelta(park_readdir, tomove); 1187 1188 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1189 error = checkerr(pmp, error, __func__); 1190 if (error) 1191 goto out; 1192 1193 /* userspace is cheating? */ 1194 if (readdir_msg->pvnr_resid > resid) { 1195 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1196 "resid grew", VPTOPNC(vp)); 1197 ERROUT(EPROTO); 1198 } 1199 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1200 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1201 "too many cookies", VPTOPNC(vp)); 1202 ERROUT(EPROTO); 1203 } 1204 1205 /* check eof */ 1206 if (readdir_msg->pvnr_eofflag) 1207 *ap->a_eofflag = 1; 1208 1209 /* bouncy-wouncy with the directory data */ 1210 howmuch = resid - readdir_msg->pvnr_resid; 1211 1212 /* force eof if no data was returned (getcwd() needs this) */ 1213 if (howmuch == 0) { 1214 *ap->a_eofflag = 1; 1215 goto out; 1216 } 1217 1218 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1219 if (error) 1220 goto out; 1221 1222 /* provide cookies to caller if so desired */ 1223 if (ap->a_cookies) { 1224 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1225 M_TEMP, M_WAITOK); 1226 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1227 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1228 *ap->a_ncookies*CSIZE); 1229 } 1230 1231 /* next readdir starts here */ 1232 uio->uio_offset = readdir_msg->pvnr_offset; 1233 1234 out: 1235 puffs_msgmem_release(park_readdir); 1236 return error; 1237 } 1238 #undef CSIZE 1239 1240 /* 1241 * poll works by consuming the bitmask in pn_revents. If there are 1242 * events available, poll returns immediately. If not, it issues a 1243 * poll to userspace, selrecords itself and returns with no available 1244 * events. When the file server returns, it executes puffs_parkdone_poll(), 1245 * where available events are added to the bitmask. selnotify() is 1246 * then also executed by that function causing us to enter here again 1247 * and hopefully find the missing bits (unless someone got them first, 1248 * in which case it starts all over again). 1249 */ 1250 int 1251 puffs_poll(void *v) 1252 { 1253 struct vop_poll_args /* { 1254 const struct vnodeop_desc *a_desc; 1255 struct vnode *a_vp; 1256 int a_events; 1257 struct lwp *a_l; 1258 }*/ *ap = v; 1259 PUFFS_MSG_VARS(vn, poll); 1260 struct vnode *vp = ap->a_vp; 1261 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1262 struct puffs_node *pn = vp->v_data; 1263 int events, error; 1264 1265 if (EXISTSOP(pmp, POLL)) { 1266 mutex_enter(&pn->pn_mtx); 1267 events = pn->pn_revents & ap->a_events; 1268 if (events & ap->a_events) { 1269 pn->pn_revents &= ~ap->a_events; 1270 mutex_exit(&pn->pn_mtx); 1271 1272 return events; 1273 } else { 1274 puffs_referencenode(pn); 1275 mutex_exit(&pn->pn_mtx); 1276 1277 PUFFS_MSG_ALLOC(vn, poll); 1278 poll_msg->pvnr_events = ap->a_events; 1279 puffs_cidcvt(&poll_msg->pvnr_cid, ap->a_l); 1280 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1281 PUFFS_VN_POLL, VPTOPNC(vp)); 1282 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1283 selrecord(ap->a_l, &pn->pn_sel); 1284 1285 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1286 NULL, error); 1287 PUFFS_MSG_RELEASE(poll); 1288 1289 return 0; 1290 } 1291 } else { 1292 return genfs_poll(v); 1293 } 1294 } 1295 1296 int 1297 puffs_fsync(void *v) 1298 { 1299 struct vop_fsync_args /* { 1300 const struct vnodeop_desc *a_desc; 1301 struct vnode *a_vp; 1302 kauth_cred_t a_cred; 1303 int a_flags; 1304 off_t a_offlo; 1305 off_t a_offhi; 1306 struct lwp *a_l; 1307 } */ *ap = v; 1308 PUFFS_MSG_VARS(vn, fsync); 1309 struct vnode *vp = ap->a_vp; 1310 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1311 struct puffs_node *pn; 1312 struct vattr va; 1313 int pflags, error, dofaf; 1314 1315 pn = VPTOPP(vp); 1316 1317 /* flush out information from our metacache, see vop_setattr */ 1318 if (pn->pn_stat & PNODE_METACACHE_MASK 1319 && (pn->pn_stat & PNODE_DYING) == 0) { 1320 vattr_null(&va); 1321 error = VOP_SETATTR(vp, &va, FSCRED, NULL); 1322 if (error) 1323 return error; 1324 } 1325 1326 /* 1327 * flush pages to avoid being overly dirty 1328 */ 1329 pflags = PGO_CLEANIT; 1330 if (ap->a_flags & FSYNC_WAIT) 1331 pflags |= PGO_SYNCIO; 1332 simple_lock(&vp->v_interlock); 1333 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1334 round_page(ap->a_offhi), pflags); 1335 if (error) 1336 return error; 1337 1338 /* 1339 * HELLO! We exit already here if the user server does not 1340 * support fsync OR if we should call fsync for a node which 1341 * has references neither in the kernel or the fs server. 1342 * Otherwise we continue to issue fsync() forward. 1343 */ 1344 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1345 return 0; 1346 1347 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1348 /* 1349 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1350 * only FAFs for those. Otherwise there's a danger of deadlock, 1351 * since the execution context here might be the user server 1352 * doing some operation on another fs, which in turn caused a 1353 * vnode to be reclaimed from the freelist for this fs. 1354 */ 1355 if (dofaf == 0) { 1356 simple_lock(&vp->v_interlock); 1357 if (vp->v_iflag & VI_XLOCK) 1358 dofaf = 1; 1359 simple_unlock(&vp->v_interlock); 1360 } 1361 1362 PUFFS_MSG_ALLOC(vn, fsync); 1363 if (dofaf) 1364 puffs_msg_setfaf(park_fsync); 1365 1366 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1367 fsync_msg->pvnr_flags = ap->a_flags; 1368 fsync_msg->pvnr_offlo = ap->a_offlo; 1369 fsync_msg->pvnr_offhi = ap->a_offhi; 1370 puffs_cidcvt(&fsync_msg->pvnr_cid, ap->a_l); 1371 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1372 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1373 1374 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1375 PUFFS_MSG_RELEASE(fsync); 1376 1377 error = checkerr(pmp, error, __func__); 1378 1379 return error; 1380 } 1381 1382 int 1383 puffs_seek(void *v) 1384 { 1385 struct vop_seek_args /* { 1386 const struct vnodeop_desc *a_desc; 1387 struct vnode *a_vp; 1388 off_t a_oldoff; 1389 off_t a_newoff; 1390 kauth_cred_t a_cred; 1391 } */ *ap = v; 1392 PUFFS_MSG_VARS(vn, seek); 1393 struct vnode *vp = ap->a_vp; 1394 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1395 int error; 1396 1397 PUFFS_MSG_ALLOC(vn, seek); 1398 seek_msg->pvnr_oldoff = ap->a_oldoff; 1399 seek_msg->pvnr_newoff = ap->a_newoff; 1400 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1401 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1402 PUFFS_VN_SEEK, VPTOPNC(vp)); 1403 1404 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1405 PUFFS_MSG_RELEASE(seek); 1406 return checkerr(pmp, error, __func__); 1407 } 1408 1409 static int 1410 puffs_callremove(struct puffs_mount *pmp, void *dcookie, void *cookie, 1411 struct componentname *cnp) 1412 { 1413 PUFFS_MSG_VARS(vn, remove); 1414 int error; 1415 1416 PUFFS_MSG_ALLOC(vn, remove); 1417 remove_msg->pvnr_cookie_targ = cookie; 1418 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1419 &remove_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1420 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dcookie); 1421 1422 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1423 PUFFS_MSG_RELEASE(remove); 1424 1425 return checkerr(pmp, error, __func__); 1426 } 1427 1428 /* 1429 * XXX: can't use callremove now because can't catch setbacks with 1430 * it due to lack of a pnode argument. 1431 */ 1432 int 1433 puffs_remove(void *v) 1434 { 1435 struct vop_remove_args /* { 1436 const struct vnodeop_desc *a_desc; 1437 struct vnode *a_dvp; 1438 struct vnode *a_vp; 1439 struct componentname *a_cnp; 1440 } */ *ap = v; 1441 PUFFS_MSG_VARS(vn, remove); 1442 struct vnode *dvp = ap->a_dvp; 1443 struct vnode *vp = ap->a_vp; 1444 struct puffs_node *dpn = VPTOPP(dvp); 1445 struct puffs_node *pn = VPTOPP(vp); 1446 struct componentname *cnp = ap->a_cnp; 1447 struct mount *mp = dvp->v_mount; 1448 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1449 int error; 1450 1451 PUFFS_MSG_ALLOC(vn, remove); 1452 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1453 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1454 &remove_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1455 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1456 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1457 1458 puffs_msg_enqueue(pmp, park_remove); 1459 REFPN_AND_UNLOCKVP(dvp, dpn); 1460 if (dvp == vp) 1461 REFPN(pn); 1462 else 1463 REFPN_AND_UNLOCKVP(vp, pn); 1464 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1465 1466 PUFFS_MSG_RELEASE(remove); 1467 1468 RELEPN_AND_VP(dvp, dpn); 1469 RELEPN_AND_VP(vp, pn); 1470 1471 error = checkerr(pmp, error, __func__); 1472 return error; 1473 } 1474 1475 int 1476 puffs_mkdir(void *v) 1477 { 1478 struct vop_mkdir_args /* { 1479 const struct vnodeop_desc *a_desc; 1480 struct vnode *a_dvp; 1481 struct vnode **a_vpp; 1482 struct componentname *a_cnp; 1483 struct vattr *a_vap; 1484 } */ *ap = v; 1485 PUFFS_MSG_VARS(vn, mkdir); 1486 struct vnode *dvp = ap->a_dvp; 1487 struct puffs_node *dpn = VPTOPP(dvp); 1488 struct componentname *cnp = ap->a_cnp; 1489 struct mount *mp = dvp->v_mount; 1490 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1491 int error; 1492 1493 PUFFS_MSG_ALLOC(vn, mkdir); 1494 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1495 &mkdir_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1496 mkdir_msg->pvnr_va = *ap->a_vap; 1497 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1498 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1499 1500 puffs_msg_enqueue(pmp, park_mkdir); 1501 REFPN_AND_UNLOCKVP(dvp, dpn); 1502 error = puffs_msg_wait2(pmp, park_mkdir, dpn, NULL); 1503 1504 error = checkerr(pmp, error, __func__); 1505 if (error) 1506 goto out; 1507 1508 error = puffs_newnode(mp, dvp, ap->a_vpp, 1509 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1510 if (error) 1511 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1512 mkdir_msg->pvnr_newnode, cnp); 1513 1514 out: 1515 PUFFS_MSG_RELEASE(mkdir); 1516 if (error || (cnp->cn_flags & SAVESTART) == 0) 1517 PNBUF_PUT(cnp->cn_pnbuf); 1518 RELEPN_AND_VP(dvp, dpn); 1519 return error; 1520 } 1521 1522 static int 1523 puffs_callrmdir(struct puffs_mount *pmp, void *dcookie, void *cookie, 1524 struct componentname *cnp) 1525 { 1526 PUFFS_MSG_VARS(vn, rmdir); 1527 int error; 1528 1529 PUFFS_MSG_ALLOC(vn, rmdir); 1530 rmdir_msg->pvnr_cookie_targ = cookie; 1531 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1532 &rmdir_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1533 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dcookie); 1534 1535 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1536 PUFFS_MSG_RELEASE(rmdir); 1537 1538 return checkerr(pmp, error, __func__); 1539 } 1540 1541 int 1542 puffs_rmdir(void *v) 1543 { 1544 struct vop_rmdir_args /* { 1545 const struct vnodeop_desc *a_desc; 1546 struct vnode *a_dvp; 1547 struct vnode *a_vp; 1548 struct componentname *a_cnp; 1549 } */ *ap = v; 1550 PUFFS_MSG_VARS(vn, rmdir); 1551 struct vnode *dvp = ap->a_dvp; 1552 struct vnode *vp = ap->a_vp; 1553 struct puffs_node *dpn = VPTOPP(dvp); 1554 struct puffs_node *pn = VPTOPP(vp); 1555 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1556 struct componentname *cnp = ap->a_cnp; 1557 int error; 1558 1559 PUFFS_MSG_ALLOC(vn, rmdir); 1560 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1561 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1562 &rmdir_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1563 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1564 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1565 1566 puffs_msg_enqueue(pmp, park_rmdir); 1567 REFPN_AND_UNLOCKVP(dvp, dpn); 1568 REFPN_AND_UNLOCKVP(vp, pn); 1569 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1570 1571 PUFFS_MSG_RELEASE(rmdir); 1572 1573 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1574 RELEPN_AND_VP(dvp, dpn); 1575 RELEPN_AND_VP(vp, pn); 1576 1577 return error; 1578 } 1579 1580 int 1581 puffs_link(void *v) 1582 { 1583 struct vop_link_args /* { 1584 const struct vnodeop_desc *a_desc; 1585 struct vnode *a_dvp; 1586 struct vnode *a_vp; 1587 struct componentname *a_cnp; 1588 }*/ *ap = v; 1589 PUFFS_MSG_VARS(vn, link); 1590 struct vnode *dvp = ap->a_dvp; 1591 struct vnode *vp = ap->a_vp; 1592 struct puffs_node *dpn = VPTOPP(dvp); 1593 struct puffs_node *pn = VPTOPP(vp); 1594 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1595 struct componentname *cnp = ap->a_cnp; 1596 int error; 1597 1598 PUFFS_MSG_ALLOC(vn, link); 1599 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1600 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1601 &link_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1602 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1603 PUFFS_VN_LINK, VPTOPNC(dvp)); 1604 1605 puffs_msg_enqueue(pmp, park_link); 1606 REFPN_AND_UNLOCKVP(dvp, dpn); 1607 REFPN(pn); 1608 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1609 1610 PUFFS_MSG_RELEASE(link); 1611 1612 error = checkerr(pmp, error, __func__); 1613 1614 /* 1615 * XXX: stay in touch with the cache. I don't like this, but 1616 * don't have a better solution either. See also puffs_rename(). 1617 * 1618 * XXX2: can't use vp safely here 1619 */ 1620 if (error == 0) 1621 puffs_updatenode(vp, PUFFS_UPDATECTIME); 1622 1623 PNBUF_PUT(cnp->cn_pnbuf); 1624 RELEPN_AND_VP(dvp, dpn); 1625 puffs_releasenode(pn); 1626 1627 return error; 1628 } 1629 1630 int 1631 puffs_symlink(void *v) 1632 { 1633 struct vop_symlink_args /* { 1634 const struct vnodeop_desc *a_desc; 1635 struct vnode *a_dvp; 1636 struct vnode **a_vpp; 1637 struct componentname *a_cnp; 1638 struct vattr *a_vap; 1639 char *a_target; 1640 }*/ *ap = v; 1641 PUFFS_MSG_VARS(vn, symlink); 1642 struct vnode *dvp = ap->a_dvp; 1643 struct puffs_node *dpn = VPTOPP(dvp); 1644 struct mount *mp = dvp->v_mount; 1645 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1646 struct componentname *cnp = ap->a_cnp; 1647 int error; 1648 1649 *ap->a_vpp = NULL; 1650 1651 PUFFS_MSG_ALLOC(vn, symlink); 1652 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1653 &symlink_msg->pvnr_cn_cid, cnp, PUFFS_USE_FULLPNBUF(pmp)); 1654 symlink_msg->pvnr_va = *ap->a_vap; 1655 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1656 sizeof(symlink_msg->pvnr_link)); 1657 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1658 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1659 1660 puffs_msg_enqueue(pmp, park_symlink); 1661 REFPN_AND_UNLOCKVP(dvp, dpn); 1662 error = puffs_msg_wait2(pmp, park_symlink, dpn, NULL); 1663 1664 error = checkerr(pmp, error, __func__); 1665 if (error) 1666 goto out; 1667 1668 error = puffs_newnode(mp, dvp, ap->a_vpp, 1669 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 1670 if (error) 1671 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 1672 symlink_msg->pvnr_newnode, cnp); 1673 1674 out: 1675 PUFFS_MSG_RELEASE(symlink); 1676 if (error || (cnp->cn_flags & SAVESTART) == 0) 1677 PNBUF_PUT(cnp->cn_pnbuf); 1678 RELEPN_AND_VP(dvp, dpn); 1679 1680 return error; 1681 } 1682 1683 int 1684 puffs_readlink(void *v) 1685 { 1686 struct vop_readlink_args /* { 1687 const struct vnodeop_desc *a_desc; 1688 struct vnode *a_vp; 1689 struct uio *a_uio; 1690 kauth_cred_t a_cred; 1691 } */ *ap = v; 1692 PUFFS_MSG_VARS(vn, readlink); 1693 struct vnode *vp = ap->a_vp; 1694 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1695 size_t linklen; 1696 int error; 1697 1698 PUFFS_MSG_ALLOC(vn, readlink); 1699 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1700 linklen = sizeof(readlink_msg->pvnr_link); 1701 readlink_msg->pvnr_linklen = linklen; 1702 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1703 PUFFS_VN_READLINK, VPTOPNC(vp)); 1704 1705 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1706 error = checkerr(pmp, error, __func__); 1707 if (error) 1708 goto out; 1709 1710 /* bad bad user file server */ 1711 if (readlink_msg->pvnr_linklen > linklen) { 1712 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1713 "linklen too big", VPTOPNC(ap->a_vp)); 1714 error = EPROTO; 1715 goto out; 1716 } 1717 1718 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 1719 ap->a_uio); 1720 out: 1721 PUFFS_MSG_RELEASE(readlink); 1722 return error; 1723 } 1724 1725 int 1726 puffs_rename(void *v) 1727 { 1728 struct vop_rename_args /* { 1729 const struct vnodeop_desc *a_desc; 1730 struct vnode *a_fdvp; 1731 struct vnode *a_fvp; 1732 struct componentname *a_fcnp; 1733 struct vnode *a_tdvp; 1734 struct vnode *a_tvp; 1735 struct componentname *a_tcnp; 1736 }*/ *ap = v; 1737 PUFFS_MSG_VARS(vn, rename); 1738 struct vnode *fdvp = ap->a_fdvp; 1739 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 1740 int error; 1741 1742 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) 1743 ERROUT(EXDEV); 1744 1745 PUFFS_MSG_ALLOC(vn, rename); 1746 rename_msg->pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1747 rename_msg->pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1748 if (ap->a_tvp) 1749 rename_msg->pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1750 else 1751 rename_msg->pvnr_cookie_targ = NULL; 1752 puffs_makecn(&rename_msg->pvnr_cn_src, 1753 &rename_msg->pvnr_cn_src_cred, &rename_msg->pvnr_cn_src_cid, 1754 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1755 puffs_makecn(&rename_msg->pvnr_cn_targ, 1756 &rename_msg->pvnr_cn_targ_cred, &rename_msg->pvnr_cn_targ_cid, 1757 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1758 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 1759 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 1760 1761 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 1762 error = checkerr(pmp, error, __func__); 1763 1764 /* 1765 * XXX: stay in touch with the cache. I don't like this, but 1766 * don't have a better solution either. See also puffs_link(). 1767 */ 1768 if (error == 0) 1769 puffs_updatenode(ap->a_fvp, PUFFS_UPDATECTIME); 1770 1771 out: 1772 PUFFS_MSG_RELEASE(rename); 1773 if (ap->a_tvp != NULL) 1774 vput(ap->a_tvp); 1775 if (ap->a_tdvp == ap->a_tvp) 1776 vrele(ap->a_tdvp); 1777 else 1778 vput(ap->a_tdvp); 1779 1780 vrele(ap->a_fdvp); 1781 vrele(ap->a_fvp); 1782 1783 return error; 1784 } 1785 1786 #define RWARGS(cont, iofl, move, offset, creds) \ 1787 (cont)->pvnr_ioflag = (iofl); \ 1788 (cont)->pvnr_resid = (move); \ 1789 (cont)->pvnr_offset = (offset); \ 1790 puffs_credcvt(&(cont)->pvnr_cred, creds) 1791 1792 int 1793 puffs_read(void *v) 1794 { 1795 struct vop_read_args /* { 1796 const struct vnodeop_desc *a_desc; 1797 struct vnode *a_vp; 1798 struct uio *a_uio; 1799 int a_ioflag; 1800 kauth_cred_t a_cred; 1801 } */ *ap = v; 1802 PUFFS_MSG_VARS(vn, read); 1803 struct vnode *vp = ap->a_vp; 1804 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1805 struct uio *uio = ap->a_uio; 1806 void *win; 1807 size_t tomove, argsize; 1808 vsize_t bytelen; 1809 int error, ubcflags; 1810 1811 read_msg = NULL; 1812 error = 0; 1813 1814 /* std sanity */ 1815 if (uio->uio_resid == 0) 1816 return 0; 1817 if (uio->uio_offset < 0) 1818 return EINVAL; 1819 1820 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1821 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1822 1823 ubcflags = 0; 1824 if (UBC_WANT_UNMAP(vp)) 1825 ubcflags = UBC_UNMAP; 1826 1827 while (uio->uio_resid > 0) { 1828 bytelen = MIN(uio->uio_resid, 1829 vp->v_size - uio->uio_offset); 1830 if (bytelen == 0) 1831 break; 1832 1833 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1834 &bytelen, advice, UBC_READ); 1835 error = uiomove(win, bytelen, uio); 1836 ubc_release(win, ubcflags); 1837 if (error) 1838 break; 1839 } 1840 1841 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1842 puffs_updatenode(vp, PUFFS_UPDATEATIME); 1843 } else { 1844 /* 1845 * in case it's not a regular file or we're operating 1846 * uncached, do read in the old-fashioned style, 1847 * i.e. explicit read operations 1848 */ 1849 1850 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1851 argsize = sizeof(struct puffs_vnmsg_read); 1852 puffs_msgmem_alloc(argsize + tomove, &park_read, 1853 (void **)&read_msg, 1); 1854 1855 error = 0; 1856 while (uio->uio_resid > 0) { 1857 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1858 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 1859 RWARGS(read_msg, ap->a_ioflag, tomove, 1860 uio->uio_offset, ap->a_cred); 1861 puffs_msg_setinfo(park_read, PUFFSOP_VN, 1862 PUFFS_VN_READ, VPTOPNC(vp)); 1863 puffs_msg_setdelta(park_read, tomove); 1864 1865 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 1866 NULL, error); 1867 error = checkerr(pmp, error, __func__); 1868 if (error) 1869 break; 1870 1871 if (read_msg->pvnr_resid > tomove) { 1872 puffs_senderr(pmp, PUFFS_ERR_READ, 1873 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1874 error = EPROTO; 1875 break; 1876 } 1877 1878 error = uiomove(read_msg->pvnr_data, 1879 tomove - read_msg->pvnr_resid, uio); 1880 1881 /* 1882 * in case the file is out of juice, resid from 1883 * userspace is != 0. and the error-case is 1884 * quite obvious 1885 */ 1886 if (error || read_msg->pvnr_resid) 1887 break; 1888 } 1889 1890 puffs_msgmem_release(park_read); 1891 } 1892 1893 return error; 1894 } 1895 1896 /* 1897 * XXX: in case of a failure, this leaves uio in a bad state. 1898 * We could theoretically copy the uio and iovecs and "replay" 1899 * them the right amount after the userspace trip, but don't 1900 * bother for now. 1901 */ 1902 int 1903 puffs_write(void *v) 1904 { 1905 struct vop_write_args /* { 1906 const struct vnodeop_desc *a_desc; 1907 struct vnode *a_vp; 1908 struct uio *a_uio; 1909 int a_ioflag; 1910 kauth_cred_t a_cred; 1911 } */ *ap = v; 1912 PUFFS_MSG_VARS(vn, write); 1913 struct vnode *vp = ap->a_vp; 1914 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1915 struct uio *uio = ap->a_uio; 1916 size_t tomove, argsize; 1917 off_t oldoff, newoff, origoff; 1918 vsize_t bytelen; 1919 int error, uflags; 1920 int ubcflags; 1921 1922 error = uflags = 0; 1923 write_msg = NULL; 1924 1925 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1926 ubcflags = UBC_WRITE | UBC_PARTIALOK; 1927 if (UBC_WANT_UNMAP(vp)) 1928 ubcflags |= UBC_UNMAP; 1929 1930 /* 1931 * userspace *should* be allowed to control this, 1932 * but with UBC it's a bit unclear how to handle it 1933 */ 1934 if (ap->a_ioflag & IO_APPEND) 1935 uio->uio_offset = vp->v_size; 1936 1937 origoff = uio->uio_offset; 1938 while (uio->uio_resid > 0) { 1939 uflags |= PUFFS_UPDATECTIME; 1940 uflags |= PUFFS_UPDATEMTIME; 1941 oldoff = uio->uio_offset; 1942 bytelen = uio->uio_resid; 1943 1944 newoff = oldoff + bytelen; 1945 if (vp->v_size < newoff) { 1946 uvm_vnp_setwritesize(vp, newoff); 1947 } 1948 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1949 UVM_ADV_RANDOM, ubcflags); 1950 1951 /* 1952 * In case of a ubc_uiomove() error, 1953 * opt to not extend the file at all and 1954 * return an error. Otherwise, if we attempt 1955 * to clear the memory we couldn't fault to, 1956 * we might generate a kernel page fault. 1957 */ 1958 if (vp->v_size < newoff) { 1959 if (error == 0) { 1960 uflags |= PUFFS_UPDATESIZE; 1961 uvm_vnp_setsize(vp, newoff); 1962 } else { 1963 uvm_vnp_setwritesize(vp, vp->v_size); 1964 } 1965 } 1966 if (error) 1967 break; 1968 1969 /* 1970 * If we're writing large files, flush to file server 1971 * every 64k. Otherwise we can very easily exhaust 1972 * kernel and user memory, as the file server cannot 1973 * really keep up with our writing speed. 1974 * 1975 * Note: this does *NOT* honor MNT_ASYNC, because 1976 * that gives userland too much say in the kernel. 1977 */ 1978 if (oldoff >> 16 != uio->uio_offset >> 16) { 1979 simple_lock(&vp->v_interlock); 1980 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1981 uio->uio_offset & ~0xffff, 1982 PGO_CLEANIT | PGO_SYNCIO); 1983 if (error) 1984 break; 1985 } 1986 } 1987 1988 /* synchronous I/O? */ 1989 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1990 simple_lock(&vp->v_interlock); 1991 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1992 round_page(uio->uio_offset), 1993 PGO_CLEANIT | PGO_SYNCIO); 1994 1995 /* write through page cache? */ 1996 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1997 simple_lock(&vp->v_interlock); 1998 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1999 round_page(uio->uio_offset), PGO_CLEANIT); 2000 } 2001 2002 puffs_updatenode(vp, uflags); 2003 } else { 2004 /* tomove is non-increasing */ 2005 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2006 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 2007 puffs_msgmem_alloc(argsize, &park_write, (void **)&write_msg,1); 2008 2009 while (uio->uio_resid > 0) { 2010 /* move data to buffer */ 2011 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 2012 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 2013 RWARGS(write_msg, ap->a_ioflag, tomove, 2014 uio->uio_offset, ap->a_cred); 2015 error = uiomove(write_msg->pvnr_data, tomove, uio); 2016 if (error) 2017 break; 2018 2019 /* move buffer to userspace */ 2020 puffs_msg_setinfo(park_write, PUFFSOP_VN, 2021 PUFFS_VN_WRITE, VPTOPNC(vp)); 2022 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 2023 NULL, error); 2024 error = checkerr(pmp, error, __func__); 2025 if (error) 2026 break; 2027 2028 if (write_msg->pvnr_resid > tomove) { 2029 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2030 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2031 error = EPROTO; 2032 break; 2033 } 2034 2035 /* adjust file size */ 2036 if (vp->v_size < uio->uio_offset) 2037 uvm_vnp_setsize(vp, uio->uio_offset); 2038 2039 /* didn't move everything? bad userspace. bail */ 2040 if (write_msg->pvnr_resid != 0) { 2041 error = EIO; 2042 break; 2043 } 2044 } 2045 puffs_msgmem_release(park_write); 2046 } 2047 2048 return error; 2049 } 2050 2051 int 2052 puffs_print(void *v) 2053 { 2054 struct vop_print_args /* { 2055 struct vnode *a_vp; 2056 } */ *ap = v; 2057 PUFFS_MSG_VARS(vn, print); 2058 struct vnode *vp = ap->a_vp; 2059 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2060 struct puffs_node *pn = vp->v_data; 2061 int error; 2062 2063 /* kernel portion */ 2064 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2065 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 2066 if (vp->v_type == VFIFO) 2067 fifo_printinfo(vp); 2068 lockmgr_printinfo(&vp->v_lock); 2069 2070 /* userspace portion */ 2071 if (EXISTSOP(pmp, PRINT)) { 2072 PUFFS_MSG_ALLOC(vn, print); 2073 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2074 PUFFS_VN_PRINT, VPTOPNC(vp)); 2075 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2076 NULL, error); 2077 PUFFS_MSG_RELEASE(print); 2078 } 2079 2080 return 0; 2081 } 2082 2083 int 2084 puffs_pathconf(void *v) 2085 { 2086 struct vop_pathconf_args /* { 2087 const struct vnodeop_desc *a_desc; 2088 struct vnode *a_vp; 2089 int a_name; 2090 register_t *a_retval; 2091 } */ *ap = v; 2092 PUFFS_MSG_VARS(vn, pathconf); 2093 struct vnode *vp = ap->a_vp; 2094 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2095 int error; 2096 2097 PUFFS_MSG_ALLOC(vn, pathconf); 2098 pathconf_msg->pvnr_name = ap->a_name; 2099 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2100 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2101 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2102 error = checkerr(pmp, error, __func__); 2103 if (!error) 2104 *ap->a_retval = pathconf_msg->pvnr_retval; 2105 PUFFS_MSG_RELEASE(pathconf); 2106 2107 return error; 2108 } 2109 2110 int 2111 puffs_advlock(void *v) 2112 { 2113 struct vop_advlock_args /* { 2114 const struct vnodeop_desc *a_desc; 2115 struct vnode *a_vp; 2116 void *a_id; 2117 int a_op; 2118 struct flock *a_fl; 2119 int a_flags; 2120 } */ *ap = v; 2121 PUFFS_MSG_VARS(vn, advlock); 2122 struct vnode *vp = ap->a_vp; 2123 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2124 int error; 2125 2126 PUFFS_MSG_ALLOC(vn, advlock); 2127 error = copyin(ap->a_fl, &advlock_msg->pvnr_fl, sizeof(struct flock)); 2128 if (error) 2129 goto out; 2130 advlock_msg->pvnr_id = ap->a_id; 2131 advlock_msg->pvnr_op = ap->a_op; 2132 advlock_msg->pvnr_flags = ap->a_flags; 2133 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2134 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2135 2136 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2137 error = checkerr(pmp, error, __func__); 2138 2139 out: 2140 PUFFS_MSG_RELEASE(advlock); 2141 return error; 2142 } 2143 2144 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2145 #define BIOREAD(bp) (bp->b_flags & B_READ) 2146 #define BIOWRITE(bp) ((bp->b_flags & B_READ) == 0) 2147 2148 /* 2149 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2150 */ 2151 int 2152 puffs_strategy(void *v) 2153 { 2154 struct vop_strategy_args /* { 2155 const struct vnodeop_desc *a_desc; 2156 struct vnode *a_vp; 2157 struct buf *a_bp; 2158 } */ *ap = v; 2159 PUFFS_MSG_VARS(vn, rw); 2160 struct vnode *vp = ap->a_vp; 2161 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2162 struct puffs_node *pn; 2163 struct buf *bp; 2164 size_t argsize; 2165 size_t tomove, moved; 2166 int error, dofaf, dobiodone; 2167 2168 pmp = MPTOPUFFSMP(vp->v_mount); 2169 bp = ap->a_bp; 2170 error = 0; 2171 dofaf = 0; 2172 pn = VPTOPP(vp); 2173 park_rw = NULL; /* explicit */ 2174 dobiodone = 1; 2175 2176 if ((BIOREAD(bp) && !EXISTSOP(pmp, READ)) 2177 || (BIOWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2178 ERROUT(EOPNOTSUPP); 2179 2180 /* 2181 * Short-circuit optimization: don't flush buffer in between 2182 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2183 */ 2184 if (pn->pn_stat & PNODE_DYING) { 2185 KASSERT(BIOWRITE(bp)); 2186 bp->b_resid = 0; 2187 goto out; 2188 } 2189 2190 #ifdef DIAGNOSTIC 2191 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2192 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2193 bp->b_bcount); 2194 #endif 2195 2196 /* 2197 * See explanation for the necessity of a FAF in puffs_fsync. 2198 * 2199 * Also, do FAF in case we're suspending. 2200 * See puffs_vfsops.c:pageflush() 2201 */ 2202 if (BIOWRITE(bp)) { 2203 simple_lock(&vp->v_interlock); 2204 if (vp->v_iflag & VI_XLOCK) 2205 dofaf = 1; 2206 if (pn->pn_stat & PNODE_SUSPEND) 2207 dofaf = 1; 2208 simple_unlock(&vp->v_interlock); 2209 } 2210 2211 #ifdef DIAGNOSTIC 2212 if (curlwp == uvm.pagedaemon_lwp) 2213 KASSERT(dofaf || BIOASYNC(bp)); 2214 #endif 2215 2216 /* allocate transport structure */ 2217 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2218 argsize = sizeof(struct puffs_vnmsg_rw); 2219 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2220 (void **)&rw_msg, dofaf ? 0 : 1); 2221 if (error) 2222 goto out; 2223 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2224 2225 /* 2x2 cases: read/write, faf/nofaf */ 2226 if (BIOREAD(bp)) { 2227 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2228 PUFFS_VN_READ, VPTOPNC(vp)); 2229 puffs_msg_setdelta(park_rw, tomove); 2230 if (BIOASYNC(bp)) { 2231 puffs_msg_setcall(park_rw, 2232 puffs_parkdone_asyncbioread, bp); 2233 puffs_msg_enqueue(pmp, park_rw); 2234 dobiodone = 0; 2235 } else { 2236 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2237 NULL, error); 2238 error = checkerr(pmp, error, __func__); 2239 if (error) 2240 goto out; 2241 2242 if (rw_msg->pvnr_resid > tomove) { 2243 puffs_senderr(pmp, PUFFS_ERR_READ, 2244 E2BIG, "resid grew", VPTOPNC(vp)); 2245 ERROUT(EPROTO); 2246 } 2247 2248 moved = tomove - rw_msg->pvnr_resid; 2249 2250 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2251 bp->b_resid = bp->b_bcount - moved; 2252 } 2253 } else { 2254 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2255 PUFFS_VN_WRITE, VPTOPNC(vp)); 2256 /* 2257 * make pages read-only before we write them if we want 2258 * write caching info 2259 */ 2260 if (PUFFS_WCACHEINFO(pmp)) { 2261 struct uvm_object *uobj = &vp->v_uobj; 2262 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2263 struct vm_page *vmp; 2264 int i; 2265 2266 for (i = 0; i < npages; i++) { 2267 vmp= uvm_pageratop((vaddr_t)bp->b_data 2268 + (i << PAGE_SHIFT)); 2269 DPRINTF(("puffs_strategy: write-protecting " 2270 "vp %p page %p, offset %" PRId64"\n", 2271 vp, vmp, vmp->offset)); 2272 simple_lock(&uobj->vmobjlock); 2273 vmp->flags |= PG_RDONLY; 2274 pmap_page_protect(vmp, VM_PROT_READ); 2275 simple_unlock(&uobj->vmobjlock); 2276 } 2277 } 2278 2279 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2280 if (dofaf) { 2281 puffs_msg_setfaf(park_rw); 2282 } else if (BIOASYNC(bp)) { 2283 puffs_msg_setcall(park_rw, 2284 puffs_parkdone_asyncbiowrite, bp); 2285 dobiodone = 0; 2286 } 2287 2288 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2289 2290 if (dobiodone == 0) 2291 goto out; 2292 2293 /* 2294 * XXXXXXXX: wrong, but kernel can't survive strategy 2295 * failure currently. Here, have one more X: X. 2296 */ 2297 if (error != ENOMEM) 2298 error = 0; 2299 2300 error = checkerr(pmp, error, __func__); 2301 if (error) 2302 goto out; 2303 2304 if (rw_msg->pvnr_resid > tomove) { 2305 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2306 E2BIG, "resid grew", VPTOPNC(vp)); 2307 ERROUT(EPROTO); 2308 } 2309 2310 /* 2311 * FAF moved everything. Frankly, we don't 2312 * really have a choice. 2313 */ 2314 if (dofaf && error == 0) 2315 moved = tomove; 2316 else 2317 moved = tomove - rw_msg->pvnr_resid; 2318 2319 bp->b_resid = bp->b_bcount - moved; 2320 if (bp->b_resid != 0) { 2321 ERROUT(EIO); 2322 } 2323 } 2324 2325 out: 2326 if (park_rw) 2327 puffs_msgmem_release(park_rw); 2328 2329 if (error) 2330 bp->b_error = error; 2331 2332 if (error || dobiodone) 2333 biodone(bp); 2334 2335 return error; 2336 } 2337 2338 int 2339 puffs_mmap(void *v) 2340 { 2341 struct vop_mmap_args /* { 2342 const struct vnodeop_desc *a_desc; 2343 struct vnode *a_vp; 2344 vm_prot_t a_prot; 2345 kauth_cred_t a_cred; 2346 struct lwp *a_l; 2347 } */ *ap = v; 2348 PUFFS_MSG_VARS(vn, mmap); 2349 struct vnode *vp = ap->a_vp; 2350 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2351 int error; 2352 2353 if (!PUFFS_USE_PAGECACHE(pmp)) 2354 return genfs_eopnotsupp(v); 2355 2356 if (EXISTSOP(pmp, MMAP)) { 2357 PUFFS_MSG_ALLOC(vn, mmap); 2358 mmap_msg->pvnr_prot = ap->a_prot; 2359 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2360 puffs_cidcvt(&mmap_msg->pvnr_cid, ap->a_l); 2361 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2362 PUFFS_VN_MMAP, VPTOPNC(vp)); 2363 2364 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2365 error = checkerr(pmp, error, __func__); 2366 PUFFS_MSG_RELEASE(mmap); 2367 } else { 2368 error = genfs_mmap(v); 2369 } 2370 2371 return error; 2372 } 2373 2374 2375 /* 2376 * The rest don't get a free trip to userspace and back, they 2377 * have to stay within the kernel. 2378 */ 2379 2380 /* 2381 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2382 * well, maybe somehow, somewhere, some day .... 2383 */ 2384 int 2385 puffs_bmap(void *v) 2386 { 2387 struct vop_bmap_args /* { 2388 const struct vnodeop_desc *a_desc; 2389 struct vnode *a_vp; 2390 daddr_t a_bn; 2391 struct vnode **a_vpp; 2392 daddr_t *a_bnp; 2393 int *a_runp; 2394 } */ *ap = v; 2395 struct puffs_mount *pmp; 2396 2397 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2398 2399 if (ap->a_vpp) 2400 *ap->a_vpp = ap->a_vp; 2401 if (ap->a_bnp) 2402 *ap->a_bnp = ap->a_bn; 2403 if (ap->a_runp) 2404 *ap->a_runp 2405 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2406 2407 return 0; 2408 } 2409 2410 /* 2411 * Handle getpages faults in puffs. We let genfs_getpages() do most 2412 * of the dirty work, but we come in this route to do accounting tasks. 2413 * If the user server has specified functions for cache notifications 2414 * about reads and/or writes, we record which type of operation we got, 2415 * for which page range, and proceed to issue a FAF notification to the 2416 * server about it. 2417 */ 2418 int 2419 puffs_getpages(void *v) 2420 { 2421 struct vop_getpages_args /* { 2422 const struct vnodeop_desc *a_desc; 2423 struct vnode *a_vp; 2424 voff_t a_offset; 2425 struct vm_page **a_m; 2426 int *a_count; 2427 int a_centeridx; 2428 vm_prot_t a_access_type; 2429 int a_advice; 2430 int a_flags; 2431 } */ *ap = v; 2432 struct puffs_mount *pmp; 2433 struct puffs_node *pn; 2434 struct vnode *vp; 2435 struct vm_page **pgs; 2436 struct puffs_cacheinfo *pcinfo = NULL; 2437 struct puffs_cacherun *pcrun; 2438 void *parkmem = NULL; 2439 size_t runsizes; 2440 int i, npages, si, streakon; 2441 int error, locked, write; 2442 2443 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2444 npages = *ap->a_count; 2445 pgs = ap->a_m; 2446 vp = ap->a_vp; 2447 pn = vp->v_data; 2448 locked = (ap->a_flags & PGO_LOCKED) != 0; 2449 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2450 2451 /* ccg xnaht - gets Wuninitialized wrong */ 2452 pcrun = NULL; 2453 runsizes = 0; 2454 2455 /* 2456 * Check that we aren't trying to fault in pages which our file 2457 * server doesn't know about. This happens if we extend a file by 2458 * skipping some pages and later try to fault in pages which 2459 * are between pn_serversize and vp_size. This check optimizes 2460 * away the common case where a file is being extended. 2461 */ 2462 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2463 struct vattr va; 2464 2465 /* try again later when we can block */ 2466 if (locked) 2467 ERROUT(EBUSY); 2468 2469 simple_unlock(&vp->v_interlock); 2470 vattr_null(&va); 2471 va.va_size = vp->v_size; 2472 error = puffs_dosetattr(vp, &va, FSCRED, NULL, 0); 2473 if (error) 2474 ERROUT(error); 2475 simple_lock(&vp->v_interlock); 2476 } 2477 2478 if (write && PUFFS_WCACHEINFO(pmp)) { 2479 #ifdef notnowjohn 2480 /* allocate worst-case memory */ 2481 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2482 pcinfo = malloc(sizeof(struct puffs_cacheinfo) + runsizes, 2483 M_PUFFS, M_ZERO | locked ? M_NOWAIT : M_WAITOK); 2484 2485 /* 2486 * can't block if we're locked and can't mess up caching 2487 * information for fs server. so come back later, please 2488 */ 2489 if (pcinfo == NULL) 2490 ERROUT(ENOMEM); 2491 2492 parkmem = puffs_park_alloc(locked == 0); 2493 if (parkmem == NULL) 2494 ERROUT(ENOMEM); 2495 2496 pcrun = pcinfo->pcache_runs; 2497 #else 2498 (void)parkmem; 2499 #endif 2500 } 2501 2502 error = genfs_getpages(v); 2503 if (error) 2504 goto out; 2505 2506 if (PUFFS_WCACHEINFO(pmp) == 0) 2507 goto out; 2508 2509 /* 2510 * Let's see whose fault it was and inform the user server of 2511 * possibly read/written pages. Map pages from read faults 2512 * strictly read-only, since otherwise we might miss info on 2513 * when the page is actually write-faulted to. 2514 */ 2515 if (!locked) 2516 simple_lock(&vp->v_uobj.vmobjlock); 2517 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2518 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2519 if (streakon && write) { 2520 streakon = 0; 2521 pcrun[si].pcache_runend 2522 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2523 si++; 2524 } 2525 continue; 2526 } 2527 if (streakon == 0 && write) { 2528 streakon = 1; 2529 pcrun[si].pcache_runstart = pgs[i]->offset; 2530 } 2531 2532 if (!write) 2533 pgs[i]->flags |= PG_RDONLY; 2534 } 2535 /* was the last page part of our streak? */ 2536 if (streakon) { 2537 pcrun[si].pcache_runend 2538 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2539 si++; 2540 } 2541 if (!locked) 2542 simple_unlock(&vp->v_uobj.vmobjlock); 2543 2544 KASSERT(si <= (npages / 2) + 1); 2545 2546 #ifdef notnowjohn 2547 /* send results to userspace */ 2548 if (write) 2549 puffs_cacheop(pmp, parkmem, pcinfo, 2550 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2551 #endif 2552 2553 out: 2554 if (error) { 2555 if (pcinfo != NULL) 2556 free(pcinfo, M_PUFFS); 2557 #ifdef notnowjohn 2558 if (parkmem != NULL) 2559 puffs_park_release(parkmem, 1); 2560 #endif 2561 } 2562 2563 return error; 2564 } 2565 2566 int 2567 puffs_lock(void *v) 2568 { 2569 struct vop_lock_args /* { 2570 struct vnode *a_vp; 2571 int a_flags; 2572 }*/ *ap = v; 2573 struct vnode *vp = ap->a_vp; 2574 struct mount *mp = vp->v_mount; 2575 2576 #if 0 2577 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2578 #endif 2579 2580 /* 2581 * XXX: this avoids deadlocking when we're suspending. 2582 * e.g. some ops holding the vnode lock might be blocked for 2583 * the vfs transaction lock so we'd deadlock. 2584 * 2585 * Now once again this is skating on the thin ice of modern life, 2586 * since we are breaking the consistency guarantee provided 2587 * _to the user server_ by vnode locking. Hopefully this will 2588 * get fixed soon enough by getting rid of the dependency on 2589 * vnode locks alltogether. 2590 */ 2591 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2592 if (ap->a_flags & LK_INTERLOCK) 2593 simple_unlock(&vp->v_interlock); 2594 return 0; 2595 } 2596 2597 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2598 } 2599 2600 int 2601 puffs_unlock(void *v) 2602 { 2603 struct vop_unlock_args /* { 2604 struct vnode *a_vp; 2605 int a_flags; 2606 } */ *ap = v; 2607 struct vnode *vp = ap->a_vp; 2608 struct mount *mp = vp->v_mount; 2609 2610 #if 0 2611 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2612 #endif 2613 2614 /* XXX: see puffs_lock() */ 2615 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2616 if (ap->a_flags & LK_INTERLOCK) 2617 simple_unlock(&vp->v_interlock); 2618 return 0; 2619 } 2620 2621 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2622 } 2623 2624 int 2625 puffs_islocked(void *v) 2626 { 2627 struct vop_islocked_args *ap = v; 2628 int rv; 2629 2630 rv = lockstatus(&ap->a_vp->v_lock); 2631 return rv; 2632 } 2633 2634 int 2635 puffs_generic(void *v) 2636 { 2637 struct vop_generic_args *ap = v; 2638 2639 (void)ap; 2640 DPRINTF(("puffs_generic: ap->a_desc = %s\n", ap->a_desc->vdesc_name)); 2641 2642 return EOPNOTSUPP; 2643 } 2644 2645 2646 /* 2647 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2648 * FAF update information for the puffs node first. 2649 */ 2650 int 2651 puffs_spec_read(void *v) 2652 { 2653 struct vop_read_args /* { 2654 const struct vnodeop_desc *a_desc; 2655 struct vnode *a_vp; 2656 struct uio *a_uio; 2657 int a_ioflag; 2658 kauth_cred_t a_cred; 2659 } */ *ap = v; 2660 2661 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2662 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2663 } 2664 2665 int 2666 puffs_spec_write(void *v) 2667 { 2668 struct vop_write_args /* { 2669 const struct vnodeop_desc *a_desc; 2670 struct vnode *a_vp; 2671 struct uio *a_uio; 2672 int a_ioflag; 2673 kauth_cred_t a_cred; 2674 }*/ *ap = v; 2675 2676 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2677 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2678 } 2679 2680 int 2681 puffs_fifo_read(void *v) 2682 { 2683 struct vop_read_args /* { 2684 const struct vnodeop_desc *a_desc; 2685 struct vnode *a_vp; 2686 struct uio *a_uio; 2687 int a_ioflag; 2688 kauth_cred_t a_cred; 2689 } */ *ap = v; 2690 2691 puffs_updatenode(ap->a_vp, PUFFS_UPDATEATIME); 2692 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2693 } 2694 2695 int 2696 puffs_fifo_write(void *v) 2697 { 2698 struct vop_write_args /* { 2699 const struct vnodeop_desc *a_desc; 2700 struct vnode *a_vp; 2701 struct uio *a_uio; 2702 int a_ioflag; 2703 kauth_cred_t a_cred; 2704 }*/ *ap = v; 2705 2706 puffs_updatenode(ap->a_vp, PUFFS_UPDATEMTIME); 2707 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2708 } 2709
Indexes created Tue Sep 30 11:09:46 GMT 2025