puffs_vnops.c revision 1.137
1 /* $NetBSD: puffs_vnops.c,v 1.137 2009/11/05 19:22:57 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 1.137 2009/11/05 19:22:57 pooka Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/buf.h> 37 #include <sys/fstrans.h> 38 #include <sys/malloc.h> 39 #include <sys/mount.h> 40 #include <sys/namei.h> 41 #include <sys/vnode.h> 42 #include <sys/proc.h> 43 44 #include <uvm/uvm.h> 45 46 #include <fs/puffs/puffs_msgif.h> 47 #include <fs/puffs/puffs_sys.h> 48 49 #include <miscfs/fifofs/fifo.h> 50 #include <miscfs/genfs/genfs.h> 51 #include <miscfs/specfs/specdev.h> 52 53 int puffs_vnop_lookup(void *); 54 int puffs_vnop_create(void *); 55 int puffs_vnop_access(void *); 56 int puffs_vnop_mknod(void *); 57 int puffs_vnop_open(void *); 58 int puffs_vnop_close(void *); 59 int puffs_vnop_getattr(void *); 60 int puffs_vnop_setattr(void *); 61 int puffs_vnop_reclaim(void *); 62 int puffs_vnop_readdir(void *); 63 int puffs_vnop_poll(void *); 64 int puffs_vnop_fsync(void *); 65 int puffs_vnop_seek(void *); 66 int puffs_vnop_remove(void *); 67 int puffs_vnop_mkdir(void *); 68 int puffs_vnop_rmdir(void *); 69 int puffs_vnop_link(void *); 70 int puffs_vnop_readlink(void *); 71 int puffs_vnop_symlink(void *); 72 int puffs_vnop_rename(void *); 73 int puffs_vnop_read(void *); 74 int puffs_vnop_write(void *); 75 int puffs_vnop_fcntl(void *); 76 int puffs_vnop_ioctl(void *); 77 int puffs_vnop_inactive(void *); 78 int puffs_vnop_print(void *); 79 int puffs_vnop_pathconf(void *); 80 int puffs_vnop_advlock(void *); 81 int puffs_vnop_strategy(void *); 82 int puffs_vnop_bmap(void *); 83 int puffs_vnop_mmap(void *); 84 int puffs_vnop_getpages(void *); 85 int puffs_vnop_abortop(void *); 86 87 int puffs_vnop_spec_read(void *); 88 int puffs_vnop_spec_write(void *); 89 int puffs_vnop_fifo_read(void *); 90 int puffs_vnop_fifo_write(void *); 91 92 int puffs_vnop_checkop(void *); 93 94 95 #if 0 96 #define puffs_lock genfs_lock 97 #define puffs_unlock genfs_unlock 98 #define puffs_islocked genfs_islocked 99 #else 100 int puffs_vnop_lock(void *); 101 int puffs_vnop_unlock(void *); 102 int puffs_vnop_islocked(void *); 103 #endif 104 105 int (**puffs_vnodeop_p)(void *); 106 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 107 { &vop_default_desc, vn_default_error }, 108 { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ 109 { &vop_create_desc, puffs_vnop_checkop }, /* create */ 110 { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ 111 { &vop_open_desc, puffs_vnop_open }, /* REAL open */ 112 { &vop_close_desc, puffs_vnop_checkop }, /* close */ 113 { &vop_access_desc, puffs_vnop_access }, /* REAL access */ 114 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 115 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 116 { &vop_read_desc, puffs_vnop_checkop }, /* read */ 117 { &vop_write_desc, puffs_vnop_checkop }, /* write */ 118 { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ 119 { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ 120 { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ 121 { &vop_link_desc, puffs_vnop_checkop }, /* link */ 122 { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ 123 { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ 124 { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ 125 { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ 126 { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ 127 { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ 128 { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ 129 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 130 { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ 131 { &vop_advlock_desc, puffs_vnop_checkop }, /* advlock */ 132 { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ 133 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 134 { &vop_abortop_desc, puffs_vnop_abortop }, /* REAL abortop */ 135 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 136 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 137 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 138 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 139 { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ 140 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 141 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 142 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 143 { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ 144 { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ 145 146 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 147 { NULL, NULL } 148 }; 149 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 150 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 151 152 153 int (**puffs_specop_p)(void *); 154 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 155 { &vop_default_desc, vn_default_error }, 156 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 157 { &vop_create_desc, spec_create }, /* genfs_badop */ 158 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 159 { &vop_open_desc, spec_open }, /* spec_open */ 160 { &vop_close_desc, spec_close }, /* spec_close */ 161 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 162 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 163 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 164 { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ 165 { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ 166 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 167 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 168 { &vop_poll_desc, spec_poll }, /* spec_poll */ 169 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 170 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 171 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 172 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 173 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 174 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 175 { &vop_link_desc, spec_link }, /* genfs_badop */ 176 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 177 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 178 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 179 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 180 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 181 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 182 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 183 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 184 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 185 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 186 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 187 { &vop_bmap_desc, spec_bmap }, /* dummy */ 188 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 189 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 190 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 191 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 192 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 193 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 194 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 195 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 196 #if 0 197 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 198 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 199 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 200 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 201 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 202 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 203 #endif 204 { NULL, NULL } 205 }; 206 const struct vnodeopv_desc puffs_specop_opv_desc = 207 { &puffs_specop_p, puffs_specop_entries }; 208 209 210 int (**puffs_fifoop_p)(void *); 211 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 212 { &vop_default_desc, vn_default_error }, 213 { &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */ 214 { &vop_create_desc, fifo_create }, /* genfs_badop */ 215 { &vop_mknod_desc, fifo_mknod }, /* genfs_badop */ 216 { &vop_open_desc, fifo_open }, /* open */ 217 { &vop_close_desc, fifo_close }, /* close */ 218 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 219 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 220 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 221 { &vop_read_desc, puffs_vnop_fifo_read }, /* read, update */ 222 { &vop_write_desc, puffs_vnop_fifo_write }, /* write, update */ 223 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 224 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 225 { &vop_poll_desc, fifo_poll }, /* poll */ 226 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 227 { &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */ 228 { &vop_mmap_desc, fifo_mmap }, /* genfs_badop */ 229 { &vop_fsync_desc, fifo_fsync }, /* genfs_nullop*/ 230 { &vop_seek_desc, fifo_seek }, /* genfs_badop */ 231 { &vop_remove_desc, fifo_remove }, /* genfs_badop */ 232 { &vop_link_desc, fifo_link }, /* genfs_badop */ 233 { &vop_rename_desc, fifo_rename }, /* genfs_badop */ 234 { &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */ 235 { &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */ 236 { &vop_symlink_desc, fifo_symlink }, /* genfs_badop */ 237 { &vop_readdir_desc, fifo_readdir }, /* genfs_badop */ 238 { &vop_readlink_desc, fifo_readlink }, /* genfs_badop */ 239 { &vop_abortop_desc, fifo_abortop }, /* genfs_badop */ 240 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 241 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 242 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 243 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 244 { &vop_bmap_desc, fifo_bmap }, /* dummy */ 245 { &vop_strategy_desc, fifo_strategy }, /* genfs_badop */ 246 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 247 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 248 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 249 { &vop_advlock_desc, fifo_advlock }, /* genfs_einval */ 250 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 251 { &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/ 252 #if 0 253 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 254 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 255 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 256 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 257 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 258 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 259 #endif 260 { NULL, NULL } 261 }; 262 const struct vnodeopv_desc puffs_fifoop_opv_desc = 263 { &puffs_fifoop_p, puffs_fifoop_entries }; 264 265 266 /* "real" vnode operations */ 267 int (**puffs_msgop_p)(void *); 268 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 269 { &vop_default_desc, vn_default_error }, 270 { &vop_create_desc, puffs_vnop_create }, /* create */ 271 { &vop_mknod_desc, puffs_vnop_mknod }, /* mknod */ 272 { &vop_open_desc, puffs_vnop_open }, /* open */ 273 { &vop_close_desc, puffs_vnop_close }, /* close */ 274 { &vop_access_desc, puffs_vnop_access }, /* access */ 275 { &vop_getattr_desc, puffs_vnop_getattr }, /* getattr */ 276 { &vop_setattr_desc, puffs_vnop_setattr }, /* setattr */ 277 { &vop_read_desc, puffs_vnop_read }, /* read */ 278 { &vop_write_desc, puffs_vnop_write }, /* write */ 279 { &vop_seek_desc, puffs_vnop_seek }, /* seek */ 280 { &vop_remove_desc, puffs_vnop_remove }, /* remove */ 281 { &vop_link_desc, puffs_vnop_link }, /* link */ 282 { &vop_rename_desc, puffs_vnop_rename }, /* rename */ 283 { &vop_mkdir_desc, puffs_vnop_mkdir }, /* mkdir */ 284 { &vop_rmdir_desc, puffs_vnop_rmdir }, /* rmdir */ 285 { &vop_symlink_desc, puffs_vnop_symlink }, /* symlink */ 286 { &vop_readdir_desc, puffs_vnop_readdir }, /* readdir */ 287 { &vop_readlink_desc, puffs_vnop_readlink }, /* readlink */ 288 { &vop_print_desc, puffs_vnop_print }, /* print */ 289 { &vop_islocked_desc, puffs_vnop_islocked }, /* islocked */ 290 { &vop_pathconf_desc, puffs_vnop_pathconf }, /* pathconf */ 291 { &vop_advlock_desc, puffs_vnop_advlock }, /* advlock */ 292 { &vop_getpages_desc, puffs_vnop_getpages }, /* getpages */ 293 { NULL, NULL } 294 }; 295 const struct vnodeopv_desc puffs_msgop_opv_desc = 296 { &puffs_msgop_p, puffs_msgop_entries }; 297 298 299 #define ERROUT(err) \ 300 do { \ 301 error = err; \ 302 goto out; \ 303 } while (/*CONSTCOND*/0) 304 305 /* 306 * This is a generic vnode operation handler. It checks if the necessary 307 * operations for the called vnode operation are implemented by userspace 308 * and either returns a dummy return value or proceeds to call the real 309 * vnode operation from puffs_msgop_v. 310 * 311 * XXX: this should described elsewhere and autogenerated, the complexity 312 * of the vnode operations vectors and their interrelationships is also 313 * getting a bit out of hand. Another problem is that we need this same 314 * information in the fs server code, so keeping the two in sync manually 315 * is not a viable (long term) plan. 316 */ 317 318 /* not supported, handle locking protocol */ 319 #define CHECKOP_NOTSUPP(op) \ 320 case VOP_##op##_DESCOFFSET: \ 321 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 322 return genfs_eopnotsupp(v); \ 323 break 324 325 /* always succeed, no locking */ 326 #define CHECKOP_SUCCESS(op) \ 327 case VOP_##op##_DESCOFFSET: \ 328 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 329 return 0; \ 330 break 331 332 int 333 puffs_vnop_checkop(void *v) 334 { 335 struct vop_generic_args /* { 336 struct vnodeop_desc *a_desc; 337 spooky mystery contents; 338 } */ *ap = v; 339 struct vnodeop_desc *desc = ap->a_desc; 340 struct puffs_mount *pmp; 341 struct vnode *vp; 342 int offset, rv; 343 344 offset = ap->a_desc->vdesc_vp_offsets[0]; 345 #ifdef DIAGNOSTIC 346 if (offset == VDESC_NO_OFFSET) 347 panic("puffs_checkop: no vnode, why did you call me?"); 348 #endif 349 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 350 pmp = MPTOPUFFSMP(vp->v_mount); 351 352 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 353 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 354 355 if (!ALLOPS(pmp)) { 356 switch (desc->vdesc_offset) { 357 CHECKOP_NOTSUPP(CREATE); 358 CHECKOP_NOTSUPP(MKNOD); 359 CHECKOP_NOTSUPP(GETATTR); 360 CHECKOP_NOTSUPP(SETATTR); 361 CHECKOP_NOTSUPP(READ); 362 CHECKOP_NOTSUPP(WRITE); 363 CHECKOP_NOTSUPP(FCNTL); 364 CHECKOP_NOTSUPP(IOCTL); 365 CHECKOP_NOTSUPP(REMOVE); 366 CHECKOP_NOTSUPP(LINK); 367 CHECKOP_NOTSUPP(RENAME); 368 CHECKOP_NOTSUPP(MKDIR); 369 CHECKOP_NOTSUPP(RMDIR); 370 CHECKOP_NOTSUPP(SYMLINK); 371 CHECKOP_NOTSUPP(READDIR); 372 CHECKOP_NOTSUPP(READLINK); 373 CHECKOP_NOTSUPP(PRINT); 374 CHECKOP_NOTSUPP(PATHCONF); 375 CHECKOP_NOTSUPP(ADVLOCK); 376 377 CHECKOP_SUCCESS(ACCESS); 378 CHECKOP_SUCCESS(CLOSE); 379 CHECKOP_SUCCESS(SEEK); 380 381 case VOP_GETPAGES_DESCOFFSET: 382 if (!EXISTSOP(pmp, READ)) 383 return genfs_eopnotsupp(v); 384 break; 385 386 default: 387 panic("puffs_checkop: unhandled vnop %d", 388 desc->vdesc_offset); 389 } 390 } 391 392 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 393 394 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 395 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 396 397 return rv; 398 } 399 400 static int callremove(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 401 struct componentname *); 402 static int callrmdir(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 403 struct componentname *); 404 static void callinactive(struct puffs_mount *, puffs_cookie_t, int); 405 static void callreclaim(struct puffs_mount *, puffs_cookie_t); 406 407 #define PUFFS_ABORT_LOOKUP 1 408 #define PUFFS_ABORT_CREATE 2 409 #define PUFFS_ABORT_MKNOD 3 410 #define PUFFS_ABORT_MKDIR 4 411 #define PUFFS_ABORT_SYMLINK 5 412 413 /* 414 * Press the pani^Wabort button! Kernel resource allocation failed. 415 */ 416 static void 417 puffs_abortbutton(struct puffs_mount *pmp, int what, 418 puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) 419 { 420 421 switch (what) { 422 case PUFFS_ABORT_CREATE: 423 case PUFFS_ABORT_MKNOD: 424 case PUFFS_ABORT_SYMLINK: 425 callremove(pmp, dck, ck, cnp); 426 break; 427 case PUFFS_ABORT_MKDIR: 428 callrmdir(pmp, dck, ck, cnp); 429 break; 430 } 431 432 callinactive(pmp, ck, 0); 433 callreclaim(pmp, ck); 434 } 435 436 /* 437 * Begin vnode operations. 438 * 439 * A word from the keymaster about locks: generally we don't want 440 * to use the vnode locks at all: it creates an ugly dependency between 441 * the userlandia file server and the kernel. But we'll play along with 442 * the kernel vnode locks for now. However, even currently we attempt 443 * to release locks as early as possible. This is possible for some 444 * operations which a) don't need a locked vnode after the userspace op 445 * and b) return with the vnode unlocked. Theoretically we could 446 * unlock-do op-lock for others and order the graph in userspace, but I 447 * don't want to think of the consequences for the time being. 448 */ 449 450 int 451 puffs_vnop_lookup(void *v) 452 { 453 struct vop_lookup_args /* { 454 const struct vnodeop_desc *a_desc; 455 struct vnode *a_dvp; 456 struct vnode **a_vpp; 457 struct componentname *a_cnp; 458 } */ *ap = v; 459 PUFFS_MSG_VARS(vn, lookup); 460 struct puffs_mount *pmp; 461 struct componentname *cnp; 462 struct vnode *vp, *dvp; 463 struct puffs_node *dpn; 464 int isdot; 465 int error; 466 467 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 468 cnp = ap->a_cnp; 469 dvp = ap->a_dvp; 470 *ap->a_vpp = NULL; 471 472 /* r/o fs? we check create later to handle EEXIST */ 473 if ((cnp->cn_flags & ISLASTCN) 474 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 475 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 476 return EROFS; 477 478 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 479 480 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 481 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 482 483 /* 484 * Check if someone fed it into the cache 485 */ 486 if (PUFFS_USE_NAMECACHE(pmp)) { 487 error = cache_lookup(dvp, ap->a_vpp, cnp); 488 489 if (error >= 0) 490 return error; 491 } 492 493 if (isdot) { 494 vp = ap->a_dvp; 495 vref(vp); 496 *ap->a_vpp = vp; 497 return 0; 498 } 499 500 PUFFS_MSG_ALLOC(vn, lookup); 501 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 502 cnp, PUFFS_USE_FULLPNBUF(pmp)); 503 504 if (cnp->cn_flags & ISDOTDOT) 505 VOP_UNLOCK(dvp, 0); 506 507 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 508 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 509 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 510 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 511 512 /* 513 * In case of error, there is no new vnode to play with, so be 514 * happy with the NULL value given to vpp in the beginning. 515 * Also, check if this really was an error or the target was not 516 * present. Either treat it as a non-error for CREATE/RENAME or 517 * enter the component into the negative name cache (if desired). 518 */ 519 if (error) { 520 error = checkerr(pmp, error, __func__); 521 if (error == ENOENT) { 522 /* don't allow to create files on r/o fs */ 523 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 524 && cnp->cn_nameiop == CREATE) { 525 error = EROFS; 526 527 /* adjust values if we are creating */ 528 } else if ((cnp->cn_flags & ISLASTCN) 529 && (cnp->cn_nameiop == CREATE 530 || cnp->cn_nameiop == RENAME)) { 531 cnp->cn_flags |= SAVENAME; 532 error = EJUSTRETURN; 533 534 /* save negative cache entry */ 535 } else { 536 if ((cnp->cn_flags & MAKEENTRY) 537 && PUFFS_USE_NAMECACHE(pmp)) 538 cache_enter(dvp, NULL, cnp); 539 } 540 } 541 goto out; 542 } 543 544 /* 545 * Check that we don't get our parent node back, that would cause 546 * a pretty obvious deadlock. 547 */ 548 dpn = dvp->v_data; 549 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 550 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 551 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 552 error = EPROTO; 553 goto out; 554 } 555 556 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 1, 1, &vp); 557 if (error == PUFFS_NOSUCHCOOKIE) { 558 error = puffs_getvnode(dvp->v_mount, 559 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 560 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 561 if (error) { 562 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 563 lookup_msg->pvnr_newnode, ap->a_cnp); 564 goto out; 565 } 566 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 567 } else if (error) { 568 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 569 lookup_msg->pvnr_newnode, ap->a_cnp); 570 goto out; 571 } 572 573 *ap->a_vpp = vp; 574 575 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_USE_NAMECACHE(pmp)) 576 cache_enter(dvp, vp, cnp); 577 578 /* XXX */ 579 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 580 cnp->cn_flags &= ~REQUIREDIR; 581 if (lookup_msg->pvnr_cn.pkcn_consume) 582 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 583 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 584 585 /* 586 * We need the name in remove and rmdir (well, rename too, but 587 * SAVESTART takes care of that) 588 */ 589 if (cnp->cn_nameiop == DELETE) 590 cnp->cn_flags |= SAVENAME; 591 592 out: 593 if (cnp->cn_flags & ISDOTDOT) 594 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 595 596 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 597 PUFFS_MSG_RELEASE(lookup); 598 return error; 599 } 600 601 #define REFPN_AND_UNLOCKVP(a, b) \ 602 do { \ 603 mutex_enter(&b->pn_mtx); \ 604 puffs_referencenode(b); \ 605 mutex_exit(&b->pn_mtx); \ 606 VOP_UNLOCK(a, 0); \ 607 } while (/*CONSTCOND*/0) 608 609 #define REFPN(b) \ 610 do { \ 611 mutex_enter(&b->pn_mtx); \ 612 puffs_referencenode(b); \ 613 mutex_exit(&b->pn_mtx); \ 614 } while (/*CONSTCOND*/0) 615 616 #define RELEPN_AND_VP(a, b) \ 617 do { \ 618 puffs_releasenode(b); \ 619 vrele(a); \ 620 } while (/*CONSTCOND*/0) 621 622 int 623 puffs_vnop_create(void *v) 624 { 625 struct vop_create_args /* { 626 const struct vnodeop_desc *a_desc; 627 struct vnode *a_dvp; 628 struct vnode **a_vpp; 629 struct componentname *a_cnp; 630 struct vattr *a_vap; 631 } */ *ap = v; 632 PUFFS_MSG_VARS(vn, create); 633 struct vnode *dvp = ap->a_dvp; 634 struct puffs_node *dpn = VPTOPP(dvp); 635 struct componentname *cnp = ap->a_cnp; 636 struct mount *mp = dvp->v_mount; 637 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 638 int error; 639 640 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 641 dvp, ap->a_cnp->cn_nameptr)); 642 643 PUFFS_MSG_ALLOC(vn, create); 644 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 645 cnp, PUFFS_USE_FULLPNBUF(pmp)); 646 create_msg->pvnr_va = *ap->a_vap; 647 puffs_msg_setinfo(park_create, PUFFSOP_VN, 648 PUFFS_VN_CREATE, VPTOPNC(dvp)); 649 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 650 651 error = checkerr(pmp, error, __func__); 652 if (error) 653 goto out; 654 655 error = puffs_newnode(mp, dvp, ap->a_vpp, 656 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 657 if (error) 658 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 659 create_msg->pvnr_newnode, cnp); 660 661 out: 662 vput(dvp); 663 if (error || (cnp->cn_flags & SAVESTART) == 0) 664 PNBUF_PUT(cnp->cn_pnbuf); 665 666 DPRINTF(("puffs_create: return %d\n", error)); 667 PUFFS_MSG_RELEASE(create); 668 return error; 669 } 670 671 int 672 puffs_vnop_mknod(void *v) 673 { 674 struct vop_mknod_args /* { 675 const struct vnodeop_desc *a_desc; 676 struct vnode *a_dvp; 677 struct vnode **a_vpp; 678 struct componentname *a_cnp; 679 struct vattr *a_vap; 680 } */ *ap = v; 681 PUFFS_MSG_VARS(vn, mknod); 682 struct vnode *dvp = ap->a_dvp; 683 struct puffs_node *dpn = VPTOPP(dvp); 684 struct componentname *cnp = ap->a_cnp; 685 struct mount *mp = dvp->v_mount; 686 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 687 int error; 688 689 PUFFS_MSG_ALLOC(vn, mknod); 690 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 691 cnp, PUFFS_USE_FULLPNBUF(pmp)); 692 mknod_msg->pvnr_va = *ap->a_vap; 693 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 694 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 695 696 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 697 698 error = checkerr(pmp, error, __func__); 699 if (error) 700 goto out; 701 702 error = puffs_newnode(mp, dvp, ap->a_vpp, 703 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 704 ap->a_vap->va_rdev); 705 if (error) 706 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 707 mknod_msg->pvnr_newnode, cnp); 708 709 out: 710 vput(dvp); 711 PUFFS_MSG_RELEASE(mknod); 712 if (error || (cnp->cn_flags & SAVESTART) == 0) 713 PNBUF_PUT(cnp->cn_pnbuf); 714 return error; 715 } 716 717 int 718 puffs_vnop_open(void *v) 719 { 720 struct vop_open_args /* { 721 const struct vnodeop_desc *a_desc; 722 struct vnode *a_vp; 723 int a_mode; 724 kauth_cred_t a_cred; 725 } */ *ap = v; 726 PUFFS_MSG_VARS(vn, open); 727 struct vnode *vp = ap->a_vp; 728 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 729 int mode = ap->a_mode; 730 int error; 731 732 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 733 734 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 735 ERROUT(EROFS); 736 737 if (!EXISTSOP(pmp, OPEN)) 738 ERROUT(0); 739 740 PUFFS_MSG_ALLOC(vn, open); 741 open_msg->pvnr_mode = mode; 742 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 743 puffs_msg_setinfo(park_open, PUFFSOP_VN, 744 PUFFS_VN_OPEN, VPTOPNC(vp)); 745 746 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 747 error = checkerr(pmp, error, __func__); 748 749 out: 750 DPRINTF(("puffs_open: returning %d\n", error)); 751 PUFFS_MSG_RELEASE(open); 752 return error; 753 } 754 755 int 756 puffs_vnop_close(void *v) 757 { 758 struct vop_close_args /* { 759 const struct vnodeop_desc *a_desc; 760 struct vnode *a_vp; 761 int a_fflag; 762 kauth_cred_t a_cred; 763 } */ *ap = v; 764 PUFFS_MSG_VARS(vn, close); 765 struct vnode *vp = ap->a_vp; 766 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 767 768 PUFFS_MSG_ALLOC(vn, close); 769 puffs_msg_setfaf(park_close); 770 close_msg->pvnr_fflag = ap->a_fflag; 771 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 772 puffs_msg_setinfo(park_close, PUFFSOP_VN, 773 PUFFS_VN_CLOSE, VPTOPNC(vp)); 774 775 puffs_msg_enqueue(pmp, park_close); 776 PUFFS_MSG_RELEASE(close); 777 return 0; 778 } 779 780 int 781 puffs_vnop_access(void *v) 782 { 783 struct vop_access_args /* { 784 const struct vnodeop_desc *a_desc; 785 struct vnode *a_vp; 786 int a_mode; 787 kauth_cred_t a_cred; 788 } */ *ap = v; 789 PUFFS_MSG_VARS(vn, access); 790 struct vnode *vp = ap->a_vp; 791 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 792 int mode = ap->a_mode; 793 int error; 794 795 if (mode & VWRITE) { 796 switch (vp->v_type) { 797 case VDIR: 798 case VLNK: 799 case VREG: 800 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 801 || !EXISTSOP(pmp, WRITE)) 802 return EROFS; 803 break; 804 default: 805 break; 806 } 807 } 808 809 if (!EXISTSOP(pmp, ACCESS)) 810 return 0; 811 812 PUFFS_MSG_ALLOC(vn, access); 813 access_msg->pvnr_mode = ap->a_mode; 814 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 815 puffs_msg_setinfo(park_access, PUFFSOP_VN, 816 PUFFS_VN_ACCESS, VPTOPNC(vp)); 817 818 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 819 error = checkerr(pmp, error, __func__); 820 PUFFS_MSG_RELEASE(access); 821 822 return error; 823 } 824 825 int 826 puffs_vnop_getattr(void *v) 827 { 828 struct vop_getattr_args /* { 829 const struct vnodeop_desc *a_desc; 830 struct vnode *a_vp; 831 struct vattr *a_vap; 832 kauth_cred_t a_cred; 833 } */ *ap = v; 834 PUFFS_MSG_VARS(vn, getattr); 835 struct vnode *vp = ap->a_vp; 836 struct mount *mp = vp->v_mount; 837 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 838 struct vattr *vap, *rvap; 839 struct puffs_node *pn; 840 int error = 0; 841 842 vap = ap->a_vap; 843 844 PUFFS_MSG_ALLOC(vn, getattr); 845 vattr_null(&getattr_msg->pvnr_va); 846 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 847 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 848 PUFFS_VN_GETATTR, VPTOPNC(vp)); 849 850 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 851 error = checkerr(pmp, error, __func__); 852 if (error) 853 goto out; 854 855 rvap = &getattr_msg->pvnr_va; 856 /* 857 * Don't listen to the file server regarding special device 858 * size info, the file server doesn't know anything about them. 859 */ 860 if (vp->v_type == VBLK || vp->v_type == VCHR) 861 rvap->va_size = vp->v_size; 862 863 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 864 if (vp->v_type == VBLK) 865 rvap->va_blocksize = BLKDEV_IOSIZE; 866 else if (vp->v_type == VCHR) 867 rvap->va_blocksize = MAXBSIZE; 868 869 (void) memcpy(vap, rvap, sizeof(struct vattr)); 870 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 871 872 pn = VPTOPP(vp); 873 if (pn->pn_stat & PNODE_METACACHE_ATIME) 874 vap->va_atime = pn->pn_mc_atime; 875 if (pn->pn_stat & PNODE_METACACHE_CTIME) 876 vap->va_ctime = pn->pn_mc_ctime; 877 if (pn->pn_stat & PNODE_METACACHE_MTIME) 878 vap->va_mtime = pn->pn_mc_mtime; 879 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 880 vap->va_size = pn->pn_mc_size; 881 } else { 882 if (rvap->va_size != VNOVAL 883 && vp->v_type != VBLK && vp->v_type != VCHR) { 884 uvm_vnp_setsize(vp, rvap->va_size); 885 pn->pn_serversize = rvap->va_size; 886 } 887 } 888 889 out: 890 PUFFS_MSG_RELEASE(getattr); 891 return error; 892 } 893 894 static int 895 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int chsize) 896 { 897 PUFFS_MSG_VARS(vn, setattr); 898 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 899 struct puffs_node *pn = vp->v_data; 900 int error; 901 902 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 903 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 904 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 905 || vap->va_mode != (mode_t)VNOVAL)) 906 return EROFS; 907 908 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 909 && vp->v_type == VREG && vap->va_size != VNOVAL) 910 return EROFS; 911 912 /* 913 * Flush metacache first. If we are called with some explicit 914 * parameters, treat them as information overriding metacache 915 * information. 916 */ 917 if (pn->pn_stat & PNODE_METACACHE_MASK) { 918 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 919 && vap->va_atime.tv_sec == VNOVAL) 920 vap->va_atime = pn->pn_mc_atime; 921 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 922 && vap->va_ctime.tv_sec == VNOVAL) 923 vap->va_ctime = pn->pn_mc_ctime; 924 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 925 && vap->va_mtime.tv_sec == VNOVAL) 926 vap->va_mtime = pn->pn_mc_mtime; 927 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 928 && vap->va_size == VNOVAL) 929 vap->va_size = pn->pn_mc_size; 930 931 pn->pn_stat &= ~PNODE_METACACHE_MASK; 932 } 933 934 PUFFS_MSG_ALLOC(vn, setattr); 935 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 936 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 937 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 938 PUFFS_VN_SETATTR, VPTOPNC(vp)); 939 940 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setattr, vp->v_data, NULL, error); 941 PUFFS_MSG_RELEASE(setattr); 942 error = checkerr(pmp, error, __func__); 943 if (error) 944 return error; 945 946 if (vap->va_size != VNOVAL) { 947 pn->pn_serversize = vap->va_size; 948 if (chsize) 949 uvm_vnp_setsize(vp, vap->va_size); 950 } 951 952 return 0; 953 } 954 955 int 956 puffs_vnop_setattr(void *v) 957 { 958 struct vop_getattr_args /* { 959 const struct vnodeop_desc *a_desc; 960 struct vnode *a_vp; 961 struct vattr *a_vap; 962 kauth_cred_t a_cred; 963 } */ *ap = v; 964 965 return dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, 1); 966 } 967 968 static __inline int 969 doinact(struct puffs_mount *pmp, int iaflag) 970 { 971 972 if (EXISTSOP(pmp, INACTIVE)) 973 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 974 if (iaflag || ALLOPS(pmp)) 975 return 1; 976 else 977 return 0; 978 else 979 return 1; 980 else 981 return 0; 982 } 983 984 static void 985 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 986 { 987 int error; 988 PUFFS_MSG_VARS(vn, inactive); 989 990 if (doinact(pmp, iaflag)) { 991 PUFFS_MSG_ALLOC(vn, inactive); 992 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 993 PUFFS_VN_INACTIVE, ck); 994 995 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 996 PUFFS_MSG_RELEASE(inactive); 997 } 998 } 999 1000 /* XXX: callinactive can't setback */ 1001 int 1002 puffs_vnop_inactive(void *v) 1003 { 1004 struct vop_inactive_args /* { 1005 const struct vnodeop_desc *a_desc; 1006 struct vnode *a_vp; 1007 } */ *ap = v; 1008 PUFFS_MSG_VARS(vn, inactive); 1009 struct vnode *vp = ap->a_vp; 1010 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1011 struct puffs_node *pnode; 1012 int error; 1013 1014 pnode = vp->v_data; 1015 1016 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1017 PUFFS_MSG_ALLOC(vn, inactive); 1018 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1019 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1020 1021 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1022 NULL, error); 1023 PUFFS_MSG_RELEASE(inactive); 1024 } 1025 pnode->pn_stat &= ~PNODE_DOINACT; 1026 1027 /* 1028 * file server thinks it's gone? then don't be afraid care, 1029 * node's life was already all it would ever be 1030 */ 1031 if (pnode->pn_stat & PNODE_NOREFS) { 1032 pnode->pn_stat |= PNODE_DYING; 1033 *ap->a_recycle = true; 1034 } 1035 1036 VOP_UNLOCK(vp, 0); 1037 1038 return 0; 1039 } 1040 1041 static void 1042 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck) 1043 { 1044 PUFFS_MSG_VARS(vn, reclaim); 1045 1046 if (!EXISTSOP(pmp, RECLAIM)) 1047 return; 1048 1049 PUFFS_MSG_ALLOC(vn, reclaim); 1050 puffs_msg_setfaf(park_reclaim); 1051 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1052 1053 puffs_msg_enqueue(pmp, park_reclaim); 1054 PUFFS_MSG_RELEASE(reclaim); 1055 } 1056 1057 /* 1058 * always FAF, we don't really care if the server wants to fail to 1059 * reclaim the node or not 1060 */ 1061 int 1062 puffs_vnop_reclaim(void *v) 1063 { 1064 struct vop_reclaim_args /* { 1065 const struct vnodeop_desc *a_desc; 1066 struct vnode *a_vp; 1067 } */ *ap = v; 1068 struct vnode *vp = ap->a_vp; 1069 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1070 struct puffs_node *pnode = vp->v_data; 1071 bool notifyserver = true; 1072 1073 /* 1074 * first things first: check if someone is trying to reclaim the 1075 * root vnode. do not allow that to travel to userspace. 1076 * Note that we don't need to take the lock similarly to 1077 * puffs_root(), since there is only one of us. 1078 */ 1079 if (vp->v_vflag & VV_ROOT) { 1080 mutex_enter(&pmp->pmp_lock); 1081 KASSERT(pmp->pmp_root != NULL); 1082 pmp->pmp_root = NULL; 1083 mutex_exit(&pmp->pmp_lock); 1084 notifyserver = false; 1085 } 1086 1087 /* 1088 * purge info from kernel before issueing FAF, since we 1089 * don't really know when we'll get around to it after 1090 * that and someone might race us into node creation 1091 */ 1092 mutex_enter(&pmp->pmp_lock); 1093 LIST_REMOVE(pnode, pn_hashent); 1094 mutex_exit(&pmp->pmp_lock); 1095 if (PUFFS_USE_NAMECACHE(pmp)) 1096 cache_purge(vp); 1097 1098 if (notifyserver) 1099 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp)); 1100 1101 puffs_putvnode(vp); 1102 1103 return 0; 1104 } 1105 1106 #define CSIZE sizeof(**ap->a_cookies) 1107 int 1108 puffs_vnop_readdir(void *v) 1109 { 1110 struct vop_readdir_args /* { 1111 const struct vnodeop_desc *a_desc; 1112 struct vnode *a_vp; 1113 struct uio *a_uio; 1114 kauth_cred_t a_cred; 1115 int *a_eofflag; 1116 off_t **a_cookies; 1117 int *a_ncookies; 1118 } */ *ap = v; 1119 PUFFS_MSG_VARS(vn, readdir); 1120 struct vnode *vp = ap->a_vp; 1121 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1122 size_t argsize, tomove, cookiemem, cookiesmax; 1123 struct uio *uio = ap->a_uio; 1124 size_t howmuch, resid; 1125 int error; 1126 1127 /* 1128 * ok, so we need: resid + cookiemem = maxreq 1129 * => resid + cookiesize * (resid/minsize) = maxreq 1130 * => resid + cookiesize/minsize * resid = maxreq 1131 * => (cookiesize/minsize + 1) * resid = maxreq 1132 * => resid = maxreq / (cookiesize/minsize + 1) 1133 * 1134 * Since cookiesize <= minsize and we're not very big on floats, 1135 * we approximate that to be 1. Therefore: 1136 * 1137 * resid = maxreq / 2; 1138 * 1139 * Well, at least we didn't have to use differential equations 1140 * or the Gram-Schmidt process. 1141 * 1142 * (yes, I'm very afraid of this) 1143 */ 1144 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1145 1146 if (ap->a_cookies) { 1147 KASSERT(ap->a_ncookies != NULL); 1148 if (pmp->pmp_args.pa_fhsize == 0) 1149 return EOPNOTSUPP; 1150 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1151 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1152 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1153 } else { 1154 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1155 cookiesmax = 0; 1156 cookiemem = 0; 1157 } 1158 1159 argsize = sizeof(struct puffs_vnmsg_readdir); 1160 tomove = resid + cookiemem; 1161 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1162 (void *)&readdir_msg, 1); 1163 1164 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1165 readdir_msg->pvnr_offset = uio->uio_offset; 1166 readdir_msg->pvnr_resid = resid; 1167 readdir_msg->pvnr_ncookies = cookiesmax; 1168 readdir_msg->pvnr_eofflag = 0; 1169 readdir_msg->pvnr_dentoff = cookiemem; 1170 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1171 PUFFS_VN_READDIR, VPTOPNC(vp)); 1172 puffs_msg_setdelta(park_readdir, tomove); 1173 1174 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1175 error = checkerr(pmp, error, __func__); 1176 if (error) 1177 goto out; 1178 1179 /* userspace is cheating? */ 1180 if (readdir_msg->pvnr_resid > resid) { 1181 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1182 "resid grew", VPTOPNC(vp)); 1183 ERROUT(EPROTO); 1184 } 1185 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1186 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1187 "too many cookies", VPTOPNC(vp)); 1188 ERROUT(EPROTO); 1189 } 1190 1191 /* check eof */ 1192 if (readdir_msg->pvnr_eofflag) 1193 *ap->a_eofflag = 1; 1194 1195 /* bouncy-wouncy with the directory data */ 1196 howmuch = resid - readdir_msg->pvnr_resid; 1197 1198 /* force eof if no data was returned (getcwd() needs this) */ 1199 if (howmuch == 0) { 1200 *ap->a_eofflag = 1; 1201 goto out; 1202 } 1203 1204 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1205 if (error) 1206 goto out; 1207 1208 /* provide cookies to caller if so desired */ 1209 if (ap->a_cookies) { 1210 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1211 M_TEMP, M_WAITOK); 1212 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1213 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1214 *ap->a_ncookies*CSIZE); 1215 } 1216 1217 /* next readdir starts here */ 1218 uio->uio_offset = readdir_msg->pvnr_offset; 1219 1220 out: 1221 puffs_msgmem_release(park_readdir); 1222 return error; 1223 } 1224 #undef CSIZE 1225 1226 /* 1227 * poll works by consuming the bitmask in pn_revents. If there are 1228 * events available, poll returns immediately. If not, it issues a 1229 * poll to userspace, selrecords itself and returns with no available 1230 * events. When the file server returns, it executes puffs_parkdone_poll(), 1231 * where available events are added to the bitmask. selnotify() is 1232 * then also executed by that function causing us to enter here again 1233 * and hopefully find the missing bits (unless someone got them first, 1234 * in which case it starts all over again). 1235 */ 1236 int 1237 puffs_vnop_poll(void *v) 1238 { 1239 struct vop_poll_args /* { 1240 const struct vnodeop_desc *a_desc; 1241 struct vnode *a_vp; 1242 int a_events; 1243 } */ *ap = v; 1244 PUFFS_MSG_VARS(vn, poll); 1245 struct vnode *vp = ap->a_vp; 1246 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1247 struct puffs_node *pn = vp->v_data; 1248 int events, error; 1249 1250 if (EXISTSOP(pmp, POLL)) { 1251 mutex_enter(&pn->pn_mtx); 1252 events = pn->pn_revents & ap->a_events; 1253 if (events & ap->a_events) { 1254 pn->pn_revents &= ~ap->a_events; 1255 mutex_exit(&pn->pn_mtx); 1256 1257 return events; 1258 } else { 1259 puffs_referencenode(pn); 1260 mutex_exit(&pn->pn_mtx); 1261 1262 PUFFS_MSG_ALLOC(vn, poll); 1263 poll_msg->pvnr_events = ap->a_events; 1264 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1265 PUFFS_VN_POLL, VPTOPNC(vp)); 1266 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1267 selrecord(curlwp, &pn->pn_sel); 1268 1269 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1270 NULL, error); 1271 PUFFS_MSG_RELEASE(poll); 1272 1273 return 0; 1274 } 1275 } else { 1276 return genfs_poll(v); 1277 } 1278 } 1279 1280 int 1281 puffs_vnop_fsync(void *v) 1282 { 1283 struct vop_fsync_args /* { 1284 const struct vnodeop_desc *a_desc; 1285 struct vnode *a_vp; 1286 kauth_cred_t a_cred; 1287 int a_flags; 1288 off_t a_offlo; 1289 off_t a_offhi; 1290 } */ *ap = v; 1291 PUFFS_MSG_VARS(vn, fsync); 1292 struct vnode *vp = ap->a_vp; 1293 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1294 struct puffs_node *pn; 1295 struct vattr va; 1296 int pflags, error, dofaf; 1297 1298 pn = VPTOPP(vp); 1299 1300 /* flush out information from our metacache, see vop_setattr */ 1301 if (pn->pn_stat & PNODE_METACACHE_MASK 1302 && (pn->pn_stat & PNODE_DYING) == 0) { 1303 vattr_null(&va); 1304 error = VOP_SETATTR(vp, &va, FSCRED); 1305 if (error) 1306 return error; 1307 } 1308 1309 /* 1310 * flush pages to avoid being overly dirty 1311 */ 1312 pflags = PGO_CLEANIT; 1313 if (ap->a_flags & FSYNC_WAIT) 1314 pflags |= PGO_SYNCIO; 1315 mutex_enter(&vp->v_interlock); 1316 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1317 round_page(ap->a_offhi), pflags); 1318 if (error) 1319 return error; 1320 1321 /* 1322 * HELLO! We exit already here if the user server does not 1323 * support fsync OR if we should call fsync for a node which 1324 * has references neither in the kernel or the fs server. 1325 * Otherwise we continue to issue fsync() forward. 1326 */ 1327 if (!EXISTSOP(pmp, FSYNC) || (pn->pn_stat & PNODE_DYING)) 1328 return 0; 1329 1330 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1331 /* 1332 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1333 * only FAFs for those. Otherwise there's a danger of deadlock, 1334 * since the execution context here might be the user server 1335 * doing some operation on another fs, which in turn caused a 1336 * vnode to be reclaimed from the freelist for this fs. 1337 */ 1338 if (dofaf == 0) { 1339 mutex_enter(&vp->v_interlock); 1340 if (vp->v_iflag & VI_XLOCK) 1341 dofaf = 1; 1342 mutex_exit(&vp->v_interlock); 1343 } 1344 1345 PUFFS_MSG_ALLOC(vn, fsync); 1346 if (dofaf) 1347 puffs_msg_setfaf(park_fsync); 1348 1349 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1350 fsync_msg->pvnr_flags = ap->a_flags; 1351 fsync_msg->pvnr_offlo = ap->a_offlo; 1352 fsync_msg->pvnr_offhi = ap->a_offhi; 1353 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1354 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1355 1356 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1357 PUFFS_MSG_RELEASE(fsync); 1358 1359 error = checkerr(pmp, error, __func__); 1360 1361 return error; 1362 } 1363 1364 int 1365 puffs_vnop_seek(void *v) 1366 { 1367 struct vop_seek_args /* { 1368 const struct vnodeop_desc *a_desc; 1369 struct vnode *a_vp; 1370 off_t a_oldoff; 1371 off_t a_newoff; 1372 kauth_cred_t a_cred; 1373 } */ *ap = v; 1374 PUFFS_MSG_VARS(vn, seek); 1375 struct vnode *vp = ap->a_vp; 1376 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1377 int error; 1378 1379 PUFFS_MSG_ALLOC(vn, seek); 1380 seek_msg->pvnr_oldoff = ap->a_oldoff; 1381 seek_msg->pvnr_newoff = ap->a_newoff; 1382 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1383 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1384 PUFFS_VN_SEEK, VPTOPNC(vp)); 1385 1386 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1387 PUFFS_MSG_RELEASE(seek); 1388 return checkerr(pmp, error, __func__); 1389 } 1390 1391 static int 1392 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1393 struct componentname *cnp) 1394 { 1395 PUFFS_MSG_VARS(vn, remove); 1396 int error; 1397 1398 PUFFS_MSG_ALLOC(vn, remove); 1399 remove_msg->pvnr_cookie_targ = ck; 1400 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1401 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1402 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1403 1404 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1405 PUFFS_MSG_RELEASE(remove); 1406 1407 return checkerr(pmp, error, __func__); 1408 } 1409 1410 /* 1411 * XXX: can't use callremove now because can't catch setbacks with 1412 * it due to lack of a pnode argument. 1413 */ 1414 int 1415 puffs_vnop_remove(void *v) 1416 { 1417 struct vop_remove_args /* { 1418 const struct vnodeop_desc *a_desc; 1419 struct vnode *a_dvp; 1420 struct vnode *a_vp; 1421 struct componentname *a_cnp; 1422 } */ *ap = v; 1423 PUFFS_MSG_VARS(vn, remove); 1424 struct vnode *dvp = ap->a_dvp; 1425 struct vnode *vp = ap->a_vp; 1426 struct puffs_node *dpn = VPTOPP(dvp); 1427 struct puffs_node *pn = VPTOPP(vp); 1428 struct componentname *cnp = ap->a_cnp; 1429 struct mount *mp = dvp->v_mount; 1430 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1431 int error; 1432 1433 PUFFS_MSG_ALLOC(vn, remove); 1434 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1435 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1436 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1437 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1438 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1439 1440 puffs_msg_enqueue(pmp, park_remove); 1441 REFPN_AND_UNLOCKVP(dvp, dpn); 1442 if (dvp == vp) 1443 REFPN(pn); 1444 else 1445 REFPN_AND_UNLOCKVP(vp, pn); 1446 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1447 1448 PUFFS_MSG_RELEASE(remove); 1449 1450 RELEPN_AND_VP(dvp, dpn); 1451 RELEPN_AND_VP(vp, pn); 1452 1453 error = checkerr(pmp, error, __func__); 1454 if (error || (cnp->cn_flags & SAVESTART) == 0) 1455 PNBUF_PUT(cnp->cn_pnbuf); 1456 return error; 1457 } 1458 1459 int 1460 puffs_vnop_mkdir(void *v) 1461 { 1462 struct vop_mkdir_args /* { 1463 const struct vnodeop_desc *a_desc; 1464 struct vnode *a_dvp; 1465 struct vnode **a_vpp; 1466 struct componentname *a_cnp; 1467 struct vattr *a_vap; 1468 } */ *ap = v; 1469 PUFFS_MSG_VARS(vn, mkdir); 1470 struct vnode *dvp = ap->a_dvp; 1471 struct puffs_node *dpn = VPTOPP(dvp); 1472 struct componentname *cnp = ap->a_cnp; 1473 struct mount *mp = dvp->v_mount; 1474 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1475 int error; 1476 1477 PUFFS_MSG_ALLOC(vn, mkdir); 1478 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1479 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1480 mkdir_msg->pvnr_va = *ap->a_vap; 1481 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1482 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1483 1484 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1485 1486 error = checkerr(pmp, error, __func__); 1487 if (error) 1488 goto out; 1489 1490 error = puffs_newnode(mp, dvp, ap->a_vpp, 1491 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1492 if (error) 1493 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1494 mkdir_msg->pvnr_newnode, cnp); 1495 1496 out: 1497 vput(dvp); 1498 PUFFS_MSG_RELEASE(mkdir); 1499 if (error || (cnp->cn_flags & SAVESTART) == 0) 1500 PNBUF_PUT(cnp->cn_pnbuf); 1501 return error; 1502 } 1503 1504 static int 1505 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1506 struct componentname *cnp) 1507 { 1508 PUFFS_MSG_VARS(vn, rmdir); 1509 int error; 1510 1511 PUFFS_MSG_ALLOC(vn, rmdir); 1512 rmdir_msg->pvnr_cookie_targ = ck; 1513 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1514 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1515 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1516 1517 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1518 PUFFS_MSG_RELEASE(rmdir); 1519 1520 return checkerr(pmp, error, __func__); 1521 } 1522 1523 int 1524 puffs_vnop_rmdir(void *v) 1525 { 1526 struct vop_rmdir_args /* { 1527 const struct vnodeop_desc *a_desc; 1528 struct vnode *a_dvp; 1529 struct vnode *a_vp; 1530 struct componentname *a_cnp; 1531 } */ *ap = v; 1532 PUFFS_MSG_VARS(vn, rmdir); 1533 struct vnode *dvp = ap->a_dvp; 1534 struct vnode *vp = ap->a_vp; 1535 struct puffs_node *dpn = VPTOPP(dvp); 1536 struct puffs_node *pn = VPTOPP(vp); 1537 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1538 struct componentname *cnp = ap->a_cnp; 1539 int error; 1540 1541 PUFFS_MSG_ALLOC(vn, rmdir); 1542 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1543 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1544 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1545 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1546 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1547 1548 puffs_msg_enqueue(pmp, park_rmdir); 1549 REFPN_AND_UNLOCKVP(dvp, dpn); 1550 REFPN_AND_UNLOCKVP(vp, pn); 1551 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1552 1553 PUFFS_MSG_RELEASE(rmdir); 1554 1555 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1556 RELEPN_AND_VP(dvp, dpn); 1557 RELEPN_AND_VP(vp, pn); 1558 1559 if (error || (cnp->cn_flags & SAVESTART) == 0) 1560 PNBUF_PUT(cnp->cn_pnbuf); 1561 1562 return error; 1563 } 1564 1565 int 1566 puffs_vnop_link(void *v) 1567 { 1568 struct vop_link_args /* { 1569 const struct vnodeop_desc *a_desc; 1570 struct vnode *a_dvp; 1571 struct vnode *a_vp; 1572 struct componentname *a_cnp; 1573 } */ *ap = v; 1574 PUFFS_MSG_VARS(vn, link); 1575 struct vnode *dvp = ap->a_dvp; 1576 struct vnode *vp = ap->a_vp; 1577 struct puffs_node *dpn = VPTOPP(dvp); 1578 struct puffs_node *pn = VPTOPP(vp); 1579 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1580 struct componentname *cnp = ap->a_cnp; 1581 int error; 1582 1583 PUFFS_MSG_ALLOC(vn, link); 1584 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1585 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1586 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1587 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1588 PUFFS_VN_LINK, VPTOPNC(dvp)); 1589 1590 puffs_msg_enqueue(pmp, park_link); 1591 REFPN_AND_UNLOCKVP(dvp, dpn); 1592 REFPN(pn); 1593 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1594 1595 PUFFS_MSG_RELEASE(link); 1596 1597 error = checkerr(pmp, error, __func__); 1598 1599 /* 1600 * XXX: stay in touch with the cache. I don't like this, but 1601 * don't have a better solution either. See also puffs_rename(). 1602 */ 1603 if (error == 0) 1604 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1605 1606 PNBUF_PUT(cnp->cn_pnbuf); 1607 RELEPN_AND_VP(dvp, dpn); 1608 puffs_releasenode(pn); 1609 1610 return error; 1611 } 1612 1613 int 1614 puffs_vnop_symlink(void *v) 1615 { 1616 struct vop_symlink_args /* { 1617 const struct vnodeop_desc *a_desc; 1618 struct vnode *a_dvp; 1619 struct vnode **a_vpp; 1620 struct componentname *a_cnp; 1621 struct vattr *a_vap; 1622 char *a_target; 1623 } */ *ap = v; 1624 PUFFS_MSG_VARS(vn, symlink); 1625 struct vnode *dvp = ap->a_dvp; 1626 struct puffs_node *dpn = VPTOPP(dvp); 1627 struct mount *mp = dvp->v_mount; 1628 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1629 struct componentname *cnp = ap->a_cnp; 1630 int error; 1631 1632 *ap->a_vpp = NULL; 1633 1634 PUFFS_MSG_ALLOC(vn, symlink); 1635 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1636 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1637 symlink_msg->pvnr_va = *ap->a_vap; 1638 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1639 sizeof(symlink_msg->pvnr_link)); 1640 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1641 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1642 1643 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 1644 1645 error = checkerr(pmp, error, __func__); 1646 if (error) 1647 goto out; 1648 1649 error = puffs_newnode(mp, dvp, ap->a_vpp, 1650 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 1651 if (error) 1652 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 1653 symlink_msg->pvnr_newnode, cnp); 1654 1655 out: 1656 vput(dvp); 1657 PUFFS_MSG_RELEASE(symlink); 1658 if (error || (cnp->cn_flags & SAVESTART) == 0) 1659 PNBUF_PUT(cnp->cn_pnbuf); 1660 1661 return error; 1662 } 1663 1664 int 1665 puffs_vnop_readlink(void *v) 1666 { 1667 struct vop_readlink_args /* { 1668 const struct vnodeop_desc *a_desc; 1669 struct vnode *a_vp; 1670 struct uio *a_uio; 1671 kauth_cred_t a_cred; 1672 } */ *ap = v; 1673 PUFFS_MSG_VARS(vn, readlink); 1674 struct vnode *vp = ap->a_vp; 1675 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1676 size_t linklen; 1677 int error; 1678 1679 PUFFS_MSG_ALLOC(vn, readlink); 1680 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1681 linklen = sizeof(readlink_msg->pvnr_link); 1682 readlink_msg->pvnr_linklen = linklen; 1683 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1684 PUFFS_VN_READLINK, VPTOPNC(vp)); 1685 1686 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1687 error = checkerr(pmp, error, __func__); 1688 if (error) 1689 goto out; 1690 1691 /* bad bad user file server */ 1692 if (readlink_msg->pvnr_linklen > linklen) { 1693 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1694 "linklen too big", VPTOPNC(ap->a_vp)); 1695 error = EPROTO; 1696 goto out; 1697 } 1698 1699 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 1700 ap->a_uio); 1701 out: 1702 PUFFS_MSG_RELEASE(readlink); 1703 return error; 1704 } 1705 1706 int 1707 puffs_vnop_rename(void *v) 1708 { 1709 struct vop_rename_args /* { 1710 const struct vnodeop_desc *a_desc; 1711 struct vnode *a_fdvp; 1712 struct vnode *a_fvp; 1713 struct componentname *a_fcnp; 1714 struct vnode *a_tdvp; 1715 struct vnode *a_tvp; 1716 struct componentname *a_tcnp; 1717 } */ *ap = v; 1718 PUFFS_MSG_VARS(vn, rename); 1719 struct vnode *fdvp = ap->a_fdvp; 1720 struct puffs_node *fpn = ap->a_fvp->v_data; 1721 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 1722 int error; 1723 1724 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) 1725 ERROUT(EXDEV); 1726 1727 PUFFS_MSG_ALLOC(vn, rename); 1728 rename_msg->pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1729 rename_msg->pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1730 if (ap->a_tvp) 1731 rename_msg->pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1732 else 1733 rename_msg->pvnr_cookie_targ = NULL; 1734 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 1735 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1736 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 1737 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1738 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 1739 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 1740 1741 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 1742 error = checkerr(pmp, error, __func__); 1743 1744 /* 1745 * XXX: stay in touch with the cache. I don't like this, but 1746 * don't have a better solution either. See also puffs_link(). 1747 */ 1748 if (error == 0) 1749 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 1750 1751 out: 1752 PUFFS_MSG_RELEASE(rename); 1753 if (ap->a_tvp != NULL) 1754 vput(ap->a_tvp); 1755 if (ap->a_tdvp == ap->a_tvp) 1756 vrele(ap->a_tdvp); 1757 else 1758 vput(ap->a_tdvp); 1759 1760 vrele(ap->a_fdvp); 1761 vrele(ap->a_fvp); 1762 1763 return error; 1764 } 1765 1766 #define RWARGS(cont, iofl, move, offset, creds) \ 1767 (cont)->pvnr_ioflag = (iofl); \ 1768 (cont)->pvnr_resid = (move); \ 1769 (cont)->pvnr_offset = (offset); \ 1770 puffs_credcvt(&(cont)->pvnr_cred, creds) 1771 1772 int 1773 puffs_vnop_read(void *v) 1774 { 1775 struct vop_read_args /* { 1776 const struct vnodeop_desc *a_desc; 1777 struct vnode *a_vp; 1778 struct uio *a_uio; 1779 int a_ioflag; 1780 kauth_cred_t a_cred; 1781 } */ *ap = v; 1782 PUFFS_MSG_VARS(vn, read); 1783 struct vnode *vp = ap->a_vp; 1784 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1785 struct uio *uio = ap->a_uio; 1786 size_t tomove, argsize; 1787 vsize_t bytelen; 1788 int error; 1789 1790 read_msg = NULL; 1791 error = 0; 1792 1793 /* std sanity */ 1794 if (uio->uio_resid == 0) 1795 return 0; 1796 if (uio->uio_offset < 0) 1797 return EINVAL; 1798 1799 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1800 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1801 1802 while (uio->uio_resid > 0) { 1803 bytelen = MIN(uio->uio_resid, 1804 vp->v_size - uio->uio_offset); 1805 if (bytelen == 0) 1806 break; 1807 1808 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 1809 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 1810 if (error) 1811 break; 1812 } 1813 1814 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1815 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 1816 } else { 1817 /* 1818 * in case it's not a regular file or we're operating 1819 * uncached, do read in the old-fashioned style, 1820 * i.e. explicit read operations 1821 */ 1822 1823 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1824 argsize = sizeof(struct puffs_vnmsg_read); 1825 puffs_msgmem_alloc(argsize + tomove, &park_read, 1826 (void *)&read_msg, 1); 1827 1828 error = 0; 1829 while (uio->uio_resid > 0) { 1830 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1831 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 1832 RWARGS(read_msg, ap->a_ioflag, tomove, 1833 uio->uio_offset, ap->a_cred); 1834 puffs_msg_setinfo(park_read, PUFFSOP_VN, 1835 PUFFS_VN_READ, VPTOPNC(vp)); 1836 puffs_msg_setdelta(park_read, tomove); 1837 1838 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 1839 NULL, error); 1840 error = checkerr(pmp, error, __func__); 1841 if (error) 1842 break; 1843 1844 if (read_msg->pvnr_resid > tomove) { 1845 puffs_senderr(pmp, PUFFS_ERR_READ, 1846 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1847 error = EPROTO; 1848 break; 1849 } 1850 1851 error = uiomove(read_msg->pvnr_data, 1852 tomove - read_msg->pvnr_resid, uio); 1853 1854 /* 1855 * in case the file is out of juice, resid from 1856 * userspace is != 0. and the error-case is 1857 * quite obvious 1858 */ 1859 if (error || read_msg->pvnr_resid) 1860 break; 1861 } 1862 1863 puffs_msgmem_release(park_read); 1864 } 1865 1866 return error; 1867 } 1868 1869 /* 1870 * XXX: in case of a failure, this leaves uio in a bad state. 1871 * We could theoretically copy the uio and iovecs and "replay" 1872 * them the right amount after the userspace trip, but don't 1873 * bother for now. 1874 */ 1875 int 1876 puffs_vnop_write(void *v) 1877 { 1878 struct vop_write_args /* { 1879 const struct vnodeop_desc *a_desc; 1880 struct vnode *a_vp; 1881 struct uio *a_uio; 1882 int a_ioflag; 1883 kauth_cred_t a_cred; 1884 } */ *ap = v; 1885 PUFFS_MSG_VARS(vn, write); 1886 struct vnode *vp = ap->a_vp; 1887 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1888 struct uio *uio = ap->a_uio; 1889 size_t tomove, argsize; 1890 off_t oldoff, newoff, origoff; 1891 vsize_t bytelen; 1892 int error, uflags; 1893 int ubcflags; 1894 1895 error = uflags = 0; 1896 write_msg = NULL; 1897 1898 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1899 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 1900 1901 /* 1902 * userspace *should* be allowed to control this, 1903 * but with UBC it's a bit unclear how to handle it 1904 */ 1905 if (ap->a_ioflag & IO_APPEND) 1906 uio->uio_offset = vp->v_size; 1907 1908 origoff = uio->uio_offset; 1909 while (uio->uio_resid > 0) { 1910 uflags |= PUFFS_UPDATECTIME; 1911 uflags |= PUFFS_UPDATEMTIME; 1912 oldoff = uio->uio_offset; 1913 bytelen = uio->uio_resid; 1914 1915 newoff = oldoff + bytelen; 1916 if (vp->v_size < newoff) { 1917 uvm_vnp_setwritesize(vp, newoff); 1918 } 1919 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1920 UVM_ADV_RANDOM, ubcflags); 1921 1922 /* 1923 * In case of a ubc_uiomove() error, 1924 * opt to not extend the file at all and 1925 * return an error. Otherwise, if we attempt 1926 * to clear the memory we couldn't fault to, 1927 * we might generate a kernel page fault. 1928 */ 1929 if (vp->v_size < newoff) { 1930 if (error == 0) { 1931 uflags |= PUFFS_UPDATESIZE; 1932 uvm_vnp_setsize(vp, newoff); 1933 } else { 1934 uvm_vnp_setwritesize(vp, vp->v_size); 1935 } 1936 } 1937 if (error) 1938 break; 1939 1940 /* 1941 * If we're writing large files, flush to file server 1942 * every 64k. Otherwise we can very easily exhaust 1943 * kernel and user memory, as the file server cannot 1944 * really keep up with our writing speed. 1945 * 1946 * Note: this does *NOT* honor MNT_ASYNC, because 1947 * that gives userland too much say in the kernel. 1948 */ 1949 if (oldoff >> 16 != uio->uio_offset >> 16) { 1950 mutex_enter(&vp->v_interlock); 1951 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1952 uio->uio_offset & ~0xffff, 1953 PGO_CLEANIT | PGO_SYNCIO); 1954 if (error) 1955 break; 1956 } 1957 } 1958 1959 /* synchronous I/O? */ 1960 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1961 mutex_enter(&vp->v_interlock); 1962 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1963 round_page(uio->uio_offset), 1964 PGO_CLEANIT | PGO_SYNCIO); 1965 1966 /* write through page cache? */ 1967 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1968 mutex_enter(&vp->v_interlock); 1969 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1970 round_page(uio->uio_offset), PGO_CLEANIT); 1971 } 1972 1973 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 1974 } else { 1975 /* tomove is non-increasing */ 1976 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1977 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 1978 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 1979 1980 while (uio->uio_resid > 0) { 1981 /* move data to buffer */ 1982 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1983 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 1984 RWARGS(write_msg, ap->a_ioflag, tomove, 1985 uio->uio_offset, ap->a_cred); 1986 error = uiomove(write_msg->pvnr_data, tomove, uio); 1987 if (error) 1988 break; 1989 1990 /* move buffer to userspace */ 1991 puffs_msg_setinfo(park_write, PUFFSOP_VN, 1992 PUFFS_VN_WRITE, VPTOPNC(vp)); 1993 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 1994 NULL, error); 1995 error = checkerr(pmp, error, __func__); 1996 if (error) 1997 break; 1998 1999 if (write_msg->pvnr_resid > tomove) { 2000 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2001 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2002 error = EPROTO; 2003 break; 2004 } 2005 2006 /* adjust file size */ 2007 if (vp->v_size < uio->uio_offset) 2008 uvm_vnp_setsize(vp, uio->uio_offset); 2009 2010 /* didn't move everything? bad userspace. bail */ 2011 if (write_msg->pvnr_resid != 0) { 2012 error = EIO; 2013 break; 2014 } 2015 } 2016 puffs_msgmem_release(park_write); 2017 } 2018 2019 return error; 2020 } 2021 2022 int 2023 puffs_vnop_print(void *v) 2024 { 2025 struct vop_print_args /* { 2026 struct vnode *a_vp; 2027 } */ *ap = v; 2028 PUFFS_MSG_VARS(vn, print); 2029 struct vnode *vp = ap->a_vp; 2030 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2031 struct puffs_node *pn = vp->v_data; 2032 int error; 2033 2034 /* kernel portion */ 2035 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2036 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 2037 if (vp->v_type == VFIFO) 2038 fifo_printinfo(vp); 2039 2040 /* userspace portion */ 2041 if (EXISTSOP(pmp, PRINT)) { 2042 PUFFS_MSG_ALLOC(vn, print); 2043 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2044 PUFFS_VN_PRINT, VPTOPNC(vp)); 2045 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2046 NULL, error); 2047 PUFFS_MSG_RELEASE(print); 2048 } 2049 2050 return 0; 2051 } 2052 2053 int 2054 puffs_vnop_pathconf(void *v) 2055 { 2056 struct vop_pathconf_args /* { 2057 const struct vnodeop_desc *a_desc; 2058 struct vnode *a_vp; 2059 int a_name; 2060 register_t *a_retval; 2061 } */ *ap = v; 2062 PUFFS_MSG_VARS(vn, pathconf); 2063 struct vnode *vp = ap->a_vp; 2064 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2065 int error; 2066 2067 PUFFS_MSG_ALLOC(vn, pathconf); 2068 pathconf_msg->pvnr_name = ap->a_name; 2069 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2070 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2071 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2072 error = checkerr(pmp, error, __func__); 2073 if (!error) 2074 *ap->a_retval = pathconf_msg->pvnr_retval; 2075 PUFFS_MSG_RELEASE(pathconf); 2076 2077 return error; 2078 } 2079 2080 int 2081 puffs_vnop_advlock(void *v) 2082 { 2083 struct vop_advlock_args /* { 2084 const struct vnodeop_desc *a_desc; 2085 struct vnode *a_vp; 2086 void *a_id; 2087 int a_op; 2088 struct flock *a_fl; 2089 int a_flags; 2090 } */ *ap = v; 2091 PUFFS_MSG_VARS(vn, advlock); 2092 struct vnode *vp = ap->a_vp; 2093 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2094 int error; 2095 2096 PUFFS_MSG_ALLOC(vn, advlock); 2097 error = copyin(ap->a_fl, &advlock_msg->pvnr_fl, sizeof(struct flock)); 2098 if (error) 2099 goto out; 2100 advlock_msg->pvnr_id = ap->a_id; 2101 advlock_msg->pvnr_op = ap->a_op; 2102 advlock_msg->pvnr_flags = ap->a_flags; 2103 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2104 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2105 2106 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2107 error = checkerr(pmp, error, __func__); 2108 2109 out: 2110 PUFFS_MSG_RELEASE(advlock); 2111 return error; 2112 } 2113 2114 int 2115 puffs_vnop_abortop(void *v) 2116 { 2117 struct vop_abortop_args /* { 2118 struct vnode *a_dvp; 2119 struct componentname *a_cnp; 2120 }; */ *ap = v; 2121 PUFFS_MSG_VARS(vn, abortop); 2122 struct vnode *dvp = ap->a_dvp; 2123 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2124 struct componentname *cnp = ap->a_cnp; 2125 int error; 2126 2127 if (EXISTSOP(pmp, ABORTOP)) { 2128 PUFFS_MSG_ALLOC(vn, abortop); 2129 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2130 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2131 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2132 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2133 2134 PUFFS_MSG_ENQUEUEWAIT(pmp, park_abortop, error); 2135 PUFFS_MSG_RELEASE(abortop); 2136 } 2137 2138 return genfs_abortop(v); 2139 } 2140 2141 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2142 2143 /* 2144 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2145 */ 2146 int 2147 puffs_vnop_strategy(void *v) 2148 { 2149 struct vop_strategy_args /* { 2150 const struct vnodeop_desc *a_desc; 2151 struct vnode *a_vp; 2152 struct buf *a_bp; 2153 } */ *ap = v; 2154 PUFFS_MSG_VARS(vn, rw); 2155 struct vnode *vp = ap->a_vp; 2156 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2157 struct puffs_node *pn; 2158 struct buf *bp; 2159 size_t argsize; 2160 size_t tomove, moved; 2161 int error, dofaf, dobiodone; 2162 2163 pmp = MPTOPUFFSMP(vp->v_mount); 2164 bp = ap->a_bp; 2165 error = 0; 2166 dofaf = 0; 2167 pn = VPTOPP(vp); 2168 park_rw = NULL; /* explicit */ 2169 dobiodone = 1; 2170 2171 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2172 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2173 ERROUT(EOPNOTSUPP); 2174 2175 /* 2176 * Short-circuit optimization: don't flush buffer in between 2177 * VOP_INACTIVE and VOP_RECLAIM in case the node has no references. 2178 */ 2179 if (pn->pn_stat & PNODE_DYING) { 2180 KASSERT(BUF_ISWRITE(bp)); 2181 bp->b_resid = 0; 2182 goto out; 2183 } 2184 2185 #ifdef DIAGNOSTIC 2186 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2187 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2188 bp->b_bcount); 2189 #endif 2190 2191 /* 2192 * See explanation for the necessity of a FAF in puffs_fsync. 2193 * 2194 * Also, do FAF in case we're suspending. 2195 * See puffs_vfsops.c:pageflush() 2196 */ 2197 if (BUF_ISWRITE(bp)) { 2198 mutex_enter(&vp->v_interlock); 2199 if (vp->v_iflag & VI_XLOCK) 2200 dofaf = 1; 2201 if (pn->pn_stat & PNODE_SUSPEND) 2202 dofaf = 1; 2203 mutex_exit(&vp->v_interlock); 2204 } 2205 2206 #ifdef DIAGNOSTIC 2207 if (curlwp == uvm.pagedaemon_lwp) 2208 KASSERT(dofaf || BIOASYNC(bp)); 2209 #endif 2210 2211 /* allocate transport structure */ 2212 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2213 argsize = sizeof(struct puffs_vnmsg_rw); 2214 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2215 (void *)&rw_msg, dofaf ? 0 : 1); 2216 if (error) 2217 goto out; 2218 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2219 2220 /* 2x2 cases: read/write, faf/nofaf */ 2221 if (BUF_ISREAD(bp)) { 2222 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2223 PUFFS_VN_READ, VPTOPNC(vp)); 2224 puffs_msg_setdelta(park_rw, tomove); 2225 if (BIOASYNC(bp)) { 2226 puffs_msg_setcall(park_rw, 2227 puffs_parkdone_asyncbioread, bp); 2228 puffs_msg_enqueue(pmp, park_rw); 2229 dobiodone = 0; 2230 } else { 2231 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2232 NULL, error); 2233 error = checkerr(pmp, error, __func__); 2234 if (error) 2235 goto out; 2236 2237 if (rw_msg->pvnr_resid > tomove) { 2238 puffs_senderr(pmp, PUFFS_ERR_READ, 2239 E2BIG, "resid grew", VPTOPNC(vp)); 2240 ERROUT(EPROTO); 2241 } 2242 2243 moved = tomove - rw_msg->pvnr_resid; 2244 2245 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2246 bp->b_resid = bp->b_bcount - moved; 2247 } 2248 } else { 2249 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2250 PUFFS_VN_WRITE, VPTOPNC(vp)); 2251 /* 2252 * make pages read-only before we write them if we want 2253 * write caching info 2254 */ 2255 if (PUFFS_WCACHEINFO(pmp)) { 2256 struct uvm_object *uobj = &vp->v_uobj; 2257 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2258 struct vm_page *vmp; 2259 int i; 2260 2261 for (i = 0; i < npages; i++) { 2262 vmp= uvm_pageratop((vaddr_t)bp->b_data 2263 + (i << PAGE_SHIFT)); 2264 DPRINTF(("puffs_strategy: write-protecting " 2265 "vp %p page %p, offset %" PRId64"\n", 2266 vp, vmp, vmp->offset)); 2267 mutex_enter(&uobj->vmobjlock); 2268 vmp->flags |= PG_RDONLY; 2269 pmap_page_protect(vmp, VM_PROT_READ); 2270 mutex_exit(&uobj->vmobjlock); 2271 } 2272 } 2273 2274 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2275 if (dofaf) { 2276 puffs_msg_setfaf(park_rw); 2277 } else if (BIOASYNC(bp)) { 2278 puffs_msg_setcall(park_rw, 2279 puffs_parkdone_asyncbiowrite, bp); 2280 dobiodone = 0; 2281 } 2282 2283 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2284 2285 if (dobiodone == 0) 2286 goto out; 2287 2288 /* 2289 * XXXXXXXX: wrong, but kernel can't survive strategy 2290 * failure currently. Here, have one more X: X. 2291 */ 2292 if (error != ENOMEM) 2293 error = 0; 2294 2295 error = checkerr(pmp, error, __func__); 2296 if (error) 2297 goto out; 2298 2299 if (rw_msg->pvnr_resid > tomove) { 2300 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2301 E2BIG, "resid grew", VPTOPNC(vp)); 2302 ERROUT(EPROTO); 2303 } 2304 2305 /* 2306 * FAF moved everything. Frankly, we don't 2307 * really have a choice. 2308 */ 2309 if (dofaf && error == 0) 2310 moved = tomove; 2311 else 2312 moved = tomove - rw_msg->pvnr_resid; 2313 2314 bp->b_resid = bp->b_bcount - moved; 2315 if (bp->b_resid != 0) { 2316 ERROUT(EIO); 2317 } 2318 } 2319 2320 out: 2321 if (park_rw) 2322 puffs_msgmem_release(park_rw); 2323 2324 if (error) 2325 bp->b_error = error; 2326 2327 if (error || dobiodone) 2328 biodone(bp); 2329 2330 return error; 2331 } 2332 2333 int 2334 puffs_vnop_mmap(void *v) 2335 { 2336 struct vop_mmap_args /* { 2337 const struct vnodeop_desc *a_desc; 2338 struct vnode *a_vp; 2339 vm_prot_t a_prot; 2340 kauth_cred_t a_cred; 2341 } */ *ap = v; 2342 PUFFS_MSG_VARS(vn, mmap); 2343 struct vnode *vp = ap->a_vp; 2344 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2345 int error; 2346 2347 if (!PUFFS_USE_PAGECACHE(pmp)) 2348 return genfs_eopnotsupp(v); 2349 2350 if (EXISTSOP(pmp, MMAP)) { 2351 PUFFS_MSG_ALLOC(vn, mmap); 2352 mmap_msg->pvnr_prot = ap->a_prot; 2353 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2354 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2355 PUFFS_VN_MMAP, VPTOPNC(vp)); 2356 2357 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2358 error = checkerr(pmp, error, __func__); 2359 PUFFS_MSG_RELEASE(mmap); 2360 } else { 2361 error = genfs_mmap(v); 2362 } 2363 2364 return error; 2365 } 2366 2367 2368 /* 2369 * The rest don't get a free trip to userspace and back, they 2370 * have to stay within the kernel. 2371 */ 2372 2373 /* 2374 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2375 * well, maybe somehow, somewhere, some day .... 2376 */ 2377 int 2378 puffs_vnop_bmap(void *v) 2379 { 2380 struct vop_bmap_args /* { 2381 const struct vnodeop_desc *a_desc; 2382 struct vnode *a_vp; 2383 daddr_t a_bn; 2384 struct vnode **a_vpp; 2385 daddr_t *a_bnp; 2386 int *a_runp; 2387 } */ *ap = v; 2388 struct puffs_mount *pmp; 2389 2390 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2391 2392 if (ap->a_vpp) 2393 *ap->a_vpp = ap->a_vp; 2394 if (ap->a_bnp) 2395 *ap->a_bnp = ap->a_bn; 2396 if (ap->a_runp) 2397 *ap->a_runp 2398 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2399 2400 return 0; 2401 } 2402 2403 /* 2404 * Handle getpages faults in puffs. We let genfs_getpages() do most 2405 * of the dirty work, but we come in this route to do accounting tasks. 2406 * If the user server has specified functions for cache notifications 2407 * about reads and/or writes, we record which type of operation we got, 2408 * for which page range, and proceed to issue a FAF notification to the 2409 * server about it. 2410 */ 2411 int 2412 puffs_vnop_getpages(void *v) 2413 { 2414 struct vop_getpages_args /* { 2415 const struct vnodeop_desc *a_desc; 2416 struct vnode *a_vp; 2417 voff_t a_offset; 2418 struct vm_page **a_m; 2419 int *a_count; 2420 int a_centeridx; 2421 vm_prot_t a_access_type; 2422 int a_advice; 2423 int a_flags; 2424 } */ *ap = v; 2425 struct puffs_mount *pmp; 2426 struct puffs_node *pn; 2427 struct vnode *vp; 2428 struct vm_page **pgs; 2429 struct puffs_cacheinfo *pcinfo = NULL; 2430 struct puffs_cacherun *pcrun; 2431 void *parkmem = NULL; 2432 size_t runsizes; 2433 int i, npages, si, streakon; 2434 int error, locked, write; 2435 2436 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2437 npages = *ap->a_count; 2438 pgs = ap->a_m; 2439 vp = ap->a_vp; 2440 pn = vp->v_data; 2441 locked = (ap->a_flags & PGO_LOCKED) != 0; 2442 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2443 2444 /* ccg xnaht - gets Wuninitialized wrong */ 2445 pcrun = NULL; 2446 runsizes = 0; 2447 2448 /* 2449 * Check that we aren't trying to fault in pages which our file 2450 * server doesn't know about. This happens if we extend a file by 2451 * skipping some pages and later try to fault in pages which 2452 * are between pn_serversize and vp_size. This check optimizes 2453 * away the common case where a file is being extended. 2454 */ 2455 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2456 struct vattr va; 2457 2458 /* try again later when we can block */ 2459 if (locked) 2460 ERROUT(EBUSY); 2461 2462 mutex_exit(&vp->v_interlock); 2463 vattr_null(&va); 2464 va.va_size = vp->v_size; 2465 error = dosetattr(vp, &va, FSCRED, 0); 2466 if (error) 2467 ERROUT(error); 2468 mutex_enter(&vp->v_interlock); 2469 } 2470 2471 if (write && PUFFS_WCACHEINFO(pmp)) { 2472 #ifdef notnowjohn 2473 /* allocate worst-case memory */ 2474 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2475 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2476 locked ? KM_NOSLEEP : KM_SLEEP); 2477 2478 /* 2479 * can't block if we're locked and can't mess up caching 2480 * information for fs server. so come back later, please 2481 */ 2482 if (pcinfo == NULL) 2483 ERROUT(ENOMEM); 2484 2485 parkmem = puffs_park_alloc(locked == 0); 2486 if (parkmem == NULL) 2487 ERROUT(ENOMEM); 2488 2489 pcrun = pcinfo->pcache_runs; 2490 #else 2491 (void)parkmem; 2492 #endif 2493 } 2494 2495 error = genfs_getpages(v); 2496 if (error) 2497 goto out; 2498 2499 if (PUFFS_WCACHEINFO(pmp) == 0) 2500 goto out; 2501 2502 /* 2503 * Let's see whose fault it was and inform the user server of 2504 * possibly read/written pages. Map pages from read faults 2505 * strictly read-only, since otherwise we might miss info on 2506 * when the page is actually write-faulted to. 2507 */ 2508 if (!locked) 2509 mutex_enter(&vp->v_uobj.vmobjlock); 2510 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2511 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2512 if (streakon && write) { 2513 streakon = 0; 2514 pcrun[si].pcache_runend 2515 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2516 si++; 2517 } 2518 continue; 2519 } 2520 if (streakon == 0 && write) { 2521 streakon = 1; 2522 pcrun[si].pcache_runstart = pgs[i]->offset; 2523 } 2524 2525 if (!write) 2526 pgs[i]->flags |= PG_RDONLY; 2527 } 2528 /* was the last page part of our streak? */ 2529 if (streakon) { 2530 pcrun[si].pcache_runend 2531 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2532 si++; 2533 } 2534 if (!locked) 2535 mutex_exit(&vp->v_uobj.vmobjlock); 2536 2537 KASSERT(si <= (npages / 2) + 1); 2538 2539 #ifdef notnowjohn 2540 /* send results to userspace */ 2541 if (write) 2542 puffs_cacheop(pmp, parkmem, pcinfo, 2543 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2544 #endif 2545 2546 out: 2547 if (error) { 2548 if (pcinfo != NULL) 2549 kmem_free(pcinfo, 2550 sizeof(struct puffs_cacheinfo) + runsizes); 2551 #ifdef notnowjohn 2552 if (parkmem != NULL) 2553 puffs_park_release(parkmem, 1); 2554 #endif 2555 } 2556 2557 return error; 2558 } 2559 2560 int 2561 puffs_vnop_lock(void *v) 2562 { 2563 struct vop_lock_args /* { 2564 struct vnode *a_vp; 2565 int a_flags; 2566 } */ *ap = v; 2567 struct vnode *vp = ap->a_vp; 2568 struct mount *mp = vp->v_mount; 2569 int flags = ap->a_flags; 2570 2571 #if 0 2572 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2573 #endif 2574 2575 if (flags & LK_INTERLOCK) { 2576 mutex_exit(&vp->v_interlock); 2577 flags &= ~LK_INTERLOCK; 2578 } 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 return 0; 2593 } 2594 2595 return vlockmgr(&vp->v_lock, flags); 2596 } 2597 2598 int 2599 puffs_vnop_unlock(void *v) 2600 { 2601 struct vop_unlock_args /* { 2602 struct vnode *a_vp; 2603 int a_flags; 2604 } */ *ap = v; 2605 struct vnode *vp = ap->a_vp; 2606 struct mount *mp = vp->v_mount; 2607 2608 #if 0 2609 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2610 #endif 2611 2612 /* XXX: see puffs_lock() */ 2613 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2614 return 0; 2615 } 2616 2617 return vlockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE); 2618 } 2619 2620 int 2621 puffs_vnop_islocked(void *v) 2622 { 2623 struct vop_islocked_args *ap = v; 2624 int rv; 2625 2626 rv = vlockstatus(&ap->a_vp->v_lock); 2627 return rv; 2628 } 2629 2630 2631 /* 2632 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2633 * FAF update information for the puffs node first. 2634 */ 2635 int 2636 puffs_vnop_spec_read(void *v) 2637 { 2638 struct vop_read_args /* { 2639 const struct vnodeop_desc *a_desc; 2640 struct vnode *a_vp; 2641 struct uio *a_uio; 2642 int a_ioflag; 2643 kauth_cred_t a_cred; 2644 } */ *ap = v; 2645 2646 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2647 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2648 } 2649 2650 int 2651 puffs_vnop_spec_write(void *v) 2652 { 2653 struct vop_write_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(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2662 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2663 } 2664 2665 int 2666 puffs_vnop_fifo_read(void *v) 2667 { 2668 struct vop_read_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(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2677 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2678 } 2679 2680 int 2681 puffs_vnop_fifo_write(void *v) 2682 { 2683 struct vop_write_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(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2692 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2693 } 2694
Indexes created Tue Sep 30 20:09:53 GMT 2025