puffs_vnops.c revision 1.133
1 /* $NetBSD: puffs_vnops.c,v 1.133 2009/09/19 11:44:19 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 1.133 2009/09/19 11:44:19 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 86 int puffs_vnop_spec_read(void *); 87 int puffs_vnop_spec_write(void *); 88 int puffs_vnop_fifo_read(void *); 89 int puffs_vnop_fifo_write(void *); 90 91 int puffs_vnop_checkop(void *); 92 93 94 #if 0 95 #define puffs_lock genfs_lock 96 #define puffs_unlock genfs_unlock 97 #define puffs_islocked genfs_islocked 98 #else 99 int puffs_vnop_lock(void *); 100 int puffs_vnop_unlock(void *); 101 int puffs_vnop_islocked(void *); 102 #endif 103 104 int (**puffs_vnodeop_p)(void *); 105 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 106 { &vop_default_desc, vn_default_error }, 107 { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ 108 { &vop_create_desc, puffs_vnop_checkop }, /* create */ 109 { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ 110 { &vop_open_desc, puffs_vnop_open }, /* REAL open */ 111 { &vop_close_desc, puffs_vnop_checkop }, /* close */ 112 { &vop_access_desc, puffs_vnop_access }, /* REAL access */ 113 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 114 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 115 { &vop_read_desc, puffs_vnop_checkop }, /* read */ 116 { &vop_write_desc, puffs_vnop_checkop }, /* write */ 117 { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ 118 { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ 119 { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ 120 { &vop_link_desc, puffs_vnop_checkop }, /* link */ 121 { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ 122 { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ 123 { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ 124 { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ 125 { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ 126 { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ 127 { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ 128 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 129 { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ 130 { &vop_advlock_desc, puffs_vnop_checkop }, /* advlock */ 131 { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ 132 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 133 { &vop_abortop_desc, genfs_abortop }, /* REAL abortop */ 134 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 135 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 136 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 137 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 138 { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ 139 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 140 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 141 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 142 { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ 143 { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ 144 145 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 146 { NULL, NULL } 147 }; 148 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 149 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 150 151 152 int (**puffs_specop_p)(void *); 153 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 154 { &vop_default_desc, vn_default_error }, 155 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 156 { &vop_create_desc, spec_create }, /* genfs_badop */ 157 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 158 { &vop_open_desc, spec_open }, /* spec_open */ 159 { &vop_close_desc, spec_close }, /* spec_close */ 160 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 161 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 162 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 163 { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ 164 { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ 165 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 166 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 167 { &vop_poll_desc, spec_poll }, /* spec_poll */ 168 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 169 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 170 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 171 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 172 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 173 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 174 { &vop_link_desc, spec_link }, /* genfs_badop */ 175 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 176 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 177 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 178 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 179 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 180 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 181 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 182 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 183 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 184 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 185 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 186 { &vop_bmap_desc, spec_bmap }, /* dummy */ 187 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 188 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 189 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 190 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 191 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 192 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 193 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 194 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 195 #if 0 196 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 197 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 198 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 199 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 200 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 201 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 202 #endif 203 { NULL, NULL } 204 }; 205 const struct vnodeopv_desc puffs_specop_opv_desc = 206 { &puffs_specop_p, puffs_specop_entries }; 207 208 209 int (**puffs_fifoop_p)(void *); 210 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 211 { &vop_default_desc, vn_default_error }, 212 { &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */ 213 { &vop_create_desc, fifo_create }, /* genfs_badop */ 214 { &vop_mknod_desc, fifo_mknod }, /* genfs_badop */ 215 { &vop_open_desc, fifo_open }, /* open */ 216 { &vop_close_desc, fifo_close }, /* close */ 217 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 218 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 219 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 220 { &vop_read_desc, puffs_vnop_fifo_read }, /* read, update */ 221 { &vop_write_desc, puffs_vnop_fifo_write }, /* write, update */ 222 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 223 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 224 { &vop_poll_desc, fifo_poll }, /* poll */ 225 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 226 { &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */ 227 { &vop_mmap_desc, fifo_mmap }, /* genfs_badop */ 228 { &vop_fsync_desc, fifo_fsync }, /* genfs_nullop*/ 229 { &vop_seek_desc, fifo_seek }, /* genfs_badop */ 230 { &vop_remove_desc, fifo_remove }, /* genfs_badop */ 231 { &vop_link_desc, fifo_link }, /* genfs_badop */ 232 { &vop_rename_desc, fifo_rename }, /* genfs_badop */ 233 { &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */ 234 { &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */ 235 { &vop_symlink_desc, fifo_symlink }, /* genfs_badop */ 236 { &vop_readdir_desc, fifo_readdir }, /* genfs_badop */ 237 { &vop_readlink_desc, fifo_readlink }, /* genfs_badop */ 238 { &vop_abortop_desc, fifo_abortop }, /* genfs_badop */ 239 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 240 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 241 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 242 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 243 { &vop_bmap_desc, fifo_bmap }, /* dummy */ 244 { &vop_strategy_desc, fifo_strategy }, /* genfs_badop */ 245 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 246 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 247 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 248 { &vop_advlock_desc, fifo_advlock }, /* genfs_einval */ 249 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 250 { &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/ 251 #if 0 252 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 253 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 254 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 255 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 256 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 257 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 258 #endif 259 { NULL, NULL } 260 }; 261 const struct vnodeopv_desc puffs_fifoop_opv_desc = 262 { &puffs_fifoop_p, puffs_fifoop_entries }; 263 264 265 /* "real" vnode operations */ 266 int (**puffs_msgop_p)(void *); 267 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 268 { &vop_default_desc, vn_default_error }, 269 { &vop_create_desc, puffs_vnop_create }, /* create */ 270 { &vop_mknod_desc, puffs_vnop_mknod }, /* mknod */ 271 { &vop_open_desc, puffs_vnop_open }, /* open */ 272 { &vop_close_desc, puffs_vnop_close }, /* close */ 273 { &vop_access_desc, puffs_vnop_access }, /* access */ 274 { &vop_getattr_desc, puffs_vnop_getattr }, /* getattr */ 275 { &vop_setattr_desc, puffs_vnop_setattr }, /* setattr */ 276 { &vop_read_desc, puffs_vnop_read }, /* read */ 277 { &vop_write_desc, puffs_vnop_write }, /* write */ 278 { &vop_seek_desc, puffs_vnop_seek }, /* seek */ 279 { &vop_remove_desc, puffs_vnop_remove }, /* remove */ 280 { &vop_link_desc, puffs_vnop_link }, /* link */ 281 { &vop_rename_desc, puffs_vnop_rename }, /* rename */ 282 { &vop_mkdir_desc, puffs_vnop_mkdir }, /* mkdir */ 283 { &vop_rmdir_desc, puffs_vnop_rmdir }, /* rmdir */ 284 { &vop_symlink_desc, puffs_vnop_symlink }, /* symlink */ 285 { &vop_readdir_desc, puffs_vnop_readdir }, /* readdir */ 286 { &vop_readlink_desc, puffs_vnop_readlink }, /* readlink */ 287 { &vop_print_desc, puffs_vnop_print }, /* print */ 288 { &vop_islocked_desc, puffs_vnop_islocked }, /* islocked */ 289 { &vop_pathconf_desc, puffs_vnop_pathconf }, /* pathconf */ 290 { &vop_advlock_desc, puffs_vnop_advlock }, /* advlock */ 291 { &vop_getpages_desc, puffs_vnop_getpages }, /* getpages */ 292 { NULL, NULL } 293 }; 294 const struct vnodeopv_desc puffs_msgop_opv_desc = 295 { &puffs_msgop_p, puffs_msgop_entries }; 296 297 298 #define ERROUT(err) \ 299 do { \ 300 error = err; \ 301 goto out; \ 302 } while (/*CONSTCOND*/0) 303 304 /* 305 * This is a generic vnode operation handler. It checks if the necessary 306 * operations for the called vnode operation are implemented by userspace 307 * and either returns a dummy return value or proceeds to call the real 308 * vnode operation from puffs_msgop_v. 309 * 310 * XXX: this should described elsewhere and autogenerated, the complexity 311 * of the vnode operations vectors and their interrelationships is also 312 * getting a bit out of hand. Another problem is that we need this same 313 * information in the fs server code, so keeping the two in sync manually 314 * is not a viable (long term) plan. 315 */ 316 317 /* not supported, handle locking protocol */ 318 #define CHECKOP_NOTSUPP(op) \ 319 case VOP_##op##_DESCOFFSET: \ 320 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 321 return genfs_eopnotsupp(v); \ 322 break 323 324 /* always succeed, no locking */ 325 #define CHECKOP_SUCCESS(op) \ 326 case VOP_##op##_DESCOFFSET: \ 327 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 328 return 0; \ 329 break 330 331 int 332 puffs_vnop_checkop(void *v) 333 { 334 struct vop_generic_args /* { 335 struct vnodeop_desc *a_desc; 336 spooky mystery contents; 337 } */ *ap = v; 338 struct vnodeop_desc *desc = ap->a_desc; 339 struct puffs_mount *pmp; 340 struct vnode *vp; 341 int offset, rv; 342 343 offset = ap->a_desc->vdesc_vp_offsets[0]; 344 #ifdef DIAGNOSTIC 345 if (offset == VDESC_NO_OFFSET) 346 panic("puffs_checkop: no vnode, why did you call me?"); 347 #endif 348 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 349 pmp = MPTOPUFFSMP(vp->v_mount); 350 351 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 352 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 353 354 if (!ALLOPS(pmp)) { 355 switch (desc->vdesc_offset) { 356 CHECKOP_NOTSUPP(CREATE); 357 CHECKOP_NOTSUPP(MKNOD); 358 CHECKOP_NOTSUPP(GETATTR); 359 CHECKOP_NOTSUPP(SETATTR); 360 CHECKOP_NOTSUPP(READ); 361 CHECKOP_NOTSUPP(WRITE); 362 CHECKOP_NOTSUPP(FCNTL); 363 CHECKOP_NOTSUPP(IOCTL); 364 CHECKOP_NOTSUPP(REMOVE); 365 CHECKOP_NOTSUPP(LINK); 366 CHECKOP_NOTSUPP(RENAME); 367 CHECKOP_NOTSUPP(MKDIR); 368 CHECKOP_NOTSUPP(RMDIR); 369 CHECKOP_NOTSUPP(SYMLINK); 370 CHECKOP_NOTSUPP(READDIR); 371 CHECKOP_NOTSUPP(READLINK); 372 CHECKOP_NOTSUPP(PRINT); 373 CHECKOP_NOTSUPP(PATHCONF); 374 CHECKOP_NOTSUPP(ADVLOCK); 375 376 CHECKOP_SUCCESS(ACCESS); 377 CHECKOP_SUCCESS(CLOSE); 378 CHECKOP_SUCCESS(SEEK); 379 380 case VOP_GETPAGES_DESCOFFSET: 381 if (!EXISTSOP(pmp, READ)) 382 return genfs_eopnotsupp(v); 383 break; 384 385 default: 386 panic("puffs_checkop: unhandled vnop %d", 387 desc->vdesc_offset); 388 } 389 } 390 391 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 392 393 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 394 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 395 396 return rv; 397 } 398 399 static int callremove(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 400 struct componentname *); 401 static int callrmdir(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 402 struct componentname *); 403 static void callinactive(struct puffs_mount *, puffs_cookie_t, int); 404 static void callreclaim(struct puffs_mount *, puffs_cookie_t); 405 406 #define PUFFS_ABORT_LOOKUP 1 407 #define PUFFS_ABORT_CREATE 2 408 #define PUFFS_ABORT_MKNOD 3 409 #define PUFFS_ABORT_MKDIR 4 410 #define PUFFS_ABORT_SYMLINK 5 411 412 /* 413 * Press the pani^Wabort button! Kernel resource allocation failed. 414 */ 415 static void 416 puffs_abortbutton(struct puffs_mount *pmp, int what, 417 puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) 418 { 419 420 switch (what) { 421 case PUFFS_ABORT_CREATE: 422 case PUFFS_ABORT_MKNOD: 423 case PUFFS_ABORT_SYMLINK: 424 callremove(pmp, dck, ck, cnp); 425 break; 426 case PUFFS_ABORT_MKDIR: 427 callrmdir(pmp, dck, ck, cnp); 428 break; 429 } 430 431 callinactive(pmp, ck, 0); 432 callreclaim(pmp, ck); 433 } 434 435 /* 436 * Begin vnode operations. 437 * 438 * A word from the keymaster about locks: generally we don't want 439 * to use the vnode locks at all: it creates an ugly dependency between 440 * the userlandia file server and the kernel. But we'll play along with 441 * the kernel vnode locks for now. However, even currently we attempt 442 * to release locks as early as possible. This is possible for some 443 * operations which a) don't need a locked vnode after the userspace op 444 * and b) return with the vnode unlocked. Theoretically we could 445 * unlock-do op-lock for others and order the graph in userspace, but I 446 * don't want to think of the consequences for the time being. 447 */ 448 449 int 450 puffs_vnop_lookup(void *v) 451 { 452 struct vop_lookup_args /* { 453 const struct vnodeop_desc *a_desc; 454 struct vnode *a_dvp; 455 struct vnode **a_vpp; 456 struct componentname *a_cnp; 457 } */ *ap = v; 458 PUFFS_MSG_VARS(vn, lookup); 459 struct puffs_mount *pmp; 460 struct componentname *cnp; 461 struct vnode *vp, *dvp; 462 struct puffs_node *dpn; 463 int isdot; 464 int error; 465 466 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 467 cnp = ap->a_cnp; 468 dvp = ap->a_dvp; 469 *ap->a_vpp = NULL; 470 471 /* r/o fs? we check create later to handle EEXIST */ 472 if ((cnp->cn_flags & ISLASTCN) 473 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 474 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 475 return EROFS; 476 477 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 478 479 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 480 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 481 482 /* 483 * Check if someone fed it into the cache 484 */ 485 if (PUFFS_USE_NAMECACHE(pmp)) { 486 error = cache_lookup(dvp, ap->a_vpp, cnp); 487 488 if (error >= 0) 489 return error; 490 } 491 492 if (isdot) { 493 vp = ap->a_dvp; 494 vref(vp); 495 *ap->a_vpp = vp; 496 return 0; 497 } 498 499 PUFFS_MSG_ALLOC(vn, lookup); 500 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 501 cnp, PUFFS_USE_FULLPNBUF(pmp)); 502 503 if (cnp->cn_flags & ISDOTDOT) 504 VOP_UNLOCK(dvp, 0); 505 506 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 507 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 508 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 509 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 510 511 /* 512 * In case of error, there is no new vnode to play with, so be 513 * happy with the NULL value given to vpp in the beginning. 514 * Also, check if this really was an error or the target was not 515 * present. Either treat it as a non-error for CREATE/RENAME or 516 * enter the component into the negative name cache (if desired). 517 */ 518 if (error) { 519 error = checkerr(pmp, error, __func__); 520 if (error == ENOENT) { 521 /* don't allow to create files on r/o fs */ 522 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 523 && cnp->cn_nameiop == CREATE) { 524 error = EROFS; 525 526 /* adjust values if we are creating */ 527 } else if ((cnp->cn_flags & ISLASTCN) 528 && (cnp->cn_nameiop == CREATE 529 || cnp->cn_nameiop == RENAME)) { 530 cnp->cn_flags |= SAVENAME; 531 error = EJUSTRETURN; 532 533 /* save negative cache entry */ 534 } else { 535 if ((cnp->cn_flags & MAKEENTRY) 536 && PUFFS_USE_NAMECACHE(pmp)) 537 cache_enter(dvp, NULL, cnp); 538 } 539 } 540 goto out; 541 } 542 543 /* 544 * Check that we don't get our parent node back, that would cause 545 * a pretty obvious deadlock. 546 */ 547 dpn = dvp->v_data; 548 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 549 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 550 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 551 error = EPROTO; 552 goto out; 553 } 554 555 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 1, 1, &vp); 556 if (error == PUFFS_NOSUCHCOOKIE) { 557 error = puffs_getvnode(dvp->v_mount, 558 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 559 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 560 if (error) { 561 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 562 lookup_msg->pvnr_newnode, ap->a_cnp); 563 goto out; 564 } 565 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 566 } else if (error) { 567 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 568 lookup_msg->pvnr_newnode, ap->a_cnp); 569 goto out; 570 } 571 572 *ap->a_vpp = vp; 573 574 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_USE_NAMECACHE(pmp)) 575 cache_enter(dvp, vp, cnp); 576 577 /* XXX */ 578 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 579 cnp->cn_flags &= ~REQUIREDIR; 580 if (lookup_msg->pvnr_cn.pkcn_consume) 581 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 582 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 583 584 /* 585 * We need the name in remove and rmdir (well, rename too, but 586 * SAVESTART takes care of that) 587 */ 588 if (cnp->cn_nameiop == DELETE) 589 cnp->cn_flags |= SAVENAME; 590 591 out: 592 if (cnp->cn_flags & ISDOTDOT) 593 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 594 595 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 596 PUFFS_MSG_RELEASE(lookup); 597 return error; 598 } 599 600 #define REFPN_AND_UNLOCKVP(a, b) \ 601 do { \ 602 mutex_enter(&b->pn_mtx); \ 603 puffs_referencenode(b); \ 604 mutex_exit(&b->pn_mtx); \ 605 VOP_UNLOCK(a, 0); \ 606 } while (/*CONSTCOND*/0) 607 608 #define REFPN(b) \ 609 do { \ 610 mutex_enter(&b->pn_mtx); \ 611 puffs_referencenode(b); \ 612 mutex_exit(&b->pn_mtx); \ 613 } while (/*CONSTCOND*/0) 614 615 #define RELEPN_AND_VP(a, b) \ 616 do { \ 617 puffs_releasenode(b); \ 618 vrele(a); \ 619 } while (/*CONSTCOND*/0) 620 621 int 622 puffs_vnop_create(void *v) 623 { 624 struct vop_create_args /* { 625 const struct vnodeop_desc *a_desc; 626 struct vnode *a_dvp; 627 struct vnode **a_vpp; 628 struct componentname *a_cnp; 629 struct vattr *a_vap; 630 } */ *ap = v; 631 PUFFS_MSG_VARS(vn, create); 632 struct vnode *dvp = ap->a_dvp; 633 struct puffs_node *dpn = VPTOPP(dvp); 634 struct componentname *cnp = ap->a_cnp; 635 struct mount *mp = dvp->v_mount; 636 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 637 int error; 638 639 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 640 dvp, ap->a_cnp->cn_nameptr)); 641 642 PUFFS_MSG_ALLOC(vn, create); 643 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 644 cnp, PUFFS_USE_FULLPNBUF(pmp)); 645 create_msg->pvnr_va = *ap->a_vap; 646 puffs_msg_setinfo(park_create, PUFFSOP_VN, 647 PUFFS_VN_CREATE, VPTOPNC(dvp)); 648 649 /* 650 * Do the dance: 651 * + insert into queue ("interlock") 652 * + unlock vnode 653 * + wait for response 654 */ 655 puffs_msg_enqueue(pmp, park_create); 656 REFPN_AND_UNLOCKVP(dvp, dpn); 657 error = puffs_msg_wait2(pmp, park_create, dpn, NULL); 658 659 error = checkerr(pmp, error, __func__); 660 if (error) 661 goto out; 662 663 error = puffs_newnode(mp, dvp, ap->a_vpp, 664 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 665 if (error) 666 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 667 create_msg->pvnr_newnode, cnp); 668 669 out: 670 if (error || (cnp->cn_flags & SAVESTART) == 0) 671 PNBUF_PUT(cnp->cn_pnbuf); 672 673 RELEPN_AND_VP(dvp, dpn); 674 DPRINTF(("puffs_create: return %d\n", error)); 675 PUFFS_MSG_RELEASE(create); 676 return error; 677 } 678 679 int 680 puffs_vnop_mknod(void *v) 681 { 682 struct vop_mknod_args /* { 683 const struct vnodeop_desc *a_desc; 684 struct vnode *a_dvp; 685 struct vnode **a_vpp; 686 struct componentname *a_cnp; 687 struct vattr *a_vap; 688 } */ *ap = v; 689 PUFFS_MSG_VARS(vn, mknod); 690 struct vnode *dvp = ap->a_dvp; 691 struct puffs_node *dpn = VPTOPP(dvp); 692 struct componentname *cnp = ap->a_cnp; 693 struct mount *mp = dvp->v_mount; 694 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 695 int error; 696 697 PUFFS_MSG_ALLOC(vn, mknod); 698 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 699 cnp, PUFFS_USE_FULLPNBUF(pmp)); 700 mknod_msg->pvnr_va = *ap->a_vap; 701 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 702 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 703 704 puffs_msg_enqueue(pmp, park_mknod); 705 REFPN_AND_UNLOCKVP(dvp, dpn); 706 error = puffs_msg_wait2(pmp, park_mknod, dpn, NULL); 707 708 error = checkerr(pmp, error, __func__); 709 if (error) 710 goto out; 711 712 error = puffs_newnode(mp, dvp, ap->a_vpp, 713 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 714 ap->a_vap->va_rdev); 715 if (error) 716 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 717 mknod_msg->pvnr_newnode, cnp); 718 719 out: 720 PUFFS_MSG_RELEASE(mknod); 721 if (error || (cnp->cn_flags & SAVESTART) == 0) 722 PNBUF_PUT(cnp->cn_pnbuf); 723 RELEPN_AND_VP(dvp, dpn); 724 return error; 725 } 726 727 int 728 puffs_vnop_open(void *v) 729 { 730 struct vop_open_args /* { 731 const struct vnodeop_desc *a_desc; 732 struct vnode *a_vp; 733 int a_mode; 734 kauth_cred_t a_cred; 735 } */ *ap = v; 736 PUFFS_MSG_VARS(vn, open); 737 struct vnode *vp = ap->a_vp; 738 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 739 int mode = ap->a_mode; 740 int error; 741 742 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 743 744 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 745 ERROUT(EROFS); 746 747 if (!EXISTSOP(pmp, OPEN)) 748 ERROUT(0); 749 750 PUFFS_MSG_ALLOC(vn, open); 751 open_msg->pvnr_mode = mode; 752 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 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_vnop_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 } */ *ap = v; 774 PUFFS_MSG_VARS(vn, close); 775 struct vnode *vp = ap->a_vp; 776 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 777 778 PUFFS_MSG_ALLOC(vn, close); 779 puffs_msg_setfaf(park_close); 780 close_msg->pvnr_fflag = ap->a_fflag; 781 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 782 puffs_msg_setinfo(park_close, PUFFSOP_VN, 783 PUFFS_VN_CLOSE, VPTOPNC(vp)); 784 785 puffs_msg_enqueue(pmp, park_close); 786 PUFFS_MSG_RELEASE(close); 787 return 0; 788 } 789 790 int 791 puffs_vnop_access(void *v) 792 { 793 struct vop_access_args /* { 794 const struct vnodeop_desc *a_desc; 795 struct vnode *a_vp; 796 int a_mode; 797 kauth_cred_t a_cred; 798 } */ *ap = v; 799 PUFFS_MSG_VARS(vn, access); 800 struct vnode *vp = ap->a_vp; 801 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 802 int mode = ap->a_mode; 803 int error; 804 805 if (mode & VWRITE) { 806 switch (vp->v_type) { 807 case VDIR: 808 case VLNK: 809 case VREG: 810 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 811 || !EXISTSOP(pmp, WRITE)) 812 return EROFS; 813 break; 814 default: 815 break; 816 } 817 } 818 819 if (!EXISTSOP(pmp, ACCESS)) 820 return 0; 821 822 PUFFS_MSG_ALLOC(vn, access); 823 access_msg->pvnr_mode = ap->a_mode; 824 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 825 puffs_msg_setinfo(park_access, PUFFSOP_VN, 826 PUFFS_VN_ACCESS, VPTOPNC(vp)); 827 828 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 829 error = checkerr(pmp, error, __func__); 830 PUFFS_MSG_RELEASE(access); 831 832 return error; 833 } 834 835 int 836 puffs_vnop_getattr(void *v) 837 { 838 struct vop_getattr_args /* { 839 const struct vnodeop_desc *a_desc; 840 struct vnode *a_vp; 841 struct vattr *a_vap; 842 kauth_cred_t a_cred; 843 } */ *ap = v; 844 PUFFS_MSG_VARS(vn, getattr); 845 struct vnode *vp = ap->a_vp; 846 struct mount *mp = vp->v_mount; 847 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 848 struct vattr *vap, *rvap; 849 struct puffs_node *pn; 850 int error = 0; 851 852 vap = ap->a_vap; 853 854 PUFFS_MSG_ALLOC(vn, getattr); 855 vattr_null(&getattr_msg->pvnr_va); 856 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 857 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 858 PUFFS_VN_GETATTR, VPTOPNC(vp)); 859 860 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 861 error = checkerr(pmp, error, __func__); 862 if (error) 863 goto out; 864 865 rvap = &getattr_msg->pvnr_va; 866 /* 867 * Don't listen to the file server regarding special device 868 * size info, the file server doesn't know anything about them. 869 */ 870 if (vp->v_type == VBLK || vp->v_type == VCHR) 871 rvap->va_size = vp->v_size; 872 873 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 874 if (vp->v_type == VBLK) 875 rvap->va_blocksize = BLKDEV_IOSIZE; 876 else if (vp->v_type == VCHR) 877 rvap->va_blocksize = MAXBSIZE; 878 879 (void) memcpy(vap, rvap, sizeof(struct vattr)); 880 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 881 882 pn = VPTOPP(vp); 883 if (pn->pn_stat & PNODE_METACACHE_ATIME) 884 vap->va_atime = pn->pn_mc_atime; 885 if (pn->pn_stat & PNODE_METACACHE_CTIME) 886 vap->va_ctime = pn->pn_mc_ctime; 887 if (pn->pn_stat & PNODE_METACACHE_MTIME) 888 vap->va_mtime = pn->pn_mc_mtime; 889 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 890 vap->va_size = pn->pn_mc_size; 891 } else { 892 if (rvap->va_size != VNOVAL 893 && vp->v_type != VBLK && vp->v_type != VCHR) { 894 uvm_vnp_setsize(vp, rvap->va_size); 895 pn->pn_serversize = rvap->va_size; 896 } 897 } 898 899 out: 900 PUFFS_MSG_RELEASE(getattr); 901 return error; 902 } 903 904 static int 905 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int chsize) 906 { 907 PUFFS_MSG_VARS(vn, setattr); 908 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 909 struct puffs_node *pn = vp->v_data; 910 int error; 911 912 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 913 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 914 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 915 || vap->va_mode != (mode_t)VNOVAL)) 916 return EROFS; 917 918 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 919 && vp->v_type == VREG && vap->va_size != VNOVAL) 920 return EROFS; 921 922 /* 923 * Flush metacache first. If we are called with some explicit 924 * parameters, treat them as information overriding metacache 925 * information. 926 */ 927 if (pn->pn_stat & PNODE_METACACHE_MASK) { 928 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 929 && vap->va_atime.tv_sec == VNOVAL) 930 vap->va_atime = pn->pn_mc_atime; 931 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 932 && vap->va_ctime.tv_sec == VNOVAL) 933 vap->va_ctime = pn->pn_mc_ctime; 934 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 935 && vap->va_mtime.tv_sec == VNOVAL) 936 vap->va_mtime = pn->pn_mc_mtime; 937 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 938 && vap->va_size == VNOVAL) 939 vap->va_size = pn->pn_mc_size; 940 941 pn->pn_stat &= ~PNODE_METACACHE_MASK; 942 } 943 944 PUFFS_MSG_ALLOC(vn, setattr); 945 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 946 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 947 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 948 PUFFS_VN_SETATTR, VPTOPNC(vp)); 949 950 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setattr, vp->v_data, NULL, error); 951 PUFFS_MSG_RELEASE(setattr); 952 error = checkerr(pmp, error, __func__); 953 if (error) 954 return error; 955 956 if (vap->va_size != VNOVAL) { 957 pn->pn_serversize = vap->va_size; 958 if (chsize) 959 uvm_vnp_setsize(vp, vap->va_size); 960 } 961 962 return 0; 963 } 964 965 int 966 puffs_vnop_setattr(void *v) 967 { 968 struct vop_getattr_args /* { 969 const struct vnodeop_desc *a_desc; 970 struct vnode *a_vp; 971 struct vattr *a_vap; 972 kauth_cred_t a_cred; 973 } */ *ap = v; 974 975 return dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, 1); 976 } 977 978 static __inline int 979 doinact(struct puffs_mount *pmp, int iaflag) 980 { 981 982 if (EXISTSOP(pmp, INACTIVE)) 983 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 984 if (iaflag || ALLOPS(pmp)) 985 return 1; 986 else 987 return 0; 988 else 989 return 1; 990 else 991 return 0; 992 } 993 994 static void 995 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 996 { 997 int error; 998 PUFFS_MSG_VARS(vn, inactive); 999 1000 if (doinact(pmp, iaflag)) { 1001 PUFFS_MSG_ALLOC(vn, inactive); 1002 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1003 PUFFS_VN_INACTIVE, ck); 1004 1005 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 1006 PUFFS_MSG_RELEASE(inactive); 1007 } 1008 } 1009 1010 /* XXX: callinactive can't setback */ 1011 int 1012 puffs_vnop_inactive(void *v) 1013 { 1014 struct vop_inactive_args /* { 1015 const struct vnodeop_desc *a_desc; 1016 struct vnode *a_vp; 1017 } */ *ap = v; 1018 PUFFS_MSG_VARS(vn, inactive); 1019 struct vnode *vp = ap->a_vp; 1020 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1021 struct puffs_node *pnode; 1022 int error; 1023 1024 pnode = vp->v_data; 1025 1026 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1027 PUFFS_MSG_ALLOC(vn, inactive); 1028 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1029 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1030 1031 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1032 NULL, error); 1033 PUFFS_MSG_RELEASE(inactive); 1034 } 1035 pnode->pn_stat &= ~PNODE_DOINACT; 1036 1037 /* 1038 * file server thinks it's gone? then don't be afraid care, 1039 * node's life was already all it would ever be 1040 */ 1041 *ap->a_recycle = ((pnode->pn_stat & PNODE_NOREFS) != 0); 1042 1043 VOP_UNLOCK(vp, 0); 1044 1045 return 0; 1046 } 1047 1048 static void 1049 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck) 1050 { 1051 PUFFS_MSG_VARS(vn, reclaim); 1052 1053 if (!EXISTSOP(pmp, RECLAIM)) 1054 return; 1055 1056 PUFFS_MSG_ALLOC(vn, reclaim); 1057 puffs_msg_setfaf(park_reclaim); 1058 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1059 1060 puffs_msg_enqueue(pmp, park_reclaim); 1061 PUFFS_MSG_RELEASE(reclaim); 1062 } 1063 1064 /* 1065 * always FAF, we don't really care if the server wants to fail to 1066 * reclaim the node or not 1067 */ 1068 int 1069 puffs_vnop_reclaim(void *v) 1070 { 1071 struct vop_reclaim_args /* { 1072 const struct vnodeop_desc *a_desc; 1073 struct vnode *a_vp; 1074 } */ *ap = v; 1075 struct vnode *vp = ap->a_vp; 1076 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1077 1078 /* 1079 * first things first: check if someone is trying to reclaim the 1080 * root vnode. do not allow that to travel to userspace. 1081 * Note that we don't need to take the lock similarly to 1082 * puffs_root(), since there is only one of us. 1083 */ 1084 if (vp->v_vflag & VV_ROOT) { 1085 mutex_enter(&pmp->pmp_lock); 1086 KASSERT(pmp->pmp_root != NULL); 1087 pmp->pmp_root = NULL; 1088 mutex_exit(&pmp->pmp_lock); 1089 goto out; 1090 } 1091 1092 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp)); 1093 1094 out: 1095 if (PUFFS_USE_NAMECACHE(pmp)) 1096 cache_purge(vp); 1097 puffs_putvnode(vp); 1098 1099 return 0; 1100 } 1101 1102 #define CSIZE sizeof(**ap->a_cookies) 1103 int 1104 puffs_vnop_readdir(void *v) 1105 { 1106 struct vop_readdir_args /* { 1107 const struct vnodeop_desc *a_desc; 1108 struct vnode *a_vp; 1109 struct uio *a_uio; 1110 kauth_cred_t a_cred; 1111 int *a_eofflag; 1112 off_t **a_cookies; 1113 int *a_ncookies; 1114 } */ *ap = v; 1115 PUFFS_MSG_VARS(vn, readdir); 1116 struct vnode *vp = ap->a_vp; 1117 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1118 size_t argsize, tomove, cookiemem, cookiesmax; 1119 struct uio *uio = ap->a_uio; 1120 size_t howmuch, resid; 1121 int error; 1122 1123 /* 1124 * ok, so we need: resid + cookiemem = maxreq 1125 * => resid + cookiesize * (resid/minsize) = maxreq 1126 * => resid + cookiesize/minsize * resid = maxreq 1127 * => (cookiesize/minsize + 1) * resid = maxreq 1128 * => resid = maxreq / (cookiesize/minsize + 1) 1129 * 1130 * Since cookiesize <= minsize and we're not very big on floats, 1131 * we approximate that to be 1. Therefore: 1132 * 1133 * resid = maxreq / 2; 1134 * 1135 * Well, at least we didn't have to use differential equations 1136 * or the Gram-Schmidt process. 1137 * 1138 * (yes, I'm very afraid of this) 1139 */ 1140 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1141 1142 if (ap->a_cookies) { 1143 KASSERT(ap->a_ncookies != NULL); 1144 if (pmp->pmp_args.pa_fhsize == 0) 1145 return EOPNOTSUPP; 1146 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1147 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1148 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1149 } else { 1150 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1151 cookiesmax = 0; 1152 cookiemem = 0; 1153 } 1154 1155 argsize = sizeof(struct puffs_vnmsg_readdir); 1156 tomove = resid + cookiemem; 1157 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1158 (void *)&readdir_msg, 1); 1159 1160 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1161 readdir_msg->pvnr_offset = uio->uio_offset; 1162 readdir_msg->pvnr_resid = resid; 1163 readdir_msg->pvnr_ncookies = cookiesmax; 1164 readdir_msg->pvnr_eofflag = 0; 1165 readdir_msg->pvnr_dentoff = cookiemem; 1166 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1167 PUFFS_VN_READDIR, VPTOPNC(vp)); 1168 puffs_msg_setdelta(park_readdir, tomove); 1169 1170 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1171 error = checkerr(pmp, error, __func__); 1172 if (error) 1173 goto out; 1174 1175 /* userspace is cheating? */ 1176 if (readdir_msg->pvnr_resid > resid) { 1177 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1178 "resid grew", VPTOPNC(vp)); 1179 ERROUT(EPROTO); 1180 } 1181 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1182 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1183 "too many cookies", VPTOPNC(vp)); 1184 ERROUT(EPROTO); 1185 } 1186 1187 /* check eof */ 1188 if (readdir_msg->pvnr_eofflag) 1189 *ap->a_eofflag = 1; 1190 1191 /* bouncy-wouncy with the directory data */ 1192 howmuch = resid - readdir_msg->pvnr_resid; 1193 1194 /* force eof if no data was returned (getcwd() needs this) */ 1195 if (howmuch == 0) { 1196 *ap->a_eofflag = 1; 1197 goto out; 1198 } 1199 1200 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1201 if (error) 1202 goto out; 1203 1204 /* provide cookies to caller if so desired */ 1205 if (ap->a_cookies) { 1206 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1207 M_TEMP, M_WAITOK); 1208 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1209 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1210 *ap->a_ncookies*CSIZE); 1211 } 1212 1213 /* next readdir starts here */ 1214 uio->uio_offset = readdir_msg->pvnr_offset; 1215 1216 out: 1217 puffs_msgmem_release(park_readdir); 1218 return error; 1219 } 1220 #undef CSIZE 1221 1222 /* 1223 * poll works by consuming the bitmask in pn_revents. If there are 1224 * events available, poll returns immediately. If not, it issues a 1225 * poll to userspace, selrecords itself and returns with no available 1226 * events. When the file server returns, it executes puffs_parkdone_poll(), 1227 * where available events are added to the bitmask. selnotify() is 1228 * then also executed by that function causing us to enter here again 1229 * and hopefully find the missing bits (unless someone got them first, 1230 * in which case it starts all over again). 1231 */ 1232 int 1233 puffs_vnop_poll(void *v) 1234 { 1235 struct vop_poll_args /* { 1236 const struct vnodeop_desc *a_desc; 1237 struct vnode *a_vp; 1238 int a_events; 1239 } */ *ap = v; 1240 PUFFS_MSG_VARS(vn, poll); 1241 struct vnode *vp = ap->a_vp; 1242 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1243 struct puffs_node *pn = vp->v_data; 1244 int events, error; 1245 1246 if (EXISTSOP(pmp, POLL)) { 1247 mutex_enter(&pn->pn_mtx); 1248 events = pn->pn_revents & ap->a_events; 1249 if (events & ap->a_events) { 1250 pn->pn_revents &= ~ap->a_events; 1251 mutex_exit(&pn->pn_mtx); 1252 1253 return events; 1254 } else { 1255 puffs_referencenode(pn); 1256 mutex_exit(&pn->pn_mtx); 1257 1258 PUFFS_MSG_ALLOC(vn, poll); 1259 poll_msg->pvnr_events = ap->a_events; 1260 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1261 PUFFS_VN_POLL, VPTOPNC(vp)); 1262 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1263 selrecord(curlwp, &pn->pn_sel); 1264 1265 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1266 NULL, error); 1267 PUFFS_MSG_RELEASE(poll); 1268 1269 return 0; 1270 } 1271 } else { 1272 return genfs_poll(v); 1273 } 1274 } 1275 1276 int 1277 puffs_vnop_fsync(void *v) 1278 { 1279 struct vop_fsync_args /* { 1280 const struct vnodeop_desc *a_desc; 1281 struct vnode *a_vp; 1282 kauth_cred_t a_cred; 1283 int a_flags; 1284 off_t a_offlo; 1285 off_t a_offhi; 1286 } */ *ap = v; 1287 PUFFS_MSG_VARS(vn, fsync); 1288 struct vnode *vp = ap->a_vp; 1289 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1290 struct puffs_node *pn; 1291 struct vattr va; 1292 int pflags, error, dofaf; 1293 1294 pn = VPTOPP(vp); 1295 1296 /* flush out information from our metacache, see vop_setattr */ 1297 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1298 vattr_null(&va); 1299 error = VOP_SETATTR(vp, &va, FSCRED); 1300 if (error) 1301 return error; 1302 } 1303 1304 /* 1305 * flush pages to avoid being overly dirty 1306 */ 1307 pflags = PGO_CLEANIT; 1308 if (ap->a_flags & FSYNC_WAIT) 1309 pflags |= PGO_SYNCIO; 1310 mutex_enter(&vp->v_interlock); 1311 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1312 round_page(ap->a_offhi), pflags); 1313 if (error) 1314 return error; 1315 1316 /* 1317 * HELLO! We exit already here if the user server does not 1318 * support fsync OR if we should call fsync for a node which 1319 * has references neither in the kernel or the fs server. 1320 * Otherwise we continue to issue fsync() forward. 1321 */ 1322 if (!EXISTSOP(pmp, FSYNC)) 1323 return 0; 1324 1325 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1326 /* 1327 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1328 * only FAFs for those. Otherwise there's a danger of deadlock, 1329 * since the execution context here might be the user server 1330 * doing some operation on another fs, which in turn caused a 1331 * vnode to be reclaimed from the freelist for this fs. 1332 */ 1333 if (dofaf == 0) { 1334 mutex_enter(&vp->v_interlock); 1335 if (vp->v_iflag & VI_XLOCK) 1336 dofaf = 1; 1337 mutex_exit(&vp->v_interlock); 1338 } 1339 1340 PUFFS_MSG_ALLOC(vn, fsync); 1341 if (dofaf) 1342 puffs_msg_setfaf(park_fsync); 1343 1344 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1345 fsync_msg->pvnr_flags = ap->a_flags; 1346 fsync_msg->pvnr_offlo = ap->a_offlo; 1347 fsync_msg->pvnr_offhi = ap->a_offhi; 1348 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1349 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1350 1351 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1352 PUFFS_MSG_RELEASE(fsync); 1353 1354 error = checkerr(pmp, error, __func__); 1355 1356 return error; 1357 } 1358 1359 int 1360 puffs_vnop_seek(void *v) 1361 { 1362 struct vop_seek_args /* { 1363 const struct vnodeop_desc *a_desc; 1364 struct vnode *a_vp; 1365 off_t a_oldoff; 1366 off_t a_newoff; 1367 kauth_cred_t a_cred; 1368 } */ *ap = v; 1369 PUFFS_MSG_VARS(vn, seek); 1370 struct vnode *vp = ap->a_vp; 1371 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1372 int error; 1373 1374 PUFFS_MSG_ALLOC(vn, seek); 1375 seek_msg->pvnr_oldoff = ap->a_oldoff; 1376 seek_msg->pvnr_newoff = ap->a_newoff; 1377 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1378 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1379 PUFFS_VN_SEEK, VPTOPNC(vp)); 1380 1381 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1382 PUFFS_MSG_RELEASE(seek); 1383 return checkerr(pmp, error, __func__); 1384 } 1385 1386 static int 1387 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1388 struct componentname *cnp) 1389 { 1390 PUFFS_MSG_VARS(vn, remove); 1391 int error; 1392 1393 PUFFS_MSG_ALLOC(vn, remove); 1394 remove_msg->pvnr_cookie_targ = ck; 1395 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1396 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1397 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1398 1399 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1400 PUFFS_MSG_RELEASE(remove); 1401 1402 return checkerr(pmp, error, __func__); 1403 } 1404 1405 /* 1406 * XXX: can't use callremove now because can't catch setbacks with 1407 * it due to lack of a pnode argument. 1408 */ 1409 int 1410 puffs_vnop_remove(void *v) 1411 { 1412 struct vop_remove_args /* { 1413 const struct vnodeop_desc *a_desc; 1414 struct vnode *a_dvp; 1415 struct vnode *a_vp; 1416 struct componentname *a_cnp; 1417 } */ *ap = v; 1418 PUFFS_MSG_VARS(vn, remove); 1419 struct vnode *dvp = ap->a_dvp; 1420 struct vnode *vp = ap->a_vp; 1421 struct puffs_node *dpn = VPTOPP(dvp); 1422 struct puffs_node *pn = VPTOPP(vp); 1423 struct componentname *cnp = ap->a_cnp; 1424 struct mount *mp = dvp->v_mount; 1425 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1426 int error; 1427 1428 PUFFS_MSG_ALLOC(vn, remove); 1429 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1430 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1431 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1432 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1433 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1434 1435 puffs_msg_enqueue(pmp, park_remove); 1436 REFPN_AND_UNLOCKVP(dvp, dpn); 1437 if (dvp == vp) 1438 REFPN(pn); 1439 else 1440 REFPN_AND_UNLOCKVP(vp, pn); 1441 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1442 1443 PUFFS_MSG_RELEASE(remove); 1444 1445 RELEPN_AND_VP(dvp, dpn); 1446 RELEPN_AND_VP(vp, pn); 1447 1448 error = checkerr(pmp, error, __func__); 1449 if (error || (cnp->cn_flags & SAVESTART) == 0) 1450 PNBUF_PUT(cnp->cn_pnbuf); 1451 return error; 1452 } 1453 1454 int 1455 puffs_vnop_mkdir(void *v) 1456 { 1457 struct vop_mkdir_args /* { 1458 const struct vnodeop_desc *a_desc; 1459 struct vnode *a_dvp; 1460 struct vnode **a_vpp; 1461 struct componentname *a_cnp; 1462 struct vattr *a_vap; 1463 } */ *ap = v; 1464 PUFFS_MSG_VARS(vn, mkdir); 1465 struct vnode *dvp = ap->a_dvp; 1466 struct puffs_node *dpn = VPTOPP(dvp); 1467 struct componentname *cnp = ap->a_cnp; 1468 struct mount *mp = dvp->v_mount; 1469 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1470 int error; 1471 1472 PUFFS_MSG_ALLOC(vn, mkdir); 1473 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1474 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1475 mkdir_msg->pvnr_va = *ap->a_vap; 1476 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1477 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1478 1479 puffs_msg_enqueue(pmp, park_mkdir); 1480 REFPN_AND_UNLOCKVP(dvp, dpn); 1481 error = puffs_msg_wait2(pmp, park_mkdir, dpn, NULL); 1482 1483 error = checkerr(pmp, error, __func__); 1484 if (error) 1485 goto out; 1486 1487 error = puffs_newnode(mp, dvp, ap->a_vpp, 1488 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1489 if (error) 1490 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1491 mkdir_msg->pvnr_newnode, cnp); 1492 1493 out: 1494 PUFFS_MSG_RELEASE(mkdir); 1495 if (error || (cnp->cn_flags & SAVESTART) == 0) 1496 PNBUF_PUT(cnp->cn_pnbuf); 1497 RELEPN_AND_VP(dvp, dpn); 1498 return error; 1499 } 1500 1501 static int 1502 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1503 struct componentname *cnp) 1504 { 1505 PUFFS_MSG_VARS(vn, rmdir); 1506 int error; 1507 1508 PUFFS_MSG_ALLOC(vn, rmdir); 1509 rmdir_msg->pvnr_cookie_targ = ck; 1510 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1511 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1512 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1513 1514 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1515 PUFFS_MSG_RELEASE(rmdir); 1516 1517 return checkerr(pmp, error, __func__); 1518 } 1519 1520 int 1521 puffs_vnop_rmdir(void *v) 1522 { 1523 struct vop_rmdir_args /* { 1524 const struct vnodeop_desc *a_desc; 1525 struct vnode *a_dvp; 1526 struct vnode *a_vp; 1527 struct componentname *a_cnp; 1528 } */ *ap = v; 1529 PUFFS_MSG_VARS(vn, rmdir); 1530 struct vnode *dvp = ap->a_dvp; 1531 struct vnode *vp = ap->a_vp; 1532 struct puffs_node *dpn = VPTOPP(dvp); 1533 struct puffs_node *pn = VPTOPP(vp); 1534 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1535 struct componentname *cnp = ap->a_cnp; 1536 int error; 1537 1538 PUFFS_MSG_ALLOC(vn, rmdir); 1539 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1540 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1541 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1542 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1543 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1544 1545 puffs_msg_enqueue(pmp, park_rmdir); 1546 REFPN_AND_UNLOCKVP(dvp, dpn); 1547 REFPN_AND_UNLOCKVP(vp, pn); 1548 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1549 1550 PUFFS_MSG_RELEASE(rmdir); 1551 1552 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1553 RELEPN_AND_VP(dvp, dpn); 1554 RELEPN_AND_VP(vp, pn); 1555 1556 if (error || (cnp->cn_flags & SAVESTART) == 0) 1557 PNBUF_PUT(cnp->cn_pnbuf); 1558 1559 return error; 1560 } 1561 1562 int 1563 puffs_vnop_link(void *v) 1564 { 1565 struct vop_link_args /* { 1566 const struct vnodeop_desc *a_desc; 1567 struct vnode *a_dvp; 1568 struct vnode *a_vp; 1569 struct componentname *a_cnp; 1570 } */ *ap = v; 1571 PUFFS_MSG_VARS(vn, link); 1572 struct vnode *dvp = ap->a_dvp; 1573 struct vnode *vp = ap->a_vp; 1574 struct puffs_node *dpn = VPTOPP(dvp); 1575 struct puffs_node *pn = VPTOPP(vp); 1576 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1577 struct componentname *cnp = ap->a_cnp; 1578 int error; 1579 1580 PUFFS_MSG_ALLOC(vn, link); 1581 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1582 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1583 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1584 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1585 PUFFS_VN_LINK, VPTOPNC(dvp)); 1586 1587 puffs_msg_enqueue(pmp, park_link); 1588 REFPN_AND_UNLOCKVP(dvp, dpn); 1589 REFPN(pn); 1590 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1591 1592 PUFFS_MSG_RELEASE(link); 1593 1594 error = checkerr(pmp, error, __func__); 1595 1596 /* 1597 * XXX: stay in touch with the cache. I don't like this, but 1598 * don't have a better solution either. See also puffs_rename(). 1599 */ 1600 if (error == 0) 1601 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1602 1603 PNBUF_PUT(cnp->cn_pnbuf); 1604 RELEPN_AND_VP(dvp, dpn); 1605 puffs_releasenode(pn); 1606 1607 return error; 1608 } 1609 1610 int 1611 puffs_vnop_symlink(void *v) 1612 { 1613 struct vop_symlink_args /* { 1614 const struct vnodeop_desc *a_desc; 1615 struct vnode *a_dvp; 1616 struct vnode **a_vpp; 1617 struct componentname *a_cnp; 1618 struct vattr *a_vap; 1619 char *a_target; 1620 } */ *ap = v; 1621 PUFFS_MSG_VARS(vn, symlink); 1622 struct vnode *dvp = ap->a_dvp; 1623 struct puffs_node *dpn = VPTOPP(dvp); 1624 struct mount *mp = dvp->v_mount; 1625 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1626 struct componentname *cnp = ap->a_cnp; 1627 int error; 1628 1629 *ap->a_vpp = NULL; 1630 1631 PUFFS_MSG_ALLOC(vn, symlink); 1632 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1633 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1634 symlink_msg->pvnr_va = *ap->a_vap; 1635 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1636 sizeof(symlink_msg->pvnr_link)); 1637 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1638 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1639 1640 puffs_msg_enqueue(pmp, park_symlink); 1641 REFPN_AND_UNLOCKVP(dvp, dpn); 1642 error = puffs_msg_wait2(pmp, park_symlink, dpn, NULL); 1643 1644 error = checkerr(pmp, error, __func__); 1645 if (error) 1646 goto out; 1647 1648 error = puffs_newnode(mp, dvp, ap->a_vpp, 1649 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 1650 if (error) 1651 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 1652 symlink_msg->pvnr_newnode, cnp); 1653 1654 out: 1655 PUFFS_MSG_RELEASE(symlink); 1656 if (error || (cnp->cn_flags & SAVESTART) == 0) 1657 PNBUF_PUT(cnp->cn_pnbuf); 1658 RELEPN_AND_VP(dvp, dpn); 1659 1660 return error; 1661 } 1662 1663 int 1664 puffs_vnop_readlink(void *v) 1665 { 1666 struct vop_readlink_args /* { 1667 const struct vnodeop_desc *a_desc; 1668 struct vnode *a_vp; 1669 struct uio *a_uio; 1670 kauth_cred_t a_cred; 1671 } */ *ap = v; 1672 PUFFS_MSG_VARS(vn, readlink); 1673 struct vnode *vp = ap->a_vp; 1674 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1675 size_t linklen; 1676 int error; 1677 1678 PUFFS_MSG_ALLOC(vn, readlink); 1679 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1680 linklen = sizeof(readlink_msg->pvnr_link); 1681 readlink_msg->pvnr_linklen = linklen; 1682 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1683 PUFFS_VN_READLINK, VPTOPNC(vp)); 1684 1685 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1686 error = checkerr(pmp, error, __func__); 1687 if (error) 1688 goto out; 1689 1690 /* bad bad user file server */ 1691 if (readlink_msg->pvnr_linklen > linklen) { 1692 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1693 "linklen too big", VPTOPNC(ap->a_vp)); 1694 error = EPROTO; 1695 goto out; 1696 } 1697 1698 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 1699 ap->a_uio); 1700 out: 1701 PUFFS_MSG_RELEASE(readlink); 1702 return error; 1703 } 1704 1705 int 1706 puffs_vnop_rename(void *v) 1707 { 1708 struct vop_rename_args /* { 1709 const struct vnodeop_desc *a_desc; 1710 struct vnode *a_fdvp; 1711 struct vnode *a_fvp; 1712 struct componentname *a_fcnp; 1713 struct vnode *a_tdvp; 1714 struct vnode *a_tvp; 1715 struct componentname *a_tcnp; 1716 } */ *ap = v; 1717 PUFFS_MSG_VARS(vn, rename); 1718 struct vnode *fdvp = ap->a_fdvp; 1719 struct puffs_node *fpn = ap->a_fvp->v_data; 1720 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 1721 int error; 1722 1723 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) 1724 ERROUT(EXDEV); 1725 1726 PUFFS_MSG_ALLOC(vn, rename); 1727 rename_msg->pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1728 rename_msg->pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1729 if (ap->a_tvp) 1730 rename_msg->pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1731 else 1732 rename_msg->pvnr_cookie_targ = NULL; 1733 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 1734 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1735 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 1736 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1737 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 1738 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 1739 1740 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 1741 error = checkerr(pmp, error, __func__); 1742 1743 /* 1744 * XXX: stay in touch with the cache. I don't like this, but 1745 * don't have a better solution either. See also puffs_link(). 1746 */ 1747 if (error == 0) 1748 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 1749 1750 out: 1751 PUFFS_MSG_RELEASE(rename); 1752 if (ap->a_tvp != NULL) 1753 vput(ap->a_tvp); 1754 if (ap->a_tdvp == ap->a_tvp) 1755 vrele(ap->a_tdvp); 1756 else 1757 vput(ap->a_tdvp); 1758 1759 vrele(ap->a_fdvp); 1760 vrele(ap->a_fvp); 1761 1762 return error; 1763 } 1764 1765 #define RWARGS(cont, iofl, move, offset, creds) \ 1766 (cont)->pvnr_ioflag = (iofl); \ 1767 (cont)->pvnr_resid = (move); \ 1768 (cont)->pvnr_offset = (offset); \ 1769 puffs_credcvt(&(cont)->pvnr_cred, creds) 1770 1771 int 1772 puffs_vnop_read(void *v) 1773 { 1774 struct vop_read_args /* { 1775 const struct vnodeop_desc *a_desc; 1776 struct vnode *a_vp; 1777 struct uio *a_uio; 1778 int a_ioflag; 1779 kauth_cred_t a_cred; 1780 } */ *ap = v; 1781 PUFFS_MSG_VARS(vn, read); 1782 struct vnode *vp = ap->a_vp; 1783 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1784 struct uio *uio = ap->a_uio; 1785 size_t tomove, argsize; 1786 vsize_t bytelen; 1787 int error; 1788 1789 read_msg = NULL; 1790 error = 0; 1791 1792 /* std sanity */ 1793 if (uio->uio_resid == 0) 1794 return 0; 1795 if (uio->uio_offset < 0) 1796 return EINVAL; 1797 1798 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1799 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1800 1801 while (uio->uio_resid > 0) { 1802 bytelen = MIN(uio->uio_resid, 1803 vp->v_size - uio->uio_offset); 1804 if (bytelen == 0) 1805 break; 1806 1807 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 1808 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 1809 if (error) 1810 break; 1811 } 1812 1813 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1814 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 1815 } else { 1816 /* 1817 * in case it's not a regular file or we're operating 1818 * uncached, do read in the old-fashioned style, 1819 * i.e. explicit read operations 1820 */ 1821 1822 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1823 argsize = sizeof(struct puffs_vnmsg_read); 1824 puffs_msgmem_alloc(argsize + tomove, &park_read, 1825 (void *)&read_msg, 1); 1826 1827 error = 0; 1828 while (uio->uio_resid > 0) { 1829 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1830 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 1831 RWARGS(read_msg, ap->a_ioflag, tomove, 1832 uio->uio_offset, ap->a_cred); 1833 puffs_msg_setinfo(park_read, PUFFSOP_VN, 1834 PUFFS_VN_READ, VPTOPNC(vp)); 1835 puffs_msg_setdelta(park_read, tomove); 1836 1837 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 1838 NULL, error); 1839 error = checkerr(pmp, error, __func__); 1840 if (error) 1841 break; 1842 1843 if (read_msg->pvnr_resid > tomove) { 1844 puffs_senderr(pmp, PUFFS_ERR_READ, 1845 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1846 error = EPROTO; 1847 break; 1848 } 1849 1850 error = uiomove(read_msg->pvnr_data, 1851 tomove - read_msg->pvnr_resid, uio); 1852 1853 /* 1854 * in case the file is out of juice, resid from 1855 * userspace is != 0. and the error-case is 1856 * quite obvious 1857 */ 1858 if (error || read_msg->pvnr_resid) 1859 break; 1860 } 1861 1862 puffs_msgmem_release(park_read); 1863 } 1864 1865 return error; 1866 } 1867 1868 /* 1869 * XXX: in case of a failure, this leaves uio in a bad state. 1870 * We could theoretically copy the uio and iovecs and "replay" 1871 * them the right amount after the userspace trip, but don't 1872 * bother for now. 1873 */ 1874 int 1875 puffs_vnop_write(void *v) 1876 { 1877 struct vop_write_args /* { 1878 const struct vnodeop_desc *a_desc; 1879 struct vnode *a_vp; 1880 struct uio *a_uio; 1881 int a_ioflag; 1882 kauth_cred_t a_cred; 1883 } */ *ap = v; 1884 PUFFS_MSG_VARS(vn, write); 1885 struct vnode *vp = ap->a_vp; 1886 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1887 struct uio *uio = ap->a_uio; 1888 size_t tomove, argsize; 1889 off_t oldoff, newoff, origoff; 1890 vsize_t bytelen; 1891 int error, uflags; 1892 int ubcflags; 1893 1894 error = uflags = 0; 1895 write_msg = NULL; 1896 1897 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1898 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 1899 1900 /* 1901 * userspace *should* be allowed to control this, 1902 * but with UBC it's a bit unclear how to handle it 1903 */ 1904 if (ap->a_ioflag & IO_APPEND) 1905 uio->uio_offset = vp->v_size; 1906 1907 origoff = uio->uio_offset; 1908 while (uio->uio_resid > 0) { 1909 uflags |= PUFFS_UPDATECTIME; 1910 uflags |= PUFFS_UPDATEMTIME; 1911 oldoff = uio->uio_offset; 1912 bytelen = uio->uio_resid; 1913 1914 newoff = oldoff + bytelen; 1915 if (vp->v_size < newoff) { 1916 uvm_vnp_setwritesize(vp, newoff); 1917 } 1918 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1919 UVM_ADV_RANDOM, ubcflags); 1920 1921 /* 1922 * In case of a ubc_uiomove() error, 1923 * opt to not extend the file at all and 1924 * return an error. Otherwise, if we attempt 1925 * to clear the memory we couldn't fault to, 1926 * we might generate a kernel page fault. 1927 */ 1928 if (vp->v_size < newoff) { 1929 if (error == 0) { 1930 uflags |= PUFFS_UPDATESIZE; 1931 uvm_vnp_setsize(vp, newoff); 1932 } else { 1933 uvm_vnp_setwritesize(vp, vp->v_size); 1934 } 1935 } 1936 if (error) 1937 break; 1938 1939 /* 1940 * If we're writing large files, flush to file server 1941 * every 64k. Otherwise we can very easily exhaust 1942 * kernel and user memory, as the file server cannot 1943 * really keep up with our writing speed. 1944 * 1945 * Note: this does *NOT* honor MNT_ASYNC, because 1946 * that gives userland too much say in the kernel. 1947 */ 1948 if (oldoff >> 16 != uio->uio_offset >> 16) { 1949 mutex_enter(&vp->v_interlock); 1950 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1951 uio->uio_offset & ~0xffff, 1952 PGO_CLEANIT | PGO_SYNCIO); 1953 if (error) 1954 break; 1955 } 1956 } 1957 1958 /* synchronous I/O? */ 1959 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1960 mutex_enter(&vp->v_interlock); 1961 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1962 round_page(uio->uio_offset), 1963 PGO_CLEANIT | PGO_SYNCIO); 1964 1965 /* write through page cache? */ 1966 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1967 mutex_enter(&vp->v_interlock); 1968 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1969 round_page(uio->uio_offset), PGO_CLEANIT); 1970 } 1971 1972 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 1973 } else { 1974 /* tomove is non-increasing */ 1975 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1976 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 1977 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 1978 1979 while (uio->uio_resid > 0) { 1980 /* move data to buffer */ 1981 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1982 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 1983 RWARGS(write_msg, ap->a_ioflag, tomove, 1984 uio->uio_offset, ap->a_cred); 1985 error = uiomove(write_msg->pvnr_data, tomove, uio); 1986 if (error) 1987 break; 1988 1989 /* move buffer to userspace */ 1990 puffs_msg_setinfo(park_write, PUFFSOP_VN, 1991 PUFFS_VN_WRITE, VPTOPNC(vp)); 1992 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 1993 NULL, error); 1994 error = checkerr(pmp, error, __func__); 1995 if (error) 1996 break; 1997 1998 if (write_msg->pvnr_resid > tomove) { 1999 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2000 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 2001 error = EPROTO; 2002 break; 2003 } 2004 2005 /* adjust file size */ 2006 if (vp->v_size < uio->uio_offset) 2007 uvm_vnp_setsize(vp, uio->uio_offset); 2008 2009 /* didn't move everything? bad userspace. bail */ 2010 if (write_msg->pvnr_resid != 0) { 2011 error = EIO; 2012 break; 2013 } 2014 } 2015 puffs_msgmem_release(park_write); 2016 } 2017 2018 return error; 2019 } 2020 2021 int 2022 puffs_vnop_print(void *v) 2023 { 2024 struct vop_print_args /* { 2025 struct vnode *a_vp; 2026 } */ *ap = v; 2027 PUFFS_MSG_VARS(vn, print); 2028 struct vnode *vp = ap->a_vp; 2029 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2030 struct puffs_node *pn = vp->v_data; 2031 int error; 2032 2033 /* kernel portion */ 2034 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2035 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 2036 if (vp->v_type == VFIFO) 2037 fifo_printinfo(vp); 2038 2039 /* userspace portion */ 2040 if (EXISTSOP(pmp, PRINT)) { 2041 PUFFS_MSG_ALLOC(vn, print); 2042 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2043 PUFFS_VN_PRINT, VPTOPNC(vp)); 2044 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2045 NULL, error); 2046 PUFFS_MSG_RELEASE(print); 2047 } 2048 2049 return 0; 2050 } 2051 2052 int 2053 puffs_vnop_pathconf(void *v) 2054 { 2055 struct vop_pathconf_args /* { 2056 const struct vnodeop_desc *a_desc; 2057 struct vnode *a_vp; 2058 int a_name; 2059 register_t *a_retval; 2060 } */ *ap = v; 2061 PUFFS_MSG_VARS(vn, pathconf); 2062 struct vnode *vp = ap->a_vp; 2063 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2064 int error; 2065 2066 PUFFS_MSG_ALLOC(vn, pathconf); 2067 pathconf_msg->pvnr_name = ap->a_name; 2068 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2069 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2070 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2071 error = checkerr(pmp, error, __func__); 2072 if (!error) 2073 *ap->a_retval = pathconf_msg->pvnr_retval; 2074 PUFFS_MSG_RELEASE(pathconf); 2075 2076 return error; 2077 } 2078 2079 int 2080 puffs_vnop_advlock(void *v) 2081 { 2082 struct vop_advlock_args /* { 2083 const struct vnodeop_desc *a_desc; 2084 struct vnode *a_vp; 2085 void *a_id; 2086 int a_op; 2087 struct flock *a_fl; 2088 int a_flags; 2089 } */ *ap = v; 2090 PUFFS_MSG_VARS(vn, advlock); 2091 struct vnode *vp = ap->a_vp; 2092 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2093 int error; 2094 2095 PUFFS_MSG_ALLOC(vn, advlock); 2096 error = copyin(ap->a_fl, &advlock_msg->pvnr_fl, sizeof(struct flock)); 2097 if (error) 2098 goto out; 2099 advlock_msg->pvnr_id = ap->a_id; 2100 advlock_msg->pvnr_op = ap->a_op; 2101 advlock_msg->pvnr_flags = ap->a_flags; 2102 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2103 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2104 2105 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2106 error = checkerr(pmp, error, __func__); 2107 2108 out: 2109 PUFFS_MSG_RELEASE(advlock); 2110 return error; 2111 } 2112 2113 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2114 2115 /* 2116 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2117 */ 2118 int 2119 puffs_vnop_strategy(void *v) 2120 { 2121 struct vop_strategy_args /* { 2122 const struct vnodeop_desc *a_desc; 2123 struct vnode *a_vp; 2124 struct buf *a_bp; 2125 } */ *ap = v; 2126 PUFFS_MSG_VARS(vn, rw); 2127 struct vnode *vp = ap->a_vp; 2128 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2129 struct puffs_node *pn; 2130 struct buf *bp; 2131 size_t argsize; 2132 size_t tomove, moved; 2133 int error, dofaf, dobiodone; 2134 2135 pmp = MPTOPUFFSMP(vp->v_mount); 2136 bp = ap->a_bp; 2137 error = 0; 2138 dofaf = 0; 2139 pn = VPTOPP(vp); 2140 park_rw = NULL; /* explicit */ 2141 dobiodone = 1; 2142 2143 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2144 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2145 ERROUT(EOPNOTSUPP); 2146 2147 #ifdef DIAGNOSTIC 2148 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2149 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2150 bp->b_bcount); 2151 #endif 2152 2153 /* 2154 * See explanation for the necessity of a FAF in puffs_fsync. 2155 * 2156 * Also, do FAF in case we're suspending. 2157 * See puffs_vfsops.c:pageflush() 2158 */ 2159 if (BUF_ISWRITE(bp)) { 2160 mutex_enter(&vp->v_interlock); 2161 if (vp->v_iflag & VI_XLOCK) 2162 dofaf = 1; 2163 if (pn->pn_stat & PNODE_SUSPEND) 2164 dofaf = 1; 2165 mutex_exit(&vp->v_interlock); 2166 } 2167 2168 #ifdef DIAGNOSTIC 2169 if (curlwp == uvm.pagedaemon_lwp) 2170 KASSERT(dofaf || BIOASYNC(bp)); 2171 #endif 2172 2173 /* allocate transport structure */ 2174 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2175 argsize = sizeof(struct puffs_vnmsg_rw); 2176 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2177 (void *)&rw_msg, dofaf ? 0 : 1); 2178 if (error) 2179 goto out; 2180 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2181 2182 /* 2x2 cases: read/write, faf/nofaf */ 2183 if (BUF_ISREAD(bp)) { 2184 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2185 PUFFS_VN_READ, VPTOPNC(vp)); 2186 puffs_msg_setdelta(park_rw, tomove); 2187 if (BIOASYNC(bp)) { 2188 puffs_msg_setcall(park_rw, 2189 puffs_parkdone_asyncbioread, bp); 2190 puffs_msg_enqueue(pmp, park_rw); 2191 dobiodone = 0; 2192 } else { 2193 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2194 NULL, error); 2195 error = checkerr(pmp, error, __func__); 2196 if (error) 2197 goto out; 2198 2199 if (rw_msg->pvnr_resid > tomove) { 2200 puffs_senderr(pmp, PUFFS_ERR_READ, 2201 E2BIG, "resid grew", VPTOPNC(vp)); 2202 ERROUT(EPROTO); 2203 } 2204 2205 moved = tomove - rw_msg->pvnr_resid; 2206 2207 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2208 bp->b_resid = bp->b_bcount - moved; 2209 } 2210 } else { 2211 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2212 PUFFS_VN_WRITE, VPTOPNC(vp)); 2213 /* 2214 * make pages read-only before we write them if we want 2215 * write caching info 2216 */ 2217 if (PUFFS_WCACHEINFO(pmp)) { 2218 struct uvm_object *uobj = &vp->v_uobj; 2219 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2220 struct vm_page *vmp; 2221 int i; 2222 2223 for (i = 0; i < npages; i++) { 2224 vmp= uvm_pageratop((vaddr_t)bp->b_data 2225 + (i << PAGE_SHIFT)); 2226 DPRINTF(("puffs_strategy: write-protecting " 2227 "vp %p page %p, offset %" PRId64"\n", 2228 vp, vmp, vmp->offset)); 2229 mutex_enter(&uobj->vmobjlock); 2230 vmp->flags |= PG_RDONLY; 2231 pmap_page_protect(vmp, VM_PROT_READ); 2232 mutex_exit(&uobj->vmobjlock); 2233 } 2234 } 2235 2236 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2237 if (dofaf) { 2238 puffs_msg_setfaf(park_rw); 2239 } else if (BIOASYNC(bp)) { 2240 puffs_msg_setcall(park_rw, 2241 puffs_parkdone_asyncbiowrite, bp); 2242 dobiodone = 0; 2243 } 2244 2245 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2246 2247 if (dobiodone == 0) 2248 goto out; 2249 2250 /* 2251 * XXXXXXXX: wrong, but kernel can't survive strategy 2252 * failure currently. Here, have one more X: X. 2253 */ 2254 if (error != ENOMEM) 2255 error = 0; 2256 2257 error = checkerr(pmp, error, __func__); 2258 if (error) 2259 goto out; 2260 2261 if (rw_msg->pvnr_resid > tomove) { 2262 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2263 E2BIG, "resid grew", VPTOPNC(vp)); 2264 ERROUT(EPROTO); 2265 } 2266 2267 /* 2268 * FAF moved everything. Frankly, we don't 2269 * really have a choice. 2270 */ 2271 if (dofaf && error == 0) 2272 moved = tomove; 2273 else 2274 moved = tomove - rw_msg->pvnr_resid; 2275 2276 bp->b_resid = bp->b_bcount - moved; 2277 if (bp->b_resid != 0) { 2278 ERROUT(EIO); 2279 } 2280 } 2281 2282 out: 2283 if (park_rw) 2284 puffs_msgmem_release(park_rw); 2285 2286 if (error) 2287 bp->b_error = error; 2288 2289 if (error || dobiodone) 2290 biodone(bp); 2291 2292 return error; 2293 } 2294 2295 int 2296 puffs_vnop_mmap(void *v) 2297 { 2298 struct vop_mmap_args /* { 2299 const struct vnodeop_desc *a_desc; 2300 struct vnode *a_vp; 2301 vm_prot_t a_prot; 2302 kauth_cred_t a_cred; 2303 } */ *ap = v; 2304 PUFFS_MSG_VARS(vn, mmap); 2305 struct vnode *vp = ap->a_vp; 2306 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2307 int error; 2308 2309 if (!PUFFS_USE_PAGECACHE(pmp)) 2310 return genfs_eopnotsupp(v); 2311 2312 if (EXISTSOP(pmp, MMAP)) { 2313 PUFFS_MSG_ALLOC(vn, mmap); 2314 mmap_msg->pvnr_prot = ap->a_prot; 2315 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2316 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2317 PUFFS_VN_MMAP, VPTOPNC(vp)); 2318 2319 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2320 error = checkerr(pmp, error, __func__); 2321 PUFFS_MSG_RELEASE(mmap); 2322 } else { 2323 error = genfs_mmap(v); 2324 } 2325 2326 return error; 2327 } 2328 2329 2330 /* 2331 * The rest don't get a free trip to userspace and back, they 2332 * have to stay within the kernel. 2333 */ 2334 2335 /* 2336 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2337 * well, maybe somehow, somewhere, some day .... 2338 */ 2339 int 2340 puffs_vnop_bmap(void *v) 2341 { 2342 struct vop_bmap_args /* { 2343 const struct vnodeop_desc *a_desc; 2344 struct vnode *a_vp; 2345 daddr_t a_bn; 2346 struct vnode **a_vpp; 2347 daddr_t *a_bnp; 2348 int *a_runp; 2349 } */ *ap = v; 2350 struct puffs_mount *pmp; 2351 2352 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2353 2354 if (ap->a_vpp) 2355 *ap->a_vpp = ap->a_vp; 2356 if (ap->a_bnp) 2357 *ap->a_bnp = ap->a_bn; 2358 if (ap->a_runp) 2359 *ap->a_runp 2360 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2361 2362 return 0; 2363 } 2364 2365 /* 2366 * Handle getpages faults in puffs. We let genfs_getpages() do most 2367 * of the dirty work, but we come in this route to do accounting tasks. 2368 * If the user server has specified functions for cache notifications 2369 * about reads and/or writes, we record which type of operation we got, 2370 * for which page range, and proceed to issue a FAF notification to the 2371 * server about it. 2372 */ 2373 int 2374 puffs_vnop_getpages(void *v) 2375 { 2376 struct vop_getpages_args /* { 2377 const struct vnodeop_desc *a_desc; 2378 struct vnode *a_vp; 2379 voff_t a_offset; 2380 struct vm_page **a_m; 2381 int *a_count; 2382 int a_centeridx; 2383 vm_prot_t a_access_type; 2384 int a_advice; 2385 int a_flags; 2386 } */ *ap = v; 2387 struct puffs_mount *pmp; 2388 struct puffs_node *pn; 2389 struct vnode *vp; 2390 struct vm_page **pgs; 2391 struct puffs_cacheinfo *pcinfo = NULL; 2392 struct puffs_cacherun *pcrun; 2393 void *parkmem = NULL; 2394 size_t runsizes; 2395 int i, npages, si, streakon; 2396 int error, locked, write; 2397 2398 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2399 npages = *ap->a_count; 2400 pgs = ap->a_m; 2401 vp = ap->a_vp; 2402 pn = vp->v_data; 2403 locked = (ap->a_flags & PGO_LOCKED) != 0; 2404 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2405 2406 /* ccg xnaht - gets Wuninitialized wrong */ 2407 pcrun = NULL; 2408 runsizes = 0; 2409 2410 /* 2411 * Check that we aren't trying to fault in pages which our file 2412 * server doesn't know about. This happens if we extend a file by 2413 * skipping some pages and later try to fault in pages which 2414 * are between pn_serversize and vp_size. This check optimizes 2415 * away the common case where a file is being extended. 2416 */ 2417 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2418 struct vattr va; 2419 2420 /* try again later when we can block */ 2421 if (locked) 2422 ERROUT(EBUSY); 2423 2424 mutex_exit(&vp->v_interlock); 2425 vattr_null(&va); 2426 va.va_size = vp->v_size; 2427 error = dosetattr(vp, &va, FSCRED, 0); 2428 if (error) 2429 ERROUT(error); 2430 mutex_enter(&vp->v_interlock); 2431 } 2432 2433 if (write && PUFFS_WCACHEINFO(pmp)) { 2434 #ifdef notnowjohn 2435 /* allocate worst-case memory */ 2436 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2437 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2438 locked ? KM_NOSLEEP : KM_SLEEP); 2439 2440 /* 2441 * can't block if we're locked and can't mess up caching 2442 * information for fs server. so come back later, please 2443 */ 2444 if (pcinfo == NULL) 2445 ERROUT(ENOMEM); 2446 2447 parkmem = puffs_park_alloc(locked == 0); 2448 if (parkmem == NULL) 2449 ERROUT(ENOMEM); 2450 2451 pcrun = pcinfo->pcache_runs; 2452 #else 2453 (void)parkmem; 2454 #endif 2455 } 2456 2457 error = genfs_getpages(v); 2458 if (error) 2459 goto out; 2460 2461 if (PUFFS_WCACHEINFO(pmp) == 0) 2462 goto out; 2463 2464 /* 2465 * Let's see whose fault it was and inform the user server of 2466 * possibly read/written pages. Map pages from read faults 2467 * strictly read-only, since otherwise we might miss info on 2468 * when the page is actually write-faulted to. 2469 */ 2470 if (!locked) 2471 mutex_enter(&vp->v_uobj.vmobjlock); 2472 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2473 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2474 if (streakon && write) { 2475 streakon = 0; 2476 pcrun[si].pcache_runend 2477 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2478 si++; 2479 } 2480 continue; 2481 } 2482 if (streakon == 0 && write) { 2483 streakon = 1; 2484 pcrun[si].pcache_runstart = pgs[i]->offset; 2485 } 2486 2487 if (!write) 2488 pgs[i]->flags |= PG_RDONLY; 2489 } 2490 /* was the last page part of our streak? */ 2491 if (streakon) { 2492 pcrun[si].pcache_runend 2493 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2494 si++; 2495 } 2496 if (!locked) 2497 mutex_exit(&vp->v_uobj.vmobjlock); 2498 2499 KASSERT(si <= (npages / 2) + 1); 2500 2501 #ifdef notnowjohn 2502 /* send results to userspace */ 2503 if (write) 2504 puffs_cacheop(pmp, parkmem, pcinfo, 2505 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2506 #endif 2507 2508 out: 2509 if (error) { 2510 if (pcinfo != NULL) 2511 kmem_free(pcinfo, 2512 sizeof(struct puffs_cacheinfo) + runsizes); 2513 #ifdef notnowjohn 2514 if (parkmem != NULL) 2515 puffs_park_release(parkmem, 1); 2516 #endif 2517 } 2518 2519 return error; 2520 } 2521 2522 int 2523 puffs_vnop_lock(void *v) 2524 { 2525 struct vop_lock_args /* { 2526 struct vnode *a_vp; 2527 int a_flags; 2528 } */ *ap = v; 2529 struct vnode *vp = ap->a_vp; 2530 struct mount *mp = vp->v_mount; 2531 int flags = ap->a_flags; 2532 2533 #if 0 2534 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2535 #endif 2536 2537 if (flags & LK_INTERLOCK) { 2538 mutex_exit(&vp->v_interlock); 2539 flags &= ~LK_INTERLOCK; 2540 } 2541 2542 /* 2543 * XXX: this avoids deadlocking when we're suspending. 2544 * e.g. some ops holding the vnode lock might be blocked for 2545 * the vfs transaction lock so we'd deadlock. 2546 * 2547 * Now once again this is skating on the thin ice of modern life, 2548 * since we are breaking the consistency guarantee provided 2549 * _to the user server_ by vnode locking. Hopefully this will 2550 * get fixed soon enough by getting rid of the dependency on 2551 * vnode locks alltogether. 2552 */ 2553 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2554 return 0; 2555 } 2556 2557 return vlockmgr(&vp->v_lock, flags); 2558 } 2559 2560 int 2561 puffs_vnop_unlock(void *v) 2562 { 2563 struct vop_unlock_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 2570 #if 0 2571 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2572 #endif 2573 2574 /* XXX: see puffs_lock() */ 2575 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2576 return 0; 2577 } 2578 2579 return vlockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE); 2580 } 2581 2582 int 2583 puffs_vnop_islocked(void *v) 2584 { 2585 struct vop_islocked_args *ap = v; 2586 int rv; 2587 2588 rv = vlockstatus(&ap->a_vp->v_lock); 2589 return rv; 2590 } 2591 2592 2593 /* 2594 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2595 * FAF update information for the puffs node first. 2596 */ 2597 int 2598 puffs_vnop_spec_read(void *v) 2599 { 2600 struct vop_read_args /* { 2601 const struct vnodeop_desc *a_desc; 2602 struct vnode *a_vp; 2603 struct uio *a_uio; 2604 int a_ioflag; 2605 kauth_cred_t a_cred; 2606 } */ *ap = v; 2607 2608 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2609 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2610 } 2611 2612 int 2613 puffs_vnop_spec_write(void *v) 2614 { 2615 struct vop_write_args /* { 2616 const struct vnodeop_desc *a_desc; 2617 struct vnode *a_vp; 2618 struct uio *a_uio; 2619 int a_ioflag; 2620 kauth_cred_t a_cred; 2621 } */ *ap = v; 2622 2623 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2624 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2625 } 2626 2627 int 2628 puffs_vnop_fifo_read(void *v) 2629 { 2630 struct vop_read_args /* { 2631 const struct vnodeop_desc *a_desc; 2632 struct vnode *a_vp; 2633 struct uio *a_uio; 2634 int a_ioflag; 2635 kauth_cred_t a_cred; 2636 } */ *ap = v; 2637 2638 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2639 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2640 } 2641 2642 int 2643 puffs_vnop_fifo_write(void *v) 2644 { 2645 struct vop_write_args /* { 2646 const struct vnodeop_desc *a_desc; 2647 struct vnode *a_vp; 2648 struct uio *a_uio; 2649 int a_ioflag; 2650 kauth_cred_t a_cred; 2651 } */ *ap = v; 2652 2653 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2654 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2655 } 2656
Indexes created Wed Oct 01 15:09:59 GMT 2025