puffs_vnops.c revision 1.135
1 /* $NetBSD: puffs_vnops.c,v 1.135 2009/09/30 18:22:29 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 1.135 2009/09/30 18:22:29 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 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 649 650 error = checkerr(pmp, error, __func__); 651 if (error) 652 goto out; 653 654 error = puffs_newnode(mp, dvp, ap->a_vpp, 655 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 656 if (error) 657 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 658 create_msg->pvnr_newnode, cnp); 659 660 out: 661 vput(dvp); 662 if (error || (cnp->cn_flags & SAVESTART) == 0) 663 PNBUF_PUT(cnp->cn_pnbuf); 664 665 DPRINTF(("puffs_create: return %d\n", error)); 666 PUFFS_MSG_RELEASE(create); 667 return error; 668 } 669 670 int 671 puffs_vnop_mknod(void *v) 672 { 673 struct vop_mknod_args /* { 674 const struct vnodeop_desc *a_desc; 675 struct vnode *a_dvp; 676 struct vnode **a_vpp; 677 struct componentname *a_cnp; 678 struct vattr *a_vap; 679 } */ *ap = v; 680 PUFFS_MSG_VARS(vn, mknod); 681 struct vnode *dvp = ap->a_dvp; 682 struct puffs_node *dpn = VPTOPP(dvp); 683 struct componentname *cnp = ap->a_cnp; 684 struct mount *mp = dvp->v_mount; 685 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 686 int error; 687 688 PUFFS_MSG_ALLOC(vn, mknod); 689 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 690 cnp, PUFFS_USE_FULLPNBUF(pmp)); 691 mknod_msg->pvnr_va = *ap->a_vap; 692 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 693 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 694 695 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 696 697 error = checkerr(pmp, error, __func__); 698 if (error) 699 goto out; 700 701 error = puffs_newnode(mp, dvp, ap->a_vpp, 702 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 703 ap->a_vap->va_rdev); 704 if (error) 705 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 706 mknod_msg->pvnr_newnode, cnp); 707 708 out: 709 vput(dvp); 710 PUFFS_MSG_RELEASE(mknod); 711 if (error || (cnp->cn_flags & SAVESTART) == 0) 712 PNBUF_PUT(cnp->cn_pnbuf); 713 return error; 714 } 715 716 int 717 puffs_vnop_open(void *v) 718 { 719 struct vop_open_args /* { 720 const struct vnodeop_desc *a_desc; 721 struct vnode *a_vp; 722 int a_mode; 723 kauth_cred_t a_cred; 724 } */ *ap = v; 725 PUFFS_MSG_VARS(vn, open); 726 struct vnode *vp = ap->a_vp; 727 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 728 int mode = ap->a_mode; 729 int error; 730 731 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 732 733 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 734 ERROUT(EROFS); 735 736 if (!EXISTSOP(pmp, OPEN)) 737 ERROUT(0); 738 739 PUFFS_MSG_ALLOC(vn, open); 740 open_msg->pvnr_mode = mode; 741 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 742 puffs_msg_setinfo(park_open, PUFFSOP_VN, 743 PUFFS_VN_OPEN, VPTOPNC(vp)); 744 745 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 746 error = checkerr(pmp, error, __func__); 747 748 out: 749 DPRINTF(("puffs_open: returning %d\n", error)); 750 PUFFS_MSG_RELEASE(open); 751 return error; 752 } 753 754 int 755 puffs_vnop_close(void *v) 756 { 757 struct vop_close_args /* { 758 const struct vnodeop_desc *a_desc; 759 struct vnode *a_vp; 760 int a_fflag; 761 kauth_cred_t a_cred; 762 } */ *ap = v; 763 PUFFS_MSG_VARS(vn, close); 764 struct vnode *vp = ap->a_vp; 765 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 766 767 PUFFS_MSG_ALLOC(vn, close); 768 puffs_msg_setfaf(park_close); 769 close_msg->pvnr_fflag = ap->a_fflag; 770 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 771 puffs_msg_setinfo(park_close, PUFFSOP_VN, 772 PUFFS_VN_CLOSE, VPTOPNC(vp)); 773 774 puffs_msg_enqueue(pmp, park_close); 775 PUFFS_MSG_RELEASE(close); 776 return 0; 777 } 778 779 int 780 puffs_vnop_access(void *v) 781 { 782 struct vop_access_args /* { 783 const struct vnodeop_desc *a_desc; 784 struct vnode *a_vp; 785 int a_mode; 786 kauth_cred_t a_cred; 787 } */ *ap = v; 788 PUFFS_MSG_VARS(vn, access); 789 struct vnode *vp = ap->a_vp; 790 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 791 int mode = ap->a_mode; 792 int error; 793 794 if (mode & VWRITE) { 795 switch (vp->v_type) { 796 case VDIR: 797 case VLNK: 798 case VREG: 799 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 800 || !EXISTSOP(pmp, WRITE)) 801 return EROFS; 802 break; 803 default: 804 break; 805 } 806 } 807 808 if (!EXISTSOP(pmp, ACCESS)) 809 return 0; 810 811 PUFFS_MSG_ALLOC(vn, access); 812 access_msg->pvnr_mode = ap->a_mode; 813 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 814 puffs_msg_setinfo(park_access, PUFFSOP_VN, 815 PUFFS_VN_ACCESS, VPTOPNC(vp)); 816 817 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 818 error = checkerr(pmp, error, __func__); 819 PUFFS_MSG_RELEASE(access); 820 821 return error; 822 } 823 824 int 825 puffs_vnop_getattr(void *v) 826 { 827 struct vop_getattr_args /* { 828 const struct vnodeop_desc *a_desc; 829 struct vnode *a_vp; 830 struct vattr *a_vap; 831 kauth_cred_t a_cred; 832 } */ *ap = v; 833 PUFFS_MSG_VARS(vn, getattr); 834 struct vnode *vp = ap->a_vp; 835 struct mount *mp = vp->v_mount; 836 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 837 struct vattr *vap, *rvap; 838 struct puffs_node *pn; 839 int error = 0; 840 841 vap = ap->a_vap; 842 843 PUFFS_MSG_ALLOC(vn, getattr); 844 vattr_null(&getattr_msg->pvnr_va); 845 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 846 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 847 PUFFS_VN_GETATTR, VPTOPNC(vp)); 848 849 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 850 error = checkerr(pmp, error, __func__); 851 if (error) 852 goto out; 853 854 rvap = &getattr_msg->pvnr_va; 855 /* 856 * Don't listen to the file server regarding special device 857 * size info, the file server doesn't know anything about them. 858 */ 859 if (vp->v_type == VBLK || vp->v_type == VCHR) 860 rvap->va_size = vp->v_size; 861 862 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 863 if (vp->v_type == VBLK) 864 rvap->va_blocksize = BLKDEV_IOSIZE; 865 else if (vp->v_type == VCHR) 866 rvap->va_blocksize = MAXBSIZE; 867 868 (void) memcpy(vap, rvap, sizeof(struct vattr)); 869 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 870 871 pn = VPTOPP(vp); 872 if (pn->pn_stat & PNODE_METACACHE_ATIME) 873 vap->va_atime = pn->pn_mc_atime; 874 if (pn->pn_stat & PNODE_METACACHE_CTIME) 875 vap->va_ctime = pn->pn_mc_ctime; 876 if (pn->pn_stat & PNODE_METACACHE_MTIME) 877 vap->va_mtime = pn->pn_mc_mtime; 878 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 879 vap->va_size = pn->pn_mc_size; 880 } else { 881 if (rvap->va_size != VNOVAL 882 && vp->v_type != VBLK && vp->v_type != VCHR) { 883 uvm_vnp_setsize(vp, rvap->va_size); 884 pn->pn_serversize = rvap->va_size; 885 } 886 } 887 888 out: 889 PUFFS_MSG_RELEASE(getattr); 890 return error; 891 } 892 893 static int 894 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int chsize) 895 { 896 PUFFS_MSG_VARS(vn, setattr); 897 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 898 struct puffs_node *pn = vp->v_data; 899 int error; 900 901 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 902 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 903 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 904 || vap->va_mode != (mode_t)VNOVAL)) 905 return EROFS; 906 907 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 908 && vp->v_type == VREG && vap->va_size != VNOVAL) 909 return EROFS; 910 911 /* 912 * Flush metacache first. If we are called with some explicit 913 * parameters, treat them as information overriding metacache 914 * information. 915 */ 916 if (pn->pn_stat & PNODE_METACACHE_MASK) { 917 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 918 && vap->va_atime.tv_sec == VNOVAL) 919 vap->va_atime = pn->pn_mc_atime; 920 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 921 && vap->va_ctime.tv_sec == VNOVAL) 922 vap->va_ctime = pn->pn_mc_ctime; 923 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 924 && vap->va_mtime.tv_sec == VNOVAL) 925 vap->va_mtime = pn->pn_mc_mtime; 926 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 927 && vap->va_size == VNOVAL) 928 vap->va_size = pn->pn_mc_size; 929 930 pn->pn_stat &= ~PNODE_METACACHE_MASK; 931 } 932 933 PUFFS_MSG_ALLOC(vn, setattr); 934 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 935 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 936 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 937 PUFFS_VN_SETATTR, VPTOPNC(vp)); 938 939 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setattr, vp->v_data, NULL, error); 940 PUFFS_MSG_RELEASE(setattr); 941 error = checkerr(pmp, error, __func__); 942 if (error) 943 return error; 944 945 if (vap->va_size != VNOVAL) { 946 pn->pn_serversize = vap->va_size; 947 if (chsize) 948 uvm_vnp_setsize(vp, vap->va_size); 949 } 950 951 return 0; 952 } 953 954 int 955 puffs_vnop_setattr(void *v) 956 { 957 struct vop_getattr_args /* { 958 const struct vnodeop_desc *a_desc; 959 struct vnode *a_vp; 960 struct vattr *a_vap; 961 kauth_cred_t a_cred; 962 } */ *ap = v; 963 964 return dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, 1); 965 } 966 967 static __inline int 968 doinact(struct puffs_mount *pmp, int iaflag) 969 { 970 971 if (EXISTSOP(pmp, INACTIVE)) 972 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 973 if (iaflag || ALLOPS(pmp)) 974 return 1; 975 else 976 return 0; 977 else 978 return 1; 979 else 980 return 0; 981 } 982 983 static void 984 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 985 { 986 int error; 987 PUFFS_MSG_VARS(vn, inactive); 988 989 if (doinact(pmp, iaflag)) { 990 PUFFS_MSG_ALLOC(vn, inactive); 991 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 992 PUFFS_VN_INACTIVE, ck); 993 994 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 995 PUFFS_MSG_RELEASE(inactive); 996 } 997 } 998 999 /* XXX: callinactive can't setback */ 1000 int 1001 puffs_vnop_inactive(void *v) 1002 { 1003 struct vop_inactive_args /* { 1004 const struct vnodeop_desc *a_desc; 1005 struct vnode *a_vp; 1006 } */ *ap = v; 1007 PUFFS_MSG_VARS(vn, inactive); 1008 struct vnode *vp = ap->a_vp; 1009 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1010 struct puffs_node *pnode; 1011 int error; 1012 1013 pnode = vp->v_data; 1014 1015 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1016 PUFFS_MSG_ALLOC(vn, inactive); 1017 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1018 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1019 1020 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1021 NULL, error); 1022 PUFFS_MSG_RELEASE(inactive); 1023 } 1024 pnode->pn_stat &= ~PNODE_DOINACT; 1025 1026 /* 1027 * file server thinks it's gone? then don't be afraid care, 1028 * node's life was already all it would ever be 1029 */ 1030 *ap->a_recycle = ((pnode->pn_stat & PNODE_NOREFS) != 0); 1031 1032 VOP_UNLOCK(vp, 0); 1033 1034 return 0; 1035 } 1036 1037 static void 1038 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck) 1039 { 1040 PUFFS_MSG_VARS(vn, reclaim); 1041 1042 if (!EXISTSOP(pmp, RECLAIM)) 1043 return; 1044 1045 PUFFS_MSG_ALLOC(vn, reclaim); 1046 puffs_msg_setfaf(park_reclaim); 1047 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1048 1049 puffs_msg_enqueue(pmp, park_reclaim); 1050 PUFFS_MSG_RELEASE(reclaim); 1051 } 1052 1053 /* 1054 * always FAF, we don't really care if the server wants to fail to 1055 * reclaim the node or not 1056 */ 1057 int 1058 puffs_vnop_reclaim(void *v) 1059 { 1060 struct vop_reclaim_args /* { 1061 const struct vnodeop_desc *a_desc; 1062 struct vnode *a_vp; 1063 } */ *ap = v; 1064 struct vnode *vp = ap->a_vp; 1065 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1066 struct puffs_node *pnode = vp->v_data; 1067 bool notifyserver = true; 1068 1069 /* 1070 * first things first: check if someone is trying to reclaim the 1071 * root vnode. do not allow that to travel to userspace. 1072 * Note that we don't need to take the lock similarly to 1073 * puffs_root(), since there is only one of us. 1074 */ 1075 if (vp->v_vflag & VV_ROOT) { 1076 mutex_enter(&pmp->pmp_lock); 1077 KASSERT(pmp->pmp_root != NULL); 1078 pmp->pmp_root = NULL; 1079 mutex_exit(&pmp->pmp_lock); 1080 notifyserver = false; 1081 } 1082 1083 /* 1084 * purge info from kernel before issueing FAF, since we 1085 * don't really know when we'll get around to it after 1086 * that and someone might race us into node creation 1087 */ 1088 mutex_enter(&pmp->pmp_lock); 1089 LIST_REMOVE(pnode, pn_hashent); 1090 mutex_exit(&pmp->pmp_lock); 1091 if (PUFFS_USE_NAMECACHE(pmp)) 1092 cache_purge(vp); 1093 1094 if (notifyserver) 1095 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp)); 1096 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_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1480 1481 error = checkerr(pmp, error, __func__); 1482 if (error) 1483 goto out; 1484 1485 error = puffs_newnode(mp, dvp, ap->a_vpp, 1486 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1487 if (error) 1488 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1489 mkdir_msg->pvnr_newnode, cnp); 1490 1491 out: 1492 vput(dvp); 1493 PUFFS_MSG_RELEASE(mkdir); 1494 if (error || (cnp->cn_flags & SAVESTART) == 0) 1495 PNBUF_PUT(cnp->cn_pnbuf); 1496 return error; 1497 } 1498 1499 static int 1500 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1501 struct componentname *cnp) 1502 { 1503 PUFFS_MSG_VARS(vn, rmdir); 1504 int error; 1505 1506 PUFFS_MSG_ALLOC(vn, rmdir); 1507 rmdir_msg->pvnr_cookie_targ = ck; 1508 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1509 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1510 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1511 1512 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1513 PUFFS_MSG_RELEASE(rmdir); 1514 1515 return checkerr(pmp, error, __func__); 1516 } 1517 1518 int 1519 puffs_vnop_rmdir(void *v) 1520 { 1521 struct vop_rmdir_args /* { 1522 const struct vnodeop_desc *a_desc; 1523 struct vnode *a_dvp; 1524 struct vnode *a_vp; 1525 struct componentname *a_cnp; 1526 } */ *ap = v; 1527 PUFFS_MSG_VARS(vn, rmdir); 1528 struct vnode *dvp = ap->a_dvp; 1529 struct vnode *vp = ap->a_vp; 1530 struct puffs_node *dpn = VPTOPP(dvp); 1531 struct puffs_node *pn = VPTOPP(vp); 1532 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1533 struct componentname *cnp = ap->a_cnp; 1534 int error; 1535 1536 PUFFS_MSG_ALLOC(vn, rmdir); 1537 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1538 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1539 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1540 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1541 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1542 1543 puffs_msg_enqueue(pmp, park_rmdir); 1544 REFPN_AND_UNLOCKVP(dvp, dpn); 1545 REFPN_AND_UNLOCKVP(vp, pn); 1546 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1547 1548 PUFFS_MSG_RELEASE(rmdir); 1549 1550 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1551 RELEPN_AND_VP(dvp, dpn); 1552 RELEPN_AND_VP(vp, pn); 1553 1554 if (error || (cnp->cn_flags & SAVESTART) == 0) 1555 PNBUF_PUT(cnp->cn_pnbuf); 1556 1557 return error; 1558 } 1559 1560 int 1561 puffs_vnop_link(void *v) 1562 { 1563 struct vop_link_args /* { 1564 const struct vnodeop_desc *a_desc; 1565 struct vnode *a_dvp; 1566 struct vnode *a_vp; 1567 struct componentname *a_cnp; 1568 } */ *ap = v; 1569 PUFFS_MSG_VARS(vn, link); 1570 struct vnode *dvp = ap->a_dvp; 1571 struct vnode *vp = ap->a_vp; 1572 struct puffs_node *dpn = VPTOPP(dvp); 1573 struct puffs_node *pn = VPTOPP(vp); 1574 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1575 struct componentname *cnp = ap->a_cnp; 1576 int error; 1577 1578 PUFFS_MSG_ALLOC(vn, link); 1579 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1580 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1581 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1582 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1583 PUFFS_VN_LINK, VPTOPNC(dvp)); 1584 1585 puffs_msg_enqueue(pmp, park_link); 1586 REFPN_AND_UNLOCKVP(dvp, dpn); 1587 REFPN(pn); 1588 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1589 1590 PUFFS_MSG_RELEASE(link); 1591 1592 error = checkerr(pmp, error, __func__); 1593 1594 /* 1595 * XXX: stay in touch with the cache. I don't like this, but 1596 * don't have a better solution either. See also puffs_rename(). 1597 */ 1598 if (error == 0) 1599 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1600 1601 PNBUF_PUT(cnp->cn_pnbuf); 1602 RELEPN_AND_VP(dvp, dpn); 1603 puffs_releasenode(pn); 1604 1605 return error; 1606 } 1607 1608 int 1609 puffs_vnop_symlink(void *v) 1610 { 1611 struct vop_symlink_args /* { 1612 const struct vnodeop_desc *a_desc; 1613 struct vnode *a_dvp; 1614 struct vnode **a_vpp; 1615 struct componentname *a_cnp; 1616 struct vattr *a_vap; 1617 char *a_target; 1618 } */ *ap = v; 1619 PUFFS_MSG_VARS(vn, symlink); 1620 struct vnode *dvp = ap->a_dvp; 1621 struct puffs_node *dpn = VPTOPP(dvp); 1622 struct mount *mp = dvp->v_mount; 1623 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1624 struct componentname *cnp = ap->a_cnp; 1625 int error; 1626 1627 *ap->a_vpp = NULL; 1628 1629 PUFFS_MSG_ALLOC(vn, symlink); 1630 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1631 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1632 symlink_msg->pvnr_va = *ap->a_vap; 1633 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1634 sizeof(symlink_msg->pvnr_link)); 1635 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1636 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1637 1638 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 1639 1640 error = checkerr(pmp, error, __func__); 1641 if (error) 1642 goto out; 1643 1644 error = puffs_newnode(mp, dvp, ap->a_vpp, 1645 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 1646 if (error) 1647 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 1648 symlink_msg->pvnr_newnode, cnp); 1649 1650 out: 1651 vput(dvp); 1652 PUFFS_MSG_RELEASE(symlink); 1653 if (error || (cnp->cn_flags & SAVESTART) == 0) 1654 PNBUF_PUT(cnp->cn_pnbuf); 1655 1656 return error; 1657 } 1658 1659 int 1660 puffs_vnop_readlink(void *v) 1661 { 1662 struct vop_readlink_args /* { 1663 const struct vnodeop_desc *a_desc; 1664 struct vnode *a_vp; 1665 struct uio *a_uio; 1666 kauth_cred_t a_cred; 1667 } */ *ap = v; 1668 PUFFS_MSG_VARS(vn, readlink); 1669 struct vnode *vp = ap->a_vp; 1670 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1671 size_t linklen; 1672 int error; 1673 1674 PUFFS_MSG_ALLOC(vn, readlink); 1675 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1676 linklen = sizeof(readlink_msg->pvnr_link); 1677 readlink_msg->pvnr_linklen = linklen; 1678 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1679 PUFFS_VN_READLINK, VPTOPNC(vp)); 1680 1681 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1682 error = checkerr(pmp, error, __func__); 1683 if (error) 1684 goto out; 1685 1686 /* bad bad user file server */ 1687 if (readlink_msg->pvnr_linklen > linklen) { 1688 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1689 "linklen too big", VPTOPNC(ap->a_vp)); 1690 error = EPROTO; 1691 goto out; 1692 } 1693 1694 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 1695 ap->a_uio); 1696 out: 1697 PUFFS_MSG_RELEASE(readlink); 1698 return error; 1699 } 1700 1701 int 1702 puffs_vnop_rename(void *v) 1703 { 1704 struct vop_rename_args /* { 1705 const struct vnodeop_desc *a_desc; 1706 struct vnode *a_fdvp; 1707 struct vnode *a_fvp; 1708 struct componentname *a_fcnp; 1709 struct vnode *a_tdvp; 1710 struct vnode *a_tvp; 1711 struct componentname *a_tcnp; 1712 } */ *ap = v; 1713 PUFFS_MSG_VARS(vn, rename); 1714 struct vnode *fdvp = ap->a_fdvp; 1715 struct puffs_node *fpn = ap->a_fvp->v_data; 1716 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 1717 int error; 1718 1719 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) 1720 ERROUT(EXDEV); 1721 1722 PUFFS_MSG_ALLOC(vn, rename); 1723 rename_msg->pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1724 rename_msg->pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1725 if (ap->a_tvp) 1726 rename_msg->pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1727 else 1728 rename_msg->pvnr_cookie_targ = NULL; 1729 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 1730 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1731 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 1732 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1733 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 1734 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 1735 1736 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 1737 error = checkerr(pmp, error, __func__); 1738 1739 /* 1740 * XXX: stay in touch with the cache. I don't like this, but 1741 * don't have a better solution either. See also puffs_link(). 1742 */ 1743 if (error == 0) 1744 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 1745 1746 out: 1747 PUFFS_MSG_RELEASE(rename); 1748 if (ap->a_tvp != NULL) 1749 vput(ap->a_tvp); 1750 if (ap->a_tdvp == ap->a_tvp) 1751 vrele(ap->a_tdvp); 1752 else 1753 vput(ap->a_tdvp); 1754 1755 vrele(ap->a_fdvp); 1756 vrele(ap->a_fvp); 1757 1758 return error; 1759 } 1760 1761 #define RWARGS(cont, iofl, move, offset, creds) \ 1762 (cont)->pvnr_ioflag = (iofl); \ 1763 (cont)->pvnr_resid = (move); \ 1764 (cont)->pvnr_offset = (offset); \ 1765 puffs_credcvt(&(cont)->pvnr_cred, creds) 1766 1767 int 1768 puffs_vnop_read(void *v) 1769 { 1770 struct vop_read_args /* { 1771 const struct vnodeop_desc *a_desc; 1772 struct vnode *a_vp; 1773 struct uio *a_uio; 1774 int a_ioflag; 1775 kauth_cred_t a_cred; 1776 } */ *ap = v; 1777 PUFFS_MSG_VARS(vn, read); 1778 struct vnode *vp = ap->a_vp; 1779 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1780 struct uio *uio = ap->a_uio; 1781 size_t tomove, argsize; 1782 vsize_t bytelen; 1783 int error; 1784 1785 read_msg = NULL; 1786 error = 0; 1787 1788 /* std sanity */ 1789 if (uio->uio_resid == 0) 1790 return 0; 1791 if (uio->uio_offset < 0) 1792 return EINVAL; 1793 1794 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1795 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1796 1797 while (uio->uio_resid > 0) { 1798 bytelen = MIN(uio->uio_resid, 1799 vp->v_size - uio->uio_offset); 1800 if (bytelen == 0) 1801 break; 1802 1803 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 1804 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 1805 if (error) 1806 break; 1807 } 1808 1809 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1810 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 1811 } else { 1812 /* 1813 * in case it's not a regular file or we're operating 1814 * uncached, do read in the old-fashioned style, 1815 * i.e. explicit read operations 1816 */ 1817 1818 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1819 argsize = sizeof(struct puffs_vnmsg_read); 1820 puffs_msgmem_alloc(argsize + tomove, &park_read, 1821 (void *)&read_msg, 1); 1822 1823 error = 0; 1824 while (uio->uio_resid > 0) { 1825 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1826 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 1827 RWARGS(read_msg, ap->a_ioflag, tomove, 1828 uio->uio_offset, ap->a_cred); 1829 puffs_msg_setinfo(park_read, PUFFSOP_VN, 1830 PUFFS_VN_READ, VPTOPNC(vp)); 1831 puffs_msg_setdelta(park_read, tomove); 1832 1833 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 1834 NULL, error); 1835 error = checkerr(pmp, error, __func__); 1836 if (error) 1837 break; 1838 1839 if (read_msg->pvnr_resid > tomove) { 1840 puffs_senderr(pmp, PUFFS_ERR_READ, 1841 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1842 error = EPROTO; 1843 break; 1844 } 1845 1846 error = uiomove(read_msg->pvnr_data, 1847 tomove - read_msg->pvnr_resid, uio); 1848 1849 /* 1850 * in case the file is out of juice, resid from 1851 * userspace is != 0. and the error-case is 1852 * quite obvious 1853 */ 1854 if (error || read_msg->pvnr_resid) 1855 break; 1856 } 1857 1858 puffs_msgmem_release(park_read); 1859 } 1860 1861 return error; 1862 } 1863 1864 /* 1865 * XXX: in case of a failure, this leaves uio in a bad state. 1866 * We could theoretically copy the uio and iovecs and "replay" 1867 * them the right amount after the userspace trip, but don't 1868 * bother for now. 1869 */ 1870 int 1871 puffs_vnop_write(void *v) 1872 { 1873 struct vop_write_args /* { 1874 const struct vnodeop_desc *a_desc; 1875 struct vnode *a_vp; 1876 struct uio *a_uio; 1877 int a_ioflag; 1878 kauth_cred_t a_cred; 1879 } */ *ap = v; 1880 PUFFS_MSG_VARS(vn, write); 1881 struct vnode *vp = ap->a_vp; 1882 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1883 struct uio *uio = ap->a_uio; 1884 size_t tomove, argsize; 1885 off_t oldoff, newoff, origoff; 1886 vsize_t bytelen; 1887 int error, uflags; 1888 int ubcflags; 1889 1890 error = uflags = 0; 1891 write_msg = NULL; 1892 1893 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1894 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 1895 1896 /* 1897 * userspace *should* be allowed to control this, 1898 * but with UBC it's a bit unclear how to handle it 1899 */ 1900 if (ap->a_ioflag & IO_APPEND) 1901 uio->uio_offset = vp->v_size; 1902 1903 origoff = uio->uio_offset; 1904 while (uio->uio_resid > 0) { 1905 uflags |= PUFFS_UPDATECTIME; 1906 uflags |= PUFFS_UPDATEMTIME; 1907 oldoff = uio->uio_offset; 1908 bytelen = uio->uio_resid; 1909 1910 newoff = oldoff + bytelen; 1911 if (vp->v_size < newoff) { 1912 uvm_vnp_setwritesize(vp, newoff); 1913 } 1914 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1915 UVM_ADV_RANDOM, ubcflags); 1916 1917 /* 1918 * In case of a ubc_uiomove() error, 1919 * opt to not extend the file at all and 1920 * return an error. Otherwise, if we attempt 1921 * to clear the memory we couldn't fault to, 1922 * we might generate a kernel page fault. 1923 */ 1924 if (vp->v_size < newoff) { 1925 if (error == 0) { 1926 uflags |= PUFFS_UPDATESIZE; 1927 uvm_vnp_setsize(vp, newoff); 1928 } else { 1929 uvm_vnp_setwritesize(vp, vp->v_size); 1930 } 1931 } 1932 if (error) 1933 break; 1934 1935 /* 1936 * If we're writing large files, flush to file server 1937 * every 64k. Otherwise we can very easily exhaust 1938 * kernel and user memory, as the file server cannot 1939 * really keep up with our writing speed. 1940 * 1941 * Note: this does *NOT* honor MNT_ASYNC, because 1942 * that gives userland too much say in the kernel. 1943 */ 1944 if (oldoff >> 16 != uio->uio_offset >> 16) { 1945 mutex_enter(&vp->v_interlock); 1946 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1947 uio->uio_offset & ~0xffff, 1948 PGO_CLEANIT | PGO_SYNCIO); 1949 if (error) 1950 break; 1951 } 1952 } 1953 1954 /* synchronous I/O? */ 1955 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1956 mutex_enter(&vp->v_interlock); 1957 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1958 round_page(uio->uio_offset), 1959 PGO_CLEANIT | PGO_SYNCIO); 1960 1961 /* write through page cache? */ 1962 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1963 mutex_enter(&vp->v_interlock); 1964 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1965 round_page(uio->uio_offset), PGO_CLEANIT); 1966 } 1967 1968 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 1969 } else { 1970 /* tomove is non-increasing */ 1971 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1972 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 1973 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 1974 1975 while (uio->uio_resid > 0) { 1976 /* move data to buffer */ 1977 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1978 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 1979 RWARGS(write_msg, ap->a_ioflag, tomove, 1980 uio->uio_offset, ap->a_cred); 1981 error = uiomove(write_msg->pvnr_data, tomove, uio); 1982 if (error) 1983 break; 1984 1985 /* move buffer to userspace */ 1986 puffs_msg_setinfo(park_write, PUFFSOP_VN, 1987 PUFFS_VN_WRITE, VPTOPNC(vp)); 1988 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 1989 NULL, error); 1990 error = checkerr(pmp, error, __func__); 1991 if (error) 1992 break; 1993 1994 if (write_msg->pvnr_resid > tomove) { 1995 puffs_senderr(pmp, PUFFS_ERR_WRITE, 1996 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1997 error = EPROTO; 1998 break; 1999 } 2000 2001 /* adjust file size */ 2002 if (vp->v_size < uio->uio_offset) 2003 uvm_vnp_setsize(vp, uio->uio_offset); 2004 2005 /* didn't move everything? bad userspace. bail */ 2006 if (write_msg->pvnr_resid != 0) { 2007 error = EIO; 2008 break; 2009 } 2010 } 2011 puffs_msgmem_release(park_write); 2012 } 2013 2014 return error; 2015 } 2016 2017 int 2018 puffs_vnop_print(void *v) 2019 { 2020 struct vop_print_args /* { 2021 struct vnode *a_vp; 2022 } */ *ap = v; 2023 PUFFS_MSG_VARS(vn, print); 2024 struct vnode *vp = ap->a_vp; 2025 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2026 struct puffs_node *pn = vp->v_data; 2027 int error; 2028 2029 /* kernel portion */ 2030 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2031 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 2032 if (vp->v_type == VFIFO) 2033 fifo_printinfo(vp); 2034 2035 /* userspace portion */ 2036 if (EXISTSOP(pmp, PRINT)) { 2037 PUFFS_MSG_ALLOC(vn, print); 2038 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2039 PUFFS_VN_PRINT, VPTOPNC(vp)); 2040 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2041 NULL, error); 2042 PUFFS_MSG_RELEASE(print); 2043 } 2044 2045 return 0; 2046 } 2047 2048 int 2049 puffs_vnop_pathconf(void *v) 2050 { 2051 struct vop_pathconf_args /* { 2052 const struct vnodeop_desc *a_desc; 2053 struct vnode *a_vp; 2054 int a_name; 2055 register_t *a_retval; 2056 } */ *ap = v; 2057 PUFFS_MSG_VARS(vn, pathconf); 2058 struct vnode *vp = ap->a_vp; 2059 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2060 int error; 2061 2062 PUFFS_MSG_ALLOC(vn, pathconf); 2063 pathconf_msg->pvnr_name = ap->a_name; 2064 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2065 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2066 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2067 error = checkerr(pmp, error, __func__); 2068 if (!error) 2069 *ap->a_retval = pathconf_msg->pvnr_retval; 2070 PUFFS_MSG_RELEASE(pathconf); 2071 2072 return error; 2073 } 2074 2075 int 2076 puffs_vnop_advlock(void *v) 2077 { 2078 struct vop_advlock_args /* { 2079 const struct vnodeop_desc *a_desc; 2080 struct vnode *a_vp; 2081 void *a_id; 2082 int a_op; 2083 struct flock *a_fl; 2084 int a_flags; 2085 } */ *ap = v; 2086 PUFFS_MSG_VARS(vn, advlock); 2087 struct vnode *vp = ap->a_vp; 2088 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2089 int error; 2090 2091 PUFFS_MSG_ALLOC(vn, advlock); 2092 error = copyin(ap->a_fl, &advlock_msg->pvnr_fl, sizeof(struct flock)); 2093 if (error) 2094 goto out; 2095 advlock_msg->pvnr_id = ap->a_id; 2096 advlock_msg->pvnr_op = ap->a_op; 2097 advlock_msg->pvnr_flags = ap->a_flags; 2098 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2099 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2100 2101 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2102 error = checkerr(pmp, error, __func__); 2103 2104 out: 2105 PUFFS_MSG_RELEASE(advlock); 2106 return error; 2107 } 2108 2109 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2110 2111 /* 2112 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2113 */ 2114 int 2115 puffs_vnop_strategy(void *v) 2116 { 2117 struct vop_strategy_args /* { 2118 const struct vnodeop_desc *a_desc; 2119 struct vnode *a_vp; 2120 struct buf *a_bp; 2121 } */ *ap = v; 2122 PUFFS_MSG_VARS(vn, rw); 2123 struct vnode *vp = ap->a_vp; 2124 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2125 struct puffs_node *pn; 2126 struct buf *bp; 2127 size_t argsize; 2128 size_t tomove, moved; 2129 int error, dofaf, dobiodone; 2130 2131 pmp = MPTOPUFFSMP(vp->v_mount); 2132 bp = ap->a_bp; 2133 error = 0; 2134 dofaf = 0; 2135 pn = VPTOPP(vp); 2136 park_rw = NULL; /* explicit */ 2137 dobiodone = 1; 2138 2139 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2140 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2141 ERROUT(EOPNOTSUPP); 2142 2143 #ifdef DIAGNOSTIC 2144 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2145 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2146 bp->b_bcount); 2147 #endif 2148 2149 /* 2150 * See explanation for the necessity of a FAF in puffs_fsync. 2151 * 2152 * Also, do FAF in case we're suspending. 2153 * See puffs_vfsops.c:pageflush() 2154 */ 2155 if (BUF_ISWRITE(bp)) { 2156 mutex_enter(&vp->v_interlock); 2157 if (vp->v_iflag & VI_XLOCK) 2158 dofaf = 1; 2159 if (pn->pn_stat & PNODE_SUSPEND) 2160 dofaf = 1; 2161 mutex_exit(&vp->v_interlock); 2162 } 2163 2164 #ifdef DIAGNOSTIC 2165 if (curlwp == uvm.pagedaemon_lwp) 2166 KASSERT(dofaf || BIOASYNC(bp)); 2167 #endif 2168 2169 /* allocate transport structure */ 2170 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2171 argsize = sizeof(struct puffs_vnmsg_rw); 2172 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2173 (void *)&rw_msg, dofaf ? 0 : 1); 2174 if (error) 2175 goto out; 2176 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2177 2178 /* 2x2 cases: read/write, faf/nofaf */ 2179 if (BUF_ISREAD(bp)) { 2180 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2181 PUFFS_VN_READ, VPTOPNC(vp)); 2182 puffs_msg_setdelta(park_rw, tomove); 2183 if (BIOASYNC(bp)) { 2184 puffs_msg_setcall(park_rw, 2185 puffs_parkdone_asyncbioread, bp); 2186 puffs_msg_enqueue(pmp, park_rw); 2187 dobiodone = 0; 2188 } else { 2189 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2190 NULL, error); 2191 error = checkerr(pmp, error, __func__); 2192 if (error) 2193 goto out; 2194 2195 if (rw_msg->pvnr_resid > tomove) { 2196 puffs_senderr(pmp, PUFFS_ERR_READ, 2197 E2BIG, "resid grew", VPTOPNC(vp)); 2198 ERROUT(EPROTO); 2199 } 2200 2201 moved = tomove - rw_msg->pvnr_resid; 2202 2203 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2204 bp->b_resid = bp->b_bcount - moved; 2205 } 2206 } else { 2207 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2208 PUFFS_VN_WRITE, VPTOPNC(vp)); 2209 /* 2210 * make pages read-only before we write them if we want 2211 * write caching info 2212 */ 2213 if (PUFFS_WCACHEINFO(pmp)) { 2214 struct uvm_object *uobj = &vp->v_uobj; 2215 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2216 struct vm_page *vmp; 2217 int i; 2218 2219 for (i = 0; i < npages; i++) { 2220 vmp= uvm_pageratop((vaddr_t)bp->b_data 2221 + (i << PAGE_SHIFT)); 2222 DPRINTF(("puffs_strategy: write-protecting " 2223 "vp %p page %p, offset %" PRId64"\n", 2224 vp, vmp, vmp->offset)); 2225 mutex_enter(&uobj->vmobjlock); 2226 vmp->flags |= PG_RDONLY; 2227 pmap_page_protect(vmp, VM_PROT_READ); 2228 mutex_exit(&uobj->vmobjlock); 2229 } 2230 } 2231 2232 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2233 if (dofaf) { 2234 puffs_msg_setfaf(park_rw); 2235 } else if (BIOASYNC(bp)) { 2236 puffs_msg_setcall(park_rw, 2237 puffs_parkdone_asyncbiowrite, bp); 2238 dobiodone = 0; 2239 } 2240 2241 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2242 2243 if (dobiodone == 0) 2244 goto out; 2245 2246 /* 2247 * XXXXXXXX: wrong, but kernel can't survive strategy 2248 * failure currently. Here, have one more X: X. 2249 */ 2250 if (error != ENOMEM) 2251 error = 0; 2252 2253 error = checkerr(pmp, error, __func__); 2254 if (error) 2255 goto out; 2256 2257 if (rw_msg->pvnr_resid > tomove) { 2258 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2259 E2BIG, "resid grew", VPTOPNC(vp)); 2260 ERROUT(EPROTO); 2261 } 2262 2263 /* 2264 * FAF moved everything. Frankly, we don't 2265 * really have a choice. 2266 */ 2267 if (dofaf && error == 0) 2268 moved = tomove; 2269 else 2270 moved = tomove - rw_msg->pvnr_resid; 2271 2272 bp->b_resid = bp->b_bcount - moved; 2273 if (bp->b_resid != 0) { 2274 ERROUT(EIO); 2275 } 2276 } 2277 2278 out: 2279 if (park_rw) 2280 puffs_msgmem_release(park_rw); 2281 2282 if (error) 2283 bp->b_error = error; 2284 2285 if (error || dobiodone) 2286 biodone(bp); 2287 2288 return error; 2289 } 2290 2291 int 2292 puffs_vnop_mmap(void *v) 2293 { 2294 struct vop_mmap_args /* { 2295 const struct vnodeop_desc *a_desc; 2296 struct vnode *a_vp; 2297 vm_prot_t a_prot; 2298 kauth_cred_t a_cred; 2299 } */ *ap = v; 2300 PUFFS_MSG_VARS(vn, mmap); 2301 struct vnode *vp = ap->a_vp; 2302 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2303 int error; 2304 2305 if (!PUFFS_USE_PAGECACHE(pmp)) 2306 return genfs_eopnotsupp(v); 2307 2308 if (EXISTSOP(pmp, MMAP)) { 2309 PUFFS_MSG_ALLOC(vn, mmap); 2310 mmap_msg->pvnr_prot = ap->a_prot; 2311 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2312 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2313 PUFFS_VN_MMAP, VPTOPNC(vp)); 2314 2315 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2316 error = checkerr(pmp, error, __func__); 2317 PUFFS_MSG_RELEASE(mmap); 2318 } else { 2319 error = genfs_mmap(v); 2320 } 2321 2322 return error; 2323 } 2324 2325 2326 /* 2327 * The rest don't get a free trip to userspace and back, they 2328 * have to stay within the kernel. 2329 */ 2330 2331 /* 2332 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2333 * well, maybe somehow, somewhere, some day .... 2334 */ 2335 int 2336 puffs_vnop_bmap(void *v) 2337 { 2338 struct vop_bmap_args /* { 2339 const struct vnodeop_desc *a_desc; 2340 struct vnode *a_vp; 2341 daddr_t a_bn; 2342 struct vnode **a_vpp; 2343 daddr_t *a_bnp; 2344 int *a_runp; 2345 } */ *ap = v; 2346 struct puffs_mount *pmp; 2347 2348 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2349 2350 if (ap->a_vpp) 2351 *ap->a_vpp = ap->a_vp; 2352 if (ap->a_bnp) 2353 *ap->a_bnp = ap->a_bn; 2354 if (ap->a_runp) 2355 *ap->a_runp 2356 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2357 2358 return 0; 2359 } 2360 2361 /* 2362 * Handle getpages faults in puffs. We let genfs_getpages() do most 2363 * of the dirty work, but we come in this route to do accounting tasks. 2364 * If the user server has specified functions for cache notifications 2365 * about reads and/or writes, we record which type of operation we got, 2366 * for which page range, and proceed to issue a FAF notification to the 2367 * server about it. 2368 */ 2369 int 2370 puffs_vnop_getpages(void *v) 2371 { 2372 struct vop_getpages_args /* { 2373 const struct vnodeop_desc *a_desc; 2374 struct vnode *a_vp; 2375 voff_t a_offset; 2376 struct vm_page **a_m; 2377 int *a_count; 2378 int a_centeridx; 2379 vm_prot_t a_access_type; 2380 int a_advice; 2381 int a_flags; 2382 } */ *ap = v; 2383 struct puffs_mount *pmp; 2384 struct puffs_node *pn; 2385 struct vnode *vp; 2386 struct vm_page **pgs; 2387 struct puffs_cacheinfo *pcinfo = NULL; 2388 struct puffs_cacherun *pcrun; 2389 void *parkmem = NULL; 2390 size_t runsizes; 2391 int i, npages, si, streakon; 2392 int error, locked, write; 2393 2394 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2395 npages = *ap->a_count; 2396 pgs = ap->a_m; 2397 vp = ap->a_vp; 2398 pn = vp->v_data; 2399 locked = (ap->a_flags & PGO_LOCKED) != 0; 2400 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2401 2402 /* ccg xnaht - gets Wuninitialized wrong */ 2403 pcrun = NULL; 2404 runsizes = 0; 2405 2406 /* 2407 * Check that we aren't trying to fault in pages which our file 2408 * server doesn't know about. This happens if we extend a file by 2409 * skipping some pages and later try to fault in pages which 2410 * are between pn_serversize and vp_size. This check optimizes 2411 * away the common case where a file is being extended. 2412 */ 2413 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2414 struct vattr va; 2415 2416 /* try again later when we can block */ 2417 if (locked) 2418 ERROUT(EBUSY); 2419 2420 mutex_exit(&vp->v_interlock); 2421 vattr_null(&va); 2422 va.va_size = vp->v_size; 2423 error = dosetattr(vp, &va, FSCRED, 0); 2424 if (error) 2425 ERROUT(error); 2426 mutex_enter(&vp->v_interlock); 2427 } 2428 2429 if (write && PUFFS_WCACHEINFO(pmp)) { 2430 #ifdef notnowjohn 2431 /* allocate worst-case memory */ 2432 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2433 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2434 locked ? KM_NOSLEEP : KM_SLEEP); 2435 2436 /* 2437 * can't block if we're locked and can't mess up caching 2438 * information for fs server. so come back later, please 2439 */ 2440 if (pcinfo == NULL) 2441 ERROUT(ENOMEM); 2442 2443 parkmem = puffs_park_alloc(locked == 0); 2444 if (parkmem == NULL) 2445 ERROUT(ENOMEM); 2446 2447 pcrun = pcinfo->pcache_runs; 2448 #else 2449 (void)parkmem; 2450 #endif 2451 } 2452 2453 error = genfs_getpages(v); 2454 if (error) 2455 goto out; 2456 2457 if (PUFFS_WCACHEINFO(pmp) == 0) 2458 goto out; 2459 2460 /* 2461 * Let's see whose fault it was and inform the user server of 2462 * possibly read/written pages. Map pages from read faults 2463 * strictly read-only, since otherwise we might miss info on 2464 * when the page is actually write-faulted to. 2465 */ 2466 if (!locked) 2467 mutex_enter(&vp->v_uobj.vmobjlock); 2468 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2469 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2470 if (streakon && write) { 2471 streakon = 0; 2472 pcrun[si].pcache_runend 2473 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2474 si++; 2475 } 2476 continue; 2477 } 2478 if (streakon == 0 && write) { 2479 streakon = 1; 2480 pcrun[si].pcache_runstart = pgs[i]->offset; 2481 } 2482 2483 if (!write) 2484 pgs[i]->flags |= PG_RDONLY; 2485 } 2486 /* was the last page part of our streak? */ 2487 if (streakon) { 2488 pcrun[si].pcache_runend 2489 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2490 si++; 2491 } 2492 if (!locked) 2493 mutex_exit(&vp->v_uobj.vmobjlock); 2494 2495 KASSERT(si <= (npages / 2) + 1); 2496 2497 #ifdef notnowjohn 2498 /* send results to userspace */ 2499 if (write) 2500 puffs_cacheop(pmp, parkmem, pcinfo, 2501 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2502 #endif 2503 2504 out: 2505 if (error) { 2506 if (pcinfo != NULL) 2507 kmem_free(pcinfo, 2508 sizeof(struct puffs_cacheinfo) + runsizes); 2509 #ifdef notnowjohn 2510 if (parkmem != NULL) 2511 puffs_park_release(parkmem, 1); 2512 #endif 2513 } 2514 2515 return error; 2516 } 2517 2518 int 2519 puffs_vnop_lock(void *v) 2520 { 2521 struct vop_lock_args /* { 2522 struct vnode *a_vp; 2523 int a_flags; 2524 } */ *ap = v; 2525 struct vnode *vp = ap->a_vp; 2526 struct mount *mp = vp->v_mount; 2527 int flags = ap->a_flags; 2528 2529 #if 0 2530 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2531 #endif 2532 2533 if (flags & LK_INTERLOCK) { 2534 mutex_exit(&vp->v_interlock); 2535 flags &= ~LK_INTERLOCK; 2536 } 2537 2538 /* 2539 * XXX: this avoids deadlocking when we're suspending. 2540 * e.g. some ops holding the vnode lock might be blocked for 2541 * the vfs transaction lock so we'd deadlock. 2542 * 2543 * Now once again this is skating on the thin ice of modern life, 2544 * since we are breaking the consistency guarantee provided 2545 * _to the user server_ by vnode locking. Hopefully this will 2546 * get fixed soon enough by getting rid of the dependency on 2547 * vnode locks alltogether. 2548 */ 2549 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2550 return 0; 2551 } 2552 2553 return vlockmgr(&vp->v_lock, flags); 2554 } 2555 2556 int 2557 puffs_vnop_unlock(void *v) 2558 { 2559 struct vop_unlock_args /* { 2560 struct vnode *a_vp; 2561 int a_flags; 2562 } */ *ap = v; 2563 struct vnode *vp = ap->a_vp; 2564 struct mount *mp = vp->v_mount; 2565 2566 #if 0 2567 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2568 #endif 2569 2570 /* XXX: see puffs_lock() */ 2571 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2572 return 0; 2573 } 2574 2575 return vlockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE); 2576 } 2577 2578 int 2579 puffs_vnop_islocked(void *v) 2580 { 2581 struct vop_islocked_args *ap = v; 2582 int rv; 2583 2584 rv = vlockstatus(&ap->a_vp->v_lock); 2585 return rv; 2586 } 2587 2588 2589 /* 2590 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2591 * FAF update information for the puffs node first. 2592 */ 2593 int 2594 puffs_vnop_spec_read(void *v) 2595 { 2596 struct vop_read_args /* { 2597 const struct vnodeop_desc *a_desc; 2598 struct vnode *a_vp; 2599 struct uio *a_uio; 2600 int a_ioflag; 2601 kauth_cred_t a_cred; 2602 } */ *ap = v; 2603 2604 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2605 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2606 } 2607 2608 int 2609 puffs_vnop_spec_write(void *v) 2610 { 2611 struct vop_write_args /* { 2612 const struct vnodeop_desc *a_desc; 2613 struct vnode *a_vp; 2614 struct uio *a_uio; 2615 int a_ioflag; 2616 kauth_cred_t a_cred; 2617 } */ *ap = v; 2618 2619 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2620 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2621 } 2622 2623 int 2624 puffs_vnop_fifo_read(void *v) 2625 { 2626 struct vop_read_args /* { 2627 const struct vnodeop_desc *a_desc; 2628 struct vnode *a_vp; 2629 struct uio *a_uio; 2630 int a_ioflag; 2631 kauth_cred_t a_cred; 2632 } */ *ap = v; 2633 2634 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2635 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2636 } 2637 2638 int 2639 puffs_vnop_fifo_write(void *v) 2640 { 2641 struct vop_write_args /* { 2642 const struct vnodeop_desc *a_desc; 2643 struct vnode *a_vp; 2644 struct uio *a_uio; 2645 int a_ioflag; 2646 kauth_cred_t a_cred; 2647 } */ *ap = v; 2648 2649 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2650 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2651 } 2652
Indexes created Tue Sep 30 20:09:53 GMT 2025