puffs_vnops.c revision 1.136
1 /* $NetBSD: puffs_vnops.c,v 1.136 2009/10/17 23:16:05 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 1.136 2009/10/17 23:16:05 pooka Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/buf.h> 37 #include <sys/fstrans.h> 38 #include <sys/malloc.h> 39 #include <sys/mount.h> 40 #include <sys/namei.h> 41 #include <sys/vnode.h> 42 #include <sys/proc.h> 43 44 #include <uvm/uvm.h> 45 46 #include <fs/puffs/puffs_msgif.h> 47 #include <fs/puffs/puffs_sys.h> 48 49 #include <miscfs/fifofs/fifo.h> 50 #include <miscfs/genfs/genfs.h> 51 #include <miscfs/specfs/specdev.h> 52 53 int puffs_vnop_lookup(void *); 54 int puffs_vnop_create(void *); 55 int puffs_vnop_access(void *); 56 int puffs_vnop_mknod(void *); 57 int puffs_vnop_open(void *); 58 int puffs_vnop_close(void *); 59 int puffs_vnop_getattr(void *); 60 int puffs_vnop_setattr(void *); 61 int puffs_vnop_reclaim(void *); 62 int puffs_vnop_readdir(void *); 63 int puffs_vnop_poll(void *); 64 int puffs_vnop_fsync(void *); 65 int puffs_vnop_seek(void *); 66 int puffs_vnop_remove(void *); 67 int puffs_vnop_mkdir(void *); 68 int puffs_vnop_rmdir(void *); 69 int puffs_vnop_link(void *); 70 int puffs_vnop_readlink(void *); 71 int puffs_vnop_symlink(void *); 72 int puffs_vnop_rename(void *); 73 int puffs_vnop_read(void *); 74 int puffs_vnop_write(void *); 75 int puffs_vnop_fcntl(void *); 76 int puffs_vnop_ioctl(void *); 77 int puffs_vnop_inactive(void *); 78 int puffs_vnop_print(void *); 79 int puffs_vnop_pathconf(void *); 80 int puffs_vnop_advlock(void *); 81 int puffs_vnop_strategy(void *); 82 int puffs_vnop_bmap(void *); 83 int puffs_vnop_mmap(void *); 84 int puffs_vnop_getpages(void *); 85 int puffs_vnop_abortop(void *); 86 87 int puffs_vnop_spec_read(void *); 88 int puffs_vnop_spec_write(void *); 89 int puffs_vnop_fifo_read(void *); 90 int puffs_vnop_fifo_write(void *); 91 92 int puffs_vnop_checkop(void *); 93 94 95 #if 0 96 #define puffs_lock genfs_lock 97 #define puffs_unlock genfs_unlock 98 #define puffs_islocked genfs_islocked 99 #else 100 int puffs_vnop_lock(void *); 101 int puffs_vnop_unlock(void *); 102 int puffs_vnop_islocked(void *); 103 #endif 104 105 int (**puffs_vnodeop_p)(void *); 106 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 107 { &vop_default_desc, vn_default_error }, 108 { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ 109 { &vop_create_desc, puffs_vnop_checkop }, /* create */ 110 { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ 111 { &vop_open_desc, puffs_vnop_open }, /* REAL open */ 112 { &vop_close_desc, puffs_vnop_checkop }, /* close */ 113 { &vop_access_desc, puffs_vnop_access }, /* REAL access */ 114 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 115 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 116 { &vop_read_desc, puffs_vnop_checkop }, /* read */ 117 { &vop_write_desc, puffs_vnop_checkop }, /* write */ 118 { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ 119 { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ 120 { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ 121 { &vop_link_desc, puffs_vnop_checkop }, /* link */ 122 { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ 123 { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ 124 { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ 125 { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ 126 { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ 127 { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ 128 { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ 129 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 130 { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ 131 { &vop_advlock_desc, puffs_vnop_checkop }, /* advlock */ 132 { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ 133 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 134 { &vop_abortop_desc, puffs_vnop_abortop }, /* REAL abortop */ 135 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 136 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 137 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 138 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 139 { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ 140 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 141 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 142 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 143 { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ 144 { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ 145 146 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 147 { NULL, NULL } 148 }; 149 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 150 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 151 152 153 int (**puffs_specop_p)(void *); 154 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 155 { &vop_default_desc, vn_default_error }, 156 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 157 { &vop_create_desc, spec_create }, /* genfs_badop */ 158 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 159 { &vop_open_desc, spec_open }, /* spec_open */ 160 { &vop_close_desc, spec_close }, /* spec_close */ 161 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 162 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 163 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 164 { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ 165 { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ 166 { &vop_ioctl_desc, spec_ioctl }, /* spec_ioctl */ 167 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 168 { &vop_poll_desc, spec_poll }, /* spec_poll */ 169 { &vop_kqfilter_desc, spec_kqfilter }, /* spec_kqfilter */ 170 { &vop_revoke_desc, spec_revoke }, /* genfs_revoke */ 171 { &vop_mmap_desc, spec_mmap }, /* spec_mmap */ 172 { &vop_fsync_desc, spec_fsync }, /* vflushbuf */ 173 { &vop_seek_desc, spec_seek }, /* genfs_nullop */ 174 { &vop_remove_desc, spec_remove }, /* genfs_badop */ 175 { &vop_link_desc, spec_link }, /* genfs_badop */ 176 { &vop_rename_desc, spec_rename }, /* genfs_badop */ 177 { &vop_mkdir_desc, spec_mkdir }, /* genfs_badop */ 178 { &vop_rmdir_desc, spec_rmdir }, /* genfs_badop */ 179 { &vop_symlink_desc, spec_symlink }, /* genfs_badop */ 180 { &vop_readdir_desc, spec_readdir }, /* genfs_badop */ 181 { &vop_readlink_desc, spec_readlink }, /* genfs_badop */ 182 { &vop_abortop_desc, spec_abortop }, /* genfs_badop */ 183 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 184 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 185 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 186 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 187 { &vop_bmap_desc, spec_bmap }, /* dummy */ 188 { &vop_strategy_desc, spec_strategy }, /* dev strategy */ 189 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 190 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 191 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 192 { &vop_advlock_desc, spec_advlock }, /* lf_advlock */ 193 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 194 { &vop_getpages_desc, spec_getpages }, /* genfs_getpages */ 195 { &vop_putpages_desc, spec_putpages }, /* genfs_putpages */ 196 #if 0 197 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 198 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 199 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 200 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 201 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 202 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 203 #endif 204 { NULL, NULL } 205 }; 206 const struct vnodeopv_desc puffs_specop_opv_desc = 207 { &puffs_specop_p, puffs_specop_entries }; 208 209 210 int (**puffs_fifoop_p)(void *); 211 const struct vnodeopv_entry_desc puffs_fifoop_entries[] = { 212 { &vop_default_desc, vn_default_error }, 213 { &vop_lookup_desc, fifo_lookup }, /* lookup, ENOTDIR */ 214 { &vop_create_desc, fifo_create }, /* genfs_badop */ 215 { &vop_mknod_desc, fifo_mknod }, /* genfs_badop */ 216 { &vop_open_desc, fifo_open }, /* open */ 217 { &vop_close_desc, fifo_close }, /* close */ 218 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 219 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 220 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 221 { &vop_read_desc, puffs_vnop_fifo_read }, /* read, update */ 222 { &vop_write_desc, puffs_vnop_fifo_write }, /* write, update */ 223 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 224 { &vop_fcntl_desc, genfs_fcntl }, /* dummy */ 225 { &vop_poll_desc, fifo_poll }, /* poll */ 226 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 227 { &vop_revoke_desc, fifo_revoke }, /* genfs_revoke */ 228 { &vop_mmap_desc, fifo_mmap }, /* genfs_badop */ 229 { &vop_fsync_desc, fifo_fsync }, /* genfs_nullop*/ 230 { &vop_seek_desc, fifo_seek }, /* genfs_badop */ 231 { &vop_remove_desc, fifo_remove }, /* genfs_badop */ 232 { &vop_link_desc, fifo_link }, /* genfs_badop */ 233 { &vop_rename_desc, fifo_rename }, /* genfs_badop */ 234 { &vop_mkdir_desc, fifo_mkdir }, /* genfs_badop */ 235 { &vop_rmdir_desc, fifo_rmdir }, /* genfs_badop */ 236 { &vop_symlink_desc, fifo_symlink }, /* genfs_badop */ 237 { &vop_readdir_desc, fifo_readdir }, /* genfs_badop */ 238 { &vop_readlink_desc, fifo_readlink }, /* genfs_badop */ 239 { &vop_abortop_desc, fifo_abortop }, /* genfs_badop */ 240 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 241 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 242 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 243 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 244 { &vop_bmap_desc, fifo_bmap }, /* dummy */ 245 { &vop_strategy_desc, fifo_strategy }, /* genfs_badop */ 246 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 247 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 248 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 249 { &vop_advlock_desc, fifo_advlock }, /* genfs_einval */ 250 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 251 { &vop_putpages_desc, fifo_putpages }, /* genfs_null_putpages*/ 252 #if 0 253 { &vop_openextattr_desc, _openextattr }, /* openextattr */ 254 { &vop_closeextattr_desc, _closeextattr }, /* closeextattr */ 255 { &vop_getextattr_desc, _getextattr }, /* getextattr */ 256 { &vop_setextattr_desc, _setextattr }, /* setextattr */ 257 { &vop_listextattr_desc, _listextattr }, /* listextattr */ 258 { &vop_deleteextattr_desc, _deleteextattr }, /* deleteextattr */ 259 #endif 260 { NULL, NULL } 261 }; 262 const struct vnodeopv_desc puffs_fifoop_opv_desc = 263 { &puffs_fifoop_p, puffs_fifoop_entries }; 264 265 266 /* "real" vnode operations */ 267 int (**puffs_msgop_p)(void *); 268 const struct vnodeopv_entry_desc puffs_msgop_entries[] = { 269 { &vop_default_desc, vn_default_error }, 270 { &vop_create_desc, puffs_vnop_create }, /* create */ 271 { &vop_mknod_desc, puffs_vnop_mknod }, /* mknod */ 272 { &vop_open_desc, puffs_vnop_open }, /* open */ 273 { &vop_close_desc, puffs_vnop_close }, /* close */ 274 { &vop_access_desc, puffs_vnop_access }, /* access */ 275 { &vop_getattr_desc, puffs_vnop_getattr }, /* getattr */ 276 { &vop_setattr_desc, puffs_vnop_setattr }, /* setattr */ 277 { &vop_read_desc, puffs_vnop_read }, /* read */ 278 { &vop_write_desc, puffs_vnop_write }, /* write */ 279 { &vop_seek_desc, puffs_vnop_seek }, /* seek */ 280 { &vop_remove_desc, puffs_vnop_remove }, /* remove */ 281 { &vop_link_desc, puffs_vnop_link }, /* link */ 282 { &vop_rename_desc, puffs_vnop_rename }, /* rename */ 283 { &vop_mkdir_desc, puffs_vnop_mkdir }, /* mkdir */ 284 { &vop_rmdir_desc, puffs_vnop_rmdir }, /* rmdir */ 285 { &vop_symlink_desc, puffs_vnop_symlink }, /* symlink */ 286 { &vop_readdir_desc, puffs_vnop_readdir }, /* readdir */ 287 { &vop_readlink_desc, puffs_vnop_readlink }, /* readlink */ 288 { &vop_print_desc, puffs_vnop_print }, /* print */ 289 { &vop_islocked_desc, puffs_vnop_islocked }, /* islocked */ 290 { &vop_pathconf_desc, puffs_vnop_pathconf }, /* pathconf */ 291 { &vop_advlock_desc, puffs_vnop_advlock }, /* advlock */ 292 { &vop_getpages_desc, puffs_vnop_getpages }, /* getpages */ 293 { NULL, NULL } 294 }; 295 const struct vnodeopv_desc puffs_msgop_opv_desc = 296 { &puffs_msgop_p, puffs_msgop_entries }; 297 298 299 #define ERROUT(err) \ 300 do { \ 301 error = err; \ 302 goto out; \ 303 } while (/*CONSTCOND*/0) 304 305 /* 306 * This is a generic vnode operation handler. It checks if the necessary 307 * operations for the called vnode operation are implemented by userspace 308 * and either returns a dummy return value or proceeds to call the real 309 * vnode operation from puffs_msgop_v. 310 * 311 * XXX: this should described elsewhere and autogenerated, the complexity 312 * of the vnode operations vectors and their interrelationships is also 313 * getting a bit out of hand. Another problem is that we need this same 314 * information in the fs server code, so keeping the two in sync manually 315 * is not a viable (long term) plan. 316 */ 317 318 /* not supported, handle locking protocol */ 319 #define CHECKOP_NOTSUPP(op) \ 320 case VOP_##op##_DESCOFFSET: \ 321 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 322 return genfs_eopnotsupp(v); \ 323 break 324 325 /* always succeed, no locking */ 326 #define CHECKOP_SUCCESS(op) \ 327 case VOP_##op##_DESCOFFSET: \ 328 if (pmp->pmp_vnopmask[PUFFS_VN_##op] == 0) \ 329 return 0; \ 330 break 331 332 int 333 puffs_vnop_checkop(void *v) 334 { 335 struct vop_generic_args /* { 336 struct vnodeop_desc *a_desc; 337 spooky mystery contents; 338 } */ *ap = v; 339 struct vnodeop_desc *desc = ap->a_desc; 340 struct puffs_mount *pmp; 341 struct vnode *vp; 342 int offset, rv; 343 344 offset = ap->a_desc->vdesc_vp_offsets[0]; 345 #ifdef DIAGNOSTIC 346 if (offset == VDESC_NO_OFFSET) 347 panic("puffs_checkop: no vnode, why did you call me?"); 348 #endif 349 vp = *VOPARG_OFFSETTO(struct vnode **, offset, ap); 350 pmp = MPTOPUFFSMP(vp->v_mount); 351 352 DPRINTF_VERBOSE(("checkop call %s (%d), vp %p\n", 353 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp)); 354 355 if (!ALLOPS(pmp)) { 356 switch (desc->vdesc_offset) { 357 CHECKOP_NOTSUPP(CREATE); 358 CHECKOP_NOTSUPP(MKNOD); 359 CHECKOP_NOTSUPP(GETATTR); 360 CHECKOP_NOTSUPP(SETATTR); 361 CHECKOP_NOTSUPP(READ); 362 CHECKOP_NOTSUPP(WRITE); 363 CHECKOP_NOTSUPP(FCNTL); 364 CHECKOP_NOTSUPP(IOCTL); 365 CHECKOP_NOTSUPP(REMOVE); 366 CHECKOP_NOTSUPP(LINK); 367 CHECKOP_NOTSUPP(RENAME); 368 CHECKOP_NOTSUPP(MKDIR); 369 CHECKOP_NOTSUPP(RMDIR); 370 CHECKOP_NOTSUPP(SYMLINK); 371 CHECKOP_NOTSUPP(READDIR); 372 CHECKOP_NOTSUPP(READLINK); 373 CHECKOP_NOTSUPP(PRINT); 374 CHECKOP_NOTSUPP(PATHCONF); 375 CHECKOP_NOTSUPP(ADVLOCK); 376 377 CHECKOP_SUCCESS(ACCESS); 378 CHECKOP_SUCCESS(CLOSE); 379 CHECKOP_SUCCESS(SEEK); 380 381 case VOP_GETPAGES_DESCOFFSET: 382 if (!EXISTSOP(pmp, READ)) 383 return genfs_eopnotsupp(v); 384 break; 385 386 default: 387 panic("puffs_checkop: unhandled vnop %d", 388 desc->vdesc_offset); 389 } 390 } 391 392 rv = VOCALL(puffs_msgop_p, ap->a_desc->vdesc_offset, v); 393 394 DPRINTF_VERBOSE(("checkop return %s (%d), vp %p: %d\n", 395 ap->a_desc->vdesc_name, ap->a_desc->vdesc_offset, vp, rv)); 396 397 return rv; 398 } 399 400 static int callremove(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 401 struct componentname *); 402 static int callrmdir(struct puffs_mount *, puffs_cookie_t, puffs_cookie_t, 403 struct componentname *); 404 static void callinactive(struct puffs_mount *, puffs_cookie_t, int); 405 static void callreclaim(struct puffs_mount *, puffs_cookie_t); 406 407 #define PUFFS_ABORT_LOOKUP 1 408 #define PUFFS_ABORT_CREATE 2 409 #define PUFFS_ABORT_MKNOD 3 410 #define PUFFS_ABORT_MKDIR 4 411 #define PUFFS_ABORT_SYMLINK 5 412 413 /* 414 * Press the pani^Wabort button! Kernel resource allocation failed. 415 */ 416 static void 417 puffs_abortbutton(struct puffs_mount *pmp, int what, 418 puffs_cookie_t dck, puffs_cookie_t ck, struct componentname *cnp) 419 { 420 421 switch (what) { 422 case PUFFS_ABORT_CREATE: 423 case PUFFS_ABORT_MKNOD: 424 case PUFFS_ABORT_SYMLINK: 425 callremove(pmp, dck, ck, cnp); 426 break; 427 case PUFFS_ABORT_MKDIR: 428 callrmdir(pmp, dck, ck, cnp); 429 break; 430 } 431 432 callinactive(pmp, ck, 0); 433 callreclaim(pmp, ck); 434 } 435 436 /* 437 * Begin vnode operations. 438 * 439 * A word from the keymaster about locks: generally we don't want 440 * to use the vnode locks at all: it creates an ugly dependency between 441 * the userlandia file server and the kernel. But we'll play along with 442 * the kernel vnode locks for now. However, even currently we attempt 443 * to release locks as early as possible. This is possible for some 444 * operations which a) don't need a locked vnode after the userspace op 445 * and b) return with the vnode unlocked. Theoretically we could 446 * unlock-do op-lock for others and order the graph in userspace, but I 447 * don't want to think of the consequences for the time being. 448 */ 449 450 int 451 puffs_vnop_lookup(void *v) 452 { 453 struct vop_lookup_args /* { 454 const struct vnodeop_desc *a_desc; 455 struct vnode *a_dvp; 456 struct vnode **a_vpp; 457 struct componentname *a_cnp; 458 } */ *ap = v; 459 PUFFS_MSG_VARS(vn, lookup); 460 struct puffs_mount *pmp; 461 struct componentname *cnp; 462 struct vnode *vp, *dvp; 463 struct puffs_node *dpn; 464 int isdot; 465 int error; 466 467 pmp = MPTOPUFFSMP(ap->a_dvp->v_mount); 468 cnp = ap->a_cnp; 469 dvp = ap->a_dvp; 470 *ap->a_vpp = NULL; 471 472 /* r/o fs? we check create later to handle EEXIST */ 473 if ((cnp->cn_flags & ISLASTCN) 474 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 475 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 476 return EROFS; 477 478 isdot = cnp->cn_namelen == 1 && *cnp->cn_nameptr == '.'; 479 480 DPRINTF(("puffs_lookup: \"%s\", parent vnode %p, op: %x\n", 481 cnp->cn_nameptr, dvp, cnp->cn_nameiop)); 482 483 /* 484 * Check if someone fed it into the cache 485 */ 486 if (PUFFS_USE_NAMECACHE(pmp)) { 487 error = cache_lookup(dvp, ap->a_vpp, cnp); 488 489 if (error >= 0) 490 return error; 491 } 492 493 if (isdot) { 494 vp = ap->a_dvp; 495 vref(vp); 496 *ap->a_vpp = vp; 497 return 0; 498 } 499 500 PUFFS_MSG_ALLOC(vn, lookup); 501 puffs_makecn(&lookup_msg->pvnr_cn, &lookup_msg->pvnr_cn_cred, 502 cnp, PUFFS_USE_FULLPNBUF(pmp)); 503 504 if (cnp->cn_flags & ISDOTDOT) 505 VOP_UNLOCK(dvp, 0); 506 507 puffs_msg_setinfo(park_lookup, PUFFSOP_VN, 508 PUFFS_VN_LOOKUP, VPTOPNC(dvp)); 509 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_lookup, dvp->v_data, NULL, error); 510 DPRINTF(("puffs_lookup: return of the userspace, part %d\n", error)); 511 512 /* 513 * In case of error, there is no new vnode to play with, so be 514 * happy with the NULL value given to vpp in the beginning. 515 * Also, check if this really was an error or the target was not 516 * present. Either treat it as a non-error for CREATE/RENAME or 517 * enter the component into the negative name cache (if desired). 518 */ 519 if (error) { 520 error = checkerr(pmp, error, __func__); 521 if (error == ENOENT) { 522 /* don't allow to create files on r/o fs */ 523 if ((dvp->v_mount->mnt_flag & MNT_RDONLY) 524 && cnp->cn_nameiop == CREATE) { 525 error = EROFS; 526 527 /* adjust values if we are creating */ 528 } else if ((cnp->cn_flags & ISLASTCN) 529 && (cnp->cn_nameiop == CREATE 530 || cnp->cn_nameiop == RENAME)) { 531 cnp->cn_flags |= SAVENAME; 532 error = EJUSTRETURN; 533 534 /* save negative cache entry */ 535 } else { 536 if ((cnp->cn_flags & MAKEENTRY) 537 && PUFFS_USE_NAMECACHE(pmp)) 538 cache_enter(dvp, NULL, cnp); 539 } 540 } 541 goto out; 542 } 543 544 /* 545 * Check that we don't get our parent node back, that would cause 546 * a pretty obvious deadlock. 547 */ 548 dpn = dvp->v_data; 549 if (lookup_msg->pvnr_newnode == dpn->pn_cookie) { 550 puffs_senderr(pmp, PUFFS_ERR_LOOKUP, EINVAL, 551 "lookup produced parent cookie", lookup_msg->pvnr_newnode); 552 error = EPROTO; 553 goto out; 554 } 555 556 error = puffs_cookie2vnode(pmp, lookup_msg->pvnr_newnode, 1, 1, &vp); 557 if (error == PUFFS_NOSUCHCOOKIE) { 558 error = puffs_getvnode(dvp->v_mount, 559 lookup_msg->pvnr_newnode, lookup_msg->pvnr_vtype, 560 lookup_msg->pvnr_size, lookup_msg->pvnr_rdev, &vp); 561 if (error) { 562 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 563 lookup_msg->pvnr_newnode, ap->a_cnp); 564 goto out; 565 } 566 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 567 } else if (error) { 568 puffs_abortbutton(pmp, PUFFS_ABORT_LOOKUP, VPTOPNC(dvp), 569 lookup_msg->pvnr_newnode, ap->a_cnp); 570 goto out; 571 } 572 573 *ap->a_vpp = vp; 574 575 if ((cnp->cn_flags & MAKEENTRY) != 0 && PUFFS_USE_NAMECACHE(pmp)) 576 cache_enter(dvp, vp, cnp); 577 578 /* XXX */ 579 if ((lookup_msg->pvnr_cn.pkcn_flags & REQUIREDIR) == 0) 580 cnp->cn_flags &= ~REQUIREDIR; 581 if (lookup_msg->pvnr_cn.pkcn_consume) 582 cnp->cn_consume = MIN(lookup_msg->pvnr_cn.pkcn_consume, 583 strlen(cnp->cn_nameptr) - cnp->cn_namelen); 584 585 /* 586 * We need the name in remove and rmdir (well, rename too, but 587 * SAVESTART takes care of that) 588 */ 589 if (cnp->cn_nameiop == DELETE) 590 cnp->cn_flags |= SAVENAME; 591 592 out: 593 if (cnp->cn_flags & ISDOTDOT) 594 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 595 596 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 597 PUFFS_MSG_RELEASE(lookup); 598 return error; 599 } 600 601 #define REFPN_AND_UNLOCKVP(a, b) \ 602 do { \ 603 mutex_enter(&b->pn_mtx); \ 604 puffs_referencenode(b); \ 605 mutex_exit(&b->pn_mtx); \ 606 VOP_UNLOCK(a, 0); \ 607 } while (/*CONSTCOND*/0) 608 609 #define REFPN(b) \ 610 do { \ 611 mutex_enter(&b->pn_mtx); \ 612 puffs_referencenode(b); \ 613 mutex_exit(&b->pn_mtx); \ 614 } while (/*CONSTCOND*/0) 615 616 #define RELEPN_AND_VP(a, b) \ 617 do { \ 618 puffs_releasenode(b); \ 619 vrele(a); \ 620 } while (/*CONSTCOND*/0) 621 622 int 623 puffs_vnop_create(void *v) 624 { 625 struct vop_create_args /* { 626 const struct vnodeop_desc *a_desc; 627 struct vnode *a_dvp; 628 struct vnode **a_vpp; 629 struct componentname *a_cnp; 630 struct vattr *a_vap; 631 } */ *ap = v; 632 PUFFS_MSG_VARS(vn, create); 633 struct vnode *dvp = ap->a_dvp; 634 struct puffs_node *dpn = VPTOPP(dvp); 635 struct componentname *cnp = ap->a_cnp; 636 struct mount *mp = dvp->v_mount; 637 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 638 int error; 639 640 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 641 dvp, ap->a_cnp->cn_nameptr)); 642 643 PUFFS_MSG_ALLOC(vn, create); 644 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 645 cnp, PUFFS_USE_FULLPNBUF(pmp)); 646 create_msg->pvnr_va = *ap->a_vap; 647 puffs_msg_setinfo(park_create, PUFFSOP_VN, 648 PUFFS_VN_CREATE, VPTOPNC(dvp)); 649 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_create, dvp->v_data, NULL, error); 650 651 error = checkerr(pmp, error, __func__); 652 if (error) 653 goto out; 654 655 error = puffs_newnode(mp, dvp, ap->a_vpp, 656 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 657 if (error) 658 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 659 create_msg->pvnr_newnode, cnp); 660 661 out: 662 vput(dvp); 663 if (error || (cnp->cn_flags & SAVESTART) == 0) 664 PNBUF_PUT(cnp->cn_pnbuf); 665 666 DPRINTF(("puffs_create: return %d\n", error)); 667 PUFFS_MSG_RELEASE(create); 668 return error; 669 } 670 671 int 672 puffs_vnop_mknod(void *v) 673 { 674 struct vop_mknod_args /* { 675 const struct vnodeop_desc *a_desc; 676 struct vnode *a_dvp; 677 struct vnode **a_vpp; 678 struct componentname *a_cnp; 679 struct vattr *a_vap; 680 } */ *ap = v; 681 PUFFS_MSG_VARS(vn, mknod); 682 struct vnode *dvp = ap->a_dvp; 683 struct puffs_node *dpn = VPTOPP(dvp); 684 struct componentname *cnp = ap->a_cnp; 685 struct mount *mp = dvp->v_mount; 686 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 687 int error; 688 689 PUFFS_MSG_ALLOC(vn, mknod); 690 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 691 cnp, PUFFS_USE_FULLPNBUF(pmp)); 692 mknod_msg->pvnr_va = *ap->a_vap; 693 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 694 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 695 696 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mknod, dvp->v_data, NULL, error); 697 698 error = checkerr(pmp, error, __func__); 699 if (error) 700 goto out; 701 702 error = puffs_newnode(mp, dvp, ap->a_vpp, 703 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 704 ap->a_vap->va_rdev); 705 if (error) 706 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 707 mknod_msg->pvnr_newnode, cnp); 708 709 out: 710 vput(dvp); 711 PUFFS_MSG_RELEASE(mknod); 712 if (error || (cnp->cn_flags & SAVESTART) == 0) 713 PNBUF_PUT(cnp->cn_pnbuf); 714 return error; 715 } 716 717 int 718 puffs_vnop_open(void *v) 719 { 720 struct vop_open_args /* { 721 const struct vnodeop_desc *a_desc; 722 struct vnode *a_vp; 723 int a_mode; 724 kauth_cred_t a_cred; 725 } */ *ap = v; 726 PUFFS_MSG_VARS(vn, open); 727 struct vnode *vp = ap->a_vp; 728 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 729 int mode = ap->a_mode; 730 int error; 731 732 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 733 734 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 735 ERROUT(EROFS); 736 737 if (!EXISTSOP(pmp, OPEN)) 738 ERROUT(0); 739 740 PUFFS_MSG_ALLOC(vn, open); 741 open_msg->pvnr_mode = mode; 742 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 743 puffs_msg_setinfo(park_open, PUFFSOP_VN, 744 PUFFS_VN_OPEN, VPTOPNC(vp)); 745 746 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 747 error = checkerr(pmp, error, __func__); 748 749 out: 750 DPRINTF(("puffs_open: returning %d\n", error)); 751 PUFFS_MSG_RELEASE(open); 752 return error; 753 } 754 755 int 756 puffs_vnop_close(void *v) 757 { 758 struct vop_close_args /* { 759 const struct vnodeop_desc *a_desc; 760 struct vnode *a_vp; 761 int a_fflag; 762 kauth_cred_t a_cred; 763 } */ *ap = v; 764 PUFFS_MSG_VARS(vn, close); 765 struct vnode *vp = ap->a_vp; 766 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 767 768 PUFFS_MSG_ALLOC(vn, close); 769 puffs_msg_setfaf(park_close); 770 close_msg->pvnr_fflag = ap->a_fflag; 771 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 772 puffs_msg_setinfo(park_close, PUFFSOP_VN, 773 PUFFS_VN_CLOSE, VPTOPNC(vp)); 774 775 puffs_msg_enqueue(pmp, park_close); 776 PUFFS_MSG_RELEASE(close); 777 return 0; 778 } 779 780 int 781 puffs_vnop_access(void *v) 782 { 783 struct vop_access_args /* { 784 const struct vnodeop_desc *a_desc; 785 struct vnode *a_vp; 786 int a_mode; 787 kauth_cred_t a_cred; 788 } */ *ap = v; 789 PUFFS_MSG_VARS(vn, access); 790 struct vnode *vp = ap->a_vp; 791 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 792 int mode = ap->a_mode; 793 int error; 794 795 if (mode & VWRITE) { 796 switch (vp->v_type) { 797 case VDIR: 798 case VLNK: 799 case VREG: 800 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 801 || !EXISTSOP(pmp, WRITE)) 802 return EROFS; 803 break; 804 default: 805 break; 806 } 807 } 808 809 if (!EXISTSOP(pmp, ACCESS)) 810 return 0; 811 812 PUFFS_MSG_ALLOC(vn, access); 813 access_msg->pvnr_mode = ap->a_mode; 814 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 815 puffs_msg_setinfo(park_access, PUFFSOP_VN, 816 PUFFS_VN_ACCESS, VPTOPNC(vp)); 817 818 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 819 error = checkerr(pmp, error, __func__); 820 PUFFS_MSG_RELEASE(access); 821 822 return error; 823 } 824 825 int 826 puffs_vnop_getattr(void *v) 827 { 828 struct vop_getattr_args /* { 829 const struct vnodeop_desc *a_desc; 830 struct vnode *a_vp; 831 struct vattr *a_vap; 832 kauth_cred_t a_cred; 833 } */ *ap = v; 834 PUFFS_MSG_VARS(vn, getattr); 835 struct vnode *vp = ap->a_vp; 836 struct mount *mp = vp->v_mount; 837 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 838 struct vattr *vap, *rvap; 839 struct puffs_node *pn; 840 int error = 0; 841 842 vap = ap->a_vap; 843 844 PUFFS_MSG_ALLOC(vn, getattr); 845 vattr_null(&getattr_msg->pvnr_va); 846 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 847 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 848 PUFFS_VN_GETATTR, VPTOPNC(vp)); 849 850 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 851 error = checkerr(pmp, error, __func__); 852 if (error) 853 goto out; 854 855 rvap = &getattr_msg->pvnr_va; 856 /* 857 * Don't listen to the file server regarding special device 858 * size info, the file server doesn't know anything about them. 859 */ 860 if (vp->v_type == VBLK || vp->v_type == VCHR) 861 rvap->va_size = vp->v_size; 862 863 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 864 if (vp->v_type == VBLK) 865 rvap->va_blocksize = BLKDEV_IOSIZE; 866 else if (vp->v_type == VCHR) 867 rvap->va_blocksize = MAXBSIZE; 868 869 (void) memcpy(vap, rvap, sizeof(struct vattr)); 870 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 871 872 pn = VPTOPP(vp); 873 if (pn->pn_stat & PNODE_METACACHE_ATIME) 874 vap->va_atime = pn->pn_mc_atime; 875 if (pn->pn_stat & PNODE_METACACHE_CTIME) 876 vap->va_ctime = pn->pn_mc_ctime; 877 if (pn->pn_stat & PNODE_METACACHE_MTIME) 878 vap->va_mtime = pn->pn_mc_mtime; 879 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 880 vap->va_size = pn->pn_mc_size; 881 } else { 882 if (rvap->va_size != VNOVAL 883 && vp->v_type != VBLK && vp->v_type != VCHR) { 884 uvm_vnp_setsize(vp, rvap->va_size); 885 pn->pn_serversize = rvap->va_size; 886 } 887 } 888 889 out: 890 PUFFS_MSG_RELEASE(getattr); 891 return error; 892 } 893 894 static int 895 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int chsize) 896 { 897 PUFFS_MSG_VARS(vn, setattr); 898 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 899 struct puffs_node *pn = vp->v_data; 900 int error; 901 902 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 903 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 904 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 905 || vap->va_mode != (mode_t)VNOVAL)) 906 return EROFS; 907 908 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 909 && vp->v_type == VREG && vap->va_size != VNOVAL) 910 return EROFS; 911 912 /* 913 * Flush metacache first. If we are called with some explicit 914 * parameters, treat them as information overriding metacache 915 * information. 916 */ 917 if (pn->pn_stat & PNODE_METACACHE_MASK) { 918 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 919 && vap->va_atime.tv_sec == VNOVAL) 920 vap->va_atime = pn->pn_mc_atime; 921 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 922 && vap->va_ctime.tv_sec == VNOVAL) 923 vap->va_ctime = pn->pn_mc_ctime; 924 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 925 && vap->va_mtime.tv_sec == VNOVAL) 926 vap->va_mtime = pn->pn_mc_mtime; 927 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 928 && vap->va_size == VNOVAL) 929 vap->va_size = pn->pn_mc_size; 930 931 pn->pn_stat &= ~PNODE_METACACHE_MASK; 932 } 933 934 PUFFS_MSG_ALLOC(vn, setattr); 935 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 936 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 937 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 938 PUFFS_VN_SETATTR, VPTOPNC(vp)); 939 940 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setattr, vp->v_data, NULL, error); 941 PUFFS_MSG_RELEASE(setattr); 942 error = checkerr(pmp, error, __func__); 943 if (error) 944 return error; 945 946 if (vap->va_size != VNOVAL) { 947 pn->pn_serversize = vap->va_size; 948 if (chsize) 949 uvm_vnp_setsize(vp, vap->va_size); 950 } 951 952 return 0; 953 } 954 955 int 956 puffs_vnop_setattr(void *v) 957 { 958 struct vop_getattr_args /* { 959 const struct vnodeop_desc *a_desc; 960 struct vnode *a_vp; 961 struct vattr *a_vap; 962 kauth_cred_t a_cred; 963 } */ *ap = v; 964 965 return dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, 1); 966 } 967 968 static __inline int 969 doinact(struct puffs_mount *pmp, int iaflag) 970 { 971 972 if (EXISTSOP(pmp, INACTIVE)) 973 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 974 if (iaflag || ALLOPS(pmp)) 975 return 1; 976 else 977 return 0; 978 else 979 return 1; 980 else 981 return 0; 982 } 983 984 static void 985 callinactive(struct puffs_mount *pmp, puffs_cookie_t ck, int iaflag) 986 { 987 int error; 988 PUFFS_MSG_VARS(vn, inactive); 989 990 if (doinact(pmp, iaflag)) { 991 PUFFS_MSG_ALLOC(vn, inactive); 992 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 993 PUFFS_VN_INACTIVE, ck); 994 995 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 996 PUFFS_MSG_RELEASE(inactive); 997 } 998 } 999 1000 /* XXX: callinactive can't setback */ 1001 int 1002 puffs_vnop_inactive(void *v) 1003 { 1004 struct vop_inactive_args /* { 1005 const struct vnodeop_desc *a_desc; 1006 struct vnode *a_vp; 1007 } */ *ap = v; 1008 PUFFS_MSG_VARS(vn, inactive); 1009 struct vnode *vp = ap->a_vp; 1010 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1011 struct puffs_node *pnode; 1012 int error; 1013 1014 pnode = vp->v_data; 1015 1016 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1017 PUFFS_MSG_ALLOC(vn, inactive); 1018 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1019 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1020 1021 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1022 NULL, error); 1023 PUFFS_MSG_RELEASE(inactive); 1024 } 1025 pnode->pn_stat &= ~PNODE_DOINACT; 1026 1027 /* 1028 * file server thinks it's gone? then don't be afraid care, 1029 * node's life was already all it would ever be 1030 */ 1031 *ap->a_recycle = ((pnode->pn_stat & PNODE_NOREFS) != 0); 1032 1033 VOP_UNLOCK(vp, 0); 1034 1035 return 0; 1036 } 1037 1038 static void 1039 callreclaim(struct puffs_mount *pmp, puffs_cookie_t ck) 1040 { 1041 PUFFS_MSG_VARS(vn, reclaim); 1042 1043 if (!EXISTSOP(pmp, RECLAIM)) 1044 return; 1045 1046 PUFFS_MSG_ALLOC(vn, reclaim); 1047 puffs_msg_setfaf(park_reclaim); 1048 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, ck); 1049 1050 puffs_msg_enqueue(pmp, park_reclaim); 1051 PUFFS_MSG_RELEASE(reclaim); 1052 } 1053 1054 /* 1055 * always FAF, we don't really care if the server wants to fail to 1056 * reclaim the node or not 1057 */ 1058 int 1059 puffs_vnop_reclaim(void *v) 1060 { 1061 struct vop_reclaim_args /* { 1062 const struct vnodeop_desc *a_desc; 1063 struct vnode *a_vp; 1064 } */ *ap = v; 1065 struct vnode *vp = ap->a_vp; 1066 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1067 struct puffs_node *pnode = vp->v_data; 1068 bool notifyserver = true; 1069 1070 /* 1071 * first things first: check if someone is trying to reclaim the 1072 * root vnode. do not allow that to travel to userspace. 1073 * Note that we don't need to take the lock similarly to 1074 * puffs_root(), since there is only one of us. 1075 */ 1076 if (vp->v_vflag & VV_ROOT) { 1077 mutex_enter(&pmp->pmp_lock); 1078 KASSERT(pmp->pmp_root != NULL); 1079 pmp->pmp_root = NULL; 1080 mutex_exit(&pmp->pmp_lock); 1081 notifyserver = false; 1082 } 1083 1084 /* 1085 * purge info from kernel before issueing FAF, since we 1086 * don't really know when we'll get around to it after 1087 * that and someone might race us into node creation 1088 */ 1089 mutex_enter(&pmp->pmp_lock); 1090 LIST_REMOVE(pnode, pn_hashent); 1091 mutex_exit(&pmp->pmp_lock); 1092 if (PUFFS_USE_NAMECACHE(pmp)) 1093 cache_purge(vp); 1094 1095 if (notifyserver) 1096 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp)); 1097 1098 puffs_putvnode(vp); 1099 1100 return 0; 1101 } 1102 1103 #define CSIZE sizeof(**ap->a_cookies) 1104 int 1105 puffs_vnop_readdir(void *v) 1106 { 1107 struct vop_readdir_args /* { 1108 const struct vnodeop_desc *a_desc; 1109 struct vnode *a_vp; 1110 struct uio *a_uio; 1111 kauth_cred_t a_cred; 1112 int *a_eofflag; 1113 off_t **a_cookies; 1114 int *a_ncookies; 1115 } */ *ap = v; 1116 PUFFS_MSG_VARS(vn, readdir); 1117 struct vnode *vp = ap->a_vp; 1118 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1119 size_t argsize, tomove, cookiemem, cookiesmax; 1120 struct uio *uio = ap->a_uio; 1121 size_t howmuch, resid; 1122 int error; 1123 1124 /* 1125 * ok, so we need: resid + cookiemem = maxreq 1126 * => resid + cookiesize * (resid/minsize) = maxreq 1127 * => resid + cookiesize/minsize * resid = maxreq 1128 * => (cookiesize/minsize + 1) * resid = maxreq 1129 * => resid = maxreq / (cookiesize/minsize + 1) 1130 * 1131 * Since cookiesize <= minsize and we're not very big on floats, 1132 * we approximate that to be 1. Therefore: 1133 * 1134 * resid = maxreq / 2; 1135 * 1136 * Well, at least we didn't have to use differential equations 1137 * or the Gram-Schmidt process. 1138 * 1139 * (yes, I'm very afraid of this) 1140 */ 1141 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1142 1143 if (ap->a_cookies) { 1144 KASSERT(ap->a_ncookies != NULL); 1145 if (pmp->pmp_args.pa_fhsize == 0) 1146 return EOPNOTSUPP; 1147 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1148 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1149 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1150 } else { 1151 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1152 cookiesmax = 0; 1153 cookiemem = 0; 1154 } 1155 1156 argsize = sizeof(struct puffs_vnmsg_readdir); 1157 tomove = resid + cookiemem; 1158 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1159 (void *)&readdir_msg, 1); 1160 1161 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1162 readdir_msg->pvnr_offset = uio->uio_offset; 1163 readdir_msg->pvnr_resid = resid; 1164 readdir_msg->pvnr_ncookies = cookiesmax; 1165 readdir_msg->pvnr_eofflag = 0; 1166 readdir_msg->pvnr_dentoff = cookiemem; 1167 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1168 PUFFS_VN_READDIR, VPTOPNC(vp)); 1169 puffs_msg_setdelta(park_readdir, tomove); 1170 1171 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1172 error = checkerr(pmp, error, __func__); 1173 if (error) 1174 goto out; 1175 1176 /* userspace is cheating? */ 1177 if (readdir_msg->pvnr_resid > resid) { 1178 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1179 "resid grew", VPTOPNC(vp)); 1180 ERROUT(EPROTO); 1181 } 1182 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1183 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1184 "too many cookies", VPTOPNC(vp)); 1185 ERROUT(EPROTO); 1186 } 1187 1188 /* check eof */ 1189 if (readdir_msg->pvnr_eofflag) 1190 *ap->a_eofflag = 1; 1191 1192 /* bouncy-wouncy with the directory data */ 1193 howmuch = resid - readdir_msg->pvnr_resid; 1194 1195 /* force eof if no data was returned (getcwd() needs this) */ 1196 if (howmuch == 0) { 1197 *ap->a_eofflag = 1; 1198 goto out; 1199 } 1200 1201 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1202 if (error) 1203 goto out; 1204 1205 /* provide cookies to caller if so desired */ 1206 if (ap->a_cookies) { 1207 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1208 M_TEMP, M_WAITOK); 1209 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1210 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1211 *ap->a_ncookies*CSIZE); 1212 } 1213 1214 /* next readdir starts here */ 1215 uio->uio_offset = readdir_msg->pvnr_offset; 1216 1217 out: 1218 puffs_msgmem_release(park_readdir); 1219 return error; 1220 } 1221 #undef CSIZE 1222 1223 /* 1224 * poll works by consuming the bitmask in pn_revents. If there are 1225 * events available, poll returns immediately. If not, it issues a 1226 * poll to userspace, selrecords itself and returns with no available 1227 * events. When the file server returns, it executes puffs_parkdone_poll(), 1228 * where available events are added to the bitmask. selnotify() is 1229 * then also executed by that function causing us to enter here again 1230 * and hopefully find the missing bits (unless someone got them first, 1231 * in which case it starts all over again). 1232 */ 1233 int 1234 puffs_vnop_poll(void *v) 1235 { 1236 struct vop_poll_args /* { 1237 const struct vnodeop_desc *a_desc; 1238 struct vnode *a_vp; 1239 int a_events; 1240 } */ *ap = v; 1241 PUFFS_MSG_VARS(vn, poll); 1242 struct vnode *vp = ap->a_vp; 1243 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1244 struct puffs_node *pn = vp->v_data; 1245 int events, error; 1246 1247 if (EXISTSOP(pmp, POLL)) { 1248 mutex_enter(&pn->pn_mtx); 1249 events = pn->pn_revents & ap->a_events; 1250 if (events & ap->a_events) { 1251 pn->pn_revents &= ~ap->a_events; 1252 mutex_exit(&pn->pn_mtx); 1253 1254 return events; 1255 } else { 1256 puffs_referencenode(pn); 1257 mutex_exit(&pn->pn_mtx); 1258 1259 PUFFS_MSG_ALLOC(vn, poll); 1260 poll_msg->pvnr_events = ap->a_events; 1261 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1262 PUFFS_VN_POLL, VPTOPNC(vp)); 1263 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1264 selrecord(curlwp, &pn->pn_sel); 1265 1266 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1267 NULL, error); 1268 PUFFS_MSG_RELEASE(poll); 1269 1270 return 0; 1271 } 1272 } else { 1273 return genfs_poll(v); 1274 } 1275 } 1276 1277 int 1278 puffs_vnop_fsync(void *v) 1279 { 1280 struct vop_fsync_args /* { 1281 const struct vnodeop_desc *a_desc; 1282 struct vnode *a_vp; 1283 kauth_cred_t a_cred; 1284 int a_flags; 1285 off_t a_offlo; 1286 off_t a_offhi; 1287 } */ *ap = v; 1288 PUFFS_MSG_VARS(vn, fsync); 1289 struct vnode *vp = ap->a_vp; 1290 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1291 struct puffs_node *pn; 1292 struct vattr va; 1293 int pflags, error, dofaf; 1294 1295 pn = VPTOPP(vp); 1296 1297 /* flush out information from our metacache, see vop_setattr */ 1298 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1299 vattr_null(&va); 1300 error = VOP_SETATTR(vp, &va, FSCRED); 1301 if (error) 1302 return error; 1303 } 1304 1305 /* 1306 * flush pages to avoid being overly dirty 1307 */ 1308 pflags = PGO_CLEANIT; 1309 if (ap->a_flags & FSYNC_WAIT) 1310 pflags |= PGO_SYNCIO; 1311 mutex_enter(&vp->v_interlock); 1312 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1313 round_page(ap->a_offhi), pflags); 1314 if (error) 1315 return error; 1316 1317 /* 1318 * HELLO! We exit already here if the user server does not 1319 * support fsync OR if we should call fsync for a node which 1320 * has references neither in the kernel or the fs server. 1321 * Otherwise we continue to issue fsync() forward. 1322 */ 1323 if (!EXISTSOP(pmp, FSYNC)) 1324 return 0; 1325 1326 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1327 /* 1328 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1329 * only FAFs for those. Otherwise there's a danger of deadlock, 1330 * since the execution context here might be the user server 1331 * doing some operation on another fs, which in turn caused a 1332 * vnode to be reclaimed from the freelist for this fs. 1333 */ 1334 if (dofaf == 0) { 1335 mutex_enter(&vp->v_interlock); 1336 if (vp->v_iflag & VI_XLOCK) 1337 dofaf = 1; 1338 mutex_exit(&vp->v_interlock); 1339 } 1340 1341 PUFFS_MSG_ALLOC(vn, fsync); 1342 if (dofaf) 1343 puffs_msg_setfaf(park_fsync); 1344 1345 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1346 fsync_msg->pvnr_flags = ap->a_flags; 1347 fsync_msg->pvnr_offlo = ap->a_offlo; 1348 fsync_msg->pvnr_offhi = ap->a_offhi; 1349 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1350 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1351 1352 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1353 PUFFS_MSG_RELEASE(fsync); 1354 1355 error = checkerr(pmp, error, __func__); 1356 1357 return error; 1358 } 1359 1360 int 1361 puffs_vnop_seek(void *v) 1362 { 1363 struct vop_seek_args /* { 1364 const struct vnodeop_desc *a_desc; 1365 struct vnode *a_vp; 1366 off_t a_oldoff; 1367 off_t a_newoff; 1368 kauth_cred_t a_cred; 1369 } */ *ap = v; 1370 PUFFS_MSG_VARS(vn, seek); 1371 struct vnode *vp = ap->a_vp; 1372 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1373 int error; 1374 1375 PUFFS_MSG_ALLOC(vn, seek); 1376 seek_msg->pvnr_oldoff = ap->a_oldoff; 1377 seek_msg->pvnr_newoff = ap->a_newoff; 1378 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1379 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1380 PUFFS_VN_SEEK, VPTOPNC(vp)); 1381 1382 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1383 PUFFS_MSG_RELEASE(seek); 1384 return checkerr(pmp, error, __func__); 1385 } 1386 1387 static int 1388 callremove(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1389 struct componentname *cnp) 1390 { 1391 PUFFS_MSG_VARS(vn, remove); 1392 int error; 1393 1394 PUFFS_MSG_ALLOC(vn, remove); 1395 remove_msg->pvnr_cookie_targ = ck; 1396 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1397 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1398 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dck); 1399 1400 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1401 PUFFS_MSG_RELEASE(remove); 1402 1403 return checkerr(pmp, error, __func__); 1404 } 1405 1406 /* 1407 * XXX: can't use callremove now because can't catch setbacks with 1408 * it due to lack of a pnode argument. 1409 */ 1410 int 1411 puffs_vnop_remove(void *v) 1412 { 1413 struct vop_remove_args /* { 1414 const struct vnodeop_desc *a_desc; 1415 struct vnode *a_dvp; 1416 struct vnode *a_vp; 1417 struct componentname *a_cnp; 1418 } */ *ap = v; 1419 PUFFS_MSG_VARS(vn, remove); 1420 struct vnode *dvp = ap->a_dvp; 1421 struct vnode *vp = ap->a_vp; 1422 struct puffs_node *dpn = VPTOPP(dvp); 1423 struct puffs_node *pn = VPTOPP(vp); 1424 struct componentname *cnp = ap->a_cnp; 1425 struct mount *mp = dvp->v_mount; 1426 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1427 int error; 1428 1429 PUFFS_MSG_ALLOC(vn, remove); 1430 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1431 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1432 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1433 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1434 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1435 1436 puffs_msg_enqueue(pmp, park_remove); 1437 REFPN_AND_UNLOCKVP(dvp, dpn); 1438 if (dvp == vp) 1439 REFPN(pn); 1440 else 1441 REFPN_AND_UNLOCKVP(vp, pn); 1442 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1443 1444 PUFFS_MSG_RELEASE(remove); 1445 1446 RELEPN_AND_VP(dvp, dpn); 1447 RELEPN_AND_VP(vp, pn); 1448 1449 error = checkerr(pmp, error, __func__); 1450 if (error || (cnp->cn_flags & SAVESTART) == 0) 1451 PNBUF_PUT(cnp->cn_pnbuf); 1452 return error; 1453 } 1454 1455 int 1456 puffs_vnop_mkdir(void *v) 1457 { 1458 struct vop_mkdir_args /* { 1459 const struct vnodeop_desc *a_desc; 1460 struct vnode *a_dvp; 1461 struct vnode **a_vpp; 1462 struct componentname *a_cnp; 1463 struct vattr *a_vap; 1464 } */ *ap = v; 1465 PUFFS_MSG_VARS(vn, mkdir); 1466 struct vnode *dvp = ap->a_dvp; 1467 struct puffs_node *dpn = VPTOPP(dvp); 1468 struct componentname *cnp = ap->a_cnp; 1469 struct mount *mp = dvp->v_mount; 1470 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1471 int error; 1472 1473 PUFFS_MSG_ALLOC(vn, mkdir); 1474 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1475 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1476 mkdir_msg->pvnr_va = *ap->a_vap; 1477 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1478 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1479 1480 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mkdir, dvp->v_data, NULL, error); 1481 1482 error = checkerr(pmp, error, __func__); 1483 if (error) 1484 goto out; 1485 1486 error = puffs_newnode(mp, dvp, ap->a_vpp, 1487 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1488 if (error) 1489 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1490 mkdir_msg->pvnr_newnode, cnp); 1491 1492 out: 1493 vput(dvp); 1494 PUFFS_MSG_RELEASE(mkdir); 1495 if (error || (cnp->cn_flags & SAVESTART) == 0) 1496 PNBUF_PUT(cnp->cn_pnbuf); 1497 return error; 1498 } 1499 1500 static int 1501 callrmdir(struct puffs_mount *pmp, puffs_cookie_t dck, puffs_cookie_t ck, 1502 struct componentname *cnp) 1503 { 1504 PUFFS_MSG_VARS(vn, rmdir); 1505 int error; 1506 1507 PUFFS_MSG_ALLOC(vn, rmdir); 1508 rmdir_msg->pvnr_cookie_targ = ck; 1509 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1510 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1511 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dck); 1512 1513 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1514 PUFFS_MSG_RELEASE(rmdir); 1515 1516 return checkerr(pmp, error, __func__); 1517 } 1518 1519 int 1520 puffs_vnop_rmdir(void *v) 1521 { 1522 struct vop_rmdir_args /* { 1523 const struct vnodeop_desc *a_desc; 1524 struct vnode *a_dvp; 1525 struct vnode *a_vp; 1526 struct componentname *a_cnp; 1527 } */ *ap = v; 1528 PUFFS_MSG_VARS(vn, rmdir); 1529 struct vnode *dvp = ap->a_dvp; 1530 struct vnode *vp = ap->a_vp; 1531 struct puffs_node *dpn = VPTOPP(dvp); 1532 struct puffs_node *pn = VPTOPP(vp); 1533 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1534 struct componentname *cnp = ap->a_cnp; 1535 int error; 1536 1537 PUFFS_MSG_ALLOC(vn, rmdir); 1538 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1539 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1540 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1541 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1542 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1543 1544 puffs_msg_enqueue(pmp, park_rmdir); 1545 REFPN_AND_UNLOCKVP(dvp, dpn); 1546 REFPN_AND_UNLOCKVP(vp, pn); 1547 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1548 1549 PUFFS_MSG_RELEASE(rmdir); 1550 1551 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1552 RELEPN_AND_VP(dvp, dpn); 1553 RELEPN_AND_VP(vp, pn); 1554 1555 if (error || (cnp->cn_flags & SAVESTART) == 0) 1556 PNBUF_PUT(cnp->cn_pnbuf); 1557 1558 return error; 1559 } 1560 1561 int 1562 puffs_vnop_link(void *v) 1563 { 1564 struct vop_link_args /* { 1565 const struct vnodeop_desc *a_desc; 1566 struct vnode *a_dvp; 1567 struct vnode *a_vp; 1568 struct componentname *a_cnp; 1569 } */ *ap = v; 1570 PUFFS_MSG_VARS(vn, link); 1571 struct vnode *dvp = ap->a_dvp; 1572 struct vnode *vp = ap->a_vp; 1573 struct puffs_node *dpn = VPTOPP(dvp); 1574 struct puffs_node *pn = VPTOPP(vp); 1575 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1576 struct componentname *cnp = ap->a_cnp; 1577 int error; 1578 1579 PUFFS_MSG_ALLOC(vn, link); 1580 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1581 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1582 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1583 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1584 PUFFS_VN_LINK, VPTOPNC(dvp)); 1585 1586 puffs_msg_enqueue(pmp, park_link); 1587 REFPN_AND_UNLOCKVP(dvp, dpn); 1588 REFPN(pn); 1589 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1590 1591 PUFFS_MSG_RELEASE(link); 1592 1593 error = checkerr(pmp, error, __func__); 1594 1595 /* 1596 * XXX: stay in touch with the cache. I don't like this, but 1597 * don't have a better solution either. See also puffs_rename(). 1598 */ 1599 if (error == 0) 1600 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1601 1602 PNBUF_PUT(cnp->cn_pnbuf); 1603 RELEPN_AND_VP(dvp, dpn); 1604 puffs_releasenode(pn); 1605 1606 return error; 1607 } 1608 1609 int 1610 puffs_vnop_symlink(void *v) 1611 { 1612 struct vop_symlink_args /* { 1613 const struct vnodeop_desc *a_desc; 1614 struct vnode *a_dvp; 1615 struct vnode **a_vpp; 1616 struct componentname *a_cnp; 1617 struct vattr *a_vap; 1618 char *a_target; 1619 } */ *ap = v; 1620 PUFFS_MSG_VARS(vn, symlink); 1621 struct vnode *dvp = ap->a_dvp; 1622 struct puffs_node *dpn = VPTOPP(dvp); 1623 struct mount *mp = dvp->v_mount; 1624 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1625 struct componentname *cnp = ap->a_cnp; 1626 int error; 1627 1628 *ap->a_vpp = NULL; 1629 1630 PUFFS_MSG_ALLOC(vn, symlink); 1631 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1632 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1633 symlink_msg->pvnr_va = *ap->a_vap; 1634 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1635 sizeof(symlink_msg->pvnr_link)); 1636 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1637 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1638 1639 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_symlink, dvp->v_data, NULL, error); 1640 1641 error = checkerr(pmp, error, __func__); 1642 if (error) 1643 goto out; 1644 1645 error = puffs_newnode(mp, dvp, ap->a_vpp, 1646 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 1647 if (error) 1648 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 1649 symlink_msg->pvnr_newnode, cnp); 1650 1651 out: 1652 vput(dvp); 1653 PUFFS_MSG_RELEASE(symlink); 1654 if (error || (cnp->cn_flags & SAVESTART) == 0) 1655 PNBUF_PUT(cnp->cn_pnbuf); 1656 1657 return error; 1658 } 1659 1660 int 1661 puffs_vnop_readlink(void *v) 1662 { 1663 struct vop_readlink_args /* { 1664 const struct vnodeop_desc *a_desc; 1665 struct vnode *a_vp; 1666 struct uio *a_uio; 1667 kauth_cred_t a_cred; 1668 } */ *ap = v; 1669 PUFFS_MSG_VARS(vn, readlink); 1670 struct vnode *vp = ap->a_vp; 1671 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1672 size_t linklen; 1673 int error; 1674 1675 PUFFS_MSG_ALLOC(vn, readlink); 1676 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1677 linklen = sizeof(readlink_msg->pvnr_link); 1678 readlink_msg->pvnr_linklen = linklen; 1679 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1680 PUFFS_VN_READLINK, VPTOPNC(vp)); 1681 1682 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1683 error = checkerr(pmp, error, __func__); 1684 if (error) 1685 goto out; 1686 1687 /* bad bad user file server */ 1688 if (readlink_msg->pvnr_linklen > linklen) { 1689 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1690 "linklen too big", VPTOPNC(ap->a_vp)); 1691 error = EPROTO; 1692 goto out; 1693 } 1694 1695 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 1696 ap->a_uio); 1697 out: 1698 PUFFS_MSG_RELEASE(readlink); 1699 return error; 1700 } 1701 1702 int 1703 puffs_vnop_rename(void *v) 1704 { 1705 struct vop_rename_args /* { 1706 const struct vnodeop_desc *a_desc; 1707 struct vnode *a_fdvp; 1708 struct vnode *a_fvp; 1709 struct componentname *a_fcnp; 1710 struct vnode *a_tdvp; 1711 struct vnode *a_tvp; 1712 struct componentname *a_tcnp; 1713 } */ *ap = v; 1714 PUFFS_MSG_VARS(vn, rename); 1715 struct vnode *fdvp = ap->a_fdvp; 1716 struct puffs_node *fpn = ap->a_fvp->v_data; 1717 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 1718 int error; 1719 1720 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) 1721 ERROUT(EXDEV); 1722 1723 PUFFS_MSG_ALLOC(vn, rename); 1724 rename_msg->pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1725 rename_msg->pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1726 if (ap->a_tvp) 1727 rename_msg->pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1728 else 1729 rename_msg->pvnr_cookie_targ = NULL; 1730 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 1731 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1732 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 1733 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1734 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 1735 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 1736 1737 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 1738 error = checkerr(pmp, error, __func__); 1739 1740 /* 1741 * XXX: stay in touch with the cache. I don't like this, but 1742 * don't have a better solution either. See also puffs_link(). 1743 */ 1744 if (error == 0) 1745 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 1746 1747 out: 1748 PUFFS_MSG_RELEASE(rename); 1749 if (ap->a_tvp != NULL) 1750 vput(ap->a_tvp); 1751 if (ap->a_tdvp == ap->a_tvp) 1752 vrele(ap->a_tdvp); 1753 else 1754 vput(ap->a_tdvp); 1755 1756 vrele(ap->a_fdvp); 1757 vrele(ap->a_fvp); 1758 1759 return error; 1760 } 1761 1762 #define RWARGS(cont, iofl, move, offset, creds) \ 1763 (cont)->pvnr_ioflag = (iofl); \ 1764 (cont)->pvnr_resid = (move); \ 1765 (cont)->pvnr_offset = (offset); \ 1766 puffs_credcvt(&(cont)->pvnr_cred, creds) 1767 1768 int 1769 puffs_vnop_read(void *v) 1770 { 1771 struct vop_read_args /* { 1772 const struct vnodeop_desc *a_desc; 1773 struct vnode *a_vp; 1774 struct uio *a_uio; 1775 int a_ioflag; 1776 kauth_cred_t a_cred; 1777 } */ *ap = v; 1778 PUFFS_MSG_VARS(vn, read); 1779 struct vnode *vp = ap->a_vp; 1780 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1781 struct uio *uio = ap->a_uio; 1782 size_t tomove, argsize; 1783 vsize_t bytelen; 1784 int error; 1785 1786 read_msg = NULL; 1787 error = 0; 1788 1789 /* std sanity */ 1790 if (uio->uio_resid == 0) 1791 return 0; 1792 if (uio->uio_offset < 0) 1793 return EINVAL; 1794 1795 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1796 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1797 1798 while (uio->uio_resid > 0) { 1799 bytelen = MIN(uio->uio_resid, 1800 vp->v_size - uio->uio_offset); 1801 if (bytelen == 0) 1802 break; 1803 1804 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, advice, 1805 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 1806 if (error) 1807 break; 1808 } 1809 1810 if ((vp->v_mount->mnt_flag & MNT_NOATIME) == 0) 1811 puffs_updatenode(VPTOPP(vp), PUFFS_UPDATEATIME, 0); 1812 } else { 1813 /* 1814 * in case it's not a regular file or we're operating 1815 * uncached, do read in the old-fashioned style, 1816 * i.e. explicit read operations 1817 */ 1818 1819 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1820 argsize = sizeof(struct puffs_vnmsg_read); 1821 puffs_msgmem_alloc(argsize + tomove, &park_read, 1822 (void *)&read_msg, 1); 1823 1824 error = 0; 1825 while (uio->uio_resid > 0) { 1826 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1827 memset(read_msg, 0, argsize); /* XXX: touser KASSERT */ 1828 RWARGS(read_msg, ap->a_ioflag, tomove, 1829 uio->uio_offset, ap->a_cred); 1830 puffs_msg_setinfo(park_read, PUFFSOP_VN, 1831 PUFFS_VN_READ, VPTOPNC(vp)); 1832 puffs_msg_setdelta(park_read, tomove); 1833 1834 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_read, vp->v_data, 1835 NULL, error); 1836 error = checkerr(pmp, error, __func__); 1837 if (error) 1838 break; 1839 1840 if (read_msg->pvnr_resid > tomove) { 1841 puffs_senderr(pmp, PUFFS_ERR_READ, 1842 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1843 error = EPROTO; 1844 break; 1845 } 1846 1847 error = uiomove(read_msg->pvnr_data, 1848 tomove - read_msg->pvnr_resid, uio); 1849 1850 /* 1851 * in case the file is out of juice, resid from 1852 * userspace is != 0. and the error-case is 1853 * quite obvious 1854 */ 1855 if (error || read_msg->pvnr_resid) 1856 break; 1857 } 1858 1859 puffs_msgmem_release(park_read); 1860 } 1861 1862 return error; 1863 } 1864 1865 /* 1866 * XXX: in case of a failure, this leaves uio in a bad state. 1867 * We could theoretically copy the uio and iovecs and "replay" 1868 * them the right amount after the userspace trip, but don't 1869 * bother for now. 1870 */ 1871 int 1872 puffs_vnop_write(void *v) 1873 { 1874 struct vop_write_args /* { 1875 const struct vnodeop_desc *a_desc; 1876 struct vnode *a_vp; 1877 struct uio *a_uio; 1878 int a_ioflag; 1879 kauth_cred_t a_cred; 1880 } */ *ap = v; 1881 PUFFS_MSG_VARS(vn, write); 1882 struct vnode *vp = ap->a_vp; 1883 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1884 struct uio *uio = ap->a_uio; 1885 size_t tomove, argsize; 1886 off_t oldoff, newoff, origoff; 1887 vsize_t bytelen; 1888 int error, uflags; 1889 int ubcflags; 1890 1891 error = uflags = 0; 1892 write_msg = NULL; 1893 1894 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1895 ubcflags = UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp); 1896 1897 /* 1898 * userspace *should* be allowed to control this, 1899 * but with UBC it's a bit unclear how to handle it 1900 */ 1901 if (ap->a_ioflag & IO_APPEND) 1902 uio->uio_offset = vp->v_size; 1903 1904 origoff = uio->uio_offset; 1905 while (uio->uio_resid > 0) { 1906 uflags |= PUFFS_UPDATECTIME; 1907 uflags |= PUFFS_UPDATEMTIME; 1908 oldoff = uio->uio_offset; 1909 bytelen = uio->uio_resid; 1910 1911 newoff = oldoff + bytelen; 1912 if (vp->v_size < newoff) { 1913 uvm_vnp_setwritesize(vp, newoff); 1914 } 1915 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1916 UVM_ADV_RANDOM, ubcflags); 1917 1918 /* 1919 * In case of a ubc_uiomove() error, 1920 * opt to not extend the file at all and 1921 * return an error. Otherwise, if we attempt 1922 * to clear the memory we couldn't fault to, 1923 * we might generate a kernel page fault. 1924 */ 1925 if (vp->v_size < newoff) { 1926 if (error == 0) { 1927 uflags |= PUFFS_UPDATESIZE; 1928 uvm_vnp_setsize(vp, newoff); 1929 } else { 1930 uvm_vnp_setwritesize(vp, vp->v_size); 1931 } 1932 } 1933 if (error) 1934 break; 1935 1936 /* 1937 * If we're writing large files, flush to file server 1938 * every 64k. Otherwise we can very easily exhaust 1939 * kernel and user memory, as the file server cannot 1940 * really keep up with our writing speed. 1941 * 1942 * Note: this does *NOT* honor MNT_ASYNC, because 1943 * that gives userland too much say in the kernel. 1944 */ 1945 if (oldoff >> 16 != uio->uio_offset >> 16) { 1946 mutex_enter(&vp->v_interlock); 1947 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1948 uio->uio_offset & ~0xffff, 1949 PGO_CLEANIT | PGO_SYNCIO); 1950 if (error) 1951 break; 1952 } 1953 } 1954 1955 /* synchronous I/O? */ 1956 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1957 mutex_enter(&vp->v_interlock); 1958 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1959 round_page(uio->uio_offset), 1960 PGO_CLEANIT | PGO_SYNCIO); 1961 1962 /* write through page cache? */ 1963 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1964 mutex_enter(&vp->v_interlock); 1965 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1966 round_page(uio->uio_offset), PGO_CLEANIT); 1967 } 1968 1969 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 1970 } else { 1971 /* tomove is non-increasing */ 1972 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1973 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 1974 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 1975 1976 while (uio->uio_resid > 0) { 1977 /* move data to buffer */ 1978 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1979 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 1980 RWARGS(write_msg, ap->a_ioflag, tomove, 1981 uio->uio_offset, ap->a_cred); 1982 error = uiomove(write_msg->pvnr_data, tomove, uio); 1983 if (error) 1984 break; 1985 1986 /* move buffer to userspace */ 1987 puffs_msg_setinfo(park_write, PUFFSOP_VN, 1988 PUFFS_VN_WRITE, VPTOPNC(vp)); 1989 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 1990 NULL, error); 1991 error = checkerr(pmp, error, __func__); 1992 if (error) 1993 break; 1994 1995 if (write_msg->pvnr_resid > tomove) { 1996 puffs_senderr(pmp, PUFFS_ERR_WRITE, 1997 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1998 error = EPROTO; 1999 break; 2000 } 2001 2002 /* adjust file size */ 2003 if (vp->v_size < uio->uio_offset) 2004 uvm_vnp_setsize(vp, uio->uio_offset); 2005 2006 /* didn't move everything? bad userspace. bail */ 2007 if (write_msg->pvnr_resid != 0) { 2008 error = EIO; 2009 break; 2010 } 2011 } 2012 puffs_msgmem_release(park_write); 2013 } 2014 2015 return error; 2016 } 2017 2018 int 2019 puffs_vnop_print(void *v) 2020 { 2021 struct vop_print_args /* { 2022 struct vnode *a_vp; 2023 } */ *ap = v; 2024 PUFFS_MSG_VARS(vn, print); 2025 struct vnode *vp = ap->a_vp; 2026 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2027 struct puffs_node *pn = vp->v_data; 2028 int error; 2029 2030 /* kernel portion */ 2031 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2032 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 2033 if (vp->v_type == VFIFO) 2034 fifo_printinfo(vp); 2035 2036 /* userspace portion */ 2037 if (EXISTSOP(pmp, PRINT)) { 2038 PUFFS_MSG_ALLOC(vn, print); 2039 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2040 PUFFS_VN_PRINT, VPTOPNC(vp)); 2041 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2042 NULL, error); 2043 PUFFS_MSG_RELEASE(print); 2044 } 2045 2046 return 0; 2047 } 2048 2049 int 2050 puffs_vnop_pathconf(void *v) 2051 { 2052 struct vop_pathconf_args /* { 2053 const struct vnodeop_desc *a_desc; 2054 struct vnode *a_vp; 2055 int a_name; 2056 register_t *a_retval; 2057 } */ *ap = v; 2058 PUFFS_MSG_VARS(vn, pathconf); 2059 struct vnode *vp = ap->a_vp; 2060 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2061 int error; 2062 2063 PUFFS_MSG_ALLOC(vn, pathconf); 2064 pathconf_msg->pvnr_name = ap->a_name; 2065 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2066 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2067 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2068 error = checkerr(pmp, error, __func__); 2069 if (!error) 2070 *ap->a_retval = pathconf_msg->pvnr_retval; 2071 PUFFS_MSG_RELEASE(pathconf); 2072 2073 return error; 2074 } 2075 2076 int 2077 puffs_vnop_advlock(void *v) 2078 { 2079 struct vop_advlock_args /* { 2080 const struct vnodeop_desc *a_desc; 2081 struct vnode *a_vp; 2082 void *a_id; 2083 int a_op; 2084 struct flock *a_fl; 2085 int a_flags; 2086 } */ *ap = v; 2087 PUFFS_MSG_VARS(vn, advlock); 2088 struct vnode *vp = ap->a_vp; 2089 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2090 int error; 2091 2092 PUFFS_MSG_ALLOC(vn, advlock); 2093 error = copyin(ap->a_fl, &advlock_msg->pvnr_fl, sizeof(struct flock)); 2094 if (error) 2095 goto out; 2096 advlock_msg->pvnr_id = ap->a_id; 2097 advlock_msg->pvnr_op = ap->a_op; 2098 advlock_msg->pvnr_flags = ap->a_flags; 2099 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2100 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2101 2102 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2103 error = checkerr(pmp, error, __func__); 2104 2105 out: 2106 PUFFS_MSG_RELEASE(advlock); 2107 return error; 2108 } 2109 2110 int 2111 puffs_vnop_abortop(void *v) 2112 { 2113 struct vop_abortop_args /* { 2114 struct vnode *a_dvp; 2115 struct componentname *a_cnp; 2116 }; */ *ap = v; 2117 PUFFS_MSG_VARS(vn, abortop); 2118 struct vnode *dvp = ap->a_dvp; 2119 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 2120 struct componentname *cnp = ap->a_cnp; 2121 int error; 2122 2123 if (EXISTSOP(pmp, ABORTOP)) { 2124 PUFFS_MSG_ALLOC(vn, abortop); 2125 puffs_makecn(&abortop_msg->pvnr_cn, &abortop_msg->pvnr_cn_cred, 2126 cnp, PUFFS_USE_FULLPNBUF(pmp)); 2127 puffs_msg_setinfo(park_abortop, PUFFSOP_VN, 2128 PUFFS_VN_ABORTOP, VPTOPNC(dvp)); 2129 2130 PUFFS_MSG_ENQUEUEWAIT(pmp, park_abortop, error); 2131 PUFFS_MSG_RELEASE(abortop); 2132 } 2133 2134 return genfs_abortop(v); 2135 } 2136 2137 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2138 2139 /* 2140 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2141 */ 2142 int 2143 puffs_vnop_strategy(void *v) 2144 { 2145 struct vop_strategy_args /* { 2146 const struct vnodeop_desc *a_desc; 2147 struct vnode *a_vp; 2148 struct buf *a_bp; 2149 } */ *ap = v; 2150 PUFFS_MSG_VARS(vn, rw); 2151 struct vnode *vp = ap->a_vp; 2152 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2153 struct puffs_node *pn; 2154 struct buf *bp; 2155 size_t argsize; 2156 size_t tomove, moved; 2157 int error, dofaf, dobiodone; 2158 2159 pmp = MPTOPUFFSMP(vp->v_mount); 2160 bp = ap->a_bp; 2161 error = 0; 2162 dofaf = 0; 2163 pn = VPTOPP(vp); 2164 park_rw = NULL; /* explicit */ 2165 dobiodone = 1; 2166 2167 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2168 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2169 ERROUT(EOPNOTSUPP); 2170 2171 #ifdef DIAGNOSTIC 2172 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2173 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2174 bp->b_bcount); 2175 #endif 2176 2177 /* 2178 * See explanation for the necessity of a FAF in puffs_fsync. 2179 * 2180 * Also, do FAF in case we're suspending. 2181 * See puffs_vfsops.c:pageflush() 2182 */ 2183 if (BUF_ISWRITE(bp)) { 2184 mutex_enter(&vp->v_interlock); 2185 if (vp->v_iflag & VI_XLOCK) 2186 dofaf = 1; 2187 if (pn->pn_stat & PNODE_SUSPEND) 2188 dofaf = 1; 2189 mutex_exit(&vp->v_interlock); 2190 } 2191 2192 #ifdef DIAGNOSTIC 2193 if (curlwp == uvm.pagedaemon_lwp) 2194 KASSERT(dofaf || BIOASYNC(bp)); 2195 #endif 2196 2197 /* allocate transport structure */ 2198 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2199 argsize = sizeof(struct puffs_vnmsg_rw); 2200 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2201 (void *)&rw_msg, dofaf ? 0 : 1); 2202 if (error) 2203 goto out; 2204 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2205 2206 /* 2x2 cases: read/write, faf/nofaf */ 2207 if (BUF_ISREAD(bp)) { 2208 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2209 PUFFS_VN_READ, VPTOPNC(vp)); 2210 puffs_msg_setdelta(park_rw, tomove); 2211 if (BIOASYNC(bp)) { 2212 puffs_msg_setcall(park_rw, 2213 puffs_parkdone_asyncbioread, bp); 2214 puffs_msg_enqueue(pmp, park_rw); 2215 dobiodone = 0; 2216 } else { 2217 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2218 NULL, error); 2219 error = checkerr(pmp, error, __func__); 2220 if (error) 2221 goto out; 2222 2223 if (rw_msg->pvnr_resid > tomove) { 2224 puffs_senderr(pmp, PUFFS_ERR_READ, 2225 E2BIG, "resid grew", VPTOPNC(vp)); 2226 ERROUT(EPROTO); 2227 } 2228 2229 moved = tomove - rw_msg->pvnr_resid; 2230 2231 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2232 bp->b_resid = bp->b_bcount - moved; 2233 } 2234 } else { 2235 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2236 PUFFS_VN_WRITE, VPTOPNC(vp)); 2237 /* 2238 * make pages read-only before we write them if we want 2239 * write caching info 2240 */ 2241 if (PUFFS_WCACHEINFO(pmp)) { 2242 struct uvm_object *uobj = &vp->v_uobj; 2243 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2244 struct vm_page *vmp; 2245 int i; 2246 2247 for (i = 0; i < npages; i++) { 2248 vmp= uvm_pageratop((vaddr_t)bp->b_data 2249 + (i << PAGE_SHIFT)); 2250 DPRINTF(("puffs_strategy: write-protecting " 2251 "vp %p page %p, offset %" PRId64"\n", 2252 vp, vmp, vmp->offset)); 2253 mutex_enter(&uobj->vmobjlock); 2254 vmp->flags |= PG_RDONLY; 2255 pmap_page_protect(vmp, VM_PROT_READ); 2256 mutex_exit(&uobj->vmobjlock); 2257 } 2258 } 2259 2260 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2261 if (dofaf) { 2262 puffs_msg_setfaf(park_rw); 2263 } else if (BIOASYNC(bp)) { 2264 puffs_msg_setcall(park_rw, 2265 puffs_parkdone_asyncbiowrite, bp); 2266 dobiodone = 0; 2267 } 2268 2269 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2270 2271 if (dobiodone == 0) 2272 goto out; 2273 2274 /* 2275 * XXXXXXXX: wrong, but kernel can't survive strategy 2276 * failure currently. Here, have one more X: X. 2277 */ 2278 if (error != ENOMEM) 2279 error = 0; 2280 2281 error = checkerr(pmp, error, __func__); 2282 if (error) 2283 goto out; 2284 2285 if (rw_msg->pvnr_resid > tomove) { 2286 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2287 E2BIG, "resid grew", VPTOPNC(vp)); 2288 ERROUT(EPROTO); 2289 } 2290 2291 /* 2292 * FAF moved everything. Frankly, we don't 2293 * really have a choice. 2294 */ 2295 if (dofaf && error == 0) 2296 moved = tomove; 2297 else 2298 moved = tomove - rw_msg->pvnr_resid; 2299 2300 bp->b_resid = bp->b_bcount - moved; 2301 if (bp->b_resid != 0) { 2302 ERROUT(EIO); 2303 } 2304 } 2305 2306 out: 2307 if (park_rw) 2308 puffs_msgmem_release(park_rw); 2309 2310 if (error) 2311 bp->b_error = error; 2312 2313 if (error || dobiodone) 2314 biodone(bp); 2315 2316 return error; 2317 } 2318 2319 int 2320 puffs_vnop_mmap(void *v) 2321 { 2322 struct vop_mmap_args /* { 2323 const struct vnodeop_desc *a_desc; 2324 struct vnode *a_vp; 2325 vm_prot_t a_prot; 2326 kauth_cred_t a_cred; 2327 } */ *ap = v; 2328 PUFFS_MSG_VARS(vn, mmap); 2329 struct vnode *vp = ap->a_vp; 2330 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2331 int error; 2332 2333 if (!PUFFS_USE_PAGECACHE(pmp)) 2334 return genfs_eopnotsupp(v); 2335 2336 if (EXISTSOP(pmp, MMAP)) { 2337 PUFFS_MSG_ALLOC(vn, mmap); 2338 mmap_msg->pvnr_prot = ap->a_prot; 2339 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2340 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2341 PUFFS_VN_MMAP, VPTOPNC(vp)); 2342 2343 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2344 error = checkerr(pmp, error, __func__); 2345 PUFFS_MSG_RELEASE(mmap); 2346 } else { 2347 error = genfs_mmap(v); 2348 } 2349 2350 return error; 2351 } 2352 2353 2354 /* 2355 * The rest don't get a free trip to userspace and back, they 2356 * have to stay within the kernel. 2357 */ 2358 2359 /* 2360 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2361 * well, maybe somehow, somewhere, some day .... 2362 */ 2363 int 2364 puffs_vnop_bmap(void *v) 2365 { 2366 struct vop_bmap_args /* { 2367 const struct vnodeop_desc *a_desc; 2368 struct vnode *a_vp; 2369 daddr_t a_bn; 2370 struct vnode **a_vpp; 2371 daddr_t *a_bnp; 2372 int *a_runp; 2373 } */ *ap = v; 2374 struct puffs_mount *pmp; 2375 2376 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2377 2378 if (ap->a_vpp) 2379 *ap->a_vpp = ap->a_vp; 2380 if (ap->a_bnp) 2381 *ap->a_bnp = ap->a_bn; 2382 if (ap->a_runp) 2383 *ap->a_runp 2384 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2385 2386 return 0; 2387 } 2388 2389 /* 2390 * Handle getpages faults in puffs. We let genfs_getpages() do most 2391 * of the dirty work, but we come in this route to do accounting tasks. 2392 * If the user server has specified functions for cache notifications 2393 * about reads and/or writes, we record which type of operation we got, 2394 * for which page range, and proceed to issue a FAF notification to the 2395 * server about it. 2396 */ 2397 int 2398 puffs_vnop_getpages(void *v) 2399 { 2400 struct vop_getpages_args /* { 2401 const struct vnodeop_desc *a_desc; 2402 struct vnode *a_vp; 2403 voff_t a_offset; 2404 struct vm_page **a_m; 2405 int *a_count; 2406 int a_centeridx; 2407 vm_prot_t a_access_type; 2408 int a_advice; 2409 int a_flags; 2410 } */ *ap = v; 2411 struct puffs_mount *pmp; 2412 struct puffs_node *pn; 2413 struct vnode *vp; 2414 struct vm_page **pgs; 2415 struct puffs_cacheinfo *pcinfo = NULL; 2416 struct puffs_cacherun *pcrun; 2417 void *parkmem = NULL; 2418 size_t runsizes; 2419 int i, npages, si, streakon; 2420 int error, locked, write; 2421 2422 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2423 npages = *ap->a_count; 2424 pgs = ap->a_m; 2425 vp = ap->a_vp; 2426 pn = vp->v_data; 2427 locked = (ap->a_flags & PGO_LOCKED) != 0; 2428 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2429 2430 /* ccg xnaht - gets Wuninitialized wrong */ 2431 pcrun = NULL; 2432 runsizes = 0; 2433 2434 /* 2435 * Check that we aren't trying to fault in pages which our file 2436 * server doesn't know about. This happens if we extend a file by 2437 * skipping some pages and later try to fault in pages which 2438 * are between pn_serversize and vp_size. This check optimizes 2439 * away the common case where a file is being extended. 2440 */ 2441 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2442 struct vattr va; 2443 2444 /* try again later when we can block */ 2445 if (locked) 2446 ERROUT(EBUSY); 2447 2448 mutex_exit(&vp->v_interlock); 2449 vattr_null(&va); 2450 va.va_size = vp->v_size; 2451 error = dosetattr(vp, &va, FSCRED, 0); 2452 if (error) 2453 ERROUT(error); 2454 mutex_enter(&vp->v_interlock); 2455 } 2456 2457 if (write && PUFFS_WCACHEINFO(pmp)) { 2458 #ifdef notnowjohn 2459 /* allocate worst-case memory */ 2460 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2461 pcinfo = kmem_zalloc(sizeof(struct puffs_cacheinfo) + runsize, 2462 locked ? KM_NOSLEEP : KM_SLEEP); 2463 2464 /* 2465 * can't block if we're locked and can't mess up caching 2466 * information for fs server. so come back later, please 2467 */ 2468 if (pcinfo == NULL) 2469 ERROUT(ENOMEM); 2470 2471 parkmem = puffs_park_alloc(locked == 0); 2472 if (parkmem == NULL) 2473 ERROUT(ENOMEM); 2474 2475 pcrun = pcinfo->pcache_runs; 2476 #else 2477 (void)parkmem; 2478 #endif 2479 } 2480 2481 error = genfs_getpages(v); 2482 if (error) 2483 goto out; 2484 2485 if (PUFFS_WCACHEINFO(pmp) == 0) 2486 goto out; 2487 2488 /* 2489 * Let's see whose fault it was and inform the user server of 2490 * possibly read/written pages. Map pages from read faults 2491 * strictly read-only, since otherwise we might miss info on 2492 * when the page is actually write-faulted to. 2493 */ 2494 if (!locked) 2495 mutex_enter(&vp->v_uobj.vmobjlock); 2496 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2497 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2498 if (streakon && write) { 2499 streakon = 0; 2500 pcrun[si].pcache_runend 2501 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2502 si++; 2503 } 2504 continue; 2505 } 2506 if (streakon == 0 && write) { 2507 streakon = 1; 2508 pcrun[si].pcache_runstart = pgs[i]->offset; 2509 } 2510 2511 if (!write) 2512 pgs[i]->flags |= PG_RDONLY; 2513 } 2514 /* was the last page part of our streak? */ 2515 if (streakon) { 2516 pcrun[si].pcache_runend 2517 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2518 si++; 2519 } 2520 if (!locked) 2521 mutex_exit(&vp->v_uobj.vmobjlock); 2522 2523 KASSERT(si <= (npages / 2) + 1); 2524 2525 #ifdef notnowjohn 2526 /* send results to userspace */ 2527 if (write) 2528 puffs_cacheop(pmp, parkmem, pcinfo, 2529 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2530 #endif 2531 2532 out: 2533 if (error) { 2534 if (pcinfo != NULL) 2535 kmem_free(pcinfo, 2536 sizeof(struct puffs_cacheinfo) + runsizes); 2537 #ifdef notnowjohn 2538 if (parkmem != NULL) 2539 puffs_park_release(parkmem, 1); 2540 #endif 2541 } 2542 2543 return error; 2544 } 2545 2546 int 2547 puffs_vnop_lock(void *v) 2548 { 2549 struct vop_lock_args /* { 2550 struct vnode *a_vp; 2551 int a_flags; 2552 } */ *ap = v; 2553 struct vnode *vp = ap->a_vp; 2554 struct mount *mp = vp->v_mount; 2555 int flags = ap->a_flags; 2556 2557 #if 0 2558 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2559 #endif 2560 2561 if (flags & LK_INTERLOCK) { 2562 mutex_exit(&vp->v_interlock); 2563 flags &= ~LK_INTERLOCK; 2564 } 2565 2566 /* 2567 * XXX: this avoids deadlocking when we're suspending. 2568 * e.g. some ops holding the vnode lock might be blocked for 2569 * the vfs transaction lock so we'd deadlock. 2570 * 2571 * Now once again this is skating on the thin ice of modern life, 2572 * since we are breaking the consistency guarantee provided 2573 * _to the user server_ by vnode locking. Hopefully this will 2574 * get fixed soon enough by getting rid of the dependency on 2575 * vnode locks alltogether. 2576 */ 2577 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2578 return 0; 2579 } 2580 2581 return vlockmgr(&vp->v_lock, flags); 2582 } 2583 2584 int 2585 puffs_vnop_unlock(void *v) 2586 { 2587 struct vop_unlock_args /* { 2588 struct vnode *a_vp; 2589 int a_flags; 2590 } */ *ap = v; 2591 struct vnode *vp = ap->a_vp; 2592 struct mount *mp = vp->v_mount; 2593 2594 #if 0 2595 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2596 #endif 2597 2598 /* XXX: see puffs_lock() */ 2599 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2600 return 0; 2601 } 2602 2603 return vlockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE); 2604 } 2605 2606 int 2607 puffs_vnop_islocked(void *v) 2608 { 2609 struct vop_islocked_args *ap = v; 2610 int rv; 2611 2612 rv = vlockstatus(&ap->a_vp->v_lock); 2613 return rv; 2614 } 2615 2616 2617 /* 2618 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2619 * FAF update information for the puffs node first. 2620 */ 2621 int 2622 puffs_vnop_spec_read(void *v) 2623 { 2624 struct vop_read_args /* { 2625 const struct vnodeop_desc *a_desc; 2626 struct vnode *a_vp; 2627 struct uio *a_uio; 2628 int a_ioflag; 2629 kauth_cred_t a_cred; 2630 } */ *ap = v; 2631 2632 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2633 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2634 } 2635 2636 int 2637 puffs_vnop_spec_write(void *v) 2638 { 2639 struct vop_write_args /* { 2640 const struct vnodeop_desc *a_desc; 2641 struct vnode *a_vp; 2642 struct uio *a_uio; 2643 int a_ioflag; 2644 kauth_cred_t a_cred; 2645 } */ *ap = v; 2646 2647 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2648 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2649 } 2650 2651 int 2652 puffs_vnop_fifo_read(void *v) 2653 { 2654 struct vop_read_args /* { 2655 const struct vnodeop_desc *a_desc; 2656 struct vnode *a_vp; 2657 struct uio *a_uio; 2658 int a_ioflag; 2659 kauth_cred_t a_cred; 2660 } */ *ap = v; 2661 2662 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2663 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2664 } 2665 2666 int 2667 puffs_vnop_fifo_write(void *v) 2668 { 2669 struct vop_write_args /* { 2670 const struct vnodeop_desc *a_desc; 2671 struct vnode *a_vp; 2672 struct uio *a_uio; 2673 int a_ioflag; 2674 kauth_cred_t a_cred; 2675 } */ *ap = v; 2676 2677 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2678 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2679 } 2680
Indexes created Tue Sep 30 06:09:59 GMT 2025