puffs_vnops.c revision 1.125
1 /* $NetBSD: puffs_vnops.c,v 1.125 2008/01/02 22:37:21 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 1.125 2008/01/02 22:37:21 pooka Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/fstrans.h> 37 #include <sys/malloc.h> 38 #include <sys/mount.h> 39 #include <sys/namei.h> 40 #include <sys/vnode.h> 41 #include <sys/proc.h> 42 43 #include <uvm/uvm.h> 44 45 #include <fs/puffs/puffs_msgif.h> 46 #include <fs/puffs/puffs_sys.h> 47 48 #include <miscfs/fifofs/fifo.h> 49 #include <miscfs/genfs/genfs.h> 50 #include <miscfs/specfs/specdev.h> 51 52 int puffs_vnop_lookup(void *); 53 int puffs_vnop_create(void *); 54 int puffs_vnop_access(void *); 55 int puffs_vnop_mknod(void *); 56 int puffs_vnop_open(void *); 57 int puffs_vnop_close(void *); 58 int puffs_vnop_getattr(void *); 59 int puffs_vnop_setattr(void *); 60 int puffs_vnop_reclaim(void *); 61 int puffs_vnop_readdir(void *); 62 int puffs_vnop_poll(void *); 63 int puffs_vnop_fsync(void *); 64 int puffs_vnop_seek(void *); 65 int puffs_vnop_remove(void *); 66 int puffs_vnop_mkdir(void *); 67 int puffs_vnop_rmdir(void *); 68 int puffs_vnop_link(void *); 69 int puffs_vnop_readlink(void *); 70 int puffs_vnop_symlink(void *); 71 int puffs_vnop_rename(void *); 72 int puffs_vnop_read(void *); 73 int puffs_vnop_write(void *); 74 int puffs_vnop_fcntl(void *); 75 int puffs_vnop_ioctl(void *); 76 int puffs_vnop_inactive(void *); 77 int puffs_vnop_print(void *); 78 int puffs_vnop_pathconf(void *); 79 int puffs_vnop_advlock(void *); 80 int puffs_vnop_strategy(void *); 81 int puffs_vnop_bmap(void *); 82 int puffs_vnop_mmap(void *); 83 int puffs_vnop_getpages(void *); 84 85 int puffs_vnop_spec_read(void *); 86 int puffs_vnop_spec_write(void *); 87 int puffs_vnop_fifo_read(void *); 88 int puffs_vnop_fifo_write(void *); 89 90 int puffs_vnop_checkop(void *); 91 92 93 #if 0 94 #define puffs_lock genfs_lock 95 #define puffs_unlock genfs_unlock 96 #define puffs_islocked genfs_islocked 97 #else 98 int puffs_vnop_lock(void *); 99 int puffs_vnop_unlock(void *); 100 int puffs_vnop_islocked(void *); 101 #endif 102 103 int (**puffs_vnodeop_p)(void *); 104 const struct vnodeopv_entry_desc puffs_vnodeop_entries[] = { 105 { &vop_default_desc, vn_default_error }, 106 { &vop_lookup_desc, puffs_vnop_lookup }, /* REAL lookup */ 107 { &vop_create_desc, puffs_vnop_checkop }, /* create */ 108 { &vop_mknod_desc, puffs_vnop_checkop }, /* mknod */ 109 { &vop_open_desc, puffs_vnop_open }, /* REAL open */ 110 { &vop_close_desc, puffs_vnop_checkop }, /* close */ 111 { &vop_access_desc, puffs_vnop_access }, /* REAL access */ 112 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 113 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 114 { &vop_read_desc, puffs_vnop_checkop }, /* read */ 115 { &vop_write_desc, puffs_vnop_checkop }, /* write */ 116 { &vop_fsync_desc, puffs_vnop_fsync }, /* REAL fsync */ 117 { &vop_seek_desc, puffs_vnop_checkop }, /* seek */ 118 { &vop_remove_desc, puffs_vnop_checkop }, /* remove */ 119 { &vop_link_desc, puffs_vnop_checkop }, /* link */ 120 { &vop_rename_desc, puffs_vnop_checkop }, /* rename */ 121 { &vop_mkdir_desc, puffs_vnop_checkop }, /* mkdir */ 122 { &vop_rmdir_desc, puffs_vnop_checkop }, /* rmdir */ 123 { &vop_symlink_desc, puffs_vnop_checkop }, /* symlink */ 124 { &vop_readdir_desc, puffs_vnop_checkop }, /* readdir */ 125 { &vop_readlink_desc, puffs_vnop_checkop }, /* readlink */ 126 { &vop_getpages_desc, puffs_vnop_checkop }, /* getpages */ 127 { &vop_putpages_desc, genfs_putpages }, /* REAL putpages */ 128 { &vop_pathconf_desc, puffs_vnop_checkop }, /* pathconf */ 129 { &vop_advlock_desc, puffs_vnop_checkop }, /* advlock */ 130 { &vop_strategy_desc, puffs_vnop_strategy }, /* REAL strategy */ 131 { &vop_revoke_desc, genfs_revoke }, /* REAL revoke */ 132 { &vop_abortop_desc, genfs_abortop }, /* REAL abortop */ 133 { &vop_inactive_desc, puffs_vnop_inactive }, /* REAL inactive */ 134 { &vop_reclaim_desc, puffs_vnop_reclaim }, /* REAL reclaim */ 135 { &vop_lock_desc, puffs_vnop_lock }, /* REAL lock */ 136 { &vop_unlock_desc, puffs_vnop_unlock }, /* REAL unlock */ 137 { &vop_bmap_desc, puffs_vnop_bmap }, /* REAL bmap */ 138 { &vop_print_desc, puffs_vnop_print }, /* REAL print */ 139 { &vop_islocked_desc, puffs_vnop_islocked }, /* REAL islocked */ 140 { &vop_bwrite_desc, genfs_nullop }, /* REAL bwrite */ 141 { &vop_mmap_desc, puffs_vnop_mmap }, /* REAL mmap */ 142 { &vop_poll_desc, puffs_vnop_poll }, /* REAL poll */ 143 144 { &vop_kqfilter_desc, genfs_eopnotsupp }, /* kqfilter XXX */ 145 { NULL, NULL } 146 }; 147 const struct vnodeopv_desc puffs_vnodeop_opv_desc = 148 { &puffs_vnodeop_p, puffs_vnodeop_entries }; 149 150 151 int (**puffs_specop_p)(void *); 152 const struct vnodeopv_entry_desc puffs_specop_entries[] = { 153 { &vop_default_desc, vn_default_error }, 154 { &vop_lookup_desc, spec_lookup }, /* lookup, ENOTDIR */ 155 { &vop_create_desc, spec_create }, /* genfs_badop */ 156 { &vop_mknod_desc, spec_mknod }, /* genfs_badop */ 157 { &vop_open_desc, spec_open }, /* spec_open */ 158 { &vop_close_desc, spec_close }, /* spec_close */ 159 { &vop_access_desc, puffs_vnop_checkop }, /* access */ 160 { &vop_getattr_desc, puffs_vnop_checkop }, /* getattr */ 161 { &vop_setattr_desc, puffs_vnop_checkop }, /* setattr */ 162 { &vop_read_desc, puffs_vnop_spec_read }, /* update, read */ 163 { &vop_write_desc, puffs_vnop_spec_write }, /* update, write */ 164 { &vop_lease_desc, spec_lease_check }, /* genfs_nullop */ 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_lease_desc, fifo_lease_check }, /* genfs_nullop */ 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 *, void *, void *, 401 struct componentname *); 402 static int callrmdir(struct puffs_mount *, void *, void *, 403 struct componentname *); 404 static void callinactive(struct puffs_mount *, void *, int); 405 static void callreclaim(struct puffs_mount *, void *); 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 void *dcookie, void *cookie, 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, dcookie, cookie, cnp); 426 break; 427 case PUFFS_ABORT_MKDIR: 428 callrmdir(pmp, dcookie, cookie, cnp); 429 break; 430 } 431 432 callinactive(pmp, cookie, 0); 433 callreclaim(pmp, cookie); 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 out: 586 if (cnp->cn_flags & ISDOTDOT) 587 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 588 589 DPRINTF(("puffs_lookup: returning %d %p\n", error, *ap->a_vpp)); 590 PUFFS_MSG_RELEASE(lookup); 591 return error; 592 } 593 594 #define REFPN_AND_UNLOCKVP(a, b) \ 595 do { \ 596 mutex_enter(&b->pn_mtx); \ 597 puffs_referencenode(b); \ 598 mutex_exit(&b->pn_mtx); \ 599 VOP_UNLOCK(a, 0); \ 600 } while (/*CONSTCOND*/0) 601 602 #define REFPN(b) \ 603 do { \ 604 mutex_enter(&b->pn_mtx); \ 605 puffs_referencenode(b); \ 606 mutex_exit(&b->pn_mtx); \ 607 } while (/*CONSTCOND*/0) 608 609 #define RELEPN_AND_VP(a, b) \ 610 do { \ 611 puffs_releasenode(b); \ 612 vrele(a); \ 613 } while (/*CONSTCOND*/0) 614 615 int 616 puffs_vnop_create(void *v) 617 { 618 struct vop_create_args /* { 619 const struct vnodeop_desc *a_desc; 620 struct vnode *a_dvp; 621 struct vnode **a_vpp; 622 struct componentname *a_cnp; 623 struct vattr *a_vap; 624 } */ *ap = v; 625 PUFFS_MSG_VARS(vn, create); 626 struct vnode *dvp = ap->a_dvp; 627 struct puffs_node *dpn = VPTOPP(dvp); 628 struct componentname *cnp = ap->a_cnp; 629 struct mount *mp = dvp->v_mount; 630 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 631 int error; 632 633 DPRINTF(("puffs_create: dvp %p, cnp: %s\n", 634 dvp, ap->a_cnp->cn_nameptr)); 635 636 PUFFS_MSG_ALLOC(vn, create); 637 puffs_makecn(&create_msg->pvnr_cn, &create_msg->pvnr_cn_cred, 638 cnp, PUFFS_USE_FULLPNBUF(pmp)); 639 create_msg->pvnr_va = *ap->a_vap; 640 puffs_msg_setinfo(park_create, PUFFSOP_VN, 641 PUFFS_VN_CREATE, VPTOPNC(dvp)); 642 643 /* 644 * Do the dance: 645 * + insert into queue ("interlock") 646 * + unlock vnode 647 * + wait for response 648 */ 649 puffs_msg_enqueue(pmp, park_create); 650 REFPN_AND_UNLOCKVP(dvp, dpn); 651 error = puffs_msg_wait2(pmp, park_create, dpn, NULL); 652 653 error = checkerr(pmp, error, __func__); 654 if (error) 655 goto out; 656 657 error = puffs_newnode(mp, dvp, ap->a_vpp, 658 create_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 0); 659 if (error) 660 puffs_abortbutton(pmp, PUFFS_ABORT_CREATE, dpn->pn_cookie, 661 create_msg->pvnr_newnode, cnp); 662 663 out: 664 if (error || (cnp->cn_flags & SAVESTART) == 0) 665 PNBUF_PUT(cnp->cn_pnbuf); 666 667 RELEPN_AND_VP(dvp, dpn); 668 DPRINTF(("puffs_create: return %d\n", error)); 669 PUFFS_MSG_RELEASE(create); 670 return error; 671 } 672 673 int 674 puffs_vnop_mknod(void *v) 675 { 676 struct vop_mknod_args /* { 677 const struct vnodeop_desc *a_desc; 678 struct vnode *a_dvp; 679 struct vnode **a_vpp; 680 struct componentname *a_cnp; 681 struct vattr *a_vap; 682 } */ *ap = v; 683 PUFFS_MSG_VARS(vn, mknod); 684 struct vnode *dvp = ap->a_dvp; 685 struct puffs_node *dpn = VPTOPP(dvp); 686 struct componentname *cnp = ap->a_cnp; 687 struct mount *mp = dvp->v_mount; 688 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 689 int error; 690 691 PUFFS_MSG_ALLOC(vn, mknod); 692 puffs_makecn(&mknod_msg->pvnr_cn, &mknod_msg->pvnr_cn_cred, 693 cnp, PUFFS_USE_FULLPNBUF(pmp)); 694 mknod_msg->pvnr_va = *ap->a_vap; 695 puffs_msg_setinfo(park_mknod, PUFFSOP_VN, 696 PUFFS_VN_MKNOD, VPTOPNC(dvp)); 697 698 puffs_msg_enqueue(pmp, park_mknod); 699 REFPN_AND_UNLOCKVP(dvp, dpn); 700 error = puffs_msg_wait2(pmp, park_mknod, dpn, NULL); 701 702 error = checkerr(pmp, error, __func__); 703 if (error) 704 goto out; 705 706 error = puffs_newnode(mp, dvp, ap->a_vpp, 707 mknod_msg->pvnr_newnode, cnp, ap->a_vap->va_type, 708 ap->a_vap->va_rdev); 709 if (error) 710 puffs_abortbutton(pmp, PUFFS_ABORT_MKNOD, dpn->pn_cookie, 711 mknod_msg->pvnr_newnode, cnp); 712 713 out: 714 PUFFS_MSG_RELEASE(mknod); 715 if (error || (cnp->cn_flags & SAVESTART) == 0) 716 PNBUF_PUT(cnp->cn_pnbuf); 717 RELEPN_AND_VP(dvp, dpn); 718 return error; 719 } 720 721 int 722 puffs_vnop_open(void *v) 723 { 724 struct vop_open_args /* { 725 const struct vnodeop_desc *a_desc; 726 struct vnode *a_vp; 727 int a_mode; 728 kauth_cred_t a_cred; 729 } */ *ap = v; 730 PUFFS_MSG_VARS(vn, open); 731 struct vnode *vp = ap->a_vp; 732 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 733 int mode = ap->a_mode; 734 int error; 735 736 DPRINTF(("puffs_open: vp %p, mode 0x%x\n", vp, mode)); 737 738 if (vp->v_type == VREG && mode & FWRITE && !EXISTSOP(pmp, WRITE)) 739 ERROUT(EROFS); 740 741 if (!EXISTSOP(pmp, OPEN)) 742 ERROUT(0); 743 744 PUFFS_MSG_ALLOC(vn, open); 745 open_msg->pvnr_mode = mode; 746 puffs_credcvt(&open_msg->pvnr_cred, ap->a_cred); 747 puffs_msg_setinfo(park_open, PUFFSOP_VN, 748 PUFFS_VN_OPEN, VPTOPNC(vp)); 749 750 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_open, vp->v_data, NULL, error); 751 error = checkerr(pmp, error, __func__); 752 753 out: 754 DPRINTF(("puffs_open: returning %d\n", error)); 755 PUFFS_MSG_RELEASE(open); 756 return error; 757 } 758 759 int 760 puffs_vnop_close(void *v) 761 { 762 struct vop_close_args /* { 763 const struct vnodeop_desc *a_desc; 764 struct vnode *a_vp; 765 int a_fflag; 766 kauth_cred_t a_cred; 767 } */ *ap = v; 768 PUFFS_MSG_VARS(vn, close); 769 struct vnode *vp = ap->a_vp; 770 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 771 772 PUFFS_MSG_ALLOC(vn, close); 773 puffs_msg_setfaf(park_close); 774 close_msg->pvnr_fflag = ap->a_fflag; 775 puffs_credcvt(&close_msg->pvnr_cred, ap->a_cred); 776 puffs_msg_setinfo(park_close, PUFFSOP_VN, 777 PUFFS_VN_CLOSE, VPTOPNC(vp)); 778 779 puffs_msg_enqueue(pmp, park_close); 780 PUFFS_MSG_RELEASE(close); 781 return 0; 782 } 783 784 int 785 puffs_vnop_access(void *v) 786 { 787 struct vop_access_args /* { 788 const struct vnodeop_desc *a_desc; 789 struct vnode *a_vp; 790 int a_mode; 791 kauth_cred_t a_cred; 792 } */ *ap = v; 793 PUFFS_MSG_VARS(vn, access); 794 struct vnode *vp = ap->a_vp; 795 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 796 int mode = ap->a_mode; 797 int error; 798 799 if (mode & VWRITE) { 800 switch (vp->v_type) { 801 case VDIR: 802 case VLNK: 803 case VREG: 804 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 805 || !EXISTSOP(pmp, WRITE)) 806 return EROFS; 807 break; 808 default: 809 break; 810 } 811 } 812 813 if (!EXISTSOP(pmp, ACCESS)) 814 return 0; 815 816 PUFFS_MSG_ALLOC(vn, access); 817 access_msg->pvnr_mode = ap->a_mode; 818 puffs_credcvt(&access_msg->pvnr_cred, ap->a_cred); 819 puffs_msg_setinfo(park_access, PUFFSOP_VN, 820 PUFFS_VN_ACCESS, VPTOPNC(vp)); 821 822 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_access, vp->v_data, NULL, error); 823 error = checkerr(pmp, error, __func__); 824 PUFFS_MSG_RELEASE(access); 825 826 return error; 827 } 828 829 int 830 puffs_vnop_getattr(void *v) 831 { 832 struct vop_getattr_args /* { 833 const struct vnodeop_desc *a_desc; 834 struct vnode *a_vp; 835 struct vattr *a_vap; 836 kauth_cred_t a_cred; 837 } */ *ap = v; 838 PUFFS_MSG_VARS(vn, getattr); 839 struct vnode *vp = ap->a_vp; 840 struct mount *mp = vp->v_mount; 841 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 842 struct vattr *vap, *rvap; 843 struct puffs_node *pn; 844 int error = 0; 845 846 vap = ap->a_vap; 847 848 PUFFS_MSG_ALLOC(vn, getattr); 849 vattr_null(&getattr_msg->pvnr_va); 850 puffs_credcvt(&getattr_msg->pvnr_cred, ap->a_cred); 851 puffs_msg_setinfo(park_getattr, PUFFSOP_VN, 852 PUFFS_VN_GETATTR, VPTOPNC(vp)); 853 854 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_getattr, vp->v_data, NULL, error); 855 error = checkerr(pmp, error, __func__); 856 if (error) 857 goto out; 858 859 rvap = &getattr_msg->pvnr_va; 860 /* 861 * Don't listen to the file server regarding special device 862 * size info, the file server doesn't know anything about them. 863 */ 864 if (vp->v_type == VBLK || vp->v_type == VCHR) 865 rvap->va_size = vp->v_size; 866 867 /* Ditto for blocksize (ufs comment: this doesn't belong here) */ 868 if (vp->v_type == VBLK) 869 rvap->va_blocksize = BLKDEV_IOSIZE; 870 else if (vp->v_type == VCHR) 871 rvap->va_blocksize = MAXBSIZE; 872 873 (void) memcpy(vap, rvap, sizeof(struct vattr)); 874 vap->va_fsid = mp->mnt_stat.f_fsidx.__fsid_val[0]; 875 876 pn = VPTOPP(vp); 877 if (pn->pn_stat & PNODE_METACACHE_ATIME) 878 vap->va_atime = pn->pn_mc_atime; 879 if (pn->pn_stat & PNODE_METACACHE_CTIME) 880 vap->va_ctime = pn->pn_mc_ctime; 881 if (pn->pn_stat & PNODE_METACACHE_MTIME) 882 vap->va_mtime = pn->pn_mc_mtime; 883 if (pn->pn_stat & PNODE_METACACHE_SIZE) { 884 vap->va_size = pn->pn_mc_size; 885 } else { 886 if (rvap->va_size != VNOVAL 887 && vp->v_type != VBLK && vp->v_type != VCHR) { 888 uvm_vnp_setsize(vp, rvap->va_size); 889 pn->pn_serversize = rvap->va_size; 890 } 891 } 892 893 out: 894 PUFFS_MSG_RELEASE(getattr); 895 return error; 896 } 897 898 static int 899 dosetattr(struct vnode *vp, struct vattr *vap, kauth_cred_t cred, int chsize) 900 { 901 PUFFS_MSG_VARS(vn, setattr); 902 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 903 struct puffs_node *pn = vp->v_data; 904 int error; 905 906 if ((vp->v_mount->mnt_flag & MNT_RDONLY) && 907 (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL 908 || vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL 909 || vap->va_mode != (mode_t)VNOVAL)) 910 return EROFS; 911 912 if ((vp->v_mount->mnt_flag & MNT_RDONLY) 913 && vp->v_type == VREG && vap->va_size != VNOVAL) 914 return EROFS; 915 916 /* 917 * Flush metacache first. If we are called with some explicit 918 * parameters, treat them as information overriding metacache 919 * information. 920 */ 921 if (pn->pn_stat & PNODE_METACACHE_MASK) { 922 if ((pn->pn_stat & PNODE_METACACHE_ATIME) 923 && vap->va_atime.tv_sec == VNOVAL) 924 vap->va_atime = pn->pn_mc_atime; 925 if ((pn->pn_stat & PNODE_METACACHE_CTIME) 926 && vap->va_ctime.tv_sec == VNOVAL) 927 vap->va_ctime = pn->pn_mc_ctime; 928 if ((pn->pn_stat & PNODE_METACACHE_MTIME) 929 && vap->va_mtime.tv_sec == VNOVAL) 930 vap->va_mtime = pn->pn_mc_mtime; 931 if ((pn->pn_stat & PNODE_METACACHE_SIZE) 932 && vap->va_size == VNOVAL) 933 vap->va_size = pn->pn_mc_size; 934 935 pn->pn_stat &= ~PNODE_METACACHE_MASK; 936 } 937 938 PUFFS_MSG_ALLOC(vn, setattr); 939 (void)memcpy(&setattr_msg->pvnr_va, vap, sizeof(struct vattr)); 940 puffs_credcvt(&setattr_msg->pvnr_cred, cred); 941 puffs_msg_setinfo(park_setattr, PUFFSOP_VN, 942 PUFFS_VN_SETATTR, VPTOPNC(vp)); 943 944 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_setattr, vp->v_data, NULL, error); 945 PUFFS_MSG_RELEASE(setattr); 946 error = checkerr(pmp, error, __func__); 947 if (error) 948 return error; 949 950 if (vap->va_size != VNOVAL) { 951 pn->pn_serversize = vap->va_size; 952 if (chsize) 953 uvm_vnp_setsize(vp, vap->va_size); 954 } 955 956 return 0; 957 } 958 959 int 960 puffs_vnop_setattr(void *v) 961 { 962 struct vop_getattr_args /* { 963 const struct vnodeop_desc *a_desc; 964 struct vnode *a_vp; 965 struct vattr *a_vap; 966 kauth_cred_t a_cred; 967 } */ *ap = v; 968 969 return dosetattr(ap->a_vp, ap->a_vap, ap->a_cred, 1); 970 } 971 972 static __inline int 973 doinact(struct puffs_mount *pmp, int iaflag) 974 { 975 976 if (EXISTSOP(pmp, INACTIVE)) 977 if (pmp->pmp_flags & PUFFS_KFLAG_IAONDEMAND) 978 if (iaflag || ALLOPS(pmp)) 979 return 1; 980 else 981 return 0; 982 else 983 return 1; 984 else 985 return 0; 986 } 987 988 static void 989 callinactive(struct puffs_mount *pmp, void *cookie, int iaflag) 990 { 991 int error; 992 PUFFS_MSG_VARS(vn, inactive); 993 994 if (doinact(pmp, iaflag)) { 995 PUFFS_MSG_ALLOC(vn, inactive); 996 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 997 PUFFS_VN_INACTIVE, cookie); 998 999 PUFFS_MSG_ENQUEUEWAIT(pmp, park_inactive, error); 1000 PUFFS_MSG_RELEASE(inactive); 1001 } 1002 } 1003 1004 /* XXX: callinactive can't setback */ 1005 int 1006 puffs_vnop_inactive(void *v) 1007 { 1008 struct vop_inactive_args /* { 1009 const struct vnodeop_desc *a_desc; 1010 struct vnode *a_vp; 1011 } */ *ap = v; 1012 PUFFS_MSG_VARS(vn, inactive); 1013 struct vnode *vp = ap->a_vp; 1014 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1015 struct puffs_node *pnode; 1016 int error; 1017 1018 pnode = vp->v_data; 1019 1020 if (doinact(pmp, pnode->pn_stat & PNODE_DOINACT)) { 1021 PUFFS_MSG_ALLOC(vn, inactive); 1022 puffs_msg_setinfo(park_inactive, PUFFSOP_VN, 1023 PUFFS_VN_INACTIVE, VPTOPNC(vp)); 1024 1025 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_inactive, vp->v_data, 1026 NULL, error); 1027 PUFFS_MSG_RELEASE(inactive); 1028 } 1029 pnode->pn_stat &= ~PNODE_DOINACT; 1030 1031 /* 1032 * file server thinks it's gone? then don't be afraid care, 1033 * node's life was already all it would ever be 1034 */ 1035 *ap->a_recycle = ((pnode->pn_stat & PNODE_NOREFS) != 0); 1036 1037 VOP_UNLOCK(vp, 0); 1038 1039 return 0; 1040 } 1041 1042 static void 1043 callreclaim(struct puffs_mount *pmp, void *cookie) 1044 { 1045 PUFFS_MSG_VARS(vn, reclaim); 1046 1047 if (!EXISTSOP(pmp, RECLAIM)) 1048 return; 1049 1050 PUFFS_MSG_ALLOC(vn, reclaim); 1051 puffs_msg_setfaf(park_reclaim); 1052 puffs_msg_setinfo(park_reclaim, PUFFSOP_VN, PUFFS_VN_RECLAIM, cookie); 1053 1054 puffs_msg_enqueue(pmp, park_reclaim); 1055 PUFFS_MSG_RELEASE(reclaim); 1056 } 1057 1058 /* 1059 * always FAF, we don't really care if the server wants to fail to 1060 * reclaim the node or not 1061 */ 1062 int 1063 puffs_vnop_reclaim(void *v) 1064 { 1065 struct vop_reclaim_args /* { 1066 const struct vnodeop_desc *a_desc; 1067 struct vnode *a_vp; 1068 } */ *ap = v; 1069 struct vnode *vp = ap->a_vp; 1070 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1071 1072 /* 1073 * first things first: check if someone is trying to reclaim the 1074 * root vnode. do not allow that to travel to userspace. 1075 * Note that we don't need to take the lock similarly to 1076 * puffs_root(), since there is only one of us. 1077 */ 1078 if (vp->v_vflag & VV_ROOT) { 1079 mutex_enter(&pmp->pmp_lock); 1080 KASSERT(pmp->pmp_root != NULL); 1081 pmp->pmp_root = NULL; 1082 mutex_exit(&pmp->pmp_lock); 1083 goto out; 1084 } 1085 1086 callreclaim(MPTOPUFFSMP(vp->v_mount), VPTOPNC(vp)); 1087 1088 out: 1089 if (PUFFS_USE_NAMECACHE(pmp)) 1090 cache_purge(vp); 1091 puffs_putvnode(vp); 1092 1093 return 0; 1094 } 1095 1096 #define CSIZE sizeof(**ap->a_cookies) 1097 int 1098 puffs_vnop_readdir(void *v) 1099 { 1100 struct vop_readdir_args /* { 1101 const struct vnodeop_desc *a_desc; 1102 struct vnode *a_vp; 1103 struct uio *a_uio; 1104 kauth_cred_t a_cred; 1105 int *a_eofflag; 1106 off_t **a_cookies; 1107 int *a_ncookies; 1108 } */ *ap = v; 1109 PUFFS_MSG_VARS(vn, readdir); 1110 struct vnode *vp = ap->a_vp; 1111 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1112 size_t argsize, tomove, cookiemem, cookiesmax; 1113 struct uio *uio = ap->a_uio; 1114 size_t howmuch, resid; 1115 int error; 1116 1117 /* 1118 * ok, so we need: resid + cookiemem = maxreq 1119 * => resid + cookiesize * (resid/minsize) = maxreq 1120 * => resid + cookiesize/minsize * resid = maxreq 1121 * => (cookiesize/minsize + 1) * resid = maxreq 1122 * => resid = maxreq / (cookiesize/minsize + 1) 1123 * 1124 * Since cookiesize <= minsize and we're not very big on floats, 1125 * we approximate that to be 1. Therefore: 1126 * 1127 * resid = maxreq / 2; 1128 * 1129 * Well, at least we didn't have to use differential equations 1130 * or the Gram-Schmidt process. 1131 * 1132 * (yes, I'm very afraid of this) 1133 */ 1134 KASSERT(CSIZE <= _DIRENT_MINSIZE((struct dirent *)0)); 1135 1136 if (ap->a_cookies) { 1137 KASSERT(ap->a_ncookies != NULL); 1138 if (pmp->pmp_args.pa_fhsize == 0) 1139 return EOPNOTSUPP; 1140 resid = PUFFS_TOMOVE(uio->uio_resid, pmp) / 2; 1141 cookiesmax = resid/_DIRENT_MINSIZE((struct dirent *)0); 1142 cookiemem = ALIGN(cookiesmax*CSIZE); /* play safe */ 1143 } else { 1144 resid = PUFFS_TOMOVE(uio->uio_resid, pmp); 1145 cookiesmax = 0; 1146 cookiemem = 0; 1147 } 1148 1149 argsize = sizeof(struct puffs_vnmsg_readdir); 1150 tomove = resid + cookiemem; 1151 puffs_msgmem_alloc(argsize + tomove, &park_readdir, 1152 (void *)&readdir_msg, 1); 1153 1154 puffs_credcvt(&readdir_msg->pvnr_cred, ap->a_cred); 1155 readdir_msg->pvnr_offset = uio->uio_offset; 1156 readdir_msg->pvnr_resid = resid; 1157 readdir_msg->pvnr_ncookies = cookiesmax; 1158 readdir_msg->pvnr_eofflag = 0; 1159 readdir_msg->pvnr_dentoff = cookiemem; 1160 puffs_msg_setinfo(park_readdir, PUFFSOP_VN, 1161 PUFFS_VN_READDIR, VPTOPNC(vp)); 1162 puffs_msg_setdelta(park_readdir, tomove); 1163 1164 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readdir, vp->v_data, NULL, error); 1165 error = checkerr(pmp, error, __func__); 1166 if (error) 1167 goto out; 1168 1169 /* userspace is cheating? */ 1170 if (readdir_msg->pvnr_resid > resid) { 1171 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1172 "resid grew", VPTOPNC(vp)); 1173 ERROUT(EPROTO); 1174 } 1175 if (readdir_msg->pvnr_ncookies > cookiesmax) { 1176 puffs_senderr(pmp, PUFFS_ERR_READDIR, E2BIG, 1177 "too many cookies", VPTOPNC(vp)); 1178 ERROUT(EPROTO); 1179 } 1180 1181 /* check eof */ 1182 if (readdir_msg->pvnr_eofflag) 1183 *ap->a_eofflag = 1; 1184 1185 /* bouncy-wouncy with the directory data */ 1186 howmuch = resid - readdir_msg->pvnr_resid; 1187 1188 /* force eof if no data was returned (getcwd() needs this) */ 1189 if (howmuch == 0) { 1190 *ap->a_eofflag = 1; 1191 goto out; 1192 } 1193 1194 error = uiomove(readdir_msg->pvnr_data + cookiemem, howmuch, uio); 1195 if (error) 1196 goto out; 1197 1198 /* provide cookies to caller if so desired */ 1199 if (ap->a_cookies) { 1200 *ap->a_cookies = malloc(readdir_msg->pvnr_ncookies*CSIZE, 1201 M_TEMP, M_WAITOK); 1202 *ap->a_ncookies = readdir_msg->pvnr_ncookies; 1203 memcpy(*ap->a_cookies, readdir_msg->pvnr_data, 1204 *ap->a_ncookies*CSIZE); 1205 } 1206 1207 /* next readdir starts here */ 1208 uio->uio_offset = readdir_msg->pvnr_offset; 1209 1210 out: 1211 puffs_msgmem_release(park_readdir); 1212 return error; 1213 } 1214 #undef CSIZE 1215 1216 /* 1217 * poll works by consuming the bitmask in pn_revents. If there are 1218 * events available, poll returns immediately. If not, it issues a 1219 * poll to userspace, selrecords itself and returns with no available 1220 * events. When the file server returns, it executes puffs_parkdone_poll(), 1221 * where available events are added to the bitmask. selnotify() is 1222 * then also executed by that function causing us to enter here again 1223 * and hopefully find the missing bits (unless someone got them first, 1224 * in which case it starts all over again). 1225 */ 1226 int 1227 puffs_vnop_poll(void *v) 1228 { 1229 struct vop_poll_args /* { 1230 const struct vnodeop_desc *a_desc; 1231 struct vnode *a_vp; 1232 int a_events; 1233 }*/ *ap = v; 1234 PUFFS_MSG_VARS(vn, poll); 1235 struct vnode *vp = ap->a_vp; 1236 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1237 struct puffs_node *pn = vp->v_data; 1238 int events, error; 1239 1240 if (EXISTSOP(pmp, POLL)) { 1241 mutex_enter(&pn->pn_mtx); 1242 events = pn->pn_revents & ap->a_events; 1243 if (events & ap->a_events) { 1244 pn->pn_revents &= ~ap->a_events; 1245 mutex_exit(&pn->pn_mtx); 1246 1247 return events; 1248 } else { 1249 puffs_referencenode(pn); 1250 mutex_exit(&pn->pn_mtx); 1251 1252 PUFFS_MSG_ALLOC(vn, poll); 1253 poll_msg->pvnr_events = ap->a_events; 1254 puffs_msg_setinfo(park_poll, PUFFSOP_VN, 1255 PUFFS_VN_POLL, VPTOPNC(vp)); 1256 puffs_msg_setcall(park_poll, puffs_parkdone_poll, pn); 1257 selrecord(curlwp, &pn->pn_sel); 1258 1259 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_poll, vp->v_data, 1260 NULL, error); 1261 PUFFS_MSG_RELEASE(poll); 1262 1263 return 0; 1264 } 1265 } else { 1266 return genfs_poll(v); 1267 } 1268 } 1269 1270 int 1271 puffs_vnop_fsync(void *v) 1272 { 1273 struct vop_fsync_args /* { 1274 const struct vnodeop_desc *a_desc; 1275 struct vnode *a_vp; 1276 kauth_cred_t a_cred; 1277 int a_flags; 1278 off_t a_offlo; 1279 off_t a_offhi; 1280 } */ *ap = v; 1281 PUFFS_MSG_VARS(vn, fsync); 1282 struct vnode *vp = ap->a_vp; 1283 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1284 struct puffs_node *pn; 1285 struct vattr va; 1286 int pflags, error, dofaf; 1287 1288 pn = VPTOPP(vp); 1289 1290 /* flush out information from our metacache, see vop_setattr */ 1291 if (pn->pn_stat & PNODE_METACACHE_MASK) { 1292 vattr_null(&va); 1293 error = VOP_SETATTR(vp, &va, FSCRED); 1294 if (error) 1295 return error; 1296 } 1297 1298 /* 1299 * flush pages to avoid being overly dirty 1300 */ 1301 pflags = PGO_CLEANIT; 1302 if (ap->a_flags & FSYNC_WAIT) 1303 pflags |= PGO_SYNCIO; 1304 mutex_enter(&vp->v_interlock); 1305 error = VOP_PUTPAGES(vp, trunc_page(ap->a_offlo), 1306 round_page(ap->a_offhi), pflags); 1307 if (error) 1308 return error; 1309 1310 /* 1311 * HELLO! We exit already here if the user server does not 1312 * support fsync OR if we should call fsync for a node which 1313 * has references neither in the kernel or the fs server. 1314 * Otherwise we continue to issue fsync() forward. 1315 */ 1316 if (!EXISTSOP(pmp, FSYNC)) 1317 return 0; 1318 1319 dofaf = (ap->a_flags & FSYNC_WAIT) == 0 || ap->a_flags == FSYNC_LAZY; 1320 /* 1321 * We abuse VXLOCK to mean "vnode is going to die", so we issue 1322 * only FAFs for those. Otherwise there's a danger of deadlock, 1323 * since the execution context here might be the user server 1324 * doing some operation on another fs, which in turn caused a 1325 * vnode to be reclaimed from the freelist for this fs. 1326 */ 1327 if (dofaf == 0) { 1328 mutex_enter(&vp->v_interlock); 1329 if (vp->v_iflag & VI_XLOCK) 1330 dofaf = 1; 1331 mutex_exit(&vp->v_interlock); 1332 } 1333 1334 PUFFS_MSG_ALLOC(vn, fsync); 1335 if (dofaf) 1336 puffs_msg_setfaf(park_fsync); 1337 1338 puffs_credcvt(&fsync_msg->pvnr_cred, ap->a_cred); 1339 fsync_msg->pvnr_flags = ap->a_flags; 1340 fsync_msg->pvnr_offlo = ap->a_offlo; 1341 fsync_msg->pvnr_offhi = ap->a_offhi; 1342 puffs_msg_setinfo(park_fsync, PUFFSOP_VN, 1343 PUFFS_VN_FSYNC, VPTOPNC(vp)); 1344 1345 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_fsync, vp->v_data, NULL, error); 1346 PUFFS_MSG_RELEASE(fsync); 1347 1348 error = checkerr(pmp, error, __func__); 1349 1350 return error; 1351 } 1352 1353 int 1354 puffs_vnop_seek(void *v) 1355 { 1356 struct vop_seek_args /* { 1357 const struct vnodeop_desc *a_desc; 1358 struct vnode *a_vp; 1359 off_t a_oldoff; 1360 off_t a_newoff; 1361 kauth_cred_t a_cred; 1362 } */ *ap = v; 1363 PUFFS_MSG_VARS(vn, seek); 1364 struct vnode *vp = ap->a_vp; 1365 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1366 int error; 1367 1368 PUFFS_MSG_ALLOC(vn, seek); 1369 seek_msg->pvnr_oldoff = ap->a_oldoff; 1370 seek_msg->pvnr_newoff = ap->a_newoff; 1371 puffs_credcvt(&seek_msg->pvnr_cred, ap->a_cred); 1372 puffs_msg_setinfo(park_seek, PUFFSOP_VN, 1373 PUFFS_VN_SEEK, VPTOPNC(vp)); 1374 1375 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_seek, vp->v_data, NULL, error); 1376 PUFFS_MSG_RELEASE(seek); 1377 return checkerr(pmp, error, __func__); 1378 } 1379 1380 static int 1381 callremove(struct puffs_mount *pmp, void *dcookie, void *cookie, 1382 struct componentname *cnp) 1383 { 1384 PUFFS_MSG_VARS(vn, remove); 1385 int error; 1386 1387 PUFFS_MSG_ALLOC(vn, remove); 1388 remove_msg->pvnr_cookie_targ = cookie; 1389 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1390 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1391 puffs_msg_setinfo(park_remove, PUFFSOP_VN, PUFFS_VN_REMOVE, dcookie); 1392 1393 PUFFS_MSG_ENQUEUEWAIT(pmp, park_remove, error); 1394 PUFFS_MSG_RELEASE(remove); 1395 1396 return checkerr(pmp, error, __func__); 1397 } 1398 1399 /* 1400 * XXX: can't use callremove now because can't catch setbacks with 1401 * it due to lack of a pnode argument. 1402 */ 1403 int 1404 puffs_vnop_remove(void *v) 1405 { 1406 struct vop_remove_args /* { 1407 const struct vnodeop_desc *a_desc; 1408 struct vnode *a_dvp; 1409 struct vnode *a_vp; 1410 struct componentname *a_cnp; 1411 } */ *ap = v; 1412 PUFFS_MSG_VARS(vn, remove); 1413 struct vnode *dvp = ap->a_dvp; 1414 struct vnode *vp = ap->a_vp; 1415 struct puffs_node *dpn = VPTOPP(dvp); 1416 struct puffs_node *pn = VPTOPP(vp); 1417 struct componentname *cnp = ap->a_cnp; 1418 struct mount *mp = dvp->v_mount; 1419 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1420 int error; 1421 1422 PUFFS_MSG_ALLOC(vn, remove); 1423 remove_msg->pvnr_cookie_targ = VPTOPNC(vp); 1424 puffs_makecn(&remove_msg->pvnr_cn, &remove_msg->pvnr_cn_cred, 1425 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1426 puffs_msg_setinfo(park_remove, PUFFSOP_VN, 1427 PUFFS_VN_REMOVE, VPTOPNC(dvp)); 1428 1429 puffs_msg_enqueue(pmp, park_remove); 1430 REFPN_AND_UNLOCKVP(dvp, dpn); 1431 if (dvp == vp) 1432 REFPN(pn); 1433 else 1434 REFPN_AND_UNLOCKVP(vp, pn); 1435 error = puffs_msg_wait2(pmp, park_remove, dpn, pn); 1436 1437 PUFFS_MSG_RELEASE(remove); 1438 1439 RELEPN_AND_VP(dvp, dpn); 1440 RELEPN_AND_VP(vp, pn); 1441 1442 error = checkerr(pmp, error, __func__); 1443 return error; 1444 } 1445 1446 int 1447 puffs_vnop_mkdir(void *v) 1448 { 1449 struct vop_mkdir_args /* { 1450 const struct vnodeop_desc *a_desc; 1451 struct vnode *a_dvp; 1452 struct vnode **a_vpp; 1453 struct componentname *a_cnp; 1454 struct vattr *a_vap; 1455 } */ *ap = v; 1456 PUFFS_MSG_VARS(vn, mkdir); 1457 struct vnode *dvp = ap->a_dvp; 1458 struct puffs_node *dpn = VPTOPP(dvp); 1459 struct componentname *cnp = ap->a_cnp; 1460 struct mount *mp = dvp->v_mount; 1461 struct puffs_mount *pmp = MPTOPUFFSMP(mp); 1462 int error; 1463 1464 PUFFS_MSG_ALLOC(vn, mkdir); 1465 puffs_makecn(&mkdir_msg->pvnr_cn, &mkdir_msg->pvnr_cn_cred, 1466 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1467 mkdir_msg->pvnr_va = *ap->a_vap; 1468 puffs_msg_setinfo(park_mkdir, PUFFSOP_VN, 1469 PUFFS_VN_MKDIR, VPTOPNC(dvp)); 1470 1471 puffs_msg_enqueue(pmp, park_mkdir); 1472 REFPN_AND_UNLOCKVP(dvp, dpn); 1473 error = puffs_msg_wait2(pmp, park_mkdir, dpn, NULL); 1474 1475 error = checkerr(pmp, error, __func__); 1476 if (error) 1477 goto out; 1478 1479 error = puffs_newnode(mp, dvp, ap->a_vpp, 1480 mkdir_msg->pvnr_newnode, cnp, VDIR, 0); 1481 if (error) 1482 puffs_abortbutton(pmp, PUFFS_ABORT_MKDIR, dpn->pn_cookie, 1483 mkdir_msg->pvnr_newnode, cnp); 1484 1485 out: 1486 PUFFS_MSG_RELEASE(mkdir); 1487 if (error || (cnp->cn_flags & SAVESTART) == 0) 1488 PNBUF_PUT(cnp->cn_pnbuf); 1489 RELEPN_AND_VP(dvp, dpn); 1490 return error; 1491 } 1492 1493 static int 1494 callrmdir(struct puffs_mount *pmp, void *dcookie, void *cookie, 1495 struct componentname *cnp) 1496 { 1497 PUFFS_MSG_VARS(vn, rmdir); 1498 int error; 1499 1500 PUFFS_MSG_ALLOC(vn, rmdir); 1501 rmdir_msg->pvnr_cookie_targ = cookie; 1502 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1503 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1504 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, PUFFS_VN_RMDIR, dcookie); 1505 1506 PUFFS_MSG_ENQUEUEWAIT(pmp, park_rmdir, error); 1507 PUFFS_MSG_RELEASE(rmdir); 1508 1509 return checkerr(pmp, error, __func__); 1510 } 1511 1512 int 1513 puffs_vnop_rmdir(void *v) 1514 { 1515 struct vop_rmdir_args /* { 1516 const struct vnodeop_desc *a_desc; 1517 struct vnode *a_dvp; 1518 struct vnode *a_vp; 1519 struct componentname *a_cnp; 1520 } */ *ap = v; 1521 PUFFS_MSG_VARS(vn, rmdir); 1522 struct vnode *dvp = ap->a_dvp; 1523 struct vnode *vp = ap->a_vp; 1524 struct puffs_node *dpn = VPTOPP(dvp); 1525 struct puffs_node *pn = VPTOPP(vp); 1526 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1527 struct componentname *cnp = ap->a_cnp; 1528 int error; 1529 1530 PUFFS_MSG_ALLOC(vn, rmdir); 1531 rmdir_msg->pvnr_cookie_targ = VPTOPNC(vp); 1532 puffs_makecn(&rmdir_msg->pvnr_cn, &rmdir_msg->pvnr_cn_cred, 1533 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1534 puffs_msg_setinfo(park_rmdir, PUFFSOP_VN, 1535 PUFFS_VN_RMDIR, VPTOPNC(dvp)); 1536 1537 puffs_msg_enqueue(pmp, park_rmdir); 1538 REFPN_AND_UNLOCKVP(dvp, dpn); 1539 REFPN_AND_UNLOCKVP(vp, pn); 1540 error = puffs_msg_wait2(pmp, park_rmdir, dpn, pn); 1541 1542 PUFFS_MSG_RELEASE(rmdir); 1543 1544 /* XXX: some call cache_purge() *for both vnodes* here, investigate */ 1545 RELEPN_AND_VP(dvp, dpn); 1546 RELEPN_AND_VP(vp, pn); 1547 1548 return error; 1549 } 1550 1551 int 1552 puffs_vnop_link(void *v) 1553 { 1554 struct vop_link_args /* { 1555 const struct vnodeop_desc *a_desc; 1556 struct vnode *a_dvp; 1557 struct vnode *a_vp; 1558 struct componentname *a_cnp; 1559 }*/ *ap = v; 1560 PUFFS_MSG_VARS(vn, link); 1561 struct vnode *dvp = ap->a_dvp; 1562 struct vnode *vp = ap->a_vp; 1563 struct puffs_node *dpn = VPTOPP(dvp); 1564 struct puffs_node *pn = VPTOPP(vp); 1565 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1566 struct componentname *cnp = ap->a_cnp; 1567 int error; 1568 1569 PUFFS_MSG_ALLOC(vn, link); 1570 link_msg->pvnr_cookie_targ = VPTOPNC(vp); 1571 puffs_makecn(&link_msg->pvnr_cn, &link_msg->pvnr_cn_cred, 1572 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1573 puffs_msg_setinfo(park_link, PUFFSOP_VN, 1574 PUFFS_VN_LINK, VPTOPNC(dvp)); 1575 1576 puffs_msg_enqueue(pmp, park_link); 1577 REFPN_AND_UNLOCKVP(dvp, dpn); 1578 REFPN(pn); 1579 error = puffs_msg_wait2(pmp, park_link, dpn, pn); 1580 1581 PUFFS_MSG_RELEASE(link); 1582 1583 error = checkerr(pmp, error, __func__); 1584 1585 /* 1586 * XXX: stay in touch with the cache. I don't like this, but 1587 * don't have a better solution either. See also puffs_rename(). 1588 */ 1589 if (error == 0) 1590 puffs_updatenode(pn, PUFFS_UPDATECTIME, 0); 1591 1592 PNBUF_PUT(cnp->cn_pnbuf); 1593 RELEPN_AND_VP(dvp, dpn); 1594 puffs_releasenode(pn); 1595 1596 return error; 1597 } 1598 1599 int 1600 puffs_vnop_symlink(void *v) 1601 { 1602 struct vop_symlink_args /* { 1603 const struct vnodeop_desc *a_desc; 1604 struct vnode *a_dvp; 1605 struct vnode **a_vpp; 1606 struct componentname *a_cnp; 1607 struct vattr *a_vap; 1608 char *a_target; 1609 }*/ *ap = v; 1610 PUFFS_MSG_VARS(vn, symlink); 1611 struct vnode *dvp = ap->a_dvp; 1612 struct puffs_node *dpn = VPTOPP(dvp); 1613 struct mount *mp = dvp->v_mount; 1614 struct puffs_mount *pmp = MPTOPUFFSMP(dvp->v_mount); 1615 struct componentname *cnp = ap->a_cnp; 1616 int error; 1617 1618 *ap->a_vpp = NULL; 1619 1620 PUFFS_MSG_ALLOC(vn, symlink); 1621 puffs_makecn(&symlink_msg->pvnr_cn, &symlink_msg->pvnr_cn_cred, 1622 cnp, PUFFS_USE_FULLPNBUF(pmp)); 1623 symlink_msg->pvnr_va = *ap->a_vap; 1624 (void)strlcpy(symlink_msg->pvnr_link, ap->a_target, 1625 sizeof(symlink_msg->pvnr_link)); 1626 puffs_msg_setinfo(park_symlink, PUFFSOP_VN, 1627 PUFFS_VN_SYMLINK, VPTOPNC(dvp)); 1628 1629 puffs_msg_enqueue(pmp, park_symlink); 1630 REFPN_AND_UNLOCKVP(dvp, dpn); 1631 error = puffs_msg_wait2(pmp, park_symlink, dpn, NULL); 1632 1633 error = checkerr(pmp, error, __func__); 1634 if (error) 1635 goto out; 1636 1637 error = puffs_newnode(mp, dvp, ap->a_vpp, 1638 symlink_msg->pvnr_newnode, cnp, VLNK, 0); 1639 if (error) 1640 puffs_abortbutton(pmp, PUFFS_ABORT_SYMLINK, dpn->pn_cookie, 1641 symlink_msg->pvnr_newnode, cnp); 1642 1643 out: 1644 PUFFS_MSG_RELEASE(symlink); 1645 if (error || (cnp->cn_flags & SAVESTART) == 0) 1646 PNBUF_PUT(cnp->cn_pnbuf); 1647 RELEPN_AND_VP(dvp, dpn); 1648 1649 return error; 1650 } 1651 1652 int 1653 puffs_vnop_readlink(void *v) 1654 { 1655 struct vop_readlink_args /* { 1656 const struct vnodeop_desc *a_desc; 1657 struct vnode *a_vp; 1658 struct uio *a_uio; 1659 kauth_cred_t a_cred; 1660 } */ *ap = v; 1661 PUFFS_MSG_VARS(vn, readlink); 1662 struct vnode *vp = ap->a_vp; 1663 struct puffs_mount *pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 1664 size_t linklen; 1665 int error; 1666 1667 PUFFS_MSG_ALLOC(vn, readlink); 1668 puffs_credcvt(&readlink_msg->pvnr_cred, ap->a_cred); 1669 linklen = sizeof(readlink_msg->pvnr_link); 1670 readlink_msg->pvnr_linklen = linklen; 1671 puffs_msg_setinfo(park_readlink, PUFFSOP_VN, 1672 PUFFS_VN_READLINK, VPTOPNC(vp)); 1673 1674 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_readlink, vp->v_data, NULL, error); 1675 error = checkerr(pmp, error, __func__); 1676 if (error) 1677 goto out; 1678 1679 /* bad bad user file server */ 1680 if (readlink_msg->pvnr_linklen > linklen) { 1681 puffs_senderr(pmp, PUFFS_ERR_READLINK, E2BIG, 1682 "linklen too big", VPTOPNC(ap->a_vp)); 1683 error = EPROTO; 1684 goto out; 1685 } 1686 1687 error = uiomove(&readlink_msg->pvnr_link, readlink_msg->pvnr_linklen, 1688 ap->a_uio); 1689 out: 1690 PUFFS_MSG_RELEASE(readlink); 1691 return error; 1692 } 1693 1694 int 1695 puffs_vnop_rename(void *v) 1696 { 1697 struct vop_rename_args /* { 1698 const struct vnodeop_desc *a_desc; 1699 struct vnode *a_fdvp; 1700 struct vnode *a_fvp; 1701 struct componentname *a_fcnp; 1702 struct vnode *a_tdvp; 1703 struct vnode *a_tvp; 1704 struct componentname *a_tcnp; 1705 }*/ *ap = v; 1706 PUFFS_MSG_VARS(vn, rename); 1707 struct vnode *fdvp = ap->a_fdvp; 1708 struct puffs_node *fpn = ap->a_fvp->v_data; 1709 struct puffs_mount *pmp = MPTOPUFFSMP(fdvp->v_mount); 1710 int error; 1711 1712 if (ap->a_fvp->v_mount != ap->a_tdvp->v_mount) 1713 ERROUT(EXDEV); 1714 1715 PUFFS_MSG_ALLOC(vn, rename); 1716 rename_msg->pvnr_cookie_src = VPTOPNC(ap->a_fvp); 1717 rename_msg->pvnr_cookie_targdir = VPTOPNC(ap->a_tdvp); 1718 if (ap->a_tvp) 1719 rename_msg->pvnr_cookie_targ = VPTOPNC(ap->a_tvp); 1720 else 1721 rename_msg->pvnr_cookie_targ = NULL; 1722 puffs_makecn(&rename_msg->pvnr_cn_src, &rename_msg->pvnr_cn_src_cred, 1723 ap->a_fcnp, PUFFS_USE_FULLPNBUF(pmp)); 1724 puffs_makecn(&rename_msg->pvnr_cn_targ, &rename_msg->pvnr_cn_targ_cred, 1725 ap->a_tcnp, PUFFS_USE_FULLPNBUF(pmp)); 1726 puffs_msg_setinfo(park_rename, PUFFSOP_VN, 1727 PUFFS_VN_RENAME, VPTOPNC(fdvp)); 1728 1729 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rename, fdvp->v_data, NULL, error); 1730 error = checkerr(pmp, error, __func__); 1731 1732 /* 1733 * XXX: stay in touch with the cache. I don't like this, but 1734 * don't have a better solution either. See also puffs_link(). 1735 */ 1736 if (error == 0) 1737 puffs_updatenode(fpn, PUFFS_UPDATECTIME, 0); 1738 1739 out: 1740 PUFFS_MSG_RELEASE(rename); 1741 if (ap->a_tvp != NULL) 1742 vput(ap->a_tvp); 1743 if (ap->a_tdvp == ap->a_tvp) 1744 vrele(ap->a_tdvp); 1745 else 1746 vput(ap->a_tdvp); 1747 1748 vrele(ap->a_fdvp); 1749 vrele(ap->a_fvp); 1750 1751 return error; 1752 } 1753 1754 #define RWARGS(cont, iofl, move, offset, creds) \ 1755 (cont)->pvnr_ioflag = (iofl); \ 1756 (cont)->pvnr_resid = (move); \ 1757 (cont)->pvnr_offset = (offset); \ 1758 puffs_credcvt(&(cont)->pvnr_cred, creds) 1759 1760 int 1761 puffs_vnop_read(void *v) 1762 { 1763 struct vop_read_args /* { 1764 const struct vnodeop_desc *a_desc; 1765 struct vnode *a_vp; 1766 struct uio *a_uio; 1767 int a_ioflag; 1768 kauth_cred_t a_cred; 1769 } */ *ap = v; 1770 PUFFS_MSG_VARS(vn, read); 1771 struct vnode *vp = ap->a_vp; 1772 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 1773 struct uio *uio = ap->a_uio; 1774 void *win; 1775 size_t tomove, argsize; 1776 vsize_t bytelen; 1777 int error, ubcflags; 1778 1779 read_msg = NULL; 1780 error = 0; 1781 1782 /* std sanity */ 1783 if (uio->uio_resid == 0) 1784 return 0; 1785 if (uio->uio_offset < 0) 1786 return EINVAL; 1787 1788 if (vp->v_type == VREG && PUFFS_USE_PAGECACHE(pmp)) { 1789 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1790 1791 ubcflags = 0; 1792 if (UBC_WANT_UNMAP(vp)) 1793 ubcflags = UBC_UNMAP; 1794 1795 while (uio->uio_resid > 0) { 1796 bytelen = MIN(uio->uio_resid, 1797 vp->v_size - uio->uio_offset); 1798 if (bytelen == 0) 1799 break; 1800 1801 win = ubc_alloc(&vp->v_uobj, uio->uio_offset, 1802 &bytelen, advice, UBC_READ); 1803 error = uiomove(win, bytelen, uio); 1804 ubc_release(win, ubcflags); 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; 1895 if (UBC_WANT_UNMAP(vp)) 1896 ubcflags |= UBC_UNMAP; 1897 1898 /* 1899 * userspace *should* be allowed to control this, 1900 * but with UBC it's a bit unclear how to handle it 1901 */ 1902 if (ap->a_ioflag & IO_APPEND) 1903 uio->uio_offset = vp->v_size; 1904 1905 origoff = uio->uio_offset; 1906 while (uio->uio_resid > 0) { 1907 uflags |= PUFFS_UPDATECTIME; 1908 uflags |= PUFFS_UPDATEMTIME; 1909 oldoff = uio->uio_offset; 1910 bytelen = uio->uio_resid; 1911 1912 newoff = oldoff + bytelen; 1913 if (vp->v_size < newoff) { 1914 uvm_vnp_setwritesize(vp, newoff); 1915 } 1916 error = ubc_uiomove(&vp->v_uobj, uio, bytelen, 1917 UVM_ADV_RANDOM, ubcflags); 1918 1919 /* 1920 * In case of a ubc_uiomove() error, 1921 * opt to not extend the file at all and 1922 * return an error. Otherwise, if we attempt 1923 * to clear the memory we couldn't fault to, 1924 * we might generate a kernel page fault. 1925 */ 1926 if (vp->v_size < newoff) { 1927 if (error == 0) { 1928 uflags |= PUFFS_UPDATESIZE; 1929 uvm_vnp_setsize(vp, newoff); 1930 } else { 1931 uvm_vnp_setwritesize(vp, vp->v_size); 1932 } 1933 } 1934 if (error) 1935 break; 1936 1937 /* 1938 * If we're writing large files, flush to file server 1939 * every 64k. Otherwise we can very easily exhaust 1940 * kernel and user memory, as the file server cannot 1941 * really keep up with our writing speed. 1942 * 1943 * Note: this does *NOT* honor MNT_ASYNC, because 1944 * that gives userland too much say in the kernel. 1945 */ 1946 if (oldoff >> 16 != uio->uio_offset >> 16) { 1947 mutex_enter(&vp->v_interlock); 1948 error = VOP_PUTPAGES(vp, oldoff & ~0xffff, 1949 uio->uio_offset & ~0xffff, 1950 PGO_CLEANIT | PGO_SYNCIO); 1951 if (error) 1952 break; 1953 } 1954 } 1955 1956 /* synchronous I/O? */ 1957 if (error == 0 && ap->a_ioflag & IO_SYNC) { 1958 mutex_enter(&vp->v_interlock); 1959 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1960 round_page(uio->uio_offset), 1961 PGO_CLEANIT | PGO_SYNCIO); 1962 1963 /* write through page cache? */ 1964 } else if (error == 0 && pmp->pmp_flags & PUFFS_KFLAG_WTCACHE) { 1965 mutex_enter(&vp->v_interlock); 1966 error = VOP_PUTPAGES(vp, trunc_page(origoff), 1967 round_page(uio->uio_offset), PGO_CLEANIT); 1968 } 1969 1970 puffs_updatenode(VPTOPP(vp), uflags, vp->v_size); 1971 } else { 1972 /* tomove is non-increasing */ 1973 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1974 argsize = sizeof(struct puffs_vnmsg_write) + tomove; 1975 puffs_msgmem_alloc(argsize, &park_write, (void *)&write_msg,1); 1976 1977 while (uio->uio_resid > 0) { 1978 /* move data to buffer */ 1979 tomove = PUFFS_TOMOVE(uio->uio_resid, pmp); 1980 memset(write_msg, 0, argsize); /* XXX: touser KASSERT */ 1981 RWARGS(write_msg, ap->a_ioflag, tomove, 1982 uio->uio_offset, ap->a_cred); 1983 error = uiomove(write_msg->pvnr_data, tomove, uio); 1984 if (error) 1985 break; 1986 1987 /* move buffer to userspace */ 1988 puffs_msg_setinfo(park_write, PUFFSOP_VN, 1989 PUFFS_VN_WRITE, VPTOPNC(vp)); 1990 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_write, vp->v_data, 1991 NULL, error); 1992 error = checkerr(pmp, error, __func__); 1993 if (error) 1994 break; 1995 1996 if (write_msg->pvnr_resid > tomove) { 1997 puffs_senderr(pmp, PUFFS_ERR_WRITE, 1998 E2BIG, "resid grew", VPTOPNC(ap->a_vp)); 1999 error = EPROTO; 2000 break; 2001 } 2002 2003 /* adjust file size */ 2004 if (vp->v_size < uio->uio_offset) 2005 uvm_vnp_setsize(vp, uio->uio_offset); 2006 2007 /* didn't move everything? bad userspace. bail */ 2008 if (write_msg->pvnr_resid != 0) { 2009 error = EIO; 2010 break; 2011 } 2012 } 2013 puffs_msgmem_release(park_write); 2014 } 2015 2016 return error; 2017 } 2018 2019 int 2020 puffs_vnop_print(void *v) 2021 { 2022 struct vop_print_args /* { 2023 struct vnode *a_vp; 2024 } */ *ap = v; 2025 PUFFS_MSG_VARS(vn, print); 2026 struct vnode *vp = ap->a_vp; 2027 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2028 struct puffs_node *pn = vp->v_data; 2029 int error; 2030 2031 /* kernel portion */ 2032 printf("tag VT_PUFFS, vnode %p, puffs node: %p,\n" 2033 " userspace cookie: %p\n", vp, pn, pn->pn_cookie); 2034 if (vp->v_type == VFIFO) 2035 fifo_printinfo(vp); 2036 lockmgr_printinfo(&vp->v_lock); 2037 2038 /* userspace portion */ 2039 if (EXISTSOP(pmp, PRINT)) { 2040 PUFFS_MSG_ALLOC(vn, print); 2041 puffs_msg_setinfo(park_print, PUFFSOP_VN, 2042 PUFFS_VN_PRINT, VPTOPNC(vp)); 2043 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_print, vp->v_data, 2044 NULL, error); 2045 PUFFS_MSG_RELEASE(print); 2046 } 2047 2048 return 0; 2049 } 2050 2051 int 2052 puffs_vnop_pathconf(void *v) 2053 { 2054 struct vop_pathconf_args /* { 2055 const struct vnodeop_desc *a_desc; 2056 struct vnode *a_vp; 2057 int a_name; 2058 register_t *a_retval; 2059 } */ *ap = v; 2060 PUFFS_MSG_VARS(vn, pathconf); 2061 struct vnode *vp = ap->a_vp; 2062 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2063 int error; 2064 2065 PUFFS_MSG_ALLOC(vn, pathconf); 2066 pathconf_msg->pvnr_name = ap->a_name; 2067 puffs_msg_setinfo(park_pathconf, PUFFSOP_VN, 2068 PUFFS_VN_PATHCONF, VPTOPNC(vp)); 2069 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_pathconf, vp->v_data, NULL, error); 2070 error = checkerr(pmp, error, __func__); 2071 if (!error) 2072 *ap->a_retval = pathconf_msg->pvnr_retval; 2073 PUFFS_MSG_RELEASE(pathconf); 2074 2075 return error; 2076 } 2077 2078 int 2079 puffs_vnop_advlock(void *v) 2080 { 2081 struct vop_advlock_args /* { 2082 const struct vnodeop_desc *a_desc; 2083 struct vnode *a_vp; 2084 void *a_id; 2085 int a_op; 2086 struct flock *a_fl; 2087 int a_flags; 2088 } */ *ap = v; 2089 PUFFS_MSG_VARS(vn, advlock); 2090 struct vnode *vp = ap->a_vp; 2091 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2092 int error; 2093 2094 PUFFS_MSG_ALLOC(vn, advlock); 2095 error = copyin(ap->a_fl, &advlock_msg->pvnr_fl, sizeof(struct flock)); 2096 if (error) 2097 goto out; 2098 advlock_msg->pvnr_id = ap->a_id; 2099 advlock_msg->pvnr_op = ap->a_op; 2100 advlock_msg->pvnr_flags = ap->a_flags; 2101 puffs_msg_setinfo(park_advlock, PUFFSOP_VN, 2102 PUFFS_VN_ADVLOCK, VPTOPNC(vp)); 2103 2104 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_advlock, vp->v_data, NULL, error); 2105 error = checkerr(pmp, error, __func__); 2106 2107 out: 2108 PUFFS_MSG_RELEASE(advlock); 2109 return error; 2110 } 2111 2112 #define BIOASYNC(bp) (bp->b_flags & B_ASYNC) 2113 2114 /* 2115 * This maps itself to PUFFS_VN_READ/WRITE for data transfer. 2116 */ 2117 int 2118 puffs_vnop_strategy(void *v) 2119 { 2120 struct vop_strategy_args /* { 2121 const struct vnodeop_desc *a_desc; 2122 struct vnode *a_vp; 2123 struct buf *a_bp; 2124 } */ *ap = v; 2125 PUFFS_MSG_VARS(vn, rw); 2126 struct vnode *vp = ap->a_vp; 2127 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2128 struct puffs_node *pn; 2129 struct buf *bp; 2130 size_t argsize; 2131 size_t tomove, moved; 2132 int error, dofaf, dobiodone; 2133 2134 pmp = MPTOPUFFSMP(vp->v_mount); 2135 bp = ap->a_bp; 2136 error = 0; 2137 dofaf = 0; 2138 pn = VPTOPP(vp); 2139 park_rw = NULL; /* explicit */ 2140 dobiodone = 1; 2141 2142 if ((BUF_ISREAD(bp) && !EXISTSOP(pmp, READ)) 2143 || (BUF_ISWRITE(bp) && !EXISTSOP(pmp, WRITE))) 2144 ERROUT(EOPNOTSUPP); 2145 2146 #ifdef DIAGNOSTIC 2147 if (bp->b_bcount > pmp->pmp_msg_maxsize - PUFFS_MSGSTRUCT_MAX) 2148 panic("puffs_strategy: wildly inappropriate buf bcount %d", 2149 bp->b_bcount); 2150 #endif 2151 2152 /* 2153 * See explanation for the necessity of a FAF in puffs_fsync. 2154 * 2155 * Also, do FAF in case we're suspending. 2156 * See puffs_vfsops.c:pageflush() 2157 */ 2158 if (BUF_ISWRITE(bp)) { 2159 mutex_enter(&vp->v_interlock); 2160 if (vp->v_iflag & VI_XLOCK) 2161 dofaf = 1; 2162 if (pn->pn_stat & PNODE_SUSPEND) 2163 dofaf = 1; 2164 mutex_exit(&vp->v_interlock); 2165 } 2166 2167 #ifdef DIAGNOSTIC 2168 if (curlwp == uvm.pagedaemon_lwp) 2169 KASSERT(dofaf || BIOASYNC(bp)); 2170 #endif 2171 2172 /* allocate transport structure */ 2173 tomove = PUFFS_TOMOVE(bp->b_bcount, pmp); 2174 argsize = sizeof(struct puffs_vnmsg_rw); 2175 error = puffs_msgmem_alloc(argsize + tomove, &park_rw, 2176 (void *)&rw_msg, dofaf ? 0 : 1); 2177 if (error) 2178 goto out; 2179 RWARGS(rw_msg, 0, tomove, bp->b_blkno << DEV_BSHIFT, FSCRED); 2180 2181 /* 2x2 cases: read/write, faf/nofaf */ 2182 if (BUF_ISREAD(bp)) { 2183 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2184 PUFFS_VN_READ, VPTOPNC(vp)); 2185 puffs_msg_setdelta(park_rw, tomove); 2186 if (BIOASYNC(bp)) { 2187 puffs_msg_setcall(park_rw, 2188 puffs_parkdone_asyncbioread, bp); 2189 puffs_msg_enqueue(pmp, park_rw); 2190 dobiodone = 0; 2191 } else { 2192 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, 2193 NULL, error); 2194 error = checkerr(pmp, error, __func__); 2195 if (error) 2196 goto out; 2197 2198 if (rw_msg->pvnr_resid > tomove) { 2199 puffs_senderr(pmp, PUFFS_ERR_READ, 2200 E2BIG, "resid grew", VPTOPNC(vp)); 2201 ERROUT(EPROTO); 2202 } 2203 2204 moved = tomove - rw_msg->pvnr_resid; 2205 2206 (void)memcpy(bp->b_data, rw_msg->pvnr_data, moved); 2207 bp->b_resid = bp->b_bcount - moved; 2208 } 2209 } else { 2210 puffs_msg_setinfo(park_rw, PUFFSOP_VN, 2211 PUFFS_VN_WRITE, VPTOPNC(vp)); 2212 /* 2213 * make pages read-only before we write them if we want 2214 * write caching info 2215 */ 2216 if (PUFFS_WCACHEINFO(pmp)) { 2217 struct uvm_object *uobj = &vp->v_uobj; 2218 int npages = (bp->b_bcount + PAGE_SIZE-1) >> PAGE_SHIFT; 2219 struct vm_page *vmp; 2220 int i; 2221 2222 for (i = 0; i < npages; i++) { 2223 vmp= uvm_pageratop((vaddr_t)bp->b_data 2224 + (i << PAGE_SHIFT)); 2225 DPRINTF(("puffs_strategy: write-protecting " 2226 "vp %p page %p, offset %" PRId64"\n", 2227 vp, vmp, vmp->offset)); 2228 mutex_enter(&uobj->vmobjlock); 2229 vmp->flags |= PG_RDONLY; 2230 pmap_page_protect(vmp, VM_PROT_READ); 2231 mutex_exit(&uobj->vmobjlock); 2232 } 2233 } 2234 2235 (void)memcpy(&rw_msg->pvnr_data, bp->b_data, tomove); 2236 if (dofaf) { 2237 puffs_msg_setfaf(park_rw); 2238 } else if (BIOASYNC(bp)) { 2239 puffs_msg_setcall(park_rw, 2240 puffs_parkdone_asyncbiowrite, bp); 2241 dobiodone = 0; 2242 } 2243 2244 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_rw, vp->v_data, NULL, error); 2245 2246 if (dobiodone == 0) 2247 goto out; 2248 2249 /* 2250 * XXXXXXXX: wrong, but kernel can't survive strategy 2251 * failure currently. Here, have one more X: X. 2252 */ 2253 if (error != ENOMEM) 2254 error = 0; 2255 2256 error = checkerr(pmp, error, __func__); 2257 if (error) 2258 goto out; 2259 2260 if (rw_msg->pvnr_resid > tomove) { 2261 puffs_senderr(pmp, PUFFS_ERR_WRITE, 2262 E2BIG, "resid grew", VPTOPNC(vp)); 2263 ERROUT(EPROTO); 2264 } 2265 2266 /* 2267 * FAF moved everything. Frankly, we don't 2268 * really have a choice. 2269 */ 2270 if (dofaf && error == 0) 2271 moved = tomove; 2272 else 2273 moved = tomove - rw_msg->pvnr_resid; 2274 2275 bp->b_resid = bp->b_bcount - moved; 2276 if (bp->b_resid != 0) { 2277 ERROUT(EIO); 2278 } 2279 } 2280 2281 out: 2282 if (park_rw) 2283 puffs_msgmem_release(park_rw); 2284 2285 if (error) 2286 bp->b_error = error; 2287 2288 if (error || dobiodone) 2289 biodone(bp); 2290 2291 return error; 2292 } 2293 2294 int 2295 puffs_vnop_mmap(void *v) 2296 { 2297 struct vop_mmap_args /* { 2298 const struct vnodeop_desc *a_desc; 2299 struct vnode *a_vp; 2300 vm_prot_t a_prot; 2301 kauth_cred_t a_cred; 2302 } */ *ap = v; 2303 PUFFS_MSG_VARS(vn, mmap); 2304 struct vnode *vp = ap->a_vp; 2305 struct puffs_mount *pmp = MPTOPUFFSMP(vp->v_mount); 2306 int error; 2307 2308 if (!PUFFS_USE_PAGECACHE(pmp)) 2309 return genfs_eopnotsupp(v); 2310 2311 if (EXISTSOP(pmp, MMAP)) { 2312 PUFFS_MSG_ALLOC(vn, mmap); 2313 mmap_msg->pvnr_prot = ap->a_prot; 2314 puffs_credcvt(&mmap_msg->pvnr_cred, ap->a_cred); 2315 puffs_msg_setinfo(park_mmap, PUFFSOP_VN, 2316 PUFFS_VN_MMAP, VPTOPNC(vp)); 2317 2318 PUFFS_MSG_ENQUEUEWAIT2(pmp, park_mmap, vp->v_data, NULL, error); 2319 error = checkerr(pmp, error, __func__); 2320 PUFFS_MSG_RELEASE(mmap); 2321 } else { 2322 error = genfs_mmap(v); 2323 } 2324 2325 return error; 2326 } 2327 2328 2329 /* 2330 * The rest don't get a free trip to userspace and back, they 2331 * have to stay within the kernel. 2332 */ 2333 2334 /* 2335 * bmap doesn't really make any sense for puffs, so just 1:1 map it. 2336 * well, maybe somehow, somewhere, some day .... 2337 */ 2338 int 2339 puffs_vnop_bmap(void *v) 2340 { 2341 struct vop_bmap_args /* { 2342 const struct vnodeop_desc *a_desc; 2343 struct vnode *a_vp; 2344 daddr_t a_bn; 2345 struct vnode **a_vpp; 2346 daddr_t *a_bnp; 2347 int *a_runp; 2348 } */ *ap = v; 2349 struct puffs_mount *pmp; 2350 2351 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2352 2353 if (ap->a_vpp) 2354 *ap->a_vpp = ap->a_vp; 2355 if (ap->a_bnp) 2356 *ap->a_bnp = ap->a_bn; 2357 if (ap->a_runp) 2358 *ap->a_runp 2359 = (PUFFS_TOMOVE(pmp->pmp_msg_maxsize, pmp)>>DEV_BSHIFT) - 1; 2360 2361 return 0; 2362 } 2363 2364 /* 2365 * Handle getpages faults in puffs. We let genfs_getpages() do most 2366 * of the dirty work, but we come in this route to do accounting tasks. 2367 * If the user server has specified functions for cache notifications 2368 * about reads and/or writes, we record which type of operation we got, 2369 * for which page range, and proceed to issue a FAF notification to the 2370 * server about it. 2371 */ 2372 int 2373 puffs_vnop_getpages(void *v) 2374 { 2375 struct vop_getpages_args /* { 2376 const struct vnodeop_desc *a_desc; 2377 struct vnode *a_vp; 2378 voff_t a_offset; 2379 struct vm_page **a_m; 2380 int *a_count; 2381 int a_centeridx; 2382 vm_prot_t a_access_type; 2383 int a_advice; 2384 int a_flags; 2385 } */ *ap = v; 2386 struct puffs_mount *pmp; 2387 struct puffs_node *pn; 2388 struct vnode *vp; 2389 struct vm_page **pgs; 2390 struct puffs_cacheinfo *pcinfo = NULL; 2391 struct puffs_cacherun *pcrun; 2392 void *parkmem = NULL; 2393 size_t runsizes; 2394 int i, npages, si, streakon; 2395 int error, locked, write; 2396 2397 pmp = MPTOPUFFSMP(ap->a_vp->v_mount); 2398 npages = *ap->a_count; 2399 pgs = ap->a_m; 2400 vp = ap->a_vp; 2401 pn = vp->v_data; 2402 locked = (ap->a_flags & PGO_LOCKED) != 0; 2403 write = (ap->a_access_type & VM_PROT_WRITE) != 0; 2404 2405 /* ccg xnaht - gets Wuninitialized wrong */ 2406 pcrun = NULL; 2407 runsizes = 0; 2408 2409 /* 2410 * Check that we aren't trying to fault in pages which our file 2411 * server doesn't know about. This happens if we extend a file by 2412 * skipping some pages and later try to fault in pages which 2413 * are between pn_serversize and vp_size. This check optimizes 2414 * away the common case where a file is being extended. 2415 */ 2416 if (ap->a_offset >= pn->pn_serversize && ap->a_offset < vp->v_size) { 2417 struct vattr va; 2418 2419 /* try again later when we can block */ 2420 if (locked) 2421 ERROUT(EBUSY); 2422 2423 mutex_exit(&vp->v_interlock); 2424 vattr_null(&va); 2425 va.va_size = vp->v_size; 2426 error = dosetattr(vp, &va, FSCRED, 0); 2427 if (error) 2428 ERROUT(error); 2429 mutex_enter(&vp->v_interlock); 2430 } 2431 2432 if (write && PUFFS_WCACHEINFO(pmp)) { 2433 #ifdef notnowjohn 2434 /* allocate worst-case memory */ 2435 runsizes = ((npages / 2) + 1) * sizeof(struct puffs_cacherun); 2436 pcinfo = kmem_zalloc(sizeof_puffs_cacheinfo) + runsize, 2437 locked ? KM_NOSLEEP : KM_SLEEP); 2438 2439 /* 2440 * can't block if we're locked and can't mess up caching 2441 * information for fs server. so come back later, please 2442 */ 2443 if (pcinfo == NULL) 2444 ERROUT(ENOMEM); 2445 2446 parkmem = puffs_park_alloc(locked == 0); 2447 if (parkmem == NULL) 2448 ERROUT(ENOMEM); 2449 2450 pcrun = pcinfo->pcache_runs; 2451 #else 2452 (void)parkmem; 2453 #endif 2454 } 2455 2456 error = genfs_getpages(v); 2457 if (error) 2458 goto out; 2459 2460 if (PUFFS_WCACHEINFO(pmp) == 0) 2461 goto out; 2462 2463 /* 2464 * Let's see whose fault it was and inform the user server of 2465 * possibly read/written pages. Map pages from read faults 2466 * strictly read-only, since otherwise we might miss info on 2467 * when the page is actually write-faulted to. 2468 */ 2469 if (!locked) 2470 mutex_enter(&vp->v_uobj.vmobjlock); 2471 for (i = 0, si = 0, streakon = 0; i < npages; i++) { 2472 if (pgs[i] == NULL || pgs[i] == PGO_DONTCARE) { 2473 if (streakon && write) { 2474 streakon = 0; 2475 pcrun[si].pcache_runend 2476 = trunc_page(pgs[i]->offset) + PAGE_MASK; 2477 si++; 2478 } 2479 continue; 2480 } 2481 if (streakon == 0 && write) { 2482 streakon = 1; 2483 pcrun[si].pcache_runstart = pgs[i]->offset; 2484 } 2485 2486 if (!write) 2487 pgs[i]->flags |= PG_RDONLY; 2488 } 2489 /* was the last page part of our streak? */ 2490 if (streakon) { 2491 pcrun[si].pcache_runend 2492 = trunc_page(pgs[i-1]->offset) + PAGE_MASK; 2493 si++; 2494 } 2495 if (!locked) 2496 mutex_exit(&vp->v_uobj.vmobjlock); 2497 2498 KASSERT(si <= (npages / 2) + 1); 2499 2500 #ifdef notnowjohn 2501 /* send results to userspace */ 2502 if (write) 2503 puffs_cacheop(pmp, parkmem, pcinfo, 2504 sizeof(struct puffs_cacheinfo) + runsizes, VPTOPNC(vp)); 2505 #endif 2506 2507 out: 2508 if (error) { 2509 if (pcinfo != NULL) 2510 kmem_free(pcinfo, 2511 sizeof(struct puffs_cacheinfo) + runsizes); 2512 #ifdef notnowjohn 2513 if (parkmem != NULL) 2514 puffs_park_release(parkmem, 1); 2515 #endif 2516 } 2517 2518 return error; 2519 } 2520 2521 int 2522 puffs_vnop_lock(void *v) 2523 { 2524 struct vop_lock_args /* { 2525 struct vnode *a_vp; 2526 int a_flags; 2527 }*/ *ap = v; 2528 struct vnode *vp = ap->a_vp; 2529 struct mount *mp = vp->v_mount; 2530 2531 #if 0 2532 DPRINTF(("puffs_lock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2533 #endif 2534 2535 /* 2536 * XXX: this avoids deadlocking when we're suspending. 2537 * e.g. some ops holding the vnode lock might be blocked for 2538 * the vfs transaction lock so we'd deadlock. 2539 * 2540 * Now once again this is skating on the thin ice of modern life, 2541 * since we are breaking the consistency guarantee provided 2542 * _to the user server_ by vnode locking. Hopefully this will 2543 * get fixed soon enough by getting rid of the dependency on 2544 * vnode locks alltogether. 2545 */ 2546 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2547 if (ap->a_flags & LK_INTERLOCK) 2548 mutex_exit(&vp->v_interlock); 2549 return 0; 2550 } 2551 2552 return lockmgr(&vp->v_lock, ap->a_flags, &vp->v_interlock); 2553 } 2554 2555 int 2556 puffs_vnop_unlock(void *v) 2557 { 2558 struct vop_unlock_args /* { 2559 struct vnode *a_vp; 2560 int a_flags; 2561 } */ *ap = v; 2562 struct vnode *vp = ap->a_vp; 2563 struct mount *mp = vp->v_mount; 2564 2565 #if 0 2566 DPRINTF(("puffs_unlock: lock %p, args 0x%x\n", vp, ap->a_flags)); 2567 #endif 2568 2569 /* XXX: see puffs_lock() */ 2570 if (fstrans_is_owner(mp) && fstrans_getstate(mp) == FSTRANS_SUSPENDING){ 2571 if (ap->a_flags & LK_INTERLOCK) 2572 mutex_exit(&vp->v_interlock); 2573 return 0; 2574 } 2575 2576 return lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock); 2577 } 2578 2579 int 2580 puffs_vnop_islocked(void *v) 2581 { 2582 struct vop_islocked_args *ap = v; 2583 int rv; 2584 2585 rv = lockstatus(&ap->a_vp->v_lock); 2586 return rv; 2587 } 2588 2589 2590 /* 2591 * spec & fifo. These call the miscfs spec and fifo vectors, but issue 2592 * FAF update information for the puffs node first. 2593 */ 2594 int 2595 puffs_vnop_spec_read(void *v) 2596 { 2597 struct vop_read_args /* { 2598 const struct vnodeop_desc *a_desc; 2599 struct vnode *a_vp; 2600 struct uio *a_uio; 2601 int a_ioflag; 2602 kauth_cred_t a_cred; 2603 } */ *ap = v; 2604 2605 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2606 return VOCALL(spec_vnodeop_p, VOFFSET(vop_read), v); 2607 } 2608 2609 int 2610 puffs_vnop_spec_write(void *v) 2611 { 2612 struct vop_write_args /* { 2613 const struct vnodeop_desc *a_desc; 2614 struct vnode *a_vp; 2615 struct uio *a_uio; 2616 int a_ioflag; 2617 kauth_cred_t a_cred; 2618 }*/ *ap = v; 2619 2620 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2621 return VOCALL(spec_vnodeop_p, VOFFSET(vop_write), v); 2622 } 2623 2624 int 2625 puffs_vnop_fifo_read(void *v) 2626 { 2627 struct vop_read_args /* { 2628 const struct vnodeop_desc *a_desc; 2629 struct vnode *a_vp; 2630 struct uio *a_uio; 2631 int a_ioflag; 2632 kauth_cred_t a_cred; 2633 } */ *ap = v; 2634 2635 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEATIME, 0); 2636 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), v); 2637 } 2638 2639 int 2640 puffs_vnop_fifo_write(void *v) 2641 { 2642 struct vop_write_args /* { 2643 const struct vnodeop_desc *a_desc; 2644 struct vnode *a_vp; 2645 struct uio *a_uio; 2646 int a_ioflag; 2647 kauth_cred_t a_cred; 2648 }*/ *ap = v; 2649 2650 puffs_updatenode(VPTOPP(ap->a_vp), PUFFS_UPDATEMTIME, 0); 2651 return VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), v); 2652 } 2653
Indexes created Tue Sep 30 11:09:46 GMT 2025