rumpfs.c revision 1.102
1 /* $NetBSD: rumpfs.c,v 1.102 2011/09/27 13:53:26 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2009, 2010, 2011 Antti Kantee. All Rights Reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: rumpfs.c,v 1.102 2011/09/27 13:53:26 christos Exp $"); 30 31 #include <sys/param.h> 32 #include <sys/atomic.h> 33 #include <sys/buf.h> 34 #include <sys/dirent.h> 35 #include <sys/errno.h> 36 #include <sys/filedesc.h> 37 #include <sys/fcntl.h> 38 #include <sys/kauth.h> 39 #include <sys/malloc.h> 40 #include <sys/module.h> 41 #include <sys/mount.h> 42 #include <sys/namei.h> 43 #include <sys/lock.h> 44 #include <sys/lockf.h> 45 #include <sys/queue.h> 46 #include <sys/stat.h> 47 #include <sys/syscallargs.h> 48 #include <sys/vnode.h> 49 #include <sys/unistd.h> 50 51 #include <miscfs/fifofs/fifo.h> 52 #include <miscfs/specfs/specdev.h> 53 #include <miscfs/genfs/genfs.h> 54 #include <miscfs/genfs/genfs_node.h> 55 56 #include <uvm/uvm_extern.h> 57 58 #include <rump/rumpuser.h> 59 60 #include "rump_private.h" 61 #include "rump_vfs_private.h" 62 63 static int rump_vop_lookup(void *); 64 static int rump_vop_getattr(void *); 65 static int rump_vop_setattr(void *); 66 static int rump_vop_mkdir(void *); 67 static int rump_vop_rmdir(void *); 68 static int rump_vop_remove(void *); 69 static int rump_vop_mknod(void *); 70 static int rump_vop_create(void *); 71 static int rump_vop_inactive(void *); 72 static int rump_vop_reclaim(void *); 73 static int rump_vop_success(void *); 74 static int rump_vop_readdir(void *); 75 static int rump_vop_spec(void *); 76 static int rump_vop_read(void *); 77 static int rump_vop_write(void *); 78 static int rump_vop_open(void *); 79 static int rump_vop_symlink(void *); 80 static int rump_vop_readlink(void *); 81 static int rump_vop_whiteout(void *); 82 static int rump_vop_pathconf(void *); 83 static int rump_vop_bmap(void *); 84 static int rump_vop_strategy(void *); 85 static int rump_vop_advlock(void *); 86 static int rump_vop_access(void *); 87 88 int (**fifo_vnodeop_p)(void *); 89 const struct vnodeopv_entry_desc fifo_vnodeop_entries[] = { 90 { &vop_default_desc, vn_default_error }, 91 { NULL, NULL } 92 }; 93 const struct vnodeopv_desc fifo_vnodeop_opv_desc = 94 { &fifo_vnodeop_p, fifo_vnodeop_entries }; 95 96 int (**rump_vnodeop_p)(void *); 97 const struct vnodeopv_entry_desc rump_vnodeop_entries[] = { 98 { &vop_default_desc, vn_default_error }, 99 { &vop_lookup_desc, rump_vop_lookup }, 100 { &vop_getattr_desc, rump_vop_getattr }, 101 { &vop_setattr_desc, rump_vop_setattr }, 102 { &vop_mkdir_desc, rump_vop_mkdir }, 103 { &vop_rmdir_desc, rump_vop_rmdir }, 104 { &vop_remove_desc, rump_vop_remove }, 105 { &vop_mknod_desc, rump_vop_mknod }, 106 { &vop_create_desc, rump_vop_create }, 107 { &vop_symlink_desc, rump_vop_symlink }, 108 { &vop_readlink_desc, rump_vop_readlink }, 109 { &vop_access_desc, rump_vop_access }, 110 { &vop_readdir_desc, rump_vop_readdir }, 111 { &vop_read_desc, rump_vop_read }, 112 { &vop_write_desc, rump_vop_write }, 113 { &vop_open_desc, rump_vop_open }, 114 { &vop_close_desc, genfs_nullop }, 115 { &vop_seek_desc, genfs_seek }, 116 { &vop_getpages_desc, genfs_getpages }, 117 { &vop_putpages_desc, genfs_putpages }, 118 { &vop_whiteout_desc, rump_vop_whiteout }, 119 { &vop_fsync_desc, rump_vop_success }, 120 { &vop_lock_desc, genfs_lock }, 121 { &vop_unlock_desc, genfs_unlock }, 122 { &vop_islocked_desc, genfs_islocked }, 123 { &vop_inactive_desc, rump_vop_inactive }, 124 { &vop_reclaim_desc, rump_vop_reclaim }, 125 { &vop_link_desc, genfs_eopnotsupp }, 126 { &vop_pathconf_desc, rump_vop_pathconf }, 127 { &vop_bmap_desc, rump_vop_bmap }, 128 { &vop_strategy_desc, rump_vop_strategy }, 129 { &vop_advlock_desc, rump_vop_advlock }, 130 { NULL, NULL } 131 }; 132 const struct vnodeopv_desc rump_vnodeop_opv_desc = 133 { &rump_vnodeop_p, rump_vnodeop_entries }; 134 135 int (**rump_specop_p)(void *); 136 const struct vnodeopv_entry_desc rump_specop_entries[] = { 137 { &vop_default_desc, rump_vop_spec }, 138 { NULL, NULL } 139 }; 140 const struct vnodeopv_desc rump_specop_opv_desc = 141 { &rump_specop_p, rump_specop_entries }; 142 143 const struct vnodeopv_desc * const rump_opv_descs[] = { 144 &rump_vnodeop_opv_desc, 145 &rump_specop_opv_desc, 146 NULL 147 }; 148 149 #define RUMPFS_WHITEOUT ((void *)-1) 150 #define RDENT_ISWHITEOUT(rdp) (rdp->rd_node == RUMPFS_WHITEOUT) 151 struct rumpfs_dent { 152 char *rd_name; 153 int rd_namelen; 154 struct rumpfs_node *rd_node; 155 156 LIST_ENTRY(rumpfs_dent) rd_entries; 157 }; 158 159 struct genfs_ops rumpfs_genfsops = { 160 .gop_size = genfs_size, 161 .gop_write = genfs_gop_write, 162 163 /* optional */ 164 .gop_alloc = NULL, 165 .gop_markupdate = NULL, 166 }; 167 168 struct rumpfs_node { 169 struct genfs_node rn_gn; 170 struct vattr rn_va; 171 struct vnode *rn_vp; 172 char *rn_hostpath; 173 int rn_flags; 174 struct lockf *rn_lockf; 175 176 union { 177 struct { /* VREG */ 178 int readfd; 179 int writefd; 180 uint64_t offset; 181 } reg; 182 struct { 183 void *data; 184 size_t dlen; 185 } reg_noet; 186 struct { /* VDIR */ 187 LIST_HEAD(, rumpfs_dent) dents; 188 struct rumpfs_node *parent; 189 int flags; 190 } dir; 191 struct { 192 char *target; 193 size_t len; 194 } link; 195 } rn_u; 196 }; 197 #define rn_readfd rn_u.reg.readfd 198 #define rn_writefd rn_u.reg.writefd 199 #define rn_offset rn_u.reg.offset 200 #define rn_data rn_u.reg_noet.data 201 #define rn_dlen rn_u.reg_noet.dlen 202 #define rn_dir rn_u.dir.dents 203 #define rn_parent rn_u.dir.parent 204 #define rn_linktarg rn_u.link.target 205 #define rn_linklen rn_u.link.len 206 207 #define RUMPNODE_CANRECLAIM 0x01 208 #define RUMPNODE_DIR_ET 0x02 209 #define RUMPNODE_DIR_ETSUBS 0x04 210 #define RUMPNODE_ET_PHONE_HOST 0x10 211 212 struct rumpfs_mount { 213 struct vnode *rfsmp_rvp; 214 }; 215 216 #define INO_WHITEOUT 1 217 static int lastino = 2; 218 static kmutex_t reclock; 219 220 static void freedir(struct rumpfs_node *, struct componentname *); 221 static struct rumpfs_node *makeprivate(enum vtype, dev_t, off_t, bool); 222 223 /* 224 * Extra Terrestrial stuff. We map a given key (pathname) to a file on 225 * the host FS. ET phones home only from the root node of rumpfs. 226 * 227 * When an etfs node is removed, a vnode potentially behind it is not 228 * immediately recycled. 229 */ 230 231 struct etfs { 232 char et_key[MAXPATHLEN]; 233 size_t et_keylen; 234 bool et_prefixkey; 235 bool et_removing; 236 devminor_t et_blkmin; 237 238 LIST_ENTRY(etfs) et_entries; 239 240 struct rumpfs_node *et_rn; 241 }; 242 static kmutex_t etfs_lock; 243 static LIST_HEAD(, etfs) etfs_list = LIST_HEAD_INITIALIZER(etfs_list); 244 245 static enum vtype 246 ettype_to_vtype(enum rump_etfs_type et) 247 { 248 enum vtype vt; 249 250 switch (et) { 251 case RUMP_ETFS_REG: 252 vt = VREG; 253 break; 254 case RUMP_ETFS_BLK: 255 vt = VBLK; 256 break; 257 case RUMP_ETFS_CHR: 258 vt = VCHR; 259 break; 260 case RUMP_ETFS_DIR: 261 vt = VDIR; 262 break; 263 case RUMP_ETFS_DIR_SUBDIRS: 264 vt = VDIR; 265 break; 266 default: 267 panic("invalid et type: %d", et); 268 } 269 270 return vt; 271 } 272 273 static enum vtype 274 hft_to_vtype(int hft) 275 { 276 enum vtype vt; 277 278 switch (hft) { 279 case RUMPUSER_FT_OTHER: 280 vt = VNON; 281 break; 282 case RUMPUSER_FT_DIR: 283 vt = VDIR; 284 break; 285 case RUMPUSER_FT_REG: 286 vt = VREG; 287 break; 288 case RUMPUSER_FT_BLK: 289 vt = VBLK; 290 break; 291 case RUMPUSER_FT_CHR: 292 vt = VCHR; 293 break; 294 default: 295 vt = VNON; 296 break; 297 } 298 299 return vt; 300 } 301 302 static bool 303 etfs_find(const char *key, struct etfs **etp, bool forceprefix) 304 { 305 struct etfs *et; 306 size_t keylen = strlen(key); 307 308 KASSERT(mutex_owned(&etfs_lock)); 309 310 LIST_FOREACH(et, &etfs_list, et_entries) { 311 if ((keylen == et->et_keylen || et->et_prefixkey || forceprefix) 312 && strncmp(key, et->et_key, et->et_keylen) == 0) { 313 if (etp) 314 *etp = et; 315 return true; 316 } 317 } 318 319 return false; 320 } 321 322 #define REGDIR(ftype) \ 323 ((ftype) == RUMP_ETFS_DIR || (ftype) == RUMP_ETFS_DIR_SUBDIRS) 324 static int 325 doregister(const char *key, const char *hostpath, 326 enum rump_etfs_type ftype, uint64_t begin, uint64_t size) 327 { 328 char buf[9]; 329 struct etfs *et; 330 struct rumpfs_node *rn; 331 uint64_t fsize; 332 dev_t rdev = NODEV; 333 devminor_t dmin = -1; 334 int hft, error; 335 336 if (key[0] != '/') { 337 return EINVAL; 338 } 339 while (key[0] == '/') { 340 key++; 341 } 342 343 if (rumpuser_getfileinfo(hostpath, &fsize, &hft, &error)) 344 return error; 345 346 /* etfs directory requires a directory on the host */ 347 if (REGDIR(ftype)) { 348 if (hft != RUMPUSER_FT_DIR) 349 return ENOTDIR; 350 if (begin != 0) 351 return EISDIR; 352 if (size != RUMP_ETFS_SIZE_ENDOFF) 353 return EISDIR; 354 size = fsize; 355 } else { 356 if (begin > fsize) 357 return EINVAL; 358 if (size == RUMP_ETFS_SIZE_ENDOFF) 359 size = fsize - begin; 360 if (begin + size > fsize) 361 return EINVAL; 362 } 363 364 if (ftype == RUMP_ETFS_BLK || ftype == RUMP_ETFS_CHR) { 365 error = rumpblk_register(hostpath, &dmin, begin, size); 366 if (error != 0) { 367 return error; 368 } 369 rdev = makedev(RUMPBLK_DEVMAJOR, dmin); 370 } 371 372 et = kmem_alloc(sizeof(*et), KM_SLEEP); 373 strcpy(et->et_key, key); 374 et->et_keylen = strlen(et->et_key); 375 et->et_rn = rn = makeprivate(ettype_to_vtype(ftype), rdev, size, true); 376 et->et_removing = false; 377 et->et_blkmin = dmin; 378 379 rn->rn_flags |= RUMPNODE_ET_PHONE_HOST; 380 381 if (ftype == RUMP_ETFS_REG || REGDIR(ftype) || et->et_blkmin != -1) { 382 size_t len = strlen(hostpath)+1; 383 384 rn->rn_hostpath = malloc(len, M_TEMP, M_WAITOK | M_ZERO); 385 memcpy(rn->rn_hostpath, hostpath, len); 386 rn->rn_offset = begin; 387 } 388 389 if (REGDIR(ftype)) { 390 rn->rn_flags |= RUMPNODE_DIR_ET; 391 et->et_prefixkey = true; 392 } else { 393 et->et_prefixkey = false; 394 } 395 396 if (ftype == RUMP_ETFS_DIR_SUBDIRS) 397 rn->rn_flags |= RUMPNODE_DIR_ETSUBS; 398 399 mutex_enter(&etfs_lock); 400 if (etfs_find(key, NULL, REGDIR(ftype))) { 401 mutex_exit(&etfs_lock); 402 if (et->et_blkmin != -1) 403 rumpblk_deregister(hostpath); 404 if (et->et_rn->rn_hostpath != NULL) 405 free(et->et_rn->rn_hostpath, M_TEMP); 406 kmem_free(et->et_rn, sizeof(*et->et_rn)); 407 kmem_free(et, sizeof(*et)); 408 return EEXIST; 409 } 410 LIST_INSERT_HEAD(&etfs_list, et, et_entries); 411 mutex_exit(&etfs_lock); 412 413 if (ftype == RUMP_ETFS_BLK) { 414 format_bytes(buf, sizeof(buf), size); 415 aprint_verbose("/%s: hostpath %s (%s)\n", key, hostpath, buf); 416 } 417 418 return 0; 419 } 420 #undef REGDIR 421 422 int 423 rump_etfs_register(const char *key, const char *hostpath, 424 enum rump_etfs_type ftype) 425 { 426 427 return doregister(key, hostpath, ftype, 0, RUMP_ETFS_SIZE_ENDOFF); 428 } 429 430 int 431 rump_etfs_register_withsize(const char *key, const char *hostpath, 432 enum rump_etfs_type ftype, uint64_t begin, uint64_t size) 433 { 434 435 return doregister(key, hostpath, ftype, begin, size); 436 } 437 438 /* remove etfs mapping. caller's responsibility to make sure it's not in use */ 439 int 440 rump_etfs_remove(const char *key) 441 { 442 struct etfs *et; 443 size_t keylen; 444 int rv; 445 446 if (key[0] != '/') { 447 return EINVAL; 448 } 449 while (key[0] == '/') { 450 key++; 451 } 452 453 keylen = strlen(key); 454 455 mutex_enter(&etfs_lock); 456 LIST_FOREACH(et, &etfs_list, et_entries) { 457 if (keylen == et->et_keylen && strcmp(et->et_key, key) == 0) { 458 if (et->et_removing) 459 et = NULL; 460 else 461 et->et_removing = true; 462 break; 463 } 464 } 465 mutex_exit(&etfs_lock); 466 if (!et) 467 return ENOENT; 468 469 /* 470 * ok, we know what we want to remove and have signalled there 471 * actually are men at work. first, unregister from rumpblk 472 */ 473 if (et->et_blkmin != -1) { 474 rv = rumpblk_deregister(et->et_rn->rn_hostpath); 475 } else { 476 rv = 0; 477 } 478 KASSERT(rv == 0); 479 480 /* then do the actual removal */ 481 mutex_enter(&etfs_lock); 482 LIST_REMOVE(et, et_entries); 483 mutex_exit(&etfs_lock); 484 485 /* node is unreachable, safe to nuke all device copies */ 486 if (et->et_blkmin != -1) { 487 vdevgone(RUMPBLK_DEVMAJOR, et->et_blkmin, et->et_blkmin, VBLK); 488 } else { 489 struct vnode *vp; 490 491 mutex_enter(&reclock); 492 if ((vp = et->et_rn->rn_vp) != NULL) 493 mutex_enter(vp->v_interlock); 494 mutex_exit(&reclock); 495 if (vp && vget(vp, 0) == 0) 496 vgone(vp); 497 } 498 499 if (et->et_rn->rn_hostpath != NULL) 500 free(et->et_rn->rn_hostpath, M_TEMP); 501 kmem_free(et->et_rn, sizeof(*et->et_rn)); 502 kmem_free(et, sizeof(*et)); 503 504 return 0; 505 } 506 507 /* 508 * rumpfs 509 */ 510 511 static struct rumpfs_node * 512 makeprivate(enum vtype vt, dev_t rdev, off_t size, bool et) 513 { 514 struct rumpfs_node *rn; 515 struct vattr *va; 516 struct timespec ts; 517 518 rn = kmem_zalloc(sizeof(*rn), KM_SLEEP); 519 520 switch (vt) { 521 case VDIR: 522 LIST_INIT(&rn->rn_dir); 523 break; 524 case VREG: 525 if (et) { 526 rn->rn_readfd = -1; 527 rn->rn_writefd = -1; 528 } 529 break; 530 default: 531 break; 532 } 533 534 nanotime(&ts); 535 536 va = &rn->rn_va; 537 va->va_type = vt; 538 va->va_mode = 0755; 539 if (vt == VDIR) 540 va->va_nlink = 2; 541 else 542 va->va_nlink = 1; 543 va->va_uid = 0; 544 va->va_gid = 0; 545 va->va_fsid = 546 va->va_fileid = atomic_inc_uint_nv(&lastino); 547 va->va_size = size; 548 va->va_blocksize = 512; 549 va->va_atime = ts; 550 va->va_mtime = ts; 551 va->va_ctime = ts; 552 va->va_birthtime = ts; 553 va->va_gen = 0; 554 va->va_flags = 0; 555 va->va_rdev = rdev; 556 va->va_bytes = 512; 557 va->va_filerev = 0; 558 va->va_vaflags = 0; 559 560 return rn; 561 } 562 563 static int 564 makevnode(struct mount *mp, struct rumpfs_node *rn, struct vnode **vpp) 565 { 566 struct vnode *vp; 567 int (**vpops)(void *); 568 struct vattr *va = &rn->rn_va; 569 int rv; 570 571 KASSERT(!mutex_owned(&reclock)); 572 573 if (va->va_type == VCHR || va->va_type == VBLK) { 574 vpops = rump_specop_p; 575 } else { 576 vpops = rump_vnodeop_p; 577 } 578 579 rv = getnewvnode(VT_RUMP, mp, vpops, NULL, &vp); 580 if (rv) 581 return rv; 582 583 vp->v_size = vp->v_writesize = va->va_size; 584 vp->v_type = va->va_type; 585 586 if (vpops == rump_specop_p) { 587 spec_node_init(vp, va->va_rdev); 588 } 589 vp->v_data = rn; 590 591 genfs_node_init(vp, &rumpfs_genfsops); 592 vn_lock(vp, LK_RETRY | LK_EXCLUSIVE); 593 mutex_enter(&reclock); 594 rn->rn_vp = vp; 595 mutex_exit(&reclock); 596 597 *vpp = vp; 598 599 return 0; 600 } 601 602 603 static void 604 makedir(struct rumpfs_node *rnd, 605 struct componentname *cnp, struct rumpfs_node *rn) 606 { 607 struct rumpfs_dent *rdent; 608 609 rdent = kmem_alloc(sizeof(*rdent), KM_SLEEP); 610 rdent->rd_name = kmem_alloc(cnp->cn_namelen+1, KM_SLEEP); 611 rdent->rd_node = rn; 612 strlcpy(rdent->rd_name, cnp->cn_nameptr, cnp->cn_namelen+1); 613 rdent->rd_namelen = strlen(rdent->rd_name); 614 615 if ((cnp->cn_flags & ISWHITEOUT) != 0) { 616 KASSERT((cnp->cn_flags & DOWHITEOUT) == 0); 617 freedir(rnd, cnp); 618 } 619 LIST_INSERT_HEAD(&rnd->rn_dir, rdent, rd_entries); 620 } 621 622 static void 623 freedir(struct rumpfs_node *rnd, struct componentname *cnp) 624 { 625 struct rumpfs_dent *rd = NULL; 626 627 LIST_FOREACH(rd, &rnd->rn_dir, rd_entries) { 628 if (rd->rd_namelen == cnp->cn_namelen && 629 strncmp(rd->rd_name, cnp->cn_nameptr, 630 cnp->cn_namelen) == 0) 631 break; 632 } 633 if (rd == NULL) 634 panic("could not find directory entry: %s", cnp->cn_nameptr); 635 636 if (cnp->cn_flags & DOWHITEOUT) { 637 rd->rd_node = RUMPFS_WHITEOUT; 638 } else { 639 LIST_REMOVE(rd, rd_entries); 640 kmem_free(rd->rd_name, rd->rd_namelen+1); 641 kmem_free(rd, sizeof(*rd)); 642 } 643 } 644 645 /* 646 * Simple lookup for rump file systems. 647 * 648 * uhm, this is twisted. C F C C, hope of C C F C looming 649 */ 650 static int 651 rump_vop_lookup(void *v) 652 { 653 struct vop_lookup_args /* { 654 struct vnode *a_dvp; 655 struct vnode **a_vpp; 656 struct componentname *a_cnp; 657 }; */ *ap = v; 658 struct componentname *cnp = ap->a_cnp; 659 struct vnode *dvp = ap->a_dvp; 660 struct vnode **vpp = ap->a_vpp; 661 struct vnode *vp; 662 struct rumpfs_node *rnd = dvp->v_data, *rn; 663 struct rumpfs_dent *rd = NULL; 664 struct etfs *et; 665 bool dotdot = (cnp->cn_flags & ISDOTDOT) != 0; 666 int rv = 0; 667 const char *cp; 668 669 *vpp = NULL; 670 671 if ((cnp->cn_flags & ISLASTCN) 672 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 673 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 674 return EROFS; 675 676 /* check for dot, return directly if the case */ 677 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 678 vref(dvp); 679 *vpp = dvp; 680 return 0; 681 } 682 683 /* we don't do rename */ 684 if (!(((cnp->cn_flags & ISLASTCN) == 0) || (cnp->cn_nameiop != RENAME))) 685 return EOPNOTSUPP; 686 687 /* check for etfs */ 688 if (dvp == rootvnode && 689 (cnp->cn_nameiop == LOOKUP || cnp->cn_nameiop == CREATE)) { 690 bool found; 691 mutex_enter(&etfs_lock); 692 found = etfs_find(cnp->cn_nameptr, &et, false); 693 mutex_exit(&etfs_lock); 694 695 if (found) { 696 rn = et->et_rn; 697 cnp->cn_consume += et->et_keylen - cnp->cn_namelen; 698 /* 699 * consume trailing slashes if any and clear 700 * REQUIREDIR if we consumed the full path. 701 */ 702 cp = &cnp->cn_nameptr[cnp->cn_namelen]; 703 cp += cnp->cn_consume; 704 KASSERT(*cp == '\0' || *cp == '/'); 705 if (*cp == '\0' && rn->rn_va.va_type != VDIR) 706 cnp->cn_flags &= ~REQUIREDIR; 707 while (*cp++ == '/') 708 cnp->cn_consume++; 709 goto getvnode; 710 } 711 } 712 713 if (rnd->rn_flags & RUMPNODE_DIR_ET) { 714 uint64_t fsize; 715 char *newpath; 716 size_t newpathlen; 717 int hft, error; 718 719 if (dotdot) 720 return EOPNOTSUPP; 721 722 newpathlen = strlen(rnd->rn_hostpath) + 1 + cnp->cn_namelen + 1; 723 newpath = malloc(newpathlen, M_TEMP, M_WAITOK); 724 725 strlcpy(newpath, rnd->rn_hostpath, newpathlen); 726 strlcat(newpath, "/", newpathlen); 727 strlcat(newpath, cnp->cn_nameptr, newpathlen); 728 729 if (rumpuser_getfileinfo(newpath, &fsize, &hft, &error)) { 730 free(newpath, M_TEMP); 731 return error; 732 } 733 734 /* allow only dirs and regular files */ 735 if (hft != RUMPUSER_FT_REG && hft != RUMPUSER_FT_DIR) { 736 free(newpath, M_TEMP); 737 return ENOENT; 738 } 739 740 rn = makeprivate(hft_to_vtype(hft), NODEV, fsize, true); 741 rn->rn_flags |= RUMPNODE_CANRECLAIM; 742 if (rnd->rn_flags & RUMPNODE_DIR_ETSUBS) { 743 rn->rn_flags |= RUMPNODE_DIR_ET | RUMPNODE_DIR_ETSUBS; 744 rn->rn_flags |= RUMPNODE_ET_PHONE_HOST; 745 } 746 rn->rn_hostpath = newpath; 747 748 goto getvnode; 749 } else { 750 if (dotdot) { 751 if ((rn = rnd->rn_parent) != NULL) 752 goto getvnode; 753 } else { 754 LIST_FOREACH(rd, &rnd->rn_dir, rd_entries) { 755 if (rd->rd_namelen == cnp->cn_namelen && 756 strncmp(rd->rd_name, cnp->cn_nameptr, 757 cnp->cn_namelen) == 0) 758 break; 759 } 760 } 761 } 762 763 if (!rd && ((cnp->cn_flags & ISLASTCN) == 0||cnp->cn_nameiop != CREATE)) 764 return ENOENT; 765 766 if (!rd && (cnp->cn_flags & ISLASTCN) && cnp->cn_nameiop == CREATE) { 767 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 768 return EROFS; 769 return EJUSTRETURN; 770 } 771 772 if (RDENT_ISWHITEOUT(rd)) { 773 cnp->cn_flags |= ISWHITEOUT; 774 if ((cnp->cn_flags & ISLASTCN) && cnp->cn_nameiop == CREATE) 775 return EJUSTRETURN; 776 return ENOENT; 777 } 778 779 rn = rd->rd_node; 780 781 getvnode: 782 KASSERT(rn); 783 if (dotdot) 784 VOP_UNLOCK(dvp); 785 mutex_enter(&reclock); 786 if ((vp = rn->rn_vp)) { 787 mutex_enter(vp->v_interlock); 788 mutex_exit(&reclock); 789 if (vget(vp, LK_EXCLUSIVE)) { 790 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 791 goto getvnode; 792 } 793 *vpp = vp; 794 } else { 795 mutex_exit(&reclock); 796 rv = makevnode(dvp->v_mount, rn, vpp); 797 } 798 if (dotdot) 799 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 800 801 return rv; 802 } 803 804 int 805 rump_vop_access(void *v) 806 { 807 struct vop_access_args /* { 808 const struct vnodeop_desc *a_desc; 809 struct vnode *a_vp; 810 int a_mode; 811 kauth_cred_t a_cred; 812 } */ *ap = v; 813 struct vnode *vp = ap->a_vp; 814 int mode = ap->a_mode; 815 816 if (mode & VWRITE) { 817 switch (vp->v_type) { 818 case VDIR: 819 case VLNK: 820 case VREG: 821 if ((vp->v_mount->mnt_flag & MNT_RDONLY)) 822 return EROFS; 823 break; 824 default: 825 break; 826 } 827 } 828 829 return 0; 830 } 831 832 static int 833 rump_vop_getattr(void *v) 834 { 835 struct vop_getattr_args /* { 836 struct vnode *a_vp; 837 struct vattr *a_vap; 838 kauth_cred_t a_cred; 839 } */ *ap = v; 840 struct vnode *vp = ap->a_vp; 841 struct rumpfs_node *rn = vp->v_data; 842 struct vattr *vap = ap->a_vap; 843 844 memcpy(vap, &rn->rn_va, sizeof(struct vattr)); 845 vap->va_size = vp->v_size; 846 return 0; 847 } 848 849 static int 850 rump_vop_setattr(void *v) 851 { 852 struct vop_getattr_args /* { 853 struct vnode *a_vp; 854 struct vattr *a_vap; 855 kauth_cred_t a_cred; 856 } */ *ap = v; 857 struct vnode *vp = ap->a_vp; 858 struct vattr *vap = ap->a_vap; 859 struct rumpfs_node *rn = vp->v_data; 860 861 #define SETIFVAL(a,t) if (vap->a != (t)VNOVAL) rn->rn_va.a = vap->a 862 SETIFVAL(va_mode, mode_t); 863 SETIFVAL(va_uid, uid_t); 864 SETIFVAL(va_gid, gid_t); 865 SETIFVAL(va_atime.tv_sec, time_t); 866 SETIFVAL(va_ctime.tv_sec, time_t); 867 SETIFVAL(va_mtime.tv_sec, time_t); 868 SETIFVAL(va_birthtime.tv_sec, time_t); 869 SETIFVAL(va_atime.tv_nsec, long); 870 SETIFVAL(va_ctime.tv_nsec, long); 871 SETIFVAL(va_mtime.tv_nsec, long); 872 SETIFVAL(va_birthtime.tv_nsec, long); 873 SETIFVAL(va_flags, u_long); 874 #undef SETIFVAL 875 876 if (vp->v_type == VREG && 877 vap->va_size != VSIZENOTSET && 878 vap->va_size != rn->rn_dlen) { 879 void *newdata; 880 size_t copylen, newlen; 881 882 newlen = vap->va_size; 883 newdata = rump_hypermalloc(newlen, 0, true, "rumpfs"); 884 885 copylen = MIN(rn->rn_dlen, newlen); 886 memset(newdata, 0, newlen); 887 memcpy(newdata, rn->rn_data, copylen); 888 rump_hyperfree(rn->rn_data, rn->rn_dlen); 889 890 rn->rn_data = newdata; 891 rn->rn_dlen = newlen; 892 uvm_vnp_setsize(vp, newlen); 893 } 894 return 0; 895 } 896 897 static int 898 rump_vop_mkdir(void *v) 899 { 900 struct vop_mkdir_args /* { 901 struct vnode *a_dvp; 902 struct vnode **a_vpp; 903 struct componentname *a_cnp; 904 struct vattr *a_vap; 905 }; */ *ap = v; 906 struct vnode *dvp = ap->a_dvp; 907 struct vnode **vpp = ap->a_vpp; 908 struct componentname *cnp = ap->a_cnp; 909 struct rumpfs_node *rnd = dvp->v_data, *rn; 910 int rv = 0; 911 912 rn = makeprivate(VDIR, NODEV, DEV_BSIZE, false); 913 if ((cnp->cn_flags & ISWHITEOUT) != 0) 914 rn->rn_va.va_flags |= UF_OPAQUE; 915 rn->rn_parent = rnd; 916 rv = makevnode(dvp->v_mount, rn, vpp); 917 if (rv) 918 goto out; 919 920 makedir(rnd, cnp, rn); 921 922 out: 923 vput(dvp); 924 return rv; 925 } 926 927 static int 928 rump_vop_rmdir(void *v) 929 { 930 struct vop_rmdir_args /* { 931 struct vnode *a_dvp; 932 struct vnode *a_vp; 933 struct componentname *a_cnp; 934 }; */ *ap = v; 935 struct vnode *dvp = ap->a_dvp; 936 struct vnode *vp = ap->a_vp; 937 struct componentname *cnp = ap->a_cnp; 938 struct rumpfs_node *rnd = dvp->v_data; 939 struct rumpfs_node *rn = vp->v_data; 940 struct rumpfs_dent *rd; 941 int rv = 0; 942 943 LIST_FOREACH(rd, &rn->rn_dir, rd_entries) { 944 if (rd->rd_node != RUMPFS_WHITEOUT) { 945 rv = ENOTEMPTY; 946 goto out; 947 } 948 } 949 while ((rd = LIST_FIRST(&rn->rn_dir)) != NULL) { 950 KASSERT(rd->rd_node == RUMPFS_WHITEOUT); 951 LIST_REMOVE(rd, rd_entries); 952 kmem_free(rd->rd_name, rd->rd_namelen+1); 953 kmem_free(rd, sizeof(*rd)); 954 } 955 956 freedir(rnd, cnp); 957 rn->rn_flags |= RUMPNODE_CANRECLAIM; 958 rn->rn_parent = NULL; 959 960 out: 961 vput(dvp); 962 vput(vp); 963 964 return rv; 965 } 966 967 static int 968 rump_vop_remove(void *v) 969 { 970 struct vop_rmdir_args /* { 971 struct vnode *a_dvp; 972 struct vnode *a_vp; 973 struct componentname *a_cnp; 974 }; */ *ap = v; 975 struct vnode *dvp = ap->a_dvp; 976 struct vnode *vp = ap->a_vp; 977 struct componentname *cnp = ap->a_cnp; 978 struct rumpfs_node *rnd = dvp->v_data; 979 struct rumpfs_node *rn = vp->v_data; 980 int rv = 0; 981 982 if (rn->rn_flags & RUMPNODE_ET_PHONE_HOST) 983 return EOPNOTSUPP; 984 985 if (vp->v_type == VREG) { 986 rump_hyperfree(rn->rn_data, rn->rn_dlen); 987 } 988 989 freedir(rnd, cnp); 990 rn->rn_flags |= RUMPNODE_CANRECLAIM; 991 992 vput(dvp); 993 vput(vp); 994 995 return rv; 996 } 997 998 static int 999 rump_vop_mknod(void *v) 1000 { 1001 struct vop_mknod_args /* { 1002 struct vnode *a_dvp; 1003 struct vnode **a_vpp; 1004 struct componentname *a_cnp; 1005 struct vattr *a_vap; 1006 }; */ *ap = v; 1007 struct vnode *dvp = ap->a_dvp; 1008 struct vnode **vpp = ap->a_vpp; 1009 struct componentname *cnp = ap->a_cnp; 1010 struct vattr *va = ap->a_vap; 1011 struct rumpfs_node *rnd = dvp->v_data, *rn; 1012 int rv; 1013 1014 rn = makeprivate(va->va_type, va->va_rdev, DEV_BSIZE, false); 1015 if ((cnp->cn_flags & ISWHITEOUT) != 0) 1016 rn->rn_va.va_flags |= UF_OPAQUE; 1017 rv = makevnode(dvp->v_mount, rn, vpp); 1018 if (rv) 1019 goto out; 1020 1021 makedir(rnd, cnp, rn); 1022 1023 out: 1024 vput(dvp); 1025 return rv; 1026 } 1027 1028 static int 1029 rump_vop_create(void *v) 1030 { 1031 struct vop_create_args /* { 1032 struct vnode *a_dvp; 1033 struct vnode **a_vpp; 1034 struct componentname *a_cnp; 1035 struct vattr *a_vap; 1036 }; */ *ap = v; 1037 struct vnode *dvp = ap->a_dvp; 1038 struct vnode **vpp = ap->a_vpp; 1039 struct componentname *cnp = ap->a_cnp; 1040 struct vattr *va = ap->a_vap; 1041 struct rumpfs_node *rnd = dvp->v_data, *rn; 1042 off_t newsize; 1043 int rv; 1044 1045 newsize = va->va_type == VSOCK ? DEV_BSIZE : 0; 1046 rn = makeprivate(va->va_type, NODEV, newsize, false); 1047 if ((cnp->cn_flags & ISWHITEOUT) != 0) 1048 rn->rn_va.va_flags |= UF_OPAQUE; 1049 rv = makevnode(dvp->v_mount, rn, vpp); 1050 if (rv) 1051 goto out; 1052 1053 makedir(rnd, cnp, rn); 1054 1055 out: 1056 vput(dvp); 1057 return rv; 1058 } 1059 1060 static int 1061 rump_vop_symlink(void *v) 1062 { 1063 struct vop_symlink_args /* { 1064 struct vnode *a_dvp; 1065 struct vnode **a_vpp; 1066 struct componentname *a_cnp; 1067 struct vattr *a_vap; 1068 char *a_target; 1069 }; */ *ap = v; 1070 struct vnode *dvp = ap->a_dvp; 1071 struct vnode **vpp = ap->a_vpp; 1072 struct componentname *cnp = ap->a_cnp; 1073 struct rumpfs_node *rnd = dvp->v_data, *rn; 1074 const char *target = ap->a_target; 1075 size_t linklen; 1076 int rv; 1077 1078 linklen = strlen(target); 1079 KASSERT(linklen < MAXPATHLEN); 1080 rn = makeprivate(VLNK, NODEV, linklen, false); 1081 if ((cnp->cn_flags & ISWHITEOUT) != 0) 1082 rn->rn_va.va_flags |= UF_OPAQUE; 1083 rv = makevnode(dvp->v_mount, rn, vpp); 1084 if (rv) 1085 goto out; 1086 1087 makedir(rnd, cnp, rn); 1088 1089 KASSERT(linklen < MAXPATHLEN); 1090 rn->rn_linktarg = PNBUF_GET(); 1091 rn->rn_linklen = linklen; 1092 strcpy(rn->rn_linktarg, target); 1093 1094 out: 1095 vput(dvp); 1096 return rv; 1097 } 1098 1099 static int 1100 rump_vop_readlink(void *v) 1101 { 1102 struct vop_readlink_args /* { 1103 struct vnode *a_vp; 1104 struct uio *a_uio; 1105 kauth_cred_t a_cred; 1106 }; */ *ap = v; 1107 struct vnode *vp = ap->a_vp; 1108 struct rumpfs_node *rn = vp->v_data; 1109 struct uio *uio = ap->a_uio; 1110 1111 return uiomove(rn->rn_linktarg, rn->rn_linklen, uio); 1112 } 1113 1114 static int 1115 rump_vop_whiteout(void *v) 1116 { 1117 struct vop_whiteout_args /* { 1118 struct vnode *a_dvp; 1119 struct componentname *a_cnp; 1120 int a_flags; 1121 } */ *ap = v; 1122 struct vnode *dvp = ap->a_dvp; 1123 struct rumpfs_node *rnd = dvp->v_data; 1124 struct componentname *cnp = ap->a_cnp; 1125 int flags = ap->a_flags; 1126 1127 switch (flags) { 1128 case LOOKUP: 1129 break; 1130 case CREATE: 1131 makedir(rnd, cnp, RUMPFS_WHITEOUT); 1132 break; 1133 case DELETE: 1134 cnp->cn_flags &= ~DOWHITEOUT; /* cargo culting never fails ? */ 1135 freedir(rnd, cnp); 1136 break; 1137 default: 1138 panic("unknown whiteout op %d", flags); 1139 } 1140 1141 return 0; 1142 } 1143 1144 static int 1145 rump_vop_open(void *v) 1146 { 1147 struct vop_open_args /* { 1148 struct vnode *a_vp; 1149 int a_mode; 1150 kauth_cred_t a_cred; 1151 } */ *ap = v; 1152 struct vnode *vp = ap->a_vp; 1153 struct rumpfs_node *rn = vp->v_data; 1154 int mode = ap->a_mode; 1155 int error = EINVAL; 1156 1157 if (vp->v_type != VREG || (rn->rn_flags & RUMPNODE_ET_PHONE_HOST) == 0) 1158 return 0; 1159 1160 if (mode & FREAD) { 1161 if (rn->rn_readfd != -1) 1162 return 0; 1163 rn->rn_readfd = rumpuser_open(rn->rn_hostpath, 1164 O_RDONLY, &error); 1165 } 1166 1167 if (mode & FWRITE) { 1168 if (rn->rn_writefd != -1) 1169 return 0; 1170 rn->rn_writefd = rumpuser_open(rn->rn_hostpath, 1171 O_WRONLY, &error); 1172 } 1173 1174 return error; 1175 } 1176 1177 /* simple readdir. event omits dotstuff and periods */ 1178 static int 1179 rump_vop_readdir(void *v) 1180 { 1181 struct vop_readdir_args /* { 1182 struct vnode *a_vp; 1183 struct uio *a_uio; 1184 kauth_cred_t a_cred; 1185 int *a_eofflag; 1186 off_t **a_cookies; 1187 int *a_ncookies; 1188 } */ *ap = v; 1189 struct vnode *vp = ap->a_vp; 1190 struct uio *uio = ap->a_uio; 1191 struct rumpfs_node *rnd = vp->v_data; 1192 struct rumpfs_dent *rdent; 1193 unsigned i; 1194 int rv = 0; 1195 1196 /* seek to current entry */ 1197 for (i = 0, rdent = LIST_FIRST(&rnd->rn_dir); 1198 (i < uio->uio_offset) && rdent; 1199 i++, rdent = LIST_NEXT(rdent, rd_entries)) 1200 continue; 1201 if (!rdent) 1202 goto out; 1203 1204 /* copy entries */ 1205 for (; rdent && uio->uio_resid > 0; 1206 rdent = LIST_NEXT(rdent, rd_entries), i++) { 1207 struct dirent dent; 1208 1209 strlcpy(dent.d_name, rdent->rd_name, sizeof(dent.d_name)); 1210 dent.d_namlen = strlen(dent.d_name); 1211 dent.d_reclen = _DIRENT_RECLEN(&dent, dent.d_namlen); 1212 1213 if (__predict_false(RDENT_ISWHITEOUT(rdent))) { 1214 dent.d_fileno = INO_WHITEOUT; 1215 dent.d_type = DT_WHT; 1216 } else { 1217 dent.d_fileno = rdent->rd_node->rn_va.va_fileid; 1218 dent.d_type = vtype2dt(rdent->rd_node->rn_va.va_type); 1219 } 1220 1221 if (uio->uio_resid < dent.d_reclen) { 1222 i--; 1223 break; 1224 } 1225 1226 rv = uiomove(&dent, dent.d_reclen, uio); 1227 if (rv) { 1228 i--; 1229 break; 1230 } 1231 } 1232 1233 out: 1234 if (ap->a_cookies) { 1235 *ap->a_ncookies = 0; 1236 *ap->a_cookies = NULL; 1237 } 1238 if (rdent) 1239 *ap->a_eofflag = 0; 1240 else 1241 *ap->a_eofflag = 1; 1242 uio->uio_offset = i; 1243 1244 return rv; 1245 } 1246 1247 static int 1248 etread(struct rumpfs_node *rn, struct uio *uio) 1249 { 1250 uint8_t *buf; 1251 size_t bufsize; 1252 ssize_t n; 1253 int error = 0; 1254 1255 bufsize = uio->uio_resid; 1256 if (bufsize == 0) 1257 return 0; 1258 buf = kmem_alloc(bufsize, KM_SLEEP); 1259 if ((n = rumpuser_pread(rn->rn_readfd, buf, bufsize, 1260 uio->uio_offset + rn->rn_offset, &error)) == -1) 1261 goto out; 1262 KASSERT(n <= bufsize); 1263 error = uiomove(buf, n, uio); 1264 1265 out: 1266 kmem_free(buf, bufsize); 1267 return error; 1268 1269 } 1270 1271 static int 1272 rump_vop_read(void *v) 1273 { 1274 struct vop_read_args /* { 1275 struct vnode *a_vp; 1276 struct uio *a_uio; 1277 int ioflags a_ioflag; 1278 kauth_cred_t a_cred; 1279 }; */ *ap = v; 1280 struct vnode *vp = ap->a_vp; 1281 struct rumpfs_node *rn = vp->v_data; 1282 struct uio *uio = ap->a_uio; 1283 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1284 off_t chunk; 1285 int error = 0; 1286 1287 /* et op? */ 1288 if (rn->rn_flags & RUMPNODE_ET_PHONE_HOST) 1289 return etread(rn, uio); 1290 1291 /* otherwise, it's off to ubc with us */ 1292 while (uio->uio_resid > 0) { 1293 chunk = MIN(uio->uio_resid, (off_t)rn->rn_dlen-uio->uio_offset); 1294 if (chunk == 0) 1295 break; 1296 error = ubc_uiomove(&vp->v_uobj, uio, chunk, advice, 1297 UBC_READ | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 1298 if (error) 1299 break; 1300 } 1301 1302 return error; 1303 } 1304 1305 static int 1306 etwrite(struct rumpfs_node *rn, struct uio *uio) 1307 { 1308 uint8_t *buf; 1309 size_t bufsize; 1310 ssize_t n; 1311 int error = 0; 1312 1313 bufsize = uio->uio_resid; 1314 if (bufsize == 0) 1315 return 0; 1316 buf = kmem_alloc(bufsize, KM_SLEEP); 1317 error = uiomove(buf, bufsize, uio); 1318 if (error) 1319 goto out; 1320 KASSERT(uio->uio_resid == 0); 1321 n = rumpuser_pwrite(rn->rn_writefd, buf, bufsize, 1322 (uio->uio_offset-bufsize) + rn->rn_offset, &error); 1323 if (n >= 0) { 1324 KASSERT(n <= bufsize); 1325 uio->uio_resid = bufsize - n; 1326 } 1327 1328 out: 1329 kmem_free(buf, bufsize); 1330 return error; 1331 } 1332 1333 static int 1334 rump_vop_write(void *v) 1335 { 1336 struct vop_read_args /* { 1337 struct vnode *a_vp; 1338 struct uio *a_uio; 1339 int ioflags a_ioflag; 1340 kauth_cred_t a_cred; 1341 }; */ *ap = v; 1342 struct vnode *vp = ap->a_vp; 1343 struct rumpfs_node *rn = vp->v_data; 1344 struct uio *uio = ap->a_uio; 1345 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1346 void *olddata; 1347 size_t oldlen, newlen; 1348 off_t chunk; 1349 int error = 0; 1350 bool allocd = false; 1351 1352 if (ap->a_ioflag & IO_APPEND) 1353 uio->uio_offset = vp->v_size; 1354 1355 /* consult et? */ 1356 if (rn->rn_flags & RUMPNODE_ET_PHONE_HOST) 1357 return etwrite(rn, uio); 1358 1359 /* 1360 * Otherwise, it's a case of ubcmove. 1361 */ 1362 1363 /* 1364 * First, make sure we have enough storage. 1365 * 1366 * No, you don't need to tell me it's not very efficient. 1367 * No, it doesn't really support sparse files, just fakes it. 1368 */ 1369 newlen = uio->uio_offset + uio->uio_resid; 1370 oldlen = 0; /* XXXgcc */ 1371 olddata = NULL; 1372 if (rn->rn_dlen < newlen) { 1373 oldlen = rn->rn_dlen; 1374 olddata = rn->rn_data; 1375 1376 rn->rn_data = rump_hypermalloc(newlen, 0, true, "rumpfs"); 1377 rn->rn_dlen = newlen; 1378 memset(rn->rn_data, 0, newlen); 1379 memcpy(rn->rn_data, olddata, oldlen); 1380 allocd = true; 1381 uvm_vnp_setsize(vp, newlen); 1382 } 1383 1384 /* ok, we have enough stooorage. write */ 1385 while (uio->uio_resid > 0) { 1386 chunk = MIN(uio->uio_resid, (off_t)rn->rn_dlen-uio->uio_offset); 1387 if (chunk == 0) 1388 break; 1389 error = ubc_uiomove(&vp->v_uobj, uio, chunk, advice, 1390 UBC_WRITE | UBC_PARTIALOK | UBC_UNMAP_FLAG(vp)); 1391 if (error) 1392 break; 1393 } 1394 1395 if (allocd) { 1396 if (error) { 1397 rump_hyperfree(rn->rn_data, newlen); 1398 rn->rn_data = olddata; 1399 rn->rn_dlen = oldlen; 1400 uvm_vnp_setsize(vp, oldlen); 1401 } else { 1402 rump_hyperfree(olddata, oldlen); 1403 } 1404 } 1405 1406 return error; 1407 } 1408 1409 static int 1410 rump_vop_bmap(void *v) 1411 { 1412 struct vop_bmap_args /* { 1413 struct vnode *a_vp; 1414 daddr_t a_bn; 1415 struct vnode **a_vpp; 1416 daddr_t *a_bnp; 1417 int *a_runp; 1418 } */ *ap = v; 1419 1420 /* 1:1 mapping */ 1421 if (ap->a_vpp) 1422 *ap->a_vpp = ap->a_vp; 1423 if (ap->a_bnp) 1424 *ap->a_bnp = ap->a_bn; 1425 if (ap->a_runp) 1426 *ap->a_runp = 16; 1427 1428 return 0; 1429 } 1430 1431 static int 1432 rump_vop_strategy(void *v) 1433 { 1434 struct vop_strategy_args /* { 1435 struct vnode *a_vp; 1436 struct buf *a_bp; 1437 } */ *ap = v; 1438 struct vnode *vp = ap->a_vp; 1439 struct rumpfs_node *rn = vp->v_data; 1440 struct buf *bp = ap->a_bp; 1441 off_t copylen, copyoff; 1442 int error; 1443 1444 if (vp->v_type != VREG || rn->rn_flags & RUMPNODE_ET_PHONE_HOST) { 1445 error = EINVAL; 1446 goto out; 1447 } 1448 1449 copyoff = bp->b_blkno << DEV_BSHIFT; 1450 copylen = MIN(rn->rn_dlen - copyoff, bp->b_bcount); 1451 if (BUF_ISWRITE(bp)) { 1452 memcpy((uint8_t *)rn->rn_data + copyoff, bp->b_data, copylen); 1453 } else { 1454 memset((uint8_t*)bp->b_data + copylen, 0, bp->b_bcount-copylen); 1455 memcpy(bp->b_data, (uint8_t *)rn->rn_data + copyoff, copylen); 1456 } 1457 bp->b_resid = 0; 1458 error = 0; 1459 1460 out: 1461 bp->b_error = error; 1462 biodone(bp); 1463 return 0; 1464 } 1465 1466 static int 1467 rump_vop_pathconf(void *v) 1468 { 1469 struct vop_pathconf_args /* { 1470 struct vnode *a_vp; 1471 int a_name; 1472 register_t *a_retval; 1473 }; */ *ap = v; 1474 int name = ap->a_name; 1475 register_t *retval = ap->a_retval; 1476 1477 switch (name) { 1478 case _PC_LINK_MAX: 1479 *retval = LINK_MAX; 1480 return 0; 1481 case _PC_NAME_MAX: 1482 *retval = RUMPFS_MAXNAMLEN; 1483 return 0; 1484 case _PC_PATH_MAX: 1485 *retval = PATH_MAX; 1486 return 0; 1487 case _PC_PIPE_BUF: 1488 *retval = PIPE_BUF; 1489 return 0; 1490 case _PC_CHOWN_RESTRICTED: 1491 *retval = 1; 1492 return 0; 1493 case _PC_NO_TRUNC: 1494 *retval = 1; 1495 return 0; 1496 case _PC_SYNC_IO: 1497 *retval = 1; 1498 return 0; 1499 case _PC_FILESIZEBITS: 1500 *retval = 43; /* this one goes to 11 */ 1501 return 0; 1502 case _PC_SYMLINK_MAX: 1503 *retval =_MAXPATHLEN; 1504 return 0; 1505 case _PC_2_SYMLINKS: 1506 *retval = 1; 1507 return 0; 1508 default: 1509 return EINVAL; 1510 } 1511 } 1512 1513 static int 1514 rump_vop_success(void *v) 1515 { 1516 1517 return 0; 1518 } 1519 1520 static int 1521 rump_vop_inactive(void *v) 1522 { 1523 struct vop_inactive_args /* { 1524 struct vnode *a_vp; 1525 bool *a_recycle; 1526 } */ *ap = v; 1527 struct vnode *vp = ap->a_vp; 1528 struct rumpfs_node *rn = vp->v_data; 1529 int error; 1530 1531 if (rn->rn_flags & RUMPNODE_ET_PHONE_HOST && vp->v_type == VREG) { 1532 if (rn->rn_readfd != -1) { 1533 rumpuser_close(rn->rn_readfd, &error); 1534 rn->rn_readfd = -1; 1535 } 1536 if (rn->rn_writefd != -1) { 1537 rumpuser_close(rn->rn_writefd, &error); 1538 rn->rn_writefd = -1; 1539 } 1540 } 1541 *ap->a_recycle = (rn->rn_flags & RUMPNODE_CANRECLAIM) ? true : false; 1542 1543 VOP_UNLOCK(vp); 1544 return 0; 1545 } 1546 1547 static int 1548 rump_vop_reclaim(void *v) 1549 { 1550 struct vop_reclaim_args /* { 1551 struct vnode *a_vp; 1552 } */ *ap = v; 1553 struct vnode *vp = ap->a_vp; 1554 struct rumpfs_node *rn = vp->v_data; 1555 1556 mutex_enter(&reclock); 1557 rn->rn_vp = NULL; 1558 mutex_exit(&reclock); 1559 genfs_node_destroy(vp); 1560 vp->v_data = NULL; 1561 1562 if (rn->rn_flags & RUMPNODE_CANRECLAIM) { 1563 if (vp->v_type == VLNK) 1564 PNBUF_PUT(rn->rn_linktarg); 1565 if (rn->rn_hostpath) 1566 free(rn->rn_hostpath, M_TEMP); 1567 kmem_free(rn, sizeof(*rn)); 1568 } 1569 1570 return 0; 1571 } 1572 1573 static int 1574 rump_vop_spec(void *v) 1575 { 1576 struct vop_generic_args *ap = v; 1577 int (**opvec)(void *); 1578 1579 switch (ap->a_desc->vdesc_offset) { 1580 case VOP_ACCESS_DESCOFFSET: 1581 case VOP_GETATTR_DESCOFFSET: 1582 case VOP_SETATTR_DESCOFFSET: 1583 case VOP_LOCK_DESCOFFSET: 1584 case VOP_UNLOCK_DESCOFFSET: 1585 case VOP_ISLOCKED_DESCOFFSET: 1586 case VOP_RECLAIM_DESCOFFSET: 1587 opvec = rump_vnodeop_p; 1588 break; 1589 default: 1590 opvec = spec_vnodeop_p; 1591 break; 1592 } 1593 1594 return VOCALL(opvec, ap->a_desc->vdesc_offset, v); 1595 } 1596 1597 static int 1598 rump_vop_advlock(void *v) 1599 { 1600 struct vop_advlock_args /* { 1601 const struct vnodeop_desc *a_desc; 1602 struct vnode *a_vp; 1603 void *a_id; 1604 int a_op; 1605 struct flock *a_fl; 1606 int a_flags; 1607 } */ *ap = v; 1608 struct vnode *vp = ap->a_vp; 1609 struct rumpfs_node *rn = vp->v_data; 1610 1611 return lf_advlock(ap, &rn->rn_lockf, vp->v_size); 1612 } 1613 1614 /* 1615 * Begin vfs-level stuff 1616 */ 1617 1618 VFS_PROTOS(rumpfs); 1619 struct vfsops rumpfs_vfsops = { 1620 .vfs_name = MOUNT_RUMPFS, 1621 .vfs_min_mount_data = 0, 1622 .vfs_mount = rumpfs_mount, 1623 .vfs_start = (void *)nullop, 1624 .vfs_unmount = rumpfs_unmount, 1625 .vfs_root = rumpfs_root, 1626 .vfs_quotactl = (void *)eopnotsupp, 1627 .vfs_statvfs = genfs_statvfs, 1628 .vfs_sync = (void *)nullop, 1629 .vfs_vget = rumpfs_vget, 1630 .vfs_fhtovp = (void *)eopnotsupp, 1631 .vfs_vptofh = (void *)eopnotsupp, 1632 .vfs_init = rumpfs_init, 1633 .vfs_reinit = NULL, 1634 .vfs_done = rumpfs_done, 1635 .vfs_mountroot = rumpfs_mountroot, 1636 .vfs_snapshot = (void *)eopnotsupp, 1637 .vfs_extattrctl = (void *)eopnotsupp, 1638 .vfs_suspendctl = (void *)eopnotsupp, 1639 .vfs_renamelock_enter = genfs_renamelock_enter, 1640 .vfs_renamelock_exit = genfs_renamelock_exit, 1641 .vfs_opv_descs = rump_opv_descs, 1642 /* vfs_refcount */ 1643 /* vfs_list */ 1644 }; 1645 1646 static int 1647 rumpfs_mountfs(struct mount *mp) 1648 { 1649 struct rumpfs_mount *rfsmp; 1650 struct rumpfs_node *rn; 1651 int error; 1652 1653 rfsmp = kmem_alloc(sizeof(*rfsmp), KM_SLEEP); 1654 1655 rn = makeprivate(VDIR, NODEV, DEV_BSIZE, false); 1656 rn->rn_parent = rn; 1657 if ((error = makevnode(mp, rn, &rfsmp->rfsmp_rvp)) != 0) 1658 return error; 1659 1660 rfsmp->rfsmp_rvp->v_vflag |= VV_ROOT; 1661 VOP_UNLOCK(rfsmp->rfsmp_rvp); 1662 1663 mp->mnt_data = rfsmp; 1664 mp->mnt_stat.f_namemax = RUMPFS_MAXNAMLEN; 1665 mp->mnt_stat.f_iosize = 512; 1666 mp->mnt_flag |= MNT_LOCAL; 1667 mp->mnt_iflag |= IMNT_MPSAFE | IMNT_CAN_RWTORO; 1668 mp->mnt_fs_bshift = DEV_BSHIFT; 1669 vfs_getnewfsid(mp); 1670 1671 return 0; 1672 } 1673 1674 int 1675 rumpfs_mount(struct mount *mp, const char *mntpath, void *arg, size_t *alen) 1676 { 1677 int error; 1678 1679 if (mp->mnt_flag & MNT_UPDATE) { 1680 return 0; 1681 } 1682 1683 error = set_statvfs_info(mntpath, UIO_USERSPACE, "rumpfs", UIO_SYSSPACE, 1684 mp->mnt_op->vfs_name, mp, curlwp); 1685 if (error) 1686 return error; 1687 1688 return rumpfs_mountfs(mp); 1689 } 1690 1691 int 1692 rumpfs_unmount(struct mount *mp, int mntflags) 1693 { 1694 struct rumpfs_mount *rfsmp = mp->mnt_data; 1695 int flags = 0, error; 1696 1697 if (panicstr || mntflags & MNT_FORCE) 1698 flags |= FORCECLOSE; 1699 1700 if ((error = vflush(mp, rfsmp->rfsmp_rvp, flags)) != 0) 1701 return error; 1702 vgone(rfsmp->rfsmp_rvp); /* XXX */ 1703 1704 kmem_free(rfsmp, sizeof(*rfsmp)); 1705 1706 return 0; 1707 } 1708 1709 int 1710 rumpfs_root(struct mount *mp, struct vnode **vpp) 1711 { 1712 struct rumpfs_mount *rfsmp = mp->mnt_data; 1713 1714 vref(rfsmp->rfsmp_rvp); 1715 vn_lock(rfsmp->rfsmp_rvp, LK_EXCLUSIVE | LK_RETRY); 1716 *vpp = rfsmp->rfsmp_rvp; 1717 return 0; 1718 } 1719 1720 int 1721 rumpfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1722 { 1723 1724 return EOPNOTSUPP; 1725 } 1726 1727 void 1728 rumpfs_init() 1729 { 1730 1731 CTASSERT(RUMP_ETFS_SIZE_ENDOFF == RUMPBLK_SIZENOTSET); 1732 1733 mutex_init(&reclock, MUTEX_DEFAULT, IPL_NONE); 1734 mutex_init(&etfs_lock, MUTEX_DEFAULT, IPL_NONE); 1735 } 1736 1737 void 1738 rumpfs_done() 1739 { 1740 1741 mutex_destroy(&reclock); 1742 mutex_destroy(&etfs_lock); 1743 } 1744 1745 int 1746 rumpfs_mountroot() 1747 { 1748 struct mount *mp; 1749 int error; 1750 1751 if ((error = vfs_rootmountalloc(MOUNT_RUMPFS, "rootdev", &mp)) != 0) { 1752 vrele(rootvp); 1753 return error; 1754 } 1755 1756 if ((error = rumpfs_mountfs(mp)) != 0) 1757 panic("mounting rootfs failed: %d", error); 1758 1759 mutex_enter(&mountlist_lock); 1760 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 1761 mutex_exit(&mountlist_lock); 1762 1763 error = set_statvfs_info("/", UIO_SYSSPACE, "rumpfs", UIO_SYSSPACE, 1764 mp->mnt_op->vfs_name, mp, curlwp); 1765 if (error) 1766 panic("set_statvfs_info failed for rootfs: %d", error); 1767 1768 mp->mnt_flag &= ~MNT_RDONLY; 1769 vfs_unbusy(mp, false, NULL); 1770 1771 return 0; 1772 } 1773
Indexes created Tue Sep 30 20:09:53 GMT 2025