rumpfs.c revision 1.90
1 /* $NetBSD: rumpfs.c,v 1.90 2011/02/02 14:41:55 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2009, 2010 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 1.90 2011/02/02 14:41:55 pooka 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 struct rumpfs_node *makeprivate(enum vtype, dev_t, off_t, bool); 221 222 /* 223 * Extra Terrestrial stuff. We map a given key (pathname) to a file on 224 * the host FS. ET phones home only from the root node of rumpfs. 225 * 226 * When an etfs node is removed, a vnode potentially behind it is not 227 * immediately recycled. 228 */ 229 230 struct etfs { 231 char et_key[MAXPATHLEN]; 232 size_t et_keylen; 233 bool et_prefixkey; 234 bool et_removing; 235 devminor_t et_blkmin; 236 237 LIST_ENTRY(etfs) et_entries; 238 239 struct rumpfs_node *et_rn; 240 }; 241 static kmutex_t etfs_lock; 242 static LIST_HEAD(, etfs) etfs_list = LIST_HEAD_INITIALIZER(etfs_list); 243 244 static enum vtype 245 ettype_to_vtype(enum rump_etfs_type et) 246 { 247 enum vtype vt; 248 249 switch (et) { 250 case RUMP_ETFS_REG: 251 vt = VREG; 252 break; 253 case RUMP_ETFS_BLK: 254 vt = VBLK; 255 break; 256 case RUMP_ETFS_CHR: 257 vt = VCHR; 258 break; 259 case RUMP_ETFS_DIR: 260 vt = VDIR; 261 break; 262 case RUMP_ETFS_DIR_SUBDIRS: 263 vt = VDIR; 264 break; 265 default: 266 panic("invalid et type: %d", et); 267 } 268 269 return vt; 270 } 271 272 static enum vtype 273 hft_to_vtype(int hft) 274 { 275 enum vtype vt; 276 277 switch (hft) { 278 case RUMPUSER_FT_OTHER: 279 vt = VNON; 280 break; 281 case RUMPUSER_FT_DIR: 282 vt = VDIR; 283 break; 284 case RUMPUSER_FT_REG: 285 vt = VREG; 286 break; 287 case RUMPUSER_FT_BLK: 288 vt = VBLK; 289 break; 290 case RUMPUSER_FT_CHR: 291 vt = VCHR; 292 break; 293 default: 294 vt = VNON; 295 break; 296 } 297 298 return vt; 299 } 300 301 static bool 302 etfs_find(const char *key, struct etfs **etp, bool forceprefix) 303 { 304 struct etfs *et; 305 size_t keylen = strlen(key); 306 307 KASSERT(mutex_owned(&etfs_lock)); 308 309 LIST_FOREACH(et, &etfs_list, et_entries) { 310 if ((keylen == et->et_keylen || et->et_prefixkey || forceprefix) 311 && strncmp(key, et->et_key, et->et_keylen) == 0) { 312 if (etp) 313 *etp = et; 314 return true; 315 } 316 } 317 318 return false; 319 } 320 321 #define REGDIR(ftype) \ 322 ((ftype) == RUMP_ETFS_DIR || (ftype) == RUMP_ETFS_DIR_SUBDIRS) 323 static int 324 doregister(const char *key, const char *hostpath, 325 enum rump_etfs_type ftype, uint64_t begin, uint64_t size) 326 { 327 char buf[9]; 328 struct etfs *et; 329 struct rumpfs_node *rn; 330 uint64_t fsize; 331 dev_t rdev = NODEV; 332 devminor_t dmin = -1; 333 int hft, error; 334 335 if (key[0] != '/') { 336 return EINVAL; 337 } 338 while (key[0] == '/') { 339 key++; 340 } 341 342 if (rumpuser_getfileinfo(hostpath, &fsize, &hft, &error)) 343 return error; 344 345 /* etfs directory requires a directory on the host */ 346 if (REGDIR(ftype)) { 347 if (hft != RUMPUSER_FT_DIR) 348 return ENOTDIR; 349 if (begin != 0) 350 return EISDIR; 351 if (size != RUMP_ETFS_SIZE_ENDOFF) 352 return EISDIR; 353 size = fsize; 354 } else { 355 if (begin > fsize) 356 return EINVAL; 357 if (size == RUMP_ETFS_SIZE_ENDOFF) 358 size = fsize - begin; 359 if (begin + size > fsize) 360 return EINVAL; 361 } 362 363 if (ftype == RUMP_ETFS_BLK || ftype == RUMP_ETFS_CHR) { 364 error = rumpblk_register(hostpath, &dmin, begin, size); 365 if (error != 0) { 366 return error; 367 } 368 rdev = makedev(RUMPBLK_DEVMAJOR, dmin); 369 } 370 371 et = kmem_alloc(sizeof(*et), KM_SLEEP); 372 strcpy(et->et_key, key); 373 et->et_keylen = strlen(et->et_key); 374 et->et_rn = rn = makeprivate(ettype_to_vtype(ftype), rdev, size, true); 375 et->et_removing = false; 376 et->et_blkmin = dmin; 377 378 rn->rn_flags |= RUMPNODE_ET_PHONE_HOST; 379 380 if (ftype == RUMP_ETFS_REG || REGDIR(ftype) || et->et_blkmin != -1) { 381 size_t len = strlen(hostpath)+1; 382 383 rn->rn_hostpath = malloc(len, M_TEMP, M_WAITOK | M_ZERO); 384 memcpy(rn->rn_hostpath, hostpath, len); 385 rn->rn_offset = begin; 386 } 387 388 if (REGDIR(ftype)) { 389 rn->rn_flags |= RUMPNODE_DIR_ET; 390 et->et_prefixkey = true; 391 } else { 392 et->et_prefixkey = false; 393 } 394 395 if (ftype == RUMP_ETFS_DIR_SUBDIRS) 396 rn->rn_flags |= RUMPNODE_DIR_ETSUBS; 397 398 mutex_enter(&etfs_lock); 399 if (etfs_find(key, NULL, REGDIR(ftype))) { 400 mutex_exit(&etfs_lock); 401 if (et->et_blkmin != -1) 402 rumpblk_deregister(hostpath); 403 if (et->et_rn->rn_hostpath != NULL) 404 free(et->et_rn->rn_hostpath, M_TEMP); 405 kmem_free(et->et_rn, sizeof(*et->et_rn)); 406 kmem_free(et, sizeof(*et)); 407 return EEXIST; 408 } 409 LIST_INSERT_HEAD(&etfs_list, et, et_entries); 410 mutex_exit(&etfs_lock); 411 412 if (ftype == RUMP_ETFS_BLK) { 413 format_bytes(buf, sizeof(buf), size); 414 aprint_verbose("/%s: hostpath %s (%s)\n", key, hostpath, buf); 415 } 416 417 return 0; 418 } 419 #undef REGDIR 420 421 int 422 rump_etfs_register(const char *key, const char *hostpath, 423 enum rump_etfs_type ftype) 424 { 425 426 return doregister(key, hostpath, ftype, 0, RUMP_ETFS_SIZE_ENDOFF); 427 } 428 429 int 430 rump_etfs_register_withsize(const char *key, const char *hostpath, 431 enum rump_etfs_type ftype, uint64_t begin, uint64_t size) 432 { 433 434 return doregister(key, hostpath, ftype, begin, size); 435 } 436 437 /* remove etfs mapping. caller's responsibility to make sure it's not in use */ 438 int 439 rump_etfs_remove(const char *key) 440 { 441 struct etfs *et; 442 size_t keylen; 443 int rv; 444 445 if (key[0] != '/') { 446 return EINVAL; 447 } 448 while (key[0] == '/') { 449 key++; 450 } 451 452 keylen = strlen(key); 453 454 mutex_enter(&etfs_lock); 455 LIST_FOREACH(et, &etfs_list, et_entries) { 456 if (keylen == et->et_keylen && strcmp(et->et_key, key) == 0) { 457 if (et->et_removing) 458 et = NULL; 459 else 460 et->et_removing = true; 461 break; 462 } 463 } 464 mutex_exit(&etfs_lock); 465 if (!et) 466 return ENOENT; 467 468 /* 469 * ok, we know what we want to remove and have signalled there 470 * actually are men at work. first, unregister from rumpblk 471 */ 472 if (et->et_blkmin != -1) { 473 rv = rumpblk_deregister(et->et_rn->rn_hostpath); 474 } else { 475 rv = 0; 476 } 477 KASSERT(rv == 0); 478 479 /* then do the actual removal */ 480 mutex_enter(&etfs_lock); 481 LIST_REMOVE(et, et_entries); 482 mutex_exit(&etfs_lock); 483 484 /* node is unreachable, safe to nuke all device copies */ 485 if (et->et_blkmin != -1) { 486 vdevgone(RUMPBLK_DEVMAJOR, et->et_blkmin, et->et_blkmin, VBLK); 487 } else { 488 struct vnode *vp; 489 490 mutex_enter(&reclock); 491 if ((vp = et->et_rn->rn_vp) != NULL) 492 mutex_enter(&vp->v_interlock); 493 mutex_exit(&reclock); 494 if (vp && vget(vp, 0) == 0) 495 vgone(vp); 496 } 497 498 if (et->et_rn->rn_hostpath != NULL) 499 free(et->et_rn->rn_hostpath, M_TEMP); 500 kmem_free(et->et_rn, sizeof(*et->et_rn)); 501 kmem_free(et, sizeof(*et)); 502 503 return 0; 504 } 505 506 /* 507 * rumpfs 508 */ 509 510 static struct rumpfs_node * 511 makeprivate(enum vtype vt, dev_t rdev, off_t size, bool et) 512 { 513 struct rumpfs_node *rn; 514 struct vattr *va; 515 struct timespec ts; 516 517 rn = kmem_zalloc(sizeof(*rn), KM_SLEEP); 518 519 switch (vt) { 520 case VDIR: 521 LIST_INIT(&rn->rn_dir); 522 break; 523 case VREG: 524 if (et) { 525 rn->rn_readfd = -1; 526 rn->rn_writefd = -1; 527 } 528 break; 529 default: 530 break; 531 } 532 533 nanotime(&ts); 534 535 va = &rn->rn_va; 536 va->va_type = vt; 537 va->va_mode = 0755; 538 if (vt == VDIR) 539 va->va_nlink = 2; 540 else 541 va->va_nlink = 1; 542 va->va_uid = 0; 543 va->va_gid = 0; 544 va->va_fsid = 545 va->va_fileid = atomic_inc_uint_nv(&lastino); 546 va->va_size = size; 547 va->va_blocksize = 512; 548 va->va_atime = ts; 549 va->va_mtime = ts; 550 va->va_ctime = ts; 551 va->va_birthtime = ts; 552 va->va_gen = 0; 553 va->va_flags = 0; 554 va->va_rdev = rdev; 555 va->va_bytes = 512; 556 va->va_filerev = 0; 557 va->va_vaflags = 0; 558 559 return rn; 560 } 561 562 static int 563 makevnode(struct mount *mp, struct rumpfs_node *rn, struct vnode **vpp) 564 { 565 struct vnode *vp; 566 int (**vpops)(void *); 567 struct vattr *va = &rn->rn_va; 568 int rv; 569 570 KASSERT(!mutex_owned(&reclock)); 571 572 if (va->va_type == VCHR || va->va_type == VBLK) { 573 vpops = rump_specop_p; 574 } else { 575 vpops = rump_vnodeop_p; 576 } 577 578 rv = getnewvnode(VT_RUMP, mp, vpops, &vp); 579 if (rv) 580 return rv; 581 582 vp->v_size = vp->v_writesize = va->va_size; 583 vp->v_type = va->va_type; 584 585 if (vpops == rump_specop_p) { 586 spec_node_init(vp, va->va_rdev); 587 } 588 vp->v_data = rn; 589 590 genfs_node_init(vp, &rumpfs_genfsops); 591 vn_lock(vp, LK_RETRY | LK_EXCLUSIVE); 592 mutex_enter(&reclock); 593 rn->rn_vp = vp; 594 mutex_exit(&reclock); 595 596 *vpp = vp; 597 598 return 0; 599 } 600 601 602 static void 603 makedir(struct rumpfs_node *rnd, 604 struct componentname *cnp, struct rumpfs_node *rn) 605 { 606 struct rumpfs_dent *rdent; 607 608 rdent = kmem_alloc(sizeof(*rdent), KM_SLEEP); 609 rdent->rd_name = kmem_alloc(cnp->cn_namelen+1, KM_SLEEP); 610 rdent->rd_node = rn; 611 strlcpy(rdent->rd_name, cnp->cn_nameptr, cnp->cn_namelen+1); 612 rdent->rd_namelen = strlen(rdent->rd_name); 613 614 LIST_INSERT_HEAD(&rnd->rn_dir, rdent, rd_entries); 615 } 616 617 static void 618 freedir(struct rumpfs_node *rnd, struct componentname *cnp) 619 { 620 struct rumpfs_dent *rd = NULL; 621 622 LIST_FOREACH(rd, &rnd->rn_dir, rd_entries) { 623 if (rd->rd_namelen == cnp->cn_namelen && 624 strncmp(rd->rd_name, cnp->cn_nameptr, 625 cnp->cn_namelen) == 0) 626 break; 627 } 628 if (rd == NULL) 629 panic("could not find directory entry: %s", cnp->cn_nameptr); 630 631 if (cnp->cn_flags & DOWHITEOUT) { 632 rd->rd_node = RUMPFS_WHITEOUT; 633 } else { 634 LIST_REMOVE(rd, rd_entries); 635 kmem_free(rd->rd_name, rd->rd_namelen+1); 636 kmem_free(rd, sizeof(*rd)); 637 } 638 } 639 640 /* 641 * Simple lookup for rump file systems. 642 * 643 * uhm, this is twisted. C F C C, hope of C C F C looming 644 */ 645 static int 646 rump_vop_lookup(void *v) 647 { 648 struct vop_lookup_args /* { 649 struct vnode *a_dvp; 650 struct vnode **a_vpp; 651 struct componentname *a_cnp; 652 }; */ *ap = v; 653 struct componentname *cnp = ap->a_cnp; 654 struct vnode *dvp = ap->a_dvp; 655 struct vnode **vpp = ap->a_vpp; 656 struct vnode *vp; 657 struct rumpfs_node *rnd = dvp->v_data, *rn; 658 struct rumpfs_dent *rd = NULL; 659 struct etfs *et; 660 bool dotdot = (cnp->cn_flags & ISDOTDOT) != 0; 661 int rv = 0; 662 663 *vpp = NULL; 664 665 if ((cnp->cn_flags & ISLASTCN) 666 && (dvp->v_mount->mnt_flag & MNT_RDONLY) 667 && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 668 return EROFS; 669 670 /* check for dot, return directly if the case */ 671 if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { 672 vref(dvp); 673 *vpp = dvp; 674 return 0; 675 } 676 677 /* we don't do rename */ 678 if (!(((cnp->cn_flags & ISLASTCN) == 0) || (cnp->cn_nameiop != RENAME))) 679 return EOPNOTSUPP; 680 681 /* check for etfs */ 682 if (dvp == rootvnode && cnp->cn_nameiop == LOOKUP) { 683 bool found; 684 mutex_enter(&etfs_lock); 685 found = etfs_find(cnp->cn_nameptr, &et, false); 686 mutex_exit(&etfs_lock); 687 688 if (found) { 689 rn = et->et_rn; 690 cnp->cn_consume += et->et_keylen - cnp->cn_namelen; 691 if (rn->rn_va.va_type != VDIR) 692 cnp->cn_flags &= ~REQUIREDIR; 693 goto getvnode; 694 } 695 } 696 697 if (rnd->rn_flags & RUMPNODE_DIR_ET) { 698 uint64_t fsize; 699 char *newpath; 700 size_t newpathlen; 701 int hft, error; 702 703 if (dotdot) 704 return EOPNOTSUPP; 705 706 newpathlen = strlen(rnd->rn_hostpath) + 1 + cnp->cn_namelen + 1; 707 newpath = malloc(newpathlen, M_TEMP, M_WAITOK); 708 709 strlcpy(newpath, rnd->rn_hostpath, newpathlen); 710 strlcat(newpath, "/", newpathlen); 711 strlcat(newpath, cnp->cn_nameptr, newpathlen); 712 713 if (rumpuser_getfileinfo(newpath, &fsize, &hft, &error)) { 714 free(newpath, M_TEMP); 715 return error; 716 } 717 718 /* allow only dirs and regular files */ 719 if (hft != RUMPUSER_FT_REG && hft != RUMPUSER_FT_DIR) { 720 free(newpath, M_TEMP); 721 return ENOENT; 722 } 723 724 rn = makeprivate(hft_to_vtype(hft), NODEV, fsize, true); 725 rn->rn_flags |= RUMPNODE_CANRECLAIM; 726 if (rnd->rn_flags & RUMPNODE_DIR_ETSUBS) { 727 rn->rn_flags |= RUMPNODE_DIR_ET | RUMPNODE_DIR_ETSUBS; 728 rn->rn_flags |= RUMPNODE_ET_PHONE_HOST; 729 } 730 rn->rn_hostpath = newpath; 731 732 goto getvnode; 733 } else { 734 if (dotdot) { 735 rn = rnd->rn_parent; 736 goto getvnode; 737 } else { 738 LIST_FOREACH(rd, &rnd->rn_dir, rd_entries) { 739 if (rd->rd_namelen == cnp->cn_namelen && 740 strncmp(rd->rd_name, cnp->cn_nameptr, 741 cnp->cn_namelen) == 0) 742 break; 743 } 744 } 745 } 746 747 if (!rd && ((cnp->cn_flags & ISLASTCN) == 0||cnp->cn_nameiop != CREATE)) 748 return ENOENT; 749 750 if (!rd && (cnp->cn_flags & ISLASTCN) && cnp->cn_nameiop == CREATE) { 751 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 752 return EROFS; 753 return EJUSTRETURN; 754 } 755 756 if (RDENT_ISWHITEOUT(rd)) { 757 cnp->cn_flags |= ISWHITEOUT; 758 return ENOENT; 759 } 760 761 rn = rd->rd_node; 762 763 getvnode: 764 KASSERT(rn); 765 if (dotdot) 766 VOP_UNLOCK(dvp); 767 mutex_enter(&reclock); 768 if ((vp = rn->rn_vp)) { 769 mutex_enter(&vp->v_interlock); 770 mutex_exit(&reclock); 771 if (vget(vp, LK_EXCLUSIVE)) { 772 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 773 goto getvnode; 774 } 775 *vpp = vp; 776 } else { 777 mutex_exit(&reclock); 778 rv = makevnode(dvp->v_mount, rn, vpp); 779 } 780 if (dotdot) 781 vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 782 783 return rv; 784 } 785 786 int 787 rump_vop_access(void *v) 788 { 789 struct vop_access_args /* { 790 const struct vnodeop_desc *a_desc; 791 struct vnode *a_vp; 792 int a_mode; 793 kauth_cred_t a_cred; 794 } */ *ap = v; 795 struct vnode *vp = ap->a_vp; 796 int mode = ap->a_mode; 797 798 if (mode & VWRITE) { 799 switch (vp->v_type) { 800 case VDIR: 801 case VLNK: 802 case VREG: 803 if ((vp->v_mount->mnt_flag & MNT_RDONLY)) 804 return EROFS; 805 break; 806 default: 807 break; 808 } 809 } 810 811 return 0; 812 } 813 814 static int 815 rump_vop_getattr(void *v) 816 { 817 struct vop_getattr_args /* { 818 struct vnode *a_vp; 819 struct vattr *a_vap; 820 kauth_cred_t a_cred; 821 } */ *ap = v; 822 struct vnode *vp = ap->a_vp; 823 struct rumpfs_node *rn = vp->v_data; 824 struct vattr *vap = ap->a_vap; 825 826 memcpy(vap, &rn->rn_va, sizeof(struct vattr)); 827 vap->va_size = vp->v_size; 828 return 0; 829 } 830 831 static int 832 rump_vop_setattr(void *v) 833 { 834 struct vop_getattr_args /* { 835 struct vnode *a_vp; 836 struct vattr *a_vap; 837 kauth_cred_t a_cred; 838 } */ *ap = v; 839 struct vnode *vp = ap->a_vp; 840 struct vattr *vap = ap->a_vap; 841 struct rumpfs_node *rn = vp->v_data; 842 843 #define SETIFVAL(a,t) if (vap->a != (t)VNOVAL) rn->rn_va.a = vap->a 844 SETIFVAL(va_mode, mode_t); 845 SETIFVAL(va_uid, uid_t); 846 SETIFVAL(va_gid, gid_t); 847 SETIFVAL(va_atime.tv_sec, time_t); 848 SETIFVAL(va_ctime.tv_sec, time_t); 849 SETIFVAL(va_mtime.tv_sec, time_t); 850 SETIFVAL(va_birthtime.tv_sec, time_t); 851 SETIFVAL(va_atime.tv_nsec, long); 852 SETIFVAL(va_ctime.tv_nsec, long); 853 SETIFVAL(va_mtime.tv_nsec, long); 854 SETIFVAL(va_birthtime.tv_nsec, long); 855 SETIFVAL(va_flags, u_long); 856 #undef SETIFVAL 857 858 if (vp->v_type == VREG && 859 vap->va_size != VSIZENOTSET && 860 vap->va_size != rn->rn_dlen) { 861 void *newdata; 862 size_t copylen, newlen; 863 864 newlen = vap->va_size; 865 newdata = rump_hypermalloc(newlen, 0, true, "rumpfs"); 866 867 copylen = MIN(rn->rn_dlen, newlen); 868 memset(newdata, 0, newlen); 869 memcpy(newdata, rn->rn_data, copylen); 870 rump_hyperfree(rn->rn_data, rn->rn_dlen); 871 872 rn->rn_data = newdata; 873 rn->rn_dlen = newlen; 874 uvm_vnp_setsize(vp, newlen); 875 } 876 return 0; 877 } 878 879 static int 880 rump_vop_mkdir(void *v) 881 { 882 struct vop_mkdir_args /* { 883 struct vnode *a_dvp; 884 struct vnode **a_vpp; 885 struct componentname *a_cnp; 886 struct vattr *a_vap; 887 }; */ *ap = v; 888 struct vnode *dvp = ap->a_dvp; 889 struct vnode **vpp = ap->a_vpp; 890 struct componentname *cnp = ap->a_cnp; 891 struct rumpfs_node *rnd = dvp->v_data, *rn; 892 int rv = 0; 893 894 rn = makeprivate(VDIR, NODEV, DEV_BSIZE, false); 895 rn->rn_parent = rnd; 896 rv = makevnode(dvp->v_mount, rn, vpp); 897 if (rv) 898 goto out; 899 900 makedir(rnd, cnp, rn); 901 902 out: 903 vput(dvp); 904 return rv; 905 } 906 907 static int 908 rump_vop_rmdir(void *v) 909 { 910 struct vop_rmdir_args /* { 911 struct vnode *a_dvp; 912 struct vnode *a_vp; 913 struct componentname *a_cnp; 914 }; */ *ap = v; 915 struct vnode *dvp = ap->a_dvp; 916 struct vnode *vp = ap->a_vp; 917 struct componentname *cnp = ap->a_cnp; 918 struct rumpfs_node *rnd = dvp->v_data; 919 struct rumpfs_node *rn = vp->v_data; 920 int rv = 0; 921 922 if (!LIST_EMPTY(&rn->rn_dir)) { 923 rv = ENOTEMPTY; 924 goto out; 925 } 926 927 freedir(rnd, cnp); 928 rn->rn_flags |= RUMPNODE_CANRECLAIM; 929 930 out: 931 vput(dvp); 932 vput(vp); 933 934 return rv; 935 } 936 937 static int 938 rump_vop_remove(void *v) 939 { 940 struct vop_rmdir_args /* { 941 struct vnode *a_dvp; 942 struct vnode *a_vp; 943 struct componentname *a_cnp; 944 }; */ *ap = v; 945 struct vnode *dvp = ap->a_dvp; 946 struct vnode *vp = ap->a_vp; 947 struct componentname *cnp = ap->a_cnp; 948 struct rumpfs_node *rnd = dvp->v_data; 949 struct rumpfs_node *rn = vp->v_data; 950 int rv = 0; 951 952 if (rn->rn_flags & RUMPNODE_ET_PHONE_HOST) 953 return EOPNOTSUPP; 954 955 if (vp->v_type == VREG) { 956 rump_hyperfree(rn->rn_data, rn->rn_dlen); 957 } 958 959 freedir(rnd, cnp); 960 rn->rn_flags |= RUMPNODE_CANRECLAIM; 961 962 vput(dvp); 963 vput(vp); 964 965 return rv; 966 } 967 968 static int 969 rump_vop_mknod(void *v) 970 { 971 struct vop_mknod_args /* { 972 struct vnode *a_dvp; 973 struct vnode **a_vpp; 974 struct componentname *a_cnp; 975 struct vattr *a_vap; 976 }; */ *ap = v; 977 struct vnode *dvp = ap->a_dvp; 978 struct vnode **vpp = ap->a_vpp; 979 struct componentname *cnp = ap->a_cnp; 980 struct vattr *va = ap->a_vap; 981 struct rumpfs_node *rnd = dvp->v_data, *rn; 982 int rv; 983 984 rn = makeprivate(va->va_type, va->va_rdev, DEV_BSIZE, false); 985 rv = makevnode(dvp->v_mount, rn, vpp); 986 if (rv) 987 goto out; 988 989 makedir(rnd, cnp, rn); 990 991 out: 992 vput(dvp); 993 return rv; 994 } 995 996 static int 997 rump_vop_create(void *v) 998 { 999 struct vop_create_args /* { 1000 struct vnode *a_dvp; 1001 struct vnode **a_vpp; 1002 struct componentname *a_cnp; 1003 struct vattr *a_vap; 1004 }; */ *ap = v; 1005 struct vnode *dvp = ap->a_dvp; 1006 struct vnode **vpp = ap->a_vpp; 1007 struct componentname *cnp = ap->a_cnp; 1008 struct vattr *va = ap->a_vap; 1009 struct rumpfs_node *rnd = dvp->v_data, *rn; 1010 off_t newsize; 1011 int rv; 1012 1013 newsize = va->va_type == VSOCK ? DEV_BSIZE : 0; 1014 rn = makeprivate(va->va_type, NODEV, newsize, false); 1015 rv = makevnode(dvp->v_mount, rn, vpp); 1016 if (rv) 1017 goto out; 1018 1019 makedir(rnd, cnp, rn); 1020 1021 out: 1022 vput(dvp); 1023 return rv; 1024 } 1025 1026 static int 1027 rump_vop_symlink(void *v) 1028 { 1029 struct vop_symlink_args /* { 1030 struct vnode *a_dvp; 1031 struct vnode **a_vpp; 1032 struct componentname *a_cnp; 1033 struct vattr *a_vap; 1034 char *a_target; 1035 }; */ *ap = v; 1036 struct vnode *dvp = ap->a_dvp; 1037 struct vnode **vpp = ap->a_vpp; 1038 struct componentname *cnp = ap->a_cnp; 1039 struct rumpfs_node *rnd = dvp->v_data, *rn; 1040 const char *target = ap->a_target; 1041 size_t linklen; 1042 int rv; 1043 1044 linklen = strlen(target); 1045 KASSERT(linklen < MAXPATHLEN); 1046 rn = makeprivate(VLNK, NODEV, linklen, false); 1047 rv = makevnode(dvp->v_mount, rn, vpp); 1048 if (rv) 1049 goto out; 1050 1051 makedir(rnd, cnp, rn); 1052 1053 KASSERT(linklen < MAXPATHLEN); 1054 rn->rn_linktarg = PNBUF_GET(); 1055 rn->rn_linklen = linklen; 1056 strcpy(rn->rn_linktarg, target); 1057 1058 out: 1059 vput(dvp); 1060 return rv; 1061 } 1062 1063 static int 1064 rump_vop_readlink(void *v) 1065 { 1066 struct vop_readlink_args /* { 1067 struct vnode *a_vp; 1068 struct uio *a_uio; 1069 kauth_cred_t a_cred; 1070 }; */ *ap = v; 1071 struct vnode *vp = ap->a_vp; 1072 struct rumpfs_node *rn = vp->v_data; 1073 struct uio *uio = ap->a_uio; 1074 1075 return uiomove(rn->rn_linktarg, rn->rn_linklen, uio); 1076 } 1077 1078 static int 1079 rump_vop_whiteout(void *v) 1080 { 1081 struct vop_whiteout_args /* { 1082 struct vnode *a_dvp; 1083 struct componentname *a_cnp; 1084 int a_flags; 1085 } */ *ap = v; 1086 struct vnode *dvp = ap->a_dvp; 1087 struct rumpfs_node *rnd = dvp->v_data; 1088 struct componentname *cnp = ap->a_cnp; 1089 int flags = ap->a_flags; 1090 1091 switch (flags) { 1092 case LOOKUP: 1093 break; 1094 case CREATE: 1095 makedir(rnd, cnp, RUMPFS_WHITEOUT); 1096 break; 1097 case DELETE: 1098 cnp->cn_flags &= ~DOWHITEOUT; /* cargo culting never fails ? */ 1099 freedir(rnd, cnp); 1100 break; 1101 default: 1102 panic("unknown whiteout op %d", flags); 1103 } 1104 1105 return 0; 1106 } 1107 1108 static int 1109 rump_vop_open(void *v) 1110 { 1111 struct vop_open_args /* { 1112 struct vnode *a_vp; 1113 int a_mode; 1114 kauth_cred_t a_cred; 1115 } */ *ap = v; 1116 struct vnode *vp = ap->a_vp; 1117 struct rumpfs_node *rn = vp->v_data; 1118 int mode = ap->a_mode; 1119 int error = EINVAL; 1120 1121 if (vp->v_type != VREG || (rn->rn_flags & RUMPNODE_ET_PHONE_HOST) == 0) 1122 return 0; 1123 1124 if (mode & FREAD) { 1125 if (rn->rn_readfd != -1) 1126 return 0; 1127 rn->rn_readfd = rumpuser_open(rn->rn_hostpath, 1128 O_RDONLY, &error); 1129 } 1130 1131 if (mode & FWRITE) { 1132 if (rn->rn_writefd != -1) 1133 return 0; 1134 rn->rn_writefd = rumpuser_open(rn->rn_hostpath, 1135 O_WRONLY, &error); 1136 } 1137 1138 return error; 1139 } 1140 1141 /* simple readdir. event omits dotstuff and periods */ 1142 static int 1143 rump_vop_readdir(void *v) 1144 { 1145 struct vop_readdir_args /* { 1146 struct vnode *a_vp; 1147 struct uio *a_uio; 1148 kauth_cred_t a_cred; 1149 int *a_eofflag; 1150 off_t **a_cookies; 1151 int *a_ncookies; 1152 } */ *ap = v; 1153 struct vnode *vp = ap->a_vp; 1154 struct uio *uio = ap->a_uio; 1155 struct rumpfs_node *rnd = vp->v_data; 1156 struct rumpfs_dent *rdent; 1157 unsigned i; 1158 int rv = 0; 1159 1160 /* seek to current entry */ 1161 for (i = 0, rdent = LIST_FIRST(&rnd->rn_dir); 1162 (i < uio->uio_offset) && rdent; 1163 i++, rdent = LIST_NEXT(rdent, rd_entries)) 1164 continue; 1165 if (!rdent) 1166 goto out; 1167 1168 /* copy entries */ 1169 for (; rdent && uio->uio_resid > 0; 1170 rdent = LIST_NEXT(rdent, rd_entries), i++) { 1171 struct dirent dent; 1172 1173 strlcpy(dent.d_name, rdent->rd_name, sizeof(dent.d_name)); 1174 dent.d_namlen = strlen(dent.d_name); 1175 dent.d_reclen = _DIRENT_RECLEN(&dent, dent.d_namlen); 1176 1177 if (__predict_false(RDENT_ISWHITEOUT(rdent))) { 1178 dent.d_fileno = INO_WHITEOUT; 1179 dent.d_type = DT_WHT; 1180 } else { 1181 dent.d_fileno = rdent->rd_node->rn_va.va_fileid; 1182 dent.d_type = vtype2dt(rdent->rd_node->rn_va.va_type); 1183 } 1184 1185 if (uio->uio_resid < dent.d_reclen) { 1186 i--; 1187 break; 1188 } 1189 1190 rv = uiomove(&dent, dent.d_reclen, uio); 1191 if (rv) { 1192 i--; 1193 break; 1194 } 1195 } 1196 1197 out: 1198 if (ap->a_cookies) { 1199 *ap->a_ncookies = 0; 1200 *ap->a_cookies = NULL; 1201 } 1202 if (rdent) 1203 *ap->a_eofflag = 0; 1204 else 1205 *ap->a_eofflag = 1; 1206 uio->uio_offset = i; 1207 1208 return rv; 1209 } 1210 1211 static int 1212 etread(struct rumpfs_node *rn, struct uio *uio) 1213 { 1214 uint8_t *buf; 1215 size_t bufsize; 1216 ssize_t n; 1217 int error = 0; 1218 1219 bufsize = uio->uio_resid; 1220 buf = kmem_alloc(bufsize, KM_SLEEP); 1221 if ((n = rumpuser_pread(rn->rn_readfd, buf, bufsize, 1222 uio->uio_offset + rn->rn_offset, &error)) == -1) 1223 goto out; 1224 KASSERT(n <= bufsize); 1225 error = uiomove(buf, n, uio); 1226 1227 out: 1228 kmem_free(buf, bufsize); 1229 return error; 1230 1231 } 1232 1233 static int 1234 rump_vop_read(void *v) 1235 { 1236 struct vop_read_args /* { 1237 struct vnode *a_vp; 1238 struct uio *a_uio; 1239 int ioflags a_ioflag; 1240 kauth_cred_t a_cred; 1241 }; */ *ap = v; 1242 struct vnode *vp = ap->a_vp; 1243 struct rumpfs_node *rn = vp->v_data; 1244 struct uio *uio = ap->a_uio; 1245 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1246 off_t chunk; 1247 int error = 0; 1248 1249 /* et op? */ 1250 if (rn->rn_flags & RUMPNODE_ET_PHONE_HOST) 1251 return etread(rn, uio); 1252 1253 /* otherwise, it's off to ubc with us */ 1254 while (uio->uio_resid > 0) { 1255 chunk = MIN(uio->uio_resid, (off_t)rn->rn_dlen-uio->uio_offset); 1256 if (chunk == 0) 1257 break; 1258 error = ubc_uiomove(&vp->v_uobj, uio, chunk, advice, 1259 UBC_READ | UBC_PARTIALOK | UBC_WANT_UNMAP(vp)?UBC_UNMAP:0); 1260 if (error) 1261 break; 1262 } 1263 1264 return error; 1265 } 1266 1267 static int 1268 etwrite(struct rumpfs_node *rn, struct uio *uio) 1269 { 1270 uint8_t *buf; 1271 size_t bufsize; 1272 ssize_t n; 1273 int error = 0; 1274 1275 bufsize = uio->uio_resid; 1276 buf = kmem_alloc(bufsize, KM_SLEEP); 1277 error = uiomove(buf, bufsize, uio); 1278 if (error) 1279 goto out; 1280 KASSERT(uio->uio_resid == 0); 1281 n = rumpuser_pwrite(rn->rn_writefd, buf, bufsize, 1282 (uio->uio_offset-bufsize) + rn->rn_offset, &error); 1283 if (n >= 0) { 1284 KASSERT(n <= bufsize); 1285 uio->uio_resid = bufsize - n; 1286 } 1287 1288 out: 1289 kmem_free(buf, bufsize); 1290 return error; 1291 } 1292 1293 static int 1294 rump_vop_write(void *v) 1295 { 1296 struct vop_read_args /* { 1297 struct vnode *a_vp; 1298 struct uio *a_uio; 1299 int ioflags a_ioflag; 1300 kauth_cred_t a_cred; 1301 }; */ *ap = v; 1302 struct vnode *vp = ap->a_vp; 1303 struct rumpfs_node *rn = vp->v_data; 1304 struct uio *uio = ap->a_uio; 1305 const int advice = IO_ADV_DECODE(ap->a_ioflag); 1306 void *olddata; 1307 size_t oldlen, newlen; 1308 off_t chunk; 1309 int error = 0; 1310 bool allocd = false; 1311 1312 if (ap->a_ioflag & IO_APPEND) 1313 uio->uio_offset = vp->v_size; 1314 1315 /* consult et? */ 1316 if (rn->rn_flags & RUMPNODE_ET_PHONE_HOST) 1317 return etwrite(rn, uio); 1318 1319 /* 1320 * Otherwise, it's a case of ubcmove. 1321 */ 1322 1323 /* 1324 * First, make sure we have enough storage. 1325 * 1326 * No, you don't need to tell me it's not very efficient. 1327 * No, it doesn't really support sparse files, just fakes it. 1328 */ 1329 newlen = uio->uio_offset + uio->uio_resid; 1330 oldlen = 0; /* XXXgcc */ 1331 olddata = NULL; 1332 if (rn->rn_dlen < newlen) { 1333 oldlen = rn->rn_dlen; 1334 olddata = rn->rn_data; 1335 1336 rn->rn_data = rump_hypermalloc(newlen, 0, true, "rumpfs"); 1337 rn->rn_dlen = newlen; 1338 memset(rn->rn_data, 0, newlen); 1339 memcpy(rn->rn_data, olddata, oldlen); 1340 allocd = true; 1341 uvm_vnp_setsize(vp, newlen); 1342 } 1343 1344 /* ok, we have enough stooorage. write */ 1345 while (uio->uio_resid > 0) { 1346 chunk = MIN(uio->uio_resid, (off_t)rn->rn_dlen-uio->uio_offset); 1347 if (chunk == 0) 1348 break; 1349 error = ubc_uiomove(&vp->v_uobj, uio, chunk, advice, 1350 UBC_WRITE | UBC_PARTIALOK | UBC_WANT_UNMAP(vp)?UBC_UNMAP:0); 1351 if (error) 1352 break; 1353 } 1354 1355 if (allocd) { 1356 if (error) { 1357 rump_hyperfree(rn->rn_data, newlen); 1358 rn->rn_data = olddata; 1359 rn->rn_dlen = oldlen; 1360 uvm_vnp_setsize(vp, oldlen); 1361 } else { 1362 rump_hyperfree(olddata, oldlen); 1363 } 1364 } 1365 1366 return error; 1367 } 1368 1369 static int 1370 rump_vop_bmap(void *v) 1371 { 1372 struct vop_bmap_args /* { 1373 struct vnode *a_vp; 1374 daddr_t a_bn; 1375 struct vnode **a_vpp; 1376 daddr_t *a_bnp; 1377 int *a_runp; 1378 } */ *ap = v; 1379 1380 /* 1:1 mapping */ 1381 if (ap->a_vpp) 1382 *ap->a_vpp = ap->a_vp; 1383 if (ap->a_bnp) 1384 *ap->a_bnp = ap->a_bn; 1385 if (ap->a_runp) 1386 *ap->a_runp = 16; 1387 1388 return 0; 1389 } 1390 1391 static int 1392 rump_vop_strategy(void *v) 1393 { 1394 struct vop_strategy_args /* { 1395 struct vnode *a_vp; 1396 struct buf *a_bp; 1397 } */ *ap = v; 1398 struct vnode *vp = ap->a_vp; 1399 struct rumpfs_node *rn = vp->v_data; 1400 struct buf *bp = ap->a_bp; 1401 off_t copylen, copyoff; 1402 int error; 1403 1404 if (vp->v_type != VREG || rn->rn_flags & RUMPNODE_ET_PHONE_HOST) { 1405 error = EINVAL; 1406 goto out; 1407 } 1408 1409 copyoff = bp->b_blkno << DEV_BSHIFT; 1410 copylen = MIN(rn->rn_dlen - copyoff, bp->b_bcount); 1411 if (BUF_ISWRITE(bp)) { 1412 memcpy((uint8_t *)rn->rn_data + copyoff, bp->b_data, copylen); 1413 } else { 1414 memset((uint8_t*)bp->b_data + copylen, 0, bp->b_bcount-copylen); 1415 memcpy(bp->b_data, (uint8_t *)rn->rn_data + copyoff, copylen); 1416 } 1417 bp->b_resid = 0; 1418 error = 0; 1419 1420 out: 1421 bp->b_error = error; 1422 biodone(bp); 1423 return 0; 1424 } 1425 1426 static int 1427 rump_vop_pathconf(void *v) 1428 { 1429 struct vop_pathconf_args /* { 1430 struct vnode *a_vp; 1431 int a_name; 1432 register_t *a_retval; 1433 }; */ *ap = v; 1434 int name = ap->a_name; 1435 register_t *retval = ap->a_retval; 1436 1437 switch (name) { 1438 case _PC_LINK_MAX: 1439 *retval = LINK_MAX; 1440 return 0; 1441 case _PC_NAME_MAX: 1442 *retval = NAME_MAX; 1443 return 0; 1444 case _PC_PATH_MAX: 1445 *retval = PATH_MAX; 1446 return 0; 1447 case _PC_PIPE_BUF: 1448 *retval = PIPE_BUF; 1449 return 0; 1450 case _PC_CHOWN_RESTRICTED: 1451 *retval = 1; 1452 return 0; 1453 case _PC_NO_TRUNC: 1454 *retval = 1; 1455 return 0; 1456 case _PC_SYNC_IO: 1457 *retval = 1; 1458 return 0; 1459 case _PC_FILESIZEBITS: 1460 *retval = 43; /* this one goes to 11 */ 1461 return 0; 1462 case _PC_SYMLINK_MAX: 1463 *retval = MAXPATHLEN; 1464 return 0; 1465 case _PC_2_SYMLINKS: 1466 *retval = 1; 1467 return 0; 1468 default: 1469 return EINVAL; 1470 } 1471 } 1472 1473 static int 1474 rump_vop_success(void *v) 1475 { 1476 1477 return 0; 1478 } 1479 1480 static int 1481 rump_vop_inactive(void *v) 1482 { 1483 struct vop_inactive_args /* { 1484 struct vnode *a_vp; 1485 bool *a_recycle; 1486 } */ *ap = v; 1487 struct vnode *vp = ap->a_vp; 1488 struct rumpfs_node *rn = vp->v_data; 1489 int error; 1490 1491 if (rn->rn_flags & RUMPNODE_ET_PHONE_HOST && vp->v_type == VREG) { 1492 if (rn->rn_readfd != -1) { 1493 rumpuser_close(rn->rn_readfd, &error); 1494 rn->rn_readfd = -1; 1495 } 1496 if (rn->rn_writefd != -1) { 1497 rumpuser_close(rn->rn_writefd, &error); 1498 rn->rn_writefd = -1; 1499 } 1500 } 1501 *ap->a_recycle = (rn->rn_flags & RUMPNODE_CANRECLAIM) ? true : false; 1502 1503 VOP_UNLOCK(vp); 1504 return 0; 1505 } 1506 1507 static int 1508 rump_vop_reclaim(void *v) 1509 { 1510 struct vop_reclaim_args /* { 1511 struct vnode *a_vp; 1512 } */ *ap = v; 1513 struct vnode *vp = ap->a_vp; 1514 struct rumpfs_node *rn = vp->v_data; 1515 1516 mutex_enter(&reclock); 1517 rn->rn_vp = NULL; 1518 mutex_exit(&reclock); 1519 genfs_node_destroy(vp); 1520 vp->v_data = NULL; 1521 1522 if (rn->rn_flags & RUMPNODE_CANRECLAIM) { 1523 if (vp->v_type == VLNK) 1524 PNBUF_PUT(rn->rn_linktarg); 1525 if (rn->rn_hostpath) 1526 free(rn->rn_hostpath, M_TEMP); 1527 kmem_free(rn, sizeof(*rn)); 1528 } 1529 1530 return 0; 1531 } 1532 1533 static int 1534 rump_vop_spec(void *v) 1535 { 1536 struct vop_generic_args *ap = v; 1537 int (**opvec)(void *); 1538 1539 switch (ap->a_desc->vdesc_offset) { 1540 case VOP_ACCESS_DESCOFFSET: 1541 case VOP_GETATTR_DESCOFFSET: 1542 case VOP_SETATTR_DESCOFFSET: 1543 case VOP_LOCK_DESCOFFSET: 1544 case VOP_UNLOCK_DESCOFFSET: 1545 case VOP_ISLOCKED_DESCOFFSET: 1546 case VOP_RECLAIM_DESCOFFSET: 1547 opvec = rump_vnodeop_p; 1548 break; 1549 default: 1550 opvec = spec_vnodeop_p; 1551 break; 1552 } 1553 1554 return VOCALL(opvec, ap->a_desc->vdesc_offset, v); 1555 } 1556 1557 static int 1558 rump_vop_advlock(void *v) 1559 { 1560 struct vop_advlock_args /* { 1561 const struct vnodeop_desc *a_desc; 1562 struct vnode *a_vp; 1563 void *a_id; 1564 int a_op; 1565 struct flock *a_fl; 1566 int a_flags; 1567 } */ *ap = v; 1568 struct vnode *vp = ap->a_vp; 1569 struct rumpfs_node *rn = vp->v_data; 1570 1571 return lf_advlock(ap, &rn->rn_lockf, vp->v_size); 1572 } 1573 1574 /* 1575 * Begin vfs-level stuff 1576 */ 1577 1578 VFS_PROTOS(rumpfs); 1579 struct vfsops rumpfs_vfsops = { 1580 .vfs_name = MOUNT_RUMPFS, 1581 .vfs_min_mount_data = 0, 1582 .vfs_mount = rumpfs_mount, 1583 .vfs_start = (void *)nullop, 1584 .vfs_unmount = rumpfs_unmount, 1585 .vfs_root = rumpfs_root, 1586 .vfs_quotactl = (void *)eopnotsupp, 1587 .vfs_statvfs = genfs_statvfs, 1588 .vfs_sync = (void *)nullop, 1589 .vfs_vget = rumpfs_vget, 1590 .vfs_fhtovp = (void *)eopnotsupp, 1591 .vfs_vptofh = (void *)eopnotsupp, 1592 .vfs_init = rumpfs_init, 1593 .vfs_reinit = NULL, 1594 .vfs_done = rumpfs_done, 1595 .vfs_mountroot = rumpfs_mountroot, 1596 .vfs_snapshot = (void *)eopnotsupp, 1597 .vfs_extattrctl = (void *)eopnotsupp, 1598 .vfs_suspendctl = (void *)eopnotsupp, 1599 .vfs_renamelock_enter = genfs_renamelock_enter, 1600 .vfs_renamelock_exit = genfs_renamelock_exit, 1601 .vfs_opv_descs = rump_opv_descs, 1602 /* vfs_refcount */ 1603 /* vfs_list */ 1604 }; 1605 1606 static int 1607 rumpfs_mountfs(struct mount *mp) 1608 { 1609 struct rumpfs_mount *rfsmp; 1610 struct rumpfs_node *rn; 1611 int error; 1612 1613 rfsmp = kmem_alloc(sizeof(*rfsmp), KM_SLEEP); 1614 1615 rn = makeprivate(VDIR, NODEV, DEV_BSIZE, false); 1616 rn->rn_parent = rn; 1617 if ((error = makevnode(mp, rn, &rfsmp->rfsmp_rvp)) != 0) 1618 return error; 1619 1620 rfsmp->rfsmp_rvp->v_vflag |= VV_ROOT; 1621 VOP_UNLOCK(rfsmp->rfsmp_rvp); 1622 1623 mp->mnt_data = rfsmp; 1624 mp->mnt_stat.f_namemax = MAXNAMLEN; 1625 mp->mnt_stat.f_iosize = 512; 1626 mp->mnt_flag |= MNT_LOCAL; 1627 mp->mnt_iflag |= IMNT_MPSAFE | IMNT_CAN_RWTORO; 1628 mp->mnt_fs_bshift = DEV_BSHIFT; 1629 vfs_getnewfsid(mp); 1630 1631 return 0; 1632 } 1633 1634 int 1635 rumpfs_mount(struct mount *mp, const char *mntpath, void *arg, size_t *alen) 1636 { 1637 int error; 1638 1639 if (mp->mnt_flag & MNT_UPDATE) { 1640 return 0; 1641 } 1642 1643 error = set_statvfs_info(mntpath, UIO_USERSPACE, "rumpfs", UIO_SYSSPACE, 1644 mp->mnt_op->vfs_name, mp, curlwp); 1645 if (error) 1646 return error; 1647 1648 return rumpfs_mountfs(mp); 1649 } 1650 1651 int 1652 rumpfs_unmount(struct mount *mp, int mntflags) 1653 { 1654 struct rumpfs_mount *rfsmp = mp->mnt_data; 1655 int flags = 0, error; 1656 1657 if (panicstr || mntflags & MNT_FORCE) 1658 flags |= FORCECLOSE; 1659 1660 if ((error = vflush(mp, rfsmp->rfsmp_rvp, flags)) != 0) 1661 return error; 1662 vgone(rfsmp->rfsmp_rvp); /* XXX */ 1663 1664 kmem_free(rfsmp, sizeof(*rfsmp)); 1665 1666 return 0; 1667 } 1668 1669 int 1670 rumpfs_root(struct mount *mp, struct vnode **vpp) 1671 { 1672 struct rumpfs_mount *rfsmp = mp->mnt_data; 1673 1674 vref(rfsmp->rfsmp_rvp); 1675 vn_lock(rfsmp->rfsmp_rvp, LK_EXCLUSIVE | LK_RETRY); 1676 *vpp = rfsmp->rfsmp_rvp; 1677 return 0; 1678 } 1679 1680 int 1681 rumpfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp) 1682 { 1683 1684 return EOPNOTSUPP; 1685 } 1686 1687 void 1688 rumpfs_init() 1689 { 1690 1691 CTASSERT(RUMP_ETFS_SIZE_ENDOFF == RUMPBLK_SIZENOTSET); 1692 1693 mutex_init(&reclock, MUTEX_DEFAULT, IPL_NONE); 1694 mutex_init(&etfs_lock, MUTEX_DEFAULT, IPL_NONE); 1695 } 1696 1697 void 1698 rumpfs_done() 1699 { 1700 1701 mutex_destroy(&reclock); 1702 mutex_destroy(&etfs_lock); 1703 } 1704 1705 int 1706 rumpfs_mountroot() 1707 { 1708 struct mount *mp; 1709 int error; 1710 1711 if ((error = vfs_rootmountalloc(MOUNT_RUMPFS, "rootdev", &mp)) != 0) { 1712 vrele(rootvp); 1713 return error; 1714 } 1715 1716 if ((error = rumpfs_mountfs(mp)) != 0) 1717 panic("mounting rootfs failed: %d", error); 1718 1719 mutex_enter(&mountlist_lock); 1720 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 1721 mutex_exit(&mountlist_lock); 1722 1723 error = set_statvfs_info("/", UIO_SYSSPACE, "rumpfs", UIO_SYSSPACE, 1724 mp->mnt_op->vfs_name, mp, curlwp); 1725 if (error) 1726 panic("set_statvfs_info failed for rootfs: %d", error); 1727 1728 mp->mnt_flag &= ~MNT_RDONLY; 1729 vfs_unbusy(mp, false, NULL); 1730 1731 return 0; 1732 } 1733
Indexes created Tue Sep 30 20:09:53 GMT 2025