vfs_syscalls.c revision 1.220
1 /* $NetBSD: vfs_syscalls.c,v 1.220 2005/05/29 22:24:15 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)vfs_syscalls.c 8.42 (Berkeley) 7/31/95 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: vfs_syscalls.c,v 1.220 2005/05/29 22:24:15 christos Exp $"); 41 42 #include "opt_compat_netbsd.h" 43 #include "opt_compat_43.h" 44 #include "opt_ktrace.h" 45 #include "fss.h" 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/namei.h> 50 #include <sys/filedesc.h> 51 #include <sys/kernel.h> 52 #include <sys/file.h> 53 #include <sys/stat.h> 54 #include <sys/vnode.h> 55 #include <sys/mount.h> 56 #include <sys/proc.h> 57 #include <sys/uio.h> 58 #include <sys/malloc.h> 59 #include <sys/dirent.h> 60 #include <sys/extattr.h> 61 #include <sys/sysctl.h> 62 #include <sys/sa.h> 63 #include <sys/syscallargs.h> 64 #ifdef KTRACE 65 #include <sys/ktrace.h> 66 #endif 67 #ifdef VERIFIED_EXEC 68 #include <sys/verified_exec.h> 69 #endif 70 71 #include <miscfs/genfs/genfs.h> 72 #include <miscfs/syncfs/syncfs.h> 73 74 #if NFSS > 0 75 #include <dev/fssvar.h> 76 #endif 77 78 MALLOC_DEFINE(M_MOUNT, "mount", "vfs mount struct"); 79 80 static int change_dir(struct nameidata *, struct proc *); 81 static int change_flags(struct vnode *, u_long, struct proc *); 82 static int change_mode(struct vnode *, int, struct proc *p); 83 static int change_owner(struct vnode *, uid_t, gid_t, struct proc *, int); 84 static int change_utimes(struct vnode *vp, const struct timeval *, 85 struct proc *p); 86 static int rename_files(const char *, const char *, struct proc *, int); 87 88 void checkdirs(struct vnode *); 89 90 int dovfsusermount = 0; 91 92 /* 93 * Virtual File System System Calls 94 */ 95 96 /* 97 * Mount a file system. 98 */ 99 100 #if defined(COMPAT_09) || defined(COMPAT_43) 101 /* 102 * This table is used to maintain compatibility with 4.3BSD 103 * and NetBSD 0.9 mount syscalls. Note, the order is important! 104 * 105 * Do not modify this table. It should only contain filesystems 106 * supported by NetBSD 0.9 and 4.3BSD. 107 */ 108 const char * const mountcompatnames[] = { 109 NULL, /* 0 = MOUNT_NONE */ 110 MOUNT_FFS, /* 1 = MOUNT_UFS */ 111 MOUNT_NFS, /* 2 */ 112 MOUNT_MFS, /* 3 */ 113 MOUNT_MSDOS, /* 4 */ 114 MOUNT_CD9660, /* 5 = MOUNT_ISOFS */ 115 MOUNT_FDESC, /* 6 */ 116 MOUNT_KERNFS, /* 7 */ 117 NULL, /* 8 = MOUNT_DEVFS */ 118 MOUNT_AFS, /* 9 */ 119 }; 120 const int nmountcompatnames = sizeof(mountcompatnames) / 121 sizeof(mountcompatnames[0]); 122 #endif /* COMPAT_09 || COMPAT_43 */ 123 124 /* ARGSUSED */ 125 int 126 sys_mount(l, v, retval) 127 struct lwp *l; 128 void *v; 129 register_t *retval; 130 { 131 struct sys_mount_args /* { 132 syscallarg(const char *) type; 133 syscallarg(const char *) path; 134 syscallarg(int) flags; 135 syscallarg(void *) data; 136 } */ *uap = v; 137 struct proc *p = l->l_proc; 138 struct vnode *vp; 139 struct mount *mp; 140 int error, flag = 0; 141 char fstypename[MFSNAMELEN]; 142 struct vattr va; 143 struct nameidata nd; 144 struct vfsops *vfs; 145 146 /* 147 * if MNT_GETARGS is specified, it should be only flag. 148 */ 149 150 if ((SCARG(uap, flags) & MNT_GETARGS) != 0 && 151 (SCARG(uap, flags) & ~MNT_GETARGS) != 0) { 152 return EINVAL; 153 } 154 155 if (dovfsusermount == 0 && (SCARG(uap, flags) & MNT_GETARGS) == 0 && 156 (error = suser(p->p_ucred, &p->p_acflag))) 157 return (error); 158 /* 159 * Get vnode to be covered 160 */ 161 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 162 SCARG(uap, path), p); 163 if ((error = namei(&nd)) != 0) 164 return (error); 165 vp = nd.ni_vp; 166 /* 167 * A lookup in VFS_MOUNT might result in an attempt to 168 * lock this vnode again, so make the lock recursive. 169 */ 170 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY | LK_SETRECURSE); 171 if (SCARG(uap, flags) & (MNT_UPDATE | MNT_GETARGS)) { 172 if ((vp->v_flag & VROOT) == 0) { 173 vput(vp); 174 return (EINVAL); 175 } 176 mp = vp->v_mount; 177 flag = mp->mnt_flag; 178 vfs = mp->mnt_op; 179 /* 180 * We only allow the filesystem to be reloaded if it 181 * is currently mounted read-only. 182 */ 183 if ((SCARG(uap, flags) & MNT_RELOAD) && 184 ((mp->mnt_flag & MNT_RDONLY) == 0)) { 185 vput(vp); 186 return (EOPNOTSUPP); /* Needs translation */ 187 } 188 /* 189 * In "highly secure" mode, don't let the caller do anything 190 * but downgrade a filesystem from read-write to read-only. 191 * (see also below; MNT_UPDATE or MNT_GETARGS is required.) 192 */ 193 if (securelevel >= 2 && 194 SCARG(uap, flags) != MNT_GETARGS && 195 SCARG(uap, flags) != 196 (mp->mnt_flag | MNT_RDONLY | 197 MNT_RELOAD | MNT_FORCE | MNT_UPDATE)) { 198 vput(vp); 199 return (EPERM); 200 } 201 mp->mnt_flag |= SCARG(uap, flags) & 202 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 203 /* 204 * Only root, or the user that did the original mount is 205 * permitted to update it. 206 */ 207 if ((mp->mnt_flag & MNT_GETARGS) == 0 && 208 mp->mnt_stat.f_owner != p->p_ucred->cr_uid && 209 (error = suser(p->p_ucred, &p->p_acflag)) != 0) { 210 vput(vp); 211 return (error); 212 } 213 /* 214 * Do not allow NFS export by non-root users. For non-root 215 * users, silently enforce MNT_NOSUID and MNT_NODEV, and 216 * MNT_NOEXEC if mount point is already MNT_NOEXEC. 217 */ 218 if (p->p_ucred->cr_uid != 0) { 219 if (SCARG(uap, flags) & MNT_EXPORTED) { 220 vput(vp); 221 return (EPERM); 222 } 223 SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV; 224 if (flag & MNT_NOEXEC) 225 SCARG(uap, flags) |= MNT_NOEXEC; 226 } 227 if (vfs_busy(mp, LK_NOWAIT, 0)) { 228 vput(vp); 229 return (EPERM); 230 } 231 goto update; 232 } else { 233 if (securelevel >= 2) { 234 vput(vp); 235 return (EPERM); 236 } 237 } 238 /* 239 * If the user is not root, ensure that they own the directory 240 * onto which we are attempting to mount. 241 */ 242 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) != 0 || 243 (va.va_uid != p->p_ucred->cr_uid && 244 (error = suser(p->p_ucred, &p->p_acflag)) != 0)) { 245 vput(vp); 246 return (error); 247 } 248 /* 249 * Do not allow NFS export by non-root users. For non-root users, 250 * silently enforce MNT_NOSUID and MNT_NODEV, and MNT_NOEXEC if the 251 * mount point is already MNT_NOEXEC. 252 */ 253 if (p->p_ucred->cr_uid != 0) { 254 if (SCARG(uap, flags) & MNT_EXPORTED) { 255 vput(vp); 256 return (EPERM); 257 } 258 SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV; 259 if (vp->v_mount->mnt_flag & MNT_NOEXEC) 260 SCARG(uap, flags) |= MNT_NOEXEC; 261 } 262 if ((error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) { 263 vput(vp); 264 return (error); 265 } 266 if (vp->v_type != VDIR) { 267 vput(vp); 268 return (ENOTDIR); 269 } 270 error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL); 271 if (error) { 272 #if defined(COMPAT_09) || defined(COMPAT_43) 273 /* 274 * Historically filesystem types were identified by number. 275 * If we get an integer for the filesystem type instead of a 276 * string, we check to see if it matches one of the historic 277 * filesystem types. 278 */ 279 u_long fsindex = (u_long)SCARG(uap, type); 280 if (fsindex >= nmountcompatnames || 281 mountcompatnames[fsindex] == NULL) { 282 vput(vp); 283 return (ENODEV); 284 } 285 strncpy(fstypename, mountcompatnames[fsindex], MFSNAMELEN); 286 #else 287 vput(vp); 288 return (error); 289 #endif 290 } 291 #ifdef COMPAT_10 292 /* Accept `ufs' as an alias for `ffs'. */ 293 if (!strncmp(fstypename, "ufs", MFSNAMELEN)) 294 strncpy(fstypename, "ffs", MFSNAMELEN); 295 #endif 296 if ((vfs = vfs_getopsbyname(fstypename)) == NULL) { 297 vput(vp); 298 return (ENODEV); 299 } 300 if (vp->v_mountedhere != NULL) { 301 vput(vp); 302 return (EBUSY); 303 } 304 305 /* 306 * Allocate and initialize the file system. 307 */ 308 mp = (struct mount *)malloc((u_long)sizeof(struct mount), 309 M_MOUNT, M_WAITOK); 310 memset((char *)mp, 0, (u_long)sizeof(struct mount)); 311 lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, 0); 312 simple_lock_init(&mp->mnt_slock); 313 (void)vfs_busy(mp, LK_NOWAIT, 0); 314 mp->mnt_op = vfs; 315 vfs->vfs_refcount++; 316 mp->mnt_vnodecovered = vp; 317 mp->mnt_stat.f_owner = p->p_ucred->cr_uid; 318 mp->mnt_unmounter = NULL; 319 mp->mnt_leaf = mp; 320 321 /* 322 * The underlying file system may refuse the mount for 323 * various reasons. Allow the user to force it to happen. 324 */ 325 mp->mnt_flag |= SCARG(uap, flags) & MNT_FORCE; 326 update: 327 if ((SCARG(uap, flags) & MNT_GETARGS) == 0) { 328 /* 329 * Set the mount level flags. 330 */ 331 if (SCARG(uap, flags) & MNT_RDONLY) 332 mp->mnt_flag |= MNT_RDONLY; 333 else if (mp->mnt_flag & MNT_RDONLY) 334 mp->mnt_iflag |= IMNT_WANTRDWR; 335 mp->mnt_flag &= 336 ~(MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | 337 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOCOREDUMP | 338 MNT_NOATIME | MNT_NODEVMTIME | MNT_SYMPERM | MNT_SOFTDEP); 339 mp->mnt_flag |= SCARG(uap, flags) & 340 (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | 341 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOCOREDUMP | 342 MNT_NOATIME | MNT_NODEVMTIME | MNT_SYMPERM | MNT_SOFTDEP | 343 MNT_IGNORE); 344 } 345 /* 346 * Mount the filesystem. 347 */ 348 error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p); 349 if (mp->mnt_flag & (MNT_UPDATE | MNT_GETARGS)) { 350 if (mp->mnt_iflag & IMNT_WANTRDWR) 351 mp->mnt_flag &= ~MNT_RDONLY; 352 if (error) 353 mp->mnt_flag = flag; 354 mp->mnt_flag &=~ 355 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 356 mp->mnt_iflag &=~ IMNT_WANTRDWR; 357 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) { 358 if (mp->mnt_syncer == NULL) 359 error = vfs_allocate_syncvnode(mp); 360 } else { 361 if (mp->mnt_syncer != NULL) 362 vfs_deallocate_syncvnode(mp); 363 } 364 vfs_unbusy(mp); 365 VOP_UNLOCK(vp, 0); 366 vrele(vp); 367 return (error); 368 } 369 /* 370 * Put the new filesystem on the mount list after root. 371 */ 372 cache_purge(vp); 373 if (!error) { 374 mp->mnt_flag &=~ 375 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 376 mp->mnt_iflag &=~ IMNT_WANTRDWR; 377 vp->v_mountedhere = mp; 378 simple_lock(&mountlist_slock); 379 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 380 simple_unlock(&mountlist_slock); 381 checkdirs(vp); 382 VOP_UNLOCK(vp, 0); 383 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) 384 error = vfs_allocate_syncvnode(mp); 385 vfs_unbusy(mp); 386 (void) VFS_STATVFS(mp, &mp->mnt_stat, p); 387 if ((error = VFS_START(mp, 0, p))) 388 vrele(vp); 389 } else { 390 vp->v_mountedhere = (struct mount *)0; 391 vfs->vfs_refcount--; 392 vfs_unbusy(mp); 393 free(mp, M_MOUNT); 394 vput(vp); 395 } 396 return (error); 397 } 398 399 /* 400 * Scan all active processes to see if any of them have a current 401 * or root directory onto which the new filesystem has just been 402 * mounted. If so, replace them with the new mount point. 403 */ 404 void 405 checkdirs(olddp) 406 struct vnode *olddp; 407 { 408 struct cwdinfo *cwdi; 409 struct vnode *newdp; 410 struct proc *p; 411 412 if (olddp->v_usecount == 1) 413 return; 414 if (VFS_ROOT(olddp->v_mountedhere, &newdp)) 415 panic("mount: lost mount"); 416 proclist_lock_read(); 417 PROCLIST_FOREACH(p, &allproc) { 418 cwdi = p->p_cwdi; 419 if (!cwdi) 420 continue; 421 if (cwdi->cwdi_cdir == olddp) { 422 vrele(cwdi->cwdi_cdir); 423 VREF(newdp); 424 cwdi->cwdi_cdir = newdp; 425 } 426 if (cwdi->cwdi_rdir == olddp) { 427 vrele(cwdi->cwdi_rdir); 428 VREF(newdp); 429 cwdi->cwdi_rdir = newdp; 430 } 431 } 432 proclist_unlock_read(); 433 if (rootvnode == olddp) { 434 vrele(rootvnode); 435 VREF(newdp); 436 rootvnode = newdp; 437 } 438 vput(newdp); 439 } 440 441 /* 442 * Unmount a file system. 443 * 444 * Note: unmount takes a path to the vnode mounted on as argument, 445 * not special file (as before). 446 */ 447 /* ARGSUSED */ 448 int 449 sys_unmount(l, v, retval) 450 struct lwp *l; 451 void *v; 452 register_t *retval; 453 { 454 struct sys_unmount_args /* { 455 syscallarg(const char *) path; 456 syscallarg(int) flags; 457 } */ *uap = v; 458 struct proc *p = l->l_proc; 459 struct vnode *vp; 460 struct mount *mp; 461 int error; 462 struct nameidata nd; 463 464 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 465 SCARG(uap, path), p); 466 if ((error = namei(&nd)) != 0) 467 return (error); 468 vp = nd.ni_vp; 469 mp = vp->v_mount; 470 471 /* 472 * Only root, or the user that did the original mount is 473 * permitted to unmount this filesystem. 474 */ 475 if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) && 476 (error = suser(p->p_ucred, &p->p_acflag)) != 0) { 477 vput(vp); 478 return (error); 479 } 480 481 /* 482 * Don't allow unmounting the root file system. 483 */ 484 if (mp->mnt_flag & MNT_ROOTFS) { 485 vput(vp); 486 return (EINVAL); 487 } 488 489 /* 490 * Must be the root of the filesystem 491 */ 492 if ((vp->v_flag & VROOT) == 0) { 493 vput(vp); 494 return (EINVAL); 495 } 496 vput(vp); 497 498 /* 499 * XXX Freeze syncer. Must do this before locking the 500 * mount point. See dounmount() for details. 501 */ 502 lockmgr(&syncer_lock, LK_EXCLUSIVE, NULL); 503 504 if (vfs_busy(mp, 0, 0)) { 505 lockmgr(&syncer_lock, LK_RELEASE, NULL); 506 return (EBUSY); 507 } 508 509 return (dounmount(mp, SCARG(uap, flags), p)); 510 } 511 512 /* 513 * Do the actual file system unmount. File system is assumed to have been 514 * marked busy by the caller. 515 */ 516 int 517 dounmount(mp, flags, p) 518 struct mount *mp; 519 int flags; 520 struct proc *p; 521 { 522 struct vnode *coveredvp; 523 int error; 524 int async; 525 int used_syncer; 526 527 simple_lock(&mountlist_slock); 528 vfs_unbusy(mp); 529 used_syncer = (mp->mnt_syncer != NULL); 530 531 /* 532 * XXX Syncer must be frozen when we get here. This should really 533 * be done on a per-mountpoint basis, but especially the softdep 534 * code possibly called from the syncer doens't exactly work on a 535 * per-mountpoint basis, so the softdep code would become a maze 536 * of vfs_busy() calls. 537 * 538 * The caller of dounmount() must acquire syncer_lock because 539 * the syncer itself acquires locks in syncer_lock -> vfs_busy 540 * order, and we must preserve that order to avoid deadlock. 541 * 542 * So, if the file system did not use the syncer, now is 543 * the time to release the syncer_lock. 544 */ 545 if (used_syncer == 0) 546 lockmgr(&syncer_lock, LK_RELEASE, NULL); 547 548 mp->mnt_iflag |= IMNT_UNMOUNT; 549 mp->mnt_unmounter = p; 550 lockmgr(&mp->mnt_lock, LK_DRAIN | LK_INTERLOCK, &mountlist_slock); 551 vn_start_write(NULL, &mp, V_WAIT); 552 553 if (mp->mnt_flag & MNT_EXPUBLIC) 554 vfs_setpublicfs(NULL, NULL, NULL); 555 async = mp->mnt_flag & MNT_ASYNC; 556 mp->mnt_flag &= ~MNT_ASYNC; 557 cache_purgevfs(mp); /* remove cache entries for this file sys */ 558 if (mp->mnt_syncer != NULL) 559 vfs_deallocate_syncvnode(mp); 560 error = 0; 561 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 562 #if NFSS > 0 563 error = fss_umount_hook(mp, (flags & MNT_FORCE)); 564 #endif 565 if (error == 0) 566 error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p); 567 } 568 if (error == 0 || (flags & MNT_FORCE)) 569 error = VFS_UNMOUNT(mp, flags, p); 570 vn_finished_write(mp, 0); 571 simple_lock(&mountlist_slock); 572 if (error) { 573 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) 574 (void) vfs_allocate_syncvnode(mp); 575 mp->mnt_iflag &= ~IMNT_UNMOUNT; 576 mp->mnt_unmounter = NULL; 577 mp->mnt_flag |= async; 578 lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK | LK_REENABLE, 579 &mountlist_slock); 580 if (used_syncer) 581 lockmgr(&syncer_lock, LK_RELEASE, NULL); 582 simple_lock(&mp->mnt_slock); 583 while (mp->mnt_wcnt > 0) { 584 wakeup(mp); 585 ltsleep(&mp->mnt_wcnt, PVFS, "mntwcnt1", 586 0, &mp->mnt_slock); 587 } 588 simple_unlock(&mp->mnt_slock); 589 return (error); 590 } 591 CIRCLEQ_REMOVE(&mountlist, mp, mnt_list); 592 if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) { 593 coveredvp->v_mountedhere = NULL; 594 vrele(coveredvp); 595 } 596 mp->mnt_op->vfs_refcount--; 597 if (LIST_FIRST(&mp->mnt_vnodelist) != NULL) 598 panic("unmount: dangling vnode"); 599 mp->mnt_iflag |= IMNT_GONE; 600 lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_slock); 601 if (used_syncer) 602 lockmgr(&syncer_lock, LK_RELEASE, NULL); 603 simple_lock(&mp->mnt_slock); 604 while (mp->mnt_wcnt > 0) { 605 wakeup(mp); 606 ltsleep(&mp->mnt_wcnt, PVFS, "mntwcnt2", 0, &mp->mnt_slock); 607 } 608 simple_unlock(&mp->mnt_slock); 609 free(mp, M_MOUNT); 610 return (0); 611 } 612 613 /* 614 * Sync each mounted filesystem. 615 */ 616 #ifdef DEBUG 617 int syncprt = 0; 618 struct ctldebug debug0 = { "syncprt", &syncprt }; 619 #endif 620 621 /* ARGSUSED */ 622 int 623 sys_sync(l, v, retval) 624 struct lwp *l; 625 void *v; 626 register_t *retval; 627 { 628 struct mount *mp, *nmp; 629 int asyncflag; 630 struct proc *p = l == NULL ? &proc0 : l->l_proc; 631 632 simple_lock(&mountlist_slock); 633 for (mp = mountlist.cqh_last; mp != (void *)&mountlist; mp = nmp) { 634 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 635 nmp = mp->mnt_list.cqe_prev; 636 continue; 637 } 638 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 639 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 640 asyncflag = mp->mnt_flag & MNT_ASYNC; 641 mp->mnt_flag &= ~MNT_ASYNC; 642 VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, p); 643 if (asyncflag) 644 mp->mnt_flag |= MNT_ASYNC; 645 vn_finished_write(mp, 0); 646 } 647 simple_lock(&mountlist_slock); 648 nmp = mp->mnt_list.cqe_prev; 649 vfs_unbusy(mp); 650 651 } 652 simple_unlock(&mountlist_slock); 653 #ifdef DEBUG 654 if (syncprt) 655 vfs_bufstats(); 656 #endif /* DEBUG */ 657 return (0); 658 } 659 660 /* 661 * Change filesystem quotas. 662 */ 663 /* ARGSUSED */ 664 int 665 sys_quotactl(l, v, retval) 666 struct lwp *l; 667 void *v; 668 register_t *retval; 669 { 670 struct sys_quotactl_args /* { 671 syscallarg(const char *) path; 672 syscallarg(int) cmd; 673 syscallarg(int) uid; 674 syscallarg(caddr_t) arg; 675 } */ *uap = v; 676 struct proc *p = l->l_proc; 677 struct mount *mp; 678 int error; 679 struct nameidata nd; 680 681 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 682 if ((error = namei(&nd)) != 0) 683 return (error); 684 error = vn_start_write(nd.ni_vp, &mp, V_WAIT | V_PCATCH); 685 vrele(nd.ni_vp); 686 if (error) 687 return (error); 688 error = VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid), 689 SCARG(uap, arg), p); 690 vn_finished_write(mp, 0); 691 return (error); 692 } 693 694 int 695 dostatvfs(struct mount *mp, struct statvfs *sp, struct proc *p, int flags, 696 int root) 697 { 698 struct cwdinfo *cwdi = p->p_cwdi; 699 int error = 0; 700 701 /* 702 * If MNT_NOWAIT or MNT_LAZY is specified, do not 703 * refresh the fsstat cache. MNT_WAIT or MNT_LAZY 704 * overrides MNT_NOWAIT. 705 */ 706 if (flags == MNT_NOWAIT || flags == MNT_LAZY || 707 (flags != MNT_WAIT && flags != 0)) { 708 memcpy(sp, &mp->mnt_stat, sizeof(*sp)); 709 goto done; 710 } 711 712 /* Get the filesystem stats now */ 713 memset(sp, 0, sizeof(*sp)); 714 if ((error = VFS_STATVFS(mp, sp, p)) != 0) { 715 return error; 716 } 717 718 if (cwdi->cwdi_rdir == NULL) 719 (void)memcpy(&mp->mnt_stat, sp, sizeof(mp->mnt_stat)); 720 done: 721 if (cwdi->cwdi_rdir != NULL) { 722 size_t len; 723 char *bp; 724 char *path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 725 if (!path) 726 return ENOMEM; 727 728 bp = path + MAXPATHLEN; 729 *--bp = '\0'; 730 error = getcwd_common(cwdi->cwdi_rdir, rootvnode, &bp, path, 731 MAXPATHLEN / 2, 0, p); 732 if (error) { 733 free(path, M_TEMP); 734 return error; 735 } 736 len = strlen(bp); 737 /* 738 * for mount points that are below our root, we can see 739 * them, so we fix up the pathname and return them. The 740 * rest we cannot see, so we don't allow viewing the 741 * data. 742 */ 743 if (strncmp(bp, sp->f_mntonname, len) == 0) { 744 strlcpy(sp->f_mntonname, &sp->f_mntonname[len], 745 sizeof(sp->f_mntonname)); 746 if (sp->f_mntonname[0] == '\0') 747 (void)strlcpy(sp->f_mntonname, "/", 748 sizeof(sp->f_mntonname)); 749 } else { 750 if (root) 751 (void)strlcpy(sp->f_mntonname, "/", 752 sizeof(sp->f_mntonname)); 753 else 754 error = EPERM; 755 } 756 free(path, M_TEMP); 757 } 758 sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK; 759 return error; 760 } 761 762 /* 763 * Get filesystem statistics. 764 */ 765 /* ARGSUSED */ 766 int 767 sys_statvfs1(l, v, retval) 768 struct lwp *l; 769 void *v; 770 register_t *retval; 771 { 772 struct sys_statvfs1_args /* { 773 syscallarg(const char *) path; 774 syscallarg(struct statvfs *) buf; 775 syscallarg(int) flags; 776 } */ *uap = v; 777 struct proc *p = l->l_proc; 778 struct mount *mp; 779 struct statvfs sbuf; 780 int error; 781 struct nameidata nd; 782 783 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 784 if ((error = namei(&nd)) != 0) 785 return error; 786 mp = nd.ni_vp->v_mount; 787 vrele(nd.ni_vp); 788 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0) 789 return error; 790 return copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 791 } 792 793 /* 794 * Get filesystem statistics. 795 */ 796 /* ARGSUSED */ 797 int 798 sys_fstatvfs1(l, v, retval) 799 struct lwp *l; 800 void *v; 801 register_t *retval; 802 { 803 struct sys_fstatvfs1_args /* { 804 syscallarg(int) fd; 805 syscallarg(struct statvfs *) buf; 806 syscallarg(int) flags; 807 } */ *uap = v; 808 struct proc *p = l->l_proc; 809 struct file *fp; 810 struct mount *mp; 811 struct statvfs sbuf; 812 int error; 813 814 /* getvnode() will use the descriptor for us */ 815 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 816 return (error); 817 mp = ((struct vnode *)fp->f_data)->v_mount; 818 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0) 819 goto out; 820 error = copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 821 out: 822 FILE_UNUSE(fp, p); 823 return error; 824 } 825 826 827 /* 828 * Get statistics on all filesystems. 829 */ 830 int 831 sys_getvfsstat(l, v, retval) 832 struct lwp *l; 833 void *v; 834 register_t *retval; 835 { 836 struct sys_getvfsstat_args /* { 837 syscallarg(struct statvfs *) buf; 838 syscallarg(size_t) bufsize; 839 syscallarg(int) flags; 840 } */ *uap = v; 841 int root = 0; 842 struct proc *p = l->l_proc; 843 struct mount *mp, *nmp; 844 struct statvfs sbuf; 845 struct statvfs *sfsp; 846 size_t count, maxcount; 847 int error = 0; 848 849 maxcount = SCARG(uap, bufsize) / sizeof(struct statvfs); 850 sfsp = SCARG(uap, buf); 851 simple_lock(&mountlist_slock); 852 count = 0; 853 for (mp = CIRCLEQ_FIRST(&mountlist); mp != (void *)&mountlist; 854 mp = nmp) { 855 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 856 nmp = CIRCLEQ_NEXT(mp, mnt_list); 857 continue; 858 } 859 if (sfsp && count < maxcount) { 860 error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 0); 861 if (error) { 862 simple_lock(&mountlist_slock); 863 nmp = CIRCLEQ_NEXT(mp, mnt_list); 864 vfs_unbusy(mp); 865 continue; 866 } 867 error = copyout(&sbuf, sfsp, sizeof(*sfsp)); 868 if (error) { 869 vfs_unbusy(mp); 870 return (error); 871 } 872 sfsp++; 873 root |= strcmp(sbuf.f_mntonname, "/") == 0; 874 } 875 count++; 876 simple_lock(&mountlist_slock); 877 nmp = CIRCLEQ_NEXT(mp, mnt_list); 878 vfs_unbusy(mp); 879 } 880 simple_unlock(&mountlist_slock); 881 if (root == 0 && p->p_cwdi->cwdi_rdir) { 882 /* 883 * fake a root entry 884 */ 885 if ((error = dostatvfs(p->p_cwdi->cwdi_rdir->v_mount, &sbuf, p, 886 SCARG(uap, flags), 1)) != 0) 887 return error; 888 if (sfsp) 889 error = copyout(&sbuf, sfsp, sizeof(*sfsp)); 890 count++; 891 } 892 if (sfsp && count > maxcount) 893 *retval = maxcount; 894 else 895 *retval = count; 896 return error; 897 } 898 899 /* 900 * Change current working directory to a given file descriptor. 901 */ 902 /* ARGSUSED */ 903 int 904 sys_fchdir(l, v, retval) 905 struct lwp *l; 906 void *v; 907 register_t *retval; 908 { 909 struct sys_fchdir_args /* { 910 syscallarg(int) fd; 911 } */ *uap = v; 912 struct proc *p = l->l_proc; 913 struct filedesc *fdp = p->p_fd; 914 struct cwdinfo *cwdi = p->p_cwdi; 915 struct vnode *vp, *tdp; 916 struct mount *mp; 917 struct file *fp; 918 int error; 919 920 /* getvnode() will use the descriptor for us */ 921 if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0) 922 return (error); 923 vp = (struct vnode *)fp->f_data; 924 925 VREF(vp); 926 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 927 if (vp->v_type != VDIR) 928 error = ENOTDIR; 929 else 930 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); 931 while (!error && (mp = vp->v_mountedhere) != NULL) { 932 if (vfs_busy(mp, 0, 0)) 933 continue; 934 error = VFS_ROOT(mp, &tdp); 935 vfs_unbusy(mp); 936 if (error) 937 break; 938 vput(vp); 939 vp = tdp; 940 } 941 if (error) { 942 vput(vp); 943 goto out; 944 } 945 VOP_UNLOCK(vp, 0); 946 947 /* 948 * Disallow changing to a directory not under the process's 949 * current root directory (if there is one). 950 */ 951 if (cwdi->cwdi_rdir && !vn_isunder(vp, NULL, p)) { 952 vrele(vp); 953 error = EPERM; /* operation not permitted */ 954 goto out; 955 } 956 957 vrele(cwdi->cwdi_cdir); 958 cwdi->cwdi_cdir = vp; 959 out: 960 FILE_UNUSE(fp, p); 961 return (error); 962 } 963 964 /* 965 * Change this process's notion of the root directory to a given file descriptor. 966 */ 967 968 int 969 sys_fchroot(l, v, retval) 970 struct lwp *l; 971 void *v; 972 register_t *retval; 973 { 974 struct sys_fchroot_args *uap = v; 975 struct proc *p = l->l_proc; 976 struct filedesc *fdp = p->p_fd; 977 struct cwdinfo *cwdi = p->p_cwdi; 978 struct vnode *vp; 979 struct file *fp; 980 int error; 981 982 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 983 return error; 984 /* getvnode() will use the descriptor for us */ 985 if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0) 986 return error; 987 vp = (struct vnode *) fp->f_data; 988 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 989 if (vp->v_type != VDIR) 990 error = ENOTDIR; 991 else 992 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); 993 VOP_UNLOCK(vp, 0); 994 if (error) 995 goto out; 996 VREF(vp); 997 998 /* 999 * Prevent escaping from chroot by putting the root under 1000 * the working directory. Silently chdir to / if we aren't 1001 * already there. 1002 */ 1003 if (!vn_isunder(cwdi->cwdi_cdir, vp, p)) { 1004 /* 1005 * XXX would be more failsafe to change directory to a 1006 * deadfs node here instead 1007 */ 1008 vrele(cwdi->cwdi_cdir); 1009 VREF(vp); 1010 cwdi->cwdi_cdir = vp; 1011 } 1012 1013 if (cwdi->cwdi_rdir != NULL) 1014 vrele(cwdi->cwdi_rdir); 1015 cwdi->cwdi_rdir = vp; 1016 out: 1017 FILE_UNUSE(fp, p); 1018 return (error); 1019 } 1020 1021 1022 1023 /* 1024 * Change current working directory (``.''). 1025 */ 1026 /* ARGSUSED */ 1027 int 1028 sys_chdir(l, v, retval) 1029 struct lwp *l; 1030 void *v; 1031 register_t *retval; 1032 { 1033 struct sys_chdir_args /* { 1034 syscallarg(const char *) path; 1035 } */ *uap = v; 1036 struct proc *p = l->l_proc; 1037 struct cwdinfo *cwdi = p->p_cwdi; 1038 int error; 1039 struct nameidata nd; 1040 1041 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1042 SCARG(uap, path), p); 1043 if ((error = change_dir(&nd, p)) != 0) 1044 return (error); 1045 vrele(cwdi->cwdi_cdir); 1046 cwdi->cwdi_cdir = nd.ni_vp; 1047 return (0); 1048 } 1049 1050 /* 1051 * Change notion of root (``/'') directory. 1052 */ 1053 /* ARGSUSED */ 1054 int 1055 sys_chroot(l, v, retval) 1056 struct lwp *l; 1057 void *v; 1058 register_t *retval; 1059 { 1060 struct sys_chroot_args /* { 1061 syscallarg(const char *) path; 1062 } */ *uap = v; 1063 struct proc *p = l->l_proc; 1064 struct cwdinfo *cwdi = p->p_cwdi; 1065 struct vnode *vp; 1066 int error; 1067 struct nameidata nd; 1068 1069 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1070 return (error); 1071 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1072 SCARG(uap, path), p); 1073 if ((error = change_dir(&nd, p)) != 0) 1074 return (error); 1075 if (cwdi->cwdi_rdir != NULL) 1076 vrele(cwdi->cwdi_rdir); 1077 vp = nd.ni_vp; 1078 cwdi->cwdi_rdir = vp; 1079 1080 /* 1081 * Prevent escaping from chroot by putting the root under 1082 * the working directory. Silently chdir to / if we aren't 1083 * already there. 1084 */ 1085 if (!vn_isunder(cwdi->cwdi_cdir, vp, p)) { 1086 /* 1087 * XXX would be more failsafe to change directory to a 1088 * deadfs node here instead 1089 */ 1090 vrele(cwdi->cwdi_cdir); 1091 VREF(vp); 1092 cwdi->cwdi_cdir = vp; 1093 } 1094 1095 return (0); 1096 } 1097 1098 /* 1099 * Common routine for chroot and chdir. 1100 */ 1101 static int 1102 change_dir(ndp, p) 1103 struct nameidata *ndp; 1104 struct proc *p; 1105 { 1106 struct vnode *vp; 1107 int error; 1108 1109 if ((error = namei(ndp)) != 0) 1110 return (error); 1111 vp = ndp->ni_vp; 1112 if (vp->v_type != VDIR) 1113 error = ENOTDIR; 1114 else 1115 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); 1116 1117 if (error) 1118 vput(vp); 1119 else 1120 VOP_UNLOCK(vp, 0); 1121 return (error); 1122 } 1123 1124 /* 1125 * Check permissions, allocate an open file structure, 1126 * and call the device open routine if any. 1127 */ 1128 int 1129 sys_open(l, v, retval) 1130 struct lwp *l; 1131 void *v; 1132 register_t *retval; 1133 { 1134 struct sys_open_args /* { 1135 syscallarg(const char *) path; 1136 syscallarg(int) flags; 1137 syscallarg(int) mode; 1138 } */ *uap = v; 1139 struct proc *p = l->l_proc; 1140 struct cwdinfo *cwdi = p->p_cwdi; 1141 struct filedesc *fdp = p->p_fd; 1142 struct file *fp; 1143 struct vnode *vp; 1144 int flags, cmode; 1145 int type, indx, error; 1146 struct flock lf; 1147 struct nameidata nd; 1148 1149 flags = FFLAGS(SCARG(uap, flags)); 1150 if ((flags & (FREAD | FWRITE)) == 0) 1151 return (EINVAL); 1152 /* falloc() will use the file descriptor for us */ 1153 if ((error = falloc(p, &fp, &indx)) != 0) 1154 return (error); 1155 cmode = ((SCARG(uap, mode) &~ cwdi->cwdi_cmask) & ALLPERMS) &~ S_ISTXT; 1156 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 1157 l->l_dupfd = -indx - 1; /* XXX check for fdopen */ 1158 if ((error = vn_open(&nd, flags, cmode)) != 0) { 1159 FILE_UNUSE(fp, p); 1160 fdp->fd_ofiles[indx] = NULL; 1161 ffree(fp); 1162 if ((error == EDUPFD || error == EMOVEFD) && 1163 l->l_dupfd >= 0 && /* XXX from fdopen */ 1164 (error = 1165 dupfdopen(p, indx, l->l_dupfd, flags, error)) == 0) { 1166 *retval = indx; 1167 return (0); 1168 } 1169 if (error == ERESTART) 1170 error = EINTR; 1171 fdremove(fdp, indx); 1172 return (error); 1173 } 1174 l->l_dupfd = 0; 1175 vp = nd.ni_vp; 1176 fp->f_flag = flags & FMASK; 1177 fp->f_type = DTYPE_VNODE; 1178 fp->f_ops = &vnops; 1179 fp->f_data = vp; 1180 if (flags & (O_EXLOCK | O_SHLOCK)) { 1181 lf.l_whence = SEEK_SET; 1182 lf.l_start = 0; 1183 lf.l_len = 0; 1184 if (flags & O_EXLOCK) 1185 lf.l_type = F_WRLCK; 1186 else 1187 lf.l_type = F_RDLCK; 1188 type = F_FLOCK; 1189 if ((flags & FNONBLOCK) == 0) 1190 type |= F_WAIT; 1191 VOP_UNLOCK(vp, 0); 1192 error = VOP_ADVLOCK(vp, fp, F_SETLK, &lf, type); 1193 if (error) { 1194 (void) vn_close(vp, fp->f_flag, fp->f_cred, p); 1195 FILE_UNUSE(fp, p); 1196 ffree(fp); 1197 fdremove(fdp, indx); 1198 return (error); 1199 } 1200 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1201 fp->f_flag |= FHASLOCK; 1202 } 1203 VOP_UNLOCK(vp, 0); 1204 *retval = indx; 1205 FILE_SET_MATURE(fp); 1206 FILE_UNUSE(fp, p); 1207 return (0); 1208 } 1209 1210 /* 1211 * Get file handle system call 1212 */ 1213 int 1214 sys_getfh(l, v, retval) 1215 struct lwp *l; 1216 void *v; 1217 register_t *retval; 1218 { 1219 struct sys_getfh_args /* { 1220 syscallarg(char *) fname; 1221 syscallarg(fhandle_t *) fhp; 1222 } */ *uap = v; 1223 struct proc *p = l->l_proc; 1224 struct vnode *vp; 1225 fhandle_t fh; 1226 int error; 1227 struct nameidata nd; 1228 1229 /* 1230 * Must be super user 1231 */ 1232 error = suser(p->p_ucred, &p->p_acflag); 1233 if (error) 1234 return (error); 1235 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1236 SCARG(uap, fname), p); 1237 error = namei(&nd); 1238 if (error) 1239 return (error); 1240 vp = nd.ni_vp; 1241 memset(&fh, 0, sizeof(fh)); 1242 fh.fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 1243 error = VFS_VPTOFH(vp, &fh.fh_fid); 1244 vput(vp); 1245 if (error) 1246 return (error); 1247 error = copyout(&fh, (caddr_t)SCARG(uap, fhp), sizeof (fh)); 1248 return (error); 1249 } 1250 1251 /* 1252 * Open a file given a file handle. 1253 * 1254 * Check permissions, allocate an open file structure, 1255 * and call the device open routine if any. 1256 */ 1257 int 1258 sys_fhopen(l, v, retval) 1259 struct lwp *l; 1260 void *v; 1261 register_t *retval; 1262 { 1263 struct sys_fhopen_args /* { 1264 syscallarg(const fhandle_t *) fhp; 1265 syscallarg(int) flags; 1266 } */ *uap = v; 1267 struct proc *p = l->l_proc; 1268 struct filedesc *fdp = p->p_fd; 1269 struct file *fp; 1270 struct vnode *vp = NULL; 1271 struct mount *mp; 1272 struct ucred *cred = p->p_ucred; 1273 int flags; 1274 struct file *nfp; 1275 int type, indx, error=0; 1276 struct flock lf; 1277 struct vattr va; 1278 fhandle_t fh; 1279 1280 /* 1281 * Must be super user 1282 */ 1283 if ((error = suser(p->p_ucred, &p->p_acflag))) 1284 return (error); 1285 1286 flags = FFLAGS(SCARG(uap, flags)); 1287 if ((flags & (FREAD | FWRITE)) == 0) 1288 return (EINVAL); 1289 if ((flags & O_CREAT)) 1290 return (EINVAL); 1291 /* falloc() will use the file descriptor for us */ 1292 if ((error = falloc(p, &nfp, &indx)) != 0) 1293 return (error); 1294 fp = nfp; 1295 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1296 goto bad; 1297 1298 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) { 1299 error = ESTALE; 1300 goto bad; 1301 } 1302 1303 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)) != 0) { 1304 vp = NULL; /* most likely unnecessary sanity for bad: */ 1305 goto bad; 1306 } 1307 1308 /* Now do an effective vn_open */ 1309 1310 if (vp->v_type == VSOCK) { 1311 error = EOPNOTSUPP; 1312 goto bad; 1313 } 1314 if (flags & FREAD) { 1315 if ((error = VOP_ACCESS(vp, VREAD, cred, p)) != 0) 1316 goto bad; 1317 } 1318 if (flags & (FWRITE | O_TRUNC)) { 1319 if (vp->v_type == VDIR) { 1320 error = EISDIR; 1321 goto bad; 1322 } 1323 if ((error = vn_writechk(vp)) != 0 || 1324 (error = VOP_ACCESS(vp, VWRITE, cred, p)) != 0) 1325 goto bad; 1326 } 1327 if (flags & O_TRUNC) { 1328 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 1329 goto bad; 1330 VOP_UNLOCK(vp, 0); /* XXX */ 1331 VOP_LEASE(vp, p, cred, LEASE_WRITE); 1332 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); /* XXX */ 1333 VATTR_NULL(&va); 1334 va.va_size = 0; 1335 error = VOP_SETATTR(vp, &va, cred, p); 1336 vn_finished_write(mp, 0); 1337 if (error) 1338 goto bad; 1339 } 1340 if ((error = VOP_OPEN(vp, flags, cred, p)) != 0) 1341 goto bad; 1342 if (vp->v_type == VREG && 1343 uvn_attach(vp, flags & FWRITE ? VM_PROT_WRITE : 0) == NULL) { 1344 error = EIO; 1345 goto bad; 1346 } 1347 if (flags & FWRITE) 1348 vp->v_writecount++; 1349 1350 /* done with modified vn_open, now finish what sys_open does. */ 1351 1352 fp->f_flag = flags & FMASK; 1353 fp->f_type = DTYPE_VNODE; 1354 fp->f_ops = &vnops; 1355 fp->f_data = vp; 1356 if (flags & (O_EXLOCK | O_SHLOCK)) { 1357 lf.l_whence = SEEK_SET; 1358 lf.l_start = 0; 1359 lf.l_len = 0; 1360 if (flags & O_EXLOCK) 1361 lf.l_type = F_WRLCK; 1362 else 1363 lf.l_type = F_RDLCK; 1364 type = F_FLOCK; 1365 if ((flags & FNONBLOCK) == 0) 1366 type |= F_WAIT; 1367 VOP_UNLOCK(vp, 0); 1368 error = VOP_ADVLOCK(vp, fp, F_SETLK, &lf, type); 1369 if (error) { 1370 (void) vn_close(vp, fp->f_flag, fp->f_cred, p); 1371 FILE_UNUSE(fp, p); 1372 ffree(fp); 1373 fdremove(fdp, indx); 1374 return (error); 1375 } 1376 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1377 fp->f_flag |= FHASLOCK; 1378 } 1379 VOP_UNLOCK(vp, 0); 1380 *retval = indx; 1381 FILE_SET_MATURE(fp); 1382 FILE_UNUSE(fp, p); 1383 return (0); 1384 1385 bad: 1386 FILE_UNUSE(fp, p); 1387 ffree(fp); 1388 fdremove(fdp, indx); 1389 if (vp != NULL) 1390 vput(vp); 1391 return (error); 1392 } 1393 1394 /* ARGSUSED */ 1395 int 1396 sys_fhstat(l, v, retval) 1397 struct lwp *l; 1398 void *v; 1399 register_t *retval; 1400 { 1401 struct sys_fhstat_args /* { 1402 syscallarg(const fhandle_t *) fhp; 1403 syscallarg(struct stat *) sb; 1404 } */ *uap = v; 1405 struct proc *p = l->l_proc; 1406 struct stat sb; 1407 int error; 1408 fhandle_t fh; 1409 struct mount *mp; 1410 struct vnode *vp; 1411 1412 /* 1413 * Must be super user 1414 */ 1415 if ((error = suser(p->p_ucred, &p->p_acflag))) 1416 return (error); 1417 1418 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1419 return (error); 1420 1421 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) 1422 return (ESTALE); 1423 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp))) 1424 return (error); 1425 error = vn_stat(vp, &sb, p); 1426 vput(vp); 1427 if (error) 1428 return (error); 1429 error = copyout(&sb, SCARG(uap, sb), sizeof(sb)); 1430 return (error); 1431 } 1432 1433 /* ARGSUSED */ 1434 int 1435 sys_fhstatvfs1(l, v, retval) 1436 struct lwp *l; 1437 void *v; 1438 register_t *retval; 1439 { 1440 struct sys_fhstatvfs1_args /* 1441 syscallarg(const fhandle_t *) fhp; 1442 syscallarg(struct statvfs *) buf; 1443 syscallarg(int) flags; 1444 } */ *uap = v; 1445 struct proc *p = l->l_proc; 1446 struct statvfs sbuf; 1447 fhandle_t fh; 1448 struct mount *mp; 1449 struct vnode *vp; 1450 int error; 1451 1452 /* 1453 * Must be super user 1454 */ 1455 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1456 return error; 1457 1458 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1459 return error; 1460 1461 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) 1462 return ESTALE; 1463 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp))) 1464 return error; 1465 1466 mp = vp->v_mount; 1467 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0) { 1468 vput(vp); 1469 return error; 1470 } 1471 vput(vp); 1472 return copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 1473 } 1474 1475 /* 1476 * Create a special file. 1477 */ 1478 /* ARGSUSED */ 1479 int 1480 sys_mknod(l, v, retval) 1481 struct lwp *l; 1482 void *v; 1483 register_t *retval; 1484 { 1485 struct sys_mknod_args /* { 1486 syscallarg(const char *) path; 1487 syscallarg(int) mode; 1488 syscallarg(int) dev; 1489 } */ *uap = v; 1490 struct proc *p = l->l_proc; 1491 struct vnode *vp; 1492 struct mount *mp; 1493 struct vattr vattr; 1494 int error; 1495 int whiteout = 0; 1496 struct nameidata nd; 1497 1498 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1499 return (error); 1500 restart: 1501 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p); 1502 if ((error = namei(&nd)) != 0) 1503 return (error); 1504 vp = nd.ni_vp; 1505 if (vp != NULL) 1506 error = EEXIST; 1507 else { 1508 VATTR_NULL(&vattr); 1509 vattr.va_mode = 1510 (SCARG(uap, mode) & ALLPERMS) &~ p->p_cwdi->cwdi_cmask; 1511 vattr.va_rdev = SCARG(uap, dev); 1512 whiteout = 0; 1513 1514 switch (SCARG(uap, mode) & S_IFMT) { 1515 case S_IFMT: /* used by badsect to flag bad sectors */ 1516 vattr.va_type = VBAD; 1517 break; 1518 case S_IFCHR: 1519 vattr.va_type = VCHR; 1520 break; 1521 case S_IFBLK: 1522 vattr.va_type = VBLK; 1523 break; 1524 case S_IFWHT: 1525 whiteout = 1; 1526 break; 1527 default: 1528 error = EINVAL; 1529 break; 1530 } 1531 } 1532 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1533 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1534 if (nd.ni_dvp == vp) 1535 vrele(nd.ni_dvp); 1536 else 1537 vput(nd.ni_dvp); 1538 if (vp) 1539 vrele(vp); 1540 if ((error = vn_start_write(NULL, &mp, 1541 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1542 return (error); 1543 goto restart; 1544 } 1545 if (!error) { 1546 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1547 if (whiteout) { 1548 error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE); 1549 if (error) 1550 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1551 vput(nd.ni_dvp); 1552 } else { 1553 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, 1554 &nd.ni_cnd, &vattr); 1555 if (error == 0) 1556 vput(nd.ni_vp); 1557 } 1558 } else { 1559 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1560 if (nd.ni_dvp == vp) 1561 vrele(nd.ni_dvp); 1562 else 1563 vput(nd.ni_dvp); 1564 if (vp) 1565 vrele(vp); 1566 } 1567 vn_finished_write(mp, 0); 1568 return (error); 1569 } 1570 1571 /* 1572 * Create a named pipe. 1573 */ 1574 /* ARGSUSED */ 1575 int 1576 sys_mkfifo(l, v, retval) 1577 struct lwp *l; 1578 void *v; 1579 register_t *retval; 1580 { 1581 struct sys_mkfifo_args /* { 1582 syscallarg(const char *) path; 1583 syscallarg(int) mode; 1584 } */ *uap = v; 1585 struct proc *p = l->l_proc; 1586 struct mount *mp; 1587 struct vattr vattr; 1588 int error; 1589 struct nameidata nd; 1590 1591 restart: 1592 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p); 1593 if ((error = namei(&nd)) != 0) 1594 return (error); 1595 if (nd.ni_vp != NULL) { 1596 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1597 if (nd.ni_dvp == nd.ni_vp) 1598 vrele(nd.ni_dvp); 1599 else 1600 vput(nd.ni_dvp); 1601 vrele(nd.ni_vp); 1602 return (EEXIST); 1603 } 1604 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1605 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1606 if (nd.ni_dvp == nd.ni_vp) 1607 vrele(nd.ni_dvp); 1608 else 1609 vput(nd.ni_dvp); 1610 if (nd.ni_vp) 1611 vrele(nd.ni_vp); 1612 if ((error = vn_start_write(NULL, &mp, 1613 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1614 return (error); 1615 goto restart; 1616 } 1617 VATTR_NULL(&vattr); 1618 vattr.va_type = VFIFO; 1619 vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_cwdi->cwdi_cmask; 1620 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1621 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); 1622 if (error == 0) 1623 vput(nd.ni_vp); 1624 vn_finished_write(mp, 0); 1625 return (error); 1626 } 1627 1628 /* 1629 * Make a hard file link. 1630 */ 1631 /* ARGSUSED */ 1632 int 1633 sys_link(l, v, retval) 1634 struct lwp *l; 1635 void *v; 1636 register_t *retval; 1637 { 1638 struct sys_link_args /* { 1639 syscallarg(const char *) path; 1640 syscallarg(const char *) link; 1641 } */ *uap = v; 1642 struct proc *p = l->l_proc; 1643 struct vnode *vp; 1644 struct mount *mp; 1645 struct nameidata nd; 1646 int error; 1647 1648 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 1649 if ((error = namei(&nd)) != 0) 1650 return (error); 1651 vp = nd.ni_vp; 1652 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 1653 vrele(vp); 1654 return (error); 1655 } 1656 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p); 1657 if ((error = namei(&nd)) != 0) 1658 goto out; 1659 if (nd.ni_vp) { 1660 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1661 if (nd.ni_dvp == nd.ni_vp) 1662 vrele(nd.ni_dvp); 1663 else 1664 vput(nd.ni_dvp); 1665 vrele(nd.ni_vp); 1666 error = EEXIST; 1667 goto out; 1668 } 1669 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1670 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 1671 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 1672 out: 1673 vrele(vp); 1674 vn_finished_write(mp, 0); 1675 return (error); 1676 } 1677 1678 /* 1679 * Make a symbolic link. 1680 */ 1681 /* ARGSUSED */ 1682 int 1683 sys_symlink(l, v, retval) 1684 struct lwp *l; 1685 void *v; 1686 register_t *retval; 1687 { 1688 struct sys_symlink_args /* { 1689 syscallarg(const char *) path; 1690 syscallarg(const char *) link; 1691 } */ *uap = v; 1692 struct proc *p = l->l_proc; 1693 struct mount *mp; 1694 struct vattr vattr; 1695 char *path; 1696 int error; 1697 struct nameidata nd; 1698 1699 path = PNBUF_GET(); 1700 error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL); 1701 if (error) 1702 goto out; 1703 restart: 1704 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p); 1705 if ((error = namei(&nd)) != 0) 1706 goto out; 1707 if (nd.ni_vp) { 1708 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1709 if (nd.ni_dvp == nd.ni_vp) 1710 vrele(nd.ni_dvp); 1711 else 1712 vput(nd.ni_dvp); 1713 vrele(nd.ni_vp); 1714 error = EEXIST; 1715 goto out; 1716 } 1717 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1718 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1719 if (nd.ni_dvp == nd.ni_vp) 1720 vrele(nd.ni_dvp); 1721 else 1722 vput(nd.ni_dvp); 1723 if ((error = vn_start_write(NULL, &mp, 1724 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1725 return (error); 1726 goto restart; 1727 } 1728 VATTR_NULL(&vattr); 1729 vattr.va_mode = ACCESSPERMS &~ p->p_cwdi->cwdi_cmask; 1730 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1731 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path); 1732 if (error == 0) 1733 vput(nd.ni_vp); 1734 vn_finished_write(mp, 0); 1735 out: 1736 PNBUF_PUT(path); 1737 return (error); 1738 } 1739 1740 /* 1741 * Delete a whiteout from the filesystem. 1742 */ 1743 /* ARGSUSED */ 1744 int 1745 sys_undelete(l, v, retval) 1746 struct lwp *l; 1747 void *v; 1748 register_t *retval; 1749 { 1750 struct sys_undelete_args /* { 1751 syscallarg(const char *) path; 1752 } */ *uap = v; 1753 struct proc *p = l->l_proc; 1754 int error; 1755 struct mount *mp; 1756 struct nameidata nd; 1757 1758 restart: 1759 NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE, 1760 SCARG(uap, path), p); 1761 error = namei(&nd); 1762 if (error) 1763 return (error); 1764 1765 if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) { 1766 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1767 if (nd.ni_dvp == nd.ni_vp) 1768 vrele(nd.ni_dvp); 1769 else 1770 vput(nd.ni_dvp); 1771 if (nd.ni_vp) 1772 vrele(nd.ni_vp); 1773 return (EEXIST); 1774 } 1775 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1776 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1777 if (nd.ni_dvp == nd.ni_vp) 1778 vrele(nd.ni_dvp); 1779 else 1780 vput(nd.ni_dvp); 1781 if ((error = vn_start_write(NULL, &mp, 1782 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1783 return (error); 1784 goto restart; 1785 } 1786 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1787 if ((error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE)) != 0) 1788 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1789 vput(nd.ni_dvp); 1790 vn_finished_write(mp, 0); 1791 return (error); 1792 } 1793 1794 /* 1795 * Delete a name from the filesystem. 1796 */ 1797 /* ARGSUSED */ 1798 int 1799 sys_unlink(l, v, retval) 1800 struct lwp *l; 1801 void *v; 1802 register_t *retval; 1803 { 1804 struct sys_unlink_args /* { 1805 syscallarg(const char *) path; 1806 } */ *uap = v; 1807 struct proc *p = l->l_proc; 1808 struct mount *mp; 1809 struct vnode *vp; 1810 int error; 1811 struct nameidata nd; 1812 1813 restart: 1814 NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE, 1815 SCARG(uap, path), p); 1816 if ((error = namei(&nd)) != 0) 1817 return (error); 1818 vp = nd.ni_vp; 1819 1820 /* 1821 * The root of a mounted filesystem cannot be deleted. 1822 */ 1823 if (vp->v_flag & VROOT) { 1824 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1825 if (nd.ni_dvp == vp) 1826 vrele(nd.ni_dvp); 1827 else 1828 vput(nd.ni_dvp); 1829 vput(vp); 1830 error = EBUSY; 1831 goto out; 1832 } 1833 1834 /* 1835 * Remove the fingerprint from the list if there was one. 1836 */ 1837 #ifdef VERIFIED_EXEC 1838 if ((error = veriexec_removechk(p, vp, nd.ni_dirp)) != 0) { 1839 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1840 if (nd.ni_dvp == vp) 1841 vrele(nd.ni_dvp); 1842 else 1843 vput(nd.ni_dvp); 1844 vput(vp); 1845 goto out; 1846 } 1847 #endif 1848 1849 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1850 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1851 if (nd.ni_dvp == vp) 1852 vrele(nd.ni_dvp); 1853 else 1854 vput(nd.ni_dvp); 1855 vput(vp); 1856 if ((error = vn_start_write(NULL, &mp, 1857 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1858 return (error); 1859 goto restart; 1860 } 1861 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1862 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 1863 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1864 vn_finished_write(mp, 0); 1865 out: 1866 return (error); 1867 } 1868 1869 /* 1870 * Reposition read/write file offset. 1871 */ 1872 int 1873 sys_lseek(l, v, retval) 1874 struct lwp *l; 1875 void *v; 1876 register_t *retval; 1877 { 1878 struct sys_lseek_args /* { 1879 syscallarg(int) fd; 1880 syscallarg(int) pad; 1881 syscallarg(off_t) offset; 1882 syscallarg(int) whence; 1883 } */ *uap = v; 1884 struct proc *p = l->l_proc; 1885 struct ucred *cred = p->p_ucred; 1886 struct filedesc *fdp = p->p_fd; 1887 struct file *fp; 1888 struct vnode *vp; 1889 struct vattr vattr; 1890 off_t newoff; 1891 int error; 1892 1893 if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL) 1894 return (EBADF); 1895 1896 FILE_USE(fp); 1897 1898 vp = (struct vnode *)fp->f_data; 1899 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 1900 error = ESPIPE; 1901 goto out; 1902 } 1903 1904 switch (SCARG(uap, whence)) { 1905 case SEEK_CUR: 1906 newoff = fp->f_offset + SCARG(uap, offset); 1907 break; 1908 case SEEK_END: 1909 error = VOP_GETATTR(vp, &vattr, cred, p); 1910 if (error) 1911 goto out; 1912 newoff = SCARG(uap, offset) + vattr.va_size; 1913 break; 1914 case SEEK_SET: 1915 newoff = SCARG(uap, offset); 1916 break; 1917 default: 1918 error = EINVAL; 1919 goto out; 1920 } 1921 if ((error = VOP_SEEK(vp, fp->f_offset, newoff, cred)) != 0) 1922 goto out; 1923 1924 *(off_t *)retval = fp->f_offset = newoff; 1925 out: 1926 FILE_UNUSE(fp, p); 1927 return (error); 1928 } 1929 1930 /* 1931 * Positional read system call. 1932 */ 1933 int 1934 sys_pread(l, v, retval) 1935 struct lwp *l; 1936 void *v; 1937 register_t *retval; 1938 { 1939 struct sys_pread_args /* { 1940 syscallarg(int) fd; 1941 syscallarg(void *) buf; 1942 syscallarg(size_t) nbyte; 1943 syscallarg(off_t) offset; 1944 } */ *uap = v; 1945 struct proc *p = l->l_proc; 1946 struct filedesc *fdp = p->p_fd; 1947 struct file *fp; 1948 struct vnode *vp; 1949 off_t offset; 1950 int error, fd = SCARG(uap, fd); 1951 1952 if ((fp = fd_getfile(fdp, fd)) == NULL) 1953 return (EBADF); 1954 1955 if ((fp->f_flag & FREAD) == 0) { 1956 simple_unlock(&fp->f_slock); 1957 return (EBADF); 1958 } 1959 1960 FILE_USE(fp); 1961 1962 vp = (struct vnode *)fp->f_data; 1963 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 1964 error = ESPIPE; 1965 goto out; 1966 } 1967 1968 offset = SCARG(uap, offset); 1969 1970 /* 1971 * XXX This works because no file systems actually 1972 * XXX take any action on the seek operation. 1973 */ 1974 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 1975 goto out; 1976 1977 /* dofileread() will unuse the descriptor for us */ 1978 return (dofileread(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte), 1979 &offset, 0, retval)); 1980 1981 out: 1982 FILE_UNUSE(fp, p); 1983 return (error); 1984 } 1985 1986 /* 1987 * Positional scatter read system call. 1988 */ 1989 int 1990 sys_preadv(l, v, retval) 1991 struct lwp *l; 1992 void *v; 1993 register_t *retval; 1994 { 1995 struct sys_preadv_args /* { 1996 syscallarg(int) fd; 1997 syscallarg(const struct iovec *) iovp; 1998 syscallarg(int) iovcnt; 1999 syscallarg(off_t) offset; 2000 } */ *uap = v; 2001 struct proc *p = l->l_proc; 2002 struct filedesc *fdp = p->p_fd; 2003 struct file *fp; 2004 struct vnode *vp; 2005 off_t offset; 2006 int error, fd = SCARG(uap, fd); 2007 2008 if ((fp = fd_getfile(fdp, fd)) == NULL) 2009 return (EBADF); 2010 2011 if ((fp->f_flag & FREAD) == 0) { 2012 simple_unlock(&fp->f_slock); 2013 return (EBADF); 2014 } 2015 2016 FILE_USE(fp); 2017 2018 vp = (struct vnode *)fp->f_data; 2019 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 2020 error = ESPIPE; 2021 goto out; 2022 } 2023 2024 offset = SCARG(uap, offset); 2025 2026 /* 2027 * XXX This works because no file systems actually 2028 * XXX take any action on the seek operation. 2029 */ 2030 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 2031 goto out; 2032 2033 /* dofilereadv() will unuse the descriptor for us */ 2034 return (dofilereadv(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt), 2035 &offset, 0, retval)); 2036 2037 out: 2038 FILE_UNUSE(fp, p); 2039 return (error); 2040 } 2041 2042 /* 2043 * Positional write system call. 2044 */ 2045 int 2046 sys_pwrite(l, v, retval) 2047 struct lwp *l; 2048 void *v; 2049 register_t *retval; 2050 { 2051 struct sys_pwrite_args /* { 2052 syscallarg(int) fd; 2053 syscallarg(const void *) buf; 2054 syscallarg(size_t) nbyte; 2055 syscallarg(off_t) offset; 2056 } */ *uap = v; 2057 struct proc *p = l->l_proc; 2058 struct filedesc *fdp = p->p_fd; 2059 struct file *fp; 2060 struct vnode *vp; 2061 off_t offset; 2062 int error, fd = SCARG(uap, fd); 2063 2064 if ((fp = fd_getfile(fdp, fd)) == NULL) 2065 return (EBADF); 2066 2067 if ((fp->f_flag & FWRITE) == 0) { 2068 simple_unlock(&fp->f_slock); 2069 return (EBADF); 2070 } 2071 2072 FILE_USE(fp); 2073 2074 vp = (struct vnode *)fp->f_data; 2075 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 2076 error = ESPIPE; 2077 goto out; 2078 } 2079 2080 offset = SCARG(uap, offset); 2081 2082 /* 2083 * XXX This works because no file systems actually 2084 * XXX take any action on the seek operation. 2085 */ 2086 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 2087 goto out; 2088 2089 /* dofilewrite() will unuse the descriptor for us */ 2090 return (dofilewrite(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte), 2091 &offset, 0, retval)); 2092 2093 out: 2094 FILE_UNUSE(fp, p); 2095 return (error); 2096 } 2097 2098 /* 2099 * Positional gather write system call. 2100 */ 2101 int 2102 sys_pwritev(l, v, retval) 2103 struct lwp *l; 2104 void *v; 2105 register_t *retval; 2106 { 2107 struct sys_pwritev_args /* { 2108 syscallarg(int) fd; 2109 syscallarg(const struct iovec *) iovp; 2110 syscallarg(int) iovcnt; 2111 syscallarg(off_t) offset; 2112 } */ *uap = v; 2113 struct proc *p = l->l_proc; 2114 struct filedesc *fdp = p->p_fd; 2115 struct file *fp; 2116 struct vnode *vp; 2117 off_t offset; 2118 int error, fd = SCARG(uap, fd); 2119 2120 if ((fp = fd_getfile(fdp, fd)) == NULL) 2121 return (EBADF); 2122 2123 if ((fp->f_flag & FWRITE) == 0) { 2124 simple_unlock(&fp->f_slock); 2125 return (EBADF); 2126 } 2127 2128 FILE_USE(fp); 2129 2130 vp = (struct vnode *)fp->f_data; 2131 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 2132 error = ESPIPE; 2133 goto out; 2134 } 2135 2136 offset = SCARG(uap, offset); 2137 2138 /* 2139 * XXX This works because no file systems actually 2140 * XXX take any action on the seek operation. 2141 */ 2142 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 2143 goto out; 2144 2145 /* dofilewritev() will unuse the descriptor for us */ 2146 return (dofilewritev(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt), 2147 &offset, 0, retval)); 2148 2149 out: 2150 FILE_UNUSE(fp, p); 2151 return (error); 2152 } 2153 2154 /* 2155 * Check access permissions. 2156 */ 2157 int 2158 sys_access(l, v, retval) 2159 struct lwp *l; 2160 void *v; 2161 register_t *retval; 2162 { 2163 struct sys_access_args /* { 2164 syscallarg(const char *) path; 2165 syscallarg(int) flags; 2166 } */ *uap = v; 2167 struct proc *p = l->l_proc; 2168 struct ucred *cred; 2169 struct vnode *vp; 2170 int error, flags; 2171 struct nameidata nd; 2172 2173 cred = crdup(p->p_ucred); 2174 cred->cr_uid = p->p_cred->p_ruid; 2175 cred->cr_gid = p->p_cred->p_rgid; 2176 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2177 SCARG(uap, path), p); 2178 /* Override default credentials */ 2179 nd.ni_cnd.cn_cred = cred; 2180 if ((error = namei(&nd)) != 0) 2181 goto out; 2182 vp = nd.ni_vp; 2183 2184 /* Flags == 0 means only check for existence. */ 2185 if (SCARG(uap, flags)) { 2186 flags = 0; 2187 if (SCARG(uap, flags) & R_OK) 2188 flags |= VREAD; 2189 if (SCARG(uap, flags) & W_OK) 2190 flags |= VWRITE; 2191 if (SCARG(uap, flags) & X_OK) 2192 flags |= VEXEC; 2193 2194 error = VOP_ACCESS(vp, flags, cred, p); 2195 if (!error && (flags & VWRITE)) 2196 error = vn_writechk(vp); 2197 } 2198 vput(vp); 2199 out: 2200 crfree(cred); 2201 return (error); 2202 } 2203 2204 /* 2205 * Get file status; this version follows links. 2206 */ 2207 /* ARGSUSED */ 2208 int 2209 sys___stat13(l, v, retval) 2210 struct lwp *l; 2211 void *v; 2212 register_t *retval; 2213 { 2214 struct sys___stat13_args /* { 2215 syscallarg(const char *) path; 2216 syscallarg(struct stat *) ub; 2217 } */ *uap = v; 2218 struct proc *p = l->l_proc; 2219 struct stat sb; 2220 int error; 2221 struct nameidata nd; 2222 2223 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2224 SCARG(uap, path), p); 2225 if ((error = namei(&nd)) != 0) 2226 return (error); 2227 error = vn_stat(nd.ni_vp, &sb, p); 2228 vput(nd.ni_vp); 2229 if (error) 2230 return (error); 2231 error = copyout(&sb, SCARG(uap, ub), sizeof(sb)); 2232 return (error); 2233 } 2234 2235 /* 2236 * Get file status; this version does not follow links. 2237 */ 2238 /* ARGSUSED */ 2239 int 2240 sys___lstat13(l, v, retval) 2241 struct lwp *l; 2242 void *v; 2243 register_t *retval; 2244 { 2245 struct sys___lstat13_args /* { 2246 syscallarg(const char *) path; 2247 syscallarg(struct stat *) ub; 2248 } */ *uap = v; 2249 struct proc *p = l->l_proc; 2250 struct stat sb; 2251 int error; 2252 struct nameidata nd; 2253 2254 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, 2255 SCARG(uap, path), p); 2256 if ((error = namei(&nd)) != 0) 2257 return (error); 2258 error = vn_stat(nd.ni_vp, &sb, p); 2259 vput(nd.ni_vp); 2260 if (error) 2261 return (error); 2262 error = copyout(&sb, SCARG(uap, ub), sizeof(sb)); 2263 return (error); 2264 } 2265 2266 /* 2267 * Get configurable pathname variables. 2268 */ 2269 /* ARGSUSED */ 2270 int 2271 sys_pathconf(l, v, retval) 2272 struct lwp *l; 2273 void *v; 2274 register_t *retval; 2275 { 2276 struct sys_pathconf_args /* { 2277 syscallarg(const char *) path; 2278 syscallarg(int) name; 2279 } */ *uap = v; 2280 struct proc *p = l->l_proc; 2281 int error; 2282 struct nameidata nd; 2283 2284 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2285 SCARG(uap, path), p); 2286 if ((error = namei(&nd)) != 0) 2287 return (error); 2288 error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), retval); 2289 vput(nd.ni_vp); 2290 return (error); 2291 } 2292 2293 /* 2294 * Return target name of a symbolic link. 2295 */ 2296 /* ARGSUSED */ 2297 int 2298 sys_readlink(l, v, retval) 2299 struct lwp *l; 2300 void *v; 2301 register_t *retval; 2302 { 2303 struct sys_readlink_args /* { 2304 syscallarg(const char *) path; 2305 syscallarg(char *) buf; 2306 syscallarg(size_t) count; 2307 } */ *uap = v; 2308 struct proc *p = l->l_proc; 2309 struct vnode *vp; 2310 struct iovec aiov; 2311 struct uio auio; 2312 int error; 2313 struct nameidata nd; 2314 2315 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, 2316 SCARG(uap, path), p); 2317 if ((error = namei(&nd)) != 0) 2318 return (error); 2319 vp = nd.ni_vp; 2320 if (vp->v_type != VLNK) 2321 error = EINVAL; 2322 else if (!(vp->v_mount->mnt_flag & MNT_SYMPERM) || 2323 (error = VOP_ACCESS(vp, VREAD, p->p_ucred, p)) == 0) { 2324 aiov.iov_base = SCARG(uap, buf); 2325 aiov.iov_len = SCARG(uap, count); 2326 auio.uio_iov = &aiov; 2327 auio.uio_iovcnt = 1; 2328 auio.uio_offset = 0; 2329 auio.uio_rw = UIO_READ; 2330 auio.uio_segflg = UIO_USERSPACE; 2331 auio.uio_procp = p; 2332 auio.uio_resid = SCARG(uap, count); 2333 error = VOP_READLINK(vp, &auio, p->p_ucred); 2334 } 2335 vput(vp); 2336 *retval = SCARG(uap, count) - auio.uio_resid; 2337 return (error); 2338 } 2339 2340 /* 2341 * Change flags of a file given a path name. 2342 */ 2343 /* ARGSUSED */ 2344 int 2345 sys_chflags(l, v, retval) 2346 struct lwp *l; 2347 void *v; 2348 register_t *retval; 2349 { 2350 struct sys_chflags_args /* { 2351 syscallarg(const char *) path; 2352 syscallarg(u_long) flags; 2353 } */ *uap = v; 2354 struct proc *p = l->l_proc; 2355 struct vnode *vp; 2356 int error; 2357 struct nameidata nd; 2358 2359 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2360 if ((error = namei(&nd)) != 0) 2361 return (error); 2362 vp = nd.ni_vp; 2363 error = change_flags(vp, SCARG(uap, flags), p); 2364 vput(vp); 2365 return (error); 2366 } 2367 2368 /* 2369 * Change flags of a file given a file descriptor. 2370 */ 2371 /* ARGSUSED */ 2372 int 2373 sys_fchflags(l, v, retval) 2374 struct lwp *l; 2375 void *v; 2376 register_t *retval; 2377 { 2378 struct sys_fchflags_args /* { 2379 syscallarg(int) fd; 2380 syscallarg(u_long) flags; 2381 } */ *uap = v; 2382 struct proc *p = l->l_proc; 2383 struct vnode *vp; 2384 struct file *fp; 2385 int error; 2386 2387 /* getvnode() will use the descriptor for us */ 2388 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2389 return (error); 2390 vp = (struct vnode *)fp->f_data; 2391 error = change_flags(vp, SCARG(uap, flags), p); 2392 VOP_UNLOCK(vp, 0); 2393 FILE_UNUSE(fp, p); 2394 return (error); 2395 } 2396 2397 /* 2398 * Change flags of a file given a path name; this version does 2399 * not follow links. 2400 */ 2401 int 2402 sys_lchflags(l, v, retval) 2403 struct lwp *l; 2404 void *v; 2405 register_t *retval; 2406 { 2407 struct sys_lchflags_args /* { 2408 syscallarg(const char *) path; 2409 syscallarg(u_long) flags; 2410 } */ *uap = v; 2411 struct proc *p = l->l_proc; 2412 struct vnode *vp; 2413 int error; 2414 struct nameidata nd; 2415 2416 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2417 if ((error = namei(&nd)) != 0) 2418 return (error); 2419 vp = nd.ni_vp; 2420 error = change_flags(vp, SCARG(uap, flags), p); 2421 vput(vp); 2422 return (error); 2423 } 2424 2425 /* 2426 * Common routine to change flags of a file. 2427 */ 2428 int 2429 change_flags(vp, flags, p) 2430 struct vnode *vp; 2431 u_long flags; 2432 struct proc *p; 2433 { 2434 struct mount *mp; 2435 struct vattr vattr; 2436 int error; 2437 2438 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2439 return (error); 2440 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2441 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2442 /* 2443 * Non-superusers cannot change the flags on devices, even if they 2444 * own them. 2445 */ 2446 if (suser(p->p_ucred, &p->p_acflag) != 0) { 2447 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0) 2448 goto out; 2449 if (vattr.va_type == VCHR || vattr.va_type == VBLK) { 2450 error = EINVAL; 2451 goto out; 2452 } 2453 } 2454 VATTR_NULL(&vattr); 2455 vattr.va_flags = flags; 2456 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2457 out: 2458 vn_finished_write(mp, 0); 2459 return (error); 2460 } 2461 2462 /* 2463 * Change mode of a file given path name; this version follows links. 2464 */ 2465 /* ARGSUSED */ 2466 int 2467 sys_chmod(l, v, retval) 2468 struct lwp *l; 2469 void *v; 2470 register_t *retval; 2471 { 2472 struct sys_chmod_args /* { 2473 syscallarg(const char *) path; 2474 syscallarg(int) mode; 2475 } */ *uap = v; 2476 struct proc *p = l->l_proc; 2477 int error; 2478 struct nameidata nd; 2479 2480 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2481 if ((error = namei(&nd)) != 0) 2482 return (error); 2483 2484 error = change_mode(nd.ni_vp, SCARG(uap, mode), p); 2485 2486 vrele(nd.ni_vp); 2487 return (error); 2488 } 2489 2490 /* 2491 * Change mode of a file given a file descriptor. 2492 */ 2493 /* ARGSUSED */ 2494 int 2495 sys_fchmod(l, v, retval) 2496 struct lwp *l; 2497 void *v; 2498 register_t *retval; 2499 { 2500 struct sys_fchmod_args /* { 2501 syscallarg(int) fd; 2502 syscallarg(int) mode; 2503 } */ *uap = v; 2504 struct proc *p = l->l_proc; 2505 struct file *fp; 2506 int error; 2507 2508 /* getvnode() will use the descriptor for us */ 2509 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2510 return (error); 2511 2512 error = change_mode((struct vnode *)fp->f_data, SCARG(uap, mode), p); 2513 FILE_UNUSE(fp, p); 2514 return (error); 2515 } 2516 2517 /* 2518 * Change mode of a file given path name; this version does not follow links. 2519 */ 2520 /* ARGSUSED */ 2521 int 2522 sys_lchmod(l, v, retval) 2523 struct lwp *l; 2524 void *v; 2525 register_t *retval; 2526 { 2527 struct sys_lchmod_args /* { 2528 syscallarg(const char *) path; 2529 syscallarg(int) mode; 2530 } */ *uap = v; 2531 struct proc *p = l->l_proc; 2532 int error; 2533 struct nameidata nd; 2534 2535 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2536 if ((error = namei(&nd)) != 0) 2537 return (error); 2538 2539 error = change_mode(nd.ni_vp, SCARG(uap, mode), p); 2540 2541 vrele(nd.ni_vp); 2542 return (error); 2543 } 2544 2545 /* 2546 * Common routine to set mode given a vnode. 2547 */ 2548 static int 2549 change_mode(vp, mode, p) 2550 struct vnode *vp; 2551 int mode; 2552 struct proc *p; 2553 { 2554 struct mount *mp; 2555 struct vattr vattr; 2556 int error; 2557 2558 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2559 return (error); 2560 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2561 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2562 VATTR_NULL(&vattr); 2563 vattr.va_mode = mode & ALLPERMS; 2564 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2565 VOP_UNLOCK(vp, 0); 2566 vn_finished_write(mp, 0); 2567 return (error); 2568 } 2569 2570 /* 2571 * Set ownership given a path name; this version follows links. 2572 */ 2573 /* ARGSUSED */ 2574 int 2575 sys_chown(l, v, retval) 2576 struct lwp *l; 2577 void *v; 2578 register_t *retval; 2579 { 2580 struct sys_chown_args /* { 2581 syscallarg(const char *) path; 2582 syscallarg(uid_t) uid; 2583 syscallarg(gid_t) gid; 2584 } */ *uap = v; 2585 struct proc *p = l->l_proc; 2586 int error; 2587 struct nameidata nd; 2588 2589 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2590 if ((error = namei(&nd)) != 0) 2591 return (error); 2592 2593 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 0); 2594 2595 vrele(nd.ni_vp); 2596 return (error); 2597 } 2598 2599 /* 2600 * Set ownership given a path name; this version follows links. 2601 * Provides POSIX semantics. 2602 */ 2603 /* ARGSUSED */ 2604 int 2605 sys___posix_chown(l, v, retval) 2606 struct lwp *l; 2607 void *v; 2608 register_t *retval; 2609 { 2610 struct sys_chown_args /* { 2611 syscallarg(const char *) path; 2612 syscallarg(uid_t) uid; 2613 syscallarg(gid_t) gid; 2614 } */ *uap = v; 2615 struct proc *p = l->l_proc; 2616 int error; 2617 struct nameidata nd; 2618 2619 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2620 if ((error = namei(&nd)) != 0) 2621 return (error); 2622 2623 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 1); 2624 2625 vrele(nd.ni_vp); 2626 return (error); 2627 } 2628 2629 /* 2630 * Set ownership given a file descriptor. 2631 */ 2632 /* ARGSUSED */ 2633 int 2634 sys_fchown(l, v, retval) 2635 struct lwp *l; 2636 void *v; 2637 register_t *retval; 2638 { 2639 struct sys_fchown_args /* { 2640 syscallarg(int) fd; 2641 syscallarg(uid_t) uid; 2642 syscallarg(gid_t) gid; 2643 } */ *uap = v; 2644 struct proc *p = l->l_proc; 2645 int error; 2646 struct file *fp; 2647 2648 /* getvnode() will use the descriptor for us */ 2649 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2650 return (error); 2651 2652 error = change_owner((struct vnode *)fp->f_data, SCARG(uap, uid), 2653 SCARG(uap, gid), p, 0); 2654 FILE_UNUSE(fp, p); 2655 return (error); 2656 } 2657 2658 /* 2659 * Set ownership given a file descriptor, providing POSIX/XPG semantics. 2660 */ 2661 /* ARGSUSED */ 2662 int 2663 sys___posix_fchown(l, v, retval) 2664 struct lwp *l; 2665 void *v; 2666 register_t *retval; 2667 { 2668 struct sys_fchown_args /* { 2669 syscallarg(int) fd; 2670 syscallarg(uid_t) uid; 2671 syscallarg(gid_t) gid; 2672 } */ *uap = v; 2673 struct proc *p = l->l_proc; 2674 int error; 2675 struct file *fp; 2676 2677 /* getvnode() will use the descriptor for us */ 2678 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2679 return (error); 2680 2681 error = change_owner((struct vnode *)fp->f_data, SCARG(uap, uid), 2682 SCARG(uap, gid), p, 1); 2683 FILE_UNUSE(fp, p); 2684 return (error); 2685 } 2686 2687 /* 2688 * Set ownership given a path name; this version does not follow links. 2689 */ 2690 /* ARGSUSED */ 2691 int 2692 sys_lchown(l, v, retval) 2693 struct lwp *l; 2694 void *v; 2695 register_t *retval; 2696 { 2697 struct sys_lchown_args /* { 2698 syscallarg(const char *) path; 2699 syscallarg(uid_t) uid; 2700 syscallarg(gid_t) gid; 2701 } */ *uap = v; 2702 struct proc *p = l->l_proc; 2703 int error; 2704 struct nameidata nd; 2705 2706 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2707 if ((error = namei(&nd)) != 0) 2708 return (error); 2709 2710 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 0); 2711 2712 vrele(nd.ni_vp); 2713 return (error); 2714 } 2715 2716 /* 2717 * Set ownership given a path name; this version does not follow links. 2718 * Provides POSIX/XPG semantics. 2719 */ 2720 /* ARGSUSED */ 2721 int 2722 sys___posix_lchown(l, v, retval) 2723 struct lwp *l; 2724 void *v; 2725 register_t *retval; 2726 { 2727 struct sys_lchown_args /* { 2728 syscallarg(const char *) path; 2729 syscallarg(uid_t) uid; 2730 syscallarg(gid_t) gid; 2731 } */ *uap = v; 2732 struct proc *p = l->l_proc; 2733 int error; 2734 struct nameidata nd; 2735 2736 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2737 if ((error = namei(&nd)) != 0) 2738 return (error); 2739 2740 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 1); 2741 2742 vrele(nd.ni_vp); 2743 return (error); 2744 } 2745 2746 /* 2747 * Common routine to set ownership given a vnode. 2748 */ 2749 static int 2750 change_owner(vp, uid, gid, p, posix_semantics) 2751 struct vnode *vp; 2752 uid_t uid; 2753 gid_t gid; 2754 struct proc *p; 2755 int posix_semantics; 2756 { 2757 struct mount *mp; 2758 struct vattr vattr; 2759 mode_t newmode; 2760 int error; 2761 2762 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2763 return (error); 2764 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2765 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2766 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0) 2767 goto out; 2768 2769 #define CHANGED(x) ((int)(x) != -1) 2770 newmode = vattr.va_mode; 2771 if (posix_semantics) { 2772 /* 2773 * POSIX/XPG semantics: if the caller is not the super-user, 2774 * clear set-user-id and set-group-id bits. Both POSIX and 2775 * the XPG consider the behaviour for calls by the super-user 2776 * implementation-defined; we leave the set-user-id and set- 2777 * group-id settings intact in that case. 2778 */ 2779 if (suser(p->p_ucred, NULL) != 0) 2780 newmode &= ~(S_ISUID | S_ISGID); 2781 } else { 2782 /* 2783 * NetBSD semantics: when changing owner and/or group, 2784 * clear the respective bit(s). 2785 */ 2786 if (CHANGED(uid)) 2787 newmode &= ~S_ISUID; 2788 if (CHANGED(gid)) 2789 newmode &= ~S_ISGID; 2790 } 2791 /* Update va_mode iff altered. */ 2792 if (vattr.va_mode == newmode) 2793 newmode = VNOVAL; 2794 2795 VATTR_NULL(&vattr); 2796 vattr.va_uid = CHANGED(uid) ? uid : (uid_t)VNOVAL; 2797 vattr.va_gid = CHANGED(gid) ? gid : (gid_t)VNOVAL; 2798 vattr.va_mode = newmode; 2799 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2800 #undef CHANGED 2801 2802 out: 2803 VOP_UNLOCK(vp, 0); 2804 vn_finished_write(mp, 0); 2805 return (error); 2806 } 2807 2808 /* 2809 * Set the access and modification times given a path name; this 2810 * version follows links. 2811 */ 2812 /* ARGSUSED */ 2813 int 2814 sys_utimes(l, v, retval) 2815 struct lwp *l; 2816 void *v; 2817 register_t *retval; 2818 { 2819 struct sys_utimes_args /* { 2820 syscallarg(const char *) path; 2821 syscallarg(const struct timeval *) tptr; 2822 } */ *uap = v; 2823 struct proc *p = l->l_proc; 2824 int error; 2825 struct nameidata nd; 2826 2827 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2828 if ((error = namei(&nd)) != 0) 2829 return (error); 2830 2831 error = change_utimes(nd.ni_vp, SCARG(uap, tptr), p); 2832 2833 vrele(nd.ni_vp); 2834 return (error); 2835 } 2836 2837 /* 2838 * Set the access and modification times given a file descriptor. 2839 */ 2840 /* ARGSUSED */ 2841 int 2842 sys_futimes(l, v, retval) 2843 struct lwp *l; 2844 void *v; 2845 register_t *retval; 2846 { 2847 struct sys_futimes_args /* { 2848 syscallarg(int) fd; 2849 syscallarg(const struct timeval *) tptr; 2850 } */ *uap = v; 2851 struct proc *p = l->l_proc; 2852 int error; 2853 struct file *fp; 2854 2855 /* getvnode() will use the descriptor for us */ 2856 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2857 return (error); 2858 2859 error = change_utimes((struct vnode *)fp->f_data, SCARG(uap, tptr), p); 2860 FILE_UNUSE(fp, p); 2861 return (error); 2862 } 2863 2864 /* 2865 * Set the access and modification times given a path name; this 2866 * version does not follow links. 2867 */ 2868 /* ARGSUSED */ 2869 int 2870 sys_lutimes(l, v, retval) 2871 struct lwp *l; 2872 void *v; 2873 register_t *retval; 2874 { 2875 struct sys_lutimes_args /* { 2876 syscallarg(const char *) path; 2877 syscallarg(const struct timeval *) tptr; 2878 } */ *uap = v; 2879 struct proc *p = l->l_proc; 2880 int error; 2881 struct nameidata nd; 2882 2883 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2884 if ((error = namei(&nd)) != 0) 2885 return (error); 2886 2887 error = change_utimes(nd.ni_vp, SCARG(uap, tptr), p); 2888 2889 vrele(nd.ni_vp); 2890 return (error); 2891 } 2892 2893 /* 2894 * Common routine to set access and modification times given a vnode. 2895 */ 2896 static int 2897 change_utimes(vp, tptr, p) 2898 struct vnode *vp; 2899 const struct timeval *tptr; 2900 struct proc *p; 2901 { 2902 struct timeval tv[2]; 2903 struct mount *mp; 2904 struct vattr vattr; 2905 int error; 2906 2907 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2908 return (error); 2909 VATTR_NULL(&vattr); 2910 if (tptr == NULL) { 2911 microtime(&tv[0]); 2912 tv[1] = tv[0]; 2913 vattr.va_vaflags |= VA_UTIMES_NULL; 2914 } else { 2915 error = copyin(tptr, tv, sizeof(tv)); 2916 if (error) 2917 goto out; 2918 } 2919 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2920 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2921 vattr.va_atime.tv_sec = tv[0].tv_sec; 2922 vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000; 2923 vattr.va_mtime.tv_sec = tv[1].tv_sec; 2924 vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000; 2925 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2926 VOP_UNLOCK(vp, 0); 2927 out: 2928 vn_finished_write(mp, 0); 2929 return (error); 2930 } 2931 2932 /* 2933 * Truncate a file given its path name. 2934 */ 2935 /* ARGSUSED */ 2936 int 2937 sys_truncate(l, v, retval) 2938 struct lwp *l; 2939 void *v; 2940 register_t *retval; 2941 { 2942 struct sys_truncate_args /* { 2943 syscallarg(const char *) path; 2944 syscallarg(int) pad; 2945 syscallarg(off_t) length; 2946 } */ *uap = v; 2947 struct proc *p = l->l_proc; 2948 struct vnode *vp; 2949 struct mount *mp; 2950 struct vattr vattr; 2951 int error; 2952 struct nameidata nd; 2953 2954 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2955 if ((error = namei(&nd)) != 0) 2956 return (error); 2957 vp = nd.ni_vp; 2958 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 2959 vrele(vp); 2960 return (error); 2961 } 2962 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2963 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2964 if (vp->v_type == VDIR) 2965 error = EISDIR; 2966 else if ((error = vn_writechk(vp)) == 0 && 2967 (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) { 2968 VATTR_NULL(&vattr); 2969 vattr.va_size = SCARG(uap, length); 2970 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2971 } 2972 vput(vp); 2973 vn_finished_write(mp, 0); 2974 return (error); 2975 } 2976 2977 /* 2978 * Truncate a file given a file descriptor. 2979 */ 2980 /* ARGSUSED */ 2981 int 2982 sys_ftruncate(l, v, retval) 2983 struct lwp *l; 2984 void *v; 2985 register_t *retval; 2986 { 2987 struct sys_ftruncate_args /* { 2988 syscallarg(int) fd; 2989 syscallarg(int) pad; 2990 syscallarg(off_t) length; 2991 } */ *uap = v; 2992 struct proc *p = l->l_proc; 2993 struct mount *mp; 2994 struct vattr vattr; 2995 struct vnode *vp; 2996 struct file *fp; 2997 int error; 2998 2999 /* getvnode() will use the descriptor for us */ 3000 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3001 return (error); 3002 if ((fp->f_flag & FWRITE) == 0) { 3003 error = EINVAL; 3004 goto out; 3005 } 3006 vp = (struct vnode *)fp->f_data; 3007 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 3008 FILE_UNUSE(fp, p); 3009 return (error); 3010 } 3011 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3012 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3013 if (vp->v_type == VDIR) 3014 error = EISDIR; 3015 else if ((error = vn_writechk(vp)) == 0) { 3016 VATTR_NULL(&vattr); 3017 vattr.va_size = SCARG(uap, length); 3018 error = VOP_SETATTR(vp, &vattr, fp->f_cred, p); 3019 } 3020 VOP_UNLOCK(vp, 0); 3021 vn_finished_write(mp, 0); 3022 out: 3023 FILE_UNUSE(fp, p); 3024 return (error); 3025 } 3026 3027 /* 3028 * Sync an open file. 3029 */ 3030 /* ARGSUSED */ 3031 int 3032 sys_fsync(l, v, retval) 3033 struct lwp *l; 3034 void *v; 3035 register_t *retval; 3036 { 3037 struct sys_fsync_args /* { 3038 syscallarg(int) fd; 3039 } */ *uap = v; 3040 struct proc *p = l->l_proc; 3041 struct vnode *vp; 3042 struct mount *mp; 3043 struct file *fp; 3044 int error; 3045 3046 /* getvnode() will use the descriptor for us */ 3047 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3048 return (error); 3049 vp = (struct vnode *)fp->f_data; 3050 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 3051 FILE_UNUSE(fp, p); 3052 return (error); 3053 } 3054 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3055 error = VOP_FSYNC(vp, fp->f_cred, FSYNC_WAIT, 0, 0, p); 3056 if (error == 0 && bioops.io_fsync != NULL && 3057 vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP)) 3058 (*bioops.io_fsync)(vp, 0); 3059 VOP_UNLOCK(vp, 0); 3060 vn_finished_write(mp, 0); 3061 FILE_UNUSE(fp, p); 3062 return (error); 3063 } 3064 3065 /* 3066 * Sync a range of file data. API modeled after that found in AIX. 3067 * 3068 * FDATASYNC indicates that we need only save enough metadata to be able 3069 * to re-read the written data. Note we duplicate AIX's requirement that 3070 * the file be open for writing. 3071 */ 3072 /* ARGSUSED */ 3073 int 3074 sys_fsync_range(l, v, retval) 3075 struct lwp *l; 3076 void *v; 3077 register_t *retval; 3078 { 3079 struct sys_fsync_range_args /* { 3080 syscallarg(int) fd; 3081 syscallarg(int) flags; 3082 syscallarg(off_t) start; 3083 syscallarg(int) length; 3084 } */ *uap = v; 3085 struct proc *p = l->l_proc; 3086 struct vnode *vp; 3087 struct file *fp; 3088 int flags, nflags; 3089 off_t s, e, len; 3090 int error; 3091 3092 /* getvnode() will use the descriptor for us */ 3093 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3094 return (error); 3095 3096 if ((fp->f_flag & FWRITE) == 0) { 3097 FILE_UNUSE(fp, p); 3098 return (EBADF); 3099 } 3100 3101 flags = SCARG(uap, flags); 3102 if (((flags & (FDATASYNC | FFILESYNC)) == 0) || 3103 ((~flags & (FDATASYNC | FFILESYNC)) == 0)) { 3104 return (EINVAL); 3105 } 3106 /* Now set up the flags for value(s) to pass to VOP_FSYNC() */ 3107 if (flags & FDATASYNC) 3108 nflags = FSYNC_DATAONLY | FSYNC_WAIT; 3109 else 3110 nflags = FSYNC_WAIT; 3111 if (flags & FDISKSYNC) 3112 nflags |= FSYNC_CACHE; 3113 3114 len = SCARG(uap, length); 3115 /* If length == 0, we do the whole file, and s = l = 0 will do that */ 3116 if (len) { 3117 s = SCARG(uap, start); 3118 e = s + len; 3119 if (e < s) { 3120 FILE_UNUSE(fp, p); 3121 return (EINVAL); 3122 } 3123 } else { 3124 e = 0; 3125 s = 0; 3126 } 3127 3128 vp = (struct vnode *)fp->f_data; 3129 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3130 error = VOP_FSYNC(vp, fp->f_cred, nflags, s, e, p); 3131 3132 if (error == 0 && bioops.io_fsync != NULL && 3133 vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP)) 3134 (*bioops.io_fsync)(vp, nflags); 3135 3136 VOP_UNLOCK(vp, 0); 3137 FILE_UNUSE(fp, p); 3138 return (error); 3139 } 3140 3141 /* 3142 * Sync the data of an open file. 3143 */ 3144 /* ARGSUSED */ 3145 int 3146 sys_fdatasync(l, v, retval) 3147 struct lwp *l; 3148 void *v; 3149 register_t *retval; 3150 { 3151 struct sys_fdatasync_args /* { 3152 syscallarg(int) fd; 3153 } */ *uap = v; 3154 struct proc *p = l->l_proc; 3155 struct vnode *vp; 3156 struct file *fp; 3157 int error; 3158 3159 /* getvnode() will use the descriptor for us */ 3160 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3161 return (error); 3162 if ((fp->f_flag & FWRITE) == 0) { 3163 FILE_UNUSE(fp, p); 3164 return (EBADF); 3165 } 3166 vp = (struct vnode *)fp->f_data; 3167 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3168 error = VOP_FSYNC(vp, fp->f_cred, FSYNC_WAIT|FSYNC_DATAONLY, 0, 0, p); 3169 VOP_UNLOCK(vp, 0); 3170 FILE_UNUSE(fp, p); 3171 return (error); 3172 } 3173 3174 /* 3175 * Rename files, (standard) BSD semantics frontend. 3176 */ 3177 /* ARGSUSED */ 3178 int 3179 sys_rename(l, v, retval) 3180 struct lwp *l; 3181 void *v; 3182 register_t *retval; 3183 { 3184 struct sys_rename_args /* { 3185 syscallarg(const char *) from; 3186 syscallarg(const char *) to; 3187 } */ *uap = v; 3188 struct proc *p = l->l_proc; 3189 3190 return (rename_files(SCARG(uap, from), SCARG(uap, to), p, 0)); 3191 } 3192 3193 /* 3194 * Rename files, POSIX semantics frontend. 3195 */ 3196 /* ARGSUSED */ 3197 int 3198 sys___posix_rename(l, v, retval) 3199 struct lwp *l; 3200 void *v; 3201 register_t *retval; 3202 { 3203 struct sys___posix_rename_args /* { 3204 syscallarg(const char *) from; 3205 syscallarg(const char *) to; 3206 } */ *uap = v; 3207 struct proc *p = l->l_proc; 3208 3209 return (rename_files(SCARG(uap, from), SCARG(uap, to), p, 1)); 3210 } 3211 3212 /* 3213 * Rename files. Source and destination must either both be directories, 3214 * or both not be directories. If target is a directory, it must be empty. 3215 * If `from' and `to' refer to the same object, the value of the `retain' 3216 * argument is used to determine whether `from' will be 3217 * 3218 * (retain == 0) deleted unless `from' and `to' refer to the same 3219 * object in the file system's name space (BSD). 3220 * (retain == 1) always retained (POSIX). 3221 */ 3222 static int 3223 rename_files(from, to, p, retain) 3224 const char *from, *to; 3225 struct proc *p; 3226 int retain; 3227 { 3228 struct mount *mp = NULL; 3229 struct vnode *tvp, *fvp, *tdvp; 3230 struct nameidata fromnd, tond; 3231 int error; 3232 3233 NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE, 3234 from, p); 3235 if ((error = namei(&fromnd)) != 0) 3236 return (error); 3237 fvp = fromnd.ni_vp; 3238 error = vn_start_write(fvp, &mp, V_WAIT | V_PCATCH); 3239 if (error != 0) { 3240 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3241 vrele(fromnd.ni_dvp); 3242 vrele(fvp); 3243 if (fromnd.ni_startdir) 3244 vrele(fromnd.ni_startdir); 3245 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 3246 return (error); 3247 } 3248 NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART | 3249 (fvp->v_type == VDIR ? CREATEDIR : 0), UIO_USERSPACE, to, p); 3250 if ((error = namei(&tond)) != 0) { 3251 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3252 vrele(fromnd.ni_dvp); 3253 vrele(fvp); 3254 goto out1; 3255 } 3256 tdvp = tond.ni_dvp; 3257 tvp = tond.ni_vp; 3258 3259 if (tvp != NULL) { 3260 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 3261 error = ENOTDIR; 3262 goto out; 3263 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 3264 error = EISDIR; 3265 goto out; 3266 } 3267 } 3268 3269 if (fvp == tdvp) 3270 error = EINVAL; 3271 3272 /* 3273 * Source and destination refer to the same object. 3274 */ 3275 if (fvp == tvp) { 3276 if (retain) 3277 error = -1; 3278 else if (fromnd.ni_dvp == tdvp && 3279 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 3280 !memcmp(fromnd.ni_cnd.cn_nameptr, 3281 tond.ni_cnd.cn_nameptr, 3282 fromnd.ni_cnd.cn_namelen)) 3283 error = -1; 3284 } 3285 3286 out: 3287 if (!error) { 3288 VOP_LEASE(tdvp, p, p->p_ucred, LEASE_WRITE); 3289 if (fromnd.ni_dvp != tdvp) 3290 VOP_LEASE(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 3291 if (tvp) { 3292 VOP_LEASE(tvp, p, p->p_ucred, LEASE_WRITE); 3293 } 3294 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 3295 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 3296 } else { 3297 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 3298 if (tdvp == tvp) 3299 vrele(tdvp); 3300 else 3301 vput(tdvp); 3302 if (tvp) 3303 vput(tvp); 3304 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3305 vrele(fromnd.ni_dvp); 3306 vrele(fvp); 3307 } 3308 vrele(tond.ni_startdir); 3309 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 3310 out1: 3311 vn_finished_write(mp, 0); 3312 if (fromnd.ni_startdir) 3313 vrele(fromnd.ni_startdir); 3314 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 3315 return (error == -1 ? 0 : error); 3316 } 3317 3318 /* 3319 * Make a directory file. 3320 */ 3321 /* ARGSUSED */ 3322 int 3323 sys_mkdir(l, v, retval) 3324 struct lwp *l; 3325 void *v; 3326 register_t *retval; 3327 { 3328 struct sys_mkdir_args /* { 3329 syscallarg(const char *) path; 3330 syscallarg(int) mode; 3331 } */ *uap = v; 3332 struct proc *p = l->l_proc; 3333 struct mount *mp; 3334 struct vnode *vp; 3335 struct vattr vattr; 3336 int error; 3337 struct nameidata nd; 3338 3339 restart: 3340 NDINIT(&nd, CREATE, LOCKPARENT | CREATEDIR, UIO_USERSPACE, 3341 SCARG(uap, path), p); 3342 if ((error = namei(&nd)) != 0) 3343 return (error); 3344 vp = nd.ni_vp; 3345 if (vp != NULL) { 3346 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3347 if (nd.ni_dvp == vp) 3348 vrele(nd.ni_dvp); 3349 else 3350 vput(nd.ni_dvp); 3351 vrele(vp); 3352 return (EEXIST); 3353 } 3354 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 3355 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3356 if (nd.ni_dvp == vp) 3357 vrele(nd.ni_dvp); 3358 else 3359 vput(nd.ni_dvp); 3360 if ((error = vn_start_write(NULL, &mp, 3361 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 3362 return (error); 3363 goto restart; 3364 } 3365 VATTR_NULL(&vattr); 3366 vattr.va_type = VDIR; 3367 vattr.va_mode = 3368 (SCARG(uap, mode) & ACCESSPERMS) &~ p->p_cwdi->cwdi_cmask; 3369 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 3370 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); 3371 if (!error) 3372 vput(nd.ni_vp); 3373 vn_finished_write(mp, 0); 3374 return (error); 3375 } 3376 3377 /* 3378 * Remove a directory file. 3379 */ 3380 /* ARGSUSED */ 3381 int 3382 sys_rmdir(l, v, retval) 3383 struct lwp *l; 3384 void *v; 3385 register_t *retval; 3386 { 3387 struct sys_rmdir_args /* { 3388 syscallarg(const char *) path; 3389 } */ *uap = v; 3390 struct proc *p = l->l_proc; 3391 struct mount *mp; 3392 struct vnode *vp; 3393 int error; 3394 struct nameidata nd; 3395 3396 restart: 3397 NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE, 3398 SCARG(uap, path), p); 3399 if ((error = namei(&nd)) != 0) 3400 return (error); 3401 vp = nd.ni_vp; 3402 if (vp->v_type != VDIR) { 3403 error = ENOTDIR; 3404 goto out; 3405 } 3406 /* 3407 * No rmdir "." please. 3408 */ 3409 if (nd.ni_dvp == vp) { 3410 error = EINVAL; 3411 goto out; 3412 } 3413 /* 3414 * The root of a mounted filesystem cannot be deleted. 3415 */ 3416 if (vp->v_flag & VROOT) { 3417 error = EBUSY; 3418 goto out; 3419 } 3420 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 3421 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3422 if (nd.ni_dvp == vp) 3423 vrele(nd.ni_dvp); 3424 else 3425 vput(nd.ni_dvp); 3426 vput(vp); 3427 if ((error = vn_start_write(NULL, &mp, 3428 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 3429 return (error); 3430 goto restart; 3431 } 3432 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 3433 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3434 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 3435 vn_finished_write(mp, 0); 3436 return (error); 3437 3438 out: 3439 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3440 if (nd.ni_dvp == vp) 3441 vrele(nd.ni_dvp); 3442 else 3443 vput(nd.ni_dvp); 3444 vput(vp); 3445 return (error); 3446 } 3447 3448 /* 3449 * Read a block of directory entries in a file system independent format. 3450 */ 3451 int 3452 sys_getdents(l, v, retval) 3453 struct lwp *l; 3454 void *v; 3455 register_t *retval; 3456 { 3457 struct sys_getdents_args /* { 3458 syscallarg(int) fd; 3459 syscallarg(char *) buf; 3460 syscallarg(size_t) count; 3461 } */ *uap = v; 3462 struct proc *p = l->l_proc; 3463 struct file *fp; 3464 int error, done; 3465 3466 /* getvnode() will use the descriptor for us */ 3467 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3468 return (error); 3469 if ((fp->f_flag & FREAD) == 0) { 3470 error = EBADF; 3471 goto out; 3472 } 3473 error = vn_readdir(fp, SCARG(uap, buf), UIO_USERSPACE, 3474 SCARG(uap, count), &done, p, 0, 0); 3475 #ifdef KTRACE 3476 if (!error && KTRPOINT(p, KTR_GENIO)) { 3477 struct iovec iov; 3478 iov.iov_base = SCARG(uap, buf); 3479 iov.iov_len = done; 3480 ktrgenio(p, SCARG(uap, fd), UIO_READ, &iov, done, 0); 3481 } 3482 #endif 3483 *retval = done; 3484 out: 3485 FILE_UNUSE(fp, p); 3486 return (error); 3487 } 3488 3489 /* 3490 * Set the mode mask for creation of filesystem nodes. 3491 */ 3492 int 3493 sys_umask(l, v, retval) 3494 struct lwp *l; 3495 void *v; 3496 register_t *retval; 3497 { 3498 struct sys_umask_args /* { 3499 syscallarg(mode_t) newmask; 3500 } */ *uap = v; 3501 struct proc *p = l->l_proc; 3502 struct cwdinfo *cwdi; 3503 3504 cwdi = p->p_cwdi; 3505 *retval = cwdi->cwdi_cmask; 3506 cwdi->cwdi_cmask = SCARG(uap, newmask) & ALLPERMS; 3507 return (0); 3508 } 3509 3510 /* 3511 * Void all references to file by ripping underlying filesystem 3512 * away from vnode. 3513 */ 3514 /* ARGSUSED */ 3515 int 3516 sys_revoke(l, v, retval) 3517 struct lwp *l; 3518 void *v; 3519 register_t *retval; 3520 { 3521 struct sys_revoke_args /* { 3522 syscallarg(const char *) path; 3523 } */ *uap = v; 3524 struct proc *p = l->l_proc; 3525 struct mount *mp; 3526 struct vnode *vp; 3527 struct vattr vattr; 3528 int error; 3529 struct nameidata nd; 3530 3531 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3532 if ((error = namei(&nd)) != 0) 3533 return (error); 3534 vp = nd.ni_vp; 3535 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0) 3536 goto out; 3537 if (p->p_ucred->cr_uid != vattr.va_uid && 3538 (error = suser(p->p_ucred, &p->p_acflag)) != 0) 3539 goto out; 3540 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 3541 goto out; 3542 if (vp->v_usecount > 1 || (vp->v_flag & (VALIASED | VLAYER))) 3543 VOP_REVOKE(vp, REVOKEALL); 3544 vn_finished_write(mp, 0); 3545 out: 3546 vrele(vp); 3547 return (error); 3548 } 3549 3550 /* 3551 * Convert a user file descriptor to a kernel file entry. 3552 */ 3553 int 3554 getvnode(fdp, fd, fpp) 3555 struct filedesc *fdp; 3556 int fd; 3557 struct file **fpp; 3558 { 3559 struct vnode *vp; 3560 struct file *fp; 3561 3562 if ((fp = fd_getfile(fdp, fd)) == NULL) 3563 return (EBADF); 3564 3565 FILE_USE(fp); 3566 3567 if (fp->f_type != DTYPE_VNODE) { 3568 FILE_UNUSE(fp, NULL); 3569 return (EINVAL); 3570 } 3571 3572 vp = (struct vnode *)fp->f_data; 3573 if (vp->v_type == VBAD) { 3574 FILE_UNUSE(fp, NULL); 3575 return (EBADF); 3576 } 3577 3578 *fpp = fp; 3579 return (0); 3580 } 3581 3582 /* 3583 * Push extended attribute configuration information into the VFS. 3584 * 3585 * NOTE: Not all file systems that support extended attributes will 3586 * require the use of this system call. 3587 */ 3588 int 3589 sys_extattrctl(struct lwp *l, void *v, register_t *retval) 3590 { 3591 struct sys_extattrctl_args /* { 3592 syscallarg(const char *) path; 3593 syscallarg(int) cmd; 3594 syscallarg(const char *) filename; 3595 syscallarg(int) attrnamespace; 3596 syscallarg(const char *) attrname; 3597 } */ *uap = v; 3598 struct proc *p = l->l_proc; 3599 struct vnode *vp; 3600 struct nameidata nd; 3601 struct mount *mp; 3602 char attrname[EXTATTR_MAXNAMELEN]; 3603 int error; 3604 3605 if (SCARG(uap, attrname) != NULL) { 3606 error = copyinstr(SCARG(uap, attrname), attrname, 3607 sizeof(attrname), NULL); 3608 if (error) 3609 return (error); 3610 } 3611 3612 vp = NULL; 3613 if (SCARG(uap, filename) != NULL) { 3614 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 3615 SCARG(uap, filename), p); 3616 error = namei(&nd); 3617 if (error) 3618 return (error); 3619 vp = nd.ni_vp; 3620 } 3621 3622 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3623 error = namei(&nd); 3624 if (error) { 3625 if (vp != NULL) 3626 vput(vp); 3627 return (error); 3628 } 3629 3630 error = vn_start_write(nd.ni_vp, &mp, V_WAIT | V_PCATCH); 3631 if (error) { 3632 if (vp != NULL) 3633 vput(vp); 3634 return (error); 3635 } 3636 3637 error = VFS_EXTATTRCTL(mp, SCARG(uap, cmd), vp, 3638 SCARG(uap, attrnamespace), 3639 SCARG(uap, attrname) != NULL ? attrname : NULL, p); 3640 3641 vn_finished_write(mp, 0); 3642 3643 if (vp != NULL) 3644 vrele(vp); 3645 3646 return (error); 3647 } 3648 3649 /* 3650 * Set a named extended attribute on a file or directory. 3651 */ 3652 static int 3653 extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3654 const void *data, size_t nbytes, struct proc *p, register_t *retval) 3655 { 3656 struct mount *mp; 3657 struct uio auio; 3658 struct iovec aiov; 3659 ssize_t cnt; 3660 int error; 3661 3662 error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH); 3663 if (error) 3664 return (error); 3665 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3666 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3667 3668 aiov.iov_base = __UNCONST(data); /* XXXUNCONST kills const */ 3669 aiov.iov_len = nbytes; 3670 auio.uio_iov = &aiov; 3671 auio.uio_iovcnt = 1; 3672 auio.uio_offset = 0; 3673 if (nbytes > INT_MAX) { 3674 error = EINVAL; 3675 goto done; 3676 } 3677 auio.uio_resid = nbytes; 3678 auio.uio_rw = UIO_WRITE; 3679 auio.uio_segflg = UIO_USERSPACE; 3680 auio.uio_procp = p; 3681 cnt = nbytes; 3682 3683 error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio, 3684 p->p_ucred, p); 3685 cnt -= auio.uio_resid; 3686 retval[0] = cnt; 3687 3688 done: 3689 VOP_UNLOCK(vp, 0); 3690 vn_finished_write(mp, 0); 3691 return (error); 3692 } 3693 3694 int 3695 sys_extattr_set_fd(struct lwp *l, void *v, register_t *retval) 3696 { 3697 struct sys_extattr_set_fd_args /* { 3698 syscallarg(int) fd; 3699 syscallarg(int) attrnamespace; 3700 syscallarg(const char *) attrname; 3701 syscallarg(const void *) data; 3702 syscallarg(size_t) nbytes; 3703 } */ *uap = v; 3704 struct proc *p = l->l_proc; 3705 struct file *fp; 3706 struct vnode *vp; 3707 char attrname[EXTATTR_MAXNAMELEN]; 3708 int error; 3709 3710 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3711 NULL); 3712 if (error) 3713 return (error); 3714 3715 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 3716 if (error) 3717 return (error); 3718 vp = (struct vnode *) fp->f_data; 3719 3720 error = extattr_set_vp(vp, SCARG(uap, attrnamespace), attrname, 3721 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3722 3723 FILE_UNUSE(fp, p); 3724 return (error); 3725 } 3726 3727 int 3728 sys_extattr_set_file(struct lwp *l, void *v, register_t *retval) 3729 { 3730 struct sys_extattr_set_file_args /* { 3731 syscallarg(const char *) path; 3732 syscallarg(int) attrnamespace; 3733 syscallarg(const char *) attrname; 3734 syscallarg(const void *) data; 3735 syscallarg(size_t) nbytes; 3736 } */ *uap = v; 3737 struct proc *p = l->l_proc; 3738 struct nameidata nd; 3739 char attrname[EXTATTR_MAXNAMELEN]; 3740 int error; 3741 3742 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3743 NULL); 3744 if (error) 3745 return (error); 3746 3747 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3748 error = namei(&nd); 3749 if (error) 3750 return (error); 3751 3752 error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3753 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3754 3755 vrele(nd.ni_vp); 3756 return (error); 3757 } 3758 3759 int 3760 sys_extattr_set_link(struct lwp *l, void *v, register_t *retval) 3761 { 3762 struct sys_extattr_set_link_args /* { 3763 syscallarg(const char *) path; 3764 syscallarg(int) attrnamespace; 3765 syscallarg(const char *) attrname; 3766 syscallarg(const void *) data; 3767 syscallarg(size_t) nbytes; 3768 } */ *uap = v; 3769 struct proc *p = l->l_proc; 3770 struct nameidata nd; 3771 char attrname[EXTATTR_MAXNAMELEN]; 3772 int error; 3773 3774 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3775 NULL); 3776 if (error) 3777 return (error); 3778 3779 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3780 error = namei(&nd); 3781 if (error) 3782 return (error); 3783 3784 error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3785 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3786 3787 vrele(nd.ni_vp); 3788 return (error); 3789 } 3790 3791 /* 3792 * Get a named extended attribute on a file or directory. 3793 */ 3794 static int 3795 extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3796 void *data, size_t nbytes, struct proc *p, register_t *retval) 3797 { 3798 struct uio auio, *auiop; 3799 struct iovec aiov; 3800 ssize_t cnt; 3801 size_t size, *sizep; 3802 int error; 3803 3804 VOP_LEASE(vp, p, p->p_ucred, LEASE_READ); 3805 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3806 3807 /* 3808 * Slightly unusual semantics: if the user provides a NULL data 3809 * pointer, they don't want to receive the data, just the maximum 3810 * read length. 3811 */ 3812 auiop = NULL; 3813 sizep = NULL; 3814 cnt = 0; 3815 if (data != NULL) { 3816 aiov.iov_base = data; 3817 aiov.iov_len = nbytes; 3818 auio.uio_iov = &aiov; 3819 auio.uio_offset = 0; 3820 if (nbytes > INT_MAX) { 3821 error = EINVAL; 3822 goto done; 3823 } 3824 auio.uio_resid = nbytes; 3825 auio.uio_rw = UIO_READ; 3826 auio.uio_segflg = UIO_USERSPACE; 3827 auio.uio_procp = p; 3828 auiop = &auio; 3829 cnt = nbytes; 3830 } else 3831 sizep = &size; 3832 3833 error = VOP_GETEXTATTR(vp, attrnamespace, attrname, auiop, sizep, 3834 p->p_ucred, p); 3835 3836 if (auiop != NULL) { 3837 cnt -= auio.uio_resid; 3838 retval[0] = cnt; 3839 } else 3840 retval[0] = size; 3841 3842 done: 3843 VOP_UNLOCK(vp, 0); 3844 return (error); 3845 } 3846 3847 int 3848 sys_extattr_get_fd(struct lwp *l, void *v, register_t *retval) 3849 { 3850 struct sys_extattr_get_fd_args /* { 3851 syscallarg(int) fd; 3852 syscallarg(int) attrnamespace; 3853 syscallarg(const char *) attrname; 3854 syscallarg(void *) data; 3855 syscallarg(size_t) nbytes; 3856 } */ *uap = v; 3857 struct proc *p = l->l_proc; 3858 struct file *fp; 3859 struct vnode *vp; 3860 char attrname[EXTATTR_MAXNAMELEN]; 3861 int error; 3862 3863 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3864 NULL); 3865 if (error) 3866 return (error); 3867 3868 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 3869 if (error) 3870 return (error); 3871 vp = (struct vnode *) fp->f_data; 3872 3873 error = extattr_get_vp(vp, SCARG(uap, attrnamespace), attrname, 3874 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3875 3876 FILE_UNUSE(fp, p); 3877 return (error); 3878 } 3879 3880 int 3881 sys_extattr_get_file(struct lwp *l, void *v, register_t *retval) 3882 { 3883 struct sys_extattr_get_file_args /* { 3884 syscallarg(const char *) path; 3885 syscallarg(int) attrnamespace; 3886 syscallarg(const char *) attrname; 3887 syscallarg(void *) data; 3888 syscallarg(size_t) nbytes; 3889 } */ *uap = v; 3890 struct proc *p = l->l_proc; 3891 struct nameidata nd; 3892 char attrname[EXTATTR_MAXNAMELEN]; 3893 int error; 3894 3895 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3896 NULL); 3897 if (error) 3898 return (error); 3899 3900 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3901 error = namei(&nd); 3902 if (error) 3903 return (error); 3904 3905 error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3906 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3907 3908 vrele(nd.ni_vp); 3909 return (error); 3910 } 3911 3912 int 3913 sys_extattr_get_link(struct lwp *l, void *v, register_t *retval) 3914 { 3915 struct sys_extattr_get_link_args /* { 3916 syscallarg(const char *) path; 3917 syscallarg(int) attrnamespace; 3918 syscallarg(const char *) attrname; 3919 syscallarg(void *) data; 3920 syscallarg(size_t) nbytes; 3921 } */ *uap = v; 3922 struct proc *p = l->l_proc; 3923 struct nameidata nd; 3924 char attrname[EXTATTR_MAXNAMELEN]; 3925 int error; 3926 3927 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3928 NULL); 3929 if (error) 3930 return (error); 3931 3932 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3933 error = namei(&nd); 3934 if (error) 3935 return (error); 3936 3937 error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3938 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3939 3940 vrele(nd.ni_vp); 3941 return (error); 3942 } 3943 3944 /* 3945 * Delete a named extended attribute on a file or directory. 3946 */ 3947 static int 3948 extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3949 struct proc *p) 3950 { 3951 struct mount *mp; 3952 int error; 3953 3954 error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH); 3955 if (error) 3956 return (error); 3957 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3958 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3959 3960 error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, p->p_ucred, p); 3961 if (error == EOPNOTSUPP) 3962 error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL, 3963 p->p_ucred, p); 3964 3965 VOP_UNLOCK(vp, 0); 3966 vn_finished_write(mp, 0); 3967 return (error); 3968 } 3969 3970 int 3971 sys_extattr_delete_fd(struct lwp *l, void *v, register_t *retval) 3972 { 3973 struct sys_extattr_delete_fd_args /* { 3974 syscallarg(int) fd; 3975 syscallarg(int) attrnamespace; 3976 syscallarg(const char *) attrname; 3977 } */ *uap = v; 3978 struct proc *p = l->l_proc; 3979 struct file *fp; 3980 struct vnode *vp; 3981 char attrname[EXTATTR_MAXNAMELEN]; 3982 int error; 3983 3984 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3985 NULL); 3986 if (error) 3987 return (error); 3988 3989 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 3990 if (error) 3991 return (error); 3992 vp = (struct vnode *) fp->f_data; 3993 3994 error = extattr_delete_vp(vp, SCARG(uap, attrnamespace), attrname, p); 3995 3996 FILE_UNUSE(fp, p); 3997 return (error); 3998 } 3999 4000 int 4001 sys_extattr_delete_file(struct lwp *l, void *v, register_t *retval) 4002 { 4003 struct sys_extattr_delete_file_args /* { 4004 syscallarg(const char *) path; 4005 syscallarg(int) attrnamespace; 4006 syscallarg(const char *) attrname; 4007 } */ *uap = v; 4008 struct proc *p = l->l_proc; 4009 struct nameidata nd; 4010 char attrname[EXTATTR_MAXNAMELEN]; 4011 int error; 4012 4013 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 4014 NULL); 4015 if (error) 4016 return (error); 4017 4018 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4019 error = namei(&nd); 4020 if (error) 4021 return (error); 4022 4023 error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 4024 p); 4025 4026 vrele(nd.ni_vp); 4027 return (error); 4028 } 4029 4030 int 4031 sys_extattr_delete_link(struct lwp *l, void *v, register_t *retval) 4032 { 4033 struct sys_extattr_delete_link_args /* { 4034 syscallarg(const char *) path; 4035 syscallarg(int) attrnamespace; 4036 syscallarg(const char *) attrname; 4037 } */ *uap = v; 4038 struct proc *p = l->l_proc; 4039 struct nameidata nd; 4040 char attrname[EXTATTR_MAXNAMELEN]; 4041 int error; 4042 4043 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 4044 NULL); 4045 if (error) 4046 return (error); 4047 4048 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4049 error = namei(&nd); 4050 if (error) 4051 return (error); 4052 4053 error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 4054 p); 4055 4056 vrele(nd.ni_vp); 4057 return (error); 4058 } 4059 4060 /* 4061 * Retrieve a list of extended attributes on a file or directory. 4062 */ 4063 static int 4064 extattr_list_vp(struct vnode *vp, int attrnamespace, void *data, size_t nbytes, 4065 struct proc *p, register_t *retval) 4066 { 4067 struct uio auio, *auiop; 4068 size_t size, *sizep; 4069 struct iovec aiov; 4070 ssize_t cnt; 4071 int error; 4072 4073 VOP_LEASE(vp, p, p->p_ucred, LEASE_READ); 4074 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 4075 4076 auiop = NULL; 4077 sizep = NULL; 4078 cnt = 0; 4079 if (data != NULL) { 4080 aiov.iov_base = data; 4081 aiov.iov_len = nbytes; 4082 auio.uio_iov = &aiov; 4083 auio.uio_offset = 0; 4084 if (nbytes > INT_MAX) { 4085 error = EINVAL; 4086 goto done; 4087 } 4088 auio.uio_resid = nbytes; 4089 auio.uio_rw = UIO_READ; 4090 auio.uio_segflg = UIO_USERSPACE; 4091 auio.uio_procp = p; 4092 auiop = &auio; 4093 cnt = nbytes; 4094 } else 4095 sizep = &size; 4096 4097 error = VOP_LISTEXTATTR(vp, attrnamespace, auiop, sizep, 4098 p->p_ucred, p); 4099 4100 if (auiop != NULL) { 4101 cnt -= auio.uio_resid; 4102 retval[0] = cnt; 4103 } else 4104 retval[0] = size; 4105 4106 done: 4107 VOP_UNLOCK(vp, 0); 4108 return (error); 4109 } 4110 4111 int 4112 sys_extattr_list_fd(struct lwp *l, void *v, register_t *retval) 4113 { 4114 struct sys_extattr_list_fd_args /* { 4115 syscallarg(int) fd; 4116 syscallarg(int) attrnamespace; 4117 syscallarg(void *) data; 4118 syscallarg(size_t) nbytes; 4119 } */ *uap = v; 4120 struct proc *p = l->l_proc; 4121 struct file *fp; 4122 struct vnode *vp; 4123 int error; 4124 4125 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 4126 if (error) 4127 return (error); 4128 vp = (struct vnode *) fp->f_data; 4129 4130 error = extattr_list_vp(vp, SCARG(uap, attrnamespace), 4131 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 4132 4133 FILE_UNUSE(fp, p); 4134 return (error); 4135 } 4136 4137 int 4138 sys_extattr_list_file(struct lwp *l, void *v, register_t *retval) 4139 { 4140 struct sys_extattr_list_file_args /* { 4141 syscallarg(const char *) path; 4142 syscallarg(int) attrnamespace; 4143 syscallarg(void *) data; 4144 syscallarg(size_t) nbytes; 4145 } */ *uap = v; 4146 struct proc *p = l->l_proc; 4147 struct nameidata nd; 4148 int error; 4149 4150 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4151 error = namei(&nd); 4152 if (error) 4153 return (error); 4154 4155 error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace), 4156 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 4157 4158 vrele(nd.ni_vp); 4159 return (error); 4160 } 4161 4162 int 4163 sys_extattr_list_link(struct lwp *l, void *v, register_t *retval) 4164 { 4165 struct sys_extattr_list_link_args /* { 4166 syscallarg(const char *) path; 4167 syscallarg(int) attrnamespace; 4168 syscallarg(void *) data; 4169 syscallarg(size_t) nbytes; 4170 } */ *uap = v; 4171 struct proc *p = l->l_proc; 4172 struct nameidata nd; 4173 int error; 4174 4175 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4176 error = namei(&nd); 4177 if (error) 4178 return (error); 4179 4180 error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace), 4181 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 4182 4183 vrele(nd.ni_vp); 4184 return (error); 4185 } 4186
Indexes created Fri Sep 26 20:09:58 GMT 2025