vfs_syscalls.c revision 1.214
1 /* $NetBSD: vfs_syscalls.c,v 1.214 2005/01/02 16:08:29 thorpej 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 1.214 2005/01/02 16:08:29 thorpej 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 68 #include <miscfs/genfs/genfs.h> 69 #include <miscfs/syncfs/syncfs.h> 70 71 #if NFSS > 0 72 #include <dev/fssvar.h> 73 #endif 74 75 MALLOC_DEFINE(M_MOUNT, "mount", "vfs mount struct"); 76 77 static int change_dir(struct nameidata *, struct proc *); 78 static int change_flags(struct vnode *, u_long, struct proc *); 79 static int change_mode(struct vnode *, int, struct proc *p); 80 static int change_owner(struct vnode *, uid_t, gid_t, struct proc *, int); 81 static int change_utimes(struct vnode *vp, const struct timeval *, 82 struct proc *p); 83 static int rename_files(const char *, const char *, struct proc *, int); 84 85 void checkdirs(struct vnode *); 86 87 int dovfsusermount = 0; 88 89 /* 90 * Virtual File System System Calls 91 */ 92 93 /* 94 * Mount a file system. 95 */ 96 97 #if defined(COMPAT_09) || defined(COMPAT_43) 98 /* 99 * This table is used to maintain compatibility with 4.3BSD 100 * and NetBSD 0.9 mount syscalls. Note, the order is important! 101 * 102 * Do not modify this table. It should only contain filesystems 103 * supported by NetBSD 0.9 and 4.3BSD. 104 */ 105 const char * const mountcompatnames[] = { 106 NULL, /* 0 = MOUNT_NONE */ 107 MOUNT_FFS, /* 1 = MOUNT_UFS */ 108 MOUNT_NFS, /* 2 */ 109 MOUNT_MFS, /* 3 */ 110 MOUNT_MSDOS, /* 4 */ 111 MOUNT_CD9660, /* 5 = MOUNT_ISOFS */ 112 MOUNT_FDESC, /* 6 */ 113 MOUNT_KERNFS, /* 7 */ 114 NULL, /* 8 = MOUNT_DEVFS */ 115 MOUNT_AFS, /* 9 */ 116 }; 117 const int nmountcompatnames = sizeof(mountcompatnames) / 118 sizeof(mountcompatnames[0]); 119 #endif /* COMPAT_09 || COMPAT_43 */ 120 121 /* ARGSUSED */ 122 int 123 sys_mount(l, v, retval) 124 struct lwp *l; 125 void *v; 126 register_t *retval; 127 { 128 struct sys_mount_args /* { 129 syscallarg(const char *) type; 130 syscallarg(const char *) path; 131 syscallarg(int) flags; 132 syscallarg(void *) data; 133 } */ *uap = v; 134 struct proc *p = l->l_proc; 135 struct vnode *vp; 136 struct mount *mp; 137 int error, flag = 0; 138 char fstypename[MFSNAMELEN]; 139 struct vattr va; 140 struct nameidata nd; 141 struct vfsops *vfs; 142 143 if (dovfsusermount == 0 && (SCARG(uap, flags) & MNT_GETARGS) == 0 && 144 (error = suser(p->p_ucred, &p->p_acflag))) 145 return (error); 146 /* 147 * Get vnode to be covered 148 */ 149 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, 150 SCARG(uap, path), p); 151 if ((error = namei(&nd)) != 0) 152 return (error); 153 vp = nd.ni_vp; 154 /* 155 * A lookup in VFS_MOUNT might result in an attempt to 156 * lock this vnode again, so make the lock recursive. 157 */ 158 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY | LK_SETRECURSE); 159 if (SCARG(uap, flags) & (MNT_UPDATE | MNT_GETARGS)) { 160 if ((vp->v_flag & VROOT) == 0) { 161 vput(vp); 162 return (EINVAL); 163 } 164 mp = vp->v_mount; 165 flag = mp->mnt_flag; 166 vfs = mp->mnt_op; 167 /* 168 * We only allow the filesystem to be reloaded if it 169 * is currently mounted read-only. 170 */ 171 if ((SCARG(uap, flags) & MNT_RELOAD) && 172 ((mp->mnt_flag & MNT_RDONLY) == 0)) { 173 vput(vp); 174 return (EOPNOTSUPP); /* Needs translation */ 175 } 176 /* 177 * In "highly secure" mode, don't let the caller do anything 178 * but downgrade a filesystem from read-write to read-only. 179 * (see also below; MNT_UPDATE or MNT_GETARGS is required.) 180 */ 181 if (securelevel >= 2 && 182 SCARG(uap, flags) != MNT_GETARGS && 183 SCARG(uap, flags) != 184 (mp->mnt_flag | MNT_RDONLY | 185 MNT_RELOAD | MNT_FORCE | MNT_UPDATE)) { 186 vput(vp); 187 return (EPERM); 188 } 189 mp->mnt_flag |= SCARG(uap, flags) & 190 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 191 /* 192 * Only root, or the user that did the original mount is 193 * permitted to update it. 194 */ 195 if ((mp->mnt_flag & MNT_GETARGS) == 0 && 196 mp->mnt_stat.f_owner != p->p_ucred->cr_uid && 197 (error = suser(p->p_ucred, &p->p_acflag)) != 0) { 198 vput(vp); 199 return (error); 200 } 201 /* 202 * Do not allow NFS export by non-root users. For non-root 203 * users, silently enforce MNT_NOSUID and MNT_NODEV, and 204 * MNT_NOEXEC if mount point is already MNT_NOEXEC. 205 */ 206 if (p->p_ucred->cr_uid != 0) { 207 if (SCARG(uap, flags) & MNT_EXPORTED) { 208 vput(vp); 209 return (EPERM); 210 } 211 SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV; 212 if (flag & MNT_NOEXEC) 213 SCARG(uap, flags) |= MNT_NOEXEC; 214 } 215 if (vfs_busy(mp, LK_NOWAIT, 0)) { 216 vput(vp); 217 return (EPERM); 218 } 219 goto update; 220 } else { 221 if (securelevel >= 2) { 222 vput(vp); 223 return (EPERM); 224 } 225 } 226 /* 227 * If the user is not root, ensure that they own the directory 228 * onto which we are attempting to mount. 229 */ 230 if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) != 0 || 231 (va.va_uid != p->p_ucred->cr_uid && 232 (error = suser(p->p_ucred, &p->p_acflag)) != 0)) { 233 vput(vp); 234 return (error); 235 } 236 /* 237 * Do not allow NFS export by non-root users. For non-root users, 238 * silently enforce MNT_NOSUID and MNT_NODEV, and MNT_NOEXEC if the 239 * mount point is already MNT_NOEXEC. 240 */ 241 if (p->p_ucred->cr_uid != 0) { 242 if (SCARG(uap, flags) & MNT_EXPORTED) { 243 vput(vp); 244 return (EPERM); 245 } 246 SCARG(uap, flags) |= MNT_NOSUID | MNT_NODEV; 247 if (vp->v_mount->mnt_flag & MNT_NOEXEC) 248 SCARG(uap, flags) |= MNT_NOEXEC; 249 } 250 if ((error = vinvalbuf(vp, V_SAVE, p->p_ucred, p, 0, 0)) != 0) { 251 vput(vp); 252 return (error); 253 } 254 if (vp->v_type != VDIR) { 255 vput(vp); 256 return (ENOTDIR); 257 } 258 error = copyinstr(SCARG(uap, type), fstypename, MFSNAMELEN, NULL); 259 if (error) { 260 #if defined(COMPAT_09) || defined(COMPAT_43) 261 /* 262 * Historically filesystem types were identified by number. 263 * If we get an integer for the filesystem type instead of a 264 * string, we check to see if it matches one of the historic 265 * filesystem types. 266 */ 267 u_long fsindex = (u_long)SCARG(uap, type); 268 if (fsindex >= nmountcompatnames || 269 mountcompatnames[fsindex] == NULL) { 270 vput(vp); 271 return (ENODEV); 272 } 273 strncpy(fstypename, mountcompatnames[fsindex], MFSNAMELEN); 274 #else 275 vput(vp); 276 return (error); 277 #endif 278 } 279 #ifdef COMPAT_10 280 /* Accept `ufs' as an alias for `ffs'. */ 281 if (!strncmp(fstypename, "ufs", MFSNAMELEN)) 282 strncpy(fstypename, "ffs", MFSNAMELEN); 283 #endif 284 if ((vfs = vfs_getopsbyname(fstypename)) == NULL) { 285 vput(vp); 286 return (ENODEV); 287 } 288 if (vp->v_mountedhere != NULL) { 289 vput(vp); 290 return (EBUSY); 291 } 292 293 /* 294 * Allocate and initialize the file system. 295 */ 296 mp = (struct mount *)malloc((u_long)sizeof(struct mount), 297 M_MOUNT, M_WAITOK); 298 memset((char *)mp, 0, (u_long)sizeof(struct mount)); 299 lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, 0); 300 simple_lock_init(&mp->mnt_slock); 301 (void)vfs_busy(mp, LK_NOWAIT, 0); 302 mp->mnt_op = vfs; 303 vfs->vfs_refcount++; 304 mp->mnt_vnodecovered = vp; 305 mp->mnt_stat.f_owner = p->p_ucred->cr_uid; 306 mp->mnt_unmounter = NULL; 307 mp->mnt_leaf = mp; 308 309 /* 310 * The underlying file system may refuse the mount for 311 * various reasons. Allow the user to force it to happen. 312 */ 313 mp->mnt_flag |= SCARG(uap, flags) & MNT_FORCE; 314 update: 315 /* 316 * Set the mount level flags. 317 */ 318 if (SCARG(uap, flags) & MNT_RDONLY) 319 mp->mnt_flag |= MNT_RDONLY; 320 else if (mp->mnt_flag & MNT_RDONLY) 321 mp->mnt_iflag |= IMNT_WANTRDWR; 322 mp->mnt_flag &= 323 ~(MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | 324 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOCOREDUMP | 325 MNT_NOATIME | MNT_NODEVMTIME | MNT_SYMPERM | MNT_SOFTDEP); 326 mp->mnt_flag |= SCARG(uap, flags) & 327 (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV | 328 MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOCOREDUMP | 329 MNT_NOATIME | MNT_NODEVMTIME | MNT_SYMPERM | MNT_SOFTDEP | 330 MNT_IGNORE); 331 /* 332 * Mount the filesystem. 333 */ 334 error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p); 335 if (mp->mnt_flag & (MNT_UPDATE | MNT_GETARGS)) { 336 if (mp->mnt_iflag & IMNT_WANTRDWR) 337 mp->mnt_flag &= ~MNT_RDONLY; 338 if (error || (mp->mnt_flag & MNT_GETARGS)) 339 mp->mnt_flag = flag; 340 mp->mnt_flag &=~ 341 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 342 mp->mnt_iflag &=~ IMNT_WANTRDWR; 343 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) { 344 if (mp->mnt_syncer == NULL) 345 error = vfs_allocate_syncvnode(mp); 346 } else { 347 if (mp->mnt_syncer != NULL) 348 vfs_deallocate_syncvnode(mp); 349 } 350 vfs_unbusy(mp); 351 VOP_UNLOCK(vp, 0); 352 vrele(vp); 353 return (error); 354 } 355 /* 356 * Put the new filesystem on the mount list after root. 357 */ 358 cache_purge(vp); 359 if (!error) { 360 mp->mnt_flag &=~ 361 (MNT_RELOAD | MNT_FORCE | MNT_UPDATE | MNT_GETARGS); 362 mp->mnt_iflag &=~ IMNT_WANTRDWR; 363 vp->v_mountedhere = mp; 364 simple_lock(&mountlist_slock); 365 CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 366 simple_unlock(&mountlist_slock); 367 checkdirs(vp); 368 VOP_UNLOCK(vp, 0); 369 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) 370 error = vfs_allocate_syncvnode(mp); 371 vfs_unbusy(mp); 372 (void) VFS_STATVFS(mp, &mp->mnt_stat, p); 373 if ((error = VFS_START(mp, 0, p))) 374 vrele(vp); 375 } else { 376 vp->v_mountedhere = (struct mount *)0; 377 vfs->vfs_refcount--; 378 vfs_unbusy(mp); 379 free(mp, M_MOUNT); 380 vput(vp); 381 } 382 return (error); 383 } 384 385 /* 386 * Scan all active processes to see if any of them have a current 387 * or root directory onto which the new filesystem has just been 388 * mounted. If so, replace them with the new mount point. 389 */ 390 void 391 checkdirs(olddp) 392 struct vnode *olddp; 393 { 394 struct cwdinfo *cwdi; 395 struct vnode *newdp; 396 struct proc *p; 397 398 if (olddp->v_usecount == 1) 399 return; 400 if (VFS_ROOT(olddp->v_mountedhere, &newdp)) 401 panic("mount: lost mount"); 402 proclist_lock_read(); 403 PROCLIST_FOREACH(p, &allproc) { 404 cwdi = p->p_cwdi; 405 if (cwdi->cwdi_cdir == olddp) { 406 vrele(cwdi->cwdi_cdir); 407 VREF(newdp); 408 cwdi->cwdi_cdir = newdp; 409 } 410 if (cwdi->cwdi_rdir == olddp) { 411 vrele(cwdi->cwdi_rdir); 412 VREF(newdp); 413 cwdi->cwdi_rdir = newdp; 414 } 415 } 416 proclist_unlock_read(); 417 if (rootvnode == olddp) { 418 vrele(rootvnode); 419 VREF(newdp); 420 rootvnode = newdp; 421 } 422 vput(newdp); 423 } 424 425 /* 426 * Unmount a file system. 427 * 428 * Note: unmount takes a path to the vnode mounted on as argument, 429 * not special file (as before). 430 */ 431 /* ARGSUSED */ 432 int 433 sys_unmount(l, v, retval) 434 struct lwp *l; 435 void *v; 436 register_t *retval; 437 { 438 struct sys_unmount_args /* { 439 syscallarg(const char *) path; 440 syscallarg(int) flags; 441 } */ *uap = v; 442 struct proc *p = l->l_proc; 443 struct vnode *vp; 444 struct mount *mp; 445 int error; 446 struct nameidata nd; 447 448 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 449 SCARG(uap, path), p); 450 if ((error = namei(&nd)) != 0) 451 return (error); 452 vp = nd.ni_vp; 453 mp = vp->v_mount; 454 455 /* 456 * Only root, or the user that did the original mount is 457 * permitted to unmount this filesystem. 458 */ 459 if ((mp->mnt_stat.f_owner != p->p_ucred->cr_uid) && 460 (error = suser(p->p_ucred, &p->p_acflag)) != 0) { 461 vput(vp); 462 return (error); 463 } 464 465 /* 466 * Don't allow unmounting the root file system. 467 */ 468 if (mp->mnt_flag & MNT_ROOTFS) { 469 vput(vp); 470 return (EINVAL); 471 } 472 473 /* 474 * Must be the root of the filesystem 475 */ 476 if ((vp->v_flag & VROOT) == 0) { 477 vput(vp); 478 return (EINVAL); 479 } 480 vput(vp); 481 482 /* 483 * XXX Freeze syncer. Must do this before locking the 484 * mount point. See dounmount() for details. 485 */ 486 lockmgr(&syncer_lock, LK_EXCLUSIVE, NULL); 487 488 if (vfs_busy(mp, 0, 0)) { 489 lockmgr(&syncer_lock, LK_RELEASE, NULL); 490 return (EBUSY); 491 } 492 493 return (dounmount(mp, SCARG(uap, flags), p)); 494 } 495 496 /* 497 * Do the actual file system unmount. File system is assumed to have been 498 * marked busy by the caller. 499 */ 500 int 501 dounmount(mp, flags, p) 502 struct mount *mp; 503 int flags; 504 struct proc *p; 505 { 506 struct vnode *coveredvp; 507 int error; 508 int async; 509 int used_syncer; 510 511 simple_lock(&mountlist_slock); 512 vfs_unbusy(mp); 513 used_syncer = (mp->mnt_syncer != NULL); 514 515 /* 516 * XXX Syncer must be frozen when we get here. This should really 517 * be done on a per-mountpoint basis, but especially the softdep 518 * code possibly called from the syncer doens't exactly work on a 519 * per-mountpoint basis, so the softdep code would become a maze 520 * of vfs_busy() calls. 521 * 522 * The caller of dounmount() must acquire syncer_lock because 523 * the syncer itself acquires locks in syncer_lock -> vfs_busy 524 * order, and we must preserve that order to avoid deadlock. 525 * 526 * So, if the file system did not use the syncer, now is 527 * the time to release the syncer_lock. 528 */ 529 if (used_syncer == 0) 530 lockmgr(&syncer_lock, LK_RELEASE, NULL); 531 532 mp->mnt_iflag |= IMNT_UNMOUNT; 533 mp->mnt_unmounter = p; 534 lockmgr(&mp->mnt_lock, LK_DRAIN | LK_INTERLOCK, &mountlist_slock); 535 vn_start_write(NULL, &mp, V_WAIT); 536 537 if (mp->mnt_flag & MNT_EXPUBLIC) 538 vfs_setpublicfs(NULL, NULL, NULL); 539 async = mp->mnt_flag & MNT_ASYNC; 540 mp->mnt_flag &= ~MNT_ASYNC; 541 cache_purgevfs(mp); /* remove cache entries for this file sys */ 542 if (mp->mnt_syncer != NULL) 543 vfs_deallocate_syncvnode(mp); 544 error = 0; 545 if ((mp->mnt_flag & MNT_RDONLY) == 0) { 546 #if NFSS > 0 547 error = fss_umount_hook(mp, (flags & MNT_FORCE)); 548 #endif 549 if (error == 0) 550 error = VFS_SYNC(mp, MNT_WAIT, p->p_ucred, p); 551 } 552 if (error == 0 || (flags & MNT_FORCE)) 553 error = VFS_UNMOUNT(mp, flags, p); 554 vn_finished_write(mp, 0); 555 simple_lock(&mountlist_slock); 556 if (error) { 557 if ((mp->mnt_flag & (MNT_RDONLY | MNT_ASYNC)) == 0) 558 (void) vfs_allocate_syncvnode(mp); 559 mp->mnt_iflag &= ~IMNT_UNMOUNT; 560 mp->mnt_unmounter = NULL; 561 mp->mnt_flag |= async; 562 lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK | LK_REENABLE, 563 &mountlist_slock); 564 if (used_syncer) 565 lockmgr(&syncer_lock, LK_RELEASE, NULL); 566 simple_lock(&mp->mnt_slock); 567 while (mp->mnt_wcnt > 0) { 568 wakeup(mp); 569 ltsleep(&mp->mnt_wcnt, PVFS, "mntwcnt1", 570 0, &mp->mnt_slock); 571 } 572 simple_unlock(&mp->mnt_slock); 573 return (error); 574 } 575 CIRCLEQ_REMOVE(&mountlist, mp, mnt_list); 576 if ((coveredvp = mp->mnt_vnodecovered) != NULLVP) { 577 coveredvp->v_mountedhere = NULL; 578 vrele(coveredvp); 579 } 580 mp->mnt_op->vfs_refcount--; 581 if (LIST_FIRST(&mp->mnt_vnodelist) != NULL) 582 panic("unmount: dangling vnode"); 583 mp->mnt_iflag |= IMNT_GONE; 584 lockmgr(&mp->mnt_lock, LK_RELEASE | LK_INTERLOCK, &mountlist_slock); 585 if (used_syncer) 586 lockmgr(&syncer_lock, LK_RELEASE, NULL); 587 simple_lock(&mp->mnt_slock); 588 while (mp->mnt_wcnt > 0) { 589 wakeup(mp); 590 ltsleep(&mp->mnt_wcnt, PVFS, "mntwcnt2", 0, &mp->mnt_slock); 591 } 592 simple_unlock(&mp->mnt_slock); 593 free(mp, M_MOUNT); 594 return (0); 595 } 596 597 /* 598 * Sync each mounted filesystem. 599 */ 600 #ifdef DEBUG 601 int syncprt = 0; 602 struct ctldebug debug0 = { "syncprt", &syncprt }; 603 #endif 604 605 /* ARGSUSED */ 606 int 607 sys_sync(l, v, retval) 608 struct lwp *l; 609 void *v; 610 register_t *retval; 611 { 612 struct mount *mp, *nmp; 613 int asyncflag; 614 struct proc *p = l == NULL ? &proc0 : l->l_proc; 615 616 simple_lock(&mountlist_slock); 617 for (mp = mountlist.cqh_last; mp != (void *)&mountlist; mp = nmp) { 618 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 619 nmp = mp->mnt_list.cqe_prev; 620 continue; 621 } 622 if ((mp->mnt_flag & MNT_RDONLY) == 0 && 623 vn_start_write(NULL, &mp, V_NOWAIT) == 0) { 624 asyncflag = mp->mnt_flag & MNT_ASYNC; 625 mp->mnt_flag &= ~MNT_ASYNC; 626 VFS_SYNC(mp, MNT_NOWAIT, p->p_ucred, p); 627 if (asyncflag) 628 mp->mnt_flag |= MNT_ASYNC; 629 vn_finished_write(mp, 0); 630 } 631 simple_lock(&mountlist_slock); 632 nmp = mp->mnt_list.cqe_prev; 633 vfs_unbusy(mp); 634 635 } 636 simple_unlock(&mountlist_slock); 637 #ifdef DEBUG 638 if (syncprt) 639 vfs_bufstats(); 640 #endif /* DEBUG */ 641 return (0); 642 } 643 644 /* 645 * Change filesystem quotas. 646 */ 647 /* ARGSUSED */ 648 int 649 sys_quotactl(l, v, retval) 650 struct lwp *l; 651 void *v; 652 register_t *retval; 653 { 654 struct sys_quotactl_args /* { 655 syscallarg(const char *) path; 656 syscallarg(int) cmd; 657 syscallarg(int) uid; 658 syscallarg(caddr_t) arg; 659 } */ *uap = v; 660 struct proc *p = l->l_proc; 661 struct mount *mp; 662 int error; 663 struct nameidata nd; 664 665 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 666 if ((error = namei(&nd)) != 0) 667 return (error); 668 error = vn_start_write(nd.ni_vp, &mp, V_WAIT | V_PCATCH); 669 vrele(nd.ni_vp); 670 if (error) 671 return (error); 672 error = VFS_QUOTACTL(mp, SCARG(uap, cmd), SCARG(uap, uid), 673 SCARG(uap, arg), p); 674 vn_finished_write(mp, 0); 675 return (error); 676 } 677 678 int 679 dostatvfs(struct mount *mp, struct statvfs *sp, struct proc *p, int flags, 680 int root) 681 { 682 struct cwdinfo *cwdi = p->p_cwdi; 683 int error = 0; 684 685 /* 686 * If MNT_NOWAIT or MNT_LAZY is specified, do not 687 * refresh the fsstat cache. MNT_WAIT or MNT_LAZY 688 * overrides MNT_NOWAIT. 689 */ 690 if (flags == MNT_NOWAIT || flags == MNT_LAZY || 691 (flags != MNT_WAIT && flags != 0)) { 692 memcpy(sp, &mp->mnt_stat, sizeof(*sp)); 693 goto done; 694 } 695 696 /* Get the filesystem stats now */ 697 memset(sp, 0, sizeof(*sp)); 698 if ((error = VFS_STATVFS(mp, sp, p)) != 0) { 699 return error; 700 } 701 702 if (cwdi->cwdi_rdir == NULL) 703 (void)memcpy(&mp->mnt_stat, sp, sizeof(mp->mnt_stat)); 704 done: 705 if (cwdi->cwdi_rdir != NULL) { 706 size_t len; 707 char *bp; 708 char *path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 709 if (!path) 710 return ENOMEM; 711 712 bp = path + MAXPATHLEN; 713 *--bp = '\0'; 714 error = getcwd_common(cwdi->cwdi_rdir, rootvnode, &bp, path, 715 MAXPATHLEN / 2, 0, p); 716 if (error) { 717 free(path, M_TEMP); 718 return error; 719 } 720 len = strlen(bp); 721 /* 722 * for mount points that are below our root, we can see 723 * them, so we fix up the pathname and return them. The 724 * rest we cannot see, so we don't allow viewing the 725 * data. 726 */ 727 if (strncmp(bp, sp->f_mntonname, len) == 0) { 728 strlcpy(sp->f_mntonname, &sp->f_mntonname[len], 729 sizeof(sp->f_mntonname)); 730 if (sp->f_mntonname[0] == '\0') 731 (void)strlcpy(sp->f_mntonname, "/", 732 sizeof(sp->f_mntonname)); 733 } else { 734 if (root) 735 (void)strlcpy(sp->f_mntonname, "/", 736 sizeof(sp->f_mntonname)); 737 else 738 error = EPERM; 739 } 740 free(path, M_TEMP); 741 } 742 sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK; 743 return error; 744 } 745 746 /* 747 * Get filesystem statistics. 748 */ 749 /* ARGSUSED */ 750 int 751 sys_statvfs1(l, v, retval) 752 struct lwp *l; 753 void *v; 754 register_t *retval; 755 { 756 struct sys_statvfs1_args /* { 757 syscallarg(const char *) path; 758 syscallarg(struct statvfs *) buf; 759 syscallarg(int) flags; 760 } */ *uap = v; 761 struct proc *p = l->l_proc; 762 struct mount *mp; 763 struct statvfs sbuf; 764 int error; 765 struct nameidata nd; 766 767 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 768 if ((error = namei(&nd)) != 0) 769 return error; 770 mp = nd.ni_vp->v_mount; 771 vrele(nd.ni_vp); 772 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0) 773 return error; 774 return copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 775 } 776 777 /* 778 * Get filesystem statistics. 779 */ 780 /* ARGSUSED */ 781 int 782 sys_fstatvfs1(l, v, retval) 783 struct lwp *l; 784 void *v; 785 register_t *retval; 786 { 787 struct sys_fstatvfs1_args /* { 788 syscallarg(int) fd; 789 syscallarg(struct statvfs *) buf; 790 syscallarg(int) flags; 791 } */ *uap = v; 792 struct proc *p = l->l_proc; 793 struct file *fp; 794 struct mount *mp; 795 struct statvfs sbuf; 796 int error; 797 798 /* getvnode() will use the descriptor for us */ 799 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 800 return (error); 801 mp = ((struct vnode *)fp->f_data)->v_mount; 802 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0) 803 goto out; 804 error = copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 805 out: 806 FILE_UNUSE(fp, p); 807 return error; 808 } 809 810 811 /* 812 * Get statistics on all filesystems. 813 */ 814 int 815 sys_getvfsstat(l, v, retval) 816 struct lwp *l; 817 void *v; 818 register_t *retval; 819 { 820 struct sys_getvfsstat_args /* { 821 syscallarg(struct statvfs *) buf; 822 syscallarg(size_t) bufsize; 823 syscallarg(int) flags; 824 } */ *uap = v; 825 int root = 0; 826 struct proc *p = l->l_proc; 827 struct mount *mp, *nmp; 828 struct statvfs sbuf; 829 struct statvfs *sfsp; 830 size_t count, maxcount; 831 int error = 0; 832 833 maxcount = SCARG(uap, bufsize) / sizeof(struct statvfs); 834 sfsp = SCARG(uap, buf); 835 simple_lock(&mountlist_slock); 836 count = 0; 837 for (mp = CIRCLEQ_FIRST(&mountlist); mp != (void *)&mountlist; 838 mp = nmp) { 839 if (vfs_busy(mp, LK_NOWAIT, &mountlist_slock)) { 840 nmp = CIRCLEQ_NEXT(mp, mnt_list); 841 continue; 842 } 843 if (sfsp && count < maxcount) { 844 error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 0); 845 if (error) { 846 simple_lock(&mountlist_slock); 847 nmp = CIRCLEQ_NEXT(mp, mnt_list); 848 vfs_unbusy(mp); 849 continue; 850 } 851 error = copyout(&sbuf, sfsp, sizeof(*sfsp)); 852 if (error) { 853 vfs_unbusy(mp); 854 return (error); 855 } 856 sfsp++; 857 root |= strcmp(sbuf.f_mntonname, "/") == 0; 858 } 859 count++; 860 simple_lock(&mountlist_slock); 861 nmp = CIRCLEQ_NEXT(mp, mnt_list); 862 vfs_unbusy(mp); 863 } 864 simple_unlock(&mountlist_slock); 865 if (root == 0 && p->p_cwdi->cwdi_rdir) { 866 /* 867 * fake a root entry 868 */ 869 if ((error = dostatvfs(p->p_cwdi->cwdi_rdir->v_mount, &sbuf, p, 870 SCARG(uap, flags), 1)) != 0) 871 return error; 872 if (sfsp) 873 error = copyout(&sbuf, sfsp, sizeof(*sfsp)); 874 count++; 875 } 876 if (sfsp && count > maxcount) 877 *retval = maxcount; 878 else 879 *retval = count; 880 return error; 881 } 882 883 /* 884 * Change current working directory to a given file descriptor. 885 */ 886 /* ARGSUSED */ 887 int 888 sys_fchdir(l, v, retval) 889 struct lwp *l; 890 void *v; 891 register_t *retval; 892 { 893 struct sys_fchdir_args /* { 894 syscallarg(int) fd; 895 } */ *uap = v; 896 struct proc *p = l->l_proc; 897 struct filedesc *fdp = p->p_fd; 898 struct cwdinfo *cwdi = p->p_cwdi; 899 struct vnode *vp, *tdp; 900 struct mount *mp; 901 struct file *fp; 902 int error; 903 904 /* getvnode() will use the descriptor for us */ 905 if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0) 906 return (error); 907 vp = (struct vnode *)fp->f_data; 908 909 VREF(vp); 910 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 911 if (vp->v_type != VDIR) 912 error = ENOTDIR; 913 else 914 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); 915 while (!error && (mp = vp->v_mountedhere) != NULL) { 916 if (vfs_busy(mp, 0, 0)) 917 continue; 918 error = VFS_ROOT(mp, &tdp); 919 vfs_unbusy(mp); 920 if (error) 921 break; 922 vput(vp); 923 vp = tdp; 924 } 925 if (error) { 926 vput(vp); 927 goto out; 928 } 929 VOP_UNLOCK(vp, 0); 930 931 /* 932 * Disallow changing to a directory not under the process's 933 * current root directory (if there is one). 934 */ 935 if (cwdi->cwdi_rdir && !vn_isunder(vp, NULL, p)) { 936 vrele(vp); 937 error = EPERM; /* operation not permitted */ 938 goto out; 939 } 940 941 vrele(cwdi->cwdi_cdir); 942 cwdi->cwdi_cdir = vp; 943 out: 944 FILE_UNUSE(fp, p); 945 return (error); 946 } 947 948 /* 949 * Change this process's notion of the root directory to a given file descriptor. 950 */ 951 952 int 953 sys_fchroot(l, v, retval) 954 struct lwp *l; 955 void *v; 956 register_t *retval; 957 { 958 struct sys_fchroot_args *uap = v; 959 struct proc *p = l->l_proc; 960 struct filedesc *fdp = p->p_fd; 961 struct cwdinfo *cwdi = p->p_cwdi; 962 struct vnode *vp; 963 struct file *fp; 964 int error; 965 966 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 967 return error; 968 /* getvnode() will use the descriptor for us */ 969 if ((error = getvnode(fdp, SCARG(uap, fd), &fp)) != 0) 970 return error; 971 vp = (struct vnode *) fp->f_data; 972 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 973 if (vp->v_type != VDIR) 974 error = ENOTDIR; 975 else 976 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); 977 VOP_UNLOCK(vp, 0); 978 if (error) 979 goto out; 980 VREF(vp); 981 982 /* 983 * Prevent escaping from chroot by putting the root under 984 * the working directory. Silently chdir to / if we aren't 985 * already there. 986 */ 987 if (!vn_isunder(cwdi->cwdi_cdir, vp, p)) { 988 /* 989 * XXX would be more failsafe to change directory to a 990 * deadfs node here instead 991 */ 992 vrele(cwdi->cwdi_cdir); 993 VREF(vp); 994 cwdi->cwdi_cdir = vp; 995 } 996 997 if (cwdi->cwdi_rdir != NULL) 998 vrele(cwdi->cwdi_rdir); 999 cwdi->cwdi_rdir = vp; 1000 out: 1001 FILE_UNUSE(fp, p); 1002 return (error); 1003 } 1004 1005 1006 1007 /* 1008 * Change current working directory (``.''). 1009 */ 1010 /* ARGSUSED */ 1011 int 1012 sys_chdir(l, v, retval) 1013 struct lwp *l; 1014 void *v; 1015 register_t *retval; 1016 { 1017 struct sys_chdir_args /* { 1018 syscallarg(const char *) path; 1019 } */ *uap = v; 1020 struct proc *p = l->l_proc; 1021 struct cwdinfo *cwdi = p->p_cwdi; 1022 int error; 1023 struct nameidata nd; 1024 1025 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1026 SCARG(uap, path), p); 1027 if ((error = change_dir(&nd, p)) != 0) 1028 return (error); 1029 vrele(cwdi->cwdi_cdir); 1030 cwdi->cwdi_cdir = nd.ni_vp; 1031 return (0); 1032 } 1033 1034 /* 1035 * Change notion of root (``/'') directory. 1036 */ 1037 /* ARGSUSED */ 1038 int 1039 sys_chroot(l, v, retval) 1040 struct lwp *l; 1041 void *v; 1042 register_t *retval; 1043 { 1044 struct sys_chroot_args /* { 1045 syscallarg(const char *) path; 1046 } */ *uap = v; 1047 struct proc *p = l->l_proc; 1048 struct cwdinfo *cwdi = p->p_cwdi; 1049 struct vnode *vp; 1050 int error; 1051 struct nameidata nd; 1052 1053 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1054 return (error); 1055 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1056 SCARG(uap, path), p); 1057 if ((error = change_dir(&nd, p)) != 0) 1058 return (error); 1059 if (cwdi->cwdi_rdir != NULL) 1060 vrele(cwdi->cwdi_rdir); 1061 vp = nd.ni_vp; 1062 cwdi->cwdi_rdir = vp; 1063 1064 /* 1065 * Prevent escaping from chroot by putting the root under 1066 * the working directory. Silently chdir to / if we aren't 1067 * already there. 1068 */ 1069 if (!vn_isunder(cwdi->cwdi_cdir, vp, p)) { 1070 /* 1071 * XXX would be more failsafe to change directory to a 1072 * deadfs node here instead 1073 */ 1074 vrele(cwdi->cwdi_cdir); 1075 VREF(vp); 1076 cwdi->cwdi_cdir = vp; 1077 } 1078 1079 return (0); 1080 } 1081 1082 /* 1083 * Common routine for chroot and chdir. 1084 */ 1085 static int 1086 change_dir(ndp, p) 1087 struct nameidata *ndp; 1088 struct proc *p; 1089 { 1090 struct vnode *vp; 1091 int error; 1092 1093 if ((error = namei(ndp)) != 0) 1094 return (error); 1095 vp = ndp->ni_vp; 1096 if (vp->v_type != VDIR) 1097 error = ENOTDIR; 1098 else 1099 error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p); 1100 1101 if (error) 1102 vput(vp); 1103 else 1104 VOP_UNLOCK(vp, 0); 1105 return (error); 1106 } 1107 1108 /* 1109 * Check permissions, allocate an open file structure, 1110 * and call the device open routine if any. 1111 */ 1112 int 1113 sys_open(l, v, retval) 1114 struct lwp *l; 1115 void *v; 1116 register_t *retval; 1117 { 1118 struct sys_open_args /* { 1119 syscallarg(const char *) path; 1120 syscallarg(int) flags; 1121 syscallarg(int) mode; 1122 } */ *uap = v; 1123 struct proc *p = l->l_proc; 1124 struct cwdinfo *cwdi = p->p_cwdi; 1125 struct filedesc *fdp = p->p_fd; 1126 struct file *fp; 1127 struct vnode *vp; 1128 int flags, cmode; 1129 int type, indx, error; 1130 struct flock lf; 1131 struct nameidata nd; 1132 1133 flags = FFLAGS(SCARG(uap, flags)); 1134 if ((flags & (FREAD | FWRITE)) == 0) 1135 return (EINVAL); 1136 /* falloc() will use the file descriptor for us */ 1137 if ((error = falloc(p, &fp, &indx)) != 0) 1138 return (error); 1139 cmode = ((SCARG(uap, mode) &~ cwdi->cwdi_cmask) & ALLPERMS) &~ S_ISTXT; 1140 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 1141 l->l_dupfd = -indx - 1; /* XXX check for fdopen */ 1142 if ((error = vn_open(&nd, flags, cmode)) != 0) { 1143 FILE_UNUSE(fp, p); 1144 fdp->fd_ofiles[indx] = NULL; 1145 ffree(fp); 1146 if ((error == EDUPFD || error == EMOVEFD) && 1147 l->l_dupfd >= 0 && /* XXX from fdopen */ 1148 (error = 1149 dupfdopen(p, indx, l->l_dupfd, flags, error)) == 0) { 1150 *retval = indx; 1151 return (0); 1152 } 1153 if (error == ERESTART) 1154 error = EINTR; 1155 fdremove(fdp, indx); 1156 return (error); 1157 } 1158 l->l_dupfd = 0; 1159 vp = nd.ni_vp; 1160 fp->f_flag = flags & FMASK; 1161 fp->f_type = DTYPE_VNODE; 1162 fp->f_ops = &vnops; 1163 fp->f_data = vp; 1164 if (flags & (O_EXLOCK | O_SHLOCK)) { 1165 lf.l_whence = SEEK_SET; 1166 lf.l_start = 0; 1167 lf.l_len = 0; 1168 if (flags & O_EXLOCK) 1169 lf.l_type = F_WRLCK; 1170 else 1171 lf.l_type = F_RDLCK; 1172 type = F_FLOCK; 1173 if ((flags & FNONBLOCK) == 0) 1174 type |= F_WAIT; 1175 VOP_UNLOCK(vp, 0); 1176 error = VOP_ADVLOCK(vp, fp, F_SETLK, &lf, type); 1177 if (error) { 1178 (void) vn_close(vp, fp->f_flag, fp->f_cred, p); 1179 FILE_UNUSE(fp, p); 1180 ffree(fp); 1181 fdremove(fdp, indx); 1182 return (error); 1183 } 1184 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1185 fp->f_flag |= FHASLOCK; 1186 } 1187 VOP_UNLOCK(vp, 0); 1188 *retval = indx; 1189 FILE_SET_MATURE(fp); 1190 FILE_UNUSE(fp, p); 1191 return (0); 1192 } 1193 1194 /* 1195 * Get file handle system call 1196 */ 1197 int 1198 sys_getfh(l, v, retval) 1199 struct lwp *l; 1200 void *v; 1201 register_t *retval; 1202 { 1203 struct sys_getfh_args /* { 1204 syscallarg(char *) fname; 1205 syscallarg(fhandle_t *) fhp; 1206 } */ *uap = v; 1207 struct proc *p = l->l_proc; 1208 struct vnode *vp; 1209 fhandle_t fh; 1210 int error; 1211 struct nameidata nd; 1212 1213 /* 1214 * Must be super user 1215 */ 1216 error = suser(p->p_ucred, &p->p_acflag); 1217 if (error) 1218 return (error); 1219 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 1220 SCARG(uap, fname), p); 1221 error = namei(&nd); 1222 if (error) 1223 return (error); 1224 vp = nd.ni_vp; 1225 memset(&fh, 0, sizeof(fh)); 1226 fh.fh_fsid = vp->v_mount->mnt_stat.f_fsidx; 1227 error = VFS_VPTOFH(vp, &fh.fh_fid); 1228 vput(vp); 1229 if (error) 1230 return (error); 1231 error = copyout(&fh, (caddr_t)SCARG(uap, fhp), sizeof (fh)); 1232 return (error); 1233 } 1234 1235 /* 1236 * Open a file given a file handle. 1237 * 1238 * Check permissions, allocate an open file structure, 1239 * and call the device open routine if any. 1240 */ 1241 int 1242 sys_fhopen(l, v, retval) 1243 struct lwp *l; 1244 void *v; 1245 register_t *retval; 1246 { 1247 struct sys_fhopen_args /* { 1248 syscallarg(const fhandle_t *) fhp; 1249 syscallarg(int) flags; 1250 } */ *uap = v; 1251 struct proc *p = l->l_proc; 1252 struct filedesc *fdp = p->p_fd; 1253 struct file *fp; 1254 struct vnode *vp = NULL; 1255 struct mount *mp; 1256 struct ucred *cred = p->p_ucred; 1257 int flags; 1258 struct file *nfp; 1259 int type, indx, error=0; 1260 struct flock lf; 1261 struct vattr va; 1262 fhandle_t fh; 1263 1264 /* 1265 * Must be super user 1266 */ 1267 if ((error = suser(p->p_ucred, &p->p_acflag))) 1268 return (error); 1269 1270 flags = FFLAGS(SCARG(uap, flags)); 1271 if ((flags & (FREAD | FWRITE)) == 0) 1272 return (EINVAL); 1273 if ((flags & O_CREAT)) 1274 return (EINVAL); 1275 /* falloc() will use the file descriptor for us */ 1276 if ((error = falloc(p, &nfp, &indx)) != 0) 1277 return (error); 1278 fp = nfp; 1279 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1280 goto bad; 1281 1282 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) { 1283 error = ESTALE; 1284 goto bad; 1285 } 1286 1287 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)) != 0) { 1288 vp = NULL; /* most likely unnecessary sanity for bad: */ 1289 goto bad; 1290 } 1291 1292 /* Now do an effective vn_open */ 1293 1294 if (vp->v_type == VSOCK) { 1295 error = EOPNOTSUPP; 1296 goto bad; 1297 } 1298 if (flags & FREAD) { 1299 if ((error = VOP_ACCESS(vp, VREAD, cred, p)) != 0) 1300 goto bad; 1301 } 1302 if (flags & (FWRITE | O_TRUNC)) { 1303 if (vp->v_type == VDIR) { 1304 error = EISDIR; 1305 goto bad; 1306 } 1307 if ((error = vn_writechk(vp)) != 0 || 1308 (error = VOP_ACCESS(vp, VWRITE, cred, p)) != 0) 1309 goto bad; 1310 } 1311 if (flags & O_TRUNC) { 1312 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 1313 goto bad; 1314 VOP_UNLOCK(vp, 0); /* XXX */ 1315 VOP_LEASE(vp, p, cred, LEASE_WRITE); 1316 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); /* XXX */ 1317 VATTR_NULL(&va); 1318 va.va_size = 0; 1319 error = VOP_SETATTR(vp, &va, cred, p); 1320 vn_finished_write(mp, 0); 1321 if (error) 1322 goto bad; 1323 } 1324 if ((error = VOP_OPEN(vp, flags, cred, p)) != 0) 1325 goto bad; 1326 if (vp->v_type == VREG && 1327 uvn_attach(vp, flags & FWRITE ? VM_PROT_WRITE : 0) == NULL) { 1328 error = EIO; 1329 goto bad; 1330 } 1331 if (flags & FWRITE) 1332 vp->v_writecount++; 1333 1334 /* done with modified vn_open, now finish what sys_open does. */ 1335 1336 fp->f_flag = flags & FMASK; 1337 fp->f_type = DTYPE_VNODE; 1338 fp->f_ops = &vnops; 1339 fp->f_data = vp; 1340 if (flags & (O_EXLOCK | O_SHLOCK)) { 1341 lf.l_whence = SEEK_SET; 1342 lf.l_start = 0; 1343 lf.l_len = 0; 1344 if (flags & O_EXLOCK) 1345 lf.l_type = F_WRLCK; 1346 else 1347 lf.l_type = F_RDLCK; 1348 type = F_FLOCK; 1349 if ((flags & FNONBLOCK) == 0) 1350 type |= F_WAIT; 1351 VOP_UNLOCK(vp, 0); 1352 error = VOP_ADVLOCK(vp, fp, F_SETLK, &lf, type); 1353 if (error) { 1354 (void) vn_close(vp, fp->f_flag, fp->f_cred, p); 1355 FILE_UNUSE(fp, p); 1356 ffree(fp); 1357 fdremove(fdp, indx); 1358 return (error); 1359 } 1360 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 1361 fp->f_flag |= FHASLOCK; 1362 } 1363 VOP_UNLOCK(vp, 0); 1364 *retval = indx; 1365 FILE_SET_MATURE(fp); 1366 FILE_UNUSE(fp, p); 1367 return (0); 1368 1369 bad: 1370 FILE_UNUSE(fp, p); 1371 ffree(fp); 1372 fdremove(fdp, indx); 1373 if (vp != NULL) 1374 vput(vp); 1375 return (error); 1376 } 1377 1378 /* ARGSUSED */ 1379 int 1380 sys_fhstat(l, v, retval) 1381 struct lwp *l; 1382 void *v; 1383 register_t *retval; 1384 { 1385 struct sys_fhstat_args /* { 1386 syscallarg(const fhandle_t *) fhp; 1387 syscallarg(struct stat *) sb; 1388 } */ *uap = v; 1389 struct proc *p = l->l_proc; 1390 struct stat sb; 1391 int error; 1392 fhandle_t fh; 1393 struct mount *mp; 1394 struct vnode *vp; 1395 1396 /* 1397 * Must be super user 1398 */ 1399 if ((error = suser(p->p_ucred, &p->p_acflag))) 1400 return (error); 1401 1402 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1403 return (error); 1404 1405 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) 1406 return (ESTALE); 1407 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp))) 1408 return (error); 1409 error = vn_stat(vp, &sb, p); 1410 vput(vp); 1411 if (error) 1412 return (error); 1413 error = copyout(&sb, SCARG(uap, sb), sizeof(sb)); 1414 return (error); 1415 } 1416 1417 /* ARGSUSED */ 1418 int 1419 sys_fhstatvfs1(l, v, retval) 1420 struct lwp *l; 1421 void *v; 1422 register_t *retval; 1423 { 1424 struct sys_fhstatvfs1_args /* 1425 syscallarg(const fhandle_t *) fhp; 1426 syscallarg(struct statvfs *) buf; 1427 syscallarg(int) flags; 1428 } */ *uap = v; 1429 struct proc *p = l->l_proc; 1430 struct statvfs sbuf; 1431 fhandle_t fh; 1432 struct mount *mp; 1433 struct vnode *vp; 1434 int error; 1435 1436 /* 1437 * Must be super user 1438 */ 1439 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1440 return error; 1441 1442 if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0) 1443 return error; 1444 1445 if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL) 1446 return ESTALE; 1447 if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp))) 1448 return error; 1449 1450 mp = vp->v_mount; 1451 if ((error = dostatvfs(mp, &sbuf, p, SCARG(uap, flags), 1)) != 0) { 1452 vput(vp); 1453 return error; 1454 } 1455 vput(vp); 1456 return copyout(&sbuf, SCARG(uap, buf), sizeof(sbuf)); 1457 } 1458 1459 /* 1460 * Create a special file. 1461 */ 1462 /* ARGSUSED */ 1463 int 1464 sys_mknod(l, v, retval) 1465 struct lwp *l; 1466 void *v; 1467 register_t *retval; 1468 { 1469 struct sys_mknod_args /* { 1470 syscallarg(const char *) path; 1471 syscallarg(int) mode; 1472 syscallarg(int) dev; 1473 } */ *uap = v; 1474 struct proc *p = l->l_proc; 1475 struct vnode *vp; 1476 struct mount *mp; 1477 struct vattr vattr; 1478 int error; 1479 int whiteout = 0; 1480 struct nameidata nd; 1481 1482 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 1483 return (error); 1484 restart: 1485 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p); 1486 if ((error = namei(&nd)) != 0) 1487 return (error); 1488 vp = nd.ni_vp; 1489 if (vp != NULL) 1490 error = EEXIST; 1491 else { 1492 VATTR_NULL(&vattr); 1493 vattr.va_mode = 1494 (SCARG(uap, mode) & ALLPERMS) &~ p->p_cwdi->cwdi_cmask; 1495 vattr.va_rdev = SCARG(uap, dev); 1496 whiteout = 0; 1497 1498 switch (SCARG(uap, mode) & S_IFMT) { 1499 case S_IFMT: /* used by badsect to flag bad sectors */ 1500 vattr.va_type = VBAD; 1501 break; 1502 case S_IFCHR: 1503 vattr.va_type = VCHR; 1504 break; 1505 case S_IFBLK: 1506 vattr.va_type = VBLK; 1507 break; 1508 case S_IFWHT: 1509 whiteout = 1; 1510 break; 1511 default: 1512 error = EINVAL; 1513 break; 1514 } 1515 } 1516 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1517 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1518 if (nd.ni_dvp == vp) 1519 vrele(nd.ni_dvp); 1520 else 1521 vput(nd.ni_dvp); 1522 if (vp) 1523 vrele(vp); 1524 if ((error = vn_start_write(NULL, &mp, 1525 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1526 return (error); 1527 goto restart; 1528 } 1529 if (!error) { 1530 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1531 if (whiteout) { 1532 error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE); 1533 if (error) 1534 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1535 vput(nd.ni_dvp); 1536 } else { 1537 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, 1538 &nd.ni_cnd, &vattr); 1539 if (error == 0) 1540 vput(nd.ni_vp); 1541 } 1542 } else { 1543 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1544 if (nd.ni_dvp == vp) 1545 vrele(nd.ni_dvp); 1546 else 1547 vput(nd.ni_dvp); 1548 if (vp) 1549 vrele(vp); 1550 } 1551 vn_finished_write(mp, 0); 1552 return (error); 1553 } 1554 1555 /* 1556 * Create a named pipe. 1557 */ 1558 /* ARGSUSED */ 1559 int 1560 sys_mkfifo(l, v, retval) 1561 struct lwp *l; 1562 void *v; 1563 register_t *retval; 1564 { 1565 struct sys_mkfifo_args /* { 1566 syscallarg(const char *) path; 1567 syscallarg(int) mode; 1568 } */ *uap = v; 1569 struct proc *p = l->l_proc; 1570 struct mount *mp; 1571 struct vattr vattr; 1572 int error; 1573 struct nameidata nd; 1574 1575 restart: 1576 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, path), p); 1577 if ((error = namei(&nd)) != 0) 1578 return (error); 1579 if (nd.ni_vp != NULL) { 1580 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1581 if (nd.ni_dvp == nd.ni_vp) 1582 vrele(nd.ni_dvp); 1583 else 1584 vput(nd.ni_dvp); 1585 vrele(nd.ni_vp); 1586 return (EEXIST); 1587 } 1588 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1589 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1590 if (nd.ni_dvp == nd.ni_vp) 1591 vrele(nd.ni_dvp); 1592 else 1593 vput(nd.ni_dvp); 1594 if (nd.ni_vp) 1595 vrele(nd.ni_vp); 1596 if ((error = vn_start_write(NULL, &mp, 1597 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1598 return (error); 1599 goto restart; 1600 } 1601 VATTR_NULL(&vattr); 1602 vattr.va_type = VFIFO; 1603 vattr.va_mode = (SCARG(uap, mode) & ALLPERMS) &~ p->p_cwdi->cwdi_cmask; 1604 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1605 error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); 1606 if (error == 0) 1607 vput(nd.ni_vp); 1608 vn_finished_write(mp, 0); 1609 return (error); 1610 } 1611 1612 /* 1613 * Make a hard file link. 1614 */ 1615 /* ARGSUSED */ 1616 int 1617 sys_link(l, v, retval) 1618 struct lwp *l; 1619 void *v; 1620 register_t *retval; 1621 { 1622 struct sys_link_args /* { 1623 syscallarg(const char *) path; 1624 syscallarg(const char *) link; 1625 } */ *uap = v; 1626 struct proc *p = l->l_proc; 1627 struct vnode *vp; 1628 struct mount *mp; 1629 struct nameidata nd; 1630 int error; 1631 1632 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 1633 if ((error = namei(&nd)) != 0) 1634 return (error); 1635 vp = nd.ni_vp; 1636 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 1637 vrele(vp); 1638 return (error); 1639 } 1640 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p); 1641 if ((error = namei(&nd)) != 0) 1642 goto out; 1643 if (nd.ni_vp) { 1644 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1645 if (nd.ni_dvp == nd.ni_vp) 1646 vrele(nd.ni_dvp); 1647 else 1648 vput(nd.ni_dvp); 1649 vrele(nd.ni_vp); 1650 error = EEXIST; 1651 goto out; 1652 } 1653 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1654 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 1655 error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); 1656 out: 1657 vrele(vp); 1658 vn_finished_write(mp, 0); 1659 return (error); 1660 } 1661 1662 /* 1663 * Make a symbolic link. 1664 */ 1665 /* ARGSUSED */ 1666 int 1667 sys_symlink(l, v, retval) 1668 struct lwp *l; 1669 void *v; 1670 register_t *retval; 1671 { 1672 struct sys_symlink_args /* { 1673 syscallarg(const char *) path; 1674 syscallarg(const char *) link; 1675 } */ *uap = v; 1676 struct proc *p = l->l_proc; 1677 struct mount *mp; 1678 struct vattr vattr; 1679 char *path; 1680 int error; 1681 struct nameidata nd; 1682 1683 path = PNBUF_GET(); 1684 error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL); 1685 if (error) 1686 goto out; 1687 restart: 1688 NDINIT(&nd, CREATE, LOCKPARENT, UIO_USERSPACE, SCARG(uap, link), p); 1689 if ((error = namei(&nd)) != 0) 1690 goto out; 1691 if (nd.ni_vp) { 1692 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1693 if (nd.ni_dvp == nd.ni_vp) 1694 vrele(nd.ni_dvp); 1695 else 1696 vput(nd.ni_dvp); 1697 vrele(nd.ni_vp); 1698 error = EEXIST; 1699 goto out; 1700 } 1701 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1702 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1703 if (nd.ni_dvp == nd.ni_vp) 1704 vrele(nd.ni_dvp); 1705 else 1706 vput(nd.ni_dvp); 1707 if ((error = vn_start_write(NULL, &mp, 1708 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1709 return (error); 1710 goto restart; 1711 } 1712 VATTR_NULL(&vattr); 1713 vattr.va_mode = ACCESSPERMS &~ p->p_cwdi->cwdi_cmask; 1714 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1715 error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, path); 1716 if (error == 0) 1717 vput(nd.ni_vp); 1718 vn_finished_write(mp, 0); 1719 out: 1720 PNBUF_PUT(path); 1721 return (error); 1722 } 1723 1724 /* 1725 * Delete a whiteout from the filesystem. 1726 */ 1727 /* ARGSUSED */ 1728 int 1729 sys_undelete(l, v, retval) 1730 struct lwp *l; 1731 void *v; 1732 register_t *retval; 1733 { 1734 struct sys_undelete_args /* { 1735 syscallarg(const char *) path; 1736 } */ *uap = v; 1737 struct proc *p = l->l_proc; 1738 int error; 1739 struct mount *mp; 1740 struct nameidata nd; 1741 1742 restart: 1743 NDINIT(&nd, DELETE, LOCKPARENT|DOWHITEOUT, UIO_USERSPACE, 1744 SCARG(uap, path), p); 1745 error = namei(&nd); 1746 if (error) 1747 return (error); 1748 1749 if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) { 1750 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1751 if (nd.ni_dvp == nd.ni_vp) 1752 vrele(nd.ni_dvp); 1753 else 1754 vput(nd.ni_dvp); 1755 if (nd.ni_vp) 1756 vrele(nd.ni_vp); 1757 return (EEXIST); 1758 } 1759 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1760 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1761 if (nd.ni_dvp == nd.ni_vp) 1762 vrele(nd.ni_dvp); 1763 else 1764 vput(nd.ni_dvp); 1765 if ((error = vn_start_write(NULL, &mp, 1766 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1767 return (error); 1768 goto restart; 1769 } 1770 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1771 if ((error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE)) != 0) 1772 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1773 vput(nd.ni_dvp); 1774 vn_finished_write(mp, 0); 1775 return (error); 1776 } 1777 1778 /* 1779 * Delete a name from the filesystem. 1780 */ 1781 /* ARGSUSED */ 1782 int 1783 sys_unlink(l, v, retval) 1784 struct lwp *l; 1785 void *v; 1786 register_t *retval; 1787 { 1788 struct sys_unlink_args /* { 1789 syscallarg(const char *) path; 1790 } */ *uap = v; 1791 struct proc *p = l->l_proc; 1792 struct mount *mp; 1793 struct vnode *vp; 1794 int error; 1795 struct nameidata nd; 1796 1797 restart: 1798 NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE, 1799 SCARG(uap, path), p); 1800 if ((error = namei(&nd)) != 0) 1801 return (error); 1802 vp = nd.ni_vp; 1803 1804 /* 1805 * The root of a mounted filesystem cannot be deleted. 1806 */ 1807 if (vp->v_flag & VROOT) { 1808 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1809 if (nd.ni_dvp == vp) 1810 vrele(nd.ni_dvp); 1811 else 1812 vput(nd.ni_dvp); 1813 vput(vp); 1814 error = EBUSY; 1815 goto out; 1816 } 1817 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 1818 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 1819 if (nd.ni_dvp == vp) 1820 vrele(nd.ni_dvp); 1821 else 1822 vput(nd.ni_dvp); 1823 vput(vp); 1824 if ((error = vn_start_write(NULL, &mp, 1825 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 1826 return (error); 1827 goto restart; 1828 } 1829 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 1830 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 1831 error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 1832 vn_finished_write(mp, 0); 1833 out: 1834 return (error); 1835 } 1836 1837 /* 1838 * Reposition read/write file offset. 1839 */ 1840 int 1841 sys_lseek(l, v, retval) 1842 struct lwp *l; 1843 void *v; 1844 register_t *retval; 1845 { 1846 struct sys_lseek_args /* { 1847 syscallarg(int) fd; 1848 syscallarg(int) pad; 1849 syscallarg(off_t) offset; 1850 syscallarg(int) whence; 1851 } */ *uap = v; 1852 struct proc *p = l->l_proc; 1853 struct ucred *cred = p->p_ucred; 1854 struct filedesc *fdp = p->p_fd; 1855 struct file *fp; 1856 struct vnode *vp; 1857 struct vattr vattr; 1858 off_t newoff; 1859 int error; 1860 1861 if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL) 1862 return (EBADF); 1863 1864 FILE_USE(fp); 1865 1866 vp = (struct vnode *)fp->f_data; 1867 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 1868 error = ESPIPE; 1869 goto out; 1870 } 1871 1872 switch (SCARG(uap, whence)) { 1873 case SEEK_CUR: 1874 newoff = fp->f_offset + SCARG(uap, offset); 1875 break; 1876 case SEEK_END: 1877 error = VOP_GETATTR(vp, &vattr, cred, p); 1878 if (error) 1879 goto out; 1880 newoff = SCARG(uap, offset) + vattr.va_size; 1881 break; 1882 case SEEK_SET: 1883 newoff = SCARG(uap, offset); 1884 break; 1885 default: 1886 error = EINVAL; 1887 goto out; 1888 } 1889 if ((error = VOP_SEEK(vp, fp->f_offset, newoff, cred)) != 0) 1890 goto out; 1891 1892 *(off_t *)retval = fp->f_offset = newoff; 1893 out: 1894 FILE_UNUSE(fp, p); 1895 return (error); 1896 } 1897 1898 /* 1899 * Positional read system call. 1900 */ 1901 int 1902 sys_pread(l, v, retval) 1903 struct lwp *l; 1904 void *v; 1905 register_t *retval; 1906 { 1907 struct sys_pread_args /* { 1908 syscallarg(int) fd; 1909 syscallarg(void *) buf; 1910 syscallarg(size_t) nbyte; 1911 syscallarg(off_t) offset; 1912 } */ *uap = v; 1913 struct proc *p = l->l_proc; 1914 struct filedesc *fdp = p->p_fd; 1915 struct file *fp; 1916 struct vnode *vp; 1917 off_t offset; 1918 int error, fd = SCARG(uap, fd); 1919 1920 if ((fp = fd_getfile(fdp, fd)) == NULL) 1921 return (EBADF); 1922 1923 if ((fp->f_flag & FREAD) == 0) { 1924 simple_unlock(&fp->f_slock); 1925 return (EBADF); 1926 } 1927 1928 FILE_USE(fp); 1929 1930 vp = (struct vnode *)fp->f_data; 1931 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 1932 error = ESPIPE; 1933 goto out; 1934 } 1935 1936 offset = SCARG(uap, offset); 1937 1938 /* 1939 * XXX This works because no file systems actually 1940 * XXX take any action on the seek operation. 1941 */ 1942 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 1943 goto out; 1944 1945 /* dofileread() will unuse the descriptor for us */ 1946 return (dofileread(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte), 1947 &offset, 0, retval)); 1948 1949 out: 1950 FILE_UNUSE(fp, p); 1951 return (error); 1952 } 1953 1954 /* 1955 * Positional scatter read system call. 1956 */ 1957 int 1958 sys_preadv(l, v, retval) 1959 struct lwp *l; 1960 void *v; 1961 register_t *retval; 1962 { 1963 struct sys_preadv_args /* { 1964 syscallarg(int) fd; 1965 syscallarg(const struct iovec *) iovp; 1966 syscallarg(int) iovcnt; 1967 syscallarg(off_t) offset; 1968 } */ *uap = v; 1969 struct proc *p = l->l_proc; 1970 struct filedesc *fdp = p->p_fd; 1971 struct file *fp; 1972 struct vnode *vp; 1973 off_t offset; 1974 int error, fd = SCARG(uap, fd); 1975 1976 if ((fp = fd_getfile(fdp, fd)) == NULL) 1977 return (EBADF); 1978 1979 if ((fp->f_flag & FREAD) == 0) { 1980 simple_unlock(&fp->f_slock); 1981 return (EBADF); 1982 } 1983 1984 FILE_USE(fp); 1985 1986 vp = (struct vnode *)fp->f_data; 1987 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 1988 error = ESPIPE; 1989 goto out; 1990 } 1991 1992 offset = SCARG(uap, offset); 1993 1994 /* 1995 * XXX This works because no file systems actually 1996 * XXX take any action on the seek operation. 1997 */ 1998 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 1999 goto out; 2000 2001 /* dofilereadv() will unuse the descriptor for us */ 2002 return (dofilereadv(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt), 2003 &offset, 0, retval)); 2004 2005 out: 2006 FILE_UNUSE(fp, p); 2007 return (error); 2008 } 2009 2010 /* 2011 * Positional write system call. 2012 */ 2013 int 2014 sys_pwrite(l, v, retval) 2015 struct lwp *l; 2016 void *v; 2017 register_t *retval; 2018 { 2019 struct sys_pwrite_args /* { 2020 syscallarg(int) fd; 2021 syscallarg(const void *) buf; 2022 syscallarg(size_t) nbyte; 2023 syscallarg(off_t) offset; 2024 } */ *uap = v; 2025 struct proc *p = l->l_proc; 2026 struct filedesc *fdp = p->p_fd; 2027 struct file *fp; 2028 struct vnode *vp; 2029 off_t offset; 2030 int error, fd = SCARG(uap, fd); 2031 2032 if ((fp = fd_getfile(fdp, fd)) == NULL) 2033 return (EBADF); 2034 2035 if ((fp->f_flag & FWRITE) == 0) { 2036 simple_unlock(&fp->f_slock); 2037 return (EBADF); 2038 } 2039 2040 FILE_USE(fp); 2041 2042 vp = (struct vnode *)fp->f_data; 2043 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 2044 error = ESPIPE; 2045 goto out; 2046 } 2047 2048 offset = SCARG(uap, offset); 2049 2050 /* 2051 * XXX This works because no file systems actually 2052 * XXX take any action on the seek operation. 2053 */ 2054 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 2055 goto out; 2056 2057 /* dofilewrite() will unuse the descriptor for us */ 2058 return (dofilewrite(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte), 2059 &offset, 0, retval)); 2060 2061 out: 2062 FILE_UNUSE(fp, p); 2063 return (error); 2064 } 2065 2066 /* 2067 * Positional gather write system call. 2068 */ 2069 int 2070 sys_pwritev(l, v, retval) 2071 struct lwp *l; 2072 void *v; 2073 register_t *retval; 2074 { 2075 struct sys_pwritev_args /* { 2076 syscallarg(int) fd; 2077 syscallarg(const struct iovec *) iovp; 2078 syscallarg(int) iovcnt; 2079 syscallarg(off_t) offset; 2080 } */ *uap = v; 2081 struct proc *p = l->l_proc; 2082 struct filedesc *fdp = p->p_fd; 2083 struct file *fp; 2084 struct vnode *vp; 2085 off_t offset; 2086 int error, fd = SCARG(uap, fd); 2087 2088 if ((fp = fd_getfile(fdp, fd)) == NULL) 2089 return (EBADF); 2090 2091 if ((fp->f_flag & FWRITE) == 0) { 2092 simple_unlock(&fp->f_slock); 2093 return (EBADF); 2094 } 2095 2096 FILE_USE(fp); 2097 2098 vp = (struct vnode *)fp->f_data; 2099 if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { 2100 error = ESPIPE; 2101 goto out; 2102 } 2103 2104 offset = SCARG(uap, offset); 2105 2106 /* 2107 * XXX This works because no file systems actually 2108 * XXX take any action on the seek operation. 2109 */ 2110 if ((error = VOP_SEEK(vp, fp->f_offset, offset, fp->f_cred)) != 0) 2111 goto out; 2112 2113 /* dofilewritev() will unuse the descriptor for us */ 2114 return (dofilewritev(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt), 2115 &offset, 0, retval)); 2116 2117 out: 2118 FILE_UNUSE(fp, p); 2119 return (error); 2120 } 2121 2122 /* 2123 * Check access permissions. 2124 */ 2125 int 2126 sys_access(l, v, retval) 2127 struct lwp *l; 2128 void *v; 2129 register_t *retval; 2130 { 2131 struct sys_access_args /* { 2132 syscallarg(const char *) path; 2133 syscallarg(int) flags; 2134 } */ *uap = v; 2135 struct proc *p = l->l_proc; 2136 struct ucred *cred; 2137 struct vnode *vp; 2138 int error, flags; 2139 struct nameidata nd; 2140 2141 cred = crdup(p->p_ucred); 2142 cred->cr_uid = p->p_cred->p_ruid; 2143 cred->cr_gid = p->p_cred->p_rgid; 2144 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2145 SCARG(uap, path), p); 2146 /* Override default credentials */ 2147 nd.ni_cnd.cn_cred = cred; 2148 if ((error = namei(&nd)) != 0) 2149 goto out; 2150 vp = nd.ni_vp; 2151 2152 /* Flags == 0 means only check for existence. */ 2153 if (SCARG(uap, flags)) { 2154 flags = 0; 2155 if (SCARG(uap, flags) & R_OK) 2156 flags |= VREAD; 2157 if (SCARG(uap, flags) & W_OK) 2158 flags |= VWRITE; 2159 if (SCARG(uap, flags) & X_OK) 2160 flags |= VEXEC; 2161 2162 error = VOP_ACCESS(vp, flags, cred, p); 2163 if (!error && (flags & VWRITE)) 2164 error = vn_writechk(vp); 2165 } 2166 vput(vp); 2167 out: 2168 crfree(cred); 2169 return (error); 2170 } 2171 2172 /* 2173 * Get file status; this version follows links. 2174 */ 2175 /* ARGSUSED */ 2176 int 2177 sys___stat13(l, v, retval) 2178 struct lwp *l; 2179 void *v; 2180 register_t *retval; 2181 { 2182 struct sys___stat13_args /* { 2183 syscallarg(const char *) path; 2184 syscallarg(struct stat *) ub; 2185 } */ *uap = v; 2186 struct proc *p = l->l_proc; 2187 struct stat sb; 2188 int error; 2189 struct nameidata nd; 2190 2191 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2192 SCARG(uap, path), p); 2193 if ((error = namei(&nd)) != 0) 2194 return (error); 2195 error = vn_stat(nd.ni_vp, &sb, p); 2196 vput(nd.ni_vp); 2197 if (error) 2198 return (error); 2199 error = copyout(&sb, SCARG(uap, ub), sizeof(sb)); 2200 return (error); 2201 } 2202 2203 /* 2204 * Get file status; this version does not follow links. 2205 */ 2206 /* ARGSUSED */ 2207 int 2208 sys___lstat13(l, v, retval) 2209 struct lwp *l; 2210 void *v; 2211 register_t *retval; 2212 { 2213 struct sys___lstat13_args /* { 2214 syscallarg(const char *) path; 2215 syscallarg(struct stat *) ub; 2216 } */ *uap = v; 2217 struct proc *p = l->l_proc; 2218 struct stat sb; 2219 int error; 2220 struct nameidata nd; 2221 2222 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, 2223 SCARG(uap, path), p); 2224 if ((error = namei(&nd)) != 0) 2225 return (error); 2226 error = vn_stat(nd.ni_vp, &sb, p); 2227 vput(nd.ni_vp); 2228 if (error) 2229 return (error); 2230 error = copyout(&sb, SCARG(uap, ub), sizeof(sb)); 2231 return (error); 2232 } 2233 2234 /* 2235 * Get configurable pathname variables. 2236 */ 2237 /* ARGSUSED */ 2238 int 2239 sys_pathconf(l, v, retval) 2240 struct lwp *l; 2241 void *v; 2242 register_t *retval; 2243 { 2244 struct sys_pathconf_args /* { 2245 syscallarg(const char *) path; 2246 syscallarg(int) name; 2247 } */ *uap = v; 2248 struct proc *p = l->l_proc; 2249 int error; 2250 struct nameidata nd; 2251 2252 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 2253 SCARG(uap, path), p); 2254 if ((error = namei(&nd)) != 0) 2255 return (error); 2256 error = VOP_PATHCONF(nd.ni_vp, SCARG(uap, name), retval); 2257 vput(nd.ni_vp); 2258 return (error); 2259 } 2260 2261 /* 2262 * Return target name of a symbolic link. 2263 */ 2264 /* ARGSUSED */ 2265 int 2266 sys_readlink(l, v, retval) 2267 struct lwp *l; 2268 void *v; 2269 register_t *retval; 2270 { 2271 struct sys_readlink_args /* { 2272 syscallarg(const char *) path; 2273 syscallarg(char *) buf; 2274 syscallarg(size_t) count; 2275 } */ *uap = v; 2276 struct proc *p = l->l_proc; 2277 struct vnode *vp; 2278 struct iovec aiov; 2279 struct uio auio; 2280 int error; 2281 struct nameidata nd; 2282 2283 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, 2284 SCARG(uap, path), p); 2285 if ((error = namei(&nd)) != 0) 2286 return (error); 2287 vp = nd.ni_vp; 2288 if (vp->v_type != VLNK) 2289 error = EINVAL; 2290 else if (!(vp->v_mount->mnt_flag & MNT_SYMPERM) || 2291 (error = VOP_ACCESS(vp, VREAD, p->p_ucred, p)) == 0) { 2292 aiov.iov_base = SCARG(uap, buf); 2293 aiov.iov_len = SCARG(uap, count); 2294 auio.uio_iov = &aiov; 2295 auio.uio_iovcnt = 1; 2296 auio.uio_offset = 0; 2297 auio.uio_rw = UIO_READ; 2298 auio.uio_segflg = UIO_USERSPACE; 2299 auio.uio_procp = p; 2300 auio.uio_resid = SCARG(uap, count); 2301 error = VOP_READLINK(vp, &auio, p->p_ucred); 2302 } 2303 vput(vp); 2304 *retval = SCARG(uap, count) - auio.uio_resid; 2305 return (error); 2306 } 2307 2308 /* 2309 * Change flags of a file given a path name. 2310 */ 2311 /* ARGSUSED */ 2312 int 2313 sys_chflags(l, v, retval) 2314 struct lwp *l; 2315 void *v; 2316 register_t *retval; 2317 { 2318 struct sys_chflags_args /* { 2319 syscallarg(const char *) path; 2320 syscallarg(u_long) flags; 2321 } */ *uap = v; 2322 struct proc *p = l->l_proc; 2323 struct vnode *vp; 2324 int error; 2325 struct nameidata nd; 2326 2327 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2328 if ((error = namei(&nd)) != 0) 2329 return (error); 2330 vp = nd.ni_vp; 2331 error = change_flags(vp, SCARG(uap, flags), p); 2332 vput(vp); 2333 return (error); 2334 } 2335 2336 /* 2337 * Change flags of a file given a file descriptor. 2338 */ 2339 /* ARGSUSED */ 2340 int 2341 sys_fchflags(l, v, retval) 2342 struct lwp *l; 2343 void *v; 2344 register_t *retval; 2345 { 2346 struct sys_fchflags_args /* { 2347 syscallarg(int) fd; 2348 syscallarg(u_long) flags; 2349 } */ *uap = v; 2350 struct proc *p = l->l_proc; 2351 struct vnode *vp; 2352 struct file *fp; 2353 int error; 2354 2355 /* getvnode() will use the descriptor for us */ 2356 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2357 return (error); 2358 vp = (struct vnode *)fp->f_data; 2359 error = change_flags(vp, SCARG(uap, flags), p); 2360 VOP_UNLOCK(vp, 0); 2361 FILE_UNUSE(fp, p); 2362 return (error); 2363 } 2364 2365 /* 2366 * Change flags of a file given a path name; this version does 2367 * not follow links. 2368 */ 2369 int 2370 sys_lchflags(l, v, retval) 2371 struct lwp *l; 2372 void *v; 2373 register_t *retval; 2374 { 2375 struct sys_lchflags_args /* { 2376 syscallarg(const char *) path; 2377 syscallarg(u_long) flags; 2378 } */ *uap = v; 2379 struct proc *p = l->l_proc; 2380 struct vnode *vp; 2381 int error; 2382 struct nameidata nd; 2383 2384 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2385 if ((error = namei(&nd)) != 0) 2386 return (error); 2387 vp = nd.ni_vp; 2388 error = change_flags(vp, SCARG(uap, flags), p); 2389 vput(vp); 2390 return (error); 2391 } 2392 2393 /* 2394 * Common routine to change flags of a file. 2395 */ 2396 int 2397 change_flags(vp, flags, p) 2398 struct vnode *vp; 2399 u_long flags; 2400 struct proc *p; 2401 { 2402 struct mount *mp; 2403 struct vattr vattr; 2404 int error; 2405 2406 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2407 return (error); 2408 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2409 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2410 /* 2411 * Non-superusers cannot change the flags on devices, even if they 2412 * own them. 2413 */ 2414 if (suser(p->p_ucred, &p->p_acflag) != 0) { 2415 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0) 2416 goto out; 2417 if (vattr.va_type == VCHR || vattr.va_type == VBLK) { 2418 error = EINVAL; 2419 goto out; 2420 } 2421 } 2422 VATTR_NULL(&vattr); 2423 vattr.va_flags = flags; 2424 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2425 out: 2426 vn_finished_write(mp, 0); 2427 return (error); 2428 } 2429 2430 /* 2431 * Change mode of a file given path name; this version follows links. 2432 */ 2433 /* ARGSUSED */ 2434 int 2435 sys_chmod(l, v, retval) 2436 struct lwp *l; 2437 void *v; 2438 register_t *retval; 2439 { 2440 struct sys_chmod_args /* { 2441 syscallarg(const char *) path; 2442 syscallarg(int) mode; 2443 } */ *uap = v; 2444 struct proc *p = l->l_proc; 2445 int error; 2446 struct nameidata nd; 2447 2448 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2449 if ((error = namei(&nd)) != 0) 2450 return (error); 2451 2452 error = change_mode(nd.ni_vp, SCARG(uap, mode), p); 2453 2454 vrele(nd.ni_vp); 2455 return (error); 2456 } 2457 2458 /* 2459 * Change mode of a file given a file descriptor. 2460 */ 2461 /* ARGSUSED */ 2462 int 2463 sys_fchmod(l, v, retval) 2464 struct lwp *l; 2465 void *v; 2466 register_t *retval; 2467 { 2468 struct sys_fchmod_args /* { 2469 syscallarg(int) fd; 2470 syscallarg(int) mode; 2471 } */ *uap = v; 2472 struct proc *p = l->l_proc; 2473 struct file *fp; 2474 int error; 2475 2476 /* getvnode() will use the descriptor for us */ 2477 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2478 return (error); 2479 2480 error = change_mode((struct vnode *)fp->f_data, SCARG(uap, mode), p); 2481 FILE_UNUSE(fp, p); 2482 return (error); 2483 } 2484 2485 /* 2486 * Change mode of a file given path name; this version does not follow links. 2487 */ 2488 /* ARGSUSED */ 2489 int 2490 sys_lchmod(l, v, retval) 2491 struct lwp *l; 2492 void *v; 2493 register_t *retval; 2494 { 2495 struct sys_lchmod_args /* { 2496 syscallarg(const char *) path; 2497 syscallarg(int) mode; 2498 } */ *uap = v; 2499 struct proc *p = l->l_proc; 2500 int error; 2501 struct nameidata nd; 2502 2503 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2504 if ((error = namei(&nd)) != 0) 2505 return (error); 2506 2507 error = change_mode(nd.ni_vp, SCARG(uap, mode), p); 2508 2509 vrele(nd.ni_vp); 2510 return (error); 2511 } 2512 2513 /* 2514 * Common routine to set mode given a vnode. 2515 */ 2516 static int 2517 change_mode(vp, mode, p) 2518 struct vnode *vp; 2519 int mode; 2520 struct proc *p; 2521 { 2522 struct mount *mp; 2523 struct vattr vattr; 2524 int error; 2525 2526 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2527 return (error); 2528 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2529 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2530 VATTR_NULL(&vattr); 2531 vattr.va_mode = mode & ALLPERMS; 2532 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2533 VOP_UNLOCK(vp, 0); 2534 vn_finished_write(mp, 0); 2535 return (error); 2536 } 2537 2538 /* 2539 * Set ownership given a path name; this version follows links. 2540 */ 2541 /* ARGSUSED */ 2542 int 2543 sys_chown(l, v, retval) 2544 struct lwp *l; 2545 void *v; 2546 register_t *retval; 2547 { 2548 struct sys_chown_args /* { 2549 syscallarg(const char *) path; 2550 syscallarg(uid_t) uid; 2551 syscallarg(gid_t) gid; 2552 } */ *uap = v; 2553 struct proc *p = l->l_proc; 2554 int error; 2555 struct nameidata nd; 2556 2557 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2558 if ((error = namei(&nd)) != 0) 2559 return (error); 2560 2561 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 0); 2562 2563 vrele(nd.ni_vp); 2564 return (error); 2565 } 2566 2567 /* 2568 * Set ownership given a path name; this version follows links. 2569 * Provides POSIX semantics. 2570 */ 2571 /* ARGSUSED */ 2572 int 2573 sys___posix_chown(l, v, retval) 2574 struct lwp *l; 2575 void *v; 2576 register_t *retval; 2577 { 2578 struct sys_chown_args /* { 2579 syscallarg(const char *) path; 2580 syscallarg(uid_t) uid; 2581 syscallarg(gid_t) gid; 2582 } */ *uap = v; 2583 struct proc *p = l->l_proc; 2584 int error; 2585 struct nameidata nd; 2586 2587 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2588 if ((error = namei(&nd)) != 0) 2589 return (error); 2590 2591 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 1); 2592 2593 vrele(nd.ni_vp); 2594 return (error); 2595 } 2596 2597 /* 2598 * Set ownership given a file descriptor. 2599 */ 2600 /* ARGSUSED */ 2601 int 2602 sys_fchown(l, v, retval) 2603 struct lwp *l; 2604 void *v; 2605 register_t *retval; 2606 { 2607 struct sys_fchown_args /* { 2608 syscallarg(int) fd; 2609 syscallarg(uid_t) uid; 2610 syscallarg(gid_t) gid; 2611 } */ *uap = v; 2612 struct proc *p = l->l_proc; 2613 int error; 2614 struct file *fp; 2615 2616 /* getvnode() will use the descriptor for us */ 2617 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2618 return (error); 2619 2620 error = change_owner((struct vnode *)fp->f_data, SCARG(uap, uid), 2621 SCARG(uap, gid), p, 0); 2622 FILE_UNUSE(fp, p); 2623 return (error); 2624 } 2625 2626 /* 2627 * Set ownership given a file descriptor, providing POSIX/XPG semantics. 2628 */ 2629 /* ARGSUSED */ 2630 int 2631 sys___posix_fchown(l, v, retval) 2632 struct lwp *l; 2633 void *v; 2634 register_t *retval; 2635 { 2636 struct sys_fchown_args /* { 2637 syscallarg(int) fd; 2638 syscallarg(uid_t) uid; 2639 syscallarg(gid_t) gid; 2640 } */ *uap = v; 2641 struct proc *p = l->l_proc; 2642 int error; 2643 struct file *fp; 2644 2645 /* getvnode() will use the descriptor for us */ 2646 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2647 return (error); 2648 2649 error = change_owner((struct vnode *)fp->f_data, SCARG(uap, uid), 2650 SCARG(uap, gid), p, 1); 2651 FILE_UNUSE(fp, p); 2652 return (error); 2653 } 2654 2655 /* 2656 * Set ownership given a path name; this version does not follow links. 2657 */ 2658 /* ARGSUSED */ 2659 int 2660 sys_lchown(l, v, retval) 2661 struct lwp *l; 2662 void *v; 2663 register_t *retval; 2664 { 2665 struct sys_lchown_args /* { 2666 syscallarg(const char *) path; 2667 syscallarg(uid_t) uid; 2668 syscallarg(gid_t) gid; 2669 } */ *uap = v; 2670 struct proc *p = l->l_proc; 2671 int error; 2672 struct nameidata nd; 2673 2674 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2675 if ((error = namei(&nd)) != 0) 2676 return (error); 2677 2678 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 0); 2679 2680 vrele(nd.ni_vp); 2681 return (error); 2682 } 2683 2684 /* 2685 * Set ownership given a path name; this version does not follow links. 2686 * Provides POSIX/XPG semantics. 2687 */ 2688 /* ARGSUSED */ 2689 int 2690 sys___posix_lchown(l, v, retval) 2691 struct lwp *l; 2692 void *v; 2693 register_t *retval; 2694 { 2695 struct sys_lchown_args /* { 2696 syscallarg(const char *) path; 2697 syscallarg(uid_t) uid; 2698 syscallarg(gid_t) gid; 2699 } */ *uap = v; 2700 struct proc *p = l->l_proc; 2701 int error; 2702 struct nameidata nd; 2703 2704 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2705 if ((error = namei(&nd)) != 0) 2706 return (error); 2707 2708 error = change_owner(nd.ni_vp, SCARG(uap, uid), SCARG(uap, gid), p, 1); 2709 2710 vrele(nd.ni_vp); 2711 return (error); 2712 } 2713 2714 /* 2715 * Common routine to set ownership given a vnode. 2716 */ 2717 static int 2718 change_owner(vp, uid, gid, p, posix_semantics) 2719 struct vnode *vp; 2720 uid_t uid; 2721 gid_t gid; 2722 struct proc *p; 2723 int posix_semantics; 2724 { 2725 struct mount *mp; 2726 struct vattr vattr; 2727 mode_t newmode; 2728 int error; 2729 2730 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2731 return (error); 2732 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2733 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2734 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0) 2735 goto out; 2736 2737 #define CHANGED(x) ((int)(x) != -1) 2738 newmode = vattr.va_mode; 2739 if (posix_semantics) { 2740 /* 2741 * POSIX/XPG semantics: if the caller is not the super-user, 2742 * clear set-user-id and set-group-id bits. Both POSIX and 2743 * the XPG consider the behaviour for calls by the super-user 2744 * implementation-defined; we leave the set-user-id and set- 2745 * group-id settings intact in that case. 2746 */ 2747 if (suser(p->p_ucred, NULL) != 0) 2748 newmode &= ~(S_ISUID | S_ISGID); 2749 } else { 2750 /* 2751 * NetBSD semantics: when changing owner and/or group, 2752 * clear the respective bit(s). 2753 */ 2754 if (CHANGED(uid)) 2755 newmode &= ~S_ISUID; 2756 if (CHANGED(gid)) 2757 newmode &= ~S_ISGID; 2758 } 2759 /* Update va_mode iff altered. */ 2760 if (vattr.va_mode == newmode) 2761 newmode = VNOVAL; 2762 2763 VATTR_NULL(&vattr); 2764 vattr.va_uid = CHANGED(uid) ? uid : (uid_t)VNOVAL; 2765 vattr.va_gid = CHANGED(gid) ? gid : (gid_t)VNOVAL; 2766 vattr.va_mode = newmode; 2767 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2768 #undef CHANGED 2769 2770 out: 2771 VOP_UNLOCK(vp, 0); 2772 vn_finished_write(mp, 0); 2773 return (error); 2774 } 2775 2776 /* 2777 * Set the access and modification times given a path name; this 2778 * version follows links. 2779 */ 2780 /* ARGSUSED */ 2781 int 2782 sys_utimes(l, v, retval) 2783 struct lwp *l; 2784 void *v; 2785 register_t *retval; 2786 { 2787 struct sys_utimes_args /* { 2788 syscallarg(const char *) path; 2789 syscallarg(const struct timeval *) tptr; 2790 } */ *uap = v; 2791 struct proc *p = l->l_proc; 2792 int error; 2793 struct nameidata nd; 2794 2795 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2796 if ((error = namei(&nd)) != 0) 2797 return (error); 2798 2799 error = change_utimes(nd.ni_vp, SCARG(uap, tptr), p); 2800 2801 vrele(nd.ni_vp); 2802 return (error); 2803 } 2804 2805 /* 2806 * Set the access and modification times given a file descriptor. 2807 */ 2808 /* ARGSUSED */ 2809 int 2810 sys_futimes(l, v, retval) 2811 struct lwp *l; 2812 void *v; 2813 register_t *retval; 2814 { 2815 struct sys_futimes_args /* { 2816 syscallarg(int) fd; 2817 syscallarg(const struct timeval *) tptr; 2818 } */ *uap = v; 2819 struct proc *p = l->l_proc; 2820 int error; 2821 struct file *fp; 2822 2823 /* getvnode() will use the descriptor for us */ 2824 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2825 return (error); 2826 2827 error = change_utimes((struct vnode *)fp->f_data, SCARG(uap, tptr), p); 2828 FILE_UNUSE(fp, p); 2829 return (error); 2830 } 2831 2832 /* 2833 * Set the access and modification times given a path name; this 2834 * version does not follow links. 2835 */ 2836 /* ARGSUSED */ 2837 int 2838 sys_lutimes(l, v, retval) 2839 struct lwp *l; 2840 void *v; 2841 register_t *retval; 2842 { 2843 struct sys_lutimes_args /* { 2844 syscallarg(const char *) path; 2845 syscallarg(const struct timeval *) tptr; 2846 } */ *uap = v; 2847 struct proc *p = l->l_proc; 2848 int error; 2849 struct nameidata nd; 2850 2851 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2852 if ((error = namei(&nd)) != 0) 2853 return (error); 2854 2855 error = change_utimes(nd.ni_vp, SCARG(uap, tptr), p); 2856 2857 vrele(nd.ni_vp); 2858 return (error); 2859 } 2860 2861 /* 2862 * Common routine to set access and modification times given a vnode. 2863 */ 2864 static int 2865 change_utimes(vp, tptr, p) 2866 struct vnode *vp; 2867 const struct timeval *tptr; 2868 struct proc *p; 2869 { 2870 struct timeval tv[2]; 2871 struct mount *mp; 2872 struct vattr vattr; 2873 int error; 2874 2875 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 2876 return (error); 2877 VATTR_NULL(&vattr); 2878 if (tptr == NULL) { 2879 microtime(&tv[0]); 2880 tv[1] = tv[0]; 2881 vattr.va_vaflags |= VA_UTIMES_NULL; 2882 } else { 2883 error = copyin(tptr, tv, sizeof(tv)); 2884 if (error) 2885 goto out; 2886 } 2887 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2888 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2889 vattr.va_atime.tv_sec = tv[0].tv_sec; 2890 vattr.va_atime.tv_nsec = tv[0].tv_usec * 1000; 2891 vattr.va_mtime.tv_sec = tv[1].tv_sec; 2892 vattr.va_mtime.tv_nsec = tv[1].tv_usec * 1000; 2893 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2894 VOP_UNLOCK(vp, 0); 2895 out: 2896 vn_finished_write(mp, 0); 2897 return (error); 2898 } 2899 2900 /* 2901 * Truncate a file given its path name. 2902 */ 2903 /* ARGSUSED */ 2904 int 2905 sys_truncate(l, v, retval) 2906 struct lwp *l; 2907 void *v; 2908 register_t *retval; 2909 { 2910 struct sys_truncate_args /* { 2911 syscallarg(const char *) path; 2912 syscallarg(int) pad; 2913 syscallarg(off_t) length; 2914 } */ *uap = v; 2915 struct proc *p = l->l_proc; 2916 struct vnode *vp; 2917 struct mount *mp; 2918 struct vattr vattr; 2919 int error; 2920 struct nameidata nd; 2921 2922 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 2923 if ((error = namei(&nd)) != 0) 2924 return (error); 2925 vp = nd.ni_vp; 2926 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 2927 vrele(vp); 2928 return (error); 2929 } 2930 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2931 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2932 if (vp->v_type == VDIR) 2933 error = EISDIR; 2934 else if ((error = vn_writechk(vp)) == 0 && 2935 (error = VOP_ACCESS(vp, VWRITE, p->p_ucred, p)) == 0) { 2936 VATTR_NULL(&vattr); 2937 vattr.va_size = SCARG(uap, length); 2938 error = VOP_SETATTR(vp, &vattr, p->p_ucred, p); 2939 } 2940 vput(vp); 2941 vn_finished_write(mp, 0); 2942 return (error); 2943 } 2944 2945 /* 2946 * Truncate a file given a file descriptor. 2947 */ 2948 /* ARGSUSED */ 2949 int 2950 sys_ftruncate(l, v, retval) 2951 struct lwp *l; 2952 void *v; 2953 register_t *retval; 2954 { 2955 struct sys_ftruncate_args /* { 2956 syscallarg(int) fd; 2957 syscallarg(int) pad; 2958 syscallarg(off_t) length; 2959 } */ *uap = v; 2960 struct proc *p = l->l_proc; 2961 struct mount *mp; 2962 struct vattr vattr; 2963 struct vnode *vp; 2964 struct file *fp; 2965 int error; 2966 2967 /* getvnode() will use the descriptor for us */ 2968 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 2969 return (error); 2970 if ((fp->f_flag & FWRITE) == 0) { 2971 error = EINVAL; 2972 goto out; 2973 } 2974 vp = (struct vnode *)fp->f_data; 2975 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 2976 FILE_UNUSE(fp, p); 2977 return (error); 2978 } 2979 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 2980 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 2981 if (vp->v_type == VDIR) 2982 error = EISDIR; 2983 else if ((error = vn_writechk(vp)) == 0) { 2984 VATTR_NULL(&vattr); 2985 vattr.va_size = SCARG(uap, length); 2986 error = VOP_SETATTR(vp, &vattr, fp->f_cred, p); 2987 } 2988 VOP_UNLOCK(vp, 0); 2989 vn_finished_write(mp, 0); 2990 out: 2991 FILE_UNUSE(fp, p); 2992 return (error); 2993 } 2994 2995 /* 2996 * Sync an open file. 2997 */ 2998 /* ARGSUSED */ 2999 int 3000 sys_fsync(l, v, retval) 3001 struct lwp *l; 3002 void *v; 3003 register_t *retval; 3004 { 3005 struct sys_fsync_args /* { 3006 syscallarg(int) fd; 3007 } */ *uap = v; 3008 struct proc *p = l->l_proc; 3009 struct vnode *vp; 3010 struct mount *mp; 3011 struct file *fp; 3012 int error; 3013 3014 /* getvnode() will use the descriptor for us */ 3015 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3016 return (error); 3017 vp = (struct vnode *)fp->f_data; 3018 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) { 3019 FILE_UNUSE(fp, p); 3020 return (error); 3021 } 3022 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3023 error = VOP_FSYNC(vp, fp->f_cred, FSYNC_WAIT, 0, 0, p); 3024 if (error == 0 && bioops.io_fsync != NULL && 3025 vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP)) 3026 (*bioops.io_fsync)(vp); 3027 VOP_UNLOCK(vp, 0); 3028 vn_finished_write(mp, 0); 3029 FILE_UNUSE(fp, p); 3030 return (error); 3031 } 3032 3033 /* 3034 * Sync a range of file data. API modeled after that found in AIX. 3035 * 3036 * FDATASYNC indicates that we need only save enough metadata to be able 3037 * to re-read the written data. Note we duplicate AIX's requirement that 3038 * the file be open for writing. 3039 */ 3040 /* ARGSUSED */ 3041 int 3042 sys_fsync_range(l, v, retval) 3043 struct lwp *l; 3044 void *v; 3045 register_t *retval; 3046 { 3047 struct sys_fsync_range_args /* { 3048 syscallarg(int) fd; 3049 syscallarg(int) flags; 3050 syscallarg(off_t) start; 3051 syscallarg(int) length; 3052 } */ *uap = v; 3053 struct proc *p = l->l_proc; 3054 struct vnode *vp; 3055 struct file *fp; 3056 int flags, nflags; 3057 off_t s, e, len; 3058 int error; 3059 3060 /* getvnode() will use the descriptor for us */ 3061 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3062 return (error); 3063 3064 if ((fp->f_flag & FWRITE) == 0) { 3065 FILE_UNUSE(fp, p); 3066 return (EBADF); 3067 } 3068 3069 flags = SCARG(uap, flags); 3070 if (((flags & (FDATASYNC | FFILESYNC)) == 0) || 3071 ((~flags & (FDATASYNC | FFILESYNC)) == 0)) { 3072 return (EINVAL); 3073 } 3074 /* Now set up the flags for value(s) to pass to VOP_FSYNC() */ 3075 if (flags & FDATASYNC) 3076 nflags = FSYNC_DATAONLY | FSYNC_WAIT; 3077 else 3078 nflags = FSYNC_WAIT; 3079 3080 len = SCARG(uap, length); 3081 /* If length == 0, we do the whole file, and s = l = 0 will do that */ 3082 if (len) { 3083 s = SCARG(uap, start); 3084 e = s + len; 3085 if (e < s) { 3086 FILE_UNUSE(fp, p); 3087 return (EINVAL); 3088 } 3089 } else { 3090 e = 0; 3091 s = 0; 3092 } 3093 3094 vp = (struct vnode *)fp->f_data; 3095 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3096 error = VOP_FSYNC(vp, fp->f_cred, nflags, s, e, p); 3097 3098 if (error == 0 && bioops.io_fsync != NULL && 3099 vp->v_mount && (vp->v_mount->mnt_flag & MNT_SOFTDEP)) 3100 (*bioops.io_fsync)(vp); 3101 3102 VOP_UNLOCK(vp, 0); 3103 FILE_UNUSE(fp, p); 3104 return (error); 3105 } 3106 3107 /* 3108 * Sync the data of an open file. 3109 */ 3110 /* ARGSUSED */ 3111 int 3112 sys_fdatasync(l, v, retval) 3113 struct lwp *l; 3114 void *v; 3115 register_t *retval; 3116 { 3117 struct sys_fdatasync_args /* { 3118 syscallarg(int) fd; 3119 } */ *uap = v; 3120 struct proc *p = l->l_proc; 3121 struct vnode *vp; 3122 struct file *fp; 3123 int error; 3124 3125 /* getvnode() will use the descriptor for us */ 3126 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3127 return (error); 3128 if ((fp->f_flag & FWRITE) == 0) { 3129 FILE_UNUSE(fp, p); 3130 return (EBADF); 3131 } 3132 vp = (struct vnode *)fp->f_data; 3133 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3134 error = VOP_FSYNC(vp, fp->f_cred, FSYNC_WAIT|FSYNC_DATAONLY, 0, 0, p); 3135 VOP_UNLOCK(vp, 0); 3136 FILE_UNUSE(fp, p); 3137 return (error); 3138 } 3139 3140 /* 3141 * Rename files, (standard) BSD semantics frontend. 3142 */ 3143 /* ARGSUSED */ 3144 int 3145 sys_rename(l, v, retval) 3146 struct lwp *l; 3147 void *v; 3148 register_t *retval; 3149 { 3150 struct sys_rename_args /* { 3151 syscallarg(const char *) from; 3152 syscallarg(const char *) to; 3153 } */ *uap = v; 3154 struct proc *p = l->l_proc; 3155 3156 return (rename_files(SCARG(uap, from), SCARG(uap, to), p, 0)); 3157 } 3158 3159 /* 3160 * Rename files, POSIX semantics frontend. 3161 */ 3162 /* ARGSUSED */ 3163 int 3164 sys___posix_rename(l, v, retval) 3165 struct lwp *l; 3166 void *v; 3167 register_t *retval; 3168 { 3169 struct sys___posix_rename_args /* { 3170 syscallarg(const char *) from; 3171 syscallarg(const char *) to; 3172 } */ *uap = v; 3173 struct proc *p = l->l_proc; 3174 3175 return (rename_files(SCARG(uap, from), SCARG(uap, to), p, 1)); 3176 } 3177 3178 /* 3179 * Rename files. Source and destination must either both be directories, 3180 * or both not be directories. If target is a directory, it must be empty. 3181 * If `from' and `to' refer to the same object, the value of the `retain' 3182 * argument is used to determine whether `from' will be 3183 * 3184 * (retain == 0) deleted unless `from' and `to' refer to the same 3185 * object in the file system's name space (BSD). 3186 * (retain == 1) always retained (POSIX). 3187 */ 3188 static int 3189 rename_files(from, to, p, retain) 3190 const char *from, *to; 3191 struct proc *p; 3192 int retain; 3193 { 3194 struct mount *mp = NULL; 3195 struct vnode *tvp, *fvp, *tdvp; 3196 struct nameidata fromnd, tond; 3197 int error; 3198 3199 NDINIT(&fromnd, DELETE, WANTPARENT | SAVESTART, UIO_USERSPACE, 3200 from, p); 3201 if ((error = namei(&fromnd)) != 0) 3202 return (error); 3203 fvp = fromnd.ni_vp; 3204 error = vn_start_write(fvp, &mp, V_WAIT | V_PCATCH); 3205 if (error != 0) { 3206 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3207 vrele(fromnd.ni_dvp); 3208 vrele(fvp); 3209 if (fromnd.ni_startdir) 3210 vrele(fromnd.ni_startdir); 3211 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 3212 return (error); 3213 } 3214 NDINIT(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART | 3215 (fvp->v_type == VDIR ? CREATEDIR : 0), UIO_USERSPACE, to, p); 3216 if ((error = namei(&tond)) != 0) { 3217 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3218 vrele(fromnd.ni_dvp); 3219 vrele(fvp); 3220 goto out1; 3221 } 3222 tdvp = tond.ni_dvp; 3223 tvp = tond.ni_vp; 3224 3225 if (tvp != NULL) { 3226 if (fvp->v_type == VDIR && tvp->v_type != VDIR) { 3227 error = ENOTDIR; 3228 goto out; 3229 } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { 3230 error = EISDIR; 3231 goto out; 3232 } 3233 } 3234 3235 if (fvp == tdvp) 3236 error = EINVAL; 3237 3238 /* 3239 * Source and destination refer to the same object. 3240 */ 3241 if (fvp == tvp) { 3242 if (retain) 3243 error = -1; 3244 else if (fromnd.ni_dvp == tdvp && 3245 fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && 3246 !memcmp(fromnd.ni_cnd.cn_nameptr, 3247 tond.ni_cnd.cn_nameptr, 3248 fromnd.ni_cnd.cn_namelen)) 3249 error = -1; 3250 } 3251 3252 out: 3253 if (!error) { 3254 VOP_LEASE(tdvp, p, p->p_ucred, LEASE_WRITE); 3255 if (fromnd.ni_dvp != tdvp) 3256 VOP_LEASE(fromnd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 3257 if (tvp) { 3258 VOP_LEASE(tvp, p, p->p_ucred, LEASE_WRITE); 3259 } 3260 error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, 3261 tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); 3262 } else { 3263 VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); 3264 if (tdvp == tvp) 3265 vrele(tdvp); 3266 else 3267 vput(tdvp); 3268 if (tvp) 3269 vput(tvp); 3270 VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); 3271 vrele(fromnd.ni_dvp); 3272 vrele(fvp); 3273 } 3274 vrele(tond.ni_startdir); 3275 PNBUF_PUT(tond.ni_cnd.cn_pnbuf); 3276 out1: 3277 vn_finished_write(mp, 0); 3278 if (fromnd.ni_startdir) 3279 vrele(fromnd.ni_startdir); 3280 PNBUF_PUT(fromnd.ni_cnd.cn_pnbuf); 3281 return (error == -1 ? 0 : error); 3282 } 3283 3284 /* 3285 * Make a directory file. 3286 */ 3287 /* ARGSUSED */ 3288 int 3289 sys_mkdir(l, v, retval) 3290 struct lwp *l; 3291 void *v; 3292 register_t *retval; 3293 { 3294 struct sys_mkdir_args /* { 3295 syscallarg(const char *) path; 3296 syscallarg(int) mode; 3297 } */ *uap = v; 3298 struct proc *p = l->l_proc; 3299 struct mount *mp; 3300 struct vnode *vp; 3301 struct vattr vattr; 3302 int error; 3303 struct nameidata nd; 3304 3305 restart: 3306 NDINIT(&nd, CREATE, LOCKPARENT | CREATEDIR, UIO_USERSPACE, 3307 SCARG(uap, path), p); 3308 if ((error = namei(&nd)) != 0) 3309 return (error); 3310 vp = nd.ni_vp; 3311 if (vp != NULL) { 3312 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3313 if (nd.ni_dvp == vp) 3314 vrele(nd.ni_dvp); 3315 else 3316 vput(nd.ni_dvp); 3317 vrele(vp); 3318 return (EEXIST); 3319 } 3320 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 3321 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3322 if (nd.ni_dvp == vp) 3323 vrele(nd.ni_dvp); 3324 else 3325 vput(nd.ni_dvp); 3326 if ((error = vn_start_write(NULL, &mp, 3327 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 3328 return (error); 3329 goto restart; 3330 } 3331 VATTR_NULL(&vattr); 3332 vattr.va_type = VDIR; 3333 vattr.va_mode = 3334 (SCARG(uap, mode) & ACCESSPERMS) &~ p->p_cwdi->cwdi_cmask; 3335 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 3336 error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); 3337 if (!error) 3338 vput(nd.ni_vp); 3339 vn_finished_write(mp, 0); 3340 return (error); 3341 } 3342 3343 /* 3344 * Remove a directory file. 3345 */ 3346 /* ARGSUSED */ 3347 int 3348 sys_rmdir(l, v, retval) 3349 struct lwp *l; 3350 void *v; 3351 register_t *retval; 3352 { 3353 struct sys_rmdir_args /* { 3354 syscallarg(const char *) path; 3355 } */ *uap = v; 3356 struct proc *p = l->l_proc; 3357 struct mount *mp; 3358 struct vnode *vp; 3359 int error; 3360 struct nameidata nd; 3361 3362 restart: 3363 NDINIT(&nd, DELETE, LOCKPARENT | LOCKLEAF, UIO_USERSPACE, 3364 SCARG(uap, path), p); 3365 if ((error = namei(&nd)) != 0) 3366 return (error); 3367 vp = nd.ni_vp; 3368 if (vp->v_type != VDIR) { 3369 error = ENOTDIR; 3370 goto out; 3371 } 3372 /* 3373 * No rmdir "." please. 3374 */ 3375 if (nd.ni_dvp == vp) { 3376 error = EINVAL; 3377 goto out; 3378 } 3379 /* 3380 * The root of a mounted filesystem cannot be deleted. 3381 */ 3382 if (vp->v_flag & VROOT) { 3383 error = EBUSY; 3384 goto out; 3385 } 3386 if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { 3387 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3388 if (nd.ni_dvp == vp) 3389 vrele(nd.ni_dvp); 3390 else 3391 vput(nd.ni_dvp); 3392 vput(vp); 3393 if ((error = vn_start_write(NULL, &mp, 3394 V_WAIT | V_SLEEPONLY | V_PCATCH)) != 0) 3395 return (error); 3396 goto restart; 3397 } 3398 VOP_LEASE(nd.ni_dvp, p, p->p_ucred, LEASE_WRITE); 3399 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3400 error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); 3401 vn_finished_write(mp, 0); 3402 return (error); 3403 3404 out: 3405 VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); 3406 if (nd.ni_dvp == vp) 3407 vrele(nd.ni_dvp); 3408 else 3409 vput(nd.ni_dvp); 3410 vput(vp); 3411 return (error); 3412 } 3413 3414 /* 3415 * Read a block of directory entries in a file system independent format. 3416 */ 3417 int 3418 sys_getdents(l, v, retval) 3419 struct lwp *l; 3420 void *v; 3421 register_t *retval; 3422 { 3423 struct sys_getdents_args /* { 3424 syscallarg(int) fd; 3425 syscallarg(char *) buf; 3426 syscallarg(size_t) count; 3427 } */ *uap = v; 3428 struct proc *p = l->l_proc; 3429 struct file *fp; 3430 int error, done; 3431 3432 /* getvnode() will use the descriptor for us */ 3433 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 3434 return (error); 3435 if ((fp->f_flag & FREAD) == 0) { 3436 error = EBADF; 3437 goto out; 3438 } 3439 error = vn_readdir(fp, SCARG(uap, buf), UIO_USERSPACE, 3440 SCARG(uap, count), &done, p, 0, 0); 3441 #ifdef KTRACE 3442 if (!error && KTRPOINT(p, KTR_GENIO)) { 3443 struct iovec iov; 3444 iov.iov_base = SCARG(uap, buf); 3445 iov.iov_len = done; 3446 ktrgenio(p, SCARG(uap, fd), UIO_READ, &iov, done, 0); 3447 } 3448 #endif 3449 *retval = done; 3450 out: 3451 FILE_UNUSE(fp, p); 3452 return (error); 3453 } 3454 3455 /* 3456 * Set the mode mask for creation of filesystem nodes. 3457 */ 3458 int 3459 sys_umask(l, v, retval) 3460 struct lwp *l; 3461 void *v; 3462 register_t *retval; 3463 { 3464 struct sys_umask_args /* { 3465 syscallarg(mode_t) newmask; 3466 } */ *uap = v; 3467 struct proc *p = l->l_proc; 3468 struct cwdinfo *cwdi; 3469 3470 cwdi = p->p_cwdi; 3471 *retval = cwdi->cwdi_cmask; 3472 cwdi->cwdi_cmask = SCARG(uap, newmask) & ALLPERMS; 3473 return (0); 3474 } 3475 3476 /* 3477 * Void all references to file by ripping underlying filesystem 3478 * away from vnode. 3479 */ 3480 /* ARGSUSED */ 3481 int 3482 sys_revoke(l, v, retval) 3483 struct lwp *l; 3484 void *v; 3485 register_t *retval; 3486 { 3487 struct sys_revoke_args /* { 3488 syscallarg(const char *) path; 3489 } */ *uap = v; 3490 struct proc *p = l->l_proc; 3491 struct mount *mp; 3492 struct vnode *vp; 3493 struct vattr vattr; 3494 int error; 3495 struct nameidata nd; 3496 3497 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3498 if ((error = namei(&nd)) != 0) 3499 return (error); 3500 vp = nd.ni_vp; 3501 if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0) 3502 goto out; 3503 if (p->p_ucred->cr_uid != vattr.va_uid && 3504 (error = suser(p->p_ucred, &p->p_acflag)) != 0) 3505 goto out; 3506 if ((error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH)) != 0) 3507 goto out; 3508 if (vp->v_usecount > 1 || (vp->v_flag & (VALIASED | VLAYER))) 3509 VOP_REVOKE(vp, REVOKEALL); 3510 vn_finished_write(mp, 0); 3511 out: 3512 vrele(vp); 3513 return (error); 3514 } 3515 3516 /* 3517 * Convert a user file descriptor to a kernel file entry. 3518 */ 3519 int 3520 getvnode(fdp, fd, fpp) 3521 struct filedesc *fdp; 3522 int fd; 3523 struct file **fpp; 3524 { 3525 struct vnode *vp; 3526 struct file *fp; 3527 3528 if ((fp = fd_getfile(fdp, fd)) == NULL) 3529 return (EBADF); 3530 3531 FILE_USE(fp); 3532 3533 if (fp->f_type != DTYPE_VNODE) { 3534 FILE_UNUSE(fp, NULL); 3535 return (EINVAL); 3536 } 3537 3538 vp = (struct vnode *)fp->f_data; 3539 if (vp->v_type == VBAD) { 3540 FILE_UNUSE(fp, NULL); 3541 return (EBADF); 3542 } 3543 3544 *fpp = fp; 3545 return (0); 3546 } 3547 3548 /* 3549 * Push extended attribute configuration information into the VFS. 3550 * 3551 * NOTE: Not all file systems that support extended attributes will 3552 * require the use of this system call. 3553 */ 3554 int 3555 sys_extattrctl(struct lwp *l, void *v, register_t *retval) 3556 { 3557 struct sys_extattrctl_args /* { 3558 syscallarg(const char *) path; 3559 syscallarg(int) cmd; 3560 syscallarg(const char *) filename; 3561 syscallarg(int) attrnamespace; 3562 syscallarg(const char *) attrname; 3563 } */ *uap = v; 3564 struct proc *p = l->l_proc; 3565 struct vnode *vp; 3566 struct nameidata nd; 3567 struct mount *mp; 3568 char attrname[EXTATTR_MAXNAMELEN]; 3569 int error; 3570 3571 if (SCARG(uap, attrname) != NULL) { 3572 error = copyinstr(SCARG(uap, attrname), attrname, 3573 sizeof(attrname), NULL); 3574 if (error) 3575 return (error); 3576 } 3577 3578 vp = NULL; 3579 if (SCARG(uap, filename) != NULL) { 3580 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 3581 SCARG(uap, filename), p); 3582 error = namei(&nd); 3583 if (error) 3584 return (error); 3585 vp = nd.ni_vp; 3586 } 3587 3588 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3589 error = namei(&nd); 3590 if (error) { 3591 if (vp != NULL) 3592 vput(vp); 3593 return (error); 3594 } 3595 3596 error = vn_start_write(nd.ni_vp, &mp, V_WAIT | V_PCATCH); 3597 if (error) { 3598 if (vp != NULL) 3599 vput(vp); 3600 return (error); 3601 } 3602 3603 error = VFS_EXTATTRCTL(mp, SCARG(uap, cmd), vp, 3604 SCARG(uap, attrnamespace), 3605 SCARG(uap, attrname) != NULL ? attrname : NULL, p); 3606 3607 vn_finished_write(mp, 0); 3608 3609 if (vp != NULL) 3610 vrele(vp); 3611 3612 return (error); 3613 } 3614 3615 /* 3616 * Set a named extended attribute on a file or directory. 3617 */ 3618 static int 3619 extattr_set_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3620 const void *data, size_t nbytes, struct proc *p, register_t *retval) 3621 { 3622 struct mount *mp; 3623 struct uio auio; 3624 struct iovec aiov; 3625 ssize_t cnt; 3626 int error; 3627 3628 error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH); 3629 if (error) 3630 return (error); 3631 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3632 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3633 3634 aiov.iov_base = (caddr_t) data; /* XXX kills const */ 3635 aiov.iov_len = nbytes; 3636 auio.uio_iov = &aiov; 3637 auio.uio_iovcnt = 1; 3638 auio.uio_offset = 0; 3639 if (nbytes > INT_MAX) { 3640 error = EINVAL; 3641 goto done; 3642 } 3643 auio.uio_resid = nbytes; 3644 auio.uio_rw = UIO_WRITE; 3645 auio.uio_segflg = UIO_USERSPACE; 3646 auio.uio_procp = p; 3647 cnt = nbytes; 3648 3649 error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio, 3650 p->p_ucred, p); 3651 cnt -= auio.uio_resid; 3652 retval[0] = cnt; 3653 3654 done: 3655 VOP_UNLOCK(vp, 0); 3656 vn_finished_write(mp, 0); 3657 return (error); 3658 } 3659 3660 int 3661 sys_extattr_set_fd(struct lwp *l, void *v, register_t *retval) 3662 { 3663 struct sys_extattr_set_fd_args /* { 3664 syscallarg(int) fd; 3665 syscallarg(int) attrnamespace; 3666 syscallarg(const char *) attrname; 3667 syscallarg(const void *) data; 3668 syscallarg(size_t) nbytes; 3669 } */ *uap = v; 3670 struct proc *p = l->l_proc; 3671 struct file *fp; 3672 struct vnode *vp; 3673 char attrname[EXTATTR_MAXNAMELEN]; 3674 int error; 3675 3676 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3677 NULL); 3678 if (error) 3679 return (error); 3680 3681 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 3682 if (error) 3683 return (error); 3684 vp = (struct vnode *) fp->f_data; 3685 3686 error = extattr_set_vp(vp, SCARG(uap, attrnamespace), attrname, 3687 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3688 3689 FILE_UNUSE(fp, p); 3690 return (error); 3691 } 3692 3693 int 3694 sys_extattr_set_file(struct lwp *l, void *v, register_t *retval) 3695 { 3696 struct sys_extattr_set_file_args /* { 3697 syscallarg(const char *) path; 3698 syscallarg(int) attrnamespace; 3699 syscallarg(const char *) attrname; 3700 syscallarg(const void *) data; 3701 syscallarg(size_t) nbytes; 3702 } */ *uap = v; 3703 struct proc *p = l->l_proc; 3704 struct nameidata nd; 3705 char attrname[EXTATTR_MAXNAMELEN]; 3706 int error; 3707 3708 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3709 NULL); 3710 if (error) 3711 return (error); 3712 3713 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3714 error = namei(&nd); 3715 if (error) 3716 return (error); 3717 3718 error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3719 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3720 3721 vrele(nd.ni_vp); 3722 return (error); 3723 } 3724 3725 int 3726 sys_extattr_set_link(struct lwp *l, void *v, register_t *retval) 3727 { 3728 struct sys_extattr_set_link_args /* { 3729 syscallarg(const char *) path; 3730 syscallarg(int) attrnamespace; 3731 syscallarg(const char *) attrname; 3732 syscallarg(const void *) data; 3733 syscallarg(size_t) nbytes; 3734 } */ *uap = v; 3735 struct proc *p = l->l_proc; 3736 struct nameidata nd; 3737 char attrname[EXTATTR_MAXNAMELEN]; 3738 int error; 3739 3740 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3741 NULL); 3742 if (error) 3743 return (error); 3744 3745 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3746 error = namei(&nd); 3747 if (error) 3748 return (error); 3749 3750 error = extattr_set_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3751 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3752 3753 vrele(nd.ni_vp); 3754 return (error); 3755 } 3756 3757 /* 3758 * Get a named extended attribute on a file or directory. 3759 */ 3760 static int 3761 extattr_get_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3762 void *data, size_t nbytes, struct proc *p, register_t *retval) 3763 { 3764 struct uio auio, *auiop; 3765 struct iovec aiov; 3766 ssize_t cnt; 3767 size_t size, *sizep; 3768 int error; 3769 3770 VOP_LEASE(vp, p, p->p_ucred, LEASE_READ); 3771 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3772 3773 /* 3774 * Slightly unusual semantics: if the user provides a NULL data 3775 * pointer, they don't want to receive the data, just the maximum 3776 * read length. 3777 */ 3778 auiop = NULL; 3779 sizep = NULL; 3780 cnt = 0; 3781 if (data != NULL) { 3782 aiov.iov_base = data; 3783 aiov.iov_len = nbytes; 3784 auio.uio_iov = &aiov; 3785 auio.uio_offset = 0; 3786 if (nbytes > INT_MAX) { 3787 error = EINVAL; 3788 goto done; 3789 } 3790 auio.uio_resid = nbytes; 3791 auio.uio_rw = UIO_READ; 3792 auio.uio_segflg = UIO_USERSPACE; 3793 auio.uio_procp = p; 3794 auiop = &auio; 3795 cnt = nbytes; 3796 } else 3797 sizep = &size; 3798 3799 error = VOP_GETEXTATTR(vp, attrnamespace, attrname, auiop, sizep, 3800 p->p_ucred, p); 3801 3802 if (auiop != NULL) { 3803 cnt -= auio.uio_resid; 3804 retval[0] = cnt; 3805 } else 3806 retval[0] = size; 3807 3808 done: 3809 VOP_UNLOCK(vp, 0); 3810 return (error); 3811 } 3812 3813 int 3814 sys_extattr_get_fd(struct lwp *l, void *v, register_t *retval) 3815 { 3816 struct sys_extattr_get_fd_args /* { 3817 syscallarg(int) fd; 3818 syscallarg(int) attrnamespace; 3819 syscallarg(const char *) attrname; 3820 syscallarg(void *) data; 3821 syscallarg(size_t) nbytes; 3822 } */ *uap = v; 3823 struct proc *p = l->l_proc; 3824 struct file *fp; 3825 struct vnode *vp; 3826 char attrname[EXTATTR_MAXNAMELEN]; 3827 int error; 3828 3829 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3830 NULL); 3831 if (error) 3832 return (error); 3833 3834 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 3835 if (error) 3836 return (error); 3837 vp = (struct vnode *) fp->f_data; 3838 3839 error = extattr_get_vp(vp, SCARG(uap, attrnamespace), attrname, 3840 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3841 3842 FILE_UNUSE(fp, p); 3843 return (error); 3844 } 3845 3846 int 3847 sys_extattr_get_file(struct lwp *l, void *v, register_t *retval) 3848 { 3849 struct sys_extattr_get_file_args /* { 3850 syscallarg(const char *) path; 3851 syscallarg(int) attrnamespace; 3852 syscallarg(const char *) attrname; 3853 syscallarg(void *) data; 3854 syscallarg(size_t) nbytes; 3855 } */ *uap = v; 3856 struct proc *p = l->l_proc; 3857 struct nameidata nd; 3858 char attrname[EXTATTR_MAXNAMELEN]; 3859 int error; 3860 3861 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3862 NULL); 3863 if (error) 3864 return (error); 3865 3866 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3867 error = namei(&nd); 3868 if (error) 3869 return (error); 3870 3871 error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3872 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3873 3874 vrele(nd.ni_vp); 3875 return (error); 3876 } 3877 3878 int 3879 sys_extattr_get_link(struct lwp *l, void *v, register_t *retval) 3880 { 3881 struct sys_extattr_get_link_args /* { 3882 syscallarg(const char *) path; 3883 syscallarg(int) attrnamespace; 3884 syscallarg(const char *) attrname; 3885 syscallarg(void *) data; 3886 syscallarg(size_t) nbytes; 3887 } */ *uap = v; 3888 struct proc *p = l->l_proc; 3889 struct nameidata nd; 3890 char attrname[EXTATTR_MAXNAMELEN]; 3891 int error; 3892 3893 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3894 NULL); 3895 if (error) 3896 return (error); 3897 3898 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3899 error = namei(&nd); 3900 if (error) 3901 return (error); 3902 3903 error = extattr_get_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3904 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 3905 3906 vrele(nd.ni_vp); 3907 return (error); 3908 } 3909 3910 /* 3911 * Delete a named extended attribute on a file or directory. 3912 */ 3913 static int 3914 extattr_delete_vp(struct vnode *vp, int attrnamespace, const char *attrname, 3915 struct proc *p) 3916 { 3917 struct mount *mp; 3918 int error; 3919 3920 error = vn_start_write(vp, &mp, V_WAIT | V_PCATCH); 3921 if (error) 3922 return (error); 3923 VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE); 3924 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 3925 3926 error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, p->p_ucred, p); 3927 if (error == EOPNOTSUPP) 3928 error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL, 3929 p->p_ucred, p); 3930 3931 VOP_UNLOCK(vp, 0); 3932 vn_finished_write(mp, 0); 3933 return (error); 3934 } 3935 3936 int 3937 sys_extattr_delete_fd(struct lwp *l, void *v, register_t *retval) 3938 { 3939 struct sys_extattr_delete_fd_args /* { 3940 syscallarg(int) fd; 3941 syscallarg(int) attrnamespace; 3942 syscallarg(const char *) attrname; 3943 } */ *uap = v; 3944 struct proc *p = l->l_proc; 3945 struct file *fp; 3946 struct vnode *vp; 3947 char attrname[EXTATTR_MAXNAMELEN]; 3948 int error; 3949 3950 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3951 NULL); 3952 if (error) 3953 return (error); 3954 3955 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 3956 if (error) 3957 return (error); 3958 vp = (struct vnode *) fp->f_data; 3959 3960 error = extattr_delete_vp(vp, SCARG(uap, attrnamespace), attrname, p); 3961 3962 FILE_UNUSE(fp, p); 3963 return (error); 3964 } 3965 3966 int 3967 sys_extattr_delete_file(struct lwp *l, void *v, register_t *retval) 3968 { 3969 struct sys_extattr_delete_file_args /* { 3970 syscallarg(const char *) path; 3971 syscallarg(int) attrnamespace; 3972 syscallarg(const char *) attrname; 3973 } */ *uap = v; 3974 struct proc *p = l->l_proc; 3975 struct nameidata nd; 3976 char attrname[EXTATTR_MAXNAMELEN]; 3977 int error; 3978 3979 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 3980 NULL); 3981 if (error) 3982 return (error); 3983 3984 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 3985 error = namei(&nd); 3986 if (error) 3987 return (error); 3988 3989 error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 3990 p); 3991 3992 vrele(nd.ni_vp); 3993 return (error); 3994 } 3995 3996 int 3997 sys_extattr_delete_link(struct lwp *l, void *v, register_t *retval) 3998 { 3999 struct sys_extattr_delete_link_args /* { 4000 syscallarg(const char *) path; 4001 syscallarg(int) attrnamespace; 4002 syscallarg(const char *) attrname; 4003 } */ *uap = v; 4004 struct proc *p = l->l_proc; 4005 struct nameidata nd; 4006 char attrname[EXTATTR_MAXNAMELEN]; 4007 int error; 4008 4009 error = copyinstr(SCARG(uap, attrname), attrname, sizeof(attrname), 4010 NULL); 4011 if (error) 4012 return (error); 4013 4014 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4015 error = namei(&nd); 4016 if (error) 4017 return (error); 4018 4019 error = extattr_delete_vp(nd.ni_vp, SCARG(uap, attrnamespace), attrname, 4020 p); 4021 4022 vrele(nd.ni_vp); 4023 return (error); 4024 } 4025 4026 /* 4027 * Retrieve a list of extended attributes on a file or directory. 4028 */ 4029 static int 4030 extattr_list_vp(struct vnode *vp, int attrnamespace, void *data, size_t nbytes, 4031 struct proc *p, register_t *retval) 4032 { 4033 struct uio auio, *auiop; 4034 size_t size, *sizep; 4035 struct iovec aiov; 4036 ssize_t cnt; 4037 int error; 4038 4039 VOP_LEASE(vp, p, p->p_ucred, LEASE_READ); 4040 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 4041 4042 auiop = NULL; 4043 sizep = NULL; 4044 cnt = 0; 4045 if (data != NULL) { 4046 aiov.iov_base = data; 4047 aiov.iov_len = nbytes; 4048 auio.uio_iov = &aiov; 4049 auio.uio_offset = 0; 4050 if (nbytes > INT_MAX) { 4051 error = EINVAL; 4052 goto done; 4053 } 4054 auio.uio_resid = nbytes; 4055 auio.uio_rw = UIO_READ; 4056 auio.uio_segflg = UIO_USERSPACE; 4057 auio.uio_procp = p; 4058 auiop = &auio; 4059 cnt = nbytes; 4060 } else 4061 sizep = &size; 4062 4063 error = VOP_LISTEXTATTR(vp, attrnamespace, auiop, sizep, 4064 p->p_ucred, p); 4065 4066 if (auiop != NULL) { 4067 cnt -= auio.uio_resid; 4068 retval[0] = cnt; 4069 } else 4070 retval[0] = size; 4071 4072 done: 4073 VOP_UNLOCK(vp, 0); 4074 return (error); 4075 } 4076 4077 int 4078 sys_extattr_list_fd(struct lwp *l, void *v, register_t *retval) 4079 { 4080 struct sys_extattr_list_fd_args /* { 4081 syscallarg(int) fd; 4082 syscallarg(int) attrnamespace; 4083 syscallarg(void *) data; 4084 syscallarg(size_t) nbytes; 4085 } */ *uap = v; 4086 struct proc *p = l->l_proc; 4087 struct file *fp; 4088 struct vnode *vp; 4089 int error; 4090 4091 error = getvnode(p->p_fd, SCARG(uap, fd), &fp); 4092 if (error) 4093 return (error); 4094 vp = (struct vnode *) fp->f_data; 4095 4096 error = extattr_list_vp(vp, SCARG(uap, attrnamespace), 4097 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 4098 4099 FILE_UNUSE(fp, p); 4100 return (error); 4101 } 4102 4103 int 4104 sys_extattr_list_file(struct lwp *l, void *v, register_t *retval) 4105 { 4106 struct sys_extattr_list_file_args /* { 4107 syscallarg(const char *) path; 4108 syscallarg(int) attrnamespace; 4109 syscallarg(void *) data; 4110 syscallarg(size_t) nbytes; 4111 } */ *uap = v; 4112 struct proc *p = l->l_proc; 4113 struct nameidata nd; 4114 int error; 4115 4116 NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4117 error = namei(&nd); 4118 if (error) 4119 return (error); 4120 4121 error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace), 4122 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 4123 4124 vrele(nd.ni_vp); 4125 return (error); 4126 } 4127 4128 int 4129 sys_extattr_list_link(struct lwp *l, void *v, register_t *retval) 4130 { 4131 struct sys_extattr_list_link_args /* { 4132 syscallarg(const char *) path; 4133 syscallarg(int) attrnamespace; 4134 syscallarg(void *) data; 4135 syscallarg(size_t) nbytes; 4136 } */ *uap = v; 4137 struct proc *p = l->l_proc; 4138 struct nameidata nd; 4139 int error; 4140 4141 NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p); 4142 error = namei(&nd); 4143 if (error) 4144 return (error); 4145 4146 error = extattr_list_vp(nd.ni_vp, SCARG(uap, attrnamespace), 4147 SCARG(uap, data), SCARG(uap, nbytes), p, retval); 4148 4149 vrele(nd.ni_vp); 4150 return (error); 4151 } 4152
Indexes created Fri Sep 26 20:09:58 GMT 2025