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sys/ufs/ufs/ufs_vnops.c
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1 /* $NetBSD: ufs_vnops.c,v 1.143.2.3 2007/03/10 18:40:49 bouyer Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1993, 1995 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 * @(#)ufs_vnops.c 8.28 (Berkeley) 7/31/95 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: ufs_vnops.c,v 1.143.2.3 2007/03/10 18:40:49 bouyer Exp $"); 41 42 #if defined(_KERNEL_OPT) 43 #include "opt_ffs.h" 44 #include "opt_quota.h" 45 #include "fs_lfs.h" 46 #endif 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/namei.h> 51 #include <sys/resourcevar.h> 52 #include <sys/kernel.h> 53 #include <sys/file.h> 54 #include <sys/stat.h> 55 #include <sys/buf.h> 56 #include <sys/proc.h> 57 #include <sys/mount.h> 58 #include <sys/vnode.h> 59 #include <sys/malloc.h> 60 #include <sys/dirent.h> 61 #include <sys/lockf.h> 62 #include <sys/kauth.h> 63 64 #include <miscfs/specfs/specdev.h> 65 #include <miscfs/fifofs/fifo.h> 66 67 #include <ufs/ufs/quota.h> 68 #include <ufs/ufs/inode.h> 69 #include <ufs/ufs/dir.h> 70 #include <ufs/ufs/ufsmount.h> 71 #include <ufs/ufs/ufs_bswap.h> 72 #include <ufs/ufs/ufs_extern.h> 73 #ifdef UFS_DIRHASH 74 #include <ufs/ufs/dirhash.h> 75 #endif 76 #include <ufs/ext2fs/ext2fs_extern.h> 77 #include <ufs/ffs/ffs_extern.h> 78 #include <ufs/lfs/lfs_extern.h> 79 80 #include <uvm/uvm.h> 81 82 static int ufs_chmod(struct vnode *, int, kauth_cred_t, struct lwp *); 83 static int ufs_chown(struct vnode *, uid_t, gid_t, kauth_cred_t, 84 struct lwp *); 85 86 /* 87 * A virgin directory (no blushing please). 88 */ 89 static const struct dirtemplate mastertemplate = { 90 0, 12, DT_DIR, 1, ".", 91 0, DIRBLKSIZ - 12, DT_DIR, 2, ".." 92 }; 93 94 /* 95 * Create a regular file 96 */ 97 int 98 ufs_create(void *v) 99 { 100 struct vop_create_args /* { 101 struct vnode *a_dvp; 102 struct vnode **a_vpp; 103 struct componentname *a_cnp; 104 struct vattr *a_vap; 105 } */ *ap = v; 106 int error; 107 108 error = 109 ufs_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode), 110 ap->a_dvp, ap->a_vpp, ap->a_cnp); 111 if (error) 112 return (error); 113 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 114 return (0); 115 } 116 117 /* 118 * Mknod vnode call 119 */ 120 /* ARGSUSED */ 121 int 122 ufs_mknod(void *v) 123 { 124 struct vop_mknod_args /* { 125 struct vnode *a_dvp; 126 struct vnode **a_vpp; 127 struct componentname *a_cnp; 128 struct vattr *a_vap; 129 } */ *ap = v; 130 struct vattr *vap; 131 struct vnode **vpp; 132 struct inode *ip; 133 int error; 134 struct mount *mp; 135 ino_t ino; 136 137 vap = ap->a_vap; 138 vpp = ap->a_vpp; 139 if ((error = 140 ufs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), 141 ap->a_dvp, vpp, ap->a_cnp)) != 0) 142 return (error); 143 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 144 ip = VTOI(*vpp); 145 mp = (*vpp)->v_mount; 146 ino = ip->i_number; 147 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 148 if (vap->va_rdev != VNOVAL) { 149 struct ufsmount *ump = ip->i_ump; 150 /* 151 * Want to be able to use this to make badblock 152 * inodes, so don't truncate the dev number. 153 */ 154 if (ump->um_fstype == UFS1) 155 ip->i_ffs1_rdev = ufs_rw32(vap->va_rdev, 156 UFS_MPNEEDSWAP(ump)); 157 else 158 ip->i_ffs2_rdev = ufs_rw64(vap->va_rdev, 159 UFS_MPNEEDSWAP(ump)); 160 } 161 /* 162 * Remove inode so that it will be reloaded by VFS_VGET and 163 * checked to see if it is an alias of an existing entry in 164 * the inode cache. 165 */ 166 vput(*vpp); 167 (*vpp)->v_type = VNON; 168 vgone(*vpp); 169 error = VFS_VGET(mp, ino, vpp); 170 if (error != 0) { 171 *vpp = NULL; 172 return (error); 173 } 174 return (0); 175 } 176 177 /* 178 * Open called. 179 * 180 * Nothing to do. 181 */ 182 /* ARGSUSED */ 183 int 184 ufs_open(void *v) 185 { 186 struct vop_open_args /* { 187 struct vnode *a_vp; 188 int a_mode; 189 kauth_cred_t a_cred; 190 struct lwp *a_l; 191 } */ *ap = v; 192 193 /* 194 * Files marked append-only must be opened for appending. 195 */ 196 if ((VTOI(ap->a_vp)->i_flags & APPEND) && 197 (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) 198 return (EPERM); 199 return (0); 200 } 201 202 /* 203 * Close called. 204 * 205 * Update the times on the inode. 206 */ 207 /* ARGSUSED */ 208 int 209 ufs_close(void *v) 210 { 211 struct vop_close_args /* { 212 struct vnode *a_vp; 213 int a_fflag; 214 kauth_cred_t a_cred; 215 struct lwp *a_l; 216 } */ *ap = v; 217 struct vnode *vp; 218 struct inode *ip; 219 220 vp = ap->a_vp; 221 ip = VTOI(vp); 222 simple_lock(&vp->v_interlock); 223 if (vp->v_usecount > 1) 224 UFS_ITIMES(vp, NULL, NULL, NULL); 225 simple_unlock(&vp->v_interlock); 226 return (0); 227 } 228 229 int 230 ufs_access(void *v) 231 { 232 struct vop_access_args /* { 233 struct vnode *a_vp; 234 int a_mode; 235 kauth_cred_t a_cred; 236 struct lwp *a_l; 237 } */ *ap = v; 238 struct vnode *vp; 239 struct inode *ip; 240 mode_t mode; 241 #ifdef QUOTA 242 int error; 243 #endif 244 245 vp = ap->a_vp; 246 ip = VTOI(vp); 247 mode = ap->a_mode; 248 /* 249 * Disallow write attempts on read-only file systems; 250 * unless the file is a socket, fifo, or a block or 251 * character device resident on the file system. 252 */ 253 if (mode & VWRITE) { 254 switch (vp->v_type) { 255 case VDIR: 256 case VLNK: 257 case VREG: 258 if (vp->v_mount->mnt_flag & MNT_RDONLY) 259 return (EROFS); 260 #ifdef QUOTA 261 if ((error = getinoquota(ip)) != 0) 262 return (error); 263 #endif 264 break; 265 case VBAD: 266 case VBLK: 267 case VCHR: 268 case VSOCK: 269 case VFIFO: 270 case VNON: 271 default: 272 break; 273 } 274 } 275 276 /* If immutable bit set, nobody gets to write it. */ 277 if ((mode & VWRITE) && (ip->i_flags & (IMMUTABLE | SF_SNAPSHOT))) 278 return (EPERM); 279 280 return (vaccess(vp->v_type, ip->i_mode & ALLPERMS, 281 ip->i_uid, ip->i_gid, mode, ap->a_cred)); 282 } 283 284 /* ARGSUSED */ 285 int 286 ufs_getattr(void *v) 287 { 288 struct vop_getattr_args /* { 289 struct vnode *a_vp; 290 struct vattr *a_vap; 291 kauth_cred_t a_cred; 292 struct lwp *a_l; 293 } */ *ap = v; 294 struct vnode *vp; 295 struct inode *ip; 296 struct vattr *vap; 297 298 vp = ap->a_vp; 299 ip = VTOI(vp); 300 vap = ap->a_vap; 301 UFS_ITIMES(vp, NULL, NULL, NULL); 302 303 /* 304 * Copy from inode table 305 */ 306 vap->va_fsid = ip->i_dev; 307 vap->va_fileid = ip->i_number; 308 vap->va_mode = ip->i_mode & ALLPERMS; 309 vap->va_nlink = ip->i_ffs_effnlink; 310 vap->va_uid = ip->i_uid; 311 vap->va_gid = ip->i_gid; 312 vap->va_size = vp->v_size; 313 if (ip->i_ump->um_fstype == UFS1) { 314 vap->va_rdev = (dev_t)ufs_rw32(ip->i_ffs1_rdev, 315 UFS_MPNEEDSWAP(ip->i_ump)); 316 vap->va_atime.tv_sec = ip->i_ffs1_atime; 317 vap->va_atime.tv_nsec = ip->i_ffs1_atimensec; 318 vap->va_mtime.tv_sec = ip->i_ffs1_mtime; 319 vap->va_mtime.tv_nsec = ip->i_ffs1_mtimensec; 320 vap->va_ctime.tv_sec = ip->i_ffs1_ctime; 321 vap->va_ctime.tv_nsec = ip->i_ffs1_ctimensec; 322 vap->va_birthtime.tv_sec = 0; 323 vap->va_birthtime.tv_nsec = 0; 324 vap->va_bytes = dbtob((u_quad_t)ip->i_ffs1_blocks); 325 } else { 326 vap->va_rdev = (dev_t)ufs_rw64(ip->i_ffs2_rdev, 327 UFS_MPNEEDSWAP(ip->i_ump)); 328 vap->va_atime.tv_sec = ip->i_ffs2_atime; 329 vap->va_atime.tv_nsec = ip->i_ffs2_atimensec; 330 vap->va_mtime.tv_sec = ip->i_ffs2_mtime; 331 vap->va_mtime.tv_nsec = ip->i_ffs2_mtimensec; 332 vap->va_ctime.tv_sec = ip->i_ffs2_ctime; 333 vap->va_ctime.tv_nsec = ip->i_ffs2_ctimensec; 334 vap->va_birthtime.tv_sec = ip->i_ffs2_birthtime; 335 vap->va_birthtime.tv_nsec = ip->i_ffs2_birthnsec; 336 vap->va_bytes = dbtob(ip->i_ffs2_blocks); 337 } 338 vap->va_gen = ip->i_gen; 339 vap->va_flags = ip->i_flags; 340 341 /* this doesn't belong here */ 342 if (vp->v_type == VBLK) 343 vap->va_blocksize = BLKDEV_IOSIZE; 344 else if (vp->v_type == VCHR) 345 vap->va_blocksize = MAXBSIZE; 346 else 347 vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; 348 vap->va_type = vp->v_type; 349 vap->va_filerev = ip->i_modrev; 350 return (0); 351 } 352 353 /* 354 * Set attribute vnode op. called from several syscalls 355 */ 356 int 357 ufs_setattr(void *v) 358 { 359 struct vop_setattr_args /* { 360 struct vnode *a_vp; 361 struct vattr *a_vap; 362 kauth_cred_t a_cred; 363 struct lwp *a_l; 364 } */ *ap = v; 365 struct vattr *vap; 366 struct vnode *vp; 367 struct inode *ip; 368 kauth_cred_t cred; 369 struct lwp *l; 370 int error; 371 372 vap = ap->a_vap; 373 vp = ap->a_vp; 374 ip = VTOI(vp); 375 cred = ap->a_cred; 376 l = ap->a_l; 377 378 /* 379 * Check for unsettable attributes. 380 */ 381 if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || 382 (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || 383 (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || 384 ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { 385 return (EINVAL); 386 } 387 if (vap->va_flags != VNOVAL) { 388 if (vp->v_mount->mnt_flag & MNT_RDONLY) 389 return (EROFS); 390 if (kauth_cred_geteuid(cred) != ip->i_uid && 391 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 392 &l->l_acflag))) 393 return (error); 394 if (kauth_cred_geteuid(cred) == 0) { 395 if ((ip->i_flags & (SF_IMMUTABLE | SF_APPEND)) && 396 securelevel > 0) 397 return (EPERM); 398 /* Snapshot flag cannot be set or cleared */ 399 if ((vap->va_flags & SF_SNAPSHOT) != 400 (ip->i_flags & SF_SNAPSHOT)) 401 return (EPERM); 402 ip->i_flags = vap->va_flags; 403 DIP_ASSIGN(ip, flags, ip->i_flags); 404 } else { 405 if ((ip->i_flags & (SF_IMMUTABLE | SF_APPEND)) || 406 (vap->va_flags & UF_SETTABLE) != vap->va_flags) 407 return (EPERM); 408 if ((ip->i_flags & SF_SETTABLE) != 409 (vap->va_flags & SF_SETTABLE)) 410 return (EPERM); 411 ip->i_flags &= SF_SETTABLE; 412 ip->i_flags |= (vap->va_flags & UF_SETTABLE); 413 DIP_ASSIGN(ip, flags, ip->i_flags); 414 } 415 ip->i_flag |= IN_CHANGE; 416 if (vap->va_flags & (IMMUTABLE | APPEND)) 417 return (0); 418 } 419 if (ip->i_flags & (IMMUTABLE | APPEND)) 420 return (EPERM); 421 /* 422 * Go through the fields and update iff not VNOVAL. 423 */ 424 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { 425 if (vp->v_mount->mnt_flag & MNT_RDONLY) 426 return (EROFS); 427 error = ufs_chown(vp, vap->va_uid, vap->va_gid, cred, l); 428 if (error) 429 return (error); 430 } 431 if (vap->va_size != VNOVAL) { 432 /* 433 * Disallow write attempts on read-only file systems; 434 * unless the file is a socket, fifo, or a block or 435 * character device resident on the file system. 436 */ 437 switch (vp->v_type) { 438 case VDIR: 439 return (EISDIR); 440 case VCHR: 441 case VBLK: 442 case VFIFO: 443 break; 444 case VREG: 445 if (vp->v_mount->mnt_flag & MNT_RDONLY) 446 return (EROFS); 447 if ((ip->i_flags & SF_SNAPSHOT) != 0) 448 return (EPERM); 449 error = UFS_TRUNCATE(vp, vap->va_size, 0, cred, l); 450 if (error) 451 return (error); 452 break; 453 default: 454 return (EOPNOTSUPP); 455 } 456 } 457 ip = VTOI(vp); 458 if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL || 459 vap->va_birthtime.tv_sec != VNOVAL) { 460 if (vp->v_mount->mnt_flag & MNT_RDONLY) 461 return (EROFS); 462 if ((ip->i_flags & SF_SNAPSHOT) != 0) 463 return (EPERM); 464 if (kauth_cred_geteuid(cred) != ip->i_uid && 465 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 466 &l->l_acflag)) && 467 ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || 468 (error = VOP_ACCESS(vp, VWRITE, cred, l)))) 469 return (error); 470 if (vap->va_atime.tv_sec != VNOVAL) 471 if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) 472 ip->i_flag |= IN_ACCESS; 473 if (vap->va_mtime.tv_sec != VNOVAL) 474 ip->i_flag |= IN_CHANGE | IN_UPDATE; 475 if (vap->va_birthtime.tv_sec != VNOVAL && 476 ip->i_ump->um_fstype == UFS2) { 477 ip->i_ffs2_birthtime = vap->va_birthtime.tv_sec; 478 ip->i_ffs2_birthnsec = vap->va_birthtime.tv_nsec; 479 } 480 error = UFS_UPDATE(vp, &vap->va_atime, &vap->va_mtime, 0); 481 if (error) 482 return (error); 483 } 484 error = 0; 485 if (vap->va_mode != (mode_t)VNOVAL) { 486 if (vp->v_mount->mnt_flag & MNT_RDONLY) 487 return (EROFS); 488 if ((ip->i_flags & SF_SNAPSHOT) != 0 && 489 (vap->va_mode & (S_IXUSR | S_IWUSR | S_IXGRP | S_IWGRP | 490 S_IXOTH | S_IWOTH))) 491 return (EPERM); 492 error = ufs_chmod(vp, (int)vap->va_mode, cred, l); 493 } 494 VN_KNOTE(vp, NOTE_ATTRIB); 495 return (error); 496 } 497 498 /* 499 * Change the mode on a file. 500 * Inode must be locked before calling. 501 */ 502 static int 503 ufs_chmod(struct vnode *vp, int mode, kauth_cred_t cred, struct lwp *l) 504 { 505 struct inode *ip; 506 int error, ismember = 0; 507 508 ip = VTOI(vp); 509 if (kauth_cred_geteuid(cred) != ip->i_uid && 510 (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 511 &l->l_acflag))) 512 return (error); 513 if (kauth_cred_geteuid(cred)) { 514 if (vp->v_type != VDIR && (mode & S_ISTXT)) 515 return (EFTYPE); 516 if ((kauth_cred_ismember_gid(cred, ip->i_gid, &ismember) != 0 || 517 !ismember) && (mode & ISGID)) 518 return (EPERM); 519 } 520 ip->i_mode &= ~ALLPERMS; 521 ip->i_mode |= (mode & ALLPERMS); 522 ip->i_flag |= IN_CHANGE; 523 DIP_ASSIGN(ip, mode, ip->i_mode); 524 return (0); 525 } 526 527 /* 528 * Perform chown operation on inode ip; 529 * inode must be locked prior to call. 530 */ 531 static int 532 ufs_chown(struct vnode *vp, uid_t uid, gid_t gid, kauth_cred_t cred, 533 struct lwp *l) 534 { 535 struct inode *ip; 536 int error, ismember = 0; 537 #ifdef QUOTA 538 uid_t ouid; 539 gid_t ogid; 540 int i; 541 int64_t change; 542 #endif 543 ip = VTOI(vp); 544 error = 0; 545 546 if (uid == (uid_t)VNOVAL) 547 uid = ip->i_uid; 548 if (gid == (gid_t)VNOVAL) 549 gid = ip->i_gid; 550 /* 551 * If we don't own the file, are trying to change the owner 552 * of the file, or are not a member of the target group, 553 * the caller's credentials must imply super-user privilege 554 * or the call fails. 555 */ 556 if ((kauth_cred_geteuid(cred) != ip->i_uid || uid != ip->i_uid || 557 (gid != ip->i_gid && 558 !(kauth_cred_getegid(cred) == gid || 559 (kauth_cred_ismember_gid(cred, gid, &ismember) == 0 && 560 ismember)))) && 561 ((error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, 562 &l->l_acflag)) != 0)) 563 return (error); 564 565 #ifdef QUOTA 566 ogid = ip->i_gid; 567 ouid = ip->i_uid; 568 if ((error = getinoquota(ip)) != 0) 569 return (error); 570 if (ouid == uid) { 571 dqrele(vp, ip->i_dquot[USRQUOTA]); 572 ip->i_dquot[USRQUOTA] = NODQUOT; 573 } 574 if (ogid == gid) { 575 dqrele(vp, ip->i_dquot[GRPQUOTA]); 576 ip->i_dquot[GRPQUOTA] = NODQUOT; 577 } 578 change = DIP(ip, blocks); 579 (void) chkdq(ip, -change, cred, CHOWN); 580 (void) chkiq(ip, -1, cred, CHOWN); 581 for (i = 0; i < MAXQUOTAS; i++) { 582 dqrele(vp, ip->i_dquot[i]); 583 ip->i_dquot[i] = NODQUOT; 584 } 585 #endif 586 ip->i_gid = gid; 587 DIP_ASSIGN(ip, gid, gid); 588 ip->i_uid = uid; 589 DIP_ASSIGN(ip, uid, uid); 590 #ifdef QUOTA 591 if ((error = getinoquota(ip)) == 0) { 592 if (ouid == uid) { 593 dqrele(vp, ip->i_dquot[USRQUOTA]); 594 ip->i_dquot[USRQUOTA] = NODQUOT; 595 } 596 if (ogid == gid) { 597 dqrele(vp, ip->i_dquot[GRPQUOTA]); 598 ip->i_dquot[GRPQUOTA] = NODQUOT; 599 } 600 if ((error = chkdq(ip, change, cred, CHOWN)) == 0) { 601 if ((error = chkiq(ip, 1, cred, CHOWN)) == 0) 602 goto good; 603 else 604 (void) chkdq(ip, -change, cred, CHOWN|FORCE); 605 } 606 for (i = 0; i < MAXQUOTAS; i++) { 607 dqrele(vp, ip->i_dquot[i]); 608 ip->i_dquot[i] = NODQUOT; 609 } 610 } 611 ip->i_gid = ogid; 612 DIP_ASSIGN(ip, gid, ogid); 613 ip->i_uid = ouid; 614 DIP_ASSIGN(ip, uid, ouid); 615 if (getinoquota(ip) == 0) { 616 if (ouid == uid) { 617 dqrele(vp, ip->i_dquot[USRQUOTA]); 618 ip->i_dquot[USRQUOTA] = NODQUOT; 619 } 620 if (ogid == gid) { 621 dqrele(vp, ip->i_dquot[GRPQUOTA]); 622 ip->i_dquot[GRPQUOTA] = NODQUOT; 623 } 624 (void) chkdq(ip, change, cred, FORCE|CHOWN); 625 (void) chkiq(ip, 1, cred, FORCE|CHOWN); 626 (void) getinoquota(ip); 627 } 628 return (error); 629 good: 630 if (getinoquota(ip)) 631 panic("chown: lost quota"); 632 #endif /* QUOTA */ 633 ip->i_flag |= IN_CHANGE; 634 return (0); 635 } 636 637 int 638 ufs_remove(void *v) 639 { 640 struct vop_remove_args /* { 641 struct vnode *a_dvp; 642 struct vnode *a_vp; 643 struct componentname *a_cnp; 644 } */ *ap = v; 645 struct vnode *vp, *dvp; 646 struct inode *ip; 647 int error; 648 649 vp = ap->a_vp; 650 dvp = ap->a_dvp; 651 ip = VTOI(vp); 652 if (vp->v_type == VDIR || (ip->i_flags & (IMMUTABLE | APPEND)) || 653 (VTOI(dvp)->i_flags & APPEND)) 654 error = EPERM; 655 else 656 error = ufs_dirremove(dvp, ip, ap->a_cnp->cn_flags, 0); 657 VN_KNOTE(vp, NOTE_DELETE); 658 VN_KNOTE(dvp, NOTE_WRITE); 659 if (dvp == vp) 660 vrele(vp); 661 else 662 vput(vp); 663 vput(dvp); 664 return (error); 665 } 666 667 /* 668 * link vnode call 669 */ 670 int 671 ufs_link(void *v) 672 { 673 struct vop_link_args /* { 674 struct vnode *a_dvp; 675 struct vnode *a_vp; 676 struct componentname *a_cnp; 677 } */ *ap = v; 678 struct vnode *vp, *dvp; 679 struct componentname *cnp; 680 struct inode *ip; 681 struct direct *newdir; 682 int error; 683 684 dvp = ap->a_dvp; 685 vp = ap->a_vp; 686 cnp = ap->a_cnp; 687 #ifdef DIAGNOSTIC 688 if ((cnp->cn_flags & HASBUF) == 0) 689 panic("ufs_link: no name"); 690 #endif 691 if (vp->v_type == VDIR) { 692 VOP_ABORTOP(dvp, cnp); 693 error = EPERM; 694 goto out2; 695 } 696 if (dvp->v_mount != vp->v_mount) { 697 VOP_ABORTOP(dvp, cnp); 698 error = EXDEV; 699 goto out2; 700 } 701 if (dvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE))) { 702 VOP_ABORTOP(dvp, cnp); 703 goto out2; 704 } 705 ip = VTOI(vp); 706 if ((nlink_t)ip->i_nlink >= LINK_MAX) { 707 VOP_ABORTOP(dvp, cnp); 708 error = EMLINK; 709 goto out1; 710 } 711 if (ip->i_flags & (IMMUTABLE | APPEND)) { 712 VOP_ABORTOP(dvp, cnp); 713 error = EPERM; 714 goto out1; 715 } 716 ip->i_ffs_effnlink++; 717 ip->i_nlink++; 718 DIP_ASSIGN(ip, nlink, ip->i_nlink); 719 ip->i_flag |= IN_CHANGE; 720 if (DOINGSOFTDEP(vp)) 721 softdep_change_linkcnt(ip); 722 error = UFS_UPDATE(vp, NULL, NULL, UPDATE_DIROP); 723 if (!error) { 724 newdir = pool_get(&ufs_direct_pool, PR_WAITOK); 725 ufs_makedirentry(ip, cnp, newdir); 726 error = ufs_direnter(dvp, vp, newdir, cnp, NULL); 727 pool_put(&ufs_direct_pool, newdir); 728 } 729 if (error) { 730 ip->i_ffs_effnlink--; 731 ip->i_nlink--; 732 DIP_ASSIGN(ip, nlink, ip->i_nlink); 733 ip->i_flag |= IN_CHANGE; 734 if (DOINGSOFTDEP(vp)) 735 softdep_change_linkcnt(ip); 736 } 737 PNBUF_PUT(cnp->cn_pnbuf); 738 out1: 739 if (dvp != vp) 740 VOP_UNLOCK(vp, 0); 741 out2: 742 VN_KNOTE(vp, NOTE_LINK); 743 VN_KNOTE(dvp, NOTE_WRITE); 744 vput(dvp); 745 return (error); 746 } 747 748 /* 749 * whiteout vnode call 750 */ 751 int 752 ufs_whiteout(void *v) 753 { 754 struct vop_whiteout_args /* { 755 struct vnode *a_dvp; 756 struct componentname *a_cnp; 757 int a_flags; 758 } */ *ap = v; 759 struct vnode *dvp = ap->a_dvp; 760 struct componentname *cnp = ap->a_cnp; 761 struct direct *newdir; 762 int error; 763 struct ufsmount *ump = VFSTOUFS(dvp->v_mount); 764 765 error = 0; 766 switch (ap->a_flags) { 767 case LOOKUP: 768 /* 4.4 format directories support whiteout operations */ 769 if (ump->um_maxsymlinklen > 0) 770 return (0); 771 return (EOPNOTSUPP); 772 773 case CREATE: 774 /* create a new directory whiteout */ 775 #ifdef DIAGNOSTIC 776 if ((cnp->cn_flags & SAVENAME) == 0) 777 panic("ufs_whiteout: missing name"); 778 if (ump->um_maxsymlinklen <= 0) 779 panic("ufs_whiteout: old format filesystem"); 780 #endif 781 782 newdir = pool_get(&ufs_direct_pool, PR_WAITOK); 783 newdir->d_ino = WINO; 784 newdir->d_namlen = cnp->cn_namelen; 785 memcpy(newdir->d_name, cnp->cn_nameptr, 786 (size_t)cnp->cn_namelen); 787 newdir->d_name[cnp->cn_namelen] = '\0'; 788 newdir->d_type = DT_WHT; 789 error = ufs_direnter(dvp, NULL, newdir, cnp, NULL); 790 pool_put(&ufs_direct_pool, newdir); 791 break; 792 793 case DELETE: 794 /* remove an existing directory whiteout */ 795 #ifdef DIAGNOSTIC 796 if (ump->um_maxsymlinklen <= 0) 797 panic("ufs_whiteout: old format filesystem"); 798 #endif 799 800 cnp->cn_flags &= ~DOWHITEOUT; 801 error = ufs_dirremove(dvp, NULL, cnp->cn_flags, 0); 802 break; 803 default: 804 panic("ufs_whiteout: unknown op"); 805 /* NOTREACHED */ 806 } 807 if (cnp->cn_flags & HASBUF) { 808 PNBUF_PUT(cnp->cn_pnbuf); 809 cnp->cn_flags &= ~HASBUF; 810 } 811 return (error); 812 } 813 814 815 /* 816 * Rename system call. 817 * rename("foo", "bar"); 818 * is essentially 819 * unlink("bar"); 820 * link("foo", "bar"); 821 * unlink("foo"); 822 * but ``atomically''. Can't do full commit without saving state in the 823 * inode on disk which isn't feasible at this time. Best we can do is 824 * always guarantee the target exists. 825 * 826 * Basic algorithm is: 827 * 828 * 1) Bump link count on source while we're linking it to the 829 * target. This also ensure the inode won't be deleted out 830 * from underneath us while we work (it may be truncated by 831 * a concurrent `trunc' or `open' for creation). 832 * 2) Link source to destination. If destination already exists, 833 * delete it first. 834 * 3) Unlink source reference to inode if still around. If a 835 * directory was moved and the parent of the destination 836 * is different from the source, patch the ".." entry in the 837 * directory. 838 */ 839 int 840 ufs_rename(void *v) 841 { 842 struct vop_rename_args /* { 843 struct vnode *a_fdvp; 844 struct vnode *a_fvp; 845 struct componentname *a_fcnp; 846 struct vnode *a_tdvp; 847 struct vnode *a_tvp; 848 struct componentname *a_tcnp; 849 } */ *ap = v; 850 struct vnode *tvp, *tdvp, *fvp, *fdvp; 851 struct componentname *tcnp, *fcnp; 852 struct inode *ip, *xp, *dp; 853 struct direct *newdir; 854 int doingdirectory, oldparent, newparent, error; 855 856 tvp = ap->a_tvp; 857 tdvp = ap->a_tdvp; 858 fvp = ap->a_fvp; 859 fdvp = ap->a_fdvp; 860 tcnp = ap->a_tcnp; 861 fcnp = ap->a_fcnp; 862 doingdirectory = oldparent = newparent = error = 0; 863 864 #ifdef DIAGNOSTIC 865 if ((tcnp->cn_flags & HASBUF) == 0 || 866 (fcnp->cn_flags & HASBUF) == 0) 867 panic("ufs_rename: no name"); 868 #endif 869 /* 870 * Check for cross-device rename. 871 */ 872 if ((fvp->v_mount != tdvp->v_mount) || 873 (tvp && (fvp->v_mount != tvp->v_mount))) { 874 error = EXDEV; 875 abortit: 876 VOP_ABORTOP(tdvp, tcnp); /* XXX, why not in NFS? */ 877 if (tdvp == tvp) 878 vrele(tdvp); 879 else 880 vput(tdvp); 881 if (tvp) 882 vput(tvp); 883 VOP_ABORTOP(fdvp, fcnp); /* XXX, why not in NFS? */ 884 vrele(fdvp); 885 vrele(fvp); 886 return (error); 887 } 888 889 /* 890 * Check if just deleting a link name. 891 */ 892 if (tvp && ((VTOI(tvp)->i_flags & (IMMUTABLE | APPEND)) || 893 (VTOI(tdvp)->i_flags & APPEND))) { 894 error = EPERM; 895 goto abortit; 896 } 897 if (fvp == tvp) { 898 if (fvp->v_type == VDIR) { 899 error = EINVAL; 900 goto abortit; 901 } 902 903 /* Release destination completely. */ 904 VOP_ABORTOP(tdvp, tcnp); 905 vput(tdvp); 906 vput(tvp); 907 908 /* Delete source. */ 909 vrele(fvp); 910 fcnp->cn_flags &= ~(MODMASK | SAVESTART); 911 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 912 fcnp->cn_nameiop = DELETE; 913 vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 914 if ((error = relookup(fdvp, &fvp, fcnp))) { 915 vput(fdvp); 916 return (error); 917 } 918 return (VOP_REMOVE(fdvp, fvp, fcnp)); 919 } 920 if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) 921 goto abortit; 922 dp = VTOI(fdvp); 923 ip = VTOI(fvp); 924 if ((nlink_t) ip->i_nlink >= LINK_MAX) { 925 VOP_UNLOCK(fvp, 0); 926 error = EMLINK; 927 goto abortit; 928 } 929 if ((ip->i_flags & (IMMUTABLE | APPEND)) || 930 (dp->i_flags & APPEND)) { 931 VOP_UNLOCK(fvp, 0); 932 error = EPERM; 933 goto abortit; 934 } 935 if ((ip->i_mode & IFMT) == IFDIR) { 936 /* 937 * Avoid ".", "..", and aliases of "." for obvious reasons. 938 */ 939 if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || 940 dp == ip || 941 (fcnp->cn_flags & ISDOTDOT) || 942 (tcnp->cn_flags & ISDOTDOT) || 943 (ip->i_flag & IN_RENAME)) { 944 VOP_UNLOCK(fvp, 0); 945 error = EINVAL; 946 goto abortit; 947 } 948 ip->i_flag |= IN_RENAME; 949 oldparent = dp->i_number; 950 doingdirectory = 1; 951 } 952 VN_KNOTE(fdvp, NOTE_WRITE); /* XXXLUKEM/XXX: right place? */ 953 954 /* 955 * When the target exists, both the directory 956 * and target vnodes are returned locked. 957 */ 958 dp = VTOI(tdvp); 959 xp = NULL; 960 if (tvp) 961 xp = VTOI(tvp); 962 963 /* 964 * 1) Bump link count while we're moving stuff 965 * around. If we crash somewhere before 966 * completing our work, the link count 967 * may be wrong, but correctable. 968 */ 969 ip->i_ffs_effnlink++; 970 ip->i_nlink++; 971 DIP_ASSIGN(ip, nlink, ip->i_nlink); 972 ip->i_flag |= IN_CHANGE; 973 if (DOINGSOFTDEP(fvp)) 974 softdep_change_linkcnt(ip); 975 if ((error = UFS_UPDATE(fvp, NULL, NULL, UPDATE_DIROP)) != 0) { 976 VOP_UNLOCK(fvp, 0); 977 goto bad; 978 } 979 980 /* 981 * If ".." must be changed (ie the directory gets a new 982 * parent) then the source directory must not be in the 983 * directory hierarchy above the target, as this would 984 * orphan everything below the source directory. Also 985 * the user must have write permission in the source so 986 * as to be able to change "..". We must repeat the call 987 * to namei, as the parent directory is unlocked by the 988 * call to checkpath(). 989 */ 990 error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_lwp); 991 VOP_UNLOCK(fvp, 0); 992 if (oldparent != dp->i_number) 993 newparent = dp->i_number; 994 if (doingdirectory && newparent) { 995 if (error) /* write access check above */ 996 goto bad; 997 if (xp != NULL) 998 vput(tvp); 999 vref(tdvp); /* compensate for the ref checkpath loses */ 1000 if ((error = ufs_checkpath(ip, dp, tcnp->cn_cred)) != 0) { 1001 vrele(tdvp); 1002 goto out; 1003 } 1004 tcnp->cn_flags &= ~SAVESTART; 1005 vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY); 1006 error = relookup(tdvp, &tvp, tcnp); 1007 if (error != 0) { 1008 vput(tdvp); 1009 goto out; 1010 } 1011 dp = VTOI(tdvp); 1012 xp = NULL; 1013 if (tvp) 1014 xp = VTOI(tvp); 1015 } 1016 /* 1017 * 2) If target doesn't exist, link the target 1018 * to the source and unlink the source. 1019 * Otherwise, rewrite the target directory 1020 * entry to reference the source inode and 1021 * expunge the original entry's existence. 1022 */ 1023 if (xp == NULL) { 1024 if (dp->i_dev != ip->i_dev) 1025 panic("rename: EXDEV"); 1026 /* 1027 * Account for ".." in new directory. 1028 * When source and destination have the same 1029 * parent we don't fool with the link count. 1030 */ 1031 if (doingdirectory && newparent) { 1032 if ((nlink_t)dp->i_nlink >= LINK_MAX) { 1033 error = EMLINK; 1034 goto bad; 1035 } 1036 dp->i_ffs_effnlink++; 1037 dp->i_nlink++; 1038 DIP_ASSIGN(dp, nlink, dp->i_nlink); 1039 dp->i_flag |= IN_CHANGE; 1040 if (DOINGSOFTDEP(tdvp)) 1041 softdep_change_linkcnt(dp); 1042 if ((error = UFS_UPDATE(tdvp, NULL, NULL, 1043 UPDATE_DIROP)) != 0) { 1044 dp->i_ffs_effnlink--; 1045 dp->i_nlink--; 1046 DIP_ASSIGN(dp, nlink, dp->i_nlink); 1047 dp->i_flag |= IN_CHANGE; 1048 if (DOINGSOFTDEP(tdvp)) 1049 softdep_change_linkcnt(dp); 1050 goto bad; 1051 } 1052 } 1053 newdir = pool_get(&ufs_direct_pool, PR_WAITOK); 1054 ufs_makedirentry(ip, tcnp, newdir); 1055 error = ufs_direnter(tdvp, NULL, newdir, tcnp, NULL); 1056 pool_put(&ufs_direct_pool, newdir); 1057 if (error != 0) { 1058 if (doingdirectory && newparent) { 1059 dp->i_ffs_effnlink--; 1060 dp->i_nlink--; 1061 DIP_ASSIGN(dp, nlink, dp->i_nlink); 1062 dp->i_flag |= IN_CHANGE; 1063 if (DOINGSOFTDEP(tdvp)) 1064 softdep_change_linkcnt(dp); 1065 (void)UFS_UPDATE(tdvp, NULL, NULL, 1066 UPDATE_WAIT|UPDATE_DIROP); 1067 } 1068 goto bad; 1069 } 1070 VN_KNOTE(tdvp, NOTE_WRITE); 1071 vput(tdvp); 1072 } else { 1073 if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev) 1074 panic("rename: EXDEV"); 1075 /* 1076 * Short circuit rename(foo, foo). 1077 */ 1078 if (xp->i_number == ip->i_number) 1079 panic("rename: same file"); 1080 /* 1081 * If the parent directory is "sticky", then the user must 1082 * own the parent directory, or the destination of the rename, 1083 * otherwise the destination may not be changed (except by 1084 * root). This implements append-only directories. 1085 */ 1086 if ((dp->i_mode & S_ISTXT) && kauth_cred_geteuid(tcnp->cn_cred) != 0 && 1087 kauth_cred_geteuid(tcnp->cn_cred) != dp->i_uid && 1088 xp->i_uid != kauth_cred_geteuid(tcnp->cn_cred)) { 1089 error = EPERM; 1090 goto bad; 1091 } 1092 /* 1093 * Target must be empty if a directory and have no links 1094 * to it. Also, ensure source and target are compatible 1095 * (both directories, or both not directories). 1096 */ 1097 if ((xp->i_mode & IFMT) == IFDIR) { 1098 if (xp->i_ffs_effnlink > 2 || 1099 !ufs_dirempty(xp, dp->i_number, tcnp->cn_cred)) { 1100 error = ENOTEMPTY; 1101 goto bad; 1102 } 1103 if (!doingdirectory) { 1104 error = ENOTDIR; 1105 goto bad; 1106 } 1107 cache_purge(tdvp); 1108 } else if (doingdirectory) { 1109 error = EISDIR; 1110 goto bad; 1111 } 1112 if ((error = ufs_dirrewrite(dp, xp, ip->i_number, 1113 IFTODT(ip->i_mode), doingdirectory && newparent ? 1114 newparent : doingdirectory, IN_CHANGE | IN_UPDATE)) != 0) 1115 goto bad; 1116 if (doingdirectory) { 1117 if (!newparent) { 1118 dp->i_ffs_effnlink--; 1119 if (DOINGSOFTDEP(tdvp)) 1120 softdep_change_linkcnt(dp); 1121 } 1122 xp->i_ffs_effnlink--; 1123 if (DOINGSOFTDEP(tvp)) 1124 softdep_change_linkcnt(xp); 1125 } 1126 if (doingdirectory && !DOINGSOFTDEP(tvp)) { 1127 /* 1128 * Truncate inode. The only stuff left in the directory 1129 * is "." and "..". The "." reference is inconsequential 1130 * since we are quashing it. We have removed the "." 1131 * reference and the reference in the parent directory, 1132 * but there may be other hard links. The soft 1133 * dependency code will arrange to do these operations 1134 * after the parent directory entry has been deleted on 1135 * disk, so when running with that code we avoid doing 1136 * them now. 1137 */ 1138 if (!newparent) { 1139 dp->i_nlink--; 1140 DIP_ASSIGN(dp, nlink, dp->i_nlink); 1141 dp->i_flag |= IN_CHANGE; 1142 } 1143 xp->i_nlink--; 1144 DIP_ASSIGN(xp, nlink, xp->i_nlink); 1145 xp->i_flag |= IN_CHANGE; 1146 if ((error = UFS_TRUNCATE(tvp, (off_t)0, IO_SYNC, 1147 tcnp->cn_cred, tcnp->cn_lwp))) 1148 goto bad; 1149 } 1150 VN_KNOTE(tdvp, NOTE_WRITE); 1151 vput(tdvp); 1152 VN_KNOTE(tvp, NOTE_DELETE); 1153 vput(tvp); 1154 xp = NULL; 1155 } 1156 1157 /* 1158 * 3) Unlink the source. 1159 */ 1160 fcnp->cn_flags &= ~(MODMASK | SAVESTART); 1161 fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; 1162 vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY); 1163 if ((error = relookup(fdvp, &fvp, fcnp))) { 1164 vput(fdvp); 1165 vrele(ap->a_fvp); 1166 return (error); 1167 } 1168 if (fvp != NULL) { 1169 xp = VTOI(fvp); 1170 dp = VTOI(fdvp); 1171 } else { 1172 /* 1173 * From name has disappeared. 1174 */ 1175 if (doingdirectory) 1176 panic("rename: lost dir entry"); 1177 vrele(ap->a_fvp); 1178 return (0); 1179 } 1180 /* 1181 * Ensure that the directory entry still exists and has not 1182 * changed while the new name has been entered. If the source is 1183 * a file then the entry may have been unlinked or renamed. In 1184 * either case there is no further work to be done. If the source 1185 * is a directory then it cannot have been rmdir'ed; The IRENAME 1186 * flag ensures that it cannot be moved by another rename or removed 1187 * by a rmdir. 1188 */ 1189 if (xp != ip) { 1190 if (doingdirectory) 1191 panic("rename: lost dir entry"); 1192 } else { 1193 /* 1194 * If the source is a directory with a 1195 * new parent, the link count of the old 1196 * parent directory must be decremented 1197 * and ".." set to point to the new parent. 1198 */ 1199 if (doingdirectory && newparent) { 1200 KASSERT(dp != NULL); 1201 xp->i_offset = mastertemplate.dot_reclen; 1202 ufs_dirrewrite(xp, dp, newparent, DT_DIR, 0, IN_CHANGE); 1203 cache_purge(fdvp); 1204 } 1205 error = ufs_dirremove(fdvp, xp, fcnp->cn_flags, 0); 1206 xp->i_flag &= ~IN_RENAME; 1207 } 1208 VN_KNOTE(fvp, NOTE_RENAME); 1209 if (dp) 1210 vput(fdvp); 1211 if (xp) 1212 vput(fvp); 1213 vrele(ap->a_fvp); 1214 return (error); 1215 1216 /* exit routines from steps 1 & 2 */ 1217 bad: 1218 if (xp) 1219 vput(ITOV(xp)); 1220 vput(ITOV(dp)); 1221 out: 1222 if (doingdirectory) 1223 ip->i_flag &= ~IN_RENAME; 1224 if (vn_lock(fvp, LK_EXCLUSIVE) == 0) { 1225 ip->i_ffs_effnlink--; 1226 ip->i_nlink--; 1227 DIP_ASSIGN(ip, nlink, ip->i_nlink); 1228 ip->i_flag |= IN_CHANGE; 1229 ip->i_flag &= ~IN_RENAME; 1230 if (DOINGSOFTDEP(fvp)) 1231 softdep_change_linkcnt(ip); 1232 vput(fvp); 1233 } else 1234 vrele(fvp); 1235 vrele(fdvp); 1236 return (error); 1237 } 1238 1239 /* 1240 * Mkdir system call 1241 */ 1242 int 1243 ufs_mkdir(void *v) 1244 { 1245 struct vop_mkdir_args /* { 1246 struct vnode *a_dvp; 1247 struct vnode **a_vpp; 1248 struct componentname *a_cnp; 1249 struct vattr *a_vap; 1250 } */ *ap = v; 1251 struct vnode *dvp = ap->a_dvp, *tvp; 1252 struct vattr *vap = ap->a_vap; 1253 struct componentname *cnp = ap->a_cnp; 1254 struct inode *ip, *dp = VTOI(dvp); 1255 struct buf *bp; 1256 struct dirtemplate dirtemplate; 1257 struct direct *newdir; 1258 int error, dmode, blkoff; 1259 struct ufsmount *ump = dp->i_ump; 1260 int dirblksiz = ump->um_dirblksiz; 1261 1262 #ifdef DIAGNOSTIC 1263 if ((cnp->cn_flags & HASBUF) == 0) 1264 panic("ufs_mkdir: no name"); 1265 #endif 1266 if ((nlink_t)dp->i_nlink >= LINK_MAX) { 1267 error = EMLINK; 1268 goto out; 1269 } 1270 dmode = vap->va_mode & ACCESSPERMS; 1271 dmode |= IFDIR; 1272 /* 1273 * Must simulate part of ufs_makeinode here to acquire the inode, 1274 * but not have it entered in the parent directory. The entry is 1275 * made later after writing "." and ".." entries. 1276 */ 1277 if ((error = UFS_VALLOC(dvp, dmode, cnp->cn_cred, ap->a_vpp)) != 0) 1278 goto out; 1279 tvp = *ap->a_vpp; 1280 ip = VTOI(tvp); 1281 ip->i_uid = kauth_cred_geteuid(cnp->cn_cred); 1282 DIP_ASSIGN(ip, uid, ip->i_uid); 1283 ip->i_gid = dp->i_gid; 1284 DIP_ASSIGN(ip, gid, ip->i_gid); 1285 #ifdef QUOTA 1286 if ((error = getinoquota(ip)) || 1287 (error = chkiq(ip, 1, cnp->cn_cred, 0))) { 1288 PNBUF_PUT(cnp->cn_pnbuf); 1289 UFS_VFREE(tvp, ip->i_number, dmode); 1290 vput(tvp); 1291 vput(dvp); 1292 return (error); 1293 } 1294 #endif 1295 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 1296 ip->i_mode = dmode; 1297 DIP_ASSIGN(ip, mode, dmode); 1298 tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */ 1299 ip->i_ffs_effnlink = 2; 1300 ip->i_nlink = 2; 1301 DIP_ASSIGN(ip, nlink, 2); 1302 if (DOINGSOFTDEP(tvp)) 1303 softdep_change_linkcnt(ip); 1304 if (cnp->cn_flags & ISWHITEOUT) { 1305 ip->i_flags |= UF_OPAQUE; 1306 DIP_ASSIGN(ip, flags, ip->i_flags); 1307 } 1308 1309 /* 1310 * Bump link count in parent directory to reflect work done below. 1311 * Should be done before reference is created so cleanup is 1312 * possible if we crash. 1313 */ 1314 dp->i_ffs_effnlink++; 1315 dp->i_nlink++; 1316 DIP_ASSIGN(dp, nlink, dp->i_nlink); 1317 dp->i_flag |= IN_CHANGE; 1318 if (DOINGSOFTDEP(dvp)) 1319 softdep_change_linkcnt(dp); 1320 if ((error = UFS_UPDATE(dvp, NULL, NULL, UPDATE_DIROP)) != 0) 1321 goto bad; 1322 1323 /* 1324 * Initialize directory with "." and ".." from static template. 1325 */ 1326 dirtemplate = mastertemplate; 1327 dirtemplate.dotdot_reclen = dirblksiz - dirtemplate.dot_reclen; 1328 dirtemplate.dot_ino = ufs_rw32(ip->i_number, UFS_MPNEEDSWAP(ump)); 1329 dirtemplate.dotdot_ino = ufs_rw32(dp->i_number, UFS_MPNEEDSWAP(ump)); 1330 dirtemplate.dot_reclen = ufs_rw16(dirtemplate.dot_reclen, 1331 UFS_MPNEEDSWAP(ump)); 1332 dirtemplate.dotdot_reclen = ufs_rw16(dirtemplate.dotdot_reclen, 1333 UFS_MPNEEDSWAP(ump)); 1334 if (ump->um_maxsymlinklen <= 0) { 1335 #if BYTE_ORDER == LITTLE_ENDIAN 1336 if (UFS_MPNEEDSWAP(ump) == 0) 1337 #else 1338 if (UFS_MPNEEDSWAP(ump) != 0) 1339 #endif 1340 { 1341 dirtemplate.dot_type = dirtemplate.dot_namlen; 1342 dirtemplate.dotdot_type = dirtemplate.dotdot_namlen; 1343 dirtemplate.dot_namlen = dirtemplate.dotdot_namlen = 0; 1344 } else 1345 dirtemplate.dot_type = dirtemplate.dotdot_type = 0; 1346 } 1347 if ((error = UFS_BALLOC(tvp, (off_t)0, dirblksiz, cnp->cn_cred, 1348 B_CLRBUF, &bp)) != 0) 1349 goto bad; 1350 ip->i_size = dirblksiz; 1351 DIP_ASSIGN(ip, size, dirblksiz); 1352 ip->i_flag |= IN_CHANGE | IN_UPDATE; 1353 uvm_vnp_setsize(tvp, ip->i_size); 1354 memcpy((caddr_t)bp->b_data, (caddr_t)&dirtemplate, sizeof dirtemplate); 1355 if (DOINGSOFTDEP(tvp)) { 1356 /* 1357 * Ensure that the entire newly allocated block is a 1358 * valid directory so that future growth within the 1359 * block does not have to ensure that the block is 1360 * written before the inode. 1361 */ 1362 blkoff = dirblksiz; 1363 while (blkoff < bp->b_bcount) { 1364 ((struct direct *) 1365 (bp->b_data + blkoff))->d_reclen = dirblksiz; 1366 blkoff += dirblksiz; 1367 } 1368 } 1369 /* 1370 * Directory set up, now install it's entry in the parent directory. 1371 * 1372 * If we are not doing soft dependencies, then we must write out the 1373 * buffer containing the new directory body before entering the new 1374 * name in the parent. If we are doing soft dependencies, then the 1375 * buffer containing the new directory body will be passed to and 1376 * released in the soft dependency code after the code has attached 1377 * an appropriate ordering dependency to the buffer which ensures that 1378 * the buffer is written before the new name is written in the parent. 1379 */ 1380 if (!DOINGSOFTDEP(tvp) && ((error = VOP_BWRITE(bp)) != 0)) 1381 goto bad; 1382 if ((error = UFS_UPDATE(tvp, NULL, NULL, UPDATE_DIROP)) != 0) { 1383 if (DOINGSOFTDEP(tvp)) 1384 (void)VOP_BWRITE(bp); 1385 goto bad; 1386 } 1387 newdir = pool_get(&ufs_direct_pool, PR_WAITOK); 1388 ufs_makedirentry(ip, cnp, newdir); 1389 error = ufs_direnter(dvp, tvp, newdir, cnp, bp); 1390 pool_put(&ufs_direct_pool, newdir); 1391 bad: 1392 if (error == 0) { 1393 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 1394 } else { 1395 dp->i_ffs_effnlink--; 1396 dp->i_nlink--; 1397 DIP_ASSIGN(dp, nlink, dp->i_nlink); 1398 dp->i_flag |= IN_CHANGE; 1399 if (DOINGSOFTDEP(dvp)) 1400 softdep_change_linkcnt(dp); 1401 /* 1402 * No need to do an explicit UFS_TRUNCATE here, vrele will 1403 * do this for us because we set the link count to 0. 1404 */ 1405 ip->i_ffs_effnlink = 0; 1406 ip->i_nlink = 0; 1407 DIP_ASSIGN(ip, nlink, 0); 1408 ip->i_flag |= IN_CHANGE; 1409 #ifdef LFS 1410 /* If IN_ADIROP, account for it */ 1411 lfs_unmark_vnode(tvp); 1412 #endif 1413 if (DOINGSOFTDEP(tvp)) 1414 softdep_change_linkcnt(ip); 1415 vput(tvp); 1416 } 1417 out: 1418 PNBUF_PUT(cnp->cn_pnbuf); 1419 vput(dvp); 1420 return (error); 1421 } 1422 1423 /* 1424 * Rmdir system call. 1425 */ 1426 int 1427 ufs_rmdir(void *v) 1428 { 1429 struct vop_rmdir_args /* { 1430 struct vnode *a_dvp; 1431 struct vnode *a_vp; 1432 struct componentname *a_cnp; 1433 } */ *ap = v; 1434 struct vnode *vp, *dvp; 1435 struct componentname *cnp; 1436 struct inode *ip, *dp; 1437 int error; 1438 1439 vp = ap->a_vp; 1440 dvp = ap->a_dvp; 1441 cnp = ap->a_cnp; 1442 ip = VTOI(vp); 1443 dp = VTOI(dvp); 1444 /* 1445 * No rmdir "." or of mounted directories please. 1446 */ 1447 if (dp == ip || vp->v_mountedhere != NULL) { 1448 if (dp == ip) 1449 vrele(vp); 1450 else 1451 vput(vp); 1452 vput(vp); 1453 return (EINVAL); 1454 } 1455 /* 1456 * Do not remove a directory that is in the process of being renamed. 1457 * Verify that the directory is empty (and valid). (Rmdir ".." won't 1458 * be valid since ".." will contain a reference to the current 1459 * directory and thus be non-empty.) 1460 */ 1461 error = 0; 1462 if (ip->i_flag & IN_RENAME) { 1463 error = EINVAL; 1464 goto out; 1465 } 1466 if (ip->i_ffs_effnlink != 2 || 1467 !ufs_dirempty(ip, dp->i_number, cnp->cn_cred)) { 1468 error = ENOTEMPTY; 1469 goto out; 1470 } 1471 if ((dp->i_flags & APPEND) || 1472 (ip->i_flags & (IMMUTABLE | APPEND))) { 1473 error = EPERM; 1474 goto out; 1475 } 1476 /* 1477 * Delete reference to directory before purging 1478 * inode. If we crash in between, the directory 1479 * will be reattached to lost+found, 1480 */ 1481 if (DOINGSOFTDEP(vp)) { 1482 dp->i_ffs_effnlink--; 1483 ip->i_ffs_effnlink--; 1484 softdep_change_linkcnt(dp); 1485 softdep_change_linkcnt(ip); 1486 } 1487 error = ufs_dirremove(dvp, ip, cnp->cn_flags, 1); 1488 if (error) { 1489 if (DOINGSOFTDEP(vp)) { 1490 dp->i_ffs_effnlink++; 1491 ip->i_ffs_effnlink++; 1492 softdep_change_linkcnt(dp); 1493 softdep_change_linkcnt(ip); 1494 } 1495 goto out; 1496 } 1497 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 1498 cache_purge(dvp); 1499 /* 1500 * Truncate inode. The only stuff left in the directory is "." and 1501 * "..". The "." reference is inconsequential since we're quashing 1502 * it. The soft dependency code will arrange to do these operations 1503 * after the parent directory entry has been deleted on disk, so 1504 * when running with that code we avoid doing them now. 1505 */ 1506 if (!DOINGSOFTDEP(vp)) { 1507 dp->i_nlink--; 1508 dp->i_ffs_effnlink--; 1509 DIP_ASSIGN(dp, nlink, dp->i_nlink); 1510 dp->i_flag |= IN_CHANGE; 1511 ip->i_nlink--; 1512 ip->i_ffs_effnlink--; 1513 DIP_ASSIGN(ip, nlink, ip->i_nlink); 1514 ip->i_flag |= IN_CHANGE; 1515 error = UFS_TRUNCATE(vp, (off_t)0, IO_SYNC, cnp->cn_cred, 1516 cnp->cn_lwp); 1517 } 1518 cache_purge(vp); 1519 #ifdef UFS_DIRHASH 1520 if (ip->i_dirhash != NULL) 1521 ufsdirhash_free(ip); 1522 #endif 1523 out: 1524 VN_KNOTE(vp, NOTE_DELETE); 1525 vput(dvp); 1526 vput(vp); 1527 return (error); 1528 } 1529 1530 /* 1531 * symlink -- make a symbolic link 1532 */ 1533 int 1534 ufs_symlink(void *v) 1535 { 1536 struct vop_symlink_args /* { 1537 struct vnode *a_dvp; 1538 struct vnode **a_vpp; 1539 struct componentname *a_cnp; 1540 struct vattr *a_vap; 1541 char *a_target; 1542 } */ *ap = v; 1543 struct vnode *vp, **vpp; 1544 struct inode *ip; 1545 int len, error; 1546 1547 vpp = ap->a_vpp; 1548 error = ufs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp, 1549 vpp, ap->a_cnp); 1550 if (error) 1551 return (error); 1552 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1553 vp = *vpp; 1554 len = strlen(ap->a_target); 1555 ip = VTOI(vp); 1556 if (len < ip->i_ump->um_maxsymlinklen) { 1557 memcpy((char *)SHORTLINK(ip), ap->a_target, len); 1558 ip->i_size = len; 1559 DIP_ASSIGN(ip, size, len); 1560 uvm_vnp_setsize(vp, ip->i_size); 1561 ip->i_flag |= IN_CHANGE | IN_UPDATE; 1562 } else 1563 error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0, 1564 UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred, NULL, 1565 NULL); 1566 if (error) 1567 vput(vp); 1568 return (error); 1569 } 1570 1571 /* 1572 * Vnode op for reading directories. 1573 * 1574 * This routine handles converting from the on-disk directory format 1575 * "struct direct" to the in-memory format "struct dirent" as well as 1576 * byte swapping the entries if necessary. 1577 */ 1578 int 1579 ufs_readdir(void *v) 1580 { 1581 struct vop_readdir_args /* { 1582 struct vnode *a_vp; 1583 struct uio *a_uio; 1584 kauth_cred_t a_cred; 1585 int *a_eofflag; 1586 off_t **a_cookies; 1587 int *ncookies; 1588 } */ *ap = v; 1589 struct vnode *vp = ap->a_vp; 1590 struct direct *cdp, *ecdp; 1591 struct dirent *ndp; 1592 char *cdbuf, *ndbuf, *endp; 1593 struct uio auio, *uio; 1594 struct iovec aiov; 1595 int error; 1596 size_t count, ccount, rcount; 1597 off_t off, *ccp; 1598 off_t startoff; 1599 size_t skipbytes; 1600 struct ufsmount *ump = VFSTOUFS(vp->v_mount); 1601 int nswap = UFS_MPNEEDSWAP(ump); 1602 #if BYTE_ORDER == LITTLE_ENDIAN 1603 int needswap = ump->um_maxsymlinklen <= 0 && nswap == 0; 1604 #else 1605 int needswap = ump->um_maxsymlinklen <= 0 && nswap != 0; 1606 #endif 1607 uio = ap->a_uio; 1608 count = uio->uio_resid; 1609 rcount = count - ((uio->uio_offset + count) & (ump->um_dirblksiz - 1)); 1610 1611 if (rcount < _DIRENT_MINSIZE(cdp) || count < _DIRENT_MINSIZE(ndp)) 1612 return EINVAL; 1613 1614 startoff = uio->uio_offset & ~(ump->um_dirblksiz - 1); 1615 skipbytes = uio->uio_offset - startoff; 1616 rcount += skipbytes; 1617 1618 auio.uio_iov = &aiov; 1619 auio.uio_iovcnt = 1; 1620 auio.uio_offset = startoff; 1621 auio.uio_resid = rcount; 1622 UIO_SETUP_SYSSPACE(&auio); 1623 auio.uio_rw = UIO_READ; 1624 cdbuf = malloc(rcount, M_TEMP, M_WAITOK); 1625 aiov.iov_base = cdbuf; 1626 aiov.iov_len = rcount; 1627 error = VOP_READ(vp, &auio, 0, ap->a_cred); 1628 if (error != 0) { 1629 free(cdbuf, M_TEMP); 1630 return error; 1631 } 1632 1633 rcount -= auio.uio_resid; 1634 1635 cdp = (struct direct *)(void *)cdbuf; 1636 ecdp = (struct direct *)(void *)&cdbuf[rcount]; 1637 1638 ndbuf = malloc(count, M_TEMP, M_WAITOK); 1639 ndp = (struct dirent *)(void *)ndbuf; 1640 endp = &ndbuf[count]; 1641 1642 off = uio->uio_offset; 1643 if (ap->a_cookies) { 1644 ccount = rcount / _DIRENT_RECLEN(cdp, 1); 1645 ccp = *(ap->a_cookies) = malloc(ccount * sizeof(*ccp), 1646 M_TEMP, M_WAITOK); 1647 } else { 1648 /* XXX: GCC */ 1649 ccount = 0; 1650 ccp = NULL; 1651 } 1652 1653 while (cdp < ecdp) { 1654 cdp->d_reclen = ufs_rw16(cdp->d_reclen, nswap); 1655 if (skipbytes > 0) { 1656 if (cdp->d_reclen <= skipbytes) { 1657 skipbytes -= cdp->d_reclen; 1658 cdp = _DIRENT_NEXT(cdp); 1659 continue; 1660 } 1661 /* 1662 * invlid cookie. 1663 */ 1664 error = EINVAL; 1665 goto out; 1666 } 1667 if (cdp->d_reclen == 0) { 1668 struct dirent *ondp = ndp; 1669 ndp->d_reclen = _DIRENT_MINSIZE(ndp); 1670 ndp = _DIRENT_NEXT(ndp); 1671 ondp->d_reclen = 0; 1672 cdp = ecdp; 1673 break; 1674 } 1675 if (needswap) { 1676 ndp->d_type = cdp->d_namlen; 1677 ndp->d_namlen = cdp->d_type; 1678 } else { 1679 ndp->d_type = cdp->d_type; 1680 ndp->d_namlen = cdp->d_namlen; 1681 } 1682 ndp->d_reclen = _DIRENT_RECLEN(ndp, ndp->d_namlen); 1683 if ((char *)(void *)ndp + ndp->d_reclen + 1684 _DIRENT_MINSIZE(ndp) > endp) 1685 break; 1686 ndp->d_fileno = ufs_rw32(cdp->d_ino, nswap); 1687 (void)memcpy(ndp->d_name, cdp->d_name, ndp->d_namlen); 1688 memset(&ndp->d_name[ndp->d_namlen], 0, 1689 ndp->d_reclen - _DIRENT_NAMEOFF(ndp) - ndp->d_namlen); 1690 off += cdp->d_reclen; 1691 if (ap->a_cookies) { 1692 KASSERT(ccp - *(ap->a_cookies) < ccount); 1693 *(ccp++) = off; 1694 } 1695 ndp = _DIRENT_NEXT(ndp); 1696 cdp = _DIRENT_NEXT(cdp); 1697 } 1698 1699 count = ((char *)(void *)ndp - ndbuf); 1700 error = uiomove(ndbuf, count, uio); 1701 out: 1702 if (ap->a_cookies) { 1703 if (error) { 1704 free(*(ap->a_cookies), M_TEMP); 1705 *(ap->a_cookies) = NULL; 1706 *(ap->a_ncookies) = 0; 1707 } else { 1708 *ap->a_ncookies = ccp - *(ap->a_cookies); 1709 } 1710 } 1711 uio->uio_offset = off; 1712 free(ndbuf, M_TEMP); 1713 free(cdbuf, M_TEMP); 1714 *ap->a_eofflag = VTOI(vp)->i_size <= uio->uio_offset; 1715 return error; 1716 } 1717 1718 /* 1719 * Return target name of a symbolic link 1720 */ 1721 int 1722 ufs_readlink(void *v) 1723 { 1724 struct vop_readlink_args /* { 1725 struct vnode *a_vp; 1726 struct uio *a_uio; 1727 kauth_cred_t a_cred; 1728 } */ *ap = v; 1729 struct vnode *vp = ap->a_vp; 1730 struct inode *ip = VTOI(vp); 1731 struct ufsmount *ump = VFSTOUFS(vp->v_mount); 1732 int isize; 1733 1734 isize = ip->i_size; 1735 if (isize < ump->um_maxsymlinklen || 1736 (ump->um_maxsymlinklen == 0 && DIP(ip, blocks) == 0)) { 1737 uiomove((char *)SHORTLINK(ip), isize, ap->a_uio); 1738 return (0); 1739 } 1740 return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred)); 1741 } 1742 1743 /* 1744 * Calculate the logical to physical mapping if not done already, 1745 * then call the device strategy routine. 1746 */ 1747 int 1748 ufs_strategy(void *v) 1749 { 1750 struct vop_strategy_args /* { 1751 struct vnode *a_vp; 1752 struct buf *a_bp; 1753 } */ *ap = v; 1754 struct buf *bp; 1755 struct vnode *vp; 1756 struct inode *ip; 1757 int error; 1758 1759 bp = ap->a_bp; 1760 vp = ap->a_vp; 1761 ip = VTOI(vp); 1762 if (vp->v_type == VBLK || vp->v_type == VCHR) 1763 panic("ufs_strategy: spec"); 1764 KASSERT(bp->b_bcount != 0); 1765 if (bp->b_blkno == bp->b_lblkno) { 1766 error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, 1767 NULL); 1768 if (error) { 1769 bp->b_error = error; 1770 bp->b_flags |= B_ERROR; 1771 biodone(bp); 1772 return (error); 1773 } 1774 if (bp->b_blkno == -1) /* no valid data */ 1775 clrbuf(bp); 1776 } 1777 if (bp->b_blkno < 0) { /* block is not on disk */ 1778 biodone(bp); 1779 return (0); 1780 } 1781 vp = ip->i_devvp; 1782 return (VOP_STRATEGY(vp, bp)); 1783 } 1784 1785 /* 1786 * Print out the contents of an inode. 1787 */ 1788 int 1789 ufs_print(void *v) 1790 { 1791 struct vop_print_args /* { 1792 struct vnode *a_vp; 1793 } */ *ap = v; 1794 struct vnode *vp; 1795 struct inode *ip; 1796 1797 vp = ap->a_vp; 1798 ip = VTOI(vp); 1799 printf("tag VT_UFS, ino %llu, on dev %d, %d", 1800 (unsigned long long)ip->i_number, 1801 major(ip->i_dev), minor(ip->i_dev)); 1802 printf(" flags 0x%x, effnlink %d, nlink %d\n", 1803 ip->i_flag, ip->i_ffs_effnlink, ip->i_nlink); 1804 printf("\tmode 0%o, owner %d, group %d, size %qd", 1805 ip->i_mode, ip->i_uid, ip->i_gid, 1806 (long long)ip->i_size); 1807 if (vp->v_type == VFIFO) 1808 fifo_printinfo(vp); 1809 lockmgr_printinfo(&vp->v_lock); 1810 printf("\n"); 1811 return (0); 1812 } 1813 1814 /* 1815 * Read wrapper for special devices. 1816 */ 1817 int 1818 ufsspec_read(void *v) 1819 { 1820 struct vop_read_args /* { 1821 struct vnode *a_vp; 1822 struct uio *a_uio; 1823 int a_ioflag; 1824 kauth_cred_t a_cred; 1825 } */ *ap = v; 1826 1827 /* 1828 * Set access flag. 1829 */ 1830 if ((ap->a_vp->v_mount->mnt_flag & MNT_NODEVMTIME) == 0) 1831 VTOI(ap->a_vp)->i_flag |= IN_ACCESS; 1832 return (VOCALL (spec_vnodeop_p, VOFFSET(vop_read), ap)); 1833 } 1834 1835 /* 1836 * Write wrapper for special devices. 1837 */ 1838 int 1839 ufsspec_write(void *v) 1840 { 1841 struct vop_write_args /* { 1842 struct vnode *a_vp; 1843 struct uio *a_uio; 1844 int a_ioflag; 1845 kauth_cred_t a_cred; 1846 } */ *ap = v; 1847 1848 /* 1849 * Set update and change flags. 1850 */ 1851 if ((ap->a_vp->v_mount->mnt_flag & MNT_NODEVMTIME) == 0) 1852 VTOI(ap->a_vp)->i_flag |= IN_MODIFY; 1853 return (VOCALL (spec_vnodeop_p, VOFFSET(vop_write), ap)); 1854 } 1855 1856 /* 1857 * Close wrapper for special devices. 1858 * 1859 * Update the times on the inode then do device close. 1860 */ 1861 int 1862 ufsspec_close(void *v) 1863 { 1864 struct vop_close_args /* { 1865 struct vnode *a_vp; 1866 int a_fflag; 1867 kauth_cred_t a_cred; 1868 struct lwp *a_l; 1869 } */ *ap = v; 1870 struct vnode *vp; 1871 struct inode *ip; 1872 1873 vp = ap->a_vp; 1874 ip = VTOI(vp); 1875 simple_lock(&vp->v_interlock); 1876 if (vp->v_usecount > 1) 1877 UFS_ITIMES(vp, NULL, NULL, NULL); 1878 simple_unlock(&vp->v_interlock); 1879 return (VOCALL (spec_vnodeop_p, VOFFSET(vop_close), ap)); 1880 } 1881 1882 /* 1883 * Read wrapper for fifo's 1884 */ 1885 int 1886 ufsfifo_read(void *v) 1887 { 1888 struct vop_read_args /* { 1889 struct vnode *a_vp; 1890 struct uio *a_uio; 1891 int a_ioflag; 1892 kauth_cred_t a_cred; 1893 } */ *ap = v; 1894 1895 /* 1896 * Set access flag. 1897 */ 1898 VTOI(ap->a_vp)->i_flag |= IN_ACCESS; 1899 return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_read), ap)); 1900 } 1901 1902 /* 1903 * Write wrapper for fifo's. 1904 */ 1905 int 1906 ufsfifo_write(void *v) 1907 { 1908 struct vop_write_args /* { 1909 struct vnode *a_vp; 1910 struct uio *a_uio; 1911 int a_ioflag; 1912 kauth_cred_t a_cred; 1913 } */ *ap = v; 1914 1915 /* 1916 * Set update and change flags. 1917 */ 1918 VTOI(ap->a_vp)->i_flag |= IN_MODIFY; 1919 return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_write), ap)); 1920 } 1921 1922 /* 1923 * Close wrapper for fifo's. 1924 * 1925 * Update the times on the inode then do device close. 1926 */ 1927 int 1928 ufsfifo_close(void *v) 1929 { 1930 struct vop_close_args /* { 1931 struct vnode *a_vp; 1932 int a_fflag; 1933 kauth_cred_t a_cred; 1934 struct lwp *a_l; 1935 } */ *ap = v; 1936 struct vnode *vp; 1937 struct inode *ip; 1938 1939 vp = ap->a_vp; 1940 ip = VTOI(vp); 1941 simple_lock(&vp->v_interlock); 1942 if (ap->a_vp->v_usecount > 1) 1943 UFS_ITIMES(vp, NULL, NULL, NULL); 1944 simple_unlock(&vp->v_interlock); 1945 return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_close), ap)); 1946 } 1947 1948 /* 1949 * Return POSIX pathconf information applicable to ufs filesystems. 1950 */ 1951 int 1952 ufs_pathconf(void *v) 1953 { 1954 struct vop_pathconf_args /* { 1955 struct vnode *a_vp; 1956 int a_name; 1957 register_t *a_retval; 1958 } */ *ap = v; 1959 1960 switch (ap->a_name) { 1961 case _PC_LINK_MAX: 1962 *ap->a_retval = LINK_MAX; 1963 return (0); 1964 case _PC_NAME_MAX: 1965 *ap->a_retval = NAME_MAX; 1966 return (0); 1967 case _PC_PATH_MAX: 1968 *ap->a_retval = PATH_MAX; 1969 return (0); 1970 case _PC_PIPE_BUF: 1971 *ap->a_retval = PIPE_BUF; 1972 return (0); 1973 case _PC_CHOWN_RESTRICTED: 1974 *ap->a_retval = 1; 1975 return (0); 1976 case _PC_NO_TRUNC: 1977 *ap->a_retval = 1; 1978 return (0); 1979 case _PC_SYNC_IO: 1980 *ap->a_retval = 1; 1981 return (0); 1982 case _PC_FILESIZEBITS: 1983 *ap->a_retval = 42; 1984 return (0); 1985 default: 1986 return (EINVAL); 1987 } 1988 /* NOTREACHED */ 1989 } 1990 1991 /* 1992 * Advisory record locking support 1993 */ 1994 int 1995 ufs_advlock(void *v) 1996 { 1997 struct vop_advlock_args /* { 1998 struct vnode *a_vp; 1999 caddr_t a_id; 2000 int a_op; 2001 struct flock *a_fl; 2002 int a_flags; 2003 } */ *ap = v; 2004 struct inode *ip; 2005 2006 ip = VTOI(ap->a_vp); 2007 return lf_advlock(ap, &ip->i_lockf, ip->i_size); 2008 } 2009 2010 /* 2011 * Initialize the vnode associated with a new inode, handle aliased 2012 * vnodes. 2013 */ 2014 void 2015 ufs_vinit(struct mount *mntp, int (**specops)(void *), int (**fifoops)(void *), 2016 struct vnode **vpp) 2017 { 2018 struct timeval tv; 2019 struct inode *ip; 2020 struct vnode *vp, *nvp; 2021 dev_t rdev; 2022 struct ufsmount *ump; 2023 2024 vp = *vpp; 2025 ip = VTOI(vp); 2026 switch(vp->v_type = IFTOVT(ip->i_mode)) { 2027 case VCHR: 2028 case VBLK: 2029 vp->v_op = specops; 2030 ump = ip->i_ump; 2031 if (ump->um_fstype == UFS1) 2032 rdev = (dev_t)ufs_rw32(ip->i_ffs1_rdev, 2033 UFS_MPNEEDSWAP(ump)); 2034 else 2035 rdev = (dev_t)ufs_rw64(ip->i_ffs2_rdev, 2036 UFS_MPNEEDSWAP(ump)); 2037 if ((nvp = checkalias(vp, rdev, mntp)) != NULL) { 2038 /* 2039 * Discard unneeded vnode, but save its inode. 2040 */ 2041 nvp->v_data = vp->v_data; 2042 vp->v_data = NULL; 2043 /* XXX spec_vnodeops has no locking, do it explicitly */ 2044 VOP_UNLOCK(vp, 0); 2045 vp->v_op = spec_vnodeop_p; 2046 vp->v_flag &= ~VLOCKSWORK; 2047 vrele(vp); 2048 vgone(vp); 2049 lockmgr(&nvp->v_lock, LK_EXCLUSIVE, &nvp->v_interlock); 2050 /* 2051 * Reinitialize aliased inode. 2052 */ 2053 vp = nvp; 2054 ip->i_vnode = vp; 2055 } 2056 break; 2057 case VFIFO: 2058 vp->v_op = fifoops; 2059 break; 2060 case VNON: 2061 case VBAD: 2062 case VSOCK: 2063 case VLNK: 2064 case VDIR: 2065 case VREG: 2066 break; 2067 } 2068 if (ip->i_number == ROOTINO) 2069 vp->v_flag |= VROOT; 2070 /* 2071 * Initialize modrev times 2072 */ 2073 getmicrouptime(&tv); 2074 ip->i_modrev = (uint64_t)(uint)tv.tv_sec << 32 2075 | tv.tv_usec * 4294u; 2076 *vpp = vp; 2077 } 2078 2079 /* 2080 * Allocate a new inode. 2081 */ 2082 int 2083 ufs_makeinode(int mode, struct vnode *dvp, struct vnode **vpp, 2084 struct componentname *cnp) 2085 { 2086 struct inode *ip, *pdir; 2087 struct direct *newdir; 2088 struct vnode *tvp; 2089 int error, ismember = 0; 2090 2091 pdir = VTOI(dvp); 2092 #ifdef DIAGNOSTIC 2093 if ((cnp->cn_flags & HASBUF) == 0) 2094 panic("ufs_makeinode: no name"); 2095 #endif 2096 if ((mode & IFMT) == 0) 2097 mode |= IFREG; 2098 2099 if ((error = UFS_VALLOC(dvp, mode, cnp->cn_cred, vpp)) != 0) { 2100 PNBUF_PUT(cnp->cn_pnbuf); 2101 vput(dvp); 2102 return (error); 2103 } 2104 tvp = *vpp; 2105 ip = VTOI(tvp); 2106 ip->i_gid = pdir->i_gid; 2107 DIP_ASSIGN(ip, gid, ip->i_gid); 2108 ip->i_uid = kauth_cred_geteuid(cnp->cn_cred); 2109 DIP_ASSIGN(ip, uid, ip->i_uid); 2110 #ifdef QUOTA 2111 if ((error = getinoquota(ip)) || 2112 (error = chkiq(ip, 1, cnp->cn_cred, 0))) { 2113 UFS_VFREE(tvp, ip->i_number, mode); 2114 vput(tvp); 2115 PNBUF_PUT(cnp->cn_pnbuf); 2116 vput(dvp); 2117 return (error); 2118 } 2119 #endif 2120 ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; 2121 ip->i_mode = mode; 2122 DIP_ASSIGN(ip, mode, mode); 2123 tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */ 2124 ip->i_ffs_effnlink = 1; 2125 ip->i_nlink = 1; 2126 DIP_ASSIGN(ip, nlink, 1); 2127 if (DOINGSOFTDEP(tvp)) 2128 softdep_change_linkcnt(ip); 2129 if ((ip->i_mode & ISGID) && (kauth_cred_ismember_gid(cnp->cn_cred, 2130 ip->i_gid, &ismember) != 0 || !ismember) && 2131 kauth_authorize_generic(cnp->cn_cred, KAUTH_GENERIC_ISSUSER, NULL)) { 2132 ip->i_mode &= ~ISGID; 2133 DIP_ASSIGN(ip, mode, ip->i_mode); 2134 } 2135 2136 if (cnp->cn_flags & ISWHITEOUT) { 2137 ip->i_flags |= UF_OPAQUE; 2138 DIP_ASSIGN(ip, flags, ip->i_flags); 2139 } 2140 2141 /* 2142 * Make sure inode goes to disk before directory entry. 2143 */ 2144 if ((error = UFS_UPDATE(tvp, NULL, NULL, UPDATE_DIROP)) != 0) 2145 goto bad; 2146 newdir = pool_get(&ufs_direct_pool, PR_WAITOK); 2147 ufs_makedirentry(ip, cnp, newdir); 2148 error = ufs_direnter(dvp, tvp, newdir, cnp, NULL); 2149 pool_put(&ufs_direct_pool, newdir); 2150 if (error) 2151 goto bad; 2152 if ((cnp->cn_flags & SAVESTART) == 0) 2153 PNBUF_PUT(cnp->cn_pnbuf); 2154 vput(dvp); 2155 *vpp = tvp; 2156 return (0); 2157 2158 bad: 2159 /* 2160 * Write error occurred trying to update the inode 2161 * or the directory so must deallocate the inode. 2162 */ 2163 ip->i_ffs_effnlink = 0; 2164 ip->i_nlink = 0; 2165 DIP_ASSIGN(ip, nlink, 0); 2166 ip->i_flag |= IN_CHANGE; 2167 #ifdef LFS 2168 /* If IN_ADIROP, account for it */ 2169 lfs_unmark_vnode(tvp); 2170 #endif 2171 if (DOINGSOFTDEP(tvp)) 2172 softdep_change_linkcnt(ip); 2173 tvp->v_type = VNON; /* explodes later if VBLK */ 2174 vput(tvp); 2175 PNBUF_PUT(cnp->cn_pnbuf); 2176 vput(dvp); 2177 return (error); 2178 } 2179 2180 /* 2181 * Allocate len bytes at offset off. 2182 */ 2183 int 2184 ufs_gop_alloc(struct vnode *vp, off_t off, off_t len, int flags, 2185 kauth_cred_t cred) 2186 { 2187 struct inode *ip = VTOI(vp); 2188 int error, delta, bshift, bsize; 2189 UVMHIST_FUNC("ufs_gop_alloc"); UVMHIST_CALLED(ubchist); 2190 2191 error = 0; 2192 bshift = vp->v_mount->mnt_fs_bshift; 2193 bsize = 1 << bshift; 2194 2195 delta = off & (bsize - 1); 2196 off -= delta; 2197 len += delta; 2198 2199 while (len > 0) { 2200 bsize = MIN(bsize, len); 2201 2202 error = UFS_BALLOC(vp, off, bsize, cred, flags, NULL); 2203 if (error) { 2204 goto out; 2205 } 2206 2207 /* 2208 * increase file size now, UFS_BALLOC() requires that 2209 * EOF be up-to-date before each call. 2210 */ 2211 2212 if (ip->i_size < off + bsize) { 2213 UVMHIST_LOG(ubchist, "vp %p old 0x%x new 0x%x", 2214 vp, ip->i_size, off + bsize, 0); 2215 ip->i_size = off + bsize; 2216 DIP_ASSIGN(ip, size, ip->i_size); 2217 } 2218 2219 off += bsize; 2220 len -= bsize; 2221 } 2222 2223 out: 2224 return error; 2225 } 2226 2227 void 2228 ufs_gop_markupdate(struct vnode *vp, int flags) 2229 { 2230 u_int32_t mask = 0; 2231 2232 if ((flags & GOP_UPDATE_ACCESSED) != 0) { 2233 mask = IN_ACCESS; 2234 } 2235 if ((flags & GOP_UPDATE_MODIFIED) != 0) { 2236 if (vp->v_type == VREG) { 2237 mask |= IN_CHANGE | IN_UPDATE; 2238 } else { 2239 mask |= IN_MODIFY; 2240 } 2241 } 2242 if (mask) { 2243 struct inode *ip = VTOI(vp); 2244 2245 ip->i_flag |= mask; 2246 } 2247 }
Cache object: 542399c4194d8d25f036d52c134d1148
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