| 1 | /* $NetBSD: ulfs_vnops.c,v 1.44 2016/06/20 03:36:09 dholland Exp $ */ |
| 2 | /* from NetBSD: ufs_vnops.c,v 1.232 2016/05/19 18:32:03 riastradh Exp */ |
| 3 | |
| 4 | /*- |
| 5 | * Copyright (c) 2008 The NetBSD Foundation, Inc. |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * This code is derived from software contributed to The NetBSD Foundation |
| 9 | * by Wasabi Systems, Inc. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 30 | * POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | /* |
| 34 | * Copyright (c) 1982, 1986, 1989, 1993, 1995 |
| 35 | * The Regents of the University of California. All rights reserved. |
| 36 | * (c) UNIX System Laboratories, Inc. |
| 37 | * All or some portions of this file are derived from material licensed |
| 38 | * to the University of California by American Telephone and Telegraph |
| 39 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
| 40 | * the permission of UNIX System Laboratories, Inc. |
| 41 | * |
| 42 | * Redistribution and use in source and binary forms, with or without |
| 43 | * modification, are permitted provided that the following conditions |
| 44 | * are met: |
| 45 | * 1. Redistributions of source code must retain the above copyright |
| 46 | * notice, this list of conditions and the following disclaimer. |
| 47 | * 2. Redistributions in binary form must reproduce the above copyright |
| 48 | * notice, this list of conditions and the following disclaimer in the |
| 49 | * documentation and/or other materials provided with the distribution. |
| 50 | * 3. Neither the name of the University nor the names of its contributors |
| 51 | * may be used to endorse or promote products derived from this software |
| 52 | * without specific prior written permission. |
| 53 | * |
| 54 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 55 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 56 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 57 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 58 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 59 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 60 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 61 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 62 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 63 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 64 | * SUCH DAMAGE. |
| 65 | * |
| 66 | * @(#)ufs_vnops.c 8.28 (Berkeley) 7/31/95 |
| 67 | */ |
| 68 | |
| 69 | #include <sys/cdefs.h> |
| 70 | __KERNEL_RCSID(0, "$NetBSD: ulfs_vnops.c,v 1.44 2016/06/20 03:36:09 dholland Exp $" ); |
| 71 | |
| 72 | #if defined(_KERNEL_OPT) |
| 73 | #include "opt_lfs.h" |
| 74 | #include "opt_quota.h" |
| 75 | #endif |
| 76 | |
| 77 | #include <sys/param.h> |
| 78 | #include <sys/systm.h> |
| 79 | #include <sys/namei.h> |
| 80 | #include <sys/resourcevar.h> |
| 81 | #include <sys/kernel.h> |
| 82 | #include <sys/file.h> |
| 83 | #include <sys/stat.h> |
| 84 | #include <sys/buf.h> |
| 85 | #include <sys/proc.h> |
| 86 | #include <sys/mount.h> |
| 87 | #include <sys/vnode.h> |
| 88 | #include <sys/kmem.h> |
| 89 | #include <sys/malloc.h> |
| 90 | #include <sys/dirent.h> |
| 91 | #include <sys/lockf.h> |
| 92 | #include <sys/kauth.h> |
| 93 | #include <sys/fstrans.h> |
| 94 | |
| 95 | #include <miscfs/specfs/specdev.h> |
| 96 | #include <miscfs/fifofs/fifo.h> |
| 97 | #include <miscfs/genfs/genfs.h> |
| 98 | |
| 99 | #include <ufs/lfs/lfs_extern.h> |
| 100 | #include <ufs/lfs/lfs.h> |
| 101 | #include <ufs/lfs/lfs_accessors.h> |
| 102 | |
| 103 | #include <ufs/lfs/ulfs_inode.h> |
| 104 | #include <ufs/lfs/ulfsmount.h> |
| 105 | #include <ufs/lfs/ulfs_bswap.h> |
| 106 | #include <ufs/lfs/ulfs_extern.h> |
| 107 | #ifdef LFS_DIRHASH |
| 108 | #include <ufs/lfs/ulfs_dirhash.h> |
| 109 | #endif |
| 110 | |
| 111 | #include <uvm/uvm.h> |
| 112 | |
| 113 | static int ulfs_chmod(struct vnode *, int, kauth_cred_t, struct lwp *); |
| 114 | static int ulfs_chown(struct vnode *, uid_t, gid_t, kauth_cred_t, |
| 115 | struct lwp *); |
| 116 | |
| 117 | /* |
| 118 | * Open called. |
| 119 | * |
| 120 | * Nothing to do. |
| 121 | */ |
| 122 | /* ARGSUSED */ |
| 123 | int |
| 124 | ulfs_open(void *v) |
| 125 | { |
| 126 | struct vop_open_args /* { |
| 127 | struct vnode *a_vp; |
| 128 | int a_mode; |
| 129 | kauth_cred_t a_cred; |
| 130 | } */ *ap = v; |
| 131 | |
| 132 | /* |
| 133 | * Files marked append-only must be opened for appending. |
| 134 | */ |
| 135 | if ((VTOI(ap->a_vp)->i_flags & APPEND) && |
| 136 | (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) |
| 137 | return (EPERM); |
| 138 | return (0); |
| 139 | } |
| 140 | |
| 141 | static int |
| 142 | ulfs_check_possible(struct vnode *vp, struct inode *ip, mode_t mode, |
| 143 | kauth_cred_t cred) |
| 144 | { |
| 145 | #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) |
| 146 | int error; |
| 147 | #endif |
| 148 | |
| 149 | /* |
| 150 | * Disallow write attempts on read-only file systems; |
| 151 | * unless the file is a socket, fifo, or a block or |
| 152 | * character device resident on the file system. |
| 153 | */ |
| 154 | if (mode & VWRITE) { |
| 155 | switch (vp->v_type) { |
| 156 | case VDIR: |
| 157 | case VLNK: |
| 158 | case VREG: |
| 159 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 160 | return (EROFS); |
| 161 | #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) |
| 162 | fstrans_start(vp->v_mount, FSTRANS_SHARED); |
| 163 | error = lfs_chkdq(ip, 0, cred, 0); |
| 164 | fstrans_done(vp->v_mount); |
| 165 | if (error != 0) |
| 166 | return error; |
| 167 | #endif |
| 168 | break; |
| 169 | case VBAD: |
| 170 | case VBLK: |
| 171 | case VCHR: |
| 172 | case VSOCK: |
| 173 | case VFIFO: |
| 174 | case VNON: |
| 175 | default: |
| 176 | break; |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | /* If it is a snapshot, nobody gets access to it. */ |
| 181 | if ((ip->i_flags & SF_SNAPSHOT)) |
| 182 | return (EPERM); |
| 183 | /* If immutable bit set, nobody gets to write it. */ |
| 184 | if ((mode & VWRITE) && (ip->i_flags & IMMUTABLE)) |
| 185 | return (EPERM); |
| 186 | |
| 187 | return 0; |
| 188 | } |
| 189 | |
| 190 | static int |
| 191 | ulfs_check_permitted(struct vnode *vp, struct inode *ip, mode_t mode, |
| 192 | kauth_cred_t cred) |
| 193 | { |
| 194 | |
| 195 | return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, vp->v_type, |
| 196 | ip->i_mode & ALLPERMS), vp, NULL, genfs_can_access(vp->v_type, |
| 197 | ip->i_mode & ALLPERMS, ip->i_uid, ip->i_gid, mode, cred)); |
| 198 | } |
| 199 | |
| 200 | int |
| 201 | ulfs_access(void *v) |
| 202 | { |
| 203 | struct vop_access_args /* { |
| 204 | struct vnode *a_vp; |
| 205 | int a_mode; |
| 206 | kauth_cred_t a_cred; |
| 207 | } */ *ap = v; |
| 208 | struct vnode *vp; |
| 209 | struct inode *ip; |
| 210 | mode_t mode; |
| 211 | int error; |
| 212 | |
| 213 | vp = ap->a_vp; |
| 214 | ip = VTOI(vp); |
| 215 | mode = ap->a_mode; |
| 216 | |
| 217 | error = ulfs_check_possible(vp, ip, mode, ap->a_cred); |
| 218 | if (error) |
| 219 | return error; |
| 220 | |
| 221 | error = ulfs_check_permitted(vp, ip, mode, ap->a_cred); |
| 222 | |
| 223 | return error; |
| 224 | } |
| 225 | |
| 226 | /* |
| 227 | * Set attribute vnode op. called from several syscalls |
| 228 | */ |
| 229 | int |
| 230 | ulfs_setattr(void *v) |
| 231 | { |
| 232 | struct vop_setattr_args /* { |
| 233 | struct vnode *a_vp; |
| 234 | struct vattr *a_vap; |
| 235 | kauth_cred_t a_cred; |
| 236 | } */ *ap = v; |
| 237 | struct vattr *vap; |
| 238 | struct vnode *vp; |
| 239 | struct inode *ip; |
| 240 | struct lfs *fs; |
| 241 | kauth_cred_t cred; |
| 242 | struct lwp *l; |
| 243 | int error; |
| 244 | kauth_action_t action; |
| 245 | bool changing_sysflags; |
| 246 | |
| 247 | vap = ap->a_vap; |
| 248 | vp = ap->a_vp; |
| 249 | ip = VTOI(vp); |
| 250 | fs = ip->i_lfs; |
| 251 | cred = ap->a_cred; |
| 252 | l = curlwp; |
| 253 | action = KAUTH_VNODE_WRITE_FLAGS; |
| 254 | changing_sysflags = false; |
| 255 | |
| 256 | /* |
| 257 | * Check for unsettable attributes. |
| 258 | */ |
| 259 | if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || |
| 260 | (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || |
| 261 | (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || |
| 262 | ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { |
| 263 | return (EINVAL); |
| 264 | } |
| 265 | |
| 266 | fstrans_start(vp->v_mount, FSTRANS_SHARED); |
| 267 | |
| 268 | if (vap->va_flags != VNOVAL) { |
| 269 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 270 | error = EROFS; |
| 271 | goto out; |
| 272 | } |
| 273 | |
| 274 | /* Snapshot flag cannot be set or cleared */ |
| 275 | if ((vap->va_flags & (SF_SNAPSHOT | SF_SNAPINVAL)) != |
| 276 | (ip->i_flags & (SF_SNAPSHOT | SF_SNAPINVAL))) { |
| 277 | error = EPERM; |
| 278 | goto out; |
| 279 | } |
| 280 | |
| 281 | if (ip->i_flags & (SF_IMMUTABLE | SF_APPEND)) { |
| 282 | action |= KAUTH_VNODE_HAS_SYSFLAGS; |
| 283 | } |
| 284 | |
| 285 | if ((vap->va_flags & SF_SETTABLE) != |
| 286 | (ip->i_flags & SF_SETTABLE)) { |
| 287 | action |= KAUTH_VNODE_WRITE_SYSFLAGS; |
| 288 | changing_sysflags = true; |
| 289 | } |
| 290 | |
| 291 | error = kauth_authorize_vnode(cred, action, vp, NULL, |
| 292 | genfs_can_chflags(cred, vp->v_type, ip->i_uid, |
| 293 | changing_sysflags)); |
| 294 | if (error) |
| 295 | goto out; |
| 296 | |
| 297 | if (changing_sysflags) { |
| 298 | ip->i_flags = vap->va_flags; |
| 299 | DIP_ASSIGN(ip, flags, ip->i_flags); |
| 300 | } else { |
| 301 | ip->i_flags &= SF_SETTABLE; |
| 302 | ip->i_flags |= (vap->va_flags & UF_SETTABLE); |
| 303 | DIP_ASSIGN(ip, flags, ip->i_flags); |
| 304 | } |
| 305 | ip->i_flag |= IN_CHANGE; |
| 306 | if (vap->va_flags & (IMMUTABLE | APPEND)) { |
| 307 | error = 0; |
| 308 | goto out; |
| 309 | } |
| 310 | } |
| 311 | if (ip->i_flags & (IMMUTABLE | APPEND)) { |
| 312 | error = EPERM; |
| 313 | goto out; |
| 314 | } |
| 315 | /* |
| 316 | * Go through the fields and update iff not VNOVAL. |
| 317 | */ |
| 318 | if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { |
| 319 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 320 | error = EROFS; |
| 321 | goto out; |
| 322 | } |
| 323 | error = ulfs_chown(vp, vap->va_uid, vap->va_gid, cred, l); |
| 324 | if (error) |
| 325 | goto out; |
| 326 | } |
| 327 | if (vap->va_size != VNOVAL) { |
| 328 | /* |
| 329 | * Disallow write attempts on read-only file systems; |
| 330 | * unless the file is a socket, fifo, or a block or |
| 331 | * character device resident on the file system. |
| 332 | */ |
| 333 | switch (vp->v_type) { |
| 334 | case VDIR: |
| 335 | error = EISDIR; |
| 336 | goto out; |
| 337 | case VCHR: |
| 338 | case VBLK: |
| 339 | case VFIFO: |
| 340 | break; |
| 341 | case VREG: |
| 342 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 343 | error = EROFS; |
| 344 | goto out; |
| 345 | } |
| 346 | if ((ip->i_flags & SF_SNAPSHOT) != 0) { |
| 347 | error = EPERM; |
| 348 | goto out; |
| 349 | } |
| 350 | error = lfs_truncate(vp, vap->va_size, 0, cred); |
| 351 | if (error) |
| 352 | goto out; |
| 353 | break; |
| 354 | default: |
| 355 | error = EOPNOTSUPP; |
| 356 | goto out; |
| 357 | } |
| 358 | } |
| 359 | ip = VTOI(vp); |
| 360 | if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL || |
| 361 | vap->va_birthtime.tv_sec != VNOVAL) { |
| 362 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 363 | error = EROFS; |
| 364 | goto out; |
| 365 | } |
| 366 | if ((ip->i_flags & SF_SNAPSHOT) != 0) { |
| 367 | error = EPERM; |
| 368 | goto out; |
| 369 | } |
| 370 | error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, |
| 371 | NULL, genfs_can_chtimes(vp, vap->va_vaflags, ip->i_uid, cred)); |
| 372 | if (error) |
| 373 | goto out; |
| 374 | if (vap->va_atime.tv_sec != VNOVAL) |
| 375 | if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) |
| 376 | ip->i_flag |= IN_ACCESS; |
| 377 | if (vap->va_mtime.tv_sec != VNOVAL) { |
| 378 | ip->i_flag |= IN_CHANGE | IN_UPDATE; |
| 379 | if (vp->v_mount->mnt_flag & MNT_RELATIME) |
| 380 | ip->i_flag |= IN_ACCESS; |
| 381 | } |
| 382 | if (vap->va_birthtime.tv_sec != VNOVAL) { |
| 383 | lfs_dino_setbirthtime(fs, ip->i_din, |
| 384 | &vap->va_birthtime); |
| 385 | } |
| 386 | error = lfs_update(vp, &vap->va_atime, &vap->va_mtime, 0); |
| 387 | if (error) |
| 388 | goto out; |
| 389 | } |
| 390 | error = 0; |
| 391 | if (vap->va_mode != (mode_t)VNOVAL) { |
| 392 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 393 | error = EROFS; |
| 394 | goto out; |
| 395 | } |
| 396 | if ((ip->i_flags & SF_SNAPSHOT) != 0 && |
| 397 | (vap->va_mode & (S_IXUSR | S_IWUSR | S_IXGRP | S_IWGRP | |
| 398 | S_IXOTH | S_IWOTH))) { |
| 399 | error = EPERM; |
| 400 | goto out; |
| 401 | } |
| 402 | error = ulfs_chmod(vp, (int)vap->va_mode, cred, l); |
| 403 | } |
| 404 | VN_KNOTE(vp, NOTE_ATTRIB); |
| 405 | out: |
| 406 | fstrans_done(vp->v_mount); |
| 407 | return (error); |
| 408 | } |
| 409 | |
| 410 | /* |
| 411 | * Change the mode on a file. |
| 412 | * Inode must be locked before calling. |
| 413 | */ |
| 414 | static int |
| 415 | ulfs_chmod(struct vnode *vp, int mode, kauth_cred_t cred, struct lwp *l) |
| 416 | { |
| 417 | struct inode *ip; |
| 418 | int error; |
| 419 | |
| 420 | ip = VTOI(vp); |
| 421 | |
| 422 | error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, |
| 423 | NULL, genfs_can_chmod(vp->v_type, cred, ip->i_uid, ip->i_gid, mode)); |
| 424 | if (error) |
| 425 | return (error); |
| 426 | |
| 427 | fstrans_start(vp->v_mount, FSTRANS_SHARED); |
| 428 | ip->i_mode &= ~ALLPERMS; |
| 429 | ip->i_mode |= (mode & ALLPERMS); |
| 430 | ip->i_flag |= IN_CHANGE; |
| 431 | DIP_ASSIGN(ip, mode, ip->i_mode); |
| 432 | fstrans_done(vp->v_mount); |
| 433 | return (0); |
| 434 | } |
| 435 | |
| 436 | /* |
| 437 | * Perform chown operation on inode ip; |
| 438 | * inode must be locked prior to call. |
| 439 | */ |
| 440 | static int |
| 441 | ulfs_chown(struct vnode *vp, uid_t uid, gid_t gid, kauth_cred_t cred, |
| 442 | struct lwp *l) |
| 443 | { |
| 444 | struct inode *ip; |
| 445 | int error = 0; |
| 446 | #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) |
| 447 | uid_t ouid; |
| 448 | gid_t ogid; |
| 449 | int64_t change; |
| 450 | #endif |
| 451 | ip = VTOI(vp); |
| 452 | error = 0; |
| 453 | |
| 454 | if (uid == (uid_t)VNOVAL) |
| 455 | uid = ip->i_uid; |
| 456 | if (gid == (gid_t)VNOVAL) |
| 457 | gid = ip->i_gid; |
| 458 | |
| 459 | error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, vp, |
| 460 | NULL, genfs_can_chown(cred, ip->i_uid, ip->i_gid, uid, gid)); |
| 461 | if (error) |
| 462 | return (error); |
| 463 | |
| 464 | fstrans_start(vp->v_mount, FSTRANS_SHARED); |
| 465 | #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) |
| 466 | ogid = ip->i_gid; |
| 467 | ouid = ip->i_uid; |
| 468 | change = DIP(ip, blocks); |
| 469 | (void) lfs_chkdq(ip, -change, cred, 0); |
| 470 | (void) lfs_chkiq(ip, -1, cred, 0); |
| 471 | #endif |
| 472 | ip->i_gid = gid; |
| 473 | DIP_ASSIGN(ip, gid, gid); |
| 474 | ip->i_uid = uid; |
| 475 | DIP_ASSIGN(ip, uid, uid); |
| 476 | #if defined(LFS_QUOTA) || defined(LFS_QUOTA2) |
| 477 | if ((error = lfs_chkdq(ip, change, cred, 0)) == 0) { |
| 478 | if ((error = lfs_chkiq(ip, 1, cred, 0)) == 0) |
| 479 | goto good; |
| 480 | else |
| 481 | (void) lfs_chkdq(ip, -change, cred, FORCE); |
| 482 | } |
| 483 | ip->i_gid = ogid; |
| 484 | DIP_ASSIGN(ip, gid, ogid); |
| 485 | ip->i_uid = ouid; |
| 486 | DIP_ASSIGN(ip, uid, ouid); |
| 487 | (void) lfs_chkdq(ip, change, cred, FORCE); |
| 488 | (void) lfs_chkiq(ip, 1, cred, FORCE); |
| 489 | fstrans_done(vp->v_mount); |
| 490 | return (error); |
| 491 | good: |
| 492 | #endif /* LFS_QUOTA || LFS_QUOTA2 */ |
| 493 | ip->i_flag |= IN_CHANGE; |
| 494 | fstrans_done(vp->v_mount); |
| 495 | return (0); |
| 496 | } |
| 497 | |
| 498 | int |
| 499 | ulfs_remove(void *v) |
| 500 | { |
| 501 | struct vop_remove_args /* { |
| 502 | struct vnode *a_dvp; |
| 503 | struct vnode *a_vp; |
| 504 | struct componentname *a_cnp; |
| 505 | } */ *ap = v; |
| 506 | struct vnode *vp, *dvp; |
| 507 | struct inode *ip; |
| 508 | struct mount *mp; |
| 509 | int error; |
| 510 | struct ulfs_lookup_results *ulr; |
| 511 | |
| 512 | vp = ap->a_vp; |
| 513 | dvp = ap->a_dvp; |
| 514 | ip = VTOI(vp); |
| 515 | mp = dvp->v_mount; |
| 516 | KASSERT(mp == vp->v_mount); /* XXX Not stable without lock. */ |
| 517 | |
| 518 | /* XXX should handle this material another way */ |
| 519 | ulr = &VTOI(dvp)->i_crap; |
| 520 | ULFS_CHECK_CRAPCOUNTER(VTOI(dvp)); |
| 521 | |
| 522 | fstrans_start(mp, FSTRANS_SHARED); |
| 523 | if (vp->v_type == VDIR || (ip->i_flags & (IMMUTABLE | APPEND)) || |
| 524 | (VTOI(dvp)->i_flags & APPEND)) |
| 525 | error = EPERM; |
| 526 | else { |
| 527 | error = ulfs_dirremove(dvp, ulr, |
| 528 | ip, ap->a_cnp->cn_flags, 0); |
| 529 | } |
| 530 | VN_KNOTE(vp, NOTE_DELETE); |
| 531 | VN_KNOTE(dvp, NOTE_WRITE); |
| 532 | if (dvp == vp) |
| 533 | vrele(vp); |
| 534 | else |
| 535 | vput(vp); |
| 536 | vput(dvp); |
| 537 | fstrans_done(mp); |
| 538 | return (error); |
| 539 | } |
| 540 | |
| 541 | /* |
| 542 | * ulfs_link: create hard link. |
| 543 | */ |
| 544 | int |
| 545 | ulfs_link(void *v) |
| 546 | { |
| 547 | struct vop_link_v2_args /* { |
| 548 | struct vnode *a_dvp; |
| 549 | struct vnode *a_vp; |
| 550 | struct componentname *a_cnp; |
| 551 | } */ *ap = v; |
| 552 | struct vnode *dvp = ap->a_dvp; |
| 553 | struct vnode *vp = ap->a_vp; |
| 554 | struct componentname *cnp = ap->a_cnp; |
| 555 | struct mount *mp = dvp->v_mount; |
| 556 | struct inode *ip; |
| 557 | int error; |
| 558 | struct ulfs_lookup_results *ulr; |
| 559 | |
| 560 | KASSERT(dvp != vp); |
| 561 | KASSERT(vp->v_type != VDIR); |
| 562 | KASSERT(mp == vp->v_mount); /* XXX Not stable without lock. */ |
| 563 | |
| 564 | /* XXX should handle this material another way */ |
| 565 | ulr = &VTOI(dvp)->i_crap; |
| 566 | ULFS_CHECK_CRAPCOUNTER(VTOI(dvp)); |
| 567 | |
| 568 | fstrans_start(mp, FSTRANS_SHARED); |
| 569 | error = vn_lock(vp, LK_EXCLUSIVE); |
| 570 | if (error) { |
| 571 | VOP_ABORTOP(dvp, cnp); |
| 572 | goto out2; |
| 573 | } |
| 574 | ip = VTOI(vp); |
| 575 | if ((nlink_t)ip->i_nlink >= LINK_MAX) { |
| 576 | VOP_ABORTOP(dvp, cnp); |
| 577 | error = EMLINK; |
| 578 | goto out1; |
| 579 | } |
| 580 | if (ip->i_flags & (IMMUTABLE | APPEND)) { |
| 581 | VOP_ABORTOP(dvp, cnp); |
| 582 | error = EPERM; |
| 583 | goto out1; |
| 584 | } |
| 585 | ip->i_nlink++; |
| 586 | DIP_ASSIGN(ip, nlink, ip->i_nlink); |
| 587 | ip->i_flag |= IN_CHANGE; |
| 588 | error = lfs_update(vp, NULL, NULL, UPDATE_DIROP); |
| 589 | if (!error) { |
| 590 | error = ulfs_direnter(dvp, ulr, vp, |
| 591 | cnp, ip->i_number, LFS_IFTODT(ip->i_mode), NULL); |
| 592 | } |
| 593 | if (error) { |
| 594 | ip->i_nlink--; |
| 595 | DIP_ASSIGN(ip, nlink, ip->i_nlink); |
| 596 | ip->i_flag |= IN_CHANGE; |
| 597 | } |
| 598 | out1: |
| 599 | VOP_UNLOCK(vp); |
| 600 | out2: |
| 601 | VN_KNOTE(vp, NOTE_LINK); |
| 602 | VN_KNOTE(dvp, NOTE_WRITE); |
| 603 | fstrans_done(mp); |
| 604 | return (error); |
| 605 | } |
| 606 | |
| 607 | /* |
| 608 | * whiteout vnode call |
| 609 | */ |
| 610 | int |
| 611 | ulfs_whiteout(void *v) |
| 612 | { |
| 613 | struct vop_whiteout_args /* { |
| 614 | struct vnode *a_dvp; |
| 615 | struct componentname *a_cnp; |
| 616 | int a_flags; |
| 617 | } */ *ap = v; |
| 618 | struct vnode *dvp = ap->a_dvp; |
| 619 | struct componentname *cnp = ap->a_cnp; |
| 620 | int error; |
| 621 | struct ulfsmount *ump = VFSTOULFS(dvp->v_mount); |
| 622 | struct lfs *fs = ump->um_lfs; |
| 623 | struct ulfs_lookup_results *ulr; |
| 624 | |
| 625 | /* XXX should handle this material another way */ |
| 626 | ulr = &VTOI(dvp)->i_crap; |
| 627 | ULFS_CHECK_CRAPCOUNTER(VTOI(dvp)); |
| 628 | |
| 629 | error = 0; |
| 630 | switch (ap->a_flags) { |
| 631 | case LOOKUP: |
| 632 | /* 4.4 format directories support whiteout operations */ |
| 633 | if (fs->um_maxsymlinklen > 0) |
| 634 | return (0); |
| 635 | return (EOPNOTSUPP); |
| 636 | |
| 637 | case CREATE: |
| 638 | /* create a new directory whiteout */ |
| 639 | fstrans_start(dvp->v_mount, FSTRANS_SHARED); |
| 640 | #ifdef DIAGNOSTIC |
| 641 | if (fs->um_maxsymlinklen <= 0) |
| 642 | panic("ulfs_whiteout: old format filesystem" ); |
| 643 | #endif |
| 644 | |
| 645 | error = ulfs_direnter(dvp, ulr, NULL, |
| 646 | cnp, ULFS_WINO, LFS_DT_WHT, NULL); |
| 647 | break; |
| 648 | |
| 649 | case DELETE: |
| 650 | /* remove an existing directory whiteout */ |
| 651 | fstrans_start(dvp->v_mount, FSTRANS_SHARED); |
| 652 | #ifdef DIAGNOSTIC |
| 653 | if (fs->um_maxsymlinklen <= 0) |
| 654 | panic("ulfs_whiteout: old format filesystem" ); |
| 655 | #endif |
| 656 | |
| 657 | cnp->cn_flags &= ~DOWHITEOUT; |
| 658 | error = ulfs_dirremove(dvp, ulr, NULL, cnp->cn_flags, 0); |
| 659 | break; |
| 660 | default: |
| 661 | panic("ulfs_whiteout: unknown op" ); |
| 662 | /* NOTREACHED */ |
| 663 | } |
| 664 | fstrans_done(dvp->v_mount); |
| 665 | return (error); |
| 666 | } |
| 667 | |
| 668 | int |
| 669 | ulfs_rmdir(void *v) |
| 670 | { |
| 671 | struct vop_rmdir_args /* { |
| 672 | struct vnode *a_dvp; |
| 673 | struct vnode *a_vp; |
| 674 | struct componentname *a_cnp; |
| 675 | } */ *ap = v; |
| 676 | struct vnode *vp, *dvp; |
| 677 | struct componentname *cnp; |
| 678 | struct inode *ip, *dp; |
| 679 | int error; |
| 680 | struct ulfs_lookup_results *ulr; |
| 681 | |
| 682 | vp = ap->a_vp; |
| 683 | dvp = ap->a_dvp; |
| 684 | cnp = ap->a_cnp; |
| 685 | ip = VTOI(vp); |
| 686 | dp = VTOI(dvp); |
| 687 | |
| 688 | /* XXX should handle this material another way */ |
| 689 | ulr = &dp->i_crap; |
| 690 | ULFS_CHECK_CRAPCOUNTER(dp); |
| 691 | |
| 692 | /* |
| 693 | * No rmdir "." or of mounted directories please. |
| 694 | */ |
| 695 | if (dp == ip || vp->v_mountedhere != NULL) { |
| 696 | if (dp == ip) |
| 697 | vrele(dvp); |
| 698 | else |
| 699 | vput(dvp); |
| 700 | vput(vp); |
| 701 | return (EINVAL); |
| 702 | } |
| 703 | |
| 704 | fstrans_start(dvp->v_mount, FSTRANS_SHARED); |
| 705 | |
| 706 | /* |
| 707 | * Do not remove a directory that is in the process of being renamed. |
| 708 | * Verify that the directory is empty (and valid). (Rmdir ".." won't |
| 709 | * be valid since ".." will contain a reference to the current |
| 710 | * directory and thus be non-empty.) |
| 711 | */ |
| 712 | error = 0; |
| 713 | if (ip->i_nlink != 2 || |
| 714 | !ulfs_dirempty(ip, dp->i_number, cnp->cn_cred)) { |
| 715 | error = ENOTEMPTY; |
| 716 | goto out; |
| 717 | } |
| 718 | if ((dp->i_flags & APPEND) || |
| 719 | (ip->i_flags & (IMMUTABLE | APPEND))) { |
| 720 | error = EPERM; |
| 721 | goto out; |
| 722 | } |
| 723 | /* |
| 724 | * Delete reference to directory before purging |
| 725 | * inode. If we crash in between, the directory |
| 726 | * will be reattached to lost+found, |
| 727 | */ |
| 728 | error = ulfs_dirremove(dvp, ulr, ip, cnp->cn_flags, 1); |
| 729 | if (error) { |
| 730 | goto out; |
| 731 | } |
| 732 | VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); |
| 733 | cache_purge(dvp); |
| 734 | /* |
| 735 | * Truncate inode. The only stuff left in the directory is "." and |
| 736 | * "..". The "." reference is inconsequential since we're quashing |
| 737 | * it. |
| 738 | */ |
| 739 | dp->i_nlink--; |
| 740 | DIP_ASSIGN(dp, nlink, dp->i_nlink); |
| 741 | dp->i_flag |= IN_CHANGE; |
| 742 | ip->i_nlink--; |
| 743 | DIP_ASSIGN(ip, nlink, ip->i_nlink); |
| 744 | ip->i_flag |= IN_CHANGE; |
| 745 | error = lfs_truncate(vp, (off_t)0, IO_SYNC, cnp->cn_cred); |
| 746 | cache_purge(vp); |
| 747 | #ifdef LFS_DIRHASH |
| 748 | if (ip->i_dirhash != NULL) |
| 749 | ulfsdirhash_free(ip); |
| 750 | #endif |
| 751 | out: |
| 752 | VN_KNOTE(vp, NOTE_DELETE); |
| 753 | vput(vp); |
| 754 | fstrans_done(dvp->v_mount); |
| 755 | vput(dvp); |
| 756 | return (error); |
| 757 | } |
| 758 | |
| 759 | /* |
| 760 | * Vnode op for reading directories. |
| 761 | * |
| 762 | * This routine handles converting from the on-disk directory format |
| 763 | * "struct lfs_direct" to the in-memory format "struct dirent" as well as |
| 764 | * byte swapping the entries if necessary. |
| 765 | */ |
| 766 | int |
| 767 | ulfs_readdir(void *v) |
| 768 | { |
| 769 | struct vop_readdir_args /* { |
| 770 | struct vnode *a_vp; |
| 771 | struct uio *a_uio; |
| 772 | kauth_cred_t a_cred; |
| 773 | int *a_eofflag; |
| 774 | off_t **a_cookies; |
| 775 | int *ncookies; |
| 776 | } */ *ap = v; |
| 777 | struct vnode *vp = ap->a_vp; |
| 778 | LFS_DIRHEADER *cdp, *ecdp; |
| 779 | struct dirent *ndp; |
| 780 | char *cdbuf, *ndbuf, *endp; |
| 781 | struct uio auio, *uio; |
| 782 | struct iovec aiov; |
| 783 | int error; |
| 784 | size_t count, ccount, rcount, cdbufsz, ndbufsz; |
| 785 | off_t off, *ccp; |
| 786 | off_t startoff; |
| 787 | size_t skipbytes; |
| 788 | struct ulfsmount *ump = VFSTOULFS(vp->v_mount); |
| 789 | struct lfs *fs = ump->um_lfs; |
| 790 | uio = ap->a_uio; |
| 791 | count = uio->uio_resid; |
| 792 | rcount = count - ((uio->uio_offset + count) & (fs->um_dirblksiz - 1)); |
| 793 | |
| 794 | if (rcount < LFS_DIRECTSIZ(fs, 0) || count < _DIRENT_MINSIZE(ndp)) |
| 795 | return EINVAL; |
| 796 | |
| 797 | startoff = uio->uio_offset & ~(fs->um_dirblksiz - 1); |
| 798 | skipbytes = uio->uio_offset - startoff; |
| 799 | rcount += skipbytes; |
| 800 | |
| 801 | auio.uio_iov = &aiov; |
| 802 | auio.uio_iovcnt = 1; |
| 803 | auio.uio_offset = startoff; |
| 804 | auio.uio_resid = rcount; |
| 805 | UIO_SETUP_SYSSPACE(&auio); |
| 806 | auio.uio_rw = UIO_READ; |
| 807 | cdbufsz = rcount; |
| 808 | cdbuf = kmem_alloc(cdbufsz, KM_SLEEP); |
| 809 | aiov.iov_base = cdbuf; |
| 810 | aiov.iov_len = rcount; |
| 811 | error = VOP_READ(vp, &auio, 0, ap->a_cred); |
| 812 | if (error != 0) { |
| 813 | kmem_free(cdbuf, cdbufsz); |
| 814 | return error; |
| 815 | } |
| 816 | |
| 817 | rcount -= auio.uio_resid; |
| 818 | |
| 819 | cdp = (LFS_DIRHEADER *)(void *)cdbuf; |
| 820 | ecdp = (LFS_DIRHEADER *)(void *)&cdbuf[rcount]; |
| 821 | |
| 822 | ndbufsz = count; |
| 823 | ndbuf = kmem_alloc(ndbufsz, KM_SLEEP); |
| 824 | ndp = (struct dirent *)(void *)ndbuf; |
| 825 | endp = &ndbuf[count]; |
| 826 | |
| 827 | off = uio->uio_offset; |
| 828 | if (ap->a_cookies) { |
| 829 | ccount = rcount / _DIRENT_RECLEN(ndp, 1); |
| 830 | ccp = *(ap->a_cookies) = malloc(ccount * sizeof(*ccp), |
| 831 | M_TEMP, M_WAITOK); |
| 832 | } else { |
| 833 | /* XXX: GCC */ |
| 834 | ccount = 0; |
| 835 | ccp = NULL; |
| 836 | } |
| 837 | |
| 838 | while (cdp < ecdp) { |
| 839 | if (skipbytes > 0) { |
| 840 | if (lfs_dir_getreclen(fs, cdp) <= skipbytes) { |
| 841 | skipbytes -= lfs_dir_getreclen(fs, cdp); |
| 842 | cdp = LFS_NEXTDIR(fs, cdp); |
| 843 | continue; |
| 844 | } |
| 845 | /* |
| 846 | * invalid cookie. |
| 847 | */ |
| 848 | error = EINVAL; |
| 849 | goto out; |
| 850 | } |
| 851 | if (lfs_dir_getreclen(fs, cdp) == 0) { |
| 852 | struct dirent *ondp = ndp; |
| 853 | ndp->d_reclen = _DIRENT_MINSIZE(ndp); |
| 854 | ndp = _DIRENT_NEXT(ndp); |
| 855 | ondp->d_reclen = 0; |
| 856 | cdp = ecdp; |
| 857 | break; |
| 858 | } |
| 859 | ndp->d_type = lfs_dir_gettype(fs, cdp); |
| 860 | ndp->d_namlen = lfs_dir_getnamlen(fs, cdp); |
| 861 | ndp->d_reclen = _DIRENT_RECLEN(ndp, ndp->d_namlen); |
| 862 | if ((char *)(void *)ndp + ndp->d_reclen + |
| 863 | _DIRENT_MINSIZE(ndp) > endp) |
| 864 | break; |
| 865 | ndp->d_fileno = lfs_dir_getino(fs, cdp); |
| 866 | (void)memcpy(ndp->d_name, lfs_dir_nameptr(fs, cdp), |
| 867 | ndp->d_namlen); |
| 868 | memset(&ndp->d_name[ndp->d_namlen], 0, |
| 869 | ndp->d_reclen - _DIRENT_NAMEOFF(ndp) - ndp->d_namlen); |
| 870 | off += lfs_dir_getreclen(fs, cdp); |
| 871 | if (ap->a_cookies) { |
| 872 | KASSERT(ccp - *(ap->a_cookies) < ccount); |
| 873 | *(ccp++) = off; |
| 874 | } |
| 875 | ndp = _DIRENT_NEXT(ndp); |
| 876 | cdp = LFS_NEXTDIR(fs, cdp); |
| 877 | } |
| 878 | |
| 879 | count = ((char *)(void *)ndp - ndbuf); |
| 880 | error = uiomove(ndbuf, count, uio); |
| 881 | out: |
| 882 | if (ap->a_cookies) { |
| 883 | if (error) { |
| 884 | free(*(ap->a_cookies), M_TEMP); |
| 885 | *(ap->a_cookies) = NULL; |
| 886 | *(ap->a_ncookies) = 0; |
| 887 | } else { |
| 888 | *ap->a_ncookies = ccp - *(ap->a_cookies); |
| 889 | } |
| 890 | } |
| 891 | uio->uio_offset = off; |
| 892 | kmem_free(ndbuf, ndbufsz); |
| 893 | kmem_free(cdbuf, cdbufsz); |
| 894 | *ap->a_eofflag = VTOI(vp)->i_size <= uio->uio_offset; |
| 895 | return error; |
| 896 | } |
| 897 | |
| 898 | /* |
| 899 | * Return target name of a symbolic link |
| 900 | */ |
| 901 | int |
| 902 | ulfs_readlink(void *v) |
| 903 | { |
| 904 | struct vop_readlink_args /* { |
| 905 | struct vnode *a_vp; |
| 906 | struct uio *a_uio; |
| 907 | kauth_cred_t a_cred; |
| 908 | } */ *ap = v; |
| 909 | struct vnode *vp = ap->a_vp; |
| 910 | struct inode *ip = VTOI(vp); |
| 911 | struct ulfsmount *ump = VFSTOULFS(vp->v_mount); |
| 912 | struct lfs *fs = ump->um_lfs; |
| 913 | int isize; |
| 914 | |
| 915 | /* |
| 916 | * The test against um_maxsymlinklen is off by one; it should |
| 917 | * theoretically be <=, not <. However, it cannot be changed |
| 918 | * as that would break compatibility with existing fs images. |
| 919 | */ |
| 920 | |
| 921 | isize = ip->i_size; |
| 922 | if (isize < fs->um_maxsymlinklen || |
| 923 | (fs->um_maxsymlinklen == 0 && DIP(ip, blocks) == 0)) { |
| 924 | uiomove((char *)SHORTLINK(ip), isize, ap->a_uio); |
| 925 | return (0); |
| 926 | } |
| 927 | return (lfs_bufrd(vp, ap->a_uio, 0, ap->a_cred)); |
| 928 | } |
| 929 | |
| 930 | /* |
| 931 | * Print out the contents of an inode. |
| 932 | */ |
| 933 | int |
| 934 | ulfs_print(void *v) |
| 935 | { |
| 936 | struct vop_print_args /* { |
| 937 | struct vnode *a_vp; |
| 938 | } */ *ap = v; |
| 939 | struct vnode *vp; |
| 940 | struct inode *ip; |
| 941 | |
| 942 | vp = ap->a_vp; |
| 943 | ip = VTOI(vp); |
| 944 | printf("tag VT_ULFS, ino %llu, on dev %llu, %llu" , |
| 945 | (unsigned long long)ip->i_number, |
| 946 | (unsigned long long)major(ip->i_dev), |
| 947 | (unsigned long long)minor(ip->i_dev)); |
| 948 | printf(" flags 0x%x, nlink %d\n" , |
| 949 | ip->i_flag, ip->i_nlink); |
| 950 | printf("\tmode 0%o, owner %d, group %d, size %qd" , |
| 951 | ip->i_mode, ip->i_uid, ip->i_gid, |
| 952 | (long long)ip->i_size); |
| 953 | if (vp->v_type == VFIFO) |
| 954 | VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); |
| 955 | printf("\n" ); |
| 956 | return (0); |
| 957 | } |
| 958 | |
| 959 | /* |
| 960 | * Read wrapper for special devices. |
| 961 | */ |
| 962 | int |
| 963 | ulfsspec_read(void *v) |
| 964 | { |
| 965 | struct vop_read_args /* { |
| 966 | struct vnode *a_vp; |
| 967 | struct uio *a_uio; |
| 968 | int a_ioflag; |
| 969 | kauth_cred_t a_cred; |
| 970 | } */ *ap = v; |
| 971 | |
| 972 | /* |
| 973 | * Set access flag. |
| 974 | */ |
| 975 | if ((ap->a_vp->v_mount->mnt_flag & MNT_NODEVMTIME) == 0) |
| 976 | VTOI(ap->a_vp)->i_flag |= IN_ACCESS; |
| 977 | return (VOCALL (spec_vnodeop_p, VOFFSET(vop_read), ap)); |
| 978 | } |
| 979 | |
| 980 | /* |
| 981 | * Write wrapper for special devices. |
| 982 | */ |
| 983 | int |
| 984 | ulfsspec_write(void *v) |
| 985 | { |
| 986 | struct vop_write_args /* { |
| 987 | struct vnode *a_vp; |
| 988 | struct uio *a_uio; |
| 989 | int a_ioflag; |
| 990 | kauth_cred_t a_cred; |
| 991 | } */ *ap = v; |
| 992 | |
| 993 | /* |
| 994 | * Set update and change flags. |
| 995 | */ |
| 996 | if ((ap->a_vp->v_mount->mnt_flag & MNT_NODEVMTIME) == 0) |
| 997 | VTOI(ap->a_vp)->i_flag |= IN_MODIFY; |
| 998 | return (VOCALL (spec_vnodeop_p, VOFFSET(vop_write), ap)); |
| 999 | } |
| 1000 | |
| 1001 | /* |
| 1002 | * Read wrapper for fifo's |
| 1003 | */ |
| 1004 | int |
| 1005 | ulfsfifo_read(void *v) |
| 1006 | { |
| 1007 | struct vop_read_args /* { |
| 1008 | struct vnode *a_vp; |
| 1009 | struct uio *a_uio; |
| 1010 | int a_ioflag; |
| 1011 | kauth_cred_t a_cred; |
| 1012 | } */ *ap = v; |
| 1013 | |
| 1014 | /* |
| 1015 | * Set access flag. |
| 1016 | */ |
| 1017 | VTOI(ap->a_vp)->i_flag |= IN_ACCESS; |
| 1018 | return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_read), ap)); |
| 1019 | } |
| 1020 | |
| 1021 | /* |
| 1022 | * Write wrapper for fifo's. |
| 1023 | */ |
| 1024 | int |
| 1025 | ulfsfifo_write(void *v) |
| 1026 | { |
| 1027 | struct vop_write_args /* { |
| 1028 | struct vnode *a_vp; |
| 1029 | struct uio *a_uio; |
| 1030 | int a_ioflag; |
| 1031 | kauth_cred_t a_cred; |
| 1032 | } */ *ap = v; |
| 1033 | |
| 1034 | /* |
| 1035 | * Set update and change flags. |
| 1036 | */ |
| 1037 | VTOI(ap->a_vp)->i_flag |= IN_MODIFY; |
| 1038 | return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_write), ap)); |
| 1039 | } |
| 1040 | |
| 1041 | /* |
| 1042 | * Return POSIX pathconf information applicable to ulfs filesystems. |
| 1043 | */ |
| 1044 | int |
| 1045 | ulfs_pathconf(void *v) |
| 1046 | { |
| 1047 | struct vop_pathconf_args /* { |
| 1048 | struct vnode *a_vp; |
| 1049 | int a_name; |
| 1050 | register_t *a_retval; |
| 1051 | } */ *ap = v; |
| 1052 | |
| 1053 | switch (ap->a_name) { |
| 1054 | case _PC_LINK_MAX: |
| 1055 | *ap->a_retval = LINK_MAX; |
| 1056 | return (0); |
| 1057 | case _PC_NAME_MAX: |
| 1058 | *ap->a_retval = LFS_MAXNAMLEN; |
| 1059 | return (0); |
| 1060 | case _PC_PATH_MAX: |
| 1061 | *ap->a_retval = PATH_MAX; |
| 1062 | return (0); |
| 1063 | case _PC_PIPE_BUF: |
| 1064 | *ap->a_retval = PIPE_BUF; |
| 1065 | return (0); |
| 1066 | case _PC_CHOWN_RESTRICTED: |
| 1067 | *ap->a_retval = 1; |
| 1068 | return (0); |
| 1069 | case _PC_NO_TRUNC: |
| 1070 | *ap->a_retval = 1; |
| 1071 | return (0); |
| 1072 | case _PC_SYNC_IO: |
| 1073 | *ap->a_retval = 1; |
| 1074 | return (0); |
| 1075 | case _PC_FILESIZEBITS: |
| 1076 | *ap->a_retval = 42; |
| 1077 | return (0); |
| 1078 | case _PC_SYMLINK_MAX: |
| 1079 | *ap->a_retval = MAXPATHLEN; |
| 1080 | return (0); |
| 1081 | case _PC_2_SYMLINKS: |
| 1082 | *ap->a_retval = 1; |
| 1083 | return (0); |
| 1084 | default: |
| 1085 | return (EINVAL); |
| 1086 | } |
| 1087 | /* NOTREACHED */ |
| 1088 | } |
| 1089 | |
| 1090 | /* |
| 1091 | * Advisory record locking support |
| 1092 | */ |
| 1093 | int |
| 1094 | ulfs_advlock(void *v) |
| 1095 | { |
| 1096 | struct vop_advlock_args /* { |
| 1097 | struct vnode *a_vp; |
| 1098 | void * a_id; |
| 1099 | int a_op; |
| 1100 | struct flock *a_fl; |
| 1101 | int a_flags; |
| 1102 | } */ *ap = v; |
| 1103 | struct inode *ip; |
| 1104 | |
| 1105 | ip = VTOI(ap->a_vp); |
| 1106 | return lf_advlock(ap, &ip->i_lockf, ip->i_size); |
| 1107 | } |
| 1108 | |
| 1109 | /* |
| 1110 | * Initialize the vnode associated with a new inode, handle aliased |
| 1111 | * vnodes. |
| 1112 | */ |
| 1113 | void |
| 1114 | ulfs_vinit(struct mount *mntp, int (**specops)(void *), int (**fifoops)(void *), |
| 1115 | struct vnode **vpp) |
| 1116 | { |
| 1117 | struct timeval tv; |
| 1118 | struct inode *ip; |
| 1119 | struct vnode *vp; |
| 1120 | dev_t rdev; |
| 1121 | struct ulfsmount *ump; |
| 1122 | |
| 1123 | vp = *vpp; |
| 1124 | ip = VTOI(vp); |
| 1125 | switch(vp->v_type = IFTOVT(ip->i_mode)) { |
| 1126 | case VCHR: |
| 1127 | case VBLK: |
| 1128 | vp->v_op = specops; |
| 1129 | ump = ip->i_ump; |
| 1130 | // XXX clean this up |
| 1131 | if (ump->um_fstype == ULFS1) |
| 1132 | rdev = (dev_t)ulfs_rw32(ip->i_din->u_32.di_rdev, |
| 1133 | ULFS_MPNEEDSWAP(ump->um_lfs)); |
| 1134 | else |
| 1135 | rdev = (dev_t)ulfs_rw64(ip->i_din->u_64.di_rdev, |
| 1136 | ULFS_MPNEEDSWAP(ump->um_lfs)); |
| 1137 | spec_node_init(vp, rdev); |
| 1138 | break; |
| 1139 | case VFIFO: |
| 1140 | vp->v_op = fifoops; |
| 1141 | break; |
| 1142 | case VNON: |
| 1143 | case VBAD: |
| 1144 | case VSOCK: |
| 1145 | case VLNK: |
| 1146 | case VDIR: |
| 1147 | case VREG: |
| 1148 | break; |
| 1149 | } |
| 1150 | if (ip->i_number == ULFS_ROOTINO) |
| 1151 | vp->v_vflag |= VV_ROOT; |
| 1152 | /* |
| 1153 | * Initialize modrev times |
| 1154 | */ |
| 1155 | getmicrouptime(&tv); |
| 1156 | ip->i_modrev = (uint64_t)(uint)tv.tv_sec << 32 |
| 1157 | | tv.tv_usec * 4294u; |
| 1158 | *vpp = vp; |
| 1159 | } |
| 1160 | |
| 1161 | /* |
| 1162 | * Allocate len bytes at offset off. |
| 1163 | */ |
| 1164 | int |
| 1165 | ulfs_gop_alloc(struct vnode *vp, off_t off, off_t len, int flags, |
| 1166 | kauth_cred_t cred) |
| 1167 | { |
| 1168 | struct inode *ip = VTOI(vp); |
| 1169 | int error, delta, bshift, bsize; |
| 1170 | UVMHIST_FUNC("ulfs_gop_alloc" ); UVMHIST_CALLED(ubchist); |
| 1171 | |
| 1172 | error = 0; |
| 1173 | bshift = vp->v_mount->mnt_fs_bshift; |
| 1174 | bsize = 1 << bshift; |
| 1175 | |
| 1176 | delta = off & (bsize - 1); |
| 1177 | off -= delta; |
| 1178 | len += delta; |
| 1179 | |
| 1180 | while (len > 0) { |
| 1181 | bsize = MIN(bsize, len); |
| 1182 | |
| 1183 | error = lfs_balloc(vp, off, bsize, cred, flags, NULL); |
| 1184 | if (error) { |
| 1185 | goto out; |
| 1186 | } |
| 1187 | |
| 1188 | /* |
| 1189 | * increase file size now, lfs_balloc() requires that |
| 1190 | * EOF be up-to-date before each call. |
| 1191 | */ |
| 1192 | |
| 1193 | if (ip->i_size < off + bsize) { |
| 1194 | UVMHIST_LOG(ubchist, "vp %p old 0x%x new 0x%x" , |
| 1195 | vp, ip->i_size, off + bsize, 0); |
| 1196 | ip->i_size = off + bsize; |
| 1197 | DIP_ASSIGN(ip, size, ip->i_size); |
| 1198 | } |
| 1199 | |
| 1200 | off += bsize; |
| 1201 | len -= bsize; |
| 1202 | } |
| 1203 | |
| 1204 | out: |
| 1205 | return error; |
| 1206 | } |
| 1207 | |
| 1208 | void |
| 1209 | ulfs_gop_markupdate(struct vnode *vp, int flags) |
| 1210 | { |
| 1211 | u_int32_t mask = 0; |
| 1212 | |
| 1213 | if ((flags & GOP_UPDATE_ACCESSED) != 0) { |
| 1214 | mask = IN_ACCESS; |
| 1215 | } |
| 1216 | if ((flags & GOP_UPDATE_MODIFIED) != 0) { |
| 1217 | if (vp->v_type == VREG) { |
| 1218 | mask |= IN_CHANGE | IN_UPDATE; |
| 1219 | } else { |
| 1220 | mask |= IN_MODIFY; |
| 1221 | } |
| 1222 | } |
| 1223 | if (mask) { |
| 1224 | struct inode *ip = VTOI(vp); |
| 1225 | |
| 1226 | ip->i_flag |= mask; |
| 1227 | } |
| 1228 | } |
| 1229 | |
| 1230 | int |
| 1231 | ulfs_bufio(enum uio_rw rw, struct vnode *vp, void *buf, size_t len, off_t off, |
| 1232 | int ioflg, kauth_cred_t cred, size_t *aresid, struct lwp *l) |
| 1233 | { |
| 1234 | struct iovec iov; |
| 1235 | struct uio uio; |
| 1236 | int error; |
| 1237 | |
| 1238 | KASSERT(ISSET(ioflg, IO_NODELOCKED)); |
| 1239 | KASSERT(VOP_ISLOCKED(vp)); |
| 1240 | KASSERT(rw != UIO_WRITE || VOP_ISLOCKED(vp) == LK_EXCLUSIVE); |
| 1241 | |
| 1242 | iov.iov_base = buf; |
| 1243 | iov.iov_len = len; |
| 1244 | uio.uio_iov = &iov; |
| 1245 | uio.uio_iovcnt = 1; |
| 1246 | uio.uio_resid = len; |
| 1247 | uio.uio_offset = off; |
| 1248 | uio.uio_rw = rw; |
| 1249 | UIO_SETUP_SYSSPACE(&uio); |
| 1250 | |
| 1251 | switch (rw) { |
| 1252 | case UIO_READ: |
| 1253 | error = lfs_bufrd(vp, &uio, ioflg, cred); |
| 1254 | break; |
| 1255 | case UIO_WRITE: |
| 1256 | error = lfs_bufwr(vp, &uio, ioflg, cred); |
| 1257 | break; |
| 1258 | default: |
| 1259 | panic("invalid uio rw: %d" , (int)rw); |
| 1260 | } |
| 1261 | |
| 1262 | if (aresid) |
| 1263 | *aresid = uio.uio_resid; |
| 1264 | else if (uio.uio_resid && error == 0) |
| 1265 | error = EIO; |
| 1266 | |
| 1267 | KASSERT(VOP_ISLOCKED(vp)); |
| 1268 | KASSERT(rw != UIO_WRITE || VOP_ISLOCKED(vp) == LK_EXCLUSIVE); |
| 1269 | return error; |
| 1270 | } |
| 1271 | |