| 1 | /* $NetBSD: ufs_vnops.c,v 1.234 2016/11/09 04:12:55 dholland Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2008 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Wasabi Systems, Inc. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | /* |
| 33 | * Copyright (c) 1982, 1986, 1989, 1993, 1995 |
| 34 | * The Regents of the University of California. All rights reserved. |
| 35 | * (c) UNIX System Laboratories, Inc. |
| 36 | * All or some portions of this file are derived from material licensed |
| 37 | * to the University of California by American Telephone and Telegraph |
| 38 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
| 39 | * the permission of UNIX System Laboratories, Inc. |
| 40 | * |
| 41 | * Redistribution and use in source and binary forms, with or without |
| 42 | * modification, are permitted provided that the following conditions |
| 43 | * are met: |
| 44 | * 1. Redistributions of source code must retain the above copyright |
| 45 | * notice, this list of conditions and the following disclaimer. |
| 46 | * 2. Redistributions in binary form must reproduce the above copyright |
| 47 | * notice, this list of conditions and the following disclaimer in the |
| 48 | * documentation and/or other materials provided with the distribution. |
| 49 | * 3. Neither the name of the University nor the names of its contributors |
| 50 | * may be used to endorse or promote products derived from this software |
| 51 | * without specific prior written permission. |
| 52 | * |
| 53 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 54 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 55 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 56 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 57 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 58 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 59 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 60 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 61 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 62 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 63 | * SUCH DAMAGE. |
| 64 | * |
| 65 | * @(#)ufs_vnops.c 8.28 (Berkeley) 7/31/95 |
| 66 | */ |
| 67 | |
| 68 | #include <sys/cdefs.h> |
| 69 | __KERNEL_RCSID(0, "$NetBSD: ufs_vnops.c,v 1.234 2016/11/09 04:12:55 dholland Exp $" ); |
| 70 | |
| 71 | #if defined(_KERNEL_OPT) |
| 72 | #include "opt_ffs.h" |
| 73 | #include "opt_quota.h" |
| 74 | #endif |
| 75 | |
| 76 | #include <sys/param.h> |
| 77 | #include <sys/systm.h> |
| 78 | #include <sys/namei.h> |
| 79 | #include <sys/resourcevar.h> |
| 80 | #include <sys/kernel.h> |
| 81 | #include <sys/file.h> |
| 82 | #include <sys/stat.h> |
| 83 | #include <sys/buf.h> |
| 84 | #include <sys/proc.h> |
| 85 | #include <sys/mount.h> |
| 86 | #include <sys/vnode.h> |
| 87 | #include <sys/kmem.h> |
| 88 | #include <sys/malloc.h> |
| 89 | #include <sys/dirent.h> |
| 90 | #include <sys/lockf.h> |
| 91 | #include <sys/kauth.h> |
| 92 | #include <sys/wapbl.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/ufs/inode.h> |
| 100 | #include <ufs/ufs/dir.h> |
| 101 | #include <ufs/ufs/ufsmount.h> |
| 102 | #include <ufs/ufs/ufs_bswap.h> |
| 103 | #include <ufs/ufs/ufs_extern.h> |
| 104 | #include <ufs/ufs/ufs_wapbl.h> |
| 105 | #ifdef UFS_DIRHASH |
| 106 | #include <ufs/ufs/dirhash.h> |
| 107 | #endif |
| 108 | #include <ufs/ext2fs/ext2fs_extern.h> |
| 109 | #include <ufs/ext2fs/ext2fs_dir.h> |
| 110 | #include <ufs/ffs/ffs_extern.h> |
| 111 | #include <ufs/lfs/lfs_extern.h> |
| 112 | #include <ufs/lfs/lfs.h> |
| 113 | |
| 114 | #include <uvm/uvm.h> |
| 115 | |
| 116 | __CTASSERT(EXT2FS_MAXNAMLEN == FFS_MAXNAMLEN); |
| 117 | __CTASSERT(LFS_MAXNAMLEN == FFS_MAXNAMLEN); |
| 118 | |
| 119 | static int ufs_chmod(struct vnode *, int, kauth_cred_t, struct lwp *); |
| 120 | static int ufs_chown(struct vnode *, uid_t, gid_t, kauth_cred_t, |
| 121 | struct lwp *); |
| 122 | static int ufs_makeinode(struct vattr *, struct vnode *, |
| 123 | const struct ufs_lookup_results *, struct vnode **, struct componentname *); |
| 124 | |
| 125 | /* |
| 126 | * A virgin directory (no blushing please). |
| 127 | */ |
| 128 | static const struct dirtemplate mastertemplate = { |
| 129 | 0, 12, DT_DIR, 1, "." , |
| 130 | 0, UFS_DIRBLKSIZ - 12, DT_DIR, 2, ".." |
| 131 | }; |
| 132 | |
| 133 | /* |
| 134 | * Create a regular file |
| 135 | */ |
| 136 | int |
| 137 | ufs_create(void *v) |
| 138 | { |
| 139 | struct vop_create_v3_args /* { |
| 140 | struct vnode *a_dvp; |
| 141 | struct vnode **a_vpp; |
| 142 | struct componentname *a_cnp; |
| 143 | struct vattr *a_vap; |
| 144 | } */ *ap = v; |
| 145 | int error; |
| 146 | struct vnode *dvp = ap->a_dvp; |
| 147 | struct ufs_lookup_results *ulr; |
| 148 | |
| 149 | /* XXX should handle this material another way */ |
| 150 | ulr = &VTOI(dvp)->i_crap; |
| 151 | UFS_CHECK_CRAPCOUNTER(VTOI(dvp)); |
| 152 | |
| 153 | /* |
| 154 | * UFS_WAPBL_BEGIN(dvp->v_mount) performed by successful |
| 155 | * ufs_makeinode |
| 156 | */ |
| 157 | fstrans_start(dvp->v_mount, FSTRANS_SHARED); |
| 158 | error = ufs_makeinode(ap->a_vap, dvp, ulr, ap->a_vpp, ap->a_cnp); |
| 159 | if (error) { |
| 160 | fstrans_done(dvp->v_mount); |
| 161 | return (error); |
| 162 | } |
| 163 | UFS_WAPBL_END(dvp->v_mount); |
| 164 | fstrans_done(dvp->v_mount); |
| 165 | VN_KNOTE(dvp, NOTE_WRITE); |
| 166 | VOP_UNLOCK(*ap->a_vpp); |
| 167 | return (0); |
| 168 | } |
| 169 | |
| 170 | /* |
| 171 | * Mknod vnode call |
| 172 | */ |
| 173 | /* ARGSUSED */ |
| 174 | int |
| 175 | ufs_mknod(void *v) |
| 176 | { |
| 177 | struct vop_mknod_v3_args /* { |
| 178 | struct vnode *a_dvp; |
| 179 | struct vnode **a_vpp; |
| 180 | struct componentname *a_cnp; |
| 181 | struct vattr *a_vap; |
| 182 | } */ *ap = v; |
| 183 | struct vattr *vap; |
| 184 | struct vnode **vpp; |
| 185 | struct inode *ip; |
| 186 | int error; |
| 187 | struct ufs_lookup_results *ulr; |
| 188 | |
| 189 | vap = ap->a_vap; |
| 190 | vpp = ap->a_vpp; |
| 191 | |
| 192 | /* XXX should handle this material another way */ |
| 193 | ulr = &VTOI(ap->a_dvp)->i_crap; |
| 194 | UFS_CHECK_CRAPCOUNTER(VTOI(ap->a_dvp)); |
| 195 | |
| 196 | /* |
| 197 | * UFS_WAPBL_BEGIN(dvp->v_mount) performed by successful |
| 198 | * ufs_makeinode |
| 199 | */ |
| 200 | fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); |
| 201 | if ((error = ufs_makeinode(vap, ap->a_dvp, ulr, vpp, ap->a_cnp)) != 0) |
| 202 | goto out; |
| 203 | VN_KNOTE(ap->a_dvp, NOTE_WRITE); |
| 204 | ip = VTOI(*vpp); |
| 205 | ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; |
| 206 | UFS_WAPBL_UPDATE(*vpp, NULL, NULL, 0); |
| 207 | UFS_WAPBL_END(ap->a_dvp->v_mount); |
| 208 | VOP_UNLOCK(*vpp); |
| 209 | out: |
| 210 | fstrans_done(ap->a_dvp->v_mount); |
| 211 | if (error != 0) { |
| 212 | *vpp = NULL; |
| 213 | return (error); |
| 214 | } |
| 215 | return (0); |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * Open called. |
| 220 | * |
| 221 | * Nothing to do. |
| 222 | */ |
| 223 | /* ARGSUSED */ |
| 224 | int |
| 225 | ufs_open(void *v) |
| 226 | { |
| 227 | struct vop_open_args /* { |
| 228 | struct vnode *a_vp; |
| 229 | int a_mode; |
| 230 | kauth_cred_t a_cred; |
| 231 | } */ *ap = v; |
| 232 | |
| 233 | /* |
| 234 | * Files marked append-only must be opened for appending. |
| 235 | */ |
| 236 | if ((VTOI(ap->a_vp)->i_flags & APPEND) && |
| 237 | (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) |
| 238 | return (EPERM); |
| 239 | return (0); |
| 240 | } |
| 241 | |
| 242 | /* |
| 243 | * Close called. |
| 244 | * |
| 245 | * Update the times on the inode. |
| 246 | */ |
| 247 | /* ARGSUSED */ |
| 248 | int |
| 249 | ufs_close(void *v) |
| 250 | { |
| 251 | struct vop_close_args /* { |
| 252 | struct vnode *a_vp; |
| 253 | int a_fflag; |
| 254 | kauth_cred_t a_cred; |
| 255 | } */ *ap = v; |
| 256 | struct vnode *vp; |
| 257 | |
| 258 | vp = ap->a_vp; |
| 259 | fstrans_start(vp->v_mount, FSTRANS_SHARED); |
| 260 | if (vp->v_usecount > 1) |
| 261 | UFS_ITIMES(vp, NULL, NULL, NULL); |
| 262 | fstrans_done(vp->v_mount); |
| 263 | return (0); |
| 264 | } |
| 265 | |
| 266 | static int |
| 267 | ufs_check_possible(struct vnode *vp, struct inode *ip, mode_t mode, |
| 268 | kauth_cred_t cred) |
| 269 | { |
| 270 | #if defined(QUOTA) || defined(QUOTA2) |
| 271 | int error; |
| 272 | #endif |
| 273 | |
| 274 | /* |
| 275 | * Disallow write attempts on read-only file systems; |
| 276 | * unless the file is a socket, fifo, or a block or |
| 277 | * character device resident on the file system. |
| 278 | */ |
| 279 | if (mode & VWRITE) { |
| 280 | switch (vp->v_type) { |
| 281 | case VDIR: |
| 282 | case VLNK: |
| 283 | case VREG: |
| 284 | if (vp->v_mount->mnt_flag & MNT_RDONLY) |
| 285 | return (EROFS); |
| 286 | #if defined(QUOTA) || defined(QUOTA2) |
| 287 | fstrans_start(vp->v_mount, FSTRANS_SHARED); |
| 288 | error = chkdq(ip, 0, cred, 0); |
| 289 | fstrans_done(vp->v_mount); |
| 290 | if (error != 0) |
| 291 | return error; |
| 292 | #endif |
| 293 | break; |
| 294 | case VBAD: |
| 295 | case VBLK: |
| 296 | case VCHR: |
| 297 | case VSOCK: |
| 298 | case VFIFO: |
| 299 | case VNON: |
| 300 | default: |
| 301 | break; |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | /* If it is a snapshot, nobody gets access to it. */ |
| 306 | if ((ip->i_flags & SF_SNAPSHOT)) |
| 307 | return (EPERM); |
| 308 | /* If immutable bit set, nobody gets to write it. */ |
| 309 | if ((mode & VWRITE) && (ip->i_flags & IMMUTABLE)) |
| 310 | return (EPERM); |
| 311 | |
| 312 | return 0; |
| 313 | } |
| 314 | |
| 315 | static int |
| 316 | ufs_check_permitted(struct vnode *vp, struct inode *ip, mode_t mode, |
| 317 | kauth_cred_t cred) |
| 318 | { |
| 319 | |
| 320 | return kauth_authorize_vnode(cred, KAUTH_ACCESS_ACTION(mode, vp->v_type, |
| 321 | ip->i_mode & ALLPERMS), vp, NULL, genfs_can_access(vp->v_type, |
| 322 | ip->i_mode & ALLPERMS, ip->i_uid, ip->i_gid, mode, cred)); |
| 323 | } |
| 324 | |
| 325 | int |
| 326 | ufs_access(void *v) |
| 327 | { |
| 328 | struct vop_access_args /* { |
| 329 | struct vnode *a_vp; |
| 330 | int a_mode; |
| 331 | kauth_cred_t a_cred; |
| 332 | } */ *ap = v; |
| 333 | struct vnode *vp; |
| 334 | struct inode *ip; |
| 335 | mode_t mode; |
| 336 | int error; |
| 337 | |
| 338 | vp = ap->a_vp; |
| 339 | ip = VTOI(vp); |
| 340 | mode = ap->a_mode; |
| 341 | |
| 342 | error = ufs_check_possible(vp, ip, mode, ap->a_cred); |
| 343 | if (error) |
| 344 | return error; |
| 345 | |
| 346 | error = ufs_check_permitted(vp, ip, mode, ap->a_cred); |
| 347 | |
| 348 | return error; |
| 349 | } |
| 350 | |
| 351 | /* ARGSUSED */ |
| 352 | int |
| 353 | ufs_getattr(void *v) |
| 354 | { |
| 355 | struct vop_getattr_args /* { |
| 356 | struct vnode *a_vp; |
| 357 | struct vattr *a_vap; |
| 358 | kauth_cred_t a_cred; |
| 359 | } */ *ap = v; |
| 360 | struct vnode *vp; |
| 361 | struct inode *ip; |
| 362 | struct vattr *vap; |
| 363 | |
| 364 | vp = ap->a_vp; |
| 365 | ip = VTOI(vp); |
| 366 | vap = ap->a_vap; |
| 367 | fstrans_start(vp->v_mount, FSTRANS_SHARED); |
| 368 | UFS_ITIMES(vp, NULL, NULL, NULL); |
| 369 | |
| 370 | /* |
| 371 | * Copy from inode table |
| 372 | */ |
| 373 | vap->va_fsid = ip->i_dev; |
| 374 | vap->va_fileid = ip->i_number; |
| 375 | vap->va_mode = ip->i_mode & ALLPERMS; |
| 376 | vap->va_nlink = ip->i_nlink; |
| 377 | vap->va_uid = ip->i_uid; |
| 378 | vap->va_gid = ip->i_gid; |
| 379 | vap->va_size = vp->v_size; |
| 380 | if (ip->i_ump->um_fstype == UFS1) { |
| 381 | switch (vp->v_type) { |
| 382 | case VBLK: |
| 383 | case VCHR: |
| 384 | vap->va_rdev = (dev_t)ufs_rw32(ip->i_ffs1_rdev, |
| 385 | UFS_MPNEEDSWAP(ip->i_ump)); |
| 386 | break; |
| 387 | default: |
| 388 | vap->va_rdev = NODEV; |
| 389 | break; |
| 390 | } |
| 391 | vap->va_atime.tv_sec = ip->i_ffs1_atime; |
| 392 | vap->va_atime.tv_nsec = ip->i_ffs1_atimensec; |
| 393 | vap->va_mtime.tv_sec = ip->i_ffs1_mtime; |
| 394 | vap->va_mtime.tv_nsec = ip->i_ffs1_mtimensec; |
| 395 | vap->va_ctime.tv_sec = ip->i_ffs1_ctime; |
| 396 | vap->va_ctime.tv_nsec = ip->i_ffs1_ctimensec; |
| 397 | vap->va_birthtime.tv_sec = 0; |
| 398 | vap->va_birthtime.tv_nsec = 0; |
| 399 | vap->va_bytes = dbtob((u_quad_t)ip->i_ffs1_blocks); |
| 400 | } else { |
| 401 | switch (vp->v_type) { |
| 402 | case VBLK: |
| 403 | case VCHR: |
| 404 | vap->va_rdev = (dev_t)ufs_rw64(ip->i_ffs2_rdev, |
| 405 | UFS_MPNEEDSWAP(ip->i_ump)); |
| 406 | break; |
| 407 | default: |
| 408 | vap->va_rdev = NODEV; |
| 409 | break; |
| 410 | } |
| 411 | vap->va_atime.tv_sec = ip->i_ffs2_atime; |
| 412 | vap->va_atime.tv_nsec = ip->i_ffs2_atimensec; |
| 413 | vap->va_mtime.tv_sec = ip->i_ffs2_mtime; |
| 414 | vap->va_mtime.tv_nsec = ip->i_ffs2_mtimensec; |
| 415 | vap->va_ctime.tv_sec = ip->i_ffs2_ctime; |
| 416 | vap->va_ctime.tv_nsec = ip->i_ffs2_ctimensec; |
| 417 | vap->va_birthtime.tv_sec = ip->i_ffs2_birthtime; |
| 418 | vap->va_birthtime.tv_nsec = ip->i_ffs2_birthnsec; |
| 419 | vap->va_bytes = dbtob(ip->i_ffs2_blocks); |
| 420 | } |
| 421 | vap->va_gen = ip->i_gen; |
| 422 | vap->va_flags = ip->i_flags; |
| 423 | |
| 424 | /* this doesn't belong here */ |
| 425 | if (vp->v_type == VBLK) |
| 426 | vap->va_blocksize = BLKDEV_IOSIZE; |
| 427 | else if (vp->v_type == VCHR) |
| 428 | vap->va_blocksize = MAXBSIZE; |
| 429 | else |
| 430 | vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; |
| 431 | vap->va_type = vp->v_type; |
| 432 | vap->va_filerev = ip->i_modrev; |
| 433 | fstrans_done(vp->v_mount); |
| 434 | return (0); |
| 435 | } |
| 436 | |
| 437 | /* |
| 438 | * Set attribute vnode op. called from several syscalls |
| 439 | */ |
| 440 | int |
| 441 | ufs_setattr(void *v) |
| 442 | { |
| 443 | struct vop_setattr_args /* { |
| 444 | struct vnode *a_vp; |
| 445 | struct vattr *a_vap; |
| 446 | kauth_cred_t a_cred; |
| 447 | } */ *ap = v; |
| 448 | struct vattr *vap; |
| 449 | struct vnode *vp; |
| 450 | struct inode *ip; |
| 451 | kauth_cred_t cred; |
| 452 | struct lwp *l; |
| 453 | int error; |
| 454 | kauth_action_t action; |
| 455 | bool changing_sysflags; |
| 456 | |
| 457 | vap = ap->a_vap; |
| 458 | vp = ap->a_vp; |
| 459 | ip = VTOI(vp); |
| 460 | cred = ap->a_cred; |
| 461 | l = curlwp; |
| 462 | action = KAUTH_VNODE_WRITE_FLAGS; |
| 463 | changing_sysflags = false; |
| 464 | |
| 465 | /* |
| 466 | * Check for unsettable attributes. |
| 467 | */ |
| 468 | if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || |
| 469 | (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || |
| 470 | (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || |
| 471 | ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { |
| 472 | return (EINVAL); |
| 473 | } |
| 474 | |
| 475 | UFS_WAPBL_JUNLOCK_ASSERT(vp->v_mount); |
| 476 | |
| 477 | fstrans_start(vp->v_mount, FSTRANS_SHARED); |
| 478 | |
| 479 | if (vap->va_flags != VNOVAL) { |
| 480 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 481 | error = EROFS; |
| 482 | goto out; |
| 483 | } |
| 484 | |
| 485 | /* Snapshot flag cannot be set or cleared */ |
| 486 | if ((vap->va_flags & (SF_SNAPSHOT | SF_SNAPINVAL)) != |
| 487 | (ip->i_flags & (SF_SNAPSHOT | SF_SNAPINVAL))) { |
| 488 | error = EPERM; |
| 489 | goto out; |
| 490 | } |
| 491 | |
| 492 | if (ip->i_flags & (SF_IMMUTABLE | SF_APPEND)) { |
| 493 | action |= KAUTH_VNODE_HAS_SYSFLAGS; |
| 494 | } |
| 495 | |
| 496 | if ((vap->va_flags & SF_SETTABLE) != |
| 497 | (ip->i_flags & SF_SETTABLE)) { |
| 498 | action |= KAUTH_VNODE_WRITE_SYSFLAGS; |
| 499 | changing_sysflags = true; |
| 500 | } |
| 501 | |
| 502 | error = kauth_authorize_vnode(cred, action, vp, NULL, |
| 503 | genfs_can_chflags(cred, vp->v_type, ip->i_uid, |
| 504 | changing_sysflags)); |
| 505 | if (error) |
| 506 | goto out; |
| 507 | |
| 508 | if (changing_sysflags) { |
| 509 | error = UFS_WAPBL_BEGIN(vp->v_mount); |
| 510 | if (error) |
| 511 | goto out; |
| 512 | ip->i_flags = vap->va_flags; |
| 513 | DIP_ASSIGN(ip, flags, ip->i_flags); |
| 514 | } else { |
| 515 | error = UFS_WAPBL_BEGIN(vp->v_mount); |
| 516 | if (error) |
| 517 | goto out; |
| 518 | ip->i_flags &= SF_SETTABLE; |
| 519 | ip->i_flags |= (vap->va_flags & UF_SETTABLE); |
| 520 | DIP_ASSIGN(ip, flags, ip->i_flags); |
| 521 | } |
| 522 | ip->i_flag |= IN_CHANGE; |
| 523 | UFS_WAPBL_UPDATE(vp, NULL, NULL, 0); |
| 524 | UFS_WAPBL_END(vp->v_mount); |
| 525 | if (vap->va_flags & (IMMUTABLE | APPEND)) { |
| 526 | error = 0; |
| 527 | goto out; |
| 528 | } |
| 529 | } |
| 530 | if (ip->i_flags & (IMMUTABLE | APPEND)) { |
| 531 | error = EPERM; |
| 532 | goto out; |
| 533 | } |
| 534 | /* |
| 535 | * Go through the fields and update iff not VNOVAL. |
| 536 | */ |
| 537 | if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { |
| 538 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 539 | error = EROFS; |
| 540 | goto out; |
| 541 | } |
| 542 | error = UFS_WAPBL_BEGIN(vp->v_mount); |
| 543 | if (error) |
| 544 | goto out; |
| 545 | error = ufs_chown(vp, vap->va_uid, vap->va_gid, cred, l); |
| 546 | UFS_WAPBL_END(vp->v_mount); |
| 547 | if (error) |
| 548 | goto out; |
| 549 | } |
| 550 | if (vap->va_size != VNOVAL) { |
| 551 | /* |
| 552 | * Disallow write attempts on read-only file systems; |
| 553 | * unless the file is a socket, fifo, or a block or |
| 554 | * character device resident on the file system. |
| 555 | */ |
| 556 | switch (vp->v_type) { |
| 557 | case VDIR: |
| 558 | error = EISDIR; |
| 559 | goto out; |
| 560 | case VCHR: |
| 561 | case VBLK: |
| 562 | case VFIFO: |
| 563 | break; |
| 564 | case VREG: |
| 565 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 566 | error = EROFS; |
| 567 | goto out; |
| 568 | } |
| 569 | if ((ip->i_flags & SF_SNAPSHOT) != 0) { |
| 570 | error = EPERM; |
| 571 | goto out; |
| 572 | } |
| 573 | error = ufs_truncate_retry(vp, vap->va_size, cred); |
| 574 | if (error) |
| 575 | goto out; |
| 576 | break; |
| 577 | default: |
| 578 | error = EOPNOTSUPP; |
| 579 | goto out; |
| 580 | } |
| 581 | } |
| 582 | ip = VTOI(vp); |
| 583 | if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL || |
| 584 | vap->va_birthtime.tv_sec != VNOVAL) { |
| 585 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 586 | error = EROFS; |
| 587 | goto out; |
| 588 | } |
| 589 | if ((ip->i_flags & SF_SNAPSHOT) != 0) { |
| 590 | error = EPERM; |
| 591 | goto out; |
| 592 | } |
| 593 | error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_TIMES, vp, |
| 594 | NULL, genfs_can_chtimes(vp, vap->va_vaflags, ip->i_uid, cred)); |
| 595 | if (error) |
| 596 | goto out; |
| 597 | error = UFS_WAPBL_BEGIN(vp->v_mount); |
| 598 | if (error) |
| 599 | goto out; |
| 600 | if (vap->va_atime.tv_sec != VNOVAL) |
| 601 | if (!(vp->v_mount->mnt_flag & MNT_NOATIME)) |
| 602 | ip->i_flag |= IN_ACCESS; |
| 603 | if (vap->va_mtime.tv_sec != VNOVAL) { |
| 604 | ip->i_flag |= IN_CHANGE | IN_UPDATE; |
| 605 | if (vp->v_mount->mnt_flag & MNT_RELATIME) |
| 606 | ip->i_flag |= IN_ACCESS; |
| 607 | } |
| 608 | if (vap->va_birthtime.tv_sec != VNOVAL && |
| 609 | ip->i_ump->um_fstype == UFS2) { |
| 610 | ip->i_ffs2_birthtime = vap->va_birthtime.tv_sec; |
| 611 | ip->i_ffs2_birthnsec = vap->va_birthtime.tv_nsec; |
| 612 | } |
| 613 | error = UFS_UPDATE(vp, &vap->va_atime, &vap->va_mtime, 0); |
| 614 | UFS_WAPBL_END(vp->v_mount); |
| 615 | if (error) |
| 616 | goto out; |
| 617 | } |
| 618 | error = 0; |
| 619 | if (vap->va_mode != (mode_t)VNOVAL) { |
| 620 | if (vp->v_mount->mnt_flag & MNT_RDONLY) { |
| 621 | error = EROFS; |
| 622 | goto out; |
| 623 | } |
| 624 | if ((ip->i_flags & SF_SNAPSHOT) != 0 && |
| 625 | (vap->va_mode & (S_IXUSR | S_IWUSR | S_IXGRP | S_IWGRP | |
| 626 | S_IXOTH | S_IWOTH))) { |
| 627 | error = EPERM; |
| 628 | goto out; |
| 629 | } |
| 630 | error = UFS_WAPBL_BEGIN(vp->v_mount); |
| 631 | if (error) |
| 632 | goto out; |
| 633 | error = ufs_chmod(vp, (int)vap->va_mode, cred, l); |
| 634 | UFS_WAPBL_END(vp->v_mount); |
| 635 | } |
| 636 | VN_KNOTE(vp, NOTE_ATTRIB); |
| 637 | out: |
| 638 | fstrans_done(vp->v_mount); |
| 639 | return (error); |
| 640 | } |
| 641 | |
| 642 | /* |
| 643 | * Change the mode on a file. |
| 644 | * Inode must be locked before calling. |
| 645 | */ |
| 646 | static int |
| 647 | ufs_chmod(struct vnode *vp, int mode, kauth_cred_t cred, struct lwp *l) |
| 648 | { |
| 649 | struct inode *ip; |
| 650 | int error; |
| 651 | |
| 652 | UFS_WAPBL_JLOCK_ASSERT(vp->v_mount); |
| 653 | |
| 654 | ip = VTOI(vp); |
| 655 | |
| 656 | error = kauth_authorize_vnode(cred, KAUTH_VNODE_WRITE_SECURITY, vp, |
| 657 | NULL, genfs_can_chmod(vp->v_type, cred, ip->i_uid, ip->i_gid, mode)); |
| 658 | if (error) |
| 659 | return (error); |
| 660 | |
| 661 | fstrans_start(vp->v_mount, FSTRANS_SHARED); |
| 662 | ip->i_mode &= ~ALLPERMS; |
| 663 | ip->i_mode |= (mode & ALLPERMS); |
| 664 | ip->i_flag |= IN_CHANGE; |
| 665 | DIP_ASSIGN(ip, mode, ip->i_mode); |
| 666 | UFS_WAPBL_UPDATE(vp, NULL, NULL, 0); |
| 667 | fstrans_done(vp->v_mount); |
| 668 | return (0); |
| 669 | } |
| 670 | |
| 671 | /* |
| 672 | * Perform chown operation on inode ip; |
| 673 | * inode must be locked prior to call. |
| 674 | */ |
| 675 | static int |
| 676 | ufs_chown(struct vnode *vp, uid_t uid, gid_t gid, kauth_cred_t cred, |
| 677 | struct lwp *l) |
| 678 | { |
| 679 | struct inode *ip; |
| 680 | int error = 0; |
| 681 | #if defined(QUOTA) || defined(QUOTA2) |
| 682 | uid_t ouid; |
| 683 | gid_t ogid; |
| 684 | int64_t change; |
| 685 | #endif |
| 686 | ip = VTOI(vp); |
| 687 | error = 0; |
| 688 | |
| 689 | if (uid == (uid_t)VNOVAL) |
| 690 | uid = ip->i_uid; |
| 691 | if (gid == (gid_t)VNOVAL) |
| 692 | gid = ip->i_gid; |
| 693 | |
| 694 | error = kauth_authorize_vnode(cred, KAUTH_VNODE_CHANGE_OWNERSHIP, vp, |
| 695 | NULL, genfs_can_chown(cred, ip->i_uid, ip->i_gid, uid, gid)); |
| 696 | if (error) |
| 697 | return (error); |
| 698 | |
| 699 | fstrans_start(vp->v_mount, FSTRANS_SHARED); |
| 700 | #if defined(QUOTA) || defined(QUOTA2) |
| 701 | ogid = ip->i_gid; |
| 702 | ouid = ip->i_uid; |
| 703 | change = DIP(ip, blocks); |
| 704 | (void) chkdq(ip, -change, cred, 0); |
| 705 | (void) chkiq(ip, -1, cred, 0); |
| 706 | #endif |
| 707 | ip->i_gid = gid; |
| 708 | DIP_ASSIGN(ip, gid, gid); |
| 709 | ip->i_uid = uid; |
| 710 | DIP_ASSIGN(ip, uid, uid); |
| 711 | #if defined(QUOTA) || defined(QUOTA2) |
| 712 | if ((error = chkdq(ip, change, cred, 0)) == 0) { |
| 713 | if ((error = chkiq(ip, 1, cred, 0)) == 0) |
| 714 | goto good; |
| 715 | else |
| 716 | (void) chkdq(ip, -change, cred, FORCE); |
| 717 | } |
| 718 | ip->i_gid = ogid; |
| 719 | DIP_ASSIGN(ip, gid, ogid); |
| 720 | ip->i_uid = ouid; |
| 721 | DIP_ASSIGN(ip, uid, ouid); |
| 722 | (void) chkdq(ip, change, cred, FORCE); |
| 723 | (void) chkiq(ip, 1, cred, FORCE); |
| 724 | fstrans_done(vp->v_mount); |
| 725 | return (error); |
| 726 | good: |
| 727 | #endif /* QUOTA || QUOTA2 */ |
| 728 | ip->i_flag |= IN_CHANGE; |
| 729 | UFS_WAPBL_UPDATE(vp, NULL, NULL, 0); |
| 730 | fstrans_done(vp->v_mount); |
| 731 | return (0); |
| 732 | } |
| 733 | |
| 734 | int |
| 735 | ufs_remove(void *v) |
| 736 | { |
| 737 | struct vop_remove_args /* { |
| 738 | struct vnode *a_dvp; |
| 739 | struct vnode *a_vp; |
| 740 | struct componentname *a_cnp; |
| 741 | } */ *ap = v; |
| 742 | struct vnode *vp, *dvp; |
| 743 | struct inode *ip; |
| 744 | struct mount *mp; |
| 745 | int error; |
| 746 | struct ufs_lookup_results *ulr; |
| 747 | |
| 748 | vp = ap->a_vp; |
| 749 | dvp = ap->a_dvp; |
| 750 | ip = VTOI(vp); |
| 751 | mp = dvp->v_mount; |
| 752 | KASSERT(mp == vp->v_mount); /* XXX Not stable without lock. */ |
| 753 | |
| 754 | /* XXX should handle this material another way */ |
| 755 | ulr = &VTOI(dvp)->i_crap; |
| 756 | UFS_CHECK_CRAPCOUNTER(VTOI(dvp)); |
| 757 | |
| 758 | fstrans_start(mp, FSTRANS_SHARED); |
| 759 | if (vp->v_type == VDIR || (ip->i_flags & (IMMUTABLE | APPEND)) || |
| 760 | (VTOI(dvp)->i_flags & APPEND)) |
| 761 | error = EPERM; |
| 762 | else { |
| 763 | error = UFS_WAPBL_BEGIN(mp); |
| 764 | if (error == 0) { |
| 765 | error = ufs_dirremove(dvp, ulr, |
| 766 | ip, ap->a_cnp->cn_flags, 0); |
| 767 | UFS_WAPBL_END(mp); |
| 768 | } |
| 769 | } |
| 770 | VN_KNOTE(vp, NOTE_DELETE); |
| 771 | VN_KNOTE(dvp, NOTE_WRITE); |
| 772 | if (dvp == vp) |
| 773 | vrele(vp); |
| 774 | else |
| 775 | vput(vp); |
| 776 | vput(dvp); |
| 777 | fstrans_done(mp); |
| 778 | return (error); |
| 779 | } |
| 780 | |
| 781 | /* |
| 782 | * ufs_link: create hard link. |
| 783 | */ |
| 784 | int |
| 785 | ufs_link(void *v) |
| 786 | { |
| 787 | struct vop_link_v2_args /* { |
| 788 | struct vnode *a_dvp; |
| 789 | struct vnode *a_vp; |
| 790 | struct componentname *a_cnp; |
| 791 | } */ *ap = v; |
| 792 | struct vnode *dvp = ap->a_dvp; |
| 793 | struct vnode *vp = ap->a_vp; |
| 794 | struct componentname *cnp = ap->a_cnp; |
| 795 | struct mount *mp = dvp->v_mount; |
| 796 | struct inode *ip; |
| 797 | struct direct *newdir; |
| 798 | int error; |
| 799 | struct ufs_lookup_results *ulr; |
| 800 | |
| 801 | KASSERT(dvp != vp); |
| 802 | KASSERT(vp->v_type != VDIR); |
| 803 | KASSERT(mp == vp->v_mount); /* XXX Not stable without lock. */ |
| 804 | |
| 805 | /* XXX should handle this material another way */ |
| 806 | ulr = &VTOI(dvp)->i_crap; |
| 807 | UFS_CHECK_CRAPCOUNTER(VTOI(dvp)); |
| 808 | |
| 809 | fstrans_start(mp, FSTRANS_SHARED); |
| 810 | error = vn_lock(vp, LK_EXCLUSIVE); |
| 811 | if (error) { |
| 812 | VOP_ABORTOP(dvp, cnp); |
| 813 | goto out2; |
| 814 | } |
| 815 | ip = VTOI(vp); |
| 816 | if ((nlink_t)ip->i_nlink >= LINK_MAX) { |
| 817 | VOP_ABORTOP(dvp, cnp); |
| 818 | error = EMLINK; |
| 819 | goto out1; |
| 820 | } |
| 821 | if (ip->i_flags & (IMMUTABLE | APPEND)) { |
| 822 | VOP_ABORTOP(dvp, cnp); |
| 823 | error = EPERM; |
| 824 | goto out1; |
| 825 | } |
| 826 | error = UFS_WAPBL_BEGIN(mp); |
| 827 | if (error) { |
| 828 | VOP_ABORTOP(dvp, cnp); |
| 829 | goto out1; |
| 830 | } |
| 831 | ip->i_nlink++; |
| 832 | DIP_ASSIGN(ip, nlink, ip->i_nlink); |
| 833 | ip->i_flag |= IN_CHANGE; |
| 834 | error = UFS_UPDATE(vp, NULL, NULL, UPDATE_DIROP); |
| 835 | if (!error) { |
| 836 | newdir = pool_cache_get(ufs_direct_cache, PR_WAITOK); |
| 837 | ufs_makedirentry(ip, cnp, newdir); |
| 838 | error = ufs_direnter(dvp, ulr, vp, newdir, cnp, NULL); |
| 839 | pool_cache_put(ufs_direct_cache, newdir); |
| 840 | } |
| 841 | if (error) { |
| 842 | ip->i_nlink--; |
| 843 | DIP_ASSIGN(ip, nlink, ip->i_nlink); |
| 844 | ip->i_flag |= IN_CHANGE; |
| 845 | UFS_WAPBL_UPDATE(vp, NULL, NULL, UPDATE_DIROP); |
| 846 | } |
| 847 | UFS_WAPBL_END(mp); |
| 848 | out1: |
| 849 | VOP_UNLOCK(vp); |
| 850 | out2: |
| 851 | VN_KNOTE(vp, NOTE_LINK); |
| 852 | VN_KNOTE(dvp, NOTE_WRITE); |
| 853 | fstrans_done(mp); |
| 854 | return (error); |
| 855 | } |
| 856 | |
| 857 | /* |
| 858 | * whiteout vnode call |
| 859 | */ |
| 860 | int |
| 861 | ufs_whiteout(void *v) |
| 862 | { |
| 863 | struct vop_whiteout_args /* { |
| 864 | struct vnode *a_dvp; |
| 865 | struct componentname *a_cnp; |
| 866 | int a_flags; |
| 867 | } */ *ap = v; |
| 868 | struct vnode *dvp = ap->a_dvp; |
| 869 | struct componentname *cnp = ap->a_cnp; |
| 870 | struct direct *newdir; |
| 871 | int error; |
| 872 | struct ufsmount *ump = VFSTOUFS(dvp->v_mount); |
| 873 | struct ufs_lookup_results *ulr; |
| 874 | |
| 875 | /* XXX should handle this material another way */ |
| 876 | ulr = &VTOI(dvp)->i_crap; |
| 877 | UFS_CHECK_CRAPCOUNTER(VTOI(dvp)); |
| 878 | |
| 879 | error = 0; |
| 880 | switch (ap->a_flags) { |
| 881 | case LOOKUP: |
| 882 | /* 4.4 format directories support whiteout operations */ |
| 883 | if (ump->um_maxsymlinklen > 0) |
| 884 | return (0); |
| 885 | return (EOPNOTSUPP); |
| 886 | |
| 887 | case CREATE: |
| 888 | /* create a new directory whiteout */ |
| 889 | fstrans_start(dvp->v_mount, FSTRANS_SHARED); |
| 890 | error = UFS_WAPBL_BEGIN(dvp->v_mount); |
| 891 | if (error) |
| 892 | break; |
| 893 | #ifdef DIAGNOSTIC |
| 894 | if (ump->um_maxsymlinklen <= 0) |
| 895 | panic("ufs_whiteout: old format filesystem" ); |
| 896 | #endif |
| 897 | |
| 898 | newdir = pool_cache_get(ufs_direct_cache, PR_WAITOK); |
| 899 | newdir->d_ino = UFS_WINO; |
| 900 | newdir->d_namlen = cnp->cn_namelen; |
| 901 | memcpy(newdir->d_name, cnp->cn_nameptr, |
| 902 | (size_t)cnp->cn_namelen); |
| 903 | newdir->d_name[cnp->cn_namelen] = '\0'; |
| 904 | newdir->d_type = DT_WHT; |
| 905 | error = ufs_direnter(dvp, ulr, NULL, newdir, cnp, NULL); |
| 906 | pool_cache_put(ufs_direct_cache, newdir); |
| 907 | break; |
| 908 | |
| 909 | case DELETE: |
| 910 | /* remove an existing directory whiteout */ |
| 911 | fstrans_start(dvp->v_mount, FSTRANS_SHARED); |
| 912 | error = UFS_WAPBL_BEGIN(dvp->v_mount); |
| 913 | if (error) |
| 914 | break; |
| 915 | #ifdef DIAGNOSTIC |
| 916 | if (ump->um_maxsymlinklen <= 0) |
| 917 | panic("ufs_whiteout: old format filesystem" ); |
| 918 | #endif |
| 919 | |
| 920 | cnp->cn_flags &= ~DOWHITEOUT; |
| 921 | error = ufs_dirremove(dvp, ulr, NULL, cnp->cn_flags, 0); |
| 922 | break; |
| 923 | default: |
| 924 | panic("ufs_whiteout: unknown op" ); |
| 925 | /* NOTREACHED */ |
| 926 | } |
| 927 | UFS_WAPBL_END(dvp->v_mount); |
| 928 | fstrans_done(dvp->v_mount); |
| 929 | return (error); |
| 930 | } |
| 931 | |
| 932 | int |
| 933 | ufs_mkdir(void *v) |
| 934 | { |
| 935 | struct vop_mkdir_v3_args /* { |
| 936 | struct vnode *a_dvp; |
| 937 | struct vnode **a_vpp; |
| 938 | struct componentname *a_cnp; |
| 939 | struct vattr *a_vap; |
| 940 | } */ *ap = v; |
| 941 | struct vnode *dvp = ap->a_dvp, *tvp; |
| 942 | struct vattr *vap = ap->a_vap; |
| 943 | struct componentname *cnp = ap->a_cnp; |
| 944 | struct inode *ip, *dp = VTOI(dvp); |
| 945 | struct buf *bp; |
| 946 | struct dirtemplate dirtemplate; |
| 947 | struct direct *newdir; |
| 948 | int error; |
| 949 | struct ufsmount *ump = dp->i_ump; |
| 950 | int dirblksiz = ump->um_dirblksiz; |
| 951 | struct ufs_lookup_results *ulr; |
| 952 | |
| 953 | fstrans_start(dvp->v_mount, FSTRANS_SHARED); |
| 954 | |
| 955 | /* XXX should handle this material another way */ |
| 956 | ulr = &dp->i_crap; |
| 957 | UFS_CHECK_CRAPCOUNTER(dp); |
| 958 | |
| 959 | KASSERT(vap->va_type == VDIR); |
| 960 | |
| 961 | if ((nlink_t)dp->i_nlink >= LINK_MAX) { |
| 962 | error = EMLINK; |
| 963 | goto out; |
| 964 | } |
| 965 | /* |
| 966 | * Must simulate part of ufs_makeinode here to acquire the inode, |
| 967 | * but not have it entered in the parent directory. The entry is |
| 968 | * made later after writing "." and ".." entries. |
| 969 | */ |
| 970 | error = vcache_new(dvp->v_mount, dvp, vap, cnp->cn_cred, ap->a_vpp); |
| 971 | if (error) |
| 972 | goto out; |
| 973 | error = vn_lock(*ap->a_vpp, LK_EXCLUSIVE); |
| 974 | if (error) { |
| 975 | vrele(*ap->a_vpp); |
| 976 | *ap->a_vpp = NULL; |
| 977 | goto out; |
| 978 | } |
| 979 | error = UFS_WAPBL_BEGIN(ap->a_dvp->v_mount); |
| 980 | if (error) { |
| 981 | vput(*ap->a_vpp); |
| 982 | goto out; |
| 983 | } |
| 984 | |
| 985 | tvp = *ap->a_vpp; |
| 986 | ip = VTOI(tvp); |
| 987 | ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; |
| 988 | ip->i_nlink = 2; |
| 989 | DIP_ASSIGN(ip, nlink, 2); |
| 990 | if (cnp->cn_flags & ISWHITEOUT) { |
| 991 | ip->i_flags |= UF_OPAQUE; |
| 992 | DIP_ASSIGN(ip, flags, ip->i_flags); |
| 993 | } |
| 994 | |
| 995 | /* |
| 996 | * Bump link count in parent directory to reflect work done below. |
| 997 | * Should be done before reference is created so cleanup is |
| 998 | * possible if we crash. |
| 999 | */ |
| 1000 | dp->i_nlink++; |
| 1001 | DIP_ASSIGN(dp, nlink, dp->i_nlink); |
| 1002 | dp->i_flag |= IN_CHANGE; |
| 1003 | if ((error = UFS_UPDATE(dvp, NULL, NULL, UPDATE_DIROP)) != 0) |
| 1004 | goto bad; |
| 1005 | |
| 1006 | /* |
| 1007 | * Initialize directory with "." and ".." from static template. |
| 1008 | */ |
| 1009 | dirtemplate = mastertemplate; |
| 1010 | dirtemplate.dotdot_reclen = dirblksiz - dirtemplate.dot_reclen; |
| 1011 | dirtemplate.dot_ino = ufs_rw32(ip->i_number, UFS_MPNEEDSWAP(ump)); |
| 1012 | dirtemplate.dotdot_ino = ufs_rw32(dp->i_number, UFS_MPNEEDSWAP(ump)); |
| 1013 | dirtemplate.dot_reclen = ufs_rw16(dirtemplate.dot_reclen, |
| 1014 | UFS_MPNEEDSWAP(ump)); |
| 1015 | dirtemplate.dotdot_reclen = ufs_rw16(dirtemplate.dotdot_reclen, |
| 1016 | UFS_MPNEEDSWAP(ump)); |
| 1017 | if (ump->um_maxsymlinklen <= 0) { |
| 1018 | #if BYTE_ORDER == LITTLE_ENDIAN |
| 1019 | if (UFS_MPNEEDSWAP(ump) == 0) |
| 1020 | #else |
| 1021 | if (UFS_MPNEEDSWAP(ump) != 0) |
| 1022 | #endif |
| 1023 | { |
| 1024 | dirtemplate.dot_type = dirtemplate.dot_namlen; |
| 1025 | dirtemplate.dotdot_type = dirtemplate.dotdot_namlen; |
| 1026 | dirtemplate.dot_namlen = dirtemplate.dotdot_namlen = 0; |
| 1027 | } else |
| 1028 | dirtemplate.dot_type = dirtemplate.dotdot_type = 0; |
| 1029 | } |
| 1030 | if ((error = UFS_BALLOC(tvp, (off_t)0, dirblksiz, cnp->cn_cred, |
| 1031 | B_CLRBUF, &bp)) != 0) |
| 1032 | goto bad; |
| 1033 | ip->i_size = dirblksiz; |
| 1034 | DIP_ASSIGN(ip, size, dirblksiz); |
| 1035 | ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; |
| 1036 | uvm_vnp_setsize(tvp, ip->i_size); |
| 1037 | memcpy((void *)bp->b_data, (void *)&dirtemplate, sizeof dirtemplate); |
| 1038 | |
| 1039 | /* |
| 1040 | * Directory set up, now install its entry in the parent directory. |
| 1041 | * We must write out the buffer containing the new directory body |
| 1042 | * before entering the new name in the parent. |
| 1043 | */ |
| 1044 | if ((error = VOP_BWRITE(bp->b_vp, bp)) != 0) |
| 1045 | goto bad; |
| 1046 | if ((error = UFS_UPDATE(tvp, NULL, NULL, UPDATE_DIROP)) != 0) { |
| 1047 | goto bad; |
| 1048 | } |
| 1049 | newdir = pool_cache_get(ufs_direct_cache, PR_WAITOK); |
| 1050 | ufs_makedirentry(ip, cnp, newdir); |
| 1051 | error = ufs_direnter(dvp, ulr, tvp, newdir, cnp, bp); |
| 1052 | pool_cache_put(ufs_direct_cache, newdir); |
| 1053 | bad: |
| 1054 | if (error == 0) { |
| 1055 | VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); |
| 1056 | VOP_UNLOCK(tvp); |
| 1057 | UFS_WAPBL_END(dvp->v_mount); |
| 1058 | } else { |
| 1059 | dp->i_nlink--; |
| 1060 | DIP_ASSIGN(dp, nlink, dp->i_nlink); |
| 1061 | dp->i_flag |= IN_CHANGE; |
| 1062 | UFS_WAPBL_UPDATE(dvp, NULL, NULL, UPDATE_DIROP); |
| 1063 | /* |
| 1064 | * No need to do an explicit UFS_TRUNCATE here, vrele will |
| 1065 | * do this for us because we set the link count to 0. |
| 1066 | */ |
| 1067 | ip->i_nlink = 0; |
| 1068 | DIP_ASSIGN(ip, nlink, 0); |
| 1069 | ip->i_flag |= IN_CHANGE; |
| 1070 | UFS_WAPBL_UPDATE(tvp, NULL, NULL, UPDATE_DIROP); |
| 1071 | UFS_WAPBL_END(dvp->v_mount); |
| 1072 | vput(tvp); |
| 1073 | } |
| 1074 | out: |
| 1075 | fstrans_done(dvp->v_mount); |
| 1076 | return (error); |
| 1077 | } |
| 1078 | |
| 1079 | int |
| 1080 | ufs_rmdir(void *v) |
| 1081 | { |
| 1082 | struct vop_rmdir_args /* { |
| 1083 | struct vnode *a_dvp; |
| 1084 | struct vnode *a_vp; |
| 1085 | struct componentname *a_cnp; |
| 1086 | } */ *ap = v; |
| 1087 | struct vnode *vp, *dvp; |
| 1088 | struct componentname *cnp; |
| 1089 | struct inode *ip, *dp; |
| 1090 | int error; |
| 1091 | struct ufs_lookup_results *ulr; |
| 1092 | |
| 1093 | vp = ap->a_vp; |
| 1094 | dvp = ap->a_dvp; |
| 1095 | cnp = ap->a_cnp; |
| 1096 | ip = VTOI(vp); |
| 1097 | dp = VTOI(dvp); |
| 1098 | |
| 1099 | /* XXX should handle this material another way */ |
| 1100 | ulr = &dp->i_crap; |
| 1101 | UFS_CHECK_CRAPCOUNTER(dp); |
| 1102 | |
| 1103 | /* |
| 1104 | * No rmdir "." or of mounted directories please. |
| 1105 | */ |
| 1106 | if (dp == ip || vp->v_mountedhere != NULL) { |
| 1107 | if (dp == ip) |
| 1108 | vrele(dvp); |
| 1109 | else |
| 1110 | vput(dvp); |
| 1111 | vput(vp); |
| 1112 | return (EINVAL); |
| 1113 | } |
| 1114 | |
| 1115 | fstrans_start(dvp->v_mount, FSTRANS_SHARED); |
| 1116 | |
| 1117 | /* |
| 1118 | * Do not remove a directory that is in the process of being renamed. |
| 1119 | * Verify that the directory is empty (and valid). (Rmdir ".." won't |
| 1120 | * be valid since ".." will contain a reference to the current |
| 1121 | * directory and thus be non-empty.) |
| 1122 | */ |
| 1123 | error = 0; |
| 1124 | if (ip->i_nlink != 2 || |
| 1125 | !ufs_dirempty(ip, dp->i_number, cnp->cn_cred)) { |
| 1126 | error = ENOTEMPTY; |
| 1127 | goto out; |
| 1128 | } |
| 1129 | if ((dp->i_flags & APPEND) || |
| 1130 | (ip->i_flags & (IMMUTABLE | APPEND))) { |
| 1131 | error = EPERM; |
| 1132 | goto out; |
| 1133 | } |
| 1134 | error = UFS_WAPBL_BEGIN(dvp->v_mount); |
| 1135 | if (error) |
| 1136 | goto out; |
| 1137 | /* |
| 1138 | * Delete reference to directory before purging |
| 1139 | * inode. If we crash in between, the directory |
| 1140 | * will be reattached to lost+found, |
| 1141 | */ |
| 1142 | error = ufs_dirremove(dvp, ulr, ip, cnp->cn_flags, 1); |
| 1143 | if (error) { |
| 1144 | UFS_WAPBL_END(dvp->v_mount); |
| 1145 | goto out; |
| 1146 | } |
| 1147 | VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); |
| 1148 | cache_purge(dvp); |
| 1149 | /* |
| 1150 | * Truncate inode. The only stuff left in the directory is "." and |
| 1151 | * "..". The "." reference is inconsequential since we're quashing |
| 1152 | * it. |
| 1153 | */ |
| 1154 | dp->i_nlink--; |
| 1155 | DIP_ASSIGN(dp, nlink, dp->i_nlink); |
| 1156 | dp->i_flag |= IN_CHANGE; |
| 1157 | UFS_WAPBL_UPDATE(dvp, NULL, NULL, UPDATE_DIROP); |
| 1158 | ip->i_nlink--; |
| 1159 | DIP_ASSIGN(ip, nlink, ip->i_nlink); |
| 1160 | ip->i_flag |= IN_CHANGE; |
| 1161 | (void) UFS_TRUNCATE(vp, (off_t)0, IO_SYNC, cnp->cn_cred); |
| 1162 | cache_purge(vp); |
| 1163 | /* |
| 1164 | * Unlock the log while we still have reference to unlinked |
| 1165 | * directory vp so that it will not get locked for recycling |
| 1166 | */ |
| 1167 | UFS_WAPBL_END(dvp->v_mount); |
| 1168 | #ifdef UFS_DIRHASH |
| 1169 | if (ip->i_dirhash != NULL) |
| 1170 | ufsdirhash_free(ip); |
| 1171 | #endif |
| 1172 | out: |
| 1173 | VN_KNOTE(vp, NOTE_DELETE); |
| 1174 | vput(vp); |
| 1175 | fstrans_done(dvp->v_mount); |
| 1176 | vput(dvp); |
| 1177 | return (error); |
| 1178 | } |
| 1179 | |
| 1180 | /* |
| 1181 | * symlink -- make a symbolic link |
| 1182 | */ |
| 1183 | int |
| 1184 | ufs_symlink(void *v) |
| 1185 | { |
| 1186 | struct vop_symlink_v3_args /* { |
| 1187 | struct vnode *a_dvp; |
| 1188 | struct vnode **a_vpp; |
| 1189 | struct componentname *a_cnp; |
| 1190 | struct vattr *a_vap; |
| 1191 | char *a_target; |
| 1192 | } */ *ap = v; |
| 1193 | struct vnode *vp, **vpp; |
| 1194 | struct inode *ip; |
| 1195 | int len, error; |
| 1196 | struct ufs_lookup_results *ulr; |
| 1197 | |
| 1198 | vpp = ap->a_vpp; |
| 1199 | |
| 1200 | /* XXX should handle this material another way */ |
| 1201 | ulr = &VTOI(ap->a_dvp)->i_crap; |
| 1202 | UFS_CHECK_CRAPCOUNTER(VTOI(ap->a_dvp)); |
| 1203 | |
| 1204 | /* |
| 1205 | * UFS_WAPBL_BEGIN(dvp->v_mount) performed by successful |
| 1206 | * ufs_makeinode |
| 1207 | */ |
| 1208 | fstrans_start(ap->a_dvp->v_mount, FSTRANS_SHARED); |
| 1209 | KASSERT(ap->a_vap->va_type == VLNK); |
| 1210 | error = ufs_makeinode(ap->a_vap, ap->a_dvp, ulr, vpp, ap->a_cnp); |
| 1211 | if (error) |
| 1212 | goto out; |
| 1213 | VN_KNOTE(ap->a_dvp, NOTE_WRITE); |
| 1214 | vp = *vpp; |
| 1215 | len = strlen(ap->a_target); |
| 1216 | ip = VTOI(vp); |
| 1217 | /* |
| 1218 | * This test is off by one. um_maxsymlinklen contains the |
| 1219 | * number of bytes available, and we aren't storing a \0, so |
| 1220 | * the test should properly be <=. However, it cannot be |
| 1221 | * changed as this would break compatibility with existing fs |
| 1222 | * images -- see the way ufs_readlink() works. |
| 1223 | */ |
| 1224 | if (len < ip->i_ump->um_maxsymlinklen) { |
| 1225 | memcpy((char *)SHORTLINK(ip), ap->a_target, len); |
| 1226 | ip->i_size = len; |
| 1227 | DIP_ASSIGN(ip, size, len); |
| 1228 | uvm_vnp_setsize(vp, ip->i_size); |
| 1229 | ip->i_flag |= IN_CHANGE | IN_UPDATE; |
| 1230 | if (vp->v_mount->mnt_flag & MNT_RELATIME) |
| 1231 | ip->i_flag |= IN_ACCESS; |
| 1232 | UFS_WAPBL_UPDATE(vp, NULL, NULL, 0); |
| 1233 | } else |
| 1234 | error = ufs_bufio(UIO_WRITE, vp, ap->a_target, len, (off_t)0, |
| 1235 | IO_NODELOCKED | IO_JOURNALLOCKED, ap->a_cnp->cn_cred, NULL, |
| 1236 | NULL); |
| 1237 | UFS_WAPBL_END(ap->a_dvp->v_mount); |
| 1238 | VOP_UNLOCK(vp); |
| 1239 | if (error) |
| 1240 | vrele(vp); |
| 1241 | out: |
| 1242 | fstrans_done(ap->a_dvp->v_mount); |
| 1243 | return (error); |
| 1244 | } |
| 1245 | |
| 1246 | /* |
| 1247 | * Vnode op for reading directories. |
| 1248 | * |
| 1249 | * This routine handles converting from the on-disk directory format |
| 1250 | * "struct direct" to the in-memory format "struct dirent" as well as |
| 1251 | * byte swapping the entries if necessary. |
| 1252 | */ |
| 1253 | int |
| 1254 | ufs_readdir(void *v) |
| 1255 | { |
| 1256 | struct vop_readdir_args /* { |
| 1257 | struct vnode *a_vp; |
| 1258 | struct uio *a_uio; |
| 1259 | kauth_cred_t a_cred; |
| 1260 | int *a_eofflag; |
| 1261 | off_t **a_cookies; |
| 1262 | int *ncookies; |
| 1263 | } */ *ap = v; |
| 1264 | struct vnode *vp = ap->a_vp; |
| 1265 | struct direct *cdp, *ecdp; |
| 1266 | struct dirent *ndp; |
| 1267 | char *cdbuf, *ndbuf, *endp; |
| 1268 | struct uio auio, *uio; |
| 1269 | struct iovec aiov; |
| 1270 | int error; |
| 1271 | size_t count, ccount, rcount, cdbufsz, ndbufsz; |
| 1272 | off_t off, *ccp; |
| 1273 | off_t startoff; |
| 1274 | size_t skipbytes; |
| 1275 | struct ufsmount *ump = VFSTOUFS(vp->v_mount); |
| 1276 | int nswap = UFS_MPNEEDSWAP(ump); |
| 1277 | #if BYTE_ORDER == LITTLE_ENDIAN |
| 1278 | int needswap = ump->um_maxsymlinklen <= 0 && nswap == 0; |
| 1279 | #else |
| 1280 | int needswap = ump->um_maxsymlinklen <= 0 && nswap != 0; |
| 1281 | #endif |
| 1282 | uio = ap->a_uio; |
| 1283 | count = uio->uio_resid; |
| 1284 | rcount = count - ((uio->uio_offset + count) & (ump->um_dirblksiz - 1)); |
| 1285 | |
| 1286 | if (rcount < _DIRENT_MINSIZE(cdp) || count < _DIRENT_MINSIZE(ndp)) |
| 1287 | return EINVAL; |
| 1288 | |
| 1289 | startoff = uio->uio_offset & ~(ump->um_dirblksiz - 1); |
| 1290 | skipbytes = uio->uio_offset - startoff; |
| 1291 | rcount += skipbytes; |
| 1292 | |
| 1293 | auio.uio_iov = &aiov; |
| 1294 | auio.uio_iovcnt = 1; |
| 1295 | auio.uio_offset = startoff; |
| 1296 | auio.uio_resid = rcount; |
| 1297 | UIO_SETUP_SYSSPACE(&auio); |
| 1298 | auio.uio_rw = UIO_READ; |
| 1299 | cdbufsz = rcount; |
| 1300 | cdbuf = kmem_alloc(cdbufsz, KM_SLEEP); |
| 1301 | aiov.iov_base = cdbuf; |
| 1302 | aiov.iov_len = rcount; |
| 1303 | error = UFS_BUFRD(vp, &auio, 0, ap->a_cred); |
| 1304 | if (error != 0) { |
| 1305 | kmem_free(cdbuf, cdbufsz); |
| 1306 | return error; |
| 1307 | } |
| 1308 | |
| 1309 | rcount -= auio.uio_resid; |
| 1310 | |
| 1311 | cdp = (struct direct *)(void *)cdbuf; |
| 1312 | ecdp = (struct direct *)(void *)&cdbuf[rcount]; |
| 1313 | |
| 1314 | ndbufsz = count; |
| 1315 | ndbuf = kmem_alloc(ndbufsz, KM_SLEEP); |
| 1316 | ndp = (struct dirent *)(void *)ndbuf; |
| 1317 | endp = &ndbuf[count]; |
| 1318 | |
| 1319 | off = uio->uio_offset; |
| 1320 | if (ap->a_cookies) { |
| 1321 | ccount = rcount / _DIRENT_RECLEN(cdp, 1); |
| 1322 | ccp = *(ap->a_cookies) = malloc(ccount * sizeof(*ccp), |
| 1323 | M_TEMP, M_WAITOK); |
| 1324 | } else { |
| 1325 | /* XXX: GCC */ |
| 1326 | ccount = 0; |
| 1327 | ccp = NULL; |
| 1328 | } |
| 1329 | |
| 1330 | while (cdp < ecdp) { |
| 1331 | cdp->d_reclen = ufs_rw16(cdp->d_reclen, nswap); |
| 1332 | if (skipbytes > 0) { |
| 1333 | if (cdp->d_reclen <= skipbytes) { |
| 1334 | skipbytes -= cdp->d_reclen; |
| 1335 | cdp = _DIRENT_NEXT(cdp); |
| 1336 | continue; |
| 1337 | } |
| 1338 | /* |
| 1339 | * invalid cookie. |
| 1340 | */ |
| 1341 | error = EINVAL; |
| 1342 | goto out; |
| 1343 | } |
| 1344 | if (cdp->d_reclen == 0) { |
| 1345 | struct dirent *ondp = ndp; |
| 1346 | ndp->d_reclen = _DIRENT_MINSIZE(ndp); |
| 1347 | ndp = _DIRENT_NEXT(ndp); |
| 1348 | ondp->d_reclen = 0; |
| 1349 | cdp = ecdp; |
| 1350 | break; |
| 1351 | } |
| 1352 | if (needswap) { |
| 1353 | ndp->d_type = cdp->d_namlen; |
| 1354 | ndp->d_namlen = cdp->d_type; |
| 1355 | } else { |
| 1356 | ndp->d_type = cdp->d_type; |
| 1357 | ndp->d_namlen = cdp->d_namlen; |
| 1358 | } |
| 1359 | ndp->d_reclen = _DIRENT_RECLEN(ndp, ndp->d_namlen); |
| 1360 | if ((char *)(void *)ndp + ndp->d_reclen + |
| 1361 | _DIRENT_MINSIZE(ndp) > endp) |
| 1362 | break; |
| 1363 | ndp->d_fileno = ufs_rw32(cdp->d_ino, nswap); |
| 1364 | (void)memcpy(ndp->d_name, cdp->d_name, ndp->d_namlen); |
| 1365 | memset(&ndp->d_name[ndp->d_namlen], 0, |
| 1366 | ndp->d_reclen - _DIRENT_NAMEOFF(ndp) - ndp->d_namlen); |
| 1367 | off += cdp->d_reclen; |
| 1368 | if (ap->a_cookies) { |
| 1369 | KASSERT(ccp - *(ap->a_cookies) < ccount); |
| 1370 | *(ccp++) = off; |
| 1371 | } |
| 1372 | ndp = _DIRENT_NEXT(ndp); |
| 1373 | cdp = _DIRENT_NEXT(cdp); |
| 1374 | } |
| 1375 | |
| 1376 | count = ((char *)(void *)ndp - ndbuf); |
| 1377 | error = uiomove(ndbuf, count, uio); |
| 1378 | out: |
| 1379 | if (ap->a_cookies) { |
| 1380 | if (error) { |
| 1381 | free(*(ap->a_cookies), M_TEMP); |
| 1382 | *(ap->a_cookies) = NULL; |
| 1383 | *(ap->a_ncookies) = 0; |
| 1384 | } else { |
| 1385 | *ap->a_ncookies = ccp - *(ap->a_cookies); |
| 1386 | } |
| 1387 | } |
| 1388 | uio->uio_offset = off; |
| 1389 | kmem_free(ndbuf, ndbufsz); |
| 1390 | kmem_free(cdbuf, cdbufsz); |
| 1391 | *ap->a_eofflag = VTOI(vp)->i_size <= uio->uio_offset; |
| 1392 | return error; |
| 1393 | } |
| 1394 | |
| 1395 | /* |
| 1396 | * Return target name of a symbolic link |
| 1397 | */ |
| 1398 | int |
| 1399 | ufs_readlink(void *v) |
| 1400 | { |
| 1401 | struct vop_readlink_args /* { |
| 1402 | struct vnode *a_vp; |
| 1403 | struct uio *a_uio; |
| 1404 | kauth_cred_t a_cred; |
| 1405 | } */ *ap = v; |
| 1406 | struct vnode *vp = ap->a_vp; |
| 1407 | struct inode *ip = VTOI(vp); |
| 1408 | struct ufsmount *ump = VFSTOUFS(vp->v_mount); |
| 1409 | int isize; |
| 1410 | |
| 1411 | /* |
| 1412 | * The test against um_maxsymlinklen is off by one; it should |
| 1413 | * theoretically be <=, not <. However, it cannot be changed |
| 1414 | * as that would break compatibility with existing fs images. |
| 1415 | */ |
| 1416 | |
| 1417 | isize = ip->i_size; |
| 1418 | if (isize < ump->um_maxsymlinklen || |
| 1419 | (ump->um_maxsymlinklen == 0 && DIP(ip, blocks) == 0)) { |
| 1420 | uiomove((char *)SHORTLINK(ip), isize, ap->a_uio); |
| 1421 | return (0); |
| 1422 | } |
| 1423 | return (UFS_BUFRD(vp, ap->a_uio, 0, ap->a_cred)); |
| 1424 | } |
| 1425 | |
| 1426 | /* |
| 1427 | * Calculate the logical to physical mapping if not done already, |
| 1428 | * then call the device strategy routine. |
| 1429 | */ |
| 1430 | int |
| 1431 | ufs_strategy(void *v) |
| 1432 | { |
| 1433 | struct vop_strategy_args /* { |
| 1434 | struct vnode *a_vp; |
| 1435 | struct buf *a_bp; |
| 1436 | } */ *ap = v; |
| 1437 | struct buf *bp; |
| 1438 | struct vnode *vp; |
| 1439 | struct inode *ip; |
| 1440 | struct mount *mp; |
| 1441 | int error; |
| 1442 | |
| 1443 | bp = ap->a_bp; |
| 1444 | vp = ap->a_vp; |
| 1445 | ip = VTOI(vp); |
| 1446 | if (vp->v_type == VBLK || vp->v_type == VCHR) |
| 1447 | panic("ufs_strategy: spec" ); |
| 1448 | KASSERT(bp->b_bcount != 0); |
| 1449 | if (bp->b_blkno == bp->b_lblkno) { |
| 1450 | error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, |
| 1451 | NULL); |
| 1452 | if (error) { |
| 1453 | bp->b_error = error; |
| 1454 | biodone(bp); |
| 1455 | return (error); |
| 1456 | } |
| 1457 | if (bp->b_blkno == -1) /* no valid data */ |
| 1458 | clrbuf(bp); |
| 1459 | } |
| 1460 | if (bp->b_blkno < 0) { /* block is not on disk */ |
| 1461 | biodone(bp); |
| 1462 | return (0); |
| 1463 | } |
| 1464 | vp = ip->i_devvp; |
| 1465 | |
| 1466 | error = VOP_STRATEGY(vp, bp); |
| 1467 | if (error) |
| 1468 | return error; |
| 1469 | |
| 1470 | if (!BUF_ISREAD(bp)) |
| 1471 | return 0; |
| 1472 | |
| 1473 | mp = wapbl_vptomp(vp); |
| 1474 | if (mp == NULL || mp->mnt_wapbl_replay == NULL || |
| 1475 | !WAPBL_REPLAY_ISOPEN(mp) || |
| 1476 | !WAPBL_REPLAY_CAN_READ(mp, bp->b_blkno, bp->b_bcount)) |
| 1477 | return 0; |
| 1478 | |
| 1479 | error = biowait(bp); |
| 1480 | if (error) |
| 1481 | return error; |
| 1482 | |
| 1483 | error = WAPBL_REPLAY_READ(mp, bp->b_data, bp->b_blkno, bp->b_bcount); |
| 1484 | if (error) { |
| 1485 | mutex_enter(&bufcache_lock); |
| 1486 | SET(bp->b_cflags, BC_INVAL); |
| 1487 | mutex_exit(&bufcache_lock); |
| 1488 | } |
| 1489 | return error; |
| 1490 | } |
| 1491 | |
| 1492 | /* |
| 1493 | * Print out the contents of an inode. |
| 1494 | */ |
| 1495 | int |
| 1496 | ufs_print(void *v) |
| 1497 | { |
| 1498 | struct vop_print_args /* { |
| 1499 | struct vnode *a_vp; |
| 1500 | } */ *ap = v; |
| 1501 | struct vnode *vp; |
| 1502 | struct inode *ip; |
| 1503 | |
| 1504 | vp = ap->a_vp; |
| 1505 | ip = VTOI(vp); |
| 1506 | printf("tag VT_UFS, ino %llu, on dev %llu, %llu" , |
| 1507 | (unsigned long long)ip->i_number, |
| 1508 | (unsigned long long)major(ip->i_dev), |
| 1509 | (unsigned long long)minor(ip->i_dev)); |
| 1510 | printf(" flags 0x%x, nlink %d\n" , |
| 1511 | ip->i_flag, ip->i_nlink); |
| 1512 | printf("\tmode 0%o, owner %d, group %d, size %qd" , |
| 1513 | ip->i_mode, ip->i_uid, ip->i_gid, |
| 1514 | (long long)ip->i_size); |
| 1515 | if (vp->v_type == VFIFO) |
| 1516 | VOCALL(fifo_vnodeop_p, VOFFSET(vop_print), v); |
| 1517 | printf("\n" ); |
| 1518 | return (0); |
| 1519 | } |
| 1520 | |
| 1521 | /* |
| 1522 | * Read wrapper for special devices. |
| 1523 | */ |
| 1524 | int |
| 1525 | ufsspec_read(void *v) |
| 1526 | { |
| 1527 | struct vop_read_args /* { |
| 1528 | struct vnode *a_vp; |
| 1529 | struct uio *a_uio; |
| 1530 | int a_ioflag; |
| 1531 | kauth_cred_t a_cred; |
| 1532 | } */ *ap = v; |
| 1533 | |
| 1534 | /* |
| 1535 | * Set access flag. |
| 1536 | */ |
| 1537 | if ((ap->a_vp->v_mount->mnt_flag & MNT_NODEVMTIME) == 0) |
| 1538 | VTOI(ap->a_vp)->i_flag |= IN_ACCESS; |
| 1539 | return (VOCALL (spec_vnodeop_p, VOFFSET(vop_read), ap)); |
| 1540 | } |
| 1541 | |
| 1542 | /* |
| 1543 | * Write wrapper for special devices. |
| 1544 | */ |
| 1545 | int |
| 1546 | ufsspec_write(void *v) |
| 1547 | { |
| 1548 | struct vop_write_args /* { |
| 1549 | struct vnode *a_vp; |
| 1550 | struct uio *a_uio; |
| 1551 | int a_ioflag; |
| 1552 | kauth_cred_t a_cred; |
| 1553 | } */ *ap = v; |
| 1554 | |
| 1555 | /* |
| 1556 | * Set update and change flags. |
| 1557 | */ |
| 1558 | if ((ap->a_vp->v_mount->mnt_flag & MNT_NODEVMTIME) == 0) |
| 1559 | VTOI(ap->a_vp)->i_flag |= IN_MODIFY; |
| 1560 | return (VOCALL (spec_vnodeop_p, VOFFSET(vop_write), ap)); |
| 1561 | } |
| 1562 | |
| 1563 | /* |
| 1564 | * Close wrapper for special devices. |
| 1565 | * |
| 1566 | * Update the times on the inode then do device close. |
| 1567 | */ |
| 1568 | int |
| 1569 | ufsspec_close(void *v) |
| 1570 | { |
| 1571 | struct vop_close_args /* { |
| 1572 | struct vnode *a_vp; |
| 1573 | int a_fflag; |
| 1574 | kauth_cred_t a_cred; |
| 1575 | } */ *ap = v; |
| 1576 | struct vnode *vp; |
| 1577 | |
| 1578 | vp = ap->a_vp; |
| 1579 | if (vp->v_usecount > 1) |
| 1580 | UFS_ITIMES(vp, NULL, NULL, NULL); |
| 1581 | return (VOCALL (spec_vnodeop_p, VOFFSET(vop_close), ap)); |
| 1582 | } |
| 1583 | |
| 1584 | /* |
| 1585 | * Read wrapper for fifo's |
| 1586 | */ |
| 1587 | int |
| 1588 | ufsfifo_read(void *v) |
| 1589 | { |
| 1590 | struct vop_read_args /* { |
| 1591 | struct vnode *a_vp; |
| 1592 | struct uio *a_uio; |
| 1593 | int a_ioflag; |
| 1594 | kauth_cred_t a_cred; |
| 1595 | } */ *ap = v; |
| 1596 | |
| 1597 | /* |
| 1598 | * Set access flag. |
| 1599 | */ |
| 1600 | VTOI(ap->a_vp)->i_flag |= IN_ACCESS; |
| 1601 | return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_read), ap)); |
| 1602 | } |
| 1603 | |
| 1604 | /* |
| 1605 | * Write wrapper for fifo's. |
| 1606 | */ |
| 1607 | int |
| 1608 | ufsfifo_write(void *v) |
| 1609 | { |
| 1610 | struct vop_write_args /* { |
| 1611 | struct vnode *a_vp; |
| 1612 | struct uio *a_uio; |
| 1613 | int a_ioflag; |
| 1614 | kauth_cred_t a_cred; |
| 1615 | } */ *ap = v; |
| 1616 | |
| 1617 | /* |
| 1618 | * Set update and change flags. |
| 1619 | */ |
| 1620 | VTOI(ap->a_vp)->i_flag |= IN_MODIFY; |
| 1621 | return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_write), ap)); |
| 1622 | } |
| 1623 | |
| 1624 | /* |
| 1625 | * Close wrapper for fifo's. |
| 1626 | * |
| 1627 | * Update the times on the inode then do device close. |
| 1628 | */ |
| 1629 | int |
| 1630 | ufsfifo_close(void *v) |
| 1631 | { |
| 1632 | struct vop_close_args /* { |
| 1633 | struct vnode *a_vp; |
| 1634 | int a_fflag; |
| 1635 | kauth_cred_t a_cred; |
| 1636 | } */ *ap = v; |
| 1637 | struct vnode *vp; |
| 1638 | |
| 1639 | vp = ap->a_vp; |
| 1640 | if (ap->a_vp->v_usecount > 1) |
| 1641 | UFS_ITIMES(vp, NULL, NULL, NULL); |
| 1642 | return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_close), ap)); |
| 1643 | } |
| 1644 | |
| 1645 | /* |
| 1646 | * Return POSIX pathconf information applicable to ufs filesystems. |
| 1647 | */ |
| 1648 | int |
| 1649 | ufs_pathconf(void *v) |
| 1650 | { |
| 1651 | struct vop_pathconf_args /* { |
| 1652 | struct vnode *a_vp; |
| 1653 | int a_name; |
| 1654 | register_t *a_retval; |
| 1655 | } */ *ap = v; |
| 1656 | |
| 1657 | switch (ap->a_name) { |
| 1658 | case _PC_LINK_MAX: |
| 1659 | *ap->a_retval = LINK_MAX; |
| 1660 | return (0); |
| 1661 | case _PC_NAME_MAX: |
| 1662 | *ap->a_retval = FFS_MAXNAMLEN; |
| 1663 | return (0); |
| 1664 | case _PC_PATH_MAX: |
| 1665 | *ap->a_retval = PATH_MAX; |
| 1666 | return (0); |
| 1667 | case _PC_PIPE_BUF: |
| 1668 | *ap->a_retval = PIPE_BUF; |
| 1669 | return (0); |
| 1670 | case _PC_CHOWN_RESTRICTED: |
| 1671 | *ap->a_retval = 1; |
| 1672 | return (0); |
| 1673 | case _PC_NO_TRUNC: |
| 1674 | *ap->a_retval = 1; |
| 1675 | return (0); |
| 1676 | case _PC_SYNC_IO: |
| 1677 | *ap->a_retval = 1; |
| 1678 | return (0); |
| 1679 | case _PC_FILESIZEBITS: |
| 1680 | *ap->a_retval = 42; |
| 1681 | return (0); |
| 1682 | case _PC_SYMLINK_MAX: |
| 1683 | *ap->a_retval = MAXPATHLEN; |
| 1684 | return (0); |
| 1685 | case _PC_2_SYMLINKS: |
| 1686 | *ap->a_retval = 1; |
| 1687 | return (0); |
| 1688 | default: |
| 1689 | return (EINVAL); |
| 1690 | } |
| 1691 | /* NOTREACHED */ |
| 1692 | } |
| 1693 | |
| 1694 | /* |
| 1695 | * Advisory record locking support |
| 1696 | */ |
| 1697 | int |
| 1698 | ufs_advlock(void *v) |
| 1699 | { |
| 1700 | struct vop_advlock_args /* { |
| 1701 | struct vnode *a_vp; |
| 1702 | void * a_id; |
| 1703 | int a_op; |
| 1704 | struct flock *a_fl; |
| 1705 | int a_flags; |
| 1706 | } */ *ap = v; |
| 1707 | struct inode *ip; |
| 1708 | |
| 1709 | ip = VTOI(ap->a_vp); |
| 1710 | return lf_advlock(ap, &ip->i_lockf, ip->i_size); |
| 1711 | } |
| 1712 | |
| 1713 | /* |
| 1714 | * Initialize the vnode associated with a new inode, handle aliased |
| 1715 | * vnodes. |
| 1716 | */ |
| 1717 | void |
| 1718 | ufs_vinit(struct mount *mntp, int (**specops)(void *), int (**fifoops)(void *), |
| 1719 | struct vnode **vpp) |
| 1720 | { |
| 1721 | struct timeval tv; |
| 1722 | struct inode *ip; |
| 1723 | struct vnode *vp; |
| 1724 | dev_t rdev; |
| 1725 | struct ufsmount *ump; |
| 1726 | |
| 1727 | vp = *vpp; |
| 1728 | ip = VTOI(vp); |
| 1729 | switch(vp->v_type = IFTOVT(ip->i_mode)) { |
| 1730 | case VCHR: |
| 1731 | case VBLK: |
| 1732 | vp->v_op = specops; |
| 1733 | ump = ip->i_ump; |
| 1734 | if (ump->um_fstype == UFS1) |
| 1735 | rdev = (dev_t)ufs_rw32(ip->i_ffs1_rdev, |
| 1736 | UFS_MPNEEDSWAP(ump)); |
| 1737 | else |
| 1738 | rdev = (dev_t)ufs_rw64(ip->i_ffs2_rdev, |
| 1739 | UFS_MPNEEDSWAP(ump)); |
| 1740 | spec_node_init(vp, rdev); |
| 1741 | break; |
| 1742 | case VFIFO: |
| 1743 | vp->v_op = fifoops; |
| 1744 | break; |
| 1745 | case VNON: |
| 1746 | case VBAD: |
| 1747 | case VSOCK: |
| 1748 | case VLNK: |
| 1749 | case VDIR: |
| 1750 | case VREG: |
| 1751 | break; |
| 1752 | } |
| 1753 | if (ip->i_number == UFS_ROOTINO) |
| 1754 | vp->v_vflag |= VV_ROOT; |
| 1755 | /* |
| 1756 | * Initialize modrev times |
| 1757 | */ |
| 1758 | getmicrouptime(&tv); |
| 1759 | ip->i_modrev = (uint64_t)(uint)tv.tv_sec << 32 |
| 1760 | | tv.tv_usec * 4294u; |
| 1761 | *vpp = vp; |
| 1762 | } |
| 1763 | |
| 1764 | /* |
| 1765 | * Allocate a new inode. |
| 1766 | */ |
| 1767 | static int |
| 1768 | ufs_makeinode(struct vattr *vap, struct vnode *dvp, |
| 1769 | const struct ufs_lookup_results *ulr, |
| 1770 | struct vnode **vpp, struct componentname *cnp) |
| 1771 | { |
| 1772 | struct inode *ip; |
| 1773 | struct direct *newdir; |
| 1774 | struct vnode *tvp; |
| 1775 | int error; |
| 1776 | |
| 1777 | UFS_WAPBL_JUNLOCK_ASSERT(dvp->v_mount); |
| 1778 | |
| 1779 | error = vcache_new(dvp->v_mount, dvp, vap, cnp->cn_cred, &tvp); |
| 1780 | if (error) |
| 1781 | return error; |
| 1782 | error = vn_lock(tvp, LK_EXCLUSIVE); |
| 1783 | if (error) { |
| 1784 | vrele(tvp); |
| 1785 | return error; |
| 1786 | } |
| 1787 | *vpp = tvp; |
| 1788 | ip = VTOI(tvp); |
| 1789 | error = UFS_WAPBL_BEGIN(dvp->v_mount); |
| 1790 | if (error) { |
| 1791 | vput(tvp); |
| 1792 | return (error); |
| 1793 | } |
| 1794 | ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; |
| 1795 | ip->i_nlink = 1; |
| 1796 | DIP_ASSIGN(ip, nlink, 1); |
| 1797 | |
| 1798 | /* Authorize setting SGID if needed. */ |
| 1799 | if (ip->i_mode & ISGID) { |
| 1800 | error = kauth_authorize_vnode(cnp->cn_cred, KAUTH_VNODE_WRITE_SECURITY, |
| 1801 | tvp, NULL, genfs_can_chmod(tvp->v_type, cnp->cn_cred, ip->i_uid, |
| 1802 | ip->i_gid, MAKEIMODE(vap->va_type, vap->va_mode))); |
| 1803 | if (error) { |
| 1804 | ip->i_mode &= ~ISGID; |
| 1805 | DIP_ASSIGN(ip, mode, ip->i_mode); |
| 1806 | } |
| 1807 | } |
| 1808 | |
| 1809 | if (cnp->cn_flags & ISWHITEOUT) { |
| 1810 | ip->i_flags |= UF_OPAQUE; |
| 1811 | DIP_ASSIGN(ip, flags, ip->i_flags); |
| 1812 | } |
| 1813 | |
| 1814 | /* |
| 1815 | * Make sure inode goes to disk before directory entry. |
| 1816 | */ |
| 1817 | if ((error = UFS_UPDATE(tvp, NULL, NULL, UPDATE_DIROP)) != 0) |
| 1818 | goto bad; |
| 1819 | newdir = pool_cache_get(ufs_direct_cache, PR_WAITOK); |
| 1820 | ufs_makedirentry(ip, cnp, newdir); |
| 1821 | error = ufs_direnter(dvp, ulr, tvp, newdir, cnp, NULL); |
| 1822 | pool_cache_put(ufs_direct_cache, newdir); |
| 1823 | if (error) |
| 1824 | goto bad; |
| 1825 | *vpp = tvp; |
| 1826 | return (0); |
| 1827 | |
| 1828 | bad: |
| 1829 | /* |
| 1830 | * Write error occurred trying to update the inode |
| 1831 | * or the directory so must deallocate the inode. |
| 1832 | */ |
| 1833 | ip->i_nlink = 0; |
| 1834 | DIP_ASSIGN(ip, nlink, 0); |
| 1835 | ip->i_flag |= IN_CHANGE; |
| 1836 | UFS_WAPBL_UPDATE(tvp, NULL, NULL, 0); |
| 1837 | UFS_WAPBL_END(dvp->v_mount); |
| 1838 | vput(tvp); |
| 1839 | return (error); |
| 1840 | } |
| 1841 | |
| 1842 | /* |
| 1843 | * Allocate len bytes at offset off. |
| 1844 | */ |
| 1845 | int |
| 1846 | ufs_gop_alloc(struct vnode *vp, off_t off, off_t len, int flags, |
| 1847 | kauth_cred_t cred) |
| 1848 | { |
| 1849 | struct inode *ip = VTOI(vp); |
| 1850 | int error, delta, bshift, bsize; |
| 1851 | UVMHIST_FUNC("ufs_gop_alloc" ); UVMHIST_CALLED(ubchist); |
| 1852 | |
| 1853 | error = 0; |
| 1854 | bshift = vp->v_mount->mnt_fs_bshift; |
| 1855 | bsize = 1 << bshift; |
| 1856 | |
| 1857 | delta = off & (bsize - 1); |
| 1858 | off -= delta; |
| 1859 | len += delta; |
| 1860 | |
| 1861 | while (len > 0) { |
| 1862 | bsize = MIN(bsize, len); |
| 1863 | |
| 1864 | error = UFS_BALLOC(vp, off, bsize, cred, flags, NULL); |
| 1865 | if (error) { |
| 1866 | goto out; |
| 1867 | } |
| 1868 | |
| 1869 | /* |
| 1870 | * increase file size now, UFS_BALLOC() requires that |
| 1871 | * EOF be up-to-date before each call. |
| 1872 | */ |
| 1873 | |
| 1874 | if (ip->i_size < off + bsize) { |
| 1875 | UVMHIST_LOG(ubchist, "vp %p old 0x%x new 0x%x" , |
| 1876 | vp, ip->i_size, off + bsize, 0); |
| 1877 | ip->i_size = off + bsize; |
| 1878 | DIP_ASSIGN(ip, size, ip->i_size); |
| 1879 | } |
| 1880 | |
| 1881 | off += bsize; |
| 1882 | len -= bsize; |
| 1883 | } |
| 1884 | |
| 1885 | out: |
| 1886 | UFS_WAPBL_UPDATE(vp, NULL, NULL, 0); |
| 1887 | return error; |
| 1888 | } |
| 1889 | |
| 1890 | void |
| 1891 | ufs_gop_markupdate(struct vnode *vp, int flags) |
| 1892 | { |
| 1893 | u_int32_t mask = 0; |
| 1894 | |
| 1895 | if ((flags & GOP_UPDATE_ACCESSED) != 0) { |
| 1896 | mask = IN_ACCESS; |
| 1897 | } |
| 1898 | if ((flags & GOP_UPDATE_MODIFIED) != 0) { |
| 1899 | if (vp->v_type == VREG) { |
| 1900 | mask |= IN_CHANGE | IN_UPDATE; |
| 1901 | } else { |
| 1902 | mask |= IN_MODIFY; |
| 1903 | } |
| 1904 | } |
| 1905 | if (mask) { |
| 1906 | struct inode *ip = VTOI(vp); |
| 1907 | |
| 1908 | ip->i_flag |= mask; |
| 1909 | } |
| 1910 | } |
| 1911 | |
| 1912 | int |
| 1913 | ufs_bufio(enum uio_rw rw, struct vnode *vp, void *buf, size_t len, off_t off, |
| 1914 | int ioflg, kauth_cred_t cred, size_t *aresid, struct lwp *l) |
| 1915 | { |
| 1916 | struct iovec iov; |
| 1917 | struct uio uio; |
| 1918 | int error; |
| 1919 | |
| 1920 | KASSERT(ISSET(ioflg, IO_NODELOCKED)); |
| 1921 | KASSERT(VOP_ISLOCKED(vp)); |
| 1922 | KASSERT(rw != UIO_WRITE || VOP_ISLOCKED(vp) == LK_EXCLUSIVE); |
| 1923 | KASSERT(rw != UIO_WRITE || vp->v_mount->mnt_wapbl == NULL || |
| 1924 | ISSET(ioflg, IO_JOURNALLOCKED)); |
| 1925 | |
| 1926 | iov.iov_base = buf; |
| 1927 | iov.iov_len = len; |
| 1928 | uio.uio_iov = &iov; |
| 1929 | uio.uio_iovcnt = 1; |
| 1930 | uio.uio_resid = len; |
| 1931 | uio.uio_offset = off; |
| 1932 | uio.uio_rw = rw; |
| 1933 | UIO_SETUP_SYSSPACE(&uio); |
| 1934 | |
| 1935 | switch (rw) { |
| 1936 | case UIO_READ: |
| 1937 | error = UFS_BUFRD(vp, &uio, ioflg, cred); |
| 1938 | break; |
| 1939 | case UIO_WRITE: |
| 1940 | error = UFS_BUFWR(vp, &uio, ioflg, cred); |
| 1941 | break; |
| 1942 | default: |
| 1943 | panic("invalid uio rw: %d" , (int)rw); |
| 1944 | } |
| 1945 | |
| 1946 | if (aresid) |
| 1947 | *aresid = uio.uio_resid; |
| 1948 | else if (uio.uio_resid && error == 0) |
| 1949 | error = EIO; |
| 1950 | |
| 1951 | KASSERT(VOP_ISLOCKED(vp)); |
| 1952 | KASSERT(rw != UIO_WRITE || VOP_ISLOCKED(vp) == LK_EXCLUSIVE); |
| 1953 | return error; |
| 1954 | } |
| 1955 | |