Annotation of sys/ufs/ufs/ufs_vnops.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ufs_vnops.c,v 1.82 2007/06/20 15:03:40 thib Exp $ */
! 2: /* $NetBSD: ufs_vnops.c,v 1.18 1996/05/11 18:28:04 mycroft Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1982, 1986, 1989, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: * (c) UNIX System Laboratories, Inc.
! 8: * All or some portions of this file are derived from material licensed
! 9: * to the University of California by American Telephone and Telegraph
! 10: * Co. or Unix System Laboratories, Inc. and are reproduced herein with
! 11: * the permission of UNIX System Laboratories, Inc.
! 12: *
! 13: * Redistribution and use in source and binary forms, with or without
! 14: * modification, are permitted provided that the following conditions
! 15: * are met:
! 16: * 1. Redistributions of source code must retain the above copyright
! 17: * notice, this list of conditions and the following disclaimer.
! 18: * 2. Redistributions in binary form must reproduce the above copyright
! 19: * notice, this list of conditions and the following disclaimer in the
! 20: * documentation and/or other materials provided with the distribution.
! 21: * 3. Neither the name of the University nor the names of its contributors
! 22: * may be used to endorse or promote products derived from this software
! 23: * without specific prior written permission.
! 24: *
! 25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: * SUCH DAMAGE.
! 36: *
! 37: * @(#)ufs_vnops.c 8.14 (Berkeley) 10/26/94
! 38: */
! 39:
! 40: #include <sys/param.h>
! 41: #include <sys/systm.h>
! 42: #include <sys/namei.h>
! 43: #include <sys/resourcevar.h>
! 44: #include <sys/kernel.h>
! 45: #include <sys/file.h>
! 46: #include <sys/stat.h>
! 47: #include <sys/buf.h>
! 48: #include <sys/proc.h>
! 49: #include <sys/conf.h>
! 50: #include <sys/mount.h>
! 51: #include <sys/vnode.h>
! 52: #include <sys/malloc.h>
! 53: #include <sys/pool.h>
! 54: #include <sys/dirent.h>
! 55: #include <sys/lockf.h>
! 56: #include <sys/event.h>
! 57: #include <sys/poll.h>
! 58:
! 59: #include <uvm/uvm_extern.h>
! 60:
! 61: #include <miscfs/specfs/specdev.h>
! 62: #include <miscfs/fifofs/fifo.h>
! 63:
! 64: #include <ufs/ufs/quota.h>
! 65: #include <ufs/ufs/inode.h>
! 66: #include <ufs/ufs/dir.h>
! 67: #include <ufs/ufs/ufsmount.h>
! 68: #include <ufs/ufs/ufs_extern.h>
! 69: #ifdef UFS_DIRHASH
! 70: #include <ufs/ufs/dirhash.h>
! 71: #endif
! 72: #include <ufs/ext2fs/ext2fs_extern.h>
! 73:
! 74: static int ufs_chmod(struct vnode *, int, struct ucred *, struct proc *);
! 75: static int ufs_chown(struct vnode *, uid_t, gid_t, struct ucred *, struct proc *);
! 76: int filt_ufsread(struct knote *, long);
! 77: int filt_ufswrite(struct knote *, long);
! 78: int filt_ufsvnode(struct knote *, long);
! 79: void filt_ufsdetach(struct knote *);
! 80:
! 81: union _qcvt {
! 82: int64_t qcvt;
! 83: int32_t val[2];
! 84: };
! 85:
! 86: #define SETHIGH(q, h) { \
! 87: union _qcvt tmp; \
! 88: tmp.qcvt = (q); \
! 89: tmp.val[_QUAD_HIGHWORD] = (h); \
! 90: (q) = tmp.qcvt; \
! 91: }
! 92: #define SETLOW(q, l) { \
! 93: union _qcvt tmp; \
! 94: tmp.qcvt = (q); \
! 95: tmp.val[_QUAD_LOWWORD] = (l); \
! 96: (q) = tmp.qcvt; \
! 97: }
! 98:
! 99: /*
! 100: * A virgin directory (no blushing please).
! 101: */
! 102: static struct dirtemplate mastertemplate = {
! 103: 0, 12, DT_DIR, 1, ".",
! 104: 0, DIRBLKSIZ - 12, DT_DIR, 2, ".."
! 105: };
! 106: static struct odirtemplate omastertemplate = {
! 107: 0, 12, 1, ".",
! 108: 0, DIRBLKSIZ - 12, 2, ".."
! 109: };
! 110:
! 111: /*
! 112: * Create a regular file
! 113: */
! 114: int
! 115: ufs_create(void *v)
! 116: {
! 117: struct vop_create_args *ap = v;
! 118: int error;
! 119:
! 120: error =
! 121: ufs_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode),
! 122: ap->a_dvp, ap->a_vpp, ap->a_cnp);
! 123: if (error)
! 124: return (error);
! 125: VN_KNOTE(ap->a_dvp, NOTE_WRITE);
! 126: return (0);
! 127: }
! 128:
! 129: /*
! 130: * Mknod vnode call
! 131: */
! 132: /* ARGSUSED */
! 133: int
! 134: ufs_mknod(void *v)
! 135: {
! 136: struct vop_mknod_args *ap = v;
! 137: struct vattr *vap = ap->a_vap;
! 138: struct vnode **vpp = ap->a_vpp;
! 139: struct inode *ip;
! 140: int error;
! 141:
! 142: if ((error =
! 143: ufs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode),
! 144: ap->a_dvp, vpp, ap->a_cnp)) != 0)
! 145: return (error);
! 146: VN_KNOTE(ap->a_dvp, NOTE_WRITE);
! 147: ip = VTOI(*vpp);
! 148: ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
! 149: if (vap->va_rdev != VNOVAL) {
! 150: /*
! 151: * Want to be able to use this to make badblock
! 152: * inodes, so don't truncate the dev number.
! 153: */
! 154: DIP_ASSIGN(ip, rdev, vap->va_rdev);
! 155: }
! 156: /*
! 157: * Remove inode so that it will be reloaded by VFS_VGET and
! 158: * checked to see if it is an alias of an existing entry in
! 159: * the inode cache.
! 160: */
! 161: vput(*vpp);
! 162: (*vpp)->v_type = VNON;
! 163: vgone(*vpp);
! 164: *vpp = 0;
! 165: return (0);
! 166: }
! 167:
! 168: /*
! 169: * Open called.
! 170: *
! 171: * Nothing to do.
! 172: */
! 173: /* ARGSUSED */
! 174: int
! 175: ufs_open(void *v)
! 176: {
! 177: struct vop_open_args *ap = v;
! 178: struct inode *ip = VTOI(ap->a_vp);
! 179:
! 180: /*
! 181: * Files marked append-only must be opened for appending.
! 182: */
! 183: if ((DIP(ip, flags) & APPEND) &&
! 184: (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE)
! 185: return (EPERM);
! 186:
! 187: if (ap->a_mode & O_TRUNC)
! 188: ip->i_flag |= IN_CHANGE | IN_UPDATE;
! 189:
! 190: return (0);
! 191: }
! 192:
! 193: /*
! 194: * Close called.
! 195: *
! 196: * Update the times on the inode.
! 197: */
! 198: /* ARGSUSED */
! 199: int
! 200: ufs_close(void *v)
! 201: {
! 202: struct vop_close_args *ap = v;
! 203: struct vnode *vp = ap->a_vp;
! 204: struct inode *ip = VTOI(vp);
! 205:
! 206: if (vp->v_usecount > 1) {
! 207: struct timeval tv;
! 208:
! 209: getmicrotime(&tv);
! 210: ITIMES(ip, &tv, &tv);
! 211: }
! 212: return (0);
! 213: }
! 214:
! 215: int
! 216: ufs_access(void *v)
! 217: {
! 218: struct vop_access_args *ap = v;
! 219: struct vnode *vp = ap->a_vp;
! 220: struct inode *ip = VTOI(vp);
! 221: mode_t mode = ap->a_mode;
! 222:
! 223: /*
! 224: * Disallow write attempts on read-only file systems;
! 225: * unless the file is a socket, fifo, or a block or
! 226: * character device resident on the file system.
! 227: */
! 228: if (mode & VWRITE) {
! 229: switch (vp->v_type) {
! 230: int error;
! 231: case VDIR:
! 232: case VLNK:
! 233: case VREG:
! 234: if (vp->v_mount->mnt_flag & MNT_RDONLY)
! 235: return (EROFS);
! 236:
! 237: if ((error = getinoquota(ip)) != 0)
! 238: return (error);
! 239: break;
! 240: case VBAD:
! 241: case VBLK:
! 242: case VCHR:
! 243: case VSOCK:
! 244: case VFIFO:
! 245: case VNON:
! 246: break;
! 247:
! 248: }
! 249: }
! 250:
! 251: /* If immutable bit set, nobody gets to write it. */
! 252: if ((mode & VWRITE) && (DIP(ip, flags) & IMMUTABLE))
! 253: return (EPERM);
! 254:
! 255: return (vaccess(DIP(ip, mode), DIP(ip, uid), DIP(ip, gid), mode,
! 256: ap->a_cred));
! 257: }
! 258:
! 259: /* ARGSUSED */
! 260: int
! 261: ufs_getattr(void *v)
! 262: {
! 263: struct vop_getattr_args *ap = v;
! 264: struct vnode *vp = ap->a_vp;
! 265: struct inode *ip = VTOI(vp);
! 266: struct vattr *vap = ap->a_vap;
! 267: struct timeval tv;
! 268:
! 269: getmicrotime(&tv);
! 270: ITIMES(ip, &tv, &tv);
! 271: /*
! 272: * Copy from inode table
! 273: */
! 274: vap->va_fsid = ip->i_dev;
! 275: vap->va_fileid = ip->i_number;
! 276: vap->va_mode = DIP(ip, mode) & ~IFMT;
! 277: vap->va_nlink = ip->i_effnlink;
! 278: vap->va_uid = DIP(ip, uid);
! 279: vap->va_gid = DIP(ip, gid);
! 280: vap->va_rdev = (dev_t) DIP(ip, rdev);
! 281: vap->va_size = DIP(ip, size);
! 282: vap->va_atime.tv_sec = DIP(ip, atime);
! 283: vap->va_atime.tv_nsec = DIP(ip, atimensec);
! 284: vap->va_mtime.tv_sec = DIP(ip, mtime);
! 285: vap->va_mtime.tv_nsec = DIP(ip, mtimensec);
! 286: vap->va_ctime.tv_sec = DIP(ip, ctime);
! 287: vap->va_ctime.tv_nsec = DIP(ip, ctimensec);
! 288: vap->va_flags = DIP(ip, flags);
! 289: vap->va_gen = DIP(ip, gen);
! 290: /* this doesn't belong here */
! 291: if (vp->v_type == VBLK)
! 292: vap->va_blocksize = BLKDEV_IOSIZE;
! 293: else if (vp->v_type == VCHR)
! 294: vap->va_blocksize = MAXBSIZE;
! 295: else
! 296: vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize;
! 297: vap->va_bytes = dbtob((u_quad_t) DIP(ip, blocks));
! 298: vap->va_type = vp->v_type;
! 299: vap->va_filerev = ip->i_modrev;
! 300: return (0);
! 301: }
! 302:
! 303: /*
! 304: * Set attribute vnode op. called from several syscalls
! 305: */
! 306: int
! 307: ufs_setattr(void *v)
! 308: {
! 309: struct vop_setattr_args *ap = v;
! 310: struct vattr *vap = ap->a_vap;
! 311: struct vnode *vp = ap->a_vp;
! 312: struct inode *ip = VTOI(vp);
! 313: struct ucred *cred = ap->a_cred;
! 314: struct proc *p = ap->a_p;
! 315: int error;
! 316: long hint = NOTE_ATTRIB;
! 317: u_quad_t oldsize;
! 318:
! 319: /*
! 320: * Check for unsettable attributes.
! 321: */
! 322: if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) ||
! 323: (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
! 324: (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
! 325: ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
! 326: return (EINVAL);
! 327: }
! 328: if (vap->va_flags != VNOVAL) {
! 329: if (vp->v_mount->mnt_flag & MNT_RDONLY)
! 330: return (EROFS);
! 331: if (cred->cr_uid != DIP(ip, uid) &&
! 332: (error = suser_ucred(cred)))
! 333: return (error);
! 334: if (cred->cr_uid == 0) {
! 335: if ((DIP(ip, flags) & (SF_IMMUTABLE | SF_APPEND)) &&
! 336: securelevel > 0)
! 337: return (EPERM);
! 338: DIP_ASSIGN(ip, flags, vap->va_flags);
! 339: } else {
! 340: if (DIP(ip, flags) & (SF_IMMUTABLE | SF_APPEND) ||
! 341: (vap->va_flags & UF_SETTABLE) != vap->va_flags)
! 342: return (EPERM);
! 343: DIP(ip, flags) &= SF_SETTABLE;
! 344: DIP(ip, flags) |= (vap->va_flags & UF_SETTABLE);
! 345: }
! 346: ip->i_flag |= IN_CHANGE;
! 347: if (vap->va_flags & (IMMUTABLE | APPEND))
! 348: return (0);
! 349: }
! 350: if (DIP(ip, flags) & (IMMUTABLE | APPEND))
! 351: return (EPERM);
! 352: /*
! 353: * Go through the fields and update if not VNOVAL.
! 354: */
! 355: if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
! 356: if (vp->v_mount->mnt_flag & MNT_RDONLY)
! 357: return (EROFS);
! 358: error = ufs_chown(vp, vap->va_uid, vap->va_gid, cred, p);
! 359: if (error)
! 360: return (error);
! 361: }
! 362: if (vap->va_size != VNOVAL) {
! 363: oldsize = DIP(ip, size);
! 364: /*
! 365: * Disallow write attempts on read-only file systems;
! 366: * unless the file is a socket, fifo, or a block or
! 367: * character device resident on the file system.
! 368: */
! 369: switch (vp->v_type) {
! 370: case VDIR:
! 371: return (EISDIR);
! 372: case VLNK:
! 373: case VREG:
! 374: if (vp->v_mount->mnt_flag & MNT_RDONLY)
! 375: return (EROFS);
! 376: break;
! 377: default:
! 378: break;
! 379: }
! 380: if ((error = UFS_TRUNCATE(ip, vap->va_size, 0, cred)) != 0)
! 381: return (error);
! 382: if (vap->va_size < oldsize)
! 383: hint |= NOTE_TRUNCATE;
! 384: }
! 385: if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
! 386: if (vp->v_mount->mnt_flag & MNT_RDONLY)
! 387: return (EROFS);
! 388: if (cred->cr_uid != DIP(ip, uid) &&
! 389: (error = suser_ucred(cred)) &&
! 390: ((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
! 391: (error = VOP_ACCESS(vp, VWRITE, cred, p))))
! 392: return (error);
! 393: if (vap->va_atime.tv_sec != VNOVAL)
! 394: ip->i_flag |= IN_ACCESS;
! 395: if (vap->va_mtime.tv_sec != VNOVAL)
! 396: ip->i_flag |= IN_CHANGE | IN_UPDATE;
! 397: error = UFS_UPDATE2(ip, &vap->va_atime, &vap->va_mtime, 0);
! 398: if (error)
! 399: return (error);
! 400: }
! 401: error = 0;
! 402: if (vap->va_mode != (mode_t)VNOVAL) {
! 403: if (vp->v_mount->mnt_flag & MNT_RDONLY)
! 404: return (EROFS);
! 405: error = ufs_chmod(vp, (int)vap->va_mode, cred, p);
! 406: }
! 407: VN_KNOTE(vp, hint);
! 408: return (error);
! 409: }
! 410:
! 411: /*
! 412: * Change the mode on a file.
! 413: * Inode must be locked before calling.
! 414: */
! 415: static int
! 416: ufs_chmod(struct vnode *vp, int mode, struct ucred *cred, struct proc *p)
! 417: {
! 418: struct inode *ip = VTOI(vp);
! 419: int error;
! 420:
! 421: if (cred->cr_uid != DIP(ip, uid) &&
! 422: (error = suser_ucred(cred)))
! 423: return (error);
! 424: if (cred->cr_uid) {
! 425: if (vp->v_type != VDIR && (mode & S_ISTXT))
! 426: return (EFTYPE);
! 427: if (!groupmember(DIP(ip, gid), cred) && (mode & ISGID))
! 428: return (EPERM);
! 429: }
! 430: DIP(ip, mode) &= ~ALLPERMS;
! 431: DIP(ip, mode) |= (mode & ALLPERMS);
! 432: ip->i_flag |= IN_CHANGE;
! 433: if ((vp->v_flag & VTEXT) && (DIP(ip, mode) & S_ISTXT) == 0)
! 434: (void) uvm_vnp_uncache(vp);
! 435: return (0);
! 436: }
! 437:
! 438: /*
! 439: * Perform chown operation on inode ip;
! 440: * inode must be locked prior to call.
! 441: */
! 442: static int
! 443: ufs_chown(struct vnode *vp, uid_t uid, gid_t gid, struct ucred *cred,
! 444: struct proc *p)
! 445: {
! 446: struct inode *ip = VTOI(vp);
! 447: uid_t ouid;
! 448: gid_t ogid;
! 449: int error = 0;
! 450: daddr_t change;
! 451: enum ufs_quota_flags quota_flags = 0;
! 452:
! 453: if (uid == (uid_t)VNOVAL)
! 454: uid = DIP(ip, uid);
! 455: if (gid == (gid_t)VNOVAL)
! 456: gid = DIP(ip, gid);
! 457: /*
! 458: * If we don't own the file, are trying to change the owner
! 459: * of the file, or are not a member of the target group,
! 460: * the caller must be superuser or the call fails.
! 461: */
! 462: if ((cred->cr_uid != DIP(ip, uid) || uid != DIP(ip, uid) ||
! 463: (gid != DIP(ip, gid) && !groupmember((gid_t)gid, cred))) &&
! 464: (error = suser_ucred(cred)))
! 465: return (error);
! 466: ogid = DIP(ip, gid);
! 467: ouid = DIP(ip, uid);
! 468: change = DIP(ip, blocks);
! 469:
! 470: if (ouid == uid)
! 471: quota_flags |= UFS_QUOTA_NOUID;
! 472:
! 473: if (ogid == gid)
! 474: quota_flags |= UFS_QUOTA_NOGID;
! 475:
! 476: if ((error = getinoquota(ip)) != 0)
! 477: return (error);
! 478: (void) ufs_quota_free_blocks2(ip, change, cred, quota_flags);
! 479: (void) ufs_quota_free_inode2(ip, cred, quota_flags);
! 480: (void) ufs_quota_delete(ip);
! 481:
! 482: DIP_ASSIGN(ip, gid, gid);
! 483: DIP_ASSIGN(ip, uid, uid);
! 484:
! 485: if ((error = getinoquota(ip)) != 0)
! 486: goto error;
! 487:
! 488: if ((error = ufs_quota_alloc_blocks2(ip, change, cred,
! 489: quota_flags)) != 0)
! 490: goto error;
! 491:
! 492: if ((error = ufs_quota_alloc_inode2(ip, cred ,
! 493: quota_flags)) != 0) {
! 494: (void)ufs_quota_free_blocks2(ip, change, cred,
! 495: quota_flags);
! 496: goto error;
! 497: }
! 498:
! 499: if (getinoquota(ip))
! 500: panic("chown: lost quota");
! 501:
! 502: if (ouid != uid || ogid != gid)
! 503: ip->i_flag |= IN_CHANGE;
! 504: if (ouid != uid && cred->cr_uid != 0)
! 505: DIP(ip, mode) &= ~ISUID;
! 506: if (ogid != gid && cred->cr_uid != 0)
! 507: DIP(ip, mode) &= ~ISGID;
! 508: return (0);
! 509:
! 510: error:
! 511: (void) ufs_quota_delete(ip);
! 512:
! 513: DIP_ASSIGN(ip, gid, ogid);
! 514: DIP_ASSIGN(ip, uid, ouid);
! 515:
! 516: if (getinoquota(ip) == 0) {
! 517: (void) ufs_quota_alloc_blocks2(ip, change, cred,
! 518: quota_flags | UFS_QUOTA_FORCE);
! 519: (void) ufs_quota_alloc_inode2(ip, cred,
! 520: quota_flags | UFS_QUOTA_FORCE);
! 521: (void) getinoquota(ip);
! 522: }
! 523: return (error);
! 524:
! 525: }
! 526:
! 527: /* ARGSUSED */
! 528: int
! 529: ufs_ioctl(void *v)
! 530: {
! 531: #if 0
! 532: struct vop_ioctl_args *ap = v;
! 533: #endif
! 534: return (ENOTTY);
! 535: }
! 536:
! 537: /* ARGSUSED */
! 538: int
! 539: ufs_poll(void *v)
! 540: {
! 541: struct vop_poll_args *ap = v;
! 542:
! 543: /*
! 544: * We should really check to see if I/O is possible.
! 545: */
! 546: return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM));
! 547: }
! 548:
! 549: int
! 550: ufs_remove(void *v)
! 551: {
! 552: struct vop_remove_args *ap = v;
! 553: struct inode *ip;
! 554: struct vnode *vp = ap->a_vp;
! 555: struct vnode *dvp = ap->a_dvp;
! 556: int error;
! 557:
! 558: ip = VTOI(vp);
! 559: if (vp->v_type == VDIR || (DIP(ip, flags) & (IMMUTABLE | APPEND)) ||
! 560: (DIP(VTOI(dvp), flags) & APPEND)) {
! 561: error = EPERM;
! 562: goto out;
! 563: }
! 564: error = ufs_dirremove(dvp, ip, ap->a_cnp->cn_flags, 0);
! 565: VN_KNOTE(vp, NOTE_DELETE);
! 566: VN_KNOTE(dvp, NOTE_WRITE);
! 567: out:
! 568: if (dvp == vp)
! 569: vrele(vp);
! 570: else
! 571: vput(vp);
! 572: vput(dvp);
! 573: return (error);
! 574: }
! 575:
! 576: /*
! 577: * link vnode call
! 578: */
! 579: int
! 580: ufs_link(void *v)
! 581: {
! 582: struct vop_link_args *ap = v;
! 583: struct vnode *dvp = ap->a_dvp;
! 584: struct vnode *vp = ap->a_vp;
! 585: struct componentname *cnp = ap->a_cnp;
! 586: struct proc *p = cnp->cn_proc;
! 587: struct inode *ip;
! 588: struct direct newdir;
! 589: int error;
! 590:
! 591: #ifdef DIAGNOSTIC
! 592: if ((cnp->cn_flags & HASBUF) == 0)
! 593: panic("ufs_link: no name");
! 594: #endif
! 595: if (vp->v_type == VDIR) {
! 596: VOP_ABORTOP(dvp, cnp);
! 597: error = EPERM;
! 598: goto out2;
! 599: }
! 600: if (dvp->v_mount != vp->v_mount) {
! 601: VOP_ABORTOP(dvp, cnp);
! 602: error = EXDEV;
! 603: goto out2;
! 604: }
! 605: if (dvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE, p))) {
! 606: VOP_ABORTOP(dvp, cnp);
! 607: goto out2;
! 608: }
! 609: ip = VTOI(vp);
! 610: if ((nlink_t) DIP(ip, nlink) >= LINK_MAX) {
! 611: VOP_ABORTOP(dvp, cnp);
! 612: error = EMLINK;
! 613: goto out1;
! 614: }
! 615: if (DIP(ip, flags) & (IMMUTABLE | APPEND)) {
! 616: VOP_ABORTOP(dvp, cnp);
! 617: error = EPERM;
! 618: goto out1;
! 619: }
! 620: ip->i_effnlink++;
! 621: DIP_ADD(ip, nlink, 1);
! 622: ip->i_flag |= IN_CHANGE;
! 623: if (DOINGSOFTDEP(vp))
! 624: softdep_change_linkcnt(ip, 0);
! 625: if ((error = UFS_UPDATE(ip, !DOINGSOFTDEP(vp))) == 0) {
! 626: ufs_makedirentry(ip, cnp, &newdir);
! 627: error = ufs_direnter(dvp, vp, &newdir, cnp, NULL);
! 628: }
! 629: if (error) {
! 630: ip->i_effnlink--;
! 631: DIP_ADD(ip, nlink, -1);
! 632: ip->i_flag |= IN_CHANGE;
! 633: if (DOINGSOFTDEP(vp))
! 634: softdep_change_linkcnt(ip, 0);
! 635: }
! 636: pool_put(&namei_pool, cnp->cn_pnbuf);
! 637: VN_KNOTE(vp, NOTE_LINK);
! 638: VN_KNOTE(dvp, NOTE_WRITE);
! 639: out1:
! 640: if (dvp != vp)
! 641: VOP_UNLOCK(vp, 0, p);
! 642: out2:
! 643: vput(dvp);
! 644: return (error);
! 645: }
! 646:
! 647: /*
! 648: * Rename system call.
! 649: * rename("foo", "bar");
! 650: * is essentially
! 651: * unlink("bar");
! 652: * link("foo", "bar");
! 653: * unlink("foo");
! 654: * but ``atomically''. Can't do full commit without saving state in the
! 655: * inode on disk which isn't feasible at this time. Best we can do is
! 656: * always guarantee the target exists.
! 657: *
! 658: * Basic algorithm is:
! 659: *
! 660: * 1) Bump link count on source while we're linking it to the
! 661: * target. This also ensure the inode won't be deleted out
! 662: * from underneath us while we work (it may be truncated by
! 663: * a concurrent `trunc' or `open' for creation).
! 664: * 2) Link source to destination. If destination already exists,
! 665: * delete it first.
! 666: * 3) Unlink source reference to inode if still around. If a
! 667: * directory was moved and the parent of the destination
! 668: * is different from the source, patch the ".." entry in the
! 669: * directory.
! 670: */
! 671: int
! 672: ufs_rename(void *v)
! 673: {
! 674: struct vop_rename_args *ap = v;
! 675: struct vnode *tvp = ap->a_tvp;
! 676: struct vnode *tdvp = ap->a_tdvp;
! 677: struct vnode *fvp = ap->a_fvp;
! 678: struct vnode *fdvp = ap->a_fdvp;
! 679: struct componentname *tcnp = ap->a_tcnp;
! 680: struct componentname *fcnp = ap->a_fcnp;
! 681: struct proc *p = fcnp->cn_proc;
! 682: struct inode *ip, *xp, *dp;
! 683: struct direct newdir;
! 684: int doingdirectory = 0, oldparent = 0, newparent = 0;
! 685: int error = 0;
! 686:
! 687: #ifdef DIAGNOSTIC
! 688: if ((tcnp->cn_flags & HASBUF) == 0 ||
! 689: (fcnp->cn_flags & HASBUF) == 0)
! 690: panic("ufs_rename: no name");
! 691: #endif
! 692: /*
! 693: * Check for cross-device rename.
! 694: */
! 695: if ((fvp->v_mount != tdvp->v_mount) ||
! 696: (tvp && (fvp->v_mount != tvp->v_mount))) {
! 697: error = EXDEV;
! 698: abortit:
! 699: VOP_ABORTOP(tdvp, tcnp);
! 700: if (tdvp == tvp)
! 701: vrele(tdvp);
! 702: else
! 703: vput(tdvp);
! 704: if (tvp)
! 705: vput(tvp);
! 706: VOP_ABORTOP(fdvp, fcnp);
! 707: vrele(fdvp);
! 708: vrele(fvp);
! 709: return (error);
! 710: }
! 711:
! 712: if (tvp && ((DIP(VTOI(tvp), flags) & (IMMUTABLE | APPEND)) ||
! 713: (DIP(VTOI(tdvp), flags) & APPEND))) {
! 714: error = EPERM;
! 715: goto abortit;
! 716: }
! 717:
! 718: /*
! 719: * Check if just deleting a link name or if we've lost a race.
! 720: * If another process completes the same rename after we've looked
! 721: * up the source and have blocked looking up the target, then the
! 722: * source and target inodes may be identical now although the
! 723: * names were never linked.
! 724: */
! 725: if (fvp == tvp) {
! 726: if (fvp->v_type == VDIR) {
! 727: /*
! 728: * Linked directories are impossible, so we must
! 729: * have lost the race. Pretend that the rename
! 730: * completed before the lookup.
! 731: */
! 732: error = ENOENT;
! 733: goto abortit;
! 734: }
! 735:
! 736: /* Release destination completely. */
! 737: VOP_ABORTOP(tdvp, tcnp);
! 738: vput(tdvp);
! 739: vput(tvp);
! 740:
! 741: /*
! 742: * Delete source. There is another race now that everything
! 743: * is unlocked, but this doesn't cause any new complications.
! 744: * relookup() may find a file that is unrelated to the
! 745: * original one, or it may fail. Too bad.
! 746: */
! 747: vrele(fvp);
! 748: fcnp->cn_flags &= ~MODMASK;
! 749: fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
! 750: if ((fcnp->cn_flags & SAVESTART) == 0)
! 751: panic("ufs_rename: lost from startdir");
! 752: fcnp->cn_nameiop = DELETE;
! 753: if ((error = relookup(fdvp, &fvp, fcnp)) != 0)
! 754: return (error); /* relookup did vrele() */
! 755: vrele(fdvp);
! 756: return (VOP_REMOVE(fdvp, fvp, fcnp));
! 757: }
! 758:
! 759: if ((error = vn_lock(fvp, LK_EXCLUSIVE, p)) != 0)
! 760: goto abortit;
! 761:
! 762: /* fvp, tdvp, tvp now locked */
! 763: dp = VTOI(fdvp);
! 764: ip = VTOI(fvp);
! 765: if ((nlink_t) DIP(ip, nlink) >= LINK_MAX) {
! 766: VOP_UNLOCK(fvp, 0, p);
! 767: error = EMLINK;
! 768: goto abortit;
! 769: }
! 770: if ((DIP(ip, flags) & (IMMUTABLE | APPEND)) ||
! 771: (DIP(dp, flags) & APPEND)) {
! 772: VOP_UNLOCK(fvp, 0, p);
! 773: error = EPERM;
! 774: goto abortit;
! 775: }
! 776: if ((DIP(ip, mode) & IFMT) == IFDIR) {
! 777: error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc);
! 778: if (!error && tvp)
! 779: error = VOP_ACCESS(tvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc);
! 780: if (error) {
! 781: VOP_UNLOCK(fvp, 0, p);
! 782: error = EACCES;
! 783: goto abortit;
! 784: }
! 785: /*
! 786: * Avoid ".", "..", and aliases of "." for obvious reasons.
! 787: */
! 788: if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
! 789: dp == ip ||
! 790: (fcnp->cn_flags & ISDOTDOT) ||
! 791: (tcnp->cn_flags & ISDOTDOT) ||
! 792: (ip->i_flag & IN_RENAME)) {
! 793: VOP_UNLOCK(fvp, 0, p);
! 794: error = EINVAL;
! 795: goto abortit;
! 796: }
! 797: ip->i_flag |= IN_RENAME;
! 798: oldparent = dp->i_number;
! 799: doingdirectory = 1;
! 800: }
! 801: VN_KNOTE(fdvp, NOTE_WRITE); /* XXX right place? */
! 802:
! 803: /*
! 804: * When the target exists, both the directory
! 805: * and target vnodes are returned locked.
! 806: */
! 807: dp = VTOI(tdvp);
! 808: xp = NULL;
! 809: if (tvp)
! 810: xp = VTOI(tvp);
! 811:
! 812: /*
! 813: * 1) Bump link count while we're moving stuff
! 814: * around. If we crash somewhere before
! 815: * completing our work, the link count
! 816: * may be wrong, but correctable.
! 817: */
! 818: ip->i_effnlink++;
! 819: DIP_ADD(ip, nlink, 1);
! 820: ip->i_flag |= IN_CHANGE;
! 821: if (DOINGSOFTDEP(fvp))
! 822: softdep_change_linkcnt(ip, 0);
! 823: if ((error = UFS_UPDATE(ip, !DOINGSOFTDEP(fvp))) != 0) {
! 824: VOP_UNLOCK(fvp, 0, p);
! 825: goto bad;
! 826: }
! 827:
! 828: /*
! 829: * If ".." must be changed (ie the directory gets a new
! 830: * parent) then the source directory must not be in the
! 831: * directory hierarchy above the target, as this would
! 832: * orphan everything below the source directory. Also
! 833: * the user must have write permission in the source so
! 834: * as to be able to change "..". We must repeat the call
! 835: * to namei, as the parent directory is unlocked by the
! 836: * call to checkpath().
! 837: */
! 838: error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_proc);
! 839: VOP_UNLOCK(fvp, 0, p);
! 840:
! 841: /* tdvp and tvp locked */
! 842: if (oldparent != dp->i_number)
! 843: newparent = dp->i_number;
! 844: if (doingdirectory && newparent) {
! 845: if (error) /* write access check above */
! 846: goto bad;
! 847: if (xp != NULL)
! 848: vput(tvp);
! 849: /*
! 850: * Compensate for the reference ufs_checkpath() loses.
! 851: */
! 852: vref(tdvp);
! 853: /* Only tdvp is locked */
! 854: if ((error = ufs_checkpath(ip, dp, tcnp->cn_cred)) != 0) {
! 855: vrele(tdvp);
! 856: goto out;
! 857: }
! 858: if ((tcnp->cn_flags & SAVESTART) == 0)
! 859: panic("ufs_rename: lost to startdir");
! 860: if ((error = relookup(tdvp, &tvp, tcnp)) != 0)
! 861: goto out;
! 862: vrele(tdvp); /* relookup() acquired a reference */
! 863: dp = VTOI(tdvp);
! 864: xp = NULL;
! 865: if (tvp)
! 866: xp = VTOI(tvp);
! 867: }
! 868: /*
! 869: * 2) If target doesn't exist, link the target
! 870: * to the source and unlink the source.
! 871: * Otherwise, rewrite the target directory
! 872: * entry to reference the source inode and
! 873: * expunge the original entry's existence.
! 874: */
! 875: if (xp == NULL) {
! 876: if (dp->i_dev != ip->i_dev)
! 877: panic("rename: EXDEV");
! 878: /*
! 879: * Account for ".." in new directory.
! 880: * When source and destination have the same
! 881: * parent we don't fool with the link count.
! 882: */
! 883: if (doingdirectory && newparent) {
! 884: if ((nlink_t) DIP(dp, nlink) >= LINK_MAX) {
! 885: error = EMLINK;
! 886: goto bad;
! 887: }
! 888: dp->i_effnlink++;
! 889: DIP_ADD(dp, nlink, 1);
! 890: dp->i_flag |= IN_CHANGE;
! 891: if (DOINGSOFTDEP(tdvp))
! 892: softdep_change_linkcnt(dp, 0);
! 893: if ((error = UFS_UPDATE(dp, !DOINGSOFTDEP(tdvp)))
! 894: != 0) {
! 895: dp->i_effnlink--;
! 896: DIP_ADD(dp, nlink, -1);
! 897: dp->i_flag |= IN_CHANGE;
! 898: if (DOINGSOFTDEP(tdvp))
! 899: softdep_change_linkcnt(dp, 0);
! 900: goto bad;
! 901: }
! 902: }
! 903: ufs_makedirentry(ip, tcnp, &newdir);
! 904: if ((error = ufs_direnter(tdvp, NULL, &newdir, tcnp, NULL)) != 0) {
! 905: if (doingdirectory && newparent) {
! 906: dp->i_effnlink--;
! 907: DIP_ADD(dp, nlink, -1);
! 908: dp->i_flag |= IN_CHANGE;
! 909: if (DOINGSOFTDEP(tdvp))
! 910: softdep_change_linkcnt(dp, 0);
! 911: (void)UFS_UPDATE(dp, 1);
! 912: }
! 913: goto bad;
! 914: }
! 915: VN_KNOTE(tdvp, NOTE_WRITE);
! 916: vput(tdvp);
! 917: } else {
! 918: if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev)
! 919: panic("rename: EXDEV");
! 920: /*
! 921: * Short circuit rename(foo, foo).
! 922: */
! 923: if (xp->i_number == ip->i_number)
! 924: panic("ufs_rename: same file");
! 925: /*
! 926: * If the parent directory is "sticky", then the user must
! 927: * own the parent directory, or the destination of the rename,
! 928: * otherwise the destination may not be changed (except by
! 929: * root). This implements append-only directories.
! 930: */
! 931: if ((DIP(dp, mode) & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 &&
! 932: tcnp->cn_cred->cr_uid != DIP(dp, uid) &&
! 933: DIP(xp, uid )!= tcnp->cn_cred->cr_uid) {
! 934: error = EPERM;
! 935: goto bad;
! 936: }
! 937: /*
! 938: * Target must be empty if a directory and have no links
! 939: * to it. Also, ensure source and target are compatible
! 940: * (both directories, or both not directories).
! 941: */
! 942: if ((DIP(xp, mode) & IFMT) == IFDIR) {
! 943: if (xp->i_effnlink > 2 ||
! 944: !ufs_dirempty(xp, dp->i_number, tcnp->cn_cred)) {
! 945: error = ENOTEMPTY;
! 946: goto bad;
! 947: }
! 948: if (!doingdirectory) {
! 949: error = ENOTDIR;
! 950: goto bad;
! 951: }
! 952: cache_purge(tdvp);
! 953: } else if (doingdirectory) {
! 954: error = EISDIR;
! 955: goto bad;
! 956: }
! 957:
! 958: if ((error = ufs_dirrewrite(dp, xp, ip->i_number,
! 959: IFTODT(DIP(ip, mode)), (doingdirectory && newparent) ?
! 960: newparent : doingdirectory)) != 0)
! 961: goto bad;
! 962: if (doingdirectory) {
! 963: if (!newparent) {
! 964: dp->i_effnlink--;
! 965: if (DOINGSOFTDEP(tdvp))
! 966: softdep_change_linkcnt(dp, 0);
! 967: }
! 968: xp->i_effnlink--;
! 969: if (DOINGSOFTDEP(tvp))
! 970: softdep_change_linkcnt(xp, 0);
! 971: }
! 972: if (doingdirectory && !DOINGSOFTDEP(tvp)) {
! 973: /*
! 974: * Truncate inode. The only stuff left in the directory
! 975: * is "." and "..". The "." reference is inconsequential
! 976: * since we are quashing it. We have removed the "."
! 977: * reference and the reference in the parent directory,
! 978: * but there may be other hard links. The soft
! 979: * dependency code will arrange to do these operations
! 980: * after the parent directory entry has been deleted on
! 981: * disk, so when running with that code we avoid doing
! 982: * them now.
! 983: */
! 984: if (!newparent) {
! 985: DIP_ADD(dp, nlink, -1);
! 986: dp->i_flag |= IN_CHANGE;
! 987: }
! 988:
! 989: DIP_ADD(xp, nlink, -1);
! 990: xp->i_flag |= IN_CHANGE;
! 991: if ((error = UFS_TRUNCATE(VTOI(tvp), (off_t)0, IO_SYNC,
! 992: tcnp->cn_cred)) != 0)
! 993: goto bad;
! 994: }
! 995: VN_KNOTE(tdvp, NOTE_WRITE);
! 996: vput(tdvp);
! 997: VN_KNOTE(tvp, NOTE_DELETE);
! 998: vput(tvp);
! 999: xp = NULL;
! 1000: }
! 1001:
! 1002: /*
! 1003: * 3) Unlink the source.
! 1004: */
! 1005: fcnp->cn_flags &= ~MODMASK;
! 1006: fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
! 1007: if ((fcnp->cn_flags & SAVESTART) == 0)
! 1008: panic("ufs_rename: lost from startdir");
! 1009: if ((error = relookup(fdvp, &fvp, fcnp)) != 0) {
! 1010: vrele(ap->a_fvp);
! 1011: return (error);
! 1012: }
! 1013: vrele(fdvp);
! 1014: if (fvp == NULL) {
! 1015: /*
! 1016: * From name has disappeared.
! 1017: */
! 1018: if (doingdirectory)
! 1019: panic("ufs_rename: lost dir entry");
! 1020: vrele(ap->a_fvp);
! 1021: return (0);
! 1022: }
! 1023:
! 1024: xp = VTOI(fvp);
! 1025: dp = VTOI(fdvp);
! 1026:
! 1027: /*
! 1028: * Ensure that the directory entry still exists and has not
! 1029: * changed while the new name has been entered. If the source is
! 1030: * a file then the entry may have been unlinked or renamed. In
! 1031: * either case there is no further work to be done. If the source
! 1032: * is a directory then it cannot have been rmdir'ed; the IN_RENAME
! 1033: * flag ensures that it cannot be moved by another rename or removed
! 1034: * by a rmdir.
! 1035: */
! 1036: if (xp != ip) {
! 1037: if (doingdirectory)
! 1038: panic("ufs_rename: lost dir entry");
! 1039: } else {
! 1040: /*
! 1041: * If the source is a directory with a
! 1042: * new parent, the link count of the old
! 1043: * parent directory must be decremented
! 1044: * and ".." set to point to the new parent.
! 1045: */
! 1046: if (doingdirectory && newparent) {
! 1047: xp->i_offset = mastertemplate.dot_reclen;
! 1048: ufs_dirrewrite(xp, dp, newparent, DT_DIR, 0);
! 1049: cache_purge(fdvp);
! 1050: }
! 1051: error = ufs_dirremove(fdvp, xp, fcnp->cn_flags, 0);
! 1052: xp->i_flag &= ~IN_RENAME;
! 1053: }
! 1054: VN_KNOTE(fvp, NOTE_RENAME);
! 1055: if (dp)
! 1056: vput(fdvp);
! 1057: if (xp)
! 1058: vput(fvp);
! 1059: vrele(ap->a_fvp);
! 1060: return (error);
! 1061:
! 1062: bad:
! 1063: if (xp)
! 1064: vput(ITOV(xp));
! 1065: vput(ITOV(dp));
! 1066: out:
! 1067: vrele(fdvp);
! 1068: if (doingdirectory)
! 1069: ip->i_flag &= ~IN_RENAME;
! 1070: if (vn_lock(fvp, LK_EXCLUSIVE, p) == 0) {
! 1071: ip->i_effnlink--;
! 1072: DIP_ADD(ip, nlink, -1);
! 1073: ip->i_flag |= IN_CHANGE;
! 1074: ip->i_flag &= ~IN_RENAME;
! 1075: if (DOINGSOFTDEP(fvp))
! 1076: softdep_change_linkcnt(ip, 0);
! 1077: vput(fvp);
! 1078: } else
! 1079: vrele(fvp);
! 1080: return (error);
! 1081: }
! 1082:
! 1083: /*
! 1084: * Mkdir system call
! 1085: */
! 1086: int
! 1087: ufs_mkdir(void *v)
! 1088: {
! 1089: struct vop_mkdir_args *ap = v;
! 1090: struct vnode *dvp = ap->a_dvp;
! 1091: struct vattr *vap = ap->a_vap;
! 1092: struct componentname *cnp = ap->a_cnp;
! 1093: struct inode *ip, *dp;
! 1094: struct vnode *tvp;
! 1095: struct buf *bp;
! 1096: struct direct newdir;
! 1097: struct dirtemplate dirtemplate, *dtp;
! 1098: int error, dmode, blkoff;
! 1099:
! 1100: #ifdef DIAGNOSTIC
! 1101: if ((cnp->cn_flags & HASBUF) == 0)
! 1102: panic("ufs_mkdir: no name");
! 1103: #endif
! 1104: dp = VTOI(dvp);
! 1105: if ((nlink_t) DIP(dp, nlink) >= LINK_MAX) {
! 1106: error = EMLINK;
! 1107: goto out;
! 1108: }
! 1109: dmode = vap->va_mode & 0777;
! 1110: dmode |= IFDIR;
! 1111: /*
! 1112: * Must simulate part of ufs_makeinode here to acquire the inode,
! 1113: * but not have it entered in the parent directory. The entry is
! 1114: * made later after writing "." and ".." entries.
! 1115: */
! 1116: if ((error = UFS_INODE_ALLOC(dp, dmode, cnp->cn_cred, &tvp)) != 0)
! 1117: goto out;
! 1118:
! 1119: ip = VTOI(tvp);
! 1120:
! 1121: DIP_ASSIGN(ip, uid, cnp->cn_cred->cr_uid);
! 1122: DIP_ASSIGN(ip, gid, DIP(dp, gid));
! 1123:
! 1124: if ((error = getinoquota(ip)) ||
! 1125: (error = ufs_quota_alloc_inode(ip, cnp->cn_cred))) {
! 1126: pool_put(&namei_pool, cnp->cn_pnbuf);
! 1127: UFS_INODE_FREE(ip, ip->i_number, dmode);
! 1128: vput(tvp);
! 1129: vput(dvp);
! 1130: return (error);
! 1131: }
! 1132:
! 1133: ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
! 1134: DIP_ASSIGN(ip, mode, dmode);
! 1135: tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */
! 1136: ip->i_effnlink = 2;
! 1137: DIP_ASSIGN(ip, nlink, 2);
! 1138: if (DOINGSOFTDEP(tvp))
! 1139: softdep_change_linkcnt(ip, 0);
! 1140:
! 1141: /*
! 1142: * Bump link count in parent directory to reflect work done below.
! 1143: * Should be done before reference is create so cleanup is
! 1144: * possible if we crash.
! 1145: */
! 1146: dp->i_effnlink++;
! 1147: DIP_ADD(dp, nlink, 1);
! 1148: dp->i_flag |= IN_CHANGE;
! 1149: if (DOINGSOFTDEP(dvp))
! 1150: softdep_change_linkcnt(dp, 0);
! 1151: if ((error = UFS_UPDATE(dp, !DOINGSOFTDEP(dvp))) != 0)
! 1152: goto bad;
! 1153:
! 1154: /*
! 1155: * Initialize directory with "." and ".." from static template.
! 1156: */
! 1157: if (dvp->v_mount->mnt_maxsymlinklen > 0)
! 1158: dtp = &mastertemplate;
! 1159: else
! 1160: dtp = (struct dirtemplate *)&omastertemplate;
! 1161: dirtemplate = *dtp;
! 1162: dirtemplate.dot_ino = ip->i_number;
! 1163: dirtemplate.dotdot_ino = dp->i_number;
! 1164:
! 1165: if ((error = UFS_BUF_ALLOC(ip, (off_t)0, DIRBLKSIZ, cnp->cn_cred,
! 1166: B_CLRBUF, &bp)) != 0)
! 1167: goto bad;
! 1168: DIP_ASSIGN(ip, size, DIRBLKSIZ);
! 1169: ip->i_flag |= IN_CHANGE | IN_UPDATE;
! 1170: uvm_vnp_setsize(tvp, DIP(ip, size));
! 1171: bcopy((caddr_t)&dirtemplate, (caddr_t)bp->b_data, sizeof dirtemplate);
! 1172: if (DOINGSOFTDEP(tvp)) {
! 1173: /*
! 1174: * Ensure that the entire newly allocated block is a
! 1175: * valid directory so that future growth within the
! 1176: * block does not have to ensure that the block is
! 1177: * written before the inode
! 1178: */
! 1179: blkoff = DIRBLKSIZ;
! 1180: while (blkoff < bp->b_bcount) {
! 1181: ((struct direct *)
! 1182: (bp->b_data + blkoff))->d_reclen = DIRBLKSIZ;
! 1183: blkoff += DIRBLKSIZ;
! 1184: }
! 1185: }
! 1186: if ((error = UFS_UPDATE(ip, !DOINGSOFTDEP(tvp))) != 0) {
! 1187: (void)VOP_BWRITE(bp);
! 1188: goto bad;
! 1189: }
! 1190:
! 1191: /*
! 1192: * Directory set up, now install its entry in the parent directory.
! 1193: *
! 1194: * If we are not doing soft dependencies, then we must write out the
! 1195: * buffer containing the new directory body before entering the new
! 1196: * name in the parent. If we are doing soft dependencies, then the
! 1197: * buffer containing the new directory body will be passed to and
! 1198: * released in the soft dependency code after the code has attached
! 1199: * an appropriate ordering dependency to the buffer which ensures that
! 1200: * the buffer is written before the new name is written in the parent.
! 1201: */
! 1202: if (!DOINGSOFTDEP(dvp) && ((error = VOP_BWRITE(bp)) != 0))
! 1203: goto bad;
! 1204: ufs_makedirentry(ip, cnp, &newdir);
! 1205: error = ufs_direnter(dvp, tvp, &newdir, cnp, bp);
! 1206:
! 1207: bad:
! 1208: if (error == 0) {
! 1209: VN_KNOTE(dvp, NOTE_WRITE);
! 1210: *ap->a_vpp = tvp;
! 1211: } else {
! 1212: dp->i_effnlink--;
! 1213: DIP_ADD(dp, nlink, -1);
! 1214: dp->i_flag |= IN_CHANGE;
! 1215: if (DOINGSOFTDEP(dvp))
! 1216: softdep_change_linkcnt(dp, 0);
! 1217: /*
! 1218: * No need to do an explicit VOP_TRUNCATE here, vrele will
! 1219: * do this for us because we set the link count to 0.
! 1220: */
! 1221: ip->i_effnlink = 0;
! 1222: DIP_ASSIGN(ip, nlink, 0);
! 1223: ip->i_flag |= IN_CHANGE;
! 1224: if (DOINGSOFTDEP(tvp))
! 1225: softdep_change_linkcnt(ip, 0);
! 1226: vput(tvp);
! 1227: }
! 1228: out:
! 1229: pool_put(&namei_pool, cnp->cn_pnbuf);
! 1230: vput(dvp);
! 1231:
! 1232: return (error);
! 1233: }
! 1234:
! 1235: /*
! 1236: * Rmdir system call.
! 1237: */
! 1238: int
! 1239: ufs_rmdir(void *v)
! 1240: {
! 1241: struct vop_rmdir_args *ap = v;
! 1242: struct vnode *vp = ap->a_vp;
! 1243: struct vnode *dvp = ap->a_dvp;
! 1244: struct componentname *cnp = ap->a_cnp;
! 1245: struct inode *ip, *dp;
! 1246: int error;
! 1247:
! 1248: ip = VTOI(vp);
! 1249: dp = VTOI(dvp);
! 1250: /*
! 1251: * No rmdir "." or of mounted on directories.
! 1252: */
! 1253: if (dp == ip || vp->v_mountedhere != 0) {
! 1254: if (dp == ip)
! 1255: vrele(dvp);
! 1256: else
! 1257: vput(dvp);
! 1258: vput(vp);
! 1259: return (EINVAL);
! 1260: }
! 1261: /*
! 1262: * Do not remove a directory that is in the process of being renamed.
! 1263: * Verify the directory is empty (and valid). Rmdir ".." will not be
! 1264: * valid since ".." will contain a reference to the current directory
! 1265: * and thus be non-empty.
! 1266: */
! 1267: error = 0;
! 1268: if (ip->i_flag & IN_RENAME) {
! 1269: error = EINVAL;
! 1270: goto out;
! 1271: }
! 1272: if (ip->i_effnlink != 2 ||
! 1273: !ufs_dirempty(ip, dp->i_number, cnp->cn_cred)) {
! 1274: error = ENOTEMPTY;
! 1275: goto out;
! 1276: }
! 1277: if ((DIP(dp, flags) & APPEND) ||
! 1278: (DIP(ip, flags) & (IMMUTABLE | APPEND))) {
! 1279: error = EPERM;
! 1280: goto out;
! 1281: }
! 1282: /*
! 1283: * Delete reference to directory before purging
! 1284: * inode. If we crash in between, the directory
! 1285: * will be reattached to lost+found,
! 1286: */
! 1287: dp->i_effnlink--;
! 1288: ip->i_effnlink--;
! 1289: if (DOINGSOFTDEP(vp)) {
! 1290: softdep_change_linkcnt(dp, 0);
! 1291: softdep_change_linkcnt(ip, 0);
! 1292: }
! 1293: if ((error = ufs_dirremove(dvp, ip, cnp->cn_flags, 1)) != 0) {
! 1294: dp->i_effnlink++;
! 1295: ip->i_effnlink++;
! 1296: if (DOINGSOFTDEP(vp)) {
! 1297: softdep_change_linkcnt(dp, 0);
! 1298: softdep_change_linkcnt(ip, 0);
! 1299: }
! 1300: goto out;
! 1301: }
! 1302:
! 1303: VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK);
! 1304: cache_purge(dvp);
! 1305: /*
! 1306: * Truncate inode. The only stuff left in the directory is "." and
! 1307: * "..". The "." reference is inconsequential since we are quashing
! 1308: * it. The soft dependency code will arrange to do these operations
! 1309: * after the parent directory entry has been deleted on disk, so
! 1310: * when running with that code we avoid doing them now.
! 1311: */
! 1312: if (!DOINGSOFTDEP(vp)) {
! 1313: int ioflag;
! 1314:
! 1315: DIP_ADD(dp, nlink, -1);
! 1316: dp->i_flag |= IN_CHANGE;
! 1317: DIP_ADD(ip, nlink, -1);
! 1318: ip->i_flag |= IN_CHANGE;
! 1319: ioflag = DOINGASYNC(vp) ? 0 : IO_SYNC;
! 1320: error = UFS_TRUNCATE(ip, (off_t)0, ioflag, cnp->cn_cred);
! 1321: }
! 1322: cache_purge(vp);
! 1323: #ifdef UFS_DIRHASH
! 1324: /* Kill any active hash; i_effnlink == 0, so it will not come back. */
! 1325: if (ip->i_dirhash != NULL)
! 1326: ufsdirhash_free(ip);
! 1327: #endif
! 1328:
! 1329: out:
! 1330: VN_KNOTE(vp, NOTE_DELETE);
! 1331: vput(dvp);
! 1332: vput(vp);
! 1333: return (error);
! 1334: }
! 1335:
! 1336: /*
! 1337: * symlink -- make a symbolic link
! 1338: */
! 1339: int
! 1340: ufs_symlink(void *v)
! 1341: {
! 1342: struct vop_symlink_args *ap = v;
! 1343: struct vnode *vp, **vpp = ap->a_vpp;
! 1344: struct inode *ip;
! 1345: int len, error;
! 1346:
! 1347: error = ufs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp,
! 1348: vpp, ap->a_cnp);
! 1349: if (error)
! 1350: return (error);
! 1351: VN_KNOTE(ap->a_dvp, NOTE_WRITE);
! 1352: vp = *vpp;
! 1353: len = strlen(ap->a_target);
! 1354: if (len < vp->v_mount->mnt_maxsymlinklen) {
! 1355: ip = VTOI(vp);
! 1356: bcopy(ap->a_target, (char *)SHORTLINK(ip), len);
! 1357: DIP_ASSIGN(ip, size, len);
! 1358: ip->i_flag |= IN_CHANGE | IN_UPDATE;
! 1359: } else
! 1360: error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0,
! 1361: UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred, NULL,
! 1362: (struct proc *)0);
! 1363: vput(vp);
! 1364: return (error);
! 1365: }
! 1366:
! 1367: /*
! 1368: * Vnode op for reading directories.
! 1369: *
! 1370: * The routine below assumes that the on-disk format of a directory
! 1371: * is the same as that defined by <sys/dirent.h>. If the on-disk
! 1372: * format changes, then it will be necessary to do a conversion
! 1373: * from the on-disk format that read returns to the format defined
! 1374: * by <sys/dirent.h>.
! 1375: */
! 1376: int
! 1377: ufs_readdir(void *v)
! 1378: {
! 1379: struct vop_readdir_args *ap = v;
! 1380: struct uio *uio = ap->a_uio;
! 1381: int error;
! 1382: size_t count, lost, entries;
! 1383: off_t off = uio->uio_offset;
! 1384:
! 1385: count = uio->uio_resid;
! 1386: entries = (uio->uio_offset + count) & (DIRBLKSIZ - 1);
! 1387:
! 1388: /* Make sure we don't return partial entries. */
! 1389: if (count <= entries)
! 1390: return (EINVAL);
! 1391:
! 1392: count -= entries;
! 1393: lost = uio->uio_resid - count;
! 1394: uio->uio_resid = count;
! 1395: uio->uio_iov->iov_len = count;
! 1396: # if (BYTE_ORDER == LITTLE_ENDIAN)
! 1397: if (ap->a_vp->v_mount->mnt_maxsymlinklen > 0) {
! 1398: error = VOP_READ(ap->a_vp, uio, 0, ap->a_cred);
! 1399: } else {
! 1400: struct dirent *dp, *edp;
! 1401: struct uio auio;
! 1402: struct iovec aiov;
! 1403: caddr_t dirbuf;
! 1404: int readcnt;
! 1405: u_char tmp;
! 1406:
! 1407: auio = *uio;
! 1408: auio.uio_iov = &aiov;
! 1409: auio.uio_iovcnt = 1;
! 1410: auio.uio_segflg = UIO_SYSSPACE;
! 1411: aiov.iov_len = count;
! 1412: MALLOC(dirbuf, caddr_t, count, M_TEMP, M_WAITOK);
! 1413: aiov.iov_base = dirbuf;
! 1414: error = VOP_READ(ap->a_vp, &auio, 0, ap->a_cred);
! 1415: if (error == 0) {
! 1416: readcnt = count - auio.uio_resid;
! 1417: edp = (struct dirent *)&dirbuf[readcnt];
! 1418: for (dp = (struct dirent *)dirbuf; dp < edp; ) {
! 1419: tmp = dp->d_namlen;
! 1420: dp->d_namlen = dp->d_type;
! 1421: dp->d_type = tmp;
! 1422: if (dp->d_reclen > 0) {
! 1423: dp = (struct dirent *)
! 1424: ((char *)dp + dp->d_reclen);
! 1425: } else {
! 1426: error = EIO;
! 1427: break;
! 1428: }
! 1429: }
! 1430: if (dp >= edp)
! 1431: error = uiomove(dirbuf, readcnt, uio);
! 1432: }
! 1433: FREE(dirbuf, M_TEMP);
! 1434: }
! 1435: # else
! 1436: error = VOP_READ(ap->a_vp, uio, 0, ap->a_cred);
! 1437: # endif
! 1438: if (!error && ap->a_ncookies) {
! 1439: struct dirent *dp, *dpstart;
! 1440: off_t offstart;
! 1441: u_long *cookies;
! 1442: int ncookies;
! 1443:
! 1444: /*
! 1445: * Only the NFS server and emulations use cookies, and they
! 1446: * load the directory block into system space, so we can
! 1447: * just look at it directly.
! 1448: */
! 1449: if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
! 1450: panic("ufs_readdir: lost in space");
! 1451:
! 1452: dpstart = (struct dirent *)
! 1453: ((char *)uio->uio_iov->iov_base -
! 1454: (uio->uio_offset - off));
! 1455: offstart = off;
! 1456: for (dp = dpstart, ncookies = 0; off < uio->uio_offset; ) {
! 1457: if (dp->d_reclen == 0)
! 1458: break;
! 1459: off += dp->d_reclen;
! 1460: ncookies++;
! 1461: dp = (struct dirent *)((caddr_t)dp + dp->d_reclen);
! 1462: }
! 1463: lost += uio->uio_offset - off;
! 1464: uio->uio_offset = off;
! 1465: MALLOC(cookies, u_long *, ncookies * sizeof(u_long), M_TEMP,
! 1466: M_WAITOK);
! 1467: *ap->a_ncookies = ncookies;
! 1468: *ap->a_cookies = cookies;
! 1469: for (off = offstart, dp = dpstart; off < uio->uio_offset; ) {
! 1470: off += dp->d_reclen;
! 1471: *cookies = off;
! 1472: cookies++;
! 1473: dp = (struct dirent *)((caddr_t)dp + dp->d_reclen);
! 1474: }
! 1475: }
! 1476:
! 1477: uio->uio_resid += lost;
! 1478: *ap->a_eofflag = DIP(VTOI(ap->a_vp), size) <= uio->uio_offset;
! 1479:
! 1480: return (error);
! 1481: }
! 1482:
! 1483: /*
! 1484: * Return target name of a symbolic link
! 1485: */
! 1486: int
! 1487: ufs_readlink(void *v)
! 1488: {
! 1489: struct vop_readlink_args *ap = v;
! 1490: struct vnode *vp = ap->a_vp;
! 1491: struct inode *ip = VTOI(vp);
! 1492: int isize;
! 1493:
! 1494: isize = DIP(ip, size);
! 1495: if (isize < vp->v_mount->mnt_maxsymlinklen ||
! 1496: (vp->v_mount->mnt_maxsymlinklen == 0 && DIP(ip, blocks) == 0)) {
! 1497: uiomove((char *)SHORTLINK(ip), isize, ap->a_uio);
! 1498: return (0);
! 1499: }
! 1500: return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred));
! 1501: }
! 1502:
! 1503: /*
! 1504: * Lock an inode. If its already locked, set the WANT bit and sleep.
! 1505: */
! 1506: int
! 1507: ufs_lock(void *v)
! 1508: {
! 1509: struct vop_lock_args *ap = v;
! 1510: struct vnode *vp = ap->a_vp;
! 1511:
! 1512: return (lockmgr(&VTOI(vp)->i_lock, ap->a_flags, NULL));
! 1513: }
! 1514:
! 1515: /*
! 1516: * Unlock an inode. If WANT bit is on, wakeup.
! 1517: */
! 1518: int
! 1519: ufs_unlock(void *v)
! 1520: {
! 1521: struct vop_unlock_args *ap = v;
! 1522: struct vnode *vp = ap->a_vp;
! 1523:
! 1524: return (lockmgr(&VTOI(vp)->i_lock, ap->a_flags | LK_RELEASE, NULL));
! 1525: }
! 1526:
! 1527: /*
! 1528: * Check for a locked inode.
! 1529: */
! 1530: int
! 1531: ufs_islocked(void *v)
! 1532: {
! 1533: struct vop_islocked_args *ap = v;
! 1534:
! 1535: return (lockstatus(&VTOI(ap->a_vp)->i_lock));
! 1536: }
! 1537:
! 1538: /*
! 1539: * Calculate the logical to physical mapping if not done already,
! 1540: * then call the device strategy routine.
! 1541: */
! 1542: int
! 1543: ufs_strategy(void *v)
! 1544: {
! 1545: struct vop_strategy_args *ap = v;
! 1546: struct buf *bp = ap->a_bp;
! 1547: struct vnode *vp = bp->b_vp;
! 1548: struct inode *ip;
! 1549: int error;
! 1550: int s;
! 1551:
! 1552: ip = VTOI(vp);
! 1553: if (vp->v_type == VBLK || vp->v_type == VCHR)
! 1554: panic("ufs_strategy: spec");
! 1555: if (bp->b_blkno == bp->b_lblkno) {
! 1556: error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno,
! 1557: NULL);
! 1558: if (error) {
! 1559: bp->b_error = error;
! 1560: bp->b_flags |= B_ERROR;
! 1561: s = splbio();
! 1562: biodone(bp);
! 1563: splx(s);
! 1564: return (error);
! 1565: }
! 1566: if ((long)bp->b_blkno == -1)
! 1567: clrbuf(bp);
! 1568: }
! 1569: if ((long)bp->b_blkno == -1) {
! 1570: s = splbio();
! 1571: biodone(bp);
! 1572: splx(s);
! 1573: return (0);
! 1574: }
! 1575: vp = ip->i_devvp;
! 1576: bp->b_dev = vp->v_rdev;
! 1577: VOCALL (vp->v_op, VOFFSET(vop_strategy), ap);
! 1578: return (0);
! 1579: }
! 1580:
! 1581: /*
! 1582: * Print out the contents of an inode.
! 1583: */
! 1584: int
! 1585: ufs_print(void *v)
! 1586: {
! 1587: #ifdef DIAGNOSTIC
! 1588: struct vop_print_args *ap = v;
! 1589:
! 1590: struct vnode *vp = ap->a_vp;
! 1591: struct inode *ip = VTOI(vp);
! 1592:
! 1593: printf("tag VT_UFS, ino %d, on dev %d, %d", ip->i_number,
! 1594: major(ip->i_dev), minor(ip->i_dev));
! 1595: printf(" flags 0x%x, effnlink %d, nlink %d\n",
! 1596: ip->i_flag, ip->i_effnlink, DIP(ip, nlink));
! 1597: printf("\tmode 0%o, owner %d, group %d, size %lld",
! 1598: DIP(ip, mode), DIP(ip, uid), DIP(ip, gid), DIP(ip, size));
! 1599:
! 1600: #ifdef FIFO
! 1601: if (vp->v_type == VFIFO)
! 1602: fifo_printinfo(vp);
! 1603: #endif /* FIFO */
! 1604: lockmgr_printinfo(&ip->i_lock);
! 1605: printf("\n");
! 1606:
! 1607: #endif /* DIAGNOSTIC */
! 1608:
! 1609: return (0);
! 1610: }
! 1611:
! 1612: /*
! 1613: * Read wrapper for special devices.
! 1614: */
! 1615: int
! 1616: ufsspec_read(void *v)
! 1617: {
! 1618: struct vop_read_args *ap = v;
! 1619:
! 1620: /*
! 1621: * Set access flag.
! 1622: */
! 1623: VTOI(ap->a_vp)->i_flag |= IN_ACCESS;
! 1624: return (VOCALL (spec_vnodeop_p, VOFFSET(vop_read), ap));
! 1625: }
! 1626:
! 1627: /*
! 1628: * Write wrapper for special devices.
! 1629: */
! 1630: int
! 1631: ufsspec_write(void *v)
! 1632: {
! 1633: struct vop_write_args *ap = v;
! 1634:
! 1635: /*
! 1636: * Set update and change flags.
! 1637: */
! 1638: VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE;
! 1639: return (VOCALL (spec_vnodeop_p, VOFFSET(vop_write), ap));
! 1640: }
! 1641:
! 1642: /*
! 1643: * Close wrapper for special devices.
! 1644: *
! 1645: * Update the times on the inode then do device close.
! 1646: */
! 1647: int
! 1648: ufsspec_close(void *v)
! 1649: {
! 1650: struct vop_close_args *ap = v;
! 1651: struct vnode *vp = ap->a_vp;
! 1652: struct inode *ip = VTOI(vp);
! 1653:
! 1654: if (ap->a_vp->v_usecount > 1) {
! 1655: struct timeval tv;
! 1656:
! 1657: getmicrotime(&tv);
! 1658: ITIMES(ip, &tv, &tv);
! 1659: }
! 1660: return (VOCALL (spec_vnodeop_p, VOFFSET(vop_close), ap));
! 1661: }
! 1662:
! 1663: #ifdef FIFO
! 1664: /*
! 1665: * Read wrapper for fifo's
! 1666: */
! 1667: int
! 1668: ufsfifo_read(void *v)
! 1669: {
! 1670: struct vop_read_args *ap = v;
! 1671: extern int (**fifo_vnodeop_p)(void *);
! 1672:
! 1673: /*
! 1674: * Set access flag.
! 1675: */
! 1676: VTOI(ap->a_vp)->i_flag |= IN_ACCESS;
! 1677: return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_read), ap));
! 1678: }
! 1679:
! 1680: /*
! 1681: * Write wrapper for fifo's.
! 1682: */
! 1683: int
! 1684: ufsfifo_write(void *v)
! 1685: {
! 1686: struct vop_write_args *ap = v;
! 1687: extern int (**fifo_vnodeop_p)(void *);
! 1688:
! 1689: /*
! 1690: * Set update and change flags.
! 1691: */
! 1692: VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE;
! 1693: return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_write), ap));
! 1694: }
! 1695:
! 1696: /*
! 1697: * Close wrapper for fifo's.
! 1698: *
! 1699: * Update the times on the inode then do device close.
! 1700: */
! 1701: int
! 1702: ufsfifo_close(void *v)
! 1703: {
! 1704: struct vop_close_args *ap = v;
! 1705: extern int (**fifo_vnodeop_p)(void *);
! 1706: struct vnode *vp = ap->a_vp;
! 1707: struct inode *ip = VTOI(vp);
! 1708:
! 1709: if (ap->a_vp->v_usecount > 1) {
! 1710: struct timeval tv;
! 1711:
! 1712: getmicrotime(&tv);
! 1713: ITIMES(ip, &tv, &tv);
! 1714: }
! 1715: return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_close), ap));
! 1716: }
! 1717: #endif /* FIFO */
! 1718:
! 1719: /*
! 1720: * Return POSIX pathconf information applicable to ufs filesystems.
! 1721: */
! 1722: int
! 1723: ufs_pathconf(void *v)
! 1724: {
! 1725: struct vop_pathconf_args *ap = v;
! 1726:
! 1727: switch (ap->a_name) {
! 1728: case _PC_LINK_MAX:
! 1729: *ap->a_retval = LINK_MAX;
! 1730: return (0);
! 1731: case _PC_NAME_MAX:
! 1732: *ap->a_retval = NAME_MAX;
! 1733: return (0);
! 1734: case _PC_PATH_MAX:
! 1735: *ap->a_retval = PATH_MAX;
! 1736: return (0);
! 1737: case _PC_PIPE_BUF:
! 1738: *ap->a_retval = PIPE_BUF;
! 1739: return (0);
! 1740: case _PC_CHOWN_RESTRICTED:
! 1741: *ap->a_retval = 1;
! 1742: return (0);
! 1743: case _PC_NO_TRUNC:
! 1744: *ap->a_retval = 1;
! 1745: return (0);
! 1746: default:
! 1747: return (EINVAL);
! 1748: }
! 1749: /* NOTREACHED */
! 1750: }
! 1751:
! 1752: /*
! 1753: * Advisory record locking support
! 1754: */
! 1755: int
! 1756: ufs_advlock(void *v)
! 1757: {
! 1758: struct vop_advlock_args *ap = v;
! 1759: struct inode *ip = VTOI(ap->a_vp);
! 1760:
! 1761: return (lf_advlock(&ip->i_lockf, DIP(ip, size), ap->a_id, ap->a_op,
! 1762: ap->a_fl, ap->a_flags));
! 1763: }
! 1764:
! 1765: /*
! 1766: * Initialize the vnode associated with a new inode, handle aliased
! 1767: * vnodes.
! 1768: */
! 1769: int
! 1770: ufs_vinit(struct mount *mntp, int (**specops)(void *),
! 1771: int (**fifoops)(void *), struct vnode **vpp)
! 1772: {
! 1773: struct inode *ip;
! 1774: struct vnode *vp, *nvp;
! 1775: struct timeval mtv;
! 1776:
! 1777: vp = *vpp;
! 1778: ip = VTOI(vp);
! 1779: switch(vp->v_type = IFTOVT(DIP(ip, mode))) {
! 1780: case VCHR:
! 1781: case VBLK:
! 1782: vp->v_op = specops;
! 1783: if ((nvp = checkalias(vp, DIP(ip, rdev), mntp)) != NULL) {
! 1784: /*
! 1785: * Discard unneeded vnode, but save its inode.
! 1786: * Note that the lock is carried over in the inode
! 1787: * to the replacement vnode.
! 1788: */
! 1789: nvp->v_data = vp->v_data;
! 1790: vp->v_data = NULL;
! 1791: vp->v_op = spec_vnodeop_p;
! 1792: #ifdef VFSDEBUG
! 1793: vp->v_flag &= ~VLOCKSWORK;
! 1794: #endif
! 1795: vrele(vp);
! 1796: vgone(vp);
! 1797: /*
! 1798: * Reinitialize aliased inode.
! 1799: */
! 1800: vp = nvp;
! 1801: ip->i_vnode = vp;
! 1802: }
! 1803: break;
! 1804: case VFIFO:
! 1805: #ifdef FIFO
! 1806: vp->v_op = fifoops;
! 1807: break;
! 1808: #else
! 1809: return (EOPNOTSUPP);
! 1810: #endif
! 1811: case VNON:
! 1812: case VBAD:
! 1813: case VSOCK:
! 1814: case VLNK:
! 1815: case VDIR:
! 1816: case VREG:
! 1817: break;
! 1818: }
! 1819: if (ip->i_number == ROOTINO)
! 1820: vp->v_flag |= VROOT;
! 1821: /*
! 1822: * Initialize modrev times
! 1823: */
! 1824: getmicrouptime(&mtv);
! 1825: SETHIGH(ip->i_modrev, mtv.tv_sec);
! 1826: SETLOW(ip->i_modrev, mtv.tv_usec * 4294);
! 1827: *vpp = vp;
! 1828: return (0);
! 1829: }
! 1830:
! 1831: /*
! 1832: * Allocate a new inode.
! 1833: */
! 1834: int
! 1835: ufs_makeinode(int mode, struct vnode *dvp, struct vnode **vpp,
! 1836: struct componentname *cnp)
! 1837: {
! 1838: struct inode *ip, *pdir;
! 1839: struct direct newdir;
! 1840: struct vnode *tvp;
! 1841: int error;
! 1842:
! 1843: pdir = VTOI(dvp);
! 1844: #ifdef DIAGNOSTIC
! 1845: if ((cnp->cn_flags & HASBUF) == 0)
! 1846: panic("ufs_makeinode: no name");
! 1847: #endif
! 1848: *vpp = NULL;
! 1849: if ((mode & IFMT) == 0)
! 1850: mode |= IFREG;
! 1851:
! 1852: if ((error = UFS_INODE_ALLOC(pdir, mode, cnp->cn_cred, &tvp)) != 0) {
! 1853: pool_put(&namei_pool, cnp->cn_pnbuf);
! 1854: vput(dvp);
! 1855: return (error);
! 1856: }
! 1857:
! 1858: ip = VTOI(tvp);
! 1859:
! 1860: DIP_ASSIGN(ip, gid, DIP(pdir, gid));
! 1861: DIP_ASSIGN(ip, uid, cnp->cn_cred->cr_uid);
! 1862:
! 1863: if ((error = getinoquota(ip)) ||
! 1864: (error = ufs_quota_alloc_inode(ip, cnp->cn_cred))) {
! 1865: pool_put(&namei_pool, cnp->cn_pnbuf);
! 1866: UFS_INODE_FREE(ip, ip->i_number, mode);
! 1867: vput(tvp);
! 1868: vput(dvp);
! 1869: return (error);
! 1870: }
! 1871:
! 1872: ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
! 1873: DIP_ASSIGN(ip, mode, mode);
! 1874: tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */
! 1875: ip->i_effnlink = 1;
! 1876: DIP_ASSIGN(ip, nlink, 1);
! 1877: if (DOINGSOFTDEP(tvp))
! 1878: softdep_change_linkcnt(ip, 0);
! 1879: if ((DIP(ip, mode) & ISGID) &&
! 1880: !groupmember(DIP(ip, gid), cnp->cn_cred) &&
! 1881: suser_ucred(cnp->cn_cred))
! 1882: DIP(ip, mode) &= ~ISGID;
! 1883:
! 1884: /*
! 1885: * Make sure inode goes to disk before directory entry.
! 1886: */
! 1887: if ((error = UFS_UPDATE(ip, !DOINGSOFTDEP(tvp))) != 0)
! 1888: goto bad;
! 1889:
! 1890: ufs_makedirentry(ip, cnp, &newdir);
! 1891: if ((error = ufs_direnter(dvp, tvp, &newdir, cnp, NULL)) != 0)
! 1892: goto bad;
! 1893:
! 1894: if ((cnp->cn_flags & SAVESTART) == 0)
! 1895: pool_put(&namei_pool, cnp->cn_pnbuf);
! 1896: vput(dvp);
! 1897: *vpp = tvp;
! 1898: return (0);
! 1899:
! 1900: bad:
! 1901: /*
! 1902: * Write error occurred trying to update the inode
! 1903: * or the directory so must deallocate the inode.
! 1904: */
! 1905: pool_put(&namei_pool, cnp->cn_pnbuf);
! 1906: vput(dvp);
! 1907: ip->i_effnlink = 0;
! 1908: DIP_ASSIGN(ip, nlink, 0);
! 1909: ip->i_flag |= IN_CHANGE;
! 1910: if (DOINGSOFTDEP(tvp))
! 1911: softdep_change_linkcnt(ip, 0);
! 1912: tvp->v_type = VNON;
! 1913: vput(tvp);
! 1914:
! 1915: return (error);
! 1916: }
! 1917:
! 1918: struct filterops ufsread_filtops =
! 1919: { 1, NULL, filt_ufsdetach, filt_ufsread };
! 1920: struct filterops ufswrite_filtops =
! 1921: { 1, NULL, filt_ufsdetach, filt_ufswrite };
! 1922: struct filterops ufsvnode_filtops =
! 1923: { 1, NULL, filt_ufsdetach, filt_ufsvnode };
! 1924:
! 1925: int
! 1926: ufs_kqfilter(void *v)
! 1927: {
! 1928: struct vop_kqfilter_args *ap = v;
! 1929: struct vnode *vp = ap->a_vp;
! 1930: struct knote *kn = ap->a_kn;
! 1931:
! 1932: switch (kn->kn_filter) {
! 1933: case EVFILT_READ:
! 1934: kn->kn_fop = &ufsread_filtops;
! 1935: break;
! 1936: case EVFILT_WRITE:
! 1937: kn->kn_fop = &ufswrite_filtops;
! 1938: break;
! 1939: case EVFILT_VNODE:
! 1940: kn->kn_fop = &ufsvnode_filtops;
! 1941: break;
! 1942: default:
! 1943: return (1);
! 1944: }
! 1945:
! 1946: kn->kn_hook = (caddr_t)vp;
! 1947:
! 1948: SLIST_INSERT_HEAD(&vp->v_selectinfo.si_note, kn, kn_selnext);
! 1949:
! 1950: return (0);
! 1951: }
! 1952:
! 1953: void
! 1954: filt_ufsdetach(struct knote *kn)
! 1955: {
! 1956: struct vnode *vp = (struct vnode *)kn->kn_hook;
! 1957:
! 1958: SLIST_REMOVE(&vp->v_selectinfo.si_note, kn, knote, kn_selnext);
! 1959: }
! 1960:
! 1961: /*ARGSUSED*/
! 1962: int
! 1963: filt_ufsread(struct knote *kn, long hint)
! 1964: {
! 1965: struct vnode *vp = (struct vnode *)kn->kn_hook;
! 1966: struct inode *ip = VTOI(vp);
! 1967:
! 1968: /*
! 1969: * filesystem is gone, so set the EOF flag and schedule
! 1970: * the knote for deletion.
! 1971: */
! 1972: if (hint == NOTE_REVOKE) {
! 1973: kn->kn_flags |= (EV_EOF | EV_ONESHOT);
! 1974: return (1);
! 1975: }
! 1976:
! 1977: kn->kn_data = DIP(ip, size) - kn->kn_fp->f_offset;
! 1978: if (kn->kn_data == 0 && kn->kn_sfflags & NOTE_EOF) {
! 1979: kn->kn_fflags |= NOTE_EOF;
! 1980: return (1);
! 1981: }
! 1982:
! 1983: return (kn->kn_data != 0);
! 1984: }
! 1985:
! 1986: int
! 1987: filt_ufswrite(struct knote *kn, long hint)
! 1988: {
! 1989: /*
! 1990: * filesystem is gone, so set the EOF flag and schedule
! 1991: * the knote for deletion.
! 1992: */
! 1993: if (hint == NOTE_REVOKE) {
! 1994: kn->kn_flags |= (EV_EOF | EV_ONESHOT);
! 1995: return (1);
! 1996: }
! 1997:
! 1998: kn->kn_data = 0;
! 1999: return (1);
! 2000: }
! 2001:
! 2002: int
! 2003: filt_ufsvnode(struct knote *kn, long hint)
! 2004: {
! 2005: if (kn->kn_sfflags & hint)
! 2006: kn->kn_fflags |= hint;
! 2007: if (hint == NOTE_REVOKE) {
! 2008: kn->kn_flags |= EV_EOF;
! 2009: return (1);
! 2010: }
! 2011: return (kn->kn_fflags != 0);
! 2012: }
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