+/*
+ * Copyright (c) 1999-2001 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License"). You may not use this file except in compliance with the
+ * License. Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
+ *
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+/*
+ Copyright (c) 2002 Apple Computer, Inc.
+ All Rights Reserved.
+
+ This file contains the routine to make an HFS+ volume journaled
+ and a corresponding routine to turn it off.
+
+ */
+
+#include <sys/types.h>
+#include <sys/attr.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/sysctl.h>
+#include <sys/resource.h>
+#include <sys/vmmeter.h>
+#include <sys/mount.h>
+#include <sys/wait.h>
+
+#include <dev/disk.h>
+#include <sys/loadable_fs.h>
+#include <hfs/hfs_format.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <libgen.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <architecture/byte_order.h>
+
+//
+// Secret HFS sysctl's to instruct it to turn
+// journaling on/off for a volume.
+//
+#define HFS_BECOME_JOURNALED 0x082969
+#define HFS_BECOME_UNJOURNALED 0x031272
+
+
+/* getattrlist buffers start with an extra length field */
+struct ExtentsAttrBuf {
+ unsigned long infoLength;
+ HFSPlusExtentRecord extents;
+};
+typedef struct ExtentsAttrBuf ExtentsAttrBuf;
+
+
+
+#define kIsInvisible 0x4000
+
+/*
+ * Generic Finder file/dir data
+ */
+struct FinderInfo {
+ u_int32_t opaque_1[2];
+ u_int16_t fdFlags; /* Finder flags */
+ int16_t opaque_2[11];
+};
+typedef struct FinderInfo FinderInfo;
+
+/* getattrlist buffers start with an extra length field */
+struct FinderAttrBuf {
+ unsigned long infoLength;
+ FinderInfo finderInfo;
+};
+typedef struct FinderAttrBuf FinderAttrBuf;
+
+
+int hide_file(const char * file)
+{
+ struct attrlist alist = {0};
+ FinderAttrBuf finderInfoBuf = {0};
+ int result;
+
+ alist.bitmapcount = ATTR_BIT_MAP_COUNT;
+ alist.commonattr = ATTR_CMN_FNDRINFO;
+
+ result = getattrlist(file, &alist, &finderInfoBuf, sizeof(finderInfoBuf), 0);
+ if (result) {
+ return (errno);
+ }
+
+ if (finderInfoBuf.finderInfo.fdFlags & kIsInvisible) {
+ printf("hide: %s is alreadly invisible\n", file);
+ return (0);
+ }
+
+ finderInfoBuf.finderInfo.fdFlags |= kIsInvisible;
+
+ result = setattrlist(file, &alist, &finderInfoBuf.finderInfo, sizeof(FinderInfo), 0);
+
+ return (result == -1 ? errno : result);
+}
+
+int
+get_start_block(const char *file)
+{
+ struct attrlist alist = {0};
+ ExtentsAttrBuf extentsbuf = {0};
+
+ alist.bitmapcount = ATTR_BIT_MAP_COUNT;
+ alist.fileattr = ATTR_FILE_DATAEXTENTS;
+
+ if (getattrlist(file, &alist, &extentsbuf, sizeof(extentsbuf), 0)) {
+ fprintf(stderr, "could not get attrlist for %s (%s)", file, strerror(errno));
+ return -1;
+ }
+
+ if (extentsbuf.extents[1].startBlock != 0) {
+ fprintf(stderr, "Journal File not contiguous!\n");
+ return -1;
+ }
+
+ return extentsbuf.extents[0].startBlock;
+}
+
+static const char *journal_fname = ".journal";
+static const char *jib_fname = ".journal_info_block";
+
+int
+DoMakeJournaled(char *volname, int jsize)
+{
+ int fd, i, block_size, journal_size = 8*1024*1024;
+ char *buf;
+ int ret;
+ fstore_t fst;
+ int jstart_block, jinfo_block, sysctl_info[8];
+ JournalInfoBlock jib;
+ struct statfs sfs;
+ static char tmpname[MAXPATHLEN];
+
+ if (jsize != 0) {
+ journal_size = jsize;
+ }
+
+ if (statfs(volname, &sfs) != 0) {
+ fprintf(stderr, "Can't stat volume %s (%s).\n", volname, strerror(errno));
+ return 10;
+ }
+
+ // Make sure that we're HFS+. First we check the fstypename.
+ // If that's ok then we try to create a symlink (which won't
+ // work on plain hfs volumes but will work on hfs+ volumes).
+ //
+ sprintf(tmpname, "%s/is_vol_hfs_plus", volname);
+ if (strcmp(sfs.f_fstypename, "hfs") != 0 ||
+ ((ret = symlink(tmpname, tmpname)) != 0 && errno == ENOTSUP)) {
+ fprintf(stderr, "%s is not an HFS+ volume. Journaling only works on HFS+ volumes.\n",
+ volname);
+ return 10;
+ }
+ unlink(tmpname);
+
+ if (sfs.f_flags & MNT_JOURNALED) {
+ fprintf(stderr, "Volume %s is already journaled.\n", volname);
+ return 1;
+ }
+
+ if (chdir(volname) != 0) {
+ fprintf(stderr, "Can't locate volume %s to make it journaled (%s).\n",
+ volname, strerror(errno));
+ return 10;
+ }
+
+ fd = open(journal_fname, O_CREAT|O_TRUNC|O_RDWR, 000);
+ if (fd < 0) {
+ fprintf(stderr, "Can't create journal file on volume %s (%s)\n",
+ volname, strerror(errno));
+ return 5;
+ }
+
+ // make sure that it has no r/w/x privs (only could happen if
+ // the file already existed since open() doesn't reset the mode
+ // bits).
+ //
+ fchmod(fd, 0);
+
+ block_size = sfs.f_bsize;
+ if ((journal_size % block_size) != 0) {
+ fprintf(stderr, "Journal size %dk is not a multiple of volume %s block size (%d).\n",
+ journal_size/1024, volname, block_size);
+ close(fd);
+ unlink(journal_fname);
+ return 5;
+ }
+
+ memset(&fst, 0, sizeof(fst));
+ fst.fst_flags = F_ALLOCATECONTIG|F_ALLOCATEALL;
+ fst.fst_length = journal_size;
+ fst.fst_posmode = F_PEOFPOSMODE;
+
+ ret = fcntl(fd, F_PREALLOCATE, &fst);
+ if (ret < 0) {
+ fprintf(stderr, "Pre-allocating the journal file failed on volume %s (%s)\n",
+ volname, strerror(errno));
+ fprintf(stderr, "Try using a smaller (%d k) journal size\n", journal_size/2/1024);
+ close(fd);
+ unlink(journal_fname);
+ return 10;
+ }
+
+ printf("Allocated %lldK for journal file.\n", fst.fst_bytesalloc/1024LL);
+ buf = (char *)calloc(block_size, 1);
+ if (buf) {
+ for(i=0; i < journal_size/block_size; i++) {
+ ret = write(fd, buf, block_size);
+ if (ret != block_size) {
+ break;
+ }
+ }
+
+ if (i*block_size != journal_size) {
+ fprintf(stderr, "Failed to write %dk to journal on volume %s (%s)\n",
+ journal_size/1024, volname, strerror(errno));
+ }
+ } else {
+ printf("Could not allocate memory to write to the journal on volume %s (%s)\n",
+ volname, strerror(errno));
+ }
+
+ fsync(fd);
+ close(fd);
+ hide_file(journal_fname);
+
+ jstart_block = get_start_block(journal_fname);
+
+ memset(&jib, 0, sizeof(jib));
+ jib.flags = kJIJournalInFSMask;
+ jib.offset = (off_t)jstart_block * (off_t)block_size;
+ jib.size = (off_t)journal_size;
+
+ fd = open(jib_fname, O_CREAT|O_TRUNC|O_RDWR, 000);
+ if (fd < 0) {
+ fprintf(stderr, "Could not create journal info block file on volume %s (%s)\n",
+ volname, strerror(errno));
+ unlink(journal_fname);
+ return 5;
+ }
+
+ memcpy(buf, &jib, sizeof(jib));
+ if (write(fd, buf, block_size) != block_size) {
+ fprintf(stderr, "Failed to write journal info block on volume %s (%s)!\n",
+ volname, strerror(errno));
+ unlink(journal_fname);
+ return 10;
+ }
+
+ fsync(fd);
+ close(fd);
+ hide_file(jib_fname);
+
+ jinfo_block = get_start_block(jib_fname);
+
+
+ //
+ // Now make the volume journaled!
+ //
+ memset(sysctl_info, 0, sizeof(sysctl_info));
+ sysctl_info[0] = CTL_VFS;
+ sysctl_info[1] = sfs.f_fsid.val[1];
+ sysctl_info[2] = HFS_BECOME_JOURNALED;
+ sysctl_info[3] = jinfo_block;
+ sysctl_info[4] = jstart_block;
+ sysctl_info[5] = journal_size;
+
+ //printf("fs type: 0x%x\n", sysctl_info[1]);
+ //printf("jinfo block : 0x%x\n", jinfo_block);
+ //printf("jstart block: 0x%x\n", jstart_block);
+ //printf("journal size: 0x%x\n", journal_size);
+
+ ret = sysctl((void *)sysctl_info, 6, NULL, NULL, NULL, 0);
+ if (ret != 0) {
+ fprintf(stderr, "Failed to make volume %s journaled (%s)\n",
+ volname, strerror(errno));
+ unlink(journal_fname);
+ unlink(jib_fname);
+ return 20;
+ }
+
+ return 0;
+}
+
+
+int
+DoUnJournal(char *volname)
+{
+ int result;
+ int sysctl_info[8];
+ struct statfs sfs;
+ char jbuf[MAXPATHLEN];
+
+ if (statfs(volname, &sfs) != 0) {
+ fprintf(stderr, "Can't stat volume %s (%s).\n", volname, strerror(errno));
+ return 10;
+ }
+
+ if ((sfs.f_flags & MNT_JOURNALED) == 0) {
+ fprintf(stderr, "Volume %s is not journaled.\n", volname);
+ return 1;
+ }
+
+ if (chdir(volname) != 0) {
+ fprintf(stderr, "Can't locate volume %s to turn off journaling (%s).\n",
+ volname, strerror(errno));
+ return 10;
+ }
+
+ memset(sysctl_info, 0, sizeof(sysctl_info));
+ sysctl_info[0] = CTL_VFS;
+ sysctl_info[1] = sfs.f_fsid.val[1];
+ sysctl_info[2] = HFS_BECOME_UNJOURNALED;
+
+ result = sysctl((void *)sysctl_info, 6, NULL, NULL, NULL, 0);
+ if (result != 0) {
+ fprintf(stderr, "Failed to make volume %s UN-journaled (%s)\n",
+ volname, strerror(errno));
+ return 20;
+ }
+
+ sprintf(jbuf, "%s/%s", volname, journal_fname);
+ if (unlink(jbuf) != 0) {
+ fprintf(stderr, "Failed to remove the journal %s (%s)\n",
+ jbuf, strerror(errno));
+ }
+
+ sprintf(jbuf, "%s/%s", volname, jib_fname);
+ if (unlink(jbuf) != 0) {
+ fprintf(stderr, "Failed to remove the journal info block %s (%s)\n",
+ jbuf, strerror(errno));
+ }
+
+ printf("Journaling disabled on %s\n", volname);
+
+ return 0;
+}
projects / apple / hfs.git / commitdiff
