1 /* vi: set sw=4 ts=4: */
3 * util.c --- helper functions used by tune2fs and mke2fs
5 * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o.
8 * This file may be redistributed under the terms of the GNU Public
16 #include <linux/major.h>
21 #include "ext2fs/ext2_fs.h"
22 #include "ext2fs/ext2fs.h"
23 #include "blkid/blkid.h"
26 void proceed_question(void)
28 fputs("Proceed anyway? (y,n) ", stdout);
29 if (bb_ask_confirmation() == 0)
33 void check_plausibility(const char *device, int force)
37 val = stat(device, &s);
41 bb_perror_msg_and_die("cannot stat %s", device);
42 if (!S_ISBLK(s.st_mode)) {
43 printf("%s is not a block special device.\n", device);
48 #ifdef HAVE_LINUX_MAJOR_H
50 #define MAJOR(dev) ((dev)>>8)
51 #define MINOR(dev) ((dev) & 0xff)
53 #ifndef SCSI_BLK_MAJOR
54 #ifdef SCSI_DISK0_MAJOR
55 #ifdef SCSI_DISK8_MAJOR
56 #define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
57 ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR) || \
58 ((M) >= SCSI_DISK8_MAJOR && (M) <= SCSI_DISK15_MAJOR))
60 #define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
61 ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR))
62 #endif /* defined(SCSI_DISK8_MAJOR) */
63 #define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) || (M) == SCSI_CDROM_MAJOR)
65 #define SCSI_BLK_MAJOR(M) ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR)
66 #endif /* defined(SCSI_DISK0_MAJOR) */
67 #endif /* defined(SCSI_BLK_MAJOR) */
68 if (((MAJOR(s.st_rdev) == HD_MAJOR &&
69 MINOR(s.st_rdev)%64 == 0) ||
70 (SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) &&
71 MINOR(s.st_rdev)%16 == 0))) {
72 printf("%s is entire device, not just one partition!\n", device);
78 void check_mount(const char *device, int force, const char *type)
83 retval = ext2fs_check_if_mounted(device, &mount_flags);
85 bb_error_msg("cannot determine if %s is mounted", device);
88 if (mount_flags & EXT2_MF_MOUNTED) {
89 bb_error_msg("%s is mounted !", device);
92 bb_error_msg("badblocks forced anyways");
94 bb_error_msg_and_die("it's not safe to run badblocks!");
97 if (mount_flags & EXT2_MF_BUSY) {
98 bb_error_msg("%s is apparently in use by the system", device);
104 void parse_journal_opts(char **journal_device, int *journal_flags,
105 int *journal_size, const char *opts)
107 char *buf, *token, *next, *p, *arg;
108 int journal_usage = 0;
110 for (token = buf; token && *token; token = next) {
111 p = strchr(token, ',');
117 arg = strchr(token, '=');
122 if (strcmp(token, "device") == 0) {
123 *journal_device = blkid_get_devname(NULL, arg, NULL);
124 if (!journal_device) {
128 } else if (strcmp(token, "size") == 0) {
133 (*journal_size) = strtoul(arg, &p, 0);
136 } else if (strcmp(token, "v1_superblock") == 0) {
137 (*journal_flags) |= EXT2_MKJOURNAL_V1_SUPER;
143 bb_error_msg_and_die(
144 "\nBad journal options specified.\n\n"
145 "Journal options are separated by commas, "
146 "and may take an argument which\n"
147 "\tis set off by an equals ('=') sign.\n\n"
148 "Valid journal options are:\n"
149 "\tsize=<journal size in megabytes>\n"
150 "\tdevice=<journal device>\n\n"
151 "The journal size must be between "
152 "1024 and 102400 filesystem blocks.\n\n");
156 * Determine the number of journal blocks to use, either via
157 * user-specified # of megabytes, or via some intelligently selected
160 * Find a reasonable journal file size (in blocks) given the number of blocks
161 * in the filesystem. For very small filesystems, it is not reasonable to
162 * have a journal that fills more than half of the filesystem.
164 int figure_journal_size(int size, ext2_filsys fs)
168 if (fs->super->s_blocks_count < 2048) {
169 bb_error_msg("Filesystem too small for a journal");
174 j_blocks = size * 1024 / (fs->blocksize / 1024);
175 if (j_blocks < 1024 || j_blocks > 102400)
176 bb_error_msg_and_die("\nThe requested journal "
177 "size is %d blocks;\n it must be "
178 "between 1024 and 102400 blocks; Aborting",
180 if (j_blocks > fs->super->s_free_blocks_count)
181 bb_error_msg_and_die("Journal size too big for filesystem");
185 if (fs->super->s_blocks_count < 32768)
187 else if (fs->super->s_blocks_count < 256*1024)
189 else if (fs->super->s_blocks_count < 512*1024)
191 else if (fs->super->s_blocks_count < 1024*1024)
199 void print_check_message(ext2_filsys fs)
201 printf("This filesystem will be automatically "
202 "checked every %d mounts or\n"
203 "%g days, whichever comes first. "
204 "Use tune2fs -c or -i to override.\n",
205 fs->super->s_max_mnt_count,
206 (double)fs->super->s_checkinterval / (3600 * 24));
209 void make_journal_device(char *journal_device, ext2_filsys fs, int quiet, int force)
215 check_plausibility(journal_device, force);
216 check_mount(journal_device, force, "journal");
217 io_ptr = unix_io_manager;
218 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
219 EXT2_FLAG_JOURNAL_DEV_OK, 0,
220 fs->blocksize, io_ptr, &jfs);
222 bb_error_msg_and_die("cannot journal device %s", journal_device);
224 printf("Adding journal to device %s: ", journal_device);
226 retval = ext2fs_add_journal_device(fs, jfs);
228 bb_error_msg_and_die("\nFailed to add journal to device %s", journal_device);
234 void make_journal_blocks(ext2_filsys fs, int journal_size, int journal_flags, int quiet)
236 unsigned long journal_blocks;
239 journal_blocks = figure_journal_size(journal_size, fs);
240 if (!journal_blocks) {
241 fs->super->s_feature_compat &=
242 ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
246 printf("Creating journal (%ld blocks): ", journal_blocks);
248 retval = ext2fs_add_journal_inode(fs, journal_blocks,
251 bb_error_msg_and_die("cannot create journal");
256 char *e2fs_set_sbin_path(void)
258 char *oldpath = getenv("PATH");
259 /* Update our PATH to include /sbin */
260 #define PATH_SET "/sbin"
262 oldpath = xasprintf("%s:%s", PATH_SET, oldpath);