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.
7 * Licensed under GPLv2, see file LICENSE in this source tree.
13 #include <linux/major.h>
18 #include "ext2fs/ext2_fs.h"
19 #include "ext2fs/ext2fs.h"
20 #include "blkid/blkid.h"
23 void proceed_question(void)
25 fputs("Proceed anyway? (y,n) ", stdout);
26 if (bb_ask_confirmation() == 0)
30 void check_plausibility(const char *device, int force)
34 val = stat(device, &s);
38 bb_perror_msg_and_die("can't stat '%s'", device);
39 if (!S_ISBLK(s.st_mode)) {
40 printf("%s is not a block special device.\n", device);
45 #ifdef HAVE_LINUX_MAJOR_H
47 #define MAJOR(dev) ((dev)>>8)
48 #define MINOR(dev) ((dev) & 0xff)
50 #ifndef SCSI_BLK_MAJOR
51 #ifdef SCSI_DISK0_MAJOR
52 #ifdef SCSI_DISK8_MAJOR
53 #define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
54 ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR) || \
55 ((M) >= SCSI_DISK8_MAJOR && (M) <= SCSI_DISK15_MAJOR))
57 #define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
58 ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR))
59 #endif /* defined(SCSI_DISK8_MAJOR) */
60 #define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) || (M) == SCSI_CDROM_MAJOR)
62 #define SCSI_BLK_MAJOR(M) ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR)
63 #endif /* defined(SCSI_DISK0_MAJOR) */
64 #endif /* defined(SCSI_BLK_MAJOR) */
65 if (((MAJOR(s.st_rdev) == HD_MAJOR &&
66 MINOR(s.st_rdev)%64 == 0) ||
67 (SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) &&
68 MINOR(s.st_rdev)%16 == 0))) {
69 printf("%s is entire device, not just one partition!\n", device);
75 void check_mount(const char *device, int force, const char *type)
80 retval = ext2fs_check_if_mounted(device, &mount_flags);
82 bb_error_msg("can't determine if %s is mounted", device);
85 if (mount_flags & EXT2_MF_MOUNTED) {
86 bb_error_msg("%s is mounted !", device);
89 bb_error_msg("badblocks forced anyways");
91 bb_error_msg_and_die("it's not safe to run badblocks!");
94 if (mount_flags & EXT2_MF_BUSY) {
95 bb_error_msg("%s is apparently in use by the system", device);
100 void parse_journal_opts(char **journal_device, int *journal_flags,
101 int *journal_size, const char *opts)
103 char *buf, *token, *next, *p, *arg;
104 int journal_usage = 0;
106 for (token = buf; token && *token; token = next) {
107 p = strchr(token, ',');
113 arg = strchr(token, '=');
118 if (strcmp(token, "device") == 0) {
119 *journal_device = blkid_get_devname(NULL, arg, NULL);
120 if (!journal_device) {
124 } else if (strcmp(token, "size") == 0) {
129 (*journal_size) = strtoul(arg, &p, 0);
132 } else if (strcmp(token, "v1_superblock") == 0) {
133 (*journal_flags) |= EXT2_MKJOURNAL_V1_SUPER;
139 bb_error_msg_and_die(
140 "\nBad journal options specified.\n\n"
141 "Journal options are separated by commas, "
142 "and may take an argument which\n"
143 "\tis set off by an equals ('=') sign.\n\n"
144 "Valid journal options are:\n"
145 "\tsize=<journal size in megabytes>\n"
146 "\tdevice=<journal device>\n\n"
147 "The journal size must be between "
148 "1024 and 102400 filesystem blocks.\n\n");
152 * Determine the number of journal blocks to use, either via
153 * user-specified # of megabytes, or via some intelligently selected
156 * Find a reasonable journal file size (in blocks) given the number of blocks
157 * in the filesystem. For very small filesystems, it is not reasonable to
158 * have a journal that fills more than half of the filesystem.
160 int figure_journal_size(int size, ext2_filsys fs)
164 if (fs->super->s_blocks_count < 2048) {
165 bb_error_msg("Filesystem too small for a journal");
170 j_blocks = size * 1024 / (fs->blocksize / 1024);
171 if (j_blocks < 1024 || j_blocks > 102400)
172 bb_error_msg_and_die("\nThe requested journal "
173 "size is %d blocks;\n it must be "
174 "between 1024 and 102400 blocks; Aborting",
176 if (j_blocks > fs->super->s_free_blocks_count)
177 bb_error_msg_and_die("Journal size too big for filesystem");
181 if (fs->super->s_blocks_count < 32768)
183 else if (fs->super->s_blocks_count < 256*1024)
185 else if (fs->super->s_blocks_count < 512*1024)
187 else if (fs->super->s_blocks_count < 1024*1024)
195 void print_check_message(ext2_filsys fs)
197 printf("This filesystem will be automatically "
198 "checked every %d mounts or\n"
199 "%g days, whichever comes first. "
200 "Use tune2fs -c or -i to override.\n",
201 fs->super->s_max_mnt_count,
202 (double)fs->super->s_checkinterval / (3600 * 24));
205 void make_journal_device(char *journal_device, ext2_filsys fs, int quiet, int force)
211 check_plausibility(journal_device, force);
212 check_mount(journal_device, force, "journal");
213 io_ptr = unix_io_manager;
214 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
215 EXT2_FLAG_JOURNAL_DEV_OK, 0,
216 fs->blocksize, io_ptr, &jfs);
218 bb_error_msg_and_die("can't journal device %s", journal_device);
220 printf("Adding journal to device %s: ", journal_device);
222 retval = ext2fs_add_journal_device(fs, jfs);
224 bb_error_msg_and_die("\nFailed to add journal to device %s", journal_device);
230 void make_journal_blocks(ext2_filsys fs, int journal_size, int journal_flags, int quiet)
232 unsigned long journal_blocks;
235 journal_blocks = figure_journal_size(journal_size, fs);
236 if (!journal_blocks) {
237 fs->super->s_feature_compat &=
238 ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
242 printf("Creating journal (%ld blocks): ", journal_blocks);
244 retval = ext2fs_add_journal_inode(fs, journal_blocks,
247 bb_error_msg_and_die("can't create journal");
252 char *e2fs_set_sbin_path(void)
254 char *oldpath = getenv("PATH");
255 /* Update our PATH to include /sbin */
256 #define PATH_SET "/sbin"
258 oldpath = xasprintf("%s:%s", PATH_SET, oldpath);