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10#include <stdio.h>
11#include <string.h>
12#include <errno.h>
13#include <linux/major.h>
14#include <sys/stat.h>
15
16#include "e2fsbb.h"
17#include "e2p/e2p.h"
18#include "ext2fs/ext2_fs.h"
19#include "ext2fs/ext2fs.h"
20#include "blkid/blkid.h"
21#include "util.h"
22
23void proceed_question(void)
24{
25 fputs("Proceed anyway? (y,n) ", stdout);
26 if (bb_ask_confirmation() == 0)
27 exit(1);
28}
29
30void check_plausibility(const char *device, int force)
31{
32 int val;
33 struct stat s;
34 val = stat(device, &s);
35 if (force)
36 return;
37 if (val == -1)
38 bb_perror_msg_and_die("cannot stat %s", device);
39 if (!S_ISBLK(s.st_mode)) {
40 printf("%s is not a block special device.\n", device);
41 proceed_question();
42 return;
43 }
44
45#ifdef HAVE_LINUX_MAJOR_H
46#ifndef MAJOR
47#define MAJOR(dev) ((dev)>>8)
48#define MINOR(dev) ((dev) & 0xff)
49#endif
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))
56#else
57#define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \
58 ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR))
59#endif
60#define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) || (M) == SCSI_CDROM_MAJOR)
61#else
62#define SCSI_BLK_MAJOR(M) ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR)
63#endif
64#endif
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);
70 proceed_question();
71 }
72#endif
73}
74
75void check_mount(const char *device, int force, const char *type)
76{
77 errcode_t retval;
78 int mount_flags;
79
80 retval = ext2fs_check_if_mounted(device, &mount_flags);
81 if (retval) {
82 bb_error_msg("cannot determine if %s is mounted", device);
83 return;
84 }
85 if (mount_flags & EXT2_MF_MOUNTED) {
86 bb_error_msg("%s is mounted !", device);
87force_check:
88 if (force)
89 bb_error_msg("badblocks forced anyways");
90 else
91 bb_error_msg_and_die("it's not safe to run badblocks!");
92 }
93
94 if (mount_flags & EXT2_MF_BUSY) {
95 bb_error_msg("%s is apparently in use by the system", device);
96 goto force_check;
97 }
98
99}
100
101void parse_journal_opts(char **journal_device, int *journal_flags,
102 int *journal_size, const char *opts)
103{
104 char *buf, *token, *next, *p, *arg;
105 int journal_usage = 0;
106 buf = xstrdup(opts);
107 for (token = buf; token && *token; token = next) {
108 p = strchr(token, ',');
109 next = 0;
110 if (p) {
111 *p = 0;
112 next = p+1;
113 }
114 arg = strchr(token, '=');
115 if (arg) {
116 *arg = 0;
117 arg++;
118 }
119 if (strcmp(token, "device") == 0) {
120 *journal_device = blkid_get_devname(NULL, arg, NULL);
121 if (!journal_device) {
122 journal_usage++;
123 continue;
124 }
125 } else if (strcmp(token, "size") == 0) {
126 if (!arg) {
127 journal_usage++;
128 continue;
129 }
130 (*journal_size) = strtoul(arg, &p, 0);
131 if (*p)
132 journal_usage++;
133 } else if (strcmp(token, "v1_superblock") == 0) {
134 (*journal_flags) |= EXT2_MKJOURNAL_V1_SUPER;
135 continue;
136 } else
137 journal_usage++;
138 }
139 if (journal_usage)
140 bb_error_msg_and_die(
141 "\nBad journal options specified.\n\n"
142 "Journal options are separated by commas, "
143 "and may take an argument which\n"
144 "\tis set off by an equals ('=') sign.\n\n"
145 "Valid journal options are:\n"
146 "\tsize=<journal size in megabytes>\n"
147 "\tdevice=<journal device>\n\n"
148 "The journal size must be between "
149 "1024 and 102400 filesystem blocks.\n\n");
150}
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159
160
161int figure_journal_size(int size, ext2_filsys fs)
162{
163 blk_t j_blocks;
164
165 if (fs->super->s_blocks_count < 2048) {
166 bb_error_msg("Filesystem too small for a journal");
167 return 0;
168 }
169
170 if (size >= 0) {
171 j_blocks = size * 1024 / (fs->blocksize / 1024);
172 if (j_blocks < 1024 || j_blocks > 102400)
173 bb_error_msg_and_die("\nThe requested journal "
174 "size is %d blocks;\n it must be "
175 "between 1024 and 102400 blocks; Aborting",
176 j_blocks);
177 if (j_blocks > fs->super->s_free_blocks_count)
178 bb_error_msg_and_die("Journal size too big for filesystem");
179 return j_blocks;
180 }
181
182 if (fs->super->s_blocks_count < 32768)
183 j_blocks = 1024;
184 else if (fs->super->s_blocks_count < 256*1024)
185 j_blocks = 4096;
186 else if (fs->super->s_blocks_count < 512*1024)
187 j_blocks = 8192;
188 else if (fs->super->s_blocks_count < 1024*1024)
189 j_blocks = 16384;
190 else
191 j_blocks = 32768;
192
193 return j_blocks;
194}
195
196void print_check_message(ext2_filsys fs)
197{
198 printf("This filesystem will be automatically "
199 "checked every %d mounts or\n"
200 "%g days, whichever comes first. "
201 "Use tune2fs -c or -i to override.\n",
202 fs->super->s_max_mnt_count,
203 (double)fs->super->s_checkinterval / (3600 * 24));
204}
205
206void make_journal_device(char *journal_device, ext2_filsys fs, int quiet, int force)
207{
208 errcode_t retval;
209 ext2_filsys jfs;
210 io_manager io_ptr;
211
212 check_plausibility(journal_device, force);
213 check_mount(journal_device, force, "journal");
214 io_ptr = unix_io_manager;
215 retval = ext2fs_open(journal_device, EXT2_FLAG_RW|
216 EXT2_FLAG_JOURNAL_DEV_OK, 0,
217 fs->blocksize, io_ptr, &jfs);
218 if (retval)
219 bb_error_msg_and_die("cannot journal device %s", journal_device);
220 if (!quiet)
221 printf("Adding journal to device %s: ", journal_device);
222 fflush(stdout);
223 retval = ext2fs_add_journal_device(fs, jfs);
224 if (retval)
225 bb_error_msg_and_die("\nFailed to add journal to device %s", journal_device);
226 if (!quiet)
227 puts("done");
228 ext2fs_close(jfs);
229}
230
231void make_journal_blocks(ext2_filsys fs, int journal_size, int journal_flags, int quiet)
232{
233 unsigned long journal_blocks;
234 errcode_t retval;
235
236 journal_blocks = figure_journal_size(journal_size, fs);
237 if (!journal_blocks) {
238 fs->super->s_feature_compat &=
239 ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
240 return;
241 }
242 if (!quiet)
243 printf("Creating journal (%ld blocks): ", journal_blocks);
244 fflush(stdout);
245 retval = ext2fs_add_journal_inode(fs, journal_blocks,
246 journal_flags);
247 if (retval)
248 bb_error_msg_and_die("cannot create journal");
249 if (!quiet)
250 puts("done");
251}
252
253char *e2fs_set_sbin_path(void)
254{
255 char *oldpath = getenv("PATH");
256
257#define PATH_SET "/sbin"
258 if (oldpath)
259 oldpath = xasprintf("%s:%s", PATH_SET, oldpath);
260 else
261 oldpath = PATH_SET;
262 putenv(oldpath);
263 return oldpath;
264}
265
