1 /*
2 * main.c --- ext2 resizer main program
3 *
4 * Copyright (C) 1997, 1998 by Theodore Ts'o and
5 * PowerQuest, Inc.
6 *
7 * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004 by Theodore Ts'o
8 *
9 * %Begin-Header%
10 * This file may be redistributed under the terms of the GNU Public
11 * License.
12 * %End-Header%
13 */
14
15 #define _LARGEFILE_SOURCE
16 #define _LARGEFILE64_SOURCE
17
18 #ifdef HAVE_GETOPT_H
19 #include <getopt.h>
20 #else
21 extern char *optarg;
22 extern int optind;
23 #endif
24 #include <unistd.h>
25 #include <sys/types.h>
26 #include <sys/stat.h>
27 #include <fcntl.h>
28
29 #include "e2p/e2p.h"
30
31 #include "resize2fs.h"
32
33 #include "../version.h"
34
35 char *program_name, *device_name, *io_options;
36
usage(char * prog)37 static void usage (char *prog)
38 {
39 fprintf (stderr, _("Usage: %s [-d debug_flags] [-f] [-F] [-p] "
40 "device [new_size]\n\n"), prog);
41
42 exit (1);
43 }
44
resize_progress_func(ext2_resize_t rfs,int pass,unsigned long cur,unsigned long max)45 static errcode_t resize_progress_func(ext2_resize_t rfs, int pass,
46 unsigned long cur, unsigned long max)
47 {
48 ext2_sim_progmeter progress;
49 const char *label;
50 errcode_t retval;
51
52 progress = (ext2_sim_progmeter) rfs->prog_data;
53 if (max == 0)
54 return 0;
55 if (cur == 0) {
56 if (progress)
57 ext2fs_progress_close(progress);
58 progress = 0;
59 switch (pass) {
60 case E2_RSZ_EXTEND_ITABLE_PASS:
61 label = _("Extending the inode table");
62 break;
63 case E2_RSZ_BLOCK_RELOC_PASS:
64 label = _("Relocating blocks");
65 break;
66 case E2_RSZ_INODE_SCAN_PASS:
67 label = _("Scanning inode table");
68 break;
69 case E2_RSZ_INODE_REF_UPD_PASS:
70 label = _("Updating inode references");
71 break;
72 case E2_RSZ_MOVE_ITABLE_PASS:
73 label = _("Moving inode table");
74 break;
75 default:
76 label = _("Unknown pass?!?");
77 break;
78 }
79 printf(_("Begin pass %d (max = %lu)\n"), pass, max);
80 retval = ext2fs_progress_init(&progress, label, 30,
81 40, max, 0);
82 if (retval)
83 progress = 0;
84 rfs->prog_data = (void *) progress;
85 }
86 if (progress)
87 ext2fs_progress_update(progress, cur);
88 if (cur >= max) {
89 if (progress)
90 ext2fs_progress_close(progress);
91 progress = 0;
92 rfs->prog_data = 0;
93 }
94 return 0;
95 }
96
determine_fs_stride(ext2_filsys fs)97 static void determine_fs_stride(ext2_filsys fs)
98 {
99 unsigned int group;
100 unsigned long long sum;
101 unsigned int has_sb, prev_has_sb, num;
102 int i_stride, b_stride;
103
104 if (fs->stride)
105 return;
106 num = 0; sum = 0;
107 for (group = 0; group < fs->group_desc_count; group++) {
108 has_sb = ext2fs_bg_has_super(fs, group);
109 if (group == 0 || has_sb != prev_has_sb)
110 goto next;
111 b_stride = fs->group_desc[group].bg_block_bitmap -
112 fs->group_desc[group-1].bg_block_bitmap -
113 fs->super->s_blocks_per_group;
114 i_stride = fs->group_desc[group].bg_inode_bitmap -
115 fs->group_desc[group-1].bg_inode_bitmap -
116 fs->super->s_blocks_per_group;
117 if (b_stride != i_stride ||
118 b_stride < 0)
119 goto next;
120
121 /* printf("group %d has stride %d\n", group, b_stride); */
122 sum += b_stride;
123 num++;
124
125 next:
126 prev_has_sb = has_sb;
127 }
128
129 if (fs->group_desc_count > 12 && num < 3)
130 sum = 0;
131
132 if (num)
133 fs->stride = sum / num;
134 else
135 fs->stride = 0;
136
137 fs->super->s_raid_stride = fs->stride;
138 ext2fs_mark_super_dirty(fs);
139
140 #if 0
141 if (fs->stride)
142 printf("Using RAID stride of %d\n", fs->stride);
143 #endif
144 }
145
main(int argc,char ** argv)146 int main (int argc, char ** argv)
147 {
148 errcode_t retval;
149 ext2_filsys fs;
150 int c;
151 int flags = 0;
152 int flush = 0;
153 int force = 0;
154 int io_flags = 0;
155 int fd, ret;
156 blk_t new_size = 0;
157 blk_t max_size = 0;
158 io_manager io_ptr;
159 char *new_size_str = 0;
160 int use_stride = -1;
161 #ifdef HAVE_FSTAT64
162 struct stat64 st_buf;
163 #else
164 struct stat st_buf;
165 #endif
166 __s64 new_file_size;
167 unsigned int sys_page_size = 4096;
168 long sysval;
169 int len, mount_flags;
170 char *mtpt;
171
172 #ifdef ENABLE_NLS
173 setlocale(LC_MESSAGES, "");
174 setlocale(LC_CTYPE, "");
175 bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
176 textdomain(NLS_CAT_NAME);
177 #endif
178
179 add_error_table(&et_ext2_error_table);
180
181 fprintf (stderr, "resize2fs %s (%s)\n",
182 E2FSPROGS_VERSION, E2FSPROGS_DATE);
183 if (argc && *argv)
184 program_name = *argv;
185
186 while ((c = getopt (argc, argv, "d:fFhpS:")) != EOF) {
187 switch (c) {
188 case 'h':
189 usage(program_name);
190 break;
191 case 'f':
192 force = 1;
193 break;
194 case 'F':
195 flush = 1;
196 break;
197 case 'd':
198 flags |= atoi(optarg);
199 break;
200 case 'p':
201 flags |= RESIZE_PERCENT_COMPLETE;
202 break;
203 case 'S':
204 use_stride = atoi(optarg);
205 break;
206 default:
207 usage(program_name);
208 }
209 }
210 if (optind == argc)
211 usage(program_name);
212
213 device_name = argv[optind++];
214 if (optind < argc)
215 new_size_str = argv[optind++];
216 if (optind < argc)
217 usage(program_name);
218
219 io_options = strchr(device_name, '?');
220 if (io_options)
221 *io_options++ = 0;
222
223 /*
224 * Figure out whether or not the device is mounted, and if it is
225 * where it is mounted.
226 */
227 len=80;
228 while (1) {
229 mtpt = malloc(len);
230 if (!mtpt)
231 return ENOMEM;
232 mtpt[len-1] = 0;
233 retval = ext2fs_check_mount_point(device_name, &mount_flags,
234 mtpt, len);
235 if (retval) {
236 com_err("ext2fs_check_mount_point", retval,
237 _("while determining whether %s is mounted."),
238 device_name);
239 exit(1);
240 }
241 if (!(mount_flags & EXT2_MF_MOUNTED) || (mtpt[len-1] == 0))
242 break;
243 free(mtpt);
244 len = 2 * len;
245 }
246
247 #ifdef HAVE_OPEN64
248 fd = open64(device_name, O_RDWR);
249 #else
250 fd = open(device_name, O_RDWR);
251 #endif
252 if (fd < 0) {
253 com_err("open", errno, _("while opening %s"),
254 device_name);
255 exit(1);
256 }
257
258 #ifdef HAVE_FSTAT64
259 ret = fstat64(fd, &st_buf);
260 #else
261 ret = fstat(fd, &st_buf);
262 #endif
263 if (ret < 0) {
264 com_err("open", errno,
265 _("while getting stat information for %s"),
266 device_name);
267 exit(1);
268 }
269
270 if (flush) {
271 retval = ext2fs_sync_device(fd, 1);
272 if (retval) {
273 com_err(argv[0], retval,
274 _("while trying to flush %s"),
275 device_name);
276 exit(1);
277 }
278 }
279
280 if (!S_ISREG(st_buf.st_mode )) {
281 close(fd);
282 fd = -1;
283 }
284
285 if (flags & RESIZE_DEBUG_IO) {
286 io_ptr = test_io_manager;
287 test_io_backing_manager = unix_io_manager;
288 } else
289 io_ptr = unix_io_manager;
290
291 if (!(mount_flags & EXT2_MF_MOUNTED))
292 io_flags = EXT2_FLAG_RW | EXT2_FLAG_EXCLUSIVE;
293 retval = ext2fs_open2(device_name, io_options, io_flags,
294 0, 0, io_ptr, &fs);
295 if (retval) {
296 com_err (program_name, retval, _("while trying to open %s"),
297 device_name);
298 printf (_("Couldn't find valid filesystem superblock.\n"));
299 exit (1);
300 }
301 /*
302 * Check for compatibility with the feature sets. We need to
303 * be more stringent than ext2fs_open().
304 */
305 if (fs->super->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) {
306 com_err(program_name, EXT2_ET_UNSUPP_FEATURE,
307 "(%s)", device_name);
308 exit(1);
309 }
310
311 /* Determine the system page size if possible */
312 #ifdef HAVE_SYSCONF
313 #if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
314 #define _SC_PAGESIZE _SC_PAGE_SIZE
315 #endif
316 #ifdef _SC_PAGESIZE
317 sysval = sysconf(_SC_PAGESIZE);
318 if (sysval > 0)
319 sys_page_size = sysval;
320 #endif /* _SC_PAGESIZE */
321 #endif /* HAVE_SYSCONF */
322
323 /*
324 * Get the size of the containing partition, and use this for
325 * defaults and for making sure the new filesystem doesn't
326 * exceed the partition size.
327 */
328 retval = ext2fs_get_device_size(device_name, fs->blocksize,
329 &max_size);
330 if (retval) {
331 com_err(program_name, retval,
332 _("while trying to determine filesystem size"));
333 exit(1);
334 }
335 if (new_size_str) {
336 new_size = parse_num_blocks(new_size_str,
337 fs->super->s_log_block_size);
338 if (!new_size) {
339 com_err(program_name, 0, _("bad filesystem size - %s"),
340 new_size_str);
341 exit(1);
342 }
343 } else {
344 new_size = max_size;
345 /* Round down to an even multiple of a pagesize */
346 if (sys_page_size > fs->blocksize)
347 new_size &= ~((sys_page_size / fs->blocksize)-1);
348 }
349
350 if (use_stride >= 0) {
351 if (use_stride >= (int) fs->super->s_blocks_per_group) {
352 com_err(program_name, 0,
353 _("Invalid stride length"));
354 exit(1);
355 }
356 fs->stride = fs->super->s_raid_stride = use_stride;
357 ext2fs_mark_super_dirty(fs);
358 } else
359 determine_fs_stride(fs);
360
361 /*
362 * If we are resizing a plain file, and it's not big enough,
363 * automatically extend it in a sparse fashion by writing the
364 * last requested block.
365 */
366 new_file_size = ((__u64) new_size) * fs->blocksize;
367 if ((__u64) new_file_size >
368 (((__u64) 1) << (sizeof(st_buf.st_size)*8 - 1)) - 1)
369 fd = -1;
370 if ((new_file_size > st_buf.st_size) &&
371 (fd > 0)) {
372 if ((ext2fs_llseek(fd, new_file_size-1, SEEK_SET) >= 0) &&
373 (write(fd, "0", 1) == 1))
374 max_size = new_size;
375 }
376 if (!force && (new_size > max_size)) {
377 fprintf(stderr, _("The containing partition (or device)"
378 " is only %u (%dk) blocks.\nYou requested a new size"
379 " of %u blocks.\n\n"), max_size,
380 fs->blocksize / 1024, new_size);
381 exit(1);
382 }
383 if (new_size == fs->super->s_blocks_count) {
384 fprintf(stderr, _("The filesystem is already %u blocks "
385 "long. Nothing to do!\n\n"), new_size);
386 exit(0);
387 }
388 if (mount_flags & EXT2_MF_MOUNTED) {
389 retval = online_resize_fs(fs, mtpt, &new_size, flags);
390 } else {
391 if (!force && ((fs->super->s_lastcheck < fs->super->s_mtime) ||
392 (fs->super->s_state & EXT2_ERROR_FS) ||
393 ((fs->super->s_state & EXT2_VALID_FS) == 0))) {
394 fprintf(stderr,
395 _("Please run 'e2fsck -f %s' first.\n\n"),
396 device_name);
397 exit(1);
398 }
399 printf("Resizing the filesystem on %s to %u (%dk) blocks.\n",
400 device_name, new_size, fs->blocksize / 1024);
401 retval = resize_fs(fs, &new_size, flags,
402 ((flags & RESIZE_PERCENT_COMPLETE) ?
403 resize_progress_func : 0));
404 }
405 if (retval) {
406 com_err(program_name, retval, _("while trying to resize %s"),
407 device_name);
408 ext2fs_close (fs);
409 exit(1);
410 }
411 printf(_("The filesystem on %s is now %u blocks long.\n\n"),
412 device_name, new_size);
413
414 if ((st_buf.st_size > new_file_size) &&
415 (fd > 0)) {
416 #ifdef HAVE_FTRUNCATE64
417 ftruncate64(fd, new_file_size);
418 #else
419 /* Only truncate if new_file_size doesn't overflow off_t */
420 if (((off_t) new_file_size) == new_file_size)
421 ftruncate(fd, (off_t) new_file_size);
422 #endif
423 }
424 if (fd > 0)
425 close(fd);
426 remove_error_table(&et_ext2_error_table);
427 return (0);
428 }
429