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Commit | Line | Data |
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24b2c7a7 TT |
1 | /* |
2 | * resize2fs.c --- ext2 main routine | |
3 | * | |
0cee8a5c TT |
4 | * Copyright (C) 1997, 1998 by Theodore Ts'o and |
5 | * PowerQuest, Inc. | |
6 | * | |
7 | * Copyright (C) 1999, 2000 by Theosore Ts'o | |
efc6f628 | 8 | * |
24b2c7a7 | 9 | * %Begin-Header% |
0cee8a5c TT |
10 | * This file may be redistributed under the terms of the GNU Public |
11 | * License. | |
24b2c7a7 TT |
12 | * %End-Header% |
13 | */ | |
14 | ||
05e112a1 TT |
15 | /* |
16 | * Resizing a filesystem consists of the following phases: | |
17 | * | |
a8519a2d | 18 | * 1. Adjust superblock and write out new parts of the inode |
05e112a1 | 19 | * table |
a8519a2d TT |
20 | * 2. Determine blocks which need to be relocated, and copy the |
21 | * contents of blocks from their old locations to the new ones. | |
22 | * 3. Scan the inode table, doing the following: | |
23 | * a. If blocks have been moved, update the block | |
24 | * pointers in the inodes and indirect blocks to | |
25 | * point at the new block locations. | |
26 | * b. If parts of the inode table need to be evacuated, | |
27 | * copy inodes from their old locations to their | |
28 | * new ones. | |
29 | * c. If (b) needs to be done, note which blocks contain | |
30 | * directory information, since we will need to | |
31 | * update the directory information. | |
32 | * 4. Update the directory blocks with the new inode locations. | |
33 | * 5. Move the inode tables, if necessary. | |
05e112a1 | 34 | */ |
a8519a2d | 35 | |
d1154eb4 | 36 | #include "config.h" |
24b2c7a7 | 37 | #include "resize2fs.h" |
b969b1b8 | 38 | #include <time.h> |
24b2c7a7 | 39 | |
546a1ff1 | 40 | #ifdef __linux__ /* Kludge for debugging */ |
a8519a2d TT |
41 | #define RESIZE2FS_DEBUG |
42 | #endif | |
43 | ||
86acdebd | 44 | static void fix_uninit_block_bitmaps(ext2_filsys fs); |
8728d506 | 45 | static errcode_t adjust_superblock(ext2_resize_t rfs, blk64_t new_size); |
a8519a2d TT |
46 | static errcode_t blocks_to_move(ext2_resize_t rfs); |
47 | static errcode_t block_mover(ext2_resize_t rfs); | |
48 | static errcode_t inode_scan_and_fix(ext2_resize_t rfs); | |
49 | static errcode_t inode_ref_fix(ext2_resize_t rfs); | |
50 | static errcode_t move_itables(ext2_resize_t rfs); | |
9213a93b | 51 | static errcode_t fix_resize_inode(ext2_filsys fs); |
a8519a2d | 52 | static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs); |
8a6ede8b | 53 | static errcode_t fix_sb_journal_backup(ext2_filsys fs); |
f026f1a3 TT |
54 | static errcode_t mark_table_blocks(ext2_filsys fs, |
55 | ext2fs_block_bitmap bmap); | |
a8519a2d TT |
56 | |
57 | /* | |
58 | * Some helper CPP macros | |
59 | */ | |
d7cca6b0 VAH |
60 | #define IS_BLOCK_BM(fs, i, blk) ((blk) == ext2fs_block_bitmap_loc((fs),(i))) |
61 | #define IS_INODE_BM(fs, i, blk) ((blk) == ext2fs_inode_bitmap_loc((fs),(i))) | |
a8519a2d | 62 | |
d7cca6b0 VAH |
63 | #define IS_INODE_TB(fs, i, blk) (((blk) >= ext2fs_inode_table_loc((fs), (i))) && \ |
64 | ((blk) < (ext2fs_inode_table_loc((fs), (i)) + \ | |
a8519a2d TT |
65 | (fs)->inode_blocks_per_group))) |
66 | ||
1773c87c TT |
67 | /* Some bigalloc helper macros which are more succint... */ |
68 | #define B2C(x) EXT2FS_B2C(fs, (x)) | |
69 | #define C2B(x) EXT2FS_C2B(fs, (x)) | |
70 | #define EQ_CLSTR(x, y) (B2C(x) == B2C(y)) | |
71 | #define LE_CLSTR(x, y) (B2C(x) <= B2C(y)) | |
72 | #define LT_CLSTR(x, y) (B2C(x) < B2C(y)) | |
73 | #define GE_CLSTR(x, y) (B2C(x) >= B2C(y)) | |
74 | #define GT_CLSTR(x, y) (B2C(x) > B2C(y)) | |
75 | ||
2d8c0c8a TT |
76 | int lazy_itable_init; |
77 | ||
a8519a2d TT |
78 | /* |
79 | * This is the top-level routine which does the dirty deed.... | |
80 | */ | |
8728d506 | 81 | errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, int flags, |
3346084b | 82 | errcode_t (*progress)(ext2_resize_t rfs, int pass, |
86acdebd TT |
83 | unsigned long cur, |
84 | unsigned long max_val)) | |
a8519a2d TT |
85 | { |
86 | ext2_resize_t rfs; | |
87 | errcode_t retval; | |
1eb31c48 | 88 | struct resource_track rtrack, overall_track; |
96cdb37e | 89 | |
a8519a2d TT |
90 | /* |
91 | * Create the data structure | |
92 | */ | |
c4e3d3f3 | 93 | retval = ext2fs_get_mem(sizeof(struct ext2_resize_struct), &rfs); |
a8519a2d TT |
94 | if (retval) |
95 | return retval; | |
a8519a2d | 96 | |
1eb31c48 | 97 | memset(rfs, 0, sizeof(struct ext2_resize_struct)); |
7f9c96ee | 98 | fs->priv_data = rfs; |
a8519a2d TT |
99 | rfs->old_fs = fs; |
100 | rfs->flags = flags; | |
101 | rfs->itable_buf = 0; | |
102 | rfs->progress = progress; | |
1eb31c48 TT |
103 | |
104 | init_resource_track(&overall_track, "overall resize2fs", fs->io); | |
105 | init_resource_track(&rtrack, "read_bitmaps", fs->io); | |
106 | retval = ext2fs_read_bitmaps(fs); | |
107 | if (retval) | |
108 | goto errout; | |
109 | print_resource_track(rfs, &rtrack, fs->io); | |
110 | ||
111 | fs->super->s_state |= EXT2_ERROR_FS; | |
112 | ext2fs_mark_super_dirty(fs); | |
113 | ext2fs_flush(fs); | |
114 | ||
115 | init_resource_track(&rtrack, "fix_uninit_block_bitmaps 1", fs->io); | |
116 | fix_uninit_block_bitmaps(fs); | |
117 | print_resource_track(rfs, &rtrack, fs->io); | |
a8519a2d TT |
118 | retval = ext2fs_dup_handle(fs, &rfs->new_fs); |
119 | if (retval) | |
120 | goto errout; | |
121 | ||
1eb31c48 | 122 | init_resource_track(&rtrack, "adjust_superblock", fs->io); |
116db1b5 | 123 | retval = adjust_superblock(rfs, *new_size); |
a8519a2d TT |
124 | if (retval) |
125 | goto errout; | |
1eb31c48 | 126 | print_resource_track(rfs, &rtrack, fs->io); |
a8519a2d | 127 | |
1eb31c48 TT |
128 | |
129 | init_resource_track(&rtrack, "fix_uninit_block_bitmaps 2", fs->io); | |
86acdebd | 130 | fix_uninit_block_bitmaps(rfs->new_fs); |
1eb31c48 | 131 | print_resource_track(rfs, &rtrack, fs->io); |
86acdebd | 132 | /* Clear the block bitmap uninit flag for the last block group */ |
e633b58a | 133 | ext2fs_bg_flags_clear(rfs->new_fs, rfs->new_fs->group_desc_count - 1, |
732c8cd5 | 134 | EXT2_BG_BLOCK_UNINIT); |
86acdebd | 135 | |
4efbac6f | 136 | *new_size = ext2fs_blocks_count(rfs->new_fs->super); |
116db1b5 | 137 | |
1eb31c48 | 138 | init_resource_track(&rtrack, "blocks_to_move", fs->io); |
a8519a2d TT |
139 | retval = blocks_to_move(rfs); |
140 | if (retval) | |
141 | goto errout; | |
1eb31c48 | 142 | print_resource_track(rfs, &rtrack, fs->io); |
a8519a2d TT |
143 | |
144 | #ifdef RESIZE2FS_DEBUG | |
145 | if (rfs->flags & RESIZE_DEBUG_BMOVE) | |
8728d506 | 146 | printf("Number of free blocks: %llu/%llu, Needed: %llu\n", |
4efbac6f VAH |
147 | ext2fs_free_blocks_count(rfs->old_fs->super), |
148 | ext2fs_free_blocks_count(rfs->new_fs->super), | |
a8519a2d TT |
149 | rfs->needed_blocks); |
150 | #endif | |
efc6f628 | 151 | |
1eb31c48 | 152 | init_resource_track(&rtrack, "block_mover", fs->io); |
a8519a2d TT |
153 | retval = block_mover(rfs); |
154 | if (retval) | |
155 | goto errout; | |
1eb31c48 | 156 | print_resource_track(rfs, &rtrack, fs->io); |
a8519a2d | 157 | |
1eb31c48 | 158 | init_resource_track(&rtrack, "inode_scan_and_fix", fs->io); |
a8519a2d TT |
159 | retval = inode_scan_and_fix(rfs); |
160 | if (retval) | |
161 | goto errout; | |
1eb31c48 | 162 | print_resource_track(rfs, &rtrack, fs->io); |
a8519a2d | 163 | |
1eb31c48 | 164 | init_resource_track(&rtrack, "inode_ref_fix", fs->io); |
a8519a2d TT |
165 | retval = inode_ref_fix(rfs); |
166 | if (retval) | |
167 | goto errout; | |
1eb31c48 | 168 | print_resource_track(rfs, &rtrack, fs->io); |
a8519a2d | 169 | |
1eb31c48 | 170 | init_resource_track(&rtrack, "move_itables", fs->io); |
a8519a2d TT |
171 | retval = move_itables(rfs); |
172 | if (retval) | |
173 | goto errout; | |
1eb31c48 | 174 | print_resource_track(rfs, &rtrack, fs->io); |
a8519a2d | 175 | |
1eb31c48 | 176 | init_resource_track(&rtrack, "calculate_summary_stats", fs->io); |
64ad98ac TT |
177 | retval = ext2fs_calculate_summary_stats(rfs->new_fs); |
178 | if (retval) | |
179 | goto errout; | |
1eb31c48 | 180 | print_resource_track(rfs, &rtrack, fs->io); |
efc6f628 | 181 | |
1eb31c48 | 182 | init_resource_track(&rtrack, "fix_resize_inode", fs->io); |
9213a93b TT |
183 | retval = fix_resize_inode(rfs->new_fs); |
184 | if (retval) | |
185 | goto errout; | |
1eb31c48 | 186 | print_resource_track(rfs, &rtrack, fs->io); |
9213a93b | 187 | |
1eb31c48 | 188 | init_resource_track(&rtrack, "fix_sb_journal_backup", fs->io); |
8a6ede8b ES |
189 | retval = fix_sb_journal_backup(rfs->new_fs); |
190 | if (retval) | |
191 | goto errout; | |
1eb31c48 | 192 | print_resource_track(rfs, &rtrack, fs->io); |
8a6ede8b | 193 | |
96cdb37e | 194 | rfs->new_fs->super->s_state &= ~EXT2_ERROR_FS; |
efc6f628 | 195 | rfs->new_fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; |
1eb31c48 TT |
196 | |
197 | print_resource_track(rfs, &overall_track, fs->io); | |
a8519a2d TT |
198 | retval = ext2fs_close(rfs->new_fs); |
199 | if (retval) | |
200 | goto errout; | |
201 | ||
202 | rfs->flags = flags; | |
efc6f628 | 203 | |
a8519a2d TT |
204 | ext2fs_free(rfs->old_fs); |
205 | if (rfs->itable_buf) | |
c4e3d3f3 | 206 | ext2fs_free_mem(&rfs->itable_buf); |
e2ca097f TT |
207 | if (rfs->reserve_blocks) |
208 | ext2fs_free_block_bitmap(rfs->reserve_blocks); | |
209 | if (rfs->move_blocks) | |
210 | ext2fs_free_block_bitmap(rfs->move_blocks); | |
c4e3d3f3 | 211 | ext2fs_free_mem(&rfs); |
efc6f628 | 212 | |
a8519a2d TT |
213 | return 0; |
214 | ||
215 | errout: | |
216 | if (rfs->new_fs) | |
217 | ext2fs_free(rfs->new_fs); | |
218 | if (rfs->itable_buf) | |
c4e3d3f3 TT |
219 | ext2fs_free_mem(&rfs->itable_buf); |
220 | ext2fs_free_mem(&rfs); | |
a8519a2d TT |
221 | return retval; |
222 | } | |
223 | ||
86acdebd TT |
224 | /* |
225 | * Clean up the bitmaps for unitialized bitmaps | |
226 | */ | |
227 | static void fix_uninit_block_bitmaps(ext2_filsys fs) | |
228 | { | |
a0ba54ec | 229 | blk64_t blk, lblk; |
86acdebd | 230 | dgrp_t g; |
a0ba54ec | 231 | int i; |
86acdebd TT |
232 | |
233 | if (!(EXT2_HAS_RO_COMPAT_FEATURE(fs->super, | |
234 | EXT4_FEATURE_RO_COMPAT_GDT_CSUM))) | |
235 | return; | |
236 | ||
237 | for (g=0; g < fs->group_desc_count; g++) { | |
cd65a24e | 238 | if (!(ext2fs_bg_flags_test(fs, g, EXT2_BG_BLOCK_UNINIT))) |
86acdebd TT |
239 | continue; |
240 | ||
5d3a88fb | 241 | blk = ext2fs_group_first_block2(fs, g); |
a0ba54ec TT |
242 | lblk = ext2fs_group_last_block2(fs, g); |
243 | ext2fs_unmark_block_bitmap_range2(fs->block_map, blk, | |
244 | lblk - blk + 1); | |
245 | ||
246 | ext2fs_reserve_super_and_bgd(fs, g, fs->block_map); | |
247 | ext2fs_mark_block_bitmap2(fs->block_map, | |
248 | ext2fs_block_bitmap_loc(fs, g)); | |
249 | ext2fs_mark_block_bitmap2(fs->block_map, | |
250 | ext2fs_inode_bitmap_loc(fs, g)); | |
251 | for (i = 0, blk = ext2fs_inode_table_loc(fs, g); | |
252 | i < (unsigned int) fs->inode_blocks_per_group; | |
253 | i++, blk++) | |
254 | ext2fs_mark_block_bitmap2(fs->block_map, blk); | |
86acdebd TT |
255 | } |
256 | } | |
257 | ||
a8519a2d TT |
258 | /* -------------------------------------------------------------------- |
259 | * | |
260 | * Resize processing, phase 1. | |
261 | * | |
262 | * In this phase we adjust the in-memory superblock information, and | |
263 | * initialize any new parts of the inode table. The new parts of the | |
264 | * inode table are created in virgin disk space, so we can abort here | |
265 | * without any side effects. | |
266 | * -------------------------------------------------------------------- | |
267 | */ | |
268 | ||
9227c5bb TT |
269 | /* |
270 | * If the group descriptor's bitmap and inode table blocks are valid, | |
c09043f1 TT |
271 | * release them in the new filesystem data structure, and mark them as |
272 | * reserved so the old inode table blocks don't get overwritten. | |
9227c5bb | 273 | */ |
c09043f1 TT |
274 | static void free_gdp_blocks(ext2_filsys fs, |
275 | ext2fs_block_bitmap reserve_blocks, | |
276 | struct ext2_group_desc *gdp) | |
9227c5bb TT |
277 | { |
278 | blk_t blk; | |
279 | int j; | |
280 | ||
281 | if (gdp->bg_block_bitmap && | |
4efbac6f | 282 | (gdp->bg_block_bitmap < ext2fs_blocks_count(fs->super))) { |
9227c5bb | 283 | ext2fs_block_alloc_stats(fs, gdp->bg_block_bitmap, -1); |
3346084b | 284 | ext2fs_mark_block_bitmap2(reserve_blocks, |
c09043f1 TT |
285 | gdp->bg_block_bitmap); |
286 | } | |
9227c5bb TT |
287 | |
288 | if (gdp->bg_inode_bitmap && | |
4efbac6f | 289 | (gdp->bg_inode_bitmap < ext2fs_blocks_count(fs->super))) { |
9227c5bb | 290 | ext2fs_block_alloc_stats(fs, gdp->bg_inode_bitmap, -1); |
3346084b | 291 | ext2fs_mark_block_bitmap2(reserve_blocks, |
c09043f1 TT |
292 | gdp->bg_inode_bitmap); |
293 | } | |
9227c5bb TT |
294 | |
295 | if (gdp->bg_inode_table == 0 || | |
4efbac6f | 296 | (gdp->bg_inode_table >= ext2fs_blocks_count(fs->super))) |
9227c5bb TT |
297 | return; |
298 | ||
299 | for (blk = gdp->bg_inode_table, j = 0; | |
300 | j < fs->inode_blocks_per_group; j++, blk++) { | |
4efbac6f | 301 | if (blk >= ext2fs_blocks_count(fs->super)) |
9227c5bb TT |
302 | break; |
303 | ext2fs_block_alloc_stats(fs, blk, -1); | |
3346084b | 304 | ext2fs_mark_block_bitmap2(reserve_blocks, blk); |
9227c5bb TT |
305 | } |
306 | } | |
307 | ||
24b2c7a7 | 308 | /* |
bf69235a TT |
309 | * This routine is shared by the online and offline resize routines. |
310 | * All of the information which is adjusted in memory is done here. | |
24b2c7a7 | 311 | */ |
c09043f1 | 312 | errcode_t adjust_fs_info(ext2_filsys fs, ext2_filsys old_fs, |
8728d506 | 313 | ext2fs_block_bitmap reserve_blocks, blk64_t new_size) |
24b2c7a7 | 314 | { |
24b2c7a7 | 315 | errcode_t retval; |
8728d506 VAH |
316 | blk64_t overhead = 0; |
317 | blk64_t rem; | |
318 | blk64_t blk, group_block; | |
2696f250 | 319 | blk64_t real_end; |
5e27a274 TT |
320 | blk64_t old_numblocks, numblocks, adjblocks; |
321 | unsigned long i, j, old_desc_blocks; | |
54434927 | 322 | unsigned int meta_bg, meta_bg_size; |
74128f8d | 323 | int has_super, csum_flag; |
de8f3a76 | 324 | unsigned long long new_inodes; /* u64 to check for overflow */ |
9ff8ece5 | 325 | double percent; |
bf69235a | 326 | |
4efbac6f | 327 | ext2fs_blocks_count_set(fs->super, new_size); |
24b2c7a7 TT |
328 | |
329 | retry: | |
4efbac6f | 330 | fs->group_desc_count = ext2fs_div64_ceil(ext2fs_blocks_count(fs->super) - |
69022e02 TT |
331 | fs->super->s_first_data_block, |
332 | EXT2_BLOCKS_PER_GROUP(fs->super)); | |
24b2c7a7 TT |
333 | if (fs->group_desc_count == 0) |
334 | return EXT2_ET_TOOSMALL; | |
efc6f628 | 335 | fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count, |
69022e02 | 336 | EXT2_DESC_PER_BLOCK(fs->super)); |
24b2c7a7 TT |
337 | |
338 | /* | |
339 | * Overhead is the number of bookkeeping blocks per group. It | |
340 | * includes the superblock backup, the group descriptor | |
341 | * backups, the inode bitmap, the block bitmap, and the inode | |
342 | * table. | |
24b2c7a7 | 343 | */ |
9213a93b TT |
344 | overhead = (int) (2 + fs->inode_blocks_per_group); |
345 | ||
346 | if (ext2fs_bg_has_super(fs, fs->group_desc_count - 1)) | |
efc6f628 | 347 | overhead += 1 + fs->desc_blocks + |
9213a93b TT |
348 | fs->super->s_reserved_gdt_blocks; |
349 | ||
24b2c7a7 TT |
350 | /* |
351 | * See if the last group is big enough to support the | |
352 | * necessary data structures. If not, we need to get rid of | |
353 | * it. | |
354 | */ | |
4efbac6f | 355 | rem = (ext2fs_blocks_count(fs->super) - fs->super->s_first_data_block) % |
24b2c7a7 TT |
356 | fs->super->s_blocks_per_group; |
357 | if ((fs->group_desc_count == 1) && rem && (rem < overhead)) | |
358 | return EXT2_ET_TOOSMALL; | |
515e555a | 359 | if ((fs->group_desc_count > 1) && rem && (rem < overhead+50)) { |
4efbac6f VAH |
360 | ext2fs_blocks_count_set(fs->super, |
361 | ext2fs_blocks_count(fs->super) - rem); | |
24b2c7a7 TT |
362 | goto retry; |
363 | } | |
364 | /* | |
365 | * Adjust the number of inodes | |
366 | */ | |
de8f3a76 | 367 | new_inodes =(unsigned long long) fs->super->s_inodes_per_group * fs->group_desc_count; |
f3358643 ES |
368 | if (new_inodes > ~0U) { |
369 | fprintf(stderr, _("inodes (%llu) must be less than %u"), | |
370 | new_inodes, ~0U); | |
371 | return EXT2_ET_TOO_MANY_INODES; | |
372 | } | |
24b2c7a7 TT |
373 | fs->super->s_inodes_count = fs->super->s_inodes_per_group * |
374 | fs->group_desc_count; | |
375 | ||
376 | /* | |
377 | * Adjust the number of free blocks | |
378 | */ | |
4efbac6f VAH |
379 | blk = ext2fs_blocks_count(old_fs->super); |
380 | if (blk > ext2fs_blocks_count(fs->super)) | |
381 | ext2fs_free_blocks_count_set(fs->super, | |
382 | ext2fs_free_blocks_count(fs->super) - | |
383 | (blk - ext2fs_blocks_count(fs->super))); | |
24b2c7a7 | 384 | else |
4efbac6f VAH |
385 | ext2fs_free_blocks_count_set(fs->super, |
386 | ext2fs_free_blocks_count(fs->super) + | |
387 | (ext2fs_blocks_count(fs->super) - blk)); | |
24b2c7a7 | 388 | |
c762c8e6 TT |
389 | /* |
390 | * Adjust the number of reserved blocks | |
391 | */ | |
4efbac6f VAH |
392 | percent = (ext2fs_r_blocks_count(old_fs->super) * 100.0) / |
393 | ext2fs_blocks_count(old_fs->super); | |
394 | ext2fs_r_blocks_count_set(fs->super, | |
395 | (percent * ext2fs_blocks_count(fs->super) / | |
396 | 100.0)); | |
c762c8e6 | 397 | |
24b2c7a7 TT |
398 | /* |
399 | * Adjust the bitmaps for size | |
400 | */ | |
3346084b | 401 | retval = ext2fs_resize_inode_bitmap2(fs->super->s_inodes_count, |
24b2c7a7 TT |
402 | fs->super->s_inodes_count, |
403 | fs->inode_map); | |
c762c8e6 | 404 | if (retval) goto errout; |
efc6f628 | 405 | |
2696f250 TT |
406 | real_end = (((blk64_t) EXT2_BLOCKS_PER_GROUP(fs->super) * |
407 | fs->group_desc_count)) - 1 + | |
408 | fs->super->s_first_data_block; | |
f026f1a3 TT |
409 | retval = ext2fs_resize_block_bitmap2(new_size - 1, |
410 | real_end, fs->block_map); | |
c762c8e6 | 411 | if (retval) goto errout; |
24b2c7a7 | 412 | |
f026f1a3 TT |
413 | /* |
414 | * If we are growing the file system, also grow the size of | |
415 | * the reserve_blocks bitmap | |
416 | */ | |
417 | if (reserve_blocks && new_size > ext2fs_blocks_count(old_fs->super)) { | |
418 | retval = ext2fs_resize_block_bitmap2(new_size - 1, | |
419 | real_end, reserve_blocks); | |
420 | if (retval) goto errout; | |
421 | } | |
422 | ||
24b2c7a7 TT |
423 | /* |
424 | * Reallocate the group descriptors as necessary. | |
425 | */ | |
bf69235a TT |
426 | if (old_fs->desc_blocks != fs->desc_blocks) { |
427 | retval = ext2fs_resize_mem(old_fs->desc_blocks * | |
76f875da TT |
428 | fs->blocksize, |
429 | fs->desc_blocks * fs->blocksize, | |
c4e3d3f3 | 430 | &fs->group_desc); |
ca8abba7 | 431 | if (retval) |
a8519a2d | 432 | goto errout; |
efc6f628 TT |
433 | if (fs->desc_blocks > old_fs->desc_blocks) |
434 | memset((char *) fs->group_desc + | |
bf69235a TT |
435 | (old_fs->desc_blocks * fs->blocksize), 0, |
436 | (fs->desc_blocks - old_fs->desc_blocks) * | |
2787276e | 437 | fs->blocksize); |
24b2c7a7 | 438 | } |
1e1da29f | 439 | |
9213a93b TT |
440 | /* |
441 | * If the resize_inode feature is set, and we are changing the | |
442 | * number of descriptor blocks, then adjust | |
443 | * s_reserved_gdt_blocks if possible to avoid needing to move | |
444 | * the inode table either now or in the future. | |
445 | */ | |
efc6f628 | 446 | if ((fs->super->s_feature_compat & |
9213a93b | 447 | EXT2_FEATURE_COMPAT_RESIZE_INODE) && |
bf69235a | 448 | (old_fs->desc_blocks != fs->desc_blocks)) { |
9213a93b TT |
449 | int new; |
450 | ||
efc6f628 | 451 | new = ((int) fs->super->s_reserved_gdt_blocks) + |
bf69235a | 452 | (old_fs->desc_blocks - fs->desc_blocks); |
9213a93b TT |
453 | if (new < 0) |
454 | new = 0; | |
de8f3a76 | 455 | if (new > (int) fs->blocksize/4) |
9213a93b TT |
456 | new = fs->blocksize/4; |
457 | fs->super->s_reserved_gdt_blocks = new; | |
9213a93b TT |
458 | } |
459 | ||
a8519a2d | 460 | /* |
c09043f1 TT |
461 | * If we are shrinking the number of block groups, we're done |
462 | * and can exit now. | |
1e1da29f | 463 | */ |
bf69235a | 464 | if (old_fs->group_desc_count > fs->group_desc_count) { |
9227c5bb TT |
465 | /* |
466 | * Check the block groups that we are chopping off | |
467 | * and free any blocks associated with their metadata | |
468 | */ | |
469 | for (i = fs->group_desc_count; | |
470 | i < old_fs->group_desc_count; i++) { | |
c09043f1 | 471 | free_gdp_blocks(fs, reserve_blocks, |
d7cca6b0 VAH |
472 | ext2fs_group_desc(old_fs, |
473 | old_fs->group_desc, i)); | |
9227c5bb | 474 | } |
c762c8e6 TT |
475 | retval = 0; |
476 | goto errout; | |
477 | } | |
bf69235a | 478 | |
a8519a2d TT |
479 | /* |
480 | * Fix the count of the last (old) block group | |
481 | */ | |
4efbac6f | 482 | old_numblocks = (ext2fs_blocks_count(old_fs->super) - |
bf69235a TT |
483 | old_fs->super->s_first_data_block) % |
484 | old_fs->super->s_blocks_per_group; | |
1e1da29f | 485 | if (!old_numblocks) |
bf69235a TT |
486 | old_numblocks = old_fs->super->s_blocks_per_group; |
487 | if (old_fs->group_desc_count == fs->group_desc_count) { | |
4efbac6f | 488 | numblocks = (ext2fs_blocks_count(fs->super) - |
bf69235a TT |
489 | fs->super->s_first_data_block) % |
490 | fs->super->s_blocks_per_group; | |
1e1da29f | 491 | if (!numblocks) |
bf69235a | 492 | numblocks = fs->super->s_blocks_per_group; |
1e1da29f | 493 | } else |
bf69235a TT |
494 | numblocks = fs->super->s_blocks_per_group; |
495 | i = old_fs->group_desc_count - 1; | |
d7cca6b0 | 496 | ext2fs_bg_free_blocks_count_set(fs, i, ext2fs_bg_free_blocks_count(fs, i) + (numblocks - old_numblocks)); |
236efede JS |
497 | ext2fs_group_desc_csum_set(fs, i); |
498 | ||
1e1da29f | 499 | /* |
a8519a2d TT |
500 | * If the number of block groups is staying the same, we're |
501 | * done and can exit now. (If the number block groups is | |
502 | * shrinking, we had exited earlier.) | |
1e1da29f | 503 | */ |
bf69235a | 504 | if (old_fs->group_desc_count >= fs->group_desc_count) { |
c762c8e6 TT |
505 | retval = 0; |
506 | goto errout; | |
507 | } | |
bf69235a | 508 | |
a8519a2d TT |
509 | /* |
510 | * Initialize the new block group descriptors | |
511 | */ | |
027b0577 TT |
512 | group_block = ext2fs_group_first_block2(fs, |
513 | old_fs->group_desc_count); | |
74128f8d TT |
514 | csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super, |
515 | EXT4_FEATURE_RO_COMPAT_GDT_CSUM); | |
2d8c0c8a TT |
516 | if (access("/sys/fs/ext4/features/lazy_itable_init", F_OK) == 0) |
517 | lazy_itable_init = 1; | |
76dd5e5c TT |
518 | if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) |
519 | old_desc_blocks = fs->super->s_first_meta_bg; | |
520 | else | |
efc6f628 | 521 | old_desc_blocks = fs->desc_blocks + |
9213a93b | 522 | fs->super->s_reserved_gdt_blocks; |
f026f1a3 TT |
523 | |
524 | /* | |
525 | * If we changed the number of block_group descriptor blocks, | |
526 | * we need to make sure they are all marked as reserved in the | |
527 | * file systems's block allocation map. | |
528 | */ | |
529 | for (i = 0; i < old_fs->group_desc_count; i++) | |
530 | ext2fs_reserve_super_and_bgd(fs, i, fs->block_map); | |
531 | ||
bf69235a | 532 | for (i = old_fs->group_desc_count; |
1e1da29f | 533 | i < fs->group_desc_count; i++) { |
d7cca6b0 | 534 | memset(ext2fs_group_desc(fs, fs->group_desc, i), 0, |
1e1da29f TT |
535 | sizeof(struct ext2_group_desc)); |
536 | adjblocks = 0; | |
537 | ||
e633b58a | 538 | ext2fs_bg_flags_zap(fs, i); |
2d8c0c8a TT |
539 | if (csum_flag) { |
540 | ext2fs_bg_flags_set(fs, i, EXT2_BG_INODE_UNINIT); | |
541 | if (!lazy_itable_init) | |
542 | ext2fs_bg_flags_set(fs, i, | |
543 | EXT2_BG_INODE_ZEROED); | |
544 | ext2fs_bg_itable_unused_set(fs, i, | |
545 | fs->super->s_inodes_per_group); | |
546 | } | |
98f45471 ES |
547 | |
548 | numblocks = ext2fs_group_blocks_count(fs, i); | |
549 | if ((i < fs->group_desc_count - 1) && csum_flag) | |
550 | ext2fs_bg_flags_set(fs, i, EXT2_BG_BLOCK_UNINIT); | |
1e1da29f | 551 | |
76dd5e5c TT |
552 | has_super = ext2fs_bg_has_super(fs, i); |
553 | if (has_super) { | |
48f23054 | 554 | ext2fs_block_alloc_stats2(fs, group_block, +1); |
76dd5e5c TT |
555 | adjblocks++; |
556 | } | |
f2de1d38 | 557 | meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super); |
76dd5e5c TT |
558 | meta_bg = i / meta_bg_size; |
559 | if (!(fs->super->s_feature_incompat & | |
560 | EXT2_FEATURE_INCOMPAT_META_BG) || | |
561 | (meta_bg < fs->super->s_first_meta_bg)) { | |
562 | if (has_super) { | |
563 | for (j=0; j < old_desc_blocks; j++) | |
48f23054 | 564 | ext2fs_block_alloc_stats2(fs, |
74128f8d | 565 | group_block + 1 + j, +1); |
76dd5e5c TT |
566 | adjblocks += old_desc_blocks; |
567 | } | |
568 | } else { | |
569 | if (has_super) | |
570 | has_super = 1; | |
571 | if (((i % meta_bg_size) == 0) || | |
572 | ((i % meta_bg_size) == 1) || | |
573 | ((i % meta_bg_size) == (meta_bg_size-1))) | |
48f23054 | 574 | ext2fs_block_alloc_stats2(fs, |
74128f8d | 575 | group_block + has_super, +1); |
24b2c7a7 | 576 | } |
efc6f628 | 577 | |
1e1da29f | 578 | adjblocks += 2 + fs->inode_blocks_per_group; |
efc6f628 | 579 | |
1e1da29f | 580 | numblocks -= adjblocks; |
4efbac6f VAH |
581 | ext2fs_free_blocks_count_set(fs->super, |
582 | ext2fs_free_blocks_count(fs->super) - adjblocks); | |
1e1da29f TT |
583 | fs->super->s_free_inodes_count += |
584 | fs->super->s_inodes_per_group; | |
d7cca6b0 VAH |
585 | ext2fs_bg_free_blocks_count_set(fs, i, numblocks); |
586 | ext2fs_bg_free_inodes_count_set(fs, i, | |
587 | fs->super->s_inodes_per_group); | |
588 | ext2fs_bg_used_dirs_count_set(fs, i, 0); | |
236efede | 589 | ext2fs_group_desc_csum_set(fs, i); |
24b2c7a7 | 590 | |
1e1da29f | 591 | retval = ext2fs_allocate_group_table(fs, i, 0); |
c762c8e6 | 592 | if (retval) goto errout; |
24b2c7a7 | 593 | |
bf69235a TT |
594 | group_block += fs->super->s_blocks_per_group; |
595 | } | |
596 | retval = 0; | |
597 | ||
f026f1a3 TT |
598 | /* |
599 | * Mark all of the metadata blocks as reserved so they won't | |
600 | * get allocated by the call to ext2fs_allocate_group_table() | |
601 | * in blocks_to_move(), where we allocate new blocks to | |
602 | * replace those allocation bitmap and inode table blocks | |
603 | * which have to get relocated to make space for an increased | |
604 | * number of the block group descriptors. | |
605 | */ | |
606 | if (reserve_blocks) | |
607 | mark_table_blocks(fs, reserve_blocks); | |
608 | ||
bf69235a TT |
609 | errout: |
610 | return (retval); | |
611 | } | |
612 | ||
613 | /* | |
614 | * This routine adjusts the superblock and other data structures, both | |
615 | * in disk as well as in memory... | |
616 | */ | |
8728d506 | 617 | static errcode_t adjust_superblock(ext2_resize_t rfs, blk64_t new_size) |
bf69235a TT |
618 | { |
619 | ext2_filsys fs; | |
620 | int adj = 0; | |
621 | errcode_t retval; | |
8728d506 | 622 | blk64_t group_block; |
bf69235a TT |
623 | unsigned long i; |
624 | unsigned long max_group; | |
efc6f628 | 625 | |
bf69235a TT |
626 | fs = rfs->new_fs; |
627 | ext2fs_mark_super_dirty(fs); | |
628 | ext2fs_mark_bb_dirty(fs); | |
629 | ext2fs_mark_ib_dirty(fs); | |
630 | ||
c09043f1 TT |
631 | retval = ext2fs_allocate_block_bitmap(fs, _("reserved blocks"), |
632 | &rfs->reserve_blocks); | |
633 | if (retval) | |
634 | return retval; | |
635 | ||
636 | retval = adjust_fs_info(fs, rfs->old_fs, rfs->reserve_blocks, new_size); | |
bf69235a TT |
637 | if (retval) |
638 | goto errout; | |
639 | ||
640 | /* | |
641 | * Check to make sure there are enough inodes | |
642 | */ | |
643 | if ((rfs->old_fs->super->s_inodes_count - | |
644 | rfs->old_fs->super->s_free_inodes_count) > | |
645 | rfs->new_fs->super->s_inodes_count) { | |
646 | retval = ENOSPC; | |
647 | goto errout; | |
648 | } | |
649 | ||
650 | /* | |
651 | * If we are shrinking the number block groups, we're done and | |
652 | * can exit now. | |
653 | */ | |
654 | if (rfs->old_fs->group_desc_count > fs->group_desc_count) { | |
655 | retval = 0; | |
656 | goto errout; | |
657 | } | |
658 | ||
659 | /* | |
660 | * If the number of block groups is staying the same, we're | |
661 | * done and can exit now. (If the number block groups is | |
662 | * shrinking, we had exited earlier.) | |
663 | */ | |
664 | if (rfs->old_fs->group_desc_count >= fs->group_desc_count) { | |
665 | retval = 0; | |
666 | goto errout; | |
667 | } | |
668 | ||
669 | /* | |
2d8c0c8a TT |
670 | * If we are using uninit_bg (aka GDT_CSUM) and the kernel |
671 | * supports lazy inode initialization, we can skip | |
672 | * initializing the inode table. | |
673 | */ | |
674 | if (lazy_itable_init && | |
675 | EXT2_HAS_RO_COMPAT_FEATURE(fs->super, | |
676 | EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
677 | retval = 0; | |
678 | goto errout; | |
679 | } | |
680 | ||
681 | /* | |
682 | * Initialize the inode table | |
bf69235a | 683 | */ |
e5aace90 | 684 | retval = ext2fs_get_array(fs->blocksize, fs->inode_blocks_per_group, |
bf69235a TT |
685 | &rfs->itable_buf); |
686 | if (retval) | |
687 | goto errout; | |
688 | ||
689 | memset(rfs->itable_buf, 0, fs->blocksize * fs->inode_blocks_per_group); | |
027b0577 TT |
690 | group_block = ext2fs_group_first_block2(fs, |
691 | rfs->old_fs->group_desc_count); | |
bf69235a TT |
692 | adj = rfs->old_fs->group_desc_count; |
693 | max_group = fs->group_desc_count - adj; | |
694 | if (rfs->progress) { | |
695 | retval = rfs->progress(rfs, E2_RSZ_EXTEND_ITABLE_PASS, | |
696 | 0, max_group); | |
697 | if (retval) | |
698 | goto errout; | |
699 | } | |
700 | for (i = rfs->old_fs->group_desc_count; | |
701 | i < fs->group_desc_count; i++) { | |
05e112a1 TT |
702 | /* |
703 | * Write out the new inode table | |
704 | */ | |
24a117ab | 705 | retval = io_channel_write_blk64(fs->io, |
d7cca6b0 | 706 | ext2fs_inode_table_loc(fs, i), |
24a117ab VAH |
707 | fs->inode_blocks_per_group, |
708 | rfs->itable_buf); | |
c762c8e6 TT |
709 | if (retval) goto errout; |
710 | ||
a8519a2d | 711 | io_channel_flush(fs->io); |
3b627e8d TT |
712 | if (rfs->progress) { |
713 | retval = rfs->progress(rfs, E2_RSZ_EXTEND_ITABLE_PASS, | |
714 | i - adj + 1, max_group); | |
715 | if (retval) | |
716 | goto errout; | |
717 | } | |
1e1da29f | 718 | group_block += fs->super->s_blocks_per_group; |
24b2c7a7 | 719 | } |
c762c8e6 TT |
720 | io_channel_flush(fs->io); |
721 | retval = 0; | |
722 | ||
723 | errout: | |
c762c8e6 TT |
724 | return retval; |
725 | } | |
726 | ||
a8519a2d TT |
727 | /* -------------------------------------------------------------------- |
728 | * | |
729 | * Resize processing, phase 2. | |
730 | * | |
731 | * In this phase we adjust determine which blocks need to be moved, in | |
732 | * blocks_to_move(). We then copy the blocks to their ultimate new | |
733 | * destinations using block_mover(). Since we are copying blocks to | |
734 | * their new locations, again during this pass we can abort without | |
735 | * any problems. | |
736 | * -------------------------------------------------------------------- | |
737 | */ | |
738 | ||
c762c8e6 TT |
739 | /* |
740 | * This helper function creates a block bitmap with all of the | |
741 | * filesystem meta-data blocks. | |
742 | */ | |
743 | static errcode_t mark_table_blocks(ext2_filsys fs, | |
64ad98ac | 744 | ext2fs_block_bitmap bmap) |
c762c8e6 | 745 | { |
54434927 | 746 | dgrp_t i; |
f026f1a3 | 747 | blk64_t blk; |
c762c8e6 | 748 | |
c762c8e6 | 749 | for (i = 0; i < fs->group_desc_count; i++) { |
64ad98ac | 750 | ext2fs_reserve_super_and_bgd(fs, i, bmap); |
efc6f628 | 751 | |
c762c8e6 TT |
752 | /* |
753 | * Mark the blocks used for the inode table | |
754 | */ | |
f026f1a3 TT |
755 | blk = ext2fs_inode_table_loc(fs, i); |
756 | if (blk) | |
757 | ext2fs_mark_block_bitmap_range2(bmap, blk, | |
758 | fs->inode_blocks_per_group); | |
efc6f628 | 759 | |
c762c8e6 | 760 | /* |
efc6f628 | 761 | * Mark block used for the block bitmap |
c762c8e6 | 762 | */ |
f026f1a3 TT |
763 | blk = ext2fs_block_bitmap_loc(fs, i); |
764 | if (blk) | |
765 | ext2fs_mark_block_bitmap2(bmap, blk); | |
64ad98ac | 766 | |
c762c8e6 | 767 | /* |
efc6f628 | 768 | * Mark block used for the inode bitmap |
c762c8e6 | 769 | */ |
f026f1a3 TT |
770 | blk = ext2fs_inode_bitmap_loc(fs, i); |
771 | if (blk) | |
772 | ext2fs_mark_block_bitmap2(bmap, blk); | |
c762c8e6 | 773 | } |
1e1da29f | 774 | return 0; |
24b2c7a7 TT |
775 | } |
776 | ||
76dd5e5c TT |
777 | /* |
778 | * This function checks to see if a particular block (either a | |
779 | * superblock or a block group descriptor) overlaps with an inode or | |
780 | * block bitmap block, or with the inode table. | |
781 | */ | |
782 | static void mark_fs_metablock(ext2_resize_t rfs, | |
783 | ext2fs_block_bitmap meta_bmap, | |
8728d506 | 784 | int group, blk64_t blk) |
76dd5e5c TT |
785 | { |
786 | ext2_filsys fs = rfs->new_fs; | |
efc6f628 | 787 | |
3346084b | 788 | ext2fs_mark_block_bitmap2(rfs->reserve_blocks, blk); |
48f23054 | 789 | ext2fs_block_alloc_stats2(fs, blk, +1); |
76dd5e5c TT |
790 | |
791 | /* | |
792 | * Check to see if we overlap with the inode or block bitmap, | |
793 | * or the inode tables. If not, and the block is in use, then | |
794 | * mark it as a block to be moved. | |
795 | */ | |
796 | if (IS_BLOCK_BM(fs, group, blk)) { | |
d7cca6b0 | 797 | ext2fs_block_bitmap_loc_set(fs, group, 0); |
76dd5e5c | 798 | rfs->needed_blocks++; |
ddcf1dbf TT |
799 | return; |
800 | } | |
801 | if (IS_INODE_BM(fs, group, blk)) { | |
d7cca6b0 | 802 | ext2fs_inode_bitmap_loc_set(fs, group, 0); |
76dd5e5c | 803 | rfs->needed_blocks++; |
ddcf1dbf TT |
804 | return; |
805 | } | |
806 | if (IS_INODE_TB(fs, group, blk)) { | |
d7cca6b0 | 807 | ext2fs_inode_table_loc_set(fs, group, 0); |
76dd5e5c | 808 | rfs->needed_blocks++; |
ddcf1dbf TT |
809 | return; |
810 | } | |
811 | if (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_FLEX_BG) { | |
812 | dgrp_t i; | |
813 | ||
814 | for (i=0; i < rfs->old_fs->group_desc_count; i++) { | |
815 | if (IS_BLOCK_BM(fs, i, blk)) { | |
816 | ext2fs_block_bitmap_loc_set(fs, i, 0); | |
817 | rfs->needed_blocks++; | |
818 | return; | |
819 | } | |
820 | if (IS_INODE_BM(fs, i, blk)) { | |
821 | ext2fs_inode_bitmap_loc_set(fs, i, 0); | |
822 | rfs->needed_blocks++; | |
823 | return; | |
824 | } | |
825 | if (IS_INODE_TB(fs, i, blk)) { | |
826 | ext2fs_inode_table_loc_set(fs, i, 0); | |
827 | rfs->needed_blocks++; | |
828 | return; | |
829 | } | |
830 | } | |
831 | } | |
832 | if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super, | |
833 | EXT4_FEATURE_RO_COMPAT_GDT_CSUM) && | |
cd65a24e | 834 | (ext2fs_bg_flags_test(fs, group, EXT2_BG_BLOCK_UNINIT))) { |
86acdebd TT |
835 | /* |
836 | * If the block bitmap is uninitialized, which means | |
837 | * nothing other than standard metadata in use. | |
838 | */ | |
839 | return; | |
3346084b VAH |
840 | } else if (ext2fs_test_block_bitmap2(rfs->old_fs->block_map, blk) && |
841 | !ext2fs_test_block_bitmap2(meta_bmap, blk)) { | |
842 | ext2fs_mark_block_bitmap2(rfs->move_blocks, blk); | |
76dd5e5c TT |
843 | rfs->needed_blocks++; |
844 | } | |
845 | } | |
846 | ||
847 | ||
24b2c7a7 TT |
848 | /* |
849 | * This routine marks and unmarks reserved blocks in the new block | |
850 | * bitmap. It also determines which blocks need to be moved and | |
851 | * places this information into the move_blocks bitmap. | |
852 | */ | |
c762c8e6 | 853 | static errcode_t blocks_to_move(ext2_resize_t rfs) |
24b2c7a7 | 854 | { |
54434927 | 855 | int j, has_super; |
86acdebd | 856 | dgrp_t i, max_groups, g; |
8728d506 VAH |
857 | blk64_t blk, group_blk; |
858 | blk64_t old_blocks, new_blocks; | |
54434927 | 859 | unsigned int meta_bg, meta_bg_size; |
24b2c7a7 | 860 | errcode_t retval; |
c762c8e6 TT |
861 | ext2_filsys fs, old_fs; |
862 | ext2fs_block_bitmap meta_bmap; | |
4b04fb30 | 863 | int flex_bg; |
24b2c7a7 | 864 | |
c762c8e6 TT |
865 | fs = rfs->new_fs; |
866 | old_fs = rfs->old_fs; | |
4efbac6f | 867 | if (ext2fs_blocks_count(old_fs->super) > ext2fs_blocks_count(fs->super)) |
c762c8e6 | 868 | fs = rfs->old_fs; |
efc6f628 | 869 | |
a13575f4 | 870 | retval = ext2fs_allocate_block_bitmap(fs, _("blocks to be moved"), |
c762c8e6 TT |
871 | &rfs->move_blocks); |
872 | if (retval) | |
873 | return retval; | |
874 | ||
efc6f628 | 875 | retval = ext2fs_allocate_block_bitmap(fs, _("meta-data blocks"), |
64ad98ac TT |
876 | &meta_bmap); |
877 | if (retval) | |
878 | return retval; | |
efc6f628 | 879 | |
64ad98ac | 880 | retval = mark_table_blocks(old_fs, meta_bmap); |
c762c8e6 TT |
881 | if (retval) |
882 | return retval; | |
883 | ||
884 | fs = rfs->new_fs; | |
efc6f628 | 885 | |
1e1da29f TT |
886 | /* |
887 | * If we're shrinking the filesystem, we need to move all of | |
888 | * the blocks that don't fit any more | |
889 | */ | |
4efbac6f VAH |
890 | for (blk = ext2fs_blocks_count(fs->super); |
891 | blk < ext2fs_blocks_count(old_fs->super); blk++) { | |
6493f8e8 | 892 | g = ext2fs_group_of_blk2(fs, blk); |
86acdebd TT |
893 | if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super, |
894 | EXT4_FEATURE_RO_COMPAT_GDT_CSUM) && | |
cd65a24e | 895 | ext2fs_bg_flags_test(old_fs, g, EXT2_BG_BLOCK_UNINIT)) { |
86acdebd TT |
896 | /* |
897 | * The block bitmap is uninitialized, so skip | |
898 | * to the next block group. | |
899 | */ | |
5d3a88fb | 900 | blk = ext2fs_group_first_block2(fs, g+1) - 1; |
86acdebd TT |
901 | continue; |
902 | } | |
3346084b VAH |
903 | if (ext2fs_test_block_bitmap2(old_fs->block_map, blk) && |
904 | !ext2fs_test_block_bitmap2(meta_bmap, blk)) { | |
905 | ext2fs_mark_block_bitmap2(rfs->move_blocks, blk); | |
1e1da29f | 906 | rfs->needed_blocks++; |
c762c8e6 | 907 | } |
3346084b | 908 | ext2fs_mark_block_bitmap2(rfs->reserve_blocks, blk); |
1e1da29f | 909 | } |
efc6f628 | 910 | |
76dd5e5c TT |
911 | if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) { |
912 | old_blocks = old_fs->super->s_first_meta_bg; | |
913 | new_blocks = fs->super->s_first_meta_bg; | |
914 | } else { | |
9213a93b TT |
915 | old_blocks = old_fs->desc_blocks + old_fs->super->s_reserved_gdt_blocks; |
916 | new_blocks = fs->desc_blocks + fs->super->s_reserved_gdt_blocks; | |
76dd5e5c | 917 | } |
efc6f628 | 918 | |
c762c8e6 TT |
919 | if (old_blocks == new_blocks) { |
920 | retval = 0; | |
921 | goto errout; | |
922 | } | |
24b2c7a7 | 923 | |
1333fe93 TT |
924 | max_groups = fs->group_desc_count; |
925 | if (max_groups > old_fs->group_desc_count) | |
926 | max_groups = old_fs->group_desc_count; | |
c762c8e6 | 927 | group_blk = old_fs->super->s_first_data_block; |
24b2c7a7 TT |
928 | /* |
929 | * If we're reducing the number of descriptor blocks, this | |
930 | * makes life easy. :-) We just have to mark some extra | |
931 | * blocks as free. | |
932 | */ | |
933 | if (old_blocks > new_blocks) { | |
1333fe93 | 934 | for (i = 0; i < max_groups; i++) { |
1e1da29f TT |
935 | if (!ext2fs_bg_has_super(fs, i)) { |
936 | group_blk += fs->super->s_blocks_per_group; | |
24b2c7a7 TT |
937 | continue; |
938 | } | |
c762c8e6 TT |
939 | for (blk = group_blk+1+new_blocks; |
940 | blk < group_blk+1+old_blocks; blk++) { | |
48f23054 | 941 | ext2fs_block_alloc_stats2(fs, blk, -1); |
052db4b7 TT |
942 | rfs->needed_blocks--; |
943 | } | |
1e1da29f | 944 | group_blk += fs->super->s_blocks_per_group; |
24b2c7a7 | 945 | } |
c762c8e6 TT |
946 | retval = 0; |
947 | goto errout; | |
24b2c7a7 TT |
948 | } |
949 | /* | |
950 | * If we're increasing the number of descriptor blocks, life | |
efc6f628 | 951 | * gets interesting.... |
24b2c7a7 | 952 | */ |
f2de1d38 | 953 | meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super); |
4b04fb30 TT |
954 | flex_bg = fs->super->s_feature_incompat & |
955 | EXT4_FEATURE_INCOMPAT_FLEX_BG; | |
2ebaeb35 | 956 | /* first reserve all of the existing fs meta blocks */ |
1333fe93 | 957 | for (i = 0; i < max_groups; i++) { |
76dd5e5c TT |
958 | has_super = ext2fs_bg_has_super(fs, i); |
959 | if (has_super) | |
960 | mark_fs_metablock(rfs, meta_bmap, i, group_blk); | |
961 | ||
962 | meta_bg = i / meta_bg_size; | |
963 | if (!(fs->super->s_feature_incompat & | |
964 | EXT2_FEATURE_INCOMPAT_META_BG) || | |
965 | (meta_bg < fs->super->s_first_meta_bg)) { | |
424cb7b6 TT |
966 | if (has_super) { |
967 | for (blk = group_blk+1; | |
968 | blk < group_blk + 1 + new_blocks; blk++) | |
efc6f628 | 969 | mark_fs_metablock(rfs, meta_bmap, |
424cb7b6 TT |
970 | i, blk); |
971 | } | |
76dd5e5c TT |
972 | } else { |
973 | if (has_super) | |
974 | has_super = 1; | |
975 | if (((i % meta_bg_size) == 0) || | |
976 | ((i % meta_bg_size) == 1) || | |
977 | ((i % meta_bg_size) == (meta_bg_size-1))) | |
978 | mark_fs_metablock(rfs, meta_bmap, i, | |
979 | group_blk + has_super); | |
24b2c7a7 | 980 | } |
76dd5e5c | 981 | |
1e1da29f | 982 | /* |
c762c8e6 TT |
983 | * Reserve the existing meta blocks that we know |
984 | * aren't to be moved. | |
4b04fb30 TT |
985 | * |
986 | * For flex_bg file systems, in order to avoid | |
987 | * overwriting fs metadata (especially inode table | |
988 | * blocks) belonging to a different block group when | |
989 | * we are relocating the inode tables, we need to | |
990 | * reserve all existing fs metadata blocks. | |
1e1da29f | 991 | */ |
d7cca6b0 | 992 | if (ext2fs_block_bitmap_loc(fs, i)) |
3346084b | 993 | ext2fs_mark_block_bitmap2(rfs->reserve_blocks, |
d7cca6b0 | 994 | ext2fs_block_bitmap_loc(fs, i)); |
4b04fb30 TT |
995 | else if (flex_bg && i < old_fs->group_desc_count) |
996 | ext2fs_mark_block_bitmap2(rfs->reserve_blocks, | |
997 | ext2fs_block_bitmap_loc(old_fs, i)); | |
998 | ||
d7cca6b0 | 999 | if (ext2fs_inode_bitmap_loc(fs, i)) |
3346084b | 1000 | ext2fs_mark_block_bitmap2(rfs->reserve_blocks, |
d7cca6b0 | 1001 | ext2fs_inode_bitmap_loc(fs, i)); |
4b04fb30 TT |
1002 | else if (flex_bg && i < old_fs->group_desc_count) |
1003 | ext2fs_mark_block_bitmap2(rfs->reserve_blocks, | |
1004 | ext2fs_inode_bitmap_loc(old_fs, i)); | |
1005 | ||
d7cca6b0 | 1006 | if (ext2fs_inode_table_loc(fs, i)) |
a0ba54ec TT |
1007 | ext2fs_mark_block_bitmap_range2(rfs->reserve_blocks, |
1008 | ext2fs_inode_table_loc(fs, i), | |
1009 | fs->inode_blocks_per_group); | |
4b04fb30 | 1010 | else if (flex_bg && i < old_fs->group_desc_count) |
a0ba54ec TT |
1011 | ext2fs_mark_block_bitmap_range2(rfs->reserve_blocks, |
1012 | ext2fs_inode_table_loc(old_fs, i), | |
1013 | old_fs->inode_blocks_per_group); | |
24b2c7a7 | 1014 | |
2ebaeb35 TT |
1015 | group_blk += rfs->new_fs->super->s_blocks_per_group; |
1016 | } | |
1017 | ||
1018 | /* Allocate the missing data structures */ | |
1019 | for (i = 0; i < max_groups; i++) { | |
1020 | if (ext2fs_inode_table_loc(fs, i) && | |
1021 | ext2fs_inode_bitmap_loc(fs, i) && | |
1022 | ext2fs_block_bitmap_loc(fs, i)) | |
1023 | continue; | |
1024 | ||
1e1da29f TT |
1025 | retval = ext2fs_allocate_group_table(fs, i, |
1026 | rfs->reserve_blocks); | |
1027 | if (retval) | |
c762c8e6 | 1028 | goto errout; |
24b2c7a7 | 1029 | |
1e1da29f | 1030 | /* |
c762c8e6 TT |
1031 | * For those structures that have changed, we need to |
1032 | * do bookkeepping. | |
1e1da29f | 1033 | */ |
d7cca6b0 VAH |
1034 | if (ext2fs_block_bitmap_loc(old_fs, i) != |
1035 | (blk = ext2fs_block_bitmap_loc(fs, i))) { | |
48f23054 | 1036 | ext2fs_block_alloc_stats2(fs, blk, +1); |
3346084b VAH |
1037 | if (ext2fs_test_block_bitmap2(old_fs->block_map, blk) && |
1038 | !ext2fs_test_block_bitmap2(meta_bmap, blk)) | |
1039 | ext2fs_mark_block_bitmap2(rfs->move_blocks, | |
c762c8e6 TT |
1040 | blk); |
1041 | } | |
d7cca6b0 VAH |
1042 | if (ext2fs_inode_bitmap_loc(old_fs, i) != |
1043 | (blk = ext2fs_inode_bitmap_loc(fs, i))) { | |
48f23054 | 1044 | ext2fs_block_alloc_stats2(fs, blk, +1); |
3346084b VAH |
1045 | if (ext2fs_test_block_bitmap2(old_fs->block_map, blk) && |
1046 | !ext2fs_test_block_bitmap2(meta_bmap, blk)) | |
1047 | ext2fs_mark_block_bitmap2(rfs->move_blocks, | |
c762c8e6 TT |
1048 | blk); |
1049 | } | |
24b2c7a7 | 1050 | |
052db4b7 TT |
1051 | /* |
1052 | * The inode table, if we need to relocate it, is | |
1053 | * handled specially. We have to reserve the blocks | |
1054 | * for both the old and the new inode table, since we | |
1055 | * can't have the inode table be destroyed during the | |
1056 | * block relocation phase. | |
1057 | */ | |
d7cca6b0 | 1058 | if (ext2fs_inode_table_loc(fs, i) == ext2fs_inode_table_loc(old_fs, i)) |
2ebaeb35 | 1059 | continue; /* inode table not moved */ |
052db4b7 | 1060 | |
c762c8e6 | 1061 | rfs->needed_blocks += fs->inode_blocks_per_group; |
052db4b7 TT |
1062 | |
1063 | /* | |
1064 | * Mark the new inode table as in use in the new block | |
efc6f628 | 1065 | * allocation bitmap, and move any blocks that might |
c762c8e6 | 1066 | * be necessary. |
052db4b7 | 1067 | */ |
d7cca6b0 | 1068 | for (blk = ext2fs_inode_table_loc(fs, i), j=0; |
c762c8e6 | 1069 | j < fs->inode_blocks_per_group ; j++, blk++) { |
48f23054 | 1070 | ext2fs_block_alloc_stats2(fs, blk, +1); |
3346084b VAH |
1071 | if (ext2fs_test_block_bitmap2(old_fs->block_map, blk) && |
1072 | !ext2fs_test_block_bitmap2(meta_bmap, blk)) | |
1073 | ext2fs_mark_block_bitmap2(rfs->move_blocks, | |
c762c8e6 TT |
1074 | blk); |
1075 | } | |
efc6f628 | 1076 | |
1e1da29f | 1077 | /* |
052db4b7 TT |
1078 | * Make sure the old inode table is reserved in the |
1079 | * block reservation bitmap. | |
1e1da29f | 1080 | */ |
d7cca6b0 | 1081 | for (blk = ext2fs_inode_table_loc(rfs->old_fs, i), j=0; |
052db4b7 | 1082 | j < fs->inode_blocks_per_group ; j++, blk++) |
3346084b | 1083 | ext2fs_mark_block_bitmap2(rfs->reserve_blocks, blk); |
1e1da29f | 1084 | } |
c762c8e6 TT |
1085 | retval = 0; |
1086 | ||
1087 | errout: | |
1088 | if (meta_bmap) | |
1089 | ext2fs_free_block_bitmap(meta_bmap); | |
efc6f628 | 1090 | |
c762c8e6 | 1091 | return retval; |
1e1da29f | 1092 | } |
24b2c7a7 | 1093 | |
a8519a2d TT |
1094 | /* |
1095 | * This helper function tries to allocate a new block. We try to | |
1096 | * avoid hitting the original group descriptor blocks at least at | |
1097 | * first, since we want to make it possible to recover from a badly | |
1098 | * aborted resize operation as much as possible. | |
1099 | * | |
1100 | * In the future, I may further modify this routine to balance out | |
1101 | * where we get the new blocks across the various block groups. | |
1102 | * Ideally we would allocate blocks that corresponded with the block | |
1103 | * group of the containing inode, and keep contiguous blocks | |
1104 | * together. However, this very difficult to do efficiently, since we | |
1105 | * don't have the necessary information up front. | |
1106 | */ | |
1107 | ||
1108 | #define AVOID_OLD 1 | |
1109 | #define DESPERATION 2 | |
1110 | ||
1111 | static void init_block_alloc(ext2_resize_t rfs) | |
1112 | { | |
1113 | rfs->alloc_state = AVOID_OLD; | |
1114 | rfs->new_blk = rfs->new_fs->super->s_first_data_block; | |
2bc4d4f7 TT |
1115 | #if 0 |
1116 | /* HACK for testing */ | |
4efbac6f VAH |
1117 | if (ext2fs_blocks_count(rfs->new_fs->super) > |
1118 | ext2fs_blocks_count(rfs->old_fs->super)) | |
1119 | rfs->new_blk = ext2fs_blocks_count(rfs->old_fs->super); | |
2bc4d4f7 | 1120 | #endif |
a8519a2d TT |
1121 | } |
1122 | ||
8728d506 | 1123 | static blk64_t get_new_block(ext2_resize_t rfs) |
a8519a2d TT |
1124 | { |
1125 | ext2_filsys fs = rfs->new_fs; | |
efc6f628 | 1126 | |
a8519a2d | 1127 | while (1) { |
4efbac6f | 1128 | if (rfs->new_blk >= ext2fs_blocks_count(fs->super)) { |
a8519a2d TT |
1129 | if (rfs->alloc_state == DESPERATION) |
1130 | return 0; | |
1131 | ||
1132 | #ifdef RESIZE2FS_DEBUG | |
1133 | if (rfs->flags & RESIZE_DEBUG_BMOVE) | |
f35fd3d5 TT |
1134 | printf("Going into desperation mode " |
1135 | "for block allocations\n"); | |
efc6f628 | 1136 | #endif |
a8519a2d TT |
1137 | rfs->alloc_state = DESPERATION; |
1138 | rfs->new_blk = fs->super->s_first_data_block; | |
1139 | continue; | |
1140 | } | |
3346084b VAH |
1141 | if (ext2fs_test_block_bitmap2(fs->block_map, rfs->new_blk) || |
1142 | ext2fs_test_block_bitmap2(rfs->reserve_blocks, | |
a8519a2d TT |
1143 | rfs->new_blk) || |
1144 | ((rfs->alloc_state == AVOID_OLD) && | |
4efbac6f | 1145 | (rfs->new_blk < ext2fs_blocks_count(rfs->old_fs->super)) && |
3346084b | 1146 | ext2fs_test_block_bitmap2(rfs->old_fs->block_map, |
a8519a2d TT |
1147 | rfs->new_blk))) { |
1148 | rfs->new_blk++; | |
1149 | continue; | |
1150 | } | |
1151 | return rfs->new_blk; | |
1152 | } | |
1153 | } | |
1154 | ||
7f9c96ee TT |
1155 | static errcode_t resize2fs_get_alloc_block(ext2_filsys fs, blk64_t goal, |
1156 | blk64_t *ret) | |
1157 | { | |
1158 | ext2_resize_t rfs = (ext2_resize_t) fs->priv_data; | |
8728d506 | 1159 | blk64_t blk; |
7f9c96ee TT |
1160 | |
1161 | blk = get_new_block(rfs); | |
1162 | if (!blk) | |
1163 | return ENOSPC; | |
1164 | ||
1165 | #ifdef RESIZE2FS_DEBUG | |
1166 | if (rfs->flags & 0xF) | |
8728d506 | 1167 | printf("get_alloc_block allocating %llu\n", blk); |
7f9c96ee TT |
1168 | #endif |
1169 | ||
3346084b VAH |
1170 | ext2fs_mark_block_bitmap2(rfs->old_fs->block_map, blk); |
1171 | ext2fs_mark_block_bitmap2(rfs->new_fs->block_map, blk); | |
7f9c96ee TT |
1172 | *ret = (blk64_t) blk; |
1173 | return 0; | |
1174 | } | |
1175 | ||
a8519a2d TT |
1176 | static errcode_t block_mover(ext2_resize_t rfs) |
1177 | { | |
8728d506 | 1178 | blk64_t blk, old_blk, new_blk; |
a8519a2d TT |
1179 | ext2_filsys fs = rfs->new_fs; |
1180 | ext2_filsys old_fs = rfs->old_fs; | |
1181 | errcode_t retval; | |
8728d506 VAH |
1182 | __u64 size; |
1183 | int c; | |
a8519a2d | 1184 | int to_move, moved; |
7d7bdd57 TT |
1185 | ext2_badblocks_list badblock_list = 0; |
1186 | int bb_modified = 0; | |
efc6f628 | 1187 | |
7f9c96ee TT |
1188 | fs->get_alloc_block = resize2fs_get_alloc_block; |
1189 | old_fs->get_alloc_block = resize2fs_get_alloc_block; | |
1190 | ||
7d7bdd57 TT |
1191 | retval = ext2fs_read_bb_inode(old_fs, &badblock_list); |
1192 | if (retval) | |
1193 | return retval; | |
a8519a2d TT |
1194 | |
1195 | new_blk = fs->super->s_first_data_block; | |
1196 | if (!rfs->itable_buf) { | |
e5aace90 | 1197 | retval = ext2fs_get_array(fs->blocksize, |
a8519a2d | 1198 | fs->inode_blocks_per_group, |
c4e3d3f3 | 1199 | &rfs->itable_buf); |
a8519a2d TT |
1200 | if (retval) |
1201 | return retval; | |
1202 | } | |
1203 | retval = ext2fs_create_extent_table(&rfs->bmap, 0); | |
1204 | if (retval) | |
1205 | return retval; | |
1206 | ||
1207 | /* | |
1208 | * The first step is to figure out where all of the blocks | |
1209 | * will go. | |
1210 | */ | |
1211 | to_move = moved = 0; | |
1212 | init_block_alloc(rfs); | |
d1a1a583 TT |
1213 | for (blk = B2C(old_fs->super->s_first_data_block); |
1214 | blk < ext2fs_blocks_count(old_fs->super); | |
1215 | blk += EXT2FS_CLUSTER_RATIO(fs)) { | |
3346084b | 1216 | if (!ext2fs_test_block_bitmap2(old_fs->block_map, blk)) |
a8519a2d | 1217 | continue; |
3346084b | 1218 | if (!ext2fs_test_block_bitmap2(rfs->move_blocks, blk)) |
a8519a2d | 1219 | continue; |
7d7bdd57 TT |
1220 | if (ext2fs_badblocks_list_test(badblock_list, blk)) { |
1221 | ext2fs_badblocks_list_del(badblock_list, blk); | |
1222 | bb_modified++; | |
1223 | continue; | |
1224 | } | |
a8519a2d TT |
1225 | |
1226 | new_blk = get_new_block(rfs); | |
1227 | if (!new_blk) { | |
1228 | retval = ENOSPC; | |
1229 | goto errout; | |
1230 | } | |
48f23054 | 1231 | ext2fs_block_alloc_stats2(fs, new_blk, +1); |
d1a1a583 | 1232 | ext2fs_add_extent_entry(rfs->bmap, B2C(blk), B2C(new_blk)); |
a8519a2d TT |
1233 | to_move++; |
1234 | } | |
efc6f628 | 1235 | |
a8519a2d | 1236 | if (to_move == 0) { |
cefbf487 TT |
1237 | if (rfs->bmap) { |
1238 | ext2fs_free_extent_table(rfs->bmap); | |
1239 | rfs->bmap = 0; | |
1240 | } | |
a8519a2d TT |
1241 | retval = 0; |
1242 | goto errout; | |
1243 | } | |
1244 | ||
1245 | /* | |
1246 | * Step two is to actually move the blocks | |
1247 | */ | |
1248 | retval = ext2fs_iterate_extent(rfs->bmap, 0, 0, 0); | |
1249 | if (retval) goto errout; | |
1250 | ||
3b627e8d TT |
1251 | if (rfs->progress) { |
1252 | retval = (rfs->progress)(rfs, E2_RSZ_BLOCK_RELOC_PASS, | |
1253 | 0, to_move); | |
1254 | if (retval) | |
1255 | goto errout; | |
1256 | } | |
a8519a2d TT |
1257 | while (1) { |
1258 | retval = ext2fs_iterate_extent(rfs->bmap, &old_blk, &new_blk, &size); | |
1259 | if (retval) goto errout; | |
1260 | if (!size) | |
1261 | break; | |
d1a1a583 TT |
1262 | old_blk = C2B(old_blk); |
1263 | new_blk = C2B(new_blk); | |
1264 | size = C2B(size); | |
a8519a2d TT |
1265 | #ifdef RESIZE2FS_DEBUG |
1266 | if (rfs->flags & RESIZE_DEBUG_BMOVE) | |
8728d506 | 1267 | printf("Moving %llu blocks %llu->%llu\n", |
f35fd3d5 | 1268 | size, old_blk, new_blk); |
a8519a2d TT |
1269 | #endif |
1270 | do { | |
1271 | c = size; | |
1272 | if (c > fs->inode_blocks_per_group) | |
1273 | c = fs->inode_blocks_per_group; | |
24a117ab VAH |
1274 | retval = io_channel_read_blk64(fs->io, old_blk, c, |
1275 | rfs->itable_buf); | |
a8519a2d | 1276 | if (retval) goto errout; |
24a117ab VAH |
1277 | retval = io_channel_write_blk64(fs->io, new_blk, c, |
1278 | rfs->itable_buf); | |
a8519a2d TT |
1279 | if (retval) goto errout; |
1280 | size -= c; | |
1281 | new_blk += c; | |
1282 | old_blk += c; | |
1283 | moved += c; | |
1284 | if (rfs->progress) { | |
1285 | io_channel_flush(fs->io); | |
3b627e8d TT |
1286 | retval = (rfs->progress)(rfs, |
1287 | E2_RSZ_BLOCK_RELOC_PASS, | |
a8519a2d | 1288 | moved, to_move); |
3b627e8d TT |
1289 | if (retval) |
1290 | goto errout; | |
a8519a2d TT |
1291 | } |
1292 | } while (size > 0); | |
1293 | io_channel_flush(fs->io); | |
1294 | } | |
1295 | ||
1296 | errout: | |
7d7bdd57 TT |
1297 | if (badblock_list) { |
1298 | if (!retval && bb_modified) | |
1299 | retval = ext2fs_update_bb_inode(old_fs, | |
1300 | badblock_list); | |
1301 | ext2fs_badblocks_list_free(badblock_list); | |
1302 | } | |
a8519a2d TT |
1303 | return retval; |
1304 | } | |
1305 | ||
1306 | ||
1307 | /* -------------------------------------------------------------------- | |
1308 | * | |
1309 | * Resize processing, phase 3 | |
1310 | * | |
1311 | * -------------------------------------------------------------------- | |
1312 | */ | |
1313 | ||
1314 | ||
d1a1a583 TT |
1315 | /* |
1316 | * The extent translation table is stored in clusters so we need to | |
1317 | * take special care when mapping a source block number to its | |
1318 | * destination block number. | |
1319 | */ | |
1320 | __u64 extent_translate(ext2_filsys fs, ext2_extent extent, __u64 old_loc) | |
1321 | { | |
1322 | __u64 new_block = C2B(ext2fs_extent_translate(extent, B2C(old_loc))); | |
1323 | ||
1324 | if (new_block != 0) | |
1325 | new_block += old_loc & (EXT2FS_CLUSTER_RATIO(fs) - 1); | |
1326 | return new_block; | |
1327 | } | |
1328 | ||
a8519a2d TT |
1329 | struct process_block_struct { |
1330 | ext2_resize_t rfs; | |
dfcdc32f | 1331 | ext2_ino_t ino; |
a8519a2d TT |
1332 | struct ext2_inode * inode; |
1333 | errcode_t error; | |
1334 | int is_dir; | |
1335 | int changed; | |
1336 | }; | |
1337 | ||
8728d506 | 1338 | static int process_block(ext2_filsys fs, blk64_t *block_nr, |
efc6f628 | 1339 | e2_blkcnt_t blockcnt, |
8728d506 | 1340 | blk64_t ref_block EXT2FS_ATTR((unused)), |
54434927 | 1341 | int ref_offset EXT2FS_ATTR((unused)), void *priv_data) |
a8519a2d TT |
1342 | { |
1343 | struct process_block_struct *pb; | |
1344 | errcode_t retval; | |
8728d506 | 1345 | blk64_t block, new_block; |
a8519a2d TT |
1346 | int ret = 0; |
1347 | ||
1348 | pb = (struct process_block_struct *) priv_data; | |
1349 | block = *block_nr; | |
1350 | if (pb->rfs->bmap) { | |
d1a1a583 | 1351 | new_block = extent_translate(fs, pb->rfs->bmap, block); |
a8519a2d TT |
1352 | if (new_block) { |
1353 | *block_nr = new_block; | |
1354 | ret |= BLOCK_CHANGED; | |
1355 | pb->changed = 1; | |
1356 | #ifdef RESIZE2FS_DEBUG | |
1357 | if (pb->rfs->flags & RESIZE_DEBUG_BMOVE) | |
8728d506 | 1358 | printf("ino=%u, blockcnt=%lld, %llu->%llu\n", |
a8519a2d TT |
1359 | pb->ino, blockcnt, block, new_block); |
1360 | #endif | |
1361 | block = new_block; | |
1362 | } | |
1363 | } | |
1364 | if (pb->is_dir) { | |
8728d506 VAH |
1365 | retval = ext2fs_add_dir_block2(fs->dblist, pb->ino, |
1366 | block, (int) blockcnt); | |
a8519a2d TT |
1367 | if (retval) { |
1368 | pb->error = retval; | |
1369 | ret |= BLOCK_ABORT; | |
1370 | } | |
1371 | } | |
1372 | return ret; | |
1373 | } | |
1374 | ||
1375 | /* | |
1376 | * Progress callback | |
1377 | */ | |
efc6f628 | 1378 | static errcode_t progress_callback(ext2_filsys fs, |
54434927 | 1379 | ext2_inode_scan scan EXT2FS_ATTR((unused)), |
a8519a2d TT |
1380 | dgrp_t group, void * priv_data) |
1381 | { | |
1382 | ext2_resize_t rfs = (ext2_resize_t) priv_data; | |
3b627e8d | 1383 | errcode_t retval; |
a8519a2d TT |
1384 | |
1385 | /* | |
f4b2a6db TT |
1386 | * This check is to protect against old ext2 libraries. It |
1387 | * shouldn't be needed against new libraries. | |
a8519a2d | 1388 | */ |
f4b2a6db | 1389 | if ((group+1) == 0) |
a8519a2d TT |
1390 | return 0; |
1391 | ||
1392 | if (rfs->progress) { | |
1393 | io_channel_flush(fs->io); | |
3b627e8d TT |
1394 | retval = (rfs->progress)(rfs, E2_RSZ_INODE_SCAN_PASS, |
1395 | group+1, fs->group_desc_count); | |
1396 | if (retval) | |
1397 | return retval; | |
a8519a2d | 1398 | } |
efc6f628 | 1399 | |
a8519a2d TT |
1400 | return 0; |
1401 | } | |
1402 | ||
1403 | static errcode_t inode_scan_and_fix(ext2_resize_t rfs) | |
1404 | { | |
1405 | struct process_block_struct pb; | |
dfcdc32f | 1406 | ext2_ino_t ino, new_inode; |
edfd9b0a | 1407 | struct ext2_inode *inode = NULL; |
a8519a2d TT |
1408 | ext2_inode_scan scan = NULL; |
1409 | errcode_t retval; | |
a8519a2d | 1410 | char *block_buf = 0; |
dfcdc32f | 1411 | ext2_ino_t start_to_move; |
8728d506 VAH |
1412 | blk64_t orig_size; |
1413 | blk64_t new_block; | |
4ef28824 | 1414 | int inode_size; |
efc6f628 | 1415 | |
a8519a2d TT |
1416 | if ((rfs->old_fs->group_desc_count <= |
1417 | rfs->new_fs->group_desc_count) && | |
1418 | !rfs->bmap) | |
1419 | return 0; | |
1420 | ||
2bc4d4f7 TT |
1421 | /* |
1422 | * Save the original size of the old filesystem, and | |
1423 | * temporarily set the size to be the new size if the new size | |
1424 | * is larger. We need to do this to avoid catching an error | |
1425 | * by the block iterator routines | |
1426 | */ | |
4efbac6f VAH |
1427 | orig_size = ext2fs_blocks_count(rfs->old_fs->super); |
1428 | if (orig_size < ext2fs_blocks_count(rfs->new_fs->super)) | |
1429 | ext2fs_blocks_count_set(rfs->old_fs->super, | |
1430 | ext2fs_blocks_count(rfs->new_fs->super)); | |
2bc4d4f7 | 1431 | |
a8519a2d TT |
1432 | retval = ext2fs_open_inode_scan(rfs->old_fs, 0, &scan); |
1433 | if (retval) goto errout; | |
1434 | ||
1435 | retval = ext2fs_init_dblist(rfs->old_fs, 0); | |
1436 | if (retval) goto errout; | |
e5aace90 | 1437 | retval = ext2fs_get_array(rfs->old_fs->blocksize, 3, &block_buf); |
a8519a2d TT |
1438 | if (retval) goto errout; |
1439 | ||
1440 | start_to_move = (rfs->new_fs->group_desc_count * | |
1441 | rfs->new_fs->super->s_inodes_per_group); | |
efc6f628 | 1442 | |
3b627e8d TT |
1443 | if (rfs->progress) { |
1444 | retval = (rfs->progress)(rfs, E2_RSZ_INODE_SCAN_PASS, | |
1445 | 0, rfs->old_fs->group_desc_count); | |
1446 | if (retval) | |
1447 | goto errout; | |
1448 | } | |
a8519a2d TT |
1449 | ext2fs_set_inode_callback(scan, progress_callback, (void *) rfs); |
1450 | pb.rfs = rfs; | |
edfd9b0a | 1451 | pb.inode = inode; |
a8519a2d TT |
1452 | pb.error = 0; |
1453 | new_inode = EXT2_FIRST_INODE(rfs->new_fs->super); | |
4ef28824 | 1454 | inode_size = EXT2_INODE_SIZE(rfs->new_fs->super); |
edfd9b0a TT |
1455 | inode = malloc(inode_size); |
1456 | if (!inode) { | |
4ef28824 ES |
1457 | retval = ENOMEM; |
1458 | goto errout; | |
1459 | } | |
a8519a2d TT |
1460 | /* |
1461 | * First, copy all of the inodes that need to be moved | |
1462 | * elsewhere in the inode table | |
1463 | */ | |
1464 | while (1) { | |
edfd9b0a | 1465 | retval = ext2fs_get_next_inode_full(scan, &ino, inode, inode_size); |
a8519a2d TT |
1466 | if (retval) goto errout; |
1467 | if (!ino) | |
1468 | break; | |
1469 | ||
edfd9b0a | 1470 | if (inode->i_links_count == 0 && ino != EXT2_RESIZE_INO) |
a8519a2d TT |
1471 | continue; /* inode not in use */ |
1472 | ||
edfd9b0a | 1473 | pb.is_dir = LINUX_S_ISDIR(inode->i_mode); |
a8519a2d TT |
1474 | pb.changed = 0; |
1475 | ||
0c80c44b | 1476 | if (ext2fs_file_acl_block(rfs->old_fs, inode) && rfs->bmap) { |
d1a1a583 | 1477 | new_block = extent_translate(rfs->old_fs, rfs->bmap, |
0c80c44b | 1478 | ext2fs_file_acl_block(rfs->old_fs, inode)); |
ed909bbe | 1479 | if (new_block) { |
0c80c44b TT |
1480 | ext2fs_file_acl_block_set(rfs->old_fs, inode, |
1481 | new_block); | |
efc6f628 | 1482 | retval = ext2fs_write_inode_full(rfs->old_fs, |
edfd9b0a | 1483 | ino, inode, inode_size); |
ed909bbe TT |
1484 | if (retval) goto errout; |
1485 | } | |
1486 | } | |
efc6f628 | 1487 | |
0c80c44b | 1488 | if (ext2fs_inode_has_valid_blocks2(rfs->old_fs, inode) && |
a8519a2d TT |
1489 | (rfs->bmap || pb.is_dir)) { |
1490 | pb.ino = ino; | |
8728d506 | 1491 | retval = ext2fs_block_iterate3(rfs->old_fs, |
a8519a2d TT |
1492 | ino, 0, block_buf, |
1493 | process_block, &pb); | |
1494 | if (retval) | |
1495 | goto errout; | |
1496 | if (pb.error) { | |
1497 | retval = pb.error; | |
1498 | goto errout; | |
1499 | } | |
1500 | } | |
1501 | ||
1502 | if (ino <= start_to_move) | |
1503 | continue; /* Don't need to move it. */ | |
1504 | ||
1505 | /* | |
1506 | * Find a new inode | |
1507 | */ | |
86acdebd TT |
1508 | retval = ext2fs_new_inode(rfs->new_fs, 0, 0, 0, &new_inode); |
1509 | if (retval) | |
1510 | goto errout; | |
1511 | ||
74128f8d TT |
1512 | ext2fs_inode_alloc_stats2(rfs->new_fs, new_inode, +1, |
1513 | pb.is_dir); | |
a8519a2d TT |
1514 | if (pb.changed) { |
1515 | /* Get the new version of the inode */ | |
4ef28824 | 1516 | retval = ext2fs_read_inode_full(rfs->old_fs, ino, |
edfd9b0a | 1517 | inode, inode_size); |
a8519a2d TT |
1518 | if (retval) goto errout; |
1519 | } | |
edfd9b0a | 1520 | inode->i_ctime = time(0); |
4ef28824 | 1521 | retval = ext2fs_write_inode_full(rfs->old_fs, new_inode, |
edfd9b0a | 1522 | inode, inode_size); |
a8519a2d TT |
1523 | if (retval) goto errout; |
1524 | ||
a8519a2d TT |
1525 | #ifdef RESIZE2FS_DEBUG |
1526 | if (rfs->flags & RESIZE_DEBUG_INODEMAP) | |
f35fd3d5 | 1527 | printf("Inode moved %u->%u\n", ino, new_inode); |
a8519a2d TT |
1528 | #endif |
1529 | if (!rfs->imap) { | |
1530 | retval = ext2fs_create_extent_table(&rfs->imap, 0); | |
1531 | if (retval) | |
1532 | goto errout; | |
1533 | } | |
1534 | ext2fs_add_extent_entry(rfs->imap, ino, new_inode); | |
1535 | } | |
1536 | io_channel_flush(rfs->old_fs->io); | |
1537 | ||
1538 | errout: | |
4efbac6f | 1539 | ext2fs_blocks_count_set(rfs->old_fs->super, orig_size); |
a8519a2d TT |
1540 | if (rfs->bmap) { |
1541 | ext2fs_free_extent_table(rfs->bmap); | |
1542 | rfs->bmap = 0; | |
1543 | } | |
1544 | if (scan) | |
1545 | ext2fs_close_inode_scan(scan); | |
1546 | if (block_buf) | |
c4e3d3f3 | 1547 | ext2fs_free_mem(&block_buf); |
45e338f5 | 1548 | free(inode); |
a8519a2d TT |
1549 | return retval; |
1550 | } | |
1551 | ||
1552 | /* -------------------------------------------------------------------- | |
1553 | * | |
1554 | * Resize processing, phase 4. | |
1555 | * | |
1556 | * -------------------------------------------------------------------- | |
1557 | */ | |
1558 | ||
1559 | struct istruct { | |
1560 | ext2_resize_t rfs; | |
3b627e8d | 1561 | errcode_t err; |
03fa6f8a TT |
1562 | unsigned int max_dirs; |
1563 | unsigned int num; | |
a8519a2d TT |
1564 | }; |
1565 | ||
efc6f628 | 1566 | static int check_and_change_inodes(ext2_ino_t dir, |
54434927 | 1567 | int entry EXT2FS_ATTR((unused)), |
a8519a2d | 1568 | struct ext2_dir_entry *dirent, int offset, |
54434927 | 1569 | int blocksize EXT2FS_ATTR((unused)), |
efc6f628 | 1570 | char *buf EXT2FS_ATTR((unused)), |
54434927 | 1571 | void *priv_data) |
a8519a2d TT |
1572 | { |
1573 | struct istruct *is = (struct istruct *) priv_data; | |
085d2a83 TT |
1574 | struct ext2_inode inode; |
1575 | ext2_ino_t new_inode; | |
1576 | errcode_t retval; | |
a8519a2d TT |
1577 | |
1578 | if (is->rfs->progress && offset == 0) { | |
1579 | io_channel_flush(is->rfs->old_fs->io); | |
3b627e8d TT |
1580 | is->err = (is->rfs->progress)(is->rfs, |
1581 | E2_RSZ_INODE_REF_UPD_PASS, | |
1333fe93 | 1582 | ++is->num, is->max_dirs); |
3b627e8d TT |
1583 | if (is->err) |
1584 | return DIRENT_ABORT; | |
a8519a2d TT |
1585 | } |
1586 | ||
1587 | if (!dirent->inode) | |
1588 | return 0; | |
1589 | ||
1590 | new_inode = ext2fs_extent_translate(is->rfs->imap, dirent->inode); | |
1591 | ||
1592 | if (!new_inode) | |
1593 | return 0; | |
1594 | #ifdef RESIZE2FS_DEBUG | |
1595 | if (is->rfs->flags & RESIZE_DEBUG_INODEMAP) | |
f35fd3d5 | 1596 | printf("Inode translate (dir=%u, name=%.*s, %u->%u)\n", |
06191693 | 1597 | dir, dirent->name_len&0xFF, dirent->name, |
a8519a2d TT |
1598 | dirent->inode, new_inode); |
1599 | #endif | |
1600 | ||
1601 | dirent->inode = new_inode; | |
1602 | ||
085d2a83 TT |
1603 | /* Update the directory mtime and ctime */ |
1604 | retval = ext2fs_read_inode(is->rfs->old_fs, dir, &inode); | |
1605 | if (retval == 0) { | |
1606 | inode.i_mtime = inode.i_ctime = time(0); | |
d2b2a488 BB |
1607 | is->err = ext2fs_write_inode(is->rfs->old_fs, dir, &inode); |
1608 | if (is->err) | |
1609 | return DIRENT_ABORT; | |
085d2a83 TT |
1610 | } |
1611 | ||
a8519a2d TT |
1612 | return DIRENT_CHANGED; |
1613 | } | |
1614 | ||
1615 | static errcode_t inode_ref_fix(ext2_resize_t rfs) | |
1616 | { | |
1617 | errcode_t retval; | |
1618 | struct istruct is; | |
efc6f628 | 1619 | |
a8519a2d TT |
1620 | if (!rfs->imap) |
1621 | return 0; | |
efc6f628 | 1622 | |
a8519a2d TT |
1623 | /* |
1624 | * Now, we iterate over all of the directories to update the | |
1625 | * inode references | |
1626 | */ | |
1627 | is.num = 0; | |
8728d506 | 1628 | is.max_dirs = ext2fs_dblist_count2(rfs->old_fs->dblist); |
a8519a2d | 1629 | is.rfs = rfs; |
3b627e8d | 1630 | is.err = 0; |
a8519a2d | 1631 | |
3b627e8d TT |
1632 | if (rfs->progress) { |
1633 | retval = (rfs->progress)(rfs, E2_RSZ_INODE_REF_UPD_PASS, | |
1333fe93 | 1634 | 0, is.max_dirs); |
3b627e8d TT |
1635 | if (retval) |
1636 | goto errout; | |
1637 | } | |
efc6f628 | 1638 | |
a8519a2d TT |
1639 | retval = ext2fs_dblist_dir_iterate(rfs->old_fs->dblist, |
1640 | DIRENT_FLAG_INCLUDE_EMPTY, 0, | |
1641 | check_and_change_inodes, &is); | |
3b627e8d TT |
1642 | if (retval) |
1643 | goto errout; | |
1644 | if (is.err) { | |
1645 | retval = is.err; | |
1646 | goto errout; | |
1647 | } | |
a8519a2d | 1648 | |
88dbf828 TT |
1649 | if (rfs->progress && (is.num < is.max_dirs)) |
1650 | (rfs->progress)(rfs, E2_RSZ_INODE_REF_UPD_PASS, | |
1651 | is.max_dirs, is.max_dirs); | |
1652 | ||
3b627e8d | 1653 | errout: |
a8519a2d TT |
1654 | ext2fs_free_extent_table(rfs->imap); |
1655 | rfs->imap = 0; | |
1656 | return retval; | |
1657 | } | |
1658 | ||
1659 | ||
1660 | /* -------------------------------------------------------------------- | |
1661 | * | |
1662 | * Resize processing, phase 5. | |
1663 | * | |
1664 | * In this phase we actually move the inode table around, and then | |
1665 | * update the summary statistics. This is scary, since aborting here | |
1666 | * will potentially scramble the filesystem. (We are moving the | |
1667 | * inode tables around in place, and so the potential for lost data, | |
1668 | * or at the very least scrambling the mapping between filenames and | |
1669 | * inode numbers is very high in case of a power failure here.) | |
1670 | * -------------------------------------------------------------------- | |
1671 | */ | |
1672 | ||
24b2c7a7 | 1673 | |
052db4b7 TT |
1674 | /* |
1675 | * A very scary routine --- this one moves the inode table around!!! | |
1676 | * | |
1677 | * After this you have to use the rfs->new_fs file handle to read and | |
1678 | * write inodes. | |
1679 | */ | |
c762c8e6 | 1680 | static errcode_t move_itables(ext2_resize_t rfs) |
052db4b7 | 1681 | { |
8728d506 VAH |
1682 | int n, num, size; |
1683 | long long diff; | |
54434927 | 1684 | dgrp_t i, max_groups; |
052db4b7 | 1685 | ext2_filsys fs = rfs->new_fs; |
05e112a1 | 1686 | char *cp; |
8728d506 | 1687 | blk64_t old_blk, new_blk, blk; |
a8519a2d | 1688 | errcode_t retval; |
64ad98ac | 1689 | int j, to_move, moved; |
052db4b7 | 1690 | |
1333fe93 TT |
1691 | max_groups = fs->group_desc_count; |
1692 | if (max_groups > rfs->old_fs->group_desc_count) | |
1693 | max_groups = rfs->old_fs->group_desc_count; | |
052db4b7 | 1694 | |
05e112a1 TT |
1695 | size = fs->blocksize * fs->inode_blocks_per_group; |
1696 | if (!rfs->itable_buf) { | |
c4e3d3f3 | 1697 | retval = ext2fs_get_mem(size, &rfs->itable_buf); |
ca8abba7 TT |
1698 | if (retval) |
1699 | return retval; | |
05e112a1 | 1700 | } |
c762c8e6 TT |
1701 | |
1702 | /* | |
1703 | * Figure out how many inode tables we need to move | |
1704 | */ | |
1705 | to_move = moved = 0; | |
1333fe93 | 1706 | for (i=0; i < max_groups; i++) |
d7cca6b0 VAH |
1707 | if (ext2fs_inode_table_loc(rfs->old_fs, i) != |
1708 | ext2fs_inode_table_loc(fs, i)) | |
c762c8e6 TT |
1709 | to_move++; |
1710 | ||
1711 | if (to_move == 0) | |
1712 | return 0; | |
1713 | ||
3b627e8d TT |
1714 | if (rfs->progress) { |
1715 | retval = rfs->progress(rfs, E2_RSZ_MOVE_ITABLE_PASS, | |
1716 | 0, to_move); | |
1717 | if (retval) | |
1718 | goto errout; | |
1719 | } | |
63b44fbe | 1720 | |
a8519a2d TT |
1721 | rfs->old_fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; |
1722 | ||
1333fe93 | 1723 | for (i=0; i < max_groups; i++) { |
d7cca6b0 VAH |
1724 | old_blk = ext2fs_inode_table_loc(rfs->old_fs, i); |
1725 | new_blk = ext2fs_inode_table_loc(fs, i); | |
ca8abba7 | 1726 | diff = new_blk - old_blk; |
efc6f628 | 1727 | |
80c0fc34 | 1728 | #ifdef RESIZE2FS_DEBUG |
efc6f628 | 1729 | if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE) |
8728d506 | 1730 | printf("Itable move group %d block %llu->%llu (diff %lld)\n", |
ca8abba7 | 1731 | i, old_blk, new_blk, diff); |
80c0fc34 | 1732 | #endif |
efc6f628 | 1733 | |
05e112a1 | 1734 | if (!diff) |
052db4b7 TT |
1735 | continue; |
1736 | ||
24a117ab VAH |
1737 | retval = io_channel_read_blk64(fs->io, old_blk, |
1738 | fs->inode_blocks_per_group, | |
1739 | rfs->itable_buf); | |
efc6f628 | 1740 | if (retval) |
a8519a2d | 1741 | goto errout; |
05e112a1 TT |
1742 | /* |
1743 | * The end of the inode table segment often contains | |
a8519a2d TT |
1744 | * all zeros, and we're often only moving the inode |
1745 | * table down a block or two. If so, we can optimize | |
1746 | * things by not rewriting blocks that we know to be zero | |
1747 | * already. | |
05e112a1 | 1748 | */ |
2787276e | 1749 | for (cp = rfs->itable_buf+size-1, n=0; n < size; n++, cp--) |
05e112a1 TT |
1750 | if (*cp) |
1751 | break; | |
1752 | n = n >> EXT2_BLOCK_SIZE_BITS(fs->super); | |
80c0fc34 | 1753 | #ifdef RESIZE2FS_DEBUG |
efc6f628 | 1754 | if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE) |
f35fd3d5 | 1755 | printf("%d blocks of zeros...\n", n); |
80c0fc34 | 1756 | #endif |
05e112a1 TT |
1757 | num = fs->inode_blocks_per_group; |
1758 | if (n > diff) | |
1759 | num -= n; | |
1760 | ||
24a117ab VAH |
1761 | retval = io_channel_write_blk64(fs->io, new_blk, |
1762 | num, rfs->itable_buf); | |
052db4b7 | 1763 | if (retval) { |
24a117ab VAH |
1764 | io_channel_write_blk64(fs->io, old_blk, |
1765 | num, rfs->itable_buf); | |
a8519a2d | 1766 | goto errout; |
052db4b7 | 1767 | } |
05e112a1 | 1768 | if (n > diff) { |
24a117ab | 1769 | retval = io_channel_write_blk64(fs->io, |
ca8abba7 | 1770 | old_blk + fs->inode_blocks_per_group, |
a8519a2d TT |
1771 | diff, (rfs->itable_buf + |
1772 | (fs->inode_blocks_per_group - diff) * | |
1773 | fs->blocksize)); | |
05e112a1 | 1774 | if (retval) |
a8519a2d | 1775 | goto errout; |
c762c8e6 | 1776 | } |
64ad98ac | 1777 | |
d7cca6b0 | 1778 | for (blk = ext2fs_inode_table_loc(rfs->old_fs, i), j=0; |
64ad98ac | 1779 | j < fs->inode_blocks_per_group ; j++, blk++) |
48f23054 | 1780 | ext2fs_block_alloc_stats2(fs, blk, -1); |
64ad98ac | 1781 | |
d7cca6b0 | 1782 | ext2fs_inode_table_loc_set(rfs->old_fs, i, new_blk); |
236efede | 1783 | ext2fs_group_desc_csum_set(rfs->old_fs, i); |
a8519a2d | 1784 | ext2fs_mark_super_dirty(rfs->old_fs); |
64ad98ac TT |
1785 | ext2fs_flush(rfs->old_fs); |
1786 | ||
a8519a2d | 1787 | if (rfs->progress) { |
3b627e8d TT |
1788 | retval = rfs->progress(rfs, E2_RSZ_MOVE_ITABLE_PASS, |
1789 | ++moved, to_move); | |
1790 | if (retval) | |
1791 | goto errout; | |
a8519a2d | 1792 | } |
052db4b7 | 1793 | } |
64ad98ac | 1794 | mark_table_blocks(fs, fs->block_map); |
a8519a2d | 1795 | ext2fs_flush(fs); |
80c0fc34 | 1796 | #ifdef RESIZE2FS_DEBUG |
efc6f628 | 1797 | if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE) |
f35fd3d5 | 1798 | printf("Inode table move finished.\n"); |
80c0fc34 | 1799 | #endif |
052db4b7 | 1800 | return 0; |
efc6f628 | 1801 | |
a8519a2d | 1802 | errout: |
052db4b7 TT |
1803 | return retval; |
1804 | } | |
1805 | ||
9213a93b | 1806 | /* |
efc6f628 | 1807 | * Fix the resize inode |
9213a93b TT |
1808 | */ |
1809 | static errcode_t fix_resize_inode(ext2_filsys fs) | |
1810 | { | |
1811 | struct ext2_inode inode; | |
1812 | errcode_t retval; | |
5e27a274 | 1813 | char *block_buf = NULL; |
9213a93b | 1814 | |
efc6f628 | 1815 | if (!(fs->super->s_feature_compat & |
9213a93b TT |
1816 | EXT2_FEATURE_COMPAT_RESIZE_INODE)) |
1817 | return 0; | |
1818 | ||
1819 | retval = ext2fs_get_mem(fs->blocksize, &block_buf); | |
1820 | if (retval) goto errout; | |
1821 | ||
1822 | retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode); | |
1823 | if (retval) goto errout; | |
1824 | ||
1ca1059f | 1825 | ext2fs_iblk_set(fs, &inode, 1); |
9213a93b TT |
1826 | |
1827 | retval = ext2fs_write_inode(fs, EXT2_RESIZE_INO, &inode); | |
1828 | if (retval) goto errout; | |
1829 | ||
1830 | if (!inode.i_block[EXT2_DIND_BLOCK]) { | |
efc6f628 | 1831 | /* |
9213a93b TT |
1832 | * Avoid zeroing out block #0; that's rude. This |
1833 | * should never happen anyway since the filesystem | |
1834 | * should be fsck'ed and we assume it is consistent. | |
1835 | */ | |
efc6f628 | 1836 | fprintf(stderr, |
f35fd3d5 | 1837 | _("Should never happen: resize inode corrupt!\n")); |
9213a93b TT |
1838 | exit(1); |
1839 | } | |
1840 | ||
1841 | memset(block_buf, 0, fs->blocksize); | |
1842 | ||
24a117ab VAH |
1843 | retval = io_channel_write_blk64(fs->io, inode.i_block[EXT2_DIND_BLOCK], |
1844 | 1, block_buf); | |
9213a93b | 1845 | if (retval) goto errout; |
efc6f628 | 1846 | |
9213a93b TT |
1847 | retval = ext2fs_create_resize_inode(fs); |
1848 | if (retval) | |
1849 | goto errout; | |
1850 | ||
1851 | errout: | |
1852 | if (block_buf) | |
1853 | ext2fs_free_mem(&block_buf); | |
1854 | return retval; | |
1855 | } | |
1856 | ||
052db4b7 TT |
1857 | /* |
1858 | * Finally, recalculate the summary information | |
1859 | */ | |
1860 | static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs) | |
1861 | { | |
8728d506 | 1862 | blk64_t blk; |
dfcdc32f | 1863 | ext2_ino_t ino; |
54434927 TT |
1864 | unsigned int group = 0; |
1865 | unsigned int count = 0; | |
2279fd78 TT |
1866 | blk64_t total_blocks_free = 0; |
1867 | int total_inodes_free = 0; | |
dfcdc32f | 1868 | int group_free = 0; |
74128f8d | 1869 | int uninit = 0; |
8728d506 | 1870 | blk64_t super_blk, old_desc_blk, new_desc_blk; |
74128f8d | 1871 | int old_desc_blocks; |
052db4b7 TT |
1872 | |
1873 | /* | |
1874 | * First calculate the block statistics | |
1875 | */ | |
cd65a24e | 1876 | uninit = ext2fs_bg_flags_test(fs, group, EXT2_BG_BLOCK_UNINIT); |
8728d506 VAH |
1877 | ext2fs_super_and_bgd_loc2(fs, group, &super_blk, &old_desc_blk, |
1878 | &new_desc_blk, 0); | |
74128f8d TT |
1879 | if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) |
1880 | old_desc_blocks = fs->super->s_first_meta_bg; | |
1881 | else | |
1882 | old_desc_blocks = fs->desc_blocks + | |
1883 | fs->super->s_reserved_gdt_blocks; | |
1773c87c TT |
1884 | for (blk = B2C(fs->super->s_first_data_block); |
1885 | blk < ext2fs_blocks_count(fs->super); | |
1886 | blk += EXT2FS_CLUSTER_RATIO(fs)) { | |
74128f8d | 1887 | if ((uninit && |
1773c87c | 1888 | !(EQ_CLSTR(blk, super_blk) || |
74128f8d | 1889 | ((old_desc_blk && old_desc_blocks && |
1773c87c TT |
1890 | GE_CLSTR(blk, old_desc_blk) && |
1891 | LT_CLSTR(blk, old_desc_blk + old_desc_blocks))) || | |
1892 | ((new_desc_blk && EQ_CLSTR(blk, new_desc_blk))) || | |
1893 | EQ_CLSTR(blk, ext2fs_block_bitmap_loc(fs, group)) || | |
1894 | EQ_CLSTR(blk, ext2fs_inode_bitmap_loc(fs, group)) || | |
1895 | ((GE_CLSTR(blk, ext2fs_inode_table_loc(fs, group)) && | |
1896 | LT_CLSTR(blk, ext2fs_inode_table_loc(fs, group) | |
1897 | + fs->inode_blocks_per_group))))) || | |
3346084b | 1898 | (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk))) { |
052db4b7 | 1899 | group_free++; |
2279fd78 | 1900 | total_blocks_free++; |
052db4b7 TT |
1901 | } |
1902 | count++; | |
1773c87c TT |
1903 | if ((count == fs->super->s_clusters_per_group) || |
1904 | EQ_CLSTR(blk, ext2fs_blocks_count(fs->super)-1)) { | |
d7cca6b0 | 1905 | ext2fs_bg_free_blocks_count_set(fs, group, group_free); |
236efede JS |
1906 | ext2fs_group_desc_csum_set(fs, group); |
1907 | group++; | |
4828bbe9 TT |
1908 | if (group >= fs->group_desc_count) |
1909 | break; | |
052db4b7 TT |
1910 | count = 0; |
1911 | group_free = 0; | |
8728d506 VAH |
1912 | uninit = ext2fs_bg_flags_test(fs, group, EXT2_BG_BLOCK_UNINIT); |
1913 | ext2fs_super_and_bgd_loc2(fs, group, &super_blk, | |
1914 | &old_desc_blk, | |
1915 | &new_desc_blk, 0); | |
74128f8d TT |
1916 | if (fs->super->s_feature_incompat & |
1917 | EXT2_FEATURE_INCOMPAT_META_BG) | |
1918 | old_desc_blocks = fs->super->s_first_meta_bg; | |
1919 | else | |
1920 | old_desc_blocks = fs->desc_blocks + | |
1921 | fs->super->s_reserved_gdt_blocks; | |
052db4b7 TT |
1922 | } |
1923 | } | |
1773c87c | 1924 | total_blocks_free = C2B(total_blocks_free); |
2279fd78 | 1925 | ext2fs_free_blocks_count_set(fs->super, total_blocks_free); |
efc6f628 | 1926 | |
052db4b7 TT |
1927 | /* |
1928 | * Next, calculate the inode statistics | |
1929 | */ | |
1930 | group_free = 0; | |
052db4b7 TT |
1931 | count = 0; |
1932 | group = 0; | |
5830d6be ES |
1933 | |
1934 | /* Protect loop from wrap-around if s_inodes_count maxed */ | |
cd65a24e | 1935 | uninit = ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT); |
5830d6be | 1936 | for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) { |
74128f8d | 1937 | if (uninit || |
3346084b | 1938 | !ext2fs_fast_test_inode_bitmap2(fs->inode_map, ino)) { |
052db4b7 | 1939 | group_free++; |
2279fd78 | 1940 | total_inodes_free++; |
052db4b7 TT |
1941 | } |
1942 | count++; | |
1943 | if ((count == fs->super->s_inodes_per_group) || | |
1944 | (ino == fs->super->s_inodes_count)) { | |
d7cca6b0 | 1945 | ext2fs_bg_free_inodes_count_set(fs, group, group_free); |
236efede JS |
1946 | ext2fs_group_desc_csum_set(fs, group); |
1947 | group++; | |
4828bbe9 TT |
1948 | if (group >= fs->group_desc_count) |
1949 | break; | |
052db4b7 TT |
1950 | count = 0; |
1951 | group_free = 0; | |
cd65a24e | 1952 | uninit = ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT); |
052db4b7 TT |
1953 | } |
1954 | } | |
2279fd78 | 1955 | fs->super->s_free_inodes_count = total_inodes_free; |
052db4b7 TT |
1956 | ext2fs_mark_super_dirty(fs); |
1957 | return 0; | |
1958 | } | |
199ddaaa | 1959 | |
8a6ede8b ES |
1960 | /* |
1961 | * Journal may have been relocated; update the backup journal blocks | |
1962 | * in the superblock. | |
1963 | */ | |
1964 | static errcode_t fix_sb_journal_backup(ext2_filsys fs) | |
1965 | { | |
1966 | errcode_t retval; | |
1967 | struct ext2_inode inode; | |
1968 | ||
1969 | if (!(fs->super->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)) | |
1970 | return 0; | |
1971 | ||
d93d5bbf ES |
1972 | /* External journal? Nothing to do. */ |
1973 | if (fs->super->s_journal_dev && !fs->super->s_journal_inum) | |
1974 | return 0; | |
1975 | ||
8a6ede8b ES |
1976 | retval = ext2fs_read_inode(fs, fs->super->s_journal_inum, &inode); |
1977 | if (retval) | |
1978 | return retval; | |
1979 | memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4); | |
931b58e1 | 1980 | fs->super->s_jnl_blocks[15] = inode.i_size_high; |
8a6ede8b ES |
1981 | fs->super->s_jnl_blocks[16] = inode.i_size; |
1982 | fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS; | |
1983 | ext2fs_mark_super_dirty(fs); | |
1984 | return 0; | |
1985 | } | |
1986 | ||
7f820344 TT |
1987 | static int calc_group_overhead(ext2_filsys fs, blk64_t grp, |
1988 | int old_desc_blocks) | |
1989 | { | |
1990 | blk64_t super_blk, old_desc_blk, new_desc_blk; | |
1991 | int overhead; | |
1992 | ||
1993 | /* inode table blocks plus allocation bitmaps */ | |
1994 | overhead = fs->inode_blocks_per_group + 2; | |
1995 | ||
1996 | ext2fs_super_and_bgd_loc2(fs, grp, &super_blk, | |
1997 | &old_desc_blk, &new_desc_blk, 0); | |
1998 | if ((grp == 0) || super_blk) | |
1999 | overhead++; | |
2000 | if (old_desc_blk) | |
2001 | overhead += old_desc_blocks; | |
2002 | else if (new_desc_blk) | |
2003 | overhead++; | |
2004 | return overhead; | |
2005 | } | |
2006 | ||
2007 | ||
199ddaaa JB |
2008 | /* |
2009 | * calcluate the minimum number of blocks the given fs can be resized to | |
2010 | */ | |
8728d506 | 2011 | blk64_t calculate_minimum_resize_size(ext2_filsys fs) |
199ddaaa | 2012 | { |
8728d506 VAH |
2013 | ext2_ino_t inode_count; |
2014 | blk64_t blks_needed, groups, data_blocks; | |
2015 | blk64_t grp, data_needed, last_start; | |
2016 | blk64_t overhead = 0; | |
7f820344 | 2017 | int old_desc_blocks; |
2884d208 PT |
2018 | int extra_groups = 0; |
2019 | int flexbg_size = 1 << fs->super->s_log_groups_per_flex; | |
199ddaaa JB |
2020 | |
2021 | /* | |
2022 | * first figure out how many group descriptors we need to | |
2023 | * handle the number of inodes we have | |
2024 | */ | |
2025 | inode_count = fs->super->s_inodes_count - | |
2026 | fs->super->s_free_inodes_count; | |
2027 | blks_needed = ext2fs_div_ceil(inode_count, | |
2028 | fs->super->s_inodes_per_group) * | |
2029 | EXT2_BLOCKS_PER_GROUP(fs->super); | |
8728d506 VAH |
2030 | groups = ext2fs_div64_ceil(blks_needed, |
2031 | EXT2_BLOCKS_PER_GROUP(fs->super)); | |
199ddaaa JB |
2032 | |
2033 | /* | |
7f820344 | 2034 | * number of old-style block group descriptor blocks |
199ddaaa | 2035 | */ |
7f820344 TT |
2036 | if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) |
2037 | old_desc_blocks = fs->super->s_first_meta_bg; | |
2038 | else | |
2039 | old_desc_blocks = fs->desc_blocks + | |
2040 | fs->super->s_reserved_gdt_blocks; | |
199ddaaa JB |
2041 | |
2042 | /* calculate how many blocks are needed for data */ | |
4efbac6f VAH |
2043 | data_needed = ext2fs_blocks_count(fs->super) - |
2044 | ext2fs_free_blocks_count(fs->super); | |
199ddaaa | 2045 | |
7f820344 TT |
2046 | for (grp = 0; grp < fs->group_desc_count; grp++) |
2047 | data_needed -= calc_group_overhead(fs, grp, old_desc_blocks); | |
2048 | ||
2049 | /* | |
2050 | * For ext4 we need to allow for up to a flex_bg worth of | |
2051 | * inode tables of slack space so the resize operation can be | |
2052 | * guaranteed to finish. | |
2053 | */ | |
c09043f1 | 2054 | if (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_FLEX_BG) { |
c09043f1 | 2055 | extra_groups = flexbg_size - (groups & (flexbg_size - 1)); |
7f820344 | 2056 | data_needed += fs->inode_blocks_per_group * extra_groups; |
2884d208 | 2057 | extra_groups = groups % flexbg_size; |
c09043f1 TT |
2058 | } |
2059 | ||
199ddaaa JB |
2060 | /* |
2061 | * figure out how many data blocks we have given the number of groups | |
2062 | * we need for our inodes | |
2063 | */ | |
2064 | data_blocks = groups * EXT2_BLOCKS_PER_GROUP(fs->super); | |
2065 | last_start = 0; | |
2066 | for (grp = 0; grp < groups; grp++) { | |
7f820344 | 2067 | overhead = calc_group_overhead(fs, grp, old_desc_blocks); |
199ddaaa JB |
2068 | |
2069 | /* | |
2070 | * we want to keep track of how much data we can store in | |
2071 | * the groups leading up to the last group so we can determine | |
2072 | * how big the last group needs to be | |
2073 | */ | |
2074 | if (grp != (groups - 1)) | |
2075 | last_start += EXT2_BLOCKS_PER_GROUP(fs->super) - | |
2076 | overhead; | |
2077 | ||
2078 | data_blocks -= overhead; | |
2079 | } | |
2080 | ||
2081 | /* | |
2082 | * if we need more group descriptors in order to accomodate our data | |
2083 | * then we need to add them here | |
2084 | */ | |
2085 | while (data_needed > data_blocks) { | |
8728d506 VAH |
2086 | blk64_t remainder = data_needed - data_blocks; |
2087 | blk64_t extra_grps; | |
199ddaaa JB |
2088 | |
2089 | /* figure out how many more groups we need for the data */ | |
8728d506 VAH |
2090 | extra_grps = ext2fs_div64_ceil(remainder, |
2091 | EXT2_BLOCKS_PER_GROUP(fs->super)); | |
199ddaaa JB |
2092 | |
2093 | data_blocks += extra_grps * EXT2_BLOCKS_PER_GROUP(fs->super); | |
2094 | ||
2095 | /* ok we have to account for the last group */ | |
7f820344 | 2096 | overhead = calc_group_overhead(fs, groups-1, old_desc_blocks); |
199ddaaa JB |
2097 | last_start += EXT2_BLOCKS_PER_GROUP(fs->super) - overhead; |
2098 | ||
2099 | for (grp = groups; grp < groups+extra_grps; grp++) { | |
7f820344 TT |
2100 | overhead = calc_group_overhead(fs, grp, |
2101 | old_desc_blocks); | |
199ddaaa JB |
2102 | |
2103 | /* | |
2104 | * again, we need to see how much data we cram into | |
2105 | * all of the groups leading up to the last group | |
2106 | */ | |
2107 | if (grp != (groups + extra_grps - 1)) | |
2108 | last_start += EXT2_BLOCKS_PER_GROUP(fs->super) | |
2109 | - overhead; | |
2110 | ||
2111 | data_blocks -= overhead; | |
2112 | } | |
2113 | ||
2114 | groups += extra_grps; | |
2884d208 PT |
2115 | extra_groups += extra_grps; |
2116 | if (fs->super->s_feature_incompat | |
2117 | & EXT4_FEATURE_INCOMPAT_FLEX_BG | |
2118 | && extra_groups > flexbg_size) { | |
2119 | /* | |
2120 | * For ext4 we need to allow for up to a flex_bg worth | |
2121 | * of inode tables of slack space so the resize | |
2122 | * operation can be guaranteed to finish. | |
2123 | */ | |
2124 | extra_groups = flexbg_size - | |
2125 | (groups & (flexbg_size - 1)); | |
7f820344 TT |
2126 | data_needed += (fs->inode_blocks_per_group * |
2127 | extra_groups); | |
2884d208 PT |
2128 | extra_groups = groups % flexbg_size; |
2129 | } | |
199ddaaa JB |
2130 | } |
2131 | ||
2132 | /* now for the fun voodoo */ | |
7f820344 | 2133 | overhead = calc_group_overhead(fs, groups-1, old_desc_blocks); |
199ddaaa JB |
2134 | |
2135 | /* | |
2136 | * if this is the case then the last group is going to have data in it | |
2137 | * so we need to adjust the size of the last group accordingly | |
2138 | */ | |
2139 | if (last_start < data_needed) { | |
8728d506 | 2140 | blk64_t remainder = data_needed - last_start; |
199ddaaa JB |
2141 | |
2142 | /* | |
2143 | * 50 is a magic number that mkfs/resize uses to see if its | |
2144 | * even worth making/resizing the fs. basically you need to | |
2145 | * have at least 50 blocks in addition to the blocks needed | |
2146 | * for the metadata in the last group | |
2147 | */ | |
2148 | if (remainder > 50) | |
2149 | overhead += remainder; | |
2150 | else | |
2151 | overhead += 50; | |
2152 | } else | |
2153 | overhead += 50; | |
2154 | ||
ba8bfa1a | 2155 | overhead += fs->super->s_first_data_block; |
199ddaaa JB |
2156 | |
2157 | /* | |
2158 | * since our last group doesn't have to be BLOCKS_PER_GROUP large, we | |
2159 | * only do groups-1, and then add the number of blocks needed to | |
2160 | * handle the group descriptor metadata+data that we need | |
2161 | */ | |
2162 | blks_needed = (groups-1) * EXT2_BLOCKS_PER_GROUP(fs->super); | |
2163 | blks_needed += overhead; | |
2164 | ||
69f7c80e ES |
2165 | /* |
2166 | * If at this point we've already added up more "needed" than | |
2167 | * the current size, just return current size as minimum. | |
2168 | */ | |
4efbac6f VAH |
2169 | if (blks_needed >= ext2fs_blocks_count(fs->super)) |
2170 | return ext2fs_blocks_count(fs->super); | |
793a04a0 TT |
2171 | /* |
2172 | * We need to reserve a few extra blocks if extents are | |
2173 | * enabled, in case we need to grow the extent tree. The more | |
2174 | * we shrink the file system, the more space we need. | |
2175 | */ | |
2176 | if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) | |
4efbac6f VAH |
2177 | blks_needed += (ext2fs_blocks_count(fs->super) - |
2178 | blks_needed)/500; | |
793a04a0 | 2179 | |
199ddaaa JB |
2180 | return blks_needed; |
2181 | } |