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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 | ||
f404167d | 76 | static int lazy_itable_init; |
2d8c0c8a | 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, | |
0851517d DW |
276 | ext2_filsys old_fs, |
277 | dgrp_t group) | |
9227c5bb | 278 | { |
0851517d | 279 | blk64_t blk; |
9227c5bb TT |
280 | int j; |
281 | ||
0851517d DW |
282 | blk = ext2fs_block_bitmap_loc(old_fs, group); |
283 | if (blk && | |
284 | (blk < ext2fs_blocks_count(fs->super))) { | |
285 | ext2fs_block_alloc_stats2(fs, blk, -1); | |
286 | ext2fs_mark_block_bitmap2(reserve_blocks, blk); | |
c09043f1 | 287 | } |
9227c5bb | 288 | |
0851517d DW |
289 | blk = ext2fs_inode_bitmap_loc(old_fs, group); |
290 | if (blk && | |
291 | (blk < ext2fs_blocks_count(fs->super))) { | |
292 | ext2fs_block_alloc_stats2(fs, blk, -1); | |
293 | ext2fs_mark_block_bitmap2(reserve_blocks, blk); | |
c09043f1 | 294 | } |
9227c5bb | 295 | |
0851517d DW |
296 | blk = ext2fs_inode_table_loc(old_fs, group); |
297 | if (blk == 0 || | |
298 | (blk >= ext2fs_blocks_count(fs->super))) | |
9227c5bb TT |
299 | return; |
300 | ||
0851517d | 301 | for (j = 0; |
9227c5bb | 302 | j < fs->inode_blocks_per_group; j++, blk++) { |
4efbac6f | 303 | if (blk >= ext2fs_blocks_count(fs->super)) |
9227c5bb | 304 | break; |
0851517d | 305 | ext2fs_block_alloc_stats2(fs, blk, -1); |
3346084b | 306 | ext2fs_mark_block_bitmap2(reserve_blocks, blk); |
9227c5bb TT |
307 | } |
308 | } | |
309 | ||
24b2c7a7 | 310 | /* |
bf69235a TT |
311 | * This routine is shared by the online and offline resize routines. |
312 | * All of the information which is adjusted in memory is done here. | |
24b2c7a7 | 313 | */ |
c09043f1 | 314 | errcode_t adjust_fs_info(ext2_filsys fs, ext2_filsys old_fs, |
8728d506 | 315 | ext2fs_block_bitmap reserve_blocks, blk64_t new_size) |
24b2c7a7 | 316 | { |
24b2c7a7 | 317 | errcode_t retval; |
8728d506 VAH |
318 | blk64_t overhead = 0; |
319 | blk64_t rem; | |
320 | blk64_t blk, group_block; | |
2696f250 | 321 | blk64_t real_end; |
5e27a274 TT |
322 | blk64_t old_numblocks, numblocks, adjblocks; |
323 | unsigned long i, j, old_desc_blocks; | |
54434927 | 324 | unsigned int meta_bg, meta_bg_size; |
74128f8d | 325 | int has_super, csum_flag; |
de8f3a76 | 326 | unsigned long long new_inodes; /* u64 to check for overflow */ |
9ff8ece5 | 327 | double percent; |
bf69235a | 328 | |
4efbac6f | 329 | ext2fs_blocks_count_set(fs->super, new_size); |
24b2c7a7 TT |
330 | |
331 | retry: | |
4efbac6f | 332 | fs->group_desc_count = ext2fs_div64_ceil(ext2fs_blocks_count(fs->super) - |
69022e02 TT |
333 | fs->super->s_first_data_block, |
334 | EXT2_BLOCKS_PER_GROUP(fs->super)); | |
24b2c7a7 TT |
335 | if (fs->group_desc_count == 0) |
336 | return EXT2_ET_TOOSMALL; | |
efc6f628 | 337 | fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count, |
69022e02 | 338 | EXT2_DESC_PER_BLOCK(fs->super)); |
24b2c7a7 TT |
339 | |
340 | /* | |
341 | * Overhead is the number of bookkeeping blocks per group. It | |
342 | * includes the superblock backup, the group descriptor | |
343 | * backups, the inode bitmap, the block bitmap, and the inode | |
344 | * table. | |
24b2c7a7 | 345 | */ |
9213a93b TT |
346 | overhead = (int) (2 + fs->inode_blocks_per_group); |
347 | ||
348 | if (ext2fs_bg_has_super(fs, fs->group_desc_count - 1)) | |
efc6f628 | 349 | overhead += 1 + fs->desc_blocks + |
9213a93b TT |
350 | fs->super->s_reserved_gdt_blocks; |
351 | ||
24b2c7a7 TT |
352 | /* |
353 | * See if the last group is big enough to support the | |
354 | * necessary data structures. If not, we need to get rid of | |
355 | * it. | |
356 | */ | |
4efbac6f | 357 | rem = (ext2fs_blocks_count(fs->super) - fs->super->s_first_data_block) % |
24b2c7a7 TT |
358 | fs->super->s_blocks_per_group; |
359 | if ((fs->group_desc_count == 1) && rem && (rem < overhead)) | |
360 | return EXT2_ET_TOOSMALL; | |
515e555a | 361 | if ((fs->group_desc_count > 1) && rem && (rem < overhead+50)) { |
4efbac6f VAH |
362 | ext2fs_blocks_count_set(fs->super, |
363 | ext2fs_blocks_count(fs->super) - rem); | |
24b2c7a7 TT |
364 | goto retry; |
365 | } | |
366 | /* | |
367 | * Adjust the number of inodes | |
368 | */ | |
de8f3a76 | 369 | new_inodes =(unsigned long long) fs->super->s_inodes_per_group * fs->group_desc_count; |
f3358643 ES |
370 | if (new_inodes > ~0U) { |
371 | fprintf(stderr, _("inodes (%llu) must be less than %u"), | |
372 | new_inodes, ~0U); | |
373 | return EXT2_ET_TOO_MANY_INODES; | |
374 | } | |
24b2c7a7 TT |
375 | fs->super->s_inodes_count = fs->super->s_inodes_per_group * |
376 | fs->group_desc_count; | |
377 | ||
378 | /* | |
379 | * Adjust the number of free blocks | |
380 | */ | |
4efbac6f VAH |
381 | blk = ext2fs_blocks_count(old_fs->super); |
382 | if (blk > ext2fs_blocks_count(fs->super)) | |
383 | ext2fs_free_blocks_count_set(fs->super, | |
384 | ext2fs_free_blocks_count(fs->super) - | |
385 | (blk - ext2fs_blocks_count(fs->super))); | |
24b2c7a7 | 386 | else |
4efbac6f VAH |
387 | ext2fs_free_blocks_count_set(fs->super, |
388 | ext2fs_free_blocks_count(fs->super) + | |
389 | (ext2fs_blocks_count(fs->super) - blk)); | |
24b2c7a7 | 390 | |
c762c8e6 TT |
391 | /* |
392 | * Adjust the number of reserved blocks | |
393 | */ | |
4efbac6f VAH |
394 | percent = (ext2fs_r_blocks_count(old_fs->super) * 100.0) / |
395 | ext2fs_blocks_count(old_fs->super); | |
396 | ext2fs_r_blocks_count_set(fs->super, | |
397 | (percent * ext2fs_blocks_count(fs->super) / | |
398 | 100.0)); | |
c762c8e6 | 399 | |
24b2c7a7 TT |
400 | /* |
401 | * Adjust the bitmaps for size | |
402 | */ | |
3346084b | 403 | retval = ext2fs_resize_inode_bitmap2(fs->super->s_inodes_count, |
24b2c7a7 TT |
404 | fs->super->s_inodes_count, |
405 | fs->inode_map); | |
c762c8e6 | 406 | if (retval) goto errout; |
efc6f628 | 407 | |
2696f250 TT |
408 | real_end = (((blk64_t) EXT2_BLOCKS_PER_GROUP(fs->super) * |
409 | fs->group_desc_count)) - 1 + | |
410 | fs->super->s_first_data_block; | |
f026f1a3 TT |
411 | retval = ext2fs_resize_block_bitmap2(new_size - 1, |
412 | real_end, fs->block_map); | |
c762c8e6 | 413 | if (retval) goto errout; |
24b2c7a7 | 414 | |
f026f1a3 TT |
415 | /* |
416 | * If we are growing the file system, also grow the size of | |
417 | * the reserve_blocks bitmap | |
418 | */ | |
419 | if (reserve_blocks && new_size > ext2fs_blocks_count(old_fs->super)) { | |
420 | retval = ext2fs_resize_block_bitmap2(new_size - 1, | |
421 | real_end, reserve_blocks); | |
422 | if (retval) goto errout; | |
423 | } | |
424 | ||
24b2c7a7 TT |
425 | /* |
426 | * Reallocate the group descriptors as necessary. | |
427 | */ | |
bf69235a TT |
428 | if (old_fs->desc_blocks != fs->desc_blocks) { |
429 | retval = ext2fs_resize_mem(old_fs->desc_blocks * | |
76f875da TT |
430 | fs->blocksize, |
431 | fs->desc_blocks * fs->blocksize, | |
c4e3d3f3 | 432 | &fs->group_desc); |
ca8abba7 | 433 | if (retval) |
a8519a2d | 434 | goto errout; |
efc6f628 TT |
435 | if (fs->desc_blocks > old_fs->desc_blocks) |
436 | memset((char *) fs->group_desc + | |
bf69235a TT |
437 | (old_fs->desc_blocks * fs->blocksize), 0, |
438 | (fs->desc_blocks - old_fs->desc_blocks) * | |
2787276e | 439 | fs->blocksize); |
24b2c7a7 | 440 | } |
1e1da29f | 441 | |
9213a93b TT |
442 | /* |
443 | * If the resize_inode feature is set, and we are changing the | |
444 | * number of descriptor blocks, then adjust | |
445 | * s_reserved_gdt_blocks if possible to avoid needing to move | |
446 | * the inode table either now or in the future. | |
447 | */ | |
efc6f628 | 448 | if ((fs->super->s_feature_compat & |
9213a93b | 449 | EXT2_FEATURE_COMPAT_RESIZE_INODE) && |
bf69235a | 450 | (old_fs->desc_blocks != fs->desc_blocks)) { |
9213a93b TT |
451 | int new; |
452 | ||
efc6f628 | 453 | new = ((int) fs->super->s_reserved_gdt_blocks) + |
bf69235a | 454 | (old_fs->desc_blocks - fs->desc_blocks); |
9213a93b TT |
455 | if (new < 0) |
456 | new = 0; | |
de8f3a76 | 457 | if (new > (int) fs->blocksize/4) |
9213a93b TT |
458 | new = fs->blocksize/4; |
459 | fs->super->s_reserved_gdt_blocks = new; | |
9213a93b TT |
460 | } |
461 | ||
a8519a2d | 462 | /* |
c09043f1 TT |
463 | * If we are shrinking the number of block groups, we're done |
464 | * and can exit now. | |
1e1da29f | 465 | */ |
bf69235a | 466 | if (old_fs->group_desc_count > fs->group_desc_count) { |
9227c5bb TT |
467 | /* |
468 | * Check the block groups that we are chopping off | |
469 | * and free any blocks associated with their metadata | |
470 | */ | |
471 | for (i = fs->group_desc_count; | |
0851517d DW |
472 | i < old_fs->group_desc_count; i++) |
473 | free_gdp_blocks(fs, reserve_blocks, old_fs, i); | |
c762c8e6 TT |
474 | retval = 0; |
475 | goto errout; | |
476 | } | |
bf69235a | 477 | |
a8519a2d TT |
478 | /* |
479 | * Fix the count of the last (old) block group | |
480 | */ | |
4efbac6f | 481 | old_numblocks = (ext2fs_blocks_count(old_fs->super) - |
bf69235a TT |
482 | old_fs->super->s_first_data_block) % |
483 | old_fs->super->s_blocks_per_group; | |
1e1da29f | 484 | if (!old_numblocks) |
bf69235a TT |
485 | old_numblocks = old_fs->super->s_blocks_per_group; |
486 | if (old_fs->group_desc_count == fs->group_desc_count) { | |
4efbac6f | 487 | numblocks = (ext2fs_blocks_count(fs->super) - |
bf69235a TT |
488 | fs->super->s_first_data_block) % |
489 | fs->super->s_blocks_per_group; | |
1e1da29f | 490 | if (!numblocks) |
bf69235a | 491 | numblocks = fs->super->s_blocks_per_group; |
1e1da29f | 492 | } else |
bf69235a TT |
493 | numblocks = fs->super->s_blocks_per_group; |
494 | i = old_fs->group_desc_count - 1; | |
d7cca6b0 | 495 | ext2fs_bg_free_blocks_count_set(fs, i, ext2fs_bg_free_blocks_count(fs, i) + (numblocks - old_numblocks)); |
236efede JS |
496 | ext2fs_group_desc_csum_set(fs, i); |
497 | ||
1e1da29f | 498 | /* |
a8519a2d TT |
499 | * If the number of block groups is staying the same, we're |
500 | * done and can exit now. (If the number block groups is | |
501 | * shrinking, we had exited earlier.) | |
1e1da29f | 502 | */ |
bf69235a | 503 | if (old_fs->group_desc_count >= fs->group_desc_count) { |
c762c8e6 TT |
504 | retval = 0; |
505 | goto errout; | |
506 | } | |
bf69235a | 507 | |
a8519a2d TT |
508 | /* |
509 | * Initialize the new block group descriptors | |
510 | */ | |
027b0577 TT |
511 | group_block = ext2fs_group_first_block2(fs, |
512 | old_fs->group_desc_count); | |
74128f8d TT |
513 | csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super, |
514 | EXT4_FEATURE_RO_COMPAT_GDT_CSUM); | |
2d8c0c8a TT |
515 | if (access("/sys/fs/ext4/features/lazy_itable_init", F_OK) == 0) |
516 | lazy_itable_init = 1; | |
76dd5e5c TT |
517 | if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) |
518 | old_desc_blocks = fs->super->s_first_meta_bg; | |
519 | else | |
efc6f628 | 520 | old_desc_blocks = fs->desc_blocks + |
9213a93b | 521 | fs->super->s_reserved_gdt_blocks; |
f026f1a3 TT |
522 | |
523 | /* | |
524 | * If we changed the number of block_group descriptor blocks, | |
525 | * we need to make sure they are all marked as reserved in the | |
526 | * file systems's block allocation map. | |
527 | */ | |
528 | for (i = 0; i < old_fs->group_desc_count; i++) | |
529 | ext2fs_reserve_super_and_bgd(fs, i, fs->block_map); | |
530 | ||
bf69235a | 531 | for (i = old_fs->group_desc_count; |
1e1da29f | 532 | i < fs->group_desc_count; i++) { |
d7cca6b0 | 533 | memset(ext2fs_group_desc(fs, fs->group_desc, i), 0, |
1e1da29f TT |
534 | sizeof(struct ext2_group_desc)); |
535 | adjblocks = 0; | |
536 | ||
e633b58a | 537 | ext2fs_bg_flags_zap(fs, i); |
2d8c0c8a TT |
538 | if (csum_flag) { |
539 | ext2fs_bg_flags_set(fs, i, EXT2_BG_INODE_UNINIT); | |
540 | if (!lazy_itable_init) | |
541 | ext2fs_bg_flags_set(fs, i, | |
542 | EXT2_BG_INODE_ZEROED); | |
543 | ext2fs_bg_itable_unused_set(fs, i, | |
544 | fs->super->s_inodes_per_group); | |
545 | } | |
98f45471 ES |
546 | |
547 | numblocks = ext2fs_group_blocks_count(fs, i); | |
548 | if ((i < fs->group_desc_count - 1) && csum_flag) | |
549 | ext2fs_bg_flags_set(fs, i, EXT2_BG_BLOCK_UNINIT); | |
1e1da29f | 550 | |
76dd5e5c TT |
551 | has_super = ext2fs_bg_has_super(fs, i); |
552 | if (has_super) { | |
48f23054 | 553 | ext2fs_block_alloc_stats2(fs, group_block, +1); |
76dd5e5c TT |
554 | adjblocks++; |
555 | } | |
f2de1d38 | 556 | meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super); |
76dd5e5c TT |
557 | meta_bg = i / meta_bg_size; |
558 | if (!(fs->super->s_feature_incompat & | |
559 | EXT2_FEATURE_INCOMPAT_META_BG) || | |
560 | (meta_bg < fs->super->s_first_meta_bg)) { | |
561 | if (has_super) { | |
562 | for (j=0; j < old_desc_blocks; j++) | |
48f23054 | 563 | ext2fs_block_alloc_stats2(fs, |
74128f8d | 564 | group_block + 1 + j, +1); |
76dd5e5c TT |
565 | adjblocks += old_desc_blocks; |
566 | } | |
567 | } else { | |
568 | if (has_super) | |
569 | has_super = 1; | |
570 | if (((i % meta_bg_size) == 0) || | |
571 | ((i % meta_bg_size) == 1) || | |
572 | ((i % meta_bg_size) == (meta_bg_size-1))) | |
48f23054 | 573 | ext2fs_block_alloc_stats2(fs, |
74128f8d | 574 | group_block + has_super, +1); |
24b2c7a7 | 575 | } |
efc6f628 | 576 | |
1e1da29f | 577 | adjblocks += 2 + fs->inode_blocks_per_group; |
efc6f628 | 578 | |
1e1da29f | 579 | numblocks -= adjblocks; |
4efbac6f VAH |
580 | ext2fs_free_blocks_count_set(fs->super, |
581 | ext2fs_free_blocks_count(fs->super) - adjblocks); | |
1e1da29f TT |
582 | fs->super->s_free_inodes_count += |
583 | fs->super->s_inodes_per_group; | |
d7cca6b0 VAH |
584 | ext2fs_bg_free_blocks_count_set(fs, i, numblocks); |
585 | ext2fs_bg_free_inodes_count_set(fs, i, | |
586 | fs->super->s_inodes_per_group); | |
587 | ext2fs_bg_used_dirs_count_set(fs, i, 0); | |
236efede | 588 | ext2fs_group_desc_csum_set(fs, i); |
24b2c7a7 | 589 | |
1e1da29f | 590 | retval = ext2fs_allocate_group_table(fs, i, 0); |
c762c8e6 | 591 | if (retval) goto errout; |
24b2c7a7 | 592 | |
bf69235a TT |
593 | group_block += fs->super->s_blocks_per_group; |
594 | } | |
595 | retval = 0; | |
596 | ||
f026f1a3 TT |
597 | /* |
598 | * Mark all of the metadata blocks as reserved so they won't | |
599 | * get allocated by the call to ext2fs_allocate_group_table() | |
600 | * in blocks_to_move(), where we allocate new blocks to | |
601 | * replace those allocation bitmap and inode table blocks | |
602 | * which have to get relocated to make space for an increased | |
603 | * number of the block group descriptors. | |
604 | */ | |
605 | if (reserve_blocks) | |
606 | mark_table_blocks(fs, reserve_blocks); | |
607 | ||
bf69235a TT |
608 | errout: |
609 | return (retval); | |
610 | } | |
611 | ||
612 | /* | |
613 | * This routine adjusts the superblock and other data structures, both | |
614 | * in disk as well as in memory... | |
615 | */ | |
8728d506 | 616 | static errcode_t adjust_superblock(ext2_resize_t rfs, blk64_t new_size) |
bf69235a TT |
617 | { |
618 | ext2_filsys fs; | |
619 | int adj = 0; | |
620 | errcode_t retval; | |
8728d506 | 621 | blk64_t group_block; |
bf69235a TT |
622 | unsigned long i; |
623 | unsigned long max_group; | |
efc6f628 | 624 | |
bf69235a TT |
625 | fs = rfs->new_fs; |
626 | ext2fs_mark_super_dirty(fs); | |
627 | ext2fs_mark_bb_dirty(fs); | |
628 | ext2fs_mark_ib_dirty(fs); | |
629 | ||
c09043f1 TT |
630 | retval = ext2fs_allocate_block_bitmap(fs, _("reserved blocks"), |
631 | &rfs->reserve_blocks); | |
632 | if (retval) | |
633 | return retval; | |
634 | ||
635 | retval = adjust_fs_info(fs, rfs->old_fs, rfs->reserve_blocks, new_size); | |
bf69235a TT |
636 | if (retval) |
637 | goto errout; | |
638 | ||
639 | /* | |
640 | * Check to make sure there are enough inodes | |
641 | */ | |
642 | if ((rfs->old_fs->super->s_inodes_count - | |
643 | rfs->old_fs->super->s_free_inodes_count) > | |
644 | rfs->new_fs->super->s_inodes_count) { | |
645 | retval = ENOSPC; | |
646 | goto errout; | |
647 | } | |
648 | ||
649 | /* | |
650 | * If we are shrinking the number block groups, we're done and | |
651 | * can exit now. | |
652 | */ | |
653 | if (rfs->old_fs->group_desc_count > fs->group_desc_count) { | |
654 | retval = 0; | |
655 | goto errout; | |
656 | } | |
657 | ||
658 | /* | |
659 | * If the number of block groups is staying the same, we're | |
660 | * done and can exit now. (If the number block groups is | |
661 | * shrinking, we had exited earlier.) | |
662 | */ | |
663 | if (rfs->old_fs->group_desc_count >= fs->group_desc_count) { | |
664 | retval = 0; | |
665 | goto errout; | |
666 | } | |
667 | ||
668 | /* | |
2d8c0c8a TT |
669 | * If we are using uninit_bg (aka GDT_CSUM) and the kernel |
670 | * supports lazy inode initialization, we can skip | |
671 | * initializing the inode table. | |
672 | */ | |
673 | if (lazy_itable_init && | |
674 | EXT2_HAS_RO_COMPAT_FEATURE(fs->super, | |
675 | EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
676 | retval = 0; | |
677 | goto errout; | |
678 | } | |
679 | ||
680 | /* | |
681 | * Initialize the inode table | |
bf69235a | 682 | */ |
e5aace90 | 683 | retval = ext2fs_get_array(fs->blocksize, fs->inode_blocks_per_group, |
bf69235a TT |
684 | &rfs->itable_buf); |
685 | if (retval) | |
686 | goto errout; | |
687 | ||
688 | memset(rfs->itable_buf, 0, fs->blocksize * fs->inode_blocks_per_group); | |
027b0577 TT |
689 | group_block = ext2fs_group_first_block2(fs, |
690 | rfs->old_fs->group_desc_count); | |
bf69235a TT |
691 | adj = rfs->old_fs->group_desc_count; |
692 | max_group = fs->group_desc_count - adj; | |
693 | if (rfs->progress) { | |
694 | retval = rfs->progress(rfs, E2_RSZ_EXTEND_ITABLE_PASS, | |
695 | 0, max_group); | |
696 | if (retval) | |
697 | goto errout; | |
698 | } | |
699 | for (i = rfs->old_fs->group_desc_count; | |
700 | i < fs->group_desc_count; i++) { | |
05e112a1 TT |
701 | /* |
702 | * Write out the new inode table | |
703 | */ | |
24a117ab | 704 | retval = io_channel_write_blk64(fs->io, |
d7cca6b0 | 705 | ext2fs_inode_table_loc(fs, i), |
24a117ab VAH |
706 | fs->inode_blocks_per_group, |
707 | rfs->itable_buf); | |
c762c8e6 TT |
708 | if (retval) goto errout; |
709 | ||
a8519a2d | 710 | io_channel_flush(fs->io); |
3b627e8d TT |
711 | if (rfs->progress) { |
712 | retval = rfs->progress(rfs, E2_RSZ_EXTEND_ITABLE_PASS, | |
713 | i - adj + 1, max_group); | |
714 | if (retval) | |
715 | goto errout; | |
716 | } | |
1e1da29f | 717 | group_block += fs->super->s_blocks_per_group; |
24b2c7a7 | 718 | } |
c762c8e6 TT |
719 | io_channel_flush(fs->io); |
720 | retval = 0; | |
721 | ||
722 | errout: | |
c762c8e6 TT |
723 | return retval; |
724 | } | |
725 | ||
a8519a2d TT |
726 | /* -------------------------------------------------------------------- |
727 | * | |
728 | * Resize processing, phase 2. | |
729 | * | |
730 | * In this phase we adjust determine which blocks need to be moved, in | |
731 | * blocks_to_move(). We then copy the blocks to their ultimate new | |
732 | * destinations using block_mover(). Since we are copying blocks to | |
733 | * their new locations, again during this pass we can abort without | |
734 | * any problems. | |
735 | * -------------------------------------------------------------------- | |
736 | */ | |
737 | ||
c762c8e6 TT |
738 | /* |
739 | * This helper function creates a block bitmap with all of the | |
740 | * filesystem meta-data blocks. | |
741 | */ | |
742 | static errcode_t mark_table_blocks(ext2_filsys fs, | |
64ad98ac | 743 | ext2fs_block_bitmap bmap) |
c762c8e6 | 744 | { |
54434927 | 745 | dgrp_t i; |
f026f1a3 | 746 | blk64_t blk; |
c762c8e6 | 747 | |
c762c8e6 | 748 | for (i = 0; i < fs->group_desc_count; i++) { |
64ad98ac | 749 | ext2fs_reserve_super_and_bgd(fs, i, bmap); |
efc6f628 | 750 | |
c762c8e6 TT |
751 | /* |
752 | * Mark the blocks used for the inode table | |
753 | */ | |
f026f1a3 TT |
754 | blk = ext2fs_inode_table_loc(fs, i); |
755 | if (blk) | |
756 | ext2fs_mark_block_bitmap_range2(bmap, blk, | |
757 | fs->inode_blocks_per_group); | |
efc6f628 | 758 | |
c762c8e6 | 759 | /* |
efc6f628 | 760 | * Mark block used for the block bitmap |
c762c8e6 | 761 | */ |
f026f1a3 TT |
762 | blk = ext2fs_block_bitmap_loc(fs, i); |
763 | if (blk) | |
764 | ext2fs_mark_block_bitmap2(bmap, blk); | |
64ad98ac | 765 | |
c762c8e6 | 766 | /* |
efc6f628 | 767 | * Mark block used for the inode bitmap |
c762c8e6 | 768 | */ |
f026f1a3 TT |
769 | blk = ext2fs_inode_bitmap_loc(fs, i); |
770 | if (blk) | |
771 | ext2fs_mark_block_bitmap2(bmap, blk); | |
c762c8e6 | 772 | } |
1e1da29f | 773 | return 0; |
24b2c7a7 TT |
774 | } |
775 | ||
76dd5e5c TT |
776 | /* |
777 | * This function checks to see if a particular block (either a | |
778 | * superblock or a block group descriptor) overlaps with an inode or | |
779 | * block bitmap block, or with the inode table. | |
780 | */ | |
781 | static void mark_fs_metablock(ext2_resize_t rfs, | |
782 | ext2fs_block_bitmap meta_bmap, | |
8728d506 | 783 | int group, blk64_t blk) |
76dd5e5c TT |
784 | { |
785 | ext2_filsys fs = rfs->new_fs; | |
efc6f628 | 786 | |
3346084b | 787 | ext2fs_mark_block_bitmap2(rfs->reserve_blocks, blk); |
48f23054 | 788 | ext2fs_block_alloc_stats2(fs, blk, +1); |
76dd5e5c TT |
789 | |
790 | /* | |
791 | * Check to see if we overlap with the inode or block bitmap, | |
792 | * or the inode tables. If not, and the block is in use, then | |
793 | * mark it as a block to be moved. | |
794 | */ | |
795 | if (IS_BLOCK_BM(fs, group, blk)) { | |
d7cca6b0 | 796 | ext2fs_block_bitmap_loc_set(fs, group, 0); |
76dd5e5c | 797 | rfs->needed_blocks++; |
ddcf1dbf TT |
798 | return; |
799 | } | |
800 | if (IS_INODE_BM(fs, group, blk)) { | |
d7cca6b0 | 801 | ext2fs_inode_bitmap_loc_set(fs, group, 0); |
76dd5e5c | 802 | rfs->needed_blocks++; |
ddcf1dbf TT |
803 | return; |
804 | } | |
805 | if (IS_INODE_TB(fs, group, blk)) { | |
d7cca6b0 | 806 | ext2fs_inode_table_loc_set(fs, group, 0); |
76dd5e5c | 807 | rfs->needed_blocks++; |
ddcf1dbf TT |
808 | return; |
809 | } | |
810 | if (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_FLEX_BG) { | |
811 | dgrp_t i; | |
812 | ||
813 | for (i=0; i < rfs->old_fs->group_desc_count; i++) { | |
814 | if (IS_BLOCK_BM(fs, i, blk)) { | |
815 | ext2fs_block_bitmap_loc_set(fs, i, 0); | |
816 | rfs->needed_blocks++; | |
817 | return; | |
818 | } | |
819 | if (IS_INODE_BM(fs, i, blk)) { | |
820 | ext2fs_inode_bitmap_loc_set(fs, i, 0); | |
821 | rfs->needed_blocks++; | |
822 | return; | |
823 | } | |
824 | if (IS_INODE_TB(fs, i, blk)) { | |
825 | ext2fs_inode_table_loc_set(fs, i, 0); | |
826 | rfs->needed_blocks++; | |
827 | return; | |
828 | } | |
829 | } | |
830 | } | |
831 | if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super, | |
832 | EXT4_FEATURE_RO_COMPAT_GDT_CSUM) && | |
cd65a24e | 833 | (ext2fs_bg_flags_test(fs, group, EXT2_BG_BLOCK_UNINIT))) { |
86acdebd TT |
834 | /* |
835 | * If the block bitmap is uninitialized, which means | |
836 | * nothing other than standard metadata in use. | |
837 | */ | |
838 | return; | |
3346084b VAH |
839 | } else if (ext2fs_test_block_bitmap2(rfs->old_fs->block_map, blk) && |
840 | !ext2fs_test_block_bitmap2(meta_bmap, blk)) { | |
841 | ext2fs_mark_block_bitmap2(rfs->move_blocks, blk); | |
76dd5e5c TT |
842 | rfs->needed_blocks++; |
843 | } | |
844 | } | |
845 | ||
846 | ||
24b2c7a7 TT |
847 | /* |
848 | * This routine marks and unmarks reserved blocks in the new block | |
849 | * bitmap. It also determines which blocks need to be moved and | |
850 | * places this information into the move_blocks bitmap. | |
851 | */ | |
c762c8e6 | 852 | static errcode_t blocks_to_move(ext2_resize_t rfs) |
24b2c7a7 | 853 | { |
54434927 | 854 | int j, has_super; |
86acdebd | 855 | dgrp_t i, max_groups, g; |
8728d506 VAH |
856 | blk64_t blk, group_blk; |
857 | blk64_t old_blocks, new_blocks; | |
80391dcd | 858 | blk64_t new_size; |
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 | |
80391dcd | 886 | /* |
e9736a3b TT |
887 | * If we're shrinking the filesystem, we need to move any |
888 | * group's metadata blocks (either allocation bitmaps or the | |
889 | * inode table) which are beyond the end of the new | |
890 | * filesystem. | |
80391dcd ES |
891 | */ |
892 | new_size = ext2fs_blocks_count(fs->super); | |
893 | if (new_size < ext2fs_blocks_count(old_fs->super)) { | |
894 | for (g = 0; g < fs->group_desc_count; g++) { | |
e9736a3b | 895 | int realloc = 0; |
80391dcd | 896 | /* |
e9736a3b TT |
897 | * ext2fs_allocate_group_table will re-allocate any |
898 | * metadata blocks whose location is set to zero. | |
80391dcd ES |
899 | */ |
900 | if (ext2fs_block_bitmap_loc(fs, g) >= new_size) { | |
901 | ext2fs_block_bitmap_loc_set(fs, g, 0); | |
e9736a3b | 902 | realloc = 1; |
80391dcd ES |
903 | } |
904 | if (ext2fs_inode_bitmap_loc(fs, g) >= new_size) { | |
905 | ext2fs_inode_bitmap_loc_set(fs, g, 0); | |
e9736a3b TT |
906 | realloc = 1; |
907 | } | |
908 | if ((ext2fs_inode_table_loc(fs, g) + | |
909 | fs->inode_blocks_per_group) > new_size) { | |
910 | ext2fs_inode_table_loc_set(fs, g, 0); | |
911 | realloc = 1; | |
912 | } | |
913 | ||
914 | if (realloc) { | |
80391dcd ES |
915 | retval = ext2fs_allocate_group_table(fs, g, 0); |
916 | if (retval) | |
917 | return retval; | |
918 | } | |
919 | } | |
920 | } | |
921 | ||
1e1da29f TT |
922 | /* |
923 | * If we're shrinking the filesystem, we need to move all of | |
924 | * the blocks that don't fit any more | |
925 | */ | |
4efbac6f VAH |
926 | for (blk = ext2fs_blocks_count(fs->super); |
927 | blk < ext2fs_blocks_count(old_fs->super); blk++) { | |
6493f8e8 | 928 | g = ext2fs_group_of_blk2(fs, blk); |
86acdebd TT |
929 | if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super, |
930 | EXT4_FEATURE_RO_COMPAT_GDT_CSUM) && | |
cd65a24e | 931 | ext2fs_bg_flags_test(old_fs, g, EXT2_BG_BLOCK_UNINIT)) { |
86acdebd TT |
932 | /* |
933 | * The block bitmap is uninitialized, so skip | |
934 | * to the next block group. | |
935 | */ | |
5d3a88fb | 936 | blk = ext2fs_group_first_block2(fs, g+1) - 1; |
86acdebd TT |
937 | continue; |
938 | } | |
3346084b VAH |
939 | if (ext2fs_test_block_bitmap2(old_fs->block_map, blk) && |
940 | !ext2fs_test_block_bitmap2(meta_bmap, blk)) { | |
941 | ext2fs_mark_block_bitmap2(rfs->move_blocks, blk); | |
1e1da29f | 942 | rfs->needed_blocks++; |
c762c8e6 | 943 | } |
3346084b | 944 | ext2fs_mark_block_bitmap2(rfs->reserve_blocks, blk); |
1e1da29f | 945 | } |
efc6f628 | 946 | |
76dd5e5c TT |
947 | if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) { |
948 | old_blocks = old_fs->super->s_first_meta_bg; | |
949 | new_blocks = fs->super->s_first_meta_bg; | |
950 | } else { | |
9213a93b TT |
951 | old_blocks = old_fs->desc_blocks + old_fs->super->s_reserved_gdt_blocks; |
952 | new_blocks = fs->desc_blocks + fs->super->s_reserved_gdt_blocks; | |
76dd5e5c | 953 | } |
efc6f628 | 954 | |
c762c8e6 TT |
955 | if (old_blocks == new_blocks) { |
956 | retval = 0; | |
957 | goto errout; | |
958 | } | |
24b2c7a7 | 959 | |
1333fe93 TT |
960 | max_groups = fs->group_desc_count; |
961 | if (max_groups > old_fs->group_desc_count) | |
962 | max_groups = old_fs->group_desc_count; | |
c762c8e6 | 963 | group_blk = old_fs->super->s_first_data_block; |
24b2c7a7 TT |
964 | /* |
965 | * If we're reducing the number of descriptor blocks, this | |
966 | * makes life easy. :-) We just have to mark some extra | |
967 | * blocks as free. | |
968 | */ | |
969 | if (old_blocks > new_blocks) { | |
1333fe93 | 970 | for (i = 0; i < max_groups; i++) { |
1e1da29f TT |
971 | if (!ext2fs_bg_has_super(fs, i)) { |
972 | group_blk += fs->super->s_blocks_per_group; | |
24b2c7a7 TT |
973 | continue; |
974 | } | |
c762c8e6 TT |
975 | for (blk = group_blk+1+new_blocks; |
976 | blk < group_blk+1+old_blocks; blk++) { | |
48f23054 | 977 | ext2fs_block_alloc_stats2(fs, blk, -1); |
052db4b7 TT |
978 | rfs->needed_blocks--; |
979 | } | |
1e1da29f | 980 | group_blk += fs->super->s_blocks_per_group; |
24b2c7a7 | 981 | } |
c762c8e6 TT |
982 | retval = 0; |
983 | goto errout; | |
24b2c7a7 TT |
984 | } |
985 | /* | |
986 | * If we're increasing the number of descriptor blocks, life | |
efc6f628 | 987 | * gets interesting.... |
24b2c7a7 | 988 | */ |
f2de1d38 | 989 | meta_bg_size = EXT2_DESC_PER_BLOCK(fs->super); |
4b04fb30 TT |
990 | flex_bg = fs->super->s_feature_incompat & |
991 | EXT4_FEATURE_INCOMPAT_FLEX_BG; | |
2ebaeb35 | 992 | /* first reserve all of the existing fs meta blocks */ |
1333fe93 | 993 | for (i = 0; i < max_groups; i++) { |
76dd5e5c TT |
994 | has_super = ext2fs_bg_has_super(fs, i); |
995 | if (has_super) | |
996 | mark_fs_metablock(rfs, meta_bmap, i, group_blk); | |
997 | ||
998 | meta_bg = i / meta_bg_size; | |
999 | if (!(fs->super->s_feature_incompat & | |
1000 | EXT2_FEATURE_INCOMPAT_META_BG) || | |
1001 | (meta_bg < fs->super->s_first_meta_bg)) { | |
424cb7b6 TT |
1002 | if (has_super) { |
1003 | for (blk = group_blk+1; | |
1004 | blk < group_blk + 1 + new_blocks; blk++) | |
efc6f628 | 1005 | mark_fs_metablock(rfs, meta_bmap, |
424cb7b6 TT |
1006 | i, blk); |
1007 | } | |
76dd5e5c TT |
1008 | } else { |
1009 | if (has_super) | |
1010 | has_super = 1; | |
1011 | if (((i % meta_bg_size) == 0) || | |
1012 | ((i % meta_bg_size) == 1) || | |
1013 | ((i % meta_bg_size) == (meta_bg_size-1))) | |
1014 | mark_fs_metablock(rfs, meta_bmap, i, | |
1015 | group_blk + has_super); | |
24b2c7a7 | 1016 | } |
76dd5e5c | 1017 | |
1e1da29f | 1018 | /* |
c762c8e6 TT |
1019 | * Reserve the existing meta blocks that we know |
1020 | * aren't to be moved. | |
4b04fb30 TT |
1021 | * |
1022 | * For flex_bg file systems, in order to avoid | |
1023 | * overwriting fs metadata (especially inode table | |
1024 | * blocks) belonging to a different block group when | |
1025 | * we are relocating the inode tables, we need to | |
1026 | * reserve all existing fs metadata blocks. | |
1e1da29f | 1027 | */ |
d7cca6b0 | 1028 | if (ext2fs_block_bitmap_loc(fs, i)) |
3346084b | 1029 | ext2fs_mark_block_bitmap2(rfs->reserve_blocks, |
d7cca6b0 | 1030 | ext2fs_block_bitmap_loc(fs, i)); |
4b04fb30 TT |
1031 | else if (flex_bg && i < old_fs->group_desc_count) |
1032 | ext2fs_mark_block_bitmap2(rfs->reserve_blocks, | |
1033 | ext2fs_block_bitmap_loc(old_fs, i)); | |
1034 | ||
d7cca6b0 | 1035 | if (ext2fs_inode_bitmap_loc(fs, i)) |
3346084b | 1036 | ext2fs_mark_block_bitmap2(rfs->reserve_blocks, |
d7cca6b0 | 1037 | ext2fs_inode_bitmap_loc(fs, i)); |
4b04fb30 TT |
1038 | else if (flex_bg && i < old_fs->group_desc_count) |
1039 | ext2fs_mark_block_bitmap2(rfs->reserve_blocks, | |
1040 | ext2fs_inode_bitmap_loc(old_fs, i)); | |
1041 | ||
d7cca6b0 | 1042 | if (ext2fs_inode_table_loc(fs, i)) |
a0ba54ec TT |
1043 | ext2fs_mark_block_bitmap_range2(rfs->reserve_blocks, |
1044 | ext2fs_inode_table_loc(fs, i), | |
1045 | fs->inode_blocks_per_group); | |
4b04fb30 | 1046 | else if (flex_bg && i < old_fs->group_desc_count) |
a0ba54ec TT |
1047 | ext2fs_mark_block_bitmap_range2(rfs->reserve_blocks, |
1048 | ext2fs_inode_table_loc(old_fs, i), | |
1049 | old_fs->inode_blocks_per_group); | |
24b2c7a7 | 1050 | |
2ebaeb35 TT |
1051 | group_blk += rfs->new_fs->super->s_blocks_per_group; |
1052 | } | |
1053 | ||
1054 | /* Allocate the missing data structures */ | |
1055 | for (i = 0; i < max_groups; i++) { | |
1056 | if (ext2fs_inode_table_loc(fs, i) && | |
1057 | ext2fs_inode_bitmap_loc(fs, i) && | |
1058 | ext2fs_block_bitmap_loc(fs, i)) | |
1059 | continue; | |
1060 | ||
1e1da29f TT |
1061 | retval = ext2fs_allocate_group_table(fs, i, |
1062 | rfs->reserve_blocks); | |
1063 | if (retval) | |
c762c8e6 | 1064 | goto errout; |
24b2c7a7 | 1065 | |
1e1da29f | 1066 | /* |
c762c8e6 TT |
1067 | * For those structures that have changed, we need to |
1068 | * do bookkeepping. | |
1e1da29f | 1069 | */ |
d7cca6b0 VAH |
1070 | if (ext2fs_block_bitmap_loc(old_fs, i) != |
1071 | (blk = ext2fs_block_bitmap_loc(fs, i))) { | |
48f23054 | 1072 | ext2fs_block_alloc_stats2(fs, blk, +1); |
3346084b VAH |
1073 | if (ext2fs_test_block_bitmap2(old_fs->block_map, blk) && |
1074 | !ext2fs_test_block_bitmap2(meta_bmap, blk)) | |
1075 | ext2fs_mark_block_bitmap2(rfs->move_blocks, | |
c762c8e6 TT |
1076 | blk); |
1077 | } | |
d7cca6b0 VAH |
1078 | if (ext2fs_inode_bitmap_loc(old_fs, i) != |
1079 | (blk = ext2fs_inode_bitmap_loc(fs, i))) { | |
48f23054 | 1080 | ext2fs_block_alloc_stats2(fs, blk, +1); |
3346084b VAH |
1081 | if (ext2fs_test_block_bitmap2(old_fs->block_map, blk) && |
1082 | !ext2fs_test_block_bitmap2(meta_bmap, blk)) | |
1083 | ext2fs_mark_block_bitmap2(rfs->move_blocks, | |
c762c8e6 TT |
1084 | blk); |
1085 | } | |
24b2c7a7 | 1086 | |
052db4b7 TT |
1087 | /* |
1088 | * The inode table, if we need to relocate it, is | |
1089 | * handled specially. We have to reserve the blocks | |
1090 | * for both the old and the new inode table, since we | |
1091 | * can't have the inode table be destroyed during the | |
1092 | * block relocation phase. | |
1093 | */ | |
d7cca6b0 | 1094 | if (ext2fs_inode_table_loc(fs, i) == ext2fs_inode_table_loc(old_fs, i)) |
2ebaeb35 | 1095 | continue; /* inode table not moved */ |
052db4b7 | 1096 | |
c762c8e6 | 1097 | rfs->needed_blocks += fs->inode_blocks_per_group; |
052db4b7 TT |
1098 | |
1099 | /* | |
1100 | * Mark the new inode table as in use in the new block | |
efc6f628 | 1101 | * allocation bitmap, and move any blocks that might |
c762c8e6 | 1102 | * be necessary. |
052db4b7 | 1103 | */ |
d7cca6b0 | 1104 | for (blk = ext2fs_inode_table_loc(fs, i), j=0; |
c762c8e6 | 1105 | j < fs->inode_blocks_per_group ; j++, blk++) { |
48f23054 | 1106 | ext2fs_block_alloc_stats2(fs, blk, +1); |
3346084b VAH |
1107 | if (ext2fs_test_block_bitmap2(old_fs->block_map, blk) && |
1108 | !ext2fs_test_block_bitmap2(meta_bmap, blk)) | |
1109 | ext2fs_mark_block_bitmap2(rfs->move_blocks, | |
c762c8e6 TT |
1110 | blk); |
1111 | } | |
efc6f628 | 1112 | |
1e1da29f | 1113 | /* |
052db4b7 TT |
1114 | * Make sure the old inode table is reserved in the |
1115 | * block reservation bitmap. | |
1e1da29f | 1116 | */ |
d7cca6b0 | 1117 | for (blk = ext2fs_inode_table_loc(rfs->old_fs, i), j=0; |
052db4b7 | 1118 | j < fs->inode_blocks_per_group ; j++, blk++) |
3346084b | 1119 | ext2fs_mark_block_bitmap2(rfs->reserve_blocks, blk); |
1e1da29f | 1120 | } |
c762c8e6 TT |
1121 | retval = 0; |
1122 | ||
1123 | errout: | |
1124 | if (meta_bmap) | |
1125 | ext2fs_free_block_bitmap(meta_bmap); | |
efc6f628 | 1126 | |
c762c8e6 | 1127 | return retval; |
1e1da29f | 1128 | } |
24b2c7a7 | 1129 | |
a8519a2d TT |
1130 | /* |
1131 | * This helper function tries to allocate a new block. We try to | |
1132 | * avoid hitting the original group descriptor blocks at least at | |
1133 | * first, since we want to make it possible to recover from a badly | |
1134 | * aborted resize operation as much as possible. | |
1135 | * | |
1136 | * In the future, I may further modify this routine to balance out | |
1137 | * where we get the new blocks across the various block groups. | |
1138 | * Ideally we would allocate blocks that corresponded with the block | |
1139 | * group of the containing inode, and keep contiguous blocks | |
1140 | * together. However, this very difficult to do efficiently, since we | |
1141 | * don't have the necessary information up front. | |
1142 | */ | |
1143 | ||
1144 | #define AVOID_OLD 1 | |
1145 | #define DESPERATION 2 | |
1146 | ||
1147 | static void init_block_alloc(ext2_resize_t rfs) | |
1148 | { | |
1149 | rfs->alloc_state = AVOID_OLD; | |
1150 | rfs->new_blk = rfs->new_fs->super->s_first_data_block; | |
2bc4d4f7 TT |
1151 | #if 0 |
1152 | /* HACK for testing */ | |
4efbac6f VAH |
1153 | if (ext2fs_blocks_count(rfs->new_fs->super) > |
1154 | ext2fs_blocks_count(rfs->old_fs->super)) | |
1155 | rfs->new_blk = ext2fs_blocks_count(rfs->old_fs->super); | |
2bc4d4f7 | 1156 | #endif |
a8519a2d TT |
1157 | } |
1158 | ||
8728d506 | 1159 | static blk64_t get_new_block(ext2_resize_t rfs) |
a8519a2d TT |
1160 | { |
1161 | ext2_filsys fs = rfs->new_fs; | |
efc6f628 | 1162 | |
a8519a2d | 1163 | while (1) { |
4efbac6f | 1164 | if (rfs->new_blk >= ext2fs_blocks_count(fs->super)) { |
a8519a2d TT |
1165 | if (rfs->alloc_state == DESPERATION) |
1166 | return 0; | |
1167 | ||
1168 | #ifdef RESIZE2FS_DEBUG | |
1169 | if (rfs->flags & RESIZE_DEBUG_BMOVE) | |
f35fd3d5 TT |
1170 | printf("Going into desperation mode " |
1171 | "for block allocations\n"); | |
efc6f628 | 1172 | #endif |
a8519a2d TT |
1173 | rfs->alloc_state = DESPERATION; |
1174 | rfs->new_blk = fs->super->s_first_data_block; | |
1175 | continue; | |
1176 | } | |
3346084b VAH |
1177 | if (ext2fs_test_block_bitmap2(fs->block_map, rfs->new_blk) || |
1178 | ext2fs_test_block_bitmap2(rfs->reserve_blocks, | |
a8519a2d TT |
1179 | rfs->new_blk) || |
1180 | ((rfs->alloc_state == AVOID_OLD) && | |
4efbac6f | 1181 | (rfs->new_blk < ext2fs_blocks_count(rfs->old_fs->super)) && |
3346084b | 1182 | ext2fs_test_block_bitmap2(rfs->old_fs->block_map, |
a8519a2d TT |
1183 | rfs->new_blk))) { |
1184 | rfs->new_blk++; | |
1185 | continue; | |
1186 | } | |
1187 | return rfs->new_blk; | |
1188 | } | |
1189 | } | |
1190 | ||
7f9c96ee TT |
1191 | static errcode_t resize2fs_get_alloc_block(ext2_filsys fs, blk64_t goal, |
1192 | blk64_t *ret) | |
1193 | { | |
1194 | ext2_resize_t rfs = (ext2_resize_t) fs->priv_data; | |
8728d506 | 1195 | blk64_t blk; |
7f9c96ee TT |
1196 | |
1197 | blk = get_new_block(rfs); | |
1198 | if (!blk) | |
1199 | return ENOSPC; | |
1200 | ||
1201 | #ifdef RESIZE2FS_DEBUG | |
1202 | if (rfs->flags & 0xF) | |
8728d506 | 1203 | printf("get_alloc_block allocating %llu\n", blk); |
7f9c96ee TT |
1204 | #endif |
1205 | ||
3346084b VAH |
1206 | ext2fs_mark_block_bitmap2(rfs->old_fs->block_map, blk); |
1207 | ext2fs_mark_block_bitmap2(rfs->new_fs->block_map, blk); | |
7f9c96ee TT |
1208 | *ret = (blk64_t) blk; |
1209 | return 0; | |
1210 | } | |
1211 | ||
a8519a2d TT |
1212 | static errcode_t block_mover(ext2_resize_t rfs) |
1213 | { | |
8728d506 | 1214 | blk64_t blk, old_blk, new_blk; |
a8519a2d TT |
1215 | ext2_filsys fs = rfs->new_fs; |
1216 | ext2_filsys old_fs = rfs->old_fs; | |
1217 | errcode_t retval; | |
8728d506 VAH |
1218 | __u64 size; |
1219 | int c; | |
a8519a2d | 1220 | int to_move, moved; |
7d7bdd57 TT |
1221 | ext2_badblocks_list badblock_list = 0; |
1222 | int bb_modified = 0; | |
efc6f628 | 1223 | |
7f9c96ee TT |
1224 | fs->get_alloc_block = resize2fs_get_alloc_block; |
1225 | old_fs->get_alloc_block = resize2fs_get_alloc_block; | |
1226 | ||
7d7bdd57 TT |
1227 | retval = ext2fs_read_bb_inode(old_fs, &badblock_list); |
1228 | if (retval) | |
1229 | return retval; | |
a8519a2d TT |
1230 | |
1231 | new_blk = fs->super->s_first_data_block; | |
1232 | if (!rfs->itable_buf) { | |
e5aace90 | 1233 | retval = ext2fs_get_array(fs->blocksize, |
a8519a2d | 1234 | fs->inode_blocks_per_group, |
c4e3d3f3 | 1235 | &rfs->itable_buf); |
a8519a2d TT |
1236 | if (retval) |
1237 | return retval; | |
1238 | } | |
1239 | retval = ext2fs_create_extent_table(&rfs->bmap, 0); | |
1240 | if (retval) | |
1241 | return retval; | |
1242 | ||
1243 | /* | |
1244 | * The first step is to figure out where all of the blocks | |
1245 | * will go. | |
1246 | */ | |
1247 | to_move = moved = 0; | |
1248 | init_block_alloc(rfs); | |
d1a1a583 TT |
1249 | for (blk = B2C(old_fs->super->s_first_data_block); |
1250 | blk < ext2fs_blocks_count(old_fs->super); | |
1251 | blk += EXT2FS_CLUSTER_RATIO(fs)) { | |
3346084b | 1252 | if (!ext2fs_test_block_bitmap2(old_fs->block_map, blk)) |
a8519a2d | 1253 | continue; |
3346084b | 1254 | if (!ext2fs_test_block_bitmap2(rfs->move_blocks, blk)) |
a8519a2d | 1255 | continue; |
7d7bdd57 TT |
1256 | if (ext2fs_badblocks_list_test(badblock_list, blk)) { |
1257 | ext2fs_badblocks_list_del(badblock_list, blk); | |
1258 | bb_modified++; | |
1259 | continue; | |
1260 | } | |
a8519a2d TT |
1261 | |
1262 | new_blk = get_new_block(rfs); | |
1263 | if (!new_blk) { | |
1264 | retval = ENOSPC; | |
1265 | goto errout; | |
1266 | } | |
48f23054 | 1267 | ext2fs_block_alloc_stats2(fs, new_blk, +1); |
d1a1a583 | 1268 | ext2fs_add_extent_entry(rfs->bmap, B2C(blk), B2C(new_blk)); |
a8519a2d TT |
1269 | to_move++; |
1270 | } | |
efc6f628 | 1271 | |
a8519a2d | 1272 | if (to_move == 0) { |
cefbf487 TT |
1273 | if (rfs->bmap) { |
1274 | ext2fs_free_extent_table(rfs->bmap); | |
1275 | rfs->bmap = 0; | |
1276 | } | |
a8519a2d TT |
1277 | retval = 0; |
1278 | goto errout; | |
1279 | } | |
1280 | ||
1281 | /* | |
1282 | * Step two is to actually move the blocks | |
1283 | */ | |
1284 | retval = ext2fs_iterate_extent(rfs->bmap, 0, 0, 0); | |
1285 | if (retval) goto errout; | |
1286 | ||
3b627e8d TT |
1287 | if (rfs->progress) { |
1288 | retval = (rfs->progress)(rfs, E2_RSZ_BLOCK_RELOC_PASS, | |
1289 | 0, to_move); | |
1290 | if (retval) | |
1291 | goto errout; | |
1292 | } | |
a8519a2d TT |
1293 | while (1) { |
1294 | retval = ext2fs_iterate_extent(rfs->bmap, &old_blk, &new_blk, &size); | |
1295 | if (retval) goto errout; | |
1296 | if (!size) | |
1297 | break; | |
d1a1a583 TT |
1298 | old_blk = C2B(old_blk); |
1299 | new_blk = C2B(new_blk); | |
1300 | size = C2B(size); | |
a8519a2d TT |
1301 | #ifdef RESIZE2FS_DEBUG |
1302 | if (rfs->flags & RESIZE_DEBUG_BMOVE) | |
8728d506 | 1303 | printf("Moving %llu blocks %llu->%llu\n", |
f35fd3d5 | 1304 | size, old_blk, new_blk); |
a8519a2d TT |
1305 | #endif |
1306 | do { | |
1307 | c = size; | |
1308 | if (c > fs->inode_blocks_per_group) | |
1309 | c = fs->inode_blocks_per_group; | |
24a117ab VAH |
1310 | retval = io_channel_read_blk64(fs->io, old_blk, c, |
1311 | rfs->itable_buf); | |
a8519a2d | 1312 | if (retval) goto errout; |
24a117ab VAH |
1313 | retval = io_channel_write_blk64(fs->io, new_blk, c, |
1314 | rfs->itable_buf); | |
a8519a2d TT |
1315 | if (retval) goto errout; |
1316 | size -= c; | |
1317 | new_blk += c; | |
1318 | old_blk += c; | |
1319 | moved += c; | |
1320 | if (rfs->progress) { | |
1321 | io_channel_flush(fs->io); | |
3b627e8d TT |
1322 | retval = (rfs->progress)(rfs, |
1323 | E2_RSZ_BLOCK_RELOC_PASS, | |
a8519a2d | 1324 | moved, to_move); |
3b627e8d TT |
1325 | if (retval) |
1326 | goto errout; | |
a8519a2d TT |
1327 | } |
1328 | } while (size > 0); | |
1329 | io_channel_flush(fs->io); | |
1330 | } | |
1331 | ||
1332 | errout: | |
7d7bdd57 TT |
1333 | if (badblock_list) { |
1334 | if (!retval && bb_modified) | |
1335 | retval = ext2fs_update_bb_inode(old_fs, | |
1336 | badblock_list); | |
1337 | ext2fs_badblocks_list_free(badblock_list); | |
1338 | } | |
a8519a2d TT |
1339 | return retval; |
1340 | } | |
1341 | ||
1342 | ||
1343 | /* -------------------------------------------------------------------- | |
1344 | * | |
1345 | * Resize processing, phase 3 | |
1346 | * | |
1347 | * -------------------------------------------------------------------- | |
1348 | */ | |
1349 | ||
1350 | ||
d1a1a583 TT |
1351 | /* |
1352 | * The extent translation table is stored in clusters so we need to | |
1353 | * take special care when mapping a source block number to its | |
1354 | * destination block number. | |
1355 | */ | |
f404167d | 1356 | static __u64 extent_translate(ext2_filsys fs, ext2_extent extent, __u64 old_loc) |
d1a1a583 TT |
1357 | { |
1358 | __u64 new_block = C2B(ext2fs_extent_translate(extent, B2C(old_loc))); | |
1359 | ||
1360 | if (new_block != 0) | |
1361 | new_block += old_loc & (EXT2FS_CLUSTER_RATIO(fs) - 1); | |
1362 | return new_block; | |
1363 | } | |
1364 | ||
a8519a2d TT |
1365 | struct process_block_struct { |
1366 | ext2_resize_t rfs; | |
dfcdc32f | 1367 | ext2_ino_t ino; |
a8519a2d TT |
1368 | struct ext2_inode * inode; |
1369 | errcode_t error; | |
1370 | int is_dir; | |
1371 | int changed; | |
1372 | }; | |
1373 | ||
8728d506 | 1374 | static int process_block(ext2_filsys fs, blk64_t *block_nr, |
efc6f628 | 1375 | e2_blkcnt_t blockcnt, |
8728d506 | 1376 | blk64_t ref_block EXT2FS_ATTR((unused)), |
54434927 | 1377 | int ref_offset EXT2FS_ATTR((unused)), void *priv_data) |
a8519a2d TT |
1378 | { |
1379 | struct process_block_struct *pb; | |
1380 | errcode_t retval; | |
8728d506 | 1381 | blk64_t block, new_block; |
a8519a2d TT |
1382 | int ret = 0; |
1383 | ||
1384 | pb = (struct process_block_struct *) priv_data; | |
1385 | block = *block_nr; | |
1386 | if (pb->rfs->bmap) { | |
d1a1a583 | 1387 | new_block = extent_translate(fs, pb->rfs->bmap, block); |
a8519a2d TT |
1388 | if (new_block) { |
1389 | *block_nr = new_block; | |
1390 | ret |= BLOCK_CHANGED; | |
1391 | pb->changed = 1; | |
1392 | #ifdef RESIZE2FS_DEBUG | |
1393 | if (pb->rfs->flags & RESIZE_DEBUG_BMOVE) | |
8728d506 | 1394 | printf("ino=%u, blockcnt=%lld, %llu->%llu\n", |
a8519a2d TT |
1395 | pb->ino, blockcnt, block, new_block); |
1396 | #endif | |
1397 | block = new_block; | |
1398 | } | |
1399 | } | |
1400 | if (pb->is_dir) { | |
8728d506 VAH |
1401 | retval = ext2fs_add_dir_block2(fs->dblist, pb->ino, |
1402 | block, (int) blockcnt); | |
a8519a2d TT |
1403 | if (retval) { |
1404 | pb->error = retval; | |
1405 | ret |= BLOCK_ABORT; | |
1406 | } | |
1407 | } | |
1408 | return ret; | |
1409 | } | |
1410 | ||
1411 | /* | |
1412 | * Progress callback | |
1413 | */ | |
efc6f628 | 1414 | static errcode_t progress_callback(ext2_filsys fs, |
54434927 | 1415 | ext2_inode_scan scan EXT2FS_ATTR((unused)), |
a8519a2d TT |
1416 | dgrp_t group, void * priv_data) |
1417 | { | |
1418 | ext2_resize_t rfs = (ext2_resize_t) priv_data; | |
3b627e8d | 1419 | errcode_t retval; |
a8519a2d TT |
1420 | |
1421 | /* | |
f4b2a6db TT |
1422 | * This check is to protect against old ext2 libraries. It |
1423 | * shouldn't be needed against new libraries. | |
a8519a2d | 1424 | */ |
f4b2a6db | 1425 | if ((group+1) == 0) |
a8519a2d TT |
1426 | return 0; |
1427 | ||
1428 | if (rfs->progress) { | |
1429 | io_channel_flush(fs->io); | |
3b627e8d TT |
1430 | retval = (rfs->progress)(rfs, E2_RSZ_INODE_SCAN_PASS, |
1431 | group+1, fs->group_desc_count); | |
1432 | if (retval) | |
1433 | return retval; | |
a8519a2d | 1434 | } |
efc6f628 | 1435 | |
a8519a2d TT |
1436 | return 0; |
1437 | } | |
1438 | ||
1439 | static errcode_t inode_scan_and_fix(ext2_resize_t rfs) | |
1440 | { | |
1441 | struct process_block_struct pb; | |
dfcdc32f | 1442 | ext2_ino_t ino, new_inode; |
edfd9b0a | 1443 | struct ext2_inode *inode = NULL; |
a8519a2d TT |
1444 | ext2_inode_scan scan = NULL; |
1445 | errcode_t retval; | |
a8519a2d | 1446 | char *block_buf = 0; |
dfcdc32f | 1447 | ext2_ino_t start_to_move; |
8728d506 VAH |
1448 | blk64_t orig_size; |
1449 | blk64_t new_block; | |
4ef28824 | 1450 | int inode_size; |
efc6f628 | 1451 | |
a8519a2d TT |
1452 | if ((rfs->old_fs->group_desc_count <= |
1453 | rfs->new_fs->group_desc_count) && | |
1454 | !rfs->bmap) | |
1455 | return 0; | |
1456 | ||
2bc4d4f7 TT |
1457 | /* |
1458 | * Save the original size of the old filesystem, and | |
1459 | * temporarily set the size to be the new size if the new size | |
1460 | * is larger. We need to do this to avoid catching an error | |
1461 | * by the block iterator routines | |
1462 | */ | |
4efbac6f VAH |
1463 | orig_size = ext2fs_blocks_count(rfs->old_fs->super); |
1464 | if (orig_size < ext2fs_blocks_count(rfs->new_fs->super)) | |
1465 | ext2fs_blocks_count_set(rfs->old_fs->super, | |
1466 | ext2fs_blocks_count(rfs->new_fs->super)); | |
2bc4d4f7 | 1467 | |
a8519a2d TT |
1468 | retval = ext2fs_open_inode_scan(rfs->old_fs, 0, &scan); |
1469 | if (retval) goto errout; | |
1470 | ||
1471 | retval = ext2fs_init_dblist(rfs->old_fs, 0); | |
1472 | if (retval) goto errout; | |
e5aace90 | 1473 | retval = ext2fs_get_array(rfs->old_fs->blocksize, 3, &block_buf); |
a8519a2d TT |
1474 | if (retval) goto errout; |
1475 | ||
1476 | start_to_move = (rfs->new_fs->group_desc_count * | |
1477 | rfs->new_fs->super->s_inodes_per_group); | |
efc6f628 | 1478 | |
3b627e8d TT |
1479 | if (rfs->progress) { |
1480 | retval = (rfs->progress)(rfs, E2_RSZ_INODE_SCAN_PASS, | |
1481 | 0, rfs->old_fs->group_desc_count); | |
1482 | if (retval) | |
1483 | goto errout; | |
1484 | } | |
a8519a2d TT |
1485 | ext2fs_set_inode_callback(scan, progress_callback, (void *) rfs); |
1486 | pb.rfs = rfs; | |
edfd9b0a | 1487 | pb.inode = inode; |
a8519a2d TT |
1488 | pb.error = 0; |
1489 | new_inode = EXT2_FIRST_INODE(rfs->new_fs->super); | |
4ef28824 | 1490 | inode_size = EXT2_INODE_SIZE(rfs->new_fs->super); |
edfd9b0a TT |
1491 | inode = malloc(inode_size); |
1492 | if (!inode) { | |
4ef28824 ES |
1493 | retval = ENOMEM; |
1494 | goto errout; | |
1495 | } | |
a8519a2d TT |
1496 | /* |
1497 | * First, copy all of the inodes that need to be moved | |
1498 | * elsewhere in the inode table | |
1499 | */ | |
1500 | while (1) { | |
edfd9b0a | 1501 | retval = ext2fs_get_next_inode_full(scan, &ino, inode, inode_size); |
a8519a2d TT |
1502 | if (retval) goto errout; |
1503 | if (!ino) | |
1504 | break; | |
1505 | ||
edfd9b0a | 1506 | if (inode->i_links_count == 0 && ino != EXT2_RESIZE_INO) |
a8519a2d TT |
1507 | continue; /* inode not in use */ |
1508 | ||
edfd9b0a | 1509 | pb.is_dir = LINUX_S_ISDIR(inode->i_mode); |
a8519a2d TT |
1510 | pb.changed = 0; |
1511 | ||
0c80c44b | 1512 | if (ext2fs_file_acl_block(rfs->old_fs, inode) && rfs->bmap) { |
d1a1a583 | 1513 | new_block = extent_translate(rfs->old_fs, rfs->bmap, |
0c80c44b | 1514 | ext2fs_file_acl_block(rfs->old_fs, inode)); |
ed909bbe | 1515 | if (new_block) { |
0c80c44b TT |
1516 | ext2fs_file_acl_block_set(rfs->old_fs, inode, |
1517 | new_block); | |
efc6f628 | 1518 | retval = ext2fs_write_inode_full(rfs->old_fs, |
edfd9b0a | 1519 | ino, inode, inode_size); |
ed909bbe TT |
1520 | if (retval) goto errout; |
1521 | } | |
1522 | } | |
efc6f628 | 1523 | |
0c80c44b | 1524 | if (ext2fs_inode_has_valid_blocks2(rfs->old_fs, inode) && |
a8519a2d TT |
1525 | (rfs->bmap || pb.is_dir)) { |
1526 | pb.ino = ino; | |
8728d506 | 1527 | retval = ext2fs_block_iterate3(rfs->old_fs, |
a8519a2d TT |
1528 | ino, 0, block_buf, |
1529 | process_block, &pb); | |
1530 | if (retval) | |
1531 | goto errout; | |
1532 | if (pb.error) { | |
1533 | retval = pb.error; | |
1534 | goto errout; | |
1535 | } | |
1536 | } | |
1537 | ||
1538 | if (ino <= start_to_move) | |
1539 | continue; /* Don't need to move it. */ | |
1540 | ||
1541 | /* | |
1542 | * Find a new inode | |
1543 | */ | |
86acdebd TT |
1544 | retval = ext2fs_new_inode(rfs->new_fs, 0, 0, 0, &new_inode); |
1545 | if (retval) | |
1546 | goto errout; | |
1547 | ||
74128f8d TT |
1548 | ext2fs_inode_alloc_stats2(rfs->new_fs, new_inode, +1, |
1549 | pb.is_dir); | |
a8519a2d TT |
1550 | if (pb.changed) { |
1551 | /* Get the new version of the inode */ | |
4ef28824 | 1552 | retval = ext2fs_read_inode_full(rfs->old_fs, ino, |
edfd9b0a | 1553 | inode, inode_size); |
a8519a2d TT |
1554 | if (retval) goto errout; |
1555 | } | |
edfd9b0a | 1556 | inode->i_ctime = time(0); |
4ef28824 | 1557 | retval = ext2fs_write_inode_full(rfs->old_fs, new_inode, |
edfd9b0a | 1558 | inode, inode_size); |
a8519a2d TT |
1559 | if (retval) goto errout; |
1560 | ||
a8519a2d TT |
1561 | #ifdef RESIZE2FS_DEBUG |
1562 | if (rfs->flags & RESIZE_DEBUG_INODEMAP) | |
f35fd3d5 | 1563 | printf("Inode moved %u->%u\n", ino, new_inode); |
a8519a2d TT |
1564 | #endif |
1565 | if (!rfs->imap) { | |
1566 | retval = ext2fs_create_extent_table(&rfs->imap, 0); | |
1567 | if (retval) | |
1568 | goto errout; | |
1569 | } | |
1570 | ext2fs_add_extent_entry(rfs->imap, ino, new_inode); | |
1571 | } | |
1572 | io_channel_flush(rfs->old_fs->io); | |
1573 | ||
1574 | errout: | |
4efbac6f | 1575 | ext2fs_blocks_count_set(rfs->old_fs->super, orig_size); |
a8519a2d TT |
1576 | if (rfs->bmap) { |
1577 | ext2fs_free_extent_table(rfs->bmap); | |
1578 | rfs->bmap = 0; | |
1579 | } | |
1580 | if (scan) | |
1581 | ext2fs_close_inode_scan(scan); | |
1582 | if (block_buf) | |
c4e3d3f3 | 1583 | ext2fs_free_mem(&block_buf); |
45e338f5 | 1584 | free(inode); |
a8519a2d TT |
1585 | return retval; |
1586 | } | |
1587 | ||
1588 | /* -------------------------------------------------------------------- | |
1589 | * | |
1590 | * Resize processing, phase 4. | |
1591 | * | |
1592 | * -------------------------------------------------------------------- | |
1593 | */ | |
1594 | ||
1595 | struct istruct { | |
1596 | ext2_resize_t rfs; | |
3b627e8d | 1597 | errcode_t err; |
03fa6f8a TT |
1598 | unsigned int max_dirs; |
1599 | unsigned int num; | |
a8519a2d TT |
1600 | }; |
1601 | ||
efc6f628 | 1602 | static int check_and_change_inodes(ext2_ino_t dir, |
54434927 | 1603 | int entry EXT2FS_ATTR((unused)), |
a8519a2d | 1604 | struct ext2_dir_entry *dirent, int offset, |
54434927 | 1605 | int blocksize EXT2FS_ATTR((unused)), |
efc6f628 | 1606 | char *buf EXT2FS_ATTR((unused)), |
54434927 | 1607 | void *priv_data) |
a8519a2d TT |
1608 | { |
1609 | struct istruct *is = (struct istruct *) priv_data; | |
085d2a83 TT |
1610 | struct ext2_inode inode; |
1611 | ext2_ino_t new_inode; | |
1612 | errcode_t retval; | |
a8519a2d TT |
1613 | |
1614 | if (is->rfs->progress && offset == 0) { | |
1615 | io_channel_flush(is->rfs->old_fs->io); | |
3b627e8d TT |
1616 | is->err = (is->rfs->progress)(is->rfs, |
1617 | E2_RSZ_INODE_REF_UPD_PASS, | |
1333fe93 | 1618 | ++is->num, is->max_dirs); |
3b627e8d TT |
1619 | if (is->err) |
1620 | return DIRENT_ABORT; | |
a8519a2d TT |
1621 | } |
1622 | ||
1623 | if (!dirent->inode) | |
1624 | return 0; | |
1625 | ||
1626 | new_inode = ext2fs_extent_translate(is->rfs->imap, dirent->inode); | |
1627 | ||
1628 | if (!new_inode) | |
1629 | return 0; | |
1630 | #ifdef RESIZE2FS_DEBUG | |
1631 | if (is->rfs->flags & RESIZE_DEBUG_INODEMAP) | |
f35fd3d5 | 1632 | printf("Inode translate (dir=%u, name=%.*s, %u->%u)\n", |
06191693 | 1633 | dir, dirent->name_len&0xFF, dirent->name, |
a8519a2d TT |
1634 | dirent->inode, new_inode); |
1635 | #endif | |
1636 | ||
1637 | dirent->inode = new_inode; | |
1638 | ||
085d2a83 TT |
1639 | /* Update the directory mtime and ctime */ |
1640 | retval = ext2fs_read_inode(is->rfs->old_fs, dir, &inode); | |
1641 | if (retval == 0) { | |
1642 | inode.i_mtime = inode.i_ctime = time(0); | |
d2b2a488 BB |
1643 | is->err = ext2fs_write_inode(is->rfs->old_fs, dir, &inode); |
1644 | if (is->err) | |
1645 | return DIRENT_ABORT; | |
085d2a83 TT |
1646 | } |
1647 | ||
a8519a2d TT |
1648 | return DIRENT_CHANGED; |
1649 | } | |
1650 | ||
1651 | static errcode_t inode_ref_fix(ext2_resize_t rfs) | |
1652 | { | |
1653 | errcode_t retval; | |
1654 | struct istruct is; | |
efc6f628 | 1655 | |
a8519a2d TT |
1656 | if (!rfs->imap) |
1657 | return 0; | |
efc6f628 | 1658 | |
a8519a2d TT |
1659 | /* |
1660 | * Now, we iterate over all of the directories to update the | |
1661 | * inode references | |
1662 | */ | |
1663 | is.num = 0; | |
8728d506 | 1664 | is.max_dirs = ext2fs_dblist_count2(rfs->old_fs->dblist); |
a8519a2d | 1665 | is.rfs = rfs; |
3b627e8d | 1666 | is.err = 0; |
a8519a2d | 1667 | |
3b627e8d TT |
1668 | if (rfs->progress) { |
1669 | retval = (rfs->progress)(rfs, E2_RSZ_INODE_REF_UPD_PASS, | |
1333fe93 | 1670 | 0, is.max_dirs); |
3b627e8d TT |
1671 | if (retval) |
1672 | goto errout; | |
1673 | } | |
efc6f628 | 1674 | |
a8519a2d TT |
1675 | retval = ext2fs_dblist_dir_iterate(rfs->old_fs->dblist, |
1676 | DIRENT_FLAG_INCLUDE_EMPTY, 0, | |
1677 | check_and_change_inodes, &is); | |
3b627e8d TT |
1678 | if (retval) |
1679 | goto errout; | |
1680 | if (is.err) { | |
1681 | retval = is.err; | |
1682 | goto errout; | |
1683 | } | |
a8519a2d | 1684 | |
88dbf828 TT |
1685 | if (rfs->progress && (is.num < is.max_dirs)) |
1686 | (rfs->progress)(rfs, E2_RSZ_INODE_REF_UPD_PASS, | |
1687 | is.max_dirs, is.max_dirs); | |
1688 | ||
3b627e8d | 1689 | errout: |
a8519a2d TT |
1690 | ext2fs_free_extent_table(rfs->imap); |
1691 | rfs->imap = 0; | |
1692 | return retval; | |
1693 | } | |
1694 | ||
1695 | ||
1696 | /* -------------------------------------------------------------------- | |
1697 | * | |
1698 | * Resize processing, phase 5. | |
1699 | * | |
1700 | * In this phase we actually move the inode table around, and then | |
1701 | * update the summary statistics. This is scary, since aborting here | |
1702 | * will potentially scramble the filesystem. (We are moving the | |
1703 | * inode tables around in place, and so the potential for lost data, | |
1704 | * or at the very least scrambling the mapping between filenames and | |
1705 | * inode numbers is very high in case of a power failure here.) | |
1706 | * -------------------------------------------------------------------- | |
1707 | */ | |
1708 | ||
24b2c7a7 | 1709 | |
052db4b7 TT |
1710 | /* |
1711 | * A very scary routine --- this one moves the inode table around!!! | |
1712 | * | |
1713 | * After this you have to use the rfs->new_fs file handle to read and | |
1714 | * write inodes. | |
1715 | */ | |
c762c8e6 | 1716 | static errcode_t move_itables(ext2_resize_t rfs) |
052db4b7 | 1717 | { |
8728d506 VAH |
1718 | int n, num, size; |
1719 | long long diff; | |
54434927 | 1720 | dgrp_t i, max_groups; |
052db4b7 | 1721 | ext2_filsys fs = rfs->new_fs; |
05e112a1 | 1722 | char *cp; |
8728d506 | 1723 | blk64_t old_blk, new_blk, blk; |
a8519a2d | 1724 | errcode_t retval; |
64ad98ac | 1725 | int j, to_move, moved; |
052db4b7 | 1726 | |
1333fe93 TT |
1727 | max_groups = fs->group_desc_count; |
1728 | if (max_groups > rfs->old_fs->group_desc_count) | |
1729 | max_groups = rfs->old_fs->group_desc_count; | |
052db4b7 | 1730 | |
05e112a1 TT |
1731 | size = fs->blocksize * fs->inode_blocks_per_group; |
1732 | if (!rfs->itable_buf) { | |
c4e3d3f3 | 1733 | retval = ext2fs_get_mem(size, &rfs->itable_buf); |
ca8abba7 TT |
1734 | if (retval) |
1735 | return retval; | |
05e112a1 | 1736 | } |
c762c8e6 TT |
1737 | |
1738 | /* | |
1739 | * Figure out how many inode tables we need to move | |
1740 | */ | |
1741 | to_move = moved = 0; | |
1333fe93 | 1742 | for (i=0; i < max_groups; i++) |
d7cca6b0 VAH |
1743 | if (ext2fs_inode_table_loc(rfs->old_fs, i) != |
1744 | ext2fs_inode_table_loc(fs, i)) | |
c762c8e6 TT |
1745 | to_move++; |
1746 | ||
1747 | if (to_move == 0) | |
1748 | return 0; | |
1749 | ||
3b627e8d TT |
1750 | if (rfs->progress) { |
1751 | retval = rfs->progress(rfs, E2_RSZ_MOVE_ITABLE_PASS, | |
1752 | 0, to_move); | |
1753 | if (retval) | |
1754 | goto errout; | |
1755 | } | |
63b44fbe | 1756 | |
a8519a2d TT |
1757 | rfs->old_fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; |
1758 | ||
1333fe93 | 1759 | for (i=0; i < max_groups; i++) { |
d7cca6b0 VAH |
1760 | old_blk = ext2fs_inode_table_loc(rfs->old_fs, i); |
1761 | new_blk = ext2fs_inode_table_loc(fs, i); | |
ca8abba7 | 1762 | diff = new_blk - old_blk; |
efc6f628 | 1763 | |
80c0fc34 | 1764 | #ifdef RESIZE2FS_DEBUG |
efc6f628 | 1765 | if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE) |
8728d506 | 1766 | printf("Itable move group %d block %llu->%llu (diff %lld)\n", |
ca8abba7 | 1767 | i, old_blk, new_blk, diff); |
80c0fc34 | 1768 | #endif |
efc6f628 | 1769 | |
05e112a1 | 1770 | if (!diff) |
052db4b7 TT |
1771 | continue; |
1772 | ||
24a117ab VAH |
1773 | retval = io_channel_read_blk64(fs->io, old_blk, |
1774 | fs->inode_blocks_per_group, | |
1775 | rfs->itable_buf); | |
efc6f628 | 1776 | if (retval) |
a8519a2d | 1777 | goto errout; |
05e112a1 TT |
1778 | /* |
1779 | * The end of the inode table segment often contains | |
a8519a2d TT |
1780 | * all zeros, and we're often only moving the inode |
1781 | * table down a block or two. If so, we can optimize | |
1782 | * things by not rewriting blocks that we know to be zero | |
1783 | * already. | |
05e112a1 | 1784 | */ |
2787276e | 1785 | for (cp = rfs->itable_buf+size-1, n=0; n < size; n++, cp--) |
05e112a1 TT |
1786 | if (*cp) |
1787 | break; | |
1788 | n = n >> EXT2_BLOCK_SIZE_BITS(fs->super); | |
80c0fc34 | 1789 | #ifdef RESIZE2FS_DEBUG |
efc6f628 | 1790 | if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE) |
f35fd3d5 | 1791 | printf("%d blocks of zeros...\n", n); |
80c0fc34 | 1792 | #endif |
05e112a1 TT |
1793 | num = fs->inode_blocks_per_group; |
1794 | if (n > diff) | |
1795 | num -= n; | |
1796 | ||
24a117ab VAH |
1797 | retval = io_channel_write_blk64(fs->io, new_blk, |
1798 | num, rfs->itable_buf); | |
052db4b7 | 1799 | if (retval) { |
24a117ab VAH |
1800 | io_channel_write_blk64(fs->io, old_blk, |
1801 | num, rfs->itable_buf); | |
a8519a2d | 1802 | goto errout; |
052db4b7 | 1803 | } |
05e112a1 | 1804 | if (n > diff) { |
24a117ab | 1805 | retval = io_channel_write_blk64(fs->io, |
ca8abba7 | 1806 | old_blk + fs->inode_blocks_per_group, |
a8519a2d TT |
1807 | diff, (rfs->itable_buf + |
1808 | (fs->inode_blocks_per_group - diff) * | |
1809 | fs->blocksize)); | |
05e112a1 | 1810 | if (retval) |
a8519a2d | 1811 | goto errout; |
c762c8e6 | 1812 | } |
64ad98ac | 1813 | |
d7cca6b0 | 1814 | for (blk = ext2fs_inode_table_loc(rfs->old_fs, i), j=0; |
64ad98ac | 1815 | j < fs->inode_blocks_per_group ; j++, blk++) |
48f23054 | 1816 | ext2fs_block_alloc_stats2(fs, blk, -1); |
64ad98ac | 1817 | |
d7cca6b0 | 1818 | ext2fs_inode_table_loc_set(rfs->old_fs, i, new_blk); |
236efede | 1819 | ext2fs_group_desc_csum_set(rfs->old_fs, i); |
a8519a2d | 1820 | ext2fs_mark_super_dirty(rfs->old_fs); |
64ad98ac TT |
1821 | ext2fs_flush(rfs->old_fs); |
1822 | ||
a8519a2d | 1823 | if (rfs->progress) { |
3b627e8d TT |
1824 | retval = rfs->progress(rfs, E2_RSZ_MOVE_ITABLE_PASS, |
1825 | ++moved, to_move); | |
1826 | if (retval) | |
1827 | goto errout; | |
a8519a2d | 1828 | } |
052db4b7 | 1829 | } |
64ad98ac | 1830 | mark_table_blocks(fs, fs->block_map); |
a8519a2d | 1831 | ext2fs_flush(fs); |
80c0fc34 | 1832 | #ifdef RESIZE2FS_DEBUG |
efc6f628 | 1833 | if (rfs->flags & RESIZE_DEBUG_ITABLEMOVE) |
f35fd3d5 | 1834 | printf("Inode table move finished.\n"); |
80c0fc34 | 1835 | #endif |
052db4b7 | 1836 | return 0; |
efc6f628 | 1837 | |
a8519a2d | 1838 | errout: |
052db4b7 TT |
1839 | return retval; |
1840 | } | |
1841 | ||
9213a93b | 1842 | /* |
efc6f628 | 1843 | * Fix the resize inode |
9213a93b TT |
1844 | */ |
1845 | static errcode_t fix_resize_inode(ext2_filsys fs) | |
1846 | { | |
1847 | struct ext2_inode inode; | |
1848 | errcode_t retval; | |
5e27a274 | 1849 | char *block_buf = NULL; |
9213a93b | 1850 | |
efc6f628 | 1851 | if (!(fs->super->s_feature_compat & |
9213a93b TT |
1852 | EXT2_FEATURE_COMPAT_RESIZE_INODE)) |
1853 | return 0; | |
1854 | ||
1855 | retval = ext2fs_get_mem(fs->blocksize, &block_buf); | |
1856 | if (retval) goto errout; | |
1857 | ||
1858 | retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode); | |
1859 | if (retval) goto errout; | |
1860 | ||
1ca1059f | 1861 | ext2fs_iblk_set(fs, &inode, 1); |
9213a93b TT |
1862 | |
1863 | retval = ext2fs_write_inode(fs, EXT2_RESIZE_INO, &inode); | |
1864 | if (retval) goto errout; | |
1865 | ||
1866 | if (!inode.i_block[EXT2_DIND_BLOCK]) { | |
efc6f628 | 1867 | /* |
9213a93b TT |
1868 | * Avoid zeroing out block #0; that's rude. This |
1869 | * should never happen anyway since the filesystem | |
1870 | * should be fsck'ed and we assume it is consistent. | |
1871 | */ | |
45ff69ff | 1872 | fprintf(stderr, "%s", |
f35fd3d5 | 1873 | _("Should never happen: resize inode corrupt!\n")); |
9213a93b TT |
1874 | exit(1); |
1875 | } | |
1876 | ||
1877 | memset(block_buf, 0, fs->blocksize); | |
1878 | ||
24a117ab VAH |
1879 | retval = io_channel_write_blk64(fs->io, inode.i_block[EXT2_DIND_BLOCK], |
1880 | 1, block_buf); | |
9213a93b | 1881 | if (retval) goto errout; |
efc6f628 | 1882 | |
9213a93b TT |
1883 | retval = ext2fs_create_resize_inode(fs); |
1884 | if (retval) | |
1885 | goto errout; | |
1886 | ||
1887 | errout: | |
1888 | if (block_buf) | |
1889 | ext2fs_free_mem(&block_buf); | |
1890 | return retval; | |
1891 | } | |
1892 | ||
052db4b7 TT |
1893 | /* |
1894 | * Finally, recalculate the summary information | |
1895 | */ | |
1896 | static errcode_t ext2fs_calculate_summary_stats(ext2_filsys fs) | |
1897 | { | |
8728d506 | 1898 | blk64_t blk; |
dfcdc32f | 1899 | ext2_ino_t ino; |
54434927 TT |
1900 | unsigned int group = 0; |
1901 | unsigned int count = 0; | |
2279fd78 TT |
1902 | blk64_t total_blocks_free = 0; |
1903 | int total_inodes_free = 0; | |
dfcdc32f | 1904 | int group_free = 0; |
74128f8d | 1905 | int uninit = 0; |
8728d506 | 1906 | blk64_t super_blk, old_desc_blk, new_desc_blk; |
74128f8d | 1907 | int old_desc_blocks; |
052db4b7 TT |
1908 | |
1909 | /* | |
1910 | * First calculate the block statistics | |
1911 | */ | |
cd65a24e | 1912 | uninit = ext2fs_bg_flags_test(fs, group, EXT2_BG_BLOCK_UNINIT); |
8728d506 VAH |
1913 | ext2fs_super_and_bgd_loc2(fs, group, &super_blk, &old_desc_blk, |
1914 | &new_desc_blk, 0); | |
74128f8d TT |
1915 | if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) |
1916 | old_desc_blocks = fs->super->s_first_meta_bg; | |
1917 | else | |
1918 | old_desc_blocks = fs->desc_blocks + | |
1919 | fs->super->s_reserved_gdt_blocks; | |
1773c87c TT |
1920 | for (blk = B2C(fs->super->s_first_data_block); |
1921 | blk < ext2fs_blocks_count(fs->super); | |
1922 | blk += EXT2FS_CLUSTER_RATIO(fs)) { | |
74128f8d | 1923 | if ((uninit && |
1773c87c | 1924 | !(EQ_CLSTR(blk, super_blk) || |
74128f8d | 1925 | ((old_desc_blk && old_desc_blocks && |
1773c87c TT |
1926 | GE_CLSTR(blk, old_desc_blk) && |
1927 | LT_CLSTR(blk, old_desc_blk + old_desc_blocks))) || | |
1928 | ((new_desc_blk && EQ_CLSTR(blk, new_desc_blk))) || | |
1929 | EQ_CLSTR(blk, ext2fs_block_bitmap_loc(fs, group)) || | |
1930 | EQ_CLSTR(blk, ext2fs_inode_bitmap_loc(fs, group)) || | |
1931 | ((GE_CLSTR(blk, ext2fs_inode_table_loc(fs, group)) && | |
1932 | LT_CLSTR(blk, ext2fs_inode_table_loc(fs, group) | |
1933 | + fs->inode_blocks_per_group))))) || | |
3346084b | 1934 | (!ext2fs_fast_test_block_bitmap2(fs->block_map, blk))) { |
052db4b7 | 1935 | group_free++; |
2279fd78 | 1936 | total_blocks_free++; |
052db4b7 TT |
1937 | } |
1938 | count++; | |
1773c87c TT |
1939 | if ((count == fs->super->s_clusters_per_group) || |
1940 | EQ_CLSTR(blk, ext2fs_blocks_count(fs->super)-1)) { | |
d7cca6b0 | 1941 | ext2fs_bg_free_blocks_count_set(fs, group, group_free); |
236efede JS |
1942 | ext2fs_group_desc_csum_set(fs, group); |
1943 | group++; | |
4828bbe9 TT |
1944 | if (group >= fs->group_desc_count) |
1945 | break; | |
052db4b7 TT |
1946 | count = 0; |
1947 | group_free = 0; | |
8728d506 VAH |
1948 | uninit = ext2fs_bg_flags_test(fs, group, EXT2_BG_BLOCK_UNINIT); |
1949 | ext2fs_super_and_bgd_loc2(fs, group, &super_blk, | |
1950 | &old_desc_blk, | |
1951 | &new_desc_blk, 0); | |
74128f8d TT |
1952 | if (fs->super->s_feature_incompat & |
1953 | EXT2_FEATURE_INCOMPAT_META_BG) | |
1954 | old_desc_blocks = fs->super->s_first_meta_bg; | |
1955 | else | |
1956 | old_desc_blocks = fs->desc_blocks + | |
1957 | fs->super->s_reserved_gdt_blocks; | |
052db4b7 TT |
1958 | } |
1959 | } | |
1773c87c | 1960 | total_blocks_free = C2B(total_blocks_free); |
2279fd78 | 1961 | ext2fs_free_blocks_count_set(fs->super, total_blocks_free); |
efc6f628 | 1962 | |
052db4b7 TT |
1963 | /* |
1964 | * Next, calculate the inode statistics | |
1965 | */ | |
1966 | group_free = 0; | |
052db4b7 TT |
1967 | count = 0; |
1968 | group = 0; | |
5830d6be ES |
1969 | |
1970 | /* Protect loop from wrap-around if s_inodes_count maxed */ | |
cd65a24e | 1971 | uninit = ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT); |
5830d6be | 1972 | for (ino = 1; ino <= fs->super->s_inodes_count && ino > 0; ino++) { |
74128f8d | 1973 | if (uninit || |
3346084b | 1974 | !ext2fs_fast_test_inode_bitmap2(fs->inode_map, ino)) { |
052db4b7 | 1975 | group_free++; |
2279fd78 | 1976 | total_inodes_free++; |
052db4b7 TT |
1977 | } |
1978 | count++; | |
1979 | if ((count == fs->super->s_inodes_per_group) || | |
1980 | (ino == fs->super->s_inodes_count)) { | |
d7cca6b0 | 1981 | ext2fs_bg_free_inodes_count_set(fs, group, group_free); |
236efede JS |
1982 | ext2fs_group_desc_csum_set(fs, group); |
1983 | group++; | |
4828bbe9 TT |
1984 | if (group >= fs->group_desc_count) |
1985 | break; | |
052db4b7 TT |
1986 | count = 0; |
1987 | group_free = 0; | |
cd65a24e | 1988 | uninit = ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT); |
052db4b7 TT |
1989 | } |
1990 | } | |
2279fd78 | 1991 | fs->super->s_free_inodes_count = total_inodes_free; |
052db4b7 TT |
1992 | ext2fs_mark_super_dirty(fs); |
1993 | return 0; | |
1994 | } | |
199ddaaa | 1995 | |
8a6ede8b ES |
1996 | /* |
1997 | * Journal may have been relocated; update the backup journal blocks | |
1998 | * in the superblock. | |
1999 | */ | |
2000 | static errcode_t fix_sb_journal_backup(ext2_filsys fs) | |
2001 | { | |
2002 | errcode_t retval; | |
2003 | struct ext2_inode inode; | |
2004 | ||
2005 | if (!(fs->super->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)) | |
2006 | return 0; | |
2007 | ||
d93d5bbf ES |
2008 | /* External journal? Nothing to do. */ |
2009 | if (fs->super->s_journal_dev && !fs->super->s_journal_inum) | |
2010 | return 0; | |
2011 | ||
8a6ede8b ES |
2012 | retval = ext2fs_read_inode(fs, fs->super->s_journal_inum, &inode); |
2013 | if (retval) | |
2014 | return retval; | |
2015 | memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4); | |
931b58e1 | 2016 | fs->super->s_jnl_blocks[15] = inode.i_size_high; |
8a6ede8b ES |
2017 | fs->super->s_jnl_blocks[16] = inode.i_size; |
2018 | fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS; | |
2019 | ext2fs_mark_super_dirty(fs); | |
2020 | return 0; | |
2021 | } | |
2022 | ||
7f820344 TT |
2023 | static int calc_group_overhead(ext2_filsys fs, blk64_t grp, |
2024 | int old_desc_blocks) | |
2025 | { | |
2026 | blk64_t super_blk, old_desc_blk, new_desc_blk; | |
2027 | int overhead; | |
2028 | ||
2029 | /* inode table blocks plus allocation bitmaps */ | |
2030 | overhead = fs->inode_blocks_per_group + 2; | |
2031 | ||
2032 | ext2fs_super_and_bgd_loc2(fs, grp, &super_blk, | |
2033 | &old_desc_blk, &new_desc_blk, 0); | |
2034 | if ((grp == 0) || super_blk) | |
2035 | overhead++; | |
2036 | if (old_desc_blk) | |
2037 | overhead += old_desc_blocks; | |
2038 | else if (new_desc_blk) | |
2039 | overhead++; | |
2040 | return overhead; | |
2041 | } | |
2042 | ||
2043 | ||
199ddaaa JB |
2044 | /* |
2045 | * calcluate the minimum number of blocks the given fs can be resized to | |
2046 | */ | |
e231f175 | 2047 | blk64_t calculate_minimum_resize_size(ext2_filsys fs, int flags) |
199ddaaa | 2048 | { |
8728d506 | 2049 | ext2_ino_t inode_count; |
e231f175 TT |
2050 | dgrp_t groups; |
2051 | blk64_t blks_needed, data_blocks; | |
8728d506 VAH |
2052 | blk64_t grp, data_needed, last_start; |
2053 | blk64_t overhead = 0; | |
7f820344 | 2054 | int old_desc_blocks; |
2884d208 PT |
2055 | int extra_groups = 0; |
2056 | int flexbg_size = 1 << fs->super->s_log_groups_per_flex; | |
199ddaaa JB |
2057 | |
2058 | /* | |
2059 | * first figure out how many group descriptors we need to | |
2060 | * handle the number of inodes we have | |
2061 | */ | |
2062 | inode_count = fs->super->s_inodes_count - | |
2063 | fs->super->s_free_inodes_count; | |
2064 | blks_needed = ext2fs_div_ceil(inode_count, | |
2065 | fs->super->s_inodes_per_group) * | |
2066 | EXT2_BLOCKS_PER_GROUP(fs->super); | |
8728d506 VAH |
2067 | groups = ext2fs_div64_ceil(blks_needed, |
2068 | EXT2_BLOCKS_PER_GROUP(fs->super)); | |
e231f175 TT |
2069 | #ifdef RESIZE2FS_DEBUG |
2070 | if (flags & RESIZE_DEBUG_MIN_CALC) | |
2071 | printf("fs has %d inodes, %d groups required.\n", | |
2072 | inode_count, groups); | |
2073 | #endif | |
199ddaaa JB |
2074 | |
2075 | /* | |
7f820344 | 2076 | * number of old-style block group descriptor blocks |
199ddaaa | 2077 | */ |
7f820344 TT |
2078 | if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG) |
2079 | old_desc_blocks = fs->super->s_first_meta_bg; | |
2080 | else | |
2081 | old_desc_blocks = fs->desc_blocks + | |
2082 | fs->super->s_reserved_gdt_blocks; | |
199ddaaa JB |
2083 | |
2084 | /* calculate how many blocks are needed for data */ | |
4efbac6f VAH |
2085 | data_needed = ext2fs_blocks_count(fs->super) - |
2086 | ext2fs_free_blocks_count(fs->super); | |
199ddaaa | 2087 | |
7f820344 TT |
2088 | for (grp = 0; grp < fs->group_desc_count; grp++) |
2089 | data_needed -= calc_group_overhead(fs, grp, old_desc_blocks); | |
e231f175 TT |
2090 | #ifdef RESIZE2FS_DEBUG |
2091 | if (flags & RESIZE_DEBUG_MIN_CALC) | |
2092 | printf("fs requires %llu data blocks.\n", data_needed); | |
2093 | #endif | |
7f820344 TT |
2094 | |
2095 | /* | |
2096 | * For ext4 we need to allow for up to a flex_bg worth of | |
2097 | * inode tables of slack space so the resize operation can be | |
2098 | * guaranteed to finish. | |
2099 | */ | |
c09043f1 | 2100 | if (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_FLEX_BG) { |
c09043f1 | 2101 | extra_groups = flexbg_size - (groups & (flexbg_size - 1)); |
7f820344 | 2102 | data_needed += fs->inode_blocks_per_group * extra_groups; |
2884d208 | 2103 | extra_groups = groups % flexbg_size; |
c09043f1 TT |
2104 | } |
2105 | ||
199ddaaa JB |
2106 | /* |
2107 | * figure out how many data blocks we have given the number of groups | |
2108 | * we need for our inodes | |
2109 | */ | |
2110 | data_blocks = groups * EXT2_BLOCKS_PER_GROUP(fs->super); | |
2111 | last_start = 0; | |
2112 | for (grp = 0; grp < groups; grp++) { | |
7f820344 | 2113 | overhead = calc_group_overhead(fs, grp, old_desc_blocks); |
199ddaaa JB |
2114 | |
2115 | /* | |
2116 | * we want to keep track of how much data we can store in | |
2117 | * the groups leading up to the last group so we can determine | |
2118 | * how big the last group needs to be | |
2119 | */ | |
2120 | if (grp != (groups - 1)) | |
2121 | last_start += EXT2_BLOCKS_PER_GROUP(fs->super) - | |
2122 | overhead; | |
2123 | ||
2124 | data_blocks -= overhead; | |
2125 | } | |
e231f175 TT |
2126 | #ifdef RESIZE2FS_DEBUG |
2127 | if (flags & RESIZE_DEBUG_MIN_CALC) | |
2128 | printf("With %d group(s), we have %llu blocks available.\n", | |
2129 | groups, data_blocks); | |
2130 | #endif | |
199ddaaa JB |
2131 | |
2132 | /* | |
2133 | * if we need more group descriptors in order to accomodate our data | |
2134 | * then we need to add them here | |
2135 | */ | |
2136 | while (data_needed > data_blocks) { | |
8728d506 | 2137 | blk64_t remainder = data_needed - data_blocks; |
e231f175 | 2138 | dgrp_t extra_grps; |
199ddaaa JB |
2139 | |
2140 | /* figure out how many more groups we need for the data */ | |
8728d506 VAH |
2141 | extra_grps = ext2fs_div64_ceil(remainder, |
2142 | EXT2_BLOCKS_PER_GROUP(fs->super)); | |
199ddaaa JB |
2143 | |
2144 | data_blocks += extra_grps * EXT2_BLOCKS_PER_GROUP(fs->super); | |
2145 | ||
2146 | /* ok we have to account for the last group */ | |
7f820344 | 2147 | overhead = calc_group_overhead(fs, groups-1, old_desc_blocks); |
199ddaaa JB |
2148 | last_start += EXT2_BLOCKS_PER_GROUP(fs->super) - overhead; |
2149 | ||
2150 | for (grp = groups; grp < groups+extra_grps; grp++) { | |
7f820344 TT |
2151 | overhead = calc_group_overhead(fs, grp, |
2152 | old_desc_blocks); | |
199ddaaa JB |
2153 | |
2154 | /* | |
2155 | * again, we need to see how much data we cram into | |
2156 | * all of the groups leading up to the last group | |
2157 | */ | |
2158 | if (grp != (groups + extra_grps - 1)) | |
2159 | last_start += EXT2_BLOCKS_PER_GROUP(fs->super) | |
2160 | - overhead; | |
2161 | ||
2162 | data_blocks -= overhead; | |
2163 | } | |
2164 | ||
2165 | groups += extra_grps; | |
2884d208 PT |
2166 | extra_groups += extra_grps; |
2167 | if (fs->super->s_feature_incompat | |
2168 | & EXT4_FEATURE_INCOMPAT_FLEX_BG | |
2169 | && extra_groups > flexbg_size) { | |
2170 | /* | |
2171 | * For ext4 we need to allow for up to a flex_bg worth | |
2172 | * of inode tables of slack space so the resize | |
2173 | * operation can be guaranteed to finish. | |
2174 | */ | |
2175 | extra_groups = flexbg_size - | |
2176 | (groups & (flexbg_size - 1)); | |
7f820344 TT |
2177 | data_needed += (fs->inode_blocks_per_group * |
2178 | extra_groups); | |
2884d208 PT |
2179 | extra_groups = groups % flexbg_size; |
2180 | } | |
e231f175 TT |
2181 | #ifdef RESIZE2FS_DEBUG |
2182 | if (flags & RESIZE_DEBUG_MIN_CALC) | |
2183 | printf("Added %d extra group(s), " | |
2184 | "data_needed %llu, data_blocks %llu, " | |
2185 | "last_start %llu\n", | |
2186 | extra_grps, data_needed, data_blocks, | |
2187 | last_start); | |
2188 | #endif | |
199ddaaa JB |
2189 | } |
2190 | ||
2191 | /* now for the fun voodoo */ | |
7f820344 | 2192 | overhead = calc_group_overhead(fs, groups-1, old_desc_blocks); |
e231f175 TT |
2193 | #ifdef RESIZE2FS_DEBUG |
2194 | if (flags & RESIZE_DEBUG_MIN_CALC) | |
2195 | printf("Last group's overhead is %llu\n", overhead); | |
2196 | #endif | |
199ddaaa JB |
2197 | |
2198 | /* | |
2199 | * if this is the case then the last group is going to have data in it | |
2200 | * so we need to adjust the size of the last group accordingly | |
2201 | */ | |
2202 | if (last_start < data_needed) { | |
8728d506 | 2203 | blk64_t remainder = data_needed - last_start; |
199ddaaa | 2204 | |
e231f175 TT |
2205 | #ifdef RESIZE2FS_DEBUG |
2206 | if (flags & RESIZE_DEBUG_MIN_CALC) | |
2207 | printf("Need %llu data blocks in last group\n", | |
2208 | remainder); | |
2209 | #endif | |
199ddaaa JB |
2210 | /* |
2211 | * 50 is a magic number that mkfs/resize uses to see if its | |
2212 | * even worth making/resizing the fs. basically you need to | |
2213 | * have at least 50 blocks in addition to the blocks needed | |
2214 | * for the metadata in the last group | |
2215 | */ | |
2216 | if (remainder > 50) | |
2217 | overhead += remainder; | |
2218 | else | |
2219 | overhead += 50; | |
2220 | } else | |
2221 | overhead += 50; | |
2222 | ||
ba8bfa1a | 2223 | overhead += fs->super->s_first_data_block; |
e231f175 TT |
2224 | #ifdef RESIZE2FS_DEBUG |
2225 | if (flags & RESIZE_DEBUG_MIN_CALC) | |
2226 | printf("Final size of last group is %lld\n", overhead); | |
2227 | #endif | |
199ddaaa JB |
2228 | |
2229 | /* | |
2230 | * since our last group doesn't have to be BLOCKS_PER_GROUP large, we | |
2231 | * only do groups-1, and then add the number of blocks needed to | |
2232 | * handle the group descriptor metadata+data that we need | |
2233 | */ | |
2234 | blks_needed = (groups-1) * EXT2_BLOCKS_PER_GROUP(fs->super); | |
2235 | blks_needed += overhead; | |
2236 | ||
2215293c TT |
2237 | /* |
2238 | * Make sure blks_needed covers the end of the inode table in | |
2239 | * the last block group. | |
2240 | */ | |
2241 | overhead = ext2fs_inode_table_loc(fs, groups-1) + | |
2242 | fs->inode_blocks_per_group; | |
2243 | if (blks_needed < overhead) | |
2244 | blks_needed = overhead; | |
2245 | ||
e231f175 TT |
2246 | #ifdef RESIZE2FS_DEBUG |
2247 | if (flags & RESIZE_DEBUG_MIN_CALC) | |
2248 | printf("Estimated blocks needed: %llu\n", blks_needed); | |
2249 | #endif | |
2250 | ||
69f7c80e ES |
2251 | /* |
2252 | * If at this point we've already added up more "needed" than | |
2253 | * the current size, just return current size as minimum. | |
2254 | */ | |
4efbac6f VAH |
2255 | if (blks_needed >= ext2fs_blocks_count(fs->super)) |
2256 | return ext2fs_blocks_count(fs->super); | |
793a04a0 TT |
2257 | /* |
2258 | * We need to reserve a few extra blocks if extents are | |
2259 | * enabled, in case we need to grow the extent tree. The more | |
2260 | * we shrink the file system, the more space we need. | |
2261 | */ | |
e231f175 TT |
2262 | if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) { |
2263 | blk64_t safe_margin = (ext2fs_blocks_count(fs->super) - | |
2264 | blks_needed)/500; | |
2265 | #ifdef RESIZE2FS_DEBUG | |
2266 | if (flags & RESIZE_DEBUG_MIN_CALC) | |
2267 | printf("Extents safety margin: %llu\n", safe_margin); | |
2268 | #endif | |
2269 | blks_needed += safe_margin; | |
2270 | } | |
793a04a0 | 2271 | |
199ddaaa JB |
2272 | return blks_needed; |
2273 | } |