2 * resize2fs.c --- ext2 main routine
4 * Copyright (C) 1997, 1998 by Theodore Ts'o and
7 * Copyright (C) 1999, 2000 by Theodore Ts'o
10 * This file may be redistributed under the terms of the GNU Public
16 * Resizing a filesystem consists of the following phases:
18 * 1. Adjust superblock and write out new parts of the inode
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
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.
37 #include "resize2fs.h"
40 #ifdef __linux__ /* Kludge for debugging */
41 #define RESIZE2FS_DEBUG
44 static void fix_uninit_block_bitmaps(ext2_filsys fs
);
45 static errcode_t
adjust_superblock(ext2_resize_t rfs
, blk64_t new_size
);
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
);
51 static errcode_t
fix_resize_inode(ext2_filsys fs
);
52 static errcode_t
resize2fs_calculate_summary_stats(ext2_filsys fs
);
53 static errcode_t
fix_sb_journal_backup(ext2_filsys fs
);
54 static errcode_t
mark_table_blocks(ext2_filsys fs
,
55 ext2fs_block_bitmap bmap
);
56 static errcode_t
clear_sparse_super2_last_group(ext2_resize_t rfs
);
57 static errcode_t
reserve_sparse_super2_last_group(ext2_resize_t rfs
,
58 ext2fs_block_bitmap meta_bmap
);
59 static errcode_t
resize_group_descriptors(ext2_resize_t rfs
, blk64_t new_size
);
60 static errcode_t
move_bg_metadata(ext2_resize_t rfs
);
61 static errcode_t
zero_high_bits_in_inodes(ext2_resize_t rfs
);
64 * Some helper functions to check if a block is in a metadata area
66 static inline int is_block_bm(ext2_filsys fs
, unsigned int grp
, blk64_t blk
)
68 return blk
== ext2fs_block_bitmap_loc(fs
, grp
);
71 static inline int is_inode_bm(ext2_filsys fs
, unsigned int grp
, blk64_t blk
)
73 return blk
== ext2fs_inode_bitmap_loc(fs
, grp
);
76 static int is_inode_tb(ext2_filsys fs
, unsigned int grp
, blk64_t blk
)
78 return blk
>= ext2fs_inode_table_loc(fs
, grp
) &&
79 blk
< (ext2fs_inode_table_loc(fs
, grp
) +
80 fs
->inode_blocks_per_group
);
83 /* Some bigalloc helper macros which are more succinct... */
84 #define B2C(x) EXT2FS_B2C(fs, (x))
85 #define C2B(x) EXT2FS_C2B(fs, (x))
86 #define EQ_CLSTR(x, y) (B2C(x) == B2C(y))
87 #define LE_CLSTR(x, y) (B2C(x) <= B2C(y))
88 #define LT_CLSTR(x, y) (B2C(x) < B2C(y))
89 #define GE_CLSTR(x, y) (B2C(x) >= B2C(y))
90 #define GT_CLSTR(x, y) (B2C(x) > B2C(y))
92 static int lazy_itable_init
;
95 * This is the top-level routine which does the dirty deed....
97 errcode_t
resize_fs(ext2_filsys fs
, blk64_t
*new_size
, int flags
,
98 errcode_t (*progress
)(ext2_resize_t rfs
, int pass
,
100 unsigned long max_val
))
104 struct resource_track rtrack
, overall_track
;
107 * Create the data structure
109 retval
= ext2fs_get_mem(sizeof(struct ext2_resize_struct
), &rfs
);
113 memset(rfs
, 0, sizeof(struct ext2_resize_struct
));
118 rfs
->progress
= progress
;
120 init_resource_track(&overall_track
, "overall resize2fs", fs
->io
);
121 init_resource_track(&rtrack
, "read_bitmaps", fs
->io
);
122 retval
= ext2fs_read_bitmaps(fs
);
125 print_resource_track(rfs
, &rtrack
, fs
->io
);
127 fs
->super
->s_state
|= EXT2_ERROR_FS
;
128 ext2fs_mark_super_dirty(fs
);
131 init_resource_track(&rtrack
, "fix_uninit_block_bitmaps 1", fs
->io
);
132 fix_uninit_block_bitmaps(fs
);
133 print_resource_track(rfs
, &rtrack
, fs
->io
);
134 retval
= ext2fs_dup_handle(fs
, &rfs
->new_fs
);
138 init_resource_track(&rtrack
, "resize_group_descriptors", fs
->io
);
139 retval
= resize_group_descriptors(rfs
, *new_size
);
142 print_resource_track(rfs
, &rtrack
, fs
->io
);
144 init_resource_track(&rtrack
, "move_bg_metadata", fs
->io
);
145 retval
= move_bg_metadata(rfs
);
148 print_resource_track(rfs
, &rtrack
, fs
->io
);
150 init_resource_track(&rtrack
, "zero_high_bits_in_metadata", fs
->io
);
151 retval
= zero_high_bits_in_inodes(rfs
);
154 print_resource_track(rfs
, &rtrack
, fs
->io
);
156 init_resource_track(&rtrack
, "adjust_superblock", fs
->io
);
157 retval
= adjust_superblock(rfs
, *new_size
);
160 print_resource_track(rfs
, &rtrack
, fs
->io
);
162 init_resource_track(&rtrack
, "fix_uninit_block_bitmaps 2", fs
->io
);
163 fix_uninit_block_bitmaps(rfs
->new_fs
);
164 print_resource_track(rfs
, &rtrack
, fs
->io
);
165 /* Clear the block bitmap uninit flag for the last block group */
166 ext2fs_bg_flags_clear(rfs
->new_fs
, rfs
->new_fs
->group_desc_count
- 1,
167 EXT2_BG_BLOCK_UNINIT
);
169 *new_size
= ext2fs_blocks_count(rfs
->new_fs
->super
);
171 init_resource_track(&rtrack
, "blocks_to_move", fs
->io
);
172 retval
= blocks_to_move(rfs
);
175 print_resource_track(rfs
, &rtrack
, fs
->io
);
177 #ifdef RESIZE2FS_DEBUG
178 if (rfs
->flags
& RESIZE_DEBUG_BMOVE
)
179 printf("Number of free blocks: %llu/%llu, Needed: %llu\n",
180 (unsigned long long) ext2fs_free_blocks_count(rfs
->old_fs
->super
),
181 (unsigned long long) ext2fs_free_blocks_count(rfs
->new_fs
->super
),
182 (unsigned long long) rfs
->needed_blocks
);
185 init_resource_track(&rtrack
, "block_mover", fs
->io
);
186 retval
= block_mover(rfs
);
189 print_resource_track(rfs
, &rtrack
, fs
->io
);
191 init_resource_track(&rtrack
, "inode_scan_and_fix", fs
->io
);
192 retval
= inode_scan_and_fix(rfs
);
195 print_resource_track(rfs
, &rtrack
, fs
->io
);
197 init_resource_track(&rtrack
, "inode_ref_fix", fs
->io
);
198 retval
= inode_ref_fix(rfs
);
201 print_resource_track(rfs
, &rtrack
, fs
->io
);
203 init_resource_track(&rtrack
, "move_itables", fs
->io
);
204 retval
= move_itables(rfs
);
207 print_resource_track(rfs
, &rtrack
, fs
->io
);
209 retval
= clear_sparse_super2_last_group(rfs
);
213 init_resource_track(&rtrack
, "calculate_summary_stats", fs
->io
);
214 retval
= resize2fs_calculate_summary_stats(rfs
->new_fs
);
217 print_resource_track(rfs
, &rtrack
, fs
->io
);
219 init_resource_track(&rtrack
, "fix_resize_inode", fs
->io
);
220 retval
= fix_resize_inode(rfs
->new_fs
);
223 print_resource_track(rfs
, &rtrack
, fs
->io
);
225 init_resource_track(&rtrack
, "fix_sb_journal_backup", fs
->io
);
226 retval
= fix_sb_journal_backup(rfs
->new_fs
);
229 print_resource_track(rfs
, &rtrack
, fs
->io
);
231 retval
= ext2fs_set_gdt_csum(rfs
->new_fs
);
235 rfs
->new_fs
->super
->s_state
&= ~EXT2_ERROR_FS
;
236 rfs
->new_fs
->flags
&= ~EXT2_FLAG_MASTER_SB_ONLY
;
238 print_resource_track(rfs
, &overall_track
, fs
->io
);
239 retval
= ext2fs_close_free(&rfs
->new_fs
);
245 ext2fs_free(rfs
->old_fs
);
248 ext2fs_free_mem(&rfs
->itable_buf
);
249 if (rfs
->reserve_blocks
)
250 ext2fs_free_block_bitmap(rfs
->reserve_blocks
);
251 if (rfs
->move_blocks
)
252 ext2fs_free_block_bitmap(rfs
->move_blocks
);
253 ext2fs_free_mem(&rfs
);
259 ext2fs_free(rfs
->new_fs
);
263 ext2fs_free_mem(&rfs
->itable_buf
);
264 ext2fs_free_mem(&rfs
);
268 /* Keep the size of the group descriptor region constant */
269 static void adjust_reserved_gdt_blocks(ext2_filsys old_fs
, ext2_filsys fs
)
271 if (ext2fs_has_feature_resize_inode(fs
->super
) &&
272 (old_fs
->desc_blocks
!= fs
->desc_blocks
)) {
275 new = ((int) fs
->super
->s_reserved_gdt_blocks
) +
276 (old_fs
->desc_blocks
- fs
->desc_blocks
);
279 if (new > (int) fs
->blocksize
/4)
280 new = fs
->blocksize
/4;
281 fs
->super
->s_reserved_gdt_blocks
= new;
285 /* Toggle 64bit mode */
286 static errcode_t
resize_group_descriptors(ext2_resize_t rfs
, blk64_t new_size
)
288 void *o
, *n
, *new_group_desc
;
293 if (!(rfs
->flags
& (RESIZE_DISABLE_64BIT
| RESIZE_ENABLE_64BIT
)))
296 if (new_size
!= ext2fs_blocks_count(rfs
->new_fs
->super
) ||
297 ext2fs_blocks_count(rfs
->new_fs
->super
) >= (1ULL << 32) ||
298 (rfs
->flags
& RESIZE_DISABLE_64BIT
&&
299 rfs
->flags
& RESIZE_ENABLE_64BIT
))
300 return EXT2_ET_INVALID_ARGUMENT
;
302 if (rfs
->flags
& RESIZE_DISABLE_64BIT
) {
303 ext2fs_clear_feature_64bit(rfs
->new_fs
->super
);
304 rfs
->new_fs
->super
->s_desc_size
= EXT2_MIN_DESC_SIZE
;
305 } else if (rfs
->flags
& RESIZE_ENABLE_64BIT
) {
306 ext2fs_set_feature_64bit(rfs
->new_fs
->super
);
307 rfs
->new_fs
->super
->s_desc_size
= EXT2_MIN_DESC_SIZE_64BIT
;
310 if (EXT2_DESC_SIZE(rfs
->old_fs
->super
) ==
311 EXT2_DESC_SIZE(rfs
->new_fs
->super
))
314 o
= rfs
->new_fs
->group_desc
;
315 rfs
->new_fs
->desc_blocks
= ext2fs_div_ceil(
316 rfs
->old_fs
->group_desc_count
,
317 EXT2_DESC_PER_BLOCK(rfs
->new_fs
->super
));
318 retval
= ext2fs_get_arrayzero(rfs
->new_fs
->desc_blocks
,
319 rfs
->old_fs
->blocksize
, &new_group_desc
);
325 if (EXT2_DESC_SIZE(rfs
->old_fs
->super
) <=
326 EXT2_DESC_SIZE(rfs
->new_fs
->super
))
327 copy_size
= EXT2_DESC_SIZE(rfs
->old_fs
->super
);
329 copy_size
= EXT2_DESC_SIZE(rfs
->new_fs
->super
);
330 for (i
= 0; i
< rfs
->old_fs
->group_desc_count
; i
++) {
331 memcpy(n
, o
, copy_size
);
332 n
= (char *)n
+ EXT2_DESC_SIZE(rfs
->new_fs
->super
);
333 o
= (char *)o
+ EXT2_DESC_SIZE(rfs
->old_fs
->super
);
336 ext2fs_free_mem(&rfs
->new_fs
->group_desc
);
337 rfs
->new_fs
->group_desc
= new_group_desc
;
339 for (i
= 0; i
< rfs
->old_fs
->group_desc_count
; i
++)
340 ext2fs_group_desc_csum_set(rfs
->new_fs
, i
);
342 adjust_reserved_gdt_blocks(rfs
->old_fs
, rfs
->new_fs
);
347 /* Move bitmaps/inode tables out of the way. */
348 static errcode_t
move_bg_metadata(ext2_resize_t rfs
)
351 blk64_t b
, c
, d
, old_desc_blocks
, new_desc_blocks
, j
;
352 ext2fs_block_bitmap old_map
, new_map
;
357 if (!(rfs
->flags
& (RESIZE_DISABLE_64BIT
| RESIZE_ENABLE_64BIT
)))
360 retval
= ext2fs_allocate_block_bitmap(rfs
->old_fs
, "oldfs", &old_map
);
364 retval
= ext2fs_allocate_block_bitmap(rfs
->new_fs
, "newfs", &new_map
);
368 if (ext2fs_has_feature_meta_bg(rfs
->old_fs
->super
)) {
369 old_desc_blocks
= rfs
->old_fs
->super
->s_first_meta_bg
;
370 new_desc_blocks
= rfs
->new_fs
->super
->s_first_meta_bg
;
372 old_desc_blocks
= rfs
->old_fs
->desc_blocks
+
373 rfs
->old_fs
->super
->s_reserved_gdt_blocks
;
374 new_desc_blocks
= rfs
->new_fs
->desc_blocks
+
375 rfs
->new_fs
->super
->s_reserved_gdt_blocks
;
378 /* Construct bitmaps of super/descriptor blocks in old and new fs */
379 for (i
= 0; i
< rfs
->old_fs
->group_desc_count
; i
++) {
380 retval
= ext2fs_super_and_bgd_loc2(rfs
->old_fs
, i
, &b
, &c
, &d
,
385 ext2fs_mark_block_bitmap2(old_map
, b
);
386 for (j
= 0; c
!= 0 && j
< old_desc_blocks
; j
++)
387 ext2fs_mark_block_bitmap2(old_map
, c
+ j
);
389 ext2fs_mark_block_bitmap2(old_map
, d
);
391 retval
= ext2fs_super_and_bgd_loc2(rfs
->new_fs
, i
, &b
, &c
, &d
,
396 ext2fs_mark_block_bitmap2(new_map
, b
);
397 for (j
= 0; c
!= 0 && j
< new_desc_blocks
; j
++)
398 ext2fs_mark_block_bitmap2(new_map
, c
+ j
);
400 ext2fs_mark_block_bitmap2(new_map
, d
);
403 cluster_ratio
= EXT2FS_CLUSTER_RATIO(rfs
->new_fs
);
405 /* Find changes in block allocations for bg metadata */
406 for (b
= EXT2FS_B2C(rfs
->old_fs
,
407 rfs
->old_fs
->super
->s_first_data_block
);
408 b
< ext2fs_blocks_count(rfs
->new_fs
->super
);
409 b
+= cluster_ratio
) {
410 old
= ext2fs_test_block_bitmap2(old_map
, b
);
411 new = ext2fs_test_block_bitmap2(new_map
, b
);
414 /* mark old_map, unmark new_map */
415 if (cluster_ratio
== 1)
416 ext2fs_unmark_block_bitmap2(
417 rfs
->new_fs
->block_map
, b
);
418 } else if (!old
&& new)
419 ; /* unmark old_map, mark new_map */
421 ext2fs_unmark_block_bitmap2(old_map
, b
);
422 ext2fs_unmark_block_bitmap2(new_map
, b
);
427 * new_map now shows blocks that have been newly allocated.
428 * old_map now shows blocks that have been newly freed.
432 * Move any conflicting bitmaps and inode tables. Ensure that we
433 * don't try to free clusters associated with bitmaps or tables.
435 for (i
= 0; i
< rfs
->old_fs
->group_desc_count
; i
++) {
436 b
= ext2fs_block_bitmap_loc(rfs
->new_fs
, i
);
437 if (ext2fs_test_block_bitmap2(new_map
, b
))
438 ext2fs_block_bitmap_loc_set(rfs
->new_fs
, i
, 0);
439 else if (ext2fs_test_block_bitmap2(old_map
, b
))
440 ext2fs_unmark_block_bitmap2(old_map
, b
);
442 b
= ext2fs_inode_bitmap_loc(rfs
->new_fs
, i
);
443 if (ext2fs_test_block_bitmap2(new_map
, b
))
444 ext2fs_inode_bitmap_loc_set(rfs
->new_fs
, i
, 0);
445 else if (ext2fs_test_block_bitmap2(old_map
, b
))
446 ext2fs_unmark_block_bitmap2(old_map
, b
);
448 c
= ext2fs_inode_table_loc(rfs
->new_fs
, i
);
450 b
< rfs
->new_fs
->inode_blocks_per_group
;
452 if (ext2fs_test_block_bitmap2(new_map
, b
+ c
))
453 ext2fs_inode_table_loc_set(rfs
->new_fs
, i
, 0);
454 else if (ext2fs_test_block_bitmap2(old_map
, b
+ c
))
455 ext2fs_unmark_block_bitmap2(old_map
, b
+ c
);
459 /* Free unused clusters */
461 cluster_ratio
> 1 && b
< ext2fs_blocks_count(rfs
->new_fs
->super
);
463 if (ext2fs_test_block_bitmap2(old_map
, b
))
464 ext2fs_unmark_block_bitmap2(rfs
->new_fs
->block_map
, b
);
467 ext2fs_free_block_bitmap(old_map
);
469 ext2fs_free_block_bitmap(new_map
);
473 /* Zero out the high bits of extent fields */
474 static errcode_t
zero_high_bits_in_extents(ext2_filsys fs
, ext2_ino_t ino
,
475 struct ext2_inode
*inode
)
477 ext2_extent_handle_t handle
;
478 struct ext2fs_extent extent
;
479 int op
= EXT2_EXTENT_ROOT
;
482 if (!(inode
->i_flags
& EXT4_EXTENTS_FL
))
485 errcode
= ext2fs_extent_open(fs
, ino
, &handle
);
490 errcode
= ext2fs_extent_get(handle
, op
, &extent
);
494 op
= EXT2_EXTENT_NEXT_SIB
;
496 if (extent
.e_pblk
> (1ULL << 32)) {
497 extent
.e_pblk
&= (1ULL << 32) - 1;
498 errcode
= ext2fs_extent_replace(handle
, 0, &extent
);
504 /* Ok if we run off the end */
505 if (errcode
== EXT2_ET_EXTENT_NO_NEXT
)
507 ext2fs_extent_free(handle
);
511 /* Zero out the high bits of inodes. */
512 static errcode_t
zero_high_bits_in_inodes(ext2_resize_t rfs
)
514 ext2_filsys fs
= rfs
->old_fs
;
515 int length
= EXT2_INODE_SIZE(fs
->super
);
516 struct ext2_inode
*inode
= NULL
;
517 ext2_inode_scan scan
= NULL
;
521 if (!(rfs
->flags
& (RESIZE_DISABLE_64BIT
| RESIZE_ENABLE_64BIT
)))
524 if (fs
->super
->s_creator_os
== EXT2_OS_HURD
)
527 retval
= ext2fs_open_inode_scan(fs
, 0, &scan
);
531 retval
= ext2fs_get_mem(length
, &inode
);
536 retval
= ext2fs_get_next_inode_full(scan
, &ino
, inode
, length
);
541 if (!ext2fs_test_inode_bitmap2(fs
->inode_map
, ino
))
545 * Here's how we deal with high block number fields:
547 * - i_size_high has been been written out with i_size_lo
548 * since the ext2 days, so no conversion is needed.
550 * - i_blocks_hi is guarded by both the huge_file feature and
551 * inode flags and has always been written out with
552 * i_blocks_lo if the feature is set. The field is only
553 * ever read if both feature and inode flag are set, so
554 * we don't need to zero it now.
556 * - i_file_acl_high can be uninitialized, so zero it if
559 if (inode
->osd2
.linux2
.l_i_file_acl_high
) {
560 inode
->osd2
.linux2
.l_i_file_acl_high
= 0;
561 retval
= ext2fs_write_inode_full(fs
, ino
, inode
,
567 retval
= zero_high_bits_in_extents(fs
, ino
, inode
);
574 ext2fs_free_mem(&inode
);
576 ext2fs_close_inode_scan(scan
);
581 * Clean up the bitmaps for uninitialized bitmaps
583 static void fix_uninit_block_bitmaps(ext2_filsys fs
)
589 if (!ext2fs_has_group_desc_csum(fs
))
592 for (g
=0; g
< fs
->group_desc_count
; g
++) {
593 if (!(ext2fs_bg_flags_test(fs
, g
, EXT2_BG_BLOCK_UNINIT
)))
596 blk
= ext2fs_group_first_block2(fs
, g
);
597 lblk
= ext2fs_group_last_block2(fs
, g
);
598 ext2fs_unmark_block_bitmap_range2(fs
->block_map
, blk
,
601 ext2fs_reserve_super_and_bgd(fs
, g
, fs
->block_map
);
602 ext2fs_mark_block_bitmap2(fs
->block_map
,
603 ext2fs_block_bitmap_loc(fs
, g
));
604 ext2fs_mark_block_bitmap2(fs
->block_map
,
605 ext2fs_inode_bitmap_loc(fs
, g
));
606 for (i
= 0, blk
= ext2fs_inode_table_loc(fs
, g
);
607 i
< fs
->inode_blocks_per_group
;
609 ext2fs_mark_block_bitmap2(fs
->block_map
, blk
);
613 /* --------------------------------------------------------------------
615 * Resize processing, phase 1.
617 * In this phase we adjust the in-memory superblock information, and
618 * initialize any new parts of the inode table. The new parts of the
619 * inode table are created in virgin disk space, so we can abort here
620 * without any side effects.
621 * --------------------------------------------------------------------
625 * If the group descriptor's bitmap and inode table blocks are valid,
626 * release them in the new filesystem data structure, and mark them as
627 * reserved so the old inode table blocks don't get overwritten.
629 static errcode_t
free_gdp_blocks(ext2_filsys fs
,
630 ext2fs_block_bitmap reserve_blocks
,
637 ext2fs_block_bitmap bg_map
= NULL
;
638 errcode_t retval
= 0;
639 dgrp_t count
= old_fs
->group_desc_count
- fs
->group_desc_count
;
641 /* If bigalloc, don't free metadata living in the same cluster */
642 if (EXT2FS_CLUSTER_RATIO(fs
) > 1) {
643 retval
= ext2fs_allocate_block_bitmap(fs
, "bgdata", &bg_map
);
647 retval
= mark_table_blocks(fs
, bg_map
);
652 for (i
= group
; i
< group
+ count
; i
++) {
653 blk
= ext2fs_block_bitmap_loc(old_fs
, i
);
655 (blk
< ext2fs_blocks_count(fs
->super
)) &&
656 !(bg_map
&& ext2fs_test_block_bitmap2(bg_map
, blk
))) {
657 ext2fs_block_alloc_stats2(fs
, blk
, -1);
658 ext2fs_mark_block_bitmap2(reserve_blocks
, blk
);
661 blk
= ext2fs_inode_bitmap_loc(old_fs
, i
);
663 (blk
< ext2fs_blocks_count(fs
->super
)) &&
664 !(bg_map
&& ext2fs_test_block_bitmap2(bg_map
, blk
))) {
665 ext2fs_block_alloc_stats2(fs
, blk
, -1);
666 ext2fs_mark_block_bitmap2(reserve_blocks
, blk
);
669 blk
= ext2fs_inode_table_loc(old_fs
, i
);
671 j
< fs
->inode_blocks_per_group
; j
++, blk
++) {
672 if (blk
>= ext2fs_blocks_count(fs
->super
) ||
673 (bg_map
&& ext2fs_test_block_bitmap2(bg_map
, blk
)))
675 ext2fs_block_alloc_stats2(fs
, blk
, -1);
676 ext2fs_mark_block_bitmap2(reserve_blocks
, blk
);
682 ext2fs_free_block_bitmap(bg_map
);
687 * This routine is shared by the online and offline resize routines.
688 * All of the information which is adjusted in memory is done here.
690 errcode_t
adjust_fs_info(ext2_filsys fs
, ext2_filsys old_fs
,
691 ext2fs_block_bitmap reserve_blocks
, blk64_t new_size
)
694 blk64_t overhead
= 0;
696 blk64_t blk
, group_block
;
698 blk64_t old_numblocks
, numblocks
, adjblocks
;
699 unsigned long i
, j
, old_desc_blocks
;
700 unsigned int meta_bg
, meta_bg_size
;
701 int has_super
, csum_flag
, has_bg
;
702 unsigned long long new_inodes
; /* u64 to check for overflow */
705 ext2fs_blocks_count_set(fs
->super
, new_size
);
706 fs
->super
->s_overhead_clusters
= 0;
709 fs
->group_desc_count
= ext2fs_div64_ceil(ext2fs_blocks_count(fs
->super
) -
710 fs
->super
->s_first_data_block
,
711 EXT2_BLOCKS_PER_GROUP(fs
->super
));
712 if (fs
->group_desc_count
== 0)
713 return EXT2_ET_TOOSMALL
;
714 fs
->desc_blocks
= ext2fs_div_ceil(fs
->group_desc_count
,
715 EXT2_DESC_PER_BLOCK(fs
->super
));
718 * Overhead is the number of bookkeeping blocks per group. It
719 * includes the superblock backup, the group descriptor
720 * backups, the inode bitmap, the block bitmap, and the inode
723 overhead
= (int) (2 + fs
->inode_blocks_per_group
);
726 if (ext2fs_has_feature_sparse_super2(fs
->super
)) {
728 * We have to do this manually since
729 * super->s_backup_bgs hasn't been set up yet.
731 if (fs
->group_desc_count
== 2)
732 has_bg
= fs
->super
->s_backup_bgs
[0] != 0;
734 has_bg
= fs
->super
->s_backup_bgs
[1] != 0;
736 has_bg
= ext2fs_bg_has_super(fs
, fs
->group_desc_count
- 1);
738 overhead
+= 1 + fs
->desc_blocks
+
739 fs
->super
->s_reserved_gdt_blocks
;
742 * See if the last group is big enough to support the
743 * necessary data structures. If not, we need to get rid of
746 rem
= (ext2fs_blocks_count(fs
->super
) - fs
->super
->s_first_data_block
) %
747 fs
->super
->s_blocks_per_group
;
748 if ((fs
->group_desc_count
== 1) && rem
&& (rem
< overhead
))
749 return EXT2_ET_TOOSMALL
;
750 if ((fs
->group_desc_count
> 1) && rem
&& (rem
< overhead
+50)) {
751 ext2fs_blocks_count_set(fs
->super
,
752 ext2fs_blocks_count(fs
->super
) - rem
);
756 * Adjust the number of inodes
758 new_inodes
=(unsigned long long) fs
->super
->s_inodes_per_group
* fs
->group_desc_count
;
759 if (new_inodes
> ~0U) {
760 new_inodes
= (unsigned long long) fs
->super
->s_inodes_per_group
* (fs
->group_desc_count
- 1);
761 if (new_inodes
<= ~0U) {
762 unsigned long long new_blocks
=
763 ((unsigned long long) fs
->super
->s_blocks_per_group
*
764 (fs
->group_desc_count
- 1)) + fs
->super
->s_first_data_block
;
766 ext2fs_blocks_count_set(fs
->super
, new_blocks
);
769 fprintf(stderr
, _("inodes (%llu) must be less than %u\n"),
770 (unsigned long long) new_inodes
, ~0U);
771 return EXT2_ET_TOO_MANY_INODES
;
773 fs
->super
->s_inodes_count
= fs
->super
->s_inodes_per_group
*
774 fs
->group_desc_count
;
777 * Adjust the number of free blocks
779 blk
= ext2fs_blocks_count(old_fs
->super
);
780 if (blk
> ext2fs_blocks_count(fs
->super
))
781 ext2fs_free_blocks_count_set(fs
->super
,
782 ext2fs_free_blocks_count(fs
->super
) -
783 (blk
- ext2fs_blocks_count(fs
->super
)));
785 ext2fs_free_blocks_count_set(fs
->super
,
786 ext2fs_free_blocks_count(fs
->super
) +
787 (ext2fs_blocks_count(fs
->super
) - blk
));
790 * Adjust the number of reserved blocks
792 percent
= (ext2fs_r_blocks_count(old_fs
->super
) * 100.0) /
793 ext2fs_blocks_count(old_fs
->super
);
794 ext2fs_r_blocks_count_set(fs
->super
,
795 (percent
* ext2fs_blocks_count(fs
->super
) /
799 * Adjust the bitmaps for size
801 retval
= ext2fs_resize_inode_bitmap2(fs
->super
->s_inodes_count
,
802 fs
->super
->s_inodes_count
,
804 if (retval
) goto errout
;
806 real_end
= EXT2_GROUPS_TO_BLOCKS(fs
->super
, fs
->group_desc_count
) - 1 +
807 fs
->super
->s_first_data_block
;
808 retval
= ext2fs_resize_block_bitmap2(new_size
- 1,
809 real_end
, fs
->block_map
);
810 if (retval
) goto errout
;
813 * If we are growing the file system, also grow the size of
814 * the reserve_blocks bitmap
816 if (reserve_blocks
&& new_size
> ext2fs_blocks_count(old_fs
->super
)) {
817 retval
= ext2fs_resize_block_bitmap2(new_size
- 1,
818 real_end
, reserve_blocks
);
819 if (retval
) goto errout
;
823 * Reallocate the group descriptors as necessary.
825 if (EXT2_DESC_SIZE(old_fs
->super
) == EXT2_DESC_SIZE(fs
->super
) &&
826 old_fs
->desc_blocks
!= fs
->desc_blocks
) {
827 retval
= ext2fs_resize_mem(old_fs
->desc_blocks
*
829 fs
->desc_blocks
* fs
->blocksize
,
833 if (fs
->desc_blocks
> old_fs
->desc_blocks
)
834 memset((char *) fs
->group_desc
+
835 (old_fs
->desc_blocks
* fs
->blocksize
), 0,
836 (fs
->desc_blocks
- old_fs
->desc_blocks
) *
841 * If the resize_inode feature is set, and we are changing the
842 * number of descriptor blocks, then adjust
843 * s_reserved_gdt_blocks if possible to avoid needing to move
844 * the inode table either now or in the future.
846 * Note: If we're converting to 64bit mode, we did this earlier.
848 if (EXT2_DESC_SIZE(old_fs
->super
) == EXT2_DESC_SIZE(fs
->super
))
849 adjust_reserved_gdt_blocks(old_fs
, fs
);
851 if (ext2fs_has_feature_meta_bg(fs
->super
) &&
852 (fs
->super
->s_first_meta_bg
> fs
->desc_blocks
)) {
853 ext2fs_clear_feature_meta_bg(fs
->super
);
854 fs
->super
->s_first_meta_bg
= 0;
858 * Update the location of the backup superblocks if the
859 * sparse_super2 feature is enabled.
861 if (ext2fs_has_feature_sparse_super2(fs
->super
)) {
862 dgrp_t last_bg
= fs
->group_desc_count
- 1;
863 dgrp_t old_last_bg
= old_fs
->group_desc_count
- 1;
865 if (last_bg
> old_last_bg
) {
866 if (old_fs
->group_desc_count
== 1)
867 fs
->super
->s_backup_bgs
[0] = 1;
868 if ((old_fs
->group_desc_count
< 3 &&
869 fs
->group_desc_count
> 2) ||
870 fs
->super
->s_backup_bgs
[1])
871 fs
->super
->s_backup_bgs
[1] = last_bg
;
872 } else if (last_bg
< old_last_bg
) {
873 if (fs
->super
->s_backup_bgs
[0] > last_bg
)
874 fs
->super
->s_backup_bgs
[0] = 0;
875 if (fs
->super
->s_backup_bgs
[1] > last_bg
)
876 fs
->super
->s_backup_bgs
[1] = 0;
878 old_fs
->super
->s_backup_bgs
[1] == old_last_bg
)
879 fs
->super
->s_backup_bgs
[1] = last_bg
;
884 * If we are shrinking the number of block groups, we're done
887 if (old_fs
->group_desc_count
> fs
->group_desc_count
) {
889 * Check the block groups that we are chopping off
890 * and free any blocks associated with their metadata
892 retval
= free_gdp_blocks(fs
, reserve_blocks
, old_fs
,
893 fs
->group_desc_count
);
898 * Fix the count of the last (old) block group
900 old_numblocks
= (ext2fs_blocks_count(old_fs
->super
) -
901 old_fs
->super
->s_first_data_block
) %
902 old_fs
->super
->s_blocks_per_group
;
904 old_numblocks
= old_fs
->super
->s_blocks_per_group
;
905 if (old_fs
->group_desc_count
== fs
->group_desc_count
) {
906 numblocks
= (ext2fs_blocks_count(fs
->super
) -
907 fs
->super
->s_first_data_block
) %
908 fs
->super
->s_blocks_per_group
;
910 numblocks
= fs
->super
->s_blocks_per_group
;
912 numblocks
= fs
->super
->s_blocks_per_group
;
913 i
= old_fs
->group_desc_count
- 1;
914 ext2fs_bg_free_blocks_count_set(fs
, i
, ext2fs_bg_free_blocks_count(fs
, i
) + (numblocks
- old_numblocks
));
915 ext2fs_group_desc_csum_set(fs
, i
);
918 * If the number of block groups is staying the same, we're
919 * done and can exit now. (If the number block groups is
920 * shrinking, we had exited earlier.)
922 if (old_fs
->group_desc_count
>= fs
->group_desc_count
) {
928 * Initialize the new block group descriptors
930 group_block
= ext2fs_group_first_block2(fs
,
931 old_fs
->group_desc_count
);
932 csum_flag
= ext2fs_has_group_desc_csum(fs
);
933 if (getenv("RESIZE2FS_FORCE_LAZY_ITABLE_INIT") ||
934 (!getenv("RESIZE2FS_FORCE_ITABLE_INIT") &&
935 access("/sys/fs/ext4/features/lazy_itable_init", F_OK
) == 0))
936 lazy_itable_init
= 1;
937 if (ext2fs_has_feature_meta_bg(fs
->super
))
938 old_desc_blocks
= fs
->super
->s_first_meta_bg
;
940 old_desc_blocks
= fs
->desc_blocks
+
941 fs
->super
->s_reserved_gdt_blocks
;
944 * If we changed the number of block_group descriptor blocks,
945 * we need to make sure they are all marked as reserved in the
946 * filesystem's block allocation map.
948 for (i
= 0; i
< old_fs
->group_desc_count
; i
++)
949 ext2fs_reserve_super_and_bgd(fs
, i
, fs
->block_map
);
951 for (i
= old_fs
->group_desc_count
;
952 i
< fs
->group_desc_count
; i
++) {
953 memset(ext2fs_group_desc(fs
, fs
->group_desc
, i
), 0,
954 sizeof(struct ext2_group_desc
));
957 ext2fs_bg_flags_zap(fs
, i
);
959 ext2fs_bg_flags_set(fs
, i
, EXT2_BG_INODE_UNINIT
);
960 if (!lazy_itable_init
)
961 ext2fs_bg_flags_set(fs
, i
,
962 EXT2_BG_INODE_ZEROED
);
963 ext2fs_bg_itable_unused_set(fs
, i
,
964 fs
->super
->s_inodes_per_group
);
967 numblocks
= ext2fs_group_blocks_count(fs
, i
);
968 if ((i
< fs
->group_desc_count
- 1) && csum_flag
)
969 ext2fs_bg_flags_set(fs
, i
, EXT2_BG_BLOCK_UNINIT
);
971 has_super
= ext2fs_bg_has_super(fs
, i
);
973 ext2fs_block_alloc_stats2(fs
, group_block
, +1);
976 meta_bg_size
= EXT2_DESC_PER_BLOCK(fs
->super
);
977 meta_bg
= i
/ meta_bg_size
;
978 if (!ext2fs_has_feature_meta_bg(fs
->super
) ||
979 (meta_bg
< fs
->super
->s_first_meta_bg
)) {
981 for (j
=0; j
< old_desc_blocks
; j
++)
982 ext2fs_block_alloc_stats2(fs
,
983 group_block
+ 1 + j
, +1);
984 adjblocks
+= old_desc_blocks
;
989 if (((i
% meta_bg_size
) == 0) ||
990 ((i
% meta_bg_size
) == 1) ||
991 ((i
% meta_bg_size
) == (meta_bg_size
-1)))
992 ext2fs_block_alloc_stats2(fs
,
993 group_block
+ has_super
, +1);
996 adjblocks
+= 2 + fs
->inode_blocks_per_group
;
998 numblocks
-= adjblocks
;
999 ext2fs_free_blocks_count_set(fs
->super
,
1000 ext2fs_free_blocks_count(fs
->super
) - adjblocks
);
1001 fs
->super
->s_free_inodes_count
+=
1002 fs
->super
->s_inodes_per_group
;
1003 ext2fs_bg_free_blocks_count_set(fs
, i
, numblocks
);
1004 ext2fs_bg_free_inodes_count_set(fs
, i
,
1005 fs
->super
->s_inodes_per_group
);
1006 ext2fs_bg_used_dirs_count_set(fs
, i
, 0);
1007 ext2fs_group_desc_csum_set(fs
, i
);
1009 retval
= ext2fs_allocate_group_table(fs
, i
, 0);
1010 if (retval
) goto errout
;
1012 group_block
+= fs
->super
->s_blocks_per_group
;
1017 * Mark all of the metadata blocks as reserved so they won't
1018 * get allocated by the call to ext2fs_allocate_group_table()
1019 * in blocks_to_move(), where we allocate new blocks to
1020 * replace those allocation bitmap and inode table blocks
1021 * which have to get relocated to make space for an increased
1022 * number of the block group descriptors.
1025 mark_table_blocks(fs
, reserve_blocks
);
1032 * Replicate the first part of adjust_fs_info to determine what the
1033 * new size of the file system should be. This allows resize2fs to
1034 * exit early if we aren't going to make any changes to the file
1037 void adjust_new_size(ext2_filsys fs
, blk64_t
*sizep
)
1039 blk64_t size
, rem
, overhead
= 0;
1040 unsigned long desc_blocks
;
1041 dgrp_t group_desc_count
;
1043 unsigned long long new_inodes
; /* u64 to check for overflow */
1047 group_desc_count
= ext2fs_div64_ceil(size
-
1048 fs
->super
->s_first_data_block
,
1049 EXT2_BLOCKS_PER_GROUP(fs
->super
));
1050 if (group_desc_count
== 0)
1052 desc_blocks
= ext2fs_div_ceil(group_desc_count
,
1053 EXT2_DESC_PER_BLOCK(fs
->super
));
1056 * Overhead is the number of bookkeeping blocks per group. It
1057 * includes the superblock backup, the group descriptor
1058 * backups, the inode bitmap, the block bitmap, and the inode
1061 overhead
= (int) (2 + fs
->inode_blocks_per_group
);
1064 if (ext2fs_has_feature_sparse_super2(fs
->super
)) {
1066 * We have to do this manually since
1067 * super->s_backup_bgs hasn't been set up yet.
1069 if (group_desc_count
== 2)
1070 has_bg
= fs
->super
->s_backup_bgs
[0] != 0;
1072 has_bg
= fs
->super
->s_backup_bgs
[1] != 0;
1074 has_bg
= ext2fs_bg_has_super(fs
, group_desc_count
- 1);
1076 overhead
+= 1 + desc_blocks
+
1077 fs
->super
->s_reserved_gdt_blocks
;
1080 * See if the last group is big enough to support the
1081 * necessary data structures. If not, we need to get rid of
1084 rem
= (size
- fs
->super
->s_first_data_block
) %
1085 fs
->super
->s_blocks_per_group
;
1086 if ((group_desc_count
== 1) && rem
&& (rem
< overhead
))
1088 if ((group_desc_count
> 1) && rem
&& (rem
< overhead
+50)) {
1094 * If we need to reduce the size by no more than a block
1095 * group to avoid overrunning the max inode limit, do it.
1097 new_inodes
=(unsigned long long) fs
->super
->s_inodes_per_group
* group_desc_count
;
1098 if (new_inodes
> ~0U) {
1099 new_inodes
= (unsigned long long) fs
->super
->s_inodes_per_group
* (group_desc_count
- 1);
1100 if (new_inodes
> ~0U)
1102 size
= ((unsigned long long) fs
->super
->s_blocks_per_group
*
1103 (group_desc_count
- 1)) + fs
->super
->s_first_data_block
;
1111 * This routine adjusts the superblock and other data structures, both
1112 * in disk as well as in memory...
1114 static errcode_t
adjust_superblock(ext2_resize_t rfs
, blk64_t new_size
)
1116 ext2_filsys fs
= rfs
->new_fs
;
1120 unsigned long max_group
;
1122 ext2fs_mark_super_dirty(fs
);
1123 ext2fs_mark_bb_dirty(fs
);
1124 ext2fs_mark_ib_dirty(fs
);
1126 retval
= ext2fs_allocate_block_bitmap(fs
, _("reserved blocks"),
1127 &rfs
->reserve_blocks
);
1131 retval
= adjust_fs_info(fs
, rfs
->old_fs
, rfs
->reserve_blocks
, new_size
);
1136 * Check to make sure there are enough inodes
1138 if ((rfs
->old_fs
->super
->s_inodes_count
-
1139 rfs
->old_fs
->super
->s_free_inodes_count
) >
1140 rfs
->new_fs
->super
->s_inodes_count
) {
1146 * If we are shrinking the number block groups, we're done and
1149 if (rfs
->old_fs
->group_desc_count
> fs
->group_desc_count
) {
1155 * If the number of block groups is staying the same, we're
1156 * done and can exit now. (If the number block groups is
1157 * shrinking, we had exited earlier.)
1159 if (rfs
->old_fs
->group_desc_count
>= fs
->group_desc_count
) {
1165 * If we are using uninit_bg (aka GDT_CSUM) and the kernel
1166 * supports lazy inode initialization, we can skip
1167 * initializing the inode table.
1169 if (lazy_itable_init
&& ext2fs_has_group_desc_csum(fs
)) {
1175 * Initialize the inode table
1177 retval
= ext2fs_get_array(fs
->blocksize
, fs
->inode_blocks_per_group
,
1182 memset(rfs
->itable_buf
, 0, fs
->blocksize
* fs
->inode_blocks_per_group
);
1183 adj
= rfs
->old_fs
->group_desc_count
;
1184 max_group
= fs
->group_desc_count
- adj
;
1185 if (rfs
->progress
) {
1186 retval
= rfs
->progress(rfs
, E2_RSZ_EXTEND_ITABLE_PASS
,
1191 for (i
= rfs
->old_fs
->group_desc_count
;
1192 i
< fs
->group_desc_count
; i
++) {
1194 * Write out the new inode table
1196 retval
= ext2fs_zero_blocks2(fs
, ext2fs_inode_table_loc(fs
, i
),
1197 fs
->inode_blocks_per_group
, NULL
,
1202 io_channel_flush(fs
->io
);
1203 if (rfs
->progress
) {
1204 retval
= rfs
->progress(rfs
, E2_RSZ_EXTEND_ITABLE_PASS
,
1205 i
- adj
+ 1, max_group
);
1210 io_channel_flush(fs
->io
);
1217 /* --------------------------------------------------------------------
1219 * Resize processing, phase 2.
1221 * In this phase we adjust determine which blocks need to be moved, in
1222 * blocks_to_move(). We then copy the blocks to their ultimate new
1223 * destinations using block_mover(). Since we are copying blocks to
1224 * their new locations, again during this pass we can abort without
1226 * --------------------------------------------------------------------
1230 * This helper function creates a block bitmap with all of the
1231 * filesystem meta-data blocks.
1233 static errcode_t
mark_table_blocks(ext2_filsys fs
,
1234 ext2fs_block_bitmap bmap
)
1239 for (i
= 0; i
< fs
->group_desc_count
; i
++) {
1240 ext2fs_reserve_super_and_bgd(fs
, i
, bmap
);
1243 * Mark the blocks used for the inode table
1245 blk
= ext2fs_inode_table_loc(fs
, i
);
1247 ext2fs_mark_block_bitmap_range2(bmap
, blk
,
1248 fs
->inode_blocks_per_group
);
1251 * Mark block used for the block bitmap
1253 blk
= ext2fs_block_bitmap_loc(fs
, i
);
1255 ext2fs_mark_block_bitmap2(bmap
, blk
);
1258 * Mark block used for the inode bitmap
1260 blk
= ext2fs_inode_bitmap_loc(fs
, i
);
1262 ext2fs_mark_block_bitmap2(bmap
, blk
);
1264 /* Reserve the MMP block */
1265 if (ext2fs_has_feature_mmp(fs
->super
) &&
1266 fs
->super
->s_mmp_block
> fs
->super
->s_first_data_block
&&
1267 fs
->super
->s_mmp_block
< ext2fs_blocks_count(fs
->super
))
1268 ext2fs_mark_block_bitmap2(bmap
, fs
->super
->s_mmp_block
);
1273 * This function checks to see if a particular block (either a
1274 * superblock or a block group descriptor) overlaps with an inode or
1275 * block bitmap block, or with the inode table.
1277 static void mark_fs_metablock(ext2_resize_t rfs
,
1278 ext2fs_block_bitmap meta_bmap
,
1279 int group
, blk64_t blk
)
1281 ext2_filsys fs
= rfs
->new_fs
;
1283 ext2fs_mark_block_bitmap2(rfs
->reserve_blocks
, blk
);
1284 ext2fs_block_alloc_stats2(fs
, blk
, +1);
1287 * Check to see if we overlap with the inode or block bitmap,
1288 * or the inode tables. If not, and the block is in use, then
1289 * mark it as a block to be moved.
1291 if (is_block_bm(fs
, group
, blk
)) {
1292 ext2fs_block_bitmap_loc_set(fs
, group
, 0);
1293 rfs
->needed_blocks
++;
1296 if (is_inode_bm(fs
, group
, blk
)) {
1297 ext2fs_inode_bitmap_loc_set(fs
, group
, 0);
1298 rfs
->needed_blocks
++;
1301 if (is_inode_tb(fs
, group
, blk
)) {
1302 ext2fs_inode_table_loc_set(fs
, group
, 0);
1303 rfs
->needed_blocks
++;
1306 if (ext2fs_has_feature_flex_bg(fs
->super
)) {
1309 for (i
= 0; i
< rfs
->old_fs
->group_desc_count
; i
++) {
1310 if (is_block_bm(fs
, i
, blk
)) {
1311 ext2fs_block_bitmap_loc_set(fs
, i
, 0);
1312 rfs
->needed_blocks
++;
1315 if (is_inode_bm(fs
, i
, blk
)) {
1316 ext2fs_inode_bitmap_loc_set(fs
, i
, 0);
1317 rfs
->needed_blocks
++;
1320 if (is_inode_tb(fs
, i
, blk
)) {
1321 ext2fs_inode_table_loc_set(fs
, i
, 0);
1322 rfs
->needed_blocks
++;
1328 if (ext2fs_has_group_desc_csum(fs
) &&
1329 (ext2fs_bg_flags_test(fs
, group
, EXT2_BG_BLOCK_UNINIT
))) {
1331 * If the block bitmap is uninitialized, which means
1332 * nothing other than standard metadata in use.
1335 } else if (blk
< ext2fs_blocks_count(rfs
->old_fs
->super
) &&
1336 ext2fs_test_block_bitmap2(rfs
->old_fs
->block_map
, blk
) &&
1337 !ext2fs_test_block_bitmap2(meta_bmap
, blk
)) {
1338 ext2fs_mark_block_bitmap2(rfs
->move_blocks
, blk
);
1339 rfs
->needed_blocks
++;
1345 * This routine marks and unmarks reserved blocks in the new block
1346 * bitmap. It also determines which blocks need to be moved and
1347 * places this information into the move_blocks bitmap.
1349 static errcode_t
blocks_to_move(ext2_resize_t rfs
)
1353 dgrp_t i
, max_groups
, g
;
1354 blk64_t blk
, group_blk
;
1355 blk64_t old_blocks
, new_blocks
, group_end
, cluster_freed
;
1357 unsigned int meta_bg
, meta_bg_size
;
1359 ext2_filsys fs
, old_fs
;
1360 ext2fs_block_bitmap meta_bmap
, new_meta_bmap
= NULL
;
1364 old_fs
= rfs
->old_fs
;
1365 if (ext2fs_blocks_count(old_fs
->super
) > ext2fs_blocks_count(fs
->super
))
1368 retval
= ext2fs_allocate_block_bitmap(fs
, _("blocks to be moved"),
1373 retval
= ext2fs_allocate_block_bitmap(fs
, _("meta-data blocks"),
1378 retval
= mark_table_blocks(old_fs
, meta_bmap
);
1385 * If we're shrinking the filesystem, we need to move any
1386 * group's metadata blocks (either allocation bitmaps or the
1387 * inode table) which are beyond the end of the new
1390 new_size
= ext2fs_blocks_count(fs
->super
);
1391 if (new_size
< ext2fs_blocks_count(old_fs
->super
)) {
1392 for (g
= 0; g
< fs
->group_desc_count
; g
++) {
1395 * ext2fs_allocate_group_table will re-allocate any
1396 * metadata blocks whose location is set to zero.
1398 if (ext2fs_block_bitmap_loc(fs
, g
) >= new_size
) {
1399 ext2fs_block_bitmap_loc_set(fs
, g
, 0);
1402 if (ext2fs_inode_bitmap_loc(fs
, g
) >= new_size
) {
1403 ext2fs_inode_bitmap_loc_set(fs
, g
, 0);
1406 if ((ext2fs_inode_table_loc(fs
, g
) +
1407 fs
->inode_blocks_per_group
) > new_size
) {
1408 ext2fs_inode_table_loc_set(fs
, g
, 0);
1413 retval
= ext2fs_allocate_group_table(fs
, g
, 0);
1421 * If we're shrinking the filesystem, we need to move all of
1422 * the blocks that don't fit any more
1424 for (blk
= ext2fs_blocks_count(fs
->super
);
1425 blk
< ext2fs_blocks_count(old_fs
->super
); blk
++) {
1426 g
= ext2fs_group_of_blk2(fs
, blk
);
1427 if (ext2fs_has_group_desc_csum(fs
) &&
1428 ext2fs_bg_flags_test(old_fs
, g
, EXT2_BG_BLOCK_UNINIT
)) {
1430 * The block bitmap is uninitialized, so skip
1431 * to the next block group.
1433 blk
= ext2fs_group_first_block2(fs
, g
+1) - 1;
1436 if (ext2fs_test_block_bitmap2(old_fs
->block_map
, blk
) &&
1437 !ext2fs_test_block_bitmap2(meta_bmap
, blk
)) {
1438 ext2fs_mark_block_bitmap2(rfs
->move_blocks
, blk
);
1439 rfs
->needed_blocks
++;
1441 ext2fs_mark_block_bitmap2(rfs
->reserve_blocks
, blk
);
1444 if (ext2fs_has_feature_meta_bg(old_fs
->super
))
1445 old_blocks
= old_fs
->super
->s_first_meta_bg
;
1447 old_blocks
= old_fs
->desc_blocks
+
1448 old_fs
->super
->s_reserved_gdt_blocks
;
1449 if (ext2fs_has_feature_meta_bg(fs
->super
))
1450 new_blocks
= fs
->super
->s_first_meta_bg
;
1452 new_blocks
= fs
->desc_blocks
+ fs
->super
->s_reserved_gdt_blocks
;
1454 retval
= reserve_sparse_super2_last_group(rfs
, meta_bmap
);
1458 if (EXT2_DESC_SIZE(rfs
->old_fs
->super
) ==
1459 EXT2_DESC_SIZE(rfs
->new_fs
->super
) &&
1460 old_blocks
== new_blocks
) {
1465 max_groups
= fs
->group_desc_count
;
1466 if (max_groups
> old_fs
->group_desc_count
)
1467 max_groups
= old_fs
->group_desc_count
;
1468 group_blk
= old_fs
->super
->s_first_data_block
;
1470 * If we're reducing the number of descriptor blocks, this
1471 * makes life easy. :-) We just have to mark some extra
1474 if (old_blocks
> new_blocks
) {
1475 if (EXT2FS_CLUSTER_RATIO(fs
) > 1) {
1476 retval
= ext2fs_allocate_block_bitmap(fs
,
1477 _("new meta blocks"),
1482 retval
= mark_table_blocks(fs
, new_meta_bmap
);
1487 for (i
= 0; i
< max_groups
; i
++) {
1488 if (!ext2fs_bg_has_super(old_fs
, i
)) {
1489 group_blk
+= fs
->super
->s_blocks_per_group
;
1492 group_end
= group_blk
+ 1 + old_blocks
;
1493 for (blk
= group_blk
+ 1 + new_blocks
;
1495 if (new_meta_bmap
== NULL
||
1496 !ext2fs_test_block_bitmap2(new_meta_bmap
,
1499 EXT2FS_CLUSTER_RATIO(fs
) -
1501 EXT2FS_CLUSTER_MASK(fs
));
1502 if (cluster_freed
> group_end
- blk
)
1503 cluster_freed
= group_end
- blk
;
1504 ext2fs_block_alloc_stats2(fs
, blk
, -1);
1505 blk
+= EXT2FS_CLUSTER_RATIO(fs
);
1506 rfs
->needed_blocks
-= cluster_freed
;
1509 rfs
->needed_blocks
--;
1512 group_blk
+= fs
->super
->s_blocks_per_group
;
1518 * If we're increasing the number of descriptor blocks, life
1519 * gets interesting....
1521 meta_bg_size
= EXT2_DESC_PER_BLOCK(fs
->super
);
1522 flex_bg
= ext2fs_has_feature_flex_bg(fs
->super
);
1523 /* first reserve all of the existing fs meta blocks */
1524 for (i
= 0; i
< max_groups
; i
++) {
1525 has_super
= ext2fs_bg_has_super(fs
, i
);
1527 mark_fs_metablock(rfs
, meta_bmap
, i
, group_blk
);
1529 meta_bg
= i
/ meta_bg_size
;
1530 if (!ext2fs_has_feature_meta_bg(fs
->super
) ||
1531 (meta_bg
< fs
->super
->s_first_meta_bg
)) {
1533 for (blk
= group_blk
+1;
1534 blk
< group_blk
+ 1 + new_blocks
; blk
++)
1535 mark_fs_metablock(rfs
, meta_bmap
,
1541 if (((i
% meta_bg_size
) == 0) ||
1542 ((i
% meta_bg_size
) == 1) ||
1543 ((i
% meta_bg_size
) == (meta_bg_size
-1)))
1544 mark_fs_metablock(rfs
, meta_bmap
, i
,
1545 group_blk
+ has_super
);
1549 * Reserve the existing meta blocks that we know
1550 * aren't to be moved.
1552 * For flex_bg file systems, in order to avoid
1553 * overwriting fs metadata (especially inode table
1554 * blocks) belonging to a different block group when
1555 * we are relocating the inode tables, we need to
1556 * reserve all existing fs metadata blocks.
1558 if (ext2fs_block_bitmap_loc(fs
, i
))
1559 ext2fs_mark_block_bitmap2(rfs
->reserve_blocks
,
1560 ext2fs_block_bitmap_loc(fs
, i
));
1561 else if (flex_bg
&& i
< old_fs
->group_desc_count
)
1562 ext2fs_mark_block_bitmap2(rfs
->reserve_blocks
,
1563 ext2fs_block_bitmap_loc(old_fs
, i
));
1565 if (ext2fs_inode_bitmap_loc(fs
, i
))
1566 ext2fs_mark_block_bitmap2(rfs
->reserve_blocks
,
1567 ext2fs_inode_bitmap_loc(fs
, i
));
1568 else if (flex_bg
&& i
< old_fs
->group_desc_count
)
1569 ext2fs_mark_block_bitmap2(rfs
->reserve_blocks
,
1570 ext2fs_inode_bitmap_loc(old_fs
, i
));
1572 if (ext2fs_inode_table_loc(fs
, i
))
1573 ext2fs_mark_block_bitmap_range2(rfs
->reserve_blocks
,
1574 ext2fs_inode_table_loc(fs
, i
),
1575 fs
->inode_blocks_per_group
);
1576 else if (flex_bg
&& i
< old_fs
->group_desc_count
)
1577 ext2fs_mark_block_bitmap_range2(rfs
->reserve_blocks
,
1578 ext2fs_inode_table_loc(old_fs
, i
),
1579 old_fs
->inode_blocks_per_group
);
1581 group_blk
+= rfs
->new_fs
->super
->s_blocks_per_group
;
1584 /* Allocate the missing data structures */
1585 for (i
= 0; i
< max_groups
; i
++) {
1586 if (ext2fs_inode_table_loc(fs
, i
) &&
1587 ext2fs_inode_bitmap_loc(fs
, i
) &&
1588 ext2fs_block_bitmap_loc(fs
, i
))
1591 retval
= ext2fs_allocate_group_table(fs
, i
,
1592 rfs
->reserve_blocks
);
1597 * For those structures that have changed, we need to
1600 if (ext2fs_block_bitmap_loc(old_fs
, i
) !=
1601 (blk
= ext2fs_block_bitmap_loc(fs
, i
))) {
1602 ext2fs_block_alloc_stats2(fs
, blk
, +1);
1603 if (blk
< ext2fs_blocks_count(old_fs
->super
) &&
1604 ext2fs_test_block_bitmap2(old_fs
->block_map
, blk
) &&
1605 !ext2fs_test_block_bitmap2(meta_bmap
, blk
))
1606 ext2fs_mark_block_bitmap2(rfs
->move_blocks
,
1609 if (ext2fs_inode_bitmap_loc(old_fs
, i
) !=
1610 (blk
= ext2fs_inode_bitmap_loc(fs
, i
))) {
1611 ext2fs_block_alloc_stats2(fs
, blk
, +1);
1612 if (blk
< ext2fs_blocks_count(old_fs
->super
) &&
1613 ext2fs_test_block_bitmap2(old_fs
->block_map
, blk
) &&
1614 !ext2fs_test_block_bitmap2(meta_bmap
, blk
))
1615 ext2fs_mark_block_bitmap2(rfs
->move_blocks
,
1620 * The inode table, if we need to relocate it, is
1621 * handled specially. We have to reserve the blocks
1622 * for both the old and the new inode table, since we
1623 * can't have the inode table be destroyed during the
1624 * block relocation phase.
1626 if (ext2fs_inode_table_loc(fs
, i
) == ext2fs_inode_table_loc(old_fs
, i
))
1627 continue; /* inode table not moved */
1629 rfs
->needed_blocks
+= fs
->inode_blocks_per_group
;
1632 * Mark the new inode table as in use in the new block
1633 * allocation bitmap, and move any blocks that might
1636 for (blk
= ext2fs_inode_table_loc(fs
, i
), j
=0;
1637 j
< fs
->inode_blocks_per_group
; j
++, blk
++) {
1638 ext2fs_block_alloc_stats2(fs
, blk
, +1);
1639 if (blk
< ext2fs_blocks_count(old_fs
->super
) &&
1640 ext2fs_test_block_bitmap2(old_fs
->block_map
, blk
) &&
1641 !ext2fs_test_block_bitmap2(meta_bmap
, blk
))
1642 ext2fs_mark_block_bitmap2(rfs
->move_blocks
,
1647 * Make sure the old inode table is reserved in the
1648 * block reservation bitmap.
1650 for (blk
= ext2fs_inode_table_loc(rfs
->old_fs
, i
), j
=0;
1651 j
< fs
->inode_blocks_per_group
; j
++, blk
++)
1652 ext2fs_mark_block_bitmap2(rfs
->reserve_blocks
, blk
);
1658 ext2fs_free_block_bitmap(new_meta_bmap
);
1660 ext2fs_free_block_bitmap(meta_bmap
);
1666 * This helper function tries to allocate a new block. We try to
1667 * avoid hitting the original group descriptor blocks at least at
1668 * first, since we want to make it possible to recover from a badly
1669 * aborted resize operation as much as possible.
1671 * In the future, I may further modify this routine to balance out
1672 * where we get the new blocks across the various block groups.
1673 * Ideally we would allocate blocks that corresponded with the block
1674 * group of the containing inode, and keep contiguous blocks
1675 * together. However, this very difficult to do efficiently, since we
1676 * don't have the necessary information up front.
1680 #define DESPERATION 2
1682 static void init_block_alloc(ext2_resize_t rfs
)
1684 rfs
->alloc_state
= AVOID_OLD
;
1685 rfs
->new_blk
= rfs
->new_fs
->super
->s_first_data_block
;
1687 /* HACK for testing */
1688 if (ext2fs_blocks_count(rfs
->new_fs
->super
) >
1689 ext2fs_blocks_count(rfs
->old_fs
->super
))
1690 rfs
->new_blk
= ext2fs_blocks_count(rfs
->old_fs
->super
);
1694 static blk64_t
get_new_block(ext2_resize_t rfs
)
1696 ext2_filsys fs
= rfs
->new_fs
;
1699 if (rfs
->new_blk
>= ext2fs_blocks_count(fs
->super
)) {
1700 if (rfs
->alloc_state
== DESPERATION
)
1703 #ifdef RESIZE2FS_DEBUG
1704 if (rfs
->flags
& RESIZE_DEBUG_BMOVE
)
1705 printf("Going into desperation mode "
1706 "for block allocations\n");
1708 rfs
->alloc_state
= DESPERATION
;
1709 rfs
->new_blk
= fs
->super
->s_first_data_block
;
1712 if (ext2fs_test_block_bitmap2(fs
->block_map
, rfs
->new_blk
) ||
1713 ext2fs_test_block_bitmap2(rfs
->reserve_blocks
,
1715 ((rfs
->alloc_state
== AVOID_OLD
) &&
1716 (rfs
->new_blk
< ext2fs_blocks_count(rfs
->old_fs
->super
)) &&
1717 ext2fs_test_block_bitmap2(rfs
->old_fs
->block_map
,
1722 return rfs
->new_blk
;
1726 static errcode_t
resize2fs_get_alloc_block(ext2_filsys fs
,
1727 blk64_t goal
EXT2FS_ATTR((unused
)),
1730 ext2_resize_t rfs
= (ext2_resize_t
) fs
->priv_data
;
1734 blk
= get_new_block(rfs
);
1738 #ifdef RESIZE2FS_DEBUG
1739 if (rfs
->flags
& 0xF)
1740 printf("get_alloc_block allocating %llu\n",
1741 (unsigned long long) blk
);
1744 ext2fs_mark_block_bitmap2(rfs
->old_fs
->block_map
, blk
);
1745 ext2fs_mark_block_bitmap2(rfs
->new_fs
->block_map
, blk
);
1747 group
= ext2fs_group_of_blk2(rfs
->old_fs
, blk
);
1748 ext2fs_clear_block_uninit(rfs
->old_fs
, group
);
1749 group
= ext2fs_group_of_blk2(rfs
->new_fs
, blk
);
1750 ext2fs_clear_block_uninit(rfs
->new_fs
, group
);
1752 *ret
= (blk64_t
) blk
;
1756 static errcode_t
block_mover(ext2_resize_t rfs
)
1758 blk64_t blk
, old_blk
, new_blk
;
1759 ext2_filsys fs
= rfs
->new_fs
;
1760 ext2_filsys old_fs
= rfs
->old_fs
;
1764 ext2_badblocks_list badblock_list
= 0;
1765 int bb_modified
= 0;
1767 fs
->get_alloc_block
= resize2fs_get_alloc_block
;
1768 old_fs
->get_alloc_block
= resize2fs_get_alloc_block
;
1770 retval
= ext2fs_read_bb_inode(old_fs
, &badblock_list
);
1774 new_blk
= fs
->super
->s_first_data_block
;
1775 if (!rfs
->itable_buf
) {
1776 retval
= ext2fs_get_array(fs
->blocksize
,
1777 fs
->inode_blocks_per_group
,
1782 retval
= ext2fs_create_extent_table(&rfs
->bmap
, 0);
1787 * The first step is to figure out where all of the blocks
1790 to_move
= moved
= 0;
1791 init_block_alloc(rfs
);
1792 for (blk
= B2C(old_fs
->super
->s_first_data_block
);
1793 blk
< ext2fs_blocks_count(old_fs
->super
);
1794 blk
+= EXT2FS_CLUSTER_RATIO(fs
)) {
1795 if (!ext2fs_test_block_bitmap2(old_fs
->block_map
, blk
))
1797 if (!ext2fs_test_block_bitmap2(rfs
->move_blocks
, blk
))
1799 if (ext2fs_badblocks_list_test(badblock_list
, blk
)) {
1800 ext2fs_badblocks_list_del(badblock_list
, blk
);
1805 new_blk
= get_new_block(rfs
);
1810 ext2fs_block_alloc_stats2(fs
, new_blk
, +1);
1811 ext2fs_add_extent_entry(rfs
->bmap
, B2C(blk
), B2C(new_blk
));
1817 ext2fs_free_extent_table(rfs
->bmap
);
1825 * Step two is to actually move the blocks
1827 retval
= ext2fs_iterate_extent(rfs
->bmap
, 0, 0, 0);
1828 if (retval
) goto errout
;
1830 if (rfs
->progress
) {
1831 retval
= (rfs
->progress
)(rfs
, E2_RSZ_BLOCK_RELOC_PASS
,
1837 retval
= ext2fs_iterate_extent(rfs
->bmap
, &old_blk
, &new_blk
, &size
);
1838 if (retval
) goto errout
;
1841 old_blk
= C2B(old_blk
);
1842 new_blk
= C2B(new_blk
);
1844 #ifdef RESIZE2FS_DEBUG
1845 if (rfs
->flags
& RESIZE_DEBUG_BMOVE
)
1846 printf("Moving %llu blocks %llu->%llu\n",
1847 (unsigned long long) size
,
1848 (unsigned long long) old_blk
,
1849 (unsigned long long) new_blk
);
1853 if (c
> fs
->inode_blocks_per_group
)
1854 c
= fs
->inode_blocks_per_group
;
1855 retval
= io_channel_read_blk64(fs
->io
, old_blk
, c
,
1857 if (retval
) goto errout
;
1858 retval
= io_channel_write_blk64(fs
->io
, new_blk
, c
,
1860 if (retval
) goto errout
;
1865 if (rfs
->progress
) {
1866 io_channel_flush(fs
->io
);
1867 retval
= (rfs
->progress
)(rfs
,
1868 E2_RSZ_BLOCK_RELOC_PASS
,
1874 io_channel_flush(fs
->io
);
1878 if (badblock_list
) {
1879 if (!retval
&& bb_modified
)
1880 retval
= ext2fs_update_bb_inode(old_fs
,
1882 ext2fs_badblocks_list_free(badblock_list
);
1888 /* --------------------------------------------------------------------
1890 * Resize processing, phase 3
1892 * --------------------------------------------------------------------
1897 * The extent translation table is stored in clusters so we need to
1898 * take special care when mapping a source block number to its
1899 * destination block number.
1901 static __u64
extent_translate(ext2_filsys fs
, ext2_extent extent
, __u64 old_loc
)
1903 __u64 new_block
= C2B(ext2fs_extent_translate(extent
, B2C(old_loc
)));
1906 new_block
+= old_loc
& (EXT2FS_CLUSTER_RATIO(fs
) - 1);
1910 struct process_block_struct
{
1914 struct ext2_inode
* inode
;
1921 static int process_block(ext2_filsys fs
, blk64_t
*block_nr
,
1922 e2_blkcnt_t blockcnt
,
1923 blk64_t ref_block
EXT2FS_ATTR((unused
)),
1924 int ref_offset
EXT2FS_ATTR((unused
)), void *priv_data
)
1926 struct process_block_struct
*pb
;
1928 blk64_t block
, new_block
;
1931 pb
= (struct process_block_struct
*) priv_data
;
1933 if (pb
->rfs
->bmap
) {
1934 new_block
= extent_translate(fs
, pb
->rfs
->bmap
, block
);
1936 *block_nr
= new_block
;
1937 ret
|= BLOCK_CHANGED
;
1939 #ifdef RESIZE2FS_DEBUG
1940 if (pb
->rfs
->flags
& RESIZE_DEBUG_BMOVE
)
1941 printf("ino=%u, blockcnt=%lld, %llu->%llu\n",
1942 pb
->old_ino
, (long long) blockcnt
,
1943 (unsigned long long) block
,
1944 (unsigned long long) new_block
);
1951 retval
= ext2fs_add_dir_block2(fs
->dblist
, pb
->ino
,
1952 block
, (int) blockcnt
);
1964 static errcode_t
progress_callback(ext2_filsys fs
,
1965 ext2_inode_scan scan
EXT2FS_ATTR((unused
)),
1966 dgrp_t group
, void * priv_data
)
1968 ext2_resize_t rfs
= (ext2_resize_t
) priv_data
;
1972 * This check is to protect against old ext2 libraries. It
1973 * shouldn't be needed against new libraries.
1978 if (rfs
->progress
) {
1979 io_channel_flush(fs
->io
);
1980 retval
= (rfs
->progress
)(rfs
, E2_RSZ_INODE_SCAN_PASS
,
1981 group
+1, fs
->group_desc_count
);
1989 static errcode_t
migrate_ea_block(ext2_resize_t rfs
, ext2_ino_t ino
,
1990 struct ext2_inode
*inode
, int *changed
)
1996 /* No EA block or no remapping? Quit early. */
1997 if (ext2fs_file_acl_block(rfs
->old_fs
, inode
) == 0 || !rfs
->bmap
)
1999 new_block
= extent_translate(rfs
->old_fs
, rfs
->bmap
,
2000 ext2fs_file_acl_block(rfs
->old_fs
, inode
));
2004 /* Set the new ACL block */
2005 ext2fs_file_acl_block_set(rfs
->old_fs
, inode
, new_block
);
2007 /* Update checksum */
2008 if (ext2fs_has_feature_metadata_csum(rfs
->new_fs
->super
)) {
2009 err
= ext2fs_get_mem(rfs
->old_fs
->blocksize
, &buf
);
2012 rfs
->old_fs
->flags
|= EXT2_FLAG_IGNORE_CSUM_ERRORS
;
2013 err
= ext2fs_read_ext_attr3(rfs
->old_fs
, new_block
, buf
, ino
);
2014 rfs
->old_fs
->flags
&= ~EXT2_FLAG_IGNORE_CSUM_ERRORS
;
2017 err
= ext2fs_write_ext_attr3(rfs
->old_fs
, new_block
, buf
, ino
);
2024 ext2fs_free_mem(&buf
);
2028 static void quiet_com_err_proc(const char *whoami
EXT2FS_ATTR((unused
)),
2029 errcode_t code
EXT2FS_ATTR((unused
)),
2030 const char *fmt
EXT2FS_ATTR((unused
)),
2031 va_list args
EXT2FS_ATTR((unused
)))
2035 static int fix_ea_entries(ext2_extent imap
, struct ext2_ext_attr_entry
*entry
,
2036 struct ext2_ext_attr_entry
*end
, ext2_ino_t last_ino
)
2041 while (entry
< end
&& !EXT2_EXT_IS_LAST_ENTRY(entry
)) {
2042 if (entry
->e_value_inum
> last_ino
) {
2043 new_ino
= ext2fs_extent_translate(imap
,
2044 entry
->e_value_inum
);
2045 entry
->e_value_inum
= new_ino
;
2048 entry
= EXT2_EXT_ATTR_NEXT(entry
);
2053 static int fix_ea_ibody_entries(ext2_extent imap
,
2054 struct ext2_inode_large
*inode
, int inode_size
,
2055 ext2_ino_t last_ino
)
2057 struct ext2_ext_attr_entry
*start
, *end
;
2060 if (inode
->i_extra_isize
== 0)
2063 ea_magic
= (__u32
*)((char *)inode
+ EXT2_GOOD_OLD_INODE_SIZE
+
2064 inode
->i_extra_isize
);
2065 if (*ea_magic
!= EXT2_EXT_ATTR_MAGIC
)
2068 start
= (struct ext2_ext_attr_entry
*)(ea_magic
+ 1);
2069 end
= (struct ext2_ext_attr_entry
*)((char *)inode
+ inode_size
);
2071 return fix_ea_entries(imap
, start
, end
, last_ino
);
2074 static int fix_ea_block_entries(ext2_extent imap
, char *block_buf
,
2075 unsigned int blocksize
, ext2_ino_t last_ino
)
2077 struct ext2_ext_attr_header
*header
;
2078 struct ext2_ext_attr_entry
*start
, *end
;
2080 header
= (struct ext2_ext_attr_header
*)block_buf
;
2081 start
= (struct ext2_ext_attr_entry
*)(header
+1);
2082 end
= (struct ext2_ext_attr_entry
*)(block_buf
+ blocksize
);
2084 return fix_ea_entries(imap
, start
, end
, last_ino
);
2087 /* A simple LRU cache to check recently processed blocks. */
2093 #define BLK_IN_CACHE(b,c) ((b) == (c).blks[0] || (b) == (c).blks[1] || \
2094 (b) == (c).blks[2] || (b) == (c).blks[3])
2095 #define BLK_ADD_CACHE(b,c) { \
2096 (c).blks[(c).cursor] = (b); \
2097 (c).cursor = ((c).cursor + 1) % 4; \
2100 static errcode_t
fix_ea_inode_refs(ext2_resize_t rfs
, struct ext2_inode
*inode
,
2101 char *block_buf
, ext2_ino_t last_ino
)
2103 ext2_filsys fs
= rfs
->new_fs
;
2104 ext2_inode_scan scan
= NULL
;
2106 int inode_size
= EXT2_INODE_SIZE(fs
->super
);
2109 struct blk_cache blk_cache
;
2110 struct ext2_ext_attr_header
*header
;
2113 memset(&blk_cache
, 0, sizeof(blk_cache
));
2115 header
= (struct ext2_ext_attr_header
*)block_buf
;
2117 retval
= ext2fs_open_inode_scan(fs
, 0, &scan
);
2122 retval
= ext2fs_get_next_inode_full(scan
, &ino
, inode
,
2129 if (inode
->i_links_count
== 0 && ino
!= EXT2_RESIZE_INO
)
2130 continue; /* inode not in use */
2132 if (inode_size
!= EXT2_GOOD_OLD_INODE_SIZE
) {
2133 modified
= fix_ea_ibody_entries(rfs
->imap
,
2134 (struct ext2_inode_large
*)inode
,
2135 inode_size
, last_ino
);
2137 retval
= ext2fs_write_inode_full(fs
, ino
, inode
,
2144 blk
= ext2fs_file_acl_block(fs
, inode
);
2145 if (blk
&& !BLK_IN_CACHE(blk
, blk_cache
)) {
2146 retval
= ext2fs_read_ext_attr3(fs
, blk
, block_buf
, ino
);
2150 modified
= fix_ea_block_entries(rfs
->imap
, block_buf
,
2154 retval
= ext2fs_write_ext_attr3(fs
, blk
,
2159 * If refcount is greater than 1, we might see
2160 * the same block referenced by other inodes
2163 if (header
->h_refcount
> 1)
2164 BLK_ADD_CACHE(blk
, blk_cache
);
2171 ext2fs_close_inode_scan(scan
);
2175 static errcode_t
inode_scan_and_fix(ext2_resize_t rfs
)
2177 struct process_block_struct pb
;
2178 ext2_ino_t ino
, new_inode
;
2179 struct ext2_inode
*inode
= NULL
;
2180 ext2_inode_scan scan
= NULL
;
2182 char *block_buf
= 0;
2183 ext2_ino_t start_to_move
;
2185 int update_ea_inode_refs
= 0;
2187 if ((rfs
->old_fs
->group_desc_count
<=
2188 rfs
->new_fs
->group_desc_count
) &&
2192 set_com_err_hook(quiet_com_err_proc
);
2194 retval
= ext2fs_open_inode_scan(rfs
->old_fs
, 0, &scan
);
2195 if (retval
) goto errout
;
2197 retval
= ext2fs_init_dblist(rfs
->old_fs
, 0);
2198 if (retval
) goto errout
;
2199 retval
= ext2fs_get_array(rfs
->old_fs
->blocksize
, 3, &block_buf
);
2200 if (retval
) goto errout
;
2202 start_to_move
= (rfs
->new_fs
->group_desc_count
*
2203 rfs
->new_fs
->super
->s_inodes_per_group
);
2205 if (rfs
->progress
) {
2206 retval
= (rfs
->progress
)(rfs
, E2_RSZ_INODE_SCAN_PASS
,
2207 0, rfs
->old_fs
->group_desc_count
);
2211 ext2fs_set_inode_callback(scan
, progress_callback
, (void *) rfs
);
2215 new_inode
= EXT2_FIRST_INODE(rfs
->new_fs
->super
);
2216 inode_size
= EXT2_INODE_SIZE(rfs
->new_fs
->super
);
2217 inode
= malloc(inode_size
);
2223 * First, copy all of the inodes that need to be moved
2224 * elsewhere in the inode table
2227 retval
= ext2fs_get_next_inode_full(scan
, &ino
, inode
, inode_size
);
2228 if (retval
) goto errout
;
2232 if (inode
->i_links_count
== 0 && ino
!= EXT2_RESIZE_INO
)
2233 continue; /* inode not in use */
2235 pb
.is_dir
= LINUX_S_ISDIR(inode
->i_mode
);
2238 /* Remap EA block */
2239 retval
= migrate_ea_block(rfs
, ino
, inode
, &pb
.changed
);
2244 if (ino
<= start_to_move
)
2245 goto remap_blocks
; /* Don't need to move inode. */
2248 * Find a new inode. Now that extents and directory blocks
2249 * are tied to the inode number through the checksum, we must
2250 * set up the new inode before we start rewriting blocks.
2252 retval
= ext2fs_new_inode(rfs
->new_fs
, 0, 0, 0, &new_inode
);
2256 ext2fs_inode_alloc_stats2(rfs
->new_fs
, new_inode
, +1,
2259 * i_ctime field in xattr inodes contain a portion of the ref
2260 * count, do not overwrite.
2262 if (inode
->i_flags
& EXT4_EA_INODE_FL
)
2263 update_ea_inode_refs
= 1;
2265 inode
->i_ctime
= rfs
->old_fs
->now
?
2266 rfs
->old_fs
->now
: time(0);
2268 retval
= ext2fs_write_inode_full(rfs
->old_fs
, new_inode
,
2274 #ifdef RESIZE2FS_DEBUG
2275 if (rfs
->flags
& RESIZE_DEBUG_INODEMAP
)
2276 printf("Inode moved %u->%u\n", ino
, new_inode
);
2279 retval
= ext2fs_create_extent_table(&rfs
->imap
, 0);
2283 ext2fs_add_extent_entry(rfs
->imap
, ino
, new_inode
);
2287 retval
= ext2fs_write_inode_full(rfs
->old_fs
,
2294 * Update inodes to point to new blocks; schedule directory
2295 * blocks for inode remapping. Need to write out dir blocks
2296 * with new inode numbers if we have metadata_csum enabled.
2298 rfs
->old_fs
->flags
|= EXT2_FLAG_IGNORE_CSUM_ERRORS
;
2299 if (ext2fs_inode_has_valid_blocks2(rfs
->old_fs
, inode
) &&
2300 (rfs
->bmap
|| pb
.is_dir
)) {
2303 pb
.has_extents
= inode
->i_flags
& EXT4_EXTENTS_FL
;
2304 retval
= ext2fs_block_iterate3(rfs
->old_fs
,
2305 new_inode
, 0, block_buf
,
2306 process_block
, &pb
);
2313 } else if ((inode
->i_flags
& EXT4_INLINE_DATA_FL
) &&
2314 (rfs
->bmap
|| pb
.is_dir
)) {
2315 /* inline data dir; update it too */
2316 retval
= ext2fs_add_dir_block2(rfs
->old_fs
->dblist
,
2322 /* Fix up extent block checksums with the new inode number */
2323 if (ext2fs_has_feature_metadata_csum(rfs
->old_fs
->super
) &&
2324 (inode
->i_flags
& EXT4_EXTENTS_FL
)) {
2325 retval
= ext2fs_fix_extents_checksums(rfs
->old_fs
,
2332 if (update_ea_inode_refs
&&
2333 ext2fs_has_feature_ea_inode(rfs
->new_fs
->super
)) {
2334 retval
= fix_ea_inode_refs(rfs
, inode
, block_buf
,
2339 io_channel_flush(rfs
->old_fs
->io
);
2342 reset_com_err_hook();
2343 rfs
->old_fs
->flags
&= ~EXT2_FLAG_IGNORE_CSUM_ERRORS
;
2345 ext2fs_free_extent_table(rfs
->bmap
);
2349 ext2fs_close_inode_scan(scan
);
2351 ext2fs_free_mem(&block_buf
);
2356 /* --------------------------------------------------------------------
2358 * Resize processing, phase 4.
2360 * --------------------------------------------------------------------
2366 unsigned int max_dirs
;
2370 static int check_and_change_inodes(ext2_ino_t dir
,
2371 int entry
EXT2FS_ATTR((unused
)),
2372 struct ext2_dir_entry
*dirent
, int offset
,
2373 int blocksize
EXT2FS_ATTR((unused
)),
2374 char *buf
EXT2FS_ATTR((unused
)),
2377 struct istruct
*is
= (struct istruct
*) priv_data
;
2378 struct ext2_inode inode
;
2379 ext2_ino_t new_inode
;
2383 if (is
->rfs
->progress
&& offset
== 0) {
2384 io_channel_flush(is
->rfs
->old_fs
->io
);
2385 is
->err
= (is
->rfs
->progress
)(is
->rfs
,
2386 E2_RSZ_INODE_REF_UPD_PASS
,
2387 ++is
->num
, is
->max_dirs
);
2389 return DIRENT_ABORT
;
2393 * If we have checksums enabled and the inode wasn't present in the
2394 * old fs, then we must rewrite all dir blocks with new checksums.
2396 if (ext2fs_has_feature_metadata_csum(is
->rfs
->old_fs
->super
) &&
2397 !ext2fs_test_inode_bitmap2(is
->rfs
->old_fs
->inode_map
, dir
))
2398 ret
|= DIRENT_CHANGED
;
2403 new_inode
= ext2fs_extent_translate(is
->rfs
->imap
, dirent
->inode
);
2407 #ifdef RESIZE2FS_DEBUG
2408 if (is
->rfs
->flags
& RESIZE_DEBUG_INODEMAP
)
2409 printf("Inode translate (dir=%u, name=%.*s, %u->%u)\n",
2410 dir
, ext2fs_dirent_name_len(dirent
), dirent
->name
,
2411 dirent
->inode
, new_inode
);
2414 dirent
->inode
= new_inode
;
2416 /* Update the directory mtime and ctime */
2417 retval
= ext2fs_read_inode(is
->rfs
->old_fs
, dir
, &inode
);
2419 inode
.i_mtime
= inode
.i_ctime
= is
->rfs
->old_fs
->now
?
2420 is
->rfs
->old_fs
->now
: time(0);
2421 is
->err
= ext2fs_write_inode(is
->rfs
->old_fs
, dir
, &inode
);
2423 return ret
| DIRENT_ABORT
;
2426 return ret
| DIRENT_CHANGED
;
2429 static errcode_t
inode_ref_fix(ext2_resize_t rfs
)
2438 * Now, we iterate over all of the directories to update the
2442 is
.max_dirs
= ext2fs_dblist_count2(rfs
->old_fs
->dblist
);
2446 if (rfs
->progress
) {
2447 retval
= (rfs
->progress
)(rfs
, E2_RSZ_INODE_REF_UPD_PASS
,
2453 rfs
->old_fs
->flags
|= EXT2_FLAG_IGNORE_CSUM_ERRORS
;
2454 retval
= ext2fs_dblist_dir_iterate(rfs
->old_fs
->dblist
,
2455 DIRENT_FLAG_INCLUDE_EMPTY
, 0,
2456 check_and_change_inodes
, &is
);
2457 rfs
->old_fs
->flags
&= ~EXT2_FLAG_IGNORE_CSUM_ERRORS
;
2465 if (rfs
->progress
&& (is
.num
< is
.max_dirs
))
2466 (rfs
->progress
)(rfs
, E2_RSZ_INODE_REF_UPD_PASS
,
2467 is
.max_dirs
, is
.max_dirs
);
2470 ext2fs_free_extent_table(rfs
->imap
);
2476 /* --------------------------------------------------------------------
2478 * Resize processing, phase 5.
2480 * In this phase we actually move the inode table around, and then
2481 * update the summary statistics. This is scary, since aborting here
2482 * will potentially scramble the filesystem. (We are moving the
2483 * inode tables around in place, and so the potential for lost data,
2484 * or at the very least scrambling the mapping between filenames and
2485 * inode numbers is very high in case of a power failure here.)
2486 * --------------------------------------------------------------------
2491 * A very scary routine --- this one moves the inode table around!!!
2493 * After this you have to use the rfs->new_fs file handle to read and
2496 static errcode_t
move_itables(ext2_resize_t rfs
)
2500 dgrp_t i
, max_groups
;
2501 ext2_filsys fs
= rfs
->new_fs
;
2503 blk64_t old_blk
, new_blk
, blk
, cluster_freed
;
2507 ext2fs_block_bitmap new_bmap
= NULL
;
2509 max_groups
= fs
->group_desc_count
;
2510 if (max_groups
> rfs
->old_fs
->group_desc_count
)
2511 max_groups
= rfs
->old_fs
->group_desc_count
;
2513 size
= fs
->blocksize
* fs
->inode_blocks_per_group
;
2514 if (!rfs
->itable_buf
) {
2515 retval
= ext2fs_get_mem(size
, &rfs
->itable_buf
);
2520 if (EXT2FS_CLUSTER_RATIO(fs
) > 1) {
2521 retval
= ext2fs_allocate_block_bitmap(fs
, _("new meta blocks"),
2526 retval
= mark_table_blocks(fs
, new_bmap
);
2532 * Figure out how many inode tables we need to move
2534 to_move
= moved
= 0;
2535 for (i
=0; i
< max_groups
; i
++)
2536 if (ext2fs_inode_table_loc(rfs
->old_fs
, i
) !=
2537 ext2fs_inode_table_loc(fs
, i
))
2545 if (rfs
->progress
) {
2546 retval
= rfs
->progress(rfs
, E2_RSZ_MOVE_ITABLE_PASS
,
2552 rfs
->old_fs
->flags
|= EXT2_FLAG_MASTER_SB_ONLY
;
2554 for (i
=0; i
< max_groups
; i
++) {
2555 old_blk
= ext2fs_inode_table_loc(rfs
->old_fs
, i
);
2556 new_blk
= ext2fs_inode_table_loc(fs
, i
);
2557 diff
= new_blk
- old_blk
;
2559 #ifdef RESIZE2FS_DEBUG
2560 if (rfs
->flags
& RESIZE_DEBUG_ITABLEMOVE
)
2561 printf("Itable move group %d block %llu->%llu (diff %lld)\n",
2562 i
, (unsigned long long) old_blk
,
2563 (unsigned long long) new_blk
, diff
);
2571 retval
= io_channel_read_blk64(fs
->io
, old_blk
,
2572 fs
->inode_blocks_per_group
,
2577 * The end of the inode table segment often contains
2578 * all zeros, and we're often only moving the inode
2579 * table down a block or two. If so, we can optimize
2580 * things by not rewriting blocks that we know to be zero
2583 for (cp
= rfs
->itable_buf
+size
-1, n
=0; n
< size
; n
++, cp
--)
2586 n
= n
>> EXT2_BLOCK_SIZE_BITS(fs
->super
);
2587 #ifdef RESIZE2FS_DEBUG
2588 if (rfs
->flags
& RESIZE_DEBUG_ITABLEMOVE
)
2589 printf("%d blocks of zeros...\n", n
);
2591 num
= fs
->inode_blocks_per_group
;
2595 retval
= io_channel_write_blk64(fs
->io
, new_blk
,
2596 num
, rfs
->itable_buf
);
2598 io_channel_write_blk64(fs
->io
, old_blk
,
2599 num
, rfs
->itable_buf
);
2603 retval
= io_channel_write_blk64(fs
->io
,
2604 old_blk
+ fs
->inode_blocks_per_group
,
2605 diff
, (rfs
->itable_buf
+
2606 (fs
->inode_blocks_per_group
- diff
) *
2612 for (blk
= ext2fs_inode_table_loc(rfs
->old_fs
, i
), j
=0;
2613 j
< fs
->inode_blocks_per_group
;) {
2614 if (new_bmap
== NULL
||
2615 !ext2fs_test_block_bitmap2(new_bmap
, blk
)) {
2616 ext2fs_block_alloc_stats2(fs
, blk
, -1);
2617 cluster_freed
= EXT2FS_CLUSTER_RATIO(fs
) -
2618 (blk
& EXT2FS_CLUSTER_MASK(fs
));
2619 blk
+= cluster_freed
;
2627 ext2fs_inode_table_loc_set(rfs
->old_fs
, i
, new_blk
);
2628 ext2fs_group_desc_csum_set(rfs
->old_fs
, i
);
2629 ext2fs_mark_super_dirty(rfs
->old_fs
);
2630 ext2fs_flush(rfs
->old_fs
);
2632 if (rfs
->progress
) {
2633 retval
= rfs
->progress(rfs
, E2_RSZ_MOVE_ITABLE_PASS
,
2639 mark_table_blocks(fs
, fs
->block_map
);
2641 #ifdef RESIZE2FS_DEBUG
2642 if (rfs
->flags
& RESIZE_DEBUG_ITABLEMOVE
)
2643 printf("Inode table move finished.\n");
2649 ext2fs_free_block_bitmap(new_bmap
);
2654 * This function is used when expanding a file system. It frees the
2655 * superblock and block group descriptor blocks from the block group
2656 * which is no longer the last block group.
2658 static errcode_t
clear_sparse_super2_last_group(ext2_resize_t rfs
)
2660 ext2_filsys fs
= rfs
->new_fs
;
2661 ext2_filsys old_fs
= rfs
->old_fs
;
2663 dgrp_t old_last_bg
= rfs
->old_fs
->group_desc_count
- 1;
2664 dgrp_t last_bg
= fs
->group_desc_count
- 1;
2665 blk64_t sb
, old_desc
;
2668 if (!ext2fs_has_feature_sparse_super2(fs
->super
))
2671 if (last_bg
<= old_last_bg
)
2674 if (fs
->super
->s_backup_bgs
[0] == old_fs
->super
->s_backup_bgs
[0] &&
2675 fs
->super
->s_backup_bgs
[1] == old_fs
->super
->s_backup_bgs
[1])
2678 if (old_fs
->super
->s_backup_bgs
[0] != old_last_bg
&&
2679 old_fs
->super
->s_backup_bgs
[1] != old_last_bg
)
2682 if (fs
->super
->s_backup_bgs
[0] == old_last_bg
||
2683 fs
->super
->s_backup_bgs
[1] == old_last_bg
)
2686 if (old_last_bg
== 0)
2689 retval
= ext2fs_super_and_bgd_loc2(rfs
->old_fs
, old_last_bg
,
2690 &sb
, &old_desc
, NULL
, &num
);
2695 ext2fs_unmark_block_bitmap2(fs
->block_map
, sb
);
2697 ext2fs_unmark_block_bitmap_range2(fs
->block_map
, old_desc
, num
);
2702 * This function is used when shrinking a file system. We need to
2703 * utilize blocks from what will be the new last block group for the
2704 * backup superblock and block group descriptor blocks.
2705 * Unfortunately, those blocks may be used by other files or fs
2706 * metadata blocks. We need to mark them as being in use.
2708 static errcode_t
reserve_sparse_super2_last_group(ext2_resize_t rfs
,
2709 ext2fs_block_bitmap meta_bmap
)
2711 ext2_filsys fs
= rfs
->new_fs
;
2712 ext2_filsys old_fs
= rfs
->old_fs
;
2714 dgrp_t old_last_bg
= rfs
->old_fs
->group_desc_count
- 1;
2715 dgrp_t last_bg
= fs
->group_desc_count
- 1;
2717 blk64_t blk
, sb
, old_desc
;
2721 if (!ext2fs_has_feature_sparse_super2(fs
->super
))
2724 if (last_bg
>= old_last_bg
)
2727 if (fs
->super
->s_backup_bgs
[0] == old_fs
->super
->s_backup_bgs
[0] &&
2728 fs
->super
->s_backup_bgs
[1] == old_fs
->super
->s_backup_bgs
[1])
2731 if (fs
->super
->s_backup_bgs
[0] != last_bg
&&
2732 fs
->super
->s_backup_bgs
[1] != last_bg
)
2735 if (old_fs
->super
->s_backup_bgs
[0] == last_bg
||
2736 old_fs
->super
->s_backup_bgs
[1] == last_bg
)
2739 retval
= ext2fs_super_and_bgd_loc2(rfs
->new_fs
, last_bg
,
2740 &sb
, &old_desc
, NULL
, &num
);
2744 if (last_bg
&& !sb
) {
2745 fputs(_("Should never happen! No sb in last super_sparse bg?\n"),
2749 if (old_desc
&& old_desc
!= sb
+1) {
2750 fputs(_("Should never happen! Unexpected old_desc in "
2751 "super_sparse bg?\n"),
2755 num
= (old_desc
) ? num
: 1;
2757 /* Reserve the backup blocks */
2758 ext2fs_mark_block_bitmap_range2(fs
->block_map
, sb
, num
);
2760 for (g
= 0; g
< fs
->group_desc_count
; g
++) {
2763 mb
= ext2fs_block_bitmap_loc(fs
, g
);
2764 if ((mb
>= sb
) && (mb
< sb
+ num
)) {
2765 ext2fs_block_bitmap_loc_set(fs
, g
, 0);
2768 mb
= ext2fs_inode_bitmap_loc(fs
, g
);
2769 if ((mb
>= sb
) && (mb
< sb
+ num
)) {
2770 ext2fs_inode_bitmap_loc_set(fs
, g
, 0);
2773 mb
= ext2fs_inode_table_loc(fs
, g
);
2774 if ((mb
< sb
+ num
) &&
2775 (sb
< mb
+ fs
->inode_blocks_per_group
)) {
2776 ext2fs_inode_table_loc_set(fs
, g
, 0);
2780 retval
= ext2fs_allocate_group_table(fs
, g
, 0);
2786 for (blk
= sb
, i
= 0; i
< num
; blk
++, i
++) {
2787 if (ext2fs_test_block_bitmap2(old_fs
->block_map
, blk
) &&
2788 !ext2fs_test_block_bitmap2(meta_bmap
, blk
)) {
2789 ext2fs_mark_block_bitmap2(rfs
->move_blocks
, blk
);
2790 rfs
->needed_blocks
++;
2792 ext2fs_mark_block_bitmap2(rfs
->reserve_blocks
, blk
);
2798 * Fix the resize inode
2800 static errcode_t
fix_resize_inode(ext2_filsys fs
)
2802 struct ext2_inode inode
;
2805 if (!ext2fs_has_feature_resize_inode(fs
->super
))
2808 retval
= ext2fs_read_inode(fs
, EXT2_RESIZE_INO
, &inode
);
2809 if (retval
) goto errout
;
2811 ext2fs_iblk_set(fs
, &inode
, 1);
2813 retval
= ext2fs_write_inode(fs
, EXT2_RESIZE_INO
, &inode
);
2814 if (retval
) goto errout
;
2816 if (!inode
.i_block
[EXT2_DIND_BLOCK
]) {
2818 * Avoid zeroing out block #0; that's rude. This
2819 * should never happen anyway since the filesystem
2820 * should be fsck'ed and we assume it is consistent.
2822 fprintf(stderr
, "%s",
2823 _("Should never happen: resize inode corrupt!\n"));
2827 retval
= ext2fs_zero_blocks2(fs
, inode
.i_block
[EXT2_DIND_BLOCK
], 1,
2832 retval
= ext2fs_create_resize_inode(fs
);
2841 * Finally, recalculate the summary information
2843 static errcode_t
resize2fs_calculate_summary_stats(ext2_filsys fs
)
2846 blk64_t blk
= fs
->super
->s_first_data_block
;
2848 unsigned int n
, group
, count
;
2849 blk64_t total_clusters_free
= 0;
2850 int total_inodes_free
= 0;
2856 * First calculate the block statistics
2858 bitmap_buf
= malloc(fs
->blocksize
);
2861 for (group
= 0; group
< fs
->group_desc_count
;
2863 retval
= ext2fs_get_block_bitmap_range2(fs
->block_map
,
2864 B2C(blk
), fs
->super
->s_clusters_per_group
, bitmap_buf
);
2869 n
= ext2fs_bitcount(bitmap_buf
,
2870 fs
->super
->s_clusters_per_group
/ 8);
2871 group_free
= fs
->super
->s_clusters_per_group
- n
;
2872 total_clusters_free
+= group_free
;
2873 ext2fs_bg_free_blocks_count_set(fs
, group
, group_free
);
2874 ext2fs_group_desc_csum_set(fs
, group
);
2875 blk
+= fs
->super
->s_blocks_per_group
;
2878 ext2fs_free_blocks_count_set(fs
->super
, C2B(total_clusters_free
));
2881 * Next, calculate the inode statistics
2887 /* Protect loop from wrap-around if s_inodes_count maxed */
2888 uninit
= ext2fs_bg_flags_test(fs
, group
, EXT2_BG_INODE_UNINIT
);
2889 for (ino
= 1; ino
<= fs
->super
->s_inodes_count
&& ino
> 0; ino
++) {
2891 !ext2fs_fast_test_inode_bitmap2(fs
->inode_map
, ino
)) {
2893 total_inodes_free
++;
2896 if ((count
== fs
->super
->s_inodes_per_group
) ||
2897 (ino
== fs
->super
->s_inodes_count
)) {
2898 ext2fs_bg_free_inodes_count_set(fs
, group
, group_free
);
2899 ext2fs_group_desc_csum_set(fs
, group
);
2901 if (group
>= fs
->group_desc_count
)
2905 uninit
= ext2fs_bg_flags_test(fs
, group
, EXT2_BG_INODE_UNINIT
);
2908 fs
->super
->s_free_inodes_count
= total_inodes_free
;
2909 ext2fs_mark_super_dirty(fs
);
2914 * Journal may have been relocated; update the backup journal blocks
2915 * in the superblock.
2917 static errcode_t
fix_sb_journal_backup(ext2_filsys fs
)
2920 struct ext2_inode inode
;
2922 if (!ext2fs_has_feature_journal(fs
->super
))
2925 /* External journal? Nothing to do. */
2926 if (fs
->super
->s_journal_dev
&& !fs
->super
->s_journal_inum
)
2929 retval
= ext2fs_read_inode(fs
, fs
->super
->s_journal_inum
, &inode
);
2932 memcpy(fs
->super
->s_jnl_blocks
, inode
.i_block
, EXT2_N_BLOCKS
*4);
2933 fs
->super
->s_jnl_blocks
[15] = inode
.i_size_high
;
2934 fs
->super
->s_jnl_blocks
[16] = inode
.i_size
;
2935 fs
->super
->s_jnl_backup_type
= EXT3_JNL_BACKUP_BLOCKS
;
2936 ext2fs_mark_super_dirty(fs
);
2940 static int calc_group_overhead(ext2_filsys fs
, blk64_t grp
,
2941 int old_desc_blocks
)
2943 blk64_t super_blk
, old_desc_blk
, new_desc_blk
;
2946 /* inode table blocks plus allocation bitmaps */
2947 overhead
= fs
->inode_blocks_per_group
+ 2;
2949 ext2fs_super_and_bgd_loc2(fs
, grp
, &super_blk
,
2950 &old_desc_blk
, &new_desc_blk
, 0);
2951 if ((grp
== 0) || super_blk
)
2954 overhead
+= old_desc_blocks
;
2955 else if (new_desc_blk
)
2962 * calculate the minimum number of blocks the given fs can be resized to
2964 blk64_t
calculate_minimum_resize_size(ext2_filsys fs
, int flags
)
2966 ext2_ino_t inode_count
;
2967 dgrp_t groups
, flex_groups
;
2968 blk64_t blks_needed
, data_blocks
;
2969 blk64_t grp
, data_needed
, last_start
;
2970 blk64_t overhead
= 0;
2971 int old_desc_blocks
;
2972 unsigned flexbg_size
= 1U << fs
->super
->s_log_groups_per_flex
;
2975 * first figure out how many group descriptors we need to
2976 * handle the number of inodes we have
2978 inode_count
= fs
->super
->s_inodes_count
-
2979 fs
->super
->s_free_inodes_count
;
2980 blks_needed
= ext2fs_div_ceil(inode_count
,
2981 fs
->super
->s_inodes_per_group
) *
2982 (blk64_t
) EXT2_BLOCKS_PER_GROUP(fs
->super
);
2983 groups
= ext2fs_div64_ceil(blks_needed
,
2984 EXT2_BLOCKS_PER_GROUP(fs
->super
));
2985 #ifdef RESIZE2FS_DEBUG
2986 if (flags
& RESIZE_DEBUG_MIN_CALC
)
2987 printf("fs has %d inodes, %d groups required.\n",
2988 inode_count
, groups
);
2992 * number of old-style block group descriptor blocks
2994 if (ext2fs_has_feature_meta_bg(fs
->super
))
2995 old_desc_blocks
= fs
->super
->s_first_meta_bg
;
2997 old_desc_blocks
= fs
->desc_blocks
+
2998 fs
->super
->s_reserved_gdt_blocks
;
3000 /* calculate how many blocks are needed for data */
3001 data_needed
= ext2fs_blocks_count(fs
->super
);
3002 for (grp
= 0; grp
< fs
->group_desc_count
; grp
++) {
3003 __u32 n
= ext2fs_bg_free_blocks_count(fs
, grp
);
3005 if (n
> EXT2_BLOCKS_PER_GROUP(fs
->super
))
3006 n
= EXT2_BLOCKS_PER_GROUP(fs
->super
);
3007 n
+= calc_group_overhead(fs
, grp
, old_desc_blocks
);
3008 if (data_needed
< n
) {
3009 if (flags
& RESIZE_DEBUG_MIN_CALC
)
3010 printf("file system appears inconsistent?!?\n");
3011 return ext2fs_blocks_count(fs
->super
);
3015 #ifdef RESIZE2FS_DEBUG
3016 if (flags
& RESIZE_DEBUG_MIN_CALC
)
3017 printf("fs requires %llu data blocks.\n",
3018 (unsigned long long) data_needed
);
3022 * For ext4 we need to allow for up to a flex_bg worth of
3023 * inode tables of slack space so the resize operation can be
3024 * guaranteed to finish.
3026 flex_groups
= groups
;
3027 if (ext2fs_has_feature_flex_bg(fs
->super
)) {
3028 dgrp_t remainder
= groups
& (flexbg_size
- 1);
3030 flex_groups
+= flexbg_size
- remainder
;
3031 if (flex_groups
> fs
->group_desc_count
)
3032 flex_groups
= fs
->group_desc_count
;
3036 * figure out how many data blocks we have given the number of groups
3037 * we need for our inodes
3039 data_blocks
= EXT2_GROUPS_TO_BLOCKS(fs
->super
, groups
);
3041 for (grp
= 0; grp
< flex_groups
; grp
++) {
3042 overhead
= calc_group_overhead(fs
, grp
, old_desc_blocks
);
3045 * we want to keep track of how much data we can store in
3046 * the groups leading up to the last group so we can determine
3047 * how big the last group needs to be
3049 if (grp
< (groups
- 1))
3050 last_start
+= EXT2_BLOCKS_PER_GROUP(fs
->super
) -
3053 if (data_blocks
> overhead
)
3054 data_blocks
-= overhead
;
3058 #ifdef RESIZE2FS_DEBUG
3059 if (flags
& RESIZE_DEBUG_MIN_CALC
)
3060 printf("With %d group(s), we have %llu blocks available.\n",
3061 groups
, (unsigned long long) data_blocks
);
3065 * if we need more group descriptors in order to accommodate our data
3066 * then we need to add them here
3068 blks_needed
= data_needed
;
3069 while (blks_needed
> data_blocks
) {
3070 blk64_t remainder
= blks_needed
- data_blocks
;
3073 /* figure out how many more groups we need for the data */
3074 extra_grps
= ext2fs_div64_ceil(remainder
,
3075 EXT2_BLOCKS_PER_GROUP(fs
->super
));
3077 data_blocks
+= EXT2_GROUPS_TO_BLOCKS(fs
->super
, extra_grps
);
3079 /* ok we have to account for the last group */
3080 overhead
= calc_group_overhead(fs
, groups
-1, old_desc_blocks
);
3081 last_start
+= EXT2_BLOCKS_PER_GROUP(fs
->super
) - overhead
;
3084 groups
+= extra_grps
;
3085 if (!ext2fs_has_feature_flex_bg(fs
->super
))
3086 flex_groups
= groups
;
3087 else if (groups
> flex_groups
) {
3088 dgrp_t r
= groups
& (flexbg_size
- 1);
3090 flex_groups
= groups
+ flexbg_size
- r
;
3091 if (flex_groups
> fs
->group_desc_count
)
3092 flex_groups
= fs
->group_desc_count
;
3095 for (; grp
< flex_groups
; grp
++) {
3096 overhead
= calc_group_overhead(fs
, grp
,
3100 * again, we need to see how much data we cram into
3101 * all of the groups leading up to the last group
3103 if (grp
< groups
- 1)
3104 last_start
+= EXT2_BLOCKS_PER_GROUP(fs
->super
)
3107 data_blocks
-= overhead
;
3110 #ifdef RESIZE2FS_DEBUG
3111 if (flags
& RESIZE_DEBUG_MIN_CALC
)
3112 printf("Added %d extra group(s), "
3113 "blks_needed %llu, data_blocks %llu, "
3114 "last_start %llu\n", extra_grps
,
3115 (unsigned long long) blks_needed
,
3116 (unsigned long long) data_blocks
,
3117 (unsigned long long) last_start
);
3121 /* now for the fun voodoo */
3123 if (ext2fs_has_feature_flex_bg(fs
->super
) &&
3124 (grp
& ~(flexbg_size
- 1)) == 0)
3125 grp
= grp
& ~(flexbg_size
- 1);
3127 for (; grp
< flex_groups
; grp
++)
3128 overhead
+= calc_group_overhead(fs
, grp
, old_desc_blocks
);
3130 #ifdef RESIZE2FS_DEBUG
3131 if (flags
& RESIZE_DEBUG_MIN_CALC
)
3132 printf("Last group's overhead is %llu\n",
3133 (unsigned long long) overhead
);
3137 * if this is the case then the last group is going to have data in it
3138 * so we need to adjust the size of the last group accordingly
3140 if (last_start
< blks_needed
) {
3141 blk64_t remainder
= blks_needed
- last_start
;
3143 #ifdef RESIZE2FS_DEBUG
3144 if (flags
& RESIZE_DEBUG_MIN_CALC
)
3145 printf("Need %llu data blocks in last group\n",
3146 (unsigned long long) remainder
);
3149 * 50 is a magic number that mkfs/resize uses to see if its
3150 * even worth making/resizing the fs. basically you need to
3151 * have at least 50 blocks in addition to the blocks needed
3152 * for the metadata in the last group
3155 overhead
+= remainder
;
3161 overhead
+= fs
->super
->s_first_data_block
;
3162 #ifdef RESIZE2FS_DEBUG
3163 if (flags
& RESIZE_DEBUG_MIN_CALC
)
3164 printf("Final size of last group is %llu\n",
3165 (unsigned long long) overhead
);
3168 /* Add extra slack for bigalloc file systems */
3169 if (EXT2FS_CLUSTER_RATIO(fs
) > 1)
3170 overhead
+= EXT2FS_CLUSTER_RATIO(fs
) * 2;
3173 * since our last group doesn't have to be BLOCKS_PER_GROUP
3174 * large, we only do groups-1, and then add the number of
3175 * blocks needed to handle the group descriptor metadata+data
3178 blks_needed
= EXT2_GROUPS_TO_BLOCKS(fs
->super
, groups
- 1);
3179 blks_needed
+= overhead
;
3182 * Make sure blks_needed covers the end of the inode table in
3183 * the last block group.
3185 overhead
= ext2fs_inode_table_loc(fs
, groups
-1) +
3186 fs
->inode_blocks_per_group
;
3187 if (blks_needed
< overhead
)
3188 blks_needed
= overhead
;
3190 #ifdef RESIZE2FS_DEBUG
3191 if (flags
& RESIZE_DEBUG_MIN_CALC
)
3192 printf("Estimated blocks needed: %llu\n",
3193 (unsigned long long) blks_needed
);
3197 * If at this point we've already added up more "needed" than
3198 * the current size, just return current size as minimum.
3200 if (blks_needed
>= ext2fs_blocks_count(fs
->super
))
3201 return ext2fs_blocks_count(fs
->super
);
3203 * We need to reserve a few extra blocks if extents are
3204 * enabled, in case we need to grow the extent tree. The more
3205 * we shrink the file system, the more space we need.
3207 * The absolute worst case is every single data block is in
3208 * the part of the file system that needs to be evacuated,
3209 * with each data block needs to be in its own extent, and
3210 * with each inode needing at least one extent block.
3212 if (ext2fs_has_feature_extents(fs
->super
)) {
3213 blk64_t safe_margin
= (ext2fs_blocks_count(fs
->super
) -
3215 unsigned int exts_per_blk
= (fs
->blocksize
/
3216 sizeof(struct ext3_extent
)) - 1;
3217 blk64_t worst_case
= ((data_needed
+ exts_per_blk
- 1) /
3220 if (worst_case
< inode_count
)
3221 worst_case
= inode_count
;
3223 if (safe_margin
> worst_case
)
3224 safe_margin
= worst_case
;
3226 #ifdef RESIZE2FS_DEBUG
3227 if (flags
& RESIZE_DEBUG_MIN_CALC
)
3228 printf("Extents safety margin: %llu\n",
3229 (unsigned long long) safe_margin
);
3231 blks_needed
+= safe_margin
;