2 * (C) Copyright 2011 - 2012 Samsung Electronics
3 * EXT4 filesystem implementation in Uboot by
4 * Uma Shankar <uma.shankar@samsung.com>
5 * Manjunatha C Achar <a.manjunatha@samsung.com>
7 * ext4ls and ext4load : Based on ext2 ls and load support in Uboot.
8 * Ext4 read optimization taken from Open-Moko
12 * esd gmbh <www.esd-electronics.com>
13 * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
15 * based on code from grub2 fs/ext2.c and fs/fshelp.c by
16 * GRUB -- GRand Unified Bootloader
17 * Copyright (C) 2003, 2004 Free Software Foundation, Inc.
19 * ext4write : Based on generic ext4 protocol.
21 * SPDX-License-Identifier: GPL-2.0+
26 #include <linux/stat.h>
28 #include "ext4_common.h"
30 static void ext4fs_update(void)
33 ext4fs_update_journal();
34 struct ext_filesystem
*fs
= get_fs();
36 /* update super block */
37 put_ext4((uint64_t)(SUPERBLOCK_SIZE
),
38 (struct ext2_sblock
*)fs
->sb
, (uint32_t)SUPERBLOCK_SIZE
);
40 /* update block groups */
41 for (i
= 0; i
< fs
->no_blkgrp
; i
++) {
42 fs
->bgd
[i
].bg_checksum
= ext4fs_checksum_update(i
);
43 put_ext4((uint64_t)((uint64_t)fs
->bgd
[i
].block_id
* (uint64_t)fs
->blksz
),
44 fs
->blk_bmaps
[i
], fs
->blksz
);
47 /* update inode table groups */
48 for (i
= 0; i
< fs
->no_blkgrp
; i
++) {
49 put_ext4((uint64_t) ((uint64_t)fs
->bgd
[i
].inode_id
* (uint64_t)fs
->blksz
),
50 fs
->inode_bmaps
[i
], fs
->blksz
);
53 /* update the block group descriptor table */
54 put_ext4((uint64_t)((uint64_t)fs
->gdtable_blkno
* (uint64_t)fs
->blksz
),
55 (struct ext2_block_group
*)fs
->gdtable
,
56 (fs
->blksz
* fs
->no_blk_pergdt
));
58 ext4fs_dump_metadata();
64 int ext4fs_get_bgdtable(void)
68 struct ext_filesystem
*fs
= get_fs();
69 grp_desc_size
= sizeof(struct ext2_block_group
);
70 fs
->no_blk_pergdt
= (fs
->no_blkgrp
* grp_desc_size
) / fs
->blksz
;
71 if ((fs
->no_blkgrp
* grp_desc_size
) % fs
->blksz
)
74 /* allocate memory for gdtable */
75 fs
->gdtable
= zalloc(fs
->blksz
* fs
->no_blk_pergdt
);
78 /* read the group descriptor table */
79 status
= ext4fs_devread((lbaint_t
)fs
->gdtable_blkno
* fs
->sect_perblk
,
80 0, fs
->blksz
* fs
->no_blk_pergdt
, fs
->gdtable
);
84 if (ext4fs_log_gdt(fs
->gdtable
)) {
85 printf("Error in ext4fs_log_gdt\n");
97 static void delete_single_indirect_block(struct ext2_inode
*inode
)
99 struct ext2_block_group
*bgd
= NULL
;
100 static int prev_bg_bmap_idx
= -1;
105 unsigned int blk_per_grp
= ext4fs_root
->sblock
.blocks_per_group
;
106 struct ext_filesystem
*fs
= get_fs();
107 char *journal_buffer
= zalloc(fs
->blksz
);
108 if (!journal_buffer
) {
109 printf("No memory\n");
112 /* get block group descriptor table */
113 bgd
= (struct ext2_block_group
*)fs
->gdtable
;
115 /* deleting the single indirect block associated with inode */
116 if (inode
->b
.blocks
.indir_block
!= 0) {
117 debug("SIPB releasing %u\n", inode
->b
.blocks
.indir_block
);
118 blknr
= inode
->b
.blocks
.indir_block
;
119 bg_idx
= blknr
/ blk_per_grp
;
120 if (fs
->blksz
== 1024) {
121 remainder
= blknr
% blk_per_grp
;
125 ext4fs_reset_block_bmap(blknr
, fs
->blk_bmaps
[bg_idx
], bg_idx
);
126 bgd
[bg_idx
].free_blocks
++;
127 fs
->sb
->free_blocks
++;
129 if (prev_bg_bmap_idx
!= bg_idx
) {
131 ext4fs_devread((lbaint_t
)bgd
[bg_idx
].block_id
*
132 fs
->sect_perblk
, 0, fs
->blksz
,
136 if (ext4fs_log_journal
137 (journal_buffer
, bgd
[bg_idx
].block_id
))
139 prev_bg_bmap_idx
= bg_idx
;
143 free(journal_buffer
);
146 static void delete_double_indirect_block(struct ext2_inode
*inode
)
150 static int prev_bg_bmap_idx
= -1;
154 unsigned int blk_per_grp
= ext4fs_root
->sblock
.blocks_per_group
;
155 unsigned int *di_buffer
= NULL
;
156 unsigned int *DIB_start_addr
= NULL
;
157 struct ext2_block_group
*bgd
= NULL
;
158 struct ext_filesystem
*fs
= get_fs();
159 char *journal_buffer
= zalloc(fs
->blksz
);
160 if (!journal_buffer
) {
161 printf("No memory\n");
164 /* get the block group descriptor table */
165 bgd
= (struct ext2_block_group
*)fs
->gdtable
;
167 if (inode
->b
.blocks
.double_indir_block
!= 0) {
168 di_buffer
= zalloc(fs
->blksz
);
170 printf("No memory\n");
173 DIB_start_addr
= (unsigned int *)di_buffer
;
174 blknr
= inode
->b
.blocks
.double_indir_block
;
175 status
= ext4fs_devread((lbaint_t
)blknr
* fs
->sect_perblk
, 0,
176 fs
->blksz
, (char *)di_buffer
);
177 for (i
= 0; i
< fs
->blksz
/ sizeof(int); i
++) {
181 debug("DICB releasing %u\n", *di_buffer
);
182 bg_idx
= *di_buffer
/ blk_per_grp
;
183 if (fs
->blksz
== 1024) {
184 remainder
= *di_buffer
% blk_per_grp
;
188 ext4fs_reset_block_bmap(*di_buffer
,
189 fs
->blk_bmaps
[bg_idx
], bg_idx
);
191 bgd
[bg_idx
].free_blocks
++;
192 fs
->sb
->free_blocks
++;
194 if (prev_bg_bmap_idx
!= bg_idx
) {
195 status
= ext4fs_devread((lbaint_t
)
197 * fs
->sect_perblk
, 0,
203 if (ext4fs_log_journal(journal_buffer
,
204 bgd
[bg_idx
].block_id
))
206 prev_bg_bmap_idx
= bg_idx
;
210 /* removing the parent double indirect block */
211 blknr
= inode
->b
.blocks
.double_indir_block
;
212 bg_idx
= blknr
/ blk_per_grp
;
213 if (fs
->blksz
== 1024) {
214 remainder
= blknr
% blk_per_grp
;
218 ext4fs_reset_block_bmap(blknr
, fs
->blk_bmaps
[bg_idx
], bg_idx
);
219 bgd
[bg_idx
].free_blocks
++;
220 fs
->sb
->free_blocks
++;
222 if (prev_bg_bmap_idx
!= bg_idx
) {
223 memset(journal_buffer
, '\0', fs
->blksz
);
224 status
= ext4fs_devread((lbaint_t
)bgd
[bg_idx
].block_id
*
225 fs
->sect_perblk
, 0, fs
->blksz
,
230 if (ext4fs_log_journal(journal_buffer
,
231 bgd
[bg_idx
].block_id
))
233 prev_bg_bmap_idx
= bg_idx
;
235 debug("DIPB releasing %ld\n", blknr
);
238 free(DIB_start_addr
);
239 free(journal_buffer
);
242 static void delete_triple_indirect_block(struct ext2_inode
*inode
)
246 static int prev_bg_bmap_idx
= -1;
250 unsigned int blk_per_grp
= ext4fs_root
->sblock
.blocks_per_group
;
251 unsigned int *tigp_buffer
= NULL
;
252 unsigned int *tib_start_addr
= NULL
;
253 unsigned int *tip_buffer
= NULL
;
254 unsigned int *tipb_start_addr
= NULL
;
255 struct ext2_block_group
*bgd
= NULL
;
256 struct ext_filesystem
*fs
= get_fs();
257 char *journal_buffer
= zalloc(fs
->blksz
);
258 if (!journal_buffer
) {
259 printf("No memory\n");
262 /* get block group descriptor table */
263 bgd
= (struct ext2_block_group
*)fs
->gdtable
;
265 if (inode
->b
.blocks
.triple_indir_block
!= 0) {
266 tigp_buffer
= zalloc(fs
->blksz
);
268 printf("No memory\n");
271 tib_start_addr
= (unsigned int *)tigp_buffer
;
272 blknr
= inode
->b
.blocks
.triple_indir_block
;
273 status
= ext4fs_devread((lbaint_t
)blknr
* fs
->sect_perblk
, 0,
274 fs
->blksz
, (char *)tigp_buffer
);
275 for (i
= 0; i
< fs
->blksz
/ sizeof(int); i
++) {
276 if (*tigp_buffer
== 0)
278 debug("tigp buffer releasing %u\n", *tigp_buffer
);
280 tip_buffer
= zalloc(fs
->blksz
);
283 tipb_start_addr
= (unsigned int *)tip_buffer
;
284 status
= ext4fs_devread((lbaint_t
)(*tigp_buffer
) *
285 fs
->sect_perblk
, 0, fs
->blksz
,
287 for (j
= 0; j
< fs
->blksz
/ sizeof(int); j
++) {
288 if (*tip_buffer
== 0)
290 bg_idx
= *tip_buffer
/ blk_per_grp
;
291 if (fs
->blksz
== 1024) {
292 remainder
= *tip_buffer
% blk_per_grp
;
297 ext4fs_reset_block_bmap(*tip_buffer
,
298 fs
->blk_bmaps
[bg_idx
],
302 bgd
[bg_idx
].free_blocks
++;
303 fs
->sb
->free_blocks
++;
305 if (prev_bg_bmap_idx
!= bg_idx
) {
309 bgd
[bg_idx
].block_id
*
316 if (ext4fs_log_journal(journal_buffer
,
320 prev_bg_bmap_idx
= bg_idx
;
323 free(tipb_start_addr
);
324 tipb_start_addr
= NULL
;
327 * removing the grand parent blocks
328 * which is connected to inode
330 bg_idx
= *tigp_buffer
/ blk_per_grp
;
331 if (fs
->blksz
== 1024) {
332 remainder
= *tigp_buffer
% blk_per_grp
;
336 ext4fs_reset_block_bmap(*tigp_buffer
,
337 fs
->blk_bmaps
[bg_idx
], bg_idx
);
340 bgd
[bg_idx
].free_blocks
++;
341 fs
->sb
->free_blocks
++;
343 if (prev_bg_bmap_idx
!= bg_idx
) {
344 memset(journal_buffer
, '\0', fs
->blksz
);
346 ext4fs_devread((lbaint_t
)
347 bgd
[bg_idx
].block_id
*
349 fs
->blksz
, journal_buffer
);
353 if (ext4fs_log_journal(journal_buffer
,
354 bgd
[bg_idx
].block_id
))
356 prev_bg_bmap_idx
= bg_idx
;
360 /* removing the grand parent triple indirect block */
361 blknr
= inode
->b
.blocks
.triple_indir_block
;
362 bg_idx
= blknr
/ blk_per_grp
;
363 if (fs
->blksz
== 1024) {
364 remainder
= blknr
% blk_per_grp
;
368 ext4fs_reset_block_bmap(blknr
, fs
->blk_bmaps
[bg_idx
], bg_idx
);
369 bgd
[bg_idx
].free_blocks
++;
370 fs
->sb
->free_blocks
++;
372 if (prev_bg_bmap_idx
!= bg_idx
) {
373 memset(journal_buffer
, '\0', fs
->blksz
);
374 status
= ext4fs_devread((lbaint_t
)bgd
[bg_idx
].block_id
*
375 fs
->sect_perblk
, 0, fs
->blksz
,
380 if (ext4fs_log_journal(journal_buffer
,
381 bgd
[bg_idx
].block_id
))
383 prev_bg_bmap_idx
= bg_idx
;
385 debug("tigp buffer itself releasing %ld\n", blknr
);
388 free(tib_start_addr
);
389 free(tipb_start_addr
);
390 free(journal_buffer
);
393 static int ext4fs_delete_file(int inodeno
)
395 struct ext2_inode inode
;
402 char *read_buffer
= NULL
;
403 char *start_block_address
= NULL
;
404 unsigned int no_blocks
;
406 static int prev_bg_bmap_idx
= -1;
407 unsigned int inodes_per_block
;
410 unsigned int blk_per_grp
= ext4fs_root
->sblock
.blocks_per_group
;
411 unsigned int inode_per_grp
= ext4fs_root
->sblock
.inodes_per_group
;
412 struct ext2_inode
*inode_buffer
= NULL
;
413 struct ext2_block_group
*bgd
= NULL
;
414 struct ext_filesystem
*fs
= get_fs();
415 char *journal_buffer
= zalloc(fs
->blksz
);
418 /* get the block group descriptor table */
419 bgd
= (struct ext2_block_group
*)fs
->gdtable
;
420 status
= ext4fs_read_inode(ext4fs_root
, inodeno
, &inode
);
424 /* read the block no allocated to a file */
425 no_blocks
= inode
.size
/ fs
->blksz
;
426 if (inode
.size
% fs
->blksz
)
429 if (le32_to_cpu(inode
.flags
) & EXT4_EXTENTS_FL
) {
430 struct ext2fs_node
*node_inode
=
431 zalloc(sizeof(struct ext2fs_node
));
434 node_inode
->data
= ext4fs_root
;
435 node_inode
->ino
= inodeno
;
436 node_inode
->inode_read
= 0;
437 memcpy(&(node_inode
->inode
), &inode
, sizeof(struct ext2_inode
));
439 for (i
= 0; i
< no_blocks
; i
++) {
440 blknr
= read_allocated_block(&(node_inode
->inode
), i
);
441 bg_idx
= blknr
/ blk_per_grp
;
442 if (fs
->blksz
== 1024) {
443 remainder
= blknr
% blk_per_grp
;
447 ext4fs_reset_block_bmap(blknr
, fs
->blk_bmaps
[bg_idx
],
449 debug("EXT4_EXTENTS Block releasing %ld: %d\n",
452 bgd
[bg_idx
].free_blocks
++;
453 fs
->sb
->free_blocks
++;
456 if (prev_bg_bmap_idx
!= bg_idx
) {
458 ext4fs_devread((lbaint_t
)
459 bgd
[bg_idx
].block_id
*
461 fs
->blksz
, journal_buffer
);
464 if (ext4fs_log_journal(journal_buffer
,
465 bgd
[bg_idx
].block_id
))
467 prev_bg_bmap_idx
= bg_idx
;
476 delete_single_indirect_block(&inode
);
477 delete_double_indirect_block(&inode
);
478 delete_triple_indirect_block(&inode
);
480 /* read the block no allocated to a file */
481 no_blocks
= inode
.size
/ fs
->blksz
;
482 if (inode
.size
% fs
->blksz
)
484 for (i
= 0; i
< no_blocks
; i
++) {
485 blknr
= read_allocated_block(&inode
, i
);
486 bg_idx
= blknr
/ blk_per_grp
;
487 if (fs
->blksz
== 1024) {
488 remainder
= blknr
% blk_per_grp
;
492 ext4fs_reset_block_bmap(blknr
, fs
->blk_bmaps
[bg_idx
],
494 debug("ActualB releasing %ld: %d\n", blknr
, bg_idx
);
496 bgd
[bg_idx
].free_blocks
++;
497 fs
->sb
->free_blocks
++;
499 if (prev_bg_bmap_idx
!= bg_idx
) {
500 memset(journal_buffer
, '\0', fs
->blksz
);
501 status
= ext4fs_devread((lbaint_t
)
508 if (ext4fs_log_journal(journal_buffer
,
509 bgd
[bg_idx
].block_id
))
511 prev_bg_bmap_idx
= bg_idx
;
516 /* from the inode no to blockno */
517 inodes_per_block
= fs
->blksz
/ fs
->inodesz
;
518 ibmap_idx
= inodeno
/ inode_per_grp
;
520 /* get the block no */
522 blkno
= __le32_to_cpu(bgd
[ibmap_idx
].inode_table_id
) +
523 (inodeno
% __le32_to_cpu(inode_per_grp
)) / inodes_per_block
;
525 /* get the offset of the inode */
526 blkoff
= ((inodeno
) % inodes_per_block
) * fs
->inodesz
;
528 /* read the block no containing the inode */
529 read_buffer
= zalloc(fs
->blksz
);
532 start_block_address
= read_buffer
;
533 status
= ext4fs_devread((lbaint_t
)blkno
* fs
->sect_perblk
,
534 0, fs
->blksz
, read_buffer
);
538 if (ext4fs_log_journal(read_buffer
, blkno
))
541 read_buffer
= read_buffer
+ blkoff
;
542 inode_buffer
= (struct ext2_inode
*)read_buffer
;
543 memset(inode_buffer
, '\0', sizeof(struct ext2_inode
));
545 /* write the inode to original position in inode table */
546 if (ext4fs_put_metadata(start_block_address
, blkno
))
549 /* update the respective inode bitmaps */
551 ext4fs_reset_inode_bmap(inodeno
, fs
->inode_bmaps
[ibmap_idx
], ibmap_idx
);
552 bgd
[ibmap_idx
].free_inodes
++;
553 fs
->sb
->free_inodes
++;
555 memset(journal_buffer
, '\0', fs
->blksz
);
556 status
= ext4fs_devread((lbaint_t
)bgd
[ibmap_idx
].inode_id
*
557 fs
->sect_perblk
, 0, fs
->blksz
, journal_buffer
);
560 if (ext4fs_log_journal(journal_buffer
, bgd
[ibmap_idx
].inode_id
))
565 ext4fs_reinit_global();
567 if (ext4fs_init() != 0) {
568 printf("error in File System init\n");
572 free(start_block_address
);
573 free(journal_buffer
);
577 free(start_block_address
);
578 free(journal_buffer
);
583 int ext4fs_init(void)
587 unsigned int real_free_blocks
= 0;
588 struct ext_filesystem
*fs
= get_fs();
591 fs
->blksz
= EXT2_BLOCK_SIZE(ext4fs_root
);
592 fs
->inodesz
= INODE_SIZE_FILESYSTEM(ext4fs_root
);
593 fs
->sect_perblk
= fs
->blksz
>> fs
->dev_desc
->log2blksz
;
595 /* get the superblock */
596 fs
->sb
= zalloc(SUPERBLOCK_SIZE
);
599 if (!ext4_read_superblock((char *)fs
->sb
))
603 if (ext4fs_init_journal())
606 /* get total no of blockgroups */
607 fs
->no_blkgrp
= (uint32_t)ext4fs_div_roundup(
608 (ext4fs_root
->sblock
.total_blocks
-
609 ext4fs_root
->sblock
.first_data_block
),
610 ext4fs_root
->sblock
.blocks_per_group
);
612 /* get the block group descriptor table */
613 fs
->gdtable_blkno
= ((EXT2_MIN_BLOCK_SIZE
== fs
->blksz
) + 1);
614 if (ext4fs_get_bgdtable() == -1) {
615 printf("Error in getting the block group descriptor table\n");
618 fs
->bgd
= (struct ext2_block_group
*)fs
->gdtable
;
620 /* load all the available bitmap block of the partition */
621 fs
->blk_bmaps
= zalloc(fs
->no_blkgrp
* sizeof(char *));
624 for (i
= 0; i
< fs
->no_blkgrp
; i
++) {
625 fs
->blk_bmaps
[i
] = zalloc(fs
->blksz
);
626 if (!fs
->blk_bmaps
[i
])
630 for (i
= 0; i
< fs
->no_blkgrp
; i
++) {
632 ext4fs_devread((lbaint_t
)fs
->bgd
[i
].block_id
*
634 fs
->blksz
, (char *)fs
->blk_bmaps
[i
]);
639 /* load all the available inode bitmap of the partition */
640 fs
->inode_bmaps
= zalloc(fs
->no_blkgrp
* sizeof(unsigned char *));
641 if (!fs
->inode_bmaps
)
643 for (i
= 0; i
< fs
->no_blkgrp
; i
++) {
644 fs
->inode_bmaps
[i
] = zalloc(fs
->blksz
);
645 if (!fs
->inode_bmaps
[i
])
649 for (i
= 0; i
< fs
->no_blkgrp
; i
++) {
650 status
= ext4fs_devread((lbaint_t
)fs
->bgd
[i
].inode_id
*
653 (char *)fs
->inode_bmaps
[i
]);
659 * check filesystem consistency with free blocks of file system
660 * some time we observed that superblock freeblocks does not match
661 * with the blockgroups freeblocks when improper
662 * reboot of a linux kernel
664 for (i
= 0; i
< fs
->no_blkgrp
; i
++)
665 real_free_blocks
= real_free_blocks
+ fs
->bgd
[i
].free_blocks
;
666 if (real_free_blocks
!= fs
->sb
->free_blocks
)
667 fs
->sb
->free_blocks
= real_free_blocks
;
676 void ext4fs_deinit(void)
679 struct ext2_inode inode_journal
;
680 struct journal_superblock_t
*jsb
;
682 struct ext_filesystem
*fs
= get_fs();
685 char *temp_buff
= zalloc(fs
->blksz
);
687 ext4fs_read_inode(ext4fs_root
, EXT2_JOURNAL_INO
,
689 blknr
= read_allocated_block(&inode_journal
,
690 EXT2_JOURNAL_SUPERBLOCK
);
691 ext4fs_devread((lbaint_t
)blknr
* fs
->sect_perblk
, 0, fs
->blksz
,
693 jsb
= (struct journal_superblock_t
*)temp_buff
;
694 jsb
->s_start
= cpu_to_be32(0);
695 put_ext4((uint64_t) ((uint64_t)blknr
* (uint64_t)fs
->blksz
),
696 (struct journal_superblock_t
*)temp_buff
, fs
->blksz
);
699 ext4fs_free_journal();
701 /* get the superblock */
702 ext4_read_superblock((char *)fs
->sb
);
703 fs
->sb
->feature_incompat
&= ~EXT3_FEATURE_INCOMPAT_RECOVER
;
704 put_ext4((uint64_t)(SUPERBLOCK_SIZE
),
705 (struct ext2_sblock
*)fs
->sb
, (uint32_t)SUPERBLOCK_SIZE
);
710 for (i
= 0; i
< fs
->no_blkgrp
; i
++) {
711 free(fs
->blk_bmaps
[i
]);
712 fs
->blk_bmaps
[i
] = NULL
;
715 fs
->blk_bmaps
= NULL
;
718 if (fs
->inode_bmaps
) {
719 for (i
= 0; i
< fs
->no_blkgrp
; i
++) {
720 free(fs
->inode_bmaps
[i
]);
721 fs
->inode_bmaps
[i
] = NULL
;
723 free(fs
->inode_bmaps
);
724 fs
->inode_bmaps
= NULL
;
732 * reinitiliazed the global inode and
733 * block bitmap first execution check variables
735 fs
->first_pass_ibmap
= 0;
736 fs
->first_pass_bbmap
= 0;
737 fs
->curr_inode_no
= 0;
741 static int ext4fs_write_file(struct ext2_inode
*file_inode
,
742 int pos
, unsigned int len
, char *buf
)
746 unsigned int filesize
= __le32_to_cpu(file_inode
->size
);
747 struct ext_filesystem
*fs
= get_fs();
748 int log2blksz
= fs
->dev_desc
->log2blksz
;
749 int log2_fs_blocksize
= LOG2_BLOCK_SIZE(ext4fs_root
) - log2blksz
;
750 int previous_block_number
= -1;
751 int delayed_start
= 0;
752 int delayed_extent
= 0;
753 int delayed_next
= 0;
754 char *delayed_buf
= NULL
;
756 /* Adjust len so it we can't read past the end of the file. */
760 blockcnt
= ((len
+ pos
) + fs
->blksz
- 1) / fs
->blksz
;
762 for (i
= pos
/ fs
->blksz
; i
< blockcnt
; i
++) {
764 int blockend
= fs
->blksz
;
766 blknr
= read_allocated_block(file_inode
, i
);
770 blknr
= blknr
<< log2_fs_blocksize
;
773 if (previous_block_number
!= -1) {
774 if (delayed_next
== blknr
) {
775 delayed_extent
+= blockend
;
776 delayed_next
+= blockend
>> log2blksz
;
779 ((uint64_t)delayed_start
<< log2blksz
),
781 (uint32_t) delayed_extent
);
782 previous_block_number
= blknr
;
783 delayed_start
= blknr
;
784 delayed_extent
= blockend
;
786 delayed_next
= blknr
+
787 (blockend
>> log2blksz
);
790 previous_block_number
= blknr
;
791 delayed_start
= blknr
;
792 delayed_extent
= blockend
;
794 delayed_next
= blknr
+
795 (blockend
>> log2blksz
);
798 if (previous_block_number
!= -1) {
800 put_ext4((uint64_t) ((uint64_t)delayed_start
<<
803 (uint32_t) delayed_extent
);
804 previous_block_number
= -1;
806 memset(buf
, 0, fs
->blksz
- skipfirst
);
808 buf
+= fs
->blksz
- skipfirst
;
810 if (previous_block_number
!= -1) {
812 put_ext4((uint64_t) ((uint64_t)delayed_start
<< log2blksz
),
813 delayed_buf
, (uint32_t) delayed_extent
);
814 previous_block_number
= -1;
820 int ext4fs_write(const char *fname
, unsigned char *buffer
,
821 unsigned long sizebytes
)
824 struct ext2_inode
*file_inode
= NULL
;
825 unsigned char *inode_buffer
= NULL
;
828 time_t timestamp
= 0;
830 uint64_t bytes_reqd_for_file
;
831 unsigned int blks_reqd_for_file
;
832 unsigned int blocks_remaining
;
833 int existing_file_inodeno
;
834 char *temp_ptr
= NULL
;
835 long int itable_blkno
;
836 long int parent_itable_blkno
;
838 struct ext2_sblock
*sblock
= &(ext4fs_root
->sblock
);
839 unsigned int inodes_per_block
;
840 unsigned int ibmap_idx
;
841 struct ext_filesystem
*fs
= get_fs();
842 ALLOC_CACHE_ALIGN_BUFFER(char, filename
, 256);
843 memset(filename
, 0x00, 256);
845 g_parent_inode
= zalloc(sizeof(struct ext2_inode
));
849 if (ext4fs_init() != 0) {
850 printf("error in File System init\n");
853 inodes_per_block
= fs
->blksz
/ fs
->inodesz
;
854 parent_inodeno
= ext4fs_get_parent_inode_num(fname
, filename
, F_FILE
);
855 if (parent_inodeno
== -1)
857 if (ext4fs_iget(parent_inodeno
, g_parent_inode
))
859 /* check if the filename is already present in root */
860 existing_file_inodeno
= ext4fs_filename_check(filename
);
861 if (existing_file_inodeno
!= -1) {
862 ret
= ext4fs_delete_file(existing_file_inodeno
);
863 fs
->first_pass_bbmap
= 0;
866 fs
->first_pass_ibmap
= 0;
867 fs
->curr_inode_no
= 0;
871 /* calucalate how many blocks required */
872 bytes_reqd_for_file
= sizebytes
;
873 blks_reqd_for_file
= lldiv(bytes_reqd_for_file
, fs
->blksz
);
874 if (do_div(bytes_reqd_for_file
, fs
->blksz
) != 0) {
875 blks_reqd_for_file
++;
876 debug("total bytes for a file %u\n", blks_reqd_for_file
);
878 blocks_remaining
= blks_reqd_for_file
;
879 /* test for available space in partition */
880 if (fs
->sb
->free_blocks
< blks_reqd_for_file
) {
881 printf("Not enough space on partition !!!\n");
885 ext4fs_update_parent_dentry(filename
, &inodeno
, FILETYPE_REG
);
886 /* prepare file inode */
887 inode_buffer
= zalloc(fs
->inodesz
);
890 file_inode
= (struct ext2_inode
*)inode_buffer
;
891 file_inode
->mode
= S_IFREG
| S_IRWXU
|
892 S_IRGRP
| S_IROTH
| S_IXGRP
| S_IXOTH
;
893 /* ToDo: Update correct time */
894 file_inode
->mtime
= timestamp
;
895 file_inode
->atime
= timestamp
;
896 file_inode
->ctime
= timestamp
;
897 file_inode
->nlinks
= 1;
898 file_inode
->size
= sizebytes
;
900 /* Allocate data blocks */
901 ext4fs_allocate_blocks(file_inode
, blocks_remaining
,
902 &blks_reqd_for_file
);
903 file_inode
->blockcnt
= (blks_reqd_for_file
* fs
->blksz
) >>
904 fs
->dev_desc
->log2blksz
;
906 temp_ptr
= zalloc(fs
->blksz
);
909 ibmap_idx
= inodeno
/ ext4fs_root
->sblock
.inodes_per_group
;
911 itable_blkno
= __le32_to_cpu(fs
->bgd
[ibmap_idx
].inode_table_id
) +
912 (inodeno
% __le32_to_cpu(sblock
->inodes_per_group
)) /
914 blkoff
= (inodeno
% inodes_per_block
) * fs
->inodesz
;
915 ext4fs_devread((lbaint_t
)itable_blkno
* fs
->sect_perblk
, 0, fs
->blksz
,
917 if (ext4fs_log_journal(temp_ptr
, itable_blkno
))
920 memcpy(temp_ptr
+ blkoff
, inode_buffer
, fs
->inodesz
);
921 if (ext4fs_put_metadata(temp_ptr
, itable_blkno
))
923 /* copy the file content into data blocks */
924 if (ext4fs_write_file(file_inode
, 0, sizebytes
, (char *)buffer
) == -1) {
925 printf("Error in copying content\n");
928 ibmap_idx
= parent_inodeno
/ ext4fs_root
->sblock
.inodes_per_group
;
930 parent_itable_blkno
= __le32_to_cpu(fs
->bgd
[ibmap_idx
].inode_table_id
) +
932 __le32_to_cpu(sblock
->inodes_per_group
)) / inodes_per_block
;
933 blkoff
= (parent_inodeno
% inodes_per_block
) * fs
->inodesz
;
934 if (parent_itable_blkno
!= itable_blkno
) {
935 memset(temp_ptr
, '\0', fs
->blksz
);
936 ext4fs_devread((lbaint_t
)parent_itable_blkno
* fs
->sect_perblk
,
937 0, fs
->blksz
, temp_ptr
);
938 if (ext4fs_log_journal(temp_ptr
, parent_itable_blkno
))
941 memcpy(temp_ptr
+ blkoff
, g_parent_inode
,
942 sizeof(struct ext2_inode
));
943 if (ext4fs_put_metadata(temp_ptr
, parent_itable_blkno
))
948 * If parent and child fall in same inode table block
949 * both should be kept in 1 buffer
951 memcpy(temp_ptr
+ blkoff
, g_parent_inode
,
952 sizeof(struct ext2_inode
));
954 if (ext4fs_put_metadata(temp_ptr
, itable_blkno
))
961 fs
->first_pass_bbmap
= 0;
963 fs
->first_pass_ibmap
= 0;
964 fs
->curr_inode_no
= 0;
966 free(g_parent_inode
);
967 g_parent_inode
= NULL
;
973 free(g_parent_inode
);
974 g_parent_inode
= NULL
;
979 int ext4_write_file(const char *filename
, void *buf
, loff_t offset
,
980 loff_t len
, loff_t
*actwrite
)
985 printf("** Cannot support non-zero offset **\n");
989 /* mount the filesystem */
990 if (!ext4fs_mount(0)) {
991 printf("** Error Bad ext4 partition **\n");
995 ret
= ext4fs_write(filename
, buf
, len
);
998 printf("** Error ext4fs_write() **\n");