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ext4: fix endianess problems in ext4 write support

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All fields were accessed directly instead of using the proper byte swap
functions. Thus, ext4 write support was only usable on little-endian
architectures. Fix this.

Signed-off-by: Michael Walle <michael@walle.cc>
This commit is contained in:
Michael Walle
2016-09-01 11:21:40 +02:00
committed by Tom Rini
parent 7f101be314
commit 58a9ecbaf4
6 changed files with 311 additions and 250 deletions
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15
fs/ext4/ext4_journal.c
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@@ -151,7 +151,7 @@ int ext4fs_log_gdt(char *gd_table)
* journal_buffer -- Buffer containing meta data
* blknr -- Block number on disk of the meta data buffer
*/
int ext4fs_log_journal(char *journal_buffer, long int blknr)
int ext4fs_log_journal(char *journal_buffer, uint32_t blknr)
{
struct ext_filesystem *fs = get_fs();
short i;
@@ -183,7 +183,7 @@ int ext4fs_log_journal(char *journal_buffer, long int blknr)
* metadata_buffer -- Buffer containing meta data
* blknr -- Block number on disk of the meta data buffer
*/
int ext4fs_put_metadata(char *metadata_buffer, long int blknr)
int ext4fs_put_metadata(char *metadata_buffer, uint32_t blknr)
{
struct ext_filesystem *fs = get_fs();
if (!metadata_buffer) {
@@ -215,7 +215,7 @@ void print_revoke_blks(char *revk_blk)
printf("total bytes %d\n", max);
while (offset < max) {
blocknr = be32_to_cpu(*((long int *)(revk_blk + offset)));
blocknr = be32_to_cpu(*((__be32 *)(revk_blk + offset)));
printf("revoke blknr is %ld\n", blocknr);
offset += 4;
}
@@ -302,7 +302,7 @@ int check_blknr_for_revoke(long int blknr, int sequence_no)
max = be32_to_cpu(header->r_count);
while (offset < max) {
blocknr = be32_to_cpu(*((long int *)
blocknr = be32_to_cpu(*((__be32 *)
(revk_blk + offset)));
if (blocknr == blknr)
goto found;
@@ -420,7 +420,7 @@ int ext4fs_check_journal_state(int recovery_flag)
temp_buff);
jsb = (struct journal_superblock_t *) temp_buff;
if (fs->sb->feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
if (le32_to_cpu(fs->sb->feature_incompat) & EXT3_FEATURE_INCOMPAT_RECOVER) {
if (recovery_flag == RECOVER)
printf("Recovery required\n");
} else {
@@ -517,11 +517,14 @@ int ext4fs_check_journal_state(int recovery_flag)
end:
if (recovery_flag == RECOVER) {
uint32_t new_feature_incompat;
jsb->s_start = cpu_to_be32(1);
jsb->s_sequence = cpu_to_be32(be32_to_cpu(jsb->s_sequence) + 1);
/* get the superblock */
ext4_read_superblock((char *)fs->sb);
fs->sb->feature_incompat |= EXT3_FEATURE_INCOMPAT_RECOVER;
new_feature_incompat = le32_to_cpu(fs->sb->feature_incompat);
new_feature_incompat |= EXT3_FEATURE_INCOMPAT_RECOVER;
fs->sb->feature_incompat = cpu_to_le32(new_feature_incompat);
/* Update the super block */
put_ext4((uint64_t) (SUPERBLOCK_SIZE),