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fs/squashfs: add support for zlib decompression 

Add call to zlib's 'uncompress' function. Add function to display the
right error message depending on the decompression's return value.

Signed-off-by: Joao Marcos Costa <joaomarcos.costa@bootlin.com>
This commit is contained in:
Joao Marcos Costa 2020-07-30 15:33:50 +02:00 committed by Tom Rini
parent 81014f73f0
commit 3634b35089
1 changed files with 30 additions and 0 deletions
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30
fs/squashfs/sqfs_decompressor.c
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@ -9,17 +9,47 @@
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#if IS_ENABLED(CONFIG_ZLIB)
#include <u-boot/zlib.h>
#endif
#include "sqfs_decompressor.h"
#include "sqfs_filesystem.h"
#include "sqfs_utils.h"
#if IS_ENABLED(CONFIG_ZLIB)
static void zlib_decompression_status(int ret)
{
switch (ret) {
case Z_BUF_ERROR:
printf("Error: 'dest' buffer is not large enough.\n");
break;
case Z_DATA_ERROR:
printf("Error: corrupted compressed data.\n");
break;
case Z_MEM_ERROR:
printf("Error: insufficient memory.\n");
break;
}
}
#endif
int sqfs_decompress(u16 comp_type, void *dest, unsigned long *dest_len,
void *source, u32 lenp)
{
int ret = 0;
switch (comp_type) {
#if IS_ENABLED(CONFIG_ZLIB)
case SQFS_COMP_ZLIB:
ret = uncompress(dest, dest_len, source, lenp);
if (ret) {
zlib_decompression_status(ret);
return -EINVAL;
}
break;
#endif
default:
printf("Error: unknown compression type.\n");
return -EINVAL;