static int decompress_lzo(unsigned char *inbuf, char *outbuf, u64 compress_len,
u64 *decompress_len)
{
size_t new_len;
size_t in_len;
size_t out_len = 0;
size_t tot_len;
size_t tot_in;
int ret;
ret = lzo_init();
if (ret != LZO_E_OK) {
fprintf(stderr, "lzo init returned %d\n", ret);
return -1;
}
tot_len = read_compress_length(inbuf);
inbuf += LZO_LEN;
tot_in = LZO_LEN;
while (tot_in < tot_len) {
in_len = read_compress_length(inbuf);
if ((tot_in + LZO_LEN + in_len) > tot_len) {
fprintf(stderr, "bad compress length %lu\n",
(unsigned long)in_len);
return -1;
}
inbuf += LZO_LEN;
tot_in += LZO_LEN;
new_len = lzo1x_worst_compress(PAGE_CACHE_SIZE);
ret = lzo1x_decompress_safe((const unsigned char *)inbuf, in_len,
(unsigned char *)outbuf,
(void *)&new_len, NULL);
if (ret != LZO_E_OK) {
fprintf(stderr, "failed to inflate: %d\n", ret);
return -1;
}
out_len += new_len;
outbuf += new_len;
inbuf += in_len;
tot_in += in_len;
}
*decompress_len = out_len;
return 0;
}
static int decompress_lzo(unsigned char *inbuf, char *outbuf, u64 compress_len,
u64 *decompress_len)
{
size_t new_len;
size_t in_len;
size_t out_len = 0;
size_t tot_len;
size_t tot_in;
int ret;
ret = lzo_init();
if (ret != LZO_E_OK) {
fprintf(stderr, "lzo init returned %d\n", ret);
return -1;
}
tot_len = read_compress_length(inbuf);
inbuf += LZO_LEN;
tot_in = LZO_LEN;
while (tot_in < tot_len) {
size_t mod_page;
size_t rem_page;
in_len = read_compress_length(inbuf);
if ((tot_in + LZO_LEN + in_len) > tot_len) {
fprintf(stderr, "bad compress length %lu\n",
(unsigned long)in_len);
return -1;
}
inbuf += LZO_LEN;
tot_in += LZO_LEN;
new_len = lzo1x_worst_compress(PAGE_CACHE_SIZE);
ret = lzo1x_decompress_safe((const unsigned char *)inbuf, in_len,
(unsigned char *)outbuf,
(void *)&new_len, NULL);
if (ret != LZO_E_OK) {
fprintf(stderr, "failed to inflate: %d\n", ret);
return -1;
}
out_len += new_len;
outbuf += new_len;
inbuf += in_len;
tot_in += in_len;
/*
* If the 4 byte header does not fit to the rest of the page we
* have to move to the next one, unless we read some garbage
*/
mod_page = tot_in % PAGE_CACHE_SIZE;
rem_page = PAGE_CACHE_SIZE - mod_page;
if (rem_page < LZO_LEN) {
inbuf += rem_page;
tot_in += rem_page;
}
}
*decompress_len = out_len;
return 0;
}
static int decompress_lzo(struct btrfs_root *root, unsigned char *inbuf,
char *outbuf, u64 compress_len, u64 *decompress_len)
{
size_t new_len;
size_t in_len;
size_t out_len = 0;
size_t tot_len;
size_t tot_in;
int ret;
ret = lzo_init();
if (ret != LZO_E_OK) {
error("lzo init returned %d", ret);
return -1;
}
tot_len = read_compress_length(inbuf);
inbuf += LZO_LEN;
tot_in = LZO_LEN;
while (tot_in < tot_len) {
size_t mod_page;
size_t rem_page;
in_len = read_compress_length(inbuf);
if ((tot_in + LZO_LEN + in_len) > tot_len) {
error("bad compress length %lu",
(unsigned long)in_len);
return -1;
}
inbuf += LZO_LEN;
tot_in += LZO_LEN;
new_len = lzo1x_worst_compress(root->fs_info->sectorsize);
ret = lzo1x_decompress_safe((const unsigned char *)inbuf, in_len,
(unsigned char *)outbuf,
(void *)&new_len, NULL);
if (ret != LZO_E_OK) {
error("lzo decompress failed: %d", ret);
return -1;
}
out_len += new_len;
outbuf += new_len;
inbuf += in_len;
tot_in += in_len;
/*
* If the 4 byte header does not fit to the rest of the page we
* have to move to the next one, unless we read some garbage
*/
mod_page = tot_in % root->fs_info->sectorsize;
rem_page = root->fs_info->sectorsize - mod_page;
if (rem_page < LZO_LEN) {
inbuf += rem_page;
tot_in += rem_page;
}
}
*decompress_len = out_len;
return 0;
}
