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fs/squashfs: replace sqfs_decompress() parameter

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Replace 'u16 comp_type' by a reference to squashfs_ctxt structure.

Signed-off-by: Joao Marcos Costa <joaomarcos.costa@bootlin.com>
This commit is contained in:
Joao Marcos Costa 2020-08-18 17:17:22 +02:00 committed by Tom Rini
parent 10f7cf5f12
commit cdc114415c
3 changed files with 14 additions and 20 deletions
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25
fs/squashfs/sqfs.c
View file

@ -104,9 +104,7 @@ static int sqfs_frag_lookup(u32 inode_fragment_index,
struct squashfs_super_block *sblk = ctxt.sblk;
unsigned long dest_len;
int block, offset, ret;
u16 header, comp_type;
comp_type = get_unaligned_le16(&sblk->compression);
u16 header;
if (inode_fragment_index >= get_unaligned_le32(&sblk->fragments))
return -EINVAL;
@ -165,7 +163,7 @@ static int sqfs_frag_lookup(u32 inode_fragment_index,
if (SQFS_COMPRESSED_METADATA(header)) {
src_len = SQFS_METADATA_SIZE(header);
dest_len = SQFS_METADATA_BLOCK_SIZE;
ret = sqfs_decompress(comp_type, entries, &dest_len, metadata,
ret = sqfs_decompress(&ctxt, entries, &dest_len, metadata,
src_len);
if (ret) {
ret = -EINVAL;
@ -629,13 +627,12 @@ static int sqfs_read_inode_table(unsigned char **inode_table)
{
struct squashfs_super_block *sblk = ctxt.sblk;
u64 start, n_blks, table_offset, table_size;
int j, ret = 0, metablks_count, comp_type;
int j, ret = 0, metablks_count;
unsigned char *src_table, *itb;
u32 src_len, dest_offset = 0;
unsigned long dest_len;
bool compressed;
comp_type = get_unaligned_le16(&sblk->compression);
table_size = get_unaligned_le64(&sblk->directory_table_start) -
get_unaligned_le64(&sblk->inode_table_start);
start = get_unaligned_le64(&sblk->inode_table_start) /
@ -680,7 +677,7 @@ static int sqfs_read_inode_table(unsigned char **inode_table)
sqfs_read_metablock(itb, table_offset, &compressed, &src_len);
if (compressed) {
dest_len = SQFS_METADATA_BLOCK_SIZE;
ret = sqfs_decompress(comp_type, *inode_table +
ret = sqfs_decompress(&ctxt, *inode_table +
dest_offset, &dest_len,
src_table, src_len);
if (ret) {
@ -711,15 +708,13 @@ free_itb:
static int sqfs_read_directory_table(unsigned char **dir_table, u32 **pos_list)
{
u64 start, n_blks, table_offset, table_size;
int j, ret = 0, metablks_count = -1, comp_type;
struct squashfs_super_block *sblk = ctxt.sblk;
int j, ret = 0, metablks_count = -1;
unsigned char *src_table, *dtb;
u32 src_len, dest_offset = 0;
unsigned long dest_len;
bool compressed;
comp_type = get_unaligned_le16(&sblk->compression);
/* DIRECTORY TABLE */
table_size = get_unaligned_le64(&sblk->fragment_table_start) -
get_unaligned_le64(&sblk->directory_table_start);
@ -773,7 +768,7 @@ static int sqfs_read_directory_table(unsigned char **dir_table, u32 **pos_list)
sqfs_read_metablock(dtb, table_offset, &compressed, &src_len);
if (compressed) {
dest_len = SQFS_METADATA_BLOCK_SIZE;
ret = sqfs_decompress(comp_type, *dir_table +
ret = sqfs_decompress(&ctxt, *dir_table +
(j * SQFS_METADATA_BLOCK_SIZE),
&dest_len, src_table, src_len);
if (ret) {
@ -1197,7 +1192,7 @@ int sqfs_read(const char *filename, void *buf, loff_t offset, loff_t len,
char *dir, *fragment_block, *datablock = NULL, *data_buffer = NULL;
char *fragment, *file, *resolved, *data;
u64 start, n_blks, table_size, data_offset, table_offset;
int ret, j, i_number, comp_type, datablk_count = 0;
int ret, j, i_number, datablk_count = 0;
struct squashfs_super_block *sblk = ctxt.sblk;
struct squashfs_fragment_block_entry frag_entry;
struct squashfs_file_info finfo = {0};
@ -1213,8 +1208,6 @@ int sqfs_read(const char *filename, void *buf, loff_t offset, loff_t len,
*actread = 0;
comp_type = get_unaligned_le16(&sblk->compression);
/*
* sqfs_opendir will uncompress inode and directory tables, and will
* return a pointer to the directory that contains the requested file.
@ -1346,7 +1339,7 @@ int sqfs_read(const char *filename, void *buf, loff_t offset, loff_t len,
/* Load the data */
if (SQFS_COMPRESSED_BLOCK(finfo.blk_sizes[j])) {
dest_len = get_unaligned_le32(&sblk->block_size);
ret = sqfs_decompress(comp_type, datablock, &dest_len,
ret = sqfs_decompress(&ctxt, datablock, &dest_len,
data, table_size);
if (ret)
goto free_buffer;
@ -1396,7 +1389,7 @@ int sqfs_read(const char *filename, void *buf, loff_t offset, loff_t len,
goto free_fragment;
}
ret = sqfs_decompress(comp_type, fragment_block, &dest_len,
ret = sqfs_decompress(&ctxt, fragment_block, &dest_len,
(void *)fragment + table_offset,
frag_entry.size);
if (ret) {

5
fs/squashfs/sqfs_decompressor.c
View file

@ -62,9 +62,10 @@ static void zlib_decompression_status(int ret)
}
#endif
int sqfs_decompress(u16 comp_type, void *dest, unsigned long *dest_len,
void *source, u32 src_len)
int sqfs_decompress(struct squashfs_ctxt *ctxt, void *dest,
unsigned long *dest_len, void *source, u32 src_len)
{
u16 comp_type = get_unaligned_le16(&ctxt->sblk->compression);
int ret = 0;
switch (comp_type) {

4
fs/squashfs/sqfs_decompressor.h
View file

@ -53,8 +53,8 @@ union squashfs_compression_opts {
struct squashfs_lzo_opts *lzo;
};
int sqfs_decompress(u16 comp_type, void *dest, unsigned long *dest_len,
void *source, u32 lenp);
int sqfs_decompress(struct squashfs_ctxt *ctxt, void *dest,
unsigned long *dest_len, void *source, u32 src_len);
int sqfs_decompressor_init(struct squashfs_ctxt *ctxt);
void sqfs_decompressor_cleanup(struct squashfs_ctxt *ctxt);