+++ /dev/null
---- a/fs/squashfs/Kconfig
-+++ b/fs/squashfs/Kconfig
-@@ -1,7 +1,8 @@
- config SQUASHFS
- tristate "SquashFS 4.0 - Squashed file system support"
- depends on BLOCK
-- select ZLIB_INFLATE
-+ select CRYPTO
-+ select CRYPTO_ZLIB
- help
- Saying Y here includes support for SquashFS 4.0 (a Compressed
- Read-Only File System). Squashfs is a highly compressed read-only
---- a/fs/squashfs/block.c
-+++ b/fs/squashfs/block.c
-@@ -32,7 +32,8 @@
- #include <linux/mutex.h>
- #include <linux/string.h>
- #include <linux/buffer_head.h>
--#include <linux/zlib.h>
-+
-+#include <crypto/compress.h>
-
- #include "squashfs_fs.h"
- #include "squashfs_fs_sb.h"
-@@ -153,7 +154,8 @@ int squashfs_read_data(struct super_bloc
- }
-
- if (compressed) {
-- int zlib_err = 0, zlib_init = 0;
-+ int res = 0, decomp_init = 0;
-+ struct comp_request req;
-
- /*
- * Uncompress block.
-@@ -161,12 +163,13 @@ int squashfs_read_data(struct super_bloc
-
- mutex_lock(&msblk->read_data_mutex);
-
-- msblk->stream.avail_out = 0;
-- msblk->stream.avail_in = 0;
-+ req.avail_out = 0;
-+ req.avail_in = 0;
-
- bytes = length;
-+ length = 0;
- do {
-- if (msblk->stream.avail_in == 0 && k < b) {
-+ if (req.avail_in == 0 && k < b) {
- avail = min(bytes, msblk->devblksize - offset);
- bytes -= avail;
- wait_on_buffer(bh[k]);
-@@ -179,45 +182,47 @@ int squashfs_read_data(struct super_bloc
- continue;
- }
-
-- msblk->stream.next_in = bh[k]->b_data + offset;
-- msblk->stream.avail_in = avail;
-+ req.next_in = bh[k]->b_data + offset;
-+ req.avail_in = avail;
- offset = 0;
- }
-
-- if (msblk->stream.avail_out == 0 && page < pages) {
-- msblk->stream.next_out = buffer[page++];
-- msblk->stream.avail_out = PAGE_CACHE_SIZE;
-+ if (req.avail_out == 0 && page < pages) {
-+ req.next_out = buffer[page++];
-+ req.avail_out = PAGE_CACHE_SIZE;
- }
-
-- if (!zlib_init) {
-- zlib_err = zlib_inflateInit(&msblk->stream);
-- if (zlib_err != Z_OK) {
-- ERROR("zlib_inflateInit returned"
-- " unexpected result 0x%x,"
-- " srclength %d\n", zlib_err,
-- srclength);
-+ if (!decomp_init) {
-+ res = crypto_decompress_init(msblk->tfm);
-+ if (res) {
-+ ERROR("crypto_decompress_init "
-+ "returned %d, srclength %d\n",
-+ res, srclength);
- goto release_mutex;
- }
-- zlib_init = 1;
-+ decomp_init = 1;
- }
-
-- zlib_err = zlib_inflate(&msblk->stream, Z_SYNC_FLUSH);
-+ res = crypto_decompress_update(msblk->tfm, &req);
-+ if (res < 0) {
-+ ERROR("crypto_decompress_update returned %d, "
-+ "data probably corrupt\n", res);
-+ goto release_mutex;
-+ }
-+ length += res;
-
-- if (msblk->stream.avail_in == 0 && k < b)
-+ if (req.avail_in == 0 && k < b)
- put_bh(bh[k++]);
-- } while (zlib_err == Z_OK);
-+ } while (bytes || res);
-
-- if (zlib_err != Z_STREAM_END) {
-- ERROR("zlib_inflate error, data probably corrupt\n");
-+ res = crypto_decompress_final(msblk->tfm, &req);
-+ if (res < 0) {
-+ ERROR("crypto_decompress_final returned %d, data "
-+ "probably corrupt\n", res);
- goto release_mutex;
- }
-+ length += res;
-
-- zlib_err = zlib_inflateEnd(&msblk->stream);
-- if (zlib_err != Z_OK) {
-- ERROR("zlib_inflate error, data probably corrupt\n");
-- goto release_mutex;
-- }
-- length = msblk->stream.total_out;
- mutex_unlock(&msblk->read_data_mutex);
- } else {
- /*
---- a/fs/squashfs/squashfs_fs_sb.h
-+++ b/fs/squashfs/squashfs_fs_sb.h
-@@ -64,7 +64,7 @@ struct squashfs_sb_info {
- struct mutex read_data_mutex;
- struct mutex meta_index_mutex;
- struct meta_index *meta_index;
-- z_stream stream;
-+ struct crypto_pcomp *tfm;
- __le64 *inode_lookup_table;
- u64 inode_table;
- u64 directory_table;
---- a/fs/squashfs/super.c
-+++ b/fs/squashfs/super.c
-@@ -37,11 +37,19 @@
- #include <linux/zlib.h>
- #include <linux/magic.h>
-
-+#include <crypto/compress.h>
-+
-+#include <net/netlink.h>
-+
- #include "squashfs_fs.h"
- #include "squashfs_fs_sb.h"
- #include "squashfs_fs_i.h"
- #include "squashfs.h"
-
-+
-+#define SQUASHFS_CRYPTO_ALG "zlib"
-+
-+
- static struct file_system_type squashfs_fs_type;
- static struct super_operations squashfs_super_ops;
-
-@@ -75,6 +83,16 @@ static int squashfs_fill_super(struct su
- unsigned short flags;
- unsigned int fragments;
- u64 lookup_table_start;
-+ struct {
-+ struct nlattr nla;
-+ int val;
-+ } params = {
-+ .nla = {
-+ .nla_len = nla_attr_size(sizeof(int)),
-+ .nla_type = ZLIB_DECOMP_WINDOWBITS,
-+ },
-+ .val = DEF_WBITS,
-+ };
- int err;
-
- TRACE("Entered squashfs_fill_superblock\n");
-@@ -86,16 +104,25 @@ static int squashfs_fill_super(struct su
- }
- msblk = sb->s_fs_info;
-
-- msblk->stream.workspace = kmalloc(zlib_inflate_workspacesize(),
-- GFP_KERNEL);
-- if (msblk->stream.workspace == NULL) {
-- ERROR("Failed to allocate zlib workspace\n");
-+ msblk->tfm = crypto_alloc_pcomp(SQUASHFS_CRYPTO_ALG, 0,
-+ CRYPTO_ALG_ASYNC);
-+ if (IS_ERR(msblk->tfm)) {
-+ ERROR("Failed to load %s crypto module\n",
-+ SQUASHFS_CRYPTO_ALG);
-+ err = PTR_ERR(msblk->tfm);
-+ goto failed_pcomp;
-+ }
-+
-+ err = crypto_decompress_setup(msblk->tfm, ¶ms, sizeof(params));
-+ if (err) {
-+ ERROR("Failed to set up decompression parameters\n");
- goto failure;
- }
-
- sblk = kzalloc(sizeof(*sblk), GFP_KERNEL);
- if (sblk == NULL) {
- ERROR("Failed to allocate squashfs_super_block\n");
-+ err = -ENOMEM;
- goto failure;
- }
-
-@@ -294,17 +321,18 @@ failed_mount:
- kfree(msblk->inode_lookup_table);
- kfree(msblk->fragment_index);
- kfree(msblk->id_table);
-- kfree(msblk->stream.workspace);
-+ crypto_free_pcomp(msblk->tfm);
- kfree(sb->s_fs_info);
- sb->s_fs_info = NULL;
- kfree(sblk);
- return err;
-
- failure:
-- kfree(msblk->stream.workspace);
-+ crypto_free_pcomp(msblk->tfm);
-+failed_pcomp:
- kfree(sb->s_fs_info);
- sb->s_fs_info = NULL;
-- return -ENOMEM;
-+ return err;
- }
-
-
-@@ -346,7 +374,7 @@ static void squashfs_put_super(struct su
- kfree(sbi->id_table);
- kfree(sbi->fragment_index);
- kfree(sbi->meta_index);
-- kfree(sbi->stream.workspace);
-+ crypto_free_pcomp(sbi->tfm);
- kfree(sb->s_fs_info);
- sb->s_fs_info = NULL;
- }
projects / openwrt / svn-archive / archive.git / blobdiff