diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/squashfs/lzo_wrapper.c')
-rw-r--r-- | ANDROID_3.4.5/fs/squashfs/lzo_wrapper.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/ANDROID_3.4.5/fs/squashfs/lzo_wrapper.c b/ANDROID_3.4.5/fs/squashfs/lzo_wrapper.c deleted file mode 100644 index 00f4dfc5..00000000 --- a/ANDROID_3.4.5/fs/squashfs/lzo_wrapper.c +++ /dev/null @@ -1,135 +0,0 @@ -/* - * Squashfs - a compressed read only filesystem for Linux - * - * Copyright (c) 2010 LG Electronics - * Chan Jeong <chan.jeong@lge.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2, - * or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * - * lzo_wrapper.c - */ - -#include <linux/mutex.h> -#include <linux/buffer_head.h> -#include <linux/slab.h> -#include <linux/vmalloc.h> -#include <linux/lzo.h> - -#include "squashfs_fs.h" -#include "squashfs_fs_sb.h" -#include "squashfs.h" -#include "decompressor.h" - -struct squashfs_lzo { - void *input; - void *output; -}; - -static void *lzo_init(struct squashfs_sb_info *msblk, void *buff, int len) -{ - int block_size = max_t(int, msblk->block_size, SQUASHFS_METADATA_SIZE); - - struct squashfs_lzo *stream = kzalloc(sizeof(*stream), GFP_KERNEL); - if (stream == NULL) - goto failed; - stream->input = vmalloc(block_size); - if (stream->input == NULL) - goto failed; - stream->output = vmalloc(block_size); - if (stream->output == NULL) - goto failed2; - - return stream; - -failed2: - vfree(stream->input); -failed: - ERROR("Failed to allocate lzo workspace\n"); - kfree(stream); - return ERR_PTR(-ENOMEM); -} - - -static void lzo_free(void *strm) -{ - struct squashfs_lzo *stream = strm; - - if (stream) { - vfree(stream->input); - vfree(stream->output); - } - kfree(stream); -} - - -static int lzo_uncompress(struct squashfs_sb_info *msblk, void **buffer, - struct buffer_head **bh, int b, int offset, int length, int srclength, - int pages) -{ - struct squashfs_lzo *stream = msblk->stream; - void *buff = stream->input; - int avail, i, bytes = length, res; - size_t out_len = srclength; - - mutex_lock(&msblk->read_data_mutex); - - for (i = 0; i < b; i++) { - wait_on_buffer(bh[i]); - if (!buffer_uptodate(bh[i])) - goto block_release; - - avail = min(bytes, msblk->devblksize - offset); - memcpy(buff, bh[i]->b_data + offset, avail); - buff += avail; - bytes -= avail; - offset = 0; - put_bh(bh[i]); - } - - res = lzo1x_decompress_safe(stream->input, (size_t)length, - stream->output, &out_len); - if (res != LZO_E_OK) - goto failed; - - res = bytes = (int)out_len; - for (i = 0, buff = stream->output; bytes && i < pages; i++) { - avail = min_t(int, bytes, PAGE_CACHE_SIZE); - memcpy(buffer[i], buff, avail); - buff += avail; - bytes -= avail; - } - - mutex_unlock(&msblk->read_data_mutex); - return res; - -block_release: - for (; i < b; i++) - put_bh(bh[i]); - -failed: - mutex_unlock(&msblk->read_data_mutex); - - ERROR("lzo decompression failed, data probably corrupt\n"); - return -EIO; -} - -const struct squashfs_decompressor squashfs_lzo_comp_ops = { - .init = lzo_init, - .free = lzo_free, - .decompress = lzo_uncompress, - .id = LZO_COMPRESSION, - .name = "lzo", - .supported = 1 -}; |