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Diffstat (limited to 'ANDROID_3.4.5/fs/squashfs/lzo_wrapper.c')
-rw-r--r--ANDROID_3.4.5/fs/squashfs/lzo_wrapper.c135
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
-};