Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 399 deletions

diff --git a/ANDROID_3.4.5/fs/btrfs/zlib.c b/ANDROID_3.4.5/fs/btrfs/zlib.c
deleted file mode 100644
index 92c20654..00000000
--- a/ANDROID_3.4.5/fs/btrfs/zlib.c
+++ /dev/null
@@ -1,399 +0,0 @@
-/*
- * Copyright (C) 2008 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License v2 as published by the Free Software Foundation.
- *
- * 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, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
- * Based on jffs2 zlib code:
- * Copyright © 2001-2007 Red Hat, Inc.
- * Created by David Woodhouse <dwmw2@infradead.org>
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/zlib.h>
-#include <linux/zutil.h>
-#include <linux/vmalloc.h>
-#include <linux/init.h>
-#include <linux/err.h>
-#include <linux/sched.h>
-#include <linux/pagemap.h>
-#include <linux/bio.h>
-#include "compression.h"
-
-struct workspace {
-	z_stream inf_strm;
-	z_stream def_strm;
-	char *buf;
-	struct list_head list;
-};
-
-static void zlib_free_workspace(struct list_head *ws)
-{
-	struct workspace *workspace = list_entry(ws, struct workspace, list);
-
-	vfree(workspace->def_strm.workspace);
-	vfree(workspace->inf_strm.workspace);
-	kfree(workspace->buf);
-	kfree(workspace);
-}
-
-static struct list_head *zlib_alloc_workspace(void)
-{
-	struct workspace *workspace;
-
-	workspace = kzalloc(sizeof(*workspace), GFP_NOFS);
-	if (!workspace)
-		return ERR_PTR(-ENOMEM);
-
-	workspace->def_strm.workspace = vmalloc(zlib_deflate_workspacesize(
-						MAX_WBITS, MAX_MEM_LEVEL));
-	workspace->inf_strm.workspace = vmalloc(zlib_inflate_workspacesize());
-	workspace->buf = kmalloc(PAGE_CACHE_SIZE, GFP_NOFS);
-	if (!workspace->def_strm.workspace ||
-	    !workspace->inf_strm.workspace || !workspace->buf)
-		goto fail;
-
-	INIT_LIST_HEAD(&workspace->list);
-
-	return &workspace->list;
-fail:
-	zlib_free_workspace(&workspace->list);
-	return ERR_PTR(-ENOMEM);
-}
-
-static int zlib_compress_pages(struct list_head *ws,
-			       struct address_space *mapping,
-			       u64 start, unsigned long len,
-			       struct page **pages,
-			       unsigned long nr_dest_pages,
-			       unsigned long *out_pages,
-			       unsigned long *total_in,
-			       unsigned long *total_out,
-			       unsigned long max_out)
-{
-	struct workspace *workspace = list_entry(ws, struct workspace, list);
-	int ret;
-	char *data_in;
-	char *cpage_out;
-	int nr_pages = 0;
-	struct page *in_page = NULL;
-	struct page *out_page = NULL;
-	unsigned long bytes_left;
-
-	*out_pages = 0;
-	*total_out = 0;
-	*total_in = 0;
-
-	if (Z_OK != zlib_deflateInit(&workspace->def_strm, 3)) {
-		printk(KERN_WARNING "deflateInit failed\n");
-		ret = -1;
-		goto out;
-	}
-
-	workspace->def_strm.total_in = 0;
-	workspace->def_strm.total_out = 0;
-
-	in_page = find_get_page(mapping, start >> PAGE_CACHE_SHIFT);
-	data_in = kmap(in_page);
-
-	out_page = alloc_page(GFP_NOFS | __GFP_HIGHMEM);
-	if (out_page == NULL) {
-		ret = -1;
-		goto out;
-	}
-	cpage_out = kmap(out_page);
-	pages[0] = out_page;
-	nr_pages = 1;
-
-	workspace->def_strm.next_in = data_in;
-	workspace->def_strm.next_out = cpage_out;
-	workspace->def_strm.avail_out = PAGE_CACHE_SIZE;
-	workspace->def_strm.avail_in = min(len, PAGE_CACHE_SIZE);
-
-	while (workspace->def_strm.total_in < len) {
-		ret = zlib_deflate(&workspace->def_strm, Z_SYNC_FLUSH);
-		if (ret != Z_OK) {
-			printk(KERN_DEBUG "btrfs deflate in loop returned %d\n",
-			       ret);
-			zlib_deflateEnd(&workspace->def_strm);
-			ret = -1;
-			goto out;
-		}
-
-		/* we're making it bigger, give up */
-		if (workspace->def_strm.total_in > 8192 &&
-		    workspace->def_strm.total_in <
-		    workspace->def_strm.total_out) {
-			ret = -1;
-			goto out;
-		}
-		/* we need another page for writing out.  Test this
-		 * before the total_in so we will pull in a new page for
-		 * the stream end if required
-		 */
-		if (workspace->def_strm.avail_out == 0) {
-			kunmap(out_page);
-			if (nr_pages == nr_dest_pages) {
-				out_page = NULL;
-				ret = -1;
-				goto out;
-			}
-			out_page = alloc_page(GFP_NOFS | __GFP_HIGHMEM);
-			if (out_page == NULL) {
-				ret = -1;
-				goto out;
-			}
-			cpage_out = kmap(out_page);
-			pages[nr_pages] = out_page;
-			nr_pages++;
-			workspace->def_strm.avail_out = PAGE_CACHE_SIZE;
-			workspace->def_strm.next_out = cpage_out;
-		}
-		/* we're all done */
-		if (workspace->def_strm.total_in >= len)
-			break;
-
-		/* we've read in a full page, get a new one */
-		if (workspace->def_strm.avail_in == 0) {
-			if (workspace->def_strm.total_out > max_out)
-				break;
-
-			bytes_left = len - workspace->def_strm.total_in;
-			kunmap(in_page);
-			page_cache_release(in_page);
-
-			start += PAGE_CACHE_SIZE;
-			in_page = find_get_page(mapping,
-						start >> PAGE_CACHE_SHIFT);
-			data_in = kmap(in_page);
-			workspace->def_strm.avail_in = min(bytes_left,
-							   PAGE_CACHE_SIZE);
-			workspace->def_strm.next_in = data_in;
-		}
-	}
-	workspace->def_strm.avail_in = 0;
-	ret = zlib_deflate(&workspace->def_strm, Z_FINISH);
-	zlib_deflateEnd(&workspace->def_strm);
-
-	if (ret != Z_STREAM_END) {
-		ret = -1;
-		goto out;
-	}
-
-	if (workspace->def_strm.total_out >= workspace->def_strm.total_in) {
-		ret = -1;
-		goto out;
-	}
-
-	ret = 0;
-	*total_out = workspace->def_strm.total_out;
-	*total_in = workspace->def_strm.total_in;
-out:
-	*out_pages = nr_pages;
-	if (out_page)
-		kunmap(out_page);
-
-	if (in_page) {
-		kunmap(in_page);
-		page_cache_release(in_page);
-	}
-	return ret;
-}
-
-static int zlib_decompress_biovec(struct list_head *ws, struct page **pages_in,
-				  u64 disk_start,
-				  struct bio_vec *bvec,
-				  int vcnt,
-				  size_t srclen)
-{
-	struct workspace *workspace = list_entry(ws, struct workspace, list);
-	int ret = 0, ret2;
-	int wbits = MAX_WBITS;
-	char *data_in;
-	size_t total_out = 0;
-	unsigned long page_in_index = 0;
-	unsigned long page_out_index = 0;
-	unsigned long total_pages_in = (srclen + PAGE_CACHE_SIZE - 1) /
-					PAGE_CACHE_SIZE;
-	unsigned long buf_start;
-	unsigned long pg_offset;
-
-	data_in = kmap(pages_in[page_in_index]);
-	workspace->inf_strm.next_in = data_in;
-	workspace->inf_strm.avail_in = min_t(size_t, srclen, PAGE_CACHE_SIZE);
-	workspace->inf_strm.total_in = 0;
-
-	workspace->inf_strm.total_out = 0;
-	workspace->inf_strm.next_out = workspace->buf;
-	workspace->inf_strm.avail_out = PAGE_CACHE_SIZE;
-	pg_offset = 0;
-
-	/* If it's deflate, and it's got no preset dictionary, then
-	   we can tell zlib to skip the adler32 check. */
-	if (srclen > 2 && !(data_in[1] & PRESET_DICT) &&
-	    ((data_in[0] & 0x0f) == Z_DEFLATED) &&
-	    !(((data_in[0]<<8) + data_in[1]) % 31)) {
-
-		wbits = -((data_in[0] >> 4) + 8);
-		workspace->inf_strm.next_in += 2;
-		workspace->inf_strm.avail_in -= 2;
-	}
-
-	if (Z_OK != zlib_inflateInit2(&workspace->inf_strm, wbits)) {
-		printk(KERN_WARNING "inflateInit failed\n");
-		return -1;
-	}
-	while (workspace->inf_strm.total_in < srclen) {
-		ret = zlib_inflate(&workspace->inf_strm, Z_NO_FLUSH);
-		if (ret != Z_OK && ret != Z_STREAM_END)
-			break;
-
-		buf_start = total_out;
-		total_out = workspace->inf_strm.total_out;
-
-		/* we didn't make progress in this inflate call, we're done */
-		if (buf_start == total_out)
-			break;
-
-		ret2 = btrfs_decompress_buf2page(workspace->buf, buf_start,
-						 total_out, disk_start,
-						 bvec, vcnt,
-						 &page_out_index, &pg_offset);
-		if (ret2 == 0) {
-			ret = 0;
-			goto done;
-		}
-
-		workspace->inf_strm.next_out = workspace->buf;
-		workspace->inf_strm.avail_out = PAGE_CACHE_SIZE;
-
-		if (workspace->inf_strm.avail_in == 0) {
-			unsigned long tmp;
-			kunmap(pages_in[page_in_index]);
-			page_in_index++;
-			if (page_in_index >= total_pages_in) {
-				data_in = NULL;
-				break;
-			}
-			data_in = kmap(pages_in[page_in_index]);
-			workspace->inf_strm.next_in = data_in;
-			tmp = srclen - workspace->inf_strm.total_in;
-			workspace->inf_strm.avail_in = min(tmp,
-							   PAGE_CACHE_SIZE);
-		}
-	}
-	if (ret != Z_STREAM_END)
-		ret = -1;
-	else
-		ret = 0;
-done:
-	zlib_inflateEnd(&workspace->inf_strm);
-	if (data_in)
-		kunmap(pages_in[page_in_index]);
-	return ret;
-}
-
-static int zlib_decompress(struct list_head *ws, unsigned char *data_in,
-			   struct page *dest_page,
-			   unsigned long start_byte,
-			   size_t srclen, size_t destlen)
-{
-	struct workspace *workspace = list_entry(ws, struct workspace, list);
-	int ret = 0;
-	int wbits = MAX_WBITS;
-	unsigned long bytes_left = destlen;
-	unsigned long total_out = 0;
-	char *kaddr;
-
-	workspace->inf_strm.next_in = data_in;
-	workspace->inf_strm.avail_in = srclen;
-	workspace->inf_strm.total_in = 0;
-
-	workspace->inf_strm.next_out = workspace->buf;
-	workspace->inf_strm.avail_out = PAGE_CACHE_SIZE;
-	workspace->inf_strm.total_out = 0;
-	/* If it's deflate, and it's got no preset dictionary, then
-	   we can tell zlib to skip the adler32 check. */
-	if (srclen > 2 && !(data_in[1] & PRESET_DICT) &&
-	    ((data_in[0] & 0x0f) == Z_DEFLATED) &&
-	    !(((data_in[0]<<8) + data_in[1]) % 31)) {
-
-		wbits = -((data_in[0] >> 4) + 8);
-		workspace->inf_strm.next_in += 2;
-		workspace->inf_strm.avail_in -= 2;
-	}
-
-	if (Z_OK != zlib_inflateInit2(&workspace->inf_strm, wbits)) {
-		printk(KERN_WARNING "inflateInit failed\n");
-		return -1;
-	}
-
-	while (bytes_left > 0) {
-		unsigned long buf_start;
-		unsigned long buf_offset;
-		unsigned long bytes;
-		unsigned long pg_offset = 0;
-
-		ret = zlib_inflate(&workspace->inf_strm, Z_NO_FLUSH);
-		if (ret != Z_OK && ret != Z_STREAM_END)
-			break;
-
-		buf_start = total_out;
-		total_out = workspace->inf_strm.total_out;
-
-		if (total_out == buf_start) {
-			ret = -1;
-			break;
-		}
-
-		if (total_out <= start_byte)
-			goto next;
-
-		if (total_out > start_byte && buf_start < start_byte)
-			buf_offset = start_byte - buf_start;
-		else
-			buf_offset = 0;
-
-		bytes = min(PAGE_CACHE_SIZE - pg_offset,
-			    PAGE_CACHE_SIZE - buf_offset);
-		bytes = min(bytes, bytes_left);
-
-		kaddr = kmap_atomic(dest_page);
-		memcpy(kaddr + pg_offset, workspace->buf + buf_offset, bytes);
-		kunmap_atomic(kaddr);
-
-		pg_offset += bytes;
-		bytes_left -= bytes;
-next:
-		workspace->inf_strm.next_out = workspace->buf;
-		workspace->inf_strm.avail_out = PAGE_CACHE_SIZE;
-	}
-
-	if (ret != Z_STREAM_END && bytes_left != 0)
-		ret = -1;
-	else
-		ret = 0;
-
-	zlib_inflateEnd(&workspace->inf_strm);
-	return ret;
-}
-
-struct btrfs_compress_op btrfs_zlib_compress = {
-	.alloc_workspace	= zlib_alloc_workspace,
-	.free_workspace		= zlib_free_workspace,
-	.compress_pages		= zlib_compress_pages,
-	.decompress_biovec	= zlib_decompress_biovec,
-	.decompress		= zlib_decompress,
-};