1 files changed, 38 insertions, 0 deletions

diff --git a/fs/squashfs/file_cache.c b/fs/squashfs/file_cache.c
new file mode 100644
index 000000000000..f2310d2a2019
--- /dev/null
+++ b/fs/squashfs/file_cache.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2013
+ * Phillip Lougher <phillip@squashfs.org.uk>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ */
+
+#include <linux/fs.h>
+#include <linux/vfs.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/pagemap.h>
+#include <linux/mutex.h>
+
+#include "squashfs_fs.h"
+#include "squashfs_fs_sb.h"
+#include "squashfs_fs_i.h"
+#include "squashfs.h"
+
+/* Read separately compressed datablock and memcopy into page cache */
+int squashfs_readpage_block(struct page *page, u64 block, int bsize)
+{
+        struct inode *i = page->mapping->host;
+        struct squashfs_cache_entry *buffer = squashfs_get_datablock(i->i_sb,
+                block, bsize);
+        int res = buffer->error;
+
+        if (res)
+                ERROR("Unable to read page, block %llx, size %x\n", block,
+                        bsize);
+        else
+                squashfs_copy_cache(page, buffer, buffer->length, 0);
+
+        squashfs_cache_put(buffer);
+        return res;
+}