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-rw-r--r--fs/logfs/compr.c95
1 files changed, 0 insertions, 95 deletions
diff --git a/fs/logfs/compr.c b/fs/logfs/compr.c
deleted file mode 100644
index 961f02b86d97..000000000000
--- a/fs/logfs/compr.c
+++ /dev/null
@@ -1,95 +0,0 @@
-/*
- * fs/logfs/compr.c - compression routines
- *
- * As should be obvious for Linux kernel code, license is GPLv2
- *
- * Copyright (c) 2005-2008 Joern Engel <joern@logfs.org>
- */
-#include "logfs.h"
-#include <linux/vmalloc.h>
-#include <linux/zlib.h>
-
-#define COMPR_LEVEL 3
-
-static DEFINE_MUTEX(compr_mutex);
-static struct z_stream_s stream;
-
-int logfs_compress(void *in, void *out, size_t inlen, size_t outlen)
-{
- int err, ret;
-
- ret = -EIO;
- mutex_lock(&compr_mutex);
- err = zlib_deflateInit(&stream, COMPR_LEVEL);
- if (err != Z_OK)
- goto error;
-
- stream.next_in = in;
- stream.avail_in = inlen;
- stream.total_in = 0;
- stream.next_out = out;
- stream.avail_out = outlen;
- stream.total_out = 0;
-
- err = zlib_deflate(&stream, Z_FINISH);
- if (err != Z_STREAM_END)
- goto error;
-
- err = zlib_deflateEnd(&stream);
- if (err != Z_OK)
- goto error;
-
- if (stream.total_out >= stream.total_in)
- goto error;
-
- ret = stream.total_out;
-error:
- mutex_unlock(&compr_mutex);
- return ret;
-}
-
-int logfs_uncompress(void *in, void *out, size_t inlen, size_t outlen)
-{
- int err, ret;
-
- ret = -EIO;
- mutex_lock(&compr_mutex);
- err = zlib_inflateInit(&stream);
- if (err != Z_OK)
- goto error;
-
- stream.next_in = in;
- stream.avail_in = inlen;
- stream.total_in = 0;
- stream.next_out = out;
- stream.avail_out = outlen;
- stream.total_out = 0;
-
- err = zlib_inflate(&stream, Z_FINISH);
- if (err != Z_STREAM_END)
- goto error;
-
- err = zlib_inflateEnd(&stream);
- if (err != Z_OK)
- goto error;
-
- ret = 0;
-error:
- mutex_unlock(&compr_mutex);
- return ret;
-}
-
-int __init logfs_compr_init(void)
-{
- size_t size = max(zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL),
- zlib_inflate_workspacesize());
- stream.workspace = vmalloc(size);
- if (!stream.workspace)
- return -ENOMEM;
- return 0;
-}
-
-void logfs_compr_exit(void)
-{
- vfree(stream.workspace);
-}