Squashfs: add decompressor entries for lzma and lzo

Add knowledge of lzma/lzo compression formats to the decompressor framework. For now these are added as unsupported. Without these entries lzma/lzo compressed filesystems will be flagged as having unknown compression which is undesirable. Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
git-mirror · Jan 20, 2010 · dc32567 · dc32567
1 parent 4c0f0bb
commit dc32567
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Showing 2 changed files with 13 additions and 1 deletion.
diff --git a/fs/squashfs/decompressor.c b/fs/squashfs/decompressor.c
@@ -36,12 +36,22 @@
  * Squashfs, allowing multiple decompressors to be easily supported
  */
 
+static const struct squashfs_decompressor squashfs_lzma_unsupported_comp_ops = {
+	NULL, NULL, NULL, LZMA_COMPRESSION, "lzma", 0
+};
+
+static const struct squashfs_decompressor squashfs_lzo_unsupported_comp_ops = {
+	NULL, NULL, NULL, LZO_COMPRESSION, "lzo", 0
+};
+
 static const struct squashfs_decompressor squashfs_unknown_comp_ops = {
 	NULL, NULL, NULL, 0, "unknown", 0
 };
 
 static const struct squashfs_decompressor *decompressor[] = {
 	&squashfs_zlib_comp_ops,
+	&squashfs_lzma_unsupported_comp_ops,
+	&squashfs_lzo_unsupported_comp_ops,
 	&squashfs_unknown_comp_ops
 };
 

diff --git a/fs/squashfs/squashfs_fs.h b/fs/squashfs/squashfs_fs.h
@@ -211,7 +211,9 @@ struct meta_index {
 /*
  * definitions for structures on disk
  */
-#define ZLIB_COMPRESSION	 1
+#define ZLIB_COMPRESSION	1
+#define LZMA_COMPRESSION	2
+#define LZO_COMPRESSION		3
 
 struct squashfs_super_block {
 	__le32			s_magic;