4 files changed, 23 insertions, 58 deletions
diff --git a/fs/squashfs/sqfs_decompressor.c b/fs/squashfs/sqfs_decompressor.c
index 6b3e01cdad7..cfd1153fd74 100644
--- a/fs/squashfs/sqfs_decompressor.c
+++ b/fs/squashfs/sqfs_decompressor.c
@@ -18,6 +18,10 @@
 #include <u-boot/zlib.h>
 #endif
 
+#if IS_ENABLED(CONFIG_LZ4)
+#include <u-boot/lz4.h>
+#endif
+
 #if IS_ENABLED(CONFIG_ZSTD)
 #include <linux/zstd.h>
 #endif
@@ -38,6 +42,10 @@ int sqfs_decompressor_init(struct squashfs_ctxt *ctxt)
 	case SQFS_COMP_ZLIB:
 		break;
 #endif
+#if IS_ENABLED(CONFIG_LZ4)
+	case SQFS_COMP_LZ4:
+		break;
+#endif
 #if IS_ENABLED(CONFIG_ZSTD)
 	case SQFS_COMP_ZSTD:
 		ctxt->zstd_workspace = malloc(zstd_dctx_workspace_bound());
@@ -66,6 +74,10 @@ void sqfs_decompressor_cleanup(struct squashfs_ctxt *ctxt)
 	case SQFS_COMP_ZLIB:
 		break;
 #endif
+#if IS_ENABLED(CONFIG_LZ4)
+	case SQFS_COMP_LZ4:
+		break;
+#endif
 #if IS_ENABLED(CONFIG_ZSTD)
 	case SQFS_COMP_ZSTD:
 		free(ctxt->zstd_workspace);
@@ -139,6 +151,17 @@ int sqfs_decompress(struct squashfs_ctxt *ctxt, void *dest,
 
 		break;
 #endif
+#if IS_ENABLED(CONFIG_LZ4)
+	case SQFS_COMP_LZ4:
+		ret = LZ4_decompress_safe(source, dest, src_len, *dest_len);
+		if (ret < 0) {
+			printf("LZ4 decompression failed.\n");
+			return -EINVAL;
+		}
+
+		ret = 0;
+		break;
+#endif
 #if IS_ENABLED(CONFIG_ZSTD)
 	case SQFS_COMP_ZSTD:
 		ret = sqfs_zstd_decompress(ctxt, dest, *dest_len, source, src_len);
diff --git a/fs/squashfs/sqfs_decompressor.h b/fs/squashfs/sqfs_decompressor.h
index 892cfb69744..c48b74fdf50 100644
--- a/fs/squashfs/sqfs_decompressor.h
+++ b/fs/squashfs/sqfs_decompressor.h
@@ -18,41 +18,6 @@
 #define SQFS_COMP_LZ4 5
 #define SQFS_COMP_ZSTD 6
 
-/* LZMA does not support any compression options */
-
-struct squashfs_gzip_opts {
-	u32 compression_level;
-	u16 window_size;
-	u16 strategies;
-};
-
-struct squashfs_xz_opts {
-	u32 dictionary_size;
-	u32 executable_filters;
-};
-
-struct squashfs_lz4_opts {
-	u32 version;
-	u32 flags;
-};
-
-struct squashfs_zstd_opts {
-	u32 compression_level;
-};
-
-struct squashfs_lzo_opts {
-	u32 algorithm;
-	u32 level;
-};
-
-union squashfs_compression_opts {
-	struct squashfs_gzip_opts *gzip;
-	struct squashfs_xz_opts *xz;
-	struct squashfs_lz4_opts *lz4;
-	struct squashfs_zstd_opts *zstd;
-	struct squashfs_lzo_opts *lzo;
-};
-
 int sqfs_decompress(struct squashfs_ctxt *ctxt, void *dest,
 		    unsigned long *dest_len, void *source, u32 src_len);
 int sqfs_decompressor_init(struct squashfs_ctxt *ctxt);
diff --git a/fs/squashfs/sqfs_filesystem.h b/fs/squashfs/sqfs_filesystem.h
index 5440b6c0e05..be56498a5e3 100644
--- a/fs/squashfs/sqfs_filesystem.h
+++ b/fs/squashfs/sqfs_filesystem.h
@@ -13,7 +13,6 @@
 #include <part.h>
 #include <stdint.h>
 
-#define SQFS_UNCOMPRESSED_DATA 0x0002
 #define SQFS_MAGIC_NUMBER 0x73717368
 /* The three first members of squashfs_dir_index make a total of 12 bytes */
 #define SQFS_DIR_INDEX_BASE_LENGTH 12
@@ -23,7 +22,6 @@
 #define SQFS_MAX_ENTRIES 512
 /* Metadata blocks start by a 2-byte length header */
 #define SQFS_HEADER_SIZE 2
-#define SQFS_LREG_INODE_MIN_SIZE 56
 #define SQFS_DIR_HEADER_SIZE 12
 #define SQFS_MISC_ENTRY_TYPE -1
 #define SQFS_EMPTY_FILE_SIZE 3
diff --git a/fs/squashfs/sqfs_utils.h b/fs/squashfs/sqfs_utils.h
index 1260abe22be..41f13e8a9ec 100644
--- a/fs/squashfs/sqfs_utils.h
+++ b/fs/squashfs/sqfs_utils.h
@@ -15,11 +15,8 @@
 #define SQFS_FRAGMENT_INDEX_OFFSET(A) ((A) % SQFS_MAX_ENTRIES)
 #define SQFS_FRAGMENT_INDEX(A) ((A) / SQFS_MAX_ENTRIES)
 #define SQFS_BLOCK_SIZE(A) ((A) & GENMASK(23, 0))
-#define SQFS_CHECK_FLAG(flag, bit) (((flag) >> (bit)) & 1)
 /* Useful for both fragment and data blocks */
 #define SQFS_COMPRESSED_BLOCK(A) (!((A) & BIT(24)))
-/* SQFS_COMPRESSED_DATA strictly used with super block's 'flags' member */
-#define SQFS_COMPRESSED_DATA(A) (!((A) & 0x0002))
 #define SQFS_IS_FRAGMENTED(A) ((A) != 0xFFFFFFFF)
 /*
  * These two macros work as getters for a metada block header, retrieving the
@@ -28,22 +25,4 @@
 #define SQFS_COMPRESSED_METADATA(A) (!((A) & BIT(15)))
 #define SQFS_METADATA_SIZE(A) ((A) & GENMASK(14, 0))
 
-struct squashfs_super_block_flags {
-	/* check: unused
-	 * uncompressed_ids: not supported
-	 */
-	bool uncompressed_inodes;
-	bool uncompressed_data;
-	bool check;
-	bool uncompressed_frags;
-	bool no_frags;
-	bool always_frags;
-	bool duplicates;
-	bool exportable;
-	bool uncompressed_xattrs;
-	bool no_xattrs;
-	bool compressor_options;
-	bool uncompressed_ids;
-};
-
 #endif /* SQFS_UTILS_H  */