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--- a/fs/ubifs/Kconfig
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+++ b/fs/ubifs/Kconfig
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@@ -5,8 +5,10 @@ config UBIFS_FS
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select CRYPTO if UBIFS_FS_ADVANCED_COMPR
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select CRYPTO if UBIFS_FS_LZO
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select CRYPTO if UBIFS_FS_ZLIB
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+ select CRYPTO if UBIFS_FS_XZ
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select CRYPTO_LZO if UBIFS_FS_LZO
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select CRYPTO_DEFLATE if UBIFS_FS_ZLIB
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+ select CRYPTO_XZ if UBIFS_FS_XZ
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depends on MTD_UBI
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help
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UBIFS is a file system for flash devices which works on top of UBI.
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@@ -35,3 +37,12 @@ config UBIFS_FS_ZLIB
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default y
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help
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Zlib compresses better than LZO but it is slower. Say 'Y' if unsure.
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+
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+config UBIFS_FS_XZ
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+ bool "XZ decompression support" if UBIFS_FS_ADVANCED_COMPR
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+ depends on UBIFS_FS
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+ default y
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+ help
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+ XZ compresses better the ZLIB but it is slower..
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+ Say 'Y' if unsure.
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+
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--- a/fs/ubifs/compress.c
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+++ b/fs/ubifs/compress.c
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@@ -71,6 +71,24 @@ static struct ubifs_compressor zlib_comp
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};
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#endif
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+#ifdef CONFIG_UBIFS_FS_XZ
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+static DEFINE_MUTEX(xz_enc_mutex);
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+static DEFINE_MUTEX(xz_dec_mutex);
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+
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+static struct ubifs_compressor xz_compr = {
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+ .compr_type = UBIFS_COMPR_XZ,
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+ .comp_mutex = &xz_enc_mutex,
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+ .decomp_mutex = &xz_dec_mutex,
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+ .name = "xz",
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+ .capi_name = "xz",
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+};
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+#else
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+static struct ubifs_compressor xz_compr = {
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+ .compr_type = UBIFS_COMPR_XZ,
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+ .name = "xz",
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+};
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+#endif
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+
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/* All UBIFS compressors */
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struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT];
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@@ -232,9 +250,15 @@ int __init ubifs_compressors_init(void)
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if (err)
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goto out_lzo;
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+ err = compr_init(&xz_compr);
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+ if (err)
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+ goto out_zlib;
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+
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ubifs_compressors[UBIFS_COMPR_NONE] = &none_compr;
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return 0;
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+out_zlib:
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+ compr_exit(&zlib_compr);
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out_lzo:
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compr_exit(&lzo_compr);
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return err;
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@@ -247,4 +271,5 @@ void ubifs_compressors_exit(void)
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{
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compr_exit(&lzo_compr);
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compr_exit(&zlib_compr);
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+ compr_exit(&xz_compr);
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}
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--- a/fs/ubifs/ubifs-media.h
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+++ b/fs/ubifs/ubifs-media.h
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@@ -332,12 +332,14 @@ enum {
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* UBIFS_COMPR_NONE: no compression
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* UBIFS_COMPR_LZO: LZO compression
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* UBIFS_COMPR_ZLIB: ZLIB compression
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+ * UBIFS_COMPR_XZ: XZ compression
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* UBIFS_COMPR_TYPES_CNT: count of supported compression types
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*/
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enum {
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UBIFS_COMPR_NONE,
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UBIFS_COMPR_LZO,
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UBIFS_COMPR_ZLIB,
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+ UBIFS_COMPR_XZ,
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UBIFS_COMPR_TYPES_CNT,
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};
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