kernel: remove ubifs xz decompression support

It has been unused, and less useful than squashfs for cases where flash
space usage matters.

Signed-off-by: Felix Fietkau <nbd@nbd.name>

2 files changed, 4 insertions, 382 deletions

diff --git a/tools/mtd-utils/patches/136-mkfs.ubifs-xz-support.patch b/tools/mtd-utils/patches/136-mkfs.ubifs-xz-support.patch
deleted file mode 100644
index e8b491b3ce..0000000000
--- a/tools/mtd-utils/patches/136-mkfs.ubifs-xz-support.patch
+++ /dev/null
@@ -1,378 +0,0 @@
---- a/Makefile
-+++ b/Makefile
-@@ -4,7 +4,7 @@
- VERSION = 1.5.2
- 
- CPPFLAGS += -D_GNU_SOURCE -I./include -I$(BUILDDIR)/include -I./ubi-utils/include $(ZLIBCPPFLAGS) $(LZOCPPFLAGS) $(UUIDCPPFLAGS)
--CPPFLAGS += -I./include/linux/lzma
-+CPPFLAGS += $(XZCPPFLAGS) -I./include/linux/lzma
- 
- ifeq ($(WITHOUT_XATTR), 1)
-   CPPFLAGS += -DWITHOUT_XATTR
-@@ -113,8 +113,13 @@ ifeq ($(WITHOUT_LZO), 1)
- else
-   LZOLDLIBS = -llzo2
- endif
-+ifeq ($(WITHOUT_XZ), 1)
-+  CPPFLAGS += -DWITHOUT_XZ
-+else
-+  XZLDLIBS = -llzma
-+endif
- 
--LDLIBS_mkfs.ubifs = -lz $(LZOLDLIBS) -lm -luuid
-+LDLIBS_mkfs.ubifs = -lz $(LZOLDLIBS) $(XZLDLIBS) -lm -luuid
- $(call mkdep,mkfs.ubifs/,mkfs.ubifs,,ubi-utils/libubi.a)
- 
- #
---- a/mkfs.ubifs/compr.c
-+++ b/mkfs.ubifs/compr.c
-@@ -126,6 +126,114 @@ static inline int lzo_init(void) { retur
- static inline void lzo_fini(void) { }
- #endif
- 
-+#ifndef WITHOUT_XZ
-+
-+#include <lzma.h>
-+
-+struct xz_ctx {
-+	lzma_filter	filters[3];
-+	lzma_options_lzma opts;
-+};
-+
-+static struct xz_ctx *xz_ctx;
-+
-+#define LZMA_COMPRESSION_LEVEL	9
-+
-+static struct xz_ctx *xz_ctx_init(void)
-+{
-+	struct xz_ctx *ctx;
-+	lzma_options_lzma *opts_lzma;
-+	uint32_t preset;
-+	int ret;
-+
-+	ctx = malloc(sizeof(struct xz_ctx));
-+	if (ctx == NULL)
-+		goto err;
-+
-+	memset(ctx, 0, sizeof(struct xz_ctx));
-+
-+	opts_lzma = &ctx->opts;
-+
-+	preset = LZMA_COMPRESSION_LEVEL | LZMA_PRESET_EXTREME;
-+	ret = lzma_lzma_preset(opts_lzma, preset);
-+	if (ret)
-+		goto err_free_ctx;
-+
-+	/* TODO: allow to specify LZMA options via command line */
-+#if 0
-+	opts_lzma->lc = 3;
-+	opts_lzma->lp = 0;
-+	opts_lzma->pb = 2;
-+	opts_lzma->nice_len = 64;
-+#else
-+	opts_lzma->lc = 0;
-+	opts_lzma->lp = 2;
-+	opts_lzma->pb = 2;
-+	opts_lzma->nice_len = 64;
-+#endif
-+
-+	ctx->filters[0].id = LZMA_FILTER_LZMA2;
-+	ctx->filters[0].options = opts_lzma;
-+	ctx->filters[1].id = LZMA_VLI_UNKNOWN;
-+
-+	return ctx;
-+
-+err_free_ctx:
-+	free(ctx);
-+err:
-+	return NULL;
-+}
-+
-+static void xz_ctx_free(struct xz_ctx *ctx)
-+{
-+	free(ctx);
-+}
-+
-+static int xz_init(void)
-+{
-+	xz_ctx = xz_ctx_init();
-+	if (xz_ctx == NULL)
-+		return -1;
-+
-+	return 0;
-+}
-+
-+static void xz_fini(void)
-+{
-+	xz_ctx_free(xz_ctx);
-+}
-+
-+static int xz_compress(void *in_buf, size_t in_len, void *out_buf,
-+		       size_t *out_len)
-+{
-+	size_t ret_len;
-+	lzma_ret ret_xz;
-+	int ret;
-+
-+	ret = -1;
-+
-+	ret_len = 0;
-+	ret_xz = lzma_stream_buffer_encode(xz_ctx->filters, LZMA_CHECK_CRC32,
-+					   NULL, in_buf, in_len, out_buf,
-+					   &ret_len, *out_len);
-+	if (ret_xz != LZMA_OK) {
-+		fprintf(stderr, "XZ error: %d\n", (int) ret_xz);
-+		goto out;
-+	}
-+
-+	*out_len = ret_len;
-+
-+	ret = 0;
-+out:
-+	return ret;
-+}
-+#else
-+static inline int xz_init(void) { return 0; }
-+static inline void xz_fini(void) { }
-+static inline int xz_compress(void *in_buf, size_t in_len, void *out_buf,
-+			      size_t *out_len) { return -1; }
-+#endif
-+
- static int no_compress(void *in_buf, size_t in_len, void *out_buf,
- 		       size_t *out_len)
- {
-@@ -198,6 +306,9 @@ int compress_data(void *in_buf, size_t i
- 		case MKFS_UBIFS_COMPR_LZO:
- 			ret = lzo_compress(in_buf, in_len, out_buf, out_len);
- 			break;
-+		case MKFS_UBIFS_COMPR_XZ:
-+			ret = xz_compress(in_buf, in_len, out_buf, out_len);
-+			break;
- 		case MKFS_UBIFS_COMPR_ZLIB:
- 			ret = zlib_deflate(in_buf, in_len, out_buf, out_len);
- 			break;
-@@ -225,12 +336,18 @@ int init_compression(void)
- 	if (ret)
- 		goto err;
- 
-+	ret = xz_init();
-+	if (ret)
-+		goto err_lzo;
-+
- 	zlib_buf = malloc(UBIFS_BLOCK_SIZE * WORST_COMPR_FACTOR);
- 	if (!zlib_buf)
--		goto err_lzo;
-+		goto err_xz;
- 
- 	return 0;
- 
-+err_xz:
-+	xz_fini();
- err_lzo:
- 	lzo_fini();
- err:
-@@ -240,6 +357,7 @@ err:
- void destroy_compression(void)
- {
- 	free(zlib_buf);
-+	xz_fini();
- 	lzo_fini();
- 	if (errcnt)
- 		fprintf(stderr, "%llu compression errors occurred\n", errcnt);
---- a/mkfs.ubifs/compr.h
-+++ b/mkfs.ubifs/compr.h
-@@ -36,6 +36,7 @@ enum compression_type
- 	MKFS_UBIFS_COMPR_NONE,
- 	MKFS_UBIFS_COMPR_LZO,
- 	MKFS_UBIFS_COMPR_ZLIB,
-+	MKFS_UBIFS_COMPR_XZ,
- };
- 
- int compress_data(void *in_buf, size_t in_len, void *out_buf, size_t *out_len,
---- a/mkfs.ubifs/mkfs.ubifs.c
-+++ b/mkfs.ubifs/mkfs.ubifs.c
-@@ -99,6 +99,9 @@ struct ubifs_info info_;
- static struct ubifs_info *c = &info_;
- static libubi_t ubi;
- 
-+static int force_compr_set;
-+static int force_compr;
-+
- /* Debug levels are: 0 (none), 1 (statistics), 2 (files) ,3 (more details) */
- int debug_level;
- int verbose;
-@@ -133,7 +136,7 @@ static struct inum_mapping **hash_table;
- /* Inode creation sequence number */
- static unsigned long long creat_sqnum;
- 
--static const char *optstring = "d:r:m:o:D:yh?vVe:c:g:f:Fp:k:x:X:j:R:l:j:UQq";
-+static const char *optstring = "d:r:m:o:D:yh?vVe:c:g:f:Fp:k:x:X:z:j:R:l:j:UQq";
- 
- static const struct option longopts[] = {
- 	{"root",               1, NULL, 'r'},
-@@ -151,6 +154,7 @@ static const struct option longopts[] =
- 	{"reserved",           1, NULL, 'R'},
- 	{"compr",              1, NULL, 'x'},
- 	{"favor-percent",      1, NULL, 'X'},
-+	{"force-compr",        1, NULL, 'z'},
- 	{"fanout",             1, NULL, 'f'},
- 	{"space-fixup",        0, NULL, 'F'},
- 	{"keyhash",            1, NULL, 'k'},
-@@ -178,11 +182,13 @@ static const char *helptext =
- "-o, --output=FILE        output to FILE\n"
- "-j, --jrn-size=SIZE      journal size\n"
- "-R, --reserved=SIZE      how much space should be reserved for the super-user\n"
--"-x, --compr=TYPE         compression type - \"lzo\", \"favor_lzo\", \"zlib\" or\n"
--"                         \"none\" (default: \"lzo\")\n"
-+"-x, --compr=TYPE         default compression type - \"lzo\", \"favor_lzo\",\n"
-+"                         \"zlib\" or \"none\" (default: \"lzo\")\n"
- "-X, --favor-percent      may only be used with favor LZO compression and defines\n"
- "                         how many percent better zlib should compress to make\n"
- "                         mkfs.ubifs use zlib instead of LZO (default 20%)\n"
-+"-z, --force-compr=TYPE   force to build the fs with different compression -\n"
-+"                         \"lzo\", \"zlib\" or \"none\"\n"
- "-f, --fanout=NUM         fanout NUM (default: 8)\n"
- "-F, --space-fixup        file-system free space has to be fixed up on first mount\n"
- "                         (requires kernel version 3.0 or greater)\n"
-@@ -472,6 +478,43 @@ static int open_ubi(const char *node)
- 	return 0;
- }
- 
-+static const char *get_compr_str(int compr)
-+{
-+	switch (compr) {
-+	case UBIFS_COMPR_LZO:
-+		return "lzo";
-+	case UBIFS_COMPR_ZLIB:
-+		return "zlib";
-+	case UBIFS_COMPR_XZ:
-+		return "xz";
-+	case UBIFS_COMPR_NONE:
-+		return "none";
-+	}
-+
-+	return "unknown";
-+}
-+
-+static int get_compr_option(char *opt, int *compr_type, int *favor_lzo)
-+{
-+	*compr_type = UBIFS_COMPR_LZO;
-+
-+	if (favor_lzo)
-+		*favor_lzo = 0;
-+
-+	if (favor_lzo && strcmp(optarg, "favor_lzo") == 0)
-+		*favor_lzo = 1;
-+	else if (strcmp(optarg, "zlib") == 0)
-+		*compr_type = UBIFS_COMPR_ZLIB;
-+	else if (strcmp(optarg, "xz") == 0)
-+		*compr_type = UBIFS_COMPR_XZ;
-+	else if (strcmp(optarg, "none") == 0)
-+		*compr_type = UBIFS_COMPR_NONE;
-+	else if (strcmp(optarg, "lzo") != 0)
-+		return -1;
-+
-+	return 0;
-+}
-+
- static int get_options(int argc, char**argv)
- {
- 	int opt, i;
-@@ -594,14 +637,13 @@ static int get_options(int argc, char**a
- 				return err_msg("bad key hash");
- 			break;
- 		case 'x':
--			if (strcmp(optarg, "favor_lzo") == 0)
--				c->favor_lzo = 1;
--			else if (strcmp(optarg, "zlib") == 0)
--				c->default_compr = UBIFS_COMPR_ZLIB;
--			else if (strcmp(optarg, "none") == 0)
--				c->default_compr = UBIFS_COMPR_NONE;
--			else if (strcmp(optarg, "lzo") != 0)
--				return err_msg("bad compressor name");
-+			if (get_compr_option(optarg, &c->default_compr,
-+					     &c->favor_lzo))
-+				return err_msg("bad compressor name '%s'",
-+						optarg);
-+			if (c->default_compr == UBIFS_COMPR_XZ)
-+				return err_msg("'%s' can't be used as default compressor",
-+						optarg);
- 			break;
- 		case 'X':
- 			c->favor_percent = strtol(optarg, &endp, 0);
-@@ -610,6 +652,12 @@ static int get_options(int argc, char**a
- 				return err_msg("bad favor LZO percent '%s'",
- 					       optarg);
- 			break;
-+		case 'z':
-+			if (get_compr_option(optarg, &force_compr, NULL))
-+				return err_msg("bad forced compressor name '%s'",
-+						optarg);
-+			force_compr_set = 1;
-+			break;
- 		case 'j':
- 			c->max_bud_bytes = get_bytes(optarg);
- 			if (c->max_bud_bytes <= 0)
-@@ -684,6 +732,9 @@ static int get_options(int argc, char**a
- 		c->min_io_size = 8;
- 	c->rp_size = add_space_overhead(c->rp_size);
- 
-+	if (force_compr_set == 0)
-+		force_compr = c->default_compr;
-+
- 	if (verbose) {
- 		printf("mkfs.ubifs\n");
- 		printf("\troot:         %s\n", root);
-@@ -693,17 +744,10 @@ static int get_options(int argc, char**a
- 		printf("\toutput:       %s\n", output);
- 		printf("\tjrn_size:     %llu\n", c->max_bud_bytes);
- 		printf("\treserved:     %llu\n", c->rp_size);
--		switch (c->default_compr) {
--		case UBIFS_COMPR_LZO:
--			printf("\tcompr:        lzo\n");
--			break;
--		case UBIFS_COMPR_ZLIB:
--			printf("\tcompr:        zlib\n");
--			break;
--		case UBIFS_COMPR_NONE:
--			printf("\tcompr:        none\n");
--			break;
--		}
-+		printf("\tcompr:        %s\n", get_compr_str(c->default_compr));
-+		if (force_compr_set)
-+			printf("\tforced compr: %s\n",
-+			       get_compr_str(force_compr));
- 		printf("\tkeyhash:      %s\n", (c->key_hash == key_r5_hash) ?
- 						"r5" : "test");
- 		printf("\tfanout:       %d\n", c->fanout);
-@@ -1284,7 +1328,7 @@ static int add_file(const char *path_nam
- 			use_compr = UBIFS_COMPR_LZO;
- 		else
- #endif
--			use_compr = c->default_compr;
-+			use_compr = force_compr;
- 		compr_type = compress_data(buf, bytes_read, &dn->data,
- 					   &out_len, use_compr);
- 		dn->compr_type = cpu_to_le16(compr_type);
---- a/mkfs.ubifs/mkfs.ubifs.h
-+++ b/mkfs.ubifs/mkfs.ubifs.h
-@@ -83,6 +83,9 @@
- #if MKFS_UBIFS_COMPR_ZLIB != UBIFS_COMPR_ZLIB
- #error MKFS_UBIFS_COMPR_ZLIB != UBIFS_COMPR_ZLIB
- #endif
-+#if MKFS_UBIFS_COMPR_XZ != UBIFS_COMPR_XZ
-+#error MKFS_UBIFS_COMPR_XZ != UBIFS_COMPR_XZ
-+#endif
- 
- extern int verbose;
- extern int debug_level;
---- a/include/mtd/ubifs-media.h
-+++ b/include/mtd/ubifs-media.h
-@@ -313,6 +313,7 @@ enum {
- 	UBIFS_COMPR_NONE,
- 	UBIFS_COMPR_LZO,
- 	UBIFS_COMPR_ZLIB,
-+	UBIFS_COMPR_XZ,
- 	UBIFS_COMPR_TYPES_CNT,
- };
- 
diff --git a/tools/mtd-utils/patches/310-add-static-linking-option.patch b/tools/mtd-utils/patches/310-add-static-linking-option.patch
index 810aea9a54..828d7751e5 100644
--- a/tools/mtd-utils/patches/310-add-static-linking-option.patch
+++ b/tools/mtd-utils/patches/310-add-static-linking-option.patch
@@ -32,12 +32,12 @@
  
  $(foreach v,$(MTD_BINS),$(eval $(call mkdep,,$(v))))
  
-@@ -119,7 +119,7 @@ else
-   XZLDLIBS = -llzma
+@@ -114,7 +114,7 @@ else
+   LZOLDLIBS = -llzo2
  endif
  
--LDLIBS_mkfs.ubifs = -lz $(LZOLDLIBS) $(XZLDLIBS) -lm -luuid
-+LDLIBS_mkfs.ubifs = $(call static_link,-lz $(LZOLDLIBS) $(XZLDLIBS)) -lm $(call static_link,-luuid)
+-LDLIBS_mkfs.ubifs = -lz $(LZOLDLIBS) -lm -luuid
++LDLIBS_mkfs.ubifs = $(call static_link,-lz $(LZOLDLIBS)) -lm $(call static_link,-luuid)
  $(call mkdep,mkfs.ubifs/,mkfs.ubifs,,ubi-utils/libubi.a)
  
  #