From 80a32e5b498a7547073e5e4b2b804edc7219979d Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Thu, 29 Jan 2015 13:29:39 +0100 Subject: [PATCH] perf tools: Add lzma decompression support for kernel module In short, Fedora compresses kernel modules now (since version 21) with lzma compression. Adding lzma decompress support into the dso.c:compressions array introduced by Namhyung earlier. Signed-off-by: Jiri Olsa Acked-by: Namhyung Kim Cc: Adrian Hunter Cc: Corey Ashford Cc: David Ahern Cc: Frederic Weisbecker Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-2glp65kdtbrk0gblmirsjsnt@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Makefile.perf | 2 + tools/perf/config/Makefile | 11 +++++ tools/perf/util/Build | 1 + tools/perf/util/dso.c | 3 ++ tools/perf/util/lzma.c | 95 ++++++++++++++++++++++++++++++++++++++ tools/perf/util/util.h | 4 ++ 6 files changed, 116 insertions(+) create mode 100644 tools/perf/util/lzma.c diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index d5b9e0dae334..e9925e6ad1d0 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -71,6 +71,8 @@ include config/utilities.mak # # Define NO_LIBBABELTRACE if you do not want libbabeltrace support # for CTF data format. +# +# Define NO_LZMA if you do not want to support compressed (xz) kernel modules ifeq ($(srctree),) srctree := $(patsubst %/,%,$(dir $(shell pwd))) diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile index 6d1918a6b83b..cd121dfc4de9 100644 --- a/tools/perf/config/Makefile +++ b/tools/perf/config/Makefile @@ -541,6 +541,17 @@ ifndef NO_ZLIB endif endif +ifndef NO_LZMA + ifeq ($(feature-lzma), 1) + CFLAGS += -DHAVE_LZMA_SUPPORT + EXTLIBS += -llzma + $(call detected,CONFIG_LZMA) + else + msg := $(warning No liblzma found, disables xz kernel module decompression, please install xz-devel/liblzma-dev); + NO_LZMA := 1 + endif +endif + ifndef NO_BACKTRACE ifeq ($(feature-backtrace), 1) CFLAGS += -DHAVE_BACKTRACE_SUPPORT diff --git a/tools/perf/util/Build b/tools/perf/util/Build index 972a6e0da7ad..797490a40075 100644 --- a/tools/perf/util/Build +++ b/tools/perf/util/Build @@ -94,6 +94,7 @@ libperf-y += scripting-engines/ libperf-$(CONFIG_PERF_REGS) += perf_regs.o libperf-$(CONFIG_ZLIB) += zlib.o +libperf-$(CONFIG_LZMA) += lzma.o CFLAGS_config.o += -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))" CFLAGS_exec_cmd.o += -DPERF_EXEC_PATH="BUILD_STR($(perfexecdir_SQ))" -DPREFIX="BUILD_STR($(prefix_SQ))" diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c index 814554d1b857..be368414036c 100644 --- a/tools/perf/util/dso.c +++ b/tools/perf/util/dso.c @@ -147,6 +147,9 @@ static const struct { } compressions[] = { #ifdef HAVE_ZLIB_SUPPORT { "gz", gzip_decompress_to_file }, +#endif +#ifdef HAVE_LZMA_SUPPORT + { "xz", lzma_decompress_to_file }, #endif { NULL, NULL }, }; diff --git a/tools/perf/util/lzma.c b/tools/perf/util/lzma.c new file mode 100644 index 000000000000..95a1acb61245 --- /dev/null +++ b/tools/perf/util/lzma.c @@ -0,0 +1,95 @@ +#include +#include +#include +#include "util.h" +#include "debug.h" + +#define BUFSIZE 8192 + +static const char *lzma_strerror(lzma_ret ret) +{ + switch ((int) ret) { + case LZMA_MEM_ERROR: + return "Memory allocation failed"; + case LZMA_OPTIONS_ERROR: + return "Unsupported decompressor flags"; + case LZMA_FORMAT_ERROR: + return "The input is not in the .xz format"; + case LZMA_DATA_ERROR: + return "Compressed file is corrupt"; + case LZMA_BUF_ERROR: + return "Compressed file is truncated or otherwise corrupt"; + default: + return "Unknown error, possibly a bug"; + } +} + +int lzma_decompress_to_file(const char *input, int output_fd) +{ + lzma_action action = LZMA_RUN; + lzma_stream strm = LZMA_STREAM_INIT; + lzma_ret ret; + + u8 buf_in[BUFSIZE]; + u8 buf_out[BUFSIZE]; + FILE *infile; + + infile = fopen(input, "rb"); + if (!infile) { + pr_err("lzma: fopen failed on %s: '%s'\n", + input, strerror(errno)); + return -1; + } + + ret = lzma_stream_decoder(&strm, UINT64_MAX, LZMA_CONCATENATED); + if (ret != LZMA_OK) { + pr_err("lzma: lzma_stream_decoder failed %s (%d)\n", + lzma_strerror(ret), ret); + return -1; + } + + strm.next_in = NULL; + strm.avail_in = 0; + strm.next_out = buf_out; + strm.avail_out = sizeof(buf_out); + + while (1) { + if (strm.avail_in == 0 && !feof(infile)) { + strm.next_in = buf_in; + strm.avail_in = fread(buf_in, 1, sizeof(buf_in), infile); + + if (ferror(infile)) { + pr_err("lzma: read error: %s\n", strerror(errno)); + return -1; + } + + if (feof(infile)) + action = LZMA_FINISH; + } + + ret = lzma_code(&strm, action); + + if (strm.avail_out == 0 || ret == LZMA_STREAM_END) { + ssize_t write_size = sizeof(buf_out) - strm.avail_out; + + if (writen(output_fd, buf_out, write_size) != write_size) { + pr_err("lzma: write error: %s\n", strerror(errno)); + return -1; + } + + strm.next_out = buf_out; + strm.avail_out = sizeof(buf_out); + } + + if (ret != LZMA_OK) { + if (ret == LZMA_STREAM_END) + return 0; + + pr_err("lzma: failed %s\n", lzma_strerror(ret)); + return -1; + } + } + + fclose(infile); + return 0; +} diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h index fbd598afc606..1ff23e04ad27 100644 --- a/tools/perf/util/util.h +++ b/tools/perf/util/util.h @@ -329,4 +329,8 @@ bool find_process(const char *name); int gzip_decompress_to_file(const char *input, int output_fd); #endif +#ifdef HAVE_LZMA_SUPPORT +int lzma_decompress_to_file(const char *input, int output_fd); +#endif + #endif /* GIT_COMPAT_UTIL_H */ -- 2.20.1