From: Jiri Olsa <jo...@kernel.org> We will add a compression check in the following patch and it makes it easier if the file processing is done in a single place. It also makes the current code simpler.
The decompress_kmodule function now returns the fd of the uncompressed file and the file name in the pathname arg, if it's provided. Signed-off-by: Jiri Olsa <jo...@kernel.org> Cc: Alexander Shishkin <alexander.shish...@linux.intel.com> Cc: David Ahern <dsah...@gmail.com> Cc: Michael Petlan <mpet...@redhat.com> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Peter Zijlstra <pet...@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-10-jo...@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/util/dso.c | 29 ++++++++++++----------------- 1 file changed, 12 insertions(+), 17 deletions(-) diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c index 54bfe1f4762f..cbeecf683333 100644 --- a/tools/perf/util/dso.c +++ b/tools/perf/util/dso.c @@ -250,8 +250,10 @@ bool dso__needs_decompress(struct dso *dso) dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; } -static int decompress_kmodule(struct dso *dso, const char *name, char *tmpbuf) +static int decompress_kmodule(struct dso *dso, const char *name, + char *pathname, size_t len) { + char tmpbuf[] = KMOD_DECOMP_NAME; int fd = -1; if (!dso__needs_decompress(dso)) @@ -272,34 +274,27 @@ static int decompress_kmodule(struct dso *dso, const char *name, char *tmpbuf) fd = -1; } + if (!pathname || (fd < 0)) + unlink(tmpbuf); + + if (pathname && (fd >= 0)) + strncpy(pathname, tmpbuf, len); + return fd; } int dso__decompress_kmodule_fd(struct dso *dso, const char *name) { - char tmpbuf[] = KMOD_DECOMP_NAME; - int fd; - - fd = decompress_kmodule(dso, name, tmpbuf); - unlink(tmpbuf); - return fd; + return decompress_kmodule(dso, name, NULL, 0); } int dso__decompress_kmodule_path(struct dso *dso, const char *name, char *pathname, size_t len) { - char tmpbuf[] = KMOD_DECOMP_NAME; - int fd; - - fd = decompress_kmodule(dso, name, tmpbuf); - if (fd < 0) { - unlink(tmpbuf); - return -1; - } + int fd = decompress_kmodule(dso, name, pathname, len); - strncpy(pathname, tmpbuf, len); close(fd); - return 0; + return fd >= 0 ? 0 : -1; } /* -- 2.14.4
