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authorJiri Olsa <jolsa@kernel.org>2018-08-17 11:48:09 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-08-20 08:54:59 -0300
commitc9a8a6131fb68f6eabec34fd855e69b4855155e4 (patch)
tree3da5dd231fc0fcaf1b31610f884230a97c10387a /tools/perf/util/dso.c
parentdde755a90e98a1c57f6a92d1a79bc5554024065c (diff)
perf tools: Move the temp file processing into decompress_kmodule
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 <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-10-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/dso.c')
-rw-r--r--tools/perf/util/dso.c29
1 files 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;
}
/*