From babfff8e11589a2d1ab9ca777ebb16495f708616 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Wed, 8 Nov 2017 00:31:35 +0900 Subject: trace: Generalize searching for debugfs The find_debugfs() can be shared to find a different filesystem like tracefs. So make it more general and rename to find_mount(). Signed-off-by: Namhyung Kim Signed-off-by: Stefan Hajnoczi --- trace/ftrace.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) (limited to 'trace') diff --git a/trace/ftrace.c b/trace/ftrace.c index bfa38e71f0..213cb2205f 100644 --- a/trace/ftrace.c +++ b/trace/ftrace.c @@ -15,7 +15,7 @@ int trace_marker_fd; -static int find_debugfs(char *debugfs) +static int find_mount(char *mount_point, const char *fstype) { char type[100]; FILE *fp; @@ -27,8 +27,8 @@ static int find_debugfs(char *debugfs) } while (fscanf(fp, "%*s %" STR(PATH_MAX) "s %99s %*s %*d %*d\n", - debugfs, type) == 2) { - if (strcmp(type, "debugfs") == 0) { + mount_point, type) == 2) { + if (strcmp(type, fstype) == 0) { ret = 1; break; } @@ -40,14 +40,14 @@ static int find_debugfs(char *debugfs) bool ftrace_init(void) { - char debugfs[PATH_MAX]; + char mount_point[PATH_MAX]; char path[PATH_MAX]; int debugfs_found; int trace_fd = -1; - debugfs_found = find_debugfs(debugfs); + debugfs_found = find_mount(mount_point, "debugfs"); if (debugfs_found) { - snprintf(path, PATH_MAX, "%s/tracing/tracing_on", debugfs); + snprintf(path, PATH_MAX, "%s/tracing/tracing_on", mount_point); trace_fd = open(path, O_WRONLY); if (trace_fd < 0) { if (errno == EACCES) { @@ -66,7 +66,7 @@ bool ftrace_init(void) } close(trace_fd); } - snprintf(path, PATH_MAX, "%s/tracing/trace_marker", debugfs); + snprintf(path, PATH_MAX, "%s/tracing/trace_marker", mount_point); trace_marker_fd = open(path, O_WRONLY); if (trace_marker_fd < 0) { perror("Could not open ftrace 'trace_marker' file"); -- cgit v1.2.1