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| author | Namhyung Kim <namhyung@gmail.com> | 2017-11-08 00:31:35 +0900 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2017-12-18 14:37:36 +0000 |
| commit | babfff8e11589a2d1ab9ca777ebb16495f708616 (patch) | |
| tree | e2b9daadefb12162270a9491c95f278d2f2d86a0 /trace | |
| parent | 5070570c9089b905dd9efae30ee4318033c6ccd6 (diff) | |
| download | qemu-babfff8e11589a2d1ab9ca777ebb16495f708616.zip | |
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 <namhyung@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'trace')
| -rw-r--r-- | trace/ftrace.c | 14 |
1 files changed, 7 insertions, 7 deletions
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"); |