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Diffstat (limited to 'samples/bpf/tracex2_user.c')
-rw-r--r--samples/bpf/tracex2_user.c67
1 files changed, 58 insertions, 9 deletions
diff --git a/samples/bpf/tracex2_user.c b/samples/bpf/tracex2_user.c
index 91b8d0896fbb..cd0241c1447a 100644
--- a/samples/bpf/tracex2_user.c
+++ b/samples/bpf/tracex2_user.c
@@ -3,6 +3,7 @@
#include <stdlib.h>
#include <signal.h>
#include <linux/bpf.h>
+#include <string.h>
#include "libbpf.h"
#include "bpf_load.h"
@@ -20,23 +21,42 @@ static void stars(char *str, long val, long max, int width)
str[i] = '\0';
}
-static void print_hist(int fd)
+struct task {
+ char comm[16];
+ __u64 pid_tgid;
+ __u64 uid_gid;
+};
+
+struct hist_key {
+ struct task t;
+ __u32 index;
+};
+
+#define SIZE sizeof(struct task)
+
+static void print_hist_for_pid(int fd, void *task)
{
- int key;
+ struct hist_key key = {}, next_key;
+ char starstr[MAX_STARS];
long value;
long data[MAX_INDEX] = {};
- char starstr[MAX_STARS];
- int i;
int max_ind = -1;
long max_value = 0;
+ int i, ind;
- for (key = 0; key < MAX_INDEX; key++) {
- bpf_lookup_elem(fd, &key, &value);
- data[key] = value;
- if (value && key > max_ind)
- max_ind = key;
+ while (bpf_get_next_key(fd, &key, &next_key) == 0) {
+ if (memcmp(&next_key, task, SIZE)) {
+ key = next_key;
+ continue;
+ }
+ bpf_lookup_elem(fd, &next_key, &value);
+ ind = next_key.index;
+ data[ind] = value;
+ if (value && ind > max_ind)
+ max_ind = ind;
if (value > max_value)
max_value = value;
+ key = next_key;
}
printf(" syscall write() stats\n");
@@ -48,6 +68,35 @@ static void print_hist(int fd)
MAX_STARS, starstr);
}
}
+
+static void print_hist(int fd)
+{
+ struct hist_key key = {}, next_key;
+ static struct task tasks[1024];
+ int task_cnt = 0;
+ int i;
+
+ while (bpf_get_next_key(fd, &key, &next_key) == 0) {
+ int found = 0;
+
+ for (i = 0; i < task_cnt; i++)
+ if (memcmp(&tasks[i], &next_key, SIZE) == 0)
+ found = 1;
+ if (!found)
+ memcpy(&tasks[task_cnt++], &next_key, SIZE);
+ key = next_key;
+ }
+
+ for (i = 0; i < task_cnt; i++) {
+ printf("\npid %d cmd %s uid %d\n",
+ (__u32) tasks[i].pid_tgid,
+ tasks[i].comm,
+ (__u32) tasks[i].uid_gid);
+ print_hist_for_pid(fd, &tasks[i]);
+ }
+
+}
+
static void int_exit(int sig)
{
print_hist(map_fd[1]);