tools: Don't use the old bpf_probe_read() helper.

The old bpf_probe_read() helper doesn't work on s390 arch. Use
bpf_probe_read_user/kernel() instead.

Signed-off-by: Jerome Marchand <jmarchan@redhat.com>

Author: jeromemarchand

tools/filegone.py

@@ -67,7 +67,7 @@
     bpf_get_current_comm(&data.comm, sizeof(data.comm));
     data.pid = pid;
     data.action = 'D';
-    bpf_probe_read(&data.fname, sizeof(data.fname), d_name.name);
+    bpf_probe_read_kernel(&data.fname, sizeof(data.fname), d_name.name);
 
     currdata.update(&tid, &data);
 
@@ -92,8 +92,8 @@
     bpf_get_current_comm(&data.comm, sizeof(data.comm));
     data.pid = pid;
     data.action = 'R';
-    bpf_probe_read(&data.fname, sizeof(data.fname), s_name.name);
-    bpf_probe_read(&data.fname2, sizeof(data.fname), d_name.name);
+    bpf_probe_read_kernel(&data.fname, sizeof(data.fname), s_name.name);
+    bpf_probe_read_kernel(&data.fname2, sizeof(data.fname), d_name.name);
     currdata.update(&tid, &data);
 
     return 0;

tools/kvmexit.py

@@ -157,7 +157,7 @@ def valid_args_list(args):
             }
             // b.* As the cur_pid_tgid meets current pcpu_cache_array for the first time, save it.
             cache_p->cache_pid_tgid = cur_pid_tgid;
-            bpf_probe_read(&cache_p->cache_exit_ct, sizeof(*tmp_info), tmp_info);
+            bpf_probe_read_kernel(&cache_p->cache_exit_ct, sizeof(*tmp_info), tmp_info);
         }
         return 0;
     }

tools/netqtop.c

@@ -39,8 +39,8 @@ static inline int name_filter(struct sk_buff* skb){
     /* get device name from skb */
     union name_buf real_devname;
     struct net_device *dev;
-    bpf_probe_read(&dev, sizeof(skb->dev), ((char *)skb + offsetof(struct sk_buff, dev)));
-    bpf_probe_read(&real_devname, IFNAMSIZ, dev->name);
+    bpf_probe_read_kernel(&dev, sizeof(skb->dev), ((char *)skb + offsetof(struct sk_buff, dev)));
+    bpf_probe_read_kernel(&real_devname, IFNAMSIZ, dev->name);
 
     int key=0;
     union name_buf *leaf = name_map.lookup(&key);
@@ -97,7 +97,7 @@ TRACEPOINT_PROBE(net, net_dev_start_xmit){
 TRACEPOINT_PROBE(net, netif_receive_skb){
     struct sk_buff skb;
 
-    bpf_probe_read(&skb, sizeof(skb), args->skbaddr);
+    bpf_probe_read_kernel(&skb, sizeof(skb), args->skbaddr);
     if(!name_filter(&skb)){
         return 0;
     }

tools/tcpconnect.py

@@ -314,7 +314,7 @@
         return 0;
 
     void *iovbase = msghdr->msg_iter.IOV_FIELD->iov_base;
-    bpf_probe_read(data->pkt, buflen, iovbase);
+    bpf_probe_read_user(data->pkt, buflen, iovbase);
     dns_events.perf_submit(ctx, data, buflen);
 
 delete_and_return:
@@ -343,7 +343,7 @@
     if (!event)
         return 0;
 
-    bpf_probe_read(event->pkt, sizeof(event->pkt), data);
+    bpf_probe_read_kernel(event->pkt, sizeof(event->pkt), data);
     dns_events.perf_submit(ctx, event, sizeof(*event));
     return 0;
 }