samples: separate into subdirectories by subsystem

1 files changed, 20 insertions, 0 deletions

diff --git a/testsuite/systemtap.examples/io/traceio2.stp b/testsuite/systemtap.examples/io/traceio2.stp
new file mode 100644
index 00000000..656c38b3
--- /dev/null
+++ b/testsuite/systemtap.examples/io/traceio2.stp
@@ -0,0 +1,20 @@
+global device_of_interest
+
+probe begin {
+  /* The following is not the most efficient way to do this.
+      One could directly put the result of usrdev2kerndev()
+      into device_of_interest.  However, want to test out
+      the other device functions */
+  dev = usrdev2kerndev($1)
+  device_of_interest = MKDEV(MAJOR(dev), MINOR(dev))
+}
+
+probe kernel.function ("vfs_write"),
+      kernel.function ("vfs_read")
+{
+        dev_nr = $file->f_path->dentry->d_inode->i_sb->s_dev
+
+        if (dev_nr == device_of_interest)
+                printf ("%s(%d) %s 0x%x\n",
+		        execname(), pid(), probefunc(), dev_nr)
+}