[PATCH] filename in tapset nfs.proc.open and nfs.proc.release

[hai wu]

tapset nfs.proc.open and nfs.proc.release in nfs_proc.stp only records
file's basename, which is not helpful when we use it to monitor NFS
file access activities.

The following patch would allow us to be able to see the full path for
NFS file, along with its NFS mount information.

diff --git a/tapset/linux/nfs_proc.stp b/tapset/linux/nfs_proc.stp
index 1339aee..5a804e4 100644
--- a/tapset/linux/nfs_proc.stp
+++ b/tapset/linux/nfs_proc.stp
@@ -1658,7 +1658,7 @@ probe nfs.proc.open = kernel.function("nfs_open") !,
        prot = get_prot_from_client(client)
        version = __nfs_version($inode)

-       filename = __file_filename($filp)
+  filename = task_dentry_path(task_current(), $filp->f_dentry, $filp->f_vfsmnt)
        flag = $filp->f_flags
        mode = $filp->f_mode

@@ -1693,7 +1693,7 @@ probe nfs.proc.release = kernel.function("nfs_release") !,
        prot = get_prot_from_client(client)
        version = __nfs_version($inode)

-       filename = __file_filename($filp)
+  filename = task_dentry_path(task_current(), $filp->f_dentry, $filp->f_vfsmnt)
        flag = $filp->f_flags
        mode = $filp->f_mode