diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/topics/usdt-probes.rst | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/topics/usdt-probes.rst b/Documentation/topics/usdt-probes.rst index 8aa596b80..856d579f6 100644 --- a/Documentation/topics/usdt-probes.rst +++ b/Documentation/topics/usdt-probes.rst @@ -202,10 +202,36 @@ used naming convention. Available probes in ``ovs_vswitchd``: +- dpif_recv:recv_upcall - main:poll_block - main:run_start +probe dpif_recv:recv_upcall +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +**Description**: + +This probe gets triggered when the datapath independent layer gets notified +that a packet needs to be processed by userspace. This allows the probe to +intercept all packets sent by the kernel to ``ovs-vswitchd``. The +``upcall_monitor.py`` script uses this probe to display and capture all packets +sent to ``ovs-vswitchd``. + +**Arguments**: + +- *arg0*: ``(struct dpif *)->full_name`` +- *arg1*: ``(struct dpif_upcall *)->type`` +- *arg2*: ``dp_packet_data((struct dpif_upcall *)->packet)`` +- *arg3*: ``dp_packet_size((struct dpif_upcall *)->packet)`` +- *arg4*: ``(struct dpif_upcall *)->key`` +- *arg5*: ``(struct dpif_upcall *)->key_len`` + +**Script references**: + +- ``utilities/usdt-scripts/upcall_monitor.py`` + + probe main:run_start ~~~~~~~~~~~~~~~~~~~~ |