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authorMohsin Kazmi <sykazmi@cisco.com>2023-03-07 11:07:56 +0000
committerDamjan Marion <dmarion@0xa5.net>2023-03-10 15:54:22 +0000
commit7b0d48fbb3ceebcafb18177fba02ab1a9ad4c24e (patch)
tree470661b8958c8eb70a452d93ea307b53c18eb642
parent66c675e1a514a85ac56faf686fb96b63505c994f (diff)
af_packet: fix the broken functionality upon admin down
Type: fix In vpp, file descriptor handler closes the fd upon error if there is no error handling function is registered. This patch fixes the issue for af_packet interface by registering the error handling function. Errors will also be gracefully logged. Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com> Change-Id: I260d780ac54ffd0199dcd6ca5b95e5afe957e968
-rw-r--r--src/plugins/af_packet/af_packet.c21
-rw-r--r--src/plugins/af_packet/device.c45
2 files changed, 25 insertions, 41 deletions
diff --git a/src/plugins/af_packet/af_packet.c b/src/plugins/af_packet/af_packet.c
index b2f860e658d..f505fac9e2c 100644
--- a/src/plugins/af_packet/af_packet.c
+++ b/src/plugins/af_packet/af_packet.c
@@ -110,6 +110,26 @@ af_packet_fd_read_ready (clib_file_t * uf)
return 0;
}
+static clib_error_t *
+af_packet_fd_error (clib_file_t *uf)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ clib_error_t *err = 0;
+ u64 u64;
+
+ int ret = read (uf->file_descriptor, (char *) &u64, sizeof (u64));
+
+ if (ret < 0)
+ {
+ err = clib_error_return_unix (0, "");
+ vlib_log_notice (apm->log_class, "fd %u %U", uf->file_descriptor,
+ format_clib_error, err);
+ clib_error_free (err);
+ }
+
+ return 0;
+}
+
static int
is_bridge (const u8 * host_if_name)
{
@@ -146,6 +166,7 @@ af_packet_set_rx_queues (vlib_main_t *vm, af_packet_if_t *apif)
{
clib_file_t template = { 0 };
template.read_function = af_packet_fd_read_ready;
+ template.error_function = af_packet_fd_error;
template.file_descriptor = rx_queue->fd;
template.private_data = rx_queue->queue_index;
template.flags = UNIX_FILE_EVENT_EDGE_TRIGGERED;
diff --git a/src/plugins/af_packet/device.c b/src/plugins/af_packet/device.c
index 27f5559c8cd..fc6733fc446 100644
--- a/src/plugins/af_packet/device.c
+++ b/src/plugins/af_packet/device.c
@@ -35,6 +35,7 @@
#include <af_packet/af_packet.h>
#include <vnet/devices/virtio/virtio_std.h>
+#include <vnet/devices/netlink.h>
#define foreach_af_packet_tx_func_error \
_(FRAME_NOT_READY, "tx frame not ready") \
@@ -654,63 +655,25 @@ af_packet_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
af_packet_if_t *apif =
pool_elt_at_index (apm->interfaces, hw->dev_instance);
u32 hw_flags;
- int rv, fd = socket (AF_UNIX, SOCK_DGRAM, 0);
- struct ifreq ifr;
-
- if (0 > fd)
- {
- vlib_log_warn (apm->log_class, "af_packet_%s could not open socket",
- apif->host_if_name);
- return 0;
- }
- /* if interface is a bridge ignore */
if (apif->host_if_index < 0)
- goto error; /* no error */
-
- /* use host_if_index in case host name has changed */
- ifr.ifr_ifindex = apif->host_if_index;
- if ((rv = ioctl (fd, SIOCGIFNAME, &ifr)) < 0)
- {
- vlib_log_warn (apm->log_class,
- "af_packet_%s ioctl could not retrieve eth name",
- apif->host_if_name);
- goto error;
- }
+ return 0; /* no error */
apif->is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
- if ((rv = ioctl (fd, SIOCGIFFLAGS, &ifr)) < 0)
- {
- vlib_log_warn (apm->log_class, "af_packet_%s error: %d",
- apif->is_admin_up ? "up" : "down", rv);
- goto error;
- }
-
if (apif->is_admin_up)
{
hw_flags = VNET_HW_INTERFACE_FLAG_LINK_UP;
- ifr.ifr_flags |= IFF_UP;
+ vnet_netlink_set_link_state (apif->host_if_index, 1);
}
else
{
hw_flags = 0;
- ifr.ifr_flags &= ~IFF_UP;
- }
-
- if ((rv = ioctl (fd, SIOCSIFFLAGS, &ifr)) < 0)
- {
- vlib_log_warn (apm->log_class, "af_packet_%s error: %d",
- apif->is_admin_up ? "up" : "down", rv);
- goto error;
+ vnet_netlink_set_link_state (apif->host_if_index, 0);
}
vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
-error:
- if (0 <= fd)
- close (fd);
-
return 0; /* no error */
}