iPXE
Macros | Functions | Variables
netdevice.c File Reference

Network device management. More...

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <byteswap.h>
#include <string.h>
#include <errno.h>
#include <config/general.h>
#include <ipxe/if_ether.h>
#include <ipxe/iobuf.h>
#include <ipxe/tables.h>
#include <ipxe/process.h>
#include <ipxe/init.h>
#include <ipxe/malloc.h>
#include <ipxe/device.h>
#include <ipxe/errortab.h>
#include <ipxe/profile.h>
#include <ipxe/fault.h>
#include <ipxe/vlan.h>
#include <ipxe/netdevice.h>

Go to the source code of this file.

Macros

#define EUNKNOWN_LINK_STATUS   __einfo_error ( EINFO_EUNKNOWN_LINK_STATUS )
 Default unknown link status code. More...
 
#define EINFO_EUNKNOWN_LINK_STATUS   __einfo_uniqify ( EINFO_EINPROGRESS, 0x01, "Unknown" )
 
#define EUNUSED_CONFIG   __einfo_error ( EINFO_EUNUSED_CONFIG )
 Default not-yet-attempted-configuration status code. More...
 
#define EINFO_EUNUSED_CONFIG   __einfo_uniqify ( EINFO_EINPROGRESS, 0x02, "Unused" )
 
#define EINPROGRESS_CONFIG   __einfo_error ( EINFO_EINPROGRESS_CONFIG )
 Default configuration-in-progress status code. More...
 
#define EINFO_EINPROGRESS_CONFIG   __einfo_uniqify ( EINFO_EINPROGRESS, 0x03, "Incomplete" )
 
#define ENOTCONN_LINK_DOWN   __einfo_error ( EINFO_ENOTCONN_LINK_DOWN )
 Default link-down status code. More...
 
#define EINFO_ENOTCONN_LINK_DOWN   __einfo_uniqify ( EINFO_ENOTCONN, 0x01, "Down" )
 

Functions

 FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
 
static int netdev_has_ll_addr (struct net_device *netdev)
 Check whether or not network device has a link-layer address. More...
 
static void netdev_notify (struct net_device *netdev)
 Notify drivers of network device or link state change. More...
 
void netdev_rx_freeze (struct net_device *netdev)
 Freeze network device receive queue processing. More...
 
void netdev_rx_unfreeze (struct net_device *netdev)
 Unfreeze network device receive queue processing. More...
 
void netdev_link_err (struct net_device *netdev, int rc)
 Mark network device as having a specific link state. More...
 
void netdev_link_down (struct net_device *netdev)
 Mark network device as having link down. More...
 
void netdev_link_block (struct net_device *netdev, unsigned long timeout)
 Mark network device link as being blocked. More...
 
void netdev_link_unblock (struct net_device *netdev)
 Mark network device link as being unblocked. More...
 
static void netdev_link_block_expired (struct retry_timer *timer, int fail __unused)
 Handle network device link block timer expiry. More...
 
static void netdev_record_stat (struct net_device_stats *stats, int rc)
 Record network device statistic. More...
 
int netdev_tx (struct net_device *netdev, struct io_buffer *iobuf)
 Transmit raw packet via network device. More...
 
void netdev_tx_defer (struct net_device *netdev, struct io_buffer *iobuf)
 Defer transmitted packet. More...
 
void netdev_tx_err (struct net_device *netdev, struct io_buffer *iobuf, int rc)
 Discard transmitted packet. More...
 
void netdev_tx_complete_err (struct net_device *netdev, struct io_buffer *iobuf, int rc)
 Complete network transmission. More...
 
void netdev_tx_complete_next_err (struct net_device *netdev, int rc)
 Complete network transmission. More...
 
static void netdev_tx_flush (struct net_device *netdev)
 Flush device's transmit queue. More...
 
void netdev_rx (struct net_device *netdev, struct io_buffer *iobuf)
 Add packet to receive queue. More...
 
void netdev_rx_err (struct net_device *netdev, struct io_buffer *iobuf, int rc)
 Discard received packet. More...
 
void netdev_poll (struct net_device *netdev)
 Poll for completed and received packets on network device. More...
 
struct io_buffernetdev_rx_dequeue (struct net_device *netdev)
 Remove packet from device's receive queue. More...
 
static void netdev_rx_flush (struct net_device *netdev)
 Flush device's receive queue. More...
 
static void netdev_config_close (struct net_device_configuration *config, int rc)
 Finish network device configuration. More...
 
static void free_netdev (struct refcnt *refcnt)
 Free network device. More...
 
struct net_devicealloc_netdev (size_t priv_len)
 Allocate network device. More...
 
int register_netdev (struct net_device *netdev)
 Register network device. More...
 
int netdev_open (struct net_device *netdev)
 Open network device. More...
 
void netdev_close (struct net_device *netdev)
 Close network device. More...
 
void unregister_netdev (struct net_device *netdev)
 Unregister network device. More...
 
void netdev_irq (struct net_device *netdev, int enable)
 Enable or disable interrupts. More...
 
struct net_devicefind_netdev (const char *name)
 Get network device by name. More...
 
struct net_devicefind_netdev_by_scope_id (unsigned int scope_id)
 Get network device by scope ID. More...
 
struct net_devicefind_netdev_by_location (unsigned int bus_type, unsigned int location)
 Get network device by PCI bus:dev.fn address. More...
 
struct net_devicelast_opened_netdev (void)
 Get most recently opened network device. More...
 
int net_tx (struct io_buffer *iobuf, struct net_device *netdev, struct net_protocol *net_protocol, const void *ll_dest, const void *ll_source)
 Transmit network-layer packet. More...
 
int net_rx (struct io_buffer *iobuf, struct net_device *netdev, uint16_t net_proto, const void *ll_dest, const void *ll_source, unsigned int flags)
 Process received network-layer packet. More...
 
void net_poll (void)
 Poll the network stack. More...
 
static void net_step (struct process *process __unused)
 Single-step the network stack. More...
 
__weak unsigned int vlan_tci (struct net_device *netdev __unused)
 Get the VLAN tag control information (when VLAN support is not present) More...
 
__weak void vlan_netdev_rx (struct net_device *netdev, unsigned int tag, struct io_buffer *iobuf)
 Add VLAN tag-stripped packet to queue (when VLAN support is not present) More...
 
__weak void vlan_netdev_rx_err (struct net_device *netdev, unsigned int tag __unused, struct io_buffer *iobuf, int rc)
 Discard received VLAN tag-stripped packet (when VLAN support is not present) More...
 
 PERMANENT_PROCESS (net_process, net_step)
 Networking stack process. More...
 
static unsigned int net_discard (void)
 Discard some cached network device data. More...
 
struct cache_discarder net_discarder __cache_discarder (CACHE_NORMAL)
 Network device cache discarder. More...
 
struct net_device_configuratorfind_netdev_configurator (const char *name)
 Find network device configurator. More...
 
int netdev_configure (struct net_device *netdev, struct net_device_configurator *configurator)
 Start network device configuration. More...
 
int netdev_configure_all (struct net_device *netdev)
 Start network device configuration via all supported configurators. More...
 
static int netdev_has_configuration_rc (struct net_device *netdev, int rc)
 Check if network device has a configuration with a specified status code. More...
 
int netdev_configuration_in_progress (struct net_device *netdev)
 Check if network device configuration is in progress. More...
 
int netdev_configuration_ok (struct net_device *netdev)
 Check if network device has at least one successful configuration. More...
 

Variables

struct list_head net_devices = LIST_HEAD_INIT ( net_devices )
 List of network devices. More...
 
static struct list_head open_net_devices = LIST_HEAD_INIT ( open_net_devices )
 List of open network devices, in reverse order of opening. More...
 
static struct profiler net_poll_profiler __profiler = { .name = "net.poll" }
 Network polling profiler. More...
 
struct errortab netdev_errors [] __errortab
 Human-readable message for the default link statuses. More...
 
static struct interface_operation netdev_config_ops []
 Network device configuration interface operations. More...
 
static struct interface_descriptor netdev_config_desc
 Network device configuration interface descriptor. More...
 

Detailed Description

Network device management.

Definition in file netdevice.c.

Macro Definition Documentation

◆ EUNKNOWN_LINK_STATUS

#define EUNKNOWN_LINK_STATUS   __einfo_error ( EINFO_EUNKNOWN_LINK_STATUS )

Default unknown link status code.

Definition at line 68 of file netdevice.c.

◆ EINFO_EUNKNOWN_LINK_STATUS

#define EINFO_EUNKNOWN_LINK_STATUS   __einfo_uniqify ( EINFO_EINPROGRESS, 0x01, "Unknown" )

Definition at line 69 of file netdevice.c.

◆ EUNUSED_CONFIG

#define EUNUSED_CONFIG   __einfo_error ( EINFO_EUNUSED_CONFIG )

Default not-yet-attempted-configuration status code.

Definition at line 73 of file netdevice.c.

◆ EINFO_EUNUSED_CONFIG

#define EINFO_EUNUSED_CONFIG   __einfo_uniqify ( EINFO_EINPROGRESS, 0x02, "Unused" )

Definition at line 74 of file netdevice.c.

◆ EINPROGRESS_CONFIG

#define EINPROGRESS_CONFIG   __einfo_error ( EINFO_EINPROGRESS_CONFIG )

Default configuration-in-progress status code.

Definition at line 78 of file netdevice.c.

◆ EINFO_EINPROGRESS_CONFIG

#define EINFO_EINPROGRESS_CONFIG   __einfo_uniqify ( EINFO_EINPROGRESS, 0x03, "Incomplete" )

Definition at line 79 of file netdevice.c.

◆ ENOTCONN_LINK_DOWN

#define ENOTCONN_LINK_DOWN   __einfo_error ( EINFO_ENOTCONN_LINK_DOWN )

Default link-down status code.

Definition at line 83 of file netdevice.c.

◆ EINFO_ENOTCONN_LINK_DOWN

#define EINFO_ENOTCONN_LINK_DOWN   __einfo_uniqify ( EINFO_ENOTCONN, 0x01, "Down" )

Definition at line 84 of file netdevice.c.

Function Documentation

◆ FILE_LICENCE()

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL  )

◆ netdev_has_ll_addr()

static int netdev_has_ll_addr ( struct net_device netdev)
static

Check whether or not network device has a link-layer address.

Parameters
netdevNetwork device
Return values
has_ll_addrNetwork device has a link-layer address

Definition at line 101 of file netdevice.c.

101  {
102  uint8_t *ll_addr = netdev->ll_addr;
103  size_t remaining = sizeof ( netdev->ll_addr );
104 
105  while ( remaining-- ) {
106  if ( *(ll_addr++) != 0 )
107  return 1;
108  }
109  return 0;
110 }
static struct net_device * netdev
Definition: gdbudp.c:52
unsigned char uint8_t
Definition: stdint.h:10
uint8_t ll_addr[MAX_LL_ADDR_LEN]
Link-layer address.
Definition: netdevice.h:387

References net_device::ll_addr, and netdev.

Referenced by register_netdev().

◆ netdev_notify()

static void netdev_notify ( struct net_device netdev)
static

Notify drivers of network device or link state change.

Parameters
netdevNetwork device

Definition at line 117 of file netdevice.c.

117  {
118  struct net_driver *driver;
119 
120  for_each_table_entry ( driver, NET_DRIVERS ) {
121  if ( driver->notify )
122  driver->notify ( netdev );
123  }
124 }
A network upper-layer driver.
Definition: netdevice.h:473
static struct net_device * netdev
Definition: gdbudp.c:52
#define NET_DRIVERS
Network driver table.
Definition: netdevice.h:495
#define for_each_table_entry(pointer, table)
Iterate through all entries within a linker table.
Definition: tables.h:385
void(* notify)(struct net_device *netdev)
Notify of device or link state change.
Definition: netdevice.h:486

References for_each_table_entry, NET_DRIVERS, netdev, and net_driver::notify.

Referenced by netdev_close(), netdev_link_err(), netdev_open(), netdev_rx_freeze(), and netdev_rx_unfreeze().

◆ netdev_rx_freeze()

void netdev_rx_freeze ( struct net_device netdev)

Freeze network device receive queue processing.

Parameters
netdevNetwork device

Definition at line 131 of file netdevice.c.

131  {
132 
133  /* Mark receive queue processing as frozen */
135 
136  /* Notify drivers of change */
137  netdev_notify ( netdev );
138 }
#define NETDEV_RX_FROZEN
Network device receive queue processing is frozen.
Definition: netdevice.h:444
unsigned int state
Current device state.
Definition: netdevice.h:395
static struct net_device * netdev
Definition: gdbudp.c:52
static void netdev_notify(struct net_device *netdev)
Notify drivers of network device or link state change.
Definition: netdevice.c:117

References netdev, netdev_notify(), NETDEV_RX_FROZEN, and net_device::state.

Referenced by pxe_netdev_open(), and pxenv_undi_transmit().

◆ netdev_rx_unfreeze()

void netdev_rx_unfreeze ( struct net_device netdev)

Unfreeze network device receive queue processing.

Parameters
netdevNetwork device

Definition at line 145 of file netdevice.c.

145  {
146 
147  /* Mark receive queue processing as not frozen */
149 
150  /* Notify drivers of change */
151  netdev_notify ( netdev );
152 }
#define NETDEV_RX_FROZEN
Network device receive queue processing is frozen.
Definition: netdevice.h:444
unsigned int state
Current device state.
Definition: netdevice.h:395
static struct net_device * netdev
Definition: gdbudp.c:52
static void netdev_notify(struct net_device *netdev)
Notify drivers of network device or link state change.
Definition: netdevice.c:117

References netdev, netdev_notify(), NETDEV_RX_FROZEN, and net_device::state.

Referenced by pxe_netdev_close(), and pxe_set_netdev().

◆ netdev_link_err()

void netdev_link_err ( struct net_device netdev,
int  rc 
)

Mark network device as having a specific link state.

Parameters
netdevNetwork device
rcLink status code

Definition at line 160 of file netdevice.c.

160  {
161 
162  /* Stop link block timer */
164 
165  /* Record link state */
166  netdev->link_rc = rc;
167  if ( netdev->link_rc == 0 ) {
168  DBGC ( netdev, "NETDEV %s link is up\n", netdev->name );
169  } else {
170  DBGC ( netdev, "NETDEV %s link is down: %s\n",
171  netdev->name, strerror ( netdev->link_rc ) );
172  }
173 
174  /* Notify drivers of link state change */
175  netdev_notify ( netdev );
176 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
struct retry_timer link_block
Link block timer.
Definition: netdevice.h:403
#define DBGC(...)
Definition: compiler.h:505
int link_rc
Link status code.
Definition: netdevice.h:401
static struct net_device * netdev
Definition: gdbudp.c:52
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
void stop_timer(struct retry_timer *timer)
Stop timer.
Definition: retry.c:117
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362
static void netdev_notify(struct net_device *netdev)
Notify drivers of network device or link state change.
Definition: netdevice.c:117

References DBGC, net_device::link_block, net_device::link_rc, net_device::name, netdev, netdev_notify(), rc, stop_timer(), and strerror().

Referenced by eoib_join_complete(), eoib_link_state_changed(), iphone_check_link(), ipoib_join_complete(), ipoib_link_state_changed(), net80211_deauthenticate(), net80211_set_state(), net80211_step_associate(), netdev_link_down(), netdev_link_up(), netfront_close(), rhine_check_link(), skeleton_check_link(), and vlan_sync().

◆ netdev_link_down()

void netdev_link_down ( struct net_device netdev)

Mark network device as having link down.

Parameters
netdevNetwork device

Definition at line 183 of file netdevice.c.

183  {
184 
185  /* Avoid clobbering a more detailed link status code, if one
186  * is already set.
187  */
188  if ( ( netdev->link_rc == 0 ) ||
189  ( netdev->link_rc == -EUNKNOWN_LINK_STATUS ) ) {
191  }
192 }
#define EUNKNOWN_LINK_STATUS
Default unknown link status code.
Definition: netdevice.c:68
int link_rc
Link status code.
Definition: netdevice.h:401
static struct net_device * netdev
Definition: gdbudp.c:52
void netdev_link_err(struct net_device *netdev, int rc)
Mark network device as having a specific link state.
Definition: netdevice.c:160
#define ENOTCONN_LINK_DOWN
Default link-down status code.
Definition: netdevice.c:83

References ENOTCONN_LINK_DOWN, EUNKNOWN_LINK_STATUS, net_device::link_rc, netdev, and netdev_link_err().

Referenced by __vxge_hw_vpath_alarm_process(), atl1e_check_link(), atl1e_down(), axge_check_link(), bnxt_set_link(), dm96xx_link_nsr(), ecm_intr_complete(), exanic_check_link(), flexboot_nodnic_state_change_netdev(), forcedeth_link_status(), hermon_state_change_netdev(), hunt_check_link(), hunt_open(), ice_admin_link(), icplus_check_link(), intel_check_link(), intelx_check_link(), intelxl_admin_link(), intelxlvf_admin_link(), intelxvf_check_link(), jme_check_link(), jme_close(), jme_link_change(), mii_check_link(), myri10ge_interrupt_handler(), natsemi_check_link(), ncm_intr_complete(), net80211_netdev_close(), net80211_set_state(), netfront_close(), netfront_probe(), nii_poll_link(), phantom_poll_link_state(), realtek_check_link(), rhine_check_link(), rndis_rx_query_oid(), rndis_rx_status(), sis190_phy_task(), skge_down(), skge_link_down(), sky2_link_down(), sky2_up(), snpnet_check_link(), tg3_phy_reset(), tg3_setup_copper_phy(), tg3_setup_fiber_mii_phy(), tg3_test_and_report_link_chg(), txnic_lmac_update_link(), velocity_check_link(), vmxnet3_check_link(), vxge_close(), and vxge_open().

◆ netdev_link_block()

void netdev_link_block ( struct net_device netdev,
unsigned long  timeout 
)

Mark network device link as being blocked.

Parameters
netdevNetwork device
timeoutTimeout (in ticks)

Definition at line 200 of file netdevice.c.

200  {
201 
202  /* Start link block timer */
203  if ( ! netdev_link_blocked ( netdev ) ) {
204  DBGC ( netdev, "NETDEV %s link blocked for %ld ticks\n",
205  netdev->name, timeout );
206  }
208 }
struct retry_timer link_block
Link block timer.
Definition: netdevice.h:403
#define DBGC(...)
Definition: compiler.h:505
static int netdev_link_blocked(struct net_device *netdev)
Check link block state of network device.
Definition: netdevice.h:653
static struct net_device * netdev
Definition: gdbudp.c:52
void start_timer_fixed(struct retry_timer *timer, unsigned long timeout)
Start timer with a specified timeout.
Definition: retry.c:64
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362
void timeout(int)

References DBGC, net_device::link_block, net_device::name, netdev, netdev_link_blocked(), start_timer_fixed(), and timeout().

Referenced by eap_rx_request_identity(), eth_slow_lacp_rx(), and stp_rx().

◆ netdev_link_unblock()

void netdev_link_unblock ( struct net_device netdev)

Mark network device link as being unblocked.

Parameters
netdevNetwork device

Definition at line 215 of file netdevice.c.

215  {
216 
217  /* Stop link block timer */
218  if ( netdev_link_blocked ( netdev ) )
219  DBGC ( netdev, "NETDEV %s link unblocked\n", netdev->name );
221 }
struct retry_timer link_block
Link block timer.
Definition: netdevice.h:403
#define DBGC(...)
Definition: compiler.h:505
static int netdev_link_blocked(struct net_device *netdev)
Check link block state of network device.
Definition: netdevice.h:653
static struct net_device * netdev
Definition: gdbudp.c:52
void stop_timer(struct retry_timer *timer)
Stop timer.
Definition: retry.c:117
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362

References DBGC, net_device::link_block, net_device::name, netdev, netdev_link_blocked(), and stop_timer().

Referenced by eap_rx_success(), eth_slow_lacp_rx(), and stp_rx().

◆ netdev_link_block_expired()

static void netdev_link_block_expired ( struct retry_timer timer,
int fail  __unused 
)
static

Handle network device link block timer expiry.

Parameters
timerLink block timer
failFailure indicator

Definition at line 229 of file netdevice.c.

230  {
231  struct net_device *netdev =
233 
234  /* Assume link is no longer blocked */
235  DBGC ( netdev, "NETDEV %s link block expired\n", netdev->name );
236 }
struct retry_timer link_block
Link block timer.
Definition: netdevice.h:403
#define DBGC(...)
Definition: compiler.h:505
A timer.
Definition: timer.h:28
#define container_of(ptr, type, field)
Get containing structure.
Definition: stddef.h:35
static struct net_device * netdev
Definition: gdbudp.c:52
A network device.
Definition: netdevice.h:352
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362

References container_of, DBGC, net_device::link_block, net_device::name, and netdev.

Referenced by alloc_netdev().

◆ netdev_record_stat()

static void netdev_record_stat ( struct net_device_stats stats,
int  rc 
)
static

Record network device statistic.

Parameters
statsNetwork device statistics
rcStatus code

Definition at line 244 of file netdevice.c.

244  {
245  struct net_device_error *error;
246  struct net_device_error *least_common_error;
247  unsigned int i;
248 
249  /* If this is not an error, just update the good counter */
250  if ( rc == 0 ) {
251  stats->good++;
252  return;
253  }
254 
255  /* Update the bad counter */
256  stats->bad++;
257 
258  /* Locate the appropriate error record */
259  least_common_error = &stats->errors[0];
260  for ( i = 0 ; i < ( sizeof ( stats->errors ) /
261  sizeof ( stats->errors[0] ) ) ; i++ ) {
262  error = &stats->errors[i];
263  /* Update matching record, if found */
264  if ( error->rc == rc ) {
265  error->count++;
266  return;
267  }
268  if ( error->count < least_common_error->count )
269  least_common_error = error;
270  }
271 
272  /* Overwrite the least common error record */
273  least_common_error->rc = rc;
274  least_common_error->count = 1;
275 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
struct arbelprm_completion_with_error error
Definition: arbel.h:12
Network device error.
Definition: netdevice.h:280
unsigned int count
Error count.
Definition: netdevice.h:284
unsigned int bad
Count of error completions.
Definition: netdevice.h:295
struct net_device_error errors[NETDEV_MAX_UNIQUE_ERRORS]
Error breakdowns.
Definition: netdevice.h:297
unsigned int good
Count of successful completions.
Definition: netdevice.h:293
int rc
Error status code.
Definition: netdevice.h:282

References net_device_stats::bad, net_device_error::count, error, net_device_stats::errors, net_device_stats::good, net_device_error::rc, and rc.

Referenced by netdev_rx(), netdev_rx_err(), and netdev_tx_err().

◆ netdev_tx()

int netdev_tx ( struct net_device netdev,
struct io_buffer iobuf 
)

Transmit raw packet via network device.

Parameters
netdevNetwork device
iobufI/O buffer
Return values
rcReturn status code

Transmits the packet via the specified network device. This function takes ownership of the I/O buffer.

Definition at line 287 of file netdevice.c.

287  {
288  int rc;
289 
290  DBGC2 ( netdev, "NETDEV %s transmitting %p (%p+%zx)\n",
291  netdev->name, iobuf, iobuf->data, iob_len ( iobuf ) );
292  profile_start ( &net_tx_profiler );
293 
294  /* Enqueue packet */
295  list_add_tail ( &iobuf->list, &netdev->tx_queue );
296 
297  /* Guard against re-entry */
299  rc = -EBUSY;
300  goto err_busy;
301  }
303 
304  /* Avoid calling transmit() on unopened network devices */
305  if ( ! netdev_is_open ( netdev ) ) {
306  rc = -ENETUNREACH;
307  goto err_closed;
308  }
309 
310  /* Discard packet (for test purposes) if applicable */
311  if ( ( rc = inject_fault ( NETDEV_DISCARD_RATE ) ) != 0 )
312  goto err_fault;
313 
314  /* Map for DMA, if required */
315  if ( netdev->dma && ( ! dma_mapped ( &iobuf->map ) ) ) {
316  if ( ( rc = iob_map_tx ( iobuf, netdev->dma ) ) != 0 )
317  goto err_map;
318  }
319 
320  /* Transmit packet */
321  if ( ( rc = netdev->op->transmit ( netdev, iobuf ) ) != 0 )
322  goto err_transmit;
323 
324  /* Clear in-progress flag */
326 
327  profile_stop ( &net_tx_profiler );
328  return 0;
329 
330  err_transmit:
331  err_map:
332  err_fault:
333  err_closed:
335  err_busy:
336  netdev_tx_complete_err ( netdev, iobuf, rc );
337  return rc;
338 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
#define EBUSY
Device or resource busy.
Definition: errno.h:338
struct dma_mapping map
DMA mapping.
Definition: iobuf.h:43
#define NETDEV_DISCARD_RATE
Definition: fault.h:15
unsigned int state
Current device state.
Definition: netdevice.h:395
struct dma_device * dma
DMA device.
Definition: netdevice.h:366
static void profile_stop(struct profiler *profiler)
Stop profiling.
Definition: profile.h:171
struct net_device_operations * op
Network device operations.
Definition: netdevice.h:369
static __always_inline int iob_map_tx(struct io_buffer *iobuf, struct dma_device *dma)
Map I/O buffer for transmit DMA.
Definition: iobuf.h:240
static int netdev_is_open(struct net_device *netdev)
Check whether or not network device is open.
Definition: netdevice.h:664
static __always_inline int dma_mapped(struct dma_mapping *map)
Check if DMA unmapping is required.
Definition: dma.h:449
#define list_add_tail(new, head)
Add a new entry to the tail of a list.
Definition: list.h:93
struct list_head tx_queue
TX packet queue.
Definition: netdevice.h:417
static struct net_device * netdev
Definition: gdbudp.c:52
static void profile_start(struct profiler *profiler)
Start profiling.
Definition: profile.h:158
static size_t iob_len(struct io_buffer *iobuf)
Calculate length of data in an I/O buffer.
Definition: iobuf.h:155
int(* transmit)(struct net_device *netdev, struct io_buffer *iobuf)
Transmit packet.
Definition: netdevice.h:254
#define NETDEV_TX_IN_PROGRESS
Network device transmission is in progress.
Definition: netdevice.h:455
void netdev_tx_complete_err(struct net_device *netdev, struct io_buffer *iobuf, int rc)
Complete network transmission.
Definition: netdevice.c:423
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362
struct list_head list
List of which this buffer is a member.
Definition: iobuf.h:40
#define DBGC2(...)
Definition: compiler.h:522
void * data
Start of data.
Definition: iobuf.h:48
#define ENETUNREACH
Network unreachable.
Definition: errno.h:488

References io_buffer::data, DBGC2, net_device::dma, dma_mapped(), EBUSY, ENETUNREACH, iob_len(), iob_map_tx(), io_buffer::list, list_add_tail, io_buffer::map, net_device::name, netdev, NETDEV_DISCARD_RATE, netdev_is_open(), netdev_tx_complete_err(), NETDEV_TX_IN_PROGRESS, net_device::op, profile_start(), profile_stop(), rc, net_device::state, net_device_operations::transmit, and net_device::tx_queue.

Referenced by efi_snp_transmit(), gdbudp_recv(), gdbudp_send(), net80211_handle_auth(), net80211_netdev_transmit(), net80211_tx_mgmt(), net_tx(), netdev_tx_complete_err(), and pxenv_undi_transmit().

◆ netdev_tx_defer()

void netdev_tx_defer ( struct net_device netdev,
struct io_buffer iobuf 
)

Defer transmitted packet.

Parameters
netdevNetwork device
iobufI/O buffer

Drivers may call netdev_tx_defer() if there is insufficient space in the transmit descriptor ring. Any packets deferred in this way will be automatically retransmitted as soon as space becomes available (i.e. as soon as the driver calls netdev_tx_complete()).

The packet must currently be in the network device's TX queue.

Drivers utilising netdev_tx_defer() must ensure that space in the transmit descriptor ring is freed up before calling netdev_tx_complete(). For example, if the ring is modelled using a producer counter and a consumer counter, then the consumer counter must be incremented before the call to netdev_tx_complete(). Failure to do this will cause the retransmitted packet to be immediately redeferred (which will result in out-of-order transmissions and other nastiness).

I/O buffers that have been mapped for DMA will remain mapped while present in the deferred transmit queue.

Definition at line 365 of file netdevice.c.

365  {
366 
367  /* Catch data corruption as early as possible */
368  list_check_contains_entry ( iobuf, &netdev->tx_queue, list );
369 
370  /* Remove from transmit queue */
371  list_del ( &iobuf->list );
372 
373  /* Add to deferred transmit queue */
374  list_add_tail ( &iobuf->list, &netdev->tx_deferred );
375 
376  /* Record "out of space" statistic */
378 }
void netdev_tx_err(struct net_device *netdev, struct io_buffer *iobuf, int rc)
Discard transmitted packet.
Definition: netdevice.c:393
#define list_del(list)
Delete an entry from a list.
Definition: list.h:119
#define list_add_tail(new, head)
Add a new entry to the tail of a list.
Definition: list.h:93
struct list_head tx_queue
TX packet queue.
Definition: netdevice.h:417
static struct net_device * netdev
Definition: gdbudp.c:52
struct list_head tx_deferred
Deferred TX packet queue.
Definition: netdevice.h:419
struct list_head list
List of which this buffer is a member.
Definition: iobuf.h:40
#define ENOBUFS
No buffer space available.
Definition: errno.h:498
#define list_check_contains_entry(entry, head, member)
Check list contains a specified entry.
Definition: list.h:522
#define NULL
NULL pointer (VOID *)
Definition: Base.h:321

References ENOBUFS, io_buffer::list, list_add_tail, list_check_contains_entry, list_del, netdev, netdev_tx_err(), NULL, net_device::tx_deferred, and net_device::tx_queue.

Referenced by nii_transmit(), realtek_transmit(), rndis_tx_defer(), and snpnet_transmit().

◆ netdev_tx_err()

void netdev_tx_err ( struct net_device netdev,
struct io_buffer iobuf,
int  rc 
)

Discard transmitted packet.

Parameters
netdevNetwork device
iobufI/O buffer, or NULL
rcPacket status code

The packet is discarded and a TX error is recorded. This function takes ownership of the I/O buffer.

The I/O buffer will be automatically unmapped for DMA, if applicable.

Definition at line 393 of file netdevice.c.

394  {
395 
396  /* Update statistics counter */
398  if ( rc == 0 ) {
399  DBGC2 ( netdev, "NETDEV %s transmission %p complete\n",
400  netdev->name, iobuf );
401  } else {
402  DBGC ( netdev, "NETDEV %s transmission %p failed: %s\n",
403  netdev->name, iobuf, strerror ( rc ) );
404  }
405 
406  /* Unmap I/O buffer, if required */
407  if ( iobuf && dma_mapped ( &iobuf->map ) )
408  iob_unmap ( iobuf );
409 
410  /* Discard packet */
411  free_iob ( iobuf );
412 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
struct dma_mapping map
DMA mapping.
Definition: iobuf.h:43
void free_iob(struct io_buffer *iobuf)
Free I/O buffer.
Definition: iobuf.c:146
#define DBGC(...)
Definition: compiler.h:505
static void netdev_record_stat(struct net_device_stats *stats, int rc)
Record network device statistic.
Definition: netdevice.c:244
struct net_device_stats tx_stats
TX statistics.
Definition: netdevice.h:423
static __always_inline int dma_mapped(struct dma_mapping *map)
Check if DMA unmapping is required.
Definition: dma.h:449
static __always_inline void iob_unmap(struct io_buffer *iobuf)
Unmap I/O buffer for DMA.
Definition: iobuf.h:275
static struct net_device * netdev
Definition: gdbudp.c:52
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362
#define DBGC2(...)
Definition: compiler.h:522

References DBGC, DBGC2, dma_mapped(), free_iob(), iob_unmap(), io_buffer::map, net_device::name, netdev, netdev_record_stat(), rc, strerror(), and net_device::tx_stats.

Referenced by eoib_duplicate(), intel_poll(), neighbour_destroy(), net_tx(), netdev_tx_complete_err(), netdev_tx_defer(), rdc_poll(), rhine_poll(), rndis_tx_complete_err(), snpnet_poll_tx(), vmxnet3_poll_events(), and vmxnet3_poll_tx().

◆ netdev_tx_complete_err()

void netdev_tx_complete_err ( struct net_device netdev,
struct io_buffer iobuf,
int  rc 
)

Complete network transmission.

Parameters
netdevNetwork device
iobufI/O buffer
rcPacket status code

The packet must currently be in the network device's TX queue.

Definition at line 423 of file netdevice.c.

424  {
425 
426  /* Catch data corruption as early as possible */
427  list_check_contains_entry ( iobuf, &netdev->tx_queue, list );
428 
429  /* Dequeue and free I/O buffer */
430  list_del ( &iobuf->list );
431  netdev_tx_err ( netdev, iobuf, rc );
432 
433  /* Handle pending transmit queue */
434  while ( ( iobuf = list_first_entry ( &netdev->tx_deferred,
435  struct io_buffer, list ) ) ) {
436 
437  /* Remove from pending transmit queue */
438  list_del ( &iobuf->list );
439 
440  /* When any transmit completion fails, cancel all
441  * pending transmissions.
442  */
443  if ( rc != 0 ) {
444  netdev_tx_err ( netdev, iobuf, -ECANCELED );
445  continue;
446  }
447 
448  /* Otherwise, attempt to transmit the first pending packet */
449  netdev_tx ( netdev, iobuf );
450  break;
451  }
452 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
void netdev_tx_err(struct net_device *netdev, struct io_buffer *iobuf, int rc)
Discard transmitted packet.
Definition: netdevice.c:393
#define ECANCELED
Operation canceled.
Definition: errno.h:343
#define list_first_entry(list, type, member)
Get the container of the first entry in a list.
Definition: list.h:333
#define list_del(list)
Delete an entry from a list.
Definition: list.h:119
struct list_head tx_queue
TX packet queue.
Definition: netdevice.h:417
static struct net_device * netdev
Definition: gdbudp.c:52
struct list_head tx_deferred
Deferred TX packet queue.
Definition: netdevice.h:419
int netdev_tx(struct net_device *netdev, struct io_buffer *iobuf)
Transmit raw packet via network device.
Definition: netdevice.c:287
struct list_head list
List of which this buffer is a member.
Definition: iobuf.h:40
#define list_check_contains_entry(entry, head, member)
Check list contains a specified entry.
Definition: list.h:522
A persistent I/O buffer.
Definition: iobuf.h:33

References ECANCELED, io_buffer::list, list_check_contains_entry, list_del, list_first_entry, netdev, netdev_tx(), netdev_tx_err(), rc, net_device::tx_deferred, and net_device::tx_queue.

Referenced by axge_out_complete(), dm96xx_out_complete(), ecm_out_complete(), eoib_complete_send(), flexboot_nodnic_eth_complete_send(), hermon_eth_complete_send(), ifec_tx_process(), iphone_out_complete(), ipoib_complete_send(), jme_free_tx_buffers(), jme_tx_clean(), ncm_out_complete(), net80211_tx_complete(), netdev_tx(), netdev_tx_complete(), netdev_tx_complete_next_err(), netfront_poll_tx(), nii_close(), phantom_close(), rndis_tx_complete_err(), sis190_process_tx(), smscusb_out_complete(), snpnet_close(), vmxnet3_flush_tx(), and vxge_xmit_compl().

◆ netdev_tx_complete_next_err()

void netdev_tx_complete_next_err ( struct net_device netdev,
int  rc 
)

Complete network transmission.

Parameters
netdevNetwork device
rcPacket status code

Completes the oldest outstanding packet in the TX queue.

Definition at line 462 of file netdevice.c.

462  {
463  struct io_buffer *iobuf;
464 
465  if ( ( iobuf = list_first_entry ( &netdev->tx_queue, struct io_buffer,
466  list ) ) != NULL ) {
467  netdev_tx_complete_err ( netdev, iobuf, rc );
468  }
469 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
#define list_first_entry(list, type, member)
Get the container of the first entry in a list.
Definition: list.h:333
struct list_head tx_queue
TX packet queue.
Definition: netdevice.h:417
static struct net_device * netdev
Definition: gdbudp.c:52
void netdev_tx_complete_err(struct net_device *netdev, struct io_buffer *iobuf, int rc)
Complete network transmission.
Definition: netdevice.c:423
struct list_head list
List of which this buffer is a member.
Definition: iobuf.h:40
#define NULL
NULL pointer (VOID *)
Definition: Base.h:321
A persistent I/O buffer.
Definition: iobuf.h:33

References io_buffer::list, list_first_entry, netdev, netdev_tx_complete_err(), NULL, rc, and net_device::tx_queue.

Referenced by myson_poll_tx(), natsemi_poll_tx(), netdev_tx_complete_next(), netdev_tx_flush(), rhine_poll_tx(), txnic_complete_sqe(), and velocity_poll_tx().

◆ netdev_tx_flush()

static void netdev_tx_flush ( struct net_device netdev)
static

Flush device's transmit queue.

Parameters
netdevNetwork device

Definition at line 476 of file netdevice.c.

476  {
477 
478  /* Discard any packets in the TX queue. This will also cause
479  * any packets in the deferred TX queue to be discarded
480  * automatically.
481  */
482  while ( ! list_empty ( &netdev->tx_queue ) ) {
484  }
485  assert ( list_empty ( &netdev->tx_queue ) );
487 }
void netdev_tx_complete_next_err(struct net_device *netdev, int rc)
Complete network transmission.
Definition: netdevice.c:462
#define ECANCELED
Operation canceled.
Definition: errno.h:343
#define list_empty(list)
Test whether a list is empty.
Definition: list.h:136
assert((readw(&hdr->flags) &(GTF_reading|GTF_writing))==0)
struct list_head tx_queue
TX packet queue.
Definition: netdevice.h:417
static struct net_device * netdev
Definition: gdbudp.c:52
struct list_head tx_deferred
Deferred TX packet queue.
Definition: netdevice.h:419

References assert(), ECANCELED, list_empty, netdev, netdev_tx_complete_next_err(), net_device::tx_deferred, and net_device::tx_queue.

Referenced by free_netdev(), and netdev_close().

◆ netdev_rx()

void netdev_rx ( struct net_device netdev,
struct io_buffer iobuf 
)

Add packet to receive queue.

Parameters
netdevNetwork device
iobufI/O buffer

The packet is added to the network device's RX queue. This function takes ownership of the I/O buffer.

The I/O buffer will be automatically unmapped for DMA, if applicable.

Definition at line 501 of file netdevice.c.

501  {
502  int rc;
503 
504  DBGC2 ( netdev, "NETDEV %s received %p (%p+%zx)\n",
505  netdev->name, iobuf, iobuf->data, iob_len ( iobuf ) );
506 
507  /* Discard packet (for test purposes) if applicable */
508  if ( ( rc = inject_fault ( NETDEV_DISCARD_RATE ) ) != 0 ) {
509  netdev_rx_err ( netdev, iobuf, rc );
510  return;
511  }
512 
513  /* Unmap I/O buffer, if required */
514  if ( dma_mapped ( &iobuf->map ) )
515  iob_unmap ( iobuf );
516 
517  /* Enqueue packet */
518  list_add_tail ( &iobuf->list, &netdev->rx_queue );
519 
520  /* Update statistics counter */
522 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
void netdev_rx_err(struct net_device *netdev, struct io_buffer *iobuf, int rc)
Discard received packet.
Definition: netdevice.c:539
struct dma_mapping map
DMA mapping.
Definition: iobuf.h:43
#define NETDEV_DISCARD_RATE
Definition: fault.h:15
static void netdev_record_stat(struct net_device_stats *stats, int rc)
Record network device statistic.
Definition: netdevice.c:244
struct list_head rx_queue
RX packet queue.
Definition: netdevice.h:421
static __always_inline int dma_mapped(struct dma_mapping *map)
Check if DMA unmapping is required.
Definition: dma.h:449
#define list_add_tail(new, head)
Add a new entry to the tail of a list.
Definition: list.h:93
static __always_inline void iob_unmap(struct io_buffer *iobuf)
Unmap I/O buffer for DMA.
Definition: iobuf.h:275
static struct net_device * netdev
Definition: gdbudp.c:52
struct net_device_stats rx_stats
RX statistics.
Definition: netdevice.h:425
static size_t iob_len(struct io_buffer *iobuf)
Calculate length of data in an I/O buffer.
Definition: iobuf.h:155
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362
struct list_head list
List of which this buffer is a member.
Definition: iobuf.h:40
#define DBGC2(...)
Definition: compiler.h:522
void * data
Start of data.
Definition: iobuf.h:48

References io_buffer::data, DBGC2, dma_mapped(), iob_len(), iob_unmap(), io_buffer::list, list_add_tail, io_buffer::map, net_device::name, netdev, NETDEV_DISCARD_RATE, netdev_record_stat(), netdev_rx_err(), rc, net_device::rx_queue, and net_device::rx_stats.

Referenced by a3c90x_process_rx_packets(), atl1e_clean_rx_irq(), axge_in_complete(), b44_process_rx_packets(), bnxt_rx_process(), dm96xx_in_complete(), ecm_in_complete(), efab_receive(), efx_hunt_receive(), ena_poll_rx(), eoib_complete_recv(), exanic_poll_rx(), flexboot_nodnic_eth_complete_recv(), icplus_poll_rx(), ifec_rx_process(), igbvf_process_rx_packets(), intel_poll_rx(), iphone_in_complete(), ipoib_complete_recv(), jme_alloc_and_feed_iob(), legacy_poll(), myri10ge_net_poll(), myson_poll_rx(), natsemi_poll_rx(), ncm_in_complete(), net80211_rx(), netfront_poll_rx(), nii_poll_rx(), nv_process_rx_packets(), pcnet32_process_rx_packets(), phantom_poll(), pnic_poll(), rdc_poll_rx(), realtek_legacy_poll_rx(), realtek_poll_rx(), rhine_poll_rx(), rndis_rx_data(), sis190_process_rx(), skge_rx_done(), sky2_status_intr(), smsc75xx_in_complete(), smsc95xx_in_complete(), snpnet_poll_rx(), tg3_rx_complete(), txnic_complete_rqe(), undinet_poll(), velocity_poll_rx(), virtnet_process_rx_packets(), vlan_netdev_rx(), vlan_rx(), vmxnet3_poll_rx(), and vxge_hw_vpath_poll_rx().

◆ netdev_rx_err()

void netdev_rx_err ( struct net_device netdev,
struct io_buffer iobuf,
int  rc 
)

Discard received packet.

Parameters
netdevNetwork device
iobufI/O buffer, or NULL
rcPacket status code

The packet is discarded and an RX error is recorded. This function takes ownership of the I/O buffer. iobuf may be NULL if, for example, the net device wishes to report an error due to being unable to allocate an I/O buffer.

The I/O buffer will be automatically unmapped for DMA, if applicable.

Definition at line 539 of file netdevice.c.

540  {
541 
542  DBGC ( netdev, "NETDEV %s failed to receive %p: %s\n",
543  netdev->name, iobuf, strerror ( rc ) );
544 
545  /* Unmap I/O buffer, if required */
546  if ( iobuf && dma_mapped ( &iobuf->map ) )
547  iob_unmap ( iobuf );
548 
549  /* Discard packet */
550  free_iob ( iobuf );
551 
552  /* Update statistics counter */
554 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
struct dma_mapping map
DMA mapping.
Definition: iobuf.h:43
void free_iob(struct io_buffer *iobuf)
Free I/O buffer.
Definition: iobuf.c:146
#define DBGC(...)
Definition: compiler.h:505
static void netdev_record_stat(struct net_device_stats *stats, int rc)
Record network device statistic.
Definition: netdevice.c:244
static __always_inline int dma_mapped(struct dma_mapping *map)
Check if DMA unmapping is required.
Definition: dma.h:449
static __always_inline void iob_unmap(struct io_buffer *iobuf)
Unmap I/O buffer for DMA.
Definition: iobuf.h:275
static struct net_device * netdev
Definition: gdbudp.c:52
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
struct net_device_stats rx_stats
RX statistics.
Definition: netdevice.h:425
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362

References DBGC, dma_mapped(), free_iob(), iob_unmap(), io_buffer::map, net_device::name, netdev, netdev_record_stat(), rc, net_device::rx_stats, and strerror().

Referenced by a3c90x_process_rx_packets(), atl1e_clean_rx_irq(), axge_in_complete(), axge_intr_complete(), axge_poll(), b44_process_rx_packets(), bnxt_rx_process(), dm96xx_in_complete(), dm96xx_intr_complete(), dm96xx_poll(), ecm_in_complete(), ecm_intr_complete(), ecm_poll(), efx_hunt_receive(), eoib_complete_recv(), exanic_close(), exanic_poll_rx(), flexboot_nodnic_eth_complete_recv(), icplus_poll_rx(), ifec_rx_process(), igbvf_process_rx_packets(), intel_poll(), intel_poll_rx(), intelx_poll(), intelxvf_poll(), iphone_in_complete(), iphone_poll(), ipoib_complete_recv(), jme_process_receive(), myson_poll_rx(), myson_refill_rx(), natsemi_poll_rx(), natsemi_refill_rx(), ncm_in_complete(), ncm_intr_complete(), ncm_poll(), net80211_rx(), net80211_rx_err(), net_poll(), netdev_rx(), netdev_rx_flush(), netfront_poll_rx(), netfront_refill_rx(), nii_poll_rx(), nv_process_rx_packets(), pcnet32_process_rx_packets(), phantom_refill_rx_ring(), pnic_poll(), rdc_poll_rx(), realtek_legacy_poll_rx(), realtek_poll_rx(), rhine_poll(), rhine_poll_rx(), rndis_rx(), rndis_rx_data(), rndis_rx_err(), rndis_rx_message(), rndis_rx_status(), skge_rx_done(), sky2_receive(), sky2_status_intr(), smsc75xx_in_complete(), smsc75xx_poll(), smsc95xx_in_complete(), smsc95xx_poll(), smscusb_intr_complete(), snpnet_poll_rx(), snpnet_poll_tx(), tg3_rx_complete(), txnic_complete_rqe(), undinet_poll(), velocity_poll_rx(), vlan_netdev_rx(), vlan_netdev_rx_err(), vmxnet3_flush_rx(), vmxnet3_poll_events(), vmxnet3_poll_rx(), and vxge_hw_vpath_poll_rx().

◆ netdev_poll()

void netdev_poll ( struct net_device netdev)

Poll for completed and received packets on network device.

Parameters
netdevNetwork device

Polls the network device for completed transmissions and received packets. Any received packets will be added to the RX packet queue via netdev_rx().

Definition at line 565 of file netdevice.c.

565  {
566 
567  /* Avoid calling poll() on unopened network devices */
568  if ( ! netdev_is_open ( netdev ) )
569  return;
570 
571  /* Guard against re-entry */
573  return;
574 
575  /* Poll device */
577  netdev->op->poll ( netdev );
579 }
unsigned int state
Current device state.
Definition: netdevice.h:395
struct net_device_operations * op
Network device operations.
Definition: netdevice.h:369
void(* poll)(struct net_device *netdev)
Poll for completed and received packets.
Definition: netdevice.h:267
static int netdev_is_open(struct net_device *netdev)
Check whether or not network device is open.
Definition: netdevice.h:664
static struct net_device * netdev
Definition: gdbudp.c:52
#define NETDEV_POLL_IN_PROGRESS
Network device poll is in progress.
Definition: netdevice.h:458

References netdev, netdev_is_open(), NETDEV_POLL_IN_PROGRESS, net_device::op, net_device_operations::poll, and net_device::state.

Referenced by efi_snp_poll(), gdbudp_recv(), iflinkwait(), net_poll(), and vlan_poll().

◆ netdev_rx_dequeue()

struct io_buffer* netdev_rx_dequeue ( struct net_device netdev)

Remove packet from device's receive queue.

Parameters
netdevNetwork device
Return values
iobufI/O buffer, or NULL

Removes the first packet from the device's RX queue and returns it. Ownership of the packet is transferred to the caller.

Definition at line 590 of file netdevice.c.

590  {
591  struct io_buffer *iobuf;
592 
593  iobuf = list_first_entry ( &netdev->rx_queue, struct io_buffer, list );
594  if ( ! iobuf )
595  return NULL;
596 
597  list_del ( &iobuf->list );
598  return iobuf;
599 }
struct list_head rx_queue
RX packet queue.
Definition: netdevice.h:421
#define list_first_entry(list, type, member)
Get the container of the first entry in a list.
Definition: list.h:333
#define list_del(list)
Delete an entry from a list.
Definition: list.h:119
static struct net_device * netdev
Definition: gdbudp.c:52
struct list_head list
List of which this buffer is a member.
Definition: iobuf.h:40
#define NULL
NULL pointer (VOID *)
Definition: Base.h:321
A persistent I/O buffer.
Definition: iobuf.h:33

References io_buffer::list, list_del, list_first_entry, netdev, NULL, and net_device::rx_queue.

Referenced by efi_snp_poll(), gdbudp_recv(), net_poll(), netdev_rx_flush(), and pxenv_undi_isr().

◆ netdev_rx_flush()

static void netdev_rx_flush ( struct net_device netdev)
static

Flush device's receive queue.

Parameters
netdevNetwork device

Definition at line 606 of file netdevice.c.

606  {
607  struct io_buffer *iobuf;
608 
609  /* Discard any packets in the RX queue */
610  while ( ( iobuf = netdev_rx_dequeue ( netdev ) ) ) {
611  netdev_rx_err ( netdev, iobuf, -ECANCELED );
612  }
613 }
void netdev_rx_err(struct net_device *netdev, struct io_buffer *iobuf, int rc)
Discard received packet.
Definition: netdevice.c:539
#define ECANCELED
Operation canceled.
Definition: errno.h:343
static struct net_device * netdev
Definition: gdbudp.c:52
struct io_buffer * netdev_rx_dequeue(struct net_device *netdev)
Remove packet from device's receive queue.
Definition: netdevice.c:590
A persistent I/O buffer.
Definition: iobuf.h:33

References ECANCELED, netdev, netdev_rx_dequeue(), and netdev_rx_err().

Referenced by free_netdev(), and netdev_close().

◆ netdev_config_close()

static void netdev_config_close ( struct net_device_configuration config,
int  rc 
)
static

Finish network device configuration.

Parameters
configNetwork device configuration
rcReason for completion

Definition at line 621 of file netdevice.c.

622  {
623  struct net_device_configurator *configurator = config->configurator;
624  struct net_device *netdev = config->netdev;
625 
626  /* Restart interface */
627  intf_restart ( &config->job, rc );
628 
629  /* Record configuration result */
630  config->rc = rc;
631  if ( rc == 0 ) {
632  DBGC ( netdev, "NETDEV %s configured via %s\n",
633  netdev->name, configurator->name );
634  } else {
635  DBGC ( netdev, "NETDEV %s configuration via %s failed: %s\n",
636  netdev->name, configurator->name, strerror ( rc ) );
637  }
638 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
const char * name
Name.
Definition: netdevice.h:315
void intf_restart(struct interface *intf, int rc)
Shut down and restart an object interface.
Definition: interface.c:342
struct interface job
Job control interface.
Definition: netdevice.h:309
#define DBGC(...)
Definition: compiler.h:505
static struct net_device * netdev
Definition: gdbudp.c:52
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
A network device.
Definition: netdevice.h:352
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362
struct net_device * netdev
Network device.
Definition: netdevice.h:303
int rc
Configuration status.
Definition: netdevice.h:307
A network device configurator.
Definition: netdevice.h:313
struct net_device_configurator * configurator
Network device configurator.
Definition: netdevice.h:305

References net_device_configuration::configurator, DBGC, intf_restart(), net_device_configuration::job, net_device_configurator::name, net_device::name, netdev, net_device_configuration::netdev, net_device_configuration::rc, rc, and strerror().

◆ free_netdev()

static void free_netdev ( struct refcnt refcnt)
static

Free network device.

Parameters
refcntNetwork device reference counter

Definition at line 655 of file netdevice.c.

655  {
656  struct net_device *netdev =
657  container_of ( refcnt, struct net_device, refcnt );
658 
663  free ( netdev );
664 }
struct retry_timer link_block
Link block timer.
Definition: netdevice.h:403
static struct settings * netdev_settings(struct net_device *netdev)
Get per-netdevice configuration settings block.
Definition: netdevice.h:589
A reference counter.
Definition: refcnt.h:26
#define container_of(ptr, type, field)
Get containing structure.
Definition: stddef.h:35
static struct net_device * netdev
Definition: gdbudp.c:52
static void netdev_rx_flush(struct net_device *netdev)
Flush device's receive queue.
Definition: netdevice.c:606
static void(* free)(struct refcnt *refcnt))
Definition: refcnt.h:54
A network device.
Definition: netdevice.h:352
void stop_timer(struct retry_timer *timer)
Stop timer.
Definition: retry.c:117
void clear_settings(struct settings *settings)
Clear settings block.
Definition: settings.c:1102
static void netdev_tx_flush(struct net_device *netdev)
Flush device's transmit queue.
Definition: netdevice.c:476

References clear_settings(), container_of, free, net_device::link_block, netdev, netdev_rx_flush(), netdev_settings(), netdev_tx_flush(), and stop_timer().

Referenced by alloc_netdev().

◆ alloc_netdev()

struct net_device* alloc_netdev ( size_t  priv_len)

Allocate network device.

Parameters
priv_lenLength of private data area (net_device::priv)
Return values
netdevNetwork device, or NULL

Allocates space for a network device and its private data area.

Definition at line 674 of file netdevice.c.

674  {
675  struct net_device *netdev;
676  struct net_device_configurator *configurator;
677  struct net_device_configuration *config;
678  unsigned int num_configs;
679  size_t confs_len;
680  size_t total_len;
681 
683  confs_len = ( num_configs * sizeof ( netdev->configs[0] ) );
684  total_len = ( sizeof ( *netdev ) + confs_len + priv_len );
685  netdev = zalloc ( total_len );
686  if ( netdev ) {
690  &netdev->refcnt );
695  config = netdev->configs;
697  config->netdev = netdev;
698  config->configurator = configurator;
699  config->rc = -EUNUSED_CONFIG;
700  intf_init ( &config->job, &netdev_config_desc,
701  &netdev->refcnt );
702  config++;
703  }
704  netdev->priv = ( ( ( void * ) netdev ) + sizeof ( *netdev ) +
705  confs_len );
706  }
707  return netdev;
708 }
static void netdev_settings_init(struct net_device *netdev)
Initialise a per-netdevice configuration settings block.
Definition: netdevice.h:601
#define EUNKNOWN_LINK_STATUS
Default unknown link status code.
Definition: netdevice.c:68
struct interface job
Job control interface.
Definition: netdevice.h:309
#define ref_init(refcnt, free)
Initialise a reference counter.
Definition: refcnt.h:64
struct retry_timer link_block
Link block timer.
Definition: netdevice.h:403
struct list_head rx_queue
RX packet queue.
Definition: netdevice.h:421
#define EUNUSED_CONFIG
Default not-yet-attempted-configuration status code.
Definition: netdevice.c:73
int link_rc
Link status code.
Definition: netdevice.h:401
void * priv
Driver private data.
Definition: netdevice.h:431
struct list_head tx_queue
TX packet queue.
Definition: netdevice.h:417
struct net_device_configuration configs[0]
Network device configurations (variable length)
Definition: netdevice.h:434
static struct net_device * netdev
Definition: gdbudp.c:52
struct list_head tx_deferred
Deferred TX packet queue.
Definition: netdevice.h:419
static struct interface_descriptor netdev_config_desc
Network device configuration interface descriptor.
Definition: netdevice.c:647
struct refcnt refcnt
Reference counter.
Definition: netdevice.h:354
void * zalloc(size_t size)
Allocate cleared memory.
Definition: malloc.c:624
#define for_each_table_entry(pointer, table)
Iterate through all entries within a linker table.
Definition: tables.h:385
A network device.
Definition: netdevice.h:352
static void netdev_link_block_expired(struct retry_timer *timer, int fail __unused)
Handle network device link block timer expiry.
Definition: netdevice.c:229
#define INIT_LIST_HEAD(list)
Initialise a list head.
Definition: list.h:45
struct net_device * netdev
Network device.
Definition: netdevice.h:303
int rc
Configuration status.
Definition: netdevice.h:307
A network device configurator.
Definition: netdevice.h:313
struct net_device_configurator * configurator
Network device configurator.
Definition: netdevice.h:305
static void free_netdev(struct refcnt *refcnt)
Free network device.
Definition: netdevice.c:655
#define NET_DEVICE_CONFIGURATORS
Network device configurator table.
Definition: netdevice.h:332
A network device configuration.
Definition: netdevice.h:301
static void intf_init(struct interface *intf, struct interface_descriptor *desc, struct refcnt *refcnt)
Initialise an object interface.
Definition: interface.h:190
#define table_num_entries(table)
Get number of entries in linker table.
Definition: tables.h:335

References net_device::configs, net_device_configuration::configurator, EUNKNOWN_LINK_STATUS, EUNUSED_CONFIG, for_each_table_entry, free_netdev(), INIT_LIST_HEAD, intf_init(), net_device_configuration::job, net_device::link_block, net_device::link_rc, NET_DEVICE_CONFIGURATORS, netdev, net_device_configuration::netdev, netdev_config_desc, netdev_link_block_expired(), netdev_settings_init(), net_device::priv, net_device_configuration::rc, ref_init, net_device::refcnt, net_device::rx_queue, table_num_entries, net_device::tx_deferred, net_device::tx_queue, and zalloc().

Referenced by alloc_etherdev(), alloc_ipoibdev(), net80211_alloc(), and nii_start().

◆ register_netdev()

int register_netdev ( struct net_device netdev)

Register network device.

Parameters
netdevNetwork device
Return values
rcReturn status code

Gives the network device a name and adds it to the list of network devices.

Definition at line 719 of file netdevice.c.

719  {
721  struct net_driver *driver;
722  struct net_device *duplicate;
723  unsigned int i;
724  uint32_t seed;
725  int rc;
726 
727  /* Set initial link-layer address, if not already set */
728  if ( ! netdev_has_ll_addr ( netdev ) ) {
730  }
731 
732  /* Set MTU, if not already set */
733  if ( ! netdev->mtu ) {
734  netdev->mtu = ( netdev->max_pkt_len -
736  }
737 
738  /* Reject named network devices that already exist */
739  if ( netdev->name[0] && ( duplicate = find_netdev ( netdev->name ) ) ) {
740  DBGC ( netdev, "NETDEV rejecting duplicate name %s\n",
741  duplicate->name );
742  rc = -EEXIST;
743  goto err_duplicate;
744  }
745 
746  /* Assign a unique device name, if not already set */
747  if ( netdev->name[0] == '\0' ) {
748  for ( i = 0 ; ; i++ ) {
749  snprintf ( netdev->name, sizeof ( netdev->name ),
750  "net%d", i );
751  if ( find_netdev ( netdev->name ) == NULL )
752  break;
753  }
754  }
755 
756  /* Assign a unique non-zero scope ID */
757  for ( netdev->scope_id = 1 ; ; netdev->scope_id++ ) {
759  break;
760  }
761 
762  /* Use least significant bits of the link-layer address to
763  * improve the randomness of the (non-cryptographic) random
764  * number generator.
765  */
767  - sizeof ( seed ) ), sizeof ( seed ) );
768  srand ( rand() ^ seed );
769 
770  /* Add to device list */
771  netdev_get ( netdev );
773  DBGC ( netdev, "NETDEV %s registered (phys %s hwaddr %s)\n",
774  netdev->name, netdev->dev->name,
775  netdev_addr ( netdev ) );
776 
777  /* Register per-netdev configuration settings */
779  NULL, netdev->name ) ) != 0 ) {
780  DBGC ( netdev, "NETDEV %s could not register settings: %s\n",
781  netdev->name, strerror ( rc ) );
782  goto err_register_settings;
783  }
784 
785  /* Probe device */
786  for_each_table_entry ( driver, NET_DRIVERS ) {
787  if ( driver->probe && ( rc = driver->probe ( netdev ) ) != 0 ) {
788  DBGC ( netdev, "NETDEV %s could not add %s device: "
789  "%s\n", netdev->name, driver->name,
790  strerror ( rc ) );
791  goto err_probe;
792  }
793  }
794 
795  return 0;
796 
797  err_probe:
799  if ( driver->remove )
800  driver->remove ( netdev );
801  }
804  err_register_settings:
805  list_del ( &netdev->list );
806  netdev_put ( netdev );
807  err_duplicate:
808  return rc;
809 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
uint8_t ll_header_len
Link-layer header length.
Definition: netdevice.h:200
uint8_t ll_addr_len
Link-layer address length.
Definition: netdevice.h:198
void unregister_settings(struct settings *settings)
Unregister settings block.
Definition: settings.c:514
#define EEXIST
File exists.
Definition: errno.h:388
size_t mtu
Maximum transmission unit length.
Definition: netdevice.h:415
struct list_head list
List of network devices.
Definition: netdevice.h:356
#define DBGC(...)
Definition: compiler.h:505
char name[40]
Name.
Definition: device.h:75
static const char * netdev_addr(struct net_device *netdev)
Get printable network device link-layer address.
Definition: netdevice.h:533
unsigned int scope_id
Scope ID.
Definition: netdevice.h:360
void(* init_addr)(const void *hw_addr, void *ll_addr)
Initialise link-layer address.
Definition: netdevice.h:150
A network upper-layer driver.
Definition: netdevice.h:473
static struct settings * netdev_settings(struct net_device *netdev)
Get per-netdevice configuration settings block.
Definition: netdevice.h:589
A link-layer protocol.
Definition: netdevice.h:114
#define list_del(list)
Delete an entry from a list.
Definition: list.h:119
void * memcpy(void *dest, const void *src, size_t len) __nonnull
const char * name
Name.
Definition: netdevice.h:475
static void netdev_put(struct net_device *netdev)
Drop reference to network device.
Definition: netdevice.h:567
static int rand(void)
Definition: stdlib.h:59
static void srand(unsigned int seed)
Definition: stdlib.h:63
void(* remove)(struct net_device *netdev)
Remove device.
Definition: netdevice.h:491
#define list_add_tail(new, head)
Add a new entry to the tail of a list.
Definition: list.h:93
static struct net_device * netdev
Definition: gdbudp.c:52
#define NET_DRIVERS
Network driver table.
Definition: netdevice.h:495
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
#define for_each_table_entry(pointer, table)
Iterate through all entries within a linker table.
Definition: tables.h:385
A network device.
Definition: netdevice.h:352
static struct net_device * netdev_get(struct net_device *netdev)
Get reference to network device.
Definition: netdevice.h:556
unsigned int uint32_t
Definition: stdint.h:12
struct net_device * find_netdev_by_scope_id(unsigned int scope_id)
Get network device by scope ID.
Definition: netdevice.c:961
static int netdev_has_ll_addr(struct net_device *netdev)
Check whether or not network device has a link-layer address.
Definition: netdevice.c:101
struct device * dev
Underlying hardware device.
Definition: netdevice.h:364
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362
struct net_device * find_netdev(const char *name)
Get network device by name.
Definition: netdevice.c:939
int snprintf(char *buf, size_t size, const char *fmt,...)
Write a formatted string to a buffer.
Definition: vsprintf.c:382
int register_settings(struct settings *settings, struct settings *parent, const char *name)
Register settings block.
Definition: settings.c:475
void clear_settings(struct settings *settings)
Clear settings block.
Definition: settings.c:1102
struct list_head net_devices
List of network devices.
Definition: netdevice.c:53
int(* probe)(struct net_device *netdev)
Probe device.
Definition: netdevice.h:481
uint8_t ll_addr[MAX_LL_ADDR_LEN]
Link-layer address.
Definition: netdevice.h:387
size_t max_pkt_len
Maximum packet length.
Definition: netdevice.h:409
#define for_each_table_entry_continue_reverse(pointer, table)
Iterate through all remaining entries within a linker table in reverse order.
Definition: tables.h:469
uint8_t hw_addr[MAX_HW_ADDR_LEN]
Hardware address.
Definition: netdevice.h:381
#define NULL
NULL pointer (VOID *)
Definition: Base.h:321
struct ll_protocol * ll_protocol
Link-layer protocol.
Definition: netdevice.h:372

References clear_settings(), DBGC, net_device::dev, EEXIST, find_netdev(), find_netdev_by_scope_id(), for_each_table_entry, for_each_table_entry_continue_reverse, net_device::hw_addr, ll_protocol::init_addr, net_device::list, list_add_tail, list_del, net_device::ll_addr, ll_protocol::ll_addr_len, ll_protocol::ll_header_len, net_device::ll_protocol, net_device::max_pkt_len, memcpy(), net_device::mtu, device::name, net_device::name, net_driver::name, net_devices, NET_DRIVERS, netdev, netdev_addr(), netdev_get(), netdev_has_ll_addr(), netdev_put(), netdev_settings(), NULL, net_driver::probe, rand(), rc, register_settings(), net_driver::remove, net_device::scope_id, snprintf(), srand(), strerror(), and unregister_settings().

Referenced by a3c90x_probe(), atl1e_probe(), axge_probe(), b44_probe(), bnxt_init_one(), dm96xx_probe(), ecm_probe(), efab_probe(), ena_probe(), eoib_create(), exanic_probe_port(), flexboot_nodnic_register_netdev(), forcedeth_probe(), hermon_register_netdev(), hunt_probe(), ice_probe(), icplus_probe(), ifec_pci_probe(), igbvf_probe(), intel_probe(), intelx_probe(), intelxl_probe(), intelxlvf_probe(), intelxvf_probe(), iphone_probe(), ipoib_probe(), jme_probe(), lan78xx_probe(), legacy_probe(), myri10ge_pci_probe(), myson_probe(), natsemi_probe(), ncm_probe(), net80211_register(), netfront_probe(), nii_start(), pcnet32_probe(), phantom_probe(), pnic_probe(), rdc_probe(), realtek_probe(), register_rndis(), rhine_probe(), sis190_probe(), skeleton_probe(), skge_probe(), sky2_probe(), smsc75xx_probe(), smsc95xx_probe(), snpnet_start(), tg3_init_one(), txnic_lmac_probe(), undinet_probe(), velocity_probe(), virtnet_probe_legacy(), virtnet_probe_modern(), vlan_create(), vmxnet3_probe(), and vxge_device_register().

◆ netdev_open()

int netdev_open ( struct net_device netdev)

Open network device.

Parameters
netdevNetwork device
Return values
rcReturn status code

Definition at line 817 of file netdevice.c.

817  {
818  int rc;
819 
820  /* Do nothing if device is already open */
821  if ( netdev->state & NETDEV_OPEN )
822  return 0;
823 
824  DBGC ( netdev, "NETDEV %s opening\n", netdev->name );
825 
826  /* Mark as opened */
828 
829  /* Open the device */
830  if ( ( rc = netdev->op->open ( netdev ) ) != 0 )
831  goto err;
832 
833  /* Add to head of open devices list */
835 
836  /* Notify drivers of device state change */
837  netdev_notify ( netdev );
838 
839  return 0;
840 
841  err:
842  netdev->state &= ~NETDEV_OPEN;
843  return rc;
844 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
int(* open)(struct net_device *netdev)
Open network device.
Definition: netdevice.h:222
#define list_add(new, head)
Add a new entry to the head of a list.
Definition: list.h:69
#define NETDEV_OPEN
Network device is open.
Definition: netdevice.h:438
#define DBGC(...)
Definition: compiler.h:505
unsigned int state
Current device state.
Definition: netdevice.h:395
struct net_device_operations * op
Network device operations.
Definition: netdevice.h:369
static struct net_device * netdev
Definition: gdbudp.c:52
static struct list_head open_net_devices
List of open network devices, in reverse order of opening.
Definition: netdevice.c:56
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362
struct list_head open_list
List of open network devices.
Definition: netdevice.h:358
static void netdev_notify(struct net_device *netdev)
Notify drivers of network device or link state change.
Definition: netdevice.c:117

References DBGC, list_add, net_device::name, netdev, netdev_notify(), NETDEV_OPEN, net_device::op, net_device_operations::open, net_device::open_list, open_net_devices, rc, and net_device::state.

Referenced by apply_netdev_settings(), efi_snp_initialize(), efi_snp_reset(), gdbudp_ensure_netdev_open(), ifopen(), iwlist(), netvsc_reset(), pxe_exec(), pxe_netdev_open(), pxenv_udp_open(), vlan_open(), vlan_sync(), and xve_open().

◆ netdev_close()

void netdev_close ( struct net_device netdev)

Close network device.

Parameters
netdevNetwork device

Definition at line 851 of file netdevice.c.

851  {
852  unsigned int num_configs;
853  unsigned int i;
854 
855  /* Do nothing if device is already closed */
856  if ( ! ( netdev->state & NETDEV_OPEN ) )
857  return;
858 
859  DBGC ( netdev, "NETDEV %s closing\n", netdev->name );
860 
861  /* Terminate any ongoing configurations. Use intf_close()
862  * rather than intf_restart() to allow the cancellation to be
863  * reported back to us if a configuration is actually in
864  * progress.
865  */
867  for ( i = 0 ; i < num_configs ; i++ )
869 
870  /* Remove from open devices list */
871  list_del ( &netdev->open_list );
872 
873  /* Mark as closed */
874  netdev->state &= ~NETDEV_OPEN;
875 
876  /* Notify drivers of device state change */
877  netdev_notify ( netdev );
878 
879  /* Close the device */
880  netdev->op->close ( netdev );
881 
882  /* Flush TX and RX queues */
885 }
void intf_close(struct interface *intf, int rc)
Close an object interface.
Definition: interface.c:249
#define NETDEV_OPEN
Network device is open.
Definition: netdevice.h:438
struct interface job
Job control interface.
Definition: netdevice.h:309
#define DBGC(...)
Definition: compiler.h:505
unsigned int state
Current device state.
Definition: netdevice.h:395
struct net_device_operations * op
Network device operations.
Definition: netdevice.h:369
#define ECANCELED
Operation canceled.
Definition: errno.h:343
#define list_del(list)
Delete an entry from a list.
Definition: list.h:119
struct net_device_configuration configs[0]
Network device configurations (variable length)
Definition: netdevice.h:434
static struct net_device * netdev
Definition: gdbudp.c:52
static void netdev_rx_flush(struct net_device *netdev)
Flush device's receive queue.
Definition: netdevice.c:606
void(* close)(struct net_device *netdev)
Close network device.
Definition: netdevice.h:230
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362
struct list_head open_list
List of open network devices.
Definition: netdevice.h:358
#define NET_DEVICE_CONFIGURATORS
Network device configurator table.
Definition: netdevice.h:332
static void netdev_tx_flush(struct net_device *netdev)
Flush device's transmit queue.
Definition: netdevice.c:476
static void netdev_notify(struct net_device *netdev)
Notify drivers of network device or link state change.
Definition: netdevice.c:117
#define table_num_entries(table)
Get number of entries in linker table.
Definition: tables.h:335

References net_device_operations::close, net_device::configs, DBGC, ECANCELED, intf_close(), net_device_configuration::job, list_del, net_device::name, NET_DEVICE_CONFIGURATORS, netdev, netdev_notify(), NETDEV_OPEN, netdev_rx_flush(), netdev_tx_flush(), net_device::op, net_device::open_list, net_device::state, and table_num_entries.

Referenced by apply_netdev_settings(), efi_snp_reset(), efi_snp_shutdown(), ifclose(), ifconf_payload(), iflinkwait_payload(), iwlist(), netvsc_reset(), pxe_netdev_close(), unregister_netdev(), vlan_close(), vlan_sync(), and xve_close().

◆ unregister_netdev()

void unregister_netdev ( struct net_device netdev)

Unregister network device.

Parameters
netdevNetwork device

Removes the network device from the list of network devices.

Definition at line 894 of file netdevice.c.

894  {
895  struct net_driver *driver;
896 
897  /* Ensure device is closed */
898  netdev_close ( netdev );
899 
900  /* Remove device */
902  if ( driver->remove )
903  driver->remove ( netdev );
904  }
905 
906  /* Unregister per-netdev configuration settings */
909 
910  /* Remove from device list */
911  DBGC ( netdev, "NETDEV %s unregistered\n", netdev->name );
912  list_del ( &netdev->list );
913  netdev_put ( netdev );
914 }
void unregister_settings(struct settings *settings)
Unregister settings block.
Definition: settings.c:514
struct list_head list
List of network devices.
Definition: netdevice.h:356
#define DBGC(...)
Definition: compiler.h:505
#define for_each_table_entry_reverse(pointer, table)
Iterate through all entries within a linker table in reverse order.
Definition: tables.h:440
A network upper-layer driver.
Definition: netdevice.h:473
static struct settings * netdev_settings(struct net_device *netdev)
Get per-netdevice configuration settings block.
Definition: netdevice.h:589
#define list_del(list)
Delete an entry from a list.
Definition: list.h:119
static void netdev_put(struct net_device *netdev)
Drop reference to network device.
Definition: netdevice.h:567
void(* remove)(struct net_device *netdev)
Remove device.
Definition: netdevice.h:491
static struct net_device * netdev
Definition: gdbudp.c:52
#define NET_DRIVERS
Network driver table.
Definition: netdevice.h:495
void netdev_close(struct net_device *netdev)
Close network device.
Definition: netdevice.c:851
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362
void clear_settings(struct settings *settings)
Clear settings block.
Definition: settings.c:1102

References clear_settings(), DBGC, for_each_table_entry_reverse, net_device::list, list_del, net_device::name, NET_DRIVERS, netdev, netdev_close(), netdev_put(), netdev_settings(), net_driver::remove, and unregister_settings().

Referenced by a3c90x_remove(), atl1e_remove(), axge_probe(), axge_remove(), b44_remove(), bnxt_remove_one(), dm96xx_probe(), dm96xx_remove(), ecm_probe(), ecm_remove(), efab_probe(), efab_remove(), ena_probe(), ena_remove(), eoib_create(), eoib_destroy(), exanic_probe_port(), exanic_remove_port(), flexboot_nodnic_unregister_netdev(), forcedeth_remove(), hermon_register_netdev(), hermon_unregister_netdev(), hunt_remove(), ice_probe(), ice_remove(), icplus_probe(), icplus_remove(), ifec_pci_remove(), igbvf_remove(), intel_probe(), intel_remove(), intelx_probe(), intelx_remove(), intelxl_probe(), intelxl_remove(), intelxlvf_probe(), intelxlvf_remove(), intelxvf_probe(), intelxvf_remove(), iphone_probe(), iphone_remove(), ipoib_probe(), ipoib_remove(), jme_remove(), lan78xx_probe(), lan78xx_remove(), legacy_remove(), myri10ge_pci_probe(), myri10ge_pci_remove(), myson_probe(), myson_remove(), natsemi_probe(), natsemi_remove(), ncm_probe(), ncm_remove(), net80211_unregister(), netfront_probe(), netfront_remove(), nii_start(), nii_stop(), pcnet32_remove(), phantom_probe(), phantom_remove(), pnic_remove(), rdc_probe(), rdc_remove(), realtek_probe(), realtek_remove(), register_rndis(), rhine_remove(), sis190_remove(), skeleton_probe(), skeleton_remove(), skge_remove(), sky2_remove(), smsc75xx_probe(), smsc75xx_remove(), smsc95xx_probe(), smsc95xx_remove(), snpnet_start(), snpnet_stop(), tg3_remove_one(), txnic_lmac_probe(), txnic_lmac_remove(), undinet_remove(), unregister_rndis(), velocity_remove(), virtnet_probe_legacy(), virtnet_probe_modern(), virtnet_remove(), vlan_create(), vlan_destroy(), vmxnet3_probe(), vmxnet3_remove(), and vxge_device_unregister().

◆ netdev_irq()

void netdev_irq ( struct net_device netdev,
int  enable 
)

Enable or disable interrupts.

Parameters
netdevNetwork device
enableInterrupts should be enabled

Definition at line 921 of file netdevice.c.

921  {
922 
923  /* Enable or disable device interrupts, if applicable */
924  if ( netdev_irq_supported ( netdev ) )
925  netdev->op->irq ( netdev, enable );
926 
927  /* Record interrupt enabled state */
929  if ( enable )
931 }
unsigned int state
Current device state.
Definition: netdevice.h:395
struct net_device_operations * op
Network device operations.
Definition: netdevice.h:369
void(* irq)(struct net_device *netdev, int enable)
Enable or disable interrupts.
Definition: netdevice.h:276
static struct net_device * netdev
Definition: gdbudp.c:52
static int netdev_irq_supported(struct net_device *netdev)
Check whether or not network device supports interrupts.
Definition: netdevice.h:675
#define NETDEV_IRQ_ENABLED
Network device interrupts are enabled.
Definition: netdevice.h:441

References net_device_operations::irq, netdev, NETDEV_IRQ_ENABLED, netdev_irq_supported(), net_device::op, and net_device::state.

Referenced by pxe_netdev_close(), pxe_netdev_open(), pxenv_undi_isr(), pxenv_undi_transmit(), virtnet_open_legacy(), virtnet_open_modern(), and vlan_irq().

◆ find_netdev()

struct net_device* find_netdev ( const char *  name)

Get network device by name.

Parameters
nameNetwork device name
Return values
netdevNetwork device, or NULL

Definition at line 939 of file netdevice.c.

939  {
940  struct net_device *netdev;
941 
942  /* Allow "netX" shortcut */
943  if ( strcmp ( name, "netX" ) == 0 )
944  return last_opened_netdev();
945 
946  /* Identify network device by name */
948  if ( strcmp ( netdev->name, name ) == 0 )
949  return netdev;
950  }
951 
952  return NULL;
953 }
const char * name
Definition: ath9k_hw.c:1984
struct list_head list
List of network devices.
Definition: netdevice.h:356
#define list_for_each_entry(pos, head, member)
Iterate over entries in a list.
Definition: list.h:420
static struct net_device * netdev
Definition: gdbudp.c:52
struct net_device * last_opened_netdev(void)
Get most recently opened network device.
Definition: netdevice.c:998
A network device.
Definition: netdevice.h:352
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362
int strcmp(const char *first, const char *second)
Compare strings.
Definition: string.c:173
struct list_head net_devices
List of network devices.
Definition: netdevice.c:53
#define NULL
NULL pointer (VOID *)
Definition: Base.h:321

References last_opened_netdev(), net_device::list, list_for_each_entry, net_device::name, name, net_devices, netdev, NULL, and strcmp().

Referenced by gdbudp_configure(), ipv6_sock_aton(), netdev_redirect(), parse_netdev(), and register_netdev().

◆ find_netdev_by_scope_id()

struct net_device* find_netdev_by_scope_id ( unsigned int  scope_id)

Get network device by scope ID.

Parameters
indexNetwork device index
Return values
netdevNetwork device, or NULL

Definition at line 961 of file netdevice.c.

961  {
962  struct net_device *netdev;
963 
964  /* Identify network device by index */
966  if ( netdev->scope_id == scope_id )
967  return netdev;
968  }
969 
970  return NULL;
971 }
struct list_head list
List of network devices.
Definition: netdevice.h:356
unsigned int scope_id
Scope ID.
Definition: netdevice.h:360
#define list_for_each_entry(pos, head, member)
Iterate over entries in a list.
Definition: list.h:420
static struct net_device * netdev
Definition: gdbudp.c:52
A network device.
Definition: netdevice.h:352
struct list_head net_devices
List of network devices.
Definition: netdevice.c:53
#define NULL
NULL pointer (VOID *)
Definition: Base.h:321

References net_device::list, list_for_each_entry, net_devices, netdev, NULL, and net_device::scope_id.

Referenced by ipv6_sock_ntoa(), and register_netdev().

◆ find_netdev_by_location()

struct net_device* find_netdev_by_location ( unsigned int  bus_type,
unsigned int  location 
)

Get network device by PCI bus:dev.fn address.

Parameters
bus_typeBus type
locationBus location
Return values
netdevNetwork device, or NULL

Definition at line 980 of file netdevice.c.

981  {
982  struct net_device *netdev;
983 
985  if ( ( netdev->dev->desc.bus_type == bus_type ) &&
986  ( netdev->dev->desc.location == location ) )
987  return netdev;
988  }
989 
990  return NULL;
991 }
struct list_head list
List of network devices.
Definition: netdevice.h:356
#define list_for_each_entry(pos, head, member)
Iterate over entries in a list.
Definition: list.h:420
static struct net_device * netdev
Definition: gdbudp.c:52
unsigned int location
Location.
Definition: device.h:29
A network device.
Definition: netdevice.h:352
struct device * dev
Underlying hardware device.
Definition: netdevice.h:364
unsigned int bus_type
Bus type.
Definition: device.h:24
struct device_description desc
Device description.
Definition: device.h:79
struct list_head net_devices
List of network devices.
Definition: netdevice.c:53
#define NULL
NULL pointer (VOID *)
Definition: Base.h:321

References device_description::bus_type, device::desc, net_device::dev, net_device::list, list_for_each_entry, device_description::location, net_devices, netdev, and NULL.

Referenced by pxenv_start_undi().

◆ last_opened_netdev()

struct net_device* last_opened_netdev ( void  )

Get most recently opened network device.

Return values
netdevMost recently opened network device, or NULL

Definition at line 998 of file netdevice.c.

998  {
999  struct net_device *netdev;
1000 
1002  open_list );
1003  if ( ! netdev )
1004  return NULL;
1005 
1006  assert ( netdev_is_open ( netdev ) );
1007  return netdev;
1008 }
#define list_first_entry(list, type, member)
Get the container of the first entry in a list.
Definition: list.h:333
static int netdev_is_open(struct net_device *netdev)
Check whether or not network device is open.
Definition: netdevice.h:664
assert((readw(&hdr->flags) &(GTF_reading|GTF_writing))==0)
static struct net_device * netdev
Definition: gdbudp.c:52
static struct list_head open_net_devices
List of open network devices, in reverse order of opening.
Definition: netdevice.c:56
A network device.
Definition: netdevice.h:352
struct list_head open_list
List of open network devices.
Definition: netdevice.h:358
#define NULL
NULL pointer (VOID *)
Definition: Base.h:321

References assert(), list_first_entry, netdev, netdev_is_open(), NULL, net_device::open_list, and open_net_devices.

Referenced by aoe_open(), find_netdev(), ipv6_sock_aton(), last_opened_snpdev(), nbi_prepare_dhcp(), and pxe_exec().

◆ net_tx()

int net_tx ( struct io_buffer iobuf,
struct net_device netdev,
struct net_protocol net_protocol,
const void *  ll_dest,
const void *  ll_source 
)

Transmit network-layer packet.

Parameters
iobufI/O buffer
netdevNetwork device
net_protocolNetwork-layer protocol
ll_destDestination link-layer address
ll_sourceSource link-layer address
Return values
rcReturn status code

Prepends link-layer headers to the I/O buffer and transmits the packet via the specified network device. This function takes ownership of the I/O buffer.

Definition at line 1024 of file netdevice.c.

1026  {
1028  int rc;
1029 
1030  /* Add link-layer header */
1031  if ( ( rc = ll_protocol->push ( netdev, iobuf, ll_dest, ll_source,
1032  net_protocol->net_proto ) ) != 0 ) {
1033  /* Record error for diagnosis */
1034  netdev_tx_err ( netdev, iobuf, rc );
1035  return rc;
1036  }
1037 
1038  /* Transmit packet */
1039  return netdev_tx ( netdev, iobuf );
1040 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
void netdev_tx_err(struct net_device *netdev, struct io_buffer *iobuf, int rc)
Discard transmitted packet.
Definition: netdevice.c:393
A link-layer protocol.
Definition: netdevice.h:114
int(* push)(struct net_device *netdev, struct io_buffer *iobuf, const void *ll_dest, const void *ll_source, uint16_t net_proto)
Add link-layer header.
Definition: netdevice.h:127
static struct net_device * netdev
Definition: gdbudp.c:52
int netdev_tx(struct net_device *netdev, struct io_buffer *iobuf)
Transmit raw packet via network device.
Definition: netdevice.c:287
uint16_t net_proto
Network-layer protocol.
Definition: netdevice.h:99
A network-layer protocol.
Definition: netdevice.h:64
struct ll_protocol * ll_protocol
Link-layer protocol.
Definition: netdevice.h:372

References net_device::ll_protocol, net_protocol::net_proto, netdev, netdev_tx(), netdev_tx_err(), ll_protocol::push, and rc.

Referenced by aoecmd_tx(), arp_rx(), arp_tx_request(), eth_slow_lacp_rx(), eth_slow_marker_rx(), fcoe_deliver(), fcoe_fip_tx_keepalive(), fcoe_fip_tx_solicitation(), fcoe_fip_tx_vlan(), ipv4_tx(), ipv6_tx(), loopback_test(), neighbour_discovered(), neighbour_tx(), vlan_transmit(), and wpa_send_eapol().

◆ net_rx()

int net_rx ( struct io_buffer iobuf,
struct net_device netdev,
uint16_t  net_proto,
const void *  ll_dest,
const void *  ll_source,
unsigned int  flags 
)

Process received network-layer packet.

Parameters
iobufI/O buffer
netdevNetwork device
net_protoNetwork-layer protocol, in network-byte order
ll_destDestination link-layer address
ll_sourceSource link-layer address
flagsPacket flags
Return values
rcReturn status code

Definition at line 1053 of file netdevice.c.

1055  {
1056  struct net_protocol *net_protocol;
1057 
1058  /* Hand off to network-layer protocol, if any */
1060  if ( net_protocol->net_proto == net_proto )
1061  return net_protocol->rx ( iobuf, netdev, ll_dest,
1062  ll_source, flags );
1063  }
1064 
1065  DBGC ( netdev, "NETDEV %s unknown network protocol %04x\n",
1066  netdev->name, ntohs ( net_proto ) );
1067  free_iob ( iobuf );
1068  return -ENOTSUP;
1069 }
void free_iob(struct io_buffer *iobuf)
Free I/O buffer.
Definition: iobuf.c:146
#define DBGC(...)
Definition: compiler.h:505
#define ntohs(value)
Definition: byteswap.h:136
#define ENOTSUP
Operation not supported.
Definition: errno.h:589
static struct net_device * netdev
Definition: gdbudp.c:52
#define NET_PROTOCOLS
Network-layer protocol table.
Definition: netdevice.h:467
#define for_each_table_entry(pointer, table)
Iterate through all entries within a linker table.
Definition: tables.h:385
uint16_t net_proto
Network-layer protocol.
Definition: netdevice.h:99
A network-layer protocol.
Definition: netdevice.h:64
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362
int(* rx)(struct io_buffer *iobuf, struct net_device *netdev, const void *ll_dest, const void *ll_source, unsigned int flags)
Process received packet.
Definition: netdevice.h:79
uint8_t flags
Flags.
Definition: ena.h:18

References DBGC, ENOTSUP, flags, for_each_table_entry, free_iob(), net_device::name, net_protocol::net_proto, NET_PROTOCOLS, netdev, ntohs, and net_protocol::rx.

Referenced by net_poll().

◆ net_poll()

void net_poll ( void  )

Poll the network stack.

This polls all interfaces for received packets, and processes packets from the RX queue.

Definition at line 1077 of file netdevice.c.

1077  {
1078  struct net_device *netdev;
1079  struct io_buffer *iobuf;
1080  struct ll_protocol *ll_protocol;
1081  const void *ll_dest;
1082  const void *ll_source;
1083  uint16_t net_proto;
1084  unsigned int flags;
1085  int rc;
1086 
1087  /* Poll and process each network device */
1088  list_for_each_entry ( netdev, &net_devices, list ) {
1089 
1090  /* Poll for new packets */
1091  profile_start ( &net_poll_profiler );
1092  netdev_poll ( netdev );
1093  profile_stop ( &net_poll_profiler );
1094 
1095  /* Leave received packets on the queue if receive
1096  * queue processing is currently frozen. This will
1097  * happen when the raw packets are to be manually
1098  * dequeued using netdev_rx_dequeue(), rather than
1099  * processed via the usual networking stack.
1100  */
1101  if ( netdev_rx_frozen ( netdev ) )
1102  continue;
1103 
1104  /* Process all received packets */
1105  while ( ( iobuf = netdev_rx_dequeue ( netdev ) ) ) {
1106 
1107  DBGC2 ( netdev, "NETDEV %s processing %p (%p+%zx)\n",
1108  netdev->name, iobuf, iobuf->data,
1109  iob_len ( iobuf ) );
1110  profile_start ( &net_rx_profiler );
1111 
1112  /* Remove link-layer header */
1114  if ( ( rc = ll_protocol->pull ( netdev, iobuf,
1115  &ll_dest, &ll_source,
1116  &net_proto,
1117  &flags ) ) != 0 ) {
1118  free_iob ( iobuf );
1119  continue;
1120  }
1121 
1122  /* Hand packet to network layer */
1123  if ( ( rc = net_rx ( iob_disown ( iobuf ), netdev,
1124  net_proto, ll_dest,
1125  ll_source, flags ) ) != 0 ) {
1126  /* Record error for diagnosis */
1127  netdev_rx_err ( netdev, NULL, rc );
1128  }
1129  profile_stop ( &net_rx_profiler );
1130  }
1131  }
1132 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
unsigned short uint16_t
Definition: stdint.h:11
void netdev_rx_err(struct net_device *netdev, struct io_buffer *iobuf, int rc)
Discard received packet.
Definition: netdevice.c:539
void free_iob(struct io_buffer *iobuf)
Free I/O buffer.
Definition: iobuf.c:146
static void profile_stop(struct profiler *profiler)
Stop profiling.
Definition: profile.h:171
A link-layer protocol.
Definition: netdevice.h:114
#define iob_disown(iobuf)
Disown an I/O buffer.
Definition: iobuf.h:212
#define list_for_each_entry(pos, head, member)
Iterate over entries in a list.
Definition: list.h:420
static struct net_device * netdev
Definition: gdbudp.c:52
static void profile_start(struct profiler *profiler)
Start profiling.
Definition: profile.h:158
void netdev_poll(struct net_device *netdev)
Poll for completed and received packets on network device.
Definition: netdevice.c:565
static size_t iob_len(struct io_buffer *iobuf)
Calculate length of data in an I/O buffer.
Definition: iobuf.h:155
int net_rx(struct io_buffer *iobuf, struct net_device *netdev, uint16_t net_proto, const void *ll_dest, const void *ll_source, unsigned int flags)
Process received network-layer packet.
Definition: netdevice.c:1053
A network device.
Definition: netdevice.h:352
int(* pull)(struct net_device *netdev, struct io_buffer *iobuf, const void **ll_dest, const void **ll_source, uint16_t *net_proto, unsigned int *flags)
Remove link-layer header.
Definition: netdevice.h:141
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362
#define DBGC2(...)
Definition: compiler.h:522
void * data
Start of data.
Definition: iobuf.h:48
struct list_head net_devices
List of network devices.
Definition: netdevice.c:53
static int netdev_rx_frozen(struct net_device *netdev)
Check whether or not network device receive queue processing is frozen.
Definition: netdevice.h:698
#define NULL
NULL pointer (VOID *)
Definition: Base.h:321
struct ll_protocol * ll_protocol
Link-layer protocol.
Definition: netdevice.h:372
struct io_buffer * netdev_rx_dequeue(struct net_device *netdev)
Remove packet from device's receive queue.
Definition: netdevice.c:590
A persistent I/O buffer.
Definition: iobuf.h:33
uint8_t flags
Flags.
Definition: ena.h:18

References io_buffer::data, DBGC2, flags, free_iob(), iob_disown, iob_len(), list_for_each_entry, net_device::ll_protocol, net_device::name, net_devices, net_rx(), netdev, netdev_poll(), netdev_rx_dequeue(), netdev_rx_err(), netdev_rx_frozen(), NULL, profile_start(), profile_stop(), ll_protocol::pull, and rc.

Referenced by loopback_wait(), net_step(), and pxenv_undi_isr().

◆ net_step()

static void net_step ( struct process *process  __unused)
static

Single-step the network stack.

Parameters
processNetwork stack process

Definition at line 1139 of file netdevice.c.

1139  {
1140  net_poll();
1141 }
void net_poll(void)
Poll the network stack.
Definition: netdevice.c:1077

References net_poll().

◆ vlan_tci()

__weak unsigned int vlan_tci ( struct net_device *netdev  __unused)

Get the VLAN tag control information (when VLAN support is not present)

Parameters
netdevNetwork device
Return values
tag0, indicating that device is not a VLAN device

Definition at line 1149 of file netdevice.c.

1149  {
1150  return 0;
1151 }

Referenced by efi_snp_probe(), and efi_vlan_find().

◆ vlan_netdev_rx()

__weak void vlan_netdev_rx ( struct net_device netdev,
unsigned int  tag,
struct io_buffer iobuf 
)

Add VLAN tag-stripped packet to queue (when VLAN support is not present)

Parameters
netdevNetwork device
tagVLAN tag, or zero
iobufI/O buffer

Definition at line 1160 of file netdevice.c.

1161  {
1162 
1163  if ( tag == 0 ) {
1164  netdev_rx ( netdev, iobuf );
1165  } else {
1166  netdev_rx_err ( netdev, iobuf, -ENODEV );
1167  }
1168 }
void netdev_rx_err(struct net_device *netdev, struct io_buffer *iobuf, int rc)
Discard received packet.
Definition: netdevice.c:539
static struct net_device * netdev
Definition: gdbudp.c:52
#define ENODEV
No such device.
Definition: errno.h:509
void netdev_rx(struct net_device *netdev, struct io_buffer *iobuf)
Add packet to receive queue.
Definition: netdevice.c:501
uint64_t tag
Identity tag.
Definition: edd.h:30

Referenced by hermon_eth_complete_recv(), and intelxl_poll_rx().

◆ vlan_netdev_rx_err()

__weak void vlan_netdev_rx_err ( struct net_device netdev,
unsigned int tag  __unused,
struct io_buffer iobuf,
int  rc 
)

Discard received VLAN tag-stripped packet (when VLAN support is not present)

Parameters
netdevNetwork device
tagVLAN tag, or zero
iobufI/O buffer, or NULL
rcPacket status code

Definition at line 1178 of file netdevice.c.

1180  {
1181 
1182  netdev_rx_err ( netdev, iobuf, rc );
1183 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
void netdev_rx_err(struct net_device *netdev, struct io_buffer *iobuf, int rc)
Discard received packet.
Definition: netdevice.c:539
static struct net_device * netdev
Definition: gdbudp.c:52

Referenced by hermon_eth_complete_recv(), and intelxl_poll_rx().

◆ PERMANENT_PROCESS()

PERMANENT_PROCESS ( net_process  ,
net_step   
)

Networking stack process.

◆ net_discard()

static unsigned int net_discard ( void  )
static

Discard some cached network device data.

Return values
discardedNumber of cached items discarded

Definition at line 1193 of file netdevice.c.

1193  {
1194  struct net_device *netdev;
1195  struct io_buffer *iobuf;
1196  unsigned int discarded = 0;
1197 
1198  /* Try to drop one deferred TX packet from each network device */
1199  for_each_netdev ( netdev ) {
1200  if ( ( iobuf = list_first_entry ( &netdev->tx_deferred,
1201  struct io_buffer,
1202  list ) ) != NULL ) {
1203 
1204  /* Discard first deferred packet */
1205  list_del ( &iobuf->list );
1206  if ( dma_mapped ( &iobuf->map ) )
1207  iob_unmap ( iobuf );
1208  free_iob ( iobuf );
1209 
1210  /* Report discard */
1211  discarded++;
1212  }
1213  }
1214 
1215  return discarded;
1216 }
struct dma_mapping map
DMA mapping.
Definition: iobuf.h:43
void free_iob(struct io_buffer *iobuf)
Free I/O buffer.
Definition: iobuf.c:146
#define list_first_entry(list, type, member)
Get the container of the first entry in a list.
Definition: list.h:333
#define list_del(list)
Delete an entry from a list.
Definition: list.h:119
static __always_inline int dma_mapped(struct dma_mapping *map)
Check if DMA unmapping is required.
Definition: dma.h:449
static __always_inline void iob_unmap(struct io_buffer *iobuf)
Unmap I/O buffer for DMA.
Definition: iobuf.h:275
static struct net_device * netdev
Definition: gdbudp.c:52
struct list_head tx_deferred
Deferred TX packet queue.
Definition: netdevice.h:419
#define for_each_netdev(netdev)
Iterate over all network devices.
Definition: netdevice.h:538
A network device.
Definition: netdevice.h:352
struct list_head list
List of which this buffer is a member.
Definition: iobuf.h:40
#define NULL
NULL pointer (VOID *)
Definition: Base.h:321
A persistent I/O buffer.
Definition: iobuf.h:33

References dma_mapped(), for_each_netdev, free_iob(), iob_unmap(), io_buffer::list, list_del, list_first_entry, io_buffer::map, netdev, NULL, and net_device::tx_deferred.

◆ __cache_discarder()

struct cache_discarder net_discarder __cache_discarder ( CACHE_NORMAL  )

Network device cache discarder.

◆ find_netdev_configurator()

struct net_device_configurator* find_netdev_configurator ( const char *  name)

Find network device configurator.

Parameters
nameName
Return values
configuratorNetwork device configurator, or NULL

Definition at line 1229 of file netdevice.c.

1229  {
1230  struct net_device_configurator *configurator;
1231 
1233  if ( strcmp ( configurator->name, name ) == 0 )
1234  return configurator;
1235  }
1236  return NULL;
1237 }
const char * name
Definition: ath9k_hw.c:1984
const char * name
Name.
Definition: netdevice.h:315
#define for_each_table_entry(pointer, table)
Iterate through all entries within a linker table.
Definition: tables.h:385
int strcmp(const char *first, const char *second)
Compare strings.
Definition: string.c:173
A network device configurator.
Definition: netdevice.h:313
#define NET_DEVICE_CONFIGURATORS
Network device configurator table.
Definition: netdevice.h:332
#define NULL
NULL pointer (VOID *)
Definition: Base.h:321

References for_each_table_entry, net_device_configurator::name, name, NET_DEVICE_CONFIGURATORS, NULL, and strcmp().

Referenced by parse_netdev_configurator().

◆ netdev_configure()

int netdev_configure ( struct net_device netdev,
struct net_device_configurator configurator 
)

Start network device configuration.

Parameters
netdevNetwork device
configuratorNetwork device configurator
Return values
rcReturn status code

Definition at line 1246 of file netdevice.c.

1247  {
1248  struct net_device_configuration *config =
1250  int rc;
1251 
1252  /* Check applicability of configurator */
1254  DBGC ( netdev, "NETDEV %s does not support configuration via "
1255  "%s\n", netdev->name, configurator->name );
1256  return -ENOTSUP;
1257  }
1258 
1259  /* Terminate any ongoing configuration */
1260  intf_restart ( &config->job, -ECANCELED );
1261 
1262  /* Mark configuration as being in progress */
1263  config->rc = -EINPROGRESS_CONFIG;
1264 
1265  DBGC ( netdev, "NETDEV %s starting configuration via %s\n",
1267 
1268  /* Start configuration */
1269  if ( ( rc = configurator->start ( &config->job, netdev ) ) != 0 ) {
1270  DBGC ( netdev, "NETDEV %s could not start configuration via "
1271  "%s: %s\n", netdev->name, configurator->name,
1272  strerror ( rc ) );
1273  config->rc = rc;
1274  return rc;
1275  }
1276 
1277  return 0;
1278 }
#define EINPROGRESS_CONFIG
Default configuration-in-progress status code.
Definition: netdevice.c:78
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
const char * name
Name.
Definition: netdevice.h:315
void intf_restart(struct interface *intf, int rc)
Shut down and restart an object interface.
Definition: interface.c:342
int(* start)(struct interface *job, struct net_device *netdev)
Start configuring network device.
Definition: netdevice.h:328
struct interface job
Job control interface.
Definition: netdevice.h:309
#define DBGC(...)
Definition: compiler.h:505
#define ECANCELED
Operation canceled.
Definition: errno.h:343
#define ENOTSUP
Operation not supported.
Definition: errno.h:589
static struct net_device * netdev
Definition: gdbudp.c:52
char * strerror(int errno)
Retrieve string representation of error number.
Definition: strerror.c:78
static int netdev_configurator_applies(struct net_device *netdev, struct net_device_configurator *configurator)
Check if configurator applies to network device.
Definition: netdevice.h:629
char name[NETDEV_NAME_LEN]
Name of this network device.
Definition: netdevice.h:362
int rc
Configuration status.
Definition: netdevice.h:307
struct net_device_configurator * configurator
Network device configurator.
Definition: netdevice.h:305
A network device configuration.
Definition: netdevice.h:301
static struct net_device_configuration * netdev_configuration(struct net_device *netdev, struct net_device_configurator *configurator)
Get network device configuration.
Definition: netdevice.h:614

References net_device_configuration::configurator, DBGC, ECANCELED, EINPROGRESS_CONFIG, ENOTSUP, intf_restart(), net_device_configuration::job, net_device_configurator::name, net_device::name, netdev, netdev_configuration(), netdev_configurator_applies(), net_device_configuration::rc, rc, net_device_configurator::start, and strerror().

Referenced by ifconf(), and netdev_configure_all().

◆ netdev_configure_all()

int netdev_configure_all ( struct net_device netdev)

Start network device configuration via all supported configurators.

Parameters
netdevNetwork device
Return values
rcReturn status code

Definition at line 1286 of file netdevice.c.

1286  {
1287  struct net_device_configurator *configurator;
1288  int rc;
1289 
1290  /* Start configuration for each configurator */
1292 
1293  /* Skip any inapplicable configurators */
1294  if ( ! netdev_configurator_applies ( netdev, configurator ) )
1295  continue;
1296 
1297  /* Start configuration */
1298  if ( ( rc = netdev_configure ( netdev, configurator ) ) != 0 )
1299  return rc;
1300  }
1301 
1302  return 0;
1303 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
int netdev_configure(struct net_device *netdev, struct net_device_configurator *configurator)
Start network device configuration.
Definition: netdevice.c:1246
static struct net_device * netdev
Definition: gdbudp.c:52
#define for_each_table_entry(pointer, table)
Iterate through all entries within a linker table.
Definition: tables.h:385
static int netdev_configurator_applies(struct net_device *netdev, struct net_device_configurator *configurator)
Check if configurator applies to network device.
Definition: netdevice.h:629
A network device configurator.
Definition: netdevice.h:313
#define NET_DEVICE_CONFIGURATORS
Network device configurator table.
Definition: netdevice.h:332

References for_each_table_entry, NET_DEVICE_CONFIGURATORS, netdev, netdev_configurator_applies(), netdev_configure(), and rc.

Referenced by efi_pxe_dhcp(), and ifconf().

◆ netdev_has_configuration_rc()

static int netdev_has_configuration_rc ( struct net_device netdev,
int  rc 
)
static

Check if network device has a configuration with a specified status code.

Parameters
netdevNetwork device
rcStatus code
Return values
has_rcNetwork device has a configuration with this status code

Definition at line 1312 of file netdevice.c.

1312  {
1313  unsigned int num_configs;
1314  unsigned int i;
1315 
1316  num_configs = table_num_entries ( NET_DEVICE_CONFIGURATORS );
1317  for ( i = 0 ; i < num_configs ; i++ ) {
1318  if ( netdev->configs[i].rc == rc )
1319  return 1;
1320  }
1321  return 0;
1322 }
struct arbelprm_rc_send_wqe rc
Definition: arbel.h:14
struct net_device_configuration configs[0]
Network device configurations (variable length)
Definition: netdevice.h:434
static struct net_device * netdev
Definition: gdbudp.c:52
int rc
Configuration status.
Definition: netdevice.h:307
#define NET_DEVICE_CONFIGURATORS
Network device configurator table.
Definition: netdevice.h:332
#define table_num_entries(table)
Get number of entries in linker table.
Definition: tables.h:335

References net_device::configs, NET_DEVICE_CONFIGURATORS, netdev, net_device_configuration::rc, rc, and table_num_entries.

Referenced by netdev_configuration_in_progress(), and netdev_configuration_ok().

◆ netdev_configuration_in_progress()

int netdev_configuration_in_progress ( struct net_device netdev)

Check if network device configuration is in progress.

Parameters
netdevNetwork device
Return values
is_in_progressNetwork device configuration is in progress

Definition at line 1330 of file netdevice.c.

1330  {
1331 
1333 }
#define EINPROGRESS_CONFIG
Default configuration-in-progress status code.
Definition: netdevice.c:78
static struct net_device * netdev
Definition: gdbudp.c:52
static int netdev_has_configuration_rc(struct net_device *netdev, int rc)
Check if network device has a configuration with a specified status code.
Definition: netdevice.c:1312

References EINPROGRESS_CONFIG, netdev, and netdev_has_configuration_rc().

Referenced by efi_pxe_dhcp(), and ifconf_progress().

◆ netdev_configuration_ok()

int netdev_configuration_ok ( struct net_device netdev)

Check if network device has at least one successful configuration.

Parameters
netdevNetwork device
configuratorConfigurator
Return values
rcReturn status code

Definition at line 1342 of file netdevice.c.

1342  {
1343 
1344  return netdev_has_configuration_rc ( netdev, 0 );
1345 }
static struct net_device * netdev
Definition: gdbudp.c:52
static int netdev_has_configuration_rc(struct net_device *netdev, int rc)
Check if network device has a configuration with a specified status code.
Definition: netdevice.c:1312

References netdev, and netdev_has_configuration_rc().

Referenced by efi_pxe_dhcp(), and ifconf_progress().

Variable Documentation

◆ net_devices

struct list_head net_devices = LIST_HEAD_INIT ( net_devices )

List of network devices.

Definition at line 53 of file netdevice.c.

Referenced by find_netdev(), find_netdev_by_location(), find_netdev_by_scope_id(), have_netdevs(), net_poll(), and register_netdev().

◆ open_net_devices

struct list_head open_net_devices = LIST_HEAD_INIT ( open_net_devices )
static

List of open network devices, in reverse order of opening.

Definition at line 56 of file netdevice.c.

Referenced by last_opened_netdev(), and netdev_open().

◆ __profiler

struct profiler net_tx_profiler __profiler = { .name = "net.poll" }
static

Network polling profiler.

Network transmit profiler.

Network receive profiler.

Definition at line 59 of file netdevice.c.

◆ __errortab

struct errortab netdev_errors [] __errortab
Initial value:
= {
}
#define EINFO_EINPROGRESS_CONFIG
Definition: netdevice.c:79
#define __einfo_errortab(einfo)
Definition: errortab.h:23
#define EINFO_ENOTCONN_LINK_DOWN
Definition: netdevice.c:84
#define EINFO_EUNKNOWN_LINK_STATUS
Definition: netdevice.c:69
#define EINFO_EUNUSED_CONFIG
Definition: netdevice.c:74

Human-readable message for the default link statuses.

Definition at line 88 of file netdevice.c.

◆ netdev_config_ops

struct interface_operation netdev_config_ops[]
static
Initial value:
= {
}
void intf_close(struct interface *intf, int rc)
Close an object interface.
Definition: interface.c:249
static void netdev_config_close(struct net_device_configuration *config, int rc)
Finish network device configuration.
Definition: netdevice.c:621
#define INTF_OP(op_type, object_type, op_func)
Define an object interface operation.
Definition: interface.h:32
A network device configuration.
Definition: netdevice.h:301

Network device configuration interface operations.

Definition at line 641 of file netdevice.c.

◆ netdev_config_desc

struct interface_descriptor netdev_config_desc
static
Initial value:
=
static struct interface_operation netdev_config_ops[]
Network device configuration interface operations.
Definition: netdevice.c:641
#define INTF_DESC(object_type, intf, operations)
Define an object interface descriptor.
Definition: interface.h:80
A network device configuration.
Definition: netdevice.h:301

Network device configuration interface descriptor.

Definition at line 647 of file netdevice.c.

Referenced by alloc_netdev().