#include "list.h"
#include "netdev-provider.h"
#include "ofpbuf.h"
+#include "openflow/openflow.h"
#include "packets.h"
#include "poll-loop.h"
#include "shash.h"
};
static int n_netdev_classes = ARRAY_SIZE(netdev_classes);
+/* All created network devices. */
+static struct shash netdev_obj_shash = SHASH_INITIALIZER(&netdev_obj_shash);
+
/* All open network devices. */
static struct list netdev_list = LIST_INITIALIZER(&netdev_list);
* otherwise a positive errno value.
*
* Calling this function is optional. If not called explicitly, it will
- * automatically be called upon the first attempt to open a network device. */
+ * automatically be called upon the first attempt to open or create a
+ * network device. */
int
netdev_initialize(void)
{
netdev_classes[j++] = class;
} else {
VLOG_ERR("failed to initialize %s network device "
- "class: %s", class->name, strerror(retval));
+ "class: %s", class->type, strerror(retval));
if (!status) {
status = retval;
}
}
}
+/* Attempts to create a network device object of 'type' with 'name'. 'type'
+ * corresponds to the 'type' field used in the netdev_class * structure.
+ * Arguments for creation are provided in 'args', which may be empty or NULL
+ * if none are needed. */
+int
+netdev_create(const char *name, const char *type, const struct shash *args)
+{
+ struct shash empty_args = SHASH_INITIALIZER(&empty_args);
+ int i;
+
+ netdev_initialize();
+
+ if (!args) {
+ args = &empty_args;
+ }
+
+ if (shash_find(&netdev_obj_shash, name)) {
+ VLOG_WARN("attempted to create a netdev object with bound name: %s",
+ name);
+ return EEXIST;
+ }
+
+ for (i = 0; i < n_netdev_classes; i++) {
+ const struct netdev_class *class = netdev_classes[i];
+ if (!strcmp(type, class->type)) {
+ return class->create(name, type, args, true);
+ }
+ }
+
+ VLOG_WARN("could not create netdev object of unknown type: %s", type);
+
+ return EINVAL;
+}
+
+/* Destroys netdev object 'name'. Netdev objects maintain a reference count
+ * which is incremented on netdev_open() and decremented on netdev_close().
+ * If 'name' has a non-zero reference count, it will not destroy the object
+ * and return EBUSY. */
+int
+netdev_destroy(const char *name)
+{
+ struct shash_node *node;
+ struct netdev_obj *netdev_obj;
+
+ node = shash_find(&netdev_obj_shash, name);
+ if (!node) {
+ return ENODEV;
+ }
+
+ netdev_obj = node->data;
+ if (netdev_obj->ref_cnt != 0) {
+ VLOG_WARN("attempt to destroy open netdev object (%d): %s",
+ netdev_obj->ref_cnt, name);
+ return EBUSY;
+ }
+
+ shash_delete(&netdev_obj_shash, node);
+ netdev_obj->netdev_class->destroy(netdev_obj);
+
+ return 0;
+}
+
+/* Reconfigures the device object 'name' with 'args'. 'args' may be empty
+ * or NULL if none are needed. */
+int
+netdev_reconfigure(const char *name, const struct shash *args)
+{
+ struct shash empty_args = SHASH_INITIALIZER(&empty_args);
+ struct netdev_obj *netdev_obj;
+
+ if (!args) {
+ args = &empty_args;
+ }
+
+ netdev_obj = shash_find_data(&netdev_obj_shash, name);
+ if (!netdev_obj) {
+ return ENODEV;
+ }
+
+ if (netdev_obj->netdev_class->reconfigure) {
+ return netdev_obj->netdev_class->reconfigure(netdev_obj, args);
+ }
+
+ return 0;
+}
+
/* Opens the network device named 'name' (e.g. "eth0") and returns zero if
* successful, otherwise a positive errno value. On success, sets '*netdevp'
* to the new network device, otherwise to null.
* the 'enum netdev_pseudo_ethertype' values to receive frames in one of those
* categories. */
int
-netdev_open(const char *name_, int ethertype, struct netdev **netdevp)
+netdev_open(const char *name, int ethertype, struct netdev **netdevp)
{
- char *name = xstrdup(name_);
- char *prefix, *suffix, *colon;
+ struct netdev_obj *netdev_obj;
struct netdev *netdev = NULL;
int error;
int i;
netdev_initialize();
- colon = strchr(name, ':');
- if (colon) {
- *colon = '\0';
- prefix = name;
- suffix = colon + 1;
+
+ netdev_obj = shash_find_data(&netdev_obj_shash, name);
+ if (netdev_obj) {
+ error = netdev_obj->netdev_class->open(name, ethertype, &netdev);
} else {
- prefix = "";
- suffix = name;
- }
+ /* Default to "system". */
+ error = EAFNOSUPPORT;
+ for (i = 0; i < n_netdev_classes; i++) {
+ const struct netdev_class *class = netdev_classes[i];
+ if (!strcmp(class->type, "system")) {
+ struct shash empty_args = SHASH_INITIALIZER(&empty_args);
- for (i = 0; i < n_netdev_classes; i++) {
- const struct netdev_class *class = netdev_classes[i];
- if (!strcmp(prefix, class->prefix)) {
- error = class->open(name_, suffix, ethertype, &netdev);
- goto exit;
+ /* Dynamically create the netdev object, but indicate
+ * that it should be destroyed when the the last user
+ * closes its handle. */
+ error = class->create(name, "system", &empty_args, false);
+ if (!error) {
+ error = class->open(name, ethertype, &netdev);
+ netdev_obj = shash_find_data(&netdev_obj_shash, name);
+ }
+ break;
+ }
}
}
- error = EAFNOSUPPORT;
+ if (!error) {
+ netdev_obj->ref_cnt++;
+ }
-exit:
*netdevp = error ? NULL : netdev;
- free(name);
return error;
}
netdev_close(struct netdev *netdev)
{
if (netdev) {
- char *name;
+ struct netdev_obj *netdev_obj;
+ char *name = netdev->name;
int error;
+ netdev_obj = shash_find_data(&netdev_obj_shash, name);
+ assert(netdev_obj);
+ if (netdev_obj->ref_cnt > 0) {
+ netdev_obj->ref_cnt--;
+ } else {
+ VLOG_WARN("netdev %s closed too many times", name);
+ }
+
+ /* If the reference count for the netdev object is zero, and it
+ * was dynamically created by netdev_open(), destroy it. */
+ if (!netdev_obj->ref_cnt && !netdev_obj->created) {
+ netdev_destroy(name);
+ }
+
/* Restore flags that we changed, if any. */
fatal_signal_block();
error = restore_flags(netdev);
fatal_signal_unblock();
if (error) {
VLOG_WARN("failed to restore network device flags on %s: %s",
- netdev->name, strerror(error));
+ name, strerror(error));
}
/* Free. */
- name = netdev->name;
- netdev->class->close(netdev);
+ netdev->netdev_class->close(netdev);
free(name);
}
}
int retval = class->enumerate(svec);
if (retval) {
VLOG_WARN("failed to enumerate %s network devices: %s",
- class->name, strerror(retval));
+ class->type, strerror(retval));
if (!error) {
error = retval;
}
assert(buffer->size == 0);
assert(ofpbuf_tailroom(buffer) >= ETH_TOTAL_MIN);
- retval = netdev->class->recv(netdev,
- buffer->data, ofpbuf_tailroom(buffer));
+ retval = netdev->netdev_class->recv(netdev,
+ buffer->data, ofpbuf_tailroom(buffer));
if (retval >= 0) {
COVERAGE_INC(netdev_received);
buffer->size += retval;
void
netdev_recv_wait(struct netdev *netdev)
{
- netdev->class->recv_wait(netdev);
+ netdev->netdev_class->recv_wait(netdev);
}
/* Discards all packets waiting to be received from 'netdev'. */
int
netdev_drain(struct netdev *netdev)
{
- return netdev->class->drain(netdev);
+ return netdev->netdev_class->drain(netdev);
}
/* Sends 'buffer' on 'netdev'. Returns 0 if successful, otherwise a positive
int
netdev_send(struct netdev *netdev, const struct ofpbuf *buffer)
{
- int error = netdev->class->send(netdev, buffer->data, buffer->size);
+ int error = netdev->netdev_class->send(netdev, buffer->data, buffer->size);
if (!error) {
COVERAGE_INC(netdev_sent);
}
void
netdev_send_wait(struct netdev *netdev)
{
- return netdev->class->send_wait(netdev);
+ return netdev->netdev_class->send_wait(netdev);
}
/* Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful,
int
netdev_set_etheraddr(struct netdev *netdev, const uint8_t mac[ETH_ADDR_LEN])
{
- return netdev->class->set_etheraddr(netdev, mac);
+ return netdev->netdev_class->set_etheraddr(netdev, mac);
}
/* Retrieves 'netdev''s MAC address. If successful, returns 0 and copies the
int
netdev_get_etheraddr(const struct netdev *netdev, uint8_t mac[ETH_ADDR_LEN])
{
- return netdev->class->get_etheraddr(netdev, mac);
+ return netdev->netdev_class->get_etheraddr(netdev, mac);
}
/* Returns the name of the network device that 'netdev' represents,
int
netdev_get_mtu(const struct netdev *netdev, int *mtup)
{
- int error = netdev->class->get_mtu(netdev, mtup);
+ int error = netdev->netdev_class->get_mtu(netdev, mtup);
if (error) {
VLOG_WARN_RL(&rl, "failed to retrieve MTU for network device %s: %s",
netdev_get_name(netdev), strerror(error));
return error;
}
+/* Returns the ifindex of 'netdev', if successful, as a positive number. On
+ * failure, returns a negative errno value.
+ *
+ * The desired semantics of the ifindex value are a combination of those
+ * specified by POSIX for if_nametoindex() and by SNMP for ifIndex. An ifindex
+ * value should be unique within a host and remain stable at least until
+ * reboot. SNMP says an ifindex "ranges between 1 and the value of ifNumber"
+ * but many systems do not follow this rule anyhow.
+ */
+int
+netdev_get_ifindex(const struct netdev *netdev)
+{
+ return netdev->netdev_class->get_ifindex(netdev);
+}
+
/* Stores the features supported by 'netdev' into each of '*current',
* '*advertised', '*supported', and '*peer' that are non-null. Each value is a
* bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
uint32_t *supported, uint32_t *peer)
{
uint32_t dummy[4];
- return netdev->class->get_features(netdev,
- current ? current : &dummy[0],
- advertised ? advertised : &dummy[1],
- supported ? supported : &dummy[2],
- peer ? peer : &dummy[3]);
+ int error;
+
+ if (!current) {
+ current = &dummy[0];
+ }
+ if (!advertised) {
+ advertised = &dummy[1];
+ }
+ if (!supported) {
+ supported = &dummy[2];
+ }
+ if (!peer) {
+ peer = &dummy[3];
+ }
+
+ error = netdev->netdev_class->get_features(netdev, current, advertised,
+ supported, peer);
+ if (error) {
+ *current = *advertised = *supported = *peer = 0;
+ }
+ return error;
+}
+
+/* Returns the maximum speed of a network connection that has the "enum
+ * ofp_port_features" bits in 'features', in bits per second. If no bits that
+ * indicate a speed are set in 'features', assumes 100Mbps. */
+uint64_t
+netdev_features_to_bps(uint32_t features)
+{
+ enum {
+ F_10000MB = OFPPF_10GB_FD,
+ F_1000MB = OFPPF_1GB_HD | OFPPF_1GB_FD,
+ F_100MB = OFPPF_100MB_HD | OFPPF_100MB_FD,
+ F_10MB = OFPPF_10MB_HD | OFPPF_10MB_FD
+ };
+
+ return ( features & F_10000MB ? UINT64_C(10000000000)
+ : features & F_1000MB ? UINT64_C(1000000000)
+ : features & F_100MB ? UINT64_C(100000000)
+ : features & F_10MB ? UINT64_C(10000000)
+ : UINT64_C(100000000));
+}
+
+/* Returns true if any of the "enum ofp_port_features" bits that indicate a
+ * full-duplex link are set in 'features', otherwise false. */
+bool
+netdev_features_is_full_duplex(uint32_t features)
+{
+ return (features & (OFPPF_10MB_FD | OFPPF_100MB_FD | OFPPF_1GB_FD
+ | OFPPF_10GB_FD)) != 0;
}
/* Set the features advertised by 'netdev' to 'advertise'. Returns 0 if
int
netdev_set_advertisements(struct netdev *netdev, uint32_t advertise)
{
- return (netdev->class->set_advertisements
- ? netdev->class->set_advertisements(netdev, advertise)
+ return (netdev->netdev_class->set_advertisements
+ ? netdev->netdev_class->set_advertisements(netdev, advertise)
: EOPNOTSUPP);
}
struct in_addr netmask;
int error;
- error = (netdev->class->get_in4
- ? netdev->class->get_in4(netdev, &address, &netmask)
+ error = (netdev->netdev_class->get_in4
+ ? netdev->netdev_class->get_in4(netdev, &address, &netmask)
: EOPNOTSUPP);
if (address_) {
address_->s_addr = error ? 0 : address.s_addr;
int
netdev_set_in4(struct netdev *netdev, struct in_addr addr, struct in_addr mask)
{
- return (netdev->class->set_in4
- ? netdev->class->set_in4(netdev, addr, mask)
+ return (netdev->netdev_class->set_in4
+ ? netdev->netdev_class->set_in4(netdev, addr, mask)
: EOPNOTSUPP);
}
netdev_add_router(struct netdev *netdev, struct in_addr router)
{
COVERAGE_INC(netdev_add_router);
- return (netdev->class->add_router
- ? netdev->class->add_router(netdev, router)
+ return (netdev->netdev_class->add_router
+ ? netdev->netdev_class->add_router(netdev, router)
: EOPNOTSUPP);
}
const struct in_addr *host, struct in_addr *next_hop,
char **netdev_name)
{
- int error = (netdev->class->get_next_hop
- ? netdev->class->get_next_hop(host, next_hop, netdev_name)
+ int error = (netdev->netdev_class->get_next_hop
+ ? netdev->netdev_class->get_next_hop(host, next_hop,
+ netdev_name)
: EOPNOTSUPP);
if (error) {
next_hop->s_addr = 0;
struct in6_addr dummy;
int error;
- error = (netdev->class->get_in6
- ? netdev->class->get_in6(netdev, in6 ? in6 : &dummy)
+ error = (netdev->netdev_class->get_in6
+ ? netdev->netdev_class->get_in6(netdev, in6 ? in6 : &dummy)
: EOPNOTSUPP);
if (error && in6) {
memset(in6, 0, sizeof *in6);
enum netdev_flags old_flags;
int error;
- error = netdev->class->update_flags(netdev, off & ~on, on, &old_flags);
+ error = netdev->netdev_class->update_flags(netdev, off & ~on,
+ on, &old_flags);
if (error) {
VLOG_WARN_RL(&rl, "failed to %s flags for network device %s: %s",
off || on ? "set" : "get", netdev_get_name(netdev),
netdev_arp_lookup(const struct netdev *netdev,
uint32_t ip, uint8_t mac[ETH_ADDR_LEN])
{
- int error = (netdev->class->arp_lookup
- ? netdev->class->arp_lookup(netdev, ip, mac)
+ int error = (netdev->netdev_class->arp_lookup
+ ? netdev->netdev_class->arp_lookup(netdev, ip, mac)
: EOPNOTSUPP);
if (error) {
memset(mac, 0, ETH_ADDR_LEN);
int
netdev_get_carrier(const struct netdev *netdev, bool *carrier)
{
- int error = (netdev->class->get_carrier
- ? netdev->class->get_carrier(netdev, carrier)
+ int error = (netdev->netdev_class->get_carrier
+ ? netdev->netdev_class->get_carrier(netdev, carrier)
: EOPNOTSUPP);
if (error) {
*carrier = false;
int error;
COVERAGE_INC(netdev_get_stats);
- error = (netdev->class->get_stats
- ? netdev->class->get_stats(netdev, stats)
+ error = (netdev->netdev_class->get_stats
+ ? netdev->netdev_class->get_stats(netdev, stats)
: EOPNOTSUPP);
if (error) {
memset(stats, 0xff, sizeof *stats);
netdev_set_policing(struct netdev *netdev, uint32_t kbits_rate,
uint32_t kbits_burst)
{
- return (netdev->class->set_policing
- ? netdev->class->set_policing(netdev, kbits_rate, kbits_burst)
+ return (netdev->netdev_class->set_policing
+ ? netdev->netdev_class->set_policing(netdev,
+ kbits_rate, kbits_burst)
: EOPNOTSUPP);
}
int
netdev_get_vlan_vid(const struct netdev *netdev, int *vlan_vid)
{
- int error = (netdev->class->get_vlan_vid
- ? netdev->class->get_vlan_vid(netdev, vlan_vid)
+ int error = (netdev->netdev_class->get_vlan_vid
+ ? netdev->netdev_class->get_vlan_vid(netdev, vlan_vid)
: ENOENT);
if (error) {
*vlan_vid = 0;
return netdev;
}
\f
-/* Initializes 'netdev' as a netdev named 'name' of the specified 'class'.
+/* Initializes 'netdev_obj' as a netdev object named 'name' of the
+ * specified 'netdev_class'.
+ *
+ * This function adds 'netdev_obj' to a netdev-owned shash, so it is
+ * very important that 'netdev_obj' only be freed after calling
+ * netdev_destroy(). */
+void
+netdev_obj_init(struct netdev_obj *netdev_obj, const char *name,
+ const struct netdev_class *netdev_class, bool created)
+{
+ assert(!shash_find(&netdev_obj_shash, name));
+
+ netdev_obj->netdev_class = netdev_class;
+ netdev_obj->ref_cnt = 0;
+ netdev_obj->created = created;
+ shash_add(&netdev_obj_shash, name, netdev_obj);
+}
+
+/* Initializes 'netdev' as a netdev named 'name' of the specified
+ * 'netdev_class'.
*
* This function adds 'netdev' to a netdev-owned linked list, so it is very
* important that 'netdev' only be freed after calling netdev_close(). */
void
netdev_init(struct netdev *netdev, const char *name,
- const struct netdev_class *class)
+ const struct netdev_class *netdev_class)
{
- netdev->class = class;
+ netdev->netdev_class = netdev_class;
netdev->name = xstrdup(name);
netdev->save_flags = 0;
netdev->changed_flags = 0;
list_push_back(&netdev_list, &netdev->node);
}
+/* Returns the class type of 'netdev'.
+ *
+ * The caller must not free the returned value. */
+const char *netdev_get_type(const struct netdev *netdev)
+{
+ return netdev->netdev_class->type;
+}
+
/* Initializes 'notifier' as a netdev notifier for 'netdev', for which
* notification will consist of calling 'cb', with auxiliary data 'aux'. */
void
SHASH_FOR_EACH (node, &monitor->polled_netdevs) {
struct netdev_notifier *notifier = node->data;
- notifier->netdev->class->poll_remove(notifier);
+ notifier->netdev->netdev_class->poll_remove(notifier);
}
shash_destroy(&monitor->polled_netdevs);
const char *netdev_name = netdev_get_name(netdev);
int error = 0;
if (!shash_find(&monitor->polled_netdevs, netdev_name)
- && netdev->class->poll_add)
+ && netdev->netdev_class->poll_add)
{
struct netdev_notifier *notifier;
- error = netdev->class->poll_add(netdev, netdev_monitor_cb, monitor,
- ¬ifier);
+ error = netdev->netdev_class->poll_add(netdev, netdev_monitor_cb,
+ monitor, ¬ifier);
if (!error) {
assert(notifier->netdev == netdev);
shash_add(&monitor->polled_netdevs, netdev_name, notifier);
if (node) {
/* Cancel future notifications. */
struct netdev_notifier *notifier = node->data;
- netdev->class->poll_remove(notifier);
+ netdev->netdev_class->poll_remove(notifier);
shash_delete(&monitor->polled_netdevs, node);
/* Drop any pending notification. */
if (netdev->changed_flags) {
enum netdev_flags restore = netdev->save_flags & netdev->changed_flags;
enum netdev_flags old_flags;
- return netdev->class->update_flags(netdev,
- netdev->changed_flags & ~restore,
- restore, &old_flags);
+ return netdev->netdev_class->update_flags(netdev,
+ netdev->changed_flags
+ & ~restore,
+ restore, &old_flags);
}
return 0;
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff