/*
- * Copyright (c) 2010 Nicira Networks.
- * Distributed under the terms of the GNU GPL version 2.
+ * Copyright (c) 2007-2015 Nicira, Inc.
*
- * Significant portions of this file may be copied from parts of the Linux
- * kernel, by Linus Torvalds and others.
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
*/
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/dcache.h>
#include <linux/etherdevice.h>
#include <linux/if.h>
#include <linux/if_vlan.h>
+#include <linux/jhash.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/percpu.h>
+#include <linux/rcupdate.h>
#include <linux/rtnetlink.h>
#include <linux/compat.h>
-#include <linux/version.h>
-
+#include <linux/module.h>
+#include <linux/if_link.h>
+#include <net/net_namespace.h>
+#include <net/lisp.h>
+#include <net/gre.h>
+#include <net/geneve.h>
+#include <net/vxlan.h>
+#include <net/stt.h>
+
+#include "datapath.h"
+#include "gso.h"
#include "vport.h"
#include "vport-internal_dev.h"
-/* List of statically compiled vport implementations. Don't forget to also
- * add yours to the list at the bottom of vport.h. */
-static const struct vport_ops *base_vport_ops_list[] = {
- &netdev_vport_ops,
- &internal_vport_ops,
- &patch_vport_ops,
- &gre_vport_ops,
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
- &capwap_vport_ops,
-#endif
-};
-
-static const struct vport_ops **vport_ops_list;
-static int n_vport_types;
+static LIST_HEAD(vport_ops_list);
+/* Protected by RCU read lock for reading, ovs_mutex for writing. */
static struct hlist_head *dev_table;
#define VPORT_HASH_BUCKETS 1024
-/* Both RTNL lock and vport_mutex need to be held when updating dev_table.
- *
- * If you use vport_locate and then perform some operations, you need to hold
- * one of these locks if you don't want the vport to be deleted out from under
- * you.
- *
- * If you get a reference to a vport through a datapath, it is protected
- * by RCU and you need to hold rcu_read_lock instead when reading.
- *
- * If multiple locks are taken, the hierarchy is:
- * 1. RTNL
- * 2. DP
- * 3. vport
- */
-static DEFINE_MUTEX(vport_mutex);
-
/**
- * vport_lock - acquire vport lock
+ * ovs_vport_init - initialize vport subsystem
*
- * Acquire global vport lock. See above comment about locking requirements
- * and specific function definitions. May sleep.
+ * Called at module load time to initialize the vport subsystem.
*/
-void vport_lock(void)
-{
- mutex_lock(&vport_mutex);
-}
-
-/**
- * vport_unlock - release vport lock
- *
- * Release lock acquired with vport_lock.
- */
-void vport_unlock(void)
-{
- mutex_unlock(&vport_mutex);
-}
-
-#define ASSERT_VPORT() \
-do { \
- if (unlikely(!mutex_is_locked(&vport_mutex))) { \
- pr_err("vport lock not held at %s (%d)\n", \
- __FILE__, __LINE__); \
- dump_stack(); \
- } \
-} while (0)
-
-/**
- * vport_init - initialize vport subsystem
- *
- * Called at module load time to initialize the vport subsystem and any
- * compiled in vport types.
- */
-int vport_init(void)
+int ovs_vport_init(void)
{
int err;
- int i;
dev_table = kzalloc(VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
GFP_KERNEL);
- if (!dev_table) {
- err = -ENOMEM;
- goto error;
- }
-
- vport_ops_list = kmalloc(ARRAY_SIZE(base_vport_ops_list) *
- sizeof(struct vport_ops *), GFP_KERNEL);
- if (!vport_ops_list) {
- err = -ENOMEM;
- goto error_dev_table;
- }
-
- for (i = 0; i < ARRAY_SIZE(base_vport_ops_list); i++) {
- const struct vport_ops *new_ops = base_vport_ops_list[i];
-
- if (new_ops->init)
- err = new_ops->init();
- else
- err = 0;
-
- if (!err)
- vport_ops_list[n_vport_types++] = new_ops;
- else if (new_ops->flags & VPORT_F_REQUIRED) {
- vport_exit();
- goto error;
- }
- }
-
+ if (!dev_table)
+ return -ENOMEM;
+
+ err = lisp_init_module();
+ if (err)
+ goto err_lisp;
+ err = ipgre_init();
+ if (err)
+ goto err_gre;
+ err = geneve_init_module();
+ if (err)
+ goto err_geneve;
+
+ err = vxlan_init_module();
+ if (err)
+ goto err_vxlan;
+ err = ovs_stt_init_module();
+ if (err)
+ goto err_stt;
return 0;
-error_dev_table:
+err_stt:
+ vxlan_cleanup_module();
+err_vxlan:
+ geneve_cleanup_module();
+err_geneve:
+ ipgre_fini();
+err_gre:
+ lisp_cleanup_module();
+err_lisp:
kfree(dev_table);
-error:
return err;
}
-static void vport_del_all(void)
-{
- int i;
-
- rtnl_lock();
- vport_lock();
-
- for (i = 0; i < VPORT_HASH_BUCKETS; i++) {
- struct hlist_head *bucket = &dev_table[i];
- struct vport *vport;
- struct hlist_node *node, *next;
-
- hlist_for_each_entry_safe(vport, node, next, bucket, hash_node)
- vport_del(vport);
- }
-
- vport_unlock();
- rtnl_unlock();
-}
-
/**
- * vport_exit - shutdown vport subsystem
+ * ovs_vport_exit - shutdown vport subsystem
*
- * Called at module exit time to shutdown the vport subsystem and any
- * initialized vport types.
+ * Called at module exit time to shutdown the vport subsystem.
*/
-void vport_exit(void)
+void ovs_vport_exit(void)
{
- int i;
-
- vport_del_all();
-
- for (i = 0; i < n_vport_types; i++) {
- if (vport_ops_list[i]->exit)
- vport_ops_list[i]->exit();
- }
-
- kfree(vport_ops_list);
+ ovs_stt_cleanup_module();
+ vxlan_cleanup_module();
+ geneve_cleanup_module();
+ ipgre_fini();
+ lisp_cleanup_module();
kfree(dev_table);
}
-/**
- * vport_user_mod - modify existing vport device (for userspace callers)
- *
- * @uport: New configuration for vport
- *
- * Modifies an existing device with the specified configuration (which is
- * dependent on device type). This function is for userspace callers and
- * assumes no locks are held.
- */
-int vport_user_mod(const struct odp_port __user *uport)
-{
- struct odp_port port;
- struct vport *vport;
- int err;
-
- if (copy_from_user(&port, uport, sizeof(port)))
- return -EFAULT;
-
- port.devname[IFNAMSIZ - 1] = '\0';
-
- rtnl_lock();
-
- vport = vport_locate(port.devname);
- if (!vport) {
- err = -ENODEV;
- goto out;
- }
-
- vport_lock();
- err = vport_mod(vport, &port);
- vport_unlock();
-
-out:
- rtnl_unlock();
- return err;
-}
-
-/**
- * vport_user_stats_get - retrieve device stats (for userspace callers)
- *
- * @ustats_req: Stats request parameters.
- *
- * Retrieves transmit, receive, and error stats for the given device. This
- * function is for userspace callers and assumes no locks are held.
- */
-int vport_user_stats_get(struct odp_vport_stats_req __user *ustats_req)
-{
- struct odp_vport_stats_req stats_req;
- struct vport *vport;
- int err;
-
- if (copy_from_user(&stats_req, ustats_req, sizeof(struct odp_vport_stats_req)))
- return -EFAULT;
-
- stats_req.devname[IFNAMSIZ - 1] = '\0';
-
- vport_lock();
-
- vport = vport_locate(stats_req.devname);
- if (!vport) {
- err = -ENODEV;
- goto out;
- }
-
- err = vport_get_stats(vport, &stats_req.stats);
-
-out:
- vport_unlock();
-
- if (!err)
- if (copy_to_user(ustats_req, &stats_req, sizeof(struct odp_vport_stats_req)))
- err = -EFAULT;
-
- return err;
-}
-
-/**
- * vport_user_stats_set - sets offset device stats (for userspace callers)
- *
- * @ustats_req: Stats set parameters.
- *
- * Provides a set of transmit, receive, and error stats to be added as an
- * offset to the collect data when stats are retreived. Some devices may not
- * support setting the stats, in which case the result will always be
- * -EOPNOTSUPP. This function is for userspace callers and assumes no locks
- * are held.
- */
-int vport_user_stats_set(struct odp_vport_stats_req __user *ustats_req)
-{
- struct odp_vport_stats_req stats_req;
- struct vport *vport;
- int err;
-
- if (copy_from_user(&stats_req, ustats_req, sizeof(struct odp_vport_stats_req)))
- return -EFAULT;
-
- stats_req.devname[IFNAMSIZ - 1] = '\0';
-
- rtnl_lock();
- vport_lock();
-
- vport = vport_locate(stats_req.devname);
- if (!vport) {
- err = -ENODEV;
- goto out;
- }
-
- err = vport_set_stats(vport, &stats_req.stats);
-
-out:
- vport_unlock();
- rtnl_unlock();
- return err;
-}
-
-
-/**
- * vport_user_ether_get - retrieve device Ethernet address (for userspace callers)
- *
- * @uvport_ether: Ethernet address request parameters.
- *
- * Retrieves the Ethernet address of the given device. This function is for
- * userspace callers and assumes no locks are held.
- */
-int vport_user_ether_get(struct odp_vport_ether __user *uvport_ether)
+static struct hlist_head *hash_bucket(const struct net *net, const char *name)
{
- struct odp_vport_ether vport_ether;
- struct vport *vport;
- int err = 0;
-
- if (copy_from_user(&vport_ether, uvport_ether, sizeof(struct odp_vport_ether)))
- return -EFAULT;
-
- vport_ether.devname[IFNAMSIZ - 1] = '\0';
-
- vport_lock();
-
- vport = vport_locate(vport_ether.devname);
- if (!vport) {
- err = -ENODEV;
- goto out;
- }
-
- rcu_read_lock();
- memcpy(vport_ether.ether_addr, vport_get_addr(vport), ETH_ALEN);
- rcu_read_unlock();
-
-out:
- vport_unlock();
-
- if (!err)
- if (copy_to_user(uvport_ether, &vport_ether, sizeof(struct odp_vport_ether)))
- err = -EFAULT;
-
- return err;
-}
-
-/**
- * vport_user_ether_set - set device Ethernet address (for userspace callers)
- *
- * @uvport_ether: Ethernet address request parameters.
- *
- * Sets the Ethernet address of the given device. Some devices may not support
- * setting the Ethernet address, in which case the result will always be
- * -EOPNOTSUPP. This function is for userspace callers and assumes no locks
- * are held.
- */
-int vport_user_ether_set(struct odp_vport_ether __user *uvport_ether)
-{
- struct odp_vport_ether vport_ether;
- struct vport *vport;
- int err;
-
- if (copy_from_user(&vport_ether, uvport_ether, sizeof(struct odp_vport_ether)))
- return -EFAULT;
-
- vport_ether.devname[IFNAMSIZ - 1] = '\0';
-
- rtnl_lock();
- vport_lock();
-
- vport = vport_locate(vport_ether.devname);
- if (!vport) {
- err = -ENODEV;
- goto out;
- }
-
- err = vport_set_addr(vport, vport_ether.ether_addr);
-
-out:
- vport_unlock();
- rtnl_unlock();
- return err;
-}
-
-/**
- * vport_user_mtu_get - retrieve device MTU (for userspace callers)
- *
- * @uvport_mtu: MTU request parameters.
- *
- * Retrieves the MTU of the given device. This function is for userspace
- * callers and assumes no locks are held.
- */
-int vport_user_mtu_get(struct odp_vport_mtu __user *uvport_mtu)
-{
- struct odp_vport_mtu vport_mtu;
- struct vport *vport;
- int err = 0;
-
- if (copy_from_user(&vport_mtu, uvport_mtu, sizeof(struct odp_vport_mtu)))
- return -EFAULT;
-
- vport_mtu.devname[IFNAMSIZ - 1] = '\0';
-
- vport_lock();
-
- vport = vport_locate(vport_mtu.devname);
- if (!vport) {
- err = -ENODEV;
- goto out;
- }
-
- vport_mtu.mtu = vport_get_mtu(vport);
-
-out:
- vport_unlock();
-
- if (!err)
- if (copy_to_user(uvport_mtu, &vport_mtu, sizeof(struct odp_vport_mtu)))
- err = -EFAULT;
-
- return err;
+ unsigned int hash = jhash(name, strlen(name), (unsigned long) net);
+ return &dev_table[hash & (VPORT_HASH_BUCKETS - 1)];
}
-/**
- * vport_user_mtu_set - set device MTU (for userspace callers)
- *
- * @uvport_mtu: MTU request parameters.
- *
- * Sets the MTU of the given device. Some devices may not support setting the
- * MTU, in which case the result will always be -EOPNOTSUPP. This function is
- * for userspace callers and assumes no locks are held.
- */
-int vport_user_mtu_set(struct odp_vport_mtu __user *uvport_mtu)
+int __ovs_vport_ops_register(struct vport_ops *ops)
{
- struct odp_vport_mtu vport_mtu;
- struct vport *vport;
- int err;
-
- if (copy_from_user(&vport_mtu, uvport_mtu, sizeof(struct odp_vport_mtu)))
- return -EFAULT;
-
- vport_mtu.devname[IFNAMSIZ - 1] = '\0';
+ int err = -EEXIST;
+ struct vport_ops *o;
- rtnl_lock();
- vport_lock();
+ ovs_lock();
+ list_for_each_entry(o, &vport_ops_list, list)
+ if (ops->type == o->type)
+ goto errout;
- vport = vport_locate(vport_mtu.devname);
- if (!vport) {
- err = -ENODEV;
- goto out;
- }
-
- err = vport_set_mtu(vport, vport_mtu.mtu);
-
-out:
- vport_unlock();
- rtnl_unlock();
+ list_add_tail(&ops->list, &vport_ops_list);
+ err = 0;
+errout:
+ ovs_unlock();
return err;
}
+EXPORT_SYMBOL_GPL(__ovs_vport_ops_register);
-static struct hlist_head *hash_bucket(const char *name)
+void ovs_vport_ops_unregister(struct vport_ops *ops)
{
- unsigned int hash = full_name_hash(name, strlen(name));
- return &dev_table[hash & (VPORT_HASH_BUCKETS - 1)];
+ ovs_lock();
+ list_del(&ops->list);
+ ovs_unlock();
}
+EXPORT_SYMBOL_GPL(ovs_vport_ops_unregister);
/**
- * vport_locate - find a port that has already been created
+ * ovs_vport_locate - find a port that has already been created
*
* @name: name of port to find
*
- * Either RTNL or vport lock must be acquired before calling this function
- * and held while using the found port. See the locking comments at the
- * top of the file.
+ * Must be called with ovs or RCU read lock.
*/
-struct vport *vport_locate(const char *name)
+struct vport *ovs_vport_locate(const struct net *net, const char *name)
{
- struct hlist_head *bucket = hash_bucket(name);
+ struct hlist_head *bucket = hash_bucket(net, name);
struct vport *vport;
- struct hlist_node *node;
- if (unlikely(!mutex_is_locked(&vport_mutex) && !rtnl_is_locked())) {
- pr_err("neither RTNL nor vport lock held in vport_locate\n");
- dump_stack();
- }
-
- rcu_read_lock();
-
- hlist_for_each_entry(vport, node, bucket, hash_node)
- if (!strcmp(name, vport_get_name(vport)))
- goto out;
-
- vport = NULL;
-
-out:
- rcu_read_unlock();
- return vport;
-}
-
-static void register_vport(struct vport *vport)
-{
- hlist_add_head(&vport->hash_node, hash_bucket(vport_get_name(vport)));
-}
-
-static void unregister_vport(struct vport *vport)
-{
- hlist_del(&vport->hash_node);
-}
+ hlist_for_each_entry_rcu(vport, bucket, hash_node)
+ if (!strcmp(name, ovs_vport_name(vport)) &&
+ net_eq(ovs_dp_get_net(vport->dp), net))
+ return vport;
-static void release_vport(struct kobject *kobj)
-{
- struct vport *p = container_of(kobj, struct vport, kobj);
- kfree(p);
+ return NULL;
}
-static struct kobj_type brport_ktype = {
-#ifdef CONFIG_SYSFS
- .sysfs_ops = &brport_sysfs_ops,
-#endif
- .release = release_vport
-};
-
/**
- * vport_alloc - allocate and initialize new vport
+ * ovs_vport_alloc - allocate and initialize new vport
*
* @priv_size: Size of private data area to allocate.
* @ops: vport device ops
* vport_priv(). vports that are no longer needed should be released with
* vport_free().
*/
-struct vport *vport_alloc(int priv_size, const struct vport_ops *ops, const struct vport_parms *parms)
+struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops,
+ const struct vport_parms *parms)
{
struct vport *vport;
size_t alloc_size;
vport->dp = parms->dp;
vport->port_no = parms->port_no;
- atomic_set(&vport->sflow_pool, 0);
vport->ops = ops;
+ INIT_HLIST_NODE(&vport->dp_hash_node);
- /* Initialize kobject for bridge. This will be added as
- * /sys/class/net/<devname>/brport later, if sysfs is enabled. */
- vport->kobj.kset = NULL;
- kobject_init(&vport->kobj, &brport_ktype);
-
- if (vport->ops->flags & VPORT_F_GEN_STATS) {
- vport->percpu_stats = alloc_percpu(struct vport_percpu_stats);
- if (!vport->percpu_stats)
- return ERR_PTR(-ENOMEM);
-
- spin_lock_init(&vport->stats_lock);
+ if (ovs_vport_set_upcall_portids(vport, parms->upcall_portids)) {
+ kfree(vport);
+ return ERR_PTR(-EINVAL);
}
return vport;
}
+EXPORT_SYMBOL_GPL(ovs_vport_alloc);
/**
- * vport_free - uninitialize and free vport
+ * ovs_vport_free - uninitialize and free vport
*
* @vport: vport to free
*
* Frees a vport allocated with vport_alloc() when it is no longer needed.
+ *
+ * The caller must ensure that an RCU grace period has passed since the last
+ * time @vport was in a datapath.
*/
-void vport_free(struct vport *vport)
+void ovs_vport_free(struct vport *vport)
+{
+ /* vport is freed from RCU callback or error path, Therefore
+ * it is safe to use raw dereference.
+ */
+ kfree(rcu_dereference_raw(vport->upcall_portids));
+ kfree(vport);
+}
+EXPORT_SYMBOL_GPL(ovs_vport_free);
+
+static struct vport_ops *ovs_vport_lookup(const struct vport_parms *parms)
{
- if (vport->ops->flags & VPORT_F_GEN_STATS)
- free_percpu(vport->percpu_stats);
+ struct vport_ops *ops;
- kobject_put(&vport->kobj);
+ list_for_each_entry(ops, &vport_ops_list, list)
+ if (ops->type == parms->type)
+ return ops;
+
+ return NULL;
}
/**
- * vport_add - add vport device (for kernel callers)
+ * ovs_vport_add - add vport device (for kernel callers)
*
* @parms: Information about new vport.
*
* Creates a new vport with the specified configuration (which is dependent on
- * device type) and attaches it to a datapath. Both RTNL and vport locks must
- * be held.
+ * device type). ovs_mutex must be held.
*/
-struct vport *vport_add(const struct vport_parms *parms)
+struct vport *ovs_vport_add(const struct vport_parms *parms)
{
+ struct vport_ops *ops;
struct vport *vport;
- int err = 0;
- int i;
- ASSERT_RTNL();
- ASSERT_VPORT();
+ ops = ovs_vport_lookup(parms);
+ if (ops) {
+ struct hlist_head *bucket;
- for (i = 0; i < n_vport_types; i++) {
- if (!strcmp(vport_ops_list[i]->type, parms->type)) {
- vport = vport_ops_list[i]->create(parms);
- if (IS_ERR(vport)) {
- err = PTR_ERR(vport);
- goto out;
- }
+ if (!try_module_get(ops->owner))
+ return ERR_PTR(-EAFNOSUPPORT);
- register_vport(vport);
+ vport = ops->create(parms);
+ if (IS_ERR(vport)) {
+ module_put(ops->owner);
return vport;
}
+
+ bucket = hash_bucket(ovs_dp_get_net(vport->dp),
+ ovs_vport_name(vport));
+ hlist_add_head_rcu(&vport->hash_node, bucket);
+ return vport;
}
- err = -EAFNOSUPPORT;
+ /* Unlock to attempt module load and return -EAGAIN if load
+ * was successful as we need to restart the port addition
+ * workflow.
+ */
+ ovs_unlock();
+ request_module("vport-type-%d", parms->type);
+ ovs_lock();
-out:
- return ERR_PTR(err);
+ if (!ovs_vport_lookup(parms))
+ return ERR_PTR(-EAFNOSUPPORT);
+ else
+ return ERR_PTR(-EAGAIN);
}
/**
- * vport_mod - modify existing vport device (for kernel callers)
+ * ovs_vport_set_options - modify existing vport device (for kernel callers)
*
* @vport: vport to modify.
- * @port: New configuration.
+ * @options: New configuration.
*
* Modifies an existing device with the specified configuration (which is
- * dependent on device type). Both RTNL and vport locks must be held.
+ * dependent on device type). ovs_mutex must be held.
*/
-int vport_mod(struct vport *vport, struct odp_port *port)
+int ovs_vport_set_options(struct vport *vport, struct nlattr *options)
{
- ASSERT_RTNL();
- ASSERT_VPORT();
-
- if (vport->ops->modify)
- return vport->ops->modify(vport, port);
- else
+ if (!vport->ops->set_options)
return -EOPNOTSUPP;
+ return vport->ops->set_options(vport, options);
}
/**
- * vport_del - delete existing vport device (for kernel callers)
+ * ovs_vport_del - delete existing vport device
*
* @vport: vport to delete.
*
- * Detaches @vport from its datapath and destroys it. It is possible to fail
- * for reasons such as lack of memory. Both RTNL and vport locks must be held.
+ * Detaches @vport from its datapath and destroys it. ovs_mutex must be
+ * held.
*/
-int vport_del(struct vport *vport)
+void ovs_vport_del(struct vport *vport)
{
- ASSERT_RTNL();
- ASSERT_VPORT();
+ ASSERT_OVSL();
- unregister_vport(vport);
-
- return vport->ops->destroy(vport);
+ hlist_del_rcu(&vport->hash_node);
+ module_put(vport->ops->owner);
+ vport->ops->destroy(vport);
}
/**
- * vport_set_mtu - set device MTU (for kernel callers)
+ * ovs_vport_get_stats - retrieve device stats
*
- * @vport: vport on which to set MTU.
- * @mtu: New MTU.
+ * @vport: vport from which to retrieve the stats
+ * @stats: location to store stats
+ *
+ * Retrieves transmit, receive, and error stats for the given device.
*
- * Sets the MTU of the given device. Some devices may not support setting the
- * MTU, in which case the result will always be -EOPNOTSUPP. RTNL lock must
- * be held.
+ * Must be called with ovs_mutex or rcu_read_lock.
*/
-int vport_set_mtu(struct vport *vport, int mtu)
+void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats)
{
- ASSERT_RTNL();
+ const struct rtnl_link_stats64 *dev_stats;
+ struct rtnl_link_stats64 temp;
- if (mtu < 68)
- return -EINVAL;
-
- if (vport->ops->set_mtu) {
- int ret;
-
- ret = vport->ops->set_mtu(vport, mtu);
+ dev_stats = dev_get_stats(vport->dev, &temp);
+ stats->rx_errors = dev_stats->rx_errors;
+ stats->tx_errors = dev_stats->tx_errors;
+ stats->tx_dropped = dev_stats->tx_dropped;
+ stats->rx_dropped = dev_stats->rx_dropped;
- if (!ret && !is_internal_vport(vport))
- set_internal_devs_mtu(vport->dp);
-
- return ret;
- } else
- return -EOPNOTSUPP;
+ stats->rx_bytes = dev_stats->rx_bytes;
+ stats->rx_packets = dev_stats->rx_packets;
+ stats->tx_bytes = dev_stats->tx_bytes;
+ stats->tx_packets = dev_stats->tx_packets;
}
/**
- * vport_set_addr - set device Ethernet address (for kernel callers)
+ * ovs_vport_get_options - retrieve device options
*
- * @vport: vport on which to set Ethernet address.
- * @addr: New address.
+ * @vport: vport from which to retrieve the options.
+ * @skb: sk_buff where options should be appended.
*
- * Sets the Ethernet address of the given device. Some devices may not support
- * setting the Ethernet address, in which case the result will always be
- * -EOPNOTSUPP. RTNL lock must be held.
- */
-int vport_set_addr(struct vport *vport, const unsigned char *addr)
-{
- ASSERT_RTNL();
-
- if (!is_valid_ether_addr(addr))
- return -EADDRNOTAVAIL;
-
- if (vport->ops->set_addr)
- return vport->ops->set_addr(vport, addr);
- else
- return -EOPNOTSUPP;
-}
-
-/**
- * vport_set_stats - sets offset device stats (for kernel callers)
+ * Retrieves the configuration of the given device, appending an
+ * %OVS_VPORT_ATTR_OPTIONS attribute that in turn contains nested
+ * vport-specific attributes to @skb.
*
- * @vport: vport on which to set stats
- * @stats: stats to set
+ * Returns 0 if successful, -EMSGSIZE if @skb has insufficient room, or another
+ * negative error code if a real error occurred. If an error occurs, @skb is
+ * left unmodified.
*
- * Provides a set of transmit, receive, and error stats to be added as an
- * offset to the collect data when stats are retreived. Some devices may not
- * support setting the stats, in which case the result will always be
- * -EOPNOTSUPP. RTNL lock must be held.
+ * Must be called with ovs_mutex or rcu_read_lock.
*/
-int vport_set_stats(struct vport *vport, struct rtnl_link_stats64 *stats)
+int ovs_vport_get_options(const struct vport *vport, struct sk_buff *skb)
{
- ASSERT_RTNL();
-
- if (vport->ops->flags & VPORT_F_GEN_STATS) {
- spin_lock_bh(&vport->stats_lock);
- vport->offset_stats = *stats;
- spin_unlock_bh(&vport->stats_lock);
+ struct nlattr *nla;
+ int err;
+ if (!vport->ops->get_options)
return 0;
- } else if (vport->ops->set_stats)
- return vport->ops->set_stats(vport, stats);
- else
- return -EOPNOTSUPP;
-}
-/**
- * vport_get_name - retrieve device name
- *
- * @vport: vport from which to retrieve the name.
- *
- * Retrieves the name of the given device. Either RTNL lock or rcu_read_lock
- * must be held for the entire duration that the name is in use.
- */
-const char *vport_get_name(const struct vport *vport)
-{
- return vport->ops->get_name(vport);
-}
+ nla = nla_nest_start(skb, OVS_VPORT_ATTR_OPTIONS);
+ if (!nla)
+ return -EMSGSIZE;
-/**
- * vport_get_type - retrieve device type
- *
- * @vport: vport from which to retrieve the type.
- *
- * Retrieves the type of the given device. Either RTNL lock or rcu_read_lock
- * must be held for the entire duration that the type is in use.
- */
-const char *vport_get_type(const struct vport *vport)
-{
- return vport->ops->type;
+ err = vport->ops->get_options(vport, skb);
+ if (err) {
+ nla_nest_cancel(skb, nla);
+ return err;
+ }
+
+ nla_nest_end(skb, nla);
+ return 0;
}
-/**
- * vport_get_addr - retrieve device Ethernet address (for kernel callers)
- *
- * @vport: vport from which to retrieve the Ethernet address.
- *
- * Retrieves the Ethernet address of the given device. Either RTNL lock or
- * rcu_read_lock must be held for the entire duration that the Ethernet address
- * is in use.
- */
-const unsigned char *vport_get_addr(const struct vport *vport)
+static void vport_portids_destroy_rcu_cb(struct rcu_head *rcu)
{
- return vport->ops->get_addr(vport);
+ struct vport_portids *ids = container_of(rcu, struct vport_portids,
+ rcu);
+
+ kfree(ids);
}
/**
- * vport_get_kobj - retrieve associated kobj
+ * ovs_vport_set_upcall_portids - set upcall portids of @vport.
*
- * @vport: vport from which to retrieve the associated kobj
+ * @vport: vport to modify.
+ * @ids: new configuration, an array of port ids.
*
- * Retrieves the associated kobj or null if no kobj. The returned kobj is
- * valid for as long as the vport exists.
- */
-struct kobject *vport_get_kobj(const struct vport *vport)
-{
- if (vport->ops->get_kobj)
- return vport->ops->get_kobj(vport);
- else
- return NULL;
-}
-
-/**
- * vport_get_stats - retrieve device stats (for kernel callers)
+ * Sets the vport's upcall_portids to @ids.
*
- * @vport: vport from which to retrieve the stats
- * @stats: location to store stats
+ * Returns 0 if successful, -EINVAL if @ids is zero length or cannot be parsed
+ * as an array of U32.
*
- * Retrieves transmit, receive, and error stats for the given device.
+ * Must be called with ovs_mutex.
*/
-int vport_get_stats(struct vport *vport, struct rtnl_link_stats64 *stats)
+int ovs_vport_set_upcall_portids(struct vport *vport, const struct nlattr *ids)
{
- struct rtnl_link_stats64 dev_stats;
- struct rtnl_link_stats64 *dev_statsp = NULL;
- int err;
-
- if (vport->ops->get_stats) {
- if (vport->ops->flags & VPORT_F_GEN_STATS)
- dev_statsp = &dev_stats;
- else
- dev_statsp = stats;
+ struct vport_portids *old, *vport_portids;
- rcu_read_lock();
- err = vport->ops->get_stats(vport, dev_statsp);
- rcu_read_unlock();
-
- if (err)
- goto out;
- }
-
- if (vport->ops->flags & VPORT_F_GEN_STATS) {
- int i;
-
- /* We potentially have 3 sources of stats that need to be
- * combined: those we have collected (split into err_stats and
- * percpu_stats), offset_stats from set_stats(), and device
- * error stats from get_stats() (for errors that happen
- * downstream and therefore aren't reported through our
- * vport_record_error() function). */
-
- spin_lock_bh(&vport->stats_lock);
-
- *stats = vport->offset_stats;
-
- stats->rx_errors += vport->err_stats.rx_errors;
- stats->tx_errors += vport->err_stats.tx_errors;
- stats->tx_dropped += vport->err_stats.tx_dropped;
- stats->rx_dropped += vport->err_stats.rx_dropped;
-
- spin_unlock_bh(&vport->stats_lock);
-
- if (dev_statsp) {
- stats->rx_packets += dev_statsp->rx_packets;
- stats->tx_packets += dev_statsp->tx_packets;
- stats->rx_bytes += dev_statsp->rx_bytes;
- stats->tx_bytes += dev_statsp->tx_bytes;
- stats->rx_errors += dev_statsp->rx_errors;
- stats->tx_errors += dev_statsp->tx_errors;
- stats->rx_dropped += dev_statsp->rx_dropped;
- stats->tx_dropped += dev_statsp->tx_dropped;
- stats->multicast += dev_statsp->multicast;
- stats->collisions += dev_statsp->collisions;
- stats->rx_length_errors += dev_statsp->rx_length_errors;
- stats->rx_over_errors += dev_statsp->rx_over_errors;
- stats->rx_crc_errors += dev_statsp->rx_crc_errors;
- stats->rx_frame_errors += dev_statsp->rx_frame_errors;
- stats->rx_fifo_errors += dev_statsp->rx_fifo_errors;
- stats->rx_missed_errors += dev_statsp->rx_missed_errors;
- stats->tx_aborted_errors += dev_statsp->tx_aborted_errors;
- stats->tx_carrier_errors += dev_statsp->tx_carrier_errors;
- stats->tx_fifo_errors += dev_statsp->tx_fifo_errors;
- stats->tx_heartbeat_errors += dev_statsp->tx_heartbeat_errors;
- stats->tx_window_errors += dev_statsp->tx_window_errors;
- stats->rx_compressed += dev_statsp->rx_compressed;
- stats->tx_compressed += dev_statsp->tx_compressed;
- }
-
- for_each_possible_cpu(i) {
- const struct vport_percpu_stats *percpu_stats;
- struct vport_percpu_stats local_stats;
- unsigned seqcount;
-
- percpu_stats = per_cpu_ptr(vport->percpu_stats, i);
+ if (!nla_len(ids) || nla_len(ids) % sizeof(u32))
+ return -EINVAL;
- do {
- seqcount = read_seqcount_begin(&percpu_stats->seqlock);
- local_stats = *percpu_stats;
- } while (read_seqcount_retry(&percpu_stats->seqlock, seqcount));
+ old = ovsl_dereference(vport->upcall_portids);
- stats->rx_bytes += local_stats.rx_bytes;
- stats->rx_packets += local_stats.rx_packets;
- stats->tx_bytes += local_stats.tx_bytes;
- stats->tx_packets += local_stats.tx_packets;
- }
+ vport_portids = kmalloc(sizeof(*vport_portids) + nla_len(ids),
+ GFP_KERNEL);
+ if (!vport_portids)
+ return -ENOMEM;
- err = 0;
- } else
- err = -EOPNOTSUPP;
+ vport_portids->n_ids = nla_len(ids) / sizeof(u32);
+ vport_portids->rn_ids = reciprocal_value(vport_portids->n_ids);
+ nla_memcpy(vport_portids->ids, ids, nla_len(ids));
-out:
- return err;
-}
+ rcu_assign_pointer(vport->upcall_portids, vport_portids);
-/**
- * vport_get_flags - retrieve device flags
- *
- * @vport: vport from which to retrieve the flags
- *
- * Retrieves the flags of the given device. Either RTNL lock or rcu_read_lock
- * must be held.
- */
-unsigned vport_get_flags(const struct vport *vport)
-{
- return vport->ops->get_dev_flags(vport);
+ if (old)
+ call_rcu(&old->rcu, vport_portids_destroy_rcu_cb);
+ return 0;
}
/**
- * vport_get_flags - check whether device is running
- *
- * @vport: vport on which to check status.
+ * ovs_vport_get_upcall_portids - get the upcall_portids of @vport.
*
- * Checks whether the given device is running. Either RTNL lock or
- * rcu_read_lock must be held.
- */
-int vport_is_running(const struct vport *vport)
-{
- return vport->ops->is_running(vport);
-}
-
-/**
- * vport_get_flags - retrieve device operating state
+ * @vport: vport from which to retrieve the portids.
+ * @skb: sk_buff where portids should be appended.
*
- * @vport: vport from which to check status
+ * Retrieves the configuration of the given vport, appending the
+ * %OVS_VPORT_ATTR_UPCALL_PID attribute which is the array of upcall
+ * portids to @skb.
*
- * Retrieves the RFC2863 operstate of the given device. Either RTNL lock or
- * rcu_read_lock must be held.
+ * Returns 0 if successful, -EMSGSIZE if @skb has insufficient room.
+ * If an error occurs, @skb is left unmodified. Must be called with
+ * ovs_mutex or rcu_read_lock.
*/
-unsigned char vport_get_operstate(const struct vport *vport)
+int ovs_vport_get_upcall_portids(const struct vport *vport,
+ struct sk_buff *skb)
{
- return vport->ops->get_operstate(vport);
-}
+ struct vport_portids *ids;
-/**
- * vport_get_ifindex - retrieve device system interface index
- *
- * @vport: vport from which to retrieve index
- *
- * Retrieves the system interface index of the given device. Not all devices
- * will have system indexes, in which case the index of the datapath local
- * port is returned. Returns a negative index on error. Either RTNL lock or
- * rcu_read_lock must be held.
- */
-int vport_get_ifindex(const struct vport *vport)
-{
- if (vport->ops->get_ifindex)
- return vport->ops->get_ifindex(vport);
+ ids = rcu_dereference_ovsl(vport->upcall_portids);
- /* If we don't actually have an ifindex, use the local port's.
- * Userspace doesn't check it anyways. */
- return vport_get_ifindex(vport->dp->ports[ODPP_LOCAL]);
+ if (vport->dp->user_features & OVS_DP_F_VPORT_PIDS)
+ return nla_put(skb, OVS_VPORT_ATTR_UPCALL_PID,
+ ids->n_ids * sizeof(u32), (void *)ids->ids);
+ else
+ return nla_put_u32(skb, OVS_VPORT_ATTR_UPCALL_PID, ids->ids[0]);
}
/**
- * vport_get_iflink - retrieve device system link index
+ * ovs_vport_find_upcall_portid - find the upcall portid to send upcall.
+ *
+ * @vport: vport from which the missed packet is received.
+ * @skb: skb that the missed packet was received.
*
- * @vport: vport from which to retrieve index
+ * Uses the skb_get_hash() to select the upcall portid to send the
+ * upcall.
*
- * Retrieves the system link index of the given device. The link is the index
- * of the interface on which the packet will actually be sent. In most cases
- * this is the same as the ifindex but may be different for tunnel devices.
- * Returns a negative index on error. Either RTNL lock or rcu_read_lock must
- * be held.
+ * Returns the portid of the target socket. Must be called with rcu_read_lock.
*/
-int vport_get_iflink(const struct vport *vport)
+u32 ovs_vport_find_upcall_portid(const struct vport *vport, struct sk_buff *skb)
{
- if (vport->ops->get_iflink)
- return vport->ops->get_iflink(vport);
+ struct vport_portids *ids;
+ u32 ids_index;
+ u32 hash;
- /* If we don't have an iflink, use the ifindex. In most cases they
- * are the same. */
- return vport_get_ifindex(vport);
-}
+ ids = rcu_dereference(vport->upcall_portids);
-/**
- * vport_get_mtu - retrieve device MTU (for kernel callers)
- *
- * @vport: vport from which to retrieve MTU
- *
- * Retrieves the MTU of the given device. Either RTNL lock or rcu_read_lock
- * must be held.
- */
-int vport_get_mtu(const struct vport *vport)
-{
- return vport->ops->get_mtu(vport);
+ if (ids->n_ids == 1 && ids->ids[0] == 0)
+ return 0;
+
+ hash = skb_get_hash(skb);
+ ids_index = hash - ids->n_ids * reciprocal_divide(hash, ids->rn_ids);
+ return ids->ids[ids_index];
}
/**
- * vport_receive - pass up received packet to the datapath for processing
+ * ovs_vport_receive - pass up received packet to the datapath for processing
*
* @vport: vport that received the packet
* @skb: skb that was received
+ * @tun_key: tunnel (if any) that carried packet
*
* Must be called with rcu_read_lock. The packet cannot be shared and
- * skb->data should point to the Ethernet header. The caller must have already
- * called compute_ip_summed() to initialize the checksumming fields.
+ * skb->data should point to the Ethernet header.
*/
-void vport_receive(struct vport *vport, struct sk_buff *skb)
+int ovs_vport_receive(struct vport *vport, struct sk_buff *skb,
+ const struct ip_tunnel_info *tun_info)
{
- if (vport->ops->flags & VPORT_F_GEN_STATS) {
- struct vport_percpu_stats *stats;
+ struct sw_flow_key key;
+ int error;
- local_bh_disable();
- stats = per_cpu_ptr(vport->percpu_stats, smp_processor_id());
+ OVS_CB(skb)->input_vport = vport;
+ OVS_CB(skb)->mru = 0;
+ if (unlikely(dev_net(skb->dev) != ovs_dp_get_net(vport->dp))) {
+ u32 mark;
- write_seqcount_begin(&stats->seqlock);
- stats->rx_packets++;
- stats->rx_bytes += skb->len;
- write_seqcount_end(&stats->seqlock);
-
- local_bh_enable();
+ mark = skb->mark;
+ skb_scrub_packet(skb, true);
+ skb->mark = mark;
+ tun_info = NULL;
}
- if (!(vport->ops->flags & VPORT_F_FLOW))
- OVS_CB(skb)->flow = NULL;
-
- if (!(vport->ops->flags & VPORT_F_TUN_ID))
- OVS_CB(skb)->tun_id = 0;
-
- dp_process_received_packet(vport, skb);
+ ovs_skb_init_inner_protocol(skb);
+ skb_clear_ovs_gso_cb(skb);
+ /* Extract flow from 'skb' into 'key'. */
+ error = ovs_flow_key_extract(tun_info, skb, &key);
+ if (unlikely(error)) {
+ kfree_skb(skb);
+ return error;
+ }
+ ovs_dp_process_packet(skb, &key);
+ return 0;
}
+EXPORT_SYMBOL_GPL(ovs_vport_receive);
-static inline unsigned packet_length(const struct sk_buff *skb)
+static void free_vport_rcu(struct rcu_head *rcu)
{
- unsigned length = skb->len - ETH_HLEN;
-
- if (skb->protocol == htons(ETH_P_8021Q))
- length -= VLAN_HLEN;
+ struct vport *vport = container_of(rcu, struct vport, rcu);
- return length;
+ ovs_vport_free(vport);
}
-/**
- * vport_send - send a packet on a device
- *
- * @vport: vport on which to send the packet
- * @skb: skb to send
- *
- * Sends the given packet and returns the length of data sent. Either RTNL
- * lock or rcu_read_lock must be held.
- */
-int vport_send(struct vport *vport, struct sk_buff *skb)
+void ovs_vport_deferred_free(struct vport *vport)
{
- int mtu;
- int sent;
-
- mtu = vport_get_mtu(vport);
- if (unlikely(packet_length(skb) > mtu && !skb_is_gso(skb))) {
- if (net_ratelimit())
- pr_warn("%s: dropped over-mtu packet: %d > %d\n",
- dp_name(vport->dp), packet_length(skb), mtu);
- goto error;
- }
-
- sent = vport->ops->send(vport, skb);
-
- if (vport->ops->flags & VPORT_F_GEN_STATS && sent > 0) {
- struct vport_percpu_stats *stats;
-
- local_bh_disable();
- stats = per_cpu_ptr(vport->percpu_stats, smp_processor_id());
+ if (!vport)
+ return;
- write_seqcount_begin(&stats->seqlock);
- stats->tx_packets++;
- stats->tx_bytes += sent;
- write_seqcount_end(&stats->seqlock);
+ call_rcu(&vport->rcu, free_vport_rcu);
+}
+EXPORT_SYMBOL_GPL(ovs_vport_deferred_free);
- local_bh_enable();
- }
+int ovs_tunnel_get_egress_info(struct dp_upcall_info *upcall,
+ struct net *net,
+ struct sk_buff *skb,
+ u8 ipproto,
+ __be16 tp_src,
+ __be16 tp_dst)
+{
+ struct ip_tunnel_info *egress_tun_info = upcall->egress_tun_info;
+ struct ip_tunnel_info *tun_info = skb_tunnel_info(skb);
+ const struct ip_tunnel_key *tun_key;
+ u32 skb_mark = skb->mark;
+ struct rtable *rt;
+ struct flowi4 fl;
- return sent;
+ if (unlikely(!tun_info))
+ return -EINVAL;
+ if (ip_tunnel_info_af(tun_info) != AF_INET)
+ return -EINVAL;
-error:
- kfree_skb(skb);
- vport_record_error(vport, VPORT_E_TX_DROPPED);
+ tun_key = &tun_info->key;
+
+ /* Route lookup to get srouce IP address.
+ * The process may need to be changed if the corresponding process
+ * in vports ops changed.
+ */
+ rt = ovs_tunnel_route_lookup(net, tun_key, skb_mark, &fl, ipproto);
+ if (IS_ERR(rt))
+ return PTR_ERR(rt);
+
+ ip_rt_put(rt);
+
+ /* Generate egress_tun_info based on tun_info,
+ * saddr, tp_src and tp_dst
+ */
+ ip_tunnel_key_init(&egress_tun_info->key,
+ fl.saddr, tun_key->u.ipv4.dst,
+ tun_key->tos,
+ tun_key->ttl,
+ tp_src, tp_dst,
+ tun_key->tun_id,
+ tun_key->tun_flags);
+ egress_tun_info->options_len = tun_info->options_len;
+ egress_tun_info->mode = tun_info->mode;
+ upcall->egress_tun_opts = ip_tunnel_info_opts(tun_info);
return 0;
}
+EXPORT_SYMBOL_GPL(ovs_tunnel_get_egress_info);
-/**
- * vport_record_error - indicate device error to generic stats layer
- *
- * @vport: vport that encountered the error
- * @err_type: one of enum vport_err_type types to indicate the error type
- *
- * If using the vport generic stats layer indicate that an error of the given
- * type has occured.
- */
-void vport_record_error(struct vport *vport, enum vport_err_type err_type)
+int ovs_vport_get_egress_tun_info(struct vport *vport, struct sk_buff *skb,
+ struct dp_upcall_info *upcall)
{
- if (vport->ops->flags & VPORT_F_GEN_STATS) {
+ /* get_egress_tun_info() is only implemented on tunnel ports. */
+ if (unlikely(!vport->ops->get_egress_tun_info))
+ return -EINVAL;
- spin_lock_bh(&vport->stats_lock);
+ return vport->ops->get_egress_tun_info(vport, skb, upcall);
+}
- switch (err_type) {
- case VPORT_E_RX_DROPPED:
- vport->err_stats.rx_dropped++;
- break;
+static unsigned int packet_length(const struct sk_buff *skb)
+{
+ unsigned int length = skb->len - ETH_HLEN;
- case VPORT_E_RX_ERROR:
- vport->err_stats.rx_errors++;
- break;
+ if (skb->protocol == htons(ETH_P_8021Q))
+ length -= VLAN_HLEN;
- case VPORT_E_TX_DROPPED:
- vport->err_stats.tx_dropped++;
- break;
+ return length;
+}
- case VPORT_E_TX_ERROR:
- vport->err_stats.tx_errors++;
- break;
- };
+void ovs_vport_send(struct vport *vport, struct sk_buff *skb)
+{
+ int mtu = vport->dev->mtu;
- spin_unlock_bh(&vport->stats_lock);
+ if (unlikely(packet_length(skb) > mtu && !skb_is_gso(skb))) {
+ net_warn_ratelimited("%s: dropped over-mtu packet: %d > %d\n",
+ vport->dev->name,
+ packet_length(skb), mtu);
+ vport->dev->stats.tx_errors++;
+ goto drop;
}
+
+ skb->dev = vport->dev;
+ vport->ops->send(skb);
+ return;
+
+drop:
+ kfree_skb(skb);
}
projects / cascardo / ovs.git / blobdiff