X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=datapath%2Fvport.c;h=172261aa58985b010142d17d6310bc142380d9c2;hb=e8087a87a3155656596d92ebecfa37841b637ef7;hp=31edc587a7e0a37479e3fb1f8744b816ebcafdd3;hpb=6455100f38e9312346f4d58511595f695d813537;p=openvswitch diff --git a/datapath/vport.c b/datapath/vport.c index 31edc587..172261aa 100644 --- a/datapath/vport.c +++ b/datapath/vport.c @@ -1,15 +1,25 @@ /* - * Copyright (c) 2010, 2011 Nicira Networks. - * Distributed under the terms of the GNU GPL version 2. + * Copyright (c) 2007-2012 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 */ -#include #include #include #include +#include #include #include #include @@ -18,19 +28,21 @@ #include #include #include +#include +#include "datapath.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, + &ovs_netdev_vport_ops, + &ovs_internal_vport_ops, + &ovs_patch_vport_ops, + &ovs_gre_vport_ops, #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26) - &capwap_vport_ops, + &ovs_capwap_vport_ops, #endif }; @@ -42,12 +54,12 @@ static struct hlist_head *dev_table; #define VPORT_HASH_BUCKETS 1024 /** - * vport_init - initialize vport subsystem + * ovs_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; @@ -77,7 +89,7 @@ int vport_init(void) if (!err) vport_ops_list[n_vport_types++] = new_ops; else if (new_ops->flags & VPORT_F_REQUIRED) { - vport_exit(); + ovs_vport_exit(); goto error; } } @@ -91,12 +103,12 @@ error: } /** - * 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. */ -void vport_exit(void) +void ovs_vport_exit(void) { int i; @@ -109,27 +121,28 @@ void vport_exit(void) kfree(dev_table); } -static struct hlist_head *hash_bucket(const char *name) +static struct hlist_head *hash_bucket(struct net *net, const char *name) { - unsigned int hash = full_name_hash(name, strlen(name)); + unsigned int hash = jhash(name, strlen(name), (unsigned long) net); return &dev_table[hash & (VPORT_HASH_BUCKETS - 1)]; } /** - * 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 * * Must be called with RTNL or RCU read lock. */ -struct vport *vport_locate(const char *name) +struct vport *ovs_vport_locate(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; hlist_for_each_entry_rcu(vport, node, bucket, hash_node) - if (!strcmp(name, vport_get_name(vport))) + if (!strcmp(name, vport->ops->get_name(vport)) && + net_eq(ovs_dp_get_net(vport->dp), net)) return vport; return NULL; @@ -143,13 +156,13 @@ static void release_vport(struct kobject *kobj) static struct kobj_type brport_ktype = { #ifdef CONFIG_SYSFS - .sysfs_ops = &brport_sysfs_ops, + .sysfs_ops = &ovs_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 @@ -157,10 +170,10 @@ static struct kobj_type brport_ktype = { * Allocate and initialize a new vport defined by @ops. The vport will contain * a private data area of size @priv_size that can be accessed using * vport_priv(). vports that are no longer needed should be released with - * vport_free(). + * ovs_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; @@ -179,6 +192,7 @@ struct vport *vport_alloc(int priv_size, const struct vport_ops *ops, vport->port_no = parms->port_no; vport->upcall_pid = parms->upcall_pid; vport->ops = ops; + INIT_HLIST_NODE(&vport->dp_hash_node); /* Initialize kobject for bridge. This will be added as * /sys/class/net//brport later, if sysfs is enabled. */ @@ -186,8 +200,10 @@ struct vport *vport_alloc(int priv_size, const struct vport_ops *ops, kobject_init(&vport->kobj, &brport_ktype); vport->percpu_stats = alloc_percpu(struct vport_percpu_stats); - if (!vport->percpu_stats) + if (!vport->percpu_stats) { + kfree(vport); return ERR_PTR(-ENOMEM); + } spin_lock_init(&vport->stats_lock); @@ -195,16 +211,16 @@ struct vport *vport_alloc(int priv_size, const struct vport_ops *ops, } /** - * 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. + * Frees a vport allocated with ovs_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) { free_percpu(vport->percpu_stats); @@ -212,14 +228,14 @@ void vport_free(struct vport *vport) } /** - * 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). RTNL lock must be held. */ -struct vport *vport_add(const struct vport_parms *parms) +struct vport *ovs_vport_add(const struct vport_parms *parms) { struct vport *vport; int err = 0; @@ -229,14 +245,17 @@ struct vport *vport_add(const struct vport_parms *parms) for (i = 0; i < n_vport_types; i++) { if (vport_ops_list[i]->type == parms->type) { + struct hlist_head *bucket; + vport = vport_ops_list[i]->create(parms); if (IS_ERR(vport)) { err = PTR_ERR(vport); goto out; } - hlist_add_head_rcu(&vport->hash_node, - hash_bucket(vport_get_name(vport))); + bucket = hash_bucket(ovs_dp_get_net(vport->dp), + vport->ops->get_name(vport)); + hlist_add_head_rcu(&vport->hash_node, bucket); return vport; } } @@ -248,7 +267,7 @@ out: } /** - * vport_set_options - 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. @@ -256,7 +275,7 @@ out: * Modifies an existing device with the specified configuration (which is * dependent on device type). RTNL lock must be held. */ -int vport_set_options(struct vport *vport, struct nlattr *options) +int ovs_vport_set_options(struct vport *vport, struct nlattr *options) { ASSERT_RTNL(); @@ -266,14 +285,14 @@ int vport_set_options(struct vport *vport, struct nlattr *options) } /** - * vport_del - delete existing vport device + * 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. RTNL lock must be held. */ -void vport_del(struct vport *vport) +void ovs_vport_del(struct vport *vport) { ASSERT_RTNL(); @@ -283,7 +302,7 @@ void vport_del(struct vport *vport) } /** - * vport_set_addr - set device Ethernet address (for kernel callers) + * ovs_vport_set_addr - set device Ethernet address (for kernel callers) * * @vport: vport on which to set Ethernet address. * @addr: New address. @@ -292,7 +311,7 @@ void vport_del(struct vport *vport) * 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) +int ovs_vport_set_addr(struct vport *vport, const unsigned char *addr) { ASSERT_RTNL(); @@ -306,7 +325,7 @@ int vport_set_addr(struct vport *vport, const unsigned char *addr) } /** - * vport_set_stats - sets offset device stats + * ovs_vport_set_stats - sets offset device stats * * @vport: vport on which to set stats * @stats: stats to set @@ -318,7 +337,7 @@ int vport_set_addr(struct vport *vport, const unsigned char *addr) * * Must be called with RTNL lock. */ -void vport_set_stats(struct vport *vport, struct ovs_vport_stats *stats) +void ovs_vport_set_stats(struct vport *vport, struct ovs_vport_stats *stats) { ASSERT_RTNL(); @@ -328,62 +347,7 @@ void vport_set_stats(struct vport *vport, struct ovs_vport_stats *stats) } /** - * 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); -} - -/** - * vport_get_type - retrieve device type - * - * @vport: vport from which to retrieve the type. - * - * Retrieves the type of the given device. - */ -enum ovs_vport_type vport_get_type(const struct vport *vport) -{ - return vport->ops->type; -} - -/** - * 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) -{ - return vport->ops->get_addr(vport); -} - -/** - * vport_get_kobj - retrieve associated kobj - * - * @vport: vport from which to retrieve the associated kobj - * - * 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 + * ovs_vport_get_stats - retrieve device stats * * @vport: vport from which to retrieve the stats * @stats: location to store stats @@ -392,7 +356,7 @@ struct kobject *vport_get_kobj(const struct vport *vport) * * Must be called with RTNL lock or rcu_read_lock. */ -void vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats) +void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats) { int i; @@ -421,14 +385,14 @@ void vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats) for_each_possible_cpu(i) { const struct vport_percpu_stats *percpu_stats; struct vport_percpu_stats local_stats; - unsigned seqcount; + unsigned int start; percpu_stats = per_cpu_ptr(vport->percpu_stats, i); do { - seqcount = read_seqcount_begin(&percpu_stats->seqlock); + start = u64_stats_fetch_begin_bh(&percpu_stats->sync); local_stats = *percpu_stats; - } while (read_seqcount_retry(&percpu_stats->seqlock, seqcount)); + } while (u64_stats_fetch_retry_bh(&percpu_stats->sync, start)); stats->rx_bytes += local_stats.rx_bytes; stats->rx_packets += local_stats.rx_packets; @@ -438,84 +402,7 @@ void vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats) } /** - * vport_get_flags - retrieve device flags - * - * @vport: vport from which to retrieve the flags - * - * Retrieves the flags of the given device. - * - * Must be called with RTNL lock or rcu_read_lock. - */ -unsigned vport_get_flags(const struct vport *vport) -{ - return vport->ops->get_dev_flags(vport); -} - -/** - * vport_get_flags - check whether device is running - * - * @vport: vport on which to check status. - * - * Checks whether the given device is running. - * - * Must be called with RTNL lock or rcu_read_lock. - */ -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 check status - * - * Retrieves the RFC2863 operstate of the given device. - * - * Must be called with RTNL lock or rcu_read_lock. - */ -unsigned char vport_get_operstate(const struct vport *vport) -{ - return vport->ops->get_operstate(vport); -} - -/** - * vport_get_ifindex - retrieve device system interface index - * - * @vport: vport from which to retrieve index - * - * Retrieves the system interface index of the given device or 0 if - * the device does not have one (in the case of virtual ports). - * Returns a negative index on error. - * - * Must be called with RTNL lock or rcu_read_lock. - */ -int vport_get_ifindex(const struct vport *vport) -{ - if (vport->ops->get_ifindex) - return vport->ops->get_ifindex(vport); - else - return 0; -} - -/** - * vport_get_mtu - retrieve device MTU - * - * @vport: vport from which to retrieve MTU - * - * Retrieves the MTU of the given device. Returns 0 if @vport does not have an - * MTU (as e.g. some tunnels do not). Either RTNL lock or rcu_read_lock must - * be held. - */ -int vport_get_mtu(const struct vport *vport) -{ - if (!vport->ops->get_mtu) - return 0; - return vport->ops->get_mtu(vport); -} - -/** - * vport_get_options - retrieve device options + * ovs_vport_get_options - retrieve device options * * @vport: vport from which to retrieve the options. * @skb: sk_buff where options should be appended. @@ -530,7 +417,7 @@ int vport_get_mtu(const struct vport *vport) * * Must be called with RTNL lock or rcu_read_lock. */ -int vport_get_options(const struct vport *vport, struct sk_buff *skb) +int ovs_vport_get_options(const struct vport *vport, struct sk_buff *skb) { struct nlattr *nla; @@ -551,7 +438,7 @@ int vport_get_options(const struct vport *vport, struct sk_buff *skb) } /** - * 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 @@ -560,16 +447,16 @@ int vport_get_options(const struct vport *vport, struct sk_buff *skb) * skb->data should point to the Ethernet header. The caller must have already * called compute_ip_summed() to initialize the checksumming fields. */ -void vport_receive(struct vport *vport, struct sk_buff *skb) +void ovs_vport_receive(struct vport *vport, struct sk_buff *skb) { struct vport_percpu_stats *stats; stats = per_cpu_ptr(vport->percpu_stats, smp_processor_id()); - write_seqcount_begin(&stats->seqlock); + u64_stats_update_begin(&stats->sync); stats->rx_packets++; stats->rx_bytes += skb->len; - write_seqcount_end(&stats->seqlock); + u64_stats_update_end(&stats->sync); if (!(vport->ops->flags & VPORT_F_FLOW)) OVS_CB(skb)->flow = NULL; @@ -577,11 +464,11 @@ void vport_receive(struct vport *vport, struct sk_buff *skb) if (!(vport->ops->flags & VPORT_F_TUN_ID)) OVS_CB(skb)->tun_id = 0; - dp_process_received_packet(vport, skb); + ovs_dp_process_received_packet(vport, skb); } /** - * vport_send - send a packet on a device + * ovs_vport_send - send a packet on a device * * @vport: vport on which to send the packet * @skb: skb to send @@ -589,23 +476,25 @@ void vport_receive(struct vport *vport, struct sk_buff *skb) * 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) +int ovs_vport_send(struct vport *vport, struct sk_buff *skb) { - struct vport_percpu_stats *stats; int sent = vport->ops->send(vport, skb); - stats = per_cpu_ptr(vport->percpu_stats, smp_processor_id()); + if (likely(sent)) { + struct vport_percpu_stats *stats; - write_seqcount_begin(&stats->seqlock); - stats->tx_packets++; - stats->tx_bytes += sent; - write_seqcount_end(&stats->seqlock); + stats = per_cpu_ptr(vport->percpu_stats, smp_processor_id()); + u64_stats_update_begin(&stats->sync); + stats->tx_packets++; + stats->tx_bytes += sent; + u64_stats_update_end(&stats->sync); + } return sent; } /** - * vport_record_error - indicate device error to generic stats layer + * ovs_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 @@ -613,7 +502,7 @@ int vport_send(struct vport *vport, struct sk_buff *skb) * 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) +void ovs_vport_record_error(struct vport *vport, enum vport_err_type err_type) { spin_lock(&vport->stats_lock);