Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 1 | /* |
Raju Subramanian | caf2ee1 | 2012-05-03 18:55:23 -0700 | [diff] [blame] | 2 | * Copyright (c) 2007-2012 Nicira, Inc. |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of version 2 of the GNU General Public |
| 6 | * License as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program; if not, write to the Free Software |
| 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 16 | * 02110-1301, USA |
| 17 | */ |
| 18 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 19 | #include <linux/etherdevice.h> |
| 20 | #include <linux/if.h> |
| 21 | #include <linux/if_vlan.h> |
Pravin B Shelar | 46df7b8 | 2012-02-22 19:58:59 -0800 | [diff] [blame] | 22 | #include <linux/jhash.h> |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 23 | #include <linux/kernel.h> |
| 24 | #include <linux/list.h> |
| 25 | #include <linux/mutex.h> |
| 26 | #include <linux/percpu.h> |
| 27 | #include <linux/rcupdate.h> |
| 28 | #include <linux/rtnetlink.h> |
| 29 | #include <linux/compat.h> |
Pravin B Shelar | 46df7b8 | 2012-02-22 19:58:59 -0800 | [diff] [blame] | 30 | #include <net/net_namespace.h> |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 31 | |
Pravin B Shelar | 46df7b8 | 2012-02-22 19:58:59 -0800 | [diff] [blame] | 32 | #include "datapath.h" |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 33 | #include "vport.h" |
| 34 | #include "vport-internal_dev.h" |
| 35 | |
| 36 | /* List of statically compiled vport implementations. Don't forget to also |
| 37 | * add yours to the list at the bottom of vport.h. */ |
| 38 | static const struct vport_ops *vport_ops_list[] = { |
| 39 | &ovs_netdev_vport_ops, |
| 40 | &ovs_internal_vport_ops, |
Pravin B Shelar | aa31070 | 2013-06-17 17:50:33 -0700 | [diff] [blame] | 41 | |
Pravin B Shelar | 479b1a5 | 2013-06-20 15:08:14 -0700 | [diff] [blame^] | 42 | #if IS_ENABLED(CONFIG_NET_IPGRE_DEMUX) |
Pravin B Shelar | aa31070 | 2013-06-17 17:50:33 -0700 | [diff] [blame] | 43 | &ovs_gre_vport_ops, |
| 44 | #endif |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 45 | }; |
| 46 | |
Pravin B Shelar | 8e4e171 | 2013-04-15 13:23:03 -0700 | [diff] [blame] | 47 | /* Protected by RCU read lock for reading, ovs_mutex for writing. */ |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 48 | static struct hlist_head *dev_table; |
| 49 | #define VPORT_HASH_BUCKETS 1024 |
| 50 | |
| 51 | /** |
| 52 | * ovs_vport_init - initialize vport subsystem |
| 53 | * |
| 54 | * Called at module load time to initialize the vport subsystem. |
| 55 | */ |
| 56 | int ovs_vport_init(void) |
| 57 | { |
| 58 | dev_table = kzalloc(VPORT_HASH_BUCKETS * sizeof(struct hlist_head), |
| 59 | GFP_KERNEL); |
| 60 | if (!dev_table) |
| 61 | return -ENOMEM; |
| 62 | |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * ovs_vport_exit - shutdown vport subsystem |
| 68 | * |
| 69 | * Called at module exit time to shutdown the vport subsystem. |
| 70 | */ |
| 71 | void ovs_vport_exit(void) |
| 72 | { |
| 73 | kfree(dev_table); |
| 74 | } |
| 75 | |
Pravin B Shelar | 46df7b8 | 2012-02-22 19:58:59 -0800 | [diff] [blame] | 76 | static struct hlist_head *hash_bucket(struct net *net, const char *name) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 77 | { |
Pravin B Shelar | 46df7b8 | 2012-02-22 19:58:59 -0800 | [diff] [blame] | 78 | unsigned int hash = jhash(name, strlen(name), (unsigned long) net); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 79 | return &dev_table[hash & (VPORT_HASH_BUCKETS - 1)]; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * ovs_vport_locate - find a port that has already been created |
| 84 | * |
| 85 | * @name: name of port to find |
| 86 | * |
Pravin B Shelar | 8e4e171 | 2013-04-15 13:23:03 -0700 | [diff] [blame] | 87 | * Must be called with ovs or RCU read lock. |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 88 | */ |
Pravin B Shelar | 46df7b8 | 2012-02-22 19:58:59 -0800 | [diff] [blame] | 89 | struct vport *ovs_vport_locate(struct net *net, const char *name) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 90 | { |
Pravin B Shelar | 46df7b8 | 2012-02-22 19:58:59 -0800 | [diff] [blame] | 91 | struct hlist_head *bucket = hash_bucket(net, name); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 92 | struct vport *vport; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 93 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 94 | hlist_for_each_entry_rcu(vport, bucket, hash_node) |
Pravin B Shelar | 46df7b8 | 2012-02-22 19:58:59 -0800 | [diff] [blame] | 95 | if (!strcmp(name, vport->ops->get_name(vport)) && |
| 96 | net_eq(ovs_dp_get_net(vport->dp), net)) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 97 | return vport; |
| 98 | |
| 99 | return NULL; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * ovs_vport_alloc - allocate and initialize new vport |
| 104 | * |
| 105 | * @priv_size: Size of private data area to allocate. |
| 106 | * @ops: vport device ops |
| 107 | * |
| 108 | * Allocate and initialize a new vport defined by @ops. The vport will contain |
| 109 | * a private data area of size @priv_size that can be accessed using |
| 110 | * vport_priv(). vports that are no longer needed should be released with |
| 111 | * vport_free(). |
| 112 | */ |
| 113 | struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops, |
| 114 | const struct vport_parms *parms) |
| 115 | { |
| 116 | struct vport *vport; |
| 117 | size_t alloc_size; |
| 118 | |
| 119 | alloc_size = sizeof(struct vport); |
| 120 | if (priv_size) { |
| 121 | alloc_size = ALIGN(alloc_size, VPORT_ALIGN); |
| 122 | alloc_size += priv_size; |
| 123 | } |
| 124 | |
| 125 | vport = kzalloc(alloc_size, GFP_KERNEL); |
| 126 | if (!vport) |
| 127 | return ERR_PTR(-ENOMEM); |
| 128 | |
| 129 | vport->dp = parms->dp; |
| 130 | vport->port_no = parms->port_no; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 131 | vport->upcall_portid = parms->upcall_portid; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 132 | vport->ops = ops; |
Pravin B Shelar | 15eac2a | 2012-08-23 12:40:54 -0700 | [diff] [blame] | 133 | INIT_HLIST_NODE(&vport->dp_hash_node); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 134 | |
Pravin B Shelar | e0f0ecf | 2013-04-15 13:30:37 -0700 | [diff] [blame] | 135 | vport->percpu_stats = alloc_percpu(struct pcpu_tstats); |
Dan Carpenter | f0a98ae | 2011-12-05 20:27:07 +0000 | [diff] [blame] | 136 | if (!vport->percpu_stats) { |
| 137 | kfree(vport); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 138 | return ERR_PTR(-ENOMEM); |
Dan Carpenter | f0a98ae | 2011-12-05 20:27:07 +0000 | [diff] [blame] | 139 | } |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 140 | |
| 141 | spin_lock_init(&vport->stats_lock); |
| 142 | |
| 143 | return vport; |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * ovs_vport_free - uninitialize and free vport |
| 148 | * |
| 149 | * @vport: vport to free |
| 150 | * |
| 151 | * Frees a vport allocated with vport_alloc() when it is no longer needed. |
| 152 | * |
| 153 | * The caller must ensure that an RCU grace period has passed since the last |
| 154 | * time @vport was in a datapath. |
| 155 | */ |
| 156 | void ovs_vport_free(struct vport *vport) |
| 157 | { |
| 158 | free_percpu(vport->percpu_stats); |
| 159 | kfree(vport); |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * ovs_vport_add - add vport device (for kernel callers) |
| 164 | * |
| 165 | * @parms: Information about new vport. |
| 166 | * |
| 167 | * Creates a new vport with the specified configuration (which is dependent on |
Pravin B Shelar | 8e4e171 | 2013-04-15 13:23:03 -0700 | [diff] [blame] | 168 | * device type). ovs_mutex must be held. |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 169 | */ |
| 170 | struct vport *ovs_vport_add(const struct vport_parms *parms) |
| 171 | { |
| 172 | struct vport *vport; |
| 173 | int err = 0; |
| 174 | int i; |
| 175 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 176 | for (i = 0; i < ARRAY_SIZE(vport_ops_list); i++) { |
| 177 | if (vport_ops_list[i]->type == parms->type) { |
Pravin B Shelar | 46df7b8 | 2012-02-22 19:58:59 -0800 | [diff] [blame] | 178 | struct hlist_head *bucket; |
| 179 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 180 | vport = vport_ops_list[i]->create(parms); |
| 181 | if (IS_ERR(vport)) { |
| 182 | err = PTR_ERR(vport); |
| 183 | goto out; |
| 184 | } |
| 185 | |
Pravin B Shelar | 46df7b8 | 2012-02-22 19:58:59 -0800 | [diff] [blame] | 186 | bucket = hash_bucket(ovs_dp_get_net(vport->dp), |
| 187 | vport->ops->get_name(vport)); |
| 188 | hlist_add_head_rcu(&vport->hash_node, bucket); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 189 | return vport; |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | err = -EAFNOSUPPORT; |
| 194 | |
| 195 | out: |
| 196 | return ERR_PTR(err); |
| 197 | } |
| 198 | |
| 199 | /** |
| 200 | * ovs_vport_set_options - modify existing vport device (for kernel callers) |
| 201 | * |
| 202 | * @vport: vport to modify. |
| 203 | * @port: New configuration. |
| 204 | * |
| 205 | * Modifies an existing device with the specified configuration (which is |
Pravin B Shelar | 8e4e171 | 2013-04-15 13:23:03 -0700 | [diff] [blame] | 206 | * dependent on device type). ovs_mutex must be held. |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 207 | */ |
| 208 | int ovs_vport_set_options(struct vport *vport, struct nlattr *options) |
| 209 | { |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 210 | if (!vport->ops->set_options) |
| 211 | return -EOPNOTSUPP; |
| 212 | return vport->ops->set_options(vport, options); |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * ovs_vport_del - delete existing vport device |
| 217 | * |
| 218 | * @vport: vport to delete. |
| 219 | * |
| 220 | * Detaches @vport from its datapath and destroys it. It is possible to fail |
Pravin B Shelar | 8e4e171 | 2013-04-15 13:23:03 -0700 | [diff] [blame] | 221 | * for reasons such as lack of memory. ovs_mutex must be held. |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 222 | */ |
| 223 | void ovs_vport_del(struct vport *vport) |
| 224 | { |
Pravin B Shelar | 8e4e171 | 2013-04-15 13:23:03 -0700 | [diff] [blame] | 225 | ASSERT_OVSL(); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 226 | |
| 227 | hlist_del_rcu(&vport->hash_node); |
| 228 | |
| 229 | vport->ops->destroy(vport); |
| 230 | } |
| 231 | |
| 232 | /** |
| 233 | * ovs_vport_get_stats - retrieve device stats |
| 234 | * |
| 235 | * @vport: vport from which to retrieve the stats |
| 236 | * @stats: location to store stats |
| 237 | * |
| 238 | * Retrieves transmit, receive, and error stats for the given device. |
| 239 | * |
Pravin B Shelar | 8e4e171 | 2013-04-15 13:23:03 -0700 | [diff] [blame] | 240 | * Must be called with ovs_mutex or rcu_read_lock. |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 241 | */ |
| 242 | void ovs_vport_get_stats(struct vport *vport, struct ovs_vport_stats *stats) |
| 243 | { |
| 244 | int i; |
| 245 | |
| 246 | memset(stats, 0, sizeof(*stats)); |
| 247 | |
| 248 | /* We potentially have 2 sources of stats that need to be combined: |
| 249 | * those we have collected (split into err_stats and percpu_stats) from |
| 250 | * set_stats() and device error stats from netdev->get_stats() (for |
| 251 | * errors that happen downstream and therefore aren't reported through |
| 252 | * our vport_record_error() function). |
| 253 | * Stats from first source are reported by ovs (OVS_VPORT_ATTR_STATS). |
| 254 | * netdev-stats can be directly read over netlink-ioctl. |
| 255 | */ |
| 256 | |
| 257 | spin_lock_bh(&vport->stats_lock); |
| 258 | |
| 259 | stats->rx_errors = vport->err_stats.rx_errors; |
| 260 | stats->tx_errors = vport->err_stats.tx_errors; |
| 261 | stats->tx_dropped = vport->err_stats.tx_dropped; |
| 262 | stats->rx_dropped = vport->err_stats.rx_dropped; |
| 263 | |
| 264 | spin_unlock_bh(&vport->stats_lock); |
| 265 | |
| 266 | for_each_possible_cpu(i) { |
Pravin B Shelar | e0f0ecf | 2013-04-15 13:30:37 -0700 | [diff] [blame] | 267 | const struct pcpu_tstats *percpu_stats; |
| 268 | struct pcpu_tstats local_stats; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 269 | unsigned int start; |
| 270 | |
| 271 | percpu_stats = per_cpu_ptr(vport->percpu_stats, i); |
| 272 | |
| 273 | do { |
Pravin B Shelar | e0f0ecf | 2013-04-15 13:30:37 -0700 | [diff] [blame] | 274 | start = u64_stats_fetch_begin_bh(&percpu_stats->syncp); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 275 | local_stats = *percpu_stats; |
Pravin B Shelar | e0f0ecf | 2013-04-15 13:30:37 -0700 | [diff] [blame] | 276 | } while (u64_stats_fetch_retry_bh(&percpu_stats->syncp, start)); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 277 | |
| 278 | stats->rx_bytes += local_stats.rx_bytes; |
| 279 | stats->rx_packets += local_stats.rx_packets; |
| 280 | stats->tx_bytes += local_stats.tx_bytes; |
| 281 | stats->tx_packets += local_stats.tx_packets; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * ovs_vport_get_options - retrieve device options |
| 287 | * |
| 288 | * @vport: vport from which to retrieve the options. |
| 289 | * @skb: sk_buff where options should be appended. |
| 290 | * |
| 291 | * Retrieves the configuration of the given device, appending an |
| 292 | * %OVS_VPORT_ATTR_OPTIONS attribute that in turn contains nested |
| 293 | * vport-specific attributes to @skb. |
| 294 | * |
| 295 | * Returns 0 if successful, -EMSGSIZE if @skb has insufficient room, or another |
| 296 | * negative error code if a real error occurred. If an error occurs, @skb is |
| 297 | * left unmodified. |
| 298 | * |
Pravin B Shelar | 8e4e171 | 2013-04-15 13:23:03 -0700 | [diff] [blame] | 299 | * Must be called with ovs_mutex or rcu_read_lock. |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 300 | */ |
| 301 | int ovs_vport_get_options(const struct vport *vport, struct sk_buff *skb) |
| 302 | { |
| 303 | struct nlattr *nla; |
Thomas Graf | 5d96335 | 2013-04-03 00:30:43 +0200 | [diff] [blame] | 304 | int err; |
| 305 | |
| 306 | if (!vport->ops->get_options) |
| 307 | return 0; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 308 | |
| 309 | nla = nla_nest_start(skb, OVS_VPORT_ATTR_OPTIONS); |
| 310 | if (!nla) |
| 311 | return -EMSGSIZE; |
| 312 | |
Thomas Graf | 5d96335 | 2013-04-03 00:30:43 +0200 | [diff] [blame] | 313 | err = vport->ops->get_options(vport, skb); |
| 314 | if (err) { |
| 315 | nla_nest_cancel(skb, nla); |
| 316 | return err; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 317 | } |
| 318 | |
| 319 | nla_nest_end(skb, nla); |
| 320 | return 0; |
| 321 | } |
| 322 | |
| 323 | /** |
| 324 | * ovs_vport_receive - pass up received packet to the datapath for processing |
| 325 | * |
| 326 | * @vport: vport that received the packet |
| 327 | * @skb: skb that was received |
| 328 | * |
| 329 | * Must be called with rcu_read_lock. The packet cannot be shared and |
Cong Wang | d176ca2 | 2013-02-22 19:41:26 +0800 | [diff] [blame] | 330 | * skb->data should point to the Ethernet header. |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 331 | */ |
Pravin B Shelar | 7d5437c | 2013-06-17 17:50:18 -0700 | [diff] [blame] | 332 | void ovs_vport_receive(struct vport *vport, struct sk_buff *skb, |
| 333 | struct ovs_key_ipv4_tunnel *tun_key) |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 334 | { |
Pravin B Shelar | e0f0ecf | 2013-04-15 13:30:37 -0700 | [diff] [blame] | 335 | struct pcpu_tstats *stats; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 336 | |
Shan Wei | 404f2f1 | 2012-11-13 09:52:25 +0800 | [diff] [blame] | 337 | stats = this_cpu_ptr(vport->percpu_stats); |
Pravin B Shelar | e0f0ecf | 2013-04-15 13:30:37 -0700 | [diff] [blame] | 338 | u64_stats_update_begin(&stats->syncp); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 339 | stats->rx_packets++; |
| 340 | stats->rx_bytes += skb->len; |
Pravin B Shelar | e0f0ecf | 2013-04-15 13:30:37 -0700 | [diff] [blame] | 341 | u64_stats_update_end(&stats->syncp); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 342 | |
Pravin B Shelar | 7d5437c | 2013-06-17 17:50:18 -0700 | [diff] [blame] | 343 | OVS_CB(skb)->tun_key = tun_key; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 344 | ovs_dp_process_received_packet(vport, skb); |
| 345 | } |
| 346 | |
| 347 | /** |
| 348 | * ovs_vport_send - send a packet on a device |
| 349 | * |
| 350 | * @vport: vport on which to send the packet |
| 351 | * @skb: skb to send |
| 352 | * |
Pravin B Shelar | 8e4e171 | 2013-04-15 13:23:03 -0700 | [diff] [blame] | 353 | * Sends the given packet and returns the length of data sent. Either ovs |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 354 | * lock or rcu_read_lock must be held. |
| 355 | */ |
| 356 | int ovs_vport_send(struct vport *vport, struct sk_buff *skb) |
| 357 | { |
| 358 | int sent = vport->ops->send(vport, skb); |
| 359 | |
Pravin B Shelar | 91b7514 | 2013-05-13 08:22:34 -0700 | [diff] [blame] | 360 | if (likely(sent > 0)) { |
Pravin B Shelar | e0f0ecf | 2013-04-15 13:30:37 -0700 | [diff] [blame] | 361 | struct pcpu_tstats *stats; |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 362 | |
Shan Wei | 404f2f1 | 2012-11-13 09:52:25 +0800 | [diff] [blame] | 363 | stats = this_cpu_ptr(vport->percpu_stats); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 364 | |
Pravin B Shelar | e0f0ecf | 2013-04-15 13:30:37 -0700 | [diff] [blame] | 365 | u64_stats_update_begin(&stats->syncp); |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 366 | stats->tx_packets++; |
| 367 | stats->tx_bytes += sent; |
Pravin B Shelar | e0f0ecf | 2013-04-15 13:30:37 -0700 | [diff] [blame] | 368 | u64_stats_update_end(&stats->syncp); |
Pravin B Shelar | 91b7514 | 2013-05-13 08:22:34 -0700 | [diff] [blame] | 369 | } else if (sent < 0) { |
| 370 | ovs_vport_record_error(vport, VPORT_E_TX_ERROR); |
| 371 | kfree_skb(skb); |
| 372 | } else |
| 373 | ovs_vport_record_error(vport, VPORT_E_TX_DROPPED); |
| 374 | |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 375 | return sent; |
| 376 | } |
| 377 | |
| 378 | /** |
| 379 | * ovs_vport_record_error - indicate device error to generic stats layer |
| 380 | * |
| 381 | * @vport: vport that encountered the error |
| 382 | * @err_type: one of enum vport_err_type types to indicate the error type |
| 383 | * |
| 384 | * If using the vport generic stats layer indicate that an error of the given |
Andy Hill | af78416 | 2013-06-07 16:53:50 -0700 | [diff] [blame] | 385 | * type has occurred. |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 386 | */ |
| 387 | void ovs_vport_record_error(struct vport *vport, enum vport_err_type err_type) |
| 388 | { |
| 389 | spin_lock(&vport->stats_lock); |
| 390 | |
| 391 | switch (err_type) { |
| 392 | case VPORT_E_RX_DROPPED: |
| 393 | vport->err_stats.rx_dropped++; |
| 394 | break; |
| 395 | |
| 396 | case VPORT_E_RX_ERROR: |
| 397 | vport->err_stats.rx_errors++; |
| 398 | break; |
| 399 | |
| 400 | case VPORT_E_TX_DROPPED: |
| 401 | vport->err_stats.tx_dropped++; |
| 402 | break; |
| 403 | |
| 404 | case VPORT_E_TX_ERROR: |
| 405 | vport->err_stats.tx_errors++; |
| 406 | break; |
Peter Senna Tschudin | a2bf91b | 2012-09-18 07:10:44 +0000 | [diff] [blame] | 407 | } |
Jesse Gross | ccb1352 | 2011-10-25 19:26:31 -0700 | [diff] [blame] | 408 | |
| 409 | spin_unlock(&vport->stats_lock); |
| 410 | } |
Pravin B Shelar | aa31070 | 2013-06-17 17:50:33 -0700 | [diff] [blame] | 411 | |
| 412 | static void free_vport_rcu(struct rcu_head *rcu) |
| 413 | { |
| 414 | struct vport *vport = container_of(rcu, struct vport, rcu); |
| 415 | |
| 416 | ovs_vport_free(vport); |
| 417 | } |
| 418 | |
| 419 | void ovs_vport_deferred_free(struct vport *vport) |
| 420 | { |
| 421 | if (!vport) |
| 422 | return; |
| 423 | |
| 424 | call_rcu(&vport->rcu, free_vport_rcu); |
| 425 | } |