X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fdpif-linux.c;h=d84b5fa754ed1186c45d11213cad0c122406cf7a;hb=7fb563b94c6b265f5dae9965fe33392716a7886e;hp=f1d42dc230275351bba8cbf5a73d4ca58ad1b155;hpb=3005302426764a2f701bb3507ad9602e3fe2dbb9;p=openvswitch

diff --git a/lib/dpif-linux.c b/lib/dpif-linux.c
index f1d42dc2..d84b5fa7 100644
--- a/lib/dpif-linux.c
+++ b/lib/dpif-linux.c
@@ -32,8 +32,10 @@
 #include <sys/stat.h>
 #include <unistd.h>
 
+#include "bitmap.h"
 #include "dpif-provider.h"
 #include "netdev.h"
+#include "netdev-linux.h"
 #include "netdev-vport.h"
 #include "netlink-socket.h"
 #include "netlink.h"
@@ -45,13 +47,17 @@
 #include "rtnetlink.h"
 #include "rtnetlink-link.h"
 #include "shash.h"
-#include "svec.h"
+#include "sset.h"
 #include "unaligned.h"
 #include "util.h"
 #include "vlog.h"
 
 VLOG_DEFINE_THIS_MODULE(dpif_linux);
 
+enum { LRU_MAX_PORTS = 1024 };
+enum { LRU_MASK = LRU_MAX_PORTS - 1};
+BUILD_ASSERT_DECL(IS_POW2(LRU_MAX_PORTS));
+
 struct dpif_linux_dp {
     /* Generic Netlink header. */
     uint8_t cmd;
@@ -125,9 +131,15 @@ struct dpif_linux {
     unsigned int listen_mask;
 
     /* Change notification. */
-    struct shash changed_ports;  /* Ports that have changed. */
+    struct sset changed_ports;  /* Ports that have changed. */
     struct rtnetlink_notifier port_notifier;
     bool change_error;
+
+    /* Queue of unused ports. */
+    unsigned long *lru_bitmap;
+    uint16_t lru_ports[LRU_MAX_PORTS];
+    size_t lru_head;
+    size_t lru_tail;
 };
 
 static struct vlog_rate_limit error_rl = VLOG_RATE_LIMIT_INIT(9999, 5);
@@ -158,8 +170,31 @@ dpif_linux_cast(const struct dpif *dpif)
     return CONTAINER_OF(dpif, struct dpif_linux, dpif);
 }
 
+static void
+dpif_linux_push_port(struct dpif_linux *dp, uint16_t port)
+{
+    if (port < LRU_MAX_PORTS && !bitmap_is_set(dp->lru_bitmap, port)) {
+        bitmap_set1(dp->lru_bitmap, port);
+        dp->lru_ports[dp->lru_head++ & LRU_MASK] = port;
+    }
+}
+
+static uint32_t
+dpif_linux_pop_port(struct dpif_linux *dp)
+{
+    uint16_t port;
+
+    if (dp->lru_head == dp->lru_tail) {
+        return UINT32_MAX;
+    }
+
+    port = dp->lru_ports[dp->lru_tail++ & LRU_MASK];
+    bitmap_set0(dp->lru_bitmap, port);
+    return port;
+}
+
 static int
-dpif_linux_enumerate(struct svec *all_dps)
+dpif_linux_enumerate(struct sset *all_dps)
 {
     struct nl_dump dump;
     struct ofpbuf msg;
@@ -175,7 +210,7 @@ dpif_linux_enumerate(struct svec *all_dps)
         struct dpif_linux_dp dp;
 
         if (!dpif_linux_dp_from_ofpbuf(&dp, &msg)) {
-            svec_add(all_dps, dp.name);
+            sset_add(all_dps, dp.name);
         }
     }
     return nl_dump_done(&dump);
@@ -231,10 +266,16 @@ open_dpif(const struct dpif_linux_dp *dp, struct dpif **dpifp)
     }
     dpif->listen_mask = 0;
     dpif->dp_ifindex = dp->dp_ifindex;
-    shash_init(&dpif->changed_ports);
+    sset_init(&dpif->changed_ports);
     dpif->change_error = false;
     *dpifp = &dpif->dpif;
 
+    dpif->lru_head = dpif->lru_tail = 0;
+    dpif->lru_bitmap = bitmap_allocate(LRU_MAX_PORTS);
+    bitmap_set1(dpif->lru_bitmap, ODPP_LOCAL);
+    for (i = 1; i < LRU_MAX_PORTS; i++) {
+        dpif_linux_push_port(dpif, i);
+    }
     return 0;
 
 error_free:
@@ -247,7 +288,8 @@ dpif_linux_close(struct dpif *dpif_)
 {
     struct dpif_linux *dpif = dpif_linux_cast(dpif_);
     rtnetlink_link_notifier_unregister(&dpif->port_notifier);
-    shash_destroy(&dpif->changed_ports);
+    sset_destroy(&dpif->changed_ports);
+    free(dpif->lru_bitmap);
     free(dpif);
 }
 
@@ -336,11 +378,17 @@ dpif_linux_port_add(struct dpif *dpif_, struct netdev *netdev,
         request.options_len = options->size;
     }
 
-    error = dpif_linux_vport_transact(&request, &reply, &buf);
-    if (!error) {
-        *port_nop = reply.port_no;
+    /* Loop until we find a port that isn't used. */
+    do {
+        request.port_no = dpif_linux_pop_port(dpif);
+        error = dpif_linux_vport_transact(&request, &reply, &buf);
+
+        if (!error) {
+            *port_nop = reply.port_no;
+        }
         ofpbuf_delete(buf);
-    }
+    } while (request.port_no != UINT32_MAX
+             && (error == EBUSY || error == EFBIG));
 
     return error;
 }
@@ -350,12 +398,18 @@ dpif_linux_port_del(struct dpif *dpif_, uint16_t port_no)
 {
     struct dpif_linux *dpif = dpif_linux_cast(dpif_);
     struct dpif_linux_vport vport;
+    int error;
 
     dpif_linux_vport_init(&vport);
     vport.cmd = ODP_VPORT_CMD_DEL;
     vport.dp_ifindex = dpif->dp_ifindex;
     vport.port_no = port_no;
-    return dpif_linux_vport_transact(&vport, NULL, NULL);
+    error = dpif_linux_vport_transact(&vport, NULL, NULL);
+
+    if (!error) {
+        dpif_linux_push_port(dpif, port_no);
+    }
+    return error;
 }
 
 static int
@@ -378,6 +432,12 @@ dpif_linux_port_query__(const struct dpif *dpif, uint32_t port_no,
         dpif_port->name = xstrdup(reply.name);
         dpif_port->type = xstrdup(netdev_vport_get_netdev_type(&reply));
         dpif_port->port_no = reply.port_no;
+        if (reply.stats) {
+            netdev_stats_from_rtnl_link_stats64(&dpif_port->stats,
+                                                reply.stats);
+        } else {
+            memset(&dpif_port->stats, 0xff, sizeof dpif_port->stats);
+        }
         ofpbuf_delete(buf);
     }
     return error;
@@ -419,6 +479,8 @@ dpif_linux_flow_flush(struct dpif *dpif_)
 
 struct dpif_linux_port_state {
     struct nl_dump dump;
+    unsigned long *port_bitmap; /* Ports in the datapath. */
+    bool complete;              /* Dump completed without error. */
 };
 
 static int
@@ -430,6 +492,8 @@ dpif_linux_port_dump_start(const struct dpif *dpif_, void **statep)
     struct ofpbuf *buf;
 
     *statep = state = xmalloc(sizeof *state);
+    state->port_bitmap = bitmap_allocate(LRU_MAX_PORTS);
+    state->complete = false;
 
     dpif_linux_vport_init(&request);
     request.cmd = ODP_DP_CMD_GET;
@@ -453,6 +517,7 @@ dpif_linux_port_dump_next(const struct dpif *dpif OVS_UNUSED, void *state_,
     int error;
 
     if (!nl_dump_next(&state->dump, &buf)) {
+        state->complete = true;
         return EOF;
     }
 
@@ -461,17 +526,39 @@ dpif_linux_port_dump_next(const struct dpif *dpif OVS_UNUSED, void *state_,
         return error;
     }
 
+    if (vport.port_no < LRU_MAX_PORTS) {
+        bitmap_set1(state->port_bitmap, vport.port_no);
+    }
+
     dpif_port->name = (char *) vport.name;
     dpif_port->type = (char *) netdev_vport_get_netdev_type(&vport);
     dpif_port->port_no = vport.port_no;
+    if (vport.stats) {
+        netdev_stats_from_rtnl_link_stats64(&dpif_port->stats, vport.stats);
+    } else {
+        memset(&dpif_port->stats, 0xff, sizeof dpif_port->stats);
+    }
     return 0;
 }
 
 static int
-dpif_linux_port_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_)
+dpif_linux_port_dump_done(const struct dpif *dpif_, void *state_)
 {
+    struct dpif_linux *dpif = dpif_linux_cast(dpif_);
     struct dpif_linux_port_state *state = state_;
     int error = nl_dump_done(&state->dump);
+
+    if (state->complete) {
+        uint16_t i;
+
+        for (i = 0; i < LRU_MAX_PORTS; i++) {
+            if (!bitmap_is_set(state->port_bitmap, i)) {
+                dpif_linux_push_port(dpif, i);
+            }
+        }
+    }
+
+    free(state->port_bitmap);
     free(state);
     return error;
 }
@@ -483,11 +570,10 @@ dpif_linux_port_poll(const struct dpif *dpif_, char **devnamep)
 
     if (dpif->change_error) {
         dpif->change_error = false;
-        shash_clear(&dpif->changed_ports);
+        sset_clear(&dpif->changed_ports);
         return ENOBUFS;
-    } else if (!shash_is_empty(&dpif->changed_ports)) {
-        struct shash_node *node = shash_first(&dpif->changed_ports);
-        *devnamep = shash_steal(&dpif->changed_ports, node);
+    } else if (!sset_is_empty(&dpif->changed_ports)) {
+        *devnamep = sset_pop(&dpif->changed_ports);
         return 0;
     } else {
         return EAGAIN;
@@ -498,7 +584,7 @@ static void
 dpif_linux_port_poll_wait(const struct dpif *dpif_)
 {
     struct dpif_linux *dpif = dpif_linux_cast(dpif_);
-    if (!shash_is_empty(&dpif->changed_ports) || dpif->change_error) {
+    if (!sset_is_empty(&dpif->changed_ports) || dpif->change_error) {
         poll_immediate_wake();
     } else {
         rtnetlink_link_notifier_wait();
@@ -942,12 +1028,12 @@ dpif_linux_recv_purge(struct dpif *dpif_)
 
 const struct dpif_class dpif_linux_class = {
     "system",
-    NULL,                       /* run */
-    NULL,                       /* wait */
     dpif_linux_enumerate,
     dpif_linux_open,
     dpif_linux_close,
     dpif_linux_destroy,
+    NULL,                       /* run */
+    NULL,                       /* wait */
     dpif_linux_get_stats,
     dpif_linux_get_drop_frags,
     dpif_linux_set_drop_frags,
@@ -1020,7 +1106,7 @@ dpif_linux_is_internal_device(const char *name)
     error = dpif_linux_vport_get(name, &reply, &buf);
     if (!error) {
         ofpbuf_delete(buf);
-    } else if (error != ENODEV) {
+    } else if (error != ENODEV && error != ENOENT) {
         VLOG_WARN_RL(&error_rl, "%s: vport query failed (%s)",
                      name, strerror(error));
     }
@@ -1028,6 +1114,34 @@ dpif_linux_is_internal_device(const char *name)
     return reply.type == ODP_VPORT_TYPE_INTERNAL;
 }
 
+int
+dpif_linux_vport_send(int dp_ifindex, uint32_t port_no,
+                      const void *data, size_t size)
+{
+    struct odp_header *execute;
+    struct ofpbuf *buf;
+    size_t actions_ofs;
+    int error;
+
+    buf = ofpbuf_new(128 + size);
+
+    nl_msg_put_genlmsghdr(buf, 0, odp_packet_family, NLM_F_REQUEST,
+                          ODP_PACKET_CMD_EXECUTE, 1);
+
+    execute = ofpbuf_put_uninit(buf, sizeof *execute);
+    execute->dp_ifindex = dp_ifindex;
+
+    nl_msg_put_unspec(buf, ODP_PACKET_ATTR_PACKET, data, size);
+
+    actions_ofs = nl_msg_start_nested(buf, ODP_PACKET_ATTR_ACTIONS);
+    nl_msg_put_u32(buf, ODP_ACTION_ATTR_OUTPUT, port_no);
+    nl_msg_end_nested(buf, actions_ofs);
+
+    error = nl_sock_transact(genl_sock, buf, NULL);
+    ofpbuf_delete(buf);
+    return error;
+}
+
 static void
 dpif_linux_port_changed(const struct rtnetlink_link_change *change,
                         void *dpif_)
@@ -1041,7 +1155,7 @@ dpif_linux_port_changed(const struct rtnetlink_link_change *change,
         {
             /* Our datapath changed, either adding a new port or deleting an
              * existing one. */
-            shash_add_once(&dpif->changed_ports, change->ifname, NULL);
+            sset_add(&dpif->changed_ports, change->ifname);
         }
     } else {
         dpif->change_error = true;
@@ -1108,6 +1222,8 @@ dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *vport,
     }
     if (a[ODP_VPORT_ATTR_MTU]) {
         vport->mtu = nl_attr_get_u32(a[ODP_VPORT_ATTR_MTU]);
+    } else {
+        vport->mtu = INT_MAX;
     }
     if (a[ODP_VPORT_ATTR_OPTIONS]) {
         vport->options = nl_attr_get(a[ODP_VPORT_ATTR_OPTIONS]);
@@ -1158,7 +1274,7 @@ dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *vport,
                           vport->address, ETH_ADDR_LEN);
     }
 
-    if (vport->mtu) {
+    if (vport->mtu && vport->mtu != INT_MAX) {
         nl_msg_put_u32(buf, ODP_VPORT_ATTR_MTU, vport->mtu);
     }
 
@@ -1200,6 +1316,15 @@ dpif_linux_vport_transact(const struct dpif_linux_vport *request,
 
     assert((reply != NULL) == (bufp != NULL));
 
+    error = dpif_linux_init();
+    if (error) {
+        if (reply) {
+            *bufp = NULL;
+            dpif_linux_vport_init(reply);
+        }
+        return error;
+    }
+
     request_buf = ofpbuf_new(1024);
     dpif_linux_vport_to_ofpbuf(request, request_buf);
     error = nl_sock_transact(genl_sock, request_buf, bufp);
@@ -1348,7 +1473,7 @@ dpif_linux_dp_to_ofpbuf(const struct dpif_linux_dp *dp, struct ofpbuf *buf)
 }
 
 /* Clears 'dp' to "empty" values. */
-void
+static void
 dpif_linux_dp_init(struct dpif_linux_dp *dp)
 {
     memset(dp, 0, sizeof *dp);
@@ -1375,7 +1500,7 @@ dpif_linux_dp_dump_start(struct nl_dump *dump)
  * result of the command is expected to be of the same form, which is decoded
  * and stored in '*reply' and '*bufp'.  The caller must free '*bufp' when the
  * reply is no longer needed ('reply' will contain pointers into '*bufp'). */
-int
+static int
 dpif_linux_dp_transact(const struct dpif_linux_dp *request,
                        struct dpif_linux_dp *reply, struct ofpbuf **bufp)
 {
@@ -1405,7 +1530,7 @@ dpif_linux_dp_transact(const struct dpif_linux_dp *request,
 /* Obtains information about 'dpif_' and stores it into '*reply' and '*bufp'.
  * The caller must free '*bufp' when the reply is no longer needed ('reply'
  * will contain pointers into '*bufp').  */
-int
+static int
 dpif_linux_dp_get(const struct dpif *dpif_, struct dpif_linux_dp *reply,
                   struct ofpbuf **bufp)
 {
@@ -1515,7 +1640,7 @@ dpif_linux_flow_to_ofpbuf(const struct dpif_linux_flow *flow,
 }
 
 /* Clears 'flow' to "empty" values. */
-void
+static void
 dpif_linux_flow_init(struct dpif_linux_flow *flow)
 {
     memset(flow, 0, sizeof *flow);
@@ -1527,7 +1652,7 @@ dpif_linux_flow_init(struct dpif_linux_flow *flow)
  * result of the command is expected to be a flow also, which is decoded and
  * stored in '*reply' and '*bufp'.  The caller must free '*bufp' when the reply
  * is no longer needed ('reply' will contain pointers into '*bufp'). */
-int
+static int
 dpif_linux_flow_transact(const struct dpif_linux_flow *request,
                          struct dpif_linux_flow *reply, struct ofpbuf **bufp)
 {