[PKT_SCHED]: Allow socket attributes to be matched on via meta ematch

Adds meta collectors for all socket attributes that make sense
to be filtered upon. Some of them are only useful for debugging
but having them doesn't hurt.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/tc_ematch/tc_em_meta.h b/include/linux/tc_ematch/tc_em_meta.h
index aa6b48bb4dcd0c1fbeec59278d84eb3e15244da0..a6b2cc530af5e1be70ed02d2cf05240c2894c297 100644 (file)
--- a/include/linux/tc_ematch/tc_em_meta.h
+++ b/include/linux/tc_ematch/tc_em_meta.h
@@ -56,6 +56,36 @@ enum
        TCF_META_ID_TCCLASSID,
        TCF_META_ID_RTCLASSID,
        TCF_META_ID_RTIIF,
+       TCF_META_ID_SK_FAMILY,
+       TCF_META_ID_SK_STATE,
+       TCF_META_ID_SK_REUSE,
+       TCF_META_ID_SK_BOUND_IF,
+       TCF_META_ID_SK_REFCNT,
+       TCF_META_ID_SK_SHUTDOWN,
+       TCF_META_ID_SK_PROTO,
+       TCF_META_ID_SK_TYPE,
+       TCF_META_ID_SK_RCVBUF,
+       TCF_META_ID_SK_RMEM_ALLOC,
+       TCF_META_ID_SK_WMEM_ALLOC,
+       TCF_META_ID_SK_OMEM_ALLOC,
+       TCF_META_ID_SK_WMEM_QUEUED,
+       TCF_META_ID_SK_RCV_QLEN,
+       TCF_META_ID_SK_SND_QLEN,
+       TCF_META_ID_SK_ERR_QLEN,
+       TCF_META_ID_SK_FORWARD_ALLOCS,
+       TCF_META_ID_SK_SNDBUF,
+       TCF_META_ID_SK_ALLOCS,
+       TCF_META_ID_SK_ROUTE_CAPS,
+       TCF_META_ID_SK_HASHENT,
+       TCF_META_ID_SK_LINGERTIME,
+       TCF_META_ID_SK_ACK_BACKLOG,
+       TCF_META_ID_SK_MAX_ACK_BACKLOG,
+       TCF_META_ID_SK_PRIO,
+       TCF_META_ID_SK_RCVLOWAT,
+       TCF_META_ID_SK_RCVTIMEO,
+       TCF_META_ID_SK_SNDTIMEO,
+       TCF_META_ID_SK_SENDMSG_OFF,
+       TCF_META_ID_SK_WRITE_PENDING,
        __TCF_META_ID_MAX
 };
 #define TCF_META_ID_MAX (__TCF_META_ID_MAX - 1)

diff --git a/net/sched/em_meta.c b/net/sched/em_meta.c
index f1eeaf65cee5f833aabb493c53442ef80e983eef..ed2a46cbb67f23ee3e20f917e233220ad71c52f1 100644 (file)
--- a/net/sched/em_meta.c
+++ b/net/sched/em_meta.c
@@ -32,7 +32,7 @@
  *           +-----------+                           +-----------+
  *                 |                                       |
  *                 ---> meta_ops[INT][INDEV](...)          |
- *                            |                            |
+ *                           |                             |
  *                 -----------                             |
  *                 V                                       V
  *           +-----------+                           +-----------+
@@ -70,6 +70,7 @@
 #include <net/dst.h>
 #include <net/route.h>
 #include <net/pkt_cls.h>
+#include <net/sock.h>
 
 struct meta_obj
 {
@@ -283,6 +284,214 @@ META_COLLECTOR(int_rtiif)
                dst->value = ((struct rtable*) skb->dst)->fl.iif;
 }
 
+/**************************************************************************
+ * Socket Attributes
+ **************************************************************************/
+
+#define SKIP_NONLOCAL(skb)                     \
+       if (unlikely(skb->sk == NULL)) {        \
+               *err = -1;                      \
+               return;                         \
+       }
+
+META_COLLECTOR(int_sk_family)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_family;
+}
+
+META_COLLECTOR(int_sk_state)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_state;
+}
+
+META_COLLECTOR(int_sk_reuse)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_reuse;
+}
+
+META_COLLECTOR(int_sk_bound_if)
+{
+       SKIP_NONLOCAL(skb);
+       /* No error if bound_dev_if is 0, legal userspace check */
+       dst->value = skb->sk->sk_bound_dev_if;
+}
+
+META_COLLECTOR(var_sk_bound_if)
+{
+       SKIP_NONLOCAL(skb);
+
+        if (skb->sk->sk_bound_dev_if == 0) {
+               dst->value = (unsigned long) "any";
+               dst->len = 3;
+        } else  {
+               struct net_device *dev;
+               
+               dev = dev_get_by_index(skb->sk->sk_bound_dev_if);
+               *err = var_dev(dev, dst);
+               if (dev)
+                       dev_put(dev);
+        }
+}
+
+META_COLLECTOR(int_sk_refcnt)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = atomic_read(&skb->sk->sk_refcnt);
+}
+
+META_COLLECTOR(int_sk_rcvbuf)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_rcvbuf;
+}
+
+META_COLLECTOR(int_sk_shutdown)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_shutdown;
+}
+
+META_COLLECTOR(int_sk_proto)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_protocol;
+}
+
+META_COLLECTOR(int_sk_type)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_type;
+}
+
+META_COLLECTOR(int_sk_rmem_alloc)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = atomic_read(&skb->sk->sk_rmem_alloc);
+}
+
+META_COLLECTOR(int_sk_wmem_alloc)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = atomic_read(&skb->sk->sk_wmem_alloc);
+}
+
+META_COLLECTOR(int_sk_omem_alloc)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = atomic_read(&skb->sk->sk_omem_alloc);
+}
+
+META_COLLECTOR(int_sk_rcv_qlen)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_receive_queue.qlen;
+}
+
+META_COLLECTOR(int_sk_snd_qlen)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_write_queue.qlen;
+}
+
+META_COLLECTOR(int_sk_wmem_queued)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_wmem_queued;
+}
+
+META_COLLECTOR(int_sk_fwd_alloc)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_forward_alloc;
+}
+
+META_COLLECTOR(int_sk_sndbuf)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_sndbuf;
+}
+
+META_COLLECTOR(int_sk_alloc)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_allocation;
+}
+
+META_COLLECTOR(int_sk_route_caps)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_route_caps;
+}
+
+META_COLLECTOR(int_sk_hashent)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_hashent;
+}
+
+META_COLLECTOR(int_sk_lingertime)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_lingertime / HZ;
+}
+
+META_COLLECTOR(int_sk_err_qlen)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_error_queue.qlen;
+}
+
+META_COLLECTOR(int_sk_ack_bl)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_ack_backlog;
+}
+
+META_COLLECTOR(int_sk_max_ack_bl)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_max_ack_backlog;
+}
+
+META_COLLECTOR(int_sk_prio)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_priority;
+}
+
+META_COLLECTOR(int_sk_rcvlowat)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_rcvlowat;
+}
+
+META_COLLECTOR(int_sk_rcvtimeo)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_rcvtimeo / HZ;
+}
+
+META_COLLECTOR(int_sk_sndtimeo)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_sndtimeo / HZ;
+}
+
+META_COLLECTOR(int_sk_sendmsg_off)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_sndmsg_off;
+}
+
+META_COLLECTOR(int_sk_write_pend)
+{
+       SKIP_NONLOCAL(skb);
+       dst->value = skb->sk->sk_write_pending;
+}
+
 /**************************************************************************
  * Meta value collectors assignment table
  **************************************************************************/
@@ -293,41 +502,75 @@ struct meta_ops
                               struct meta_value *, struct meta_obj *, int *);
 };
 
+#define META_ID(name) TCF_META_ID_##name
+#define META_FUNC(name) { .get = meta_##name }
+
 /* Meta value operations table listing all meta value collectors and
  * assigns them to a type and meta id. */
 static struct meta_ops __meta_ops[TCF_META_TYPE_MAX+1][TCF_META_ID_MAX+1] = {
        [TCF_META_TYPE_VAR] = {
-               [TCF_META_ID_DEV]       = { .get = meta_var_dev },
-               [TCF_META_ID_INDEV]     = { .get = meta_var_indev },
-               [TCF_META_ID_REALDEV]   = { .get = meta_var_realdev }
+               [META_ID(DEV)]                  = META_FUNC(var_dev),
+               [META_ID(INDEV)]                = META_FUNC(var_indev),
+               [META_ID(REALDEV)]              = META_FUNC(var_realdev),
+               [META_ID(SK_BOUND_IF)]          = META_FUNC(var_sk_bound_if),
        },
        [TCF_META_TYPE_INT] = {
-               [TCF_META_ID_RANDOM]    = { .get = meta_int_random },
-               [TCF_META_ID_LOADAVG_0] = { .get = meta_int_loadavg_0 },
-               [TCF_META_ID_LOADAVG_1] = { .get = meta_int_loadavg_1 },
-               [TCF_META_ID_LOADAVG_2] = { .get = meta_int_loadavg_2 },
-               [TCF_META_ID_DEV]       = { .get = meta_int_dev },
-               [TCF_META_ID_INDEV]     = { .get = meta_int_indev },
-               [TCF_META_ID_REALDEV]   = { .get = meta_int_realdev },
-               [TCF_META_ID_PRIORITY]  = { .get = meta_int_priority },
-               [TCF_META_ID_PROTOCOL]  = { .get = meta_int_protocol },
-               [TCF_META_ID_SECURITY]  = { .get = meta_int_security },
-               [TCF_META_ID_PKTTYPE]   = { .get = meta_int_pkttype },
-               [TCF_META_ID_PKTLEN]    = { .get = meta_int_pktlen },
-               [TCF_META_ID_DATALEN]   = { .get = meta_int_datalen },
-               [TCF_META_ID_MACLEN]    = { .get = meta_int_maclen },
+               [META_ID(RANDOM)]               = META_FUNC(int_random),
+               [META_ID(LOADAVG_0)]            = META_FUNC(int_loadavg_0),
+               [META_ID(LOADAVG_1)]            = META_FUNC(int_loadavg_1),
+               [META_ID(LOADAVG_2)]            = META_FUNC(int_loadavg_2),
+               [META_ID(DEV)]                  = META_FUNC(int_dev),
+               [META_ID(INDEV)]                = META_FUNC(int_indev),
+               [META_ID(REALDEV)]              = META_FUNC(int_realdev),
+               [META_ID(PRIORITY)]             = META_FUNC(int_priority),
+               [META_ID(PROTOCOL)]             = META_FUNC(int_protocol),
+               [META_ID(SECURITY)]             = META_FUNC(int_security),
+               [META_ID(PKTTYPE)]              = META_FUNC(int_pkttype),
+               [META_ID(PKTLEN)]               = META_FUNC(int_pktlen),
+               [META_ID(DATALEN)]              = META_FUNC(int_datalen),
+               [META_ID(MACLEN)]               = META_FUNC(int_maclen),
 #ifdef CONFIG_NETFILTER
-               [TCF_META_ID_NFMARK]    = { .get = meta_int_nfmark },
+               [META_ID(NFMARK)]               = META_FUNC(int_nfmark),
 #endif
-               [TCF_META_ID_TCINDEX]   = { .get = meta_int_tcindex },
+               [META_ID(TCINDEX)]              = META_FUNC(int_tcindex),
 #ifdef CONFIG_NET_CLS_ACT
-               [TCF_META_ID_TCVERDICT] = { .get = meta_int_tcverd },
-               [TCF_META_ID_TCCLASSID] = { .get = meta_int_tcclassid },
+               [META_ID(TCVERDICT)]            = META_FUNC(int_tcverd),
+               [META_ID(TCCLASSID)]            = META_FUNC(int_tcclassid),
 #endif
 #ifdef CONFIG_NET_CLS_ROUTE
-               [TCF_META_ID_RTCLASSID] = { .get = meta_int_rtclassid },
+               [META_ID(RTCLASSID)]            = META_FUNC(int_rtclassid),
 #endif
-               [TCF_META_ID_RTIIF]     = { .get = meta_int_rtiif }
+               [META_ID(RTIIF)]                = META_FUNC(int_rtiif),
+               [META_ID(SK_FAMILY)]            = META_FUNC(int_sk_family),
+               [META_ID(SK_STATE)]             = META_FUNC(int_sk_state),
+               [META_ID(SK_REUSE)]             = META_FUNC(int_sk_reuse),
+               [META_ID(SK_BOUND_IF)]          = META_FUNC(int_sk_bound_if),
+               [META_ID(SK_REFCNT)]            = META_FUNC(int_sk_refcnt),
+               [META_ID(SK_RCVBUF)]            = META_FUNC(int_sk_rcvbuf),
+               [META_ID(SK_SNDBUF)]            = META_FUNC(int_sk_sndbuf),
+               [META_ID(SK_SHUTDOWN)]          = META_FUNC(int_sk_shutdown),
+               [META_ID(SK_PROTO)]             = META_FUNC(int_sk_proto),
+               [META_ID(SK_TYPE)]              = META_FUNC(int_sk_type),
+               [META_ID(SK_RMEM_ALLOC)]        = META_FUNC(int_sk_rmem_alloc),
+               [META_ID(SK_WMEM_ALLOC)]        = META_FUNC(int_sk_wmem_alloc),
+               [META_ID(SK_OMEM_ALLOC)]        = META_FUNC(int_sk_omem_alloc),
+               [META_ID(SK_WMEM_QUEUED)]       = META_FUNC(int_sk_wmem_queued),
+               [META_ID(SK_RCV_QLEN)]          = META_FUNC(int_sk_rcv_qlen),
+               [META_ID(SK_SND_QLEN)]          = META_FUNC(int_sk_snd_qlen),
+               [META_ID(SK_ERR_QLEN)]          = META_FUNC(int_sk_err_qlen),
+               [META_ID(SK_FORWARD_ALLOCS)]    = META_FUNC(int_sk_fwd_alloc),
+               [META_ID(SK_ALLOCS)]            = META_FUNC(int_sk_alloc),
+               [META_ID(SK_ROUTE_CAPS)]        = META_FUNC(int_sk_route_caps),
+               [META_ID(SK_HASHENT)]           = META_FUNC(int_sk_hashent),
+               [META_ID(SK_LINGERTIME)]        = META_FUNC(int_sk_lingertime),
+               [META_ID(SK_ACK_BACKLOG)]       = META_FUNC(int_sk_ack_bl),
+               [META_ID(SK_MAX_ACK_BACKLOG)]   = META_FUNC(int_sk_max_ack_bl),
+               [META_ID(SK_PRIO)]              = META_FUNC(int_sk_prio),
+               [META_ID(SK_RCVLOWAT)]          = META_FUNC(int_sk_rcvlowat),
+               [META_ID(SK_RCVTIMEO)]          = META_FUNC(int_sk_rcvtimeo),
+               [META_ID(SK_SNDTIMEO)]          = META_FUNC(int_sk_sndtimeo),
+               [META_ID(SK_SENDMSG_OFF)]       = META_FUNC(int_sk_sendmsg_off),
+               [META_ID(SK_WRITE_PENDING)]     = META_FUNC(int_sk_write_pend),
        }
 };