tipc: add link get/dump to new netlink api

Add TIPC_NL_LINK_GET command to the new tipc netlink API.

This command supports dumping all information about all links
(including the broadcast link) or getting all information about a
specific link (not the broadcast link).

The information about a link includes name, transmission info,
properties and link statistics.

As the tipc broadcast link is special we unfortunately have to treat
it specially. It is a deliberate decision not to abstract the
broadcast link on this (API) level.

Netlink logical layout of link response message:
    -> port
        -> name
        -> MTU
        -> RX
        -> TX
        -> up flag
        -> active flag
        -> properties
           -> priority
           -> tolerance
           -> window
        -> statistics
            -> rx_info
            -> rx_fragments
            -> rx_fragmented
            -> rx_bundles
            -> rx_bundled
            -> tx_info
            -> tx_fragments
            -> tx_fragmented
            -> tx_bundles
            -> tx_bundled
            -> msg_prof_tot
            -> msg_len_cnt
            -> msg_len_tot
            -> msg_len_p0
            -> msg_len_p1
            -> msg_len_p2
            -> msg_len_p3
            -> msg_len_p4
            -> msg_len_p5
            -> msg_len_p6
            -> rx_states
            -> rx_probes
            -> rx_nacks
            -> rx_deferred
            -> tx_states
            -> tx_probes
            -> tx_nacks
            -> tx_acks
            -> retransmitted
            -> duplicates
            -> link_congs
            -> max_queue
            -> avg_queue

Signed-off-by: Richard Alpe <richard.alpe@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 62 insertions, 0 deletions

diff --git a/include/uapi/linux/tipc_netlink.h b/include/uapi/linux/tipc_netlink.h
index 7e51ff61dccd..1034fb43d32e 100644
--- a/include/uapi/linux/tipc_netlink.h
+++ b/include/uapi/linux/tipc_netlink.h
@@ -47,6 +47,7 @@ enum {
         TIPC_NL_BEARER_SET,
         TIPC_NL_SOCK_GET,
         TIPC_NL_PUBL_GET,
+        TIPC_NL_LINK_GET,
 
         __TIPC_NL_CMD_MAX,
         TIPC_NL_CMD_MAX = __TIPC_NL_CMD_MAX - 1
@@ -58,6 +59,7 @@ enum {
         TIPC_NLA_BEARER,                /* nest */
         TIPC_NLA_SOCK,                  /* nest */
         TIPC_NLA_PUBL,                  /* nest */
+        TIPC_NLA_LINK,                  /* nest */
 
         __TIPC_NLA_MAX,
         TIPC_NLA_MAX = __TIPC_NLA_MAX - 1
@@ -86,6 +88,24 @@ enum {
         TIPC_NLA_SOCK_MAX = __TIPC_NLA_SOCK_MAX - 1
 };
 
+/* Link info */
+enum {
+        TIPC_NLA_LINK_UNSPEC,
+        TIPC_NLA_LINK_NAME,             /* string */
+        TIPC_NLA_LINK_DEST,             /* u32 */
+        TIPC_NLA_LINK_MTU,              /* u32 */
+        TIPC_NLA_LINK_BROADCAST,        /* flag */
+        TIPC_NLA_LINK_UP,               /* flag */
+        TIPC_NLA_LINK_ACTIVE,           /* flag */
+        TIPC_NLA_LINK_PROP,             /* nest */
+        TIPC_NLA_LINK_STATS,            /* nest */
+        TIPC_NLA_LINK_RX,               /* u32 */
+        TIPC_NLA_LINK_TX,               /* u32 */
+
+        __TIPC_NLA_LINK_MAX,
+        TIPC_NLA_LINK_MAX = __TIPC_NLA_LINK_MAX - 1
+};
+
 /* Publication info */
 enum {
         TIPC_NLA_PUBL_UNSPEC,
@@ -128,4 +148,46 @@ enum {
         TIPC_NLA_PROP_MAX = __TIPC_NLA_PROP_MAX - 1
 };
 
+/* Nest, statistics info */
+enum {
+        TIPC_NLA_STATS_UNSPEC,
+
+        TIPC_NLA_STATS_RX_INFO,         /* u32 */
+        TIPC_NLA_STATS_RX_FRAGMENTS,    /* u32 */
+        TIPC_NLA_STATS_RX_FRAGMENTED,   /* u32 */
+        TIPC_NLA_STATS_RX_BUNDLES,      /* u32 */
+        TIPC_NLA_STATS_RX_BUNDLED,      /* u32 */
+        TIPC_NLA_STATS_TX_INFO,         /* u32 */
+        TIPC_NLA_STATS_TX_FRAGMENTS,    /* u32 */
+        TIPC_NLA_STATS_TX_FRAGMENTED,   /* u32 */
+        TIPC_NLA_STATS_TX_BUNDLES,      /* u32 */
+        TIPC_NLA_STATS_TX_BUNDLED,      /* u32 */
+        TIPC_NLA_STATS_MSG_PROF_TOT,    /* u32 */
+        TIPC_NLA_STATS_MSG_LEN_CNT,     /* u32 */
+        TIPC_NLA_STATS_MSG_LEN_TOT,     /* u32 */
+        TIPC_NLA_STATS_MSG_LEN_P0,      /* u32 */
+        TIPC_NLA_STATS_MSG_LEN_P1,      /* u32 */
+        TIPC_NLA_STATS_MSG_LEN_P2,      /* u32 */
+        TIPC_NLA_STATS_MSG_LEN_P3,      /* u32 */
+        TIPC_NLA_STATS_MSG_LEN_P4,      /* u32 */
+        TIPC_NLA_STATS_MSG_LEN_P5,      /* u32 */
+        TIPC_NLA_STATS_MSG_LEN_P6,      /* u32 */
+        TIPC_NLA_STATS_RX_STATES,       /* u32 */
+        TIPC_NLA_STATS_RX_PROBES,       /* u32 */
+        TIPC_NLA_STATS_RX_NACKS,        /* u32 */
+        TIPC_NLA_STATS_RX_DEFERRED,     /* u32 */
+        TIPC_NLA_STATS_TX_STATES,       /* u32 */
+        TIPC_NLA_STATS_TX_PROBES,       /* u32 */
+        TIPC_NLA_STATS_TX_NACKS,        /* u32 */
+        TIPC_NLA_STATS_TX_ACKS,         /* u32 */
+        TIPC_NLA_STATS_RETRANSMITTED,   /* u32 */
+        TIPC_NLA_STATS_DUPLICATES,      /* u32 */
+        TIPC_NLA_STATS_LINK_CONGS,      /* u32 */
+        TIPC_NLA_STATS_MAX_QUEUE,       /* u32 */
+        TIPC_NLA_STATS_AVG_QUEUE,       /* u32 */
+
+        __TIPC_NLA_STATS_MAX,
+        TIPC_NLA_STATS_MAX = __TIPC_NLA_STATS_MAX - 1
+};
+
 #endif