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Message-ID: <1423471819-23112-5-git-send-email-richard.alpe@ericsson.com> Date: Mon, 9 Feb 2015 09:50:06 +0100 From: <richard.alpe@...csson.com> To: <netdev@...r.kernel.org> CC: <tipc-discussion@...ts.sourceforge.net>, Richard Alpe <richard.alpe@...csson.com> Subject: [PATCH net-next v1 04/17] tipc: convert legacy nl link stat to nl compat From: Richard Alpe <richard.alpe@...csson.com> Add functionality for safely appending string data to a TLV without keeping write count in the caller. Convert TIPC_CMD_SHOW_LINK_STATS to compat dumpit. Signed-off-by: Richard Alpe <richard.alpe@...csson.com> Reviewed-by: Erik Hugne <erik.hugne@...csson.com> Reviewed-by: Ying Xue <ying.xue@...driver.com> Reviewed-by: Jon Maloy <jon.maloy@...csson.com> --- include/uapi/linux/tipc_config.h | 10 ++ net/tipc/bcast.c | 43 -------- net/tipc/bcast.h | 1 - net/tipc/config.c | 4 - net/tipc/link.c | 141 --------------------------- net/tipc/link.h | 3 - net/tipc/netlink_compat.c | 205 +++++++++++++++++++++++++++++++++++++++ 7 files changed, 215 insertions(+), 192 deletions(-) diff --git a/include/uapi/linux/tipc_config.h b/include/uapi/linux/tipc_config.h index f922656..087b0ef 100644 --- a/include/uapi/linux/tipc_config.h +++ b/include/uapi/linux/tipc_config.h @@ -277,11 +277,21 @@ static inline int TLV_GET_LEN(struct tlv_desc *tlv) return ntohs(tlv->tlv_len); } +static inline void TLV_SET_LEN(struct tlv_desc *tlv, __u16 len) +{ + tlv->tlv_len = htons(len); +} + static inline int TLV_CHECK_TYPE(struct tlv_desc *tlv, __u16 type) { return (ntohs(tlv->tlv_type) == type); } +static inline void TLV_SET_TYPE(struct tlv_desc *tlv, __u16 type) +{ + tlv->tlv_type = htons(type); +} + static inline int TLV_SET(void *tlv, __u16 type, void *data, __u16 len) { struct tlv_desc *tlv_ptr; diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c index e96fd6a..3e41704 100644 --- a/net/tipc/bcast.c +++ b/net/tipc/bcast.c @@ -860,49 +860,6 @@ msg_full: return -EMSGSIZE; } -int tipc_bclink_stats(struct net *net, char *buf, const u32 buf_size) -{ - int ret; - struct tipc_stats *s; - struct tipc_net *tn = net_generic(net, tipc_net_id); - struct tipc_link *bcl = tn->bcl; - - if (!bcl) - return 0; - - tipc_bclink_lock(net); - - s = &bcl->stats; - - ret = tipc_snprintf(buf, buf_size, "Link <%s>\n" - " Window:%u packets\n", - bcl->name, bcl->queue_limit[0]); - ret += tipc_snprintf(buf + ret, buf_size - ret, - " RX packets:%u fragments:%u/%u bundles:%u/%u\n", - s->recv_info, s->recv_fragments, - s->recv_fragmented, s->recv_bundles, - s->recv_bundled); - ret += tipc_snprintf(buf + ret, buf_size - ret, - " TX packets:%u fragments:%u/%u bundles:%u/%u\n", - s->sent_info, s->sent_fragments, - s->sent_fragmented, s->sent_bundles, - s->sent_bundled); - ret += tipc_snprintf(buf + ret, buf_size - ret, - " RX naks:%u defs:%u dups:%u\n", - s->recv_nacks, s->deferred_recv, s->duplicates); - ret += tipc_snprintf(buf + ret, buf_size - ret, - " TX naks:%u acks:%u dups:%u\n", - s->sent_nacks, s->sent_acks, s->retransmitted); - ret += tipc_snprintf(buf + ret, buf_size - ret, - " Congestion link:%u Send queue max:%u avg:%u\n", - s->link_congs, s->max_queue_sz, - s->queue_sz_counts ? - (s->accu_queue_sz / s->queue_sz_counts) : 0); - - tipc_bclink_unlock(net); - return ret; -} - int tipc_bclink_reset_stats(struct net *net) { struct tipc_net *tn = net_generic(net, tipc_net_id); diff --git a/net/tipc/bcast.h b/net/tipc/bcast.h index a910c0b..43f397f 100644 --- a/net/tipc/bcast.h +++ b/net/tipc/bcast.h @@ -127,7 +127,6 @@ u32 tipc_bclink_get_last_sent(struct net *net); u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr); void tipc_bclink_update_link_state(struct tipc_node *node, u32 last_sent); -int tipc_bclink_stats(struct net *net, char *stats_buf, const u32 buf_size); int tipc_bclink_reset_stats(struct net *net); int tipc_bclink_set_queue_limits(struct net *net, u32 limit); void tipc_bcbearer_sort(struct net *net, struct tipc_node_map *nm_ptr, diff --git a/net/tipc/config.c b/net/tipc/config.c index f8cd5e1..67b76ee 100644 --- a/net/tipc/config.c +++ b/net/tipc/config.c @@ -213,10 +213,6 @@ struct sk_buff *tipc_cfg_do_cmd(struct net *net, u32 orig_node, u16 cmd, rep_tlv_buf = tipc_node_get_links(net, req_tlv_area, req_tlv_space); break; - case TIPC_CMD_SHOW_LINK_STATS: - rep_tlv_buf = tipc_link_cmd_show_stats(net, req_tlv_area, - req_tlv_space); - break; case TIPC_CMD_RESET_LINK_STATS: rep_tlv_buf = tipc_link_cmd_reset_stats(net, req_tlv_area, req_tlv_space); diff --git a/net/tipc/link.c b/net/tipc/link.c index 466f28f..2622fb9 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -2146,147 +2146,6 @@ struct sk_buff *tipc_link_cmd_reset_stats(struct net *net, return tipc_cfg_reply_none(); } -/** - * percent - convert count to a percentage of total (rounding up or down) - */ -static u32 percent(u32 count, u32 total) -{ - return (count * 100 + (total / 2)) / total; -} - -/** - * tipc_link_stats - print link statistics - * @net: the applicable net namespace - * @name: link name - * @buf: print buffer area - * @buf_size: size of print buffer area - * - * Returns length of print buffer data string (or 0 if error) - */ -static int tipc_link_stats(struct net *net, const char *name, char *buf, - const u32 buf_size) -{ - struct tipc_link *l; - struct tipc_stats *s; - struct tipc_node *node; - char *status; - u32 profile_total = 0; - unsigned int bearer_id; - int ret; - - if (!strcmp(name, tipc_bclink_name)) - return tipc_bclink_stats(net, buf, buf_size); - - node = tipc_link_find_owner(net, name, &bearer_id); - if (!node) - return 0; - - tipc_node_lock(node); - - l = node->links[bearer_id]; - if (!l) { - tipc_node_unlock(node); - return 0; - } - - s = &l->stats; - - if (tipc_link_is_active(l)) - status = "ACTIVE"; - else if (tipc_link_is_up(l)) - status = "STANDBY"; - else - status = "DEFUNCT"; - - ret = tipc_snprintf(buf, buf_size, "Link <%s>\n" - " %s MTU:%u Priority:%u Tolerance:%u ms" - " Window:%u packets\n", - l->name, status, l->max_pkt, l->priority, - l->tolerance, l->queue_limit[0]); - - ret += tipc_snprintf(buf + ret, buf_size - ret, - " RX packets:%u fragments:%u/%u bundles:%u/%u\n", - l->next_in_no - s->recv_info, s->recv_fragments, - s->recv_fragmented, s->recv_bundles, - s->recv_bundled); - - ret += tipc_snprintf(buf + ret, buf_size - ret, - " TX packets:%u fragments:%u/%u bundles:%u/%u\n", - l->next_out_no - s->sent_info, s->sent_fragments, - s->sent_fragmented, s->sent_bundles, - s->sent_bundled); - - profile_total = s->msg_length_counts; - if (!profile_total) - profile_total = 1; - - ret += tipc_snprintf(buf + ret, buf_size - ret, - " TX profile sample:%u packets average:%u octets\n" - " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% " - "-16384:%u%% -32768:%u%% -66000:%u%%\n", - s->msg_length_counts, - s->msg_lengths_total / profile_total, - percent(s->msg_length_profile[0], profile_total), - percent(s->msg_length_profile[1], profile_total), - percent(s->msg_length_profile[2], profile_total), - percent(s->msg_length_profile[3], profile_total), - percent(s->msg_length_profile[4], profile_total), - percent(s->msg_length_profile[5], profile_total), - percent(s->msg_length_profile[6], profile_total)); - - ret += tipc_snprintf(buf + ret, buf_size - ret, - " RX states:%u probes:%u naks:%u defs:%u" - " dups:%u\n", s->recv_states, s->recv_probes, - s->recv_nacks, s->deferred_recv, s->duplicates); - - ret += tipc_snprintf(buf + ret, buf_size - ret, - " TX states:%u probes:%u naks:%u acks:%u" - " dups:%u\n", s->sent_states, s->sent_probes, - s->sent_nacks, s->sent_acks, s->retransmitted); - - ret += tipc_snprintf(buf + ret, buf_size - ret, - " Congestion link:%u Send queue" - " max:%u avg:%u\n", s->link_congs, - s->max_queue_sz, s->queue_sz_counts ? - (s->accu_queue_sz / s->queue_sz_counts) : 0); - - tipc_node_unlock(node); - return ret; -} - -struct sk_buff *tipc_link_cmd_show_stats(struct net *net, - const void *req_tlv_area, - int req_tlv_space) -{ - struct sk_buff *buf; - struct tlv_desc *rep_tlv; - int str_len; - int pb_len; - char *pb; - - if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_LINK_NAME)) - return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); - - buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN)); - if (!buf) - return NULL; - - rep_tlv = (struct tlv_desc *)buf->data; - pb = TLV_DATA(rep_tlv); - pb_len = ULTRA_STRING_MAX_LEN; - str_len = tipc_link_stats(net, (char *)TLV_DATA(req_tlv_area), - pb, pb_len); - if (!str_len) { - kfree_skb(buf); - return tipc_cfg_reply_error_string("link not found"); - } - str_len += 1; /* for "\0" */ - skb_put(buf, TLV_SPACE(str_len)); - TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); - - return buf; -} - static void link_print(struct tipc_link *l_ptr, const char *str) { struct tipc_net *tn = net_generic(l_ptr->owner->net, tipc_net_id); diff --git a/net/tipc/link.h b/net/tipc/link.h index 34d3f55..8c8340c 100644 --- a/net/tipc/link.h +++ b/net/tipc/link.h @@ -217,9 +217,6 @@ int tipc_link_is_active(struct tipc_link *l_ptr); void tipc_link_purge_queues(struct tipc_link *l_ptr); struct sk_buff *tipc_link_cmd_config(struct net *net, const void *req_tlv_area, int req_tlv_space, u16 cmd); -struct sk_buff *tipc_link_cmd_show_stats(struct net *net, - const void *req_tlv_area, - int req_tlv_space); struct sk_buff *tipc_link_cmd_reset_stats(struct net *net, const void *req_tlv_area, int req_tlv_space); diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c index 12b0f44..899bd94 100644 --- a/net/tipc/netlink_compat.c +++ b/net/tipc/netlink_compat.c @@ -34,6 +34,7 @@ #include "core.h" #include "config.h" #include "bearer.h" +#include "link.h" #include <net/genetlink.h> #include <linux/tipc_config.h> @@ -48,6 +49,7 @@ struct tipc_nl_compat_msg { u16 cmd; + int rep_type; int rep_size; int req_type; struct sk_buff *rep; @@ -95,6 +97,40 @@ static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len) return 0; } +static void tipc_tlv_init(struct sk_buff *skb, u16 type) +{ + struct tlv_desc *tlv = (struct tlv_desc *)skb->data; + + TLV_SET_LEN(tlv, 0); + TLV_SET_TYPE(tlv, type); + skb_put(skb, sizeof(struct tlv_desc)); +} + +static int tipc_tlv_sprintf(struct sk_buff *skb, const char *fmt, ...) +{ + int n; + u16 len; + u32 rem; + char *buf; + struct tlv_desc *tlv; + va_list args; + + rem = tipc_skb_tailroom(skb); + + tlv = (struct tlv_desc *)skb->data; + len = TLV_GET_LEN(tlv); + buf = TLV_DATA(tlv) + len; + + va_start(args, fmt); + n = vscnprintf(buf, rem, fmt, args); + va_end(args); + + TLV_SET_LEN(tlv, n + len); + skb_put(skb, n); + + return n; +} + static struct sk_buff *tipc_tlv_alloc(int size) { int hdr_len; @@ -200,10 +236,16 @@ static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, int err; struct sk_buff *arg; + if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type)) + return -EINVAL; + msg->rep = tipc_tlv_alloc(msg->rep_size); if (!msg->rep) return -ENOMEM; + if (msg->rep_type) + tipc_tlv_init(msg->rep, msg->rep_type); + arg = nlmsg_new(0, GFP_KERNEL); if (!arg) { kfree_skb(msg->rep); @@ -356,6 +398,161 @@ static int tipc_nl_compat_bearer_disable(struct sk_buff *skb, return 0; } +static inline u32 perc(u32 count, u32 total) +{ + return (count * 100 + (total / 2)) / total; +} + +static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg, + struct nlattr *prop[], struct nlattr *stats[]) +{ + tipc_tlv_sprintf(msg->rep, " Window:%u packets\n", + nla_get_u32(prop[TIPC_NLA_PROP_WIN])); + + tipc_tlv_sprintf(msg->rep, + " RX packets:%u fragments:%u/%u bundles:%u/%u\n", + nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), + nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), + nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), + nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), + nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); + + tipc_tlv_sprintf(msg->rep, + " TX packets:%u fragments:%u/%u bundles:%u/%u\n", + nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), + nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), + nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), + nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), + nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); + + tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n", + nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), + nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), + nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); + + tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n", + nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), + nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), + nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); + + tipc_tlv_sprintf(msg->rep, + " Congestion link:%u Send queue max:%u avg:%u", + nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), + nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), + nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); +} + +static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg, + struct nlattr **attrs) +{ + char *name; + struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; + struct nlattr *prop[TIPC_NLA_PROP_MAX + 1]; + struct nlattr *stats[TIPC_NLA_STATS_MAX + 1]; + + nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL); + + nla_parse_nested(prop, TIPC_NLA_PROP_MAX, link[TIPC_NLA_LINK_PROP], + NULL); + + nla_parse_nested(stats, TIPC_NLA_STATS_MAX, link[TIPC_NLA_LINK_STATS], + NULL); + + name = (char *)TLV_DATA(msg->req); + if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0) + return 0; + + tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n", + nla_data(link[TIPC_NLA_LINK_NAME])); + + if (link[TIPC_NLA_LINK_BROADCAST]) { + __fill_bc_link_stat(msg, prop, stats); + return 0; + } + + if (link[TIPC_NLA_LINK_ACTIVE]) + tipc_tlv_sprintf(msg->rep, " ACTIVE"); + else if (link[TIPC_NLA_LINK_UP]) + tipc_tlv_sprintf(msg->rep, " STANDBY"); + else + tipc_tlv_sprintf(msg->rep, " DEFUNCT"); + + tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u", + nla_get_u32(link[TIPC_NLA_LINK_MTU]), + nla_get_u32(prop[TIPC_NLA_PROP_PRIO])); + + tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n", + nla_get_u32(prop[TIPC_NLA_PROP_TOL]), + nla_get_u32(prop[TIPC_NLA_PROP_WIN])); + + tipc_tlv_sprintf(msg->rep, + " RX packets:%u fragments:%u/%u bundles:%u/%u\n", + nla_get_u32(link[TIPC_NLA_LINK_RX]) - + nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), + nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), + nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), + nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), + nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); + + tipc_tlv_sprintf(msg->rep, + " TX packets:%u fragments:%u/%u bundles:%u/%u\n", + nla_get_u32(link[TIPC_NLA_LINK_TX]) - + nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), + nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), + nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), + nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), + nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); + + tipc_tlv_sprintf(msg->rep, + " TX profile sample:%u packets average:%u octets\n", + nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]), + nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) / + nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])); + + tipc_tlv_sprintf(msg->rep, + " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ", + perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]), + nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), + perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]), + nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), + perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]), + nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), + perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]), + nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); + + tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n", + perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]), + nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), + perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]), + nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), + perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]), + nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); + + tipc_tlv_sprintf(msg->rep, + " RX states:%u probes:%u naks:%u defs:%u dups:%u\n", + nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]), + nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]), + nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), + nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), + nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); + + tipc_tlv_sprintf(msg->rep, + " TX states:%u probes:%u naks:%u acks:%u dups:%u\n", + nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]), + nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]), + nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), + nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), + nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); + + tipc_tlv_sprintf(msg->rep, + " Congestion link:%u Send queue max:%u avg:%u", + nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), + nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), + nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); + + return 0; +} + static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg) { struct tipc_nl_compat_cmd_dump dump; @@ -380,6 +577,13 @@ static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg) doit.doit = tipc_nl_bearer_disable; doit.transcode = tipc_nl_compat_bearer_disable; return tipc_nl_compat_doit(&doit, msg); + case TIPC_CMD_SHOW_LINK_STATS: + msg->req_type = TIPC_TLV_LINK_NAME; + msg->rep_size = ULTRA_STRING_MAX_LEN; + msg->rep_type = TIPC_TLV_ULTRA_STRING; + dump.dumpit = tipc_nl_link_dump; + dump.format = tipc_nl_compat_link_stat_dump; + return tipc_nl_compat_dumpit(&dump, msg); } return -EOPNOTSUPP; @@ -479,6 +683,7 @@ static int tipc_nl_compat_tmp_wrap(struct sk_buff *skb, struct genl_info *info) case TIPC_CMD_GET_BEARER_NAMES: case TIPC_CMD_ENABLE_BEARER: case TIPC_CMD_DISABLE_BEARER: + case TIPC_CMD_SHOW_LINK_STATS: return tipc_nl_compat_recv(skb, info); } -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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