cregit-Linux how code gets into the kernel

Release 4.11 net/tipc/netlink_compat.c

Directory: net/tipc
/*
 * Copyright (c) 2014, Ericsson AB
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the names of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "core.h"
#include "bearer.h"
#include "link.h"
#include "name_table.h"
#include "socket.h"
#include "node.h"
#include "net.h"
#include <net/genetlink.h>
#include <linux/tipc_config.h>

/* The legacy API had an artificial message length limit called
 * ULTRA_STRING_MAX_LEN.
 */

#define ULTRA_STRING_MAX_LEN 32768


#define TIPC_SKB_MAX TLV_SPACE(ULTRA_STRING_MAX_LEN)


#define REPLY_TRUNCATED "<truncated>\n"


struct tipc_nl_compat_msg {
	
u16 cmd;
	
int rep_type;
	
int rep_size;
	
int req_type;
	
struct net *net;
	
struct sk_buff *rep;
	
struct tlv_desc *req;
	
struct sock *dst_sk;
};


struct tipc_nl_compat_cmd_dump {
	
int (*header)(struct tipc_nl_compat_msg *);
	
int (*dumpit)(struct sk_buff *, struct netlink_callback *);
	
int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs);
};


struct tipc_nl_compat_cmd_doit {
	
int (*doit)(struct sk_buff *skb, struct genl_info *info);
	
int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd,
			 struct sk_buff *skb, struct tipc_nl_compat_msg *msg);
};


static int tipc_skb_tailroom(struct sk_buff *skb) { int tailroom; int limit; tailroom = skb_tailroom(skb); limit = TIPC_SKB_MAX - skb->len; if (tailroom < limit) return tailroom; return limit; }

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static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len) { struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb); if (tipc_skb_tailroom(skb) < TLV_SPACE(len)) return -EMSGSIZE; skb_put(skb, TLV_SPACE(len)); tlv->tlv_type = htons(type); tlv->tlv_len = htons(TLV_LENGTH(len)); if (len && data) memcpy(TLV_DATA(tlv), data, len); return 0; }

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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)); }

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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; }

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static struct sk_buff *tipc_tlv_alloc(int size) { int hdr_len; struct sk_buff *buf; size = TLV_SPACE(size); hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); buf = alloc_skb(hdr_len + size, GFP_KERNEL); if (!buf) return NULL; skb_reserve(buf, hdr_len); return buf; }

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static struct sk_buff *tipc_get_err_tlv(char *str) { int str_len = strlen(str) + 1; struct sk_buff *buf; buf = tipc_tlv_alloc(TLV_SPACE(str_len)); if (buf) tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len); return buf; }

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static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, struct tipc_nl_compat_msg *msg, struct sk_buff *arg) { int len = 0; int err; struct sk_buff *buf; struct nlmsghdr *nlmsg; struct netlink_callback cb; memset(&cb, 0, sizeof(cb)); cb.nlh = (struct nlmsghdr *)arg->data; cb.skb = arg; buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!buf) return -ENOMEM; buf->sk = msg->dst_sk; do { int rem; len = (*cmd->dumpit)(buf, &cb); nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) { struct nlattr **attrs; err = tipc_nlmsg_parse(nlmsg, &attrs); if (err) goto err_out; err = (*cmd->format)(msg, attrs); if (err) goto err_out; if (tipc_skb_tailroom(msg->rep) <= 1) { err = -EMSGSIZE; goto err_out; } } skb_reset_tail_pointer(buf); buf->len = 0; } while (len); err = 0; err_out: kfree_skb(buf); if (err == -EMSGSIZE) { /* The legacy API only considered messages filling * "ULTRA_STRING_MAX_LEN" to be truncated. */ if ((TIPC_SKB_MAX - msg->rep->len) <= 1) { char *tail = skb_tail_pointer(msg->rep); if (*tail != '\0') sprintf(tail - sizeof(REPLY_TRUNCATED) - 1, REPLY_TRUNCATED); } return 0; } return err; }

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static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, struct tipc_nl_compat_msg *msg) { 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); if (cmd->header) (*cmd->header)(msg); arg = nlmsg_new(0, GFP_KERNEL); if (!arg) { kfree_skb(msg->rep); return -ENOMEM; } err = __tipc_nl_compat_dumpit(cmd, msg, arg); if (err) kfree_skb(msg->rep); kfree_skb(arg); return err; }

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static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, struct tipc_nl_compat_msg *msg) { int err; struct sk_buff *doit_buf; struct sk_buff *trans_buf; struct nlattr **attrbuf; struct genl_info info; trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); if (!trans_buf) return -ENOMEM; err = (*cmd->transcode)(cmd, trans_buf, msg); if (err) goto trans_out; attrbuf = kmalloc((tipc_genl_family.maxattr + 1) * sizeof(struct nlattr *), GFP_KERNEL); if (!attrbuf) { err = -ENOMEM; goto trans_out; } err = nla_parse(attrbuf, tipc_genl_family.maxattr, (const struct nlattr *)trans_buf->data, trans_buf->len, NULL); if (err) goto parse_out; doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); if (!doit_buf) { err = -ENOMEM; goto parse_out; } doit_buf->sk = msg->dst_sk; memset(&info, 0, sizeof(info)); info.attrs = attrbuf; err = (*cmd->doit)(doit_buf, &info); kfree_skb(doit_buf); parse_out: kfree(attrbuf); trans_out: kfree_skb(trans_buf); return err; }

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static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, struct tipc_nl_compat_msg *msg) { int err; if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type)) return -EINVAL; err = __tipc_nl_compat_doit(cmd, msg); if (err) return err; /* The legacy API considered an empty message a success message */ msg->rep = tipc_tlv_alloc(0); if (!msg->rep) return -ENOMEM; return 0; }

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static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg, struct nlattr **attrs) { struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1]; int err; if (!attrs[TIPC_NLA_BEARER]) return -EINVAL; err = nla_parse_nested(bearer, TIPC_NLA_BEARER_MAX, attrs[TIPC_NLA_BEARER], NULL); if (err) return err; return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME, nla_data(bearer[TIPC_NLA_BEARER_NAME]), nla_len(bearer[TIPC_NLA_BEARER_NAME])); }

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static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd, struct sk_buff *skb, struct tipc_nl_compat_msg *msg) { struct nlattr *prop; struct nlattr *bearer; struct tipc_bearer_config *b; b = (struct tipc_bearer_config *)TLV_DATA(msg->req); bearer = nla_nest_start(skb, TIPC_NLA_BEARER); if (!bearer) return -EMSGSIZE; if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name)) return -EMSGSIZE; if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain))) return -EMSGSIZE; if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) { prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP); if (!prop) return -EMSGSIZE; if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority))) return -EMSGSIZE; nla_nest_end(skb, prop); } nla_nest_end(skb, bearer); return 0; }

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static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd, struct sk_buff *skb, struct tipc_nl_compat_msg *msg) { char *name; struct nlattr *bearer; name = (char *)TLV_DATA(msg->req); bearer = nla_nest_start(skb, TIPC_NLA_BEARER); if (!bearer) return -EMSGSIZE; if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name)) return -EMSGSIZE; nla_nest_end(skb, bearer); return 0; }

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static inline u32 perc(u32 count, u32 total) { return (count * 100 + (total / 2)) / total; }

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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])); }

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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]; int err; if (!attrs[TIPC_NLA_LINK]) return -EINVAL; err = nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL); if (err) return err; if (!link[TIPC_NLA_LINK_PROP]) return -EINVAL; err = nla_parse_nested(prop, TIPC_NLA_PROP_MAX, link[TIPC_NLA_LINK_PROP], NULL); if (err) return err; if (!link[TIPC_NLA_LINK_STATS]) return -EINVAL; err = nla_parse_nested(stats, TIPC_NLA_STATS_MAX, link[TIPC_NLA_LINK_STATS], NULL); if (err) return err; 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; }

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static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg, struct nlattr **attrs) { struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; struct tipc_link_info link_info; int err; if (!attrs[TIPC_NLA_LINK]) return -EINVAL; err = nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL); if (err) return err; link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]); link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP])); nla_strlcpy(link_info.str, link[TIPC_NLA_LINK_NAME], TIPC_MAX_LINK_NAME); return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO, &link_info, sizeof(link_info)); }

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static int __tipc_add_link_prop(struct sk_buff *skb, struct tipc_nl_compat_msg *msg, struct tipc_link_config *lc) { switch (msg->cmd) { case TIPC_CMD_SET_LINK_PRI: return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value)); case TIPC_CMD_SET_LINK_TOL: return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value)); case TIPC_CMD_SET_LINK_WINDOW: return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value)); } return -EINVAL; }

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static int tipc_nl_compat_media_set(struct sk_buff *skb, struct tipc_nl_compat_msg *msg) { struct nlattr *prop; struct nlattr *media; struct tipc_link_config *lc; lc = (struct tipc_link_config *)TLV_DATA(msg->req); media = nla_nest_start(skb, TIPC_NLA_MEDIA); if (!media) return -EMSGSIZE; if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name)) return -EMSGSIZE; prop = nla_nest_start(skb, TIPC_NLA_MEDIA_PROP); if (!prop) return -EMSGSIZE; __tipc_add_link_prop(skb, msg, lc); nla_nest_end(skb, prop); nla_nest_end(skb, media); return 0; }

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static int tipc_nl_compat_bearer_set(struct sk_buff *skb, struct tipc_nl_compat_msg *msg) { struct nlattr *prop; struct nlattr *bearer; struct tipc_link_config *lc; lc = (struct tipc_link_config *)TLV_DATA(msg->req); bearer = nla_nest_start(skb, TIPC_NLA_BEARER); if (!bearer) return -EMSGSIZE; if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name)) return -EMSGSIZE; prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP); if (!prop) return -EMSGSIZE; __tipc_add_link_prop(skb, msg, lc); nla_nest_end(skb, prop); nla_nest_end(skb, bearer); return 0; }

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static int __tipc_nl_compat_link_set(struct sk_buff *skb, struct tipc_nl_compat_msg *msg) { struct nlattr *prop; struct nlattr *link; struct tipc_link_config *lc; lc = (struct tipc_link_config *)TLV_DATA(msg->req); link = nla_nest_start(skb, TIPC_NLA_LINK); if (!link) return -EMSGSIZE; if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name)) return -EMSGSIZE; prop = nla_nest_start(skb, TIPC_NLA_LINK_PROP); if (!prop) return -EMSGSIZE; __tipc_add_link_prop(skb, msg, lc); nla_nest_end(skb, prop); nla_nest_end(skb, link); return 0; }

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Richard Alpe124100.00%1100.00%
Total124100.00%1100.00%


static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd, struct sk_buff *skb, struct tipc_nl_compat_msg *msg) { struct tipc_link_config *lc; struct tipc_bearer *bearer; struct tipc_media *media; lc = (struct tipc_link_config *)TLV_DATA(msg->req); media = tipc_media_find(lc->name); if (media) { cmd->doit = &tipc_nl_media_set; return tipc_nl_compat_media_set(skb, msg); } bearer = tipc_bearer_find(msg->net, lc->name); if (bearer) { cmd->doit = &tipc_nl_bearer_set; return tipc_nl_compat_bearer_set(skb, msg); } return __tipc_nl_compat_link_set(skb, msg); }

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Richard Alpe122100.00%1100.00%
Total122100.00%1100.00%


static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd, struct sk_buff *skb, struct tipc_nl_compat_msg *msg) { char *name; struct nlattr *link; name = (char *)TLV_DATA(msg->req); link = nla_nest_start(skb, TIPC_NLA_LINK); if (!link) return -EMSGSIZE; if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name)) return -EMSGSIZE; nla_nest_end(skb, link); return 0; }

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Richard Alpe86100.00%2100.00%
Total86100.00%2100.00%


static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg) { int i; u32 depth; struct tipc_name_table_query *ntq; static const char * const header[] = { "Type ", "Lower Upper ", "Port Identity ", "Publication Scope" }; ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); depth = ntohl(ntq->depth); if (depth > 4) depth = 4; for (i = 0; i < depth; i++) tipc_tlv_sprintf(msg->rep, header[i]); tipc_tlv_sprintf(msg->rep, "\n"); return 0; }

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Richard Alpe110100.00%1100.00%
Total110100.00%1100.00%


static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg, struct nlattr **attrs) { char port_str[27]; struct tipc_name_table_query *ntq; struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1]; struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; u32 node, depth, type, lowbound, upbound; static const char * const scope_str[] = {"", " zone", " cluster", " node"}; int err; if (!attrs[TIPC_NLA_NAME_TABLE]) return -EINVAL; err = nla_parse_nested(nt, TIPC_NLA_NAME_TABLE_MAX, attrs[TIPC_NLA_NAME_TABLE], NULL); if (err) return err; if (!nt[TIPC_NLA_NAME_TABLE_PUBL]) return -EINVAL; err = nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, nt[TIPC_NLA_NAME_TABLE_PUBL], NULL); if (err) return err; ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req); depth = ntohl(ntq->depth); type = ntohl(ntq->type); lowbound = ntohl(ntq->lowbound); upbound = ntohl(ntq->upbound); if (!(depth & TIPC_NTQ_ALLTYPES) && (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]))) return 0; if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]))) return 0; if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]))) return 0; tipc_tlv_sprintf(msg->rep, "%-10u ", nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])); if (depth == 1) goto out; tipc_tlv_sprintf(msg->rep, "%-10u %-10u ", nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]), nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])); if (depth == 2) goto out; node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]); sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node), tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF])); tipc_tlv_sprintf(msg->rep, "%-26s ", port_str); if (depth == 3) goto out; tipc_tlv_sprintf(msg->rep, "%-10u %s", nla_get_u32(publ[TIPC_NLA_PUBL_KEY]), scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]); out: tipc_tlv_sprintf(msg->rep, "\n"); return 0; }

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Richard Alpe37989.39%266.67%
Baozeng Ding4510.61%133.33%
Total424100.00%3100.00%


static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, struct nlattr **attrs) { u32 type, lower, upper; struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1]; int err; if (!attrs[TIPC_NLA_PUBL]) return -EINVAL; err = nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, attrs[TIPC_NLA_PUBL], NULL); if (err) return err; type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]); lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]); upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]); if (lower == upper) tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower); else tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper); return 0; }

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Richard Alpe11682.86%150.00%
Baozeng Ding2417.14%150.00%
Total140100.00%2100.00%


static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock) { int err; void *hdr; struct nlattr *nest; struct sk_buff *args; struct tipc_nl_compat_cmd_dump dump; args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); if (!args) return -ENOMEM; hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI, TIPC_NL_PUBL_GET); nest = nla_nest_start(args, TIPC_NLA_SOCK); if (!nest) { kfree_skb(args); return -EMSGSIZE; } if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) { kfree_skb(args); return -EMSGSIZE; } nla_nest_end(args, nest); genlmsg_end(args, hdr); dump.dumpit = tipc_nl_publ_dump; dump.format = __tipc_nl_compat_publ_dump; err = __tipc_nl_compat_dumpit(&dump, msg, args); kfree_skb(args); return err; }

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Richard Alpe164100.00%1100.00%
Total164100.00%1100.00%


static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg, struct nlattr **attrs) { int err; u32 sock_ref; struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1]; if (!attrs[TIPC_NLA_SOCK]) return -EINVAL; err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, attrs[TIPC_NLA_SOCK], NULL); if (err) return err; sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]); tipc_tlv_sprintf(msg->rep, "%u:", sock_ref); if (sock[TIPC_NLA_SOCK_CON]) { u32 node; struct nlattr *con[TIPC_NLA_CON_MAX + 1]; nla_parse_nested(con, TIPC_NLA_CON_MAX, sock[TIPC_NLA_SOCK_CON], NULL); node = nla_get_u32(con[TIPC_NLA_CON_NODE]); tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node), tipc_node(node), nla_get_u32(con[TIPC_NLA_CON_SOCK])); if (con[TIPC_NLA_CON_FLAG]) tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n", nla_get_u32(con[TIPC_NLA_CON_TYPE]), nla_get_u32(con[TIPC_NLA_CON_INST])); else tipc_tlv_sprintf(msg->rep, "\n"); } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) { tipc_tlv_sprintf(msg->rep, " bound to"); err = tipc_nl_compat_publ_dump(msg, sock_ref); if (err) return err; } tipc_tlv_sprintf(msg->rep, "\n"); return 0; }

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Richard Alpe23591.80%150.00%
Baozeng Ding218.20%150.00%
Total256100.00%2100.00%


static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg, struct nlattr **attrs) { struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1]; int err; if (!attrs[TIPC_NLA_MEDIA]) return -EINVAL; err = nla_parse_nested(media, TIPC_NLA_MEDIA_MAX, attrs[TIPC_NLA_MEDIA], NULL); if (err) return err; return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME, nla_data(media[TIPC_NLA_MEDIA_NAME]), nla_len(media[TIPC_NLA_MEDIA_NAME])); }

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Richard Alpe6773.63%150.00%
Baozeng Ding2426.37%150.00%
Total91100.00%2100.00%


static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg, struct nlattr **attrs) { struct tipc_node_info node_info; struct nlattr *node[TIPC_NLA_NODE_MAX + 1]; int err; if (!attrs[TIPC_NLA_NODE]) return -EINVAL; err = nla_parse_nested(node, TIPC_NLA_NODE_MAX, attrs[TIPC_NLA_NODE], NULL); if (err) return err; node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR])); node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP])); return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info, sizeof(node_info)); }

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Richard Alpe9379.49%150.00%
Baozeng Ding2420.51%150.00%
Total117100.00%2100.00%


static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd, struct sk_buff *skb, struct tipc_nl_compat_msg *msg) { u32 val; struct nlattr *net; val = ntohl(*(__be32 *)TLV_DATA(msg->req)); net = nla_nest_start(skb, TIPC_NLA_NET); if (!net) return -EMSGSIZE; if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) { if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val)) return -EMSGSIZE; } else if (msg->cmd == TIPC_CMD_SET_NETID) { if (nla_put_u32(skb, TIPC_NLA_NET_ID, val)) return -EMSGSIZE; } nla_nest_end(skb, net); return 0; }

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Richard Alpe125100.00%3100.00%
Total125100.00%3100.00%


static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg, struct nlattr **attrs) { __be32 id; struct nlattr *net[TIPC_NLA_NET_MAX + 1]; int err; if (!attrs[TIPC_NLA_NET]) return -EINVAL; err = nla_parse_nested(net, TIPC_NLA_NET_MAX, attrs[TIPC_NLA_NET], NULL); if (err) return err; id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID])); return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id)); }

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Richard Alpe7575.76%150.00%
Baozeng Ding2424.24%150.00%
Total99100.00%2100.00%


static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg) { msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN); if (!msg->rep) return -ENOMEM; tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING); tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n"); return 0; }

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Richard Alpe54100.00%1100.00%
Total54100.00%1100.00%


static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg) { struct tipc_nl_compat_cmd_dump dump; struct tipc_nl_compat_cmd_doit doit; memset(&dump, 0, sizeof(dump)); memset(&doit, 0, sizeof(doit)); switch (msg->cmd) { case TIPC_CMD_NOOP: msg->rep = tipc_tlv_alloc(0); if (!msg->rep) return -ENOMEM; return 0; case TIPC_CMD_GET_BEARER_NAMES: msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME); dump.dumpit = tipc_nl_bearer_dump; dump.format = tipc_nl_compat_bearer_dump; return tipc_nl_compat_dumpit(&dump, msg); case TIPC_CMD_ENABLE_BEARER: msg->req_type = TIPC_TLV_BEARER_CONFIG; doit.doit = tipc_nl_bearer_enable; doit.transcode = tipc_nl_compat_bearer_enable; return tipc_nl_compat_doit(&doit, msg); case TIPC_CMD_DISABLE_BEARER: msg->req_type = TIPC_TLV_BEARER_NAME; 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_node_dump_link; dump.format = tipc_nl_compat_link_stat_dump; return tipc_nl_compat_dumpit(&dump, msg); case TIPC_CMD_GET_LINKS: msg->req_type = TIPC_TLV_NET_ADDR; msg->rep_size = ULTRA_STRING_MAX_LEN; dump.dumpit = tipc_nl_node_dump_link; dump.format = tipc_nl_compat_link_dump; return tipc_nl_compat_dumpit(&dump, msg); case TIPC_CMD_SET_LINK_TOL: case TIPC_CMD_SET_LINK_PRI: case TIPC_CMD_SET_LINK_WINDOW: msg->req_type = TIPC_TLV_LINK_CONFIG; doit.doit = tipc_nl_node_set_link; doit.transcode = tipc_nl_compat_link_set; return tipc_nl_compat_doit(&doit, msg); case TIPC_CMD_RESET_LINK_STATS: msg->req_type = TIPC_TLV_LINK_NAME; doit.doit = tipc_nl_node_reset_link_stats; doit.transcode = tipc_nl_compat_link_reset_stats; return tipc_nl_compat_doit(&doit, msg); case TIPC_CMD_SHOW_NAME_TABLE: msg->req_type = TIPC_TLV_NAME_TBL_QUERY; msg->rep_size = ULTRA_STRING_MAX_LEN; msg->rep_type = TIPC_TLV_ULTRA_STRING; dump.header = tipc_nl_compat_name_table_dump_header; dump.dumpit = tipc_nl_name_table_dump; dump.format = tipc_nl_compat_name_table_dump; return tipc_nl_compat_dumpit(&dump, msg); case TIPC_CMD_SHOW_PORTS: msg->rep_size = ULTRA_STRING_MAX_LEN; msg->rep_type = TIPC_TLV_ULTRA_STRING; dump.dumpit = tipc_nl_sk_dump; dump.format = tipc_nl_compat_sk_dump; return tipc_nl_compat_dumpit(&dump, msg); case TIPC_CMD_GET_MEDIA_NAMES: msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME); dump.dumpit = tipc_nl_media_dump; dump.format = tipc_nl_compat_media_dump; return tipc_nl_compat_dumpit(&dump, msg); case TIPC_CMD_GET_NODES: msg->rep_size = ULTRA_STRING_MAX_LEN; dump.dumpit = tipc_nl_node_dump; dump.format = tipc_nl_compat_node_dump; return tipc_nl_compat_dumpit(&dump, msg); case TIPC_CMD_SET_NODE_ADDR: msg->req_type = TIPC_TLV_NET_ADDR; doit.doit = tipc_nl_net_set; doit.transcode = tipc_nl_compat_net_set; return tipc_nl_compat_doit(&doit, msg); case TIPC_CMD_SET_NETID: msg->req_type = TIPC_TLV_UNSIGNED; doit.doit = tipc_nl_net_set; doit.transcode = tipc_nl_compat_net_set; return tipc_nl_compat_doit(&doit, msg); case TIPC_CMD_GET_NETID: msg->rep_size = sizeof(u32); dump.dumpit = tipc_nl_net_dump; dump.format = tipc_nl_compat_net_dump; return tipc_nl_compat_dumpit(&dump, msg); case TIPC_CMD_SHOW_STATS: return tipc_cmd_show_stats_compat(msg); } return -EOPNOTSUPP; }

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Richard Alpe56999.30%1588.24%
Jon Paul Maloy40.70%211.76%
Total573100.00%17100.00%


static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info) { int err; int len; struct tipc_nl_compat_msg msg; struct nlmsghdr *req_nlh; struct nlmsghdr *rep_nlh; struct tipc_genlmsghdr *req_userhdr = info->userhdr; memset(&msg, 0, sizeof(msg)); req_nlh = (struct nlmsghdr *)skb->data; msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN; msg.cmd = req_userhdr->cmd; msg.net = genl_info_net(info); msg.dst_sk = skb->sk; if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) { msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN); err = -EACCES; goto send; } len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN); if (len && !TLV_OK(msg.req, len)) { msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); err = -EOPNOTSUPP; goto send; } err = tipc_nl_compat_handle(&msg); if ((err == -EOPNOTSUPP) || (err == -EPERM)) msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); else if (err == -EINVAL) msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR); send: if (!msg.rep) return err; len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); skb_push(msg.rep, len); rep_nlh = nlmsg_hdr(msg.rep); memcpy(rep_nlh, info->nlhdr, len); rep_nlh->nlmsg_len = msg.rep->len; genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid); return err; }

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Richard Alpe31397.51%480.00%
Florian Westphal82.49%120.00%
Total321100.00%5100.00%

static struct genl_ops tipc_genl_compat_ops[] = { { .cmd = TIPC_GENL_CMD, .doit = tipc_nl_compat_recv, }, }; static struct genl_family tipc_genl_compat_family __ro_after_init = { .name = TIPC_GENL_NAME, .version = TIPC_GENL_VERSION, .hdrsize = TIPC_GENL_HDRLEN, .maxattr = 0, .netnsok = true, .module = THIS_MODULE, .ops = tipc_genl_compat_ops, .n_ops = ARRAY_SIZE(tipc_genl_compat_ops), };
int __init tipc_netlink_compat_start(void) { int res; res = genl_register_family(&tipc_genl_compat_family); if (res) { pr_err("Failed to register legacy compat interface\n"); return res; } return 0; }

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Richard Alpe3494.44%133.33%
Johannes Berg25.56%266.67%
Total36100.00%3100.00%


void tipc_netlink_compat_stop(void) { genl_unregister_family(&tipc_genl_compat_family); }

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Richard Alpe13100.00%1100.00%
Total13100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Richard Alpe580894.67%2074.07%
Baozeng Ding2764.50%13.70%
Johannes Berg360.59%27.41%
Florian Westphal80.13%13.70%
Jon Paul Maloy40.07%27.41%
Kangjie Lu30.05%13.70%
Total6135100.00%27100.00%
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