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Code Issues Releases Wiki Activity
linux-stable/net/tipc/netlink_compat.c
Ying Xue 2753ca5d90 tipc: fix uninit-value in tipc_nl_compat_doit 
BUG: KMSAN: uninit-value in tipc_nl_compat_doit+0x404/0xa10 net/tipc/netlink_compat.c:335
CPU: 0 PID: 4514 Comm: syz-executor485 Not tainted 4.16.0+ #87
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:683
 tipc_nl_compat_doit+0x404/0xa10 net/tipc/netlink_compat.c:335
 tipc_nl_compat_recv+0x164b/0x2700 net/tipc/netlink_compat.c:1153
 genl_family_rcv_msg net/netlink/genetlink.c:599 [inline]
 genl_rcv_msg+0x1686/0x1810 net/netlink/genetlink.c:624
 netlink_rcv_skb+0x378/0x600 net/netlink/af_netlink.c:2447
 genl_rcv+0x63/0x80 net/netlink/genetlink.c:635
 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
 netlink_unicast+0x166b/0x1740 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x1048/0x1310 net/netlink/af_netlink.c:1900
 sock_sendmsg_nosec net/socket.c:630 [inline]
 sock_sendmsg net/socket.c:640 [inline]
 ___sys_sendmsg+0xec0/0x1310 net/socket.c:2046
 __sys_sendmsg net/socket.c:2080 [inline]
 SYSC_sendmsg+0x2a3/0x3d0 net/socket.c:2091
 SyS_sendmsg+0x54/0x80 net/socket.c:2087
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x43fda9
RSP: 002b:00007ffd0c184ba8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fda9
RDX: 0000000000000000 RSI: 0000000020023000 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000004002c8 R11: 0000000000000213 R12: 00000000004016d0
R13: 0000000000401760 R14: 0000000000000000 R15: 0000000000000000

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline]
 kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:188
 kmsan_kmalloc+0x94/0x100 mm/kmsan/kmsan.c:314
 kmsan_slab_alloc+0x11/0x20 mm/kmsan/kmsan.c:321
 slab_post_alloc_hook mm/slab.h:445 [inline]
 slab_alloc_node mm/slub.c:2737 [inline]
 __kmalloc_node_track_caller+0xaed/0x11c0 mm/slub.c:4369
 __kmalloc_reserve net/core/skbuff.c:138 [inline]
 __alloc_skb+0x2cf/0x9f0 net/core/skbuff.c:206
 alloc_skb include/linux/skbuff.h:984 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1183 [inline]
 netlink_sendmsg+0x9a6/0x1310 net/netlink/af_netlink.c:1875
 sock_sendmsg_nosec net/socket.c:630 [inline]
 sock_sendmsg net/socket.c:640 [inline]
 ___sys_sendmsg+0xec0/0x1310 net/socket.c:2046
 __sys_sendmsg net/socket.c:2080 [inline]
 SYSC_sendmsg+0x2a3/0x3d0 net/socket.c:2091
 SyS_sendmsg+0x54/0x80 net/socket.c:2087
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2

In tipc_nl_compat_recv(), when the len variable returned by
nlmsg_attrlen() is 0, the message is still treated as a valid one,
which is obviously unresonable. When len is zero, it means the
message not only doesn't contain any valid TLV payload, but also
TLV header is not included. Under this stituation, tlv_type field
in TLV header is still accessed in tipc_nl_compat_dumpit() or
tipc_nl_compat_doit(), but the field space is obviously illegal.
Of course, it is not initialized.

Reported-by: syzbot+bca0dc46634781f08b38@syzkaller.appspotmail.com
Reported-by: syzbot+6bdb590321a7ae40c1a6@syzkaller.appspotmail.com
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-01-15 20:29:21 -08:00

1318 lines
33 KiB
C
Raw Blame History

/*
* 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;
}
static inline int TLV_GET_DATA_LEN(struct tlv_desc *tlv)
{
return TLV_GET_LEN(tlv) - TLV_SPACE(0);
}
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;
}
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;
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;
}
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;
}
static inline bool string_is_valid(char *s, int len)
{
return memchr(s, '\0', len) ? true : false;
}
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;
if (__tipc_dump_start(&cb, msg->net)) {
kfree_skb(buf);
return -ENOMEM;
}
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:
tipc_dump_done(&cb);
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;
}
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);
msg->rep = NULL;
return -ENOMEM;
}
err = __tipc_nl_compat_dumpit(cmd, msg, arg);
if (err) {
kfree_skb(msg->rep);
msg->rep = NULL;
}
kfree_skb(arg);
return err;
}
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;
attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1,
sizeof(struct nlattr *),
GFP_KERNEL);
if (!attrbuf) {
err = -ENOMEM;
goto trans_out;
}
doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (!doit_buf) {
err = -ENOMEM;
goto attrbuf_out;
}
memset(&info, 0, sizeof(info));
info.attrs = attrbuf;
rtnl_lock();
err = (*cmd->transcode)(cmd, trans_buf, msg);
if (err)
goto doit_out;
err = nla_parse(attrbuf, tipc_genl_family.maxattr,
(const struct nlattr *)trans_buf->data,
trans_buf->len, NULL, NULL);
if (err)
goto doit_out;
doit_buf->sk = msg->dst_sk;
err = (*cmd->doit)(doit_buf, &info);
doit_out:
rtnl_unlock();
kfree_skb(doit_buf);
attrbuf_out:
kfree(attrbuf);
trans_out:
kfree_skb(trans_buf);
return err;
}
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;
}
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, 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]));
}
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;
int len;
b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
if (!bearer)
return -EMSGSIZE;
len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_BEARER_NAME);
if (!string_is_valid(b->name, len))
return -EINVAL;
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;
}
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;
int len;
name = (char *)TLV_DATA(msg->req);
bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
if (!bearer)
return -EMSGSIZE;
len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_BEARER_NAME);
if (!string_is_valid(name, len))
return -EINVAL;
if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
return -EMSGSIZE;
nla_nest_end(skb, bearer);
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];
int err;
int len;
if (!attrs[TIPC_NLA_LINK])
return -EINVAL;
err = nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK],
NULL, 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, 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, NULL);
if (err)
return err;
name = (char *)TLV_DATA(msg->req);
len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_LINK_NAME);
if (!string_is_valid(name, len))
return -EINVAL;
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_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, 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));
}
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;
}
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;
int len;
lc = (struct tipc_link_config *)TLV_DATA(msg->req);
media = nla_nest_start(skb, TIPC_NLA_MEDIA);
if (!media)
return -EMSGSIZE;
len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_MEDIA_NAME);
if (!string_is_valid(lc->name, len))
return -EINVAL;
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;
}
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;
int len;
lc = (struct tipc_link_config *)TLV_DATA(msg->req);
bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
if (!bearer)
return -EMSGSIZE;
len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_MEDIA_NAME);
if (!string_is_valid(lc->name, len))
return -EINVAL;
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;
}
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;
}
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;
int len;
lc = (struct tipc_link_config *)TLV_DATA(msg->req);
len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_LINK_NAME);
if (!string_is_valid(lc->name, len))
return -EINVAL;
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);
}
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;
int len;
name = (char *)TLV_DATA(msg->req);
link = nla_nest_start(skb, TIPC_NLA_LINK);
if (!link)
return -EMSGSIZE;
len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_LINK_NAME);
if (!string_is_valid(name, len))
return -EINVAL;
if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
return -EMSGSIZE;
nla_nest_end(skb, link);
return 0;
}
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);
if (TLV_GET_DATA_LEN(msg->req) < sizeof(struct tipc_name_table_query))
return -EINVAL;
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;
}
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, 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, 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;
}
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, 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;
}
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);
if (!hdr) {
kfree_skb(args);
return -EMSGSIZE;
}
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;
}
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, 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];
err = nla_parse_nested(con, TIPC_NLA_CON_MAX,
sock[TIPC_NLA_SOCK_CON], NULL, NULL);
if (err)
return err;
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;
}
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, 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]));
}
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, 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));
}
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;
}
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, 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));
}
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;
}
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;
}
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;
}
static const 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;
}
void tipc_netlink_compat_stop(void)
{
genl_unregister_family(&tipc_genl_compat_family);
}
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