/
netlink_compat.c
1365 lines (1105 loc) · 34.4 KB
/
netlink_compat.c
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/*
* 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;
int req_size;
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)
{
struct genl_dumpit_info info;
int len = 0;
int err;
struct sk_buff *buf;
struct nlmsghdr *nlmsg;
struct netlink_callback cb;
struct nlattr **attrbuf;
memset(&cb, 0, sizeof(cb));
cb.nlh = (struct nlmsghdr *)arg->data;
cb.skb = arg;
cb.data = &info;
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;
}
attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1,
sizeof(struct nlattr *), GFP_KERNEL);
if (!attrbuf) {
err = -ENOMEM;
goto err_out;
}
info.attrs = attrbuf;
err = nlmsg_parse_deprecated(cb.nlh, GENL_HDRLEN, attrbuf,
tipc_genl_family.maxattr,
tipc_genl_family.policy, NULL);
if (err)
goto err_out;
do {
int rem;
len = (*cmd->dumpit)(buf, &cb);
nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) {
err = nlmsg_parse_deprecated(nlmsg, GENL_HDRLEN,
attrbuf,
tipc_genl_family.maxattr,
tipc_genl_family.policy,
NULL);
if (err)
goto err_out;
err = (*cmd->format)(msg, attrbuf);
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(attrbuf);
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 && (!msg->req_size ||
!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) {
err = (*cmd->header)(msg);
if (err) {
kfree_skb(msg->rep);
msg->rep = NULL;
return err;
}
}
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_deprecated(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 && (!msg->req_size ||
!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_deprecated(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_noflag(skb, TIPC_NLA_BEARER);
if (!bearer)
return -EMSGSIZE;
len = TLV_GET_DATA_LEN(msg->req);
len -= offsetof(struct tipc_bearer_config, name);
if (len <= 0)
return -EINVAL;
len = min_t(int, len, 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_noflag(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_noflag(skb, TIPC_NLA_BEARER);
if (!bearer)
return -EMSGSIZE;
len = TLV_GET_DATA_LEN(msg->req);
if (len <= 0)
return -EINVAL;
len = min_t(int, len, 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_deprecated(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_deprecated(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_deprecated(stats, TIPC_NLA_STATS_MAX,
link[TIPC_NLA_LINK_STATS], NULL,
NULL);
if (err)
return err;
name = (char *)TLV_DATA(msg->req);
len = TLV_GET_DATA_LEN(msg->req);
if (len <= 0)
return -EINVAL;
len = min_t(int, len, 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_deprecated(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;
lc = (struct tipc_link_config *)TLV_DATA(msg->req);
media = nla_nest_start_noflag(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_noflag(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;
lc = (struct tipc_link_config *)TLV_DATA(msg->req);
bearer = nla_nest_start_noflag(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_noflag(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_noflag(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_noflag(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 = TLV_GET_DATA_LEN(msg->req);
len -= offsetof(struct tipc_link_config, name);
if (len <= 0)
return -EINVAL;
len = min_t(int, len, 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_noflag(skb, TIPC_NLA_LINK);
if (!link)
return -EMSGSIZE;
len = TLV_GET_DATA_LEN(msg->req);
if (len <= 0)
return -EINVAL;
len = min_t(int, len, 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_deprecated(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_deprecated(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_deprecated(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) {