IPVS: Add genetlink interface implementation

Add the implementation of the new Generic Netlink interface to IPVS and
keep the old set/getsockopt interface for userspace backwards
compatibility.

Signed-off-by: Julius Volz <juliusv@google.com>
Acked-by: Sven Wegener <sven.wegener@stealer.net>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Julius Volz 2008-08-14 14:08:44 +02:00 committed by Simon Horman
parent c1bc667e84
commit 9a812198ae

View File

@ -37,6 +37,7 @@
#include <net/ip.h>
#include <net/route.h>
#include <net/sock.h>
#include <net/genetlink.h>
#include <asm/uaccess.h>
@ -2320,6 +2321,872 @@ static struct nf_sockopt_ops ip_vs_sockopts = {
.owner = THIS_MODULE,
};
/*
* Generic Netlink interface
*/
/* IPVS genetlink family */
static struct genl_family ip_vs_genl_family = {
.id = GENL_ID_GENERATE,
.hdrsize = 0,
.name = IPVS_GENL_NAME,
.version = IPVS_GENL_VERSION,
.maxattr = IPVS_CMD_MAX,
};
/* Policy used for first-level command attributes */
static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
[IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
[IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
[IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
[IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
[IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
};
/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
[IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
[IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
.len = IP_VS_IFNAME_MAXLEN },
[IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
};
/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
[IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
[IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
[IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
.len = sizeof(union nf_inet_addr) },
[IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
[IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
[IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
.len = IP_VS_SCHEDNAME_MAXLEN },
[IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
.len = sizeof(struct ip_vs_flags) },
[IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
[IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
[IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
};
/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
[IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
.len = sizeof(union nf_inet_addr) },
[IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
[IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
[IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
[IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
[IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
[IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
[IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
[IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
[IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
};
static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
struct ip_vs_stats *stats)
{
struct nlattr *nl_stats = nla_nest_start(skb, container_type);
if (!nl_stats)
return -EMSGSIZE;
spin_lock_bh(&stats->lock);
NLA_PUT_U32(skb, IPVS_STATS_ATTR_CONNS, stats->conns);
NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPKTS, stats->inpkts);
NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPKTS, stats->outpkts);
NLA_PUT_U64(skb, IPVS_STATS_ATTR_INBYTES, stats->inbytes);
NLA_PUT_U64(skb, IPVS_STATS_ATTR_OUTBYTES, stats->outbytes);
NLA_PUT_U32(skb, IPVS_STATS_ATTR_CPS, stats->cps);
NLA_PUT_U32(skb, IPVS_STATS_ATTR_INPPS, stats->inpps);
NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTPPS, stats->outpps);
NLA_PUT_U32(skb, IPVS_STATS_ATTR_INBPS, stats->inbps);
NLA_PUT_U32(skb, IPVS_STATS_ATTR_OUTBPS, stats->outbps);
spin_unlock_bh(&stats->lock);
nla_nest_end(skb, nl_stats);
return 0;
nla_put_failure:
spin_unlock_bh(&stats->lock);
nla_nest_cancel(skb, nl_stats);
return -EMSGSIZE;
}
static int ip_vs_genl_fill_service(struct sk_buff *skb,
struct ip_vs_service *svc)
{
struct nlattr *nl_service;
struct ip_vs_flags flags = { .flags = svc->flags,
.mask = ~0 };
nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
if (!nl_service)
return -EMSGSIZE;
NLA_PUT_U16(skb, IPVS_SVC_ATTR_AF, AF_INET);
if (svc->fwmark) {
NLA_PUT_U32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark);
} else {
NLA_PUT_U16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol);
NLA_PUT(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr);
NLA_PUT_U16(skb, IPVS_SVC_ATTR_PORT, svc->port);
}
NLA_PUT_STRING(skb, IPVS_SVC_ATTR_SCHED_NAME, svc->scheduler->name);
NLA_PUT(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags);
NLA_PUT_U32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ);
NLA_PUT_U32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask);
if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats))
goto nla_put_failure;
nla_nest_end(skb, nl_service);
return 0;
nla_put_failure:
nla_nest_cancel(skb, nl_service);
return -EMSGSIZE;
}
static int ip_vs_genl_dump_service(struct sk_buff *skb,
struct ip_vs_service *svc,
struct netlink_callback *cb)
{
void *hdr;
hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
&ip_vs_genl_family, NLM_F_MULTI,
IPVS_CMD_NEW_SERVICE);
if (!hdr)
return -EMSGSIZE;
if (ip_vs_genl_fill_service(skb, svc) < 0)
goto nla_put_failure;
return genlmsg_end(skb, hdr);
nla_put_failure:
genlmsg_cancel(skb, hdr);
return -EMSGSIZE;
}
static int ip_vs_genl_dump_services(struct sk_buff *skb,
struct netlink_callback *cb)
{
int idx = 0, i;
int start = cb->args[0];
struct ip_vs_service *svc;
mutex_lock(&__ip_vs_mutex);
for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
list_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
if (++idx <= start)
continue;
if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
idx--;
goto nla_put_failure;
}
}
}
for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
list_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
if (++idx <= start)
continue;
if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
idx--;
goto nla_put_failure;
}
}
}
nla_put_failure:
mutex_unlock(&__ip_vs_mutex);
cb->args[0] = idx;
return skb->len;
}
static int ip_vs_genl_parse_service(struct ip_vs_service_user *usvc,
struct nlattr *nla, int full_entry)
{
struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
/* Parse mandatory identifying service fields first */
if (nla == NULL ||
nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
return -EINVAL;
nla_af = attrs[IPVS_SVC_ATTR_AF];
nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
nla_port = attrs[IPVS_SVC_ATTR_PORT];
nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
return -EINVAL;
/* For now, only support IPv4 */
if (nla_get_u16(nla_af) != AF_INET)
return -EAFNOSUPPORT;
if (nla_fwmark) {
usvc->protocol = IPPROTO_TCP;
usvc->fwmark = nla_get_u32(nla_fwmark);
} else {
usvc->protocol = nla_get_u16(nla_protocol);
nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
usvc->port = nla_get_u16(nla_port);
usvc->fwmark = 0;
}
/* If a full entry was requested, check for the additional fields */
if (full_entry) {
struct nlattr *nla_sched, *nla_flags, *nla_timeout,
*nla_netmask;
struct ip_vs_flags flags;
struct ip_vs_service *svc;
nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
return -EINVAL;
nla_memcpy(&flags, nla_flags, sizeof(flags));
/* prefill flags from service if it already exists */
if (usvc->fwmark)
svc = __ip_vs_svc_fwm_get(usvc->fwmark);
else
svc = __ip_vs_service_get(usvc->protocol, usvc->addr,
usvc->port);
if (svc) {
usvc->flags = svc->flags;
ip_vs_service_put(svc);
} else
usvc->flags = 0;
/* set new flags from userland */
usvc->flags = (usvc->flags & ~flags.mask) |
(flags.flags & flags.mask);
strlcpy(usvc->sched_name, nla_data(nla_sched),
sizeof(usvc->sched_name));
usvc->timeout = nla_get_u32(nla_timeout);
usvc->netmask = nla_get_u32(nla_netmask);
}
return 0;
}
static struct ip_vs_service *ip_vs_genl_find_service(struct nlattr *nla)
{
struct ip_vs_service_user usvc;
int ret;
ret = ip_vs_genl_parse_service(&usvc, nla, 0);
if (ret)
return ERR_PTR(ret);
if (usvc.fwmark)
return __ip_vs_svc_fwm_get(usvc.fwmark);
else
return __ip_vs_service_get(usvc.protocol, usvc.addr,
usvc.port);
}
static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
{
struct nlattr *nl_dest;
nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
if (!nl_dest)
return -EMSGSIZE;
NLA_PUT(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr);
NLA_PUT_U16(skb, IPVS_DEST_ATTR_PORT, dest->port);
NLA_PUT_U32(skb, IPVS_DEST_ATTR_FWD_METHOD,
atomic_read(&dest->conn_flags) & IP_VS_CONN_F_FWD_MASK);
NLA_PUT_U32(skb, IPVS_DEST_ATTR_WEIGHT, atomic_read(&dest->weight));
NLA_PUT_U32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold);
NLA_PUT_U32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold);
NLA_PUT_U32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
atomic_read(&dest->activeconns));
NLA_PUT_U32(skb, IPVS_DEST_ATTR_INACT_CONNS,
atomic_read(&dest->inactconns));
NLA_PUT_U32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
atomic_read(&dest->persistconns));
if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats))
goto nla_put_failure;
nla_nest_end(skb, nl_dest);
return 0;
nla_put_failure:
nla_nest_cancel(skb, nl_dest);
return -EMSGSIZE;
}
static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
struct netlink_callback *cb)
{
void *hdr;
hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
&ip_vs_genl_family, NLM_F_MULTI,
IPVS_CMD_NEW_DEST);
if (!hdr)
return -EMSGSIZE;
if (ip_vs_genl_fill_dest(skb, dest) < 0)
goto nla_put_failure;
return genlmsg_end(skb, hdr);
nla_put_failure:
genlmsg_cancel(skb, hdr);
return -EMSGSIZE;
}
static int ip_vs_genl_dump_dests(struct sk_buff *skb,
struct netlink_callback *cb)
{
int idx = 0;
int start = cb->args[0];
struct ip_vs_service *svc;
struct ip_vs_dest *dest;
struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
mutex_lock(&__ip_vs_mutex);
/* Try to find the service for which to dump destinations */
if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
goto out_err;
svc = ip_vs_genl_find_service(attrs[IPVS_CMD_ATTR_SERVICE]);
if (IS_ERR(svc) || svc == NULL)
goto out_err;
/* Dump the destinations */
list_for_each_entry(dest, &svc->destinations, n_list) {
if (++idx <= start)
continue;
if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
idx--;
goto nla_put_failure;
}
}
nla_put_failure:
cb->args[0] = idx;
ip_vs_service_put(svc);
out_err:
mutex_unlock(&__ip_vs_mutex);
return skb->len;
}
static int ip_vs_genl_parse_dest(struct ip_vs_dest_user *udest,
struct nlattr *nla, int full_entry)
{
struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
struct nlattr *nla_addr, *nla_port;
/* Parse mandatory identifying destination fields first */
if (nla == NULL ||
nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
return -EINVAL;
nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
nla_port = attrs[IPVS_DEST_ATTR_PORT];
if (!(nla_addr && nla_port))
return -EINVAL;
nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
udest->port = nla_get_u16(nla_port);
/* If a full entry was requested, check for the additional fields */
if (full_entry) {
struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
*nla_l_thresh;
nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
return -EINVAL;
udest->conn_flags = nla_get_u32(nla_fwd)
& IP_VS_CONN_F_FWD_MASK;
udest->weight = nla_get_u32(nla_weight);
udest->u_threshold = nla_get_u32(nla_u_thresh);
udest->l_threshold = nla_get_u32(nla_l_thresh);
}
return 0;
}
static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __be32 state,
const char *mcast_ifn, __be32 syncid)
{
struct nlattr *nl_daemon;
nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
if (!nl_daemon)
return -EMSGSIZE;
NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_STATE, state);
NLA_PUT_STRING(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn);
NLA_PUT_U32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid);
nla_nest_end(skb, nl_daemon);
return 0;
nla_put_failure:
nla_nest_cancel(skb, nl_daemon);
return -EMSGSIZE;
}
static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __be32 state,
const char *mcast_ifn, __be32 syncid,
struct netlink_callback *cb)
{
void *hdr;
hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
&ip_vs_genl_family, NLM_F_MULTI,
IPVS_CMD_NEW_DAEMON);
if (!hdr)
return -EMSGSIZE;
if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid))
goto nla_put_failure;
return genlmsg_end(skb, hdr);
nla_put_failure:
genlmsg_cancel(skb, hdr);
return -EMSGSIZE;
}
static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
struct netlink_callback *cb)
{
mutex_lock(&__ip_vs_mutex);
if ((ip_vs_sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
ip_vs_master_mcast_ifn,
ip_vs_master_syncid, cb) < 0)
goto nla_put_failure;
cb->args[0] = 1;
}
if ((ip_vs_sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
ip_vs_backup_mcast_ifn,
ip_vs_backup_syncid, cb) < 0)
goto nla_put_failure;
cb->args[1] = 1;
}
nla_put_failure:
mutex_unlock(&__ip_vs_mutex);
return skb->len;
}
static int ip_vs_genl_new_daemon(struct nlattr **attrs)
{
if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
return -EINVAL;
return start_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]));
}
static int ip_vs_genl_del_daemon(struct nlattr **attrs)
{
if (!attrs[IPVS_DAEMON_ATTR_STATE])
return -EINVAL;
return stop_sync_thread(nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
}
static int ip_vs_genl_set_config(struct nlattr **attrs)
{
struct ip_vs_timeout_user t;
__ip_vs_get_timeouts(&t);
if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
t.tcp_fin_timeout =
nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
return ip_vs_set_timeout(&t);
}
static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
{
struct ip_vs_service *svc = NULL;
struct ip_vs_service_user usvc;
struct ip_vs_dest_user udest;
int ret = 0, cmd;
int need_full_svc = 0, need_full_dest = 0;
cmd = info->genlhdr->cmd;
mutex_lock(&__ip_vs_mutex);
if (cmd == IPVS_CMD_FLUSH) {
ret = ip_vs_flush();
goto out;
} else if (cmd == IPVS_CMD_SET_CONFIG) {
ret = ip_vs_genl_set_config(info->attrs);
goto out;
} else if (cmd == IPVS_CMD_NEW_DAEMON ||
cmd == IPVS_CMD_DEL_DAEMON) {
struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
info->attrs[IPVS_CMD_ATTR_DAEMON],
ip_vs_daemon_policy)) {
ret = -EINVAL;
goto out;
}
if (cmd == IPVS_CMD_NEW_DAEMON)
ret = ip_vs_genl_new_daemon(daemon_attrs);
else
ret = ip_vs_genl_del_daemon(daemon_attrs);
goto out;
} else if (cmd == IPVS_CMD_ZERO &&
!info->attrs[IPVS_CMD_ATTR_SERVICE]) {
ret = ip_vs_zero_all();
goto out;
}
/* All following commands require a service argument, so check if we
* received a valid one. We need a full service specification when
* adding / editing a service. Only identifying members otherwise. */
if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
need_full_svc = 1;
ret = ip_vs_genl_parse_service(&usvc,
info->attrs[IPVS_CMD_ATTR_SERVICE],
need_full_svc);
if (ret)
goto out;
/* Lookup the exact service by <protocol, addr, port> or fwmark */
if (usvc.fwmark == 0)
svc = __ip_vs_service_get(usvc.protocol, usvc.addr, usvc.port);
else
svc = __ip_vs_svc_fwm_get(usvc.fwmark);
/* Unless we're adding a new service, the service must already exist */
if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
ret = -ESRCH;
goto out;
}
/* Destination commands require a valid destination argument. For
* adding / editing a destination, we need a full destination
* specification. */
if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
cmd == IPVS_CMD_DEL_DEST) {
if (cmd != IPVS_CMD_DEL_DEST)
need_full_dest = 1;
ret = ip_vs_genl_parse_dest(&udest,
info->attrs[IPVS_CMD_ATTR_DEST],
need_full_dest);
if (ret)
goto out;
}
switch (cmd) {
case IPVS_CMD_NEW_SERVICE:
if (svc == NULL)
ret = ip_vs_add_service(&usvc, &svc);
else
ret = -EEXIST;
break;
case IPVS_CMD_SET_SERVICE:
ret = ip_vs_edit_service(svc, &usvc);
break;
case IPVS_CMD_DEL_SERVICE:
ret = ip_vs_del_service(svc);
break;
case IPVS_CMD_NEW_DEST:
ret = ip_vs_add_dest(svc, &udest);
break;
case IPVS_CMD_SET_DEST:
ret = ip_vs_edit_dest(svc, &udest);
break;
case IPVS_CMD_DEL_DEST:
ret = ip_vs_del_dest(svc, &udest);
break;
case IPVS_CMD_ZERO:
ret = ip_vs_zero_service(svc);
break;
default:
ret = -EINVAL;
}
out:
if (svc)
ip_vs_service_put(svc);
mutex_unlock(&__ip_vs_mutex);
return ret;
}
static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
{
struct sk_buff *msg;
void *reply;
int ret, cmd, reply_cmd;
cmd = info->genlhdr->cmd;
if (cmd == IPVS_CMD_GET_SERVICE)
reply_cmd = IPVS_CMD_NEW_SERVICE;
else if (cmd == IPVS_CMD_GET_INFO)
reply_cmd = IPVS_CMD_SET_INFO;
else if (cmd == IPVS_CMD_GET_CONFIG)
reply_cmd = IPVS_CMD_SET_CONFIG;
else {
IP_VS_ERR("unknown Generic Netlink command\n");
return -EINVAL;
}
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
mutex_lock(&__ip_vs_mutex);
reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
if (reply == NULL)
goto nla_put_failure;
switch (cmd) {
case IPVS_CMD_GET_SERVICE:
{
struct ip_vs_service *svc;
svc = ip_vs_genl_find_service(info->attrs[IPVS_CMD_ATTR_SERVICE]);
if (IS_ERR(svc)) {
ret = PTR_ERR(svc);
goto out_err;
} else if (svc) {
ret = ip_vs_genl_fill_service(msg, svc);
ip_vs_service_put(svc);
if (ret)
goto nla_put_failure;
} else {
ret = -ESRCH;
goto out_err;
}
break;
}
case IPVS_CMD_GET_CONFIG:
{
struct ip_vs_timeout_user t;
__ip_vs_get_timeouts(&t);
#ifdef CONFIG_IP_VS_PROTO_TCP
NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP, t.tcp_timeout);
NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
t.tcp_fin_timeout);
#endif
#ifdef CONFIG_IP_VS_PROTO_UDP
NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout);
#endif
break;
}
case IPVS_CMD_GET_INFO:
NLA_PUT_U32(msg, IPVS_INFO_ATTR_VERSION, IP_VS_VERSION_CODE);
NLA_PUT_U32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
IP_VS_CONN_TAB_SIZE);
break;
}
genlmsg_end(msg, reply);
ret = genlmsg_unicast(msg, info->snd_pid);
goto out;
nla_put_failure:
IP_VS_ERR("not enough space in Netlink message\n");
ret = -EMSGSIZE;
out_err:
nlmsg_free(msg);
out:
mutex_unlock(&__ip_vs_mutex);
return ret;
}
static struct genl_ops ip_vs_genl_ops[] __read_mostly = {
{
.cmd = IPVS_CMD_NEW_SERVICE,
.flags = GENL_ADMIN_PERM,
.policy = ip_vs_cmd_policy,
.doit = ip_vs_genl_set_cmd,
},
{
.cmd = IPVS_CMD_SET_SERVICE,
.flags = GENL_ADMIN_PERM,
.policy = ip_vs_cmd_policy,
.doit = ip_vs_genl_set_cmd,
},
{
.cmd = IPVS_CMD_DEL_SERVICE,
.flags = GENL_ADMIN_PERM,
.policy = ip_vs_cmd_policy,
.doit = ip_vs_genl_set_cmd,
},
{
.cmd = IPVS_CMD_GET_SERVICE,
.flags = GENL_ADMIN_PERM,
.doit = ip_vs_genl_get_cmd,
.dumpit = ip_vs_genl_dump_services,
.policy = ip_vs_cmd_policy,
},
{
.cmd = IPVS_CMD_NEW_DEST,
.flags = GENL_ADMIN_PERM,
.policy = ip_vs_cmd_policy,
.doit = ip_vs_genl_set_cmd,
},
{
.cmd = IPVS_CMD_SET_DEST,
.flags = GENL_ADMIN_PERM,
.policy = ip_vs_cmd_policy,
.doit = ip_vs_genl_set_cmd,
},
{
.cmd = IPVS_CMD_DEL_DEST,
.flags = GENL_ADMIN_PERM,
.policy = ip_vs_cmd_policy,
.doit = ip_vs_genl_set_cmd,
},
{
.cmd = IPVS_CMD_GET_DEST,
.flags = GENL_ADMIN_PERM,
.policy = ip_vs_cmd_policy,
.dumpit = ip_vs_genl_dump_dests,
},
{
.cmd = IPVS_CMD_NEW_DAEMON,
.flags = GENL_ADMIN_PERM,
.policy = ip_vs_cmd_policy,
.doit = ip_vs_genl_set_cmd,
},
{
.cmd = IPVS_CMD_DEL_DAEMON,
.flags = GENL_ADMIN_PERM,
.policy = ip_vs_cmd_policy,
.doit = ip_vs_genl_set_cmd,
},
{
.cmd = IPVS_CMD_GET_DAEMON,
.flags = GENL_ADMIN_PERM,
.dumpit = ip_vs_genl_dump_daemons,
},
{
.cmd = IPVS_CMD_SET_CONFIG,
.flags = GENL_ADMIN_PERM,
.policy = ip_vs_cmd_policy,
.doit = ip_vs_genl_set_cmd,
},
{
.cmd = IPVS_CMD_GET_CONFIG,
.flags = GENL_ADMIN_PERM,
.doit = ip_vs_genl_get_cmd,
},
{
.cmd = IPVS_CMD_GET_INFO,
.flags = GENL_ADMIN_PERM,
.doit = ip_vs_genl_get_cmd,
},
{
.cmd = IPVS_CMD_ZERO,
.flags = GENL_ADMIN_PERM,
.policy = ip_vs_cmd_policy,
.doit = ip_vs_genl_set_cmd,
},
{
.cmd = IPVS_CMD_FLUSH,
.flags = GENL_ADMIN_PERM,
.doit = ip_vs_genl_set_cmd,
},
};
static int __init ip_vs_genl_register(void)
{
int ret, i;
ret = genl_register_family(&ip_vs_genl_family);
if (ret)
return ret;
for (i = 0; i < ARRAY_SIZE(ip_vs_genl_ops); i++) {
ret = genl_register_ops(&ip_vs_genl_family, &ip_vs_genl_ops[i]);
if (ret)
goto err_out;
}
return 0;
err_out:
genl_unregister_family(&ip_vs_genl_family);
return ret;
}
static void ip_vs_genl_unregister(void)
{
genl_unregister_family(&ip_vs_genl_family);
}
/* End of Generic Netlink interface definitions */
int __init ip_vs_control_init(void)
{
@ -2334,6 +3201,13 @@ int __init ip_vs_control_init(void)
return ret;
}
ret = ip_vs_genl_register();
if (ret) {
IP_VS_ERR("cannot register Generic Netlink interface.\n");
nf_unregister_sockopt(&ip_vs_sockopts);
return ret;
}
proc_net_fops_create(&init_net, "ip_vs", 0, &ip_vs_info_fops);
proc_net_fops_create(&init_net, "ip_vs_stats",0, &ip_vs_stats_fops);
@ -2368,6 +3242,7 @@ void ip_vs_control_cleanup(void)
unregister_sysctl_table(sysctl_header);
proc_net_remove(&init_net, "ip_vs_stats");
proc_net_remove(&init_net, "ip_vs");
ip_vs_genl_unregister();
nf_unregister_sockopt(&ip_vs_sockopts);
LeaveFunction(2);
}