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Diffstat (limited to 'net/core/rtnetlink.c')
-rw-r--r--net/core/rtnetlink.c397
1 files changed, 286 insertions, 111 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 75e3ea7bda08..9201e3621351 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -16,6 +16,7 @@
* Vitaly E. Lavrov RTA_OK arithmetics was wrong.
*/
+#include <linux/bitops.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/types.h>
@@ -39,6 +40,7 @@
#include <linux/if_vlan.h>
#include <linux/pci.h>
#include <linux/etherdevice.h>
+#include <linux/bpf.h>
#include <linux/uaccess.h>
@@ -647,7 +649,7 @@ int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int g
NETLINK_CB(skb).dst_group = group;
if (echo)
- atomic_inc(&skb->users);
+ refcount_inc(&skb->users);
netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
if (echo)
err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
@@ -837,8 +839,7 @@ static void copy_rtnl_link_stats(struct rtnl_link_stats *a,
static inline int rtnl_vfinfo_size(const struct net_device *dev,
u32 ext_filter_mask)
{
- if (dev->dev.parent && dev_is_pci(dev->dev.parent) &&
- (ext_filter_mask & RTEXT_FILTER_VF)) {
+ if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) {
int num_vfs = dev_num_vf(dev->dev.parent);
size_t size = nla_total_size(0);
size += num_vfs *
@@ -877,8 +878,6 @@ static size_t rtnl_port_size(const struct net_device *dev,
{
size_t port_size = nla_total_size(4) /* PORT_VF */
+ nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */
- + nla_total_size(sizeof(struct ifla_port_vsi))
- /* PORT_VSI_TYPE */
+ nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */
+ nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */
+ nla_total_size(1) /* PROT_VDP_REQUEST */
@@ -899,15 +898,13 @@ static size_t rtnl_port_size(const struct net_device *dev,
return port_self_size;
}
-static size_t rtnl_xdp_size(const struct net_device *dev)
+static size_t rtnl_xdp_size(void)
{
size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */
- nla_total_size(1); /* XDP_ATTACHED */
+ nla_total_size(1) + /* XDP_ATTACHED */
+ nla_total_size(4); /* XDP_PROG_ID */
- if (!dev->netdev_ops->ndo_xdp)
- return 0;
- else
- return xdp_size;
+ return xdp_size;
}
static noinline size_t if_nlmsg_size(const struct net_device *dev,
@@ -937,6 +934,7 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev,
+ nla_total_size(1) /* IFLA_LINKMODE */
+ nla_total_size(4) /* IFLA_CARRIER_CHANGES */
+ nla_total_size(4) /* IFLA_LINK_NETNSID */
+ + nla_total_size(4) /* IFLA_GROUP */
+ nla_total_size(ext_filter_mask
& RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */
+ rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */
@@ -946,7 +944,8 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev,
+ nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */
+ nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */
+ nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */
- + rtnl_xdp_size(dev) /* IFLA_XDP */
+ + rtnl_xdp_size() /* IFLA_XDP */
+ + nla_total_size(4) /* IFLA_EVENT */
+ nla_total_size(1); /* IFLA_PROTO_DOWN */
}
@@ -1059,7 +1058,7 @@ static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev)
return err;
}
- if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name))
+ if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name))
return -EMSGSIZE;
return 0;
@@ -1130,6 +1129,8 @@ static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
struct ifla_vf_mac vf_mac;
struct ifla_vf_info ivi;
+ memset(&ivi, 0, sizeof(ivi));
+
/* Not all SR-IOV capable drivers support the
* spoofcheck and "RSS query enable" query. Preset to
* -1 so the user space tool can detect that the driver
@@ -1138,7 +1139,6 @@ static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb,
ivi.spoofchk = -1;
ivi.rss_query_en = -1;
ivi.trusted = -1;
- memset(ivi.mac, 0, sizeof(ivi.mac));
/* The default value for VF link state is "auto"
* IFLA_VF_LINK_STATE_AUTO which equals zero
*/
@@ -1252,25 +1252,46 @@ static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev)
return 0;
}
+static u8 rtnl_xdp_attached_mode(struct net_device *dev, u32 *prog_id)
+{
+ const struct net_device_ops *ops = dev->netdev_ops;
+ const struct bpf_prog *generic_xdp_prog;
+
+ ASSERT_RTNL();
+
+ *prog_id = 0;
+ generic_xdp_prog = rtnl_dereference(dev->xdp_prog);
+ if (generic_xdp_prog) {
+ *prog_id = generic_xdp_prog->aux->id;
+ return XDP_ATTACHED_SKB;
+ }
+ if (!ops->ndo_xdp)
+ return XDP_ATTACHED_NONE;
+
+ return __dev_xdp_attached(dev, ops->ndo_xdp, prog_id);
+}
+
static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
{
- struct netdev_xdp xdp_op = {};
struct nlattr *xdp;
+ u32 prog_id;
int err;
- if (!dev->netdev_ops->ndo_xdp)
- return 0;
xdp = nla_nest_start(skb, IFLA_XDP);
if (!xdp)
return -EMSGSIZE;
- xdp_op.command = XDP_QUERY_PROG;
- err = dev->netdev_ops->ndo_xdp(dev, &xdp_op);
- if (err)
- goto err_cancel;
- err = nla_put_u8(skb, IFLA_XDP_ATTACHED, xdp_op.prog_attached);
+
+ err = nla_put_u8(skb, IFLA_XDP_ATTACHED,
+ rtnl_xdp_attached_mode(dev, &prog_id));
if (err)
goto err_cancel;
+ if (prog_id) {
+ err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
+ if (err)
+ goto err_cancel;
+ }
+
nla_nest_end(skb, xdp);
return 0;
@@ -1279,9 +1300,40 @@ err_cancel:
return err;
}
+static u32 rtnl_get_event(unsigned long event)
+{
+ u32 rtnl_event_type = IFLA_EVENT_NONE;
+
+ switch (event) {
+ case NETDEV_REBOOT:
+ rtnl_event_type = IFLA_EVENT_REBOOT;
+ break;
+ case NETDEV_FEAT_CHANGE:
+ rtnl_event_type = IFLA_EVENT_FEATURES;
+ break;
+ case NETDEV_BONDING_FAILOVER:
+ rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER;
+ break;
+ case NETDEV_NOTIFY_PEERS:
+ rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS;
+ break;
+ case NETDEV_RESEND_IGMP:
+ rtnl_event_type = IFLA_EVENT_IGMP_RESEND;
+ break;
+ case NETDEV_CHANGEINFODATA:
+ rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS;
+ break;
+ default:
+ break;
+ }
+
+ return rtnl_event_type;
+}
+
static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
int type, u32 pid, u32 seq, u32 change,
- unsigned int flags, u32 ext_filter_mask)
+ unsigned int flags, u32 ext_filter_mask,
+ u32 event)
{
struct ifinfomsg *ifm;
struct nlmsghdr *nlh;
@@ -1330,6 +1382,11 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down))
goto nla_put_failure;
+ if (event != IFLA_EVENT_NONE) {
+ if (nla_put_u32(skb, IFLA_EVENT, event))
+ goto nla_put_failure;
+ }
+
if (rtnl_fill_link_ifmap(skb, dev))
goto nla_put_failure;
@@ -1464,6 +1521,8 @@ static const struct nla_policy ifla_policy[IFLA_MAX+1] = {
[IFLA_LINK_NETNSID] = { .type = NLA_S32 },
[IFLA_PROTO_DOWN] = { .type = NLA_U8 },
[IFLA_XDP] = { .type = NLA_NESTED },
+ [IFLA_EVENT] = { .type = NLA_U32 },
+ [IFLA_GROUP] = { .type = NLA_U32 },
};
static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = {
@@ -1492,20 +1551,26 @@ static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {
[IFLA_PORT_VF] = { .type = NLA_U32 },
[IFLA_PORT_PROFILE] = { .type = NLA_STRING,
.len = PORT_PROFILE_MAX },
- [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
- .len = sizeof(struct ifla_port_vsi)},
[IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY,
.len = PORT_UUID_MAX },
[IFLA_PORT_HOST_UUID] = { .type = NLA_STRING,
.len = PORT_UUID_MAX },
[IFLA_PORT_REQUEST] = { .type = NLA_U8, },
[IFLA_PORT_RESPONSE] = { .type = NLA_U16, },
+
+ /* Unused, but we need to keep it here since user space could
+ * fill it. It's also broken with regard to NLA_BINARY use in
+ * combination with structs.
+ */
+ [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY,
+ .len = sizeof(struct ifla_port_vsi) },
};
static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = {
[IFLA_XDP_FD] = { .type = NLA_S32 },
[IFLA_XDP_ATTACHED] = { .type = NLA_U8 },
[IFLA_XDP_FLAGS] = { .type = NLA_U32 },
+ [IFLA_XDP_PROG_ID] = { .type = NLA_U32 },
};
static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla)
@@ -1513,7 +1578,8 @@ static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla
const struct rtnl_link_ops *ops = NULL;
struct nlattr *linfo[IFLA_INFO_MAX + 1];
- if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0)
+ if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla,
+ ifla_info_policy, NULL) < 0)
return NULL;
if (linfo[IFLA_INFO_KIND]) {
@@ -1590,8 +1656,8 @@ static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ?
sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
- if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
-
+ if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX,
+ ifla_policy, NULL) >= 0) {
if (tb[IFLA_EXT_MASK])
ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
@@ -1617,14 +1683,14 @@ static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, 0,
flags,
- ext_filter_mask);
- /* If we ran out of room on the first message,
- * we're in trouble
- */
- WARN_ON((err == -EMSGSIZE) && (skb->len == 0));
+ ext_filter_mask, 0);
- if (err < 0)
- goto out;
+ if (err < 0) {
+ if (likely(skb->len))
+ goto out;
+
+ goto out_err;
+ }
nl_dump_check_consistent(cb, nlmsg_hdr(skb));
cont:
@@ -1632,15 +1698,18 @@ cont:
}
}
out:
+ err = skb->len;
+out_err:
cb->args[1] = idx;
cb->args[0] = h;
- return skb->len;
+ return err;
}
-int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len)
+int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len,
+ struct netlink_ext_ack *exterr)
{
- return nla_parse(tb, IFLA_MAX, head, len, ifla_policy);
+ return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr);
}
EXPORT_SYMBOL(rtnl_nla_parse_ifla);
@@ -1905,6 +1974,7 @@ static int do_set_master(struct net_device *dev, int ifindex)
#define DO_SETLINK_NOTIFY 0x03
static int do_setlink(const struct sk_buff *skb,
struct net_device *dev, struct ifinfomsg *ifm,
+ struct netlink_ext_ack *extack,
struct nlattr **tb, char *ifname, int status)
{
const struct net_device_ops *ops = dev->netdev_ops;
@@ -1961,7 +2031,8 @@ static int do_setlink(const struct sk_buff *skb,
struct sockaddr *sa;
int len;
- len = sizeof(sa_family_t) + dev->addr_len;
+ len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len,
+ sizeof(*sa));
sa = kmalloc(len, GFP_KERNEL);
if (!sa) {
err = -ENOMEM;
@@ -2035,8 +2106,8 @@ static int do_setlink(const struct sk_buff *skb,
}
if (tb[IFLA_TXQLEN]) {
- unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]);
- unsigned long orig_len = dev->tx_queue_len;
+ unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]);
+ unsigned int orig_len = dev->tx_queue_len;
if (dev->tx_queue_len ^ value) {
dev->tx_queue_len = value;
@@ -2076,7 +2147,7 @@ static int do_setlink(const struct sk_buff *skb,
goto errout;
}
err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr,
- ifla_vf_policy);
+ ifla_vf_policy, NULL);
if (err < 0)
goto errout;
err = do_setvfinfo(dev, vfinfo);
@@ -2104,7 +2175,7 @@ static int do_setlink(const struct sk_buff *skb,
goto errout;
}
err = nla_parse_nested(port, IFLA_PORT_MAX, attr,
- ifla_port_policy);
+ ifla_port_policy, NULL);
if (err < 0)
goto errout;
if (!port[IFLA_PORT_VF]) {
@@ -2124,7 +2195,8 @@ static int do_setlink(const struct sk_buff *skb,
struct nlattr *port[IFLA_PORT_MAX+1];
err = nla_parse_nested(port, IFLA_PORT_MAX,
- tb[IFLA_PORT_SELF], ifla_port_policy);
+ tb[IFLA_PORT_SELF], ifla_port_policy,
+ NULL);
if (err < 0)
goto errout;
@@ -2168,11 +2240,11 @@ static int do_setlink(const struct sk_buff *skb,
u32 xdp_flags = 0;
err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP],
- ifla_xdp_policy);
+ ifla_xdp_policy, NULL);
if (err < 0)
goto errout;
- if (xdp[IFLA_XDP_ATTACHED]) {
+ if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) {
err = -EINVAL;
goto errout;
}
@@ -2183,10 +2255,14 @@ static int do_setlink(const struct sk_buff *skb,
err = -EINVAL;
goto errout;
}
+ if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) {
+ err = -EINVAL;
+ goto errout;
+ }
}
if (xdp[IFLA_XDP_FD]) {
- err = dev_change_xdp_fd(dev,
+ err = dev_change_xdp_fd(dev, extack,
nla_get_s32(xdp[IFLA_XDP_FD]),
xdp_flags);
if (err)
@@ -2208,7 +2284,8 @@ errout:
return err;
}
-static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
+static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct ifinfomsg *ifm;
@@ -2217,7 +2294,8 @@ static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
struct nlattr *tb[IFLA_MAX+1];
char ifname[IFNAMSIZ];
- err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
+ err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy,
+ extack);
if (err < 0)
goto errout;
@@ -2244,7 +2322,7 @@ static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
if (err < 0)
goto errout;
- err = do_setlink(skb, dev, ifm, tb, ifname, 0);
+ err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0);
errout:
return err;
}
@@ -2301,7 +2379,8 @@ int rtnl_delete_link(struct net_device *dev)
}
EXPORT_SYMBOL_GPL(rtnl_delete_link);
-static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
+static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct net_device *dev;
@@ -2310,7 +2389,7 @@ static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
struct nlattr *tb[IFLA_MAX+1];
int err;
- err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
+ err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
if (err < 0)
return err;
@@ -2356,7 +2435,6 @@ struct net_device *rtnl_create_link(struct net *net,
const char *ifname, unsigned char name_assign_type,
const struct rtnl_link_ops *ops, struct nlattr *tb[])
{
- int err;
struct net_device *dev;
unsigned int num_tx_queues = 1;
unsigned int num_rx_queues = 1;
@@ -2371,11 +2449,10 @@ struct net_device *rtnl_create_link(struct net *net,
else if (ops->get_num_rx_queues)
num_rx_queues = ops->get_num_rx_queues();
- err = -ENOMEM;
dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type,
ops->setup, num_tx_queues, num_rx_queues);
if (!dev)
- goto err;
+ return ERR_PTR(-ENOMEM);
dev_net_set(dev, net);
dev->rtnl_link_ops = ops;
@@ -2401,15 +2478,13 @@ struct net_device *rtnl_create_link(struct net *net,
dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP]));
return dev;
-
-err:
- return ERR_PTR(err);
}
EXPORT_SYMBOL(rtnl_create_link);
static int rtnl_group_changelink(const struct sk_buff *skb,
struct net *net, int group,
struct ifinfomsg *ifm,
+ struct netlink_ext_ack *extack,
struct nlattr **tb)
{
struct net_device *dev, *aux;
@@ -2417,7 +2492,7 @@ static int rtnl_group_changelink(const struct sk_buff *skb,
for_each_netdev_safe(net, dev, aux) {
if (dev->group == group) {
- err = do_setlink(skb, dev, ifm, tb, NULL, 0);
+ err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0);
if (err < 0)
return err;
}
@@ -2426,7 +2501,8 @@ static int rtnl_group_changelink(const struct sk_buff *skb,
return 0;
}
-static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
+static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
const struct rtnl_link_ops *ops;
@@ -2444,7 +2520,7 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh)
#ifdef CONFIG_MODULES
replay:
#endif
- err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
+ err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
if (err < 0)
return err;
@@ -2475,7 +2551,8 @@ replay:
if (tb[IFLA_LINKINFO]) {
err = nla_parse_nested(linkinfo, IFLA_INFO_MAX,
- tb[IFLA_LINKINFO], ifla_info_policy);
+ tb[IFLA_LINKINFO], ifla_info_policy,
+ NULL);
if (err < 0)
return err;
} else
@@ -2500,13 +2577,13 @@ replay:
if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) {
err = nla_parse_nested(attr, ops->maxtype,
linkinfo[IFLA_INFO_DATA],
- ops->policy);
+ ops->policy, NULL);
if (err < 0)
return err;
data = attr;
}
if (ops->validate) {
- err = ops->validate(tb, data);
+ err = ops->validate(tb, data, extack);
if (err < 0)
return err;
}
@@ -2518,13 +2595,15 @@ replay:
err = nla_parse_nested(slave_attr,
m_ops->slave_maxtype,
linkinfo[IFLA_INFO_SLAVE_DATA],
- m_ops->slave_policy);
+ m_ops->slave_policy,
+ NULL);
if (err < 0)
return err;
slave_data = slave_attr;
}
if (m_ops->slave_validate) {
- err = m_ops->slave_validate(tb, slave_data);
+ err = m_ops->slave_validate(tb, slave_data,
+ extack);
if (err < 0)
return err;
}
@@ -2543,7 +2622,7 @@ replay:
!ops->changelink)
return -EOPNOTSUPP;
- err = ops->changelink(dev, tb, data);
+ err = ops->changelink(dev, tb, data, extack);
if (err < 0)
return err;
status |= DO_SETLINK_NOTIFY;
@@ -2554,24 +2633,26 @@ replay:
return -EOPNOTSUPP;
err = m_ops->slave_changelink(master_dev, dev,
- tb, slave_data);
+ tb, slave_data,
+ extack);
if (err < 0)
return err;
status |= DO_SETLINK_NOTIFY;
}
- return do_setlink(skb, dev, ifm, tb, ifname, status);
+ return do_setlink(skb, dev, ifm, extack, tb, ifname,
+ status);
}
if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
if (ifm->ifi_index == 0 && tb[IFLA_GROUP])
return rtnl_group_changelink(skb, net,
nla_get_u32(tb[IFLA_GROUP]),
- ifm, tb);
+ ifm, extack, tb);
return -ENODEV;
}
- if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
+ if (tb[IFLA_MAP] || tb[IFLA_PROTINFO])
return -EOPNOTSUPP;
if (!ops) {
@@ -2627,7 +2708,8 @@ replay:
dev->ifindex = ifm->ifi_index;
if (ops->newlink) {
- err = ops->newlink(link_net ? : net, dev, tb, data);
+ err = ops->newlink(link_net ? : net, dev, tb, data,
+ extack);
/* Drivers should call free_netdev() in ->destructor
* and unregister it on failure after registration
* so that device could be finally freed in rtnl_unlock.
@@ -2653,6 +2735,11 @@ replay:
if (err < 0)
goto out_unregister;
}
+ if (tb[IFLA_MASTER]) {
+ err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]));
+ if (err)
+ goto out_unregister;
+ }
out:
if (link_net)
put_net(link_net);
@@ -2671,7 +2758,8 @@ out_unregister:
}
}
-static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
+static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct ifinfomsg *ifm;
@@ -2682,7 +2770,7 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
int err;
u32 ext_filter_mask = 0;
- err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
+ err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack);
if (err < 0)
return err;
@@ -2708,7 +2796,7 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh)
return -ENOBUFS;
err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid,
- nlh->nlmsg_seq, 0, 0, ext_filter_mask);
+ nlh->nlmsg_seq, 0, 0, ext_filter_mask, 0);
if (err < 0) {
/* -EMSGSIZE implies BUG in if_nlmsg_size */
WARN_ON(err == -EMSGSIZE);
@@ -2732,7 +2820,7 @@ static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh)
hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ?
sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg);
- if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) {
+ if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) {
if (tb[IFLA_EXT_MASK])
ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]);
}
@@ -2780,7 +2868,8 @@ static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
}
struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
- unsigned int change, gfp_t flags)
+ unsigned int change,
+ u32 event, gfp_t flags)
{
struct net *net = dev_net(dev);
struct sk_buff *skb;
@@ -2791,7 +2880,7 @@ struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev,
if (skb == NULL)
goto errout;
- err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0);
+ err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0, event);
if (err < 0) {
/* -EMSGSIZE implies BUG in if_nlmsg_size() */
WARN_ON(err == -EMSGSIZE);
@@ -2812,18 +2901,25 @@ void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags)
rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags);
}
-void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
- gfp_t flags)
+static void rtmsg_ifinfo_event(int type, struct net_device *dev,
+ unsigned int change, u32 event,
+ gfp_t flags)
{
struct sk_buff *skb;
if (dev->reg_state != NETREG_REGISTERED)
return;
- skb = rtmsg_ifinfo_build_skb(type, dev, change, flags);
+ skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags);
if (skb)
rtmsg_ifinfo_send(skb, dev, flags);
}
+
+void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change,
+ gfp_t flags)
+{
+ rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags);
+}
EXPORT_SYMBOL(rtmsg_ifinfo);
static int nlmsg_populate_fdb_fill(struct sk_buff *skb,
@@ -2953,7 +3049,8 @@ static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid)
return 0;
}
-static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
+static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct ndmsg *ndm;
@@ -2963,7 +3060,7 @@ static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
u16 vid;
int err;
- err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
+ err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
if (err < 0)
return err;
@@ -3053,7 +3150,8 @@ int ndo_dflt_fdb_del(struct ndmsg *ndm,
}
EXPORT_SYMBOL(ndo_dflt_fdb_del);
-static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
+static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct ndmsg *ndm;
@@ -3066,7 +3164,7 @@ static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
if (!netlink_capable(skb, CAP_NET_ADMIN))
return -EPERM;
- err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
+ err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack);
if (err < 0)
return err;
@@ -3201,8 +3299,11 @@ static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
int err = 0;
int fidx = 0;
- if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX,
- ifla_policy) == 0) {
+ err = nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb,
+ IFLA_MAX, ifla_policy, NULL);
+ if (err < 0) {
+ return -EINVAL;
+ } else if (err == 0) {
if (tb[IFLA_MASTER])
br_idx = nla_get_u32(tb[IFLA_MASTER]);
}
@@ -3425,8 +3526,12 @@ static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
err = br_dev->netdev_ops->ndo_bridge_getlink(
skb, portid, seq, dev,
filter_mask, NLM_F_MULTI);
- if (err < 0 && err != -EOPNOTSUPP)
- break;
+ if (err < 0 && err != -EOPNOTSUPP) {
+ if (likely(skb->len))
+ break;
+
+ goto out_err;
+ }
}
idx++;
}
@@ -3437,16 +3542,22 @@ static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb)
seq, dev,
filter_mask,
NLM_F_MULTI);
- if (err < 0 && err != -EOPNOTSUPP)
- break;
+ if (err < 0 && err != -EOPNOTSUPP) {
+ if (likely(skb->len))
+ break;
+
+ goto out_err;
+ }
}
idx++;
}
}
+ err = skb->len;
+out_err:
rcu_read_unlock();
cb->args[0] = idx;
- return skb->len;
+ return err;
}
static inline size_t bridge_nlmsg_size(void)
@@ -3496,7 +3607,8 @@ errout:
return err;
}
-static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh)
+static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct ifinfomsg *ifm;
@@ -3570,7 +3682,8 @@ out:
return err;
}
-static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh)
+static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct ifinfomsg *ifm;
@@ -3829,6 +3942,39 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev,
*idxattr = 0;
}
+ if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) {
+ struct rtnl_af_ops *af_ops;
+
+ *idxattr = IFLA_STATS_AF_SPEC;
+ attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC);
+ if (!attr)
+ goto nla_put_failure;
+
+ list_for_each_entry(af_ops, &rtnl_af_ops, list) {
+ if (af_ops->fill_stats_af) {
+ struct nlattr *af;
+ int err;
+
+ af = nla_nest_start(skb, af_ops->family);
+ if (!af)
+ goto nla_put_failure;
+
+ err = af_ops->fill_stats_af(skb, dev);
+
+ if (err == -ENODATA)
+ nla_nest_cancel(skb, af);
+ else if (err < 0)
+ goto nla_put_failure;
+
+ nla_nest_end(skb, af);
+ }
+ }
+
+ nla_nest_end(skb, attr);
+
+ *idxattr = 0;
+ }
+
nlmsg_end(skb, nlh);
return 0;
@@ -3885,10 +4031,28 @@ static size_t if_nlmsg_stats_size(const struct net_device *dev,
if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0))
size += rtnl_get_offload_stats_size(dev);
+ if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) {
+ struct rtnl_af_ops *af_ops;
+
+ /* for IFLA_STATS_AF_SPEC */
+ size += nla_total_size(0);
+
+ list_for_each_entry(af_ops, &rtnl_af_ops, list) {
+ if (af_ops->get_stats_af_size) {
+ size += nla_total_size(
+ af_ops->get_stats_af_size(dev));
+
+ /* for AF_* */
+ size += nla_total_size(0);
+ }
+ }
+ }
+
return size;
}
-static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh)
+static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct net_device *dev = NULL;
@@ -3994,7 +4158,8 @@ out:
/* Process one rtnetlink message. */
-static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
rtnl_doit_func doit;
@@ -4049,7 +4214,7 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (doit == NULL)
return -EOPNOTSUPP;
- return doit(skb, nlh);
+ return doit(skb, nlh, extack);
}
static void rtnetlink_rcv(struct sk_buff *skb)
@@ -4059,27 +4224,35 @@ static void rtnetlink_rcv(struct sk_buff *skb)
rtnl_unlock();
}
+static int rtnetlink_bind(struct net *net, int group)
+{
+ switch (group) {
+ case RTNLGRP_IPV4_MROUTE_R:
+ case RTNLGRP_IPV6_MROUTE_R:
+ if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
+ return -EPERM;
+ break;
+ }
+ return 0;
+}
+
static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
switch (event) {
- case NETDEV_UP:
- case NETDEV_DOWN:
- case NETDEV_PRE_UP:
- case NETDEV_POST_INIT:
- case NETDEV_REGISTER:
- case NETDEV_CHANGE:
- case NETDEV_PRE_TYPE_CHANGE:
- case NETDEV_GOING_DOWN:
- case NETDEV_UNREGISTER:
- case NETDEV_UNREGISTER_FINAL:
- case NETDEV_RELEASE:
- case NETDEV_JOIN:
- case NETDEV_BONDING_INFO:
+ case NETDEV_REBOOT:
+ case NETDEV_CHANGEADDR:
+ case NETDEV_CHANGENAME:
+ case NETDEV_FEAT_CHANGE:
+ case NETDEV_BONDING_FAILOVER:
+ case NETDEV_NOTIFY_PEERS:
+ case NETDEV_RESEND_IGMP:
+ case NETDEV_CHANGEINFODATA:
+ rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event),
+ GFP_KERNEL);
break;
default:
- rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);
break;
}
return NOTIFY_DONE;
@@ -4098,6 +4271,7 @@ static int __net_init rtnetlink_net_init(struct net *net)
.input = rtnetlink_rcv,
.cb_mutex = &rtnl_mutex,
.flags = NL_CFG_F_NONROOT_RECV,
+ .bind = rtnetlink_bind,
};
sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg);
@@ -4133,6 +4307,7 @@ void __init rtnetlink_init(void)
rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL);
rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL);
+ rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, NULL);
rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL);
rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL);
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