// SPDX-License-Identifier: GPL-2.0-only
#include <linux/netdevice.h>
#include <linux/notifier.h>
#include <linux/rtnetlink.h>
#include <net/busy_poll.h>
#include <net/net_namespace.h>
#include <net/netdev_queues.h>
#include <net/netdev_rx_queue.h>
#include <net/sock.h>
#include <net/xdp.h>
#include <net/xdp_sock.h>
#include "dev.h"
#include "devmem.h"
#include "netdev-genl-gen.h"
struct netdev_nl_dump_ctx {
unsigned long ifindex;
unsigned int rxq_idx;
unsigned int txq_idx;
unsigned int napi_id;
};
static struct netdev_nl_dump_ctx *netdev_dump_ctx(struct netlink_callback *cb)
{
NL_ASSERT_DUMP_CTX_FITS(struct netdev_nl_dump_ctx);
return (struct netdev_nl_dump_ctx *)cb->ctx;
}
static int
netdev_nl_dev_fill(struct net_device *netdev, struct sk_buff *rsp,
const struct genl_info *info)
{
u64 xsk_features = 0;
u64 xdp_rx_meta = 0;
void *hdr;
hdr = genlmsg_iput(rsp, info);
if (!hdr)
return -EMSGSIZE;
#define XDP_METADATA_KFUNC(_, flag, __, xmo) \
if (netdev->xdp_metadata_ops && netdev->xdp_metadata_ops->xmo) \
xdp_rx_meta |= flag;
XDP_METADATA_KFUNC_xxx
#undef XDP_METADATA_KFUNC
if (netdev->xsk_tx_metadata_ops) {
if (netdev->xsk_tx_metadata_ops->tmo_fill_timestamp)
xsk_features |= NETDEV_XSK_FLAGS_TX_TIMESTAMP;
if (netdev->xsk_tx_metadata_ops->tmo_request_checksum)
xsk_features |= NETDEV_XSK_FLAGS_TX_CHECKSUM;
}
if (nla_put_u32(rsp, NETDEV_A_DEV_IFINDEX, netdev->ifindex) ||
nla_put_u64_64bit(rsp, NETDEV_A_DEV_XDP_FEATURES,
netdev->xdp_features, NETDEV_A_DEV_PAD) ||
nla_put_u64_64bit(rsp, NETDEV_A_DEV_XDP_RX_METADATA_FEATURES,
xdp_rx_meta, NETDEV_A_DEV_PAD) ||
nla_put_u64_64bit(rsp, NETDEV_A_DEV_XSK_FEATURES,
xsk_features, NETDEV_A_DEV_PAD))
goto err_cancel_msg;
if (netdev->xdp_features & NETDEV_XDP_ACT_XSK_ZEROCOPY) {
if (nla_put_u32(rsp, NETDEV_A_DEV_XDP_ZC_MAX_SEGS,
netdev->xdp_zc_max_segs))
goto err_cancel_msg;
}
genlmsg_end(rsp, hdr);
return 0;
err_cancel_msg:
genlmsg_cancel(rsp, hdr);
return -EMSGSIZE;
}
static void
netdev_genl_dev_notify(struct net_device *netdev, int cmd)
{
struct genl_info info;
struct sk_buff *ntf;
if (!genl_has_listeners(&netdev_nl_family, dev_net(netdev),
NETDEV_NLGRP_MGMT))
return;
genl_info_init_ntf(&info, &netdev_nl_family, cmd);
ntf = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!ntf)
return;
if (netdev_nl_dev_fill(netdev, ntf, &info)) {
nlmsg_free(ntf);
return;
}
genlmsg_multicast_netns(&netdev_nl_family, dev_net(netdev), ntf,
0, NETDEV_NLGRP_MGMT, GFP_KERNEL);
}
int netdev_nl_dev_get_doit(struct sk_buff *skb, struct genl_info *info)
{
struct net_device *netdev;
struct sk_buff *rsp;
u32 ifindex;
int err;
if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_DEV_IFINDEX))
return -EINVAL;
ifindex = nla_get_u32(info->attrs[NETDEV_A_DEV_IFINDEX]);
rsp = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!rsp)
return -ENOMEM;
rtnl_lock();
netdev = __dev_get_by_index(genl_info_net(info), ifindex);
if (netdev)
err = netdev_nl_dev_fill(netdev, rsp, info);
else
err = -ENODEV;
rtnl_unlock();
if (err)
goto err_free_msg;
return genlmsg_reply(rsp, info);
err_free_msg:
nlmsg_free(rsp);
return err;
}
int netdev_nl_dev_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
{
struct netdev_nl_dump_ctx *ctx = netdev_dump_ctx(cb);
struct net *net = sock_net(skb->sk);
struct net_device *netdev;
int err = 0;
rtnl_lock();
for_each_netdev_dump(net, netdev, ctx->ifindex) {
err = netdev_nl_dev_fill(netdev, skb, genl_info_dump(cb));
if (err < 0)
break;
}
rtnl_unlock();
return err;
}
static int
netdev_nl_napi_fill_one(struct sk_buff *rsp, struct napi_struct *napi,
const struct genl_info *info)
{
void *hdr;
pid_t pid;
if (WARN_ON_ONCE(!napi->dev))
return -EINVAL;
if (!(napi->dev->flags & IFF_UP))
return 0;
hdr = genlmsg_iput(rsp, info);
if (!hdr)
return -EMSGSIZE;
if (napi->napi_id >= MIN_NAPI_ID &&
nla_put_u32(rsp, NETDEV_A_NAPI_ID, napi->napi_id))
goto nla_put_failure;
if (nla_put_u32(rsp, NETDEV_A_NAPI_IFINDEX, napi->dev->ifindex))
goto nla_put_failure;
if (napi->irq >= 0 && nla_put_u32(rsp, NETDEV_A_NAPI_IRQ, napi->irq))
goto nla_put_failure;
if (napi->thread) {
pid = task_pid_nr(napi->thread);
if (nla_put_u32(rsp, NETDEV_A_NAPI_PID, pid))
goto nla_put_failure;
}
genlmsg_end(rsp, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(rsp, hdr);
return -EMSGSIZE;
}
int netdev_nl_napi_get_doit(struct sk_buff *skb, struct genl_info *info)
{
struct napi_struct *napi;
struct sk_buff *rsp;
u32 napi_id;
int err;
if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_NAPI_ID))
return -EINVAL;
napi_id = nla_get_u32(info->attrs[NETDEV_A_NAPI_ID]);
rsp = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!rsp)
return -ENOMEM;
rtnl_lock();
napi = napi_by_id(napi_id);
if (napi) {
err = netdev_nl_napi_fill_one(rsp, napi, info);
} else {
NL_SET_BAD_ATTR(info->extack, info->attrs[NETDEV_A_NAPI_ID]);
err = -ENOENT;
}
rtnl_unlock();
if (err)
goto err_free_msg;
return genlmsg_reply(rsp, info);
err_free_msg:
nlmsg_free(rsp);
return err;
}
static int
netdev_nl_napi_dump_one(struct net_device *netdev, struct sk_buff *rsp,
const struct genl_info *info,
struct netdev_nl_dump_ctx *ctx)
{
struct napi_struct *napi;
int err = 0;
if (!(netdev->flags & IFF_UP))
return err;
list_for_each_entry(napi, &netdev->napi_list, dev_list) {
if (ctx->napi_id && napi->napi_id >= ctx->napi_id)
continue;
err = netdev_nl_napi_fill_one(rsp, napi, info);
if (err)
return err;
ctx->napi_id = napi->napi_id;
}
return err;
}
int netdev_nl_napi_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
{
struct netdev_nl_dump_ctx *ctx = netdev_dump_ctx(cb);
const struct genl_info *info = genl_info_dump(cb);
struct net *net = sock_net(skb->sk);
struct net_device *netdev;
u32 ifindex = 0;
int err = 0;
if (info->attrs[NETDEV_A_NAPI_IFINDEX])
ifindex = nla_get_u32(info->attrs[NETDEV_A_NAPI_IFINDEX]);
rtnl_lock();
if (ifindex) {
netdev = __dev_get_by_index(net, ifindex);
if (netdev)
err = netdev_nl_napi_dump_one(netdev, skb, info, ctx);
else
err = -ENODEV;
} else {
for_each_netdev_dump(net, netdev, ctx->ifindex) {
err = netdev_nl_napi_dump_one(netdev, skb, info, ctx);
if (err < 0)
break;
ctx->napi_id = 0;
}
}
rtnl_unlock();
return err;
}
static int
netdev_nl_queue_fill_one(struct sk_buff *rsp, struct net_device *netdev,
u32 q_idx, u32 q_type, const struct genl_info *info)
{
struct net_devmem_dmabuf_binding *binding;
struct netdev_rx_queue *rxq;
struct netdev_queue *txq;
void *hdr;
hdr = genlmsg_iput(rsp, info);
if (!hdr)
return -EMSGSIZE;
if (nla_put_u32(rsp, NETDEV_A_QUEUE_ID, q_idx) ||
nla_put_u32(rsp, NETDEV_A_QUEUE_TYPE, q_type) ||
nla_put_u32(rsp, NETDEV_A_QUEUE_IFINDEX, netdev->ifindex))
goto nla_put_failure;
switch (q_type) {
case NETDEV_QUEUE_TYPE_RX:
rxq = __netif_get_rx_queue(netdev, q_idx);
if (rxq->napi && nla_put_u32(rsp, NETDEV_A_QUEUE_NAPI_ID,
rxq->napi->napi_id))
goto nla_put_failure;
binding = rxq->mp_params.mp_priv;
if (binding &&
nla_put_u32(rsp, NETDEV_A_QUEUE_DMABUF, binding->id))
goto nla_put_failure;
break;
case NETDEV_QUEUE_TYPE_TX:
txq = netdev_get_tx_queue(netdev, q_idx);
if (txq->napi && nla_put_u32(rsp, NETDEV_A_QUEUE_NAPI_ID,
txq->napi->napi_id))
goto nla_put_failure;
}
genlmsg_end(rsp, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(rsp, hdr);
return -EMSGSIZE;
}
static int netdev_nl_queue_validate(struct net_device *netdev, u32 q_id,
u32 q_type)
{
switch (q_type) {
case NETDEV_QUEUE_TYPE_RX:
if (q_id >= netdev->real_num_rx_queues)
return -EINVAL;
return 0;
case NETDEV_QUEUE_TYPE_TX:
if (q_id >= netdev->real_num_tx_queues)
return -EINVAL;
}
return 0;
}
static int
netdev_nl_queue_fill(struct sk_buff *rsp, struct net_device *netdev, u32 q_idx,
u32 q_type, const struct genl_info *info)
{
int err = 0;
if (!(netdev->flags & IFF_UP))
return err;
err = netdev_nl_queue_validate(netdev, q_idx, q_type);
if (err)
return err;
return netdev_nl_queue_fill_one(rsp, netdev, q_idx, q_type, info);
}
int netdev_nl_queue_get_doit(struct sk_buff *skb, struct genl_info *info)
{
u32 q_id, q_type, ifindex;
struct net_device *netdev;
struct sk_buff *rsp;
int err;
if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_QUEUE_ID) ||
GENL_REQ_ATTR_CHECK(info, NETDEV_A_QUEUE_TYPE) ||
GENL_REQ_ATTR_CHECK(info, NETDEV_A_QUEUE_IFINDEX))
return -EINVAL;
q_id = nla_get_u32(info->attrs[NETDEV_A_QUEUE_ID]);
q_type = nla_get_u32(info->attrs[NETDEV_A_QUEUE_TYPE]);
ifindex = nla_get_u32(info->attrs[NETDEV_A_QUEUE_IFINDEX]);
rsp = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!rsp)
return -ENOMEM;
rtnl_lock();
netdev = __dev_get_by_index(genl_info_net(info), ifindex);
if (netdev)
err = netdev_nl_queue_fill(rsp, netdev, q_id, q_type, info);
else
err = -ENODEV;
rtnl_unlock();
if (err)
goto err_free_msg;
return genlmsg_reply(rsp, info);
err_free_msg:
nlmsg_free(rsp);
return err;
}
static int
netdev_nl_queue_dump_one(struct net_device *netdev, struct sk_buff *rsp,
const struct genl_info *info,
struct netdev_nl_dump_ctx *ctx)
{
int err = 0;
int i;
if (!(netdev->flags & IFF_UP))
return err;
for (i = ctx->rxq_idx; i < netdev->real_num_rx_queues;) {
err = netdev_nl_queue_fill_one(rsp, netdev, i,
NETDEV_QUEUE_TYPE_RX, info);
if (err)
return err;
ctx->rxq_idx = i++;
}
for (i = ctx->txq_idx; i < netdev->real_num_tx_queues;) {
err = netdev_nl_queue_fill_one(rsp, netdev, i,
NETDEV_QUEUE_TYPE_TX, info);
if (err)
return err;
ctx->txq_idx = i++;
}
return err;
}
int netdev_nl_queue_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
{
struct netdev_nl_dump_ctx *ctx = netdev_dump_ctx(cb);
const struct genl_info *info = genl_info_dump(cb);
struct net *net = sock_net(skb->sk);
struct net_device *netdev;
u32 ifindex = 0;
int err = 0;
if (info->attrs[NETDEV_A_QUEUE_IFINDEX])
ifindex = nla_get_u32(info->attrs[NETDEV_A_QUEUE_IFINDEX]);
rtnl_lock();
if (ifindex) {
netdev = __dev_get_by_index(net, ifindex);
if (netdev)
err = netdev_nl_queue_dump_one(netdev, skb, info, ctx);
else
err = -ENODEV;
} else {
for_each_netdev_dump(net, netdev, ctx->ifindex) {
err = netdev_nl_queue_dump_one(netdev, skb, info, ctx);
if (err < 0)
break;
ctx->rxq_idx = 0;
ctx->txq_idx = 0;
}
}
rtnl_unlock();
return err;
}
#define NETDEV_STAT_NOT_SET (~0ULL)
static void netdev_nl_stats_add(void *_sum, const void *_add, size_t size)
{
const u64 *add = _add;
u64 *sum = _sum;
while (size) {
if (*add != NETDEV_STAT_NOT_SET && *sum != NETDEV_STAT_NOT_SET)
*sum += *add;
sum++;
add++;
size -= 8;
}
}
static int netdev_stat_put(struct sk_buff *rsp, unsigned int attr_id, u64 value)
{
if (value == NETDEV_STAT_NOT_SET)
return 0;
return nla_put_uint(rsp, attr_id, value);
}
static int
netdev_nl_stats_write_rx(struct sk_buff *rsp, struct netdev_queue_stats_rx *rx)
{
if (netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_PACKETS, rx->packets) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_BYTES, rx->bytes) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_ALLOC_FAIL, rx->alloc_fail) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_HW_DROPS, rx->hw_drops) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_HW_DROP_OVERRUNS, rx->hw_drop_overruns) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_CSUM_UNNECESSARY, rx->csum_unnecessary) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_CSUM_NONE, rx->csum_none) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_CSUM_BAD, rx->csum_bad) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_HW_GRO_PACKETS, rx->hw_gro_packets) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_HW_GRO_BYTES, rx->hw_gro_bytes) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_HW_GRO_WIRE_PACKETS, rx->hw_gro_wire_packets) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_HW_GRO_WIRE_BYTES, rx->hw_gro_wire_bytes) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_RX_HW_DROP_RATELIMITS, rx->hw_drop_ratelimits))
return -EMSGSIZE;
return 0;
}
static int
netdev_nl_stats_write_tx(struct sk_buff *rsp, struct netdev_queue_stats_tx *tx)
{
if (netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_PACKETS, tx->packets) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_BYTES, tx->bytes) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_DROPS, tx->hw_drops) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_DROP_ERRORS, tx->hw_drop_errors) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_CSUM_NONE, tx->csum_none) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_NEEDS_CSUM, tx->needs_csum) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_GSO_PACKETS, tx->hw_gso_packets) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_GSO_BYTES, tx->hw_gso_bytes) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_GSO_WIRE_PACKETS, tx->hw_gso_wire_packets) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_GSO_WIRE_BYTES, tx->hw_gso_wire_bytes) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_DROP_RATELIMITS, tx->hw_drop_ratelimits) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_STOP, tx->stop) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_WAKE, tx->wake))
return -EMSGSIZE;
return 0;
}
static int
netdev_nl_stats_queue(struct net_device *netdev, struct sk_buff *rsp,
u32 q_type, int i, const struct genl_info *info)
{
const struct netdev_stat_ops *ops = netdev->stat_ops;
struct netdev_queue_stats_rx rx;
struct netdev_queue_stats_tx tx;
void *hdr;
hdr = genlmsg_iput(rsp, info);
if (!hdr)
return -EMSGSIZE;
if (nla_put_u32(rsp, NETDEV_A_QSTATS_IFINDEX, netdev->ifindex) ||
nla_put_u32(rsp, NETDEV_A_QSTATS_QUEUE_TYPE, q_type) ||
nla_put_u32(rsp, NETDEV_A_QSTATS_QUEUE_ID, i))
goto nla_put_failure;
switch (q_type) {
case NETDEV_QUEUE_TYPE_RX:
memset(&rx, 0xff, sizeof(rx));
ops->get_queue_stats_rx(netdev, i, &rx);
if (!memchr_inv(&rx, 0xff, sizeof(rx)))
goto nla_cancel;
if (netdev_nl_stats_write_rx(rsp, &rx))
goto nla_put_failure;
break;
case NETDEV_QUEUE_TYPE_TX:
memset(&tx, 0xff, sizeof(tx));
ops->get_queue_stats_tx(netdev, i, &tx);
if (!memchr_inv(&tx, 0xff, sizeof(tx)))
goto nla_cancel;
if (netdev_nl_stats_write_tx(rsp, &tx))
goto nla_put_failure;
break;
}
genlmsg_end(rsp, hdr);
return 0;
nla_cancel:
genlmsg_cancel(rsp, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(rsp, hdr);
return -EMSGSIZE;
}
static int
netdev_nl_stats_by_queue(struct net_device *netdev, struct sk_buff *rsp,
const struct genl_info *info,
struct netdev_nl_dump_ctx *ctx)
{
const struct netdev_stat_ops *ops = netdev->stat_ops;
int i, err;
if (!(netdev->flags & IFF_UP))
return 0;
i = ctx->rxq_idx;
while (ops->get_queue_stats_rx && i < netdev->real_num_rx_queues) {
err = netdev_nl_stats_queue(netdev, rsp, NETDEV_QUEUE_TYPE_RX,
i, info);
if (err)
return err;
ctx->rxq_idx = i++;
}
i = ctx->txq_idx;
while (ops->get_queue_stats_tx && i < netdev->real_num_tx_queues) {
err = netdev_nl_stats_queue(netdev, rsp, NETDEV_QUEUE_TYPE_TX,
i, info);
if (err)
return err;
ctx->txq_idx = i++;
}
ctx->rxq_idx = 0;
ctx->txq_idx = 0;
return 0;
}
static int
netdev_nl_stats_by_netdev(struct net_device *netdev, struct sk_buff *rsp,
const struct genl_info *info)
{
struct netdev_queue_stats_rx rx_sum, rx;
struct netdev_queue_stats_tx tx_sum, tx;
const struct netdev_stat_ops *ops;
void *hdr;
int i;
ops = netdev->stat_ops;
/* Netdev can't guarantee any complete counters */
if (!ops->get_base_stats)
return 0;
memset(&rx_sum, 0xff, sizeof(rx_sum));
memset(&tx_sum, 0xff, sizeof(tx_sum));
ops->get_base_stats(netdev, &rx_sum, &tx_sum);
/* The op was there, but nothing reported, don't bother */
if (!memchr_inv(&rx_sum, 0xff, sizeof(rx_sum)) &&
!memchr_inv(&tx_sum, 0xff, sizeof(tx_sum)))
return 0;
hdr = genlmsg_iput(rsp, info);
if (!hdr)
return -EMSGSIZE;
if (nla_put_u32(rsp, NETDEV_A_QSTATS_IFINDEX, netdev->ifindex))
goto nla_put_failure;
for (i = 0; i < netdev->real_num_rx_queues; i++) {
memset(&rx, 0xff, sizeof(rx));
if (ops->get_queue_stats_rx)
ops->get_queue_stats_rx(netdev, i, &rx);
netdev_nl_stats_add(&rx_sum, &rx, sizeof(rx));
}
for (i = 0; i < netdev->real_num_tx_queues; i++) {
memset(&tx, 0xff, sizeof(tx));
if (ops->get_queue_stats_tx)
ops->get_queue_stats_tx(netdev, i, &tx);
netdev_nl_stats_add(&tx_sum, &tx, sizeof(tx));
}
if (netdev_nl_stats_write_rx(rsp, &rx_sum) ||
netdev_nl_stats_write_tx(rsp, &tx_sum))
goto nla_put_failure;
genlmsg_end(rsp, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(rsp, hdr);
return -EMSGSIZE;
}
static int
netdev_nl_qstats_get_dump_one(struct net_device *netdev, unsigned int scope,
struct sk_buff *skb, const struct genl_info *info,
struct netdev_nl_dump_ctx *ctx)
{
if (!netdev->stat_ops)
return 0;
switch (scope) {
case 0:
return netdev_nl_stats_by_netdev(netdev, skb, info);
case NETDEV_QSTATS_SCOPE_QUEUE:
return netdev_nl_stats_by_queue(netdev, skb, info, ctx);
}
return -EINVAL; /* Should not happen, per netlink policy */
}
int netdev_nl_qstats_get_dumpit(struct sk_buff *skb,
struct netlink_callback *cb)
{
struct netdev_nl_dump_ctx *ctx = netdev_dump_ctx(cb);
const struct genl_info *info = genl_info_dump(cb);
struct net *net = sock_net(skb->sk);
struct net_device *netdev;
unsigned int ifindex;
unsigned int scope;
int err = 0;
scope = 0;
if (info->attrs[NETDEV_A_QSTATS_SCOPE])
scope = nla_get_uint(info->attrs[NETDEV_A_QSTATS_SCOPE]);
ifindex = 0;
if (info->attrs[NETDEV_A_QSTATS_IFINDEX])
ifindex = nla_get_u32(info->attrs[NETDEV_A_QSTATS_IFINDEX]);
rtnl_lock();
if (ifindex) {
netdev = __dev_get_by_index(net, ifindex);
if (netdev && netdev->stat_ops) {
err = netdev_nl_qstats_get_dump_one(netdev, scope, skb,
info, ctx);
} else {
NL_SET_BAD_ATTR(info->extack,
info->attrs[NETDEV_A_QSTATS_IFINDEX]);
err = netdev ? -EOPNOTSUPP : -ENODEV;
}
} else {
for_each_netdev_dump(net, netdev, ctx->ifindex) {
err = netdev_nl_qstats_get_dump_one(netdev, scope, skb,
info, ctx);
if (err < 0)
break;
}
}
rtnl_unlock();
return err;
}
int netdev_nl_bind_rx_doit(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *tb[ARRAY_SIZE(netdev_queue_id_nl_policy)];
struct net_devmem_dmabuf_binding *binding;
struct list_head *sock_binding_list;
u32 ifindex, dmabuf_fd, rxq_idx;
struct net_device *netdev;
struct sk_buff *rsp;
struct nlattr *attr;
int rem, err = 0;
void *hdr;
if (GENL_REQ_ATTR_CHECK(info, NETDEV_A_DEV_IFINDEX) ||
GENL_REQ_ATTR_CHECK(info, NETDEV_A_DMABUF_FD) ||
GENL_REQ_ATTR_CHECK(info, NETDEV_A_DMABUF_QUEUES))
return -EINVAL;
ifindex = nla_get_u32(info->attrs[NETDEV_A_DEV_IFINDEX]);
dmabuf_fd = nla_get_u32(info->attrs[NETDEV_A_DMABUF_FD]);
sock_binding_list = genl_sk_priv_get(&netdev_nl_family,
NETLINK_CB(skb).sk);
if (IS_ERR(sock_binding_list))
return PTR_ERR(sock_binding_list);
rsp = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!rsp)
return -ENOMEM;
hdr = genlmsg_iput(rsp, info);
if (!hdr) {
err = -EMSGSIZE;
goto err_genlmsg_free;
}
rtnl_lock();
netdev = __dev_get_by_index(genl_info_net(info), ifindex);
if (!netdev || !netif_device_present(netdev)) {
err = -ENODEV;
goto err_unlock;
}
if (dev_xdp_prog_count(netdev)) {
NL_SET_ERR_MSG(info->extack, "unable to bind dmabuf to device with XDP program attached");
err = -EEXIST;
goto err_unlock;
}
binding = net_devmem_bind_dmabuf(netdev, dmabuf_fd, info->extack);
if (IS_ERR(binding)) {
err = PTR_ERR(binding);
goto err_unlock;
}
nla_for_each_attr_type(attr, NETDEV_A_DMABUF_QUEUES,
genlmsg_data(info->genlhdr),
genlmsg_len(info->genlhdr), rem) {
err = nla_parse_nested(
tb, ARRAY_SIZE(netdev_queue_id_nl_policy) - 1, attr,
netdev_queue_id_nl_policy, info->extack);
if (err < 0)
goto err_unbind;
if (NL_REQ_ATTR_CHECK(info->extack, attr, tb, NETDEV_A_QUEUE_ID) ||
NL_REQ_ATTR_CHECK(info->extack, attr, tb, NETDEV_A_QUEUE_TYPE)) {
err = -EINVAL;
goto err_unbind;
}
if (nla_get_u32(tb[NETDEV_A_QUEUE_TYPE]) != NETDEV_QUEUE_TYPE_RX) {
NL_SET_BAD_ATTR(info->extack, tb[NETDEV_A_QUEUE_TYPE]);
err = -EINVAL;
goto err_unbind;
}
rxq_idx = nla_get_u32(tb[NETDEV_A_QUEUE_ID]);
err = net_devmem_bind_dmabuf_to_queue(netdev, rxq_idx, binding,
info->extack);
if (err)
goto err_unbind;
}
list_add(&binding->list, sock_binding_list);
nla_put_u32(rsp, NETDEV_A_DMABUF_ID, binding->id);
genlmsg_end(rsp, hdr);
err = genlmsg_reply(rsp, info);
if (err)
goto err_unbind;
rtnl_unlock();
return 0;
err_unbind:
net_devmem_unbind_dmabuf(binding);
err_unlock:
rtnl_unlock();
err_genlmsg_free:
nlmsg_free(rsp);
return err;
}
void netdev_nl_sock_priv_init(struct list_head *priv)
{
INIT_LIST_HEAD(priv);
}
void netdev_nl_sock_priv_destroy(struct list_head *priv)
{
struct net_devmem_dmabuf_binding *binding;
struct net_devmem_dmabuf_binding *temp;
list_for_each_entry_safe(binding, temp, priv, list) {
rtnl_lock();
net_devmem_unbind_dmabuf(binding);
rtnl_unlock();
}
}
static int netdev_genl_netdevice_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
switch (event) {
case NETDEV_REGISTER:
netdev_genl_dev_notify(netdev, NETDEV_CMD_DEV_ADD_NTF);
break;
case NETDEV_UNREGISTER:
netdev_genl_dev_notify(netdev, NETDEV_CMD_DEV_DEL_NTF);
break;
case NETDEV_XDP_FEAT_CHANGE:
netdev_genl_dev_notify(netdev, NETDEV_CMD_DEV_CHANGE_NTF);
break;
}
return NOTIFY_OK;
}
static struct notifier_block netdev_genl_nb = {
.notifier_call = netdev_genl_netdevice_event,
};
static int __init netdev_genl_init(void)
{
int err;
err = register_netdevice_notifier(&netdev_genl_nb);
if (err)
return err;
err = genl_register_family(&netdev_nl_family);
if (err)
goto err_unreg_ntf;
return 0;
err_unreg_ntf:
unregister_netdevice_notifier(&netdev_genl_nb);
return err;
}
subsys_initcall(netdev_genl_init);
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