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linux-stable/net/core/devlink.c
Jiri Pirko e7a981050a devlink: propagate extack down to health reporter ops 
During health reporter operations, driver might want to fill-up
the extack message, so propagate extack down to the health reporter ops.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-10-11 21:02:30 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* net/core/devlink.c - Network physical/parent device Netlink interface
*
* Heavily inspired by net/wireless/
* Copyright (c) 2016 Mellanox Technologies. All rights reserved.
* Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/gfp.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/spinlock.h>
#include <linux/refcount.h>
#include <linux/workqueue.h>
#include <linux/u64_stats_sync.h>
#include <linux/timekeeping.h>
#include <rdma/ib_verbs.h>
#include <net/netlink.h>
#include <net/genetlink.h>
#include <net/rtnetlink.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/devlink.h>
#include <net/drop_monitor.h>
#define CREATE_TRACE_POINTS
#include <trace/events/devlink.h>
static struct devlink_dpipe_field devlink_dpipe_fields_ethernet[] = {
{
.name = "destination mac",
.id = DEVLINK_DPIPE_FIELD_ETHERNET_DST_MAC,
.bitwidth = 48,
},
};
struct devlink_dpipe_header devlink_dpipe_header_ethernet = {
.name = "ethernet",
.id = DEVLINK_DPIPE_HEADER_ETHERNET,
.fields = devlink_dpipe_fields_ethernet,
.fields_count = ARRAY_SIZE(devlink_dpipe_fields_ethernet),
.global = true,
};
EXPORT_SYMBOL(devlink_dpipe_header_ethernet);
static struct devlink_dpipe_field devlink_dpipe_fields_ipv4[] = {
{
.name = "destination ip",
.id = DEVLINK_DPIPE_FIELD_IPV4_DST_IP,
.bitwidth = 32,
},
};
struct devlink_dpipe_header devlink_dpipe_header_ipv4 = {
.name = "ipv4",
.id = DEVLINK_DPIPE_HEADER_IPV4,
.fields = devlink_dpipe_fields_ipv4,
.fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv4),
.global = true,
};
EXPORT_SYMBOL(devlink_dpipe_header_ipv4);
static struct devlink_dpipe_field devlink_dpipe_fields_ipv6[] = {
{
.name = "destination ip",
.id = DEVLINK_DPIPE_FIELD_IPV6_DST_IP,
.bitwidth = 128,
},
};
struct devlink_dpipe_header devlink_dpipe_header_ipv6 = {
.name = "ipv6",
.id = DEVLINK_DPIPE_HEADER_IPV6,
.fields = devlink_dpipe_fields_ipv6,
.fields_count = ARRAY_SIZE(devlink_dpipe_fields_ipv6),
.global = true,
};
EXPORT_SYMBOL(devlink_dpipe_header_ipv6);
EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
static LIST_HEAD(devlink_list);
/* devlink_mutex
*
* An overall lock guarding every operation coming from userspace.
* It also guards devlink devices list and it is taken when
* driver registers/unregisters it.
*/
static DEFINE_MUTEX(devlink_mutex);
struct net *devlink_net(const struct devlink *devlink)
{
return read_pnet(&devlink->_net);
}
EXPORT_SYMBOL_GPL(devlink_net);
static void __devlink_net_set(struct devlink *devlink, struct net *net)
{
write_pnet(&devlink->_net, net);
}
void devlink_net_set(struct devlink *devlink, struct net *net)
{
if (WARN_ON(devlink->registered))
return;
__devlink_net_set(devlink, net);
}
EXPORT_SYMBOL_GPL(devlink_net_set);
static struct devlink *devlink_get_from_attrs(struct net *net,
struct nlattr **attrs)
{
struct devlink *devlink;
char *busname;
char *devname;
if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
return ERR_PTR(-EINVAL);
busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
lockdep_assert_held(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (strcmp(devlink->dev->bus->name, busname) == 0 &&
strcmp(dev_name(devlink->dev), devname) == 0 &&
net_eq(devlink_net(devlink), net))
return devlink;
}
return ERR_PTR(-ENODEV);
}
static struct devlink *devlink_get_from_info(struct genl_info *info)
{
return devlink_get_from_attrs(genl_info_net(info), info->attrs);
}
static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
unsigned int port_index)
{
struct devlink_port *devlink_port;
list_for_each_entry(devlink_port, &devlink->port_list, list) {
if (devlink_port->index == port_index)
return devlink_port;
}
return NULL;
}
static bool devlink_port_index_exists(struct devlink *devlink,
unsigned int port_index)
{
return devlink_port_get_by_index(devlink, port_index);
}
static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
struct nlattr **attrs)
{
if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
struct devlink_port *devlink_port;
devlink_port = devlink_port_get_by_index(devlink, port_index);
if (!devlink_port)
return ERR_PTR(-ENODEV);
return devlink_port;
}
return ERR_PTR(-EINVAL);
}
static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
struct genl_info *info)
{
return devlink_port_get_from_attrs(devlink, info->attrs);
}
struct devlink_sb {
struct list_head list;
unsigned int index;
u32 size;
u16 ingress_pools_count;
u16 egress_pools_count;
u16 ingress_tc_count;
u16 egress_tc_count;
};
static u16 devlink_sb_pool_count(struct devlink_sb *devlink_sb)
{
return devlink_sb->ingress_pools_count + devlink_sb->egress_pools_count;
}
static struct devlink_sb *devlink_sb_get_by_index(struct devlink *devlink,
unsigned int sb_index)
{
struct devlink_sb *devlink_sb;
list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
if (devlink_sb->index == sb_index)
return devlink_sb;
}
return NULL;
}
static bool devlink_sb_index_exists(struct devlink *devlink,
unsigned int sb_index)
{
return devlink_sb_get_by_index(devlink, sb_index);
}
static struct devlink_sb *devlink_sb_get_from_attrs(struct devlink *devlink,
struct nlattr **attrs)
{
if (attrs[DEVLINK_ATTR_SB_INDEX]) {
u32 sb_index = nla_get_u32(attrs[DEVLINK_ATTR_SB_INDEX]);
struct devlink_sb *devlink_sb;
devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
if (!devlink_sb)
return ERR_PTR(-ENODEV);
return devlink_sb;
}
return ERR_PTR(-EINVAL);
}
static struct devlink_sb *devlink_sb_get_from_info(struct devlink *devlink,
struct genl_info *info)
{
return devlink_sb_get_from_attrs(devlink, info->attrs);
}
static int devlink_sb_pool_index_get_from_attrs(struct devlink_sb *devlink_sb,
struct nlattr **attrs,
u16 *p_pool_index)
{
u16 val;
if (!attrs[DEVLINK_ATTR_SB_POOL_INDEX])
return -EINVAL;
val = nla_get_u16(attrs[DEVLINK_ATTR_SB_POOL_INDEX]);
if (val >= devlink_sb_pool_count(devlink_sb))
return -EINVAL;
*p_pool_index = val;
return 0;
}
static int devlink_sb_pool_index_get_from_info(struct devlink_sb *devlink_sb,
struct genl_info *info,
u16 *p_pool_index)
{
return devlink_sb_pool_index_get_from_attrs(devlink_sb, info->attrs,
p_pool_index);
}
static int
devlink_sb_pool_type_get_from_attrs(struct nlattr **attrs,
enum devlink_sb_pool_type *p_pool_type)
{
u8 val;
if (!attrs[DEVLINK_ATTR_SB_POOL_TYPE])
return -EINVAL;
val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_TYPE]);
if (val != DEVLINK_SB_POOL_TYPE_INGRESS &&
val != DEVLINK_SB_POOL_TYPE_EGRESS)
return -EINVAL;
*p_pool_type = val;
return 0;
}
static int
devlink_sb_pool_type_get_from_info(struct genl_info *info,
enum devlink_sb_pool_type *p_pool_type)
{
return devlink_sb_pool_type_get_from_attrs(info->attrs, p_pool_type);
}
static int
devlink_sb_th_type_get_from_attrs(struct nlattr **attrs,
enum devlink_sb_threshold_type *p_th_type)
{
u8 val;
if (!attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE])
return -EINVAL;
val = nla_get_u8(attrs[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE]);
if (val != DEVLINK_SB_THRESHOLD_TYPE_STATIC &&
val != DEVLINK_SB_THRESHOLD_TYPE_DYNAMIC)
return -EINVAL;
*p_th_type = val;
return 0;
}
static int
devlink_sb_th_type_get_from_info(struct genl_info *info,
enum devlink_sb_threshold_type *p_th_type)
{
return devlink_sb_th_type_get_from_attrs(info->attrs, p_th_type);
}
static int
devlink_sb_tc_index_get_from_attrs(struct devlink_sb *devlink_sb,
struct nlattr **attrs,
enum devlink_sb_pool_type pool_type,
u16 *p_tc_index)
{
u16 val;
if (!attrs[DEVLINK_ATTR_SB_TC_INDEX])
return -EINVAL;
val = nla_get_u16(attrs[DEVLINK_ATTR_SB_TC_INDEX]);
if (pool_type == DEVLINK_SB_POOL_TYPE_INGRESS &&
val >= devlink_sb->ingress_tc_count)
return -EINVAL;
if (pool_type == DEVLINK_SB_POOL_TYPE_EGRESS &&
val >= devlink_sb->egress_tc_count)
return -EINVAL;
*p_tc_index = val;
return 0;
}
static int
devlink_sb_tc_index_get_from_info(struct devlink_sb *devlink_sb,
struct genl_info *info,
enum devlink_sb_pool_type pool_type,
u16 *p_tc_index)
{
return devlink_sb_tc_index_get_from_attrs(devlink_sb, info->attrs,
pool_type, p_tc_index);
}
struct devlink_region {
struct devlink *devlink;
struct list_head list;
const char *name;
struct list_head snapshot_list;
u32 max_snapshots;
u32 cur_snapshots;
u64 size;
};
struct devlink_snapshot {
struct list_head list;
struct devlink_region *region;
devlink_snapshot_data_dest_t *data_destructor;
u8 *data;
u32 id;
};
static struct devlink_region *
devlink_region_get_by_name(struct devlink *devlink, const char *region_name)
{
struct devlink_region *region;
list_for_each_entry(region, &devlink->region_list, list)
if (!strcmp(region->name, region_name))
return region;
return NULL;
}
static struct devlink_snapshot *
devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id)
{
struct devlink_snapshot *snapshot;
list_for_each_entry(snapshot, &region->snapshot_list, list)
if (snapshot->id == id)
return snapshot;
return NULL;
}
#define DEVLINK_NL_FLAG_NEED_DEVLINK BIT(0)
#define DEVLINK_NL_FLAG_NEED_PORT BIT(1)
#define DEVLINK_NL_FLAG_NEED_SB BIT(2)
/* The per devlink instance lock is taken by default in the pre-doit
* operation, yet several commands do not require this. The global
* devlink lock is taken and protects from disruption by user-calls.
*/
#define DEVLINK_NL_FLAG_NO_LOCK BIT(3)
static int devlink_nl_pre_doit(const struct genl_ops *ops,
struct sk_buff *skb, struct genl_info *info)
{
struct devlink *devlink;
int err;
mutex_lock(&devlink_mutex);
devlink = devlink_get_from_info(info);
if (IS_ERR(devlink)) {
mutex_unlock(&devlink_mutex);
return PTR_ERR(devlink);
}
if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
mutex_lock(&devlink->lock);
if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
info->user_ptr[0] = devlink;
} else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
struct devlink_port *devlink_port;
devlink_port = devlink_port_get_from_info(devlink, info);
if (IS_ERR(devlink_port)) {
err = PTR_ERR(devlink_port);
goto unlock;
}
info->user_ptr[0] = devlink_port;
}
if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_SB) {
struct devlink_sb *devlink_sb;
devlink_sb = devlink_sb_get_from_info(devlink, info);
if (IS_ERR(devlink_sb)) {
err = PTR_ERR(devlink_sb);
goto unlock;
}
info->user_ptr[1] = devlink_sb;
}
return 0;
unlock:
if (~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
mutex_unlock(&devlink->lock);
mutex_unlock(&devlink_mutex);
return err;
}
static void devlink_nl_post_doit(const struct genl_ops *ops,
struct sk_buff *skb, struct genl_info *info)
{
struct devlink *devlink;
/* When devlink changes netns, it would not be found
* by devlink_get_from_info(). So try if it is stored first.
*/
if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK) {
devlink = info->user_ptr[0];
} else {
devlink = devlink_get_from_info(info);
WARN_ON(IS_ERR(devlink));
}
if (!IS_ERR(devlink) && ~ops->internal_flags & DEVLINK_NL_FLAG_NO_LOCK)
mutex_unlock(&devlink->lock);
mutex_unlock(&devlink_mutex);
}
static struct genl_family devlink_nl_family;
enum devlink_multicast_groups {
DEVLINK_MCGRP_CONFIG,
};
static const struct genl_multicast_group devlink_nl_mcgrps[] = {
[DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
};
static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
{
if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
return -EMSGSIZE;
if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
return -EMSGSIZE;
return 0;
}
static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
enum devlink_command cmd, u32 portid,
u32 seq, int flags)
{
void *hdr;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_FAILED, devlink->reload_failed))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
{
struct sk_buff *msg;
int err;
WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
if (err) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
static int devlink_nl_port_attrs_put(struct sk_buff *msg,
struct devlink_port *devlink_port)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
if (!attrs->set)
return 0;
if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour))
return -EMSGSIZE;
switch (devlink_port->attrs.flavour) {
case DEVLINK_PORT_FLAVOUR_PCI_PF:
if (nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
attrs->pci_pf.pf))
return -EMSGSIZE;
break;
case DEVLINK_PORT_FLAVOUR_PCI_VF:
if (nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER,
attrs->pci_vf.pf) ||
nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER,
attrs->pci_vf.vf))
return -EMSGSIZE;
break;
case DEVLINK_PORT_FLAVOUR_PHYSICAL:
case DEVLINK_PORT_FLAVOUR_CPU:
case DEVLINK_PORT_FLAVOUR_DSA:
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER,
attrs->phys.port_number))
return -EMSGSIZE;
if (!attrs->split)
return 0;
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
attrs->phys.port_number))
return -EMSGSIZE;
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER,
attrs->phys.split_subport_number))
return -EMSGSIZE;
break;
default:
break;
}
return 0;
}
static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
struct devlink_port *devlink_port,
enum devlink_command cmd, u32 portid,
u32 seq, int flags)
{
void *hdr;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
goto nla_put_failure;
spin_lock_bh(&devlink_port->type_lock);
if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
goto nla_put_failure_type_locked;
if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
devlink_port->desired_type))
goto nla_put_failure_type_locked;
if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
struct net_device *netdev = devlink_port->type_dev;
if (netdev &&
(nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
netdev->ifindex) ||
nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
netdev->name)))
goto nla_put_failure_type_locked;
}
if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
struct ib_device *ibdev = devlink_port->type_dev;
if (ibdev &&
nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
ibdev->name))
goto nla_put_failure_type_locked;
}
spin_unlock_bh(&devlink_port->type_lock);
if (devlink_nl_port_attrs_put(msg, devlink_port))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure_type_locked:
spin_unlock_bh(&devlink_port->type_lock);
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static void devlink_port_notify(struct devlink_port *devlink_port,
enum devlink_command cmd)
{
struct devlink *devlink = devlink_port->devlink;
struct sk_buff *msg;
int err;
if (!devlink_port->registered)
return;
WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0);
if (err) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct sk_buff *msg;
int err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
info->snd_portid, info->snd_seq, 0);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink *devlink;
int start = cb->args[0];
int idx = 0;
int err;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
continue;
if (idx < start) {
idx++;
continue;
}
err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI);
if (err)
goto out;
idx++;
}
out:
mutex_unlock(&devlink_mutex);
cb->args[0] = idx;
return msg->len;
}
static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[0];
struct devlink *devlink = devlink_port->devlink;
struct sk_buff *msg;
int err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_port_fill(msg, devlink, devlink_port,
DEVLINK_CMD_PORT_NEW,
info->snd_portid, info->snd_seq, 0);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink *devlink;
struct devlink_port *devlink_port;
int start = cb->args[0];
int idx = 0;
int err;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
continue;
mutex_lock(&devlink->lock);
list_for_each_entry(devlink_port, &devlink->port_list, list) {
if (idx < start) {
idx++;
continue;
}
err = devlink_nl_port_fill(msg, devlink, devlink_port,
DEVLINK_CMD_NEW,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NLM_F_MULTI);
if (err) {
mutex_unlock(&devlink->lock);
goto out;
}
idx++;
}
mutex_unlock(&devlink->lock);
}
out:
mutex_unlock(&devlink_mutex);
cb->args[0] = idx;
return msg->len;
}
static int devlink_port_type_set(struct devlink *devlink,
struct devlink_port *devlink_port,
enum devlink_port_type port_type)
{
int err;
if (devlink->ops->port_type_set) {
if (port_type == DEVLINK_PORT_TYPE_NOTSET)
return -EINVAL;
if (port_type == devlink_port->type)
return 0;
err = devlink->ops->port_type_set(devlink_port, port_type);
if (err)
return err;
devlink_port->desired_type = port_type;
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
return 0;
}
return -EOPNOTSUPP;
}
static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[0];
struct devlink *devlink = devlink_port->devlink;
int err;
if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
enum devlink_port_type port_type;
port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
err = devlink_port_type_set(devlink, devlink_port, port_type);
if (err)
return err;
}
return 0;
}
static int devlink_port_split(struct devlink *devlink, u32 port_index,
u32 count, struct netlink_ext_ack *extack)
{
if (devlink->ops->port_split)
return devlink->ops->port_split(devlink, port_index, count,
extack);
return -EOPNOTSUPP;
}
static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
u32 port_index;
u32 count;
if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
!info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
return -EINVAL;
port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
return devlink_port_split(devlink, port_index, count, info->extack);
}
static int devlink_port_unsplit(struct devlink *devlink, u32 port_index,
struct netlink_ext_ack *extack)
{
if (devlink->ops->port_unsplit)
return devlink->ops->port_unsplit(devlink, port_index, extack);
return -EOPNOTSUPP;
}
static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
u32 port_index;
if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
return -EINVAL;
port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
return devlink_port_unsplit(devlink, port_index, info->extack);
}
static int devlink_nl_sb_fill(struct sk_buff *msg, struct devlink *devlink,
struct devlink_sb *devlink_sb,
enum devlink_command cmd, u32 portid,
u32 seq, int flags)
{
void *hdr;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_SB_SIZE, devlink_sb->size))
goto nla_put_failure;
if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_POOL_COUNT,
devlink_sb->ingress_pools_count))
goto nla_put_failure;
if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_POOL_COUNT,
devlink_sb->egress_pools_count))
goto nla_put_failure;
if (nla_put_u16(msg, DEVLINK_ATTR_SB_INGRESS_TC_COUNT,
devlink_sb->ingress_tc_count))
goto nla_put_failure;
if (nla_put_u16(msg, DEVLINK_ATTR_SB_EGRESS_TC_COUNT,
devlink_sb->egress_tc_count))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int devlink_nl_cmd_sb_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_sb *devlink_sb = info->user_ptr[1];
struct sk_buff *msg;
int err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
DEVLINK_CMD_SB_NEW,
info->snd_portid, info->snd_seq, 0);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink *devlink;
struct devlink_sb *devlink_sb;
int start = cb->args[0];
int idx = 0;
int err;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
continue;
mutex_lock(&devlink->lock);
list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
if (idx < start) {
idx++;
continue;
}
err = devlink_nl_sb_fill(msg, devlink, devlink_sb,
DEVLINK_CMD_SB_NEW,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NLM_F_MULTI);
if (err) {
mutex_unlock(&devlink->lock);
goto out;
}
idx++;
}
mutex_unlock(&devlink->lock);
}
out:
mutex_unlock(&devlink_mutex);
cb->args[0] = idx;
return msg->len;
}
static int devlink_nl_sb_pool_fill(struct sk_buff *msg, struct devlink *devlink,
struct devlink_sb *devlink_sb,
u16 pool_index, enum devlink_command cmd,
u32 portid, u32 seq, int flags)
{
struct devlink_sb_pool_info pool_info;
void *hdr;
int err;
err = devlink->ops->sb_pool_get(devlink, devlink_sb->index,
pool_index, &pool_info);
if (err)
return err;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
goto nla_put_failure;
if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
goto nla_put_failure;
if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_info.pool_type))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_SIZE, pool_info.size))
goto nla_put_failure;
if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
pool_info.threshold_type))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_CELL_SIZE,
pool_info.cell_size))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int devlink_nl_cmd_sb_pool_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_sb *devlink_sb = info->user_ptr[1];
struct sk_buff *msg;
u16 pool_index;
int err;
err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
&pool_index);
if (err)
return err;
if (!devlink->ops->sb_pool_get)
return -EOPNOTSUPP;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_sb_pool_fill(msg, devlink, devlink_sb, pool_index,
DEVLINK_CMD_SB_POOL_NEW,
info->snd_portid, info->snd_seq, 0);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int __sb_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
struct devlink *devlink,
struct devlink_sb *devlink_sb,
u32 portid, u32 seq)
{
u16 pool_count = devlink_sb_pool_count(devlink_sb);
u16 pool_index;
int err;
for (pool_index = 0; pool_index < pool_count; pool_index++) {
if (*p_idx < start) {
(*p_idx)++;
continue;
}
err = devlink_nl_sb_pool_fill(msg, devlink,
devlink_sb,
pool_index,
DEVLINK_CMD_SB_POOL_NEW,
portid, seq, NLM_F_MULTI);
if (err)
return err;
(*p_idx)++;
}
return 0;
}
static int devlink_nl_cmd_sb_pool_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink *devlink;
struct devlink_sb *devlink_sb;
int start = cb->args[0];
int idx = 0;
int err = 0;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
!devlink->ops->sb_pool_get)
continue;
mutex_lock(&devlink->lock);
list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
err = __sb_pool_get_dumpit(msg, start, &idx, devlink,
devlink_sb,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq);
if (err && err != -EOPNOTSUPP) {
mutex_unlock(&devlink->lock);
goto out;
}
}
mutex_unlock(&devlink->lock);
}
out:
mutex_unlock(&devlink_mutex);
if (err != -EMSGSIZE)
return err;
cb->args[0] = idx;
return msg->len;
}
static int devlink_sb_pool_set(struct devlink *devlink, unsigned int sb_index,
u16 pool_index, u32 size,
enum devlink_sb_threshold_type threshold_type,
struct netlink_ext_ack *extack)
{
const struct devlink_ops *ops = devlink->ops;
if (ops->sb_pool_set)
return ops->sb_pool_set(devlink, sb_index, pool_index,
size, threshold_type, extack);
return -EOPNOTSUPP;
}
static int devlink_nl_cmd_sb_pool_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_sb *devlink_sb = info->user_ptr[1];
enum devlink_sb_threshold_type threshold_type;
u16 pool_index;
u32 size;
int err;
err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
&pool_index);
if (err)
return err;
err = devlink_sb_th_type_get_from_info(info, &threshold_type);
if (err)
return err;
if (!info->attrs[DEVLINK_ATTR_SB_POOL_SIZE])
return -EINVAL;
size = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_POOL_SIZE]);
return devlink_sb_pool_set(devlink, devlink_sb->index,
pool_index, size, threshold_type,
info->extack);
}
static int devlink_nl_sb_port_pool_fill(struct sk_buff *msg,
struct devlink *devlink,
struct devlink_port *devlink_port,
struct devlink_sb *devlink_sb,
u16 pool_index,
enum devlink_command cmd,
u32 portid, u32 seq, int flags)
{
const struct devlink_ops *ops = devlink->ops;
u32 threshold;
void *hdr;
int err;
err = ops->sb_port_pool_get(devlink_port, devlink_sb->index,
pool_index, &threshold);
if (err)
return err;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
goto nla_put_failure;
if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
goto nla_put_failure;
if (ops->sb_occ_port_pool_get) {
u32 cur;
u32 max;
err = ops->sb_occ_port_pool_get(devlink_port, devlink_sb->index,
pool_index, &cur, &max);
if (err && err != -EOPNOTSUPP)
return err;
if (!err) {
if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
goto nla_put_failure;
}
}
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int devlink_nl_cmd_sb_port_pool_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[0];
struct devlink *devlink = devlink_port->devlink;
struct devlink_sb *devlink_sb = info->user_ptr[1];
struct sk_buff *msg;
u16 pool_index;
int err;
err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
&pool_index);
if (err)
return err;
if (!devlink->ops->sb_port_pool_get)
return -EOPNOTSUPP;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_sb_port_pool_fill(msg, devlink, devlink_port,
devlink_sb, pool_index,
DEVLINK_CMD_SB_PORT_POOL_NEW,
info->snd_portid, info->snd_seq, 0);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int __sb_port_pool_get_dumpit(struct sk_buff *msg, int start, int *p_idx,
struct devlink *devlink,
struct devlink_sb *devlink_sb,
u32 portid, u32 seq)
{
struct devlink_port *devlink_port;
u16 pool_count = devlink_sb_pool_count(devlink_sb);
u16 pool_index;
int err;
list_for_each_entry(devlink_port, &devlink->port_list, list) {
for (pool_index = 0; pool_index < pool_count; pool_index++) {
if (*p_idx < start) {
(*p_idx)++;
continue;
}
err = devlink_nl_sb_port_pool_fill(msg, devlink,
devlink_port,
devlink_sb,
pool_index,
DEVLINK_CMD_SB_PORT_POOL_NEW,
portid, seq,
NLM_F_MULTI);
if (err)
return err;
(*p_idx)++;
}
}
return 0;
}
static int devlink_nl_cmd_sb_port_pool_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink *devlink;
struct devlink_sb *devlink_sb;
int start = cb->args[0];
int idx = 0;
int err = 0;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
!devlink->ops->sb_port_pool_get)
continue;
mutex_lock(&devlink->lock);
list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
err = __sb_port_pool_get_dumpit(msg, start, &idx,
devlink, devlink_sb,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq);
if (err && err != -EOPNOTSUPP) {
mutex_unlock(&devlink->lock);
goto out;
}
}
mutex_unlock(&devlink->lock);
}
out:
mutex_unlock(&devlink_mutex);
if (err != -EMSGSIZE)
return err;
cb->args[0] = idx;
return msg->len;
}
static int devlink_sb_port_pool_set(struct devlink_port *devlink_port,
unsigned int sb_index, u16 pool_index,
u32 threshold,
struct netlink_ext_ack *extack)
{
const struct devlink_ops *ops = devlink_port->devlink->ops;
if (ops->sb_port_pool_set)
return ops->sb_port_pool_set(devlink_port, sb_index,
pool_index, threshold, extack);
return -EOPNOTSUPP;
}
static int devlink_nl_cmd_sb_port_pool_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[0];
struct devlink_sb *devlink_sb = info->user_ptr[1];
u16 pool_index;
u32 threshold;
int err;
err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
&pool_index);
if (err)
return err;
if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
return -EINVAL;
threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
return devlink_sb_port_pool_set(devlink_port, devlink_sb->index,
pool_index, threshold, info->extack);
}
static int
devlink_nl_sb_tc_pool_bind_fill(struct sk_buff *msg, struct devlink *devlink,
struct devlink_port *devlink_port,
struct devlink_sb *devlink_sb, u16 tc_index,
enum devlink_sb_pool_type pool_type,
enum devlink_command cmd,
u32 portid, u32 seq, int flags)
{
const struct devlink_ops *ops = devlink->ops;
u16 pool_index;
u32 threshold;
void *hdr;
int err;
err = ops->sb_tc_pool_bind_get(devlink_port, devlink_sb->index,
tc_index, pool_type,
&pool_index, &threshold);
if (err)
return err;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_SB_INDEX, devlink_sb->index))
goto nla_put_failure;
if (nla_put_u16(msg, DEVLINK_ATTR_SB_TC_INDEX, tc_index))
goto nla_put_failure;
if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_TYPE, pool_type))
goto nla_put_failure;
if (nla_put_u16(msg, DEVLINK_ATTR_SB_POOL_INDEX, pool_index))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_SB_THRESHOLD, threshold))
goto nla_put_failure;
if (ops->sb_occ_tc_port_bind_get) {
u32 cur;
u32 max;
err = ops->sb_occ_tc_port_bind_get(devlink_port,
devlink_sb->index,
tc_index, pool_type,
&cur, &max);
if (err && err != -EOPNOTSUPP)
return err;
if (!err) {
if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_CUR, cur))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_SB_OCC_MAX, max))
goto nla_put_failure;
}
}
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int devlink_nl_cmd_sb_tc_pool_bind_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[0];
struct devlink *devlink = devlink_port->devlink;
struct devlink_sb *devlink_sb = info->user_ptr[1];
struct sk_buff *msg;
enum devlink_sb_pool_type pool_type;
u16 tc_index;
int err;
err = devlink_sb_pool_type_get_from_info(info, &pool_type);
if (err)
return err;
err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
pool_type, &tc_index);
if (err)
return err;
if (!devlink->ops->sb_tc_pool_bind_get)
return -EOPNOTSUPP;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink, devlink_port,
devlink_sb, tc_index, pool_type,
DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
info->snd_portid,
info->snd_seq, 0);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int __sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
int start, int *p_idx,
struct devlink *devlink,
struct devlink_sb *devlink_sb,
u32 portid, u32 seq)
{
struct devlink_port *devlink_port;
u16 tc_index;
int err;
list_for_each_entry(devlink_port, &devlink->port_list, list) {
for (tc_index = 0;
tc_index < devlink_sb->ingress_tc_count; tc_index++) {
if (*p_idx < start) {
(*p_idx)++;
continue;
}
err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
devlink_port,
devlink_sb,
tc_index,
DEVLINK_SB_POOL_TYPE_INGRESS,
DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
portid, seq,
NLM_F_MULTI);
if (err)
return err;
(*p_idx)++;
}
for (tc_index = 0;
tc_index < devlink_sb->egress_tc_count; tc_index++) {
if (*p_idx < start) {
(*p_idx)++;
continue;
}
err = devlink_nl_sb_tc_pool_bind_fill(msg, devlink,
devlink_port,
devlink_sb,
tc_index,
DEVLINK_SB_POOL_TYPE_EGRESS,
DEVLINK_CMD_SB_TC_POOL_BIND_NEW,
portid, seq,
NLM_F_MULTI);
if (err)
return err;
(*p_idx)++;
}
}
return 0;
}
static int
devlink_nl_cmd_sb_tc_pool_bind_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink *devlink;
struct devlink_sb *devlink_sb;
int start = cb->args[0];
int idx = 0;
int err = 0;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)) ||
!devlink->ops->sb_tc_pool_bind_get)
continue;
mutex_lock(&devlink->lock);
list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
err = __sb_tc_pool_bind_get_dumpit(msg, start, &idx,
devlink,
devlink_sb,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq);
if (err && err != -EOPNOTSUPP) {
mutex_unlock(&devlink->lock);
goto out;
}
}
mutex_unlock(&devlink->lock);
}
out:
mutex_unlock(&devlink_mutex);
if (err != -EMSGSIZE)
return err;
cb->args[0] = idx;
return msg->len;
}
static int devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
unsigned int sb_index, u16 tc_index,
enum devlink_sb_pool_type pool_type,
u16 pool_index, u32 threshold,
struct netlink_ext_ack *extack)
{
const struct devlink_ops *ops = devlink_port->devlink->ops;
if (ops->sb_tc_pool_bind_set)
return ops->sb_tc_pool_bind_set(devlink_port, sb_index,
tc_index, pool_type,
pool_index, threshold, extack);
return -EOPNOTSUPP;
}
static int devlink_nl_cmd_sb_tc_pool_bind_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[0];
struct devlink_sb *devlink_sb = info->user_ptr[1];
enum devlink_sb_pool_type pool_type;
u16 tc_index;
u16 pool_index;
u32 threshold;
int err;
err = devlink_sb_pool_type_get_from_info(info, &pool_type);
if (err)
return err;
err = devlink_sb_tc_index_get_from_info(devlink_sb, info,
pool_type, &tc_index);
if (err)
return err;
err = devlink_sb_pool_index_get_from_info(devlink_sb, info,
&pool_index);
if (err)
return err;
if (!info->attrs[DEVLINK_ATTR_SB_THRESHOLD])
return -EINVAL;
threshold = nla_get_u32(info->attrs[DEVLINK_ATTR_SB_THRESHOLD]);
return devlink_sb_tc_pool_bind_set(devlink_port, devlink_sb->index,
tc_index, pool_type,
pool_index, threshold, info->extack);
}
static int devlink_nl_cmd_sb_occ_snapshot_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_sb *devlink_sb = info->user_ptr[1];
const struct devlink_ops *ops = devlink->ops;
if (ops->sb_occ_snapshot)
return ops->sb_occ_snapshot(devlink, devlink_sb->index);
return -EOPNOTSUPP;
}
static int devlink_nl_cmd_sb_occ_max_clear_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_sb *devlink_sb = info->user_ptr[1];
const struct devlink_ops *ops = devlink->ops;
if (ops->sb_occ_max_clear)
return ops->sb_occ_max_clear(devlink, devlink_sb->index);
return -EOPNOTSUPP;
}
static int devlink_nl_eswitch_fill(struct sk_buff *msg, struct devlink *devlink,
enum devlink_command cmd, u32 portid,
u32 seq, int flags)
{
const struct devlink_ops *ops = devlink->ops;
enum devlink_eswitch_encap_mode encap_mode;
u8 inline_mode;
void *hdr;
int err = 0;
u16 mode;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
err = devlink_nl_put_handle(msg, devlink);
if (err)
goto nla_put_failure;
if (ops->eswitch_mode_get) {
err = ops->eswitch_mode_get(devlink, &mode);
if (err)
goto nla_put_failure;
err = nla_put_u16(msg, DEVLINK_ATTR_ESWITCH_MODE, mode);
if (err)
goto nla_put_failure;
}
if (ops->eswitch_inline_mode_get) {
err = ops->eswitch_inline_mode_get(devlink, &inline_mode);
if (err)
goto nla_put_failure;
err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_INLINE_MODE,
inline_mode);
if (err)
goto nla_put_failure;
}
if (ops->eswitch_encap_mode_get) {
err = ops->eswitch_encap_mode_get(devlink, &encap_mode);
if (err)
goto nla_put_failure;
err = nla_put_u8(msg, DEVLINK_ATTR_ESWITCH_ENCAP_MODE, encap_mode);
if (err)
goto nla_put_failure;
}
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return err;
}
static int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct sk_buff *msg;
int err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_eswitch_fill(msg, devlink, DEVLINK_CMD_ESWITCH_GET,
info->snd_portid, info->snd_seq, 0);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
const struct devlink_ops *ops = devlink->ops;
enum devlink_eswitch_encap_mode encap_mode;
u8 inline_mode;
int err = 0;
u16 mode;
if (info->attrs[DEVLINK_ATTR_ESWITCH_MODE]) {
if (!ops->eswitch_mode_set)
return -EOPNOTSUPP;
mode = nla_get_u16(info->attrs[DEVLINK_ATTR_ESWITCH_MODE]);
err = ops->eswitch_mode_set(devlink, mode, info->extack);
if (err)
return err;
}
if (info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]) {
if (!ops->eswitch_inline_mode_set)
return -EOPNOTSUPP;
inline_mode = nla_get_u8(
info->attrs[DEVLINK_ATTR_ESWITCH_INLINE_MODE]);
err = ops->eswitch_inline_mode_set(devlink, inline_mode,
info->extack);
if (err)
return err;
}
if (info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]) {
if (!ops->eswitch_encap_mode_set)
return -EOPNOTSUPP;
encap_mode = nla_get_u8(info->attrs[DEVLINK_ATTR_ESWITCH_ENCAP_MODE]);
err = ops->eswitch_encap_mode_set(devlink, encap_mode,
info->extack);
if (err)
return err;
}
return 0;
}
int devlink_dpipe_match_put(struct sk_buff *skb,
struct devlink_dpipe_match *match)
{
struct devlink_dpipe_header *header = match->header;
struct devlink_dpipe_field *field = &header->fields[match->field_id];
struct nlattr *match_attr;
match_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_MATCH);
if (!match_attr)
return -EMSGSIZE;
if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_MATCH_TYPE, match->type) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, match->header_index) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
goto nla_put_failure;
nla_nest_end(skb, match_attr);
return 0;
nla_put_failure:
nla_nest_cancel(skb, match_attr);
return -EMSGSIZE;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_match_put);
static int devlink_dpipe_matches_put(struct devlink_dpipe_table *table,
struct sk_buff *skb)
{
struct nlattr *matches_attr;
matches_attr = nla_nest_start_noflag(skb,
DEVLINK_ATTR_DPIPE_TABLE_MATCHES);
if (!matches_attr)
return -EMSGSIZE;
if (table->table_ops->matches_dump(table->priv, skb))
goto nla_put_failure;
nla_nest_end(skb, matches_attr);
return 0;
nla_put_failure:
nla_nest_cancel(skb, matches_attr);
return -EMSGSIZE;
}
int devlink_dpipe_action_put(struct sk_buff *skb,
struct devlink_dpipe_action *action)
{
struct devlink_dpipe_header *header = action->header;
struct devlink_dpipe_field *field = &header->fields[action->field_id];
struct nlattr *action_attr;
action_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ACTION);
if (!action_attr)
return -EMSGSIZE;
if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_ACTION_TYPE, action->type) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_INDEX, action->header_index) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
goto nla_put_failure;
nla_nest_end(skb, action_attr);
return 0;
nla_put_failure:
nla_nest_cancel(skb, action_attr);
return -EMSGSIZE;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_action_put);
static int devlink_dpipe_actions_put(struct devlink_dpipe_table *table,
struct sk_buff *skb)
{
struct nlattr *actions_attr;
actions_attr = nla_nest_start_noflag(skb,
DEVLINK_ATTR_DPIPE_TABLE_ACTIONS);
if (!actions_attr)
return -EMSGSIZE;
if (table->table_ops->actions_dump(table->priv, skb))
goto nla_put_failure;
nla_nest_end(skb, actions_attr);
return 0;
nla_put_failure:
nla_nest_cancel(skb, actions_attr);
return -EMSGSIZE;
}
static int devlink_dpipe_table_put(struct sk_buff *skb,
struct devlink_dpipe_table *table)
{
struct nlattr *table_attr;
u64 table_size;
table_size = table->table_ops->size_get(table->priv);
table_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLE);
if (!table_attr)
return -EMSGSIZE;
if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_TABLE_NAME, table->name) ||
nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_SIZE, table_size,
DEVLINK_ATTR_PAD))
goto nla_put_failure;
if (nla_put_u8(skb, DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED,
table->counters_enabled))
goto nla_put_failure;
if (table->resource_valid) {
if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_ID,
table->resource_id, DEVLINK_ATTR_PAD) ||
nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_TABLE_RESOURCE_UNITS,
table->resource_units, DEVLINK_ATTR_PAD))
goto nla_put_failure;
}
if (devlink_dpipe_matches_put(table, skb))
goto nla_put_failure;
if (devlink_dpipe_actions_put(table, skb))
goto nla_put_failure;
nla_nest_end(skb, table_attr);
return 0;
nla_put_failure:
nla_nest_cancel(skb, table_attr);
return -EMSGSIZE;
}
static int devlink_dpipe_send_and_alloc_skb(struct sk_buff **pskb,
struct genl_info *info)
{
int err;
if (*pskb) {
err = genlmsg_reply(*pskb, info);
if (err)
return err;
}
*pskb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!*pskb)
return -ENOMEM;
return 0;
}
static int devlink_dpipe_tables_fill(struct genl_info *info,
enum devlink_command cmd, int flags,
struct list_head *dpipe_tables,
const char *table_name)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_dpipe_table *table;
struct nlattr *tables_attr;
struct sk_buff *skb = NULL;
struct nlmsghdr *nlh;
bool incomplete;
void *hdr;
int i;
int err;
table = list_first_entry(dpipe_tables,
struct devlink_dpipe_table, list);
start_again:
err = devlink_dpipe_send_and_alloc_skb(&skb, info);
if (err)
return err;
hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
&devlink_nl_family, NLM_F_MULTI, cmd);
if (!hdr) {
nlmsg_free(skb);
return -EMSGSIZE;
}
if (devlink_nl_put_handle(skb, devlink))
goto nla_put_failure;
tables_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_TABLES);
if (!tables_attr)
goto nla_put_failure;
i = 0;
incomplete = false;
list_for_each_entry_from(table, dpipe_tables, list) {
if (!table_name) {
err = devlink_dpipe_table_put(skb, table);
if (err) {
if (!i)
goto err_table_put;
incomplete = true;
break;
}
} else {
if (!strcmp(table->name, table_name)) {
err = devlink_dpipe_table_put(skb, table);
if (err)
break;
}
}
i++;
}
nla_nest_end(skb, tables_attr);
genlmsg_end(skb, hdr);
if (incomplete)
goto start_again;
send_done:
nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
NLMSG_DONE, 0, flags | NLM_F_MULTI);
if (!nlh) {
err = devlink_dpipe_send_and_alloc_skb(&skb, info);
if (err)
return err;
goto send_done;
}
return genlmsg_reply(skb, info);
nla_put_failure:
err = -EMSGSIZE;
err_table_put:
nlmsg_free(skb);
return err;
}
static int devlink_nl_cmd_dpipe_table_get(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
const char *table_name = NULL;
if (info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
return devlink_dpipe_tables_fill(info, DEVLINK_CMD_DPIPE_TABLE_GET, 0,
&devlink->dpipe_table_list,
table_name);
}
static int devlink_dpipe_value_put(struct sk_buff *skb,
struct devlink_dpipe_value *value)
{
if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE,
value->value_size, value->value))
return -EMSGSIZE;
if (value->mask)
if (nla_put(skb, DEVLINK_ATTR_DPIPE_VALUE_MASK,
value->value_size, value->mask))
return -EMSGSIZE;
if (value->mapping_valid)
if (nla_put_u32(skb, DEVLINK_ATTR_DPIPE_VALUE_MAPPING,
value->mapping_value))
return -EMSGSIZE;
return 0;
}
static int devlink_dpipe_action_value_put(struct sk_buff *skb,
struct devlink_dpipe_value *value)
{
if (!value->action)
return -EINVAL;
if (devlink_dpipe_action_put(skb, value->action))
return -EMSGSIZE;
if (devlink_dpipe_value_put(skb, value))
return -EMSGSIZE;
return 0;
}
static int devlink_dpipe_action_values_put(struct sk_buff *skb,
struct devlink_dpipe_value *values,
unsigned int values_count)
{
struct nlattr *action_attr;
int i;
int err;
for (i = 0; i < values_count; i++) {
action_attr = nla_nest_start_noflag(skb,
DEVLINK_ATTR_DPIPE_ACTION_VALUE);
if (!action_attr)
return -EMSGSIZE;
err = devlink_dpipe_action_value_put(skb, &values[i]);
if (err)
goto err_action_value_put;
nla_nest_end(skb, action_attr);
}
return 0;
err_action_value_put:
nla_nest_cancel(skb, action_attr);
return err;
}
static int devlink_dpipe_match_value_put(struct sk_buff *skb,
struct devlink_dpipe_value *value)
{
if (!value->match)
return -EINVAL;
if (devlink_dpipe_match_put(skb, value->match))
return -EMSGSIZE;
if (devlink_dpipe_value_put(skb, value))
return -EMSGSIZE;
return 0;
}
static int devlink_dpipe_match_values_put(struct sk_buff *skb,
struct devlink_dpipe_value *values,
unsigned int values_count)
{
struct nlattr *match_attr;
int i;
int err;
for (i = 0; i < values_count; i++) {
match_attr = nla_nest_start_noflag(skb,
DEVLINK_ATTR_DPIPE_MATCH_VALUE);
if (!match_attr)
return -EMSGSIZE;
err = devlink_dpipe_match_value_put(skb, &values[i]);
if (err)
goto err_match_value_put;
nla_nest_end(skb, match_attr);
}
return 0;
err_match_value_put:
nla_nest_cancel(skb, match_attr);
return err;
}
static int devlink_dpipe_entry_put(struct sk_buff *skb,
struct devlink_dpipe_entry *entry)
{
struct nlattr *entry_attr, *matches_attr, *actions_attr;
int err;
entry_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_ENTRY);
if (!entry_attr)
return -EMSGSIZE;
if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_INDEX, entry->index,
DEVLINK_ATTR_PAD))
goto nla_put_failure;
if (entry->counter_valid)
if (nla_put_u64_64bit(skb, DEVLINK_ATTR_DPIPE_ENTRY_COUNTER,
entry->counter, DEVLINK_ATTR_PAD))
goto nla_put_failure;
matches_attr = nla_nest_start_noflag(skb,
DEVLINK_ATTR_DPIPE_ENTRY_MATCH_VALUES);
if (!matches_attr)
goto nla_put_failure;
err = devlink_dpipe_match_values_put(skb, entry->match_values,
entry->match_values_count);
if (err) {
nla_nest_cancel(skb, matches_attr);
goto err_match_values_put;
}
nla_nest_end(skb, matches_attr);
actions_attr = nla_nest_start_noflag(skb,
DEVLINK_ATTR_DPIPE_ENTRY_ACTION_VALUES);
if (!actions_attr)
goto nla_put_failure;
err = devlink_dpipe_action_values_put(skb, entry->action_values,
entry->action_values_count);
if (err) {
nla_nest_cancel(skb, actions_attr);
goto err_action_values_put;
}
nla_nest_end(skb, actions_attr);
nla_nest_end(skb, entry_attr);
return 0;
nla_put_failure:
err = -EMSGSIZE;
err_match_values_put:
err_action_values_put:
nla_nest_cancel(skb, entry_attr);
return err;
}
static struct devlink_dpipe_table *
devlink_dpipe_table_find(struct list_head *dpipe_tables,
const char *table_name)
{
struct devlink_dpipe_table *table;
list_for_each_entry_rcu(table, dpipe_tables, list) {
if (!strcmp(table->name, table_name))
return table;
}
return NULL;
}
int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
{
struct devlink *devlink;
int err;
err = devlink_dpipe_send_and_alloc_skb(&dump_ctx->skb,
dump_ctx->info);
if (err)
return err;
dump_ctx->hdr = genlmsg_put(dump_ctx->skb,
dump_ctx->info->snd_portid,
dump_ctx->info->snd_seq,
&devlink_nl_family, NLM_F_MULTI,
dump_ctx->cmd);
if (!dump_ctx->hdr)
goto nla_put_failure;
devlink = dump_ctx->info->user_ptr[0];
if (devlink_nl_put_handle(dump_ctx->skb, devlink))
goto nla_put_failure;
dump_ctx->nest = nla_nest_start_noflag(dump_ctx->skb,
DEVLINK_ATTR_DPIPE_ENTRIES);
if (!dump_ctx->nest)
goto nla_put_failure;
return 0;
nla_put_failure:
nlmsg_free(dump_ctx->skb);
return -EMSGSIZE;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_prepare);
int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
struct devlink_dpipe_entry *entry)
{
return devlink_dpipe_entry_put(dump_ctx->skb, entry);
}
EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_append);
int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
{
nla_nest_end(dump_ctx->skb, dump_ctx->nest);
genlmsg_end(dump_ctx->skb, dump_ctx->hdr);
return 0;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_entry_ctx_close);
void devlink_dpipe_entry_clear(struct devlink_dpipe_entry *entry)
{
unsigned int value_count, value_index;
struct devlink_dpipe_value *value;
value = entry->action_values;
value_count = entry->action_values_count;
for (value_index = 0; value_index < value_count; value_index++) {
kfree(value[value_index].value);
kfree(value[value_index].mask);
}
value = entry->match_values;
value_count = entry->match_values_count;
for (value_index = 0; value_index < value_count; value_index++) {
kfree(value[value_index].value);
kfree(value[value_index].mask);
}
}
EXPORT_SYMBOL(devlink_dpipe_entry_clear);
static int devlink_dpipe_entries_fill(struct genl_info *info,
enum devlink_command cmd, int flags,
struct devlink_dpipe_table *table)
{
struct devlink_dpipe_dump_ctx dump_ctx;
struct nlmsghdr *nlh;
int err;
dump_ctx.skb = NULL;
dump_ctx.cmd = cmd;
dump_ctx.info = info;
err = table->table_ops->entries_dump(table->priv,
table->counters_enabled,
&dump_ctx);
if (err)
return err;
send_done:
nlh = nlmsg_put(dump_ctx.skb, info->snd_portid, info->snd_seq,
NLMSG_DONE, 0, flags | NLM_F_MULTI);
if (!nlh) {
err = devlink_dpipe_send_and_alloc_skb(&dump_ctx.skb, info);
if (err)
return err;
goto send_done;
}
return genlmsg_reply(dump_ctx.skb, info);
}
static int devlink_nl_cmd_dpipe_entries_get(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_dpipe_table *table;
const char *table_name;
if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME])
return -EINVAL;
table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
table_name);
if (!table)
return -EINVAL;
if (!table->table_ops->entries_dump)
return -EINVAL;
return devlink_dpipe_entries_fill(info, DEVLINK_CMD_DPIPE_ENTRIES_GET,
0, table);
}
static int devlink_dpipe_fields_put(struct sk_buff *skb,
const struct devlink_dpipe_header *header)
{
struct devlink_dpipe_field *field;
struct nlattr *field_attr;
int i;
for (i = 0; i < header->fields_count; i++) {
field = &header->fields[i];
field_attr = nla_nest_start_noflag(skb,
DEVLINK_ATTR_DPIPE_FIELD);
if (!field_attr)
return -EMSGSIZE;
if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_FIELD_NAME, field->name) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_ID, field->id) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_BITWIDTH, field->bitwidth) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_FIELD_MAPPING_TYPE, field->mapping_type))
goto nla_put_failure;
nla_nest_end(skb, field_attr);
}
return 0;
nla_put_failure:
nla_nest_cancel(skb, field_attr);
return -EMSGSIZE;
}
static int devlink_dpipe_header_put(struct sk_buff *skb,
struct devlink_dpipe_header *header)
{
struct nlattr *fields_attr, *header_attr;
int err;
header_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADER);
if (!header_attr)
return -EMSGSIZE;
if (nla_put_string(skb, DEVLINK_ATTR_DPIPE_HEADER_NAME, header->name) ||
nla_put_u32(skb, DEVLINK_ATTR_DPIPE_HEADER_ID, header->id) ||
nla_put_u8(skb, DEVLINK_ATTR_DPIPE_HEADER_GLOBAL, header->global))
goto nla_put_failure;
fields_attr = nla_nest_start_noflag(skb,
DEVLINK_ATTR_DPIPE_HEADER_FIELDS);
if (!fields_attr)
goto nla_put_failure;
err = devlink_dpipe_fields_put(skb, header);
if (err) {
nla_nest_cancel(skb, fields_attr);
goto nla_put_failure;
}
nla_nest_end(skb, fields_attr);
nla_nest_end(skb, header_attr);
return 0;
nla_put_failure:
err = -EMSGSIZE;
nla_nest_cancel(skb, header_attr);
return err;
}
static int devlink_dpipe_headers_fill(struct genl_info *info,
enum devlink_command cmd, int flags,
struct devlink_dpipe_headers *
dpipe_headers)
{
struct devlink *devlink = info->user_ptr[0];
struct nlattr *headers_attr;
struct sk_buff *skb = NULL;
struct nlmsghdr *nlh;
void *hdr;
int i, j;
int err;
i = 0;
start_again:
err = devlink_dpipe_send_and_alloc_skb(&skb, info);
if (err)
return err;
hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
&devlink_nl_family, NLM_F_MULTI, cmd);
if (!hdr) {
nlmsg_free(skb);
return -EMSGSIZE;
}
if (devlink_nl_put_handle(skb, devlink))
goto nla_put_failure;
headers_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_DPIPE_HEADERS);
if (!headers_attr)
goto nla_put_failure;
j = 0;
for (; i < dpipe_headers->headers_count; i++) {
err = devlink_dpipe_header_put(skb, dpipe_headers->headers[i]);
if (err) {
if (!j)
goto err_table_put;
break;
}
j++;
}
nla_nest_end(skb, headers_attr);
genlmsg_end(skb, hdr);
if (i != dpipe_headers->headers_count)
goto start_again;
send_done:
nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
NLMSG_DONE, 0, flags | NLM_F_MULTI);
if (!nlh) {
err = devlink_dpipe_send_and_alloc_skb(&skb, info);
if (err)
return err;
goto send_done;
}
return genlmsg_reply(skb, info);
nla_put_failure:
err = -EMSGSIZE;
err_table_put:
nlmsg_free(skb);
return err;
}
static int devlink_nl_cmd_dpipe_headers_get(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
if (!devlink->dpipe_headers)
return -EOPNOTSUPP;
return devlink_dpipe_headers_fill(info, DEVLINK_CMD_DPIPE_HEADERS_GET,
0, devlink->dpipe_headers);
}
static int devlink_dpipe_table_counters_set(struct devlink *devlink,
const char *table_name,
bool enable)
{
struct devlink_dpipe_table *table;
table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
table_name);
if (!table)
return -EINVAL;
if (table->counter_control_extern)
return -EOPNOTSUPP;
if (!(table->counters_enabled ^ enable))
return 0;
table->counters_enabled = enable;
if (table->table_ops->counters_set_update)
table->table_ops->counters_set_update(table->priv, enable);
return 0;
}
static int devlink_nl_cmd_dpipe_table_counters_set(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
const char *table_name;
bool counters_enable;
if (!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME] ||
!info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED])
return -EINVAL;
table_name = nla_data(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_NAME]);
counters_enable = !!nla_get_u8(info->attrs[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED]);
return devlink_dpipe_table_counters_set(devlink, table_name,
counters_enable);
}
static struct devlink_resource *
devlink_resource_find(struct devlink *devlink,
struct devlink_resource *resource, u64 resource_id)
{
struct list_head *resource_list;
if (resource)
resource_list = &resource->resource_list;
else
resource_list = &devlink->resource_list;
list_for_each_entry(resource, resource_list, list) {
struct devlink_resource *child_resource;
if (resource->id == resource_id)
return resource;
child_resource = devlink_resource_find(devlink, resource,
resource_id);
if (child_resource)
return child_resource;
}
return NULL;
}
static void
devlink_resource_validate_children(struct devlink_resource *resource)
{
struct devlink_resource *child_resource;
bool size_valid = true;
u64 parts_size = 0;
if (list_empty(&resource->resource_list))
goto out;
list_for_each_entry(child_resource, &resource->resource_list, list)
parts_size += child_resource->size_new;
if (parts_size > resource->size_new)
size_valid = false;
out:
resource->size_valid = size_valid;
}
static int
devlink_resource_validate_size(struct devlink_resource *resource, u64 size,
struct netlink_ext_ack *extack)
{
u64 reminder;
int err = 0;
if (size > resource->size_params.size_max) {
NL_SET_ERR_MSG_MOD(extack, "Size larger than maximum");
err = -EINVAL;
}
if (size < resource->size_params.size_min) {
NL_SET_ERR_MSG_MOD(extack, "Size smaller than minimum");
err = -EINVAL;
}
div64_u64_rem(size, resource->size_params.size_granularity, &reminder);
if (reminder) {
NL_SET_ERR_MSG_MOD(extack, "Wrong granularity");
err = -EINVAL;
}
return err;
}
static int devlink_nl_cmd_resource_set(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_resource *resource;
u64 resource_id;
u64 size;
int err;
if (!info->attrs[DEVLINK_ATTR_RESOURCE_ID] ||
!info->attrs[DEVLINK_ATTR_RESOURCE_SIZE])
return -EINVAL;
resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);
resource = devlink_resource_find(devlink, NULL, resource_id);
if (!resource)
return -EINVAL;
size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);
err = devlink_resource_validate_size(resource, size, info->extack);
if (err)
return err;
resource->size_new = size;
devlink_resource_validate_children(resource);
if (resource->parent)
devlink_resource_validate_children(resource->parent);
return 0;
}
static int
devlink_resource_size_params_put(struct devlink_resource *resource,
struct sk_buff *skb)
{
struct devlink_resource_size_params *size_params;
size_params = &resource->size_params;
if (nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_GRAN,
size_params->size_granularity, DEVLINK_ATTR_PAD) ||
nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MAX,
size_params->size_max, DEVLINK_ATTR_PAD) ||
nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_MIN,
size_params->size_min, DEVLINK_ATTR_PAD) ||
nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))
return -EMSGSIZE;
return 0;
}
static int devlink_resource_occ_put(struct devlink_resource *resource,
struct sk_buff *skb)
{
if (!resource->occ_get)
return 0;
return nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_OCC,
resource->occ_get(resource->occ_get_priv),
DEVLINK_ATTR_PAD);
}
static int devlink_resource_put(struct devlink *devlink, struct sk_buff *skb,
struct devlink_resource *resource)
{
struct devlink_resource *child_resource;
struct nlattr *child_resource_attr;
struct nlattr *resource_attr;
resource_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_RESOURCE);
if (!resource_attr)
return -EMSGSIZE;
if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||
nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,
DEVLINK_ATTR_PAD) ||
nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,
DEVLINK_ATTR_PAD))
goto nla_put_failure;
if (resource->size != resource->size_new)
nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE_NEW,
resource->size_new, DEVLINK_ATTR_PAD);
if (devlink_resource_occ_put(resource, skb))
goto nla_put_failure;
if (devlink_resource_size_params_put(resource, skb))
goto nla_put_failure;
if (list_empty(&resource->resource_list))
goto out;
if (nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_SIZE_VALID,
resource->size_valid))
goto nla_put_failure;
child_resource_attr = nla_nest_start_noflag(skb,
DEVLINK_ATTR_RESOURCE_LIST);
if (!child_resource_attr)
goto nla_put_failure;
list_for_each_entry(child_resource, &resource->resource_list, list) {
if (devlink_resource_put(devlink, skb, child_resource))
goto resource_put_failure;
}
nla_nest_end(skb, child_resource_attr);
out:
nla_nest_end(skb, resource_attr);
return 0;
resource_put_failure:
nla_nest_cancel(skb, child_resource_attr);
nla_put_failure:
nla_nest_cancel(skb, resource_attr);
return -EMSGSIZE;
}
static int devlink_resource_fill(struct genl_info *info,
enum devlink_command cmd, int flags)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_resource *resource;
struct nlattr *resources_attr;
struct sk_buff *skb = NULL;
struct nlmsghdr *nlh;
bool incomplete;
void *hdr;
int i;
int err;
resource = list_first_entry(&devlink->resource_list,
struct devlink_resource, list);
start_again:
err = devlink_dpipe_send_and_alloc_skb(&skb, info);
if (err)
return err;
hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
&devlink_nl_family, NLM_F_MULTI, cmd);
if (!hdr) {
nlmsg_free(skb);
return -EMSGSIZE;
}
if (devlink_nl_put_handle(skb, devlink))
goto nla_put_failure;
resources_attr = nla_nest_start_noflag(skb,
DEVLINK_ATTR_RESOURCE_LIST);
if (!resources_attr)
goto nla_put_failure;
incomplete = false;
i = 0;
list_for_each_entry_from(resource, &devlink->resource_list, list) {
err = devlink_resource_put(devlink, skb, resource);
if (err) {
if (!i)
goto err_resource_put;
incomplete = true;
break;
}
i++;
}
nla_nest_end(skb, resources_attr);
genlmsg_end(skb, hdr);
if (incomplete)
goto start_again;
send_done:
nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
NLMSG_DONE, 0, flags | NLM_F_MULTI);
if (!nlh) {
err = devlink_dpipe_send_and_alloc_skb(&skb, info);
if (err)
return err;
goto send_done;
}
return genlmsg_reply(skb, info);
nla_put_failure:
err = -EMSGSIZE;
err_resource_put:
nlmsg_free(skb);
return err;
}
static int devlink_nl_cmd_resource_dump(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
if (list_empty(&devlink->resource_list))
return -EOPNOTSUPP;
return devlink_resource_fill(info, DEVLINK_CMD_RESOURCE_DUMP, 0);
}
static int
devlink_resources_validate(struct devlink *devlink,
struct devlink_resource *resource,
struct genl_info *info)
{
struct list_head *resource_list;
int err = 0;
if (resource)
resource_list = &resource->resource_list;
else
resource_list = &devlink->resource_list;
list_for_each_entry(resource, resource_list, list) {
if (!resource->size_valid)
return -EINVAL;
err = devlink_resources_validate(devlink, resource, info);
if (err)
return err;
}
return err;
}
static struct net *devlink_netns_get(struct sk_buff *skb,
struct genl_info *info)
{
struct nlattr *netns_pid_attr = info->attrs[DEVLINK_ATTR_NETNS_PID];
struct nlattr *netns_fd_attr = info->attrs[DEVLINK_ATTR_NETNS_FD];
struct nlattr *netns_id_attr = info->attrs[DEVLINK_ATTR_NETNS_ID];
struct net *net;
if (!!netns_pid_attr + !!netns_fd_attr + !!netns_id_attr > 1) {
NL_SET_ERR_MSG(info->extack, "multiple netns identifying attributes specified");
return ERR_PTR(-EINVAL);
}
if (netns_pid_attr) {
net = get_net_ns_by_pid(nla_get_u32(netns_pid_attr));
} else if (netns_fd_attr) {
net = get_net_ns_by_fd(nla_get_u32(netns_fd_attr));
} else if (netns_id_attr) {
net = get_net_ns_by_id(sock_net(skb->sk),
nla_get_u32(netns_id_attr));
if (!net)
net = ERR_PTR(-EINVAL);
} else {
WARN_ON(1);
net = ERR_PTR(-EINVAL);
}
if (IS_ERR(net)) {
NL_SET_ERR_MSG(info->extack, "Unknown network namespace");
return ERR_PTR(-EINVAL);
}
if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
put_net(net);
return ERR_PTR(-EPERM);
}
return net;
}
static void devlink_param_notify(struct devlink *devlink,
unsigned int port_index,
struct devlink_param_item *param_item,
enum devlink_command cmd);
static void devlink_reload_netns_change(struct devlink *devlink,
struct net *dest_net)
{
struct devlink_param_item *param_item;
/* Userspace needs to be notified about devlink objects
* removed from original and entering new network namespace.
* The rest of the devlink objects are re-created during
* reload process so the notifications are generated separatelly.
*/
list_for_each_entry(param_item, &devlink->param_list, list)
devlink_param_notify(devlink, 0, param_item,
DEVLINK_CMD_PARAM_DEL);
devlink_notify(devlink, DEVLINK_CMD_DEL);
__devlink_net_set(devlink, dest_net);
devlink_notify(devlink, DEVLINK_CMD_NEW);
list_for_each_entry(param_item, &devlink->param_list, list)
devlink_param_notify(devlink, 0, param_item,
DEVLINK_CMD_PARAM_NEW);
}
static bool devlink_reload_supported(struct devlink *devlink)
{
return devlink->ops->reload_down && devlink->ops->reload_up;
}
static void devlink_reload_failed_set(struct devlink *devlink,
bool reload_failed)
{
if (devlink->reload_failed == reload_failed)
return;
devlink->reload_failed = reload_failed;
devlink_notify(devlink, DEVLINK_CMD_NEW);
}
bool devlink_is_reload_failed(const struct devlink *devlink)
{
return devlink->reload_failed;
}
EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
static int devlink_reload(struct devlink *devlink, struct net *dest_net,
struct netlink_ext_ack *extack)
{
int err;
err = devlink->ops->reload_down(devlink, !!dest_net, extack);
if (err)
return err;
if (dest_net && !net_eq(dest_net, devlink_net(devlink)))
devlink_reload_netns_change(devlink, dest_net);
err = devlink->ops->reload_up(devlink, extack);
devlink_reload_failed_set(devlink, !!err);
return err;
}
static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct net *dest_net = NULL;
int err;
if (!devlink_reload_supported(devlink))
return -EOPNOTSUPP;
err = devlink_resources_validate(devlink, NULL, info);
if (err) {
NL_SET_ERR_MSG_MOD(info->extack, "resources size validation failed");
return err;
}
if (info->attrs[DEVLINK_ATTR_NETNS_PID] ||
info->attrs[DEVLINK_ATTR_NETNS_FD] ||
info->attrs[DEVLINK_ATTR_NETNS_ID]) {
dest_net = devlink_netns_get(skb, info);
if (IS_ERR(dest_net))
return PTR_ERR(dest_net);
}
err = devlink_reload(devlink, dest_net, info->extack);
if (dest_net)
put_net(dest_net);
return err;
}
static int devlink_nl_flash_update_fill(struct sk_buff *msg,
struct devlink *devlink,
enum devlink_command cmd,
const char *status_msg,
const char *component,
unsigned long done, unsigned long total)
{
void *hdr;
hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS)
goto out;
if (status_msg &&
nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG,
status_msg))
goto nla_put_failure;
if (component &&
nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_COMPONENT,
component))
goto nla_put_failure;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE,
done, DEVLINK_ATTR_PAD))
goto nla_put_failure;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL,
total, DEVLINK_ATTR_PAD))
goto nla_put_failure;
out:
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static void __devlink_flash_update_notify(struct devlink *devlink,
enum devlink_command cmd,
const char *status_msg,
const char *component,
unsigned long done,
unsigned long total)
{
struct sk_buff *msg;
int err;
WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE &&
cmd != DEVLINK_CMD_FLASH_UPDATE_END &&
cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_flash_update_fill(msg, devlink, cmd, status_msg,
component, done, total);
if (err)
goto out_free_msg;
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
return;
out_free_msg:
nlmsg_free(msg);
}
void devlink_flash_update_begin_notify(struct devlink *devlink)
{
__devlink_flash_update_notify(devlink,
DEVLINK_CMD_FLASH_UPDATE,
NULL, NULL, 0, 0);
}
EXPORT_SYMBOL_GPL(devlink_flash_update_begin_notify);
void devlink_flash_update_end_notify(struct devlink *devlink)
{
__devlink_flash_update_notify(devlink,
DEVLINK_CMD_FLASH_UPDATE_END,
NULL, NULL, 0, 0);
}
EXPORT_SYMBOL_GPL(devlink_flash_update_end_notify);
void devlink_flash_update_status_notify(struct devlink *devlink,
const char *status_msg,
const char *component,
unsigned long done,
unsigned long total)
{
__devlink_flash_update_notify(devlink,
DEVLINK_CMD_FLASH_UPDATE_STATUS,
status_msg, component, done, total);
}
EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify);
static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
const char *file_name, *component;
struct nlattr *nla_component;
if (!devlink->ops->flash_update)
return -EOPNOTSUPP;
if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME])
return -EINVAL;
file_name = nla_data(info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]);
nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
component = nla_component ? nla_data(nla_component) : NULL;
return devlink->ops->flash_update(devlink, file_name, component,
info->extack);
}
static const struct devlink_param devlink_param_generic[] = {
{
.id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
.name = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_NAME,
.type = DEVLINK_PARAM_GENERIC_INT_ERR_RESET_TYPE,
},
{
.id = DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
.name = DEVLINK_PARAM_GENERIC_MAX_MACS_NAME,
.type = DEVLINK_PARAM_GENERIC_MAX_MACS_TYPE,
},
{
.id = DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
.name = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_NAME,
.type = DEVLINK_PARAM_GENERIC_ENABLE_SRIOV_TYPE,
},
{
.id = DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
.name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
.type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
},
{
.id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
.name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME,
.type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE,
},
{
.id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
.name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME,
.type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE,
},
{
.id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
.name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
.type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
},
{
.id = DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
.name = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_NAME,
.type = DEVLINK_PARAM_GENERIC_FW_LOAD_POLICY_TYPE,
},
{
.id = DEVLINK_PARAM_GENERIC_ID_RESET_DEV_ON_DRV_PROBE,
.name = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_NAME,
.type = DEVLINK_PARAM_GENERIC_RESET_DEV_ON_DRV_PROBE_TYPE,
},
};
static int devlink_param_generic_verify(const struct devlink_param *param)
{
/* verify it match generic parameter by id and name */
if (param->id > DEVLINK_PARAM_GENERIC_ID_MAX)
return -EINVAL;
if (strcmp(param->name, devlink_param_generic[param->id].name))
return -ENOENT;
WARN_ON(param->type != devlink_param_generic[param->id].type);
return 0;
}
static int devlink_param_driver_verify(const struct devlink_param *param)
{
int i;
if (param->id <= DEVLINK_PARAM_GENERIC_ID_MAX)
return -EINVAL;
/* verify no such name in generic params */
for (i = 0; i <= DEVLINK_PARAM_GENERIC_ID_MAX; i++)
if (!strcmp(param->name, devlink_param_generic[i].name))
return -EEXIST;
return 0;
}
static struct devlink_param_item *
devlink_param_find_by_name(struct list_head *param_list,
const char *param_name)
{
struct devlink_param_item *param_item;
list_for_each_entry(param_item, param_list, list)
if (!strcmp(param_item->param->name, param_name))
return param_item;
return NULL;
}
static struct devlink_param_item *
devlink_param_find_by_id(struct list_head *param_list, u32 param_id)
{
struct devlink_param_item *param_item;
list_for_each_entry(param_item, param_list, list)
if (param_item->param->id == param_id)
return param_item;
return NULL;
}
static bool
devlink_param_cmode_is_supported(const struct devlink_param *param,
enum devlink_param_cmode cmode)
{
return test_bit(cmode, &param->supported_cmodes);
}
static int devlink_param_get(struct devlink *devlink,
const struct devlink_param *param,
struct devlink_param_gset_ctx *ctx)
{
if (!param->get)
return -EOPNOTSUPP;
return param->get(devlink, param->id, ctx);
}
static int devlink_param_set(struct devlink *devlink,
const struct devlink_param *param,
struct devlink_param_gset_ctx *ctx)
{
if (!param->set)
return -EOPNOTSUPP;
return param->set(devlink, param->id, ctx);
}
static int
devlink_param_type_to_nla_type(enum devlink_param_type param_type)
{
switch (param_type) {
case DEVLINK_PARAM_TYPE_U8:
return NLA_U8;
case DEVLINK_PARAM_TYPE_U16:
return NLA_U16;
case DEVLINK_PARAM_TYPE_U32:
return NLA_U32;
case DEVLINK_PARAM_TYPE_STRING:
return NLA_STRING;
case DEVLINK_PARAM_TYPE_BOOL:
return NLA_FLAG;
default:
return -EINVAL;
}
}
static int
devlink_nl_param_value_fill_one(struct sk_buff *msg,
enum devlink_param_type type,
enum devlink_param_cmode cmode,
union devlink_param_value val)
{
struct nlattr *param_value_attr;
param_value_attr = nla_nest_start_noflag(msg,
DEVLINK_ATTR_PARAM_VALUE);
if (!param_value_attr)
goto nla_put_failure;
if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_CMODE, cmode))
goto value_nest_cancel;
switch (type) {
case DEVLINK_PARAM_TYPE_U8:
if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu8))
goto value_nest_cancel;
break;
case DEVLINK_PARAM_TYPE_U16:
if (nla_put_u16(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu16))
goto value_nest_cancel;
break;
case DEVLINK_PARAM_TYPE_U32:
if (nla_put_u32(msg, DEVLINK_ATTR_PARAM_VALUE_DATA, val.vu32))
goto value_nest_cancel;
break;
case DEVLINK_PARAM_TYPE_STRING:
if (nla_put_string(msg, DEVLINK_ATTR_PARAM_VALUE_DATA,
val.vstr))
goto value_nest_cancel;
break;
case DEVLINK_PARAM_TYPE_BOOL:
if (val.vbool &&
nla_put_flag(msg, DEVLINK_ATTR_PARAM_VALUE_DATA))
goto value_nest_cancel;
break;
}
nla_nest_end(msg, param_value_attr);
return 0;
value_nest_cancel:
nla_nest_cancel(msg, param_value_attr);
nla_put_failure:
return -EMSGSIZE;
}
static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
unsigned int port_index,
struct devlink_param_item *param_item,
enum devlink_command cmd,
u32 portid, u32 seq, int flags)
{
union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {};
const struct devlink_param *param = param_item->param;
struct devlink_param_gset_ctx ctx;
struct nlattr *param_values_list;
struct nlattr *param_attr;
int nla_type;
void *hdr;
int err;
int i;
/* Get value from driver part to driverinit configuration mode */
for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
if (!devlink_param_cmode_is_supported(param, i))
continue;
if (i == DEVLINK_PARAM_CMODE_DRIVERINIT) {
if (!param_item->driverinit_value_valid)
return -EOPNOTSUPP;
param_value[i] = param_item->driverinit_value;
} else {
if (!param_item->published)
continue;
ctx.cmode = i;
err = devlink_param_get(devlink, param, &ctx);
if (err)
return err;
param_value[i] = ctx.val;
}
param_value_set[i] = true;
}
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto genlmsg_cancel;
if (cmd == DEVLINK_CMD_PORT_PARAM_GET ||
cmd == DEVLINK_CMD_PORT_PARAM_NEW ||
cmd == DEVLINK_CMD_PORT_PARAM_DEL)
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, port_index))
goto genlmsg_cancel;
param_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PARAM);
if (!param_attr)
goto genlmsg_cancel;
if (nla_put_string(msg, DEVLINK_ATTR_PARAM_NAME, param->name))
goto param_nest_cancel;
if (param->generic && nla_put_flag(msg, DEVLINK_ATTR_PARAM_GENERIC))
goto param_nest_cancel;
nla_type = devlink_param_type_to_nla_type(param->type);
if (nla_type < 0)
goto param_nest_cancel;
if (nla_put_u8(msg, DEVLINK_ATTR_PARAM_TYPE, nla_type))
goto param_nest_cancel;
param_values_list = nla_nest_start_noflag(msg,
DEVLINK_ATTR_PARAM_VALUES_LIST);
if (!param_values_list)
goto param_nest_cancel;
for (i = 0; i <= DEVLINK_PARAM_CMODE_MAX; i++) {
if (!param_value_set[i])
continue;
err = devlink_nl_param_value_fill_one(msg, param->type,
i, param_value[i]);
if (err)
goto values_list_nest_cancel;
}
nla_nest_end(msg, param_values_list);
nla_nest_end(msg, param_attr);
genlmsg_end(msg, hdr);
return 0;
values_list_nest_cancel:
nla_nest_end(msg, param_values_list);
param_nest_cancel:
nla_nest_cancel(msg, param_attr);
genlmsg_cancel:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static void devlink_param_notify(struct devlink *devlink,
unsigned int port_index,
struct devlink_param_item *param_item,
enum devlink_command cmd)
{
struct sk_buff *msg;
int err;
WARN_ON(cmd != DEVLINK_CMD_PARAM_NEW && cmd != DEVLINK_CMD_PARAM_DEL &&
cmd != DEVLINK_CMD_PORT_PARAM_NEW &&
cmd != DEVLINK_CMD_PORT_PARAM_DEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
0, 0, 0);
if (err) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink_param_item *param_item;
struct devlink *devlink;
int start = cb->args[0];
int idx = 0;
int err = 0;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
continue;
mutex_lock(&devlink->lock);
list_for_each_entry(param_item, &devlink->param_list, list) {
if (idx < start) {
idx++;
continue;
}
err = devlink_nl_param_fill(msg, devlink, 0, param_item,
DEVLINK_CMD_PARAM_GET,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NLM_F_MULTI);
if (err && err != -EOPNOTSUPP) {
mutex_unlock(&devlink->lock);
goto out;
}
idx++;
}
mutex_unlock(&devlink->lock);
}
out:
mutex_unlock(&devlink_mutex);
if (err != -EMSGSIZE)
return err;
cb->args[0] = idx;
return msg->len;
}
static int
devlink_param_type_get_from_info(struct genl_info *info,
enum devlink_param_type *param_type)
{
if (!info->attrs[DEVLINK_ATTR_PARAM_TYPE])
return -EINVAL;
switch (nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_TYPE])) {
case NLA_U8:
*param_type = DEVLINK_PARAM_TYPE_U8;
break;
case NLA_U16:
*param_type = DEVLINK_PARAM_TYPE_U16;
break;
case NLA_U32:
*param_type = DEVLINK_PARAM_TYPE_U32;
break;
case NLA_STRING:
*param_type = DEVLINK_PARAM_TYPE_STRING;
break;
case NLA_FLAG:
*param_type = DEVLINK_PARAM_TYPE_BOOL;
break;
default:
return -EINVAL;
}
return 0;
}
static int
devlink_param_value_get_from_info(const struct devlink_param *param,
struct genl_info *info,
union devlink_param_value *value)
{
int len;
if (param->type != DEVLINK_PARAM_TYPE_BOOL &&
!info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA])
return -EINVAL;
switch (param->type) {
case DEVLINK_PARAM_TYPE_U8:
value->vu8 = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
break;
case DEVLINK_PARAM_TYPE_U16:
value->vu16 = nla_get_u16(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
break;
case DEVLINK_PARAM_TYPE_U32:
value->vu32 = nla_get_u32(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
break;
case DEVLINK_PARAM_TYPE_STRING:
len = strnlen(nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]),
nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
if (len == nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) ||
len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
return -EINVAL;
strcpy(value->vstr,
nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
break;
case DEVLINK_PARAM_TYPE_BOOL:
value->vbool = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA] ?
true : false;
break;
}
return 0;
}
static struct devlink_param_item *
devlink_param_get_from_info(struct list_head *param_list,
struct genl_info *info)
{
char *param_name;
if (!info->attrs[DEVLINK_ATTR_PARAM_NAME])
return NULL;
param_name = nla_data(info->attrs[DEVLINK_ATTR_PARAM_NAME]);
return devlink_param_find_by_name(param_list, param_name);
}
static int devlink_nl_cmd_param_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_param_item *param_item;
struct sk_buff *msg;
int err;
param_item = devlink_param_get_from_info(&devlink->param_list, info);
if (!param_item)
return -EINVAL;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_param_fill(msg, devlink, 0, param_item,
DEVLINK_CMD_PARAM_GET,
info->snd_portid, info->snd_seq, 0);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int __devlink_nl_cmd_param_set_doit(struct devlink *devlink,
unsigned int port_index,
struct list_head *param_list,
struct genl_info *info,
enum devlink_command cmd)
{
enum devlink_param_type param_type;
struct devlink_param_gset_ctx ctx;
enum devlink_param_cmode cmode;
struct devlink_param_item *param_item;
const struct devlink_param *param;
union devlink_param_value value;
int err = 0;
param_item = devlink_param_get_from_info(param_list, info);
if (!param_item)
return -EINVAL;
param = param_item->param;
err = devlink_param_type_get_from_info(info, &param_type);
if (err)
return err;
if (param_type != param->type)
return -EINVAL;
err = devlink_param_value_get_from_info(param, info, &value);
if (err)
return err;
if (param->validate) {
err = param->validate(devlink, param->id, value, info->extack);
if (err)
return err;
}
if (!info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE])
return -EINVAL;
cmode = nla_get_u8(info->attrs[DEVLINK_ATTR_PARAM_VALUE_CMODE]);
if (!devlink_param_cmode_is_supported(param, cmode))
return -EOPNOTSUPP;
if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
if (param->type == DEVLINK_PARAM_TYPE_STRING)
strcpy(param_item->driverinit_value.vstr, value.vstr);
else
param_item->driverinit_value = value;
param_item->driverinit_value_valid = true;
} else {
if (!param->set)
return -EOPNOTSUPP;
ctx.val = value;
ctx.cmode = cmode;
err = devlink_param_set(devlink, param, &ctx);
if (err)
return err;
}
devlink_param_notify(devlink, port_index, param_item, cmd);
return 0;
}
static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
return __devlink_nl_cmd_param_set_doit(devlink, 0, &devlink->param_list,
info, DEVLINK_CMD_PARAM_NEW);
}
static int devlink_param_register_one(struct devlink *devlink,
unsigned int port_index,
struct list_head *param_list,
const struct devlink_param *param,
enum devlink_command cmd)
{
struct devlink_param_item *param_item;
if (devlink_param_find_by_name(param_list, param->name))
return -EEXIST;
if (param->supported_cmodes == BIT(DEVLINK_PARAM_CMODE_DRIVERINIT))
WARN_ON(param->get || param->set);
else
WARN_ON(!param->get || !param->set);
param_item = kzalloc(sizeof(*param_item), GFP_KERNEL);
if (!param_item)
return -ENOMEM;
param_item->param = param;
list_add_tail(&param_item->list, param_list);
devlink_param_notify(devlink, port_index, param_item, cmd);
return 0;
}
static void devlink_param_unregister_one(struct devlink *devlink,
unsigned int port_index,
struct list_head *param_list,
const struct devlink_param *param,
enum devlink_command cmd)
{
struct devlink_param_item *param_item;
param_item = devlink_param_find_by_name(param_list, param->name);
WARN_ON(!param_item);
devlink_param_notify(devlink, port_index, param_item, cmd);
list_del(&param_item->list);
kfree(param_item);
}
static int devlink_nl_cmd_port_param_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink_param_item *param_item;
struct devlink_port *devlink_port;
struct devlink *devlink;
int start = cb->args[0];
int idx = 0;
int err = 0;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
continue;
mutex_lock(&devlink->lock);
list_for_each_entry(devlink_port, &devlink->port_list, list) {
list_for_each_entry(param_item,
&devlink_port->param_list, list) {
if (idx < start) {
idx++;
continue;
}
err = devlink_nl_param_fill(msg,
devlink_port->devlink,
devlink_port->index, param_item,
DEVLINK_CMD_PORT_PARAM_GET,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NLM_F_MULTI);
if (err && err != -EOPNOTSUPP) {
mutex_unlock(&devlink->lock);
goto out;
}
idx++;
}
}
mutex_unlock(&devlink->lock);
}
out:
mutex_unlock(&devlink_mutex);
if (err != -EMSGSIZE)
return err;
cb->args[0] = idx;
return msg->len;
}
static int devlink_nl_cmd_port_param_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[0];
struct devlink_param_item *param_item;
struct sk_buff *msg;
int err;
param_item = devlink_param_get_from_info(&devlink_port->param_list,
info);
if (!param_item)
return -EINVAL;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_param_fill(msg, devlink_port->devlink,
devlink_port->index, param_item,
DEVLINK_CMD_PORT_PARAM_GET,
info->snd_portid, info->snd_seq, 0);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int devlink_nl_cmd_port_param_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[0];
return __devlink_nl_cmd_param_set_doit(devlink_port->devlink,
devlink_port->index,
&devlink_port->param_list, info,
DEVLINK_CMD_PORT_PARAM_NEW);
}
static int devlink_nl_region_snapshot_id_put(struct sk_buff *msg,
struct devlink *devlink,
struct devlink_snapshot *snapshot)
{
struct nlattr *snap_attr;
int err;
snap_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_SNAPSHOT);
if (!snap_attr)
return -EINVAL;
err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID, snapshot->id);
if (err)
goto nla_put_failure;
nla_nest_end(msg, snap_attr);
return 0;
nla_put_failure:
nla_nest_cancel(msg, snap_attr);
return err;
}
static int devlink_nl_region_snapshots_id_put(struct sk_buff *msg,
struct devlink *devlink,
struct devlink_region *region)
{
struct devlink_snapshot *snapshot;
struct nlattr *snapshots_attr;
int err;
snapshots_attr = nla_nest_start_noflag(msg,
DEVLINK_ATTR_REGION_SNAPSHOTS);
if (!snapshots_attr)
return -EINVAL;
list_for_each_entry(snapshot, &region->snapshot_list, list) {
err = devlink_nl_region_snapshot_id_put(msg, devlink, snapshot);
if (err)
goto nla_put_failure;
}
nla_nest_end(msg, snapshots_attr);
return 0;
nla_put_failure:
nla_nest_cancel(msg, snapshots_attr);
return err;
}
static int devlink_nl_region_fill(struct sk_buff *msg, struct devlink *devlink,
enum devlink_command cmd, u32 portid,
u32 seq, int flags,
struct devlink_region *region)
{
void *hdr;
int err;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
err = devlink_nl_put_handle(msg, devlink);
if (err)
goto nla_put_failure;
err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->name);
if (err)
goto nla_put_failure;
err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
region->size,
DEVLINK_ATTR_PAD);
if (err)
goto nla_put_failure;
err = devlink_nl_region_snapshots_id_put(msg, devlink, region);
if (err)
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return err;
}
static void devlink_nl_region_notify(struct devlink_region *region,
struct devlink_snapshot *snapshot,
enum devlink_command cmd)
{
struct devlink *devlink = region->devlink;
struct sk_buff *msg;
void *hdr;
int err;
WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
hdr = genlmsg_put(msg, 0, 0, &devlink_nl_family, 0, cmd);
if (!hdr)
goto out_free_msg;
err = devlink_nl_put_handle(msg, devlink);
if (err)
goto out_cancel_msg;
err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
region->name);
if (err)
goto out_cancel_msg;
if (snapshot) {
err = nla_put_u32(msg, DEVLINK_ATTR_REGION_SNAPSHOT_ID,
snapshot->id);
if (err)
goto out_cancel_msg;
} else {
err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_SIZE,
region->size, DEVLINK_ATTR_PAD);
if (err)
goto out_cancel_msg;
}
genlmsg_end(msg, hdr);
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
return;
out_cancel_msg:
genlmsg_cancel(msg, hdr);
out_free_msg:
nlmsg_free(msg);
}
static void devlink_region_snapshot_del(struct devlink_region *region,
struct devlink_snapshot *snapshot)
{
devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
region->cur_snapshots--;
list_del(&snapshot->list);
(*snapshot->data_destructor)(snapshot->data);
kfree(snapshot);
}
static int devlink_nl_cmd_region_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_region *region;
const char *region_name;
struct sk_buff *msg;
int err;
if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
return -EINVAL;
region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
region = devlink_region_get_by_name(devlink, region_name);
if (!region)
return -EINVAL;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_region_fill(msg, devlink, DEVLINK_CMD_REGION_GET,
info->snd_portid, info->snd_seq, 0,
region);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int devlink_nl_cmd_region_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink_region *region;
struct devlink *devlink;
int start = cb->args[0];
int idx = 0;
int err;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
continue;
mutex_lock(&devlink->lock);
list_for_each_entry(region, &devlink->region_list, list) {
if (idx < start) {
idx++;
continue;
}
err = devlink_nl_region_fill(msg, devlink,
DEVLINK_CMD_REGION_GET,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NLM_F_MULTI, region);
if (err) {
mutex_unlock(&devlink->lock);
goto out;
}
idx++;
}
mutex_unlock(&devlink->lock);
}
out:
mutex_unlock(&devlink_mutex);
cb->args[0] = idx;
return msg->len;
}
static int devlink_nl_cmd_region_del(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_snapshot *snapshot;
struct devlink_region *region;
const char *region_name;
u32 snapshot_id;
if (!info->attrs[DEVLINK_ATTR_REGION_NAME] ||
!info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID])
return -EINVAL;
region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
snapshot_id = nla_get_u32(info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
region = devlink_region_get_by_name(devlink, region_name);
if (!region)
return -EINVAL;
snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
if (!snapshot)
return -EINVAL;
devlink_region_snapshot_del(region, snapshot);
return 0;
}
static int devlink_nl_cmd_region_read_chunk_fill(struct sk_buff *msg,
struct devlink *devlink,
u8 *chunk, u32 chunk_size,
u64 addr)
{
struct nlattr *chunk_attr;
int err;
chunk_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_REGION_CHUNK);
if (!chunk_attr)
return -EINVAL;
err = nla_put(msg, DEVLINK_ATTR_REGION_CHUNK_DATA, chunk_size, chunk);
if (err)
goto nla_put_failure;
err = nla_put_u64_64bit(msg, DEVLINK_ATTR_REGION_CHUNK_ADDR, addr,
DEVLINK_ATTR_PAD);
if (err)
goto nla_put_failure;
nla_nest_end(msg, chunk_attr);
return 0;
nla_put_failure:
nla_nest_cancel(msg, chunk_attr);
return err;
}
#define DEVLINK_REGION_READ_CHUNK_SIZE 256
static int devlink_nl_region_read_snapshot_fill(struct sk_buff *skb,
struct devlink *devlink,
struct devlink_region *region,
struct nlattr **attrs,
u64 start_offset,
u64 end_offset,
bool dump,
u64 *new_offset)
{
struct devlink_snapshot *snapshot;
u64 curr_offset = start_offset;
u32 snapshot_id;
int err = 0;
*new_offset = start_offset;
snapshot_id = nla_get_u32(attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]);
snapshot = devlink_region_snapshot_get_by_id(region, snapshot_id);
if (!snapshot)
return -EINVAL;
if (end_offset > region->size || dump)
end_offset = region->size;
while (curr_offset < end_offset) {
u32 data_size;
u8 *data;
if (end_offset - curr_offset < DEVLINK_REGION_READ_CHUNK_SIZE)
data_size = end_offset - curr_offset;
else
data_size = DEVLINK_REGION_READ_CHUNK_SIZE;
data = &snapshot->data[curr_offset];
err = devlink_nl_cmd_region_read_chunk_fill(skb, devlink,
data, data_size,
curr_offset);
if (err)
break;
curr_offset += data_size;
}
*new_offset = curr_offset;
return err;
}
static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb,
struct netlink_callback *cb)
{
const struct genl_dumpit_info *info = genl_dumpit_info(cb);
u64 ret_offset, start_offset, end_offset = 0;
struct nlattr **attrs = info->attrs;
struct devlink_region *region;
struct nlattr *chunks_attr;
const char *region_name;
struct devlink *devlink;
bool dump = true;
void *hdr;
int err;
start_offset = *((u64 *)&cb->args[0]);
mutex_lock(&devlink_mutex);
devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
if (IS_ERR(devlink)) {
err = PTR_ERR(devlink);
goto out_dev;
}
mutex_lock(&devlink->lock);
if (!attrs[DEVLINK_ATTR_REGION_NAME] ||
!attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) {
err = -EINVAL;
goto out_unlock;
}
region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
region = devlink_region_get_by_name(devlink, region_name);
if (!region) {
err = -EINVAL;
goto out_unlock;
}
hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
&devlink_nl_family, NLM_F_ACK | NLM_F_MULTI,
DEVLINK_CMD_REGION_READ);
if (!hdr) {
err = -EMSGSIZE;
goto out_unlock;
}
err = devlink_nl_put_handle(skb, devlink);
if (err)
goto nla_put_failure;
err = nla_put_string(skb, DEVLINK_ATTR_REGION_NAME, region_name);
if (err)
goto nla_put_failure;
chunks_attr = nla_nest_start_noflag(skb, DEVLINK_ATTR_REGION_CHUNKS);
if (!chunks_attr) {
err = -EMSGSIZE;
goto nla_put_failure;
}
if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] &&
attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
if (!start_offset)
start_offset =
nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
end_offset = nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR]);
end_offset += nla_get_u64(attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]);
dump = false;
}
err = devlink_nl_region_read_snapshot_fill(skb, devlink,
region, attrs,
start_offset,
end_offset, dump,
&ret_offset);
if (err && err != -EMSGSIZE)
goto nla_put_failure;
/* Check if there was any progress done to prevent infinite loop */
if (ret_offset == start_offset) {
err = -EINVAL;
goto nla_put_failure;
}
*((u64 *)&cb->args[0]) = ret_offset;
nla_nest_end(skb, chunks_attr);
genlmsg_end(skb, hdr);
mutex_unlock(&devlink->lock);
mutex_unlock(&devlink_mutex);
return skb->len;
nla_put_failure:
genlmsg_cancel(skb, hdr);
out_unlock:
mutex_unlock(&devlink->lock);
out_dev:
mutex_unlock(&devlink_mutex);
return err;
}
struct devlink_info_req {
struct sk_buff *msg;
};
int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name)
{
return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name);
}
EXPORT_SYMBOL_GPL(devlink_info_driver_name_put);
int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn)
{
return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn);
}
EXPORT_SYMBOL_GPL(devlink_info_serial_number_put);
static int devlink_info_version_put(struct devlink_info_req *req, int attr,
const char *version_name,
const char *version_value)
{
struct nlattr *nest;
int err;
nest = nla_nest_start_noflag(req->msg, attr);
if (!nest)
return -EMSGSIZE;
err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_NAME,
version_name);
if (err)
goto nla_put_failure;
err = nla_put_string(req->msg, DEVLINK_ATTR_INFO_VERSION_VALUE,
version_value);
if (err)
goto nla_put_failure;
nla_nest_end(req->msg, nest);
return 0;
nla_put_failure:
nla_nest_cancel(req->msg, nest);
return err;
}
int devlink_info_version_fixed_put(struct devlink_info_req *req,
const char *version_name,
const char *version_value)
{
return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_FIXED,
version_name, version_value);
}
EXPORT_SYMBOL_GPL(devlink_info_version_fixed_put);
int devlink_info_version_stored_put(struct devlink_info_req *req,
const char *version_name,
const char *version_value)
{
return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
version_name, version_value);
}
EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
int devlink_info_version_running_put(struct devlink_info_req *req,
const char *version_name,
const char *version_value)
{
return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
version_name, version_value);
}
EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
static int
devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink,
enum devlink_command cmd, u32 portid,
u32 seq, int flags, struct netlink_ext_ack *extack)
{
struct devlink_info_req req;
void *hdr;
int err;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
err = -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto err_cancel_msg;
req.msg = msg;
err = devlink->ops->info_get(devlink, &req, extack);
if (err)
goto err_cancel_msg;
genlmsg_end(msg, hdr);
return 0;
err_cancel_msg:
genlmsg_cancel(msg, hdr);
return err;
}
static int devlink_nl_cmd_info_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct sk_buff *msg;
int err;
if (!devlink->ops->info_get)
return -EOPNOTSUPP;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
info->snd_portid, info->snd_seq, 0,
info->extack);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int devlink_nl_cmd_info_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink *devlink;
int start = cb->args[0];
int idx = 0;
int err = 0;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
continue;
if (idx < start) {
idx++;
continue;
}
if (!devlink->ops->info_get) {
idx++;
continue;
}
mutex_lock(&devlink->lock);
err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI,
cb->extack);
mutex_unlock(&devlink->lock);
if (err && err != -EOPNOTSUPP)
break;
idx++;
}
mutex_unlock(&devlink_mutex);
if (err != -EMSGSIZE)
return err;
cb->args[0] = idx;
return msg->len;
}
struct devlink_fmsg_item {
struct list_head list;
int attrtype;
u8 nla_type;
u16 len;
int value[0];
};
struct devlink_fmsg {
struct list_head item_list;
};
static struct devlink_fmsg *devlink_fmsg_alloc(void)
{
struct devlink_fmsg *fmsg;
fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
if (!fmsg)
return NULL;
INIT_LIST_HEAD(&fmsg->item_list);
return fmsg;
}
static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
{
struct devlink_fmsg_item *item, *tmp;
list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
list_del(&item->list);
kfree(item);
}
kfree(fmsg);
}
static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
int attrtype)
{
struct devlink_fmsg_item *item;
item = kzalloc(sizeof(*item), GFP_KERNEL);
if (!item)
return -ENOMEM;
item->attrtype = attrtype;
list_add_tail(&item->list, &fmsg->item_list);
return 0;
}
int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
{
return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
{
return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
}
int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
{
return devlink_fmsg_nest_end(fmsg);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
#define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
{
struct devlink_fmsg_item *item;
if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
return -EMSGSIZE;
item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
if (!item)
return -ENOMEM;
item->nla_type = NLA_NUL_STRING;
item->len = strlen(name) + 1;
item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
memcpy(&item->value, name, item->len);
list_add_tail(&item->list, &fmsg->item_list);
return 0;
}
int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
{
int err;
err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
if (err)
return err;
err = devlink_fmsg_put_name(fmsg, name);
if (err)
return err;
return 0;
}
EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
{
return devlink_fmsg_nest_end(fmsg);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
const char *name)
{
int err;
err = devlink_fmsg_pair_nest_start(fmsg, name);
if (err)
return err;
err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
if (err)
return err;
return 0;
}
EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
{
int err;
err = devlink_fmsg_nest_end(fmsg);
if (err)
return err;
err = devlink_fmsg_nest_end(fmsg);
if (err)
return err;
return 0;
}
EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
const void *value, u16 value_len,
u8 value_nla_type)
{
struct devlink_fmsg_item *item;
if (value_len > DEVLINK_FMSG_MAX_SIZE)
return -EMSGSIZE;
item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
if (!item)
return -ENOMEM;
item->nla_type = value_nla_type;
item->len = value_len;
item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
memcpy(&item->value, value, item->len);
list_add_tail(&item->list, &fmsg->item_list);
return 0;
}
int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
{
return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_bool_put);
int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
{
return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_u8_put);
int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
{
return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
{
return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_u64_put);
int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
{
return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
NLA_NUL_STRING);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
u16 value_len)
{
return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
bool value)
{
int err;
err = devlink_fmsg_pair_nest_start(fmsg, name);
if (err)
return err;
err = devlink_fmsg_bool_put(fmsg, value);
if (err)
return err;
err = devlink_fmsg_pair_nest_end(fmsg);
if (err)
return err;
return 0;
}
EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
u8 value)
{
int err;
err = devlink_fmsg_pair_nest_start(fmsg, name);
if (err)
return err;
err = devlink_fmsg_u8_put(fmsg, value);
if (err)
return err;
err = devlink_fmsg_pair_nest_end(fmsg);
if (err)
return err;
return 0;
}
EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
u32 value)
{
int err;
err = devlink_fmsg_pair_nest_start(fmsg, name);
if (err)
return err;
err = devlink_fmsg_u32_put(fmsg, value);
if (err)
return err;
err = devlink_fmsg_pair_nest_end(fmsg);
if (err)
return err;
return 0;
}
EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
u64 value)
{
int err;
err = devlink_fmsg_pair_nest_start(fmsg, name);
if (err)
return err;
err = devlink_fmsg_u64_put(fmsg, value);
if (err)
return err;
err = devlink_fmsg_pair_nest_end(fmsg);
if (err)
return err;
return 0;
}
EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
const char *value)
{
int err;
err = devlink_fmsg_pair_nest_start(fmsg, name);
if (err)
return err;
err = devlink_fmsg_string_put(fmsg, value);
if (err)
return err;
err = devlink_fmsg_pair_nest_end(fmsg);
if (err)
return err;
return 0;
}
EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
const void *value, u16 value_len)
{
int err;
err = devlink_fmsg_pair_nest_start(fmsg, name);
if (err)
return err;
err = devlink_fmsg_binary_put(fmsg, value, value_len);
if (err)
return err;
err = devlink_fmsg_pair_nest_end(fmsg);
if (err)
return err;
return 0;
}
EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
static int
devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
{
switch (msg->nla_type) {
case NLA_FLAG:
case NLA_U8:
case NLA_U32:
case NLA_U64:
case NLA_NUL_STRING:
case NLA_BINARY:
return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
msg->nla_type);
default:
return -EINVAL;
}
}
static int
devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
{
int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
u8 tmp;
switch (msg->nla_type) {
case NLA_FLAG:
/* Always provide flag data, regardless of its value */
tmp = *(bool *) msg->value;
return nla_put_u8(skb, attrtype, tmp);
case NLA_U8:
return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
case NLA_U32:
return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
case NLA_U64:
return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
DEVLINK_ATTR_PAD);
case NLA_NUL_STRING:
return nla_put_string(skb, attrtype, (char *) &msg->value);
case NLA_BINARY:
return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
default:
return -EINVAL;
}
}
static int
devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
int *start)
{
struct devlink_fmsg_item *item;
struct nlattr *fmsg_nlattr;
int i = 0;
int err;
fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
if (!fmsg_nlattr)
return -EMSGSIZE;
list_for_each_entry(item, &fmsg->item_list, list) {
if (i < *start) {
i++;
continue;
}
switch (item->attrtype) {
case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
case DEVLINK_ATTR_FMSG_ARR_NEST_START:
case DEVLINK_ATTR_FMSG_NEST_END:
err = nla_put_flag(skb, item->attrtype);
break;
case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
err = devlink_fmsg_item_fill_type(item, skb);
if (err)
break;
err = devlink_fmsg_item_fill_data(item, skb);
break;
case DEVLINK_ATTR_FMSG_OBJ_NAME:
err = nla_put_string(skb, item->attrtype,
(char *) &item->value);
break;
default:
err = -EINVAL;
break;
}
if (!err)
*start = ++i;
else
break;
}
nla_nest_end(skb, fmsg_nlattr);
return err;
}
static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
struct genl_info *info,
enum devlink_command cmd, int flags)
{
struct nlmsghdr *nlh;
struct sk_buff *skb;
bool last = false;
int index = 0;
void *hdr;
int err;
while (!last) {
int tmp_index = index;
skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!skb)
return -ENOMEM;
hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
&devlink_nl_family, flags | NLM_F_MULTI, cmd);
if (!hdr) {
err = -EMSGSIZE;
goto nla_put_failure;
}
err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
if (!err)
last = true;
else if (err != -EMSGSIZE || tmp_index == index)
goto nla_put_failure;
genlmsg_end(skb, hdr);
err = genlmsg_reply(skb, info);
if (err)
return err;
}
skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!skb)
return -ENOMEM;
nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
NLMSG_DONE, 0, flags | NLM_F_MULTI);
if (!nlh) {
err = -EMSGSIZE;
goto nla_put_failure;
}
return genlmsg_reply(skb, info);
nla_put_failure:
nlmsg_free(skb);
return err;
}
static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
struct netlink_callback *cb,
enum devlink_command cmd)
{
int index = cb->args[0];
int tmp_index = index;
void *hdr;
int err;
hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
&devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
if (!hdr) {
err = -EMSGSIZE;
goto nla_put_failure;
}
err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
if ((err && err != -EMSGSIZE) || tmp_index == index)
goto nla_put_failure;
cb->args[0] = index;
genlmsg_end(skb, hdr);
return skb->len;
nla_put_failure:
genlmsg_cancel(skb, hdr);
return err;
}
struct devlink_health_reporter {
struct list_head list;
void *priv;
const struct devlink_health_reporter_ops *ops;
struct devlink *devlink;
struct devlink_fmsg *dump_fmsg;
struct mutex dump_lock; /* lock parallel read/write from dump buffers */
u64 graceful_period;
bool auto_recover;
u8 health_state;
u64 dump_ts;
u64 error_count;
u64 recovery_count;
u64 last_recovery_ts;
refcount_t refcount;
};
void *
devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
{
return reporter->priv;
}
EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
static struct devlink_health_reporter *
devlink_health_reporter_find_by_name(struct devlink *devlink,
const char *reporter_name)
{
struct devlink_health_reporter *reporter;
lockdep_assert_held(&devlink->reporters_lock);
list_for_each_entry(reporter, &devlink->reporter_list, list)
if (!strcmp(reporter->ops->name, reporter_name))
return reporter;
return NULL;
}
/**
* devlink_health_reporter_create - create devlink health reporter
*
* @devlink: devlink
* @ops: ops
* @graceful_period: to avoid recovery loops, in msecs
* @auto_recover: auto recover when error occurs
* @priv: priv
*/
struct devlink_health_reporter *
devlink_health_reporter_create(struct devlink *devlink,
const struct devlink_health_reporter_ops *ops,
u64 graceful_period, bool auto_recover,
void *priv)
{
struct devlink_health_reporter *reporter;
mutex_lock(&devlink->reporters_lock);
if (devlink_health_reporter_find_by_name(devlink, ops->name)) {
reporter = ERR_PTR(-EEXIST);
goto unlock;
}
if (WARN_ON(auto_recover && !ops->recover) ||
WARN_ON(graceful_period && !ops->recover)) {
reporter = ERR_PTR(-EINVAL);
goto unlock;
}
reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
if (!reporter) {
reporter = ERR_PTR(-ENOMEM);
goto unlock;
}
reporter->priv = priv;
reporter->ops = ops;
reporter->devlink = devlink;
reporter->graceful_period = graceful_period;
reporter->auto_recover = auto_recover;
mutex_init(&reporter->dump_lock);
refcount_set(&reporter->refcount, 1);
list_add_tail(&reporter->list, &devlink->reporter_list);
unlock:
mutex_unlock(&devlink->reporters_lock);
return reporter;
}
EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
/**
* devlink_health_reporter_destroy - destroy devlink health reporter
*
* @reporter: devlink health reporter to destroy
*/
void
devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
{
mutex_lock(&reporter->devlink->reporters_lock);
list_del(&reporter->list);
mutex_unlock(&reporter->devlink->reporters_lock);
while (refcount_read(&reporter->refcount) > 1)
msleep(100);
mutex_destroy(&reporter->dump_lock);
if (reporter->dump_fmsg)
devlink_fmsg_free(reporter->dump_fmsg);
kfree(reporter);
}
EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
void
devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
enum devlink_health_reporter_state state)
{
if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
return;
if (reporter->health_state == state)
return;
reporter->health_state = state;
trace_devlink_health_reporter_state_update(reporter->devlink,
reporter->ops->name, state);
}
EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
static int
devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
void *priv_ctx, struct netlink_ext_ack *extack)
{
int err;
if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
return 0;
if (!reporter->ops->recover)
return -EOPNOTSUPP;
err = reporter->ops->recover(reporter, priv_ctx, extack);
if (err)
return err;
reporter->recovery_count++;
reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
reporter->last_recovery_ts = jiffies;
return 0;
}
static void
devlink_health_dump_clear(struct devlink_health_reporter *reporter)
{
if (!reporter->dump_fmsg)
return;
devlink_fmsg_free(reporter->dump_fmsg);
reporter->dump_fmsg = NULL;
}
static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
void *priv_ctx,
struct netlink_ext_ack *extack)
{
int err;
if (!reporter->ops->dump)
return 0;
if (reporter->dump_fmsg)
return 0;
reporter->dump_fmsg = devlink_fmsg_alloc();
if (!reporter->dump_fmsg) {
err = -ENOMEM;
return err;
}
err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
if (err)
goto dump_err;
err = reporter->ops->dump(reporter, reporter->dump_fmsg,
priv_ctx, extack);
if (err)
goto dump_err;
err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
if (err)
goto dump_err;
reporter->dump_ts = jiffies;
return 0;
dump_err:
devlink_health_dump_clear(reporter);
return err;
}
int devlink_health_report(struct devlink_health_reporter *reporter,
const char *msg, void *priv_ctx)
{
enum devlink_health_reporter_state prev_health_state;
struct devlink *devlink = reporter->devlink;
/* write a log message of the current error */
WARN_ON(!msg);
trace_devlink_health_report(devlink, reporter->ops->name, msg);
reporter->error_count++;
prev_health_state = reporter->health_state;
reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
/* abort if the previous error wasn't recovered */
if (reporter->auto_recover &&
(prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
jiffies - reporter->last_recovery_ts <
msecs_to_jiffies(reporter->graceful_period))) {
trace_devlink_health_recover_aborted(devlink,
reporter->ops->name,
reporter->health_state,
jiffies -
reporter->last_recovery_ts);
return -ECANCELED;
}
reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
mutex_lock(&reporter->dump_lock);
/* store current dump of current error, for later analysis */
devlink_health_do_dump(reporter, priv_ctx, NULL);
mutex_unlock(&reporter->dump_lock);
if (reporter->auto_recover)
return devlink_health_reporter_recover(reporter,
priv_ctx, NULL);
return 0;
}
EXPORT_SYMBOL_GPL(devlink_health_report);
static struct devlink_health_reporter *
devlink_health_reporter_get_from_attrs(struct devlink *devlink,
struct nlattr **attrs)
{
struct devlink_health_reporter *reporter;
char *reporter_name;
if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
return NULL;
reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
mutex_lock(&devlink->reporters_lock);
reporter = devlink_health_reporter_find_by_name(devlink, reporter_name);
if (reporter)
refcount_inc(&reporter->refcount);
mutex_unlock(&devlink->reporters_lock);
return reporter;
}
static struct devlink_health_reporter *
devlink_health_reporter_get_from_info(struct devlink *devlink,
struct genl_info *info)
{
return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
}
static struct devlink_health_reporter *
devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
{
const struct genl_dumpit_info *info = genl_dumpit_info(cb);
struct devlink_health_reporter *reporter;
struct nlattr **attrs = info->attrs;
struct devlink *devlink;
mutex_lock(&devlink_mutex);
devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs);
if (IS_ERR(devlink))
goto unlock;
reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
mutex_unlock(&devlink_mutex);
return reporter;
unlock:
mutex_unlock(&devlink_mutex);
return NULL;
}
static void
devlink_health_reporter_put(struct devlink_health_reporter *reporter)
{
refcount_dec(&reporter->refcount);
}
static int
devlink_nl_health_reporter_fill(struct sk_buff *msg,
struct devlink *devlink,
struct devlink_health_reporter *reporter,
enum devlink_command cmd, u32 portid,
u32 seq, int flags)
{
struct nlattr *reporter_attr;
void *hdr;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto genlmsg_cancel;
reporter_attr = nla_nest_start_noflag(msg,
DEVLINK_ATTR_HEALTH_REPORTER);
if (!reporter_attr)
goto genlmsg_cancel;
if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
reporter->ops->name))
goto reporter_nest_cancel;
if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
reporter->health_state))
goto reporter_nest_cancel;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
reporter->error_count, DEVLINK_ATTR_PAD))
goto reporter_nest_cancel;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
reporter->recovery_count, DEVLINK_ATTR_PAD))
goto reporter_nest_cancel;
if (reporter->ops->recover &&
nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
reporter->graceful_period,
DEVLINK_ATTR_PAD))
goto reporter_nest_cancel;
if (reporter->ops->recover &&
nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
reporter->auto_recover))
goto reporter_nest_cancel;
if (reporter->dump_fmsg &&
nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
jiffies_to_msecs(reporter->dump_ts),
DEVLINK_ATTR_PAD))
goto reporter_nest_cancel;
nla_nest_end(msg, reporter_attr);
genlmsg_end(msg, hdr);
return 0;
reporter_nest_cancel:
nla_nest_end(msg, reporter_attr);
genlmsg_cancel:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_health_reporter *reporter;
struct sk_buff *msg;
int err;
reporter = devlink_health_reporter_get_from_info(devlink, info);
if (!reporter)
return -EINVAL;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
err = -ENOMEM;
goto out;
}
err = devlink_nl_health_reporter_fill(msg, devlink, reporter,
DEVLINK_CMD_HEALTH_REPORTER_GET,
info->snd_portid, info->snd_seq,
0);
if (err) {
nlmsg_free(msg);
goto out;
}
err = genlmsg_reply(msg, info);
out:
devlink_health_reporter_put(reporter);
return err;
}
static int
devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink_health_reporter *reporter;
struct devlink *devlink;
int start = cb->args[0];
int idx = 0;
int err;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
continue;
mutex_lock(&devlink->reporters_lock);
list_for_each_entry(reporter, &devlink->reporter_list,
list) {
if (idx < start) {
idx++;
continue;
}
err = devlink_nl_health_reporter_fill(msg, devlink,
reporter,
DEVLINK_CMD_HEALTH_REPORTER_GET,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NLM_F_MULTI);
if (err) {
mutex_unlock(&devlink->reporters_lock);
goto out;
}
idx++;
}
mutex_unlock(&devlink->reporters_lock);
}
out:
mutex_unlock(&devlink_mutex);
cb->args[0] = idx;
return msg->len;
}
static int
devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_health_reporter *reporter;
int err;
reporter = devlink_health_reporter_get_from_info(devlink, info);
if (!reporter)
return -EINVAL;
if (!reporter->ops->recover &&
(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])) {
err = -EOPNOTSUPP;
goto out;
}
if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
reporter->graceful_period =
nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
reporter->auto_recover =
nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
devlink_health_reporter_put(reporter);
return 0;
out:
devlink_health_reporter_put(reporter);
return err;
}
static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_health_reporter *reporter;
int err;
reporter = devlink_health_reporter_get_from_info(devlink, info);
if (!reporter)
return -EINVAL;
err = devlink_health_reporter_recover(reporter, NULL, info->extack);
devlink_health_reporter_put(reporter);
return err;
}
static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_health_reporter *reporter;
struct devlink_fmsg *fmsg;
int err;
reporter = devlink_health_reporter_get_from_info(devlink, info);
if (!reporter)
return -EINVAL;
if (!reporter->ops->diagnose) {
devlink_health_reporter_put(reporter);
return -EOPNOTSUPP;
}
fmsg = devlink_fmsg_alloc();
if (!fmsg) {
devlink_health_reporter_put(reporter);
return -ENOMEM;
}
err = devlink_fmsg_obj_nest_start(fmsg);
if (err)
goto out;
err = reporter->ops->diagnose(reporter, fmsg, info->extack);
if (err)
goto out;
err = devlink_fmsg_obj_nest_end(fmsg);
if (err)
goto out;
err = devlink_fmsg_snd(fmsg, info,
DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
out:
devlink_fmsg_free(fmsg);
devlink_health_reporter_put(reporter);
return err;
}
static int
devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
struct netlink_callback *cb)
{
struct devlink_health_reporter *reporter;
u64 start = cb->args[0];
int err;
reporter = devlink_health_reporter_get_from_cb(cb);
if (!reporter)
return -EINVAL;
if (!reporter->ops->dump) {
err = -EOPNOTSUPP;
goto out;
}
mutex_lock(&reporter->dump_lock);
if (!start) {
err = devlink_health_do_dump(reporter, NULL, cb->extack);
if (err)
goto unlock;
cb->args[1] = reporter->dump_ts;
}
if (!reporter->dump_fmsg || cb->args[1] != reporter->dump_ts) {
NL_SET_ERR_MSG_MOD(cb->extack, "Dump trampled, please retry");
err = -EAGAIN;
goto unlock;
}
err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
unlock:
mutex_unlock(&reporter->dump_lock);
out:
devlink_health_reporter_put(reporter);
return err;
}
static int
devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_health_reporter *reporter;
reporter = devlink_health_reporter_get_from_info(devlink, info);
if (!reporter)
return -EINVAL;
if (!reporter->ops->dump) {
devlink_health_reporter_put(reporter);
return -EOPNOTSUPP;
}
mutex_lock(&reporter->dump_lock);
devlink_health_dump_clear(reporter);
mutex_unlock(&reporter->dump_lock);
devlink_health_reporter_put(reporter);
return 0;
}
struct devlink_stats {
u64 rx_bytes;
u64 rx_packets;
struct u64_stats_sync syncp;
};
/**
* struct devlink_trap_group_item - Packet trap group attributes.
* @group: Immutable packet trap group attributes.
* @refcount: Number of trap items using the group.
* @list: trap_group_list member.
* @stats: Trap group statistics.
*
* Describes packet trap group attributes. Created by devlink during trap
* registration.
*/
struct devlink_trap_group_item {
const struct devlink_trap_group *group;
refcount_t refcount;
struct list_head list;
struct devlink_stats __percpu *stats;
};
/**
* struct devlink_trap_item - Packet trap attributes.
* @trap: Immutable packet trap attributes.
* @group_item: Associated group item.
* @list: trap_list member.
* @action: Trap action.
* @stats: Trap statistics.
* @priv: Driver private information.
*
* Describes both mutable and immutable packet trap attributes. Created by
* devlink during trap registration and used for all trap related operations.
*/
struct devlink_trap_item {
const struct devlink_trap *trap;
struct devlink_trap_group_item *group_item;
struct list_head list;
enum devlink_trap_action action;
struct devlink_stats __percpu *stats;
void *priv;
};
static struct devlink_trap_item *
devlink_trap_item_lookup(struct devlink *devlink, const char *name)
{
struct devlink_trap_item *trap_item;
list_for_each_entry(trap_item, &devlink->trap_list, list) {
if (!strcmp(trap_item->trap->name, name))
return trap_item;
}
return NULL;
}
static struct devlink_trap_item *
devlink_trap_item_get_from_info(struct devlink *devlink,
struct genl_info *info)
{
struct nlattr *attr;
if (!info->attrs[DEVLINK_ATTR_TRAP_NAME])
return NULL;
attr = info->attrs[DEVLINK_ATTR_TRAP_NAME];
return devlink_trap_item_lookup(devlink, nla_data(attr));
}
static int
devlink_trap_action_get_from_info(struct genl_info *info,
enum devlink_trap_action *p_trap_action)
{
u8 val;
val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
switch (val) {
case DEVLINK_TRAP_ACTION_DROP: /* fall-through */
case DEVLINK_TRAP_ACTION_TRAP:
*p_trap_action = val;
break;
default:
return -EINVAL;
}
return 0;
}
static int devlink_trap_metadata_put(struct sk_buff *msg,
const struct devlink_trap *trap)
{
struct nlattr *attr;
attr = nla_nest_start(msg, DEVLINK_ATTR_TRAP_METADATA);
if (!attr)
return -EMSGSIZE;
if ((trap->metadata_cap & DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT) &&
nla_put_flag(msg, DEVLINK_ATTR_TRAP_METADATA_TYPE_IN_PORT))
goto nla_put_failure;
nla_nest_end(msg, attr);
return 0;
nla_put_failure:
nla_nest_cancel(msg, attr);
return -EMSGSIZE;
}
static void devlink_trap_stats_read(struct devlink_stats __percpu *trap_stats,
struct devlink_stats *stats)
{
int i;
memset(stats, 0, sizeof(*stats));
for_each_possible_cpu(i) {
struct devlink_stats *cpu_stats;
u64 rx_packets, rx_bytes;
unsigned int start;
cpu_stats = per_cpu_ptr(trap_stats, i);
do {
start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
rx_packets = cpu_stats->rx_packets;
rx_bytes = cpu_stats->rx_bytes;
} while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
stats->rx_packets += rx_packets;
stats->rx_bytes += rx_bytes;
}
}
static int devlink_trap_stats_put(struct sk_buff *msg,
struct devlink_stats __percpu *trap_stats)
{
struct devlink_stats stats;
struct nlattr *attr;
devlink_trap_stats_read(trap_stats, &stats);
attr = nla_nest_start(msg, DEVLINK_ATTR_STATS);
if (!attr)
return -EMSGSIZE;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_PACKETS,
stats.rx_packets, DEVLINK_ATTR_PAD))
goto nla_put_failure;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_STATS_RX_BYTES,
stats.rx_bytes, DEVLINK_ATTR_PAD))
goto nla_put_failure;
nla_nest_end(msg, attr);
return 0;
nla_put_failure:
nla_nest_cancel(msg, attr);
return -EMSGSIZE;
}
static int devlink_nl_trap_fill(struct sk_buff *msg, struct devlink *devlink,
const struct devlink_trap_item *trap_item,
enum devlink_command cmd, u32 portid, u32 seq,
int flags)
{
struct devlink_trap_group_item *group_item = trap_item->group_item;
void *hdr;
int err;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
group_item->group->name))
goto nla_put_failure;
if (nla_put_string(msg, DEVLINK_ATTR_TRAP_NAME, trap_item->trap->name))
goto nla_put_failure;
if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_TYPE, trap_item->trap->type))
goto nla_put_failure;
if (trap_item->trap->generic &&
nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
goto nla_put_failure;
if (nla_put_u8(msg, DEVLINK_ATTR_TRAP_ACTION, trap_item->action))
goto nla_put_failure;
err = devlink_trap_metadata_put(msg, trap_item->trap);
if (err)
goto nla_put_failure;
err = devlink_trap_stats_put(msg, trap_item->stats);
if (err)
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int devlink_nl_cmd_trap_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct netlink_ext_ack *extack = info->extack;
struct devlink *devlink = info->user_ptr[0];
struct devlink_trap_item *trap_item;
struct sk_buff *msg;
int err;
if (list_empty(&devlink->trap_list))
return -EOPNOTSUPP;
trap_item = devlink_trap_item_get_from_info(devlink, info);
if (!trap_item) {
NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
return -ENOENT;
}
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_trap_fill(msg, devlink, trap_item,
DEVLINK_CMD_TRAP_NEW, info->snd_portid,
info->snd_seq, 0);
if (err)
goto err_trap_fill;
return genlmsg_reply(msg, info);
err_trap_fill:
nlmsg_free(msg);
return err;
}
static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink_trap_item *trap_item;
struct devlink *devlink;
int start = cb->args[0];
int idx = 0;
int err;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
continue;
mutex_lock(&devlink->lock);
list_for_each_entry(trap_item, &devlink->trap_list, list) {
if (idx < start) {
idx++;
continue;
}
err = devlink_nl_trap_fill(msg, devlink, trap_item,
DEVLINK_CMD_TRAP_NEW,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NLM_F_MULTI);
if (err) {
mutex_unlock(&devlink->lock);
goto out;
}
idx++;
}
mutex_unlock(&devlink->lock);
}
out:
mutex_unlock(&devlink_mutex);
cb->args[0] = idx;
return msg->len;
}
static int __devlink_trap_action_set(struct devlink *devlink,
struct devlink_trap_item *trap_item,
enum devlink_trap_action trap_action,
struct netlink_ext_ack *extack)
{
int err;
if (trap_item->action != trap_action &&
trap_item->trap->type != DEVLINK_TRAP_TYPE_DROP) {
NL_SET_ERR_MSG_MOD(extack, "Cannot change action of non-drop traps. Skipping");
return 0;
}
err = devlink->ops->trap_action_set(devlink, trap_item->trap,
trap_action);
if (err)
return err;
trap_item->action = trap_action;
return 0;
}
static int devlink_trap_action_set(struct devlink *devlink,
struct devlink_trap_item *trap_item,
struct genl_info *info)
{
enum devlink_trap_action trap_action;
int err;
if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
return 0;
err = devlink_trap_action_get_from_info(info, &trap_action);
if (err) {
NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
return -EINVAL;
}
return __devlink_trap_action_set(devlink, trap_item, trap_action,
info->extack);
}
static int devlink_nl_cmd_trap_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct netlink_ext_ack *extack = info->extack;
struct devlink *devlink = info->user_ptr[0];
struct devlink_trap_item *trap_item;
int err;
if (list_empty(&devlink->trap_list))
return -EOPNOTSUPP;
trap_item = devlink_trap_item_get_from_info(devlink, info);
if (!trap_item) {
NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap");
return -ENOENT;
}
err = devlink_trap_action_set(devlink, trap_item, info);
if (err)
return err;
return 0;
}
static struct devlink_trap_group_item *
devlink_trap_group_item_lookup(struct devlink *devlink, const char *name)
{
struct devlink_trap_group_item *group_item;
list_for_each_entry(group_item, &devlink->trap_group_list, list) {
if (!strcmp(group_item->group->name, name))
return group_item;
}
return NULL;
}
static struct devlink_trap_group_item *
devlink_trap_group_item_get_from_info(struct devlink *devlink,
struct genl_info *info)
{
char *name;
if (!info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME])
return NULL;
name = nla_data(info->attrs[DEVLINK_ATTR_TRAP_GROUP_NAME]);
return devlink_trap_group_item_lookup(devlink, name);
}
static int
devlink_nl_trap_group_fill(struct sk_buff *msg, struct devlink *devlink,
const struct devlink_trap_group_item *group_item,
enum devlink_command cmd, u32 portid, u32 seq,
int flags)
{
void *hdr;
int err;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_string(msg, DEVLINK_ATTR_TRAP_GROUP_NAME,
group_item->group->name))
goto nla_put_failure;
if (group_item->group->generic &&
nla_put_flag(msg, DEVLINK_ATTR_TRAP_GENERIC))
goto nla_put_failure;
err = devlink_trap_stats_put(msg, group_item->stats);
if (err)
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static int devlink_nl_cmd_trap_group_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct netlink_ext_ack *extack = info->extack;
struct devlink *devlink = info->user_ptr[0];
struct devlink_trap_group_item *group_item;
struct sk_buff *msg;
int err;
if (list_empty(&devlink->trap_group_list))
return -EOPNOTSUPP;
group_item = devlink_trap_group_item_get_from_info(devlink, info);
if (!group_item) {
NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
return -ENOENT;
}
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_trap_group_fill(msg, devlink, group_item,
DEVLINK_CMD_TRAP_GROUP_NEW,
info->snd_portid, info->snd_seq, 0);
if (err)
goto err_trap_group_fill;
return genlmsg_reply(msg, info);
err_trap_group_fill:
nlmsg_free(msg);
return err;
}
static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
struct devlink_trap_group_item *group_item;
u32 portid = NETLINK_CB(cb->skb).portid;
struct devlink *devlink;
int start = cb->args[0];
int idx = 0;
int err;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
continue;
mutex_lock(&devlink->lock);
list_for_each_entry(group_item, &devlink->trap_group_list,
list) {
if (idx < start) {
idx++;
continue;
}
err = devlink_nl_trap_group_fill(msg, devlink,
group_item, cmd,
portid,
cb->nlh->nlmsg_seq,
NLM_F_MULTI);
if (err) {
mutex_unlock(&devlink->lock);
goto out;
}
idx++;
}
mutex_unlock(&devlink->lock);
}
out:
mutex_unlock(&devlink_mutex);
cb->args[0] = idx;
return msg->len;
}
static int
__devlink_trap_group_action_set(struct devlink *devlink,
struct devlink_trap_group_item *group_item,
enum devlink_trap_action trap_action,
struct netlink_ext_ack *extack)
{
const char *group_name = group_item->group->name;
struct devlink_trap_item *trap_item;
int err;
list_for_each_entry(trap_item, &devlink->trap_list, list) {
if (strcmp(trap_item->trap->group.name, group_name))
continue;
err = __devlink_trap_action_set(devlink, trap_item,
trap_action, extack);
if (err)
return err;
}
return 0;
}
static int
devlink_trap_group_action_set(struct devlink *devlink,
struct devlink_trap_group_item *group_item,
struct genl_info *info)
{
enum devlink_trap_action trap_action;
int err;
if (!info->attrs[DEVLINK_ATTR_TRAP_ACTION])
return 0;
err = devlink_trap_action_get_from_info(info, &trap_action);
if (err) {
NL_SET_ERR_MSG_MOD(info->extack, "Invalid trap action");
return -EINVAL;
}
err = __devlink_trap_group_action_set(devlink, group_item, trap_action,
info->extack);
if (err)
return err;
return 0;
}
static int devlink_nl_cmd_trap_group_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct netlink_ext_ack *extack = info->extack;
struct devlink *devlink = info->user_ptr[0];
struct devlink_trap_group_item *group_item;
int err;
if (list_empty(&devlink->trap_group_list))
return -EOPNOTSUPP;
group_item = devlink_trap_group_item_get_from_info(devlink, info);
if (!group_item) {
NL_SET_ERR_MSG_MOD(extack, "Device did not register this trap group");
return -ENOENT;
}
err = devlink_trap_group_action_set(devlink, group_item, info);
if (err)
return err;
return 0;
}
static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
[DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
[DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
[DEVLINK_ATTR_SB_INDEX] = { .type = NLA_U32 },
[DEVLINK_ATTR_SB_POOL_INDEX] = { .type = NLA_U16 },
[DEVLINK_ATTR_SB_POOL_TYPE] = { .type = NLA_U8 },
[DEVLINK_ATTR_SB_POOL_SIZE] = { .type = NLA_U32 },
[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
[DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
[DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
[DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
[DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
[DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
[DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_DPIPE_TABLE_COUNTERS_ENABLED] = { .type = NLA_U8 },
[DEVLINK_ATTR_RESOURCE_ID] = { .type = NLA_U64},
[DEVLINK_ATTR_RESOURCE_SIZE] = { .type = NLA_U64},
[DEVLINK_ATTR_PARAM_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_PARAM_TYPE] = { .type = NLA_U8 },
[DEVLINK_ATTR_PARAM_VALUE_CMODE] = { .type = NLA_U8 },
[DEVLINK_ATTR_REGION_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_REGION_SNAPSHOT_ID] = { .type = NLA_U32 },
[DEVLINK_ATTR_HEALTH_REPORTER_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] = { .type = NLA_U64 },
[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER] = { .type = NLA_U8 },
[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_TRAP_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_TRAP_ACTION] = { .type = NLA_U8 },
[DEVLINK_ATTR_TRAP_GROUP_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_NETNS_PID] = { .type = NLA_U32 },
[DEVLINK_ATTR_NETNS_FD] = { .type = NLA_U32 },
[DEVLINK_ATTR_NETNS_ID] = { .type = NLA_U32 },
};
static const struct genl_ops devlink_nl_ops[] = {
{
.cmd = DEVLINK_CMD_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_get_doit,
.dumpit = devlink_nl_cmd_get_dumpit,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_PORT_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_port_get_doit,
.dumpit = devlink_nl_cmd_port_get_dumpit,
.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_PORT_SET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_port_set_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
},
{
.cmd = DEVLINK_CMD_PORT_SPLIT,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_port_split_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NO_LOCK,
},
{
.cmd = DEVLINK_CMD_PORT_UNSPLIT,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_port_unsplit_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NO_LOCK,
},
{
.cmd = DEVLINK_CMD_SB_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_sb_get_doit,
.dumpit = devlink_nl_cmd_sb_get_dumpit,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NEED_SB,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_SB_POOL_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_sb_pool_get_doit,
.dumpit = devlink_nl_cmd_sb_pool_get_dumpit,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NEED_SB,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_SB_POOL_SET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_sb_pool_set_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NEED_SB,
},
{
.cmd = DEVLINK_CMD_SB_PORT_POOL_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_sb_port_pool_get_doit,
.dumpit = devlink_nl_cmd_sb_port_pool_get_dumpit,
.internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
DEVLINK_NL_FLAG_NEED_SB,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_SB_PORT_POOL_SET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_sb_port_pool_set_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
DEVLINK_NL_FLAG_NEED_SB,
},
{
.cmd = DEVLINK_CMD_SB_TC_POOL_BIND_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_sb_tc_pool_bind_get_doit,
.dumpit = devlink_nl_cmd_sb_tc_pool_bind_get_dumpit,
.internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
DEVLINK_NL_FLAG_NEED_SB,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_SB_TC_POOL_BIND_SET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_sb_tc_pool_bind_set_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_PORT |
DEVLINK_NL_FLAG_NEED_SB,
},
{
.cmd = DEVLINK_CMD_SB_OCC_SNAPSHOT,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_sb_occ_snapshot_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NEED_SB,
},
{
.cmd = DEVLINK_CMD_SB_OCC_MAX_CLEAR,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_sb_occ_max_clear_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NEED_SB,
},
{
.cmd = DEVLINK_CMD_ESWITCH_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_eswitch_get_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
{
.cmd = DEVLINK_CMD_ESWITCH_SET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_eswitch_set_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NO_LOCK,
},
{
.cmd = DEVLINK_CMD_DPIPE_TABLE_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_dpipe_table_get,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_DPIPE_ENTRIES_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_dpipe_entries_get,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_DPIPE_HEADERS_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_dpipe_headers_get,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_DPIPE_TABLE_COUNTERS_SET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_dpipe_table_counters_set,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
{
.cmd = DEVLINK_CMD_RESOURCE_SET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_resource_set,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
{
.cmd = DEVLINK_CMD_RESOURCE_DUMP,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_resource_dump,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_RELOAD,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_reload,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NO_LOCK,
},
{
.cmd = DEVLINK_CMD_PARAM_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_param_get_doit,
.dumpit = devlink_nl_cmd_param_get_dumpit,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_PARAM_SET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_param_set_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
{
.cmd = DEVLINK_CMD_PORT_PARAM_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_port_param_get_doit,
.dumpit = devlink_nl_cmd_port_param_get_dumpit,
.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_PORT_PARAM_SET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_port_param_set_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
},
{
.cmd = DEVLINK_CMD_REGION_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_region_get_doit,
.dumpit = devlink_nl_cmd_region_get_dumpit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
{
.cmd = DEVLINK_CMD_REGION_DEL,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_region_del,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
{
.cmd = DEVLINK_CMD_REGION_READ,
.validate = GENL_DONT_VALIDATE_STRICT |
GENL_DONT_VALIDATE_DUMP_STRICT,
.dumpit = devlink_nl_cmd_region_read_dumpit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
{
.cmd = DEVLINK_CMD_INFO_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_info_get_doit,
.dumpit = devlink_nl_cmd_info_get_dumpit,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_HEALTH_REPORTER_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_health_reporter_get_doit,
.dumpit = devlink_nl_cmd_health_reporter_get_dumpit,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NO_LOCK,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_HEALTH_REPORTER_SET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_health_reporter_set_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NO_LOCK,
},
{
.cmd = DEVLINK_CMD_HEALTH_REPORTER_RECOVER,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_health_reporter_recover_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NO_LOCK,
},
{
.cmd = DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_health_reporter_diagnose_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NO_LOCK,
},
{
.cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
.validate = GENL_DONT_VALIDATE_STRICT |
GENL_DONT_VALIDATE_DUMP_STRICT,
.dumpit = devlink_nl_cmd_health_reporter_dump_get_dumpit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NO_LOCK,
},
{
.cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
DEVLINK_NL_FLAG_NO_LOCK,
},
{
.cmd = DEVLINK_CMD_FLASH_UPDATE,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = devlink_nl_cmd_flash_update,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
{
.cmd = DEVLINK_CMD_TRAP_GET,
.doit = devlink_nl_cmd_trap_get_doit,
.dumpit = devlink_nl_cmd_trap_get_dumpit,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_TRAP_SET,
.doit = devlink_nl_cmd_trap_set_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
{
.cmd = DEVLINK_CMD_TRAP_GROUP_GET,
.doit = devlink_nl_cmd_trap_group_get_doit,
.dumpit = devlink_nl_cmd_trap_group_get_dumpit,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_TRAP_GROUP_SET,
.doit = devlink_nl_cmd_trap_group_set_doit,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
};
static struct genl_family devlink_nl_family __ro_after_init = {
.name = DEVLINK_GENL_NAME,
.version = DEVLINK_GENL_VERSION,
.maxattr = DEVLINK_ATTR_MAX,
.policy = devlink_nl_policy,
.netnsok = true,
.pre_doit = devlink_nl_pre_doit,
.post_doit = devlink_nl_post_doit,
.module = THIS_MODULE,
.ops = devlink_nl_ops,
.n_ops = ARRAY_SIZE(devlink_nl_ops),
.mcgrps = devlink_nl_mcgrps,
.n_mcgrps = ARRAY_SIZE(devlink_nl_mcgrps),
};
/**
* devlink_alloc - Allocate new devlink instance resources
*
* @ops: ops
* @priv_size: size of user private data
*
* Allocate new devlink instance resources, including devlink index
* and name.
*/
struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
{
struct devlink *devlink;
if (WARN_ON(!ops))
return NULL;
devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
if (!devlink)
return NULL;
devlink->ops = ops;
__devlink_net_set(devlink, &init_net);
INIT_LIST_HEAD(&devlink->port_list);
INIT_LIST_HEAD(&devlink->sb_list);
INIT_LIST_HEAD_RCU(&devlink->dpipe_table_list);
INIT_LIST_HEAD(&devlink->resource_list);
INIT_LIST_HEAD(&devlink->param_list);
INIT_LIST_HEAD(&devlink->region_list);
INIT_LIST_HEAD(&devlink->reporter_list);
INIT_LIST_HEAD(&devlink->trap_list);
INIT_LIST_HEAD(&devlink->trap_group_list);
mutex_init(&devlink->lock);
mutex_init(&devlink->reporters_lock);
return devlink;
}
EXPORT_SYMBOL_GPL(devlink_alloc);
/**
* devlink_register - Register devlink instance
*
* @devlink: devlink
* @dev: parent device
*/
int devlink_register(struct devlink *devlink, struct device *dev)
{
mutex_lock(&devlink_mutex);
devlink->dev = dev;
devlink->registered = true;
list_add_tail(&devlink->list, &devlink_list);
devlink_notify(devlink, DEVLINK_CMD_NEW);
mutex_unlock(&devlink_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(devlink_register);
/**
* devlink_unregister - Unregister devlink instance
*
* @devlink: devlink
*/
void devlink_unregister(struct devlink *devlink)
{
mutex_lock(&devlink_mutex);
devlink_notify(devlink, DEVLINK_CMD_DEL);
list_del(&devlink->list);
mutex_unlock(&devlink_mutex);
}
EXPORT_SYMBOL_GPL(devlink_unregister);
/**
* devlink_free - Free devlink instance resources
*
* @devlink: devlink
*/
void devlink_free(struct devlink *devlink)
{
mutex_destroy(&devlink->reporters_lock);
mutex_destroy(&devlink->lock);
WARN_ON(!list_empty(&devlink->trap_group_list));
WARN_ON(!list_empty(&devlink->trap_list));
WARN_ON(!list_empty(&devlink->reporter_list));
WARN_ON(!list_empty(&devlink->region_list));
WARN_ON(!list_empty(&devlink->param_list));
WARN_ON(!list_empty(&devlink->resource_list));
WARN_ON(!list_empty(&devlink->dpipe_table_list));
WARN_ON(!list_empty(&devlink->sb_list));
WARN_ON(!list_empty(&devlink->port_list));
kfree(devlink);
}
EXPORT_SYMBOL_GPL(devlink_free);
static void devlink_port_type_warn(struct work_struct *work)
{
WARN(true, "Type was not set for devlink port.");
}
static bool devlink_port_type_should_warn(struct devlink_port *devlink_port)
{
/* Ignore CPU and DSA flavours. */
return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU &&
devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA;
}
#define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 30)
static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port)
{
if (!devlink_port_type_should_warn(devlink_port))
return;
/* Schedule a work to WARN in case driver does not set port
* type within timeout.
*/
schedule_delayed_work(&devlink_port->type_warn_dw,
DEVLINK_PORT_TYPE_WARN_TIMEOUT);
}
static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port)
{
if (!devlink_port_type_should_warn(devlink_port))
return;
cancel_delayed_work_sync(&devlink_port->type_warn_dw);
}
/**
* devlink_port_register - Register devlink port
*
* @devlink: devlink
* @devlink_port: devlink port
* @port_index: driver-specific numerical identifier of the port
*
* Register devlink port with provided port index. User can use
* any indexing, even hw-related one. devlink_port structure
* is convenient to be embedded inside user driver private structure.
* Note that the caller should take care of zeroing the devlink_port
* structure.
*/
int devlink_port_register(struct devlink *devlink,
struct devlink_port *devlink_port,
unsigned int port_index)
{
mutex_lock(&devlink->lock);
if (devlink_port_index_exists(devlink, port_index)) {
mutex_unlock(&devlink->lock);
return -EEXIST;
}
devlink_port->devlink = devlink;
devlink_port->index = port_index;
devlink_port->registered = true;
spin_lock_init(&devlink_port->type_lock);
list_add_tail(&devlink_port->list, &devlink->port_list);
INIT_LIST_HEAD(&devlink_port->param_list);
mutex_unlock(&devlink->lock);
INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn);
devlink_port_type_warn_schedule(devlink_port);
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
return 0;
}
EXPORT_SYMBOL_GPL(devlink_port_register);
/**
* devlink_port_unregister - Unregister devlink port
*
* @devlink_port: devlink port
*/
void devlink_port_unregister(struct devlink_port *devlink_port)
{
struct devlink *devlink = devlink_port->devlink;
devlink_port_type_warn_cancel(devlink_port);
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
mutex_lock(&devlink->lock);
list_del(&devlink_port->list);
mutex_unlock(&devlink->lock);
}
EXPORT_SYMBOL_GPL(devlink_port_unregister);
static void __devlink_port_type_set(struct devlink_port *devlink_port,
enum devlink_port_type type,
void *type_dev)
{
if (WARN_ON(!devlink_port->registered))
return;
devlink_port_type_warn_cancel(devlink_port);
spin_lock_bh(&devlink_port->type_lock);
devlink_port->type = type;
devlink_port->type_dev = type_dev;
spin_unlock_bh(&devlink_port->type_lock);
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
}
/**
* devlink_port_type_eth_set - Set port type to Ethernet
*
* @devlink_port: devlink port
* @netdev: related netdevice
*/
void devlink_port_type_eth_set(struct devlink_port *devlink_port,
struct net_device *netdev)
{
const struct net_device_ops *ops = netdev->netdev_ops;
/* If driver registers devlink port, it should set devlink port
* attributes accordingly so the compat functions are called
* and the original ops are not used.
*/
if (ops->ndo_get_phys_port_name) {
/* Some drivers use the same set of ndos for netdevs
* that have devlink_port registered and also for
* those who don't. Make sure that ndo_get_phys_port_name
* returns -EOPNOTSUPP here in case it is defined.
* Warn if not.
*/
char name[IFNAMSIZ];
int err;
err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name));
WARN_ON(err != -EOPNOTSUPP);
}
if (ops->ndo_get_port_parent_id) {
/* Some drivers use the same set of ndos for netdevs
* that have devlink_port registered and also for
* those who don't. Make sure that ndo_get_port_parent_id
* returns -EOPNOTSUPP here in case it is defined.
* Warn if not.
*/
struct netdev_phys_item_id ppid;
int err;
err = ops->ndo_get_port_parent_id(netdev, &ppid);
WARN_ON(err != -EOPNOTSUPP);
}
__devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, netdev);
}
EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
/**
* devlink_port_type_ib_set - Set port type to InfiniBand
*
* @devlink_port: devlink port
* @ibdev: related IB device
*/
void devlink_port_type_ib_set(struct devlink_port *devlink_port,
struct ib_device *ibdev)
{
__devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);
}
EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
/**
* devlink_port_type_clear - Clear port type
*
* @devlink_port: devlink port
*/
void devlink_port_type_clear(struct devlink_port *devlink_port)
{
__devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);
devlink_port_type_warn_schedule(devlink_port);
}
EXPORT_SYMBOL_GPL(devlink_port_type_clear);
static int __devlink_port_attrs_set(struct devlink_port *devlink_port,
enum devlink_port_flavour flavour,
const unsigned char *switch_id,
unsigned char switch_id_len)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
if (WARN_ON(devlink_port->registered))
return -EEXIST;
attrs->set = true;
attrs->flavour = flavour;
if (switch_id) {
attrs->switch_port = true;
if (WARN_ON(switch_id_len > MAX_PHYS_ITEM_ID_LEN))
switch_id_len = MAX_PHYS_ITEM_ID_LEN;
memcpy(attrs->switch_id.id, switch_id, switch_id_len);
attrs->switch_id.id_len = switch_id_len;
} else {
attrs->switch_port = false;
}
return 0;
}
/**
* devlink_port_attrs_set - Set port attributes
*
* @devlink_port: devlink port
* @flavour: flavour of the port
* @port_number: number of the port that is facing user, for example
* the front panel port number
* @split: indicates if this is split port
* @split_subport_number: if the port is split, this is the number
* of subport.
* @switch_id: if the port is part of switch, this is buffer with ID,
* otwerwise this is NULL
* @switch_id_len: length of the switch_id buffer
*/
void devlink_port_attrs_set(struct devlink_port *devlink_port,
enum devlink_port_flavour flavour,
u32 port_number, bool split,
u32 split_subport_number,
const unsigned char *switch_id,
unsigned char switch_id_len)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
int ret;
ret = __devlink_port_attrs_set(devlink_port, flavour,
switch_id, switch_id_len);
if (ret)
return;
attrs->split = split;
attrs->phys.port_number = port_number;
attrs->phys.split_subport_number = split_subport_number;
}
EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
/**
* devlink_port_attrs_pci_pf_set - Set PCI PF port attributes
*
* @devlink_port: devlink port
* @pf: associated PF for the devlink port instance
* @switch_id: if the port is part of switch, this is buffer with ID,
* otherwise this is NULL
* @switch_id_len: length of the switch_id buffer
*/
void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port,
const unsigned char *switch_id,
unsigned char switch_id_len, u16 pf)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
int ret;
ret = __devlink_port_attrs_set(devlink_port,
DEVLINK_PORT_FLAVOUR_PCI_PF,
switch_id, switch_id_len);
if (ret)
return;
attrs->pci_pf.pf = pf;
}
EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
/**
* devlink_port_attrs_pci_vf_set - Set PCI VF port attributes
*
* @devlink_port: devlink port
* @pf: associated PF for the devlink port instance
* @vf: associated VF of a PF for the devlink port instance
* @switch_id: if the port is part of switch, this is buffer with ID,
* otherwise this is NULL
* @switch_id_len: length of the switch_id buffer
*/
void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port,
const unsigned char *switch_id,
unsigned char switch_id_len,
u16 pf, u16 vf)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
int ret;
ret = __devlink_port_attrs_set(devlink_port,
DEVLINK_PORT_FLAVOUR_PCI_VF,
switch_id, switch_id_len);
if (ret)
return;
attrs->pci_vf.pf = pf;
attrs->pci_vf.vf = vf;
}
EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
char *name, size_t len)
{
struct devlink_port_attrs *attrs = &devlink_port->attrs;
int n = 0;
if (!attrs->set)
return -EOPNOTSUPP;
switch (attrs->flavour) {
case DEVLINK_PORT_FLAVOUR_PHYSICAL:
if (!attrs->split)
n = snprintf(name, len, "p%u", attrs->phys.port_number);
else
n = snprintf(name, len, "p%us%u",
attrs->phys.port_number,
attrs->phys.split_subport_number);
break;
case DEVLINK_PORT_FLAVOUR_CPU:
case DEVLINK_PORT_FLAVOUR_DSA:
/* As CPU and DSA ports do not have a netdevice associated
* case should not ever happen.
*/
WARN_ON(1);
return -EINVAL;
case DEVLINK_PORT_FLAVOUR_PCI_PF:
n = snprintf(name, len, "pf%u", attrs->pci_pf.pf);
break;
case DEVLINK_PORT_FLAVOUR_PCI_VF:
n = snprintf(name, len, "pf%uvf%u",
attrs->pci_vf.pf, attrs->pci_vf.vf);
break;
}
if (n >= len)
return -EINVAL;
return 0;
}
int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
u32 size, u16 ingress_pools_count,
u16 egress_pools_count, u16 ingress_tc_count,
u16 egress_tc_count)
{
struct devlink_sb *devlink_sb;
int err = 0;
mutex_lock(&devlink->lock);
if (devlink_sb_index_exists(devlink, sb_index)) {
err = -EEXIST;
goto unlock;
}
devlink_sb = kzalloc(sizeof(*devlink_sb), GFP_KERNEL);
if (!devlink_sb) {
err = -ENOMEM;
goto unlock;
}
devlink_sb->index = sb_index;
devlink_sb->size = size;
devlink_sb->ingress_pools_count = ingress_pools_count;
devlink_sb->egress_pools_count = egress_pools_count;
devlink_sb->ingress_tc_count = ingress_tc_count;
devlink_sb->egress_tc_count = egress_tc_count;
list_add_tail(&devlink_sb->list, &devlink->sb_list);
unlock:
mutex_unlock(&devlink->lock);
return err;
}
EXPORT_SYMBOL_GPL(devlink_sb_register);
void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index)
{
struct devlink_sb *devlink_sb;
mutex_lock(&devlink->lock);
devlink_sb = devlink_sb_get_by_index(devlink, sb_index);
WARN_ON(!devlink_sb);
list_del(&devlink_sb->list);
mutex_unlock(&devlink->lock);
kfree(devlink_sb);
}
EXPORT_SYMBOL_GPL(devlink_sb_unregister);
/**
* devlink_dpipe_headers_register - register dpipe headers
*
* @devlink: devlink
* @dpipe_headers: dpipe header array
*
* Register the headers supported by hardware.
*/
int devlink_dpipe_headers_register(struct devlink *devlink,
struct devlink_dpipe_headers *dpipe_headers)
{
mutex_lock(&devlink->lock);
devlink->dpipe_headers = dpipe_headers;
mutex_unlock(&devlink->lock);
return 0;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_headers_register);
/**
* devlink_dpipe_headers_unregister - unregister dpipe headers
*
* @devlink: devlink
*
* Unregister the headers supported by hardware.
*/
void devlink_dpipe_headers_unregister(struct devlink *devlink)
{
mutex_lock(&devlink->lock);
devlink->dpipe_headers = NULL;
mutex_unlock(&devlink->lock);
}
EXPORT_SYMBOL_GPL(devlink_dpipe_headers_unregister);
/**
* devlink_dpipe_table_counter_enabled - check if counter allocation
* required
* @devlink: devlink
* @table_name: tables name
*
* Used by driver to check if counter allocation is required.
* After counter allocation is turned on the table entries
* are updated to include counter statistics.
*
* After that point on the driver must respect the counter
* state so that each entry added to the table is added
* with a counter.
*/
bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
const char *table_name)
{
struct devlink_dpipe_table *table;
bool enabled;
rcu_read_lock();
table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
table_name);
enabled = false;
if (table)
enabled = table->counters_enabled;
rcu_read_unlock();
return enabled;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_table_counter_enabled);
/**
* devlink_dpipe_table_register - register dpipe table
*
* @devlink: devlink
* @table_name: table name
* @table_ops: table ops
* @priv: priv
* @counter_control_extern: external control for counters
*/
int devlink_dpipe_table_register(struct devlink *devlink,
const char *table_name,
struct devlink_dpipe_table_ops *table_ops,
void *priv, bool counter_control_extern)
{
struct devlink_dpipe_table *table;
if (devlink_dpipe_table_find(&devlink->dpipe_table_list, table_name))
return -EEXIST;
if (WARN_ON(!table_ops->size_get))
return -EINVAL;
table = kzalloc(sizeof(*table), GFP_KERNEL);
if (!table)
return -ENOMEM;
table->name = table_name;
table->table_ops = table_ops;
table->priv = priv;
table->counter_control_extern = counter_control_extern;
mutex_lock(&devlink->lock);
list_add_tail_rcu(&table->list, &devlink->dpipe_table_list);
mutex_unlock(&devlink->lock);
return 0;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_table_register);
/**
* devlink_dpipe_table_unregister - unregister dpipe table
*
* @devlink: devlink
* @table_name: table name
*/
void devlink_dpipe_table_unregister(struct devlink *devlink,
const char *table_name)
{
struct devlink_dpipe_table *table;
mutex_lock(&devlink->lock);
table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
table_name);
if (!table)
goto unlock;
list_del_rcu(&table->list);
mutex_unlock(&devlink->lock);
kfree_rcu(table, rcu);
return;
unlock:
mutex_unlock(&devlink->lock);
}
EXPORT_SYMBOL_GPL(devlink_dpipe_table_unregister);
/**
* devlink_resource_register - devlink resource register
*
* @devlink: devlink
* @resource_name: resource's name
* @resource_size: resource's size
* @resource_id: resource's id
* @parent_resource_id: resource's parent id
* @size_params: size parameters
*/
int devlink_resource_register(struct devlink *devlink,
const char *resource_name,
u64 resource_size,
u64 resource_id,
u64 parent_resource_id,
const struct devlink_resource_size_params *size_params)
{
struct devlink_resource *resource;
struct list_head *resource_list;
bool top_hierarchy;
int err = 0;
top_hierarchy = parent_resource_id == DEVLINK_RESOURCE_ID_PARENT_TOP;
mutex_lock(&devlink->lock);
resource = devlink_resource_find(devlink, NULL, resource_id);
if (resource) {
err = -EINVAL;
goto out;
}
resource = kzalloc(sizeof(*resource), GFP_KERNEL);
if (!resource) {
err = -ENOMEM;
goto out;
}
if (top_hierarchy) {
resource_list = &devlink->resource_list;
} else {
struct devlink_resource *parent_resource;
parent_resource = devlink_resource_find(devlink, NULL,
parent_resource_id);
if (parent_resource) {
resource_list = &parent_resource->resource_list;
resource->parent = parent_resource;
} else {
kfree(resource);
err = -EINVAL;
goto out;
}
}
resource->name = resource_name;
resource->size = resource_size;
resource->size_new = resource_size;
resource->id = resource_id;
resource->size_valid = true;
memcpy(&resource->size_params, size_params,
sizeof(resource->size_params));
INIT_LIST_HEAD(&resource->resource_list);
list_add_tail(&resource->list, resource_list);
out:
mutex_unlock(&devlink->lock);
return err;
}
EXPORT_SYMBOL_GPL(devlink_resource_register);
/**
* devlink_resources_unregister - free all resources
*
* @devlink: devlink
* @resource: resource
*/
void devlink_resources_unregister(struct devlink *devlink,
struct devlink_resource *resource)
{
struct devlink_resource *tmp, *child_resource;
struct list_head *resource_list;
if (resource)
resource_list = &resource->resource_list;
else
resource_list = &devlink->resource_list;
if (!resource)
mutex_lock(&devlink->lock);
list_for_each_entry_safe(child_resource, tmp, resource_list, list) {
devlink_resources_unregister(devlink, child_resource);
list_del(&child_resource->list);
kfree(child_resource);
}
if (!resource)
mutex_unlock(&devlink->lock);
}
EXPORT_SYMBOL_GPL(devlink_resources_unregister);
/**
* devlink_resource_size_get - get and update size
*
* @devlink: devlink
* @resource_id: the requested resource id
* @p_resource_size: ptr to update
*/
int devlink_resource_size_get(struct devlink *devlink,
u64 resource_id,
u64 *p_resource_size)
{
struct devlink_resource *resource;
int err = 0;
mutex_lock(&devlink->lock);
resource = devlink_resource_find(devlink, NULL, resource_id);
if (!resource) {
err = -EINVAL;
goto out;
}
*p_resource_size = resource->size_new;
resource->size = resource->size_new;
out:
mutex_unlock(&devlink->lock);
return err;
}
EXPORT_SYMBOL_GPL(devlink_resource_size_get);
/**
* devlink_dpipe_table_resource_set - set the resource id
*
* @devlink: devlink
* @table_name: table name
* @resource_id: resource id
* @resource_units: number of resource's units consumed per table's entry
*/
int devlink_dpipe_table_resource_set(struct devlink *devlink,
const char *table_name, u64 resource_id,
u64 resource_units)
{
struct devlink_dpipe_table *table;
int err = 0;
mutex_lock(&devlink->lock);
table = devlink_dpipe_table_find(&devlink->dpipe_table_list,
table_name);
if (!table) {
err = -EINVAL;
goto out;
}
table->resource_id = resource_id;
table->resource_units = resource_units;
table->resource_valid = true;
out:
mutex_unlock(&devlink->lock);
return err;
}
EXPORT_SYMBOL_GPL(devlink_dpipe_table_resource_set);
/**
* devlink_resource_occ_get_register - register occupancy getter
*
* @devlink: devlink
* @resource_id: resource id
* @occ_get: occupancy getter callback
* @occ_get_priv: occupancy getter callback priv
*/
void devlink_resource_occ_get_register(struct devlink *devlink,
u64 resource_id,
devlink_resource_occ_get_t *occ_get,
void *occ_get_priv)
{
struct devlink_resource *resource;
mutex_lock(&devlink->lock);
resource = devlink_resource_find(devlink, NULL, resource_id);
if (WARN_ON(!resource))
goto out;
WARN_ON(resource->occ_get);
resource->occ_get = occ_get;
resource->occ_get_priv = occ_get_priv;
out:
mutex_unlock(&devlink->lock);
}
EXPORT_SYMBOL_GPL(devlink_resource_occ_get_register);
/**
* devlink_resource_occ_get_unregister - unregister occupancy getter
*
* @devlink: devlink
* @resource_id: resource id
*/
void devlink_resource_occ_get_unregister(struct devlink *devlink,
u64 resource_id)
{
struct devlink_resource *resource;
mutex_lock(&devlink->lock);
resource = devlink_resource_find(devlink, NULL, resource_id);
if (WARN_ON(!resource))
goto out;
WARN_ON(!resource->occ_get);
resource->occ_get = NULL;
resource->occ_get_priv = NULL;
out:
mutex_unlock(&devlink->lock);
}
EXPORT_SYMBOL_GPL(devlink_resource_occ_get_unregister);
static int devlink_param_verify(const struct devlink_param *param)
{
if (!param || !param->name || !param->supported_cmodes)
return -EINVAL;
if (param->generic)
return devlink_param_generic_verify(param);
else
return devlink_param_driver_verify(param);
}
static int __devlink_params_register(struct devlink *devlink,
unsigned int port_index,
struct list_head *param_list,
const struct devlink_param *params,
size_t params_count,
enum devlink_command reg_cmd,
enum devlink_command unreg_cmd)
{
const struct devlink_param *param = params;
int i;
int err;
mutex_lock(&devlink->lock);
for (i = 0; i < params_count; i++, param++) {
err = devlink_param_verify(param);
if (err)
goto rollback;
err = devlink_param_register_one(devlink, port_index,
param_list, param, reg_cmd);
if (err)
goto rollback;
}
mutex_unlock(&devlink->lock);
return 0;
rollback:
if (!i)
goto unlock;
for (param--; i > 0; i--, param--)
devlink_param_unregister_one(devlink, port_index, param_list,
param, unreg_cmd);
unlock:
mutex_unlock(&devlink->lock);
return err;
}
static void __devlink_params_unregister(struct devlink *devlink,
unsigned int port_index,
struct list_head *param_list,
const struct devlink_param *params,
size_t params_count,
enum devlink_command cmd)
{
const struct devlink_param *param = params;
int i;
mutex_lock(&devlink->lock);
for (i = 0; i < params_count; i++, param++)
devlink_param_unregister_one(devlink, 0, param_list, param,
cmd);
mutex_unlock(&devlink->lock);
}
/**
* devlink_params_register - register configuration parameters
*
* @devlink: devlink
* @params: configuration parameters array
* @params_count: number of parameters provided
*
* Register the configuration parameters supported by the driver.
*/
int devlink_params_register(struct devlink *devlink,
const struct devlink_param *params,
size_t params_count)
{
return __devlink_params_register(devlink, 0, &devlink->param_list,
params, params_count,
DEVLINK_CMD_PARAM_NEW,
DEVLINK_CMD_PARAM_DEL);
}
EXPORT_SYMBOL_GPL(devlink_params_register);
/**
* devlink_params_unregister - unregister configuration parameters
* @devlink: devlink
* @params: configuration parameters to unregister
* @params_count: number of parameters provided
*/
void devlink_params_unregister(struct devlink *devlink,
const struct devlink_param *params,
size_t params_count)
{
return __devlink_params_unregister(devlink, 0, &devlink->param_list,
params, params_count,
DEVLINK_CMD_PARAM_DEL);
}
EXPORT_SYMBOL_GPL(devlink_params_unregister);
/**
* devlink_params_publish - publish configuration parameters
*
* @devlink: devlink
*
* Publish previously registered configuration parameters.
*/
void devlink_params_publish(struct devlink *devlink)
{
struct devlink_param_item *param_item;
list_for_each_entry(param_item, &devlink->param_list, list) {
if (param_item->published)
continue;
param_item->published = true;
devlink_param_notify(devlink, 0, param_item,
DEVLINK_CMD_PARAM_NEW);
}
}
EXPORT_SYMBOL_GPL(devlink_params_publish);
/**
* devlink_params_unpublish - unpublish configuration parameters
*
* @devlink: devlink
*
* Unpublish previously registered configuration parameters.
*/
void devlink_params_unpublish(struct devlink *devlink)
{
struct devlink_param_item *param_item;
list_for_each_entry(param_item, &devlink->param_list, list) {
if (!param_item->published)
continue;
param_item->published = false;
devlink_param_notify(devlink, 0, param_item,
DEVLINK_CMD_PARAM_DEL);
}
}
EXPORT_SYMBOL_GPL(devlink_params_unpublish);
/**
* devlink_port_params_register - register port configuration parameters
*
* @devlink_port: devlink port
* @params: configuration parameters array
* @params_count: number of parameters provided
*
* Register the configuration parameters supported by the port.
*/
int devlink_port_params_register(struct devlink_port *devlink_port,
const struct devlink_param *params,
size_t params_count)
{
return __devlink_params_register(devlink_port->devlink,
devlink_port->index,
&devlink_port->param_list, params,
params_count,
DEVLINK_CMD_PORT_PARAM_NEW,
DEVLINK_CMD_PORT_PARAM_DEL);
}
EXPORT_SYMBOL_GPL(devlink_port_params_register);
/**
* devlink_port_params_unregister - unregister port configuration
* parameters
*
* @devlink_port: devlink port
* @params: configuration parameters array
* @params_count: number of parameters provided
*/
void devlink_port_params_unregister(struct devlink_port *devlink_port,
const struct devlink_param *params,
size_t params_count)
{
return __devlink_params_unregister(devlink_port->devlink,
devlink_port->index,
&devlink_port->param_list,
params, params_count,
DEVLINK_CMD_PORT_PARAM_DEL);
}
EXPORT_SYMBOL_GPL(devlink_port_params_unregister);
static int
__devlink_param_driverinit_value_get(struct list_head *param_list, u32 param_id,
union devlink_param_value *init_val)
{
struct devlink_param_item *param_item;
param_item = devlink_param_find_by_id(param_list, param_id);
if (!param_item)
return -EINVAL;
if (!param_item->driverinit_value_valid ||
!devlink_param_cmode_is_supported(param_item->param,
DEVLINK_PARAM_CMODE_DRIVERINIT))
return -EOPNOTSUPP;
if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
strcpy(init_val->vstr, param_item->driverinit_value.vstr);
else
*init_val = param_item->driverinit_value;
return 0;
}
static int
__devlink_param_driverinit_value_set(struct devlink *devlink,
unsigned int port_index,
struct list_head *param_list, u32 param_id,
union devlink_param_value init_val,
enum devlink_command cmd)
{
struct devlink_param_item *param_item;
param_item = devlink_param_find_by_id(param_list, param_id);
if (!param_item)
return -EINVAL;
if (!devlink_param_cmode_is_supported(param_item->param,
DEVLINK_PARAM_CMODE_DRIVERINIT))
return -EOPNOTSUPP;
if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
strcpy(param_item->driverinit_value.vstr, init_val.vstr);
else
param_item->driverinit_value = init_val;
param_item->driverinit_value_valid = true;
devlink_param_notify(devlink, port_index, param_item, cmd);
return 0;
}
/**
* devlink_param_driverinit_value_get - get configuration parameter
* value for driver initializing
*
* @devlink: devlink
* @param_id: parameter ID
* @init_val: value of parameter in driverinit configuration mode
*
* This function should be used by the driver to get driverinit
* configuration for initialization after reload command.
*/
int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
union devlink_param_value *init_val)
{
if (!devlink_reload_supported(devlink))
return -EOPNOTSUPP;
return __devlink_param_driverinit_value_get(&devlink->param_list,
param_id, init_val);
}
EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_get);
/**
* devlink_param_driverinit_value_set - set value of configuration
* parameter for driverinit
* configuration mode
*
* @devlink: devlink
* @param_id: parameter ID
* @init_val: value of parameter to set for driverinit configuration mode
*
* This function should be used by the driver to set driverinit
* configuration mode default value.
*/
int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
union devlink_param_value init_val)
{
return __devlink_param_driverinit_value_set(devlink, 0,
&devlink->param_list,
param_id, init_val,
DEVLINK_CMD_PARAM_NEW);
}
EXPORT_SYMBOL_GPL(devlink_param_driverinit_value_set);
/**
* devlink_port_param_driverinit_value_get - get configuration parameter
* value for driver initializing
*
* @devlink_port: devlink_port
* @param_id: parameter ID
* @init_val: value of parameter in driverinit configuration mode
*
* This function should be used by the driver to get driverinit
* configuration for initialization after reload command.
*/
int devlink_port_param_driverinit_value_get(struct devlink_port *devlink_port,
u32 param_id,
union devlink_param_value *init_val)
{
struct devlink *devlink = devlink_port->devlink;
if (!devlink_reload_supported(devlink))
return -EOPNOTSUPP;
return __devlink_param_driverinit_value_get(&devlink_port->param_list,
param_id, init_val);
}
EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_get);
/**
* devlink_port_param_driverinit_value_set - set value of configuration
* parameter for driverinit
* configuration mode
*
* @devlink_port: devlink_port
* @param_id: parameter ID
* @init_val: value of parameter to set for driverinit configuration mode
*
* This function should be used by the driver to set driverinit
* configuration mode default value.
*/
int devlink_port_param_driverinit_value_set(struct devlink_port *devlink_port,
u32 param_id,
union devlink_param_value init_val)
{
return __devlink_param_driverinit_value_set(devlink_port->devlink,
devlink_port->index,
&devlink_port->param_list,
param_id, init_val,
DEVLINK_CMD_PORT_PARAM_NEW);
}
EXPORT_SYMBOL_GPL(devlink_port_param_driverinit_value_set);
/**
* devlink_param_value_changed - notify devlink on a parameter's value
* change. Should be called by the driver
* right after the change.
*
* @devlink: devlink
* @param_id: parameter ID
*
* This function should be used by the driver to notify devlink on value
* change, excluding driverinit configuration mode.
* For driverinit configuration mode driver should use the function
*/
void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
{
struct devlink_param_item *param_item;
param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
WARN_ON(!param_item);
devlink_param_notify(devlink, 0, param_item, DEVLINK_CMD_PARAM_NEW);
}
EXPORT_SYMBOL_GPL(devlink_param_value_changed);
/**
* devlink_port_param_value_changed - notify devlink on a parameter's value
* change. Should be called by the driver
* right after the change.
*
* @devlink_port: devlink_port
* @param_id: parameter ID
*
* This function should be used by the driver to notify devlink on value
* change, excluding driverinit configuration mode.
* For driverinit configuration mode driver should use the function
* devlink_port_param_driverinit_value_set() instead.
*/
void devlink_port_param_value_changed(struct devlink_port *devlink_port,
u32 param_id)
{
struct devlink_param_item *param_item;
param_item = devlink_param_find_by_id(&devlink_port->param_list,
param_id);
WARN_ON(!param_item);
devlink_param_notify(devlink_port->devlink, devlink_port->index,
param_item, DEVLINK_CMD_PORT_PARAM_NEW);
}
EXPORT_SYMBOL_GPL(devlink_port_param_value_changed);
/**
* devlink_param_value_str_fill - Safely fill-up the string preventing
* from overflow of the preallocated buffer
*
* @dst_val: destination devlink_param_value
* @src: source buffer
*/
void devlink_param_value_str_fill(union devlink_param_value *dst_val,
const char *src)
{
size_t len;
len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
}
EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
/**
* devlink_region_create - create a new address region
*
* @devlink: devlink
* @region_name: region name
* @region_max_snapshots: Maximum supported number of snapshots for region
* @region_size: size of region
*/
struct devlink_region *devlink_region_create(struct devlink *devlink,
const char *region_name,
u32 region_max_snapshots,
u64 region_size)
{
struct devlink_region *region;
int err = 0;
mutex_lock(&devlink->lock);
if (devlink_region_get_by_name(devlink, region_name)) {
err = -EEXIST;
goto unlock;
}
region = kzalloc(sizeof(*region), GFP_KERNEL);
if (!region) {
err = -ENOMEM;
goto unlock;
}
region->devlink = devlink;
region->max_snapshots = region_max_snapshots;
region->name = region_name;
region->size = region_size;
INIT_LIST_HEAD(&region->snapshot_list);
list_add_tail(&region->list, &devlink->region_list);
devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_NEW);
mutex_unlock(&devlink->lock);
return region;
unlock:
mutex_unlock(&devlink->lock);
return ERR_PTR(err);
}
EXPORT_SYMBOL_GPL(devlink_region_create);
/**
* devlink_region_destroy - destroy address region
*
* @region: devlink region to destroy
*/
void devlink_region_destroy(struct devlink_region *region)
{
struct devlink *devlink = region->devlink;
struct devlink_snapshot *snapshot, *ts;
mutex_lock(&devlink->lock);
/* Free all snapshots of region */
list_for_each_entry_safe(snapshot, ts, &region->snapshot_list, list)
devlink_region_snapshot_del(region, snapshot);
list_del(&region->list);
devlink_nl_region_notify(region, NULL, DEVLINK_CMD_REGION_DEL);
mutex_unlock(&devlink->lock);
kfree(region);
}
EXPORT_SYMBOL_GPL(devlink_region_destroy);
/**
* devlink_region_shapshot_id_get - get snapshot ID
*
* This callback should be called when adding a new snapshot,
* Driver should use the same id for multiple snapshots taken
* on multiple regions at the same time/by the same trigger.
*
* @devlink: devlink
*/
u32 devlink_region_shapshot_id_get(struct devlink *devlink)
{
u32 id;
mutex_lock(&devlink->lock);
id = ++devlink->snapshot_id;
mutex_unlock(&devlink->lock);
return id;
}
EXPORT_SYMBOL_GPL(devlink_region_shapshot_id_get);
/**
* devlink_region_snapshot_create - create a new snapshot
* This will add a new snapshot of a region. The snapshot
* will be stored on the region struct and can be accessed
* from devlink. This is useful for future analyses of snapshots.
* Multiple snapshots can be created on a region.
* The @snapshot_id should be obtained using the getter function.
*
* @region: devlink region of the snapshot
* @data: snapshot data
* @snapshot_id: snapshot id to be created
* @data_destructor: pointer to destructor function to free data
*/
int devlink_region_snapshot_create(struct devlink_region *region,
u8 *data, u32 snapshot_id,
devlink_snapshot_data_dest_t *data_destructor)
{
struct devlink *devlink = region->devlink;
struct devlink_snapshot *snapshot;
int err;
mutex_lock(&devlink->lock);
/* check if region can hold one more snapshot */
if (region->cur_snapshots == region->max_snapshots) {
err = -ENOMEM;
goto unlock;
}
if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
err = -EEXIST;
goto unlock;
}
snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
if (!snapshot) {
err = -ENOMEM;
goto unlock;
}
snapshot->id = snapshot_id;
snapshot->region = region;
snapshot->data = data;
snapshot->data_destructor = data_destructor;
list_add_tail(&snapshot->list, &region->snapshot_list);
region->cur_snapshots++;
devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
mutex_unlock(&devlink->lock);
return 0;
unlock:
mutex_unlock(&devlink->lock);
return err;
}
EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
#define DEVLINK_TRAP(_id, _type) \
{ \
.type = DEVLINK_TRAP_TYPE_##_type, \
.id = DEVLINK_TRAP_GENERIC_ID_##_id, \
.name = DEVLINK_TRAP_GENERIC_NAME_##_id, \
}
static const struct devlink_trap devlink_trap_generic[] = {
DEVLINK_TRAP(SMAC_MC, DROP),
DEVLINK_TRAP(VLAN_TAG_MISMATCH, DROP),
DEVLINK_TRAP(INGRESS_VLAN_FILTER, DROP),
DEVLINK_TRAP(INGRESS_STP_FILTER, DROP),
DEVLINK_TRAP(EMPTY_TX_LIST, DROP),
DEVLINK_TRAP(PORT_LOOPBACK_FILTER, DROP),
DEVLINK_TRAP(BLACKHOLE_ROUTE, DROP),
DEVLINK_TRAP(TTL_ERROR, EXCEPTION),
DEVLINK_TRAP(TAIL_DROP, DROP),
};
#define DEVLINK_TRAP_GROUP(_id) \
{ \
.id = DEVLINK_TRAP_GROUP_GENERIC_ID_##_id, \
.name = DEVLINK_TRAP_GROUP_GENERIC_NAME_##_id, \
}
static const struct devlink_trap_group devlink_trap_group_generic[] = {
DEVLINK_TRAP_GROUP(L2_DROPS),
DEVLINK_TRAP_GROUP(L3_DROPS),
DEVLINK_TRAP_GROUP(BUFFER_DROPS),
};
static int devlink_trap_generic_verify(const struct devlink_trap *trap)
{
if (trap->id > DEVLINK_TRAP_GENERIC_ID_MAX)
return -EINVAL;
if (strcmp(trap->name, devlink_trap_generic[trap->id].name))
return -EINVAL;
if (trap->type != devlink_trap_generic[trap->id].type)
return -EINVAL;
return 0;
}
static int devlink_trap_driver_verify(const struct devlink_trap *trap)
{
int i;
if (trap->id <= DEVLINK_TRAP_GENERIC_ID_MAX)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(devlink_trap_generic); i++) {
if (!strcmp(trap->name, devlink_trap_generic[i].name))
return -EEXIST;
}
return 0;
}
static int devlink_trap_verify(const struct devlink_trap *trap)
{
if (!trap || !trap->name || !trap->group.name)
return -EINVAL;
if (trap->generic)
return devlink_trap_generic_verify(trap);
else
return devlink_trap_driver_verify(trap);
}
static int
devlink_trap_group_generic_verify(const struct devlink_trap_group *group)
{
if (group->id > DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
return -EINVAL;
if (strcmp(group->name, devlink_trap_group_generic[group->id].name))
return -EINVAL;
return 0;
}
static int
devlink_trap_group_driver_verify(const struct devlink_trap_group *group)
{
int i;
if (group->id <= DEVLINK_TRAP_GROUP_GENERIC_ID_MAX)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(devlink_trap_group_generic); i++) {
if (!strcmp(group->name, devlink_trap_group_generic[i].name))
return -EEXIST;
}
return 0;
}
static int devlink_trap_group_verify(const struct devlink_trap_group *group)
{
if (group->generic)
return devlink_trap_group_generic_verify(group);
else
return devlink_trap_group_driver_verify(group);
}
static void
devlink_trap_group_notify(struct devlink *devlink,
const struct devlink_trap_group_item *group_item,
enum devlink_command cmd)
{
struct sk_buff *msg;
int err;
WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_trap_group_fill(msg, devlink, group_item, cmd, 0, 0,
0);
if (err) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
static struct devlink_trap_group_item *
devlink_trap_group_item_create(struct devlink *devlink,
const struct devlink_trap_group *group)
{
struct devlink_trap_group_item *group_item;
int err;
err = devlink_trap_group_verify(group);
if (err)
return ERR_PTR(err);
group_item = kzalloc(sizeof(*group_item), GFP_KERNEL);
if (!group_item)
return ERR_PTR(-ENOMEM);
group_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
if (!group_item->stats) {
err = -ENOMEM;
goto err_stats_alloc;
}
group_item->group = group;
refcount_set(&group_item->refcount, 1);
if (devlink->ops->trap_group_init) {
err = devlink->ops->trap_group_init(devlink, group);
if (err)
goto err_group_init;
}
list_add_tail(&group_item->list, &devlink->trap_group_list);
devlink_trap_group_notify(devlink, group_item,
DEVLINK_CMD_TRAP_GROUP_NEW);
return group_item;
err_group_init:
free_percpu(group_item->stats);
err_stats_alloc:
kfree(group_item);
return ERR_PTR(err);
}
static void
devlink_trap_group_item_destroy(struct devlink *devlink,
struct devlink_trap_group_item *group_item)
{
devlink_trap_group_notify(devlink, group_item,
DEVLINK_CMD_TRAP_GROUP_DEL);
list_del(&group_item->list);
free_percpu(group_item->stats);
kfree(group_item);
}
static struct devlink_trap_group_item *
devlink_trap_group_item_get(struct devlink *devlink,
const struct devlink_trap_group *group)
{
struct devlink_trap_group_item *group_item;
group_item = devlink_trap_group_item_lookup(devlink, group->name);
if (group_item) {
refcount_inc(&group_item->refcount);
return group_item;
}
return devlink_trap_group_item_create(devlink, group);
}
static void
devlink_trap_group_item_put(struct devlink *devlink,
struct devlink_trap_group_item *group_item)
{
if (!refcount_dec_and_test(&group_item->refcount))
return;
devlink_trap_group_item_destroy(devlink, group_item);
}
static int
devlink_trap_item_group_link(struct devlink *devlink,
struct devlink_trap_item *trap_item)
{
struct devlink_trap_group_item *group_item;
group_item = devlink_trap_group_item_get(devlink,
&trap_item->trap->group);
if (IS_ERR(group_item))
return PTR_ERR(group_item);
trap_item->group_item = group_item;
return 0;
}
static void
devlink_trap_item_group_unlink(struct devlink *devlink,
struct devlink_trap_item *trap_item)
{
devlink_trap_group_item_put(devlink, trap_item->group_item);
}
static void devlink_trap_notify(struct devlink *devlink,
const struct devlink_trap_item *trap_item,
enum devlink_command cmd)
{
struct sk_buff *msg;
int err;
WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
cmd != DEVLINK_CMD_TRAP_DEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_trap_fill(msg, devlink, trap_item, cmd, 0, 0, 0);
if (err) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
static int
devlink_trap_register(struct devlink *devlink,
const struct devlink_trap *trap, void *priv)
{
struct devlink_trap_item *trap_item;
int err;
if (devlink_trap_item_lookup(devlink, trap->name))
return -EEXIST;
trap_item = kzalloc(sizeof(*trap_item), GFP_KERNEL);
if (!trap_item)
return -ENOMEM;
trap_item->stats = netdev_alloc_pcpu_stats(struct devlink_stats);
if (!trap_item->stats) {
err = -ENOMEM;
goto err_stats_alloc;
}
trap_item->trap = trap;
trap_item->action = trap->init_action;
trap_item->priv = priv;
err = devlink_trap_item_group_link(devlink, trap_item);
if (err)
goto err_group_link;
err = devlink->ops->trap_init(devlink, trap, trap_item);
if (err)
goto err_trap_init;
list_add_tail(&trap_item->list, &devlink->trap_list);
devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);
return 0;
err_trap_init:
devlink_trap_item_group_unlink(devlink, trap_item);
err_group_link:
free_percpu(trap_item->stats);
err_stats_alloc:
kfree(trap_item);
return err;
}
static void devlink_trap_unregister(struct devlink *devlink,
const struct devlink_trap *trap)
{
struct devlink_trap_item *trap_item;
trap_item = devlink_trap_item_lookup(devlink, trap->name);
if (WARN_ON_ONCE(!trap_item))
return;
devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);
list_del(&trap_item->list);
if (devlink->ops->trap_fini)
devlink->ops->trap_fini(devlink, trap, trap_item);
devlink_trap_item_group_unlink(devlink, trap_item);
free_percpu(trap_item->stats);
kfree(trap_item);
}
static void devlink_trap_disable(struct devlink *devlink,
const struct devlink_trap *trap)
{
struct devlink_trap_item *trap_item;
trap_item = devlink_trap_item_lookup(devlink, trap->name);
if (WARN_ON_ONCE(!trap_item))
return;
devlink->ops->trap_action_set(devlink, trap, DEVLINK_TRAP_ACTION_DROP);
trap_item->action = DEVLINK_TRAP_ACTION_DROP;
}
/**
* devlink_traps_register - Register packet traps with devlink.
* @devlink: devlink.
* @traps: Packet traps.
* @traps_count: Count of provided packet traps.
* @priv: Driver private information.
*
* Return: Non-zero value on failure.
*/
int devlink_traps_register(struct devlink *devlink,
const struct devlink_trap *traps,
size_t traps_count, void *priv)
{
int i, err;
if (!devlink->ops->trap_init || !devlink->ops->trap_action_set)
return -EINVAL;
mutex_lock(&devlink->lock);
for (i = 0; i < traps_count; i++) {
const struct devlink_trap *trap = &traps[i];
err = devlink_trap_verify(trap);
if (err)
goto err_trap_verify;
err = devlink_trap_register(devlink, trap, priv);
if (err)
goto err_trap_register;
}
mutex_unlock(&devlink->lock);
return 0;
err_trap_register:
err_trap_verify:
for (i--; i >= 0; i--)
devlink_trap_unregister(devlink, &traps[i]);
mutex_unlock(&devlink->lock);
return err;
}
EXPORT_SYMBOL_GPL(devlink_traps_register);
/**
* devlink_traps_unregister - Unregister packet traps from devlink.
* @devlink: devlink.
* @traps: Packet traps.
* @traps_count: Count of provided packet traps.
*/
void devlink_traps_unregister(struct devlink *devlink,
const struct devlink_trap *traps,
size_t traps_count)
{
int i;
mutex_lock(&devlink->lock);
/* Make sure we do not have any packets in-flight while unregistering
* traps by disabling all of them and waiting for a grace period.
*/
for (i = traps_count - 1; i >= 0; i--)
devlink_trap_disable(devlink, &traps[i]);
synchronize_rcu();
for (i = traps_count - 1; i >= 0; i--)
devlink_trap_unregister(devlink, &traps[i]);
mutex_unlock(&devlink->lock);
}
EXPORT_SYMBOL_GPL(devlink_traps_unregister);
static void
devlink_trap_stats_update(struct devlink_stats __percpu *trap_stats,
size_t skb_len)
{
struct devlink_stats *stats;
stats = this_cpu_ptr(trap_stats);
u64_stats_update_begin(&stats->syncp);
stats->rx_bytes += skb_len;
stats->rx_packets++;
u64_stats_update_end(&stats->syncp);
}
static void
devlink_trap_report_metadata_fill(struct net_dm_hw_metadata *hw_metadata,
const struct devlink_trap_item *trap_item,
struct devlink_port *in_devlink_port)
{
struct devlink_trap_group_item *group_item = trap_item->group_item;
hw_metadata->trap_group_name = group_item->group->name;
hw_metadata->trap_name = trap_item->trap->name;
spin_lock(&in_devlink_port->type_lock);
if (in_devlink_port->type == DEVLINK_PORT_TYPE_ETH)
hw_metadata->input_dev = in_devlink_port->type_dev;
spin_unlock(&in_devlink_port->type_lock);
}
/**
* devlink_trap_report - Report trapped packet to drop monitor.
* @devlink: devlink.
* @skb: Trapped packet.
* @trap_ctx: Trap context.
* @in_devlink_port: Input devlink port.
*/
void devlink_trap_report(struct devlink *devlink, struct sk_buff *skb,
void *trap_ctx, struct devlink_port *in_devlink_port)
{
struct devlink_trap_item *trap_item = trap_ctx;
struct net_dm_hw_metadata hw_metadata = {};
devlink_trap_stats_update(trap_item->stats, skb->len);
devlink_trap_stats_update(trap_item->group_item->stats, skb->len);
devlink_trap_report_metadata_fill(&hw_metadata, trap_item,
in_devlink_port);
net_dm_hw_report(skb, &hw_metadata);
}
EXPORT_SYMBOL_GPL(devlink_trap_report);
/**
* devlink_trap_ctx_priv - Trap context to driver private information.
* @trap_ctx: Trap context.
*
* Return: Driver private information passed during registration.
*/
void *devlink_trap_ctx_priv(void *trap_ctx)
{
struct devlink_trap_item *trap_item = trap_ctx;
return trap_item->priv;
}
EXPORT_SYMBOL_GPL(devlink_trap_ctx_priv);
static void __devlink_compat_running_version(struct devlink *devlink,
char *buf, size_t len)
{
const struct nlattr *nlattr;
struct devlink_info_req req;
struct sk_buff *msg;
int rem, err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
req.msg = msg;
err = devlink->ops->info_get(devlink, &req, NULL);
if (err)
goto free_msg;
nla_for_each_attr(nlattr, (void *)msg->data, msg->len, rem) {
const struct nlattr *kv;
int rem_kv;
if (nla_type(nlattr) != DEVLINK_ATTR_INFO_VERSION_RUNNING)
continue;
nla_for_each_nested(kv, nlattr, rem_kv) {
if (nla_type(kv) != DEVLINK_ATTR_INFO_VERSION_VALUE)
continue;
strlcat(buf, nla_data(kv), len);
strlcat(buf, " ", len);
}
}
free_msg:
nlmsg_free(msg);
}
void devlink_compat_running_version(struct net_device *dev,
char *buf, size_t len)
{
struct devlink *devlink;
dev_hold(dev);
rtnl_unlock();
devlink = netdev_to_devlink(dev);
if (!devlink || !devlink->ops->info_get)
goto out;
mutex_lock(&devlink->lock);
__devlink_compat_running_version(devlink, buf, len);
mutex_unlock(&devlink->lock);
out:
rtnl_lock();
dev_put(dev);
}
int devlink_compat_flash_update(struct net_device *dev, const char *file_name)
{
struct devlink *devlink;
int ret;
dev_hold(dev);
rtnl_unlock();
devlink = netdev_to_devlink(dev);
if (!devlink || !devlink->ops->flash_update) {
ret = -EOPNOTSUPP;
goto out;
}
mutex_lock(&devlink->lock);
ret = devlink->ops->flash_update(devlink, file_name, NULL, NULL);
mutex_unlock(&devlink->lock);
out:
rtnl_lock();
dev_put(dev);
return ret;
}
int devlink_compat_phys_port_name_get(struct net_device *dev,
char *name, size_t len)
{
struct devlink_port *devlink_port;
/* RTNL mutex is held here which ensures that devlink_port
* instance cannot disappear in the middle. No need to take
* any devlink lock as only permanent values are accessed.
*/
ASSERT_RTNL();
devlink_port = netdev_to_devlink_port(dev);
if (!devlink_port)
return -EOPNOTSUPP;
return __devlink_port_phys_port_name_get(devlink_port, name, len);
}
int devlink_compat_switch_id_get(struct net_device *dev,
struct netdev_phys_item_id *ppid)
{
struct devlink_port *devlink_port;
/* Caller must hold RTNL mutex or reference to dev, which ensures that
* devlink_port instance cannot disappear in the middle. No need to take
* any devlink lock as only permanent values are accessed.
*/
devlink_port = netdev_to_devlink_port(dev);
if (!devlink_port || !devlink_port->attrs.switch_port)
return -EOPNOTSUPP;
memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
return 0;
}
static void __net_exit devlink_pernet_pre_exit(struct net *net)
{
struct devlink *devlink;
int err;
/* In case network namespace is getting destroyed, reload
* all devlink instances from this namespace into init_net.
*/
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (net_eq(devlink_net(devlink), net)) {
if (WARN_ON(!devlink_reload_supported(devlink)))
continue;
err = devlink_reload(devlink, &init_net, NULL);
if (err)
pr_warn("Failed to reload devlink instance into init_net\n");
}
}
mutex_unlock(&devlink_mutex);
}
static struct pernet_operations devlink_pernet_ops __net_initdata = {
.pre_exit = devlink_pernet_pre_exit,
};
static int __init devlink_init(void)
{
int err;
err = genl_register_family(&devlink_nl_family);
if (err)
goto out;
err = register_pernet_subsys(&devlink_pernet_ops);
out:
WARN_ON(err);
return err;
}
subsys_initcall(devlink_init);
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