#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>
#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);
EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_trap_report);
static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = {
[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY },
};
static LIST_HEAD(devlink_list);
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 devlink_port *port;
struct list_head list;
union {
const struct devlink_region_ops *ops;
const struct devlink_port_region_ops *port_ops;
};
struct list_head snapshot_list;
u32 max_snapshots;
u32 cur_snapshots;
u64 size;
};
struct devlink_snapshot {
struct list_head list;
struct devlink_region *region;
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->ops->name, region_name))
return region;
return NULL;
}
static struct devlink_region *
devlink_port_region_get_by_name(struct devlink_port *port,
const char *region_name)
{
struct devlink_region *region;
list_for_each_entry(region, &port->region_list, list)
if (!strcmp(region->ops->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, ®ion->snapshot_list, list)
if (snapshot->id == id)
return snapshot;
return NULL;
}
#define DEVLINK_NL_FLAG_NEED_PORT BIT(0)
#define DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT BIT(1)
#define DEVLINK_NL_FLAG_NO_LOCK BIT(2)
static int devlink_nl_pre_doit(const struct genl_ops *ops,
struct sk_buff *skb, struct genl_info *info)
{
struct devlink_port *devlink_port;
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);
info->user_ptr[0] = devlink;
if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_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[1] = devlink_port;
} else if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT) {
devlink_port = devlink_port_get_from_info(devlink, info);
if (!IS_ERR(devlink_port))
info->user_ptr[1] = devlink_port;
}
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;
devlink = info->user_ptr[0];
if (~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;
}
struct devlink_reload_combination {
enum devlink_reload_action action;
enum devlink_reload_limit limit;
};
static const struct devlink_reload_combination devlink_reload_invalid_combinations[] = {
{
.action = DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
.limit = DEVLINK_RELOAD_LIMIT_NO_RESET,
},
};
static bool
devlink_reload_combination_is_invalid(enum devlink_reload_action action,
enum devlink_reload_limit limit)
{
int i;
for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++)
if (devlink_reload_invalid_combinations[i].action == action &&
devlink_reload_invalid_combinations[i].limit == limit)
return true;
return false;
}
static bool
devlink_reload_action_is_supported(struct devlink *devlink, enum devlink_reload_action action)
{
return test_bit(action, &devlink->ops->reload_actions);
}
static bool
devlink_reload_limit_is_supported(struct devlink *devlink, enum devlink_reload_limit limit)
{
return test_bit(limit, &devlink->ops->reload_limits);
}
static int devlink_reload_stat_put(struct sk_buff *msg,
enum devlink_reload_limit limit, u32 value)
{
struct nlattr *reload_stats_entry;
reload_stats_entry = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_STATS_ENTRY);
if (!reload_stats_entry)
return -EMSGSIZE;
if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_STATS_LIMIT, limit) ||
nla_put_u32(msg, DEVLINK_ATTR_RELOAD_STATS_VALUE, value))
goto nla_put_failure;
nla_nest_end(msg, reload_stats_entry);
return 0;
nla_put_failure:
nla_nest_cancel(msg, reload_stats_entry);
return -EMSGSIZE;
}
static int devlink_reload_stats_put(struct sk_buff *msg, struct devlink *devlink, bool is_remote)
{
struct nlattr *reload_stats_attr, *act_info, *act_stats;
int i, j, stat_idx;
u32 value;
if (!is_remote)
reload_stats_attr = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_STATS);
else
reload_stats_attr = nla_nest_start(msg, DEVLINK_ATTR_REMOTE_RELOAD_STATS);
if (!reload_stats_attr)
return -EMSGSIZE;
for (i = 0; i <= DEVLINK_RELOAD_ACTION_MAX; i++) {
if ((!is_remote &&
!devlink_reload_action_is_supported(devlink, i)) ||
i == DEVLINK_RELOAD_ACTION_UNSPEC)
continue;
act_info = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_ACTION_INFO);
if (!act_info)
goto nla_put_failure;
if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_ACTION, i))
goto action_info_nest_cancel;
act_stats = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_ACTION_STATS);
if (!act_stats)
goto action_info_nest_cancel;
for (j = 0; j <= DEVLINK_RELOAD_LIMIT_MAX; j++) {
if ((!is_remote && j != DEVLINK_RELOAD_LIMIT_UNSPEC &&
!devlink_reload_limit_is_supported(devlink, j)) ||
devlink_reload_combination_is_invalid(i, j))
continue;
stat_idx = j * __DEVLINK_RELOAD_ACTION_MAX + i;
if (!is_remote)
value = devlink->stats.reload_stats[stat_idx];
else
value = devlink->stats.remote_reload_stats[stat_idx];
if (devlink_reload_stat_put(msg, j, value))
goto action_stats_nest_cancel;
}
nla_nest_end(msg, act_stats);
nla_nest_end(msg, act_info);
}
nla_nest_end(msg, reload_stats_attr);
return 0;
action_stats_nest_cancel:
nla_nest_cancel(msg, act_stats);
action_info_nest_cancel:
nla_nest_cancel(msg, act_info);
nla_put_failure:
nla_nest_cancel(msg, reload_stats_attr);
return -EMSGSIZE;
}
static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
enum devlink_command cmd, u32 portid,
u32 seq, int flags)
{
struct nlattr *dev_stats;
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;
dev_stats = nla_nest_start(msg, DEVLINK_ATTR_DEV_STATS);
if (!dev_stats)
goto nla_put_failure;
if (devlink_reload_stats_put(msg, devlink, false))
goto dev_stats_nest_cancel;
if (devlink_reload_stats_put(msg, devlink, true))
goto dev_stats_nest_cancel;
nla_nest_end(msg, dev_stats);
genlmsg_end(msg, hdr);
return 0;
dev_stats_nest_cancel:
nla_nest_cancel(msg, dev_stats);
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 (!devlink_port->attrs_set)
return 0;
if (attrs->lanes) {
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_LANES, attrs->lanes))
return -EMSGSIZE;
}
if (nla_put_u8(msg, DEVLINK_ATTR_PORT_SPLITTABLE, attrs->splittable))
return -EMSGSIZE;
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_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
attrs->pci_pf.controller) ||
nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_pf.pf))
return -EMSGSIZE;
if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_pf.external))
return -EMSGSIZE;
break;
case DEVLINK_PORT_FLAVOUR_PCI_VF:
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER,
attrs->pci_vf.controller) ||
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;
if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_vf.external))
return -EMSGSIZE;
break;
case DEVLINK_PORT_FLAVOUR_PHYSICAL:
case DEVLINK_PORT_FLAVOUR_CPU:
case DEVLINK_PORT_FLAVOUR_DSA:
case DEVLINK_PORT_FLAVOUR_VIRTUAL:
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_function_attrs_put(struct sk_buff *msg, struct devlink_port *port,
struct netlink_ext_ack *extack)
{
struct devlink *devlink = port->devlink;
const struct devlink_ops *ops;
struct nlattr *function_attr;
bool empty_nest = true;
int err = 0;
function_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PORT_FUNCTION);
if (!function_attr)
return -EMSGSIZE;
ops = devlink->ops;
if (ops->port_function_hw_addr_get) {
int hw_addr_len;
u8 hw_addr[MAX_ADDR_LEN];
err = ops->port_function_hw_addr_get(devlink, port, hw_addr, &hw_addr_len, extack);
if (err == -EOPNOTSUPP) {
err = 0;
goto out;
} else if (err) {
goto out;
}
err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr);
if (err)
goto out;
empty_nest = false;
}
out:
if (err || empty_nest)
nla_nest_cancel(msg, function_attr);
else
nla_nest_end(msg, function_attr);
return err;
}
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,
struct netlink_ext_ack *extack)
{
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;
rtnl_lock();
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 *net = devlink_net(devlink_port->devlink);
struct net_device *netdev = devlink_port->type_dev;
if (netdev && net_eq(net, dev_net(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);
rtnl_unlock();
if (devlink_nl_port_attrs_put(msg, devlink_port))
goto nla_put_failure;
if (devlink_nl_port_function_attrs_put(msg, devlink_port, extack))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure_type_locked:
spin_unlock_bh(&devlink_port->type_lock);
rtnl_unlock();
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,
NULL);
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[1];
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,
info->extack);
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,
cb->extack);
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)
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_port_function_hw_addr_set(struct devlink *devlink, struct devlink_port *port,
const struct nlattr *attr, struct netlink_ext_ack *extack)
{
const struct devlink_ops *ops;
const u8 *hw_addr;
int hw_addr_len;
int err;
hw_addr = nla_data(attr);
hw_addr_len = nla_len(attr);
if (hw_addr_len > MAX_ADDR_LEN) {
NL_SET_ERR_MSG_MOD(extack, "Port function hardware address too long");
return -EINVAL;
}
if (port->type == DEVLINK_PORT_TYPE_ETH) {
if (hw_addr_len != ETH_ALEN) {
NL_SET_ERR_MSG_MOD(extack, "Address must be 6 bytes for Ethernet device");
return -EINVAL;
}
if (!is_unicast_ether_addr(hw_addr)) {
NL_SET_ERR_MSG_MOD(extack, "Non-unicast hardware address unsupported");
return -EINVAL;
}
}
ops = devlink->ops;
if (!ops->port_function_hw_addr_set) {
NL_SET_ERR_MSG_MOD(extack, "Port doesn't support function attributes");
return -EOPNOTSUPP;
}
err = ops->port_function_hw_addr_set(devlink, port, hw_addr, hw_addr_len, extack);
if (err)
return err;
devlink_port_notify(port, DEVLINK_CMD_PORT_NEW);
return 0;
}
static int
devlink_port_function_set(struct devlink *devlink, struct devlink_port *port,
const struct nlattr *attr, struct netlink_ext_ack *extack)
{
struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1];
int err;
err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr,
devlink_function_nl_policy, extack);
if (err < 0) {
NL_SET_ERR_MSG_MOD(extack, "Fail to parse port function attributes");
return err;
}
attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR];
if (attr)
err = devlink_port_function_hw_addr_set(devlink, port, attr, extack);
return err;
}
static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink_port *devlink_port = info->user_ptr[1];
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;
}
if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) {
struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION];
struct netlink_ext_ack *extack = info->extack;
err = devlink_port_function_set(devlink, devlink_port, attr, extack);
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];
struct devlink_port *devlink_port;
u32 port_index;
u32 count;
if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
!info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
return -EINVAL;
devlink_port = devlink_port_get_from_info(devlink, info);
port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
if (IS_ERR(devlink_port))
return -EINVAL;
if (!devlink_port->attrs.splittable) {
if (devlink_port->attrs.split)
NL_SET_ERR_MSG_MOD(info->extack, "Port cannot be split further");
else
NL_SET_ERR_MSG_MOD(info->extack, "Port cannot be split");
return -EINVAL;
}
if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) {
NL_SET_ERR_MSG_MOD(info->extack, "Invalid split count");
return -EINVAL;
}
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;
struct sk_buff *msg;
int err;
devlink_sb = devlink_sb_get_from_info(devlink, info);
if (IS_ERR(devlink_sb))
return PTR_ERR(devlink_sb);
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;
struct sk_buff *msg;
u16 pool_index;
int err;
devlink_sb = devlink_sb_get_from_info(devlink, info);
if (IS_ERR(devlink_sb))
return PTR_ERR(devlink_sb);
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 == -EOPNOTSUPP) {
err = 0;
} else if (err) {
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];
enum devlink_sb_threshold_type threshold_type;
struct devlink_sb *devlink_sb;
u16 pool_index;
u32 size;
int err;
devlink_sb = devlink_sb_get_from_info(devlink, info);
if (IS_ERR(devlink_sb))
return PTR_ERR(devlink_sb);
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)
goto sb_occ_get_failure;
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:
err = -EMSGSIZE;
sb_occ_get_failure:
genlmsg_cancel(msg, hdr);
return err;
}
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[1];
struct devlink *devlink = devlink_port->devlink;
struct devlink_sb *devlink_sb;
struct sk_buff *msg;
u16 pool_index;
int err;
devlink_sb = devlink_sb_get_from_info(devlink, info);
if (IS_ERR(devlink_sb))
return PTR_ERR(devlink_sb);
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 == -EOPNOTSUPP) {
err = 0;
} else if (err) {
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[1];
struct devlink *devlink = info->user_ptr[0];
struct devlink_sb *devlink_sb;
u16 pool_index;
u32 threshold;
int err;
devlink_sb = devlink_sb_get_from_info(devlink, info);
if (IS_ERR(devlink_sb))
return PTR_ERR(devlink_sb);
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[1];
struct devlink *devlink = devlink_port->devlink;
struct devlink_sb *devlink_sb;
struct sk_buff *msg;
enum devlink_sb_pool_type pool_type;
u16 tc_index;
int err;
devlink_sb = devlink_sb_get_from_info(devlink, info);
if (IS_ERR(devlink_sb))
return PTR_ERR(devlink_sb);
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 == -EOPNOTSUPP) {
err = 0;
} else if (err) {
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[1];
struct devlink *devlink = info->user_ptr[0];
enum devlink_sb_pool_type pool_type;
struct devlink_sb *devlink_sb;
u16 tc_index;
u16 pool_index;
u32 threshold;
int err;
devlink_sb = devlink_sb_get_from_info(devlink, info);
if (IS_ERR(devlink_sb))
return PTR_ERR(devlink_sb);
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];
const struct devlink_ops *ops = devlink->ops;
struct devlink_sb *devlink_sb;
devlink_sb = devlink_sb_get_from_info(devlink, info);
if (IS_ERR(devlink_sb))
return PTR_ERR(devlink_sb);
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];
const struct devlink_ops *ops = devlink->ops;
struct devlink_sb *devlink_sb;
devlink_sb = devlink_sb_get_from_info(devlink, info);
if (IS_ERR(devlink_sb))
return PTR_ERR(devlink_sb);
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 *devlink)
{
struct devlink_dpipe_table *table;
list_for_each_entry_rcu(table, dpipe_tables, list,
lockdep_is_held(&devlink->lock)) {
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, devlink);
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, devlink);
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_MOD(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_MOD(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;
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(const struct devlink_ops *ops)
{
return ops->reload_down && 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 void
__devlink_reload_stats_update(struct devlink *devlink, u32 *reload_stats,
enum devlink_reload_limit limit, u32 actions_performed)
{
unsigned long actions = actions_performed;
int stat_idx;
int action;
for_each_set_bit(action, &actions, __DEVLINK_RELOAD_ACTION_MAX) {
stat_idx = limit * __DEVLINK_RELOAD_ACTION_MAX + action;
reload_stats[stat_idx]++;
}
devlink_notify(devlink, DEVLINK_CMD_NEW);
}
static void
devlink_reload_stats_update(struct devlink *devlink, enum devlink_reload_limit limit,
u32 actions_performed)
{
__devlink_reload_stats_update(devlink, devlink->stats.reload_stats, limit,
actions_performed);
}
void devlink_remote_reload_actions_performed(struct devlink *devlink,
enum devlink_reload_limit limit,
u32 actions_performed)
{
if (WARN_ON(!actions_performed ||
actions_performed & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) ||
actions_performed >= BIT(__DEVLINK_RELOAD_ACTION_MAX) ||
limit > DEVLINK_RELOAD_LIMIT_MAX))
return;
__devlink_reload_stats_update(devlink, devlink->stats.remote_reload_stats, limit,
actions_performed);
}
EXPORT_SYMBOL_GPL(devlink_remote_reload_actions_performed);
static int devlink_reload(struct devlink *devlink, struct net *dest_net,
enum devlink_reload_action action, enum devlink_reload_limit limit,
u32 *actions_performed, struct netlink_ext_ack *extack)
{
u32 remote_reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE];
int err;
if (!devlink->reload_enabled)
return -EOPNOTSUPP;
memcpy(remote_reload_stats, devlink->stats.remote_reload_stats,
sizeof(remote_reload_stats));
err = devlink->ops->reload_down(devlink, !!dest_net, action, limit, 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, action, limit, actions_performed, extack);
devlink_reload_failed_set(devlink, !!err);
if (err)
return err;
WARN_ON(!(*actions_performed & BIT(action)));
WARN_ON(memcmp(remote_reload_stats, devlink->stats.remote_reload_stats,
sizeof(remote_reload_stats)));
devlink_reload_stats_update(devlink, limit, *actions_performed);
return 0;
}
static int
devlink_nl_reload_actions_performed_snd(struct devlink *devlink, u32 actions_performed,
enum devlink_command cmd, struct genl_info *info)
{
struct sk_buff *msg;
void *hdr;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq, &devlink_nl_family, 0, cmd);
if (!hdr)
goto free_msg;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_bitfield32(msg, DEVLINK_ATTR_RELOAD_ACTIONS_PERFORMED, actions_performed,
actions_performed))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return genlmsg_reply(msg, info);
nla_put_failure:
genlmsg_cancel(msg, hdr);
free_msg:
nlmsg_free(msg);
return -EMSGSIZE;
}
static int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
enum devlink_reload_action action;
enum devlink_reload_limit limit;
struct net *dest_net = NULL;
u32 actions_performed;
int err;
if (!devlink_reload_supported(devlink->ops))
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);
}
if (info->attrs[DEVLINK_ATTR_RELOAD_ACTION])
action = nla_get_u8(info->attrs[DEVLINK_ATTR_RELOAD_ACTION]);
else
action = DEVLINK_RELOAD_ACTION_DRIVER_REINIT;
if (!devlink_reload_action_is_supported(devlink, action)) {
NL_SET_ERR_MSG_MOD(info->extack,
"Requested reload action is not supported by the driver");
return -EOPNOTSUPP;
}
limit = DEVLINK_RELOAD_LIMIT_UNSPEC;
if (info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]) {
struct nla_bitfield32 limits;
u32 limits_selected;
limits = nla_get_bitfield32(info->attrs[DEVLINK_ATTR_RELOAD_LIMITS]);
limits_selected = limits.value & limits.selector;
if (!limits_selected) {
NL_SET_ERR_MSG_MOD(info->extack, "Invalid limit selected");
return -EINVAL;
}
for (limit = 0 ; limit <= DEVLINK_RELOAD_LIMIT_MAX ; limit++)
if (limits_selected & BIT(limit))
break;
if (limits_selected != BIT(limit)) {
NL_SET_ERR_MSG_MOD(info->extack,
"Multiselection of limit is not supported");
return -EOPNOTSUPP;
}
if (!devlink_reload_limit_is_supported(devlink, limit)) {
NL_SET_ERR_MSG_MOD(info->extack,
"Requested limit is not supported by the driver");
return -EOPNOTSUPP;
}
if (devlink_reload_combination_is_invalid(action, limit)) {
NL_SET_ERR_MSG_MOD(info->extack,
"Requested limit is invalid for this action");
return -EINVAL;
}
}
err = devlink_reload(devlink, dest_net, action, limit, &actions_performed, info->extack);
if (dest_net)
put_net(dest_net);
if (err)
return err;
if (!info->attrs[DEVLINK_ATTR_RELOAD_ACTION] && !info->attrs[DEVLINK_ATTR_RELOAD_LIMITS])
return 0;
return devlink_nl_reload_actions_performed_snd(devlink, actions_performed,
DEVLINK_CMD_RELOAD, info);
}
static int devlink_nl_flash_update_fill(struct sk_buff *msg,
struct devlink *devlink,
enum devlink_command cmd,
struct devlink_flash_notify *params)
{
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 (params->status_msg &&
nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_MSG,
params->status_msg))
goto nla_put_failure;
if (params->component &&
nla_put_string(msg, DEVLINK_ATTR_FLASH_UPDATE_COMPONENT,
params->component))
goto nla_put_failure;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE,
params->done, DEVLINK_ATTR_PAD))
goto nla_put_failure;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL,
params->total, DEVLINK_ATTR_PAD))
goto nla_put_failure;
if (nla_put_u64_64bit(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TIMEOUT,
params->timeout, 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,
struct devlink_flash_notify *params)
{
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, params);
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);
}
static void devlink_flash_update_begin_notify(struct devlink *devlink)
{
struct devlink_flash_notify params = { 0 };
__devlink_flash_update_notify(devlink,
DEVLINK_CMD_FLASH_UPDATE,
¶ms);
}
static void devlink_flash_update_end_notify(struct devlink *devlink)
{
struct devlink_flash_notify params = { 0 };
__devlink_flash_update_notify(devlink,
DEVLINK_CMD_FLASH_UPDATE_END,
¶ms);
}
void devlink_flash_update_status_notify(struct devlink *devlink,
const char *status_msg,
const char *component,
unsigned long done,
unsigned long total)
{
struct devlink_flash_notify params = {
.status_msg = status_msg,
.component = component,
.done = done,
.total = total,
};
__devlink_flash_update_notify(devlink,
DEVLINK_CMD_FLASH_UPDATE_STATUS,
¶ms);
}
EXPORT_SYMBOL_GPL(devlink_flash_update_status_notify);
void devlink_flash_update_timeout_notify(struct devlink *devlink,
const char *status_msg,
const char *component,
unsigned long timeout)
{
struct devlink_flash_notify params = {
.status_msg = status_msg,
.component = component,
.timeout = timeout,
};
__devlink_flash_update_notify(devlink,
DEVLINK_CMD_FLASH_UPDATE_STATUS,
¶ms);
}
EXPORT_SYMBOL_GPL(devlink_flash_update_timeout_notify);
static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
struct genl_info *info)
{
struct nlattr *nla_component, *nla_overwrite_mask, *nla_file_name;
struct devlink_flash_update_params params = {};
struct devlink *devlink = info->user_ptr[0];
const char *file_name;
u32 supported_params;
int ret;
if (!devlink->ops->flash_update)
return -EOPNOTSUPP;
if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME])
return -EINVAL;
supported_params = devlink->ops->supported_flash_update_params;
nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT];
if (nla_component) {
if (!(supported_params & DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT)) {
NL_SET_ERR_MSG_ATTR(info->extack, nla_component,
"component update is not supported by this device");
return -EOPNOTSUPP;
}
params.component = nla_data(nla_component);
}
nla_overwrite_mask = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_OVERWRITE_MASK];
if (nla_overwrite_mask) {
struct nla_bitfield32 sections;
if (!(supported_params & DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK)) {
NL_SET_ERR_MSG_ATTR(info->extack, nla_overwrite_mask,
"overwrite settings are not supported by this device");
return -EOPNOTSUPP;
}
sections = nla_get_bitfield32(nla_overwrite_mask);
params.overwrite_mask = sections.value & sections.selector;
}
nla_file_name = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME];
file_name = nla_data(nla_file_name);
ret = request_firmware(¶ms.fw, file_name, devlink->dev);
if (ret) {
NL_SET_ERR_MSG_ATTR(info->extack, nla_file_name, "failed to locate the requested firmware file");
return ret;
}
devlink_flash_update_begin_notify(devlink);
ret = devlink->ops->flash_update(devlink, ¶ms, info->extack);
devlink_flash_update_end_notify(devlink);
release_firmware(params.fw);
return ret;
}
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,
},
{
.id = DEVLINK_PARAM_GENERIC_ID_ENABLE_ROCE,
.name = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_NAME,
.type = DEVLINK_PARAM_GENERIC_ENABLE_ROCE_TYPE,
},
{
.id = DEVLINK_PARAM_GENERIC_ID_ENABLE_REMOTE_DEV_RESET,
.name = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_NAME,
.type = DEVLINK_PARAM_GENERIC_ENABLE_REMOTE_DEV_RESET_TYPE,
},
};
static int devlink_param_generic_verify(const struct devlink_param *param)
{
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;
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, ¶m->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;
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 == -EOPNOTSUPP) {
err = 0;
} else if (err) {
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)
{
struct nlattr *param_data;
int len;
param_data = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA];
if (param->type != DEVLINK_PARAM_TYPE_BOOL && !param_data)
return -EINVAL;
switch (param->type) {
case DEVLINK_PARAM_TYPE_U8:
if (nla_len(param_data) != sizeof(u8))
return -EINVAL;
value->vu8 = nla_get_u8(param_data);
break;
case DEVLINK_PARAM_TYPE_U16:
if (nla_len(param_data) != sizeof(u16))
return -EINVAL;
value->vu16 = nla_get_u16(param_data);
break;
case DEVLINK_PARAM_TYPE_U32:
if (nla_len(param_data) != sizeof(u32))
return -EINVAL;
value->vu32 = nla_get_u32(param_data);
break;
case DEVLINK_PARAM_TYPE_STRING:
len = strnlen(nla_data(param_data), nla_len(param_data));
if (len == nla_len(param_data) ||
len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
return -EINVAL;
strcpy(value->vstr, nla_data(param_data));
break;
case DEVLINK_PARAM_TYPE_BOOL:
if (param_data && nla_len(param_data))
return -EINVAL;
value->vbool = nla_get_flag(param_data);
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, ¶m_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(¶m_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(¶m_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 == -EOPNOTSUPP) {
err = 0;
} else if (err) {
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[1];
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[1];
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, ®ion->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;
if (region->port) {
err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX,
region->port->index);
if (err)
goto nla_put_failure;
}
err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME, region->ops->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 struct sk_buff *
devlink_nl_region_notify_build(struct devlink_region *region,
struct devlink_snapshot *snapshot,
enum devlink_command cmd, u32 portid, u32 seq)
{
struct devlink *devlink = region->devlink;
struct sk_buff *msg;
void *hdr;
int err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return ERR_PTR(-ENOMEM);
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, 0, cmd);
if (!hdr) {
err = -EMSGSIZE;
goto out_free_msg;
}
err = devlink_nl_put_handle(msg, devlink);
if (err)
goto out_cancel_msg;
if (region->port) {
err = nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX,
region->port->index);
if (err)
goto out_cancel_msg;
}
err = nla_put_string(msg, DEVLINK_ATTR_REGION_NAME,
region->ops->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);
return msg;
out_cancel_msg:
genlmsg_cancel(msg, hdr);
out_free_msg:
nlmsg_free(msg);
return ERR_PTR(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;
WARN_ON(cmd != DEVLINK_CMD_REGION_NEW && cmd != DEVLINK_CMD_REGION_DEL);
msg = devlink_nl_region_notify_build(region, snapshot, cmd, 0, 0);
if (IS_ERR(msg))
return;
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
static int __devlink_snapshot_id_increment(struct devlink *devlink, u32 id)
{
unsigned long count;
void *p;
lockdep_assert_held(&devlink->lock);
p = xa_load(&devlink->snapshot_ids, id);
if (WARN_ON(!p))
return -EINVAL;
if (WARN_ON(!xa_is_value(p)))
return -EINVAL;
count = xa_to_value(p);
count++;
return xa_err(xa_store(&devlink->snapshot_ids, id, xa_mk_value(count),
GFP_KERNEL));
}
static void __devlink_snapshot_id_decrement(struct devlink *devlink, u32 id)
{
unsigned long count;
void *p;
lockdep_assert_held(&devlink->lock);
p = xa_load(&devlink->snapshot_ids, id);
if (WARN_ON(!p))
return;
if (WARN_ON(!xa_is_value(p)))
return;
count = xa_to_value(p);
if (count > 1) {
count--;
xa_store(&devlink->snapshot_ids, id, xa_mk_value(count),
GFP_KERNEL);
} else {
xa_erase(&devlink->snapshot_ids, id);
}
}
static int __devlink_snapshot_id_insert(struct devlink *devlink, u32 id)
{
lockdep_assert_held(&devlink->lock);
if (xa_load(&devlink->snapshot_ids, id))
return -EEXIST;
return xa_err(xa_store(&devlink->snapshot_ids, id, xa_mk_value(0),
GFP_KERNEL));
}
static int __devlink_region_snapshot_id_get(struct devlink *devlink, u32 *id)
{
lockdep_assert_held(&devlink->lock);
return xa_alloc(&devlink->snapshot_ids, id, xa_mk_value(1),
xa_limit_32b, GFP_KERNEL);
}
static int
__devlink_region_snapshot_create(struct devlink_region *region,
u8 *data, u32 snapshot_id)
{
struct devlink *devlink = region->devlink;
struct devlink_snapshot *snapshot;
int err;
lockdep_assert_held(&devlink->lock);
if (region->cur_snapshots == region->max_snapshots)
return -ENOSPC;
if (devlink_region_snapshot_get_by_id(region, snapshot_id))
return -EEXIST;
snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
if (!snapshot)
return -ENOMEM;
err = __devlink_snapshot_id_increment(devlink, snapshot_id);
if (err)
goto err_snapshot_id_increment;
snapshot->id = snapshot_id;
snapshot->region = region;
snapshot->data = data;
list_add_tail(&snapshot->list, ®ion->snapshot_list);
region->cur_snapshots++;
devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_NEW);
return 0;
err_snapshot_id_increment:
kfree(snapshot);
return err;
}
static void devlink_region_snapshot_del(struct devlink_region *region,
struct devlink_snapshot *snapshot)
{
struct devlink *devlink = region->devlink;
lockdep_assert_held(&devlink->lock);
devlink_nl_region_notify(region, snapshot, DEVLINK_CMD_REGION_DEL);
region->cur_snapshots--;
list_del(&snapshot->list);
region->ops->destructor(snapshot->data);
__devlink_snapshot_id_decrement(devlink, snapshot->id);
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_port *port = NULL;
struct devlink_region *region;
const char *region_name;
struct sk_buff *msg;
unsigned int index;
int err;
if (!info->attrs[DEVLINK_ATTR_REGION_NAME])
return -EINVAL;
if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
port = devlink_port_get_by_index(devlink, index);
if (!port)
return -ENODEV;
}
region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
if (port)
region = devlink_port_region_get_by_name(port, region_name);
else
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_port_dumpit(struct sk_buff *msg,
struct netlink_callback *cb,
struct devlink_port *port,
int *idx,
int start)
{
struct devlink_region *region;
int err = 0;
list_for_each_entry(region, &port->region_list, list) {
if (*idx < start) {
(*idx)++;
continue;
}
err = devlink_nl_region_fill(msg, port->devlink,
DEVLINK_CMD_REGION_GET,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NLM_F_MULTI, region);
if (err)
goto out;
(*idx)++;
}
out:
return err;
}
static int devlink_nl_cmd_region_get_devlink_dumpit(struct sk_buff *msg,
struct netlink_callback *cb,
struct devlink *devlink,
int *idx,
int start)
{
struct devlink_region *region;
struct devlink_port *port;
int err = 0;
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)
goto out;
(*idx)++;
}
list_for_each_entry(port, &devlink->port_list, list) {
err = devlink_nl_cmd_region_get_port_dumpit(msg, cb, port, idx,
start);
if (err)
goto out;
}
out:
mutex_unlock(&devlink->lock);
return err;
}
static int devlink_nl_cmd_region_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;
err = devlink_nl_cmd_region_get_devlink_dumpit(msg, cb, devlink,
&idx, start);
if (err)
goto out;
}
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_port *port = NULL;
struct devlink_region *region;
const char *region_name;
unsigned int index;
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]);
if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
port = devlink_port_get_by_index(devlink, index);
if (!port)
return -ENODEV;
}
if (port)
region = devlink_port_region_get_by_name(port, region_name);
else
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_new(struct sk_buff *skb, struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_snapshot *snapshot;
struct devlink_port *port = NULL;
struct nlattr *snapshot_id_attr;
struct devlink_region *region;
const char *region_name;
unsigned int index;
u32 snapshot_id;
u8 *data;
int err;
if (!info->attrs[DEVLINK_ATTR_REGION_NAME]) {
NL_SET_ERR_MSG_MOD(info->extack, "No region name provided");
return -EINVAL;
}
region_name = nla_data(info->attrs[DEVLINK_ATTR_REGION_NAME]);
if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
port = devlink_port_get_by_index(devlink, index);
if (!port)
return -ENODEV;
}
if (port)
region = devlink_port_region_get_by_name(port, region_name);
else
region = devlink_region_get_by_name(devlink, region_name);
if (!region) {
NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not exist");
return -EINVAL;
}
if (!region->ops->snapshot) {
NL_SET_ERR_MSG_MOD(info->extack, "The requested region does not support taking an immediate snapshot");
return -EOPNOTSUPP;
}
if (region->cur_snapshots == region->max_snapshots) {
NL_SET_ERR_MSG_MOD(info->extack, "The region has reached the maximum number of stored snapshots");
return -ENOSPC;
}
snapshot_id_attr = info->attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID];
if (snapshot_id_attr) {
snapshot_id = nla_get_u32(snapshot_id_attr);
if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
NL_SET_ERR_MSG_MOD(info->extack, "The requested snapshot id is already in use");
return -EEXIST;
}
err = __devlink_snapshot_id_insert(devlink, snapshot_id);
if (err)
return err;
} else {
err = __devlink_region_snapshot_id_get(devlink, &snapshot_id);
if (err) {
NL_SET_ERR_MSG_MOD(info->extack, "Failed to allocate a new snapshot id");
return err;
}
}
if (port)
err = region->port_ops->snapshot(port, region->port_ops,
info->extack, &data);
else
err = region->ops->snapshot(devlink, region->ops,
info->extack, &data);
if (err)
goto err_snapshot_capture;
err = __devlink_region_snapshot_create(region, data, snapshot_id);
if (err)
goto err_snapshot_create;
if (!snapshot_id_attr) {
struct sk_buff *msg;
snapshot = devlink_region_snapshot_get_by_id(region,
snapshot_id);
if (WARN_ON(!snapshot))
return -EINVAL;
msg = devlink_nl_region_notify_build(region, snapshot,
DEVLINK_CMD_REGION_NEW,
info->snd_portid,
info->snd_seq);
err = PTR_ERR_OR_ZERO(msg);
if (err)
goto err_notify;
err = genlmsg_reply(msg, info);
if (err)
goto err_notify;
}
return 0;
err_snapshot_create:
region->ops->destructor(data);
err_snapshot_capture:
__devlink_snapshot_id_decrement(devlink, snapshot_id);
return err;
err_notify:
devlink_region_snapshot_del(region, snapshot);
return err;
}
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,
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;
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 = U64_MAX;
struct nlattr **attrs = info->attrs;
struct devlink_port *port = NULL;
struct devlink_region *region;
struct nlattr *chunks_attr;
const char *region_name;
struct devlink *devlink;
unsigned int index;
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;
}
if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) {
index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
port = devlink_port_get_by_index(devlink, index);
if (!port) {
err = -ENODEV;
goto out_unlock;
}
}
region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]);
if (port)
region = devlink_port_region_get_by_name(port, region_name);
else
region = devlink_region_get_by_name(devlink, region_name);
if (!region) {
err = -EINVAL;
goto out_unlock;
}
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]);
}
if (end_offset > region->size)
end_offset = region->size;
if (start_offset == end_offset) {
err = 0;
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;
if (region->port) {
err = nla_put_u32(skb, DEVLINK_ATTR_PORT_INDEX,
region->port->index);
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;
}
err = devlink_nl_region_read_snapshot_fill(skb, devlink,
region, attrs,
start_offset,
end_offset, &ret_offset);
if (err && err != -EMSGSIZE)
goto nla_put_failure;
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);
int devlink_info_board_serial_number_put(struct devlink_info_req *req,
const char *bsn)
{
return nla_put_string(req->msg, DEVLINK_ATTR_INFO_BOARD_SERIAL_NUMBER,
bsn);
}
EXPORT_SYMBOL_GPL(devlink_info_board_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 == -EOPNOTSUPP)
err = 0;
else if (err)
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[];
};
struct devlink_fmsg {
struct list_head item_list;
bool putting_binary;
};
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)
{
if (fmsg->putting_binary)
return -EINVAL;
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)
{
if (fmsg->putting_binary)
return -EINVAL;
return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
}
int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
{
if (fmsg->putting_binary)
return -EINVAL;
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 (fmsg->putting_binary)
return -EINVAL;
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;
if (fmsg->putting_binary)
return -EINVAL;
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)
{
if (fmsg->putting_binary)
return -EINVAL;
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;
if (fmsg->putting_binary)
return -EINVAL;
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;
if (fmsg->putting_binary)
return -EINVAL;
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);
int devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg *fmsg,
const char *name)
{
int err;
err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
if (err)
return err;
fmsg->putting_binary = true;
return err;
}
EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_start);
int devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg *fmsg)
{
if (!fmsg->putting_binary)
return -EINVAL;
fmsg->putting_binary = false;
return devlink_fmsg_arr_pair_nest_end(fmsg);
}
EXPORT_SYMBOL_GPL(devlink_fmsg_binary_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)
{
if (fmsg->putting_binary)
return -EINVAL;
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)
{
if (fmsg->putting_binary)
return -EINVAL;
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)
{
if (fmsg->putting_binary)
return -EINVAL;
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)
{
if (fmsg->putting_binary)
return -EINVAL;
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)
{
if (fmsg->putting_binary)
return -EINVAL;
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)
{
if (!fmsg->putting_binary)
return -EINVAL;
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, u32 value_len)
{
u32 data_size;
int end_err;
u32 offset;
int err;
err = devlink_fmsg_binary_pair_nest_start(fmsg, name);
if (err)
return err;
for (offset = 0; offset < value_len; offset += data_size) {
data_size = value_len - offset;
if (data_size > DEVLINK_FMSG_MAX_SIZE)
data_size = DEVLINK_FMSG_MAX_SIZE;
err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
if (err)
break;
}
end_err = devlink_fmsg_binary_pair_nest_end(fmsg);
if (end_err)
err = end_err;
return err;
}
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:
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_port *devlink_port;
struct devlink_fmsg *dump_fmsg;
struct mutex dump_lock;
u64 graceful_period;
bool auto_recover;
bool auto_dump;
u8 health_state;
u64 dump_ts;
u64 dump_real_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 list_head *reporter_list,
struct mutex *list_lock,
const char *reporter_name)
{
struct devlink_health_reporter *reporter;
lockdep_assert_held(list_lock);
list_for_each_entry(reporter, reporter_list, list)
if (!strcmp(reporter->ops->name, reporter_name))
return reporter;
return NULL;
}
static struct devlink_health_reporter *
devlink_health_reporter_find_by_name(struct devlink *devlink,
const char *reporter_name)
{
return __devlink_health_reporter_find_by_name(&devlink->reporter_list,
&devlink->reporters_lock,
reporter_name);
}
static struct devlink_health_reporter *
devlink_port_health_reporter_find_by_name(struct devlink_port *devlink_port,
const char *reporter_name)
{
return __devlink_health_reporter_find_by_name(&devlink_port->reporter_list,
&devlink_port->reporters_lock,
reporter_name);
}
static struct devlink_health_reporter *
__devlink_health_reporter_create(struct devlink *devlink,
const struct devlink_health_reporter_ops *ops,
u64 graceful_period, void *priv)
{
struct devlink_health_reporter *reporter;
if (WARN_ON(graceful_period && !ops->recover))
return ERR_PTR(-EINVAL);
reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
if (!reporter)
return ERR_PTR(-ENOMEM);
reporter->priv = priv;
reporter->ops = ops;
reporter->devlink = devlink;
reporter->graceful_period = graceful_period;
reporter->auto_recover = !!ops->recover;
reporter->auto_dump = !!ops->dump;
mutex_init(&reporter->dump_lock);
refcount_set(&reporter->refcount, 1);
return reporter;
}
struct devlink_health_reporter *
devlink_port_health_reporter_create(struct devlink_port *port,
const struct devlink_health_reporter_ops *ops,
u64 graceful_period, void *priv)
{
struct devlink_health_reporter *reporter;
mutex_lock(&port->reporters_lock);
if (__devlink_health_reporter_find_by_name(&port->reporter_list,
&port->reporters_lock, ops->name)) {
reporter = ERR_PTR(-EEXIST);
goto unlock;
}
reporter = __devlink_health_reporter_create(port->devlink, ops,
graceful_period, priv);
if (IS_ERR(reporter))
goto unlock;
reporter->devlink_port = port;
list_add_tail(&reporter->list, &port->reporter_list);
unlock:
mutex_unlock(&port->reporters_lock);
return reporter;
}
EXPORT_SYMBOL_GPL(devlink_port_health_reporter_create);
struct devlink_health_reporter *
devlink_health_reporter_create(struct devlink *devlink,
const struct devlink_health_reporter_ops *ops,
u64 graceful_period, 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;
}
reporter = __devlink_health_reporter_create(devlink, ops,
graceful_period, priv);
if (IS_ERR(reporter))
goto unlock;
list_add_tail(&reporter->list, &devlink->reporter_list);
unlock:
mutex_unlock(&devlink->reporters_lock);
return reporter;
}
EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
static void
devlink_health_reporter_free(struct devlink_health_reporter *reporter)
{
mutex_destroy(&reporter->dump_lock);
if (reporter->dump_fmsg)
devlink_fmsg_free(reporter->dump_fmsg);
kfree(reporter);
}
static void
devlink_health_reporter_put(struct devlink_health_reporter *reporter)
{
if (refcount_dec_and_test(&reporter->refcount))
devlink_health_reporter_free(reporter);
}
static void
__devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
{
list_del(&reporter->list);
devlink_health_reporter_put(reporter);
}
void
devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
{
struct mutex *lock = &reporter->devlink->reporters_lock;
mutex_lock(lock);
__devlink_health_reporter_destroy(reporter);
mutex_unlock(lock);
}
EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
void
devlink_port_health_reporter_destroy(struct devlink_health_reporter *reporter)
{
struct mutex *lock = &reporter->devlink_port->reporters_lock;
mutex_lock(lock);
__devlink_health_reporter_destroy(reporter);
mutex_unlock(lock);
}
EXPORT_SYMBOL_GPL(devlink_port_health_reporter_destroy);
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;
if (reporter->devlink_port) {
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, reporter->devlink_port->index))
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;
if (reporter->dump_fmsg &&
nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS_NS,
reporter->dump_real_ts, DEVLINK_ATTR_PAD))
goto reporter_nest_cancel;
if (reporter->ops->dump &&
nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP,
reporter->auto_dump))
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 void devlink_recover_notify(struct devlink_health_reporter *reporter,
enum devlink_command cmd)
{
struct sk_buff *msg;
int err;
WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_health_reporter_fill(msg, reporter->devlink,
reporter, cmd, 0, 0, 0);
if (err) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(&devlink_nl_family,
devlink_net(reporter->devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
void
devlink_health_reporter_recovery_done(struct devlink_health_reporter *reporter)
{
reporter->recovery_count++;
reporter->last_recovery_ts = jiffies;
}
EXPORT_SYMBOL_GPL(devlink_health_reporter_recovery_done);
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;
devlink_health_reporter_recovery_done(reporter);
reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
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;
reporter->dump_real_ts = ktime_get_real_ns();
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;
unsigned long recover_ts_threshold;
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;
devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
recover_ts_threshold = reporter->last_recovery_ts +
msecs_to_jiffies(reporter->graceful_period);
if (reporter->auto_recover &&
(prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
(reporter->last_recovery_ts && reporter->recovery_count &&
time_is_after_jiffies(recover_ts_threshold)))) {
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;
if (reporter->auto_dump) {
mutex_lock(&reporter->dump_lock);
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;
struct devlink_port *devlink_port;
char *reporter_name;
if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
return NULL;
reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
devlink_port = devlink_port_get_from_attrs(devlink, attrs);
if (IS_ERR(devlink_port)) {
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);
} else {
mutex_lock(&devlink_port->reporters_lock);
reporter = devlink_port_health_reporter_find_by_name(devlink_port, reporter_name);
if (reporter)
refcount_inc(&reporter->refcount);
mutex_unlock(&devlink_port->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;
}
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);
devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
}
EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
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_port *port;
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);
}
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(port, &devlink->port_list, list) {
mutex_lock(&port->reporters_lock);
list_for_each_entry(reporter, &port->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(&port->reporters_lock);
mutex_unlock(&devlink->lock);
goto out;
}
idx++;
}
mutex_unlock(&port->reporters_lock);
}
mutex_unlock(&devlink->