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linux-next/net/devlink/dev.c
Johannes Berg a885a6b2d3 net: convert to nla_get_*_default() 
Most of the original conversion is from the spatch below,
but I edited some and left out other instances that were
either buggy after conversion (where default values don't
fit into the type) or just looked strange.

    @@
    expression attr, def;
    expression val;
    identifier fn =~ "^nla_get_.*";
    fresh identifier dfn = fn ## "_default";
    @@
    (
    -if (attr)
    -  val = fn(attr);
    -else
    -  val = def;
    +val = dfn(attr, def);
    |
    -if (!attr)
    -  val = def;
    -else
    -  val = fn(attr);
    +val = dfn(attr, def);
    |
    -if (!attr)
    -  return def;
    -return fn(attr);
    +return dfn(attr, def);
    |
    -attr ? fn(attr) : def
    +dfn(attr, def)
    |
    -!attr ? def : fn(attr)
    +dfn(attr, def)
    )

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Toke Høiland-Jørgensen <toke@kernel.org>
Link: https://patch.msgid.link/20241108114145.0580b8684e7f.I740beeaa2f70ebfc19bfca1045a24d6151992790@changeid
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-11-11 10:32:06 -08:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2016 Mellanox Technologies. All rights reserved.
* Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
*/
#include <linux/device.h>
#include <net/genetlink.h>
#include <net/sock.h>
#include "devl_internal.h"
struct devlink_info_req {
struct sk_buff *msg;
void (*version_cb)(const char *version_name,
enum devlink_info_version_type version_type,
void *version_cb_priv);
void *version_cb_priv;
};
struct devlink_reload_combination {
enum devlink_reload_action action;
enum devlink_reload_limit limit;
};
static const struct devlink_reload_combination devlink_reload_invalid_combinations[] = {
{
/* can't reinitialize driver with no down time */
.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++) {
/* Remote stats are shown even if not locally supported.
* Stats of actions with unspecified limit are shown
* though drivers don't need to register unspecified
* limit.
*/
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_nested_fill(struct sk_buff *msg, struct devlink *devlink)
{
unsigned long rel_index;
void *unused;
int err;
xa_for_each(&devlink->nested_rels, rel_index, unused) {
err = devlink_rel_devlink_handle_put(msg, devlink,
rel_index,
DEVLINK_ATTR_NESTED_DEVLINK,
NULL);
if (err)
return err;
}
return 0;
}
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);
if (devlink_nl_nested_fill(msg, devlink))
goto nla_put_failure;
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);
WARN_ON(!devl_is_registered(devlink));
if (!devlink_nl_notify_need(devlink))
return;
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;
}
devlink_nl_notify_send(devlink, msg);
}
int devlink_nl_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_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
struct netlink_callback *cb, int flags)
{
return devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, flags);
}
int devlink_nl_get_dumpit(struct sk_buff *msg, struct netlink_callback *cb)
{
return devlink_nl_dumpit(msg, cb, devlink_nl_get_dump_one);
}
static void devlink_rel_notify_cb(struct devlink *devlink, u32 obj_index)
{
devlink_notify(devlink, DEVLINK_CMD_NEW);
}
static void devlink_rel_cleanup_cb(struct devlink *devlink, u32 obj_index,
u32 rel_index)
{
xa_erase(&devlink->nested_rels, rel_index);
}
int devl_nested_devlink_set(struct devlink *devlink,
struct devlink *nested_devlink)
{
u32 rel_index;
int err;
err = devlink_rel_nested_in_add(&rel_index, devlink->index, 0,
devlink_rel_notify_cb,
devlink_rel_cleanup_cb,
nested_devlink);
if (err)
return err;
return xa_insert(&devlink->nested_rels, rel_index,
xa_mk_value(0), GFP_KERNEL);
}
EXPORT_SYMBOL_GPL(devl_nested_devlink_set);
void devlink_notify_register(struct devlink *devlink)
{
devlink_notify(devlink, DEVLINK_CMD_NEW);
devlink_linecards_notify_register(devlink);
devlink_ports_notify_register(devlink);
devlink_trap_policers_notify_register(devlink);
devlink_trap_groups_notify_register(devlink);
devlink_traps_notify_register(devlink);
devlink_rates_notify_register(devlink);
devlink_regions_notify_register(devlink);
devlink_params_notify_register(devlink);
}
void devlink_notify_unregister(struct devlink *devlink)
{
devlink_params_notify_unregister(devlink);
devlink_regions_notify_unregister(devlink);
devlink_rates_notify_unregister(devlink);
devlink_traps_notify_unregister(devlink);
devlink_trap_groups_notify_unregister(devlink);
devlink_trap_policers_notify_unregister(devlink);
devlink_ports_notify_unregister(devlink);
devlink_linecards_notify_unregister(devlink);
devlink_notify(devlink, DEVLINK_CMD_DEL);
}
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);
}
/**
* devlink_remote_reload_actions_performed - Update devlink on reload actions
* performed which are not a direct result of devlink reload call.
*
* This should be called by a driver after performing reload actions in case it was not
* a result of devlink reload call. For example fw_activate was performed as a result
* of devlink reload triggered fw_activate on another host.
* The motivation for this function is to keep data on reload actions performed on this
* function whether it was done due to direct devlink reload call or not.
*
* @devlink: devlink
* @limit: reload limit
* @actions_performed: bitmask of 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 struct net *devlink_netns_get(struct sk_buff *skb,
struct genl_info *info)
{
struct nlattr *netns_pid_attr = info->attrs[DEVLINK_ATTR_NETNS_PID];
struct nlattr *netns_fd_attr = info->attrs[DEVLINK_ATTR_NETNS_FD];
struct nlattr *netns_id_attr = info->attrs[DEVLINK_ATTR_NETNS_ID];
struct net *net;
if (!!netns_pid_attr + !!netns_fd_attr + !!netns_id_attr > 1) {
NL_SET_ERR_MSG(info->extack, "multiple netns identifying attributes specified");
return ERR_PTR(-EINVAL);
}
if (netns_pid_attr) {
net = get_net_ns_by_pid(nla_get_u32(netns_pid_attr));
} else if (netns_fd_attr) {
net = get_net_ns_by_fd(nla_get_u32(netns_fd_attr));
} else if (netns_id_attr) {
net = get_net_ns_by_id(sock_net(skb->sk),
nla_get_u32(netns_id_attr));
if (!net)
net = ERR_PTR(-EINVAL);
} else {
WARN_ON(1);
net = ERR_PTR(-EINVAL);
}
if (IS_ERR(net)) {
NL_SET_ERR_MSG(info->extack, "Unknown network namespace");
return ERR_PTR(-EINVAL);
}
if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) {
put_net(net);
return ERR_PTR(-EPERM);
}
return net;
}
static void devlink_reload_netns_change(struct devlink *devlink,
struct net *curr_net,
struct net *dest_net)
{
/* Userspace needs to be notified about devlink objects
* removed from original and entering new network namespace.
* The rest of the devlink objects are re-created during
* reload process so the notifications are generated separatelly.
*/
devlink_notify_unregister(devlink);
write_pnet(&devlink->_net, dest_net);
devlink_notify_register(devlink);
devlink_rel_nested_in_notify(devlink);
}
static void devlink_reload_reinit_sanity_check(struct devlink *devlink)
{
WARN_ON(!list_empty(&devlink->trap_policer_list));
WARN_ON(!list_empty(&devlink->trap_group_list));
WARN_ON(!list_empty(&devlink->trap_list));
WARN_ON(!list_empty(&devlink->dpipe_table_list));
WARN_ON(!list_empty(&devlink->sb_list));
WARN_ON(!list_empty(&devlink->rate_list));
WARN_ON(!list_empty(&devlink->linecard_list));
WARN_ON(!xa_empty(&devlink->ports));
}
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];
struct net *curr_net;
int err;
/* Make sure the reload operations are invoked with the device lock
* held to allow drivers to trigger functionality that expects it
* (e.g., PCI reset) and to close possible races between these
* operations and probe/remove.
*/
device_lock_assert(devlink->dev);
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;
curr_net = devlink_net(devlink);
if (dest_net && !net_eq(dest_net, curr_net))
devlink_reload_netns_change(devlink, curr_net, dest_net);
if (action == DEVLINK_RELOAD_ACTION_DRIVER_REINIT) {
devlink_params_driverinit_load_new(devlink);
devlink_reload_reinit_sanity_check(devlink);
}
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)));
/* Catch driver on updating the remote action within devlink reload */
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;
}
int devlink_nl_reload_doit(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;
err = devlink_resources_validate(devlink, NULL, info);
if (err) {
NL_SET_ERR_MSG(info->extack, "resources size validation failed");
return err;
}
action = nla_get_u8_default(info->attrs[DEVLINK_ATTR_RELOAD_ACTION],
DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
if (!devlink_reload_action_is_supported(devlink, action)) {
NL_SET_ERR_MSG(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(info->extack, "Invalid limit selected");
return -EINVAL;
}
for (limit = 0 ; limit <= DEVLINK_RELOAD_LIMIT_MAX ; limit++)
if (limits_selected & BIT(limit))
break;
/* UAPI enables multiselection, but currently it is not used */
if (limits_selected != BIT(limit)) {
NL_SET_ERR_MSG(info->extack, "Multiselection of limit is not supported");
return -EOPNOTSUPP;
}
if (!devlink_reload_limit_is_supported(devlink, limit)) {
NL_SET_ERR_MSG(info->extack, "Requested limit is not supported by the driver");
return -EOPNOTSUPP;
}
if (devlink_reload_combination_is_invalid(action, limit)) {
NL_SET_ERR_MSG(info->extack, "Requested limit is invalid for this action");
return -EINVAL;
}
}
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 (!net_eq(dest_net, devlink_net(devlink)) &&
action != DEVLINK_RELOAD_ACTION_DRIVER_REINIT) {
NL_SET_ERR_MSG_MOD(info->extack,
"Changing namespace is only supported for reinit action");
return -EOPNOTSUPP;
}
}
err = devlink_reload(devlink, dest_net, action, limit, &actions_performed, info->extack);
if (dest_net)
put_net(dest_net);
if (err)
return err;
/* For backward compatibility generate reply only if attributes used by user */
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);
}
bool devlink_reload_actions_valid(const struct devlink_ops *ops)
{
const struct devlink_reload_combination *comb;
int i;
if (!devlink_reload_supported(ops)) {
if (WARN_ON(ops->reload_actions))
return false;
return true;
}
if (WARN_ON(!ops->reload_actions ||
ops->reload_actions & BIT(DEVLINK_RELOAD_ACTION_UNSPEC) ||
ops->reload_actions >= BIT(__DEVLINK_RELOAD_ACTION_MAX)))
return false;
if (WARN_ON(ops->reload_limits & BIT(DEVLINK_RELOAD_LIMIT_UNSPEC) ||
ops->reload_limits >= BIT(__DEVLINK_RELOAD_LIMIT_MAX)))
return false;
for (i = 0; i < ARRAY_SIZE(devlink_reload_invalid_combinations); i++) {
comb = &devlink_reload_invalid_combinations[i];
if (ops->reload_actions == BIT(comb->action) &&
ops->reload_limits == BIT(comb->limit))
return false;
}
return true;
}
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;
}
int devlink_nl_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);
}
int devlink_nl_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 = devlink_rate_nodes_check(devlink, mode, info->extack);
if (err)
return err;
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_info_serial_number_put(struct devlink_info_req *req, const char *sn)
{
if (!req->msg)
return 0;
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)
{
if (!req->msg)
return 0;
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,
enum devlink_info_version_type version_type)
{
struct nlattr *nest;
int err;
if (req->version_cb)
req->version_cb(version_name, version_type,
req->version_cb_priv);
if (!req->msg)
return 0;
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,
DEVLINK_INFO_VERSION_TYPE_NONE);
}
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,
DEVLINK_INFO_VERSION_TYPE_NONE);
}
EXPORT_SYMBOL_GPL(devlink_info_version_stored_put);
int devlink_info_version_stored_put_ext(struct devlink_info_req *req,
const char *version_name,
const char *version_value,
enum devlink_info_version_type version_type)
{
return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_STORED,
version_name, version_value,
version_type);
}
EXPORT_SYMBOL_GPL(devlink_info_version_stored_put_ext);
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,
DEVLINK_INFO_VERSION_TYPE_NONE);
}
EXPORT_SYMBOL_GPL(devlink_info_version_running_put);
int devlink_info_version_running_put_ext(struct devlink_info_req *req,
const char *version_name,
const char *version_value,
enum devlink_info_version_type version_type)
{
return devlink_info_version_put(req, DEVLINK_ATTR_INFO_VERSION_RUNNING,
version_name, version_value,
version_type);
}
EXPORT_SYMBOL_GPL(devlink_info_version_running_put_ext);
static int devlink_nl_driver_info_get(struct device_driver *drv,
struct devlink_info_req *req)
{
if (!drv)
return 0;
if (drv->name[0])
return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME,
drv->name);
return 0;
}
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 device *dev = devlink_to_dev(devlink);
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;
if (devlink->ops->info_get) {
err = devlink->ops->info_get(devlink, &req, extack);
if (err)
goto err_cancel_msg;
}
err = devlink_nl_driver_info_get(dev->driver, &req);
if (err)
goto err_cancel_msg;
genlmsg_end(msg, hdr);
return 0;
err_cancel_msg:
genlmsg_cancel(msg, hdr);
return err;
}
int devlink_nl_info_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_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_info_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
struct netlink_callback *cb, int flags)
{
int err;
err = devlink_nl_info_fill(msg, devlink, DEVLINK_CMD_INFO_GET,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, flags,
cb->extack);
if (err == -EOPNOTSUPP)
err = 0;
return err;
}
int devlink_nl_info_get_dumpit(struct sk_buff *msg, struct netlink_callback *cb)
{
return devlink_nl_dumpit(msg, cb, devlink_nl_info_get_dump_one);
}
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 (devlink_nl_put_u64(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_DONE,
params->done))
goto nla_put_failure;
if (devlink_nl_put_u64(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TOTAL,
params->total))
goto nla_put_failure;
if (devlink_nl_put_u64(msg, DEVLINK_ATTR_FLASH_UPDATE_STATUS_TIMEOUT,
params->timeout))
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);
if (!devl_is_registered(devlink) || !devlink_nl_notify_need(devlink))
return;
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;
devlink_nl_notify_send(devlink, msg);
return;
out_free_msg:
nlmsg_free(msg);
}
static void devlink_flash_update_begin_notify(struct devlink *devlink)
{
struct devlink_flash_notify params = {};
__devlink_flash_update_notify(devlink,
DEVLINK_CMD_FLASH_UPDATE,
&params);
}
static void devlink_flash_update_end_notify(struct devlink *devlink)
{
struct devlink_flash_notify params = {};
__devlink_flash_update_notify(devlink,
DEVLINK_CMD_FLASH_UPDATE_END,
&params);
}
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,
&params);
}
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,
&params);
}
EXPORT_SYMBOL_GPL(devlink_flash_update_timeout_notify);
struct devlink_flash_component_lookup_ctx {
const char *lookup_name;
bool lookup_name_found;
};
static void
devlink_flash_component_lookup_cb(const char *version_name,
enum devlink_info_version_type version_type,
void *version_cb_priv)
{
struct devlink_flash_component_lookup_ctx *lookup_ctx = version_cb_priv;
if (version_type != DEVLINK_INFO_VERSION_TYPE_COMPONENT ||
lookup_ctx->lookup_name_found)
return;
lookup_ctx->lookup_name_found =
!strcmp(lookup_ctx->lookup_name, version_name);
}
static int devlink_flash_component_get(struct devlink *devlink,
struct nlattr *nla_component,
const char **p_component,
struct netlink_ext_ack *extack)
{
struct devlink_flash_component_lookup_ctx lookup_ctx = {};
struct devlink_info_req req = {};
const char *component;
int ret;
if (!nla_component)
return 0;
component = nla_data(nla_component);
if (!devlink->ops->info_get) {
NL_SET_ERR_MSG_ATTR(extack, nla_component,
"component update is not supported by this device");
return -EOPNOTSUPP;
}
lookup_ctx.lookup_name = component;
req.version_cb = devlink_flash_component_lookup_cb;
req.version_cb_priv = &lookup_ctx;
ret = devlink->ops->info_get(devlink, &req, NULL);
if (ret)
return ret;
if (!lookup_ctx.lookup_name_found) {
NL_SET_ERR_MSG_ATTR(extack, nla_component,
"selected component is not supported by this device");
return -EINVAL;
}
*p_component = component;
return 0;
}
int devlink_nl_flash_update_doit(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *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 (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME))
return -EINVAL;
ret = devlink_flash_component_get(devlink,
info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT],
&params.component, info->extack);
if (ret)
return ret;
supported_params = devlink->ops->supported_flash_update_params;
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(&params.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, &params, info->extack);
devlink_flash_update_end_notify(devlink);
release_firmware(params.fw);
return ret;
}
static void __devlink_compat_running_version(struct devlink *devlink,
char *buf, size_t len)
{
struct devlink_info_req req = {};
const struct nlattr *nlattr;
struct sk_buff *msg;
int rem, err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
req.msg = msg;
err = devlink->ops->info_get(devlink, &req, NULL);
if (err)
goto free_msg;
nla_for_each_attr_type(nlattr, DEVLINK_ATTR_INFO_VERSION_RUNNING,
(void *)msg->data, msg->len, rem) {
const struct nlattr *kv;
int rem_kv;
nla_for_each_nested_type(kv, DEVLINK_ATTR_INFO_VERSION_VALUE,
nlattr, rem_kv) {
strlcat(buf, nla_data(kv), len);
strlcat(buf, " ", len);
}
}
free_msg:
nlmsg_consume(msg);
}
void devlink_compat_running_version(struct devlink *devlink,
char *buf, size_t len)
{
if (!devlink->ops->info_get)
return;
devl_lock(devlink);
if (devl_is_registered(devlink))
__devlink_compat_running_version(devlink, buf, len);
devl_unlock(devlink);
}
int devlink_compat_flash_update(struct devlink *devlink, const char *file_name)
{
struct devlink_flash_update_params params = {};
int ret;
devl_lock(devlink);
if (!devl_is_registered(devlink)) {
ret = -ENODEV;
goto out_unlock;
}
if (!devlink->ops->flash_update) {
ret = -EOPNOTSUPP;
goto out_unlock;
}
ret = request_firmware(&params.fw, file_name, devlink->dev);
if (ret)
goto out_unlock;
devlink_flash_update_begin_notify(devlink);
ret = devlink->ops->flash_update(devlink, &params, NULL);
devlink_flash_update_end_notify(devlink);
release_firmware(params.fw);
out_unlock:
devl_unlock(devlink);
return ret;
}
static int
devlink_nl_selftests_fill(struct sk_buff *msg, struct devlink *devlink,
u32 portid, u32 seq, int flags,
struct netlink_ext_ack *extack)
{
struct nlattr *selftests;
void *hdr;
int err;
int i;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags,
DEVLINK_CMD_SELFTESTS_GET);
if (!hdr)
return -EMSGSIZE;
err = -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto err_cancel_msg;
selftests = nla_nest_start(msg, DEVLINK_ATTR_SELFTESTS);
if (!selftests)
goto err_cancel_msg;
for (i = DEVLINK_ATTR_SELFTEST_ID_UNSPEC + 1;
i <= DEVLINK_ATTR_SELFTEST_ID_MAX; i++) {
if (devlink->ops->selftest_check(devlink, i, extack)) {
err = nla_put_flag(msg, i);
if (err)
goto err_cancel_msg;
}
}
nla_nest_end(msg, selftests);
genlmsg_end(msg, hdr);
return 0;
err_cancel_msg:
genlmsg_cancel(msg, hdr);
return err;
}
int devlink_nl_selftests_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->selftest_check)
return -EOPNOTSUPP;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_selftests_fill(msg, devlink, 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_selftests_get_dump_one(struct sk_buff *msg,
struct devlink *devlink,
struct netlink_callback *cb,
int flags)
{
if (!devlink->ops->selftest_check)
return 0;
return devlink_nl_selftests_fill(msg, devlink,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, flags,
cb->extack);
}
int devlink_nl_selftests_get_dumpit(struct sk_buff *skb,
struct netlink_callback *cb)
{
return devlink_nl_dumpit(skb, cb, devlink_nl_selftests_get_dump_one);
}
static int devlink_selftest_result_put(struct sk_buff *skb, unsigned int id,
enum devlink_selftest_status test_status)
{
struct nlattr *result_attr;
result_attr = nla_nest_start(skb, DEVLINK_ATTR_SELFTEST_RESULT);
if (!result_attr)
return -EMSGSIZE;
if (nla_put_u32(skb, DEVLINK_ATTR_SELFTEST_RESULT_ID, id) ||
nla_put_u8(skb, DEVLINK_ATTR_SELFTEST_RESULT_STATUS,
test_status))
goto nla_put_failure;
nla_nest_end(skb, result_attr);
return 0;
nla_put_failure:
nla_nest_cancel(skb, result_attr);
return -EMSGSIZE;
}
static const struct nla_policy devlink_selftest_nl_policy[DEVLINK_ATTR_SELFTEST_ID_MAX + 1] = {
[DEVLINK_ATTR_SELFTEST_ID_FLASH] = { .type = NLA_FLAG },
};
int devlink_nl_selftests_run_doit(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *tb[DEVLINK_ATTR_SELFTEST_ID_MAX + 1];
struct devlink *devlink = info->user_ptr[0];
struct nlattr *attrs, *selftests;
struct sk_buff *msg;
void *hdr;
int err;
int i;
if (!devlink->ops->selftest_run || !devlink->ops->selftest_check)
return -EOPNOTSUPP;
if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_SELFTESTS))
return -EINVAL;
attrs = info->attrs[DEVLINK_ATTR_SELFTESTS];
err = nla_parse_nested(tb, DEVLINK_ATTR_SELFTEST_ID_MAX, attrs,
devlink_selftest_nl_policy, info->extack);
if (err < 0)
return err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = -EMSGSIZE;
hdr = genlmsg_put(msg, info->snd_portid, info->snd_seq,
&devlink_nl_family, 0, DEVLINK_CMD_SELFTESTS_RUN);
if (!hdr)
goto free_msg;
if (devlink_nl_put_handle(msg, devlink))
goto genlmsg_cancel;
selftests = nla_nest_start(msg, DEVLINK_ATTR_SELFTESTS);
if (!selftests)
goto genlmsg_cancel;
for (i = DEVLINK_ATTR_SELFTEST_ID_UNSPEC + 1;
i <= DEVLINK_ATTR_SELFTEST_ID_MAX; i++) {
enum devlink_selftest_status test_status;
if (nla_get_flag(tb[i])) {
if (!devlink->ops->selftest_check(devlink, i,
info->extack)) {
if (devlink_selftest_result_put(msg, i,
DEVLINK_SELFTEST_STATUS_SKIP))
goto selftests_nest_cancel;
continue;
}
test_status = devlink->ops->selftest_run(devlink, i,
info->extack);
if (devlink_selftest_result_put(msg, i, test_status))
goto selftests_nest_cancel;
}
}
nla_nest_end(msg, selftests);
genlmsg_end(msg, hdr);
return genlmsg_reply(msg, info);
selftests_nest_cancel:
nla_nest_cancel(msg, selftests);
genlmsg_cancel:
genlmsg_cancel(msg, hdr);
free_msg:
nlmsg_free(msg);
return err;
}
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