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devlink: Notify users when objects are accessible
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The devlink core code notified users about add/remove objects without
relation if this object can be accessible or not. In this patch we unify
such user visible notifications in one place.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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rleon authored and davem330 committed Sep 27, 2021
1 parent ef5d635 commit cf53021
Showing 1 changed file with 93 additions and 14 deletions.
107 changes: 93 additions & 14 deletions net/core/devlink.c
Original file line number Diff line number Diff line change
@@ -742,6 +742,7 @@ static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
int err;

WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED));

msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
@@ -1040,11 +1041,15 @@ static int devlink_nl_port_fill(struct sk_buff *msg,
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;

WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);

if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
return;

msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
@@ -1055,18 +1060,19 @@ static void devlink_port_notify(struct devlink_port *devlink_port,
return;
}

genlmsg_multicast_netns(&devlink_nl_family,
devlink_net(devlink_port->devlink), msg, 0,
DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg,
0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}

static void devlink_rate_notify(struct devlink_rate *devlink_rate,
enum devlink_command cmd)
{
struct devlink *devlink = devlink_rate->devlink;
struct sk_buff *msg;
int err;

WARN_ON(cmd != DEVLINK_CMD_RATE_NEW && cmd != DEVLINK_CMD_RATE_DEL);
WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED));

msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
@@ -1078,9 +1084,8 @@ static void devlink_rate_notify(struct devlink_rate *devlink_rate,
return;
}

genlmsg_multicast_netns(&devlink_nl_family,
devlink_net(devlink_rate->devlink), msg, 0,
DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg,
0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}

static int devlink_nl_cmd_rate_get_dumpit(struct sk_buff *msg,
@@ -4150,6 +4155,7 @@ static void __devlink_flash_update_notify(struct devlink *devlink,
WARN_ON(cmd != DEVLINK_CMD_FLASH_UPDATE &&
cmd != DEVLINK_CMD_FLASH_UPDATE_END &&
cmd != DEVLINK_CMD_FLASH_UPDATE_STATUS);
WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED));

msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
@@ -5145,17 +5151,18 @@ 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);
WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED));

msg = devlink_nl_region_notify_build(region, snapshot, cmd, 0, 0);
if (IS_ERR(msg))
return;

genlmsg_multicast_netns(&devlink_nl_family,
devlink_net(region->devlink), msg, 0,
DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg,
0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}

/**
@@ -6920,10 +6927,12 @@ devlink_nl_health_reporter_fill(struct sk_buff *msg,
static void devlink_recover_notify(struct devlink_health_reporter *reporter,
enum devlink_command cmd)
{
struct devlink *devlink = reporter->devlink;
struct sk_buff *msg;
int err;

WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED));

msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
@@ -6935,9 +6944,8 @@ static void devlink_recover_notify(struct devlink_health_reporter *reporter,
return;
}

genlmsg_multicast_netns(&devlink_nl_family,
devlink_net(reporter->devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg,
0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}

void
@@ -8955,6 +8963,68 @@ struct devlink *devlink_alloc_ns(const struct devlink_ops *ops,
}
EXPORT_SYMBOL_GPL(devlink_alloc_ns);

static void
devlink_trap_policer_notify(struct devlink *devlink,
const struct devlink_trap_policer_item *policer_item,
enum devlink_command cmd);
static void
devlink_trap_group_notify(struct devlink *devlink,
const struct devlink_trap_group_item *group_item,
enum devlink_command cmd);
static void devlink_trap_notify(struct devlink *devlink,
const struct devlink_trap_item *trap_item,
enum devlink_command cmd);

static void devlink_notify_register(struct devlink *devlink)
{
struct devlink_trap_policer_item *policer_item;
struct devlink_trap_group_item *group_item;
struct devlink_trap_item *trap_item;
struct devlink_port *devlink_port;

devlink_notify(devlink, DEVLINK_CMD_NEW);
list_for_each_entry(devlink_port, &devlink->port_list, list)
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);

list_for_each_entry(policer_item, &devlink->trap_policer_list, list)
devlink_trap_policer_notify(devlink, policer_item,
DEVLINK_CMD_TRAP_POLICER_NEW);

list_for_each_entry(group_item, &devlink->trap_group_list, list)
devlink_trap_group_notify(devlink, group_item,
DEVLINK_CMD_TRAP_GROUP_NEW);

list_for_each_entry(trap_item, &devlink->trap_list, list)
devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_NEW);

devlink_params_publish(devlink);
}

static void devlink_notify_unregister(struct devlink *devlink)
{
struct devlink_trap_policer_item *policer_item;
struct devlink_trap_group_item *group_item;
struct devlink_trap_item *trap_item;
struct devlink_port *devlink_port;

devlink_params_unpublish(devlink);

list_for_each_entry_reverse(trap_item, &devlink->trap_list, list)
devlink_trap_notify(devlink, trap_item, DEVLINK_CMD_TRAP_DEL);

list_for_each_entry_reverse(group_item, &devlink->trap_group_list, list)
devlink_trap_group_notify(devlink, group_item,
DEVLINK_CMD_TRAP_GROUP_DEL);
list_for_each_entry_reverse(policer_item, &devlink->trap_policer_list,
list)
devlink_trap_policer_notify(devlink, policer_item,
DEVLINK_CMD_TRAP_POLICER_DEL);

list_for_each_entry_reverse(devlink_port, &devlink->port_list, list)
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
devlink_notify(devlink, DEVLINK_CMD_DEL);
}

/**
* devlink_register - Register devlink instance
*
@@ -8964,7 +9034,7 @@ void devlink_register(struct devlink *devlink)
{
mutex_lock(&devlink_mutex);
xa_set_mark(&devlinks, devlink->index, DEVLINK_REGISTERED);
devlink_notify(devlink, DEVLINK_CMD_NEW);
devlink_notify_register(devlink);
mutex_unlock(&devlink_mutex);
}
EXPORT_SYMBOL_GPL(devlink_register);
@@ -8982,7 +9052,7 @@ void devlink_unregister(struct devlink *devlink)
mutex_lock(&devlink_mutex);
WARN_ON(devlink_reload_supported(devlink->ops) &&
devlink->reload_enabled);
devlink_notify(devlink, DEVLINK_CMD_DEL);
devlink_notify_unregister(devlink);
xa_clear_mark(&devlinks, devlink->index, DEVLINK_REGISTERED);
mutex_unlock(&devlink_mutex);
}
@@ -10086,6 +10156,9 @@ void devlink_params_publish(struct devlink *devlink)
{
struct devlink_param_item *param_item;

if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
return;

list_for_each_entry(param_item, &devlink->param_list, list) {
if (param_item->published)
continue;
@@ -10631,6 +10704,8 @@ devlink_trap_group_notify(struct devlink *devlink,

WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_GROUP_NEW &&
cmd != DEVLINK_CMD_TRAP_GROUP_DEL);
if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
return;

msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
@@ -10672,6 +10747,8 @@ static void devlink_trap_notify(struct devlink *devlink,

WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_NEW &&
cmd != DEVLINK_CMD_TRAP_DEL);
if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
return;

msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
@@ -11053,6 +11130,8 @@ devlink_trap_policer_notify(struct devlink *devlink,

WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_POLICER_NEW &&
cmd != DEVLINK_CMD_TRAP_POLICER_DEL);
if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
return;

msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)

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