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devlink: push linecard related code into separate file 

Cut out another chunk from leftover.c and put linecard related code
into a separate file.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230828061657.300667-13-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jiri Pirko 2023-08-28 08:16:54 +02:00 committed by Jakub Kicinski
parent 7cc7194e85
commit 9edbe6f36c
4 changed files with 626 additions and 615 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/devlink/Makefile
View File

@ -1,4 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
obj-y := leftover.o core.o netlink.o netlink_gen.o dev.o port.o sb.o dpipe.o \
resource.o param.o region.o health.o trap.o rate.o
resource.o param.o region.o health.o trap.o rate.o linecard.o

34
net/devlink/devl_internal.h
View File

@ -168,6 +168,8 @@ void devlink_traps_notify_register(struct devlink *devlink);
void devlink_traps_notify_unregister(struct devlink *devlink);
void devlink_rates_notify_register(struct devlink *devlink);
void devlink_rates_notify_unregister(struct devlink *devlink);
void devlink_linecards_notify_register(struct devlink *devlink);
void devlink_linecards_notify_unregister(struct devlink *devlink);
/* Ports */
#define ASSERT_DEVLINK_PORT_INITIALIZED(devlink_port) \
@ -182,21 +184,6 @@ devlink_port_get_from_info(struct devlink *devlink, struct genl_info *info);
struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
struct nlattr **attrs);
/* Linecards */
struct devlink_linecard {
struct list_head list;
struct devlink *devlink;
unsigned int index;
const struct devlink_linecard_ops *ops;
void *priv;
enum devlink_linecard_state state;
struct mutex state_lock; /* Protects state */
const char *type;
struct devlink_linecard_type *types;
unsigned int types_count;
struct devlink *nested_devlink;
};
/* Reload */
bool devlink_reload_actions_valid(const struct devlink_ops *ops);
int devlink_reload(struct devlink *devlink, struct net *dest_net,
@ -222,6 +209,21 @@ int devlink_resources_validate(struct devlink *devlink,
int devlink_rate_nodes_check(struct devlink *devlink, u16 mode,
struct netlink_ext_ack *extack);
/* Linecards */
struct devlink_linecard {
struct list_head list;
struct devlink *devlink;
unsigned int index;
const struct devlink_linecard_ops *ops;
void *priv;
enum devlink_linecard_state state;
struct mutex state_lock; /* Protects state */
const char *type;
struct devlink_linecard_type *types;
unsigned int types_count;
struct devlink *nested_devlink;
};
/* Devlink nl cmds */
int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb, struct genl_info *info);
@ -283,3 +285,5 @@ int devlink_nl_cmd_trap_policer_set_doit(struct sk_buff *skb,
int devlink_nl_cmd_rate_set_doit(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_cmd_rate_new_doit(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_cmd_rate_del_doit(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_cmd_linecard_set_doit(struct sk_buff *skb,
struct genl_info *info);

599
net/devlink/leftover.c
View File

@ -37,396 +37,6 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwmsg);
EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_hwerr);
EXPORT_TRACEPOINT_SYMBOL_GPL(devlink_trap_report);
static struct devlink_linecard *
devlink_linecard_get_by_index(struct devlink *devlink,
unsigned int linecard_index)
{
struct devlink_linecard *devlink_linecard;
list_for_each_entry(devlink_linecard, &devlink->linecard_list, list) {
if (devlink_linecard->index == linecard_index)
return devlink_linecard;
}
return NULL;
}
static bool devlink_linecard_index_exists(struct devlink *devlink,
unsigned int linecard_index)
{
return devlink_linecard_get_by_index(devlink, linecard_index);
}
static struct devlink_linecard *
devlink_linecard_get_from_attrs(struct devlink *devlink, struct nlattr **attrs)
{
if (attrs[DEVLINK_ATTR_LINECARD_INDEX]) {
u32 linecard_index = nla_get_u32(attrs[DEVLINK_ATTR_LINECARD_INDEX]);
struct devlink_linecard *linecard;
linecard = devlink_linecard_get_by_index(devlink, linecard_index);
if (!linecard)
return ERR_PTR(-ENODEV);
return linecard;
}
return ERR_PTR(-EINVAL);
}
static struct devlink_linecard *
devlink_linecard_get_from_info(struct devlink *devlink, struct genl_info *info)
{
return devlink_linecard_get_from_attrs(devlink, info->attrs);
}
static int devlink_nl_put_nested_handle(struct sk_buff *msg, struct devlink *devlink)
{
struct nlattr *nested_attr;
nested_attr = nla_nest_start(msg, DEVLINK_ATTR_NESTED_DEVLINK);
if (!nested_attr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
nla_nest_end(msg, nested_attr);
return 0;
nla_put_failure:
nla_nest_cancel(msg, nested_attr);
return -EMSGSIZE;
}
struct devlink_linecard_type {
const char *type;
const void *priv;
};
static int devlink_nl_linecard_fill(struct sk_buff *msg,
struct devlink *devlink,
struct devlink_linecard *linecard,
enum devlink_command cmd, u32 portid,
u32 seq, int flags,
struct netlink_ext_ack *extack)
{
struct devlink_linecard_type *linecard_type;
struct nlattr *attr;
void *hdr;
int i;
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_LINECARD_INDEX, linecard->index))
goto nla_put_failure;
if (nla_put_u8(msg, DEVLINK_ATTR_LINECARD_STATE, linecard->state))
goto nla_put_failure;
if (linecard->type &&
nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE, linecard->type))
goto nla_put_failure;
if (linecard->types_count) {
attr = nla_nest_start(msg,
DEVLINK_ATTR_LINECARD_SUPPORTED_TYPES);
if (!attr)
goto nla_put_failure;
for (i = 0; i < linecard->types_count; i++) {
linecard_type = &linecard->types[i];
if (nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE,
linecard_type->type)) {
nla_nest_cancel(msg, attr);
goto nla_put_failure;
}
}
nla_nest_end(msg, attr);
}
if (linecard->nested_devlink &&
devlink_nl_put_nested_handle(msg, linecard->nested_devlink))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static void devlink_linecard_notify(struct devlink_linecard *linecard,
enum devlink_command cmd)
{
struct devlink *devlink = linecard->devlink;
struct sk_buff *msg;
int err;
WARN_ON(cmd != DEVLINK_CMD_LINECARD_NEW &&
cmd != DEVLINK_CMD_LINECARD_DEL);
if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
return;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_linecard_fill(msg, devlink, linecard, 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 void devlink_linecards_notify_register(struct devlink *devlink)
{
struct devlink_linecard *linecard;
list_for_each_entry(linecard, &devlink->linecard_list, list)
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
}
static void devlink_linecards_notify_unregister(struct devlink *devlink)
{
struct devlink_linecard *linecard;
list_for_each_entry_reverse(linecard, &devlink->linecard_list, list)
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL);
}
int devlink_nl_linecard_get_doit(struct sk_buff *skb, struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_linecard *linecard;
struct sk_buff *msg;
int err;
linecard = devlink_linecard_get_from_info(devlink, info);
if (IS_ERR(linecard))
return PTR_ERR(linecard);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
mutex_lock(&linecard->state_lock);
err = devlink_nl_linecard_fill(msg, devlink, linecard,
DEVLINK_CMD_LINECARD_NEW,
info->snd_portid, info->snd_seq, 0,
info->extack);
mutex_unlock(&linecard->state_lock);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int devlink_nl_linecard_get_dump_one(struct sk_buff *msg,
struct devlink *devlink,
struct netlink_callback *cb,
int flags)
{
struct devlink_nl_dump_state *state = devlink_dump_state(cb);
struct devlink_linecard *linecard;
int idx = 0;
int err = 0;
list_for_each_entry(linecard, &devlink->linecard_list, list) {
if (idx < state->idx) {
idx++;
continue;
}
mutex_lock(&linecard->state_lock);
err = devlink_nl_linecard_fill(msg, devlink, linecard,
DEVLINK_CMD_LINECARD_NEW,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, flags,
cb->extack);
mutex_unlock(&linecard->state_lock);
if (err) {
state->idx = idx;
break;
}
idx++;
}
return err;
}
int devlink_nl_linecard_get_dumpit(struct sk_buff *skb,
struct netlink_callback *cb)
{
return devlink_nl_dumpit(skb, cb, devlink_nl_linecard_get_dump_one);
}
static struct devlink_linecard_type *
devlink_linecard_type_lookup(struct devlink_linecard *linecard,
const char *type)
{
struct devlink_linecard_type *linecard_type;
int i;
for (i = 0; i < linecard->types_count; i++) {
linecard_type = &linecard->types[i];
if (!strcmp(type, linecard_type->type))
return linecard_type;
}
return NULL;
}
static int devlink_linecard_type_set(struct devlink_linecard *linecard,
const char *type,
struct netlink_ext_ack *extack)
{
const struct devlink_linecard_ops *ops = linecard->ops;
struct devlink_linecard_type *linecard_type;
int err;
mutex_lock(&linecard->state_lock);
if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) {
NL_SET_ERR_MSG(extack, "Line card is currently being provisioned");
err = -EBUSY;
goto out;
}
if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) {
NL_SET_ERR_MSG(extack, "Line card is currently being unprovisioned");
err = -EBUSY;
goto out;
}
linecard_type = devlink_linecard_type_lookup(linecard, type);
if (!linecard_type) {
NL_SET_ERR_MSG(extack, "Unsupported line card type provided");
err = -EINVAL;
goto out;
}
if (linecard->state != DEVLINK_LINECARD_STATE_UNPROVISIONED &&
linecard->state != DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) {
NL_SET_ERR_MSG(extack, "Line card already provisioned");
err = -EBUSY;
/* Check if the line card is provisioned in the same
* way the user asks. In case it is, make the operation
* to return success.
*/
if (ops->same_provision &&
ops->same_provision(linecard, linecard->priv,
linecard_type->type,
linecard_type->priv))
err = 0;
goto out;
}
linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING;
linecard->type = linecard_type->type;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
err = ops->provision(linecard, linecard->priv, linecard_type->type,
linecard_type->priv, extack);
if (err) {
/* Provisioning failed. Assume the linecard is unprovisioned
* for future operations.
*/
mutex_lock(&linecard->state_lock);
linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
linecard->type = NULL;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
return err;
out:
mutex_unlock(&linecard->state_lock);
return err;
}
static int devlink_linecard_type_unset(struct devlink_linecard *linecard,
struct netlink_ext_ack *extack)
{
int err;
mutex_lock(&linecard->state_lock);
if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) {
NL_SET_ERR_MSG(extack, "Line card is currently being provisioned");
err = -EBUSY;
goto out;
}
if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) {
NL_SET_ERR_MSG(extack, "Line card is currently being unprovisioned");
err = -EBUSY;
goto out;
}
if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) {
linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
linecard->type = NULL;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
err = 0;
goto out;
}
if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONED) {
NL_SET_ERR_MSG(extack, "Line card is not provisioned");
err = 0;
goto out;
}
linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONING;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
err = linecard->ops->unprovision(linecard, linecard->priv,
extack);
if (err) {
/* Unprovisioning failed. Assume the linecard is unprovisioned
* for future operations.
*/
mutex_lock(&linecard->state_lock);
linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
linecard->type = NULL;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
return err;
out:
mutex_unlock(&linecard->state_lock);
return err;
}
static int devlink_nl_cmd_linecard_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct netlink_ext_ack *extack = info->extack;
struct devlink *devlink = info->user_ptr[0];
struct devlink_linecard *linecard;
int err;
linecard = devlink_linecard_get_from_info(devlink, info);
if (IS_ERR(linecard))
return PTR_ERR(linecard);
if (info->attrs[DEVLINK_ATTR_LINECARD_TYPE]) {
const char *type;
type = nla_data(info->attrs[DEVLINK_ATTR_LINECARD_TYPE]);
if (strcmp(type, "")) {
err = devlink_linecard_type_set(linecard, type, extack);
if (err)
return err;
} else {
err = devlink_linecard_type_unset(linecard, extack);
if (err)
return err;
}
}
return 0;
}
const struct genl_small_ops devlink_nl_small_ops[40] = {
{
.cmd = DEVLINK_CMD_PORT_SET,
@ -703,212 +313,3 @@ void devlink_notify_unregister(struct devlink *devlink)
devlink_linecards_notify_unregister(devlink);
devlink_notify(devlink, DEVLINK_CMD_DEL);
}
static int devlink_linecard_types_init(struct devlink_linecard *linecard)
{
struct devlink_linecard_type *linecard_type;
unsigned int count;
int i;
count = linecard->ops->types_count(linecard, linecard->priv);
linecard->types = kmalloc_array(count, sizeof(*linecard_type),
GFP_KERNEL);
if (!linecard->types)
return -ENOMEM;
linecard->types_count = count;
for (i = 0; i < count; i++) {
linecard_type = &linecard->types[i];
linecard->ops->types_get(linecard, linecard->priv, i,
&linecard_type->type,
&linecard_type->priv);
}
return 0;
}
static void devlink_linecard_types_fini(struct devlink_linecard *linecard)
{
kfree(linecard->types);
}
/**
* devl_linecard_create - Create devlink linecard
*
* @devlink: devlink
* @linecard_index: driver-specific numerical identifier of the linecard
* @ops: linecards ops
* @priv: user priv pointer
*
* Create devlink linecard instance with provided linecard index.
* Caller can use any indexing, even hw-related one.
*
* Return: Line card structure or an ERR_PTR() encoded error code.
*/
struct devlink_linecard *
devl_linecard_create(struct devlink *devlink, unsigned int linecard_index,
const struct devlink_linecard_ops *ops, void *priv)
{
struct devlink_linecard *linecard;
int err;
if (WARN_ON(!ops || !ops->provision || !ops->unprovision ||
!ops->types_count || !ops->types_get))
return ERR_PTR(-EINVAL);
if (devlink_linecard_index_exists(devlink, linecard_index))
return ERR_PTR(-EEXIST);
linecard = kzalloc(sizeof(*linecard), GFP_KERNEL);
if (!linecard)
return ERR_PTR(-ENOMEM);
linecard->devlink = devlink;
linecard->index = linecard_index;
linecard->ops = ops;
linecard->priv = priv;
linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
mutex_init(&linecard->state_lock);
err = devlink_linecard_types_init(linecard);
if (err) {
mutex_destroy(&linecard->state_lock);
kfree(linecard);
return ERR_PTR(err);
}
list_add_tail(&linecard->list, &devlink->linecard_list);
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
return linecard;
}
EXPORT_SYMBOL_GPL(devl_linecard_create);
/**
* devl_linecard_destroy - Destroy devlink linecard
*
* @linecard: devlink linecard
*/
void devl_linecard_destroy(struct devlink_linecard *linecard)
{
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL);
list_del(&linecard->list);
devlink_linecard_types_fini(linecard);
mutex_destroy(&linecard->state_lock);
kfree(linecard);
}
EXPORT_SYMBOL_GPL(devl_linecard_destroy);
/**
* devlink_linecard_provision_set - Set provisioning on linecard
*
* @linecard: devlink linecard
* @type: linecard type
*
* This is either called directly from the provision() op call or
* as a result of the provision() op call asynchronously.
*/
void devlink_linecard_provision_set(struct devlink_linecard *linecard,
const char *type)
{
mutex_lock(&linecard->state_lock);
WARN_ON(linecard->type && strcmp(linecard->type, type));
linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED;
linecard->type = type;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
EXPORT_SYMBOL_GPL(devlink_linecard_provision_set);
/**
* devlink_linecard_provision_clear - Clear provisioning on linecard
*
* @linecard: devlink linecard
*
* This is either called directly from the unprovision() op call or
* as a result of the unprovision() op call asynchronously.
*/
void devlink_linecard_provision_clear(struct devlink_linecard *linecard)
{
mutex_lock(&linecard->state_lock);
WARN_ON(linecard->nested_devlink);
linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
linecard->type = NULL;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
EXPORT_SYMBOL_GPL(devlink_linecard_provision_clear);
/**
* devlink_linecard_provision_fail - Fail provisioning on linecard
*
* @linecard: devlink linecard
*
* This is either called directly from the provision() op call or
* as a result of the provision() op call asynchronously.
*/
void devlink_linecard_provision_fail(struct devlink_linecard *linecard)
{
mutex_lock(&linecard->state_lock);
WARN_ON(linecard->nested_devlink);
linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING_FAILED;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
EXPORT_SYMBOL_GPL(devlink_linecard_provision_fail);
/**
* devlink_linecard_activate - Set linecard active
*
* @linecard: devlink linecard
*/
void devlink_linecard_activate(struct devlink_linecard *linecard)
{
mutex_lock(&linecard->state_lock);
WARN_ON(linecard->state != DEVLINK_LINECARD_STATE_PROVISIONED);
linecard->state = DEVLINK_LINECARD_STATE_ACTIVE;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
EXPORT_SYMBOL_GPL(devlink_linecard_activate);
/**
* devlink_linecard_deactivate - Set linecard inactive
*
* @linecard: devlink linecard
*/
void devlink_linecard_deactivate(struct devlink_linecard *linecard)
{
mutex_lock(&linecard->state_lock);
switch (linecard->state) {
case DEVLINK_LINECARD_STATE_ACTIVE:
linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
break;
case DEVLINK_LINECARD_STATE_UNPROVISIONING:
/* Line card is being deactivated as part
* of unprovisioning flow.
*/
break;
default:
WARN_ON(1);
break;
}
mutex_unlock(&linecard->state_lock);
}
EXPORT_SYMBOL_GPL(devlink_linecard_deactivate);
/**
* devlink_linecard_nested_dl_set - Attach/detach nested devlink
* instance to linecard.
*
* @linecard: devlink linecard
* @nested_devlink: devlink instance to attach or NULL to detach
*/
void devlink_linecard_nested_dl_set(struct devlink_linecard *linecard,
struct devlink *nested_devlink)
{
mutex_lock(&linecard->state_lock);
linecard->nested_devlink = nested_devlink;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
EXPORT_SYMBOL_GPL(devlink_linecard_nested_dl_set);

606
net/devlink/linecard.c Normal file
View File

@ -0,0 +1,606 @@
// 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 "devl_internal.h"
static struct devlink_linecard *
devlink_linecard_get_by_index(struct devlink *devlink,
unsigned int linecard_index)
{
struct devlink_linecard *devlink_linecard;
list_for_each_entry(devlink_linecard, &devlink->linecard_list, list) {
if (devlink_linecard->index == linecard_index)
return devlink_linecard;
}
return NULL;
}
static bool devlink_linecard_index_exists(struct devlink *devlink,
unsigned int linecard_index)
{
return devlink_linecard_get_by_index(devlink, linecard_index);
}
static struct devlink_linecard *
devlink_linecard_get_from_attrs(struct devlink *devlink, struct nlattr **attrs)
{
if (attrs[DEVLINK_ATTR_LINECARD_INDEX]) {
u32 linecard_index = nla_get_u32(attrs[DEVLINK_ATTR_LINECARD_INDEX]);
struct devlink_linecard *linecard;
linecard = devlink_linecard_get_by_index(devlink, linecard_index);
if (!linecard)
return ERR_PTR(-ENODEV);
return linecard;
}
return ERR_PTR(-EINVAL);
}
static struct devlink_linecard *
devlink_linecard_get_from_info(struct devlink *devlink, struct genl_info *info)
{
return devlink_linecard_get_from_attrs(devlink, info->attrs);
}
static int devlink_nl_put_nested_handle(struct sk_buff *msg, struct devlink *devlink)
{
struct nlattr *nested_attr;
nested_attr = nla_nest_start(msg, DEVLINK_ATTR_NESTED_DEVLINK);
if (!nested_attr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
nla_nest_end(msg, nested_attr);
return 0;
nla_put_failure:
nla_nest_cancel(msg, nested_attr);
return -EMSGSIZE;
}
struct devlink_linecard_type {
const char *type;
const void *priv;
};
static int devlink_nl_linecard_fill(struct sk_buff *msg,
struct devlink *devlink,
struct devlink_linecard *linecard,
enum devlink_command cmd, u32 portid,
u32 seq, int flags,
struct netlink_ext_ack *extack)
{
struct devlink_linecard_type *linecard_type;
struct nlattr *attr;
void *hdr;
int i;
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_LINECARD_INDEX, linecard->index))
goto nla_put_failure;
if (nla_put_u8(msg, DEVLINK_ATTR_LINECARD_STATE, linecard->state))
goto nla_put_failure;
if (linecard->type &&
nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE, linecard->type))
goto nla_put_failure;
if (linecard->types_count) {
attr = nla_nest_start(msg,
DEVLINK_ATTR_LINECARD_SUPPORTED_TYPES);
if (!attr)
goto nla_put_failure;
for (i = 0; i < linecard->types_count; i++) {
linecard_type = &linecard->types[i];
if (nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE,
linecard_type->type)) {
nla_nest_cancel(msg, attr);
goto nla_put_failure;
}
}
nla_nest_end(msg, attr);
}
if (linecard->nested_devlink &&
devlink_nl_put_nested_handle(msg, linecard->nested_devlink))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static void devlink_linecard_notify(struct devlink_linecard *linecard,
enum devlink_command cmd)
{
struct devlink *devlink = linecard->devlink;
struct sk_buff *msg;
int err;
WARN_ON(cmd != DEVLINK_CMD_LINECARD_NEW &&
cmd != DEVLINK_CMD_LINECARD_DEL);
if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
return;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_linecard_fill(msg, devlink, linecard, 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);
}
void devlink_linecards_notify_register(struct devlink *devlink)
{
struct devlink_linecard *linecard;
list_for_each_entry(linecard, &devlink->linecard_list, list)
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
}
void devlink_linecards_notify_unregister(struct devlink *devlink)
{
struct devlink_linecard *linecard;
list_for_each_entry_reverse(linecard, &devlink->linecard_list, list)
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL);
}
int devlink_nl_linecard_get_doit(struct sk_buff *skb, struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_linecard *linecard;
struct sk_buff *msg;
int err;
linecard = devlink_linecard_get_from_info(devlink, info);
if (IS_ERR(linecard))
return PTR_ERR(linecard);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
mutex_lock(&linecard->state_lock);
err = devlink_nl_linecard_fill(msg, devlink, linecard,
DEVLINK_CMD_LINECARD_NEW,
info->snd_portid, info->snd_seq, 0,
info->extack);
mutex_unlock(&linecard->state_lock);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int devlink_nl_linecard_get_dump_one(struct sk_buff *msg,
struct devlink *devlink,
struct netlink_callback *cb,
int flags)
{
struct devlink_nl_dump_state *state = devlink_dump_state(cb);
struct devlink_linecard *linecard;
int idx = 0;
int err = 0;
list_for_each_entry(linecard, &devlink->linecard_list, list) {
if (idx < state->idx) {
idx++;
continue;
}
mutex_lock(&linecard->state_lock);
err = devlink_nl_linecard_fill(msg, devlink, linecard,
DEVLINK_CMD_LINECARD_NEW,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, flags,
cb->extack);
mutex_unlock(&linecard->state_lock);
if (err) {
state->idx = idx;
break;
}
idx++;
}
return err;
}
int devlink_nl_linecard_get_dumpit(struct sk_buff *skb,
struct netlink_callback *cb)
{
return devlink_nl_dumpit(skb, cb, devlink_nl_linecard_get_dump_one);
}
static struct devlink_linecard_type *
devlink_linecard_type_lookup(struct devlink_linecard *linecard,
const char *type)
{
struct devlink_linecard_type *linecard_type;
int i;
for (i = 0; i < linecard->types_count; i++) {
linecard_type = &linecard->types[i];
if (!strcmp(type, linecard_type->type))
return linecard_type;
}
return NULL;
}
static int devlink_linecard_type_set(struct devlink_linecard *linecard,
const char *type,
struct netlink_ext_ack *extack)
{
const struct devlink_linecard_ops *ops = linecard->ops;
struct devlink_linecard_type *linecard_type;
int err;
mutex_lock(&linecard->state_lock);
if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) {
NL_SET_ERR_MSG(extack, "Line card is currently being provisioned");
err = -EBUSY;
goto out;
}
if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) {
NL_SET_ERR_MSG(extack, "Line card is currently being unprovisioned");
err = -EBUSY;
goto out;
}
linecard_type = devlink_linecard_type_lookup(linecard, type);
if (!linecard_type) {
NL_SET_ERR_MSG(extack, "Unsupported line card type provided");
err = -EINVAL;
goto out;
}
if (linecard->state != DEVLINK_LINECARD_STATE_UNPROVISIONED &&
linecard->state != DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) {
NL_SET_ERR_MSG(extack, "Line card already provisioned");
err = -EBUSY;
/* Check if the line card is provisioned in the same
* way the user asks. In case it is, make the operation
* to return success.
*/
if (ops->same_provision &&
ops->same_provision(linecard, linecard->priv,
linecard_type->type,
linecard_type->priv))
err = 0;
goto out;
}
linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING;
linecard->type = linecard_type->type;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
err = ops->provision(linecard, linecard->priv, linecard_type->type,
linecard_type->priv, extack);
if (err) {
/* Provisioning failed. Assume the linecard is unprovisioned
* for future operations.
*/
mutex_lock(&linecard->state_lock);
linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
linecard->type = NULL;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
return err;
out:
mutex_unlock(&linecard->state_lock);
return err;
}
static int devlink_linecard_type_unset(struct devlink_linecard *linecard,
struct netlink_ext_ack *extack)
{
int err;
mutex_lock(&linecard->state_lock);
if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) {
NL_SET_ERR_MSG(extack, "Line card is currently being provisioned");
err = -EBUSY;
goto out;
}
if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) {
NL_SET_ERR_MSG(extack, "Line card is currently being unprovisioned");
err = -EBUSY;
goto out;
}
if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING_FAILED) {
linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
linecard->type = NULL;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
err = 0;
goto out;
}
if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONED) {
NL_SET_ERR_MSG(extack, "Line card is not provisioned");
err = 0;
goto out;
}
linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONING;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
err = linecard->ops->unprovision(linecard, linecard->priv,
extack);
if (err) {
/* Unprovisioning failed. Assume the linecard is unprovisioned
* for future operations.
*/
mutex_lock(&linecard->state_lock);
linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
linecard->type = NULL;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
return err;
out:
mutex_unlock(&linecard->state_lock);
return err;
}
int devlink_nl_cmd_linecard_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct netlink_ext_ack *extack = info->extack;
struct devlink *devlink = info->user_ptr[0];
struct devlink_linecard *linecard;
int err;
linecard = devlink_linecard_get_from_info(devlink, info);
if (IS_ERR(linecard))
return PTR_ERR(linecard);
if (info->attrs[DEVLINK_ATTR_LINECARD_TYPE]) {
const char *type;
type = nla_data(info->attrs[DEVLINK_ATTR_LINECARD_TYPE]);
if (strcmp(type, "")) {
err = devlink_linecard_type_set(linecard, type, extack);
if (err)
return err;
} else {
err = devlink_linecard_type_unset(linecard, extack);
if (err)
return err;
}
}
return 0;
}
static int devlink_linecard_types_init(struct devlink_linecard *linecard)
{
struct devlink_linecard_type *linecard_type;
unsigned int count;
int i;
count = linecard->ops->types_count(linecard, linecard->priv);
linecard->types = kmalloc_array(count, sizeof(*linecard_type),
GFP_KERNEL);
if (!linecard->types)
return -ENOMEM;
linecard->types_count = count;
for (i = 0; i < count; i++) {
linecard_type = &linecard->types[i];
linecard->ops->types_get(linecard, linecard->priv, i,
&linecard_type->type,
&linecard_type->priv);
}
return 0;
}
static void devlink_linecard_types_fini(struct devlink_linecard *linecard)
{
kfree(linecard->types);
}
/**
* devl_linecard_create - Create devlink linecard
*
* @devlink: devlink
* @linecard_index: driver-specific numerical identifier of the linecard
* @ops: linecards ops
* @priv: user priv pointer
*
* Create devlink linecard instance with provided linecard index.
* Caller can use any indexing, even hw-related one.
*
* Return: Line card structure or an ERR_PTR() encoded error code.
*/
struct devlink_linecard *
devl_linecard_create(struct devlink *devlink, unsigned int linecard_index,
const struct devlink_linecard_ops *ops, void *priv)
{
struct devlink_linecard *linecard;
int err;
if (WARN_ON(!ops || !ops->provision || !ops->unprovision ||
!ops->types_count || !ops->types_get))
return ERR_PTR(-EINVAL);
if (devlink_linecard_index_exists(devlink, linecard_index))
return ERR_PTR(-EEXIST);
linecard = kzalloc(sizeof(*linecard), GFP_KERNEL);
if (!linecard)
return ERR_PTR(-ENOMEM);
linecard->devlink = devlink;
linecard->index = linecard_index;
linecard->ops = ops;
linecard->priv = priv;
linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
mutex_init(&linecard->state_lock);
err = devlink_linecard_types_init(linecard);
if (err) {
mutex_destroy(&linecard->state_lock);
kfree(linecard);
return ERR_PTR(err);
}
list_add_tail(&linecard->list, &devlink->linecard_list);
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
return linecard;
}
EXPORT_SYMBOL_GPL(devl_linecard_create);
/**
* devl_linecard_destroy - Destroy devlink linecard
*
* @linecard: devlink linecard
*/
void devl_linecard_destroy(struct devlink_linecard *linecard)
{
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_DEL);
list_del(&linecard->list);
devlink_linecard_types_fini(linecard);
mutex_destroy(&linecard->state_lock);
kfree(linecard);
}
EXPORT_SYMBOL_GPL(devl_linecard_destroy);
/**
* devlink_linecard_provision_set - Set provisioning on linecard
*
* @linecard: devlink linecard
* @type: linecard type
*
* This is either called directly from the provision() op call or
* as a result of the provision() op call asynchronously.
*/
void devlink_linecard_provision_set(struct devlink_linecard *linecard,
const char *type)
{
mutex_lock(&linecard->state_lock);
WARN_ON(linecard->type && strcmp(linecard->type, type));
linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED;
linecard->type = type;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
EXPORT_SYMBOL_GPL(devlink_linecard_provision_set);
/**
* devlink_linecard_provision_clear - Clear provisioning on linecard
*
* @linecard: devlink linecard
*
* This is either called directly from the unprovision() op call or
* as a result of the unprovision() op call asynchronously.
*/
void devlink_linecard_provision_clear(struct devlink_linecard *linecard)
{
mutex_lock(&linecard->state_lock);
WARN_ON(linecard->nested_devlink);
linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
linecard->type = NULL;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
EXPORT_SYMBOL_GPL(devlink_linecard_provision_clear);
/**
* devlink_linecard_provision_fail - Fail provisioning on linecard
*
* @linecard: devlink linecard
*
* This is either called directly from the provision() op call or
* as a result of the provision() op call asynchronously.
*/
void devlink_linecard_provision_fail(struct devlink_linecard *linecard)
{
mutex_lock(&linecard->state_lock);
WARN_ON(linecard->nested_devlink);
linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING_FAILED;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
EXPORT_SYMBOL_GPL(devlink_linecard_provision_fail);
/**
* devlink_linecard_activate - Set linecard active
*
* @linecard: devlink linecard
*/
void devlink_linecard_activate(struct devlink_linecard *linecard)
{
mutex_lock(&linecard->state_lock);
WARN_ON(linecard->state != DEVLINK_LINECARD_STATE_PROVISIONED);
linecard->state = DEVLINK_LINECARD_STATE_ACTIVE;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
EXPORT_SYMBOL_GPL(devlink_linecard_activate);
/**
* devlink_linecard_deactivate - Set linecard inactive
*
* @linecard: devlink linecard
*/
void devlink_linecard_deactivate(struct devlink_linecard *linecard)
{
mutex_lock(&linecard->state_lock);
switch (linecard->state) {
case DEVLINK_LINECARD_STATE_ACTIVE:
linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
break;
case DEVLINK_LINECARD_STATE_UNPROVISIONING:
/* Line card is being deactivated as part
* of unprovisioning flow.
*/
break;
default:
WARN_ON(1);
break;
}
mutex_unlock(&linecard->state_lock);
}
EXPORT_SYMBOL_GPL(devlink_linecard_deactivate);
/**
* devlink_linecard_nested_dl_set - Attach/detach nested devlink
* instance to linecard.
*
* @linecard: devlink linecard
* @nested_devlink: devlink instance to attach or NULL to detach
*/
void devlink_linecard_nested_dl_set(struct devlink_linecard *linecard,
struct devlink *nested_devlink)
{
mutex_lock(&linecard->state_lock);
linecard->nested_devlink = nested_devlink;
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
mutex_unlock(&linecard->state_lock);
}
EXPORT_SYMBOL_GPL(devlink_linecard_nested_dl_set);