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Date: Wed, 13 Jan 2021 13:12:14 +0100
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, kuba@...nel.org, jacob.e.keller@...el.com,
roopa@...dia.com, mlxsw@...dia.com
Subject: [patch net-next RFC 02/10] devlink: implement line card provisioning
From: Jiri Pirko <jiri@...dia.com>
In order to be able to configure all needed stuff on a port/netdevice
of a line card without the line card being present, introduce line card
provisioning. Basically provisioning will create a placeholder for
instances (ports/netdevices) for a line card type.
Allow the user to query the supported line card types over line card
get command. Then implement two netlink commands to allow user to
provision/unprovision the line card with selected line card type.
On the driver API side, add provision/unprovision ops and supported
types array to be advertised. Upon provision op call, the driver should
take care of creating the instances for the particular line card type.
Introduce provision_set/clear() functions to be called by the driver
once the provisioning/unprovisioning is done on its side.
Signed-off-by: Jiri Pirko <jiri@...dia.com>
---
include/net/devlink.h | 31 +++++++-
include/uapi/linux/devlink.h | 17 +++++
net/core/devlink.c | 141 ++++++++++++++++++++++++++++++++++-
3 files changed, 185 insertions(+), 4 deletions(-)
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 67c2547d5ef9..854abd53e9ea 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -139,10 +139,33 @@ struct devlink_port {
struct mutex reporters_lock; /* Protects reporter_list */
};
+struct devlink_linecard_ops;
+
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;
+ const char *provisioned_type;
+};
+
+/**
+ * struct devlink_linecard_ops - Linecard operations
+ * @supported_types: array of supported types of linecards
+ * @supported_types_count: number of elements in the array above
+ * @provision: callback to provision the linecard slot with certain
+ * type of linecard
+ * @unprovision: callback to unprovision the linecard slot
+ */
+struct devlink_linecard_ops {
+ const char **supported_types;
+ unsigned int supported_types_count;
+ int (*provision)(struct devlink_linecard *linecard, void *priv,
+ u32 type_index, struct netlink_ext_ack *extack);
+ int (*unprovision)(struct devlink_linecard *linecard, void *priv,
+ struct netlink_ext_ack *extack);
};
struct devlink_sb_pool_info {
@@ -1414,9 +1437,13 @@ void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 contro
u16 pf, bool external);
void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller,
u16 pf, u16 vf, bool external);
-struct devlink_linecard *devlink_linecard_create(struct devlink *devlink,
- unsigned int linecard_index);
+struct devlink_linecard *
+devlink_linecard_create(struct devlink *devlink, unsigned int linecard_index,
+ const struct devlink_linecard_ops *ops, void *priv);
void devlink_linecard_destroy(struct devlink_linecard *linecard);
+void devlink_linecard_provision_set(struct devlink_linecard *linecard,
+ u32 type_index);
+void devlink_linecard_provision_clear(struct devlink_linecard *linecard);
int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
u32 size, u16 ingress_pools_count,
u16 egress_pools_count, u16 ingress_tc_count,
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index e5ed0522591f..4111ddcc000b 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -131,6 +131,9 @@ enum devlink_command {
DEVLINK_CMD_LINECARD_NEW,
DEVLINK_CMD_LINECARD_DEL,
+ DEVLINK_CMD_LINECARD_PROVISION,
+ DEVLINK_CMD_LINECARD_UNPROVISION,
+
/* add new commands above here */
__DEVLINK_CMD_MAX,
DEVLINK_CMD_MAX = __DEVLINK_CMD_MAX - 1
@@ -329,6 +332,17 @@ enum devlink_reload_limit {
#define DEVLINK_RELOAD_LIMITS_VALID_MASK (_BITUL(__DEVLINK_RELOAD_LIMIT_MAX) - 1)
+enum devlink_linecard_state {
+ DEVLINK_LINECARD_STATE_UNSPEC,
+ DEVLINK_LINECARD_STATE_UNPROVISIONED,
+ DEVLINK_LINECARD_STATE_UNPROVISIONING,
+ DEVLINK_LINECARD_STATE_PROVISIONING,
+ DEVLINK_LINECARD_STATE_PROVISIONED,
+
+ __DEVLINK_LINECARD_STATE_MAX,
+ DEVLINK_LINECARD_STATE_MAX = __DEVLINK_LINECARD_STATE_MAX - 1
+};
+
enum devlink_attr {
/* don't change the order or add anything between, this is ABI! */
DEVLINK_ATTR_UNSPEC,
@@ -535,6 +549,9 @@ enum devlink_attr {
DEVLINK_ATTR_RELOAD_ACTION_STATS, /* nested */
DEVLINK_ATTR_LINECARD_INDEX, /* u32 */
+ DEVLINK_ATTR_LINECARD_STATE, /* u8 */
+ DEVLINK_ATTR_LINECARD_TYPE, /* string */
+ DEVLINK_ATTR_LINECARD_SUPPORTED_TYPES, /* nested */
/* add new attributes above here, update the policy in devlink.c */
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 564e921133cf..434eecc310c3 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -1192,7 +1192,9 @@ static int devlink_nl_linecard_fill(struct sk_buff *msg,
u32 seq, int flags,
struct netlink_ext_ack *extack)
{
+ struct nlattr *attr;
void *hdr;
+ int i;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
@@ -1202,6 +1204,22 @@ static int devlink_nl_linecard_fill(struct sk_buff *msg,
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->state >= DEVLINK_LINECARD_STATE_PROVISIONED &&
+ nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE,
+ linecard->provisioned_type))
+ goto nla_put_failure;
+
+ attr = nla_nest_start(msg, DEVLINK_ATTR_LINECARD_SUPPORTED_TYPES);
+ if (!attr)
+ return -EMSGSIZE;
+ for (i = 0; i < linecard->ops->supported_types_count; i++) {
+ if (nla_put_string(msg, DEVLINK_ATTR_LINECARD_TYPE,
+ linecard->ops->supported_types[i]))
+ goto nla_put_failure;
+ }
+ nla_nest_end(msg, attr);
genlmsg_end(msg, hdr);
return 0;
@@ -1300,6 +1318,68 @@ static int devlink_nl_cmd_linecard_get_dumpit(struct sk_buff *msg,
return msg->len;
}
+static int devlink_nl_cmd_linecard_provision_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_linecard *linecard = info->user_ptr[1];
+ const char *type;
+ int i;
+
+ if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Linecard is currently being provisioned");
+ return -EBUSY;
+ }
+ if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Linecard is currently being unprovisioned");
+ return -EBUSY;
+ }
+ if (linecard->state != DEVLINK_LINECARD_STATE_UNPROVISIONED) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Linecard already provisioned");
+ return -EBUSY;
+ }
+
+ if (!info->attrs[DEVLINK_ATTR_LINECARD_TYPE]) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Provision type not provided");
+ return -EINVAL;
+ }
+
+ type = nla_data(info->attrs[DEVLINK_ATTR_LINECARD_TYPE]);
+ for (i = 0; i < linecard->ops->supported_types_count; i++) {
+ if (!strcmp(linecard->ops->supported_types[i], type)) {
+ linecard->state = DEVLINK_LINECARD_STATE_PROVISIONING;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ return linecard->ops->provision(linecard,
+ linecard->priv, i,
+ info->extack);
+ }
+ }
+ NL_SET_ERR_MSG_MOD(info->extack, "Unsupported provision type provided");
+ return -EINVAL;
+}
+
+static int devlink_nl_cmd_linecard_unprovision_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink_linecard *linecard = info->user_ptr[1];
+
+ if (linecard->state == DEVLINK_LINECARD_STATE_PROVISIONING) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Linecard is currently being provisioned");
+ return -EBUSY;
+ }
+ if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONING) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Linecard is currently being unprovisioned");
+ return -EBUSY;
+ }
+ if (linecard->state == DEVLINK_LINECARD_STATE_UNPROVISIONED) {
+ NL_SET_ERR_MSG_MOD(info->extack, "Linecard is not provisioned");
+ return -EOPNOTSUPP;
+ }
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONING;
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+ return linecard->ops->unprovision(linecard, linecard->priv,
+ 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,
@@ -7759,6 +7839,7 @@ static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
DEVLINK_RELOAD_ACTION_MAX),
[DEVLINK_ATTR_RELOAD_LIMITS] = NLA_POLICY_BITFIELD32(DEVLINK_RELOAD_LIMITS_VALID_MASK),
[DEVLINK_ATTR_LINECARD_INDEX] = { .type = NLA_U32 },
+ [DEVLINK_ATTR_LINECARD_TYPE] = { .type = NLA_NUL_STRING },
};
static const struct genl_small_ops devlink_nl_ops[] = {
@@ -7806,6 +7887,20 @@ static const struct genl_small_ops devlink_nl_ops[] = {
.internal_flags = DEVLINK_NL_FLAG_NEED_LINECARD,
/* can be retrieved by unprivileged users */
},
+ {
+ .cmd = DEVLINK_CMD_LINECARD_PROVISION,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_linecard_provision_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_LINECARD,
+ },
+ {
+ .cmd = DEVLINK_CMD_LINECARD_UNPROVISION,
+ .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+ .doit = devlink_nl_cmd_linecard_unprovision_doit,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_LINECARD,
+ },
{
.cmd = DEVLINK_CMD_SB_GET,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
@@ -8613,11 +8708,17 @@ static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port,
* Create devlink linecard instance with provided linecard index.
* Caller can use any indexing, even hw-related one.
*/
-struct devlink_linecard *devlink_linecard_create(struct devlink *devlink,
- unsigned int linecard_index)
+struct devlink_linecard *
+devlink_linecard_create(struct devlink *devlink, unsigned int linecard_index,
+ const struct devlink_linecard_ops *ops, void *priv)
{
struct devlink_linecard *linecard;
+ if (WARN_ON(!ops || !ops->supported_types ||
+ !ops->supported_types_count ||
+ !ops->provision || !ops->unprovision))
+ return ERR_PTR(-EINVAL);
+
mutex_lock(&devlink->lock);
if (devlink_linecard_index_exists(devlink, linecard_index)) {
mutex_unlock(&devlink->lock);
@@ -8630,6 +8731,9 @@ struct devlink_linecard *devlink_linecard_create(struct devlink *devlink,
linecard->devlink = devlink;
linecard->index = linecard_index;
+ linecard->ops = ops;
+ linecard->priv = priv;
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
list_add_tail(&linecard->list, &devlink->linecard_list);
mutex_unlock(&devlink->lock);
devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
@@ -8653,6 +8757,39 @@ void devlink_linecard_destroy(struct devlink_linecard *linecard)
}
EXPORT_SYMBOL_GPL(devlink_linecard_create);
+/**
+ * devlink_linecard_provision_set - Set provisioning on linecard
+ *
+ * @devlink_linecard: devlink linecard
+ * @type_index: index of the linecard type (in array of types in ops)
+ */
+void devlink_linecard_provision_set(struct devlink_linecard *linecard,
+ u32 type_index)
+{
+ WARN_ON(type_index >= linecard->ops->supported_types_count);
+ mutex_lock(&linecard->devlink->lock);
+ linecard->state = DEVLINK_LINECARD_STATE_PROVISIONED;
+ linecard->provisioned_type = linecard->ops->supported_types[type_index];
+ mutex_unlock(&linecard->devlink->lock);
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_provision_set);
+
+/**
+ * devlink_linecard_provision_clear - Clear provisioning on linecard
+ *
+ * @devlink_linecard: devlink linecard
+ */
+void devlink_linecard_provision_clear(struct devlink_linecard *linecard)
+{
+ mutex_lock(&linecard->devlink->lock);
+ linecard->state = DEVLINK_LINECARD_STATE_UNPROVISIONED;
+ linecard->provisioned_type = NULL;
+ mutex_unlock(&linecard->devlink->lock);
+ devlink_linecard_notify(linecard, DEVLINK_CMD_LINECARD_NEW);
+}
+EXPORT_SYMBOL_GPL(devlink_linecard_provision_clear);
+
int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
u32 size, u16 ingress_pools_count,
u16 egress_pools_count, u16 ingress_tc_count,
--
2.26.2
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