Add a framework for running selftests.
Framework exposes devlink commands and test suite(s) to the user
to execute and query the supported tests by the driver.
Below are new entries in devlink_nl_ops
devlink_nl_cmd_selftests_list_doit/dumpit: To query the supported
selftests by the drivers.
devlink_nl_cmd_selftests_run: To execute selftests. Users can
provide a test mask for executing group tests or standalone tests.
Documentation/networking/devlink/ path is already part of MAINTAINERS &
the new files come under this path. Hence no update needed to the
MAINTAINERS
Signed-off-by: Vikas Gupta <vikas.gupta@xxxxxxxxxxxx>
Reviewed-by: Michael Chan <michael.chan@xxxxxxxxxxxx>
Reviewed-by: Andy Gospodarek <andrew.gospodarek@xxxxxxxxxxxx>
---
.../networking/devlink/devlink-selftests.rst | 38 +++
include/net/devlink.h | 20 ++
include/uapi/linux/devlink.h | 29 +++
net/core/devlink.c | 225 ++++++++++++++++++
4 files changed, 312 insertions(+)
create mode 100644 Documentation/networking/devlink/devlink-selftests.rst
diff --git a/Documentation/networking/devlink/devlink-selftests.rst b/Documentation/networking/devlink/devlink-selftests.rst
new file mode 100644
index 000000000000..0e9727895987
--- /dev/null
+++ b/Documentation/networking/devlink/devlink-selftests.rst
@@ -0,0 +1,38 @@
+.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
+=================
+Devlink Selftests
+=================
+
+The ``devlink-selftests`` API allows executing selftests on the device.
+
+Tests Mask
+==========
+The ``devlink-selftests`` command should be run with a mask indicating
+the tests to be executed.
+
+Tests Description
+=================
+The following is a list of tests that drivers may execute.
+
+.. list-table:: List of tests
+ :widths: 5 90
+
+ * - Name
+ - Description
+ * - ``DEVLINK_SELFTEST_FLASH``
+ - Devices may have the firmware on non-volatile memory on the board, e.g.
+ flash. This particular test helps to run a flash selftest on the device.
+ Implementation of the test is left to the driver/firmware.
+
+example usage
+-------------
+
+.. code:: shell
+
+ # Query selftests supported on the devlink device
+ $ devlink dev selftests show DEV
+ # Query selftests supported on all devlink devices
+ $ devlink dev selftests show
+ # Executes selftests on the device
+ $ devlink dev selftests run DEV test flash
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 88c701b375a2..085d761f1cd3 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1509,6 +1509,26 @@ struct devlink_ops {
struct devlink_rate *parent,
void *priv_child, void *priv_parent,
struct netlink_ext_ack *extack);
+ /**
+ * selftests_check() - queries if selftest is supported
+ * @devlink: Devlink instance
+ * @test_id: test index
+ * @extack: extack for reporting error messages
+ *
+ * Return: true if test is supported by the driver
+ */
+ bool (*selftest_check)(struct devlink *devlink, int test_id,
+ struct netlink_ext_ack *extack);
+ /**
+ * selftest_run() - Runs a selftest
+ * @devlink: Devlink instance
+ * @test_id: test index
+ * @extack: extack for reporting error messages
+ *
+ * Return: Result of the test
+ */
+ u8 (*selftest_run)(struct devlink *devlink, int test_id,
+ struct netlink_ext_ack *extack);
};
void *devlink_priv(struct devlink *devlink);
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index b3d40a5d72ff..469846f40e6d 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -136,6 +136,9 @@ enum devlink_command {
DEVLINK_CMD_LINECARD_NEW,
DEVLINK_CMD_LINECARD_DEL,
+ DEVLINK_CMD_SELFTESTS_LIST, /* can dump */
+ DEVLINK_CMD_SELFTESTS_RUN,
+
/* add new commands above here */
__DEVLINK_CMD_MAX,
DEVLINK_CMD_MAX = __DEVLINK_CMD_MAX - 1
@@ -276,6 +279,31 @@ enum {
#define DEVLINK_SUPPORTED_FLASH_OVERWRITE_SECTIONS \
(_BITUL(__DEVLINK_FLASH_OVERWRITE_MAX_BIT) - 1)
+/* Commonly used test cases */
+enum devlink_selftest_attr {
+ DEVLINK_SELFTEST_ATTR_UNSPEC,
+ DEVLINK_SELFTEST_ATTR_FLASH, /* flag */
+
+ __DEVLINK_SELFTEST_ATTR_MAX,
+ DEVLINK_SELFTEST_ATTR_MAX = __DEVLINK_SELFTEST_ATTR_MAX - 1
+};
+
+enum devlink_selftest_result {
+ DEVLINK_SELFTEST_SKIP,
+ DEVLINK_SELFTEST_PASS,
+ DEVLINK_SELFTEST_FAIL
+};
+
+enum devlink_selftest_result_attr {
+ DEVLINK_SELFTEST_ATTR_RESULT_UNSPEC,
+ DEVLINK_SELFTEST_ATTR_RESULT, /* nested */
+ DEVLINK_SELFTEST_ATTR_TEST_ID, /* u32, devlink_selftest_attr */
+ DEVLINK_SELFTEST_ATTR_TEST_STATUS, /* u8, devlink_selftest_result */
+
+ __DEVLINK_SELFTEST_ATTR_RES_MAX,
+ DEVLINK_SELFTEST_ATTR_RES_MAX = __DEVLINK_SELFTEST_ATTR_RES_MAX - 1
+};
+
/**
* enum devlink_trap_action - Packet trap action.
* @DEVLINK_TRAP_ACTION_DROP: Packet is dropped by the device and a copy is not
@@ -576,6 +604,7 @@ enum devlink_attr {
DEVLINK_ATTR_LINECARD_TYPE, /* string */
DEVLINK_ATTR_LINECARD_SUPPORTED_TYPES, /* nested */
+ DEVLINK_ATTR_SELFTESTS_INFO, /* nested */
/* add new attributes above here, update the policy in devlink.c */
__DEVLINK_ATTR_MAX,
diff --git a/net/core/devlink.c b/net/core/devlink.c
index a9776ea923ae..ef9439f2502f 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -198,6 +198,10 @@ static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_
DEVLINK_PORT_FN_STATE_ACTIVE),
};
+static const struct nla_policy devlink_selftest_nl_policy[DEVLINK_SELFTEST_ATTR_MAX + 1] = {
+ [DEVLINK_SELFTEST_ATTR_FLASH] = { .type = NLA_FLAG },
+};
+
static DEFINE_XARRAY_FLAGS(devlinks, XA_FLAGS_ALLOC);
#define DEVLINK_REGISTERED XA_MARK_1
@@ -4791,6 +4795,215 @@ static int devlink_nl_cmd_flash_update(struct sk_buff *skb,
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_list;
+ void *hdr;
+ int err;
+ int i;
+
+ hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags,
+ DEVLINK_CMD_SELFTESTS_LIST);
+ if (!hdr)
+ return -EMSGSIZE;
+
+ err = -EMSGSIZE;
+ if (devlink_nl_put_handle(msg, devlink))
+ goto err_cancel_msg;
+
+ selftests_list = nla_nest_start(msg, DEVLINK_ATTR_SELFTESTS_INFO);
+ if (!selftests_list)
+ goto err_cancel_msg;
+
+ for (i = 1; i < DEVLINK_SELFTEST_ATTR_MAX + 1; 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_list);
+
+ genlmsg_end(msg, hdr);
+
+ return 0;
+
+err_cancel_msg:
+ genlmsg_cancel(msg, hdr);
+ return err;
+}
+
+static int devlink_nl_cmd_selftests_list_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_cmd_selftests_list_dumpit(struct sk_buff *msg,
+ struct netlink_callback *cb)
+{
+ struct devlink *devlink;
+ int start = cb->args[0];
+ unsigned long index;
+ int idx = 0;
+ int err = 0;
+
+ mutex_lock(&devlink_mutex);
+ xa_for_each_marked(&devlinks, index, devlink, DEVLINK_REGISTERED) {
+ if (!devlink_try_get(devlink))
+ continue;
+
+ if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
+ goto retry;
+
+ if (idx < start || !devlink->ops->selftest_check)
+ goto inc;
+
+ mutex_lock(&devlink->lock);
+ err = devlink_nl_selftests_fill(msg, devlink,
+ NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI,
+ cb->extack);
+ mutex_unlock(&devlink->lock);
+ if (err) {
+ devlink_put(devlink);
+ break;
+ }
+inc:
+ idx++;
+retry:
+ devlink_put(devlink);
+ }
+ mutex_unlock(&devlink_mutex);
+
+ if (err != -EMSGSIZE)
+ return err;
+
+ cb->args[0] = idx;
+ return msg->len;
+}
+
+static int devlink_selftest_result_put(struct sk_buff *skb, int test_id,
+ u8 result)
+{
+ struct nlattr *result_attr;
+
+ result_attr = nla_nest_start(skb, DEVLINK_SELFTEST_ATTR_RESULT);
+ if (!result_attr)
+ return -EMSGSIZE;
+
+ if (nla_put_u32(skb, DEVLINK_SELFTEST_ATTR_TEST_ID, test_id) ||
+ nla_put_u8(skb, DEVLINK_SELFTEST_ATTR_TEST_STATUS, result))
+ goto nla_put_failure;
+
+ nla_nest_end(skb, result_attr);
+
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(skb, result_attr);
+ return -EMSGSIZE;
+}
+
+static int devlink_nl_cmd_selftests_run(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct nlattr *tb[DEVLINK_SELFTEST_ATTR_MAX + 1];
+ struct devlink *devlink = info->user_ptr[0];
+ struct nlattr *attrs, *tests_info;
+ struct sk_buff *msg;
+ void *hdr;
+ int err;
+ int i;
+
+ if (!devlink->ops->selftest_run)
+ return -EOPNOTSUPP;
+
+ if (!info->attrs[DEVLINK_ATTR_SELFTESTS_INFO])
+ return -EINVAL;
+
+ attrs = info->attrs[DEVLINK_ATTR_SELFTESTS_INFO];
+
+ err = nla_parse_nested(tb, DEVLINK_SELFTEST_ATTR_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;
+
+ tests_info = nla_nest_start(msg, DEVLINK_ATTR_SELFTESTS_INFO);
+ if (!tests_info)
+ goto genlmsg_cancel;
+
+ for (i = 1; i < DEVLINK_SELFTEST_ATTR_MAX + 1; i++) {
+ u8 res = DEVLINK_SELFTEST_SKIP;
+
+ if (nla_get_flag(tb[i])) {
+ if (devlink->ops->selftest_check &&
+ !devlink->ops->selftest_check(devlink, i,
+ info->extack)) {
+ err = devlink_selftest_result_put(msg, i, res);
+ if (err)
+ goto selftests_list_nest_cancel;
+ continue;
+ }
+
+ res = devlink->ops->selftest_run(devlink, i,
+ info->extack);
+ err = devlink_selftest_result_put(msg, i, res);
+ if (err)
+ goto selftests_list_nest_cancel;
+ }
+ }
+
+ nla_nest_end(msg, tests_info);
+
+ genlmsg_end(msg, hdr);
+
+ return genlmsg_reply(msg, info);
+
+selftests_list_nest_cancel:
+ nla_nest_cancel(msg, tests_info);
+genlmsg_cancel:
+ genlmsg_cancel(msg, hdr);
+free_msg:
+ nlmsg_free(msg);
+ return err;
+}
+
static const struct devlink_param devlink_param_generic[] = {
{
.id = DEVLINK_PARAM_GENERIC_ID_INT_ERR_RESET,
@@ -8997,6 +9210,7 @@ static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
[DEVLINK_ATTR_RATE_PARENT_NODE_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_LINECARD_INDEX] = { .type = NLA_U32 },
[DEVLINK_ATTR_LINECARD_TYPE] = { .type = NLA_NUL_STRING },
+ [DEVLINK_ATTR_SELFTESTS_INFO] = { .type = NLA_NESTED },
};
static const struct genl_small_ops devlink_nl_ops[] = {
@@ -9356,6 +9570,17 @@ static const struct genl_small_ops devlink_nl_ops[] = {
.doit = devlink_nl_cmd_trap_policer_set_doit,
.flags = GENL_ADMIN_PERM,
},
+ {
+ .cmd = DEVLINK_CMD_SELFTESTS_LIST,
+ .doit = devlink_nl_cmd_selftests_list_doit,
+ .dumpit = devlink_nl_cmd_selftests_list_dumpit
+ /* can be retrieved by unprivileged users */
+ },
+ {
+ .cmd = DEVLINK_CMD_SELFTESTS_RUN,
+ .doit = devlink_nl_cmd_selftests_run,
+ .flags = GENL_ADMIN_PERM,
+ },
};
static struct genl_family devlink_nl_family __ro_after_init = {
--
2.31.1
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