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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 Reviewed-by: Michael Chan Reviewed-by: Andy Gospodarek --- .../networking/devlink/devlink-selftests.rst | 38 +++ include/net/devlink.h | 20 ++ include/uapi/linux/devlink.h | 29 +++ net/core/devlink.c | 216 ++++++++++++++++++ 4 files changed, 303 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..9d8fc09f2c39 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..57a9a183e1d1 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 +4795,206 @@ 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; + + if (nla_get_flag(tb[i])) { + 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 +9201,7 @@ 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 +9561,17 @@ 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 --00000000000061657905e40e5f6c Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQagYJKoZIhvcNAQcCoIIQWzCCEFcCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3BMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE AxMKR2xvYmFsU2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yODA5MTYwMDAwMDBaMFsxCzAJBgNVBAYT AkJFMRkwFwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTEwLwYDVQQDEyhHbG9iYWxTaWduIEdDQyBS MyBQZXJzb25hbFNpZ24gMiBDQSAyMDIwMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA vbCmXCcsbZ/a0fRIQMBxp4gJnnyeneFYpEtNydrZZ+GeKSMdHiDgXD1UnRSIudKo+moQ6YlCOu4t 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