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[213.179.129.39]) by smtp.gmail.com with ESMTPSA id g18-20020a50d5d2000000b0044602e3dcd7sm2995702edj.95.2022.08.24.05.20.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Aug 2022 05:20:16 -0700 (PDT) From: Jiri Pirko To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, idosch@nvidia.com, pabeni@redhat.com, edumazet@google.com, saeedm@nvidia.com, jacob.e.keller@intel.com, vikas.gupta@broadcom.com, gospo@broadcom.com Subject: [patch net-next v3 3/3] net: devlink: limit flash component name to match version returned by info_get() Date: Wed, 24 Aug 2022 14:20:11 +0200 Message-Id: <20220824122011.1204330-4-jiri@resnulli.us> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220824122011.1204330-1-jiri@resnulli.us> References: <20220824122011.1204330-1-jiri@resnulli.us> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Jiri Pirko Limit the acceptance of component name passed to cmd_flash_update() to match one of the versions returned by info_get(), marked by version type. This makes things clearer and enforces 1:1 mapping between exposed version and accepted flash component. Check VERSION_TYPE_COMPONENT version type during cmd_flash_update() execution by calling info_get() with different "req" context. That causes info_get() to lookup the component name instead of filling-up the netlink message. Remove "UPDATE_COMPONENT" flag which becomes used. Signed-off-by: Jiri Pirko --- v1->v2: - split from v1 patch "net: devlink: extend info_get() version put to indicate a flash component", no code changes --- drivers/net/netdevsim/dev.c | 3 +- include/net/devlink.h | 3 +- net/core/devlink.c | 105 ++++++++++++++++++++++++++++++------ 3 files changed, 90 insertions(+), 21 deletions(-) diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c index d6938faf6c8b..efea94c27880 100644 --- a/drivers/net/netdevsim/dev.c +++ b/drivers/net/netdevsim/dev.c @@ -1322,8 +1322,7 @@ nsim_dev_devlink_trap_drop_counter_get(struct devlink *devlink, static const struct devlink_ops nsim_dev_devlink_ops = { .eswitch_mode_set = nsim_devlink_eswitch_mode_set, .eswitch_mode_get = nsim_devlink_eswitch_mode_get, - .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT | - DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK, + .supported_flash_update_params = DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK, .reload_actions = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT), .reload_down = nsim_dev_reload_down, .reload_up = nsim_dev_reload_up, diff --git a/include/net/devlink.h b/include/net/devlink.h index f50a002e5023..1f7026011856 100644 --- a/include/net/devlink.h +++ b/include/net/devlink.h @@ -624,8 +624,7 @@ struct devlink_flash_update_params { u32 overwrite_mask; }; -#define DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT BIT(0) -#define DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK BIT(1) +#define DEVLINK_SUPPORT_FLASH_UPDATE_OVERWRITE_MASK BIT(0) struct devlink_region; struct devlink_info_req; diff --git a/net/core/devlink.c b/net/core/devlink.c index 43c75b5ac039..0f7078db1280 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -4742,10 +4742,76 @@ void devlink_flash_update_timeout_notify(struct devlink *devlink, } EXPORT_SYMBOL_GPL(devlink_flash_update_timeout_notify); +struct devlink_info_req { + struct sk_buff *msg; + void (*version_cb)(const char *version_name, + enum devlink_info_version_type version_type, + void *version_cb_priv); + void *version_cb_priv; +}; + +struct devlink_flash_component_lookup_ctx { + const char *lookup_name; + bool lookup_name_found; +}; + +static void +devlink_flash_component_lookup_cb(const char *version_name, + enum devlink_info_version_type version_type, + void *version_cb_priv) +{ + struct devlink_flash_component_lookup_ctx *lookup_ctx = version_cb_priv; + + if (version_type != DEVLINK_INFO_VERSION_TYPE_COMPONENT || + lookup_ctx->lookup_name_found) + return; + + lookup_ctx->lookup_name_found = + !strcmp(lookup_ctx->lookup_name, version_name); +} + +static int devlink_flash_component_get(struct devlink *devlink, + struct nlattr *nla_component, + const char **p_component, + struct netlink_ext_ack *extack) +{ + struct devlink_flash_component_lookup_ctx lookup_ctx = {}; + struct devlink_info_req req = {}; + const char *component; + int ret; + + if (!nla_component) + return 0; + + component = nla_data(nla_component); + + if (!devlink->ops->info_get) { + NL_SET_ERR_MSG_ATTR(extack, nla_component, + "component update is not supported by this device"); + return -EOPNOTSUPP; + } + + lookup_ctx.lookup_name = component; + req.version_cb = devlink_flash_component_lookup_cb; + req.version_cb_priv = &lookup_ctx; + + ret = devlink->ops->info_get(devlink, &req, NULL); + if (ret) + return ret; + + if (!lookup_ctx.lookup_name_found) { + NL_SET_ERR_MSG_ATTR(extack, nla_component, + "selected component is not supported by this device"); + return -EINVAL; + } + *p_component = component; + return 0; +} + static int devlink_nl_cmd_flash_update(struct sk_buff *skb, struct genl_info *info) { - struct nlattr *nla_component, *nla_overwrite_mask, *nla_file_name; + struct nlattr *nla_overwrite_mask, *nla_file_name; struct devlink_flash_update_params params = {}; struct devlink *devlink = info->user_ptr[0]; const char *file_name; @@ -4758,17 +4824,13 @@ static int devlink_nl_cmd_flash_update(struct sk_buff *skb, if (!info->attrs[DEVLINK_ATTR_FLASH_UPDATE_FILE_NAME]) return -EINVAL; - supported_params = devlink->ops->supported_flash_update_params; + ret = devlink_flash_component_get(devlink, + info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT], + ¶ms.component, info->extack); + if (ret) + return ret; - nla_component = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_COMPONENT]; - if (nla_component) { - if (!(supported_params & DEVLINK_SUPPORT_FLASH_UPDATE_COMPONENT)) { - NL_SET_ERR_MSG_ATTR(info->extack, nla_component, - "component update is not supported by this device"); - return -EOPNOTSUPP; - } - params.component = nla_data(nla_component); - } + supported_params = devlink->ops->supported_flash_update_params; nla_overwrite_mask = info->attrs[DEVLINK_ATTR_FLASH_UPDATE_OVERWRITE_MASK]; if (nla_overwrite_mask) { @@ -6553,18 +6615,18 @@ static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb, return err; } -struct devlink_info_req { - struct sk_buff *msg; -}; - int devlink_info_driver_name_put(struct devlink_info_req *req, const char *name) { + if (!req->msg) + return 0; return nla_put_string(req->msg, DEVLINK_ATTR_INFO_DRIVER_NAME, name); } EXPORT_SYMBOL_GPL(devlink_info_driver_name_put); int devlink_info_serial_number_put(struct devlink_info_req *req, const char *sn) { + if (!req->msg) + return 0; return nla_put_string(req->msg, DEVLINK_ATTR_INFO_SERIAL_NUMBER, sn); } EXPORT_SYMBOL_GPL(devlink_info_serial_number_put); @@ -6572,6 +6634,8 @@ EXPORT_SYMBOL_GPL(devlink_info_serial_number_put); int devlink_info_board_serial_number_put(struct devlink_info_req *req, const char *bsn) { + if (!req->msg) + return 0; return nla_put_string(req->msg, DEVLINK_ATTR_INFO_BOARD_SERIAL_NUMBER, bsn); } @@ -6585,6 +6649,13 @@ static int devlink_info_version_put(struct devlink_info_req *req, int attr, struct nlattr *nest; int err; + if (req->version_cb) + req->version_cb(version_name, version_type, + req->version_cb_priv); + + if (!req->msg) + return 0; + nest = nla_nest_start_noflag(req->msg, attr); if (!nest) return -EMSGSIZE; @@ -6665,7 +6736,7 @@ devlink_nl_info_fill(struct sk_buff *msg, struct devlink *devlink, enum devlink_command cmd, u32 portid, u32 seq, int flags, struct netlink_ext_ack *extack) { - struct devlink_info_req req; + struct devlink_info_req req = {}; void *hdr; int err; @@ -12332,8 +12403,8 @@ EXPORT_SYMBOL_GPL(devl_trap_policers_unregister); static void __devlink_compat_running_version(struct devlink *devlink, char *buf, size_t len) { + struct devlink_info_req req = {}; const struct nlattr *nlattr; - struct devlink_info_req req; struct sk_buff *msg; int rem, err;