diff options
Diffstat (limited to 'drivers/nvme/target/configfs.c')
| -rw-r--r-- | drivers/nvme/target/configfs.c | 138 |
1 files changed, 129 insertions, 9 deletions
diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c index 6a2816f3b4e8..907143870da5 100644 --- a/drivers/nvme/target/configfs.c +++ b/drivers/nvme/target/configfs.c @@ -4,6 +4,7 @@ * Copyright (c) 2015-2016 HGST, a Western Digital Company. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/kstrtox.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> @@ -267,7 +268,7 @@ static ssize_t nvmet_param_pi_enable_store(struct config_item *item, struct nvmet_port *port = to_nvmet_port(item); bool val; - if (strtobool(page, &val)) + if (kstrtobool(page, &val)) return -EINVAL; if (nvmet_is_port_enabled(port, __func__)) @@ -532,7 +533,7 @@ static ssize_t nvmet_ns_enable_store(struct config_item *item, bool enable; int ret = 0; - if (strtobool(page, &enable)) + if (kstrtobool(page, &enable)) return -EINVAL; if (enable) @@ -556,7 +557,7 @@ static ssize_t nvmet_ns_buffered_io_store(struct config_item *item, struct nvmet_ns *ns = to_nvmet_ns(item); bool val; - if (strtobool(page, &val)) + if (kstrtobool(page, &val)) return -EINVAL; mutex_lock(&ns->subsys->lock); @@ -579,7 +580,7 @@ static ssize_t nvmet_ns_revalidate_size_store(struct config_item *item, struct nvmet_ns *ns = to_nvmet_ns(item); bool val; - if (strtobool(page, &val)) + if (kstrtobool(page, &val)) return -EINVAL; if (!val) @@ -728,7 +729,7 @@ static ssize_t nvmet_passthru_enable_store(struct config_item *item, bool enable; int ret = 0; - if (strtobool(page, &enable)) + if (kstrtobool(page, &enable)) return -EINVAL; if (enable) @@ -995,7 +996,7 @@ static ssize_t nvmet_subsys_attr_allow_any_host_store(struct config_item *item, bool allow_any_host; int ret = 0; - if (strtobool(page, &allow_any_host)) + if (kstrtobool(page, &allow_any_host)) return -EINVAL; down_write(&nvmet_config_sem); @@ -1262,6 +1263,116 @@ static ssize_t nvmet_subsys_attr_model_store(struct config_item *item, } CONFIGFS_ATTR(nvmet_subsys_, attr_model); +static ssize_t nvmet_subsys_attr_ieee_oui_show(struct config_item *item, + char *page) +{ + struct nvmet_subsys *subsys = to_subsys(item); + + return sysfs_emit(page, "0x%06x\n", subsys->ieee_oui); +} + +static ssize_t nvmet_subsys_attr_ieee_oui_store_locked(struct nvmet_subsys *subsys, + const char *page, size_t count) +{ + uint32_t val = 0; + int ret; + + if (subsys->subsys_discovered) { + pr_err("Can't set IEEE OUI. 0x%06x is already assigned\n", + subsys->ieee_oui); + return -EINVAL; + } + + ret = kstrtou32(page, 0, &val); + if (ret < 0) + return ret; + + if (val >= 0x1000000) + return -EINVAL; + + subsys->ieee_oui = val; + + return count; +} + +static ssize_t nvmet_subsys_attr_ieee_oui_store(struct config_item *item, + const char *page, size_t count) +{ + struct nvmet_subsys *subsys = to_subsys(item); + ssize_t ret; + + down_write(&nvmet_config_sem); + mutex_lock(&subsys->lock); + ret = nvmet_subsys_attr_ieee_oui_store_locked(subsys, page, count); + mutex_unlock(&subsys->lock); + up_write(&nvmet_config_sem); + + return ret; +} +CONFIGFS_ATTR(nvmet_subsys_, attr_ieee_oui); + +static ssize_t nvmet_subsys_attr_firmware_show(struct config_item *item, + char *page) +{ + struct nvmet_subsys *subsys = to_subsys(item); + + return sysfs_emit(page, "%s\n", subsys->firmware_rev); +} + +static ssize_t nvmet_subsys_attr_firmware_store_locked(struct nvmet_subsys *subsys, + const char *page, size_t count) +{ + int pos = 0, len; + char *val; + + if (subsys->subsys_discovered) { + pr_err("Can't set firmware revision. %s is already assigned\n", + subsys->firmware_rev); + return -EINVAL; + } + + len = strcspn(page, "\n"); + if (!len) + return -EINVAL; + + if (len > NVMET_FR_MAX_SIZE) { + pr_err("Firmware revision size can not exceed %d Bytes\n", + NVMET_FR_MAX_SIZE); + return -EINVAL; + } + + for (pos = 0; pos < len; pos++) { + if (!nvmet_is_ascii(page[pos])) + return -EINVAL; + } + + val = kmemdup_nul(page, len, GFP_KERNEL); + if (!val) + return -ENOMEM; + + kfree(subsys->firmware_rev); + + subsys->firmware_rev = val; + + return count; +} + +static ssize_t nvmet_subsys_attr_firmware_store(struct config_item *item, + const char *page, size_t count) +{ + struct nvmet_subsys *subsys = to_subsys(item); + ssize_t ret; + + down_write(&nvmet_config_sem); + mutex_lock(&subsys->lock); + ret = nvmet_subsys_attr_firmware_store_locked(subsys, page, count); + mutex_unlock(&subsys->lock); + up_write(&nvmet_config_sem); + + return ret; +} +CONFIGFS_ATTR(nvmet_subsys_, attr_firmware); + #ifdef CONFIG_BLK_DEV_INTEGRITY static ssize_t nvmet_subsys_attr_pi_enable_show(struct config_item *item, char *page) @@ -1275,7 +1386,7 @@ static ssize_t nvmet_subsys_attr_pi_enable_store(struct config_item *item, struct nvmet_subsys *subsys = to_subsys(item); bool pi_enable; - if (strtobool(page, &pi_enable)) + if (kstrtobool(page, &pi_enable)) return -EINVAL; subsys->pi_support = pi_enable; @@ -1293,6 +1404,8 @@ static ssize_t nvmet_subsys_attr_qid_max_show(struct config_item *item, static ssize_t nvmet_subsys_attr_qid_max_store(struct config_item *item, const char *page, size_t cnt) { + struct nvmet_subsys *subsys = to_subsys(item); + struct nvmet_ctrl *ctrl; u16 qid_max; if (sscanf(page, "%hu\n", &qid_max) != 1) @@ -1302,8 +1415,13 @@ static ssize_t nvmet_subsys_attr_qid_max_store(struct config_item *item, return -EINVAL; down_write(&nvmet_config_sem); - to_subsys(item)->max_qid = qid_max; + subsys->max_qid = qid_max; + + /* Force reconnect */ + list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) + ctrl->ops->delete_ctrl(ctrl); up_write(&nvmet_config_sem); + return cnt; } CONFIGFS_ATTR(nvmet_subsys_, attr_qid_max); @@ -1316,6 +1434,8 @@ static struct configfs_attribute *nvmet_subsys_attrs[] = { &nvmet_subsys_attr_attr_cntlid_max, &nvmet_subsys_attr_attr_model, &nvmet_subsys_attr_attr_qid_max, + &nvmet_subsys_attr_attr_ieee_oui, + &nvmet_subsys_attr_attr_firmware, #ifdef CONFIG_BLK_DEV_INTEGRITY &nvmet_subsys_attr_attr_pi_enable, #endif @@ -1395,7 +1515,7 @@ static ssize_t nvmet_referral_enable_store(struct config_item *item, struct nvmet_port *port = to_nvmet_port(item); bool enable; - if (strtobool(page, &enable)) + if (kstrtobool(page, &enable)) goto inval; if (enable) |