diff options
Diffstat (limited to 'drivers/nvme/target')
| -rw-r--r-- | drivers/nvme/target/configfs.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c index 83bfe28fe7da..a358ecd93e11 100644 --- a/drivers/nvme/target/configfs.c +++ b/drivers/nvme/target/configfs.c @@ -650,8 +650,45 @@ out_unlock: CONFIGFS_ATTR(nvmet_subsys_, attr_allow_any_host); +static ssize_t nvmet_subsys_version_show(struct config_item *item, + char *page) +{ + struct nvmet_subsys *subsys = to_subsys(item); + + if (NVME_TERTIARY(subsys->ver)) + return snprintf(page, PAGE_SIZE, "%d.%d.%d\n", + (int)NVME_MAJOR(subsys->ver), + (int)NVME_MINOR(subsys->ver), + (int)NVME_TERTIARY(subsys->ver)); + else + return snprintf(page, PAGE_SIZE, "%d.%d\n", + (int)NVME_MAJOR(subsys->ver), + (int)NVME_MINOR(subsys->ver)); +} + +static ssize_t nvmet_subsys_version_store(struct config_item *item, + const char *page, size_t count) +{ + struct nvmet_subsys *subsys = to_subsys(item); + int major, minor, tertiary = 0; + int ret; + + + ret = sscanf(page, "%d.%d.%d\n", &major, &minor, &tertiary); + if (ret != 2 && ret != 3) + return -EINVAL; + + down_write(&nvmet_config_sem); + subsys->ver = NVME_VS(major, minor, tertiary); + up_write(&nvmet_config_sem); + + return count; +} +CONFIGFS_ATTR(nvmet_subsys_, version); + static struct configfs_attribute *nvmet_subsys_attrs[] = { &nvmet_subsys_attr_attr_allow_any_host, + &nvmet_subsys_attr_version, NULL, }; |