diff options
Diffstat (limited to 'drivers/nvme/target/configfs.c')
| -rw-r--r-- | drivers/nvme/target/configfs.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c index 2bcd60758919..e34a2896fedb 100644 --- a/drivers/nvme/target/configfs.c +++ b/drivers/nvme/target/configfs.c @@ -1281,6 +1281,34 @@ static ssize_t nvmet_subsys_attr_pi_enable_store(struct config_item *item, CONFIGFS_ATTR(nvmet_subsys_, attr_pi_enable); #endif +static ssize_t nvmet_subsys_attr_qid_max_show(struct config_item *item, + char *page) +{ + return snprintf(page, PAGE_SIZE, "%u\n", to_subsys(item)->max_qid); +} + +static ssize_t nvmet_subsys_attr_qid_max_store(struct config_item *item, + const char *page, size_t cnt) +{ + struct nvmet_port *port = to_nvmet_port(item); + u16 qid_max; + + if (nvmet_is_port_enabled(port, __func__)) + return -EACCES; + + if (sscanf(page, "%hu\n", &qid_max) != 1) + return -EINVAL; + + if (qid_max < 1 || qid_max > NVMET_NR_QUEUES) + return -EINVAL; + + down_write(&nvmet_config_sem); + to_subsys(item)->max_qid = qid_max; + up_write(&nvmet_config_sem); + return cnt; +} +CONFIGFS_ATTR(nvmet_subsys_, attr_qid_max); + static struct configfs_attribute *nvmet_subsys_attrs[] = { &nvmet_subsys_attr_attr_allow_any_host, &nvmet_subsys_attr_attr_version, @@ -1288,6 +1316,7 @@ static struct configfs_attribute *nvmet_subsys_attrs[] = { &nvmet_subsys_attr_attr_cntlid_min, &nvmet_subsys_attr_attr_cntlid_max, &nvmet_subsys_attr_attr_model, + &nvmet_subsys_attr_attr_qid_max, #ifdef CONFIG_BLK_DEV_INTEGRITY &nvmet_subsys_attr_attr_pi_enable, #endif |