Merge tag 'uuid-for-4.13-2' of git://git.infradead.org/users/hch/uuid

[linux.git] / drivers / nvme / target / configfs.c

diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c
index a358ecd93e110bcbc0331fc77ad22303c0099876..0a0067e771f59d89114a07b5e12b307b820b2670 100644 (file)
--- a/drivers/nvme/target/configfs.c
+++ b/drivers/nvme/target/configfs.c
@@ -650,7 +650,7 @@ static ssize_t nvmet_subsys_attr_allow_any_host_store(struct config_item *item,
 
 CONFIGFS_ATTR(nvmet_subsys_, attr_allow_any_host);
 
-static ssize_t nvmet_subsys_version_show(struct config_item *item,
+static ssize_t nvmet_subsys_attr_version_show(struct config_item *item,
                                              char *page)
 {
        struct nvmet_subsys *subsys = to_subsys(item);
@@ -666,7 +666,7 @@ static ssize_t nvmet_subsys_version_show(struct config_item *item,
                                (int)NVME_MINOR(subsys->ver));
 }
 
-static ssize_t nvmet_subsys_version_store(struct config_item *item,
+static ssize_t nvmet_subsys_attr_version_store(struct config_item *item,
                                               const char *page, size_t count)
 {
        struct nvmet_subsys *subsys = to_subsys(item);
@@ -684,11 +684,33 @@ static ssize_t nvmet_subsys_version_store(struct config_item *item,
 
        return count;
 }
-CONFIGFS_ATTR(nvmet_subsys_, version);
+CONFIGFS_ATTR(nvmet_subsys_, attr_version);
+
+static ssize_t nvmet_subsys_attr_serial_show(struct config_item *item,
+                                            char *page)
+{
+       struct nvmet_subsys *subsys = to_subsys(item);
+
+       return snprintf(page, PAGE_SIZE, "%llx\n", subsys->serial);
+}
+
+static ssize_t nvmet_subsys_attr_serial_store(struct config_item *item,
+                                             const char *page, size_t count)
+{
+       struct nvmet_subsys *subsys = to_subsys(item);
+
+       down_write(&nvmet_config_sem);
+       sscanf(page, "%llx\n", &subsys->serial);
+       up_write(&nvmet_config_sem);
+
+       return count;
+}
+CONFIGFS_ATTR(nvmet_subsys_, attr_serial);
 
 static struct configfs_attribute *nvmet_subsys_attrs[] = {
        &nvmet_subsys_attr_attr_allow_any_host,
-       &nvmet_subsys_attr_version,
+       &nvmet_subsys_attr_attr_version,
+       &nvmet_subsys_attr_attr_serial,
        NULL,
 };