This commit adds the read-write attribute "dbroot", in
the top-level CONFIGFS (core) target directory,
normally /sys/kernel/config/target. This attribute
defaults to "/var/target" but can be changed by
writing a new pathname string to it.
Target modules that care about the target database
root directory will be modified to use this
attribute in a future commit.
---
drivers/target/target_core_configfs.c | 31 +++++++++++++++++++++++++++++++
drivers/target/target_core_internal.h | 6 ++++++
2 files changed, 37 insertions(+)
diff --git a/drivers/target/target_core_configfs.c
b/drivers/target/target_core_configfs.c
index 713c63d9681b..bfc5a8bb5778 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -99,6 +99,36 @@ static ssize_t target_core_item_version_show(struct
config_item *item,
CONFIGFS_ATTR_RO(target_core_item_, version);
+char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
+
+static ssize_t target_core_item_dbroot_show(struct config_item *item,
+ char *page)
+{
+ return sprintf(page, "%s\n", db_root);
+}
+
+static ssize_t target_core_item_dbroot_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ ssize_t read_bytes;
+
+ if (count > (DB_ROOT_LEN - 1)) {
+ pr_err("db_root count: %d exceeds DB_ROOT_LEN-1: %u\n",
+ (int)count, DB_ROOT_LEN - 1);
+ return -EINVAL;
+ }
+
+ read_bytes = snprintf(db_root, DB_ROOT_LEN, "%s", page);
+ if (!read_bytes)
+ return -EINVAL;
+ if (db_root[read_bytes - 1] == '\n')
+ db_root[read_bytes - 1] = '\0';
+
+ return read_bytes;
+}
+
+CONFIGFS_ATTR(target_core_item_, dbroot);
+
static struct target_fabric_configfs *target_core_get_fabric(
const char *name)
{
@@ -249,6 +279,7 @@ static struct configfs_group_operations
target_core_fabric_group_ops = {
*/
static struct configfs_attribute *target_core_fabric_item_attrs[] = {
&target_core_item_attr_version,
+ &target_core_item_attr_dbroot,
NULL,
};
diff --git a/drivers/target/target_core_internal.h
b/drivers/target/target_core_internal.h
index 040cf5202e54..c2a18b960c5d 100644
--- a/drivers/target/target_core_internal.h
+++ b/drivers/target/target_core_internal.h
@@ -156,4 +156,10 @@ void
target_stat_setup_mappedlun_default_groups(struct se_lun_acl *);
/* target_core_xcopy.c */
extern struct se_portal_group xcopy_pt_tpg;
+/* target_core_configfs.c */
+#define DB_ROOT_LEN 4096
+#define DB_ROOT_DEFAULT "/var/target"
+
+extern char db_root[];
+
#endif /* TARGET_CORE_INTERNAL_H */
--
2.1.4
--
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