@@ -659,6 +659,16 @@ static ssize_t remote_ip_store(struct config_item *item, const char *buf,
return ret;
}
+/* Count number of entries we have in extradata.
+ * This is important because the extradata_complete only supports
+ * MAX_EXTRADATA_ITEMS entries. Before enabling any new {user,sys}data
+ * feature, number of entries needs to checked for available space.
+ */
+static size_t count_extradata_entries(struct netconsole_target *nt)
+{
+ return list_count_nodes(&nt->userdata_group.cg_children);
+}
+
static ssize_t remote_mac_store(struct config_item *item, const char *buf,
size_t count)
{
@@ -808,15 +818,13 @@ static struct config_item *userdatum_make_item(struct config_group *group,
struct netconsole_target *nt;
struct userdatum *udm;
struct userdata *ud;
- size_t child_count;
if (strlen(name) > MAX_EXTRADATA_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
ud = to_userdata(&group->cg_item);
nt = userdata_to_target(ud);
- child_count = list_count_nodes(&nt->userdata_group.cg_children);
- if (child_count >= MAX_EXTRADATA_ITEMS)
+ if (count_extradata_entries(nt) >= MAX_EXTRADATA_ITEMS)
return ERR_PTR(-ENOSPC);
udm = kzalloc(sizeof(*udm), GFP_KERNEL);
Add a helper function nr_extradata_entries() to count the number of used extradata entries in a netconsole target. This refactors the duplicate code for counting entries into a single function, which will be reused by upcoming CPU sysdata changes. The helper uses list_count_nodes() to count the number of children in the userdata group configfs hierarchy. Signed-off-by: Breno Leitao <leitao@debian.org> --- drivers/net/netconsole.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-)