netlabel: Add support for enumerating the CALIPSO DOI list.
Enumerate the DOI list through the NLBL_CALIPSO_C_LISTALL command.
It takes no attributes.
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
diff --git a/net/netlabel/netlabel_calipso.c b/net/netlabel/netlabel_calipso.c
index 6161170..2141145 100644
--- a/net/netlabel/netlabel_calipso.c
+++ b/net/netlabel/netlabel_calipso.c
@@ -46,6 +46,13 @@
#include "netlabel_mgmt.h"
#include "netlabel_domainhash.h"
+/* Argument struct for calipso_doi_walk() */
+struct netlbl_calipso_doiwalk_arg {
+ struct netlink_callback *nl_cb;
+ struct sk_buff *skb;
+ u32 seq;
+};
+
/* NetLabel Generic NETLINK CALIPSO family */
static struct genl_family netlbl_calipso_gnl_family = {
.id = GENL_ID_GENERATE,
@@ -183,6 +190,73 @@
return ret_val;
}
+/**
+ * netlbl_calipso_listall_cb - calipso_doi_walk() callback for LISTALL
+ * @doi_def: the CALIPSO DOI definition
+ * @arg: the netlbl_calipso_doiwalk_arg structure
+ *
+ * Description:
+ * This function is designed to be used as a callback to the
+ * calipso_doi_walk() function for use in generating a response for a LISTALL
+ * message. Returns the size of the message on success, negative values on
+ * failure.
+ *
+ */
+static int netlbl_calipso_listall_cb(struct calipso_doi *doi_def, void *arg)
+{
+ int ret_val = -ENOMEM;
+ struct netlbl_calipso_doiwalk_arg *cb_arg = arg;
+ void *data;
+
+ data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid,
+ cb_arg->seq, &netlbl_calipso_gnl_family,
+ NLM_F_MULTI, NLBL_CALIPSO_C_LISTALL);
+ if (!data)
+ goto listall_cb_failure;
+
+ ret_val = nla_put_u32(cb_arg->skb, NLBL_CALIPSO_A_DOI, doi_def->doi);
+ if (ret_val != 0)
+ goto listall_cb_failure;
+ ret_val = nla_put_u32(cb_arg->skb,
+ NLBL_CALIPSO_A_MTYPE,
+ doi_def->type);
+ if (ret_val != 0)
+ goto listall_cb_failure;
+
+ genlmsg_end(cb_arg->skb, data);
+ return 0;
+
+listall_cb_failure:
+ genlmsg_cancel(cb_arg->skb, data);
+ return ret_val;
+}
+
+/**
+ * netlbl_calipso_listall - Handle a LISTALL message
+ * @skb: the NETLINK buffer
+ * @cb: the NETLINK callback
+ *
+ * Description:
+ * Process a user generated LISTALL message and respond accordingly. Returns
+ * zero on success and negative values on error.
+ *
+ */
+static int netlbl_calipso_listall(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ struct netlbl_calipso_doiwalk_arg cb_arg;
+ u32 doi_skip = cb->args[0];
+
+ cb_arg.nl_cb = cb;
+ cb_arg.skb = skb;
+ cb_arg.seq = cb->nlh->nlmsg_seq;
+
+ calipso_doi_walk(&doi_skip, netlbl_calipso_listall_cb, &cb_arg);
+
+ cb->args[0] = doi_skip;
+ return skb->len;
+}
+
/* NetLabel Generic NETLINK Command Definitions
*/
@@ -201,6 +275,13 @@
.doit = netlbl_calipso_list,
.dumpit = NULL,
},
+ {
+ .cmd = NLBL_CALIPSO_C_LISTALL,
+ .flags = 0,
+ .policy = calipso_genl_policy,
+ .doit = NULL,
+ .dumpit = netlbl_calipso_listall,
+ },
};
/* NetLabel Generic NETLINK Protocol Functions
@@ -316,3 +397,28 @@
if (ops)
ops->doi_putdef(doi_def);
}
+
+/**
+ * calipso_doi_walk - Iterate through the DOI definitions
+ * @skip_cnt: skip past this number of DOI definitions, updated
+ * @callback: callback for each DOI definition
+ * @cb_arg: argument for the callback function
+ *
+ * Description:
+ * Iterate over the DOI definition list, skipping the first @skip_cnt entries.
+ * For each entry call @callback, if @callback returns a negative value stop
+ * 'walking' through the list and return. Updates the value in @skip_cnt upon
+ * return. Returns zero on success, negative values on failure.
+ *
+ */
+int calipso_doi_walk(u32 *skip_cnt,
+ int (*callback)(struct calipso_doi *doi_def, void *arg),
+ void *cb_arg)
+{
+ int ret_val = -ENOMSG;
+ const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get();
+
+ if (ops)
+ ret_val = ops->doi_walk(skip_cnt, callback, cb_arg);
+ return ret_val;
+}