Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 212 insertions, 0 deletions

diff --git a/src/libsystemd/sd-netlink/netlink-internal.h b/src/libsystemd/sd-netlink/netlink-internal.h
new file mode 100644
index 0000000..891d3e8
--- /dev/null
+++ b/src/libsystemd/sd-netlink/netlink-internal.h
@@ -0,0 +1,212 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <linux/netlink.h>
+
+#include "sd-netlink.h"
+
+#include "list.h"
+#include "netlink-types.h"
+#include "ordered-set.h"
+#include "prioq.h"
+#include "time-util.h"
+
+#define NETLINK_DEFAULT_TIMEOUT_USEC ((usec_t) (25 * USEC_PER_SEC))
+
+#define NETLINK_RQUEUE_MAX 64*1024
+
+#define NETLINK_CONTAINER_DEPTH 32
+
+struct reply_callback {
+        sd_netlink_message_handler_t callback;
+        usec_t timeout;
+        uint32_t serial;
+        unsigned prioq_idx;
+};
+
+struct match_callback {
+        sd_netlink_message_handler_t callback;
+        uint32_t *groups;
+        size_t n_groups;
+        uint16_t type;
+        uint8_t cmd; /* used by genl */
+
+        LIST_FIELDS(struct match_callback, match_callbacks);
+};
+
+typedef enum NetlinkSlotType {
+        NETLINK_REPLY_CALLBACK,
+        NETLINK_MATCH_CALLBACK,
+        _NETLINK_SLOT_INVALID = -EINVAL,
+} NetlinkSlotType;
+
+struct sd_netlink_slot {
+        unsigned n_ref;
+        NetlinkSlotType type:8;
+        bool floating;
+        sd_netlink *netlink;
+        void *userdata;
+        sd_netlink_destroy_t destroy_callback;
+
+        char *description;
+
+        LIST_FIELDS(sd_netlink_slot, slots);
+
+        union {
+                struct reply_callback reply_callback;
+                struct match_callback match_callback;
+        };
+};
+
+struct sd_netlink {
+        unsigned n_ref;
+
+        int fd;
+
+        union {
+                struct sockaddr sa;
+                struct sockaddr_nl nl;
+        } sockaddr;
+
+        int protocol;
+
+        Hashmap *broadcast_group_refs;
+        bool broadcast_group_dont_leave:1; /* until we can rely on 4.2 */
+
+        OrderedSet *rqueue;
+        Hashmap *rqueue_by_serial;
+        Hashmap *rqueue_partial_by_serial;
+
+        struct nlmsghdr *rbuffer;
+
+        bool processing:1;
+
+        uint32_t serial;
+
+        struct Prioq *reply_callbacks_prioq;
+        Hashmap *reply_callbacks;
+
+        LIST_HEAD(struct match_callback, match_callbacks);
+
+        LIST_HEAD(sd_netlink_slot, slots);
+
+        pid_t original_pid;
+
+        sd_event_source *io_event_source;
+        sd_event_source *time_event_source;
+        sd_event_source *exit_event_source;
+        sd_event *event;
+
+        Hashmap *genl_family_by_name;
+        Hashmap *genl_family_by_id;
+};
+
+struct netlink_attribute {
+        size_t offset; /* offset from hdr to attribute */
+        bool nested:1;
+        bool net_byteorder:1;
+};
+
+struct netlink_container {
+        const struct NLAPolicySet *policy_set; /* the policy set of the container */
+        size_t offset; /* offset from hdr to the start of the container */
+        struct netlink_attribute *attributes;
+        uint16_t max_attribute; /* the maximum attribute in container */
+};
+
+struct sd_netlink_message {
+        unsigned n_ref;
+
+        int protocol;
+
+        struct nlmsghdr *hdr;
+        struct netlink_container containers[NETLINK_CONTAINER_DEPTH];
+        unsigned n_containers; /* number of containers */
+        uint32_t multicast_group;
+        bool sealed:1;
+
+        sd_netlink_message *next; /* next in a chain of multi-part messages */
+};
+
+int message_new_empty(sd_netlink *nl, sd_netlink_message **ret);
+int message_new_full(
+                sd_netlink *nl,
+                uint16_t nlmsg_type,
+                const NLAPolicySet *policy_set,
+                size_t header_size,
+                sd_netlink_message **ret);
+int message_new(sd_netlink *nl, sd_netlink_message **ret, uint16_t type);
+int message_new_synthetic_error(sd_netlink *nl, int error, uint32_t serial, sd_netlink_message **ret);
+
+static inline uint32_t message_get_serial(sd_netlink_message *m) {
+        assert(m);
+        return ASSERT_PTR(m->hdr)->nlmsg_seq;
+}
+
+void message_seal(sd_netlink_message *m);
+
+int netlink_open_family(sd_netlink **ret, int family);
+bool netlink_pid_changed(sd_netlink *nl);
+
+int socket_bind(sd_netlink *nl);
+int socket_broadcast_group_ref(sd_netlink *nl, unsigned group);
+int socket_broadcast_group_unref(sd_netlink *nl, unsigned group);
+int socket_write_message(sd_netlink *nl, sd_netlink_message *m);
+int socket_read_message(sd_netlink *nl);
+
+int netlink_add_match_internal(
+                sd_netlink *nl,
+                sd_netlink_slot **ret_slot,
+                const uint32_t *groups,
+                size_t n_groups,
+                uint16_t type,
+                uint8_t cmd,
+                sd_netlink_message_handler_t callback,
+                sd_netlink_destroy_t destroy_callback,
+                void *userdata,
+                const char *description);
+
+/* Make sure callbacks don't destroy the netlink connection */
+#define NETLINK_DONT_DESTROY(nl) \
+        _cleanup_(sd_netlink_unrefp) _unused_ sd_netlink *_dont_destroy_##nl = sd_netlink_ref(nl)
+
+bool nfproto_is_valid(int nfproto);
+
+/* nfnl */
+/* TODO: to be exported later */
+int sd_nfnl_socket_open(sd_netlink **ret);
+int sd_nfnl_send_batch(
+                sd_netlink *nfnl,
+                sd_netlink_message **messages,
+                size_t msgcount,
+                uint32_t **ret_serials);
+int sd_nfnl_call_batch(
+                sd_netlink *nfnl,
+                sd_netlink_message **messages,
+                size_t n_messages,
+                uint64_t usec,
+                sd_netlink_message ***ret_messages);
+int sd_nfnl_message_new(
+                sd_netlink *nfnl,
+                sd_netlink_message **ret,
+                int nfproto,
+                uint16_t subsys,
+                uint16_t msg_type,
+                uint16_t flags);
+int sd_nfnl_nft_message_new_table(sd_netlink *nfnl, sd_netlink_message **ret,
+                                  int nfproto, const char *table);
+int sd_nfnl_nft_message_new_basechain(sd_netlink *nfnl, sd_netlink_message **ret,
+                                      int nfproto, const char *table, const char *chain,
+                                      const char *type, uint8_t hook, int prio);
+int sd_nfnl_nft_message_new_rule(sd_netlink *nfnl, sd_netlink_message **ret,
+                                 int nfproto, const char *table, const char *chain);
+int sd_nfnl_nft_message_new_set(sd_netlink *nfnl, sd_netlink_message **ret,
+                                int nfproto, const char *table, const char *set_name,
+                                uint32_t setid, uint32_t klen);
+int sd_nfnl_nft_message_new_setelems(sd_netlink *nfnl, sd_netlink_message **ret,
+                                     int add, int nfproto, const char *table, const char *set_name);
+int sd_nfnl_nft_message_append_setelem(sd_netlink_message *m,
+                                       uint32_t index,
+                                       const void *key, size_t key_len,
+                                       const void *data, size_t data_len,
+                                       uint32_t flags);