* Copyright (C) 2013 Kay Sievers
* Copyright (C) 2013 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Copyright (C) 2013 Linux Foundation
+ * Copyright (C) 2013 Lennart Poettering
+ * Copyright (C) 2013 Daniel Mack <daniel@zonque.org>
*
* kdbus is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the
#endif
#define KDBUS_IOC_MAGIC 0x95
+#define KDBUS_SRC_ID_KERNEL (0)
+#define KDBUS_DST_ID_WELL_KNOWN_NAME (0)
+#define KDBUS_MATCH_SRC_ID_ANY (~0ULL)
+#define KDBUS_DST_ID_BROADCAST (~0ULL)
+
+/* Common first elements in a structure which are used to iterate over
+ * a list of elements. */
+#define KDBUS_PART_HEADER \
+ struct { \
+ __u64 size; \
+ __u64 type; \
+ }
/* Message sent from kernel to userspace, when the owner or starter of
* a well-known name changes */
struct kdbus_manager_msg_name_change {
__u64 old_id;
__u64 new_id;
- __u64 flags; /* 0 or (possibly?) KDBUS_CMD_NAME_IN_QUEUE */
+ __u64 flags; /* 0 or (possibly?) KDBUS_NAME_IN_QUEUE */
char name[0];
};
struct kdbus_manager_msg_id_change {
__u64 id;
- __u64 flags; /* The kernel flags field from KDBUS_CMD_HELLO */
+ __u64 flags; /* The kernel flags field from KDBUS_HELLO */
};
struct kdbus_creds {
__u64 realtime_ns;
};
-#define KDBUS_SRC_ID_KERNEL (0)
-#define KDBUS_DST_ID_WELL_KNOWN_NAME (0)
-#define KDBUS_MATCH_SRC_ID_ANY (~0ULL)
-#define KDBUS_DST_ID_BROADCAST (~0ULL)
+struct kdbus_vec {
+ __u64 size;
+ union {
+ __u64 address;
+ __u64 offset;
+ };
+};
-/* Message Data Types */
+struct kdbus_memfd {
+ __u64 size;
+ int fd;
+ __u32 __pad;
+};
+
+/* Message Item Types */
enum {
+ _KDBUS_MSG_NULL,
+
/* Filled in by userspace */
- KDBUS_MSG_NULL, /* empty record */
- KDBUS_MSG_PAYLOAD, /* .data */
- KDBUS_MSG_PAYLOAD_VEC, /* .data_vec */
- KDBUS_MSG_UNIX_FDS, /* .data_fds of file descriptors */
+ KDBUS_MSG_PAYLOAD_VEC, /* .data_vec, reference to memory area */
+ KDBUS_MSG_PAYLOAD_OFF, /* .data_vec, reference to memory area */
+ KDBUS_MSG_PAYLOAD_MEMFD, /* file descriptor of a special data file */
+ KDBUS_MSG_FDS, /* .data_fds of file descriptors */
KDBUS_MSG_BLOOM, /* for broadcasts, carries bloom filter blob in .data */
KDBUS_MSG_DST_NAME, /* destination's well-known name, in .str */
+ KDBUS_MSG_PRIORITY, /* queue priority for message */
/* Filled in by kernelspace */
- KDBUS_MSG_SRC_NAMES = 0x200,/* NUL separated string list with well-known names of source */
+ KDBUS_MSG_SRC_NAMES = 0x400,/* NUL separated string list with well-known names of source */
KDBUS_MSG_TIMESTAMP, /* .timestamp */
KDBUS_MSG_SRC_CREDS, /* .creds */
KDBUS_MSG_SRC_PID_COMM, /* optional, in .str */
KDBUS_MSG_SRC_AUDIT, /* .audit */
/* Special messages from kernel, consisting of one and only one of these data blocks */
- KDBUS_MSG_NAME_ADD = 0x400,/* .name_change */
+ KDBUS_MSG_NAME_ADD = 0x800,/* .name_change */
KDBUS_MSG_NAME_REMOVE, /* .name_change */
KDBUS_MSG_NAME_CHANGE, /* .name_change */
KDBUS_MSG_ID_ADD, /* .id_change */
KDBUS_MSG_ID_REMOVE, /* .id_change */
- KDBUS_MSG_ID_CHANGE, /* .id_change */
KDBUS_MSG_REPLY_TIMEOUT, /* empty, but .reply_cookie in .kdbus_msg is filled in */
KDBUS_MSG_REPLY_DEAD, /* dito */
};
-struct kdbus_vec {
- __u64 address;
- __u64 size;
-};
-
/**
- * struct kdbus_msg_data - chain of data blocks
+ * struct kdbus_item - chain of data blocks
*
* size: overall data record size
- * type: kdbus_msg_data_type of data
+ * type: kdbus_item type of data
*/
-struct kdbus_msg_data {
- __u64 size;
- __u64 type;
+struct kdbus_item {
+ KDBUS_PART_HEADER;
union {
/* inline data */
__u8 data[0];
+ __u32 data32[0];
+ __u64 data64[0];
char str[0];
+ /* connection */
+ __u64 id;
+
/* data vector */
struct kdbus_vec vec;
- /* specific fields */
- int fds[0]; /* int array of file descriptors */
+ /* process credentials and properties*/
struct kdbus_creds creds;
struct kdbus_audit audit;
struct kdbus_timestamp timestamp;
+
+ /* specific fields */
+ struct kdbus_memfd memfd;
+ int fds[0];
struct kdbus_manager_msg_name_change name_change;
struct kdbus_manager_msg_id_change id_change;
};
};
enum {
- KDBUS_MSG_FLAGS_EXPECT_REPLY = 1,
- KDBUS_MSG_FLAGS_NO_AUTO_START = 2, /* possibly? */
+ KDBUS_MSG_FLAGS_EXPECT_REPLY = 1 << 0,
+ KDBUS_MSG_FLAGS_NO_AUTO_START = 1 << 1,
};
enum {
- KDBUS_PAYLOAD_NONE = 0,
+ KDBUS_PAYLOAD_KERNEL,
KDBUS_PAYLOAD_DBUS1 = 0x4442757356657231ULL, /* 'DBusVer1' */
KDBUS_PAYLOAD_GVARIANT = 0x4756617269616e74ULL, /* 'GVariant' */
};
* set by userspace:
* dst_id: destination id
* flags: KDBUS_MSG_FLAGS_*
- * data_size: overall message size
- * data: data records
+ * items: data records
*
* set by kernel:
* src_id: who sent the message
struct kdbus_msg {
__u64 size;
__u64 flags;
- __u64 dst_id; /* connection, 0 == name in data, ~0 broadcast */
- __u64 src_id; /* connection, 0 == kernel */
- __u64 payload_type; /* 'DBusVer1', 'GVariant', ... */
- __u64 cookie; /* userspace-supplied cookie */
+ __u64 dst_id; /* connection, 0 == name in data, ~0 broadcast */
+ __u64 src_id; /* connection, 0 == kernel */
+ __u64 payload_type; /* 'DBusVer1', 'GVariant', ... */
+ __u64 cookie; /* userspace-supplied cookie */
union {
__u64 cookie_reply; /* cookie we reply to */
__u64 timeout_ns; /* timespan to wait for reply */
};
- struct kdbus_msg_data data[0];
+ struct kdbus_item items[0];
};
enum {
+ _KDBUS_POLICY_NULL,
KDBUS_POLICY_NAME,
KDBUS_POLICY_ACCESS,
};
enum {
- KDBUS_POLICY_USER,
- KDBUS_POLICY_GROUP,
- KDBUS_POLICY_WORLD,
+ _KDBUS_POLICY_ACCESS_NULL,
+ KDBUS_POLICY_ACCESS_USER,
+ KDBUS_POLICY_ACCESS_GROUP,
+ KDBUS_POLICY_ACCESS_WORLD,
};
enum {
- KDBUS_POLICY_RECV = 4,
- KDBUS_POLICY_SEND = 2,
- KDBUS_POLICY_OWN = 1,
+ KDBUS_POLICY_RECV = 1 << 2,
+ KDBUS_POLICY_SEND = 1 << 1,
+ KDBUS_POLICY_OWN = 1 << 0,
+};
+
+struct kdbus_policy_access {
+ __u64 type; /* USER, GROUP, WORLD */
+ __u64 bits; /* RECV, SEND, OWN */
+ __u64 id; /* uid, gid, 0 */
};
+//FIXME: convert access to access[]
struct kdbus_policy {
- __u64 size;
- __u64 type; /* NAME or ACCESS */
+ KDBUS_PART_HEADER;
union {
char name[0];
- struct {
- __u32 type; /* USER, GROUP, WORLD */
- __u32 bits; /* RECV, SEND, OWN */
- __u64 id; /* uid, gid, 0 */
- } access;
+ struct kdbus_policy_access access;
};
};
+/* A series of KDBUS_POLICY_NAME, plus one or more KDBUS_POLICY_ACCESS */
struct kdbus_cmd_policy {
__u64 size;
- __u8 buffer[0]; /* a series of KDBUS_POLICY_NAME plus one or
- * more KDBUS_POLICY_ACCESS each. */
+ struct kdbus_policy policies[0];
};
+/* Flags for struct kdbus_cmd_hello */
enum {
- KDBUS_CMD_HELLO_STARTER = 1 << 0,
- KDBUS_CMD_HELLO_ACCEPT_FD = 1 << 1,
- KDBUS_CMD_HELLO_ACCEPT_MMAP = 1 << 2,
+ KDBUS_HELLO_STARTER = 1 << 0,
+ KDBUS_HELLO_ACCEPT_FD = 1 << 1,
/* The following have an effect on directed messages only --
* not for broadcasts */
- KDBUS_CMD_HELLO_ATTACH_COMM = 1 << 10,
- KDBUS_CMD_HELLO_ATTACH_EXE = 1 << 11,
- KDBUS_CMD_HELLO_ATTACH_CMDLINE = 1 << 12,
- KDBUS_CMD_HELLO_ATTACH_CGROUP = 1 << 13,
- KDBUS_CMD_HELLO_ATTACH_CAPS = 1 << 14,
- KDBUS_CMD_HELLO_ATTACH_SECLABEL = 1 << 15,
- KDBUS_CMD_HELLO_ATTACH_AUDIT = 1 << 16,
-};
-
-/* Flags for kdbus_cmd_bus_make, kdbus_cmd_ep_make and
- * kdbus_cmd_ns_make */
-enum {
- KDBUS_ACCESS_GROUP = 1,
- KDBUS_ACCESS_WORLD = 2,
- KDBUS_POLICY_OPEN = 4,
+ KDBUS_HELLO_ATTACH_COMM = 1 << 10,
+ KDBUS_HELLO_ATTACH_EXE = 1 << 11,
+ KDBUS_HELLO_ATTACH_CMDLINE = 1 << 12,
+ KDBUS_HELLO_ATTACH_CGROUP = 1 << 13,
+ KDBUS_HELLO_ATTACH_CAPS = 1 << 14,
+ KDBUS_HELLO_ATTACH_SECLABEL = 1 << 15,
+ KDBUS_HELLO_ATTACH_AUDIT = 1 << 16,
};
struct kdbus_cmd_hello {
+ __u64 size;
+
/* userspace → kernel, kernel → userspace */
__u64 conn_flags; /* userspace specifies its
* capabilities and more, kernel
* returns its capabilites and
* more. Kernel might refuse client's
* capabilities by returning an error
- * from KDBUS_CMD_HELLO */
-
- /* userspace → kernel */
- __u64 pid; /* To allow translator services which
- * connect to the bus on behalf of
- * somebody else, allow specifiying
- * the PID of the client to connect on
- * behalf on. Normal clients should
- * pass this as 0 (i.e. to do things
- * under their own PID). Priviliged
- * clients can pass != 0, to operate
- * on behalf of somebody else. */
+ * from KDBUS_HELLO */
/* kernel → userspace */
__u64 bus_flags; /* this is .flags copied verbatim from
* ioctl. It's intended to be useful
* to do negotiation of features of
* the payload that is transfreted. */
- __u64 id; /* peer id */
+ __u64 id; /* id assigned to this connection */
__u64 bloom_size; /* The bloom filter size chosen by the
* bus owner */
+ __u64 pool_size; /* maximum size of pool buffer */
+ struct kdbus_item items[0];
+};
+
+/* Flags for kdbus_cmd_{bus,ep,ns}_make */
+enum {
+ KDBUS_MAKE_ACCESS_GROUP = 1 << 0,
+ KDBUS_MAKE_ACCESS_WORLD = 1 << 1,
+ KDBUS_MAKE_POLICY_OPEN = 1 << 2,
+};
+
+/* Items to append to kdbus_cmd_{bus,ep,ns}_make */
+enum {
+ _KDBUS_MAKE_NULL,
+ KDBUS_MAKE_NAME,
+ KDBUS_MAKE_CRED, /* allow translator services which connect
+ * to the bus on behalf of somebody else,
+ * allow specifiying the credentials of the
+ * client to connect on behalf on. Needs
+ * privileges */
};
struct kdbus_cmd_bus_make {
* copied verbatim into the bus
* structure and returned from
* KDBUS_CMD_HELLO, later */
- __u64 cgroup_id; /* the cgroup hierarchy ID for which
- * to attach cgroup membership paths
- * to messages. 0 if no cgroup data
- * shall be attached. */
- __u64 bloom_size; /* Size of the bloom filter for this bus. */
- char name[0];
+ __u64 bloom_size; /* size of the bloom filter for this bus */
+ struct kdbus_item items[0];
};
struct kdbus_cmd_ep_make {
* same way as for
* KDBUS_CMD_BUS_MAKE. Unused for
* now. */
- char name[0];
+ struct kdbus_item items[0];
};
struct kdbus_cmd_ns_make {
* same way as for
* KDBUS_CMD_BUS_MAKE. Unused for
* now. */
- char name[0];
+ struct kdbus_item items[0];
};
enum {
/* userspace → kernel */
- KDBUS_CMD_NAME_REPLACE_EXISTING = 1,
- KDBUS_CMD_NAME_QUEUE = 2,
- KDBUS_CMD_NAME_ALLOW_REPLACEMENT = 4,
+ KDBUS_NAME_REPLACE_EXISTING = 1 << 0,
+ KDBUS_NAME_QUEUE = 1 << 1,
+ KDBUS_NAME_ALLOW_REPLACEMENT = 1 << 2,
/* kernel → userspace */
- KDBUS_CMD_NAME_IN_QUEUE = 0x200,
+ KDBUS_NAME_IN_QUEUE = 1 << 16,
};
+/* We allow (de)regestration of names of other peers */
struct kdbus_cmd_name {
__u64 size;
- __u64 name_flags;
- __u64 id; /* We allow registration/deregestration of names of other peers */
+ __u64 flags;
+ __u64 id;
__u64 conn_flags;
char name[0];
};
};
enum {
- KDBUS_CMD_NAME_INFO_ITEM_NAME,
- KDBUS_CMD_NAME_INFO_ITEM_SECLABEL,
- KDBUS_CMD_NAME_INFO_ITEM_AUDIT,
-};
-
-struct kdbus_cmd_name_info_item {
- __u64 size;
- __u64 type;
- __u8 data[0];
+ _KDBUS_NAME_INFO_ITEM_NULL,
+ KDBUS_NAME_INFO_ITEM_NAME, /* userspace → kernel */
+ KDBUS_NAME_INFO_ITEM_SECLABEL, /* kernel → userspace */
+ KDBUS_NAME_INFO_ITEM_AUDIT, /* kernel → userspace */
};
struct kdbus_cmd_name_info {
__u64 flags;
__u64 id; /* either ID, or 0 and _ITEM_NAME follows */
struct kdbus_creds creds;
- struct kdbus_cmd_name_info_item item[0]; /* list of item records */
+ struct kdbus_item items[0]; /* list of item records */
};
enum {
- KDBUS_CMD_MATCH_BLOOM, /* Matches a mask blob against KDBUS_MSG_BLOOM */
- KDBUS_CMD_MATCH_SRC_NAME, /* Matches a name string against KDBUS_MSG_SRC_NAMES */
- KDBUS_CMD_MATCH_NAME_ADD, /* Matches a name string against KDBUS_MSG_NAME_ADD */
- KDBUS_CMD_MATCH_NAME_REMOVE, /* Matches a name string against KDBUS_MSG_NAME_REMOVE */
- KDBUS_CMD_MATCH_NAME_CHANGE, /* Matches a name string against KDBUS_MSG_NAME_CHANGE */
- KDBUS_CMD_MATCH_ID_ADD, /* Matches an ID against KDBUS_MSG_ID_ADD */
- KDBUS_CMD_MATCH_ID_REMOVE, /* Matches an ID against KDBUS_MSG_ID_REMOVE */
- KDBUS_CMD_MATCH_ID_CHANGE, /* Matches an ID against KDBUS_MSG_ID_CHANGE */
-};
-
-struct kdbus_cmd_match_item {
- __u64 size;
- __u64 type;
- __u8 data[0];
+ _KDBUS_MATCH_NULL,
+ KDBUS_MATCH_BLOOM, /* Matches a mask blob against KDBUS_MSG_BLOOM */
+ KDBUS_MATCH_SRC_NAME, /* Matches a name string against KDBUS_MSG_SRC_NAMES */
+ KDBUS_MATCH_NAME_ADD, /* Matches a name string against KDBUS_MSG_NAME_ADD */
+ KDBUS_MATCH_NAME_REMOVE, /* Matches a name string against KDBUS_MSG_NAME_REMOVE */
+ KDBUS_MATCH_NAME_CHANGE, /* Matches a name string against KDBUS_MSG_NAME_CHANGE */
+ KDBUS_MATCH_ID_ADD, /* Matches an ID against KDBUS_MSG_ID_ADD */
+ KDBUS_MATCH_ID_REMOVE, /* Matches an ID against KDBUS_MSG_ID_REMOVE */
};
struct kdbus_cmd_match {
__u64 id; /* We allow registration/deregestration of matches for other peers */
__u64 cookie; /* userspace supplied cookie; when removing; kernel deletes everything with same cookie */
__u64 src_id; /* ~0: any. other: exact unique match */
- struct kdbus_cmd_match_item items[0];
+ struct kdbus_item items[0];
};
struct kdbus_cmd_monitor {
__u64 id; /* We allow setting the monitor flag of other peers */
- int enabled; /* A boolean to enable/disable monitoring */
+ unsigned int enable; /* A boolean to enable/disable monitoring */
+ __u32 __pad;
};
/* FD states:
* starter (via KDBUS_CMD_HELLO with KDBUS_CMD_HELLO_STARTER)
* ep owner (via KDBUS_CMD_EP_MAKE)
*/
-enum kdbus_cmd {
+enum {
/* kdbus control node commands: require unset state */
- KDBUS_CMD_BUS_MAKE = _IOWR(KDBUS_IOC_MAGIC, 0x00, struct kdbus_cmd_bus_make),
- KDBUS_CMD_NS_MAKE = _IOWR(KDBUS_IOC_MAGIC, 0x10, struct kdbus_cmd_ns_make),
-
- /* kdbus control node commands: require bus owner state */
- KDBUS_CMD_BUS_POLICY_SET = _IOWR(KDBUS_IOC_MAGIC, 0x20, struct kdbus_cmd_policy),
+ KDBUS_CMD_BUS_MAKE = _IOW(KDBUS_IOC_MAGIC, 0x00, struct kdbus_cmd_bus_make),
+ KDBUS_CMD_NS_MAKE = _IOR(KDBUS_IOC_MAGIC, 0x10, struct kdbus_cmd_ns_make),
/* kdbus ep node commands: require unset state */
- KDBUS_CMD_EP_MAKE = _IOWR(KDBUS_IOC_MAGIC, 0x30, struct kdbus_cmd_ep_make),
- KDBUS_CMD_HELLO = _IOWR(KDBUS_IOC_MAGIC, 0x31, struct kdbus_cmd_hello),
+ KDBUS_CMD_EP_MAKE = _IOW(KDBUS_IOC_MAGIC, 0x20, struct kdbus_cmd_ep_make),
+ KDBUS_CMD_HELLO = _IOWR(KDBUS_IOC_MAGIC, 0x30, struct kdbus_cmd_hello),
/* kdbus ep node commands: require connected state */
- KDBUS_CMD_MSG_SEND = _IOWR(KDBUS_IOC_MAGIC, 0x40, struct kdbus_msg),
- KDBUS_CMD_MSG_RECV = _IOWR(KDBUS_IOC_MAGIC, 0x41, struct kdbus_msg),
+ KDBUS_CMD_MSG_SEND = _IOW(KDBUS_IOC_MAGIC, 0x40, struct kdbus_msg),
+ KDBUS_CMD_MSG_RECV = _IOR(KDBUS_IOC_MAGIC, 0x41, __u64 *),
+ KDBUS_CMD_MSG_RELEASE = _IOW(KDBUS_IOC_MAGIC, 0x42, __u64 *),
KDBUS_CMD_NAME_ACQUIRE = _IOWR(KDBUS_IOC_MAGIC, 0x50, struct kdbus_cmd_name),
- KDBUS_CMD_NAME_RELEASE = _IOWR(KDBUS_IOC_MAGIC, 0x51, struct kdbus_cmd_name),
+ KDBUS_CMD_NAME_RELEASE = _IOW(KDBUS_IOC_MAGIC, 0x51, struct kdbus_cmd_name),
KDBUS_CMD_NAME_LIST = _IOWR(KDBUS_IOC_MAGIC, 0x52, struct kdbus_cmd_names),
KDBUS_CMD_NAME_QUERY = _IOWR(KDBUS_IOC_MAGIC, 0x53, struct kdbus_cmd_name_info),
- KDBUS_CMD_MATCH_ADD = _IOWR(KDBUS_IOC_MAGIC, 0x60, struct kdbus_cmd_match),
- KDBUS_CMD_MATCH_REMOVE = _IOWR(KDBUS_IOC_MAGIC, 0x61, struct kdbus_cmd_match),
- KDBUS_CMD_MONITOR = _IOWR(KDBUS_IOC_MAGIC, 0x62, struct kdbus_cmd_monitor),
+ KDBUS_CMD_MATCH_ADD = _IOW(KDBUS_IOC_MAGIC, 0x60, struct kdbus_cmd_match),
+ KDBUS_CMD_MATCH_REMOVE = _IOW(KDBUS_IOC_MAGIC, 0x61, struct kdbus_cmd_match),
+ KDBUS_CMD_MONITOR = _IOW(KDBUS_IOC_MAGIC, 0x62, struct kdbus_cmd_monitor),
/* kdbus ep node commands: require ep owner state */
- KDBUS_CMD_EP_POLICY_SET = _IOWR(KDBUS_IOC_MAGIC, 0x70, struct kdbus_cmd_policy),
+ KDBUS_CMD_EP_POLICY_SET = _IOW(KDBUS_IOC_MAGIC, 0x70, struct kdbus_cmd_policy),
+
+ /* kdbus memfd commands: */
+ KDBUS_CMD_MEMFD_NEW = _IOR(KDBUS_IOC_MAGIC, 0x80, int *),
+ KDBUS_CMD_MEMFD_SIZE_GET = _IOR(KDBUS_IOC_MAGIC, 0x81, __u64 *),
+ KDBUS_CMD_MEMFD_SIZE_SET = _IOW(KDBUS_IOC_MAGIC, 0x82, __u64 *),
+ KDBUS_CMD_MEMFD_SEAL_GET = _IOR(KDBUS_IOC_MAGIC, 0x83, int *),
+ KDBUS_CMD_MEMFD_SEAL_SET = _IO(KDBUS_IOC_MAGIC, 0x84),
};
#endif
~ianmdlvl / elogind.git / blobdiff