[systemd-commits] src/libsystemd-bus
Kay Sievers
kay at kemper.freedesktop.org
Fri Dec 6 11:42:24 PST 2013
src/libsystemd-bus/bus-kernel.c | 4
src/libsystemd-bus/kdbus.h | 414 +++++++++++++++++++++++++++++-----------
2 files changed, 309 insertions(+), 109 deletions(-)
New commits:
commit 5e16c2575b2edf8f3ca18432a087027662c2621b
Author: Kay Sievers <kay at vrfy.org>
Date: Fri Dec 6 20:19:20 2013 +0100
bus: catch up with latest kdbus changes
diff --git a/src/libsystemd-bus/bus-kernel.c b/src/libsystemd-bus/bus-kernel.c
index f234891..495d7e5 100644
--- a/src/libsystemd-bus/bus-kernel.c
+++ b/src/libsystemd-bus/bus-kernel.c
@@ -1063,7 +1063,7 @@ int bus_kernel_create_bus(const char *name, char **s) {
n = make->items;
sprintf(n->str, "%lu-%s", (unsigned long) getuid(), name);
n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1;
- n->type = KDBUS_MAKE_NAME;
+ n->type = KDBUS_ITEM_MAKE_NAME;
make->size = ALIGN8(offsetof(struct kdbus_cmd_bus_make, items) + n->size);
make->flags = KDBUS_MAKE_POLICY_OPEN;
@@ -1166,7 +1166,7 @@ int bus_kernel_create_namespace(const char *name, char **s) {
n = make->items;
strcpy(n->str, name);
n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1;
- n->type = KDBUS_MAKE_NAME;
+ n->type = KDBUS_ITEM_MAKE_NAME;
make->size = ALIGN8(offsetof(struct kdbus_cmd_ns_make, items) + n->size);
make->flags = KDBUS_MAKE_POLICY_OPEN | KDBUS_MAKE_ACCESS_WORLD;
diff --git a/src/libsystemd-bus/kdbus.h b/src/libsystemd-bus/kdbus.h
index 6775789..d89f8c0 100644
--- a/src/libsystemd-bus/kdbus.h
+++ b/src/libsystemd-bus/kdbus.h
@@ -33,13 +33,13 @@
* @flags: flags from KDBUS_NAME_*
* @name: Well-known name
*
- * Data attached to:
+ * Sent from kernel to userspace when the owner or starter of
+ * a well-known name changes.
+ *
+ * Attached to:
* KDBUS_ITEM_NAME_ADD
* KDBUS_ITEM_NAME_REMOVE
* KDBUS_ITEM_NAME_CHANGE
- *
- * Sent from kernel to userspace when the owner or starter of
- * a well-known name changes.
*/
struct kdbus_notify_name_change {
__u64 old_id;
@@ -53,12 +53,12 @@ struct kdbus_notify_name_change {
* @id: New or former owner of the name
* @flags: flags field from KDBUS_HELLO_*
*
- * Data attached to:
- * KDBUS_ITEM_ID_ADD
- * KDBUS_ITEM_ID_REMOVE
- *
* Sent from kernel to userspace when the owner or starter of
* a well-known name changes.
+ *
+ * Attached to:
+ * KDBUS_ITEM_ID_ADD
+ * KDBUS_ITEM_ID_REMOVE
*/
struct kdbus_notify_id_change {
__u64 id;
@@ -77,6 +77,9 @@ struct kdbus_notify_id_change {
* from the client side. i.e. if you use the PID to look something up in
* /proc/$PID/ you can afterwards check the starttime field of it, to ensure
* you didn't run into a PID overrun.
+ *
+ * Attached to:
+ * KDBUS_ITEM_CREDS
*/
struct kdbus_creds {
__u64 uid;
@@ -90,6 +93,9 @@ struct kdbus_creds {
* struct kdbus_audit - audit information
* @sessionid: The audit session ID
* @loginuid: The audit login uid
+ *
+ * Attached to:
+ * KDBUS_ITEM_AUDIT
*/
struct kdbus_audit {
__u64 sessionid;
@@ -100,6 +106,9 @@ struct kdbus_audit {
* struct kdbus_timestamp
* @monotonic_ns: Monotonic timestamp, in nanoseconds
* @realtime_ns: Realtime timestamp, in nanoseconds
+ *
+ * Attached to:
+ * KDBUS_ITEM_TIMESTAMP
*/
struct kdbus_timestamp {
__u64 monotonic_ns;
@@ -111,6 +120,9 @@ struct kdbus_timestamp {
* @size: The size of the vector
* @address: Memory address for memory addresses
* @offset: Offset in the in-message payload memory
+ *
+ * Attached to:
+ * KDBUS_ITEM_PAYLOAD_VEC
*/
struct kdbus_vec {
__u64 size;
@@ -125,6 +137,9 @@ struct kdbus_vec {
* @size: The memfd's size
* @fd: The file descriptor number
* @__pad: Padding to make the struct aligned
+ *
+ * Attached to:
+ * KDBUS_ITEM_PAYLOAD_MEMFD
*/
struct kdbus_memfd {
__u64 size;
@@ -136,6 +151,9 @@ struct kdbus_memfd {
* struct kdbus_name - a registered well-known name with its flags
* @flags: flags from KDBUS_NAME_*
* @name: well-known name
+ *
+ * Attached to:
+ * KDBUS_ITEM_NAME
*/
struct kdbus_name {
__u64 flags;
@@ -148,6 +166,9 @@ struct kdbus_name {
* @bits: Access to grant. One of KDBUS_POLICY_*
* @id: For KDBUS_POLICY_ACCESS_USER, the uid
* For KDBUS_POLICY_ACCESS_GROUP, the gid
+ *
+ * Embedded in:
+ * struct kdbus_policy
*/
struct kdbus_policy_access {
__u64 type; /* USER, GROUP, WORLD */
@@ -155,14 +176,14 @@ struct kdbus_policy_access {
__u64 id; /* uid, gid, 0 */
};
-/*
- * struct kdbus_policy - a policy to upload
- * @size: The total size of the structure
- * @type: KDBUS_POLICY_NAME or KDBUS_POLICY_ACCESS
- * @name: The well-known name to grant access to,
- * if @type is KDBUS_POLICY_NAME
- * @access: The policy access details,
- * if @type is KDBUS_POLICY_ACCESS
+/**
+ * struct kdbus_policy - a policy item
+ * @access: Policy access details
+ * @name: Well-known name to grant access to
+ *
+ * Attached to:
+ * KDBUS_POLICY_ACCESS
+ * KDBUS_ITEM_POLICY_NAME
*/
struct kdbus_policy {
union {
@@ -171,78 +192,86 @@ struct kdbus_policy {
};
};
-/* Message Item Types */
-enum {
+/* item types to chain data in lists of items */
+enum kdbus_item_type {
_KDBUS_ITEM_NULL,
-
- /* Filled in by userspace */
_KDBUS_ITEM_USER_BASE,
- KDBUS_ITEM_PAYLOAD_VEC = _KDBUS_ITEM_USER_BASE,
- KDBUS_ITEM_PAYLOAD_OFF, /* .data_vec, reference to memory area */
- KDBUS_ITEM_PAYLOAD_MEMFD, /* file descriptor of a special data file */
- KDBUS_ITEM_FDS, /* .data_fds of file descriptors */
- KDBUS_ITEM_BLOOM, /* for broadcasts, carries bloom filter blob in .data */
- KDBUS_ITEM_DST_NAME, /* destination's well-known name, in .str */
+ KDBUS_ITEM_PAYLOAD_VEC = _KDBUS_ITEM_USER_BASE, /* .data_vec */
+ KDBUS_ITEM_PAYLOAD_OFF, /* data at returned offset in the pool */
+ KDBUS_ITEM_PAYLOAD_MEMFD, /* data as sealed memfd */
+ KDBUS_ITEM_FDS, /* attached file descriptors */
+ KDBUS_ITEM_BLOOM, /* for broadcasts, carries bloom filter */
+ KDBUS_ITEM_DST_NAME, /* destination's well-known name */
KDBUS_ITEM_PRIORITY, /* queue priority for message */
+ KDBUS_ITEM_MAKE_NAME,
_KDBUS_ITEM_POLICY_BASE = 0x400,
KDBUS_ITEM_POLICY_NAME = _KDBUS_ITEM_POLICY_BASE,
KDBUS_ITEM_POLICY_ACCESS,
- /* Filled in by kernelspace */
_KDBUS_ITEM_ATTACH_BASE = 0x600,
KDBUS_ITEM_NAME = _KDBUS_ITEM_ATTACH_BASE,
- KDBUS_ITEM_STARTER_NAME, /* Only used in HELLO for starter connection */
- KDBUS_ITEM_TIMESTAMP, /* .timestamp */
- KDBUS_ITEM_CREDS, /* .creds */
- KDBUS_ITEM_PID_COMM, /* optional, in .str */
- KDBUS_ITEM_TID_COMM, /* optional, in .str */
- KDBUS_ITEM_EXE, /* optional, in .str */
- KDBUS_ITEM_CMDLINE, /* optional, in .str (a chain of NUL str) */
- KDBUS_ITEM_CGROUP, /* optional, in .str */
- KDBUS_ITEM_CAPS, /* caps data blob, in .data */
- KDBUS_ITEM_SECLABEL, /* NUL terminated string, in .str */
- KDBUS_ITEM_AUDIT, /* .audit */
-
- /* Special messages from kernel, consisting of one and only one of these data blocks */
+ KDBUS_ITEM_STARTER_NAME,
+ KDBUS_ITEM_TIMESTAMP,
+ KDBUS_ITEM_CREDS,
+ KDBUS_ITEM_PID_COMM,
+ KDBUS_ITEM_TID_COMM,
+ KDBUS_ITEM_EXE,
+ KDBUS_ITEM_CMDLINE,
+ KDBUS_ITEM_CGROUP,
+ KDBUS_ITEM_CAPS,
+ KDBUS_ITEM_SECLABEL,
+ KDBUS_ITEM_AUDIT,
+
+ /* Special messages from kernel */
_KDBUS_ITEM_KERNEL_BASE = 0x800,
KDBUS_ITEM_NAME_ADD = _KDBUS_ITEM_KERNEL_BASE,
KDBUS_ITEM_NAME_REMOVE, /* .name_change */
KDBUS_ITEM_NAME_CHANGE, /* .name_change */
KDBUS_ITEM_ID_ADD, /* .id_change */
KDBUS_ITEM_ID_REMOVE, /* .id_change */
- KDBUS_ITEM_REPLY_TIMEOUT, /* empty, but .reply_cookie in .kdbus_msg is filled in */
+ KDBUS_ITEM_REPLY_TIMEOUT, /* empty, reply_cookie is filled in */
KDBUS_ITEM_REPLY_DEAD, /* dito */
};
-/*
+/**
* struct kdbus_item - chain of data blocks
- * @size: : overall data record size
- * @type: kdbus_item type of data
+ * @size: Overall data record size
+ * @type: Kdbus_item type of data
+ * @data: Generic bytes
+ * @data32: Generic 32 bit array
+ * @data64: Generic 64 bit array
+ * @str: Generic string
+ * @id: Connection ID
+ * @vec: KDBUS_ITEM_PAYLOAD_VEC
+ * @creds: KDBUS_ITEM_CREDS
+ * @audit: KDBUS_ITEM_AUDIT
+ * @timestamp: KDBUS_ITEM_TIMESTAMP
+ * @name: KDBUS_ITEM_NAME
+ * @memfd: KDBUS_ITEM_PAYLOAD_MEMFD
+ * @name_change: KDBUS_ITEM_NAME_ADD
+ * KDBUS_ITEM_NAME_REMOVE
+ * KDBUS_ITEM_NAME_CHANGE
+ * @id_change: KDBUS_ITEM_ID_ADD
+ * KDBUS_ITEM_ID_REMOVE
+ * @policy: KDBUS_ITEM_POLICY_NAME
+ * KDBUS_ITEM_POLICY_ACCESS
*/
struct kdbus_item {
__u64 size;
__u64 type;
union {
- /* inline data */
__u8 data[0];
__u32 data32[0];
__u64 data64[0];
char str[0];
- /* connection */
__u64 id;
-
- /* data vector */
struct kdbus_vec vec;
-
- /* process credentials and properties*/
struct kdbus_creds creds;
struct kdbus_audit audit;
struct kdbus_timestamp timestamp;
struct kdbus_name name;
-
- /* specific fields */
struct kdbus_memfd memfd;
int fds[0];
struct kdbus_notify_name_change name_change;
@@ -251,12 +280,26 @@ struct kdbus_item {
};
};
-enum {
+/**
+ * enum kdbus_msg_flags - type of message
+ * @KDBUS_MSG_FLAGS_EXPECT_REPLY: Expect a reply message, used for method
+ * calls. The cookie identifies the
+ * message and the respective reply
+ * @KDBUS_MSG_FLAGS_NO_AUTO_START: Do not start a service, if the addressed
+ * name is not currently active
+ */
+enum kdbus_msg_flags {
KDBUS_MSG_FLAGS_EXPECT_REPLY = 1 << 0,
KDBUS_MSG_FLAGS_NO_AUTO_START = 1 << 1,
};
-enum {
+/**
+ * enum kdbus_payload_type - type of payload carried by message
+ * @KDBUS_PAYLOAD_KERNEL: Kernel-generated simple message
+ * @KDBUS_PAYLOAD_DBUS1: Legacy D-Bus version 1 marshalling
+ * @KDBUS_PAYLOAD_GVARIANT: GVariant marshalling
+ */
+enum kdbus_payload_type {
KDBUS_PAYLOAD_KERNEL,
KDBUS_PAYLOAD_DBUS1 = 0x4442757356657231ULL, /* 'DBusVer1' */
KDBUS_PAYLOAD_GVARIANT = 0x4756617269616e74ULL, /* 'GVariant' */
@@ -290,14 +333,26 @@ struct kdbus_msg {
struct kdbus_item items[0];
};
-enum {
+/**
+ * enum kdbus_policy_access_type - permissions of a policy record
+ * @KDBUS_POLICY_ACCESS_USER: Grant access to a uid
+ * @KDBUS_POLICY_ACCESS_GROUP: Grant acces to gid
+ * @KDBUS_POLICY_ACCESS_WORLD: World-accessible
+ */
+enum kdbus_policy_access_type {
_KDBUS_POLICY_ACCESS_NULL,
KDBUS_POLICY_ACCESS_USER,
KDBUS_POLICY_ACCESS_GROUP,
KDBUS_POLICY_ACCESS_WORLD,
};
-enum {
+/**
+ * enum kdbus_policy_access_flags - mode flags
+ * @KDBUS_POLICY_RECV: Allow receive
+ * @KDBUS_POLICY_SEND: Allow send
+ * @KDBUS_POLICY_OWN: Allow to own a well-known name
+ */
+enum kdbus_policy_type {
KDBUS_POLICY_RECV = 1 << 2,
KDBUS_POLICY_SEND = 1 << 1,
KDBUS_POLICY_OWN = 1 << 0,
@@ -317,14 +372,32 @@ struct kdbus_cmd_policy {
struct kdbus_item policies[0];
};
-/* Flags for struct kdbus_cmd_hello */
-enum {
+/**
+ * enum kdbus_hello_flags - flags for struct kdbus_cmd_hello
+ * @KDBUS_HELLO_STARTER: The connection registers a name for activation
+ * by well-know name
+ * @KDBUS_HELLO_ACCEPT_FD: The connection allows the receiving of
+ * any passed file descriptors
+ */
+enum kdbus_hello_flags {
KDBUS_HELLO_STARTER = 1 << 0,
KDBUS_HELLO_ACCEPT_FD = 1 << 1,
};
-/* Flags for message attachments */
-enum {
+/**
+ * enum kdbus_attach_flags - flags for metadata attachments
+ * @KDBUS_ATTACH_TIMESTAMP: Timestamp
+ * @KDBUS_ATTACH_CREDS: Credentials
+ * @KDBUS_ATTACH_NAMES: Well-known names
+ * @KDBUS_ATTACH_COMM: The "comm" process identifier
+ * @KDBUS_ATTACH_EXE: The path of the executable
+ * @KDBUS_ATTACH_CMDLINE: The process command line
+ * @KDBUS_ATTACH_CGROUP: The croup membership
+ * @KDBUS_ATTACH_CAPS: The process capabilities
+ * @KDBUS_ATTACH_SECLABEL: The security label
+ * @KDBUS_ATTACH_AUDIT: The audit IDs
+ */
+enum kdbus_attach_flags {
KDBUS_ATTACH_TIMESTAMP = 1 << 0,
KDBUS_ATTACH_CREDS = 1 << 1,
KDBUS_ATTACH_NAMES = 1 << 2,
@@ -376,18 +449,12 @@ struct kdbus_cmd_hello {
};
/* Flags for KDBUS_CMD_{BUS,EP,NS}_MAKE */
-enum {
+enum kdbus_make_flags {
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,
-};
-
/**
* struct kdbus_cmd_bus_make - struct to make a bus
* @size: The total size of the struct
@@ -437,7 +504,7 @@ struct kdbus_cmd_ns_make {
struct kdbus_item items[0];
};
-enum {
+enum kdbus_name_flags {
/* userspace → kernel */
KDBUS_NAME_REPLACE_EXISTING = 1 << 0,
KDBUS_NAME_QUEUE = 1 << 1,
@@ -467,7 +534,7 @@ struct kdbus_cmd_name {
char name[0];
};
-enum {
+enum kdbus_name_list_flags {
KDBUS_NAME_LIST_UNIQUE = 1 << 0,
KDBUS_NAME_LIST_NAMES = 1 << 1,
KDBUS_NAME_LIST_STARTERS = 1 << 2,
@@ -543,27 +610,37 @@ struct kdbus_conn_info {
struct kdbus_item items[0];
};
-enum {
+/**
+ * enum kdbus_match_type - type of match record
+ * @KDBUS_MATCH_BLOOM: Matches against KDBUS_MSG_BLOOM
+ * @KDBUS_MATCH_SRC_NAME: Matches a name string
+ * @KDBUS_MATCH_NAME_ADD: Matches a name string
+ * @KDBUS_MATCH_NAME_REMOVE: Matches a name string
+ * @KDBUS_MATCH_NAME_CHANGE: Matches a name string
+ * @KDBUS_MATCH_ID_ADD: Matches an ID
+ * @KDBUS_MATCH_ID_REMOVE: Matches an ID
+ */
+enum kdbus_match_type {
_KDBUS_MATCH_NULL,
- KDBUS_MATCH_BLOOM, /* Matches a mask blob against KDBUS_MSG_BLOOM */
- KDBUS_MATCH_SRC_NAME, /* Matches a name string against KDBUS_ITEM_NAME */
- KDBUS_MATCH_NAME_ADD, /* Matches a name string against KDBUS_ITEM_NAME_ADD */
- KDBUS_MATCH_NAME_REMOVE, /* Matches a name string against KDBUS_ITEM_NAME_REMOVE */
- KDBUS_MATCH_NAME_CHANGE, /* Matches a name string against KDBUS_ITEM_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 */
+ KDBUS_MATCH_BLOOM,
+ KDBUS_MATCH_SRC_NAME,
+ KDBUS_MATCH_NAME_ADD,
+ KDBUS_MATCH_NAME_REMOVE,
+ KDBUS_MATCH_NAME_CHANGE,
+ KDBUS_MATCH_ID_ADD,
+ KDBUS_MATCH_ID_REMOVE,
};
/**
* struct kdbus_cmd_match - struct to add or remove matches
* @size: The total size of the struct
- * @id: Priviledged users may (de)register matches on behalf
- * of other peers.
- * In other cases, set to 0.
- * @cookie: Userspace supplied cookie. When removing, the cookie is
- * suffices as information
- * @src_id: The source ID to match against. Use KDBUS_MATCH_SRC_ID_ANY or
- * any other value for a unique match.
+ * @id: Privileged users may (de)register matches on behalf
+ * of other peers. In other cases, set to 0.
+ * @cookie: Userspace supplied cookie. When removing, the cookie
+ * identifies the match to remove.
+ * @src_id: The source ID to match against. Use
+ * KDBUS_MATCH_SRC_ID_ANY or any other value for a unique
+ * match.
* @items: A list of items for additional information
*
* This structure is used with the KDBUS_CMD_ADD_MATCH and
@@ -578,7 +655,7 @@ struct kdbus_cmd_match {
struct kdbus_item items[0];
};
-enum {
+enum kdbus_monitor_flags {
KDBUS_MONITOR_ENABLE = 1 << 0,
};
@@ -596,38 +673,161 @@ struct kdbus_cmd_monitor {
__u64 flags;
};
-enum {
- /* kdbus control node commands: require unset state */
- 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),
+/**
+ * enum kdbus_ioctl_type - Ioctl API
+ * @KDBUS_CMD_BUS_MAKE: After opening the "control" device node, this
+ * command creates a new bus with the specified
+ * name. The bus is immediately shut down and
+ * cleaned up when the opened "control" device node
+ * is closed.
+ * @KDBUS_CMD_NS_MAKE: Similar to KDBUS_CMD_BUS_MAKE, but it creates a
+ * new kdbus namespace.
+ * @KDBUS_CMD_EP_MAKE: Creates a new named special endpoint to talk to
+ * the bus. Such endpoints usually carry a more
+ * restrictive policy and grant restricted access
+ * to specific applications.
+ * @KDBUS_CMD_HELLO: By opening the bus device node a connection is
+ * created. After a HELLO the opened connection
+ * becomes an active peer on the bus.
+ * @KDBUS_CMD_MSG_SEND: Send a message and pass data from userspace to
+ * the kernel.
+ * @KDBUS_CMD_MSG_RECV: Receive a message from the kernel which is
+ * placed in the receiver's pool.
+ * @KDBUS_CMD_FREE: Release the allocated memory in the receiver's
+ * pool.
+ * @KDBUS_CMD_NAME_ACQUIRE: Request a well-known bus name to associate with
+ * the connection. Well-known names are used to
+ * address a peer on the bus.
+ * @KDBUS_CMD_NAME_RELEASE: Release a well-known name the connection
+ * currently owns.
+ * @KDBUS_CMD_NAME_LIST: Retrieve the list of all currently registered
+ * well-known and unique names.
+ * @KDBUS_CMD_CONN_INFO: Retrieve credentials and properties of the
+ * initial creator of the connection. The data was
+ * stored at registration time and does not
+ * neccessarily represent the connected process or
+ * the actual state of the process.
+ * @KDBUS_CMD_MATCH_ADD: Install a match which broadcast messages should
+ * be delivered to the connection.
+ * @KDBUS_CMD_MATCH_REMOVE: Remove a current match for broadcast messages.
+ * @KDBUS_CMD_MONITOR: Monitor the bus and receive all transmitted
+ * messages. Privileges are required for this
+ * operation.
+ * @KDBUS_CMD_EP_POLICY_SET: Set the policy of an endpoint. It is used to
+ * restrict the access for endpoints created with
+ * KDBUS_CMD_EP_MAKE.
+ * @KDBUS_CMD_MEMFD_NEW: Return a new file descriptor which provides an
+ * anonymous shared memory file and which can be
+ * used to pass around larger chunks of data.
+ * Kdbus memfd files can be sealed, which allows
+ * the receiver to trust the data it has received.
+ * Kdbus memfd files expose only very limited
+ * operations, they can be mmap()ed, seek()ed,
+ * (p)read(v)() and (p)write(v)(); most other
+ * common file operations are not implemented.
+ * Special caution needs to be taken with
+ * read(v)()/write(v)() on a shared file; the
+ * underlying file position is always shared
+ * between all users of the file and race against
+ * each other, pread(v)()/pwrite(v)() avoid these
+ * issues.
+ * @KDBUS_CMD_MEMFD_SIZE_GET: Return the size of the underlying file, which
+ * changes with write().
+ * @KDBUS_CMD_MEMFD_SIZE_SET: Truncate the underlying file to the specified
+ * size.
+ * @KDBUS_CMD_MEMFD_SEAL_GET: Return the state of the file sealing.
+ * @KDBUS_CMD_MEMFD_SEAL_SET: Seal or break a seal of the file. Only files
+ * which are not shared with other processes and
+ * which are currently not mapped can be sealed.
+ * The current process needs to be the one and
+ * single owner of the file, the sealing cannot
+ * be changed as long as the file is shared.
+ */
+enum kdbus_ioctl_type {
+ 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 = _IOW(KDBUS_IOC_MAGIC, 0x20, struct kdbus_cmd_ep_make),
+ 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 = _IOW(KDBUS_IOC_MAGIC, 0x40, struct kdbus_msg),
- KDBUS_CMD_MSG_RECV = _IOR(KDBUS_IOC_MAGIC, 0x41, __u64 *),
- KDBUS_CMD_FREE = _IOW(KDBUS_IOC_MAGIC, 0x42, __u64 *),
+ KDBUS_CMD_MSG_SEND = _IOW (KDBUS_IOC_MAGIC, 0x40, struct kdbus_msg),
+ KDBUS_CMD_MSG_RECV = _IOR (KDBUS_IOC_MAGIC, 0x41, __u64 *),
+ KDBUS_CMD_FREE = _IOW (KDBUS_IOC_MAGIC, 0x42, __u64 *),
KDBUS_CMD_NAME_ACQUIRE = _IOWR(KDBUS_IOC_MAGIC, 0x50, struct kdbus_cmd_name),
- KDBUS_CMD_NAME_RELEASE = _IOW(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_name_list),
KDBUS_CMD_CONN_INFO = _IOWR(KDBUS_IOC_MAGIC, 0x60, struct kdbus_cmd_conn_info),
- KDBUS_CMD_MATCH_ADD = _IOW(KDBUS_IOC_MAGIC, 0x70, struct kdbus_cmd_match),
- KDBUS_CMD_MATCH_REMOVE = _IOW(KDBUS_IOC_MAGIC, 0x71, struct kdbus_cmd_match),
- KDBUS_CMD_MONITOR = _IOW(KDBUS_IOC_MAGIC, 0x72, struct kdbus_cmd_monitor),
+ KDBUS_CMD_MATCH_ADD = _IOW (KDBUS_IOC_MAGIC, 0x70, struct kdbus_cmd_match),
+ KDBUS_CMD_MATCH_REMOVE = _IOW (KDBUS_IOC_MAGIC, 0x71, struct kdbus_cmd_match),
+ KDBUS_CMD_MONITOR = _IOW (KDBUS_IOC_MAGIC, 0x72, struct kdbus_cmd_monitor),
- /* kdbus ep node commands: require ep owner state */
- KDBUS_CMD_EP_POLICY_SET = _IOW(KDBUS_IOC_MAGIC, 0x80, struct kdbus_cmd_policy),
+ KDBUS_CMD_EP_POLICY_SET = _IOW (KDBUS_IOC_MAGIC, 0x80, struct kdbus_cmd_policy),
- /* kdbus memfd commands: */
- KDBUS_CMD_MEMFD_NEW = _IOR(KDBUS_IOC_MAGIC, 0x90, int *),
- KDBUS_CMD_MEMFD_SIZE_GET = _IOR(KDBUS_IOC_MAGIC, 0x91, __u64 *),
- KDBUS_CMD_MEMFD_SIZE_SET = _IOW(KDBUS_IOC_MAGIC, 0x92, __u64 *),
- KDBUS_CMD_MEMFD_SEAL_GET = _IOR(KDBUS_IOC_MAGIC, 0x93, int *),
- KDBUS_CMD_MEMFD_SEAL_SET = _IO(KDBUS_IOC_MAGIC, 0x94),
+ KDBUS_CMD_MEMFD_NEW = _IOR (KDBUS_IOC_MAGIC, 0x90, int *),
+ KDBUS_CMD_MEMFD_SIZE_GET = _IOR (KDBUS_IOC_MAGIC, 0x91, __u64 *),
+ KDBUS_CMD_MEMFD_SIZE_SET = _IOW (KDBUS_IOC_MAGIC, 0x92, __u64 *),
+ KDBUS_CMD_MEMFD_SEAL_GET = _IOR (KDBUS_IOC_MAGIC, 0x93, int *),
+ KDBUS_CMD_MEMFD_SEAL_SET = _IO (KDBUS_IOC_MAGIC, 0x94),
};
+
+/*
+ * errno - api error codes
+ * @E2BIG: A message contains too many records or items.
+ * @EADDRNOTAVAIL: A message flagged not to activate a service, addressed
+ * a service which is not currently running.
+ * @EAGAIN: No messages are queued at the moment.
+ * @EBADF: File descriptors passed with the message are not valid.
+ * @EBADFD: A bus connection is in a corrupted state.
+ * @EBADMSG: Passed data contains a combination of conflicting or
+ * inconsistent types.
+ * @EBUSY: A well-known bus name is already taken by another
+ * connection.
+ * @ECOMM: A peer does not accept the file descriptors addressed
+ * to it.
+ * @EDESTADDRREQ: The well-known bus name is required but missing.
+ * @EDOM: The size of data does not match the expectations. Used
+ * for the size of the bloom filter bit field.
+ * @EEXIST: A requested namespace, bus or endpoint with the same
+ * name already exists. A specific data type, which is
+ * only expected once, is provided multiple times.
+ * @EFAULT: The supplied memory could not be accessed, or the data
+ * is not properly aligned.
+ * @EINVAL: The provided data does not match its type or other
+ * expectations, like a string which is not NUL terminated,
+ * or a string length that points behind the first
+ * \0-byte in the string.
+ * @EMEDIUMTYPE: A file descriptor which is not a kdbus memfd was
+ * refused to send as KDBUS_MSG_PAYLOAD_MEMFD.
+ * @EMFILE: Too many file descriptors have been supplied with a
+ * message.
+ * @EMSGSIZE: The supplied data is larger than the allowed maximum
+ * size.
+ * @ENAMETOOLONG: The requested name is larger than the allowed maximum
+ * size.
+ * @ENOBUFS: There is no space left for the submitted data to fit
+ * into the receiver's pool.
+ * @ENOMEM: Out of memory.
+ * @ENOSYS: The requested functionality is not available.
+ * @ENOTCONN: The addressed peer is not an active connection.
+ * @ENOTSUPP: The feature negotiation failed, a not supported feature
+ * was requested.
+ * @ENOTTY: An unknown ioctl command was received.
+ * @ENOTUNIQ: A specific data type was addressed to a broadcast
+ * address, but only direct addresses support this kind of
+ * data.
+ * @ENXIO: A unique address does not exist.
+ * @EPERM: The policy prevented an operation. The requested
+ * resource is owned by another entity.
+ * @ESHUTDOWN: The connection is currently shutting down, no further
+ * operations are possible.
+ * @ESRCH: A requested well-known bus name is not found.
+ * @ETXTBSY: A kdbus memfd file cannot be sealed or the seal removed,
+ * because it is shared with other processes or still
+ * mmap()ed.
+ * @EXFULL: The size limits in the pool are reached, no data of
+ * the size tried to submit can be queued.
+ */
#endif
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