diff options
| -rw-r--r-- | src/libsystemd-bus/bus-kernel.c | 4 | ||||
| -rw-r--r-- | src/libsystemd-bus/kdbus.h | 414 |
2 files changed, 309 insertions, 109 deletions
diff --git a/src/libsystemd-bus/bus-kernel.c b/src/libsystemd-bus/bus-kernel.c index f234891889..495d7e57dc 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 6775789fe8..d89f8c088a 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 |