[systemd-commits] 2 commits - src/libsystemd
Kay Sievers
kay at kemper.freedesktop.org
Tue Jan 14 04:24:52 PST 2014
src/libsystemd/bus-kernel.c | 7 -
src/libsystemd/kdbus.h | 280 ++++++++++++++++++++++++--------------------
src/libsystemd/sd-memfd.c | 12 +
3 files changed, 167 insertions(+), 132 deletions(-)
New commits:
commit 135a4eb43449bd64e4ec262573a6ffe29a5ffd03
Author: Kay Sievers <kay at vrfy.org>
Date: Tue Jan 14 20:15:25 2014 +0800
bus: update kdbus.h (ABI break)
diff --git a/src/libsystemd/bus-kernel.c b/src/libsystemd/bus-kernel.c
index e8f4c58..d69d6f3 100644
--- a/src/libsystemd/bus-kernel.c
+++ b/src/libsystemd/bus-kernel.c
@@ -1000,18 +1000,21 @@ int bus_kernel_pop_memfd(sd_bus *bus, void **address, size_t *mapped, size_t *al
assert_se(pthread_mutex_lock(&bus->memfd_cache_mutex) >= 0);
if (bus->n_memfd_cache <= 0) {
+ struct kdbus_cmd_memfd_make cmd = {
+ .size = sizeof(struct kdbus_cmd_memfd_make),
+ };
int r;
assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
- r = ioctl(bus->input_fd, KDBUS_CMD_MEMFD_NEW, &fd);
+ r = ioctl(bus->input_fd, KDBUS_CMD_MEMFD_NEW, &cmd);
if (r < 0)
return -errno;
*address = NULL;
*mapped = 0;
*allocated = 0;
- return fd;
+ return cmd.fd;
}
c = &bus->memfd_cache[--bus->n_memfd_cache];
diff --git a/src/libsystemd/kdbus.h b/src/libsystemd/kdbus.h
index 601d018..d2e4fd3 100644
--- a/src/libsystemd/kdbus.h
+++ b/src/libsystemd/kdbus.h
@@ -137,7 +137,7 @@ struct kdbus_vec {
* struct kdbus_memfd - a kdbus memfd
* @size: The memfd's size
* @fd: The file descriptor number
- * @__pad: Padding to make the struct aligned
+ * @__pad: Padding to ensure proper alignement and size
*
* Attached to:
* KDBUS_ITEM_PAYLOAD_MEMFD
@@ -205,6 +205,7 @@ struct kdbus_policy {
* @KDBUS_ITEM_BLOOM_SIZE: Desired bloom size, used by KDBUS_CMD_BUS_MAKE
* @KDBUS_ITEM_DST_NAME: Destination's well-known name
* @KDBUS_ITEM_MAKE_NAME: Name of namespace, bus, endpoint
+ * @KDBUS_ITEM_MEMFD_NAME: The human readable name of a memfd (debugging)
* @_KDBUS_ITEM_POLICY_BASE: Start of policy items
* @KDBUS_ITEM_POLICY_NAME: Policy in struct kdbus_policy
* @KDBUS_ITEM_POLICY_ACCESS: Policy in struct kdbus_policy
@@ -221,6 +222,7 @@ struct kdbus_policy {
* @KDBUS_ITEM_CAPS: The process capabilities
* @KDBUS_ITEM_SECLABEL: The security label
* @KDBUS_ITEM_AUDIT: The audit IDs
+ * @KDBUS_ITEM_CONN_NAME: The connection's human-readable name (debugging)
* @_KDBUS_ITEM_KERNEL_BASE: Start of kernel-generated message items
* @KDBUS_ITEM_NAME_ADD: Notify in struct kdbus_notify_name_change
* @KDBUS_ITEM_NAME_REMOVE: Notify in struct kdbus_notify_name_change
@@ -241,12 +243,13 @@ enum kdbus_item_type {
KDBUS_ITEM_BLOOM_SIZE,
KDBUS_ITEM_DST_NAME,
KDBUS_ITEM_MAKE_NAME,
+ KDBUS_ITEM_MEMFD_NAME,
- _KDBUS_ITEM_POLICY_BASE = 0x400,
+ _KDBUS_ITEM_POLICY_BASE = 0x1000,
KDBUS_ITEM_POLICY_NAME = _KDBUS_ITEM_POLICY_BASE,
KDBUS_ITEM_POLICY_ACCESS,
- _KDBUS_ITEM_ATTACH_BASE = 0x600,
+ _KDBUS_ITEM_ATTACH_BASE = 0x2000,
KDBUS_ITEM_NAME = _KDBUS_ITEM_ATTACH_BASE,
KDBUS_ITEM_ID,
KDBUS_ITEM_TIMESTAMP,
@@ -259,8 +262,9 @@ enum kdbus_item_type {
KDBUS_ITEM_CAPS,
KDBUS_ITEM_SECLABEL,
KDBUS_ITEM_AUDIT,
+ KDBUS_ITEM_CONN_NAME,
- _KDBUS_ITEM_KERNEL_BASE = 0x800,
+ _KDBUS_ITEM_KERNEL_BASE = 0x3000,
KDBUS_ITEM_NAME_ADD = _KDBUS_ITEM_KERNEL_BASE,
KDBUS_ITEM_NAME_REMOVE,
KDBUS_ITEM_NAME_CHANGE,
@@ -350,13 +354,13 @@ enum kdbus_payload_type {
* @payload_type: Payload type (KDBUS_PAYLOAD_*)
* @cookie: Userspace-supplied cookie, for the connection
* to identify its messages
- * @cookie_reply: A reply to the requesting message with the same
- * cookie. The requesting connection can match its
- * request and the reply with this value
* @timeout_ns: The time to wait for a message reply from the peer.
* If there is no reply, a kernel-generated message
* with an attached KDBUS_ITEM_REPLY_TIMEOUT item
* is sent to @src_id.
+ * @cookie_reply: A reply to the requesting message with the same
+ * cookie. The requesting connection can match its
+ * request and the reply with this value
* @items: A list of kdbus_items containing the message payload
*/
struct kdbus_msg {
@@ -367,8 +371,8 @@ struct kdbus_msg {
__u64 payload_type;
__u64 cookie;
union {
- __u64 cookie_reply;
__u64 timeout_ns;
+ __u64 cookie_reply;
};
struct kdbus_item items[0];
} __attribute__((aligned(8)));
@@ -441,6 +445,7 @@ enum kdbus_hello_flags {
* @KDBUS_ATTACH_CAPS: The process capabilities
* @KDBUS_ATTACH_SECLABEL: The security label
* @KDBUS_ATTACH_AUDIT: The audit IDs
+ * @KDBUS_ATTACH_CONN_NAME: The human-readable connection name
*/
enum kdbus_attach_flags {
KDBUS_ATTACH_TIMESTAMP = 1 << 0,
@@ -453,6 +458,7 @@ enum kdbus_attach_flags {
KDBUS_ATTACH_CAPS = 1 << 7,
KDBUS_ATTACH_SECLABEL = 1 << 8,
KDBUS_ATTACH_AUDIT = 1 << 9,
+ KDBUS_ATTACH_CONN_NAME = 1 << 10,
};
/**
@@ -650,6 +656,24 @@ struct kdbus_cmd_match {
} __attribute__((aligned(8)));
/**
+ * struct kdbus_cmd_memfd_make - create a kdbus memfd
+ * @size: The total size of the struct
+ * @file_size: The initial file size
+ * @fd: The returned file descriptor number
+ * @__pad: Padding to ensure proper alignement
+ * @items: A list of items for additional information
+ *
+ * This structure is used with the KDBUS_CMD_MEMFD_NEW ioctl.
+ */
+struct kdbus_cmd_memfd_make {
+ __u64 size;
+ __u64 file_size;
+ int fd;
+ __u32 __pad;
+ struct kdbus_item items[0];
+} __attribute__((aligned(8)));
+
+/**
* 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
@@ -678,8 +702,9 @@ struct kdbus_cmd_match {
* pool.
* @KDBUS_CMD_DROP: Drop and free the next queued message and all
* its ressources without actually receiveing it.
- * @KDBUS_CMD_SRC: Return the sender's connection ID of the next
- * queued message.
+ * @KDBUS_CMD_SRC: Query the sender's connection ID of the next
+ * queued message, used to determine the activating
+ * connection of a bus name.
* @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.
@@ -750,11 +775,11 @@ enum kdbus_ioctl_type {
KDBUS_CMD_EP_POLICY_SET = _IOW (KDBUS_IOC_MAGIC, 0x80, struct kdbus_cmd_policy),
- 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 = _IOWR(KDBUS_IOC_MAGIC, 0xc0, struct kdbus_cmd_memfd_make),
+ KDBUS_CMD_MEMFD_SIZE_GET = _IOR (KDBUS_IOC_MAGIC, 0xc1, __u64 *),
+ KDBUS_CMD_MEMFD_SIZE_SET = _IOW (KDBUS_IOC_MAGIC, 0xc2, __u64 *),
+ KDBUS_CMD_MEMFD_SEAL_GET = _IOR (KDBUS_IOC_MAGIC, 0xc3, int *),
+ KDBUS_CMD_MEMFD_SEAL_SET = _IO (KDBUS_IOC_MAGIC, 0xc4),
};
/*
diff --git a/src/libsystemd/sd-memfd.c b/src/libsystemd/sd-memfd.c
index cd95978..112c95f 100644
--- a/src/libsystemd/sd-memfd.c
+++ b/src/libsystemd/sd-memfd.c
@@ -35,9 +35,11 @@ struct sd_memfd {
};
_public_ int sd_memfd_new(sd_memfd **m) {
+ struct kdbus_cmd_memfd_make cmd = {
+ .size = sizeof(struct kdbus_cmd_memfd_make),
+ };
_cleanup_close_ int kdbus = -1;
sd_memfd *n;
- int fd;
assert_return(m, -EINVAL);
@@ -45,14 +47,16 @@ _public_ int sd_memfd_new(sd_memfd **m) {
if (kdbus < 0)
return -errno;
- if (ioctl(kdbus, KDBUS_CMD_MEMFD_NEW, &fd) < 0)
+ if (ioctl(kdbus, KDBUS_CMD_MEMFD_NEW, &cmd) < 0)
return -errno;
n = new0(struct sd_memfd, 1);
- if (!n)
+ if (!n) {
+ close_nointr_nofail(cmd.fd);
return -ENOMEM;
+ }
- n->fd = fd;
+ n->fd = cmd.fd;
*m = n;
return 0;
}
commit 9597086027a937edfd7a3f5e5999796d2b34c8ad
Author: Kay Sievers <kay at vrfy.org>
Date: Tue Jan 14 16:10:08 2014 +0800
bus: update kdbus.h (ABI break)
diff --git a/src/libsystemd/kdbus.h b/src/libsystemd/kdbus.h
index c59bdd8..601d018 100644
--- a/src/libsystemd/kdbus.h
+++ b/src/libsystemd/kdbus.h
@@ -102,6 +102,7 @@ struct kdbus_audit {
/**
* struct kdbus_timestamp
+ * @seqnum: Global per-namespace message sequence number
* @monotonic_ns: Monotonic timestamp, in nanoseconds
* @realtime_ns: Realtime timestamp, in nanoseconds
*
@@ -109,6 +110,7 @@ struct kdbus_audit {
* KDBUS_ITEM_TIMESTAMP
*/
struct kdbus_timestamp {
+ __u64 seqnum;
__u64 monotonic_ns;
__u64 realtime_ns;
};
@@ -118,7 +120,7 @@ struct kdbus_timestamp {
* @size: The size of the vector
* @address: Memory address for memory addresses
* @offset: Offset in the in-message payload memory,
- * relative to the message head
+ * relative to the message head
*
* Attached to:
* KDBUS_ITEM_PAYLOAD_VEC
@@ -164,7 +166,7 @@ struct kdbus_name {
* @type: One of KDBUS_POLICY_ACCESS_* types
* @bits: Access to grant. One of KDBUS_POLICY_*
* @id: For KDBUS_POLICY_ACCESS_USER, the uid
- * For KDBUS_POLICY_ACCESS_GROUP, the gid
+ * For KDBUS_POLICY_ACCESS_GROUP, the gid
*
* Embedded in:
* struct kdbus_policy
@@ -284,12 +286,12 @@ enum kdbus_item_type {
* @name: KDBUS_ITEM_NAME
* @memfd: KDBUS_ITEM_PAYLOAD_MEMFD
* @name_change: KDBUS_ITEM_NAME_ADD
- * KDBUS_ITEM_NAME_REMOVE
- * KDBUS_ITEM_NAME_CHANGE
+ * KDBUS_ITEM_NAME_REMOVE
+ * KDBUS_ITEM_NAME_CHANGE
* @id_change: KDBUS_ITEM_ID_ADD
- * KDBUS_ITEM_ID_REMOVE
+ * KDBUS_ITEM_ID_REMOVE
* @policy: KDBUS_ITEM_POLICY_NAME
- * KDBUS_ITEM_POLICY_ACCESS
+ * KDBUS_ITEM_POLICY_ACCESS
*/
struct kdbus_item {
__u64 size;
@@ -317,12 +319,12 @@ struct kdbus_item {
/**
* enum kdbus_msg_flags - type of message
* @KDBUS_MSG_FLAGS_EXPECT_REPLY: Expect a reply message, used for
- * method calls. The userspace-supplied
- * cookie identifies the message and the
- * respective reply carries the cookie
- * in cookie_reply
+ * method calls. The userspace-supplied
+ * cookie identifies the message and the
+ * respective reply carries the cookie
+ * in cookie_reply
* @KDBUS_MSG_FLAGS_NO_AUTO_START: Do not start a service, if the addressed
- * name is not currently active
+ * name is not currently active
*/
enum kdbus_msg_flags {
KDBUS_MSG_FLAGS_EXPECT_REPLY = 1 << 0,
@@ -347,14 +349,14 @@ enum kdbus_payload_type {
* @src_id: 64-bit ID of the source connection
* @payload_type: Payload type (KDBUS_PAYLOAD_*)
* @cookie: Userspace-supplied cookie, for the connection
- * to identify its messages
+ * to identify its messages
* @cookie_reply: A reply to the requesting message with the same
- * cookie. The requesting connection can match its
- * request and the reply with this value
+ * cookie. The requesting connection can match its
+ * request and the reply with this value
* @timeout_ns: The time to wait for a message reply from the peer.
- * If there is no reply, a kernel-generated message
- * with an attached KDBUS_ITEM_REPLY_TIMEOUT item
- * is sent to @src_id.
+ * If there is no reply, a kernel-generated message
+ * with an attached KDBUS_ITEM_REPLY_TIMEOUT item
+ * is sent to @src_id.
* @items: A list of kdbus_items containing the message payload
*/
struct kdbus_msg {
@@ -414,12 +416,12 @@ struct kdbus_cmd_policy {
/**
* enum kdbus_hello_flags - flags for struct kdbus_cmd_hello
* @KDBUS_HELLO_ACCEPT_FD: The connection allows the receiving of
- * any passed file descriptors
+ * any passed file descriptors
* @KDBUS_HELLO_ACTIVATOR: Special-purpose connection which registers
- * a well-know name for a process to be started
- * when traffic arrives
+ * a well-know name for a process to be started
+ * when traffic arrives
* @KDBUS_HELLO_MONITOR: Special-purpose connection to monitor
- * bus traffic
+ * bus traffic
*/
enum kdbus_hello_flags {
KDBUS_HELLO_ACCEPT_FD = 1 << 0,
@@ -457,18 +459,18 @@ enum kdbus_attach_flags {
* struct kdbus_cmd_hello - struct to say hello to kdbus
* @size: The total size of the structure
* @conn_flags: Connection flags (KDBUS_HELLO_*). The kernel will
- * return its capabilities in that field.
+ * return its capabilities in that field.
* @attach_flags: Mask of metadata to attach to each message sent
- * (KDBUS_ATTACH_*)
+ * (KDBUS_ATTACH_*)
* @bus_flags: The flags field copied verbatim from the original
- * KDBUS_CMD_BUS_MAKE ioctl. It's intended to be useful
+ * KDBUS_CMD_BUS_MAKE ioctl. It's intended to be useful
* to do negotiation of features of the payload that is
* transferred (kernel → userspace)
* @id: The ID of this connection (kernel → userspace)
* @bloom_size: The bloom filter size chosen by the owner
- * (kernel → userspace)
+ * (kernel → userspace)
* @pool_size: Size of the connection's buffer where the received
- * messages are placed
+ * messages are placed
* @id128: Unique 128-bit ID of the bus (kernel → userspace)
* @items: A list of items
*
@@ -530,8 +532,8 @@ enum kdbus_name_flags {
* @size: The total size of the struct
* @flags: Flags for a name entry (KDBUS_NAME_*)
* @owner_id: The current owner of the name. For requests,
- * privileged users may set this field to
- * (de)register names on behalf of other connections.
+ * privileged users may set this field to
+ * (de)register names on behalf of other connections.
* @conn_flags: The flags of the owning connection (KDBUS_HELLO_*)
* @name: The well-known name
*
@@ -591,13 +593,13 @@ struct kdbus_name_list {
* @size: The total size of the struct
* @flags: KDBUS_ATTACH_* flags
* @id: The 64-bit ID of the connection. If set to zero, passing
- * @name is required. kdbus will look up the name to determine
- * the ID in this case.
+ * @name is required. kdbus will look up the name to
+ * determine the ID in this case.
* @offset: Returned offset in the caller's pool buffer where the
- * kdbus_conn_info struct result is stored. The user must
- * use KDBUS_CMD_FREE to free the allocated memory.
+ * kdbus_conn_info struct result is stored. The user must
+ * use KDBUS_CMD_FREE to free the allocated memory.
* @name: The optional well-known name to look up. Only needed in
- * case @id is zero.
+ * case @id is zero.
*
* On success, the KDBUS_CMD_CONN_INFO ioctl will return 0 and @offset will
* tell the user the offset in the connection pool buffer at which to find the
@@ -632,9 +634,9 @@ struct kdbus_conn_info {
* struct kdbus_cmd_match - struct to add or remove matches
* @size: The total size of the struct
* @owner_id: Privileged users may (de)register matches on behalf
- * of other peers
+ * of other peers
* @cookie: Userspace supplied cookie. When removing, the cookie
- * identifies the match to remove
+ * identifies the match to remove
* @items: A list of items for additional information
*
* This structure is used with the KDBUS_CMD_ADD_MATCH and
@@ -650,78 +652,78 @@ struct kdbus_cmd_match {
/**
* 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.
+ * 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.
+ * 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.
+ * 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.
+ * created. After a HELLO the opened connection
+ * becomes an active peer on the bus.
* @KDBUS_CMD_BYEBYE: Disconnect a connection. If the connection's
- * message list is empty, the calls succeeds, and
- * the handle is rendered unusable. Otherwise,
- * -EAGAIN is returned without any further side-
- * effects.
+ * message list is empty, the calls succeeds, and
+ * the handle is rendered unusable. Otherwise,
+ * -EAGAIN is returned without any further side-
+ * effects.
* @KDBUS_CMD_MSG_SEND: Send a message and pass data from userspace to
- * the kernel.
+ * the kernel.
* @KDBUS_CMD_MSG_RECV: Receive a message from the kernel which is
- * placed in the receiver's pool.
+ * placed in the receiver's pool.
* @KDBUS_CMD_FREE: Release the allocated memory in the receiver's
- * pool.
+ * pool.
* @KDBUS_CMD_DROP: Drop and free the next queued message and all
- * its ressources without actually receiveing it.
+ * its ressources without actually receiveing it.
* @KDBUS_CMD_SRC: Return the sender's connection ID of the next
- * queued message.
+ * queued message.
* @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.
+ * 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.
+ * currently owns.
* @KDBUS_CMD_NAME_LIST: Retrieve the list of all currently registered
- * well-known and unique names.
+ * 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
- * necessarily represent the connected process or
- * the actual state of the process.
+ * initial creator of the connection. The data was
+ * stored at registration time and does not
+ * necessarily 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.
+ * be delivered to the connection.
* @KDBUS_CMD_MATCH_REMOVE: Remove a current match for broadcast messages.
* @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.
+ * 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.
+ * 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().
+ * changes with write().
* @KDBUS_CMD_MEMFD_SIZE_SET: Truncate the underlying file to the specified
- * size.
+ * 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.
+ * 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_make),
@@ -759,64 +761,65 @@ enum kdbus_ioctl_type {
* errno - api error codes
* @E2BIG: A message contains too many records or items.
* @EADDRINUSE: A well-known bus name is already taken by another
- * connection.
+ * connection.
* @EADDRNOTAVAIL: A message flagged not to activate a service, addressed
- * a service which is not currently running.
+ * 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.
+ * inconsistent types.
* @EBUSY: The user tried to say BYEBYE to a connection, but the
- * connection had a non-empty message list.
+ * connection had a non-empty message list.
* @ECONNRESET: A connection is shut down, no further operations are
- * possible.
+ * possible.
* @ECOMM: A peer does not accept the file descriptors addressed
- * to it.
+ * 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.
+ * 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.
+ * 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.
+ * 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.
+ * 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.
+ * refused to send as KDBUS_MSG_PAYLOAD_MEMFD.
* @EMFILE: Too many file descriptors have been supplied with a
- * message.
+ * message.
+ * @EMLINK: Too many requests from this connection to other peers
+ * are queued and waiting for a reply
* @EMSGSIZE: The supplied data is larger than the allowed maximum
- * size.
+ * size.
* @ENAMETOOLONG: The requested name is larger than the allowed maximum
- * size.
+ * size.
* @ENOBUFS: There is no space left for the submitted data to fit
- * into the receiver's pool.
+ * into the receiver's pool.
* @ENOENT: The name to query information about is currently not on
* the bus.
* @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, or an unknown item type was received.
+ * was requested, or an unknown item type was received.
* @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.
+ * address, but only direct addresses support this kind of
+ * data.
* @ENXIO: A unique address does not exist, or an offset in the
- * receiver's pool does not represent a queued message.
+ * receiver's pool does not represent a queued message.
* @EPERM: The policy prevented an operation. The requested
- * resource is owned by another entity.
+ * resource is owned by another entity.
* @ESHUTDOWN: A namespace or endpoint is currently shutting down;
- * no further operations will be possible.
+ * no further operations will be 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.
+ * 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.
+ * the size tried to submit can be queued.
*/
#endif
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