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-rw-r--r--src/libsystemd/sd-bus/bus-control.c2
-rw-r--r--src/libsystemd/sd-bus/bus-kernel.c64
-rw-r--r--src/libsystemd/sd-bus/kdbus.h95
3 files changed, 115 insertions, 46 deletions
diff --git a/src/libsystemd/sd-bus/bus-control.c b/src/libsystemd/sd-bus/bus-control.c
index 61cdf2249e..35fd384cdf 100644
--- a/src/libsystemd/sd-bus/bus-control.c
+++ b/src/libsystemd/sd-bus/bus-control.c
@@ -1070,7 +1070,7 @@ int bus_add_match_internal_kernel(
if (using_bloom) {
item->size = offsetof(struct kdbus_item, data64) + BLOOM_SIZE;
- item->type = KDBUS_ITEM_BLOOM;
+ item->type = KDBUS_ITEM_BLOOM_MASK;
memcpy(item->data64, bloom, BLOOM_SIZE);
item = KDBUS_ITEM_NEXT(item);
}
diff --git a/src/libsystemd/sd-bus/bus-kernel.c b/src/libsystemd/sd-bus/bus-kernel.c
index 27c2e0efcf..a33e7a323c 100644
--- a/src/libsystemd/sd-bus/bus-kernel.c
+++ b/src/libsystemd/sd-bus/bus-kernel.c
@@ -101,20 +101,21 @@ static void append_destination(struct kdbus_item **d, const char *s, size_t leng
*d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
}
-static void* append_bloom(struct kdbus_item **d, size_t length) {
- void *r;
+static struct kdbus_bloom_filter *append_bloom(struct kdbus_item **d, size_t length) {
+ struct kdbus_item *i;
assert(d);
- *d = ALIGN8_PTR(*d);
+ i = ALIGN8_PTR(*d);
- (*d)->size = offsetof(struct kdbus_item, data) + length;
- (*d)->type = KDBUS_ITEM_BLOOM;
- r = (*d)->data;
+ i->size = offsetof(struct kdbus_item, bloom_filter) +
+ offsetof(struct kdbus_bloom_filter, data) +
+ length;
+ i->type = KDBUS_ITEM_BLOOM_FILTER;
- *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
+ *d = (struct kdbus_item *) ((uint8_t*) i + i->size);
- return r;
+ return &i->bloom_filter;
}
static void append_fds(struct kdbus_item **d, const int fds[], unsigned n_fds) {
@@ -130,25 +131,28 @@ static void append_fds(struct kdbus_item **d, const int fds[], unsigned n_fds) {
*d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
}
-static int bus_message_setup_bloom(sd_bus_message *m, void *bloom) {
+static int bus_message_setup_bloom(sd_bus_message *m, struct kdbus_bloom_filter *bloom) {
+ void *data;
unsigned i;
int r;
assert(m);
assert(bloom);
- memset(bloom, 0, BLOOM_SIZE);
+ data = bloom->data;
+ memset(data, 0, BLOOM_SIZE);
+ bloom->generation = 0;
- bloom_add_pair(bloom, "message-type", bus_message_type_to_string(m->header->type));
+ bloom_add_pair(data, "message-type", bus_message_type_to_string(m->header->type));
if (m->interface)
- bloom_add_pair(bloom, "interface", m->interface);
+ bloom_add_pair(data, "interface", m->interface);
if (m->member)
- bloom_add_pair(bloom, "member", m->member);
+ bloom_add_pair(data, "member", m->member);
if (m->path) {
- bloom_add_pair(bloom, "path", m->path);
- bloom_add_pair(bloom, "path-slash-prefix", m->path);
- bloom_add_prefixes(bloom, "path-slash-prefix", m->path, '/');
+ bloom_add_pair(data, "path", m->path);
+ bloom_add_pair(data, "path-slash-prefix", m->path);
+ bloom_add_prefixes(data, "path-slash-prefix", m->path, '/');
}
r = sd_bus_message_rewind(m, true);
@@ -183,12 +187,12 @@ static int bus_message_setup_bloom(sd_bus_message *m, void *bloom) {
}
*e = 0;
- bloom_add_pair(bloom, buf, t);
+ bloom_add_pair(data, buf, t);
strcpy(e, "-dot-prefix");
- bloom_add_prefixes(bloom, buf, t, '.');
+ bloom_add_prefixes(data, buf, t, '.');
strcpy(e, "-slash-prefix");
- bloom_add_prefixes(bloom, buf, t, '/');
+ bloom_add_prefixes(data, buf, t, '/');
}
return 0;
@@ -231,7 +235,9 @@ static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) {
ALIGN8(offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec));
/* Add space for bloom filter */
- sz += ALIGN8(offsetof(struct kdbus_item, data) + BLOOM_SIZE);
+ sz += ALIGN8(offsetof(struct kdbus_item, bloom_filter) +
+ offsetof(struct kdbus_bloom_filter, data) +
+ BLOOM_SIZE);
/* Add in well-known destination header */
if (well_known) {
@@ -303,10 +309,10 @@ static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) {
}
if (m->kdbus->dst_id == KDBUS_DST_ID_BROADCAST) {
- void *p;
+ struct kdbus_bloom_filter *bloom;
- p = append_bloom(&d, BLOOM_SIZE);
- r = bus_message_setup_bloom(m, p);
+ bloom = append_bloom(&d, BLOOM_SIZE);
+ r = bus_message_setup_bloom(m, bloom);
if (r < 0)
goto fail;
}
@@ -748,7 +754,7 @@ int bus_kernel_take_fd(sd_bus *b) {
hello->conn_flags > 0xFFFFFFFFULL)
return -ENOTSUP;
- if (hello->bloom_size != BLOOM_SIZE)
+ if (hello->bloom.size != BLOOM_SIZE)
return -ENOTSUP;
if (asprintf(&b->unique_name, ":1.%llu", (unsigned long long) hello->id) < 0)
@@ -1282,9 +1288,11 @@ int bus_kernel_create_bus(const char *name, bool world, char **s) {
make->size = offsetof(struct kdbus_cmd_make, items);
n = make->items;
- n->size = offsetof(struct kdbus_item, data64) + sizeof(uint64_t);
- n->type = KDBUS_ITEM_BLOOM_SIZE;
- n->data64[0] = BLOOM_SIZE;
+ n->size = offsetof(struct kdbus_item, bloom_parameter) +
+ sizeof(struct kdbus_bloom_parameter);
+ n->type = KDBUS_ITEM_BLOOM_PARAMETER;
+ n->bloom_parameter.size = BLOOM_SIZE;
+ n->bloom_parameter.n_hash = 1;
assert_cc(BLOOM_SIZE % 8 == 0);
make->size += ALIGN8(n->size);
@@ -1365,7 +1373,7 @@ int bus_kernel_create_starter(const char *bus, const char *name) {
return -ENOTSUP;
}
- if (hello->bloom_size != BLOOM_SIZE) {
+ if (hello->bloom.size != BLOOM_SIZE) {
close_nointr_nofail(fd);
return -ENOTSUP;
}
diff --git a/src/libsystemd/sd-bus/kdbus.h b/src/libsystemd/sd-bus/kdbus.h
index fe0bb48728..4e4d343425 100644
--- a/src/libsystemd/sd-bus/kdbus.h
+++ b/src/libsystemd/sd-bus/kdbus.h
@@ -137,6 +137,26 @@ struct kdbus_vec {
};
/**
+ * struct kdbus_bloom_parameter - bus-wide bloom parameters
+ * @size: Size of the bit field in bytes (m / 8)
+ * @n_hash: Number of hash functions used (k)
+ */
+struct kdbus_bloom_parameter {
+ __u64 size;
+ __u64 n_hash;
+};
+
+/**
+ * struct kdbus_bloom_filter - bloom filter containing n elements
+ * @generation: Generation of the element set in the filter
+ * @data: Bit field, multiple of 8 bytes
+ */
+struct kdbus_bloom_filter {
+ __u64 generation;
+ __u64 data[0];
+};
+
+/**
* struct kdbus_memfd - a kdbus memfd
* @size: The memfd's size
* @fd: The file descriptor number
@@ -204,14 +224,19 @@ struct kdbus_policy {
* @KDBUS_ITEM_PAYLOAD_OFF: Data at returned offset to message head
* @KDBUS_ITEM_PAYLOAD_MEMFD: Data as sealed memfd
* @KDBUS_ITEM_FDS: Attached file descriptors
- * @KDBUS_ITEM_BLOOM: For broadcasts, carries bloom filter
- * @KDBUS_ITEM_BLOOM_SIZE: Desired bloom size, used by KDBUS_CMD_BUS_MAKE
+ * @KDBUS_ITEM_BLOOM_PARAMETER: Bus-wide bloom parameters, used with
+ * KDBUS_CMD_BUS_MAKE, carries a
+ * struct kdbus_bloom_parameter
+ * @KDBUS_ITEM_BLOOM_FILTER: Bloom filter carried with a message, used to
+ * match against a bloom mask of a connection,
+ * carries a struct kdbus_bloom_filter
+ * @KDBUS_ITEM_BLOOM_MASK: Bloom mask used to match against a message's
+ * bloom filter
* @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
+ * @KDBUS_ITEM_ATTACH_FLAGS: Attach-flags, used for updating which metadata
+ * a connection subscribes to
* @_KDBUS_ITEM_ATTACH_BASE: Start of metadata attach items
* @KDBUS_ITEM_NAME: Well-know name with flags
* @KDBUS_ITEM_ID: Connection ID
@@ -226,6 +251,9 @@ struct kdbus_policy {
* @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_POLICY_BASE: Start of policy items
+ * @KDBUS_ITEM_POLICY_NAME: Policy in struct kdbus_policy
+ * @KDBUS_ITEM_POLICY_ACCESS: Policy in struct kdbus_policy
* @_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
@@ -242,17 +270,15 @@ enum kdbus_item_type {
KDBUS_ITEM_PAYLOAD_OFF,
KDBUS_ITEM_PAYLOAD_MEMFD,
KDBUS_ITEM_FDS,
- KDBUS_ITEM_BLOOM,
- KDBUS_ITEM_BLOOM_SIZE,
+ KDBUS_ITEM_BLOOM_PARAMETER,
+ KDBUS_ITEM_BLOOM_FILTER,
+ KDBUS_ITEM_BLOOM_MASK,
KDBUS_ITEM_DST_NAME,
KDBUS_ITEM_MAKE_NAME,
KDBUS_ITEM_MEMFD_NAME,
+ KDBUS_ITEM_ATTACH_FLAGS,
- _KDBUS_ITEM_POLICY_BASE = 0x1000,
- KDBUS_ITEM_POLICY_NAME = _KDBUS_ITEM_POLICY_BASE,
- KDBUS_ITEM_POLICY_ACCESS,
-
- _KDBUS_ITEM_ATTACH_BASE = 0x2000,
+ _KDBUS_ITEM_ATTACH_BASE = 0x1000,
KDBUS_ITEM_NAME = _KDBUS_ITEM_ATTACH_BASE,
KDBUS_ITEM_ID,
KDBUS_ITEM_TIMESTAMP,
@@ -267,7 +293,11 @@ enum kdbus_item_type {
KDBUS_ITEM_AUDIT,
KDBUS_ITEM_CONN_NAME,
- _KDBUS_ITEM_KERNEL_BASE = 0x3000,
+ _KDBUS_ITEM_POLICY_BASE = 0x2000,
+ KDBUS_ITEM_POLICY_NAME = _KDBUS_ITEM_POLICY_BASE,
+ KDBUS_ITEM_POLICY_ACCESS,
+
+ _KDBUS_ITEM_KERNEL_BASE = 0x8000,
KDBUS_ITEM_NAME_ADD = _KDBUS_ITEM_KERNEL_BASE,
KDBUS_ITEM_NAME_REMOVE,
KDBUS_ITEM_NAME_CHANGE,
@@ -291,6 +321,8 @@ enum kdbus_item_type {
* @audit: KDBUS_ITEM_AUDIT
* @timestamp: KDBUS_ITEM_TIMESTAMP
* @name: KDBUS_ITEM_NAME
+ * @bloom_parameter: KDBUS_ITEM_BLOOM_PARAMETER
+ * @bloom_filter: KDBUS_ITEM_BLOOM_FILTER
* @memfd: KDBUS_ITEM_PAYLOAD_MEMFD
* @name_change: KDBUS_ITEM_NAME_ADD
* KDBUS_ITEM_NAME_REMOVE
@@ -315,6 +347,8 @@ struct kdbus_item {
struct kdbus_audit audit;
struct kdbus_timestamp timestamp;
struct kdbus_name name;
+ struct kdbus_bloom_parameter bloom_parameter;
+ struct kdbus_bloom_filter bloom_filter;
struct kdbus_memfd memfd;
int fds[0];
struct kdbus_notify_name_change name_change;
@@ -529,10 +563,10 @@ enum kdbus_attach_flags {
* 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)
* @pool_size: Size of the connection's buffer where the received
* messages are placed
+ * @bloom: The bloom properties of the bus, specified
+ * by the bus creator (kernel → userspace)
* @id128: Unique 128-bit ID of the bus (kernel → userspace)
* @items: A list of items
*
@@ -544,8 +578,8 @@ struct kdbus_cmd_hello {
__u64 attach_flags;
__u64 bus_flags;
__u64 id;
- __u64 bloom_size;
__u64 pool_size;
+ struct kdbus_bloom_parameter bloom;
__u8 id128[16];
struct kdbus_item items[0];
} __attribute__((aligned(8)));
@@ -692,6 +726,18 @@ struct kdbus_conn_info {
};
/**
+ * struct kdbus_cmd_conn_update - update flags of a connection
+ * @size: The total size of the struct
+ * @items: A list of struct kdbus_item
+ *
+ * This struct is used with the KDBUS_CMD_CONN_UPDATE ioctl.
+ */
+struct kdbus_cmd_conn_update {
+ __u64 size;
+ struct kdbus_item items[0];
+} __attribute__((aligned(8)));
+
+/**
* 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
@@ -753,6 +799,9 @@ struct kdbus_cmd_memfd_make {
* the kernel.
* @KDBUS_CMD_MSG_RECV: Receive a message from the kernel which is
* placed in the receiver's pool.
+ * @KDBUS_CMD_MSG_CANCEL: Cancel a pending request of a message that
+ * blocks while waiting for a reply. The parameter
+ * denotes the cookie of the message in flight.
* @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
@@ -767,6 +816,8 @@ struct kdbus_cmd_memfd_make {
* stored at registration time and does not
* necessarily represent the connected process or
* the actual state of the process.
+ * @KDBUS_CMD_CONN_UPDATE: Update the properties of a connection. Used to
+ * update the metadata subscription.
* @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.
@@ -810,6 +861,7 @@ enum kdbus_ioctl_type {
KDBUS_CMD_MSG_SEND = _IOW (KDBUS_IOC_MAGIC, 0x40, struct kdbus_msg),
KDBUS_CMD_MSG_RECV = _IOWR(KDBUS_IOC_MAGIC, 0x41, struct kdbus_cmd_recv),
+ KDBUS_CMD_MSG_CANCEL = _IOW (KDBUS_IOC_MAGIC, 0x43, __u64 *),
KDBUS_CMD_FREE = _IOW (KDBUS_IOC_MAGIC, 0x42, __u64 *),
KDBUS_CMD_NAME_ACQUIRE = _IOWR(KDBUS_IOC_MAGIC, 0x50, struct kdbus_cmd_name),
@@ -817,6 +869,7 @@ enum kdbus_ioctl_type {
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_CONN_UPDATE = _IOW (KDBUS_IOC_MAGIC, 0x61, struct kdbus_cmd_conn_update),
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),
@@ -844,13 +897,14 @@ enum kdbus_ioctl_type {
* inconsistent types.
* @EBUSY: The user tried to say BYEBYE to a connection, but the
* connection had a non-empty message list.
+ * @ECANCELED: A syncronous message sending was cancelled.
* @ECONNRESET: A connection is shut down, no further operations are
* possible.
* @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.
+ * for bloom bit field sizes.
* @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.
@@ -864,6 +918,8 @@ enum kdbus_ioctl_type {
* refused to send as KDBUS_MSG_PAYLOAD_MEMFD.
* @EMFILE: Too many file descriptors have been supplied with a
* message.
+ * Too many connections or buses are created for a given
+ * user.
* @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
@@ -888,9 +944,14 @@ enum kdbus_ioctl_type {
* receiver's pool does not represent a queued message.
* @EPERM: The policy prevented an operation. The requested
* resource is owned by another entity.
+ * @EPIPE: When sending a message, a synchronous reply from the
+ * receiving connection was expected but the connection
+ * died before answering.
* @ESHUTDOWN: A namespace or endpoint is currently shutting down;
* no further operations will be possible.
* @ESRCH: A requested well-known bus name is not found.
+ * @ETIMEDOUT: A synchronous wait for a message reply did not arrive
+ * within the specified time frame.
* @ETXTBSY: A kdbus memfd file cannot be sealed or the seal removed,
* because it is shared with other processes or still
* mmap()ed.
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-14 18:12:30 +0000