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-rw-r--r--src/libsystemd-bus/bus-kernel.c57
-rw-r--r--src/libsystemd-bus/kdbus.h65
2 files changed, 47 insertions, 75 deletions
diff --git a/src/libsystemd-bus/bus-kernel.c b/src/libsystemd-bus/bus-kernel.c
index c35d95727c..0762b7836f 100644
--- a/src/libsystemd-bus/bus-kernel.c
+++ b/src/libsystemd-bus/bus-kernel.c
@@ -41,6 +41,9 @@
(uint8_t *)(item) < (uint8_t *)(head) + (head)->size; \
item = KDBUS_ITEM_NEXT(item))
+#define KDBUS_ITEM_HEADER_SIZE offsetof(struct kdbus_item, data)
+#define KDBUS_ITEM_SIZE(s) ALIGN8((s) + KDBUS_ITEM_HEADER_SIZE)
+
static int parse_unique_name(const char *s, uint64_t *id) {
int r;
@@ -57,61 +60,61 @@ static int parse_unique_name(const char *s, uint64_t *id) {
return 1;
}
-static void append_payload_vec(struct kdbus_msg_item **d, const void *p, size_t sz) {
+static void append_payload_vec(struct kdbus_item **d, const void *p, size_t sz) {
assert(d);
assert(p);
assert(sz > 0);
*d = ALIGN8_PTR(*d);
- (*d)->size = offsetof(struct kdbus_msg_item, vec) + sizeof(struct kdbus_vec);
+ (*d)->size = offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec);
(*d)->type = KDBUS_MSG_PAYLOAD_VEC;
(*d)->vec.address = (intptr_t) p;
(*d)->vec.size = sz;
- *d = (struct kdbus_msg_item *) ((uint8_t*) *d + (*d)->size);
+ *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
}
-static void append_destination(struct kdbus_msg_item **d, const char *s, size_t length) {
+static void append_destination(struct kdbus_item **d, const char *s, size_t length) {
assert(d);
assert(s);
*d = ALIGN8_PTR(*d);
- (*d)->size = offsetof(struct kdbus_msg_item, str) + length + 1;
+ (*d)->size = offsetof(struct kdbus_item, str) + length + 1;
(*d)->type = KDBUS_MSG_DST_NAME;
memcpy((*d)->str, s, length + 1);
- *d = (struct kdbus_msg_item *) ((uint8_t*) *d + (*d)->size);
+ *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
}
-static void* append_bloom(struct kdbus_msg_item **d, size_t length) {
+static void* append_bloom(struct kdbus_item **d, size_t length) {
void *r;
assert(d);
*d = ALIGN8_PTR(*d);
- (*d)->size = offsetof(struct kdbus_msg_item, data) + length;
+ (*d)->size = offsetof(struct kdbus_item, data) + length;
(*d)->type = KDBUS_MSG_BLOOM;
r = (*d)->data;
- *d = (struct kdbus_msg_item *) ((uint8_t*) *d + (*d)->size);
+ *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
return r;
}
-static void append_fds(struct kdbus_msg_item **d, const int fds[], unsigned n_fds) {
+static void append_fds(struct kdbus_item **d, const int fds[], unsigned n_fds) {
assert(d);
assert(fds);
assert(n_fds > 0);
*d = ALIGN8_PTR(*d);
- (*d)->size = offsetof(struct kdbus_msg_item, fds) + sizeof(int) * n_fds;
+ (*d)->size = offsetof(struct kdbus_item, fds) + sizeof(int) * n_fds;
(*d)->type = KDBUS_MSG_UNIX_FDS;
memcpy((*d)->fds, fds, sizeof(int) * n_fds);
- *d = (struct kdbus_msg_item *) ((uint8_t*) *d + (*d)->size);
+ *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
}
static int bus_message_setup_bloom(sd_bus_message *m, void *bloom) {
@@ -178,7 +181,7 @@ static int bus_message_setup_bloom(sd_bus_message *m, void *bloom) {
}
static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) {
- struct kdbus_msg_item *d;
+ struct kdbus_item *d;
bool well_known;
uint64_t unique;
size_t sz, dl;
@@ -203,20 +206,20 @@ static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) {
sz = offsetof(struct kdbus_msg, items);
/* Add in fixed header, fields header and payload */
- sz += 3 * ALIGN8(offsetof(struct kdbus_msg_item, vec) + sizeof(struct kdbus_vec));
+ sz += 3 * ALIGN8(offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec));
/* Add space for bloom filter */
- sz += ALIGN8(offsetof(struct kdbus_msg_item, data) + BLOOM_SIZE);
+ sz += ALIGN8(offsetof(struct kdbus_item, data) + BLOOM_SIZE);
/* Add in well-known destination header */
if (well_known) {
dl = strlen(m->destination);
- sz += ALIGN8(offsetof(struct kdbus_msg_item, str) + dl + 1);
+ sz += ALIGN8(offsetof(struct kdbus_item, str) + dl + 1);
}
/* Add space for unix fds */
if (m->n_fds > 0)
- sz += ALIGN8(offsetof(struct kdbus_msg_item, fds) + sizeof(int)*m->n_fds);
+ sz += ALIGN8(offsetof(struct kdbus_item, fds) + sizeof(int)*m->n_fds);
m->kdbus = memalign(8, sz);
if (!m->kdbus)
@@ -354,20 +357,20 @@ int bus_kernel_write_message(sd_bus *bus, sd_bus_message *m) {
}
static void close_kdbus_msg(struct kdbus_msg *k) {
- struct kdbus_msg_item *d;
+ struct kdbus_item *d;
KDBUS_ITEM_FOREACH(d, k) {
if (d->type != KDBUS_MSG_UNIX_FDS)
continue;
- close_many(d->fds, (d->size - offsetof(struct kdbus_msg_item, fds)) / sizeof(int));
+ close_many(d->fds, (d->size - offsetof(struct kdbus_item, fds)) / sizeof(int));
}
}
static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k, sd_bus_message **ret) {
sd_bus_message *m = NULL;
- struct kdbus_msg_item *d;
+ struct kdbus_item *d;
unsigned n_payload = 0, n_fds = 0;
_cleanup_free_ int *fds = NULL;
struct bus_header *h = NULL;
@@ -385,7 +388,7 @@ static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k, sd_bus_mess
KDBUS_ITEM_FOREACH(d, k) {
size_t l;
- l = d->size - offsetof(struct kdbus_msg_item, data);
+ l = d->size - offsetof(struct kdbus_item, data);
if (d->type == KDBUS_MSG_PAYLOAD) {
@@ -435,7 +438,7 @@ static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k, sd_bus_mess
KDBUS_ITEM_FOREACH(d, k) {
size_t l;
- l = d->size - offsetof(struct kdbus_msg_item, data);
+ l = d->size - offsetof(struct kdbus_item, data);
if (d->type == KDBUS_MSG_PAYLOAD) {
@@ -565,7 +568,7 @@ int bus_kernel_read_message(sd_bus *bus, sd_bus_message **m) {
int bus_kernel_create(const char *name, char **s) {
struct kdbus_cmd_bus_make *make;
- struct kdbus_cmd_make_item *n, *cg;
+ struct kdbus_item *n, *cg;
size_t l;
int fd;
char *p;
@@ -579,18 +582,18 @@ int bus_kernel_create(const char *name, char **s) {
l = strlen(name);
make = alloca0(offsetof(struct kdbus_cmd_bus_make, items) +
- sizeof(struct kdbus_cmd_make_item) + sizeof(uint64_t) +
- sizeof(struct kdbus_cmd_make_item) + DECIMAL_STR_MAX(uid_t) + 1 + l + 1);
+ KDBUS_ITEM_HEADER_SIZE + sizeof(uint64_t) +
+ KDBUS_ITEM_HEADER_SIZE + DECIMAL_STR_MAX(uid_t) + 1 + l + 1);
cg = make->items;
cg->type = KDBUS_MAKE_CGROUP;
cg->data64[0] = 1;
- cg->size = sizeof(struct kdbus_cmd_make_item) + sizeof(uint64_t);
+ cg->size = KDBUS_ITEM_HEADER_SIZE + sizeof(uint64_t);
n = KDBUS_ITEM_NEXT(cg);
n->type = KDBUS_MAKE_NAME;
sprintf(n->str, "%lu-%s", (unsigned long) getuid(), name);
- n->size = sizeof(struct kdbus_cmd_make_item) + strlen(n->str) + 1;
+ n->size = KDBUS_ITEM_HEADER_SIZE + strlen(n->str) + 1;
make->size = offsetof(struct kdbus_cmd_bus_make, items) + cg->size + n->size;
make->flags = KDBUS_MAKE_ACCESS_WORLD | KDBUS_MAKE_POLICY_OPEN;
diff --git a/src/libsystemd-bus/kdbus.h b/src/libsystemd-bus/kdbus.h
index 6d817b8a2b..049c988a47 100644
--- a/src/libsystemd-bus/kdbus.h
+++ b/src/libsystemd-bus/kdbus.h
@@ -110,12 +110,12 @@ struct kdbus_vec {
};
/**
- * struct kdbus_msg_item - chain of data blocks
+ * struct kdbus_item - chain of data blocks
*
* size: overall data record size
- * type: kdbus_msg_item type of data
+ * type: kdbus_item type of data
*/
-struct kdbus_msg_item {
+struct kdbus_item {
__u64 size;
__u64 type;
union {
@@ -125,14 +125,19 @@ struct kdbus_msg_item {
__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 */
+ int fds[0];
struct kdbus_manager_msg_name_change name_change;
struct kdbus_manager_msg_id_change id_change;
};
@@ -171,7 +176,7 @@ struct kdbus_msg {
__u64 cookie_reply; /* cookie we reply to */
__u64 timeout_ns; /* timespan to wait for reply */
};
- struct kdbus_msg_item items[0];
+ struct kdbus_item items[0];
};
enum {
@@ -233,16 +238,6 @@ enum {
KDBUS_HELLO_NULL,
};
-struct kdbus_cmd_hello_item {
- __u64 size;
- __u64 type;
- union {
- __u8 data[0];
- __u64 data64[0];
- char str[0];
- };
-};
-
struct kdbus_cmd_hello {
__u64 size;
@@ -263,7 +258,7 @@ struct kdbus_cmd_hello {
__u64 id; /* id assigned to this connection */
__u64 bloom_size; /* The bloom filter size chosen by the
* bus owner */
- struct kdbus_cmd_hello_item items[0];
+ struct kdbus_item items[0];
};
/* Flags for kdbus_cmd_{bus,ep,ns}_make */
@@ -286,16 +281,6 @@ enum {
* privileges */
};
-struct kdbus_cmd_make_item {
- __u64 size;
- __u64 type;
- union {
- __u8 data[0];
- __u64 data64[0];
- char str[0];
- };
-};
-
struct kdbus_cmd_bus_make {
__u64 size;
__u64 flags; /* userspace → kernel, kernel → userspace
@@ -307,7 +292,7 @@ struct kdbus_cmd_bus_make {
* structure and returned from
* KDBUS_CMD_HELLO, later */
__u64 bloom_size; /* size of the bloom filter for this bus */
- struct kdbus_cmd_make_item items[0];
+ struct kdbus_item items[0];
};
@@ -319,7 +304,7 @@ struct kdbus_cmd_ep_make {
* same way as for
* KDBUS_CMD_BUS_MAKE. Unused for
* now. */
- struct kdbus_cmd_make_item items[0];
+ struct kdbus_item items[0];
};
struct kdbus_cmd_ns_make {
@@ -330,7 +315,7 @@ struct kdbus_cmd_ns_make {
* same way as for
* KDBUS_CMD_BUS_MAKE. Unused for
* now. */
- struct kdbus_cmd_make_item items[0];
+ struct kdbus_item items[0];
};
enum {
@@ -363,18 +348,12 @@ enum {
KDBUS_NAME_INFO_ITEM_AUDIT, /* kernel → userspace */
};
-struct kdbus_cmd_name_info_item {
- __u64 size;
- __u64 type;
- __u8 data[0];
-};
-
struct kdbus_cmd_name_info {
__u64 size; /* overall size of info */
__u64 flags;
__u64 id; /* either ID, or 0 and _ITEM_NAME follows */
struct kdbus_creds creds;
- struct kdbus_cmd_name_info_item items[0]; /* list of item records */
+ struct kdbus_item items[0]; /* list of item records */
};
enum {
@@ -388,22 +367,12 @@ enum {
KDBUS_MATCH_ID_REMOVE, /* Matches an ID against KDBUS_MSG_ID_REMOVE */
};
-struct kdbus_cmd_match_item {
- __u64 size;
- __u64 type;
- union {
- __u64 id;
- __u8 data[0];
- char str[0];
- };
-};
-
struct kdbus_cmd_match {
__u64 size;
__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 {
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-01 02:34:41 +0000