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-rw-r--r--src/libsystemd-bus/bus-message.c98
-rw-r--r--src/libsystemd-bus/test-bus-zero-copy.c32
2 files changed, 121 insertions, 9 deletions
diff --git a/src/libsystemd-bus/bus-message.c b/src/libsystemd-bus/bus-message.c
index ceac15601e..dbb3337619 100644
--- a/src/libsystemd-bus/bus-message.c
+++ b/src/libsystemd-bus/bus-message.c
@@ -1296,7 +1296,6 @@ int message_append_basic(sd_bus_message *m, char type, const void *p, const void
ssize_t align, sz;
uint32_t k;
void *a;
- char *e = NULL;
int fd = -1;
uint32_t fdi = 0;
int r;
@@ -1320,6 +1319,8 @@ int message_append_basic(sd_bus_message *m, char type, const void *p, const void
if (c->signature[c->index] != type)
return -ENXIO;
} else {
+ char *e;
+
/* Maybe we can append to the signature? But only if this is the top-level container*/
if (c->enclosing != 0)
return -ENXIO;
@@ -1452,7 +1453,6 @@ int sd_bus_message_append_basic(sd_bus_message *m, char type, const void *p) {
int sd_bus_message_append_string_space(sd_bus_message *m, size_t size, char **s) {
struct bus_container *c;
- char *e;
void *a;
if (!m)
@@ -1472,6 +1472,8 @@ int sd_bus_message_append_string_space(sd_bus_message *m, size_t size, char **s)
if (c->signature[c->index] != SD_BUS_TYPE_STRING)
return -ENXIO;
} else {
+ char *e;
+
/* Maybe we can append to the signature? But only if this is the top-level container*/
if (c->enclosing != 0)
return -ENXIO;
@@ -1483,7 +1485,6 @@ int sd_bus_message_append_string_space(sd_bus_message *m, size_t size, char **s)
}
}
-
a = message_extend_body(m, 4, 4 + size + 1);
if (!a)
return -ENOMEM;
@@ -1506,7 +1507,6 @@ static int bus_message_open_array(
uint32_t **array_size) {
unsigned nindex;
- char *e = NULL;
void *a, *op;
int alignment;
size_t os;
@@ -1536,6 +1536,8 @@ static int bus_message_open_array(
nindex = c->index + 1 + strlen(contents);
} else {
+ char *e;
+
if (c->enclosing != 0)
return -ENXIO;
@@ -1579,7 +1581,6 @@ static int bus_message_open_variant(
struct bus_container *c,
const char *contents) {
- char *e = NULL;
size_t l;
void *a;
@@ -1599,6 +1600,8 @@ static int bus_message_open_variant(
return -ENXIO;
} else {
+ char *e;
+
if (c->enclosing != 0)
return -ENXIO;
@@ -1629,7 +1632,6 @@ static int bus_message_open_struct(
const char *contents) {
size_t nindex;
- char *e = NULL;
assert(m);
assert(c);
@@ -1650,6 +1652,8 @@ static int bus_message_open_struct(
nindex = c->index + 1 + l + 1;
} else {
+ char *e;
+
if (c->enclosing != 0)
return -ENXIO;
@@ -2160,7 +2164,7 @@ int sd_bus_message_append_array_memfd(sd_bus_message *m, char type, sd_memfd *me
if (size % sz != 0)
return -EINVAL;
- if (size > (size_t) (uint32_t) -1)
+ if (size > (uint64_t) (uint32_t) -1)
return -EINVAL;
r = sd_bus_message_open_container(m, SD_BUS_TYPE_ARRAY, CHAR_TO_STR(type));
@@ -2186,6 +2190,86 @@ int sd_bus_message_append_array_memfd(sd_bus_message *m, char type, sd_memfd *me
return sd_bus_message_close_container(m);
}
+int sd_bus_message_append_string_memfd(sd_bus_message *m, sd_memfd *memfd) {
+ _cleanup_close_ int copy_fd = -1;
+ struct bus_body_part *part;
+ struct bus_container *c;
+ uint64_t size;
+ void *a;
+ int r;
+
+ if (!m)
+ return -EINVAL;
+ if (!memfd)
+ return -EINVAL;
+ if (m->sealed)
+ return -EPERM;
+ if (m->poisoned)
+ return -ESTALE;
+
+ r = sd_memfd_set_sealed(memfd, true);
+ if (r < 0)
+ return r;
+
+ copy_fd = sd_memfd_dup_fd(memfd);
+ if (copy_fd < 0)
+ return copy_fd;
+
+ r = sd_memfd_get_size(memfd, &size);
+ if (r < 0)
+ return r;
+
+ /* We require this to be NUL terminated */
+ if (size == 0)
+ return -EINVAL;
+
+ if (size > (uint64_t) (uint32_t) -1)
+ return -EINVAL;
+
+ c = message_get_container(m);
+ if (c->signature && c->signature[c->index]) {
+ /* Container signature is already set */
+
+ if (c->signature[c->index] != SD_BUS_TYPE_STRING)
+ return -ENXIO;
+ } else {
+ char *e;
+
+ /* Maybe we can append to the signature? But only if this is the top-level container*/
+ if (c->enclosing != 0)
+ return -ENXIO;
+
+ e = strextend(&c->signature, CHAR_TO_STR(SD_BUS_TYPE_STRING), NULL);
+ if (!e) {
+ m->poisoned = true;
+ return -ENOMEM;
+ }
+ }
+
+ a = message_extend_body(m, 4, 4);
+ if (!a)
+ return -ENOMEM;
+
+ *(uint32_t*) a = size - 1;
+
+ part = message_append_part(m);
+ if (!part)
+ return -ENOMEM;
+
+ part->memfd = copy_fd;
+ part->sealed = true;
+ part->size = size;
+ copy_fd = -1;
+
+ message_extend_containers(m, size);
+ m->header->body_size += size;
+
+ if (c->enclosing != SD_BUS_TYPE_ARRAY)
+ c->index++;
+
+ return 0;
+}
+
int bus_body_part_map(struct bus_body_part *part) {
void *p;
size_t psz;
diff --git a/src/libsystemd-bus/test-bus-zero-copy.c b/src/libsystemd-bus/test-bus-zero-copy.c
index 63bb921456..db3906e274 100644
--- a/src/libsystemd-bus/test-bus-zero-copy.c
+++ b/src/libsystemd-bus/test-bus-zero-copy.c
@@ -34,6 +34,8 @@
#define FIRST_ARRAY 17
#define SECOND_ARRAY 33
+#define STRING_SIZE 123
+
int main(int argc, char *argv[]) {
_cleanup_free_ char *bus_name = NULL, *address = NULL;
uint8_t *p;
@@ -44,6 +46,7 @@ int main(int argc, char *argv[]) {
uint64_t sz;
uint32_t u32;
size_t i, l;
+ char *s;
log_set_max_level(LOG_DEBUG);
@@ -77,7 +80,7 @@ int main(int argc, char *argv[]) {
r = sd_bus_message_new_method_call(b, ":1.1", "/a/path", "an.inter.face", "AMethod", &m);
assert_se(r >= 0);
- r = sd_bus_message_open_container(m, 'r', "ayay");
+ r = sd_bus_message_open_container(m, 'r', "aysay");
assert_se(r >= 0);
r = sd_bus_message_append_array_space(m, 'y', FIRST_ARRAY, (void**) &p);
@@ -85,6 +88,24 @@ int main(int argc, char *argv[]) {
memset(p, 'L', FIRST_ARRAY);
+ r = sd_memfd_new_and_map(&f, STRING_SIZE, (void**) &s);
+ assert_se(r >= 0);
+
+ for (i = 0; i < STRING_SIZE-1; i++)
+ s[i] = '0' + (i % 10);
+
+ s[STRING_SIZE-1] = 0;
+ munmap(s, STRING_SIZE);
+
+ r = sd_memfd_get_size(f, &sz);
+ assert_se(r >= 0);
+ assert_se(sz == STRING_SIZE);
+
+ r = sd_bus_message_append_string_memfd(m, f);
+ assert_se(r >= 0);
+
+ sd_memfd_free(f);
+
r = sd_memfd_new_and_map(&f, SECOND_ARRAY, (void**) &p);
assert_se(r >= 0);
@@ -122,7 +143,7 @@ int main(int argc, char *argv[]) {
bus_message_dump(m);
sd_bus_message_rewind(m, true);
- r = sd_bus_message_enter_container(m, 'r', "ayay");
+ r = sd_bus_message_enter_container(m, 'r', "aysay");
assert_se(r > 0);
r = sd_bus_message_read_array(m, 'y', (const void**) &p, &l);
@@ -132,6 +153,13 @@ int main(int argc, char *argv[]) {
for (i = 0; i < l; i++)
assert_se(p[i] == 'L');
+ r = sd_bus_message_read(m, "s", &s);
+ assert_se(r > 0);
+
+ for (i = 0; i < STRING_SIZE-1; i++)
+ assert_se(s[i] == (char) ('0' + (i % 10)));
+ assert_se(s[STRING_SIZE-1] == 0);
+
r = sd_bus_message_read_array(m, 'y', (const void**) &p, &l);
assert_se(r > 0);
assert_se(l == SECOND_ARRAY);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-05 09:26:54 +0000