static void mfd_fail_new(const char *name, unsigned int flags)
{
int r;
r = sys_memfd_create(name, flags);
if (r >= 0) {
printf("memfd_create(\"%s\", %u) succeeded, but failure expected\n",
name, flags);
close(r);
abort();
}
}
void check_mfd_fail_new(const char *filename, const int lineno,
const char *name, int flags)
{
int fd;
fd = sys_memfd_create(name, flags);
if (fd >= 0) {
safe_close(filename, lineno, NULL, fd);
tst_brk_(filename, lineno, TFAIL,
"memfd_create(%s, %d) succeeded unexpectedly",
name, flags);
}
tst_res_(filename, lineno, TPASS | TERRNO,
"memfd_create(%s, %d) failed as expected", name, flags);
}
int mfd_flags_available(const char *filename, const int lineno,
unsigned int flags)
{
TEST(sys_memfd_create("dummy_call", flags));
if (TEST_RETURN < 0) {
if (TEST_ERRNO != EINVAL) {
tst_brk_(filename, lineno, TBROK | TTERRNO,
"memfd_create() failed");
}
return 0;
}
SAFE_CLOSE(TEST_RETURN);
return 1;
}
int check_mfd_new(const char *filename, const int lineno,
const char *name, loff_t sz, int flags)
{
int fd;
fd = sys_memfd_create(name, flags);
if (fd < 0) {
tst_brk_(filename, lineno, TBROK | TERRNO,
"memfd_create(%s, %d) failed", name, flags);
}
tst_res_(filename, lineno, TPASS, "memfd_create(%s, %d) succeeded",
name, flags);
check_ftruncate(filename, lineno, fd, sz);
return fd;
}
static int mfd_assert_new(const char *name, loff_t sz, unsigned int flags)
{
int r, fd;
fd = sys_memfd_create(name, flags);
if (fd < 0) {
printf("memfd_create(\"%s\", %u) failed: %m\n",
name, flags);
abort();
}
r = ftruncate(fd, sz);
if (r < 0) {
printf("ftruncate(%llu) failed: %m\n", (unsigned long long)sz);
abort();
}
return fd;
}
int get_shmem_fd(int pid, VmaEntry *vi)
{
struct shmem_info *si;
void *addr = MAP_FAILED;
int f = -1;
int flags;
si = find_shmem_by_id(vi->shmid);
pr_info("Search for 0x%016"PRIx64" shmem 0x%"PRIx64" %p/%d\n", vi->start, vi->shmid, si, si ? si->pid : -1);
if (!si) {
pr_err("Can't find my shmem 0x%016"PRIx64"\n", vi->start);
return -1;
}
if (si->pid != pid)
return shmem_wait_and_open(pid, si);
if (si->fd != -1)
return dup(si->fd);
flags = MAP_SHARED;
if (kdat.has_memfd) {
f = sys_memfd_create("", 0);
if (f < 0) {
pr_perror("Unable to create memfd");
goto err;
}
if (ftruncate(f, si->size)) {
pr_perror("Unable to truncate memfd");
goto err;
}
flags |= MAP_FILE;
} else
flags |= MAP_ANONYMOUS;
/*
* The following hack solves problems:
* vi->pgoff may be not zero in a target process.
* This mapping may be mapped more then once.
* The restorer doesn't have snprintf.
* Here is a good place to restore content
*/
addr = mmap(NULL, si->size, PROT_WRITE | PROT_READ, flags, f, 0);
if (addr == MAP_FAILED) {
pr_err("Can't mmap shmid=0x%"PRIx64" size=%ld\n",
vi->shmid, si->size);
goto err;
}
if (restore_shmem_content(addr, si) < 0) {
pr_err("Can't restore shmem content\n");
goto err;
}
if (f == -1) {
f = open_proc_rw(getpid(), "map_files/%lx-%lx",
(unsigned long) addr,
(unsigned long) addr + si->size);
if (f < 0)
goto err;
}
munmap(addr, si->size);
si->fd = f;
/* Send signal to slaves, that they can open fd for this shmem */
futex_inc_and_wake(&si->lock);
/*
* All other regions in this process will duplicate
* the file descriptor, so we don't wait them.
*/
futex_wait_until(&si->lock, si->count - si->self_count + 1);
return f;
err:
if (addr != MAP_FAILED)
munmap(addr, si->size);
close_safe(&f);
return -1;
}
int kdbus_msg_send(const struct kdbus_conn *conn,
const char *name,
uint64_t cookie,
uint64_t flags,
uint64_t timeout,
int64_t priority,
uint64_t dst_id)
{
struct kdbus_msg *msg;
const char ref1[1024 * 128 + 3] = "0123456789_0";
const char ref2[] = "0123456789_1";
struct kdbus_item *item;
uint64_t size;
int memfd = -1;
int ret;
size = sizeof(struct kdbus_msg);
size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
if (dst_id == KDBUS_DST_ID_BROADCAST)
size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_bloom_filter)) + 64;
else {
memfd = sys_memfd_create("my-name-is-nice", 1024 * 1024);
if (memfd < 0) {
kdbus_printf("failed to create memfd: %m\n");
return memfd;
}
if (write(memfd, "kdbus memfd 1234567", 19) != 19) {
ret = -errno;
kdbus_printf("writing to memfd failed: %m\n");
return ret;
}
ret = sys_memfd_seal_set(memfd);
if (ret < 0) {
ret = -errno;
kdbus_printf("memfd sealing failed: %m\n");
return ret;
}
size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_memfd));
}
if (name)
size += KDBUS_ITEM_SIZE(strlen(name) + 1);
msg = malloc(size);
if (!msg) {
ret = -errno;
kdbus_printf("unable to malloc()!?\n");
return ret;
}
memset(msg, 0, size);
msg->flags = flags;
msg->timeout_ns = timeout;
msg->priority = priority;
msg->size = size;
msg->src_id = conn->id;
msg->dst_id = name ? 0 : dst_id;
msg->cookie = cookie;
msg->payload_type = KDBUS_PAYLOAD_DBUS;
item = msg->items;
if (name) {
item->type = KDBUS_ITEM_DST_NAME;
item->size = KDBUS_ITEM_HEADER_SIZE + strlen(name) + 1;
strcpy(item->str, name);
item = KDBUS_ITEM_NEXT(item);
}
item->type = KDBUS_ITEM_PAYLOAD_VEC;
item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_vec);
item->vec.address = (uintptr_t)&ref1;
item->vec.size = sizeof(ref1);
item = KDBUS_ITEM_NEXT(item);
/* data padding for ref1 */
item->type = KDBUS_ITEM_PAYLOAD_VEC;
item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_vec);
item->vec.address = (uintptr_t)NULL;
item->vec.size = KDBUS_ALIGN8(sizeof(ref1)) - sizeof(ref1);
item = KDBUS_ITEM_NEXT(item);
item->type = KDBUS_ITEM_PAYLOAD_VEC;
item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_vec);
item->vec.address = (uintptr_t)&ref2;
item->vec.size = sizeof(ref2);
item = KDBUS_ITEM_NEXT(item);
if (dst_id == KDBUS_DST_ID_BROADCAST) {
item->type = KDBUS_ITEM_BLOOM_FILTER;
item->size = KDBUS_ITEM_SIZE(sizeof(struct kdbus_bloom_filter)) + 64;
item->bloom_filter.generation = 0;
} else {
item->type = KDBUS_ITEM_PAYLOAD_MEMFD;
item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_memfd);
item->memfd.size = 16;
item->memfd.fd = memfd;
}
item = KDBUS_ITEM_NEXT(item);
ret = ioctl(conn->fd, KDBUS_CMD_MSG_SEND, msg);
if (ret < 0) {
ret = -errno;
kdbus_printf("error sending message: %d (%m)\n", ret);
return ret;
}
if (memfd >= 0)
close(memfd);
if (flags & KDBUS_MSG_FLAGS_SYNC_REPLY) {
struct kdbus_msg *reply;
kdbus_printf("SYNC REPLY @offset %llu:\n", msg->offset_reply);
reply = (struct kdbus_msg *)(conn->buf + msg->offset_reply);
kdbus_msg_dump(conn, reply);
ret = kdbus_free(conn, msg->offset_reply);
if (ret < 0)
return ret;
}
free(msg);
return 0;
}