diff options
Diffstat (limited to 'tests/crypto/get_dm_versions.c')
-rw-r--r-- | tests/crypto/get_dm_versions.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/tests/crypto/get_dm_versions.c b/tests/crypto/get_dm_versions.c new file mode 100644 index 00000000..6df74918 --- /dev/null +++ b/tests/crypto/get_dm_versions.c @@ -0,0 +1,57 @@ +#include <stdio.h> +#include <fcntl.h> +#include <unistd.h> +#include <sys/ioctl.h> +#include <linux/dm-ioctl.h> +#include <stdlib.h> + +#define DM_CRYPT_BUF_SIZE 4096 + +static void ioctl_init(struct dm_ioctl *io, size_t dataSize, const char *name, unsigned flags) +{ + memset(io, 0, dataSize); + io->data_size = dataSize; + io->data_start = sizeof(struct dm_ioctl); + io->version[0] = 4; + io->version[1] = 0; + io->version[2] = 0; + io->flags = flags; + if (name) { + strncpy(io->name, name, sizeof(io->name)); + } +} + +int main(int argc, char *argv[]) +{ + char buffer[DM_CRYPT_BUF_SIZE]; + struct dm_ioctl *io; + struct dm_target_versions *v; + int i; + int fd; + + fd = open("/dev/device-mapper", O_RDWR); + if (fd < 0) { + fprintf(stderr, "Cannot open /dev/device-mapper\n"); + exit(1); + } + + io = (struct dm_ioctl *) buffer; + + ioctl_init(io, DM_CRYPT_BUF_SIZE, NULL, 0); + + if (ioctl(fd, DM_LIST_VERSIONS, io)) { + fprintf(stderr, "ioctl(DM_LIST_VERSIONS) returned an error\n"); + exit(1); + } + + /* Iterate over the returned versions, and print each subsystem's version */ + v = (struct dm_target_versions *) &buffer[sizeof(struct dm_ioctl)]; + while (v->next) { + printf("%s: %d.%d.%d\n", v->name, v->version[0], v->version[1], v->version[2]); + v = (struct dm_target_versions *)(((char *)v) + v->next); + } + + close(fd); + exit(0); +} + |