/* Light request only contains header, without body content. */
int send_light_req(struct sd_req *hdr, const char *host, int port)
{
int ret = collie_exec_req(host, port, hdr, NULL);
if (ret == -1)
return -1;
if (ret != SD_RES_SUCCESS) {
fprintf(stderr, "Response's result: %s\n",
sd_strerror(ret));
return -1;
}
return 0;
}
int sd_write_object(uint64_t oid, uint64_t cow_oid, void *data,
unsigned int datalen, uint64_t offset, uint32_t flags,
int copies, bool create, bool direct)
{
struct sd_req hdr;
struct sd_rsp *rsp = (struct sd_rsp *)&hdr;
int fd, ret;
fd = connect_to(sdhost, sdport);
if (fd < 0) {
fprintf(stderr, "Failed to connect\n");
return SD_RES_EIO;
}
if (create)
sd_init_req(&hdr, SD_OP_CREATE_AND_WRITE_OBJ);
else
sd_init_req(&hdr, SD_OP_WRITE_OBJ);
hdr.data_length = datalen;
hdr.flags = flags | SD_FLAG_CMD_WRITE;
if (cow_oid)
hdr.flags |= SD_FLAG_CMD_COW;
if (direct)
hdr.flags |= SD_FLAG_CMD_DIRECT;
hdr.obj.copies = copies;
hdr.obj.oid = oid;
hdr.obj.cow_oid = cow_oid;
hdr.obj.offset = offset;
ret = collie_exec_req(fd, &hdr, data);
close(fd);
if (ret) {
fprintf(stderr, "Failed to write object %" PRIx64 "\n", oid);
return SD_RES_EIO;
}
if (rsp->result != SD_RES_SUCCESS) {
fprintf(stderr, "Failed to write object %" PRIx64 ": %s\n", oid,
sd_strerror(rsp->result));
return rsp->result;
}
return SD_RES_SUCCESS;
}
int sd_read_object(uint64_t oid, void *data, unsigned int datalen,
uint64_t offset, bool direct)
{
struct sd_req hdr;
struct sd_rsp *rsp = (struct sd_rsp *)&hdr;
int fd, ret;
fd = connect_to(sdhost, sdport);
if (fd < 0) {
fprintf(stderr, "Failed to connect\n");
return SD_RES_EIO;
}
sd_init_req(&hdr, SD_OP_READ_OBJ);
hdr.data_length = datalen;
hdr.obj.oid = oid;
hdr.obj.offset = offset;
if (direct)
hdr.flags |= SD_FLAG_CMD_DIRECT;
ret = collie_exec_req(fd, &hdr, data);
close(fd);
if (ret) {
fprintf(stderr, "Failed to read object %" PRIx64 "\n", oid);
return SD_RES_EIO;
}
if (rsp->result != SD_RES_SUCCESS) {
fprintf(stderr, "Failed to read object %" PRIx64 " %s\n", oid,
sd_strerror(rsp->result));
return rsp->result;
}
untrim_zero_sectors(data, rsp->obj.offset, rsp->data_length, datalen);
return SD_RES_SUCCESS;
}
int send_light_req_get_response(struct sd_req *hdr, const char *host, int port)
{
int fd, ret;
struct sd_rsp *rsp = (struct sd_rsp *)hdr;
fd = connect_to(host, port);
if (fd < 0)
return -1;
ret = collie_exec_req(fd, hdr, NULL);
close(fd);
if (ret) {
fprintf(stderr, "failed to connect to %s:%d\n",
host, port);
return -1;
}
if (rsp->result != SD_RES_SUCCESS)
return rsp->result;
return SD_RES_SUCCESS;
}
int parse_vdi(vdi_parser_func_t func, size_t size, void *data)
{
int ret, fd;
unsigned long nr;
static struct sheepdog_inode i;
struct sd_req req;
static DECLARE_BITMAP(vdi_inuse, SD_NR_VDIS);
unsigned int rlen = sizeof(vdi_inuse);
fd = connect_to(sdhost, sdport);
if (fd < 0) {
fprintf(stderr, "Failed to connect to %s:%d\n", sdhost, sdport);
ret = -1;
goto out;
}
sd_init_req(&req, SD_OP_READ_VDIS);
req.data_length = sizeof(vdi_inuse);
ret = collie_exec_req(fd, &req, &vdi_inuse);
if (ret < 0) {
fprintf(stderr, "Failed to read VDIs from %s:%d\n",
sdhost, sdport);
close(fd);
goto out;
}
close(fd);
for (nr = 0; nr < SD_NR_VDIS; nr++) {
uint64_t oid;
uint32_t snapid;
if (!test_bit(nr, vdi_inuse))
continue;
oid = vid_to_vdi_oid(nr);
memset(&i, 0, sizeof(i));
ret = sd_read_object(oid, &i, SD_INODE_HEADER_SIZE, 0, true);
if (ret != SD_RES_SUCCESS) {
fprintf(stderr, "Failed to read inode header\n");
continue;
}
if (i.name[0] == '\0') /* this VDI has been deleted */
continue;
if (size > SD_INODE_HEADER_SIZE) {
rlen = DIV_ROUND_UP(i.vdi_size, SD_DATA_OBJ_SIZE) *
sizeof(i.data_vdi_id[0]);
if (rlen > size - SD_INODE_HEADER_SIZE)
rlen = size - SD_INODE_HEADER_SIZE;
ret = sd_read_object(oid, ((char *)&i) + SD_INODE_HEADER_SIZE,
rlen, SD_INODE_HEADER_SIZE, true);
if (ret != SD_RES_SUCCESS) {
fprintf(stderr, "Failed to read inode\n");
continue;
}
}
snapid = is_current(&i) ? 0 : i.snap_id;
func(i.vdi_id, i.name, i.tag, snapid, 0, &i, data);
}
out:
return ret;
}
