/*
* Read data firstly from local object cache(if enabled), if fail,
* try read backends
*/
int read_object(uint64_t oid, char *data, unsigned int datalen,
uint64_t offset)
{
int ret;
if (sys->enable_object_cache && object_is_cached(oid)) {
ret = object_cache_read(oid, data, datalen, offset);
if (ret != SD_RES_SUCCESS) {
sd_eprintf("try forward read %"PRIx64" %s", oid,
sd_strerror(ret));
goto forward_read;
}
return ret;
}
forward_read:
return read_backend_object(oid, data, datalen, offset);
}
int sd_remove_object(uint64_t oid)
{
struct sd_req hdr;
int ret;
if (sys->enable_object_cache && object_is_cached(oid)) {
ret = object_cache_remove(oid);
if (ret != SD_RES_SUCCESS)
return ret;
}
sd_init_req(&hdr, SD_OP_REMOVE_OBJ);
hdr.obj.oid = oid;
ret = exec_local_req(&hdr, NULL);
if (ret != SD_RES_SUCCESS)
sd_err("failed to remove object %" PRIx64 ", %s", oid,
sd_strerror(ret));
return ret;
}
/* Write data to both local object cache (if enabled) and backends */
int write_object(uint64_t oid, char *data, unsigned int datalen,
uint64_t offset, bool create)
{
struct sd_req hdr;
int ret;
if (sys->enable_object_cache && object_is_cached(oid)) {
ret = object_cache_write(oid, data, datalen, offset,
create);
if (ret == SD_RES_NO_CACHE)
goto forward_write;
if (ret != 0) {
sd_eprintf("write cache failed %"PRIx64" %"PRIx32, oid,
ret);
return ret;
}
}
forward_write:
if (create)
sd_init_req(&hdr, SD_OP_CREATE_AND_WRITE_OBJ);
else
sd_init_req(&hdr, SD_OP_WRITE_OBJ);
hdr.flags = SD_FLAG_CMD_WRITE;
hdr.data_length = datalen;
hdr.obj.oid = oid;
hdr.obj.offset = offset;
hdr.obj.copies = get_vdi_copy_number(oid_to_vid(oid));
ret = exec_local_req(&hdr, data);
if (ret != SD_RES_SUCCESS)
sd_eprintf("failed to write object %" PRIx64 ", %s", oid,
sd_strerror(ret));
return ret;
}
