int parse_vdi(vdi_parser_func_t func, size_t size, void *data)
{
int ret;
unsigned long nr;
static struct sd_inode i;
struct sd_req req;
struct sd_rsp *rsp = (struct sd_rsp *)&req;
static DECLARE_BITMAP(vdi_inuse, SD_NR_VDIS);
unsigned int rlen = sizeof(vdi_inuse);
sd_init_req(&req, SD_OP_READ_VDIS);
req.data_length = sizeof(vdi_inuse);
ret = dog_exec_req(&sd_nid, &req, &vdi_inuse);
if (ret < 0)
goto out;
if (rsp->result != SD_RES_SUCCESS) {
sd_err("%s", sd_strerror(rsp->result));
goto out;
}
FOR_EACH_VDI(nr, vdi_inuse) {
uint64_t oid;
uint32_t snapid;
oid = vid_to_vdi_oid(nr);
ret = sd_read_object(oid, &i, SD_INODE_HEADER_SIZE, 0, true);
if (ret != SD_RES_SUCCESS) {
sd_err("Failed to read inode header");
continue;
}
if (i.name[0] == '\0') /* this VDI has been deleted */
continue;
if (size > SD_INODE_HEADER_SIZE) {
rlen = count_data_objs(&i) * 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) {
sd_err("Failed to read inode");
continue;
}
}
snapid = vdi_is_snapshot(&i) ? i.snap_id : 0;
func(i.vdi_id, i.name, i.tag, snapid, 0, &i, data);
}
/*
* Return the size of meta-data in inode->data_vdi_id. When leaf-node of B-tree
* is not full, we don't need to read out all sizeof(sd_inode).
* The argument of 'size' is just for compatibility of parse_vdi().
*/
uint32_t sd_inode_get_meta_size(struct sd_inode *inode, size_t size)
{
struct sd_extent_header *header;
uint32_t len;
if (inode->store_policy == 0) {
len = count_data_objs(inode) * sizeof(inode->data_vdi_id[0]);
if (len > size - SD_INODE_HEADER_SIZE - sizeof(uint32_t))
len = size - SD_INODE_HEADER_SIZE - sizeof(uint32_t);
} else {
header = EXT_HEADER(inode->data_vdi_id);
len = sizeof(struct sd_extent_header);
if (header->depth == 1)
len += sizeof(struct sd_extent) * header->entries;
else if (header->depth == 2)
len += sizeof(struct sd_extent_idx) * header->entries;
else
panic("Depth of B-tree is out of range(depth: %u)",
header->depth);
}
return len;
}
