/* Write the whole meta-data of inode out */
int sd_inode_write(write_node_fn writer, struct sd_inode *inode, int flags,
bool create, bool direct)
{
uint32_t len;
int ret;
if (inode->store_policy == 0)
ret = writer(vid_to_vdi_oid(inode->vdi_id), inode,
SD_INODE_HEADER_SIZE, 0,
flags, inode->nr_copies, inode->copy_policy,
create, direct);
else {
len = SD_INODE_HEADER_SIZE + sd_inode_get_meta_size(inode, 0);
ret = writer(vid_to_vdi_oid(inode->vdi_id), inode, len, 0,
flags, inode->nr_copies, inode->copy_policy,
create, false);
if (ret != SD_RES_SUCCESS)
goto out;
ret = writer(vid_to_vdi_oid(inode->vdi_id), inode,
sizeof(uint32_t),
offsetof(struct sd_inode, btree_counter), flags,
inode->nr_copies, inode->copy_policy,
create, false);
}
out:
return ret;
}
int parse_vdi(vdi_parser_func_t func, size_t size, void *data)
{
int ret;
unsigned long nr;
struct sd_inode *i = xmalloc(sizeof(*i));
struct sd_req req;
struct sd_rsp *rsp = (struct sd_rsp *)&req;
static DECLARE_BITMAP(vdi_inuse, SD_NR_VDIS);
uint32_t rlen;
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);
/* for B-tree inode, we also need sd_index_header */
ret = dog_read_object(oid, i, SD_INODE_HEADER_SIZE +
sizeof(struct sd_index_header), 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 = sd_inode_get_meta_size(i, size);
ret = dog_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);
}
