static void recovery_xdata_block(struct hmfs_sb_info *sbi, seg_t src_segno,
int src_off, struct hmfs_summary *src_sum)
{
struct gc_move_arg arg;
struct hmfs_node *last = NULL, *this = NULL;
struct hmfs_cm_info *cm_i = CM_I(sbi);
block_t addr_in_par;
bool modify_vb = false;
int x_tag;
prepare_move_argument(&arg, sbi, src_segno, src_off, src_sum,
TYPE_DATA);
while (1) {
this = __get_node(sbi, arg.cp_i, arg.nid);
if (IS_ERR(this))
break;
if (this == last)
goto next;
x_tag = le64_to_cpu(XATTR_HDR(arg.src)->h_magic);
addr_in_par = XBLOCK_ADDR(this, x_tag);
if (addr_in_par != arg.src_addr && is_valid_address(sbi, addr_in_par)) {
break;
}
if (addr_in_par != arg.src_addr) {
hmfs_memcpy_atomic(JUMP(this, x_tag), &arg.src_addr, 8);
if (!modify_vb) {
arg.dest_sum = get_summary_by_addr(sbi, addr_in_par);
clear_summary_valid_bit(arg.dest_sum);
modify_vb = true;
}
}
last = this;
next:
if (arg.cp_i == cm_i->last_cp_i)
break;
arg.cp_i = get_next_checkpoint_info(sbi, arg.cp_i);
}
}
static void recovery_gc_segment(struct hmfs_sb_info *sbi, seg_t segno)
{
int off = 0;
struct hmfs_cm_info *cm_i = CM_I(sbi);
bool is_current;
struct hmfs_summary *sum;
block_t seg_addr;
seg_addr = __cal_page_addr(sbi, segno, 0);
sum = get_summary_by_addr(sbi, seg_addr);
for (off = 0; off < HMFS_PAGE_PER_SEG; ++off, sum++) {
is_current = get_summary_start_version(sum) == cm_i->new_version;
if ((!get_summary_valid_bit(sum) && !is_current) || is_current)
continue;
switch (get_summary_type(sum)) {
case SUM_TYPE_DATA:
recovery_data_block(sbi, segno, off, sum);
break;
case SUM_TYPE_XDATA:
recovery_xdata_block(sbi, segno, off, sum);
break;
case SUM_TYPE_INODE:
case SUM_TYPE_DN:
case SUM_TYPE_IDN:
recovery_node_block(sbi, segno, off, sum);
break;
case SUM_TYPE_NATN:
case SUM_TYPE_NATD:
recovery_nat_block(sbi, segno, off, sum);
break;
case SUM_TYPE_ORPHAN:
recovery_orphan_block(sbi, segno, off, sum);
break;
case SUM_TYPE_CP:
recovery_checkpoint_block(sbi, segno, off, sum);
break;
default:
hmfs_bug_on(sbi, 1);
}
}
}
static void setup_summary_of_delete_block(struct hmfs_sb_info *sbi,
block_t blk_addr)
{
struct hmfs_summary *sum;
struct hmfs_cm_info *cm_i = CM_I(sbi);
int count;
sum = get_summary_by_addr(sbi, blk_addr);
count = get_summary_count(sum) - 1;
set_summary_count(sum, count);
#ifdef CONFIG_DEBUG
BUG_ON(count < 0);
#endif
if (!count) {
set_summary_dead_version(sum, cm_i->new_version);
invalidate_block_after_dc(sbi, blk_addr);
}
}
static void recovery_node_block(struct hmfs_sb_info *sbi, seg_t src_segno,
unsigned int src_off, struct hmfs_summary *src_sum)
{
struct hmfs_nat_block *last = NULL, *this = NULL;
struct gc_move_arg args;
block_t addr_in_par;
bool modify_vb = false;
prepare_move_argument(&args, sbi, src_segno, src_off, src_sum, TYPE_NODE);
while (1) {
this = get_nat_entry_block(sbi, args.cp_i->version, args.nid);
if (IS_ERR(this))
break;
if (this == last)
goto next;
addr_in_par = le64_to_cpu(this->entries[args.ofs_in_node].block_addr);
/* Src node has been COW or removed */
if (addr_in_par != args.src_addr && is_valid_address(sbi, addr_in_par)) {
break;
}
if (addr_in_par != args.src_addr) {
hmfs_memcpy_atomic(&this->entries[args.ofs_in_node].block_addr,
&args.src_addr, 8);
if (!modify_vb) {
args.dest_sum = get_summary_by_addr(sbi, addr_in_par);
clear_summary_valid_bit(args.dest_sum);
modify_vb = true;
}
}
last = this;
next:
if (args.cp_i == CM_I(sbi)->last_cp_i)
break;
args.cp_i = get_next_checkpoint_info(sbi, args.cp_i);
}
}
static void recovery_nat_block(struct hmfs_sb_info *sbi, seg_t src_segno, int src_off,
struct hmfs_summary *src_sum)
{
void *last = NULL, *this = NULL;
struct hmfs_checkpoint *hmfs_cp = NULL;
struct hmfs_nat_node *nat_node = NULL;
struct gc_move_arg args;
bool modify_vb = false;
nid_t par_nid;
block_t addr_in_par;
prepare_move_argument(&args, sbi, src_segno, src_off, src_sum, TYPE_NODE);
while (1) {
if (IS_NAT_ROOT(args.nid))
this = args.cp_i->cp;
else {
par_nid = MAKE_NAT_NODE_NID(GET_NAT_NODE_HEIGHT(args.nid) - 1,
GET_NAT_NODE_OFS(args.nid));
this = get_nat_node(sbi, args.cp_i->version, par_nid);
}
hmfs_bug_on(sbi, !this);
if (this == last)
goto next;
if (IS_NAT_ROOT(args.nid)) {
hmfs_cp = HMFS_CHECKPOINT(this);
addr_in_par = le64_to_cpu(hmfs_cp->nat_addr);
} else {
nat_node = HMFS_NAT_NODE(this);
addr_in_par = le64_to_cpu(nat_node->addr[args.ofs_in_node]);
}
if (addr_in_par != args.src_addr && is_valid_address(sbi, addr_in_par)) {
break;
}
if (addr_in_par != args.src_addr) {
if (IS_NAT_ROOT(args.nid)) {
hmfs_memcpy_atomic(&hmfs_cp->nat_addr, &args.src_addr, 8);
} else {
hmfs_memcpy_atomic(&nat_node->addr[args.ofs_in_node],
&args.src_addr, 8);
}
if (!modify_vb) {
args.dest_sum = get_summary_by_addr(sbi, addr_in_par);
clear_summary_valid_bit(args.dest_sum);
modify_vb = true;
}
}
last = this;
next:
if (args.cp_i == CM_I(sbi)->last_cp_i)
break;
args.cp_i = get_next_checkpoint_info(sbi, args.cp_i);
}
}
static void recovery_data_block(struct hmfs_sb_info *sbi, seg_t src_segno,
int src_off, struct hmfs_summary *src_sum)
{
struct gc_move_arg args;
struct hmfs_node *last = NULL, *this = NULL;
struct hmfs_summary *par_sum;
struct hmfs_cm_info *cm_i = CM_I(sbi);
bool modify_vb = false;
block_t addr_in_par;
int par_type;
prepare_move_argument(&args, sbi, src_segno, src_off, src_sum,
TYPE_DATA);
while (1) {
this = __get_node(sbi, args.cp_i, args.nid);
par_sum = get_summary_by_addr(sbi, L_ADDR(sbi, this));
if (IS_ERR(this)) {
/* the node(args.nid) has been deleted */
break;
}
if (this == last)
goto next;
par_type = get_summary_type(par_sum);
if (par_type == SUM_TYPE_INODE) {
addr_in_par = le64_to_cpu(this->i.i_addr[args.ofs_in_node]);
} else {
addr_in_par = le64_to_cpu(this->dn.addr[args.ofs_in_node]);
}
/*
* In recovery, the address stored in parent node would be
* arg.src_addr or an invalid address. Because GC might terminate
* in the loop change this address.
* Condition addr_in_par != args.src_addr is not sufficient
* to terminate recovery. For example, we delete a node in a
* checkpoint and reuse it later. And address in reused node
* is not equal to args.src_addr but we could not modify it.
* Luckly, the child block in that node is valid and we could
* judge this case by the value of address.
*/
if (addr_in_par != args.src_addr && is_valid_address(sbi, addr_in_par))
break;
if (addr_in_par != args.src_addr) {
/* Recover address in parent node */
if (par_type == SUM_TYPE_INODE) {
hmfs_memcpy_atomic(&this->i.i_addr[args.ofs_in_node],
&args.src_addr, 8);
} else {
hmfs_memcpy_atomic(&this->dn.addr[args.ofs_in_node],
&args.src_addr, 8);
}
if (!modify_vb) {
args.dest_sum = get_summary_by_addr(sbi, addr_in_par);
clear_summary_valid_bit(args.dest_sum);
modify_vb = true;
}
}
last = this;
next:
if (args.cp_i == cm_i->last_cp_i)
break;
args.cp_i = get_next_checkpoint_info(sbi, args.cp_i);
}
}
