void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int follow)
{
int i;
u32 nr;
u32 size;
struct btrfs_disk_key disk_key;
struct btrfs_key key;
if (!eb)
return;
nr = btrfs_header_nritems(eb);
if (btrfs_is_leaf(eb)) {
btrfs_print_leaf(root, eb);
return;
}
printf("node %llu level %d items %d free %u generation %llu owner %llu\n",
(unsigned long long)eb->start,
btrfs_header_level(eb), nr,
(u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
(unsigned long long)btrfs_header_generation(eb),
(unsigned long long)btrfs_header_owner(eb));
print_uuids(eb);
fflush(stdout);
size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
for (i = 0; i < nr; i++) {
u64 blocknr = btrfs_node_blockptr(eb, i);
btrfs_node_key(eb, &disk_key, i);
btrfs_disk_key_to_cpu(&key, &disk_key);
printf("\t");
btrfs_print_key(&disk_key);
printf(" block %llu (%llu) gen %llu\n",
(unsigned long long)blocknr,
(unsigned long long)blocknr / size,
(unsigned long long)btrfs_node_ptr_generation(eb, i));
fflush(stdout);
}
if (!follow)
return;
for (i = 0; i < nr; i++) {
struct extent_buffer *next = read_tree_block(root,
btrfs_node_blockptr(eb, i),
size,
btrfs_node_ptr_generation(eb, i));
if (!next) {
fprintf(stderr, "failed to read %llu in tree %llu\n",
(unsigned long long)btrfs_node_blockptr(eb, i),
(unsigned long long)btrfs_header_owner(eb));
continue;
}
if (btrfs_is_leaf(next) &&
btrfs_header_level(eb) != 1)
BUG();
if (btrfs_header_level(next) !=
btrfs_header_level(eb) - 1)
BUG();
btrfs_print_tree(root, next, 1);
free_extent_buffer(next);
}
}
static void print_extents(struct btrfs_root *root, struct extent_buffer *eb)
{
int i;
u32 nr;
u32 size;
if (!eb)
return;
if (btrfs_is_leaf(eb)) {
btrfs_print_leaf(root, eb);
return;
}
size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
nr = btrfs_header_nritems(eb);
for (i = 0; i < nr; i++) {
struct extent_buffer *next = read_tree_block(root,
btrfs_node_blockptr(eb, i),
size,
btrfs_node_ptr_generation(eb, i));
if (!extent_buffer_uptodate(next))
continue;
if (btrfs_is_leaf(next) &&
btrfs_header_level(eb) != 1)
BUG();
if (btrfs_header_level(next) !=
btrfs_header_level(eb) - 1)
BUG();
print_extents(root, next);
free_extent_buffer(next);
}
}
void btrfs_print_tree(struct btrfs_fs_info *fs_info, struct extent_buffer *c)
{
int i; u32 nr;
struct btrfs_key key;
int level;
if (!c)
return;
nr = btrfs_header_nritems(c);
level = btrfs_header_level(c);
if (level == 0) {
btrfs_print_leaf(fs_info, c);
return;
}
btrfs_info(fs_info,
"node %llu level %d total ptrs %d free spc %u",
btrfs_header_bytenr(c), level, nr,
(u32)BTRFS_NODEPTRS_PER_BLOCK(fs_info) - nr);
for (i = 0; i < nr; i++) {
btrfs_node_key_to_cpu(c, &key, i);
pr_info("\tkey %d (%llu %u %llu) block %llu\n",
i, key.objectid, key.type, key.offset,
btrfs_node_blockptr(c, i));
}
for (i = 0; i < nr; i++) {
struct extent_buffer *next = read_tree_block(fs_info,
btrfs_node_blockptr(c, i),
btrfs_node_ptr_generation(c, i));
if (IS_ERR(next)) {
continue;
} else if (!extent_buffer_uptodate(next)) {
free_extent_buffer(next);
continue;
}
if (btrfs_is_leaf(next) &&
level != 1)
BUG();
if (btrfs_header_level(next) !=
level - 1)
BUG();
btrfs_print_tree(fs_info, next);
free_extent_buffer(next);
}
}
void btrfs_print_tree(struct btrfs_root *root, struct btrfs_buffer *t)
{
unsigned int i;
u32 nr;
struct btrfs_node *c;
if (!t)
return;
c = &t->node;
nr = btrfs_header_nritems(&c->header);
if (btrfs_is_leaf(c)) {
btrfs_print_leaf(root, (struct btrfs_leaf *)c);
return;
}
printf("node %llu level %d ptrs %d free %u generation %llu owner %llu\n",
(u64)t->blocknr,
btrfs_header_level(&c->header), nr,
(u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
(u64)btrfs_header_generation(&c->header),
(u64)btrfs_header_owner(&c->header));
fflush(stdout);
for (i = 0; i < nr; i++) {
printf("\tkey %d (%llu %x %llu) block %llu\n",
i,
(u64)c->ptrs[i].key.objectid,
c->ptrs[i].key.flags,
(u64)c->ptrs[i].key.offset,
(u64)btrfs_node_blockptr(c, i));
fflush(stdout);
}
for (i = 0; i < nr; i++) {
struct btrfs_buffer *next_buf = read_tree_block(root,
btrfs_node_blockptr(c, i));
struct btrfs_node *next = &next_buf->node;
if (btrfs_is_leaf(next) &&
btrfs_header_level(&c->header) != 1)
BUG();
if (btrfs_header_level(&next->header) !=
btrfs_header_level(&c->header) - 1)
BUG();
btrfs_print_tree(root, next_buf);
btrfs_block_release(root, next_buf);
}
}
void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
{
int i; u32 nr;
struct btrfs_key key;
int level;
if (!c)
return;
nr = btrfs_header_nritems(c);
level = btrfs_header_level(c);
if (level == 0) {
btrfs_print_leaf(root, c);
return;
}
printk(KERN_INFO "node %llu level %d total ptrs %d free spc %u\n",
(unsigned long long)btrfs_header_bytenr(c),
level, nr,
(u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
for (i = 0; i < nr; i++) {
btrfs_node_key_to_cpu(c, &key, i);
printk(KERN_INFO "\tkey %d (%llu %u %llu) block %llu\n",
i,
(unsigned long long)key.objectid,
key.type,
(unsigned long long)key.offset,
(unsigned long long)btrfs_node_blockptr(c, i));
}
for (i = 0; i < nr; i++) {
struct extent_buffer *next = read_tree_block(root,
btrfs_node_blockptr(c, i),
btrfs_level_size(root, level - 1),
btrfs_node_ptr_generation(c, i));
if (btrfs_is_leaf(next) &&
level != 1)
BUG();
if (btrfs_header_level(next) !=
level - 1)
BUG();
btrfs_print_tree(root, next);
free_extent_buffer(next);
}
}
/*
* helper function for drop_snapshot, this walks down the tree dropping ref
* counts as it goes.
*/
static int walk_down_tree(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path, int *level)
{
struct btrfs_buffer *next;
struct btrfs_buffer *cur;
u64 blocknr;
int ret;
u32 refs;
ret = lookup_block_ref(trans, root, path->nodes[*level]->blocknr,
&refs);
BUG_ON(ret);
if (refs > 1)
goto out;
/*
* walk down to the last node level and free all the leaves
*/
while(*level > 0) {
cur = path->nodes[*level];
if (path->slots[*level] >=
btrfs_header_nritems(&cur->node.header))
break;
blocknr = btrfs_node_blockptr(&cur->node, path->slots[*level]);
ret = lookup_block_ref(trans, root, blocknr, &refs);
if (refs != 1 || *level == 1) {
path->slots[*level]++;
ret = btrfs_free_extent(trans, root, blocknr, 1, 1);
BUG_ON(ret);
continue;
}
BUG_ON(ret);
next = read_tree_block(root, blocknr);
if (path->nodes[*level-1])
btrfs_block_release(root, path->nodes[*level-1]);
path->nodes[*level-1] = next;
*level = btrfs_header_level(&next->node.header);
path->slots[*level] = 0;
}
out:
ret = btrfs_free_extent(trans, root, path->nodes[*level]->blocknr, 1,
1);
btrfs_block_release(root, path->nodes[*level]);
path->nodes[*level] = NULL;
*level += 1;
BUG_ON(ret);
return 0;
}
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct btrfs_buffer *buf)
{
u64 blocknr;
int i;
if (!root->ref_cows)
return 0;
if (btrfs_is_leaf(&buf->node))
return 0;
for (i = 0; i < btrfs_header_nritems(&buf->node.header); i++) {
blocknr = btrfs_node_blockptr(&buf->node, i);
inc_block_ref(trans, root, blocknr);
}
return 0;
}
void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int follow)
{
u32 i;
u32 nr;
u32 size;
struct btrfs_disk_key disk_key;
struct btrfs_key key;
struct extent_buffer *next;
if (!eb)
return;
nr = btrfs_header_nritems(eb);
if (btrfs_is_leaf(eb)) {
btrfs_print_leaf(root, eb);
return;
}
printf("node %llu level %d items %d free %u generation %llu owner %llu\n",
(unsigned long long)eb->start,
btrfs_header_level(eb), nr,
(u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
(unsigned long long)btrfs_header_generation(eb),
(unsigned long long)btrfs_header_owner(eb));
print_uuids(eb);
fflush(stdout);
size = root->nodesize;
for (i = 0; i < nr; i++) {
u64 blocknr = btrfs_node_blockptr(eb, i);
btrfs_node_key(eb, &disk_key, i);
btrfs_disk_key_to_cpu(&key, &disk_key);
printf("\t");
btrfs_print_key(&disk_key);
printf(" block %llu (%llu) gen %llu\n",
(unsigned long long)blocknr,
(unsigned long long)blocknr / size,
(unsigned long long)btrfs_node_ptr_generation(eb, i));
fflush(stdout);
}
if (!follow)
return;
for (i = 0; i < nr; i++) {
next = read_tree_block(root, btrfs_node_blockptr(eb, i), size,
btrfs_node_ptr_generation(eb, i));
if (!extent_buffer_uptodate(next)) {
fprintf(stderr, "failed to read %llu in tree %llu\n",
(unsigned long long)btrfs_node_blockptr(eb, i),
(unsigned long long)btrfs_header_owner(eb));
continue;
}
if (btrfs_is_leaf(next) && btrfs_header_level(eb) != 1) {
warning(
"eb corrupted: item %d eb level %d next level %d, skipping the rest",
i, btrfs_header_level(next),
btrfs_header_level(eb));
goto out;
}
if (btrfs_header_level(next) != btrfs_header_level(eb) - 1) {
warning(
"eb corrupted: item %d eb level %d next level %d, skipping the rest",
i, btrfs_header_level(next),
btrfs_header_level(eb));
goto out;
}
btrfs_print_tree(root, next, 1);
free_extent_buffer(next);
}
return;
out:
free_extent_buffer(next);
}
