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generations on headers

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This commit is contained in:
Chris Mason 2007-03-26 11:24:42 -04:00 committed by David Woodhouse
parent 9fb549a6c1
commit 132db51b1f
5 changed files with 26 additions and 4 deletions
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12
ctree.h
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@ -45,6 +45,7 @@ struct btrfs_key {
struct btrfs_header { struct btrfs_header {
u8 fsid[16]; /* FS specific uuid */ u8 fsid[16]; /* FS specific uuid */
__le64 blocknr; /* which block this node is supposed to live in */ __le64 blocknr; /* which block this node is supposed to live in */
__le64 generation;
__le64 parentid; /* objectid of the tree root */ __le64 parentid; /* objectid of the tree root */
__le32 csum; __le32 csum;
__le32 ham; __le32 ham;
@ -572,6 +573,17 @@ static inline void btrfs_set_header_blocknr(struct btrfs_header *h, u64 blocknr)
h->blocknr = cpu_to_le64(blocknr); h->blocknr = cpu_to_le64(blocknr);
} }
static inline u64 btrfs_header_generation(struct btrfs_header *h)
{
return le64_to_cpu(h->generation);
}
static inline void btrfs_set_header_generation(struct btrfs_header *h,
u64 val)
{
h->generation = cpu_to_le64(val);
}
static inline u64 btrfs_header_parentid(struct btrfs_header *h) static inline u64 btrfs_header_parentid(struct btrfs_header *h)
{ {
return le64_to_cpu(h->parentid); return le64_to_cpu(h->parentid);

2
extent-tree.c
View File

@ -459,6 +459,8 @@ struct btrfs_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
} }
buf = find_tree_block(root, ins.objectid); buf = find_tree_block(root, ins.objectid);
dirty_tree_block(trans, root, buf); dirty_tree_block(trans, root, buf);
btrfs_set_header_generation(&buf->node.header,
root->root_key.offset + 1);
return buf; return buf;
} }

2
hasher.c
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@ -15,6 +15,8 @@ int main() {
break; break;
if (strlen(line) == 0) if (strlen(line) == 0)
continue; continue;
if (line[strlen(line)-1] == '\n')
line[strlen(line)-1] = '\0';
ret = btrfs_name_hash(line, strlen(line), &result); ret = btrfs_name_hash(line, strlen(line), &result);
BUG_ON(ret); BUG_ON(ret);
printf("hash returns %Lu\n", result); printf("hash returns %Lu\n", result);

1
mkfs.c
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@ -114,6 +114,7 @@ int mkfs(int fd, u64 num_blocks, u32 blocksize)
BTRFS_ROOT_TREE_OBJECTID); BTRFS_ROOT_TREE_OBJECTID);
btrfs_set_header_blocknr(&empty_leaf->header, start_block + 1); btrfs_set_header_blocknr(&empty_leaf->header, start_block + 1);
btrfs_set_header_nritems(&empty_leaf->header, 3); btrfs_set_header_nritems(&empty_leaf->header, 3);
btrfs_set_header_generation(&empty_leaf->header, 0);
/* create the items for the root tree */ /* create the items for the root tree */
btrfs_set_root_blocknr(&root_item, start_block + 2); btrfs_set_root_blocknr(&root_item, start_block + 2);

13
print-tree.c
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@ -17,9 +17,11 @@ void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l)
struct btrfs_inode_item *ii; struct btrfs_inode_item *ii;
u32 type; u32 type;
printf("leaf %Lu total ptrs %d free space %d\n", printf("leaf %Lu ptrs %d free space %d parent %Lu generation %Lu\n",
btrfs_header_blocknr(&l->header), nr, btrfs_header_blocknr(&l->header), nr,
btrfs_leaf_free_space(root, l)); btrfs_leaf_free_space(root, l),
btrfs_header_parentid(&l->header),
btrfs_header_generation(&l->header));
fflush(stdout); fflush(stdout);
for (i = 0 ; i < nr ; i++) { for (i = 0 ; i < nr ; i++) {
item = l->items + i; item = l->items + i;
@ -87,9 +89,12 @@ void btrfs_print_tree(struct btrfs_root *root, struct btrfs_buffer *t)
btrfs_print_leaf(root, (struct btrfs_leaf *)c); btrfs_print_leaf(root, (struct btrfs_leaf *)c);
return; return;
} }
printf("node %Lu level %d total ptrs %d free spc %u\n", t->blocknr, printf("node %Lu level %d ptrs %d free %u parent %Lu generation %Lu\n",
t->blocknr,
btrfs_header_level(&c->header), nr, btrfs_header_level(&c->header), nr,
(u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr); (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
btrfs_header_parentid(&c->header),
btrfs_header_generation(&c->header));
fflush(stdout); fflush(stdout);
for (i = 0; i < nr; i++) { for (i = 0; i < nr; i++) {
printf("\tkey %d (%Lu %u %Lu) block %Lu\n", printf("\tkey %d (%Lu %u %Lu) block %Lu\n",