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Btrfs: Pass down the expected generation number when reading tree blocks

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2008-05-12 12:59:19 -04:00
parent 188de649c5
commit ca7a79ad8d
6 changed files with 55 additions and 64 deletions
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30
fs/btrfs/disk-io.c
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@ -207,7 +207,7 @@ static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
static int btree_read_extent_buffer_pages(struct btrfs_root *root,
struct extent_buffer *eb,
u64 start)
u64 start, u64 parent_transid)
{
struct extent_io_tree *io_tree;
int ret;
@ -254,7 +254,8 @@ int csum_dirty_buffer(struct btrfs_root *root, struct page *page)
WARN_ON(1);
}
eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS);
ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE);
ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE,
btrfs_header_generation(eb));
BUG_ON(ret);
btrfs_clear_buffer_defrag(eb);
found_start = btrfs_header_bytenr(eb);
@ -562,7 +563,8 @@ static struct address_space_operations btree_aops = {
.sync_page = block_sync_page,
};
int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize)
int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
u64 parent_transid)
{
struct extent_buffer *buf = NULL;
struct inode *btree_inode = root->fs_info->btree_inode;
@ -592,12 +594,6 @@ static int close_all_devices(struct btrfs_fs_info *fs_info)
return 0;
}
int btrfs_verify_block_csum(struct btrfs_root *root,
struct extent_buffer *buf)
{
return btrfs_buffer_uptodate(buf);
}
struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
u64 bytenr, u32 blocksize)
{
@ -621,7 +617,7 @@ struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
u32 blocksize)
u32 blocksize, u64 parent_transid)
{
struct extent_buffer *buf = NULL;
struct inode *btree_inode = root->fs_info->btree_inode;
@ -634,7 +630,7 @@ struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
if (!buf)
return NULL;
ret = btree_read_extent_buffer_pages(root, buf, 0);
ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid);
if (ret == 0) {
buf->flags |= EXTENT_UPTODATE;
@ -715,7 +711,7 @@ static int find_and_setup_root(struct btrfs_root *tree_root,
blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
blocksize);
blocksize, 0);
BUG_ON(!root->node);
return 0;
}
@ -771,7 +767,7 @@ out:
}
blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
blocksize);
blocksize, 0);
BUG_ON(!root->node);
insert:
root->ref_cows = 1;
@ -1288,7 +1284,7 @@ struct btrfs_root *open_ctree(struct super_block *sb,
chunk_root->node = read_tree_block(chunk_root,
btrfs_super_chunk_root(disk_super),
blocksize);
blocksize, 0);
BUG_ON(!chunk_root->node);
read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid,
@ -1304,7 +1300,7 @@ struct btrfs_root *open_ctree(struct super_block *sb,
tree_root->node = read_tree_block(tree_root,
btrfs_super_root(disk_super),
blocksize);
blocksize, 0);
if (!tree_root->node)
goto fail_sb_buffer;
@ -1732,11 +1728,11 @@ int btrfs_clear_buffer_defrag(struct extent_buffer *buf)
EXTENT_DEFRAG, GFP_NOFS);
}
int btrfs_read_buffer(struct extent_buffer *buf)
int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid)
{
struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root;
int ret;
ret = btree_read_extent_buffer_pages(root, buf, 0);
ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid);
if (ret == 0) {
buf->flags |= EXTENT_UPTODATE;
}