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Btrfs: patch queue: fix corruption when splitting large items 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-05-11 11:33:21 -04:00 committed by David Woodhouse
parent 509659cde5
commit 098f59c251
2 changed files with 12 additions and 6 deletions
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10
fs/btrfs/ctree.c
View File

@ -871,6 +871,7 @@ static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_set_node_blockptr(lower, slot, blocknr);
btrfs_set_header_nritems(&lower->header, nritems + 1);
btrfs_mark_buffer_dirty(path->nodes[level]);
check_node(root, path, level);
return 0;
}
@ -1101,6 +1102,8 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
} else {
btrfs_block_release(root, right_buf);
}
if (path->nodes[1])
check_node(root, path, 1);
return 0;
}
/*
@ -1216,6 +1219,7 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_mark_buffer_dirty(t);
btrfs_mark_buffer_dirty(right_buf);
wret = fixup_low_keys(trans, root, path, &right->items[0].key, 1);
if (wret)
ret = wret;
@ -1231,6 +1235,8 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
path->slots[0] -= push_items;
}
BUG_ON(path->slots[0] < 0);
if (path->nodes[1])
check_node(root, path, 1);
return ret;
}
@ -1326,13 +1332,12 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
wret = insert_ptr(trans, root, path,
&disk_key,
bh_blocknr(right_buffer),
path->slots[1] - 1, 1);
path->slots[1], 1);
if (wret)
ret = wret;
btrfs_block_release(root, path->nodes[0]);
path->nodes[0] = right_buffer;
path->slots[0] = 0;
path->slots[1] -= 1;
if (path->slots[1] == 0) {
wret = fixup_low_keys(trans, root,
path, &disk_key, 1);
@ -1379,6 +1384,7 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root
} else
btrfs_block_release(root, right_buffer);
BUG_ON(path->slots[0] < 0);
check_node(root, path, 1);
if (!double_split)
return ret;

8
fs/btrfs/super.c
View File

@ -1529,7 +1529,8 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans,
btrfs_set_file_extent_type(ei,
BTRFS_FILE_EXTENT_INLINE);
ptr = btrfs_file_extent_inline_start(ei);
memcpy(ptr, bh->b_data, offset + write_bytes);
btrfs_memcpy(root, path->nodes[0]->b_data,
ptr, bh->b_data, offset + write_bytes);
mark_buffer_dirty(path->nodes[0]);
btrfs_free_path(path);
} else {
@ -1686,9 +1687,9 @@ static int drop_extents(struct btrfs_trans_handle *trans,
ret = btrfs_del_item(trans, root, path);
BUG_ON(ret);
btrfs_release_path(root, path);
extent = NULL;
if (found_extent) {
inode->i_blocks -=
btrfs_file_extent_num_blocks(extent) << 3;
inode->i_blocks -= extent_num_blocks << 3;
ret = btrfs_free_extent(trans, root,
disk_blocknr,
disk_num_blocks, 0);
@ -1832,7 +1833,6 @@ static ssize_t btrfs_file_write(struct file *file, const char __user *buf,
u64 alloc_extent_start;
struct btrfs_trans_handle *trans;
struct btrfs_key ins;
pinned[0] = NULL;
pinned[1] = NULL;
if (file->f_flags & O_DIRECT)