struct btrfs_inode_item *inode_item;
struct extent_buffer *leaf;
struct btrfs_root *new_root;
- struct dentry *parent = dget_parent(dentry);
+ struct dentry *parent = dentry->d_parent;
struct inode *dir;
int ret;
int err;
u64 index = 0;
ret = btrfs_find_free_objectid(root->fs_info->tree_root, &objectid);
- if (ret) {
- dput(parent);
+ if (ret)
return ret;
- }
dir = parent->d_inode;
* 2 - dir items
*/
trans = btrfs_start_transaction(root, 6);
- if (IS_ERR(trans)) {
- dput(parent);
+ if (IS_ERR(trans))
return PTR_ERR(trans);
- }
leaf = btrfs_alloc_free_block(trans, root, root->leafsize,
0, objectid, NULL, 0, 0, 0);
d_instantiate(dentry, btrfs_lookup_dentry(dir, dentry));
fail:
- dput(parent);
if (async_transid) {
*async_transid = trans->transid;
err = btrfs_commit_transaction_async(trans, root, 1);
bool readonly)
{
struct inode *inode;
- struct dentry *parent;
struct btrfs_pending_snapshot *pending_snapshot;
struct btrfs_trans_handle *trans;
int ret;
if (ret)
goto fail;
- parent = dget_parent(dentry);
- inode = btrfs_lookup_dentry(parent->d_inode, dentry);
- dput(parent);
+ inode = btrfs_lookup_dentry(dentry->d_parent->d_inode, dentry);
if (IS_ERR(inode)) {
ret = PTR_ERR(inode);
goto fail;
if (!(src_file->f_mode & FMODE_READ))
goto out_fput;
+ /* don't make the dst file partly checksummed */
+ if ((BTRFS_I(src)->flags & BTRFS_INODE_NODATASUM) !=
+ (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM))
+ goto out_fput;
+
ret = -EISDIR;
if (S_ISDIR(src->i_mode) || S_ISDIR(inode->i_mode))
goto out_fput;
!IS_ALIGNED(destoff, bs))
goto out_unlock;
+ if (destoff > inode->i_size) {
+ ret = btrfs_cont_expand(inode, inode->i_size, destoff);
+ if (ret)
+ goto out_unlock;
+ }
+
+ /* truncate page cache pages from target inode range */
+ truncate_inode_pages_range(&inode->i_data, destoff,
+ PAGE_CACHE_ALIGN(destoff + len) - 1);
+
/* do any pending delalloc/csum calc on src, one way or
another, and lock file content */
while (1) {
btrfs_wait_ordered_range(src, off, len);
}
- /* truncate page cache pages from target inode range */
- truncate_inode_pages_range(&inode->i_data, off,
- ALIGN(off + len, PAGE_CACHE_SIZE) - 1);
-
/* clone data */
key.objectid = btrfs_ino(src);
key.type = BTRFS_EXTENT_DATA_KEY;
if (type == BTRFS_FILE_EXTENT_REG ||
type == BTRFS_FILE_EXTENT_PREALLOC) {
+ /*
+ * a | --- range to clone ---| b
+ * | ------------- extent ------------- |
+ */
+
+ /* substract range b */
+ if (key.offset + datal > off + len)
+ datal = off + len - key.offset;
+
+ /* substract range a */
if (off > key.offset) {
datao += off - key.offset;
datal -= off - key.offset;
}
- if (key.offset + datal > off + len)
- datal = off + len - key.offset;
-
ret = btrfs_drop_extents(trans, inode,
new_key.offset,
new_key.offset + datal,
if (endoff > inode->i_size)
btrfs_i_size_write(inode, endoff);
- BTRFS_I(inode)->flags = BTRFS_I(src)->flags;
ret = btrfs_update_inode(trans, root, inode);
BUG_ON(ret);
btrfs_end_transaction(trans, root);