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Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Chris Mason
authored and
David Woodhouse
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Mar 26, 2007
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,9 +1,57 @@ | ||
| #include <linux/module.h> | ||
| #include "ctree.h" | ||
| #include "disk-io.h" | ||
| #include "transaction.h" | ||
|
|
||
| int btrfs_create_file(struct btrfs_trans_handle *trans, | ||
| struct btrfs_root *root, u64 dirid, u64 *objectid) | ||
| int btrfs_alloc_file_extent(struct btrfs_trans_handle *trans, | ||
| struct btrfs_root *root, | ||
| u64 objectid, u64 offset, | ||
| u64 num_blocks, u64 hint_block, | ||
| u64 *result) | ||
| { | ||
| struct btrfs_key ins; | ||
| int ret = 0; | ||
| struct btrfs_file_extent_item *item; | ||
| struct btrfs_key file_key; | ||
| struct btrfs_path path; | ||
|
|
||
| btrfs_init_path(&path); | ||
| ret = btrfs_alloc_extent(trans, root, num_blocks, hint_block, | ||
| (u64)-1, objectid, &ins); | ||
| BUG_ON(ret); | ||
| file_key.objectid = objectid; | ||
| file_key.offset = offset; | ||
| file_key.flags = 0; | ||
| btrfs_set_key_type(&file_key, BTRFS_EXTENT_DATA_KEY); | ||
|
|
||
| ret = btrfs_insert_empty_item(trans, root, &path, &file_key, | ||
| sizeof(*item)); | ||
| item = btrfs_item_ptr(btrfs_buffer_leaf(path.nodes[0]), path.slots[0], | ||
| struct btrfs_file_extent_item); | ||
| btrfs_set_file_extent_disk_blocknr(item, ins.objectid); | ||
| btrfs_set_file_extent_disk_num_blocks(item, ins.offset); | ||
| btrfs_set_file_extent_offset(item, 0); | ||
| btrfs_set_file_extent_num_blocks(item, ins.offset); | ||
| mark_buffer_dirty(path.nodes[0]); | ||
| *result = ins.objectid; | ||
| btrfs_release_path(root, &path); | ||
| return 0; | ||
| } | ||
|
|
||
| int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, | ||
| struct btrfs_root *root, | ||
| struct btrfs_path *path, u64 objectid, | ||
| u64 blocknr, u64 num_blocks, int mod) | ||
| { | ||
| int ret; | ||
| struct btrfs_key file_key; | ||
| int ins_len = mod < 0 ? -1 : 0; | ||
| int cow = mod != 0; | ||
|
|
||
| file_key.objectid = objectid; | ||
| file_key.offset = blocknr; | ||
| file_key.flags = 0; | ||
| btrfs_set_key_type(&file_key, BTRFS_EXTENT_DATA_KEY); | ||
| ret = btrfs_search_slot(trans, root, &file_key, path, ins_len, cow); | ||
| return ret; | ||
| } |
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