52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
#include <linux/module.h>
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#include "ctree.h"
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#include "disk-io.h"
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#include "transaction.h"
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int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
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*root, u64 objectid, struct btrfs_inode_item
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*inode_item)
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{
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struct btrfs_path *path;
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struct btrfs_key key;
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int ret;
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key.objectid = objectid;
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key.flags = 0;
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btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
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key.offset = 0;
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path = btrfs_alloc_path();
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BUG_ON(!path);
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btrfs_init_path(path);
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ret = btrfs_insert_item(trans, root, &key, inode_item,
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sizeof(*inode_item));
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btrfs_release_path(root, path);
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btrfs_free_path(path);
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return ret;
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}
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int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
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*root, struct btrfs_path *path,
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struct btrfs_key *location, int mod)
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{
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int ins_len = mod < 0 ? -1 : 0;
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int cow = mod != 0;
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int ret;
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int slot;
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struct btrfs_leaf *leaf;
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struct btrfs_key found_key;
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ret = btrfs_search_slot(trans, root, location, path, ins_len, cow);
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if (ret > 0 && btrfs_key_type(location) == BTRFS_ROOT_ITEM_KEY &&
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location->offset == (u64)-1 && path->slots[0] != 0) {
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slot = path->slots[0] - 1;
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leaf = btrfs_buffer_leaf(path->nodes[0]);
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btrfs_disk_key_to_cpu(&found_key, &leaf->items[slot].key);
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if (found_key.objectid == location->objectid &&
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btrfs_key_type(&found_key) == btrfs_key_type(location)) {
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path->slots[0]--;
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return 0;
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}
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}
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return ret;
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}
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