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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/btrfs/inode-item.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/fs/btrfs/inode-item.c')
-rw-r--r--ANDROID_3.4.5/fs/btrfs/inode-item.c236
1 files changed, 0 insertions, 236 deletions
diff --git a/ANDROID_3.4.5/fs/btrfs/inode-item.c b/ANDROID_3.4.5/fs/btrfs/inode-item.c
deleted file mode 100644
index a13cf1a9..00000000
--- a/ANDROID_3.4.5/fs/btrfs/inode-item.c
+++ /dev/null
@@ -1,236 +0,0 @@
-/*
- * Copyright (C) 2007 Oracle. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License v2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- */
-
-#include "ctree.h"
-#include "disk-io.h"
-#include "transaction.h"
-#include "print-tree.h"
-
-static int find_name_in_backref(struct btrfs_path *path, const char *name,
- int name_len, struct btrfs_inode_ref **ref_ret)
-{
- struct extent_buffer *leaf;
- struct btrfs_inode_ref *ref;
- unsigned long ptr;
- unsigned long name_ptr;
- u32 item_size;
- u32 cur_offset = 0;
- int len;
-
- leaf = path->nodes[0];
- item_size = btrfs_item_size_nr(leaf, path->slots[0]);
- ptr = btrfs_item_ptr_offset(leaf, path->slots[0]);
- while (cur_offset < item_size) {
- ref = (struct btrfs_inode_ref *)(ptr + cur_offset);
- len = btrfs_inode_ref_name_len(leaf, ref);
- name_ptr = (unsigned long)(ref + 1);
- cur_offset += len + sizeof(*ref);
- if (len != name_len)
- continue;
- if (memcmp_extent_buffer(leaf, name, name_ptr, name_len) == 0) {
- *ref_ret = ref;
- return 1;
- }
- }
- return 0;
-}
-
-struct btrfs_inode_ref *
-btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
- struct btrfs_path *path,
- const char *name, int name_len,
- u64 inode_objectid, u64 ref_objectid, int mod)
-{
- struct btrfs_key key;
- struct btrfs_inode_ref *ref;
- int ins_len = mod < 0 ? -1 : 0;
- int cow = mod != 0;
- int ret;
-
- key.objectid = inode_objectid;
- key.type = BTRFS_INODE_REF_KEY;
- key.offset = ref_objectid;
-
- ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow);
- if (ret < 0)
- return ERR_PTR(ret);
- if (ret > 0)
- return NULL;
- if (!find_name_in_backref(path, name, name_len, &ref))
- return NULL;
- return ref;
-}
-
-int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
- const char *name, int name_len,
- u64 inode_objectid, u64 ref_objectid, u64 *index)
-{
- struct btrfs_path *path;
- struct btrfs_key key;
- struct btrfs_inode_ref *ref;
- struct extent_buffer *leaf;
- unsigned long ptr;
- unsigned long item_start;
- u32 item_size;
- u32 sub_item_len;
- int ret;
- int del_len = name_len + sizeof(*ref);
-
- key.objectid = inode_objectid;
- key.offset = ref_objectid;
- btrfs_set_key_type(&key, BTRFS_INODE_REF_KEY);
-
- path = btrfs_alloc_path();
- if (!path)
- return -ENOMEM;
-
- path->leave_spinning = 1;
-
- ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
- if (ret > 0) {
- ret = -ENOENT;
- goto out;
- } else if (ret < 0) {
- goto out;
- }
- if (!find_name_in_backref(path, name, name_len, &ref)) {
- ret = -ENOENT;
- goto out;
- }
- leaf = path->nodes[0];
- item_size = btrfs_item_size_nr(leaf, path->slots[0]);
-
- if (index)
- *index = btrfs_inode_ref_index(leaf, ref);
-
- if (del_len == item_size) {
- ret = btrfs_del_item(trans, root, path);
- goto out;
- }
- ptr = (unsigned long)ref;
- sub_item_len = name_len + sizeof(*ref);
- item_start = btrfs_item_ptr_offset(leaf, path->slots[0]);
- memmove_extent_buffer(leaf, ptr, ptr + sub_item_len,
- item_size - (ptr + sub_item_len - item_start));
- btrfs_truncate_item(trans, root, path,
- item_size - sub_item_len, 1);
-out:
- btrfs_free_path(path);
- return ret;
-}
-
-/* Will return 0, -ENOMEM, -EMLINK, or -EEXIST or anything from the CoW path */
-int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
- const char *name, int name_len,
- u64 inode_objectid, u64 ref_objectid, u64 index)
-{
- struct btrfs_path *path;
- struct btrfs_key key;
- struct btrfs_inode_ref *ref;
- unsigned long ptr;
- int ret;
- int ins_len = name_len + sizeof(*ref);
-
- key.objectid = inode_objectid;
- key.offset = ref_objectid;
- btrfs_set_key_type(&key, BTRFS_INODE_REF_KEY);
-
- path = btrfs_alloc_path();
- if (!path)
- return -ENOMEM;
-
- path->leave_spinning = 1;
- ret = btrfs_insert_empty_item(trans, root, path, &key,
- ins_len);
- if (ret == -EEXIST) {
- u32 old_size;
-
- if (find_name_in_backref(path, name, name_len, &ref))
- goto out;
-
- old_size = btrfs_item_size_nr(path->nodes[0], path->slots[0]);
- btrfs_extend_item(trans, root, path, ins_len);
- ref = btrfs_item_ptr(path->nodes[0], path->slots[0],
- struct btrfs_inode_ref);
- ref = (struct btrfs_inode_ref *)((unsigned long)ref + old_size);
- btrfs_set_inode_ref_name_len(path->nodes[0], ref, name_len);
- btrfs_set_inode_ref_index(path->nodes[0], ref, index);
- ptr = (unsigned long)(ref + 1);
- ret = 0;
- } else if (ret < 0) {
- if (ret == -EOVERFLOW)
- ret = -EMLINK;
- goto out;
- } else {
- ref = btrfs_item_ptr(path->nodes[0], path->slots[0],
- struct btrfs_inode_ref);
- btrfs_set_inode_ref_name_len(path->nodes[0], ref, name_len);
- btrfs_set_inode_ref_index(path->nodes[0], ref, index);
- ptr = (unsigned long)(ref + 1);
- }
- write_extent_buffer(path->nodes[0], name, ptr, name_len);
- btrfs_mark_buffer_dirty(path->nodes[0]);
-
-out:
- btrfs_free_path(path);
- return ret;
-}
-
-int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
- struct btrfs_path *path, u64 objectid)
-{
- struct btrfs_key key;
- int ret;
- key.objectid = objectid;
- btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY);
- key.offset = 0;
-
- ret = btrfs_insert_empty_item(trans, root, path, &key,
- sizeof(struct btrfs_inode_item));
- return ret;
-}
-
-int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
- *root, struct btrfs_path *path,
- struct btrfs_key *location, int mod)
-{
- int ins_len = mod < 0 ? -1 : 0;
- int cow = mod != 0;
- int ret;
- int slot;
- struct extent_buffer *leaf;
- struct btrfs_key found_key;
-
- ret = btrfs_search_slot(trans, root, location, path, ins_len, cow);
- if (ret > 0 && btrfs_key_type(location) == BTRFS_ROOT_ITEM_KEY &&
- location->offset == (u64)-1 && path->slots[0] != 0) {
- slot = path->slots[0] - 1;
- leaf = path->nodes[0];
- btrfs_item_key_to_cpu(leaf, &found_key, slot);
- if (found_key.objectid == location->objectid &&
- btrfs_key_type(&found_key) == btrfs_key_type(location)) {
- path->slots[0]--;
- return 0;
- }
- }
- return ret;
-}