Btrfs: Create extent_buffer interface for large blocksizes
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index 49db5fa..6f19de4 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -33,7 +33,7 @@
int ret;
char *ptr;
struct btrfs_item *item;
- struct btrfs_leaf *leaf;
+ struct extent_buffer *leaf;
ret = btrfs_insert_empty_item(trans, root, path, cpu_key, data_size);
if (ret == -EEXIST) {
@@ -49,11 +49,11 @@
if (ret < 0)
return ERR_PTR(ret);
WARN_ON(ret > 0);
- leaf = btrfs_buffer_leaf(path->nodes[0]);
- item = leaf->items + path->slots[0];
+ leaf = path->nodes[0];
+ item = btrfs_item_nr(leaf, path->slots[0]);
ptr = btrfs_item_ptr(leaf, path->slots[0], char);
- BUG_ON(data_size > btrfs_item_size(item));
- ptr += btrfs_item_size(item) - data_size;
+ BUG_ON(data_size > btrfs_item_size(leaf, item));
+ ptr += btrfs_item_size(leaf, item) - data_size;
return (struct btrfs_dir_item *)ptr;
}
@@ -65,12 +65,13 @@
int ret2 = 0;
struct btrfs_path *path;
struct btrfs_dir_item *dir_item;
- char *name_ptr;
+ struct extent_buffer *leaf;
+ unsigned long name_ptr;
struct btrfs_key key;
+ struct btrfs_disk_key disk_key;
u32 data_size;
key.objectid = dir;
- key.flags = 0;
btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
ret = btrfs_name_hash(name, name_len, &key.offset);
BUG_ON(ret);
@@ -85,14 +86,16 @@
goto out;
}
- btrfs_cpu_key_to_disk(&dir_item->location, location);
- btrfs_set_dir_type(dir_item, type);
- btrfs_set_dir_flags(dir_item, 0);
- btrfs_set_dir_name_len(dir_item, name_len);
- name_ptr = (char *)(dir_item + 1);
+ leaf = path->nodes[0];
+ btrfs_cpu_key_to_disk(&disk_key, location);
+ btrfs_set_dir_item_key(leaf, dir_item, &disk_key);
+ btrfs_set_dir_type(leaf, dir_item, type);
+ btrfs_set_dir_flags(leaf, dir_item, 0);
+ btrfs_set_dir_name_len(leaf, dir_item, name_len);
+ name_ptr = (unsigned long)(dir_item + 1);
- btrfs_memcpy(root, path->nodes[0]->b_data, name_ptr, name, name_len);
- btrfs_mark_buffer_dirty(path->nodes[0]);
+ write_extent_buffer(leaf, name, name_ptr, name_len);
+ btrfs_mark_buffer_dirty(leaf);
second_insert:
/* FIXME, use some real flag for selecting the extra index */
@@ -110,13 +113,15 @@
ret2 = PTR_ERR(dir_item);
goto out;
}
- btrfs_cpu_key_to_disk(&dir_item->location, location);
- btrfs_set_dir_type(dir_item, type);
- btrfs_set_dir_flags(dir_item, 0);
- btrfs_set_dir_name_len(dir_item, name_len);
- name_ptr = (char *)(dir_item + 1);
- btrfs_memcpy(root, path->nodes[0]->b_data, name_ptr, name, name_len);
- btrfs_mark_buffer_dirty(path->nodes[0]);
+ leaf = path->nodes[0];
+ btrfs_cpu_key_to_disk(&disk_key, location);
+ btrfs_set_dir_item_key(leaf, dir_item, &disk_key);
+ btrfs_set_dir_type(leaf, dir_item, type);
+ btrfs_set_dir_flags(leaf, dir_item, 0);
+ btrfs_set_dir_name_len(leaf, dir_item, name_len);
+ name_ptr = (unsigned long)(dir_item + 1);
+ write_extent_buffer(leaf, name, name_ptr, name_len);
+ btrfs_mark_buffer_dirty(leaf);
out:
btrfs_free_path(path);
if (ret)
@@ -136,14 +141,15 @@
struct btrfs_key key;
int ins_len = mod < 0 ? -1 : 0;
int cow = mod != 0;
- struct btrfs_disk_key *found_key;
- struct btrfs_leaf *leaf;
+ struct btrfs_key found_key;
+ struct extent_buffer *leaf;
key.objectid = dir;
- key.flags = 0;
btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY);
+
ret = btrfs_name_hash(name, name_len, &key.offset);
BUG_ON(ret);
+
ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow);
if (ret < 0)
return ERR_PTR(ret);
@@ -152,12 +158,13 @@
return NULL;
path->slots[0]--;
}
- leaf = btrfs_buffer_leaf(path->nodes[0]);
- found_key = &leaf->items[path->slots[0]].key;
- if (btrfs_disk_key_objectid(found_key) != dir ||
- btrfs_disk_key_type(found_key) != BTRFS_DIR_ITEM_KEY ||
- btrfs_disk_key_offset(found_key) != key.offset)
+ leaf = path->nodes[0];
+ btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
+
+ if (found_key.objectid != dir ||
+ btrfs_key_type(&found_key) != BTRFS_DIR_ITEM_KEY ||
+ found_key.offset != key.offset)
return NULL;
return btrfs_match_dir_item_name(root, path, name, name_len);
@@ -176,7 +183,6 @@
int cow = mod != 0;
key.objectid = dir;
- key.flags = 0;
btrfs_set_key_type(&key, BTRFS_DIR_INDEX_KEY);
key.offset = objectid;
@@ -193,21 +199,22 @@
const char *name, int name_len)
{
struct btrfs_dir_item *dir_item;
- char *name_ptr;
+ unsigned long name_ptr;
u32 total_len;
u32 cur = 0;
u32 this_len;
- struct btrfs_leaf *leaf;
+ struct extent_buffer *leaf;
- leaf = btrfs_buffer_leaf(path->nodes[0]);
+ leaf = path->nodes[0];
dir_item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_dir_item);
- total_len = btrfs_item_size(leaf->items + path->slots[0]);
+ total_len = btrfs_item_size_nr(leaf, path->slots[0]);
while(cur < total_len) {
- this_len = sizeof(*dir_item) + btrfs_dir_name_len(dir_item);
- name_ptr = (char *)(dir_item + 1);
+ this_len = sizeof(*dir_item) +
+ btrfs_dir_name_len(leaf, dir_item);
+ name_ptr = (unsigned long)(dir_item + 1);
- if (btrfs_dir_name_len(dir_item) == name_len &&
- memcmp(name_ptr, name, name_len) == 0)
+ if (btrfs_dir_name_len(leaf, dir_item) == name_len &&
+ memcmp_extent_buffer(leaf, name, name_ptr, name_len) == 0)
return dir_item;
cur += this_len;
@@ -223,20 +230,23 @@
struct btrfs_dir_item *di)
{
- struct btrfs_leaf *leaf;
+ struct extent_buffer *leaf;
u32 sub_item_len;
u32 item_len;
int ret = 0;
- leaf = btrfs_buffer_leaf(path->nodes[0]);
- sub_item_len = sizeof(*di) + btrfs_dir_name_len(di);
- item_len = btrfs_item_size(leaf->items + path->slots[0]);
- if (sub_item_len == btrfs_item_size(leaf->items + path->slots[0])) {
+ leaf = path->nodes[0];
+ sub_item_len = sizeof(*di) + btrfs_dir_name_len(leaf, di);
+ item_len = btrfs_item_size_nr(leaf, path->slots[0]);
+ if (sub_item_len == item_len) {
ret = btrfs_del_item(trans, root, path);
} else {
- char *ptr = (char *)di;
- char *start = btrfs_item_ptr(leaf, path->slots[0], char);
- btrfs_memmove(root, leaf, ptr, ptr + sub_item_len,
+ /* MARKER */
+ unsigned long ptr = (unsigned long)di;
+ unsigned long start;
+
+ start = btrfs_item_ptr_offset(leaf, path->slots[0]);
+ memmove_extent_buffer(leaf, ptr, ptr + sub_item_len,
item_len - (ptr + sub_item_len - start));
ret = btrfs_truncate_item(trans, root, path,
item_len - sub_item_len);