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btrfs: rename btrfs_leaf_data to BTRFS_LEAF_DATA_OFFSET 

Commit 5f39d397df ("Btrfs: Create extent_buffer interface
for large blocksizes") refactored btrfs_leaf_data function to take
extent_buffer rather than struct btrfs_leaf. However, as it turns out the
parameter being passed is never used. Furthermore this function no longer
returns the leaf data but rather the offset to it. So rename the function
to BTRFS_LEAF_DATA_OFFSET to make it consistent with other BTRFS_LEAF_*
helpers and turn it into a macro.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
[ removed () from the macro ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2017-05-29 09:43:43 +03:00 committed by David Sterba
parent e1ddce71d6
commit 3d9ec8c49a
3 changed files with 25 additions and 27 deletions
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40
fs/btrfs/ctree.c
View File

@ -3667,14 +3667,14 @@ static noinline int __push_leaf_right(struct btrfs_fs_info *fs_info,
/* make room in the right data area */ /* make room in the right data area */
data_end = leaf_data_end(fs_info, right); data_end = leaf_data_end(fs_info, right);
memmove_extent_buffer(right, memmove_extent_buffer(right,
btrfs_leaf_data(right) + data_end - push_space, BTRFS_LEAF_DATA_OFFSET + data_end - push_space,
btrfs_leaf_data(right) + data_end, BTRFS_LEAF_DATA_OFFSET + data_end,
BTRFS_LEAF_DATA_SIZE(fs_info) - data_end); BTRFS_LEAF_DATA_SIZE(fs_info) - data_end);
/* copy from the left data area */ /* copy from the left data area */
copy_extent_buffer(right, left, btrfs_leaf_data(right) + copy_extent_buffer(right, left, BTRFS_LEAF_DATA_OFFSET +
BTRFS_LEAF_DATA_SIZE(fs_info) - push_space, BTRFS_LEAF_DATA_SIZE(fs_info) - push_space,
btrfs_leaf_data(left) + leaf_data_end(fs_info, left), BTRFS_LEAF_DATA_OFFSET + leaf_data_end(fs_info, left),
push_space); push_space);
memmove_extent_buffer(right, btrfs_item_nr_offset(push_items), memmove_extent_buffer(right, btrfs_item_nr_offset(push_items),
@ -3888,9 +3888,9 @@ static noinline int __push_leaf_left(struct btrfs_fs_info *fs_info,
push_space = BTRFS_LEAF_DATA_SIZE(fs_info) - push_space = BTRFS_LEAF_DATA_SIZE(fs_info) -
btrfs_item_offset_nr(right, push_items - 1); btrfs_item_offset_nr(right, push_items - 1);
copy_extent_buffer(left, right, btrfs_leaf_data(left) + copy_extent_buffer(left, right, BTRFS_LEAF_DATA_OFFSET +
leaf_data_end(fs_info, left) - push_space, leaf_data_end(fs_info, left) - push_space,
btrfs_leaf_data(right) + BTRFS_LEAF_DATA_OFFSET +
btrfs_item_offset_nr(right, push_items - 1), btrfs_item_offset_nr(right, push_items - 1),
push_space); push_space);
old_left_nritems = btrfs_header_nritems(left); old_left_nritems = btrfs_header_nritems(left);
@ -3917,9 +3917,9 @@ static noinline int __push_leaf_left(struct btrfs_fs_info *fs_info,
if (push_items < right_nritems) { if (push_items < right_nritems) {
push_space = btrfs_item_offset_nr(right, push_items - 1) - push_space = btrfs_item_offset_nr(right, push_items - 1) -
leaf_data_end(fs_info, right); leaf_data_end(fs_info, right);
memmove_extent_buffer(right, btrfs_leaf_data(right) + memmove_extent_buffer(right, BTRFS_LEAF_DATA_OFFSET +
BTRFS_LEAF_DATA_SIZE(fs_info) - push_space, BTRFS_LEAF_DATA_SIZE(fs_info) - push_space,
btrfs_leaf_data(right) + BTRFS_LEAF_DATA_OFFSET +
leaf_data_end(fs_info, right), push_space); leaf_data_end(fs_info, right), push_space);
memmove_extent_buffer(right, btrfs_item_nr_offset(0), memmove_extent_buffer(right, btrfs_item_nr_offset(0),
@ -4069,8 +4069,8 @@ static noinline void copy_for_split(struct btrfs_trans_handle *trans,
nritems * sizeof(struct btrfs_item)); nritems * sizeof(struct btrfs_item));
copy_extent_buffer(right, l, copy_extent_buffer(right, l,
btrfs_leaf_data(right) + BTRFS_LEAF_DATA_SIZE(fs_info) - BTRFS_LEAF_DATA_OFFSET + BTRFS_LEAF_DATA_SIZE(fs_info) -
data_copy_size, btrfs_leaf_data(l) + data_copy_size, BTRFS_LEAF_DATA_OFFSET +
leaf_data_end(fs_info, l), data_copy_size); leaf_data_end(fs_info, l), data_copy_size);
rt_data_off = BTRFS_LEAF_DATA_SIZE(fs_info) - btrfs_item_end_nr(l, mid); rt_data_off = BTRFS_LEAF_DATA_SIZE(fs_info) - btrfs_item_end_nr(l, mid);
@ -4607,8 +4607,8 @@ void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
/* shift the data */ /* shift the data */
if (from_end) { if (from_end) {
memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) + memmove_extent_buffer(leaf, BTRFS_LEAF_DATA_OFFSET +
data_end + size_diff, btrfs_leaf_data(leaf) + data_end + size_diff, BTRFS_LEAF_DATA_OFFSET +
data_end, old_data_start + new_size - data_end); data_end, old_data_start + new_size - data_end);
} else { } else {
struct btrfs_disk_key disk_key; struct btrfs_disk_key disk_key;
@ -4634,8 +4634,8 @@ void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
} }
} }
memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) + memmove_extent_buffer(leaf, BTRFS_LEAF_DATA_OFFSET +
data_end + size_diff, btrfs_leaf_data(leaf) + data_end + size_diff, BTRFS_LEAF_DATA_OFFSET +
data_end, old_data_start - data_end); data_end, old_data_start - data_end);
offset = btrfs_disk_key_offset(&disk_key); offset = btrfs_disk_key_offset(&disk_key);
@ -4707,8 +4707,8 @@ void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
} }
/* shift the data */ /* shift the data */
memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) + memmove_extent_buffer(leaf, BTRFS_LEAF_DATA_OFFSET +
data_end - data_size, btrfs_leaf_data(leaf) + data_end - data_size, BTRFS_LEAF_DATA_OFFSET +
data_end, old_data - data_end); data_end, old_data - data_end);
data_end = old_data; data_end = old_data;
@ -4790,8 +4790,8 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
(nritems - slot) * sizeof(struct btrfs_item)); (nritems - slot) * sizeof(struct btrfs_item));
/* shift the data */ /* shift the data */
memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) + memmove_extent_buffer(leaf, BTRFS_LEAF_DATA_OFFSET +
data_end - total_data, btrfs_leaf_data(leaf) + data_end - total_data, BTRFS_LEAF_DATA_OFFSET +
data_end, old_data - data_end); data_end, old_data - data_end);
data_end = old_data; data_end = old_data;
} }
@ -4983,9 +4983,9 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
if (slot + nr != nritems) { if (slot + nr != nritems) {
int data_end = leaf_data_end(fs_info, leaf); int data_end = leaf_data_end(fs_info, leaf);
memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) + memmove_extent_buffer(leaf, BTRFS_LEAF_DATA_OFFSET +
data_end + dsize, data_end + dsize,
btrfs_leaf_data(leaf) + data_end, BTRFS_LEAF_DATA_OFFSET + data_end,
last_off - data_end); last_off - data_end);
for (i = slot + nr; i < nritems; i++) { for (i = slot + nr; i < nritems; i++) {

10
fs/btrfs/ctree.h
View File

@ -1293,6 +1293,8 @@ static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
return __BTRFS_LEAF_DATA_SIZE(info->nodesize); return __BTRFS_LEAF_DATA_SIZE(info->nodesize);
} }
#define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items)
static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
{ {
return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
@ -2325,10 +2327,6 @@ static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
return btrfs_csum_sizes[t]; return btrfs_csum_sizes[t];
} }
static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
{
return offsetof(struct btrfs_leaf, items);
}
/* /*
* The leaf data grows from end-to-front in the node. * The leaf data grows from end-to-front in the node.
@ -2539,11 +2537,11 @@ BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
/* helper function to cast into the data area of the leaf. */ /* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \ #define btrfs_item_ptr(leaf, slot, type) \
((type *)(btrfs_leaf_data(leaf) + \ ((type *)(BTRFS_LEAF_DATA_OFFSET + \
btrfs_item_offset_nr(leaf, slot))) btrfs_item_offset_nr(leaf, slot)))
#define btrfs_item_ptr_offset(leaf, slot) \ #define btrfs_item_ptr_offset(leaf, slot) \
((unsigned long)(btrfs_leaf_data(leaf) + \ ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \
btrfs_item_offset_nr(leaf, slot))) btrfs_item_offset_nr(leaf, slot)))
static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)

2
fs/btrfs/extent_io.c
View File

@ -3757,7 +3757,7 @@ static noinline_for_stack int write_one_eb(struct extent_buffer *eb,
* header 0 1 2 .. N ... data_N .. data_2 data_1 data_0 * header 0 1 2 .. N ... data_N .. data_2 data_1 data_0
*/ */
start = btrfs_item_nr_offset(nritems); start = btrfs_item_nr_offset(nritems);
end = btrfs_leaf_data(eb) + leaf_data_end(fs_info, eb); end = BTRFS_LEAF_DATA_OFFSET + leaf_data_end(fs_info, eb);
memzero_extent_buffer(eb, start, end - start); memzero_extent_buffer(eb, start, end - start);
} }