Btrfs: Create extent_buffer interface for large blocksizes
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 4cc459c..1734ca6 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -16,7 +16,6 @@
* Boston, MA 021110-1307, USA.
*/
-#include <linux/buffer_head.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
#include <linux/highmem.h>
@@ -88,7 +87,9 @@
{
struct btrfs_key key;
struct btrfs_path *path;
- char *ptr, *kaddr;
+ struct extent_buffer *leaf;
+ char *kaddr;
+ unsigned long ptr;
struct btrfs_file_extent_item *ei;
u32 datasize;
int err = 0;
@@ -102,7 +103,6 @@
key.objectid = inode->i_ino;
key.offset = offset;
- key.flags = 0;
btrfs_set_key_type(&key, BTRFS_EXTENT_DATA_KEY);
BUG_ON(size >= PAGE_CACHE_SIZE);
datasize = btrfs_file_extent_calc_inline_size(size);
@@ -113,18 +113,17 @@
err = ret;
goto fail;
}
- ei = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
- path->slots[0], struct btrfs_file_extent_item);
- btrfs_set_file_extent_generation(ei, trans->transid);
- btrfs_set_file_extent_type(ei,
- BTRFS_FILE_EXTENT_INLINE);
+ leaf = path->nodes[0];
+ ei = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+ btrfs_set_file_extent_generation(leaf, ei, trans->transid);
+ btrfs_set_file_extent_type(leaf, ei, BTRFS_FILE_EXTENT_INLINE);
ptr = btrfs_file_extent_inline_start(ei);
kaddr = kmap_atomic(page, KM_USER0);
- btrfs_memcpy(root, path->nodes[0]->b_data,
- ptr, kaddr + page_offset, size);
+ write_extent_buffer(leaf, kaddr + page_offset, ptr, size);
kunmap_atomic(kaddr, KM_USER0);
- btrfs_mark_buffer_dirty(path->nodes[0]);
+ btrfs_mark_buffer_dirty(leaf);
fail:
btrfs_free_path(path);
return err;
@@ -156,8 +155,8 @@
em->bdev = inode->i_sb->s_bdev;
- start_pos = pos & ~((u64)root->blocksize - 1);
- num_blocks = (write_bytes + pos - start_pos + root->blocksize - 1) >>
+ start_pos = pos & ~((u64)root->sectorsize - 1);
+ num_blocks = (write_bytes + pos - start_pos + root->sectorsize - 1) >>
inode->i_blkbits;
down_read(&BTRFS_I(inode)->root->snap_sem);
@@ -184,7 +183,7 @@
if (inode->i_size < start_pos) {
u64 last_pos_in_file;
u64 hole_size;
- u64 mask = root->blocksize - 1;
+ u64 mask = root->sectorsize - 1;
last_pos_in_file = (isize + mask) & ~mask;
hole_size = (start_pos - last_pos_in_file + mask) & ~mask;
@@ -227,8 +226,8 @@
/* step one, delete the existing extents in this range */
/* FIXME blocksize != pagesize */
err = btrfs_drop_extents(trans, root, inode, start_pos,
- (pos + write_bytes + root->blocksize -1) &
- ~((u64)root->blocksize - 1), &hint_block);
+ (pos + write_bytes + root->sectorsize -1) &
+ ~((u64)root->sectorsize - 1), &hint_block);
if (err)
goto failed;
@@ -288,7 +287,7 @@
{
int ret;
struct btrfs_key key;
- struct btrfs_leaf *leaf;
+ struct extent_buffer *leaf;
int slot;
struct btrfs_file_extent_item *extent;
u64 extent_end = 0;
@@ -327,10 +326,10 @@
found_extent = 0;
found_inline = 0;
extent = NULL;
- leaf = btrfs_buffer_leaf(path->nodes[0]);
+ leaf = path->nodes[0];
slot = path->slots[0];
ret = 0;
- btrfs_disk_key_to_cpu(&key, &leaf->items[slot].key);
+ btrfs_item_key_to_cpu(leaf, &key, slot);
if (key.offset >= end || key.objectid != inode->i_ino) {
goto out;
}
@@ -344,17 +343,18 @@
if (btrfs_key_type(&key) == BTRFS_EXTENT_DATA_KEY) {
extent = btrfs_item_ptr(leaf, slot,
struct btrfs_file_extent_item);
- found_type = btrfs_file_extent_type(extent);
+ found_type = btrfs_file_extent_type(leaf, extent);
if (found_type == BTRFS_FILE_EXTENT_REG) {
extent_end = key.offset +
- (btrfs_file_extent_num_blocks(extent) <<
+ (btrfs_file_extent_num_blocks(leaf, extent) <<
inode->i_blkbits);
found_extent = 1;
} else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
+ struct btrfs_item *item;
+ item = btrfs_item_nr(leaf, slot);
found_inline = 1;
extent_end = key.offset +
- btrfs_file_extent_inline_len(leaf->items +
- slot);
+ btrfs_file_extent_inline_len(leaf, item);
}
} else {
extent_end = search_start;
@@ -365,8 +365,7 @@
search_start >= extent_end) {
int nextret;
u32 nritems;
- nritems = btrfs_header_nritems(
- btrfs_buffer_header(path->nodes[0]));
+ nritems = btrfs_header_nritems(leaf);
if (slot >= nritems - 1) {
nextret = btrfs_next_leaf(root, path);
if (nextret)
@@ -380,7 +379,7 @@
/* FIXME, there's only one inline extent allowed right now */
if (found_inline) {
- u64 mask = root->blocksize - 1;
+ u64 mask = root->sectorsize - 1;
search_start = (extent_end + mask) & ~mask;
} else
search_start = extent_end;
@@ -388,10 +387,13 @@
if (end < extent_end && end >= key.offset) {
if (found_extent) {
u64 disk_blocknr =
- btrfs_file_extent_disk_blocknr(extent);
+ btrfs_file_extent_disk_blocknr(leaf,extent);
u64 disk_num_blocks =
- btrfs_file_extent_disk_num_blocks(extent);
- memcpy(&old, extent, sizeof(old));
+ btrfs_file_extent_disk_num_blocks(leaf,
+ extent);
+ read_extent_buffer(leaf, &old,
+ (unsigned long)extent,
+ sizeof(old));
if (disk_blocknr != 0) {
ret = btrfs_inc_extent_ref(trans, root,
disk_blocknr, disk_num_blocks);
@@ -406,20 +408,24 @@
u64 new_num;
u64 old_num;
keep = 1;
- WARN_ON(start & (root->blocksize - 1));
+ WARN_ON(start & (root->sectorsize - 1));
if (found_extent) {
new_num = (start - key.offset) >>
inode->i_blkbits;
- old_num = btrfs_file_extent_num_blocks(extent);
+ old_num = btrfs_file_extent_num_blocks(leaf,
+ extent);
*hint_block =
- btrfs_file_extent_disk_blocknr(extent);
- if (btrfs_file_extent_disk_blocknr(extent)) {
+ btrfs_file_extent_disk_blocknr(leaf,
+ extent);
+ if (btrfs_file_extent_disk_blocknr(leaf,
+ extent)) {
inode->i_blocks -=
(old_num - new_num) << 3;
}
- btrfs_set_file_extent_num_blocks(extent,
+ btrfs_set_file_extent_num_blocks(leaf,
+ extent,
new_num);
- btrfs_mark_buffer_dirty(path->nodes[0]);
+ btrfs_mark_buffer_dirty(leaf);
} else {
WARN_ON(1);
}
@@ -431,13 +437,17 @@
u64 extent_num_blocks = 0;
if (found_extent) {
disk_blocknr =
- btrfs_file_extent_disk_blocknr(extent);
+ btrfs_file_extent_disk_blocknr(leaf,
+ extent);
disk_num_blocks =
- btrfs_file_extent_disk_num_blocks(extent);
+ btrfs_file_extent_disk_num_blocks(leaf,
+ extent);
extent_num_blocks =
- btrfs_file_extent_num_blocks(extent);
+ btrfs_file_extent_num_blocks(leaf,
+ extent);
*hint_block =
- btrfs_file_extent_disk_blocknr(extent);
+ btrfs_file_extent_disk_blocknr(leaf,
+ extent);
}
ret = btrfs_del_item(trans, root, path);
/* TODO update progress marker and return */
@@ -464,42 +474,37 @@
struct btrfs_key ins;
ins.objectid = inode->i_ino;
ins.offset = end;
- ins.flags = 0;
btrfs_set_key_type(&ins, BTRFS_EXTENT_DATA_KEY);
btrfs_release_path(root, path);
ret = btrfs_insert_empty_item(trans, root, path, &ins,
sizeof(*extent));
+ leaf = path->nodes[0];
if (ret) {
- btrfs_print_leaf(root, btrfs_buffer_leaf(path->nodes[0]));
- printk("got %d on inserting %Lu %u %Lu start %Lu end %Lu found %Lu %Lu keep was %d\n", ret , ins.objectid, ins.flags, ins.offset, start, end, key.offset, extent_end, keep);
+ btrfs_print_leaf(root, leaf);
+ printk("got %d on inserting %Lu %u %Lu start %Lu end %Lu found %Lu %Lu keep was %d\n", ret , ins.objectid, ins.type, ins.offset, start, end, key.offset, extent_end, keep);
}
BUG_ON(ret);
- extent = btrfs_item_ptr(
- btrfs_buffer_leaf(path->nodes[0]),
- path->slots[0],
- struct btrfs_file_extent_item);
- btrfs_set_file_extent_disk_blocknr(extent,
- btrfs_file_extent_disk_blocknr(&old));
- btrfs_set_file_extent_disk_num_blocks(extent,
- btrfs_file_extent_disk_num_blocks(&old));
+ extent = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+ write_extent_buffer(leaf, &old,
+ (unsigned long)extent, sizeof(old));
- btrfs_set_file_extent_offset(extent,
- btrfs_file_extent_offset(&old) +
+ btrfs_set_file_extent_offset(leaf, extent,
+ le64_to_cpu(old.offset) +
((end - key.offset) >> inode->i_blkbits));
- WARN_ON(btrfs_file_extent_num_blocks(&old) <
+ WARN_ON(le64_to_cpu(old.num_blocks) <
(extent_end - end) >> inode->i_blkbits);
- btrfs_set_file_extent_num_blocks(extent,
+ btrfs_set_file_extent_num_blocks(leaf, extent,
(extent_end - end) >> inode->i_blkbits);
- btrfs_set_file_extent_type(extent,
+ btrfs_set_file_extent_type(leaf, extent,
BTRFS_FILE_EXTENT_REG);
- btrfs_set_file_extent_generation(extent,
- btrfs_file_extent_generation(&old));
btrfs_mark_buffer_dirty(path->nodes[0]);
- if (btrfs_file_extent_disk_blocknr(&old) != 0) {
+ if (le64_to_cpu(old.disk_blocknr) != 0) {
inode->i_blocks +=
- btrfs_file_extent_num_blocks(extent) << 3;
+ btrfs_file_extent_num_blocks(leaf,
+ extent) << 3;
}
ret = 0;
goto out;
@@ -529,8 +534,8 @@
u64 num_blocks;
u64 start_pos;
- start_pos = pos & ~((u64)root->blocksize - 1);
- num_blocks = (write_bytes + pos - start_pos + root->blocksize - 1) >>
+ start_pos = pos & ~((u64)root->sectorsize - 1);
+ num_blocks = (write_bytes + pos - start_pos + root->sectorsize - 1) >>
inode->i_blkbits;
memset(pages, 0, num_pages * sizeof(struct page *));
