#include <linux/buffer_head.h>
#include <linux/mm.h>
#include <linux/backing-dev.h>
+#include <linux/gfp.h>
#include "nilfs.h"
#include "mdt.h"
#include "dat.h"
}
int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
- sector_t pblocknr, struct buffer_head **pbh,
- int newblk)
+ sector_t pblocknr, struct buffer_head **pbh)
{
struct buffer_head *bh;
struct inode *inode = NILFS_BTNC_I(btnc);
return -ENOMEM;
err = -EEXIST; /* internal code */
- if (newblk) {
- if (unlikely(buffer_mapped(bh) || buffer_uptodate(bh) ||
- buffer_dirty(bh))) {
- brelse(bh);
- BUG();
- }
- memset(bh->b_data, 0, 1 << inode->i_blkbits);
- bh->b_bdev = NILFS_I_NILFS(inode)->ns_bdev;
- bh->b_blocknr = blocknr;
- set_buffer_mapped(bh);
- set_buffer_uptodate(bh);
- goto found;
- }
if (buffer_uptodate(bh) || buffer_dirty(bh))
goto found;
return err;
}
-int nilfs_btnode_get(struct address_space *btnc, __u64 blocknr,
- sector_t pblocknr, struct buffer_head **pbh, int newblk)
-{
- struct buffer_head *bh;
- int err;
-
- err = nilfs_btnode_submit_block(btnc, blocknr, pblocknr, pbh, newblk);
- if (err == -EEXIST) /* internal code (cache hit) */
- return 0;
- if (unlikely(err))
- return err;
-
- bh = *pbh;
- wait_on_buffer(bh);
- if (!buffer_uptodate(bh)) {
- brelse(bh);
- return -EIO;
- }
- return 0;
-}
-
/**
* nilfs_btnode_delete - delete B-tree node buffer
* @bh: buffer to be deleted