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xfs: remove xfs_file_wait_for_io 

filemap_write_and_wait_range operates on full pages, so there is no
need for the rounding operations.  Additionally this allows us to
micro-optimize by skipping the second inode_dio_wait for a
intra-file clone.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Christoph Hellwig 2016-10-20 15:49:55 +11:00 committed by Dave Chinner
parent 576177818e
commit ec40759902
1 changed files with 10 additions and 29 deletions
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39
fs/xfs/xfs_file.c
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@ -909,32 +909,6 @@ out_unlock:
return error;
}
/*
* Flush all file writes out to disk.
*/
static int
xfs_file_wait_for_io(
struct inode *inode,
loff_t offset,
size_t len)
{
loff_t rounding;
loff_t ioffset;
loff_t iendoffset;
loff_t bs;
int ret;
bs = inode->i_sb->s_blocksize;
inode_dio_wait(inode);
rounding = max_t(xfs_off_t, bs, PAGE_SIZE);
ioffset = round_down(offset, rounding);
iendoffset = round_up(offset + len, rounding) - 1;
ret = filemap_write_and_wait_range(inode->i_mapping, ioffset,
iendoffset);
return ret;
}
/* Hook up to the VFS reflink function */
STATIC int
xfs_file_share_range(
@ -1031,11 +1005,18 @@ xfs_file_share_range(
if (same_inode && pos_out + blen > pos_in && pos_out < pos_in + blen)
goto out_unlock;
/* Wait for the completion of any pending IOs on srcfile */
ret = xfs_file_wait_for_io(inode_in, pos_in, len);
/* Wait for the completion of any pending IOs on both files */
inode_dio_wait(inode_in);
if (!same_inode)
inode_dio_wait(inode_out);
ret = filemap_write_and_wait_range(inode_in->i_mapping,
pos_in, pos_in + len - 1);
if (ret)
goto out_unlock;
ret = xfs_file_wait_for_io(inode_out, pos_out, len);
ret = filemap_write_and_wait_range(inode_out->i_mapping,
pos_out, pos_out + len - 1);
if (ret)
goto out_unlock;