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xfs: use new extent lookup helpers xfs_file_iomap_begin_delay 

And only lookup the previous extent inside xfs_iomap_prealloc_size
if we actually need it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Christoph Hellwig 2016-11-24 11:39:44 +11:00 committed by Dave Chinner
parent 65c5f41978
commit 656152e552
1 changed files with 9 additions and 11 deletions
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20
fs/xfs/xfs_iomap.c
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@ -395,11 +395,12 @@ xfs_iomap_prealloc_size(
struct xfs_inode *ip,
loff_t offset,
loff_t count,
xfs_extnum_t idx,
struct xfs_bmbt_irec *prev)
xfs_extnum_t idx)
{
struct xfs_mount *mp = ip->i_mount;
struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
xfs_fileoff_t offset_fsb = XFS_B_TO_FSBT(mp, offset);
struct xfs_bmbt_irec prev;
int shift = 0;
int64_t freesp;
xfs_fsblock_t qblocks;
@ -419,8 +420,8 @@ xfs_iomap_prealloc_size(
*/
if ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ||
XFS_ISIZE(ip) < XFS_FSB_TO_B(mp, mp->m_dalign) ||
idx == 0 ||
prev->br_startoff + prev->br_blockcount < offset_fsb)
!xfs_iext_get_extent(ifp, idx - 1, &prev) ||
prev.br_startoff + prev.br_blockcount < offset_fsb)
return mp->m_writeio_blocks;
/*
@ -439,8 +440,8 @@ xfs_iomap_prealloc_size(
* always extends to MAXEXTLEN rather than falling short due to things
* like stripe unit/width alignment of real extents.
*/
if (prev->br_blockcount <= (MAXEXTLEN >> 1))
alloc_blocks = prev->br_blockcount << 1;
if (prev.br_blockcount <= (MAXEXTLEN >> 1))
alloc_blocks = prev.br_blockcount << 1;
else
alloc_blocks = XFS_B_TO_FSB(mp, offset);
if (!alloc_blocks)
@ -538,7 +539,6 @@ xfs_file_iomap_begin_delay(
xfs_fileoff_t end_fsb, orig_end_fsb;
int error = 0, eof = 0;
struct xfs_bmbt_irec got;
struct xfs_bmbt_irec prev;
xfs_extnum_t idx;
ASSERT(!XFS_IS_REALTIME_INODE(ip));
@ -563,8 +563,7 @@ xfs_file_iomap_begin_delay(
goto out_unlock;
}
xfs_bmap_search_extents(ip, offset_fsb, XFS_DATA_FORK, &eof, &idx,
&got, &prev);
eof = !xfs_iext_lookup_extent(ip, ifp, offset_fsb, &idx, &got);
if (!eof && got.br_startoff <= offset_fsb) {
if (xfs_is_reflink_inode(ip)) {
bool shared;
@ -601,8 +600,7 @@ xfs_file_iomap_begin_delay(
if (eof) {
xfs_fsblock_t prealloc_blocks;
prealloc_blocks =
xfs_iomap_prealloc_size(ip, offset, count, idx, &prev);
prealloc_blocks = xfs_iomap_prealloc_size(ip, offset, count, idx);
if (prealloc_blocks) {
xfs_extlen_t align;
xfs_off_t end_offset;