[PATCH 13/32] xfs: introduce XFS_BLI_PREALLOC

[Christoph Hellwig <hch@lst.de>]

Source kernel commit: 4d5a534c06d09083d7b70801a11201ff0b5bacd2

Add a flag so that the shadow CIL buffer for a buffer log item is always
sizes to the maximum to prevent reallocations.  This will be used for the
RT checksum item, where we know that we are going to fill it up very soon,
and (almost) sequentially, so there is no point in doing a constant
realloc cycle when more data is added to it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 libxfs/xfs_trans_resv.c | 2 +-
 libxfs/xfs_trans_resv.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/libxfs/xfs_trans_resv.c b/libxfs/xfs_trans_resv.c
index 5b7660b1cd8a..3a9de562ac2b 100644
--- a/libxfs/xfs_trans_resv.c
+++ b/libxfs/xfs_trans_resv.c
@@ -46,7 +46,7 @@ xfs_buf_log_overhead(void)
  * will be changed in a transaction.  size is used to tell how many
  * bytes should be reserved per item.
  */
-STATIC uint
+uint
 xfs_calc_buf_res(
 	uint		nbufs,
 	uint		size)
diff --git a/libxfs/xfs_trans_resv.h b/libxfs/xfs_trans_resv.h
index 336279e0fc61..1804e821f382 100644
--- a/libxfs/xfs_trans_resv.h
+++ b/libxfs/xfs_trans_resv.h
@@ -96,6 +96,7 @@ struct xfs_trans_resv {
 #define	XFS_ITRUNCATE_LOG_COUNT_REFLINK	8
 #define	XFS_WRITE_LOG_COUNT_REFLINK	8
 
+uint xfs_calc_buf_res(uint nbufs, uint size);
 void xfs_trans_resv_calc(struct xfs_mount *mp, struct xfs_trans_resv *resp);
 uint xfs_allocfree_block_count(struct xfs_mount *mp, uint num_ops);
 
-- 
2.53.0