[PATCH 08/19] xfs: indicate if xfs_bmap_adjacent changed ap->blkno

Christoph Hellwig
2023-12-14T06:35:04Z

Add a return value to xfs_bmap_adjacent to indicate if it did change
ap->blkno or not.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/xfs/libxfs/xfs_bmap.c | 19 ++++++++++++++-----
fs/xfs/xfs_bmap_util.h | 2 +-
2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index 6722205949ad4c..46a9b22a3733e3 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -3044,7 +3044,8 @@ xfs_bmap_extsize_align(

#define XFS_ALLOC_GAP_UNITS 4

-void
+/* returns true if ap->blkno was modified */
+bool
xfs_bmap_adjacent(
struct xfs_bmalloca *ap) /* bmap alloc argument struct */
{
@@ -3079,13 +3080,14 @@ xfs_bmap_adjacent(
if (adjust &&
ISVALID(ap->blkno + adjust, ap->prev.br_startblock))
ap->blkno += adjust;
+ return true;
}
/*
* If not at eof, then compare the two neighbor blocks.
* Figure out whether either one gives us a good starting point,
* and pick the better one.
*/
- else if (!ap->eof) {
+ if (!ap->eof) {
xfs_fsblock_t gotbno; /* right side block number */
xfs_fsblock_t gotdiff=0; /* right side difference */
xfs_fsblock_t prevbno; /* left side block number */
@@ -3165,14 +3167,21 @@ xfs_bmap_adjacent(
* If both valid, pick the better one, else the only good
* one, else ap->blkno is already set (to 0 or the inode block).
*/
- if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK)
+ if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK) {
ap->blkno = prevdiff <= gotdiff ? prevbno : gotbno;
- else if (prevbno != NULLFSBLOCK)
+ return true;
+ }
+ if (prevbno != NULLFSBLOCK) {
ap->blkno = prevbno;
- else if (gotbno != NULLFSBLOCK)
+ return true;
+ }
+ if (gotbno != NULLFSBLOCK) {
ap->blkno = gotbno;
+ return true;
+ }
}
#undef ISVALID
+ return false;
}

int
diff --git a/fs/xfs/xfs_bmap_util.h b/fs/xfs/xfs_bmap_util.h
index 6888078f5c31e0..77ecbb753ef207 100644
--- a/fs/xfs/xfs_bmap_util.h
+++ b/fs/xfs/xfs_bmap_util.h
@@ -47,7 +47,7 @@ int xfs_bmap_extsize_align(struct xfs_mount *mp, struct xfs_bmbt_irec *gotp,
struct xfs_bmbt_irec *prevp, xfs_extlen_t extsz,
int rt, int eof, int delay, int convert,
xfs_fileoff_t *offp, xfs_extlen_t *lenp);
-void xfs_bmap_adjacent(struct xfs_bmalloca *ap);
+bool xfs_bmap_adjacent(struct xfs_bmalloca *ap);
int xfs_bmap_last_extent(struct xfs_trans *tp, struct xfs_inode *ip,
int whichfork, struct xfs_bmbt_irec *rec,
int *is_empty);
--
2.39.2