github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-24 15:12:13 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

dax: advance the iomap_iter in the read/write path

Browse Source 
DAX reads and writes flow through dax_iomap_iter(), which has one or
more subtleties in terms of how it processes a range vs. what is
specified in the iomap_iter. To keep things simple and remove the
dependency on iomap_iter() advances, convert a positive return from
dax_iomap_iter() to the new advance and status return semantics. The
advance can be pushed further down in future patches.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Link: https://lore.kernel.org/r/20250224144757.237706-5-bfoster@redhat.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Brian Foster 2025-02-24 09:47:49 -05:00 committed by Christian Brauner
parent f145377da1
commit e1e6bae607
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
fs/dax.c
View File

@ -1585,8 +1585,12 @@ dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
if (iocb->ki_flags & IOCB_NOWAIT)
iomi.flags |= IOMAP_NOWAIT;
while ((ret = iomap_iter(&iomi, ops)) > 0)
while ((ret = iomap_iter(&iomi, ops)) > 0) {
iomi.processed = dax_iomap_iter(&iomi, iter);
if (iomi.processed > 0)
iomi.processed = iomap_iter_advance(&iomi,
&iomi.processed);
}
done = iomi.pos - iocb->ki_pos;
iocb->ki_pos = iomi.pos;