The patch titled
Subject: iomap: use kiocb_write_and_wait and kiocb_invalidate_pages
has been added to the -mm mm-unstable branch. Its filename is
iomap-use-kiocb_write_and_wait-and-kiocb_invalidate_pages.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/iomap-use-kiocb_write_and_wait-and-kiocb_invalidate_pages.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Christoph Hellwig <hch@xxxxxx>
Subject: iomap: use kiocb_write_and_wait and kiocb_invalidate_pages
Date: Thu, 1 Jun 2023 16:59:00 +0200
Use the common helpers for direct I/O page invalidation instead of open
coding the logic. This leads to a slight reordering of checks in
__iomap_dio_rw to keep the logic straight.
Link: https://lkml.kernel.org/r/20230601145904.1385409-9-hch@xxxxxx
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
Cc: Anna Schumaker <anna@xxxxxxxxxx>
Cc: Chao Yu <chao@xxxxxxxxxx>
Cc: Christian Brauner <brauner@xxxxxxxxxx>
Cc: Ilya Dryomov <idryomov@xxxxxxxxx>
Cc: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Miklos Szeredi <miklos@xxxxxxxxxx>
Cc: Miklos Szeredi <mszeredi@xxxxxxxxxx>
Cc: Theodore Ts'o <tytso@xxxxxxx>
Cc: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Cc: Xiubo Li <xiubli@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/iomap/direct-io.c | 55 ++++++++++++++---------------------------
1 file changed, 20 insertions(+), 35 deletions(-)
--- a/fs/iomap/direct-io.c~iomap-use-kiocb_write_and_wait-and-kiocb_invalidate_pages
+++ a/fs/iomap/direct-io.c
@@ -472,7 +472,6 @@ __iomap_dio_rw(struct kiocb *iocb, struc
const struct iomap_ops *ops, const struct iomap_dio_ops *dops,
unsigned int dio_flags, void *private, size_t done_before)
{
- struct address_space *mapping = iocb->ki_filp->f_mapping;
struct inode *inode = file_inode(iocb->ki_filp);
struct iomap_iter iomi = {
.inode = inode,
@@ -481,11 +480,11 @@ __iomap_dio_rw(struct kiocb *iocb, struc
.flags = IOMAP_DIRECT,
.private = private,
};
- loff_t end = iomi.pos + iomi.len - 1, ret = 0;
bool wait_for_completion =
is_sync_kiocb(iocb) || (dio_flags & IOMAP_DIO_FORCE_WAIT);
struct blk_plug plug;
struct iomap_dio *dio;
+ loff_t ret = 0;
trace_iomap_dio_rw_begin(iocb, iter, dio_flags, done_before);
@@ -509,31 +508,29 @@ __iomap_dio_rw(struct kiocb *iocb, struc
dio->submit.waiter = current;
dio->submit.poll_bio = NULL;
+ if (iocb->ki_flags & IOCB_NOWAIT)
+ iomi.flags |= IOMAP_NOWAIT;
+
if (iov_iter_rw(iter) == READ) {
if (iomi.pos >= dio->i_size)
goto out_free_dio;
- if (iocb->ki_flags & IOCB_NOWAIT) {
- if (filemap_range_needs_writeback(mapping, iomi.pos,
- end)) {
- ret = -EAGAIN;
- goto out_free_dio;
- }
- iomi.flags |= IOMAP_NOWAIT;
- }
-
if (user_backed_iter(iter))
dio->flags |= IOMAP_DIO_DIRTY;
+
+ ret = kiocb_write_and_wait(iocb, iomi.len);
+ if (ret)
+ goto out_free_dio;
} else {
iomi.flags |= IOMAP_WRITE;
dio->flags |= IOMAP_DIO_WRITE;
- if (iocb->ki_flags & IOCB_NOWAIT) {
- if (filemap_range_has_page(mapping, iomi.pos, end)) {
- ret = -EAGAIN;
+ if (dio_flags & IOMAP_DIO_OVERWRITE_ONLY) {
+ ret = -EAGAIN;
+ if (iomi.pos >= dio->i_size ||
+ iomi.pos + iomi.len > dio->i_size)
goto out_free_dio;
- }
- iomi.flags |= IOMAP_NOWAIT;
+ iomi.flags |= IOMAP_OVERWRITE_ONLY;
}
/* for data sync or sync, we need sync completion processing */
@@ -549,31 +546,19 @@ __iomap_dio_rw(struct kiocb *iocb, struc
if (!(iocb->ki_flags & IOCB_SYNC))
dio->flags |= IOMAP_DIO_WRITE_FUA;
}
- }
-
- if (dio_flags & IOMAP_DIO_OVERWRITE_ONLY) {
- ret = -EAGAIN;
- if (iomi.pos >= dio->i_size ||
- iomi.pos + iomi.len > dio->i_size)
- goto out_free_dio;
- iomi.flags |= IOMAP_OVERWRITE_ONLY;
- }
-
- ret = filemap_write_and_wait_range(mapping, iomi.pos, end);
- if (ret)
- goto out_free_dio;
- if (iov_iter_rw(iter) == WRITE) {
/*
* Try to invalidate cache pages for the range we are writing.
* If this invalidation fails, let the caller fall back to
* buffered I/O.
*/
- if (invalidate_inode_pages2_range(mapping,
- iomi.pos >> PAGE_SHIFT, end >> PAGE_SHIFT)) {
- trace_iomap_dio_invalidate_fail(inode, iomi.pos,
- iomi.len);
- ret = -ENOTBLK;
+ ret = kiocb_invalidate_pages(iocb, iomi.len);
+ if (ret) {
+ if (ret != -EAGAIN) {
+ trace_iomap_dio_invalidate_fail(inode, iomi.pos,
+ iomi.len);
+ ret = -ENOTBLK;
+ }
goto out_free_dio;
}
_
Patches currently in -mm which might be from hch@xxxxxx are
backing_dev-remove-current-backing_dev_info.patch
iomap-update-ki_pos-a-little-later-in-iomap_dio_complete.patch
filemap-update-ki_pos-in-generic_perform_write.patch
filemap-add-a-kiocb_write_and_wait-helper.patch
filemap-add-a-kiocb_invalidate_pages-helper.patch
filemap-add-a-kiocb_invalidate_post_direct_write-helper.patch
iomap-update-ki_pos-in-iomap_file_buffered_write.patch
iomap-use-kiocb_write_and_wait-and-kiocb_invalidate_pages.patch
fs-factor-out-a-direct_write_fallback-helper.patch
fuse-update-ki_pos-in-fuse_perform_write.patch
fuse-drop-redundant-arguments-to-fuse_perform_write.patch
fuse-use-direct_write_fallback.patch
squashfs-dont-include-buffer_headh.patch
