From: Christoph Hellwig <hch@lst.de>
To: cluster-devel.redhat.com
Subject: [Cluster-devel] [PATCH 8/8] iomap: use kiocb_write_and_wait and kiocb_invalidate_pages
Date: Wed, 31 May 2023 09:20:06 +0200 [thread overview]
Message-ID: <20230531072006.476386-9-hch@lst.de> (raw)
In-Reply-To: <20230531072006.476386-1-hch@lst.de>
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.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
---
fs/iomap/direct-io.c | 55 ++++++++++++++++----------------------------
1 file changed, 20 insertions(+), 35 deletions(-)
diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c
index 0795c54a745bca..6bd14691f96e07 100644
--- a/fs/iomap/direct-io.c
+++ b/fs/iomap/direct-io.c
@@ -472,7 +472,6 @@ __iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
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, struct iov_iter *iter,
.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, struct iov_iter *iter,
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, struct iov_iter *iter,
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;
}
--
2.39.2
prev parent reply other threads:[~2023-05-31 7:20 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-31 7:19 [Cluster-devel] cleanup the filemap / direct I/O interaction v3 Christoph Hellwig
2023-05-31 7:19 ` [Cluster-devel] [PATCH 1/8] backing_dev: remove current->backing_dev_info Christoph Hellwig
2023-05-31 7:20 ` [Cluster-devel] [PATCH 2/8] iomap: update ki_pos a little later in iomap_dio_complete Christoph Hellwig
2023-05-31 7:20 ` [Cluster-devel] [PATCH 3/8] filemap: update ki_pos in generic_perform_write Christoph Hellwig
2023-05-31 7:20 ` [Cluster-devel] [PATCH 4/8] filemap: add a kiocb_write_and_wait helper Christoph Hellwig
2023-05-31 7:20 ` [Cluster-devel] [PATCH 5/8] filemap: add a kiocb_invalidate_pages helper Christoph Hellwig
2023-05-31 7:20 ` [Cluster-devel] [PATCH 6/8] filemap: add a kiocb_invalidate_post_direct_write helper Christoph Hellwig
2023-05-31 7:20 ` [Cluster-devel] [PATCH 7/8] iomap: update ki_pos in iomap_file_buffered_write Christoph Hellwig
2023-05-31 7:20 ` Christoph Hellwig [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20230531072006.476386-9-hch@lst.de \
--to=hch@lst.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).