From: Goldwyn Rodrigues <rgoldwyn@suse.de>
To: linux-btrfs@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, hch@infradead.org,
darrick.wong@oracle.com, fdmanana@kernel.org,
Goldwyn Rodrigues <rgoldwyn@suse.com>
Subject: [PATCH 2/5] iomap: add a filesystem hook for direct I/O bio submission
Date: Mon, 25 Nov 2019 21:14:53 -0600 [thread overview]
Message-ID: <20191126031456.12150-3-rgoldwyn@suse.de> (raw)
In-Reply-To: <20191126031456.12150-1-rgoldwyn@suse.de>
From: Goldwyn Rodrigues <rgoldwyn@suse.com>
This helps filesystems to perform tasks on the bio while submitting for
I/O. This could be post-write operations such as data CRC or data
replication for fs-handled RAID.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
---
fs/iomap/direct-io.c | 14 +++++++++-----
include/linux/iomap.h | 2 ++
2 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c
index b77ec2acb066..2dac380f88a0 100644
--- a/fs/iomap/direct-io.c
+++ b/fs/iomap/direct-io.c
@@ -59,7 +59,7 @@ int iomap_dio_iopoll(struct kiocb *kiocb, bool spin)
EXPORT_SYMBOL_GPL(iomap_dio_iopoll);
static void iomap_dio_submit_bio(struct iomap_dio *dio, struct iomap *iomap,
- struct bio *bio)
+ struct bio *bio, loff_t pos)
{
atomic_inc(&dio->ref);
@@ -67,7 +67,11 @@ static void iomap_dio_submit_bio(struct iomap_dio *dio, struct iomap *iomap,
bio_set_polled(bio, dio->iocb);
dio->submit.last_queue = bdev_get_queue(iomap->bdev);
- dio->submit.cookie = submit_bio(bio);
+ if (dio->dops && dio->dops->submit_io)
+ dio->submit.cookie = dio->dops->submit_io(bio,
+ dio->iocb->ki_filp, pos);
+ else
+ dio->submit.cookie = submit_bio(bio);
}
static ssize_t iomap_dio_complete(struct iomap_dio *dio)
@@ -191,7 +195,7 @@ iomap_dio_zero(struct iomap_dio *dio, struct iomap *iomap, loff_t pos,
get_page(page);
__bio_add_page(bio, page, len, 0);
bio_set_op_attrs(bio, REQ_OP_WRITE, flags);
- iomap_dio_submit_bio(dio, iomap, bio);
+ iomap_dio_submit_bio(dio, iomap, bio, pos);
}
static loff_t
@@ -297,11 +301,11 @@ iomap_dio_bio_actor(struct inode *inode, loff_t pos, loff_t length,
iov_iter_advance(dio->submit.iter, n);
dio->size += n;
- pos += n;
copied += n;
nr_pages = iov_iter_npages(&iter, BIO_MAX_PAGES);
- iomap_dio_submit_bio(dio, iomap, bio);
+ iomap_dio_submit_bio(dio, iomap, bio, pos);
+ pos += n;
} while (nr_pages);
/*
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index 8b09463dae0d..2b093a23ef1c 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -252,6 +252,8 @@ int iomap_writepages(struct address_space *mapping,
struct iomap_dio_ops {
int (*end_io)(struct kiocb *iocb, ssize_t size, int error,
unsigned flags);
+ blk_qc_t (*submit_io)(struct bio *bio, struct file *file,
+ loff_t file_offset);
};
ssize_t iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
--
2.16.4
next prev parent reply other threads:[~2019-11-26 3:15 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-26 3:14 [PATCH 0/5 v2] btrfs direct-io using iomap Goldwyn Rodrigues
2019-11-26 3:14 ` [PATCH 1/5] fs: Export generic_file_buffered_read() Goldwyn Rodrigues
2019-11-26 3:43 ` Matthew Wilcox
2019-11-26 10:10 ` Johannes Thumshirn
2019-11-26 10:43 ` Johannes Thumshirn
2019-11-26 3:14 ` Goldwyn Rodrigues [this message]
2019-11-26 10:53 ` [PATCH 2/5] iomap: add a filesystem hook for direct I/O bio submission Nikolay Borisov
2019-11-26 11:51 ` Johannes Thumshirn
2019-11-26 3:14 ` [PATCH 3/5] btrfs: Switch to iomap_dio_rw() for dio Goldwyn Rodrigues
2019-11-26 11:54 ` Nikolay Borisov
2019-11-26 12:13 ` Nikolay Borisov
2019-11-26 3:14 ` [PATCH 4/5] btrfs: Wait for extent bits to release page Goldwyn Rodrigues
2019-11-26 12:38 ` Nikolay Borisov
2019-11-26 12:42 ` Johannes Thumshirn
2019-11-26 3:14 ` [PATCH 5/5] fs: Remove dio_end_io() Goldwyn Rodrigues
2019-11-26 12:39 ` Nikolay Borisov
2019-11-26 12:50 ` Johannes Thumshirn
2019-11-27 15:51 ` [PATCH 0/5 v2] btrfs direct-io using iomap David Sterba
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