[PATCH 03/12] filemap: update ki_pos in generic_perform_write
From: Christoph Hellwig <hch@lst.de>
Date: 2023-05-31 07:50:56
Also in:
ceph-devel, linux-ext4, linux-f2fs-devel, linux-fsdevel, linux-mm, linux-nfs, linux-xfs
Subsystem:
ceph distributed file system client (ceph), ext4 file system, f2fs file system, filesystems (vfs and infrastructure), memory management, nfs, sunrpc, and lockd clients, page cache, the rest · Maintainers:
Ilya Dryomov, Alex Markuze, Viacheslav Dubeyko, "Theodore Ts'o", Jaegeuk Kim, Chao Yu, Alexander Viro, Christian Brauner, Andrew Morton, Trond Myklebust, Anna Schumaker, Matthew Wilcox, Jan Kara, Linus Torvalds
All callers of generic_perform_write need to updated ki_pos, move it into common code. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Xiubo Li <redacted> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Hannes Reinecke <hare@suse.de> Acked-by: Darrick J. Wong <djwong@kernel.org> --- fs/ceph/file.c | 2 -- fs/ext4/file.c | 9 +++------ fs/f2fs/file.c | 1 - fs/nfs/file.c | 1 - mm/filemap.c | 8 ++++---- 5 files changed, 7 insertions(+), 14 deletions(-)
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index c8ef72f723badd..767f4dfe7def64 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c@@ -1891,8 +1891,6 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) * can not run at the same time */ written = generic_perform_write(iocb, from); - if (likely(written >= 0)) - iocb->ki_pos = pos + written; ceph_end_io_write(inode); }
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index bc430270c23c19..ea0ada3985cba2 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c@@ -289,12 +289,9 @@ static ssize_t ext4_buffered_write_iter(struct kiocb *iocb, out: inode_unlock(inode); - if (likely(ret > 0)) { - iocb->ki_pos += ret; - ret = generic_write_sync(iocb, ret); - } - - return ret; + if (unlikely(ret <= 0)) + return ret; + return generic_write_sync(iocb, ret); } static ssize_t ext4_handle_inode_extension(struct inode *inode, loff_t offset,
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 4f423d367a44b9..7134fe8bd008cb 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c@@ -4520,7 +4520,6 @@ static ssize_t f2fs_buffered_write_iter(struct kiocb *iocb, ret = generic_perform_write(iocb, from); if (ret > 0) { - iocb->ki_pos += ret; f2fs_update_iostat(F2FS_I_SB(inode), inode, APP_BUFFERED_IO, ret); }
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 665ce3fc62eaf4..e8bb4c48a3210a 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c@@ -655,7 +655,6 @@ ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from) goto out; written = result; - iocb->ki_pos += written; nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written); if (mntflags & NFS_MOUNT_WRITE_EAGER) {
diff --git a/mm/filemap.c b/mm/filemap.c
index 33b54660ad2b39..15907af4a57ff5 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c@@ -3957,7 +3957,10 @@ ssize_t generic_perform_write(struct kiocb *iocb, struct iov_iter *i) balance_dirty_pages_ratelimited(mapping); } while (iov_iter_count(i)); - return written ? written : status; + if (!written) + return status; + iocb->ki_pos += written; + return written; } EXPORT_SYMBOL(generic_perform_write);
@@ -4034,7 +4037,6 @@ ssize_t __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from) endbyte = pos + status - 1; err = filemap_write_and_wait_range(mapping, pos, endbyte); if (err == 0) { - iocb->ki_pos = endbyte + 1; written += status; invalidate_mapping_pages(mapping, pos >> PAGE_SHIFT,
@@ -4047,8 +4049,6 @@ ssize_t __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from) } } else { written = generic_perform_write(iocb, from); - if (likely(written > 0)) - iocb->ki_pos += written; } out: return written ? written : err;
--
2.39.2