filemap: update ki_pos in generic_perform_write

All callers of generic_perform_write need to updated ki_pos, move it into
common code.

Link: https://lkml.kernel.org/r/20230601145904.1385409-4-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Theodore Ts'o <tytso@mit.edu>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Anna Schumaker <anna@kernel.org>
Cc: Chao Yu <chao@kernel.org>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Ilya Dryomov <idryomov@gmail.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index c8ef72f..767f4df 100644 (file)
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -1891,8 +1891,6 @@ retry_snap:
                 * 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 bc43027..ea0ada3 100644 (file)
--- 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 4f423d3..7134fe8 100644 (file)
--- 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 665ce3f..e8bb4c4 100644 (file)
--- 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 0d371ed..3a80a69 100644 (file)
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -3930,7 +3930,10 @@ again:
                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);
 
@@ -4007,7 +4010,6 @@ 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,
@@ -4020,8 +4022,6 @@ 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;