[RFC,04/11] iov_iter: Use IOCB_WRITE rather than iterator direction

Message ID	20230630152524.661208-5-dhowells@redhat.com (mailing list archive)
State	New
Headers	show Return-Path: <owner-linux-mm@kvack.org> From: David Howells <dhowells@redhat.com> To: Jens Axboe <axboe@kernel.dk>, Al Viro <viro@zeniv.linux.org.uk>, Christoph Hellwig <hch@infradead.org> Cc: David Howells <dhowells@redhat.com>, Matthew Wilcox <willy@infradead.org>, Jan Kara <jack@suse.cz>, Jeff Layton <jlayton@kernel.org>, David Hildenbrand <david@redhat.com>, Jason Gunthorpe <jgg@nvidia.com>, Logan Gunthorpe <logang@deltatee.com>, Hillf Danton <hdanton@sina.com>, Christian Brauner <brauner@kernel.org>, linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Christoph Hellwig <hch@lst.de>, Christian Brauner <christian@brauner.io> Subject: [RFC PATCH 04/11] iov_iter: Use IOCB_WRITE rather than iterator direction Date: Fri, 30 Jun 2023 16:25:17 +0100 Message-ID: <20230630152524.661208-5-dhowells@redhat.com> In-Reply-To: <20230630152524.661208-1-dhowells@redhat.com> References: <20230630152524.661208-1-dhowells@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	iov_iter: Use I/O direction from kiocb, iomap & request rather than iov_iter \| expand [RFC,00/11] iov_iter: Use I/O direction from kiocb, iomap & request rather than iov_iter [RFC,01/11] iov_iter: Fix comment refs to iov_iter_get_pages/pages_alloc() [RFC,02/11] vfs: Set IOCB_WRITE in iocbs that we're going to write from [RFC,03/11] vfs: Use init_kiocb() to initialise new IOCBs [RFC,04/11] iov_iter: Use IOCB_WRITE rather than iterator direction [RFC,05/11] iov_iter: Use IOMAP_WRITE rather than iterator direction [RFC,06/11] iov_iter: Use op_is_write() rather than iterator direction [RFC,07/11] cifs: Drop the check using iov_iter_rw() [RFC,08/11] iov_iter: Drop iov_iter_rw() and fold in last user [RFC,09/11] iov_iter: Use I/O dir flags with iov_iter_extract_pages() [RFC,10/11] 9p: Pin pages rather than ref'ing if appropriate [RFC,11/11] scsi: Use extract_iter_to_sg()

diff --git a/block/fops.c b/block/fops.c index a286bf3325c5..e70a5ef4d447 100644 --- a/block/fops.c +++ b/block/fops.c @@ -73,7 +73,7 @@ static ssize_t __blkdev_direct_IO_simple(struct kiocb *iocb, return -ENOMEM; } - if (iov_iter_rw(iter) == READ) { + if (iocb_is_read(iocb)) { bio_init(&bio, bdev, vecs, nr_pages, REQ_OP_READ); if (user_backed_iter(iter)) should_dirty = true; @@ -88,7 +88,7 @@ static ssize_t __blkdev_direct_IO_simple(struct kiocb *iocb, goto out; ret = bio.bi_iter.bi_size; - if (iov_iter_rw(iter) == WRITE) + if (iocb_is_write(iocb)) task_io_account_write(ret); if (iocb->ki_flags & IOCB_NOWAIT) @@ -174,7 +174,7 @@ static ssize_t __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, struct blk_plug plug; struct blkdev_dio *dio; struct bio *bio; - bool is_read = (iov_iter_rw(iter) == READ), is_sync; + bool is_read = iocb_is_read(iocb), is_sync; blk_opf_t opf = is_read ? REQ_OP_READ : dio_bio_write_op(iocb); loff_t pos = iocb->ki_pos; int ret = 0; @@ -311,7 +311,7 @@ static ssize_t __blkdev_direct_IO_async(struct kiocb *iocb, unsigned int nr_pages) { struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host); - bool is_read = iov_iter_rw(iter) == READ; + bool is_read = iocb_is_read(iocb); blk_opf_t opf = is_read ? REQ_OP_READ : dio_bio_write_op(iocb); struct blkdev_dio *dio; struct bio *bio; diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c index 8a635999a7d6..18bce4f8a158 100644 --- a/fs/9p/vfs_addr.c +++ b/fs/9p/vfs_addr.c @@ -257,7 +257,7 @@ v9fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) ssize_t n; int err = 0; - if (iov_iter_rw(iter) == WRITE) { + if (iocb_is_write(iocb)) { n = p9_client_write(file->private_data, pos, iter, &err); if (n) { struct inode *inode = file_inode(file); diff --git a/fs/affs/file.c b/fs/affs/file.c index e43f2f007ac1..ad70ff27e5f2 100644 --- a/fs/affs/file.c +++ b/fs/affs/file.c @@ -400,7 +400,7 @@ affs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) loff_t offset = iocb->ki_pos; ssize_t ret; - if (iov_iter_rw(iter) == WRITE) { + if (iocb_is_write(iocb)) { loff_t size = offset + count; if (AFFS_I(inode)->mmu_private < size) @@ -408,7 +408,7 @@ affs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) } ret = blockdev_direct_IO(iocb, inode, iter, affs_get_block); - if (ret < 0 && iov_iter_rw(iter) == WRITE) + if (ret < 0 && iocb_is_write(iocb)) affs_write_failed(mapping, offset + count); return ret; } diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 3bb27b9ce751..453429e9b9e6 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -1280,7 +1280,7 @@ ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter, struct timespec64 mtime = current_time(inode); size_t count = iov_iter_count(iter); loff_t pos = iocb->ki_pos; - bool write = iov_iter_rw(iter) == WRITE; + bool write = iocb_is_write(iocb); bool should_dirty = !write && user_backed_iter(iter); if (write && ceph_snap(file_inode(file)) != CEPH_NOSNAP) diff --git a/fs/dax.c b/fs/dax.c index 2ababb89918d..5c6ebe64a3fd 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -1573,7 +1573,7 @@ dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter, if (!iomi.len) return 0; - if (iov_iter_rw(iter) == WRITE) { + if (iocb_is_write(iocb)) { lockdep_assert_held_write(&iomi.inode->i_rwsem); iomi.flags |= IOMAP_WRITE; } else { diff --git a/fs/direct-io.c b/fs/direct-io.c index 7bc494ee56b9..2b517cc5b32d 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -1125,7 +1125,7 @@ ssize_t __blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, */ /* watch out for a 0 len io from a tricksy fs */ - if (iov_iter_rw(iter) == READ && !count) + if (iocb_is_read(iocb) && !count) return 0; dio = kmem_cache_alloc(dio_cache, GFP_KERNEL); @@ -1139,7 +1139,7 @@ ssize_t __blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, memset(dio, 0, offsetof(struct dio, pages)); dio->flags = flags; - if (dio->flags & DIO_LOCKING && iov_iter_rw(iter) == READ) { + if (dio->flags & DIO_LOCKING && iocb_is_read(iocb)) { /* will be released by direct_io_worker */ inode_lock(inode); } @@ -1147,7 +1147,7 @@ ssize_t __blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, /* Once we sampled i_size check for reads beyond EOF */ dio->i_size = i_size_read(inode); - if (iov_iter_rw(iter) == READ && offset >= dio->i_size) { + if (iocb_is_read(iocb) && offset >= dio->i_size) { retval = 0; goto fail_dio; } @@ -1160,7 +1160,7 @@ ssize_t __blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, goto fail_dio; } - if (dio->flags & DIO_LOCKING && iov_iter_rw(iter) == READ) { + if (dio->flags & DIO_LOCKING && iocb_is_read(iocb)) { struct address_space *mapping = iocb->ki_filp->f_mapping; retval = filemap_write_and_wait_range(mapping, offset, end - 1); @@ -1176,13 +1176,13 @@ ssize_t __blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, */ if (is_sync_kiocb(iocb)) dio->is_async = false; - else if (iov_iter_rw(iter) == WRITE && end > i_size_read(inode)) + else if (iocb_is_write(iocb) && end > i_size_read(inode)) dio->is_async = false; else dio->is_async = true; dio->inode = inode; - if (iov_iter_rw(iter) == WRITE) { + if (iocb_is_write(iocb)) { dio->opf = REQ_OP_WRITE | REQ_SYNC | REQ_IDLE; if (iocb->ki_flags & IOCB_NOWAIT) dio->opf |= REQ_NOWAIT; @@ -1194,7 +1194,7 @@ ssize_t __blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, * For AIO O_(D)SYNC writes we need to defer completions to a workqueue * so that we can call ->fsync. */ - if (dio->is_async && iov_iter_rw(iter) == WRITE) { + if (dio->is_async && iocb_is_write(iocb)) { retval = 0; if (iocb_is_dsync(iocb)) retval = dio_set_defer_completion(dio); @@ -1230,7 +1230,7 @@ ssize_t __blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, spin_lock_init(&dio->bio_lock); dio->refcount = 1; - dio->should_dirty = user_backed_iter(iter) && iov_iter_rw(iter) == READ; + dio->should_dirty = user_backed_iter(iter) && iocb_is_read(iocb); sdio.iter = iter; sdio.final_block_in_request = end >> blkbits; @@ -1287,7 +1287,7 @@ ssize_t __blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, * we can let i_mutex go now that its achieved its purpose * of protecting us from looking up uninitialized blocks. */ - if (iov_iter_rw(iter) == READ && (dio->flags & DIO_LOCKING)) + if (iocb_is_read(iocb) && (dio->flags & DIO_LOCKING)) inode_unlock(dio->inode); /* @@ -1299,7 +1299,7 @@ ssize_t __blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, */ BUG_ON(retval == -EIOCBQUEUED); if (dio->is_async && retval == 0 && dio->result && - (iov_iter_rw(iter) == READ || dio->result == count)) + (iocb_is_read(iocb) || dio->result == count)) retval = -EIOCBQUEUED; else dio_await_completion(dio); @@ -1312,7 +1312,7 @@ ssize_t __blockdev_direct_IO(struct kiocb *iocb, struct inode *inode, return retval; fail_dio: - if (dio->flags & DIO_LOCKING && iov_iter_rw(iter) == READ) + if (dio->flags & DIO_LOCKING && iocb_is_read(iocb)) inode_unlock(inode); kmem_cache_free(dio_cache, dio); diff --git a/fs/exfat/inode.c b/fs/exfat/inode.c index 481dd338f2b8..706db9cd1b4e 100644 --- a/fs/exfat/inode.c +++ b/fs/exfat/inode.c @@ -411,10 +411,10 @@ static ssize_t exfat_direct_IO(struct kiocb *iocb, struct iov_iter *iter) struct address_space *mapping = iocb->ki_filp->f_mapping; struct inode *inode = mapping->host; loff_t size = iocb->ki_pos + iov_iter_count(iter); - int rw = iov_iter_rw(iter); + bool writing = iocb_is_write(iocb); ssize_t ret; - if (rw == WRITE) { + if (writing) { /* * FIXME: blockdev_direct_IO() doesn't use ->write_begin(), * so we need to update the ->i_size_aligned to block boundary. @@ -433,7 +433,7 @@ static ssize_t exfat_direct_IO(struct kiocb *iocb, struct iov_iter *iter) * condition of exfat_get_block() and ->truncate(). */ ret = blockdev_direct_IO(iocb, inode, iter, exfat_get_block); - if (ret < 0 && (rw & WRITE)) + if (ret < 0 && writing) exfat_write_failed(mapping, size); return ret; } diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 26f135e7ffce..b239c16ab7ee 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -919,7 +919,7 @@ ext2_direct_IO(struct kiocb *iocb, struct iov_iter *iter) ssize_t ret; ret = blockdev_direct_IO(iocb, inode, iter, ext2_get_block); - if (ret < 0 && iov_iter_rw(iter) == WRITE) + if (ret < 0 && iocb_is_write(iocb)) ext2_write_failed(mapping, offset + count); return ret; } diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 2435111a8532..7ef596b901d9 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -805,7 +805,7 @@ int f2fs_truncate(struct inode *inode) return 0; } -static bool f2fs_force_buffered_io(struct inode *inode, int rw) +static bool f2fs_force_buffered_io(struct inode *inode, bool writing) { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); @@ -823,9 +823,9 @@ static bool f2fs_force_buffered_io(struct inode *inode, int rw) * for blkzoned device, fallback direct IO to buffered IO, so * all IOs can be serialized by log-structured write. */ - if (f2fs_sb_has_blkzoned(sbi) && (rw == WRITE)) + if (f2fs_sb_has_blkzoned(sbi) && writing) return true; - if (f2fs_lfs_mode(sbi) && rw == WRITE && F2FS_IO_ALIGNED(sbi)) + if (f2fs_lfs_mode(sbi) && writing && F2FS_IO_ALIGNED(sbi)) return true; if (is_sbi_flag_set(sbi, SBI_CP_DISABLED)) return true; @@ -861,7 +861,7 @@ int f2fs_getattr(struct mnt_idmap *idmap, const struct path *path, unsigned int bsize = i_blocksize(inode); stat->result_mask |= STATX_DIOALIGN; - if (!f2fs_force_buffered_io(inode, WRITE)) { + if (!f2fs_force_buffered_io(inode, true)) { stat->dio_mem_align = bsize; stat->dio_offset_align = bsize; } @@ -4280,7 +4280,7 @@ static bool f2fs_should_use_dio(struct inode *inode, struct kiocb *iocb, if (!(iocb->ki_flags & IOCB_DIRECT)) return false; - if (f2fs_force_buffered_io(inode, iov_iter_rw(iter))) + if (f2fs_force_buffered_io(inode, iocb_is_write(iocb))) return false; /* diff --git a/fs/fat/inode.c b/fs/fat/inode.c index d99b8549ec8f..237e20891df2 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -261,7 +261,7 @@ static ssize_t fat_direct_IO(struct kiocb *iocb, struct iov_iter *iter) loff_t offset = iocb->ki_pos; ssize_t ret; - if (iov_iter_rw(iter) == WRITE) { + if (iocb_is_write(iocb)) { /* * FIXME: blockdev_direct_IO() doesn't use ->write_begin(), * so we need to update the ->mmu_private to block boundary. @@ -281,7 +281,7 @@ static ssize_t fat_direct_IO(struct kiocb *iocb, struct iov_iter *iter) * condition of fat_get_block() and ->truncate(). */ ret = blockdev_direct_IO(iocb, inode, iter, fat_get_block); - if (ret < 0 && iov_iter_rw(iter) == WRITE) + if (ret < 0 && iocb_is_write(iocb)) fat_write_failed(mapping, offset + count); return ret; diff --git a/fs/fuse/dax.c b/fs/fuse/dax.c index 8e74f278a3f6..7bfbe1783462 100644 --- a/fs/fuse/dax.c +++ b/fs/fuse/dax.c @@ -720,7 +720,7 @@ static bool file_extending_write(struct kiocb *iocb, struct iov_iter *from) { struct inode *inode = file_inode(iocb->ki_filp); - return (iov_iter_rw(from) == WRITE && + return (iocb_is_write(iocb) && ((iocb->ki_pos) >= i_size_read(inode) || (iocb->ki_pos + iov_iter_count(from) > i_size_read(inode)))); } diff --git a/fs/fuse/file.c b/fs/fuse/file.c index bc4115288eec..f43a39faa8e4 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -2911,7 +2911,7 @@ fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter) inode = file->f_mapping->host; i_size = i_size_read(inode); - if ((iov_iter_rw(iter) == READ) && (offset >= i_size)) + if (iocb_is_read(iocb) && (offset >= i_size)) return 0; io = kmalloc(sizeof(struct fuse_io_priv), GFP_KERNEL); @@ -2923,7 +2923,7 @@ fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter) io->bytes = -1; io->size = 0; io->offset = offset; - io->write = (iov_iter_rw(iter) == WRITE); + io->write = iocb_is_write(iocb); io->err = 0; /* * By default, we want to optimize all I/Os with async request @@ -2956,7 +2956,7 @@ fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter) io->done = &wait; } - if (iov_iter_rw(iter) == WRITE) { + if (iocb_is_write(iocb)) { ret = fuse_direct_io(io, iter, &pos, FUSE_DIO_WRITE); fuse_invalidate_attr_mask(inode, FUSE_STATX_MODSIZE); } else { @@ -2979,7 +2979,7 @@ fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter) kref_put(&io->refcnt, fuse_io_release); - if (iov_iter_rw(iter) == WRITE) { + if (iocb_is_write(iocb)) { fuse_write_update_attr(inode, pos, ret); /* For extending writes we already hold exclusive lock */ if (ret < 0 && offset + count > i_size) diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c index 441d7fc952e3..d95ac1f559b5 100644 --- a/fs/hfs/inode.c +++ b/fs/hfs/inode.c @@ -141,7 +141,7 @@ static ssize_t hfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) * In case of error extending write may have instantiated a few * blocks outside i_size. Trim these off again. */ - if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) { + if (unlikely(iocb_is_write(iocb) && ret < 0)) { loff_t isize = i_size_read(inode); loff_t end = iocb->ki_pos + count; diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c index 7d1a675e037d..9851a6cb9e3b 100644 --- a/fs/hfsplus/inode.c +++ b/fs/hfsplus/inode.c @@ -138,7 +138,7 @@ static ssize_t hfsplus_direct_IO(struct kiocb *iocb, struct iov_iter *iter) * In case of error extending write may have instantiated a few * blocks outside i_size. Trim these off again. */ - if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) { + if (unlikely(iocb_is_write(iocb) && ret < 0)) { loff_t isize = i_size_read(inode); loff_t end = iocb->ki_pos + count; diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c index ea3b868c8355..a56099470185 100644 --- a/fs/iomap/direct-io.c +++ b/fs/iomap/direct-io.c @@ -510,7 +510,7 @@ __iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter, if (iocb->ki_flags & IOCB_NOWAIT) iomi.flags |= IOMAP_NOWAIT; - if (iov_iter_rw(iter) == READ) { + if (iocb_is_read(iocb)) { if (iomi.pos >= dio->i_size) goto out_free_dio; diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c index 8ac10e396050..0d1f94ac9488 100644 --- a/fs/jfs/inode.c +++ b/fs/jfs/inode.c @@ -334,7 +334,7 @@ static ssize_t jfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) * In case of error extending write may have instantiated a few * blocks outside i_size. Trim these off again. */ - if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) { + if (unlikely(iocb_is_write(iocb) && ret < 0)) { loff_t isize = i_size_read(inode); loff_t end = iocb->ki_pos + count; diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 9a18c5a69ace..5f4522dd05b5 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -133,7 +133,7 @@ int nfs_swap_rw(struct kiocb *iocb, struct iov_iter *iter) VM_BUG_ON(iov_iter_count(iter) != PAGE_SIZE); - if (iov_iter_rw(iter) == READ) + if (iocb_is_read(iocb)) ret = nfs_file_direct_read(iocb, iter, true); else ret = nfs_file_direct_write(iocb, iter, true); diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c index a8ce522ac747..93c61fcb5e91 100644 --- a/fs/nilfs2/inode.c +++ b/fs/nilfs2/inode.c @@ -289,7 +289,7 @@ nilfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) { struct inode *inode = file_inode(iocb->ki_filp); - if (iov_iter_rw(iter) == WRITE) + if (iocb_is_write(iocb)) return 0; /* Needs synchronization with the cleaner */ diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c index 6c560245eef4..5b50c4653ff8 100644 --- a/fs/ntfs3/inode.c +++ b/fs/ntfs3/inode.c @@ -774,7 +774,7 @@ static ssize_t ntfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) struct ntfs_inode *ni = ntfs_i(inode); loff_t vbo = iocb->ki_pos; loff_t end; - int wr = iov_iter_rw(iter) & WRITE; + bool wr = iocb_is_write(iocb); size_t iter_count = iov_iter_count(iter); loff_t valid; ssize_t ret; diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index 8dfc284e85f0..e8afc0c13f71 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -2456,7 +2456,7 @@ static ssize_t ocfs2_direct_IO(struct kiocb *iocb, struct iov_iter *iter) !ocfs2_supports_append_dio(osb)) return 0; - if (iov_iter_rw(iter) == READ) + if (iocb_is_read(iocb)) get_block = ocfs2_lock_get_block; else get_block = ocfs2_dio_wr_get_block; diff --git a/fs/orangefs/inode.c b/fs/orangefs/inode.c index 9014bbcc8031..120a9a6c0f3b 100644 --- a/fs/orangefs/inode.c +++ b/fs/orangefs/inode.c @@ -513,7 +513,7 @@ static ssize_t orangefs_direct_IO(struct kiocb *iocb, */ struct file *file = iocb->ki_filp; loff_t pos = iocb->ki_pos; - enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ? + enum ORANGEFS_io_type type = iocb_is_write(iocb) ? ORANGEFS_IO_WRITE : ORANGEFS_IO_READ; loff_t *offset = &pos; struct inode *inode = file->f_mapping->host; diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c index 77bd3b27059f..ca57930178f4 100644 --- a/fs/reiserfs/inode.c +++ b/fs/reiserfs/inode.c @@ -3248,7 +3248,7 @@ static ssize_t reiserfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) * In case of error extending write may have instantiated a few * blocks outside i_size. Trim these off again. */ - if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) { + if (unlikely(iocb_is_write(iocb) && ret < 0)) { loff_t isize = i_size_read(inode); loff_t end = iocb->ki_pos + count; diff --git a/fs/udf/inode.c b/fs/udf/inode.c index 1e71e04ae8f6..d49c12c1f4d9 100644 --- a/fs/udf/inode.c +++ b/fs/udf/inode.c @@ -311,7 +311,7 @@ static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter) if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) return 0; ret = blockdev_direct_IO(iocb, inode, iter, udf_get_block); - if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE)) + if (unlikely(ret < 0 && iocb_is_write(iocb))) udf_write_failed(mapping, iocb->ki_pos + count); return ret; } diff --git a/include/linux/fs.h b/include/linux/fs.h index 466eba253502..e344db819498 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -368,6 +368,16 @@ static inline bool is_sync_kiocb(struct kiocb *kiocb) return kiocb->ki_complete == NULL; } +static inline bool iocb_is_write(const struct kiocb *kiocb) +{ + return kiocb->ki_flags & IOCB_WRITE; +} + +static inline bool iocb_is_read(const struct kiocb *kiocb) +{ + return !iocb_is_write(kiocb); +} + struct address_space_operations { int (*writepage)(struct page *page, struct writeback_control *wbc); int (*read_folio)(struct file *, struct folio *);

[RFC,04/11] iov_iter: Use IOCB_WRITE rather than iterator direction

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Patch