From 8ee93b4bb6265f2c2c13d075c3999ed83113ff4b Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 1 Jun 2023 16:59:00 +0200 Subject: [PATCH] iomap: use kiocb_write_and_wait and kiocb_invalidate_pages 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. Link: https://lkml.kernel.org/r/20230601145904.1385409-9-hch@lst.de Signed-off-by: Christoph Hellwig Reviewed-by: Damien Le Moal Reviewed-by: Hannes Reinecke Reviewed-by: Darrick J. Wong Cc: Al Viro Cc: Andreas Gruenbacher Cc: Anna Schumaker Cc: Chao Yu Cc: Christian Brauner Cc: Ilya Dryomov Cc: Jaegeuk Kim Cc: Jens Axboe Cc: Johannes Thumshirn Cc: Matthew Wilcox Cc: Miklos Szeredi Cc: Miklos Szeredi Cc: Theodore Ts'o Cc: Trond Myklebust Cc: Xiubo Li Signed-off-by: Andrew Morton --- 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 0795c54..6bd1469 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; } -- 2.7.4