From patchwork Mon May 22 13:50:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13250579 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3D41EC77B75 for ; Mon, 22 May 2023 13:52:02 +0000 (UTC) Received: from [127.0.0.1] (helo=sfs-ml-1.v29.lw.sourceforge.com) by sfs-ml-1.v29.lw.sourceforge.com with esmtp (Exim 4.95) (envelope-from ) id 1q15x9-0007i2-DA; Mon, 22 May 2023 13:52:00 +0000 Received: from [172.30.20.202] (helo=mx.sourceforge.net) by sfs-ml-1.v29.lw.sourceforge.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1q15x7-0007hn-FM for linux-f2fs-devel@lists.sourceforge.net; Mon, 22 May 2023 13:51:58 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=8d8uJmrTh/75eqAaNN/foN1c757ttvO6v+jRBhlF56A=; b=S8rxu7pU/L6Q+XFDaBsjOF1/Su zdW3IRf3RftxvItHjHUX6ujRxTafGzFGA2VvH2wPhPH+/rQoMGoEPGRNVSry+Q6N128ZtmKPJMUkc FPyLQ7RjFuOnze1Uo+vDZyH5NE4xdbFdW+rip3EijUmKqj6MCcqYIZ4QjhvEfwvCi6iM=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=8d8uJmrTh/75eqAaNN/foN1c757ttvO6v+jRBhlF56A=; b=eIfA0RMUViXakScyMH0oxCs/th 3Q5MKuopLrfvNsuS9ch/wMdM2eZ0b/0JyxbWm4/Gb04a0fixlk2a6ynk3FjlKx/SXgBqnxDMjcXCx pPVE1vY8FvR0YLrJgIDSvhRcX0V4EQRzuXiDUb2SmAVrs4l/th0/0gIvbFiDPpAbp5eg=; Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by sfi-mx-2.v28.lw.sourceforge.com with esmtps (TLS1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.95) id 1q15x1-00055Z-VE for linux-f2fs-devel@lists.sourceforge.net; Mon, 22 May 2023 13:51:58 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1684763505; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8d8uJmrTh/75eqAaNN/foN1c757ttvO6v+jRBhlF56A=; b=G3Gb0leLNGy9D39/4BB8ELVvuZanIRr/qu6JoSiAkJgHKWlaQ2WHyH+sZ0dX0plq/XsHdG Yqcj7LS2in80DaBgfLmYczQZhVzBTl9ANbjG0VG967g9KLVnCxkTrXXtMfTtYQmL+qWMxZ E45mihEXFIyX2oECa+7mtG8abPGtGDE= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-103-ZtUfXtY9PdeS9nRV65CuKw-1; Mon, 22 May 2023 09:51:41 -0400 X-MC-Unique: ZtUfXtY9PdeS9nRV65CuKw-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 149CE185A797; Mon, 22 May 2023 13:51:40 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.39.192.68]) by smtp.corp.redhat.com (Postfix) with ESMTP id 59064492B0A; Mon, 22 May 2023 13:51:37 +0000 (UTC) From: David Howells To: Jens Axboe , Al Viro , Christoph Hellwig Date: Mon, 22 May 2023 14:50:06 +0100 Message-Id: <20230522135018.2742245-20-dhowells@redhat.com> In-Reply-To: <20230522135018.2742245-1-dhowells@redhat.com> References: <20230522135018.2742245-1-dhowells@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.10 X-Headers-End: 1q15x1-00055Z-VE Subject: [f2fs-dev] [PATCH v22 19/31] f2fs: Provide a splice-read wrapper X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-block@vger.kernel.org, Hillf Danton , Jan Kara , David Hildenbrand , Linus Torvalds , Jeff Layton , Christian Brauner , Matthew Wilcox , linux-kernel@vger.kernel.org, David Howells , linux-mm@kvack.org, Jason Gunthorpe , linux-fsdevel@vger.kernel.org, Jaegeuk Kim , linux-f2fs-devel@lists.sourceforge.net, Logan Gunthorpe , Christoph Hellwig Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net Provide a splice_read wrapper for f2fs. This does some checks and tracing before calling filemap_splice_read() and will update the iostats afterwards. Direct I/O is handled by the caller. Signed-off-by: David Howells cc: Christoph Hellwig cc: Al Viro cc: Jens Axboe cc: Jaegeuk Kim cc: Chao Yu cc: linux-f2fs-devel@lists.sourceforge.net cc: linux-fsdevel@vger.kernel.org cc: linux-block@vger.kernel.org cc: linux-mm@kvack.org Reviewed-by: Chao Yu --- fs/f2fs/file.c | 43 +++++++++++++++++++++++++++++++++++-------- 1 file changed, 35 insertions(+), 8 deletions(-) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 5ac53d2627d2..3fce122997ca 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -4367,22 +4367,23 @@ static ssize_t f2fs_dio_read_iter(struct kiocb *iocb, struct iov_iter *to) return ret; } -static void f2fs_trace_rw_file_path(struct kiocb *iocb, size_t count, int rw) +static void f2fs_trace_rw_file_path(struct file *file, loff_t pos, size_t count, + int rw) { - struct inode *inode = file_inode(iocb->ki_filp); + struct inode *inode = file_inode(file); char *buf, *path; buf = f2fs_getname(F2FS_I_SB(inode)); if (!buf) return; - path = dentry_path_raw(file_dentry(iocb->ki_filp), buf, PATH_MAX); + path = dentry_path_raw(file_dentry(file), buf, PATH_MAX); if (IS_ERR(path)) goto free_buf; if (rw == WRITE) - trace_f2fs_datawrite_start(inode, iocb->ki_pos, count, + trace_f2fs_datawrite_start(inode, pos, count, current->pid, path, current->comm); else - trace_f2fs_dataread_start(inode, iocb->ki_pos, count, + trace_f2fs_dataread_start(inode, pos, count, current->pid, path, current->comm); free_buf: f2fs_putname(buf); @@ -4398,7 +4399,8 @@ static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to) return -EOPNOTSUPP; if (trace_f2fs_dataread_start_enabled()) - f2fs_trace_rw_file_path(iocb, iov_iter_count(to), READ); + f2fs_trace_rw_file_path(iocb->ki_filp, iocb->ki_pos, + iov_iter_count(to), READ); if (f2fs_should_use_dio(inode, iocb, to)) { ret = f2fs_dio_read_iter(iocb, to); @@ -4413,6 +4415,30 @@ static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to) return ret; } +static ssize_t f2fs_file_splice_read(struct file *in, loff_t *ppos, + struct pipe_inode_info *pipe, + size_t len, unsigned int flags) +{ + struct inode *inode = file_inode(in); + const loff_t pos = *ppos; + ssize_t ret; + + if (!f2fs_is_compress_backend_ready(inode)) + return -EOPNOTSUPP; + + if (trace_f2fs_dataread_start_enabled()) + f2fs_trace_rw_file_path(in, pos, len, READ); + + ret = filemap_splice_read(in, ppos, pipe, len, flags); + if (ret > 0) + f2fs_update_iostat(F2FS_I_SB(inode), inode, + APP_BUFFERED_READ_IO, ret); + + if (trace_f2fs_dataread_end_enabled()) + trace_f2fs_dataread_end(inode, pos, ret); + return ret; +} + static ssize_t f2fs_write_checks(struct kiocb *iocb, struct iov_iter *from) { struct file *file = iocb->ki_filp; @@ -4714,7 +4740,8 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) ret = preallocated; } else { if (trace_f2fs_datawrite_start_enabled()) - f2fs_trace_rw_file_path(iocb, orig_count, WRITE); + f2fs_trace_rw_file_path(iocb->ki_filp, iocb->ki_pos, + orig_count, WRITE); /* Do the actual write. */ ret = dio ? @@ -4919,7 +4946,7 @@ const struct file_operations f2fs_file_operations = { #ifdef CONFIG_COMPAT .compat_ioctl = f2fs_compat_ioctl, #endif - .splice_read = generic_file_splice_read, + .splice_read = f2fs_file_splice_read, .splice_write = iter_file_splice_write, .fadvise = f2fs_file_fadvise, };