From patchwork Mon Feb 12 09:43:38 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chandan Rajendra X-Patchwork-Id: 10212025 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D7E9D60467 for ; Mon, 12 Feb 2018 09:42:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C90BF28334 for ; Mon, 12 Feb 2018 09:42:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BD21F28922; Mon, 12 Feb 2018 09:42:43 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5CDB028334 for ; Mon, 12 Feb 2018 09:42:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753986AbeBLJmk (ORCPT ); Mon, 12 Feb 2018 04:42:40 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:54404 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753948AbeBLJmh (ORCPT ); Mon, 12 Feb 2018 04:42:37 -0500 Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w1C9eV7H061114 for ; Mon, 12 Feb 2018 04:42:36 -0500 Received: from e32.co.us.ibm.com (e32.co.us.ibm.com [32.97.110.150]) by mx0b-001b2d01.pphosted.com with ESMTP id 2g30dffxb6-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 12 Feb 2018 04:42:36 -0500 Received: from localhost by e32.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Mon, 12 Feb 2018 02:42:32 -0700 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp08027.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w1C9gVVK5439860; Mon, 12 Feb 2018 02:42:31 -0700 Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 728B3136046; Mon, 12 Feb 2018 02:42:31 -0700 (MST) Received: from localhost.in.ibm.com (unknown [9.124.35.142]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP id 891D013603A; Mon, 12 Feb 2018 02:42:29 -0700 (MST) From: Chandan Rajendra To: linux-ext4@vger.kernel.org Cc: Chandan Rajendra , linux-fsdevel@vger.kernel.org, ebiggers3@gmail.com, linux-fscrypt@vger.kernel.org, tytso@mit.edu Subject: [RFC PATCH V2 02/11] fs/buffer.c: Export end_buffer_async_read and create_page_buffers Date: Mon, 12 Feb 2018 15:13:38 +0530 X-Mailer: git-send-email 2.9.5 In-Reply-To: <20180212094347.22071-1-chandan@linux.vnet.ibm.com> References: <20180212094347.22071-1-chandan@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18021209-0004-0000-0000-000013A5B97C X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008521; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000251; SDB=6.00988573; UDB=6.00501891; IPR=6.00767928; BA=6.00005825; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00019505; XFM=3.00000015; UTC=2018-02-12 09:42:34 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18021209-0005-0000-0000-0000860CA5C3 Message-Id: <20180212094347.22071-3-chandan@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2018-02-12_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1802120125 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The functions end_buffer_async_read() and create_page_buffers() will be required by the fscrypt module to implement decrypting encrypted blocks that have been read from the filesystem. Signed-off-by: Chandan Rajendra --- fs/buffer.c | 6 ++++-- include/linux/buffer_head.h | 3 +++ 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index 551b781..663180d 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -256,7 +256,7 @@ __find_get_block_slow(struct block_device *bdev, sector_t block) * I/O completion handler for block_read_full_page() - pages * which come unlocked at the end of I/O. */ -static void end_buffer_async_read(struct buffer_head *bh, int uptodate) +void end_buffer_async_read(struct buffer_head *bh, int uptodate) { unsigned long flags; struct buffer_head *first; @@ -312,6 +312,7 @@ static void end_buffer_async_read(struct buffer_head *bh, int uptodate) local_irq_restore(flags); return; } +EXPORT_SYMBOL(end_buffer_async_read); /* * Completion handler for block_write_full_page() - pages which are unlocked @@ -1647,7 +1648,7 @@ static inline int block_size_bits(unsigned int blocksize) return ilog2(blocksize); } -static struct buffer_head *create_page_buffers(struct page *page, struct inode *inode, unsigned int b_state) +struct buffer_head *create_page_buffers(struct page *page, struct inode *inode, unsigned int b_state) { BUG_ON(!PageLocked(page)); @@ -1656,6 +1657,7 @@ static struct buffer_head *create_page_buffers(struct page *page, struct inode * b_state); return page_buffers(page); } +EXPORT_SYMBOL(create_page_buffers); /* * NOTE! All mapped/uptodate combinations are valid: diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index f1aed01..edc0983 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -161,7 +161,10 @@ struct buffer_head *alloc_page_buffers(struct page *page, unsigned long size, bool retry); void create_empty_buffers(struct page *, unsigned long, unsigned long b_state); +struct buffer_head *create_page_buffers(struct page *page, struct inode *inode, + unsigned int b_state); void end_buffer_read_sync(struct buffer_head *bh, int uptodate); +void end_buffer_async_read(struct buffer_head *bh, int uptodate); void end_buffer_write_sync(struct buffer_head *bh, int uptodate); void end_buffer_async_write(struct buffer_head *bh, int uptodate);