linux-kernel - [PATCH 2/2] ubifs: Allow O

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 19 Aug 2015 22:35:53 +0200
From:	Richard Weinberger <richard@....at>
To:	linux-mtd@...ts.infradead.org
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Richard Weinberger <richard@....at>,
	Dongsheng Yang <yangds.fnst@...fujitsu.com>,
	dedekind1@...il.com
Subject: [PATCH 2/2] ubifs: Allow O_DIRECT

Currently UBIFS does not support direct IO, but some applications
blindly use the O_DIRECT flag.
Instead of failing upon open() we can do better and fall back
to buffered IO.

Cc: Dongsheng Yang <yangds.fnst@...fujitsu.com>
Cc: dedekind1@...il.com
Suggested-by: Dave Chinner <david@...morbit.com>
Signed-off-by: Richard Weinberger <richard@....at>
---
 fs/ubifs/file.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index a3dfe2a..a61fe86 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1540,6 +1540,15 @@ static int ubifs_file_mmap(struct file *file, struct vm_area_struct *vma)
 	return 0;
 }
 
+/*
+ * For now fall back to buffered IO.
+ */
+static ssize_t ubifs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+				   loff_t offset)
+{
+	return 0;
+}
+
 const struct address_space_operations ubifs_file_address_operations = {
 	.readpage       = ubifs_readpage,
 	.writepage      = ubifs_writepage,
@@ -1548,6 +1557,7 @@ const struct address_space_operations ubifs_file_address_operations = {
 	.invalidatepage = ubifs_invalidatepage,
 	.set_page_dirty = ubifs_set_page_dirty,
 	.releasepage    = ubifs_releasepage,
+	.direct_IO	= ubifs_direct_IO,
 };
 
 const struct inode_operations ubifs_file_inode_operations = {
-- 
1.8.4.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/