linux-kernel - [PATCH] f2fs: add new wraper function for reading inline data

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-next>] [day] [month] [year] [list]

Date:	Fri, 19 Feb 2016 10:50:10 +0800
From:	Shawn Lin <shawn.lin@...k-chips.com>
To:	Jaegeuk Kim <jaegeuk@...nel.org>,
	Changman Lee <cm224.lee@...sung.com>
Cc:	Chao Yu <chao2.yu@...sung.com>,
	linux-f2fs-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, Shawn Lin <shawn.lin@...k-chips.com>
Subject: [PATCH] f2fs: add new wraper function for reading inline data

This patch add __read_inline_data which will no check
PageUptodate and page->index. This can be reused by
f2fs_convert_inline_page to reduce the redundant code
copied from read_inline_data.

Signed-off-by: Shawn Lin <shawn.lin@...k-chips.com>
---

 fs/f2fs/inline.c | 26 ++++++++++++--------------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index d27347e..39eeff1 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -42,15 +42,11 @@ bool f2fs_may_inline_dentry(struct inode *inode)
 	return true;
 }
 
-void read_inline_data(struct page *page, struct page *ipage)
+static inline void __read_inline_data(struct page *page,
+				      struct page *ipage)
 {
 	void *src_addr, *dst_addr;
 
-	if (PageUptodate(page))
-		return;
-
-	f2fs_bug_on(F2FS_P_SB(page), page->index);
-
 	zero_user_segment(page, MAX_INLINE_DATA, PAGE_CACHE_SIZE);
 
 	/* Copy the whole inline data block */
@@ -61,6 +57,15 @@ void read_inline_data(struct page *page, struct page *ipage)
 	kunmap_atomic(dst_addr);
 	SetPageUptodate(page);
 }
+void read_inline_data(struct page *page, struct page *ipage)
+{
+	if (PageUptodate(page))
+		return;
+
+	f2fs_bug_on(F2FS_P_SB(page), page->index);
+
+	__read_inline_data(page, ipage);
+}
 
 bool truncate_inline_inode(struct page *ipage, u64 from)
 {
@@ -128,15 +133,8 @@ int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
 	if (PageUptodate(page))
 		goto no_update;
 
-	zero_user_segment(page, MAX_INLINE_DATA, PAGE_CACHE_SIZE);
+	__read_inline_data(page, dn->inode_page);
 
-	/* Copy the whole inline data block */
-	src_addr = inline_data_addr(dn->inode_page);
-	dst_addr = kmap_atomic(page);
-	memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
-	flush_dcache_page(page);
-	kunmap_atomic(dst_addr);
-	SetPageUptodate(page);
 no_update:
 	set_page_dirty(page);
 
-- 
2.3.7