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Message-Id: <20171016230642.94228-1-jaegeuk@kernel.org>
Date: Mon, 16 Oct 2017 16:06:42 -0700
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net
Cc: Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH] f2fs: handle error case when adding xattr entry
This patch fixes recovering incomplete xattr entries remaining in inline xattr
and xattr block, caused by any kind of errors.
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
fs/f2fs/xattr.c | 48 ++++++++++++++++++++++++++++--------------------
1 file changed, 28 insertions(+), 20 deletions(-)
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index e74a4d7f744a..5a9c5e6ad714 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -389,10 +389,11 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
size_t inline_size = inline_xattr_size(inode);
- void *xattr_addr;
+ struct page *in_page = NULL;
+ void *xattr_addr, *inline_addr;
struct page *xpage;
nid_t new_nid = 0;
- int err;
+ int err = 0;
if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid)
if (!alloc_nid(sbi, &new_nid))
@@ -400,30 +401,30 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
/* write to inline xattr */
if (inline_size) {
- struct page *page = NULL;
- void *inline_addr;
-
if (ipage) {
inline_addr = inline_xattr_addr(inode, ipage);
- f2fs_wait_on_page_writeback(ipage, NODE, true);
- set_page_dirty(ipage);
} else {
- page = get_node_page(sbi, inode->i_ino);
- if (IS_ERR(page)) {
+ in_page = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(in_page)) {
alloc_nid_failed(sbi, new_nid);
- return PTR_ERR(page);
+ return PTR_ERR(in_page);
}
- inline_addr = inline_xattr_addr(inode, page);
- f2fs_wait_on_page_writeback(page, NODE, true);
+ inline_addr = inline_xattr_addr(inode, in_page);
}
- memcpy(inline_addr, txattr_addr, inline_size);
- f2fs_put_page(page, 1);
+ f2fs_wait_on_page_writeback(ipage ? ipage : in_page,
+ NODE, true);
/* no need to use xattr node block */
if (hsize <= inline_size) {
err = truncate_xattr_node(inode, ipage);
alloc_nid_failed(sbi, new_nid);
- return err;
+ if (err) {
+ f2fs_put_page(in_page, 1);
+ return err;
+ }
+ memcpy(inline_addr, txattr_addr, inline_size);
+ set_page_dirty(ipage ? ipage : in_page);
+ goto in_page_out;
}
}
@@ -432,7 +433,7 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
xpage = get_node_page(sbi, F2FS_I(inode)->i_xattr_nid);
if (IS_ERR(xpage)) {
alloc_nid_failed(sbi, new_nid);
- return PTR_ERR(xpage);
+ goto in_page_out;
}
f2fs_bug_on(sbi, new_nid);
f2fs_wait_on_page_writeback(xpage, NODE, true);
@@ -442,17 +443,24 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
xpage = new_node_page(&dn, XATTR_NODE_OFFSET);
if (IS_ERR(xpage)) {
alloc_nid_failed(sbi, new_nid);
- return PTR_ERR(xpage);
+ goto in_page_out;
}
alloc_nid_done(sbi, new_nid);
}
-
xattr_addr = page_address(xpage);
+
+ if (inline_size)
+ memcpy(inline_addr, txattr_addr, inline_size);
memcpy(xattr_addr, txattr_addr + inline_size, VALID_XATTR_BLOCK_SIZE);
+
+ if (inline_size)
+ set_page_dirty(ipage ? ipage : in_page);
set_page_dirty(xpage);
- f2fs_put_page(xpage, 1);
- return 0;
+ f2fs_put_page(xpage, 1);
+in_page_out:
+ f2fs_put_page(in_page, 1);
+ return err;
}
int f2fs_getxattr(struct inode *inode, int index, const char *name,
--
2.14.0.rc1.383.gd1ce394fe2-goog
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