[PATCH 4.14 044/114] f2fs: introduce read_xattr_block

From: Greg Kroah-Hartman
Date: Mon May 18 2020 - 13:48:39 EST


From: Chao Yu <yuchao0@xxxxxxxxxx>

commit 63840695f68c20735df8861062343cf1faa3768d upstream.

Commit ba38c27eb93e ("f2fs: enhance lookup xattr") introduces
lookup_all_xattrs duplicating from read_all_xattrs, which leaves
lots of similar codes in between them, so introduce new help
read_xattr_block to clean up redundant codes.

Signed-off-by: Chao Yu <yuchao0@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben.hutchings@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/f2fs/xattr.c | 50 ++++++++++++++++++++++++--------------------------
1 file changed, 24 insertions(+), 26 deletions(-)

--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -264,12 +264,31 @@ static int read_inline_xattr(struct inod
return 0;
}

+static int read_xattr_block(struct inode *inode, void *txattr_addr)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ nid_t xnid = F2FS_I(inode)->i_xattr_nid;
+ unsigned int inline_size = inline_xattr_size(inode);
+ struct page *xpage;
+ void *xattr_addr;
+
+ /* The inode already has an extended attribute block. */
+ xpage = get_node_page(sbi, xnid);
+ if (IS_ERR(xpage))
+ return PTR_ERR(xpage);
+
+ xattr_addr = page_address(xpage);
+ memcpy(txattr_addr + inline_size, xattr_addr, VALID_XATTR_BLOCK_SIZE);
+ f2fs_put_page(xpage, 1);
+
+ return 0;
+}
+
static int lookup_all_xattrs(struct inode *inode, struct page *ipage,
unsigned int index, unsigned int len,
const char *name, struct f2fs_xattr_entry **xe,
void **base_addr)
{
- struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
void *cur_addr, *txattr_addr, *last_addr = NULL;
nid_t xnid = F2FS_I(inode)->i_xattr_nid;
unsigned int size = xnid ? VALID_XATTR_BLOCK_SIZE : 0;
@@ -298,19 +317,9 @@ static int lookup_all_xattrs(struct inod

/* read from xattr node block */
if (xnid) {
- struct page *xpage;
- void *xattr_addr;
-
- /* The inode already has an extended attribute block. */
- xpage = get_node_page(sbi, xnid);
- if (IS_ERR(xpage)) {
- err = PTR_ERR(xpage);
+ err = read_xattr_block(inode, txattr_addr);
+ if (err)
goto out;
- }
-
- xattr_addr = page_address(xpage);
- memcpy(txattr_addr + inline_size, xattr_addr, size);
- f2fs_put_page(xpage, 1);
}

if (last_addr)
@@ -335,7 +344,6 @@ out:
static int read_all_xattrs(struct inode *inode, struct page *ipage,
void **base_addr)
{
- struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct f2fs_xattr_header *header;
nid_t xnid = F2FS_I(inode)->i_xattr_nid;
unsigned int size = VALID_XATTR_BLOCK_SIZE;
@@ -357,19 +365,9 @@ static int read_all_xattrs(struct inode

/* read from xattr node block */
if (xnid) {
- struct page *xpage;
- void *xattr_addr;
-
- /* The inode already has an extended attribute block. */
- xpage = get_node_page(sbi, xnid);
- if (IS_ERR(xpage)) {
- err = PTR_ERR(xpage);
+ err = read_xattr_block(inode, txattr_addr);
+ if (err)
goto fail;
- }
-
- xattr_addr = page_address(xpage);
- memcpy(txattr_addr + inline_size, xattr_addr, size);
- f2fs_put_page(xpage, 1);
}

header = XATTR_HDR(txattr_addr);