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f2fs: introduce read_xattr_block 

Commit ba38c27eb9 ("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@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2017-09-04 18:58:03 +08:00 committed by Jaegeuk Kim
parent a5f433f741
commit 63840695f6
1 changed files with 24 additions and 26 deletions
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50
fs/f2fs/xattr.c
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@ -264,12 +264,31 @@ static int read_inline_xattr(struct inode *inode, struct page *ipage,
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 inode *inode, struct page *ipage,
/* 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 *inode, struct page *ipage,
/* 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);