From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jaegeuk Kim Subject: [PATCH 3/5] f2fs: introduce __find_xattr for readability Date: Mon, 26 Aug 2013 20:16:39 +0900 Message-ID: <1377515801-15243-3-git-send-email-jaegeuk.kim@samsung.com> References: <1377515801-15243-1-git-send-email-jaegeuk.kim@samsung.com> Cc: Jaegeuk Kim , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net To: unlisted-recipients:; (no To-header on input) Return-path: Received: from mailout1.samsung.com ([203.254.224.24]:64107 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756612Ab3HZLQw (ORCPT ); Mon, 26 Aug 2013 07:16:52 -0400 In-reply-to: <1377515801-15243-1-git-send-email-jaegeuk.kim@samsung.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: The __find_xattr is to search the wanted xattr entry starting from the base_addr. If not found, the returned entry is the last empty xattr entry that can be allocated newly. Signed-off-by: Jaegeuk Kim --- fs/f2fs/xattr.c | 46 +++++++++++++++++++++------------------------- fs/f2fs/xattr.h | 3 +-- 2 files changed, 22 insertions(+), 27 deletions(-) diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c index 3bc307c..45a8ef8 100644 --- a/fs/f2fs/xattr.c +++ b/fs/f2fs/xattr.c @@ -246,6 +246,22 @@ static inline const struct xattr_handler *f2fs_xattr_handler(int name_index) return handler; } +static struct f2fs_xattr_entry *__find_xattr(void *base_addr, int name_index, + size_t name_len, const char *name) +{ + struct f2fs_xattr_entry *entry; + + list_for_each_xattr(entry, base_addr) { + if (entry->e_name_index != name_index) + continue; + if (entry->e_name_len != name_len) + continue; + if (!memcmp(entry->e_name, name, name_len)) + break; + } + return entry; +} + int f2fs_getxattr(struct inode *inode, int name_index, const char *name, void *buffer, size_t buffer_size) { @@ -253,8 +269,7 @@ int f2fs_getxattr(struct inode *inode, int name_index, const char *name, struct f2fs_inode_info *fi = F2FS_I(inode); struct f2fs_xattr_entry *entry; struct page *page; - void *base_addr; - int error = 0, found = 0; + int error = 0; size_t value_len, name_len; if (name == NULL) @@ -267,19 +282,9 @@ int f2fs_getxattr(struct inode *inode, int name_index, const char *name, page = get_node_page(sbi, fi->i_xattr_nid); if (IS_ERR(page)) return PTR_ERR(page); - base_addr = page_address(page); - list_for_each_xattr(entry, base_addr) { - if (entry->e_name_index != name_index) - continue; - if (entry->e_name_len != name_len) - continue; - if (!memcmp(entry->e_name, name, name_len)) { - found = 1; - break; - } - } - if (!found) { + entry = __find_xattr(page_address(page), name_index, name_len, name); + if (IS_XATTR_LAST_ENTRY(entry)) { error = -ENODATA; goto cleanup; } @@ -417,18 +422,9 @@ int f2fs_setxattr(struct inode *inode, int name_index, const char *name, } /* find entry with wanted name. */ - found = 0; - list_for_each_xattr(here, base_addr) { - if (here->e_name_index != name_index) - continue; - if (here->e_name_len != name_len) - continue; - if (!memcmp(here->e_name, name, name_len)) { - found = 1; - break; - } - } + here = __find_xattr(base_addr, name_index, name_len, name); + found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1; last = here; while (!IS_XATTR_LAST_ENTRY(last)) diff --git a/fs/f2fs/xattr.h b/fs/f2fs/xattr.h index 3c0817b..c3ec042 100644 --- a/fs/f2fs/xattr.h +++ b/fs/f2fs/xattr.h @@ -51,7 +51,7 @@ struct f2fs_xattr_entry { #define XATTR_HDR(ptr) ((struct f2fs_xattr_header *)(ptr)) #define XATTR_ENTRY(ptr) ((struct f2fs_xattr_entry *)(ptr)) -#define XATTR_FIRST_ENTRY(ptr) (XATTR_ENTRY(XATTR_HDR(ptr)+1)) +#define XATTR_FIRST_ENTRY(ptr) (XATTR_ENTRY(XATTR_HDR(ptr) + 1)) #define XATTR_ROUND (3) #define XATTR_ALIGN(size) ((size + XATTR_ROUND) & ~XATTR_ROUND) @@ -69,7 +69,6 @@ struct f2fs_xattr_entry { !IS_XATTR_LAST_ENTRY(entry);\ entry = XATTR_NEXT_ENTRY(entry)) - #define MIN_OFFSET XATTR_ALIGN(PAGE_SIZE - \ sizeof(struct node_footer) - \ sizeof(__u32)) -- 1.8.3.1.437.g0dbd812