linux-kernel - [PATCH 3/4] f2fs: factor out fsync inode entry operations

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Date:	Thu, 28 Apr 2016 23:15:56 +0800
From:	Chao Yu <chao@...nel.org>
To:	Jaegeuk Kim <jaegeuk@...nel.org>
Cc:	linux-f2fs-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] f2fs: factor out fsync inode entry operations

From: Chao Yu <yuchao0@...wei.com>

Factor out fsync inode entry operations into {add,del}_fsync_inode.

Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
 fs/f2fs/recovery.c | 59 +++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 38 insertions(+), 21 deletions(-)

diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index a646d3b..481f94e 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -67,6 +67,28 @@ static struct fsync_inode_entry *get_fsync_inode(struct
list_head *head,
 	return NULL;
 }

+static struct fsync_inode_entry * add_fsync_inode(struct list_head *head,
+							struct inode *inode)
+{
+	struct fsync_inode_entry *entry;
+
+	entry = kmem_cache_alloc(fsync_entry_slab, GFP_F2FS_ZERO);
+	if (!entry)
+		return NULL;
+
+	entry->inode = inode;
+	list_add_tail(&entry->list, head);
+
+	return entry;
+}
+
+static void del_fsync_inode(struct fsync_inode_entry *entry)
+{
+	iput(entry->inode);
+	list_del(&entry->list);
+	kmem_cache_free(fsync_entry_slab, entry);
+}
+
 static int recover_dentry(struct inode *inode, struct page *ipage)
 {
 	struct f2fs_inode *raw_inode = F2FS_INODE(ipage);
@@ -198,6 +220,7 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi,
struct list_head *head)
 {
 	unsigned long long cp_ver = cur_cp_version(F2FS_CKPT(sbi));
 	struct curseg_info *curseg;
+	struct inode *inode;
 	struct page *page = NULL;
 	block_t blkaddr;
 	int err = 0;
@@ -233,27 +256,27 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi,
struct list_head *head)
 					break;
 			}

-			/* add this fsync inode to the list */
-			entry = kmem_cache_alloc(fsync_entry_slab, GFP_F2FS_ZERO);
-			if (!entry) {
-				err = -ENOMEM;
-				break;
-			}
 			/*
 			 * CP | dnode(F) | inode(DF)
 			 * For this case, we should not give up now.
 			 */
-			entry->inode = f2fs_iget(sbi->sb, ino_of_node(page));
-			if (IS_ERR(entry->inode)) {
-				err = PTR_ERR(entry->inode);
-				kmem_cache_free(fsync_entry_slab, entry);
+			inode = f2fs_iget(sbi->sb, ino_of_node(page));
+			if (IS_ERR(inode)) {
+				err = PTR_ERR(inode);
 				if (err == -ENOENT) {
 					err = 0;
 					goto next;
 				}
 				break;
 			}
-			list_add_tail(&entry->list, head);
+
+			/* add this fsync inode to the list */
+			entry = add_fsync_inode(head, inode);
+			if (!entry) {
+				err = -ENOMEM;
+				iput(inode);
+				break;
+			}
 		}
 		entry->blkaddr = blkaddr;

@@ -274,11 +297,8 @@ static void destroy_fsync_dnodes(struct list_head *head)
 {
 	struct fsync_inode_entry *entry, *tmp;

-	list_for_each_entry_safe(entry, tmp, head, list) {
-		iput(entry->inode);
-		list_del(&entry->list);
-		kmem_cache_free(fsync_entry_slab, entry);
-	}
+	list_for_each_entry_safe(entry, tmp, head, list)
+		del_fsync_inode(entry);
 }

 static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi,
@@ -533,11 +553,8 @@ static int recover_data(struct f2fs_sb_info *sbi, struct
list_head *head)
 			break;
 		}

-		if (entry->blkaddr == blkaddr) {
-			iput(entry->inode);
-			list_del(&entry->list);
-			kmem_cache_free(fsync_entry_slab, entry);
-		}
+		if (entry->blkaddr == blkaddr)
+			del_fsync_inode(entry);
 next:
 		/* check next segment */
 		blkaddr = next_blkaddr_of_node(page);
-- 
2.7.2