[PATCH] f2fs: introduce sanity_check_blocks()

[Yangtao Li]

There are very similar codes in release_compress_blocks() and
reserve_compress_blocks() which is used for data blocks check.

This patch introduces a new helper sanity_check_blocks()
to include those common codes, and used it instead for cleanup.

Signed-off-by: Yangtao Li <frank.li@xxxxxxxx>
---
 fs/f2fs/file.c | 36 ++++++++++++++++++++----------------
 1 file changed, 20 insertions(+), 16 deletions(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index f5c1b7814954..0d539155379c 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3369,11 +3369,9 @@ static int f2fs_get_compress_blocks(struct file *filp, unsigned long arg)
 	return put_user(blocks, (u64 __user *)arg);
 }
 
-static int release_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
+static int sanity_check_blocks(struct dnode_of_data *dn, pgoff_t count)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
-	unsigned int released_blocks = 0;
-	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
 	block_t blkaddr;
 	int i;
 
@@ -3390,6 +3388,21 @@ static int release_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
 		}
 	}
 
+	return 0;
+}
+
+static int release_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
+	unsigned int released_blocks = 0;
+	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
+	block_t blkaddr;
+	int i, rc;
+
+	rc = sanity_check_blocks(dn, count);
+	if (rc)
+		return rc;
+
 	while (count) {
 		int compr_blocks = 0;
 
@@ -3539,20 +3552,11 @@ static int reserve_compress_blocks(struct dnode_of_data *dn, pgoff_t count)
 	unsigned int reserved_blocks = 0;
 	int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
 	block_t blkaddr;
-	int i;
+	int i, rc;
 
-	for (i = 0; i < count; i++) {
-		blkaddr = data_blkaddr(dn->inode, dn->node_page,
-						dn->ofs_in_node + i);
-
-		if (!__is_valid_data_blkaddr(blkaddr))
-			continue;
-		if (unlikely(!f2fs_is_valid_blkaddr(sbi, blkaddr,
-					DATA_GENERIC_ENHANCE))) {
-			f2fs_handle_error(sbi, ERROR_INVALID_BLKADDR);
-			return -EFSCORRUPTED;
-		}
-	}
+	rc = sanity_check_blocks(dn, count);
+	if (rc)
+		return rc;
 
 	while (count) {
 		int compr_blocks = 0;
-- 
2.25.1