linux-kernel - [PATCH v1 3/3] exfat: remove duplicate write inode for extending dir/file

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Date:   Wed, 6 Jul 2022 02:34:55 +0000
From:   "Yuezhang.Mo@...y.com" <Yuezhang.Mo@...y.com>
To:     Namjae Jeon <linkinjeon@...nel.org>,
        "sj1557.seo@...sung.com" <sj1557.seo@...sung.com>
CC:     "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Andy.Wu@...y.com" <Andy.Wu@...y.com>,
        "Wataru.Aoyama@...y.com" <Wataru.Aoyama@...y.com>
Subject: [PATCH v1 3/3] exfat: remove duplicate write inode for extending
 dir/file

Since the timestamps need to be updated, the directory entries
will be updated by mark_inode_dirty() whether or not a new
cluster is allocated for the file or directory, so there is no
need to use __exfat_write_inode() to update the directory entries
when allocating a new cluster for a file or directory.

Signed-off-by: Yuezhang Mo <Yuezhang.Mo@...y.com>
Reviewed-by: Andy Wu <Andy.Wu@...y.com>
Reviewed-by: Aoyama Wataru <wataru.aoyama@...y.com>
Reviewed-by: Daniel Palmer <daniel.palmer@...y.com>
---
 fs/exfat/inode.c | 9 +--------
 fs/exfat/namei.c | 4 ----
 2 files changed, 1 insertion(+), 12 deletions(-)

diff --git a/fs/exfat/inode.c b/fs/exfat/inode.c
index 3acfbec1a0d4..a795437b86d0 100644
--- a/fs/exfat/inode.c
+++ b/fs/exfat/inode.c
@@ -112,7 +112,7 @@ void exfat_sync_inode(struct inode *inode)
 static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
 		unsigned int *clu, int create)
 {
-	int ret, modified = false;
+	int ret;
 	unsigned int last_clu;
 	struct exfat_chain new_clu;
 	struct super_block *sb = inode->i_sb;
@@ -203,7 +203,6 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
 			if (new_clu.flags == ALLOC_FAT_CHAIN)
 				ei->flags = ALLOC_FAT_CHAIN;
 			ei->start_clu = new_clu.dir;
-			modified = true;
 		} else {
 			if (new_clu.flags != ei->flags) {
 				/* no-fat-chain bit is disabled,
@@ -213,7 +212,6 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
 				exfat_chain_cont_cluster(sb, ei->start_clu,
 					num_clusters);
 				ei->flags = ALLOC_FAT_CHAIN;
-				modified = true;
 			}
 			if (new_clu.flags == ALLOC_FAT_CHAIN)
 				if (exfat_ent_set(sb, last_clu, new_clu.dir))
@@ -223,11 +221,6 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
 		num_clusters += num_to_be_allocated;
 		*clu = new_clu.dir;
 
-		if (modified) {
-			if (__exfat_write_inode(inode, inode_needs_sync(inode)))
-				return -EIO;
-		}
-
 		inode->i_blocks +=
 			num_to_be_allocated << sbi->sect_per_clus_bits;
 
diff --git a/fs/exfat/namei.c b/fs/exfat/namei.c
index f6f8725803dc..6bf9abc45090 100644
--- a/fs/exfat/namei.c
+++ b/fs/exfat/namei.c
@@ -382,10 +382,6 @@ static int exfat_find_empty_entry(struct inode *inode,
 		p_dir->size++;
 		size = EXFAT_CLU_TO_B(p_dir->size, sbi);
 
-		/* update the directory entry */
-		if (__exfat_write_inode(inode, IS_DIRSYNC(inode)))
-			return -EIO;
-
 		/* directory inode should be updated in here */
 		i_size_write(inode, size);
 		ei->i_size_ondisk += sbi->cluster_size;
-- 
2.25.1

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