From: Chao Yu <chao@kernel.org>
Date: Thu, 16 Nov 2023 06:25:55 +0000 (+0800)
Subject: f2fs: use shared inode lock during f2fs_fiemap()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9458915036ddef536d4abdd01b9b3c067f7d7a9f;p=linux.git

f2fs: use shared inode lock during f2fs_fiemap()

f2fs_fiemap() will only traverse metadata of inode, let's use shared
inode lock for it to avoid unnecessary race on inode lock.

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 4e42b5f24debe..42f0f6184f736 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1992,7 +1992,7 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 	if (ret)
 		return ret;
 
-	inode_lock(inode);
+	inode_lock_shared(inode);
 
 	maxbytes = max_file_blocks(inode) << F2FS_BLKSIZE_BITS;
 	if (start > maxbytes) {
@@ -2112,7 +2112,7 @@ out:
 	if (ret == 1)
 		ret = 0;
 
-	inode_unlock(inode);
+	inode_unlock_shared(inode);
 	return ret;
 }