diff mbox series

[5.11,129/329] f2fs: fix to cover __allocate_new_section() with curseg_lock

Message ID 20210517140306.475967255@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH May 17, 2021, 2 p.m. UTC 
From: Chao Yu <yuchao0@huawei.com>

[ Upstream commit 823d13e12b6cbaef2f6e5d63c648643e7bc094dd ]

In order to avoid race with f2fs_do_replace_block().

Fixes: f5a53edcf01e ("f2fs: support aligned pinned file")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/f2fs/segment.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index ab0a2d2de9a9..73db79d958bd 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -2955,19 +2955,23 @@  static void __allocate_new_section(struct f2fs_sb_info *sbi, int type)
 
 void f2fs_allocate_new_section(struct f2fs_sb_info *sbi, int type)
 {
+	down_read(&SM_I(sbi)->curseg_lock);
 	down_write(&SIT_I(sbi)->sentry_lock);
 	__allocate_new_section(sbi, type);
 	up_write(&SIT_I(sbi)->sentry_lock);
+	up_read(&SM_I(sbi)->curseg_lock);
 }
 
 void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi)
 {
 	int i;
 
+	down_read(&SM_I(sbi)->curseg_lock);
 	down_write(&SIT_I(sbi)->sentry_lock);
 	for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++)
 		__allocate_new_segment(sbi, i, false);
 	up_write(&SIT_I(sbi)->sentry_lock);
+	up_read(&SM_I(sbi)->curseg_lock);
 }
 
 static const struct segment_allocation default_salloc_ops = {