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f2fs: fix to cover __allocate_new_section() with curseg_lock

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In order to avoid race with f2fs_do_replace_block().

Fixes: f5a53edcf0 ("f2fs: support aligned pinned file")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2021-03-26 09:46:22 +08:00 • committed by Jaegeuk Kim
commit 79d06e20a4
1 changed files with 4 additions and 0 deletions
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4
fs/f2fs/segment.c
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@ -2945,19 +2945,23 @@ 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 = {