linux-kernel - [PATCH v2] f2fs: avoid using native allocate_segment_by

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Date:   Wed, 21 Apr 2021 09:54:55 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     <jaegeuk@...nel.org>
CC:     <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>, <chao@...nel.org>,
        Chao Yu <yuchao0@...wei.com>
Subject: [PATCH v2] f2fs: avoid using native allocate_segment_by_default()

As we did for other cases, in fix_curseg_write_pointer(), let's
use wrapped f2fs_allocate_new_section() instead of native
allocate_segment_by_default(), by this way, it fixes to cover
segment allocation with curseg_lock and sentry_lock.

Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
v2:
- call wrapped function f2fs_allocate_new_section()
 fs/f2fs/f2fs.h    |  2 +-
 fs/f2fs/file.c    |  2 +-
 fs/f2fs/segment.c | 18 ++++++++++--------
 3 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 87d734f5589d..20f78281e9f0 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -3396,7 +3396,7 @@ void f2fs_get_new_segment(struct f2fs_sb_info *sbi,
 			unsigned int *newseg, bool new_sec, int dir);
 void f2fs_allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type,
 					unsigned int start, unsigned int end);
-void f2fs_allocate_new_section(struct f2fs_sb_info *sbi, int type);
+void f2fs_allocate_new_section(struct f2fs_sb_info *sbi, int type, bool force);
 void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi);
 int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range);
 bool f2fs_exist_trim_candidates(struct f2fs_sb_info *sbi,
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index d697c8900fa7..af7230fb9c1f 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1664,7 +1664,7 @@ static int expand_inode_data(struct inode *inode, loff_t offset,
 		down_write(&sbi->pin_sem);
 
 		f2fs_lock_op(sbi);
-		f2fs_allocate_new_section(sbi, CURSEG_COLD_DATA_PINNED);
+		f2fs_allocate_new_section(sbi, CURSEG_COLD_DATA_PINNED, false);
 		f2fs_unlock_op(sbi);
 
 		map.m_seg_type = CURSEG_COLD_DATA_PINNED;
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 6e740ecf0814..efd1e57384b9 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -2933,7 +2933,7 @@ void f2fs_allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type,
 }
 
 static void __allocate_new_segment(struct f2fs_sb_info *sbi, int type,
-								bool new_sec)
+						bool new_sec, bool force)
 {
 	struct curseg_info *curseg = CURSEG_I(sbi, type);
 	unsigned int old_segno;
@@ -2941,7 +2941,7 @@ static void __allocate_new_segment(struct f2fs_sb_info *sbi, int type,
 	if (!curseg->inited)
 		goto alloc;
 
-	if (curseg->next_blkoff ||
+	if (force || curseg->next_blkoff ||
 		get_valid_blocks(sbi, curseg->segno, new_sec))
 		goto alloc;
 
@@ -2953,16 +2953,17 @@ static void __allocate_new_segment(struct f2fs_sb_info *sbi, int type,
 	locate_dirty_segment(sbi, old_segno);
 }
 
-static void __allocate_new_section(struct f2fs_sb_info *sbi, int type)
+static void __allocate_new_section(struct f2fs_sb_info *sbi,
+						int type, bool force)
 {
-	__allocate_new_segment(sbi, type, true);
+	__allocate_new_segment(sbi, type, true, force);
 }
 
-void f2fs_allocate_new_section(struct f2fs_sb_info *sbi, int type)
+void f2fs_allocate_new_section(struct f2fs_sb_info *sbi, int type, bool force)
 {
 	down_read(&SM_I(sbi)->curseg_lock);
 	down_write(&SIT_I(sbi)->sentry_lock);
-	__allocate_new_section(sbi, type);
+	__allocate_new_section(sbi, type, force);
 	up_write(&SIT_I(sbi)->sentry_lock);
 	up_read(&SM_I(sbi)->curseg_lock);
 }
@@ -2974,7 +2975,7 @@ void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi)
 	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);
+		__allocate_new_segment(sbi, i, false, false);
 	up_write(&SIT_I(sbi)->sentry_lock);
 	up_read(&SM_I(sbi)->curseg_lock);
 }
@@ -4844,7 +4845,8 @@ static int fix_curseg_write_pointer(struct f2fs_sb_info *sbi, int type)
 
 	f2fs_notice(sbi, "Assign new section to curseg[%d]: "
 		    "curseg[0x%x,0x%x]", type, cs->segno, cs->next_blkoff);
-	allocate_segment_by_default(sbi, type, true);
+
+	f2fs_allocate_new_section(sbi, type, true);
 
 	/* check consistency of the zone curseg pointed to */
 	if (check_zone_write_pointer(sbi, zbd, &zone))
-- 
2.29.2