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Date: Thu, 30 Apr 2015 18:11:35 +0800
From: Chao Yu <chao2.yu@...sung.com>
To: Jaegeuk Kim <jaegeuk@...nel.org>,
Changman Lee <cm224.lee@...sung.com>
Cc: linux-f2fs-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/3] f2fs: introduce replace_block() for reuse
Introduce a generic function replace_block base on recover_data_page,
and export it. So wit it we can operate file's meta data which is in
CP/SSA area when we invoke fallocate with FALLOC_FL_COLLAPSE_RANGE flag.
Signed-off-by: Chao Yu <chao2.yu@...sung.com>
---
fs/f2fs/f2fs.h | 4 ++--
fs/f2fs/recovery.c | 2 +-
fs/f2fs/segment.c | 33 ++++++++++++++++++++++++++-------
3 files changed, 29 insertions(+), 10 deletions(-)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 8be6cab..7ab06e8 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1560,8 +1560,8 @@ void write_node_page(struct f2fs_sb_info *, struct page *,
void write_data_page(struct page *, struct dnode_of_data *,
struct f2fs_io_info *);
void rewrite_data_page(struct page *, struct f2fs_io_info *);
-void recover_data_page(struct f2fs_sb_info *, struct page *,
- struct f2fs_summary *, block_t, block_t);
+void replace_block(struct f2fs_sb_info *, struct f2fs_summary *,
+ block_t, block_t, bool);
void allocate_data_block(struct f2fs_sb_info *, struct page *,
block_t, block_t *, struct f2fs_summary *, int);
void f2fs_wait_on_page_writeback(struct page *, enum page_type);
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index b80d9d4..703ab2f 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -412,7 +412,7 @@ static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
set_summary(&sum, dn.nid, dn.ofs_in_node, ni.version);
/* write dummy data page */
- recover_data_page(sbi, NULL, &sum, src, dest);
+ replace_block(sbi, &sum, src, dest, true);
dn.data_blkaddr = dest;
set_data_blkaddr(&dn);
f2fs_update_extent_cache(&dn);
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index f939660..3db92fe 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1258,26 +1258,34 @@ void rewrite_data_page(struct page *page, struct f2fs_io_info *fio)
f2fs_submit_page_mbio(F2FS_P_SB(page), page, fio);
}
-void recover_data_page(struct f2fs_sb_info *sbi,
- struct page *page, struct f2fs_summary *sum,
- block_t old_blkaddr, block_t new_blkaddr)
+void replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
+ block_t old_blkaddr, block_t new_blkaddr,
+ bool recover_curseg)
{
struct sit_info *sit_i = SIT_I(sbi);
struct curseg_info *curseg;
unsigned int segno, old_cursegno;
struct seg_entry *se;
int type;
+ unsigned short old_blkoff;
segno = GET_SEGNO(sbi, new_blkaddr);
se = get_seg_entry(sbi, segno);
type = se->type;
- if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) {
- if (old_blkaddr == NULL_ADDR)
- type = CURSEG_COLD_DATA;
- else
+ if (recover_curseg) {
+ /* for recovery flow */
+ if (se->valid_blocks == 0 && !IS_CURSEG(sbi, segno)) {
+ if (old_blkaddr == NULL_ADDR)
+ type = CURSEG_COLD_DATA;
+ else
+ type = CURSEG_WARM_DATA;
+ }
+ } else {
+ if (!IS_CURSEG(sbi, segno))
type = CURSEG_WARM_DATA;
}
+
curseg = CURSEG_I(sbi, type);
mutex_lock(&curseg->curseg_mutex);
@@ -1289,6 +1297,10 @@ void recover_data_page(struct f2fs_sb_info *sbi,
if (segno != curseg->segno) {
curseg->next_segno = segno;
change_curseg(sbi, type, true);
+ recover_curseg = true;
+ } else {
+ old_blkoff = curseg->next_blkoff;
+ recover_curseg = false;
}
curseg->next_blkoff = GET_BLKOFF_FROM_SEG0(sbi, new_blkaddr);
@@ -1297,6 +1309,13 @@ void recover_data_page(struct f2fs_sb_info *sbi,
refresh_sit_entry(sbi, old_blkaddr, new_blkaddr);
locate_dirty_segment(sbi, old_cursegno);
+ if (recover_curseg) {
+ curseg->next_segno = old_cursegno;
+ change_curseg(sbi, type, true);
+ } else {
+ curseg->next_blkoff = old_blkoff;
+ }
+
mutex_unlock(&sit_i->sentry_lock);
mutex_unlock(&curseg->curseg_mutex);
}
--
2.3.3
--
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