[PATCH 5.15 259/317] f2fs: invalidate meta pages only for post_read required inode

Sasha Levin
2024-03-24T23:39:12Z

From: Chao Yu <chao@kernel.org>

[ Upstream commit 0d5b9d8156396bbe1c982708b38ab9e188c45ec9 ]

After commit e3b49ea36802 ("f2fs: invalidate META_MAPPING before
IPU/DIO write"), invalidate_mapping_pages() will be called to
avoid race condition in between IPU/DIO and readahead for GC.

However, readahead flow is only used for post_read required inode,
so this patch adds check condition to avoids unnecessary page cache
invalidating for non-post_read inode.

Signed-off-by: Chao Yu <chao.yu@oppo.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Stable-dep-of: fd244524c2cf ("f2fs: compress: fix to cover normal cluster write with cp_rwsem")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/f2fs/data.c | 8 ++------
fs/f2fs/f2fs.h | 1 +
fs/f2fs/segment.c | 9 ++++++++-
3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 222af7d5f91b7..4f122a806cf88 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1496,12 +1496,9 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
*map->m_next_extent = pgofs + map->m_len;

/* for hardware encryption, but to avoid potential issue in future */
- if (flag == F2FS_GET_BLOCK_DIO) {
+ if (flag == F2FS_GET_BLOCK_DIO)
f2fs_wait_on_block_writeback_range(inode,
map->m_pblk, map->m_len);
- invalidate_mapping_pages(META_MAPPING(sbi),
- map->m_pblk, map->m_pblk + map->m_len - 1);
- }

if (map->m_multidev_dio) {
block_t blk_addr = map->m_pblk;
@@ -1714,8 +1711,6 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
*/
f2fs_wait_on_block_writeback_range(inode,
map->m_pblk, map->m_len);
- invalidate_mapping_pages(META_MAPPING(sbi),
- map->m_pblk, map->m_pblk + map->m_len - 1);

if (map->m_multidev_dio) {
block_t blk_addr = map->m_pblk;
@@ -2808,6 +2803,7 @@ int f2fs_write_single_data_page(struct page *page, int *submitted,
.submitted = false,
.compr_blocks = compr_blocks,
.need_lock = LOCK_RETRY,
+ .post_read = f2fs_post_read_required(inode),
.io_type = io_type,
.io_wbc = wbc,
.bio = bio,
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index dfaee211f6133..d961a2779b6e7 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1177,6 +1177,7 @@ struct f2fs_io_info {
bool retry; /* need to reallocate block address */
int compr_blocks; /* # of compressed block addresses */
bool encrypted; /* indicate file is encrypted */
+ bool post_read; /* require post read */
enum iostat_type io_type; /* io type */
struct writeback_control *io_wbc; /* writeback control */
struct bio **bio; /* bio for ipu */
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index cbdd8d0ec8960..43fabd17bb4e7 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -3620,7 +3620,8 @@ int f2fs_inplace_write_data(struct f2fs_io_info *fio)
goto drop_bio;
}

- invalidate_mapping_pages(META_MAPPING(sbi),
+ if (fio->post_read)
+ invalidate_mapping_pages(META_MAPPING(sbi),
fio->new_blkaddr, fio->new_blkaddr);

stat_inc_inplace_blocks(fio->sbi);
@@ -3803,10 +3804,16 @@ void f2fs_wait_on_block_writeback(struct inode *inode, block_t blkaddr)
void f2fs_wait_on_block_writeback_range(struct inode *inode, block_t blkaddr,
block_t len)
{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
block_t i;

+ if (!f2fs_post_read_required(inode))
+ return;
+
for (i = 0; i < len; i++)
f2fs_wait_on_block_writeback(inode, blkaddr + i);
+
+ invalidate_mapping_pages(META_MAPPING(sbi), blkaddr, blkaddr + len - 1);
}

static int read_compacted_summaries(struct f2fs_sb_info *sbi)
--
2.43.0