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Date: Wed, 23 Dec 2015 17:50:30 +0800
From: Chao Yu <chao2.yu@...sung.com>
To: Jaegeuk Kim <jaegeuk@...nel.org>
Cc: linux-f2fs-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] f2fs: report error of do_checkpoint
do_checkpoint and write_checkpoint can fail due to reasons like triggering
in a readonly fs or encountering IO error of storage device.
So it's better to report such error info to user, let user be aware of
failure of doing checkpoint.
Signed-off-by: Chao Yu <chao2.yu@...sung.com>
---
fs/f2fs/checkpoint.c | 29 +++++++++++++++++++----------
fs/f2fs/f2fs.h | 2 +-
fs/f2fs/file.c | 5 +++--
fs/f2fs/recovery.c | 2 +-
fs/f2fs/segment.c | 5 +++--
fs/f2fs/super.c | 5 +++--
6 files changed, 30 insertions(+), 18 deletions(-)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index fdd43f7..9cdb161 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -910,7 +910,7 @@ static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
finish_wait(&sbi->cp_wait, &wait);
}
-static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
+static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
{
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
@@ -936,7 +936,7 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
while (get_pages(sbi, F2FS_DIRTY_META)) {
sync_meta_pages(sbi, META, LONG_MAX);
if (unlikely(f2fs_cp_error(sbi)))
- return;
+ return -EIO;
}
next_free_nid(sbi, &last_nid);
@@ -1021,7 +1021,7 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
/* need to wait for end_io results */
wait_on_all_pages_writeback(sbi);
if (unlikely(f2fs_cp_error(sbi)))
- return;
+ return -EIO;
/* write out checkpoint buffer at block 0 */
update_meta_page(sbi, ckpt, start_blk++);
@@ -1049,7 +1049,7 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
wait_on_all_pages_writeback(sbi);
if (unlikely(f2fs_cp_error(sbi)))
- return;
+ return -EIO;
filemap_fdatawait_range(NODE_MAPPING(sbi), 0, LONG_MAX);
filemap_fdatawait_range(META_MAPPING(sbi), 0, LONG_MAX);
@@ -1075,19 +1075,22 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
release_ino_entry(sbi);
if (unlikely(f2fs_cp_error(sbi)))
- return;
+ return -EIO;
clear_prefree_segments(sbi, cpc);
clear_sbi_flag(sbi, SBI_IS_DIRTY);
+
+ return 0;
}
/*
* We guarantee that this checkpoint procedure will not fail.
*/
-void write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
+int write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
{
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
unsigned long long ckpt_ver;
+ int err = 0;
mutex_lock(&sbi->cp_mutex);
@@ -1095,14 +1098,19 @@ void write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
(cpc->reason == CP_FASTBOOT || cpc->reason == CP_SYNC ||
(cpc->reason == CP_DISCARD && !sbi->discard_blks)))
goto out;
- if (unlikely(f2fs_cp_error(sbi)))
+ if (unlikely(f2fs_cp_error(sbi))) {
+ err = -EIO;
goto out;
- if (f2fs_readonly(sbi->sb))
+ }
+ if (f2fs_readonly(sbi->sb)) {
+ err = -EROFS;
goto out;
+ }
trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
- if (block_operations(sbi))
+ err = block_operations(sbi);
+ if (err)
goto out;
trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
@@ -1124,7 +1132,7 @@ void write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
flush_sit_entries(sbi, cpc);
/* unlock all the fs_lock[] in do_checkpoint() */
- do_checkpoint(sbi, cpc);
+ err = do_checkpoint(sbi, cpc);
unblock_operations(sbi);
stat_inc_cp_count(sbi->stat_info);
@@ -1138,6 +1146,7 @@ void write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
out:
mutex_unlock(&sbi->cp_mutex);
+ return err;
}
void init_ino_entry_info(struct f2fs_sb_info *sbi)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 0f4d329..0d23962 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1838,7 +1838,7 @@ void update_dirty_page(struct inode *, struct page *);
void add_dirty_dir_inode(struct inode *);
void remove_dirty_inode(struct inode *);
void sync_dirty_inodes(struct f2fs_sb_info *, enum inode_type);
-void write_checkpoint(struct f2fs_sb_info *, struct cp_control *);
+int write_checkpoint(struct f2fs_sb_info *, struct cp_control *);
void init_ino_entry_info(struct f2fs_sb_info *);
int __init create_checkpoint_caches(void);
void destroy_checkpoint_caches(void);
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index f56023d..2e3d797 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1620,6 +1620,7 @@ static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct cp_control cpc;
int flush_data;
+ int err;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -1636,10 +1637,10 @@ static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)
cpc.reason = __get_cp_reason(sbi);
mutex_lock(&sbi->gc_mutex);
- write_checkpoint(sbi, &cpc);
+ err = write_checkpoint(sbi, &cpc);
mutex_unlock(&sbi->gc_mutex);
- return 0;
+ return err;
}
static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 7fcb6e4..589b20b 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -623,7 +623,7 @@ out:
.reason = CP_RECOVERY,
};
mutex_unlock(&sbi->cp_mutex);
- write_checkpoint(sbi, &cpc);
+ err = write_checkpoint(sbi, &cpc);
} else {
mutex_unlock(&sbi->cp_mutex);
}
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index c247450..a3474ba 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1118,6 +1118,7 @@ int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
__u64 end = start + F2FS_BYTES_TO_BLK(range->len) - 1;
unsigned int start_segno, end_segno;
struct cp_control cpc;
+ int err = 0;
if (start >= MAX_BLKADDR(sbi) || range->len < sbi->blocksize)
return -EINVAL;
@@ -1148,12 +1149,12 @@ int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
sbi->segs_per_sec) - 1, end_segno);
mutex_lock(&sbi->gc_mutex);
- write_checkpoint(sbi, &cpc);
+ err = write_checkpoint(sbi, &cpc);
mutex_unlock(&sbi->gc_mutex);
}
out:
range->len = F2FS_BLK_TO_BYTES(cpc.trimmed);
- return 0;
+ return err;
}
static bool __has_curseg_space(struct f2fs_sb_info *sbi, int type)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index c3070c1..597b533 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -579,6 +579,7 @@ static void f2fs_put_super(struct super_block *sb)
int f2fs_sync_fs(struct super_block *sb, int sync)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
+ int err = 0;
trace_f2fs_sync_fs(sb, sync);
@@ -588,14 +589,14 @@ int f2fs_sync_fs(struct super_block *sb, int sync)
cpc.reason = __get_cp_reason(sbi);
mutex_lock(&sbi->gc_mutex);
- write_checkpoint(sbi, &cpc);
+ err = write_checkpoint(sbi, &cpc);
mutex_unlock(&sbi->gc_mutex);
} else {
f2fs_balance_fs(sbi);
}
f2fs_trace_ios(NULL, 1);
- return 0;
+ return err;
}
static int f2fs_freeze(struct super_block *sb)
--
2.6.3
--
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