Commit "0a007b97aad6"(f2fs: recover directory operations by fsync)
fixed xfstest generic/342 case, but it also increased the written
data and caused the performance degradation. In most cases, there's
no need to do so heavily fsync actually.
So we introduce a new mount option "strict_fsync" to control the
policy of fsync. It's set by default, and means that fsync follows
POSIX semantics. And "nostrict_fsync" means that the behaviour is
in line with xfs, ext4 and btrfs, on which generic/342 will be passed.
Signed-off-by: Junling Zheng <zhengjunl...@huawei.com>
---
fs/f2fs/dir.c | 3 ++-
fs/f2fs/f2fs.h | 1 +
fs/f2fs/file.c | 3 ++-
fs/f2fs/namei.c | 9 ++++++---
fs/f2fs/super.c | 13 +++++++++++++
5 files changed, 24 insertions(+), 5 deletions(-)
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index f00b5ed8c011..7487b7e77a36 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -713,7 +713,8 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry,
struct page *page,
f2fs_update_time(F2FS_I_SB(dir), REQ_TIME);
- add_ino_entry(F2FS_I_SB(dir), dir->i_ino, TRANS_DIR_INO);
+ if (!test_opt(F2FS_I_SB(dir), STRICT_FSYNC))
+ add_ino_entry(F2FS_I_SB(dir), dir->i_ino, TRANS_DIR_INO);
if (f2fs_has_inline_dentry(dir))
return f2fs_delete_inline_entry(dentry, page, dir, inode);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index dbe87c7a266e..8cf914d12f17 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -97,6 +97,7 @@ extern char *fault_name[FAULT_MAX];
#define F2FS_MOUNT_QUOTA 0x00400000
#define F2FS_MOUNT_INLINE_XATTR_SIZE 0x00800000
#define F2FS_MOUNT_RESERVE_ROOT 0x01000000
+#define F2FS_MOUNT_STRICT_FSYNC 0x02000000
#define clear_opt(sbi, option) ((sbi)->mount_opt.opt &= ~F2FS_MOUNT_##option)
#define set_opt(sbi, option) ((sbi)->mount_opt.opt |= F2FS_MOUNT_##option)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 672a542e5464..9b39254f5b48 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -165,7 +165,8 @@ static inline enum cp_reason_type need_do_checkpoint(struct
inode *inode)
cp_reason = CP_FASTBOOT_MODE;
else if (sbi->active_logs == 2)
cp_reason = CP_SPEC_LOG_NUM;
- else if (need_dentry_mark(sbi, inode->i_ino) &&
+ else if (!test_opt(sbi, STRICT_FSYNC) &&
+ need_dentry_mark(sbi, inode->i_ino) &&
exist_written_data(sbi, F2FS_I(inode)->i_pino, TRANS_DIR_INO))
cp_reason = CP_RECOVER_DIR;
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index c4c94c7e9f4f..ef86ae327f91 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -936,7 +936,8 @@ static int f2fs_rename(struct inode *old_dir, struct dentry
*old_dentry,
}
f2fs_i_links_write(old_dir, false);
}
- add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
+ if (!test_opt(sbi, STRICT_FSYNC))
+ add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
f2fs_unlock_op(sbi);
@@ -1091,8 +1092,10 @@ static int f2fs_cross_rename(struct inode *old_dir,
struct dentry *old_dentry,
}
f2fs_mark_inode_dirty_sync(new_dir, false);
- add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
- add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
+ if (!test_opt(sbi, STRICT_FSYNC)) {
+ add_ino_entry(sbi, old_dir->i_ino, TRANS_DIR_INO);
+ add_ino_entry(sbi, new_dir->i_ino, TRANS_DIR_INO);
+ }
f2fs_unlock_op(sbi);
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 7966cf7bfb8e..3066fc9d8985 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -130,6 +130,8 @@ enum {
Opt_jqfmt_vfsv0,
Opt_jqfmt_vfsv1,
Opt_whint,
+ Opt_strict_fsync,
+ Opt_nostrict_fsync,
Opt_err,
};
@@ -184,6 +186,8 @@ static match_table_t f2fs_tokens = {
{Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
{Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
{Opt_whint, "whint_mode=%s"},
+ {Opt_strict_fsync, "strict_fsync"},
+ {Opt_nostrict_fsync, "nostrict_fsync"},
{Opt_err, NULL},
};
@@ -700,6 +704,12 @@ static int parse_options(struct super_block *sb, char
*options)
}
kfree(name);
break;
+ case Opt_strict_fsync:
+ set_opt(sbi, STRICT_FSYNC);
+ break;
+ case Opt_nostrict_fsync:
+ clear_opt(sbi, STRICT_FSYNC);
+ break;
default:
f2fs_msg(sb, KERN_ERR,
"Unrecognized mount option \"%s\" or missing
value",
@@ -1296,6 +1306,9 @@ static void default_options(struct f2fs_sb_info *sbi)
set_opt(sbi, POSIX_ACL);
#endif
+ /* POSIX standard fsync */
+ set_opt(sbi, STRICT_FSYNC);
+
#ifdef CONFIG_F2FS_FAULT_INJECTION
f2fs_build_fault_attr(sbi, 0);
#endif
--
2.15.1
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
