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Date:   Fri, 14 Feb 2020 17:44:12 +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 3/4] f2fs: clean up lfs/adaptive mount option

This patch removes F2FS_MOUNT_ADAPTIVE and F2FS_MOUNT_LFS mount options,
and add F2FS_OPTION.fs_mode with below two status to indicate filesystem
mode.

enum {
	FS_MODE_ADAPTIVE,	/* use both lfs/ssr allocation */
	FS_MODE_LFS,		/* use lfs allocation only */
};

It can enhance code readability and fs mode's scalability.

Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
 fs/f2fs/data.c    |  8 ++++----
 fs/f2fs/f2fs.h    | 27 ++++++++++-----------------
 fs/f2fs/file.c    |  2 +-
 fs/f2fs/gc.c      |  2 +-
 fs/f2fs/segment.c | 12 ++++++------
 fs/f2fs/super.c   | 16 ++++++++--------
 6 files changed, 30 insertions(+), 37 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index ec4b030e2466..019c91f7b301 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -445,7 +445,7 @@ static inline void __submit_bio(struct f2fs_sb_info *sbi,
 		if (type != DATA && type != NODE)
 			goto submit_io;
 
-		if (test_opt(sbi, LFS) && current->plug)
+		if (f2fs_lfs_mode(sbi) && current->plug)
 			blk_finish_plug(current->plug);
 
 		if (F2FS_IO_ALIGNED(sbi))
@@ -1420,7 +1420,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
 	end = pgofs + maxblocks;
 
 	if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
-		if (test_opt(sbi, LFS) && flag == F2FS_GET_BLOCK_DIO &&
+		if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
 							map->m_may_create)
 			goto next_dnode;
 
@@ -1475,7 +1475,7 @@ int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
 
 	if (__is_valid_data_blkaddr(blkaddr)) {
 		/* use out-place-update for driect IO under LFS mode */
-		if (test_opt(sbi, LFS) && flag == F2FS_GET_BLOCK_DIO &&
+		if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
 							map->m_may_create) {
 			err = __allocate_data_block(&dn, map->m_seg_type);
 			if (err)
@@ -2403,7 +2403,7 @@ bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 
-	if (test_opt(sbi, LFS))
+	if (f2fs_lfs_mode(sbi))
 		return true;
 	if (S_ISDIR(inode->i_mode))
 		return true;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 5152e9bf432b..d2d50827772c 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -91,8 +91,6 @@ extern const char *f2fs_fault_name[FAULT_MAX];
 #define F2FS_MOUNT_FORCE_FG_GC		0x00004000
 #define F2FS_MOUNT_DATA_FLUSH		0x00008000
 #define F2FS_MOUNT_FAULT_INJECTION	0x00010000
-#define F2FS_MOUNT_ADAPTIVE		0x00020000
-#define F2FS_MOUNT_LFS			0x00040000
 #define F2FS_MOUNT_USRQUOTA		0x00080000
 #define F2FS_MOUNT_GRPQUOTA		0x00100000
 #define F2FS_MOUNT_PRJQUOTA		0x00200000
@@ -138,6 +136,7 @@ struct f2fs_mount_info {
 	int whint_mode;
 	int alloc_mode;			/* segment allocation policy */
 	int fsync_mode;			/* fsync policy */
+	int fs_mode;			/* fs mode: LFS or ADAPTIVE */
 	bool test_dummy_encryption;	/* test dummy encryption */
 	block_t unusable_cap;		/* Amount of space allowed to be
 					 * unusable when disabling checkpoint
@@ -1171,6 +1170,11 @@ enum {
 	GC_URGENT,
 };
 
+enum {
+	FS_MODE_ADAPTIVE,	/* use both lfs/ssr allocation */
+	FS_MODE_LFS,		/* use lfs allocation only */
+};
+
 enum {
 	WHINT_MODE_OFF,		/* not pass down write hints */
 	WHINT_MODE_USER,	/* try to pass down hints given by users */
@@ -3907,20 +3911,9 @@ static inline bool f2fs_hw_is_readonly(struct f2fs_sb_info *sbi)
 	return false;
 }
 
-
-static inline void set_opt_mode(struct f2fs_sb_info *sbi, unsigned int mt)
+static inline bool f2fs_lfs_mode(struct f2fs_sb_info *sbi)
 {
-	clear_opt(sbi, ADAPTIVE);
-	clear_opt(sbi, LFS);
-
-	switch (mt) {
-	case F2FS_MOUNT_ADAPTIVE:
-		set_opt(sbi, ADAPTIVE);
-		break;
-	case F2FS_MOUNT_LFS:
-		set_opt(sbi, LFS);
-		break;
-	}
+	return F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS;
 }
 
 static inline bool f2fs_may_encrypt(struct inode *inode)
@@ -3975,7 +3968,7 @@ static inline int allow_outplace_dio(struct inode *inode,
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 	int rw = iov_iter_rw(iter);
 
-	return (test_opt(sbi, LFS) && (rw == WRITE) &&
+	return (f2fs_lfs_mode(sbi) && (rw == WRITE) &&
 				!block_unaligned_IO(inode, iocb, iter));
 }
 
@@ -3997,7 +3990,7 @@ static inline bool f2fs_force_buffered_io(struct inode *inode,
 	 */
 	if (f2fs_sb_has_blkzoned(sbi))
 		return true;
-	if (test_opt(sbi, LFS) && (rw == WRITE)) {
+	if (f2fs_lfs_mode(sbi) && (rw == WRITE)) {
 		if (block_unaligned_IO(inode, iocb, iter))
 			return true;
 		if (F2FS_IO_ALIGNED(sbi))
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 5a0f84751091..efca4ed17b7d 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1132,7 +1132,7 @@ static int __read_out_blkaddrs(struct inode *inode, block_t *blkaddr,
 
 		if (!f2fs_is_checkpointed_data(sbi, *blkaddr)) {
 
-			if (test_opt(sbi, LFS)) {
+			if (f2fs_lfs_mode(sbi)) {
 				f2fs_put_dnode(&dn);
 				return -EOPNOTSUPP;
 			}
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 53312d7bc78b..8aebe2b9c655 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -762,7 +762,7 @@ static int move_data_block(struct inode *inode, block_t bidx,
 	struct page *page, *mpage;
 	block_t newaddr;
 	int err = 0;
-	bool lfs_mode = test_opt(fio.sbi, LFS);
+	bool lfs_mode = f2fs_lfs_mode(fio.sbi);
 
 	/* do not read out */
 	page = f2fs_grab_cache_page(inode->i_mapping, bidx, false);
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index cf0eb002cfd4..c3252603ff79 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -172,7 +172,7 @@ bool f2fs_need_SSR(struct f2fs_sb_info *sbi)
 	int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS);
 	int imeta_secs = get_blocktype_secs(sbi, F2FS_DIRTY_IMETA);
 
-	if (test_opt(sbi, LFS))
+	if (f2fs_lfs_mode(sbi))
 		return false;
 	if (sbi->gc_mode == GC_URGENT)
 		return true;
@@ -1940,7 +1940,7 @@ void f2fs_clear_prefree_segments(struct f2fs_sb_info *sbi,
 	unsigned int start = 0, end = -1;
 	unsigned int secno, start_segno;
 	bool force = (cpc->reason & CP_DISCARD);
-	bool need_align = test_opt(sbi, LFS) && __is_large_section(sbi);
+	bool need_align = f2fs_lfs_mode(sbi) && __is_large_section(sbi);
 
 	mutex_lock(&dirty_i->seglist_lock);
 
@@ -1972,7 +1972,7 @@ void f2fs_clear_prefree_segments(struct f2fs_sb_info *sbi,
 					(end - 1) <= cpc->trim_end)
 				continue;
 
-		if (!test_opt(sbi, LFS) || !__is_large_section(sbi)) {
+		if (!f2fs_lfs_mode(sbi) || !__is_large_section(sbi)) {
 			f2fs_issue_discard(sbi, START_BLOCK(sbi, start),
 				(end - start) << sbi->log_blocks_per_seg);
 			continue;
@@ -2830,7 +2830,7 @@ int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
 	struct discard_policy dpolicy;
 	unsigned long long trimmed = 0;
 	int err = 0;
-	bool need_align = test_opt(sbi, LFS) && __is_large_section(sbi);
+	bool need_align = f2fs_lfs_mode(sbi) && __is_large_section(sbi);
 
 	if (start >= MAX_BLKADDR(sbi) || range->len < sbi->blocksize)
 		return -EINVAL;
@@ -3193,7 +3193,7 @@ static void update_device_state(struct f2fs_io_info *fio)
 static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio)
 {
 	int type = __get_segment_type(fio);
-	bool keep_order = (test_opt(fio->sbi, LFS) && type == CURSEG_COLD_DATA);
+	bool keep_order = (f2fs_lfs_mode(fio->sbi) && type == CURSEG_COLD_DATA);
 
 	if (keep_order)
 		down_read(&fio->sbi->io_order_lock);
@@ -4678,7 +4678,7 @@ int f2fs_build_segment_manager(struct f2fs_sb_info *sbi)
 	if (sm_info->rec_prefree_segments > DEF_MAX_RECLAIM_PREFREE_SEGMENTS)
 		sm_info->rec_prefree_segments = DEF_MAX_RECLAIM_PREFREE_SEGMENTS;
 
-	if (!test_opt(sbi, LFS))
+	if (!f2fs_lfs_mode(sbi))
 		sm_info->ipu_policy = 1 << F2FS_IPU_FSYNC;
 	sm_info->min_ipu_util = DEF_MIN_IPU_UTIL;
 	sm_info->min_fsync_blocks = DEF_MIN_FSYNC_BLOCKS;
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 65a7a432dfee..427409eff354 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -600,10 +600,10 @@ static int parse_options(struct super_block *sb, char *options)
 					kvfree(name);
 					return -EINVAL;
 				}
-				set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
+				F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 			} else if (strlen(name) == 3 &&
 					!strncmp(name, "lfs", 3)) {
-				set_opt_mode(sbi, F2FS_MOUNT_LFS);
+				F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 			} else {
 				kvfree(name);
 				return -EINVAL;
@@ -904,7 +904,7 @@ static int parse_options(struct super_block *sb, char *options)
 	}
 #endif
 
-	if (F2FS_IO_SIZE_BITS(sbi) && !test_opt(sbi, LFS)) {
+	if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
 		f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
 			 F2FS_IO_SIZE_KB(sbi));
 		return -EINVAL;
@@ -934,7 +934,7 @@ static int parse_options(struct super_block *sb, char *options)
 		}
 	}
 
-	if (test_opt(sbi, DISABLE_CHECKPOINT) && test_opt(sbi, LFS)) {
+	if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
 		f2fs_err(sbi, "LFS not compatible with checkpoint=disable\n");
 		return -EINVAL;
 	}
@@ -1497,9 +1497,9 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
 		seq_puts(seq, ",data_flush");
 
 	seq_puts(seq, ",mode=");
-	if (test_opt(sbi, ADAPTIVE))
+	if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
 		seq_puts(seq, "adaptive");
-	else if (test_opt(sbi, LFS))
+	else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
 		seq_puts(seq, "lfs");
 	seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
 	if (test_opt(sbi, RESERVE_ROOT))
@@ -1586,9 +1586,9 @@ static void default_options(struct f2fs_sb_info *sbi)
 	set_opt(sbi, FLUSH_MERGE);
 	set_opt(sbi, DISCARD);
 	if (f2fs_sb_has_blkzoned(sbi))
-		set_opt_mode(sbi, F2FS_MOUNT_LFS);
+		F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
 	else
-		set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
+		F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
 
 #ifdef CONFIG_F2FS_FS_XATTR
 	set_opt(sbi, XATTR_USER);
-- 
2.18.0.rc1

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