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Message-ID: <20200214184150.GB60913@google.com>
Date: Fri, 14 Feb 2020 10:41:50 -0800
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: Chao Yu <yuchao0@...wei.com>
Cc: linux-f2fs-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org, chao@...nel.org
Subject: Re: [PATCH 3/4] f2fs: clean up lfs/adaptive mount option
On 02/14, Chao Yu wrote:
> 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
I don't think we can remove this simply.
> #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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