Commit 119ee914 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: split UMOUNT and FASTBOOT flags 



This patch adds FASTBOOT flag into checkpoint as follows.

 - CP_UMOUNT_FLAG is set when system is umounted.
 - CP_FASTBOOT_FLAG is set when intermediate checkpoint having node summaries
   was done.

So, if you get CP_UMOUNT_FLAG from checkpoint, the system was umounted cleanly.
Instead, if there was sudden-power-off, you can get CP_FASTBOOT_FLAG or nothing.

Reviewed-by: default avatarChao Yu <chao2.yu@samsung.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 11504a8e

fs/f2fs/checkpoint.c

+13 −6
Original line number Diff line number Diff line
@@ -956,17 +956,24 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc) 
	ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +

			orphan_blocks);



	if (cpc->reason == CP_UMOUNT) {

		set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);

	if (__remain_node_summaries(cpc->reason))

		ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+

				cp_payload_blks + data_sum_blocks +

				orphan_blocks + NR_CURSEG_NODE_TYPE);

	} else {

		clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);

	else

		ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +

				cp_payload_blks + data_sum_blocks +

				orphan_blocks);

	}



	if (cpc->reason == CP_UMOUNT)

		set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);

	else

		clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);



	if (cpc->reason == CP_FASTBOOT)

		set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);

	else

		clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);



	if (orphan_num)

		set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
@@ -1010,7 +1017,7 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc) 


	write_data_summaries(sbi, start_blk);

	start_blk += data_sum_blocks;

	if (cpc->reason == CP_UMOUNT) {

	if (__remain_node_summaries(cpc->reason)) {

		write_node_summaries(sbi, start_blk);

		start_blk += NR_CURSEG_NODE_TYPE;

	}

fs/f2fs/f2fs.h

+23 −0
Original line number Diff line number Diff line
@@ -100,6 +100,7 @@ enum { 


enum {

	CP_UMOUNT,

	CP_FASTBOOT,

	CP_SYNC,

	CP_DISCARD,

};
@@ -764,6 +765,28 @@ static inline void f2fs_unlock_all(struct f2fs_sb_info *sbi) 
	up_write(&sbi->cp_rwsem);

}



static inline int __get_cp_reason(struct f2fs_sb_info *sbi)

{

	int reason = CP_SYNC;



	if (test_opt(sbi, FASTBOOT))

		reason = CP_FASTBOOT;

	if (is_sbi_flag_set(sbi, SBI_IS_CLOSE))

		reason = CP_UMOUNT;

	return reason;

}



static inline bool __remain_node_summaries(int reason)

{

	return (reason == CP_UMOUNT || reason == CP_FASTBOOT);

}



static inline bool __exist_node_summaries(struct f2fs_sb_info *sbi)

{

	return (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG) ||

			is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FASTBOOT_FLAG));

}



/*

 * Check whether the given nid is within node id range.

 */

fs/f2fs/gc.c

+1 −2
Original line number Diff line number Diff line
@@ -698,8 +698,7 @@ int f2fs_gc(struct f2fs_sb_info *sbi) 
		.iroot = RADIX_TREE_INIT(GFP_NOFS),

	};



	cpc.reason = test_opt(sbi, FASTBOOT) ? CP_UMOUNT : CP_SYNC;



	cpc.reason = __get_cp_reason(sbi);

gc_more:

	if (unlikely(!(sbi->sb->s_flags & MS_ACTIVE)))

		goto stop;

fs/f2fs/segment.c

+5 −6
Original line number Diff line number Diff line
@@ -1401,7 +1401,7 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type) 
		segno = le32_to_cpu(ckpt->cur_data_segno[type]);

		blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type -

							CURSEG_HOT_DATA]);

		if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG))

		if (__exist_node_summaries(sbi))

			blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type);

		else

			blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type);
@@ -1410,7 +1410,7 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type) 
							CURSEG_HOT_NODE]);

		blk_off = le16_to_cpu(ckpt->cur_node_blkoff[type -

							CURSEG_HOT_NODE]);

		if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG))

		if (__exist_node_summaries(sbi))

			blk_addr = sum_blk_addr(sbi, NR_CURSEG_NODE_TYPE,

							type - CURSEG_HOT_NODE);

		else
@@ -1421,7 +1421,7 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type) 
	sum = (struct f2fs_summary_block *)page_address(new);



	if (IS_NODESEG(type)) {

		if (is_set_ckpt_flags(ckpt, CP_UMOUNT_FLAG)) {

		if (__exist_node_summaries(sbi)) {

			struct f2fs_summary *ns = &sum->entries[0];

			int i;

			for (i = 0; i < sbi->blocks_per_seg; i++, ns++) {
@@ -1470,7 +1470,7 @@ static int restore_curseg_summaries(struct f2fs_sb_info *sbi) 
		type = CURSEG_HOT_NODE;

	}



	if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG))

	if (__exist_node_summaries(sbi))

		ra_meta_pages(sbi, sum_blk_addr(sbi, NR_CURSEG_TYPE, type),

					NR_CURSEG_TYPE - type, META_CP);
@@ -1567,7 +1567,6 @@ void write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk) 


void write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)

{

	if (is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG))

	write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE);

}

fs/f2fs/super.c

+2 −3
Original line number Diff line number Diff line
@@ -500,9 +500,8 @@ int f2fs_sync_fs(struct super_block *sb, int sync) 
	if (sync) {

		struct cp_control cpc;



		cpc.reason = (test_opt(sbi, FASTBOOT) ||

					is_sbi_flag_set(sbi, SBI_IS_CLOSE)) ?

						CP_UMOUNT : CP_SYNC;

		cpc.reason = __get_cp_reason(sbi);



		mutex_lock(&sbi->gc_mutex);

		write_checkpoint(sbi, &cpc);

		mutex_unlock(&sbi->gc_mutex);

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