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f2fs: introduce f2fs_journal struct to wrap journal info

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Introduce a new structure f2fs_journal to wrap journal info in struct
f2fs_summary_block for readability.

struct f2fs_journal {
	union {
		__le16 n_nats;
		__le16 n_sits;
	};
	union {
		struct nat_journal nat_j;
		struct sit_journal sit_j;
		struct f2fs_extra_info info;
	};
} __packed;

struct f2fs_summary_block {
	struct f2fs_summary entries[ENTRIES_IN_SUM];
	struct f2fs_journal journal;
	struct summary_footer footer;
} __packed;

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu
2016-02-14 18:50:40 +08:00
committed by Jaegeuk Kim
parent 922ec355f8
commit dfc08a12e4
6 changed files with 77 additions and 72 deletions
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10
include/linux/f2fs_fs.h
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@@ -398,9 +398,7 @@ struct f2fs_extra_info {
__u8 reserved[EXTRA_INFO_RESERVED];
} __packed;
/* 4KB-sized summary block structure */
struct f2fs_summary_block {
struct f2fs_summary entries[ENTRIES_IN_SUM];
struct f2fs_journal {
union {
__le16 n_nats;
__le16 n_sits;
@@ -411,6 +409,12 @@ struct f2fs_summary_block {
struct sit_journal sit_j;
struct f2fs_extra_info info;
};
} __packed;
/* 4KB-sized summary block structure */
struct f2fs_summary_block {
struct f2fs_summary entries[ENTRIES_IN_SUM];
struct f2fs_journal journal;
struct summary_footer footer;
} __packed;