diff options
Diffstat (limited to 'include/f2fs_fs.h')
| -rw-r--r-- | include/f2fs_fs.h | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/include/f2fs_fs.h b/include/f2fs_fs.h index 8c7c4ce..40b665d 100644 --- a/include/f2fs_fs.h +++ b/include/f2fs_fs.h @@ -745,6 +745,13 @@ struct summary_footer { sizeof(struct sit_journal_entry)) #define SIT_JOURNAL_RESERVED ((SUM_JOURNAL_SIZE - 2) %\ sizeof(struct sit_journal_entry)) + +/* + * Reserved area should make size of f2fs_extra_info equals to + * that of nat_journal and sit_journal. + */ +#define EXTRA_INFO_RESERVED (SUM_JOURNAL_SIZE - 2 - 8) + /* * frequently updated NAT/SIT entries can be stored in the spare area in * summary blocks @@ -774,18 +781,28 @@ struct sit_journal { __u8 reserved[SIT_JOURNAL_RESERVED]; } __attribute__((packed)); -/* 4KB-sized summary block structure */ -struct f2fs_summary_block { - struct f2fs_summary entries[ENTRIES_IN_SUM]; +struct f2fs_extra_info { + __le64 kbytes_written; + __u8 reserved[EXTRA_INFO_RESERVED]; +} __attribute__((packed)); + +struct f2fs_journal { union { __le16 n_nats; __le16 n_sits; }; - /* spare area is used by NAT or SIT journals */ + /* spare area is used by NAT or SIT journals or extra info */ union { struct nat_journal nat_j; struct sit_journal sit_j; + struct f2fs_extra_info info; }; +} __attribute__((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; } __attribute__((packed)); |