diff options
Diffstat (limited to 'include/linux/f2fs_fs.h')
| -rw-r--r-- | include/linux/f2fs_fs.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h index e59c3be92106..67aa01df777d 100644 --- a/include/linux/f2fs_fs.h +++ b/include/linux/f2fs_fs.h @@ -358,6 +358,12 @@ 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 @@ -387,6 +393,11 @@ struct sit_journal { __u8 reserved[SIT_JOURNAL_RESERVED]; } __packed; +struct f2fs_extra_info { + __le64 kbytes_written; + __u8 reserved[EXTRA_INFO_RESERVED]; +} __packed; + /* 4KB-sized summary block structure */ struct f2fs_summary_block { struct f2fs_summary entries[ENTRIES_IN_SUM]; @@ -394,10 +405,11 @@ struct f2fs_summary_block { __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; }; struct summary_footer footer; } __packed; |