diff options
Diffstat (limited to 'kernel/include/linux/f2fs_fs.h')
| -rw-r--r-- | kernel/include/linux/f2fs_fs.h | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/kernel/include/linux/f2fs_fs.h b/kernel/include/linux/f2fs_fs.h index 591f8c3ef..25c6324a0 100644 --- a/kernel/include/linux/f2fs_fs.h +++ b/kernel/include/linux/f2fs_fs.h @@ -50,6 +50,8 @@ #define MAX_ACTIVE_NODE_LOGS 8 #define MAX_ACTIVE_DATA_LOGS 8 +#define VERSION_LEN 256 + /* * For superblock */ @@ -86,6 +88,12 @@ struct f2fs_super_block { __le32 extension_count; /* # of extensions below */ __u8 extension_list[F2FS_MAX_EXTENSION][8]; /* extension array */ __le32 cp_payload; + __u8 version[VERSION_LEN]; /* the kernel version */ + __u8 init_version[VERSION_LEN]; /* the initial kernel version */ + __le32 feature; /* defined features */ + __u8 encryption_level; /* versioning level for encryption */ + __u8 encrypt_pw_salt[16]; /* Salt used for string2key algorithm */ + __u8 reserved[871]; /* valid reserved region */ } __packed; /* @@ -409,15 +417,25 @@ typedef __le32 f2fs_hash_t; #define GET_DENTRY_SLOTS(x) ((x + F2FS_SLOT_LEN - 1) >> F2FS_SLOT_LEN_BITS) -/* the number of dentry in a block */ -#define NR_DENTRY_IN_BLOCK 214 - /* MAX level for dir lookup */ #define MAX_DIR_HASH_DEPTH 63 /* MAX buckets in one level of dir */ #define MAX_DIR_BUCKETS (1 << ((MAX_DIR_HASH_DEPTH / 2) - 1)) +/* + * space utilization of regular dentry and inline dentry + * regular dentry inline dentry + * bitmap 1 * 27 = 27 1 * 23 = 23 + * reserved 1 * 3 = 3 1 * 7 = 7 + * dentry 11 * 214 = 2354 11 * 182 = 2002 + * filename 8 * 214 = 1712 8 * 182 = 1456 + * total 4096 3488 + * + * Note: there are more reserved space in inline dentry than in regular + * dentry, when converting inline dentry we should handle this carefully. + */ +#define NR_DENTRY_IN_BLOCK 214 /* the number of dentry in a block */ #define SIZE_OF_DIR_ENTRY 11 /* by byte */ #define SIZE_OF_DENTRY_BITMAP ((NR_DENTRY_IN_BLOCK + BITS_PER_BYTE - 1) / \ BITS_PER_BYTE) |