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| author |   Jaegeuk Kim <jaegeuk@kernel.org> | 2015-04-13 15:10:36 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-05-28 15:41:28 -0700 |
| commit | 76f105a2dbcd47509bac6ba8d94cb3759a3e6e9d (patch) | |
| tree | 123117eb19f5c4b7b21ad8be6679e1b778c4b184 | |
| parent | f2fs: move existing definitions into f2fs.h (diff) | |
| download | wireguard-linux-76f105a2dbcd47509bac6ba8d94cb3759a3e6e9d.tar.xz wireguard-linux-76f105a2dbcd47509bac6ba8d94cb3759a3e6e9d.zip | |
f2fs: add feature facility in superblock
This patch introduces a feature in superblock, which will indicate any new
features for f2fs.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | fs/f2fs/f2fs.h | 7 | ||||
| -rw-r--r-- | include/linux/f2fs_fs.h | 3 |
2 files changed, 9 insertions, 1 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index cd9748af1b63..e1dd986262cb 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -70,6 +70,13 @@ struct f2fs_mount_info { unsigned int opt; }; +#define F2FS_HAS_FEATURE(sb, mask) \ + ((F2FS_SB(sb)->raw_super->feature & cpu_to_le32(mask)) != 0) +#define F2FS_SET_FEATURE(sb, mask) \ + F2FS_SB(sb)->raw_super->feature |= cpu_to_le32(mask) +#define F2FS_CLEAR_FEATURE(sb, mask) \ + F2FS_SB(sb)->raw_super->feature &= ~cpu_to_le32(mask) + #define CRCPOLY_LE 0xedb88320 static inline __u32 f2fs_crc32(void *buf, size_t len) diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h index 8d345c24bcf7..d44e97f2b98e 100644 --- a/include/linux/f2fs_fs.h +++ b/include/linux/f2fs_fs.h @@ -90,7 +90,8 @@ struct f2fs_super_block { __le32 cp_payload; __u8 version[VERSION_LEN]; /* the kernel version */ __u8 init_version[VERSION_LEN]; /* the initial kernel version */ - __u8 reserved[892]; /* valid reserved region */ + __le32 feature; /* defined features */ + __u8 reserved[888]; /* valid reserved region */ } __packed; /* |