With this newly introduced interface, user can get block number compression saved in target inode.
Signed-off-by: Chao Yu <[email protected]> --- fs/f2fs/f2fs.h | 1 + fs/f2fs/file.c | 18 ++++++++++++++++++ 2 files changed, 19 insertions(+) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 5d047c0bbbbb..15199df5d40a 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -426,6 +426,7 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal, #define F2FS_IOC_GET_PIN_FILE _IOR(F2FS_IOCTL_MAGIC, 14, __u32) #define F2FS_IOC_PRECACHE_EXTENTS _IO(F2FS_IOCTL_MAGIC, 15) #define F2FS_IOC_RESIZE_FS _IOW(F2FS_IOCTL_MAGIC, 16, __u64) +#define F2FS_IOC_GET_COMPRESS_BLOCKS _IOR(F2FS_IOCTL_MAGIC, 17, __u64) #define F2FS_IOC_GET_VOLUME_NAME FS_IOC_GETFSLABEL #define F2FS_IOC_SET_VOLUME_NAME FS_IOC_SETFSLABEL diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index efca4ed17b7d..235708c892af 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -3401,6 +3401,21 @@ static int f2fs_set_volume_name(struct file *filp, unsigned long arg) return err; } +static int f2fs_get_compress_blocks(struct file *filp, unsigned long arg) +{ + struct inode *inode = file_inode(filp); + __u64 blocks; + + if (!f2fs_sb_has_compression(F2FS_I_SB(inode))) + return -EOPNOTSUPP; + + if (!f2fs_compressed_file(inode)) + return -EINVAL; + + blocks = F2FS_I(inode)->i_compr_blocks; + return put_user(blocks, (u64 __user *)arg); +} + long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp))))) @@ -3479,6 +3494,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) return f2fs_get_volume_name(filp, arg); case F2FS_IOC_SET_VOLUME_NAME: return f2fs_set_volume_name(filp, arg); + case F2FS_IOC_GET_COMPRESS_BLOCKS: + return f2fs_get_compress_blocks(filp, arg); default: return -ENOTTY; } @@ -3636,6 +3653,7 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) case FS_IOC_MEASURE_VERITY: case F2FS_IOC_GET_VOLUME_NAME: case F2FS_IOC_SET_VOLUME_NAME: + case F2FS_IOC_GET_COMPRESS_BLOCKS: break; default: return -ENOIOCTLCMD; -- 2.18.0.rc1 _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
