diff options
| author | Daeho Jeong <daehojeong@google.com> | 2020-10-30 13:10:34 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2020-11-02 17:34:00 -0800 |
| commit | 9e2a5f8cfb4d9371783e21e27bba4338401f1260 (patch) | |
| tree | 269020f8682cd2626b966be54623b4bb9a72466f /fs/f2fs | |
| parent | fa4320cefb8537a70cc28c55d311a1f569697cd3 (diff) | |
f2fs: add F2FS_IOC_GET_COMPRESS_OPTION ioctl
Added a new F2FS_IOC_GET_COMPRESS_OPTION ioctl to get file compression
option of a file.
struct f2fs_comp_option {
u8 algorithm; => compression algorithm
=> 0:lzo, 1:lz4, 2:zstd, 3:lzorle
u8 log_cluster_size; => log scale cluster size
=> 2 ~ 8
};
struct f2fs_comp_option option;
ioctl(fd, F2FS_IOC_GET_COMPRESS_OPTION, &option);
Signed-off-by: Daeho Jeong <daehojeong@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/file.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 89c451f09344..c747f5dd595c 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -3945,6 +3945,33 @@ err: return ret; } +static int f2fs_ioc_get_compress_option(struct file *filp, unsigned long arg) +{ + struct inode *inode = file_inode(filp); + struct f2fs_comp_option option; + + if (!f2fs_sb_has_compression(F2FS_I_SB(inode))) + return -EOPNOTSUPP; + + inode_lock_shared(inode); + + if (!f2fs_compressed_file(inode)) { + inode_unlock_shared(inode); + return -ENODATA; + } + + option.algorithm = F2FS_I(inode)->i_compress_algorithm; + option.log_cluster_size = F2FS_I(inode)->i_log_cluster_size; + + inode_unlock_shared(inode); + + if (copy_to_user((struct f2fs_comp_option __user *)arg, &option, + sizeof(option))) + return -EFAULT; + + return 0; +} + long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp))))) @@ -4033,6 +4060,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) return f2fs_reserve_compress_blocks(filp, arg); case F2FS_IOC_SEC_TRIM_FILE: return f2fs_sec_trim_file(filp, arg); + case F2FS_IOC_GET_COMPRESS_OPTION: + return f2fs_ioc_get_compress_option(filp, arg); default: return -ENOTTY; } @@ -4203,6 +4232,7 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) case F2FS_IOC_RELEASE_COMPRESS_BLOCKS: case F2FS_IOC_RESERVE_COMPRESS_BLOCKS: case F2FS_IOC_SEC_TRIM_FILE: + case F2FS_IOC_GET_COMPRESS_OPTION: break; default: return -ENOIOCTLCMD; |