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authorChao Yu <yuchao0@huawei.com>2020-02-21 13:09:21 +0300
committerJaegeuk Kim <jaegeuk@kernel.org>2020-03-19 21:41:26 +0300
commit439dfb106250c853c439be11e92ab719a8707575 (patch)
treea23ea904332162a971351cc5112870626261e7a8 /fs/f2fs
parent0683728adab251d7747ce61279e249944effa78d (diff)
downloadlinux-439dfb106250c853c439be11e92ab719a8707575.tar.xz
f2fs: introduce F2FS_IOC_GET_COMPRESS_BLOCKS
With this newly introduced interface, user can get block number compression saved in target inode. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/f2fs.h1
-rw-r--r--fs/f2fs/file.c18
2 files changed, 19 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 14f7af37ff4b..60e9da1c1c0a 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 b318e4d9f825..9abd6cfe3e5a 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3398,6 +3398,21 @@ out:
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)))))
@@ -3476,6 +3491,8 @@ 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;
}
@@ -3633,6 +3650,7 @@ 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;