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Commit d49f3e89 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: add F2FS_IOC_GETVERSION support 



In this patch we add the FS_IOC_GETVERSION ioctl for getting i_generation from
inode, after that, users can list file's generation number by using "lsattr -v".

Signed-off-by: default avatarChao Yu <chao2.yu@samsung.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent bc4a1f87

fs/f2fs/f2fs.h

+1 −0
Original line number Diff line number Diff line
@@ -202,6 +202,7 @@ static inline bool __has_cursum_space(struct f2fs_summary_block *sum, int size, 
 */

#define F2FS_IOC_GETFLAGS		FS_IOC_GETFLAGS

#define F2FS_IOC_SETFLAGS		FS_IOC_SETFLAGS

#define F2FS_IOC_GETVERSION		FS_IOC_GETVERSION



#define F2FS_IOCTL_MAGIC		0xf5

#define F2FS_IOC_START_ATOMIC_WRITE	_IO(F2FS_IOCTL_MAGIC, 1)

fs/f2fs/file.c

+9 −0
Original line number Diff line number Diff line
@@ -926,6 +926,13 @@ static int f2fs_ioc_setflags(struct file *filp, unsigned long arg) 
	return ret;

}



static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)

{

	struct inode *inode = file_inode(filp);



	return put_user(inode->i_generation, (int __user *)arg);

}



static int f2fs_ioc_start_atomic_write(struct file *filp)

{

	struct inode *inode = file_inode(filp);
@@ -1061,6 +1068,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 
		return f2fs_ioc_getflags(filp, arg);

	case F2FS_IOC_SETFLAGS:

		return f2fs_ioc_setflags(filp, arg);

	case F2FS_IOC_GETVERSION:

		return f2fs_ioc_getversion(filp, arg);

	case F2FS_IOC_START_ATOMIC_WRITE:

		return f2fs_ioc_start_atomic_write(filp);

	case F2FS_IOC_COMMIT_ATOMIC_WRITE: