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Commit 456b88e4 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
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f2fs: introduce a new ioctl F2FS_IOC_WRITE_CHECKPOINT 



This patch introduce a new ioctl for those users who want to trigger
checkpoint from userspace through ioctl.

Signed-off-by: default avatarChao Yu <chao2.yu@samsung.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent d530d4d8

fs/f2fs/f2fs.h

+1 −0
Original line number Diff line number Diff line
@@ -231,6 +231,7 @@ static inline bool __has_cursum_space(struct f2fs_summary_block *sum, int size, 
#define F2FS_IOC_RELEASE_VOLATILE_WRITE	_IO(F2FS_IOCTL_MAGIC, 4)

#define F2FS_IOC_ABORT_VOLATILE_WRITE	_IO(F2FS_IOCTL_MAGIC, 5)

#define F2FS_IOC_GARBAGE_COLLECT	_IO(F2FS_IOCTL_MAGIC, 6)

#define F2FS_IOC_WRITE_CHECKPOINT	_IO(F2FS_IOCTL_MAGIC, 7)



#define F2FS_IOC_SET_ENCRYPTION_POLICY					\

		_IOR('f', 19, struct f2fs_encryption_policy)

fs/f2fs/file.c

+23 −0
Original line number Diff line number Diff line
@@ -1639,6 +1639,27 @@ static int f2fs_ioc_gc(struct file *filp, unsigned long arg) 
	return f2fs_gc(sbi, sync);

}



static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)

{

	struct inode *inode = file_inode(filp);

	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);

	struct cp_control cpc;



	if (!capable(CAP_SYS_ADMIN))

		return -EPERM;



	if (f2fs_readonly(sbi->sb))

		return -EROFS;



	cpc.reason = __get_cp_reason(sbi);



	mutex_lock(&sbi->gc_mutex);

	write_checkpoint(sbi, &cpc);

	mutex_unlock(&sbi->gc_mutex);



	return 0;

}



long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)

{

	switch (cmd) {
@@ -1670,6 +1691,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 
		return f2fs_ioc_get_encryption_pwsalt(filp, arg);

	case F2FS_IOC_GARBAGE_COLLECT:

		return f2fs_ioc_gc(filp, arg);

	case F2FS_IOC_WRITE_CHECKPOINT:

		return f2fs_ioc_write_checkpoint(filp, arg);

	default:

		return -ENOTTY;

	}