Commit 34dc77ad authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: add ioctl to do gc with target block address 



This patch adds f2fs_ioc_gc_range() to move blocks located in the given
range.

Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent a9bcf9bc

fs/f2fs/f2fs.h

+8 −0
Original line number Diff line number Diff line
@@ -303,6 +303,8 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal, 
						struct f2fs_move_range)

#define F2FS_IOC_FLUSH_DEVICE		_IOW(F2FS_IOCTL_MAGIC, 10,	\

						struct f2fs_flush_device)

#define F2FS_IOC_GARBAGE_COLLECT_RANGE	_IOW(F2FS_IOCTL_MAGIC, 11,	\

						struct f2fs_gc_range)



#define F2FS_IOC_SET_ENCRYPTION_POLICY	FS_IOC_SET_ENCRYPTION_POLICY

#define F2FS_IOC_GET_ENCRYPTION_POLICY	FS_IOC_GET_ENCRYPTION_POLICY
@@ -327,6 +329,12 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal, 
#define F2FS_IOC32_GETVERSION		FS_IOC32_GETVERSION

#endif



struct f2fs_gc_range {

	u32 sync;

	u64 start;

	u64 len;

};



struct f2fs_defragment {

	u64 start;

	u64 len;

fs/f2fs/file.c

+47 −0
Original line number Diff line number Diff line
@@ -1911,6 +1911,50 @@ static int f2fs_ioc_gc(struct file *filp, unsigned long arg) 
	return ret;

}



static int f2fs_ioc_gc_range(struct file *filp, unsigned long arg)

{

	struct inode *inode = file_inode(filp);

	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);

	struct f2fs_gc_range range;

	u64 end;

	int ret;



	if (!capable(CAP_SYS_ADMIN))

		return -EPERM;



	if (copy_from_user(&range, (struct f2fs_gc_range __user *)arg,

							sizeof(range)))

		return -EFAULT;



	if (f2fs_readonly(sbi->sb))

		return -EROFS;



	ret = mnt_want_write_file(filp);

	if (ret)

		return ret;



	end = range.start + range.len;

	if (range.start < MAIN_BLKADDR(sbi) || end >= MAX_BLKADDR(sbi))

		return -EINVAL;

do_more:

	if (!range.sync) {

		if (!mutex_trylock(&sbi->gc_mutex)) {

			ret = -EBUSY;

			goto out;

		}

	} else {

		mutex_lock(&sbi->gc_mutex);

	}



	ret = f2fs_gc(sbi, range.sync, true, GET_SEGNO(sbi, range.start));

	range.start += sbi->blocks_per_seg;

	if (range.start <= end)

		goto do_more;

out:

	mnt_drop_write_file(filp);

	return ret;

}



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

{

	struct inode *inode = file_inode(filp);
@@ -2355,6 +2399,8 @@ 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_GARBAGE_COLLECT_RANGE:

		return f2fs_ioc_gc_range(filp, arg);

	case F2FS_IOC_WRITE_CHECKPOINT:

		return f2fs_ioc_write_checkpoint(filp, arg);

	case F2FS_IOC_DEFRAGMENT:
@@ -2423,6 +2469,7 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 
	case F2FS_IOC_GET_ENCRYPTION_PWSALT:

	case F2FS_IOC_GET_ENCRYPTION_POLICY:

	case F2FS_IOC_GARBAGE_COLLECT:

	case F2FS_IOC_GARBAGE_COLLECT_RANGE:

	case F2FS_IOC_WRITE_CHECKPOINT:

	case F2FS_IOC_DEFRAGMENT:

	case F2FS_IOC_MOVE_RANGE: