Commit 5f95c181 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: add ioctl to get IO priority hint 



This patch adds an ioctl to give a per-file priority hint to attach
REQ_PRIO.

Reviewed-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 4f91f074

fs/f2fs/data.c

+6 −0
Original line number Diff line number Diff line
@@ -413,6 +413,7 @@ int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr) 
static blk_opf_t f2fs_io_flags(struct f2fs_io_info *fio)

{

	unsigned int temp_mask = GENMASK(NR_TEMP_TYPE - 1, 0);

	struct folio *fio_folio = page_folio(fio->page);

	unsigned int fua_flag, meta_flag, io_flag;

	blk_opf_t op_flags = 0;
@@ -438,6 +439,11 @@ static blk_opf_t f2fs_io_flags(struct f2fs_io_info *fio) 
		op_flags |= REQ_META;

	if (BIT(fio->temp) & fua_flag)

		op_flags |= REQ_FUA;



	if (fio->type == DATA &&

	    F2FS_I(fio_folio->mapping->host)->ioprio_hint == F2FS_IOPRIO_WRITE)

		op_flags |= REQ_PRIO;



	return op_flags;

}

fs/f2fs/f2fs.h

+1 −0
Original line number Diff line number Diff line
@@ -830,6 +830,7 @@ struct f2fs_inode_info { 


	/* Use below internally in f2fs*/

	unsigned long flags[BITS_TO_LONGS(FI_MAX)];	/* use to pass per-file flags */

	unsigned int ioprio_hint;	/* hint for IO priority */

	struct f2fs_rwsem i_sem;	/* protect fi info */

	atomic_t dirty_pages;		/* # of dirty pages */

	f2fs_hash_t chash;		/* hash value of given file name */

fs/f2fs/file.c

+20 −0
Original line number Diff line number Diff line
@@ -3446,6 +3446,23 @@ static int f2fs_ioc_get_dev_alias_file(struct file *filp, unsigned long arg) 
			(u32 __user *)arg);

}



static int f2fs_ioc_io_prio(struct file *filp, unsigned long arg)

{

	struct inode *inode = file_inode(filp);

	__u32 level;



	if (get_user(level, (__u32 __user *)arg))

		return -EFAULT;



	if (!S_ISREG(inode->i_mode) || level >= F2FS_IOPRIO_MAX)

		return -EINVAL;



	inode_lock(inode);

	F2FS_I(inode)->ioprio_hint = level;

	inode_unlock(inode);

	return 0;

}



int f2fs_precache_extents(struct inode *inode)

{

	struct f2fs_inode_info *fi = F2FS_I(inode);
@@ -4547,6 +4564,8 @@ static long __f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 
		return f2fs_ioc_compress_file(filp);

	case F2FS_IOC_GET_DEV_ALIAS_FILE:

		return f2fs_ioc_get_dev_alias_file(filp, arg);

	case F2FS_IOC_IO_PRIO:

		return f2fs_ioc_io_prio(filp, arg);

	default:

		return -ENOTTY;

	}
@@ -5261,6 +5280,7 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 
	case F2FS_IOC_DECOMPRESS_FILE:

	case F2FS_IOC_COMPRESS_FILE:

	case F2FS_IOC_GET_DEV_ALIAS_FILE:

	case F2FS_IOC_IO_PRIO:

		break;

	default:

		return -ENOIOCTLCMD;

include/uapi/linux/f2fs.h

+7 −0
Original line number Diff line number Diff line
@@ -44,6 +44,7 @@ 
#define F2FS_IOC_COMPRESS_FILE		_IO(F2FS_IOCTL_MAGIC, 24)

#define F2FS_IOC_START_ATOMIC_REPLACE	_IO(F2FS_IOCTL_MAGIC, 25)

#define F2FS_IOC_GET_DEV_ALIAS_FILE	_IOR(F2FS_IOCTL_MAGIC, 26, __u32)

#define F2FS_IOC_IO_PRIO		_IOW(F2FS_IOCTL_MAGIC, 27, __u32)



/*

 * should be same as XFS_IOC_GOINGDOWN.
@@ -63,6 +64,12 @@ 
#define F2FS_TRIM_FILE_ZEROOUT		0x2	/* zero out */

#define F2FS_TRIM_FILE_MASK		0x3



/* for F2FS_IOC_IO_PRIO */

enum {

	F2FS_IOPRIO_WRITE = 1,	/* high write priority */

	F2FS_IOPRIO_MAX,

};



struct f2fs_gc_range {

	__u32 sync;

	__u64 start;