Commit 98046f74 authored by Jeffle Xu's avatar Jeffle Xu Committed by Miklos Szeredi
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fuse: support per inode DAX in fuse protocol 



Expand the fuse protocol to support per inode DAX.

FUSE_HAS_INODE_DAX flag is added indicating if fuse server/client
supporting per inode DAX. It can be conveyed in both FUSE_INIT request and
reply.

FUSE_ATTR_DAX flag is added indicating if DAX shall be enabled for
corresponding file. It is conveyed in FUSE_LOOKUP reply.

Signed-off-by: default avatarJeffle Xu <jefflexu@linux.alibaba.com>
Reviewed-by: default avatarVivek Goyal <vgoyal@redhat.com>
Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
parent 780b1b95

include/uapi/linux/fuse.h

+5 −0
Original line number Original line Diff line number Diff line
@@ -193,6 +193,7 @@ 
 *  - add flags2 to fuse_init_in and fuse_init_out

 *  - add flags2 to fuse_init_in and fuse_init_out

 *  - add FUSE_SECURITY_CTX init flag

 *  - add FUSE_SECURITY_CTX init flag

 *  - add security context to create, mkdir, symlink, and mknod requests

 *  - add security context to create, mkdir, symlink, and mknod requests

 *  - add FUSE_HAS_INODE_DAX, FUSE_ATTR_DAX

 */

 */





#ifndef _LINUX_FUSE_H

#ifndef _LINUX_FUSE_H
@@ -351,6 +352,7 @@ struct fuse_file_lock { 
 * FUSE_INIT_RESERVED: reserved, do not use

 * FUSE_INIT_RESERVED: reserved, do not use

 * FUSE_SECURITY_CTX:	add security context to create, mkdir, symlink, and

 * FUSE_SECURITY_CTX:	add security context to create, mkdir, symlink, and

 *			mknod

 *			mknod

 * FUSE_HAS_INODE_DAX:  use per inode DAX

 */

 */

#define FUSE_ASYNC_READ		(1 << 0)

#define FUSE_ASYNC_READ		(1 << 0)

#define FUSE_POSIX_LOCKS	(1 << 1)

#define FUSE_POSIX_LOCKS	(1 << 1)
@@ -386,6 +388,7 @@ struct fuse_file_lock { 
#define FUSE_INIT_RESERVED	(1 << 31)

#define FUSE_INIT_RESERVED	(1 << 31)

/* bits 32..63 get shifted down 32 bits into the flags2 field */

/* bits 32..63 get shifted down 32 bits into the flags2 field */

#define FUSE_SECURITY_CTX	(1ULL << 32)

#define FUSE_SECURITY_CTX	(1ULL << 32)

#define FUSE_HAS_INODE_DAX	(1ULL << 33)





/**

/**

 * CUSE INIT request/reply flags

 * CUSE INIT request/reply flags
@@ -468,8 +471,10 @@ struct fuse_file_lock { 
 * fuse_attr flags

 * fuse_attr flags

 *

 *

 * FUSE_ATTR_SUBMOUNT: Object is a submount root

 * FUSE_ATTR_SUBMOUNT: Object is a submount root

 * FUSE_ATTR_DAX: Enable DAX for this file in per inode DAX mode

 */

 */

#define FUSE_ATTR_SUBMOUNT      (1 << 0)

#define FUSE_ATTR_SUBMOUNT      (1 << 0)

#define FUSE_ATTR_DAX		(1 << 1)





/**

/**

 * Open flags

 * Open flags