virtio-fs: update fuse protocol header

Copy from virtiofsd @ 32006c66f2578af4121d7effaccae4aa4fa12e46. This
includes the definitions for FUSE_SETUPMAPPING AND FUSE_REMOVEMAPPING.

Signed-off-by: Fotis Xenakis <[email protected]>
Message-Id: <VI1PR03MB4383C4316CF92074FF397F11A6D40@VI1PR03MB4383.eurprd03.prod.outlook.com>

Author: foxeng

fs/virtiofs/fuse_kernel.h

@@ -44,7 +44,6 @@
  *  - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
  *  - add blksize field to fuse_attr
  *  - add file flags field to fuse_read_in and fuse_write_in
- *  - Add ATIME_NOW and MTIME_NOW flags to fuse_setattr_in
  *
  * 7.10
  *  - add nonseekable open flag
@@ -55,7 +54,7 @@
  *  - add POLL message and NOTIFY_POLL notification
  *
  * 7.12
- *  - add umask flag to input argument of create, mknod and mkdir
+ *  - add umask flag to input argument of open, mknod and mkdir
  *  - add notification messages for invalidation of inodes and
  *    directory entries
  *
@@ -120,19 +119,6 @@
  *
  *  7.28
  *  - add FUSE_COPY_FILE_RANGE
- *  - add FOPEN_CACHE_DIR
- *  - add FUSE_MAX_PAGES, add max_pages to init_out
- *  - add FUSE_CACHE_SYMLINKS
- *
- *  7.29
- *  - add FUSE_NO_OPENDIR_SUPPORT flag
- *
- *  7.30
- *  - add FUSE_EXPLICIT_INVAL_DATA
- *  - add FUSE_IOCTL_COMPAT_X32
- *
- *  7.31
- *  - add FUSE_WRITE_KILL_PRIV flag
  */
 
 #ifndef _LINUX_FUSE_H
@@ -168,7 +154,7 @@
 #define FUSE_KERNEL_VERSION 7
 
 /** Minor version number of this interface */
-#define FUSE_KERNEL_MINOR_VERSION 31
+#define FUSE_KERNEL_MINOR_VERSION 27
 
 /** The node ID of the root inode */
 #define FUSE_ROOT_ID 1
@@ -236,14 +222,10 @@ struct fuse_file_lock {
  * FOPEN_DIRECT_IO: bypass page cache for this open file
  * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
  * FOPEN_NONSEEKABLE: the file is not seekable
- * FOPEN_CACHE_DIR: allow caching this directory
- * FOPEN_STREAM: the file is stream-like (no file position at all)
  */
 #define FOPEN_DIRECT_IO		(1 << 0)
 #define FOPEN_KEEP_CACHE	(1 << 1)
 #define FOPEN_NONSEEKABLE	(1 << 2)
-#define FOPEN_CACHE_DIR		(1 << 3)
-#define FOPEN_STREAM		(1 << 4)
 
 /**
  * INIT request/reply flags
@@ -270,10 +252,6 @@ struct fuse_file_lock {
  * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
  * FUSE_POSIX_ACL: filesystem supports posix acls
  * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
- * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
- * FUSE_CACHE_SYMLINKS: cache READLINK responses
- * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
- * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request
  */
 #define FUSE_ASYNC_READ		(1 << 0)
 #define FUSE_POSIX_LOCKS	(1 << 1)
@@ -297,10 +275,6 @@ struct fuse_file_lock {
 #define FUSE_HANDLE_KILLPRIV	(1 << 19)
 #define FUSE_POSIX_ACL		(1 << 20)
 #define FUSE_ABORT_ERROR	(1 << 21)
-#define FUSE_MAX_PAGES		(1 << 22)
-#define FUSE_CACHE_SYMLINKS	(1 << 23)
-#define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
-#define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
 
 /**
  * CUSE INIT request/reply flags
@@ -330,11 +304,9 @@ struct fuse_file_lock {
  *
  * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
  * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
- * FUSE_WRITE_KILL_PRIV: kill suid and sgid bits
  */
 #define FUSE_WRITE_CACHE	(1 << 0)
 #define FUSE_WRITE_LOCKOWNER	(1 << 1)
-#define FUSE_WRITE_KILL_PRIV	(1 << 2)
 
 /**
  * Read flags
@@ -349,7 +321,6 @@ struct fuse_file_lock {
  * FUSE_IOCTL_RETRY: retry with new iovecs
  * FUSE_IOCTL_32BIT: 32bit ioctl
  * FUSE_IOCTL_DIR: is a directory
- * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t)
  *
  * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
  */
@@ -358,7 +329,6 @@ struct fuse_file_lock {
 #define FUSE_IOCTL_RETRY	(1 << 2)
 #define FUSE_IOCTL_32BIT	(1 << 3)
 #define FUSE_IOCTL_DIR		(1 << 4)
-#define FUSE_IOCTL_COMPAT_X32	(1 << 5)
 
 #define FUSE_IOCTL_MAX_IOV	256
 
@@ -369,13 +339,6 @@ struct fuse_file_lock {
  */
 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
 
-/**
- * Fsync flags
- *
- * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata
- */
-#define FUSE_FSYNC_FDATASYNC	(1 << 0)
-
 enum fuse_opcode {
 	FUSE_LOOKUP		= 1,
 	FUSE_FORGET		= 2,  /* no reply */
@@ -422,9 +385,11 @@ enum fuse_opcode {
 	FUSE_RENAME2		= 45,
 	FUSE_LSEEK		= 46,
 	FUSE_COPY_FILE_RANGE	= 47,
+        FUSE_SETUPMAPPING       = 48,
+        FUSE_REMOVEMAPPING      = 49,
 
 	/* CUSE specific operations */
-	CUSE_INIT		= 4096
+	CUSE_INIT		= 4096,
 };
 
 enum fuse_notify_code {
@@ -434,7 +399,7 @@ enum fuse_notify_code {
 	FUSE_NOTIFY_STORE = 4,
 	FUSE_NOTIFY_RETRIEVE = 5,
 	FUSE_NOTIFY_DELETE = 6,
-	FUSE_NOTIFY_CODE_MAX
+	FUSE_NOTIFY_CODE_MAX,
 };
 
 /* The read buffer is required to be at least 8k, but may be much larger */
@@ -651,9 +616,7 @@ struct fuse_init_out {
 	uint16_t	congestion_threshold;
 	uint32_t	max_write;
 	uint32_t	time_gran;
-	uint16_t	max_pages;
-	uint16_t	padding;
-	uint32_t	unused[8];
+	uint32_t	unused[9];
 };
 
 #define CUSE_INIT_INFO_MAX 4096
@@ -845,4 +808,35 @@ struct fuse_copy_file_range_in {
 	uint64_t	flags;
 };
 
+#define FUSE_SETUPMAPPING_ENTRIES 8
+#define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0)
+struct fuse_setupmapping_in {
+        /* An already open handle */
+	uint64_t	fh;
+        /* Offset into the file to start the mapping */
+        uint64_t        foffset;
+        /* Length of mapping required */
+        uint64_t        len;
+        /* Flags, FUSE_SETUPMAPPING_FLAG_* */
+        uint64_t        flags;
+        /* memory offset in to dax window */
+        uint64_t        moffset;
+};
+
+struct fuse_setupmapping_out {
+        /* Offsets into the cache of mappings */
+        uint64_t        coffset[FUSE_SETUPMAPPING_ENTRIES];
+        /* Lengths of each mapping */
+        uint64_t        len[FUSE_SETUPMAPPING_ENTRIES];
+};
+
+struct fuse_removemapping_in {
+        /* An already open handle */
+	uint64_t	fh;
+        /* Offset into the dax to start the unmapping */
+        uint64_t        moffset;
+        /* Length of mapping required */
+        uint64_t        len;
+};
+
 #endif /* _LINUX_FUSE_H */