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[PATCH 1/2] xfs: introduce a generic shutdown ioctl

To: linux-kernel@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx
Subject: [PATCH 1/2] xfs: introduce a generic shutdown ioctl
From: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Date: Fri, 9 Jan 2015 01:34:35 -0800
Cc: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>
Delivered-to: xfs@xxxxxxxxxxx
This patch introduces a generic ioctl for fs shutdown used by xfs.

Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
---
 fs/xfs/xfs_fs.h         | 8 ++++----
 include/uapi/linux/fs.h | 8 ++++++++
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/fs/xfs/xfs_fs.h b/fs/xfs/xfs_fs.h
index 18dc721..fe0eeee 100644
--- a/fs/xfs/xfs_fs.h
+++ b/fs/xfs/xfs_fs.h
@@ -484,9 +484,9 @@ typedef struct xfs_swapext
 /*
  * Flags for going down operation
  */
-#define XFS_FSOP_GOING_FLAGS_DEFAULT           0x0     /* going down */
-#define XFS_FSOP_GOING_FLAGS_LOGFLUSH          0x1     /* flush log but not 
data */
-#define XFS_FSOP_GOING_FLAGS_NOLOGFLUSH                0x2     /* don't flush 
log nor data */
+#define XFS_FSOP_GOING_FLAGS_DEFAULT   FS_GOING_DOWN_FULLSYNC
+#define XFS_FSOP_GOING_FLAGS_LOGFLUSH  FS_GOING_DOWN_METASYNC
+#define XFS_FSOP_GOING_FLAGS_NOLOGFLUSH        FS_GOING_DOWN_NOSYNC
 
 /*
  * ioctl commands that are used by Linux filesystems
@@ -555,7 +555,7 @@ typedef struct xfs_swapext
 #define XFS_IOC_ATTRLIST_BY_HANDLE   _IOW ('X', 122, struct 
xfs_fsop_attrlist_handlereq)
 #define XFS_IOC_ATTRMULTI_BY_HANDLE  _IOW ('X', 123, struct 
xfs_fsop_attrmulti_handlereq)
 #define XFS_IOC_FSGEOMETRY          _IOR ('X', 124, struct xfs_fsop_geom)
-#define XFS_IOC_GOINGDOWN           _IOR ('X', 125, __uint32_t)
+#define XFS_IOC_GOINGDOWN           FS_IOC_SHUTDOWN
 /*     XFS_IOC_GETFSUUID ---------- deprecated 140      */
 
 
diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index 3735fa0..a4e4be5 100644
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h
@@ -157,6 +157,7 @@ struct inodes_stat_t {
 #define FIFREEZE       _IOWR('X', 119, int)    /* Freeze */
 #define FITHAW         _IOWR('X', 120, int)    /* Thaw */
 #define FITRIM         _IOWR('X', 121, struct fstrim_range)    /* Trim */
+#define FS_IOC_SHUTDOWN        _IOR('X', 125, __u32)   /* Shutdown */
 
 #define        FS_IOC_GETFLAGS                 _IOR('f', 1, long)
 #define        FS_IOC_SETFLAGS                 _IOW('f', 2, long)
@@ -205,4 +206,11 @@ struct inodes_stat_t {
 #define SYNC_FILE_RANGE_WRITE          2
 #define SYNC_FILE_RANGE_WAIT_AFTER     4
 
+/*
+ * Flags for going down operation used by FS_IOC_GOINGDOWN
+ */
+#define FS_GOING_DOWN_FULLSYNC 0x0     /* going down with full sync */
+#define FS_GOING_DOWN_METASYNC 0x1     /* going down with metadata */
+#define FS_GOING_DOWN_NOSYNC   0x2     /* going down */
+
 #endif /* _UAPI_LINUX_FS_H */
-- 
2.1.1

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