[PATCH 1/7] xfs: use thread_with_file to create a monitoring file

["Darrick J. Wong" <djwong@kernel.org>]

From: Darrick J. Wong <djwong@kernel.org>

Use Kent Overstreet's thread_with_file abstraction to provide a magic
file from which we can read filesystem health events.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
 libxfs/xfs_fs.h         |    1 +
 libxfs/xfs_fs_staging.h |   10 ++++++++++
 2 files changed, 11 insertions(+)


diff --git a/libxfs/xfs_fs.h b/libxfs/xfs_fs.h
index 246c2582abbe..b9d9bc511475 100644
--- a/libxfs/xfs_fs.h
+++ b/libxfs/xfs_fs.h
@@ -855,6 +855,7 @@ struct xfs_scrub_metadata {
 #define XFS_IOC_FSGETXATTRA	_IOR ('X', 45, struct fsxattr)
 /*	XFS_IOC_SETBIOSIZE ---- deprecated 46	   */
 /*	XFS_IOC_GETBIOSIZE ---- deprecated 47	   */
+/*	XFS_IOC_HEALTHMON -------- staging 48	   */
 #define XFS_IOC_GETBMAPX	_IOWR('X', 56, struct getbmap)
 #define XFS_IOC_ZERO_RANGE	_IOW ('X', 57, struct xfs_flock64)
 #define XFS_IOC_FREE_EOFBLOCKS	_IOR ('X', 58, struct xfs_fs_eofblocks)
diff --git a/libxfs/xfs_fs_staging.h b/libxfs/xfs_fs_staging.h
index 1da182c77934..84b99816eec2 100644
--- a/libxfs/xfs_fs_staging.h
+++ b/libxfs/xfs_fs_staging.h
@@ -303,4 +303,14 @@ struct xfs_map_freesp {
  */
 #define XFS_IOC_MAP_FREESP	_IOWR('X', 64, struct xfs_map_freesp)
 
+struct xfs_health_monitor {
+	__u64	flags;		/* flags */
+	__u8	format;		/* output format */
+	__u8	pad1[7];	/* zeroes */
+	__u64	pad2[2];	/* zeroes */
+};
+
+/* Monitor for health events. */
+#define XFS_IOC_HEALTH_MONITOR		_IOR ('X', 48, struct xfs_health_monitor)
+
 #endif /* __XFS_FS_STAGING_H__ */