From: Darrick J. Wong <djwong@kernel.org>
Date: Sun, 22 Feb 2026 22:41:05 +0000 (-0800)
Subject: xfs: check if an open file is on the health monitored fs
X-Git-Tag: v7.0.0~88
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=ac360cbefe209581cab45f6b9a6ed536dbffa123;p=xfsprogs-dev.git

xfs: check if an open file is on the health monitored fs

Source kernel commit: 8b85dc4090e1c72c6d42acd823514cce67cd54fc

Create a new ioctl for the healthmon file that checks that a given fd
points to the same filesystem that the healthmon file is monitoring.
This allows xfs_healer to check that when it reopens a mountpoint to
perform repairs, the file that it gets matches the filesystem that
generated the corruption report.

(Note that xfs_healer doesn't maintain an open fd to a filesystem that
it's monitoring so that it doesn't pin the mount.)

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---

diff --git a/libxfs/xfs_fs.h b/libxfs/xfs_fs.h
index 4ec1b2ae..a01303c5 100644
--- a/libxfs/xfs_fs.h
+++ b/libxfs/xfs_fs.h
@@ -1151,6 +1151,15 @@ struct xfs_health_monitor {
 /* Initial return format version */
 #define XFS_HEALTH_MONITOR_FMT_V0	(0)
 
+/*
+ * Check that a given fd points to the same filesystem that the health monitor
+ * is monitoring.
+ */
+struct xfs_health_file_on_monitored_fs {
+	__s32		fd;
+	__u32		flags;	/* zero for now */
+};
+
 /*
  * ioctl commands that are used by Linux filesystems
  */
@@ -1191,7 +1200,8 @@ struct xfs_health_monitor {
 #define XFS_IOC_SCRUBV_METADATA	_IOWR('X', 64, struct xfs_scrub_vec_head)
 #define XFS_IOC_RTGROUP_GEOMETRY _IOWR('X', 65, struct xfs_rtgroup_geometry)
 #define XFS_IOC_HEALTH_MONITOR	_IOW ('X', 68, struct xfs_health_monitor)
-
+#define XFS_IOC_HEALTH_FD_ON_MONITORED_FS \
+				_IOW ('X', 69, struct xfs_health_file_on_monitored_fs)
 /*
  * ioctl commands that replace IRIX syssgi()'s
  */