xfs: enable fsmap reporting for internal RT devices

Source kernel commit: e50ec7fac81aa271f20ae09868f772ff43a240b0

File system with internal RT devices are a bit odd in that we need
to report AGs and RGs.  To make this happen use separate synthetic
fmr_device values for the different sections instead of the dev_t
mapping used by other XFS configurations.

The data device is reported as file system metadata before the
start of the RGs for the synthetic RT fmr_device.

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

diff --git a/libxfs/xfs_fs.h b/libxfs/xfs_fs.h
index 5e66fb2b2cc7b75e9cb312a4485a6ed11f4a5287..12463ba766da053530e19b34c6a8344c67da3cd8 100644 (file)
--- a/libxfs/xfs_fs.h
+++ b/libxfs/xfs_fs.h
@@ -1082,6 +1082,15 @@ struct xfs_rtgroup_geometry {
 #define XFS_IOC_COMMIT_RANGE        _IOW ('X', 131, struct xfs_commit_range)
 /*     XFS_IOC_GETFSUUID ---------- deprecated 140      */
 
+/*
+ * Devices supported by a single XFS file system.  Reported in fsmaps fmr_device
+ * when using internal RT devices.
+ */
+enum xfs_device {
+       XFS_DEV_DATA    = 1,
+       XFS_DEV_LOG     = 2,
+       XFS_DEV_RT      = 3,
+};
 
 #ifndef HAVE_BBMACROS
 /*