[PATCH 22/24] xfs: query the per-AG reservation counters

Establish an ioctl for userspace to query the original and current
per-AG reservation counts.  This will be used by xfs_scrub to
check that the vfs counters are at least somewhat sane.

Signed-off-by: Darrick J. Wong <[email protected]>
---
 libxfs/xfs_fs.h |   10 ++++++++++
 1 file changed, 10 insertions(+)


diff --git a/libxfs/xfs_fs.h b/libxfs/xfs_fs.h
index fd2dd80..2c37d57 100644
--- a/libxfs/xfs_fs.h
+++ b/libxfs/xfs_fs.h
@@ -580,6 +580,15 @@ struct xfs_scrub_metadata {
 #define XFS_SCRUB_FLAGS_ALL	0x0	/* no flags yet */
 
 /*
+ * AG reserved block counters
+ */
+struct xfs_fsop_ag_resblks {
+	__u64 resblks;		/* blocks reserved now */
+	__u64 resblks_orig;	/* blocks reserved at mount time */
+	__u64 reserved[2];
+};
+
+/*
  * ioctl limits
  */
 #ifdef XATTR_LIST_MAX
@@ -652,6 +661,7 @@ struct xfs_scrub_metadata {
 #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_GET_AG_RESBLKS	     _IOR ('X', 126, struct xfs_fsop_ag_resblks)
 /*	XFS_IOC_GETFSUUID ---------- deprecated 140	 */
 
 /* reflink ioctls; these MUST match the btrfs ioctl definitions */

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