xfs: specify AG in bulk req

Source kernel commit: 13d59a2a61cbbb4cda13a0cba6d4d1fc537f5dd4

Add a new xfs_bulk_ireq flag to constrain the iteration to a single AG.
If the passed-in startino value is zero then we start with the first
inode in the AG that the user passes in; otherwise, we iterate only
within the same AG as the passed-in inode.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>

diff --git a/libxfs/xfs_fs.h b/libxfs/xfs_fs.h
index e41a3de7cd55104ed34bf7d3b953afd7d4474d10..c9f7166cf32fb6a0f47cf103cd43f9995aa49e15 100644 (file)
--- a/libxfs/xfs_fs.h
+++ b/libxfs/xfs_fs.h
@@ -483,11 +483,17 @@ struct xfs_bulk_ireq {
        uint32_t        flags;          /* I/O: operation flags         */
        uint32_t        icount;         /* I: count of entries in buffer */
        uint32_t        ocount;         /* O: count of entries filled out */
-       uint32_t        reserved32;     /* must be zero                 */
+       uint32_t        agno;           /* I: see comment for IREQ_AGNO */
        uint64_t        reserved[5];    /* must be zero                 */
 };
 
-#define XFS_BULK_IREQ_FLAGS_ALL        (0)
+/*
+ * Only return results from the specified @agno.  If @ino is zero, start
+ * with the first inode of @agno.
+ */
+#define XFS_BULK_IREQ_AGNO     (1 << 0)
+
+#define XFS_BULK_IREQ_FLAGS_ALL        (XFS_BULK_IREQ_AGNO)
 
 /*
  * ioctl structures for v5 bulkstat and inumbers requests