[PATCH 09/11] xfs_repair: add a testing hook for NEEDSREPAIR

["Darrick J. Wong" <djwong@xxxxxxxxxx>]

From: Darrick J. Wong <djwong@xxxxxxxxxx>

Simulate a crash when anyone calls force_needsrepair.  This is a debug
knob so that we can test that the kernel won't mount after setting
needsrepair and that a re-run of xfs_repair will clear the flag.

Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
 repair/globals.c    |    1 +
 repair/globals.h    |    2 ++
 repair/phase2.c     |    4 ++++
 repair/xfs_repair.c |    5 +++++
 4 files changed, 12 insertions(+)


diff --git a/repair/globals.c b/repair/globals.c
index 699a96ee..b0e23864 100644
--- a/repair/globals.c
+++ b/repair/globals.c
@@ -40,6 +40,7 @@ int	dangerously;		/* live dangerously ... fix ro mount */
 int	isa_file;
 int	zap_log;
 int	dumpcore;		/* abort, not exit on fatal errs */
+bool	abort_after_force_needsrepair;
 int	force_geo;		/* can set geo on low confidence info */
 int	assume_xfs;		/* assume we have an xfs fs */
 char	*log_name;		/* Name of log device */
diff --git a/repair/globals.h b/repair/globals.h
index 043b3e8e..9fa73b2c 100644
--- a/repair/globals.h
+++ b/repair/globals.h
@@ -82,6 +82,8 @@ extern int	isa_file;
 extern int	zap_log;
 extern int	dumpcore;		/* abort, not exit on fatal errs */
 extern int	force_geo;		/* can set geo on low confidence info */
+/* Abort after forcing NEEDSREPAIR to test its functionality */
+extern bool	abort_after_force_needsrepair;
 extern int	assume_xfs;		/* assume we have an xfs fs */
 extern char	*log_name;		/* Name of log device */
 extern int	log_spec;		/* Log dev specified as option */
diff --git a/repair/phase2.c b/repair/phase2.c
index 9a8d42e1..177e0831 100644
--- a/repair/phase2.c
+++ b/repair/phase2.c
@@ -183,6 +183,10 @@ upgrade_filesystem(
                         do_error(
 	_("filesystem feature upgrade failed, err=%d\n"),
                                         error);
+
+		/* Simulate a crash after setting needsrepair. */
+		if (abort_after_force_needsrepair)
+			exit(55);
         }
         if (bp)
                 libxfs_buf_relse(bp);
diff --git a/repair/xfs_repair.c b/repair/xfs_repair.c
index a613505f..293d89b1 100644
--- a/repair/xfs_repair.c
+++ b/repair/xfs_repair.c
@@ -44,6 +44,7 @@ enum o_opt_nums {
 	BLOAD_LEAF_SLACK,
 	BLOAD_NODE_SLACK,
 	NOQUOTA,
+	FORCE_NEEDSREPAIR_ABORT,
 	O_MAX_OPTS,
 };
 
@@ -57,6 +58,7 @@ static char *o_opts[] = {
 	[BLOAD_LEAF_SLACK]	= "debug_bload_leaf_slack",
 	[BLOAD_NODE_SLACK]	= "debug_bload_node_slack",
 	[NOQUOTA]		= "noquota",
+	[FORCE_NEEDSREPAIR_ABORT] = "debug_force_needsrepair_abort",
 	[O_MAX_OPTS]		= NULL,
 };
 
@@ -282,6 +284,9 @@ process_args(int argc, char **argv)
 		_("-o debug_bload_node_slack requires a parameter\n"));
 					bload_node_slack = (int)strtol(val, NULL, 0);
 					break;
+				case FORCE_NEEDSREPAIR_ABORT:
+					abort_after_force_needsrepair = true;
+					break;
 				case NOQUOTA:
 					quotacheck_skip();
 					break;