svn commit: r353690 - in head/sys: kern sys

[Conrad Meyer]

Author: cem
Date: Thu Oct 17 18:29:44 2019
New Revision: 353690
URL: https://svnweb.freebsd.org/changeset/base/353690

Log:
  Add a very limited DDB dumpon(8)-alike to MI dumper code
  
  This allows ddb(4) commands to construct a static dumperinfo during
  panic/debug and invoke doadump(false) using the provided dumper
  configuration (always inserted first in the list).
  
  The intended usecase is a ddb(4)-time netdump(4) command.
  
  Reviewed by:	markj (earlier version)
  Differential Revision:	https://reviews.freebsd.org/D21448

Modified:
  head/sys/kern/kern_shutdown.c
  head/sys/sys/conf.h

Modified: head/sys/kern/kern_shutdown.c
==============================================================================
--- head/sys/kern/kern_shutdown.c	Thu Oct 17 17:48:32 2019	(r353689)
+++ head/sys/kern/kern_shutdown.c	Thu Oct 17 18:29:44 2019	(r353690)
@@ -1267,6 +1267,20 @@ cleanup:
 	return (error);
 }
 
+#ifdef DDB
+void
+dumper_ddb_insert(struct dumperinfo *newdi)
+{
+	TAILQ_INSERT_HEAD(&dumper_configs, newdi, di_next);
+}
+
+void
+dumper_ddb_remove(struct dumperinfo *di)
+{
+	TAILQ_REMOVE(&dumper_configs, di, di_next);
+}
+#endif
+
 static bool
 dumper_config_match(const struct dumperinfo *di, const char *devname,
     const struct diocskerneldump_arg *kda)

Modified: head/sys/sys/conf.h
==============================================================================
--- head/sys/sys/conf.h	Thu Oct 17 17:48:32 2019	(r353689)
+++ head/sys/sys/conf.h	Thu Oct 17 18:29:44 2019	(r353690)
@@ -366,6 +366,10 @@ int dumper_insert(const struct dumperinfo *di_template
     const struct diocskerneldump_arg *kda);
 int dumper_remove(const char *devname, const struct diocskerneldump_arg *kda);
 
+/* For ddb(4)-time use only. */
+void dumper_ddb_insert(struct dumperinfo *);
+void dumper_ddb_remove(struct dumperinfo *);
+
 int dump_start(struct dumperinfo *di, struct kerneldumpheader *kdh);
 int dump_append(struct dumperinfo *, void *, vm_offset_t, size_t);
 int dump_write(struct dumperinfo *, void *, vm_offset_t, off_t, size_t);