Forced module unload

PATCH New Rusty Russell 1 participant 1 message Nov 15, 2002

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Rusty Russell

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2002-11-15 22:20 UTC #0 lore raw

PATCH 1/1 Forced module unload

This is the logical counterpoint to the code which marks modules "[unsafe]" when obsolete (racy) interfaces are used. Allows "just remove the damn thing" rmmod -f, and taints the kernel.

Rusty.
--
Anyone who quotes me in their sig is an idiot. -- Rusty Russell.

Name: Forced Module Unload
Author: Rusty Russell
Status: Experimental
Depends: Module/sparc-fixes2.patch.gz

D: Allows the (very dangerous!) "rmmod -f" for kernel developers and
D: desperate people.

include/linux/kernel.h +1 -0

diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .9002-linux-2.5.45/include/linux/kernel.h .9002-linux-2.5.45.updated/include/linux/kernel.h
@@ -102,6 +102,7 @@ extern const char *print_tainted(void);
 #define TAINT_PROPRIETORY_MODULE	(1<<0)
 #define TAINT_FORCED_MODULE		(1<<1)
 #define TAINT_UNSAFE_SMP		(1<<2)
+#define TAINT_FORCED_RMMOD		(1<<3)
 
 extern void dump_stack(void);

init/Kconfig +10 -0

diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .9002-linux-2.5.45/init/Kconfig .9002-linux-2.5.45.updated/init/Kconfig
@@ -125,6 +125,16 @@ config MODULE_UNLOAD
 	  anyway), which makes your kernel slightly smaller and
 	  simpler.  If unsure, say Y.
 
+config MODULE_FORCE_UNLOAD
+	bool "Forced module unloading"
+	depends on MODULES && EXPERIMENTAL
+	help
+	  This option allows you to force a module to unload, even if the
+	  kernel believes it is unsafe: the kernel will remove the module
+	  without waiting for anyone to stop using it (using the -f option to
+	  rmmod).  This is mainly for kernel developers and desparate users.
+	  If unsure, say N.
+
 config KMOD
 	bool "Kernel module loader"
 	depends on MODULES

kernel/module.c +38 ~~-15~~

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