landlock: Rename "ptrace" files to "task"

ptrace.[ch] are currently only used for the ptrace LSM hooks but their
scope will expand with IPCs and audit support.  Rename ptrace.[ch] to
task.[ch], which better reflect their content.  Similarly, rename
landlock_add_ptrace_hooks() to landlock_add_task_hooks().  Keep header
files for now.

Cc: Günther Noack <[email protected]>
Cc: Paul Moore <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mickaël Salaün <[email protected]>

Author: l0kod

security/landlock/Makefile

@@ -1,6 +1,6 @@
 obj-$(CONFIG_SECURITY_LANDLOCK) := landlock.o
 
 landlock-y := setup.o syscalls.o object.o ruleset.o \
-	cred.o ptrace.o fs.o
+	cred.o task.o fs.o
 
 landlock-$(CONFIG_INET) += net.o

security/landlock/setup.c

@@ -14,8 +14,8 @@
 #include "cred.h"
 #include "fs.h"
 #include "net.h"
-#include "ptrace.h"
 #include "setup.h"
+#include "task.h"
 
 bool landlock_initialized __ro_after_init = false;
 
@@ -34,7 +34,7 @@ const struct lsm_id landlock_lsmid = {
 static int __init landlock_init(void)
 {
 	landlock_add_cred_hooks();
-	landlock_add_ptrace_hooks();
+	landlock_add_task_hooks();
 	landlock_add_fs_hooks();
 	landlock_add_net_hooks();
 	landlock_initialized = true;

security/landlock/ptrace.c renamed to security/landlock/task.c

@@ -16,9 +16,9 @@
 
 #include "common.h"
 #include "cred.h"
-#include "ptrace.h"
 #include "ruleset.h"
 #include "setup.h"
+#include "task.h"
 
 /**
  * domain_scope_le - Checks domain ordering for scoped ptrace
@@ -113,7 +113,7 @@ static struct security_hook_list landlock_hooks[] __ro_after_init = {
 	LSM_HOOK_INIT(ptrace_traceme, hook_ptrace_traceme),
 };
 
-__init void landlock_add_ptrace_hooks(void)
+__init void landlock_add_task_hooks(void)
 {
 	security_add_hooks(landlock_hooks, ARRAY_SIZE(landlock_hooks),
 			   &landlock_lsmid);

security/landlock/ptrace.h renamed to security/landlock/task.h

@@ -6,9 +6,9 @@
  * Copyright © 2019 ANSSI
  */
 
-#ifndef _SECURITY_LANDLOCK_PTRACE_H
-#define _SECURITY_LANDLOCK_PTRACE_H
+#ifndef _SECURITY_LANDLOCK_TASK_H
+#define _SECURITY_LANDLOCK_TASK_H
 
-__init void landlock_add_ptrace_hooks(void);
+__init void landlock_add_task_hooks(void);
 
-#endif /* _SECURITY_LANDLOCK_PTRACE_H */
+#endif /* _SECURITY_LANDLOCK_TASK_H */