Update modutils with 2.6 module support

git-svn-id: svn://busybox.net/trunk/busybox@8068 69ca8d6d-28ef-0310-b511-8ec308f3f277

4 files changed, 140 insertions, 38 deletions

diff --git a/debian/config-udeb-linux-i386 b/debian/config-udeb-linux-i386
index f44000482..678a6a193 100644
--- a/debian/config-udeb-linux-i386
+++ b/debian/config-udeb-linux-i386
@@ -252,8 +252,8 @@ CONFIG_USE_BB_PWD_GRP=y
 CONFIG_MODUTILS_OBJ=y
 CONFIG_DEPMOD=y
 CONFIG_INSMOD=y
-# CONFIG_FEATURE_OLD_MODULE_INTERFACE is not set
-CONFIG_FEATURE_NEW_MODULE_INTERFACE=y
+# CONFIG_FEATURE_2_2_MODULES is not set
+CONFIG_FEATURE_2_4_MODULES=y
 
 #
 #   Support new (post 2.1) Linux kernels (Forced enabled)
diff --git a/modutils/Config.in b/modutils/Config.in
index 96040cd69..d9f76d1b4 100644
--- a/modutils/Config.in
+++ b/modutils/Config.in
@@ -11,32 +11,31 @@ config CONFIG_INSMOD
         help
           insmod is used to load specified modules in the running kernel.
 
-config CONFIG_FEATURE_OLD_MODULE_INTERFACE
+config CONFIG_FEATURE_2_2_MODULES
         bool "  Support older (pre 2.1) Linux kernels"
         default n
         depends on CONFIG_INSMOD
         help
           Provide insmod support for older (pre 2.1) Linux kernels.
 
-if CONFIG_INSMOD && !CONFIG_FEATURE_OLD_MODULE_INTERFACE
-    config CONFIG_FEATURE_NEW_MODULE_INTERFACE
-            default y
-    comment "  Support new (post 2.1) Linux kernels (Forced enabled)"
-endif
-
-if CONFIG_FEATURE_OLD_MODULE_INTERFACE
-config CONFIG_FEATURE_NEW_MODULE_INTERFACE
-        bool "  Support new (post 2.1) Linux kernels"
+config CONFIG_FEATURE_2_4_MODULES
+        bool "  Support version 2.1.x to 2.4.x Linux kernels"
         default y
         depends on CONFIG_INSMOD
         help
           Support module loading for newer (post 2.1) Linux kernels.
-endif
+
+config CONFIG_FEATURE_2_6_MODULES
+        bool "  Support version 2.6.x Linux kernels"
+        default n
+        depends on CONFIG_INSMOD
+        help
+          Support module loading for newer (post 2.1) Linux kernels.
 
 config CONFIG_FEATURE_INSMOD_VERSION_CHECKING
         bool "  Module version checking"
         default n
-        depends on CONFIG_INSMOD
+        depends on CONFIG_INSMOD && ( CONFIG_FEATURE_2_2_MODULES || CONFIG_FEATURE_2_4_MODULES )
         help
           Support checking of versions for modules.  This is used to
           ensure that the kernel and module are made for each other.
@@ -44,7 +43,7 @@ config CONFIG_FEATURE_INSMOD_VERSION_CHECKING
 config CONFIG_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
         bool "  Add module symbols to kernel symbol table"
         default n
-        depends on CONFIG_INSMOD
+        depends on CONFIG_INSMOD && ( CONFIG_FEATURE_2_2_MODULES || CONFIG_FEATURE_2_4_MODULES )
         help
           By adding module symbols to the kernel symbol table, Oops messages 
           occuring within kernel modules can be properly debugged.  By enabling
@@ -55,7 +54,7 @@ config CONFIG_FEATURE_INSMOD_KSYMOOPS_SYMBOLS
 config CONFIG_FEATURE_INSMOD_LOADINKMEM
         bool "  In kernel memory optimization (uClinux only)"
         default n
-        depends on CONFIG_INSMOD
+        depends on CONFIG_INSMOD && ( CONFIG_FEATURE_2_2_MODULES || CONFIG_FEATURE_2_4_MODULES )
         help
           This is a special uClinux only memory optimization that lets insmod
           load the specified kernel module directly into kernel space, reducing
@@ -65,7 +64,7 @@ config CONFIG_FEATURE_INSMOD_LOADINKMEM
 config CONFIG_FEATURE_INSMOD_LOAD_MAP
         bool "  Enable load map (-m) option" 
         default n
-        depends on CONFIG_INSMOD
+        depends on CONFIG_INSMOD && ( CONFIG_FEATURE_2_2_MODULES || CONFIG_FEATURE_2_4_MODULES )
         help
           Enabling this, one would be able to get a load map
           output on stdout. This makes kernel module debugging
@@ -79,9 +78,8 @@ config CONFIG_FEATURE_INSMOD_LOAD_MAP_FULL
         depends on CONFIG_FEATURE_INSMOD_LOAD_MAP
         help
           Without this option, -m will only output section
-          load map.
-          With this option, -m will also output symbols
-          load map.
+          load map.  With this option, -m will also output 
+          symbols load map.
 
 config CONFIG_LSMOD
         bool "lsmod"
@@ -92,7 +90,7 @@ config CONFIG_LSMOD
 config CONFIG_FEATURE_QUERY_MODULE_INTERFACE
         bool "  Support lsmod query_module interface (add 638 bytes)"
         default y
-        depends on CONFIG_LSMOD && CONFIG_FEATURE_NEW_MODULE_INTERFACE
+        depends on CONFIG_LSMOD && ( CONFIG_FEATURE_2_4_MODULES || CONFIG_FEATURE_2_6_MODULES )
         help
           This will provide some extra information about each module when
           running lsmod.  The fields provided are address, size, flags and
diff --git a/modutils/insmod.c b/modutils/insmod.c
index e2ca64169..979c41f78 100644
--- a/modutils/insmod.c
+++ b/modutils/insmod.c
@@ -80,8 +80,24 @@
 #include <sys/utsname.h>
 #include "busybox.h"
 
-#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE
-# undef CONFIG_FEATURE_OLD_MODULE_INTERFACE
+#if !defined(CONFIG_FEATURE_2_4_MODULES) && \
+        !defined(CONFIG_FEATURE_2_2_MODULES) && \
+        !defined(CONFIG_FEATURE_2_6_MODULES)
+#define CONFIG_FEATURE_2_4_MODULES
+#endif
+
+#if !defined(CONFIG_FEATURE_2_4_MODULES) && !defined(CONFIG_FEATURE_2_2_MODULES)
+#define insmod_ng_main insmod_main
+#endif
+
+#if defined(CONFIG_FEATURE_2_4_MODULES) || defined(CONFIG_FEATURE_2_2_MODULES)
+
+#if defined(CONFIG_FEATURE_2_6_MODULES)
+extern int insmod_ng_main( int argc, char **argv);
+#endif
+
+#ifdef CONFIG_FEATURE_2_4_MODULES
+# undef CONFIG_FEATURE_2_2_MODULES
 # define new_sys_init_module    init_module
 #else
 # define old_sys_init_module    init_module
@@ -266,7 +282,7 @@
 #ifndef MODUTILS_MODULE_H
 static const int MODUTILS_MODULE_H = 1;
 
-#ident "$Id: insmod.c,v 1.106 2003/12/04 15:02:57 mjn3 Exp $"
+#ident "$Id: insmod.c,v 1.107 2003/12/11 01:42:13 andersen Exp $"
 
 /* This file contains the structures used by the 2.0 and 2.1 kernels.
    We do not use the kernel headers directly because we do not wish
@@ -399,7 +415,7 @@ struct new_module
   unsigned tgt_long persist_end;
   unsigned tgt_long can_unload;
   unsigned tgt_long runsize;
-#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE
+#ifdef CONFIG_FEATURE_2_4_MODULES
   const char *kallsyms_start;     /* All symbols for kernel debugging */
   const char *kallsyms_end;
   const char *archdata_start;     /* arch specific data for module */
@@ -487,7 +503,7 @@ int delete_module(const char *);
 #ifndef MODUTILS_OBJ_H
 static const int MODUTILS_OBJ_H = 1;
 
-#ident "$Id: insmod.c,v 1.106 2003/12/04 15:02:57 mjn3 Exp $"
+#ident "$Id: insmod.c,v 1.107 2003/12/11 01:42:13 andersen Exp $"
 
 /* The relocatable object is manipulated using elfin types.  */
 
@@ -630,7 +646,7 @@ static void *obj_extend_section (struct obj_section *sec, unsigned long more);
 static int obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
                      const char *string);
 
-#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE
+#ifdef CONFIG_FEATURE_2_4_MODULES
 static int obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
                      struct obj_symbol *sym);
 #endif
@@ -665,7 +681,7 @@ static void arch_create_got (struct obj_file *f);
 
 static int obj_gpl_license(struct obj_file *f, const char **license);
         
-#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE
+#ifdef CONFIG_FEATURE_2_4_MODULES
 static int arch_init_module (struct obj_file *f, struct new_module *);
 #endif
 
@@ -1626,7 +1642,7 @@ static void arch_create_got(struct obj_file *f)
 #endif /* defined(CONFIG_USE_GOT_ENTRIES) || defined(CONFIG_USE_PLT_ENTRIES) */
 }
 
-#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE
+#ifdef CONFIG_FEATURE_2_4_MODULES
 static int arch_init_module(struct obj_file *f, struct new_module *mod)
 {
         return 1;
@@ -2224,7 +2240,7 @@ old_get_module_version(struct obj_file *f, char str[STRVERSIONLEN])
 
 #endif   /* CONFIG_FEATURE_INSMOD_VERSION_CHECKING */
 
-#ifdef CONFIG_FEATURE_OLD_MODULE_INTERFACE
+#ifdef CONFIG_FEATURE_2_2_MODULES
 
 /* Fetch all the symbols and divvy them up as appropriate for the modules.  */
 
@@ -2434,7 +2450,7 @@ old_init_module(const char *m_name, struct obj_file *f,
 #define old_create_mod_use_count(x) TRUE
 #define old_init_module(x, y, z) TRUE
 
-#endif                                                  /* CONFIG_FEATURE_OLD_MODULE_INTERFACE */
+#endif                                                  /* CONFIG_FEATURE_2_2_MODULES */
 
 
 
@@ -2720,7 +2736,7 @@ new_get_module_version(struct obj_file *f, char str[STRVERSIONLEN])
 #endif   /* CONFIG_FEATURE_INSMOD_VERSION_CHECKING */
 
 
-#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE
+#ifdef CONFIG_FEATURE_2_4_MODULES
 
 /* Fetch the loaded modules, and all currently exported symbols.  */
 
@@ -3041,7 +3057,7 @@ new_init_module(const char *m_name, struct obj_file *f,
 #define new_create_module_ksymtab(x)
 #define query_module(v, w, x, y, z) -1
 
-#endif                                                  /* CONFIG_FEATURE_NEW_MODULE_INTERFACE */
+#endif                                                  /* CONFIG_FEATURE_2_4_MODULES */
 
 
 /*======================================================================*/
@@ -3075,7 +3091,7 @@ obj_string_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
         return 1;
 }
 
-#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE
+#ifdef CONFIG_FEATURE_2_4_MODULES
 static int
 obj_symbol_patch(struct obj_file *f, int secidx, ElfW(Addr) offset,
                                  struct obj_symbol *sym)
@@ -4161,7 +4177,7 @@ extern int insmod_main( int argc, char **argv)
 
         printf("Using %s\n", m_filename);
 
-#ifdef CONFIG_FEATURE_REALLY_NEW_MODULE_INTERFACE
+#ifdef CONFIG_FEATURE_2_6_MODULES
     if (create_module(NULL, 0) < 0 && errno == ENOSYS) {
                 optind--;
                 argv[optind] = m_filename;
@@ -4214,7 +4230,7 @@ extern int insmod_main( int argc, char **argv)
         k_new_syscalls = !query_module(NULL, 0, NULL, 0, NULL);
 
         if (k_new_syscalls) {
-#ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE
+#ifdef CONFIG_FEATURE_2_4_MODULES
                 if (!new_get_kernel_symbols())
                         goto out;
                 k_crcs = new_is_kernel_checksummed();
@@ -4223,7 +4239,7 @@ extern int insmod_main( int argc, char **argv)
                 goto out;
 #endif
         } else {
-#ifdef CONFIG_FEATURE_OLD_MODULE_INTERFACE
+#ifdef CONFIG_FEATURE_2_2_MODULES
                 if (!old_get_kernel_symbols(m_name))
                         goto out;
                 k_crcs = old_is_kernel_checksummed();
@@ -4345,3 +4361,82 @@ out:
 #endif
         return(exit_status);
 }
+
+
+#endif
+
+
+#ifdef CONFIG_FEATURE_2_6_MODULES
+
+#include <sys/mman.h>
+#include <asm/unistd.h>
+#include <sys/syscall.h>
+
+/* We use error numbers in a loose translation... */
+static const char *moderror(int err)
+{
+        switch (err) {
+        case ENOEXEC:
+                return "Invalid module format";
+        case ENOENT:
+                return "Unknown symbol in module";
+        case ESRCH:
+                return "Module has wrong symbol version";
+        case EINVAL:
+                return "Invalid parameters";
+        default:
+                return strerror(err);
+        }
+}
+
+extern int insmod_ng_main( int argc, char **argv)
+{
+        int i;
+        int fd;
+        long int ret;
+        struct stat st;
+        unsigned long len;
+        void *map;
+        char *filename, *options = bb_xstrdup("");
+        
+        filename = argv[1];
+        if (!filename) {
+                bb_show_usage();
+                return -1;
+        }
+
+        /* Rest is options */
+        for (i = 2; i < argc; i++) {
+                options = xrealloc(options, strlen(options) + 2 + strlen(argv[i]) + 2);
+                /* Spaces handled by "" pairs, but no way of escaping quotes */
+                if (strchr(argv[i], ' ')) {
+                        strcat(options, "\"");
+                        strcat(options, argv[i]);
+                        strcat(options, "\"");
+                } else {
+                        strcat(options, argv[i]);
+                }
+                strcat(options, " ");
+        }
+
+        if ((fd = open(filename, O_RDONLY, 0)) < 0) {
+                bb_perror_msg_and_die("cannot open module `%s'", filename);
+        }
+
+        fstat(fd, &st);
+        len = st.st_size;
+        map = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0);
+        if (map == MAP_FAILED) {
+                bb_perror_msg_and_die("cannot mmap `%s'", filename);
+        }
+
+        ret = syscall(__NR_init_module, map, len, options);
+        if (ret != 0) {
+                bb_perror_msg_and_die("cannot insert `%s': %s (%li)",
+                                                   filename, moderror(errno), ret);
+        }
+        
+        return 0;
+}
+
+#endif
diff --git a/modutils/rmmod.c b/modutils/rmmod.c
index a4ea70410..311b03dc4 100644
--- a/modutils/rmmod.c
+++ b/modutils/rmmod.c
@@ -25,6 +25,8 @@
 #include <unistd.h>
 #include <stdlib.h>
 #include <getopt.h>
+#include <fcntl.h>
+#include <sys/syscall.h>
 #include "busybox.h"
 
 extern int delete_module(const char * name);
@@ -37,10 +39,17 @@ extern int rmmod_main(int argc, char **argv)
         size_t pnmod = -1; /* previous number of modules */
         void *buf; /* hold the module names which we ignore but must get */
         size_t bufsize = 0;
+        unsigned int flags = O_NONBLOCK|O_EXCL;
 
         /* Parse command line. */
         while ((n = getopt(argc, argv, "a")) != EOF) {
                 switch (n) {
+                        case 'w':       // --wait
+                                flags &= ~O_NONBLOCK;
+                                break;  
+                        case 'f':       // --force
+                                flags |= O_TRUNC;
+                                break;  
                         case 'a':
                                 /* Unload _all_ unused modules via NULL delete_module() call */
                                 /* until the number of modules does not change */
@@ -67,7 +76,7 @@ extern int rmmod_main(int argc, char **argv)
                         bb_show_usage();
 
         for (n = optind; n < argc; n++) {
-                if (delete_module(argv[n]) < 0) {
+                if (syscall(__NR_delete_module, argv[n], flags) < 0) {
                         bb_perror_msg("%s", argv[n]);
                         ret = EXIT_FAILURE;
                 }