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authorRusty Russell <rusty@rustcorp.com.au>2010-08-05 12:59:09 -0600
committerRusty Russell <rusty@rustcorp.com.au>2010-08-05 12:59:09 +0930
commit8f6d037815466cb25e7de8f00536eca71d94d4c3 (patch)
tree2ac887a230476a7550ff0360dd1ae0b678da8d82 /kernel
parentd913188c75191114051cf0bac75dad444c6080fa (diff)
downloadvexpress-lsk-8f6d037815466cb25e7de8f00536eca71d94d4c3.tar.gz
module: sysfs cleanup
We change the sysfs functions to take struct load_info, and call them all in mod_sysfs_setup(). We also clean up the #ifdefs a little. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/module.c77
1 files changed, 34 insertions, 43 deletions
diff --git a/kernel/module.c b/kernel/module.c
index fb11e2a8823..fd8d46c6976 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1126,8 +1126,9 @@ static const struct kernel_symbol *resolve_symbol_wait(Elf_Shdr *sechdrs,
* /sys/module/foo/sections stuff
* J. Corbet <corbet@lwn.net>
*/
-#if defined(CONFIG_KALLSYMS) && defined(CONFIG_SYSFS)
+#ifdef CONFIG_SYSFS
+#ifdef CONFIG_KALLSYMS
static inline bool sect_empty(const Elf_Shdr *sect)
{
return !(sect->sh_flags & SHF_ALLOC) || sect->sh_size == 0;
@@ -1164,8 +1165,7 @@ static void free_sect_attrs(struct module_sect_attrs *sect_attrs)
kfree(sect_attrs);
}
-static void add_sect_attrs(struct module *mod, unsigned int nsect,
- char *secstrings, Elf_Shdr *sechdrs)
+static void add_sect_attrs(struct module *mod, const struct load_info *info)
{
unsigned int nloaded = 0, i, size[2];
struct module_sect_attrs *sect_attrs;
@@ -1173,8 +1173,8 @@ static void add_sect_attrs(struct module *mod, unsigned int nsect,
struct attribute **gattr;
/* Count loaded sections and allocate structures */
- for (i = 0; i < nsect; i++)
- if (!sect_empty(&sechdrs[i]))
+ for (i = 0; i < info->hdr->e_shnum; i++)
+ if (!sect_empty(&info->sechdrs[i]))
nloaded++;
size[0] = ALIGN(sizeof(*sect_attrs)
+ nloaded * sizeof(sect_attrs->attrs[0]),
@@ -1191,11 +1191,12 @@ static void add_sect_attrs(struct module *mod, unsigned int nsect,
sect_attrs->nsections = 0;
sattr = &sect_attrs->attrs[0];
gattr = &sect_attrs->grp.attrs[0];
- for (i = 0; i < nsect; i++) {
- if (sect_empty(&sechdrs[i]))
+ for (i = 0; i < info->hdr->e_shnum; i++) {
+ Elf_Shdr *sec = &info->sechdrs[i];
+ if (sect_empty(sec))
continue;
- sattr->address = sechdrs[i].sh_addr;
- sattr->name = kstrdup(secstrings + sechdrs[i].sh_name,
+ sattr->address = sec->sh_addr;
+ sattr->name = kstrdup(info->secstrings + sec->sh_name,
GFP_KERNEL);
if (sattr->name == NULL)
goto out;
@@ -1263,8 +1264,7 @@ static void free_notes_attrs(struct module_notes_attrs *notes_attrs,
kfree(notes_attrs);
}
-static void add_notes_attrs(struct module *mod, unsigned int nsect,
- char *secstrings, Elf_Shdr *sechdrs)
+static void add_notes_attrs(struct module *mod, const struct load_info *info)
{
unsigned int notes, loaded, i;
struct module_notes_attrs *notes_attrs;
@@ -1276,9 +1276,9 @@ static void add_notes_attrs(struct module *mod, unsigned int nsect,
/* Count notes sections and allocate structures. */
notes = 0;
- for (i = 0; i < nsect; i++)
- if (!sect_empty(&sechdrs[i]) &&
- (sechdrs[i].sh_type == SHT_NOTE))
+ for (i = 0; i < info->hdr->e_shnum; i++)
+ if (!sect_empty(&info->sechdrs[i]) &&
+ (info->sechdrs[i].sh_type == SHT_NOTE))
++notes;
if (notes == 0)
@@ -1292,15 +1292,15 @@ static void add_notes_attrs(struct module *mod, unsigned int nsect,
notes_attrs->notes = notes;
nattr = &notes_attrs->attrs[0];
- for (loaded = i = 0; i < nsect; ++i) {
- if (sect_empty(&sechdrs[i]))
+ for (loaded = i = 0; i < info->hdr->e_shnum; ++i) {
+ if (sect_empty(&info->sechdrs[i]))
continue;
- if (sechdrs[i].sh_type == SHT_NOTE) {
+ if (info->sechdrs[i].sh_type == SHT_NOTE) {
sysfs_bin_attr_init(nattr);
nattr->attr.name = mod->sect_attrs->attrs[loaded].name;
nattr->attr.mode = S_IRUGO;
- nattr->size = sechdrs[i].sh_size;
- nattr->private = (void *) sechdrs[i].sh_addr;
+ nattr->size = info->sechdrs[i].sh_size;
+ nattr->private = (void *) info->sechdrs[i].sh_addr;
nattr->read = module_notes_read;
++nattr;
}
@@ -1331,8 +1331,8 @@ static void remove_notes_attrs(struct module *mod)
#else
-static inline void add_sect_attrs(struct module *mod, unsigned int nsect,
- char *sectstrings, Elf_Shdr *sechdrs)
+static inline void add_sect_attrs(struct module *mod,
+ const struct load_info *info)
{
}
@@ -1340,17 +1340,16 @@ static inline void remove_sect_attrs(struct module *mod)
{
}
-static inline void add_notes_attrs(struct module *mod, unsigned int nsect,
- char *sectstrings, Elf_Shdr *sechdrs)
+static inline void add_notes_attrs(struct module *mod,
+ const struct load_info *info)
{
}
static inline void remove_notes_attrs(struct module *mod)
{
}
-#endif
+#endif /* CONFIG_KALLSYMS */
-#ifdef CONFIG_SYSFS
static void add_usage_links(struct module *mod)
{
#ifdef CONFIG_MODULE_UNLOAD
@@ -1455,6 +1454,7 @@ out:
}
static int mod_sysfs_setup(struct module *mod,
+ const struct load_info *info,
struct kernel_param *kparam,
unsigned int num_params)
{
@@ -1479,6 +1479,8 @@ static int mod_sysfs_setup(struct module *mod,
goto out_unreg_param;
add_usage_links(mod);
+ add_sect_attrs(mod, info);
+ add_notes_attrs(mod, info);
kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD);
return 0;
@@ -1495,32 +1497,26 @@ out:
static void mod_sysfs_fini(struct module *mod)
{
+ remove_notes_attrs(mod);
+ remove_sect_attrs(mod);
kobject_put(&mod->mkobj.kobj);
}
-#else /* CONFIG_SYSFS */
+#else /* !CONFIG_SYSFS */
-static inline int mod_sysfs_init(struct module *mod)
+static int mod_sysfs_init(struct module *mod)
{
return 0;
}
-static inline int mod_sysfs_setup(struct module *mod,
+static int mod_sysfs_setup(struct module *mod,
+ const struct load_info *info,
struct kernel_param *kparam,
unsigned int num_params)
{
return 0;
}
-static inline int module_add_modinfo_attrs(struct module *mod)
-{
- return 0;
-}
-
-static inline void module_remove_modinfo_attrs(struct module *mod)
-{
-}
-
static void mod_sysfs_fini(struct module *mod)
{
}
@@ -1561,8 +1557,6 @@ static void free_module(struct module *mod)
mutex_lock(&module_mutex);
stop_machine(__unlink_module, mod, NULL);
mutex_unlock(&module_mutex);
- remove_notes_attrs(mod);
- remove_sect_attrs(mod);
mod_kobject_remove(mod);
/* Remove dynamic debug info */
@@ -2691,13 +2685,10 @@ static noinline struct module *load_module(void __user *umod,
if (err < 0)
goto unlink;
- err = mod_sysfs_setup(mod, mod->kp, mod->num_kp);
+ err = mod_sysfs_setup(mod, &info, mod->kp, mod->num_kp);
if (err < 0)
goto unlink;
- add_sect_attrs(mod, info.hdr->e_shnum, info.secstrings, info.sechdrs);
- add_notes_attrs(mod, info.hdr->e_shnum, info.secstrings, info.sechdrs);
-
/* Get rid of temporary copy and strmap. */
kfree(info.strmap);
free_copy(&info);