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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>
This commit is contained in:
Rusty Russell
parent
d913188c75
commit
8f6d037815
@ -1126,8 +1126,9 @@ static const struct kernel_symbol *resolve_symbol_wait(Elf_Shdr *sechdrs,
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* /sys/module/foo/sections stuff
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* J. Corbet <corbet@lwn.net>
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*/
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#if defined(CONFIG_KALLSYMS) && defined(CONFIG_SYSFS)
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#ifdef CONFIG_SYSFS
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#ifdef CONFIG_KALLSYMS
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static inline bool sect_empty(const Elf_Shdr *sect)
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{
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return !(sect->sh_flags & SHF_ALLOC) || sect->sh_size == 0;
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@ -1164,8 +1165,7 @@ static void free_sect_attrs(struct module_sect_attrs *sect_attrs)
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kfree(sect_attrs);
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}
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static void add_sect_attrs(struct module *mod, unsigned int nsect,
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char *secstrings, Elf_Shdr *sechdrs)
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static void add_sect_attrs(struct module *mod, const struct load_info *info)
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{
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unsigned int nloaded = 0, i, size[2];
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struct module_sect_attrs *sect_attrs;
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@ -1173,8 +1173,8 @@ static void add_sect_attrs(struct module *mod, unsigned int nsect,
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struct attribute **gattr;
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/* Count loaded sections and allocate structures */
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for (i = 0; i < nsect; i++)
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if (!sect_empty(&sechdrs[i]))
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for (i = 0; i < info->hdr->e_shnum; i++)
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if (!sect_empty(&info->sechdrs[i]))
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nloaded++;
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size[0] = ALIGN(sizeof(*sect_attrs)
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+ nloaded * sizeof(sect_attrs->attrs[0]),
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@ -1191,11 +1191,12 @@ static void add_sect_attrs(struct module *mod, unsigned int nsect,
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sect_attrs->nsections = 0;
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sattr = §_attrs->attrs[0];
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gattr = §_attrs->grp.attrs[0];
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for (i = 0; i < nsect; i++) {
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if (sect_empty(&sechdrs[i]))
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for (i = 0; i < info->hdr->e_shnum; i++) {
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Elf_Shdr *sec = &info->sechdrs[i];
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if (sect_empty(sec))
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continue;
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sattr->address = sechdrs[i].sh_addr;
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sattr->name = kstrdup(secstrings + sechdrs[i].sh_name,
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sattr->address = sec->sh_addr;
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sattr->name = kstrdup(info->secstrings + sec->sh_name,
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GFP_KERNEL);
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if (sattr->name == NULL)
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goto out;
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@ -1263,8 +1264,7 @@ static void free_notes_attrs(struct module_notes_attrs *notes_attrs,
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kfree(notes_attrs);
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}
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static void add_notes_attrs(struct module *mod, unsigned int nsect,
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char *secstrings, Elf_Shdr *sechdrs)
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static void add_notes_attrs(struct module *mod, const struct load_info *info)
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{
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unsigned int notes, loaded, i;
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struct module_notes_attrs *notes_attrs;
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@ -1276,9 +1276,9 @@ static void add_notes_attrs(struct module *mod, unsigned int nsect,
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/* Count notes sections and allocate structures. */
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notes = 0;
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for (i = 0; i < nsect; i++)
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if (!sect_empty(&sechdrs[i]) &&
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(sechdrs[i].sh_type == SHT_NOTE))
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for (i = 0; i < info->hdr->e_shnum; i++)
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if (!sect_empty(&info->sechdrs[i]) &&
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(info->sechdrs[i].sh_type == SHT_NOTE))
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++notes;
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if (notes == 0)
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@ -1292,15 +1292,15 @@ static void add_notes_attrs(struct module *mod, unsigned int nsect,
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notes_attrs->notes = notes;
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nattr = ¬es_attrs->attrs[0];
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for (loaded = i = 0; i < nsect; ++i) {
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if (sect_empty(&sechdrs[i]))
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for (loaded = i = 0; i < info->hdr->e_shnum; ++i) {
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if (sect_empty(&info->sechdrs[i]))
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continue;
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if (sechdrs[i].sh_type == SHT_NOTE) {
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if (info->sechdrs[i].sh_type == SHT_NOTE) {
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sysfs_bin_attr_init(nattr);
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nattr->attr.name = mod->sect_attrs->attrs[loaded].name;
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nattr->attr.mode = S_IRUGO;
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nattr->size = sechdrs[i].sh_size;
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nattr->private = (void *) sechdrs[i].sh_addr;
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nattr->size = info->sechdrs[i].sh_size;
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nattr->private = (void *) info->sechdrs[i].sh_addr;
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nattr->read = module_notes_read;
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++nattr;
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}
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@ -1331,8 +1331,8 @@ static void remove_notes_attrs(struct module *mod)
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#else
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static inline void add_sect_attrs(struct module *mod, unsigned int nsect,
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char *sectstrings, Elf_Shdr *sechdrs)
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static inline void add_sect_attrs(struct module *mod,
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const struct load_info *info)
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{
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}
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@ -1340,17 +1340,16 @@ static inline void remove_sect_attrs(struct module *mod)
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{
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}
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static inline void add_notes_attrs(struct module *mod, unsigned int nsect,
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char *sectstrings, Elf_Shdr *sechdrs)
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static inline void add_notes_attrs(struct module *mod,
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const struct load_info *info)
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{
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}
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static inline void remove_notes_attrs(struct module *mod)
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{
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}
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#endif
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#endif /* CONFIG_KALLSYMS */
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#ifdef CONFIG_SYSFS
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static void add_usage_links(struct module *mod)
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{
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#ifdef CONFIG_MODULE_UNLOAD
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@ -1455,6 +1454,7 @@ out:
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}
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static int mod_sysfs_setup(struct module *mod,
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const struct load_info *info,
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struct kernel_param *kparam,
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unsigned int num_params)
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{
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@ -1479,6 +1479,8 @@ static int mod_sysfs_setup(struct module *mod,
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goto out_unreg_param;
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add_usage_links(mod);
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add_sect_attrs(mod, info);
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add_notes_attrs(mod, info);
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kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD);
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return 0;
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@ -1495,32 +1497,26 @@ out:
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static void mod_sysfs_fini(struct module *mod)
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{
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remove_notes_attrs(mod);
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remove_sect_attrs(mod);
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kobject_put(&mod->mkobj.kobj);
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}
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#else /* CONFIG_SYSFS */
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#else /* !CONFIG_SYSFS */
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static inline int mod_sysfs_init(struct module *mod)
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static int mod_sysfs_init(struct module *mod)
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{
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return 0;
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}
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static inline int mod_sysfs_setup(struct module *mod,
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static int mod_sysfs_setup(struct module *mod,
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const struct load_info *info,
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struct kernel_param *kparam,
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unsigned int num_params)
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{
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return 0;
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}
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static inline int module_add_modinfo_attrs(struct module *mod)
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{
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return 0;
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}
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static inline void module_remove_modinfo_attrs(struct module *mod)
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{
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}
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static void mod_sysfs_fini(struct module *mod)
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{
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}
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@ -1561,8 +1557,6 @@ static void free_module(struct module *mod)
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mutex_lock(&module_mutex);
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stop_machine(__unlink_module, mod, NULL);
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mutex_unlock(&module_mutex);
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remove_notes_attrs(mod);
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remove_sect_attrs(mod);
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mod_kobject_remove(mod);
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/* Remove dynamic debug info */
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@ -2691,13 +2685,10 @@ static noinline struct module *load_module(void __user *umod,
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if (err < 0)
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goto unlink;
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err = mod_sysfs_setup(mod, mod->kp, mod->num_kp);
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err = mod_sysfs_setup(mod, &info, mod->kp, mod->num_kp);
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if (err < 0)
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goto unlink;
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add_sect_attrs(mod, info.hdr->e_shnum, info.secstrings, info.sechdrs);
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add_notes_attrs(mod, info.hdr->e_shnum, info.secstrings, info.sechdrs);
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/* Get rid of temporary copy and strmap. */
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kfree(info.strmap);
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free_copy(&info);
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