diff options
author | Richard Weinberger <richard@nod.at> | 2015-03-30 08:14:16 +0200 |
---|---|---|
committer | Richard Weinberger <richard@nod.at> | 2015-04-12 20:58:24 +0200 |
commit | 973f911f55a0e510dd6db8bbb29cd82ff138d3c0 (patch) | |
tree | 6827110eb50b3d20773d893298eaf751583c4b13 /kernel/exec_domain.c | |
parent | 3c7a49d0745a82845f017929eefa9ac1ad117355 (diff) |
Remove execution domain support
All users of exec_domain are gone, now we can get rid
of that abandoned feature.
To not break existing userspace we keep a dummy
/proc/execdomains file which will always contain
"0-0 Linux [kernel]".
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'kernel/exec_domain.c')
-rw-r--r-- | kernel/exec_domain.c | 100 |
1 files changed, 1 insertions, 99 deletions
diff --git a/kernel/exec_domain.c b/kernel/exec_domain.c index 83d4382f5699..b2fb57d6b9b2 100644 --- a/kernel/exec_domain.c +++ b/kernel/exec_domain.c @@ -20,13 +20,7 @@ #include <linux/types.h> #include <linux/fs_struct.h> - static void default_handler(int, struct pt_regs *); - -static struct exec_domain *exec_domains = &default_exec_domain; -static DEFINE_RWLOCK(exec_domains_lock); - - static unsigned long ident_map[32] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, @@ -55,94 +49,9 @@ default_handler(int segment, struct pt_regs *regp) send_sig(SIGSEGV, current, 1); } -static struct exec_domain * -lookup_exec_domain(unsigned int personality) -{ - unsigned int pers = personality(personality); - struct exec_domain *ep; - - read_lock(&exec_domains_lock); - for (ep = exec_domains; ep; ep = ep->next) { - if (pers >= ep->pers_low && pers <= ep->pers_high) - if (try_module_get(ep->module)) - goto out; - } - -#ifdef CONFIG_MODULES - read_unlock(&exec_domains_lock); - request_module("personality-%d", pers); - read_lock(&exec_domains_lock); - - for (ep = exec_domains; ep; ep = ep->next) { - if (pers >= ep->pers_low && pers <= ep->pers_high) - if (try_module_get(ep->module)) - goto out; - } -#endif - - ep = &default_exec_domain; -out: - read_unlock(&exec_domains_lock); - return ep; -} - -int -register_exec_domain(struct exec_domain *ep) -{ - struct exec_domain *tmp; - int err = -EBUSY; - - if (ep == NULL) - return -EINVAL; - - if (ep->next != NULL) - return -EBUSY; - - write_lock(&exec_domains_lock); - for (tmp = exec_domains; tmp; tmp = tmp->next) { - if (tmp == ep) - goto out; - } - - ep->next = exec_domains; - exec_domains = ep; - err = 0; - -out: - write_unlock(&exec_domains_lock); - return err; -} -EXPORT_SYMBOL(register_exec_domain); - -int -unregister_exec_domain(struct exec_domain *ep) -{ - struct exec_domain **epp; - - epp = &exec_domains; - write_lock(&exec_domains_lock); - for (epp = &exec_domains; *epp; epp = &(*epp)->next) { - if (ep == *epp) - goto unregister; - } - write_unlock(&exec_domains_lock); - return -EINVAL; - -unregister: - *epp = ep->next; - ep->next = NULL; - write_unlock(&exec_domains_lock); - return 0; -} -EXPORT_SYMBOL(unregister_exec_domain); - int __set_personality(unsigned int personality) { - struct exec_domain *oep = current_thread_info()->exec_domain; - - current_thread_info()->exec_domain = lookup_exec_domain(personality); current->personality = personality; - module_put(oep->module); return 0; } @@ -151,14 +60,7 @@ EXPORT_SYMBOL(__set_personality); #ifdef CONFIG_PROC_FS static int execdomains_proc_show(struct seq_file *m, void *v) { - struct exec_domain *ep; - - read_lock(&exec_domains_lock); - for (ep = exec_domains; ep; ep = ep->next) - seq_printf(m, "%d-%d\t%-16s\t[%s]\n", - ep->pers_low, ep->pers_high, ep->name, - module_name(ep->module)); - read_unlock(&exec_domains_lock); + seq_puts(m, "0-0\tLinux \t[kernel]\n"); return 0; } |