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modules: sysfs - export: taint, coresize, initsize 

Recent tools do not want to use /proc to retrieve module information. A few
values are currently missing from sysfs to replace the information available
in /proc/modules.

This adds /sys/module/*/{coresize,initsize,taint} attributes.

TAINT_PROPRIETARY_MODULE (P) and TAINT_OOT_MODULE (O) flags are both always
shown now, and do no longer exclude each other, also in /proc/modules.

Replace the open-coded sysfs attribute initializers with the __ATTR() macro.

Add the new attributes to Documentation/ABI.

Cc: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Kay Sievers 2012-01-13 09:32:15 +10:30 committed by Rusty Russell
parent 8487bfd954
commit cca3e70730
2 changed files with 80 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
Documentation/ABI/testing/sysfs-module
View File

@ -33,3 +33,19 @@ Description: Maximum time allowed for periodic transfers per microframe (μs)
Beware, non-standard modes are usually not thoroughly tested by
hardware designers, and the hardware can malfunction when this
setting differ from default 100.
What: /sys/module/*/{coresize,initsize}
Date: Jan 2012
KernelVersion:»·3.3
Contact: Kay Sievers <kay.sievers@vrfy.org>
Description: Module size in bytes.
What: /sys/module/*/taint
Date: Jan 2012
KernelVersion:»·3.3
Contact: Kay Sievers <kay.sievers@vrfy.org>
Description: Module taint flags:
P - proprietary module
O - out-of-tree module
F - force-loaded module
C - staging driver module

93
kernel/module.c
View File

@ -842,6 +842,26 @@ out:
return ret;
}
static size_t module_flags_taint(struct module *mod, char *buf)
{
size_t l = 0;
if (mod->taints & (1 << TAINT_PROPRIETARY_MODULE))
buf[l++] = 'P';
if (mod->taints & (1 << TAINT_OOT_MODULE))
buf[l++] = 'O';
if (mod->taints & (1 << TAINT_FORCED_MODULE))
buf[l++] = 'F';
if (mod->taints & (1 << TAINT_CRAP))
buf[l++] = 'C';
/*
* TAINT_FORCED_RMMOD: could be added.
* TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't
* apply to modules.
*/
return l;
}
static inline void print_unload_info(struct seq_file *m, struct module *mod)
{
struct module_use *use;
@ -900,10 +920,8 @@ static ssize_t show_refcnt(struct module_attribute *mattr,
return sprintf(buffer, "%lu\n", module_refcount(mk->mod));
}
static struct module_attribute refcnt = {
.attr = { .name = "refcnt", .mode = 0444 },
.show = show_refcnt,
};
static struct module_attribute modinfo_refcnt =
__ATTR(refcnt, 0444, show_refcnt, NULL);
void module_put(struct module *module)
{
@ -963,10 +981,8 @@ static ssize_t show_initstate(struct module_attribute *mattr,
return sprintf(buffer, "%s\n", state);
}
static struct module_attribute initstate = {
.attr = { .name = "initstate", .mode = 0444 },
.show = show_initstate,
};
static struct module_attribute modinfo_initstate =
__ATTR(initstate, 0444, show_initstate, NULL);
static ssize_t store_uevent(struct module_attribute *mattr,
struct module_kobject *mk,
@ -979,18 +995,50 @@ static ssize_t store_uevent(struct module_attribute *mattr,
return count;
}
struct module_attribute module_uevent = {
.attr = { .name = "uevent", .mode = 0200 },
.store = store_uevent,
};
struct module_attribute module_uevent =
__ATTR(uevent, 0200, NULL, store_uevent);
static ssize_t show_coresize(struct module_attribute *mattr,
struct module_kobject *mk, char *buffer)
{
return sprintf(buffer, "%u\n", mk->mod->core_size);
}
static struct module_attribute modinfo_coresize =
__ATTR(coresize, 0444, show_coresize, NULL);
static ssize_t show_initsize(struct module_attribute *mattr,
struct module_kobject *mk, char *buffer)
{
return sprintf(buffer, "%u\n", mk->mod->init_size);
}
static struct module_attribute modinfo_initsize =
__ATTR(initsize, 0444, show_initsize, NULL);
static ssize_t show_taint(struct module_attribute *mattr,
struct module_kobject *mk, char *buffer)
{
size_t l;
l = module_flags_taint(mk->mod, buffer);
buffer[l++] = '\n';
return l;
}
static struct module_attribute modinfo_taint =
__ATTR(taint, 0444, show_taint, NULL);
static struct module_attribute *modinfo_attrs[] = {
&module_uevent,
&modinfo_version,
&modinfo_srcversion,
&initstate,
&module_uevent,
&modinfo_initstate,
&modinfo_coresize,
&modinfo_initsize,
&modinfo_taint,
#ifdef CONFIG_MODULE_UNLOAD
&refcnt,
&modinfo_refcnt,
#endif
NULL,
};
@ -3236,20 +3284,7 @@ static char *module_flags(struct module *mod, char *buf)
mod->state == MODULE_STATE_GOING ||
mod->state == MODULE_STATE_COMING) {
buf[bx++] = '(';
if (mod->taints & (1 << TAINT_PROPRIETARY_MODULE))
buf[bx++] = 'P';
else if (mod->taints & (1 << TAINT_OOT_MODULE))
buf[bx++] = 'O';
if (mod->taints & (1 << TAINT_FORCED_MODULE))
buf[bx++] = 'F';
if (mod->taints & (1 << TAINT_CRAP))
buf[bx++] = 'C';
/*
* TAINT_FORCED_RMMOD: could be added.
* TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't
* apply to modules.
*/
bx += module_flags_taint(mod, buf + bx);
/* Show a - for module-is-being-unloaded */
if (mod->state == MODULE_STATE_GOING)
buf[bx++] = '-';