The patch titled
devscontrol: extend the drivers/base/map.c functionality
has been removed from the -mm tree. Its filename was
devscontrol-extend-the-drivers-base-mapc-functionality.patch
This patch was dropped because of bunfight
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: devscontrol: extend the drivers/base/map.c functionality
From: Pavel Emelyanov <xemul@xxxxxxxxxx>
This includes the following functions:
1. kobj_remap - this one will change the mapping's permissions
or add a new one if required.
2. kobj_map_iterate will walk the map, calling the callback
on each element.
3. kobj_map_fini is a rollback for kobj_map_finid - cleans all
the mappings.
Signed-off-by: Pavel Emelyanov <xemul@xxxxxxxxxx>
Cc: Paul Menage <menage@xxxxxxxxxx>
Cc: Sukadev Bhattiprolu <sukadev@xxxxxxxxxx>
Cc: Serge Hallyn <serue@xxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Cc: Kay Sievers <kay.sievers@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/base/map.c | 84 +++++++++++++++++++++++++++++++++++++
include/linux/kobj_map.h | 6 ++
2 files changed, 90 insertions(+)
diff -puN drivers/base/map.c~devscontrol-extend-the-drivers-base-mapc-functionality drivers/base/map.c
--- a/drivers/base/map.c~devscontrol-extend-the-drivers-base-mapc-functionality
+++ a/drivers/base/map.c
@@ -181,3 +181,87 @@ struct kobj_map *kobj_map_init(kobj_prob
p->lock = lock;
return p;
}
+
+#ifdef CONFIG_CGROUP_DEVS
+int kobj_remap(struct kobj_map *domain, dev_t dev, mode_t mode,
+ unsigned long range, struct module *module,
+ kobj_probe_t *probe, int (*lock)(dev_t, void *), void *data)
+{
+ unsigned n = MAJOR(dev + range - 1) - MAJOR(dev) + 1;
+ unsigned index = MAJOR(dev);
+ unsigned i;
+ int err = -ESRCH;
+
+ if (n > KOBJ_MAP_PROBES)
+ n = KOBJ_MAP_PROBES;
+
+ mutex_lock(domain->lock);
+ for (i = 0; i < n; i++, index++) {
+ struct probe **s;
+ for (s = &domain->probes[index % KOBJ_MAP_PROBES];
+ *s; s = &(*s)->next) {
+ struct probe *p = *s;
+ if (p->dev == dev) {
+ p->mode = mode | FMODE_LSEEK |
+ FMODE_PREAD | FMODE_PWRITE;
+ err = 0;
+ break;
+ }
+ }
+ }
+
+ if (err)
+ err = __kobj_map(domain, dev, mode, range, module,
+ probe, lock, data);
+ mutex_unlock(domain->lock);
+ return err;
+}
+
+void kobj_map_iterate(struct kobj_map *domain,
+ int (*fn)(dev_t, int, mode_t, void *), void *arg)
+{
+ int i;
+ struct probe *p;
+ dev_t skip = MKDEV(0, 0);
+
+ mutex_lock(domain->lock);
+ for (i = 0; i < KOBJ_MAP_PROBES; i++) {
+ p = domain->probes[i];
+ while (p != NULL) {
+ if (p->dev == skip)
+ goto next;
+ /*
+ * this 'device' is special - see the kobj_map_init why
+ */
+ if (p->dev == 1)
+ goto next;
+
+ skip = p->dev;
+ if (fn(p->dev, p->range, p->mode, arg))
+ goto done;
+next:
+ p = p->next;
+ }
+ }
+done:
+ mutex_unlock(domain->lock);
+}
+
+void kobj_map_fini(struct kobj_map *map)
+{
+ int i;
+ struct probe *p, *next;
+
+ for (i = 0; i < KOBJ_MAP_PROBES; i++) {
+ p = map->probes[i];
+ while (p->next != NULL) {
+ next = p->next;
+ kfree(p);
+ p = next;
+ }
+ }
+
+ kfree(p);
+ kfree(map);
+}
+#endif
diff -puN include/linux/kobj_map.h~devscontrol-extend-the-drivers-base-mapc-functionality include/linux/kobj_map.h
--- a/include/linux/kobj_map.h~devscontrol-extend-the-drivers-base-mapc-functionality
+++ a/include/linux/kobj_map.h
@@ -11,4 +11,10 @@ void kobj_unmap(struct kobj_map *, dev_t
struct kobject *kobj_lookup(struct kobj_map *, dev_t, mode_t *, int *);
struct kobj_map *kobj_map_init(kobj_probe_t *, struct mutex *);
+void kobj_map_iterate(struct kobj_map *, int (*fn)(dev_t, int, mode_t, void *),
+ void *);
+int kobj_remap(struct kobj_map *, dev_t, mode_t, unsigned long, struct module *,
+ kobj_probe_t *, int (*)(dev_t, void *), void *);
+void kobj_map_fini(struct kobj_map *);
+
#endif
_
Patches currently in -mm which might be from xemul@xxxxxxxxxx are
git-kgdb-light.patch
use-find_task_by_vpid-in-audit-code.patch
ia64-fix-getpid-and-set_tid_address-fast-system-calls-for-pid-namespaces.patch
git-udf.patch
cgroup-api-files-rename-read-write_uint-methods-to-read_write_u64.patch
cgroup-api-files-add-res_counter_read_u64.patch
cgroup-api-files-use-read_u64-in-memory-controller.patch
cgroup-api-files-strip-all-trailing-whitespace-in-cgroup_write_u64.patch
cgroup-api-files-update-cpusets-to-use-cgroup-structured-file-api.patch
cgroup-api-files-update-cpusets-to-use-cgroup-structured-file-api-fix.patch
cgroup-api-files-add-cgroup-map-data-type.patch
cgroup-api-files-use-cgroup-map-for-memcontrol-stats-file.patch
cgroup-api-files-drop-mem_cgroup_force_empty.patch
cgroup-api-files-move-releasable-to-cgroup_debug-subsystem.patch
cgroup-api-files-make-cgroup_debug-default-to-off.patch
cgroups-add-cgroup-support-for-enabling-controllers-at-boot-time.patch
memory-controller-make-memory-resource-control-aware-of-boot-options.patch
devscontrol-extend-the-drivers-base-mapc-functionality.patch
devscontrol-provide-functions-to-manipulate-char-device-mappings.patch
devscontrol-provide-functions-to-manipulate-block-device-mappings.patch
devscontrol-devices-accessibility-control-group-itself.patch
remove-unused-variable-from-send_signal.patch
turn-legacy_queue-macro-into-static-inline-function.patch
consolidate-checking-for-ignored-legacy-signals.patch
consolidate-checking-for-ignored-legacy-signals-simplify.patch
signals-consolidate-checks-for-whether-or-not-to-ignore-a-signal.patch
signals-clean-dequeue_signal-from-excess-checks-and-assignments.patch
signals-consolidate-send_sigqueue-and-send_group_sigqueue.patch
signals-cleanup-security_task_kill-usage-implementation.patch
signals-use-__group_complete_signal-for-the-specific-signals-too.patch
signals-fold-complete_signal-into-send_signal-do_send_sigqueue.patch
signals-unify-send_sigqueue-send_group_sigqueue-completely.patch
sysctl-merge-equal-proc_sys_read-and-proc_sys_write.patch
sysctl-clean-from-unneeded-extern-and-forward-declarations.patch
sysctl-add-the-permissions-callback-on-the-ctl_table_root.patch
free_pidmap-turn-it-into-free_pidmapstruct-upid.patch
use-find_task_by_vpid-in-taskstats.patch
deprecate-find_task_by_pid.patch
deprecate-find_task_by_pid-warning-fix.patch
pidns-make-pid-level-and-pid_ns-level-unsigned.patch
reiser4.patch
put_pid-make-sure-we-dont-free-the-live-pid.patch
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