Initial import of modified Linux 2.6.28 tree

Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y

1 files changed, 197 insertions, 0 deletions

diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
new file mode 100644
index 0000000..08dd8ed
--- /dev/null
+++ b/kernel/ksysfs.c
@@ -0,0 +1,197 @@
+/*
+ * kernel/ksysfs.c - sysfs attributes in /sys/kernel, which
+ * 		     are not related to any other subsystem
+ *
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ * 
+ * This file is release under the GPLv2
+ *
+ */
+
+#include <linux/kobject.h>
+#include <linux/string.h>
+#include <linux/sysfs.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kexec.h>
+#include <linux/profile.h>
+#include <linux/sched.h>
+
+#define KERNEL_ATTR_RO(_name) \
+static struct kobj_attribute _name##_attr = __ATTR_RO(_name)
+
+#define KERNEL_ATTR_RW(_name) \
+static struct kobj_attribute _name##_attr = \
+	__ATTR(_name, 0644, _name##_show, _name##_store)
+
+#if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
+/* current uevent sequence number */
+static ssize_t uevent_seqnum_show(struct kobject *kobj,
+				  struct kobj_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%llu\n", (unsigned long long)uevent_seqnum);
+}
+KERNEL_ATTR_RO(uevent_seqnum);
+
+/* uevent helper program, used during early boo */
+static ssize_t uevent_helper_show(struct kobject *kobj,
+				  struct kobj_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%s\n", uevent_helper);
+}
+static ssize_t uevent_helper_store(struct kobject *kobj,
+				   struct kobj_attribute *attr,
+				   const char *buf, size_t count)
+{
+	if (count+1 > UEVENT_HELPER_PATH_LEN)
+		return -ENOENT;
+	memcpy(uevent_helper, buf, count);
+	uevent_helper[count] = '\0';
+	if (count && uevent_helper[count-1] == '\n')
+		uevent_helper[count-1] = '\0';
+	return count;
+}
+KERNEL_ATTR_RW(uevent_helper);
+#endif
+
+#ifdef CONFIG_PROFILING
+static ssize_t profiling_show(struct kobject *kobj,
+				  struct kobj_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", prof_on);
+}
+static ssize_t profiling_store(struct kobject *kobj,
+				   struct kobj_attribute *attr,
+				   const char *buf, size_t count)
+{
+	int ret;
+
+	if (prof_on)
+		return -EEXIST;
+	/*
+	 * This eventually calls into get_option() which
+	 * has a ton of callers and is not const.  It is
+	 * easiest to cast it away here.
+	 */
+	profile_setup((char *)buf);
+	ret = profile_init();
+	if (ret)
+		return ret;
+	ret = create_proc_profile();
+	if (ret)
+		return ret;
+	return count;
+}
+KERNEL_ATTR_RW(profiling);
+#endif
+
+#ifdef CONFIG_KEXEC
+static ssize_t kexec_loaded_show(struct kobject *kobj,
+				 struct kobj_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", !!kexec_image);
+}
+KERNEL_ATTR_RO(kexec_loaded);
+
+static ssize_t kexec_crash_loaded_show(struct kobject *kobj,
+				       struct kobj_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", !!kexec_crash_image);
+}
+KERNEL_ATTR_RO(kexec_crash_loaded);
+
+static ssize_t vmcoreinfo_show(struct kobject *kobj,
+			       struct kobj_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%lx %x\n",
+		       paddr_vmcoreinfo_note(),
+		       (unsigned int)vmcoreinfo_max_size);
+}
+KERNEL_ATTR_RO(vmcoreinfo);
+
+#endif /* CONFIG_KEXEC */
+
+/*
+ * Make /sys/kernel/notes give the raw contents of our kernel .notes section.
+ */
+extern const void __start_notes __attribute__((weak));
+extern const void __stop_notes __attribute__((weak));
+#define	notes_size (&__stop_notes - &__start_notes)
+
+static ssize_t notes_read(struct kobject *kobj, struct bin_attribute *bin_attr,
+			  char *buf, loff_t off, size_t count)
+{
+	memcpy(buf, &__start_notes + off, count);
+	return count;
+}
+
+static struct bin_attribute notes_attr = {
+	.attr = {
+		.name = "notes",
+		.mode = S_IRUGO,
+	},
+	.read = &notes_read,
+};
+
+struct kobject *kernel_kobj;
+EXPORT_SYMBOL_GPL(kernel_kobj);
+
+static struct attribute * kernel_attrs[] = {
+#if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
+	&uevent_seqnum_attr.attr,
+	&uevent_helper_attr.attr,
+#endif
+#ifdef CONFIG_PROFILING
+	&profiling_attr.attr,
+#endif
+#ifdef CONFIG_KEXEC
+	&kexec_loaded_attr.attr,
+	&kexec_crash_loaded_attr.attr,
+	&vmcoreinfo_attr.attr,
+#endif
+	NULL
+};
+
+static struct attribute_group kernel_attr_group = {
+	.attrs = kernel_attrs,
+};
+
+static int __init ksysfs_init(void)
+{
+	int error;
+
+	kernel_kobj = kobject_create_and_add("kernel", NULL);
+	if (!kernel_kobj) {
+		error = -ENOMEM;
+		goto exit;
+	}
+	error = sysfs_create_group(kernel_kobj, &kernel_attr_group);
+	if (error)
+		goto kset_exit;
+
+	if (notes_size > 0) {
+		notes_attr.size = notes_size;
+		error = sysfs_create_bin_file(kernel_kobj, &notes_attr);
+		if (error)
+			goto group_exit;
+	}
+
+	/* create the /sys/kernel/uids/ directory */
+	error = uids_sysfs_init();
+	if (error)
+		goto notes_exit;
+
+	return 0;
+
+notes_exit:
+	if (notes_size > 0)
+		sysfs_remove_bin_file(kernel_kobj, &notes_attr);
+group_exit:
+	sysfs_remove_group(kernel_kobj, &kernel_attr_group);
+kset_exit:
+	kobject_put(kernel_kobj);
+exit:
+	return error;
+}
+
+core_initcall(ksysfs_init);