Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 204 insertions, 0 deletions

diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c
new file mode 100644
index 000000000000..d4aaa88d0214
--- /dev/null
+++ b/fs/sysfs/bin.c
@@ -0,0 +1,204 @@
+/*
+ * bin.c - binary file operations for sysfs.
+ *
+ * Copyright (c) 2003 Patrick Mochel
+ * Copyright (c) 2003 Matthew Wilcox
+ * Copyright (c) 2004 Silicon Graphics, Inc.
+ */
+
+#undef DEBUG
+
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/kobject.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include <asm/uaccess.h>
+
+#include "sysfs.h"
+
+static int
+fill_read(struct dentry *dentry, char *buffer, loff_t off, size_t count)
+{
+	struct bin_attribute * attr = to_bin_attr(dentry);
+	struct kobject * kobj = to_kobj(dentry->d_parent);
+
+	if (!attr->read)
+		return -EINVAL;
+
+	return attr->read(kobj, buffer, off, count);
+}
+
+static ssize_t
+read(struct file * file, char __user * userbuf, size_t count, loff_t * off)
+{
+	char *buffer = file->private_data;
+	struct dentry *dentry = file->f_dentry;
+	int size = dentry->d_inode->i_size;
+	loff_t offs = *off;
+	int ret;
+
+	if (count > PAGE_SIZE)
+		count = PAGE_SIZE;
+
+	if (size) {
+		if (offs > size)
+			return 0;
+		if (offs + count > size)
+			count = size - offs;
+	}
+
+	ret = fill_read(dentry, buffer, offs, count);
+	if (ret < 0) 
+		return ret;
+	count = ret;
+
+	if (copy_to_user(userbuf, buffer, count))
+		return -EFAULT;
+
+	pr_debug("offs = %lld, *off = %lld, count = %zd\n", offs, *off, count);
+
+	*off = offs + count;
+
+	return count;
+}
+
+static int
+flush_write(struct dentry *dentry, char *buffer, loff_t offset, size_t count)
+{
+	struct bin_attribute *attr = to_bin_attr(dentry);
+	struct kobject *kobj = to_kobj(dentry->d_parent);
+
+	if (!attr->write)
+		return -EINVAL;
+
+	return attr->write(kobj, buffer, offset, count);
+}
+
+static ssize_t write(struct file * file, const char __user * userbuf,
+		     size_t count, loff_t * off)
+{
+	char *buffer = file->private_data;
+	struct dentry *dentry = file->f_dentry;
+	int size = dentry->d_inode->i_size;
+	loff_t offs = *off;
+
+	if (count > PAGE_SIZE)
+		count = PAGE_SIZE;
+	if (size) {
+		if (offs > size)
+			return 0;
+		if (offs + count > size)
+			count = size - offs;
+	}
+
+	if (copy_from_user(buffer, userbuf, count))
+		return -EFAULT;
+
+	count = flush_write(dentry, buffer, offs, count);
+	if (count > 0)
+		*off = offs + count;
+	return count;
+}
+
+static int mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct dentry *dentry = file->f_dentry;
+	struct bin_attribute *attr = to_bin_attr(dentry);
+	struct kobject *kobj = to_kobj(dentry->d_parent);
+
+	if (!attr->mmap)
+		return -EINVAL;
+
+	return attr->mmap(kobj, attr, vma);
+}
+
+static int open(struct inode * inode, struct file * file)
+{
+	struct kobject *kobj = sysfs_get_kobject(file->f_dentry->d_parent);
+	struct bin_attribute * attr = to_bin_attr(file->f_dentry);
+	int error = -EINVAL;
+
+	if (!kobj || !attr)
+		goto Done;
+
+	/* Grab the module reference for this attribute if we have one */
+	error = -ENODEV;
+	if (!try_module_get(attr->attr.owner)) 
+		goto Done;
+
+	error = -EACCES;
+	if ((file->f_mode & FMODE_WRITE) && !(attr->write || attr->mmap))
+		goto Error;
+	if ((file->f_mode & FMODE_READ) && !(attr->read || attr->mmap))
+		goto Error;
+
+	error = -ENOMEM;
+	file->private_data = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	if (!file->private_data)
+		goto Error;
+
+	error = 0;
+    goto Done;
+
+ Error:
+	module_put(attr->attr.owner);
+ Done:
+	if (error && kobj)
+		kobject_put(kobj);
+	return error;
+}
+
+static int release(struct inode * inode, struct file * file)
+{
+	struct kobject * kobj = to_kobj(file->f_dentry->d_parent);
+	struct bin_attribute * attr = to_bin_attr(file->f_dentry);
+	u8 * buffer = file->private_data;
+
+	if (kobj) 
+		kobject_put(kobj);
+	module_put(attr->attr.owner);
+	kfree(buffer);
+	return 0;
+}
+
+struct file_operations bin_fops = {
+	.read		= read,
+	.write		= write,
+	.mmap		= mmap,
+	.llseek		= generic_file_llseek,
+	.open		= open,
+	.release	= release,
+};
+
+/**
+ *	sysfs_create_bin_file - create binary file for object.
+ *	@kobj:	object.
+ *	@attr:	attribute descriptor.
+ *
+ */
+
+int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr)
+{
+	BUG_ON(!kobj || !kobj->dentry || !attr);
+
+	return sysfs_add_file(kobj->dentry, &attr->attr, SYSFS_KOBJ_BIN_ATTR);
+}
+
+
+/**
+ *	sysfs_remove_bin_file - remove binary file for object.
+ *	@kobj:	object.
+ *	@attr:	attribute descriptor.
+ *
+ */
+
+int sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr)
+{
+	sysfs_hash_and_remove(kobj->dentry,attr->attr.name);
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(sysfs_create_bin_file);
+EXPORT_SYMBOL_GPL(sysfs_remove_bin_file);