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);