down(&buffer->sem);
if (buffer->needs_read_fill) {
- if ((retval = fill_read_buffer(file->f_dentry,buffer)))
+ if ((retval = fill_read_buffer(file->f_path.dentry,buffer)))
goto out;
}
- pr_debug("%s: count = %d, ppos = %lld, buf = %s\n",
- __FUNCTION__,count,*ppos,buffer->page);
+ pr_debug("%s: count = %zd, ppos = %lld, buf = %s\n",
+ __FUNCTION__, count, *ppos, buffer->page);
retval = flush_read_buffer(buffer,buf,count,ppos);
out:
up(&buffer->sem);
int error;
if (!buffer->page)
- buffer->page = (char *)get_zeroed_page(GFP_KERNEL);
+ buffer->page = (char *)__get_free_pages(GFP_KERNEL, 0);
if (!buffer->page)
return -ENOMEM;
- if (count > PAGE_SIZE)
- count = PAGE_SIZE;
+ if (count >= PAGE_SIZE)
+ count = PAGE_SIZE - 1;
error = copy_from_user(buffer->page,buf,count);
buffer->needs_read_fill = 1;
+ /* if buf is assumed to contain a string, terminate it by \0,
+ * so e.g. sscanf() can scan the string easily */
+ buffer->page[count] = 0;
return error ? -EFAULT : count;
}
down(&buffer->sem);
len = fill_write_buffer(buffer, buf, count);
if (len > 0)
- len = flush_write_buffer(file->f_dentry, buffer, count);
+ len = flush_write_buffer(file->f_path.dentry, buffer, count);
if (len > 0)
*ppos += len;
up(&buffer->sem);
static int check_perm(struct inode * inode, struct file * file)
{
- struct config_item *item = configfs_get_config_item(file->f_dentry->d_parent);
- struct configfs_attribute * attr = to_attr(file->f_dentry);
+ struct config_item *item = configfs_get_config_item(file->f_path.dentry->d_parent);
+ struct configfs_attribute * attr = to_attr(file->f_path.dentry);
struct configfs_buffer * buffer;
struct configfs_item_operations * ops = NULL;
int error = 0;
* it in file->private_data for easy access.
*/
buffer = kzalloc(sizeof(struct configfs_buffer),GFP_KERNEL);
- if (buffer) {
- init_MUTEX(&buffer->sem);
- buffer->needs_read_fill = 1;
- buffer->ops = ops;
- file->private_data = buffer;
- } else
+ if (!buffer) {
error = -ENOMEM;
+ goto Enomem;
+ }
+ init_MUTEX(&buffer->sem);
+ buffer->needs_read_fill = 1;
+ buffer->ops = ops;
+ file->private_data = buffer;
goto Done;
Einval:
goto Done;
Eaccess:
error = -EACCES;
+ Enomem:
module_put(attr->ca_owner);
Done:
if (error && item)
static int configfs_release(struct inode * inode, struct file * filp)
{
- struct config_item * item = to_item(filp->f_dentry->d_parent);
- struct configfs_attribute * attr = to_attr(filp->f_dentry);
+ struct config_item * item = to_item(filp->f_path.dentry->d_parent);
+ struct configfs_attribute * attr = to_attr(filp->f_path.dentry);
struct module * owner = attr->ca_owner;
struct configfs_buffer * buffer = filp->private_data;