Linux-2.6.12-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!

fs/ioctl.c

@@ -0,0 +1,186 @@
+/*
+ *  linux/fs/ioctl.c
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ */
+
+#include <linux/config.h>
+#include <linux/syscalls.h>
+#include <linux/mm.h>
+#include <linux/smp_lock.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/security.h>
+#include <linux/module.h>
+
+#include <asm/uaccess.h>
+#include <asm/ioctls.h>
+
+static long do_ioctl(struct file *filp, unsigned int cmd,
+		unsigned long arg)
+{
+	int error = -ENOTTY;
+
+	if (!filp->f_op)
+		goto out;
+
+	if (filp->f_op->unlocked_ioctl) {
+		error = filp->f_op->unlocked_ioctl(filp, cmd, arg);
+		if (error == -ENOIOCTLCMD)
+			error = -EINVAL;
+		goto out;
+	} else if (filp->f_op->ioctl) {
+		lock_kernel();
+		error = filp->f_op->ioctl(filp->f_dentry->d_inode,
+					  filp, cmd, arg);
+		unlock_kernel();
+	}
+
+ out:
+	return error;
+}
+
+static int file_ioctl(struct file *filp, unsigned int cmd,
+		unsigned long arg)
+{
+	int error;
+	int block;
+	struct inode * inode = filp->f_dentry->d_inode;
+	int __user *p = (int __user *)arg;
+
+	switch (cmd) {
+		case FIBMAP:
+		{
+			struct address_space *mapping = filp->f_mapping;
+			int res;
+			/* do we support this mess? */
+			if (!mapping->a_ops->bmap)
+				return -EINVAL;
+			if (!capable(CAP_SYS_RAWIO))
+				return -EPERM;
+			if ((error = get_user(block, p)) != 0)
+				return error;
+
+			lock_kernel();
+			res = mapping->a_ops->bmap(mapping, block);
+			unlock_kernel();
+			return put_user(res, p);
+		}
+		case FIGETBSZ:
+			if (inode->i_sb == NULL)
+				return -EBADF;
+			return put_user(inode->i_sb->s_blocksize, p);
+		case FIONREAD:
+			return put_user(i_size_read(inode) - filp->f_pos, p);
+	}
+
+	return do_ioctl(filp, cmd, arg);
+}
+
+/*
+ * When you add any new common ioctls to the switches above and below
+ * please update compat_sys_ioctl() too.
+ *
+ * vfs_ioctl() is not for drivers and not intended to be EXPORT_SYMBOL()'d.
+ * It's just a simple helper for sys_ioctl and compat_sys_ioctl.
+ */
+int vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd, unsigned long arg)
+{
+	unsigned int flag;
+	int on, error = 0;
+
+	switch (cmd) {
+		case FIOCLEX:
+			set_close_on_exec(fd, 1);
+			break;
+
+		case FIONCLEX:
+			set_close_on_exec(fd, 0);
+			break;
+
+		case FIONBIO:
+			if ((error = get_user(on, (int __user *)arg)) != 0)
+				break;
+			flag = O_NONBLOCK;
+#ifdef __sparc__
+			/* SunOS compatibility item. */
+			if(O_NONBLOCK != O_NDELAY)
+				flag |= O_NDELAY;
+#endif
+			if (on)
+				filp->f_flags |= flag;
+			else
+				filp->f_flags &= ~flag;
+			break;
+
+		case FIOASYNC:
+			if ((error = get_user(on, (int __user *)arg)) != 0)
+				break;
+			flag = on ? FASYNC : 0;
+
+			/* Did FASYNC state change ? */
+			if ((flag ^ filp->f_flags) & FASYNC) {
+				if (filp->f_op && filp->f_op->fasync) {
+					lock_kernel();
+					error = filp->f_op->fasync(fd, filp, on);
+					unlock_kernel();
+				}
+				else error = -ENOTTY;
+			}
+			if (error != 0)
+				break;
+
+			if (on)
+				filp->f_flags |= FASYNC;
+			else
+				filp->f_flags &= ~FASYNC;
+			break;
+
+		case FIOQSIZE:
+			if (S_ISDIR(filp->f_dentry->d_inode->i_mode) ||
+			    S_ISREG(filp->f_dentry->d_inode->i_mode) ||
+			    S_ISLNK(filp->f_dentry->d_inode->i_mode)) {
+				loff_t res = inode_get_bytes(filp->f_dentry->d_inode);
+				error = copy_to_user((loff_t __user *)arg, &res, sizeof(res)) ? -EFAULT : 0;
+			}
+			else
+				error = -ENOTTY;
+			break;
+		default:
+			if (S_ISREG(filp->f_dentry->d_inode->i_mode))
+				error = file_ioctl(filp, cmd, arg);
+			else
+				error = do_ioctl(filp, cmd, arg);
+			break;
+	}
+	return error;
+}
+
+asmlinkage long sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
+{
+	struct file * filp;
+	int error = -EBADF;
+	int fput_needed;
+
+	filp = fget_light(fd, &fput_needed);
+	if (!filp)
+		goto out;
+
+	error = security_file_ioctl(filp, cmd, arg);
+	if (error)
+		goto out_fput;
+
+	error = vfs_ioctl(filp, fd, cmd, arg);
+ out_fput:
+	fput_light(filp, fput_needed);
+ out:
+	return error;
+}
+
+/*
+ * Platforms implementing 32 bit compatibility ioctl handlers in
+ * modules need this exported
+ */
+#ifdef CONFIG_COMPAT
+EXPORT_SYMBOL(sys_ioctl);
+#endif