Import of Linux 2.2.12 subset (ipv4 stack and related)

1 files changed, 71 insertions, 0 deletions

diff --git a/pfinet/linux-src/include/linux/file.h b/pfinet/linux-src/include/linux/file.h
new file mode 100644
index 00000000..05f388f0
--- /dev/null
+++ b/pfinet/linux-src/include/linux/file.h
@@ -0,0 +1,71 @@
+/*
+ * Wrapper functions for accessing the file_struct fd array.
+ */
+
+#ifndef __LINUX_FILE_H
+#define __LINUX_FILE_H
+
+extern void __fput(struct file *);
+
+/*
+ * Check whether the specified task has the fd open. Since the task
+ * may not have a files_struct, we must test for p->files != NULL.
+ */
+extern inline struct file * fcheck_task(struct task_struct *p, unsigned int fd)
+{
+	struct file * file = NULL;
+
+	if (p->files && fd < p->files->max_fds)
+		file = p->files->fd[fd];
+	return file;
+}
+
+/*
+ * Check whether the specified fd has an open file.
+ */
+extern inline struct file * fcheck(unsigned int fd)
+{
+	struct file * file = NULL;
+
+	if (fd < current->files->max_fds)
+		file = current->files->fd[fd];
+	return file;
+}
+
+extern inline struct file * fget(unsigned int fd)
+{
+	struct file * file = fcheck(fd);
+
+	if (file)
+		file->f_count++;
+	return file;
+}
+
+/*
+ * Install a file pointer in the fd array.
+ */
+extern inline void fd_install(unsigned int fd, struct file *file)
+{
+	current->files->fd[fd] = file;
+}
+
+/*
+ * 23/12/1998 Marcin Dalecki <dalecki@cs.net.pl>: 
+ * 
+ * Since those functions where calling other functions, it was compleatly 
+ * bogous to make them all "extern inline".
+ *
+ * The removal of this pseudo optimization saved me scandaleous:
+ *
+ * 		3756 (i386 arch) 
+ *
+ * precious bytes from my kernel, even without counting all the code compiled
+ * as module!
+ *
+ * I suspect there are many other similar "optimizations" across the
+ * kernel...
+ */
+extern void fput(struct file *file); 
+extern void put_filp(struct file *file);
+
+#endif