patch-2.1.52 linux/fs/smbfs/mmap.c

• Lines: 127
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.1.51/linux/fs/smbfs/mmap.c
• Orig date: Mon Aug 18 18:19:46 1997

diff -u --recursive --new-file v2.1.51/linux/fs/smbfs/mmap.c linux/fs/smbfs/mmap.c
@@ -1,126 +0,0 @@
-/*
- *  mmap.c
- *
- *  Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke
- *
- */
-
-#include <linux/stat.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/shm.h>
-#include <linux/errno.h>
-#include <linux/mman.h>
-#include <linux/string.h>
-#include <linux/malloc.h>
-#include <linux/smb_fs.h>
-#include <linux/fcntl.h>
-
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-/*
- * Fill in the supplied page for mmap
- */
-static unsigned long
-smb_file_mmap_nopage(struct vm_area_struct *area,
-		     unsigned long address, int no_share)
-{
-	struct inode *inode = area->vm_dentry->d_inode;
-	unsigned long page;
-	unsigned int clear;
-	unsigned long tmp;
-	int n;
-	int i;
-	int pos;
-
-	page = __get_free_page(GFP_KERNEL);
-	if (!page)
-		return 0;
-	address &= PAGE_MASK;
-	pos = address - area->vm_start + area->vm_offset;
-
-	clear = 0;
-	if (address + PAGE_SIZE > area->vm_end)
-	{
-		clear = address + PAGE_SIZE - area->vm_end;
-	}
-	/* what we can read in one go */
-	n = SMB_SERVER(inode)->max_xmit - SMB_HEADER_LEN - 5 * 2 - 3 - 10;
-
-	if (smb_make_open(inode, O_RDONLY) < 0)
-	{
-		clear = PAGE_SIZE;
-	} else
-	{
-
-		for (i = 0; i < (PAGE_SIZE - clear); i += n)
-		{
-			int hunk, result;
-
-			hunk = PAGE_SIZE - i;
-			if (hunk > n)
-				hunk = n;
-
-			DDPRINTK("smb_file_mmap_nopage: reading\n");
-			DDPRINTK("smb_file_mmap_nopage: pos = %d\n", pos);
-			result = smb_proc_read(SMB_SERVER(inode),
-					       SMB_FINFO(inode), pos, hunk,
-					       (char *) (page + i), 0);
-			DDPRINTK("smb_file_mmap_nopage: result= %d\n", result);
-			if (result < 0)
-				break;
-			pos += result;
-			if (result < n)
-			{
-				i += result;
-				break;
-			}
-		}
-	}
-
-	tmp = page + PAGE_SIZE;
-	while (clear--)
-	{
-		*(char *) --tmp = 0;
-	}
-	return page;
-}
-
-struct vm_operations_struct smb_file_mmap =
-{
-	NULL,			/* open */
-	NULL,			/* close */
-	NULL,			/* unmap */
-	NULL,			/* protect */
-	NULL,			/* sync */
-	NULL,			/* advise */
-	smb_file_mmap_nopage,	/* nopage */
-	NULL,			/* wppage */
-	NULL,			/* swapout */
-	NULL,			/* swapin */
-};
-
-
-/* This is used for a general mmap of a smb file */
-int
-smb_mmap(struct inode *inode, struct file *file, struct vm_area_struct *vma)
-{
-	DPRINTK("smb_mmap: called\n");
-
-	/* only PAGE_COW or read-only supported now */
-	if (vma->vm_flags & VM_SHARED)
-		return -EINVAL;
-	if (!inode->i_sb || !S_ISREG(inode->i_mode))
-		return -EACCES;
-	if (!IS_RDONLY(inode))
-	{
-		inode->i_atime = CURRENT_TIME;
-		mark_inode_dirty(inode);
-	}
-
-	vma->vm_dentry = dget(file->f_dentry);
-	vma->vm_ops = &smb_file_mmap;
-	return 0;
-}