patch-2.0.27 linux/fs/smbfs/mmap.c

• Lines: 140
• Date: Sun Dec 1 15:58:05 1996
• Orig file: v2.0.26/linux/fs/smbfs/mmap.c
• Orig date: Wed Jun 5 13:22:48 1996

diff -u --recursive --new-file v2.0.26/linux/fs/smbfs/mmap.c linux/fs/smbfs/mmap.c
@@ -1,7 +1,7 @@
 /*
  *  mmap.c
  *
- *  Copyright (C) 1995 by Paal-Kr. Engstad and Volker Lendecke
+ *  Copyright (C) 1995, 1996 by Paal-Kr. Engstad and Volker Lendecke
  *
  */
 
@@ -23,11 +23,11 @@
 /*
  * Fill in the supplied page for mmap
  */
-static unsigned long 
-smb_file_mmap_nopage(struct vm_area_struct * area,
+static unsigned long
+smb_file_mmap_nopage(struct vm_area_struct *area,
 		     unsigned long address, int no_share)
 {
-	struct inode * inode = area->vm_inode;
+	struct inode *inode = area->vm_inode;
 	unsigned long page;
 	unsigned int clear;
 	unsigned long tmp;
@@ -42,50 +42,54 @@
 	pos = address - area->vm_start + area->vm_offset;
 
 	clear = 0;
-	if (address + PAGE_SIZE > area->vm_end) {
+	if (address + PAGE_SIZE > area->vm_end)
+	{
 		clear = address + PAGE_SIZE - area->vm_end;
 	}
-
-        /* what we can read in one go */
+	/* 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;
-                        }
-                }
-        }
+	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;
+	while (clear--)
+	{
+		*(char *) --tmp = 0;
 	}
 	return page;
 }
 
-struct vm_operations_struct smb_file_mmap = {
+struct vm_operations_struct smb_file_mmap =
+{
 	NULL,			/* open */
 	NULL,			/* close */
 	NULL,			/* unmap */
@@ -101,20 +105,20 @@
 
 /* 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)
+smb_mmap(struct inode *inode, struct file *file, struct vm_area_struct *vma)
 {
-        DPRINTK("smb_mmap: called\n");
+	DPRINTK("smb_mmap: called\n");
 
-        /* only PAGE_COW or read-only supported now */
-	if (vma->vm_flags & VM_SHARED)	
+	/* 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)) {
+	if (!IS_RDONLY(inode))
+	{
 		inode->i_atime = CURRENT_TIME;
 		inode->i_dirt = 1;
 	}
-
 	vma->vm_inode = inode;
 	inode->i_count++;
 	vma->vm_ops = &smb_file_mmap;