patch-2.3.32 linux/fs/umsdos/symlink.c

• Lines: 149
• Date: Mon Dec 13 07:59:51 1999
• Orig file: v2.3.31/linux/fs/umsdos/symlink.c
• Orig date: Tue Dec 7 09:32:49 1999

diff -u --recursive --new-file v2.3.31/linux/fs/umsdos/symlink.c linux/fs/umsdos/symlink.c
@@ -5,141 +5,18 @@
  *      inspired from linux/fs/msdos/file.c Werner Almesberger
  *
  *  Extended MS-DOS regular file handling primitives
+ *
+ *  Wow. It looks like we could support them on FAT with little (if any)
+ *  problems. Oh, well...
  */
 
-#include <linux/sched.h>
 #include <linux/fs.h>
 #include <linux/msdos_fs.h>
-#include <linux/errno.h>
-#include <linux/fcntl.h>
-#include <linux/stat.h>
-#include <linux/umsdos_fs.h>
-#include <linux/malloc.h>
-
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-static struct file_operations umsdos_symlink_operations;
-
-
-/*
- * Read the data associate with the symlink.
- * Return length read in buffer or  a negative error code.
- * 
- */
-
-int umsdos_readlink_x (	     struct dentry *dentry,
-			     char *buffer,
-			     int bufsiz)
-{
-	size_t size = dentry->d_inode->i_size;
-	loff_t loffs = 0;
-	ssize_t ret;
-	struct file filp;
-
-Printk((KERN_DEBUG "UMSDOS_read: %s/%s, size=%u\n",
-dentry->d_parent->d_name.name, dentry->d_name.name, size));
-
-	fill_new_filp (&filp, dentry);
-	filp.f_reada = 0;
-	filp.f_flags = O_RDONLY;
-	filp.f_op    = &umsdos_symlink_operations;
-
-	if (size > bufsiz)
-		size = bufsiz;
-
-	ret = fat_file_read (&filp, buffer, size, &loffs);
-	if (ret != size) {
-		ret = -EIO;
-	}
-	return ret;
-}
-
-
-
-static int UMSDOS_readlink (struct dentry *dentry, char *buffer, int buflen)
-{
-	return umsdos_readlink_x (dentry, buffer, buflen);
-}
-
-/* this one mostly stolen from romfs :) */
-static struct dentry *UMSDOS_followlink (struct dentry *dentry, 
-					struct dentry *base,
-					unsigned int follow)
-{
-	struct inode *inode = dentry->d_inode;
-	char *symname;
-	int len, cnt;
-	mm_segment_t old_fs = get_fs ();
-
-Printk((KERN_DEBUG "UMSDOS_followlink /mn/: (%s/%s)\n",
-dentry->d_parent->d_name.name, dentry->d_name.name));
-
-	len = inode->i_size;
-
-	if (!(symname = kmalloc (len + 1, GFP_KERNEL))) {
-		dentry = ERR_PTR (-ENOMEM);
-		goto outnobuf;
-	}
-
-	set_fs (KERNEL_DS);	/* we read into kernel space this time */
-	cnt = umsdos_readlink_x (dentry, symname, len);
-	set_fs (old_fs);
-
-	if (len != cnt) {
-		dentry = ERR_PTR (-EIO);
-		goto out;
-	}
-
-	symname[len] = 0;
-	dentry = lookup_dentry (symname, base, follow);
-	kfree (symname);
-
-	if (0) {
-	      out:
-		kfree (symname);
-	      outnobuf:
-		dput (base);
-	}
-	return dentry;
-}
-
-/* needed to patch the file structure */
-static struct file_operations umsdos_symlink_operations =
-{
-	NULL,			/* lseek - default */
-	NULL,			/* read */
-	NULL,			/* write */
-	NULL,			/* readdir - bad */
-	NULL,			/* poll - default */
-	NULL,			/* ioctl - default */
-	NULL,			/* mmap */
-	NULL,			/* no special open is needed */
-	NULL,			/* no flush code */
-	NULL,			/* release */
-	NULL			/* fsync */
-};
-
 
 struct inode_operations umsdos_symlink_inode_operations =
 {
-	NULL,			/* default file operations (none) */
-	NULL,			/* create */
-	NULL,			/* lookup */
-	NULL,			/* link */
-	NULL,			/* unlink */
-	NULL,			/* symlink */
-	NULL,			/* mkdir */
-	NULL,			/* rmdir */
-	NULL,			/* mknod */
-	NULL,			/* rename */
-	UMSDOS_readlink,	/* readlink */
-	UMSDOS_followlink,	/* followlink */
-	fat_get_block,		/* get_block */
-	block_read_full_page,	/* readpage */
-	NULL,			/* writepage */
-	NULL,			/* truncate */
-	NULL,			/* permission */
-	NULL			/* revalidate */
+	readlink:	page_readlink,
+	follow_link:	page_follow_link,
+	get_block:	fat_get_block,
+	readpage:	block_read_full_page
 };
-