patch-2.1.21 linux/fs/xiafs/symlink.c

• Lines: 121
• Date: Thu Jan 1 02:00:00 1970
• Orig file: v2.1.20/linux/fs/xiafs/symlink.c
• Orig date: Tue Oct 29 19:58:47 1996

diff -u --recursive --new-file v2.1.20/linux/fs/xiafs/symlink.c linux/fs/xiafs/symlink.c
@@ -1,120 +0,0 @@
-/*
- *  linux/fs/xiafs/symlink.c
- *
- *  Copyright (C) Q. Frank Xia, 1993.
- *  
- *  Based on Linus' minix/symlink.c
- *  Copyright (C) Linus Torvalds, 1991, 1992.
- *
- *  This software may be redistributed per Linux Copyright.
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/fs.h>
-#include <linux/xia_fs.h>
-#include <linux/stat.h>
-
-#include <asm/uaccess.h>
-
-static int 
-xiafs_readlink(struct inode *, char *, int);
-
-static int 
-xiafs_follow_link(struct inode *, struct inode *, int, int, struct inode **);
-
-/*
- * symlinks can't do much...
- */
-struct inode_operations xiafs_symlink_inode_operations = {
-	NULL,			/* no file-operations */
-	NULL,			/* create */
-	NULL,			/* lookup */
-	NULL,			/* link */
-	NULL,			/* unlink */
-	NULL,			/* symlink */
-	NULL,			/* mkdir */
-	NULL,			/* rmdir */
-	NULL,			/* mknod */
-	NULL,			/* rename */
-	xiafs_readlink,		/* readlink */
-	xiafs_follow_link,	/* follow_link */
-	NULL,			/* readpage */
-	NULL,			/* writepage */
-	NULL,			/* bmap */
-	NULL,			/* truncate */
-	NULL			/* permission */
-};
-
-static int xiafs_readlink(struct inode * inode, char * buffer, int buflen)
-{
-    struct buffer_head * bh;
-    int i;
-    char c;
-
-    if (!S_ISLNK(inode->i_mode)) {
-        iput(inode);
-	return -EINVAL;
-    }
-    if (buflen > BLOCK_SIZE)
-        buflen = BLOCK_SIZE;
-    bh = xiafs_bread(inode, 0, 0);
-    if (!IS_RDONLY (inode)) {
- 	inode->i_atime=CURRENT_TIME;
- 	inode->i_dirt=1;
-    }
-    iput(inode);
-    if (!bh)
-        return 0;
-    for (i=0; i < buflen && (c=bh->b_data[i]); i++)
-      put_user(c, buffer++);
-    if (i < buflen-1)
-      put_user('\0', buffer);
-    brelse(bh);
-    return i;
-}
-
-static int xiafs_follow_link(struct inode * dir, struct inode * inode,
-	int flag, int mode, struct inode ** res_inode)
-{
-    int error;
-    struct buffer_head * bh;
-
-    *res_inode = NULL;
-    if (!dir) {
-        dir = current->fs->root;
-	dir->i_count++;
-    }
-    if (!inode) {
-        iput(dir);
-	return -ENOENT;
-    }
-    if (!S_ISLNK(inode->i_mode)) {
-        iput(dir);
-	*res_inode = inode;
-	return 0;
-    }
-    if (!IS_RDONLY (inode)) {
-	inode->i_atime=CURRENT_TIME;
-	inode->i_dirt=1;
-    }
-    if (current->link_count > 5) {
-        iput(inode);
-	iput(dir);
-	return -ELOOP;
-    }
-    if (!(bh = xiafs_bread(inode, 0, 0))) {
-        iput(inode);
-        iput(dir);
-	return -EIO;
-    }
-    iput(inode);
-    current->link_count++;
-    error = open_namei(bh->b_data,flag,mode,res_inode,dir);
-    current->link_count--;
-    brelse(bh);
-    return error;
-}
-
-
-