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

• Lines: 132
• Date: Thu Dec 9 13:10:18 1999
• Orig file: v2.3.31/linux/fs/coda/symlink.c
• Orig date: Tue Dec 7 09:32:47 1999

diff -u --recursive --new-file v2.3.31/linux/fs/coda/symlink.c linux/fs/coda/symlink.c
@@ -14,9 +14,6 @@
 #include <linux/stat.h>
 #include <linux/errno.h>
 #include <linux/locks.h>
-#include <asm/segment.h>
-#include <asm/uaccess.h>
-#include <linux/string.h>
 
 #include <linux/coda.h>
 #include <linux/coda_linux.h>
@@ -25,97 +22,34 @@
 #include <linux/coda_cache.h>
 #include <linux/coda_proc.h>
 
-static int coda_readlink(struct dentry *de, char *buffer, int length);
-static struct dentry *coda_follow_link(struct dentry *, struct dentry *, 
-				       unsigned int);
-
-struct inode_operations coda_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 */
-	coda_readlink,		/* readlink */
-	coda_follow_link,     	/* follow_link */
-	NULL,			/* get_block */
-	NULL,			/* readpage */
-	NULL,			/* writepage */
-	NULL,			/* truncate */
-	NULL,            	/* permission */
-        NULL                    /* revalidate */
-};
-
-static int coda_readlink(struct dentry *de, char *buffer, int length)
+static int coda_symlink_filler(struct dentry *dentry, struct page *page)
 {
-	struct inode *inode = de->d_inode;
-        int len;
-	int error;
-        char *buf;
-	struct coda_inode_info *cp;
-        ENTRY;
-
-        cp = ITOC(inode);
-	coda_vfs_stat.readlink++;
-
-        /* the maximum length we receive is len */
-        if ( length > CODA_MAXPATHLEN ) 
-	        len = CODA_MAXPATHLEN;
-	else
-	        len = length;
-	CODA_ALLOC(buf, char *, len);
-	if ( !buf ) 
-	        return -ENOMEM;
-	
-	error = venus_readlink(inode->i_sb, &(cp->c_fid), buf, &len);
-
-        CDEBUG(D_INODE, "result %s\n", buf);
-	if (! error) {
-		copy_to_user(buffer, buf, len);
-		put_user('\0', buffer + len);
-		error = len;
-	}
-	if ( buf )
-		CODA_FREE(buf, len);
-	return error;
-}
-
-static struct dentry *coda_follow_link(struct dentry *de, struct dentry *base,
-				       unsigned int follow)
-{
-	struct inode *inode = de->d_inode;
+	struct inode *inode = dentry->d_inode;
 	int error;
 	struct coda_inode_info *cnp;
-	unsigned int len;
-	char mem[CODA_MAXPATHLEN];
-	char *path;
-	ENTRY;
-	CDEBUG(D_INODE, "(%x/%ld)\n", inode->i_dev, inode->i_ino);
-	
+	unsigned int len = PAGE_SIZE;
+	char *p = (char*)kmap(page);
+
         cnp = ITOC(inode);
 	coda_vfs_stat.follow_link++;
 
-	len = CODA_MAXPATHLEN;
-	error = venus_readlink(inode->i_sb, &(cnp->c_fid), mem, &len);
-
-	if (error) {
-		dput(base);
-		return ERR_PTR(error);
-	}
-	len = strlen(mem);
-	path = kmalloc(len + 1, GFP_KERNEL);
-	if (!path) {
-		dput(base);
-		return ERR_PTR(-ENOMEM);
-	}
-	memcpy(path, mem, len);
-	path[len] = 0;
-
-	base = lookup_dentry(path, base, follow);
-	kfree(path);
-	return base;
+	error = venus_readlink(inode->i_sb, &(cnp->c_fid), p, &len);
+	if (error)
+		goto fail;
+	SetPageUptodate(page);
+	kunmap(page);
+	UnlockPage(page);
+	return 0;
+
+fail:
+	SetPageError(page);
+	kunmap(page);
+	UnlockPage(page);
+	return error;
 }
+
+struct inode_operations coda_symlink_inode_operations = {
+	readlink:	page_readlink,
+	follow_link:	page_follow_link,
+	readpage:	coda_symlink_filler
+};