1 files changed, 0 insertions, 386 deletions
diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c
deleted file mode 100644
index 6b61df117fd4..000000000000
--- a/fs/cifs/cifs_dfs_ref.c
+++ /dev/null
@@ -1,386 +0,0 @@
-/*
- *   Contains the CIFS DFS referral mounting routines used for handling
- *   traversal via DFS junction point
- *
- *   Copyright (c) 2007 Igor Mammedov
- *   Copyright (C) International Business Machines  Corp., 2008
- *   Author(s): Igor Mammedov (niallain@gmail.com)
- *		Steve French (sfrench@us.ibm.com)
- *   This program is free software; you can redistribute it and/or
- *   modify it under the terms of the GNU General Public License
- *   as published by the Free Software Foundation; either version
- *   2 of the License, or (at your option) any later version.
- */
-
-#include <linux/dcache.h>
-#include <linux/mount.h>
-#include <linux/namei.h>
-#include <linux/slab.h>
-#include <linux/vfs.h>
-#include <linux/fs.h>
-#include <linux/inet.h>
-#include "cifsglob.h"
-#include "cifsproto.h"
-#include "cifsfs.h"
-#include "dns_resolve.h"
-#include "cifs_debug.h"
-#include "cifs_unicode.h"
-
-static LIST_HEAD(cifs_dfs_automount_list);
-
-static void cifs_dfs_expire_automounts(struct work_struct *work);
-static DECLARE_DELAYED_WORK(cifs_dfs_automount_task,
-			    cifs_dfs_expire_automounts);
-static int cifs_dfs_mountpoint_expiry_timeout = 500 * HZ;
-
-static void cifs_dfs_expire_automounts(struct work_struct *work)
-{
-	struct list_head *list = &cifs_dfs_automount_list;
-
-	mark_mounts_for_expiry(list);
-	if (!list_empty(list))
-		schedule_delayed_work(&cifs_dfs_automount_task,
-				      cifs_dfs_mountpoint_expiry_timeout);
-}
-
-void cifs_dfs_release_automount_timer(void)
-{
-	BUG_ON(!list_empty(&cifs_dfs_automount_list));
-	cancel_delayed_work_sync(&cifs_dfs_automount_task);
-}
-
-/**
- * cifs_build_devname - build a devicename from a UNC and optional prepath
- * @nodename:	pointer to UNC string
- * @prepath:	pointer to prefixpath (or NULL if there isn't one)
- *
- * Build a new cifs devicename after chasing a DFS referral. Allocate a buffer
- * big enough to hold the final thing. Copy the UNC from the nodename, and
- * concatenate the prepath onto the end of it if there is one.
- *
- * Returns pointer to the built string, or a ERR_PTR. Caller is responsible
- * for freeing the returned string.
- */
-static char *
-cifs_build_devname(char *nodename, const char *prepath)
-{
-	size_t pplen;
-	size_t unclen;
-	char *dev;
-	char *pos;
-
-	/* skip over any preceding delimiters */
-	nodename += strspn(nodename, "\\");
-	if (!*nodename)
-		return ERR_PTR(-EINVAL);
-
-	/* get length of UNC and set pos to last char */
-	unclen = strlen(nodename);
-	pos = nodename + unclen - 1;
-
-	/* trim off any trailing delimiters */
-	while (*pos == '\\') {
-		--pos;
-		--unclen;
-	}
-
-	/* allocate a buffer:
-	 * +2 for preceding "//"
-	 * +1 for delimiter between UNC and prepath
-	 * +1 for trailing NULL
-	 */
-	pplen = prepath ? strlen(prepath) : 0;
-	dev = kmalloc(2 + unclen + 1 + pplen + 1, GFP_KERNEL);
-	if (!dev)
-		return ERR_PTR(-ENOMEM);
-
-	pos = dev;
-	/* add the initial "//" */
-	*pos = '/';
-	++pos;
-	*pos = '/';
-	++pos;
-
-	/* copy in the UNC portion from referral */
-	memcpy(pos, nodename, unclen);
-	pos += unclen;
-
-	/* copy the prefixpath remainder (if there is one) */
-	if (pplen) {
-		*pos = '/';
-		++pos;
-		memcpy(pos, prepath, pplen);
-		pos += pplen;
-	}
-
-	/* NULL terminator */
-	*pos = '\0';
-
-	convert_delimiter(dev, '/');
-	return dev;
-}
-
-
-/**
- * cifs_compose_mount_options	-	creates mount options for refferral
- * @sb_mountdata:	parent/root DFS mount options (template)
- * @fullpath:		full path in UNC format
- * @ref:		server's referral
- * @devname:		pointer for saving device name
- *
- * creates mount options for submount based on template options sb_mountdata
- * and replacing unc,ip,prefixpath options with ones we've got form ref_unc.
- *
- * Returns: pointer to new mount options or ERR_PTR.
- * Caller is responcible for freeing retunrned value if it is not error.
- */
-char *cifs_compose_mount_options(const char *sb_mountdata,
-				   const char *fullpath,
-				   const struct dfs_info3_param *ref,
-				   char **devname)
-{
-	int rc;
-	char *mountdata = NULL;
-	const char *prepath = NULL;
-	int md_len;
-	char *tkn_e;
-	char *srvIP = NULL;
-	char sep = ',';
-	int off, noff;
-
-	if (sb_mountdata == NULL)
-		return ERR_PTR(-EINVAL);
-
-	if (strlen(fullpath) - ref->path_consumed) {
-		prepath = fullpath + ref->path_consumed;
-		/* skip initial delimiter */
-		if (*prepath == '/' || *prepath == '\\')
-			prepath++;
-	}
-
-	*devname = cifs_build_devname(ref->node_name, prepath);
-	if (IS_ERR(*devname)) {
-		rc = PTR_ERR(*devname);
-		*devname = NULL;
-		goto compose_mount_options_err;
-	}
-
-	rc = dns_resolve_server_name_to_ip(*devname, &srvIP);
-	if (rc < 0) {
-		cifs_dbg(FYI, "%s: Failed to resolve server part of %s to IP: %d\n",
-			 __func__, *devname, rc);
-		goto compose_mount_options_err;
-	}
-
-	/*
-	 * In most cases, we'll be building a shorter string than the original,
-	 * but we do have to assume that the address in the ip= option may be
-	 * much longer than the original. Add the max length of an address
-	 * string to the length of the original string to allow for worst case.
-	 */
-	md_len = strlen(sb_mountdata) + INET6_ADDRSTRLEN;
-	mountdata = kzalloc(md_len + sizeof("ip=") + 1, GFP_KERNEL);
-	if (mountdata == NULL) {
-		rc = -ENOMEM;
-		goto compose_mount_options_err;
-	}
-
-	/* copy all options except of unc,ip,prefixpath */
-	off = 0;
-	if (strncmp(sb_mountdata, "sep=", 4) == 0) {
-			sep = sb_mountdata[4];
-			strncpy(mountdata, sb_mountdata, 5);
-			off += 5;
-	}
-
-	do {
-		tkn_e = strchr(sb_mountdata + off, sep);
-		if (tkn_e == NULL)
-			noff = strlen(sb_mountdata + off);
-		else
-			noff = tkn_e - (sb_mountdata + off) + 1;
-
-		if (strncasecmp(sb_mountdata + off, "unc=", 4) == 0) {
-			off += noff;
-			continue;
-		}
-		if (strncasecmp(sb_mountdata + off, "ip=", 3) == 0) {
-			off += noff;
-			continue;
-		}
-		if (strncasecmp(sb_mountdata + off, "prefixpath=", 11) == 0) {
-			off += noff;
-			continue;
-		}
-		strncat(mountdata, sb_mountdata + off, noff);
-		off += noff;
-	} while (tkn_e);
-	strcat(mountdata, sb_mountdata + off);
-	mountdata[md_len] = '\0';
-
-	/* copy new IP and ref share name */
-	if (mountdata[strlen(mountdata) - 1] != sep)
-		strncat(mountdata, &sep, 1);
-	strcat(mountdata, "ip=");
-	strcat(mountdata, srvIP);
-
-	/*cifs_dbg(FYI, "%s: parent mountdata: %s\n", __func__, sb_mountdata);*/
-	/*cifs_dbg(FYI, "%s: submount mountdata: %s\n", __func__, mountdata );*/
-
-compose_mount_options_out:
-	kfree(srvIP);
-	return mountdata;
-
-compose_mount_options_err:
-	kfree(mountdata);
-	mountdata = ERR_PTR(rc);
-	kfree(*devname);
-	*devname = NULL;
-	goto compose_mount_options_out;
-}
-
-/**
- * cifs_dfs_do_refmount - mounts specified path using provided refferal
- * @cifs_sb:		parent/root superblock
- * @fullpath:		full path in UNC format
- * @ref:		server's referral
- */
-static struct vfsmount *cifs_dfs_do_refmount(struct dentry *mntpt,
-		struct cifs_sb_info *cifs_sb,
-		const char *fullpath, const struct dfs_info3_param *ref)
-{
-	struct vfsmount *mnt;
-	char *mountdata;
-	char *devname = NULL;
-
-	/* strip first '\' from fullpath */
-	mountdata = cifs_compose_mount_options(cifs_sb->mountdata,
-			fullpath + 1, ref, &devname);
-
-	if (IS_ERR(mountdata))
-		return (struct vfsmount *)mountdata;
-
-	mnt = vfs_submount(mntpt, &cifs_fs_type, devname, mountdata);
-	kfree(mountdata);
-	kfree(devname);
-	return mnt;
-
-}
-
-static void dump_referral(const struct dfs_info3_param *ref)
-{
-	cifs_dbg(FYI, "DFS: ref path: %s\n", ref->path_name);
-	cifs_dbg(FYI, "DFS: node path: %s\n", ref->node_name);
-	cifs_dbg(FYI, "DFS: fl: %hd, srv_type: %hd\n",
-		 ref->flags, ref->server_type);
-	cifs_dbg(FYI, "DFS: ref_flags: %hd, path_consumed: %hd\n",
-		 ref->ref_flag, ref->path_consumed);
-}
-
-/*
- * Create a vfsmount that we can automount
- */
-static struct vfsmount *cifs_dfs_do_automount(struct dentry *mntpt)
-{
-	struct dfs_info3_param *referrals = NULL;
-	unsigned int num_referrals = 0;
-	struct cifs_sb_info *cifs_sb;
-	struct cifs_ses *ses;
-	char *full_path;
-	unsigned int xid;
-	int i;
-	int rc;
-	struct vfsmount *mnt;
-	struct tcon_link *tlink;
-
-	cifs_dbg(FYI, "in %s\n", __func__);
-	BUG_ON(IS_ROOT(mntpt));
-
-	/*
-	 * The MSDFS spec states that paths in DFS referral requests and
-	 * responses must be prefixed by a single '\' character instead of
-	 * the double backslashes usually used in the UNC. This function
-	 * gives us the latter, so we must adjust the result.
-	 */
-	mnt = ERR_PTR(-ENOMEM);
-
-	/* always use tree name prefix */
-	full_path = build_path_from_dentry_optional_prefix(mntpt, true);
-	if (full_path == NULL)
-		goto cdda_exit;
-
-	cifs_sb = CIFS_SB(mntpt->d_sb);
-	tlink = cifs_sb_tlink(cifs_sb);
-	if (IS_ERR(tlink)) {
-		mnt = ERR_CAST(tlink);
-		goto free_full_path;
-	}
-	ses = tlink_tcon(tlink)->ses;
-
-	xid = get_xid();
-	rc = get_dfs_path(xid, ses, full_path + 1, cifs_sb->local_nls,
-		&num_referrals, &referrals,
-		cifs_remap(cifs_sb));
-	free_xid(xid);
-
-	cifs_put_tlink(tlink);
-
-	mnt = ERR_PTR(-ENOENT);
-	for (i = 0; i < num_referrals; i++) {
-		int len;
-		dump_referral(referrals + i);
-		/* connect to a node */
-		len = strlen(referrals[i].node_name);
-		if (len < 2) {
-			cifs_dbg(VFS, "%s: Net Address path too short: %s\n",
-				 __func__, referrals[i].node_name);
-			mnt = ERR_PTR(-EINVAL);
-			break;
-		}
-		mnt = cifs_dfs_do_refmount(mntpt, cifs_sb,
-				full_path, referrals + i);
-		cifs_dbg(FYI, "%s: cifs_dfs_do_refmount:%s , mnt:%p\n",
-			 __func__, referrals[i].node_name, mnt);
-		if (!IS_ERR(mnt))
-			goto success;
-	}
-
-	/* no valid submounts were found; return error from get_dfs_path() by
-	 * preference */
-	if (rc != 0)
-		mnt = ERR_PTR(rc);
-
-success:
-	free_dfs_info_array(referrals, num_referrals);
-free_full_path:
-	kfree(full_path);
-cdda_exit:
-	cifs_dbg(FYI, "leaving %s\n" , __func__);
-	return mnt;
-}
-
-/*
- * Attempt to automount the referral
- */
-struct vfsmount *cifs_dfs_d_automount(struct path *path)
-{
-	struct vfsmount *newmnt;
-
-	cifs_dbg(FYI, "in %s\n", __func__);
-
-	newmnt = cifs_dfs_do_automount(path->dentry);
-	if (IS_ERR(newmnt)) {
-		cifs_dbg(FYI, "leaving %s [automount failed]\n" , __func__);
-		return newmnt;
-	}
-
-	mntget(newmnt); /* prevent immediate expiration */
-	mnt_set_expiry(newmnt, &cifs_dfs_automount_list);
-	schedule_delayed_work(&cifs_dfs_automount_task,
-			      cifs_dfs_mountpoint_expiry_timeout);
-	cifs_dbg(FYI, "leaving %s [ok]\n" , __func__);
-	return newmnt;
-}
-
-const struct inode_operations cifs_dfs_referral_inode_operations = {
-};