[CIFS] DFS build fixes

Also includes a few minor changes suggested by Christoph
Signed-off-by: NSteve French <sfrench@us.ibm.com>

fs/cifs/cifs_dfs_ref.c

@@ -3,8 +3,9 @@
  *   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
@@ -107,7 +108,8 @@ static char *cifs_get_share_name(const char *node_name)
  * Returns: pointer to new mount options or ERR_PTR.
  * Caller is responcible for freeing retunrned value if it is not error.
  */
-char *compose_mount_options(const char *sb_mountdata, const char *ref_unc,
+static char *compose_mount_options(const char *sb_mountdata,
+				   const char *ref_unc,
 				   char **devname)
 {
 	int rc;
@@ -188,13 +190,13 @@ char *compose_mount_options(const char *sb_mountdata, const char *ref_unc,
 }
 
 
-struct vfsmount *cifs_dfs_do_refmount(const struct vfsmount *mnt_parent,
+static struct vfsmount *cifs_dfs_do_refmount(const struct vfsmount *mnt_parent,
 		struct dentry *dentry, char *ref_unc)
 {
 	struct cifs_sb_info *cifs_sb;
 	struct vfsmount *mnt;
 	char *mountdata;
-	char *devname;
+	char *devname = NULL;
 
 	cifs_sb = CIFS_SB(dentry->d_inode->i_sb);
 	mountdata = compose_mount_options(cifs_sb->mountdata,
@@ -278,7 +280,7 @@ static int add_mount_helper(struct vfsmount *newmnt, struct nameidata *nd,
 	return err;
 }
 
-void dump_referral(const struct dfs_info3_param *ref)
+static void dump_referral(const struct dfs_info3_param *ref)
 {
 	cFYI(1, ("DFS: ref path: %s", ref->path_name));
 	cFYI(1, ("DFS: node path: %s", ref->node_name));

fs/cifs/cifsglob.h

 /*
  *   fs/cifs/cifsglob.h
  *
- *   Copyright (C) International Business Machines  Corp., 2002,2007
+ *   Copyright (C) International Business Machines  Corp., 2002,2008
  *   Author(s): Steve French (sfrench@us.ibm.com)
  *              Jeremy Allison (jra@samba.org)
  *
@@ -69,14 +69,6 @@
 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
 #endif
 
-/*
- * This information is kept on every Server we know about.
- *
- * Some things to note:
- *
- */
-#define SERVER_NAME_LEN_WITH_NULL	(SERVER_NAME_LENGTH + 1)
-
 /*
  * CIFS vfs client Status information (based on what we know.)
  */
@@ -460,6 +452,37 @@ struct dir_notify_req {
        struct file *pfile;
 };
 
+struct dfs_info3_param {
+	int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
+	int PathConsumed;
+	int server_type;
+	int ref_flag;
+	char *path_name;
+	char *node_name;
+};
+
+static inline void free_dfs_info_param(struct dfs_info3_param *param)
+{
+	if (param) {
+		kfree(param->path_name);
+		kfree(param->node_name);
+		kfree(param);
+	}
+}
+
+static inline void free_dfs_info_array(struct dfs_info3_param *param,
+				       int number_of_items)
+{
+	int i;
+	if ((number_of_items == 0) || (param == NULL))
+		return;
+	for (i = 0; i < number_of_items; i++) {
+		kfree(param[i].path_name);
+		kfree(param[i].node_name);
+	}
+	kfree(param);
+}
+
 #define   MID_FREE 0
 #define   MID_REQUEST_ALLOCATED 1
 #define   MID_REQUEST_SUBMITTED 2

fs/cifs/cifsproto.h

 /*
  *   fs/cifs/cifsproto.h
  *
- *   Copyright (c) International Business Machines  Corp., 2002,2007
+ *   Copyright (c) International Business Machines  Corp., 2002,2008
  *   Author(s): Steve French (sfrench@us.ibm.com)
  *
  *   This library is free software; you can redistribute it and/or modify
@@ -156,7 +156,7 @@ extern int get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
 			const char *old_path,
 			const struct nls_table *nls_codepage,
 			unsigned int *pnum_referrals,
-			unsigned char **preferrals,
+			struct dfs_info3_param **preferrals,
 			int remap);
 extern void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
 				 struct super_block *sb, struct smb_vol *vol);

fs/cifs/connect.c

 /*
  *   fs/cifs/connect.c
  *
- *   Copyright (C) International Business Machines  Corp., 2002,2007
+ *   Copyright (C) International Business Machines  Corp., 2002,2008
  *   Author(s): Steve French (sfrench@us.ibm.com)
  *
  *   This library is free software; you can redistribute it and/or modify
@@ -1410,7 +1410,7 @@ connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
 		    const char *old_path, const struct nls_table *nls_codepage,
 		    int remap)
 {
-	unsigned char *referrals = NULL;
+	struct dfs_info3_param *referrals = NULL;
 	unsigned int num_referrals;
 	int rc = 0;
 
@@ -1429,12 +1429,14 @@ connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
 int
 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
 	     const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
-	     unsigned char **preferrals, int remap)
+	     struct dfs_info3_param **preferrals, int remap)
 {
 	char *temp_unc;
 	int rc = 0;
+	unsigned char *targetUNCs;
 
 	*pnum_referrals = 0;
+	*preferrals = NULL;
 
 	if (pSesInfo->ipc_tid == 0) {
 		temp_unc = kmalloc(2 /* for slashes */ +
@@ -1454,8 +1456,10 @@ get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
 		kfree(temp_unc);
 	}
 	if (rc == 0)
-		rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
+		rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, &targetUNCs,
 				     pnum_referrals, nls_codepage, remap);
+	/* BB map targetUNCs to dfs_info3 structures, here or
+		in CIFSGetDFSRefer BB */
 
 	return rc;
 }

fs/cifs/dns_resolve.c

@@ -64,13 +64,14 @@ struct key_type key_type_dns_resolver = {
  * return 0 on success
  */
 int
-dns_resolve_server_name_to_ip(const char *unc, char **ip_addr) {
+dns_resolve_server_name_to_ip(const char *unc, char **ip_addr)
+{
 	int rc = -EAGAIN;
 	struct key *rkey;
 	char *name;
 	int len;
 
-	if ((!ip_addr) || (!unc))
+	if (!ip_addr || !unc)
 		return -EINVAL;
 
 	/* search for server name delimiter */

fs/cifs/link.c

 /*
  *   fs/cifs/link.c
  *
- *   Copyright (C) International Business Machines  Corp., 2002,2003
+ *   Copyright (C) International Business Machines  Corp., 2002,2008
  *   Author(s): Steve French (sfrench@us.ibm.com)
  *
  *   This library is free software; you can redistribute it and/or modify
@@ -236,8 +236,6 @@ cifs_readlink(struct dentry *direntry, char __user *pBuffer, int buflen)
 	char *full_path = NULL;
 	char *tmp_path = NULL;
 	char *tmpbuffer;
-	unsigned char *referrals = NULL;
-	unsigned int num_referrals = 0;
 	int len;
 	__u16 fid;
 
@@ -297,8 +295,11 @@ cifs_readlink(struct dentry *direntry, char __user *pBuffer, int buflen)
 				cFYI(1, ("Error closing junction point "
 					 "(open for ioctl)"));
 			}
+			/* BB unwind this long, nested function, or remove BB */
 			if (rc == -EIO) {
 				/* Query if DFS Junction */
+				unsigned int num_referrals = 0;
+				struct dfs_info3_param *refs = NULL;
 				tmp_path =
 					kmalloc(MAX_TREE_SIZE + MAX_PATHCONF + 1,
 						GFP_KERNEL);
@@ -310,7 +311,7 @@ cifs_readlink(struct dentry *direntry, char __user *pBuffer, int buflen)
 					rc = get_dfs_path(xid, pTcon->ses,
 						tmp_path,
 						cifs_sb->local_nls,
-						&num_referrals, &referrals,
+						&num_referrals, &refs,
 						cifs_sb->mnt_cifs_flags &
 						    CIFS_MOUNT_MAP_SPECIAL_CHR);
 					cFYI(1, ("Get DFS for %s rc = %d ",
@@ -320,14 +321,13 @@ cifs_readlink(struct dentry *direntry, char __user *pBuffer, int buflen)
 					else {
 						cFYI(1, ("num referral: %d",
 							num_referrals));
-						if (referrals) {
-							cFYI(1,("referral string: %s", referrals));
+						if (refs && refs->path_name) {
 							strncpy(tmpbuffer,
-								referrals,
+								refs->path_name,
 								len-1);
 						}
 					}
-					kfree(referrals);
+					kfree(refs);
 					kfree(tmp_path);
 }
 				/* BB add code like else decode referrals