Remove the "exists" parameter from create_msdfs_link

Jeremy, setting "exists" to True in _dfs_Add prevented the initial creation of
a new symlink for me, because the SMB_VFS_UNLINK failed. This also exists in
3.2. I only check it into 3.3 as I would like you to look at it first.

Thanks,

Volker
(This used to be commit f58b098a4172949018e84c4d0c722d6eb9bba514)

3 files changed, 14 insertions, 17 deletions

diff --git a/source3/include/proto.h b/source3/include/proto.h
index 30642678eb5..1d30a9a186d 100644
--- a/source3/include/proto.h
+++ b/source3/include/proto.h
@@ -9774,8 +9774,7 @@ int setup_dfs_referral(connection_struct *orig_conn,
 bool create_junction(TALLOC_CTX *ctx,
 		const char *dfs_path,
 		struct junction_map *jucn);
-bool create_msdfs_link(const struct junction_map *jucn,
-		bool exists);
+bool create_msdfs_link(const struct junction_map *jucn);
 bool remove_msdfs_link(const struct junction_map *jucn);
 struct junction_map *enum_msdfs_links(TALLOC_CTX *ctx, size_t *p_num_jn);
 NTSTATUS resolve_dfspath(TALLOC_CTX *ctx,
diff --git a/source3/rpc_server/srv_dfs_nt.c b/source3/rpc_server/srv_dfs_nt.c
index 974523dded8..72b8236fb9e 100644
--- a/source3/rpc_server/srv_dfs_nt.c
+++ b/source3/rpc_server/srv_dfs_nt.c
@@ -44,7 +44,6 @@ WERROR _dfs_Add(pipes_struct *p, struct dfs_Add *r)
 	struct referral *old_referral_list = NULL;
 	bool self_ref = False;
 	int consumedcnt = 0;
-	bool exists = False;
 	char *altpath = NULL;
 	NTSTATUS status;
 	TALLOC_CTX *ctx = talloc_tos();
@@ -76,7 +75,6 @@ WERROR _dfs_Add(pipes_struct *p, struct dfs_Add *r)
 		return ntstatus_to_werror(status);
 	}
 
-	exists = True;
 	jn->referral_count += 1;
 	old_referral_list = jn->referral_list;
 
@@ -101,7 +99,7 @@ WERROR _dfs_Add(pipes_struct *p, struct dfs_Add *r)
 	jn->referral_list[jn->referral_count-1].ttl = REFERRAL_TTL;
 	jn->referral_list[jn->referral_count-1].alternate_path = altpath;
 
-	if(!create_msdfs_link(jn, exists)) {
+	if(!create_msdfs_link(jn)) {
 		vfs_ChDir(p->conn,p->conn->connectpath);
 		return WERR_DFS_CANT_CREATE_JUNCT;
 	}
@@ -184,7 +182,7 @@ WERROR _dfs_Remove(pipes_struct *p, struct dfs_Remove *r)
 				return WERR_DFS_NO_SUCH_VOL;
 			}
 		} else {
-			if(!create_msdfs_link(jn, True)) {
+			if(!create_msdfs_link(jn)) {
 				vfs_ChDir(p->conn,p->conn->connectpath);
 				return WERR_DFS_CANT_CREATE_JUNCT;
 			}
diff --git a/source3/smbd/msdfs.c b/source3/smbd/msdfs.c
index bc7cd81337e..062ab804cc9 100644
--- a/source3/smbd/msdfs.c
+++ b/source3/smbd/msdfs.c
@@ -1318,8 +1318,7 @@ static bool junction_to_local_path(const struct junction_map *jucn,
 	return True;
 }
 
-bool create_msdfs_link(const struct junction_map *jucn,
-		bool exists)
+bool create_msdfs_link(const struct junction_map *jucn)
 {
 	char *path = NULL;
 	char *msdfs_link = NULL;
@@ -1369,19 +1368,20 @@ bool create_msdfs_link(const struct junction_map *jucn,
 	DEBUG(5,("create_msdfs_link: Creating new msdfs link: %s -> %s\n",
 		path, msdfs_link));
 
-	if(exists) {
-		if(SMB_VFS_UNLINK(conn,path)!=0) {
+	if(SMB_VFS_SYMLINK(conn, msdfs_link, path) < 0) {
+		if (errno == EEXIST) {
+			if(SMB_VFS_UNLINK(conn,path)!=0) {
+				goto out;
+			}
+		}
+		if (SMB_VFS_SYMLINK(conn, msdfs_link, path) < 0) {
+			DEBUG(1,("create_msdfs_link: symlink failed "
+				 "%s -> %s\nError: %s\n",
+				 path, msdfs_link, strerror(errno)));
 			goto out;
 		}
 	}
 
-	if(SMB_VFS_SYMLINK(conn, msdfs_link, path) < 0) {
-		DEBUG(1,("create_msdfs_link: symlink failed "
-			"%s -> %s\nError: %s\n", 
-			path, msdfs_link, strerror(errno)));
-		goto out;
-	}
-
 	ret = True;
 
 out: