From b37684ffcec4ba0beada55d37bcaf4f5e79bcd58 Mon Sep 17 00:00:00 2001
From: Volker Lendecke <vl@samba.org>
Date: Wed, 10 Dec 2008 12:32:24 +0100
Subject: [PATCH] Make use of smbd_gpfs_get_realfilename_path in unix_convert

---
 source3/modules/gpfs.c     | 25 ++++++++++++++++
 source3/modules/vfs_gpfs.c | 61 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 86 insertions(+)

diff --git a/source3/modules/gpfs.c b/source3/modules/gpfs.c
index c4b2518e021..92aecb9fb69 100644
--- a/source3/modules/gpfs.c
+++ b/source3/modules/gpfs.c
@@ -31,6 +31,8 @@ static int (*gpfs_set_share_fn)(int fd, unsigned int allow, unsigned int deny);
 static int (*gpfs_set_lease_fn)(int fd, unsigned int leaseType);
 static int (*gpfs_getacl_fn)(char *pathname, int flags, void *acl);
 static int (*gpfs_putacl_fn)(char *pathname, int flags, void *acl);
+static int (*gpfs_get_realfilename_path_fn)(char *pathname, char *filenamep,
+					    int *buflen);
 
 
 bool set_gpfs_sharemode(files_struct *fsp, uint32 access_mask,
@@ -134,6 +136,17 @@ int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
 	return gpfs_putacl_fn(pathname, flags, acl);
 }
 
+int smbd_gpfs_get_realfilename_path(char *pathname, char *filenamep,
+				    int *buflen)
+{
+	if (gpfs_get_realfilename_path_fn == NULL) {
+		errno = ENOSYS;
+		return -1;
+	}
+
+	return gpfs_get_realfilename_path_fn(pathname, filenamep, buflen);
+}
+
 static bool init_gpfs_function_lib(void *plibhandle_pointer,
 				   const char *libname,
 				   void *pfn_pointer, const char *fn_name)
@@ -142,6 +155,9 @@ static bool init_gpfs_function_lib(void *plibhandle_pointer,
 	void **libhandle_pointer = (void **)plibhandle_pointer;
 	void **fn_pointer = (void **)pfn_pointer;
 
+	DEBUG(10, ("trying to load name %s from %s\n",
+		   fn_name, libname));
+
 	if (*libhandle_pointer == NULL) {
 		*libhandle_pointer = sys_dlopen(libname, RTLD_LAZY);
 		did_open_here = true;
@@ -187,6 +203,8 @@ void init_gpfs(void)
 	init_gpfs_function(&gpfs_set_lease_fn, "gpfs_set_lease");
 	init_gpfs_function(&gpfs_getacl_fn, "gpfs_getacl");
 	init_gpfs_function(&gpfs_putacl_fn, "gpfs_putacl");
+	init_gpfs_function(&gpfs_get_realfilename_path_fn,
+			   "gpfs_get_realfilename_path");
 
 	gpfs_share_modes = lp_parm_bool(-1, "gpfs", "sharemodes", True);
 	gpfs_leases      = lp_parm_bool(-1, "gpfs", "leases", True);
@@ -226,6 +244,13 @@ int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
 	return -1;
 }
 
+int smbd_gpfs_get_realfilename_path(char *pathname, char *fileamep,
+				    int *buflen)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
 void init_gpfs(void)
 {
 	return;
diff --git a/source3/modules/vfs_gpfs.c b/source3/modules/vfs_gpfs.c
index 5cadce9e1d7..780bd9b8a56 100644
--- a/source3/modules/vfs_gpfs.c
+++ b/source3/modules/vfs_gpfs.c
@@ -72,7 +72,64 @@ static int vfs_gpfs_setlease(vfs_handle_struct *handle, files_struct *fsp,
 	return ret;
 }
 
+static int vfs_gpfs_get_real_filename(struct vfs_handle_struct *handle,
+				      const char *path,
+				      const char *name,
+				      TALLOC_CTX *mem_ctx,
+				      char **found_name)
+{
+	int result;
+	char *full_path;
+	char real_pathname[PATH_MAX+1];
+	int buflen;
+
+	full_path = talloc_asprintf(talloc_tos(), "%s/%s", path, name);
+	if (full_path == NULL) {
+		errno = ENOMEM;
+		return -1;
+	}
+
+	buflen = sizeof(real_pathname) - 1;
+
+	result = smbd_gpfs_get_realfilename_path(full_path, real_pathname,
+						 &buflen);
+
+	TALLOC_FREE(full_path);
+
+	if (result == -1) {
+		DEBUG(10, ("smbd_gpfs_get_realfilename_path returned %s\n",
+			   strerror(errno)));
+		return -1;
+	}
+
+	/*
+	 * GPFS does not necessarily null-terminate the returned path
+	 * but instead returns the buffer length in buflen.
+	 */
 
+	if (buflen < sizeof(real_pathname)) {
+		real_pathname[buflen] = '\0';
+	} else {
+		real_pathname[sizeof(real_pathname)-1] = '\0';
+	}
+
+	DEBUG(10, ("smbd_gpfs_get_realfilename_path: %s/%s -> %s\n",
+		   path, name, real_pathname));
+
+	name = strrchr_m(real_pathname, '/');
+	if (name == NULL) {
+		errno = ENOENT;
+		return -1;
+	}
+
+	*found_name = talloc_strdup(mem_ctx, name+1);
+	if (*found_name == NULL) {
+		errno = ENOMEM;
+		return -1;
+	}
+
+	return 0;
+}
 
 static void gpfs_dumpacl(int level, struct gpfs_acl *gacl)
 {
@@ -822,6 +879,10 @@ static vfs_op_tuple gpfs_op_tuples[] = {
 	  SMB_VFS_OP_LINUX_SETLEASE,
 	  SMB_VFS_LAYER_OPAQUE },
 
+        { SMB_VFS_OP(vfs_gpfs_get_real_filename),
+	  SMB_VFS_OP_GET_REAL_FILENAME,
+	  SMB_VFS_LAYER_OPAQUE },
+
         { SMB_VFS_OP(gpfsacl_fget_nt_acl), 
 	  SMB_VFS_OP_FGET_NT_ACL,
 	  SMB_VFS_LAYER_TRANSPARENT },
-- 
2.34.1