Fix VFS layer:

1. Finally work with cascaded modules with private data storage per module
2. Convert VFS API to macro calls to simplify cascading
3. Add quota support to VFS layer (prepare to NT quota support)

Patch by Stefan (metze) Metzemacher, with review of Jelmer and me
Tested in past few weeks. Documentation to new VFS API for third-party developers to follow
(This used to be commit 91984ef5caa2d13c5d52e1f535bd3bbbae1ec978)

1 files changed, 96 insertions, 105 deletions

diff --git a/source3/torture/cmd_vfs.c b/source3/torture/cmd_vfs.c
index b90c53e9fe..ee71b83471 100644
--- a/source3/torture/cmd_vfs.c
+++ b/source3/torture/cmd_vfs.c
@@ -23,37 +23,28 @@
 #include "includes.h"
 #include "vfstest.h"
 
-static char *null_string = "";
+static const char *null_string = "";
 
-static NTSTATUS cmd_load_module(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_load_module(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
-	struct smb_vfs_handle_struct *handle;
-	char *path = lp_vfs_path(0);
-	char name[PATH_MAX];
+	int i;
 	
-	if (argc != 2) {
-		printf("Usage: load <module path>\n");
+	if (argc < 2) {
+		printf("Usage: load <modules>\n");
 		return NT_STATUS_OK;
 	}
 
-	if (path != NULL && *path != '\0') {
-		snprintf(name, PATH_MAX, "%s/%s", path, argv[1]);
-	} else {
-		snprintf(name, PATH_MAX, "%s", argv[1]);
-	}
-	vfs->conn->vfs_private = NULL;
-	handle = (struct smb_vfs_handle_struct *) smb_xmalloc(sizeof(smb_vfs_handle_struct));
-	handle->handle = NULL;
-	DLIST_ADD(vfs->conn->vfs_private, handle)
-	if (!vfs_init_custom(vfs->conn, name)) {
-		DEBUG(0, ("load: error=-1 (vfs_init_custom failed for %s)\n", argv[1]));
-		return NT_STATUS_UNSUCCESSFUL;
+	for (i=argc-1;i>0;i--) {
+		if (!vfs_init_custom(vfs->conn, argv[i])) {
+			DEBUG(0, ("load: (vfs_init_custom failed for %s)\n", argv[i]));
+			return NT_STATUS_UNSUCCESSFUL;
+		}
 	}
 	printf("load: ok\n");
 	return NT_STATUS_OK;
 }
 
-static NTSTATUS cmd_populate(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_populate(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	char c;
 	size_t size;
@@ -73,7 +64,7 @@ static NTSTATUS cmd_populate(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int arg
 	return NT_STATUS_OK;
 }
 
-static NTSTATUS cmd_show_data(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_show_data(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	size_t offset;
 	size_t len;
@@ -101,19 +92,19 @@ static NTSTATUS cmd_show_data(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int ar
 	return NT_STATUS_OK;
 }
 
-static NTSTATUS cmd_connect(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_connect(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
-	vfs->conn->vfs_ops.connect(vfs->conn, lp_servicename(vfs->conn->service), "vfstest");
+	VFS_CONNECT(vfs->conn, lp_servicename(vfs->conn->service), "vfstest");
 	return NT_STATUS_OK;
 }
 
-static NTSTATUS cmd_disconnect(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_disconnect(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
-	vfs->conn->vfs_ops.disconnect(vfs->conn);
+	VFS_DISCONNECT(vfs->conn);
 	return NT_STATUS_OK;
 }
 
-static NTSTATUS cmd_disk_free(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_disk_free(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	SMB_BIG_UINT diskfree, bsize, dfree, dsize;
 	if (argc != 2) {
@@ -121,7 +112,7 @@ static NTSTATUS cmd_disk_free(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int ar
 		return NT_STATUS_OK;
 	}
 
-	diskfree = vfs->conn->vfs_ops.disk_free(vfs->conn, argv[1], False, &bsize, &dfree, &dsize);
+	diskfree = VFS_DISK_FREE(vfs->conn, argv[1], False, &bsize, &dfree, &dsize);
 	printf("disk_free: %lu, bsize = %lu, dfree = %lu, dsize = %lu\n",
 			(unsigned long)diskfree,
 			(unsigned long)bsize,
@@ -131,14 +122,14 @@ static NTSTATUS cmd_disk_free(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int ar
 }
 
 
-static NTSTATUS cmd_opendir(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_opendir(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	if (argc != 2) {
 		printf("Usage: opendir <fname>\n");
 		return NT_STATUS_OK;
 	}
 
-	vfs->currentdir = vfs->conn->vfs_ops.opendir(vfs->conn, argv[1]);
+	vfs->currentdir = VFS_OPENDIR(vfs->conn, argv[1]);
 	if (vfs->currentdir == NULL) {
 		printf("opendir error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
@@ -149,7 +140,7 @@ static NTSTATUS cmd_opendir(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc
 }
 
 
-static NTSTATUS cmd_readdir(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_readdir(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	struct dirent *dent;
 
@@ -158,7 +149,7 @@ static NTSTATUS cmd_readdir(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc
 		return NT_STATUS_UNSUCCESSFUL;
 	}
 
-	dent = vfs->conn->vfs_ops.readdir(vfs->conn, vfs->currentdir);
+	dent = VFS_READDIR(vfs->conn, vfs->currentdir);
 	if (dent == NULL) {
 		printf("readdir: NULL\n");
 		return NT_STATUS_OK;
@@ -169,14 +160,14 @@ static NTSTATUS cmd_readdir(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc
 }
 
 
-static NTSTATUS cmd_mkdir(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_mkdir(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	if (argc != 2) {
 		printf("Usage: mkdir <path>\n");
 		return NT_STATUS_OK;
 	}
 
-	if (vfs->conn->vfs_ops.mkdir(vfs->conn, argv[1], 00755) == -1) {
+	if (VFS_MKDIR(vfs->conn, argv[1], 00755) == -1) {
 		printf("mkdir error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
@@ -186,7 +177,7 @@ static NTSTATUS cmd_mkdir(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 }
 
 
-static NTSTATUS cmd_closedir(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_closedir(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	int ret;
 	
@@ -195,7 +186,7 @@ static NTSTATUS cmd_closedir(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int arg
 		return NT_STATUS_UNSUCCESSFUL;
 	}
 
-	ret = vfs->conn->vfs_ops.closedir(vfs->conn, vfs->currentdir);
+	ret = VFS_CLOSEDIR(vfs->conn, vfs->currentdir);
 	if (ret == -1) {
 		printf("closedir failure: %s\n", strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
@@ -207,11 +198,11 @@ static NTSTATUS cmd_closedir(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int arg
 }
 
 
-static NTSTATUS cmd_open(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_open(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	int flags, fd;
 	mode_t mode;
-	char *flagstr;
+	const char *flagstr;
 
 	mode = 00400;
 
@@ -287,7 +278,7 @@ static NTSTATUS cmd_open(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, c
 		}
 	}
 
-	fd = vfs->conn->vfs_ops.open(vfs->conn, argv[1], flags, mode);
+	fd = VFS_OPEN(vfs->conn, argv[1], flags, mode);
 	if (fd == -1) {
 		printf("open: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
@@ -302,7 +293,7 @@ static NTSTATUS cmd_open(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, c
 }
 
 
-static NTSTATUS cmd_pathfunc(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_pathfunc(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	int ret = -1;
 
@@ -312,11 +303,11 @@ static NTSTATUS cmd_pathfunc(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int arg
 	}
 
 	if (strcmp("rmdir", argv[0]) == 0 ) {
-		ret = vfs->conn->vfs_ops.rmdir(vfs->conn, argv[1]);
+		ret = VFS_RMDIR(vfs->conn, argv[1]);
 	} else if (strcmp("unlink", argv[0]) == 0 ) {
-		ret = vfs->conn->vfs_ops.unlink(vfs->conn, argv[1]);
+		ret = VFS_UNLINK(vfs->conn, argv[1]);
 	} else if (strcmp("chdir", argv[0]) == 0 ) {
-		ret = vfs->conn->vfs_ops.chdir(vfs->conn, argv[1]);
+		ret = VFS_CHDIR(vfs->conn, argv[1]);
 	} else {
 		printf("%s: error=%d (invalid function name!)\n", argv[0], errno);
 		return NT_STATUS_UNSUCCESSFUL;
@@ -332,7 +323,7 @@ static NTSTATUS cmd_pathfunc(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int arg
 }
 
 
-static NTSTATUS cmd_close(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_close(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	int fd, ret;
 
@@ -347,7 +338,7 @@ static NTSTATUS cmd_close(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 		return NT_STATUS_OK;
 	}
 
-	ret = vfs->conn->vfs_ops.close(vfs->files[fd], fd);
+	ret = VFS_CLOSE(vfs->files[fd], fd);
 	if (ret == -1 )
 		printf("close: error=%d (%s)\n", errno, strerror(errno));
 	else
@@ -360,7 +351,7 @@ static NTSTATUS cmd_close(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 }
 
 
-static NTSTATUS cmd_read(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_read(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	int fd;
 	size_t size, rsize;
@@ -380,7 +371,7 @@ static NTSTATUS cmd_read(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, c
 	}
 	vfs->data_size = size;
 	
-	rsize = vfs->conn->vfs_ops.read(vfs->files[fd], fd, vfs->data, size);
+	rsize = VFS_READ(vfs->files[fd], fd, vfs->data, size);
 	if (rsize == -1) {
 		printf("read: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
@@ -391,7 +382,7 @@ static NTSTATUS cmd_read(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, c
 }
 
 
-static NTSTATUS cmd_write(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_write(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	int fd, size, wsize;
 
@@ -413,7 +404,7 @@ static NTSTATUS cmd_write(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 		return NT_STATUS_UNSUCCESSFUL;
 	}
 
-	wsize = vfs->conn->vfs_ops.write(vfs->files[fd], fd, vfs->data, size);
+	wsize = VFS_WRITE(vfs->files[fd], fd, vfs->data, size);
 
 	if (wsize == -1) {
 		printf("write: error=%d (%s)\n", errno, strerror(errno));
@@ -425,7 +416,7 @@ static NTSTATUS cmd_write(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 }
 
 
-static NTSTATUS cmd_lseek(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_lseek(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	int fd, offset, whence;
 	SMB_OFF_T pos;
@@ -444,7 +435,7 @@ static NTSTATUS cmd_lseek(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 		default:	whence = SEEK_END;
 	}
 
-	pos = vfs->conn->vfs_ops.lseek(vfs->files[fd], fd, offset, whence);
+	pos = VFS_LSEEK(vfs->files[fd], fd, offset, whence);
 	if (pos == (SMB_OFF_T)-1) {
 		printf("lseek: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
@@ -455,7 +446,7 @@ static NTSTATUS cmd_lseek(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 }
 
 
-static NTSTATUS cmd_rename(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_rename(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	int ret;
 	if (argc != 3) {
@@ -463,7 +454,7 @@ static NTSTATUS cmd_rename(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 		return NT_STATUS_OK;
 	}
 
-	ret = vfs->conn->vfs_ops.rename(vfs->conn, argv[1], argv[2]);
+	ret = VFS_RENAME(vfs->conn, argv[1], argv[2]);
 	if (ret == -1) {
 		printf("rename: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
@@ -474,7 +465,7 @@ static NTSTATUS cmd_rename(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 }
 
 
-static NTSTATUS cmd_fsync(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_fsync(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	int ret, fd;
 	if (argc != 2) {
@@ -483,7 +474,7 @@ static NTSTATUS cmd_fsync(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 	}
 
 	fd = atoi(argv[1]);
-	ret = vfs->conn->vfs_ops.fsync(vfs->files[fd], fd);
+	ret = VFS_FSYNC(vfs->files[fd], fd);
 	if (ret == -1) {
 		printf("fsync: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
@@ -494,11 +485,11 @@ static NTSTATUS cmd_fsync(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 }
 
 
-static NTSTATUS cmd_stat(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_stat(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	int ret;
-	char *user;
-	char *group;
+	const char *user;
+	const char *group;
 	struct passwd *pwd;
 	struct group *grp;
 	SMB_STRUCT_STAT st;
@@ -508,17 +499,17 @@ static NTSTATUS cmd_stat(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, c
 		return NT_STATUS_OK;
 	}
 
-	ret = vfs->conn->vfs_ops.stat(vfs->conn, argv[1], &st);
+	ret = VFS_STAT(vfs->conn, argv[1], &st);
 	if (ret == -1) {
 		printf("stat: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
 
 	pwd = sys_getpwuid(st.st_uid);
-	if (pwd != NULL) user = strdup(pwd->pw_name);
+	if (pwd != NULL) user = pwd->pw_name;
 	else user = null_string;
 	grp = sys_getgrgid(st.st_gid);
-	if (grp != NULL) group = strdup(grp->gr_name);
+	if (grp != NULL) group = grp->gr_name;
 	else group = null_string;
 
 	printf("stat: ok\n");
@@ -541,17 +532,17 @@ static NTSTATUS cmd_stat(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, c
 	printf("  Access: %s", ctime(&(st.st_atime)));
 	printf("  Modify: %s", ctime(&(st.st_mtime)));
 	printf("  Change: %s", ctime(&(st.st_ctime)));
-	if (user != null_string) SAFE_FREE(user);
-	if (group!= null_string) SAFE_FREE(group);
+	SAFE_FREE(pwd);
+	SAFE_FREE(grp);
 	return NT_STATUS_OK;
 }
 
 
-static NTSTATUS cmd_fstat(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_fstat(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	int fd;
-	char *user;
-	char *group;
+	const char *user;
+	const char *group;
 	struct passwd *pwd;
 	struct group *grp;
 	SMB_STRUCT_STAT st;
@@ -572,16 +563,16 @@ static NTSTATUS cmd_fstat(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 		return NT_STATUS_OK;
 	}
 
-	if (vfs->conn->vfs_ops.fstat(vfs->files[fd], fd, &st) == -1) {
+	if (VFS_FSTAT(vfs->files[fd], fd, &st) == -1) {
 		printf("fstat: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
 
 	pwd = sys_getpwuid(st.st_uid);
-	if (pwd != NULL) user = strdup(pwd->pw_name);
+	if (pwd != NULL) user = pwd->pw_name;
 	else user = null_string;
 	grp = sys_getgrgid(st.st_gid);
-	if (grp != NULL) group = strdup(grp->gr_name);
+	if (grp != NULL) group = grp->gr_name;
 	else group = null_string;
 
 	printf("fstat: ok\n");
@@ -603,16 +594,16 @@ static NTSTATUS cmd_fstat(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 	printf("  Access: %s", ctime(&(st.st_atime)));
 	printf("  Modify: %s", ctime(&(st.st_mtime)));
 	printf("  Change: %s", ctime(&(st.st_ctime)));
-	if (user != null_string) SAFE_FREE(user);
-	if (group!= null_string) SAFE_FREE(group);
+	SAFE_FREE(pwd);
+	SAFE_FREE(grp);
 	return NT_STATUS_OK;
 }
 
 
-static NTSTATUS cmd_lstat(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_lstat(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
-	char *user;
-	char *group;
+	const char *user;
+	const char *group;
 	struct passwd *pwd;
 	struct group *grp;
 	SMB_STRUCT_STAT st;
@@ -622,16 +613,16 @@ static NTSTATUS cmd_lstat(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 		return NT_STATUS_OK;
 	}
 
-	if (vfs->conn->vfs_ops.lstat(vfs->conn, argv[1], &st) == -1) {
+	if (VFS_LSTAT(vfs->conn, argv[1], &st) == -1) {
 		printf("lstat: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
 
 	pwd = sys_getpwuid(st.st_uid);
-	if (pwd != NULL) user = strdup(pwd->pw_name);
+	if (pwd != NULL) user = pwd->pw_name;
 	else user = null_string;
 	grp = sys_getgrgid(st.st_gid);
-	if (grp != NULL) group = strdup(grp->gr_name);
+	if (grp != NULL) group = grp->gr_name;
 	else group = null_string;
 
 	printf("lstat: ok\n");
@@ -653,13 +644,13 @@ static NTSTATUS cmd_lstat(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 	printf("  Access: %s", ctime(&(st.st_atime)));
 	printf("  Modify: %s", ctime(&(st.st_mtime)));
 	printf("  Change: %s", ctime(&(st.st_ctime)));
-	if (user != null_string) SAFE_FREE(user);
-	if (group!= null_string) SAFE_FREE(group);
+	SAFE_FREE(pwd);
+	SAFE_FREE(grp);
 	return NT_STATUS_OK;
 }
 
 
-static NTSTATUS cmd_chmod(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_chmod(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	mode_t mode;
 	if (argc != 3) {
@@ -668,7 +659,7 @@ static NTSTATUS cmd_chmod(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 	}
 
 	mode = atoi(argv[2]);
-	if (vfs->conn->vfs_ops.chmod(vfs->conn, argv[1], mode) == -1) {
+	if (VFS_CHMOD(vfs->conn, argv[1], mode) == -1) {
 		printf("chmod: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
@@ -678,7 +669,7 @@ static NTSTATUS cmd_chmod(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 }
 
 
-static NTSTATUS cmd_fchmod(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_fchmod(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	int fd;
 	mode_t mode;
@@ -698,7 +689,7 @@ static NTSTATUS cmd_fchmod(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 		return NT_STATUS_OK;
 	}
 
-	if (vfs->conn->vfs_ops.fchmod(vfs->files[fd], fd, mode) == -1) {
+	if (VFS_FCHMOD(vfs->files[fd], fd, mode) == -1) {
 		printf("fchmod: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
@@ -708,7 +699,7 @@ static NTSTATUS cmd_fchmod(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 }
 
 
-static NTSTATUS cmd_chown(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_chown(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	uid_t uid;
 	gid_t gid;
@@ -719,7 +710,7 @@ static NTSTATUS cmd_chown(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 
 	uid = atoi(argv[2]);
 	gid = atoi(argv[3]);
-	if (vfs->conn->vfs_ops.chown(vfs->conn, argv[1], uid, gid) == -1) {
+	if (VFS_CHOWN(vfs->conn, argv[1], uid, gid) == -1) {
 		printf("chown: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
@@ -729,7 +720,7 @@ static NTSTATUS cmd_chown(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 }
 
 
-static NTSTATUS cmd_fchown(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_fchown(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	uid_t uid;
 	gid_t gid;
@@ -750,7 +741,7 @@ static NTSTATUS cmd_fchown(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 		printf("fchown: error=%d (invalid file descriptor)\n", EBADF);
 		return NT_STATUS_OK;
 	}
-	if (vfs->conn->vfs_ops.fchown(vfs->files[fd], fd, uid, gid) == -1) {
+	if (VFS_FCHOWN(vfs->files[fd], fd, uid, gid) == -1) {
 		printf("fchown error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
@@ -760,10 +751,10 @@ static NTSTATUS cmd_fchown(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 }
 
 
-static NTSTATUS cmd_getwd(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_getwd(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	char buf[PATH_MAX];
-	if (vfs->conn->vfs_ops.getwd(vfs->conn, buf) == NULL) {
+	if (VFS_GETWD(vfs->conn, buf) == NULL) {
 		printf("getwd: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
@@ -772,7 +763,7 @@ static NTSTATUS cmd_getwd(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 	return NT_STATUS_OK;
 }
 
-static NTSTATUS cmd_utime(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_utime(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	struct utimbuf times;
 	if (argc != 4) {
@@ -781,7 +772,7 @@ static NTSTATUS cmd_utime(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 	}
 	times.actime = atoi(argv[2]);
 	times.modtime = atoi(argv[3]);
-	if (vfs->conn->vfs_ops.utime(vfs->conn, argv[1], &times) != 0) {
+	if (VFS_UTIME(vfs->conn, argv[1], &times) != 0) {
 		printf("utime: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
@@ -790,7 +781,7 @@ static NTSTATUS cmd_utime(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 	return NT_STATUS_OK;
 }
 
-static NTSTATUS cmd_ftruncate(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_ftruncate(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	int fd;
 	SMB_OFF_T off;
@@ -810,7 +801,7 @@ static NTSTATUS cmd_ftruncate(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int ar
 		return NT_STATUS_OK;
 	}
 
-	if (vfs->conn->vfs_ops.ftruncate(vfs->files[fd], fd, off) == -1) {
+	if (VFS_FTRUNCATE(vfs->files[fd], fd, off) == -1) {
 		printf("ftruncate: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
@@ -819,7 +810,7 @@ static NTSTATUS cmd_ftruncate(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int ar
 	return NT_STATUS_OK;
 }
 
-static NTSTATUS cmd_lock(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_lock(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	BOOL ret;
 	int fd;
@@ -827,7 +818,7 @@ static NTSTATUS cmd_lock(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, c
 	long offset;
 	long count;
 	int type;
-	char *typestr;
+	const char *typestr;
 	
 	if (argc != 6) {
 		printf("Usage: lock <fd> <op> <offset> <count> <type>\n");
@@ -893,7 +884,7 @@ static NTSTATUS cmd_lock(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, c
 
 	printf("lock: debug lock(fd=%d, op=%d, offset=%ld, count=%ld, type=%d))\n", fd, op, offset, count, type);
 
-	if ((ret = vfs->conn->vfs_ops.lock(vfs->files[fd], fd, op, offset, count, type)) == False) {
+	if ((ret = VFS_LOCK(vfs->files[fd], fd, op, offset, count, type)) == False) {
 		printf("lock: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
@@ -902,14 +893,14 @@ static NTSTATUS cmd_lock(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, c
 	return NT_STATUS_OK;
 }
 
-static NTSTATUS cmd_symlink(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_symlink(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	if (argc != 3) {
 		printf("Usage: symlink <path> <link>\n");
 		return NT_STATUS_OK;
 	}
 
-	if (vfs->conn->vfs_ops.symlink(vfs->conn, argv[1], argv[2]) == -1) {
+	if (VFS_SYMLINK(vfs->conn, argv[1], argv[2]) == -1) {
 		printf("symlink: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
@@ -919,7 +910,7 @@ static NTSTATUS cmd_symlink(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc
 }
 
 
-static NTSTATUS cmd_readlink(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_readlink(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	char buffer[PATH_MAX];
 	int size;
@@ -929,7 +920,7 @@ static NTSTATUS cmd_readlink(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int arg
 		return NT_STATUS_OK;
 	}
 
-	if ((size = vfs->conn->vfs_ops.readlink(vfs->conn, argv[1], buffer, PATH_MAX)) == -1) {
+	if ((size = VFS_READLINK(vfs->conn, argv[1], buffer, PATH_MAX)) == -1) {
 		printf("readlink: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
@@ -940,14 +931,14 @@ static NTSTATUS cmd_readlink(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int arg
 }
 
 
-static NTSTATUS cmd_link(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_link(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	if (argc != 3) {
 		printf("Usage: link <path> <link>\n");
 		return NT_STATUS_OK;
 	}
 
-	if (vfs->conn->vfs_ops.link(vfs->conn, argv[1], argv[2]) == -1) {
+	if (VFS_LINK(vfs->conn, argv[1], argv[2]) == -1) {
 		printf("link: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
@@ -956,7 +947,7 @@ static NTSTATUS cmd_link(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, c
 	return NT_STATUS_OK;
 }
 
-static NTSTATUS cmd_mknod(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_mknod(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	mode_t mode;
 	unsigned int dev_val;
@@ -980,7 +971,7 @@ static NTSTATUS cmd_mknod(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 	}
 	dev = (SMB_DEV_T)dev_val;
 
-	if (vfs->conn->vfs_ops.mknod(vfs->conn, argv[1], mode, dev) == -1) {
+	if (VFS_MKNOD(vfs->conn, argv[1], mode, dev) == -1) {
 		printf("mknod: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}
@@ -989,7 +980,7 @@ static NTSTATUS cmd_mknod(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc,
 	return NT_STATUS_OK;
 }
 
-static NTSTATUS cmd_realpath(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, char **argv)
+static NTSTATUS cmd_realpath(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int argc, const char **argv)
 {
 	char respath[PATH_MAX];
 	
@@ -998,7 +989,7 @@ static NTSTATUS cmd_realpath(struct vfs_state *vfs, TALLOC_CTX *mem_ctx, int arg
 		return NT_STATUS_OK;
 	}
 
-	if (vfs->conn->vfs_ops.realpath(vfs->conn, argv[1], respath) == NULL) {
+	if (VFS_REALPATH(vfs->conn, argv[1], respath) == NULL) {
 		printf("realpath: error=%d (%s)\n", errno, strerror(errno));
 		return NT_STATUS_UNSUCCESSFUL;
 	}