/*
Unix SMB/CIFS implementation.
NTVFS base code
+
Copyright (C) Andrew Tridgell 2003
+ Copyright (C) Stefan (metze) Metzmacher 2004
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
*/
#include "includes.h"
-
+#include "dlinklist.h"
+#include "build.h"
+#include "ntvfs/ntvfs.h"
/* the list of currently registered NTVFS backends, note that there
* can be more than one backend with the same name, as long as they
* have different typesx */
-static struct {
- struct ntvfs_ops *ops;
+static struct ntvfs_backend {
+ const struct ntvfs_ops *ops;
} *backends = NULL;
static int num_backends;
The 'type' is used to specify whether this is for a disk, printer or IPC$ share
*/
-static NTSTATUS ntvfs_register(void *_ops)
+_PUBLIC_ NTSTATUS ntvfs_register(const void *_ops)
{
- struct ntvfs_ops *ops = _ops;
+ const struct ntvfs_ops *ops = _ops;
+ struct ntvfs_ops *new_ops;
if (ntvfs_backend_byname(ops->name, ops->type) != NULL) {
/* its already registered! */
- DEBUG(2,("NTVFS backend '%s' for type %d already registered\n",
+ DEBUG(0,("NTVFS backend '%s' for type %d already registered\n",
ops->name, (int)ops->type));
return NT_STATUS_OBJECT_NAME_COLLISION;
}
- backends = Realloc(backends, sizeof(backends[0]) * (num_backends+1));
+ backends = realloc_p(backends, struct ntvfs_backend, num_backends+1);
if (!backends) {
smb_panic("out of memory in ntvfs_register");
}
- backends[num_backends].ops = smb_xmemdup(ops, sizeof(*ops));
- backends[num_backends].ops->name = smb_xstrdup(ops->name);
+ new_ops = smb_xmemdup(ops, sizeof(*ops));
+ new_ops->name = smb_xstrdup(ops->name);
+
+ backends[num_backends].ops = new_ops;
num_backends++;
+ DEBUG(3,("NTVFS backend '%s' for type %d registered\n",
+ ops->name,ops->type));
+
return NT_STATUS_OK;
}
/*
return the operations structure for a named backend of the specified type
*/
-struct ntvfs_ops *ntvfs_backend_byname(const char *name, enum ntvfs_type type)
+_PUBLIC_ const struct ntvfs_ops *ntvfs_backend_byname(const char *name, enum ntvfs_type type)
{
int i;
This can be used by backends to either detect compilation errors, or provide
multiple implementations for different smbd compilation options in one module
*/
-int ntvfs_interface_version(struct ntvfs_critical_sizes *sizes)
-{
- sizes->sizeof_ntvfs_ops = sizeof(struct ntvfs_ops);
- sizes->sizeof_SMB_OFF_T = sizeof(SMB_OFF_T);
- sizes->sizeof_tcon_context = sizeof(struct tcon_context);
- sizes->sizeof_request_context = sizeof(struct request_context);
- return NTVFS_INTERFACE_VERSION;
-}
+static const NTVFS_CURRENT_CRITICAL_SIZES(critical_sizes);
+_PUBLIC_ const struct ntvfs_critical_sizes *ntvfs_interface_version(void)
+{
+ return &critical_sizes;
+}
-/*
- initialise the NTVFS subsystem
-*/
-BOOL ntvfs_init(void)
+_PUBLIC_ BOOL ntvfs_interface_differs(const struct ntvfs_critical_sizes *const iface)
{
- register_subsystem("ntvfs", ntvfs_register);
+ /* The comparison would be easier with memcmp, but compiler-interset
+ * alignment padding is not guaranteed to be zeroed.
+ */
+
+#define FIELD_DIFFERS(field) (iface->field != critical_sizes.field)
+
+ if (FIELD_DIFFERS(interface_version))
+ return True;
+
+ if (FIELD_DIFFERS(sizeof_ntvfs_critical_sizes))
+ return True;
+
+ if (FIELD_DIFFERS(sizeof_ntvfs_context))
+ return True;
+
+ if (FIELD_DIFFERS(sizeof_ntvfs_module_context))
+ return True;
+
+ if (FIELD_DIFFERS(sizeof_ntvfs_ops))
+ return True;
- /* FIXME: Perhaps panic if a basic backend, such as IPC, fails to initialise? */
- static_init_ntvfs;
+ if (FIELD_DIFFERS(sizeof_ntvfs_async_state))
+ return True;
- DEBUG(3,("NTVFS version %d initialised\n", NTVFS_INTERFACE_VERSION));
- return True;
+ if (FIELD_DIFFERS(sizeof_ntvfs_request))
+ return True;
+
+ /* Versions match. */
+ return False;
+
+#undef FIELD_DIFFERS
}
/*
initialise a connection structure to point at a NTVFS backend
*/
-NTSTATUS ntvfs_init_connection(struct request_context *req)
+NTSTATUS ntvfs_init_connection(TALLOC_CTX *mem_ctx, int snum, enum ntvfs_type type,
+ enum protocol_types protocol,
+ struct event_context *ev, struct messaging_context *msg,
+ uint32_t server_id, struct ntvfs_context **_ctx)
{
- const char *handler = lp_ntvfs_handler(req->conn->service);
-
- if (strequal(handler, "default"))
- handler = "ipc";
+ const char **handlers = lp_ntvfs_handler(snum);
+ int i;
+ struct ntvfs_context *ctx;
- req->conn->ntvfs_ops = ntvfs_backend_byname(handler, req->conn->type);
+ if (!handlers) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ ctx = talloc_zero(mem_ctx, struct ntvfs_context);
+ NT_STATUS_HAVE_NO_MEMORY(ctx);
+ ctx->protocol = protocol;
+ ctx->type = type;
+ ctx->config.snum = snum;
+ ctx->event_ctx = ev;
+ ctx->msg_ctx = msg;
+ ctx->server_id = server_id;
+
+ for (i=0; handlers[i]; i++) {
+ struct ntvfs_module_context *ntvfs;
+
+ ntvfs = talloc_zero(ctx, struct ntvfs_module_context);
+ NT_STATUS_HAVE_NO_MEMORY(ntvfs);
+ ntvfs->ctx = ctx;
+ ntvfs->ops = ntvfs_backend_byname(handlers[i], ctx->type);
+ if (!ntvfs->ops) {
+ DEBUG(1,("ntvfs_init_connection: failed to find backend=%s, type=%d\n",
+ handlers[i], ctx->type));
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+ ntvfs->depth = i;
+ DLIST_ADD_END(ctx->modules, ntvfs, struct ntvfs_module_context *);
+ }
- if (!req->conn->ntvfs_ops) {
- DEBUG(1,("ntvfs_init_connection: failed to find backend=%s, type=%d\n", handler, req->conn->type));
- return NT_STATUS_UNSUCCESSFUL;
+ if (!ctx->modules) {
+ return NT_STATUS_INTERNAL_ERROR;
}
+ *_ctx = ctx;
+ return NT_STATUS_OK;
+}
+
+NTSTATUS ntvfs_init(void)
+{
+ init_module_fn static_init[] = STATIC_ntvfs_MODULES;
+ init_module_fn *shared_init = load_samba_modules(NULL, "ntvfs");
+
+ run_init_functions(static_init);
+ run_init_functions(shared_init);
+
+ talloc_free(shared_init);
+
return NT_STATUS_OK;
}
git.samba.org / gd / samba / .git / blobdiff