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 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
this implements the core code for all NTVFS modules. Backends register themselves here.
*/
#include "includes.h"
-
+#include "../lib/util/dlinklist.h"
+#include "ntvfs/ntvfs.h"
+#include "param/param.h"
+#include "lib/util/samba_modules.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 {
+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)
+NTSTATUS ntvfs_register(const struct ntvfs_ops *ops,
+ const struct ntvfs_critical_sizes *const sizes)
{
- const struct ntvfs_ops *ops = _ops;
struct ntvfs_ops *new_ops;
-
+
+ if (ntvfs_interface_differs(sizes)) {
+ DEBUG(0, ("NTVFS backend '%s' for type %d "
+ "failed version check\n",
+ ops->name, (int)ops->type));
+ return NT_STATUS_BAD_FUNCTION_TABLE;
+ }
+
if (ntvfs_backend_byname(ops->name, ops->type) != NULL) {
/* its already registered! */
DEBUG(0,("NTVFS backend '%s' for type %d already registered\n",
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");
}
This can be used by backends to either detect compilation errors, or provide
multiple implementations for different smbd compilation options in one module
*/
+
+static const NTVFS_CURRENT_CRITICAL_SIZES(critical_sizes);
+
const struct ntvfs_critical_sizes *ntvfs_interface_version(void)
{
- static const struct ntvfs_critical_sizes critical_sizes = {
- NTVFS_INTERFACE_VERSION,
- sizeof(struct ntvfs_ops),
- sizeof(SMB_OFF_T),
- sizeof(struct smbsrv_tcon),
- sizeof(struct request_context),
- };
-
return &critical_sizes;
}
+bool ntvfs_interface_differs(const struct ntvfs_critical_sizes *const iface)
+{
+ /* 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;
+
+ if (FIELD_DIFFERS(sizeof_ntvfs_async_state))
+ return true;
+
+ if (FIELD_DIFFERS(sizeof_ntvfs_request))
+ return true;
+
+ /* Versions match. */
+ return false;
+
+#undef FIELD_DIFFERS
+}
/*
- initialise the NTVFS subsystem
+ initialise a connection structure to point at a NTVFS backend
*/
-BOOL ntvfs_init(void)
+NTSTATUS ntvfs_init_connection(TALLOC_CTX *mem_ctx, struct share_config *scfg, enum ntvfs_type type,
+ enum protocol_types protocol,
+ uint64_t ntvfs_client_caps,
+ struct tevent_context *ev, struct imessaging_context *msg,
+ struct loadparm_context *lp_ctx,
+ struct server_id server_id, struct ntvfs_context **_ctx)
{
- NTSTATUS status;
+ const char **handlers = share_string_list_option(mem_ctx, scfg, SHARE_NTVFS_HANDLER);
+ int i;
+ struct ntvfs_context *ctx;
- status = register_subsystem("ntvfs", ntvfs_register);
- if (!NT_STATUS_IS_OK(status)) {
- return False;
+ if (!handlers) {
+ return NT_STATUS_INTERNAL_ERROR;
}
- /* FIXME: Perhaps panic if a basic backend, such as IPC, fails to initialise? */
- static_init_ntvfs;
+ ctx = talloc_zero(mem_ctx, struct ntvfs_context);
+ NT_STATUS_HAVE_NO_MEMORY(ctx);
+ ctx->protocol = protocol;
+ ctx->client_caps = ntvfs_client_caps;
+ ctx->type = type;
+ ctx->config = talloc_steal(ctx, scfg);
+ ctx->event_ctx = ev;
+ ctx->msg_ctx = msg;
+ ctx->server_id = server_id;
+ ctx->lp_ctx = lp_ctx;
+
+ 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 *);
+ }
- DEBUG(3,("NTVFS subsystem version %d initialised\n", NTVFS_INTERFACE_VERSION));
- return True;
-}
+ if (!ctx->modules) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+ *_ctx = ctx;
+ return NT_STATUS_OK;
+}
/*
- initialise a connection structure to point at a NTVFS backend
-*/
-NTSTATUS ntvfs_init_connection(struct request_context *req)
+ adds the IPC$ share, needed for RPC calls
+ */
+static NTSTATUS ntvfs_add_ipc_share(struct loadparm_context *lp_ctx)
{
- const char *handler = lp_ntvfs_handler(req->tcon->service);
+ struct loadparm_service *ipc;
- req->tcon->ntvfs_ops = ntvfs_backend_byname(handler, req->tcon->type);
-
- if (!req->tcon->ntvfs_ops) {
- DEBUG(1,("ntvfs_init_connection: failed to find backend=%s, type=%d\n", handler, req->tcon->type));
- return NT_STATUS_UNSUCCESSFUL;
+ if (lpcfg_service(lp_ctx, "IPC$")) {
+ /* it has already been defined in smb.conf or elsewhere */
+ return NT_STATUS_OK;
}
+ ipc = lpcfg_add_service(lp_ctx, NULL, "IPC$");
+ NT_STATUS_HAVE_NO_MEMORY(ipc);
+
+ lpcfg_do_service_parameter(lp_ctx, ipc, "comment", "IPC Service");
+ lpcfg_do_service_parameter(lp_ctx, ipc, "path", "/dev/null");
+ lpcfg_do_service_parameter(lp_ctx, ipc, "ntvfs handler", "default");
+ lpcfg_do_service_parameter(lp_ctx, ipc, "browseable", "No");
+ lpcfg_do_service_parameter(lp_ctx, ipc, "fstype", "IPC");
+
+ return NT_STATUS_OK;
+}
+
+NTSTATUS ntvfs_init(struct loadparm_context *lp_ctx)
+{
+ static bool initialized = false;
+#define _MODULE_PROTO(init) extern NTSTATUS init(void);
+ STATIC_ntvfs_MODULES_PROTO;
+ init_module_fn static_init[] = { STATIC_ntvfs_MODULES };
+ init_module_fn *shared_init;
+
+ if (initialized) return NT_STATUS_OK;
+ initialized = true;
+
+ shared_init = load_samba_modules(NULL, "ntvfs");
+
+ run_init_functions(static_init);
+ run_init_functions(shared_init);
+
+ talloc_free(shared_init);
+
+ ntvfs_add_ipc_share(lp_ctx);
+
return NT_STATUS_OK;
}
git.samba.org / samba.git / blobdiff