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448483199f
We now use a different system for initializing the modules for a subsystem.
Most subsystems now have an init function that looks something like this:
init_module_fn static_init[] = STATIC_AUTH_MODULES;
init_module_fn *shared_init = load_samba_modules(NULL, "auth");
run_init_functions(static_init);
run_init_functions(shared_init);
talloc_free(shared_init);
I hope to eliminate the other init functions later on (the
init_programname_subsystems; defines).
(This used to be commit b6d2ad4ce0
)
174 lines
4.5 KiB
C
174 lines
4.5 KiB
C
/*
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Unix SMB/CIFS implementation.
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NTVFS base code
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Copyright (C) Andrew Tridgell 2003
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Copyright (C) Stefan (metze) Metzmacher 2004
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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this implements the core code for all NTVFS modules. Backends register themselves here.
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*/
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#include "includes.h"
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#include "dlinklist.h"
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#include "smb_server/smb_server.h"
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/* the list of currently registered NTVFS backends, note that there
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* can be more than one backend with the same name, as long as they
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* have different typesx */
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static struct ntvfs_backend {
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const struct ntvfs_ops *ops;
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} *backends = NULL;
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static int num_backends;
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/*
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register a NTVFS backend.
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The 'name' can be later used by other backends to find the operations
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structure for this backend.
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The 'type' is used to specify whether this is for a disk, printer or IPC$ share
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*/
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NTSTATUS ntvfs_register(const void *_ops)
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{
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const struct ntvfs_ops *ops = _ops;
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struct ntvfs_ops *new_ops;
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if (ntvfs_backend_byname(ops->name, ops->type) != NULL) {
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/* its already registered! */
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DEBUG(0,("NTVFS backend '%s' for type %d already registered\n",
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ops->name, (int)ops->type));
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return NT_STATUS_OBJECT_NAME_COLLISION;
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}
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backends = realloc_p(backends, struct ntvfs_backend, num_backends+1);
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if (!backends) {
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smb_panic("out of memory in ntvfs_register");
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}
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new_ops = smb_xmemdup(ops, sizeof(*ops));
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new_ops->name = smb_xstrdup(ops->name);
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backends[num_backends].ops = new_ops;
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num_backends++;
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DEBUG(3,("NTVFS backend '%s' for type %d registered\n",
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ops->name,ops->type));
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return NT_STATUS_OK;
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}
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/*
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return the operations structure for a named backend of the specified type
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*/
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const struct ntvfs_ops *ntvfs_backend_byname(const char *name, enum ntvfs_type type)
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{
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int i;
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for (i=0;i<num_backends;i++) {
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if (backends[i].ops->type == type &&
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strcmp(backends[i].ops->name, name) == 0) {
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return backends[i].ops;
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}
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}
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return NULL;
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}
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/*
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return the NTVFS interface version, and the size of some critical types
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This can be used by backends to either detect compilation errors, or provide
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multiple implementations for different smbd compilation options in one module
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*/
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const struct ntvfs_critical_sizes *ntvfs_interface_version(void)
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{
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static const struct ntvfs_critical_sizes critical_sizes = {
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NTVFS_INTERFACE_VERSION,
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sizeof(struct ntvfs_critical_sizes),
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sizeof(struct ntvfs_context),
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sizeof(struct ntvfs_module_context),
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sizeof(struct ntvfs_ops),
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sizeof(struct ntvfs_async_state),
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sizeof(struct smbsrv_tcon),
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sizeof(struct smbsrv_request),
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};
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return &critical_sizes;
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}
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/*
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initialise a connection structure to point at a NTVFS backend
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*/
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NTSTATUS ntvfs_init_connection(struct smbsrv_request *req, enum ntvfs_type type)
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{
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const char **handlers = lp_ntvfs_handler(req->tcon->service);
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int i;
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struct ntvfs_context *ctx;
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if (!handlers) {
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return NT_STATUS_INTERNAL_ERROR;
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}
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ctx = talloc(req->tcon, struct ntvfs_context);
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NT_STATUS_HAVE_NO_MEMORY(ctx);
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ctx->type = type;
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ctx->modules = NULL;
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for (i=0; handlers[i]; i++) {
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struct ntvfs_module_context *ntvfs;
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ntvfs = talloc(ctx, struct ntvfs_module_context);
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NT_STATUS_HAVE_NO_MEMORY(ntvfs);
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ntvfs->ops = ntvfs_backend_byname(handlers[i], ctx->type);
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if (!ntvfs->ops) {
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DEBUG(1,("ntvfs_init_connection: failed to find backend=%s, type=%d\n",
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handlers[i], ctx->type));
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return NT_STATUS_INTERNAL_ERROR;
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}
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ntvfs->depth = i;
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DLIST_ADD_END(ctx->modules, ntvfs, struct ntvfs_module_context *);
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}
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if (!ctx->modules) {
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return NT_STATUS_INTERNAL_ERROR;
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}
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req->tcon->ntvfs_ctx = ctx;
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return NT_STATUS_OK;
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}
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NTSTATUS ntvfs_init(void)
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{
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init_module_fn static_init[] = STATIC_NTVFS_MODULES;
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init_module_fn *shared_init = load_samba_modules(NULL, "ntvfs");
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run_init_functions(static_init);
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run_init_functions(shared_init);
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talloc_free(shared_init);
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return NT_STATUS_OK;
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}
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