2 Unix SMB/CIFS implementation.
5 Copyright (C) Andrew Tridgell 2003
6 Copyright (C) Stefan (metze) Metzmacher 2004
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 this implements the core code for all NTVFS modules. Backends register themselves here.
27 #include "dlinklist.h"
28 #include "smb_server/smb_server.h"
30 #include "ntvfs/ntvfs.h"
32 /* the list of currently registered NTVFS backends, note that there
33 * can be more than one backend with the same name, as long as they
34 * have different typesx */
35 static struct ntvfs_backend {
36 const struct ntvfs_ops *ops;
38 static int num_backends;
41 register a NTVFS backend.
43 The 'name' can be later used by other backends to find the operations
44 structure for this backend.
46 The 'type' is used to specify whether this is for a disk, printer or IPC$ share
48 _PUBLIC_ NTSTATUS ntvfs_register(const void *_ops)
50 const struct ntvfs_ops *ops = _ops;
51 struct ntvfs_ops *new_ops;
53 if (ntvfs_backend_byname(ops->name, ops->type) != NULL) {
54 /* its already registered! */
55 DEBUG(0,("NTVFS backend '%s' for type %d already registered\n",
56 ops->name, (int)ops->type));
57 return NT_STATUS_OBJECT_NAME_COLLISION;
60 backends = realloc_p(backends, struct ntvfs_backend, num_backends+1);
62 smb_panic("out of memory in ntvfs_register");
65 new_ops = smb_xmemdup(ops, sizeof(*ops));
66 new_ops->name = smb_xstrdup(ops->name);
68 backends[num_backends].ops = new_ops;
72 DEBUG(3,("NTVFS backend '%s' for type %d registered\n",
73 ops->name,ops->type));
80 return the operations structure for a named backend of the specified type
82 _PUBLIC_ const struct ntvfs_ops *ntvfs_backend_byname(const char *name, enum ntvfs_type type)
86 for (i=0;i<num_backends;i++) {
87 if (backends[i].ops->type == type &&
88 strcmp(backends[i].ops->name, name) == 0) {
89 return backends[i].ops;
98 return the NTVFS interface version, and the size of some critical types
99 This can be used by backends to either detect compilation errors, or provide
100 multiple implementations for different smbd compilation options in one module
102 static const struct ntvfs_critical_sizes critical_sizes = {
103 .interface_version = NTVFS_INTERFACE_VERSION,
104 .sizeof_ntvfs_critical_sizes = sizeof(struct ntvfs_critical_sizes),
105 .sizeof_ntvfs_context = sizeof(struct ntvfs_context),
106 .sizeof_ntvfs_module_context = sizeof(struct ntvfs_module_context),
107 .sizeof_ntvfs_ops = sizeof(struct ntvfs_ops),
108 .sizeof_ntvfs_async_state = sizeof(struct ntvfs_async_state),
109 .sizeof_ntvfs_request = sizeof(struct ntvfs_request),
112 _PUBLIC_ const struct ntvfs_critical_sizes *ntvfs_interface_version(void)
114 return &critical_sizes;
119 initialise a connection structure to point at a NTVFS backend
121 NTSTATUS ntvfs_init_connection(struct ntvfs_request *req, enum ntvfs_type type)
123 const char **handlers = lp_ntvfs_handler(req->tcon->service);
125 struct ntvfs_context *ctx;
128 return NT_STATUS_INTERNAL_ERROR;
131 ctx = talloc(req->tcon, struct ntvfs_context);
132 NT_STATUS_HAVE_NO_MEMORY(ctx);
136 for (i=0; handlers[i]; i++) {
137 struct ntvfs_module_context *ntvfs;
139 ntvfs = talloc(ctx, struct ntvfs_module_context);
140 NT_STATUS_HAVE_NO_MEMORY(ntvfs);
142 ntvfs->private_data = NULL;
144 ntvfs->ops = ntvfs_backend_byname(handlers[i], ctx->type);
146 DEBUG(1,("ntvfs_init_connection: failed to find backend=%s, type=%d\n",
147 handlers[i], ctx->type));
148 return NT_STATUS_INTERNAL_ERROR;
151 DLIST_ADD_END(ctx->modules, ntvfs, struct ntvfs_module_context *);
155 return NT_STATUS_INTERNAL_ERROR;
158 req->tcon->ntvfs_ctx = ctx;
163 NTSTATUS ntvfs_init(void)
165 init_module_fn static_init[] = STATIC_ntvfs_MODULES;
166 init_module_fn *shared_init = load_samba_modules(NULL, "ntvfs");
168 run_init_functions(static_init);
169 run_init_functions(shared_init);
171 talloc_free(shared_init);