2 Unix SMB/CIFS implementation.
4 Copyright (C) Stefan Metzmacher 2004
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 this implements common utility functions that many NTVFS backends may wish to use
24 #include "lib/util/dlinklist.h"
25 #include "ntvfs/ntvfs.h"
28 _PUBLIC_ struct ntvfs_request *ntvfs_request_create(struct ntvfs_context *ctx, TALLOC_CTX *mem_ctx,
29 struct auth_session_info *session_info,
31 struct timeval request_time,
33 void (*send_fn)(struct ntvfs_request *),
36 struct ntvfs_request *req;
37 struct ntvfs_async_state *async;
39 req = talloc(mem_ctx, struct ntvfs_request);
40 if (!req) return NULL;
42 req->async_states = NULL;
43 req->session_info = session_info;
45 req->statistics.request_time = request_time;
47 async = talloc(req, struct ntvfs_async_state);
48 if (!async) goto failed;
51 async->private_data = private_data;
52 async->send_fn = send_fn;
53 async->status = NT_STATUS_INTERNAL_ERROR;
56 DLIST_ADD(req->async_states, async);
64 _PUBLIC_ NTSTATUS ntvfs_async_state_push(struct ntvfs_module_context *ntvfs,
65 struct ntvfs_request *req,
67 void (*send_fn)(struct ntvfs_request *))
69 struct ntvfs_async_state *async;
71 async = talloc(req, struct ntvfs_async_state);
72 NT_STATUS_HAVE_NO_MEMORY(async);
74 async->state = req->async_states->state;
75 async->private_data = private_data;
76 async->send_fn = send_fn;
77 async->status = NT_STATUS_INTERNAL_ERROR;
81 DLIST_ADD(req->async_states, async);
86 _PUBLIC_ void ntvfs_async_state_pop(struct ntvfs_request *req)
88 struct ntvfs_async_state *async;
90 async = req->async_states;
92 DLIST_REMOVE(req->async_states, async);
94 req->async_states->state = async->state;
95 req->async_states->status = async->status;
100 _PUBLIC_ NTSTATUS ntvfs_handle_new(struct ntvfs_module_context *ntvfs,
101 struct ntvfs_request *req,
102 struct ntvfs_handle **h)
104 if (!ntvfs->ctx->handles.create_new) {
105 return NT_STATUS_NOT_IMPLEMENTED;
107 return ntvfs->ctx->handles.create_new(ntvfs->ctx->handles.private_data, req, h);
110 _PUBLIC_ NTSTATUS ntvfs_handle_set_backend_data(struct ntvfs_handle *h,
111 struct ntvfs_module_context *ntvfs,
112 TALLOC_CTX *private_data)
114 struct ntvfs_handle_data *d;
115 bool first_time = h->backend_data?false:true;
117 for (d=h->backend_data; d; d = d->next) {
118 if (d->owner != ntvfs) continue;
119 d->private_data = talloc_steal(d, private_data);
123 d = talloc(h, struct ntvfs_handle_data);
124 NT_STATUS_HAVE_NO_MEMORY(d);
126 d->private_data = talloc_steal(d, private_data);
128 DLIST_ADD(h->backend_data, d);
132 status = h->ctx->handles.make_valid(h->ctx->handles.private_data, h);
133 NT_STATUS_NOT_OK_RETURN(status);
139 _PUBLIC_ void *ntvfs_handle_get_backend_data(struct ntvfs_handle *h,
140 struct ntvfs_module_context *ntvfs)
142 struct ntvfs_handle_data *d;
144 for (d=h->backend_data; d; d = d->next) {
145 if (d->owner != ntvfs) continue;
146 return d->private_data;
152 _PUBLIC_ void ntvfs_handle_remove_backend_data(struct ntvfs_handle *h,
153 struct ntvfs_module_context *ntvfs)
155 struct ntvfs_handle_data *d,*n;
157 for (d=h->backend_data; d; d = n) {
159 if (d->owner != ntvfs) continue;
160 DLIST_REMOVE(h->backend_data, d);
165 if (h->backend_data) return;
167 /* if there's no backend_data anymore, destroy the handle */
168 h->ctx->handles.destroy(h->ctx->handles.private_data, h);
171 _PUBLIC_ struct ntvfs_handle *ntvfs_handle_search_by_wire_key(struct ntvfs_module_context *ntvfs,
172 struct ntvfs_request *req,
173 const DATA_BLOB *key)
175 if (!ntvfs->ctx->handles.search_by_wire_key) {
178 return ntvfs->ctx->handles.search_by_wire_key(ntvfs->ctx->handles.private_data, req, key);
181 _PUBLIC_ DATA_BLOB ntvfs_handle_get_wire_key(struct ntvfs_handle *h, TALLOC_CTX *mem_ctx)
183 return h->ctx->handles.get_wire_key(h->ctx->handles.private_data, h, mem_ctx);
186 _PUBLIC_ NTSTATUS ntvfs_set_handle_callbacks(struct ntvfs_context *ntvfs,
187 NTSTATUS (*create_new)(void *private_data, struct ntvfs_request *req, struct ntvfs_handle **h),
188 NTSTATUS (*make_valid)(void *private_data, struct ntvfs_handle *h),
189 void (*destroy)(void *private_data, struct ntvfs_handle *h),
190 struct ntvfs_handle *(*search_by_wire_key)(void *private_data, struct ntvfs_request *req, const DATA_BLOB *key),
191 DATA_BLOB (*get_wire_key)(void *private_data, struct ntvfs_handle *handle, TALLOC_CTX *mem_ctx),
194 ntvfs->handles.create_new = create_new;
195 ntvfs->handles.make_valid = make_valid;
196 ntvfs->handles.destroy = destroy;
197 ntvfs->handles.search_by_wire_key = search_by_wire_key;
198 ntvfs->handles.get_wire_key = get_wire_key;
199 ntvfs->handles.private_data = private_data;