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1 | /* |
1 | /* |
2 | * Copyright (c) 2006 Ondrej Palkovsky |
2 | * Copyright (c) 2006 Ondrej Palkovsky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup ns |
29 | /** @addtogroup ns |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** |
33 | /** |
34 | * @file ns.c |
34 | * @file ns.c |
35 | * @brief Naming service for HelenOS IPC. |
35 | * @brief Naming service for HelenOS IPC. |
36 | */ |
36 | */ |
37 | 37 | ||
38 | 38 | ||
39 | #include <ipc/ipc.h> |
39 | #include <ipc/ipc.h> |
40 | #include <ipc/ns.h> |
40 | #include <ipc/ns.h> |
41 | #include <ipc/services.h> |
41 | #include <ipc/services.h> |
42 | #include <stdio.h> |
42 | #include <stdio.h> |
43 | #include <unistd.h> |
43 | #include <unistd.h> |
44 | #include <stdlib.h> |
44 | #include <stdlib.h> |
45 | #include <errno.h> |
45 | #include <errno.h> |
46 | #include <assert.h> |
46 | #include <assert.h> |
47 | #include <libadt/list.h> |
47 | #include <libadt/list.h> |
48 | #include <libadt/hash_table.h> |
48 | #include <libadt/hash_table.h> |
49 | #include <sysinfo.h> |
49 | #include <sysinfo.h> |
50 | #include <ddi.h> |
50 | #include <ddi.h> |
51 | #include <as.h> |
51 | #include <as.h> |
52 | 52 | ||
53 | #define NAME "NS" |
53 | #define NAME "NS" |
54 | 54 | ||
55 | #define NS_HASH_TABLE_CHAINS 20 |
55 | #define NS_HASH_TABLE_CHAINS 20 |
56 | 56 | ||
57 | static int register_service(ipcarg_t service, ipcarg_t phone, ipc_call_t *call); |
57 | static int register_service(ipcarg_t service, ipcarg_t phone, ipc_call_t *call); |
58 | static int connect_to_service(ipcarg_t service, ipc_call_t *call, |
58 | static int connect_to_service(ipcarg_t service, ipc_call_t *call, |
59 | ipc_callid_t callid); |
59 | ipc_callid_t callid); |
60 | 60 | ||
61 | /* Static functions implementing NS hash table operations. */ |
61 | /* Static functions implementing NS hash table operations. */ |
62 | static hash_index_t ns_hash(unsigned long *key); |
62 | static hash_index_t ns_hash(unsigned long *key); |
63 | static int ns_compare(unsigned long *key, hash_count_t keys, link_t *item); |
63 | static int ns_compare(unsigned long *key, hash_count_t keys, link_t *item); |
64 | static void ns_remove(link_t *item); |
64 | static void ns_remove(link_t *item); |
65 | 65 | ||
66 | /** Operations for NS hash table. */ |
66 | /** Operations for NS hash table. */ |
67 | static hash_table_operations_t ns_hash_table_ops = { |
67 | static hash_table_operations_t ns_hash_table_ops = { |
68 | .hash = ns_hash, |
68 | .hash = ns_hash, |
69 | .compare = ns_compare, |
69 | .compare = ns_compare, |
70 | .remove_callback = ns_remove |
70 | .remove_callback = ns_remove |
71 | }; |
71 | }; |
72 | 72 | ||
73 | /** NS hash table structure. */ |
73 | /** NS hash table structure. */ |
74 | static hash_table_t ns_hash_table; |
74 | static hash_table_t ns_hash_table; |
75 | 75 | ||
76 | /** NS hash table item. */ |
76 | /** NS hash table item. */ |
77 | typedef struct { |
77 | typedef struct { |
78 | link_t link; |
78 | link_t link; |
79 | ipcarg_t service; /**< Number of the service. */ |
79 | ipcarg_t service; /**< Number of the service. */ |
80 | ipcarg_t phone; /**< Phone registered with the service. */ |
80 | ipcarg_t phone; /**< Phone registered with the service. */ |
81 | ipcarg_t in_phone_hash; /**< Incoming phone hash. */ |
81 | ipcarg_t in_phone_hash; /**< Incoming phone hash. */ |
82 | } hashed_service_t; |
82 | } hashed_service_t; |
83 | 83 | ||
84 | static void *clockaddr = NULL; |
84 | static void *clockaddr = NULL; |
85 | static void *klogaddr = NULL; |
85 | static void *klogaddr = NULL; |
86 | 86 | ||
87 | static void get_as_area(ipc_callid_t callid, ipc_call_t *call, char *name, |
87 | static void get_as_area(ipc_callid_t callid, ipc_call_t *call, char *name, |
88 | void **addr) |
88 | void **addr) |
89 | { |
89 | { |
90 | void *ph_addr; |
90 | void *ph_addr; |
91 | 91 | ||
92 | if (!*addr) { |
92 | if (!*addr) { |
93 | ph_addr = (void *) sysinfo_value(name); |
93 | ph_addr = (void *) sysinfo_value(name); |
94 | if (!ph_addr) { |
94 | if (!ph_addr) { |
95 | ipc_answer_fast(callid, ENOENT, 0, 0); |
95 | ipc_answer_fast(callid, ENOENT, 0, 0); |
96 | return; |
96 | return; |
97 | } |
97 | } |
98 | *addr = as_get_mappable_page(PAGE_SIZE); |
98 | *addr = as_get_mappable_page(PAGE_SIZE); |
99 | physmem_map(ph_addr, *addr, 1, AS_AREA_READ | AS_AREA_CACHEABLE); |
99 | physmem_map(ph_addr, *addr, 1, AS_AREA_READ | AS_AREA_CACHEABLE); |
100 | } |
100 | } |
101 | ipc_answer_fast(callid, 0, (ipcarg_t) *addr, AS_AREA_READ); |
101 | ipc_answer_fast(callid, 0, (ipcarg_t) *addr, AS_AREA_READ); |
102 | } |
102 | } |
103 | 103 | ||
104 | int main(int argc, char **argv) |
104 | int main(int argc, char **argv) |
105 | { |
105 | { |
106 | ipc_call_t call; |
106 | ipc_call_t call; |
107 | ipc_callid_t callid; |
107 | ipc_callid_t callid; |
108 | 108 | ||
109 | ipcarg_t retval; |
109 | ipcarg_t retval; |
110 | 110 | ||
111 | if (!hash_table_create(&ns_hash_table, NS_HASH_TABLE_CHAINS, 3, |
111 | if (!hash_table_create(&ns_hash_table, NS_HASH_TABLE_CHAINS, 3, |
112 | &ns_hash_table_ops)) { |
112 | &ns_hash_table_ops)) { |
113 | return ENOMEM; |
113 | return ENOMEM; |
114 | } |
114 | } |
115 | 115 | ||
116 | while (1) { |
116 | while (1) { |
117 | callid = ipc_wait_for_call(&call); |
117 | callid = ipc_wait_for_call(&call); |
118 | switch (IPC_GET_METHOD(call)) { |
118 | switch (IPC_GET_METHOD(call)) { |
119 | case IPC_M_AS_AREA_RECV: |
119 | case IPC_M_AS_AREA_RECV: |
120 | switch (IPC_GET_ARG3(call)) { |
120 | switch (IPC_GET_ARG3(call)) { |
121 | case SERVICE_MEM_REALTIME: |
121 | case SERVICE_MEM_REALTIME: |
122 | get_as_area(callid, &call, "clock.faddr", |
122 | get_as_area(callid, &call, "clock.faddr", |
123 | &clockaddr); |
123 | &clockaddr); |
124 | break; |
124 | break; |
125 | case SERVICE_MEM_KLOG: |
125 | case SERVICE_MEM_KLOG: |
126 | get_as_area(callid, &call, "klog.faddr", |
126 | get_as_area(callid, &call, "klog.faddr", |
127 | &klogaddr); |
127 | &klogaddr); |
128 | break; |
128 | break; |
129 | default: |
129 | default: |
130 | ipc_answer_fast(callid, ENOENT, 0, 0); |
130 | ipc_answer_fast(callid, ENOENT, 0, 0); |
131 | } |
131 | } |
132 | continue; |
132 | continue; |
133 | case IPC_M_PHONE_HUNGUP: |
133 | case IPC_M_PHONE_HUNGUP: |
134 | retval = 0; |
134 | retval = 0; |
135 | break; |
135 | break; |
136 | case IPC_M_CONNECT_TO_ME: |
136 | case IPC_M_CONNECT_TO_ME: |
137 | /* |
137 | /* |
138 | * Server requests service registration. |
138 | * Server requests service registration. |
139 | */ |
139 | */ |
140 | retval = register_service(IPC_GET_ARG1(call), |
140 | retval = register_service(IPC_GET_ARG1(call), |
141 | IPC_GET_ARG3(call), &call); |
141 | IPC_GET_ARG3(call), &call); |
142 | break; |
142 | break; |
143 | case IPC_M_CONNECT_ME_TO: |
143 | case IPC_M_CONNECT_ME_TO: |
144 | /* |
144 | /* |
145 | * Client requests to be connected to a service. |
145 | * Client requests to be connected to a service. |
146 | */ |
146 | */ |
147 | retval = connect_to_service(IPC_GET_ARG1(call), &call, |
147 | retval = connect_to_service(IPC_GET_ARG1(call), &call, |
148 | callid); |
148 | callid); |
149 | break; |
149 | break; |
150 | default: |
150 | default: |
151 | retval = ENOENT; |
151 | retval = ENOENT; |
152 | break; |
152 | break; |
153 | } |
153 | } |
154 | if (!(callid & IPC_CALLID_NOTIFICATION)) { |
154 | if (!(callid & IPC_CALLID_NOTIFICATION)) { |
155 | ipc_answer_fast(callid, retval, 0, 0); |
155 | ipc_answer_fast(callid, retval, 0, 0); |
156 | } |
156 | } |
157 | } |
157 | } |
158 | } |
158 | } |
159 | 159 | ||
160 | /** Register service. |
160 | /** Register service. |
161 | * |
161 | * |
162 | * @param service Service to be registered. |
162 | * @param service Service to be registered. |
163 | * @param phone Phone to be used for connections to the service. |
163 | * @param phone Phone to be used for connections to the service. |
164 | * @param call Pointer to call structure. |
164 | * @param call Pointer to call structure. |
165 | * |
165 | * |
166 | * @return Zero on success or a value from @ref errno.h. |
166 | * @return Zero on success or a value from @ref errno.h. |
167 | */ |
167 | */ |
168 | int register_service(ipcarg_t service, ipcarg_t phone, ipc_call_t *call) |
168 | int register_service(ipcarg_t service, ipcarg_t phone, ipc_call_t *call) |
169 | { |
169 | { |
170 | unsigned long keys[3] = { |
170 | unsigned long keys[3] = { |
171 | service, |
171 | service, |
172 | call->in_phone_hash, |
172 | call->in_phone_hash, |
173 | 0 |
173 | 0 |
174 | }; |
174 | }; |
175 | hashed_service_t *hs; |
175 | hashed_service_t *hs; |
176 | 176 | ||
177 | if (hash_table_find(&ns_hash_table, keys)) { |
177 | if (hash_table_find(&ns_hash_table, keys)) { |
178 | return EEXISTS; |
178 | return EEXISTS; |
179 | } |
179 | } |
180 | 180 | ||
181 | hs = (hashed_service_t *) malloc(sizeof(hashed_service_t)); |
181 | hs = (hashed_service_t *) malloc(sizeof(hashed_service_t)); |
182 | if (!hs) { |
182 | if (!hs) { |
183 | return ENOMEM; |
183 | return ENOMEM; |
184 | } |
184 | } |
185 | 185 | ||
186 | link_initialize(&hs->link); |
186 | link_initialize(&hs->link); |
187 | hs->service = service; |
187 | hs->service = service; |
188 | hs->phone = phone; |
188 | hs->phone = phone; |
189 | hs->in_phone_hash = call->in_phone_hash; |
189 | hs->in_phone_hash = call->in_phone_hash; |
190 | hash_table_insert(&ns_hash_table, keys, &hs->link); |
190 | hash_table_insert(&ns_hash_table, keys, &hs->link); |
191 | 191 | ||
192 | return 0; |
192 | return 0; |
193 | } |
193 | } |
194 | 194 | ||
195 | /** Connect client to service. |
195 | /** Connect client to service. |
196 | * |
196 | * |
197 | * @param service Service to be connected to. |
197 | * @param service Service to be connected to. |
198 | * @param call Pointer to call structure. |
198 | * @param call Pointer to call structure. |
199 | * @param callid Call ID of the request. |
199 | * @param callid Call ID of the request. |
200 | * |
200 | * |
201 | * @return Zero on success or a value from @ref errno.h. |
201 | * @return Zero on success or a value from @ref errno.h. |
202 | */ |
202 | */ |
203 | int connect_to_service(ipcarg_t service, ipc_call_t *call, ipc_callid_t callid) |
203 | int connect_to_service(ipcarg_t service, ipc_call_t *call, ipc_callid_t callid) |
204 | { |
204 | { |
205 | unsigned long keys[3] = { service, 0, 0 }; |
205 | unsigned long keys[3] = { service, 0, 0 }; |
206 | link_t *hlp; |
206 | link_t *hlp; |
207 | hashed_service_t *hs; |
207 | hashed_service_t *hs; |
208 | 208 | ||
209 | hlp = hash_table_find(&ns_hash_table, keys); |
209 | hlp = hash_table_find(&ns_hash_table, keys); |
210 | if (!hlp) { |
210 | if (!hlp) { |
211 | return ENOENT; |
211 | return ENOENT; |
212 | } |
212 | } |
213 | hs = hash_table_get_instance(hlp, hashed_service_t, link); |
213 | hs = hash_table_get_instance(hlp, hashed_service_t, link); |
214 | return ipc_forward_fast(callid, hs->phone, 0, 0); |
214 | return ipc_forward_fast(callid, hs->phone, 0, 0); |
215 | } |
215 | } |
216 | 216 | ||
217 | /** Compute hash index into NS hash table. |
217 | /** Compute hash index into NS hash table. |
218 | * |
218 | * |
219 | * @param key Pointer keys. However, only the first key (i.e. service number) |
219 | * @param key Pointer keys. However, only the first key (i.e. service number) |
220 | * is used to compute the hash index. |
220 | * is used to compute the hash index. |
221 | * @return Hash index corresponding to key[0]. |
221 | * @return Hash index corresponding to key[0]. |
222 | */ |
222 | */ |
223 | hash_index_t ns_hash(unsigned long *key) |
223 | hash_index_t ns_hash(unsigned long *key) |
224 | { |
224 | { |
225 | assert(key); |
225 | assert(key); |
226 | return *key % NS_HASH_TABLE_CHAINS; |
226 | return *key % NS_HASH_TABLE_CHAINS; |
227 | } |
227 | } |
228 | 228 | ||
229 | /** Compare a key with hashed item. |
229 | /** Compare a key with hashed item. |
230 | * |
230 | * |
231 | * This compare function always ignores the third key. |
231 | * This compare function always ignores the third key. |
232 | * It exists only to make it possible to remove records |
232 | * It exists only to make it possible to remove records |
233 | * originating from connection with key[1] in_phone_hash |
233 | * originating from connection with key[1] in_phone_hash |
234 | * value. Note that this is close to being classified |
234 | * value. Note that this is close to being classified |
235 | * as a nasty hack. |
235 | * as a nasty hack. |
236 | * |
236 | * |
237 | * @param key Array of keys. |
237 | * @param key Array of keys. |
238 | * @param keys Must be lesser or equal to 3. |
238 | * @param keys Must be lesser or equal to 3. |
239 | * @param item Pointer to a hash table item. |
239 | * @param item Pointer to a hash table item. |
240 | * @return Non-zero if the key matches the item, zero otherwise. |
240 | * @return Non-zero if the key matches the item, zero otherwise. |
241 | */ |
241 | */ |
242 | int ns_compare(unsigned long key[], hash_count_t keys, link_t *item) |
242 | int ns_compare(unsigned long key[], hash_count_t keys, link_t *item) |
243 | { |
243 | { |
244 | hashed_service_t *hs; |
244 | hashed_service_t *hs; |
245 | 245 | ||
246 | assert(key); |
246 | assert(key); |
247 | assert(keys <= 3); |
247 | assert(keys <= 3); |
248 | assert(item); |
248 | assert(item); |
249 | 249 | ||
250 | hs = hash_table_get_instance(item, hashed_service_t, link); |
250 | hs = hash_table_get_instance(item, hashed_service_t, link); |
251 | 251 | ||
252 | if (keys == 2) |
252 | if (keys == 2) |
253 | return key[1] == hs->in_phone_hash; |
253 | return key[1] == hs->in_phone_hash; |
254 | else |
254 | else |
255 | return key[0] == hs->service; |
255 | return key[0] == hs->service; |
256 | } |
256 | } |
257 | 257 | ||
258 | /** Perform actions after removal of item from the hash table. |
258 | /** Perform actions after removal of item from the hash table. |
259 | * |
259 | * |
260 | * @param item Item that was removed from the hash table. |
260 | * @param item Item that was removed from the hash table. |
261 | */ |
261 | */ |
262 | void ns_remove(link_t *item) |
262 | void ns_remove(link_t *item) |
263 | { |
263 | { |
264 | assert(item); |
264 | assert(item); |
265 | free(hash_table_get_instance(item, hashed_service_t, link)); |
265 | free(hash_table_get_instance(item, hashed_service_t, link)); |
266 | } |
266 | } |
267 | 267 | ||
268 | /** |
268 | /** |
269 | * @} |
269 | * @} |
270 | */ |
270 | */ |
271 | 271 |