Rev 4459 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4459 | decky | 1 | /* |
| 2 | * Copyright (c) 2009 Martin Decky |
||
| 3 | * All rights reserved. |
||
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 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 |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 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 |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 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 |
||
| 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 |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 29 | /** @addtogroup ns |
||
| 30 | * @{ |
||
| 31 | */ |
||
| 32 | |||
| 33 | #include <ipc/ipc.h> |
||
| 34 | #include <ipc/services.h> |
||
| 35 | #include <libadt/list.h> |
||
| 36 | #include <bool.h> |
||
| 37 | #include <errno.h> |
||
| 38 | #include <assert.h> |
||
| 39 | #include <stdio.h> |
||
| 40 | #include <malloc.h> |
||
| 4496 | decky | 41 | #include <loader/loader.h> |
| 4459 | decky | 42 | #include "clonable.h" |
| 43 | #include "ns.h" |
||
| 44 | |||
| 45 | /** Request for connection to a clonable service. */ |
||
| 46 | typedef struct { |
||
| 47 | link_t link; |
||
| 48 | ipcarg_t service; |
||
| 49 | ipc_call_t call; |
||
| 50 | ipc_callid_t callid; |
||
| 51 | } cs_req_t; |
||
| 52 | |||
| 53 | /** List of clonable-service connection requests. */ |
||
| 54 | static link_t cs_req; |
||
| 55 | |||
| 56 | int clonable_init(void) |
||
| 57 | { |
||
| 58 | list_initialize(&cs_req); |
||
| 59 | return EOK; |
||
| 60 | } |
||
| 61 | |||
| 62 | /** Return true if @a service is clonable. */ |
||
| 63 | bool service_clonable(int service) |
||
| 64 | { |
||
| 65 | return (service == SERVICE_LOAD); |
||
| 66 | } |
||
| 67 | |||
| 68 | /** Register clonable service. |
||
| 69 | * |
||
| 70 | * @param service Service to be registered. |
||
| 71 | * @param phone Phone to be used for connections to the service. |
||
| 72 | * @param call Pointer to call structure. |
||
| 73 | * |
||
| 74 | */ |
||
| 75 | void register_clonable(ipcarg_t service, ipcarg_t phone, ipc_call_t *call, |
||
| 76 | ipc_callid_t callid) |
||
| 77 | { |
||
| 78 | if (list_empty(&cs_req)) { |
||
| 79 | /* There was no pending connection request. */ |
||
| 80 | printf(NAME ": Unexpected clonable server.\n"); |
||
| 81 | ipc_answer_0(callid, EBUSY); |
||
| 82 | return; |
||
| 83 | } |
||
| 84 | |||
| 85 | cs_req_t *csr = list_get_instance(cs_req.next, cs_req_t, link); |
||
| 86 | list_remove(&csr->link); |
||
| 87 | |||
| 88 | /* Currently we can only handle a single type of clonable service. */ |
||
| 89 | assert(csr->service == SERVICE_LOAD); |
||
| 90 | |||
| 91 | ipc_answer_0(callid, EOK); |
||
| 92 | |||
| 93 | ipc_forward_fast(csr->callid, phone, IPC_GET_ARG2(csr->call), |
||
| 94 | IPC_GET_ARG3(csr->call), 0, IPC_FF_NONE); |
||
| 95 | |||
| 96 | free(csr); |
||
| 97 | ipc_hangup(phone); |
||
| 98 | } |
||
| 99 | |||
| 100 | /** Connect client to clonable service. |
||
| 101 | * |
||
| 102 | * @param service Service to be connected to. |
||
| 103 | * @param call Pointer to call structure. |
||
| 104 | * @param callid Call ID of the request. |
||
| 105 | * |
||
| 106 | * @return Zero on success or a value from @ref errno.h. |
||
| 107 | * |
||
| 108 | */ |
||
| 109 | void connect_to_clonable(ipcarg_t service, ipc_call_t *call, |
||
| 110 | ipc_callid_t callid) |
||
| 111 | { |
||
| 112 | assert(service == SERVICE_LOAD); |
||
| 113 | |||
| 114 | cs_req_t *csr = malloc(sizeof(cs_req_t)); |
||
| 115 | if (csr == NULL) { |
||
| 116 | ipc_answer_0(callid, ENOMEM); |
||
| 117 | return; |
||
| 118 | } |
||
| 119 | |||
| 120 | /* Spawn a loader. */ |
||
| 121 | int rc = loader_spawn("loader"); |
||
| 122 | |||
| 123 | if (rc < 0) { |
||
| 124 | free(csr); |
||
| 125 | ipc_answer_0(callid, rc); |
||
| 126 | return; |
||
| 127 | } |
||
| 128 | |||
| 129 | csr->service = service; |
||
| 130 | csr->call = *call; |
||
| 131 | csr->callid = callid; |
||
| 132 | |||
| 133 | /* |
||
| 134 | * We can forward the call only after the server we spawned connects |
||
| 135 | * to us. Meanwhile we might need to service more connection requests. |
||
| 136 | * Thus we store the call in a queue. |
||
| 137 | */ |
||
| 138 | list_append(&csr->link, &cs_req); |
||
| 139 | } |
||
| 140 | |||
| 141 | /** |
||
| 142 | * @} |
||
| 143 | */ |