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1 | /* |
1 | /* |
2 | * Copyright (c) 2008 Lukas Mejdrech |
2 | * Copyright (c) 2009 Lukas Mejdrech |
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: |
Line 24... | Line 24... | ||
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 net |
29 | /** @addtogroup packet |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** @file |
33 | /** @file |
- | 34 | * Packet server implementation. |
|
34 | */ |
35 | */ |
35 | 36 | ||
36 | #include <async.h> |
37 | #include <async.h> |
37 | #include <align.h> |
38 | #include <align.h> |
38 | #include <errno.h> |
39 | #include <errno.h> |
Line 48... | Line 49... | ||
48 | 49 | ||
49 | #include "packet.h" |
50 | #include "packet.h" |
50 | #include "packet_header.h" |
51 | #include "packet_header.h" |
51 | #include "packet_server.h" |
52 | #include "packet_server.h" |
52 | 53 | ||
- | 54 | /** Returns the packet identifier message parameter. |
|
- | 55 | */ |
|
53 | #define IPC_GET_ID( call ) ( packet_id_t ) IPC_GET_ARG1( * call ) |
56 | #define IPC_GET_ID( call ) ( packet_id_t ) IPC_GET_ARG1( * call ) |
- | 57 | ||
- | 58 | /** Returns the owner message parameter. |
|
- | 59 | */ |
|
54 | #define IPC_GET_OWNER( call ) ( services_t ) IPC_GET_ARG1( * call ) |
60 | #define IPC_GET_OWNER( call ) ( services_t ) IPC_GET_ARG1( * call ) |
- | 61 | ||
- | 62 | /** Returns the maximal content length message parameter. |
|
- | 63 | */ |
|
55 | #define IPC_GET_CONTENT( call ) ( size_t ) IPC_GET_ARG2( * call ) |
64 | #define IPC_GET_CONTENT( call ) ( size_t ) IPC_GET_ARG2( * call ) |
- | 65 | ||
- | 66 | /** Returns the maximal address length message parameter. |
|
- | 67 | */ |
|
56 | #define IPC_GET_ADDR_LEN( call ) ( size_t ) IPC_GET_ARG3( * call ) |
68 | #define IPC_GET_ADDR_LEN( call ) ( size_t ) IPC_GET_ARG3( * call ) |
- | 69 | ||
- | 70 | /** Returns the maximal prefix length message parameter. |
|
- | 71 | */ |
|
57 | #define IPC_GET_PREFIX( call ) ( size_t ) IPC_GET_ARG4( * call ) |
72 | #define IPC_GET_PREFIX( call ) ( size_t ) IPC_GET_ARG4( * call ) |
- | 73 | ||
- | 74 | /** Returns the maximal suffix length message parameter. |
|
- | 75 | */ |
|
58 | #define IPC_GET_SUFIX( call ) ( size_t ) IPC_GET_ARG5( * call ) |
76 | #define IPC_GET_SUFIX( call ) ( size_t ) IPC_GET_ARG5( * call ) |
59 | 77 | ||
60 | #define FREE_QUEUES_COUNT 7 |
78 | #define FREE_QUEUES_COUNT 7 |
61 | 79 | ||
- | 80 | /** Packet server global data. |
|
- | 81 | */ |
|
62 | static struct{ |
82 | static struct{ |
- | 83 | /** Free packet queues. |
|
- | 84 | */ |
|
63 | packet_t free[ FREE_QUEUES_COUNT ]; |
85 | packet_t free[ FREE_QUEUES_COUNT ]; |
- | 86 | /** Packet length upper bounds of the free packet queues. |
|
- | 87 | * The maximal lengths of packets in each queue in the ascending order. |
|
- | 88 | * The last queue is not limited. |
|
- | 89 | */ |
|
64 | int sizes[ FREE_QUEUES_COUNT ]; |
90 | int sizes[ FREE_QUEUES_COUNT ]; |
- | 91 | /** Total packets allocated. |
|
- | 92 | */ |
|
65 | unsigned int count; |
93 | unsigned int count; |
66 | } ps_globals = { |
94 | } ps_globals = { |
67 | { NULL, NULL, NULL, NULL, NULL, NULL, NULL }, |
95 | { NULL, NULL, NULL, NULL, NULL, NULL, NULL }, |
68 | { PAGE_SIZE, PAGE_SIZE * 2, PAGE_SIZE * 4, PAGE_SIZE * 8, PAGE_SIZE * 16, PAGE_SIZE * 32, PAGE_SIZE * 64 }, |
96 | { PAGE_SIZE, PAGE_SIZE * 2, PAGE_SIZE * 4, PAGE_SIZE * 8, PAGE_SIZE * 16, PAGE_SIZE * 32, PAGE_SIZE * 64 }, |
69 | 0 |
97 | 0 |
70 | }; |
98 | }; |
71 | 99 | ||
- | 100 | /** Releases the packet and returns it to the appropriate free packet queue. |
|
- | 101 | * @param packet The packet to be released. Input parameter. |
|
- | 102 | */ |
|
72 | void packet_release( packet_t packet ); |
103 | void packet_release( packet_t packet ); |
- | 104 | ||
- | 105 | /** Returns the packet of dimensions at least as given. |
|
- | 106 | * Tries to reuse free packets first. |
|
- | 107 | * Creates a new packet aligned to the memory page size if none available. |
|
- | 108 | * @param owner The new owner of the packet. Input parameter. |
|
- | 109 | * @param addr_len The source and destination addresses maximal length in bytes. Input parameter. |
|
- | 110 | * @param max_prefix The maximal prefix length in bytes. Input parameter. |
|
- | 111 | * @param max_content The maximal content length in bytes. Input parameter. |
|
- | 112 | * @param max_suffix The maximal suffix length in bytes. Input parameter. |
|
- | 113 | * @returns The packet of dimensions at least as given. |
|
- | 114 | * @returns NULL if there is not enough memory left. |
|
- | 115 | */ |
|
73 | packet_t packet_get( services_t owner, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_sufix ); |
116 | packet_t packet_get( services_t owner, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ); |
- | 117 | ||
- | 118 | /** Creates a new packet of dimensions at least as given. |
|
- | 119 | * @param length The total length of the packet, including the header, the addresses and the data of the packet. Input parameter. |
|
- | 120 | * @param owner The new owner of the packet. Input parameter. |
|
- | 121 | * @param addr_len The source and destination addresses maximal length in bytes. Input parameter. |
|
- | 122 | * @param max_prefix The maximal prefix length in bytes. Input parameter. |
|
- | 123 | * @param max_content The maximal content length in bytes. Input parameter. |
|
- | 124 | * @param max_suffix The maximal suffix length in bytes. Input parameter. |
|
- | 125 | * @returns The packet of dimensions at least as given. |
|
- | 126 | * @returns NULL if there is not enough memory left. |
|
- | 127 | */ |
|
74 | packet_t packet_create( size_t length, services_t owner, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_sufix ); |
128 | packet_t packet_create( size_t length, services_t owner, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ); |
- | 129 | ||
- | 130 | /** Initializes the packet according to the given dimensions. |
|
- | 131 | * @param packet The packet to be initialized. Input parameter. |
|
- | 132 | * @param owner The new owner of the packet. Input parameter. |
|
- | 133 | * @param addr_len The source and destination addresses maximal length in bytes. Input parameter. |
|
- | 134 | * @param max_prefix The maximal prefix length in bytes. Input parameter. |
|
- | 135 | * @param max_content The maximal content length in bytes. Input parameter. |
|
- | 136 | * @param max_suffix The maximal suffix length in bytes. Input parameter. |
|
- | 137 | */ |
|
75 | void packet_init( packet_t packet, services_t owner, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_sufix ); |
138 | void packet_init( packet_t packet, services_t owner, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ); |
- | 139 | ||
- | 140 | /** Shares the packet memory block. |
|
- | 141 | * @param packet The packet to be shared. |
|
- | 142 | * @returns EOK on success. |
|
- | 143 | * @returns EINVAL if the packet is not valid. |
|
- | 144 | * @returns EINVAL if the calling module does not accept the memory. |
|
- | 145 | * @returns ENOMEM if the desired and actual sizes differ. |
|
- | 146 | * @returns Other error codes as defined for the ipc_share_in_finalize() function. |
|
- | 147 | */ |
|
76 | int packet_reply( const packet_t packet ); |
148 | int packet_reply( const packet_t packet ); |
77 | 149 | ||
78 | int packet_server_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){ |
150 | int packet_server_message( ipc_callid_t callid, ipc_call_t * call, ipc_call_t * answer, int * answer_count ){ |
79 | packet_t packet; |
151 | packet_t packet; |
80 | 152 | ||
Line 120... | Line 192... | ||
120 | 192 | ||
121 | for( index = 0; ( index < FREE_QUEUES_COUNT - 1 ) && ( packet->length > ps_globals.sizes[ index ] ); ++ index ); |
193 | for( index = 0; ( index < FREE_QUEUES_COUNT - 1 ) && ( packet->length > ps_globals.sizes[ index ] ); ++ index ); |
122 | ps_globals.free[ index ] = pq_add( ps_globals.free[ index ], packet, packet->length, packet->length ); |
194 | ps_globals.free[ index ] = pq_add( ps_globals.free[ index ], packet, packet->length, packet->length ); |
123 | } |
195 | } |
124 | 196 | ||
125 | packet_t packet_get( services_t owner, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_sufix ){ |
197 | packet_t packet_get( services_t owner, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ){ |
126 | int index; |
198 | int index; |
127 | packet_t packet; |
199 | packet_t packet; |
128 | size_t length; |
200 | size_t length; |
129 | 201 | ||
130 | length = ALIGN_UP( sizeof( struct packet ) + 2 * addr_len + max_prefix + max_content + max_sufix, PAGE_SIZE ); |
202 | length = ALIGN_UP( sizeof( struct packet ) + 2 * addr_len + max_prefix + max_content + max_suffix, PAGE_SIZE ); |
131 | for( index = 0; index < FREE_QUEUES_COUNT - 1; ++ index ){ |
203 | for( index = 0; index < FREE_QUEUES_COUNT - 1; ++ index ){ |
132 | if( length <= ps_globals.sizes[ index ] ){ |
204 | if( length <= ps_globals.sizes[ index ] ){ |
133 | packet = ps_globals.free[ index ]; |
205 | packet = ps_globals.free[ index ]; |
134 | while( packet_is_valid( packet ) && ( packet->length < length )){ |
206 | while( packet_is_valid( packet ) && ( packet->length < length )){ |
135 | packet = pm_find( packet->next ); |
207 | packet = pm_find( packet->next ); |
136 | } |
208 | } |
137 | if( packet ){ |
209 | if( packet ){ |
138 | packet_init( packet, owner, addr_len, max_prefix, max_content, max_sufix ); |
210 | packet_init( packet, owner, addr_len, max_prefix, max_content, max_suffix ); |
139 | return packet; |
211 | return packet; |
140 | } |
212 | } |
141 | } |
213 | } |
142 | } |
214 | } |
143 | return packet_create( length, owner, addr_len, max_prefix, max_content, max_sufix ); |
215 | return packet_create( length, owner, addr_len, max_prefix, max_content, max_suffix ); |
144 | } |
216 | } |
145 | 217 | ||
146 | packet_t packet_create( size_t length, services_t owner, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_sufix ){ |
218 | packet_t packet_create( size_t length, services_t owner, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ){ |
147 | ERROR_DECLARE; |
219 | ERROR_DECLARE; |
148 | 220 | ||
149 | packet_t packet; |
221 | packet_t packet; |
150 | 222 | ||
151 | packet = ( packet_t ) mmap( NULL, length, PROTO_READ | PROTO_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0 ); |
223 | packet = ( packet_t ) mmap( NULL, length, PROTO_READ | PROTO_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0 ); |
152 | if( packet == MAP_FAILED ) return NULL; |
224 | if( packet == MAP_FAILED ) return NULL; |
153 | ++ ps_globals.count; |
225 | ++ ps_globals.count; |
154 | packet->packet_id = ps_globals.count; |
226 | packet->packet_id = ps_globals.count; |
155 | packet->mode = PM_ONEWAY; |
227 | packet->mode = PM_ONE_WAY; |
156 | packet->length = length; |
228 | packet->length = length; |
157 | packet_init( packet, owner, addr_len, max_prefix, max_content, max_sufix ); |
229 | packet_init( packet, owner, addr_len, max_prefix, max_content, max_suffix ); |
158 | packet->magic_value = PACKET_MAGIC_VALUE; |
230 | packet->magic_value = PACKET_MAGIC_VALUE; |
159 | if( ERROR_OCCURED( pm_add( packet ))){ |
231 | if( ERROR_OCCURRED( pm_add( packet ))){ |
160 | munmap( packet, packet->length ); |
232 | munmap( packet, packet->length ); |
161 | return NULL; |
233 | return NULL; |
162 | } |
234 | } |
163 | packet_release( packet ); |
235 | packet_release( packet ); |
164 | return packet; |
236 | return packet; |
165 | } |
237 | } |
166 | 238 | ||
167 | void packet_init( packet_t packet, services_t owner, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_sufix ){ |
239 | void packet_init( packet_t packet, services_t owner, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ){ |
168 | packet->owner = owner; |
240 | packet->owner = owner; |
169 | packet->order = 0; |
241 | packet->order = 0; |
170 | packet->metric = 0; |
242 | packet->metric = 0; |
171 | packet->previous = 0; |
243 | packet->previous = 0; |
172 | packet->next = 0; |
244 | packet->next = 0; |