WebSVN – HelenOS – Diff – //branches/network/uspace/srv/net/structures/packet/packet_server.c



#include <futex.h>
//#include <stdio.h>
#include <unistd.h>
 
#include <ipc/ipc.h>
 
#include <sys/mman.h>
 
#include "../../err.h"
#include "../../messages.h"
 

 
/** Returns the packet identifier message parameter.
 */
#define IPC_GET_ID( call )          ( packet_id_t ) IPC_GET_ARG1( * call )
 
 
 
 
 
/** Returns the maximal content length message parameter.
 */
#define IPC_GET_CONTENT( call )     ( size_t ) IPC_GET_ARG1( * call )
 
/** Returns the maximal address length message parameter.
 */
#define IPC_GET_ADDR_LEN( call )    ( size_t ) IPC_GET_ARG2( * call )
 
/** Returns the maximal prefix length message parameter.
 */
#define IPC_GET_PREFIX( call )      ( size_t ) IPC_GET_ARG3( * call )
 
/** Returns the maximal suffix length message parameter.
 */
#define IPC_GET_SUFIX( call )       ( size_t ) IPC_GET_ARG4( * call )
 
#define FREE_QUEUES_COUNT   7
 
/** Packet server global data.
 */

 
/** Returns the packet of dimensions at least as given.
 *  Tries to reuse free packets first.
 *  Creates a&nbsp;new packet aligned to the memory page size if none available.
 *  Locks the global data during its processing.
 
 *  @param addr_len The source and destination addresses maximal length in bytes. Input parameter.
 *  @param max_prefix The maximal prefix length in bytes. Input parameter.
 *  @param max_content The maximal content length in bytes. Input parameter.
 *  @param max_suffix The maximal suffix length in bytes. Input parameter.
 *  @returns The packet of dimensions at least as given.
 *  @returns NULL if there is not enough memory left.
 */
packet_t packet_get( size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix );
 
/** Creates a&nbsp;new packet of dimensions at least as given.
 *  Should be used only when the global data are locked.
 *  @param length The total length of the packet, including the header, the addresses and the data of the packet. Input parameter.
 
 *  @param addr_len The source and destination addresses maximal length in bytes. Input parameter.
 *  @param max_prefix The maximal prefix length in bytes. Input parameter.
 *  @param max_content The maximal content length in bytes. Input parameter.
 *  @param max_suffix The maximal suffix length in bytes. Input parameter.
 *  @returns The packet of dimensions at least as given.
 *  @returns NULL if there is not enough memory left.
 */
packet_t    packet_create( size_t length, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix );
 
/** Initializes the packet according to the given dimensions.
 *  @param packet The packet to be initialized. Input parameter.
 
 *  @param addr_len The source and destination addresses maximal length in bytes. Input parameter.
 *  @param max_prefix The maximal prefix length in bytes. Input parameter.
 *  @param max_content The maximal content length in bytes. Input parameter.
 *  @param max_suffix The maximal suffix length in bytes. Input parameter.
 */
void    packet_init( packet_t packet, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix );
 
/** Shares the packet memory block.
 *  @param packet The packet to be shared.
 *  @returns EOK on success.
 *  @returns EINVAL if the packet is not valid.

    * answer_count = 0;
    switch( IPC_GET_METHOD( * call )){
        case IPC_M_PHONE_HUNGUP:
            return EOK;
        case NET_PACKET_CREATE_1:
            packet = packet_get( 0, 0, IPC_GET_CONTENT( call ), 0 );
            if( ! packet ) return ENOMEM;
            * answer_count = 2;
            IPC_SET_ARG1( * answer, packet->packet_id );
            IPC_SET_ARG2( * answer, packet->length );
            return EOK;
        case NET_PACKET_CREATE_4:
            packet = packet_get( IPC_GET_ADDR_LEN( call ), IPC_GET_PREFIX( call ), IPC_GET_CONTENT( call ), IPC_GET_SUFIX( call ));
            if( ! packet ) return ENOMEM;
            * answer_count = 2;
            IPC_SET_ARG1( * answer, packet->packet_id );
            IPC_SET_ARG2( * answer, packet->length );
            return EOK;

 
    for( index = 0; ( index < FREE_QUEUES_COUNT - 1 ) && ( packet->length > ps_globals.sizes[ index ] ); ++ index );
    ps_globals.free[ index ] = pq_add( ps_globals.free[ index ], packet, packet->length, packet->length );
}
 
packet_t packet_get( size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ){
    int index;
    packet_t packet;
    size_t length;
 
    length = ALIGN_UP( sizeof( struct packet ) + 2 * addr_len + max_prefix + max_content + max_suffix, PAGE_SIZE );

            packet = ps_globals.free[ index ];
            while( packet_is_valid( packet ) && ( packet->length < length )){
                packet = pm_find( packet->next );
            }
            if( packet ){
                packet_init( packet, addr_len, max_prefix, max_content, max_suffix );
                futex_up( & ps_globals.lock );
                return packet;
            }
        }
    }
    packet = packet_create( length, addr_len, max_prefix, max_content, max_suffix );
    futex_up( & ps_globals.lock );
    return packet;
}
 
packet_t packet_create( size_t length, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ){
    ERROR_DECLARE;
 
    packet_t    packet;
 
    // already locked
    packet = ( packet_t ) mmap( NULL, length, PROTO_READ | PROTO_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0 );
    if( packet == MAP_FAILED ) return NULL;
    ++ ps_globals.count;
    packet->packet_id = ps_globals.count;
 
    packet->length = length;
    packet_init( packet, addr_len, max_prefix, max_content, max_suffix );
    packet->magic_value = PACKET_MAGIC_VALUE;
    if( ERROR_OCCURRED( pm_add( packet ))){
        munmap( packet, packet->length );
        return NULL;
    }
    packet_release( packet );
    return packet;
}
 
void packet_init( packet_t packet, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ){
 
    packet->order = 0;
    packet->metric = 0;
    packet->previous = 0;
    packet->next = 0;
    packet->addr_len = addr_len;

Rev 3914	Rev 3990
Line 40...	Line 40...
40	#include <futex.h>	40	#include <futex.h>
41	//#include <stdio.h>	41	//#include <stdio.h>
42	#include <unistd.h>	42	#include <unistd.h>
43		43
44	#include <ipc/ipc.h>	44	#include <ipc/ipc.h>
45	#include <ipc/services.h>	-
46	#include <sys/mman.h>	45	#include <sys/mman.h>
47		46
48	#include "../../err.h"	47	#include "../../err.h"
49	#include "../../messages.h"	48	#include "../../messages.h"
50		49
Line 54...	Line 53...
54		53
55	/** Returns the packet identifier message parameter.	54	/** Returns the packet identifier message parameter.
56	*/	55	*/
57	#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 )
58		57
59	/** Returns the owner message parameter.	-
60	*/	-
61	#define IPC_GET_OWNER( call ) ( services_t ) IPC_GET_ARG1( * call )	-
62		-
63	/** Returns the maximal content length message parameter.	58	/** Returns the maximal content length message parameter.
64	*/	59	*/
65	#define IPC_GET_CONTENT( call ) ( size_t ) IPC_GET_ARG2( * call )	60	#define IPC_GET_CONTENT( call ) ( size_t ) IPC_GET_ARG1( * call )
66		61
67	/** Returns the maximal address length message parameter.	62	/** Returns the maximal address length message parameter.
68	*/	63	*/
69	#define IPC_GET_ADDR_LEN( call ) ( size_t ) IPC_GET_ARG3( * call )	64	#define IPC_GET_ADDR_LEN( call ) ( size_t ) IPC_GET_ARG2( * call )
70		65
71	/** Returns the maximal prefix length message parameter.	66	/** Returns the maximal prefix length message parameter.
72	*/	67	*/
73	#define IPC_GET_PREFIX( call ) ( size_t ) IPC_GET_ARG4( * call )	68	#define IPC_GET_PREFIX( call ) ( size_t ) IPC_GET_ARG3( * call )
74		69
75	/** Returns the maximal suffix length message parameter.	70	/** Returns the maximal suffix length message parameter.
76	*/	71	*/
77	#define IPC_GET_SUFIX( call ) ( size_t ) IPC_GET_ARG5( * call )	72	#define IPC_GET_SUFIX( call ) ( size_t ) IPC_GET_ARG4( * call )
78		73
79	#define FREE_QUEUES_COUNT 7	74	#define FREE_QUEUES_COUNT 7
80		75
81	/** Packet server global data.	76	/** Packet server global data.
82	*/	77	*/
Line 110...	Line 105...
110		105
111	/** Returns the packet of dimensions at least as given.	106	/** Returns the packet of dimensions at least as given.
112	* Tries to reuse free packets first.	107	* Tries to reuse free packets first.
113	* Creates a new packet aligned to the memory page size if none available.	108	* Creates a new packet aligned to the memory page size if none available.
114	* Locks the global data during its processing.	109	* Locks the global data during its processing.
115	* @param owner The new owner of the packet. Input parameter.	-
116	* @param addr_len The source and destination addresses maximal length in bytes. Input parameter.	110	* @param addr_len The source and destination addresses maximal length in bytes. Input parameter.
117	* @param max_prefix The maximal prefix length in bytes. Input parameter.	111	* @param max_prefix The maximal prefix length in bytes. Input parameter.
118	* @param max_content The maximal content length in bytes. Input parameter.	112	* @param max_content The maximal content length in bytes. Input parameter.
119	* @param max_suffix The maximal suffix length in bytes. Input parameter.	113	* @param max_suffix The maximal suffix length in bytes. Input parameter.
120	* @returns The packet of dimensions at least as given.	114	* @returns The packet of dimensions at least as given.
121	* @returns NULL if there is not enough memory left.	115	* @returns NULL if there is not enough memory left.
122	*/	116	*/
123	packet_t packet_get( services_t owner, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix );	117	packet_t packet_get( size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix );
124		118
125	/** Creates a new packet of dimensions at least as given.	119	/** Creates a new packet of dimensions at least as given.
126	* Should be used only when the global data are locked.	120	* Should be used only when the global data are locked.
127	* @param length The total length of the packet, including the header, the addresses and the data of the packet. Input parameter.	121	* @param length The total length of the packet, including the header, the addresses and the data of the packet. Input parameter.
128	* @param owner The new owner of the packet. Input parameter.	-
129	* @param addr_len The source and destination addresses maximal length in bytes. Input parameter.	122	* @param addr_len The source and destination addresses maximal length in bytes. Input parameter.
130	* @param max_prefix The maximal prefix length in bytes. Input parameter.	123	* @param max_prefix The maximal prefix length in bytes. Input parameter.
131	* @param max_content The maximal content length in bytes. Input parameter.	124	* @param max_content The maximal content length in bytes. Input parameter.
132	* @param max_suffix The maximal suffix length in bytes. Input parameter.	125	* @param max_suffix The maximal suffix length in bytes. Input parameter.
133	* @returns The packet of dimensions at least as given.	126	* @returns The packet of dimensions at least as given.
134	* @returns NULL if there is not enough memory left.	127	* @returns NULL if there is not enough memory left.
135	*/	128	*/
136	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	packet_t packet_create( size_t length, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix );
137		130
138	/** Initializes the packet according to the given dimensions.	131	/** Initializes the packet according to the given dimensions.
139	* @param packet The packet to be initialized. Input parameter.	132	* @param packet The packet to be initialized. Input parameter.
140	* @param owner The new owner of the packet. Input parameter.	-
141	* @param addr_len The source and destination addresses maximal length in bytes. Input parameter.	133	* @param addr_len The source and destination addresses maximal length in bytes. Input parameter.
142	* @param max_prefix The maximal prefix length in bytes. Input parameter.	134	* @param max_prefix The maximal prefix length in bytes. Input parameter.
143	* @param max_content The maximal content length in bytes. Input parameter.	135	* @param max_content The maximal content length in bytes. Input parameter.
144	* @param max_suffix The maximal suffix length in bytes. Input parameter.	136	* @param max_suffix The maximal suffix length in bytes. Input parameter.
145	*/	137	*/
146	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 );	138	void packet_init( packet_t packet, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix );
147		139
148	/** Shares the packet memory block.	140	/** Shares the packet memory block.
149	* @param packet The packet to be shared.	141	* @param packet The packet to be shared.
150	* @returns EOK on success.	142	* @returns EOK on success.
151	* @returns EINVAL if the packet is not valid.	143	* @returns EINVAL if the packet is not valid.
Line 161...	Line 153...
161	* answer_count = 0;	153	* answer_count = 0;
162	switch( IPC_GET_METHOD( * call )){	154	switch( IPC_GET_METHOD( * call )){
163	case IPC_M_PHONE_HUNGUP:	155	case IPC_M_PHONE_HUNGUP:
164	return EOK;	156	return EOK;
165	case NET_PACKET_CREATE_1:	157	case NET_PACKET_CREATE_1:
166	packet = packet_get( IPC_GET_OWNER( call ), 0, 0, IPC_GET_CONTENT( call ), 0 );	158	packet = packet_get( 0, 0, IPC_GET_CONTENT( call ), 0 );
167	if( ! packet ) return ENOMEM;	159	if( ! packet ) return ENOMEM;
168	* answer_count = 2;	160	* answer_count = 2;
169	IPC_SET_ARG1( * answer, packet->packet_id );	161	IPC_SET_ARG1( * answer, packet->packet_id );
170	IPC_SET_ARG2( * answer, packet->length );	162	IPC_SET_ARG2( * answer, packet->length );
171	return EOK;	163	return EOK;
172	case NET_PACKET_CREATE_5:	164	case NET_PACKET_CREATE_4:
173	packet = packet_get( IPC_GET_OWNER( call ), IPC_GET_ADDR_LEN( call ), IPC_GET_PREFIX( call ), IPC_GET_CONTENT( call ), IPC_GET_SUFIX( call ));	165	packet = packet_get( IPC_GET_ADDR_LEN( call ), IPC_GET_PREFIX( call ), IPC_GET_CONTENT( call ), IPC_GET_SUFIX( call ));
174	if( ! packet ) return ENOMEM;	166	if( ! packet ) return ENOMEM;
175	* answer_count = 2;	167	* answer_count = 2;
176	IPC_SET_ARG1( * answer, packet->packet_id );	168	IPC_SET_ARG1( * answer, packet->packet_id );
177	IPC_SET_ARG2( * answer, packet->length );	169	IPC_SET_ARG2( * answer, packet->length );
178	return EOK;	170	return EOK;
Line 202...	Line 194...
202		194
203	for( index = 0; ( index < FREE_QUEUES_COUNT - 1 ) && ( packet->length > ps_globals.sizes[ index ] ); ++ index );	195	for( index = 0; ( index < FREE_QUEUES_COUNT - 1 ) && ( packet->length > ps_globals.sizes[ index ] ); ++ index );
204	ps_globals.free[ index ] = pq_add( ps_globals.free[ index ], packet, packet->length, packet->length );	196	ps_globals.free[ index ] = pq_add( ps_globals.free[ index ], packet, packet->length, packet->length );
205	}	197	}
206		198
207	packet_t packet_get( services_t owner, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ){	199	packet_t packet_get( size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ){
208	int index;	200	int index;
209	packet_t packet;	201	packet_t packet;
210	size_t length;	202	size_t length;
211		203
212	length = ALIGN_UP( sizeof( struct packet ) + 2 * addr_len + max_prefix + max_content + max_suffix, PAGE_SIZE );	204	length = ALIGN_UP( sizeof( struct packet ) + 2 * addr_len + max_prefix + max_content + max_suffix, PAGE_SIZE );
Line 216...	Line 208...
216	packet = ps_globals.free[ index ];	208	packet = ps_globals.free[ index ];
217	while( packet_is_valid( packet ) && ( packet->length < length )){	209	while( packet_is_valid( packet ) && ( packet->length < length )){
218	packet = pm_find( packet->next );	210	packet = pm_find( packet->next );
219	}	211	}
220	if( packet ){	212	if( packet ){
221	packet_init( packet, owner, addr_len, max_prefix, max_content, max_suffix );	213	packet_init( packet, addr_len, max_prefix, max_content, max_suffix );
222	futex_up( & ps_globals.lock );	214	futex_up( & ps_globals.lock );
223	return packet;	215	return packet;
224	}	216	}
225	}	217	}
226	}	218	}
227	packet = packet_create( length, owner, addr_len, max_prefix, max_content, max_suffix );	219	packet = packet_create( length, addr_len, max_prefix, max_content, max_suffix );
228	futex_up( & ps_globals.lock );	220	futex_up( & ps_globals.lock );
229	return packet;	221	return packet;
230	}	222	}
231		223
232	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 ){	224	packet_t packet_create( size_t length, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ){
233	ERROR_DECLARE;	225	ERROR_DECLARE;
234		226
235	packet_t packet;	227	packet_t packet;
236		228
237	// already locked	229	// already locked
238	packet = ( packet_t ) mmap( NULL, length, PROTO_READ \| PROTO_WRITE, MAP_SHARED \| MAP_ANONYMOUS, 0, 0 );	230	packet = ( packet_t ) mmap( NULL, length, PROTO_READ \| PROTO_WRITE, MAP_SHARED \| MAP_ANONYMOUS, 0, 0 );
239	if( packet == MAP_FAILED ) return NULL;	231	if( packet == MAP_FAILED ) return NULL;
240	++ ps_globals.count;	232	++ ps_globals.count;
241	packet->packet_id = ps_globals.count;	233	packet->packet_id = ps_globals.count;
242	packet->mode = PM_ONE_WAY;	-
243	packet->length = length;	234	packet->length = length;
244	packet_init( packet, owner, addr_len, max_prefix, max_content, max_suffix );	235	packet_init( packet, addr_len, max_prefix, max_content, max_suffix );
245	packet->magic_value = PACKET_MAGIC_VALUE;	236	packet->magic_value = PACKET_MAGIC_VALUE;
246	if( ERROR_OCCURRED( pm_add( packet ))){	237	if( ERROR_OCCURRED( pm_add( packet ))){
247	munmap( packet, packet->length );	238	munmap( packet, packet->length );
248	return NULL;	239	return NULL;
249	}	240	}
250	packet_release( packet );	241	packet_release( packet );
251	return packet;	242	return packet;
252	}	243	}
253		244
254	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 ){	245	void packet_init( packet_t packet, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ){
255	packet->owner = owner;	-
256	packet->order = 0;	246	packet->order = 0;
257	packet->metric = 0;	247	packet->metric = 0;
258	packet->previous = 0;	248	packet->previous = 0;
259	packet->next = 0;	249	packet->next = 0;
260	packet->addr_len = addr_len;	250	packet->addr_len = addr_len;

Subversion Repositories HelenOS

(root)//branches/network/uspace/srv/net/structures/packet/packet_server.c – Rev 3914 → 3990