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source: trunk/kernel/kern/rpc.h @ 583

Last change on this file since 583 was 583, checked in by alain, 5 years ago
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[1]	1	/*
	2	* rpc.h - RPC (Remote Procedure Call) operations definition.
	3	*
[437]	4	* Author Alain Greiner (2016,2017,2018)
[1]	5	*
	6	* Copyright (c) UPMC Sorbonne Universites
	7	*
	8	* This file is part of ALMOS-MKH.
	9	*
	10	* ALMOS-MKH is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; version 2.0 of the License.
	13	*
	14	* ALMOS-MKH is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with ALMOS-MKH; if not, write to the Free Software Foundation,
	21	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	22	*/
	23
	24	#ifndef _RPC_H_
	25	#define _RPC_H_
	26
[14]	27	#include <kernel_config.h>
[457]	28	#include <hal_kernel_types.h>
[1]	29	#include <hal_atomic.h>
	30	#include <bits.h>
[407]	31	#include <vseg.h>
[1]	32	#include <remote_fifo.h>
	33
	34	/** Forward declarations **/
	35
	36	struct process_s;
[313]	37	struct page_s;
[1]	38	struct vseg_s;
	39	struct exec_info_s;
	40	struct pthread_attr_s;
	41	struct remote_sem_s;
	42	struct fragment_s;
	43	struct vfs_inode_s;
	44	struct vfs_dentry_s;
[23]	45	struct vfs_file_s;
[1]	46	struct thread_s;
	47	struct mapper_s;
	48
[436]	49
[1]	50	/**********************************************************************************/
	51	/************ structures for Remote Procedure Calls **************************/
	52	/**********************************************************************************/
	53
	54	/***********************************************************************************
	55	* This enum defines all RPC indexes.
	56	* It must be consistent with the rpc_server[] array defined in in the rpc.c file.
	57	**********************************************************************************/
	58
	59	typedef enum
	60	{
	61	RPC_PMEM_GET_PAGES = 0,
[409]	62	RPC_PMEM_RELEASE_PAGES = 1,
[433]	63	RPC_UNDEFINED_2 = 2,
[409]	64	RPC_PROCESS_MAKE_FORK = 3,
[433]	65	RPC_UNDEFINED_4 = 4,
[435]	66	RPC_UNDEFINED_5 = 5,
[409]	67	RPC_THREAD_USER_CREATE = 6,
	68	RPC_THREAD_KERNEL_CREATE = 7,
[436]	69	RPC_UNDEFINED_8 = 8,
[409]	70	RPC_PROCESS_SIGACTION = 9,
[1]	71
	72	RPC_VFS_INODE_CREATE = 10,
	73	RPC_VFS_INODE_DESTROY = 11,
	74	RPC_VFS_DENTRY_CREATE = 12,
	75	RPC_VFS_DENTRY_DESTROY = 13,
[23]	76	RPC_VFS_FILE_CREATE = 14,
	77	RPC_VFS_FILE_DESTROY = 15,
[238]	78	RPC_VFS_INODE_LOAD = 16,
	79	RPC_VFS_MAPPER_LOAD_ALL = 17,
	80	RPC_FATFS_GET_CLUSTER = 18,
[433]	81	RPC_UNDEFINED_19 = 19,
[1]	82
[389]	83	RPC_VMM_GET_VSEG = 20,
[583]	84	RPC_VMM_GLOBAL_UPDATE_PTE = 21,
[23]	85	RPC_KCM_ALLOC = 22,
	86	RPC_KCM_FREE = 23,
[265]	87	RPC_MAPPER_MOVE_BUFFER = 24,
[313]	88	RPC_MAPPER_GET_PAGE = 25,
[407]	89	RPC_VMM_CREATE_VSEG = 26,
[450]	90	RPC_UNDEFINED_27 = 27,
[408]	91	RPC_VMM_SET_COW = 28,
[428]	92	RPC_VMM_DISPLAY = 29,
[409]	93
[23]	94	RPC_MAX_INDEX = 30,
[1]	95	}
	96	rpc_index_t;
	97
	98	/***********************************************************************************
	99	* This defines the prototype of the rpc_server functions,
	100	* defined by the rpc_server[] array in the rpc.c file.
	101	**********************************************************************************/
	102
	103	typedef void (rpc_server_t) ( xptr_t xp );
	104
	105	/***********************************************************************************
	106	* This structure defines the RPC descriptor
	107	**********************************************************************************/
	108
	109	typedef struct rpc_desc_s
	110	{
[407]	111	rpc_index_t index; /! index of requested RPC service /
[438]	112	volatile uint32_t responses; /! number of expected responses /
[407]	113	struct thread_s * thread; /! local pointer on client thread /
	114	uint32_t lid; /! index of core running the calling thread /
[416]	115	bool_t blocking; /! blocking RPC when true /
[407]	116	uint64_t args[10]; /! input/output arguments buffer /
[1]	117	}
	118	rpc_desc_t;
	119
	120	/**********************************************************************************/
	121	/***** Generic functions supporting RPCs : client side ************************/
	122	/**********************************************************************************/
	123
	124	/***********************************************************************************
[409]	125	* This function is executed by the client thread in the client cluster.
	126	* It puts one RPC descriptor defined by the <desc> argument in the remote fifo
	127	* defined by the <cxy> argument. It sends an IPI to the server if fifo is empty.
	128	* The RPC descriptor must be allocated in the caller's stack, and initialised by
	129	* the caller. It exit with a Panic message if remote fifo is still full after
	130	* (CONFIG_RPC_PUT_MAX_ITERATIONS) retries.
[416]	131	* - When the RPC <blocking> field is true, this function blocks and deschedule.
[409]	132	* It returns only when the server acknowledges the RPC by writing in the RPC
	133	* "response" field, and unblocks the client.
[416]	134	* - When the <blocking> field is false, this function returns as soon as the RPC
[409]	135	* has been registered in the FIFO, and the server thread must directly signal
	136	* completion to the client thread.
[1]	137	***********************************************************************************
	138	* @ cxy : server cluster identifier
	139	* @ desc : local pointer on RPC descriptor in client cluster
	140	**********************************************************************************/
[409]	141	void rpc_send( cxy_t cxy,
[416]	142	rpc_desc_t * desc );
[1]	143
	144
	145
	146	/**********************************************************************************/
	147	/***** Generic functions supporting RPCs : server side ************************/
	148	/**********************************************************************************/
	149
	150	/***********************************************************************************
[583]	151	* This function contains the infinite loop executed by a RPC server thread,
	152	* to handle pending RPCs registered in the RPC fifo attached to a given core.
	153	* In each iteration in this loop, it try to handle one RPC request:
	154	* - it tries to take the RPC FIFO ownership,
	155	* - it consumes one request when the FIFO is not empty,
	156	* - it releases the FIFO ownership,
	157	* - it execute the requested service,
	158	* - it unblock and send an IPI to the client thread,
	159	* - it suicides if the number of RPC threads for this core is to large,
	160	* - it block on IDLE and deschedule otherwise.
[1]	161	**********************************************************************************/
[485]	162	void rpc_thread_func( void );
[1]	163
	164	/***********************************************************************************
	165	* This function is executed in case of illegal RPC index.
	166	**********************************************************************************/
[503]	167	void __attribute__((noinline)) rpc_undefined( xptr_t xp __attribute__ ((unused)) );
[1]	168
[23]	169
	170
[1]	171	/**********************************************************************************/
	172	/***** Marshalling functions attached to the various RPCs *********************/
	173	/**********************************************************************************/
	174
	175	/***********************************************************************************
[23]	176	* [0] The RPC_PMEM_GET_PAGES allocates one or several pages in a remote cluster,
[313]	177	* and returns the local pointer on the page descriptor.
[1]	178	***********************************************************************************
	179	* @ cxy : server cluster identifier
	180	* @ order : [in] ln2( number of requested pages )
[313]	181	* @ page : [out] local pointer on page descriptor / NULL if failure
[1]	182	**********************************************************************************/
[313]	183	void rpc_pmem_get_pages_client( cxy_t cxy,
	184	uint32_t order,
	185	struct page_s ** page );
[1]	186
	187	void rpc_pmem_get_pages_server( xptr_t xp );
	188
	189	/***********************************************************************************
[409]	190	* [1] The RPC_PMEM_RELEASE_PAGES release one or several pages to a remote cluster.
	191	***********************************************************************************
	192	* @ cxy : server cluster identifier
	193	* @ page : [in] local pointer on page descriptor to release.
	194	**********************************************************************************/
	195	void rpc_pmem_release_pages_client( cxy_t cxy,
	196	struct page_s * page );
	197
	198	void rpc_pmem_release_pages_server( xptr_t xp );
	199
	200	/***********************************************************************************
[433]	201	* [2] undefined slot
[1]	202	**********************************************************************************/
	203
	204	/***********************************************************************************
[409]	205	* [3] The RPC_PROCESS_MAKE_FORK creates a "child" process descriptor, and the
[408]	206	* associated "child" thread descriptor in a target remote cluster that can be
	207	* any cluster. The child process is initialized from informations found in the
	208	* "parent" process descriptor (that must be the parent reference cluster),
	209	* and from the "parent" thread descriptor that can be in any cluster.
[1]	210	***********************************************************************************
[408]	211	* @ cxy : server cluster identifier.
	212	* @ ref_process_xp : [in] extended pointer on reference parent process.
	213	* @ parent_thread_xp : [in] extended pointer on parent thread.
	214	* @ child_pid : [out] child process identifier.
	215	* @ child_thread_ptr : [out] local pointer on child thread.
	216	* @ error : [out] error status (0 if success).
[1]	217	**********************************************************************************/
[408]	218	void rpc_process_make_fork_client( cxy_t cxy,
	219	xptr_t ref_process_xp,
	220	xptr_t parent_thread_xp,
	221	pid_t * child_pid,
	222	struct thread_s ** child_thread_ptr,
	223	error_t * error );
[1]	224
[408]	225	void rpc_process_make_fork_server( xptr_t xp );
[1]	226
	227	/***********************************************************************************
[433]	228	* [4] undefined slot
[1]	229	**********************************************************************************/
	230
	231	/***********************************************************************************
[435]	232	* [5] undefined slot
[409]	233	**********************************************************************************/
	234
	235	/***********************************************************************************
	236	* [6] The RPC_THREAD_USER_CREATE creates an user thread in the server cluster,
[23]	237	* as specified by the arguments. It returns an extended pointer on the new
	238	* thread descriptor in server cluster, and an error code.
	239	* It is called by the sys_thread_create() system call.
[1]	240	***********************************************************************************
	241	* @ cxy : server cluster identifier.
[407]	242	* @ attr : [in] local pointer on pthread_attr_t in client cluster.
	243	* @ thread_xp : [out] buffer for thread extended pointer.
[1]	244	* @ error : [out] error status (0 if success).
	245	**********************************************************************************/
	246	void rpc_thread_user_create_client( cxy_t cxy,
[23]	247	pid_t pid,
	248	void * start_func,
	249	void * start_arg,
[407]	250	pthread_attr_t * attr,
[1]	251	xptr_t * thread_xp,
	252	error_t * error );
	253
	254	void rpc_thread_user_create_server( xptr_t xp );
	255
	256	/***********************************************************************************
[409]	257	* [7] The RPC_THREAD_KERNEL_CREATE creates a kernel thread in the server cluster,
[1]	258	* as specified by the type, func and args arguments. It returns the local pointer
	259	* on the thread descriptor in server cluster and an error code.
[23]	260	* It is used by the dev_init() function to create the device server thread.
[1]	261	***********************************************************************************
	262	* @ cxy : server cluster identifier.
	263	* @ type : [in] type of kernel thread.
	264	* @ func : [in] local pointer on thread function.
	265	* @ args : [in] local pointer on function arguments.
	266	* @ thread_xp : [out] pointer on buffer for thread extended pointer.
	267	* @ error : [out] error status (0 if success).
	268	**********************************************************************************/
	269	void rpc_thread_kernel_create_client( cxy_t cxy,
	270	uint32_t type,
	271	void * func,
	272	void * args,
	273	xptr_t * thread_xp,
	274	error_t * error );
	275
	276	void rpc_thread_kernel_create_server( xptr_t xp );
	277
[23]	278	/***********************************************************************************
[436]	279	* [8] undefined slot
[23]	280	**********************************************************************************/
	281
[409]	282	/***********************************************************************************
[436]	283	* [9] The RPC_PROCESS_SIGACTION allows a thread running in any cluster
	284	* to request a cluster identified by the <cxy> argument (local or remote)
	285	* to execute a given sigaction for a given cluster. The <action_type> and
	286	* the <pid> arguments are defined in the shared RPC descriptor, that must be
	287	* initialised by the client thread.
[409]	288	*
	289	* WARNING : It is implemented as a NON BLOCKING multicast RPC, that can be sent
[436]	290	* in parallel to all process copies. The various RPC server threads atomically
	291	* decrement the <response> field in the shared RPC descriptor.
	292	* The last server thread unblock the client thread that blocked (after sending
	293	* all RPC requests) in the process_sigaction() function.
[409]	294	***********************************************************************************
[436]	295	* @ cxy : server cluster identifier.
	296	* @ rpc : pointer on ishared RPC descriptor initialized by the client thread.
[409]	297	**********************************************************************************/
[436]	298	void rpc_process_sigaction_client( cxy_t cxy,
	299	struct rpc_desc_s * rpc );
[409]	300
	301	void rpc_process_sigaction_server( xptr_t xp );
	302
[1]	303	/***********************************************************************************
[23]	304	* [10] The RPC_VFS_INODE_CREATE creates an inode and the associated mapper in a
[1]	305	* remote cluster. The parent dentry must have been previously created.
	306	* It returns an extended pointer on the created inode.
	307	***********************************************************************************
[23]	308	* @ cxy : server cluster identifier.
	309	* @ dentry_xp : [in] extended pointer on parent dentry.
	310	* @ fs_type : [in] file system type.
	311	* @ inode_type : [in] file system type.
[188]	312	* @ extend : [in] fs_type_specific inode extension.
[23]	313	* @ attr : [in] inode attributes.
	314	* @ rights : [in] access rights
	315	* @ uid : [in] user ID
	316	* @ gid : [in] group ID
	317	* @ inode_xp : [out] buffer for extended pointer on created inode.
	318	* @ error : [out] error status (0 if success).
[1]	319	**********************************************************************************/
	320	void rpc_vfs_inode_create_client( cxy_t cxy,
	321	xptr_t dentry_xp,
[23]	322	uint32_t fs_type,
	323	uint32_t inode_type,
[188]	324	void * extend,
[1]	325	uint32_t attr,
[23]	326	uint32_t rights,
[1]	327	uint32_t uid,
	328	uint32_t gid,
	329	xptr_t * inode_xp,
	330	error_t * error );
	331
	332	void rpc_vfs_inode_create_server( xptr_t xp );
	333
	334	/***********************************************************************************
[23]	335	* [11] The RPC_VFS_INODE_DESTROY releases memory allocated for an inode descriptor
[1]	336	* and for the associated mapper in a remote cluster.
	337	***********************************************************************************
	338	* @ cxy : server cluster identifier
	339	* @ inode : [in] local pointer on inode.
[459]	340	* @ error : [out] error status (0 if success).
[1]	341	**********************************************************************************/
	342	void rpc_vfs_inode_destroy_client( cxy_t cxy,
[459]	343	struct vfs_inode_s * inode,
	344	error_t * error );
[1]	345
	346	void rpc_vfs_inode_destroy_server( xptr_t xp );
	347
	348	/***********************************************************************************
[23]	349	* [12] The RPC_VFS_DENTRY_CREATE creates a dentry in a remote cluster.
[1]	350	* It returns an extended pointer on the created dentry.
	351	***********************************************************************************
	352	* @ cxy : server cluster identifier
	353	* @ type : [in] file system type.
	354	* @ name : [in] directory entry name.
	355	* @ parent : [in] local pointer on parent inode.
	356	* @ dentry_xp : [out] buffer for extended pointer on created dentry.
	357	* @ error : [out] error status (0 if success).
	358	**********************************************************************************/
	359	void rpc_vfs_dentry_create_client( cxy_t cxy,
	360	uint32_t type,
	361	char * name,
	362	struct vfs_inode_s * parent,
	363	xptr_t * dentry_xp,
	364	error_t * error );
	365
	366	void rpc_vfs_dentry_create_server( xptr_t xp );
	367
	368	/***********************************************************************************
[459]	369	* [13] The RPC_VFS_DENTRY_DESTROY remove a denfry from the parent inode XHTAB,
	370	* and releases memory allocated for the dentry descriptor in a remote cluster.
[1]	371	***********************************************************************************
	372	* @ cxy : server cluster identifier
	373	* @ dentry : [in] local pointer on dentry.
[459]	374	* @ error : [out] error status (0 if success).
[1]	375	**********************************************************************************/
	376	void rpc_vfs_dentry_destroy_client( cxy_t cxy,
[459]	377	struct vfs_dentry_s * dentry,
	378	error_t * error );
[1]	379
	380	void rpc_vfs_dentry_destroy_server( xptr_t xp );
	381
[23]	382	/***********************************************************************************
	383	* [14] The RPC_VFS_FILE_CREATE creates a file descriptor in a remote cluster.
	384	* It returns an extended pointer on the created file structure.
	385	***********************************************************************************
	386	* @ cxy : server cluster identifier
	387	* @ inode : [in] local pointer on parent inode.
	388	* @ file_attr : [in] new file attributes.
	389	* @ file_xp : [out] buffer for extended pointer on created file.
	390	* @ error : [out] error status (0 if success).
	391	**********************************************************************************/
	392	void rpc_vfs_file_create_client( cxy_t cxy,
	393	struct vfs_inode_s * inode,
	394	uint32_t file_attr,
	395	xptr_t * file_xp,
	396	error_t * error );
[1]	397
[23]	398	void rpc_vfs_file_create_server( xptr_t xp );
[1]	399
[23]	400	/***********************************************************************************
	401	* [15] The RPC_VFS_FILE_DESTROY releases memory allocated for a file descriptor
	402	* in a remote cluster.
	403	***********************************************************************************
	404	* @ cxy : server cluster identifier
	405	* @ file : [in] local pointer on file.
	406	**********************************************************************************/
	407	void rpc_vfs_file_destroy_client( cxy_t cxy,
	408	struct vfs_file_s * file );
[1]	409
[23]	410	void rpc_vfs_file_destroy_server( xptr_t xp );
	411
[238]	412	/***********************************************************************************
	413	* [16] The RPC_VFS_LOAD_INODE calls the vfs_inode_load() kernel function in a
	414	* remote cluster containing a parent inode directory to scan the associated
	415	* mapper, find a directory entry, identified by its name, and update the remote
	416	* child inode.
	417	***********************************************************************************
	418	* @ cxy : server cluster identifier
	419	* @ parent_inode : [in] local pointer on parent inode.
	420	* @ name : [in] local pointer on child name (in client cluster).
	421	* @ child_inode_xp : [in] extended pointer on child inode (in another cluster).
	422	* @ error : [out] error status (0 if success).
	423	**********************************************************************************/
	424	void rpc_vfs_inode_load_client( cxy_t cxy,
	425	struct vfs_inode_s * parent_inode,
	426	char * name,
	427	xptr_t child_inode_xp,
	428	error_t * error );
	429
	430	void rpc_vfs_inode_load_server( xptr_t xp );
	431
	432	/***********************************************************************************
	433	* [17] The RPC_VFS_MAPPER_LOAD_ALL calls the vfs_mapper_load_all() kernel function
	434	* in a remote cluster containing an inode, to load all pages of the associated
	435	* mapper from the file system on device.
	436	***********************************************************************************
	437	* @ cxy : server cluster identifier
	438	* @ inode : [in] local pointer on inode in server cluster.
	439	* @ error : [out] error status (0 if success).
	440	**********************************************************************************/
	441	void rpc_vfs_mapper_load_all_client( cxy_t cxy,
	442	struct vfs_inode_s * inode,
	443	error_t * error );
	444
	445	void rpc_vfs_mapper_load_all_server( xptr_t xp );
	446
[1]	447	/***********************************************************************************
[238]	448	* [18] The RPC_FATFS_GET_CLUSTER can be send by any thread running in a "client"
[23]	449	* cluster to scan the FAT mapper, stored in a remote "server" cluster, and get
	450	* from the mapper the local pointer on a given page.
	451	***********************************************************************************
	452	* @ cxy : server cluster identifier.
	453	* @ mapper : [in] local pointer on FAT mapper.
	454	* @ first : [in] FATFS cluster index allocated to first page of file.
	455	* @ page : [in] page index in file.
	456	* @ cluster : [out] local pointer on buffer for found FATFS cluster index.
	457	* @ error : [out] local pointer on buffer for error code (in client cluster).
	458	**********************************************************************************/
	459	void rpc_fatfs_get_cluster_client( cxy_t cxy,
	460	struct mapper_s * mapper,
	461	uint32_t first,
	462	uint32_t page,
	463	uint32_t * cluster,
	464	error_t * error );
	465
	466	void rpc_fatfs_get_cluster_server( xptr_t xp );
	467
	468	/***********************************************************************************
[433]	469	* [19] undefined slot
	470	**********************************************************************************/
	471
	472	/***********************************************************************************
[389]	473	* [20] The RPC_VMM_GET_VSEG returns an extended pointer
[1]	474	* on the vseg containing a given virtual address in a given process.
	475	* The server cluster is supposed to be the reference cluster.
[389]	476	* It returns a non zero error value if no vseg has been founded.
[1]	477	***********************************************************************************
	478	* @ cxy : server cluster identifier.
	479	* @ process : [in] pointer on process descriptor in server cluster.
	480	* @ vaddr : [in] virtual address to be searched.
[16]	481	* @ vseg_xp : [out] buffer for extended pointer on vseg in client cluster.
[389]	482	* @ error : [out] local pointer on buffer for error code (in client cluster).
[1]	483	**********************************************************************************/
[389]	484	void rpc_vmm_get_vseg_client( cxy_t cxy,
	485	struct process_s * process,
	486	intptr_t vaddr,
	487	xptr_t * vseg_xp,
[401]	488	error_t * error );
[1]	489
[389]	490	void rpc_vmm_get_vseg_server( xptr_t xp );
[1]	491
	492	/***********************************************************************************
[583]	493	* [21] The RPC_VMM_GLOBAL_UPDATE_PTE can be used by a thread that is not running
	494	* in reference cluster, to ask the reference cluster to update a specific entry,
	495	* identified by the <vpn> argument in all GPT copies of a process identified by
	496	* the <process> argument, using the values defined by <attr> and <ppn> arguments.
	497	* The server cluster is supposed to be the reference cluster.
	498	* It does not return any error code as the called function vmm_global_update_pte()
	499	* cannot fail.
[1]	500	***********************************************************************************
	501	* @ cxy : server cluster identifier.
[583]	502	* @ process : [in] pointer on process descriptor in server cluster.
	503	* @ vpn : [in] virtual address to be searched.
	504	* @ attr : [in] PTE attributes.
	505	* @ ppn : [it] PTE PPN.
[1]	506	**********************************************************************************/
[583]	507	void rpc_vmm_global_update_pte_client( cxy_t cxy,
	508	struct process_s * process,
	509	vpn_t vpn,
	510	uint32_t attr,
	511	ppn_t ppn );
[1]	512
[583]	513	void rpc_vmm_global_update_pte_server( xptr_t xp );
[1]	514
	515	/***********************************************************************************
[23]	516	* [22] The RPC_KCM_ALLOC allocates memory from a given KCM in a remote cluster,
	517	* and returns an extended pointer on the allocated object.
	518	It returns XPTR_NULL if physical memory cannot be allocated.
[1]	519	***********************************************************************************
[23]	520	* @ cxy : server cluster identifier.
	521	* @ kmem_type : [in] KCM object type (as defined in kmem.h).
	522	* @ buf_xp : [out] buffer for extended pointer on allocated buffer.
[1]	523	**********************************************************************************/
[23]	524	void rpc_kcm_alloc_client( cxy_t cxy,
	525	uint32_t kmem_type,
	526	xptr_t * buf_xp );
[1]	527
[23]	528	void rpc_kcm_alloc_server( xptr_t xp );
[1]	529
	530	/***********************************************************************************
[23]	531	* [23] The RPC_KCM_FREE releases memory allocated for a KCM object of a given type,
[1]	532	* in a remote cluster.
	533	***********************************************************************************
[23]	534	* @ cxy : server cluster identifier.
	535	* @ buf : [in] local pointer on allocated buffer.
	536	* @ kmem_type : [in] KCM object type (as defined in kmem.h).
[1]	537	**********************************************************************************/
[23]	538	void rpc_kcm_free_client( cxy_t cxy,
	539	void * buf,
	540	uint32_t kmem_type );
[1]	541
[23]	542	void rpc_kcm_free_server( xptr_t xp );
[1]	543
	544	/***********************************************************************************
[313]	545	* [24] The RPC_MAPPER_MOVE_BUFFER allows a client thread to require a remote
	546	* mapper to move data to/from a kernel or user buffer.
	547	* - It calls the mapper_move_user() function for a - possibly distributed -
	548	* user buffer identified by a user-space pointer, and casted to uint64_t.
	549	* - It calls the mapper_move_kernel() function for a - possibly remote -
	550	* kernel buffer identified by an extended pointer, and casted to uint64_t.
	551	* It is used by the vfs_move_user() function to move data between a mapper
	552	* and an user buffer required by a sys_read() or a sys_write().
	553	* It is used by the vmm_get_one_ppn() function to initialise a physical page
	554	* from a .elf file mapper, for a CODE or DATA vseg page fault.
[1]	555	***********************************************************************************
[23]	556	* @ cxy : server cluster identifier.
	557	* @ mapper : [in] local pointer on mapper
[313]	558	* @ to_buffer : [in] move data from mapper to buffer if non zero.
	559	* @ is_user : [in] buffer in user space if true
[23]	560	* @ file_offset : [in] first byte to move in mapper
[313]	561	* @ buffer : [in] user space pointer / kernel extended pointer
[23]	562	* @ size : [in] number of bytes to move
	563	* @ error : [out] error status (0 if success).
[1]	564	**********************************************************************************/
[265]	565	void rpc_mapper_move_buffer_client( cxy_t cxy,
	566	struct mapper_s * mapper,
	567	bool_t to_buffer,
	568	bool_t is_user,
	569	uint32_t file_offset,
[313]	570	uint64_t buffer,
[265]	571	uint32_t size,
	572	error_t * error );
[1]	573
[265]	574	void rpc_mapper_move_buffer_server( xptr_t xp );
[1]	575
[313]	576	/***********************************************************************************
	577	* [25] The RPC_MAPPER_GET_PAGE allows a client thread to get the local pointer
	578	* on a remote page descriptor, for a page, identified by the page index in mapper.
	579	* It is used by the vmm_get_one_ppn() function to handle a page fault on
	580	* a FILE type vseg.
	581	***********************************************************************************
	582	* @ cxy : server cluster identifier.
	583	* @ mapper : [in] local pointer on mapper.
	584	* @ index : [in] page index in mapper.
	585	* @ page : [out] local pointer on page descriptor / NULL if failure.
	586	**********************************************************************************/
	587	void rpc_mapper_get_page_client( cxy_t cxy,
	588	struct mapper_s * mapper,
	589	uint32_t index,
	590	struct page_s ** page );
[1]	591
[313]	592	void rpc_mapper_get_page_server( xptr_t xp );
[1]	593
[407]	594	/***********************************************************************************
	595	* [26] The RPC_VMM_CREATE_VSEG allows a client thread to request the remote
	596	* reference cluster of a given process to allocate and register in the reference
	597	* process VMM a new vseg descriptor.
	598	* On the server side, this RPC uses the vmm_create_vseg() function, and returns
	599	* to the client the local pointer on the created vseg descriptor.
	600	***********************************************************************************
	601	* @ cxy : server cluster identifier.
	602	* @ process : [in] local pointer on process descriptor in server.
	603	* @ type : [in] vseg type.
	604	* @ base : [in] base address (unused for dynamically allocated vsegs).
	605	* @ size : [in] number of bytes.
	606	* @ file_offset : [in] offset in file (for CODE, DATA, FILE types).
	607	* @ file_size : [in] can be smaller than size for DATA type.
	608	* @ mapper_xp : [in] extended pointer on mapper (for CODE, DATA, FILE types).
	609	* @ vseg_cxy : [in] target cluster for mapping (if not data type).
	610	* @ vseg : [out] local pointer on vseg descriptor / NULL if failure.
	611	**********************************************************************************/
	612	void rpc_vmm_create_vseg_client( cxy_t cxy,
	613	struct process_s * process,
	614	vseg_type_t type,
	615	intptr_t base,
	616	uint32_t size,
	617	uint32_t file_offset,
	618	uint32_t file_size,
	619	xptr_t mapper_xp,
	620	cxy_t vseg_cxy,
	621	struct vseg_s ** vseg );
	622
	623	void rpc_vmm_create_vseg_server( xptr_t xp );
	624
	625	/***********************************************************************************
[450]	626	* [27] undefined slot
[407]	627	**********************************************************************************/
	628
[408]	629	/***********************************************************************************
	630	* [28] The RPC_VMM_SET_COW allows a client thread to request the remote reference
	631	* cluster to set the COW flag and reset the WRITABLE flag of all GPT entries for
	632	* the DATA, MMAP and REMOTE vsegs of process identified by the <process> argument.
	633
	634	* of a remote scheduler, identified by the <lid> argument.
	635	***********************************************************************************
	636	* @ cxy : server cluster identifier.
	637	* @ process : [in] local pointer on reference process descriptor.
	638	**********************************************************************************/
	639	void rpc_vmm_set_cow_client( cxy_t cxy,
	640	struct process_s * process );
	641
	642	void rpc_vmm_set_cow_server( xptr_t xp );
	643
[428]	644	/***********************************************************************************
	645	* [29] The RPC_VMM_DISPLAY allows any client thread to display the VMM state
	646	* of a remote reference process identified by the <cxy> and <process> arguments.
	647	* The type of display is defined by the <detailed> boolean argument.
	648	***********************************************************************************
	649	* @ cxy : server cluster identifier.
	650	* @ process : [in] local pointer on reference process descriptor.
	651	* @ detailed : [in] detailed display if true.
	652	**********************************************************************************/
	653	void rpc_vmm_display_client( cxy_t cxy,
	654	struct process_s * process,
	655	bool_t detailed );
	656
	657	void rpc_vmm_display_server( xptr_t xp );
	658
	659
[1]	660	#endif

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