source: trunk/kernel/kern/rpc.h @ 408

Last change on this file since 408 was 408, checked in by alain, 4 years ago

Fix several bugs in the fork() syscall.

File size: 33.3 KB
Line 
1/*
2 * rpc.h - RPC (Remote Procedure Call) operations definition.
3 *
4 * Author  Alain Greiner (2016,2017)
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
27#include <kernel_config.h>
28#include <hal_types.h>
29#include <hal_atomic.h>
30#include <bits.h>
31#include <spinlock.h>
32#include <vseg.h>
33#include <remote_fifo.h>
34
35/**** Forward declarations ****/
36
37struct process_s;
38struct page_s;
39struct vseg_s;
40struct exec_info_s;
41struct pthread_attr_s;
42struct remote_sem_s;
43struct fragment_s;
44struct vfs_inode_s;
45struct vfs_dentry_s;
46struct vfs_file_s;
47struct thread_s;
48struct mapper_s;
49
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
59typedef enum
60{
61    RPC_PMEM_GET_PAGES         = 0,
62    RPC_PROCESS_MAKE_EXEC      = 1,     
63    RPC_PROCESS_MAKE_FORK      = 2,
64    RPC_PROCESS_KILL           = 3,
65    RPC_THREAD_USER_CREATE     = 4,
66    RPC_THREAD_KERNEL_CREATE   = 5,
67    RPC_SIGNAL_RISE            = 6,
68
69    RPC_VFS_INODE_CREATE       = 10,
70    RPC_VFS_INODE_DESTROY      = 11,
71    RPC_VFS_DENTRY_CREATE      = 12,
72    RPC_VFS_DENTRY_DESTROY     = 13,
73    RPC_VFS_FILE_CREATE        = 14,
74    RPC_VFS_FILE_DESTROY       = 15,
75    RPC_VFS_INODE_LOAD         = 16,
76    RPC_VFS_MAPPER_LOAD_ALL    = 17,
77    RPC_FATFS_GET_CLUSTER      = 18,
78
79    RPC_VMM_GET_VSEG           = 20,
80    RPC_VMM_GET_PTE            = 21,
81    RPC_KCM_ALLOC              = 22,
82    RPC_KCM_FREE               = 23,
83    RPC_MAPPER_MOVE_BUFFER     = 24,
84    RPC_MAPPER_GET_PAGE        = 25,
85    RPC_VMM_CREATE_VSEG        = 26,
86    RPC_SCHED_DISPLAY          = 27,
87    RPC_VMM_SET_COW            = 28,
88    RPC_MAX_INDEX              = 30,
89}
90rpc_index_t;
91
92/***********************************************************************************
93 * This defines the prototype of the rpc_server functions,
94 * defined by the rpc_server[] array in the rpc.c file.
95 **********************************************************************************/
96
97typedef  void (rpc_server_t) ( xptr_t xp );
98
99/***********************************************************************************
100 *  This structure defines the RPC descriptor
101 **********************************************************************************/
102
103typedef struct rpc_desc_s
104{
105        rpc_index_t         index;       /*! index of requested RPC service           */
106        volatile uint32_t   response;    /*! response valid when 0                    */
107    struct thread_s   * thread;      /*! local pointer on client thread           */
108    uint32_t            lid;         /*! index of core running the calling thread */ 
109    uint64_t            args[10];    /*! input/output arguments buffer            */
110} 
111rpc_desc_t;
112
113/**********************************************************************************/
114/******* Generic functions supporting RPCs : client side **************************/
115/**********************************************************************************/
116
117/***********************************************************************************
118 * This blocking function executes on the client core.
119 * It puts one RPC extended pointer in the remote fifo.
120 * It sends an IPI if fifo is empty, and waits until RPC response available.
121 * The RPC descriptor must be allocated in the caller's stack
122 * and initialised by the caller.  Exit with a Panic message if remote fifo
123 * is still full after (CONFIG_RPC_PUT_MAX_ITERATIONS) retries.
124 ***********************************************************************************
125 * @ cxy   : server cluster identifier
126 * @ desc  : local pointer on RPC descriptor in client cluster
127 **********************************************************************************/
128void rpc_send_sync( cxy_t        cxy,   
129                    rpc_desc_t * desc );
130
131
132
133/**********************************************************************************/
134/******* Generic functions supporting RPCs : server side **************************/
135/**********************************************************************************/
136
137/***********************************************************************************
138 * This function is the entry point for RPC handling on the server side.
139 * It is executed by a core receiving an IPI, and each time the core enters,
140 * or exit the kernel to handle .
141 * It does nothing and return if the RPC_FIFO is empty.
142 * The calling thread checks if it exist at least one non-blocked RPC thread,
143 * creates a new RPC if required, and deschedule to allow the RPC thead to execute.
144 **********************************************************************************/
145void rpc_check();
146
147/***********************************************************************************
148 * This function contains the loop to execute all pending RPCs on the server side.
149 * It is called by the rpc_thread_func() function with irq disabled, and after
150 * RPC_FIFO ownership acquisition.
151 ***********************************************************************************
152 * @ rpc_fifo  : pointer on the local RPC fifo
153 **********************************************************************************/
154void rpc_execute_all( remote_fifo_t * rpc_fifo );
155
156/***********************************************************************************
157 * This function contains the infinite loop executed by a RPC thread.
158 **********************************************************************************/
159void rpc_thread_func();
160
161/***********************************************************************************
162 * This function is executed in case of illegal RPC index.
163 **********************************************************************************/
164void __attribute__((noinline)) rpc_undefined();
165
166
167
168
169/**********************************************************************************/
170/******* Marshalling functions attached to the various RPCs ***********************/
171/**********************************************************************************/
172
173/***********************************************************************************
174 * [0] The RPC_PMEM_GET_PAGES allocates one or several pages in a remote cluster,
175 * and returns the local pointer on the page descriptor.
176 ***********************************************************************************
177 * @ cxy     : server cluster identifier
178 * @ order   : [in]  ln2( number of requested pages )
179 * @ page    : [out] local pointer on page descriptor / NULL if failure
180 **********************************************************************************/
181void rpc_pmem_get_pages_client( cxy_t             cxy,
182                                uint32_t          order,
183                                struct page_s  ** page );
184
185void rpc_pmem_get_pages_server( xptr_t xp );
186
187/***********************************************************************************
188 * [1] The RPC_PROCESS_MAKE_EXEC creates a new process descriptor, from an existing
189 * process descriptor in a remote server cluster. This server cluster must be
190 * the owner cluster for the existing process. The new process descriptor is
191 * initialized from informations found in the <exec_info> structure.
192 * A new main thread descriptor is created in the server cluster.
193 * All copies of the old process descriptor and all old threads are destroyed.
194 ***********************************************************************************
195 * @ cxy     : server cluster identifier.
196 * @ process : [in]  local pointer on the exec_info structure in client cluster.
197 * @ error   : [out] error status (0 if success).
198 **********************************************************************************/
199void rpc_process_make_exec_client( cxy_t                cxy,
200                                   struct exec_info_s * info, 
201                                   error_t            * error );
202
203void rpc_process_make_exec_server( xptr_t xp );
204
205/***********************************************************************************
206 * [2] The RPC_PROCESS_MAKE_FORK creates a "child" process descriptor, and the
207 * associated "child" thread descriptor in a target remote cluster that can be
208 * any cluster.  The child process is initialized from informations found in the
209 * "parent" process descriptor (that must be the parent reference cluster),
210 * and from the "parent" thread descriptor that can be in any cluster.
211 ***********************************************************************************
212 * @ cxy              : server cluster identifier.
213 * @ ref_process_xp   : [in]  extended pointer on reference parent process.
214 * @ parent_thread_xp : [in]  extended pointer on parent thread.
215 * @ child_pid        : [out] child process identifier.
216 * @ child_thread_ptr : [out] local pointer on child thread.
217 * @ error            : [out]  error status (0 if success).
218 **********************************************************************************/
219void rpc_process_make_fork_client( cxy_t              cxy,
220                                   xptr_t             ref_process_xp,
221                                   xptr_t             parent_thread_xp,
222                                   pid_t            * child_pid,
223                                   struct thread_s ** child_thread_ptr,
224                                   error_t          * error );
225
226void rpc_process_make_fork_server( xptr_t xp );
227
228/***********************************************************************************
229 * [3] The RPC_PROCESS_KILL is actually a multicast RPC sent by the reference cluster
230 * to other clusters containing a process descriptor copy, to destroy these copies.
231 ***********************************************************************************
232 * @ process  : local pointer on target process.
233 **********************************************************************************/
234void rpc_process_kill_client( struct process_s * process );
235
236void rpc_process_kill_server( xptr_t xp );
237
238/***********************************************************************************
239 * [4] The RPC_THREAD_USER_CREATE creates an user thread in the server cluster,
240 * as specified by the arguments. It returns an extended pointer on the new
241 * thread descriptor in server cluster, and an error code.
242 * It is called by the sys_thread_create() system call.
243 ***********************************************************************************
244 * @ cxy       : server cluster identifier.
245 * @ attr      : [in]  local pointer on pthread_attr_t in client cluster.
246 * @ thread_xp : [out] buffer for thread extended pointer.
247 * @ error     : [out] error status (0 if success).
248 **********************************************************************************/
249void rpc_thread_user_create_client( cxy_t                   cxy,
250                                    pid_t                   pid,
251                                    void                  * start_func,
252                                    void                  * start_arg,
253                                    pthread_attr_t        * attr,
254                                    xptr_t                * thread_xp,
255                                    error_t               * error );
256
257void rpc_thread_user_create_server( xptr_t xp );
258
259/***********************************************************************************
260 * [5] The RPC_THREAD_KERNEL_CREATE creates a kernel thread in the server cluster,
261 * as specified by the type, func and args arguments. It returns the local pointer
262 * on the thread descriptor in server cluster and an error code.
263 * It is used by the dev_init() function to create the device server thread.
264 ***********************************************************************************
265 * @ cxy       : server cluster identifier.
266 * @ type      : [in]  type of kernel thread.
267 * @ func      : [in]  local pointer on thread function.
268 * @ args      : [in]  local pointer on function arguments.
269 * @ thread_xp : [out] pointer on buffer for thread extended pointer.
270 * @ error     : [out] error status (0 if success).
271 **********************************************************************************/
272void rpc_thread_kernel_create_client( cxy_t     cxy,
273                                      uint32_t  type,
274                                      void    * func,
275                                      void    * args,
276                                      xptr_t  * thread_xp,
277                                      error_t * error );
278
279void rpc_thread_kernel_create_server( xptr_t xp );
280
281/***********************************************************************************
282 * [6] The RPC_SIGNAL_RISE ask a target cluster to register a given signal in
283 * all threads descriptors of a given process.
284 * It is used by the sys_kill() function.
285 ***********************************************************************************
286 * @ cxy       : server cluster identifier.
287 * @ process   : [in]  local pointer on target process descriptor in server.
288 * @ sig_id    : [in]  signal index.
289 **********************************************************************************/
290void rpc_signal_rise_client( cxy_t              cxy,
291                             struct process_s * process,
292                             uint32_t           sig_id );
293                             
294void rpc_signal_rise_server( xptr_t xp );
295
296/***********************************************************************************
297 * [10] The RPC_VFS_INODE_CREATE creates an inode and the associated mapper in a
298 * remote cluster. The parent dentry must have been previously created.
299 * It returns an extended pointer on the created inode.
300 ***********************************************************************************
301 * @ cxy        :  server cluster identifier.
302 * @ dentry_xp  : [in]  extended pointer on parent dentry.
303 * @ fs_type    : [in]  file system type.
304 * @ inode_type : [in]  file system type.
305 * @ extend     : [in]  fs_type_specific inode extension.
306 * @ attr       : [in]  inode attributes.
307 * @ rights     : [in]  access rights
308 * @ uid        : [in]  user ID
309 * @ gid        : [in]  group ID
310 * @ inode_xp   : [out] buffer for extended pointer on created inode.
311 * @ error      : [out] error status (0 if success).
312 **********************************************************************************/
313void rpc_vfs_inode_create_client( cxy_t      cxy,
314                                  xptr_t     dentry_xp,
315                                  uint32_t   fs_type,
316                                  uint32_t   inode_type,
317                                  void     * extend,
318                                  uint32_t   attr,   
319                                  uint32_t   rights, 
320                                  uint32_t   uid,
321                                  uint32_t   gid,
322                                  xptr_t   * inode_xp,
323                                  error_t  * error );
324
325void rpc_vfs_inode_create_server( xptr_t xp );
326
327/***********************************************************************************
328 * [11] The RPC_VFS_INODE_DESTROY releases memory allocated for an inode descriptor
329 * and for the associated mapper in a remote cluster.
330 ***********************************************************************************
331 * @ cxy       :  server cluster identifier
332 * @ inode     : [in]  local pointer on inode.
333 **********************************************************************************/
334void rpc_vfs_inode_destroy_client( cxy_t                 cxy,
335                                   struct vfs_inode_s * inode );
336
337void rpc_vfs_inode_destroy_server( xptr_t xp );
338
339/***********************************************************************************
340 * [12] The RPC_VFS_DENTRY_CREATE creates a dentry in a remote cluster.
341 * It returns an extended pointer on the created dentry.
342 ***********************************************************************************
343 * @ cxy        :  server cluster identifier
344 * @ type       : [in]  file system type.
345 * @ name       : [in]  directory entry name.
346 * @ parent     : [in]  local pointer on parent inode.
347 * @ dentry_xp  : [out] buffer for extended pointer on created dentry.
348 * @ error      : [out] error status (0 if success).
349 **********************************************************************************/
350void rpc_vfs_dentry_create_client( cxy_t                  cxy,
351                                   uint32_t               type,
352                                   char                 * name,   
353                                   struct vfs_inode_s   * parent,
354                                   xptr_t               * dentry_xp,
355                                   error_t              * error );
356
357void rpc_vfs_dentry_create_server( xptr_t xp );
358
359/***********************************************************************************
360 * [13] The RPC_VFS_DENTRY_DESTROY releases memory allocated for an dentry descriptor
361 * in a remote cluster.
362 ***********************************************************************************
363 * @ cxy       :  server cluster identifier
364 * @ dentry     : [in]  local pointer on dentry.
365 **********************************************************************************/
366void rpc_vfs_dentry_destroy_client( cxy_t                 cxy,
367                                    struct vfs_dentry_s * dentry );
368
369void rpc_vfs_dentry_destroy_server( xptr_t xp );
370
371/***********************************************************************************
372 * [14] The RPC_VFS_FILE_CREATE creates a file descriptor in a remote cluster.
373 * It returns an extended pointer on the created file structure.
374 ***********************************************************************************
375 * @ cxy        :  server cluster identifier
376 * @ inode      : [in]  local pointer on parent inode.
377 * @ file_attr  : [in]  new file attributes.
378 * @ file_xp    : [out] buffer for extended pointer on created file.
379 * @ error      : [out] error status (0 if success).
380 **********************************************************************************/
381void rpc_vfs_file_create_client( cxy_t                  cxy,
382                                 struct vfs_inode_s   * inode,
383                                 uint32_t               file_attr,
384                                 xptr_t               * file_xp,
385                                 error_t              * error );
386
387void rpc_vfs_file_create_server( xptr_t xp );
388
389/***********************************************************************************
390 * [15] The RPC_VFS_FILE_DESTROY releases memory allocated for a file descriptor
391 * in a remote cluster.
392 ***********************************************************************************
393 * @ cxy       :  server cluster identifier
394 * @ file       : [in]  local pointer on file.
395 **********************************************************************************/
396void rpc_vfs_file_destroy_client( cxy_t               cxy,
397                                  struct vfs_file_s * file );
398
399void rpc_vfs_file_destroy_server( xptr_t xp );
400
401/***********************************************************************************
402 * [16] The RPC_VFS_LOAD_INODE calls the vfs_inode_load() kernel function in a
403 * remote cluster containing a parent inode directory to scan the associated
404 * mapper, find a directory entry, identified by its name, and update the remote
405 * child inode.
406 ***********************************************************************************
407 * @ cxy            :  server cluster identifier
408 * @ parent_inode   : [in]  local pointer on parent inode.
409 * @ name           : [in]  local pointer on child name (in client cluster).
410 * @ child_inode_xp : [in]  extended pointer on child inode (in another cluster).
411 * @ error          : [out] error status (0 if success).
412 **********************************************************************************/
413void rpc_vfs_inode_load_client( cxy_t                cxy,
414                                struct vfs_inode_s * parent_inode,
415                                char               * name,
416                                xptr_t               child_inode_xp,
417                                error_t            * error );
418
419void rpc_vfs_inode_load_server( xptr_t xp );
420
421/***********************************************************************************
422 * [17] The RPC_VFS_MAPPER_LOAD_ALL calls the vfs_mapper_load_all() kernel function
423 * in a remote cluster containing an inode, to load all pages of the associated
424 * mapper from the file system on device.
425 ***********************************************************************************
426 * @ cxy     :  server cluster identifier
427 * @ inode   : [in]  local pointer on inode in server cluster.
428 * @ error   : [out] error status (0 if success).
429 **********************************************************************************/
430void rpc_vfs_mapper_load_all_client( cxy_t                cxy,
431                                     struct vfs_inode_s * inode,
432                                     error_t            * error );
433
434void rpc_vfs_mapper_load_all_server( xptr_t xp );
435
436/***********************************************************************************
437 * [18] The RPC_FATFS_GET_CLUSTER can be send by any thread running in a "client"
438 * cluster to scan the FAT mapper, stored in a remote "server" cluster, and get
439 * from the mapper the local pointer on a given page.
440 ***********************************************************************************
441 * @ cxy      : server cluster identifier.
442 * @ mapper   : [in]  local pointer on FAT mapper.
443 * @ first    : [in]  FATFS cluster index allocated to first page of file.
444 * @ page     : [in]  page index in file.
445 * @ cluster  : [out] local pointer on buffer for found FATFS cluster index.
446 * @ error    : [out] local pointer on buffer for error code (in client cluster).
447 **********************************************************************************/
448void rpc_fatfs_get_cluster_client( cxy_t             cxy,
449                                   struct mapper_s * mapper,
450                                   uint32_t          first,
451                                   uint32_t          page,
452                                   uint32_t        * cluster,
453                                   error_t         * error );   
454
455void rpc_fatfs_get_cluster_server( xptr_t xp );
456
457/***********************************************************************************
458 * [20] The RPC_VMM_GET_VSEG returns an extended pointer
459 * on the vseg containing a given virtual address in a given process.
460 * The server cluster is supposed to be the reference cluster.
461 * It returns a non zero error value if no vseg has been founded.
462 ***********************************************************************************
463 * @ cxy     : server cluster identifier.
464 * @ process : [in]   pointer on process descriptor in server cluster.
465 * @ vaddr   : [in]   virtual address to be searched.
466 * @ vseg_xp : [out]  buffer for extended pointer on vseg in client cluster.
467 * @ error   : [out] local pointer on buffer for error code (in client cluster).
468 **********************************************************************************/
469void rpc_vmm_get_vseg_client( cxy_t              cxy,
470                              struct process_s * process,
471                              intptr_t           vaddr,
472                              xptr_t           * vseg_xp,
473                              error_t          * error );
474
475void rpc_vmm_get_vseg_server( xptr_t xp );
476
477/***********************************************************************************
478 * [21] The RPC_VMM_GET_PTE returns in the <ppn> and <attr> arguments the PTE value
479 * for a given <vpn> in a given <process> (page_fault or copy_on_write event).
480 * The server cluster is supposed to be the reference cluster, and the vseg
481 * containing the VPN must be registered in the reference VMM.
482 * It returns an error if physical memory cannot be allocated for the missing PTE2,
483 * or for the missing page itself.
484 ***********************************************************************************
485 * @ cxy     : server cluster identifier.
486 * @ process : [in]   pointer on process descriptor in server cluster.
487 * @ vaddr   : [in]   virtual address to be searched.
488 * @ cow     : [in]   "copy_on_write" event if true / "page_fault" event if false.
489 * @ attr    : [out]  address of buffer for attributes.
490 * @ ppn     : [out]  address of buffer for PPN.
491 * @ error   : [out]  address of buffer for error code.
492 **********************************************************************************/
493void rpc_vmm_get_pte_client( cxy_t              cxy,
494                             struct process_s * process,
495                             vpn_t              vpn,
496                             bool_t             cow,
497                             uint32_t         * attr,
498                             ppn_t            * ppn,
499                             error_t          * error );
500
501void rpc_vmm_get_pte_server( xptr_t xp );
502
503/***********************************************************************************
504 * [22] The RPC_KCM_ALLOC allocates memory from a given KCM in a remote cluster,
505 * and returns an extended pointer on the allocated object.
506  It returns XPTR_NULL if physical memory cannot be allocated.
507 ***********************************************************************************
508 * @ cxy       : server cluster identifier.
509 * @ kmem_type : [in]  KCM object type (as defined in kmem.h).
510 * @ buf_xp    : [out] buffer for extended pointer on allocated buffer.
511 **********************************************************************************/
512void rpc_kcm_alloc_client( cxy_t      cxy,
513                           uint32_t   kmem_type,
514                           xptr_t   * buf_xp ); 
515
516void rpc_kcm_alloc_server( xptr_t xp );
517
518/***********************************************************************************
519 * [23] The RPC_KCM_FREE releases memory allocated for a KCM object of a given type,
520 * in a remote cluster.
521 ***********************************************************************************
522 * @ cxy       : server cluster identifier.
523 * @ buf       : [in] local pointer on allocated buffer.
524 * @ kmem_type : [in]  KCM object type (as defined in kmem.h).
525 **********************************************************************************/
526void rpc_kcm_free_client( cxy_t     cxy,
527                          void    * buf,
528                          uint32_t  kmem_type );
529
530void rpc_kcm_free_server( xptr_t xp );
531
532/***********************************************************************************
533 * [24] The RPC_MAPPER_MOVE_BUFFER allows a client thread to require a remote
534 * mapper to move data to/from a kernel or user buffer.
535 * - It calls the mapper_move_user() function for a - possibly distributed -
536 *   user buffer identified by a user-space pointer, and casted to uint64_t.
537 * - It calls the mapper_move_kernel() function for a - possibly remote -
538 *   kernel buffer identified by an extended pointer, and casted to uint64_t.
539 * It is used by the vfs_move_user() function to move data between a mapper
540 * and an user buffer required by a sys_read() or a sys_write().
541 * It is used by the vmm_get_one_ppn() function to initialise a physical page
542 * from a .elf file mapper, for a CODE or DATA vseg page fault.
543 ***********************************************************************************
544 * @ cxy         : server cluster identifier.
545 * @ mapper      : [in]  local pointer on mapper
546 * @ to_buffer   : [in]  move data from mapper to buffer if non zero.
547 * @ is_user     : [in]  buffer in user space if true
548 * @ file_offset : [in]  first byte to move in mapper
549 * @ buffer      : [in]  user space pointer / kernel extended pointer
550 * @ size        : [in]  number of bytes to move
551 * @ error       : [out] error status (0 if success).
552 **********************************************************************************/
553void rpc_mapper_move_buffer_client( cxy_t             cxy,
554                                    struct mapper_s * mapper,
555                                    bool_t            to_buffer,
556                                    bool_t            is_user,
557                                    uint32_t          file_offset,
558                                    uint64_t          buffer,
559                                    uint32_t          size,
560                                    error_t         * error );
561
562void rpc_mapper_move_buffer_server( xptr_t xp );
563
564/***********************************************************************************
565 * [25] The RPC_MAPPER_GET_PAGE allows a client thread to get the local pointer
566 * on a remote page descriptor, for a page, identified by the page index in mapper.
567 * It is used by the vmm_get_one_ppn() function to handle a page fault on
568 * a FILE type vseg.
569 ***********************************************************************************
570 * @ cxy         : server cluster identifier.
571 * @ mapper      : [in]  local pointer on mapper.
572 * @ index       : [in]  page index in mapper.
573 * @ page        : [out] local pointer on page descriptor / NULL if failure.
574 **********************************************************************************/
575void rpc_mapper_get_page_client( cxy_t             cxy,
576                                 struct mapper_s * mapper,
577                                 uint32_t          index,
578                                 struct page_s  ** page );
579
580void rpc_mapper_get_page_server( xptr_t xp );
581
582/***********************************************************************************
583 * [26] The RPC_VMM_CREATE_VSEG allows a client thread to request the remote
584 * reference cluster of a given process to allocate and register in the reference
585 * process VMM a new vseg descriptor.
586 * On the server side, this RPC uses the vmm_create_vseg() function, and returns
587 * to the client the local pointer on the created vseg descriptor.
588 ***********************************************************************************
589 * @ cxy         : server cluster identifier.
590 * @ process     : [in]  local pointer on process descriptor in server.
591 * @ type        : [in]  vseg type.
592 * @ base        : [in]  base address (unused for dynamically allocated vsegs).
593 * @ size        : [in]  number of bytes.
594 * @ file_offset : [in]  offset in file (for CODE, DATA, FILE types).
595 * @ file_size   : [in]  can be smaller than size for DATA type.
596 * @ mapper_xp   : [in]  extended pointer on mapper (for CODE, DATA, FILE types).
597 * @ vseg_cxy    : [in]  target cluster for mapping (if not data type).
598 * @ vseg        : [out] local pointer on vseg descriptor / NULL if failure.
599 **********************************************************************************/
600void rpc_vmm_create_vseg_client( cxy_t              cxy,
601                                 struct process_s * process,
602                                 vseg_type_t        type,
603                                 intptr_t           base,
604                                 uint32_t           size,
605                                 uint32_t           file_offset,
606                                 uint32_t           file_size,
607                                 xptr_t             mapper_xp,
608                                 cxy_t              vseg_cxy,
609                                 struct vseg_s   ** vseg );
610
611void rpc_vmm_create_vseg_server( xptr_t xp );
612
613/***********************************************************************************
614 * [27] The RPC_SCHED_DISPLAY allows a client thread to request the display
615 * of a remote scheduler, identified by the <lid> argument.
616 ***********************************************************************************
617 * @ cxy         : server cluster identifier.
618 * @ lid         : [in]  local index of target core in client cluster.
619 **********************************************************************************/
620void rpc_sched_display_client( cxy_t              cxy,
621                               lid_t              lid );
622
623void rpc_sched_display_server( xptr_t xp );
624
625/***********************************************************************************
626 * [28] The RPC_VMM_SET_COW allows a client thread to request the remote reference
627 * cluster to set the COW flag and reset the WRITABLE flag of all GPT entries for
628 * the DATA, MMAP and REMOTE vsegs of process identified by the <process> argument.
629
630 * of a remote scheduler, identified by the <lid> argument.
631 ***********************************************************************************
632 * @ cxy         : server cluster identifier.
633 * @ process     : [in]  local pointer on reference process descriptor.
634 **********************************************************************************/
635void rpc_vmm_set_cow_client( cxy_t              cxy,
636                             struct process_s * process );
637
638void rpc_vmm_set_cow_server( xptr_t xp );
639
640#endif
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