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source: trunk/kernel/fs/vfs.c @ 653

Last change on this file since 653 was 651, checked in by alain, 5 years ago
1) Improve the VMM MMAP allocator: implement the "buddy" algorithm to allocate only aligned blocks. 2) fix a bug in the pthread_join() / pthread_exit() mmechanism.
File size: 134.1 KB

Rev	Line
[1]	1	/*
	2	* vfs.c - Virtual File System implementation.
	3	*
	4	* Author Mohamed Lamine Karaoui (2015)
[623]	5	* Alain Greiner (2016,2017,2018,2019)
[1]	6	*
	7	* Copyright (c) UPMC Sorbonne Universites
	8	*
	9	* This file is part of ALMOS-MKH.
	10	*
	11	* ALMOS-MKH is free software; you can redistribute it and/or modify it
	12	* under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; version 2.0 of the License.
	14	*
	15	* ALMOS-MKH is distributed in the hope that it will be useful, but
	16	* WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	18	* General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with ALMOS-MKH; if not, write to the Free Software Foundation,
	22	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	23	*/
	24
[14]	25	#include <kernel_config.h>
[457]	26	#include <hal_kernel_types.h>
[1]	27	#include <hal_atomic.h>
	28	#include <hal_special.h>
	29	#include <printk.h>
	30	#include <list.h>
	31	#include <xlist.h>
	32	#include <slist.h>
	33	#include <xhtab.h>
[430]	34	#include <string.h>
[23]	35	#include <rpc.h>
[1]	36	#include <errno.h>
	37	#include <kmem.h>
	38	#include <mapper.h>
	39	#include <thread.h>
[337]	40	#include <chdev.h>
[1]	41	#include <process.h>
[568]	42	#include <cluster.h>
[23]	43	#include <vfs.h>
[1]	44	#include <fatfs.h>
	45	#include <ramfs.h>
[23]	46	#include <devfs.h>
	47	#include <syscalls.h>
[1]	48
	49	//////////////////////////////////////////////////////////////////////////////////////////
[50]	50	// Extern variables
[1]	51	//////////////////////////////////////////////////////////////////////////////////////////
	52
[337]	53	extern vfs_ctx_t fs_context[FS_TYPES_NR]; // allocated in kernel_init.c
	54	extern chdev_directory_t chdev_dir; // allocated in kernel_init.c
[568]	55	extern char * lock_type_str[]; // allocated in kernel_init.c
[50]	56
[602]	57	///////////////////////////////////////////////////////////////////////////////////////////
	58	// VFS Context related functions
[1]	59	//////////////////////////////////////////////////////////////////////////////////////////
	60
[188]	61	////////////////////////////////////////
	62	void vfs_ctx_init( vfs_fs_type_t type,
	63	uint32_t attr,
	64	uint32_t total_clusters,
	65	uint32_t cluster_size,
	66	xptr_t vfs_root_xp,
	67	void * extend )
	68	{
	69	vfs_ctx_t * vfs_ctx = &fs_context[type];
	70
	71	vfs_ctx->type = type;
	72	vfs_ctx->attr = attr;
	73	vfs_ctx->total_clusters = total_clusters;
	74	vfs_ctx->cluster_size = cluster_size;
	75	vfs_ctx->vfs_root_xp = vfs_root_xp;
	76	vfs_ctx->extend = extend;
	77
[568]	78	busylock_init( &vfs_ctx->lock , LOCK_VFS_CTX );
[188]	79
	80	bitmap_init( vfs_ctx->bitmap , BITMAP_SIZE(CONFIG_VFS_MAX_INODES) );
	81	}
	82
[23]	83	////////////////////////////////////////////
[1]	84	error_t vfs_ctx_inum_alloc( vfs_ctx_t * ctx,
	85	uint32_t * inum )
	86	{
	87	// get lock on inum allocator
[568]	88	busylock_acquire( &ctx->lock );
[1]	89
	90	// get lid from local inum allocator
[23]	91	uint32_t lid = bitmap_ffc( ctx->bitmap , CONFIG_VFS_MAX_INODES );
[1]	92
[473]	93	if( lid == 0xFFFFFFFF ) // no more free slot => error
[1]	94	{
	95	// release lock
[568]	96	busylock_release( &ctx->lock );
[1]	97
	98	// return error
	99	return 1;
	100	}
	101	else // found => return inum
	102	{
	103	// set slot allocated
[23]	104	bitmap_set( ctx->bitmap , lid );
[1]	105
	106	// release lock
[568]	107	busylock_release( &ctx->lock );
[1]	108
	109	// return inum
	110	*inum = (((uint32_t)local_cxy) << 16) \| (lid & 0xFFFF);
	111	return 0;
	112	}
	113	}
	114
	115	////////////////////////////////////////////
	116	void vfs_ctx_inum_release( vfs_ctx_t * ctx,
	117	uint32_t inum )
	118	{
[23]	119	bitmap_clear( ctx->bitmap , inum & 0xFFFF );
[1]	120	}
	121
	122	//////////////////////////////////////////////////////////////////////////////////////////
[602]	123	// VFS inode descriptor related functions
[1]	124	//////////////////////////////////////////////////////////////////////////////////////////
	125
[598]	126	const char * vfs_inode_type_str( vfs_inode_type_t type )
[188]	127	{
[598]	128	switch ( type )
	129	{
	130	case INODE_TYPE_FILE: return "FILE";
	131	case INODE_TYPE_DIR: return "DIR ";
	132	case INODE_TYPE_FIFO: return "FIFO";
	133	case INODE_TYPE_PIPE: return "PIPE";
	134	case INODE_TYPE_SOCK: return "SOCK";
	135	case INODE_TYPE_DEV: return "DEV ";
[611]	136	case INODE_TYPE_BLK: return "BLK ";
[598]	137	case INODE_TYPE_SYML: return "SYML";
	138	default: return "undefined";
[527]	139	}
[188]	140	}
	141
[610]	142	////////////////////////////////////////////////////
	143	error_t vfs_inode_create( vfs_fs_type_t fs_type,
[23]	144	uint32_t attr,
	145	uint32_t rights,
	146	uid_t uid,
	147	gid_t gid,
	148	xptr_t * inode_xp )
[1]	149	{
	150	mapper_t * mapper; // associated mapper( to be allocated)
	151	vfs_inode_t * inode; // inode descriptor (to be allocated)
[635]	152
[1]	153	uint32_t inum; // inode identifier (to be allocated)
	154	vfs_ctx_t * ctx; // file system context
	155	kmem_req_t req; // request to kernel memory allocator
	156	error_t error;
	157
[23]	158	// check fs type and get pointer on context
	159	if ( fs_type == FS_TYPE_FATFS ) ctx = &fs_context[FS_TYPE_FATFS];
	160	else if( fs_type == FS_TYPE_RAMFS ) ctx = &fs_context[FS_TYPE_RAMFS];
	161	else if( fs_type == FS_TYPE_DEVFS ) ctx = &fs_context[FS_TYPE_DEVFS];
[1]	162	else
	163	{
[625]	164	printk("\n[ERROR] in %s : illegal FS type\n", __FUNCTION__ );
	165	return -1;
[1]	166	}
	167
	168	// allocate inum
	169	error = vfs_ctx_inum_alloc( ctx , &inum );
	170
	171	if( error )
	172	{
	173	printk("\n[ERROR] in %s : cannot allocate inum\n", __FUNCTION__ );
[625]	174	return -1;
[1]	175	}
	176
	177	// allocate memory for mapper
[246]	178	mapper = mapper_create( fs_type );
[1]	179
	180	if( mapper == NULL )
	181	{
	182	printk("\n[ERROR] in %s : cannot allocate mapper\n", __FUNCTION__ );
	183	vfs_ctx_inum_release( ctx , inum );
	184	return ENOMEM;
	185	}
	186
[635]	187	// check inode descriptor contained in one page
	188	assert( (sizeof(vfs_inode_t) <= CONFIG_PPM_PAGE_SIZE),
	189	"inode descriptor must fit in one page" );
	190
	191	// allocate one page for VFS inode descriptor
	192	// because the embedded "children xhtab footprint
	193	req.type = KMEM_PPM;
	194	req.order = 0;
[1]	195	req.flags = AF_KERNEL \| AF_ZERO;
[635]	196	inode = kmem_alloc( &req );
[1]	197
	198	if( inode == NULL )
	199	{
	200	printk("\n[ERROR] in %s : cannot allocate inode descriptor\n", __FUNCTION__ );
	201	vfs_ctx_inum_release( ctx , inum );
	202	mapper_destroy( mapper );
[610]	203	return -1;
[1]	204	}
	205
	206	// initialize inode descriptor
[623]	207	inode->type = INODE_TYPE_FILE; // default value
[1]	208	inode->inum = inum;
	209	inode->attr = attr;
[23]	210	inode->rights = rights;
[1]	211	inode->uid = uid;
	212	inode->gid = gid;
	213	inode->ctx = ctx;
[246]	214	inode->mapper = mapper;
[602]	215	inode->extend = NULL;
[610]	216	inode->links = 0;
[1]	217
[246]	218	// initialise inode field in mapper
	219	mapper->inode = inode;
	220
[610]	221	// initialize chidren dentries xhtab
[204]	222	xhtab_init( &inode->children , XHTAB_DENTRY_TYPE );
[1]	223
[610]	224	// initialize parents dentries xlist
	225	xlist_root_init( XPTR( local_cxy , &inode->parents ) );
	226
	227	// initialize lock protecting size
	228	remote_rwlock_init( XPTR( local_cxy , &inode->size_lock ), LOCK_VFS_SIZE );
[1]	229
[610]	230	// initialise lock protecting inode tree traversal
	231	remote_rwlock_init( XPTR( local_cxy , &inode->main_lock ), LOCK_VFS_MAIN );
[568]	232
[610]	233	// return extended pointer on inode
	234	*inode_xp = XPTR( local_cxy , inode );
	235
[438]	236	#if DEBUG_VFS_INODE_CREATE
[635]	237	char name[CONFIG_VFS_MAX_NAME_LENGTH];
	238	uint32_t cycle = (uint32_t)hal_get_cycles();
	239	thread_t * this = CURRENT_THREAD;
	240	vfs_inode_get_name( *inode_xp , name );
[438]	241	if( DEBUG_VFS_INODE_CREATE < cycle )
[635]	242	printk("\n[%s] thread[%x,%x] created <%s> / inode [%x,%x] / cycle %d\n",
[598]	243	__FUNCTION__, this->process->pid, this->trdid, name, local_cxy, inode, cycle );
[433]	244	#endif
[401]	245
[1]	246	return 0;
	247
	248	} // end vfs_inode_create()
	249
[602]	250	/////////////////////////////////////////////
	251	void vfs_inode_destroy( vfs_inode_t * inode )
[1]	252	{
	253	// release memory allocated for mapper
	254	mapper_destroy( inode->mapper );
	255
	256	// release memory allocate for inode descriptor
	257	kmem_req_t req;
[635]	258	req.type = KMEM_PPM;
[1]	259	req.ptr = inode;
	260	kmem_free( &req );
	261
	262	} // end vfs_inode_destroy()
	263
	264	//////////////////////////////////////////////
	265	uint32_t vfs_inode_get_size( xptr_t inode_xp )
	266	{
	267	// get inode cluster and local pointer
	268	cxy_t cxy = GET_CXY( inode_xp );
[473]	269	vfs_inode_t * ptr = GET_PTR( inode_xp );
[1]	270
[623]	271	// build extended pointers on lock & size
	272	xptr_t lock_xp = XPTR( cxy , &ptr->size_lock );
	273	xptr_t size_xp = XPTR( cxy , &ptr->size );
	274
	275	// take lock in read mode
	276	remote_rwlock_rd_acquire( lock_xp );
	277
[1]	278	// get size
[623]	279	uint32_t size = hal_remote_l32( size_xp );
	280
	281	// release lock from read mode
	282	remote_rwlock_rd_release( lock_xp );
	283
[1]	284	return size;
	285	}
	286
[623]	287	///////////////////////////////////////////////
	288	void vfs_inode_update_size( xptr_t inode_xp,
	289	uint32_t size )
[1]	290	{
	291	// get inode cluster and local pointer
	292	cxy_t cxy = GET_CXY( inode_xp );
[473]	293	vfs_inode_t * ptr = GET_PTR( inode_xp );
[1]	294
[623]	295	// build extended pointers on lock & size
	296	xptr_t lock_xp = XPTR( cxy , &ptr->size_lock );
	297	xptr_t size_xp = XPTR( cxy , &ptr->size );
	298
	299	// take lock in write mode
	300	remote_rwlock_wr_acquire( lock_xp );
	301
	302	// get current size
	303	uint32_t current_size = hal_remote_l32( size_xp );
	304
	305	// set size if required
	306	if( current_size < size ) hal_remote_s32( size_xp , size );
	307
	308	// release lock from write mode
	309	remote_rwlock_wr_release( lock_xp );
[1]	310	}
	311
[101]	312	////////////////////////////////////////
	313	void vfs_inode_unlock( xptr_t inode_xp )
[1]	314	{
	315	// get inode cluster and local pointer
	316	cxy_t cxy = GET_CXY( inode_xp );
[473]	317	vfs_inode_t * ptr = GET_PTR( inode_xp );
[1]	318
	319	// release the main lock
[568]	320	remote_busylock_release( XPTR( cxy , &ptr->main_lock ) );
[1]	321	}
	322
[101]	323	//////////////////////////////////////
	324	void vfs_inode_lock( xptr_t inode_xp )
[1]	325	{
	326	// get inode cluster and local pointer
	327	cxy_t cxy = GET_CXY( inode_xp );
[473]	328	vfs_inode_t * ptr = GET_PTR( inode_xp );
[1]	329
	330	// get the main lock
[568]	331	remote_busylock_acquire( XPTR( cxy , &ptr->main_lock ) );
[1]	332	}
	333
[610]	334	///////////////////////////////////////////
	335	void vfs_inode_get_name( xptr_t inode_xp,
	336	char * name )
[101]	337	{
[610]	338	cxy_t inode_cxy; // inode cluster identifier
	339	vfs_inode_t * inode_ptr; // local pointer on inode
	340	xptr_t parents_root_xp; // extended pointer on inode parents root
[204]	341
	342	// get inode cluster and local pointer
	343	inode_cxy = GET_CXY( inode_xp );
[473]	344	inode_ptr = GET_PTR( inode_xp );
[204]	345
[610]	346	// build extended pointer on parents dentries root
	347	parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents );
[204]	348
[610]	349	// check VFS root
	350	if( xlist_is_empty( parents_root_xp ) ) // inode is the VFS root
[204]	351	{
	352	strcpy( name , "/" );
	353	}
[610]	354	else // not the VFS root
[204]	355	{
[610]	356	xptr_t dentry_xp;
	357	cxy_t dentry_cxy;
	358	vfs_dentry_t * dentry_ptr;
	359
	360	// get first name in list of parents
	361	dentry_xp = XLIST_FIRST( parents_root_xp , vfs_dentry_t , parents );
[204]	362	dentry_cxy = GET_CXY( dentry_xp );
[473]	363	dentry_ptr = GET_PTR( dentry_xp );
[204]	364
	365	hal_remote_strcpy( XPTR( local_cxy , name ) ,
[610]	366	XPTR( dentry_cxy , dentry_ptr->name ) );
[204]	367	}
[610]	368
[409]	369	} // end vfs_inode_get_name()
[204]	370
[602]	371	///////////////////////////////////////////////////////
	372	error_t vfs_inode_load_all_pages( vfs_inode_t * inode )
	373	{
	374
[625]	375	assert( (inode != NULL) , "inode pointer is NULL" );
[602]	376
	377	uint32_t page_id;
	378	xptr_t page_xp;
	379
	380	mapper_t * mapper = inode->mapper;
	381	uint32_t size = inode->size;
	382
[625]	383	assert( (mapper != NULL) , "mapper pointer is NULL" );
[602]	384
	385	#if DEBUG_VFS_INODE_LOAD_ALL
	386	uint32_t cycle = (uint32_t)hal_get_cycles();
	387	thread_t * this = CURRENT_THREAD;
	388	char name[CONFIG_VFS_MAX_NAME_LENGTH];
	389	vfs_inode_get_name( XPTR( local_cxy , inode ) , name );
	390	if( DEBUG_VFS_INODE_LOAD_ALL < cycle )
	391	printk("\n[%s] thread[%x,%x] enter for <%s> in cluster %x / cycle %d\n",
	392	__FUNCTION__, this->process->pid, this->trdid, name, local_cxy, cycle );
	393	#endif
	394
	395	// compute number of pages
	396	uint32_t npages = size >> CONFIG_PPM_PAGE_SHIFT;
	397	if( (size & CONFIG_PPM_PAGE_MASK) \|\| (size == 0) ) npages++;
	398
	399	// loop on pages
	400	for( page_id = 0 ; page_id < npages ; page_id ++ )
	401	{
	402	// If the mage is missing, this function allocates the missing page,
	403	// and load the page from IOC device into mapper
	404	page_xp = mapper_remote_get_page( XPTR( local_cxy , mapper ), page_id );
	405
	406	if( page_xp == XPTR_NULL ) return -1;
	407	}
	408
	409	#if DEBUG_VFS_INODE_LOAD_ALL
	410	cycle = (uint32_t)hal_get_cycles();
	411	if( DEBUG_VFS_INODE_LOAD_ALL < cycle )
	412	printk("\n[%s] thread[%x,%x] exit for <%x> in cluster %x / cycle %d\n",
	413	__FUNCTION__, this->process->pid, this->trdid, name, local_cxy, cycle );
	414	#endif
	415
	416	return 0;
	417
	418	} // end vfs_inode_load_all_pages()
	419
[626]	420	/////////////////////////////////////////
	421	void vfs_inode_display( xptr_t inode_xp )
	422	{
	423	assert( (inode_xp != XPTR_NULL), "inode pointer is NULL");
	424
	425	char name[CONFIG_VFS_MAX_NAME_LENGTH];
	426
	427	vfs_inode_get_name( inode_xp , name );
	428
	429	cxy_t inode_cxy = GET_CXY( inode_xp );
	430	vfs_inode_t * inode_ptr = GET_PTR( inode_xp );
	431
	432	vfs_inode_type_t type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) );
	433	uint32_t attr = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->attr ) );
	434	uint32_t size = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->size ) );
	435	uint32_t parents = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->links ) );
	436	mapper_t * mapper = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) );
	437	void * extend = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->extend ) );
	438
	439	printk("\n**** inode <%s>\n"
	440	" - type = %s\n"
	441	" - attr = %x\n"
	442	" - size = %d\n"
	443	" - parents = %d\n"
	444	" - cxy = %x\n"
	445	" - inode = %x\n"
	446	" - mapper = %x\n"
	447	" - extend = %x\n",
	448	name,
	449	vfs_inode_type_str( type ),
	450	attr,
	451	size,
	452	parents,
	453	inode_cxy,
	454	inode_ptr,
	455	mapper,
	456	extend );
	457
	458	} // end vfs_inode_display()
	459
	460
[204]	461	////////////////////////////////////////////////////////////////////////////////////////////
[602]	462	// VFS dentry descriptor related functions
[1]	463	//////////////////////////////////////////////////////////////////////////////////////////
	464
[23]	465	///////////////////////////////////////////////////
	466	error_t vfs_dentry_create( vfs_fs_type_t fs_type,
	467	char * name,
	468	xptr_t * dentry_xp )
[1]	469	{
	470	vfs_ctx_t * ctx; // context descriptor
	471	vfs_dentry_t * dentry; // dentry descriptor (to be allocated)
	472	kmem_req_t req; // request to kernel memory allocator
	473
[188]	474	// get pointer on context
[23]	475	if ( fs_type == FS_TYPE_FATFS ) ctx = &fs_context[FS_TYPE_FATFS];
	476	else if( fs_type == FS_TYPE_RAMFS ) ctx = &fs_context[FS_TYPE_RAMFS];
	477	else if( fs_type == FS_TYPE_DEVFS ) ctx = &fs_context[FS_TYPE_DEVFS];
[459]	478	else
[1]	479	{
	480	ctx = NULL;
[610]	481	return -1;
[1]	482	}
	483
	484	// get name length
	485	uint32_t length = strlen( name );
	486
[459]	487	if( length >= CONFIG_VFS_MAX_NAME_LENGTH ) return EINVAL;
[437]	488
[1]	489	// allocate memory for dentry descriptor
[635]	490	req.type = KMEM_KCM;
	491	req.order = bits_log2( sizeof(vfs_dentry_t) );
[1]	492	req.flags = AF_KERNEL \| AF_ZERO;
[635]	493	dentry = kmem_alloc( &req );
[1]	494
[610]	495	if( dentry == NULL )
	496	{
	497	printk("\n[ERROR] in %s : cannot allocate dentry descriptor\n",
	498	__FUNCTION__ );
	499	return -1;
	500	}
[437]	501
[1]	502	// initialize dentry descriptor
	503	dentry->ctx = ctx;
	504	dentry->length = length;
[602]	505	dentry->extend = NULL;
[1]	506	strcpy( dentry->name , name );
	507
[23]	508	// return extended pointer on dentry
[1]	509	*dentry_xp = XPTR( local_cxy , dentry );
	510
[438]	511	#if DEBUG_VFS_DENTRY_CREATE
[635]	512	thread_t * this = CURRENT_THREAD;
	513	uint32_t cycle = (uint32_t)hal_get_cycles();
[438]	514	if( DEBUG_VFS_DENTRY_CREATE < cycle )
[635]	515	printk("\n[%s] thread[%x,%x] created <%s> / dentry [%x,%x] / cycle %d\n",
[602]	516	__FUNCTION__, this->process->pid, this->trdid, name, local_cxy, dentry, cycle );
[433]	517	#endif
[296]	518
[1]	519	return 0;
	520
	521	} // end vfs_dentry_create()
	522
[602]	523	////////////////////////////////////////////////
	524	void vfs_dentry_destroy( vfs_dentry_t * dentry )
[1]	525	{
[459]	526	// release memory allocated to dentry
[1]	527	kmem_req_t req;
[635]	528	req.type = KMEM_KCM;
[1]	529	req.ptr = dentry;
	530	kmem_free( &req );
[459]	531
[602]	532	} // end vfs_dentry_destroy()
	533
	534
[1]	535	//////////////////////////////////////////////////////////////////////////////////////////
[602]	536	// VFS file descriptor related functions
[1]	537	//////////////////////////////////////////////////////////////////////////////////////////
	538
[23]	539	/////////////////////////////////////////////
	540	error_t vfs_file_create( vfs_inode_t * inode,
	541	uint32_t attr,
	542	xptr_t * file_xp )
	543	{
	544	vfs_file_t * file;
	545	kmem_req_t req;
	546
[568]	547	#if DEBUG_VFS_FILE_CREATE
[598]	548	thread_t * this = CURRENT_THREAD;
[568]	549	uint32_t cycle = (uint32_t)hal_get_cycles();
	550	if( DEBUG_VFS_OPEN < cycle )
[598]	551	printk("\n[%s] thread[%x,%x] enter for inode %x in cluster %x / cycle %d\n",
	552	__FUNCTION__, this->process->pid, this->trdid, inode, local_cxy, cycle );
[568]	553	#endif
	554
[23]	555	// allocate memory for new file descriptor
[635]	556	req.type = KMEM_KCM;
	557	req.order = bits_log2( sizeof(vfs_file_t) );
[23]	558	req.flags = AF_KERNEL \| AF_ZERO;
[635]	559	file = kmem_alloc( &req );
[23]	560
	561	if( file == NULL ) return ENOMEM;
	562
	563	// initializes new file descriptor
	564	file->gc = 0;
	565	file->type = inode->type;
	566	file->attr = attr;
	567	file->offset = 0;
[337]	568	file->refcount = 1;
[23]	569	file->inode = inode;
	570	file->ctx = inode->ctx;
	571	file->mapper = inode->mapper;
	572
[568]	573	remote_rwlock_init( XPTR( local_cxy , &file->lock ), LOCK_VFS_FILE );
[23]	574
	575	*file_xp = XPTR( local_cxy , file );
[459]	576
[568]	577	#if DEBUG_VFS_FILE_CREATE
	578	cycle = (uint32_t)hal_get_cycles();
[459]	579	if( DEBUG_VFS_OPEN < cycle )
[598]	580	printk("\n[%s] thread[%x,%x] created file %x in cluster %x / cycle %d\n",
	581	__FUNCTION__, this->process->pid, this->trdid, file, local_cxy, cycle );
[459]	582	#endif
	583
[23]	584	return 0;
	585
	586	} // end vfs_file_create()
	587
	588	///////////////////////////////////////////
	589	void vfs_file_destroy( vfs_file_t * file )
	590	{
	591	kmem_req_t req;
[635]	592	req.type = KMEM_KCM;
[23]	593	req.ptr = file;
	594	kmem_free( &req );
	595
[459]	596	#if DEBUG_VFS_CLOSE
[623]	597	char name[CONFIG_VFS_MAX_NAME_LENGTH];
	598	vfs_file_get_name( XPTR( local_cxy , file ) , name );
[598]	599	thread_t * this = CURRENT_THREAD;
[459]	600	uint32_t cycle = (uint32_t)hal_get_cycles();
	601	if( DEBUG_VFS_CLOSE < cycle )
[623]	602	printk("\n[%s] thread[%x,%x] deleted file <%s> in cluster %x / cycle %d\n",
	603	__FUNCTION__, this->process->pid, this->trdid, name, local_cxy, cycle );
[459]	604	#endif
	605
[23]	606	} // end vfs_file_destroy()
	607
	608
[1]	609	////////////////////////////////////////
	610	void vfs_file_count_up( xptr_t file_xp )
	611	{
	612	// get file cluster and local pointer
	613	cxy_t file_cxy = GET_CXY( file_xp );
[459]	614	vfs_file_t * file_ptr = GET_PTR( file_xp );
[1]	615
	616	// atomically increment count
	617	hal_remote_atomic_add( XPTR( file_cxy , &file_ptr->refcount ) , 1 );
	618	}
	619
	620	//////////////////////////////////////////
	621	void vfs_file_count_down( xptr_t file_xp )
	622	{
	623	// get file cluster and local pointer
	624	cxy_t file_cxy = GET_CXY( file_xp );
[459]	625	vfs_file_t * file_ptr = GET_PTR( file_xp );
[1]	626
	627	// atomically decrement count
	628	hal_remote_atomic_add( XPTR( file_cxy , &file_ptr->refcount ) , -1 );
	629	}
	630
[623]	631	///////////////////////////////////////
	632	void vfs_file_get_name( xptr_t file_xp,
	633	char * name )
	634	{
	635	// get cluster and local pointer on remote file
	636	vfs_file_t * file_ptr = GET_PTR( file_xp );
	637	cxy_t file_cxy = GET_CXY( file_xp );
	638
	639	// get pointers on remote inode
	640	vfs_inode_t * inode_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) );
	641	xptr_t inode_xp = XPTR( file_cxy , inode_ptr );
	642
	643	// call the relevant function
	644	vfs_inode_get_name( inode_xp , name );
	645	}
	646
	647
[23]	648	//////////////////////////////////////////////////////////////////////////////////////////
[602]	649	// "syscalls" API related functions
[23]	650	//////////////////////////////////////////////////////////////////////////////////////////
	651
[407]	652	//////////////////////////////////////
[610]	653	error_t vfs_open( xptr_t root_xp,
[407]	654	char * path,
[610]	655	xptr_t process_xp,
[407]	656	uint32_t flags,
	657	uint32_t mode,
	658	xptr_t * new_file_xp,
	659	uint32_t * new_file_id )
[1]	660	{
[610]	661	error_t error;
	662	xptr_t inode_xp; // extended pointer on target inode
	663	cxy_t inode_cxy; // inode cluster identifier
	664	vfs_inode_t * inode_ptr; // inode local pointer
	665	uint32_t file_attr; // file descriptor attributes
	666	uint32_t lookup_mode; // lookup working mode
	667	xptr_t file_xp; // extended pointer on created file descriptor
	668	uint32_t file_id; // created file descriptor index in reference fd_array
	669	xptr_t vfs_root_xp; // extended pointer on VFS root inode
	670	vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode
	671	cxy_t vfs_root_cxy; // VFS root inode cluster identifier
	672	xptr_t lock_xp; // extended pointer on Inode Tree lock
[1]	673
[602]	674	if( mode != 0 )
	675	{
	676	printk("\n[ERROR] in %s : the mode parameter is not supported yet\n" );
	677	return -1;
	678	}
	679
[610]	680	thread_t * this = CURRENT_THREAD;
	681	process_t * process = this->process;
	682
[647]	683	// compute lookup working mode
	684	lookup_mode = VFS_LOOKUP_OPEN;
	685	if( (flags & O_DIR ) ) lookup_mode \|= VFS_LOOKUP_DIR;
	686	if( (flags & O_CREAT ) ) lookup_mode \|= VFS_LOOKUP_CREATE;
	687	if( (flags & O_EXCL ) ) lookup_mode \|= VFS_LOOKUP_EXCL;
	688
[438]	689	#if DEBUG_VFS_OPEN
[433]	690	uint32_t cycle = (uint32_t)hal_get_cycles();
[438]	691	if( DEBUG_VFS_OPEN < cycle )
[610]	692	printk("\n[%s] thread[%x,%x] enter for <%s> / root_inode (%x,%x) / cycle %d\n",
	693	__FUNCTION__, process->pid, this->trdid, path, GET_CXY(root_xp), GET_PTR(root_xp), cycle );
[433]	694	#endif
[101]	695
[23]	696	// compute attributes for the created file
	697	file_attr = 0;
[407]	698	if( (flags & O_RDONLY ) == 0 ) file_attr \|= FD_ATTR_WRITE_ENABLE;
	699	if( (flags & O_WRONLY ) == 0 ) file_attr \|= FD_ATTR_READ_ENABLE;
[23]	700	if( (flags & O_SYNC ) ) file_attr \|= FD_ATTR_SYNC;
	701	if( (flags & O_APPEND ) ) file_attr \|= FD_ATTR_APPEND;
	702	if( (flags & O_CLOEXEC) ) file_attr \|= FD_ATTR_CLOSE_EXEC;
[1]	703
[610]	704	// build extended pointer on lock protecting Inode Tree
	705	vfs_root_xp = process->vfs_root_xp;
	706	vfs_root_ptr = GET_PTR( vfs_root_xp );
	707	vfs_root_cxy = GET_CXY( vfs_root_xp );
	708	lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock );
	709
	710	// take lock protecting Inode Tree in read mode
	711	remote_rwlock_rd_acquire( lock_xp );
	712
[23]	713	// get extended pointer on target inode
[610]	714	error = vfs_lookup( root_xp,
	715	path,
	716	lookup_mode,
	717	&inode_xp,
	718	NULL );
[23]	719
[610]	720	// release lock protecting Inode Tree
	721	remote_rwlock_rd_release( lock_xp );
[23]	722
[610]	723	if( error )
	724	{
	725	printk("\n[ERROR] in %s : cannot get inode <%s>\n",
	726	__FUNCTION__ , path );
	727	return -1;
	728	}
	729
[23]	730	// get target inode cluster and local pointer
	731	inode_cxy = GET_CXY( inode_xp );
[473]	732	inode_ptr = GET_PTR( inode_xp );
[23]	733
[610]	734	#if (DEBUG_VFS_OPEN & 1)
	735	cycle = (uint32_t)hal_get_cycles();
	736	if( DEBUG_VFS_OPEN < cycle )
	737	printk("\n[%s] thread[%x,%x] found inode(%x,%x) for <%s>\n",
	738	__FUNCTION__, process->pid, this->trdid, inode_cxy, inode_ptr, path );
	739	#endif
	740
[23]	741	// create a new file descriptor in cluster containing inode
	742	if( inode_cxy == local_cxy ) // target cluster is local
[1]	743	{
[23]	744	error = vfs_file_create( inode_ptr , file_attr , &file_xp );
[1]	745	}
[23]	746	else // target cluster is remote
	747	{
	748	rpc_vfs_file_create_client( inode_cxy , inode_ptr , file_attr , &file_xp , &error );
	749	}
[1]	750
[23]	751	if( error ) return error;
[1]	752
[610]	753	#if (DEBUG_VFS_OPEN & 1)
	754	cycle = (uint32_t)hal_get_cycles();
	755	if( DEBUG_VFS_OPEN < cycle )
	756	printk("\n[%s] thread[%x,%x] created file descriptor (%x,%x) for <%s>\n",
	757	__FUNCTION__, process->pid, this->trdid, GET_CXY(file_xp), GET_PTR(file_xp), path );
	758	#endif
	759
[407]	760	// allocate and register a new file descriptor index in reference process
[610]	761	error = process_fd_register( process_xp , file_xp , &file_id );
[1]	762
[23]	763	if( error ) return error;
[1]	764
[438]	765	#if DEBUG_VFS_OPEN
[433]	766	cycle = (uint32_t)hal_get_cycles();
[438]	767	if( DEBUG_VFS_OPEN < cycle )
[626]	768	printk("\n[%s] thread[%x,%x] exit for <%s> / fdid %d / cxy %x / cycle %d\n",
[610]	769	__FUNCTION__, process->pid, this->trdid, path, file_id, GET_CXY( file_xp ), cycle );
[433]	770	#endif
[238]	771
[23]	772	// success
	773	*new_file_xp = file_xp;
	774	*new_file_id = file_id;
	775	return 0;
[1]	776
[23]	777	} // end vfs_open()
	778
[407]	779	//////////////////////////////////////
	780	int vfs_user_move( bool_t to_buffer,
	781	xptr_t file_xp,
	782	void * buffer,
	783	uint32_t size )
[23]	784	{
	785	cxy_t file_cxy; // remote file descriptor cluster
	786	vfs_file_t * file_ptr; // remote file descriptor local pointer
	787	vfs_inode_type_t inode_type;
	788	uint32_t file_offset; // current offset in file
	789	mapper_t * mapper;
	790	error_t error;
	791
[602]	792	// check argument
[625]	793	assert( (file_xp != XPTR_NULL), "file_xp == XPTR_NULL" );
[602]	794
[23]	795	// get cluster and local pointer on remote file descriptor
	796	file_cxy = GET_CXY( file_xp );
[473]	797	file_ptr = GET_PTR( file_xp );
[23]	798
	799	// get inode type from remote file descriptor
[568]	800	inode_type = hal_remote_l32( XPTR( file_cxy , &file_ptr->type ) );
[23]	801
[602]	802	// check inode type
[625]	803	assert( (inode_type == INODE_TYPE_FILE), "bad inode type" );
[23]	804
[628]	805	// get mapper pointer and file offset from file descriptor
	806	file_offset = hal_remote_l32( XPTR( file_cxy , &file_ptr->offset ) );
	807	mapper = hal_remote_lpt( XPTR( file_cxy , &file_ptr->mapper ) );
	808
[626]	809	#if DEBUG_VFS_USER_MOVE
	810	char name[CONFIG_VFS_MAX_NAME_LENGTH];
	811	uint32_t cycle = (uint32_t)hal_get_cycles();
	812	thread_t * this = CURRENT_THREAD;
	813	vfs_inode_t * inode = hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) );
	814	vfs_inode_get_name( XPTR( file_cxy , inode ) , name );
	815	if( cycle > DEBUG_VFS_USER_MOVE )
	816	{
	817	if( to_buffer )
[628]	818	printk("\n[%s] thread[%x,%x] enter / %d bytes / map(%s) -> buf(%x) / offset %d / cycle %d\n",
	819	__FUNCTION__ , this->process->pid, this->trdid, size, name, buffer, file_offset, cycle );
[626]	820	else
[628]	821	printk("\n[%s] thread[%x,%x] enter / %d bytes / buf(%x) -> map(%s) / offset %d / cycle %d\n",
	822	__FUNCTION__ , this->process->pid, this->trdid, size, buffer, name, file_offset, cycle );
[626]	823	}
	824	#endif
	825
[407]	826	// move data between mapper and buffer
[610]	827	error = mapper_move_user( XPTR( file_cxy , mapper ),
	828	to_buffer,
	829	file_offset,
	830	buffer,
	831	size );
[602]	832	if( error )
	833	{
[625]	834	printk("\n[ERROR] in %s : cannot move data", __FUNCTION__ );
[602]	835	return -1;
	836	}
	837
[625]	838	// update file offset in file descriptor
	839	hal_remote_atomic_add( XPTR( file_cxy , &file_ptr->offset ) , size );
	840
	841	#if DEBUG_VFS_USER_MOVE
[626]	842	cycle = (uint32_t)hal_get_cycles();
[625]	843	if( cycle > DEBUG_VFS_USER_MOVE )
	844	{
	845	if( to_buffer )
[628]	846	printk("\n[%s] thread[%x,%x] exit / cycle %d\n",
	847	__FUNCTION__ , this->process->pid, cycle );
[625]	848	else
[628]	849	printk("\n[%s] thread[%x,%x] exit / cycle %d\n",
	850	__FUNCTION__ , this->process->pid, cycle );
[625]	851	}
	852	#endif
	853
[602]	854	return size;
	855
[313]	856	} // end vfs_user_move()
[23]	857
[317]	858	////////////////////////////////////////////
	859	error_t vfs_kernel_move( bool_t to_buffer,
	860	xptr_t file_xp,
	861	xptr_t buffer_xp,
	862	uint32_t size )
	863	{
	864	cxy_t file_cxy; // remote file descriptor cluster
	865	vfs_file_t * file_ptr; // remote file descriptor local pointer
[602]	866	vfs_inode_type_t inode_type; // remote file type
[317]	867	uint32_t file_offset; // current offset in file
[602]	868	mapper_t * mapper_ptr; // remote mapper local pointer
	869	xptr_t mapper_xp; // remote mapper extended pointer
[317]	870	error_t error;
	871
[602]	872	// check argument
[625]	873	assert( (file_xp != XPTR_NULL) , "file_xp == XPTR_NULL" );
[602]	874
[317]	875	// get cluster and local pointer on remote file descriptor
	876	file_cxy = GET_CXY( file_xp );
[473]	877	file_ptr = GET_PTR( file_xp );
[317]	878
	879	// get inode type from remote file descriptor
[568]	880	inode_type = hal_remote_l32( XPTR( file_cxy , &file_ptr->type ) );
[610]	881
[625]	882	// check inode type
	883	assert( (inode_type == INODE_TYPE_FILE), "bad file type" );
[317]	884
[625]	885	// get mapper pointers and file offset from file descriptor
	886	file_offset = hal_remote_l32( XPTR( file_cxy , &file_ptr->offset ) );
	887	mapper_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->mapper ) );
	888	mapper_xp = XPTR( file_cxy , mapper_ptr );
	889
	890	// move data between mapper and buffer
	891	error = mapper_move_kernel( mapper_xp,
	892	to_buffer,
	893	file_offset,
	894	buffer_xp,
	895	size );
	896	if( error )
[317]	897	{
[625]	898	printk("\n[ERROR] in %s : cannot move data", __FUNCTION__ );
[317]	899	return -1;
	900	}
[602]	901
[625]	902	#if DEBUG_VFS_KERNEL_MOVE
	903	char name[CONFIG_VFS_MAX_NAME_LENGTH];
	904	uint32_t cycle = (uint32_t)hal_get_cycles();
	905	thread_t * this = CURRENT_THREAD;
	906	cxy_t buffer_cxy = GET_CXY( buffer_xp );
	907	void * buffer_ptr = GET_PTR( buffer_xp );
	908	vfs_inode_t * inode = hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) );
	909	vfs_inode_get_name( XPTR( file_cxy , inode ) , name );
	910	if( cycle > DEBUG_VFS_KERNEL_MOVE )
	911	{
	912	if( to_buffer )
	913	printk("\n[%s] thread[%x,%x] moves %d bytes from <%s> mapper to buffer(%x,%x) / cycle %d\n",
	914	__FUNCTION__ , this->process->pid, this->trdid, size, name, buffer_cxy, buffer_ptr );
	915	else
	916	printk("\n[%s] thread[%x,%x] moves %d bytes from buffer(%x,%x) to <%s> mapper / cycle %d\n",
	917	__FUNCTION__ , this->process->pid, this->trdid, size, buffer_cxy, buffer_ptr, name );
	918	}
	919	#endif
	920
[602]	921	return 0;
	922
[317]	923	} // end vfs_kernel_move()
	924
[23]	925	//////////////////////////////////////
	926	error_t vfs_lseek( xptr_t file_xp,
	927	uint32_t offset,
	928	uint32_t whence,
	929	uint32_t * new_offset )
	930	{
[266]	931	xptr_t offset_xp;
	932	xptr_t lock_xp;
[602]	933	xptr_t size_xp;
[266]	934	cxy_t file_cxy;
	935	vfs_file_t * file_ptr;
	936	vfs_inode_t * inode_ptr;
	937	uint32_t new;
	938
[651]	939	// check arguments
[625]	940	assert( (file_xp != XPTR_NULL) , "file_xp == XPTR_NULL" );
[651]	941	assert( (new_offset != NULL ) , "new_offset == NULL" );
[266]	942
	943	// get cluster and local pointer on remote file descriptor
	944	file_cxy = GET_CXY( file_xp );
[473]	945	file_ptr = GET_PTR( file_xp );
[266]	946
[602]	947	// get local pointer on remote inode
	948	inode_ptr = (vfs_inode_t *)hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) );
	949
	950	// build extended pointers on lock, offset and size
[266]	951	offset_xp = XPTR( file_cxy , &file_ptr->offset );
	952	lock_xp = XPTR( file_cxy , &file_ptr->lock );
[602]	953	size_xp = XPTR( file_cxy , &inode_ptr->size );
[266]	954
	955	// take file descriptor lock
[568]	956	remote_rwlock_wr_acquire( lock_xp );
[266]	957
	958	if ( whence == SEEK_CUR ) // new = current + offset
	959	{
[568]	960	new = hal_remote_l32( offset_xp ) + offset;
[266]	961	}
	962	else if ( whence == SEEK_SET ) // new = offset
	963	{
	964	new = offset;
	965	}
	966	else if ( whence == SEEK_END ) // new = size + offset
	967	{
[602]	968	new = hal_remote_l32( size_xp ) + offset;
[266]	969	}
	970	else
	971	{
	972	printk("\n[ERROR] in %s : illegal whence value\n", __FUNCTION__ );
[568]	973	remote_rwlock_wr_release( lock_xp );
[266]	974	return -1;
	975	}
	976
[602]	977	#if DEBUG_VFS_LSEEK
	978	uint32_t cycle = (uint32_t)hal_get_cycles();
	979	thread_t * this = CURRENT_THREAD;
	980	char name[CONFIG_VFS_MAX_NAME_LENGTH];
	981	vfs_inode_get_name( XPTR( file_cxy , inode_ptr ) , name );
	982	if( cycle > DEBUG_VFS_LSEEK )
	983	printk("\n[%s] thread[%x,%x] for <%s> / new offset %d / cycle %d\n",
	984	__FUNCTION__ , this->process->pid, this->trdid, name, new, cycle );
	985	#endif
	986
[266]	987	// set new offset
[568]	988	hal_remote_s32( offset_xp , new );
[266]	989
	990	// release file descriptor lock
[568]	991	remote_rwlock_wr_release( lock_xp );
[266]	992
	993	// success
[651]	994	*new_offset = new;
[1]	995	return 0;
	996
[23]	997	} // vfs_lseek()
	998
[623]	999	////////////////////////////////////
[23]	1000	error_t vfs_close( xptr_t file_xp,
	1001	uint32_t file_id )
[1]	1002	{
[623]	1003	cxy_t file_cxy; // cluster containing the file descriptor.
	1004	vfs_file_t * file_ptr; // local ponter on file descriptor
	1005	cxy_t owner_cxy; // process owner cluster
	1006	pid_t pid; // process identifier
	1007	lpid_t lpid; // process local index
	1008	xptr_t root_xp; // root of xlist (processes , or dentries)
	1009	xptr_t lock_xp; // lock protecting the xlist
	1010	xptr_t iter_xp; // iterator on xlist
	1011	mapper_t * mapper_ptr; // local pointer on associated mapper
	1012	vfs_inode_t * inode_ptr; // local pointer on associated inode
	1013	uint32_t size; // current file size (from inode descriptor)
	1014	error_t error;
[459]	1015
[623]	1016	char name[CONFIG_VFS_MAX_NAME_LENGTH]; // file name
[23]	1017
[623]	1018	// check argument
[625]	1019	assert( (file_xp != XPTR_NULL) , "file_xp is XPTR_NULL" );
[623]	1020
[23]	1021	thread_t * this = CURRENT_THREAD;
	1022	process_t * process = this->process;
[623]	1023	cluster_t * cluster = LOCAL_CLUSTER;
[23]	1024
[623]	1025	// get file name
	1026	vfs_file_get_name( file_xp , name );
	1027
[459]	1028	#if DEBUG_VFS_CLOSE
	1029	uint32_t cycle = (uint32_t)hal_get_cycles();
	1030	if( DEBUG_VFS_CLOSE < cycle )
[623]	1031	printk("\n[%s] thread[%x,%x] enter for <%s> / cycle %d\n",
	1032	__FUNCTION__, process->pid, this->trdid, name, cycle );
[459]	1033	#endif
[1]	1034
[623]	1035	// get cluster and local pointer on remote file descriptor
	1036	file_cxy = GET_CXY( file_xp );
	1037	file_ptr = GET_PTR( file_xp );
[23]	1038
[623]	1039	//////// 1) update all dirty pages from mapper to device
[23]	1040
[633]	1041	// get local pointer on mapper associated to file
[623]	1042	mapper_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->mapper ) );
[23]	1043
[623]	1044	// copy all dirty pages from mapper to device
	1045	if( file_cxy == local_cxy )
	1046	{
	1047	error = mapper_sync( mapper_ptr );
	1048	}
	1049	else
	1050	{
	1051	rpc_mapper_sync_client( file_cxy,
	1052	mapper_ptr,
	1053	&error );
	1054	}
[459]	1055
[623]	1056	if( error )
	1057	{
	1058	printk("\n[ERROR] in %s : cannot synchronise dirty pages for <%s>\n",
	1059	__FUNCTION__, name );
	1060	return -1;
	1061	}
[23]	1062
[623]	1063	#if DEBUG_VFS_CLOSE
	1064	if( DEBUG_VFS_CLOSE < cycle )
	1065	printk("\n[%s] thread[%x,%x] synchronised mapper of <%s> to device\n",
	1066	__FUNCTION__, process->pid, this->trdid, name );
	1067	#endif
	1068
[625]	1069	//////// 2) update file size in all parent directory mapper(s) and update device
[623]	1070
[633]	1071	// get local pointer on remote inode
[623]	1072	inode_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ) );
	1073
	1074	// get file size from remote inode
	1075	size = hal_remote_l32( XPTR( file_cxy , &inode_ptr->size ) );
	1076
	1077	// get root of list of parents dentry
	1078	root_xp = XPTR( file_cxy , &inode_ptr->parents );
	1079
	1080	// loop on all parents
[23]	1081	XLIST_FOREACH( root_xp , iter_xp )
[1]	1082	{
[623]	1083	// get pointers on parent directory dentry
	1084	xptr_t parent_dentry_xp = XLIST_ELEMENT( iter_xp , vfs_dentry_t , parents );
	1085	cxy_t parent_cxy = GET_CXY( parent_dentry_xp );
	1086	vfs_dentry_t * parent_dentry_ptr = GET_PTR( parent_dentry_xp );
[1]	1087
[623]	1088	// get local pointer on parent directory inode
	1089	vfs_inode_t * parent_inode_ptr = hal_remote_lpt( XPTR( parent_cxy,
	1090	&parent_dentry_ptr->parent ) );
	1091
	1092	// get local pointer on parent directory mapper
	1093	mapper_t * parent_mapper_ptr = hal_remote_lpt( XPTR( parent_cxy,
	1094	&parent_inode_ptr->mapper ) );
	1095
	1096	// update dentry size in parent directory mapper
	1097	if( parent_cxy == local_cxy )
	1098	{
	1099	error = vfs_fs_update_dentry( parent_inode_ptr,
	1100	parent_dentry_ptr,
	1101	size );
	1102	}
	1103	else
	1104	{
	1105	rpc_vfs_fs_update_dentry_client( parent_cxy,
	1106	parent_inode_ptr,
	1107	parent_dentry_ptr,
	1108	size,
	1109	&error );
	1110	}
	1111
	1112	if( error )
	1113	{
	1114	printk("\n[ERROR] in %s : cannot update size in parent\n",
	1115	__FUNCTION__ );
	1116	return -1;
	1117	}
	1118
	1119	#if DEBUG_VFS_CLOSE
	1120	char parent_name[CONFIG_VFS_MAX_NAME_LENGTH];
	1121	vfs_inode_get_name( XPTR( parent_cxy , parent_inode_ptr ) , parent_name );
[459]	1122	if( DEBUG_VFS_CLOSE < cycle )
[625]	1123	printk("\n[%s] thread[%x,%x] updated <%s> in <%s> / size = %d bytes\n",
	1124	__FUNCTION__, process->pid, this->trdid, name, parent_name, size );
[459]	1125	#endif
[23]	1126
[623]	1127	// copy all dirty pages from parent mapper to device
	1128	if( parent_cxy == local_cxy )
	1129	{
	1130	error = mapper_sync( parent_mapper_ptr );
	1131	}
	1132	else
	1133	{
	1134	rpc_mapper_sync_client( parent_cxy,
	1135	parent_mapper_ptr,
	1136	&error );
	1137	}
[459]	1138
[623]	1139	if( error )
	1140	{
	1141	printk("\n[ERROR] in %s : cannot synchronise parent mapper to device\n",
	1142	__FUNCTION__ );
	1143	return -1;
	1144	}
[459]	1145
[623]	1146	#if DEBUG_VFS_CLOSE
	1147	if( DEBUG_VFS_CLOSE < cycle )
	1148	printk("\n[%s] thread[%x,%x] synchonized mapper of parent <%s> to device\n",
	1149	__FUNCTION__, process->pid, this->trdid, parent_name );
	1150	#endif
[459]	1151
[623]	1152	}
	1153
	1154	//////// 3) loop on the process copies to reset all fd_array[file_id] entries
	1155
	1156	// get owner process cluster and lpid
	1157	pid = process->pid;
	1158	owner_cxy = CXY_FROM_PID( pid );
	1159	lpid = LPID_FROM_PID( pid );
	1160
	1161	// get extended pointers on copies root and lock
	1162	root_xp = XPTR( owner_cxy , &cluster->pmgr.copies_root[lpid] );
	1163	lock_xp = XPTR( owner_cxy , &cluster->pmgr.copies_lock[lpid] );
	1164
	1165	// take the lock protecting the list of copies
	1166	remote_queuelock_acquire( lock_xp );
	1167
	1168	XLIST_FOREACH( root_xp , iter_xp )
	1169	{
	1170	xptr_t process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list );
	1171	cxy_t process_cxy = GET_CXY( process_xp );
	1172	process_t * process_ptr = GET_PTR( process_xp );
	1173
	1174	xptr_t entry_xp = XPTR( process_cxy , &process_ptr->fd_array.array[file_id] );
[568]	1175	hal_remote_s64( entry_xp , XPTR_NULL );
[459]	1176	vfs_file_count_down( file_xp );
[124]	1177	hal_fence();
[23]	1178	}
	1179
[459]	1180	// release the lock protecting the list of copies
[568]	1181	remote_queuelock_release( lock_xp );
[459]	1182
[623]	1183	#if DEBUG_VFS_CLOSE
[459]	1184	if( DEBUG_VFS_CLOSE < cycle )
[625]	1185	printk("\n[%s] thread[%x,%x] reset all fd-array copies for <%s>\n",
[623]	1186	__FUNCTION__, process->pid, this->trdid, name );
[459]	1187	#endif
	1188
[623]	1189	//////// 4) release memory allocated to file descriptor in remote cluster
[459]	1190
[23]	1191	if( file_cxy == local_cxy ) // file cluster is local
[1]	1192	{
[23]	1193	vfs_file_destroy( file_ptr );
	1194	}
	1195	else // file cluster is local
	1196	{
	1197	rpc_vfs_file_destroy_client( file_cxy , file_ptr );
	1198	}
[1]	1199
[459]	1200	#if DEBUG_VFS_CLOSE
	1201	cycle = (uint32_t)hal_get_cycles();
	1202	if( DEBUG_VFS_CLOSE < cycle )
[625]	1203	printk("\n[%s] thread[%x,%x] exit / closed <%s> in process %x / cycle %d\n",
	1204	__FUNCTION__, process->pid, this->trdid, name, process->pid, cycle );
[459]	1205	#endif
	1206
[23]	1207	return 0;
[1]	1208
[23]	1209	} // end vfs_close()
[1]	1210
	1211	////////////////////////////////////
[610]	1212	error_t vfs_mkdir( xptr_t root_xp,
	1213	char * path,
	1214	uint32_t rights )
	1215	{
	1216	error_t error;
	1217	xptr_t vfs_root_xp; // extended pointer on VFS root inode
	1218	vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode
	1219	cxy_t vfs_root_cxy; // VFS root inode cluster identifier
	1220	xptr_t lock_xp; // extended pointer on lock protecting Inode Tree
[611]	1221	xptr_t inode_xp; // extended pointer on new directory inode
	1222	vfs_inode_t * inode_ptr; // local pointer on new directory inode
	1223	cxy_t inode_cxy; // new directory inode cluster identifier
[610]	1224	xptr_t dentry_xp; // extended pointer on new dentry
[611]	1225	vfs_dentry_t * dentry_ptr; // new dentry local pointer
	1226	xptr_t parent_xp; // extended pointer on parent inode
	1227	vfs_inode_t * parent_ptr; // local pointer on parent inode
	1228	cxy_t parent_cxy; // parent inode cluster identifier
	1229	vfs_ctx_t * parent_ctx_ptr; // local pointer on parent inode context
	1230	uint32_t parent_fs_type; // parent inode file system type
[610]	1231
	1232	xptr_t parents_root_xp; // extended pointer on parents field in inode (root)
	1233	xptr_t parents_entry_xp; // extended pointer on parents field in dentry
	1234	xptr_t children_xhtab_xp; // extended pointer on children field in inode (root)
	1235	xptr_t children_entry_xp; // extended pointer on children field in dentry
	1236
	1237	char last_name[CONFIG_VFS_MAX_NAME_LENGTH];
	1238
	1239	thread_t * this = CURRENT_THREAD;
	1240	process_t * process = this->process;
	1241
	1242	#if DEBUG_VFS_MKDIR
	1243	char root_name[CONFIG_VFS_MAX_NAME_LENGTH];
	1244	vfs_inode_get_name( root_xp , root_name );
	1245	uint32_t cycle = (uint32_t)hal_get_cycles();
	1246	if( DEBUG_VFS_MKDIR < cycle )
	1247	printk("\n[%s] thread[%x,%x] enter / root <%s> / path <%s> / cycle %d\n",
	1248	__FUNCTION__, process->pid, this->trdid, root_name, path, cycle );
	1249	#endif
	1250
	1251	// build extended pointer on lock protecting Inode Tree (in VFS root inode)
	1252	vfs_root_xp = process->vfs_root_xp;
	1253	vfs_root_ptr = GET_PTR( vfs_root_xp );
	1254	vfs_root_cxy = GET_CXY( vfs_root_xp );
	1255	lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock );
	1256
	1257	// take the lock protecting Inode Tree in write mode
	1258	remote_rwlock_wr_acquire( lock_xp );
	1259
	1260	// 1. get pointers on parent inode
	1261	error = vfs_lookup( root_xp,
	1262	path,
	1263	VFS_LOOKUP_DIR \| VFS_LOOKUP_PARENT,
	1264	&parent_xp,
	1265	last_name );
	1266	if( error )
	1267	{
	1268	remote_rwlock_wr_release( lock_xp );
	1269	printk("\n[ERROR] in %s : cannot get parent inode for <%s>\n",
	1270	__FUNCTION__, path );
	1271	return -1;
	1272	}
	1273
	1274	// get parent inode cluster and local pointer
	1275	parent_cxy = GET_CXY( parent_xp );
	1276	parent_ptr = GET_PTR( parent_xp );
	1277
	1278	#if( DEBUG_VFS_MKDIR & 1 )
	1279	if( DEBUG_VFS_MKDIR < cycle )
	1280	printk("\n[%s] thread[%x,%x] get parent inode (%x,%x) for <%s>\n",
	1281	__FUNCTION__, process->pid, this->trdid, parent_cxy, parent_ptr, path );
	1282	#endif
	1283
	1284	// get parent inode context, and FS type
	1285	parent_ctx_ptr = hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->ctx ) );
	1286	parent_fs_type = hal_remote_l32( XPTR( parent_cxy , &parent_ctx_ptr->type ) );
	1287
	1288	// 2. create one new dentry in parent cluster
	1289	if( parent_cxy == local_cxy )
	1290	{
	1291	error = vfs_dentry_create( parent_fs_type,
	1292	last_name,
	1293	&dentry_xp );
	1294	}
	1295	else
	1296	{
	1297	rpc_vfs_dentry_create_client( parent_cxy,
	1298	parent_fs_type,
	1299	last_name,
	1300	&dentry_xp,
	1301	&error );
	1302	}
	1303
	1304	if( error )
	1305	{
	1306	remote_rwlock_wr_release( lock_xp );
	1307	printk("\n[ERROR] in %s : cannot create new dentry in cluster %x for <%s>\n",
	1308	__FUNCTION__, parent_cxy, path );
	1309	return -1;
	1310	}
	1311
	1312	// get local pointer on dentry
	1313	dentry_ptr = GET_PTR( dentry_xp );
	1314
	1315	#if( DEBUG_VFS_MKDIR & 1 )
	1316	if( DEBUG_VFS_MKDIR < cycle )
	1317	printk("\n[%s] thread[%x,%x] created new dentry (%x,%x) for <%s>\n",
	1318	__FUNCTION__, process->pid, this->trdid, parent_cxy, dentry_ptr, path );
	1319	#endif
	1320
[611]	1321	// 3. create new directory inode
[610]	1322	// TODO : define attr / uid / gid
	1323	uint32_t attr = 0;
	1324	uint32_t uid = 0;
	1325	uint32_t gid = 0;
	1326
	1327	// select a target cluster for new inode
	1328	inode_cxy = cluster_random_select();
	1329
[611]	1330	if( inode_cxy == local_cxy ) // target cluster is local
[610]	1331	{
	1332	error = vfs_inode_create( parent_fs_type,
	1333	attr,
	1334	rights,
	1335	uid,
	1336	gid,
	1337	&inode_xp );
	1338	}
[611]	1339	else // target cluster is remote
[610]	1340	{
	1341	rpc_vfs_inode_create_client( inode_cxy,
	1342	parent_fs_type,
	1343	attr,
	1344	rights,
	1345	uid,
	1346	gid,
	1347	&inode_xp,
	1348	&error );
	1349	}
	1350
	1351	if( error )
	1352	{
[611]	1353	remote_rwlock_wr_release( lock_xp );
[610]	1354	printk("\n[ERROR] in %s : cannot create new inode in cluster %x for <%s>\n",
	1355	__FUNCTION__ , inode_cxy , path );
	1356	if( parent_cxy == local_cxy ) vfs_dentry_destroy( dentry_ptr );
	1357	else rpc_vfs_dentry_destroy_client( parent_cxy , dentry_ptr );
	1358	return -1;
	1359	}
	1360
	1361	// get new inode local pointer
	1362	inode_ptr = GET_PTR( inode_xp );
[623]	1363
	1364	// update inode "type" field
	1365	hal_remote_s32( XPTR( inode_cxy , &inode_ptr->type ) , INODE_TYPE_DIR );
[610]	1366
	1367	#if(DEBUG_VFS_MKDIR & 1)
	1368	if( DEBUG_VFS_MKDIR < cycle )
	1369	printk("\n[%s] thread[%x,%x] created new inode (%x,%x) for <%s>\n",
	1370	__FUNCTION__ , process->pid, this->trdid, inode_cxy, inode_ptr, path );
	1371	#endif
	1372
	1373	// 4. register dentry in new inode list of parents
	1374	parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents );
	1375	parents_entry_xp = XPTR( parent_cxy , &dentry_ptr->parents );
	1376	xlist_add_first( parents_root_xp , parents_entry_xp );
	1377	hal_remote_atomic_add( XPTR( inode_cxy , &inode_ptr->links ) , 1 );
	1378
	1379	// 5. register dentry in parent inode
	1380	children_xhtab_xp = XPTR( parent_cxy , &parent_ptr->children );
	1381	children_entry_xp = XPTR( parent_cxy , &dentry_ptr->children );
	1382	xhtab_insert( children_xhtab_xp , last_name , children_entry_xp );
	1383
	1384	// 6. update "parent" and "child_xp" fields in dentry
	1385	hal_remote_s64( XPTR( parent_cxy , &dentry_ptr->child_xp ) , inode_xp );
	1386	hal_remote_spt( XPTR( parent_cxy , &dentry_ptr->parent ) , parent_ptr );
	1387
	1388	#if(DEBUG_VFS_MKDIR & 1)
	1389	if( DEBUG_VFS_MKDIR < cycle )
	1390	printk("\n[%s] thread[%x,%x] updated Inode Tree for <%s>\n",
	1391	__FUNCTION__, process->pid, this->trdid, path );
	1392	#endif
	1393
[611]	1394	// 7. create the two special dentries <.> and <..> in new directory
	1395	// both the new directory mapper, and the Inode Tree are updated
	1396	error = vfs_add_special_dentries( inode_xp,
	1397	parent_xp );
	1398
	1399	if( error )
	1400	{
	1401	remote_rwlock_wr_release( lock_xp );
	1402	printk("\n[ERROR] in %s : cannot create new inode in cluster %x for <%s>\n",
	1403	__FUNCTION__ , inode_cxy , path );
	1404	if( parent_cxy == local_cxy ) vfs_dentry_destroy( dentry_ptr );
	1405	else rpc_vfs_dentry_destroy_client( parent_cxy , dentry_ptr );
	1406	return -1;
	1407	}
	1408
[610]	1409	// release the lock protecting Inode Tree
	1410	remote_rwlock_wr_release( lock_xp );
	1411
[611]	1412	// 8. update parent directory mapper
[610]	1413	// and synchronize the parent directory on IOC device
	1414	if (parent_cxy == local_cxy)
	1415	{
	1416	error = vfs_fs_add_dentry( parent_ptr,
	1417	dentry_ptr );
	1418	}
	1419	else
	1420	{
	1421	rpc_vfs_fs_add_dentry_client( parent_cxy,
	1422	parent_ptr,
	1423	dentry_ptr,
	1424	&error );
	1425	}
	1426
	1427	if( error )
	1428	{
	1429	printk("\n[ERROR] in %s : cannot update parent directory for <%s>\n",
	1430	__FUNCTION__, path );
	1431	return -1;
	1432	}
	1433
	1434	#if(DEBUG_VFS_MKDIR & 1)
	1435	if( DEBUG_VFS_MKDIR < cycle )
	1436	printk("\n[%s] thread[%x,%x] updated parent dir (mapper and IOC) for <%s>\n",
	1437	__FUNCTION__, process->pid, this->trdid, path );
	1438	#endif
	1439
	1440	return 0;
	1441
	1442	} // end vfs_mkdir()
	1443
	1444	///////////////////////////////////////
	1445	error_t vfs_link( xptr_t old_root_xp,
	1446	char * old_path,
	1447	xptr_t new_root_xp,
	1448	char * new_path )
	1449	{
	1450	error_t error;
	1451	xptr_t vfs_root_xp; // extended pointer on VFS root inode
	1452	vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode
	1453	cxy_t vfs_root_cxy; // VFS root inode cluster identifier
	1454	xptr_t lock_xp; // extended pointer on lock protecting Inode Tree
	1455	xptr_t inode_xp; // extended pointer on target inode
	1456	vfs_inode_t * inode_ptr; // local pointer on target inode
	1457	cxy_t inode_cxy; // target inode cluster identifier
	1458	uint32_t inode_type; // target inode type
	1459	vfs_ctx_t * inode_ctx_ptr; // local pointer on target inode context
	1460	uint32_t inode_fs_type; // target inode file system type
	1461	xptr_t dentry_xp; // extended pointer on new dentry
	1462	vfs_dentry_t * dentry_ptr; // target dentry local pointer
	1463	xptr_t new_parent_xp; // extended pointer on new parent inode
	1464	vfs_inode_t * new_parent_ptr; // local pointer on new parent inode
	1465	cxy_t new_parent_cxy; // new parent inode cluster identifier
	1466
	1467	xptr_t parents_root_xp; // extended pointer on parents field in inode (root)
	1468	xptr_t parents_entry_xp; // extended pointer on parents field in dentry
	1469	xptr_t children_xhtab_xp; // extended pointer on children field in inode (root)
	1470	xptr_t children_entry_xp; // extended pointer on children field in dentry
	1471
	1472	char new_name[CONFIG_VFS_MAX_NAME_LENGTH];
	1473
	1474	thread_t * this = CURRENT_THREAD;
	1475	process_t * process = this->process;
	1476
	1477	#if DEBUG_VFS_LINK
	1478	char old_root_name[CONFIG_VFS_MAX_NAME_LENGTH];
	1479	char new_root_name[CONFIG_VFS_MAX_NAME_LENGTH];
	1480	vfs_inode_get_name( old_root_xp , old_root_name );
	1481	vfs_inode_get_name( new_root_xp , new_root_name );
	1482	uint32_t cycle = (uint32_t)hal_get_cycles();
	1483	if( DEBUG_VFS_LINK < cycle )
	1484	printk("\n[%s] thread[%x,%x] enter / old_root <%s> / old_path <%s> / "
	1485	"new_root <%s> / new_path <%s> / cycle %d\n",
	1486	__FUNCTION__, process->pid, this->trdid,
	1487	old_root_name, old_path, new_root_name, new_path, cycle );
	1488	#endif
	1489
	1490	// build extended pointer on lock protecting Inode Tree (in VFS root inode)
	1491	vfs_root_xp = process->vfs_root_xp;
	1492	vfs_root_ptr = GET_PTR( vfs_root_xp );
	1493	vfs_root_cxy = GET_CXY( vfs_root_xp );
	1494	lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock );
	1495
	1496	// take the lock protecting Inode Tree in write mode
	1497	remote_rwlock_wr_acquire( lock_xp );
	1498
	1499	// get extended pointer on target inode
	1500	error = vfs_lookup( old_root_xp,
	1501	old_path,
	1502	0,
	1503	&inode_xp,
	1504	NULL );
	1505	if( error )
	1506	{
	1507	remote_rwlock_wr_release( lock_xp );
	1508	printk("\n[ERROR] in %s : cannot get target inode for <%s>\n",
	1509	__FUNCTION__, old_path );
	1510	return -1;
	1511	}
	1512
	1513	#if( DEBUG_VFS_LINK & 1 )
	1514	if( DEBUG_VFS_LINK < cycle )
	1515	printk("\n[%s] thread[%x,%x] get child inode (%x,%x) for <%s>\n",
	1516	__FUNCTION__, process->pid, this->trdid,
	1517	GET_CXY(inode_xp), GET_PTR(inode_xp), old_path, cycle );
	1518	#endif
	1519
	1520	// get extended pointer on parent inode in new path
	1521	error = vfs_lookup( new_root_xp,
	1522	new_path,
	1523	VFS_LOOKUP_PARENT,
	1524	&new_parent_xp,
	1525	new_name );
	1526	if( error )
	1527	{
	1528	remote_rwlock_wr_release( lock_xp );
	1529	printk("\n[ERROR] in %s : cannot get parent inode for <%s>\n",
	1530	__FUNCTION__, new_path );
	1531	return -1;
	1532	}
	1533
	1534	#if( DEBUG_VFS_LINK & 1 )
	1535	if( DEBUG_VFS_LINK < cycle )
	1536	printk("\n[%s] thread[%x,%x] get parent inode (%x,%x) for <%s>\n",
	1537	__FUNCTION__, process->pid, this->trdid,
	1538	GET_CXY(new_parent_xp), GET_PTR(new_parent_xp), new_path );
	1539	#endif
	1540
	1541	// get target inode cluster and local pointer
	1542	inode_cxy = GET_CXY( inode_xp );
	1543	inode_ptr = GET_PTR( inode_xp );
	1544
	1545	// get target inode type, context, and FS type
	1546	inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) );
	1547	inode_ctx_ptr = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->ctx ) );
	1548	inode_fs_type = hal_remote_l32( XPTR( inode_cxy , &inode_ctx_ptr->type ) );
	1549
	1550	// get new parent inode cluster an local pointer
	1551	new_parent_ptr = GET_PTR( new_parent_xp );
	1552	new_parent_cxy = GET_CXY( new_parent_xp );
	1553
	1554	///////////////////////////////////////////////////////////////////////
	1555	if( (inode_type == INODE_TYPE_FILE) \|\| (inode_type == INODE_TYPE_DIR) )
	1556	{
	1557	// 1. create one new dentry
	1558	if( new_parent_cxy == local_cxy )
	1559	{
	1560	error = vfs_dentry_create( inode_fs_type,
	1561	new_name,
	1562	&dentry_xp );
	1563	}
	1564	else
	1565	{
	1566	rpc_vfs_dentry_create_client( new_parent_cxy,
	1567	inode_fs_type,
	1568	new_name,
	1569	&dentry_xp,
	1570	&error );
	1571	}
	1572
	1573	if( error )
	1574	{
	1575	remote_rwlock_wr_release( lock_xp );
	1576	printk("\n[ERROR] in %s : cannot create new dentry for <%s>\n",
	1577	__FUNCTION__, new_path );
	1578	return -1;
	1579	}
	1580
	1581	// get local pointer on dentry
	1582	dentry_ptr = GET_PTR( dentry_xp );
	1583
	1584	// 2. register dentry in target inode
	1585	parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents );
	1586	parents_entry_xp = XPTR( new_parent_cxy , &dentry_ptr->parents );
	1587	xlist_add_first( parents_root_xp , parents_entry_xp );
	1588	hal_remote_atomic_add( XPTR( inode_cxy , &inode_ptr->links ) , 1 );
	1589
	1590	// 3. register dentry in parent inode
	1591	children_xhtab_xp = XPTR( new_parent_cxy , &new_parent_ptr->children );
	1592	children_entry_xp = XPTR( new_parent_cxy , &dentry_ptr->children );
	1593	xhtab_insert( children_xhtab_xp , new_name , children_entry_xp );
	1594
	1595	// 4. update "parent" and "child_xp" fields in dentry
	1596	hal_remote_s64( XPTR( new_parent_cxy , &dentry_ptr->child_xp ) , inode_xp );
	1597	hal_remote_spt( XPTR( new_parent_cxy , &dentry_ptr->parent ) , new_parent_ptr );
	1598
	1599	#if(DEBUG_VFS_LINK & 1)
	1600	if( DEBUG_VFS_LINK < cycle )
	1601	printk("\n[%s] thread[%x,%x] updated Inode Tree / old <%s> / new <%s>\n",
	1602	__FUNCTION__, process->pid, this->trdid, old_path, new_path );
	1603	vfs_display( new_parent_xp );
	1604	#endif
	1605
	1606	// release the lock protecting Inode Tree
	1607	remote_rwlock_wr_release( lock_xp );
	1608
	1609	// 5. update new parent directory mapper in Inode Tree
	1610	// and synchronize the parent directory on IOC device
	1611	if (new_parent_cxy == local_cxy)
	1612	{
	1613	error = vfs_fs_add_dentry( new_parent_ptr,
	1614	dentry_ptr );
	1615	}
	1616	else
	1617	{
	1618	rpc_vfs_fs_add_dentry_client( new_parent_cxy,
	1619	new_parent_ptr,
	1620	dentry_ptr,
	1621	&error );
	1622	}
	1623	if( error )
	1624	{
	1625	printk("\n[ERROR] in %s : cannot update new parent directory for <%s>\n",
	1626	__FUNCTION__, new_path );
	1627	return -1;
	1628	}
	1629
	1630	#if(DEBUG_VFS_LINK & 1)
	1631	if( DEBUG_VFS_LINK < cycle )
	1632	printk("\n[%s] thread[%x,%x] updated new parent dir (mapper and IOC) / old <%s> / new <%s>\n",
	1633	__FUNCTION__, process->pid, this->trdid, old_path, new_path );
	1634	#endif
	1635	return 0;
	1636	}
	1637	else
	1638	{
	1639	// release the lock protecting Inode Tree
	1640	remote_rwlock_wr_release( lock_xp );
	1641
	1642	printk("\n[ERROR] in %s : unsupported inode type %s\n",
	1643	__FUNCTION__ , vfs_inode_type_str( inode_type ) );
	1644	return -1;
	1645	}
	1646
	1647	} // end vfs_link()
	1648
	1649	/////////////////////////////////////
	1650	error_t vfs_unlink( xptr_t root_xp,
[23]	1651	char * path )
[1]	1652	{
[602]	1653	error_t error;
[610]	1654	xptr_t vfs_root_xp; // extended pointer on VFS root inode
	1655	vfs_inode_t * vfs_root_ptr; // local_pointer on VFS root inode
	1656	cxy_t vfs_root_cxy; // VFS root inode cluster identifier
	1657	xptr_t lock_xp; // extended pointer on lock protecting Inode Tree
	1658	xptr_t parent_xp; // extended pointer on target inode
	1659	cxy_t parent_cxy; // target inode cluster identifier
	1660	vfs_inode_t * parent_ptr; // target inode local pointer
[602]	1661	xptr_t inode_xp; // extended pointer on target inode
	1662	cxy_t inode_cxy; // target inode cluster identifier
	1663	vfs_inode_t * inode_ptr; // target inode local pointer
[610]	1664	uint32_t inode_links; // target inode links count
	1665	vfs_inode_type_t inode_type; // target inode type
	1666	uint32_t inode_children; // target inode number of children
	1667	xptr_t dentry_xp; // extended pointer on dentry to unlink
	1668	vfs_dentry_t * dentry_ptr; // local pointer on dentry to unlink
[623]	1669	vfs_ctx_t * ctx_ptr; // local pointer on FS context
	1670	vfs_fs_type_t fs_type; // File system type
[1]	1671
[610]	1672	char name[CONFIG_VFS_MAX_NAME_LENGTH]; // name of link to remove
	1673
	1674	thread_t * this = CURRENT_THREAD;
	1675	process_t * process = this->process;
	1676
[602]	1677	#if DEBUG_VFS_UNLINK
	1678	uint32_t cycle = (uint32_t)hal_get_cycles();
[610]	1679	char root_name[CONFIG_VFS_MAX_NAME_LENGTH];
	1680	vfs_inode_get_name( root_xp , root_name );
[602]	1681	if( DEBUG_VFS_UNLINK < cycle )
[623]	1682	printk("\n[%s] thread[%x,%x] : enter for root <%s> / path <%s> / cycle %d\n",
[610]	1683	__FUNCTION__, process->pid, this->trdid, root_name, path, cycle );
[602]	1684	#endif
	1685
[610]	1686	// build extended pointer on lock protecting Inode Tree (in VFS root inode)
	1687	vfs_root_xp = process->vfs_root_xp;
[633]	1688	vfs_root_ptr = GET_PTR( vfs_root_xp );
	1689	vfs_root_cxy = GET_CXY( vfs_root_xp );
[610]	1690	lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock );
[602]	1691
[610]	1692	// take the lock protecting Inode Tree
	1693	remote_rwlock_wr_acquire( lock_xp );
[602]	1694
[610]	1695	// get extended pointer on parent inode
	1696	error = vfs_lookup( root_xp,
	1697	path,
	1698	VFS_LOOKUP_PARENT,
	1699	&parent_xp,
	1700	name );
	1701	if( error )
	1702	{
	1703	remote_rwlock_wr_release( lock_xp );
	1704	printk("\n[ERROR] in %s : cannot get parent inode for <%s> in <%s>\n",
	1705	__FUNCTION__, name, path );
	1706	return -1;
	1707	}
	1708
	1709	// get parent inode cluster and local pointer
	1710	parent_cxy = GET_CXY( parent_xp );
	1711	parent_ptr = GET_PTR( parent_xp );
	1712
	1713	#if( DEBUG_VFS_UNLINK & 1 )
	1714	char parent_name[CONFIG_VFS_MAX_NAME_LENGTH];
	1715	vfs_inode_get_name( parent_xp , parent_name );
	1716	if( DEBUG_VFS_UNLINK < cycle )
[623]	1717	printk("\n[%s] thread[%x,%x] : parent inode <%s> is (%x,%x)\n",
[610]	1718	__FUNCTION__, process->pid, this->trdid, parent_name, parent_cxy, parent_ptr );
	1719	#endif
	1720
	1721	// build extended pointer on parent inode "children" xhtab
	1722	xptr_t children_xp = XPTR( parent_cxy , &parent_ptr->children );
	1723
[623]	1724	// try to get extended pointer on dentry from Inode Tree
[610]	1725	dentry_xp = xhtab_lookup( children_xp , name );
	1726
[623]	1727	// when dentry not found in Inode Tree, try to get it from inode tree
	1728
	1729	if( dentry_xp == XPTR_NULL ) // miss target dentry in Inode Tree
[610]	1730	{
	1731
	1732	#if( DEBUG_VFS_UNLINK & 1 )
	1733	if( DEBUG_VFS_UNLINK < cycle )
[623]	1734	printk("\n[%s] thread[%x,%x] : inode <%s> not found => scan parent mapper\n",
	1735	__FUNCTION__, process->pid, this->trdid, name );
[610]	1736	#endif
[623]	1737	// get parent inode FS type
	1738	ctx_ptr = hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->ctx ) );
	1739	fs_type = hal_remote_l32( XPTR( parent_cxy , &ctx_ptr->type ) );
[610]	1740
[623]	1741	// select a cluster for new inode
	1742	inode_cxy = cluster_random_select();
	1743
	1744	// speculatively insert a new child dentry/inode couple in inode tree
	1745	error = vfs_add_child_in_parent( inode_cxy,
	1746	fs_type,
	1747	parent_xp,
	1748	name,
	1749	&dentry_xp,
	1750	&inode_xp );
	1751	if( error )
	1752	{
	1753	printk("\n[ERROR] in %s : cannot create inode <%s> in path <%s>\n",
	1754	__FUNCTION__ , name, path );
	1755
	1756	vfs_remove_child_from_parent( dentry_xp );
	1757	return -1;
	1758	}
	1759
	1760	// get local pointers on new dentry and new inode descriptors
	1761	inode_ptr = GET_PTR( inode_xp );
	1762	dentry_ptr = GET_PTR( dentry_xp );
	1763
	1764	// scan parent mapper to find the missing dentry, and complete
	1765	// initialisation of new dentry and new inode descriptors In Inode Tree
	1766	if( parent_cxy == local_cxy )
	1767	{
	1768	error = vfs_fs_new_dentry( parent_ptr,
	1769	name,
	1770	inode_xp );
	1771	}
	1772	else
	1773	{
	1774	rpc_vfs_fs_new_dentry_client( parent_cxy,
	1775	parent_ptr,
	1776	name,
	1777	inode_xp,
	1778	&error );
	1779	}
	1780
	1781	if ( error ) // dentry not found in parent mapper
	1782	{
	1783	printk("\n[ERROR] in %s : cannot get dentry <%s> in path <%s>\n",
	1784	__FUNCTION__ , name, path );
	1785	return -1;
	1786	}
	1787
	1788	#if (DEBUG_VFS_UNLINK & 1)
	1789	if( DEBUG_VFS_UNLINK < cycle )
	1790	printk("\n[%s] thread[%x,%x] : created missing inode & dentry <%s> in cluster %x\n",
	1791	__FUNCTION__, process->pid, this->trdid, name, inode_cxy );
	1792	#endif
	1793
	1794	}
	1795	else // found target dentry in Inode Tree
	1796	{
	1797	dentry_ptr = GET_PTR( dentry_xp );
	1798
	1799	// get pointer on target inode from dentry
	1800	inode_xp = hal_remote_l64( XPTR( parent_cxy , &dentry_ptr->child_xp ) );
	1801	inode_cxy = GET_CXY( inode_xp );
	1802	inode_ptr = GET_PTR( inode_xp );
	1803	}
	1804
	1805	// At this point the Inode Tree contains the target dentry and child inode
	1806	// we can safely remove this dentry from both the parent mapper, and the Inode Tree.
	1807
[610]	1808	#if( DEBUG_VFS_UNLINK & 1 )
	1809	if( DEBUG_VFS_UNLINK < cycle )
[623]	1810	printk("\n[%s] thread[%x,%x] : dentry (%x,%x) / inode (%x,%x)\n",
	1811	__FUNCTION__, process->pid, this->trdid, parent_cxy, dentry_ptr, inode_cxy, inode_ptr );
[610]	1812	#endif
[602]	1813
[610]	1814	// get target inode "type" and "links"
	1815	inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) );
	1816	inode_links = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->links ) );
[602]	1817
[610]	1818	///////////////////////////////////////////////////////////////////////
	1819	if( (inode_type == INODE_TYPE_FILE) \|\| (inode_type == INODE_TYPE_DIR) )
[602]	1820	{
[623]	1821
	1822	#if( DEBUG_VFS_UNLINK & 1 )
	1823	if( DEBUG_VFS_UNLINK < cycle )
	1824	printk("\n[%s] thread[%x,%x] : unlink inode <%s> / type %s / %d links\n",
	1825	__FUNCTION__, process->pid, this->trdid, name, vfs_inode_type_str(inode_type), inode_links );
	1826	#endif
	1827
[610]	1828	// 1. Release clusters allocated to target inode
	1829	// and synchronize the FAT on IOC device if last link.
	1830	if( inode_links == 1 )
[602]	1831	{
[610]	1832	// build extended pointer on target inode "children" number
	1833	xptr_t inode_children_xp = XPTR( inode_cxy , &inode_ptr->children.items );
[602]	1834
[610]	1835	// get target inode number of children
	1836	inode_children = hal_remote_l32( inode_children_xp );
	1837
	1838	// check no children
	1839	if( inode_children != 0 )
	1840	{
	1841	remote_rwlock_wr_release( lock_xp );
	1842	printk("\n[ERROR] in %s : cannot remove <%s> inode that has children\n",
	1843	__FUNCTION__, path );
	1844	return -1;
	1845	}
	1846
	1847	// release clusters on IOC device
	1848	error = vfs_fs_release_inode( inode_xp );
	1849
	1850	if( error )
	1851	{
	1852	remote_rwlock_wr_release( lock_xp );
	1853	printk("\n[ERROR] in %s : cannot update FAT mapper to remove <%s> inode\n",
	1854	__FUNCTION__ , path );
	1855	return -1;
	1856	}
	1857
[602]	1858	#if(DEBUG_VFS_UNLINK & 1)
	1859	if( DEBUG_VFS_UNLINK < cycle )
	1860	printk("\n[%s] thread[%x,%x] removed <%s> inode from FAT (mapper and IOC device)\n",
[610]	1861	__FUNCTION__, process->pid, this->trdid, path );
[602]	1862	#endif
[610]	1863	}
[602]	1864
[610]	1865	// 2. update parent directory mapper
	1866	// and synchronize the parent directory on IOC device
	1867	if (parent_cxy == local_cxy)
[602]	1868	{
[610]	1869	error = vfs_fs_remove_dentry( parent_ptr,
[602]	1870	dentry_ptr );
	1871	}
[610]	1872	else
[602]	1873	{
[610]	1874	rpc_vfs_fs_remove_dentry_client( parent_cxy,
	1875	parent_ptr,
[602]	1876	dentry_ptr,
	1877	&error );
	1878	}
[610]	1879
[602]	1880	if( error )
	1881	{
[610]	1882	remote_rwlock_wr_release( lock_xp );
	1883	printk("\n[ERROR] in %s : cannot update dentry on device for <%s>\n",
	1884	__FUNCTION__ , path );
[602]	1885	return -1;
	1886	}
	1887
	1888	#if(DEBUG_VFS_UNLINK & 1)
	1889	if( DEBUG_VFS_UNLINK < cycle )
	1890	printk("\n[%s] thread[%x,%x] removed <%s> inode from parent dir (mapper and IOC device)\n",
[610]	1891	__FUNCTION__, process->pid, this->trdid, path );
[602]	1892	#endif
[610]	1893	// 3. remove dentry from Inode Tree (and associated chils inode when last link)
	1894	vfs_remove_child_from_parent( dentry_xp );
[602]	1895
[610]	1896	// release the lock protecting Inode Tree
	1897	remote_rwlock_wr_release( lock_xp );
	1898
[602]	1899	#if DEBUG_VFS_UNLINK
	1900	if( DEBUG_VFS_UNLINK < cycle )
	1901	printk("\n[%s] thread[%x,%x] exit / removed <%s> inode from Inode Tree / cycle %d\n",
[610]	1902	__FUNCTION__, process->pid, this->trdid, path, cycle );
[602]	1903	#endif
	1904	return 0;
	1905	}
	1906	else
	1907	{
[610]	1908	remote_rwlock_wr_release( lock_xp );
	1909	printk("\n[ERROR] in %s : unsupported inode type %s\n",
	1910	__FUNCTION__ , vfs_inode_type_str( inode_type ) );
[602]	1911	return -1;
	1912	}
	1913
	1914	} // end vfs_unlink()
	1915
[611]	1916	////////////////////////////////////////////////
	1917	error_t vfs_stat( xptr_t root_inode_xp,
	1918	char * path,
	1919	struct stat * st )
[1]	1920	{
[610]	1921	error_t error;
	1922	xptr_t inode_xp; // extended pointer on target inode
	1923	vfs_inode_t * inode_ptr; // local pointer on target inode
	1924	cxy_t inode_cxy; // target inode cluster identifier
	1925	xptr_t vfs_root_xp; // extended pointer on VFS root inode
	1926	vfs_inode_t * vfs_root_ptr; // local_pointer on VFS root inode
	1927	cxy_t vfs_root_cxy; // VFS root inode cluster identifier
	1928	xptr_t lock_xp; // extended pointer on lock protecting Inode Tree
	1929
	1930	thread_t * this = CURRENT_THREAD;
	1931	process_t * process = this->process;
	1932
	1933	// build extended pointer on lock protecting Inode Tree (in VFS root inode)
	1934	vfs_root_xp = process->vfs_root_xp;
	1935	vfs_root_ptr = GET_PTR( vfs_root_xp );
	1936	vfs_root_cxy = GET_CXY( vfs_root_xp );
	1937	lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock );
	1938
	1939	// get the lock protecting Inode Tree in read mode
	1940	remote_rwlock_rd_acquire( lock_xp );
	1941
	1942	// get extended pointer on target inode
	1943	error = vfs_lookup( root_inode_xp,
	1944	path,
	1945	0,
	1946	&inode_xp,
	1947	NULL );
	1948
	1949	// release the lock protecting Inode Tree
	1950	remote_rwlock_rd_release( lock_xp );
	1951
	1952	if( error )
	1953	{
	1954	printk("\n[ERROR] in %s : cannot found inode <%s>\n",
	1955	__FUNCTION__ , path );
	1956	return -1;
	1957	}
	1958
[598]	1959	// get cluster and local pointer on inode descriptor
[610]	1960	inode_ptr = GET_PTR( inode_xp );
	1961	inode_cxy = GET_CXY( inode_xp );
[598]	1962
	1963	// get relevant infos from inode descriptor
	1964	uint32_t inum = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->inum ) );
	1965	uint32_t size = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->size ) );
	1966	uint32_t uid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->uid ) );
	1967	uint32_t gid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->gid ) );
	1968	uint32_t type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) );
	1969	uint32_t rights = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->rights ) );
	1970
	1971	// set stat structure fields
	1972	st->st_ino = inum;
	1973	st->st_gid = gid;
	1974	st->st_uid = uid;
	1975	st->st_size = size;
	1976	st->st_mode = (type << 16) \| rights;
	1977
	1978	#if DEBUG_VFS_STAT
	1979	uint32_t cycle = (uint32_t)hal_get_cycles();
	1980	if( DEBUG_VFS_STAT < cycle )
	1981	printk("\n[%s] thread[%x,%x] set stat %x for inode %x in cluster %x / cycle %d\n"
	1982	" %s / inum %d / size %d\n",
[610]	1983	__FUNCTION__, process->pid, this->trdid, st, inode_ptr, inode_cxy, cycle,
[598]	1984	vfs_inode_type_str( type ), inum, size );
	1985	#endif
	1986
[1]	1987	return 0;
	1988
[602]	1989	} // end vfs_stat()
	1990
[23]	1991	////////////////////////////////////
[610]	1992	error_t vfs_chdir( xptr_t root_xp,
[23]	1993	char * path )
[1]	1994	{
[23]	1995	error_t error;
[610]	1996	xptr_t inode_xp; // extended pointer on target inode
	1997	cxy_t inode_cxy; // target inode cluster identifier
	1998	vfs_inode_t * inode_ptr; // target inode local pointer
	1999	vfs_inode_type_t inode_type; // target inode type
	2000	xptr_t vfs_root_xp; // extended pointer on VFS root inode
	2001	vfs_inode_t * vfs_root_ptr; // local_pointer on VFS root inode
	2002	cxy_t vfs_root_cxy; // VFS root inode cluster identifier
	2003	xptr_t main_lock_xp; // extended pointer on lock protecting Inode Tree
	2004	xptr_t ref_xp; // extended pointer on reference process
	2005	process_t * ref_ptr; // local pointer on reference process
	2006	cxy_t ref_cxy; // reference process cluster
	2007	xptr_t cwd_lock_xp; // extended pointer on lock protecting CWD change
	2008	xptr_t cwd_xp_xp; // extended pointer on cwd_xp in reference process
[23]	2009
[610]	2010	thread_t * this = CURRENT_THREAD;
	2011	process_t * process = this->process;
[23]	2012
[610]	2013	#if DEBUG_VFS_CHDIR
	2014	uint32_t cycle = (uint32_t)hal_get_cycles();
	2015	if( DEBUG_VFS_CHDIR < cycle )
	2016	printk("\n[%s] thread[%x,%x] enter for path <%s> / cycle %d\n",
	2017	__FUNCTION__, process->pid, this->trdid, path, cycle );
	2018	#endif
	2019
	2020	// build extended pointer on lock protecting Inode Tree (in VFS root inode)
	2021	vfs_root_xp = process->vfs_root_xp;
	2022	vfs_root_ptr = GET_PTR( vfs_root_xp );
	2023	vfs_root_cxy = GET_CXY( vfs_root_xp );
	2024	main_lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock );
	2025
	2026	// take lock protecting Inode Tree in read mode
	2027	remote_rwlock_rd_acquire( main_lock_xp );
	2028
[23]	2029	// get extended pointer on target inode
[610]	2030	error = vfs_lookup( root_xp,
	2031	path,
	2032	VFS_LOOKUP_DIR,
	2033	&inode_xp,
	2034	NULL );
[23]	2035
[610]	2036	// release lock protecting Inode Tree in read mode
	2037	remote_rwlock_rd_release( main_lock_xp );
[23]	2038
[610]	2039	if( error )
	2040	{
	2041	printk("\n[ERROR] in %s : <%s> not found\n",
	2042	__FUNCTION__, path );
	2043	return -1;
	2044	}
	2045
	2046	// get inode type from remote file
[23]	2047	inode_cxy = GET_CXY( inode_xp );
[473]	2048	inode_ptr = GET_PTR( inode_xp );
[568]	2049	inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) );
[23]	2050
	2051	if( inode_type != INODE_TYPE_DIR )
	2052	{
[610]	2053	printk("\n[ERROR] in %s : <%s> is not a directory\n",
	2054	__FUNCTION__, path );
[23]	2055	return -1;
	2056	}
	2057
[610]	2058	// build extended pointer on cwd_lock and cwd_xp
	2059	ref_xp = process->ref_xp;
	2060	ref_ptr = GET_PTR( ref_xp );
	2061	ref_cxy = GET_CXY( ref_xp );
	2062	cwd_lock_xp = XPTR( ref_cxy , &ref_ptr->cwd_lock );
	2063	cwd_xp_xp = XPTR( ref_cxy , &ref_ptr->cwd_xp );
[568]	2064
[610]	2065	// take lock protecting CWD changes
	2066	remote_busylock_acquire( cwd_lock_xp );
[568]	2067
[610]	2068	// update cwd_xp field in reference process descriptor
	2069	hal_remote_s64( cwd_xp_xp , inode_xp );
	2070
	2071	// release lock protecting CWD changes
	2072	remote_busylock_release( cwd_lock_xp );
	2073
	2074	#if DEBUG_VFS_CHDIR
	2075	cycle = (uint32_t)hal_get_cycles();
	2076	if( DEBUG_VFS_CHDIR < cycle )
	2077	printk("\n[%s] thread[%x,%x] exit : inode (%x,%x) / &cwd_xp (%x,%x) / cycle %d\n",
	2078	__FUNCTION__, process->pid, this->trdid, inode_cxy, inode_ptr,
	2079	GET_CXY(cwd_xp_xp), GET_PTR(cwd_xp_xp), cycle );
	2080	#endif
	2081
[1]	2082	return 0;
	2083
[610]	2084	} // end vfs_chdir()
	2085
[23]	2086	///////////////////////////////////
	2087	error_t vfs_chmod( xptr_t cwd_xp,
	2088	char * path,
	2089	uint32_t rights )
[1]	2090	{
[23]	2091	error_t error;
	2092	xptr_t inode_xp; // extended pointer on target inode
	2093	cxy_t inode_cxy; // inode cluster identifier
	2094	vfs_inode_t * inode_ptr; // inode local pointer
	2095
[625]	2096	// check lookup working mode
	2097	assert( (rights == 0), "access rights non implemented yet" );
[23]	2098
	2099	// get extended pointer on target inode
[610]	2100	error = vfs_lookup( cwd_xp,
	2101	path,
	2102	0,
	2103	&inode_xp,
	2104	NULL );
[23]	2105
	2106	if( error ) return error;
	2107
	2108	// get inode cluster and local pointer
	2109	inode_cxy = GET_CXY( inode_xp );
[473]	2110	inode_ptr = GET_PTR( inode_xp );
[23]	2111
	2112	// get inode type from remote inode
[633]	2113	// inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) );
[23]	2114
[633]	2115	// TODO finalize implementation
[610]	2116
[625]	2117	assert( false , "not implemented" );
[610]	2118
[633]	2119	// set inode rights in remote inode
	2120	hal_remote_s32( XPTR( inode_cxy , &inode_ptr->rights ) , rights );
	2121
[1]	2122	return 0;
	2123	}
	2124
[23]	2125	///////////////////////////////////
	2126	error_t vfs_mkfifo( xptr_t cwd_xp,
	2127	char * path,
	2128	uint32_t rights )
	2129	{
[625]	2130	assert( false , "not implemented %l %x %x", cwd_xp, path, rights );
[23]	2131	return 0;
	2132	}
[1]	2133
	2134
	2135
[188]	2136	//////////////////////////////////////////////////////////////////////////////////////////
[602]	2137	// Distributed Inode Tree access related functions
[1]	2138	//////////////////////////////////////////////////////////////////////////////////////////
	2139
[188]	2140	//////////////////////////////////////////////////////////////////////////
	2141	// This static function is called by the vfs_display() function.
[337]	2142	// that is supposed to take the TXT0 lock.
[188]	2143	//////////////////////////////////////////////////////////////////////////
	2144	static void vfs_recursive_display( xptr_t inode_xp,
	2145	xptr_t name_xp,
	2146	uint32_t indent )
	2147	{
	2148	cxy_t inode_cxy;
	2149	vfs_inode_t * inode_ptr;
	2150	vfs_inode_type_t inode_type;
[598]	2151	uint32_t inode_size;
	2152	uint32_t inode_attr;
	2153	uint32_t inode_dirty;
[625]	2154	void * inode_extd;
	2155
[204]	2156	xptr_t children_xp; // extended pointer on children xhtab
[188]	2157
[204]	2158	xptr_t child_dentry_xp;
	2159	cxy_t child_dentry_cxy;
	2160	vfs_dentry_t * child_dentry_ptr;
	2161	xptr_t child_inode_xp;
	2162	xptr_t child_dentry_name_xp;
[598]	2163	mapper_t * mapper_ptr;
[188]	2164
	2165	char name[CONFIG_VFS_MAX_NAME_LENGTH];
	2166
	2167	char * indent_str[] = { "", // level 0
	2168	" ", // level 1
	2169	" ", // level 2
	2170	" ", // level 3
	2171	" ", // level 4
	2172	" ", // level 5
	2173	" ", // level 6
	2174	" ", // level 7
	2175	" ", // level 8
	2176	" ", // level 9
	2177	" ", // level 10
	2178	" ", // level 11
	2179	" ", // level 12
	2180	" ", // level 13
	2181	" ", // level 14
	2182	" " }; // level 15
	2183
[625]	2184	assert( (inode_xp != XPTR_NULL) , "inode_xp cannot be NULL" );
	2185	assert( (name_xp != XPTR_NULL) , "name_xp cannot be NULL" );
	2186	assert( (indent < 16) , "depth cannot be larger than 15" );
[188]	2187
[610]	2188	// get current inode cluster and local pointer
[188]	2189	inode_cxy = GET_CXY( inode_xp );
[473]	2190	inode_ptr = GET_PTR( inode_xp );
[188]	2191
[598]	2192	// get inode type, size, attr, mapper, and inum
	2193	inode_type = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->type ) );
	2194	inode_size = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->size ) );
	2195	inode_attr = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->attr ) );
[625]	2196	inode_extd = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->extend ) );
[598]	2197	mapper_ptr = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) );
[188]	2198
	2199	// make a local copy of node name
	2200	hal_remote_strcpy( XPTR( local_cxy , name ) , name_xp );
	2201
[598]	2202	// compute dirty
	2203	inode_dirty = ((inode_attr & INODE_ATTR_DIRTY) != 0);
	2204
[188]	2205	// display inode
[626]	2206	nolock_printk("%s<%s> : %s / extd %x / %d bytes / dirty %d / cxy %x / inode %x / mapper %x\n",
[625]	2207	indent_str[indent], name, vfs_inode_type_str( inode_type ), (uint32_t)inode_extd,
	2208	inode_size, inode_dirty, inode_cxy, inode_ptr, mapper_ptr );
[188]	2209
[611]	2210	// scan directory entries when current inode is a directory
	2211	// don't scan the the "." and ".." directories to break loops
	2212	if( (inode_type == INODE_TYPE_DIR) &&
	2213	(strcmp( name , "." ) != 0) &&
	2214	(strcmp( name , ".." ) != 0) )
[188]	2215	{
	2216	// get extended pointer on directory entries xhtab
[204]	2217	children_xp = XPTR( inode_cxy , &inode_ptr->children );
[188]	2218
	2219	// get xhtab lock
[568]	2220	xhtab_lock( children_xp );
[188]	2221
	2222	// get first dentry from xhtab
[204]	2223	child_dentry_xp = xhtab_get_first( children_xp );
[188]	2224
[204]	2225	while( child_dentry_xp != XPTR_NULL )
[188]	2226	{
	2227	// get dentry cluster and local pointer
[204]	2228	child_dentry_cxy = GET_CXY( child_dentry_xp );
[473]	2229	child_dentry_ptr = GET_PTR( child_dentry_xp );
[188]	2230
	2231	// get extended pointer on child inode
[568]	2232	child_inode_xp = hal_remote_l64( XPTR( child_dentry_cxy,
[204]	2233	&child_dentry_ptr->child_xp ) );
[188]	2234
	2235	// get extended pointer on dentry name
[204]	2236	child_dentry_name_xp = XPTR( child_dentry_cxy , &child_dentry_ptr->name );
[188]	2237
[568]	2238	// recursive call on inode display
[204]	2239	vfs_recursive_display( child_inode_xp,
	2240	child_dentry_name_xp,
	2241	indent+1 );
[188]	2242
	2243	// get next dentry
[204]	2244	child_dentry_xp = xhtab_get_next( children_xp );
[188]	2245	}
	2246
	2247	// release xhtab lock
[568]	2248	xhtab_unlock( children_xp );
[188]	2249	}
	2250	} // end vfs_recursive_display()
	2251
	2252	///////////////////////////////////
	2253	void vfs_display( xptr_t inode_xp )
	2254	{
[204]	2255	xptr_t name_xp;
[188]	2256	xptr_t dentry_xp;
	2257	cxy_t dentry_cxy;
	2258	vfs_dentry_t * dentry_ptr;
[610]	2259	xptr_t parents_root_xp; // root of parent dentries xlist
[188]	2260
	2261	// get target inode cluster and local pointer
	2262	cxy_t inode_cxy = GET_CXY( inode_xp );
[473]	2263	vfs_inode_t * inode_ptr = GET_PTR( inode_xp );
[188]	2264
[610]	2265	// build extended pointer on parents dentries root
	2266	parents_root_xp = XPTR( inode_cxy , &inode_ptr->parents );
[188]	2267
[610]	2268	// check VFS root
	2269	if( xlist_is_empty( parents_root_xp ) ) // inode is the VFS root
[188]	2270	{
	2271	// build extended pointer on root name
	2272	name_xp = XPTR( local_cxy , "/" );
	2273	}
	2274	else
	2275	{
[610]	2276	// get first parent dentry cluster and pointers
	2277	dentry_xp = XLIST_FIRST( parents_root_xp , vfs_dentry_t , parents );
[188]	2278	dentry_cxy = GET_CXY( dentry_xp );
[473]	2279	dentry_ptr = GET_PTR( dentry_xp );
[188]	2280
	2281	// get extended pointer on dentry name
	2282	name_xp = XPTR( dentry_cxy , &dentry_ptr->name );
	2283	}
	2284
[337]	2285	// get pointers on TXT0 chdev
[407]	2286	xptr_t txt0_xp = chdev_dir.txt_tx[0];
[337]	2287	cxy_t txt0_cxy = GET_CXY( txt0_xp );
	2288	chdev_t * txt0_ptr = GET_PTR( txt0_xp );
	2289
	2290	// get extended pointer on remote TXT0 chdev lock
	2291	xptr_t lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock );
	2292
	2293	// get TXT0 lock in busy waiting mode
[568]	2294	remote_busylock_acquire( lock_xp );
[337]	2295
[188]	2296	// print header
[401]	2297	nolock_printk("\n***** file system state\n\n");
[188]	2298
	2299	// call recursive function
[473]	2300	vfs_recursive_display( inode_xp , name_xp , 0 );
[188]	2301
[337]	2302	// release lock
[568]	2303	remote_busylock_release( lock_xp );
[337]	2304
[204]	2305	} // end vfs_display()
[188]	2306
[602]	2307	/*
[1]	2308	//////////////////////////////////////////////////////////////////////////////////////////
[602]	2309	// This static function is used by the vfs_lookup() function.
[1]	2310	// It takes an extended pointer on a remote inode (parent directory inode),
	2311	// and check access_rights violation for the calling thread.
	2312	// It can be used by any thread running in any cluster.
	2313	//////////////////////////////////////////////////////////////////////////////////////////
	2314	// @ inode_xp : extended pointer on inode.
	2315	// @ client_uid : client thread user ID
	2316	// @ client_gid : client thread group ID
	2317	// @ return true if access rights are violated.
	2318	//////////////////////////////////////////////////////////////////////////////////////////
[602]	2319	static bool_t vfs_access_denied( xptr_t inode_xp,
[1]	2320	uint32_t client_uid,
	2321	uint32_t client_gid )
	2322	{
	2323	// get found inode cluster and local pointer
	2324	cxy_t inode_cxy = GET_CXY( inode_xp );
[473]	2325	vfs_inode_t * inode_ptr = GET_PTR( inode_xp );
[1]	2326
	2327	// get inode access mode, UID, and GID
[568]	2328	// TODO uint32_t mode = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->mode ) );
	2329	uid_t uid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->uid ) );
	2330	gid_t gid = hal_remote_l32( XPTR( inode_cxy , &inode_ptr->gid ) );
[1]	2331
[634]	2332	// TODO : me must use mode
[1]	2333	if( (uid == client_uid) \|\| (gid == client_gid) ) return false;
	2334	else return true;
	2335	}
[602]	2336	*/
[1]	2337
	2338	//////////////////////////////////////////////////////////////////////////////////////////
	2339	// This static function is used by the vfs_lookup() function.
[204]	2340	// It takes an extended pointer on a remote parent directory inode, a directory
[626]	2341	// entry name, and and scan the XHTAB associated to the parent inode to find the
	2342	// searched dentry. It does NOT modify the inode tree in case of miss.
[1]	2343	// It can be used by any thread running in any cluster.
	2344	//////////////////////////////////////////////////////////////////////////////////////////
	2345	// @ parent_xp : extended pointer on parent inode in remote cluster.
	2346	// @ name : dentry name
	2347	// @ child_xp : [out] buffer for extended pointer on child inode.
	2348	// @ return true if success / return false if not found.
	2349	//////////////////////////////////////////////////////////////////////////////////////////
	2350	static bool_t vfs_get_child( xptr_t parent_xp,
	2351	char * name,
	2352	xptr_t * child_xp )
	2353	{
[610]	2354	xptr_t xhtab_xp; // extended pointer on hash table for children dentries
	2355	xptr_t dentry_xp; // extended pointer on children dentry
	2356	cxy_t dentry_cxy;
	2357	vfs_dentry_t * dentry_ptr;
[1]	2358
	2359	// get parent inode cluster and local pointer
	2360	cxy_t parent_cxy = GET_CXY( parent_xp );
[473]	2361	vfs_inode_t * parent_ptr = GET_PTR( parent_xp );
[1]	2362
	2363	// get extended pointer on hash table of children directory entries
	2364	xhtab_xp = XPTR( parent_cxy , &parent_ptr->children );
	2365
[610]	2366	// get pointers on matching dentry
	2367	dentry_xp = xhtab_lookup( xhtab_xp , name );
	2368	dentry_cxy = GET_CXY( dentry_xp );
	2369	dentry_ptr = GET_PTR( dentry_xp );
[1]	2370
[610]	2371	if( dentry_xp == XPTR_NULL )
	2372	{
	2373	return false;
	2374	}
	2375	else
	2376	{
	2377	*child_xp = (xptr_t)hal_remote_l64( XPTR( dentry_cxy , &dentry_ptr->child_xp ) );
	2378	return true;
	2379	}
[1]	2380
[204]	2381	} // end vfs_get_child()
	2382
[1]	2383	//////////////////////////////////////////////////////////////////////////////////////////
	2384	// This static function is used by the vfs_lookup() function.
	2385	// It takes the <current> pointer on a buffer containing a complete pathname, and return
	2386	// in the <name> buffer, allocated by the caller, a single name in the path.
	2387	// It return also in the <next> pointer the next character to analyse in the path.
	2388	// Finally it returns a <last> boolean, that is true when the returned <name> is the
	2389	// last name in the path. The names are supposed to be separated by one or several '/'
	2390	// characters, that are not written in the <name> buffer.
[610]	2391	//
	2392	// WARNING: the leading characters '/' in the path are skiped before analysis.
	2393	// The path "/" identifies the VFS root, and is therefore anaysed as an empty
	2394	// string. This empty string is dignaled by the (-1) return value.
[1]	2395	//////////////////////////////////////////////////////////////////////////////////////////
	2396	// @ current : pointer on first character to analyse in buffer containing the path.
	2397	// @ name : [out] pointer on buffer allocated by the caller for the returned name.
	2398	// @ next : [out] pointer on next character to analyse in buffer containing the path.
	2399	// @ last : [out] true if the returned name is the last (NUL character found).
[610]	2400	// @ return 0 if success / return -1 if string empty (first chracter is NUL).
[1]	2401	//////////////////////////////////////////////////////////////////////////////////////////
	2402	static error_t vfs_get_name_from_path( char * current,
	2403	char * name,
	2404	char ** next,
	2405	bool_t * last )
	2406	{
	2407	char * ptr = current;
	2408
	2409	// skip leading '/' characters
	2410	while( *ptr == '/' ) ptr++;
	2411
[610]	2412	// signal empty string
	2413	if( *ptr == 0 )
	2414	{
	2415	*last = true;
	2416	return -1;
	2417	}
[1]	2418
	2419	// copy all characters in name until NUL or '/'
	2420	while( (ptr != 0) && (ptr !='/') ) (name++) = (ptr++);
	2421
[204]	2422	// set NUL terminating character in name buffer
	2423	*(name++) = 0;
	2424
[1]	2425	// return last an next
	2426	if( *ptr == 0 ) // last found character is NUL => last name in path
	2427	{
	2428	*last = true;
	2429	}
	2430	else // last found character is '/' => skip it
	2431	{
	2432	*last = false;
	2433	*next = ptr + 1;
	2434	}
	2435
	2436	return 0;
[204]	2437
	2438	} // end vfs_get name_from_path()
[188]	2439
[610]	2440	///////////////////////////////////////////////
	2441	error_t vfs_lookup( xptr_t root_xp,
[23]	2442	char * pathname,
[610]	2443	uint32_t lookup_mode,
	2444	xptr_t * inode_xp,
	2445	char * last_name )
[1]	2446	{
[101]	2447	char name[CONFIG_VFS_MAX_NAME_LENGTH]; // one name in path
[1]	2448
[23]	2449	xptr_t parent_xp; // extended pointer on parent inode
	2450	cxy_t parent_cxy; // cluster for parent inode
	2451	vfs_inode_t * parent_ptr; // local pointer on parent inode
[602]	2452	xptr_t dentry_xp; // extended pointer on dentry
[23]	2453	xptr_t child_xp; // extended pointer on child inode
	2454	cxy_t child_cxy; // cluster for child inode
[602]	2455	vfs_inode_t * child_ptr; // local pointer on child inode
[23]	2456	vfs_fs_type_t fs_type; // File system type
	2457	vfs_ctx_t * ctx_ptr; // local pointer on FS context
	2458	char * current; // current pointer on path
	2459	char * next; // next value for current pointer
	2460	bool_t last; // true when the name is the last in path
	2461	bool_t found; // true when a child has been found
[459]	2462	bool_t create; // searched inode must be created if not found
	2463	bool_t excl; // searched inode must not exist
[626]	2464	bool_t parent; // searched inode is the parent
[23]	2465	thread_t * this; // pointer on calling thread descriptor
	2466	process_t * process; // pointer on calling process descriptor
	2467	error_t error;
[1]	2468
	2469	this = CURRENT_THREAD;
	2470	process = this->process;
	2471
[610]	2472	// check pathname / root_xp consistency
	2473	assert( ((pathname[0] != '/') \|\| (root_xp == process->vfs_root_xp)),
[625]	2474	"root inode must be VFS root for path <%s>", pathname );
[610]	2475
[438]	2476	#if DEBUG_VFS_LOOKUP
[433]	2477	uint32_t cycle = (uint32_t)hal_get_cycles();
[610]	2478	char root_name[CONFIG_VFS_MAX_NAME_LENGTH];
	2479	vfs_inode_get_name( root_xp , root_name );
[438]	2480	if( DEBUG_VFS_LOOKUP < cycle )
[610]	2481	printk("\n[%s] thread[%x,%x] enter / root <%s> / path <%s> / mode %x / cycle %d\n",
	2482	__FUNCTION__, process->pid, this->trdid, root_name, pathname, lookup_mode, cycle );
[433]	2483	#endif
[380]	2484
[459]	2485	// compute lookup flags
[610]	2486	create = (lookup_mode & VFS_LOOKUP_CREATE) == VFS_LOOKUP_CREATE;
	2487	excl = (lookup_mode & VFS_LOOKUP_EXCL) == VFS_LOOKUP_EXCL;
[626]	2488	parent = (lookup_mode & VFS_LOOKUP_PARENT) == VFS_LOOKUP_PARENT;
[1]	2489
[610]	2490	// initialise loop variables
	2491	parent_xp = root_xp;
	2492	current = pathname;
	2493	next = NULL;
	2494	last = false;
	2495	child_xp = XPTR_NULL;
[1]	2496
[610]	2497	// loop on nodes in pathname
	2498	// load from device if one node in path not found in Inode Tree
[401]	2499	// exit loop when last name found (i.e. last == true)
[610]	2500	while( 1 )
[1]	2501	{
[610]	2502	// get parent inode cluster and local pointer
	2503	parent_cxy = GET_CXY( parent_xp );
	2504	parent_ptr = GET_PTR( parent_xp );
[1]	2505
[610]	2506	// get one "name" from path, and "last" flag
	2507	error = vfs_get_name_from_path( current , name , &next , &last );
	2508
[611]	2509	// handle VFS root case
[610]	2510	if ( error )
	2511	{
	2512
	2513	#if DEBUG_VFS_LOOKUP
	2514	cycle = (uint32_t)hal_get_cycles();
	2515	if( DEBUG_VFS_LOOKUP < cycle )
	2516	printk("\n[%s] thread[%x,%x] exit / parent inode(%x,%x) / <%s> / cycle %d\n",
	2517	__FUNCTION__ , process->pid, this->trdid, parent_cxy, parent_ptr, pathname, cycle );
	2518	#endif
	2519	*inode_xp = process->vfs_root_xp;
	2520	break;
	2521	}
	2522
[438]	2523	#if (DEBUG_VFS_LOOKUP & 1)
	2524	if( DEBUG_VFS_LOOKUP < cycle )
[628]	2525	printk("\n[%s] thread[%x,%x] search <%s> in <%s> / last = %d\n",
[602]	2526	__FUNCTION__, process->pid, this->trdid, name, pathname, last );
[433]	2527	#endif
[101]	2528
[610]	2529	// search the child dentry matching name in parent inode
[1]	2530	found = vfs_get_child( parent_xp,
	2531	name,
	2532	&child_xp );
	2533
[611]	2534	// get child inode local pointer and cluster
	2535	child_ptr = GET_PTR( child_xp );
	2536	child_cxy = GET_CXY( child_xp );
	2537
[610]	2538	if( found == false ) // not found in Inode Tree
[1]	2539	{
[610]	2540	// when a inode is not found in the Inode Tree:
[626]	2541	// - if (last and parent) the Inode Tree is not modified
[610]	2542	// - else we speculatively introduce a new (dentry/inode) in inode tree,
	2543	// and scan the parent directory mapper to initialise it.
	2544	// . if it is not found in the parent mapper:
	2545	// - if(last and create), a brand new file or directory is created
	2546	// - else, an error is reported
	2547	// . if it is found in parent mapper:
	2548	// - if( last and excl ), an error is reported
	2549	// - else the new child (inode & dentry) is initialised in Inode Tree
	2550	// - if the child is a directory, the child mapper is loaded from device
[101]	2551
[626]	2552	if( last && parent ) // does nothing
[610]	2553	{
	2554
[438]	2555	#if (DEBUG_VFS_LOOKUP & 1)
	2556	if( DEBUG_VFS_LOOKUP < cycle )
[610]	2557	printk("\n[%s] thread[%x,%x] child not found but only parent requested in <%s>\n",
	2558	__FUNCTION__, process->pid, this->trdid, pathname );
	2559	#endif
	2560	}
	2561	else // try to get it from parent mapper
	2562	{
	2563
	2564	#if (DEBUG_VFS_LOOKUP & 1)
	2565	if( DEBUG_VFS_LOOKUP < cycle )
	2566	printk("\n[%s] thread[%x,%x] miss <%s> inode in Inode Tree => build from parent mapper\n",
[602]	2567	__FUNCTION__, process->pid, this->trdid, name );
[433]	2568	#endif
[610]	2569	// get parent inode FS type
	2570	ctx_ptr = hal_remote_lpt( XPTR( parent_cxy,&parent_ptr->ctx ) );
	2571	fs_type = hal_remote_l32( XPTR( parent_cxy , &ctx_ptr->type ) );
[407]	2572
[610]	2573	// select a cluster for new inode
	2574	child_cxy = cluster_random_select();
[602]	2575
[611]	2576	// insert a new child dentry/inode couple in inode tree
[610]	2577	error = vfs_add_child_in_parent( child_cxy,
	2578	fs_type,
	2579	parent_xp,
	2580	name,
	2581	&dentry_xp,
	2582	&child_xp );
	2583	if( error )
	2584	{
	2585	printk("\n[ERROR] in %s : cannot create inode <%s> in path <%s>\n",
	2586	__FUNCTION__ , name, pathname );
	2587	return -1;
	2588	}
[238]	2589
[610]	2590	// get child inode local pointer
	2591	child_ptr = GET_PTR( child_xp );
[459]	2592
	2593	#if (DEBUG_VFS_LOOKUP & 1)
	2594	if( DEBUG_VFS_LOOKUP < cycle )
[629]	2595	printk("\n[%s] thread[%x,%x] created missing inode for <%s> in cluster %x\n",
[602]	2596	__FUNCTION__, process->pid, this->trdid, name, child_cxy );
[459]	2597	#endif
[610]	2598	// scan parent mapper to find the missing dentry, and complete
[611]	2599	// the initialisation of dentry and child inode descriptors
[610]	2600	if( parent_cxy == local_cxy )
	2601	{
[623]	2602	error = vfs_fs_new_dentry( parent_ptr,
[610]	2603	name,
	2604	child_xp );
	2605	}
	2606	else
	2607	{
[623]	2608	rpc_vfs_fs_new_dentry_client( parent_cxy,
[610]	2609	parent_ptr,
	2610	name,
	2611	child_xp,
	2612	&error );
	2613	}
[238]	2614
[626]	2615	// when the missing dentry is not in the parent mapper,
[629]	2616	// a new dentry must be registered in parent directory mapper
[626]	2617	if ( error )
[459]	2618	{
[625]	2619	if ( last && create ) // add a brand new dentry in parent directory
[602]	2620	{
[612]	2621	error = vfs_new_dentry_init( parent_xp,
	2622	dentry_xp,
	2623	child_xp );
[610]	2624	if ( error )
	2625	{
	2626	printk("\n[ERROR] in %s : cannot init inode <%s> in path <%s>\n",
	2627	__FUNCTION__, name, pathname );
	2628	vfs_remove_child_from_parent( dentry_xp );
	2629	return -1;
	2630	}
[1]	2631
[459]	2632	#if (DEBUG_VFS_LOOKUP & 1)
	2633	if( DEBUG_VFS_LOOKUP < cycle )
[626]	2634	printk("\n[%s] thread[%x,%x] child <%s> not found in parent mapper => created it\n",
[602]	2635	__FUNCTION__, process->pid, this->trdid, name );
[626]	2636	vfs_inode_display( child_xp );
[459]	2637	#endif
[626]	2638
	2639
[610]	2640	}
	2641	else // not last or not create => error
	2642	{
	2643	printk("\n[ERROR] in %s : <%s> node not found in parent for <%s>\n",
	2644	__FUNCTION__ , name , pathname );
	2645	vfs_remove_child_from_parent( dentry_xp );
	2646	return -1;
	2647	}
[238]	2648	}
[610]	2649	else // child has been found in parent mapper
[459]	2650	{
[610]	2651	// check the excl
	2652	if( last && create && excl )
[459]	2653	{
[610]	2654	printk("\n[ERROR] in %s : node already exist <%s>\n",
	2655	__FUNCTION__, name );
	2656	return -1;
[459]	2657	}
[610]	2658
	2659	#if (DEBUG_VFS_LOOKUP & 1)
	2660	if( DEBUG_VFS_LOOKUP < cycle )
	2661	printk("\n[%s] thread[%x,%x] initialised inode <%s> from parent mapper\n",
	2662	__FUNCTION__, process->pid, this->trdid, name );
	2663	#endif
	2664	// load child mapper from device if child is a directory (prefetch)
	2665	uint32_t type = hal_remote_l32( XPTR( child_cxy , &child_ptr->type ) );
	2666	if( type == INODE_TYPE_DIR )
[459]	2667	{
[610]	2668	if( child_cxy == local_cxy )
	2669	{
	2670	error = vfs_inode_load_all_pages( child_ptr );
	2671	}
	2672	else
	2673	{
	2674	rpc_vfs_inode_load_all_pages_client( child_cxy,
	2675	child_ptr,
	2676	&error );
	2677	}
	2678	if ( error )
	2679	{
	2680	printk("\n[ERROR] in %s : cannot load <%s> from device\n",
	2681	__FUNCTION__ , name );
	2682	vfs_remove_child_from_parent( dentry_xp );
	2683	return -1;
	2684	}
[238]	2685
[438]	2686	#if (DEBUG_VFS_LOOKUP & 1)
	2687	if( DEBUG_VFS_LOOKUP < cycle )
[610]	2688	printk("\n[%s] thread[%x,%x] loaded directory mapper for <%s> from IOC\n",
	2689	__FUNCTION__ , process->pid, this->trdid, name );
[433]	2690	#endif
[610]	2691	}
[459]	2692	}
	2693	}
[1]	2694	}
[610]	2695	else // child directly found in inode tree
[459]	2696	{
	2697
[438]	2698	#if (DEBUG_VFS_LOOKUP & 1)
	2699	if( DEBUG_VFS_LOOKUP < cycle )
[610]	2700	printk("\n[%s] thread[%x,%x] found <%s> in Inode Tree / inode (%x,%x)\n",
[611]	2701	__FUNCTION__, process->pid, this->trdid, name, child_cxy, child_ptr );
[433]	2702	#endif
[610]	2703	// check the excl flag
	2704	if( last && create && excl )
[459]	2705	{
[610]	2706	printk("\n[ERROR] in %s : node <%s> already exist\n",
	2707	__FUNCTION__, name );
	2708	return -1;
[459]	2709	}
	2710	}
	2711
[380]	2712	// TODO check access rights here [AG]
[23]	2713	// error = vfs_access_denied( child_xp,
	2714	// client_uid,
	2715	// client_gid );
	2716	// if( error )
	2717	// {
[441]	2718	// printk("\n[ERROR] in %s : thread %x / permission denied for %s\n",
	2719	// __FUNCTION__ , this , name );
[23]	2720	// return EACCES;
	2721	// }
[1]	2722
[238]	2723	// take lock on child inode and release lock on parent
[610]	2724	// vfs_inode_lock( child_xp );
	2725	// vfs_inode_unlock( parent_xp );
[1]	2726
[610]	2727	// exit when last
	2728	if ( last ) // last inode in path => return relevant info
	2729	{
[626]	2730	if ( parent ) // return parent inode and child name
[610]	2731	{
[1]	2732
[610]	2733	#if DEBUG_VFS_LOOKUP
	2734	cycle = (uint32_t)hal_get_cycles();
	2735	if( DEBUG_VFS_LOOKUP < cycle )
	2736	printk("\n[%s] thread[%x,%x] exit / parent inode(%x,%x) / <%s> / cycle %d\n",
	2737	__FUNCTION__ , process->pid, this->trdid, parent_cxy, parent_ptr, pathname, cycle );
	2738	#endif
	2739	*inode_xp = parent_xp;
	2740	strcpy( last_name , name );
	2741	break;
	2742	}
	2743	else // return child inode name
	2744	{
[1]	2745
[438]	2746	#if DEBUG_VFS_LOOKUP
[433]	2747	cycle = (uint32_t)hal_get_cycles();
[438]	2748	if( DEBUG_VFS_LOOKUP < cycle )
[610]	2749	printk("\n[%s] thread[%x,%x] exit / child inode (%x,%x) / <%s> / cycle %d\n",
	2750	__FUNCTION__ , process->pid, this->trdid, child_cxy, child_ptr, pathname, cycle );
[433]	2751	#endif
[610]	2752	*inode_xp = child_xp;
	2753	break;
	2754	}
	2755	}
	2756	else // not the last inode in path => update loop variables
	2757	{
	2758	parent_xp = child_xp;
	2759	current = next;
	2760	}
	2761	}
[1]	2762
	2763	return 0;
	2764
	2765	} // end vfs_lookup()
	2766
[612]	2767	////////////////////////////////////////////////
	2768	error_t vfs_new_dentry_init( xptr_t parent_xp,
	2769	xptr_t dentry_xp,
	2770	xptr_t child_xp )
[602]	2771	{
	2772	error_t error;
	2773	uint32_t cluster;
	2774	uint32_t child_type;
	2775	uint32_t child_size;
	2776
[625]	2777	#if DEBUG_VFS_NEW_DENTRY_INIT
[602]	2778	char parent_name[CONFIG_VFS_MAX_NAME_LENGTH];
	2779	char child_name[CONFIG_VFS_MAX_NAME_LENGTH];
	2780	vfs_inode_get_name( parent_xp , parent_name );
	2781	vfs_inode_get_name( child_xp , child_name );
	2782	uint32_t cycle = (uint32_t)hal_get_cycles();
	2783	thread_t * this = CURRENT_THREAD;
[625]	2784	if( DEBUG_VFS_NEW_DENTRY_INIT < cycle )
[602]	2785	printk("\n[%s] thread[%x,%x] enter / parent <%s> / child <%s> / cycle %d\n",
	2786	__FUNCTION__ , this->process->pid, this->trdid, parent_name, child_name, cycle );
	2787	#endif
	2788
	2789	// get parent inode cluster and local pointer
	2790	cxy_t parent_cxy = GET_CXY( parent_xp );
	2791	vfs_inode_t * parent_ptr = GET_PTR( parent_xp );
	2792
	2793	// get dentry local pointer
	2794	vfs_dentry_t * dentry_ptr = GET_PTR( dentry_xp );
	2795
	2796	// get child inode cluster and local pointer
	2797	cxy_t child_cxy = GET_CXY( child_xp );
	2798	vfs_inode_t * child_ptr = GET_PTR( child_xp );
	2799
[626]	2800	// 1. allocate one free cluster in file system to child inode,
[629]	2801	// and update the File Allocation Table in both the FAT mapper and IOC device.
[626]	2802	// It depends on the child inode FS type.
[602]	2803	vfs_ctx_t * ctx = hal_remote_lpt( XPTR( child_cxy , &child_ptr->ctx ) );
	2804
	2805	error = vfs_fs_cluster_alloc( ctx->type,
	2806	&cluster );
	2807	if ( error )
	2808	{
	2809	printk("\n[ERROR] in %s : cannot find a free VFS cluster\n",
	2810	__FUNCTION__ );
	2811	return -1;
	2812	}
	2813
[625]	2814	#if( DEBUG_VFS_NEW_DENTRY_INIT & 1)
	2815	if( DEBUG_VFS_NEW_DENTRY_INIT < cycle )
[626]	2816	printk("\n[%s] thread[%x,%x] allocated FS cluster %x to <%s>\n",
[625]	2817	__FUNCTION__ , this->process->pid, this->trdid, cluster, child_name );
[602]	2818	#endif
	2819
[626]	2820	// 2. update the child inode descriptor size and extend
[602]	2821	child_type = hal_remote_l32( XPTR( child_cxy , &child_ptr->type ) );
	2822	child_size = (child_type == INODE_TYPE_DIR) ? 4096 : 0;
	2823
	2824	hal_remote_s32( XPTR( child_cxy , &child_ptr->size ) , child_size );
	2825	hal_remote_spt( XPTR( child_cxy , &child_ptr->extend ) , (void*)(intptr_t)cluster );
	2826
	2827	// 3. update the parent inode mapper, and
	2828	// update the dentry extension if required
	2829	if( local_cxy == parent_cxy )
	2830	{
	2831	error = vfs_fs_add_dentry( parent_ptr,
	2832	dentry_ptr );
	2833	}
	2834	else
	2835	{
	2836	rpc_vfs_fs_add_dentry_client( parent_cxy,
	2837	parent_ptr,
	2838	dentry_ptr,
	2839	&error );
	2840	}
	2841	if ( error )
	2842	{
	2843	printk("\n[ERROR] in %s : cannot register child in parent directory\n",
	2844	__FUNCTION__ );
	2845	return -1;
	2846	}
	2847
[625]	2848	#if DEBUG_VFS_NEW_DENTRY_INIT
[602]	2849	cycle = (uint32_t)hal_get_cycles();
[625]	2850	if( DEBUG_VFS_NEW_DENTRY_INIT < cycle )
[610]	2851	printk("\n[%s] thread[%x,%x] exit / parent <%s> / child <%s> / cycle %d\n",
[602]	2852	__FUNCTION__ , this->process->pid, this->trdid, parent_name, child_name, cycle );
	2853	#endif
	2854
	2855	return 0;
	2856
[612]	2857	} // end vfs_new_dentry_init()
[602]	2858
[611]	2859	///////////////////////////////////////////////////
	2860	error_t vfs_add_special_dentries( xptr_t child_xp,
	2861	xptr_t parent_xp )
	2862	{
	2863	error_t error;
	2864	vfs_inode_t * child_ptr; // local pointer on child inode directory
	2865	cxy_t child_cxy; // child inode directory cluster identifier
	2866	vfs_ctx_t * ctx_ptr; // local pointer on child inode FS context
	2867	vfs_fs_type_t fs_type; // FS type of child inode
	2868	xptr_t dentry_xp; // extended pointer on dentry (used for . and ..)
	2869	vfs_dentry_t * dentry_ptr; // local pointer on dentry (used for . and ..)
	2870
[612]	2871	// xptr_t parents_root_xp; // extended pointer on inode "parents" field
	2872	// xptr_t parents_entry_xp; // extended pointer on dentry "parents" field
[611]	2873	xptr_t children_xhtab_xp; // extended pointer on inode "children" field
	2874	xptr_t children_entry_xp; // extended pointer on dentry "children" field
	2875
	2876	#if DEBUG_VFS_ADD_SPECIAL
	2877	uint32_t cycle = (uint32_t)hal_get_cycles();
	2878	thread_t * this = CURRENT_THREAD;
	2879	char child_name[CONFIG_VFS_MAX_NAME_LENGTH];
	2880	char parent_name[CONFIG_VFS_MAX_NAME_LENGTH];
	2881	vfs_inode_get_name( child_xp , child_name );
	2882	vfs_inode_get_name( parent_xp , parent_name );
	2883	if( DEBUG_VFS_ADD_SPECIAL < cycle )
[612]	2884	printk("\n[%s] thread[%x,%x] enter for child <%s> in parent <%s> / cycle %d\n",
[611]	2885	__FUNCTION__, this->process->pid, this->trdid, child_name, parent_name, cycle );
	2886	#endif
	2887
	2888	// get new directory cluster and local pointer
	2889	child_cxy = GET_CXY( child_xp );
	2890	child_ptr = GET_PTR( child_xp );
	2891
	2892	// get child inode FS type
	2893	ctx_ptr = hal_remote_lpt( XPTR( child_cxy , &child_ptr->ctx ) );
	2894	fs_type = hal_remote_l32( XPTR( child_cxy , &ctx_ptr->type ) );
	2895
[630]	2896	//////////////////////////// create <.> dentry //////////////////////
[611]	2897	if( child_cxy == local_cxy )
	2898	{
	2899	error = vfs_dentry_create( fs_type,
	2900	".",
	2901	&dentry_xp );
	2902	}
	2903	else
	2904	{
	2905	rpc_vfs_dentry_create_client( child_cxy,
	2906	fs_type,
	2907	".",
	2908	&dentry_xp,
	2909	&error );
	2910	}
	2911	if( error )
	2912	{
	2913	printk("\n[ERROR] in %s : cannot create dentry <.> in cluster %x\n",
	2914	__FUNCTION__ , child_cxy );
	2915	return -1;
	2916	}
	2917
	2918	// get <.> dentry local pointer
	2919	dentry_ptr = GET_PTR( dentry_xp );
	2920
	2921	#if(DEBUG_VFS_ADD_SPECIAL & 1)
[630]	2922	cycle = (uint32_t)hal_get_cycles();
[611]	2923	if( DEBUG_VFS_ADD_SPECIAL < cycle )
[630]	2924	printk("\n[%s] thread[%x,%x] created dentry <.> (%x,%x) / cycle %d\n",
	2925	__FUNCTION__, this->process->pid, this->trdid, child_cxy, dentry_ptr, cycle );
[611]	2926	#endif
	2927
	2928	// register <.> dentry in child inode xhtab of children
	2929	children_xhtab_xp = XPTR( child_cxy , &child_ptr->children );
	2930	children_entry_xp = XPTR( child_cxy , &dentry_ptr->children );
	2931	error = xhtab_insert( children_xhtab_xp , "." , children_entry_xp );
	2932	if( error )
	2933	{
	2934	printk("\n[ERROR] in %s : cannot register dentry <.> in xhtab\n",
	2935	__FUNCTION__ );
	2936	return -1;
	2937	}
	2938
[612]	2939
	2940	// don't register <.> dentry in child_inode xlist of parents
	2941	// parents_root_xp = XPTR( child_cxy , &child_ptr->parents );
	2942	// parents_entry_xp = XPTR( child_cxy , &dentry_ptr->parents );
	2943	// xlist_add_first( parents_root_xp , parents_entry_xp );
	2944	// hal_remote_atomic_add( XPTR( child_cxy , &child_ptr->links ) , 1 );
[611]	2945
	2946	// update "parent" and "child_xp" fields in <.> dentry
	2947	hal_remote_s64( XPTR( child_cxy , &dentry_ptr->child_xp ) , child_xp );
	2948	hal_remote_spt( XPTR( child_cxy , &dentry_ptr->parent ) , child_ptr );
	2949
	2950	#if(DEBUG_VFS_ADD_SPECIAL & 1)
[630]	2951	cycle = (uint32_t)hal_get_cycles();
[611]	2952	if( DEBUG_VFS_ADD_SPECIAL < cycle )
[630]	2953	printk("\n[%s] thread[%x,%x] linked dentry <.> to parent and child inodes / cycle %d\n",
	2954	__FUNCTION__, this->process->pid, this->trdid, cycle );
[611]	2955	#endif
	2956
	2957	// introduce <.> dentry into child directory mapper
[630]	2958	// only if the target directory is not the root VFS
	2959	if( child_xp != parent_xp )
[611]	2960	{
[630]	2961	if( child_cxy == local_cxy )
	2962	{
	2963	error = vfs_fs_add_dentry( child_ptr,
	2964	dentry_ptr );
	2965	}
	2966	else
	2967	{
	2968	rpc_vfs_fs_add_dentry_client( child_cxy,
	2969	child_ptr,
	2970	dentry_ptr,
	2971	&error );
	2972	}
	2973	if( error )
	2974	{
	2975	printk("\n[ERROR] in %s : cannot introduce dentry <..> in mapper %x\n",
	2976	__FUNCTION__ );
	2977	return -1;
	2978	}
[611]	2979
	2980	#if(DEBUG_VFS_ADD_SPECIAL & 1)
[630]	2981	cycle = (uint32_t)hal_get_cycles();
[611]	2982	if( DEBUG_VFS_ADD_SPECIAL < cycle )
[630]	2983	printk("\n[%s] thread[%x,%x] registered dentry <.> in child mapper / cycle %d\n",
	2984	__FUNCTION__, this->process->pid, this->trdid, cycle );
[611]	2985	#endif
	2986
[630]	2987	}
	2988
	2989	///////////////////////////// create <..> dentry ///////////////////////
[611]	2990	if( child_cxy == local_cxy )
	2991	{
	2992	error = vfs_dentry_create( fs_type,
	2993	"..",
	2994	&dentry_xp );
	2995	}
	2996	else
	2997	{
	2998	rpc_vfs_dentry_create_client( child_cxy,
	2999	fs_type,
	3000	"..",
	3001	&dentry_xp,
	3002	&error );
	3003	}
	3004	if( error )
	3005	{
	3006	printk("\n[ERROR] in %s : cannot create dentry <..> in cluster %x\n",
	3007	__FUNCTION__ , child_cxy );
	3008	return -1;
	3009	}
	3010
	3011	// get <..> dentry local pointer
	3012	dentry_ptr = GET_PTR( dentry_xp );
	3013
	3014	#if(DEBUG_VFS_ADD_SPECIAL & 1)
[630]	3015	cycle = (uint32_t)hal_get_cycles();
[611]	3016	if( DEBUG_VFS_ADD_SPECIAL < cycle )
[630]	3017	printk("\n[%s] thread[%x,%x] created dentry <..> (%x,%x) / cycle %d\n",
	3018	__FUNCTION__, this->process->pid, this->trdid, child_cxy, dentry_ptr, cycle );
[611]	3019	#endif
	3020
	3021	// register <..> dentry in child_inode xhtab of children
	3022	children_xhtab_xp = XPTR( child_cxy , &child_ptr->children );
	3023	children_entry_xp = XPTR( child_cxy , &dentry_ptr->children );
	3024	error = xhtab_insert( children_xhtab_xp , ".." , children_entry_xp );
	3025	if( error )
	3026	{
	3027	printk("\n[ERROR] in %s : cannot register dentry <..> in xhtab\n",
	3028	__FUNCTION__ );
	3029	return -1;
	3030	}
	3031
[612]	3032	// don't register <..> dentry in parent_inode xlist of parents
[611]	3033
	3034	// update "parent" and "child_xp" fields in <..> dentry
	3035	hal_remote_s64( XPTR( child_cxy , &dentry_ptr->child_xp ) , parent_xp );
	3036	hal_remote_spt( XPTR( child_cxy , &dentry_ptr->parent ) , child_ptr );
	3037
	3038	#if(DEBUG_VFS_ADD_SPECIAL & 1)
[630]	3039	cycle = (uint32_t)hal_get_cycles();
[611]	3040	if( DEBUG_VFS_ADD_SPECIAL < cycle )
[630]	3041	printk("\n[%s] thread[%x,%x] linked dentry <..> to parent and child inodes / cycle %d\n",
	3042	__FUNCTION__, this->process->pid, this->trdid, cycle );
[611]	3043	#endif
	3044
	3045	// introduce <..> dentry into child directory mapper
[630]	3046	// only if the target directory is not the root VFS
	3047	if( child_xp != parent_xp )
[611]	3048	{
[630]	3049	if( child_cxy == local_cxy )
	3050	{
	3051	error = vfs_fs_add_dentry( child_ptr,
	3052	dentry_ptr );
	3053	}
	3054	else
	3055	{
	3056	rpc_vfs_fs_add_dentry_client( child_cxy,
	3057	child_ptr,
	3058	dentry_ptr,
	3059	&error );
	3060	}
	3061	if( error )
	3062	{
	3063	printk("\n[ERROR] in %s : cannot introduce dentry <..> in mapper %x\n",
	3064	__FUNCTION__ );
	3065	return -1;
	3066	}
[611]	3067
	3068	#if(DEBUG_VFS_ADD_SPECIAL & 1)
[630]	3069	cycle = (uint32_t)hal_get_cycles();
[611]	3070	if( DEBUG_VFS_ADD_SPECIAL < cycle )
[630]	3071	printk("\n[%s] thread[%x,%x] registered dentry <..> in child mapper / cycle %d\n",
	3072	__FUNCTION__, this->process->pid, this->trdid, cycle );
[611]	3073	#endif
	3074
[630]	3075	}
	3076
[611]	3077	#if DEBUG_VFS_ADD_SPECIAL
	3078	cycle = (uint32_t)hal_get_cycles();
	3079	if( DEBUG_VFS_ADD_SPECIAL < cycle )
[612]	3080	printk("\n[%s] thread[%x,%x] exit for child <%s> in parent <%s> / cycle %d\n",
	3081	__FUNCTION__, this->process->pid, this->trdid, child_name, parent_name, cycle );
[611]	3082	#endif
	3083
	3084	return 0;
	3085
	3086	} // end vfs_add_special_dentries()
	3087
[610]	3088	//////////////////////////////////////////
	3089	error_t vfs_get_path( xptr_t inode_xp,
	3090	char * buffer,
	3091	char ** first,
	3092	uint32_t max_size )
[1]	3093	{
[610]	3094	xptr_t dentry_xp; // extended pointer on current dentry
	3095	vfs_dentry_t * dentry_ptr; // local pointer on current dentry
	3096	cxy_t dentry_cxy; // current dentry cluster identifier
	3097	xptr_t name_xp; // extended pointer on current dentry name
	3098	uint32_t length; // length of current dentry name
	3099	int32_t index; // slot index in buffer
	3100	xptr_t current_xp; // extended pointer on current inode
	3101	vfs_inode_t * current_ptr; // local pointer on current inode
	3102	cxy_t current_cxy; // current inode cluster identifier
	3103	xptr_t vfs_root_xp; // extended pointer on VFS root inode
	3104	vfs_inode_t * vfs_root_ptr; // local pointer on VFS root inode
	3105	cxy_t vfs_root_cxy; // VFS root inode cluster identifier
	3106	xptr_t lock_xp; // extended pointer on Inode Tree lock
	3107	xptr_t parents_root_xp; // extended pointer on current inode parents root
	3108	bool_t found; // condition to exit the while loop
[1]	3109
[610]	3110	thread_t * this = CURRENT_THREAD;
	3111	process_t * process = this->process;
[1]	3112
[610]	3113	#if DEBUG_VFS_GET_PATH
	3114	uint32_t cycle = (uint32_t)hal_get_cycles();
	3115	if( DEBUG_VFS_GET_PATH < cycle )
	3116	printk("\n[%s] thread[%x,%x] enter : inode (%x,%x) / cycle %d\n",
	3117	__FUNCTION__ , process->pid, this->trdid,
	3118	GET_CXY( inode_xp ), GET_PTR( inode_xp ), cycle );
	3119	#endif
	3120
	3121	// set the NUL character in buffer / initialise buffer index
[1]	3122	buffer[max_size - 1] = 0;
[610]	3123	index = (int32_t)(max_size - 1);
[1]	3124
	3125	// initialize current inode
[610]	3126	current_xp = inode_xp;
[1]	3127
[610]	3128	// build extended pointer on lock protecting Inode Tree
	3129	vfs_root_xp = process->vfs_root_xp;
	3130	vfs_root_ptr = GET_PTR( vfs_root_xp );
	3131	vfs_root_cxy = GET_CXY( vfs_root_xp );
	3132	lock_xp = XPTR( vfs_root_cxy , &vfs_root_ptr->main_lock );
	3133
	3134	// take lock protecting Inode Tree in read mode
	3135	remote_rwlock_rd_acquire( lock_xp );
	3136
	3137	// traverse Inode Tree from target inode to VFS root
	3138	// selecting always the first parent dentry
	3139	// the buffer is written in "reverse order" (from target inode to root)
	3140	// exit the while loop when the VFS root has been found
[1]	3141	do
	3142	{
[610]	3143	// get current inode cluster and local pointer
	3144	current_cxy = GET_CXY( current_xp );
	3145	current_ptr = GET_PTR( current_xp );
[1]	3146
[610]	3147	// build extended pointer on parents dentries root
	3148	parents_root_xp = XPTR( current_cxy , &current_ptr->parents );
[1]	3149
[610]	3150	// compute exit condition <=> current inode is VFS root
	3151	found = xlist_is_empty( parents_root_xp );
[1]	3152
[610]	3153	if( found ) // parent is the VFS root
	3154	{
	3155	if( index == (int32_t)(max_size - 1) )
	3156	{
	3157	// update index
	3158	index--;
	3159
	3160	// set separator
	3161	buffer[index] = '/';
[1]	3162
[610]	3163	// check buffer overflow
[625]	3164	assert( (index >= 0) , "kernel buffer too small" );
[1]	3165
[610]	3166	}
	3167	}
	3168	else // not the VFS root
[1]	3169	{
[610]	3170	// get first parent dentry cluster and pointers
	3171	dentry_xp = XLIST_FIRST( parents_root_xp , vfs_dentry_t , parents );
	3172	dentry_cxy = GET_CXY( dentry_xp );
	3173	dentry_ptr = GET_PTR( dentry_xp );
[1]	3174
[610]	3175	// get extended pointer on dentry name and name length
	3176	name_xp = XPTR( dentry_cxy , dentry_ptr->name );
	3177	length = hal_remote_l32( XPTR( dentry_cxy , &dentry_ptr->length ) );
[1]	3178
[610]	3179	#if (DEBUG_VFS_GET_PATH & 1)
	3180	char debug_name[CONFIG_VFS_MAX_NAME_LENGTH];
	3181	hal_remote_strcpy( XPTR( local_cxy , debug_name ) , name_xp );
	3182	if( DEBUG_VFS_GET_PATH < cycle )
	3183	printk("\n[%s] thread(%x,%s) get current dentry <%s> in cluster %x\n",
	3184	__FUNCTION__ , process->pid, this->trdid, debug_name, current_cxy );
	3185	#endif
	3186	// update index
	3187	index -= (length + 1);
	3188
	3189	// check buffer overflow
[625]	3190	assert( (index >= 0) , "kernel buffer too small" );
[610]	3191
	3192	// update pathname
	3193	hal_remote_memcpy( XPTR( local_cxy , &buffer[index + 1] ) ,
	3194	name_xp , length );
	3195
	3196	// set separator
	3197	buffer[index] = '/';
	3198
	3199	// get extended pointer on parent inode
	3200	current_xp = XPTR( dentry_cxy ,
	3201	hal_remote_lpt( XPTR( dentry_cxy , &dentry_ptr->parent ) ) );
	3202	}
[1]	3203	}
[610]	3204	while( found == false );
[1]	3205
[610]	3206	// release lock protecting Inode Tree in read mode
	3207	remote_rwlock_rd_release( lock_xp );
	3208
	3209	#if DEBUG_VFS_GET_PATH
	3210	cycle = (uint32_t)hal_get_cycles();
	3211	if( DEBUG_VFS_GET_PATH < cycle )
	3212	printk("\n[%s] thread[%x,%x] exit : path <%s> / cycle %d\n",
	3213	__FUNCTION__ , process->pid, this->trdid, &buffer[index], cycle );
	3214	#endif
	3215
	3216	// return pointer on first character in buffer
	3217	*first = &buffer[index];
[1]	3218	return 0;
	3219
	3220	} // end vfs_get_path()
	3221
[188]	3222
[602]	3223	////////////////////////////////////////////////////////////////////
[610]	3224	error_t vfs_add_child_in_parent( cxy_t child_cxy,
[23]	3225	vfs_fs_type_t fs_type,
[602]	3226	xptr_t parent_inode_xp,
[23]	3227	char * name,
[610]	3228	xptr_t * child_dentry_xp,
[602]	3229	xptr_t * child_inode_xp )
[1]	3230	{
[610]	3231	error_t error;
	3232	cxy_t parent_cxy; // parent inode cluster identifier
	3233	vfs_inode_t * parent_inode_ptr; // parent inode local pointer
	3234	xptr_t new_dentry_xp; // extended pointer on created dentry
	3235	vfs_dentry_t * new_dentry_ptr; // created dentry local pointer
	3236	xptr_t new_inode_xp; // extended pointer on created child inode
	3237	vfs_inode_t * new_inode_ptr; // local pointer on created child inode
[1]	3238
[610]	3239	xptr_t parents_root_xp; // extended pointer on child inode "parents" field
	3240	xptr_t parents_entry_xp; // extended pointer on child dentry "parents" field
	3241	xptr_t children_xhtab_xp; // extended pointer on parent inode "children" field
	3242	xptr_t children_entry_xp; // extended pointer on child dentry "children" field
	3243
	3244	// get parent inode cluster and pointer
	3245	parent_cxy = GET_CXY( parent_inode_xp );
[602]	3246	parent_inode_ptr = GET_PTR( parent_inode_xp );
[1]	3247
[438]	3248	#if DEBUG_VFS_ADD_CHILD
[602]	3249	char parent_name[CONFIG_VFS_MAX_NAME_LENGTH];
	3250	vfs_inode_get_name( parent_inode_xp , parent_name );
[433]	3251	uint32_t cycle = (uint32_t)hal_get_cycles();
[568]	3252	thread_t * this = CURRENT_THREAD;
[438]	3253	if( DEBUG_VFS_ADD_CHILD < cycle )
[610]	3254	printk("\n[%s] thread[%x,%x] enter / child <%s> / parent <%s> / cycle %d\n",
	3255	__FUNCTION__, this->process->pid, this->trdid, name,
	3256	parent_name, (uint32_t)hal_get_cycles() );
[433]	3257	#endif
[279]	3258
[610]	3259	// 1. create dentry in parent cluster
	3260	if( parent_cxy == local_cxy ) // parent cluster is local
[1]	3261	{
[23]	3262	error = vfs_dentry_create( fs_type,
[1]	3263	name,
[602]	3264	&new_dentry_xp );
[1]	3265	}
[610]	3266	else // parent cluster is remote
[1]	3267	{
[610]	3268	rpc_vfs_dentry_create_client( parent_cxy,
[23]	3269	fs_type,
[1]	3270	name,
[602]	3271	&new_dentry_xp,
[1]	3272	&error );
	3273	}
	3274
	3275	if( error )
	3276	{
[437]	3277	printk("\n[ERROR] in %s : cannot create dentry <%s> in cluster %x\n",
[610]	3278	__FUNCTION__ , name , parent_cxy );
[602]	3279	return -1;
[1]	3280	}
	3281
[602]	3282	// get dentry local pointer
	3283	new_dentry_ptr = GET_PTR( new_dentry_xp );
	3284
[568]	3285	#if(DEBUG_VFS_ADD_CHILD & 1)
	3286	if( DEBUG_VFS_ADD_CHILD < cycle )
[610]	3287	printk("\n[%s] thread[%x,%x] / dentry <%s> created (%x,%x)\n",
	3288	__FUNCTION__, this->process->pid, this->trdid, name, parent_cxy, new_dentry_ptr );
[568]	3289	#endif
	3290
[610]	3291	// 2. create child inode in child cluster
	3292	// TODO : define attr / mode / uid / gid
[1]	3293	uint32_t attr = 0;
	3294	uint32_t mode = 0;
	3295	uint32_t uid = 0;
	3296	uint32_t gid = 0;
	3297
[610]	3298	if( child_cxy == local_cxy ) // child cluster is local
[1]	3299	{
[610]	3300	error = vfs_inode_create( fs_type,
[1]	3301	attr,
	3302	mode,
	3303	uid,
	3304	gid,
[602]	3305	&new_inode_xp );
[1]	3306	}
	3307	else // child cluster is remote
	3308	{
[610]	3309	rpc_vfs_inode_create_client( child_cxy,
[23]	3310	fs_type,
[1]	3311	attr,
	3312	mode,
	3313	uid,
	3314	gid,
[602]	3315	&new_inode_xp,
[1]	3316	&error );
	3317	}
	3318
	3319	if( error )
	3320	{
	3321	printk("\n[ERROR] in %s : cannot create inode in cluster %x\n",
[610]	3322	__FUNCTION__ , child_cxy );
[1]	3323
[610]	3324	if( parent_cxy == local_cxy ) vfs_dentry_destroy( new_dentry_ptr );
	3325	else rpc_vfs_dentry_destroy_client( parent_cxy , new_dentry_ptr );
[602]	3326	return -1;
[1]	3327	}
	3328
[610]	3329	// get new inode local pointer
	3330	new_inode_ptr = GET_PTR( new_inode_xp );
	3331
[568]	3332	#if(DEBUG_VFS_ADD_CHILD & 1)
	3333	if( DEBUG_VFS_ADD_CHILD < cycle )
[610]	3334	printk("\n[%s] thread[%x,%x] / inode <%s> created (%x,%x)\n",
	3335	__FUNCTION__ , this->process->pid, this->trdid, name , child_cxy, new_inode_ptr );
[568]	3336	#endif
	3337
[635]	3338
[610]	3339	// 3. register new_dentry in new_inode xlist of parents
	3340	parents_root_xp = XPTR( child_cxy , &new_inode_ptr->parents );
	3341	parents_entry_xp = XPTR( parent_cxy, &new_dentry_ptr->parents );
	3342	xlist_add_first( parents_root_xp , parents_entry_xp );
	3343	hal_remote_atomic_add( XPTR( child_cxy , &new_inode_ptr->links ) , 1 );
[204]	3344
[610]	3345	#if(DEBUG_VFS_ADD_CHILD & 1)
[611]	3346	if( DEBUG_VFS_ADD_CHILD < cycle )
[633]	3347	printk("\n[%s] thread[%x,%x] link dentry(%x,%x) to child inode(%x,%x)\n",
[610]	3348	__FUNCTION__, this->process->pid, this->trdid,
	3349	parent_cxy, new_dentry_ptr, child_cxy, new_inode_ptr );
	3350	#endif
	3351
[626]	3352	// 4. register new_dentry in parent_inode xhtab of children
[610]	3353	children_xhtab_xp = XPTR( parent_cxy , &parent_inode_ptr->children );
	3354	children_entry_xp = XPTR( parent_cxy , &new_dentry_ptr->children );
	3355	xhtab_insert( children_xhtab_xp , name , children_entry_xp );
	3356
	3357	#if(DEBUG_VFS_ADD_CHILD & 1)
	3358	if( DEBUG_VFS_ADD_CHILD < cycle )
[633]	3359	printk("\n[%s] thread[%x,%x] link dentry(%x,%x) to parent inode(%x,%x)\n",
[610]	3360	__FUNCTION__, this->process->pid, this->trdid,
	3361	parent_cxy, new_dentry_ptr, parent_cxy, parent_inode_ptr );
	3362	#endif
	3363
[626]	3364	// 5. update "parent" and "child_xp" fields in new_dentry
[610]	3365	hal_remote_s64( XPTR( parent_cxy , &new_dentry_ptr->child_xp ) , new_inode_xp );
	3366	hal_remote_spt( XPTR( parent_cxy , &new_dentry_ptr->parent ) , parent_inode_ptr );
	3367
[438]	3368	#if DEBUG_VFS_ADD_CHILD
[433]	3369	cycle = (uint32_t)hal_get_cycles();
[438]	3370	if( DEBUG_VFS_ADD_CHILD < cycle )
[598]	3371	printk("\n[%s] thread[%x,%x] exit for <%s> / cycle %d\n",
[633]	3372	__FUNCTION__, this->process->pid, this->trdid, name, cycle );
[433]	3373	#endif
[296]	3374
[602]	3375	// return extended pointer on dentry & child inode
[610]	3376	*child_dentry_xp = new_dentry_xp;
	3377	*child_inode_xp = new_inode_xp;
[1]	3378	return 0;
	3379
	3380	} // end vfs_add_child_in_parent()
	3381
[610]	3382	/////////////////////////////////////////////////////
	3383	void vfs_remove_child_from_parent( xptr_t dentry_xp )
[459]	3384	{
[610]	3385	cxy_t parent_cxy; // parent inode cluster identifier
	3386	cxy_t child_cxy; // child inode cluster identifier
	3387	vfs_dentry_t * dentry_ptr; // local pointer on dentry
	3388	xptr_t child_inode_xp; // extended pointer on child inode
	3389	vfs_inode_t * child_inode_ptr; // local pointer on child inode
	3390	vfs_inode_t * parent_inode_ptr; // local pointer on parent inode
	3391	uint32_t links; // number of child inode parents
	3392
	3393	char dentry_name[CONFIG_VFS_MAX_NAME_LENGTH];
[459]	3394
[610]	3395	// get parent cluster and dentry local pointer
	3396	parent_cxy = GET_CXY( dentry_xp );
[459]	3397	dentry_ptr = GET_PTR( dentry_xp );
	3398
[610]	3399	// get a local copy of dentry name
	3400	hal_remote_strcpy( XPTR( local_cxy , dentry_name ),
	3401	XPTR( parent_cxy , &dentry_ptr->name ) );
[459]	3402
[610]	3403	// get parent_inode local pointer
	3404	parent_inode_ptr = hal_remote_lpt( XPTR( parent_cxy , &dentry_ptr->parent ) );
	3405
	3406	// get child cluster and child_inode pointers
	3407	child_inode_xp = hal_remote_l64( XPTR( parent_cxy , &dentry_ptr->child_xp ) );
	3408	child_cxy = GET_CXY( child_inode_xp );
	3409	child_inode_ptr = GET_PTR( child_inode_xp );
[602]	3410
[610]	3411	// remove dentry from parent_inode
	3412	xhtab_remove( XPTR( parent_cxy , &parent_inode_ptr->children ),
	3413	dentry_name,
	3414	XPTR( parent_cxy , &dentry_ptr->children ) );
[602]	3415
[610]	3416	// remove dentry from child_inode
	3417	xlist_unlink( XPTR( parent_cxy , &dentry_ptr->parents ) );
	3418	links = hal_remote_atomic_add( XPTR( child_cxy , &child_inode_ptr->links ) , -1 );
	3419
	3420	// delete dentry descriptor
	3421	if( parent_cxy == local_cxy )
[459]	3422	{
[602]	3423	vfs_dentry_destroy( dentry_ptr );
[459]	3424	}
	3425	else
	3426	{
[610]	3427	rpc_vfs_dentry_destroy_client( parent_cxy,
[602]	3428	dentry_ptr );
[459]	3429	}
	3430
[610]	3431	// delete child_inode descriptor if last link
	3432	if( links == 1 )
[459]	3433	{
[610]	3434	if( child_cxy == local_cxy )
	3435	{
	3436	vfs_inode_destroy( child_inode_ptr );
	3437	}
	3438	else
	3439	{
	3440	rpc_vfs_inode_destroy_client( child_cxy , child_inode_ptr );
	3441	}
[459]	3442	}
	3443
	3444	} // end vfs_remove_child_from_parent()
	3445
[612]	3446
	3447
	3448
[23]	3449	//////////////////////////////////////////////////////////////////////////////////////////
[602]	3450	// API used by VFS to access a specific FS
[23]	3451	//////////////////////////////////////////////////////////////////////////////////////////
	3452
[614]	3453	//////////////////////////////////////////////
	3454	error_t vfs_fs_move_page( xptr_t page_xp,
	3455	cmd_type_t cmd_type )
[23]	3456	{
[204]	3457	error_t error = 0;
[23]	3458
[625]	3459	assert( (page_xp != XPTR_NULL) , "page pointer is NULL" );
[23]	3460
[602]	3461	page_t * page_ptr = GET_PTR( page_xp );
	3462	cxy_t page_cxy = GET_CXY( page_xp );
[23]	3463
[602]	3464	// get local pointer on page mapper
	3465	mapper_t * mapper = hal_remote_lpt( XPTR( page_cxy , &page_ptr->mapper ) );
[23]	3466
[625]	3467	assert( (mapper != NULL) , "no mapper for page" );
[246]	3468
[23]	3469	// get FS type
[602]	3470	vfs_fs_type_t fs_type = hal_remote_l32( XPTR( page_cxy , &mapper->type ) );
[23]	3471
[238]	3472	// call relevant FS function
[23]	3473	if( fs_type == FS_TYPE_FATFS )
	3474	{
[614]	3475	error = fatfs_move_page( page_xp , cmd_type );
[602]	3476	}
	3477	else if( fs_type == FS_TYPE_RAMFS )
	3478	{
	3479	assert( false , "should not be called for RAMFS\n" );
	3480	}
	3481	else if( fs_type == FS_TYPE_DEVFS )
	3482	{
	3483	assert( false , "should not be called for DEVFS\n" );
	3484	}
	3485	else
	3486	{
[625]	3487	assert( false , "undefined file system type" );
[602]	3488	}
[568]	3489
[602]	3490	return error;
[568]	3491
[602]	3492	} // end vfs_fs_move_page()
	3493
	3494	////////////////////////////////////////////////
	3495	error_t vfs_fs_add_dentry( vfs_inode_t * inode,
	3496	vfs_dentry_t * dentry )
	3497	{
	3498	error_t error = 0;
	3499
[625]	3500	assert( (inode != NULL) , "inode pointer is NULL" );
	3501	assert( (dentry != NULL) , "dentry pointer is NULL" );
[602]	3502
	3503	mapper_t * mapper = inode->mapper;
	3504
[625]	3505	assert( (mapper != NULL) , "mapper pointer is NULL" );
[602]	3506
	3507	// get FS type
	3508	vfs_fs_type_t fs_type = mapper->type;
	3509
	3510	// call relevant FS function
	3511	if( fs_type == FS_TYPE_FATFS )
	3512	{
	3513	error = fatfs_add_dentry( inode , dentry );
[23]	3514	}
	3515	else if( fs_type == FS_TYPE_RAMFS )
	3516	{
[612]	3517	error = 0; // does nothing for RAMFS
[23]	3518	}
	3519	else if( fs_type == FS_TYPE_DEVFS )
	3520	{
[612]	3521	error = 0; // does nothing for DEVFS
[23]	3522	}
	3523	else
	3524	{
[625]	3525	assert( false , "undefined file system type" );
[23]	3526	}
	3527
	3528	return error;
	3529
[602]	3530	} // end vfs_fs_add_dentry()
[23]	3531
[602]	3532	///////////////////////////////////////////////////
	3533	error_t vfs_fs_remove_dentry( vfs_inode_t * inode,
	3534	vfs_dentry_t * dentry )
[23]	3535	{
[602]	3536	error_t error = 0;
[23]	3537
[625]	3538	assert( (inode != NULL) , "inode pointer is NULL" );
	3539	assert( (dentry != NULL) , "dentry pointer is NULL" );
[23]	3540
[238]	3541	mapper_t * mapper = inode->mapper;
[23]	3542
[625]	3543	assert( (mapper != NULL) , "mapper pointer is NULL" );
[23]	3544
[602]	3545	// get FS type
	3546	vfs_fs_type_t fs_type = mapper->type;
[401]	3547
[602]	3548	// call relevant FS function
	3549	if( fs_type == FS_TYPE_FATFS )
	3550	{
	3551	error = fatfs_remove_dentry( inode , dentry );
	3552	}
	3553	else if( fs_type == FS_TYPE_RAMFS )
	3554	{
[612]	3555	error = 0; // does nothing for RAMFS
[602]	3556	}
	3557	else if( fs_type == FS_TYPE_DEVFS )
	3558	{
[612]	3559	error = 0; // does nothing for DEVFS
[602]	3560	}
	3561	else
	3562	{
[625]	3563	assert( false , "undefined file system type" );
[602]	3564	}
[238]	3565
[602]	3566	return error;
	3567
	3568	} // end vfs_fs_remove_dentry()
	3569
	3570	////////////////////////////////////////////////
[623]	3571	error_t vfs_fs_new_dentry( vfs_inode_t * parent,
[602]	3572	char * name,
	3573	xptr_t child_xp )
	3574	{
	3575	error_t error = 0;
	3576
	3577	// check arguments
[625]	3578	assert( (parent != NULL) , "parent pointer is NULL");
	3579	assert( (child_xp != XPTR_NULL) , "child pointer is NULL");
[602]	3580
	3581	// get parent inode FS type
	3582	vfs_fs_type_t fs_type = parent->ctx->type;
	3583
	3584	// call relevant FS function
	3585	if( fs_type == FS_TYPE_FATFS )
[23]	3586	{
[623]	3587	error = fatfs_new_dentry( parent , name , child_xp );
[602]	3588	}
	3589	else if( fs_type == FS_TYPE_RAMFS )
	3590	{
[625]	3591	assert( false , "should not be called for RAMFS" );
[602]	3592	}
	3593	else if( fs_type == FS_TYPE_DEVFS )
	3594	{
[625]	3595	assert( false , "should not be called for DEVFS" );
[602]	3596	}
	3597	else
	3598	{
[625]	3599	assert( false , "undefined file system type" );
[602]	3600	}
[23]	3601
[602]	3602	return error;
	3603
[623]	3604	} // end vfs_fs_new_dentry()
[602]	3605
[612]	3606	///////////////////////////////////////////////////
[623]	3607	error_t vfs_fs_update_dentry( vfs_inode_t * inode,
	3608	vfs_dentry_t * dentry,
	3609	uint32_t size )
	3610	{
	3611	error_t error = 0;
	3612
	3613	// check arguments
[625]	3614	assert( (inode != NULL) , "inode pointer is NULL");
	3615	assert( (dentry != NULL) , "dentry pointer is NULL");
[623]	3616
	3617	// get parent inode FS type
	3618	vfs_fs_type_t fs_type = inode->ctx->type;
	3619
	3620	// call relevant FS function
	3621	if( fs_type == FS_TYPE_FATFS )
	3622	{
	3623	error = fatfs_update_dentry( inode , dentry , size );
	3624	}
	3625	else if( fs_type == FS_TYPE_RAMFS )
	3626	{
[625]	3627	assert( false , "should not be called for RAMFS" );
[623]	3628	}
	3629	else if( fs_type == FS_TYPE_DEVFS )
	3630	{
[625]	3631	assert( false , "should not be called for DEVFS" );
[623]	3632	}
	3633	else
	3634	{
[625]	3635	assert( false , "undefined file system type" );
[623]	3636	}
	3637
	3638	return error;
	3639
	3640	} // end vfs_fs_update_dentry()
	3641
	3642	///////////////////////////////////////////////////
[612]	3643	error_t vfs_fs_get_user_dir( vfs_inode_t * inode,
	3644	struct dirent * array,
	3645	uint32_t max_dirent,
	3646	uint32_t min_dentry,
	3647	bool_t detailed,
	3648	uint32_t * entries,
	3649	bool_t * done )
	3650	{
	3651	error_t error = 0;
	3652
	3653	// check arguments
[625]	3654	assert( (inode != NULL) , "parent pointer is NULL");
	3655	assert( (array != NULL) , "child pointer is NULL");
[612]	3656	assert( (detailed == false) , "detailed argument not supported\n");
	3657
	3658	// check inode type
	3659	if( inode->type != INODE_TYPE_DIR )
	3660	{
	3661	printk("\n[ERROR] in %s : target inode is not a directory\n",
	3662	__FUNCTION__ );
	3663	return -1;
	3664	}
	3665
	3666	// get parent inode FS type
	3667	vfs_fs_type_t fs_type = inode->ctx->type;
	3668
	3669	// call relevant FS function
	3670	if( fs_type == FS_TYPE_FATFS )
	3671	{
	3672	error = fatfs_get_user_dir( inode,
	3673	array,
	3674	max_dirent,
	3675	min_dentry,
	3676	detailed,
	3677	entries,
	3678	done );
	3679	}
	3680	else if( fs_type == FS_TYPE_RAMFS )
	3681	{
[625]	3682	assert( false , "should not be called for RAMFS" );
[612]	3683	}
	3684	else if( fs_type == FS_TYPE_DEVFS )
	3685	{
	3686	error = devfs_get_user_dir( inode,
	3687	array,
	3688	max_dirent,
	3689	min_dentry,
	3690	detailed,
	3691	entries,
	3692	done );
	3693	}
	3694	else
	3695	{
[625]	3696	assert( false , "undefined file system type" );
[612]	3697	}
	3698
	3699	return error;
	3700
	3701	} // end vfs_fs_get_user_dir()
	3702
[610]	3703	////////////////////////////////////////////////
	3704	error_t vfs_fs_sync_inode( vfs_inode_t * inode )
	3705	{
	3706	error_t error = 0;
	3707
	3708	// check arguments
[625]	3709	assert( (inode != NULL) , "inode pointer is NULL");
[610]	3710
	3711	// get inode FS type
	3712	vfs_fs_type_t fs_type = inode->ctx->type;
	3713
	3714	// call relevant FS function
	3715	if( fs_type == FS_TYPE_FATFS )
	3716	{
	3717	error = fatfs_sync_inode( inode );
	3718	}
	3719	else if( fs_type == FS_TYPE_RAMFS )
	3720	{
[625]	3721	assert( false , "should not be called for RAMFS" );
[610]	3722	}
	3723	else if( fs_type == FS_TYPE_DEVFS )
	3724	{
[625]	3725	assert( false , "should not be called for DEVFS" );
[610]	3726	}
	3727	else
	3728	{
[625]	3729	assert( false , "undefined file system type" );
[610]	3730	}
	3731
	3732	return error;
	3733
	3734	} // end vfs_fs_sync_inode()
	3735
	3736	////////////////////////////////////////////////
	3737	error_t vfs_fs_sync_fat( vfs_fs_type_t fs_type )
	3738	{
	3739	error_t error = 0;
	3740
	3741	// call relevant FS function
	3742	if( fs_type == FS_TYPE_FATFS )
	3743	{
	3744	error = fatfs_sync_fat();
	3745	}
	3746	else if( fs_type == FS_TYPE_RAMFS )
	3747	{
[625]	3748	assert( false , "should not be called for RAMFS" );
[610]	3749	}
	3750	else if( fs_type == FS_TYPE_DEVFS )
	3751	{
[625]	3752	assert( false , "should not be called for DEVFS" );
[610]	3753	}
	3754	else
	3755	{
[625]	3756	assert( false , "undefined file system type" );
[610]	3757	}
	3758
	3759	return error;
	3760
	3761	} // end vfs_fs_sync_fat()
	3762
	3763	//////////////////////////////////////////////////////
	3764	error_t vfs_fs_sync_free_info( vfs_fs_type_t fs_type )
	3765	{
	3766	error_t error = 0;
	3767
	3768	// call relevant FS function
	3769	if( fs_type == FS_TYPE_FATFS )
	3770	{
	3771	error = fatfs_sync_free_info();
	3772	}
	3773	else if( fs_type == FS_TYPE_RAMFS )
	3774	{
[625]	3775	assert( false , "should not be called for RAMFS" );
[610]	3776	}
	3777	else if( fs_type == FS_TYPE_DEVFS )
	3778	{
[625]	3779	assert( false , "should not be called for DEVFS" );
[610]	3780	}
	3781	else
	3782	{
[625]	3783	assert( false , "undefined file system type" );
[610]	3784	}
	3785
	3786	return error;
	3787
	3788	} // end vfs_fs_sync_fat()
	3789
[602]	3790	/////////////////////////////////////////////////
	3791	error_t vfs_fs_cluster_alloc( uint32_t fs_type,
	3792	uint32_t * cluster )
	3793	{
	3794	error_t error = 0;
	3795
	3796	// call relevant FS function
	3797	if( fs_type == FS_TYPE_FATFS )
	3798	{
	3799	error = fatfs_cluster_alloc( cluster );
[23]	3800	}
[602]	3801	else if( fs_type == FS_TYPE_RAMFS )
	3802	{
[625]	3803	assert( false , "should not be called for RAMFS" );
[602]	3804	}
	3805	else if( fs_type == FS_TYPE_DEVFS )
	3806	{
[625]	3807	assert( false , "should not be called for DEVFS" );
[602]	3808	}
	3809	else
	3810	{
[625]	3811	assert( false , "undefined file system type" );
[602]	3812	}
[23]	3813
[602]	3814	return error;
[401]	3815
[602]	3816	} // end vfs_fs_alloc_cluster()
[23]	3817
[602]	3818	////////////////////////////////////////////////
	3819	error_t vfs_fs_release_inode( xptr_t inode_xp )
	3820	{
	3821	error_t error = 0;
[23]	3822
[625]	3823	assert( (inode_xp != XPTR_NULL) , "inode pointer is NULL")
[602]	3824
	3825	vfs_inode_t * inode_ptr = GET_PTR( inode_xp );
	3826	cxy_t inode_cxy = GET_CXY( inode_xp );
	3827
	3828	// get local pointer on page mapper
	3829	mapper_t * mapper = hal_remote_lpt( XPTR( inode_cxy , &inode_ptr->mapper ) );
	3830
[625]	3831	assert( (mapper != NULL) , "mapper pointer is NULL")
[602]	3832
	3833	// get FS type from mapper
	3834	vfs_fs_type_t fs_type = hal_remote_l32( XPTR( inode_cxy , &mapper->type ) );
	3835
	3836	// call relevant FS function
	3837	if( fs_type == FS_TYPE_FATFS )
	3838	{
	3839	error = fatfs_release_inode( inode_xp );
	3840	}
	3841	else if( fs_type == FS_TYPE_RAMFS )
	3842	{
[625]	3843	assert( false , "should not be called for RAMFS" );
[602]	3844	}
	3845	else if( fs_type == FS_TYPE_DEVFS )
	3846	{
[625]	3847	assert( false , "should not be called for DEVFS" );
[602]	3848	}
	3849	else
	3850	{
[625]	3851	assert( false , "undefined file system type" );
[602]	3852	}
	3853
	3854	return error;
	3855
	3856	} // end vfs_fs_release_inode()
	3857
	3858

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