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