Subversion Repositories HelenOS

Rev

Rev 3629 | Rev 3634 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 3629 Rev 3633
Line 286... Line 286...
286 
 
 286 
 
287 
void *fat_create_node(dev_handle_t dev_handle, int flags)
 287 
void *fat_create_node(dev_handle_t dev_handle, int flags)
288 
{
 288 
{
289 
    fat_idx_t *idxp;
 289 
    fat_idx_t *idxp;
290 
    fat_node_t *nodep;
 290 
    fat_node_t *nodep;
- 
 
 291 
    fat_bs_t *bs;
- 
 
 292 
    fat_cluster_t mcl, lcl;
- 
 
 293 
    uint16_t bps;
- 
 
 294 
    int rc;
- 
 
 295 
 
- 
 
 296 
    bs = block_bb_get(dev_handle);
- 
 
 297 
    bps = uint16_t_le2host(bs->bps);
- 
 
 298 
    if (flags & L_DIRECTORY) {
- 
 
 299 
        /* allocate a cluster */
- 
 
 300 
        rc = fat_alloc_clusters(bs, dev_handle, 1, &mcl, &lcl);
- 
 
 301 
        if (rc != EOK)
- 
 
 302 
            return NULL;
- 
 
 303 
    }
291 
 
 304 
 
292 
    nodep = fat_node_get_new();
 305 
    nodep = fat_node_get_new();
293 
    if (!nodep)
 306 
    if (!nodep) {
- 
 
 307 
        fat_free_clusters(bs, dev_handle, mcl);
294 
        return NULL;
 308 
        return NULL;
- 
 
 309 
    }
295 
    idxp = fat_idx_get_new(dev_handle);
 310 
    idxp = fat_idx_get_new(dev_handle);
296 
    if (!idxp) {
 311 
    if (!idxp) {
- 
 
 312 
        fat_free_clusters(bs, dev_handle, mcl);
297 
        fat_node_put(nodep);
 313 
        fat_node_put(nodep);
298 
        return NULL;
 314 
        return NULL;
299 
    }
 315 
    }
300 
    /* idxp->lock held */
 316 
    /* idxp->lock held */
301 
    if (flags & L_DIRECTORY) {
 317 
    if (flags & L_DIRECTORY) {
- 
 
 318 
        int i;
- 
 
 319 
        block_t *b;
- 
 
 320 
 
- 
 
 321 
        /*
- 
 
 322 
         * Populate the new cluster with unused dentries.
- 
 
 323 
         * We don't create the '.' and '..' entries, since they are
- 
 
 324 
         * optional and HelenOS VFS does not need them.
- 
 
 325 
         */
- 
 
 326 
        for (i = 0; i < bs->spc; i++) {
- 
 
 327 
            b = _fat_block_get(bs, dev_handle, mcl, i,
- 
 
 328 
                BLOCK_FLAGS_NOREAD);
- 
 
 329 
            /* mark all dentries as never-used */
- 
 
 330 
            memset(b->data, 0, bps);
- 
 
 331 
            b->dirty = false;
- 
 
 332 
            block_put(b);
- 
 
 333 
        }
302 
        nodep->type = FAT_DIRECTORY;
 334 
        nodep->type = FAT_DIRECTORY;
- 
 
 335 
        nodep->firstc = mcl;
- 
 
 336 
        nodep->size = bps * bs->spc;
303 
    } else {
 337 
    } else {
304 
        nodep->type = FAT_FILE;
 338 
        nodep->type = FAT_FILE;
- 
 
 339 
        nodep->firstc = FAT_CLST_RES0;
- 
 
 340 
        nodep->size = 0;
305 
    }
 341 
    }
306 
    nodep->size = 0;
 - 
 
307 
    nodep->firstc = FAT_CLST_RES0;
 - 
 
308 
    nodep->lnkcnt = 0;  /* not linked anywhere */
 342 
    nodep->lnkcnt = 0;  /* not linked anywhere */
309 
    nodep->refcnt = 1;
 343 
    nodep->refcnt = 1;
- 
 
 344 
    nodep->dirty = true;
310 
 
 345 
 
311 
    nodep->idx = idxp;
 346 
    nodep->idx = idxp;
312 
    idxp->nodep = nodep;
 347 
    idxp->nodep = nodep;
313 
 
 348 
 
314 
    futex_up(&idxp->lock);
 349 
    futex_up(&idxp->lock);