WebSVN – HelenOS – Diff – //branches/network/uspace/srv/fs/tmpfs/tmpfs_ops.c



 * For now, we don't distinguish between different dev_handles/instances. All
 * requests resolve to the only instance, rooted in the following variable.
 */
static tmpfs_dentry_t *root;
 
#define TMPFS_DEV       0   /**< Dummy device handle for TMPFS */
 
/*
 * Implementation of the libfs interface.
 */
 
/* Forward declarations of static functions. */
static void *tmpfs_match(void *, const char *);
static void *tmpfs_node_get(dev_handle_t, fs_index_t);
static void tmpfs_node_put(void *);
static void *tmpfs_create_node(dev_handle_t, int);
static int tmpfs_link_node(void *, void *, const char *);
static int tmpfs_unlink_node(void *, void *);
static int tmpfs_destroy_node(void *);
 
/* Implementation of helper functions. */
static fs_index_t tmpfs_index_get(void *nodep)

 
static bool tmpfs_init(void)
{
    if (!hash_table_create(&dentries, DENTRIES_BUCKETS, 1, &dentries_ops))
        return false;
    root = (tmpfs_dentry_t *) tmpfs_create_node(TMPFS_DEV, L_DIRECTORY);
    if (!root) {
        hash_table_destroy(&dentries);
        return false;
    }
    root->lnkcnt = 0;   /* FS root is not linked */

void tmpfs_node_put(void *node)
{
    /* nothing to do */
}
 
void *tmpfs_create_node(dev_handle_t dev_handle, int lflag)
{
    assert((lflag & L_FILE) ^ (lflag & L_DIRECTORY));
 
    tmpfs_dentry_t *node = malloc(sizeof(tmpfs_dentry_t));
    if (!node)

    unsigned long key = node->index;
    hash_table_insert(&dentries, &key, &node->dh_link);
    return (void *) node;
}
 
int tmpfs_link_node(void *prnt, void *chld, const char *nm)
{
    tmpfs_dentry_t *parentp = (tmpfs_dentry_t *) prnt;
    tmpfs_dentry_t *childp = (tmpfs_dentry_t *) chld;
 
    assert(parentp->type == TMPFS_DIRECTORY);
 
    tmpfs_name_t *namep = malloc(sizeof(tmpfs_name_t));
    if (!namep)
        return ENOMEM;
    tmpfs_name_initialize(namep);
    size_t len = strlen(nm);
    namep->name = malloc(len + 1);
    if (!namep->name) {
        free(namep);
        return ENOMEM;
    }
    strcpy(namep->name, nm);
    namep->parent = parentp;
   
    childp->lnkcnt++;

        tmp->sibling = childp;
    } else {
        parentp->child = childp;
    }
 
    return EOK;
}
 
int tmpfs_unlink_node(void *prnt, void *chld)
{
    tmpfs_dentry_t *parentp = (tmpfs_dentry_t *)prnt;

Rev 3386	Rev 4153
Line 62...	Line 62...
62	* For now, we don't distinguish between different dev_handles/instances. All	62	* For now, we don't distinguish between different dev_handles/instances. All
63	* requests resolve to the only instance, rooted in the following variable.	63	* requests resolve to the only instance, rooted in the following variable.
64	*/	64	*/
65	static tmpfs_dentry_t *root;	65	static tmpfs_dentry_t *root;
66		66
-		67	#define TMPFS_DEV 0 /*< Dummy device handle for TMPFS /
-		68
67	/*	69	/*
68	* Implementation of the libfs interface.	70	* Implementation of the libfs interface.
69	*/	71	*/
70		72
71	/* Forward declarations of static functions. */	73	/* Forward declarations of static functions. */
72	static void tmpfs_match(void , const char *);	74	static void tmpfs_match(void , const char *);
73	static void *tmpfs_node_get(dev_handle_t, fs_index_t);	75	static void *tmpfs_node_get(dev_handle_t, fs_index_t);
74	static void tmpfs_node_put(void *);	76	static void tmpfs_node_put(void *);
75	static void *tmpfs_create_node(int);	77	static void *tmpfs_create_node(dev_handle_t, int);
76	static bool tmpfs_link_node(void , void , const char *);	78	static int tmpfs_link_node(void , void , const char *);
77	static int tmpfs_unlink_node(void , void );	79	static int tmpfs_unlink_node(void , void );
78	static int tmpfs_destroy_node(void *);	80	static int tmpfs_destroy_node(void *);
79		81
80	/* Implementation of helper functions. */	82	/* Implementation of helper functions. */
81	static fs_index_t tmpfs_index_get(void *nodep)	83	static fs_index_t tmpfs_index_get(void *nodep)
Line 226...	Line 228...
226		228
227	static bool tmpfs_init(void)	229	static bool tmpfs_init(void)
228	{	230	{
229	if (!hash_table_create(&dentries, DENTRIES_BUCKETS, 1, &dentries_ops))	231	if (!hash_table_create(&dentries, DENTRIES_BUCKETS, 1, &dentries_ops))
230	return false;	232	return false;
231	root = (tmpfs_dentry_t *) tmpfs_create_node(L_DIRECTORY);	233	root = (tmpfs_dentry_t *) tmpfs_create_node(TMPFS_DEV, L_DIRECTORY);
232	if (!root) {	234	if (!root) {
233	hash_table_destroy(&dentries);	235	hash_table_destroy(&dentries);
234	return false;	236	return false;
235	}	237	}
236	root->lnkcnt = 0; /* FS root is not linked */	238	root->lnkcnt = 0; /* FS root is not linked */
Line 280...	Line 282...
280	void tmpfs_node_put(void *node)	282	void tmpfs_node_put(void *node)
281	{	283	{
282	/* nothing to do */	284	/* nothing to do */
283	}	285	}
284		286
285	void *tmpfs_create_node(int lflag)	287	void *tmpfs_create_node(dev_handle_t dev_handle, int lflag)
286	{	288	{
287	assert((lflag & L_FILE) ^ (lflag & L_DIRECTORY));	289	assert((lflag & L_FILE) ^ (lflag & L_DIRECTORY));
288		290
289	tmpfs_dentry_t *node = malloc(sizeof(tmpfs_dentry_t));	291	tmpfs_dentry_t *node = malloc(sizeof(tmpfs_dentry_t));
290	if (!node)	292	if (!node)
Line 304...	Line 306...
304	unsigned long key = node->index;	306	unsigned long key = node->index;
305	hash_table_insert(&dentries, &key, &node->dh_link);	307	hash_table_insert(&dentries, &key, &node->dh_link);
306	return (void *) node;	308	return (void *) node;
307	}	309	}
308		310
309	bool tmpfs_link_node(void prnt, void chld, const char *nm)	311	int tmpfs_link_node(void prnt, void chld, const char *nm)
310	{	312	{
311	tmpfs_dentry_t parentp = (tmpfs_dentry_t ) prnt;	313	tmpfs_dentry_t parentp = (tmpfs_dentry_t ) prnt;
312	tmpfs_dentry_t childp = (tmpfs_dentry_t ) chld;	314	tmpfs_dentry_t childp = (tmpfs_dentry_t ) chld;
313		315
314	assert(parentp->type == TMPFS_DIRECTORY);	316	assert(parentp->type == TMPFS_DIRECTORY);
315		317
316	tmpfs_name_t *namep = malloc(sizeof(tmpfs_name_t));	318	tmpfs_name_t *namep = malloc(sizeof(tmpfs_name_t));
317	if (!namep)	319	if (!namep)
318	return false;	320	return ENOMEM;
319	tmpfs_name_initialize(namep);	321	tmpfs_name_initialize(namep);
320	size_t len = strlen(nm);	322	size_t len = strlen(nm);
321	namep->name = malloc(len + 1);	323	namep->name = malloc(len + 1);
322	if (!namep->name) {	324	if (!namep->name) {
323	free(namep);	325	free(namep);
324	return false;	326	return ENOMEM;
325	}	327	}
326	strcpy(namep->name, nm);	328	strcpy(namep->name, nm);
327	namep->parent = parentp;	329	namep->parent = parentp;
328		330
329	childp->lnkcnt++;	331	childp->lnkcnt++;
Line 339...	Line 341...
339	tmp->sibling = childp;	341	tmp->sibling = childp;
340	} else {	342	} else {
341	parentp->child = childp;	343	parentp->child = childp;
342	}	344	}
343		345
344	return true;	346	return EOK;
345	}	347	}
346		348
347	int tmpfs_unlink_node(void prnt, void chld)	349	int tmpfs_unlink_node(void prnt, void chld)
348	{	350	{
349	tmpfs_dentry_t parentp = (tmpfs_dentry_t )prnt;	351	tmpfs_dentry_t parentp = (tmpfs_dentry_t )prnt;

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(root)//branches/network/uspace/srv/fs/tmpfs/tmpfs_ops.c – Rev 3386 → 4153