C++ (Cpp) smb_refill_dircache примеры использования

Пример #1

Файл: dir.c Проект: chinnyannieb/empeg-hijack

static int 
smb_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
	struct dentry *dentry = filp->f_dentry;
	struct inode *dir = dentry->d_inode;
	struct cache_head *cachep = NULL;
	int result;

	VERBOSE("reading %s/%s, f_pos=%d\n", DENTRY_PATH(dentry),
		(int) filp->f_pos);

	result = 0;
	switch ((unsigned int) filp->f_pos)
	{
	case 0:
		if (filldir(dirent, ".", 1, 0, dir->i_ino) < 0)
			goto out;
		filp->f_pos = 1;
	case 1:
		if (filldir(dirent, "..", 2, 1,
				dentry->d_parent->d_inode->i_ino) < 0)
			goto out;
		filp->f_pos = 2;
	}

	/*
	 * Make sure our inode is up-to-date.
	 */
	result = smb_revalidate_inode(dentry);
	if (result)
		goto out;
	/*
	 * Get the cache pointer ...
	 */
	result = -EIO;
	cachep = smb_get_dircache(dentry);
	if (!cachep)
		goto out;
	/*
	 * Make sure the cache is up-to-date.
	 *
	 * To detect changes on the server we refill on each "new" access.
	 *
	 * Directory mtime would be nice to use for finding changes,
	 * unfortunately some servers (NT4) doesn't update on local changes.
	 */
	if (!cachep->valid || filp->f_pos == 2)
	{
		result = smb_refill_dircache(cachep, dentry);
		if (result)
			goto out;
	}

	result = 0;

	while (1)
	{
		struct cache_dirent this_dirent, *entry = &this_dirent;

		if (!smb_find_in_cache(cachep, filp->f_pos, entry))
			break;
		/*
		 * Check whether to look up the inode number.
		 */
		if (!entry->ino) {
			struct qstr qname;
			/* N.B. Make cache_dirent name a qstr! */
			qname.name = entry->name;
			qname.len  = entry->len;
			entry->ino = find_inode_number(dentry, &qname);
			if (!entry->ino)
				entry->ino = smb_invent_inos(1);
		}

		if (filldir(dirent, entry->name, entry->len, 
				    filp->f_pos, entry->ino) < 0)
			break;
		filp->f_pos += 1;
	}

	/*
	 * Release the dircache.
	 */
out:
	if (cachep) {
		smb_free_dircache(cachep);
	}
	return result;
}

Пример #2

static int 
smb_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
	struct dentry *dentry = filp->f_dentry;
	struct inode *dir = dentry->d_inode;
	struct cache_head *cachep;
	int result;

#ifdef SMBFS_DEBUG_VERBOSE
printk("smb_readdir: reading %s/%s, f_pos=%d\n",
dentry->d_parent->d_name.name, dentry->d_name.name, (int) filp->f_pos);
#endif
	/*
	 * Make sure our inode is up-to-date.
	 */
	result = smb_revalidate_inode(dentry);
	if (result)
		goto out;
	/*
	 * Get the cache pointer ...
	 */
	result = -EIO;
	cachep = smb_get_dircache(dentry);
	if (!cachep)
		goto out;
	/*
	 * Make sure the cache is up-to-date.
	 */
	if (!cachep->valid)
	{
		result = smb_refill_dircache(cachep, dentry);
		if (result)
			goto out_free;
	}

	result = 0;
	switch ((unsigned int) filp->f_pos)
	{
	case 0:
		if (filldir(dirent, ".", 1, 0, dir->i_ino) < 0)
			goto out_free;
		filp->f_pos = 1;
	case 1:
		if (filldir(dirent, "..", 2, 1,
				dentry->d_parent->d_inode->i_ino) < 0)
			goto out_free;
		filp->f_pos = 2;
	}

	while (1)
	{
		struct cache_dirent this_dirent, *entry = &this_dirent;

		if (!smb_find_in_cache(cachep, filp->f_pos, entry))
			break;
		/*
		 * Check whether to look up the inode number.
		 */
		if (!entry->ino) {
			struct qstr qname;
			/* N.B. Make cache_dirent name a qstr! */
			qname.name = entry->name;
			qname.len  = entry->len;
			entry->ino = find_inode_number(dentry, &qname);
			if (!entry->ino)
				entry->ino = smb_invent_inos(1);
		}

		if (filldir(dirent, entry->name, entry->len, 
				    filp->f_pos, entry->ino) < 0)
			break;
		filp->f_pos += 1;
	}

	/*
	 * Release the dircache.
	 */
out_free:
	smb_free_dircache(cachep);
out:
	return result;
}