C++ (Cpp) ext3_acl_from_disk примеры использования

Пример #1

/*
 * Inode operation get_posix_acl().
 *
 * inode->i_mutex: don't care
 */
static struct posix_acl *
ext3_get_acl(struct inode *inode, int type)
{
	struct ext3_inode_info *ei = EXT3_I(inode);
	int name_index;
	char *value = NULL;
	struct posix_acl *acl;
	int retval;

	if (!test_opt(inode->i_sb, POSIX_ACL))
		return NULL;

	switch(type) {
		case ACL_TYPE_ACCESS:
			acl = ext3_iget_acl(inode, &ei->i_acl);
			if (acl != EXT3_ACL_NOT_CACHED)
				return acl;
			name_index = EXT3_XATTR_INDEX_POSIX_ACL_ACCESS;
			break;

		case ACL_TYPE_DEFAULT:
			acl = ext3_iget_acl(inode, &ei->i_default_acl);
			if (acl != EXT3_ACL_NOT_CACHED)
				return acl;
			name_index = EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT;
			break;

		default:
			return ERR_PTR(-EINVAL);
	}
	retval = ext3_xattr_get(inode, name_index, "", NULL, 0);
	if (retval > 0) {
		value = kmalloc(retval, GFP_KERNEL);
		if (!value)
			return ERR_PTR(-ENOMEM);
		retval = ext3_xattr_get(inode, name_index, "", value, retval);
	}
	if (retval > 0)
		acl = ext3_acl_from_disk(value, retval);
	else if (retval == -ENODATA || retval == -ENOSYS)
		acl = NULL;
	else
		acl = ERR_PTR(retval);
	kfree(value);

	if (!IS_ERR(acl)) {
		switch(type) {
			case ACL_TYPE_ACCESS:
				ext3_iset_acl(inode, &ei->i_acl, acl);
				break;

			case ACL_TYPE_DEFAULT:
				ext3_iset_acl(inode, &ei->i_default_acl, acl);
				break;
		}
	}
	return acl;
}

Пример #2

Файл: acl.c Проект: jameshilliard/actiontec_opensrc_mi424wr-rev-e-f_fw-20-10-7-5

/*
 * Inode operation get_posix_acl().
 *
 * inode->i_sem: don't care
 * BKL: held
 */
struct posix_acl *
ext3_get_acl(struct inode *inode, int type)
{
	const size_t max_size = ext3_acl_size(EXT3_ACL_MAX_ENTRIES);
	struct ext3_inode_info *ei = EXT3_I(inode);
	int name_index;
	char *value;
	struct posix_acl *acl;
	int retval;

	if (!IS_POSIXACL(inode))
		return 0;

	switch(type) {
		case ACL_TYPE_ACCESS:
			if (ei->i_acl != EXT3_ACL_NOT_CACHED)
				return posix_acl_dup(ei->i_acl);
			name_index = EXT3_XATTR_INDEX_POSIX_ACL_ACCESS;
			break;

		case ACL_TYPE_DEFAULT:
			if (ei->i_default_acl != EXT3_ACL_NOT_CACHED)
				return posix_acl_dup(ei->i_default_acl);
			name_index = EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT;
			break;

		default:
			return ERR_PTR(-EINVAL);
	}
	value = kmalloc(max_size, GFP_KERNEL);
	if (!value)
		return ERR_PTR(-ENOMEM);

	retval = ext3_xattr_get(inode, name_index, "", value, max_size);
	acl = ERR_PTR(retval);
	if (retval > 0)
		acl = ext3_acl_from_disk(value, retval);
	else if (retval == -ENODATA || retval == -ENOSYS)
		acl = NULL;
	kfree(value);

	if (!IS_ERR(acl)) {
		switch(type) {
			case ACL_TYPE_ACCESS:
				ei->i_acl = posix_acl_dup(acl);
				break;

			case ACL_TYPE_DEFAULT:
				ei->i_default_acl = posix_acl_dup(acl);
				break;
		}
	}
	return acl;
}

Пример #3

/*
 * Inode operation get_posix_acl().
 *
 * inode->i_mutex: don't care
 */
static struct posix_acl *
ext3_get_acl(struct inode *inode, int type)
{
	int name_index;
	char *value = NULL;
	struct posix_acl *acl;
	int retval;

	if (!test_opt(inode->i_sb, POSIX_ACL))
		return NULL;

	acl = get_cached_acl(inode, type);
	if (acl != ACL_NOT_CACHED)
		return acl;

	switch (type) {
	case ACL_TYPE_ACCESS:
		name_index = EXT3_XATTR_INDEX_POSIX_ACL_ACCESS;
		break;
	case ACL_TYPE_DEFAULT:
		name_index = EXT3_XATTR_INDEX_POSIX_ACL_DEFAULT;
		break;
	default:
		BUG();
	}

	retval = ext3_xattr_get(inode, name_index, "", NULL, 0);
	if (retval > 0) {
		value = kmalloc(retval, GFP_NOFS);
		if (!value)
			return ERR_PTR(-ENOMEM);
		retval = ext3_xattr_get(inode, name_index, "", value, retval);
	}
	if (retval > 0)
		acl = ext3_acl_from_disk(value, retval);
	else if (retval == -ENODATA || retval == -ENOSYS)
		acl = NULL;
	else
		acl = ERR_PTR(retval);
	kfree(value);

	if (!IS_ERR(acl))
		set_cached_acl(inode, type, acl);

	return acl;
}