user_config.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
  4 */
  5
  6#include <linux/slab.h>
  7#include <linux/mm.h>
  8
  9#include "user_config.h"
 10#include "../transport_ipc.h"
 11
 12struct ksmbd_user *ksmbd_login_user(const char *account)
 13{
 14	struct ksmbd_login_response *resp;
 15	struct ksmbd_login_response_ext *resp_ext = NULL;
 16	struct ksmbd_user *user = NULL;
 17
 18	resp = ksmbd_ipc_login_request(account);
 19	if (!resp)
 20		return NULL;
 21
 22	if (!(resp->status & KSMBD_USER_FLAG_OK))
 23		goto out;
 24
 25	if (resp->status & KSMBD_USER_FLAG_EXTENSION)
 26		resp_ext = ksmbd_ipc_login_request_ext(account);
 27
 28	user = ksmbd_alloc_user(resp, resp_ext);
 29out:
 30	kvfree(resp);
 31	return user;
 32}
 33
 34struct ksmbd_user *ksmbd_alloc_user(struct ksmbd_login_response *resp,
 35		struct ksmbd_login_response_ext *resp_ext)
 36{
 37	struct ksmbd_user *user;
 38
 39	user = kmalloc(sizeof(struct ksmbd_user), KSMBD_DEFAULT_GFP);
 40	if (!user)
 41		return NULL;
 42
 43	user->name = kstrdup(resp->account, KSMBD_DEFAULT_GFP);
 44	user->flags = resp->status;
 45	user->gid = resp->gid;
 46	user->uid = resp->uid;
 47	user->passkey_sz = resp->hash_sz;
 48	user->passkey = kmalloc(resp->hash_sz, KSMBD_DEFAULT_GFP);
 49	if (user->passkey)
 50		memcpy(user->passkey, resp->hash, resp->hash_sz);
 51
 52	user->ngroups = 0;
 53	user->sgid = NULL;
 54
 55	if (!user->name || !user->passkey)
 56		goto err_free;
 57
 58	if (resp_ext) {
 59		if (resp_ext->ngroups > NGROUPS_MAX) {
 60			pr_err("ngroups(%u) from login response exceeds max groups(%d)\n",
 61					resp_ext->ngroups, NGROUPS_MAX);
 62			goto err_free;
 63		}
 64
 65		user->sgid = kmemdup(resp_ext->____payload,
 66				     resp_ext->ngroups * sizeof(gid_t),
 67				     KSMBD_DEFAULT_GFP);
 68		if (!user->sgid)
 69			goto err_free;
 70
 71		user->ngroups = resp_ext->ngroups;
 72		ksmbd_debug(SMB, "supplementary groups : %d\n", user->ngroups);
 73	}
 74
 75	return user;
 76
 77err_free:
 78	kfree(user->name);
 79	kfree(user->passkey);
 80	kfree(user);
 81	return NULL;
 82}
 83
 84void ksmbd_free_user(struct ksmbd_user *user)
 85{
 86	ksmbd_ipc_logout_request(user->name, user->flags);
 87	kfree(user->sgid);
 88	kfree(user->name);
 89	kfree(user->passkey);
 90	kfree(user);
 91}
 92
 93int ksmbd_anonymous_user(struct ksmbd_user *user)
 94{
 95	if (user->name[0] == '\0')
 96		return 1;
 97	return 0;
 98}
 99
100bool ksmbd_compare_user(struct ksmbd_user *u1, struct ksmbd_user *u2)
101{
102	if (strcmp(u1->name, u2->name))
103		return false;
104	if (memcmp(u1->passkey, u2->passkey, u1->passkey_sz))
105		return false;
106
107	return true;
108}