fs/cifsd/smb2ops.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
   4  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
   5  */
   6
   7 #include <linux/slab.h>
   8 #include "glob.h"
   9 #include "smb2pdu.h"
  10
  11 #include "auth.h"
  12 #include "connection.h"
  13 #include "smb_common.h"
  14 #include "server.h"
  15 #include "ksmbd_server.h"
  16
  17 static struct smb_version_values smb21_server_values = {
  18         .version_string = SMB21_VERSION_STRING,
  19         .protocol_id = SMB21_PROT_ID,
  20         .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
  21         .max_read_size = SMB21_DEFAULT_IOSIZE,
  22         .max_write_size = SMB21_DEFAULT_IOSIZE,
  23         .max_trans_size = SMB21_DEFAULT_IOSIZE,
  24         .large_lock_type = 0,
  25         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
  26         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
  27         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
  28         .header_size = sizeof(struct smb2_hdr),
  29         .max_header_size = MAX_SMB2_HDR_SIZE,
  30         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
  31         .lock_cmd = SMB2_LOCK,
  32         .cap_unix = 0,
  33         .cap_nt_find = SMB2_NT_FIND,
  34         .cap_large_files = SMB2_LARGE_FILES,
  35         .create_lease_size = sizeof(struct create_lease),
  36         .create_durable_size = sizeof(struct create_durable_rsp),
  37         .create_mxac_size = sizeof(struct create_mxac_rsp),
  38         .create_disk_id_size = sizeof(struct create_disk_id_rsp),
  39         .create_posix_size = sizeof(struct create_posix_rsp),
  40 };
  41
  42 static struct smb_version_values smb30_server_values = {
  43         .version_string = SMB30_VERSION_STRING,
  44         .protocol_id = SMB30_PROT_ID,
  45         .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
  46         .max_read_size = SMB3_DEFAULT_IOSIZE,
  47         .max_write_size = SMB3_DEFAULT_IOSIZE,
  48         .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
  49         .large_lock_type = 0,
  50         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
  51         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
  52         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
  53         .header_size = sizeof(struct smb2_hdr),
  54         .max_header_size = MAX_SMB2_HDR_SIZE,
  55         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
  56         .lock_cmd = SMB2_LOCK,
  57         .cap_unix = 0,
  58         .cap_nt_find = SMB2_NT_FIND,
  59         .cap_large_files = SMB2_LARGE_FILES,
  60         .create_lease_size = sizeof(struct create_lease_v2),
  61         .create_durable_size = sizeof(struct create_durable_rsp),
  62         .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
  63         .create_mxac_size = sizeof(struct create_mxac_rsp),
  64         .create_disk_id_size = sizeof(struct create_disk_id_rsp),
  65         .create_posix_size = sizeof(struct create_posix_rsp),
  66 };
  67
  68 static struct smb_version_values smb302_server_values = {
  69         .version_string = SMB302_VERSION_STRING,
  70         .protocol_id = SMB302_PROT_ID,
  71         .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
  72         .max_read_size = SMB3_DEFAULT_IOSIZE,
  73         .max_write_size = SMB3_DEFAULT_IOSIZE,
  74         .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
  75         .large_lock_type = 0,
  76         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
  77         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
  78         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
  79         .header_size = sizeof(struct smb2_hdr),
  80         .max_header_size = MAX_SMB2_HDR_SIZE,
  81         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
  82         .lock_cmd = SMB2_LOCK,
  83         .cap_unix = 0,
  84         .cap_nt_find = SMB2_NT_FIND,
  85         .cap_large_files = SMB2_LARGE_FILES,
  86         .create_lease_size = sizeof(struct create_lease_v2),
  87         .create_durable_size = sizeof(struct create_durable_rsp),
  88         .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
  89         .create_mxac_size = sizeof(struct create_mxac_rsp),
  90         .create_disk_id_size = sizeof(struct create_disk_id_rsp),
  91         .create_posix_size = sizeof(struct create_posix_rsp),
  92 };
  93
  94 static struct smb_version_values smb311_server_values = {
  95         .version_string = SMB311_VERSION_STRING,
  96         .protocol_id = SMB311_PROT_ID,
  97         .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
  98         .max_read_size = SMB3_DEFAULT_IOSIZE,
  99         .max_write_size = SMB3_DEFAULT_IOSIZE,
 100         .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
 101         .large_lock_type = 0,
 102         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
 103         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
 104         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 105         .header_size = sizeof(struct smb2_hdr),
 106         .max_header_size = MAX_SMB2_HDR_SIZE,
 107         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
 108         .lock_cmd = SMB2_LOCK,
 109         .cap_unix = 0,
 110         .cap_nt_find = SMB2_NT_FIND,
 111         .cap_large_files = SMB2_LARGE_FILES,
 112         .create_lease_size = sizeof(struct create_lease_v2),
 113         .create_durable_size = sizeof(struct create_durable_rsp),
 114         .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
 115         .create_mxac_size = sizeof(struct create_mxac_rsp),
 116         .create_disk_id_size = sizeof(struct create_disk_id_rsp),
 117         .create_posix_size = sizeof(struct create_posix_rsp),
 118 };
 119
 120 static struct smb_version_ops smb2_0_server_ops = {
 121         .get_cmd_val            =       get_smb2_cmd_val,
 122         .init_rsp_hdr           =       init_smb2_rsp_hdr,
 123         .set_rsp_status         =       set_smb2_rsp_status,
 124         .allocate_rsp_buf       =       smb2_allocate_rsp_buf,
 125         .set_rsp_credits        =       smb2_set_rsp_credits,
 126         .check_user_session     =       smb2_check_user_session,
 127         .get_ksmbd_tcon         =       smb2_get_ksmbd_tcon,
 128         .is_sign_req            =       smb2_is_sign_req,
 129         .check_sign_req         =       smb2_check_sign_req,
 130         .set_sign_rsp           =       smb2_set_sign_rsp
 131 };
 132
 133 static struct smb_version_ops smb3_0_server_ops = {
 134         .get_cmd_val            =       get_smb2_cmd_val,
 135         .init_rsp_hdr           =       init_smb2_rsp_hdr,
 136         .set_rsp_status         =       set_smb2_rsp_status,
 137         .allocate_rsp_buf       =       smb2_allocate_rsp_buf,
 138         .set_rsp_credits        =       smb2_set_rsp_credits,
 139         .check_user_session     =       smb2_check_user_session,
 140         .get_ksmbd_tcon         =       smb2_get_ksmbd_tcon,
 141         .is_sign_req            =       smb2_is_sign_req,
 142         .check_sign_req         =       smb3_check_sign_req,
 143         .set_sign_rsp           =       smb3_set_sign_rsp,
 144         .generate_signingkey    =       ksmbd_gen_smb30_signingkey,
 145         .generate_encryptionkey =       ksmbd_gen_smb30_encryptionkey,
 146         .is_transform_hdr       =       smb3_is_transform_hdr,
 147         .decrypt_req            =       smb3_decrypt_req,
 148         .encrypt_resp           =       smb3_encrypt_resp
 149 };
 150
 151 static struct smb_version_ops smb3_11_server_ops = {
 152         .get_cmd_val            =       get_smb2_cmd_val,
 153         .init_rsp_hdr           =       init_smb2_rsp_hdr,
 154         .set_rsp_status         =       set_smb2_rsp_status,
 155         .allocate_rsp_buf       =       smb2_allocate_rsp_buf,
 156         .set_rsp_credits        =       smb2_set_rsp_credits,
 157         .check_user_session     =       smb2_check_user_session,
 158         .get_ksmbd_tcon         =       smb2_get_ksmbd_tcon,
 159         .is_sign_req            =       smb2_is_sign_req,
 160         .check_sign_req         =       smb3_check_sign_req,
 161         .set_sign_rsp           =       smb3_set_sign_rsp,
 162         .generate_signingkey    =       ksmbd_gen_smb311_signingkey,
 163         .generate_encryptionkey =       ksmbd_gen_smb311_encryptionkey,
 164         .is_transform_hdr       =       smb3_is_transform_hdr,
 165         .decrypt_req            =       smb3_decrypt_req,
 166         .encrypt_resp           =       smb3_encrypt_resp
 167 };
 168
 169 static struct smb_version_cmds smb2_0_server_cmds[NUMBER_OF_SMB2_COMMANDS] = {
 170         [SMB2_NEGOTIATE_HE]     =       { .proc = smb2_negotiate_request, },
 171         [SMB2_SESSION_SETUP_HE] =       { .proc = smb2_sess_setup, },
 172         [SMB2_TREE_CONNECT_HE]  =       { .proc = smb2_tree_connect,},
 173         [SMB2_TREE_DISCONNECT_HE]  =    { .proc = smb2_tree_disconnect,},
 174         [SMB2_LOGOFF_HE]        =       { .proc = smb2_session_logoff,},
 175         [SMB2_CREATE_HE]        =       { .proc = smb2_open},
 176         [SMB2_QUERY_INFO_HE]    =       { .proc = smb2_query_info},
 177         [SMB2_QUERY_DIRECTORY_HE] =     { .proc = smb2_query_dir},
 178         [SMB2_CLOSE_HE]         =       { .proc = smb2_close},
 179         [SMB2_ECHO_HE]          =       { .proc = smb2_echo},
 180         [SMB2_SET_INFO_HE]      =       { .proc = smb2_set_info},
 181         [SMB2_READ_HE]          =       { .proc = smb2_read},
 182         [SMB2_WRITE_HE]         =       { .proc = smb2_write},
 183         [SMB2_FLUSH_HE]         =       { .proc = smb2_flush},
 184         [SMB2_CANCEL_HE]        =       { .proc = smb2_cancel},
 185         [SMB2_LOCK_HE]          =       { .proc = smb2_lock},
 186         [SMB2_IOCTL_HE]         =       { .proc = smb2_ioctl},
 187         [SMB2_OPLOCK_BREAK_HE]  =       { .proc = smb2_oplock_break},
 188         [SMB2_CHANGE_NOTIFY_HE] =       { .proc = smb2_notify},
 189 };
 190
 191 int init_smb2_0_server(struct ksmbd_conn *conn)
 192 {
 193         return -EOPNOTSUPP;
 194 }
 195
 196 /**
 197  * init_smb2_1_server() - initialize a smb server connection with smb2.1
 198  *                      command dispatcher
 199  * @conn:       connection instance
 200  */
 201 void init_smb2_1_server(struct ksmbd_conn *conn)
 202 {
 203         conn->vals = &smb21_server_values;
 204         conn->ops = &smb2_0_server_ops;
 205         conn->cmds = smb2_0_server_cmds;
 206         conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 207         conn->max_credits = SMB2_MAX_CREDITS;
 208
 209         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
 210                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
 211 }
 212
 213 /**
 214  * init_smb3_0_server() - initialize a smb server connection with smb3.0
 215  *                      command dispatcher
 216  * @conn:       connection instance
 217  */
 218 void init_smb3_0_server(struct ksmbd_conn *conn)
 219 {
 220         conn->vals = &smb30_server_values;
 221         conn->ops = &smb3_0_server_ops;
 222         conn->cmds = smb2_0_server_cmds;
 223         conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 224         conn->max_credits = SMB2_MAX_CREDITS;
 225
 226         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
 227                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
 228
 229         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION &&
 230             conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION)
 231                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
 232 }
 233
 234 /**
 235  * init_smb3_02_server() - initialize a smb server connection with smb3.02
 236  *                      command dispatcher
 237  * @conn:       connection instance
 238  */
 239 void init_smb3_02_server(struct ksmbd_conn *conn)
 240 {
 241         conn->vals = &smb302_server_values;
 242         conn->ops = &smb3_0_server_ops;
 243         conn->cmds = smb2_0_server_cmds;
 244         conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 245         conn->max_credits = SMB2_MAX_CREDITS;
 246
 247         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
 248                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
 249
 250         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION &&
 251             conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION)
 252                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
 253 }
 254
 255 /**
 256  * init_smb3_11_server() - initialize a smb server connection with smb3.11
 257  *                      command dispatcher
 258  * @conn:       connection instance
 259  */
 260 int init_smb3_11_server(struct ksmbd_conn *conn)
 261 {
 262         conn->vals = &smb311_server_values;
 263         conn->ops = &smb3_11_server_ops;
 264         conn->cmds = smb2_0_server_cmds;
 265         conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 266         conn->max_credits = SMB2_MAX_CREDITS;
 267
 268         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
 269                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
 270
 271         if (conn->cipher_type)
 272                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
 273
 274         INIT_LIST_HEAD(&conn->preauth_sess_table);
 275         return 0;
 276 }
 277
 278 void init_smb2_max_read_size(unsigned int sz)
 279 {
 280         smb21_server_values.max_read_size = sz;
 281         smb30_server_values.max_read_size = sz;
 282         smb302_server_values.max_read_size = sz;
 283         smb311_server_values.max_read_size = sz;
 284 }
 285
 286 void init_smb2_max_write_size(unsigned int sz)
 287 {
 288         smb21_server_values.max_write_size = sz;
 289         smb30_server_values.max_write_size = sz;
 290         smb302_server_values.max_write_size = sz;
 291         smb311_server_values.max_write_size = sz;
 292 }
 293
 294 void init_smb2_max_trans_size(unsigned int sz)
 295 {
 296         smb21_server_values.max_trans_size = sz;
 297         smb30_server_values.max_trans_size = sz;
 298         smb302_server_values.max_trans_size = sz;
 299         smb311_server_values.max_trans_size = sz;
 300 }