fs/ksmbd/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
  16 static struct smb_version_values smb21_server_values = {
  17         .version_string = SMB21_VERSION_STRING,
  18         .protocol_id = SMB21_PROT_ID,
  19         .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
  20         .max_read_size = SMB21_DEFAULT_IOSIZE,
  21         .max_write_size = SMB21_DEFAULT_IOSIZE,
  22         .max_trans_size = SMB21_DEFAULT_IOSIZE,
  23         .large_lock_type = 0,
  24         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
  25         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
  26         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
  27         .header_size = sizeof(struct smb2_hdr),
  28         .max_header_size = MAX_SMB2_HDR_SIZE,
  29         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
  30         .lock_cmd = SMB2_LOCK,
  31         .cap_unix = 0,
  32         .cap_nt_find = SMB2_NT_FIND,
  33         .cap_large_files = SMB2_LARGE_FILES,
  34         .create_lease_size = sizeof(struct create_lease),
  35         .create_durable_size = sizeof(struct create_durable_rsp),
  36         .create_mxac_size = sizeof(struct create_mxac_rsp),
  37         .create_disk_id_size = sizeof(struct create_disk_id_rsp),
  38         .create_posix_size = sizeof(struct create_posix_rsp),
  39 };
  40
  41 static struct smb_version_values smb30_server_values = {
  42         .version_string = SMB30_VERSION_STRING,
  43         .protocol_id = SMB30_PROT_ID,
  44         .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
  45         .max_read_size = SMB3_DEFAULT_IOSIZE,
  46         .max_write_size = SMB3_DEFAULT_IOSIZE,
  47         .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
  48         .large_lock_type = 0,
  49         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
  50         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
  51         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
  52         .header_size = sizeof(struct smb2_hdr),
  53         .max_header_size = MAX_SMB2_HDR_SIZE,
  54         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
  55         .lock_cmd = SMB2_LOCK,
  56         .cap_unix = 0,
  57         .cap_nt_find = SMB2_NT_FIND,
  58         .cap_large_files = SMB2_LARGE_FILES,
  59         .create_lease_size = sizeof(struct create_lease_v2),
  60         .create_durable_size = sizeof(struct create_durable_rsp),
  61         .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
  62         .create_mxac_size = sizeof(struct create_mxac_rsp),
  63         .create_disk_id_size = sizeof(struct create_disk_id_rsp),
  64         .create_posix_size = sizeof(struct create_posix_rsp),
  65 };
  66
  67 static struct smb_version_values smb302_server_values = {
  68         .version_string = SMB302_VERSION_STRING,
  69         .protocol_id = SMB302_PROT_ID,
  70         .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
  71         .max_read_size = SMB3_DEFAULT_IOSIZE,
  72         .max_write_size = SMB3_DEFAULT_IOSIZE,
  73         .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
  74         .large_lock_type = 0,
  75         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
  76         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
  77         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
  78         .header_size = sizeof(struct smb2_hdr),
  79         .max_header_size = MAX_SMB2_HDR_SIZE,
  80         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
  81         .lock_cmd = SMB2_LOCK,
  82         .cap_unix = 0,
  83         .cap_nt_find = SMB2_NT_FIND,
  84         .cap_large_files = SMB2_LARGE_FILES,
  85         .create_lease_size = sizeof(struct create_lease_v2),
  86         .create_durable_size = sizeof(struct create_durable_rsp),
  87         .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
  88         .create_mxac_size = sizeof(struct create_mxac_rsp),
  89         .create_disk_id_size = sizeof(struct create_disk_id_rsp),
  90         .create_posix_size = sizeof(struct create_posix_rsp),
  91 };
  92
  93 static struct smb_version_values smb311_server_values = {
  94         .version_string = SMB311_VERSION_STRING,
  95         .protocol_id = SMB311_PROT_ID,
  96         .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
  97         .max_read_size = SMB3_DEFAULT_IOSIZE,
  98         .max_write_size = SMB3_DEFAULT_IOSIZE,
  99         .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
 100         .large_lock_type = 0,
 101         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
 102         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
 103         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 104         .header_size = sizeof(struct smb2_hdr),
 105         .max_header_size = MAX_SMB2_HDR_SIZE,
 106         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
 107         .lock_cmd = SMB2_LOCK,
 108         .cap_unix = 0,
 109         .cap_nt_find = SMB2_NT_FIND,
 110         .cap_large_files = SMB2_LARGE_FILES,
 111         .create_lease_size = sizeof(struct create_lease_v2),
 112         .create_durable_size = sizeof(struct create_durable_rsp),
 113         .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
 114         .create_mxac_size = sizeof(struct create_mxac_rsp),
 115         .create_disk_id_size = sizeof(struct create_disk_id_rsp),
 116         .create_posix_size = sizeof(struct create_posix_rsp),
 117 };
 118
 119 static struct smb_version_ops smb2_0_server_ops = {
 120         .get_cmd_val            =       get_smb2_cmd_val,
 121         .init_rsp_hdr           =       init_smb2_rsp_hdr,
 122         .set_rsp_status         =       set_smb2_rsp_status,
 123         .allocate_rsp_buf       =       smb2_allocate_rsp_buf,
 124         .set_rsp_credits        =       smb2_set_rsp_credits,
 125         .check_user_session     =       smb2_check_user_session,
 126         .get_ksmbd_tcon         =       smb2_get_ksmbd_tcon,
 127         .is_sign_req            =       smb2_is_sign_req,
 128         .check_sign_req         =       smb2_check_sign_req,
 129         .set_sign_rsp           =       smb2_set_sign_rsp
 130 };
 131
 132 static struct smb_version_ops smb3_0_server_ops = {
 133         .get_cmd_val            =       get_smb2_cmd_val,
 134         .init_rsp_hdr           =       init_smb2_rsp_hdr,
 135         .set_rsp_status         =       set_smb2_rsp_status,
 136         .allocate_rsp_buf       =       smb2_allocate_rsp_buf,
 137         .set_rsp_credits        =       smb2_set_rsp_credits,
 138         .check_user_session     =       smb2_check_user_session,
 139         .get_ksmbd_tcon         =       smb2_get_ksmbd_tcon,
 140         .is_sign_req            =       smb2_is_sign_req,
 141         .check_sign_req         =       smb3_check_sign_req,
 142         .set_sign_rsp           =       smb3_set_sign_rsp,
 143         .generate_signingkey    =       ksmbd_gen_smb30_signingkey,
 144         .generate_encryptionkey =       ksmbd_gen_smb30_encryptionkey,
 145         .is_transform_hdr       =       smb3_is_transform_hdr,
 146         .decrypt_req            =       smb3_decrypt_req,
 147         .encrypt_resp           =       smb3_encrypt_resp
 148 };
 149
 150 static struct smb_version_ops smb3_11_server_ops = {
 151         .get_cmd_val            =       get_smb2_cmd_val,
 152         .init_rsp_hdr           =       init_smb2_rsp_hdr,
 153         .set_rsp_status         =       set_smb2_rsp_status,
 154         .allocate_rsp_buf       =       smb2_allocate_rsp_buf,
 155         .set_rsp_credits        =       smb2_set_rsp_credits,
 156         .check_user_session     =       smb2_check_user_session,
 157         .get_ksmbd_tcon         =       smb2_get_ksmbd_tcon,
 158         .is_sign_req            =       smb2_is_sign_req,
 159         .check_sign_req         =       smb3_check_sign_req,
 160         .set_sign_rsp           =       smb3_set_sign_rsp,
 161         .generate_signingkey    =       ksmbd_gen_smb311_signingkey,
 162         .generate_encryptionkey =       ksmbd_gen_smb311_encryptionkey,
 163         .is_transform_hdr       =       smb3_is_transform_hdr,
 164         .decrypt_req            =       smb3_decrypt_req,
 165         .encrypt_resp           =       smb3_encrypt_resp
 166 };
 167
 168 static struct smb_version_cmds smb2_0_server_cmds[NUMBER_OF_SMB2_COMMANDS] = {
 169         [SMB2_NEGOTIATE_HE]     =       { .proc = smb2_negotiate_request, },
 170         [SMB2_SESSION_SETUP_HE] =       { .proc = smb2_sess_setup, },
 171         [SMB2_TREE_CONNECT_HE]  =       { .proc = smb2_tree_connect,},
 172         [SMB2_TREE_DISCONNECT_HE]  =    { .proc = smb2_tree_disconnect,},
 173         [SMB2_LOGOFF_HE]        =       { .proc = smb2_session_logoff,},
 174         [SMB2_CREATE_HE]        =       { .proc = smb2_open},
 175         [SMB2_QUERY_INFO_HE]    =       { .proc = smb2_query_info},
 176         [SMB2_QUERY_DIRECTORY_HE] =     { .proc = smb2_query_dir},
 177         [SMB2_CLOSE_HE]         =       { .proc = smb2_close},
 178         [SMB2_ECHO_HE]          =       { .proc = smb2_echo},
 179         [SMB2_SET_INFO_HE]      =       { .proc = smb2_set_info},
 180         [SMB2_READ_HE]          =       { .proc = smb2_read},
 181         [SMB2_WRITE_HE]         =       { .proc = smb2_write},
 182         [SMB2_FLUSH_HE]         =       { .proc = smb2_flush},
 183         [SMB2_CANCEL_HE]        =       { .proc = smb2_cancel},
 184         [SMB2_LOCK_HE]          =       { .proc = smb2_lock},
 185         [SMB2_IOCTL_HE]         =       { .proc = smb2_ioctl},
 186         [SMB2_OPLOCK_BREAK_HE]  =       { .proc = smb2_oplock_break},
 187         [SMB2_CHANGE_NOTIFY_HE] =       { .proc = smb2_notify},
 188 };
 189
 190 /**
 191  * init_smb2_1_server() - initialize a smb server connection with smb2.1
 192  *                      command dispatcher
 193  * @conn:       connection instance
 194  */
 195 void init_smb2_1_server(struct ksmbd_conn *conn)
 196 {
 197         conn->vals = &smb21_server_values;
 198         conn->ops = &smb2_0_server_ops;
 199         conn->cmds = smb2_0_server_cmds;
 200         conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 201         conn->max_credits = SMB2_MAX_CREDITS;
 202         conn->signing_algorithm = SIGNING_ALG_HMAC_SHA256;
 203
 204         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
 205                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
 206 }
 207
 208 /**
 209  * init_smb3_0_server() - initialize a smb server connection with smb3.0
 210  *                      command dispatcher
 211  * @conn:       connection instance
 212  */
 213 void init_smb3_0_server(struct ksmbd_conn *conn)
 214 {
 215         conn->vals = &smb30_server_values;
 216         conn->ops = &smb3_0_server_ops;
 217         conn->cmds = smb2_0_server_cmds;
 218         conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 219         conn->max_credits = SMB2_MAX_CREDITS;
 220         conn->signing_algorithm = SIGNING_ALG_AES_CMAC;
 221
 222         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
 223                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
 224
 225         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION &&
 226             conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION)
 227                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
 228
 229         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL)
 230                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL;
 231 }
 232
 233 /**
 234  * init_smb3_02_server() - initialize a smb server connection with smb3.02
 235  *                      command dispatcher
 236  * @conn:       connection instance
 237  */
 238 void init_smb3_02_server(struct ksmbd_conn *conn)
 239 {
 240         conn->vals = &smb302_server_values;
 241         conn->ops = &smb3_0_server_ops;
 242         conn->cmds = smb2_0_server_cmds;
 243         conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 244         conn->max_credits = SMB2_MAX_CREDITS;
 245         conn->signing_algorithm = SIGNING_ALG_AES_CMAC;
 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         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL)
 255                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL;
 256 }
 257
 258 /**
 259  * init_smb3_11_server() - initialize a smb server connection with smb3.11
 260  *                      command dispatcher
 261  * @conn:       connection instance
 262  */
 263 int init_smb3_11_server(struct ksmbd_conn *conn)
 264 {
 265         conn->vals = &smb311_server_values;
 266         conn->ops = &smb3_11_server_ops;
 267         conn->cmds = smb2_0_server_cmds;
 268         conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 269         conn->max_credits = SMB2_MAX_CREDITS;
 270         conn->signing_algorithm = SIGNING_ALG_AES_CMAC;
 271
 272         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
 273                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
 274
 275         if (conn->cipher_type)
 276                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
 277
 278         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL)
 279                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL;
 280
 281         INIT_LIST_HEAD(&conn->preauth_sess_table);
 282         return 0;
 283 }
 284
 285 void init_smb2_max_read_size(unsigned int sz)
 286 {
 287         smb21_server_values.max_read_size = sz;
 288         smb30_server_values.max_read_size = sz;
 289         smb302_server_values.max_read_size = sz;
 290         smb311_server_values.max_read_size = sz;
 291 }
 292
 293 void init_smb2_max_write_size(unsigned int sz)
 294 {
 295         smb21_server_values.max_write_size = sz;
 296         smb30_server_values.max_write_size = sz;
 297         smb302_server_values.max_write_size = sz;
 298         smb311_server_values.max_write_size = sz;
 299 }
 300
 301 void init_smb2_max_trans_size(unsigned int sz)
 302 {
 303         smb21_server_values.max_trans_size = sz;
 304         smb30_server_values.max_trans_size = sz;
 305         smb302_server_values.max_trans_size = sz;
 306         smb311_server_values.max_trans_size = sz;
 307 }