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
  10 #include "auth.h"
  11 #include "connection.h"
  12 #include "smb_common.h"
  13 #include "server.h"
  14
  15 static struct smb_version_values smb21_server_values = {
  16         .version_string = SMB21_VERSION_STRING,
  17         .protocol_id = SMB21_PROT_ID,
  18         .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
  19         .max_read_size = SMB21_DEFAULT_IOSIZE,
  20         .max_write_size = SMB21_DEFAULT_IOSIZE,
  21         .max_trans_size = SMB21_DEFAULT_IOSIZE,
  22         .large_lock_type = 0,
  23         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
  24         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
  25         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
  26         .header_size = sizeof(struct smb2_hdr),
  27         .max_header_size = MAX_SMB2_HDR_SIZE,
  28         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
  29         .lock_cmd = SMB2_LOCK,
  30         .cap_unix = 0,
  31         .cap_nt_find = SMB2_NT_FIND,
  32         .cap_large_files = SMB2_LARGE_FILES,
  33         .create_lease_size = sizeof(struct create_lease),
  34         .create_durable_size = sizeof(struct create_durable_rsp),
  35         .create_mxac_size = sizeof(struct create_mxac_rsp),
  36         .create_disk_id_size = sizeof(struct create_disk_id_rsp),
  37         .create_posix_size = sizeof(struct create_posix_rsp),
  38 };
  39
  40 static struct smb_version_values smb30_server_values = {
  41         .version_string = SMB30_VERSION_STRING,
  42         .protocol_id = SMB30_PROT_ID,
  43         .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
  44         .max_read_size = SMB3_DEFAULT_IOSIZE,
  45         .max_write_size = SMB3_DEFAULT_IOSIZE,
  46         .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
  47         .large_lock_type = 0,
  48         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
  49         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
  50         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
  51         .header_size = sizeof(struct smb2_hdr),
  52         .max_header_size = MAX_SMB2_HDR_SIZE,
  53         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
  54         .lock_cmd = SMB2_LOCK,
  55         .cap_unix = 0,
  56         .cap_nt_find = SMB2_NT_FIND,
  57         .cap_large_files = SMB2_LARGE_FILES,
  58         .create_lease_size = sizeof(struct create_lease_v2),
  59         .create_durable_size = sizeof(struct create_durable_rsp),
  60         .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
  61         .create_mxac_size = sizeof(struct create_mxac_rsp),
  62         .create_disk_id_size = sizeof(struct create_disk_id_rsp),
  63         .create_posix_size = sizeof(struct create_posix_rsp),
  64 };
  65
  66 static struct smb_version_values smb302_server_values = {
  67         .version_string = SMB302_VERSION_STRING,
  68         .protocol_id = SMB302_PROT_ID,
  69         .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
  70         .max_read_size = SMB3_DEFAULT_IOSIZE,
  71         .max_write_size = SMB3_DEFAULT_IOSIZE,
  72         .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
  73         .large_lock_type = 0,
  74         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
  75         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
  76         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
  77         .header_size = sizeof(struct smb2_hdr),
  78         .max_header_size = MAX_SMB2_HDR_SIZE,
  79         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
  80         .lock_cmd = SMB2_LOCK,
  81         .cap_unix = 0,
  82         .cap_nt_find = SMB2_NT_FIND,
  83         .cap_large_files = SMB2_LARGE_FILES,
  84         .create_lease_size = sizeof(struct create_lease_v2),
  85         .create_durable_size = sizeof(struct create_durable_rsp),
  86         .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
  87         .create_mxac_size = sizeof(struct create_mxac_rsp),
  88         .create_disk_id_size = sizeof(struct create_disk_id_rsp),
  89         .create_posix_size = sizeof(struct create_posix_rsp),
  90 };
  91
  92 static struct smb_version_values smb311_server_values = {
  93         .version_string = SMB311_VERSION_STRING,
  94         .protocol_id = SMB311_PROT_ID,
  95         .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
  96         .max_read_size = SMB3_DEFAULT_IOSIZE,
  97         .max_write_size = SMB3_DEFAULT_IOSIZE,
  98         .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
  99         .large_lock_type = 0,
 100         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
 101         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
 102         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 103         .header_size = sizeof(struct smb2_hdr),
 104         .max_header_size = MAX_SMB2_HDR_SIZE,
 105         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
 106         .lock_cmd = SMB2_LOCK,
 107         .cap_unix = 0,
 108         .cap_nt_find = SMB2_NT_FIND,
 109         .cap_large_files = SMB2_LARGE_FILES,
 110         .create_lease_size = sizeof(struct create_lease_v2),
 111         .create_durable_size = sizeof(struct create_durable_rsp),
 112         .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
 113         .create_mxac_size = sizeof(struct create_mxac_rsp),
 114         .create_disk_id_size = sizeof(struct create_disk_id_rsp),
 115         .create_posix_size = sizeof(struct create_posix_rsp),
 116 };
 117
 118 static struct smb_version_ops smb2_0_server_ops = {
 119         .get_cmd_val            =       get_smb2_cmd_val,
 120         .init_rsp_hdr           =       init_smb2_rsp_hdr,
 121         .set_rsp_status         =       set_smb2_rsp_status,
 122         .allocate_rsp_buf       =       smb2_allocate_rsp_buf,
 123         .set_rsp_credits        =       smb2_set_rsp_credits,
 124         .check_user_session     =       smb2_check_user_session,
 125         .get_ksmbd_tcon         =       smb2_get_ksmbd_tcon,
 126         .is_sign_req            =       smb2_is_sign_req,
 127         .check_sign_req         =       smb2_check_sign_req,
 128         .set_sign_rsp           =       smb2_set_sign_rsp
 129 };
 130
 131 static struct smb_version_ops smb3_0_server_ops = {
 132         .get_cmd_val            =       get_smb2_cmd_val,
 133         .init_rsp_hdr           =       init_smb2_rsp_hdr,
 134         .set_rsp_status         =       set_smb2_rsp_status,
 135         .allocate_rsp_buf       =       smb2_allocate_rsp_buf,
 136         .set_rsp_credits        =       smb2_set_rsp_credits,
 137         .check_user_session     =       smb2_check_user_session,
 138         .get_ksmbd_tcon         =       smb2_get_ksmbd_tcon,
 139         .is_sign_req            =       smb2_is_sign_req,
 140         .check_sign_req         =       smb3_check_sign_req,
 141         .set_sign_rsp           =       smb3_set_sign_rsp,
 142         .generate_signingkey    =       ksmbd_gen_smb30_signingkey,
 143         .generate_encryptionkey =       ksmbd_gen_smb30_encryptionkey,
 144         .is_transform_hdr       =       smb3_is_transform_hdr,
 145         .decrypt_req            =       smb3_decrypt_req,
 146         .encrypt_resp           =       smb3_encrypt_resp
 147 };
 148
 149 static struct smb_version_ops smb3_11_server_ops = {
 150         .get_cmd_val            =       get_smb2_cmd_val,
 151         .init_rsp_hdr           =       init_smb2_rsp_hdr,
 152         .set_rsp_status         =       set_smb2_rsp_status,
 153         .allocate_rsp_buf       =       smb2_allocate_rsp_buf,
 154         .set_rsp_credits        =       smb2_set_rsp_credits,
 155         .check_user_session     =       smb2_check_user_session,
 156         .get_ksmbd_tcon         =       smb2_get_ksmbd_tcon,
 157         .is_sign_req            =       smb2_is_sign_req,
 158         .check_sign_req         =       smb3_check_sign_req,
 159         .set_sign_rsp           =       smb3_set_sign_rsp,
 160         .generate_signingkey    =       ksmbd_gen_smb311_signingkey,
 161         .generate_encryptionkey =       ksmbd_gen_smb311_encryptionkey,
 162         .is_transform_hdr       =       smb3_is_transform_hdr,
 163         .decrypt_req            =       smb3_decrypt_req,
 164         .encrypt_resp           =       smb3_encrypt_resp
 165 };
 166
 167 static struct smb_version_cmds smb2_0_server_cmds[NUMBER_OF_SMB2_COMMANDS] = {
 168         [SMB2_NEGOTIATE_HE]     =       { .proc = smb2_negotiate_request, },
 169         [SMB2_SESSION_SETUP_HE] =       { .proc = smb2_sess_setup, },
 170         [SMB2_TREE_CONNECT_HE]  =       { .proc = smb2_tree_connect,},
 171         [SMB2_TREE_DISCONNECT_HE]  =    { .proc = smb2_tree_disconnect,},
 172         [SMB2_LOGOFF_HE]        =       { .proc = smb2_session_logoff,},
 173         [SMB2_CREATE_HE]        =       { .proc = smb2_open},
 174         [SMB2_QUERY_INFO_HE]    =       { .proc = smb2_query_info},
 175         [SMB2_QUERY_DIRECTORY_HE] =     { .proc = smb2_query_dir},
 176         [SMB2_CLOSE_HE]         =       { .proc = smb2_close},
 177         [SMB2_ECHO_HE]          =       { .proc = smb2_echo},
 178         [SMB2_SET_INFO_HE]      =       { .proc = smb2_set_info},
 179         [SMB2_READ_HE]          =       { .proc = smb2_read},
 180         [SMB2_WRITE_HE]         =       { .proc = smb2_write},
 181         [SMB2_FLUSH_HE]         =       { .proc = smb2_flush},
 182         [SMB2_CANCEL_HE]        =       { .proc = smb2_cancel},
 183         [SMB2_LOCK_HE]          =       { .proc = smb2_lock},
 184         [SMB2_IOCTL_HE]         =       { .proc = smb2_ioctl},
 185         [SMB2_OPLOCK_BREAK_HE]  =       { .proc = smb2_oplock_break},
 186         [SMB2_CHANGE_NOTIFY_HE] =       { .proc = smb2_notify},
 187 };
 188
 189 /**
 190  * init_smb2_1_server() - initialize a smb server connection with smb2.1
 191  *                      command dispatcher
 192  * @conn:       connection instance
 193  */
 194 void init_smb2_1_server(struct ksmbd_conn *conn)
 195 {
 196         conn->vals = &smb21_server_values;
 197         conn->ops = &smb2_0_server_ops;
 198         conn->cmds = smb2_0_server_cmds;
 199         conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 200         conn->max_credits = SMB2_MAX_CREDITS;
 201         conn->signing_algorithm = SIGNING_ALG_HMAC_SHA256_LE;
 202
 203         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
 204                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
 205 }
 206
 207 /**
 208  * init_smb3_0_server() - initialize a smb server connection with smb3.0
 209  *                      command dispatcher
 210  * @conn:       connection instance
 211  */
 212 void init_smb3_0_server(struct ksmbd_conn *conn)
 213 {
 214         conn->vals = &smb30_server_values;
 215         conn->ops = &smb3_0_server_ops;
 216         conn->cmds = smb2_0_server_cmds;
 217         conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 218         conn->max_credits = SMB2_MAX_CREDITS;
 219         conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE;
 220
 221         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
 222                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
 223
 224         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION &&
 225             conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION)
 226                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
 227
 228         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL)
 229                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL;
 230 }
 231
 232 /**
 233  * init_smb3_02_server() - initialize a smb server connection with smb3.02
 234  *                      command dispatcher
 235  * @conn:       connection instance
 236  */
 237 void init_smb3_02_server(struct ksmbd_conn *conn)
 238 {
 239         conn->vals = &smb302_server_values;
 240         conn->ops = &smb3_0_server_ops;
 241         conn->cmds = smb2_0_server_cmds;
 242         conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 243         conn->max_credits = SMB2_MAX_CREDITS;
 244         conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE;
 245
 246         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
 247                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
 248
 249         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION &&
 250             conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION)
 251                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;
 252
 253         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL)
 254                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL;
 255 }
 256
 257 /**
 258  * init_smb3_11_server() - initialize a smb server connection with smb3.11
 259  *                      command dispatcher
 260  * @conn:       connection instance
 261  */
 262 int init_smb3_11_server(struct ksmbd_conn *conn)
 263 {
 264         conn->vals = &smb311_server_values;
 265         conn->ops = &smb3_11_server_ops;
 266         conn->cmds = smb2_0_server_cmds;
 267         conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 268         conn->max_credits = SMB2_MAX_CREDITS;
 269         conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE;
 270
 271         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
 272                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
 273
 274         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL)
 275                 conn->vals->capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL;
 276
 277         INIT_LIST_HEAD(&conn->preauth_sess_table);
 278         return 0;
 279 }
 280
 281 void init_smb2_max_read_size(unsigned int sz)
 282 {
 283         sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE);
 284         smb21_server_values.max_read_size = sz;
 285         smb30_server_values.max_read_size = sz;
 286         smb302_server_values.max_read_size = sz;
 287         smb311_server_values.max_read_size = sz;
 288 }
 289
 290 void init_smb2_max_write_size(unsigned int sz)
 291 {
 292         sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE);
 293         smb21_server_values.max_write_size = sz;
 294         smb30_server_values.max_write_size = sz;
 295         smb302_server_values.max_write_size = sz;
 296         smb311_server_values.max_write_size = sz;
 297 }
 298
 299 void init_smb2_max_trans_size(unsigned int sz)
 300 {
 301         sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE);
 302         smb21_server_values.max_trans_size = sz;
 303         smb30_server_values.max_trans_size = sz;
 304         smb302_server_values.max_trans_size = sz;
 305         smb311_server_values.max_trans_size = sz;
 306 }