Quelle  smb2ops.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
 *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
 */

#include <linux/slab.h>
#include "glob.h"

#include "auth.h"
#include "connection.h"
#include "smb_common.h"
#include "server.h"

static struct smb_version_values smb21_server_values = {
 .version_string = SMB21_VERSION_STRING,
 .protocol_id = SMB21_PROT_ID,
 .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
 .max_read_size = SMB21_DEFAULT_IOSIZE,
 .max_write_size = SMB21_DEFAULT_IOSIZE,
 .max_trans_size = SMB21_DEFAULT_IOSIZE,
 .max_credits = SMB2_MAX_CREDITS,
 .large_lock_type = 0,
 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 .header_size = sizeof(struct smb2_hdr),
 .max_header_size = MAX_SMB2_HDR_SIZE,
 .read_rsp_size = sizeof(struct smb2_read_rsp),
 .lock_cmd = SMB2_LOCK,
 .cap_unix = 0,
 .cap_nt_find = SMB2_NT_FIND,
 .cap_large_files = SMB2_LARGE_FILES,
 .create_lease_size = sizeof(struct create_lease),
 .create_durable_size = sizeof(struct create_durable_rsp),
 .create_mxac_size = sizeof(struct create_mxac_rsp),
 .create_disk_id_size = sizeof(struct create_disk_id_rsp),
 .create_posix_size = sizeof(struct create_posix_rsp),
};

static struct smb_version_values smb30_server_values = {
 .version_string = SMB30_VERSION_STRING,
 .protocol_id = SMB30_PROT_ID,
 .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
 .max_read_size = SMB3_DEFAULT_IOSIZE,
 .max_write_size = SMB3_DEFAULT_IOSIZE,
 .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
 .max_credits = SMB2_MAX_CREDITS,
 .large_lock_type = 0,
 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 .header_size = sizeof(struct smb2_hdr),
 .max_header_size = MAX_SMB2_HDR_SIZE,
 .read_rsp_size = sizeof(struct smb2_read_rsp),
 .lock_cmd = SMB2_LOCK,
 .cap_unix = 0,
 .cap_nt_find = SMB2_NT_FIND,
 .cap_large_files = SMB2_LARGE_FILES,
 .create_lease_size = sizeof(struct create_lease_v2),
 .create_durable_size = sizeof(struct create_durable_rsp),
 .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
 .create_mxac_size = sizeof(struct create_mxac_rsp),
 .create_disk_id_size = sizeof(struct create_disk_id_rsp),
 .create_posix_size = sizeof(struct create_posix_rsp),
};

static struct smb_version_values smb302_server_values = {
 .version_string = SMB302_VERSION_STRING,
 .protocol_id = SMB302_PROT_ID,
 .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
 .max_read_size = SMB3_DEFAULT_IOSIZE,
 .max_write_size = SMB3_DEFAULT_IOSIZE,
 .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
 .max_credits = SMB2_MAX_CREDITS,
 .large_lock_type = 0,
 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 .header_size = sizeof(struct smb2_hdr),
 .max_header_size = MAX_SMB2_HDR_SIZE,
 .read_rsp_size = sizeof(struct smb2_read_rsp),
 .lock_cmd = SMB2_LOCK,
 .cap_unix = 0,
 .cap_nt_find = SMB2_NT_FIND,
 .cap_large_files = SMB2_LARGE_FILES,
 .create_lease_size = sizeof(struct create_lease_v2),
 .create_durable_size = sizeof(struct create_durable_rsp),
 .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
 .create_mxac_size = sizeof(struct create_mxac_rsp),
 .create_disk_id_size = sizeof(struct create_disk_id_rsp),
 .create_posix_size = sizeof(struct create_posix_rsp),
};

static struct smb_version_values smb311_server_values = {
 .version_string = SMB311_VERSION_STRING,
 .protocol_id = SMB311_PROT_ID,
 .capabilities = SMB2_GLOBAL_CAP_LARGE_MTU,
 .max_read_size = SMB3_DEFAULT_IOSIZE,
 .max_write_size = SMB3_DEFAULT_IOSIZE,
 .max_trans_size = SMB3_DEFAULT_TRANS_SIZE,
 .max_credits = SMB2_MAX_CREDITS,
 .large_lock_type = 0,
 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 .header_size = sizeof(struct smb2_hdr),
 .max_header_size = MAX_SMB2_HDR_SIZE,
 .read_rsp_size = sizeof(struct smb2_read_rsp),
 .lock_cmd = SMB2_LOCK,
 .cap_unix = 0,
 .cap_nt_find = SMB2_NT_FIND,
 .cap_large_files = SMB2_LARGE_FILES,
 .create_lease_size = sizeof(struct create_lease_v2),
 .create_durable_size = sizeof(struct create_durable_rsp),
 .create_durable_v2_size = sizeof(struct create_durable_v2_rsp),
 .create_mxac_size = sizeof(struct create_mxac_rsp),
 .create_disk_id_size = sizeof(struct create_disk_id_rsp),
 .create_posix_size = sizeof(struct create_posix_rsp),
};

static struct smb_version_ops smb2_0_server_ops = {
 .get_cmd_val  = get_smb2_cmd_val,
 .init_rsp_hdr  = init_smb2_rsp_hdr,
 .set_rsp_status  = set_smb2_rsp_status,
 .allocate_rsp_buf       =       smb2_allocate_rsp_buf,
 .set_rsp_credits = smb2_set_rsp_credits,
 .check_user_session = smb2_check_user_session,
 .get_ksmbd_tcon  = smb2_get_ksmbd_tcon,
 .is_sign_req  = smb2_is_sign_req,
 .check_sign_req  = smb2_check_sign_req,
 .set_sign_rsp  = smb2_set_sign_rsp
};

static struct smb_version_ops smb3_0_server_ops = {
 .get_cmd_val  = get_smb2_cmd_val,
 .init_rsp_hdr  = init_smb2_rsp_hdr,
 .set_rsp_status  = set_smb2_rsp_status,
 .allocate_rsp_buf       =       smb2_allocate_rsp_buf,
 .set_rsp_credits = smb2_set_rsp_credits,
 .check_user_session = smb2_check_user_session,
 .get_ksmbd_tcon  = smb2_get_ksmbd_tcon,
 .is_sign_req  = smb2_is_sign_req,
 .check_sign_req  = smb3_check_sign_req,
 .set_sign_rsp  = smb3_set_sign_rsp,
 .generate_signingkey = ksmbd_gen_smb30_signingkey,
 .generate_encryptionkey = ksmbd_gen_smb30_encryptionkey,
 .is_transform_hdr = smb3_is_transform_hdr,
 .decrypt_req  = smb3_decrypt_req,
 .encrypt_resp  = smb3_encrypt_resp
};

static struct smb_version_ops smb3_11_server_ops = {
 .get_cmd_val  = get_smb2_cmd_val,
 .init_rsp_hdr  = init_smb2_rsp_hdr,
 .set_rsp_status  = set_smb2_rsp_status,
 .allocate_rsp_buf       =       smb2_allocate_rsp_buf,
 .set_rsp_credits = smb2_set_rsp_credits,
 .check_user_session = smb2_check_user_session,
 .get_ksmbd_tcon  = smb2_get_ksmbd_tcon,
 .is_sign_req  = smb2_is_sign_req,
 .check_sign_req  = smb3_check_sign_req,
 .set_sign_rsp  = smb3_set_sign_rsp,
 .generate_signingkey = ksmbd_gen_smb311_signingkey,
 .generate_encryptionkey = ksmbd_gen_smb311_encryptionkey,
 .is_transform_hdr = smb3_is_transform_hdr,
 .decrypt_req  = smb3_decrypt_req,
 .encrypt_resp  = smb3_encrypt_resp
};

static struct smb_version_cmds smb2_0_server_cmds[NUMBER_OF_SMB2_COMMANDS] = {
 [SMB2_NEGOTIATE_HE] = { .proc = smb2_negotiate_request, },
 [SMB2_SESSION_SETUP_HE] = { .proc = smb2_sess_setup, },
 [SMB2_TREE_CONNECT_HE]  = { .proc = smb2_tree_connect,},
 [SMB2_TREE_DISCONNECT_HE]  = { .proc = smb2_tree_disconnect,},
 [SMB2_LOGOFF_HE] = { .proc = smb2_session_logoff,},
 [SMB2_CREATE_HE] = { .proc = smb2_open},
 [SMB2_QUERY_INFO_HE] = { .proc = smb2_query_info},
 [SMB2_QUERY_DIRECTORY_HE] = { .proc = smb2_query_dir},
 [SMB2_CLOSE_HE]  = { .proc = smb2_close},
 [SMB2_ECHO_HE]  = { .proc = smb2_echo},
 [SMB2_SET_INFO_HE]      =       { .proc = smb2_set_info},
 [SMB2_READ_HE]  = { .proc = smb2_read},
 [SMB2_WRITE_HE]  = { .proc = smb2_write},
 [SMB2_FLUSH_HE]  = { .proc = smb2_flush},
 [SMB2_CANCEL_HE] = { .proc = smb2_cancel},
 [SMB2_LOCK_HE]  = { .proc = smb2_lock},
 [SMB2_IOCTL_HE]  = { .proc = smb2_ioctl},
 [SMB2_OPLOCK_BREAK_HE] = { .proc = smb2_oplock_break},
 [SMB2_CHANGE_NOTIFY_HE] = { .proc = smb2_notify},
};

/**
 * init_smb2_1_server() - initialize a smb server connection with smb2.1
 * command dispatcher
 * @conn: connection instance
 */
void init_smb2_1_server(struct ksmbd_conn *conn)
{
 conn->vals = &smb21_server_values;
 conn->ops = &smb2_0_server_ops;
 conn->cmds = smb2_0_server_cmds;
 conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 conn->signing_algorithm = SIGNING_ALG_HMAC_SHA256_LE;

 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
  conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING;
}

/**
 * init_smb3_0_server() - initialize a smb server connection with smb3.0
 * command dispatcher
 * @conn: connection instance
 */
void init_smb3_0_server(struct ksmbd_conn *conn)
{
 conn->vals = &smb30_server_values;
 conn->ops = &smb3_0_server_ops;
 conn->cmds = smb2_0_server_cmds;
 conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE;

 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
  conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING |
   SMB2_GLOBAL_CAP_DIRECTORY_LEASING;

 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION &&
     conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION)
  conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;

 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION ||
     (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) &&
      conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION))
  conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;

 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL)
  conn->vals->capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL;
}

/**
 * init_smb3_02_server() - initialize a smb server connection with smb3.02
 * command dispatcher
 * @conn: connection instance
 */
void init_smb3_02_server(struct ksmbd_conn *conn)
{
 conn->vals = &smb302_server_values;
 conn->ops = &smb3_0_server_ops;
 conn->cmds = smb2_0_server_cmds;
 conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE;

 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
  conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING |
   SMB2_GLOBAL_CAP_DIRECTORY_LEASING;

 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION ||
     (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) &&
      conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION))
  conn->vals->capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION;

 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL)
  conn->vals->capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL;

 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE)
  conn->vals->capabilities |= SMB2_GLOBAL_CAP_PERSISTENT_HANDLES;
}

/**
 * init_smb3_11_server() - initialize a smb server connection with smb3.11
 * command dispatcher
 * @conn: connection instance
 */
int init_smb3_11_server(struct ksmbd_conn *conn)
{
 conn->vals = &smb311_server_values;
 conn->ops = &smb3_11_server_ops;
 conn->cmds = smb2_0_server_cmds;
 conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds);
 conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE;

 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES)
  conn->vals->capabilities |= SMB2_GLOBAL_CAP_LEASING |
   SMB2_GLOBAL_CAP_DIRECTORY_LEASING;

 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL)
  conn->vals->capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL;

 if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE)
  conn->vals->capabilities |= SMB2_GLOBAL_CAP_PERSISTENT_HANDLES;

 INIT_LIST_HEAD(&conn->preauth_sess_table);
 return 0;
}

void init_smb2_max_read_size(unsigned int sz)
{
 sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE);
 smb21_server_values.max_read_size = sz;
 smb30_server_values.max_read_size = sz;
 smb302_server_values.max_read_size = sz;
 smb311_server_values.max_read_size = sz;
}

void init_smb2_max_write_size(unsigned int sz)
{
 sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE);
 smb21_server_values.max_write_size = sz;
 smb30_server_values.max_write_size = sz;
 smb302_server_values.max_write_size = sz;
 smb311_server_values.max_write_size = sz;
}

void init_smb2_max_trans_size(unsigned int sz)
{
 sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE);
 smb21_server_values.max_trans_size = sz;
 smb30_server_values.max_trans_size = sz;
 smb302_server_values.max_trans_size = sz;
 smb311_server_values.max_trans_size = sz;
}

void init_smb2_max_credits(unsigned int sz)
{
 smb21_server_values.max_credits = sz;
 smb30_server_values.max_credits = sz;
 smb302_server_values.max_credits = sz;
 smb311_server_values.max_credits = sz;
}