1 /* 2 * This file and its contents are supplied under the terms of the 3 * Common Development and Distribution License ("CDDL"), version 1.0. 4 * You may only use this file in accordance with the terms of version 5 * 1.0 of the CDDL. 6 * 7 * A full copy of the text of the CDDL should have accompanied this 8 * source. A copy of the CDDL is also available via the Internet at 9 * http://www.illumos.org/license/CDDL. 10 */ 11 12 /* 13 * Copyright 2017 Nexenta Systems, Inc. All rights reserved. 14 */ 15 16 /* 17 * These replace NODIRECT functions of the same name in 18 * $SRC/lib/smbsrv/libsmb/common/smb_kmod.c including: 19 * smb_kmod_bind, smb_kmod_ioctl, smb_kmod_isbound, 20 * smb_kmod_start, smb_kmod_stop, smb_kmod_unbind. 21 * 22 * For all the other smb_kmod_... functions, we can just use the 23 * libsmb code because those all call smb_kmod_ioctl, for which 24 * we have an override here. 25 * 26 * The replacment functions here just call the libfksmbsrv code 27 * directly where the real (in-kernel) versions would be entered 28 * via the driver framework (open, close, ioctl). Aside from that, 29 * the call sequences are intentionally the same (where possible). 30 * In particular, that makes it possible to debug startup/teardown 31 * problems in the user-space version of this code. 32 */ 33 34 #include <sys/types.h> 35 #include <sys/stat.h> 36 #include <sys/ioccom.h> 37 #include <sys/param.h> 38 #include <stddef.h> 39 #include <stdio.h> 40 #include <string.h> 41 #include <strings.h> 42 #include <stdlib.h> 43 #include <unistd.h> 44 #include <fcntl.h> 45 #include <errno.h> 46 #include <note.h> 47 48 #include <smbsrv/smbinfo.h> 49 #include <smbsrv/smb_ioctl.h> 50 #include "smbd.h" 51 52 boolean_t smbdrv_opened = B_FALSE; 53 54 /* 55 * We want to adjust a few things in the standard configuration 56 * passed to the "fake" version of the smbsrv kernel module. 57 * 58 * Reduce the maximum number of connections and workers, just for 59 * convenience while debugging. (Don't want hundreds of threads.) 60 */ 61 static void 62 fksmbd_adjust_config(smb_ioc_header_t *ioc_hdr) 63 { 64 smb_ioc_cfg_t *ioc = (smb_ioc_cfg_t *)ioc_hdr; 65 char *s; 66 67 ioc->maxconnections = 10; 68 ioc->maxworkers = 20; 69 smbd_report("maxconnections=%d, maxworkers=%d", 70 ioc->maxconnections, ioc->maxworkers); 71 72 if ((s = getenv("SMB_MAX_PROTOCOL")) != NULL) { 73 ioc->max_protocol = strtol(s, NULL, 16); 74 smbd_report("max_protocol=0x%x", ioc->max_protocol); 75 } 76 77 if ((s = getenv("SMB_MIN_PROTOCOL")) != NULL) { 78 ioc->min_protocol = strtol(s, NULL, 16); 79 smbd_report("min_protocol=0x%x", ioc->min_protocol); 80 } 81 82 if ((s = getenv("SMB_SIGNING")) != NULL) { 83 ioc->signing_enable = 0; 84 ioc->signing_required = 0; 85 switch (s[0]) { 86 case 'e': 87 ioc->signing_enable = 1; 88 break; 89 case 'r': 90 ioc->signing_enable = 1; 91 ioc->signing_required = 1; 92 break; 93 default: 94 smbd_report("env SMB_SIGNING invalid"); 95 break; 96 } 97 } 98 smbd_report("signing: enable=%d, required=%d", 99 ioc->signing_enable, ioc->signing_required); 100 } 101 102 boolean_t 103 smb_kmod_isbound(void) 104 { 105 return (smbdrv_opened); 106 } 107 108 int 109 smb_kmod_bind(void) 110 { 111 int rc; 112 113 if (smbdrv_opened) { 114 smbdrv_opened = B_FALSE; 115 (void) fksmbsrv_drv_close(); 116 } 117 118 rc = fksmbsrv_drv_open(); 119 if (rc == 0) 120 smbdrv_opened = B_TRUE; 121 122 return (rc); 123 } 124 125 void 126 smb_kmod_unbind(void) 127 { 128 if (smbdrv_opened) { 129 smbdrv_opened = B_FALSE; 130 (void) fksmbsrv_drv_close(); 131 } 132 } 133 134 int 135 smb_kmod_ioctl(int cmd, smb_ioc_header_t *ioc, uint32_t len) 136 { 137 int rc; 138 139 _NOTE(ARGUNUSED(len)); 140 141 if (!smbdrv_opened) 142 return (EBADF); 143 144 if (cmd == SMB_IOC_CONFIG) 145 fksmbd_adjust_config(ioc); 146 147 rc = fksmbsrv_drv_ioctl(cmd, ioc); 148 return (rc); 149 } 150 151 /* ARGSUSED */ 152 int 153 smb_kmod_start(int opipe, int lmshr, int udoor) 154 { 155 smb_ioc_start_t ioc; 156 int rc; 157 158 bzero(&ioc, sizeof (ioc)); 159 160 /* These three are unused */ 161 ioc.opipe = -1; 162 ioc.lmshrd = -1; 163 ioc.udoor = -1; 164 165 /* These are the "door" dispatch callbacks */ 166 ioc.lmshr_func = NULL; /* not used */ 167 ioc.opipe_func = NULL; /* not used */ 168 ioc.udoor_func = (void *)fksmbd_door_dispatch; 169 170 rc = smb_kmod_ioctl(SMB_IOC_START, &ioc.hdr, sizeof (ioc)); 171 return (rc); 172 } 173 174 void 175 smb_kmod_stop(void) 176 { 177 smb_ioc_header_t ioc; 178 179 bzero(&ioc, sizeof (ioc)); 180 (void) smb_kmod_ioctl(SMB_IOC_STOP, &ioc, sizeof (ioc)); 181 } 182