Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/smb2pdu.c |
| 3 | * |
Steve French | 2b80d04 | 2013-06-23 18:43:37 -0500 | [diff] [blame^] | 4 | * Copyright (C) International Business Machines Corp., 2009, 2013 |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 5 | * Etersoft, 2012 |
| 6 | * Author(s): Steve French (sfrench@us.ibm.com) |
| 7 | * Pavel Shilovsky (pshilovsky@samba.org) 2012 |
| 8 | * |
| 9 | * Contains the routines for constructing the SMB2 PDUs themselves |
| 10 | * |
| 11 | * This library is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU Lesser General Public License as published |
| 13 | * by the Free Software Foundation; either version 2.1 of the License, or |
| 14 | * (at your option) any later version. |
| 15 | * |
| 16 | * This library is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 19 | * the GNU Lesser General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU Lesser General Public License |
| 22 | * along with this library; if not, write to the Free Software |
| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 24 | */ |
| 25 | |
| 26 | /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */ |
| 27 | /* Note that there are handle based routines which must be */ |
| 28 | /* treated slightly differently for reconnection purposes since we never */ |
| 29 | /* want to reuse a stale file handle and only the caller knows the file info */ |
| 30 | |
| 31 | #include <linux/fs.h> |
| 32 | #include <linux/kernel.h> |
| 33 | #include <linux/vfs.h> |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 34 | #include <linux/task_io_accounting_ops.h> |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 35 | #include <linux/uaccess.h> |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 36 | #include <linux/pagemap.h> |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 37 | #include <linux/xattr.h> |
| 38 | #include "smb2pdu.h" |
| 39 | #include "cifsglob.h" |
| 40 | #include "cifsacl.h" |
| 41 | #include "cifsproto.h" |
| 42 | #include "smb2proto.h" |
| 43 | #include "cifs_unicode.h" |
| 44 | #include "cifs_debug.h" |
| 45 | #include "ntlmssp.h" |
| 46 | #include "smb2status.h" |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 47 | #include "smb2glob.h" |
Pavel Shilovsky | d324f08d | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 48 | #include "cifspdu.h" |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 49 | |
| 50 | /* |
| 51 | * The following table defines the expected "StructureSize" of SMB2 requests |
| 52 | * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests. |
| 53 | * |
| 54 | * Note that commands are defined in smb2pdu.h in le16 but the array below is |
| 55 | * indexed by command in host byte order. |
| 56 | */ |
| 57 | static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = { |
| 58 | /* SMB2_NEGOTIATE */ 36, |
| 59 | /* SMB2_SESSION_SETUP */ 25, |
| 60 | /* SMB2_LOGOFF */ 4, |
| 61 | /* SMB2_TREE_CONNECT */ 9, |
| 62 | /* SMB2_TREE_DISCONNECT */ 4, |
| 63 | /* SMB2_CREATE */ 57, |
| 64 | /* SMB2_CLOSE */ 24, |
| 65 | /* SMB2_FLUSH */ 24, |
| 66 | /* SMB2_READ */ 49, |
| 67 | /* SMB2_WRITE */ 49, |
| 68 | /* SMB2_LOCK */ 48, |
| 69 | /* SMB2_IOCTL */ 57, |
| 70 | /* SMB2_CANCEL */ 4, |
| 71 | /* SMB2_ECHO */ 4, |
| 72 | /* SMB2_QUERY_DIRECTORY */ 33, |
| 73 | /* SMB2_CHANGE_NOTIFY */ 32, |
| 74 | /* SMB2_QUERY_INFO */ 41, |
| 75 | /* SMB2_SET_INFO */ 33, |
| 76 | /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */ |
| 77 | }; |
| 78 | |
| 79 | |
| 80 | static void |
| 81 | smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ , |
| 82 | const struct cifs_tcon *tcon) |
| 83 | { |
| 84 | struct smb2_pdu *pdu = (struct smb2_pdu *)hdr; |
| 85 | char *temp = (char *)hdr; |
| 86 | /* lookup word count ie StructureSize from table */ |
| 87 | __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)]; |
| 88 | |
| 89 | /* |
| 90 | * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of |
| 91 | * largest operations (Create) |
| 92 | */ |
| 93 | memset(temp, 0, 256); |
| 94 | |
| 95 | /* Note this is only network field converted to big endian */ |
| 96 | hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr) |
| 97 | - 4 /* RFC 1001 length field itself not counted */); |
| 98 | |
| 99 | hdr->ProtocolId[0] = 0xFE; |
| 100 | hdr->ProtocolId[1] = 'S'; |
| 101 | hdr->ProtocolId[2] = 'M'; |
| 102 | hdr->ProtocolId[3] = 'B'; |
| 103 | hdr->StructureSize = cpu_to_le16(64); |
| 104 | hdr->Command = smb2_cmd; |
| 105 | hdr->CreditRequest = cpu_to_le16(2); /* BB make this dynamic */ |
| 106 | hdr->ProcessId = cpu_to_le32((__u16)current->tgid); |
| 107 | |
| 108 | if (!tcon) |
| 109 | goto out; |
| 110 | |
Steve French | 2b80d04 | 2013-06-23 18:43:37 -0500 | [diff] [blame^] | 111 | /* BB FIXME when we do write > 64K add +1 for every 64K in req or rsp */ |
| 112 | /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */ |
| 113 | /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */ |
| 114 | if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU) |
| 115 | hdr->CreditCharge = cpu_to_le16(1); |
| 116 | /* else CreditCharge MBZ */ |
| 117 | |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 118 | hdr->TreeId = tcon->tid; |
| 119 | /* Uid is not converted */ |
| 120 | if (tcon->ses) |
| 121 | hdr->SessionId = tcon->ses->Suid; |
| 122 | /* BB check following DFS flags BB */ |
| 123 | /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */ |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 124 | if (tcon->share_flags & SHI1005_FLAGS_DFS) |
| 125 | hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 126 | /* BB how does SMB2 do case sensitive? */ |
| 127 | /* if (tcon->nocase) |
| 128 | hdr->Flags |= SMBFLG_CASELESS; */ |
Jeff Layton | 38d77c5 | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 129 | if (tcon->ses && tcon->ses->server && tcon->ses->server->sign) |
Pavel Shilovsky | 3c1bf7e | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 130 | hdr->Flags |= SMB2_FLAGS_SIGNED; |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 131 | out: |
| 132 | pdu->StructureSize2 = cpu_to_le16(parmsize); |
| 133 | return; |
| 134 | } |
| 135 | |
| 136 | static int |
| 137 | smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) |
| 138 | { |
| 139 | int rc = 0; |
Pavel Shilovsky | aa24d1e | 2011-12-27 16:23:34 +0400 | [diff] [blame] | 140 | struct nls_table *nls_codepage; |
| 141 | struct cifs_ses *ses; |
| 142 | struct TCP_Server_Info *server; |
| 143 | |
| 144 | /* |
| 145 | * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so |
| 146 | * check for tcp and smb session status done differently |
| 147 | * for those three - in the calling routine. |
| 148 | */ |
| 149 | if (tcon == NULL) |
| 150 | return rc; |
| 151 | |
| 152 | if (smb2_command == SMB2_TREE_CONNECT) |
| 153 | return rc; |
| 154 | |
| 155 | if (tcon->tidStatus == CifsExiting) { |
| 156 | /* |
| 157 | * only tree disconnect, open, and write, |
| 158 | * (and ulogoff which does not have tcon) |
| 159 | * are allowed as we start force umount. |
| 160 | */ |
| 161 | if ((smb2_command != SMB2_WRITE) && |
| 162 | (smb2_command != SMB2_CREATE) && |
| 163 | (smb2_command != SMB2_TREE_DISCONNECT)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 164 | cifs_dbg(FYI, "can not send cmd %d while umounting\n", |
| 165 | smb2_command); |
Pavel Shilovsky | aa24d1e | 2011-12-27 16:23:34 +0400 | [diff] [blame] | 166 | return -ENODEV; |
| 167 | } |
| 168 | } |
| 169 | if ((!tcon->ses) || (tcon->ses->status == CifsExiting) || |
| 170 | (!tcon->ses->server)) |
| 171 | return -EIO; |
| 172 | |
| 173 | ses = tcon->ses; |
| 174 | server = ses->server; |
| 175 | |
| 176 | /* |
| 177 | * Give demultiplex thread up to 10 seconds to reconnect, should be |
| 178 | * greater than cifs socket timeout which is 7 seconds |
| 179 | */ |
| 180 | while (server->tcpStatus == CifsNeedReconnect) { |
| 181 | /* |
| 182 | * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE |
| 183 | * here since they are implicitly done when session drops. |
| 184 | */ |
| 185 | switch (smb2_command) { |
| 186 | /* |
| 187 | * BB Should we keep oplock break and add flush to exceptions? |
| 188 | */ |
| 189 | case SMB2_TREE_DISCONNECT: |
| 190 | case SMB2_CANCEL: |
| 191 | case SMB2_CLOSE: |
| 192 | case SMB2_OPLOCK_BREAK: |
| 193 | return -EAGAIN; |
| 194 | } |
| 195 | |
| 196 | wait_event_interruptible_timeout(server->response_q, |
| 197 | (server->tcpStatus != CifsNeedReconnect), 10 * HZ); |
| 198 | |
| 199 | /* are we still trying to reconnect? */ |
| 200 | if (server->tcpStatus != CifsNeedReconnect) |
| 201 | break; |
| 202 | |
| 203 | /* |
| 204 | * on "soft" mounts we wait once. Hard mounts keep |
| 205 | * retrying until process is killed or server comes |
| 206 | * back on-line |
| 207 | */ |
| 208 | if (!tcon->retry) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 209 | cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n"); |
Pavel Shilovsky | aa24d1e | 2011-12-27 16:23:34 +0400 | [diff] [blame] | 210 | return -EHOSTDOWN; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | if (!tcon->ses->need_reconnect && !tcon->need_reconnect) |
| 215 | return rc; |
| 216 | |
| 217 | nls_codepage = load_nls_default(); |
| 218 | |
| 219 | /* |
| 220 | * need to prevent multiple threads trying to simultaneously reconnect |
| 221 | * the same SMB session |
| 222 | */ |
| 223 | mutex_lock(&tcon->ses->session_mutex); |
| 224 | rc = cifs_negotiate_protocol(0, tcon->ses); |
| 225 | if (!rc && tcon->ses->need_reconnect) |
| 226 | rc = cifs_setup_session(0, tcon->ses, nls_codepage); |
| 227 | |
| 228 | if (rc || !tcon->need_reconnect) { |
| 229 | mutex_unlock(&tcon->ses->session_mutex); |
| 230 | goto out; |
| 231 | } |
| 232 | |
| 233 | cifs_mark_open_files_invalid(tcon); |
| 234 | rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage); |
| 235 | mutex_unlock(&tcon->ses->session_mutex); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 236 | cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); |
Pavel Shilovsky | aa24d1e | 2011-12-27 16:23:34 +0400 | [diff] [blame] | 237 | if (rc) |
| 238 | goto out; |
| 239 | atomic_inc(&tconInfoReconnectCount); |
| 240 | /* |
| 241 | * BB FIXME add code to check if wsize needs update due to negotiated |
| 242 | * smb buffer size shrinking. |
| 243 | */ |
| 244 | out: |
| 245 | /* |
| 246 | * Check if handle based operation so we know whether we can continue |
| 247 | * or not without returning to caller to reset file handle. |
| 248 | */ |
| 249 | /* |
| 250 | * BB Is flush done by server on drop of tcp session? Should we special |
| 251 | * case it and skip above? |
| 252 | */ |
| 253 | switch (smb2_command) { |
| 254 | case SMB2_FLUSH: |
| 255 | case SMB2_READ: |
| 256 | case SMB2_WRITE: |
| 257 | case SMB2_LOCK: |
| 258 | case SMB2_IOCTL: |
| 259 | case SMB2_QUERY_DIRECTORY: |
| 260 | case SMB2_CHANGE_NOTIFY: |
| 261 | case SMB2_QUERY_INFO: |
| 262 | case SMB2_SET_INFO: |
| 263 | return -EAGAIN; |
| 264 | } |
| 265 | unload_nls(nls_codepage); |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 266 | return rc; |
| 267 | } |
| 268 | |
| 269 | /* |
| 270 | * Allocate and return pointer to an SMB request hdr, and set basic |
| 271 | * SMB information in the SMB header. If the return code is zero, this |
| 272 | * function must have filled in request_buf pointer. |
| 273 | */ |
| 274 | static int |
| 275 | small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon, |
| 276 | void **request_buf) |
| 277 | { |
| 278 | int rc = 0; |
| 279 | |
| 280 | rc = smb2_reconnect(smb2_command, tcon); |
| 281 | if (rc) |
| 282 | return rc; |
| 283 | |
| 284 | /* BB eventually switch this to SMB2 specific small buf size */ |
| 285 | *request_buf = cifs_small_buf_get(); |
| 286 | if (*request_buf == NULL) { |
| 287 | /* BB should we add a retry in here if not a writepage? */ |
| 288 | return -ENOMEM; |
| 289 | } |
| 290 | |
| 291 | smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon); |
| 292 | |
| 293 | if (tcon != NULL) { |
| 294 | #ifdef CONFIG_CIFS_STATS2 |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 295 | uint16_t com_code = le16_to_cpu(smb2_command); |
| 296 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 297 | #endif |
| 298 | cifs_stats_inc(&tcon->num_smbs_sent); |
| 299 | } |
| 300 | |
| 301 | return rc; |
| 302 | } |
| 303 | |
| 304 | static void |
| 305 | free_rsp_buf(int resp_buftype, void *rsp) |
| 306 | { |
| 307 | if (resp_buftype == CIFS_SMALL_BUFFER) |
| 308 | cifs_small_buf_release(rsp); |
| 309 | else if (resp_buftype == CIFS_LARGE_BUFFER) |
| 310 | cifs_buf_release(rsp); |
| 311 | } |
| 312 | |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 313 | |
| 314 | /* |
| 315 | * |
| 316 | * SMB2 Worker functions follow: |
| 317 | * |
| 318 | * The general structure of the worker functions is: |
| 319 | * 1) Call smb2_init (assembles SMB2 header) |
| 320 | * 2) Initialize SMB2 command specific fields in fixed length area of SMB |
| 321 | * 3) Call smb_sendrcv2 (sends request on socket and waits for response) |
| 322 | * 4) Decode SMB2 command specific fields in the fixed length area |
| 323 | * 5) Decode variable length data area (if any for this SMB2 command type) |
| 324 | * 6) Call free smb buffer |
| 325 | * 7) return |
| 326 | * |
| 327 | */ |
| 328 | |
| 329 | int |
| 330 | SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) |
| 331 | { |
| 332 | struct smb2_negotiate_req *req; |
| 333 | struct smb2_negotiate_rsp *rsp; |
| 334 | struct kvec iov[1]; |
| 335 | int rc = 0; |
| 336 | int resp_buftype; |
Jeff Layton | 3534b85 | 2013-05-24 07:41:01 -0400 | [diff] [blame] | 337 | struct TCP_Server_Info *server = ses->server; |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 338 | int blob_offset, blob_length; |
| 339 | char *security_blob; |
| 340 | int flags = CIFS_NEG_OP; |
| 341 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 342 | cifs_dbg(FYI, "Negotiate protocol\n"); |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 343 | |
Jeff Layton | 3534b85 | 2013-05-24 07:41:01 -0400 | [diff] [blame] | 344 | if (!server) { |
| 345 | WARN(1, "%s: server is NULL!\n", __func__); |
| 346 | return -EIO; |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req); |
| 350 | if (rc) |
| 351 | return rc; |
| 352 | |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 353 | req->hdr.SessionId = 0; |
| 354 | |
Steve French | e4aa25e | 2012-10-01 12:26:22 -0500 | [diff] [blame] | 355 | req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id); |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 356 | |
Steve French | e4aa25e | 2012-10-01 12:26:22 -0500 | [diff] [blame] | 357 | req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */ |
| 358 | inc_rfc1001_len(req, 2); |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 359 | |
| 360 | /* only one of SMB2 signing flags may be set in SMB2 request */ |
Jeff Layton | 38d77c5 | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 361 | if (ses->sign) |
Steve French | 9cd2e62 | 2013-06-12 19:59:03 -0500 | [diff] [blame] | 362 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED); |
Jeff Layton | 38d77c5 | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 363 | else if (global_secflags & CIFSSEC_MAY_SIGN) |
Steve French | 9cd2e62 | 2013-06-12 19:59:03 -0500 | [diff] [blame] | 364 | req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED); |
Jeff Layton | 38d77c5 | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 365 | else |
| 366 | req->SecurityMode = 0; |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 367 | |
Steve French | e4aa25e | 2012-10-01 12:26:22 -0500 | [diff] [blame] | 368 | req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities); |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 369 | |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 370 | memcpy(req->ClientGUID, cifs_client_guid, SMB2_CLIENT_GUID_SIZE); |
| 371 | |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 372 | iov[0].iov_base = (char *)req; |
| 373 | /* 4 for rfc1002 length field */ |
| 374 | iov[0].iov_len = get_rfc1002_length(req) + 4; |
| 375 | |
| 376 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags); |
| 377 | |
| 378 | rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base; |
| 379 | /* |
| 380 | * No tcon so can't do |
| 381 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); |
| 382 | */ |
| 383 | if (rc != 0) |
| 384 | goto neg_exit; |
| 385 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 386 | cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 387 | |
Steve French | e4aa25e | 2012-10-01 12:26:22 -0500 | [diff] [blame] | 388 | /* BB we may eventually want to match the negotiated vs. requested |
| 389 | dialect, even though we are only requesting one at a time */ |
| 390 | if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 391 | cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); |
Steve French | e4aa25e | 2012-10-01 12:26:22 -0500 | [diff] [blame] | 392 | else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 393 | cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); |
Steve French | e4aa25e | 2012-10-01 12:26:22 -0500 | [diff] [blame] | 394 | else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 395 | cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); |
Steve French | 20b6d8b | 2013-06-12 22:48:41 -0500 | [diff] [blame] | 396 | else if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID)) |
| 397 | cifs_dbg(FYI, "negotiated smb3.02 dialect\n"); |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 398 | else { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 399 | cifs_dbg(VFS, "Illegal dialect returned by server %d\n", |
| 400 | le16_to_cpu(rsp->DialectRevision)); |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 401 | rc = -EIO; |
| 402 | goto neg_exit; |
| 403 | } |
| 404 | server->dialect = le16_to_cpu(rsp->DialectRevision); |
| 405 | |
Jeff Layton | e598d1d8 | 2013-05-26 07:00:59 -0400 | [diff] [blame] | 406 | /* SMB2 only has an extended negflavor */ |
| 407 | server->negflavor = CIFS_NEGFLAVOR_EXTENDED; |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 408 | server->maxBuf = le32_to_cpu(rsp->MaxTransactSize); |
| 409 | server->max_read = le32_to_cpu(rsp->MaxReadSize); |
| 410 | server->max_write = le32_to_cpu(rsp->MaxWriteSize); |
| 411 | /* BB Do we need to validate the SecurityMode? */ |
| 412 | server->sec_mode = le16_to_cpu(rsp->SecurityMode); |
| 413 | server->capabilities = le32_to_cpu(rsp->Capabilities); |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 414 | /* Internal types */ |
| 415 | server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 416 | |
| 417 | security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, |
| 418 | &rsp->hdr); |
| 419 | if (blob_length == 0) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 420 | cifs_dbg(VFS, "missing security blob on negprot\n"); |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 421 | rc = -EIO; |
| 422 | goto neg_exit; |
| 423 | } |
Pavel Shilovsky | 3c1bf7e | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 424 | |
Jeff Layton | 38d77c5 | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 425 | rc = cifs_enable_signing(server, ses->sign); |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 426 | #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */ |
Jeff Layton | 9ddec56 | 2013-05-26 07:00:58 -0400 | [diff] [blame] | 427 | if (rc) |
| 428 | goto neg_exit; |
| 429 | |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 430 | rc = decode_neg_token_init(security_blob, blob_length, |
| 431 | &server->sec_type); |
| 432 | if (rc == 1) |
| 433 | rc = 0; |
| 434 | else if (rc == 0) { |
| 435 | rc = -EIO; |
| 436 | goto neg_exit; |
| 437 | } |
| 438 | #endif |
| 439 | |
| 440 | neg_exit: |
| 441 | free_rsp_buf(resp_buftype, rsp); |
| 442 | return rc; |
| 443 | } |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 444 | |
| 445 | int |
| 446 | SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, |
| 447 | const struct nls_table *nls_cp) |
| 448 | { |
| 449 | struct smb2_sess_setup_req *req; |
| 450 | struct smb2_sess_setup_rsp *rsp = NULL; |
| 451 | struct kvec iov[2]; |
| 452 | int rc = 0; |
| 453 | int resp_buftype; |
| 454 | __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ |
Jeff Layton | 3534b85 | 2013-05-24 07:41:01 -0400 | [diff] [blame] | 455 | struct TCP_Server_Info *server = ses->server; |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 456 | u16 blob_length = 0; |
| 457 | char *security_blob; |
| 458 | char *ntlmssp_blob = NULL; |
| 459 | bool use_spnego = false; /* else use raw ntlmssp */ |
| 460 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 461 | cifs_dbg(FYI, "Session Setup\n"); |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 462 | |
Jeff Layton | 3534b85 | 2013-05-24 07:41:01 -0400 | [diff] [blame] | 463 | if (!server) { |
| 464 | WARN(1, "%s: server is NULL!\n", __func__); |
| 465 | return -EIO; |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 466 | } |
| 467 | |
| 468 | /* |
| 469 | * If memory allocation is successful, caller of this function |
| 470 | * frees it. |
| 471 | */ |
| 472 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); |
| 473 | if (!ses->ntlmssp) |
| 474 | return -ENOMEM; |
| 475 | |
Jeff Layton | 3f61822 | 2013-06-12 19:52:14 -0500 | [diff] [blame] | 476 | /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */ |
| 477 | ses->sectype = RawNTLMSSP; |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 478 | |
| 479 | ssetup_ntlmssp_authenticate: |
| 480 | if (phase == NtLmChallenge) |
| 481 | phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ |
| 482 | |
| 483 | rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req); |
| 484 | if (rc) |
| 485 | return rc; |
| 486 | |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 487 | req->hdr.SessionId = 0; /* First session, not a reauthenticate */ |
| 488 | req->VcNumber = 0; /* MBZ */ |
| 489 | /* to enable echos and oplocks */ |
| 490 | req->hdr.CreditRequest = cpu_to_le16(3); |
| 491 | |
| 492 | /* only one of SMB2 signing flags may be set in SMB2 request */ |
Jeff Layton | 38d77c5 | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 493 | if (server->sign) |
| 494 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; |
| 495 | else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */ |
| 496 | req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; |
| 497 | else |
| 498 | req->SecurityMode = 0; |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 499 | |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 500 | req->Capabilities = 0; |
| 501 | req->Channel = 0; /* MBZ */ |
| 502 | |
| 503 | iov[0].iov_base = (char *)req; |
| 504 | /* 4 for rfc1002 length field and 1 for pad */ |
| 505 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; |
| 506 | if (phase == NtLmNegotiate) { |
| 507 | ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE), |
| 508 | GFP_KERNEL); |
| 509 | if (ntlmssp_blob == NULL) { |
| 510 | rc = -ENOMEM; |
| 511 | goto ssetup_exit; |
| 512 | } |
| 513 | build_ntlmssp_negotiate_blob(ntlmssp_blob, ses); |
| 514 | if (use_spnego) { |
| 515 | /* blob_length = build_spnego_ntlmssp_blob( |
| 516 | &security_blob, |
| 517 | sizeof(struct _NEGOTIATE_MESSAGE), |
| 518 | ntlmssp_blob); */ |
| 519 | /* BB eventually need to add this */ |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 520 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 521 | rc = -EOPNOTSUPP; |
| 522 | kfree(ntlmssp_blob); |
| 523 | goto ssetup_exit; |
| 524 | } else { |
| 525 | blob_length = sizeof(struct _NEGOTIATE_MESSAGE); |
| 526 | /* with raw NTLMSSP we don't encapsulate in SPNEGO */ |
| 527 | security_blob = ntlmssp_blob; |
| 528 | } |
| 529 | } else if (phase == NtLmAuthenticate) { |
| 530 | req->hdr.SessionId = ses->Suid; |
| 531 | ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500, |
| 532 | GFP_KERNEL); |
| 533 | if (ntlmssp_blob == NULL) { |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 534 | rc = -ENOMEM; |
| 535 | goto ssetup_exit; |
| 536 | } |
| 537 | rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses, |
| 538 | nls_cp); |
| 539 | if (rc) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 540 | cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", |
| 541 | rc); |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 542 | goto ssetup_exit; /* BB double check error handling */ |
| 543 | } |
| 544 | if (use_spnego) { |
| 545 | /* blob_length = build_spnego_ntlmssp_blob( |
| 546 | &security_blob, |
| 547 | blob_length, |
| 548 | ntlmssp_blob); */ |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 549 | cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 550 | rc = -EOPNOTSUPP; |
| 551 | kfree(ntlmssp_blob); |
| 552 | goto ssetup_exit; |
| 553 | } else { |
| 554 | security_blob = ntlmssp_blob; |
| 555 | } |
| 556 | } else { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 557 | cifs_dbg(VFS, "illegal ntlmssp phase\n"); |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 558 | rc = -EIO; |
| 559 | goto ssetup_exit; |
| 560 | } |
| 561 | |
| 562 | /* Testing shows that buffer offset must be at location of Buffer[0] */ |
| 563 | req->SecurityBufferOffset = |
| 564 | cpu_to_le16(sizeof(struct smb2_sess_setup_req) - |
| 565 | 1 /* pad */ - 4 /* rfc1001 len */); |
| 566 | req->SecurityBufferLength = cpu_to_le16(blob_length); |
| 567 | iov[1].iov_base = security_blob; |
| 568 | iov[1].iov_len = blob_length; |
| 569 | |
| 570 | inc_rfc1001_len(req, blob_length - 1 /* pad */); |
| 571 | |
| 572 | /* BB add code to build os and lm fields */ |
| 573 | |
Steve French | 6d8b59d | 2012-12-08 22:36:29 -0600 | [diff] [blame] | 574 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, |
| 575 | CIFS_LOG_ERROR | CIFS_NEG_OP); |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 576 | |
| 577 | kfree(security_blob); |
| 578 | rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base; |
Pavel Shilovsky | 4ca3a99 | 2012-09-25 11:00:09 +0400 | [diff] [blame] | 579 | if (resp_buftype != CIFS_NO_BUFFER && |
| 580 | rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) { |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 581 | if (phase != NtLmNegotiate) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 582 | cifs_dbg(VFS, "Unexpected more processing error\n"); |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 583 | goto ssetup_exit; |
| 584 | } |
| 585 | if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 != |
Pavel Shilovsky | 4ca3a99 | 2012-09-25 11:00:09 +0400 | [diff] [blame] | 586 | le16_to_cpu(rsp->SecurityBufferOffset)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 587 | cifs_dbg(VFS, "Invalid security buffer offset %d\n", |
| 588 | le16_to_cpu(rsp->SecurityBufferOffset)); |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 589 | rc = -EIO; |
| 590 | goto ssetup_exit; |
| 591 | } |
| 592 | |
| 593 | /* NTLMSSP Negotiate sent now processing challenge (response) */ |
| 594 | phase = NtLmChallenge; /* process ntlmssp challenge */ |
| 595 | rc = 0; /* MORE_PROCESSING is not an error here but expected */ |
| 596 | ses->Suid = rsp->hdr.SessionId; |
| 597 | rc = decode_ntlmssp_challenge(rsp->Buffer, |
| 598 | le16_to_cpu(rsp->SecurityBufferLength), ses); |
| 599 | } |
| 600 | |
| 601 | /* |
| 602 | * BB eventually add code for SPNEGO decoding of NtlmChallenge blob, |
| 603 | * but at least the raw NTLMSSP case works. |
| 604 | */ |
| 605 | /* |
| 606 | * No tcon so can't do |
| 607 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); |
| 608 | */ |
| 609 | if (rc != 0) |
| 610 | goto ssetup_exit; |
| 611 | |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 612 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
| 613 | ssetup_exit: |
| 614 | free_rsp_buf(resp_buftype, rsp); |
| 615 | |
| 616 | /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ |
| 617 | if ((phase == NtLmChallenge) && (rc == 0)) |
| 618 | goto ssetup_ntlmssp_authenticate; |
| 619 | return rc; |
| 620 | } |
| 621 | |
| 622 | int |
| 623 | SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) |
| 624 | { |
| 625 | struct smb2_logoff_req *req; /* response is also trivial struct */ |
| 626 | int rc = 0; |
| 627 | struct TCP_Server_Info *server; |
| 628 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 629 | cifs_dbg(FYI, "disconnect session %p\n", ses); |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 630 | |
| 631 | if (ses && (ses->server)) |
| 632 | server = ses->server; |
| 633 | else |
| 634 | return -EIO; |
| 635 | |
| 636 | rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req); |
| 637 | if (rc) |
| 638 | return rc; |
| 639 | |
| 640 | /* since no tcon, smb2_init can not do this, so do here */ |
| 641 | req->hdr.SessionId = ses->Suid; |
Jeff Layton | 38d77c5 | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 642 | if (server->sign) |
Pavel Shilovsky | 3c1bf7e | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 643 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 644 | |
| 645 | rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0); |
| 646 | /* |
| 647 | * No tcon so can't do |
| 648 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); |
| 649 | */ |
| 650 | return rc; |
| 651 | } |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 652 | |
| 653 | static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) |
| 654 | { |
Pavel Shilovsky | d60622e | 2012-05-28 15:19:39 +0400 | [diff] [blame] | 655 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 656 | } |
| 657 | |
| 658 | #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) |
| 659 | |
| 660 | int |
| 661 | SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, |
| 662 | struct cifs_tcon *tcon, const struct nls_table *cp) |
| 663 | { |
| 664 | struct smb2_tree_connect_req *req; |
| 665 | struct smb2_tree_connect_rsp *rsp = NULL; |
| 666 | struct kvec iov[2]; |
| 667 | int rc = 0; |
| 668 | int resp_buftype; |
| 669 | int unc_path_len; |
| 670 | struct TCP_Server_Info *server; |
| 671 | __le16 *unc_path = NULL; |
| 672 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 673 | cifs_dbg(FYI, "TCON\n"); |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 674 | |
| 675 | if ((ses->server) && tree) |
| 676 | server = ses->server; |
| 677 | else |
| 678 | return -EIO; |
| 679 | |
| 680 | if (tcon && tcon->bad_network_name) |
| 681 | return -ENOENT; |
| 682 | |
| 683 | unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); |
| 684 | if (unc_path == NULL) |
| 685 | return -ENOMEM; |
| 686 | |
| 687 | unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1; |
| 688 | unc_path_len *= 2; |
| 689 | if (unc_path_len < 2) { |
| 690 | kfree(unc_path); |
| 691 | return -EINVAL; |
| 692 | } |
| 693 | |
| 694 | rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req); |
| 695 | if (rc) { |
| 696 | kfree(unc_path); |
| 697 | return rc; |
| 698 | } |
| 699 | |
| 700 | if (tcon == NULL) { |
| 701 | /* since no tcon, smb2_init can not do this, so do here */ |
| 702 | req->hdr.SessionId = ses->Suid; |
| 703 | /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED) |
| 704 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; */ |
| 705 | } |
| 706 | |
| 707 | iov[0].iov_base = (char *)req; |
| 708 | /* 4 for rfc1002 length field and 1 for pad */ |
| 709 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; |
| 710 | |
| 711 | /* Testing shows that buffer offset must be at location of Buffer[0] */ |
| 712 | req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) |
| 713 | - 1 /* pad */ - 4 /* do not count rfc1001 len field */); |
| 714 | req->PathLength = cpu_to_le16(unc_path_len - 2); |
| 715 | iov[1].iov_base = unc_path; |
| 716 | iov[1].iov_len = unc_path_len; |
| 717 | |
| 718 | inc_rfc1001_len(req, unc_path_len - 1 /* pad */); |
| 719 | |
| 720 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); |
| 721 | rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base; |
| 722 | |
| 723 | if (rc != 0) { |
| 724 | if (tcon) { |
| 725 | cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); |
| 726 | tcon->need_reconnect = true; |
| 727 | } |
| 728 | goto tcon_error_exit; |
| 729 | } |
| 730 | |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 731 | if (tcon == NULL) { |
| 732 | ses->ipc_tid = rsp->hdr.TreeId; |
| 733 | goto tcon_exit; |
| 734 | } |
| 735 | |
| 736 | if (rsp->ShareType & SMB2_SHARE_TYPE_DISK) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 737 | cifs_dbg(FYI, "connection to disk share\n"); |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 738 | else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) { |
| 739 | tcon->ipc = true; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 740 | cifs_dbg(FYI, "connection to pipe share\n"); |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 741 | } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) { |
| 742 | tcon->print = true; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 743 | cifs_dbg(FYI, "connection to printer\n"); |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 744 | } else { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 745 | cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType); |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 746 | rc = -EOPNOTSUPP; |
| 747 | goto tcon_error_exit; |
| 748 | } |
| 749 | |
| 750 | tcon->share_flags = le32_to_cpu(rsp->ShareFlags); |
Steve French | 769ee6a | 2013-06-19 14:15:30 -0500 | [diff] [blame] | 751 | tcon->capabilities = rsp->Capabilities; /* we keep caps little endian */ |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 752 | tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); |
| 753 | tcon->tidStatus = CifsGood; |
| 754 | tcon->need_reconnect = false; |
| 755 | tcon->tid = rsp->hdr.TreeId; |
Zhao Hongjiang | 46b51d0 | 2013-06-24 01:57:47 -0500 | [diff] [blame] | 756 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 757 | |
| 758 | if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && |
| 759 | ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 760 | cifs_dbg(VFS, "DFS capability contradicts DFS flag\n"); |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 761 | |
| 762 | tcon_exit: |
| 763 | free_rsp_buf(resp_buftype, rsp); |
| 764 | kfree(unc_path); |
| 765 | return rc; |
| 766 | |
| 767 | tcon_error_exit: |
| 768 | if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 769 | cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 770 | tcon->bad_network_name = true; |
| 771 | } |
| 772 | goto tcon_exit; |
| 773 | } |
| 774 | |
| 775 | int |
| 776 | SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) |
| 777 | { |
| 778 | struct smb2_tree_disconnect_req *req; /* response is trivial */ |
| 779 | int rc = 0; |
| 780 | struct TCP_Server_Info *server; |
| 781 | struct cifs_ses *ses = tcon->ses; |
| 782 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 783 | cifs_dbg(FYI, "Tree Disconnect\n"); |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 784 | |
| 785 | if (ses && (ses->server)) |
| 786 | server = ses->server; |
| 787 | else |
| 788 | return -EIO; |
| 789 | |
| 790 | if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) |
| 791 | return 0; |
| 792 | |
| 793 | rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req); |
| 794 | if (rc) |
| 795 | return rc; |
| 796 | |
| 797 | rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0); |
| 798 | if (rc) |
| 799 | cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); |
| 800 | |
| 801 | return rc; |
| 802 | } |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 803 | |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 804 | static struct create_lease * |
| 805 | create_lease_buf(u8 *lease_key, u8 oplock) |
| 806 | { |
| 807 | struct create_lease *buf; |
| 808 | |
Dia Vasile | d455b72 | 2013-03-10 14:29:04 +0200 | [diff] [blame] | 809 | buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 810 | if (!buf) |
| 811 | return NULL; |
| 812 | |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 813 | buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key)); |
| 814 | buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8))); |
| 815 | if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) |
| 816 | buf->lcontext.LeaseState = SMB2_LEASE_WRITE_CACHING | |
| 817 | SMB2_LEASE_READ_CACHING; |
| 818 | else if (oplock == SMB2_OPLOCK_LEVEL_II) |
| 819 | buf->lcontext.LeaseState = SMB2_LEASE_READ_CACHING; |
| 820 | else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) |
| 821 | buf->lcontext.LeaseState = SMB2_LEASE_HANDLE_CACHING | |
| 822 | SMB2_LEASE_READ_CACHING | |
| 823 | SMB2_LEASE_WRITE_CACHING; |
| 824 | |
| 825 | buf->ccontext.DataOffset = cpu_to_le16(offsetof |
| 826 | (struct create_lease, lcontext)); |
| 827 | buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); |
| 828 | buf->ccontext.NameOffset = cpu_to_le16(offsetof |
| 829 | (struct create_lease, Name)); |
| 830 | buf->ccontext.NameLength = cpu_to_le16(4); |
| 831 | buf->Name[0] = 'R'; |
| 832 | buf->Name[1] = 'q'; |
| 833 | buf->Name[2] = 'L'; |
| 834 | buf->Name[3] = 's'; |
| 835 | return buf; |
| 836 | } |
| 837 | |
| 838 | static __u8 |
| 839 | parse_lease_state(struct smb2_create_rsp *rsp) |
| 840 | { |
| 841 | char *data_offset; |
| 842 | struct create_lease *lc; |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 843 | bool found = false; |
| 844 | |
| 845 | data_offset = (char *)rsp; |
| 846 | data_offset += 4 + le32_to_cpu(rsp->CreateContextsOffset); |
| 847 | lc = (struct create_lease *)data_offset; |
| 848 | do { |
| 849 | char *name = le16_to_cpu(lc->ccontext.NameOffset) + (char *)lc; |
| 850 | if (le16_to_cpu(lc->ccontext.NameLength) != 4 || |
| 851 | strncmp(name, "RqLs", 4)) { |
| 852 | lc = (struct create_lease *)((char *)lc |
| 853 | + le32_to_cpu(lc->ccontext.Next)); |
| 854 | continue; |
| 855 | } |
| 856 | if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS) |
| 857 | return SMB2_OPLOCK_LEVEL_NOCHANGE; |
| 858 | found = true; |
| 859 | break; |
| 860 | } while (le32_to_cpu(lc->ccontext.Next) != 0); |
| 861 | |
| 862 | if (!found) |
Pavel Shilovsky | 0822f51 | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 863 | return 0; |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 864 | |
Pavel Shilovsky | 0822f51 | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 865 | return smb2_map_lease_to_oplock(lc->lcontext.LeaseState); |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 866 | } |
| 867 | |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 868 | int |
| 869 | SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, |
| 870 | u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access, |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 871 | __u32 create_disposition, __u32 file_attributes, __u32 create_options, |
Pavel Shilovsky | 2e44b28 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 872 | __u8 *oplock, struct smb2_file_all_info *buf) |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 873 | { |
| 874 | struct smb2_create_req *req; |
| 875 | struct smb2_create_rsp *rsp; |
| 876 | struct TCP_Server_Info *server; |
| 877 | struct cifs_ses *ses = tcon->ses; |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 878 | struct kvec iov[3]; |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 879 | int resp_buftype; |
| 880 | int uni_path_len; |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 881 | __le16 *copy_path = NULL; |
| 882 | int copy_size; |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 883 | int rc = 0; |
| 884 | int num_iovecs = 2; |
| 885 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 886 | cifs_dbg(FYI, "create/open\n"); |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 887 | |
| 888 | if (ses && (ses->server)) |
| 889 | server = ses->server; |
| 890 | else |
| 891 | return -EIO; |
| 892 | |
| 893 | rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req); |
| 894 | if (rc) |
| 895 | return rc; |
| 896 | |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 897 | req->ImpersonationLevel = IL_IMPERSONATION; |
| 898 | req->DesiredAccess = cpu_to_le32(desired_access); |
| 899 | /* File attributes ignored on open (used in create though) */ |
| 900 | req->FileAttributes = cpu_to_le32(file_attributes); |
| 901 | req->ShareAccess = FILE_SHARE_ALL_LE; |
| 902 | req->CreateDisposition = cpu_to_le32(create_disposition); |
| 903 | req->CreateOptions = cpu_to_le32(create_options); |
| 904 | uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; |
| 905 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 906 | - 8 /* pad */ - 4 /* do not count rfc1001 len field */); |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 907 | |
| 908 | iov[0].iov_base = (char *)req; |
| 909 | /* 4 for rfc1002 length field */ |
| 910 | iov[0].iov_len = get_rfc1002_length(req) + 4; |
| 911 | |
| 912 | /* MUST set path len (NameLength) to 0 opening root of share */ |
| 913 | if (uni_path_len >= 4) { |
| 914 | req->NameLength = cpu_to_le16(uni_path_len - 2); |
| 915 | /* -1 since last byte is buf[0] which is sent below (path) */ |
| 916 | iov[0].iov_len--; |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 917 | if (uni_path_len % 8 != 0) { |
| 918 | copy_size = uni_path_len / 8 * 8; |
| 919 | if (copy_size < uni_path_len) |
| 920 | copy_size += 8; |
| 921 | |
| 922 | copy_path = kzalloc(copy_size, GFP_KERNEL); |
| 923 | if (!copy_path) |
| 924 | return -ENOMEM; |
| 925 | memcpy((char *)copy_path, (const char *)path, |
| 926 | uni_path_len); |
| 927 | uni_path_len = copy_size; |
| 928 | path = copy_path; |
| 929 | } |
| 930 | |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 931 | iov[1].iov_len = uni_path_len; |
| 932 | iov[1].iov_base = path; |
| 933 | /* |
| 934 | * -1 since last byte is buf[0] which was counted in |
| 935 | * smb2_buf_len. |
| 936 | */ |
| 937 | inc_rfc1001_len(req, uni_path_len - 1); |
| 938 | } else { |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 939 | iov[0].iov_len += 7; |
| 940 | req->hdr.smb2_buf_length = cpu_to_be32(be32_to_cpu( |
| 941 | req->hdr.smb2_buf_length) + 8 - 1); |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 942 | num_iovecs = 1; |
| 943 | req->NameLength = 0; |
| 944 | } |
| 945 | |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 946 | if (!server->oplocks) |
| 947 | *oplock = SMB2_OPLOCK_LEVEL_NONE; |
| 948 | |
| 949 | if (!(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) || |
| 950 | *oplock == SMB2_OPLOCK_LEVEL_NONE) |
| 951 | req->RequestedOplockLevel = *oplock; |
| 952 | else { |
| 953 | iov[num_iovecs].iov_base = create_lease_buf(oplock+1, *oplock); |
| 954 | if (iov[num_iovecs].iov_base == NULL) { |
| 955 | cifs_small_buf_release(req); |
| 956 | kfree(copy_path); |
| 957 | return -ENOMEM; |
| 958 | } |
| 959 | iov[num_iovecs].iov_len = sizeof(struct create_lease); |
| 960 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; |
| 961 | req->CreateContextsOffset = cpu_to_le32( |
| 962 | sizeof(struct smb2_create_req) - 4 - 8 + |
| 963 | iov[num_iovecs-1].iov_len); |
| 964 | req->CreateContextsLength = cpu_to_le32( |
| 965 | sizeof(struct create_lease)); |
| 966 | inc_rfc1001_len(&req->hdr, sizeof(struct create_lease)); |
| 967 | num_iovecs++; |
| 968 | } |
| 969 | |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 970 | rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); |
| 971 | rsp = (struct smb2_create_rsp *)iov[0].iov_base; |
| 972 | |
| 973 | if (rc != 0) { |
| 974 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); |
| 975 | goto creat_exit; |
| 976 | } |
| 977 | |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 978 | *persistent_fid = rsp->PersistentFileId; |
| 979 | *volatile_fid = rsp->VolatileFileId; |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 980 | |
| 981 | if (buf) { |
| 982 | memcpy(buf, &rsp->CreationTime, 32); |
| 983 | buf->AllocationSize = rsp->AllocationSize; |
| 984 | buf->EndOfFile = rsp->EndofFile; |
| 985 | buf->Attributes = rsp->FileAttributes; |
| 986 | buf->NumberOfLinks = cpu_to_le32(1); |
| 987 | buf->DeletePending = 0; |
| 988 | } |
Pavel Shilovsky | 2e44b28 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 989 | |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 990 | if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) |
| 991 | *oplock = parse_lease_state(rsp); |
| 992 | else |
| 993 | *oplock = rsp->OplockLevel; |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 994 | creat_exit: |
Pavel Shilovsky | b8c32db | 2012-09-19 06:22:44 -0700 | [diff] [blame] | 995 | kfree(copy_path); |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 996 | free_rsp_buf(resp_buftype, rsp); |
| 997 | return rc; |
| 998 | } |
| 999 | |
| 1000 | int |
| 1001 | SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, |
| 1002 | u64 persistent_fid, u64 volatile_fid) |
| 1003 | { |
| 1004 | struct smb2_close_req *req; |
| 1005 | struct smb2_close_rsp *rsp; |
| 1006 | struct TCP_Server_Info *server; |
| 1007 | struct cifs_ses *ses = tcon->ses; |
| 1008 | struct kvec iov[1]; |
| 1009 | int resp_buftype; |
| 1010 | int rc = 0; |
| 1011 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1012 | cifs_dbg(FYI, "Close\n"); |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 1013 | |
| 1014 | if (ses && (ses->server)) |
| 1015 | server = ses->server; |
| 1016 | else |
| 1017 | return -EIO; |
| 1018 | |
| 1019 | rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req); |
| 1020 | if (rc) |
| 1021 | return rc; |
| 1022 | |
| 1023 | req->PersistentFileId = persistent_fid; |
| 1024 | req->VolatileFileId = volatile_fid; |
| 1025 | |
| 1026 | iov[0].iov_base = (char *)req; |
| 1027 | /* 4 for rfc1002 length field */ |
| 1028 | iov[0].iov_len = get_rfc1002_length(req) + 4; |
| 1029 | |
| 1030 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); |
| 1031 | rsp = (struct smb2_close_rsp *)iov[0].iov_base; |
| 1032 | |
| 1033 | if (rc != 0) { |
| 1034 | if (tcon) |
| 1035 | cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); |
| 1036 | goto close_exit; |
| 1037 | } |
| 1038 | |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 1039 | /* BB FIXME - decode close response, update inode for caching */ |
| 1040 | |
| 1041 | close_exit: |
| 1042 | free_rsp_buf(resp_buftype, rsp); |
| 1043 | return rc; |
| 1044 | } |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1045 | |
| 1046 | static int |
| 1047 | validate_buf(unsigned int offset, unsigned int buffer_length, |
| 1048 | struct smb2_hdr *hdr, unsigned int min_buf_size) |
| 1049 | |
| 1050 | { |
| 1051 | unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length); |
| 1052 | char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr; |
| 1053 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; |
| 1054 | char *end_of_buf = begin_of_buf + buffer_length; |
| 1055 | |
| 1056 | |
| 1057 | if (buffer_length < min_buf_size) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1058 | cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", |
| 1059 | buffer_length, min_buf_size); |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1060 | return -EINVAL; |
| 1061 | } |
| 1062 | |
| 1063 | /* check if beyond RFC1001 maximum length */ |
| 1064 | if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1065 | cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", |
| 1066 | buffer_length, smb_len); |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1067 | return -EINVAL; |
| 1068 | } |
| 1069 | |
| 1070 | if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1071 | cifs_dbg(VFS, "illegal server response, bad offset to data\n"); |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1072 | return -EINVAL; |
| 1073 | } |
| 1074 | |
| 1075 | return 0; |
| 1076 | } |
| 1077 | |
| 1078 | /* |
| 1079 | * If SMB buffer fields are valid, copy into temporary buffer to hold result. |
| 1080 | * Caller must free buffer. |
| 1081 | */ |
| 1082 | static int |
| 1083 | validate_and_copy_buf(unsigned int offset, unsigned int buffer_length, |
| 1084 | struct smb2_hdr *hdr, unsigned int minbufsize, |
| 1085 | char *data) |
| 1086 | |
| 1087 | { |
| 1088 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; |
| 1089 | int rc; |
| 1090 | |
| 1091 | if (!data) |
| 1092 | return -EINVAL; |
| 1093 | |
| 1094 | rc = validate_buf(offset, buffer_length, hdr, minbufsize); |
| 1095 | if (rc) |
| 1096 | return rc; |
| 1097 | |
| 1098 | memcpy(data, begin_of_buf, buffer_length); |
| 1099 | |
| 1100 | return 0; |
| 1101 | } |
| 1102 | |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 1103 | static int |
| 1104 | query_info(const unsigned int xid, struct cifs_tcon *tcon, |
| 1105 | u64 persistent_fid, u64 volatile_fid, u8 info_class, |
| 1106 | size_t output_len, size_t min_len, void *data) |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1107 | { |
| 1108 | struct smb2_query_info_req *req; |
| 1109 | struct smb2_query_info_rsp *rsp = NULL; |
| 1110 | struct kvec iov[2]; |
| 1111 | int rc = 0; |
| 1112 | int resp_buftype; |
| 1113 | struct TCP_Server_Info *server; |
| 1114 | struct cifs_ses *ses = tcon->ses; |
| 1115 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1116 | cifs_dbg(FYI, "Query Info\n"); |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1117 | |
| 1118 | if (ses && (ses->server)) |
| 1119 | server = ses->server; |
| 1120 | else |
| 1121 | return -EIO; |
| 1122 | |
| 1123 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); |
| 1124 | if (rc) |
| 1125 | return rc; |
| 1126 | |
| 1127 | req->InfoType = SMB2_O_INFO_FILE; |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 1128 | req->FileInfoClass = info_class; |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1129 | req->PersistentFileId = persistent_fid; |
| 1130 | req->VolatileFileId = volatile_fid; |
| 1131 | /* 4 for rfc1002 length field and 1 for Buffer */ |
| 1132 | req->InputBufferOffset = |
| 1133 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 1134 | req->OutputBufferLength = cpu_to_le32(output_len); |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1135 | |
| 1136 | iov[0].iov_base = (char *)req; |
| 1137 | /* 4 for rfc1002 length field */ |
| 1138 | iov[0].iov_len = get_rfc1002_length(req) + 4; |
| 1139 | |
| 1140 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); |
Pavel Shilovsky | e5d0488 | 2012-09-19 16:03:26 +0400 | [diff] [blame] | 1141 | rsp = (struct smb2_query_info_rsp *)iov[0].iov_base; |
| 1142 | |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1143 | if (rc) { |
| 1144 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); |
| 1145 | goto qinf_exit; |
| 1146 | } |
| 1147 | |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1148 | rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset), |
| 1149 | le32_to_cpu(rsp->OutputBufferLength), |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 1150 | &rsp->hdr, min_len, data); |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1151 | |
| 1152 | qinf_exit: |
| 1153 | free_rsp_buf(resp_buftype, rsp); |
| 1154 | return rc; |
| 1155 | } |
Pavel Shilovsky | 9094fad | 2012-07-12 18:30:44 +0400 | [diff] [blame] | 1156 | |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 1157 | int |
| 1158 | SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, |
| 1159 | u64 persistent_fid, u64 volatile_fid, |
| 1160 | struct smb2_file_all_info *data) |
| 1161 | { |
| 1162 | return query_info(xid, tcon, persistent_fid, volatile_fid, |
| 1163 | FILE_ALL_INFORMATION, |
| 1164 | sizeof(struct smb2_file_all_info) + MAX_NAME * 2, |
| 1165 | sizeof(struct smb2_file_all_info), data); |
| 1166 | } |
| 1167 | |
| 1168 | int |
| 1169 | SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, |
| 1170 | u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) |
| 1171 | { |
| 1172 | return query_info(xid, tcon, persistent_fid, volatile_fid, |
| 1173 | FILE_INTERNAL_INFORMATION, |
| 1174 | sizeof(struct smb2_file_internal_info), |
| 1175 | sizeof(struct smb2_file_internal_info), uniqueid); |
| 1176 | } |
| 1177 | |
Pavel Shilovsky | 9094fad | 2012-07-12 18:30:44 +0400 | [diff] [blame] | 1178 | /* |
| 1179 | * This is a no-op for now. We're not really interested in the reply, but |
| 1180 | * rather in the fact that the server sent one and that server->lstrp |
| 1181 | * gets updated. |
| 1182 | * |
| 1183 | * FIXME: maybe we should consider checking that the reply matches request? |
| 1184 | */ |
| 1185 | static void |
| 1186 | smb2_echo_callback(struct mid_q_entry *mid) |
| 1187 | { |
| 1188 | struct TCP_Server_Info *server = mid->callback_data; |
| 1189 | struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf; |
| 1190 | unsigned int credits_received = 1; |
| 1191 | |
| 1192 | if (mid->mid_state == MID_RESPONSE_RECEIVED) |
| 1193 | credits_received = le16_to_cpu(smb2->hdr.CreditRequest); |
| 1194 | |
| 1195 | DeleteMidQEntry(mid); |
| 1196 | add_credits(server, credits_received, CIFS_ECHO_OP); |
| 1197 | } |
| 1198 | |
| 1199 | int |
| 1200 | SMB2_echo(struct TCP_Server_Info *server) |
| 1201 | { |
| 1202 | struct smb2_echo_req *req; |
| 1203 | int rc = 0; |
| 1204 | struct kvec iov; |
Jeff Layton | fec344e | 2012-09-18 16:20:35 -0700 | [diff] [blame] | 1205 | struct smb_rqst rqst = { .rq_iov = &iov, |
| 1206 | .rq_nvec = 1 }; |
Pavel Shilovsky | 9094fad | 2012-07-12 18:30:44 +0400 | [diff] [blame] | 1207 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1208 | cifs_dbg(FYI, "In echo request\n"); |
Pavel Shilovsky | 9094fad | 2012-07-12 18:30:44 +0400 | [diff] [blame] | 1209 | |
| 1210 | rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req); |
| 1211 | if (rc) |
| 1212 | return rc; |
| 1213 | |
| 1214 | req->hdr.CreditRequest = cpu_to_le16(1); |
| 1215 | |
| 1216 | iov.iov_base = (char *)req; |
| 1217 | /* 4 for rfc1002 length field */ |
| 1218 | iov.iov_len = get_rfc1002_length(req) + 4; |
| 1219 | |
Jeff Layton | fec344e | 2012-09-18 16:20:35 -0700 | [diff] [blame] | 1220 | rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server, |
Pavel Shilovsky | 9094fad | 2012-07-12 18:30:44 +0400 | [diff] [blame] | 1221 | CIFS_ECHO_OP); |
| 1222 | if (rc) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1223 | cifs_dbg(FYI, "Echo request failed: %d\n", rc); |
Pavel Shilovsky | 9094fad | 2012-07-12 18:30:44 +0400 | [diff] [blame] | 1224 | |
| 1225 | cifs_small_buf_release(req); |
| 1226 | return rc; |
| 1227 | } |
Pavel Shilovsky | 7a5cfb1 | 2012-09-18 16:20:28 -0700 | [diff] [blame] | 1228 | |
| 1229 | int |
| 1230 | SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, |
| 1231 | u64 volatile_fid) |
| 1232 | { |
| 1233 | struct smb2_flush_req *req; |
| 1234 | struct TCP_Server_Info *server; |
| 1235 | struct cifs_ses *ses = tcon->ses; |
| 1236 | struct kvec iov[1]; |
| 1237 | int resp_buftype; |
| 1238 | int rc = 0; |
| 1239 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1240 | cifs_dbg(FYI, "Flush\n"); |
Pavel Shilovsky | 7a5cfb1 | 2012-09-18 16:20:28 -0700 | [diff] [blame] | 1241 | |
| 1242 | if (ses && (ses->server)) |
| 1243 | server = ses->server; |
| 1244 | else |
| 1245 | return -EIO; |
| 1246 | |
| 1247 | rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req); |
| 1248 | if (rc) |
| 1249 | return rc; |
| 1250 | |
| 1251 | req->PersistentFileId = persistent_fid; |
| 1252 | req->VolatileFileId = volatile_fid; |
| 1253 | |
| 1254 | iov[0].iov_base = (char *)req; |
| 1255 | /* 4 for rfc1002 length field */ |
| 1256 | iov[0].iov_len = get_rfc1002_length(req) + 4; |
| 1257 | |
| 1258 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); |
| 1259 | |
| 1260 | if ((rc != 0) && tcon) |
| 1261 | cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); |
| 1262 | |
| 1263 | free_rsp_buf(resp_buftype, iov[0].iov_base); |
| 1264 | return rc; |
| 1265 | } |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1266 | |
| 1267 | /* |
| 1268 | * To form a chain of read requests, any read requests after the first should |
| 1269 | * have the end_of_chain boolean set to true. |
| 1270 | */ |
| 1271 | static int |
| 1272 | smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms, |
| 1273 | unsigned int remaining_bytes, int request_type) |
| 1274 | { |
| 1275 | int rc = -EACCES; |
| 1276 | struct smb2_read_req *req = NULL; |
| 1277 | |
| 1278 | rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req); |
| 1279 | if (rc) |
| 1280 | return rc; |
| 1281 | if (io_parms->tcon->ses->server == NULL) |
| 1282 | return -ECONNABORTED; |
| 1283 | |
| 1284 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); |
| 1285 | |
| 1286 | req->PersistentFileId = io_parms->persistent_fid; |
| 1287 | req->VolatileFileId = io_parms->volatile_fid; |
| 1288 | req->ReadChannelInfoOffset = 0; /* reserved */ |
| 1289 | req->ReadChannelInfoLength = 0; /* reserved */ |
| 1290 | req->Channel = 0; /* reserved */ |
| 1291 | req->MinimumCount = 0; |
| 1292 | req->Length = cpu_to_le32(io_parms->length); |
| 1293 | req->Offset = cpu_to_le64(io_parms->offset); |
| 1294 | |
| 1295 | if (request_type & CHAINED_REQUEST) { |
| 1296 | if (!(request_type & END_OF_CHAIN)) { |
| 1297 | /* 4 for rfc1002 length field */ |
| 1298 | req->hdr.NextCommand = |
| 1299 | cpu_to_le32(get_rfc1002_length(req) + 4); |
| 1300 | } else /* END_OF_CHAIN */ |
| 1301 | req->hdr.NextCommand = 0; |
| 1302 | if (request_type & RELATED_REQUEST) { |
| 1303 | req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS; |
| 1304 | /* |
| 1305 | * Related requests use info from previous read request |
| 1306 | * in chain. |
| 1307 | */ |
| 1308 | req->hdr.SessionId = 0xFFFFFFFF; |
| 1309 | req->hdr.TreeId = 0xFFFFFFFF; |
| 1310 | req->PersistentFileId = 0xFFFFFFFF; |
| 1311 | req->VolatileFileId = 0xFFFFFFFF; |
| 1312 | } |
| 1313 | } |
| 1314 | if (remaining_bytes > io_parms->length) |
| 1315 | req->RemainingBytes = cpu_to_le32(remaining_bytes); |
| 1316 | else |
| 1317 | req->RemainingBytes = 0; |
| 1318 | |
| 1319 | iov[0].iov_base = (char *)req; |
| 1320 | /* 4 for rfc1002 length field */ |
| 1321 | iov[0].iov_len = get_rfc1002_length(req) + 4; |
| 1322 | return rc; |
| 1323 | } |
| 1324 | |
| 1325 | static void |
| 1326 | smb2_readv_callback(struct mid_q_entry *mid) |
| 1327 | { |
| 1328 | struct cifs_readdata *rdata = mid->callback_data; |
| 1329 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); |
| 1330 | struct TCP_Server_Info *server = tcon->ses->server; |
Jeff Layton | 5819575 | 2012-09-19 06:22:34 -0700 | [diff] [blame] | 1331 | struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base; |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1332 | unsigned int credits_received = 1; |
Jeff Layton | 5819575 | 2012-09-19 06:22:34 -0700 | [diff] [blame] | 1333 | struct smb_rqst rqst = { .rq_iov = &rdata->iov, |
Jeff Layton | 8321fec | 2012-09-19 06:22:32 -0700 | [diff] [blame] | 1334 | .rq_nvec = 1, |
| 1335 | .rq_pages = rdata->pages, |
| 1336 | .rq_npages = rdata->nr_pages, |
| 1337 | .rq_pagesz = rdata->pagesz, |
| 1338 | .rq_tailsz = rdata->tailsz }; |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1339 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1340 | cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", |
| 1341 | __func__, mid->mid, mid->mid_state, rdata->result, |
| 1342 | rdata->bytes); |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1343 | |
| 1344 | switch (mid->mid_state) { |
| 1345 | case MID_RESPONSE_RECEIVED: |
| 1346 | credits_received = le16_to_cpu(buf->CreditRequest); |
| 1347 | /* result already set, check signature */ |
Jeff Layton | 38d77c5 | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 1348 | if (server->sign) { |
Pavel Shilovsky | 3c1bf7e | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 1349 | int rc; |
| 1350 | |
Jeff Layton | 0b688cf | 2012-09-18 16:20:34 -0700 | [diff] [blame] | 1351 | rc = smb2_verify_signature(&rqst, server); |
Pavel Shilovsky | 3c1bf7e | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 1352 | if (rc) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1353 | cifs_dbg(VFS, "SMB signature verification returned error = %d\n", |
| 1354 | rc); |
Pavel Shilovsky | 3c1bf7e | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 1355 | } |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1356 | /* FIXME: should this be counted toward the initiating task? */ |
| 1357 | task_io_account_read(rdata->bytes); |
| 1358 | cifs_stats_bytes_read(tcon, rdata->bytes); |
| 1359 | break; |
| 1360 | case MID_REQUEST_SUBMITTED: |
| 1361 | case MID_RETRY_NEEDED: |
| 1362 | rdata->result = -EAGAIN; |
| 1363 | break; |
| 1364 | default: |
| 1365 | if (rdata->result != -ENODATA) |
| 1366 | rdata->result = -EIO; |
| 1367 | } |
| 1368 | |
| 1369 | if (rdata->result) |
| 1370 | cifs_stats_fail_inc(tcon, SMB2_READ_HE); |
| 1371 | |
| 1372 | queue_work(cifsiod_wq, &rdata->work); |
| 1373 | DeleteMidQEntry(mid); |
| 1374 | add_credits(server, credits_received, 0); |
| 1375 | } |
| 1376 | |
| 1377 | /* smb2_async_readv - send an async write, and set up mid to handle result */ |
| 1378 | int |
| 1379 | smb2_async_readv(struct cifs_readdata *rdata) |
| 1380 | { |
| 1381 | int rc; |
| 1382 | struct smb2_hdr *buf; |
| 1383 | struct cifs_io_parms io_parms; |
Jeff Layton | 5819575 | 2012-09-19 06:22:34 -0700 | [diff] [blame] | 1384 | struct smb_rqst rqst = { .rq_iov = &rdata->iov, |
Jeff Layton | fec344e | 2012-09-18 16:20:35 -0700 | [diff] [blame] | 1385 | .rq_nvec = 1 }; |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1386 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1387 | cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", |
| 1388 | __func__, rdata->offset, rdata->bytes); |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1389 | |
| 1390 | io_parms.tcon = tlink_tcon(rdata->cfile->tlink); |
| 1391 | io_parms.offset = rdata->offset; |
| 1392 | io_parms.length = rdata->bytes; |
| 1393 | io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; |
| 1394 | io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; |
| 1395 | io_parms.pid = rdata->pid; |
Jeff Layton | 5819575 | 2012-09-19 06:22:34 -0700 | [diff] [blame] | 1396 | rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0); |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1397 | if (rc) |
| 1398 | return rc; |
| 1399 | |
Jeff Layton | 5819575 | 2012-09-19 06:22:34 -0700 | [diff] [blame] | 1400 | buf = (struct smb2_hdr *)rdata->iov.iov_base; |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1401 | /* 4 for rfc1002 length field */ |
Jeff Layton | 5819575 | 2012-09-19 06:22:34 -0700 | [diff] [blame] | 1402 | rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4; |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1403 | |
| 1404 | kref_get(&rdata->refcount); |
Jeff Layton | fec344e | 2012-09-18 16:20:35 -0700 | [diff] [blame] | 1405 | rc = cifs_call_async(io_parms.tcon->ses->server, &rqst, |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1406 | cifs_readv_receive, smb2_readv_callback, |
| 1407 | rdata, 0); |
Pavel Shilovsky | e5d0488 | 2012-09-19 16:03:26 +0400 | [diff] [blame] | 1408 | if (rc) { |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1409 | kref_put(&rdata->refcount, cifs_readdata_release); |
Pavel Shilovsky | e5d0488 | 2012-09-19 16:03:26 +0400 | [diff] [blame] | 1410 | cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); |
| 1411 | } |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1412 | |
| 1413 | cifs_small_buf_release(buf); |
| 1414 | return rc; |
| 1415 | } |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1416 | |
Pavel Shilovsky | d8e0503 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 1417 | int |
| 1418 | SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, |
| 1419 | unsigned int *nbytes, char **buf, int *buf_type) |
| 1420 | { |
| 1421 | int resp_buftype, rc = -EACCES; |
| 1422 | struct smb2_read_rsp *rsp = NULL; |
| 1423 | struct kvec iov[1]; |
| 1424 | |
| 1425 | *nbytes = 0; |
| 1426 | rc = smb2_new_read_req(iov, io_parms, 0, 0); |
| 1427 | if (rc) |
| 1428 | return rc; |
| 1429 | |
| 1430 | rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1, |
| 1431 | &resp_buftype, CIFS_LOG_ERROR); |
| 1432 | |
| 1433 | rsp = (struct smb2_read_rsp *)iov[0].iov_base; |
| 1434 | |
| 1435 | if (rsp->hdr.Status == STATUS_END_OF_FILE) { |
| 1436 | free_rsp_buf(resp_buftype, iov[0].iov_base); |
| 1437 | return 0; |
| 1438 | } |
| 1439 | |
| 1440 | if (rc) { |
| 1441 | cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1442 | cifs_dbg(VFS, "Send error in read = %d\n", rc); |
Pavel Shilovsky | d8e0503 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 1443 | } else { |
| 1444 | *nbytes = le32_to_cpu(rsp->DataLength); |
| 1445 | if ((*nbytes > CIFS_MAX_MSGSIZE) || |
| 1446 | (*nbytes > io_parms->length)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1447 | cifs_dbg(FYI, "bad length %d for count %d\n", |
| 1448 | *nbytes, io_parms->length); |
Pavel Shilovsky | d8e0503 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 1449 | rc = -EIO; |
| 1450 | *nbytes = 0; |
| 1451 | } |
| 1452 | } |
| 1453 | |
| 1454 | if (*buf) { |
| 1455 | memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset, |
| 1456 | *nbytes); |
| 1457 | free_rsp_buf(resp_buftype, iov[0].iov_base); |
| 1458 | } else if (resp_buftype != CIFS_NO_BUFFER) { |
| 1459 | *buf = iov[0].iov_base; |
| 1460 | if (resp_buftype == CIFS_SMALL_BUFFER) |
| 1461 | *buf_type = CIFS_SMALL_BUFFER; |
| 1462 | else if (resp_buftype == CIFS_LARGE_BUFFER) |
| 1463 | *buf_type = CIFS_LARGE_BUFFER; |
| 1464 | } |
| 1465 | return rc; |
| 1466 | } |
| 1467 | |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1468 | /* |
| 1469 | * Check the mid_state and signature on received buffer (if any), and queue the |
| 1470 | * workqueue completion task. |
| 1471 | */ |
| 1472 | static void |
| 1473 | smb2_writev_callback(struct mid_q_entry *mid) |
| 1474 | { |
| 1475 | struct cifs_writedata *wdata = mid->callback_data; |
| 1476 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); |
| 1477 | unsigned int written; |
| 1478 | struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; |
| 1479 | unsigned int credits_received = 1; |
| 1480 | |
| 1481 | switch (mid->mid_state) { |
| 1482 | case MID_RESPONSE_RECEIVED: |
| 1483 | credits_received = le16_to_cpu(rsp->hdr.CreditRequest); |
| 1484 | wdata->result = smb2_check_receive(mid, tcon->ses->server, 0); |
| 1485 | if (wdata->result != 0) |
| 1486 | break; |
| 1487 | |
| 1488 | written = le32_to_cpu(rsp->DataLength); |
| 1489 | /* |
| 1490 | * Mask off high 16 bits when bytes written as returned |
| 1491 | * by the server is greater than bytes requested by the |
| 1492 | * client. OS/2 servers are known to set incorrect |
| 1493 | * CountHigh values. |
| 1494 | */ |
| 1495 | if (written > wdata->bytes) |
| 1496 | written &= 0xFFFF; |
| 1497 | |
| 1498 | if (written < wdata->bytes) |
| 1499 | wdata->result = -ENOSPC; |
| 1500 | else |
| 1501 | wdata->bytes = written; |
| 1502 | break; |
| 1503 | case MID_REQUEST_SUBMITTED: |
| 1504 | case MID_RETRY_NEEDED: |
| 1505 | wdata->result = -EAGAIN; |
| 1506 | break; |
| 1507 | default: |
| 1508 | wdata->result = -EIO; |
| 1509 | break; |
| 1510 | } |
| 1511 | |
| 1512 | if (wdata->result) |
| 1513 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
| 1514 | |
| 1515 | queue_work(cifsiod_wq, &wdata->work); |
| 1516 | DeleteMidQEntry(mid); |
| 1517 | add_credits(tcon->ses->server, credits_received, 0); |
| 1518 | } |
| 1519 | |
| 1520 | /* smb2_async_writev - send an async write, and set up mid to handle result */ |
| 1521 | int |
| 1522 | smb2_async_writev(struct cifs_writedata *wdata) |
| 1523 | { |
Jeff Layton | eddb079 | 2012-09-18 16:20:35 -0700 | [diff] [blame] | 1524 | int rc = -EACCES; |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1525 | struct smb2_write_req *req = NULL; |
| 1526 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); |
Jeff Layton | eddb079 | 2012-09-18 16:20:35 -0700 | [diff] [blame] | 1527 | struct kvec iov; |
Jeff Layton | fec344e | 2012-09-18 16:20:35 -0700 | [diff] [blame] | 1528 | struct smb_rqst rqst; |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1529 | |
| 1530 | rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req); |
| 1531 | if (rc) |
| 1532 | goto async_writev_out; |
| 1533 | |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1534 | req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid); |
| 1535 | |
| 1536 | req->PersistentFileId = wdata->cfile->fid.persistent_fid; |
| 1537 | req->VolatileFileId = wdata->cfile->fid.volatile_fid; |
| 1538 | req->WriteChannelInfoOffset = 0; |
| 1539 | req->WriteChannelInfoLength = 0; |
| 1540 | req->Channel = 0; |
| 1541 | req->Offset = cpu_to_le64(wdata->offset); |
| 1542 | /* 4 for rfc1002 length field */ |
| 1543 | req->DataOffset = cpu_to_le16( |
| 1544 | offsetof(struct smb2_write_req, Buffer) - 4); |
| 1545 | req->RemainingBytes = 0; |
| 1546 | |
| 1547 | /* 4 for rfc1002 length field and 1 for Buffer */ |
Jeff Layton | eddb079 | 2012-09-18 16:20:35 -0700 | [diff] [blame] | 1548 | iov.iov_len = get_rfc1002_length(req) + 4 - 1; |
| 1549 | iov.iov_base = req; |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1550 | |
Jeff Layton | eddb079 | 2012-09-18 16:20:35 -0700 | [diff] [blame] | 1551 | rqst.rq_iov = &iov; |
| 1552 | rqst.rq_nvec = 1; |
| 1553 | rqst.rq_pages = wdata->pages; |
| 1554 | rqst.rq_npages = wdata->nr_pages; |
| 1555 | rqst.rq_pagesz = wdata->pagesz; |
| 1556 | rqst.rq_tailsz = wdata->tailsz; |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1557 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1558 | cifs_dbg(FYI, "async write at %llu %u bytes\n", |
| 1559 | wdata->offset, wdata->bytes); |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1560 | |
| 1561 | req->Length = cpu_to_le32(wdata->bytes); |
| 1562 | |
| 1563 | inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */); |
| 1564 | |
| 1565 | kref_get(&wdata->refcount); |
Jeff Layton | fec344e | 2012-09-18 16:20:35 -0700 | [diff] [blame] | 1566 | rc = cifs_call_async(tcon->ses->server, &rqst, NULL, |
| 1567 | smb2_writev_callback, wdata, 0); |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1568 | |
Pavel Shilovsky | e5d0488 | 2012-09-19 16:03:26 +0400 | [diff] [blame] | 1569 | if (rc) { |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1570 | kref_put(&wdata->refcount, cifs_writedata_release); |
Pavel Shilovsky | e5d0488 | 2012-09-19 16:03:26 +0400 | [diff] [blame] | 1571 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
| 1572 | } |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1573 | |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1574 | async_writev_out: |
| 1575 | cifs_small_buf_release(req); |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1576 | return rc; |
| 1577 | } |
Pavel Shilovsky | 009d344 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 1578 | |
| 1579 | /* |
| 1580 | * SMB2_write function gets iov pointer to kvec array with n_vec as a length. |
| 1581 | * The length field from io_parms must be at least 1 and indicates a number of |
| 1582 | * elements with data to write that begins with position 1 in iov array. All |
| 1583 | * data length is specified by count. |
| 1584 | */ |
| 1585 | int |
| 1586 | SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, |
| 1587 | unsigned int *nbytes, struct kvec *iov, int n_vec) |
| 1588 | { |
| 1589 | int rc = 0; |
| 1590 | struct smb2_write_req *req = NULL; |
| 1591 | struct smb2_write_rsp *rsp = NULL; |
| 1592 | int resp_buftype; |
| 1593 | *nbytes = 0; |
| 1594 | |
| 1595 | if (n_vec < 1) |
| 1596 | return rc; |
| 1597 | |
| 1598 | rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req); |
| 1599 | if (rc) |
| 1600 | return rc; |
| 1601 | |
| 1602 | if (io_parms->tcon->ses->server == NULL) |
| 1603 | return -ECONNABORTED; |
| 1604 | |
| 1605 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); |
| 1606 | |
| 1607 | req->PersistentFileId = io_parms->persistent_fid; |
| 1608 | req->VolatileFileId = io_parms->volatile_fid; |
| 1609 | req->WriteChannelInfoOffset = 0; |
| 1610 | req->WriteChannelInfoLength = 0; |
| 1611 | req->Channel = 0; |
| 1612 | req->Length = cpu_to_le32(io_parms->length); |
| 1613 | req->Offset = cpu_to_le64(io_parms->offset); |
| 1614 | /* 4 for rfc1002 length field */ |
| 1615 | req->DataOffset = cpu_to_le16( |
| 1616 | offsetof(struct smb2_write_req, Buffer) - 4); |
| 1617 | req->RemainingBytes = 0; |
| 1618 | |
| 1619 | iov[0].iov_base = (char *)req; |
| 1620 | /* 4 for rfc1002 length field and 1 for Buffer */ |
| 1621 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; |
| 1622 | |
| 1623 | /* length of entire message including data to be written */ |
| 1624 | inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */); |
| 1625 | |
| 1626 | rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1, |
| 1627 | &resp_buftype, 0); |
Pavel Shilovsky | e5d0488 | 2012-09-19 16:03:26 +0400 | [diff] [blame] | 1628 | rsp = (struct smb2_write_rsp *)iov[0].iov_base; |
Pavel Shilovsky | 009d344 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 1629 | |
| 1630 | if (rc) { |
| 1631 | cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1632 | cifs_dbg(VFS, "Send error in write = %d\n", rc); |
Pavel Shilovsky | e5d0488 | 2012-09-19 16:03:26 +0400 | [diff] [blame] | 1633 | } else |
Pavel Shilovsky | 009d344 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 1634 | *nbytes = le32_to_cpu(rsp->DataLength); |
Pavel Shilovsky | e5d0488 | 2012-09-19 16:03:26 +0400 | [diff] [blame] | 1635 | |
| 1636 | free_rsp_buf(resp_buftype, rsp); |
Pavel Shilovsky | 009d344 | 2012-09-18 16:20:30 -0700 | [diff] [blame] | 1637 | return rc; |
| 1638 | } |
Pavel Shilovsky | 35143eb | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 1639 | |
Pavel Shilovsky | d324f08d | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 1640 | static unsigned int |
| 1641 | num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size) |
| 1642 | { |
| 1643 | int len; |
| 1644 | unsigned int entrycount = 0; |
| 1645 | unsigned int next_offset = 0; |
| 1646 | FILE_DIRECTORY_INFO *entryptr; |
| 1647 | |
| 1648 | if (bufstart == NULL) |
| 1649 | return 0; |
| 1650 | |
| 1651 | entryptr = (FILE_DIRECTORY_INFO *)bufstart; |
| 1652 | |
| 1653 | while (1) { |
| 1654 | entryptr = (FILE_DIRECTORY_INFO *) |
| 1655 | ((char *)entryptr + next_offset); |
| 1656 | |
| 1657 | if ((char *)entryptr + size > end_of_buf) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1658 | cifs_dbg(VFS, "malformed search entry would overflow\n"); |
Pavel Shilovsky | d324f08d | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 1659 | break; |
| 1660 | } |
| 1661 | |
| 1662 | len = le32_to_cpu(entryptr->FileNameLength); |
| 1663 | if ((char *)entryptr + len + size > end_of_buf) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1664 | cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", |
| 1665 | end_of_buf); |
Pavel Shilovsky | d324f08d | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 1666 | break; |
| 1667 | } |
| 1668 | |
| 1669 | *lastentry = (char *)entryptr; |
| 1670 | entrycount++; |
| 1671 | |
| 1672 | next_offset = le32_to_cpu(entryptr->NextEntryOffset); |
| 1673 | if (!next_offset) |
| 1674 | break; |
| 1675 | } |
| 1676 | |
| 1677 | return entrycount; |
| 1678 | } |
| 1679 | |
| 1680 | /* |
| 1681 | * Readdir/FindFirst |
| 1682 | */ |
| 1683 | int |
| 1684 | SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, |
| 1685 | u64 persistent_fid, u64 volatile_fid, int index, |
| 1686 | struct cifs_search_info *srch_inf) |
| 1687 | { |
| 1688 | struct smb2_query_directory_req *req; |
| 1689 | struct smb2_query_directory_rsp *rsp = NULL; |
| 1690 | struct kvec iov[2]; |
| 1691 | int rc = 0; |
| 1692 | int len; |
| 1693 | int resp_buftype; |
| 1694 | unsigned char *bufptr; |
| 1695 | struct TCP_Server_Info *server; |
| 1696 | struct cifs_ses *ses = tcon->ses; |
| 1697 | __le16 asteriks = cpu_to_le16('*'); |
| 1698 | char *end_of_smb; |
| 1699 | unsigned int output_size = CIFSMaxBufSize; |
| 1700 | size_t info_buf_size; |
| 1701 | |
| 1702 | if (ses && (ses->server)) |
| 1703 | server = ses->server; |
| 1704 | else |
| 1705 | return -EIO; |
| 1706 | |
| 1707 | rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req); |
| 1708 | if (rc) |
| 1709 | return rc; |
| 1710 | |
| 1711 | switch (srch_inf->info_level) { |
| 1712 | case SMB_FIND_FILE_DIRECTORY_INFO: |
| 1713 | req->FileInformationClass = FILE_DIRECTORY_INFORMATION; |
| 1714 | info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; |
| 1715 | break; |
| 1716 | case SMB_FIND_FILE_ID_FULL_DIR_INFO: |
| 1717 | req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; |
| 1718 | info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; |
| 1719 | break; |
| 1720 | default: |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1721 | cifs_dbg(VFS, "info level %u isn't supported\n", |
| 1722 | srch_inf->info_level); |
Pavel Shilovsky | d324f08d | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 1723 | rc = -EINVAL; |
| 1724 | goto qdir_exit; |
| 1725 | } |
| 1726 | |
| 1727 | req->FileIndex = cpu_to_le32(index); |
| 1728 | req->PersistentFileId = persistent_fid; |
| 1729 | req->VolatileFileId = volatile_fid; |
| 1730 | |
| 1731 | len = 0x2; |
| 1732 | bufptr = req->Buffer; |
| 1733 | memcpy(bufptr, &asteriks, len); |
| 1734 | |
| 1735 | req->FileNameOffset = |
| 1736 | cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4); |
| 1737 | req->FileNameLength = cpu_to_le16(len); |
| 1738 | /* |
| 1739 | * BB could be 30 bytes or so longer if we used SMB2 specific |
| 1740 | * buffer lengths, but this is safe and close enough. |
| 1741 | */ |
| 1742 | output_size = min_t(unsigned int, output_size, server->maxBuf); |
| 1743 | output_size = min_t(unsigned int, output_size, 2 << 15); |
| 1744 | req->OutputBufferLength = cpu_to_le32(output_size); |
| 1745 | |
| 1746 | iov[0].iov_base = (char *)req; |
| 1747 | /* 4 for RFC1001 length and 1 for Buffer */ |
| 1748 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; |
| 1749 | |
| 1750 | iov[1].iov_base = (char *)(req->Buffer); |
| 1751 | iov[1].iov_len = len; |
| 1752 | |
| 1753 | inc_rfc1001_len(req, len - 1 /* Buffer */); |
| 1754 | |
| 1755 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); |
Pavel Shilovsky | e5d0488 | 2012-09-19 16:03:26 +0400 | [diff] [blame] | 1756 | rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base; |
| 1757 | |
Pavel Shilovsky | d324f08d | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 1758 | if (rc) { |
| 1759 | cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); |
| 1760 | goto qdir_exit; |
| 1761 | } |
Pavel Shilovsky | d324f08d | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 1762 | |
| 1763 | rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), |
| 1764 | le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, |
| 1765 | info_buf_size); |
| 1766 | if (rc) |
| 1767 | goto qdir_exit; |
| 1768 | |
| 1769 | srch_inf->unicode = true; |
| 1770 | |
| 1771 | if (srch_inf->ntwrk_buf_start) { |
| 1772 | if (srch_inf->smallBuf) |
| 1773 | cifs_small_buf_release(srch_inf->ntwrk_buf_start); |
| 1774 | else |
| 1775 | cifs_buf_release(srch_inf->ntwrk_buf_start); |
| 1776 | } |
| 1777 | srch_inf->ntwrk_buf_start = (char *)rsp; |
| 1778 | srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ + |
| 1779 | (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset); |
| 1780 | /* 4 for rfc1002 length field */ |
| 1781 | end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr; |
| 1782 | srch_inf->entries_in_buffer = |
| 1783 | num_entries(srch_inf->srch_entries_start, end_of_smb, |
| 1784 | &srch_inf->last_entry, info_buf_size); |
| 1785 | srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1786 | cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", |
| 1787 | srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, |
| 1788 | srch_inf->srch_entries_start, srch_inf->last_entry); |
Pavel Shilovsky | d324f08d | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 1789 | if (resp_buftype == CIFS_LARGE_BUFFER) |
| 1790 | srch_inf->smallBuf = false; |
| 1791 | else if (resp_buftype == CIFS_SMALL_BUFFER) |
| 1792 | srch_inf->smallBuf = true; |
| 1793 | else |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1794 | cifs_dbg(VFS, "illegal search buffer type\n"); |
Pavel Shilovsky | d324f08d | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 1795 | |
| 1796 | if (rsp->hdr.Status == STATUS_NO_MORE_FILES) |
| 1797 | srch_inf->endOfSearch = 1; |
| 1798 | else |
| 1799 | srch_inf->endOfSearch = 0; |
| 1800 | |
| 1801 | return rc; |
| 1802 | |
| 1803 | qdir_exit: |
| 1804 | free_rsp_buf(resp_buftype, rsp); |
| 1805 | return rc; |
| 1806 | } |
| 1807 | |
Pavel Shilovsky | 35143eb | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 1808 | static int |
| 1809 | send_set_info(const unsigned int xid, struct cifs_tcon *tcon, |
Pavel Shilovsky | c839ff2 | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 1810 | u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class, |
Pavel Shilovsky | 35143eb | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 1811 | unsigned int num, void **data, unsigned int *size) |
| 1812 | { |
| 1813 | struct smb2_set_info_req *req; |
| 1814 | struct smb2_set_info_rsp *rsp = NULL; |
| 1815 | struct kvec *iov; |
| 1816 | int rc = 0; |
| 1817 | int resp_buftype; |
| 1818 | unsigned int i; |
| 1819 | struct TCP_Server_Info *server; |
| 1820 | struct cifs_ses *ses = tcon->ses; |
| 1821 | |
| 1822 | if (ses && (ses->server)) |
| 1823 | server = ses->server; |
| 1824 | else |
| 1825 | return -EIO; |
| 1826 | |
| 1827 | if (!num) |
| 1828 | return -EINVAL; |
| 1829 | |
| 1830 | iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL); |
| 1831 | if (!iov) |
| 1832 | return -ENOMEM; |
| 1833 | |
| 1834 | rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req); |
| 1835 | if (rc) { |
| 1836 | kfree(iov); |
| 1837 | return rc; |
| 1838 | } |
| 1839 | |
Pavel Shilovsky | c839ff2 | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 1840 | req->hdr.ProcessId = cpu_to_le32(pid); |
| 1841 | |
Pavel Shilovsky | 35143eb | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 1842 | req->InfoType = SMB2_O_INFO_FILE; |
| 1843 | req->FileInfoClass = info_class; |
| 1844 | req->PersistentFileId = persistent_fid; |
| 1845 | req->VolatileFileId = volatile_fid; |
| 1846 | |
| 1847 | /* 4 for RFC1001 length and 1 for Buffer */ |
| 1848 | req->BufferOffset = |
| 1849 | cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4); |
| 1850 | req->BufferLength = cpu_to_le32(*size); |
| 1851 | |
| 1852 | inc_rfc1001_len(req, *size - 1 /* Buffer */); |
| 1853 | |
| 1854 | memcpy(req->Buffer, *data, *size); |
| 1855 | |
| 1856 | iov[0].iov_base = (char *)req; |
| 1857 | /* 4 for RFC1001 length */ |
| 1858 | iov[0].iov_len = get_rfc1002_length(req) + 4; |
| 1859 | |
| 1860 | for (i = 1; i < num; i++) { |
| 1861 | inc_rfc1001_len(req, size[i]); |
| 1862 | le32_add_cpu(&req->BufferLength, size[i]); |
| 1863 | iov[i].iov_base = (char *)data[i]; |
| 1864 | iov[i].iov_len = size[i]; |
| 1865 | } |
| 1866 | |
| 1867 | rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0); |
| 1868 | rsp = (struct smb2_set_info_rsp *)iov[0].iov_base; |
| 1869 | |
| 1870 | if (rc != 0) { |
| 1871 | cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); |
| 1872 | goto out; |
| 1873 | } |
Pavel Shilovsky | 35143eb | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 1874 | out: |
| 1875 | free_rsp_buf(resp_buftype, rsp); |
| 1876 | kfree(iov); |
| 1877 | return rc; |
| 1878 | } |
| 1879 | |
| 1880 | int |
| 1881 | SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon, |
| 1882 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) |
| 1883 | { |
| 1884 | struct smb2_file_rename_info info; |
| 1885 | void **data; |
| 1886 | unsigned int size[2]; |
| 1887 | int rc; |
| 1888 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); |
| 1889 | |
| 1890 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); |
| 1891 | if (!data) |
| 1892 | return -ENOMEM; |
| 1893 | |
| 1894 | info.ReplaceIfExists = 1; /* 1 = replace existing target with new */ |
| 1895 | /* 0 = fail if target already exists */ |
| 1896 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ |
| 1897 | info.FileNameLength = cpu_to_le32(len); |
| 1898 | |
| 1899 | data[0] = &info; |
| 1900 | size[0] = sizeof(struct smb2_file_rename_info); |
| 1901 | |
| 1902 | data[1] = target_file; |
| 1903 | size[1] = len + 2 /* null */; |
| 1904 | |
| 1905 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, |
Pavel Shilovsky | c839ff2 | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 1906 | current->tgid, FILE_RENAME_INFORMATION, 2, data, |
| 1907 | size); |
Pavel Shilovsky | 35143eb | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 1908 | kfree(data); |
| 1909 | return rc; |
| 1910 | } |
Pavel Shilovsky | 568798c | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 1911 | |
| 1912 | int |
| 1913 | SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon, |
| 1914 | u64 persistent_fid, u64 volatile_fid, __le16 *target_file) |
| 1915 | { |
| 1916 | struct smb2_file_link_info info; |
| 1917 | void **data; |
| 1918 | unsigned int size[2]; |
| 1919 | int rc; |
| 1920 | int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); |
| 1921 | |
| 1922 | data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); |
| 1923 | if (!data) |
| 1924 | return -ENOMEM; |
| 1925 | |
| 1926 | info.ReplaceIfExists = 0; /* 1 = replace existing link with new */ |
| 1927 | /* 0 = fail if link already exists */ |
| 1928 | info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ |
| 1929 | info.FileNameLength = cpu_to_le32(len); |
| 1930 | |
| 1931 | data[0] = &info; |
| 1932 | size[0] = sizeof(struct smb2_file_link_info); |
| 1933 | |
| 1934 | data[1] = target_file; |
| 1935 | size[1] = len + 2 /* null */; |
| 1936 | |
| 1937 | rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, |
Pavel Shilovsky | c839ff2 | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 1938 | current->tgid, FILE_LINK_INFORMATION, 2, data, size); |
Pavel Shilovsky | 568798c | 2012-09-18 16:20:31 -0700 | [diff] [blame] | 1939 | kfree(data); |
| 1940 | return rc; |
| 1941 | } |
Pavel Shilovsky | c839ff2 | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 1942 | |
| 1943 | int |
| 1944 | SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, |
| 1945 | u64 volatile_fid, u32 pid, __le64 *eof) |
| 1946 | { |
| 1947 | struct smb2_file_eof_info info; |
| 1948 | void *data; |
| 1949 | unsigned int size; |
| 1950 | |
| 1951 | info.EndOfFile = *eof; |
| 1952 | |
| 1953 | data = &info; |
| 1954 | size = sizeof(struct smb2_file_eof_info); |
| 1955 | |
| 1956 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid, |
| 1957 | FILE_END_OF_FILE_INFORMATION, 1, &data, &size); |
| 1958 | } |
Pavel Shilovsky | 1feeaac | 2012-09-18 16:20:32 -0700 | [diff] [blame] | 1959 | |
| 1960 | int |
| 1961 | SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon, |
| 1962 | u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf) |
| 1963 | { |
| 1964 | unsigned int size; |
| 1965 | size = sizeof(FILE_BASIC_INFO); |
| 1966 | return send_set_info(xid, tcon, persistent_fid, volatile_fid, |
| 1967 | current->tgid, FILE_BASIC_INFORMATION, 1, |
| 1968 | (void **)&buf, &size); |
| 1969 | } |
Pavel Shilovsky | 983c88a | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 1970 | |
| 1971 | int |
| 1972 | SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, |
| 1973 | const u64 persistent_fid, const u64 volatile_fid, |
| 1974 | __u8 oplock_level) |
| 1975 | { |
| 1976 | int rc; |
| 1977 | struct smb2_oplock_break *req = NULL; |
| 1978 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1979 | cifs_dbg(FYI, "SMB2_oplock_break\n"); |
Pavel Shilovsky | 983c88a | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 1980 | rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); |
| 1981 | |
| 1982 | if (rc) |
| 1983 | return rc; |
| 1984 | |
| 1985 | req->VolatileFid = volatile_fid; |
| 1986 | req->PersistentFid = persistent_fid; |
| 1987 | req->OplockLevel = oplock_level; |
| 1988 | req->hdr.CreditRequest = cpu_to_le16(1); |
| 1989 | |
| 1990 | rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); |
| 1991 | /* SMB2 buffer freed by function above */ |
| 1992 | |
| 1993 | if (rc) { |
| 1994 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1995 | cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); |
Pavel Shilovsky | 983c88a | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 1996 | } |
| 1997 | |
| 1998 | return rc; |
| 1999 | } |
Pavel Shilovsky | 6fc05c2 | 2012-09-18 16:20:34 -0700 | [diff] [blame] | 2000 | |
| 2001 | static void |
| 2002 | copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, |
| 2003 | struct kstatfs *kst) |
| 2004 | { |
| 2005 | kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * |
| 2006 | le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); |
| 2007 | kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); |
| 2008 | kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits); |
| 2009 | kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); |
| 2010 | return; |
| 2011 | } |
| 2012 | |
| 2013 | static int |
| 2014 | build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level, |
| 2015 | int outbuf_len, u64 persistent_fid, u64 volatile_fid) |
| 2016 | { |
| 2017 | int rc; |
| 2018 | struct smb2_query_info_req *req; |
| 2019 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2020 | cifs_dbg(FYI, "Query FSInfo level %d\n", level); |
Pavel Shilovsky | 6fc05c2 | 2012-09-18 16:20:34 -0700 | [diff] [blame] | 2021 | |
| 2022 | if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) |
| 2023 | return -EIO; |
| 2024 | |
| 2025 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); |
| 2026 | if (rc) |
| 2027 | return rc; |
| 2028 | |
| 2029 | req->InfoType = SMB2_O_INFO_FILESYSTEM; |
| 2030 | req->FileInfoClass = level; |
| 2031 | req->PersistentFileId = persistent_fid; |
| 2032 | req->VolatileFileId = volatile_fid; |
| 2033 | /* 4 for rfc1002 length field and 1 for pad */ |
| 2034 | req->InputBufferOffset = |
| 2035 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); |
| 2036 | req->OutputBufferLength = cpu_to_le32( |
| 2037 | outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4); |
| 2038 | |
| 2039 | iov->iov_base = (char *)req; |
| 2040 | /* 4 for rfc1002 length field */ |
| 2041 | iov->iov_len = get_rfc1002_length(req) + 4; |
| 2042 | return 0; |
| 2043 | } |
| 2044 | |
| 2045 | int |
| 2046 | SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, |
| 2047 | u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) |
| 2048 | { |
| 2049 | struct smb2_query_info_rsp *rsp = NULL; |
| 2050 | struct kvec iov; |
| 2051 | int rc = 0; |
| 2052 | int resp_buftype; |
| 2053 | struct cifs_ses *ses = tcon->ses; |
| 2054 | struct smb2_fs_full_size_info *info = NULL; |
| 2055 | |
| 2056 | rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION, |
| 2057 | sizeof(struct smb2_fs_full_size_info), |
| 2058 | persistent_fid, volatile_fid); |
| 2059 | if (rc) |
| 2060 | return rc; |
| 2061 | |
| 2062 | rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0); |
| 2063 | if (rc) { |
| 2064 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); |
| 2065 | goto qinf_exit; |
| 2066 | } |
| 2067 | rsp = (struct smb2_query_info_rsp *)iov.iov_base; |
| 2068 | |
| 2069 | info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ + |
| 2070 | le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr); |
| 2071 | rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), |
| 2072 | le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, |
| 2073 | sizeof(struct smb2_fs_full_size_info)); |
| 2074 | if (!rc) |
| 2075 | copy_fs_info_to_kstatfs(info, fsdata); |
| 2076 | |
| 2077 | qinf_exit: |
| 2078 | free_rsp_buf(resp_buftype, iov.iov_base); |
| 2079 | return rc; |
| 2080 | } |
Pavel Shilovsky | f7ba7fe | 2012-09-19 06:22:43 -0700 | [diff] [blame] | 2081 | |
| 2082 | int |
| 2083 | smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, |
| 2084 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, |
| 2085 | const __u32 num_lock, struct smb2_lock_element *buf) |
| 2086 | { |
| 2087 | int rc = 0; |
| 2088 | struct smb2_lock_req *req = NULL; |
| 2089 | struct kvec iov[2]; |
| 2090 | int resp_buf_type; |
| 2091 | unsigned int count; |
| 2092 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2093 | cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); |
Pavel Shilovsky | f7ba7fe | 2012-09-19 06:22:43 -0700 | [diff] [blame] | 2094 | |
| 2095 | rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req); |
| 2096 | if (rc) |
| 2097 | return rc; |
| 2098 | |
| 2099 | req->hdr.ProcessId = cpu_to_le32(pid); |
| 2100 | req->LockCount = cpu_to_le16(num_lock); |
| 2101 | |
| 2102 | req->PersistentFileId = persist_fid; |
| 2103 | req->VolatileFileId = volatile_fid; |
| 2104 | |
| 2105 | count = num_lock * sizeof(struct smb2_lock_element); |
| 2106 | inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element)); |
| 2107 | |
| 2108 | iov[0].iov_base = (char *)req; |
| 2109 | /* 4 for rfc1002 length field and count for all locks */ |
| 2110 | iov[0].iov_len = get_rfc1002_length(req) + 4 - count; |
| 2111 | iov[1].iov_base = (char *)buf; |
| 2112 | iov[1].iov_len = count; |
| 2113 | |
| 2114 | cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); |
| 2115 | rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP); |
| 2116 | if (rc) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2117 | cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); |
Pavel Shilovsky | f7ba7fe | 2012-09-19 06:22:43 -0700 | [diff] [blame] | 2118 | cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); |
| 2119 | } |
| 2120 | |
| 2121 | return rc; |
| 2122 | } |
| 2123 | |
| 2124 | int |
| 2125 | SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, |
| 2126 | const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, |
| 2127 | const __u64 length, const __u64 offset, const __u32 lock_flags, |
| 2128 | const bool wait) |
| 2129 | { |
| 2130 | struct smb2_lock_element lock; |
| 2131 | |
| 2132 | lock.Offset = cpu_to_le64(offset); |
| 2133 | lock.Length = cpu_to_le64(length); |
| 2134 | lock.Flags = cpu_to_le32(lock_flags); |
| 2135 | if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) |
| 2136 | lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); |
| 2137 | |
| 2138 | return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); |
| 2139 | } |
Pavel Shilovsky | 0822f51 | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 2140 | |
| 2141 | int |
| 2142 | SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, |
| 2143 | __u8 *lease_key, const __le32 lease_state) |
| 2144 | { |
| 2145 | int rc; |
| 2146 | struct smb2_lease_ack *req = NULL; |
| 2147 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2148 | cifs_dbg(FYI, "SMB2_lease_break\n"); |
Pavel Shilovsky | 0822f51 | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 2149 | rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); |
| 2150 | |
| 2151 | if (rc) |
| 2152 | return rc; |
| 2153 | |
| 2154 | req->hdr.CreditRequest = cpu_to_le16(1); |
| 2155 | req->StructureSize = cpu_to_le16(36); |
| 2156 | inc_rfc1001_len(req, 12); |
| 2157 | |
| 2158 | memcpy(req->LeaseKey, lease_key, 16); |
| 2159 | req->LeaseState = lease_state; |
| 2160 | |
| 2161 | rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); |
| 2162 | /* SMB2 buffer freed by function above */ |
| 2163 | |
| 2164 | if (rc) { |
| 2165 | cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2166 | cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); |
Pavel Shilovsky | 0822f51 | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 2167 | } |
| 2168 | |
| 2169 | return rc; |
| 2170 | } |