Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/smb2pdu.c |
| 3 | * |
| 4 | * Copyright (C) International Business Machines Corp., 2009, 2011 |
| 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 | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 48 | |
| 49 | /* |
| 50 | * The following table defines the expected "StructureSize" of SMB2 requests |
| 51 | * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests. |
| 52 | * |
| 53 | * Note that commands are defined in smb2pdu.h in le16 but the array below is |
| 54 | * indexed by command in host byte order. |
| 55 | */ |
| 56 | static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = { |
| 57 | /* SMB2_NEGOTIATE */ 36, |
| 58 | /* SMB2_SESSION_SETUP */ 25, |
| 59 | /* SMB2_LOGOFF */ 4, |
| 60 | /* SMB2_TREE_CONNECT */ 9, |
| 61 | /* SMB2_TREE_DISCONNECT */ 4, |
| 62 | /* SMB2_CREATE */ 57, |
| 63 | /* SMB2_CLOSE */ 24, |
| 64 | /* SMB2_FLUSH */ 24, |
| 65 | /* SMB2_READ */ 49, |
| 66 | /* SMB2_WRITE */ 49, |
| 67 | /* SMB2_LOCK */ 48, |
| 68 | /* SMB2_IOCTL */ 57, |
| 69 | /* SMB2_CANCEL */ 4, |
| 70 | /* SMB2_ECHO */ 4, |
| 71 | /* SMB2_QUERY_DIRECTORY */ 33, |
| 72 | /* SMB2_CHANGE_NOTIFY */ 32, |
| 73 | /* SMB2_QUERY_INFO */ 41, |
| 74 | /* SMB2_SET_INFO */ 33, |
| 75 | /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */ |
| 76 | }; |
| 77 | |
| 78 | |
| 79 | static void |
| 80 | smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ , |
| 81 | const struct cifs_tcon *tcon) |
| 82 | { |
| 83 | struct smb2_pdu *pdu = (struct smb2_pdu *)hdr; |
| 84 | char *temp = (char *)hdr; |
| 85 | /* lookup word count ie StructureSize from table */ |
| 86 | __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)]; |
| 87 | |
| 88 | /* |
| 89 | * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of |
| 90 | * largest operations (Create) |
| 91 | */ |
| 92 | memset(temp, 0, 256); |
| 93 | |
| 94 | /* Note this is only network field converted to big endian */ |
| 95 | hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr) |
| 96 | - 4 /* RFC 1001 length field itself not counted */); |
| 97 | |
| 98 | hdr->ProtocolId[0] = 0xFE; |
| 99 | hdr->ProtocolId[1] = 'S'; |
| 100 | hdr->ProtocolId[2] = 'M'; |
| 101 | hdr->ProtocolId[3] = 'B'; |
| 102 | hdr->StructureSize = cpu_to_le16(64); |
| 103 | hdr->Command = smb2_cmd; |
| 104 | hdr->CreditRequest = cpu_to_le16(2); /* BB make this dynamic */ |
| 105 | hdr->ProcessId = cpu_to_le32((__u16)current->tgid); |
| 106 | |
| 107 | if (!tcon) |
| 108 | goto out; |
| 109 | |
| 110 | hdr->TreeId = tcon->tid; |
| 111 | /* Uid is not converted */ |
| 112 | if (tcon->ses) |
| 113 | hdr->SessionId = tcon->ses->Suid; |
| 114 | /* BB check following DFS flags BB */ |
| 115 | /* 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] | 116 | if (tcon->share_flags & SHI1005_FLAGS_DFS) |
| 117 | hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 118 | /* BB how does SMB2 do case sensitive? */ |
| 119 | /* if (tcon->nocase) |
| 120 | hdr->Flags |= SMBFLG_CASELESS; */ |
| 121 | /* if (tcon->ses && tcon->ses->server && |
| 122 | (tcon->ses->server->sec_mode & SECMODE_SIGN_REQUIRED)) |
| 123 | hdr->Flags |= SMB2_FLAGS_SIGNED; */ |
| 124 | out: |
| 125 | pdu->StructureSize2 = cpu_to_le16(parmsize); |
| 126 | return; |
| 127 | } |
| 128 | |
| 129 | static int |
| 130 | smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) |
| 131 | { |
| 132 | int rc = 0; |
Pavel Shilovsky | aa24d1e | 2011-12-27 16:23:34 +0400 | [diff] [blame] | 133 | struct nls_table *nls_codepage; |
| 134 | struct cifs_ses *ses; |
| 135 | struct TCP_Server_Info *server; |
| 136 | |
| 137 | /* |
| 138 | * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so |
| 139 | * check for tcp and smb session status done differently |
| 140 | * for those three - in the calling routine. |
| 141 | */ |
| 142 | if (tcon == NULL) |
| 143 | return rc; |
| 144 | |
| 145 | if (smb2_command == SMB2_TREE_CONNECT) |
| 146 | return rc; |
| 147 | |
| 148 | if (tcon->tidStatus == CifsExiting) { |
| 149 | /* |
| 150 | * only tree disconnect, open, and write, |
| 151 | * (and ulogoff which does not have tcon) |
| 152 | * are allowed as we start force umount. |
| 153 | */ |
| 154 | if ((smb2_command != SMB2_WRITE) && |
| 155 | (smb2_command != SMB2_CREATE) && |
| 156 | (smb2_command != SMB2_TREE_DISCONNECT)) { |
| 157 | cFYI(1, "can not send cmd %d while umounting", |
| 158 | smb2_command); |
| 159 | return -ENODEV; |
| 160 | } |
| 161 | } |
| 162 | if ((!tcon->ses) || (tcon->ses->status == CifsExiting) || |
| 163 | (!tcon->ses->server)) |
| 164 | return -EIO; |
| 165 | |
| 166 | ses = tcon->ses; |
| 167 | server = ses->server; |
| 168 | |
| 169 | /* |
| 170 | * Give demultiplex thread up to 10 seconds to reconnect, should be |
| 171 | * greater than cifs socket timeout which is 7 seconds |
| 172 | */ |
| 173 | while (server->tcpStatus == CifsNeedReconnect) { |
| 174 | /* |
| 175 | * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE |
| 176 | * here since they are implicitly done when session drops. |
| 177 | */ |
| 178 | switch (smb2_command) { |
| 179 | /* |
| 180 | * BB Should we keep oplock break and add flush to exceptions? |
| 181 | */ |
| 182 | case SMB2_TREE_DISCONNECT: |
| 183 | case SMB2_CANCEL: |
| 184 | case SMB2_CLOSE: |
| 185 | case SMB2_OPLOCK_BREAK: |
| 186 | return -EAGAIN; |
| 187 | } |
| 188 | |
| 189 | wait_event_interruptible_timeout(server->response_q, |
| 190 | (server->tcpStatus != CifsNeedReconnect), 10 * HZ); |
| 191 | |
| 192 | /* are we still trying to reconnect? */ |
| 193 | if (server->tcpStatus != CifsNeedReconnect) |
| 194 | break; |
| 195 | |
| 196 | /* |
| 197 | * on "soft" mounts we wait once. Hard mounts keep |
| 198 | * retrying until process is killed or server comes |
| 199 | * back on-line |
| 200 | */ |
| 201 | if (!tcon->retry) { |
| 202 | cFYI(1, "gave up waiting on reconnect in smb_init"); |
| 203 | return -EHOSTDOWN; |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | if (!tcon->ses->need_reconnect && !tcon->need_reconnect) |
| 208 | return rc; |
| 209 | |
| 210 | nls_codepage = load_nls_default(); |
| 211 | |
| 212 | /* |
| 213 | * need to prevent multiple threads trying to simultaneously reconnect |
| 214 | * the same SMB session |
| 215 | */ |
| 216 | mutex_lock(&tcon->ses->session_mutex); |
| 217 | rc = cifs_negotiate_protocol(0, tcon->ses); |
| 218 | if (!rc && tcon->ses->need_reconnect) |
| 219 | rc = cifs_setup_session(0, tcon->ses, nls_codepage); |
| 220 | |
| 221 | if (rc || !tcon->need_reconnect) { |
| 222 | mutex_unlock(&tcon->ses->session_mutex); |
| 223 | goto out; |
| 224 | } |
| 225 | |
| 226 | cifs_mark_open_files_invalid(tcon); |
| 227 | rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage); |
| 228 | mutex_unlock(&tcon->ses->session_mutex); |
| 229 | cFYI(1, "reconnect tcon rc = %d", rc); |
| 230 | if (rc) |
| 231 | goto out; |
| 232 | atomic_inc(&tconInfoReconnectCount); |
| 233 | /* |
| 234 | * BB FIXME add code to check if wsize needs update due to negotiated |
| 235 | * smb buffer size shrinking. |
| 236 | */ |
| 237 | out: |
| 238 | /* |
| 239 | * Check if handle based operation so we know whether we can continue |
| 240 | * or not without returning to caller to reset file handle. |
| 241 | */ |
| 242 | /* |
| 243 | * BB Is flush done by server on drop of tcp session? Should we special |
| 244 | * case it and skip above? |
| 245 | */ |
| 246 | switch (smb2_command) { |
| 247 | case SMB2_FLUSH: |
| 248 | case SMB2_READ: |
| 249 | case SMB2_WRITE: |
| 250 | case SMB2_LOCK: |
| 251 | case SMB2_IOCTL: |
| 252 | case SMB2_QUERY_DIRECTORY: |
| 253 | case SMB2_CHANGE_NOTIFY: |
| 254 | case SMB2_QUERY_INFO: |
| 255 | case SMB2_SET_INFO: |
| 256 | return -EAGAIN; |
| 257 | } |
| 258 | unload_nls(nls_codepage); |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 259 | return rc; |
| 260 | } |
| 261 | |
| 262 | /* |
| 263 | * Allocate and return pointer to an SMB request hdr, and set basic |
| 264 | * SMB information in the SMB header. If the return code is zero, this |
| 265 | * function must have filled in request_buf pointer. |
| 266 | */ |
| 267 | static int |
| 268 | small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon, |
| 269 | void **request_buf) |
| 270 | { |
| 271 | int rc = 0; |
| 272 | |
| 273 | rc = smb2_reconnect(smb2_command, tcon); |
| 274 | if (rc) |
| 275 | return rc; |
| 276 | |
| 277 | /* BB eventually switch this to SMB2 specific small buf size */ |
| 278 | *request_buf = cifs_small_buf_get(); |
| 279 | if (*request_buf == NULL) { |
| 280 | /* BB should we add a retry in here if not a writepage? */ |
| 281 | return -ENOMEM; |
| 282 | } |
| 283 | |
| 284 | smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon); |
| 285 | |
| 286 | if (tcon != NULL) { |
| 287 | #ifdef CONFIG_CIFS_STATS2 |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 288 | uint16_t com_code = le16_to_cpu(smb2_command); |
| 289 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 290 | #endif |
| 291 | cifs_stats_inc(&tcon->num_smbs_sent); |
| 292 | } |
| 293 | |
| 294 | return rc; |
| 295 | } |
| 296 | |
| 297 | static void |
| 298 | free_rsp_buf(int resp_buftype, void *rsp) |
| 299 | { |
| 300 | if (resp_buftype == CIFS_SMALL_BUFFER) |
| 301 | cifs_small_buf_release(rsp); |
| 302 | else if (resp_buftype == CIFS_LARGE_BUFFER) |
| 303 | cifs_buf_release(rsp); |
| 304 | } |
| 305 | |
| 306 | #define SMB2_NUM_PROT 1 |
| 307 | |
| 308 | #define SMB2_PROT 0 |
| 309 | #define SMB21_PROT 1 |
| 310 | #define BAD_PROT 0xFFFF |
| 311 | |
| 312 | #define SMB2_PROT_ID 0x0202 |
| 313 | #define SMB21_PROT_ID 0x0210 |
| 314 | #define BAD_PROT_ID 0xFFFF |
| 315 | |
| 316 | static struct { |
| 317 | int index; |
| 318 | __le16 name; |
| 319 | } smb2protocols[] = { |
| 320 | {SMB2_PROT, cpu_to_le16(SMB2_PROT_ID)}, |
| 321 | {SMB21_PROT, cpu_to_le16(SMB21_PROT_ID)}, |
| 322 | {BAD_PROT, cpu_to_le16(BAD_PROT_ID)} |
| 323 | }; |
| 324 | |
| 325 | /* |
| 326 | * |
| 327 | * SMB2 Worker functions follow: |
| 328 | * |
| 329 | * The general structure of the worker functions is: |
| 330 | * 1) Call smb2_init (assembles SMB2 header) |
| 331 | * 2) Initialize SMB2 command specific fields in fixed length area of SMB |
| 332 | * 3) Call smb_sendrcv2 (sends request on socket and waits for response) |
| 333 | * 4) Decode SMB2 command specific fields in the fixed length area |
| 334 | * 5) Decode variable length data area (if any for this SMB2 command type) |
| 335 | * 6) Call free smb buffer |
| 336 | * 7) return |
| 337 | * |
| 338 | */ |
| 339 | |
| 340 | int |
| 341 | SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) |
| 342 | { |
| 343 | struct smb2_negotiate_req *req; |
| 344 | struct smb2_negotiate_rsp *rsp; |
| 345 | struct kvec iov[1]; |
| 346 | int rc = 0; |
| 347 | int resp_buftype; |
| 348 | struct TCP_Server_Info *server; |
| 349 | unsigned int sec_flags; |
| 350 | u16 i; |
| 351 | u16 temp = 0; |
| 352 | int blob_offset, blob_length; |
| 353 | char *security_blob; |
| 354 | int flags = CIFS_NEG_OP; |
| 355 | |
| 356 | cFYI(1, "Negotiate protocol"); |
| 357 | |
| 358 | if (ses->server) |
| 359 | server = ses->server; |
| 360 | else { |
| 361 | rc = -EIO; |
| 362 | return rc; |
| 363 | } |
| 364 | |
| 365 | rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req); |
| 366 | if (rc) |
| 367 | return rc; |
| 368 | |
| 369 | /* if any of auth flags (ie not sign or seal) are overriden use them */ |
| 370 | if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) |
| 371 | sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/ |
| 372 | else /* if override flags set only sign/seal OR them with global auth */ |
| 373 | sec_flags = global_secflags | ses->overrideSecFlg; |
| 374 | |
| 375 | cFYI(1, "sec_flags 0x%x", sec_flags); |
| 376 | |
| 377 | req->hdr.SessionId = 0; |
| 378 | |
| 379 | for (i = 0; i < SMB2_NUM_PROT; i++) |
| 380 | req->Dialects[i] = smb2protocols[i].name; |
| 381 | |
| 382 | req->DialectCount = cpu_to_le16(i); |
| 383 | inc_rfc1001_len(req, i * 2); |
| 384 | |
| 385 | /* only one of SMB2 signing flags may be set in SMB2 request */ |
| 386 | if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) |
| 387 | temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; |
| 388 | else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */ |
| 389 | temp = SMB2_NEGOTIATE_SIGNING_ENABLED; |
| 390 | |
| 391 | req->SecurityMode = cpu_to_le16(temp); |
| 392 | |
| 393 | req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS); |
| 394 | |
| 395 | iov[0].iov_base = (char *)req; |
| 396 | /* 4 for rfc1002 length field */ |
| 397 | iov[0].iov_len = get_rfc1002_length(req) + 4; |
| 398 | |
| 399 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags); |
| 400 | |
| 401 | rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base; |
| 402 | /* |
| 403 | * No tcon so can't do |
| 404 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); |
| 405 | */ |
| 406 | if (rc != 0) |
| 407 | goto neg_exit; |
| 408 | |
| 409 | if (rsp == NULL) { |
| 410 | rc = -EIO; |
| 411 | goto neg_exit; |
| 412 | } |
| 413 | |
| 414 | cFYI(1, "mode 0x%x", rsp->SecurityMode); |
| 415 | |
| 416 | if (rsp->DialectRevision == smb2protocols[SMB21_PROT].name) |
| 417 | cFYI(1, "negotiated smb2.1 dialect"); |
| 418 | else if (rsp->DialectRevision == smb2protocols[SMB2_PROT].name) |
| 419 | cFYI(1, "negotiated smb2 dialect"); |
| 420 | else { |
| 421 | cERROR(1, "Illegal dialect returned by server %d", |
| 422 | le16_to_cpu(rsp->DialectRevision)); |
| 423 | rc = -EIO; |
| 424 | goto neg_exit; |
| 425 | } |
| 426 | server->dialect = le16_to_cpu(rsp->DialectRevision); |
| 427 | |
| 428 | server->maxBuf = le32_to_cpu(rsp->MaxTransactSize); |
| 429 | server->max_read = le32_to_cpu(rsp->MaxReadSize); |
| 430 | server->max_write = le32_to_cpu(rsp->MaxWriteSize); |
| 431 | /* BB Do we need to validate the SecurityMode? */ |
| 432 | server->sec_mode = le16_to_cpu(rsp->SecurityMode); |
| 433 | server->capabilities = le32_to_cpu(rsp->Capabilities); |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 434 | /* Internal types */ |
| 435 | server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; |
Pavel Shilovsky | ec2e452 | 2011-12-27 16:12:43 +0400 | [diff] [blame] | 436 | |
| 437 | security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, |
| 438 | &rsp->hdr); |
| 439 | if (blob_length == 0) { |
| 440 | cERROR(1, "missing security blob on negprot"); |
| 441 | rc = -EIO; |
| 442 | goto neg_exit; |
| 443 | } |
| 444 | #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */ |
| 445 | rc = decode_neg_token_init(security_blob, blob_length, |
| 446 | &server->sec_type); |
| 447 | if (rc == 1) |
| 448 | rc = 0; |
| 449 | else if (rc == 0) { |
| 450 | rc = -EIO; |
| 451 | goto neg_exit; |
| 452 | } |
| 453 | #endif |
| 454 | |
| 455 | neg_exit: |
| 456 | free_rsp_buf(resp_buftype, rsp); |
| 457 | return rc; |
| 458 | } |
Pavel Shilovsky | 5478f9b | 2011-12-27 16:22:00 +0400 | [diff] [blame] | 459 | |
| 460 | int |
| 461 | SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, |
| 462 | const struct nls_table *nls_cp) |
| 463 | { |
| 464 | struct smb2_sess_setup_req *req; |
| 465 | struct smb2_sess_setup_rsp *rsp = NULL; |
| 466 | struct kvec iov[2]; |
| 467 | int rc = 0; |
| 468 | int resp_buftype; |
| 469 | __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ |
| 470 | struct TCP_Server_Info *server; |
| 471 | unsigned int sec_flags; |
| 472 | u8 temp = 0; |
| 473 | u16 blob_length = 0; |
| 474 | char *security_blob; |
| 475 | char *ntlmssp_blob = NULL; |
| 476 | bool use_spnego = false; /* else use raw ntlmssp */ |
| 477 | |
| 478 | cFYI(1, "Session Setup"); |
| 479 | |
| 480 | if (ses->server) |
| 481 | server = ses->server; |
| 482 | else { |
| 483 | rc = -EIO; |
| 484 | return rc; |
| 485 | } |
| 486 | |
| 487 | /* |
| 488 | * If memory allocation is successful, caller of this function |
| 489 | * frees it. |
| 490 | */ |
| 491 | ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); |
| 492 | if (!ses->ntlmssp) |
| 493 | return -ENOMEM; |
| 494 | |
| 495 | ses->server->secType = RawNTLMSSP; |
| 496 | |
| 497 | ssetup_ntlmssp_authenticate: |
| 498 | if (phase == NtLmChallenge) |
| 499 | phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ |
| 500 | |
| 501 | rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req); |
| 502 | if (rc) |
| 503 | return rc; |
| 504 | |
| 505 | /* if any of auth flags (ie not sign or seal) are overriden use them */ |
| 506 | if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) |
| 507 | sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/ |
| 508 | else /* if override flags set only sign/seal OR them with global auth */ |
| 509 | sec_flags = global_secflags | ses->overrideSecFlg; |
| 510 | |
| 511 | cFYI(1, "sec_flags 0x%x", sec_flags); |
| 512 | |
| 513 | req->hdr.SessionId = 0; /* First session, not a reauthenticate */ |
| 514 | req->VcNumber = 0; /* MBZ */ |
| 515 | /* to enable echos and oplocks */ |
| 516 | req->hdr.CreditRequest = cpu_to_le16(3); |
| 517 | |
| 518 | /* only one of SMB2 signing flags may be set in SMB2 request */ |
| 519 | if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) |
| 520 | temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; |
| 521 | else if (ses->server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) |
| 522 | temp = SMB2_NEGOTIATE_SIGNING_REQUIRED; |
| 523 | else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */ |
| 524 | temp = SMB2_NEGOTIATE_SIGNING_ENABLED; |
| 525 | |
| 526 | req->SecurityMode = temp; |
| 527 | req->Capabilities = 0; |
| 528 | req->Channel = 0; /* MBZ */ |
| 529 | |
| 530 | iov[0].iov_base = (char *)req; |
| 531 | /* 4 for rfc1002 length field and 1 for pad */ |
| 532 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; |
| 533 | if (phase == NtLmNegotiate) { |
| 534 | ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE), |
| 535 | GFP_KERNEL); |
| 536 | if (ntlmssp_blob == NULL) { |
| 537 | rc = -ENOMEM; |
| 538 | goto ssetup_exit; |
| 539 | } |
| 540 | build_ntlmssp_negotiate_blob(ntlmssp_blob, ses); |
| 541 | if (use_spnego) { |
| 542 | /* blob_length = build_spnego_ntlmssp_blob( |
| 543 | &security_blob, |
| 544 | sizeof(struct _NEGOTIATE_MESSAGE), |
| 545 | ntlmssp_blob); */ |
| 546 | /* BB eventually need to add this */ |
| 547 | cERROR(1, "spnego not supported for SMB2 yet"); |
| 548 | rc = -EOPNOTSUPP; |
| 549 | kfree(ntlmssp_blob); |
| 550 | goto ssetup_exit; |
| 551 | } else { |
| 552 | blob_length = sizeof(struct _NEGOTIATE_MESSAGE); |
| 553 | /* with raw NTLMSSP we don't encapsulate in SPNEGO */ |
| 554 | security_blob = ntlmssp_blob; |
| 555 | } |
| 556 | } else if (phase == NtLmAuthenticate) { |
| 557 | req->hdr.SessionId = ses->Suid; |
| 558 | ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500, |
| 559 | GFP_KERNEL); |
| 560 | if (ntlmssp_blob == NULL) { |
| 561 | cERROR(1, "failed to malloc ntlmssp blob"); |
| 562 | rc = -ENOMEM; |
| 563 | goto ssetup_exit; |
| 564 | } |
| 565 | rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses, |
| 566 | nls_cp); |
| 567 | if (rc) { |
| 568 | cFYI(1, "build_ntlmssp_auth_blob failed %d", rc); |
| 569 | goto ssetup_exit; /* BB double check error handling */ |
| 570 | } |
| 571 | if (use_spnego) { |
| 572 | /* blob_length = build_spnego_ntlmssp_blob( |
| 573 | &security_blob, |
| 574 | blob_length, |
| 575 | ntlmssp_blob); */ |
| 576 | cERROR(1, "spnego not supported for SMB2 yet"); |
| 577 | rc = -EOPNOTSUPP; |
| 578 | kfree(ntlmssp_blob); |
| 579 | goto ssetup_exit; |
| 580 | } else { |
| 581 | security_blob = ntlmssp_blob; |
| 582 | } |
| 583 | } else { |
| 584 | cERROR(1, "illegal ntlmssp phase"); |
| 585 | rc = -EIO; |
| 586 | goto ssetup_exit; |
| 587 | } |
| 588 | |
| 589 | /* Testing shows that buffer offset must be at location of Buffer[0] */ |
| 590 | req->SecurityBufferOffset = |
| 591 | cpu_to_le16(sizeof(struct smb2_sess_setup_req) - |
| 592 | 1 /* pad */ - 4 /* rfc1001 len */); |
| 593 | req->SecurityBufferLength = cpu_to_le16(blob_length); |
| 594 | iov[1].iov_base = security_blob; |
| 595 | iov[1].iov_len = blob_length; |
| 596 | |
| 597 | inc_rfc1001_len(req, blob_length - 1 /* pad */); |
| 598 | |
| 599 | /* BB add code to build os and lm fields */ |
| 600 | |
| 601 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, CIFS_LOG_ERROR); |
| 602 | |
| 603 | kfree(security_blob); |
| 604 | rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base; |
| 605 | if (rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) { |
| 606 | if (phase != NtLmNegotiate) { |
| 607 | cERROR(1, "Unexpected more processing error"); |
| 608 | goto ssetup_exit; |
| 609 | } |
| 610 | if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 != |
| 611 | le16_to_cpu(rsp->SecurityBufferOffset)) { |
| 612 | cERROR(1, "Invalid security buffer offset %d", |
| 613 | le16_to_cpu(rsp->SecurityBufferOffset)); |
| 614 | rc = -EIO; |
| 615 | goto ssetup_exit; |
| 616 | } |
| 617 | |
| 618 | /* NTLMSSP Negotiate sent now processing challenge (response) */ |
| 619 | phase = NtLmChallenge; /* process ntlmssp challenge */ |
| 620 | rc = 0; /* MORE_PROCESSING is not an error here but expected */ |
| 621 | ses->Suid = rsp->hdr.SessionId; |
| 622 | rc = decode_ntlmssp_challenge(rsp->Buffer, |
| 623 | le16_to_cpu(rsp->SecurityBufferLength), ses); |
| 624 | } |
| 625 | |
| 626 | /* |
| 627 | * BB eventually add code for SPNEGO decoding of NtlmChallenge blob, |
| 628 | * but at least the raw NTLMSSP case works. |
| 629 | */ |
| 630 | /* |
| 631 | * No tcon so can't do |
| 632 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); |
| 633 | */ |
| 634 | if (rc != 0) |
| 635 | goto ssetup_exit; |
| 636 | |
| 637 | if (rsp == NULL) { |
| 638 | rc = -EIO; |
| 639 | goto ssetup_exit; |
| 640 | } |
| 641 | |
| 642 | ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
| 643 | ssetup_exit: |
| 644 | free_rsp_buf(resp_buftype, rsp); |
| 645 | |
| 646 | /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ |
| 647 | if ((phase == NtLmChallenge) && (rc == 0)) |
| 648 | goto ssetup_ntlmssp_authenticate; |
| 649 | return rc; |
| 650 | } |
| 651 | |
| 652 | int |
| 653 | SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) |
| 654 | { |
| 655 | struct smb2_logoff_req *req; /* response is also trivial struct */ |
| 656 | int rc = 0; |
| 657 | struct TCP_Server_Info *server; |
| 658 | |
| 659 | cFYI(1, "disconnect session %p", ses); |
| 660 | |
| 661 | if (ses && (ses->server)) |
| 662 | server = ses->server; |
| 663 | else |
| 664 | return -EIO; |
| 665 | |
| 666 | rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req); |
| 667 | if (rc) |
| 668 | return rc; |
| 669 | |
| 670 | /* since no tcon, smb2_init can not do this, so do here */ |
| 671 | req->hdr.SessionId = ses->Suid; |
| 672 | |
| 673 | rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0); |
| 674 | /* |
| 675 | * No tcon so can't do |
| 676 | * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); |
| 677 | */ |
| 678 | return rc; |
| 679 | } |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 680 | |
| 681 | static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) |
| 682 | { |
Pavel Shilovsky | d60622e | 2012-05-28 15:19:39 +0400 | [diff] [blame] | 683 | cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
Pavel Shilovsky | faaf946 | 2011-12-27 16:04:00 +0400 | [diff] [blame] | 684 | } |
| 685 | |
| 686 | #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) |
| 687 | |
| 688 | int |
| 689 | SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, |
| 690 | struct cifs_tcon *tcon, const struct nls_table *cp) |
| 691 | { |
| 692 | struct smb2_tree_connect_req *req; |
| 693 | struct smb2_tree_connect_rsp *rsp = NULL; |
| 694 | struct kvec iov[2]; |
| 695 | int rc = 0; |
| 696 | int resp_buftype; |
| 697 | int unc_path_len; |
| 698 | struct TCP_Server_Info *server; |
| 699 | __le16 *unc_path = NULL; |
| 700 | |
| 701 | cFYI(1, "TCON"); |
| 702 | |
| 703 | if ((ses->server) && tree) |
| 704 | server = ses->server; |
| 705 | else |
| 706 | return -EIO; |
| 707 | |
| 708 | if (tcon && tcon->bad_network_name) |
| 709 | return -ENOENT; |
| 710 | |
| 711 | unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); |
| 712 | if (unc_path == NULL) |
| 713 | return -ENOMEM; |
| 714 | |
| 715 | unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1; |
| 716 | unc_path_len *= 2; |
| 717 | if (unc_path_len < 2) { |
| 718 | kfree(unc_path); |
| 719 | return -EINVAL; |
| 720 | } |
| 721 | |
| 722 | rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req); |
| 723 | if (rc) { |
| 724 | kfree(unc_path); |
| 725 | return rc; |
| 726 | } |
| 727 | |
| 728 | if (tcon == NULL) { |
| 729 | /* since no tcon, smb2_init can not do this, so do here */ |
| 730 | req->hdr.SessionId = ses->Suid; |
| 731 | /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED) |
| 732 | req->hdr.Flags |= SMB2_FLAGS_SIGNED; */ |
| 733 | } |
| 734 | |
| 735 | iov[0].iov_base = (char *)req; |
| 736 | /* 4 for rfc1002 length field and 1 for pad */ |
| 737 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; |
| 738 | |
| 739 | /* Testing shows that buffer offset must be at location of Buffer[0] */ |
| 740 | req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) |
| 741 | - 1 /* pad */ - 4 /* do not count rfc1001 len field */); |
| 742 | req->PathLength = cpu_to_le16(unc_path_len - 2); |
| 743 | iov[1].iov_base = unc_path; |
| 744 | iov[1].iov_len = unc_path_len; |
| 745 | |
| 746 | inc_rfc1001_len(req, unc_path_len - 1 /* pad */); |
| 747 | |
| 748 | rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); |
| 749 | rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base; |
| 750 | |
| 751 | if (rc != 0) { |
| 752 | if (tcon) { |
| 753 | cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); |
| 754 | tcon->need_reconnect = true; |
| 755 | } |
| 756 | goto tcon_error_exit; |
| 757 | } |
| 758 | |
| 759 | if (rsp == NULL) { |
| 760 | rc = -EIO; |
| 761 | goto tcon_exit; |
| 762 | } |
| 763 | |
| 764 | if (tcon == NULL) { |
| 765 | ses->ipc_tid = rsp->hdr.TreeId; |
| 766 | goto tcon_exit; |
| 767 | } |
| 768 | |
| 769 | if (rsp->ShareType & SMB2_SHARE_TYPE_DISK) |
| 770 | cFYI(1, "connection to disk share"); |
| 771 | else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) { |
| 772 | tcon->ipc = true; |
| 773 | cFYI(1, "connection to pipe share"); |
| 774 | } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) { |
| 775 | tcon->print = true; |
| 776 | cFYI(1, "connection to printer"); |
| 777 | } else { |
| 778 | cERROR(1, "unknown share type %d", rsp->ShareType); |
| 779 | rc = -EOPNOTSUPP; |
| 780 | goto tcon_error_exit; |
| 781 | } |
| 782 | |
| 783 | tcon->share_flags = le32_to_cpu(rsp->ShareFlags); |
| 784 | tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); |
| 785 | tcon->tidStatus = CifsGood; |
| 786 | tcon->need_reconnect = false; |
| 787 | tcon->tid = rsp->hdr.TreeId; |
| 788 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
| 789 | |
| 790 | if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && |
| 791 | ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) |
| 792 | cERROR(1, "DFS capability contradicts DFS flag"); |
| 793 | |
| 794 | tcon_exit: |
| 795 | free_rsp_buf(resp_buftype, rsp); |
| 796 | kfree(unc_path); |
| 797 | return rc; |
| 798 | |
| 799 | tcon_error_exit: |
| 800 | if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) { |
| 801 | cERROR(1, "BAD_NETWORK_NAME: %s", tree); |
| 802 | tcon->bad_network_name = true; |
| 803 | } |
| 804 | goto tcon_exit; |
| 805 | } |
| 806 | |
| 807 | int |
| 808 | SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) |
| 809 | { |
| 810 | struct smb2_tree_disconnect_req *req; /* response is trivial */ |
| 811 | int rc = 0; |
| 812 | struct TCP_Server_Info *server; |
| 813 | struct cifs_ses *ses = tcon->ses; |
| 814 | |
| 815 | cFYI(1, "Tree Disconnect"); |
| 816 | |
| 817 | if (ses && (ses->server)) |
| 818 | server = ses->server; |
| 819 | else |
| 820 | return -EIO; |
| 821 | |
| 822 | if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) |
| 823 | return 0; |
| 824 | |
| 825 | rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req); |
| 826 | if (rc) |
| 827 | return rc; |
| 828 | |
| 829 | rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0); |
| 830 | if (rc) |
| 831 | cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); |
| 832 | |
| 833 | return rc; |
| 834 | } |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 835 | |
| 836 | int |
| 837 | SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, |
| 838 | u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access, |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 839 | __u32 create_disposition, __u32 file_attributes, __u32 create_options, |
| 840 | struct smb2_file_all_info *buf) |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 841 | { |
| 842 | struct smb2_create_req *req; |
| 843 | struct smb2_create_rsp *rsp; |
| 844 | struct TCP_Server_Info *server; |
| 845 | struct cifs_ses *ses = tcon->ses; |
| 846 | struct kvec iov[2]; |
| 847 | int resp_buftype; |
| 848 | int uni_path_len; |
| 849 | int rc = 0; |
| 850 | int num_iovecs = 2; |
| 851 | |
| 852 | cFYI(1, "create/open"); |
| 853 | |
| 854 | if (ses && (ses->server)) |
| 855 | server = ses->server; |
| 856 | else |
| 857 | return -EIO; |
| 858 | |
| 859 | rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req); |
| 860 | if (rc) |
| 861 | return rc; |
| 862 | |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 863 | /* if (server->oplocks) |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 864 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_BATCH; |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 865 | else */ |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 866 | req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_NONE; |
| 867 | req->ImpersonationLevel = IL_IMPERSONATION; |
| 868 | req->DesiredAccess = cpu_to_le32(desired_access); |
| 869 | /* File attributes ignored on open (used in create though) */ |
| 870 | req->FileAttributes = cpu_to_le32(file_attributes); |
| 871 | req->ShareAccess = FILE_SHARE_ALL_LE; |
| 872 | req->CreateDisposition = cpu_to_le32(create_disposition); |
| 873 | req->CreateOptions = cpu_to_le32(create_options); |
| 874 | uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; |
| 875 | req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) |
| 876 | - 1 /* pad */ - 4 /* do not count rfc1001 len field */); |
| 877 | |
| 878 | iov[0].iov_base = (char *)req; |
| 879 | /* 4 for rfc1002 length field */ |
| 880 | iov[0].iov_len = get_rfc1002_length(req) + 4; |
| 881 | |
| 882 | /* MUST set path len (NameLength) to 0 opening root of share */ |
| 883 | if (uni_path_len >= 4) { |
| 884 | req->NameLength = cpu_to_le16(uni_path_len - 2); |
| 885 | /* -1 since last byte is buf[0] which is sent below (path) */ |
| 886 | iov[0].iov_len--; |
| 887 | iov[1].iov_len = uni_path_len; |
| 888 | iov[1].iov_base = path; |
| 889 | /* |
| 890 | * -1 since last byte is buf[0] which was counted in |
| 891 | * smb2_buf_len. |
| 892 | */ |
| 893 | inc_rfc1001_len(req, uni_path_len - 1); |
| 894 | } else { |
| 895 | num_iovecs = 1; |
| 896 | req->NameLength = 0; |
| 897 | } |
| 898 | |
| 899 | rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); |
| 900 | rsp = (struct smb2_create_rsp *)iov[0].iov_base; |
| 901 | |
| 902 | if (rc != 0) { |
| 903 | cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); |
| 904 | goto creat_exit; |
| 905 | } |
| 906 | |
| 907 | if (rsp == NULL) { |
| 908 | rc = -EIO; |
| 909 | goto creat_exit; |
| 910 | } |
| 911 | *persistent_fid = rsp->PersistentFileId; |
| 912 | *volatile_fid = rsp->VolatileFileId; |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 913 | |
| 914 | if (buf) { |
| 915 | memcpy(buf, &rsp->CreationTime, 32); |
| 916 | buf->AllocationSize = rsp->AllocationSize; |
| 917 | buf->EndOfFile = rsp->EndofFile; |
| 918 | buf->Attributes = rsp->FileAttributes; |
| 919 | buf->NumberOfLinks = cpu_to_le32(1); |
| 920 | buf->DeletePending = 0; |
| 921 | } |
Pavel Shilovsky | 2503a0d | 2011-12-26 22:58:46 +0400 | [diff] [blame] | 922 | creat_exit: |
| 923 | free_rsp_buf(resp_buftype, rsp); |
| 924 | return rc; |
| 925 | } |
| 926 | |
| 927 | int |
| 928 | SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, |
| 929 | u64 persistent_fid, u64 volatile_fid) |
| 930 | { |
| 931 | struct smb2_close_req *req; |
| 932 | struct smb2_close_rsp *rsp; |
| 933 | struct TCP_Server_Info *server; |
| 934 | struct cifs_ses *ses = tcon->ses; |
| 935 | struct kvec iov[1]; |
| 936 | int resp_buftype; |
| 937 | int rc = 0; |
| 938 | |
| 939 | cFYI(1, "Close"); |
| 940 | |
| 941 | if (ses && (ses->server)) |
| 942 | server = ses->server; |
| 943 | else |
| 944 | return -EIO; |
| 945 | |
| 946 | rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req); |
| 947 | if (rc) |
| 948 | return rc; |
| 949 | |
| 950 | req->PersistentFileId = persistent_fid; |
| 951 | req->VolatileFileId = volatile_fid; |
| 952 | |
| 953 | iov[0].iov_base = (char *)req; |
| 954 | /* 4 for rfc1002 length field */ |
| 955 | iov[0].iov_len = get_rfc1002_length(req) + 4; |
| 956 | |
| 957 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); |
| 958 | rsp = (struct smb2_close_rsp *)iov[0].iov_base; |
| 959 | |
| 960 | if (rc != 0) { |
| 961 | if (tcon) |
| 962 | cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); |
| 963 | goto close_exit; |
| 964 | } |
| 965 | |
| 966 | if (rsp == NULL) { |
| 967 | rc = -EIO; |
| 968 | goto close_exit; |
| 969 | } |
| 970 | |
| 971 | /* BB FIXME - decode close response, update inode for caching */ |
| 972 | |
| 973 | close_exit: |
| 974 | free_rsp_buf(resp_buftype, rsp); |
| 975 | return rc; |
| 976 | } |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 977 | |
| 978 | static int |
| 979 | validate_buf(unsigned int offset, unsigned int buffer_length, |
| 980 | struct smb2_hdr *hdr, unsigned int min_buf_size) |
| 981 | |
| 982 | { |
| 983 | unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length); |
| 984 | char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr; |
| 985 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; |
| 986 | char *end_of_buf = begin_of_buf + buffer_length; |
| 987 | |
| 988 | |
| 989 | if (buffer_length < min_buf_size) { |
| 990 | cERROR(1, "buffer length %d smaller than minimum size %d", |
| 991 | buffer_length, min_buf_size); |
| 992 | return -EINVAL; |
| 993 | } |
| 994 | |
| 995 | /* check if beyond RFC1001 maximum length */ |
| 996 | if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { |
| 997 | cERROR(1, "buffer length %d or smb length %d too large", |
| 998 | buffer_length, smb_len); |
| 999 | return -EINVAL; |
| 1000 | } |
| 1001 | |
| 1002 | if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { |
| 1003 | cERROR(1, "illegal server response, bad offset to data"); |
| 1004 | return -EINVAL; |
| 1005 | } |
| 1006 | |
| 1007 | return 0; |
| 1008 | } |
| 1009 | |
| 1010 | /* |
| 1011 | * If SMB buffer fields are valid, copy into temporary buffer to hold result. |
| 1012 | * Caller must free buffer. |
| 1013 | */ |
| 1014 | static int |
| 1015 | validate_and_copy_buf(unsigned int offset, unsigned int buffer_length, |
| 1016 | struct smb2_hdr *hdr, unsigned int minbufsize, |
| 1017 | char *data) |
| 1018 | |
| 1019 | { |
| 1020 | char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; |
| 1021 | int rc; |
| 1022 | |
| 1023 | if (!data) |
| 1024 | return -EINVAL; |
| 1025 | |
| 1026 | rc = validate_buf(offset, buffer_length, hdr, minbufsize); |
| 1027 | if (rc) |
| 1028 | return rc; |
| 1029 | |
| 1030 | memcpy(data, begin_of_buf, buffer_length); |
| 1031 | |
| 1032 | return 0; |
| 1033 | } |
| 1034 | |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 1035 | static int |
| 1036 | query_info(const unsigned int xid, struct cifs_tcon *tcon, |
| 1037 | u64 persistent_fid, u64 volatile_fid, u8 info_class, |
| 1038 | size_t output_len, size_t min_len, void *data) |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1039 | { |
| 1040 | struct smb2_query_info_req *req; |
| 1041 | struct smb2_query_info_rsp *rsp = NULL; |
| 1042 | struct kvec iov[2]; |
| 1043 | int rc = 0; |
| 1044 | int resp_buftype; |
| 1045 | struct TCP_Server_Info *server; |
| 1046 | struct cifs_ses *ses = tcon->ses; |
| 1047 | |
| 1048 | cFYI(1, "Query Info"); |
| 1049 | |
| 1050 | if (ses && (ses->server)) |
| 1051 | server = ses->server; |
| 1052 | else |
| 1053 | return -EIO; |
| 1054 | |
| 1055 | rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); |
| 1056 | if (rc) |
| 1057 | return rc; |
| 1058 | |
| 1059 | req->InfoType = SMB2_O_INFO_FILE; |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 1060 | req->FileInfoClass = info_class; |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1061 | req->PersistentFileId = persistent_fid; |
| 1062 | req->VolatileFileId = volatile_fid; |
| 1063 | /* 4 for rfc1002 length field and 1 for Buffer */ |
| 1064 | req->InputBufferOffset = |
| 1065 | cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 1066 | req->OutputBufferLength = cpu_to_le32(output_len); |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1067 | |
| 1068 | iov[0].iov_base = (char *)req; |
| 1069 | /* 4 for rfc1002 length field */ |
| 1070 | iov[0].iov_len = get_rfc1002_length(req) + 4; |
| 1071 | |
| 1072 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); |
| 1073 | if (rc) { |
| 1074 | cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); |
| 1075 | goto qinf_exit; |
| 1076 | } |
| 1077 | |
| 1078 | rsp = (struct smb2_query_info_rsp *)iov[0].iov_base; |
| 1079 | |
| 1080 | rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset), |
| 1081 | le32_to_cpu(rsp->OutputBufferLength), |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 1082 | &rsp->hdr, min_len, data); |
Pavel Shilovsky | be4cb9e | 2011-12-29 17:06:33 +0400 | [diff] [blame] | 1083 | |
| 1084 | qinf_exit: |
| 1085 | free_rsp_buf(resp_buftype, rsp); |
| 1086 | return rc; |
| 1087 | } |
Pavel Shilovsky | 9094fad | 2012-07-12 18:30:44 +0400 | [diff] [blame] | 1088 | |
Pavel Shilovsky | f0df737 | 2012-09-18 16:20:26 -0700 | [diff] [blame] | 1089 | int |
| 1090 | SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, |
| 1091 | u64 persistent_fid, u64 volatile_fid, |
| 1092 | struct smb2_file_all_info *data) |
| 1093 | { |
| 1094 | return query_info(xid, tcon, persistent_fid, volatile_fid, |
| 1095 | FILE_ALL_INFORMATION, |
| 1096 | sizeof(struct smb2_file_all_info) + MAX_NAME * 2, |
| 1097 | sizeof(struct smb2_file_all_info), data); |
| 1098 | } |
| 1099 | |
| 1100 | int |
| 1101 | SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, |
| 1102 | u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) |
| 1103 | { |
| 1104 | return query_info(xid, tcon, persistent_fid, volatile_fid, |
| 1105 | FILE_INTERNAL_INFORMATION, |
| 1106 | sizeof(struct smb2_file_internal_info), |
| 1107 | sizeof(struct smb2_file_internal_info), uniqueid); |
| 1108 | } |
| 1109 | |
Pavel Shilovsky | 9094fad | 2012-07-12 18:30:44 +0400 | [diff] [blame] | 1110 | /* |
| 1111 | * This is a no-op for now. We're not really interested in the reply, but |
| 1112 | * rather in the fact that the server sent one and that server->lstrp |
| 1113 | * gets updated. |
| 1114 | * |
| 1115 | * FIXME: maybe we should consider checking that the reply matches request? |
| 1116 | */ |
| 1117 | static void |
| 1118 | smb2_echo_callback(struct mid_q_entry *mid) |
| 1119 | { |
| 1120 | struct TCP_Server_Info *server = mid->callback_data; |
| 1121 | struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf; |
| 1122 | unsigned int credits_received = 1; |
| 1123 | |
| 1124 | if (mid->mid_state == MID_RESPONSE_RECEIVED) |
| 1125 | credits_received = le16_to_cpu(smb2->hdr.CreditRequest); |
| 1126 | |
| 1127 | DeleteMidQEntry(mid); |
| 1128 | add_credits(server, credits_received, CIFS_ECHO_OP); |
| 1129 | } |
| 1130 | |
| 1131 | int |
| 1132 | SMB2_echo(struct TCP_Server_Info *server) |
| 1133 | { |
| 1134 | struct smb2_echo_req *req; |
| 1135 | int rc = 0; |
| 1136 | struct kvec iov; |
| 1137 | |
| 1138 | cFYI(1, "In echo request"); |
| 1139 | |
| 1140 | rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req); |
| 1141 | if (rc) |
| 1142 | return rc; |
| 1143 | |
| 1144 | req->hdr.CreditRequest = cpu_to_le16(1); |
| 1145 | |
| 1146 | iov.iov_base = (char *)req; |
| 1147 | /* 4 for rfc1002 length field */ |
| 1148 | iov.iov_len = get_rfc1002_length(req) + 4; |
| 1149 | |
| 1150 | rc = cifs_call_async(server, &iov, 1, NULL, smb2_echo_callback, server, |
| 1151 | CIFS_ECHO_OP); |
| 1152 | if (rc) |
| 1153 | cFYI(1, "Echo request failed: %d", rc); |
| 1154 | |
| 1155 | cifs_small_buf_release(req); |
| 1156 | return rc; |
| 1157 | } |
Pavel Shilovsky | 7a5cfb1 | 2012-09-18 16:20:28 -0700 | [diff] [blame] | 1158 | |
| 1159 | int |
| 1160 | SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, |
| 1161 | u64 volatile_fid) |
| 1162 | { |
| 1163 | struct smb2_flush_req *req; |
| 1164 | struct TCP_Server_Info *server; |
| 1165 | struct cifs_ses *ses = tcon->ses; |
| 1166 | struct kvec iov[1]; |
| 1167 | int resp_buftype; |
| 1168 | int rc = 0; |
| 1169 | |
| 1170 | cFYI(1, "Flush"); |
| 1171 | |
| 1172 | if (ses && (ses->server)) |
| 1173 | server = ses->server; |
| 1174 | else |
| 1175 | return -EIO; |
| 1176 | |
| 1177 | rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req); |
| 1178 | if (rc) |
| 1179 | return rc; |
| 1180 | |
| 1181 | req->PersistentFileId = persistent_fid; |
| 1182 | req->VolatileFileId = volatile_fid; |
| 1183 | |
| 1184 | iov[0].iov_base = (char *)req; |
| 1185 | /* 4 for rfc1002 length field */ |
| 1186 | iov[0].iov_len = get_rfc1002_length(req) + 4; |
| 1187 | |
| 1188 | rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); |
| 1189 | |
| 1190 | if ((rc != 0) && tcon) |
| 1191 | cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); |
| 1192 | |
| 1193 | free_rsp_buf(resp_buftype, iov[0].iov_base); |
| 1194 | return rc; |
| 1195 | } |
Pavel Shilovsky | 09a4707 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1196 | |
| 1197 | /* |
| 1198 | * To form a chain of read requests, any read requests after the first should |
| 1199 | * have the end_of_chain boolean set to true. |
| 1200 | */ |
| 1201 | static int |
| 1202 | smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms, |
| 1203 | unsigned int remaining_bytes, int request_type) |
| 1204 | { |
| 1205 | int rc = -EACCES; |
| 1206 | struct smb2_read_req *req = NULL; |
| 1207 | |
| 1208 | rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req); |
| 1209 | if (rc) |
| 1210 | return rc; |
| 1211 | if (io_parms->tcon->ses->server == NULL) |
| 1212 | return -ECONNABORTED; |
| 1213 | |
| 1214 | req->hdr.ProcessId = cpu_to_le32(io_parms->pid); |
| 1215 | |
| 1216 | req->PersistentFileId = io_parms->persistent_fid; |
| 1217 | req->VolatileFileId = io_parms->volatile_fid; |
| 1218 | req->ReadChannelInfoOffset = 0; /* reserved */ |
| 1219 | req->ReadChannelInfoLength = 0; /* reserved */ |
| 1220 | req->Channel = 0; /* reserved */ |
| 1221 | req->MinimumCount = 0; |
| 1222 | req->Length = cpu_to_le32(io_parms->length); |
| 1223 | req->Offset = cpu_to_le64(io_parms->offset); |
| 1224 | |
| 1225 | if (request_type & CHAINED_REQUEST) { |
| 1226 | if (!(request_type & END_OF_CHAIN)) { |
| 1227 | /* 4 for rfc1002 length field */ |
| 1228 | req->hdr.NextCommand = |
| 1229 | cpu_to_le32(get_rfc1002_length(req) + 4); |
| 1230 | } else /* END_OF_CHAIN */ |
| 1231 | req->hdr.NextCommand = 0; |
| 1232 | if (request_type & RELATED_REQUEST) { |
| 1233 | req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS; |
| 1234 | /* |
| 1235 | * Related requests use info from previous read request |
| 1236 | * in chain. |
| 1237 | */ |
| 1238 | req->hdr.SessionId = 0xFFFFFFFF; |
| 1239 | req->hdr.TreeId = 0xFFFFFFFF; |
| 1240 | req->PersistentFileId = 0xFFFFFFFF; |
| 1241 | req->VolatileFileId = 0xFFFFFFFF; |
| 1242 | } |
| 1243 | } |
| 1244 | if (remaining_bytes > io_parms->length) |
| 1245 | req->RemainingBytes = cpu_to_le32(remaining_bytes); |
| 1246 | else |
| 1247 | req->RemainingBytes = 0; |
| 1248 | |
| 1249 | iov[0].iov_base = (char *)req; |
| 1250 | /* 4 for rfc1002 length field */ |
| 1251 | iov[0].iov_len = get_rfc1002_length(req) + 4; |
| 1252 | return rc; |
| 1253 | } |
| 1254 | |
| 1255 | static void |
| 1256 | smb2_readv_callback(struct mid_q_entry *mid) |
| 1257 | { |
| 1258 | struct cifs_readdata *rdata = mid->callback_data; |
| 1259 | struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); |
| 1260 | struct TCP_Server_Info *server = tcon->ses->server; |
| 1261 | struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov[0].iov_base; |
| 1262 | unsigned int credits_received = 1; |
| 1263 | |
| 1264 | cFYI(1, "%s: mid=%llu state=%d result=%d bytes=%u", __func__, |
| 1265 | mid->mid, mid->mid_state, rdata->result, rdata->bytes); |
| 1266 | |
| 1267 | switch (mid->mid_state) { |
| 1268 | case MID_RESPONSE_RECEIVED: |
| 1269 | credits_received = le16_to_cpu(buf->CreditRequest); |
| 1270 | /* result already set, check signature */ |
| 1271 | /* if (server->sec_mode & |
| 1272 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
| 1273 | if (smb2_verify_signature(mid->resp_buf, server)) |
| 1274 | cERROR(1, "Unexpected SMB signature"); */ |
| 1275 | /* FIXME: should this be counted toward the initiating task? */ |
| 1276 | task_io_account_read(rdata->bytes); |
| 1277 | cifs_stats_bytes_read(tcon, rdata->bytes); |
| 1278 | break; |
| 1279 | case MID_REQUEST_SUBMITTED: |
| 1280 | case MID_RETRY_NEEDED: |
| 1281 | rdata->result = -EAGAIN; |
| 1282 | break; |
| 1283 | default: |
| 1284 | if (rdata->result != -ENODATA) |
| 1285 | rdata->result = -EIO; |
| 1286 | } |
| 1287 | |
| 1288 | if (rdata->result) |
| 1289 | cifs_stats_fail_inc(tcon, SMB2_READ_HE); |
| 1290 | |
| 1291 | queue_work(cifsiod_wq, &rdata->work); |
| 1292 | DeleteMidQEntry(mid); |
| 1293 | add_credits(server, credits_received, 0); |
| 1294 | } |
| 1295 | |
| 1296 | /* smb2_async_readv - send an async write, and set up mid to handle result */ |
| 1297 | int |
| 1298 | smb2_async_readv(struct cifs_readdata *rdata) |
| 1299 | { |
| 1300 | int rc; |
| 1301 | struct smb2_hdr *buf; |
| 1302 | struct cifs_io_parms io_parms; |
| 1303 | |
| 1304 | cFYI(1, "%s: offset=%llu bytes=%u", __func__, |
| 1305 | rdata->offset, rdata->bytes); |
| 1306 | |
| 1307 | io_parms.tcon = tlink_tcon(rdata->cfile->tlink); |
| 1308 | io_parms.offset = rdata->offset; |
| 1309 | io_parms.length = rdata->bytes; |
| 1310 | io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; |
| 1311 | io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; |
| 1312 | io_parms.pid = rdata->pid; |
| 1313 | rc = smb2_new_read_req(&rdata->iov[0], &io_parms, 0, 0); |
| 1314 | if (rc) |
| 1315 | return rc; |
| 1316 | |
| 1317 | buf = (struct smb2_hdr *)rdata->iov[0].iov_base; |
| 1318 | /* 4 for rfc1002 length field */ |
| 1319 | rdata->iov[0].iov_len = get_rfc1002_length(rdata->iov[0].iov_base) + 4; |
| 1320 | |
| 1321 | kref_get(&rdata->refcount); |
| 1322 | rc = cifs_call_async(io_parms.tcon->ses->server, rdata->iov, 1, |
| 1323 | cifs_readv_receive, smb2_readv_callback, |
| 1324 | rdata, 0); |
| 1325 | if (rc) |
| 1326 | kref_put(&rdata->refcount, cifs_readdata_release); |
| 1327 | |
| 1328 | cifs_small_buf_release(buf); |
| 1329 | return rc; |
| 1330 | } |
Pavel Shilovsky | 3331914 | 2012-09-18 16:20:29 -0700 | [diff] [blame] | 1331 | |
| 1332 | /* |
| 1333 | * Check the mid_state and signature on received buffer (if any), and queue the |
| 1334 | * workqueue completion task. |
| 1335 | */ |
| 1336 | static void |
| 1337 | smb2_writev_callback(struct mid_q_entry *mid) |
| 1338 | { |
| 1339 | struct cifs_writedata *wdata = mid->callback_data; |
| 1340 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); |
| 1341 | unsigned int written; |
| 1342 | struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; |
| 1343 | unsigned int credits_received = 1; |
| 1344 | |
| 1345 | switch (mid->mid_state) { |
| 1346 | case MID_RESPONSE_RECEIVED: |
| 1347 | credits_received = le16_to_cpu(rsp->hdr.CreditRequest); |
| 1348 | wdata->result = smb2_check_receive(mid, tcon->ses->server, 0); |
| 1349 | if (wdata->result != 0) |
| 1350 | break; |
| 1351 | |
| 1352 | written = le32_to_cpu(rsp->DataLength); |
| 1353 | /* |
| 1354 | * Mask off high 16 bits when bytes written as returned |
| 1355 | * by the server is greater than bytes requested by the |
| 1356 | * client. OS/2 servers are known to set incorrect |
| 1357 | * CountHigh values. |
| 1358 | */ |
| 1359 | if (written > wdata->bytes) |
| 1360 | written &= 0xFFFF; |
| 1361 | |
| 1362 | if (written < wdata->bytes) |
| 1363 | wdata->result = -ENOSPC; |
| 1364 | else |
| 1365 | wdata->bytes = written; |
| 1366 | break; |
| 1367 | case MID_REQUEST_SUBMITTED: |
| 1368 | case MID_RETRY_NEEDED: |
| 1369 | wdata->result = -EAGAIN; |
| 1370 | break; |
| 1371 | default: |
| 1372 | wdata->result = -EIO; |
| 1373 | break; |
| 1374 | } |
| 1375 | |
| 1376 | if (wdata->result) |
| 1377 | cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
| 1378 | |
| 1379 | queue_work(cifsiod_wq, &wdata->work); |
| 1380 | DeleteMidQEntry(mid); |
| 1381 | add_credits(tcon->ses->server, credits_received, 0); |
| 1382 | } |
| 1383 | |
| 1384 | /* smb2_async_writev - send an async write, and set up mid to handle result */ |
| 1385 | int |
| 1386 | smb2_async_writev(struct cifs_writedata *wdata) |
| 1387 | { |
| 1388 | int i, rc = -EACCES; |
| 1389 | struct smb2_write_req *req = NULL; |
| 1390 | struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); |
| 1391 | struct kvec *iov = NULL; |
| 1392 | |
| 1393 | rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req); |
| 1394 | if (rc) |
| 1395 | goto async_writev_out; |
| 1396 | |
| 1397 | /* 1 iov per page + 1 for header */ |
| 1398 | iov = kzalloc((wdata->nr_pages + 1) * sizeof(*iov), GFP_NOFS); |
| 1399 | if (iov == NULL) { |
| 1400 | rc = -ENOMEM; |
| 1401 | goto async_writev_out; |
| 1402 | } |
| 1403 | |
| 1404 | req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid); |
| 1405 | |
| 1406 | req->PersistentFileId = wdata->cfile->fid.persistent_fid; |
| 1407 | req->VolatileFileId = wdata->cfile->fid.volatile_fid; |
| 1408 | req->WriteChannelInfoOffset = 0; |
| 1409 | req->WriteChannelInfoLength = 0; |
| 1410 | req->Channel = 0; |
| 1411 | req->Offset = cpu_to_le64(wdata->offset); |
| 1412 | /* 4 for rfc1002 length field */ |
| 1413 | req->DataOffset = cpu_to_le16( |
| 1414 | offsetof(struct smb2_write_req, Buffer) - 4); |
| 1415 | req->RemainingBytes = 0; |
| 1416 | |
| 1417 | /* 4 for rfc1002 length field and 1 for Buffer */ |
| 1418 | iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; |
| 1419 | iov[0].iov_base = (char *)req; |
| 1420 | |
| 1421 | /* |
| 1422 | * This function should marshal up the page array into the kvec |
| 1423 | * array, reserving [0] for the header. It should kmap the pages |
| 1424 | * and set the iov_len properly for each one. It may also set |
| 1425 | * wdata->bytes too. |
| 1426 | */ |
| 1427 | cifs_kmap_lock(); |
| 1428 | wdata->marshal_iov(iov, wdata); |
| 1429 | cifs_kmap_unlock(); |
| 1430 | |
| 1431 | cFYI(1, "async write at %llu %u bytes", wdata->offset, wdata->bytes); |
| 1432 | |
| 1433 | req->Length = cpu_to_le32(wdata->bytes); |
| 1434 | |
| 1435 | inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */); |
| 1436 | |
| 1437 | kref_get(&wdata->refcount); |
| 1438 | rc = cifs_call_async(tcon->ses->server, iov, wdata->nr_pages + 1, |
| 1439 | NULL, smb2_writev_callback, wdata, 0); |
| 1440 | |
| 1441 | if (rc) |
| 1442 | kref_put(&wdata->refcount, cifs_writedata_release); |
| 1443 | |
| 1444 | /* send is done, unmap pages */ |
| 1445 | for (i = 0; i < wdata->nr_pages; i++) |
| 1446 | kunmap(wdata->pages[i]); |
| 1447 | |
| 1448 | async_writev_out: |
| 1449 | cifs_small_buf_release(req); |
| 1450 | kfree(iov); |
| 1451 | return rc; |
| 1452 | } |