| /* |
| * fs/cifs/smb2pdu.c |
| * |
| * Copyright (C) International Business Machines Corp., 2009, 2012 |
| * Etersoft, 2012 |
| * Author(s): Steve French (sfrench@us.ibm.com) |
| * Pavel Shilovsky (pshilovsky@samba.org) 2012 |
| * |
| * Contains the routines for constructing the SMB2 PDUs themselves |
| * |
| * This library is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Lesser General Public License as published |
| * by the Free Software Foundation; either version 2.1 of the License, or |
| * (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public License |
| * along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| /* SMB2 PDU handling routines here - except for leftovers (eg session setup) */ |
| /* Note that there are handle based routines which must be */ |
| /* treated slightly differently for reconnection purposes since we never */ |
| /* want to reuse a stale file handle and only the caller knows the file info */ |
| |
| #include <linux/fs.h> |
| #include <linux/kernel.h> |
| #include <linux/vfs.h> |
| #include <linux/task_io_accounting_ops.h> |
| #include <linux/uaccess.h> |
| #include <linux/pagemap.h> |
| #include <linux/xattr.h> |
| #include "smb2pdu.h" |
| #include "cifsglob.h" |
| #include "cifsacl.h" |
| #include "cifsproto.h" |
| #include "smb2proto.h" |
| #include "cifs_unicode.h" |
| #include "cifs_debug.h" |
| #include "ntlmssp.h" |
| #include "smb2status.h" |
| #include "smb2glob.h" |
| #include "cifspdu.h" |
| |
| /* |
| * The following table defines the expected "StructureSize" of SMB2 requests |
| * in order by SMB2 command. This is similar to "wct" in SMB/CIFS requests. |
| * |
| * Note that commands are defined in smb2pdu.h in le16 but the array below is |
| * indexed by command in host byte order. |
| */ |
| static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = { |
| /* SMB2_NEGOTIATE */ 36, |
| /* SMB2_SESSION_SETUP */ 25, |
| /* SMB2_LOGOFF */ 4, |
| /* SMB2_TREE_CONNECT */ 9, |
| /* SMB2_TREE_DISCONNECT */ 4, |
| /* SMB2_CREATE */ 57, |
| /* SMB2_CLOSE */ 24, |
| /* SMB2_FLUSH */ 24, |
| /* SMB2_READ */ 49, |
| /* SMB2_WRITE */ 49, |
| /* SMB2_LOCK */ 48, |
| /* SMB2_IOCTL */ 57, |
| /* SMB2_CANCEL */ 4, |
| /* SMB2_ECHO */ 4, |
| /* SMB2_QUERY_DIRECTORY */ 33, |
| /* SMB2_CHANGE_NOTIFY */ 32, |
| /* SMB2_QUERY_INFO */ 41, |
| /* SMB2_SET_INFO */ 33, |
| /* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */ |
| }; |
| |
| |
| static void |
| smb2_hdr_assemble(struct smb2_hdr *hdr, __le16 smb2_cmd /* command */ , |
| const struct cifs_tcon *tcon) |
| { |
| struct smb2_pdu *pdu = (struct smb2_pdu *)hdr; |
| char *temp = (char *)hdr; |
| /* lookup word count ie StructureSize from table */ |
| __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_cmd)]; |
| |
| /* |
| * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of |
| * largest operations (Create) |
| */ |
| memset(temp, 0, 256); |
| |
| /* Note this is only network field converted to big endian */ |
| hdr->smb2_buf_length = cpu_to_be32(parmsize + sizeof(struct smb2_hdr) |
| - 4 /* RFC 1001 length field itself not counted */); |
| |
| hdr->ProtocolId[0] = 0xFE; |
| hdr->ProtocolId[1] = 'S'; |
| hdr->ProtocolId[2] = 'M'; |
| hdr->ProtocolId[3] = 'B'; |
| hdr->StructureSize = cpu_to_le16(64); |
| hdr->Command = smb2_cmd; |
| hdr->CreditRequest = cpu_to_le16(2); /* BB make this dynamic */ |
| hdr->ProcessId = cpu_to_le32((__u16)current->tgid); |
| |
| if (!tcon) |
| goto out; |
| |
| hdr->TreeId = tcon->tid; |
| /* Uid is not converted */ |
| if (tcon->ses) |
| hdr->SessionId = tcon->ses->Suid; |
| /* BB check following DFS flags BB */ |
| /* BB do we have to add check for SHI1005_FLAGS_DFS_ROOT too? */ |
| if (tcon->share_flags & SHI1005_FLAGS_DFS) |
| hdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; |
| /* BB how does SMB2 do case sensitive? */ |
| /* if (tcon->nocase) |
| hdr->Flags |= SMBFLG_CASELESS; */ |
| if (tcon->ses && tcon->ses->server && tcon->ses->server->sign) |
| hdr->Flags |= SMB2_FLAGS_SIGNED; |
| out: |
| pdu->StructureSize2 = cpu_to_le16(parmsize); |
| return; |
| } |
| |
| static int |
| smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon) |
| { |
| int rc = 0; |
| struct nls_table *nls_codepage; |
| struct cifs_ses *ses; |
| struct TCP_Server_Info *server; |
| |
| /* |
| * SMB2s NegProt, SessSetup, Logoff do not have tcon yet so |
| * check for tcp and smb session status done differently |
| * for those three - in the calling routine. |
| */ |
| if (tcon == NULL) |
| return rc; |
| |
| if (smb2_command == SMB2_TREE_CONNECT) |
| return rc; |
| |
| if (tcon->tidStatus == CifsExiting) { |
| /* |
| * only tree disconnect, open, and write, |
| * (and ulogoff which does not have tcon) |
| * are allowed as we start force umount. |
| */ |
| if ((smb2_command != SMB2_WRITE) && |
| (smb2_command != SMB2_CREATE) && |
| (smb2_command != SMB2_TREE_DISCONNECT)) { |
| cifs_dbg(FYI, "can not send cmd %d while umounting\n", |
| smb2_command); |
| return -ENODEV; |
| } |
| } |
| if ((!tcon->ses) || (tcon->ses->status == CifsExiting) || |
| (!tcon->ses->server)) |
| return -EIO; |
| |
| ses = tcon->ses; |
| server = ses->server; |
| |
| /* |
| * Give demultiplex thread up to 10 seconds to reconnect, should be |
| * greater than cifs socket timeout which is 7 seconds |
| */ |
| while (server->tcpStatus == CifsNeedReconnect) { |
| /* |
| * Return to caller for TREE_DISCONNECT and LOGOFF and CLOSE |
| * here since they are implicitly done when session drops. |
| */ |
| switch (smb2_command) { |
| /* |
| * BB Should we keep oplock break and add flush to exceptions? |
| */ |
| case SMB2_TREE_DISCONNECT: |
| case SMB2_CANCEL: |
| case SMB2_CLOSE: |
| case SMB2_OPLOCK_BREAK: |
| return -EAGAIN; |
| } |
| |
| wait_event_interruptible_timeout(server->response_q, |
| (server->tcpStatus != CifsNeedReconnect), 10 * HZ); |
| |
| /* are we still trying to reconnect? */ |
| if (server->tcpStatus != CifsNeedReconnect) |
| break; |
| |
| /* |
| * on "soft" mounts we wait once. Hard mounts keep |
| * retrying until process is killed or server comes |
| * back on-line |
| */ |
| if (!tcon->retry) { |
| cifs_dbg(FYI, "gave up waiting on reconnect in smb_init\n"); |
| return -EHOSTDOWN; |
| } |
| } |
| |
| if (!tcon->ses->need_reconnect && !tcon->need_reconnect) |
| return rc; |
| |
| nls_codepage = load_nls_default(); |
| |
| /* |
| * need to prevent multiple threads trying to simultaneously reconnect |
| * the same SMB session |
| */ |
| mutex_lock(&tcon->ses->session_mutex); |
| rc = cifs_negotiate_protocol(0, tcon->ses); |
| if (!rc && tcon->ses->need_reconnect) |
| rc = cifs_setup_session(0, tcon->ses, nls_codepage); |
| |
| if (rc || !tcon->need_reconnect) { |
| mutex_unlock(&tcon->ses->session_mutex); |
| goto out; |
| } |
| |
| cifs_mark_open_files_invalid(tcon); |
| rc = SMB2_tcon(0, tcon->ses, tcon->treeName, tcon, nls_codepage); |
| mutex_unlock(&tcon->ses->session_mutex); |
| cifs_dbg(FYI, "reconnect tcon rc = %d\n", rc); |
| if (rc) |
| goto out; |
| atomic_inc(&tconInfoReconnectCount); |
| /* |
| * BB FIXME add code to check if wsize needs update due to negotiated |
| * smb buffer size shrinking. |
| */ |
| out: |
| /* |
| * Check if handle based operation so we know whether we can continue |
| * or not without returning to caller to reset file handle. |
| */ |
| /* |
| * BB Is flush done by server on drop of tcp session? Should we special |
| * case it and skip above? |
| */ |
| switch (smb2_command) { |
| case SMB2_FLUSH: |
| case SMB2_READ: |
| case SMB2_WRITE: |
| case SMB2_LOCK: |
| case SMB2_IOCTL: |
| case SMB2_QUERY_DIRECTORY: |
| case SMB2_CHANGE_NOTIFY: |
| case SMB2_QUERY_INFO: |
| case SMB2_SET_INFO: |
| return -EAGAIN; |
| } |
| unload_nls(nls_codepage); |
| return rc; |
| } |
| |
| /* |
| * Allocate and return pointer to an SMB request hdr, and set basic |
| * SMB information in the SMB header. If the return code is zero, this |
| * function must have filled in request_buf pointer. |
| */ |
| static int |
| small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon, |
| void **request_buf) |
| { |
| int rc = 0; |
| |
| rc = smb2_reconnect(smb2_command, tcon); |
| if (rc) |
| return rc; |
| |
| /* BB eventually switch this to SMB2 specific small buf size */ |
| *request_buf = cifs_small_buf_get(); |
| if (*request_buf == NULL) { |
| /* BB should we add a retry in here if not a writepage? */ |
| return -ENOMEM; |
| } |
| |
| smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon); |
| |
| if (tcon != NULL) { |
| #ifdef CONFIG_CIFS_STATS2 |
| uint16_t com_code = le16_to_cpu(smb2_command); |
| cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]); |
| #endif |
| cifs_stats_inc(&tcon->num_smbs_sent); |
| } |
| |
| return rc; |
| } |
| |
| static void |
| free_rsp_buf(int resp_buftype, void *rsp) |
| { |
| if (resp_buftype == CIFS_SMALL_BUFFER) |
| cifs_small_buf_release(rsp); |
| else if (resp_buftype == CIFS_LARGE_BUFFER) |
| cifs_buf_release(rsp); |
| } |
| |
| |
| /* |
| * |
| * SMB2 Worker functions follow: |
| * |
| * The general structure of the worker functions is: |
| * 1) Call smb2_init (assembles SMB2 header) |
| * 2) Initialize SMB2 command specific fields in fixed length area of SMB |
| * 3) Call smb_sendrcv2 (sends request on socket and waits for response) |
| * 4) Decode SMB2 command specific fields in the fixed length area |
| * 5) Decode variable length data area (if any for this SMB2 command type) |
| * 6) Call free smb buffer |
| * 7) return |
| * |
| */ |
| |
| int |
| SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses) |
| { |
| struct smb2_negotiate_req *req; |
| struct smb2_negotiate_rsp *rsp; |
| struct kvec iov[1]; |
| int rc = 0; |
| int resp_buftype; |
| struct TCP_Server_Info *server = ses->server; |
| int blob_offset, blob_length; |
| char *security_blob; |
| int flags = CIFS_NEG_OP; |
| |
| cifs_dbg(FYI, "Negotiate protocol\n"); |
| |
| if (!server) { |
| WARN(1, "%s: server is NULL!\n", __func__); |
| return -EIO; |
| } |
| |
| rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req); |
| if (rc) |
| return rc; |
| |
| req->hdr.SessionId = 0; |
| |
| req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id); |
| |
| req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */ |
| inc_rfc1001_len(req, 2); |
| |
| /* only one of SMB2 signing flags may be set in SMB2 request */ |
| if (ses->sign) |
| req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; |
| else if (global_secflags & CIFSSEC_MAY_SIGN) |
| req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; |
| else |
| req->SecurityMode = 0; |
| |
| req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities); |
| |
| memcpy(req->ClientGUID, cifs_client_guid, SMB2_CLIENT_GUID_SIZE); |
| |
| iov[0].iov_base = (char *)req; |
| /* 4 for rfc1002 length field */ |
| iov[0].iov_len = get_rfc1002_length(req) + 4; |
| |
| rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, flags); |
| |
| rsp = (struct smb2_negotiate_rsp *)iov[0].iov_base; |
| /* |
| * No tcon so can't do |
| * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); |
| */ |
| if (rc != 0) |
| goto neg_exit; |
| |
| cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode); |
| |
| /* BB we may eventually want to match the negotiated vs. requested |
| dialect, even though we are only requesting one at a time */ |
| if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) |
| cifs_dbg(FYI, "negotiated smb2.0 dialect\n"); |
| else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) |
| cifs_dbg(FYI, "negotiated smb2.1 dialect\n"); |
| else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID)) |
| cifs_dbg(FYI, "negotiated smb3.0 dialect\n"); |
| else { |
| cifs_dbg(VFS, "Illegal dialect returned by server %d\n", |
| le16_to_cpu(rsp->DialectRevision)); |
| rc = -EIO; |
| goto neg_exit; |
| } |
| server->dialect = le16_to_cpu(rsp->DialectRevision); |
| |
| /* SMB2 only has an extended negflavor */ |
| server->negflavor = CIFS_NEGFLAVOR_EXTENDED; |
| server->maxBuf = le32_to_cpu(rsp->MaxTransactSize); |
| server->max_read = le32_to_cpu(rsp->MaxReadSize); |
| server->max_write = le32_to_cpu(rsp->MaxWriteSize); |
| /* BB Do we need to validate the SecurityMode? */ |
| server->sec_mode = le16_to_cpu(rsp->SecurityMode); |
| server->capabilities = le32_to_cpu(rsp->Capabilities); |
| /* Internal types */ |
| server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES; |
| |
| security_blob = smb2_get_data_area_len(&blob_offset, &blob_length, |
| &rsp->hdr); |
| if (blob_length == 0) { |
| cifs_dbg(VFS, "missing security blob on negprot\n"); |
| rc = -EIO; |
| goto neg_exit; |
| } |
| |
| rc = cifs_enable_signing(server, ses->sign); |
| #ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */ |
| if (rc) |
| goto neg_exit; |
| |
| rc = decode_neg_token_init(security_blob, blob_length, |
| &server->sec_type); |
| if (rc == 1) |
| rc = 0; |
| else if (rc == 0) { |
| rc = -EIO; |
| goto neg_exit; |
| } |
| #endif |
| |
| neg_exit: |
| free_rsp_buf(resp_buftype, rsp); |
| return rc; |
| } |
| |
| int |
| SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses, |
| const struct nls_table *nls_cp) |
| { |
| struct smb2_sess_setup_req *req; |
| struct smb2_sess_setup_rsp *rsp = NULL; |
| struct kvec iov[2]; |
| int rc = 0; |
| int resp_buftype; |
| __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ |
| struct TCP_Server_Info *server = ses->server; |
| u16 blob_length = 0; |
| char *security_blob; |
| char *ntlmssp_blob = NULL; |
| bool use_spnego = false; /* else use raw ntlmssp */ |
| |
| cifs_dbg(FYI, "Session Setup\n"); |
| |
| if (!server) { |
| WARN(1, "%s: server is NULL!\n", __func__); |
| return -EIO; |
| } |
| |
| /* |
| * If memory allocation is successful, caller of this function |
| * frees it. |
| */ |
| ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL); |
| if (!ses->ntlmssp) |
| return -ENOMEM; |
| |
| /* FIXME: allow for other auth types besides NTLMSSP (e.g. krb5) */ |
| ses->sectype = RawNTLMSSP; |
| |
| ssetup_ntlmssp_authenticate: |
| if (phase == NtLmChallenge) |
| phase = NtLmAuthenticate; /* if ntlmssp, now final phase */ |
| |
| rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req); |
| if (rc) |
| return rc; |
| |
| req->hdr.SessionId = 0; /* First session, not a reauthenticate */ |
| req->VcNumber = 0; /* MBZ */ |
| /* to enable echos and oplocks */ |
| req->hdr.CreditRequest = cpu_to_le16(3); |
| |
| /* only one of SMB2 signing flags may be set in SMB2 request */ |
| if (server->sign) |
| req->SecurityMode = SMB2_NEGOTIATE_SIGNING_REQUIRED; |
| else if (global_secflags & CIFSSEC_MAY_SIGN) /* one flag unlike MUST_ */ |
| req->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED; |
| else |
| req->SecurityMode = 0; |
| |
| req->Capabilities = 0; |
| req->Channel = 0; /* MBZ */ |
| |
| iov[0].iov_base = (char *)req; |
| /* 4 for rfc1002 length field and 1 for pad */ |
| iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; |
| if (phase == NtLmNegotiate) { |
| ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE), |
| GFP_KERNEL); |
| if (ntlmssp_blob == NULL) { |
| rc = -ENOMEM; |
| goto ssetup_exit; |
| } |
| build_ntlmssp_negotiate_blob(ntlmssp_blob, ses); |
| if (use_spnego) { |
| /* blob_length = build_spnego_ntlmssp_blob( |
| &security_blob, |
| sizeof(struct _NEGOTIATE_MESSAGE), |
| ntlmssp_blob); */ |
| /* BB eventually need to add this */ |
| cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
| rc = -EOPNOTSUPP; |
| kfree(ntlmssp_blob); |
| goto ssetup_exit; |
| } else { |
| blob_length = sizeof(struct _NEGOTIATE_MESSAGE); |
| /* with raw NTLMSSP we don't encapsulate in SPNEGO */ |
| security_blob = ntlmssp_blob; |
| } |
| } else if (phase == NtLmAuthenticate) { |
| req->hdr.SessionId = ses->Suid; |
| ntlmssp_blob = kzalloc(sizeof(struct _NEGOTIATE_MESSAGE) + 500, |
| GFP_KERNEL); |
| if (ntlmssp_blob == NULL) { |
| rc = -ENOMEM; |
| goto ssetup_exit; |
| } |
| rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses, |
| nls_cp); |
| if (rc) { |
| cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", |
| rc); |
| goto ssetup_exit; /* BB double check error handling */ |
| } |
| if (use_spnego) { |
| /* blob_length = build_spnego_ntlmssp_blob( |
| &security_blob, |
| blob_length, |
| ntlmssp_blob); */ |
| cifs_dbg(VFS, "spnego not supported for SMB2 yet\n"); |
| rc = -EOPNOTSUPP; |
| kfree(ntlmssp_blob); |
| goto ssetup_exit; |
| } else { |
| security_blob = ntlmssp_blob; |
| } |
| } else { |
| cifs_dbg(VFS, "illegal ntlmssp phase\n"); |
| rc = -EIO; |
| goto ssetup_exit; |
| } |
| |
| /* Testing shows that buffer offset must be at location of Buffer[0] */ |
| req->SecurityBufferOffset = |
| cpu_to_le16(sizeof(struct smb2_sess_setup_req) - |
| 1 /* pad */ - 4 /* rfc1001 len */); |
| req->SecurityBufferLength = cpu_to_le16(blob_length); |
| iov[1].iov_base = security_blob; |
| iov[1].iov_len = blob_length; |
| |
| inc_rfc1001_len(req, blob_length - 1 /* pad */); |
| |
| /* BB add code to build os and lm fields */ |
| |
| rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, |
| CIFS_LOG_ERROR | CIFS_NEG_OP); |
| |
| kfree(security_blob); |
| rsp = (struct smb2_sess_setup_rsp *)iov[0].iov_base; |
| if (resp_buftype != CIFS_NO_BUFFER && |
| rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED) { |
| if (phase != NtLmNegotiate) { |
| cifs_dbg(VFS, "Unexpected more processing error\n"); |
| goto ssetup_exit; |
| } |
| if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 != |
| le16_to_cpu(rsp->SecurityBufferOffset)) { |
| cifs_dbg(VFS, "Invalid security buffer offset %d\n", |
| le16_to_cpu(rsp->SecurityBufferOffset)); |
| rc = -EIO; |
| goto ssetup_exit; |
| } |
| |
| /* NTLMSSP Negotiate sent now processing challenge (response) */ |
| phase = NtLmChallenge; /* process ntlmssp challenge */ |
| rc = 0; /* MORE_PROCESSING is not an error here but expected */ |
| ses->Suid = rsp->hdr.SessionId; |
| rc = decode_ntlmssp_challenge(rsp->Buffer, |
| le16_to_cpu(rsp->SecurityBufferLength), ses); |
| } |
| |
| /* |
| * BB eventually add code for SPNEGO decoding of NtlmChallenge blob, |
| * but at least the raw NTLMSSP case works. |
| */ |
| /* |
| * No tcon so can't do |
| * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); |
| */ |
| if (rc != 0) |
| goto ssetup_exit; |
| |
| ses->session_flags = le16_to_cpu(rsp->SessionFlags); |
| ssetup_exit: |
| free_rsp_buf(resp_buftype, rsp); |
| |
| /* if ntlmssp, and negotiate succeeded, proceed to authenticate phase */ |
| if ((phase == NtLmChallenge) && (rc == 0)) |
| goto ssetup_ntlmssp_authenticate; |
| return rc; |
| } |
| |
| int |
| SMB2_logoff(const unsigned int xid, struct cifs_ses *ses) |
| { |
| struct smb2_logoff_req *req; /* response is also trivial struct */ |
| int rc = 0; |
| struct TCP_Server_Info *server; |
| |
| cifs_dbg(FYI, "disconnect session %p\n", ses); |
| |
| if (ses && (ses->server)) |
| server = ses->server; |
| else |
| return -EIO; |
| |
| rc = small_smb2_init(SMB2_LOGOFF, NULL, (void **) &req); |
| if (rc) |
| return rc; |
| |
| /* since no tcon, smb2_init can not do this, so do here */ |
| req->hdr.SessionId = ses->Suid; |
| if (server->sign) |
| req->hdr.Flags |= SMB2_FLAGS_SIGNED; |
| |
| rc = SendReceiveNoRsp(xid, ses, (char *) &req->hdr, 0); |
| /* |
| * No tcon so can't do |
| * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]); |
| */ |
| return rc; |
| } |
| |
| static inline void cifs_stats_fail_inc(struct cifs_tcon *tcon, uint16_t code) |
| { |
| cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_failed[code]); |
| } |
| |
| #define MAX_SHARENAME_LENGTH (255 /* server */ + 80 /* share */ + 1 /* NULL */) |
| |
| int |
| SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, |
| struct cifs_tcon *tcon, const struct nls_table *cp) |
| { |
| struct smb2_tree_connect_req *req; |
| struct smb2_tree_connect_rsp *rsp = NULL; |
| struct kvec iov[2]; |
| int rc = 0; |
| int resp_buftype; |
| int unc_path_len; |
| struct TCP_Server_Info *server; |
| __le16 *unc_path = NULL; |
| |
| cifs_dbg(FYI, "TCON\n"); |
| |
| if ((ses->server) && tree) |
| server = ses->server; |
| else |
| return -EIO; |
| |
| if (tcon && tcon->bad_network_name) |
| return -ENOENT; |
| |
| unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL); |
| if (unc_path == NULL) |
| return -ENOMEM; |
| |
| unc_path_len = cifs_strtoUTF16(unc_path, tree, strlen(tree), cp) + 1; |
| unc_path_len *= 2; |
| if (unc_path_len < 2) { |
| kfree(unc_path); |
| return -EINVAL; |
| } |
| |
| rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req); |
| if (rc) { |
| kfree(unc_path); |
| return rc; |
| } |
| |
| if (tcon == NULL) { |
| /* since no tcon, smb2_init can not do this, so do here */ |
| req->hdr.SessionId = ses->Suid; |
| /* if (ses->server->sec_mode & SECMODE_SIGN_REQUIRED) |
| req->hdr.Flags |= SMB2_FLAGS_SIGNED; */ |
| } |
| |
| iov[0].iov_base = (char *)req; |
| /* 4 for rfc1002 length field and 1 for pad */ |
| iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; |
| |
| /* Testing shows that buffer offset must be at location of Buffer[0] */ |
| req->PathOffset = cpu_to_le16(sizeof(struct smb2_tree_connect_req) |
| - 1 /* pad */ - 4 /* do not count rfc1001 len field */); |
| req->PathLength = cpu_to_le16(unc_path_len - 2); |
| iov[1].iov_base = unc_path; |
| iov[1].iov_len = unc_path_len; |
| |
| inc_rfc1001_len(req, unc_path_len - 1 /* pad */); |
| |
| rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); |
| rsp = (struct smb2_tree_connect_rsp *)iov[0].iov_base; |
| |
| if (rc != 0) { |
| if (tcon) { |
| cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE); |
| tcon->need_reconnect = true; |
| } |
| goto tcon_error_exit; |
| } |
| |
| if (tcon == NULL) { |
| ses->ipc_tid = rsp->hdr.TreeId; |
| goto tcon_exit; |
| } |
| |
| if (rsp->ShareType & SMB2_SHARE_TYPE_DISK) |
| cifs_dbg(FYI, "connection to disk share\n"); |
| else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) { |
| tcon->ipc = true; |
| cifs_dbg(FYI, "connection to pipe share\n"); |
| } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) { |
| tcon->print = true; |
| cifs_dbg(FYI, "connection to printer\n"); |
| } else { |
| cifs_dbg(VFS, "unknown share type %d\n", rsp->ShareType); |
| rc = -EOPNOTSUPP; |
| goto tcon_error_exit; |
| } |
| |
| tcon->share_flags = le32_to_cpu(rsp->ShareFlags); |
| tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess); |
| tcon->tidStatus = CifsGood; |
| tcon->need_reconnect = false; |
| tcon->tid = rsp->hdr.TreeId; |
| strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
| |
| if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) && |
| ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0)) |
| cifs_dbg(VFS, "DFS capability contradicts DFS flag\n"); |
| |
| tcon_exit: |
| free_rsp_buf(resp_buftype, rsp); |
| kfree(unc_path); |
| return rc; |
| |
| tcon_error_exit: |
| if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) { |
| cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree); |
| tcon->bad_network_name = true; |
| } |
| goto tcon_exit; |
| } |
| |
| int |
| SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon) |
| { |
| struct smb2_tree_disconnect_req *req; /* response is trivial */ |
| int rc = 0; |
| struct TCP_Server_Info *server; |
| struct cifs_ses *ses = tcon->ses; |
| |
| cifs_dbg(FYI, "Tree Disconnect\n"); |
| |
| if (ses && (ses->server)) |
| server = ses->server; |
| else |
| return -EIO; |
| |
| if ((tcon->need_reconnect) || (tcon->ses->need_reconnect)) |
| return 0; |
| |
| rc = small_smb2_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req); |
| if (rc) |
| return rc; |
| |
| rc = SendReceiveNoRsp(xid, ses, (char *)&req->hdr, 0); |
| if (rc) |
| cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE); |
| |
| return rc; |
| } |
| |
| static struct create_lease * |
| create_lease_buf(u8 *lease_key, u8 oplock) |
| { |
| struct create_lease *buf; |
| |
| buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); |
| if (!buf) |
| return NULL; |
| |
| buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key)); |
| buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8))); |
| if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) |
| buf->lcontext.LeaseState = SMB2_LEASE_WRITE_CACHING | |
| SMB2_LEASE_READ_CACHING; |
| else if (oplock == SMB2_OPLOCK_LEVEL_II) |
| buf->lcontext.LeaseState = SMB2_LEASE_READ_CACHING; |
| else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) |
| buf->lcontext.LeaseState = SMB2_LEASE_HANDLE_CACHING | |
| SMB2_LEASE_READ_CACHING | |
| SMB2_LEASE_WRITE_CACHING; |
| |
| buf->ccontext.DataOffset = cpu_to_le16(offsetof |
| (struct create_lease, lcontext)); |
| buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); |
| buf->ccontext.NameOffset = cpu_to_le16(offsetof |
| (struct create_lease, Name)); |
| buf->ccontext.NameLength = cpu_to_le16(4); |
| buf->Name[0] = 'R'; |
| buf->Name[1] = 'q'; |
| buf->Name[2] = 'L'; |
| buf->Name[3] = 's'; |
| return buf; |
| } |
| |
| static __u8 |
| parse_lease_state(struct smb2_create_rsp *rsp) |
| { |
| char *data_offset; |
| struct create_lease *lc; |
| bool found = false; |
| |
| data_offset = (char *)rsp; |
| data_offset += 4 + le32_to_cpu(rsp->CreateContextsOffset); |
| lc = (struct create_lease *)data_offset; |
| do { |
| char *name = le16_to_cpu(lc->ccontext.NameOffset) + (char *)lc; |
| if (le16_to_cpu(lc->ccontext.NameLength) != 4 || |
| strncmp(name, "RqLs", 4)) { |
| lc = (struct create_lease *)((char *)lc |
| + le32_to_cpu(lc->ccontext.Next)); |
| continue; |
| } |
| if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS) |
| return SMB2_OPLOCK_LEVEL_NOCHANGE; |
| found = true; |
| break; |
| } while (le32_to_cpu(lc->ccontext.Next) != 0); |
| |
| if (!found) |
| return 0; |
| |
| return smb2_map_lease_to_oplock(lc->lcontext.LeaseState); |
| } |
| |
| int |
| SMB2_open(const unsigned int xid, struct cifs_tcon *tcon, __le16 *path, |
| u64 *persistent_fid, u64 *volatile_fid, __u32 desired_access, |
| __u32 create_disposition, __u32 file_attributes, __u32 create_options, |
| __u8 *oplock, struct smb2_file_all_info *buf) |
| { |
| struct smb2_create_req *req; |
| struct smb2_create_rsp *rsp; |
| struct TCP_Server_Info *server; |
| struct cifs_ses *ses = tcon->ses; |
| struct kvec iov[3]; |
| int resp_buftype; |
| int uni_path_len; |
| __le16 *copy_path = NULL; |
| int copy_size; |
| int rc = 0; |
| int num_iovecs = 2; |
| |
| cifs_dbg(FYI, "create/open\n"); |
| |
| if (ses && (ses->server)) |
| server = ses->server; |
| else |
| return -EIO; |
| |
| rc = small_smb2_init(SMB2_CREATE, tcon, (void **) &req); |
| if (rc) |
| return rc; |
| |
| req->ImpersonationLevel = IL_IMPERSONATION; |
| req->DesiredAccess = cpu_to_le32(desired_access); |
| /* File attributes ignored on open (used in create though) */ |
| req->FileAttributes = cpu_to_le32(file_attributes); |
| req->ShareAccess = FILE_SHARE_ALL_LE; |
| req->CreateDisposition = cpu_to_le32(create_disposition); |
| req->CreateOptions = cpu_to_le32(create_options); |
| uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2; |
| req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) |
| - 8 /* pad */ - 4 /* do not count rfc1001 len field */); |
| |
| iov[0].iov_base = (char *)req; |
| /* 4 for rfc1002 length field */ |
| iov[0].iov_len = get_rfc1002_length(req) + 4; |
| |
| /* MUST set path len (NameLength) to 0 opening root of share */ |
| if (uni_path_len >= 4) { |
| req->NameLength = cpu_to_le16(uni_path_len - 2); |
| /* -1 since last byte is buf[0] which is sent below (path) */ |
| iov[0].iov_len--; |
| if (uni_path_len % 8 != 0) { |
| copy_size = uni_path_len / 8 * 8; |
| if (copy_size < uni_path_len) |
| copy_size += 8; |
| |
| copy_path = kzalloc(copy_size, GFP_KERNEL); |
| if (!copy_path) |
| return -ENOMEM; |
| memcpy((char *)copy_path, (const char *)path, |
| uni_path_len); |
| uni_path_len = copy_size; |
| path = copy_path; |
| } |
| |
| iov[1].iov_len = uni_path_len; |
| iov[1].iov_base = path; |
| /* |
| * -1 since last byte is buf[0] which was counted in |
| * smb2_buf_len. |
| */ |
| inc_rfc1001_len(req, uni_path_len - 1); |
| } else { |
| iov[0].iov_len += 7; |
| req->hdr.smb2_buf_length = cpu_to_be32(be32_to_cpu( |
| req->hdr.smb2_buf_length) + 8 - 1); |
| num_iovecs = 1; |
| req->NameLength = 0; |
| } |
| |
| if (!server->oplocks) |
| *oplock = SMB2_OPLOCK_LEVEL_NONE; |
| |
| if (!(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) || |
| *oplock == SMB2_OPLOCK_LEVEL_NONE) |
| req->RequestedOplockLevel = *oplock; |
| else { |
| iov[num_iovecs].iov_base = create_lease_buf(oplock+1, *oplock); |
| if (iov[num_iovecs].iov_base == NULL) { |
| cifs_small_buf_release(req); |
| kfree(copy_path); |
| return -ENOMEM; |
| } |
| iov[num_iovecs].iov_len = sizeof(struct create_lease); |
| req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE; |
| req->CreateContextsOffset = cpu_to_le32( |
| sizeof(struct smb2_create_req) - 4 - 8 + |
| iov[num_iovecs-1].iov_len); |
| req->CreateContextsLength = cpu_to_le32( |
| sizeof(struct create_lease)); |
| inc_rfc1001_len(&req->hdr, sizeof(struct create_lease)); |
| num_iovecs++; |
| } |
| |
| rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buftype, 0); |
| rsp = (struct smb2_create_rsp *)iov[0].iov_base; |
| |
| if (rc != 0) { |
| cifs_stats_fail_inc(tcon, SMB2_CREATE_HE); |
| goto creat_exit; |
| } |
| |
| *persistent_fid = rsp->PersistentFileId; |
| *volatile_fid = rsp->VolatileFileId; |
| |
| if (buf) { |
| memcpy(buf, &rsp->CreationTime, 32); |
| buf->AllocationSize = rsp->AllocationSize; |
| buf->EndOfFile = rsp->EndofFile; |
| buf->Attributes = rsp->FileAttributes; |
| buf->NumberOfLinks = cpu_to_le32(1); |
| buf->DeletePending = 0; |
| } |
| |
| if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) |
| *oplock = parse_lease_state(rsp); |
| else |
| *oplock = rsp->OplockLevel; |
| creat_exit: |
| kfree(copy_path); |
| free_rsp_buf(resp_buftype, rsp); |
| return rc; |
| } |
| |
| int |
| SMB2_close(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid) |
| { |
| struct smb2_close_req *req; |
| struct smb2_close_rsp *rsp; |
| struct TCP_Server_Info *server; |
| struct cifs_ses *ses = tcon->ses; |
| struct kvec iov[1]; |
| int resp_buftype; |
| int rc = 0; |
| |
| cifs_dbg(FYI, "Close\n"); |
| |
| if (ses && (ses->server)) |
| server = ses->server; |
| else |
| return -EIO; |
| |
| rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req); |
| if (rc) |
| return rc; |
| |
| req->PersistentFileId = persistent_fid; |
| req->VolatileFileId = volatile_fid; |
| |
| iov[0].iov_base = (char *)req; |
| /* 4 for rfc1002 length field */ |
| iov[0].iov_len = get_rfc1002_length(req) + 4; |
| |
| rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); |
| rsp = (struct smb2_close_rsp *)iov[0].iov_base; |
| |
| if (rc != 0) { |
| if (tcon) |
| cifs_stats_fail_inc(tcon, SMB2_CLOSE_HE); |
| goto close_exit; |
| } |
| |
| /* BB FIXME - decode close response, update inode for caching */ |
| |
| close_exit: |
| free_rsp_buf(resp_buftype, rsp); |
| return rc; |
| } |
| |
| static int |
| validate_buf(unsigned int offset, unsigned int buffer_length, |
| struct smb2_hdr *hdr, unsigned int min_buf_size) |
| |
| { |
| unsigned int smb_len = be32_to_cpu(hdr->smb2_buf_length); |
| char *end_of_smb = smb_len + 4 /* RFC1001 length field */ + (char *)hdr; |
| char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; |
| char *end_of_buf = begin_of_buf + buffer_length; |
| |
| |
| if (buffer_length < min_buf_size) { |
| cifs_dbg(VFS, "buffer length %d smaller than minimum size %d\n", |
| buffer_length, min_buf_size); |
| return -EINVAL; |
| } |
| |
| /* check if beyond RFC1001 maximum length */ |
| if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) { |
| cifs_dbg(VFS, "buffer length %d or smb length %d too large\n", |
| buffer_length, smb_len); |
| return -EINVAL; |
| } |
| |
| if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) { |
| cifs_dbg(VFS, "illegal server response, bad offset to data\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * If SMB buffer fields are valid, copy into temporary buffer to hold result. |
| * Caller must free buffer. |
| */ |
| static int |
| validate_and_copy_buf(unsigned int offset, unsigned int buffer_length, |
| struct smb2_hdr *hdr, unsigned int minbufsize, |
| char *data) |
| |
| { |
| char *begin_of_buf = 4 /* RFC1001 len field */ + offset + (char *)hdr; |
| int rc; |
| |
| if (!data) |
| return -EINVAL; |
| |
| rc = validate_buf(offset, buffer_length, hdr, minbufsize); |
| if (rc) |
| return rc; |
| |
| memcpy(data, begin_of_buf, buffer_length); |
| |
| return 0; |
| } |
| |
| static int |
| query_info(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, u8 info_class, |
| size_t output_len, size_t min_len, void *data) |
| { |
| struct smb2_query_info_req *req; |
| struct smb2_query_info_rsp *rsp = NULL; |
| struct kvec iov[2]; |
| int rc = 0; |
| int resp_buftype; |
| struct TCP_Server_Info *server; |
| struct cifs_ses *ses = tcon->ses; |
| |
| cifs_dbg(FYI, "Query Info\n"); |
| |
| if (ses && (ses->server)) |
| server = ses->server; |
| else |
| return -EIO; |
| |
| rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); |
| if (rc) |
| return rc; |
| |
| req->InfoType = SMB2_O_INFO_FILE; |
| req->FileInfoClass = info_class; |
| req->PersistentFileId = persistent_fid; |
| req->VolatileFileId = volatile_fid; |
| /* 4 for rfc1002 length field and 1 for Buffer */ |
| req->InputBufferOffset = |
| cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); |
| req->OutputBufferLength = cpu_to_le32(output_len); |
| |
| iov[0].iov_base = (char *)req; |
| /* 4 for rfc1002 length field */ |
| iov[0].iov_len = get_rfc1002_length(req) + 4; |
| |
| rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); |
| rsp = (struct smb2_query_info_rsp *)iov[0].iov_base; |
| |
| if (rc) { |
| cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); |
| goto qinf_exit; |
| } |
| |
| rc = validate_and_copy_buf(le16_to_cpu(rsp->OutputBufferOffset), |
| le32_to_cpu(rsp->OutputBufferLength), |
| &rsp->hdr, min_len, data); |
| |
| qinf_exit: |
| free_rsp_buf(resp_buftype, rsp); |
| return rc; |
| } |
| |
| int |
| SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, |
| struct smb2_file_all_info *data) |
| { |
| return query_info(xid, tcon, persistent_fid, volatile_fid, |
| FILE_ALL_INFORMATION, |
| sizeof(struct smb2_file_all_info) + MAX_NAME * 2, |
| sizeof(struct smb2_file_all_info), data); |
| } |
| |
| int |
| SMB2_get_srv_num(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, __le64 *uniqueid) |
| { |
| return query_info(xid, tcon, persistent_fid, volatile_fid, |
| FILE_INTERNAL_INFORMATION, |
| sizeof(struct smb2_file_internal_info), |
| sizeof(struct smb2_file_internal_info), uniqueid); |
| } |
| |
| /* |
| * This is a no-op for now. We're not really interested in the reply, but |
| * rather in the fact that the server sent one and that server->lstrp |
| * gets updated. |
| * |
| * FIXME: maybe we should consider checking that the reply matches request? |
| */ |
| static void |
| smb2_echo_callback(struct mid_q_entry *mid) |
| { |
| struct TCP_Server_Info *server = mid->callback_data; |
| struct smb2_echo_rsp *smb2 = (struct smb2_echo_rsp *)mid->resp_buf; |
| unsigned int credits_received = 1; |
| |
| if (mid->mid_state == MID_RESPONSE_RECEIVED) |
| credits_received = le16_to_cpu(smb2->hdr.CreditRequest); |
| |
| DeleteMidQEntry(mid); |
| add_credits(server, credits_received, CIFS_ECHO_OP); |
| } |
| |
| int |
| SMB2_echo(struct TCP_Server_Info *server) |
| { |
| struct smb2_echo_req *req; |
| int rc = 0; |
| struct kvec iov; |
| struct smb_rqst rqst = { .rq_iov = &iov, |
| .rq_nvec = 1 }; |
| |
| cifs_dbg(FYI, "In echo request\n"); |
| |
| rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req); |
| if (rc) |
| return rc; |
| |
| req->hdr.CreditRequest = cpu_to_le16(1); |
| |
| iov.iov_base = (char *)req; |
| /* 4 for rfc1002 length field */ |
| iov.iov_len = get_rfc1002_length(req) + 4; |
| |
| rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, server, |
| CIFS_ECHO_OP); |
| if (rc) |
| cifs_dbg(FYI, "Echo request failed: %d\n", rc); |
| |
| cifs_small_buf_release(req); |
| return rc; |
| } |
| |
| int |
| SMB2_flush(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, |
| u64 volatile_fid) |
| { |
| struct smb2_flush_req *req; |
| struct TCP_Server_Info *server; |
| struct cifs_ses *ses = tcon->ses; |
| struct kvec iov[1]; |
| int resp_buftype; |
| int rc = 0; |
| |
| cifs_dbg(FYI, "Flush\n"); |
| |
| if (ses && (ses->server)) |
| server = ses->server; |
| else |
| return -EIO; |
| |
| rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req); |
| if (rc) |
| return rc; |
| |
| req->PersistentFileId = persistent_fid; |
| req->VolatileFileId = volatile_fid; |
| |
| iov[0].iov_base = (char *)req; |
| /* 4 for rfc1002 length field */ |
| iov[0].iov_len = get_rfc1002_length(req) + 4; |
| |
| rc = SendReceive2(xid, ses, iov, 1, &resp_buftype, 0); |
| |
| if ((rc != 0) && tcon) |
| cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE); |
| |
| free_rsp_buf(resp_buftype, iov[0].iov_base); |
| return rc; |
| } |
| |
| /* |
| * To form a chain of read requests, any read requests after the first should |
| * have the end_of_chain boolean set to true. |
| */ |
| static int |
| smb2_new_read_req(struct kvec *iov, struct cifs_io_parms *io_parms, |
| unsigned int remaining_bytes, int request_type) |
| { |
| int rc = -EACCES; |
| struct smb2_read_req *req = NULL; |
| |
| rc = small_smb2_init(SMB2_READ, io_parms->tcon, (void **) &req); |
| if (rc) |
| return rc; |
| if (io_parms->tcon->ses->server == NULL) |
| return -ECONNABORTED; |
| |
| req->hdr.ProcessId = cpu_to_le32(io_parms->pid); |
| |
| req->PersistentFileId = io_parms->persistent_fid; |
| req->VolatileFileId = io_parms->volatile_fid; |
| req->ReadChannelInfoOffset = 0; /* reserved */ |
| req->ReadChannelInfoLength = 0; /* reserved */ |
| req->Channel = 0; /* reserved */ |
| req->MinimumCount = 0; |
| req->Length = cpu_to_le32(io_parms->length); |
| req->Offset = cpu_to_le64(io_parms->offset); |
| |
| if (request_type & CHAINED_REQUEST) { |
| if (!(request_type & END_OF_CHAIN)) { |
| /* 4 for rfc1002 length field */ |
| req->hdr.NextCommand = |
| cpu_to_le32(get_rfc1002_length(req) + 4); |
| } else /* END_OF_CHAIN */ |
| req->hdr.NextCommand = 0; |
| if (request_type & RELATED_REQUEST) { |
| req->hdr.Flags |= SMB2_FLAGS_RELATED_OPERATIONS; |
| /* |
| * Related requests use info from previous read request |
| * in chain. |
| */ |
| req->hdr.SessionId = 0xFFFFFFFF; |
| req->hdr.TreeId = 0xFFFFFFFF; |
| req->PersistentFileId = 0xFFFFFFFF; |
| req->VolatileFileId = 0xFFFFFFFF; |
| } |
| } |
| if (remaining_bytes > io_parms->length) |
| req->RemainingBytes = cpu_to_le32(remaining_bytes); |
| else |
| req->RemainingBytes = 0; |
| |
| iov[0].iov_base = (char *)req; |
| /* 4 for rfc1002 length field */ |
| iov[0].iov_len = get_rfc1002_length(req) + 4; |
| return rc; |
| } |
| |
| static void |
| smb2_readv_callback(struct mid_q_entry *mid) |
| { |
| struct cifs_readdata *rdata = mid->callback_data; |
| struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink); |
| struct TCP_Server_Info *server = tcon->ses->server; |
| struct smb2_hdr *buf = (struct smb2_hdr *)rdata->iov.iov_base; |
| unsigned int credits_received = 1; |
| struct smb_rqst rqst = { .rq_iov = &rdata->iov, |
| .rq_nvec = 1, |
| .rq_pages = rdata->pages, |
| .rq_npages = rdata->nr_pages, |
| .rq_pagesz = rdata->pagesz, |
| .rq_tailsz = rdata->tailsz }; |
| |
| cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n", |
| __func__, mid->mid, mid->mid_state, rdata->result, |
| rdata->bytes); |
| |
| switch (mid->mid_state) { |
| case MID_RESPONSE_RECEIVED: |
| credits_received = le16_to_cpu(buf->CreditRequest); |
| /* result already set, check signature */ |
| if (server->sign) { |
| int rc; |
| |
| rc = smb2_verify_signature(&rqst, server); |
| if (rc) |
| cifs_dbg(VFS, "SMB signature verification returned error = %d\n", |
| rc); |
| } |
| /* FIXME: should this be counted toward the initiating task? */ |
| task_io_account_read(rdata->bytes); |
| cifs_stats_bytes_read(tcon, rdata->bytes); |
| break; |
| case MID_REQUEST_SUBMITTED: |
| case MID_RETRY_NEEDED: |
| rdata->result = -EAGAIN; |
| break; |
| default: |
| if (rdata->result != -ENODATA) |
| rdata->result = -EIO; |
| } |
| |
| if (rdata->result) |
| cifs_stats_fail_inc(tcon, SMB2_READ_HE); |
| |
| queue_work(cifsiod_wq, &rdata->work); |
| DeleteMidQEntry(mid); |
| add_credits(server, credits_received, 0); |
| } |
| |
| /* smb2_async_readv - send an async write, and set up mid to handle result */ |
| int |
| smb2_async_readv(struct cifs_readdata *rdata) |
| { |
| int rc; |
| struct smb2_hdr *buf; |
| struct cifs_io_parms io_parms; |
| struct smb_rqst rqst = { .rq_iov = &rdata->iov, |
| .rq_nvec = 1 }; |
| |
| cifs_dbg(FYI, "%s: offset=%llu bytes=%u\n", |
| __func__, rdata->offset, rdata->bytes); |
| |
| io_parms.tcon = tlink_tcon(rdata->cfile->tlink); |
| io_parms.offset = rdata->offset; |
| io_parms.length = rdata->bytes; |
| io_parms.persistent_fid = rdata->cfile->fid.persistent_fid; |
| io_parms.volatile_fid = rdata->cfile->fid.volatile_fid; |
| io_parms.pid = rdata->pid; |
| rc = smb2_new_read_req(&rdata->iov, &io_parms, 0, 0); |
| if (rc) |
| return rc; |
| |
| buf = (struct smb2_hdr *)rdata->iov.iov_base; |
| /* 4 for rfc1002 length field */ |
| rdata->iov.iov_len = get_rfc1002_length(rdata->iov.iov_base) + 4; |
| |
| kref_get(&rdata->refcount); |
| rc = cifs_call_async(io_parms.tcon->ses->server, &rqst, |
| cifs_readv_receive, smb2_readv_callback, |
| rdata, 0); |
| if (rc) { |
| kref_put(&rdata->refcount, cifs_readdata_release); |
| cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE); |
| } |
| |
| cifs_small_buf_release(buf); |
| return rc; |
| } |
| |
| int |
| SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms, |
| unsigned int *nbytes, char **buf, int *buf_type) |
| { |
| int resp_buftype, rc = -EACCES; |
| struct smb2_read_rsp *rsp = NULL; |
| struct kvec iov[1]; |
| |
| *nbytes = 0; |
| rc = smb2_new_read_req(iov, io_parms, 0, 0); |
| if (rc) |
| return rc; |
| |
| rc = SendReceive2(xid, io_parms->tcon->ses, iov, 1, |
| &resp_buftype, CIFS_LOG_ERROR); |
| |
| rsp = (struct smb2_read_rsp *)iov[0].iov_base; |
| |
| if (rsp->hdr.Status == STATUS_END_OF_FILE) { |
| free_rsp_buf(resp_buftype, iov[0].iov_base); |
| return 0; |
| } |
| |
| if (rc) { |
| cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE); |
| cifs_dbg(VFS, "Send error in read = %d\n", rc); |
| } else { |
| *nbytes = le32_to_cpu(rsp->DataLength); |
| if ((*nbytes > CIFS_MAX_MSGSIZE) || |
| (*nbytes > io_parms->length)) { |
| cifs_dbg(FYI, "bad length %d for count %d\n", |
| *nbytes, io_parms->length); |
| rc = -EIO; |
| *nbytes = 0; |
| } |
| } |
| |
| if (*buf) { |
| memcpy(*buf, (char *)rsp->hdr.ProtocolId + rsp->DataOffset, |
| *nbytes); |
| free_rsp_buf(resp_buftype, iov[0].iov_base); |
| } else if (resp_buftype != CIFS_NO_BUFFER) { |
| *buf = iov[0].iov_base; |
| if (resp_buftype == CIFS_SMALL_BUFFER) |
| *buf_type = CIFS_SMALL_BUFFER; |
| else if (resp_buftype == CIFS_LARGE_BUFFER) |
| *buf_type = CIFS_LARGE_BUFFER; |
| } |
| return rc; |
| } |
| |
| /* |
| * Check the mid_state and signature on received buffer (if any), and queue the |
| * workqueue completion task. |
| */ |
| static void |
| smb2_writev_callback(struct mid_q_entry *mid) |
| { |
| struct cifs_writedata *wdata = mid->callback_data; |
| struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); |
| unsigned int written; |
| struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf; |
| unsigned int credits_received = 1; |
| |
| switch (mid->mid_state) { |
| case MID_RESPONSE_RECEIVED: |
| credits_received = le16_to_cpu(rsp->hdr.CreditRequest); |
| wdata->result = smb2_check_receive(mid, tcon->ses->server, 0); |
| if (wdata->result != 0) |
| break; |
| |
| written = le32_to_cpu(rsp->DataLength); |
| /* |
| * Mask off high 16 bits when bytes written as returned |
| * by the server is greater than bytes requested by the |
| * client. OS/2 servers are known to set incorrect |
| * CountHigh values. |
| */ |
| if (written > wdata->bytes) |
| written &= 0xFFFF; |
| |
| if (written < wdata->bytes) |
| wdata->result = -ENOSPC; |
| else |
| wdata->bytes = written; |
| break; |
| case MID_REQUEST_SUBMITTED: |
| case MID_RETRY_NEEDED: |
| wdata->result = -EAGAIN; |
| break; |
| default: |
| wdata->result = -EIO; |
| break; |
| } |
| |
| if (wdata->result) |
| cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
| |
| queue_work(cifsiod_wq, &wdata->work); |
| DeleteMidQEntry(mid); |
| add_credits(tcon->ses->server, credits_received, 0); |
| } |
| |
| /* smb2_async_writev - send an async write, and set up mid to handle result */ |
| int |
| smb2_async_writev(struct cifs_writedata *wdata) |
| { |
| int rc = -EACCES; |
| struct smb2_write_req *req = NULL; |
| struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink); |
| struct kvec iov; |
| struct smb_rqst rqst; |
| |
| rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req); |
| if (rc) |
| goto async_writev_out; |
| |
| req->hdr.ProcessId = cpu_to_le32(wdata->cfile->pid); |
| |
| req->PersistentFileId = wdata->cfile->fid.persistent_fid; |
| req->VolatileFileId = wdata->cfile->fid.volatile_fid; |
| req->WriteChannelInfoOffset = 0; |
| req->WriteChannelInfoLength = 0; |
| req->Channel = 0; |
| req->Offset = cpu_to_le64(wdata->offset); |
| /* 4 for rfc1002 length field */ |
| req->DataOffset = cpu_to_le16( |
| offsetof(struct smb2_write_req, Buffer) - 4); |
| req->RemainingBytes = 0; |
| |
| /* 4 for rfc1002 length field and 1 for Buffer */ |
| iov.iov_len = get_rfc1002_length(req) + 4 - 1; |
| iov.iov_base = req; |
| |
| rqst.rq_iov = &iov; |
| rqst.rq_nvec = 1; |
| rqst.rq_pages = wdata->pages; |
| rqst.rq_npages = wdata->nr_pages; |
| rqst.rq_pagesz = wdata->pagesz; |
| rqst.rq_tailsz = wdata->tailsz; |
| |
| cifs_dbg(FYI, "async write at %llu %u bytes\n", |
| wdata->offset, wdata->bytes); |
| |
| req->Length = cpu_to_le32(wdata->bytes); |
| |
| inc_rfc1001_len(&req->hdr, wdata->bytes - 1 /* Buffer */); |
| |
| kref_get(&wdata->refcount); |
| rc = cifs_call_async(tcon->ses->server, &rqst, NULL, |
| smb2_writev_callback, wdata, 0); |
| |
| if (rc) { |
| kref_put(&wdata->refcount, cifs_writedata_release); |
| cifs_stats_fail_inc(tcon, SMB2_WRITE_HE); |
| } |
| |
| async_writev_out: |
| cifs_small_buf_release(req); |
| return rc; |
| } |
| |
| /* |
| * SMB2_write function gets iov pointer to kvec array with n_vec as a length. |
| * The length field from io_parms must be at least 1 and indicates a number of |
| * elements with data to write that begins with position 1 in iov array. All |
| * data length is specified by count. |
| */ |
| int |
| SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms, |
| unsigned int *nbytes, struct kvec *iov, int n_vec) |
| { |
| int rc = 0; |
| struct smb2_write_req *req = NULL; |
| struct smb2_write_rsp *rsp = NULL; |
| int resp_buftype; |
| *nbytes = 0; |
| |
| if (n_vec < 1) |
| return rc; |
| |
| rc = small_smb2_init(SMB2_WRITE, io_parms->tcon, (void **) &req); |
| if (rc) |
| return rc; |
| |
| if (io_parms->tcon->ses->server == NULL) |
| return -ECONNABORTED; |
| |
| req->hdr.ProcessId = cpu_to_le32(io_parms->pid); |
| |
| req->PersistentFileId = io_parms->persistent_fid; |
| req->VolatileFileId = io_parms->volatile_fid; |
| req->WriteChannelInfoOffset = 0; |
| req->WriteChannelInfoLength = 0; |
| req->Channel = 0; |
| req->Length = cpu_to_le32(io_parms->length); |
| req->Offset = cpu_to_le64(io_parms->offset); |
| /* 4 for rfc1002 length field */ |
| req->DataOffset = cpu_to_le16( |
| offsetof(struct smb2_write_req, Buffer) - 4); |
| req->RemainingBytes = 0; |
| |
| iov[0].iov_base = (char *)req; |
| /* 4 for rfc1002 length field and 1 for Buffer */ |
| iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; |
| |
| /* length of entire message including data to be written */ |
| inc_rfc1001_len(req, io_parms->length - 1 /* Buffer */); |
| |
| rc = SendReceive2(xid, io_parms->tcon->ses, iov, n_vec + 1, |
| &resp_buftype, 0); |
| rsp = (struct smb2_write_rsp *)iov[0].iov_base; |
| |
| if (rc) { |
| cifs_stats_fail_inc(io_parms->tcon, SMB2_WRITE_HE); |
| cifs_dbg(VFS, "Send error in write = %d\n", rc); |
| } else |
| *nbytes = le32_to_cpu(rsp->DataLength); |
| |
| free_rsp_buf(resp_buftype, rsp); |
| return rc; |
| } |
| |
| static unsigned int |
| num_entries(char *bufstart, char *end_of_buf, char **lastentry, size_t size) |
| { |
| int len; |
| unsigned int entrycount = 0; |
| unsigned int next_offset = 0; |
| FILE_DIRECTORY_INFO *entryptr; |
| |
| if (bufstart == NULL) |
| return 0; |
| |
| entryptr = (FILE_DIRECTORY_INFO *)bufstart; |
| |
| while (1) { |
| entryptr = (FILE_DIRECTORY_INFO *) |
| ((char *)entryptr + next_offset); |
| |
| if ((char *)entryptr + size > end_of_buf) { |
| cifs_dbg(VFS, "malformed search entry would overflow\n"); |
| break; |
| } |
| |
| len = le32_to_cpu(entryptr->FileNameLength); |
| if ((char *)entryptr + len + size > end_of_buf) { |
| cifs_dbg(VFS, "directory entry name would overflow frame end of buf %p\n", |
| end_of_buf); |
| break; |
| } |
| |
| *lastentry = (char *)entryptr; |
| entrycount++; |
| |
| next_offset = le32_to_cpu(entryptr->NextEntryOffset); |
| if (!next_offset) |
| break; |
| } |
| |
| return entrycount; |
| } |
| |
| /* |
| * Readdir/FindFirst |
| */ |
| int |
| SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, int index, |
| struct cifs_search_info *srch_inf) |
| { |
| struct smb2_query_directory_req *req; |
| struct smb2_query_directory_rsp *rsp = NULL; |
| struct kvec iov[2]; |
| int rc = 0; |
| int len; |
| int resp_buftype; |
| unsigned char *bufptr; |
| struct TCP_Server_Info *server; |
| struct cifs_ses *ses = tcon->ses; |
| __le16 asteriks = cpu_to_le16('*'); |
| char *end_of_smb; |
| unsigned int output_size = CIFSMaxBufSize; |
| size_t info_buf_size; |
| |
| if (ses && (ses->server)) |
| server = ses->server; |
| else |
| return -EIO; |
| |
| rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req); |
| if (rc) |
| return rc; |
| |
| switch (srch_inf->info_level) { |
| case SMB_FIND_FILE_DIRECTORY_INFO: |
| req->FileInformationClass = FILE_DIRECTORY_INFORMATION; |
| info_buf_size = sizeof(FILE_DIRECTORY_INFO) - 1; |
| break; |
| case SMB_FIND_FILE_ID_FULL_DIR_INFO: |
| req->FileInformationClass = FILEID_FULL_DIRECTORY_INFORMATION; |
| info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1; |
| break; |
| default: |
| cifs_dbg(VFS, "info level %u isn't supported\n", |
| srch_inf->info_level); |
| rc = -EINVAL; |
| goto qdir_exit; |
| } |
| |
| req->FileIndex = cpu_to_le32(index); |
| req->PersistentFileId = persistent_fid; |
| req->VolatileFileId = volatile_fid; |
| |
| len = 0x2; |
| bufptr = req->Buffer; |
| memcpy(bufptr, &asteriks, len); |
| |
| req->FileNameOffset = |
| cpu_to_le16(sizeof(struct smb2_query_directory_req) - 1 - 4); |
| req->FileNameLength = cpu_to_le16(len); |
| /* |
| * BB could be 30 bytes or so longer if we used SMB2 specific |
| * buffer lengths, but this is safe and close enough. |
| */ |
| output_size = min_t(unsigned int, output_size, server->maxBuf); |
| output_size = min_t(unsigned int, output_size, 2 << 15); |
| req->OutputBufferLength = cpu_to_le32(output_size); |
| |
| iov[0].iov_base = (char *)req; |
| /* 4 for RFC1001 length and 1 for Buffer */ |
| iov[0].iov_len = get_rfc1002_length(req) + 4 - 1; |
| |
| iov[1].iov_base = (char *)(req->Buffer); |
| iov[1].iov_len = len; |
| |
| inc_rfc1001_len(req, len - 1 /* Buffer */); |
| |
| rc = SendReceive2(xid, ses, iov, 2, &resp_buftype, 0); |
| rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base; |
| |
| if (rc) { |
| cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE); |
| goto qdir_exit; |
| } |
| |
| rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), |
| le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, |
| info_buf_size); |
| if (rc) |
| goto qdir_exit; |
| |
| srch_inf->unicode = true; |
| |
| if (srch_inf->ntwrk_buf_start) { |
| if (srch_inf->smallBuf) |
| cifs_small_buf_release(srch_inf->ntwrk_buf_start); |
| else |
| cifs_buf_release(srch_inf->ntwrk_buf_start); |
| } |
| srch_inf->ntwrk_buf_start = (char *)rsp; |
| srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ + |
| (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset); |
| /* 4 for rfc1002 length field */ |
| end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr; |
| srch_inf->entries_in_buffer = |
| num_entries(srch_inf->srch_entries_start, end_of_smb, |
| &srch_inf->last_entry, info_buf_size); |
| srch_inf->index_of_last_entry += srch_inf->entries_in_buffer; |
| cifs_dbg(FYI, "num entries %d last_index %lld srch start %p srch end %p\n", |
| srch_inf->entries_in_buffer, srch_inf->index_of_last_entry, |
| srch_inf->srch_entries_start, srch_inf->last_entry); |
| if (resp_buftype == CIFS_LARGE_BUFFER) |
| srch_inf->smallBuf = false; |
| else if (resp_buftype == CIFS_SMALL_BUFFER) |
| srch_inf->smallBuf = true; |
| else |
| cifs_dbg(VFS, "illegal search buffer type\n"); |
| |
| if (rsp->hdr.Status == STATUS_NO_MORE_FILES) |
| srch_inf->endOfSearch = 1; |
| else |
| srch_inf->endOfSearch = 0; |
| |
| return rc; |
| |
| qdir_exit: |
| free_rsp_buf(resp_buftype, rsp); |
| return rc; |
| } |
| |
| static int |
| send_set_info(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, u32 pid, int info_class, |
| unsigned int num, void **data, unsigned int *size) |
| { |
| struct smb2_set_info_req *req; |
| struct smb2_set_info_rsp *rsp = NULL; |
| struct kvec *iov; |
| int rc = 0; |
| int resp_buftype; |
| unsigned int i; |
| struct TCP_Server_Info *server; |
| struct cifs_ses *ses = tcon->ses; |
| |
| if (ses && (ses->server)) |
| server = ses->server; |
| else |
| return -EIO; |
| |
| if (!num) |
| return -EINVAL; |
| |
| iov = kmalloc(sizeof(struct kvec) * num, GFP_KERNEL); |
| if (!iov) |
| return -ENOMEM; |
| |
| rc = small_smb2_init(SMB2_SET_INFO, tcon, (void **) &req); |
| if (rc) { |
| kfree(iov); |
| return rc; |
| } |
| |
| req->hdr.ProcessId = cpu_to_le32(pid); |
| |
| req->InfoType = SMB2_O_INFO_FILE; |
| req->FileInfoClass = info_class; |
| req->PersistentFileId = persistent_fid; |
| req->VolatileFileId = volatile_fid; |
| |
| /* 4 for RFC1001 length and 1 for Buffer */ |
| req->BufferOffset = |
| cpu_to_le16(sizeof(struct smb2_set_info_req) - 1 - 4); |
| req->BufferLength = cpu_to_le32(*size); |
| |
| inc_rfc1001_len(req, *size - 1 /* Buffer */); |
| |
| memcpy(req->Buffer, *data, *size); |
| |
| iov[0].iov_base = (char *)req; |
| /* 4 for RFC1001 length */ |
| iov[0].iov_len = get_rfc1002_length(req) + 4; |
| |
| for (i = 1; i < num; i++) { |
| inc_rfc1001_len(req, size[i]); |
| le32_add_cpu(&req->BufferLength, size[i]); |
| iov[i].iov_base = (char *)data[i]; |
| iov[i].iov_len = size[i]; |
| } |
| |
| rc = SendReceive2(xid, ses, iov, num, &resp_buftype, 0); |
| rsp = (struct smb2_set_info_rsp *)iov[0].iov_base; |
| |
| if (rc != 0) { |
| cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE); |
| goto out; |
| } |
| out: |
| free_rsp_buf(resp_buftype, rsp); |
| kfree(iov); |
| return rc; |
| } |
| |
| int |
| SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, __le16 *target_file) |
| { |
| struct smb2_file_rename_info info; |
| void **data; |
| unsigned int size[2]; |
| int rc; |
| int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); |
| |
| data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| info.ReplaceIfExists = 1; /* 1 = replace existing target with new */ |
| /* 0 = fail if target already exists */ |
| info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ |
| info.FileNameLength = cpu_to_le32(len); |
| |
| data[0] = &info; |
| size[0] = sizeof(struct smb2_file_rename_info); |
| |
| data[1] = target_file; |
| size[1] = len + 2 /* null */; |
| |
| rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, |
| current->tgid, FILE_RENAME_INFORMATION, 2, data, |
| size); |
| kfree(data); |
| return rc; |
| } |
| |
| int |
| SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, __le16 *target_file) |
| { |
| struct smb2_file_link_info info; |
| void **data; |
| unsigned int size[2]; |
| int rc; |
| int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX)); |
| |
| data = kmalloc(sizeof(void *) * 2, GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| info.ReplaceIfExists = 0; /* 1 = replace existing link with new */ |
| /* 0 = fail if link already exists */ |
| info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */ |
| info.FileNameLength = cpu_to_le32(len); |
| |
| data[0] = &info; |
| size[0] = sizeof(struct smb2_file_link_info); |
| |
| data[1] = target_file; |
| size[1] = len + 2 /* null */; |
| |
| rc = send_set_info(xid, tcon, persistent_fid, volatile_fid, |
| current->tgid, FILE_LINK_INFORMATION, 2, data, size); |
| kfree(data); |
| return rc; |
| } |
| |
| int |
| SMB2_set_eof(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, |
| u64 volatile_fid, u32 pid, __le64 *eof) |
| { |
| struct smb2_file_eof_info info; |
| void *data; |
| unsigned int size; |
| |
| info.EndOfFile = *eof; |
| |
| data = &info; |
| size = sizeof(struct smb2_file_eof_info); |
| |
| return send_set_info(xid, tcon, persistent_fid, volatile_fid, pid, |
| FILE_END_OF_FILE_INFORMATION, 1, &data, &size); |
| } |
| |
| int |
| SMB2_set_info(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, FILE_BASIC_INFO *buf) |
| { |
| unsigned int size; |
| size = sizeof(FILE_BASIC_INFO); |
| return send_set_info(xid, tcon, persistent_fid, volatile_fid, |
| current->tgid, FILE_BASIC_INFORMATION, 1, |
| (void **)&buf, &size); |
| } |
| |
| int |
| SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon, |
| const u64 persistent_fid, const u64 volatile_fid, |
| __u8 oplock_level) |
| { |
| int rc; |
| struct smb2_oplock_break *req = NULL; |
| |
| cifs_dbg(FYI, "SMB2_oplock_break\n"); |
| rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); |
| |
| if (rc) |
| return rc; |
| |
| req->VolatileFid = volatile_fid; |
| req->PersistentFid = persistent_fid; |
| req->OplockLevel = oplock_level; |
| req->hdr.CreditRequest = cpu_to_le16(1); |
| |
| rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); |
| /* SMB2 buffer freed by function above */ |
| |
| if (rc) { |
| cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); |
| cifs_dbg(FYI, "Send error in Oplock Break = %d\n", rc); |
| } |
| |
| return rc; |
| } |
| |
| static void |
| copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf, |
| struct kstatfs *kst) |
| { |
| kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) * |
| le32_to_cpu(pfs_inf->SectorsPerAllocationUnit); |
| kst->f_blocks = le64_to_cpu(pfs_inf->TotalAllocationUnits); |
| kst->f_bfree = le64_to_cpu(pfs_inf->ActualAvailableAllocationUnits); |
| kst->f_bavail = le64_to_cpu(pfs_inf->CallerAvailableAllocationUnits); |
| return; |
| } |
| |
| static int |
| build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level, |
| int outbuf_len, u64 persistent_fid, u64 volatile_fid) |
| { |
| int rc; |
| struct smb2_query_info_req *req; |
| |
| cifs_dbg(FYI, "Query FSInfo level %d\n", level); |
| |
| if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) |
| return -EIO; |
| |
| rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req); |
| if (rc) |
| return rc; |
| |
| req->InfoType = SMB2_O_INFO_FILESYSTEM; |
| req->FileInfoClass = level; |
| req->PersistentFileId = persistent_fid; |
| req->VolatileFileId = volatile_fid; |
| /* 4 for rfc1002 length field and 1 for pad */ |
| req->InputBufferOffset = |
| cpu_to_le16(sizeof(struct smb2_query_info_req) - 1 - 4); |
| req->OutputBufferLength = cpu_to_le32( |
| outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - 4); |
| |
| iov->iov_base = (char *)req; |
| /* 4 for rfc1002 length field */ |
| iov->iov_len = get_rfc1002_length(req) + 4; |
| return 0; |
| } |
| |
| int |
| SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon, |
| u64 persistent_fid, u64 volatile_fid, struct kstatfs *fsdata) |
| { |
| struct smb2_query_info_rsp *rsp = NULL; |
| struct kvec iov; |
| int rc = 0; |
| int resp_buftype; |
| struct cifs_ses *ses = tcon->ses; |
| struct smb2_fs_full_size_info *info = NULL; |
| |
| rc = build_qfs_info_req(&iov, tcon, FS_FULL_SIZE_INFORMATION, |
| sizeof(struct smb2_fs_full_size_info), |
| persistent_fid, volatile_fid); |
| if (rc) |
| return rc; |
| |
| rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, 0); |
| if (rc) { |
| cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE); |
| goto qinf_exit; |
| } |
| rsp = (struct smb2_query_info_rsp *)iov.iov_base; |
| |
| info = (struct smb2_fs_full_size_info *)(4 /* RFC1001 len */ + |
| le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr); |
| rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset), |
| le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr, |
| sizeof(struct smb2_fs_full_size_info)); |
| if (!rc) |
| copy_fs_info_to_kstatfs(info, fsdata); |
| |
| qinf_exit: |
| free_rsp_buf(resp_buftype, iov.iov_base); |
| return rc; |
| } |
| |
| int |
| smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon, |
| const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, |
| const __u32 num_lock, struct smb2_lock_element *buf) |
| { |
| int rc = 0; |
| struct smb2_lock_req *req = NULL; |
| struct kvec iov[2]; |
| int resp_buf_type; |
| unsigned int count; |
| |
| cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock); |
| |
| rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req); |
| if (rc) |
| return rc; |
| |
| req->hdr.ProcessId = cpu_to_le32(pid); |
| req->LockCount = cpu_to_le16(num_lock); |
| |
| req->PersistentFileId = persist_fid; |
| req->VolatileFileId = volatile_fid; |
| |
| count = num_lock * sizeof(struct smb2_lock_element); |
| inc_rfc1001_len(req, count - sizeof(struct smb2_lock_element)); |
| |
| iov[0].iov_base = (char *)req; |
| /* 4 for rfc1002 length field and count for all locks */ |
| iov[0].iov_len = get_rfc1002_length(req) + 4 - count; |
| iov[1].iov_base = (char *)buf; |
| iov[1].iov_len = count; |
| |
| cifs_stats_inc(&tcon->stats.cifs_stats.num_locks); |
| rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP); |
| if (rc) { |
| cifs_dbg(FYI, "Send error in smb2_lockv = %d\n", rc); |
| cifs_stats_fail_inc(tcon, SMB2_LOCK_HE); |
| } |
| |
| return rc; |
| } |
| |
| int |
| SMB2_lock(const unsigned int xid, struct cifs_tcon *tcon, |
| const __u64 persist_fid, const __u64 volatile_fid, const __u32 pid, |
| const __u64 length, const __u64 offset, const __u32 lock_flags, |
| const bool wait) |
| { |
| struct smb2_lock_element lock; |
| |
| lock.Offset = cpu_to_le64(offset); |
| lock.Length = cpu_to_le64(length); |
| lock.Flags = cpu_to_le32(lock_flags); |
| if (!wait && lock_flags != SMB2_LOCKFLAG_UNLOCK) |
| lock.Flags |= cpu_to_le32(SMB2_LOCKFLAG_FAIL_IMMEDIATELY); |
| |
| return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock); |
| } |
| |
| int |
| SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon, |
| __u8 *lease_key, const __le32 lease_state) |
| { |
| int rc; |
| struct smb2_lease_ack *req = NULL; |
| |
| cifs_dbg(FYI, "SMB2_lease_break\n"); |
| rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req); |
| |
| if (rc) |
| return rc; |
| |
| req->hdr.CreditRequest = cpu_to_le16(1); |
| req->StructureSize = cpu_to_le16(36); |
| inc_rfc1001_len(req, 12); |
| |
| memcpy(req->LeaseKey, lease_key, 16); |
| req->LeaseState = lease_state; |
| |
| rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP); |
| /* SMB2 buffer freed by function above */ |
| |
| if (rc) { |
| cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE); |
| cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc); |
| } |
| |
| return rc; |
| } |