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-rw-r--r--fs/cifs/smb2pdu.c2211
1 files changed, 2211 insertions, 0 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
new file mode 100644
index 00000000000..41d9d0725f0
--- /dev/null
+++ b/fs/cifs/smb2pdu.c
@@ -0,0 +1,2211 @@
+/*
+ * 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->sec_mode & SECMODE_SIGN_REQUIRED))
+ 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)) {
+ cFYI(1, "can not send cmd %d while umounting",
+ 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) {
+ cFYI(1, "gave up waiting on reconnect in smb_init");
+ 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);
+ cFYI(1, "reconnect tcon rc = %d", 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;
+ unsigned int sec_flags;
+ u16 temp = 0;
+ int blob_offset, blob_length;
+ char *security_blob;
+ int flags = CIFS_NEG_OP;
+
+ cFYI(1, "Negotiate protocol");
+
+ if (ses->server)
+ server = ses->server;
+ else {
+ rc = -EIO;
+ return rc;
+ }
+
+ rc = small_smb2_init(SMB2_NEGOTIATE, NULL, (void **) &req);
+ if (rc)
+ return rc;
+
+ /* if any of auth flags (ie not sign or seal) are overriden use them */
+ if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
+ sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/
+ else /* if override flags set only sign/seal OR them with global auth */
+ sec_flags = global_secflags | ses->overrideSecFlg;
+
+ cFYI(1, "sec_flags 0x%x", sec_flags);
+
+ 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 ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN)
+ temp = SMB2_NEGOTIATE_SIGNING_REQUIRED;
+ else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */
+ temp = SMB2_NEGOTIATE_SIGNING_ENABLED;
+
+ req->SecurityMode = cpu_to_le16(temp);
+
+ 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;
+
+ cFYI(1, "mode 0x%x", 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))
+ cFYI(1, "negotiated smb2.0 dialect");
+ else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
+ cFYI(1, "negotiated smb2.1 dialect");
+ else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
+ cFYI(1, "negotiated smb3.0 dialect");
+ else {
+ cERROR(1, "Illegal dialect returned by server %d",
+ le16_to_cpu(rsp->DialectRevision));
+ rc = -EIO;
+ goto neg_exit;
+ }
+ server->dialect = le16_to_cpu(rsp->DialectRevision);
+
+ 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) {
+ cERROR(1, "missing security blob on negprot");
+ rc = -EIO;
+ goto neg_exit;
+ }
+
+ cFYI(1, "sec_flags 0x%x", sec_flags);
+ if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) {
+ cFYI(1, "Signing required");
+ if (!(server->sec_mode & (SMB2_NEGOTIATE_SIGNING_REQUIRED |
+ SMB2_NEGOTIATE_SIGNING_ENABLED))) {
+ cERROR(1, "signing required but server lacks support");
+ rc = -EOPNOTSUPP;
+ goto neg_exit;
+ }
+ server->sec_mode |= SECMODE_SIGN_REQUIRED;
+ } else if (sec_flags & CIFSSEC_MAY_SIGN) {
+ cFYI(1, "Signing optional");
+ if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
+ cFYI(1, "Server requires signing");
+ server->sec_mode |= SECMODE_SIGN_REQUIRED;
+ } else {
+ server->sec_mode &=
+ ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
+ }
+ } else {
+ cFYI(1, "Signing disabled");
+ if (server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
+ cERROR(1, "Server requires packet signing to be enabled"
+ " in /proc/fs/cifs/SecurityFlags.");
+ rc = -EOPNOTSUPP;
+ goto neg_exit;
+ }
+ server->sec_mode &=
+ ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
+ }
+
+#ifdef CONFIG_SMB2_ASN1 /* BB REMOVEME when updated asn1.c ready */
+ 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;
+ unsigned int sec_flags;
+ u8 temp = 0;
+ u16 blob_length = 0;
+ char *security_blob;
+ char *ntlmssp_blob = NULL;
+ bool use_spnego = false; /* else use raw ntlmssp */
+
+ cFYI(1, "Session Setup");
+
+ if (ses->server)
+ server = ses->server;
+ else {
+ rc = -EIO;
+ return rc;
+ }
+
+ /*
+ * 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;
+
+ ses->server->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;
+
+ /* if any of auth flags (ie not sign or seal) are overriden use them */
+ if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
+ sec_flags = ses->overrideSecFlg; /* BB FIXME fix sign flags?*/
+ else /* if override flags set only sign/seal OR them with global auth */
+ sec_flags = global_secflags | ses->overrideSecFlg;
+
+ cFYI(1, "sec_flags 0x%x", sec_flags);
+
+ 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 ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN)
+ temp = SMB2_NEGOTIATE_SIGNING_REQUIRED;
+ else if (ses->server->sec_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED)
+ temp = SMB2_NEGOTIATE_SIGNING_REQUIRED;
+ else if (sec_flags & CIFSSEC_MAY_SIGN) /* MAY_SIGN is a single flag */
+ temp = SMB2_NEGOTIATE_SIGNING_ENABLED;
+
+ req->SecurityMode = temp;
+ 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 */
+ cERROR(1, "spnego not supported for SMB2 yet");
+ 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) {
+ cERROR(1, "failed to malloc ntlmssp blob");
+ rc = -ENOMEM;
+ goto ssetup_exit;
+ }
+ rc = build_ntlmssp_auth_blob(ntlmssp_blob, &blob_length, ses,
+ nls_cp);
+ if (rc) {
+ cFYI(1, "build_ntlmssp_auth_blob failed %d", rc);
+ goto ssetup_exit; /* BB double check error handling */
+ }
+ if (use_spnego) {
+ /* blob_length = build_spnego_ntlmssp_blob(
+ &security_blob,
+ blob_length,
+ ntlmssp_blob); */
+ cERROR(1, "spnego not supported for SMB2 yet");
+ rc = -EOPNOTSUPP;
+ kfree(ntlmssp_blob);
+ goto ssetup_exit;
+ } else {
+ security_blob = ntlmssp_blob;
+ }
+ } else {
+ cERROR(1, "illegal ntlmssp phase");
+ 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) {
+ cERROR(1, "Unexpected more processing error");
+ goto ssetup_exit;
+ }
+ if (offsetof(struct smb2_sess_setup_rsp, Buffer) - 4 !=
+ le16_to_cpu(rsp->SecurityBufferOffset)) {
+ cERROR(1, "Invalid security buffer offset %d",
+ 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;
+
+ cFYI(1, "disconnect session %p", 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->sec_mode & SECMODE_SIGN_REQUIRED)
+ 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;
+
+ cFYI(1, "TCON");
+
+ 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)
+ cFYI(1, "connection to disk share");
+ else if (rsp->ShareType & SMB2_SHARE_TYPE_PIPE) {
+ tcon->ipc = true;
+ cFYI(1, "connection to pipe share");
+ } else if (rsp->ShareType & SMB2_SHARE_TYPE_PRINT) {
+ tcon->print = true;
+ cFYI(1, "connection to printer");
+ } else {
+ cERROR(1, "unknown share type %d", 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))
+ cERROR(1, "DFS capability contradicts DFS flag");
+
+tcon_exit:
+ free_rsp_buf(resp_buftype, rsp);
+ kfree(unc_path);
+ return rc;
+
+tcon_error_exit:
+ if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
+ cERROR(1, "BAD_NETWORK_NAME: %s", 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;
+
+ cFYI(1, "Tree Disconnect");
+
+ 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 = kmalloc(sizeof(struct create_lease), GFP_KERNEL);
+ if (!buf)
+ return NULL;
+
+ memset(buf, 0, sizeof(struct create_lease));
+
+ 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;
+
+ cFYI(1, "create/open");
+
+ 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;
+
+ cFYI(1, "Close");
+
+ 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) {
+ cERROR(1, "buffer length %d smaller than minimum size %d",
+ buffer_length, min_buf_size);
+ return -EINVAL;
+ }
+
+ /* check if beyond RFC1001 maximum length */
+ if ((smb_len > 0x7FFFFF) || (buffer_length > 0x7FFFFF)) {
+ cERROR(1, "buffer length %d or smb length %d too large",
+ buffer_length, smb_len);
+ return -EINVAL;
+ }
+
+ if ((begin_of_buf > end_of_smb) || (end_of_buf > end_of_smb)) {
+ cERROR(1, "illegal server response, bad offset to data");
+ 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;
+
+ cFYI(1, "Query Info");
+
+ 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 };
+
+ cFYI(1, "In echo request");
+
+ 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)
+ cFYI(1, "Echo request failed: %d", 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;
+
+ cFYI(1, "Flush");
+
+ 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 };
+
+ cFYI(1, "%s: mid=%llu state=%d result=%d bytes=%u", __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->sec_mode &
+ (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) {
+ int rc;
+
+ rc = smb2_verify_signature(&rqst, server);
+ if (rc)
+ cERROR(1, "SMB signature verification returned "
+ "error = %d", 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 };
+
+ cFYI(1, "%s: offset=%llu bytes=%u", __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);
+ cERROR(1, "Send error in read = %d", rc);
+ } else {
+ *nbytes = le32_to_cpu(rsp->DataLength);
+ if ((*nbytes > CIFS_MAX_MSGSIZE) ||
+ (*nbytes > io_parms->length)) {
+ cFYI(1, "bad length %d for count %d", *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;
+
+ cFYI(1, "async write at %llu %u bytes", 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);
+ cERROR(1, "Send error in write = %d", 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) {
+ cERROR(1, "malformed search entry would overflow");
+ break;
+ }
+
+ len = le32_to_cpu(entryptr->FileNameLength);
+ if ((char *)entryptr + len + size > end_of_buf) {
+ cERROR(1, "directory entry name would overflow frame "
+ "end of buf %p", 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:
+ cERROR(1, "info level %u isn't supported",
+ 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;
+ cFYI(1, "num entries %d last_index %lld srch start %p srch end %p",
+ 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
+ cERROR(1, "illegal search buffer type");
+
+ 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;
+
+ cFYI(1, "SMB2_oplock_break");
+ 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);
+ cFYI(1, "Send error in Oplock Break = %d", 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;
+
+ cFYI(1, "Query FSInfo level %d", 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;
+
+ cFYI(1, "smb2_lockv num lock %d", 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) {
+ cFYI(1, "Send error in smb2_lockv = %d", 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;
+
+ cFYI(1, "SMB2_lease_break");
+ 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);
+ cFYI(1, "Send error in Lease Break = %d", rc);
+ }
+
+ return rc;
+}