[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/fs/cifs/smb2pdu.c b/src/kernel/linux/v4.14/fs/cifs/smb2pdu.c
new file mode 100644
index 0000000..2097b5f
--- /dev/null
+++ b/src/kernel/linux/v4.14/fs/cifs/smb2pdu.c
@@ -0,0 +1,3637 @@
+/*
+ * fs/cifs/smb2pdu.c
+ *
+ * Copyright (C) International Business Machines Corp., 2009, 2013
+ * 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/uuid.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"
+#include "cifs_spnego.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 int encryption_required(const struct cifs_tcon *tcon)
+{
+ if (!tcon)
+ return 0;
+ if ((tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
+ (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
+ return 1;
+ if (tcon->seal &&
+ (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
+ return 1;
+ return 0;
+}
+
+static void
+smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
+ const struct cifs_tcon *tcon)
+{
+ shdr->ProtocolId = SMB2_PROTO_NUMBER;
+ shdr->StructureSize = cpu_to_le16(64);
+ shdr->Command = smb2_cmd;
+ if (tcon && tcon->ses && tcon->ses->server) {
+ struct TCP_Server_Info *server = tcon->ses->server;
+
+ spin_lock(&server->req_lock);
+ /* Request up to 2 credits but don't go over the limit. */
+ if (server->credits >= server->max_credits)
+ shdr->CreditRequest = cpu_to_le16(0);
+ else
+ shdr->CreditRequest = cpu_to_le16(
+ min_t(int, server->max_credits -
+ server->credits, 2));
+ spin_unlock(&server->req_lock);
+ } else {
+ shdr->CreditRequest = cpu_to_le16(2);
+ }
+ shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
+
+ if (!tcon)
+ goto out;
+
+ /* GLOBAL_CAP_LARGE_MTU will only be set if dialect > SMB2.02 */
+ /* See sections 2.2.4 and 3.2.4.1.5 of MS-SMB2 */
+ if ((tcon->ses) && (tcon->ses->server) &&
+ (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
+ shdr->CreditCharge = cpu_to_le16(1);
+ /* else CreditCharge MBZ */
+
+ shdr->TreeId = tcon->tid;
+ /* Uid is not converted */
+ if (tcon->ses)
+ shdr->SessionId = tcon->ses->Suid;
+
+ /*
+ * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
+ * to pass the path on the Open SMB prefixed by \\server\share.
+ * Not sure when we would need to do the augmented path (if ever) and
+ * setting this flag breaks the SMB2 open operation since it is
+ * illegal to send an empty path name (without \\server\share prefix)
+ * when the DFS flag is set in the SMB open header. We could
+ * consider setting the flag on all operations other than open
+ * but it is safer to net set it for now.
+ */
+/* if (tcon->share_flags & SHI1005_FLAGS_DFS)
+ shdr->Flags |= SMB2_FLAGS_DFS_OPERATIONS; */
+
+ if (tcon->ses && tcon->ses->server && tcon->ses->server->sign &&
+ !encryption_required(tcon))
+ shdr->Flags |= SMB2_FLAGS_SIGNED;
+out:
+ return;
+}
+
+static int
+smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
+{
+ int rc;
+ 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 0;
+
+ if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL)
+ return 0;
+
+ 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;
+ }
+
+ rc = wait_event_interruptible_timeout(server->response_q,
+ (server->tcpStatus != CifsNeedReconnect),
+ 10 * HZ);
+ if (rc < 0) {
+ cifs_dbg(FYI, "%s: aborting reconnect due to a received"
+ " signal by the process\n", __func__);
+ return -ERESTARTSYS;
+ }
+
+ /* 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 0;
+
+ nls_codepage = load_nls_default();
+
+ /*
+ * need to prevent multiple threads trying to simultaneously reconnect
+ * the same SMB session
+ */
+ mutex_lock(&tcon->ses->session_mutex);
+
+ /*
+ * Recheck after acquire mutex. If another thread is negotiating
+ * and the server never sends an answer the socket will be closed
+ * and tcpStatus set to reconnect.
+ */
+ if (server->tcpStatus == CifsNeedReconnect) {
+ rc = -EHOSTDOWN;
+ mutex_unlock(&tcon->ses->session_mutex);
+ goto out;
+ }
+
+ rc = cifs_negotiate_protocol(0, tcon->ses);
+ if (!rc && tcon->ses->need_reconnect) {
+ rc = cifs_setup_session(0, tcon->ses, nls_codepage);
+ if ((rc == -EACCES) && !tcon->retry) {
+ rc = -EHOSTDOWN;
+ mutex_unlock(&tcon->ses->session_mutex);
+ goto failed;
+ }
+ }
+ if (rc || !tcon->need_reconnect) {
+ mutex_unlock(&tcon->ses->session_mutex);
+ goto out;
+ }
+
+ cifs_mark_open_files_invalid(tcon);
+ if (tcon->use_persistent)
+ tcon->need_reopen_files = true;
+
+ 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;
+
+ if (smb2_command != SMB2_INTERNAL_CMD)
+ queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
+
+ atomic_inc(&tconInfoReconnectCount);
+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:
+ rc = -EAGAIN;
+ }
+failed:
+ unload_nls(nls_codepage);
+ return rc;
+}
+
+static void
+fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf,
+ unsigned int *total_len)
+{
+ struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
+ /* lookup word count ie StructureSize from table */
+ __u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
+
+ /*
+ * smaller than SMALL_BUFFER_SIZE but bigger than fixed area of
+ * largest operations (Create)
+ */
+ memset(buf, 0, 256);
+
+ smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon);
+ spdu->StructureSize2 = cpu_to_le16(parmsize);
+
+ *total_len = parmsize + sizeof(struct smb2_sync_hdr);
+}
+
+/* init request without RFC1001 length at the beginning */
+static int
+smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
+ void **request_buf, unsigned int *total_len)
+{
+ int rc;
+ struct smb2_sync_hdr *shdr;
+
+ 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;
+ }
+
+ shdr = (struct smb2_sync_hdr *)(*request_buf);
+
+ fill_small_buf(smb2_command, tcon, shdr, total_len);
+
+ 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;
+}
+
+/*
+ * 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. The returned buffer
+ * has RFC1001 length at the beginning.
+ */
+static int
+small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
+ void **request_buf)
+{
+ int rc;
+ unsigned int total_len;
+ struct smb2_pdu *pdu;
+
+ 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;
+ }
+
+ pdu = (struct smb2_pdu *)(*request_buf);
+
+ fill_small_buf(smb2_command, tcon, get_sync_hdr(pdu), &total_len);
+
+ /* Note this is only network field converted to big endian */
+ pdu->hdr.smb2_buf_length = cpu_to_be32(total_len);
+
+ if (tcon != NULL) {
+#ifdef CONFIG_CIFS_STATS
+ 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;
+}
+
+#ifdef CONFIG_CIFS_SMB311
+/* offset is sizeof smb2_negotiate_req - 4 but rounded up to 8 bytes */
+#define OFFSET_OF_NEG_CONTEXT 0x68 /* sizeof(struct smb2_negotiate_req) - 4 */
+
+
+#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES cpu_to_le16(1)
+#define SMB2_ENCRYPTION_CAPABILITIES cpu_to_le16(2)
+
+static void
+build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
+{
+ pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
+ pneg_ctxt->DataLength = cpu_to_le16(38);
+ pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
+ pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
+ get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
+ pneg_ctxt->HashAlgorithms = SMB2_PREAUTH_INTEGRITY_SHA512;
+}
+
+static void
+build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
+{
+ pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
+ pneg_ctxt->DataLength = cpu_to_le16(6);
+ pneg_ctxt->CipherCount = cpu_to_le16(2);
+ pneg_ctxt->Ciphers[0] = SMB2_ENCRYPTION_AES128_GCM;
+ pneg_ctxt->Ciphers[1] = SMB2_ENCRYPTION_AES128_CCM;
+}
+
+static void
+assemble_neg_contexts(struct smb2_negotiate_req *req)
+{
+
+ /* +4 is to account for the RFC1001 len field */
+ char *pneg_ctxt = (char *)req + OFFSET_OF_NEG_CONTEXT + 4;
+
+ build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt);
+ /* Add 2 to size to round to 8 byte boundary */
+ pneg_ctxt += 2 + sizeof(struct smb2_preauth_neg_context);
+ build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt);
+ req->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
+ req->NegotiateContextCount = cpu_to_le16(2);
+ inc_rfc1001_len(req, 4 + sizeof(struct smb2_preauth_neg_context)
+ + sizeof(struct smb2_encryption_neg_context)); /* calculate hash */
+}
+#else
+static void assemble_neg_contexts(struct smb2_negotiate_req *req)
+{
+ return;
+}
+#endif /* SMB311 */
+
+/*
+ *
+ * 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];
+ struct kvec rsp_iov;
+ 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.sync_hdr.SessionId = 0;
+
+ if (strcmp(ses->server->vals->version_string,
+ SMB3ANY_VERSION_STRING) == 0) {
+ req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
+ req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
+ req->DialectCount = cpu_to_le16(2);
+ inc_rfc1001_len(req, 4);
+ } else if (strcmp(ses->server->vals->version_string,
+ SMBDEFAULT_VERSION_STRING) == 0) {
+ req->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
+ req->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
+ req->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
+ req->DialectCount = cpu_to_le16(3);
+ inc_rfc1001_len(req, 6);
+ } else {
+ /* otherwise send specific dialect */
+ req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
+ req->DialectCount = cpu_to_le16(1);
+ inc_rfc1001_len(req, 2);
+ }
+
+ /* only one of SMB2 signing flags may be set in SMB2 request */
+ if (ses->sign)
+ req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
+ else if (global_secflags & CIFSSEC_MAY_SIGN)
+ req->SecurityMode = cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
+ else
+ req->SecurityMode = 0;
+
+ req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
+
+ /* ClientGUID must be zero for SMB2.02 dialect */
+ if (ses->server->vals->protocol_id == SMB20_PROT_ID)
+ memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
+ else {
+ memcpy(req->ClientGUID, server->client_guid,
+ SMB2_CLIENT_GUID_SIZE);
+ if (ses->server->vals->protocol_id == SMB311_PROT_ID)
+ assemble_neg_contexts(req);
+ }
+ 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_iov);
+ cifs_small_buf_release(req);
+ rsp = (struct smb2_negotiate_rsp *)rsp_iov.iov_base;
+ /*
+ * No tcon so can't do
+ * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
+ */
+ if (rc == -EOPNOTSUPP) {
+ cifs_dbg(VFS, "Dialect not supported by server. Consider "
+ "specifying vers=1.0 or vers=2.0 on mount for accessing"
+ " older servers\n");
+ goto neg_exit;
+ } else if (rc != 0)
+ goto neg_exit;
+
+ if (strcmp(ses->server->vals->version_string,
+ SMB3ANY_VERSION_STRING) == 0) {
+ if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
+ cifs_dbg(VFS,
+ "SMB2 dialect returned but not requested\n");
+ return -EIO;
+ } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
+ cifs_dbg(VFS,
+ "SMB2.1 dialect returned but not requested\n");
+ return -EIO;
+ }
+ } else if (strcmp(ses->server->vals->version_string,
+ SMBDEFAULT_VERSION_STRING) == 0) {
+ if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID)) {
+ cifs_dbg(VFS,
+ "SMB2 dialect returned but not requested\n");
+ return -EIO;
+ } else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
+ /* ops set to 3.0 by default for default so update */
+ ses->server->ops = &smb21_operations;
+ ses->server->vals = &smb21_values;
+ }
+ } else if (le16_to_cpu(rsp->DialectRevision) !=
+ ses->server->vals->protocol_id) {
+ /* if requested single dialect ensure returned dialect matched */
+ cifs_dbg(VFS, "Illegal 0x%x dialect returned: not requested\n",
+ le16_to_cpu(rsp->DialectRevision));
+ return -EIO;
+ }
+
+ cifs_dbg(FYI, "mode 0x%x\n", rsp->SecurityMode);
+
+ 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 if (rsp->DialectRevision == cpu_to_le16(SMB302_PROT_ID))
+ cifs_dbg(FYI, "negotiated smb3.02 dialect\n");
+#ifdef CONFIG_CIFS_SMB311
+ else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
+ cifs_dbg(FYI, "negotiated smb3.1.1 dialect\n");
+#endif /* SMB311 */
+ else {
+ cifs_dbg(VFS, "Illegal dialect returned by server 0x%x\n",
+ le16_to_cpu(rsp->DialectRevision));
+ rc = -EIO;
+ goto neg_exit;
+ }
+ server->dialect = le16_to_cpu(rsp->DialectRevision);
+
+ /* BB: add check that dialect was valid given dialect(s) we asked for */
+
+ /* SMB2 only has an extended negflavor */
+ server->negflavor = CIFS_NEGFLAVOR_EXTENDED;
+ /* set it to the maximum buffer size value we can send with 1 credit */
+ server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
+ SMB2_MAX_BUFFER_SIZE);
+ 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);
+ /*
+ * See MS-SMB2 section 2.2.4: if no blob, client picks default which
+ * for us will be
+ * ses->sectype = RawNTLMSSP;
+ * but for time being this is our only auth choice so doesn't matter.
+ * We just found a server which sets blob length to zero expecting raw.
+ */
+ if (blob_length == 0) {
+ cifs_dbg(FYI, "missing security blob on negprot\n");
+ server->sec_ntlmssp = true;
+ }
+
+ rc = cifs_enable_signing(server, ses->sign);
+ if (rc)
+ goto neg_exit;
+ if (blob_length) {
+ rc = decode_negTokenInit(security_blob, blob_length, server);
+ if (rc == 1)
+ rc = 0;
+ else if (rc == 0)
+ rc = -EIO;
+ }
+neg_exit:
+ free_rsp_buf(resp_buftype, rsp);
+ return rc;
+}
+
+int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
+{
+ int rc = 0;
+ struct validate_negotiate_info_req vneg_inbuf;
+ struct validate_negotiate_info_rsp *pneg_rsp = NULL;
+ u32 rsplen;
+ u32 inbuflen; /* max of 4 dialects */
+
+ cifs_dbg(FYI, "validate negotiate\n");
+
+ /*
+ * validation ioctl must be signed, so no point sending this if we
+ * can not sign it (ie are not known user). Even if signing is not
+ * required (enabled but not negotiated), in those cases we selectively
+ * sign just this, the first and only signed request on a connection.
+ * Having validation of negotiate info helps reduce attack vectors.
+ */
+ if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST)
+ return 0; /* validation requires signing */
+
+ if (tcon->ses->user_name == NULL) {
+ cifs_dbg(FYI, "Can't validate negotiate: null user mount\n");
+ return 0; /* validation requires signing */
+ }
+
+ if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
+ cifs_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
+
+ vneg_inbuf.Capabilities =
+ cpu_to_le32(tcon->ses->server->vals->req_capabilities);
+ memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
+ SMB2_CLIENT_GUID_SIZE);
+
+ if (tcon->ses->sign)
+ vneg_inbuf.SecurityMode =
+ cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
+ else if (global_secflags & CIFSSEC_MAY_SIGN)
+ vneg_inbuf.SecurityMode =
+ cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
+ else
+ vneg_inbuf.SecurityMode = 0;
+
+
+ if (strcmp(tcon->ses->server->vals->version_string,
+ SMB3ANY_VERSION_STRING) == 0) {
+ vneg_inbuf.Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
+ vneg_inbuf.Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
+ vneg_inbuf.DialectCount = cpu_to_le16(2);
+ /* structure is big enough for 3 dialects, sending only 2 */
+ inbuflen = sizeof(struct validate_negotiate_info_req) - 2;
+ } else if (strcmp(tcon->ses->server->vals->version_string,
+ SMBDEFAULT_VERSION_STRING) == 0) {
+ vneg_inbuf.Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
+ vneg_inbuf.Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
+ vneg_inbuf.Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
+ vneg_inbuf.DialectCount = cpu_to_le16(3);
+ /* structure is big enough for 3 dialects */
+ inbuflen = sizeof(struct validate_negotiate_info_req);
+ } else {
+ /* otherwise specific dialect was requested */
+ vneg_inbuf.Dialects[0] =
+ cpu_to_le16(tcon->ses->server->vals->protocol_id);
+ vneg_inbuf.DialectCount = cpu_to_le16(1);
+ /* structure is big enough for 3 dialects, sending only 1 */
+ inbuflen = sizeof(struct validate_negotiate_info_req) - 4;
+ }
+
+ rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
+ FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
+ false /* use_ipc */,
+ (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
+ (char **)&pneg_rsp, &rsplen);
+
+ if (rc != 0) {
+ cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
+ return -EIO;
+ }
+
+ if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
+ cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n",
+ rsplen);
+
+ /* relax check since Mac returns max bufsize allowed on ioctl */
+ if ((rsplen > CIFSMaxBufSize)
+ || (rsplen < sizeof(struct validate_negotiate_info_rsp)))
+ goto err_rsp_free;
+ }
+
+ /* check validate negotiate info response matches what we got earlier */
+ if (pneg_rsp->Dialect != cpu_to_le16(tcon->ses->server->dialect))
+ goto vneg_out;
+
+ if (pneg_rsp->SecurityMode != cpu_to_le16(tcon->ses->server->sec_mode))
+ goto vneg_out;
+
+ /* do not validate server guid because not saved at negprot time yet */
+
+ if ((le32_to_cpu(pneg_rsp->Capabilities) | SMB2_NT_FIND |
+ SMB2_LARGE_FILES) != tcon->ses->server->capabilities)
+ goto vneg_out;
+
+ /* validate negotiate successful */
+ cifs_dbg(FYI, "validate negotiate info successful\n");
+ kfree(pneg_rsp);
+ return 0;
+
+vneg_out:
+ cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
+err_rsp_free:
+ kfree(pneg_rsp);
+ return -EIO;
+}
+
+enum securityEnum
+smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
+{
+ switch (requested) {
+ case Kerberos:
+ case RawNTLMSSP:
+ return requested;
+ case NTLMv2:
+ return RawNTLMSSP;
+ case Unspecified:
+ if (server->sec_ntlmssp &&
+ (global_secflags & CIFSSEC_MAY_NTLMSSP))
+ return RawNTLMSSP;
+ if ((server->sec_kerberos || server->sec_mskerberos) &&
+ (global_secflags & CIFSSEC_MAY_KRB5))
+ return Kerberos;
+ /* Fallthrough */
+ default:
+ return Unspecified;
+ }
+}
+
+struct SMB2_sess_data {
+ unsigned int xid;
+ struct cifs_ses *ses;
+ struct nls_table *nls_cp;
+ void (*func)(struct SMB2_sess_data *);
+ int result;
+ u64 previous_session;
+
+ /* we will send the SMB in three pieces:
+ * a fixed length beginning part, an optional
+ * SPNEGO blob (which can be zero length), and a
+ * last part which will include the strings
+ * and rest of bcc area. This allows us to avoid
+ * a large buffer 17K allocation
+ */
+ int buf0_type;
+ struct kvec iov[2];
+};
+
+static int
+SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
+{
+ int rc;
+ struct cifs_ses *ses = sess_data->ses;
+ struct smb2_sess_setup_req *req;
+ struct TCP_Server_Info *server = ses->server;
+
+ rc = small_smb2_init(SMB2_SESSION_SETUP, NULL, (void **) &req);
+ if (rc)
+ return rc;
+
+ /* First session, not a reauthenticate */
+ req->hdr.sync_hdr.SessionId = 0;
+
+ /* if reconnect, we need to send previous sess id, otherwise it is 0 */
+ req->PreviousSessionId = sess_data->previous_session;
+
+ req->Flags = 0; /* MBZ */
+ /* to enable echos and oplocks */
+ req->hdr.sync_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;
+
+#ifdef CONFIG_CIFS_DFS_UPCALL
+ req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS);
+#else
+ req->Capabilities = 0;
+#endif /* DFS_UPCALL */
+
+ req->Channel = 0; /* MBZ */
+
+ sess_data->iov[0].iov_base = (char *)req;
+ /* 4 for rfc1002 length field and 1 for pad */
+ sess_data->iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
+ /*
+ * This variable will be used to clear the buffer
+ * allocated above in case of any error in the calling function.
+ */
+ sess_data->buf0_type = CIFS_SMALL_BUFFER;
+
+ return 0;
+}
+
+static void
+SMB2_sess_free_buffer(struct SMB2_sess_data *sess_data)
+{
+ free_rsp_buf(sess_data->buf0_type, sess_data->iov[0].iov_base);
+ sess_data->buf0_type = CIFS_NO_BUFFER;
+}
+
+static int
+SMB2_sess_sendreceive(struct SMB2_sess_data *sess_data)
+{
+ int rc;
+ struct smb2_sess_setup_req *req = sess_data->iov[0].iov_base;
+ struct kvec rsp_iov = { NULL, 0 };
+
+ /* 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(sess_data->iov[1].iov_len);
+
+ inc_rfc1001_len(req, sess_data->iov[1].iov_len - 1 /* pad */);
+
+ /* BB add code to build os and lm fields */
+
+ rc = SendReceive2(sess_data->xid, sess_data->ses,
+ sess_data->iov, 2,
+ &sess_data->buf0_type,
+ CIFS_LOG_ERROR | CIFS_NEG_OP, &rsp_iov);
+ cifs_small_buf_release(sess_data->iov[0].iov_base);
+ memcpy(&sess_data->iov[0], &rsp_iov, sizeof(struct kvec));
+
+ return rc;
+}
+
+static int
+SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
+{
+ int rc = 0;
+ struct cifs_ses *ses = sess_data->ses;
+
+ mutex_lock(&ses->server->srv_mutex);
+ if (ses->server->ops->generate_signingkey) {
+ rc = ses->server->ops->generate_signingkey(ses);
+ if (rc) {
+ cifs_dbg(FYI,
+ "SMB3 session key generation failed\n");
+ mutex_unlock(&ses->server->srv_mutex);
+ return rc;
+ }
+ }
+ if (!ses->server->session_estab) {
+ ses->server->sequence_number = 0x2;
+ ses->server->session_estab = true;
+ }
+ mutex_unlock(&ses->server->srv_mutex);
+
+ cifs_dbg(FYI, "SMB2/3 session established successfully\n");
+ spin_lock(&GlobalMid_Lock);
+ ses->status = CifsGood;
+ ses->need_reconnect = false;
+ spin_unlock(&GlobalMid_Lock);
+ return rc;
+}
+
+#ifdef CONFIG_CIFS_UPCALL
+static void
+SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
+{
+ int rc;
+ struct cifs_ses *ses = sess_data->ses;
+ struct cifs_spnego_msg *msg;
+ struct key *spnego_key = NULL;
+ struct smb2_sess_setup_rsp *rsp = NULL;
+
+ rc = SMB2_sess_alloc_buffer(sess_data);
+ if (rc)
+ goto out;
+
+ spnego_key = cifs_get_spnego_key(ses);
+ if (IS_ERR(spnego_key)) {
+ rc = PTR_ERR(spnego_key);
+ if (rc == -ENOKEY)
+ cifs_dbg(VFS, "Verify user has a krb5 ticket and keyutils is installed\n");
+ spnego_key = NULL;
+ goto out;
+ }
+
+ msg = spnego_key->payload.data[0];
+ /*
+ * check version field to make sure that cifs.upcall is
+ * sending us a response in an expected form
+ */
+ if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
+ cifs_dbg(VFS,
+ "bad cifs.upcall version. Expected %d got %d",
+ CIFS_SPNEGO_UPCALL_VERSION, msg->version);
+ rc = -EKEYREJECTED;
+ goto out_put_spnego_key;
+ }
+
+ ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
+ GFP_KERNEL);
+ if (!ses->auth_key.response) {
+ cifs_dbg(VFS,
+ "Kerberos can't allocate (%u bytes) memory",
+ msg->sesskey_len);
+ rc = -ENOMEM;
+ goto out_put_spnego_key;
+ }
+ ses->auth_key.len = msg->sesskey_len;
+
+ sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
+ sess_data->iov[1].iov_len = msg->secblob_len;
+
+ rc = SMB2_sess_sendreceive(sess_data);
+ if (rc)
+ goto out_put_spnego_key;
+
+ rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
+ ses->Suid = rsp->hdr.sync_hdr.SessionId;
+
+ ses->session_flags = le16_to_cpu(rsp->SessionFlags);
+
+ rc = SMB2_sess_establish_session(sess_data);
+out_put_spnego_key:
+ key_invalidate(spnego_key);
+ key_put(spnego_key);
+out:
+ sess_data->result = rc;
+ sess_data->func = NULL;
+ SMB2_sess_free_buffer(sess_data);
+}
+#else
+static void
+SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
+{
+ cifs_dbg(VFS, "Kerberos negotiated but upcall support disabled!\n");
+ sess_data->result = -EOPNOTSUPP;
+ sess_data->func = NULL;
+}
+#endif
+
+static void
+SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data);
+
+static void
+SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
+{
+ int rc;
+ struct cifs_ses *ses = sess_data->ses;
+ struct smb2_sess_setup_rsp *rsp = NULL;
+ char *ntlmssp_blob = NULL;
+ bool use_spnego = false; /* else use raw ntlmssp */
+ u16 blob_length = 0;
+
+ /*
+ * If memory allocation is successful, caller of this function
+ * frees it.
+ */
+ ses->ntlmssp = kmalloc(sizeof(struct ntlmssp_auth), GFP_KERNEL);
+ if (!ses->ntlmssp) {
+ rc = -ENOMEM;
+ goto out_err;
+ }
+ ses->ntlmssp->sesskey_per_smbsess = true;
+
+ rc = SMB2_sess_alloc_buffer(sess_data);
+ if (rc)
+ goto out_err;
+
+ ntlmssp_blob = kmalloc(sizeof(struct _NEGOTIATE_MESSAGE),
+ GFP_KERNEL);
+ if (ntlmssp_blob == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ build_ntlmssp_negotiate_blob(ntlmssp_blob, ses);
+ if (use_spnego) {
+ /* BB eventually need to add this */
+ cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
+ rc = -EOPNOTSUPP;
+ goto out;
+ } else {
+ blob_length = sizeof(struct _NEGOTIATE_MESSAGE);
+ /* with raw NTLMSSP we don't encapsulate in SPNEGO */
+ }
+ sess_data->iov[1].iov_base = ntlmssp_blob;
+ sess_data->iov[1].iov_len = blob_length;
+
+ rc = SMB2_sess_sendreceive(sess_data);
+ rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
+
+ /* If true, rc here is expected and not an error */
+ if (sess_data->buf0_type != CIFS_NO_BUFFER &&
+ rsp->hdr.sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
+ rc = 0;
+
+ if (rc)
+ goto out;
+
+ 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 out;
+ }
+ rc = decode_ntlmssp_challenge(rsp->Buffer,
+ le16_to_cpu(rsp->SecurityBufferLength), ses);
+ if (rc)
+ goto out;
+
+ cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
+
+
+ ses->Suid = rsp->hdr.sync_hdr.SessionId;
+ ses->session_flags = le16_to_cpu(rsp->SessionFlags);
+
+out:
+ kfree(ntlmssp_blob);
+ SMB2_sess_free_buffer(sess_data);
+ if (!rc) {
+ sess_data->result = 0;
+ sess_data->func = SMB2_sess_auth_rawntlmssp_authenticate;
+ return;
+ }
+out_err:
+ kfree(ses->ntlmssp);
+ ses->ntlmssp = NULL;
+ sess_data->result = rc;
+ sess_data->func = NULL;
+}
+
+static void
+SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
+{
+ int rc;
+ struct cifs_ses *ses = sess_data->ses;
+ struct smb2_sess_setup_req *req;
+ struct smb2_sess_setup_rsp *rsp = NULL;
+ unsigned char *ntlmssp_blob = NULL;
+ bool use_spnego = false; /* else use raw ntlmssp */
+ u16 blob_length = 0;
+
+ rc = SMB2_sess_alloc_buffer(sess_data);
+ if (rc)
+ goto out;
+
+ req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
+ req->hdr.sync_hdr.SessionId = ses->Suid;
+
+ rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
+ sess_data->nls_cp);
+ if (rc) {
+ cifs_dbg(FYI, "build_ntlmssp_auth_blob failed %d\n", rc);
+ goto out;
+ }
+
+ if (use_spnego) {
+ /* BB eventually need to add this */
+ cifs_dbg(VFS, "spnego not supported for SMB2 yet\n");
+ rc = -EOPNOTSUPP;
+ goto out;
+ }
+ sess_data->iov[1].iov_base = ntlmssp_blob;
+ sess_data->iov[1].iov_len = blob_length;
+
+ rc = SMB2_sess_sendreceive(sess_data);
+ if (rc)
+ goto out;
+
+ rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
+
+ ses->Suid = rsp->hdr.sync_hdr.SessionId;
+ ses->session_flags = le16_to_cpu(rsp->SessionFlags);
+
+ rc = SMB2_sess_establish_session(sess_data);
+out:
+ kfree(ntlmssp_blob);
+ SMB2_sess_free_buffer(sess_data);
+ kfree(ses->ntlmssp);
+ ses->ntlmssp = NULL;
+ sess_data->result = rc;
+ sess_data->func = NULL;
+}
+
+static int
+SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
+{
+ int type;
+
+ type = smb2_select_sectype(ses->server, ses->sectype);
+ cifs_dbg(FYI, "sess setup type %d\n", type);
+ if (type == Unspecified) {
+ cifs_dbg(VFS,
+ "Unable to select appropriate authentication method!");
+ return -EINVAL;
+ }
+
+ switch (type) {
+ case Kerberos:
+ sess_data->func = SMB2_auth_kerberos;
+ break;
+ case RawNTLMSSP:
+ sess_data->func = SMB2_sess_auth_rawntlmssp_negotiate;
+ break;
+ default:
+ cifs_dbg(VFS, "secType %d not supported!\n", type);
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+int
+SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
+ const struct nls_table *nls_cp)
+{
+ int rc = 0;
+ struct TCP_Server_Info *server = ses->server;
+ struct SMB2_sess_data *sess_data;
+
+ cifs_dbg(FYI, "Session Setup\n");
+
+ if (!server) {
+ WARN(1, "%s: server is NULL!\n", __func__);
+ return -EIO;
+ }
+
+ sess_data = kzalloc(sizeof(struct SMB2_sess_data), GFP_KERNEL);
+ if (!sess_data)
+ return -ENOMEM;
+
+ rc = SMB2_select_sec(ses, sess_data);
+ if (rc)
+ goto out;
+ sess_data->xid = xid;
+ sess_data->ses = ses;
+ sess_data->buf0_type = CIFS_NO_BUFFER;
+ sess_data->nls_cp = (struct nls_table *) nls_cp;
+ sess_data->previous_session = ses->Suid;
+
+ while (sess_data->func)
+ sess_data->func(sess_data);
+
+ if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
+ cifs_dbg(VFS, "signing requested but authenticated as guest\n");
+ rc = sess_data->result;
+out:
+ kfree(sess_data);
+ 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;
+ int flags = 0;
+
+ cifs_dbg(FYI, "disconnect session %p\n", ses);
+
+ if (ses && (ses->server))
+ server = ses->server;
+ else
+ return -EIO;
+
+ /* no need to send SMB logoff if uid already closed due to reconnect */
+ if (ses->need_reconnect)
+ goto smb2_session_already_dead;
+
+ 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.sync_hdr.SessionId = ses->Suid;
+
+ if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
+ flags |= CIFS_TRANSFORM_REQ;
+ else if (server->sign)
+ req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
+
+ rc = SendReceiveNoRsp(xid, ses, (char *) req, flags);
+ cifs_small_buf_release(req);
+ /*
+ * No tcon so can't do
+ * cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_fail[SMB2...]);
+ */
+
+smb2_session_already_dead:
+ 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 */)
+
+/* These are similar values to what Windows uses */
+static inline void init_copy_chunk_defaults(struct cifs_tcon *tcon)
+{
+ tcon->max_chunks = 256;
+ tcon->max_bytes_chunk = 1048576;
+ tcon->max_bytes_copy = 16777216;
+}
+
+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];
+ struct kvec rsp_iov = { NULL, 0 };
+ int rc = 0;
+ int resp_buftype;
+ int unc_path_len;
+ __le16 *unc_path = NULL;
+ int flags = 0;
+
+ cifs_dbg(FYI, "TCON\n");
+
+ if (!(ses->server) || !tree)
+ return -EIO;
+
+ 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;
+ }
+
+ /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
+ if (tcon)
+ tcon->tid = 0;
+
+ rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
+ if (rc) {
+ kfree(unc_path);
+ return rc;
+ }
+
+ if (tcon == NULL) {
+ if ((ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ /* since no tcon, smb2_init can not do this, so do here */
+ req->hdr.sync_hdr.SessionId = ses->Suid;
+ if (ses->server->sign)
+ req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
+ } else if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ 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, flags, &rsp_iov);
+ cifs_small_buf_release(req);
+ rsp = (struct smb2_tree_connect_rsp *)rsp_iov.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.sync_hdr.TreeId;
+ goto tcon_exit;
+ }
+
+ switch (rsp->ShareType) {
+ case SMB2_SHARE_TYPE_DISK:
+ cifs_dbg(FYI, "connection to disk share\n");
+ break;
+ case SMB2_SHARE_TYPE_PIPE:
+ tcon->ipc = true;
+ cifs_dbg(FYI, "connection to pipe share\n");
+ break;
+ case SMB2_SHARE_TYPE_PRINT:
+ tcon->ipc = true;
+ cifs_dbg(FYI, "connection to printer\n");
+ break;
+ default:
+ 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->capabilities = rsp->Capabilities; /* we keep caps little endian */
+ tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
+ tcon->tidStatus = CifsGood;
+ tcon->need_reconnect = false;
+ tcon->tid = rsp->hdr.sync_hdr.TreeId;
+ strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
+
+ if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
+ ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
+ cifs_dbg(VFS, "DFS capability contradicts DFS flag\n");
+
+ if (tcon->seal &&
+ !(tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
+ cifs_dbg(VFS, "Encryption is requested but not supported\n");
+
+ init_copy_chunk_defaults(tcon);
+ if (tcon->ses->server->ops->validate_negotiate)
+ rc = tcon->ses->server->ops->validate_negotiate(xid, tcon);
+tcon_exit:
+ free_rsp_buf(resp_buftype, rsp);
+ kfree(unc_path);
+ return rc;
+
+tcon_error_exit:
+ if (rsp && rsp->hdr.sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
+ cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
+ }
+ 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 cifs_ses *ses = tcon->ses;
+ int flags = 0;
+
+ cifs_dbg(FYI, "Tree Disconnect\n");
+
+ if (!ses || !(ses->server))
+ 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;
+
+ if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ rc = SendReceiveNoRsp(xid, ses, (char *)req, flags);
+ cifs_small_buf_release(req);
+ if (rc)
+ cifs_stats_fail_inc(tcon, SMB2_TREE_DISCONNECT_HE);
+
+ return rc;
+}
+
+
+static struct create_durable *
+create_durable_buf(void)
+{
+ struct create_durable *buf;
+
+ buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
+ if (!buf)
+ return NULL;
+
+ buf->ccontext.DataOffset = cpu_to_le16(offsetof
+ (struct create_durable, Data));
+ buf->ccontext.DataLength = cpu_to_le32(16);
+ buf->ccontext.NameOffset = cpu_to_le16(offsetof
+ (struct create_durable, Name));
+ buf->ccontext.NameLength = cpu_to_le16(4);
+ /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DHnQ" */
+ buf->Name[0] = 'D';
+ buf->Name[1] = 'H';
+ buf->Name[2] = 'n';
+ buf->Name[3] = 'Q';
+ return buf;
+}
+
+static struct create_durable *
+create_reconnect_durable_buf(struct cifs_fid *fid)
+{
+ struct create_durable *buf;
+
+ buf = kzalloc(sizeof(struct create_durable), GFP_KERNEL);
+ if (!buf)
+ return NULL;
+
+ buf->ccontext.DataOffset = cpu_to_le16(offsetof
+ (struct create_durable, Data));
+ buf->ccontext.DataLength = cpu_to_le32(16);
+ buf->ccontext.NameOffset = cpu_to_le16(offsetof
+ (struct create_durable, Name));
+ buf->ccontext.NameLength = cpu_to_le16(4);
+ buf->Data.Fid.PersistentFileId = fid->persistent_fid;
+ buf->Data.Fid.VolatileFileId = fid->volatile_fid;
+ /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT is "DHnC" */
+ buf->Name[0] = 'D';
+ buf->Name[1] = 'H';
+ buf->Name[2] = 'n';
+ buf->Name[3] = 'C';
+ return buf;
+}
+
+static __u8
+parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
+ unsigned int *epoch)
+{
+ char *data_offset;
+ struct create_context *cc;
+ unsigned int next;
+ unsigned int remaining;
+ char *name;
+
+ data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
+ remaining = le32_to_cpu(rsp->CreateContextsLength);
+ cc = (struct create_context *)data_offset;
+ while (remaining >= sizeof(struct create_context)) {
+ name = le16_to_cpu(cc->NameOffset) + (char *)cc;
+ if (le16_to_cpu(cc->NameLength) == 4 &&
+ strncmp(name, "RqLs", 4) == 0)
+ return server->ops->parse_lease_buf(cc, epoch);
+
+ next = le32_to_cpu(cc->Next);
+ if (!next)
+ break;
+ remaining -= next;
+ cc = (struct create_context *)((char *)cc + next);
+ }
+
+ return 0;
+}
+
+static int
+add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
+ unsigned int *num_iovec, __u8 *oplock)
+{
+ struct smb2_create_req *req = iov[0].iov_base;
+ unsigned int num = *num_iovec;
+
+ iov[num].iov_base = server->ops->create_lease_buf(oplock+1, *oplock);
+ if (iov[num].iov_base == NULL)
+ return -ENOMEM;
+ iov[num].iov_len = server->vals->create_lease_size;
+ req->RequestedOplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
+ if (!req->CreateContextsOffset)
+ req->CreateContextsOffset = cpu_to_le32(
+ sizeof(struct smb2_create_req) - 4 +
+ iov[num - 1].iov_len);
+ le32_add_cpu(&req->CreateContextsLength,
+ server->vals->create_lease_size);
+ inc_rfc1001_len(&req->hdr, server->vals->create_lease_size);
+ *num_iovec = num + 1;
+ return 0;
+}
+
+static struct create_durable_v2 *
+create_durable_v2_buf(struct cifs_fid *pfid)
+{
+ struct create_durable_v2 *buf;
+
+ buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
+ if (!buf)
+ return NULL;
+
+ buf->ccontext.DataOffset = cpu_to_le16(offsetof
+ (struct create_durable_v2, dcontext));
+ buf->ccontext.DataLength = cpu_to_le32(sizeof(struct durable_context_v2));
+ buf->ccontext.NameOffset = cpu_to_le16(offsetof
+ (struct create_durable_v2, Name));
+ buf->ccontext.NameLength = cpu_to_le16(4);
+
+ buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
+ buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
+ generate_random_uuid(buf->dcontext.CreateGuid);
+ memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
+
+ /* SMB2_CREATE_DURABLE_HANDLE_REQUEST is "DH2Q" */
+ buf->Name[0] = 'D';
+ buf->Name[1] = 'H';
+ buf->Name[2] = '2';
+ buf->Name[3] = 'Q';
+ return buf;
+}
+
+static struct create_durable_handle_reconnect_v2 *
+create_reconnect_durable_v2_buf(struct cifs_fid *fid)
+{
+ struct create_durable_handle_reconnect_v2 *buf;
+
+ buf = kzalloc(sizeof(struct create_durable_handle_reconnect_v2),
+ GFP_KERNEL);
+ if (!buf)
+ return NULL;
+
+ buf->ccontext.DataOffset =
+ cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
+ dcontext));
+ buf->ccontext.DataLength =
+ cpu_to_le32(sizeof(struct durable_reconnect_context_v2));
+ buf->ccontext.NameOffset =
+ cpu_to_le16(offsetof(struct create_durable_handle_reconnect_v2,
+ Name));
+ buf->ccontext.NameLength = cpu_to_le16(4);
+
+ buf->dcontext.Fid.PersistentFileId = fid->persistent_fid;
+ buf->dcontext.Fid.VolatileFileId = fid->volatile_fid;
+ buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
+ memcpy(buf->dcontext.CreateGuid, fid->create_guid, 16);
+
+ /* SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2 is "DH2C" */
+ buf->Name[0] = 'D';
+ buf->Name[1] = 'H';
+ buf->Name[2] = '2';
+ buf->Name[3] = 'C';
+ return buf;
+}
+
+static int
+add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
+ struct cifs_open_parms *oparms)
+{
+ struct smb2_create_req *req = iov[0].iov_base;
+ unsigned int num = *num_iovec;
+
+ iov[num].iov_base = create_durable_v2_buf(oparms->fid);
+ if (iov[num].iov_base == NULL)
+ return -ENOMEM;
+ iov[num].iov_len = sizeof(struct create_durable_v2);
+ if (!req->CreateContextsOffset)
+ req->CreateContextsOffset =
+ cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
+ iov[1].iov_len);
+ le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable_v2));
+ inc_rfc1001_len(&req->hdr, sizeof(struct create_durable_v2));
+ *num_iovec = num + 1;
+ return 0;
+}
+
+static int
+add_durable_reconnect_v2_context(struct kvec *iov, unsigned int *num_iovec,
+ struct cifs_open_parms *oparms)
+{
+ struct smb2_create_req *req = iov[0].iov_base;
+ unsigned int num = *num_iovec;
+
+ /* indicate that we don't need to relock the file */
+ oparms->reconnect = false;
+
+ iov[num].iov_base = create_reconnect_durable_v2_buf(oparms->fid);
+ if (iov[num].iov_base == NULL)
+ return -ENOMEM;
+ iov[num].iov_len = sizeof(struct create_durable_handle_reconnect_v2);
+ if (!req->CreateContextsOffset)
+ req->CreateContextsOffset =
+ cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
+ iov[1].iov_len);
+ le32_add_cpu(&req->CreateContextsLength,
+ sizeof(struct create_durable_handle_reconnect_v2));
+ inc_rfc1001_len(&req->hdr,
+ sizeof(struct create_durable_handle_reconnect_v2));
+ *num_iovec = num + 1;
+ return 0;
+}
+
+static int
+add_durable_context(struct kvec *iov, unsigned int *num_iovec,
+ struct cifs_open_parms *oparms, bool use_persistent)
+{
+ struct smb2_create_req *req = iov[0].iov_base;
+ unsigned int num = *num_iovec;
+
+ if (use_persistent) {
+ if (oparms->reconnect)
+ return add_durable_reconnect_v2_context(iov, num_iovec,
+ oparms);
+ else
+ return add_durable_v2_context(iov, num_iovec, oparms);
+ }
+
+ if (oparms->reconnect) {
+ iov[num].iov_base = create_reconnect_durable_buf(oparms->fid);
+ /* indicate that we don't need to relock the file */
+ oparms->reconnect = false;
+ } else
+ iov[num].iov_base = create_durable_buf();
+ if (iov[num].iov_base == NULL)
+ return -ENOMEM;
+ iov[num].iov_len = sizeof(struct create_durable);
+ if (!req->CreateContextsOffset)
+ req->CreateContextsOffset =
+ cpu_to_le32(sizeof(struct smb2_create_req) - 4 +
+ iov[1].iov_len);
+ le32_add_cpu(&req->CreateContextsLength, sizeof(struct create_durable));
+ inc_rfc1001_len(&req->hdr, sizeof(struct create_durable));
+ *num_iovec = num + 1;
+ return 0;
+}
+
+static int
+alloc_path_with_tree_prefix(__le16 **out_path, int *out_size, int *out_len,
+ const char *treename, const __le16 *path)
+{
+ int treename_len, path_len;
+ struct nls_table *cp;
+ const __le16 sep[] = {cpu_to_le16('\\'), cpu_to_le16(0x0000)};
+
+ /*
+ * skip leading "\\"
+ */
+ treename_len = strlen(treename);
+ if (treename_len < 2 || !(treename[0] == '\\' && treename[1] == '\\'))
+ return -EINVAL;
+
+ treename += 2;
+ treename_len -= 2;
+
+ path_len = UniStrnlen((wchar_t *)path, PATH_MAX);
+
+ /*
+ * make room for one path separator between the treename and
+ * path
+ */
+ *out_len = treename_len + 1 + path_len;
+
+ /*
+ * final path needs to be null-terminated UTF16 with a
+ * size aligned to 8
+ */
+
+ *out_size = roundup((*out_len+1)*2, 8);
+ *out_path = kzalloc(*out_size, GFP_KERNEL);
+ if (!*out_path)
+ return -ENOMEM;
+
+ cp = load_nls_default();
+ cifs_strtoUTF16(*out_path, treename, treename_len, cp);
+ UniStrcat(*out_path, sep);
+ UniStrcat(*out_path, path);
+ unload_nls(cp);
+
+ return 0;
+}
+
+int
+SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
+ __u8 *oplock, struct smb2_file_all_info *buf,
+ struct smb2_err_rsp **err_buf)
+{
+ struct smb2_create_req *req;
+ struct smb2_create_rsp *rsp;
+ struct TCP_Server_Info *server;
+ struct cifs_tcon *tcon = oparms->tcon;
+ struct cifs_ses *ses = tcon->ses;
+ struct kvec iov[4];
+ struct kvec rsp_iov = {NULL, 0};
+ int resp_buftype;
+ int uni_path_len;
+ __le16 *copy_path = NULL;
+ int copy_size;
+ int rc = 0;
+ unsigned int n_iov = 2;
+ __u32 file_attributes = 0;
+ char *dhc_buf = NULL, *lc_buf = NULL;
+ int flags = 0;
+
+ 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;
+
+ if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ if (oparms->create_options & CREATE_OPTION_READONLY)
+ file_attributes |= ATTR_READONLY;
+ if (oparms->create_options & CREATE_OPTION_SPECIAL)
+ file_attributes |= ATTR_SYSTEM;
+
+ req->ImpersonationLevel = IL_IMPERSONATION;
+ req->DesiredAccess = cpu_to_le32(oparms->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(oparms->disposition);
+ req->CreateOptions = cpu_to_le32(oparms->create_options & CREATE_OPTIONS_MASK);
+
+ iov[0].iov_base = (char *)req;
+ /* 4 for rfc1002 length field */
+ iov[0].iov_len = get_rfc1002_length(req) + 4;
+ /* -1 since last byte is buf[0] which is sent below (path) */
+ iov[0].iov_len--;
+
+ req->NameOffset = cpu_to_le16(sizeof(struct smb2_create_req) - 4);
+
+ /* [MS-SMB2] 2.2.13 NameOffset:
+ * If SMB2_FLAGS_DFS_OPERATIONS is set in the Flags field of
+ * the SMB2 header, the file name includes a prefix that will
+ * be processed during DFS name normalization as specified in
+ * section 3.3.5.9. Otherwise, the file name is relative to
+ * the share that is identified by the TreeId in the SMB2
+ * header.
+ */
+ if (tcon->share_flags & SHI1005_FLAGS_DFS) {
+ int name_len;
+
+ req->hdr.sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
+ rc = alloc_path_with_tree_prefix(©_path, ©_size,
+ &name_len,
+ tcon->treeName, path);
+ if (rc) {
+ cifs_small_buf_release(req);
+ return rc;
+ }
+ req->NameLength = cpu_to_le16(name_len * 2);
+ uni_path_len = copy_size;
+ path = copy_path;
+ } else {
+ uni_path_len = (2 * UniStrnlen((wchar_t *)path, PATH_MAX)) + 2;
+ /* MUST set path len (NameLength) to 0 opening root of share */
+ req->NameLength = cpu_to_le16(uni_path_len - 2);
+ if (uni_path_len % 8 != 0) {
+ copy_size = roundup(uni_path_len, 8);
+ copy_path = kzalloc(copy_size, GFP_KERNEL);
+ if (!copy_path) {
+ cifs_small_buf_release(req);
+ 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);
+
+ if (!server->oplocks)
+ *oplock = SMB2_OPLOCK_LEVEL_NONE;
+
+ if (!(server->capabilities & SMB2_GLOBAL_CAP_LEASING) ||
+ *oplock == SMB2_OPLOCK_LEVEL_NONE)
+ req->RequestedOplockLevel = *oplock;
+ else if (!(server->capabilities & SMB2_GLOBAL_CAP_DIRECTORY_LEASING) &&
+ (oparms->create_options & CREATE_NOT_FILE))
+ req->RequestedOplockLevel = *oplock; /* no srv lease support */
+ else {
+ rc = add_lease_context(server, iov, &n_iov, oplock);
+ if (rc) {
+ cifs_small_buf_release(req);
+ kfree(copy_path);
+ return rc;
+ }
+ lc_buf = iov[n_iov-1].iov_base;
+ }
+
+ if (*oplock == SMB2_OPLOCK_LEVEL_BATCH) {
+ /* need to set Next field of lease context if we request it */
+ if (server->capabilities & SMB2_GLOBAL_CAP_LEASING) {
+ struct create_context *ccontext =
+ (struct create_context *)iov[n_iov-1].iov_base;
+ ccontext->Next =
+ cpu_to_le32(server->vals->create_lease_size);
+ }
+
+ rc = add_durable_context(iov, &n_iov, oparms,
+ tcon->use_persistent);
+ if (rc) {
+ cifs_small_buf_release(req);
+ kfree(copy_path);
+ kfree(lc_buf);
+ return rc;
+ }
+ dhc_buf = iov[n_iov-1].iov_base;
+ }
+
+ rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov);
+ cifs_small_buf_release(req);
+ rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
+
+ if (rc != 0) {
+ cifs_stats_fail_inc(tcon, SMB2_CREATE_HE);
+ if (err_buf && rsp)
+ *err_buf = kmemdup(rsp, get_rfc1002_length(rsp) + 4,
+ GFP_KERNEL);
+ goto creat_exit;
+ }
+
+ oparms->fid->persistent_fid = rsp->PersistentFileId;
+ oparms->fid->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(server, rsp, &oparms->fid->epoch);
+ else
+ *oplock = rsp->OplockLevel;
+creat_exit:
+ kfree(copy_path);
+ kfree(lc_buf);
+ kfree(dhc_buf);
+ free_rsp_buf(resp_buftype, rsp);
+ return rc;
+}
+
+/*
+ * SMB2 IOCTL is used for both IOCTLs and FSCTLs
+ */
+int
+SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
+ u64 volatile_fid, u32 opcode, bool is_fsctl, bool use_ipc,
+ char *in_data, u32 indatalen,
+ char **out_data, u32 *plen /* returned data len */)
+{
+ struct smb2_ioctl_req *req;
+ struct smb2_ioctl_rsp *rsp;
+ struct smb2_sync_hdr *shdr;
+ struct cifs_ses *ses;
+ struct kvec iov[2];
+ struct kvec rsp_iov;
+ int resp_buftype;
+ int n_iov;
+ int rc = 0;
+ int flags = 0;
+
+ cifs_dbg(FYI, "SMB2 IOCTL\n");
+
+ if (out_data != NULL)
+ *out_data = NULL;
+
+ /* zero out returned data len, in case of error */
+ if (plen)
+ *plen = 0;
+
+ if (tcon)
+ ses = tcon->ses;
+ else
+ return -EIO;
+
+ if (!ses || !(ses->server))
+ return -EIO;
+
+ rc = small_smb2_init(SMB2_IOCTL, tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ if (use_ipc) {
+ if (ses->ipc_tid == 0) {
+ cifs_small_buf_release(req);
+ return -ENOTCONN;
+ }
+
+ cifs_dbg(FYI, "replacing tid 0x%x with IPC tid 0x%x\n",
+ req->hdr.sync_hdr.TreeId, ses->ipc_tid);
+ req->hdr.sync_hdr.TreeId = ses->ipc_tid;
+ }
+ if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ req->CtlCode = cpu_to_le32(opcode);
+ req->PersistentFileId = persistent_fid;
+ req->VolatileFileId = volatile_fid;
+
+ if (indatalen) {
+ req->InputCount = cpu_to_le32(indatalen);
+ /* do not set InputOffset if no input data */
+ req->InputOffset =
+ cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer) - 4);
+ iov[1].iov_base = in_data;
+ iov[1].iov_len = indatalen;
+ n_iov = 2;
+ } else
+ n_iov = 1;
+
+ req->OutputOffset = 0;
+ req->OutputCount = 0; /* MBZ */
+
+ /*
+ * Could increase MaxOutputResponse, but that would require more
+ * than one credit. Windows typically sets this smaller, but for some
+ * ioctls it may be useful to allow server to send more. No point
+ * limiting what the server can send as long as fits in one credit
+ * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
+ * (by default, note that it can be overridden to make max larger)
+ * in responses (except for read responses which can be bigger.
+ * We may want to bump this limit up
+ */
+ req->MaxOutputResponse = cpu_to_le32(CIFSMaxBufSize);
+
+ if (is_fsctl)
+ req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
+ else
+ req->Flags = 0;
+
+ iov[0].iov_base = (char *)req;
+
+ /*
+ * If no input data, the size of ioctl struct in
+ * protocol spec still includes a 1 byte data buffer,
+ * but if input data passed to ioctl, we do not
+ * want to double count this, so we do not send
+ * the dummy one byte of data in iovec[0] if sending
+ * input data (in iovec[1]). We also must add 4 bytes
+ * in first iovec to allow for rfc1002 length field.
+ */
+
+ if (indatalen) {
+ iov[0].iov_len = get_rfc1002_length(req) + 4 - 1;
+ inc_rfc1001_len(req, indatalen - 1);
+ } else
+ iov[0].iov_len = get_rfc1002_length(req) + 4;
+
+ /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
+ if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
+ req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
+
+ rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov);
+ cifs_small_buf_release(req);
+ rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
+
+ if ((rc != 0) && (rc != -EINVAL)) {
+ cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
+ goto ioctl_exit;
+ } else if (rc == -EINVAL) {
+ if ((opcode != FSCTL_SRV_COPYCHUNK_WRITE) &&
+ (opcode != FSCTL_SRV_COPYCHUNK)) {
+ cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
+ goto ioctl_exit;
+ }
+ }
+
+ /* check if caller wants to look at return data or just return rc */
+ if ((plen == NULL) || (out_data == NULL))
+ goto ioctl_exit;
+
+ *plen = le32_to_cpu(rsp->OutputCount);
+
+ /* We check for obvious errors in the output buffer length and offset */
+ if (*plen == 0)
+ goto ioctl_exit; /* server returned no data */
+ else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) {
+ cifs_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
+ *plen = 0;
+ rc = -EIO;
+ goto ioctl_exit;
+ }
+
+ if (get_rfc1002_length(rsp) - *plen < le32_to_cpu(rsp->OutputOffset)) {
+ cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
+ le32_to_cpu(rsp->OutputOffset));
+ *plen = 0;
+ rc = -EIO;
+ goto ioctl_exit;
+ }
+
+ *out_data = kmalloc(*plen, GFP_KERNEL);
+ if (*out_data == NULL) {
+ rc = -ENOMEM;
+ goto ioctl_exit;
+ }
+
+ shdr = get_sync_hdr(rsp);
+ memcpy(*out_data, (char *)shdr + le32_to_cpu(rsp->OutputOffset), *plen);
+ioctl_exit:
+ free_rsp_buf(resp_buftype, rsp);
+ return rc;
+}
+
+/*
+ * Individual callers to ioctl worker function follow
+ */
+
+int
+SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid)
+{
+ int rc;
+ struct compress_ioctl fsctl_input;
+ char *ret_data = NULL;
+
+ fsctl_input.CompressionState =
+ cpu_to_le16(COMPRESSION_FORMAT_DEFAULT);
+
+ rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
+ FSCTL_SET_COMPRESSION, true /* is_fsctl */,
+ false /* use_ipc */,
+ (char *)&fsctl_input /* data input */,
+ 2 /* in data len */, &ret_data /* out data */, NULL);
+
+ cifs_dbg(FYI, "set compression rc %d\n", rc);
+
+ 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 cifs_ses *ses = tcon->ses;
+ struct kvec iov[1];
+ struct kvec rsp_iov;
+ int resp_buftype;
+ int rc = 0;
+ int flags = 0;
+
+ cifs_dbg(FYI, "Close\n");
+
+ if (!ses || !(ses->server))
+ return -EIO;
+
+ rc = small_smb2_init(SMB2_CLOSE, tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ 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, flags, &rsp_iov);
+ cifs_small_buf_release(req);
+ rsp = (struct smb2_close_rsp *)rsp_iov.iov_base;
+
+ if (rc != 0) {
+ 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, u8 info_type,
+ u32 additional_info, size_t output_len, size_t min_len, void **data,
+ u32 *dlen)
+{
+ struct smb2_query_info_req *req;
+ struct smb2_query_info_rsp *rsp = NULL;
+ struct kvec iov[2];
+ struct kvec rsp_iov;
+ int rc = 0;
+ int resp_buftype;
+ struct cifs_ses *ses = tcon->ses;
+ int flags = 0;
+
+ cifs_dbg(FYI, "Query Info\n");
+
+ if (!ses || !(ses->server))
+ return -EIO;
+
+ rc = small_smb2_init(SMB2_QUERY_INFO, tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ req->InfoType = info_type;
+ req->FileInfoClass = info_class;
+ req->PersistentFileId = persistent_fid;
+ req->VolatileFileId = volatile_fid;
+ req->AdditionalInformation = cpu_to_le32(additional_info);
+
+ /*
+ * We do not use the input buffer (do not send extra byte)
+ */
+ req->InputBufferOffset = 0;
+ inc_rfc1001_len(req, -1);
+
+ 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, flags, &rsp_iov);
+ cifs_small_buf_release(req);
+ rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
+
+ if (rc) {
+ cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
+ goto qinf_exit;
+ }
+
+ if (dlen) {
+ *dlen = le32_to_cpu(rsp->OutputBufferLength);
+ if (!*data) {
+ *data = kmalloc(*dlen, GFP_KERNEL);
+ if (!*data) {
+ cifs_dbg(VFS,
+ "Error %d allocating memory for acl\n",
+ rc);
+ *dlen = 0;
+ 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_eas(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid,
+ int ea_buf_size, struct smb2_file_full_ea_info *data)
+{
+ return query_info(xid, tcon, persistent_fid, volatile_fid,
+ FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, 0,
+ ea_buf_size,
+ sizeof(struct smb2_file_full_ea_info),
+ (void **)&data,
+ NULL);
+}
+
+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, SMB2_O_INFO_FILE, 0,
+ sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
+ sizeof(struct smb2_file_all_info), (void **)&data,
+ NULL);
+}
+
+int
+SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid,
+ void **data, u32 *plen)
+{
+ __u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
+ *plen = 0;
+
+ return query_info(xid, tcon, persistent_fid, volatile_fid,
+ 0, SMB2_O_INFO_SECURITY, additional_info,
+ SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
+}
+
+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, SMB2_O_INFO_FILE, 0,
+ sizeof(struct smb2_file_internal_info),
+ sizeof(struct smb2_file_internal_info),
+ (void **)&uniqueid, NULL);
+}
+
+/*
+ * 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 *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
+ unsigned int credits_received = 1;
+
+ if (mid->mid_state == MID_RESPONSE_RECEIVED)
+ credits_received = le16_to_cpu(rsp->hdr.sync_hdr.CreditRequest);
+
+ DeleteMidQEntry(mid);
+ add_credits(server, credits_received, CIFS_ECHO_OP);
+}
+
+void smb2_reconnect_server(struct work_struct *work)
+{
+ struct TCP_Server_Info *server = container_of(work,
+ struct TCP_Server_Info, reconnect.work);
+ struct cifs_ses *ses;
+ struct cifs_tcon *tcon, *tcon2;
+ struct list_head tmp_list;
+ int tcon_exist = false;
+ int rc;
+ int resched = false;
+
+
+ /* Prevent simultaneous reconnects that can corrupt tcon->rlist list */
+ mutex_lock(&server->reconnect_mutex);
+
+ INIT_LIST_HEAD(&tmp_list);
+ cifs_dbg(FYI, "Need negotiate, reconnecting tcons\n");
+
+ spin_lock(&cifs_tcp_ses_lock);
+ list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+ list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+ if (tcon->need_reconnect || tcon->need_reopen_files) {
+ tcon->tc_count++;
+ list_add_tail(&tcon->rlist, &tmp_list);
+ tcon_exist = true;
+ }
+ }
+ }
+ /*
+ * Get the reference to server struct to be sure that the last call of
+ * cifs_put_tcon() in the loop below won't release the server pointer.
+ */
+ if (tcon_exist)
+ server->srv_count++;
+
+ spin_unlock(&cifs_tcp_ses_lock);
+
+ list_for_each_entry_safe(tcon, tcon2, &tmp_list, rlist) {
+ rc = smb2_reconnect(SMB2_INTERNAL_CMD, tcon);
+ if (!rc)
+ cifs_reopen_persistent_handles(tcon);
+ else
+ resched = true;
+ list_del_init(&tcon->rlist);
+ cifs_put_tcon(tcon);
+ }
+
+ cifs_dbg(FYI, "Reconnecting tcons finished\n");
+ if (resched)
+ queue_delayed_work(cifsiod_wq, &server->reconnect, 2 * HZ);
+ mutex_unlock(&server->reconnect_mutex);
+
+ /* now we can safely release srv struct */
+ if (tcon_exist)
+ cifs_put_tcp_session(server, 1);
+}
+
+int
+SMB2_echo(struct TCP_Server_Info *server)
+{
+ struct smb2_echo_req *req;
+ int rc = 0;
+ struct kvec iov[2];
+ struct smb_rqst rqst = { .rq_iov = iov,
+ .rq_nvec = 2 };
+
+ cifs_dbg(FYI, "In echo request\n");
+
+ if (server->tcpStatus == CifsNeedNegotiate) {
+ /* No need to send echo on newly established connections */
+ queue_delayed_work(cifsiod_wq, &server->reconnect, 0);
+ return rc;
+ }
+
+ rc = small_smb2_init(SMB2_ECHO, NULL, (void **)&req);
+ if (rc)
+ return rc;
+
+ req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
+
+ /* 4 for rfc1002 length field */
+ iov[0].iov_len = 4;
+ iov[0].iov_base = (char *)req;
+ iov[1].iov_len = get_rfc1002_length(req);
+ iov[1].iov_base = (char *)req + 4;
+
+ rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
+ 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 cifs_ses *ses = tcon->ses;
+ struct kvec iov[1];
+ struct kvec rsp_iov;
+ int resp_buftype;
+ int rc = 0;
+ int flags = 0;
+
+ cifs_dbg(FYI, "Flush\n");
+
+ if (!ses || !(ses->server))
+ return -EIO;
+
+ rc = small_smb2_init(SMB2_FLUSH, tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ 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, flags, &rsp_iov);
+ cifs_small_buf_release(req);
+
+ if (rc != 0)
+ cifs_stats_fail_inc(tcon, SMB2_FLUSH_HE);
+
+ free_rsp_buf(resp_buftype, rsp_iov.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(void **buf, unsigned int *total_len,
+ struct cifs_io_parms *io_parms, unsigned int remaining_bytes,
+ int request_type)
+{
+ int rc = -EACCES;
+ struct smb2_read_plain_req *req = NULL;
+ struct smb2_sync_hdr *shdr;
+
+ rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, (void **) &req,
+ total_len);
+ if (rc)
+ return rc;
+ if (io_parms->tcon->ses->server == NULL)
+ return -ECONNABORTED;
+
+ shdr = &req->sync_hdr;
+ shdr->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)) {
+ /* next 8-byte aligned request */
+ *total_len = DIV_ROUND_UP(*total_len, 8) * 8;
+ shdr->NextCommand = cpu_to_le32(*total_len);
+ } else /* END_OF_CHAIN */
+ shdr->NextCommand = 0;
+ if (request_type & RELATED_REQUEST) {
+ shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
+ /*
+ * Related requests use info from previous read request
+ * in chain.
+ */
+ shdr->SessionId = 0xFFFFFFFF;
+ shdr->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;
+
+ *buf = req;
+ 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_sync_hdr *shdr =
+ (struct smb2_sync_hdr *)rdata->iov[1].iov_base;
+ unsigned int credits_received = 1;
+ struct smb_rqst rqst = { .rq_iov = rdata->iov,
+ .rq_nvec = 2,
+ .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(shdr->CreditRequest);
+ /* result already set, check signature */
+ if (server->sign && !mid->decrypted) {
+ 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->got_bytes);
+ cifs_stats_bytes_read(tcon, rdata->got_bytes);
+ break;
+ case MID_REQUEST_SUBMITTED:
+ case MID_RETRY_NEEDED:
+ rdata->result = -EAGAIN;
+ if (server->sign && rdata->got_bytes)
+ /* reset bytes number since we can not check a sign */
+ rdata->got_bytes = 0;
+ /* FIXME: should this be counted toward the initiating task? */
+ task_io_account_read(rdata->got_bytes);
+ cifs_stats_bytes_read(tcon, rdata->got_bytes);
+ 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 read, and set up mid to handle result */
+int
+smb2_async_readv(struct cifs_readdata *rdata)
+{
+ int rc, flags = 0;
+ char *buf;
+ struct smb2_sync_hdr *shdr;
+ struct cifs_io_parms io_parms;
+ struct smb_rqst rqst = { .rq_iov = rdata->iov,
+ .rq_nvec = 2 };
+ struct TCP_Server_Info *server;
+ unsigned int total_len;
+ __be32 req_len;
+
+ 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;
+
+ server = io_parms.tcon->ses->server;
+
+ rc = smb2_new_read_req((void **) &buf, &total_len, &io_parms, 0, 0);
+ if (rc) {
+ if (rc == -EAGAIN && rdata->credits) {
+ /* credits was reset by reconnect */
+ rdata->credits = 0;
+ /* reduce in_flight value since we won't send the req */
+ spin_lock(&server->req_lock);
+ server->in_flight--;
+ spin_unlock(&server->req_lock);
+ }
+ return rc;
+ }
+
+ if (encryption_required(io_parms.tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ req_len = cpu_to_be32(total_len);
+
+ rdata->iov[0].iov_base = &req_len;
+ rdata->iov[0].iov_len = sizeof(__be32);
+ rdata->iov[1].iov_base = buf;
+ rdata->iov[1].iov_len = total_len;
+
+ shdr = (struct smb2_sync_hdr *)buf;
+
+ if (rdata->credits) {
+ shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
+ SMB2_MAX_BUFFER_SIZE));
+ shdr->CreditRequest =
+ cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
+ spin_lock(&server->req_lock);
+ server->credits += rdata->credits -
+ le16_to_cpu(shdr->CreditCharge);
+ spin_unlock(&server->req_lock);
+ wake_up(&server->request_q);
+ rdata->credits = le16_to_cpu(shdr->CreditCharge);
+ flags |= CIFS_HAS_CREDITS;
+ }
+
+ kref_get(&rdata->refcount);
+ rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
+ cifs_readv_receive, smb2_readv_callback,
+ smb3_handle_read_data, rdata, flags);
+ 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_plain_req *req = NULL;
+ struct smb2_read_rsp *rsp = NULL;
+ struct smb2_sync_hdr *shdr;
+ struct kvec iov[2];
+ struct kvec rsp_iov;
+ unsigned int total_len;
+ __be32 req_len;
+ struct smb_rqst rqst = { .rq_iov = iov,
+ .rq_nvec = 2 };
+ int flags = CIFS_LOG_ERROR;
+ struct cifs_ses *ses = io_parms->tcon->ses;
+
+ *nbytes = 0;
+ rc = smb2_new_read_req((void **)&req, &total_len, io_parms, 0, 0);
+ if (rc)
+ return rc;
+
+ if (encryption_required(io_parms->tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ req_len = cpu_to_be32(total_len);
+
+ iov[0].iov_base = &req_len;
+ iov[0].iov_len = sizeof(__be32);
+ iov[1].iov_base = req;
+ iov[1].iov_len = total_len;
+
+ rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
+ cifs_small_buf_release(req);
+
+ rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
+
+ if (rc) {
+ if (rc != -ENODATA) {
+ cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
+ cifs_dbg(VFS, "Send error in read = %d\n", rc);
+ }
+ free_rsp_buf(resp_buftype, rsp_iov.iov_base);
+ return rc == -ENODATA ? 0 : rc;
+ }
+
+ *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;
+ }
+
+ shdr = get_sync_hdr(rsp);
+
+ if (*buf) {
+ memcpy(*buf, (char *)shdr + rsp->DataOffset, *nbytes);
+ free_rsp_buf(resp_buftype, rsp_iov.iov_base);
+ } else if (resp_buftype != CIFS_NO_BUFFER) {
+ *buf = rsp_iov.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.sync_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,
+ void (*release)(struct kref *kref))
+{
+ int rc = -EACCES, flags = 0;
+ struct smb2_write_req *req = NULL;
+ struct smb2_sync_hdr *shdr;
+ struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
+ struct TCP_Server_Info *server = tcon->ses->server;
+ struct kvec iov[2];
+ struct smb_rqst rqst = { };
+
+ rc = small_smb2_init(SMB2_WRITE, tcon, (void **) &req);
+ if (rc) {
+ if (rc == -EAGAIN && wdata->credits) {
+ /* credits was reset by reconnect */
+ wdata->credits = 0;
+ /* reduce in_flight value since we won't send the req */
+ spin_lock(&server->req_lock);
+ server->in_flight--;
+ spin_unlock(&server->req_lock);
+ }
+ goto async_writev_out;
+ }
+
+ if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ shdr = get_sync_hdr(req);
+ shdr->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[0].iov_len = 4;
+ iov[0].iov_base = req;
+ iov[1].iov_len = get_rfc1002_length(req) - 1;
+ iov[1].iov_base = (char *)req + 4;
+
+ rqst.rq_iov = iov;
+ rqst.rq_nvec = 2;
+ 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 */);
+
+ if (wdata->credits) {
+ shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
+ SMB2_MAX_BUFFER_SIZE));
+ shdr->CreditRequest =
+ cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
+ spin_lock(&server->req_lock);
+ server->credits += wdata->credits -
+ le16_to_cpu(shdr->CreditCharge);
+ spin_unlock(&server->req_lock);
+ wake_up(&server->request_q);
+ wdata->credits = le16_to_cpu(shdr->CreditCharge);
+ flags |= CIFS_HAS_CREDITS;
+ }
+
+ kref_get(&wdata->refcount);
+ rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
+ wdata, flags);
+
+ if (rc) {
+ kref_put(&wdata->refcount, 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;
+ struct kvec rsp_iov;
+ int flags = 0;
+
+ *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;
+
+ if (encryption_required(io_parms->tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ req->hdr.sync_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, flags, &rsp_iov);
+ cifs_small_buf_release(req);
+ rsp = (struct smb2_write_rsp *)rsp_iov.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;
+ char *entryptr;
+ FILE_DIRECTORY_INFO *dir_info;
+
+ if (bufstart == NULL)
+ return 0;
+
+ entryptr = bufstart;
+
+ while (1) {
+ if (entryptr + next_offset < entryptr ||
+ entryptr + next_offset > end_of_buf ||
+ entryptr + next_offset + size > end_of_buf) {
+ cifs_dbg(VFS, "malformed search entry would overflow\n");
+ break;
+ }
+
+ entryptr = entryptr + next_offset;
+ dir_info = (FILE_DIRECTORY_INFO *)entryptr;
+
+ len = le32_to_cpu(dir_info->FileNameLength);
+ if (entryptr + len < entryptr ||
+ entryptr + len > end_of_buf ||
+ 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 = entryptr;
+ entrycount++;
+
+ next_offset = le32_to_cpu(dir_info->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];
+ struct kvec rsp_iov;
+ int rc = 0;
+ int len;
+ int resp_buftype = CIFS_NO_BUFFER;
+ 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;
+ int flags = 0;
+
+ if (ses && (ses->server))
+ server = ses->server;
+ else
+ return -EIO;
+
+ rc = small_smb2_init(SMB2_QUERY_DIRECTORY, tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ 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, flags, &rsp_iov);
+ cifs_small_buf_release(req);
+ rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
+
+ if (rc) {
+ if (rc == -ENODATA &&
+ rsp->hdr.sync_hdr.Status == STATUS_NO_MORE_FILES) {
+ srch_inf->endOfSearch = true;
+ rc = 0;
+ } else
+ 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");
+
+ 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, u8 info_class,
+ u8 info_type, u32 additional_info, unsigned int num,
+ void **data, unsigned int *size)
+{
+ struct smb2_set_info_req *req;
+ struct smb2_set_info_rsp *rsp = NULL;
+ struct kvec *iov;
+ struct kvec rsp_iov;
+ int rc = 0;
+ int resp_buftype;
+ unsigned int i;
+ struct cifs_ses *ses = tcon->ses;
+ int flags = 0;
+
+ if (!ses || !(ses->server))
+ 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;
+ }
+
+ if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ req->hdr.sync_hdr.ProcessId = cpu_to_le32(pid);
+
+ req->InfoType = info_type;
+ req->FileInfoClass = info_class;
+ req->PersistentFileId = persistent_fid;
+ req->VolatileFileId = volatile_fid;
+ req->AdditionalInformation = cpu_to_le32(additional_info);
+
+ /* 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, flags, &rsp_iov);
+ cifs_small_buf_release(req);
+ rsp = (struct smb2_set_info_rsp *)rsp_iov.iov_base;
+
+ if (rc != 0)
+ cifs_stats_fail_inc(tcon, SMB2_SET_INFO_HE);
+
+ 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, SMB2_O_INFO_FILE,
+ 0, 2, data, size);
+ kfree(data);
+ return rc;
+}
+
+int
+SMB2_rmdir(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid)
+{
+ __u8 delete_pending = 1;
+ void *data;
+ unsigned int size;
+
+ data = &delete_pending;
+ size = 1; /* sizeof __u8 */
+
+ return send_set_info(xid, tcon, persistent_fid, volatile_fid,
+ current->tgid, FILE_DISPOSITION_INFORMATION, SMB2_O_INFO_FILE,
+ 0, 1, &data, &size);
+}
+
+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, SMB2_O_INFO_FILE,
+ 0, 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, bool is_falloc)
+{
+ struct smb2_file_eof_info info;
+ void *data;
+ unsigned int size;
+
+ info.EndOfFile = *eof;
+
+ data = &info;
+ size = sizeof(struct smb2_file_eof_info);
+
+ if (is_falloc)
+ return send_set_info(xid, tcon, persistent_fid, volatile_fid,
+ pid, FILE_ALLOCATION_INFORMATION, SMB2_O_INFO_FILE,
+ 0, 1, &data, &size);
+ else
+ return send_set_info(xid, tcon, persistent_fid, volatile_fid,
+ pid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE,
+ 0, 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, SMB2_O_INFO_FILE,
+ 0, 1, (void **)&buf, &size);
+}
+
+int
+SMB2_set_acl(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid,
+ struct cifs_ntsd *pnntsd, int pacllen, int aclflag)
+{
+ return send_set_info(xid, tcon, persistent_fid, volatile_fid,
+ current->tgid, 0, SMB2_O_INFO_SECURITY, aclflag,
+ 1, (void **)&pnntsd, &pacllen);
+}
+
+int
+SMB2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid,
+ struct smb2_file_full_ea_info *buf, int len)
+{
+ return send_set_info(xid, tcon, persistent_fid, volatile_fid,
+ current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE,
+ 0, 1, (void **)&buf, &len);
+}
+
+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;
+ int flags = CIFS_OBREAK_OP;
+
+ cifs_dbg(FYI, "SMB2_oplock_break\n");
+ rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ req->VolatileFid = volatile_fid;
+ req->PersistentFid = persistent_fid;
+ req->OplockLevel = oplock_level;
+ req->hdr.sync_hdr.CreditRequest = cpu_to_le16(1);
+
+ rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, flags);
+ cifs_small_buf_release(req);
+
+ 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 = 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;
+ struct kvec rsp_iov;
+ int rc = 0;
+ int resp_buftype;
+ struct cifs_ses *ses = tcon->ses;
+ struct smb2_fs_full_size_info *info = NULL;
+ int flags = 0;
+
+ 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;
+
+ if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
+ cifs_small_buf_release(iov.iov_base);
+ if (rc) {
+ cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
+ goto qfsinf_exit;
+ }
+ rsp = (struct smb2_query_info_rsp *)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);
+
+qfsinf_exit:
+ free_rsp_buf(resp_buftype, rsp_iov.iov_base);
+ return rc;
+}
+
+int
+SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid, int level)
+{
+ struct smb2_query_info_rsp *rsp = NULL;
+ struct kvec iov;
+ struct kvec rsp_iov;
+ int rc = 0;
+ int resp_buftype, max_len, min_len;
+ struct cifs_ses *ses = tcon->ses;
+ unsigned int rsp_len, offset;
+ int flags = 0;
+
+ if (level == FS_DEVICE_INFORMATION) {
+ max_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
+ min_len = sizeof(FILE_SYSTEM_DEVICE_INFO);
+ } else if (level == FS_ATTRIBUTE_INFORMATION) {
+ max_len = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO);
+ min_len = MIN_FS_ATTR_INFO_SIZE;
+ } else if (level == FS_SECTOR_SIZE_INFORMATION) {
+ max_len = sizeof(struct smb3_fs_ss_info);
+ min_len = sizeof(struct smb3_fs_ss_info);
+ } else if (level == FS_VOLUME_INFORMATION) {
+ max_len = sizeof(struct smb3_fs_vol_info) + MAX_VOL_LABEL_LEN;
+ min_len = sizeof(struct smb3_fs_vol_info);
+ } else {
+ cifs_dbg(FYI, "Invalid qfsinfo level %d\n", level);
+ return -EINVAL;
+ }
+
+ rc = build_qfs_info_req(&iov, tcon, level, max_len,
+ persistent_fid, volatile_fid);
+ if (rc)
+ return rc;
+
+ if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ rc = SendReceive2(xid, ses, &iov, 1, &resp_buftype, flags, &rsp_iov);
+ cifs_small_buf_release(iov.iov_base);
+ if (rc) {
+ cifs_stats_fail_inc(tcon, SMB2_QUERY_INFO_HE);
+ goto qfsattr_exit;
+ }
+ rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
+
+ rsp_len = le32_to_cpu(rsp->OutputBufferLength);
+ offset = le16_to_cpu(rsp->OutputBufferOffset);
+ rc = validate_buf(offset, rsp_len, &rsp->hdr, min_len);
+ if (rc)
+ goto qfsattr_exit;
+
+ if (level == FS_ATTRIBUTE_INFORMATION)
+ memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
+ + (char *)&rsp->hdr, min_t(unsigned int,
+ rsp_len, max_len));
+ else if (level == FS_DEVICE_INFORMATION)
+ memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
+ + (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
+ else if (level == FS_SECTOR_SIZE_INFORMATION) {
+ struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
+ (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
+ tcon->ss_flags = le32_to_cpu(ss_info->Flags);
+ tcon->perf_sector_size =
+ le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
+ } else if (level == FS_VOLUME_INFORMATION) {
+ struct smb3_fs_vol_info *vol_info = (struct smb3_fs_vol_info *)
+ (offset + (char *)rsp);
+ tcon->vol_serial_number = vol_info->VolumeSerialNumber;
+ tcon->vol_create_time = vol_info->VolumeCreationTime;
+ }
+
+qfsattr_exit:
+ free_rsp_buf(resp_buftype, rsp_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];
+ struct kvec rsp_iov;
+ int resp_buf_type;
+ unsigned int count;
+ int flags = CIFS_NO_RESP;
+
+ cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
+
+ rc = small_smb2_init(SMB2_LOCK, tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ req->hdr.sync_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, flags,
+ &rsp_iov);
+ cifs_small_buf_release(req);
+ 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;
+ int flags = CIFS_OBREAK_OP;
+
+ cifs_dbg(FYI, "SMB2_lease_break\n");
+ rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
+ if (rc)
+ return rc;
+
+ if (encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ req->hdr.sync_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, flags);
+ cifs_small_buf_release(req);
+
+ if (rc) {
+ cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
+ cifs_dbg(FYI, "Send error in Lease Break = %d\n", rc);
+ }
+
+ return rc;
+}