Merge tag '5.16-rc-part1-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs updates from Steve French:

- reconnect fix for stable

- minor mount option fix

- debugging improvement for (TCP) connection issues

- refactoring of common code to help ksmbd

* tag '5.16-rc-part1-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
smb3: add dynamic trace points for socket connection
cifs: Move SMB2_Create definitions to the shared area
cifs: Move more definitions into the shared area
cifs: move NEGOTIATE_PROTOCOL definitions out into the common area
cifs: Create a new shared file holding smb2 pdu definitions
cifs: add mount parameter tcpnodelay
cifs: To match file servers, make sure the server hostname matches

fs/cifs/cifsfs.c

···
 #include <linux/key-type.h>
 #include "cifs_spnego.h"
 #include "fscache.h"
-#include "smb2pdu.h"
 #ifdef CONFIG_CIFS_DFS_UPCALL
 #include "dfs_cache.h"
 #endif

fs/cifs/cifsglob.h

···
 #include <crypto/internal/hash.h>
 #include <linux/scatterlist.h>
 #include <uapi/linux/cifs/cifs_mount.h>
+#include "../smbfs_common/smb2pdu.h"
 #include "smb2pdu.h"
 
 #define CIFS_MAGIC_NUMBER 0xFF534D42      /* the first four bytes of SMB PDUs */
···
 
 static inline void
 revert_current_mid_from_hdr(struct TCP_Server_Info *server,
-			    const struct smb2_sync_hdr *shdr)
+			    const struct smb2_hdr *shdr)
 {
 	unsigned int num = le16_to_cpu(shdr->CreditCharge);
 

fs/cifs/connect.c

···
 static unsigned int
 smb2_get_credits_from_hdr(char *buffer, struct TCP_Server_Info *server)
 {
-	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buffer;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buffer;
 
 	/*
 	 * SMB1 does not use credits.
···
 		 */
 	}
 
-	kfree(server->hostname);
 	kfree(server);
 
 	length = atomic_dec_return(&tcpSesAllocCount);
···
 static void
 smb2_add_credits_from_hdr(char *buffer, struct TCP_Server_Info *server)
 {
-	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buffer;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buffer;
 	int scredits, in_flight;
 
 	/*
···
 	if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
 		return 0;
 
+	if (strcasecmp(server->hostname, ctx->server_hostname))
+		return 0;
+
 	if (!match_address(server, addr,
 			   (struct sockaddr *)&ctx->srcaddr))
 		return 0;
···
 	kfree(server->session_key.response);
 	server->session_key.response = NULL;
 	server->session_key.len = 0;
+	kfree(server->hostname);
 
 	task = xchg(&server->tsk, NULL);
 	if (task)
···
 		goto out_err;
 	}
 
+	tcp_ses->hostname = kstrdup(ctx->server_hostname, GFP_KERNEL);
+	if (!tcp_ses->hostname) {
+		rc = -ENOMEM;
+		goto out_err;
+	}
+
 	tcp_ses->ops = ctx->ops;
 	tcp_ses->vals = ctx->vals;
 	cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
-	tcp_ses->hostname = extract_hostname(ctx->UNC);
-	if (IS_ERR(tcp_ses->hostname)) {
-		rc = PTR_ERR(tcp_ses->hostname);
-		goto out_err_crypto_release;
-	}
 
 	tcp_ses->conn_id = atomic_inc_return(&tcpSesNextId);
 	tcp_ses->noblockcnt = ctx->rootfs;
···
 
 out_err:
 	if (tcp_ses) {
-		if (!IS_ERR(tcp_ses->hostname))
-			kfree(tcp_ses->hostname);
+		kfree(tcp_ses->hostname);
 		if (tcp_ses->ssocket)
 			sock_release(tcp_ses->ssocket);
 		kfree(tcp_ses);
···
 		rc = 0;
 	if (rc < 0) {
 		cifs_dbg(FYI, "Error %d connecting to server\n", rc);
+		trace_smb3_connect_err(server->hostname, server->conn_id, &server->dstaddr, rc);
 		sock_release(socket);
 		server->ssocket = NULL;
 		return rc;
 	}
-
+	trace_smb3_connect_done(server->hostname, server->conn_id, &server->dstaddr);
 	if (sport == htons(RFC1001_PORT))
 		rc = ip_rfc1001_connect(server);
 

fs/cifs/fs_context.c

···
 	fsparam_flag("nosharesock", Opt_nosharesock),
 	fsparam_flag_no("persistenthandles", Opt_persistent),
 	fsparam_flag_no("resilienthandles", Opt_resilient),
+	fsparam_flag_no("tcpnodelay", Opt_tcp_nodelay),
 	fsparam_flag("domainauto", Opt_domainauto),
 	fsparam_flag("rdma", Opt_rdma),
 	fsparam_flag("modesid", Opt_modesid),
···
 	DUP_CTX_STR(mount_options);
 	DUP_CTX_STR(username);
 	DUP_CTX_STR(password);
+	DUP_CTX_STR(server_hostname);
 	DUP_CTX_STR(UNC);
 	DUP_CTX_STR(source);
 	DUP_CTX_STR(domainname);
···
 	pos = strpbrk(devname + 2, delims);
 	if (!pos)
 		return -EINVAL;
+
+	/* record the server hostname */
+	ctx->server_hostname = kstrndup(devname + 2, pos - devname - 2, GFP_KERNEL);
+	if (!ctx->server_hostname)
+		return -ENOMEM;
 
 	/* skip past delimiter */
 	++pos;
···
 			}
 		}
 		break;
+	case Opt_tcp_nodelay:
+		/* tcp nodelay should not usually be needed since we CORK/UNCORK the socket */
+		if (result.negated)
+			ctx->sockopt_tcp_nodelay = false;
+		else
+			ctx->sockopt_tcp_nodelay = true;
+		break;
 	case Opt_domainauto:
 		ctx->domainauto = true;
 		break;
···
 	ctx->username = NULL;
 	kfree_sensitive(ctx->password);
 	ctx->password = NULL;
+	kfree(ctx->server_hostname);
+	ctx->server_hostname = NULL;
 	kfree(ctx->UNC);
 	ctx->UNC = NULL;
 	kfree(ctx->source);

fs/cifs/fs_context.h

···
 	Opt_nosharesock,
 	Opt_persistent,
 	Opt_resilient,
+	Opt_tcp_nodelay,
 	Opt_domainauto,
 	Opt_rdma,
 	Opt_modesid,
···
 	char *password;
 	char *domainname;
 	char *source;
+	char *server_hostname;
 	char *UNC;
 	char *nodename;
 	char *iocharset;  /* local code page for mapping to and from Unicode */

fs/cifs/misc.c

···
 	 * SMB2 header is bigger than CIFS one - no problems to clean some
 	 * more bytes for CIFS.
 	 */
-	size_t buf_size = sizeof(struct smb2_sync_hdr);
+	size_t buf_size = sizeof(struct smb2_hdr);
 
 	/*
 	 * We could use negotiated size instead of max_msgsize -

fs/cifs/smb2maperror.c

···
 int
 map_smb2_to_linux_error(char *buf, bool log_err)
 {
-	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 	unsigned int i;
 	int rc = -EIO;
 	__le32 smb2err = shdr->Status;
 
 	if (smb2err == 0) {
-		trace_smb3_cmd_done(shdr->TreeId, shdr->SessionId,
-			le16_to_cpu(shdr->Command), le64_to_cpu(shdr->MessageId));
+		trace_smb3_cmd_done(le32_to_cpu(shdr->Id.SyncId.TreeId),
+			      le64_to_cpu(shdr->SessionId),
+			      le16_to_cpu(shdr->Command),
+			      le64_to_cpu(shdr->MessageId));
 		return 0;
 	}
 
···
 	cifs_dbg(FYI, "Mapping SMB2 status code 0x%08x to POSIX err %d\n",
 		 __le32_to_cpu(smb2err), rc);
 
-	trace_smb3_cmd_err(shdr->TreeId, shdr->SessionId,
-			le16_to_cpu(shdr->Command),
-			le64_to_cpu(shdr->MessageId), le32_to_cpu(smb2err), rc);
+	trace_smb3_cmd_err(le32_to_cpu(shdr->Id.SyncId.TreeId),
+			   le64_to_cpu(shdr->SessionId),
+			   le16_to_cpu(shdr->Command),
+			   le64_to_cpu(shdr->MessageId),
+			   le32_to_cpu(smb2err), rc);
 	return rc;
 }

fs/cifs/smb2misc.c

···
  *
  */
 #include <linux/ctype.h>
-#include "smb2pdu.h"
 #include "cifsglob.h"
 #include "cifsproto.h"
 #include "smb2proto.h"
···
 #include "nterr.h"
 
 static int
-check_smb2_hdr(struct smb2_sync_hdr *shdr, __u64 mid)
+check_smb2_hdr(struct smb2_hdr *shdr, __u64 mid)
 {
 	__u64 wire_mid = le64_to_cpu(shdr->MessageId);
 
···
 	/* SMB2_OPLOCK_BREAK */ cpu_to_le16(24)
 };
 
-#define SMB311_NEGPROT_BASE_SIZE (sizeof(struct smb2_sync_hdr) + sizeof(struct smb2_negotiate_rsp))
+#define SMB311_NEGPROT_BASE_SIZE (sizeof(struct smb2_hdr) + sizeof(struct smb2_negotiate_rsp))
 
-static __u32 get_neg_ctxt_len(struct smb2_sync_hdr *hdr, __u32 len,
+static __u32 get_neg_ctxt_len(struct smb2_hdr *hdr, __u32 len,
 			      __u32 non_ctxlen)
 {
 	__u16 neg_count;
···
 int
 smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *srvr)
 {
-	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
-	struct smb2_sync_pdu *pdu = (struct smb2_sync_pdu *)shdr;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
+	struct smb2_pdu *pdu = (struct smb2_pdu *)shdr;
 	__u64 mid;
 	__u32 clc_len;  /* calculated length */
 	int command;
-	int pdu_size = sizeof(struct smb2_sync_pdu);
-	int hdr_size = sizeof(struct smb2_sync_hdr);
+	int pdu_size = sizeof(struct smb2_pdu);
+	int hdr_size = sizeof(struct smb2_hdr);
 
 	/*
 	 * Add function to do table lookup of StructureSize by command
···
 		/* decrypt frame now that it is completely read in */
 		spin_lock(&cifs_tcp_ses_lock);
 		list_for_each_entry(ses, &srvr->smb_ses_list, smb_ses_list) {
-			if (ses->Suid == thdr->SessionId)
+			if (ses->Suid == le64_to_cpu(thdr->SessionId))
 				break;
 		}
 		spin_unlock(&cifs_tcp_ses_lock);
···
  * area and the offset to it (from the beginning of the smb are also returned.
  */
 char *
-smb2_get_data_area_len(int *off, int *len, struct smb2_sync_hdr *shdr)
+smb2_get_data_area_len(int *off, int *len, struct smb2_hdr *shdr)
 {
 	*off = 0;
 	*len = 0;
···
 unsigned int
 smb2_calc_size(void *buf, struct TCP_Server_Info *srvr)
 {
-	struct smb2_sync_pdu *pdu = (struct smb2_sync_pdu *)buf;
-	struct smb2_sync_hdr *shdr = &pdu->sync_hdr;
+	struct smb2_pdu *pdu = (struct smb2_pdu *)buf;
+	struct smb2_hdr *shdr = &pdu->hdr;
 	int offset; /* the offset from the beginning of SMB to data area */
 	int data_length; /* the length of the variable length data area */
 	/* Structure Size has already been checked to make sure it is 64 */
···
 
 	cifs_dbg(FYI, "Checking for oplock break\n");
 
-	if (rsp->sync_hdr.Command != SMB2_OPLOCK_BREAK)
+	if (rsp->hdr.Command != SMB2_OPLOCK_BREAK)
 		return false;
 
 	if (rsp->StructureSize !=
···
 int
 smb2_handle_cancelled_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server)
 {
-	struct smb2_sync_hdr *sync_hdr = mid->resp_buf;
+	struct smb2_hdr *hdr = mid->resp_buf;
 	struct smb2_create_rsp *rsp = mid->resp_buf;
 	struct cifs_tcon *tcon;
 	int rc;
 
-	if ((mid->optype & CIFS_CP_CREATE_CLOSE_OP) || sync_hdr->Command != SMB2_CREATE ||
-	    sync_hdr->Status != STATUS_SUCCESS)
+	if ((mid->optype & CIFS_CP_CREATE_CLOSE_OP) || hdr->Command != SMB2_CREATE ||
+	    hdr->Status != STATUS_SUCCESS)
 		return 0;
 
-	tcon = smb2_find_smb_tcon(server, sync_hdr->SessionId,
-				  sync_hdr->TreeId);
+	tcon = smb2_find_smb_tcon(server, le64_to_cpu(hdr->SessionId),
+				  le32_to_cpu(hdr->Id.SyncId.TreeId));
 	if (!tcon)
 		return -ENOENT;
 
 	rc = __smb2_handle_cancelled_cmd(tcon,
-					 le16_to_cpu(sync_hdr->Command),
-					 le64_to_cpu(sync_hdr->MessageId),
-					 rsp->PersistentFileId,
-					 rsp->VolatileFileId);
+					 le16_to_cpu(hdr->Command),
+					 le64_to_cpu(hdr->MessageId),
+					 le64_to_cpu(rsp->PersistentFileId),
+					 le64_to_cpu(rsp->VolatileFileId));
 	if (rc)
 		cifs_put_tcon(tcon);
 
···
 {
 	int i, rc;
 	struct sdesc *d;
-	struct smb2_sync_hdr *hdr;
+	struct smb2_hdr *hdr;
 	struct TCP_Server_Info *server = cifs_ses_server(ses);
 
-	hdr = (struct smb2_sync_hdr *)iov[0].iov_base;
+	hdr = (struct smb2_hdr *)iov[0].iov_base;
 	/* neg prot are always taken */
 	if (hdr->Command == SMB2_NEGOTIATE)
 		goto ok;

fs/cifs/smb2ops.c

···
 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 {
 	struct mid_q_entry *mid;
-	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 	__u64 wire_mid = le64_to_cpu(shdr->MessageId);
 
 	if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
···
 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 {
 #ifdef CONFIG_CIFS_DEBUG2
-	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 
 	cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 		 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
-		 shdr->ProcessId);
+		 shdr->Id.SyncId.ProcessId);
 	cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 		 server->ops->calc_smb_size(buf, server));
 #endif
···
 	atomic_inc(&tcon->num_remote_opens);
 
 	o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
-	oparms.fid->persistent_fid = o_rsp->PersistentFileId;
-	oparms.fid->volatile_fid = o_rsp->VolatileFileId;
+	oparms.fid->persistent_fid = le64_to_cpu(o_rsp->PersistentFileId);
+	oparms.fid->volatile_fid = le64_to_cpu(o_rsp->VolatileFileId);
 #ifdef CONFIG_CIFS_DEBUG2
-	oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
+	oparms.fid->mid = le64_to_cpu(o_rsp->hdr.MessageId);
 #endif /* CIFS_DEBUG2 */
 
 	tcon->crfid.tcon = tcon;
···
 
 	/* If the open failed there is nothing to do */
 	op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
-	if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
+	if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
 		cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
 		goto qdf_free;
 	}
-	fid->persistent_fid = op_rsp->PersistentFileId;
-	fid->volatile_fid = op_rsp->VolatileFileId;
+	fid->persistent_fid = le64_to_cpu(op_rsp->PersistentFileId);
+	fid->volatile_fid = le64_to_cpu(op_rsp->VolatileFileId);
 
 	/* Anything else than ENODATA means a genuine error */
 	if (rc && rc != -ENODATA) {
···
 	atomic_inc(&tcon->num_remote_opens);
 
 	qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
-	if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
+	if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
 		trace_smb3_query_dir_done(xid, fid->persistent_fid,
 					  tcon->tid, tcon->ses->Suid, 0, 0);
 		srch_inf->endOfSearch = true;
···
 static bool
 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
 {
-	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 	int scredits, in_flight;
 
 	if (shdr->Status != STATUS_PENDING)
···
 static bool
 smb2_is_session_expired(char *buf)
 {
-	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 
 	if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
 	    shdr->Status != STATUS_USER_SESSION_DELETED)
 		return false;
 
-	trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
+	trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
+			       le64_to_cpu(shdr->SessionId),
 			       le16_to_cpu(shdr->Command),
 			       le64_to_cpu(shdr->MessageId));
 	cifs_dbg(FYI, "Session expired or deleted\n");
···
 static bool
 smb2_is_status_io_timeout(char *buf)
 {
-	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 
 	if (shdr->Status == STATUS_IO_TIMEOUT)
 		return true;
···
 static void
 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
 {
-	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 	struct list_head *tmp, *tmp1;
 	struct cifs_ses *ses;
 	struct cifs_tcon *tcon;
···
 		ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
 		list_for_each(tmp1, &ses->tcon_list) {
 			tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
-			if (tcon->tid == shdr->TreeId) {
+			if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
 				tcon->need_reconnect = true;
 				spin_unlock(&cifs_tcp_ses_lock);
 				pr_warn_once("Server share %s deleted.\n",
···
 void
 smb2_set_related(struct smb_rqst *rqst)
 {
-	struct smb2_sync_hdr *shdr;
+	struct smb2_hdr *shdr;
 
-	shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
+	shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
 	if (shdr == NULL) {
 		cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
 		return;
···
 void
 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
 {
-	struct smb2_sync_hdr *shdr;
+	struct smb2_hdr *shdr;
 	struct cifs_ses *ses = tcon->ses;
 	struct TCP_Server_Info *server = ses->server;
 	unsigned long len = smb_rqst_len(server, rqst);
 	int i, num_padding;
 
-	shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
+	shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
 	if (shdr == NULL) {
 		cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
 		return;
···
 				resp_buftype, rsp_iov);
 
 	create_rsp = rsp_iov[0].iov_base;
-	if (create_rsp && create_rsp->sync_hdr.Status)
+	if (create_rsp && create_rsp->hdr.Status)
 		err_iov = rsp_iov[0];
 	ioctl_rsp = rsp_iov[1].iov_base;
 
···
 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
 		   struct smb_rqst *old_rq, __le16 cipher_type)
 {
-	struct smb2_sync_hdr *shdr =
-			(struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
+	struct smb2_hdr *shdr =
+			(struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
 
 	memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
 	tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
···
 	struct crypto_aead *tfm;
 	unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
 
-	rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
+	rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
 	if (rc) {
 		cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
 			 enc ? "en" : "de");
···
 	unsigned int cur_page_idx;
 	unsigned int pad_len;
 	struct cifs_readdata *rdata = mid->callback_data;
-	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 	struct bio_vec *bvec = NULL;
 	struct iov_iter iter;
 	struct kvec iov;
···
 {
 	int ret, length;
 	char *buf = server->smallbuf;
-	struct smb2_sync_hdr *shdr;
+	struct smb2_hdr *shdr;
 	unsigned int pdu_length = server->pdu_size;
 	unsigned int buf_size;
 	struct mid_q_entry *mid_entry;
···
 
 	next_is_large = server->large_buf;
 one_more:
-	shdr = (struct smb2_sync_hdr *)buf;
+	shdr = (struct smb2_hdr *)buf;
 	if (shdr->NextCommand) {
 		if (next_is_large)
 			next_buffer = (char *)cifs_buf_get();
···
 	unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
 
 	if (pdu_length < sizeof(struct smb2_transform_hdr) +
-						sizeof(struct smb2_sync_hdr)) {
+						sizeof(struct smb2_hdr)) {
 		cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
 			 pdu_length);
 		cifs_reconnect(server);
···
 static int
 smb2_next_header(char *buf)
 {
-	struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
+	struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 	struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
 
 	if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
···
 	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 	.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
-	.header_size = sizeof(struct smb2_sync_hdr),
+	.header_size = sizeof(struct smb2_hdr),
 	.header_preamble_size = 0,
 	.max_header_size = MAX_SMB2_HDR_SIZE,
 	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
···
 	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 	.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
-	.header_size = sizeof(struct smb2_sync_hdr),
+	.header_size = sizeof(struct smb2_hdr),
 	.header_preamble_size = 0,
 	.max_header_size = MAX_SMB2_HDR_SIZE,
 	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
···
 	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 	.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
-	.header_size = sizeof(struct smb2_sync_hdr),
+	.header_size = sizeof(struct smb2_hdr),
 	.header_preamble_size = 0,
 	.max_header_size = MAX_SMB2_HDR_SIZE,
 	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
···
 	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 	.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
-	.header_size = sizeof(struct smb2_sync_hdr),
+	.header_size = sizeof(struct smb2_hdr),
 	.header_preamble_size = 0,
 	.max_header_size = MAX_SMB2_HDR_SIZE,
 	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
···
 	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 	.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
-	.header_size = sizeof(struct smb2_sync_hdr),
+	.header_size = sizeof(struct smb2_hdr),
 	.header_preamble_size = 0,
 	.max_header_size = MAX_SMB2_HDR_SIZE,
 	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
···
 	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 	.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
-	.header_size = sizeof(struct smb2_sync_hdr),
+	.header_size = sizeof(struct smb2_hdr),
 	.header_preamble_size = 0,
 	.max_header_size = MAX_SMB2_HDR_SIZE,
 	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
···
 	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 	.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
-	.header_size = sizeof(struct smb2_sync_hdr),
+	.header_size = sizeof(struct smb2_hdr),
 	.header_preamble_size = 0,
 	.max_header_size = MAX_SMB2_HDR_SIZE,
 	.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,

fs/cifs/smb2pdu.c

···
 #include <linux/uuid.h>
 #include <linux/pagemap.h>
 #include <linux/xattr.h>
-#include "smb2pdu.h"
 #include "cifsglob.h"
 #include "cifsacl.h"
 #include "cifsproto.h"
···
 }
 
 static void
-smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
+smb2_hdr_assemble(struct smb2_hdr *shdr, __le16 smb2_cmd,
 		  const struct cifs_tcon *tcon,
 		  struct TCP_Server_Info *server)
 {
···
 	} else {
 		shdr->CreditRequest = cpu_to_le16(2);
 	}
-	shdr->ProcessId = cpu_to_le32((__u16)current->tgid);
+	shdr->Id.SyncId.ProcessId = cpu_to_le32((__u16)current->tgid);
 
 	if (!tcon)
 		goto out;
···
 		shdr->CreditCharge = cpu_to_le16(1);
 	/* else CreditCharge MBZ */
 
-	shdr->TreeId = tcon->tid;
+	shdr->Id.SyncId.TreeId = cpu_to_le32(tcon->tid);
 	/* Uid is not converted */
 	if (tcon->ses)
-		shdr->SessionId = tcon->ses->Suid;
+		shdr->SessionId = cpu_to_le64(tcon->ses->Suid);
 
 	/*
 	 * If we would set SMB2_FLAGS_DFS_OPERATIONS on open we also would have
···
 	       void *buf,
 	       unsigned int *total_len)
 {
-	struct smb2_sync_pdu *spdu = (struct smb2_sync_pdu *)buf;
+	struct smb2_pdu *spdu = (struct smb2_pdu *)buf;
 	/* lookup word count ie StructureSize from table */
 	__u16 parmsize = smb2_req_struct_sizes[le16_to_cpu(smb2_command)];
 
···
 	 */
 	memset(buf, 0, 256);
 
-	smb2_hdr_assemble(&spdu->sync_hdr, smb2_command, tcon, server);
+	smb2_hdr_assemble(&spdu->hdr, smb2_command, tcon, server);
 	spdu->StructureSize2 = cpu_to_le16(parmsize);
 
-	*total_len = parmsize + sizeof(struct smb2_sync_hdr);
+	*total_len = parmsize + sizeof(struct smb2_hdr);
 }
 
 /*
···
 	}
 
 	fill_small_buf(smb2_command, tcon, server,
-		       (struct smb2_sync_hdr *)(*request_buf),
+		       (struct smb2_hdr *)(*request_buf),
 		       total_len);
 
 	if (tcon != NULL) {
···
 	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_LINUX_CLIENT_SALT_SIZE);
-	get_random_bytes(pneg_ctxt->Salt, SMB311_LINUX_CLIENT_SALT_SIZE);
+	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;
 }
 
···
 	if (rc)
 		return rc;
 
-	req->sync_hdr.SessionId = 0;
+	req->hdr.SessionId = 0;
 
 	memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
 	memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
···
 		server->cipher_type = SMB2_ENCRYPTION_AES128_CCM;
 
 	security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
-					       (struct smb2_sync_hdr *)rsp);
+					       (struct smb2_hdr *)rsp);
 	/*
 	 * See MS-SMB2 section 2.2.4: if no blob, client picks default which
 	 * for us will be
···
 		return rc;
 
 	if (sess_data->ses->binding) {
-		req->sync_hdr.SessionId = sess_data->ses->Suid;
-		req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
+		req->hdr.SessionId = cpu_to_le64(sess_data->ses->Suid);
+		req->hdr.Flags |= SMB2_FLAGS_SIGNED;
 		req->PreviousSessionId = 0;
 		req->Flags = SMB2_SESSION_REQ_FLAG_BINDING;
 	} else {
 		/* First session, not a reauthenticate */
-		req->sync_hdr.SessionId = 0;
+		req->hdr.SessionId = 0;
 		/*
 		 * if reconnect, we need to send previous sess id
 		 * otherwise it is 0
 		 */
-		req->PreviousSessionId = sess_data->previous_session;
+		req->PreviousSessionId = cpu_to_le64(sess_data->previous_session);
 		req->Flags = 0; /* MBZ */
 	}
 
 	/* enough to enable echos and oplocks and one max size write */
-	req->sync_hdr.CreditRequest = cpu_to_le16(130);
+	req->hdr.CreditRequest = cpu_to_le16(130);
 
 	/* only one of SMB2 signing flags may be set in SMB2 request */
 	if (server->sign)
···
 	rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
 	/* keep session id and flags if binding */
 	if (!ses->binding) {
-		ses->Suid = rsp->sync_hdr.SessionId;
+		ses->Suid = le64_to_cpu(rsp->hdr.SessionId);
 		ses->session_flags = le16_to_cpu(rsp->SessionFlags);
 	}
 
···
 
 	/* If true, rc here is expected and not an error */
 	if (sess_data->buf0_type != CIFS_NO_BUFFER &&
-		rsp->sync_hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
+		rsp->hdr.Status == STATUS_MORE_PROCESSING_REQUIRED)
 		rc = 0;
 
 	if (rc)
···
 
 	/* keep existing ses id and flags if binding */
 	if (!ses->binding) {
-		ses->Suid = rsp->sync_hdr.SessionId;
+		ses->Suid = le64_to_cpu(rsp->hdr.SessionId);
 		ses->session_flags = le16_to_cpu(rsp->SessionFlags);
 	}
 
···
 		goto out;
 
 	req = (struct smb2_sess_setup_req *) sess_data->iov[0].iov_base;
-	req->sync_hdr.SessionId = ses->Suid;
+	req->hdr.SessionId = cpu_to_le64(ses->Suid);
 
 	rc = build_ntlmssp_auth_blob(&ntlmssp_blob, &blob_length, ses,
 					sess_data->nls_cp);
···
 
 	/* keep existing ses id and flags if binding */
 	if (!ses->binding) {
-		ses->Suid = rsp->sync_hdr.SessionId;
+		ses->Suid = le64_to_cpu(rsp->hdr.SessionId);
 		ses->session_flags = le16_to_cpu(rsp->SessionFlags);
 	}
 
···
 		return rc;
 
 	 /* since no tcon, smb2_init can not do this, so do here */
-	req->sync_hdr.SessionId = ses->Suid;
+	req->hdr.SessionId = cpu_to_le64(ses->Suid);
 
 	if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
 		flags |= CIFS_TRANSFORM_REQ;
 	else if (server->sign)
-		req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
+		req->hdr.Flags |= SMB2_FLAGS_SIGNED;
 
 	flags |= CIFS_NO_RSP_BUF;
 
···
 	    !(ses->session_flags &
 		    (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) &&
 	    ((ses->user_name != NULL) || (ses->sectype == Kerberos)))
-		req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
+		req->hdr.Flags |= SMB2_FLAGS_SIGNED;
 
 	memset(&rqst, 0, sizeof(struct smb_rqst));
 	rqst.rq_iov = iov;
 	rqst.rq_nvec = 2;
 
 	/* Need 64 for max size write so ask for more in case not there yet */
-	req->sync_hdr.CreditRequest = cpu_to_le16(64);
+	req->hdr.CreditRequest = cpu_to_le16(64);
 
 	rc = cifs_send_recv(xid, ses, server,
 			    &rqst, &resp_buftype, flags, &rsp_iov);
···
 	tcon->maximal_access = le32_to_cpu(rsp->MaximalAccess);
 	tcon->tidStatus = CifsGood;
 	tcon->need_reconnect = false;
-	tcon->tid = rsp->sync_hdr.TreeId;
+	tcon->tid = le32_to_cpu(rsp->hdr.Id.SyncId.TreeId);
 	strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
 
 	if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
···
 	return rc;
 
 tcon_error_exit:
-	if (rsp && rsp->sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
+	if (rsp && rsp->hdr.Status == STATUS_BAD_NETWORK_NAME)
 		cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
-	}
 	goto tcon_exit;
 }
 
···
 	if (tcon->share_flags & SHI1005_FLAGS_DFS) {
 		int name_len;
 
-		req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
+		req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
 		rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
 						 &name_len,
 						 tcon->treeName, utf16_path);
···
 	}
 
 	rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
-	trace_smb3_posix_mkdir_done(xid, rsp->PersistentFileId, tcon->tid,
+	trace_smb3_posix_mkdir_done(xid, le64_to_cpu(rsp->PersistentFileId),
+				    tcon->tid,
 				    ses->Suid, CREATE_NOT_FILE,
 				    FILE_WRITE_ATTRIBUTES);
 
-	SMB2_close(xid, tcon, rsp->PersistentFileId, rsp->VolatileFileId);
+	SMB2_close(xid, tcon, le64_to_cpu(rsp->PersistentFileId),
+		   le64_to_cpu(rsp->VolatileFileId));
 
 	/* Eventually save off posix specific response info and timestaps */
 
···
 	if (tcon->share_flags & SHI1005_FLAGS_DFS) {
 		int name_len;
 
-		req->sync_hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
+		req->hdr.Flags |= SMB2_FLAGS_DFS_OPERATIONS;
 		rc = alloc_path_with_tree_prefix(&copy_path, &copy_size,
 						 &name_len,
 						 tcon->treeName, path);
···
 		}
 		goto creat_exit;
 	} else
-		trace_smb3_open_done(xid, rsp->PersistentFileId, tcon->tid,
+		trace_smb3_open_done(xid, le64_to_cpu(rsp->PersistentFileId),
+				     tcon->tid,
 				     ses->Suid, oparms->create_options,
 				     oparms->desired_access);
 
 	atomic_inc(&tcon->num_remote_opens);
-	oparms->fid->persistent_fid = rsp->PersistentFileId;
-	oparms->fid->volatile_fid = rsp->VolatileFileId;
+	oparms->fid->persistent_fid = le64_to_cpu(rsp->PersistentFileId);
+	oparms->fid->volatile_fid = le64_to_cpu(rsp->VolatileFileId);
 	oparms->fid->access = oparms->desired_access;
 #ifdef CONFIG_CIFS_DEBUG2
-	oparms->fid->mid = le64_to_cpu(rsp->sync_hdr.MessageId);
+	oparms->fid->mid = le64_to_cpu(rsp->hdr.MessageId);
 #endif /* CIFS_DEBUG2 */
 
 	if (buf) {
···
 	 * response size smaller.
 	 */
 	req->MaxOutputResponse = cpu_to_le32(max_response_size);
-	req->sync_hdr.CreditCharge =
+	req->hdr.CreditCharge =
 		cpu_to_le16(DIV_ROUND_UP(max(indatalen, max_response_size),
 					 SMB2_MAX_BUFFER_SIZE));
 	if (is_fsctl)
···
 
 	/* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
 	if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
-		req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
+		req->hdr.Flags |= SMB2_FLAGS_SIGNED;
 
 	return 0;
 }
···
 	if (rc)
 		return rc;
 
-	req->PersistentFileId = persistent_fid;
-	req->VolatileFileId = volatile_fid;
+	req->PersistentFileId = cpu_to_le64(persistent_fid);
+	req->VolatileFileId = cpu_to_le64(volatile_fid);
 	if (query_attrs)
 		req->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
 	else
···
 	if (rc)
 		return rc;
 
-	req->PersistentFileId = persistent_fid;
-	req->VolatileFileId = volatile_fid;
+	req->PersistentFileId = cpu_to_le64(persistent_fid);
+	req->VolatileFileId = cpu_to_le64(volatile_fid);
 	/* See note 354 of MS-SMB2, 64K max */
 	req->OutputBufferLength =
 		cpu_to_le32(SMB2_MAX_BUFFER_SIZE - MAX_SMB2_HDR_SIZE);
···
 
 	if (mid->mid_state == MID_RESPONSE_RECEIVED
 	    || mid->mid_state == MID_RESPONSE_MALFORMED) {
-		credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
+		credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
 		credits.instance = server->reconnect_instance;
 	}
 
···
 	if (rc)
 		return rc;
 
-	req->sync_hdr.CreditRequest = cpu_to_le16(1);
+	req->hdr.CreditRequest = cpu_to_le16(1);
 
 	iov[0].iov_len = total_len;
 	iov[0].iov_base = (char *)req;
···
 	if (rc)
 		return rc;
 
-	req->PersistentFileId = persistent_fid;
-	req->VolatileFileId = volatile_fid;
+	req->PersistentFileId = cpu_to_le64(persistent_fid);
+	req->VolatileFileId = cpu_to_le64(volatile_fid);
 
 	iov[0].iov_base = (char *)req;
 	iov[0].iov_len = total_len;
···
 	unsigned int remaining_bytes, int request_type)
 {
 	int rc = -EACCES;
-	struct smb2_read_plain_req *req = NULL;
-	struct smb2_sync_hdr *shdr;
+	struct smb2_read_req *req = NULL;
+	struct smb2_hdr *shdr;
 	struct TCP_Server_Info *server = io_parms->server;
 
 	rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, server,
···
 	if (server == NULL)
 		return -ECONNABORTED;
 
-	shdr = &req->sync_hdr;
-	shdr->ProcessId = cpu_to_le32(io_parms->pid);
+	shdr = &req->hdr;
+	shdr->Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid);
 
-	req->PersistentFileId = io_parms->persistent_fid;
-	req->VolatileFileId = io_parms->volatile_fid;
+	req->PersistentFileId = cpu_to_le64(io_parms->persistent_fid);
+	req->VolatileFileId = cpu_to_le64(io_parms->volatile_fid);
 	req->ReadChannelInfoOffset = 0; /* reserved */
 	req->ReadChannelInfoLength = 0; /* reserved */
 	req->Channel = 0; /* reserved */
···
 		if (need_invalidate)
 			req->Channel = SMB2_CHANNEL_RDMA_V1;
 		req->ReadChannelInfoOffset =
-			cpu_to_le16(offsetof(struct smb2_read_plain_req, Buffer));
+			cpu_to_le16(offsetof(struct smb2_read_req, Buffer));
 		req->ReadChannelInfoLength =
 			cpu_to_le16(sizeof(struct smbd_buffer_descriptor_v1));
 		v1 = (struct smbd_buffer_descriptor_v1 *) &req->Buffer[0];
···
 			 * Related requests use info from previous read request
 			 * in chain.
 			 */
-			shdr->SessionId = 0xFFFFFFFFFFFFFFFF;
-			shdr->TreeId = 0xFFFFFFFF;
-			req->PersistentFileId = 0xFFFFFFFFFFFFFFFF;
-			req->VolatileFileId = 0xFFFFFFFFFFFFFFFF;
+			shdr->SessionId = cpu_to_le64(0xFFFFFFFFFFFFFFFF);
+			shdr->Id.SyncId.TreeId = cpu_to_le32(0xFFFFFFFF);
+			req->PersistentFileId = cpu_to_le64(0xFFFFFFFFFFFFFFFF);
+			req->VolatileFileId = cpu_to_le64(0xFFFFFFFFFFFFFFFF);
 		}
 	}
 	if (remaining_bytes > io_parms->length)
···
 	struct cifs_readdata *rdata = mid->callback_data;
 	struct cifs_tcon *tcon = tlink_tcon(rdata->cfile->tlink);
 	struct TCP_Server_Info *server = rdata->server;
-	struct smb2_sync_hdr *shdr =
-				(struct smb2_sync_hdr *)rdata->iov[0].iov_base;
+	struct smb2_hdr *shdr =
+				(struct smb2_hdr *)rdata->iov[0].iov_base;
 	struct cifs_credits credits = { .value = 0, .instance = 0 };
 	struct smb_rqst rqst = { .rq_iov = &rdata->iov[1],
 				 .rq_nvec = 1,
···
 {
 	int rc, flags = 0;
 	char *buf;
-	struct smb2_sync_hdr *shdr;
+	struct smb2_hdr *shdr;
 	struct cifs_io_parms io_parms;
 	struct smb_rqst rqst = { .rq_iov = rdata->iov,
 				 .rq_nvec = 1 };
···
 	rdata->iov[0].iov_base = buf;
 	rdata->iov[0].iov_len = total_len;
 
-	shdr = (struct smb2_sync_hdr *)buf;
+	shdr = (struct smb2_hdr *)buf;
 
 	if (rdata->credits.value > 0) {
 		shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
···
 {
 	struct smb_rqst rqst;
 	int resp_buftype, rc;
-	struct smb2_read_plain_req *req = NULL;
+	struct smb2_read_req *req = NULL;
 	struct smb2_read_rsp *rsp = NULL;
 	struct kvec iov[1];
 	struct kvec rsp_iov;
···
 		if (rc != -ENODATA) {
 			cifs_stats_fail_inc(io_parms->tcon, SMB2_READ_HE);
 			cifs_dbg(VFS, "Send error in read = %d\n", rc);
-			trace_smb3_read_err(xid, req->PersistentFileId,
+			trace_smb3_read_err(xid,
+					    le64_to_cpu(req->PersistentFileId),
 					    io_parms->tcon->tid, ses->Suid,
 					    io_parms->offset, io_parms->length,
 					    rc);
 		} else
-			trace_smb3_read_done(xid, req->PersistentFileId,
-				    io_parms->tcon->tid, ses->Suid,
-				    io_parms->offset, 0);
+			trace_smb3_read_done(xid,
+					     le64_to_cpu(req->PersistentFileId),
+					     io_parms->tcon->tid, ses->Suid,
+					     io_parms->offset, 0);
 		free_rsp_buf(resp_buftype, rsp_iov.iov_base);
 		cifs_small_buf_release(req);
 		return rc == -ENODATA ? 0 : rc;
 	} else
-		trace_smb3_read_done(xid, req->PersistentFileId,
+		trace_smb3_read_done(xid,
+				     le64_to_cpu(req->PersistentFileId),
 				    io_parms->tcon->tid, ses->Suid,
 				    io_parms->offset, io_parms->length);
 
···
 
 	switch (mid->mid_state) {
 	case MID_RESPONSE_RECEIVED:
-		credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
+		credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
 		credits.instance = server->reconnect_instance;
 		wdata->result = smb2_check_receive(mid, server, 0);
 		if (wdata->result != 0)
···
 		wdata->result = -EAGAIN;
 		break;
 	case MID_RESPONSE_MALFORMED:
-		credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
+		credits.value = le16_to_cpu(rsp->hdr.CreditRequest);
 		credits.instance = server->reconnect_instance;
 		fallthrough;
 	default:
···
 {
 	int rc = -EACCES, flags = 0;
 	struct smb2_write_req *req = NULL;
-	struct smb2_sync_hdr *shdr;
+	struct smb2_hdr *shdr;
 	struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
 	struct TCP_Server_Info *server = wdata->server;
 	struct kvec iov[1];
···
 	if (smb3_encryption_required(tcon))
 		flags |= CIFS_TRANSFORM_REQ;
 
-	shdr = (struct smb2_sync_hdr *)req;
-	shdr->ProcessId = cpu_to_le32(wdata->cfile->pid);
+	shdr = (struct smb2_hdr *)req;
+	shdr->Id.SyncId.ProcessId = cpu_to_le32(wdata->cfile->pid);
 
-	req->PersistentFileId = wdata->cfile->fid.persistent_fid;
-	req->VolatileFileId = wdata->cfile->fid.volatile_fid;
+	req->PersistentFileId = cpu_to_le64(wdata->cfile->fid.persistent_fid);
+	req->VolatileFileId = cpu_to_le64(wdata->cfile->fid.volatile_fid);
 	req->WriteChannelInfoOffset = 0;
 	req->WriteChannelInfoLength = 0;
 	req->Channel = 0;
···
 			     wdata, flags, &wdata->credits);
 
 	if (rc) {
-		trace_smb3_write_err(0 /* no xid */, req->PersistentFileId,
+		trace_smb3_write_err(0 /* no xid */,
+				     le64_to_cpu(req->PersistentFileId),
 				     tcon->tid, tcon->ses->Suid, wdata->offset,
 				     wdata->bytes, rc);
 		kref_put(&wdata->refcount, release);
···
 	if (smb3_encryption_required(io_parms->tcon))
 		flags |= CIFS_TRANSFORM_REQ;
 
-	req->sync_hdr.ProcessId = cpu_to_le32(io_parms->pid);
+	req->hdr.Id.SyncId.ProcessId = cpu_to_le32(io_parms->pid);
 
-	req->PersistentFileId = io_parms->persistent_fid;
-	req->VolatileFileId = io_parms->volatile_fid;
+	req->PersistentFileId = cpu_to_le64(io_parms->persistent_fid);
+	req->VolatileFileId = cpu_to_le64(io_parms->volatile_fid);
 	req->WriteChannelInfoOffset = 0;
 	req->WriteChannelInfoLength = 0;
 	req->Channel = 0;
···
 	rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
 
 	if (rc) {
-		trace_smb3_write_err(xid, req->PersistentFileId,
+		trace_smb3_write_err(xid,
+				     le64_to_cpu(req->PersistentFileId),
 				     io_parms->tcon->tid,
 				     io_parms->tcon->ses->Suid,
 				     io_parms->offset, io_parms->length, rc);
···
 		cifs_dbg(VFS, "Send error in write = %d\n", rc);
 	} else {
 		*nbytes = le32_to_cpu(rsp->DataLength);
-		trace_smb3_write_done(xid, req->PersistentFileId,
-				     io_parms->tcon->tid,
-				     io_parms->tcon->ses->Suid,
-				     io_parms->offset, *nbytes);
+		trace_smb3_write_done(xid,
+				      le64_to_cpu(req->PersistentFileId),
+				      io_parms->tcon->tid,
+				      io_parms->tcon->ses->Suid,
+				      io_parms->offset, *nbytes);
 	}
 
 	cifs_small_buf_release(req);
···
 
 	if (rc) {
 		if (rc == -ENODATA &&
-		    rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
+		    rsp->hdr.Status == STATUS_NO_MORE_FILES) {
 			trace_smb3_query_dir_done(xid, persistent_fid,
 				tcon->tid, tcon->ses->Suid, index, 0);
 			srch_inf->endOfSearch = true;
···
 	if (rc)
 		return rc;
 
-	req->sync_hdr.ProcessId = cpu_to_le32(pid);
+	req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid);
 	req->InfoType = info_type;
 	req->FileInfoClass = info_class;
 	req->PersistentFileId = persistent_fid;
···
 	req->VolatileFid = volatile_fid;
 	req->PersistentFid = persistent_fid;
 	req->OplockLevel = oplock_level;
-	req->sync_hdr.CreditRequest = cpu_to_le16(1);
+	req->hdr.CreditRequest = cpu_to_le16(1);
 
 	flags |= CIFS_NO_RSP_BUF;
 
···
 	if (smb3_encryption_required(tcon))
 		flags |= CIFS_TRANSFORM_REQ;
 
-	req->sync_hdr.ProcessId = cpu_to_le32(pid);
+	req->hdr.Id.SyncId.ProcessId = cpu_to_le32(pid);
 	req->LockCount = cpu_to_le16(num_lock);
 
 	req->PersistentFileId = persist_fid;
···
 	if (smb3_encryption_required(tcon))
 		flags |= CIFS_TRANSFORM_REQ;
 
-	req->sync_hdr.CreditRequest = cpu_to_le16(1);
+	req->hdr.CreditRequest = cpu_to_le16(1);
 	req->StructureSize = cpu_to_le16(36);
 	total_len += 12;
 

fs/cifs/smb2pdu.h

···
 #include <net/sock.h>
 #include "cifsacl.h"
 
-/*
- * Note that, due to trying to use names similar to the protocol specifications,
- * there are many mixed case field names in the structures below.  Although
- * this does not match typical Linux kernel style, it is necessary to be
- * able to match against the protocol specfication.
- *
- * SMB2 commands
- * Some commands have minimal (wct=0,bcc=0), or uninteresting, responses
- * (ie no useful data other than the SMB error code itself) and are marked such.
- * Knowing this helps avoid response buffer allocations and copy in some cases.
- */
-
-/* List of commands in host endian */
-#define SMB2_NEGOTIATE_HE	0x0000
-#define SMB2_SESSION_SETUP_HE	0x0001
-#define SMB2_LOGOFF_HE		0x0002 /* trivial request/resp */
-#define SMB2_TREE_CONNECT_HE	0x0003
-#define SMB2_TREE_DISCONNECT_HE	0x0004 /* trivial req/resp */
-#define SMB2_CREATE_HE		0x0005
-#define SMB2_CLOSE_HE		0x0006
-#define SMB2_FLUSH_HE		0x0007 /* trivial resp */
-#define SMB2_READ_HE		0x0008
-#define SMB2_WRITE_HE		0x0009
-#define SMB2_LOCK_HE		0x000A
-#define SMB2_IOCTL_HE		0x000B
-#define SMB2_CANCEL_HE		0x000C
-#define SMB2_ECHO_HE		0x000D
-#define SMB2_QUERY_DIRECTORY_HE	0x000E
-#define SMB2_CHANGE_NOTIFY_HE	0x000F
-#define SMB2_QUERY_INFO_HE	0x0010
-#define SMB2_SET_INFO_HE	0x0011
-#define SMB2_OPLOCK_BREAK_HE	0x0012
-
-/* The same list in little endian */
-#define SMB2_NEGOTIATE		cpu_to_le16(SMB2_NEGOTIATE_HE)
-#define SMB2_SESSION_SETUP	cpu_to_le16(SMB2_SESSION_SETUP_HE)
-#define SMB2_LOGOFF		cpu_to_le16(SMB2_LOGOFF_HE)
-#define SMB2_TREE_CONNECT	cpu_to_le16(SMB2_TREE_CONNECT_HE)
-#define SMB2_TREE_DISCONNECT	cpu_to_le16(SMB2_TREE_DISCONNECT_HE)
-#define SMB2_CREATE		cpu_to_le16(SMB2_CREATE_HE)
-#define SMB2_CLOSE		cpu_to_le16(SMB2_CLOSE_HE)
-#define SMB2_FLUSH		cpu_to_le16(SMB2_FLUSH_HE)
-#define SMB2_READ		cpu_to_le16(SMB2_READ_HE)
-#define SMB2_WRITE		cpu_to_le16(SMB2_WRITE_HE)
-#define SMB2_LOCK		cpu_to_le16(SMB2_LOCK_HE)
-#define SMB2_IOCTL		cpu_to_le16(SMB2_IOCTL_HE)
-#define SMB2_CANCEL		cpu_to_le16(SMB2_CANCEL_HE)
-#define SMB2_ECHO		cpu_to_le16(SMB2_ECHO_HE)
-#define SMB2_QUERY_DIRECTORY	cpu_to_le16(SMB2_QUERY_DIRECTORY_HE)
-#define SMB2_CHANGE_NOTIFY	cpu_to_le16(SMB2_CHANGE_NOTIFY_HE)
-#define SMB2_QUERY_INFO		cpu_to_le16(SMB2_QUERY_INFO_HE)
-#define SMB2_SET_INFO		cpu_to_le16(SMB2_SET_INFO_HE)
-#define SMB2_OPLOCK_BREAK	cpu_to_le16(SMB2_OPLOCK_BREAK_HE)
-
-#define SMB2_INTERNAL_CMD	cpu_to_le16(0xFFFF)
-
-#define NUMBER_OF_SMB2_COMMANDS	0x0013
-
 /* 52 transform hdr + 64 hdr + 88 create rsp */
 #define SMB2_TRANSFORM_HEADER_SIZE 52
 #define MAX_SMB2_HDR_SIZE 204
 
-#define SMB2_PROTO_NUMBER cpu_to_le32(0x424d53fe)
-#define SMB2_TRANSFORM_PROTO_NUM cpu_to_le32(0x424d53fd)
-#define SMB2_COMPRESSION_TRANSFORM_ID cpu_to_le32(0x424d53fc)
-
-/*
- * SMB2 Header Definition
- *
- * "MBZ" :  Must be Zero
- * "BB"  :  BugBug, Something to check/review/analyze later
- * "PDU" :  "Protocol Data Unit" (ie a network "frame")
- *
- */
-
-#define SMB2_HEADER_STRUCTURE_SIZE cpu_to_le16(64)
-
-struct smb2_sync_hdr {
-	__le32 ProtocolId;	/* 0xFE 'S' 'M' 'B' */
-	__le16 StructureSize;	/* 64 */
-	__le16 CreditCharge;	/* MBZ */
-	__le32 Status;		/* Error from server */
-	__le16 Command;
-	__le16 CreditRequest;  /* CreditResponse */
-	__le32 Flags;
-	__le32 NextCommand;
-	__le64 MessageId;
-	__le32 ProcessId;
-	__u32  TreeId;		/* opaque - so do not make little endian */
-	__u64  SessionId;	/* opaque - so do not make little endian */
-	__u8   Signature[16];
-} __packed;
-
 /* The total header size for SMB2 read and write */
-#define SMB2_READWRITE_PDU_HEADER_SIZE (48 + sizeof(struct smb2_sync_hdr))
-
-struct smb2_sync_pdu {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize2; /* size of wct area (varies, request specific) */
-} __packed;
-
-#define SMB3_AES_CCM_NONCE 11
-#define SMB3_AES_GCM_NONCE 12
-
-/* Transform flags (for 3.0 dialect this flag indicates CCM */
-#define TRANSFORM_FLAG_ENCRYPTED	0x0001
-struct smb2_transform_hdr {
-	__le32 ProtocolId;	/* 0xFD 'S' 'M' 'B' */
-	__u8   Signature[16];
-	__u8   Nonce[16];
-	__le32 OriginalMessageSize;
-	__u16  Reserved1;
-	__le16 Flags; /* EncryptionAlgorithm for 3.0, enc enabled for 3.1.1 */
-	__u64  SessionId;
-} __packed;
-
-/* See MS-SMB2 2.2.42 */
-struct smb2_compression_transform_hdr_unchained {
-	__le32 ProtocolId;	/* 0xFC 'S' 'M' 'B' */
-	__le32 OriginalCompressedSegmentSize;
-	__le16 CompressionAlgorithm;
-	__le16 Flags;
-	__le16 Length; /* if chained it is length, else offset */
-} __packed;
-
-/* See MS-SMB2 2.2.42.1 */
-#define SMB2_COMPRESSION_FLAG_NONE	0x0000
-#define SMB2_COMPRESSION_FLAG_CHAINED	0x0001
-
-struct compression_payload_header {
-	__le16	CompressionAlgorithm;
-	__le16	Flags;
-	__le32	Length; /* length of compressed playload including field below if present */
-	/* __le32 OriginalPayloadSize; */ /* optional, present when LZNT1, LZ77, LZ77+Huffman */
-} __packed;
-
-/* See MS-SMB2 2.2.42.2 */
-struct smb2_compression_transform_hdr_chained {
-	__le32 ProtocolId;	/* 0xFC 'S' 'M' 'B' */
-	__le32 OriginalCompressedSegmentSize;
-	/* struct compression_payload_header[] */
-} __packed;
-
-/* See MS-SMB2 2.2.42.2.2 */
-struct compression_pattern_payload_v1 {
-	__le16	Pattern;
-	__le16	Reserved1;
-	__le16	Reserved2;
-	__le32	Repetitions;
-} __packed;
+#define SMB2_READWRITE_PDU_HEADER_SIZE (48 + sizeof(struct smb2_hdr))
 
 /* See MS-SMB2 2.2.43 */
 struct smb2_rdma_transform {
···
 } __packed;
 
 /*
- *	SMB2 flag definitions
- */
-#define SMB2_FLAGS_SERVER_TO_REDIR	cpu_to_le32(0x00000001)
-#define SMB2_FLAGS_ASYNC_COMMAND	cpu_to_le32(0x00000002)
-#define SMB2_FLAGS_RELATED_OPERATIONS	cpu_to_le32(0x00000004)
-#define SMB2_FLAGS_SIGNED		cpu_to_le32(0x00000008)
-#define SMB2_FLAGS_PRIORITY_MASK	cpu_to_le32(0x00000070) /* SMB3.1.1 */
-#define SMB2_FLAGS_DFS_OPERATIONS	cpu_to_le32(0x10000000)
-#define SMB2_FLAGS_REPLAY_OPERATION	cpu_to_le32(0x20000000) /* SMB3 & up */
-
-/*
  *	Definitions for SMB2 Protocol Data Units (network frames)
  *
  *  See MS-SMB2.PDF specification for protocol details.
···
 #define SMB2_ERROR_STRUCTURE_SIZE2 cpu_to_le16(9)
 
 struct smb2_err_rsp {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize;
 	__le16 Reserved; /* MBZ */
 	__le32 ByteCount;  /* even if zero, at least one byte follows */
···
 	/* __u8 ResourceName[] */ /* Name of share as counted Unicode string */
 } __packed;
 
-#define SMB2_CLIENT_GUID_SIZE 16
-
-struct smb2_negotiate_req {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize; /* Must be 36 */
-	__le16 DialectCount;
-	__le16 SecurityMode;
-	__le16 Reserved;	/* MBZ */
-	__le32 Capabilities;
-	__u8   ClientGUID[SMB2_CLIENT_GUID_SIZE];
-	/* In SMB3.02 and earlier next three were MBZ le64 ClientStartTime */
-	__le32 NegotiateContextOffset; /* SMB3.1.1 only. MBZ earlier */
-	__le16 NegotiateContextCount;  /* SMB3.1.1 only. MBZ earlier */
-	__le16 Reserved2;
-	__le16 Dialects[4]; /* BB expand this if autonegotiate > 4 dialects */
-} __packed;
-
-/* Dialects */
-#define SMB10_PROT_ID 0x0000 /* local only, not sent on wire w/CIFS negprot */
-#define SMB20_PROT_ID 0x0202
-#define SMB21_PROT_ID 0x0210
-#define SMB30_PROT_ID 0x0300
-#define SMB302_PROT_ID 0x0302
-#define SMB311_PROT_ID 0x0311
-#define BAD_PROT_ID   0xFFFF
-
-/* SecurityMode flags */
-#define	SMB2_NEGOTIATE_SIGNING_ENABLED	0x0001
-#define SMB2_NEGOTIATE_SIGNING_REQUIRED	0x0002
-#define SMB2_SEC_MODE_FLAGS_ALL		0x0003
-
-/* Capabilities flags */
-#define SMB2_GLOBAL_CAP_DFS		0x00000001
-#define SMB2_GLOBAL_CAP_LEASING		0x00000002 /* Resp only New to SMB2.1 */
-#define SMB2_GLOBAL_CAP_LARGE_MTU	0X00000004 /* Resp only New to SMB2.1 */
-#define SMB2_GLOBAL_CAP_MULTI_CHANNEL	0x00000008 /* New to SMB3 */
-#define SMB2_GLOBAL_CAP_PERSISTENT_HANDLES 0x00000010 /* New to SMB3 */
-#define SMB2_GLOBAL_CAP_DIRECTORY_LEASING  0x00000020 /* New to SMB3 */
-#define SMB2_GLOBAL_CAP_ENCRYPTION	0x00000040 /* New to SMB3 */
-/* Internal types */
-#define SMB2_NT_FIND			0x00100000
-#define SMB2_LARGE_FILES		0x00200000
-
-
-/* Negotiate Contexts - ContextTypes. See MS-SMB2 section 2.2.3.1 for details */
-#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES	cpu_to_le16(1)
-#define SMB2_ENCRYPTION_CAPABILITIES		cpu_to_le16(2)
-#define SMB2_COMPRESSION_CAPABILITIES		cpu_to_le16(3)
-#define SMB2_NETNAME_NEGOTIATE_CONTEXT_ID	cpu_to_le16(5)
-#define SMB2_TRANSPORT_CAPABILITIES		cpu_to_le16(6)
-#define SMB2_RDMA_TRANSFORM_CAPABILITIES	cpu_to_le16(7)
-#define SMB2_SIGNING_CAPABILITIES		cpu_to_le16(8)
-#define SMB2_POSIX_EXTENSIONS_AVAILABLE		cpu_to_le16(0x100)
-
-struct smb2_neg_context {
-	__le16	ContextType;
-	__le16	DataLength;
-	__le32	Reserved;
-	/* Followed by array of data. NOTE: some servers require padding to 8 byte boundary */
-} __packed;
-
-#define SMB311_LINUX_CLIENT_SALT_SIZE			32
-/* Hash Algorithm Types */
-#define SMB2_PREAUTH_INTEGRITY_SHA512	cpu_to_le16(0x0001)
-#define SMB2_PREAUTH_HASH_SIZE 64
-
-/*
- * SaltLength that the server send can be zero, so the only three required
- * fields (all __le16) end up six bytes total, so the minimum context data len
- * in the response is six bytes which accounts for
- *
- *      HashAlgorithmCount, SaltLength, and 1 HashAlgorithm.
- */
-#define MIN_PREAUTH_CTXT_DATA_LEN 6
-
-struct smb2_preauth_neg_context {
-	__le16	ContextType; /* 1 */
-	__le16	DataLength;
-	__le32	Reserved;
-	__le16	HashAlgorithmCount; /* 1 */
-	__le16	SaltLength;
-	__le16	HashAlgorithms; /* HashAlgorithms[0] since only one defined */
-	__u8	Salt[SMB311_LINUX_CLIENT_SALT_SIZE];
-} __packed;
-
-/* Encryption Algorithms Ciphers */
-#define SMB2_ENCRYPTION_AES128_CCM	cpu_to_le16(0x0001)
-#define SMB2_ENCRYPTION_AES128_GCM	cpu_to_le16(0x0002)
-/* we currently do not request AES256_CCM since presumably GCM faster */
-#define SMB2_ENCRYPTION_AES256_CCM      cpu_to_le16(0x0003)
-#define SMB2_ENCRYPTION_AES256_GCM      cpu_to_le16(0x0004)
-
-/* Min encrypt context data is one cipher so 2 bytes + 2 byte count field */
-#define MIN_ENCRYPT_CTXT_DATA_LEN	4
-struct smb2_encryption_neg_context {
-	__le16	ContextType; /* 2 */
-	__le16	DataLength;
-	__le32	Reserved;
-	/* CipherCount usally 2, but can be 3 when AES256-GCM enabled */
-	__le16	CipherCount; /* AES128-GCM and AES128-CCM by default */
-	__le16	Ciphers[3];
-} __packed;
-
-/* See MS-SMB2 2.2.3.1.3 */
-#define SMB3_COMPRESS_NONE	cpu_to_le16(0x0000)
-#define SMB3_COMPRESS_LZNT1	cpu_to_le16(0x0001)
-#define SMB3_COMPRESS_LZ77	cpu_to_le16(0x0002)
-#define SMB3_COMPRESS_LZ77_HUFF	cpu_to_le16(0x0003)
-/* Pattern scanning algorithm See MS-SMB2 3.1.4.4.1 */
-#define SMB3_COMPRESS_PATTERN	cpu_to_le16(0x0004) /* Pattern_V1 */
-
-/* Compression Flags */
-#define SMB2_COMPRESSION_CAPABILITIES_FLAG_NONE		cpu_to_le32(0x00000000)
-#define SMB2_COMPRESSION_CAPABILITIES_FLAG_CHAINED	cpu_to_le32(0x00000001)
-
-struct smb2_compression_capabilities_context {
-	__le16	ContextType; /* 3 */
-	__le16  DataLength;
-	__u32	Reserved;
-	__le16	CompressionAlgorithmCount;
-	__u16	Padding;
-	__u32	Flags;
-	__le16	CompressionAlgorithms[3];
-	__u16	Pad;  /* Some servers require pad to DataLen multiple of 8 */
-	/* Check if pad needed */
-} __packed;
-
-/*
- * For smb2_netname_negotiate_context_id See MS-SMB2 2.2.3.1.4.
- * Its struct simply contains NetName, an array of Unicode characters
- */
-struct smb2_netname_neg_context {
-	__le16	ContextType; /* 5 */
-	__le16	DataLength;
-	__le32	Reserved;
-	__le16	NetName[]; /* hostname of target converted to UCS-2 */
-} __packed;
-
-/*
- * For smb2_transport_capabilities context see MS-SMB2 2.2.3.1.5
- * and 2.2.4.1.5
- */
-
-/* Flags */
-#define SMB2_ACCEPT_TRANSFORM_LEVEL_SECURITY	0x00000001
-
-struct smb2_transport_capabilities_context {
-	__le16	ContextType; /* 6 */
-	__le16  DataLength;
-	__u32	Reserved;
-	__le32	Flags;
-	__u32	Pad;
-} __packed;
-
-/*
- * For rdma transform capabilities context see MS-SMB2 2.2.3.1.6
- * and 2.2.4.1.6
- */
-
-/* RDMA Transform IDs */
-#define SMB2_RDMA_TRANSFORM_NONE	0x0000
-#define SMB2_RDMA_TRANSFORM_ENCRYPTION	0x0001
-#define SMB2_RDMA_TRANSFORM_SIGNING	0x0002
-
-struct smb2_rdma_transform_capabilities_context {
-	__le16	ContextType; /* 7 */
-	__le16  DataLength;
-	__u32	Reserved;
-	__le16	TransformCount;
-	__u16	Reserved1;
-	__u32	Reserved2;
-	__le16	RDMATransformIds[];
-} __packed;
-
-/*
- * For signing capabilities context see MS-SMB2 2.2.3.1.7
- * and 2.2.4.1.7
- */
-
-/* Signing algorithms */
-#define SIGNING_ALG_HMAC_SHA256	0
-#define SIGNING_ALG_AES_CMAC	1
-#define SIGNING_ALG_AES_GMAC	2
-
-struct smb2_signing_capabilities {
-	__le16	ContextType; /* 8 */
-	__le16	DataLength;
-	__u32	Reserved;
-	__le16	SigningAlgorithmCount;
-	__le16	SigningAlgorithms[];
-	/*  Followed by padding to 8 byte boundary (required by some servers) */
-} __packed;
-
-#define POSIX_CTXT_DATA_LEN	16
-struct smb2_posix_neg_context {
-	__le16	ContextType; /* 0x100 */
-	__le16	DataLength;
-	__le32	Reserved;
-	__u8	Name[16]; /* POSIX ctxt GUID 93AD25509CB411E7B42383DE968BCD7C */
-} __packed;
-
-struct smb2_negotiate_rsp {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize;	/* Must be 65 */
-	__le16 SecurityMode;
-	__le16 DialectRevision;
-	__le16 NegotiateContextCount;	/* Prior to SMB3.1.1 was Reserved & MBZ */
-	__u8   ServerGUID[16];
-	__le32 Capabilities;
-	__le32 MaxTransactSize;
-	__le32 MaxReadSize;
-	__le32 MaxWriteSize;
-	__le64 SystemTime;	/* MBZ */
-	__le64 ServerStartTime;
-	__le16 SecurityBufferOffset;
-	__le16 SecurityBufferLength;
-	__le32 NegotiateContextOffset;	/* Pre:SMB3.1.1 was reserved/ignored */
-	__u8   Buffer[1];	/* variable length GSS security buffer */
-} __packed;
-
-/* Flags */
-#define SMB2_SESSION_REQ_FLAG_BINDING		0x01
-#define SMB2_SESSION_REQ_FLAG_ENCRYPT_DATA	0x04
-
-struct smb2_sess_setup_req {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize; /* Must be 25 */
-	__u8   Flags;
-	__u8   SecurityMode;
-	__le32 Capabilities;
-	__le32 Channel;
-	__le16 SecurityBufferOffset;
-	__le16 SecurityBufferLength;
-	__u64 PreviousSessionId;
-	__u8   Buffer[1];	/* variable length GSS security buffer */
-} __packed;
-
-/* Currently defined SessionFlags */
-#define SMB2_SESSION_FLAG_IS_GUEST	0x0001
-#define SMB2_SESSION_FLAG_IS_NULL	0x0002
-#define SMB2_SESSION_FLAG_ENCRYPT_DATA	0x0004
-struct smb2_sess_setup_rsp {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize; /* Must be 9 */
-	__le16 SessionFlags;
-	__le16 SecurityBufferOffset;
-	__le16 SecurityBufferLength;
-	__u8   Buffer[1];	/* variable length GSS security buffer */
-} __packed;
-
-struct smb2_logoff_req {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize;	/* Must be 4 */
-	__le16 Reserved;
-} __packed;
-
-struct smb2_logoff_rsp {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize;	/* Must be 4 */
-	__le16 Reserved;
-} __packed;
-
-/* Flags/Reserved for SMB3.1.1 */
-#define SMB2_TREE_CONNECT_FLAG_CLUSTER_RECONNECT cpu_to_le16(0x0001)
-#define SMB2_TREE_CONNECT_FLAG_REDIRECT_TO_OWNER cpu_to_le16(0x0002)
-#define SMB2_TREE_CONNECT_FLAG_EXTENSION_PRESENT cpu_to_le16(0x0004)
-
-struct smb2_tree_connect_req {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize;	/* Must be 9 */
-	__le16 Flags; /* Reserved MBZ for dialects prior to SMB3.1.1 */
-	__le16 PathOffset;
-	__le16 PathLength;
-	__u8   Buffer[1];	/* variable length */
-} __packed;
-
-/* See MS-SMB2 section 2.2.9.2 */
-/* Context Types */
-#define SMB2_RESERVED_TREE_CONNECT_CONTEXT_ID 0x0000
-#define SMB2_REMOTED_IDENTITY_TREE_CONNECT_CONTEXT_ID cpu_to_le16(0x0001)
-
-struct tree_connect_contexts {
-	__le16 ContextType;
-	__le16 DataLength;
-	__le32 Reserved;
-	__u8   Data[];
-} __packed;
-
-/* Remoted identity tree connect context structures - see MS-SMB2 2.2.9.2.1 */
-struct smb3_blob_data {
-	__le16 BlobSize;
-	__u8   BlobData[];
-} __packed;
-
-/* Valid values for Attr */
-#define SE_GROUP_MANDATORY		0x00000001
-#define SE_GROUP_ENABLED_BY_DEFAULT	0x00000002
-#define SE_GROUP_ENABLED		0x00000004
-#define SE_GROUP_OWNER			0x00000008
-#define SE_GROUP_USE_FOR_DENY_ONLY	0x00000010
-#define SE_GROUP_INTEGRITY		0x00000020
-#define SE_GROUP_INTEGRITY_ENABLED	0x00000040
-#define SE_GROUP_RESOURCE		0x20000000
-#define SE_GROUP_LOGON_ID		0xC0000000
-
-/* struct sid_attr_data is SidData array in BlobData format then le32 Attr */
-
-struct sid_array_data {
-	__le16 SidAttrCount;
-	/* SidAttrList - array of sid_attr_data structs */
-} __packed;
-
-struct luid_attr_data {
-
-} __packed;
-
-/*
- * struct privilege_data is the same as BLOB_DATA - see MS-SMB2 2.2.9.2.1.5
- * but with size of LUID_ATTR_DATA struct and BlobData set to LUID_ATTR DATA
- */
-
-struct privilege_array_data {
-	__le16 PrivilegeCount;
-	/* array of privilege_data structs */
-} __packed;
-
-struct remoted_identity_tcon_context {
-	__le16 TicketType; /* must be 0x0001 */
-	__le16 TicketSize; /* total size of this struct */
-	__le16 User; /* offset to SID_ATTR_DATA struct with user info */
-	__le16 UserName; /* offset to null terminated Unicode username string */
-	__le16 Domain; /* offset to null terminated Unicode domain name */
-	__le16 Groups; /* offset to SID_ARRAY_DATA struct with group info */
-	__le16 RestrictedGroups; /* similar to above */
-	__le16 Privileges; /* offset to PRIVILEGE_ARRAY_DATA struct */
-	__le16 PrimaryGroup; /* offset to SID_ARRAY_DATA struct */
-	__le16 Owner; /* offset to BLOB_DATA struct */
-	__le16 DefaultDacl; /* offset to BLOB_DATA struct */
-	__le16 DeviceGroups; /* offset to SID_ARRAY_DATA struct */
-	__le16 UserClaims; /* offset to BLOB_DATA struct */
-	__le16 DeviceClaims; /* offset to BLOB_DATA struct */
-	__u8   TicketInfo[]; /* variable length buf - remoted identity data */
-} __packed;
-
-struct smb2_tree_connect_req_extension {
-	__le32 TreeConnectContextOffset;
-	__le16 TreeConnectContextCount;
-	__u8  Reserved[10];
-	__u8  PathName[]; /* variable sized array */
-	/* followed by array of TreeConnectContexts */
-} __packed;
-
-struct smb2_tree_connect_rsp {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize;	/* Must be 16 */
-	__u8   ShareType;  /* see below */
-	__u8   Reserved;
-	__le32 ShareFlags; /* see below */
-	__le32 Capabilities; /* see below */
-	__le32 MaximalAccess;
-} __packed;
-
-/* Possible ShareType values */
-#define SMB2_SHARE_TYPE_DISK	0x01
-#define SMB2_SHARE_TYPE_PIPE	0x02
-#define	SMB2_SHARE_TYPE_PRINT	0x03
-
-/*
- * Possible ShareFlags - exactly one and only one of the first 4 caching flags
- * must be set (any of the remaining, SHI1005, flags may be set individually
- * or in combination.
- */
-#define SMB2_SHAREFLAG_MANUAL_CACHING			0x00000000
-#define SMB2_SHAREFLAG_AUTO_CACHING			0x00000010
-#define SMB2_SHAREFLAG_VDO_CACHING			0x00000020
-#define SMB2_SHAREFLAG_NO_CACHING			0x00000030
-#define SHI1005_FLAGS_DFS				0x00000001
-#define SHI1005_FLAGS_DFS_ROOT				0x00000002
-#define SHI1005_FLAGS_RESTRICT_EXCLUSIVE_OPENS		0x00000100
-#define SHI1005_FLAGS_FORCE_SHARED_DELETE		0x00000200
-#define SHI1005_FLAGS_ALLOW_NAMESPACE_CACHING		0x00000400
-#define SHI1005_FLAGS_ACCESS_BASED_DIRECTORY_ENUM	0x00000800
-#define SHI1005_FLAGS_FORCE_LEVELII_OPLOCK		0x00001000
-#define SHI1005_FLAGS_ENABLE_HASH_V1			0x00002000
-#define SHI1005_FLAGS_ENABLE_HASH_V2			0x00004000
-#define SHI1005_FLAGS_ENCRYPT_DATA			0x00008000
-#define SMB2_SHAREFLAG_IDENTITY_REMOTING		0x00040000 /* 3.1.1 */
-#define SMB2_SHAREFLAG_COMPRESS_DATA			0x00100000 /* 3.1.1 */
-#define SHI1005_FLAGS_ALL				0x0014FF33
-
-/* Possible share capabilities */
-#define SMB2_SHARE_CAP_DFS	cpu_to_le32(0x00000008) /* all dialects */
-#define SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY cpu_to_le32(0x00000010) /* 3.0 */
-#define SMB2_SHARE_CAP_SCALEOUT	cpu_to_le32(0x00000020) /* 3.0 */
-#define SMB2_SHARE_CAP_CLUSTER	cpu_to_le32(0x00000040) /* 3.0 */
-#define SMB2_SHARE_CAP_ASYMMETRIC cpu_to_le32(0x00000080) /* 3.02 */
-#define SMB2_SHARE_CAP_REDIRECT_TO_OWNER cpu_to_le32(0x00000100) /* 3.1.1 */
-
-struct smb2_tree_disconnect_req {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize;	/* Must be 4 */
-	__le16 Reserved;
-} __packed;
-
-struct smb2_tree_disconnect_rsp {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize;	/* Must be 4 */
-	__le16 Reserved;
-} __packed;
-
-/* File Attrubutes */
-#define FILE_ATTRIBUTE_READONLY			0x00000001
-#define FILE_ATTRIBUTE_HIDDEN			0x00000002
-#define FILE_ATTRIBUTE_SYSTEM			0x00000004
-#define FILE_ATTRIBUTE_DIRECTORY		0x00000010
-#define FILE_ATTRIBUTE_ARCHIVE			0x00000020
-#define FILE_ATTRIBUTE_NORMAL			0x00000080
-#define FILE_ATTRIBUTE_TEMPORARY		0x00000100
-#define FILE_ATTRIBUTE_SPARSE_FILE		0x00000200
-#define FILE_ATTRIBUTE_REPARSE_POINT		0x00000400
-#define FILE_ATTRIBUTE_COMPRESSED		0x00000800
-#define FILE_ATTRIBUTE_OFFLINE			0x00001000
-#define FILE_ATTRIBUTE_NOT_CONTENT_INDEXED	0x00002000
-#define FILE_ATTRIBUTE_ENCRYPTED		0x00004000
-#define FILE_ATTRIBUTE_INTEGRITY_STREAM		0x00008000
-#define FILE_ATTRIBUTE_NO_SCRUB_DATA		0x00020000
-
-/* Oplock levels */
-#define SMB2_OPLOCK_LEVEL_NONE		0x00
-#define SMB2_OPLOCK_LEVEL_II		0x01
-#define SMB2_OPLOCK_LEVEL_EXCLUSIVE	0x08
-#define SMB2_OPLOCK_LEVEL_BATCH		0x09
-#define SMB2_OPLOCK_LEVEL_LEASE		0xFF
-/* Non-spec internal type */
-#define SMB2_OPLOCK_LEVEL_NOCHANGE	0x99
-
-/* Desired Access Flags */
-#define FILE_READ_DATA_LE		cpu_to_le32(0x00000001)
-#define FILE_WRITE_DATA_LE		cpu_to_le32(0x00000002)
-#define FILE_APPEND_DATA_LE		cpu_to_le32(0x00000004)
-#define FILE_READ_EA_LE			cpu_to_le32(0x00000008)
-#define FILE_WRITE_EA_LE		cpu_to_le32(0x00000010)
-#define FILE_EXECUTE_LE			cpu_to_le32(0x00000020)
-#define FILE_READ_ATTRIBUTES_LE		cpu_to_le32(0x00000080)
-#define FILE_WRITE_ATTRIBUTES_LE	cpu_to_le32(0x00000100)
-#define FILE_DELETE_LE			cpu_to_le32(0x00010000)
-#define FILE_READ_CONTROL_LE		cpu_to_le32(0x00020000)
-#define FILE_WRITE_DAC_LE		cpu_to_le32(0x00040000)
-#define FILE_WRITE_OWNER_LE		cpu_to_le32(0x00080000)
-#define FILE_SYNCHRONIZE_LE		cpu_to_le32(0x00100000)
-#define FILE_ACCESS_SYSTEM_SECURITY_LE	cpu_to_le32(0x01000000)
-#define FILE_MAXIMAL_ACCESS_LE		cpu_to_le32(0x02000000)
-#define FILE_GENERIC_ALL_LE		cpu_to_le32(0x10000000)
-#define FILE_GENERIC_EXECUTE_LE		cpu_to_le32(0x20000000)
-#define FILE_GENERIC_WRITE_LE		cpu_to_le32(0x40000000)
-#define FILE_GENERIC_READ_LE		cpu_to_le32(0x80000000)
-
-/* ShareAccess Flags */
-#define FILE_SHARE_READ_LE		cpu_to_le32(0x00000001)
-#define FILE_SHARE_WRITE_LE		cpu_to_le32(0x00000002)
-#define FILE_SHARE_DELETE_LE		cpu_to_le32(0x00000004)
-#define FILE_SHARE_ALL_LE		cpu_to_le32(0x00000007)
-
-/* CreateDisposition Flags */
-#define FILE_SUPERSEDE_LE		cpu_to_le32(0x00000000)
-#define FILE_OPEN_LE			cpu_to_le32(0x00000001)
-#define FILE_CREATE_LE			cpu_to_le32(0x00000002)
-#define	FILE_OPEN_IF_LE			cpu_to_le32(0x00000003)
-#define FILE_OVERWRITE_LE		cpu_to_le32(0x00000004)
-#define FILE_OVERWRITE_IF_LE		cpu_to_le32(0x00000005)
-
-/* CreateOptions Flags */
-#define FILE_DIRECTORY_FILE_LE		cpu_to_le32(0x00000001)
-/* same as #define CREATE_NOT_FILE_LE	cpu_to_le32(0x00000001) */
-#define FILE_WRITE_THROUGH_LE		cpu_to_le32(0x00000002)
-#define FILE_SEQUENTIAL_ONLY_LE		cpu_to_le32(0x00000004)
-#define FILE_NO_INTERMEDIATE_BUFFERRING_LE cpu_to_le32(0x00000008)
-#define FILE_SYNCHRONOUS_IO_ALERT_LE	cpu_to_le32(0x00000010)
-#define FILE_SYNCHRONOUS_IO_NON_ALERT_LE	cpu_to_le32(0x00000020)
-#define FILE_NON_DIRECTORY_FILE_LE	cpu_to_le32(0x00000040)
-#define FILE_COMPLETE_IF_OPLOCKED_LE	cpu_to_le32(0x00000100)
-#define FILE_NO_EA_KNOWLEDGE_LE		cpu_to_le32(0x00000200)
-#define FILE_RANDOM_ACCESS_LE		cpu_to_le32(0x00000800)
-#define FILE_DELETE_ON_CLOSE_LE		cpu_to_le32(0x00001000)
-#define FILE_OPEN_BY_FILE_ID_LE		cpu_to_le32(0x00002000)
-#define FILE_OPEN_FOR_BACKUP_INTENT_LE	cpu_to_le32(0x00004000)
-#define FILE_NO_COMPRESSION_LE		cpu_to_le32(0x00008000)
-#define FILE_RESERVE_OPFILTER_LE	cpu_to_le32(0x00100000)
-#define FILE_OPEN_REPARSE_POINT_LE	cpu_to_le32(0x00200000)
-#define FILE_OPEN_NO_RECALL_LE		cpu_to_le32(0x00400000)
-#define FILE_OPEN_FOR_FREE_SPACE_QUERY_LE cpu_to_le32(0x00800000)
-
-#define FILE_READ_RIGHTS_LE (FILE_READ_DATA_LE | FILE_READ_EA_LE \
-			| FILE_READ_ATTRIBUTES_LE)
-#define FILE_WRITE_RIGHTS_LE (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE \
-			| FILE_WRITE_EA_LE | FILE_WRITE_ATTRIBUTES_LE)
-#define FILE_EXEC_RIGHTS_LE (FILE_EXECUTE_LE)
-
-/* Impersonation Levels. See MS-WPO section 9.7 and MSDN-IMPERS */
-#define IL_ANONYMOUS		cpu_to_le32(0x00000000)
-#define IL_IDENTIFICATION	cpu_to_le32(0x00000001)
-#define IL_IMPERSONATION	cpu_to_le32(0x00000002)
-#define IL_DELEGATE		cpu_to_le32(0x00000003)
-
-/* Create Context Values */
-#define SMB2_CREATE_EA_BUFFER			"ExtA" /* extended attributes */
-#define SMB2_CREATE_SD_BUFFER			"SecD" /* security descriptor */
-#define SMB2_CREATE_DURABLE_HANDLE_REQUEST	"DHnQ"
-#define SMB2_CREATE_DURABLE_HANDLE_RECONNECT	"DHnC"
-#define SMB2_CREATE_ALLOCATION_SIZE		"AISi"
-#define SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST "MxAc"
-#define SMB2_CREATE_TIMEWARP_REQUEST		"TWrp"
-#define SMB2_CREATE_QUERY_ON_DISK_ID		"QFid"
-#define SMB2_CREATE_REQUEST_LEASE		"RqLs"
-#define SMB2_CREATE_DURABLE_HANDLE_REQUEST_V2	"DH2Q"
-#define SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2	"DH2C"
-#define SMB2_CREATE_APP_INSTANCE_ID	0x45BCA66AEFA7F74A9008FA462E144D74
-#define SMB2_CREATE_APP_INSTANCE_VERSION 0xB982D0B73B56074FA07B524A8116A010
-#define SVHDX_OPEN_DEVICE_CONTEX	0x9CCBCF9E04C1E643980E158DA1F6EC83
-#define SMB2_CREATE_TAG_POSIX		0x93AD25509CB411E7B42383DE968BCD7C
-
-/* Flag (SMB3 open response) values */
-#define SMB2_CREATE_FLAG_REPARSEPOINT 0x01
-
 /*
  * Maximum number of iovs we need for an open/create request.
  * [0] : struct smb2_create_req
···
  */
 #define SMB2_CREATE_IOV_SIZE 8
 
-struct smb2_create_req {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize;	/* Must be 57 */
-	__u8   SecurityFlags;
-	__u8   RequestedOplockLevel;
-	__le32 ImpersonationLevel;
-	__le64 SmbCreateFlags;
-	__le64 Reserved;
-	__le32 DesiredAccess;
-	__le32 FileAttributes;
-	__le32 ShareAccess;
-	__le32 CreateDisposition;
-	__le32 CreateOptions;
-	__le16 NameOffset;
-	__le16 NameLength;
-	__le32 CreateContextsOffset;
-	__le32 CreateContextsLength;
-	__u8   Buffer[];
-} __packed;
-
 /*
  * Maximum size of a SMB2_CREATE response is 64 (smb2 header) +
  * 88 (fixed part of create response) + 520 (path) + 208 (contexts) +
  * 2 bytes of padding.
  */
 #define MAX_SMB2_CREATE_RESPONSE_SIZE 880
-
-struct smb2_create_rsp {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize;	/* Must be 89 */
-	__u8   OplockLevel;
-	__u8   Flag;  /* 0x01 if reparse point */
-	__le32 CreateAction;
-	__le64 CreationTime;
-	__le64 LastAccessTime;
-	__le64 LastWriteTime;
-	__le64 ChangeTime;
-	__le64 AllocationSize;
-	__le64 EndofFile;
-	__le32 FileAttributes;
-	__le32 Reserved2;
-	__u64  PersistentFileId; /* opaque endianness */
-	__u64  VolatileFileId; /* opaque endianness */
-	__le32 CreateContextsOffset;
-	__le32 CreateContextsLength;
-	__u8   Buffer[1];
-} __packed;
-
-struct create_context {
-	__le32 Next;
-	__le16 NameOffset;
-	__le16 NameLength;
-	__le16 Reserved;
-	__le16 DataOffset;
-	__le32 DataLength;
-	__u8 Buffer[];
-} __packed;
 
 #define SMB2_LEASE_READ_CACHING_HE	0x01
 #define SMB2_LEASE_HANDLE_CACHING_HE	0x02
···
 #define SMB2_IOCTL_IOV_SIZE 2
 
 struct smb2_ioctl_req {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize;	/* Must be 57 */
 	__u16 Reserved;
 	__le32 CtlCode;
···
 } __packed;
 
 struct smb2_ioctl_rsp {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize;	/* Must be 57 */
 	__u16 Reserved;
 	__le32 CtlCode;
···
 	__le32 Flags;
 	__u32  Reserved2;
 	/* char * buffer[] */
-} __packed;
-
-/* Currently defined values for close flags */
-#define SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB	cpu_to_le16(0x0001)
-struct smb2_close_req {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize;	/* Must be 24 */
-	__le16 Flags;
-	__le32 Reserved;
-	__u64  PersistentFileId; /* opaque endianness */
-	__u64  VolatileFileId; /* opaque endianness */
-} __packed;
-
-/*
- * Maximum size of a SMB2_CLOSE response is 64 (smb2 header) + 60 (data)
- */
-#define MAX_SMB2_CLOSE_RESPONSE_SIZE 124
-
-struct smb2_close_rsp {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize; /* 60 */
-	__le16 Flags;
-	__le32 Reserved;
-	__le64 CreationTime;
-	__le64 LastAccessTime;
-	__le64 LastWriteTime;
-	__le64 ChangeTime;
-	__le64 AllocationSize;	/* Beginning of FILE_STANDARD_INFO equivalent */
-	__le64 EndOfFile;
-	__le32 Attributes;
-} __packed;
-
-struct smb2_flush_req {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize;	/* Must be 24 */
-	__le16 Reserved1;
-	__le32 Reserved2;
-	__u64  PersistentFileId; /* opaque endianness */
-	__u64  VolatileFileId; /* opaque endianness */
-} __packed;
-
-struct smb2_flush_rsp {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize;
-	__le16 Reserved;
-} __packed;
-
-/* For read request Flags field below, following flag is defined for SMB3.02 */
-#define SMB2_READFLAG_READ_UNBUFFERED	0x01
-#define SMB2_READFLAG_REQUEST_COMPRESSED 0x02 /* See MS-SMB2 2.2.19 */
-
-/* Channel field for read and write: exactly one of following flags can be set*/
-#define SMB2_CHANNEL_NONE	cpu_to_le32(0x00000000)
-#define SMB2_CHANNEL_RDMA_V1	cpu_to_le32(0x00000001) /* SMB3 or later */
-#define SMB2_CHANNEL_RDMA_V1_INVALIDATE cpu_to_le32(0x00000002) /* >= SMB3.02 */
-#define SMB2_CHANNEL_RDMA_TRANSFORM cpu_to_le32(0x00000003) /* >= SMB3.02, only used on write */
-
-/* SMB2 read request without RFC1001 length at the beginning */
-struct smb2_read_plain_req {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize; /* Must be 49 */
-	__u8   Padding; /* offset from start of SMB2 header to place read */
-	__u8   Flags; /* MBZ unless SMB3.02 or later */
-	__le32 Length;
-	__le64 Offset;
-	__u64  PersistentFileId; /* opaque endianness */
-	__u64  VolatileFileId; /* opaque endianness */
-	__le32 MinimumCount;
-	__le32 Channel; /* MBZ except for SMB3 or later */
-	__le32 RemainingBytes;
-	__le16 ReadChannelInfoOffset;
-	__le16 ReadChannelInfoLength;
-	__u8   Buffer[1];
-} __packed;
-
-/* Read flags */
-#define SMB2_READFLAG_RESPONSE_NONE	0x00000000
-#define SMB2_READFLAG_RESPONSE_RDMA_TRANSFORM	0x00000001
-
-struct smb2_read_rsp {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize; /* Must be 17 */
-	__u8   DataOffset;
-	__u8   Reserved;
-	__le32 DataLength;
-	__le32 DataRemaining;
-	__u32  Flags;
-	__u8   Buffer[1];
-} __packed;
-
-/* For write request Flags field below the following flags are defined: */
-#define SMB2_WRITEFLAG_WRITE_THROUGH	0x00000001	/* SMB2.1 or later */
-#define SMB2_WRITEFLAG_WRITE_UNBUFFERED	0x00000002	/* SMB3.02 or later */
-
-struct smb2_write_req {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize; /* Must be 49 */
-	__le16 DataOffset; /* offset from start of SMB2 header to write data */
-	__le32 Length;
-	__le64 Offset;
-	__u64  PersistentFileId; /* opaque endianness */
-	__u64  VolatileFileId; /* opaque endianness */
-	__le32 Channel; /* MBZ unless SMB3.02 or later */
-	__le32 RemainingBytes;
-	__le16 WriteChannelInfoOffset;
-	__le16 WriteChannelInfoLength;
-	__le32 Flags;
-	__u8   Buffer[1];
-} __packed;
-
-struct smb2_write_rsp {
-	struct smb2_sync_hdr sync_hdr;
-	__le16 StructureSize; /* Must be 17 */
-	__u8   DataOffset;
-	__u8   Reserved;
-	__le32 DataLength;
-	__le32 DataRemaining;
-	__u32  Reserved2;
-	__u8   Buffer[1];
-} __packed;
-
-/* notify flags */
-#define SMB2_WATCH_TREE			0x0001
-
-/* notify completion filter flags. See MS-FSCC 2.6 and MS-SMB2 2.2.35 */
-#define FILE_NOTIFY_CHANGE_FILE_NAME		0x00000001
-#define FILE_NOTIFY_CHANGE_DIR_NAME		0x00000002
-#define FILE_NOTIFY_CHANGE_ATTRIBUTES		0x00000004
-#define FILE_NOTIFY_CHANGE_SIZE			0x00000008
-#define FILE_NOTIFY_CHANGE_LAST_WRITE		0x00000010
-#define FILE_NOTIFY_CHANGE_LAST_ACCESS		0x00000020
-#define FILE_NOTIFY_CHANGE_CREATION		0x00000040
-#define FILE_NOTIFY_CHANGE_EA			0x00000080
-#define FILE_NOTIFY_CHANGE_SECURITY		0x00000100
-#define FILE_NOTIFY_CHANGE_STREAM_NAME		0x00000200
-#define FILE_NOTIFY_CHANGE_STREAM_SIZE		0x00000400
-#define FILE_NOTIFY_CHANGE_STREAM_WRITE		0x00000800
-
-struct smb2_change_notify_req {
-	struct smb2_sync_hdr sync_hdr;
-	__le16	StructureSize;
-	__le16	Flags;
-	__le32	OutputBufferLength;
-	__u64	PersistentFileId; /* opaque endianness */
-	__u64	VolatileFileId; /* opaque endianness */
-	__le32	CompletionFilter;
-	__u32	Reserved;
-} __packed;
-
-struct smb2_change_notify_rsp {
-	struct smb2_sync_hdr sync_hdr;
-	__le16	StructureSize;  /* Must be 9 */
-	__le16	OutputBufferOffset;
-	__le32	OutputBufferLength;
-	__u8	Buffer[1]; /* array of file notify structs */
 } __packed;
 
 #define SMB2_LOCKFLAG_SHARED_LOCK	0x0001
···
 } __packed;
 
 struct smb2_lock_req {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize; /* Must be 48 */
 	__le16 LockCount;
 	/*
···
 } __packed;
 
 struct smb2_lock_rsp {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize; /* Must be 4 */
 	__le16 Reserved;
 } __packed;
 
 struct smb2_echo_req {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize;	/* Must be 4 */
 	__u16  Reserved;
 } __packed;
 
 struct smb2_echo_rsp {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize;	/* Must be 4 */
 	__u16  Reserved;
 } __packed;
···
  */
 
 struct smb2_query_directory_req {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize; /* Must be 33 */
 	__u8   FileInformationClass;
 	__u8   Flags;
···
 } __packed;
 
 struct smb2_query_directory_rsp {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize; /* Must be 9 */
 	__le16 OutputBufferOffset;
 	__le32 OutputBufferLength;
···
 #define SL_INDEX_SPECIFIED	0x00000004
 
 struct smb2_query_info_req {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize; /* Must be 41 */
 	__u8   InfoType;
 	__u8   FileInfoClass;
···
 } __packed;
 
 struct smb2_query_info_rsp {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize; /* Must be 9 */
 	__le16 OutputBufferOffset;
 	__le32 OutputBufferLength;
···
 #define SMB2_SET_INFO_IOV_SIZE 3
 
 struct smb2_set_info_req {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize; /* Must be 33 */
 	__u8   InfoType;
 	__u8   FileInfoClass;
···
 } __packed;
 
 struct smb2_set_info_rsp {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize; /* Must be 2 */
 } __packed;
 
 struct smb2_oplock_break {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize; /* Must be 24 */
 	__u8   OplockLevel;
 	__u8   Reserved;
···
 #define SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED cpu_to_le32(0x01)
 
 struct smb2_lease_break {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize; /* Must be 44 */
 	__le16 Epoch;
 	__le32 Flags;
···
 } __packed;
 
 struct smb2_lease_ack {
-	struct smb2_sync_hdr sync_hdr;
+	struct smb2_hdr hdr;
 	__le16 StructureSize; /* Must be 36 */
 	__le16 Reserved;
 	__le32 Flags;

fs/cifs/smb2proto.h

···
 			      struct TCP_Server_Info *server);
 extern unsigned int smb2_calc_size(void *buf, struct TCP_Server_Info *server);
 extern char *smb2_get_data_area_len(int *off, int *len,
-				    struct smb2_sync_hdr *shdr);
+				    struct smb2_hdr *shdr);
 extern __le16 *cifs_convert_path_to_utf16(const char *from,
 					  struct cifs_sb_info *cifs_sb);
 

fs/cifs/smb2transport.c

···
 #include <linux/mempool.h>
 #include <linux/highmem.h>
 #include <crypto/aead.h>
-#include "smb2pdu.h"
 #include "cifsglob.h"
 #include "cifsproto.h"
 #include "smb2proto.h"
···
 	unsigned char smb2_signature[SMB2_HMACSHA256_SIZE];
 	unsigned char *sigptr = smb2_signature;
 	struct kvec *iov = rqst->rq_iov;
-	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)iov[0].iov_base;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)iov[0].iov_base;
 	struct cifs_ses *ses;
 	struct shash_desc *shash;
 	struct crypto_shash *hash;
 	struct sdesc *sdesc = NULL;
 	struct smb_rqst drqst;
 
-	ses = smb2_find_smb_ses(server, shdr->SessionId);
+	ses = smb2_find_smb_ses(server, le64_to_cpu(shdr->SessionId));
 	if (!ses) {
 		cifs_server_dbg(VFS, "%s: Could not find session\n", __func__);
 		return 0;
···
 	unsigned char smb3_signature[SMB2_CMACAES_SIZE];
 	unsigned char *sigptr = smb3_signature;
 	struct kvec *iov = rqst->rq_iov;
-	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)iov[0].iov_base;
+	struct smb2_hdr *shdr = (struct smb2_hdr *)iov[0].iov_base;
 	struct shash_desc *shash;
 	struct crypto_shash *hash;
 	struct sdesc *sdesc = NULL;
 	struct smb_rqst drqst;
 	u8 key[SMB3_SIGN_KEY_SIZE];
 
-	rc = smb2_get_sign_key(shdr->SessionId, server, key);
+	rc = smb2_get_sign_key(le64_to_cpu(shdr->SessionId), server, key);
 	if (rc)
 		return 0;
 
···
 smb2_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server)
 {
 	int rc = 0;
-	struct smb2_sync_hdr *shdr;
+	struct smb2_hdr *shdr;
 	struct smb2_sess_setup_req *ssr;
 	bool is_binding;
 	bool is_signed;
 
-	shdr = (struct smb2_sync_hdr *)rqst->rq_iov[0].iov_base;
+	shdr = (struct smb2_hdr *)rqst->rq_iov[0].iov_base;
 	ssr = (struct smb2_sess_setup_req *)shdr;
 
 	is_binding = shdr->Command == SMB2_SESSION_SETUP &&
···
 {
 	unsigned int rc;
 	char server_response_sig[SMB2_SIGNATURE_SIZE];
-	struct smb2_sync_hdr *shdr =
-			(struct smb2_sync_hdr *)rqst->rq_iov[0].iov_base;
+	struct smb2_hdr *shdr =
+			(struct smb2_hdr *)rqst->rq_iov[0].iov_base;
 
 	if ((shdr->Command == SMB2_NEGOTIATE) ||
 	    (shdr->Command == SMB2_SESSION_SETUP) ||
···
  */
 static inline void
 smb2_seq_num_into_buf(struct TCP_Server_Info *server,
-		      struct smb2_sync_hdr *shdr)
+		      struct smb2_hdr *shdr)
 {
 	unsigned int i, num = le16_to_cpu(shdr->CreditCharge);
 
···
 }
 
 static struct mid_q_entry *
-smb2_mid_entry_alloc(const struct smb2_sync_hdr *shdr,
+smb2_mid_entry_alloc(const struct smb2_hdr *shdr,
 		     struct TCP_Server_Info *server)
 {
 	struct mid_q_entry *temp;
···
 
 	atomic_inc(&midCount);
 	temp->mid_state = MID_REQUEST_ALLOCATED;
-	trace_smb3_cmd_enter(shdr->TreeId, shdr->SessionId,
-		le16_to_cpu(shdr->Command), temp->mid);
+	trace_smb3_cmd_enter(le32_to_cpu(shdr->Id.SyncId.TreeId),
+			     le64_to_cpu(shdr->SessionId),
+			     le16_to_cpu(shdr->Command), temp->mid);
 	return temp;
 }
 
 static int
 smb2_get_mid_entry(struct cifs_ses *ses, struct TCP_Server_Info *server,
-		   struct smb2_sync_hdr *shdr, struct mid_q_entry **mid)
+		   struct smb2_hdr *shdr, struct mid_q_entry **mid)
 {
 	if (server->tcpStatus == CifsExiting)
 		return -ENOENT;
···
 		   struct smb_rqst *rqst)
 {
 	int rc;
-	struct smb2_sync_hdr *shdr =
-			(struct smb2_sync_hdr *)rqst->rq_iov[0].iov_base;
+	struct smb2_hdr *shdr =
+			(struct smb2_hdr *)rqst->rq_iov[0].iov_base;
 	struct mid_q_entry *mid;
 
 	smb2_seq_num_into_buf(server, shdr);
···
 smb2_setup_async_request(struct TCP_Server_Info *server, struct smb_rqst *rqst)
 {
 	int rc;
-	struct smb2_sync_hdr *shdr =
-			(struct smb2_sync_hdr *)rqst->rq_iov[0].iov_base;
+	struct smb2_hdr *shdr =
+			(struct smb2_hdr *)rqst->rq_iov[0].iov_base;
 	struct mid_q_entry *mid;
 
 	if (server->tcpStatus == CifsNeedNegotiate &&

fs/cifs/trace.h

···
 #define _CIFS_TRACE_H
 
 #include <linux/tracepoint.h>
+#include <linux/net.h>
+#include <linux/inet.h>
 
 /*
  * Please use this 3-part article as a reference for writing new tracepoints:
···
 	TP_ARGS(lease_state, tid, sesid, lease_key_low, lease_key_high, rc))
 
 DEFINE_SMB3_LEASE_ERR_EVENT(lease_err);
+
+DECLARE_EVENT_CLASS(smb3_connect_class,
+	TP_PROTO(char *hostname,
+		__u64 conn_id,
+		const struct __kernel_sockaddr_storage *dst_addr),
+	TP_ARGS(hostname, conn_id, dst_addr),
+	TP_STRUCT__entry(
+		__string(hostname, hostname)
+		__field(__u64, conn_id)
+		__array(__u8, dst_addr, sizeof(struct sockaddr_storage))
+	),
+	TP_fast_assign(
+		struct sockaddr_storage *pss = NULL;
+
+		__entry->conn_id = conn_id;
+		pss = (struct sockaddr_storage *)__entry->dst_addr;
+		*pss = *dst_addr;
+		__assign_str(hostname, hostname);
+	),
+	TP_printk("conn_id=0x%llx server=%s addr=%pISpsfc",
+		__entry->conn_id,
+		__get_str(hostname),
+		__entry->dst_addr)
+)
+
+#define DEFINE_SMB3_CONNECT_EVENT(name)        \
+DEFINE_EVENT(smb3_connect_class, smb3_##name,  \
+	TP_PROTO(char *hostname,		\
+		__u64 conn_id,			\
+		const struct __kernel_sockaddr_storage *addr),	\
+	TP_ARGS(hostname, conn_id, addr))
+
+DEFINE_SMB3_CONNECT_EVENT(connect_done);
+
+DECLARE_EVENT_CLASS(smb3_connect_err_class,
+	TP_PROTO(char *hostname, __u64 conn_id,
+		const struct __kernel_sockaddr_storage *dst_addr, int rc),
+	TP_ARGS(hostname, conn_id, dst_addr, rc),
+	TP_STRUCT__entry(
+		__string(hostname, hostname)
+		__field(__u64, conn_id)
+		__array(__u8, dst_addr, sizeof(struct sockaddr_storage))
+		__field(int, rc)
+	),
+	TP_fast_assign(
+		struct sockaddr_storage *pss = NULL;
+
+		__entry->conn_id = conn_id;
+		__entry->rc = rc;
+		pss = (struct sockaddr_storage *)__entry->dst_addr;
+		*pss = *dst_addr;
+		__assign_str(hostname, hostname);
+	),
+	TP_printk("rc=%d conn_id=0x%llx server=%s addr=%pISpsfc",
+		__entry->rc,
+		__entry->conn_id,
+		__get_str(hostname),
+		__entry->dst_addr)
+)
+
+#define DEFINE_SMB3_CONNECT_ERR_EVENT(name)        \
+DEFINE_EVENT(smb3_connect_err_class, smb3_##name,  \
+	TP_PROTO(char *hostname,		\
+		__u64 conn_id,			\
+		const struct __kernel_sockaddr_storage *addr,	\
+		int rc),			\
+	TP_ARGS(hostname, conn_id, addr, rc))
+
+DEFINE_SMB3_CONNECT_ERR_EVENT(connect_err);
 
 DECLARE_EVENT_CLASS(smb3_reconnect_class,
 	TP_PROTO(__u64	currmid,

fs/smbfs_common/smb2pdu.h

···
+/* SPDX-License-Identifier: LGPL-2.1 */
+#ifndef _COMMON_SMB2PDU_H
+#define _COMMON_SMB2PDU_H
+
+/*
+ * Note that, due to trying to use names similar to the protocol specifications,
+ * there are many mixed case field names in the structures below.  Although
+ * this does not match typical Linux kernel style, it is necessary to be
+ * able to match against the protocol specfication.
+ *
+ * SMB2 commands
+ * Some commands have minimal (wct=0,bcc=0), or uninteresting, responses
+ * (ie no useful data other than the SMB error code itself) and are marked such.
+ * Knowing this helps avoid response buffer allocations and copy in some cases.
+ */
+
+/* List of commands in host endian */
+#define SMB2_NEGOTIATE_HE	0x0000
+#define SMB2_SESSION_SETUP_HE	0x0001
+#define SMB2_LOGOFF_HE		0x0002 /* trivial request/resp */
+#define SMB2_TREE_CONNECT_HE	0x0003
+#define SMB2_TREE_DISCONNECT_HE	0x0004 /* trivial req/resp */
+#define SMB2_CREATE_HE		0x0005
+#define SMB2_CLOSE_HE		0x0006
+#define SMB2_FLUSH_HE		0x0007 /* trivial resp */
+#define SMB2_READ_HE		0x0008
+#define SMB2_WRITE_HE		0x0009
+#define SMB2_LOCK_HE		0x000A
+#define SMB2_IOCTL_HE		0x000B
+#define SMB2_CANCEL_HE		0x000C
+#define SMB2_ECHO_HE		0x000D
+#define SMB2_QUERY_DIRECTORY_HE	0x000E
+#define SMB2_CHANGE_NOTIFY_HE	0x000F
+#define SMB2_QUERY_INFO_HE	0x0010
+#define SMB2_SET_INFO_HE	0x0011
+#define SMB2_OPLOCK_BREAK_HE	0x0012
+
+/* The same list in little endian */
+#define SMB2_NEGOTIATE		cpu_to_le16(SMB2_NEGOTIATE_HE)
+#define SMB2_SESSION_SETUP	cpu_to_le16(SMB2_SESSION_SETUP_HE)
+#define SMB2_LOGOFF		cpu_to_le16(SMB2_LOGOFF_HE)
+#define SMB2_TREE_CONNECT	cpu_to_le16(SMB2_TREE_CONNECT_HE)
+#define SMB2_TREE_DISCONNECT	cpu_to_le16(SMB2_TREE_DISCONNECT_HE)
+#define SMB2_CREATE		cpu_to_le16(SMB2_CREATE_HE)
+#define SMB2_CLOSE		cpu_to_le16(SMB2_CLOSE_HE)
+#define SMB2_FLUSH		cpu_to_le16(SMB2_FLUSH_HE)
+#define SMB2_READ		cpu_to_le16(SMB2_READ_HE)
+#define SMB2_WRITE		cpu_to_le16(SMB2_WRITE_HE)
+#define SMB2_LOCK		cpu_to_le16(SMB2_LOCK_HE)
+#define SMB2_IOCTL		cpu_to_le16(SMB2_IOCTL_HE)
+#define SMB2_CANCEL		cpu_to_le16(SMB2_CANCEL_HE)
+#define SMB2_ECHO		cpu_to_le16(SMB2_ECHO_HE)
+#define SMB2_QUERY_DIRECTORY	cpu_to_le16(SMB2_QUERY_DIRECTORY_HE)
+#define SMB2_CHANGE_NOTIFY	cpu_to_le16(SMB2_CHANGE_NOTIFY_HE)
+#define SMB2_QUERY_INFO		cpu_to_le16(SMB2_QUERY_INFO_HE)
+#define SMB2_SET_INFO		cpu_to_le16(SMB2_SET_INFO_HE)
+#define SMB2_OPLOCK_BREAK	cpu_to_le16(SMB2_OPLOCK_BREAK_HE)
+
+#define SMB2_INTERNAL_CMD	cpu_to_le16(0xFFFF)
+
+#define NUMBER_OF_SMB2_COMMANDS	0x0013
+
+/*
+ * SMB2 Header Definition
+ *
+ * "MBZ" :  Must be Zero
+ * "BB"  :  BugBug, Something to check/review/analyze later
+ * "PDU" :  "Protocol Data Unit" (ie a network "frame")
+ *
+ */
+
+#define __SMB2_HEADER_STRUCTURE_SIZE	64
+#define SMB2_HEADER_STRUCTURE_SIZE				\
+	cpu_to_le16(__SMB2_HEADER_STRUCTURE_SIZE)
+
+#define SMB2_PROTO_NUMBER cpu_to_le32(0x424d53fe)
+#define SMB2_TRANSFORM_PROTO_NUM cpu_to_le32(0x424d53fd)
+#define SMB2_COMPRESSION_TRANSFORM_ID cpu_to_le32(0x424d53fc)
+
+/*
+ *	SMB2 flag definitions
+ */
+#define SMB2_FLAGS_SERVER_TO_REDIR	cpu_to_le32(0x00000001)
+#define SMB2_FLAGS_ASYNC_COMMAND	cpu_to_le32(0x00000002)
+#define SMB2_FLAGS_RELATED_OPERATIONS	cpu_to_le32(0x00000004)
+#define SMB2_FLAGS_SIGNED		cpu_to_le32(0x00000008)
+#define SMB2_FLAGS_PRIORITY_MASK	cpu_to_le32(0x00000070) /* SMB3.1.1 */
+#define SMB2_FLAGS_DFS_OPERATIONS	cpu_to_le32(0x10000000)
+#define SMB2_FLAGS_REPLAY_OPERATION	cpu_to_le32(0x20000000) /* SMB3 & up */
+
+/* See MS-SMB2 section 2.2.1 */
+struct smb2_hdr {
+	__le32 ProtocolId;	/* 0xFE 'S' 'M' 'B' */
+	__le16 StructureSize;	/* 64 */
+	__le16 CreditCharge;	/* MBZ */
+	__le32 Status;		/* Error from server */
+	__le16 Command;
+	__le16 CreditRequest;	/* CreditResponse */
+	__le32 Flags;
+	__le32 NextCommand;
+	__le64 MessageId;
+	union {
+		struct {
+			__le32 ProcessId;
+			__le32  TreeId;
+		} __packed SyncId;
+		__le64  AsyncId;
+	} __packed Id;
+	__le64  SessionId;
+	__u8   Signature[16];
+} __packed;
+
+struct smb2_pdu {
+	struct smb2_hdr hdr;
+	__le16 StructureSize2; /* size of wct area (varies, request specific) */
+} __packed;
+
+#define SMB3_AES_CCM_NONCE 11
+#define SMB3_AES_GCM_NONCE 12
+
+/* Transform flags (for 3.0 dialect this flag indicates CCM */
+#define TRANSFORM_FLAG_ENCRYPTED	0x0001
+struct smb2_transform_hdr {
+	__le32 ProtocolId;	/* 0xFD 'S' 'M' 'B' */
+	__u8   Signature[16];
+	__u8   Nonce[16];
+	__le32 OriginalMessageSize;
+	__u16  Reserved1;
+	__le16 Flags; /* EncryptionAlgorithm for 3.0, enc enabled for 3.1.1 */
+	__le64  SessionId;
+} __packed;
+
+
+/* See MS-SMB2 2.2.42 */
+struct smb2_compression_transform_hdr_unchained {
+	__le32 ProtocolId;	/* 0xFC 'S' 'M' 'B' */
+	__le32 OriginalCompressedSegmentSize;
+	__le16 CompressionAlgorithm;
+	__le16 Flags;
+	__le16 Length; /* if chained it is length, else offset */
+} __packed;
+
+/* See MS-SMB2 2.2.42.1 */
+#define SMB2_COMPRESSION_FLAG_NONE	0x0000
+#define SMB2_COMPRESSION_FLAG_CHAINED	0x0001
+
+struct compression_payload_header {
+	__le16	CompressionAlgorithm;
+	__le16	Flags;
+	__le32	Length; /* length of compressed playload including field below if present */
+	/* __le32 OriginalPayloadSize; */ /* optional, present when LZNT1, LZ77, LZ77+Huffman */
+} __packed;
+
+/* See MS-SMB2 2.2.42.2 */
+struct smb2_compression_transform_hdr_chained {
+	__le32 ProtocolId;	/* 0xFC 'S' 'M' 'B' */
+	__le32 OriginalCompressedSegmentSize;
+	/* struct compression_payload_header[] */
+} __packed;
+
+/* See MS-SMB2 2.2.42.2.2 */
+struct compression_pattern_payload_v1 {
+	__le16	Pattern;
+	__le16	Reserved1;
+	__le16	Reserved2;
+	__le32	Repetitions;
+} __packed;
+
+/* See MS-SMB2 section 2.2.9.2 */
+/* Context Types */
+#define SMB2_RESERVED_TREE_CONNECT_CONTEXT_ID 0x0000
+#define SMB2_REMOTED_IDENTITY_TREE_CONNECT_CONTEXT_ID cpu_to_le16(0x0001)
+
+struct tree_connect_contexts {
+	__le16 ContextType;
+	__le16 DataLength;
+	__le32 Reserved;
+	__u8   Data[];
+} __packed;
+
+/* Remoted identity tree connect context structures - see MS-SMB2 2.2.9.2.1 */
+struct smb3_blob_data {
+	__le16 BlobSize;
+	__u8   BlobData[];
+} __packed;
+
+/* Valid values for Attr */
+#define SE_GROUP_MANDATORY		0x00000001
+#define SE_GROUP_ENABLED_BY_DEFAULT	0x00000002
+#define SE_GROUP_ENABLED		0x00000004
+#define SE_GROUP_OWNER			0x00000008
+#define SE_GROUP_USE_FOR_DENY_ONLY	0x00000010
+#define SE_GROUP_INTEGRITY		0x00000020
+#define SE_GROUP_INTEGRITY_ENABLED	0x00000040
+#define SE_GROUP_RESOURCE		0x20000000
+#define SE_GROUP_LOGON_ID		0xC0000000
+
+/* struct sid_attr_data is SidData array in BlobData format then le32 Attr */
+
+struct sid_array_data {
+	__le16 SidAttrCount;
+	/* SidAttrList - array of sid_attr_data structs */
+} __packed;
+
+struct luid_attr_data {
+
+} __packed;
+
+/*
+ * struct privilege_data is the same as BLOB_DATA - see MS-SMB2 2.2.9.2.1.5
+ * but with size of LUID_ATTR_DATA struct and BlobData set to LUID_ATTR DATA
+ */
+
+struct privilege_array_data {
+	__le16 PrivilegeCount;
+	/* array of privilege_data structs */
+} __packed;
+
+struct remoted_identity_tcon_context {
+	__le16 TicketType; /* must be 0x0001 */
+	__le16 TicketSize; /* total size of this struct */
+	__le16 User; /* offset to SID_ATTR_DATA struct with user info */
+	__le16 UserName; /* offset to null terminated Unicode username string */
+	__le16 Domain; /* offset to null terminated Unicode domain name */
+	__le16 Groups; /* offset to SID_ARRAY_DATA struct with group info */
+	__le16 RestrictedGroups; /* similar to above */
+	__le16 Privileges; /* offset to PRIVILEGE_ARRAY_DATA struct */
+	__le16 PrimaryGroup; /* offset to SID_ARRAY_DATA struct */
+	__le16 Owner; /* offset to BLOB_DATA struct */
+	__le16 DefaultDacl; /* offset to BLOB_DATA struct */
+	__le16 DeviceGroups; /* offset to SID_ARRAY_DATA struct */
+	__le16 UserClaims; /* offset to BLOB_DATA struct */
+	__le16 DeviceClaims; /* offset to BLOB_DATA struct */
+	__u8   TicketInfo[]; /* variable length buf - remoted identity data */
+} __packed;
+
+struct smb2_tree_connect_req_extension {
+	__le32 TreeConnectContextOffset;
+	__le16 TreeConnectContextCount;
+	__u8  Reserved[10];
+	__u8  PathName[]; /* variable sized array */
+	/* followed by array of TreeConnectContexts */
+} __packed;
+
+/* Flags/Reserved for SMB3.1.1 */
+#define SMB2_TREE_CONNECT_FLAG_CLUSTER_RECONNECT cpu_to_le16(0x0001)
+#define SMB2_TREE_CONNECT_FLAG_REDIRECT_TO_OWNER cpu_to_le16(0x0002)
+#define SMB2_TREE_CONNECT_FLAG_EXTENSION_PRESENT cpu_to_le16(0x0004)
+
+struct smb2_tree_connect_req {
+	struct smb2_hdr hdr;
+	__le16 StructureSize;	/* Must be 9 */
+	__le16 Flags;		/* Flags in SMB3.1.1 */
+	__le16 PathOffset;
+	__le16 PathLength;
+	__u8   Buffer[1];	/* variable length */
+} __packed;
+
+/* Possible ShareType values */
+#define SMB2_SHARE_TYPE_DISK	0x01
+#define SMB2_SHARE_TYPE_PIPE	0x02
+#define	SMB2_SHARE_TYPE_PRINT	0x03
+
+/*
+ * Possible ShareFlags - exactly one and only one of the first 4 caching flags
+ * must be set (any of the remaining, SHI1005, flags may be set individually
+ * or in combination.
+ */
+#define SMB2_SHAREFLAG_MANUAL_CACHING			0x00000000
+#define SMB2_SHAREFLAG_AUTO_CACHING			0x00000010
+#define SMB2_SHAREFLAG_VDO_CACHING			0x00000020
+#define SMB2_SHAREFLAG_NO_CACHING			0x00000030
+#define SHI1005_FLAGS_DFS				0x00000001
+#define SHI1005_FLAGS_DFS_ROOT				0x00000002
+#define SHI1005_FLAGS_RESTRICT_EXCLUSIVE_OPENS		0x00000100
+#define SHI1005_FLAGS_FORCE_SHARED_DELETE		0x00000200
+#define SHI1005_FLAGS_ALLOW_NAMESPACE_CACHING		0x00000400
+#define SHI1005_FLAGS_ACCESS_BASED_DIRECTORY_ENUM	0x00000800
+#define SHI1005_FLAGS_FORCE_LEVELII_OPLOCK		0x00001000
+#define SHI1005_FLAGS_ENABLE_HASH_V1			0x00002000
+#define SHI1005_FLAGS_ENABLE_HASH_V2			0x00004000
+#define SHI1005_FLAGS_ENCRYPT_DATA			0x00008000
+#define SMB2_SHAREFLAG_IDENTITY_REMOTING		0x00040000 /* 3.1.1 */
+#define SMB2_SHAREFLAG_COMPRESS_DATA			0x00100000 /* 3.1.1 */
+#define SHI1005_FLAGS_ALL				0x0014FF33
+
+/* Possible share capabilities */
+#define SMB2_SHARE_CAP_DFS	cpu_to_le32(0x00000008) /* all dialects */
+#define SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY cpu_to_le32(0x00000010) /* 3.0 */
+#define SMB2_SHARE_CAP_SCALEOUT	cpu_to_le32(0x00000020) /* 3.0 */
+#define SMB2_SHARE_CAP_CLUSTER	cpu_to_le32(0x00000040) /* 3.0 */
+#define SMB2_SHARE_CAP_ASYMMETRIC cpu_to_le32(0x00000080) /* 3.02 */
+#define SMB2_SHARE_CAP_REDIRECT_TO_OWNER cpu_to_le32(0x00000100) /* 3.1.1 */
+
+struct smb2_tree_connect_rsp {
+	struct smb2_hdr hdr;
+	__le16 StructureSize;	/* Must be 16 */
+	__u8   ShareType;	/* see below */
+	__u8   Reserved;
+	__le32 ShareFlags;	/* see below */
+	__le32 Capabilities;	/* see below */
+	__le32 MaximalAccess;
+} __packed;
+
+struct smb2_tree_disconnect_req {
+	struct smb2_hdr hdr;
+	__le16 StructureSize;	/* Must be 4 */
+	__le16 Reserved;
+} __packed;
+
+struct smb2_tree_disconnect_rsp {
+	struct smb2_hdr hdr;
+	__le16 StructureSize;	/* Must be 4 */
+	__le16 Reserved;
+} __packed;
+
+
+/*
+ * SMB2_NEGOTIATE_PROTOCOL  See MS-SMB2 section 2.2.3
+ */
+/* SecurityMode flags */
+#define	SMB2_NEGOTIATE_SIGNING_ENABLED     0x0001
+#define	SMB2_NEGOTIATE_SIGNING_ENABLED_LE  cpu_to_le16(0x0001)
+#define SMB2_NEGOTIATE_SIGNING_REQUIRED	   0x0002
+#define SMB2_NEGOTIATE_SIGNING_REQUIRED_LE cpu_to_le16(0x0002)
+#define SMB2_SEC_MODE_FLAGS_ALL            0x0003
+
+/* Capabilities flags */
+#define SMB2_GLOBAL_CAP_DFS		0x00000001
+#define SMB2_GLOBAL_CAP_LEASING		0x00000002 /* Resp only New to SMB2.1 */
+#define SMB2_GLOBAL_CAP_LARGE_MTU	0X00000004 /* Resp only New to SMB2.1 */
+#define SMB2_GLOBAL_CAP_MULTI_CHANNEL	0x00000008 /* New to SMB3 */
+#define SMB2_GLOBAL_CAP_PERSISTENT_HANDLES 0x00000010 /* New to SMB3 */
+#define SMB2_GLOBAL_CAP_DIRECTORY_LEASING  0x00000020 /* New to SMB3 */
+#define SMB2_GLOBAL_CAP_ENCRYPTION	0x00000040 /* New to SMB3 */
+/* Internal types */
+#define SMB2_NT_FIND			0x00100000
+#define SMB2_LARGE_FILES		0x00200000
+
+#define SMB2_CLIENT_GUID_SIZE		16
+#define SMB2_CREATE_GUID_SIZE		16
+
+/* Dialects */
+#define SMB10_PROT_ID  0x0000 /* local only, not sent on wire w/CIFS negprot */
+#define SMB20_PROT_ID  0x0202
+#define SMB21_PROT_ID  0x0210
+#define SMB2X_PROT_ID  0x02FF
+#define SMB30_PROT_ID  0x0300
+#define SMB302_PROT_ID 0x0302
+#define SMB311_PROT_ID 0x0311
+#define BAD_PROT_ID    0xFFFF
+
+#define SMB311_SALT_SIZE			32
+/* Hash Algorithm Types */
+#define SMB2_PREAUTH_INTEGRITY_SHA512	cpu_to_le16(0x0001)
+#define SMB2_PREAUTH_HASH_SIZE 64
+
+/* Negotiate Contexts - ContextTypes. See MS-SMB2 section 2.2.3.1 for details */
+#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES	cpu_to_le16(1)
+#define SMB2_ENCRYPTION_CAPABILITIES		cpu_to_le16(2)
+#define SMB2_COMPRESSION_CAPABILITIES		cpu_to_le16(3)
+#define SMB2_NETNAME_NEGOTIATE_CONTEXT_ID	cpu_to_le16(5)
+#define SMB2_TRANSPORT_CAPABILITIES		cpu_to_le16(6)
+#define SMB2_RDMA_TRANSFORM_CAPABILITIES	cpu_to_le16(7)
+#define SMB2_SIGNING_CAPABILITIES		cpu_to_le16(8)
+#define SMB2_POSIX_EXTENSIONS_AVAILABLE		cpu_to_le16(0x100)
+
+struct smb2_neg_context {
+	__le16	ContextType;
+	__le16	DataLength;
+	__le32	Reserved;
+	/* Followed by array of data. NOTE: some servers require padding to 8 byte boundary */
+} __packed;
+
+/*
+ * SaltLength that the server send can be zero, so the only three required
+ * fields (all __le16) end up six bytes total, so the minimum context data len
+ * in the response is six bytes which accounts for
+ *
+ *      HashAlgorithmCount, SaltLength, and 1 HashAlgorithm.
+ */
+#define MIN_PREAUTH_CTXT_DATA_LEN 6
+
+struct smb2_preauth_neg_context {
+	__le16	ContextType; /* 1 */
+	__le16	DataLength;
+	__le32	Reserved;
+	__le16	HashAlgorithmCount; /* 1 */
+	__le16	SaltLength;
+	__le16	HashAlgorithms; /* HashAlgorithms[0] since only one defined */
+	__u8	Salt[SMB311_SALT_SIZE];
+} __packed;
+
+/* Encryption Algorithms Ciphers */
+#define SMB2_ENCRYPTION_AES128_CCM	cpu_to_le16(0x0001)
+#define SMB2_ENCRYPTION_AES128_GCM	cpu_to_le16(0x0002)
+#define SMB2_ENCRYPTION_AES256_CCM      cpu_to_le16(0x0003)
+#define SMB2_ENCRYPTION_AES256_GCM      cpu_to_le16(0x0004)
+
+/* Min encrypt context data is one cipher so 2 bytes + 2 byte count field */
+#define MIN_ENCRYPT_CTXT_DATA_LEN	4
+struct smb2_encryption_neg_context {
+	__le16	ContextType; /* 2 */
+	__le16	DataLength;
+	__le32	Reserved;
+	/* CipherCount usally 2, but can be 3 when AES256-GCM enabled */
+	__le16	CipherCount; /* AES128-GCM and AES128-CCM by default */
+	__le16	Ciphers[];
+} __packed;
+
+/* See MS-SMB2 2.2.3.1.3 */
+#define SMB3_COMPRESS_NONE	cpu_to_le16(0x0000)
+#define SMB3_COMPRESS_LZNT1	cpu_to_le16(0x0001)
+#define SMB3_COMPRESS_LZ77	cpu_to_le16(0x0002)
+#define SMB3_COMPRESS_LZ77_HUFF	cpu_to_le16(0x0003)
+/* Pattern scanning algorithm See MS-SMB2 3.1.4.4.1 */
+#define SMB3_COMPRESS_PATTERN	cpu_to_le16(0x0004) /* Pattern_V1 */
+
+/* Compression Flags */
+#define SMB2_COMPRESSION_CAPABILITIES_FLAG_NONE		cpu_to_le32(0x00000000)
+#define SMB2_COMPRESSION_CAPABILITIES_FLAG_CHAINED	cpu_to_le32(0x00000001)
+
+struct smb2_compression_capabilities_context {
+	__le16	ContextType; /* 3 */
+	__le16  DataLength;
+	__le32	Reserved;
+	__le16	CompressionAlgorithmCount;
+	__le16	Padding;
+	__le32	Flags;
+	__le16	CompressionAlgorithms[3];
+	__u16	Pad;  /* Some servers require pad to DataLen multiple of 8 */
+	/* Check if pad needed */
+} __packed;
+
+/*
+ * For smb2_netname_negotiate_context_id See MS-SMB2 2.2.3.1.4.
+ * Its struct simply contains NetName, an array of Unicode characters
+ */
+struct smb2_netname_neg_context {
+	__le16	ContextType; /* 5 */
+	__le16	DataLength;
+	__le32	Reserved;
+	__le16	NetName[]; /* hostname of target converted to UCS-2 */
+} __packed;
+
+/*
+ * For smb2_transport_capabilities context see MS-SMB2 2.2.3.1.5
+ * and 2.2.4.1.5
+ */
+
+/* Flags */
+#define SMB2_ACCEPT_TRANSFORM_LEVEL_SECURITY	0x00000001
+
+struct smb2_transport_capabilities_context {
+	__le16	ContextType; /* 6 */
+	__le16  DataLength;
+	__u32	Reserved;
+	__le32	Flags;
+	__u32	Pad;
+} __packed;
+
+/*
+ * For rdma transform capabilities context see MS-SMB2 2.2.3.1.6
+ * and 2.2.4.1.6
+ */
+
+/* RDMA Transform IDs */
+#define SMB2_RDMA_TRANSFORM_NONE	0x0000
+#define SMB2_RDMA_TRANSFORM_ENCRYPTION	0x0001
+#define SMB2_RDMA_TRANSFORM_SIGNING	0x0002
+
+struct smb2_rdma_transform_capabilities_context {
+	__le16	ContextType; /* 7 */
+	__le16  DataLength;
+	__u32	Reserved;
+	__le16	TransformCount;
+	__u16	Reserved1;
+	__u32	Reserved2;
+	__le16	RDMATransformIds[];
+} __packed;
+
+/*
+ * For signing capabilities context see MS-SMB2 2.2.3.1.7
+ * and 2.2.4.1.7
+ */
+
+/* Signing algorithms */
+#define SIGNING_ALG_HMAC_SHA256    0
+#define SIGNING_ALG_HMAC_SHA256_LE cpu_to_le16(0)
+#define SIGNING_ALG_AES_CMAC       1
+#define SIGNING_ALG_AES_CMAC_LE    cpu_to_le16(1)
+#define SIGNING_ALG_AES_GMAC       2
+#define SIGNING_ALG_AES_GMAC_LE    cpu_to_le16(2)
+
+struct smb2_signing_capabilities {
+	__le16	ContextType; /* 8 */
+	__le16	DataLength;
+	__le32	Reserved;
+	__le16	SigningAlgorithmCount;
+	__le16	SigningAlgorithms[];
+	/*  Followed by padding to 8 byte boundary (required by some servers) */
+} __packed;
+
+#define POSIX_CTXT_DATA_LEN	16
+struct smb2_posix_neg_context {
+	__le16	ContextType; /* 0x100 */
+	__le16	DataLength;
+	__le32	Reserved;
+	__u8	Name[16]; /* POSIX ctxt GUID 93AD25509CB411E7B42383DE968BCD7C */
+} __packed;
+
+struct smb2_negotiate_req {
+	struct smb2_hdr hdr;
+	__le16 StructureSize; /* Must be 36 */
+	__le16 DialectCount;
+	__le16 SecurityMode;
+	__le16 Reserved;	/* MBZ */
+	__le32 Capabilities;
+	__u8   ClientGUID[SMB2_CLIENT_GUID_SIZE];
+	/* In SMB3.02 and earlier next three were MBZ le64 ClientStartTime */
+	__le32 NegotiateContextOffset; /* SMB3.1.1 only. MBZ earlier */
+	__le16 NegotiateContextCount;  /* SMB3.1.1 only. MBZ earlier */
+	__le16 Reserved2;
+	__le16 Dialects[];
+} __packed;
+
+struct smb2_negotiate_rsp {
+	struct smb2_hdr hdr;
+	__le16 StructureSize;	/* Must be 65 */
+	__le16 SecurityMode;
+	__le16 DialectRevision;
+	__le16 NegotiateContextCount;	/* Prior to SMB3.1.1 was Reserved & MBZ */
+	__u8   ServerGUID[16];
+	__le32 Capabilities;
+	__le32 MaxTransactSize;
+	__le32 MaxReadSize;
+	__le32 MaxWriteSize;
+	__le64 SystemTime;	/* MBZ */
+	__le64 ServerStartTime;
+	__le16 SecurityBufferOffset;
+	__le16 SecurityBufferLength;
+	__le32 NegotiateContextOffset;	/* Pre:SMB3.1.1 was reserved/ignored */
+	__u8   Buffer[1];	/* variable length GSS security buffer */
+} __packed;
+
+
+/*
+ * SMB2_SESSION_SETUP  See MS-SMB2 section 2.2.5
+ */
+/* Flags */
+#define SMB2_SESSION_REQ_FLAG_BINDING		0x01
+#define SMB2_SESSION_REQ_FLAG_ENCRYPT_DATA	0x04
+
+struct smb2_sess_setup_req {
+	struct smb2_hdr hdr;
+	__le16 StructureSize; /* Must be 25 */
+	__u8   Flags;
+	__u8   SecurityMode;
+	__le32 Capabilities;
+	__le32 Channel;
+	__le16 SecurityBufferOffset;
+	__le16 SecurityBufferLength;
+	__le64 PreviousSessionId;
+	__u8   Buffer[1];	/* variable length GSS security buffer */
+} __packed;
+
+/* Currently defined SessionFlags */
+#define SMB2_SESSION_FLAG_IS_GUEST        0x0001
+#define SMB2_SESSION_FLAG_IS_GUEST_LE     cpu_to_le16(0x0001)
+#define SMB2_SESSION_FLAG_IS_NULL         0x0002
+#define SMB2_SESSION_FLAG_IS_NULL_LE      cpu_to_le16(0x0002)
+#define SMB2_SESSION_FLAG_ENCRYPT_DATA    0x0004
+#define SMB2_SESSION_FLAG_ENCRYPT_DATA_LE cpu_to_le16(0x0004)
+
+struct smb2_sess_setup_rsp {
+	struct smb2_hdr hdr;
+	__le16 StructureSize; /* Must be 9 */
+	__le16 SessionFlags;
+	__le16 SecurityBufferOffset;
+	__le16 SecurityBufferLength;
+	__u8   Buffer[1];	/* variable length GSS security buffer */
+} __packed;
+
+
+/*
+ * SMB2_LOGOFF  See MS-SMB2 section 2.2.7
+ */
+struct smb2_logoff_req {
+	struct smb2_hdr hdr;
+	__le16 StructureSize;	/* Must be 4 */
+	__le16 Reserved;
+} __packed;
+
+struct smb2_logoff_rsp {
+	struct smb2_hdr hdr;
+	__le16 StructureSize;	/* Must be 4 */
+	__le16 Reserved;
+} __packed;
+
+
+/*
+ * SMB2_CLOSE  See MS-SMB2 section 2.2.15
+ */
+/* Currently defined values for close flags */
+#define SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB	cpu_to_le16(0x0001)
+struct smb2_close_req {
+	struct smb2_hdr hdr;
+	__le16 StructureSize;	/* Must be 24 */
+	__le16 Flags;
+	__le32 Reserved;
+	__le64  PersistentFileId; /* opaque endianness */
+	__le64  VolatileFileId; /* opaque endianness */
+} __packed;
+
+/*
+ * Maximum size of a SMB2_CLOSE response is 64 (smb2 header) + 60 (data)
+ */
+#define MAX_SMB2_CLOSE_RESPONSE_SIZE 124
+
+struct smb2_close_rsp {
+	struct smb2_hdr hdr;
+	__le16 StructureSize; /* 60 */
+	__le16 Flags;
+	__le32 Reserved;
+	__le64 CreationTime;
+	__le64 LastAccessTime;
+	__le64 LastWriteTime;
+	__le64 ChangeTime;
+	__le64 AllocationSize;	/* Beginning of FILE_STANDARD_INFO equivalent */
+	__le64 EndOfFile;
+	__le32 Attributes;
+} __packed;
+
+
+/*
+ * SMB2_READ  See MS-SMB2 section 2.2.19
+ */
+/* For read request Flags field below, following flag is defined for SMB3.02 */
+#define SMB2_READFLAG_READ_UNBUFFERED	0x01
+#define SMB2_READFLAG_REQUEST_COMPRESSED 0x02 /* See MS-SMB2 2.2.19 */
+
+/* Channel field for read and write: exactly one of following flags can be set*/
+#define SMB2_CHANNEL_NONE               cpu_to_le32(0x00000000)
+#define SMB2_CHANNEL_RDMA_V1            cpu_to_le32(0x00000001)
+#define SMB2_CHANNEL_RDMA_V1_INVALIDATE cpu_to_le32(0x00000002)
+#define SMB2_CHANNEL_RDMA_TRANSFORM     cpu_to_le32(0x00000003)
+
+/* SMB2 read request without RFC1001 length at the beginning */
+struct smb2_read_req {
+	struct smb2_hdr hdr;
+	__le16 StructureSize; /* Must be 49 */
+	__u8   Padding; /* offset from start of SMB2 header to place read */
+	__u8   Flags; /* MBZ unless SMB3.02 or later */
+	__le32 Length;
+	__le64 Offset;
+	__le64  PersistentFileId;
+	__le64  VolatileFileId;
+	__le32 MinimumCount;
+	__le32 Channel; /* MBZ except for SMB3 or later */
+	__le32 RemainingBytes;
+	__le16 ReadChannelInfoOffset;
+	__le16 ReadChannelInfoLength;
+	__u8   Buffer[1];
+} __packed;
+
+/* Read flags */
+#define SMB2_READFLAG_RESPONSE_NONE            cpu_to_le32(0x00000000)
+#define SMB2_READFLAG_RESPONSE_RDMA_TRANSFORM  cpu_to_le32(0x00000001)
+
+struct smb2_read_rsp {
+	struct smb2_hdr hdr;
+	__le16 StructureSize; /* Must be 17 */
+	__u8   DataOffset;
+	__u8   Reserved;
+	__le32 DataLength;
+	__le32 DataRemaining;
+	__le32 Flags;
+	__u8   Buffer[1];
+} __packed;
+
+
+/*
+ * SMB2_WRITE  See MS-SMB2 section 2.2.21
+ */
+/* For write request Flags field below the following flags are defined: */
+#define SMB2_WRITEFLAG_WRITE_THROUGH	0x00000001	/* SMB2.1 or later */
+#define SMB2_WRITEFLAG_WRITE_UNBUFFERED	0x00000002	/* SMB3.02 or later */
+
+struct smb2_write_req {
+	struct smb2_hdr hdr;
+	__le16 StructureSize; /* Must be 49 */
+	__le16 DataOffset; /* offset from start of SMB2 header to write data */
+	__le32 Length;
+	__le64 Offset;
+	__le64  PersistentFileId; /* opaque endianness */
+	__le64  VolatileFileId; /* opaque endianness */
+	__le32 Channel; /* MBZ unless SMB3.02 or later */
+	__le32 RemainingBytes;
+	__le16 WriteChannelInfoOffset;
+	__le16 WriteChannelInfoLength;
+	__le32 Flags;
+	__u8   Buffer[1];
+} __packed;
+
+struct smb2_write_rsp {
+	struct smb2_hdr hdr;
+	__le16 StructureSize; /* Must be 17 */
+	__u8   DataOffset;
+	__u8   Reserved;
+	__le32 DataLength;
+	__le32 DataRemaining;
+	__u32  Reserved2;
+	__u8   Buffer[1];
+} __packed;
+
+
+/*
+ * SMB2_FLUSH  See MS-SMB2 section 2.2.17
+ */
+struct smb2_flush_req {
+	struct smb2_hdr hdr;
+	__le16 StructureSize;	/* Must be 24 */
+	__le16 Reserved1;
+	__le32 Reserved2;
+	__le64  PersistentFileId;
+	__le64  VolatileFileId;
+} __packed;
+
+struct smb2_flush_rsp {
+	struct smb2_hdr hdr;
+	__le16 StructureSize;
+	__le16 Reserved;
+} __packed;
+
+
+/*
+ * SMB2_NOTIFY  See MS-SMB2 section 2.2.35
+ */
+/* notify flags */
+#define SMB2_WATCH_TREE			0x0001
+
+/* notify completion filter flags. See MS-FSCC 2.6 and MS-SMB2 2.2.35 */
+#define FILE_NOTIFY_CHANGE_FILE_NAME		0x00000001
+#define FILE_NOTIFY_CHANGE_DIR_NAME		0x00000002
+#define FILE_NOTIFY_CHANGE_ATTRIBUTES		0x00000004
+#define FILE_NOTIFY_CHANGE_SIZE			0x00000008
+#define FILE_NOTIFY_CHANGE_LAST_WRITE		0x00000010
+#define FILE_NOTIFY_CHANGE_LAST_ACCESS		0x00000020
+#define FILE_NOTIFY_CHANGE_CREATION		0x00000040
+#define FILE_NOTIFY_CHANGE_EA			0x00000080
+#define FILE_NOTIFY_CHANGE_SECURITY		0x00000100
+#define FILE_NOTIFY_CHANGE_STREAM_NAME		0x00000200
+#define FILE_NOTIFY_CHANGE_STREAM_SIZE		0x00000400
+#define FILE_NOTIFY_CHANGE_STREAM_WRITE		0x00000800
+
+/* SMB2 Notify Action Flags */
+#define FILE_ACTION_ADDED                       0x00000001
+#define FILE_ACTION_REMOVED                     0x00000002
+#define FILE_ACTION_MODIFIED                    0x00000003
+#define FILE_ACTION_RENAMED_OLD_NAME            0x00000004
+#define FILE_ACTION_RENAMED_NEW_NAME            0x00000005
+#define FILE_ACTION_ADDED_STREAM                0x00000006
+#define FILE_ACTION_REMOVED_STREAM              0x00000007
+#define FILE_ACTION_MODIFIED_STREAM             0x00000008
+#define FILE_ACTION_REMOVED_BY_DELETE           0x00000009
+
+struct smb2_change_notify_req {
+	struct smb2_hdr hdr;
+	__le16	StructureSize;
+	__le16	Flags;
+	__le32	OutputBufferLength;
+	__le64	PersistentFileId; /* opaque endianness */
+	__le64	VolatileFileId; /* opaque endianness */
+	__le32	CompletionFilter;
+	__u32	Reserved;
+} __packed;
+
+struct smb2_change_notify_rsp {
+	struct smb2_hdr hdr;
+	__le16	StructureSize;  /* Must be 9 */
+	__le16	OutputBufferOffset;
+	__le32	OutputBufferLength;
+	__u8	Buffer[1]; /* array of file notify structs */
+} __packed;
+
+
+/*
+ * SMB2_CREATE  See MS-SMB2 section 2.2.13
+ */
+/* Oplock levels */
+#define SMB2_OPLOCK_LEVEL_NONE		0x00
+#define SMB2_OPLOCK_LEVEL_II		0x01
+#define SMB2_OPLOCK_LEVEL_EXCLUSIVE	0x08
+#define SMB2_OPLOCK_LEVEL_BATCH		0x09
+#define SMB2_OPLOCK_LEVEL_LEASE		0xFF
+/* Non-spec internal type */
+#define SMB2_OPLOCK_LEVEL_NOCHANGE	0x99
+
+/* Impersonation Levels. See MS-WPO section 9.7 and MSDN-IMPERS */
+#define IL_ANONYMOUS		cpu_to_le32(0x00000000)
+#define IL_IDENTIFICATION	cpu_to_le32(0x00000001)
+#define IL_IMPERSONATION	cpu_to_le32(0x00000002)
+#define IL_DELEGATE		cpu_to_le32(0x00000003)
+
+/* File Attrubutes */
+#define FILE_ATTRIBUTE_READONLY			0x00000001
+#define FILE_ATTRIBUTE_HIDDEN			0x00000002
+#define FILE_ATTRIBUTE_SYSTEM			0x00000004
+#define FILE_ATTRIBUTE_DIRECTORY		0x00000010
+#define FILE_ATTRIBUTE_ARCHIVE			0x00000020
+#define FILE_ATTRIBUTE_NORMAL			0x00000080
+#define FILE_ATTRIBUTE_TEMPORARY		0x00000100
+#define FILE_ATTRIBUTE_SPARSE_FILE		0x00000200
+#define FILE_ATTRIBUTE_REPARSE_POINT		0x00000400
+#define FILE_ATTRIBUTE_COMPRESSED		0x00000800
+#define FILE_ATTRIBUTE_OFFLINE			0x00001000
+#define FILE_ATTRIBUTE_NOT_CONTENT_INDEXED	0x00002000
+#define FILE_ATTRIBUTE_ENCRYPTED		0x00004000
+#define FILE_ATTRIBUTE_INTEGRITY_STREAM		0x00008000
+#define FILE_ATTRIBUTE_NO_SCRUB_DATA		0x00020000
+#define FILE_ATTRIBUTE__MASK			0x00007FB7
+
+#define FILE_ATTRIBUTE_READONLY_LE              cpu_to_le32(0x00000001)
+#define FILE_ATTRIBUTE_HIDDEN_LE		cpu_to_le32(0x00000002)
+#define FILE_ATTRIBUTE_SYSTEM_LE		cpu_to_le32(0x00000004)
+#define FILE_ATTRIBUTE_DIRECTORY_LE		cpu_to_le32(0x00000010)
+#define FILE_ATTRIBUTE_ARCHIVE_LE		cpu_to_le32(0x00000020)
+#define FILE_ATTRIBUTE_NORMAL_LE		cpu_to_le32(0x00000080)
+#define FILE_ATTRIBUTE_TEMPORARY_LE		cpu_to_le32(0x00000100)
+#define FILE_ATTRIBUTE_SPARSE_FILE_LE		cpu_to_le32(0x00000200)
+#define FILE_ATTRIBUTE_REPARSE_POINT_LE		cpu_to_le32(0x00000400)
+#define FILE_ATTRIBUTE_COMPRESSED_LE		cpu_to_le32(0x00000800)
+#define FILE_ATTRIBUTE_OFFLINE_LE		cpu_to_le32(0x00001000)
+#define FILE_ATTRIBUTE_NOT_CONTENT_INDEXED_LE	cpu_to_le32(0x00002000)
+#define FILE_ATTRIBUTE_ENCRYPTED_LE		cpu_to_le32(0x00004000)
+#define FILE_ATTRIBUTE_INTEGRITY_STREAM_LE	cpu_to_le32(0x00008000)
+#define FILE_ATTRIBUTE_NO_SCRUB_DATA_LE		cpu_to_le32(0x00020000)
+#define FILE_ATTRIBUTE_MASK_LE			cpu_to_le32(0x00007FB7)
+
+/* Desired Access Flags */
+#define FILE_READ_DATA_LE		cpu_to_le32(0x00000001)
+#define FILE_LIST_DIRECTORY_LE		cpu_to_le32(0x00000001)
+#define FILE_WRITE_DATA_LE		cpu_to_le32(0x00000002)
+#define FILE_APPEND_DATA_LE		cpu_to_le32(0x00000004)
+#define FILE_ADD_SUBDIRECTORY_LE	cpu_to_le32(0x00000004)
+#define FILE_READ_EA_LE			cpu_to_le32(0x00000008)
+#define FILE_WRITE_EA_LE		cpu_to_le32(0x00000010)
+#define FILE_EXECUTE_LE			cpu_to_le32(0x00000020)
+#define FILE_DELETE_CHILD_LE		cpu_to_le32(0x00000040)
+#define FILE_READ_ATTRIBUTES_LE		cpu_to_le32(0x00000080)
+#define FILE_WRITE_ATTRIBUTES_LE	cpu_to_le32(0x00000100)
+#define FILE_DELETE_LE			cpu_to_le32(0x00010000)
+#define FILE_READ_CONTROL_LE		cpu_to_le32(0x00020000)
+#define FILE_WRITE_DAC_LE		cpu_to_le32(0x00040000)
+#define FILE_WRITE_OWNER_LE		cpu_to_le32(0x00080000)
+#define FILE_SYNCHRONIZE_LE		cpu_to_le32(0x00100000)
+#define FILE_ACCESS_SYSTEM_SECURITY_LE	cpu_to_le32(0x01000000)
+#define FILE_MAXIMAL_ACCESS_LE		cpu_to_le32(0x02000000)
+#define FILE_GENERIC_ALL_LE		cpu_to_le32(0x10000000)
+#define FILE_GENERIC_EXECUTE_LE		cpu_to_le32(0x20000000)
+#define FILE_GENERIC_WRITE_LE		cpu_to_le32(0x40000000)
+#define FILE_GENERIC_READ_LE		cpu_to_le32(0x80000000)
+#define DESIRED_ACCESS_MASK             cpu_to_le32(0xF21F01FF)
+
+
+#define FILE_READ_DESIRED_ACCESS_LE     (FILE_READ_DATA_LE        |	\
+					 FILE_READ_EA_LE          |     \
+					 FILE_GENERIC_READ_LE)
+#define FILE_WRITE_DESIRE_ACCESS_LE     (FILE_WRITE_DATA_LE       |	\
+					 FILE_APPEND_DATA_LE      |	\
+					 FILE_WRITE_EA_LE         |	\
+					 FILE_WRITE_ATTRIBUTES_LE |	\
+					 FILE_GENERIC_WRITE_LE)
+
+/* ShareAccess Flags */
+#define FILE_SHARE_READ_LE		cpu_to_le32(0x00000001)
+#define FILE_SHARE_WRITE_LE		cpu_to_le32(0x00000002)
+#define FILE_SHARE_DELETE_LE		cpu_to_le32(0x00000004)
+#define FILE_SHARE_ALL_LE		cpu_to_le32(0x00000007)
+
+/* CreateDisposition Flags */
+#define FILE_SUPERSEDE_LE		cpu_to_le32(0x00000000)
+#define FILE_OPEN_LE			cpu_to_le32(0x00000001)
+#define FILE_CREATE_LE			cpu_to_le32(0x00000002)
+#define	FILE_OPEN_IF_LE			cpu_to_le32(0x00000003)
+#define FILE_OVERWRITE_LE		cpu_to_le32(0x00000004)
+#define FILE_OVERWRITE_IF_LE		cpu_to_le32(0x00000005)
+#define FILE_CREATE_MASK_LE             cpu_to_le32(0x00000007)
+
+#define FILE_READ_RIGHTS (FILE_READ_DATA | FILE_READ_EA \
+			| FILE_READ_ATTRIBUTES)
+#define FILE_WRITE_RIGHTS (FILE_WRITE_DATA | FILE_APPEND_DATA \
+			| FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES)
+#define FILE_EXEC_RIGHTS (FILE_EXECUTE)
+
+/* CreateOptions Flags */
+#define FILE_DIRECTORY_FILE_LE		cpu_to_le32(0x00000001)
+/* same as #define CREATE_NOT_FILE_LE	cpu_to_le32(0x00000001) */
+#define FILE_WRITE_THROUGH_LE		cpu_to_le32(0x00000002)
+#define FILE_SEQUENTIAL_ONLY_LE		cpu_to_le32(0x00000004)
+#define FILE_NO_INTERMEDIATE_BUFFERING_LE cpu_to_le32(0x00000008)
+#define FILE_NON_DIRECTORY_FILE_LE	cpu_to_le32(0x00000040)
+#define FILE_COMPLETE_IF_OPLOCKED_LE	cpu_to_le32(0x00000100)
+#define FILE_NO_EA_KNOWLEDGE_LE		cpu_to_le32(0x00000200)
+#define FILE_RANDOM_ACCESS_LE		cpu_to_le32(0x00000800)
+#define FILE_DELETE_ON_CLOSE_LE		cpu_to_le32(0x00001000)
+#define FILE_OPEN_BY_FILE_ID_LE		cpu_to_le32(0x00002000)
+#define FILE_OPEN_FOR_BACKUP_INTENT_LE	cpu_to_le32(0x00004000)
+#define FILE_NO_COMPRESSION_LE		cpu_to_le32(0x00008000)
+#define FILE_OPEN_REPARSE_POINT_LE	cpu_to_le32(0x00200000)
+#define FILE_OPEN_NO_RECALL_LE		cpu_to_le32(0x00400000)
+#define CREATE_OPTIONS_MASK_LE          cpu_to_le32(0x00FFFFFF)
+
+#define FILE_READ_RIGHTS_LE (FILE_READ_DATA_LE | FILE_READ_EA_LE \
+			| FILE_READ_ATTRIBUTES_LE)
+#define FILE_WRITE_RIGHTS_LE (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE \
+			| FILE_WRITE_EA_LE | FILE_WRITE_ATTRIBUTES_LE)
+#define FILE_EXEC_RIGHTS_LE (FILE_EXECUTE_LE)
+
+/* Create Context Values */
+#define SMB2_CREATE_EA_BUFFER			"ExtA" /* extended attributes */
+#define SMB2_CREATE_SD_BUFFER			"SecD" /* security descriptor */
+#define SMB2_CREATE_DURABLE_HANDLE_REQUEST	"DHnQ"
+#define SMB2_CREATE_DURABLE_HANDLE_RECONNECT	"DHnC"
+#define SMB2_CREATE_ALLOCATION_SIZE		"AISi"
+#define SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST "MxAc"
+#define SMB2_CREATE_TIMEWARP_REQUEST		"TWrp"
+#define SMB2_CREATE_QUERY_ON_DISK_ID		"QFid"
+#define SMB2_CREATE_REQUEST_LEASE		"RqLs"
+#define SMB2_CREATE_DURABLE_HANDLE_REQUEST_V2	"DH2Q"
+#define SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2	"DH2C"
+#define SMB2_CREATE_TAG_POSIX          "\x93\xAD\x25\x50\x9C\xB4\x11\xE7\xB4\x23\x83\xDE\x96\x8B\xCD\x7C"
+
+/* Flag (SMB3 open response) values */
+#define SMB2_CREATE_FLAG_REPARSEPOINT 0x01
+
+struct create_context {
+	__le32 Next;
+	__le16 NameOffset;
+	__le16 NameLength;
+	__le16 Reserved;
+	__le16 DataOffset;
+	__le32 DataLength;
+	__u8 Buffer[];
+} __packed;
+
+struct smb2_create_req {
+	struct smb2_hdr hdr;
+	__le16 StructureSize;	/* Must be 57 */
+	__u8   SecurityFlags;
+	__u8   RequestedOplockLevel;
+	__le32 ImpersonationLevel;
+	__le64 SmbCreateFlags;
+	__le64 Reserved;
+	__le32 DesiredAccess;
+	__le32 FileAttributes;
+	__le32 ShareAccess;
+	__le32 CreateDisposition;
+	__le32 CreateOptions;
+	__le16 NameOffset;
+	__le16 NameLength;
+	__le32 CreateContextsOffset;
+	__le32 CreateContextsLength;
+	__u8   Buffer[];
+} __packed;
+
+struct smb2_create_rsp {
+	struct smb2_hdr hdr;
+	__le16 StructureSize;	/* Must be 89 */
+	__u8   OplockLevel;
+	__u8   Flags;  /* 0x01 if reparse point */
+	__le32 CreateAction;
+	__le64 CreationTime;
+	__le64 LastAccessTime;
+	__le64 LastWriteTime;
+	__le64 ChangeTime;
+	__le64 AllocationSize;
+	__le64 EndofFile;
+	__le32 FileAttributes;
+	__le32 Reserved2;
+	__le64  PersistentFileId;
+	__le64  VolatileFileId;
+	__le32 CreateContextsOffset;
+	__le32 CreateContextsLength;
+	__u8   Buffer[1];
+} __packed;
+
+
+#endif				/* _COMMON_SMB2PDU_H */