xiaomi-sm8450/android_kernel_xiaomi_sm8450
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[CIFS] Fix SMB2 negotiation support to select only one dialect (based on vers=)

Pārlūkot izejas kodu 
Based on whether the user (on mount command) chooses:

vers=3.0 (for smb3.0 support)
vers=2.1 (for smb2.1 support)
or (with subsequent patch, which will allow SMB2 support)
vers=2.0 (for original smb2.02 dialect support)

send only one dialect at a time during negotiate (we
had been sending a list).

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Šī revīzija ir iekļauta:
Steve French
2012-10-01 12:26:22 -05:00
vecāks c052e2b423
revīzija e4aa25e780
5 mainīti faili ar 56 papildinājumiem un 29 dzēšanām
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40
fs/cifs/smb2pdu.c
Parādīt failu

@@ -1,7 +1,7 @@
/*
* fs/cifs/smb2pdu.c
*
* Copyright (C) International Business Machines Corp., 2009, 2011
* Copyright (C) International Business Machines Corp., 2009, 2012
* Etersoft, 2012
* Author(s): Steve French (sfrench@us.ibm.com)
* Pavel Shilovsky (pshilovsky@samba.org) 2012
@@ -304,24 +304,6 @@ free_rsp_buf(int resp_buftype, void *rsp)
cifs_buf_release(rsp);
}
#define SMB2_NUM_PROT 2
#define SMB2_PROT 0
#define SMB21_PROT 1
#define BAD_PROT 0xFFFF
#define SMB2_PROT_ID 0x0202
#define SMB21_PROT_ID 0x0210
#define BAD_PROT_ID 0xFFFF
static struct {
int index;
__le16 name;
} smb2protocols[] = {
{SMB2_PROT, cpu_to_le16(SMB2_PROT_ID)},
{SMB21_PROT, cpu_to_le16(SMB21_PROT_ID)},
{BAD_PROT, cpu_to_le16(BAD_PROT_ID)}
};
/*
*
@@ -348,7 +330,6 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
int resp_buftype;
struct TCP_Server_Info *server;
unsigned int sec_flags;
u16 i;
u16 temp = 0;
int blob_offset, blob_length;
char *security_blob;
@@ -377,11 +358,10 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
req->hdr.SessionId = 0;
for (i = 0; i < SMB2_NUM_PROT; i++)
req->Dialects[i] = smb2protocols[i].name;
req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
req->DialectCount = cpu_to_le16(i);
inc_rfc1001_len(req, i * 2);
req->DialectCount = cpu_to_le16(1); /* One vers= at a time for now */
inc_rfc1001_len(req, 2);
/* only one of SMB2 signing flags may be set in SMB2 request */
if ((sec_flags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN)
@@ -391,7 +371,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
req->SecurityMode = cpu_to_le16(temp);
req->Capabilities = cpu_to_le32(SMB2_GLOBAL_CAP_DFS);
req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);
memcpy(req->ClientGUID, cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
@@ -411,10 +391,14 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
cFYI(1, "mode 0x%x", rsp->SecurityMode);
if (rsp->DialectRevision == smb2protocols[SMB21_PROT].name)
/* BB we may eventually want to match the negotiated vs. requested
dialect, even though we are only requesting one at a time */
if (rsp->DialectRevision == cpu_to_le16(SMB20_PROT_ID))
cFYI(1, "negotiated smb2.0 dialect");
else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID))
cFYI(1, "negotiated smb2.1 dialect");
else if (rsp->DialectRevision == smb2protocols[SMB2_PROT].name)
cFYI(1, "negotiated smb2 dialect");
else if (rsp->DialectRevision == cpu_to_le16(SMB30_PROT_ID))
cFYI(1, "negotiated smb3.0 dialect");
else {
cERROR(1, "Illegal dialect returned by server %d",
le16_to_cpu(rsp->DialectRevision));