Turns out it is easy to negotiate SMB2.2 against Windows 8 (rather
than just 2.1 or 2.0 as Pavel's current git tree does). Basic
operations worked fine. SMB2.2 is a very cool protocol, but since
most features are optional, upgrading to SMB2.2 is not bad. For
example this change to Pavel's git tree is trivial:
diff -U 4 fs/smb2/smb2pdu.c fs/cifs/smb2pdu.c
--- fs/smb2/smb2pdu.c 2012-03-01 18:30:24.986486510 -0600
+++ fs/cifs/smb2pdu.c 2012-03-01 18:33:35.066765305 -0600
@@ -357,20 +357,22 @@
else if (resp_buftype == CIFS_LARGE_BUFFER)
cifs_buf_release(pSMB2r);
}
-#define SMB2_NUM_PROT 2
+#define SMB2_NUM_PROT 3
#define SMB2_PROT 0
#define SMB21_PROT 1
+#define SMB22_PROT 2
#define BAD_PROT 0xFFFF
static struct {
int index;
__le16 name;
} smb2protocols[] = {
{SMB2_PROT, cpu_to_le16(SMB2_PROT_ID)},
{SMB21_PROT, cpu_to_le16(SMB21_PROT_ID)},
+ {SMB22_PROT, cpu_to_le16(SMB22_PROT_ID)},
{BAD_PROT, cpu_to_le16(BAD_PROT_ID)}
};
/*
@@ -464,9 +466,11 @@
}
cFYI(1, "mode 0x%x", pSMB2r->SecurityMode);
- if (pSMB2r->DialectRevision == smb2protocols[SMB21_PROT].name)
+ if (pSMB2r->DialectRevision == smb2protocols[SMB22_PROT].name)
+ cFYI(1, "negotiated smb2.2 dialect");
+ else if (pSMB2r->DialectRevision == smb2protocols[SMB21_PROT].name)
cFYI(1, "negotiated smb2.1 dialect");
else if (pSMB2r->DialectRevision == smb2protocols[SMB2_PROT].name)
cFYI(1, "negotiated smb2 dialect");
else {
diff -U 4 fs/smb2/smb2pdu.h fs/cifs/smb2pdu.h
--- fs/smb2/smb2pdu.h 2012-03-01 18:30:24.986486510 -0600
+++ fs/cifs/smb2pdu.h 2012-03-01 18:32:11.896643315 -0600
@@ -38,8 +38,10 @@
*/
#define SMB2_PROT_ID 0x0202
#define SMB21_PROT_ID 0x0210
+#define SMB22_PROT_ID 0x0224
+
#define BAD_PROT_ID 0xFFFF
/* List is sent on wire as little endian */
#define SMB2_NEGOTIATE cpu_to_le16(0x0000)
--
Thanks,
Steve
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