[CIFS] Fix sign mount option and sign proc config setting

We were checking the wrong (old) global variable to determine
whether to override server and force signing on the SMB
connection.

Acked-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index ebd13358cca6bb840b6c62078a60a61c7ed9c0c6..42fafa144f40520949093e138d2d19199e392668 100644 (file)
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -901,90 +901,14 @@ security_flags_write(struct file *file, const char __user *buffer,
        }
        /* flags look ok - update the global security flags for cifs module */
        extended_security = flags;
+       if (extended_security & CIFSSEC_MUST_SIGN) {
+               /* requiring signing implies signing is allowed */
+               extended_security |= CIFSSEC_MAY_SIGN;
+               cFYI(1, ("packet signing now required"));
+       } else if ((extended_security & CIFSSEC_MAY_SIGN) == 0) {
+               cFYI(1, ("packet signing disabled"));
+       }
+       /* BB should we turn on MAY flags for other MUST options? */
        return count;
 }
-
-/* static int
-ntlmv2_enabled_read(char *page, char **start, off_t off,
-                      int count, int *eof, void *data)
-{
-       int len;
-
-       len = sprintf(page, "%d\n", ntlmv2_support);
-
-       len -= off;
-       *start = page + off;
-
-       if (len > count)
-               len = count;
-       else
-               *eof = 1;
-
-       if (len < 0)
-               len = 0;
-
-       return len;
-}
-static int
-ntlmv2_enabled_write(struct file *file, const char __user *buffer,
-                       unsigned long count, void *data)
-{
-       char c;
-       int rc;
-
-       rc = get_user(c, buffer);
-       if (rc)
-               return rc;
-       if (c == '0' || c == 'n' || c == 'N')
-               ntlmv2_support = 0;
-       else if (c == '1' || c == 'y' || c == 'Y')
-               ntlmv2_support = 1;
-       else if (c == '2')
-               ntlmv2_support = 2;
-
-       return count;
-}
-
-static int
-packet_signing_enabled_read(char *page, char **start, off_t off,
-                      int count, int *eof, void *data)
-{
-       int len;
-
-       len = sprintf(page, "%d\n", sign_CIFS_PDUs);
-
-       len -= off;
-       *start = page + off;
-
-       if (len > count)
-               len = count;
-       else
-               *eof = 1;
-
-       if (len < 0)
-               len = 0;
-
-       return len;
-}
-static int
-packet_signing_enabled_write(struct file *file, const char __user *buffer,
-                       unsigned long count, void *data)
-{
-       char c;
-       int rc;
-
-       rc = get_user(c, buffer);
-       if (rc)
-               return rc;
-       if (c == '0' || c == 'n' || c == 'N')
-               sign_CIFS_PDUs = 0;
-       else if (c == '1' || c == 'y' || c == 'Y')
-               sign_CIFS_PDUs = 1;
-       else if (c == '2')
-               sign_CIFS_PDUs = 2;
-
-       return count;
-} */
-
-
 #endif

diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 57419a176688356cec33d80e2c89d22b13d0fedc..4a2458e787847967d8f046173be9c21e0daf24ef 100644 (file)
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -426,11 +426,11 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
 
        /* if any of auth flags (ie not sign or seal) are overriden use them */
        if(ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
-               secFlags = ses->overrideSecFlg;
+               secFlags = ses->overrideSecFlg;  /* BB FIXME fix sign flags? */
        else /* if override flags set only sign/seal OR them with global auth */
                secFlags = extended_security | ses->overrideSecFlg;
 
-       cFYI(1,("secFlags 0x%x",secFlags));
+       cFYI(1, ("secFlags 0x%x", secFlags));
 
        pSMB->hdr.Mid = GetNextMid(server);
        pSMB->hdr.Flags2 |= (SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS);
@@ -633,22 +633,32 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 signing_check:
 #endif
-       if(sign_CIFS_PDUs == FALSE) {        
+       if ((secFlags & CIFSSEC_MAY_SIGN) == 0) {
+               /* MUST_SIGN already includes the MAY_SIGN FLAG
+                  so if this is zero it means that signing is disabled */
+               cFYI(1, ("Signing disabled"));
                if(server->secMode & SECMODE_SIGN_REQUIRED)
-                       cERROR(1,("Server requires "
-                                "/proc/fs/cifs/PacketSigningEnabled to be on"));
+                       cERROR(1, ("Server requires "
+                                  "/proc/fs/cifs/PacketSigningEnabled "
+                                  "to be on"));
                server->secMode &= 
                        ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
-       } else if(sign_CIFS_PDUs == 1) {
+       } else if ((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) {
+               /* signing required */
+               cFYI(1, ("Must sign - segFlags 0x%x", secFlags));
+               if ((server->secMode &
+                       (SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED)) == 0) {
+                       cERROR(1,
+                               ("signing required but server lacks support"));
+               } else
+                       server->secMode |= SECMODE_SIGN_REQUIRED;
+       } else {
+               /* signing optional ie CIFSSEC_MAY_SIGN */
                if((server->secMode & SECMODE_SIGN_REQUIRED) == 0)
                        server->secMode &= 
                                ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
-       } else if(sign_CIFS_PDUs == 2) {
-               if((server->secMode & 
-                       (SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED)) == 0) {
-                       cERROR(1,("signing required but server lacks support"));
-               }
        }
+       
 neg_err_exit:  
        cifs_buf_release(pSMB);