6 files changed, 32 insertions, 20 deletions

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index ca53720fa5b1..d6d226addde2 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -199,10 +199,12 @@ cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
     /* Only need to call the old QFSInfo if failed
     on newer one */
     if(rc)
-        rc = CIFSSMBQFSInfo(xid, pTcon, buf);
+        if((pTcon->ses->flags & CIFS_SES_LANMAN) == 0)
+                rc = CIFSSMBQFSInfo(xid, pTcon, buf); /* not supported by OS2 */
 
-        /* Old Windows servers do not support level 103, retry with level 
-           one if old server failed the previous call */ 
+        /* Some old Windows servers also do not support level 103, retry with
+           older level one if old server failed the previous call or we
+           bypassed it because we detected that this was an older LANMAN sess */
         if(rc)
                 rc = SMBOldQFSInfo(xid, pTcon, buf);
         /*     
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 98eb5446e8c1..597afdf4c69c 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -203,9 +203,14 @@ struct cifsSesInfo {
         char * domainName;
         char * password;
 };
-/* session flags */
+/* no more than one of the following three session flags may be set */
 #define CIFS_SES_NT4 1
-
+#define CIFS_SES_OS2 2
+#define CIFS_SES_W9X 4
+/* following flag is set for old servers such as OS2 (and Win95?)
+   which do not negotiate NTLM or POSIX dialects, but instead
+   negotiate one of the older LANMAN dialects */
+#define CIFS_SES_LANMAN 8
 /*
  * there is one of these for each connection to a resource on a particular
  * session 
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index e5dd8708d636..50505422dbb4 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -26,7 +26,8 @@
 
 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 #define LANMAN_PROT 0
-#define CIFS_PROT   1
+#define LANMAN2_PROT 1
+#define CIFS_PROT   2
 #else
 #define CIFS_PROT   0
 #endif
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 6e004587fa48..f2fa05bbcb47 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -46,6 +46,7 @@ static struct {
 } protocols[] = {
 #ifdef CONFIG_CIFS_WEAK_PW_HASH
         {LANMAN_PROT, "\2LM1.2X002"},
+        {LANMAN2_PROT, "\2LANMAN2.1"},
 #endif /* weak password hashing for legacy clients */
         {CIFS_PROT, "\2NT LM 0.12"}, 
         {POSIX_PROT, "\2POSIX 2"},
@@ -67,13 +68,13 @@ static struct {
 /* define the number of elements in the cifs dialect array */
 #ifdef CONFIG_CIFS_POSIX
 #ifdef CONFIG_CIFS_WEAK_PW_HASH
-#define CIFS_NUM_PROT 3
+#define CIFS_NUM_PROT 4
 #else
 #define CIFS_NUM_PROT 2
 #endif /* CIFS_WEAK_PW_HASH */
 #else /* not posix */
 #ifdef CONFIG_CIFS_WEAK_PW_HASH
-#define CIFS_NUM_PROT 2
+#define CIFS_NUM_PROT 3
 #else
 #define CIFS_NUM_PROT 1
 #endif /* CONFIG_CIFS_WEAK_PW_HASH */
@@ -446,7 +447,8 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
                 goto neg_err_exit;
 #ifdef CONFIG_CIFS_WEAK_PW_HASH 
         } else if((pSMBr->hdr.WordCount == 13)
-                        && (pSMBr->DialectIndex == LANMAN_PROT)) {
+                        && ((pSMBr->DialectIndex == LANMAN_PROT)
+                                || (pSMBr->DialectIndex == LANMAN2_PROT))) {
                 int tmp, adjust;
                 struct lanman_neg_rsp * rsp = (struct lanman_neg_rsp *)pSMBr;
 
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 083b2b2c1571..c96f3edf1b9c 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3316,6 +3316,7 @@ int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
                 first_time = 1;
         }
         if (!rc) {
+                pSesInfo->flags = 0;
                 pSesInfo->capabilities = pSesInfo->server->capabilities;
                 if(linuxExtEnabled == 0)
                         pSesInfo->capabilities &= (~CAP_UNIX);
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index d1705ab8136e..e4c4e466e320 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -268,6 +268,10 @@ static int decode_ascii_ssetup(char ** pbcc_area, int bleft, struct cifsSesInfo
         ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
         if(ses->serverOS)
                 strncpy(ses->serverOS, bcc_ptr, len);
+        if(strncmp(ses->serverOS, "OS/2",4) == 0) {
+                        cFYI(1,("OS/2 server"));
+                        ses->flags |= CIFS_SES_OS2;
+        }
 
         bcc_ptr += len + 1;
         bleft -= len + 1;
@@ -290,16 +294,11 @@ static int decode_ascii_ssetup(char ** pbcc_area, int bleft, struct cifsSesInfo
         if(len > bleft)
                 return rc;
 
-        if(ses->serverDomain)
-                kfree(ses->serverDomain);
-
-        ses->serverDomain = kzalloc(len + 1, GFP_KERNEL);
-        if(ses->serverOS)
-                strncpy(ses->serverOS, bcc_ptr, len);
-
-        bcc_ptr += len + 1;
-        bleft -= len + 1;
-
+        /* No domain field in LANMAN case. Domain is
+           returned by old servers in the SMB negprot response */
+        /* BB For newer servers which do not support Unicode,
+           but thus do return domain here we could add parsing
+           for it later, but it is not very important */
         cFYI(1,("ascii: bytes left %d",bleft));
 
         return rc;
@@ -366,6 +365,8 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
         str_area = kmalloc(2000, GFP_KERNEL);
         bcc_ptr = str_area;
 
+        ses->flags &= ~CIFS_SES_LANMAN;
+
         if(type == LANMAN) {
 #ifdef CONFIG_CIFS_WEAK_PW_HASH
                 char lnm_session_key[CIFS_SESS_KEY_SIZE];
@@ -377,7 +378,7 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
                 /* and copy into bcc */
 
                 calc_lanman_hash(ses, lnm_session_key);
-
+                ses->flags |= CIFS_SES_LANMAN; 
 /* #ifdef CONFIG_CIFS_DEBUG2
                 cifs_dump_mem("cryptkey: ",ses->server->cryptKey,
                         CIFS_SESS_KEY_SIZE);