[CIFS] Remove unneeded QuerySymlink call and fix mapping for unmapped status

Signed-off-by: Steve French <sfrench@us.ibm.com>

fs/cifs/connect.c

@@ -3509,8 +3509,6 @@ int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
 					   struct nls_table *nls_info)
 {
 	int rc = 0;
-	char ntlm_session_key[CIFS_SESS_KEY_SIZE];
-	bool ntlmv2_flag = false;
 	int first_time = 0;
 	struct TCP_Server_Info *server = pSesInfo->server;
 

fs/cifs/link.c

@@ -257,13 +257,8 @@ cifs_readlink(struct dentry *direntry, char __user *pBuffer, int buflen)
 
 /* BB add read reparse point symlink code and
 	Unix extensions symlink code here BB */
-/* We could disable this based on pTcon->unix_ext flag instead ... but why? */
-	if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
-		rc = CIFSSMBUnixQuerySymLink(xid, pTcon, full_path,
-				tmpbuffer,
-				len - 1,
-				cifs_sb->local_nls);
-	else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
+
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
 		cERROR(1, ("SFU style symlinks not implemented yet"));
 		/* add open and read as in fs/cifs/inode.c */
 	} else {

fs/cifs/netmisc.c

@@ -79,6 +79,7 @@ static const struct smb_to_posix_error mapping_table_ERRDOS[] = {
 	{ErrQuota, -EDQUOT},
 	{ErrNotALink, -ENOLINK},
 	{ERRnetlogonNotStarted, -ENOPROTOOPT},
+	{ERRsymlink, -EOPNOTSUPP},
 	{ErrTooManyLinks, -EMLINK},
 	{0, 0}
 };
@@ -714,6 +715,7 @@ static const struct {
 	ERRDOS, ERRnoaccess, 0xc000028f}, {
 	ERRDOS, ERRnoaccess, 0xc0000290}, {
 	ERRDOS, ERRbadfunc, 0xc000029c}, {
+	ERRDOS, ERRsymlink, NT_STATUS_STOPPED_ON_SYMLINK}, {
 	ERRDOS, ERRinvlevel, 0x007c0001}, };
 
 /*****************************************************************************

fs/cifs/nterr.h

@@ -35,8 +35,6 @@ struct nt_err_code_struct {
 extern const struct nt_err_code_struct nt_errs[];
 
 /* Win32 Status codes. */
-
-#define STATUS_BUFFER_OVERFLOW            0x80000005
 #define STATUS_MORE_ENTRIES               0x0105
 #define ERROR_INVALID_PARAMETER		  0x0057
 #define ERROR_INSUFFICIENT_BUFFER	  0x007a
@@ -50,6 +48,13 @@ extern const struct nt_err_code_struct nt_errs[];
 #define STATUS_SOME_UNMAPPED       0x0107
 #define STATUS_BUFFER_OVERFLOW     0x80000005
 #define NT_STATUS_NO_MORE_ENTRIES  0x8000001a
+#define NT_STATUS_MEDIA_CHANGED    0x8000001c
+#define NT_STATUS_END_OF_MEDIA     0x8000001e
+#define NT_STATUS_MEDIA_CHECK      0x80000020
+#define NT_STATUS_NO_DATA_DETECTED 0x8000001c
+#define NT_STATUS_STOPPED_ON_SYMLINK 0x8000002d
+#define NT_STATUS_DEVICE_REQUIRES_CLEANING 0x80000288
+#define NT_STATUS_DEVICE_DOOR_OPEN 0x80000288
 #define NT_STATUS_UNSUCCESSFUL 0xC0000000 | 0x0001
 #define NT_STATUS_NOT_IMPLEMENTED 0xC0000000 | 0x0002
 #define NT_STATUS_INVALID_INFO_CLASS 0xC0000000 | 0x0003

fs/cifs/smberr.h

@@ -110,6 +110,7 @@
 
 /* Below errors are used internally (do not come over the wire) for passthrough
    from STATUS codes to POSIX only  */
+#define ERRsymlink              0xFFFD
 #define ErrTooManyLinks         0xFFFE
 
 /* Following error codes may be generated with the ERRSRV error class.*/