[CIFS] add constants for string lengths of keynames in SPNEGO upcall string

	.describe	= user_describe,

};

#define MAX_VER_STR_LEN   8 /* length of longest version string e.g.

				strlen("ver=0xFF") */

#define MAX_MECH_STR_LEN 13 /* length of longest security mechanism name, eg

			       in future could have strlen(";sec=ntlmsspi") */

#define MAX_IPV6_ADDR_LEN 42 /* eg FEDC:BA98:7654:3210:FEDC:BA98:7654:3210/60 */

/* length of longest version string e.g.  strlen("ver=0xFF") */

#define MAX_VER_STR_LEN		8

/* length of longest security mechanism name, eg in future could have

 * strlen(";sec=ntlmsspi") */

#define MAX_MECH_STR_LEN	13

/* max possible addr len eg FEDC:BA98:7654:3210:FEDC:BA98:7654:3210/60 */

#define MAX_IPV6_ADDR_LEN	42

/* strlen of "host=" */

#define HOST_KEY_LEN		5

/* strlen of ";ip4=" or ";ip6=" */

#define IP_KEY_LEN		5

/* strlen of ";uid=0x" */

#define UID_KEY_LEN		7

/* strlen of ";user=" */

#define USER_KEY_LEN		6

/* get a key struct with a SPNEGO security blob, suitable for session setup */

struct key *

cifs_get_spnego_key(struct cifsSesInfo *sesInfo)

	/* length of fields (with semicolons): ver=0xyz ip4=ipaddress

	   host=hostname sec=mechanism uid=0xFF user=username */

	desc_len = MAX_VER_STR_LEN +

		   6 /* len of "host=" */ + strlen(hostname) +

		   5 /* len of ";ipv4=" */ + MAX_IPV6_ADDR_LEN +

		   HOST_KEY_LEN + strlen(hostname) +

		   IP_KEY_LEN + MAX_IPV6_ADDR_LEN +

		   MAX_MECH_STR_LEN +

		   7 /* len of ";uid=0x" */ + (sizeof(uid_t) * 2) +

		   6 /* len of ";user=" */ + strlen(sesInfo->userName) + 1;

		   UID_KEY_LEN + (sizeof(uid_t) * 2) +

		   USER_KEY_LEN + strlen(sesInfo->userName) + 1;

	spnego_key = ERR_PTR(-ENOMEM);

	description = kzalloc(desc_len, GFP_KERNEL);