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[CIFS] Change pragma pack(1) to attribute(packed) to allow cifs on arm to access

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unaligned structures coming in off the wire

gcc on arm processors generates very odd code with pragma pack specified -
although it does pack the structures in some sense - it does not allow you
to access unaligned elements in nested structures at the right offset as other
architectures do.  Oddly enough though, specifying the structures as packed
the long way - one by one with the packed attribute does work.  Rather than
fighting over whether this is a gcc bug or some obscure side effect
of pragma pack, it is easier to do what most (all but 96 other places in
the kernel) do - and replace pragma pack with dozens of attribute(packed)
structure qualifiers.  Much more verbose ... but at least it works.

Signed-off-by: David Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>  CG: -----------------------------------------------------------------------
This commit is contained in:
Steve French 2005-10-27 13:55:12 -07:00
parent 04290949b3
commit 0753ca7bc2
3 changed files with 182 additions and 186 deletions
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343
fs/cifs/cifspdu.h
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File diff suppressed because it is too large Load Diff

12
fs/cifs/ntlmssp.h
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@ -19,8 +19,6 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#pragma pack(1)
#define NTLMSSP_SIGNATURE "NTLMSSP"
/* Message Types */
#define NtLmNegotiate cpu_to_le32(1)
@ -63,7 +61,7 @@ typedef struct _SECURITY_BUFFER {
__le16 Length;
__le16 MaximumLength;
__le32 Buffer; /* offset to buffer */
} SECURITY_BUFFER;
} __attribute__((packed)) SECURITY_BUFFER;
typedef struct _NEGOTIATE_MESSAGE {
__u8 Signature[sizeof (NTLMSSP_SIGNATURE)];
@ -73,7 +71,7 @@ typedef struct _NEGOTIATE_MESSAGE {
SECURITY_BUFFER WorkstationName; /* RFC 1001 and ASCII */
char DomainString[0];
/* followed by WorkstationString */
} NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE;
} __attribute__((packed)) NEGOTIATE_MESSAGE, *PNEGOTIATE_MESSAGE;
typedef struct _CHALLENGE_MESSAGE {
__u8 Signature[sizeof (NTLMSSP_SIGNATURE)];
@ -83,7 +81,7 @@ typedef struct _CHALLENGE_MESSAGE {
__u8 Challenge[CIFS_CRYPTO_KEY_SIZE];
__u8 Reserved[8];
SECURITY_BUFFER TargetInfoArray;
} CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE;
} __attribute__((packed)) CHALLENGE_MESSAGE, *PCHALLENGE_MESSAGE;
typedef struct _AUTHENTICATE_MESSAGE {
__u8 Signature[sizeof (NTLMSSP_SIGNATURE)];
@ -96,6 +94,4 @@ typedef struct _AUTHENTICATE_MESSAGE {
SECURITY_BUFFER SessionKey;
__le32 NegotiateFlags;
char UserString[0];
} AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE;
#pragma pack() /* resume default structure packing */
} __attribute__((packed)) AUTHENTICATE_MESSAGE, *PAUTHENTICATE_MESSAGE;

13
fs/cifs/rfc1002pdu.h
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@ -21,8 +21,6 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#pragma pack(1)
/* NB: unlike smb/cifs packets, the RFC1002 structures are big endian */
/* RFC 1002 session packet types */
@ -48,17 +46,17 @@ struct rfc1002_session_packet {
__u8 calling_len;
__u8 calling_name[32];
__u8 scope2; /* null */
} session_req;
} __attribute__((packed)) session_req;
struct {
__u32 retarget_ip_addr;
__u16 port;
} retarget_resp;
} __attribute__((packed)) retarget_resp;
__u8 neg_ses_resp_error_code;
/* POSITIVE_SESSION_RESPONSE packet does not include trailer.
SESSION_KEEP_ALIVE packet also does not include a trailer.
Trailer for the SESSION_MESSAGE packet is SMB/CIFS header */
} trailer;
};
} __attribute__((packed)) trailer;
} __attribute__((packed));
/* Negative Session Response error codes */
#define RFC1002_NOT_LISTENING_CALLED 0x80 /* not listening on called name */
@ -74,6 +72,3 @@ server netbios name). Currently server names are resolved only via DNS
(tcp name) or ip address or an /etc/hosts equivalent mapping to ip address.*/
#define DEFAULT_CIFS_CALLED_NAME "*SMBSERVER "
#pragma pack() /* resume default structure packing */