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cifs: Add helper function to check smb1+ server

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SMB1 server's header_preamble_size is not 0, add use is_smb1 function
to simplify the code, no actual functional changes.

Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Zhang Xiaoxu 2022-08-23 20:52:02 +08:00 committed by Steve French
parent b6b3624d01
commit d291e703f4
4 changed files with 13 additions and 9 deletions
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3
fs/cifs/cifsencrypt.c
View file

@ -32,10 +32,9 @@ int __cifs_calc_signature(struct smb_rqst *rqst,
int rc;
struct kvec *iov = rqst->rq_iov;
int n_vec = rqst->rq_nvec;
bool is_smb2 = HEADER_PREAMBLE_SIZE(server) == 0;
/* iov[0] is actual data and not the rfc1002 length for SMB2+ */
if (is_smb2) {
if (!is_smb1(server)) {
if (iov[0].iov_len <= 4)
return -EIO;
i = 0;

5
fs/cifs/cifsglob.h
View file

@ -752,6 +752,11 @@ struct TCP_Server_Info {
#endif
};
static inline bool is_smb1(struct TCP_Server_Info *server)
{
return HEADER_PREAMBLE_SIZE(server) != 0;
}
static inline void cifs_server_lock(struct TCP_Server_Info *server)
{
unsigned int nofs_flag = memalloc_nofs_save();

10
fs/cifs/connect.c
View file

@ -871,7 +871,7 @@ smb2_get_credits_from_hdr(char *buffer, struct TCP_Server_Info *server)
/*
* SMB1 does not use credits.
*/
if (HEADER_PREAMBLE_SIZE(server))
if (is_smb1(server))
return 0;
return le16_to_cpu(shdr->CreditRequest);
@ -1121,7 +1121,7 @@ smb2_add_credits_from_hdr(char *buffer, struct TCP_Server_Info *server)
/*
* SMB1 does not use credits.
*/
if (HEADER_PREAMBLE_SIZE(server))
if (is_smb1(server))
return;
if (shdr->CreditRequest) {
@ -1179,10 +1179,10 @@ cifs_demultiplex_thread(void *p)
if (length < 0)
continue;
if (HEADER_PREAMBLE_SIZE(server) == 0)
server->total_read = 0;
else
if (is_smb1(server))
server->total_read = length;
else
server->total_read = 0;
/*
* The right amount was read from socket - 4 bytes,

4
fs/cifs/transport.c
View file

@ -261,7 +261,7 @@ smb_rqst_len(struct TCP_Server_Info *server, struct smb_rqst *rqst)
int nvec;
unsigned long buflen = 0;
if (HEADER_PREAMBLE_SIZE(server) == 0 && rqst->rq_nvec >= 2 &&
if (!is_smb1(server) && rqst->rq_nvec >= 2 &&
rqst->rq_iov[0].iov_len == 4) {
iov = &rqst->rq_iov[1];
nvec = rqst->rq_nvec - 1;
@ -346,7 +346,7 @@ __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
sigprocmask(SIG_BLOCK, &mask, &oldmask);
/* Generate a rfc1002 marker for SMB2+ */
if (HEADER_PREAMBLE_SIZE(server) == 0) {
if (!is_smb1(server)) {
struct kvec hiov = {
.iov_base = &rfc1002_marker,
.iov_len = 4