cifs: remove header_preamble_size where it is always 0
Since header_preamble_size is 0 for SMB2+ we can remove it in those
code paths that are only invoked from SMB2.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c
index d587a09..ea964f7 100644
--- a/fs/cifs/smb2misc.c
+++ b/fs/cifs/smb2misc.c
@@ -95,8 +95,7 @@ static const __le16 smb2_rsp_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
#ifdef CONFIG_CIFS_SMB311
static __u32 get_neg_ctxt_len(struct smb2_sync_hdr *hdr, __u32 len,
- __u32 non_ctxlen,
- size_t hdr_preamble_size)
+ __u32 non_ctxlen)
{
__u16 neg_count;
__u32 nc_offset, size_of_pad_before_neg_ctxts;
@@ -110,12 +109,11 @@ static __u32 get_neg_ctxt_len(struct smb2_sync_hdr *hdr, __u32 len,
/* Make sure that negotiate contexts start after gss security blob */
nc_offset = le32_to_cpu(pneg_rsp->NegotiateContextOffset);
- if (nc_offset < non_ctxlen - hdr_preamble_size /* RFC1001 len */) {
+ if (nc_offset < non_ctxlen) {
printk_once(KERN_WARNING "invalid negotiate context offset\n");
return 0;
}
- size_of_pad_before_neg_ctxts = nc_offset -
- (non_ctxlen - hdr_preamble_size);
+ size_of_pad_before_neg_ctxts = nc_offset - non_ctxlen;
/* Verify that at least minimal negotiate contexts fit within frame */
if (len < nc_offset + (neg_count * sizeof(struct smb2_neg_context))) {
@@ -134,7 +132,7 @@ static __u32 get_neg_ctxt_len(struct smb2_sync_hdr *hdr, __u32 len,
int
smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *srvr)
{
- struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)(buf + srvr->vals->header_preamble_size);
+ struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
struct smb2_sync_pdu *pdu = (struct smb2_sync_pdu *)shdr;
__u64 mid;
__u32 clc_len; /* calculated length */
@@ -183,8 +181,7 @@ smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *srvr)
}
return 1;
}
- if (len > CIFSMaxBufSize + MAX_SMB2_HDR_SIZE -
- srvr->vals->header_preamble_size) {
+ if (len > CIFSMaxBufSize + MAX_SMB2_HDR_SIZE) {
cifs_dbg(VFS, "SMB length greater than maximum, mid=%llu\n",
mid);
return 1;
@@ -227,8 +224,7 @@ smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *srvr)
#ifdef CONFIG_CIFS_SMB311
if (shdr->Command == SMB2_NEGOTIATE)
- clc_len += get_neg_ctxt_len(shdr, len, clc_len,
- srvr->vals->header_preamble_size);
+ clc_len += get_neg_ctxt_len(shdr, len, clc_len);
#endif /* SMB311 */
if (len != clc_len) {
cifs_dbg(FYI, "Calculated size %u length %u mismatch mid %llu\n",
@@ -253,7 +249,7 @@ smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *srvr)
*/
if (clc_len < len) {
printk_once(KERN_WARNING
- "SMB2 server sent bad RFC1001 len %d not %u\n",
+ "SMB2 server sent bad RFC1001 len %d not %d\n",
len, clc_len);
return 0;
}
@@ -401,7 +397,7 @@ smb2_calc_size(void *buf, struct TCP_Server_Info *srvr)
int offset; /* the offset from the beginning of SMB to data area */
int data_length; /* the length of the variable length data area */
/* Structure Size has already been checked to make sure it is 64 */
- int len = srvr->vals->header_preamble_size + le16_to_cpu(shdr->StructureSize);
+ int len = le16_to_cpu(shdr->StructureSize);
/*
* StructureSize2, ie length of fixed parameter area has already
@@ -422,12 +418,12 @@ smb2_calc_size(void *buf, struct TCP_Server_Info *srvr)
* for some commands, typically those with odd StructureSize,
* so we must add one to the calculation.
*/
- if (offset + srvr->vals->header_preamble_size + 1 < len) {
- cifs_dbg(VFS, "data area offset %zu overlaps SMB2 header %d\n",
- offset + srvr->vals->header_preamble_size + 1, len);
+ if (offset + 1 < len) {
+ cifs_dbg(VFS, "data area offset %d overlaps SMB2 header %d\n",
+ offset + 1, len);
data_length = 0;
} else {
- len = srvr->vals->header_preamble_size + offset + data_length;
+ len = offset + data_length;
}
}
calc_size_exit: