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@xxxxxxxxxx>
---
fs/cifs/smb2misc.c | 28 ++++++++++++----------------
fs/cifs/smb2ops.c | 44 ++++++++++++++++++--------------------------
fs/cifs/smb2pdu.c | 44 ++++++++++++++++++--------------------------
3 files changed, 48 insertions(+), 68 deletions(-)
diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c
index bec7fd1d731a..c01beb4aa677 100644
--- a/fs/cifs/smb2misc.c
+++ b/fs/cifs/smb2misc.c
@@ -94,8 +94,7 @@ static const __le16 smb2_rsp_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
};
#ifdef CONFIG_CIFS_SMB311
-static __u32 get_neg_ctxt_len(struct smb2_hdr *hdr, __u32 len, __u32 non_ctxlen,
- size_t hdr_preamble_size)
+static __u32 get_neg_ctxt_len(struct smb2_hdr *hdr, __u32 len, __u32 non_ctxlen)
{
__u16 neg_count;
__u32 nc_offset, size_of_pad_before_neg_ctxts;
@@ -109,12 +108,11 @@ static __u32 get_neg_ctxt_len(struct smb2_hdr *hdr, __u32 len, __u32 non_ctxlen,
/* 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))) {
@@ -133,7 +131,7 @@ static __u32 get_neg_ctxt_len(struct smb2_hdr *hdr, __u32 len, __u32 non_ctxlen,
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 */
@@ -182,8 +180,7 @@ 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;
@@ -226,8 +223,7 @@ 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(hdr, len, clc_len,
- srvr->vals->header_preamble_size);
+ clc_len += get_neg_ctxt_len(hdr, len, clc_len);
#endif /* SMB311 */
if (len != clc_len) {
cifs_dbg(FYI, "Calculated size %u length %u mismatch mid %llu\n",
@@ -252,7 +248,7 @@ 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;
}
@@ -400,7 +396,7 @@ 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
@@ -421,12 +417,12 @@ 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:
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 7a64fa212f77..d34c1cef9375 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1518,8 +1518,6 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
unsigned int sub_offset;
unsigned int print_len;
unsigned int print_offset;
- struct cifs_ses *ses = tcon->ses;
- struct TCP_Server_Info *server = ses->server;
cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
@@ -1543,7 +1541,7 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
err_buf = err_iov.iov_base;
if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
- err_iov.iov_len + server->vals->header_preamble_size < SMB2_SYMLINK_STRUCT_SIZE) {
+ err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
kfree(utf16_path);
return -ENOENT;
}
@@ -1556,14 +1554,13 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
print_len = le16_to_cpu(symlink->PrintNameLength);
print_offset = le16_to_cpu(symlink->PrintNameOffset);
- if (err_iov.iov_len + server->vals->header_preamble_size <
- SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
+ if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
kfree(utf16_path);
return -ENOENT;
}
- if (err_iov.iov_len + server->vals->header_preamble_size <
- SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
+ if (err_iov.iov_len <
+ SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
kfree(utf16_path);
return -ENOENT;
}
@@ -2205,7 +2202,7 @@ crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
{
struct smb2_transform_hdr *tr_hdr =
(struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
- unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20 - server->vals->header_preamble_size;
+ unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
int rc = 0;
struct scatterlist *sg;
u8 sign[SMB2_SIGNATURE_SIZE] = {};
@@ -2431,7 +2428,7 @@ decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
if (rc)
return rc;
- memmove(buf + server->vals->header_preamble_size, iov[2].iov_base, buf_data_size);
+ memmove(buf, iov[2].iov_base, buf_data_size);
server->total_read = buf_data_size + page_data_size;
@@ -2537,7 +2534,7 @@ handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
return 0;
}
- data_offset = server->ops->read_data_offset(buf) + server->vals->header_preamble_size;
+ data_offset = server->ops->read_data_offset(buf);
#ifdef CONFIG_CIFS_SMB_DIRECT
use_rdma_mr = rdata->mr;
#endif
@@ -2633,12 +2630,11 @@ receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
unsigned int npages;
struct page **pages;
unsigned int len;
- unsigned int buflen = server->pdu_size + server->vals->header_preamble_size;
+ unsigned int buflen = server->pdu_size;
int rc;
int i = 0;
- len = min_t(unsigned int, buflen, server->vals->read_rsp_size -
- server->vals->header_preamble_size +
+ len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
@@ -2646,8 +2642,7 @@ receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
return rc;
server->total_read += rc;
- len = le32_to_cpu(tr_hdr->OriginalMessageSize) +
- server->vals->header_preamble_size -
+ len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
server->vals->read_rsp_size;
npages = DIV_ROUND_UP(len, PAGE_SIZE);
@@ -2674,8 +2669,7 @@ receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
if (rc)
goto free_pages;
- rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size -
- server->vals->header_preamble_size,
+ rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
pages, npages, len);
if (rc)
goto free_pages;
@@ -2712,7 +2706,7 @@ receive_encrypted_standard(struct TCP_Server_Info *server,
struct mid_q_entry *mid_entry;
/* switch to large buffer if too big for a small one */
- if (pdu_length + server->vals->header_preamble_size > MAX_CIFS_SMALL_BUFFER_SIZE) {
+ if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
server->large_buf = true;
memcpy(server->bigbuf, buf, server->total_read);
buf = server->bigbuf;
@@ -2720,13 +2714,12 @@ receive_encrypted_standard(struct TCP_Server_Info *server,
/* now read the rest */
length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
- pdu_length - HEADER_SIZE(server) + 1 +
- server->vals->header_preamble_size);
+ pdu_length - HEADER_SIZE(server) + 1);
if (length < 0)
return length;
server->total_read += length;
- buf_size = pdu_length + server->vals->header_preamble_size - sizeof(struct smb2_transform_hdr);
+ buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
if (length)
return length;
@@ -2755,7 +2748,7 @@ smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
- if (pdu_length + server->vals->header_preamble_size < sizeof(struct smb2_transform_hdr) +
+ if (pdu_length < sizeof(struct smb2_transform_hdr) +
sizeof(struct smb2_sync_hdr)) {
cifs_dbg(VFS, "Transform message is too small (%u)\n",
pdu_length);
@@ -2764,14 +2757,14 @@ smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
return -ECONNABORTED;
}
- if (pdu_length + server->vals->header_preamble_size < orig_len + sizeof(struct smb2_transform_hdr)) {
+ if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
cifs_dbg(VFS, "Transform message is broken\n");
cifs_reconnect(server);
wake_up(&server->response_q);
return -ECONNABORTED;
}
- if (pdu_length + server->vals->header_preamble_size > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
+ if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
return receive_encrypted_read(server, mid);
return receive_encrypted_standard(server, mid);
@@ -2782,8 +2775,7 @@ smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
{
char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
- return handle_read_data(server, mid, buf, server->pdu_size +
- server->vals->header_preamble_size,
+ return handle_read_data(server, mid, buf, server->pdu_size,
NULL, 0, 0);
}
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 535649d41e90..02e29b83488f 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -475,8 +475,7 @@ static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp,
if (len_of_ctxts < sizeof(struct smb2_neg_context))
break;
- pctx = (struct smb2_neg_context *)(offset +
- server->vals->header_preamble_size + (char *)rsp);
+ pctx = (struct smb2_neg_context *)(offset + (char *)rsp);
clen = le16_to_cpu(pctx->DataLength);
if (clen > len_of_ctxts)
break;
@@ -1136,7 +1135,7 @@ SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
if (rc)
goto out;
- if (offsetof(struct smb2_sess_setup_rsp, Buffer) - ses->server->vals->header_preamble_size !=
+ if (offsetof(struct smb2_sess_setup_rsp, Buffer) !=
le16_to_cpu(rsp->SecurityBufferOffset)) {
cifs_dbg(VFS, "Invalid security buffer offset %d\n",
le16_to_cpu(rsp->SecurityBufferOffset));
@@ -1583,7 +1582,7 @@ parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
unsigned int remaining;
char *name;
- data_offset = (char *)rsp + server->vals->header_preamble_size + le32_to_cpu(rsp->CreateContextsOffset);
+ data_offset = (char *)rsp + le32_to_cpu(rsp->CreateContextsOffset);
remaining = le32_to_cpu(rsp->CreateContextsLength);
cc = (struct create_context *)data_offset;
while (remaining >= sizeof(struct create_context)) {
@@ -2210,13 +2209,12 @@ SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
}
static int
-validate_iov(struct TCP_Server_Info *server,
- unsigned int offset, unsigned int buffer_length,
+validate_iov(unsigned int offset, unsigned int buffer_length,
struct kvec *iov, unsigned int min_buf_size)
{
unsigned int smb_len = iov->iov_len;
- char *end_of_smb = smb_len + server->vals->header_preamble_size + (char *)iov->iov_base;
- char *begin_of_buf = server->vals->header_preamble_size + offset + (char *)iov->iov_base;
+ char *end_of_smb = smb_len + (char *)iov->iov_base;
+ char *begin_of_buf = offset + (char *)iov->iov_base;
char *end_of_buf = begin_of_buf + buffer_length;
@@ -2246,18 +2244,17 @@ validate_iov(struct TCP_Server_Info *server,
* Caller must free buffer.
*/
static int
-validate_and_copy_iov(struct TCP_Server_Info *server,
- unsigned int offset, unsigned int buffer_length,
+validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
struct kvec *iov, unsigned int minbufsize,
char *data)
{
- char *begin_of_buf = server->vals->header_preamble_size + offset + (char *)(iov->iov_base);
+ char *begin_of_buf = offset + (char *)iov->iov_base;
int rc;
if (!data)
return -EINVAL;
- rc = validate_iov(server, offset, buffer_length, iov, minbufsize);
+ rc = validate_iov(offset, buffer_length, iov, minbufsize);
if (rc)
return rc;
@@ -2335,8 +2332,7 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon,
}
}
- rc = validate_and_copy_iov(ses->server,
- le16_to_cpu(rsp->OutputBufferOffset),
+ rc = validate_and_copy_iov(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength),
&rsp_iov, min_len, *data);
@@ -3256,8 +3252,7 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
goto qdir_exit;
}
- rc = validate_iov(server,
- le16_to_cpu(rsp->OutputBufferOffset),
+ rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
info_buf_size);
if (rc)
@@ -3589,7 +3584,7 @@ build_qfs_info_req(struct kvec *iov, struct cifs_tcon *tcon, int level,
req->InputBufferOffset =
cpu_to_le16(sizeof(struct smb2_query_info_req) - 1);
req->OutputBufferLength = cpu_to_le32(
- outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - server->vals->header_preamble_size);
+ outbuf_len + sizeof(struct smb2_query_info_rsp) - 1);
iov->iov_base = (char *)req;
iov->iov_len = total_len;
@@ -3606,7 +3601,6 @@ SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
int rc = 0;
int resp_buftype;
struct cifs_ses *ses = tcon->ses;
- struct TCP_Server_Info *server = ses->server;
struct smb2_fs_full_size_info *info = NULL;
int flags = 0;
@@ -3627,10 +3621,9 @@ SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
}
rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
- info = (struct smb2_fs_full_size_info *)(server->vals->header_preamble_size +
+ info = (struct smb2_fs_full_size_info *)(
le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
- rc = validate_iov(server,
- le16_to_cpu(rsp->OutputBufferOffset),
+ rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
sizeof(struct smb2_fs_full_size_info));
if (!rc)
@@ -3651,7 +3644,6 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
int rc = 0;
int resp_buftype, max_len, min_len;
struct cifs_ses *ses = tcon->ses;
- struct TCP_Server_Info *server = ses->server;
unsigned int rsp_len, offset;
int flags = 0;
@@ -3687,20 +3679,20 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
rsp_len = le32_to_cpu(rsp->OutputBufferLength);
offset = le16_to_cpu(rsp->OutputBufferOffset);
- rc = validate_iov(server, offset, rsp_len, &rsp_iov, min_len);
+ rc = validate_iov(offset, rsp_len, &rsp_iov, min_len);
if (rc)
goto qfsattr_exit;
if (level == FS_ATTRIBUTE_INFORMATION)
- memcpy(&tcon->fsAttrInfo, server->vals->header_preamble_size + offset
+ memcpy(&tcon->fsAttrInfo, offset
+ (char *)rsp, min_t(unsigned int,
rsp_len, max_len));
else if (level == FS_DEVICE_INFORMATION)
- memcpy(&tcon->fsDevInfo, server->vals->header_preamble_size + offset
+ memcpy(&tcon->fsDevInfo, offset
+ (char *)rsp, sizeof(FILE_SYSTEM_DEVICE_INFO));
else if (level == FS_SECTOR_SIZE_INFORMATION) {
struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
- (server->vals->header_preamble_size + offset + (char *)rsp);
+ (offset + (char *)rsp);
tcon->ss_flags = le32_to_cpu(ss_info->Flags);
tcon->perf_sector_size =
le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
--
2.13.3
--
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