Separate out all the 4 byte rfc1002 headers so that they are no longer
part of the SMB2 header structures to prepare for future work to add
compounding support.
Signed-off-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
---
fs/cifs/connect.c | 6 ++-
fs/cifs/smb2misc.c | 88 ++++++++++++++++--------------------
fs/cifs/smb2ops.c | 115 ++++++++++++++++++++++++++++--------------------
fs/cifs/smb2pdu.c | 22 ++++-----
fs/cifs/smb2pdu.h | 26 ++---------
fs/cifs/smb2proto.h | 3 +-
fs/cifs/smb2transport.c | 12 +++--
7 files changed, 129 insertions(+), 143 deletions(-)
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index e8830f076a7f..ea426bb97872 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -874,7 +874,11 @@ cifs_demultiplex_thread(void *p)
length = cifs_read_from_socket(server, buf, pdu_length);
if (length < 0)
continue;
- server->total_read = length;
+
+ if (server->vals->header_preamble_size == 0)
+ server->total_read = 0;
+ else
+ server->total_read = length;
/*
* The right amount was read from socket - 4 bytes,
diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c
index 68ea8491c160..f73bcc825002 100644
--- a/fs/cifs/smb2misc.c
+++ b/fs/cifs/smb2misc.c
@@ -131,25 +131,20 @@ static __u32 get_neg_ctxt_len(struct smb2_hdr *hdr, __u32 len, __u32 non_ctxlen,
#endif /* CIFS_SMB311 */
int
-smb2_check_message(char *buf, unsigned int length, struct TCP_Server_Info *srvr)
+smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *srvr)
{
- struct smb2_pdu *pdu = (struct smb2_pdu *)buf;
- struct smb2_hdr *hdr = &pdu->hdr;
- struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
+ struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
+ struct smb2_sync_pdu *pdu = (struct smb2_sync_pdu *)shdr;
__u64 mid;
- __u32 len = get_rfc1002_length(buf);
__u32 clc_len; /* calculated length */
int command;
-
- /* BB disable following printk later */
- cifs_dbg(FYI, "%s length: 0x%x, smb_buf_length: 0x%x\n",
- __func__, length, len);
+ int pdu_size = sizeof(struct smb2_sync_pdu);
+ int hdr_size = sizeof(struct smb2_sync_hdr);
/*
* Add function to do table lookup of StructureSize by command
* ie Validate the wct via smb2_struct_sizes table above
*/
-
if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
struct smb2_transform_hdr *thdr =
(struct smb2_transform_hdr *)buf;
@@ -173,8 +168,8 @@ smb2_check_message(char *buf, unsigned int length, struct TCP_Server_Info *srvr)
}
mid = le64_to_cpu(shdr->MessageId);
- if (length < sizeof(struct smb2_pdu)) {
- if ((length >= sizeof(struct smb2_hdr))
+ if (len < pdu_size) {
+ if ((len >= hdr_size)
&& (shdr->Status != 0)) {
pdu->StructureSize2 = 0;
/*
@@ -227,13 +222,7 @@ smb2_check_message(char *buf, unsigned int length, struct TCP_Server_Info *srvr)
}
}
- if (srvr->vals->header_preamble_size + len != length) {
- cifs_dbg(VFS, "Total length %u RFC1002 length %zu mismatch mid %llu\n",
- length, srvr->vals->header_preamble_size + len, mid);
- return 1;
- }
-
- clc_len = smb2_calc_size(hdr);
+ clc_len = smb2_calc_size(buf);
#ifdef CONFIG_CIFS_SMB311
if (shdr->Command == SMB2_NEGOTIATE)
@@ -305,15 +294,14 @@ static const bool has_smb2_data_area[NUMBER_OF_SMB2_COMMANDS] = {
* area and the offset to it (from the beginning of the smb are also returned.
*/
char *
-smb2_get_data_area_len(int *off, int *len, struct smb2_hdr *hdr)
+smb2_get_data_area_len(int *off, int *len, struct smb2_sync_hdr *shdr)
{
- struct smb2_sync_hdr *shdr = get_sync_hdr(hdr);
*off = 0;
*len = 0;
/* error responses do not have data area */
if (shdr->Status && shdr->Status != STATUS_MORE_PROCESSING_REQUIRED &&
- (((struct smb2_err_rsp *)hdr)->StructureSize) ==
+ (((struct smb2_err_rsp *)shdr)->StructureSize) ==
SMB2_ERROR_STRUCTURE_SIZE2)
return NULL;
@@ -325,42 +313,44 @@ smb2_get_data_area_len(int *off, int *len, struct smb2_hdr *hdr)
switch (shdr->Command) {
case SMB2_NEGOTIATE:
*off = le16_to_cpu(
- ((struct smb2_negotiate_rsp *)hdr)->SecurityBufferOffset);
+ ((struct smb2_sess_setup_rsp *)shdr)->SecurityBufferOffset);
*len = le16_to_cpu(
- ((struct smb2_negotiate_rsp *)hdr)->SecurityBufferLength);
+ ((struct smb2_sess_setup_rsp *)shdr)->SecurityBufferLength);
break;
case SMB2_SESSION_SETUP:
*off = le16_to_cpu(
- ((struct smb2_sess_setup_rsp *)hdr)->SecurityBufferOffset);
+ ((struct smb2_sess_setup_rsp *)shdr)->SecurityBufferOffset);
*len = le16_to_cpu(
- ((struct smb2_sess_setup_rsp *)hdr)->SecurityBufferLength);
+ ((struct smb2_sess_setup_rsp *)shdr)->SecurityBufferLength);
break;
case SMB2_CREATE:
*off = le32_to_cpu(
- ((struct smb2_create_rsp *)hdr)->CreateContextsOffset);
+ ((struct smb2_create_rsp *)shdr)->CreateContextsOffset);
*len = le32_to_cpu(
- ((struct smb2_create_rsp *)hdr)->CreateContextsLength);
+ ((struct smb2_create_rsp *)shdr)->CreateContextsLength);
break;
case SMB2_QUERY_INFO:
*off = le16_to_cpu(
- ((struct smb2_query_info_rsp *)hdr)->OutputBufferOffset);
+ ((struct smb2_query_info_rsp *)shdr)->OutputBufferOffset);
*len = le32_to_cpu(
- ((struct smb2_query_info_rsp *)hdr)->OutputBufferLength);
+ ((struct smb2_query_info_rsp *)shdr)->OutputBufferLength);
break;
case SMB2_READ:
- *off = ((struct smb2_read_rsp *)hdr)->DataOffset;
- *len = le32_to_cpu(((struct smb2_read_rsp *)hdr)->DataLength);
+ /* TODO: is this a bug ? */
+ *off = ((struct smb2_read_rsp *)shdr)->DataOffset;
+ *len = le32_to_cpu(((struct smb2_read_rsp *)shdr)->DataLength);
break;
case SMB2_QUERY_DIRECTORY:
*off = le16_to_cpu(
- ((struct smb2_query_directory_rsp *)hdr)->OutputBufferOffset);
+ ((struct smb2_query_directory_rsp *)shdr)->OutputBufferOffset);
*len = le32_to_cpu(
- ((struct smb2_query_directory_rsp *)hdr)->OutputBufferLength);
+ ((struct smb2_query_directory_rsp *)shdr)->OutputBufferLength);
break;
case SMB2_IOCTL:
*off = le32_to_cpu(
- ((struct smb2_ioctl_rsp *)hdr)->OutputOffset);
- *len = le32_to_cpu(((struct smb2_ioctl_rsp *)hdr)->OutputCount);
+ ((struct smb2_ioctl_rsp *)shdr)->OutputOffset);
+ *len = le32_to_cpu(
+ ((struct smb2_ioctl_rsp *)shdr)->OutputCount);
break;
case SMB2_CHANGE_NOTIFY:
default:
@@ -405,13 +395,12 @@ smb2_get_data_area_len(int *off, int *len, struct smb2_hdr *hdr)
unsigned int
smb2_calc_size(void *buf)
{
- struct smb2_pdu *pdu = (struct smb2_pdu *)buf;
- struct smb2_hdr *hdr = &pdu->hdr;
- struct smb2_sync_hdr *shdr = get_sync_hdr(hdr);
+ struct smb2_sync_pdu *pdu = (struct smb2_sync_pdu *)buf;
+ struct smb2_sync_hdr *shdr = &pdu->sync_hdr;
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 = 4 + le16_to_cpu(shdr->StructureSize);
+ int len = le16_to_cpu(shdr->StructureSize);
/*
* StructureSize2, ie length of fixed parameter area has already
@@ -422,7 +411,7 @@ smb2_calc_size(void *buf)
if (has_smb2_data_area[le16_to_cpu(shdr->Command)] == false)
goto calc_size_exit;
- smb2_get_data_area_len(&offset, &data_length, hdr);
+ smb2_get_data_area_len(&offset, &data_length, shdr);
cifs_dbg(FYI, "SMB2 data length %d offset %d\n", data_length, offset);
if (data_length > 0) {
@@ -430,15 +419,14 @@ smb2_calc_size(void *buf)
* Check to make sure that data area begins after fixed area,
* Note that last byte of the fixed area is part of data area
* for some commands, typically those with odd StructureSize,
- * so we must add one to the calculation (and 4 to account for
- * the size of the RFC1001 hdr.
+ * so we must add one to the calculation.
*/
- if (offset + 4 + 1 < len) {
+ if (offset + 1 < len) {
cifs_dbg(VFS, "data area offset %d overlaps SMB2 header %d\n",
- offset + 4 + 1, len);
+ offset + 1, len);
data_length = 0;
} else {
- len = 4 + offset + data_length;
+ len = offset + data_length;
}
}
calc_size_exit:
@@ -621,7 +609,7 @@ smb2_is_valid_lease_break(char *buffer)
bool
smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server)
{
- struct smb2_oplock_break_rsp *rsp = (struct smb2_oplock_break_rsp *)buffer;
+ struct smb2_oplock_break *rsp = (struct smb2_oplock_break *)buffer;
struct list_head *tmp, *tmp1, *tmp2;
struct cifs_ses *ses;
struct cifs_tcon *tcon;
@@ -630,7 +618,7 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server)
cifs_dbg(FYI, "Checking for oplock break\n");
- if (rsp->hdr.sync_hdr.Command != SMB2_OPLOCK_BREAK)
+ if (rsp->sync_hdr.Command != SMB2_OPLOCK_BREAK)
return false;
if (rsp->StructureSize !=
@@ -721,8 +709,8 @@ smb2_cancelled_close_fid(struct work_struct *work)
int
smb2_handle_cancelled_mid(char *buffer, struct TCP_Server_Info *server)
{
- struct smb2_sync_hdr *sync_hdr = get_sync_hdr(buffer);
- struct smb2_create_rsp *rsp = (struct smb2_create_rsp *)buffer;
+ struct smb2_sync_hdr *sync_hdr = (struct smb2_sync_hdr *)buffer;
+ struct smb2_create_rsp *rsp = (struct smb2_create_rsp *)sync_hdr;
struct cifs_tcon *tcon;
struct close_cancelled_open *cancelled;
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index b4ae932ea134..945a7b1ed8d7 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -123,7 +123,8 @@ smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
static unsigned int
smb2_get_credits(struct mid_q_entry *mid)
{
- struct smb2_sync_hdr *shdr = get_sync_hdr(mid->resp_buf);
+ char *buf = mid->resp_buf;
+ struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
return le16_to_cpu(shdr->CreditRequest);
}
@@ -2054,12 +2055,11 @@ smb2_dir_needs_close(struct cifsFileInfo *cfile)
}
static void
-fill_transform_hdr(struct TCP_Server_Info *server,
- struct smb2_transform_hdr *tr_hdr, struct smb_rqst *old_rq)
+fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
+ struct smb_rqst *old_rq)
{
struct smb2_sync_hdr *shdr =
(struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
- unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
@@ -2067,8 +2067,6 @@ fill_transform_hdr(struct TCP_Server_Info *server,
tr_hdr->Flags = cpu_to_le16(0x01);
get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
- inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - server->vals->header_preamble_size);
- inc_rfc1001_len(tr_hdr, orig_len);
}
/* We can not use the normal sg_set_buf() as we will sometimes pass a
@@ -2080,11 +2078,16 @@ static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
}
+/* Assumes:
+ * rqst->rq_iov[0] is rfc1002 length
+ * rqst->rq_iov[1] is tranform header
+ * rqst->rq_iov[2+] data to be encrypted/decrypted
+ */
static struct scatterlist *
init_sg(struct smb_rqst *rqst, u8 *sign)
{
- unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
- unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
+ unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages;
+ unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
struct scatterlist *sg;
unsigned int i;
unsigned int j;
@@ -2094,10 +2097,10 @@ init_sg(struct smb_rqst *rqst, u8 *sign)
return NULL;
sg_init_table(sg, sg_len);
- smb2_sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 24, assoc_data_len);
- for (i = 1; i < rqst->rq_nvec; i++)
- smb2_sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
- rqst->rq_iov[i].iov_len);
+ smb2_sg_set_buf(&sg[0], rqst->rq_iov[1].iov_base + 20, assoc_data_len);
+ for (i = 1; i < rqst->rq_nvec - 1; i++)
+ smb2_sg_set_buf(&sg[i], rqst->rq_iov[i+1].iov_base,
+ rqst->rq_iov[i+1].iov_len);
for (j = 0; i < sg_len - 1; i++, j++) {
unsigned int len = (j < rqst->rq_npages - 1) ? rqst->rq_pagesz
: rqst->rq_tailsz;
@@ -2129,9 +2132,10 @@ smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
}
/*
* Encrypt or decrypt @rqst message. @rqst has the following format:
- * iov[0] - transform header (associate data),
- * iov[1-N] and pages - data to encrypt.
- * On success return encrypted data in iov[1-N] and pages, leave iov[0]
+ * iov[0] - rfc1002 length
+ * iov[1] - transform header (associate data),
+ * iov[2-N] and pages - data to encrypt.
+ * On success return encrypted data in iov[2-N] and pages, leave iov[0-1]
* untouched.
*/
static int
@@ -2226,6 +2230,10 @@ crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
return rc;
}
+/*
+ * This is called from smb_send_rqst. At this point we have the rfc1002
+ * header as the first element in the vector.
+ */
static int
smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
struct smb_rqst *old_rq)
@@ -2234,6 +2242,7 @@ smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
struct page **pages;
struct smb2_transform_hdr *tr_hdr;
unsigned int npages = old_rq->rq_npages;
+ unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
int i;
int rc = -ENOMEM;
@@ -2252,24 +2261,34 @@ smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
goto err_free_pages;
}
- iov = kmalloc_array(old_rq->rq_nvec, sizeof(struct kvec), GFP_KERNEL);
+ /* Make space for one extra iov to hold the transform header */
+ iov = kmalloc_array(old_rq->rq_nvec + 1, sizeof(struct kvec),
+ GFP_KERNEL);
if (!iov)
goto err_free_pages;
/* copy all iovs from the old except the 1st one (rfc1002 length) */
- memcpy(&iov[1], &old_rq->rq_iov[1],
+ memcpy(&iov[2], &old_rq->rq_iov[1],
sizeof(struct kvec) * (old_rq->rq_nvec - 1));
+ /* copy the rfc1002 iov */
+ iov[0].iov_base = old_rq->rq_iov[0].iov_base;
+ iov[0].iov_len = old_rq->rq_iov[0].iov_len;
+
new_rq->rq_iov = iov;
- new_rq->rq_nvec = old_rq->rq_nvec;
+ new_rq->rq_nvec = old_rq->rq_nvec + 1;
tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
if (!tr_hdr)
goto err_free_iov;
- /* fill the 1st iov with a transform header */
- fill_transform_hdr(server, tr_hdr, old_rq);
- new_rq->rq_iov[0].iov_base = tr_hdr;
- new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
+ /* fill the 2nd iov with a transform header */
+ fill_transform_hdr(tr_hdr, orig_len, old_rq);
+ new_rq->rq_iov[1].iov_base = tr_hdr;
+ new_rq->rq_iov[1].iov_len = sizeof(struct smb2_transform_hdr);
+
+ /* Update rfc1002 header */
+ inc_rfc1001_len(new_rq->rq_iov[0].iov_base,
+ sizeof(struct smb2_transform_hdr));
/* copy pages form the old */
for (i = 0; i < npages; i++) {
@@ -2309,7 +2328,7 @@ smb3_free_transform_rq(struct smb_rqst *rqst)
put_page(rqst->rq_pages[i]);
kfree(rqst->rq_pages);
/* free transform header */
- kfree(rqst->rq_iov[0].iov_base);
+ kfree(rqst->rq_iov[1].iov_base);
kfree(rqst->rq_iov);
}
@@ -2326,18 +2345,19 @@ decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
unsigned int buf_data_size, struct page **pages,
unsigned int npages, unsigned int page_data_size)
{
- struct kvec iov[2];
+ struct kvec iov[3];
struct smb_rqst rqst = {NULL};
- struct smb2_hdr *hdr;
int rc;
- iov[0].iov_base = buf;
- iov[0].iov_len = sizeof(struct smb2_transform_hdr);
- iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
- iov[1].iov_len = buf_data_size;
+ iov[0].iov_base = NULL;
+ iov[0].iov_len = 0;
+ iov[1].iov_base = buf;
+ iov[1].iov_len = sizeof(struct smb2_transform_hdr);
+ iov[2].iov_base = buf + sizeof(struct smb2_transform_hdr);
+ iov[2].iov_len = buf_data_size;
rqst.rq_iov = iov;
- rqst.rq_nvec = 2;
+ rqst.rq_nvec = 3;
rqst.rq_pages = pages;
rqst.rq_npages = npages;
rqst.rq_pagesz = PAGE_SIZE;
@@ -2349,10 +2369,9 @@ decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
if (rc)
return rc;
- memmove(buf + server->vals->header_preamble_size, iov[1].iov_base, buf_data_size);
- hdr = (struct smb2_hdr *)buf;
- hdr->smb2_buf_length = cpu_to_be32(buf_data_size + page_data_size);
- server->total_read = buf_data_size + page_data_size + server->vals->header_preamble_size;
+ memmove(buf + server->vals->header_preamble_size, iov[2].iov_base, buf_data_size);
+
+ server->total_read = buf_data_size + page_data_size;
return rc;
}
@@ -3106,8 +3125,8 @@ struct smb_version_values smb20_values = {
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
- .header_size = sizeof(struct smb2_hdr),
- .header_preamble_size = 4,
+ .header_size = sizeof(struct smb2_sync_hdr),
+ .header_preamble_size = 0,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
@@ -3127,8 +3146,8 @@ struct smb_version_values smb21_values = {
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
- .header_size = sizeof(struct smb2_hdr),
- .header_preamble_size = 4,
+ .header_size = sizeof(struct smb2_sync_hdr),
+ .header_preamble_size = 0,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
@@ -3148,8 +3167,8 @@ struct smb_version_values smb3any_values = {
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
- .header_size = sizeof(struct smb2_hdr),
- .header_preamble_size = 4,
+ .header_size = sizeof(struct smb2_sync_hdr),
+ .header_preamble_size = 0,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
@@ -3169,8 +3188,8 @@ struct smb_version_values smbdefault_values = {
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
- .header_size = sizeof(struct smb2_hdr),
- .header_preamble_size = 4,
+ .header_size = sizeof(struct smb2_sync_hdr),
+ .header_preamble_size = 0,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
@@ -3190,8 +3209,8 @@ struct smb_version_values smb30_values = {
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
- .header_size = sizeof(struct smb2_hdr),
- .header_preamble_size = 4,
+ .header_size = sizeof(struct smb2_sync_hdr),
+ .header_preamble_size = 0,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
@@ -3211,8 +3230,8 @@ struct smb_version_values smb302_values = {
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
- .header_size = sizeof(struct smb2_hdr),
- .header_preamble_size = 4,
+ .header_size = sizeof(struct smb2_sync_hdr),
+ .header_preamble_size = 0,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
@@ -3233,8 +3252,8 @@ struct smb_version_values smb311_values = {
.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
- .header_size = sizeof(struct smb2_hdr),
- .header_preamble_size = 4,
+ .header_size = sizeof(struct smb2_sync_hdr),
+ .header_preamble_size = 0,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index d7f394c41c0d..be18e653ecca 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -689,7 +689,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
server->capabilities |= SMB2_NT_FIND | SMB2_LARGE_FILES;
security_blob = smb2_get_data_area_len(&blob_offset, &blob_length,
- &rsp->hdr);
+ get_sync_hdr(&rsp->hdr));
/*
* See MS-SMB2 section 2.2.4: if no blob, client picks default which
* for us will be
@@ -1990,7 +1990,6 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
{
struct smb2_ioctl_req *req;
struct smb2_ioctl_rsp *rsp;
- struct smb2_sync_hdr *shdr;
struct cifs_ses *ses;
struct kvec iov[2];
struct kvec rsp_iov;
@@ -2111,7 +2110,7 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
goto ioctl_exit;
}
- if (get_rfc1002_length(rsp) < le32_to_cpu(rsp->OutputOffset) + *plen) {
+ if (rsp_iov.iov_len < le32_to_cpu(rsp->OutputOffset) + *plen) {
cifs_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
le32_to_cpu(rsp->OutputOffset));
*plen = 0;
@@ -2125,8 +2124,7 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
goto ioctl_exit;
}
- shdr = get_sync_hdr(rsp);
- memcpy(*out_data, (char *)shdr + le32_to_cpu(rsp->OutputOffset), *plen);
+ memcpy(*out_data, (char *)rsp + le32_to_cpu(rsp->OutputOffset), *plen);
ioctl_exit:
free_rsp_buf(resp_buftype, rsp);
return rc;
@@ -2800,7 +2798,6 @@ SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
int resp_buftype, rc = -EACCES;
struct smb2_read_plain_req *req = NULL;
struct smb2_read_rsp *rsp = NULL;
- struct smb2_sync_hdr *shdr;
struct kvec iov[1];
struct kvec rsp_iov;
unsigned int total_len;
@@ -2841,10 +2838,8 @@ SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
*nbytes = 0;
}
- shdr = get_sync_hdr(rsp);
-
if (*buf) {
- memcpy(*buf, (char *)shdr + rsp->DataOffset, *nbytes);
+ memcpy(*buf, (char *)rsp + rsp->DataOffset, *nbytes);
free_rsp_buf(resp_buftype, rsp_iov.iov_base);
} else if (resp_buftype != CIFS_NO_BUFFER) {
*buf = rsp_iov.iov_base;
@@ -3271,10 +3266,9 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
cifs_buf_release(srch_inf->ntwrk_buf_start);
}
srch_inf->ntwrk_buf_start = (char *)rsp;
- srch_inf->srch_entries_start = srch_inf->last_entry = 4 /* rfclen */ +
- (char *)&rsp->hdr + le16_to_cpu(rsp->OutputBufferOffset);
- /* 4 for rfc1002 length field */
- end_of_smb = get_rfc1002_length(rsp) + 4 + (char *)&rsp->hdr;
+ srch_inf->srch_entries_start = srch_inf->last_entry =
+ (char *)rsp + le16_to_cpu(rsp->OutputBufferOffset);
+ end_of_smb = rsp_iov.iov_len + (char *)rsp;
srch_inf->entries_in_buffer =
num_entries(srch_inf->srch_entries_start, end_of_smb,
&srch_inf->last_entry, info_buf_size);
@@ -3510,7 +3504,7 @@ SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
__u8 oplock_level)
{
int rc;
- struct smb2_oplock_break_req *req = NULL;
+ struct smb2_oplock_break *req = NULL;
struct cifs_ses *ses = tcon->ses;
int flags = CIFS_OBREAK_OP;
unsigned int total_len;
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 6093e5142b2b..d8d9eb73e216 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -123,24 +123,18 @@ struct smb2_sync_pdu {
} __packed;
struct smb2_hdr {
- __be32 smb2_buf_length; /* big endian on wire */
- /* length is only two or three bytes - with */
- /* one or two byte type preceding it that MBZ */
- struct smb2_sync_hdr sync_hdr;
+ struct smb2_sync_hdr sync_hdr;
} __packed;
struct smb2_pdu {
- struct smb2_hdr hdr;
- __le16 StructureSize2; /* size of wct area (varies, request specific) */
+ struct smb2_hdr hdr;
+ __le16 StructureSize2; /* size of wct area (varies, request specific) */
} __packed;
#define SMB3_AES128CMM_NONCE 11
#define SMB3_AES128GCM_NONCE 12
struct smb2_transform_hdr {
- __be32 smb2_buf_length; /* big endian on wire */
- /* length is only two or three bytes - with
- one or two byte type preceding it that MBZ */
__le32 ProtocolId; /* 0xFD 'S' 'M' 'B' */
__u8 Signature[16];
__u8 Nonce[16];
@@ -1154,8 +1148,7 @@ struct smb2_set_info_rsp {
__le16 StructureSize; /* Must be 2 */
} __packed;
-/* oplock break without an rfc1002 header */
-struct smb2_oplock_break_req {
+struct smb2_oplock_break {
struct smb2_sync_hdr sync_hdr;
__le16 StructureSize; /* Must be 24 */
__u8 OplockLevel;
@@ -1165,17 +1158,6 @@ struct smb2_oplock_break_req {
__u64 VolatileFid;
} __packed;
-/* oplock break with an rfc1002 header */
-struct smb2_oplock_break_rsp {
- struct smb2_hdr hdr;
- __le16 StructureSize; /* Must be 24 */
- __u8 OplockLevel;
- __u8 Reserved;
- __le32 Reserved2;
- __u64 PersistentFid;
- __u64 VolatileFid;
-} __packed;
-
#define SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED cpu_to_le32(0x01)
struct smb2_lease_break {
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index 8ba24a95db71..30cdc0aa4e8e 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -37,7 +37,8 @@ extern int map_smb2_to_linux_error(char *buf, bool log_err);
extern int smb2_check_message(char *buf, unsigned int length,
struct TCP_Server_Info *server);
extern unsigned int smb2_calc_size(void *buf);
-extern char *smb2_get_data_area_len(int *off, int *len, struct smb2_hdr *hdr);
+extern char *smb2_get_data_area_len(int *off, int *len,
+ struct smb2_sync_hdr *shdr);
extern __le16 *cifs_convert_path_to_utf16(const char *from,
struct cifs_sb_info *cifs_sb);
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index 8806f3f76c1d..8372a0cecdb0 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -480,7 +480,7 @@ smb2_verify_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
unsigned int rc;
char server_response_sig[16];
struct smb2_sync_hdr *shdr =
- (struct smb2_sync_hdr *)rqst->rq_iov[1].iov_base;
+ (struct smb2_sync_hdr *)rqst->rq_iov[0].iov_base;
if ((shdr->Command == SMB2_NEGOTIATE) ||
(shdr->Command == SMB2_SESSION_SETUP) ||
@@ -604,15 +604,13 @@ int
smb2_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server,
bool log_error)
{
- unsigned int len = mid->resp_buf_size;
- struct kvec iov[2];
+ unsigned int len = server->total_read;
+ struct kvec iov[1];
struct smb_rqst rqst = { .rq_iov = iov,
- .rq_nvec = 2 };
+ .rq_nvec = 1 };
iov[0].iov_base = (char *)mid->resp_buf;
- iov[0].iov_len = 4;
- iov[1].iov_base = (char *)mid->resp_buf + 4;
- iov[1].iov_len = len;
+ iov[0].iov_len = mid->resp_buf_size;
dump_smb(mid->resp_buf, min_t(u32, 80, len));
/* convert the length into a more usable form */
--
2.13.3
--
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