@@ -468,6 +468,7 @@ struct smb_version_values {
__u32 exclusive_lock_type;
__u32 shared_lock_type;
__u32 unlock_lock_type;
+ size_t header_preamble_size;
size_t header_size;
size_t max_header_size;
size_t read_rsp_size;
@@ -1454,7 +1454,8 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
unsigned int data_offset, data_len;
struct cifs_readdata *rdata = mid->callback_data;
char *buf = server->smallbuf;
- unsigned int buflen = get_rfc1002_length(buf) + 4;
+ unsigned int buflen = get_rfc1002_length(buf) +
+ server->vals->header_preamble_size;
bool use_rdma_mr = false;
cifs_dbg(FYI, "%s: mid=%llu offset=%llu bytes=%u\n",
@@ -1504,7 +1505,8 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
return cifs_readv_discard(server, mid);
}
- data_offset = server->ops->read_data_offset(buf) + 4;
+ data_offset = server->ops->read_data_offset(buf) +
+ server->vals->header_preamble_size;
if (data_offset < server->total_read) {
/*
* win2k8 sometimes sends an offset of 0 when the read
@@ -775,7 +775,8 @@ standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
unsigned int pdu_length = get_rfc1002_length(buf);
/* make sure this will fit in a large buffer */
- if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
+ if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) -
+ server->vals->header_preamble_size) {
cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length);
cifs_reconnect(server);
wake_up(&server->response_q);
@@ -791,7 +792,9 @@ standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
/* now read the rest */
length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
- pdu_length - HEADER_SIZE(server) + 1 + 4);
+ pdu_length - HEADER_SIZE(server) + 1
+ + server->vals->header_preamble_size);
+
if (length < 0)
return length;
server->total_read += length;
@@ -884,7 +887,8 @@ cifs_demultiplex_thread(void *p)
continue;
/* make sure we have enough to get to the MID */
- if (pdu_length < HEADER_SIZE(server) - 1 - 4) {
+ if (pdu_length < HEADER_SIZE(server) - 1 -
+ server->vals->header_preamble_size) {
cifs_dbg(VFS, "SMB response too short (%u bytes)\n",
pdu_length);
cifs_reconnect(server);
@@ -893,8 +897,10 @@ cifs_demultiplex_thread(void *p)
}
/* read down to the MID */
- length = cifs_read_from_socket(server, buf + 4,
- HEADER_SIZE(server) - 1 - 4);
+ length = cifs_read_from_socket(server,
+ buf + server->vals->header_preamble_size,
+ HEADER_SIZE(server) - 1
+ - server->vals->header_preamble_size);
if (length < 0)
continue;
server->total_read += length;
@@ -1122,6 +1122,7 @@ struct smb_version_values smb1_values = {
.exclusive_lock_type = 0,
.shared_lock_type = LOCKING_ANDX_SHARED_LOCK,
.unlock_lock_type = 0,
+ .header_preamble_size = 4,
.header_size = sizeof(struct smb_hdr),
.max_header_size = MAX_CIFS_HDR_SIZE,
.read_rsp_size = sizeof(READ_RSP),
@@ -150,7 +150,8 @@ smb2_check_message(char *buf, unsigned int length, struct TCP_Server_Info *srvr)
}
return 1;
}
- if (len > CIFSMaxBufSize + MAX_SMB2_HDR_SIZE - 4) {
+ if (len > CIFSMaxBufSize + MAX_SMB2_HDR_SIZE -
+ srvr->vals->header_preamble_size) {
cifs_dbg(VFS, "SMB length greater than maximum, mid=%llu\n",
mid);
return 1;
@@ -189,26 +190,26 @@ smb2_check_message(char *buf, unsigned int length, struct TCP_Server_Info *srvr)
}
}
- if (4 + len != length) {
+ if (srvr->vals->header_preamble_size + len != length) {
cifs_dbg(VFS, "Total length %u RFC1002 length %u mismatch mid %llu\n",
- length, 4 + len, mid);
+ length, srvr->vals->header_preamble_size + len, mid);
return 1;
}
clc_len = smb2_calc_size(hdr);
- if (4 + len != clc_len) {
+ if (srvr->vals->header_preamble_size + len != clc_len) {
cifs_dbg(FYI, "Calculated size %u length %u mismatch mid %llu\n",
- clc_len, 4 + len, mid);
+ clc_len, srvr->vals->header_preamble_size + len, mid);
/* create failed on symlink */
if (command == SMB2_CREATE_HE &&
shdr->Status == STATUS_STOPPED_ON_SYMLINK)
return 0;
/* Windows 7 server returns 24 bytes more */
- if (clc_len + 20 == len && command == SMB2_OPLOCK_BREAK_HE)
+ if (clc_len + 24 - srvr->vals->header_preamble_size == len && command == SMB2_OPLOCK_BREAK_HE)
return 0;
/* server can return one byte more due to implied bcc[0] */
- if (clc_len == 4 + len + 1)
+ if (clc_len == srvr->vals->header_preamble_size + len + 1)
return 0;
/*
@@ -218,10 +219,10 @@ smb2_check_message(char *buf, unsigned int length, struct TCP_Server_Info *srvr)
* Log the server error (once), but allow it and continue
* since the frame is parseable.
*/
- if (clc_len < 4 /* RFC1001 header size */ + len) {
+ if (clc_len < srvr->vals->header_preamble_size /* RFC1001 header size */ + len) {
printk_once(KERN_WARNING
"SMB2 server sent bad RFC1001 len %d not %d\n",
- len, clc_len - 4);
+ len, clc_len - srvr->vals->header_preamble_size);
return 0;
}
@@ -1457,6 +1457,8 @@ 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);
@@ -1479,7 +1481,7 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
}
if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
- get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
+ get_rfc1002_length(err_buf) + server->vals->header_preamble_size < SMB2_SYMLINK_STRUCT_SIZE) {
kfree(utf16_path);
return -ENOENT;
}
@@ -1492,13 +1494,13 @@ 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 (get_rfc1002_length(err_buf) + 4 <
+ if (get_rfc1002_length(err_buf) + server->vals->header_preamble_size <
SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
kfree(utf16_path);
return -ENOENT;
}
- if (get_rfc1002_length(err_buf) + 4 <
+ if (get_rfc1002_length(err_buf) + server->vals->header_preamble_size <
SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
kfree(utf16_path);
return -ENOENT;
@@ -2050,7 +2052,8 @@ smb2_dir_needs_close(struct cifsFileInfo *cfile)
}
static void
-fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, struct smb_rqst *old_rq)
+fill_transform_hdr(struct TCP_Server_Info *server,
+ struct smb2_transform_hdr *tr_hdr, struct smb_rqst *old_rq)
{
struct smb2_sync_hdr *shdr =
(struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
@@ -2062,7 +2065,7 @@ fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, struct smb_rqst *old_rq)
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) - 4);
+ inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - server->vals->header_preamble_size);
inc_rfc1001_len(tr_hdr, orig_len);
}
@@ -2134,7 +2137,7 @@ 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) - 24;
+ unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20 - server->vals->header_preamble_size;
int rc = 0;
struct scatterlist *sg;
u8 sign[SMB2_SIGNATURE_SIZE] = {};
@@ -2262,7 +2265,7 @@ smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
goto err_free_iov;
/* fill the 1st iov with a transform header */
- fill_transform_hdr(tr_hdr, old_rq);
+ 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);
@@ -2344,10 +2347,10 @@ decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
if (rc)
return rc;
- memmove(buf + 4, iov[1].iov_base, buf_data_size);
+ 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 + 4;
+ server->total_read = buf_data_size + page_data_size + server->vals->header_preamble_size;
return rc;
}
@@ -2451,7 +2454,7 @@ handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
return 0;
}
- data_offset = server->ops->read_data_offset(buf) + 4;
+ data_offset = server->ops->read_data_offset(buf) + server->vals->header_preamble_size;
#ifdef CONFIG_CIFS_SMB_DIRECT
use_rdma_mr = rdata->mr;
#endif
@@ -2547,11 +2550,12 @@ 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 = get_rfc1002_length(buf) + 4;
+ unsigned int buflen = get_rfc1002_length(buf) + server->vals->header_preamble_size;
int rc;
int i = 0;
- len = min_t(unsigned int, buflen, server->vals->read_rsp_size - 4 +
+ len = min_t(unsigned int, buflen, server->vals->read_rsp_size -
+ server->vals->header_preamble_size +
sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
@@ -2559,8 +2563,9 @@ 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) + 4 -
- server->vals->read_rsp_size;
+ len = le32_to_cpu(tr_hdr->OriginalMessageSize) +
+ server->vals->header_preamble_size -
+ server->vals->read_rsp_size;
npages = DIV_ROUND_UP(len, PAGE_SIZE);
pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
@@ -2586,7 +2591,8 @@ 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 - 4,
+ rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size -
+ server->vals->header_preamble_size,
pages, npages, len);
if (rc)
goto free_pages;
@@ -2623,7 +2629,7 @@ 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 + 4 > MAX_CIFS_SMALL_BUFFER_SIZE) {
+ if (pdu_length + server->vals->header_preamble_size > MAX_CIFS_SMALL_BUFFER_SIZE) {
server->large_buf = true;
memcpy(server->bigbuf, buf, server->total_read);
buf = server->bigbuf;
@@ -2631,12 +2637,13 @@ 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 + 4);
+ pdu_length - HEADER_SIZE(server) + 1 +
+ server->vals->header_preamble_size);
if (length < 0)
return length;
server->total_read += length;
- buf_size = pdu_length + 4 - sizeof(struct smb2_transform_hdr);
+ buf_size = pdu_length + server->vals->header_preamble_size - sizeof(struct smb2_transform_hdr);
length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
if (length)
return length;
@@ -2665,7 +2672,7 @@ 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 + 4 < sizeof(struct smb2_transform_hdr) +
+ if (pdu_length + server->vals->header_preamble_size < sizeof(struct smb2_transform_hdr) +
sizeof(struct smb2_sync_hdr)) {
cifs_dbg(VFS, "Transform message is too small (%u)\n",
pdu_length);
@@ -2674,14 +2681,14 @@ smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
return -ECONNABORTED;
}
- if (pdu_length + 4 < orig_len + sizeof(struct smb2_transform_hdr)) {
+ if (pdu_length + server->vals->header_preamble_size < 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 + 4 > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
+ if (pdu_length + server->vals->header_preamble_size > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
return receive_encrypted_read(server, mid);
return receive_encrypted_standard(server, mid);
@@ -2692,7 +2699,8 @@ 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, get_rfc1002_length(buf) + 4,
+ return handle_read_data(server, mid, buf, get_rfc1002_length(buf) +
+ server->vals->header_preamble_size,
NULL, 0, 0);
}
@@ -3097,6 +3105,7 @@ struct smb_version_values smb20_values = {
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
.header_size = sizeof(struct smb2_hdr),
+ .header_preamble_size = 4,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
@@ -3117,6 +3126,7 @@ struct smb_version_values smb21_values = {
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
.header_size = sizeof(struct smb2_hdr),
+ .header_preamble_size = 4,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
@@ -3137,6 +3147,7 @@ struct smb_version_values smb3any_values = {
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
.header_size = sizeof(struct smb2_hdr),
+ .header_preamble_size = 4,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
@@ -3157,6 +3168,7 @@ struct smb_version_values smbdefault_values = {
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
.header_size = sizeof(struct smb2_hdr),
+ .header_preamble_size = 4,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
@@ -3177,6 +3189,7 @@ struct smb_version_values smb30_values = {
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
.header_size = sizeof(struct smb2_hdr),
+ .header_preamble_size = 4,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
@@ -3197,6 +3210,7 @@ struct smb_version_values smb302_values = {
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
.header_size = sizeof(struct smb2_hdr),
+ .header_preamble_size = 4,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
@@ -3218,6 +3232,7 @@ struct smb_version_values smb311_values = {
.shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
.header_size = sizeof(struct smb2_hdr),
+ .header_preamble_size = 4,
.max_header_size = MAX_SMB2_HDR_SIZE,
.read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
.lock_cmd = SMB2_LOCK,
@@ -1466,7 +1466,7 @@ parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
unsigned int remaining;
char *name;
- data_offset = (char *)rsp + 4 + le32_to_cpu(rsp->CreateContextsOffset);
+ data_offset = (char *)rsp + server->vals->header_preamble_size + le32_to_cpu(rsp->CreateContextsOffset);
remaining = le32_to_cpu(rsp->CreateContextsLength);
cc = (struct create_context *)data_offset;
while (remaining >= sizeof(struct create_context)) {
@@ -3469,7 +3469,7 @@ 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 - 4);
+ outbuf_len + sizeof(struct smb2_query_info_rsp) - 1 - server->vals->header_preamble_size);
iov->iov_base = (char *)req;
iov->iov_len = total_len;
@@ -3506,7 +3506,7 @@ 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 *)(4 /* RFC1001 len */ +
+ info = (struct smb2_fs_full_size_info *)(server->vals->header_preamble_size +
le16_to_cpu(rsp->OutputBufferOffset) + (char *)&rsp->hdr);
rc = validate_buf(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength), &rsp->hdr,
@@ -3569,15 +3569,15 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
goto qfsattr_exit;
if (level == FS_ATTRIBUTE_INFORMATION)
- memcpy(&tcon->fsAttrInfo, 4 /* RFC1001 len */ + offset
+ memcpy(&tcon->fsAttrInfo, server->vals->header_preamble_size + offset
+ (char *)&rsp->hdr, min_t(unsigned int,
rsp_len, max_len));
else if (level == FS_DEVICE_INFORMATION)
- memcpy(&tcon->fsDevInfo, 4 /* RFC1001 len */ + offset
+ memcpy(&tcon->fsDevInfo, server->vals->header_preamble_size + offset
+ (char *)&rsp->hdr, sizeof(FILE_SYSTEM_DEVICE_INFO));
else if (level == FS_SECTOR_SIZE_INFORMATION) {
struct smb3_fs_ss_info *ss_info = (struct smb3_fs_ss_info *)
- (4 /* RFC1001 len */ + offset + (char *)&rsp->hdr);
+ (server->vals->header_preamble_size + offset + (char *)&rsp->hdr);
tcon->ss_flags = le32_to_cpu(ss_info->Flags);
tcon->perf_sector_size =
le32_to_cpu(ss_info->PhysicalBytesPerSectorForPerf);
@@ -790,7 +790,8 @@ cifs_send_recv(const unsigned int xid, struct cifs_ses *ses,
buf = (char *)midQ->resp_buf;
resp_iov->iov_base = buf;
- resp_iov->iov_len = get_rfc1002_length(buf) + 4;
+ resp_iov->iov_len = get_rfc1002_length(buf) +
+ ses->server->vals->header_preamble_size;
if (midQ->large_buf)
*resp_buf_type = CIFS_LARGE_BUFFER;
else
This variable is set to 4 for all protocol versions and replaces the hardcoded constant 4 throughought the code. This will later be updated to reflect whether a response packet has a 4 byte length preamble or not once we start removing this field from the SMB2+ dialects. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> --- fs/cifs/cifsglob.h | 1 + fs/cifs/cifssmb.c | 6 ++++-- fs/cifs/connect.c | 16 ++++++++++----- fs/cifs/smb1ops.c | 1 + fs/cifs/smb2misc.c | 19 +++++++++-------- fs/cifs/smb2ops.c | 59 +++++++++++++++++++++++++++++++++-------------------- fs/cifs/smb2pdu.c | 12 +++++------ fs/cifs/transport.c | 3 ++- 8 files changed, 72 insertions(+), 45 deletions(-)