From: Ronnie Sahlberg <lsahlber@redhat.com>
Date: Mon, 9 Apr 2018 18:06:26 +1000
Subject: [PATCH] cifs: add pdu_size to the TCP_Server_Info structure
Git-commit: 2e96467d9eb189b38954bcbbf1ee16762914f4cb
Patch-mainline: v4.17-rc1
References: bsc#1144333
and get rid of some get_rfc1002_length() in smb2
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Acked-by: Aurelien Aptel <aaptel@suse.com>
---
fs/cifs/cifsglob.h | 2 ++
fs/cifs/cifssmb.c | 2 +-
fs/cifs/connect.c | 3 ++-
fs/cifs/smb2ops.c | 8 ++++----
4 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 56fee0330afc..5c1568ccd67d 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -665,6 +665,8 @@ struct TCP_Server_Info {
struct delayed_work echo; /* echo ping workqueue job */
char *smallbuf; /* pointer to current "small" buffer */
char *bigbuf; /* pointer to current "big" buffer */
+ /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
+ unsigned int pdu_size;
unsigned int total_read; /* total amount of data read in this pass */
#ifdef CONFIG_CIFS_FSCACHE
struct fscache_cookie *fscache; /* client index cache cookie */
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index abdc93d4fee8..890b3a40c79c 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -1456,7 +1456,7 @@ 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) +
+ unsigned int buflen = server->pdu_size +
server->vals->header_preamble_size;
bool use_rdma_mr = false;
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 4e0808f40195..48012a0addf1 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -772,7 +772,7 @@ standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
{
int length;
char *buf = server->smallbuf;
- unsigned int pdu_length = get_rfc1002_length(buf);
+ unsigned int pdu_length = server->pdu_size;
/* make sure this will fit in a large buffer */
if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) -
@@ -881,6 +881,7 @@ cifs_demultiplex_thread(void *p)
* so we can now interpret the length field.
*/
pdu_length = get_rfc1002_length(buf);
+ server->pdu_size = pdu_length;
cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length);
if (!is_smb_response(server, buf[0]))
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 968b1d43a1ea..def84fed3571 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -2550,7 +2550,7 @@ 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) + server->vals->header_preamble_size;
+ unsigned int buflen = server->pdu_size + server->vals->header_preamble_size;
int rc;
int i = 0;
@@ -2624,7 +2624,7 @@ receive_encrypted_standard(struct TCP_Server_Info *server,
{
int length;
char *buf = server->smallbuf;
- unsigned int pdu_length = get_rfc1002_length(buf);
+ unsigned int pdu_length = server->pdu_size;
unsigned int buf_size;
struct mid_q_entry *mid_entry;
@@ -2668,7 +2668,7 @@ static int
smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
{
char *buf = server->smallbuf;
- unsigned int pdu_length = get_rfc1002_length(buf);
+ unsigned int pdu_length = server->pdu_size;
struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
@@ -2699,7 +2699,7 @@ 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, get_rfc1002_length(buf) +
+ return handle_read_data(server, mid, buf, server->pdu_size +
server->vals->header_preamble_size,
NULL, 0, 0);
}
--
2.16.4