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ksmbd: remove smb2_buf_length in smb2_transform_hdr

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To move smb2_transform_hdr to smbfs_common, This patch remove
smb2_buf_length variable in smb2_transform_hdr.

Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Namjae Jeon 2021-11-03 08:25:54 +09:00 • committed by Steve French
parent cb4517201b
commit 2dd9129f7d
4 changed files with 21 additions and 30 deletions

7
fs/ksmbd/auth.c
View file

@ -983,7 +983,7 @@ static struct scatterlist *ksmbd_init_sg(struct kvec *iov, unsigned int nvec,
u8 *sign)
{
struct scatterlist *sg;
unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
int i, nr_entries[3] = {0}, total_entries = 0, sg_idx = 0;
if (!nvec)
@ -1047,9 +1047,8 @@ static struct scatterlist *ksmbd_init_sg(struct kvec *iov, unsigned int nvec,
int ksmbd_crypt_message(struct ksmbd_conn *conn, struct kvec *iov,
unsigned int nvec, int enc)
{
struct smb2_transform_hdr *tr_hdr =
(struct smb2_transform_hdr *)iov[0].iov_base;
unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
struct smb2_transform_hdr *tr_hdr = smb2_get_msg(iov[0].iov_base);
unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
int rc;
struct scatterlist *sg;
u8 sign[SMB2_SIGNATURE_SIZE] = {};

2
fs/ksmbd/connection.c
View file

@ -171,7 +171,7 @@ int ksmbd_conn_write(struct ksmbd_work *work)
if (work->tr_buf) {
iov[iov_idx] = (struct kvec) { work->tr_buf,
sizeof(struct smb2_transform_hdr) };
sizeof(struct smb2_transform_hdr) + 4 };
len += iov[iov_idx++].iov_len;
}

37
fs/ksmbd/smb2pdu.c
View file

@ -8424,13 +8424,13 @@ void smb3_preauth_hash_rsp(struct ksmbd_work *work)
}
}
static void fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, char *old_buf,
__le16 cipher_type)
static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
{
struct smb2_hdr *hdr = (struct smb2_hdr *)old_buf;
struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
struct smb2_hdr *hdr = smb2_get_msg(old_buf);
unsigned int orig_len = get_rfc1002_len(old_buf);
memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
memset(tr_buf, 0, sizeof(struct smb2_transform_hdr) + 4);
tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
tr_hdr->Flags = cpu_to_le16(0x01);
@ -8440,14 +8440,13 @@ static void fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, char *old_buf,
else
get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - 4);
inc_rfc1001_len(tr_hdr, orig_len);
inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
inc_rfc1001_len(tr_buf, orig_len);
}
int smb3_encrypt_resp(struct ksmbd_work *work)
{
char *buf = work->response_buf;
struct smb2_transform_hdr *tr_hdr;
struct kvec iov[3];
int rc = -ENOMEM;
int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0);
@ -8455,15 +8454,15 @@ int smb3_encrypt_resp(struct ksmbd_work *work)
if (ARRAY_SIZE(iov) < rq_nvec)
return -ENOMEM;
tr_hdr = kzalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
if (!tr_hdr)
work->tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
if (!work->tr_buf)
return rc;
/* fill transform header */
fill_transform_hdr(tr_hdr, buf, work->conn->cipher_type);
fill_transform_hdr(work->tr_buf, buf, work->conn->cipher_type);
iov[0].iov_base = tr_hdr;
iov[0].iov_len = sizeof(struct smb2_transform_hdr);
iov[0].iov_base = work->tr_buf;
iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
buf_size += iov[0].iov_len - 4;
iov[1].iov_base = buf + 4;
@ -8483,15 +8482,14 @@ int smb3_encrypt_resp(struct ksmbd_work *work)
return rc;
memmove(buf, iov[1].iov_base, iov[1].iov_len);
tr_hdr->smb2_buf_length = cpu_to_be32(buf_size);
work->tr_buf = tr_hdr;
*(__be32 *)work->tr_buf = cpu_to_be32(buf_size);
return rc;
}
bool smb3_is_transform_hdr(void *buf)
{
struct smb2_transform_hdr *trhdr = buf;
struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
}
@ -8503,9 +8501,8 @@ int smb3_decrypt_req(struct ksmbd_work *work)
char *buf = work->request_buf;
unsigned int pdu_length = get_rfc1002_len(buf);
struct kvec iov[2];
int buf_data_size = pdu_length + 4 -
sizeof(struct smb2_transform_hdr);
struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
int rc = 0;
if (buf_data_size < sizeof(struct smb2_hdr)) {
@ -8527,8 +8524,8 @@ int smb3_decrypt_req(struct ksmbd_work *work)
}
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[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
iov[1].iov_len = buf_data_size;
rc = ksmbd_crypt_message(conn, iov, 2, 0);
if (rc)

5
fs/ksmbd/smb2pdu.h
View file

@ -159,11 +159,6 @@ struct smb2_pdu {
#define SMB3_AES_GCM_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];