ksmbd: add support for SMB3 multichannel
Add support for SMB3 multichannel. It will be enable by setting
'server multi channel support = yes' in smb.conf.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
diff --git a/fs/cifsd/smb2pdu.c b/fs/cifsd/smb2pdu.c
index ac15a92..12c954d 100644
--- a/fs/cifsd/smb2pdu.c
+++ b/fs/cifsd/smb2pdu.c
@@ -64,21 +64,21 @@ static inline int check_session_id(struct ksmbd_conn *conn, u64 id)
if (id == 0 || id == -1)
return 0;
- sess = ksmbd_session_lookup(conn, id);
+ sess = ksmbd_session_lookup_all(conn, id);
if (sess)
return 1;
ksmbd_err("Invalid user session id: %llu\n", id);
return 0;
}
-struct channel *lookup_chann_list(struct ksmbd_session *sess)
+struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
{
struct channel *chann;
struct list_head *t;
list_for_each(t, &sess->ksmbd_chann_list) {
chann = list_entry(t, struct channel, chann_list);
- if (chann && chann->conn == sess->conn)
+ if (chann && chann->conn == conn)
return chann;
}
@@ -600,7 +600,7 @@ int smb2_check_user_session(struct ksmbd_work *work)
sess_id = le64_to_cpu(req_hdr->SessionId);
/* Check for validity of user session */
- work->sess = ksmbd_session_lookup(conn, sess_id);
+ work->sess = ksmbd_session_lookup_all(conn, sess_id);
if (work->sess)
return 1;
ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
@@ -1165,18 +1165,30 @@ static int generate_preauth_hash(struct ksmbd_work *work)
{
struct ksmbd_conn *conn = work->conn;
struct ksmbd_session *sess = work->sess;
+ u8 *preauth_hash;
if (conn->dialect != SMB311_PROT_ID)
return 0;
- if (!sess->Preauth_HashValue) {
- if (alloc_preauth_hash(sess, conn))
- return -ENOMEM;
+ if (conn->binding) {
+ struct preauth_session *preauth_sess;
+
+ preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
+ if (!preauth_sess) {
+ preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
+ if (!preauth_sess)
+ return -ENOMEM;
+ }
+
+ preauth_hash = preauth_sess->Preauth_HashValue;
+ } else {
+ if (!sess->Preauth_HashValue)
+ if (alloc_preauth_hash(sess, conn))
+ return -ENOMEM;
+ preauth_hash = sess->Preauth_HashValue;
}
- ksmbd_gen_preauth_integrity_hash(conn,
- work->request_buf,
- sess->Preauth_HashValue);
+ ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
return 0;
}
@@ -1383,15 +1395,19 @@ static int ntlm_authenticate(struct ksmbd_work *work)
* that it is reauthentication. And the user/password
* has been verified, so return it here.
*/
- if (sess->state == SMB2_SESSION_VALID)
+ if (sess->state == SMB2_SESSION_VALID) {
+ if (conn->binding)
+ goto binding_session;
return 0;
+ }
if ((conn->sign || server_conf.enforced_signing) ||
(req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
sess->sign = true;
if (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION &&
- conn->ops->generate_encryptionkey) {
+ conn->ops->generate_encryptionkey &&
+ !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
rc = conn->ops->generate_encryptionkey(sess);
if (rc) {
ksmbd_debug(SMB,
@@ -1409,8 +1425,9 @@ static int ntlm_authenticate(struct ksmbd_work *work)
}
}
+binding_session:
if (conn->dialect >= SMB30_PROT_ID) {
- chann = lookup_chann_list(sess);
+ chann = lookup_chann_list(sess, conn);
if (!chann) {
chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
if (!chann)
@@ -1423,7 +1440,7 @@ static int ntlm_authenticate(struct ksmbd_work *work)
}
if (conn->ops->generate_signingkey) {
- rc = conn->ops->generate_signingkey(sess);
+ rc = conn->ops->generate_signingkey(sess, conn);
if (rc) {
ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
rsp->hdr.Status = STATUS_LOGON_FAILURE;
@@ -1500,7 +1517,7 @@ static int krb5_authenticate(struct ksmbd_work *work)
}
if (conn->dialect >= SMB30_PROT_ID) {
- chann = lookup_chann_list(sess);
+ chann = lookup_chann_list(sess, conn);
if (!chann) {
chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
if (!chann)
@@ -1513,7 +1530,7 @@ static int krb5_authenticate(struct ksmbd_work *work)
}
if (conn->ops->generate_signingkey) {
- retval = conn->ops->generate_signingkey(sess);
+ retval = conn->ops->generate_signingkey(sess, conn);
if (retval) {
ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
rsp->hdr.Status = STATUS_LOGON_FAILURE;
@@ -1562,12 +1579,59 @@ int smb2_sess_setup(struct ksmbd_work *work)
}
rsp->hdr.SessionId = cpu_to_le64(sess->id);
ksmbd_session_register(conn, sess);
+ } else if (conn->dialect >= SMB30_PROT_ID &&
+ (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
+ req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
+ u64 sess_id = le64_to_cpu(req->hdr.SessionId);
+
+ sess = ksmbd_session_lookup_slowpath(sess_id);
+ if (!sess) {
+ rc = -ENOENT;
+ goto out_err;
+ }
+
+ if (conn->dialect != sess->conn->dialect) {
+ rc = -EINVAL;
+ goto out_err;
+ }
+
+ if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
+ rc = -EINVAL;
+ goto out_err;
+ }
+
+ if (strncmp(conn->ClientGUID, sess->conn->ClientGUID,
+ SMB2_CLIENT_GUID_SIZE)) {
+ rc = -ENOENT;
+ goto out_err;
+ }
+
+ if (sess->state == SMB2_SESSION_IN_PROGRESS) {
+ rc = -EACCES;
+ goto out_err;
+ }
+
+ if (sess->state == SMB2_SESSION_EXPIRED) {
+ rc = -EFAULT;
+ goto out_err;
+ }
+
+ if (ksmbd_session_lookup(conn, sess_id)) {
+ rc = -EACCES;
+ goto out_err;
+ }
+
+ conn->binding = true;
+ } else if ((conn->dialect < SMB30_PROT_ID ||
+ server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
+ (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
+ rc = -EACCES;
+ goto out_err;
} else {
sess = ksmbd_session_lookup(conn,
le64_to_cpu(req->hdr.SessionId));
if (!sess) {
rc = -ENOENT;
- rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
goto out_err;
}
}
@@ -1585,15 +1649,15 @@ int smb2_sess_setup(struct ksmbd_work *work)
}
if (server_conf.auth_mechs & conn->auth_mechs) {
+ rc = generate_preauth_hash(work);
+ if (rc)
+ goto out_err;
+
if (conn->preferred_auth_mech &
(KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
- rc = generate_preauth_hash(work);
- if (rc)
- goto out_err;
-
rc = krb5_authenticate(work);
if (rc) {
- rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ rc = -EINVAL;
goto out_err;
}
@@ -1602,10 +1666,6 @@ int smb2_sess_setup(struct ksmbd_work *work)
kfree(sess->Preauth_HashValue);
sess->Preauth_HashValue = NULL;
} else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
- rc = generate_preauth_hash(work);
- if (rc)
- goto out_err;
-
if (negblob->MessageType == NtLmNegotiate) {
rc = ntlm_negotiate(work, negblob);
if (rc)
@@ -1625,6 +1685,16 @@ int smb2_sess_setup(struct ksmbd_work *work)
ksmbd_conn_set_good(work);
sess->state = SMB2_SESSION_VALID;
+ if (conn->binding) {
+ struct preauth_session *preauth_sess;
+
+ preauth_sess =
+ ksmbd_preauth_session_lookup(conn, sess->id);
+ if (preauth_sess) {
+ list_del(&preauth_sess->preauth_entry);
+ kfree(preauth_sess);
+ }
+ }
kfree(sess->Preauth_HashValue);
sess->Preauth_HashValue = NULL;
}
@@ -1632,15 +1702,24 @@ int smb2_sess_setup(struct ksmbd_work *work)
/* TODO: need one more negotiation */
ksmbd_err("Not support the preferred authentication\n");
rc = -EINVAL;
- rsp->hdr.Status = STATUS_INVALID_PARAMETER;
}
} else {
ksmbd_err("Not support authentication\n");
rc = -EINVAL;
- rsp->hdr.Status = STATUS_INVALID_PARAMETER;
}
out_err:
+ if (rc == -EINVAL)
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ else if (rc == -ENOENT)
+ rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
+ else if (rc == -EACCES)
+ rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
+ else if (rc == -EFAULT)
+ rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
+ else if (rc)
+ rsp->hdr.Status = STATUS_LOGON_FAILURE;
+
if (conn->use_spnego && conn->mechToken) {
kfree(conn->mechToken);
conn->mechToken = NULL;
@@ -7883,7 +7962,7 @@ void smb2_set_sign_rsp(struct ksmbd_work *work)
*/
int smb3_check_sign_req(struct ksmbd_work *work)
{
- struct ksmbd_conn *conn;
+ struct ksmbd_conn *conn = work->conn;
char *signing_key;
struct smb2_hdr *hdr, *hdr_org;
struct channel *chann;
@@ -7906,13 +7985,11 @@ int smb3_check_sign_req(struct ksmbd_work *work)
if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
signing_key = work->sess->smb3signingkey;
- conn = work->sess->conn;
} else {
- chann = lookup_chann_list(work->sess);
+ chann = lookup_chann_list(work->sess, conn);
if (!chann)
return 0;
signing_key = chann->smb3signingkey;
- conn = chann->conn;
}
if (!signing_key) {
@@ -7943,7 +8020,7 @@ int smb3_check_sign_req(struct ksmbd_work *work)
*/
void smb3_set_sign_rsp(struct ksmbd_work *work)
{
- struct ksmbd_conn *conn;
+ struct ksmbd_conn *conn = work->conn;
struct smb2_hdr *req_hdr;
struct smb2_hdr *hdr, *hdr_org;
struct channel *chann;
@@ -7970,13 +8047,11 @@ void smb3_set_sign_rsp(struct ksmbd_work *work)
if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
signing_key = work->sess->smb3signingkey;
- conn = work->sess->conn;
} else {
- chann = lookup_chann_list(work->sess);
+ chann = lookup_chann_list(work->sess, work->conn);
if (!chann)
return;
signing_key = chann->smb3signingkey;
- conn = chann->conn;
}
if (!signing_key)
@@ -8020,11 +8095,21 @@ void smb3_preauth_hash_rsp(struct ksmbd_work *work)
ksmbd_gen_preauth_integrity_hash(conn, (char *)rsp,
conn->preauth_info->Preauth_HashValue);
- if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
- sess && sess->state == SMB2_SESSION_IN_PROGRESS) {
+ if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
__u8 *hash_value;
- hash_value = sess->Preauth_HashValue;
+ if (conn->binding) {
+ struct preauth_session *preauth_sess;
+
+ preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
+ if (!preauth_sess)
+ return;
+ hash_value = preauth_sess->Preauth_HashValue;
+ } else {
+ hash_value = sess->Preauth_HashValue;
+ if (!hash_value)
+ return;
+ }
ksmbd_gen_preauth_integrity_hash(conn, (char *)rsp,
hash_value);
}
@@ -8116,7 +8201,7 @@ int smb3_decrypt_req(struct ksmbd_work *work)
unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
int rc = 0;
- sess = ksmbd_session_lookup(conn, le64_to_cpu(tr_hdr->SessionId));
+ sess = ksmbd_session_lookup_all(conn, le64_to_cpu(tr_hdr->SessionId));
if (!sess) {
ksmbd_err("invalid session id(%llx) in transform header\n",
le64_to_cpu(tr_hdr->SessionId));