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Diffstat (limited to 'fs/cifs/smb2pdu.c')
-rw-r--r--fs/cifs/smb2pdu.c168
1 files changed, 112 insertions, 56 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 05149862aea4..ed77f94dbf1d 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -252,7 +252,7 @@ smb2_reconnect(__le16 smb2_command, struct cifs_tcon *tcon)
if (tcon == NULL)
return 0;
- if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL)
+ if (smb2_command == SMB2_TREE_CONNECT)
return 0;
if (tcon->tidStatus == CifsExiting) {
@@ -426,16 +426,9 @@ fill_small_buf(__le16 smb2_command, struct cifs_tcon *tcon, void *buf,
* SMB information in the SMB header. If the return code is zero, this
* function must have filled in request_buf pointer.
*/
-static int
-smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
- void **request_buf, unsigned int *total_len)
+static int __smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
+ void **request_buf, unsigned int *total_len)
{
- int rc;
-
- rc = smb2_reconnect(smb2_command, tcon);
- if (rc)
- return rc;
-
/* BB eventually switch this to SMB2 specific small buf size */
if (smb2_command == SMB2_SET_INFO)
*request_buf = cifs_buf_get();
@@ -456,7 +449,31 @@ smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
cifs_stats_inc(&tcon->num_smbs_sent);
}
- return rc;
+ return 0;
+}
+
+static int smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
+ void **request_buf, unsigned int *total_len)
+{
+ int rc;
+
+ rc = smb2_reconnect(smb2_command, tcon);
+ if (rc)
+ return rc;
+
+ return __smb2_plain_req_init(smb2_command, tcon, request_buf,
+ total_len);
+}
+
+static int smb2_ioctl_req_init(u32 opcode, struct cifs_tcon *tcon,
+ void **request_buf, unsigned int *total_len)
+{
+ /* Skip reconnect only for FSCTL_VALIDATE_NEGOTIATE_INFO IOCTLs */
+ if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) {
+ return __smb2_plain_req_init(SMB2_IOCTL, tcon, request_buf,
+ total_len);
+ }
+ return smb2_plain_req_init(SMB2_IOCTL, tcon, request_buf, total_len);
}
/* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */
@@ -791,7 +808,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
struct kvec rsp_iov;
int rc = 0;
int resp_buftype;
- struct TCP_Server_Info *server = ses->server;
+ struct TCP_Server_Info *server = cifs_ses_server(ses);
int blob_offset, blob_length;
char *security_blob;
int flags = CIFS_NEG_OP;
@@ -813,7 +830,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
memset(server->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
memset(ses->preauth_sha_hash, 0, SMB2_PREAUTH_HASH_SIZE);
- if (strcmp(ses->server->vals->version_string,
+ if (strcmp(server->vals->version_string,
SMB3ANY_VERSION_STRING) == 0) {
req->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
req->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
@@ -829,7 +846,7 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
total_len += 8;
} else {
/* otherwise send specific dialect */
- req->Dialects[0] = cpu_to_le16(ses->server->vals->protocol_id);
+ req->Dialects[0] = cpu_to_le16(server->vals->protocol_id);
req->DialectCount = cpu_to_le16(1);
total_len += 2;
}
@@ -1171,7 +1188,7 @@ SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
int rc;
struct cifs_ses *ses = sess_data->ses;
struct smb2_sess_setup_req *req;
- struct TCP_Server_Info *server = ses->server;
+ struct TCP_Server_Info *server = cifs_ses_server(ses);
unsigned int total_len;
rc = smb2_plain_req_init(SMB2_SESSION_SETUP, NULL, (void **) &req,
@@ -1179,13 +1196,21 @@ SMB2_sess_alloc_buffer(struct SMB2_sess_data *sess_data)
if (rc)
return rc;
- /* First session, not a reauthenticate */
- req->sync_hdr.SessionId = 0;
-
- /* if reconnect, we need to send previous sess id, otherwise it is 0 */
- req->PreviousSessionId = sess_data->previous_session;
-
- req->Flags = 0; /* MBZ */
+ if (sess_data->ses->binding) {
+ req->sync_hdr.SessionId = sess_data->ses->Suid;
+ req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
+ req->PreviousSessionId = 0;
+ req->Flags = SMB2_SESSION_REQ_FLAG_BINDING;
+ } else {
+ /* First session, not a reauthenticate */
+ req->sync_hdr.SessionId = 0;
+ /*
+ * if reconnect, we need to send previous sess id
+ * otherwise it is 0
+ */
+ req->PreviousSessionId = sess_data->previous_session;
+ req->Flags = 0; /* MBZ */
+ }
/* enough to enable echos and oplocks and one max size write */
req->sync_hdr.CreditRequest = cpu_to_le16(130);
@@ -1258,28 +1283,33 @@ SMB2_sess_establish_session(struct SMB2_sess_data *sess_data)
{
int rc = 0;
struct cifs_ses *ses = sess_data->ses;
+ struct TCP_Server_Info *server = cifs_ses_server(ses);
- mutex_lock(&ses->server->srv_mutex);
- if (ses->server->ops->generate_signingkey) {
- rc = ses->server->ops->generate_signingkey(ses);
+ mutex_lock(&server->srv_mutex);
+ if (server->ops->generate_signingkey) {
+ rc = server->ops->generate_signingkey(ses);
if (rc) {
cifs_dbg(FYI,
"SMB3 session key generation failed\n");
- mutex_unlock(&ses->server->srv_mutex);
+ mutex_unlock(&server->srv_mutex);
return rc;
}
}
- if (!ses->server->session_estab) {
- ses->server->sequence_number = 0x2;
- ses->server->session_estab = true;
+ if (!server->session_estab) {
+ server->sequence_number = 0x2;
+ server->session_estab = true;
}
- mutex_unlock(&ses->server->srv_mutex);
+ mutex_unlock(&server->srv_mutex);
cifs_dbg(FYI, "SMB2/3 session established successfully\n");
- spin_lock(&GlobalMid_Lock);
- ses->status = CifsGood;
- ses->need_reconnect = false;
- spin_unlock(&GlobalMid_Lock);
+ /* keep existing ses state if binding */
+ if (!ses->binding) {
+ spin_lock(&GlobalMid_Lock);
+ ses->status = CifsGood;
+ ses->need_reconnect = false;
+ spin_unlock(&GlobalMid_Lock);
+ }
+
return rc;
}
@@ -1317,16 +1347,19 @@ SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
goto out_put_spnego_key;
}
- ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
- GFP_KERNEL);
- if (!ses->auth_key.response) {
- cifs_dbg(VFS,
- "Kerberos can't allocate (%u bytes) memory",
- msg->sesskey_len);
- rc = -ENOMEM;
- goto out_put_spnego_key;
+ /* keep session key if binding */
+ if (!ses->binding) {
+ ses->auth_key.response = kmemdup(msg->data, msg->sesskey_len,
+ GFP_KERNEL);
+ if (!ses->auth_key.response) {
+ cifs_dbg(VFS,
+ "Kerberos can't allocate (%u bytes) memory",
+ msg->sesskey_len);
+ rc = -ENOMEM;
+ goto out_put_spnego_key;
+ }
+ ses->auth_key.len = msg->sesskey_len;
}
- ses->auth_key.len = msg->sesskey_len;
sess_data->iov[1].iov_base = msg->data + msg->sesskey_len;
sess_data->iov[1].iov_len = msg->secblob_len;
@@ -1336,9 +1369,11 @@ SMB2_auth_kerberos(struct SMB2_sess_data *sess_data)
goto out_put_spnego_key;
rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
- ses->Suid = rsp->sync_hdr.SessionId;
-
- ses->session_flags = le16_to_cpu(rsp->SessionFlags);
+ /* keep session id and flags if binding */
+ if (!ses->binding) {
+ ses->Suid = rsp->sync_hdr.SessionId;
+ ses->session_flags = le16_to_cpu(rsp->SessionFlags);
+ }
rc = SMB2_sess_establish_session(sess_data);
out_put_spnego_key:
@@ -1432,9 +1467,11 @@ SMB2_sess_auth_rawntlmssp_negotiate(struct SMB2_sess_data *sess_data)
cifs_dbg(FYI, "rawntlmssp session setup challenge phase\n");
-
- ses->Suid = rsp->sync_hdr.SessionId;
- ses->session_flags = le16_to_cpu(rsp->SessionFlags);
+ /* keep existing ses id and flags if binding */
+ if (!ses->binding) {
+ ses->Suid = rsp->sync_hdr.SessionId;
+ ses->session_flags = le16_to_cpu(rsp->SessionFlags);
+ }
out:
kfree(ntlmssp_blob);
@@ -1491,8 +1528,11 @@ SMB2_sess_auth_rawntlmssp_authenticate(struct SMB2_sess_data *sess_data)
rsp = (struct smb2_sess_setup_rsp *)sess_data->iov[0].iov_base;
- ses->Suid = rsp->sync_hdr.SessionId;
- ses->session_flags = le16_to_cpu(rsp->SessionFlags);
+ /* keep existing ses id and flags if binding */
+ if (!ses->binding) {
+ ses->Suid = rsp->sync_hdr.SessionId;
+ ses->session_flags = le16_to_cpu(rsp->SessionFlags);
+ }
rc = SMB2_sess_establish_session(sess_data);
out:
@@ -1509,7 +1549,7 @@ SMB2_select_sec(struct cifs_ses *ses, struct SMB2_sess_data *sess_data)
{
int type;
- type = smb2_select_sectype(ses->server, ses->sectype);
+ type = smb2_select_sectype(cifs_ses_server(ses), ses->sectype);
cifs_dbg(FYI, "sess setup type %d\n", type);
if (type == Unspecified) {
cifs_dbg(VFS,
@@ -1537,7 +1577,7 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
const struct nls_table *nls_cp)
{
int rc = 0;
- struct TCP_Server_Info *server = ses->server;
+ struct TCP_Server_Info *server = cifs_ses_server(ses);
struct SMB2_sess_data *sess_data;
cifs_dbg(FYI, "Session Setup\n");
@@ -1563,7 +1603,7 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
/*
* Initialize the session hash with the server one.
*/
- memcpy(ses->preauth_sha_hash, ses->server->preauth_sha_hash,
+ memcpy(ses->preauth_sha_hash, server->preauth_sha_hash,
SMB2_PREAUTH_HASH_SIZE);
while (sess_data->func)
@@ -1807,6 +1847,8 @@ SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
if ((tcon->need_reconnect) || (tcon->ses->need_reconnect))
return 0;
+ close_shroot(&tcon->crfid);
+
rc = smb2_plain_req_init(SMB2_TREE_DISCONNECT, tcon, (void **) &req,
&total_len);
if (rc)
@@ -2661,7 +2703,7 @@ SMB2_ioctl_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
int rc;
char *in_data_buf;
- rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len);
+ rc = smb2_ioctl_req_init(opcode, tcon, (void **) &req, &total_len);
if (rc)
return rc;
@@ -2972,7 +3014,21 @@ int
SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid)
{
- return SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0);
+ int rc;
+ int tmp_rc;
+
+ rc = SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0);
+
+ /* retry close in a worker thread if this one is interrupted */
+ if (rc == -EINTR) {
+ tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid,
+ volatile_fid);
+ if (tmp_rc)
+ cifs_dbg(VFS, "handle cancelled close fid 0x%llx returned error %d\n",
+ persistent_fid, tmp_rc);
+ }
+
+ return rc;
}
int
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.