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path: root/fs/cifs/connect.c
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Diffstat (limited to 'fs/cifs/connect.c')
-rw-r--r--fs/cifs/connect.c90
1 files changed, 46 insertions, 44 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index fa68813396b..20d75b8ddb2 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -379,6 +379,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
try_to_freeze();
/* we should try only the port we connected to before */
+ mutex_lock(&server->srv_mutex);
rc = generic_ip_connect(server);
if (rc) {
cifs_dbg(FYI, "reconnect error %d\n", rc);
@@ -390,6 +391,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
server->tcpStatus = CifsNeedNegotiate;
spin_unlock(&GlobalMid_Lock);
}
+ mutex_unlock(&server->srv_mutex);
} while (server->tcpStatus == CifsNeedReconnect);
return rc;
@@ -1114,7 +1116,7 @@ cifs_parse_smb_version(char *value, struct smb_vol *vol)
break;
#ifdef CONFIG_CIFS_SMB2
case Smb_20:
- vol->ops = &smb21_operations; /* currently identical with 2.1 */
+ vol->ops = &smb20_operations;
vol->vals = &smb20_values;
break;
case Smb_21:
@@ -1575,8 +1577,8 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
if (string == NULL)
goto out_nomem;
- if (strnlen(string, MAX_USERNAME_SIZE) >
- MAX_USERNAME_SIZE) {
+ if (strnlen(string, CIFS_MAX_USERNAME_LEN) >
+ CIFS_MAX_USERNAME_LEN) {
printk(KERN_WARNING "CIFS: username too long\n");
goto cifs_parse_mount_err;
}
@@ -1675,7 +1677,8 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
if (string == NULL)
goto out_nomem;
- if (strnlen(string, 256) == 256) {
+ if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN)
+ == CIFS_MAX_DOMAINNAME_LEN) {
printk(KERN_WARNING "CIFS: domain name too"
" long\n");
goto cifs_parse_mount_err;
@@ -2141,6 +2144,9 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
sizeof(tcp_ses->srcaddr));
memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
sizeof(tcp_ses->dstaddr));
+#ifdef CONFIG_CIFS_SMB2
+ get_random_bytes(tcp_ses->client_guid, SMB2_CLIENT_GUID_SIZE);
+#endif
/*
* at this point we are the only ones with the pointer
* to the struct since the kernel thread not created yet
@@ -2220,13 +2226,13 @@ static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
/* anything else takes username/password */
if (strncmp(ses->user_name,
vol->username ? vol->username : "",
- MAX_USERNAME_SIZE))
+ CIFS_MAX_USERNAME_LEN))
return 0;
- if (strlen(vol->username) != 0 &&
+ if ((vol->username && strlen(vol->username) != 0) &&
ses->password != NULL &&
strncmp(ses->password,
vol->password ? vol->password : "",
- MAX_PASSWORD_SIZE))
+ CIFS_MAX_PASSWORD_LEN))
return 0;
}
return 1;
@@ -2239,6 +2245,8 @@ cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
spin_lock(&cifs_tcp_ses_lock);
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+ if (ses->status == CifsExiting)
+ continue;
if (!match_session(ses, vol))
continue;
++ses->ses_count;
@@ -2252,32 +2260,45 @@ cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
static void
cifs_put_smb_ses(struct cifs_ses *ses)
{
- unsigned int xid;
+ unsigned int rc, xid;
struct TCP_Server_Info *server = ses->server;
cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count);
+
spin_lock(&cifs_tcp_ses_lock);
+ if (ses->status == CifsExiting) {
+ spin_unlock(&cifs_tcp_ses_lock);
+ return;
+ }
if (--ses->ses_count > 0) {
spin_unlock(&cifs_tcp_ses_lock);
return;
}
-
- list_del_init(&ses->smb_ses_list);
+ if (ses->status == CifsGood)
+ ses->status = CifsExiting;
spin_unlock(&cifs_tcp_ses_lock);
- if (ses->status == CifsGood && server->ops->logoff) {
+ if (ses->status == CifsExiting && server->ops->logoff) {
xid = get_xid();
- server->ops->logoff(xid, ses);
+ rc = server->ops->logoff(xid, ses);
+ if (rc)
+ cifs_dbg(VFS, "%s: Session Logoff failure rc=%d\n",
+ __func__, rc);
_free_xid(xid);
}
+
+ spin_lock(&cifs_tcp_ses_lock);
+ list_del_init(&ses->smb_ses_list);
+ spin_unlock(&cifs_tcp_ses_lock);
+
sesInfoFree(ses);
cifs_put_tcp_session(server);
}
#ifdef CONFIG_KEYS
-/* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */
-#define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1)
+/* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */
+#define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1)
/* Populate username and pw fields from keyring if possible */
static int
@@ -2351,7 +2372,7 @@ cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
}
len = delim - payload;
- if (len > MAX_USERNAME_SIZE || len <= 0) {
+ if (len > CIFS_MAX_USERNAME_LEN || len <= 0) {
cifs_dbg(FYI, "Bad value from username search (len=%zd)\n",
len);
rc = -EINVAL;
@@ -2368,7 +2389,7 @@ cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username);
len = key->datalen - (len + 1);
- if (len > MAX_PASSWORD_SIZE || len <= 0) {
+ if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) {
cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len);
rc = -EINVAL;
kfree(vol->username);
@@ -3752,6 +3773,13 @@ CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
return rc;
}
+static void delayed_free(struct rcu_head *p)
+{
+ struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu);
+ unload_nls(sbi->local_nls);
+ kfree(sbi);
+}
+
void
cifs_umount(struct cifs_sb_info *cifs_sb)
{
@@ -3776,8 +3804,7 @@ cifs_umount(struct cifs_sb_info *cifs_sb)
bdi_destroy(&cifs_sb->bdi);
kfree(cifs_sb->mountdata);
- unload_nls(cifs_sb->local_nls);
- kfree(cifs_sb);
+ call_rcu(&cifs_sb->rcu, delayed_free);
}
int
@@ -3825,33 +3852,8 @@ cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
if (server->ops->sess_setup)
rc = server->ops->sess_setup(xid, ses, nls_info);
- if (rc) {
+ if (rc)
cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc);
- } else {
- mutex_lock(&server->srv_mutex);
- if (!server->session_estab) {
- server->session_key.response = ses->auth_key.response;
- server->session_key.len = ses->auth_key.len;
- server->sequence_number = 0x2;
- server->session_estab = true;
- ses->auth_key.response = NULL;
- if (server->ops->generate_signingkey)
- server->ops->generate_signingkey(server);
- }
- mutex_unlock(&server->srv_mutex);
-
- cifs_dbg(FYI, "CIFS Session Established successfully\n");
- spin_lock(&GlobalMid_Lock);
- ses->status = CifsGood;
- ses->need_reconnect = false;
- spin_unlock(&GlobalMid_Lock);
- }
-
- kfree(ses->auth_key.response);
- ses->auth_key.response = NULL;
- ses->auth_key.len = 0;
- kfree(ses->ntlmssp);
- ses->ntlmssp = NULL;
return rc;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 15:28:33 +0000