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authorSteve French <stfrench@microsoft.com>2018-07-31 03:23:09 +0300
committerSteve French <stfrench@microsoft.com>2018-08-07 22:20:22 +0300
commitbf1fdeb7899a86adfbe0b521bee5cf78bb870a14 (patch)
treec0acfab8a6baef94288fa47f7bc12f59537f6c5f /fs/cifs
parente68a932b0b8e38eaa2111fc3aab31ff66988f1c4 (diff)
downloadlinux-bf1fdeb7899a86adfbe0b521bee5cf78bb870a14.tar.xz
smb3: add reconnect tracepoints
Add tracepoints for reconnecting an smb3 session Example output (from trace-cmd) with the patch (showing the session marked for reconnect, the stat failing, and then the subsequent SMB3 commands after the server comes back up). The "smb3_reconnect" event is the new one. cifsd-25993 [000] .... 29635.368265: smb3_reconnect: server=localhost current_mid=0x1e stat-26200 [001] .... 29638.516403: smb3_enter: cifs_revalidate_dentry_attr: xid=22 stat-26200 [001] .... 29648.723296: smb3_exit_err: cifs_revalidate_dentry_attr: xid=22 rc=-112 kworker/0:1-22830 [000] .... 29653.850947: smb3_cmd_done: sid=0x0 tid=0x0 cmd=0 mid=0 kworker/0:1-22830 [000] .... 29653.851191: smb3_cmd_err: sid=0x8ae4683c tid=0x0 cmd=1 mid=1 status=0xc0000016 rc=-5 kworker/0:1-22830 [000] .... 29653.855254: smb3_cmd_done: sid=0x8ae4683c tid=0x0 cmd=1 mid=2 kworker/0:1-22830 [000] .... 29653.855482: smb3_cmd_done: sid=0x8ae4683c tid=0x8084f30d cmd=3 mid=3 Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/connect.c1
-rw-r--r--fs/cifs/trace.h26
-rw-r--r--fs/cifs/transport.c2
3 files changed, 29 insertions, 0 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 67f91a6313a0..d9bd10d295a9 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -348,6 +348,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
server->max_read = 0;
cifs_dbg(FYI, "Reconnecting tcp session\n");
+ trace_smb3_reconnect(server->CurrentMid, server->hostname);
/* before reconnecting the tcp session, mark the smb session (uid)
and the tid bad so they are not used until reconnected */
diff --git a/fs/cifs/trace.h b/fs/cifs/trace.h
index 0fdf2f5c07ba..6b50b57e2416 100644
--- a/fs/cifs/trace.h
+++ b/fs/cifs/trace.h
@@ -423,6 +423,32 @@ DEFINE_EVENT(smb3_open_done_class, smb3_##name, \
DEFINE_SMB3_OPEN_DONE_EVENT(open_done);
DEFINE_SMB3_OPEN_DONE_EVENT(posix_mkdir_done);
+DECLARE_EVENT_CLASS(smb3_reconnect_class,
+ TP_PROTO(__u64 currmid,
+ char *hostname),
+ TP_ARGS(currmid, hostname),
+ TP_STRUCT__entry(
+ __field(__u64, currmid)
+ __field(char *, hostname)
+ ),
+ TP_fast_assign(
+ __entry->currmid = currmid;
+ __entry->hostname = hostname;
+ ),
+ TP_printk("server=%s current_mid=0x%llx",
+ __entry->hostname,
+ __entry->currmid)
+)
+
+#define DEFINE_SMB3_RECONNECT_EVENT(name) \
+DEFINE_EVENT(smb3_reconnect_class, smb3_##name, \
+ TP_PROTO(__u64 currmid, \
+ char *hostname), \
+ TP_ARGS(currmid, hostname))
+
+DEFINE_SMB3_RECONNECT_EVENT(reconnect);
+DEFINE_SMB3_RECONNECT_EVENT(partial_send_reconnect);
+
#endif /* _CIFS_TRACE_H */
#undef TRACE_INCLUDE_PATH
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 0f9156af5eb0..357d25351ffa 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -361,6 +361,8 @@ uncork:
* socket so the server throws away the partial SMB
*/
server->tcpStatus = CifsNeedReconnect;
+ trace_smb3_partial_send_reconnect(server->CurrentMid,
+ server->hostname);
}
smbd_done:
if (rc < 0 && rc != -EINTR)