From: Steve French <stfrench@microsoft.com>
Date: Tue, 26 Feb 2019 21:26:20 -0600
Subject: [PATCH] smb3: add dynamic trace point for smb3_cmd_enter
Git-commit: 53a3e0d96c708bca1607507ab2470a3c911c8c81
Patch-mainline: v5.1-rc1
References: bsc#1144333
Add tracepoint before sending an SMB3 command on the wire (ie add
an smb3_cmd_enter tracepoint). This allows us to look in much
more detail at response times (between request and response).
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Acked-by: Aurelien Aptel <aaptel@suse.com>
---
fs/cifs/smb2transport.c | 3 +++
fs/cifs/trace.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index 63264db78b89..fa1fec2e3c8d 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -602,6 +602,8 @@ smb2_mid_entry_alloc(const struct smb2_sync_hdr *shdr,
atomic_inc(&midCount);
temp->mid_state = MID_REQUEST_ALLOCATED;
+ trace_smb3_cmd_enter(shdr->TreeId, shdr->SessionId,
+ le16_to_cpu(shdr->Command), temp->mid);
return temp;
}
@@ -636,6 +638,7 @@ smb2_get_mid_entry(struct cifs_ses *ses, struct smb2_sync_hdr *shdr,
spin_lock(&GlobalMid_Lock);
list_add_tail(&(*mid)->qhead, &ses->server->pending_mid_q);
spin_unlock(&GlobalMid_Lock);
+
return 0;
}
diff --git a/fs/cifs/trace.h b/fs/cifs/trace.h
index b6352b68f18b..2a0be3e1927f 100644
--- a/fs/cifs/trace.h
+++ b/fs/cifs/trace.h
@@ -275,6 +275,7 @@ DEFINE_EVENT(smb3_cmd_done_class, smb3_##name, \
__u64 mid), \
TP_ARGS(tid, sesid, cmd, mid))
+DEFINE_SMB3_CMD_DONE_EVENT(cmd_enter);
DEFINE_SMB3_CMD_DONE_EVENT(cmd_done);
DEFINE_SMB3_CMD_DONE_EVENT(ses_expired);
--
2.16.4