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smb3: add dynamic trace point for smb3_cmd_enter 

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>
This commit is contained in:
Steve French 2019-02-26 21:26:20 -06:00
parent efe2e9f369
commit 53a3e0d96c
2 changed files with 4 additions and 0 deletions
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3
fs/cifs/smb2transport.c
View File

@ -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;
}

1
fs/cifs/trace.h
View File

@ -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);