From: Steve French <stfrench@microsoft.com>
Date: Mon, 25 Feb 2019 13:51:11 -0600
Subject: [PATCH] smb3: add tracepoints for query dir
Git-commit: adb3b4e90e103f8300cf2b7187016dad13e848c6
Patch-mainline: v5.1-rc1
References: bsc#1144333
Adds two tracepoints - one for query_dir done (no err) and one for query_dir_err
Sanple output:
To start the trace in one window:
trace-cmd record -e smb3_query_dir*
Then in another window after doing an
ls /mnt
View the trace output by:
trace-cmd show
Sample output:
TASK-PID CPU# |||| TIMESTAMP FUNCTION
| | | |||| | |
ls-24869 [007] .... 90695.452009: smb3_query_dir_done: xid=7 sid=0x5027d24d tid=0xb95cf25a fid=0xc41a8c3e offset=0x0 len=0x16
ls-24869 [000] .... 90695.452764: smb3_query_dir_done: xid=8 sid=0x5027d24d tid=0xb95cf25a fid=0xc41a8c3e offset=0x0 len=0x0
ls-24874 [003] .... 90701.506342: smb3_query_dir_done: xid=11 sid=0x5027d24d tid=0xb95cf25a fid=0x33ad3601 offset=0x0 len=0x8
ls-24874 [003] .... 90701.506917: smb3_query_dir_done: xid=12 sid=0x5027d24d tid=0xb95cf25a fid=0x33ad3601 offset=0x0 len=0x0
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Aurelien Aptel <aaptel@suse.com>
---
fs/cifs/smb2pdu.c | 14 ++++++++++++--
fs/cifs/trace.h | 2 ++
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 64e172633bc4..965c4c7e87f9 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -3857,18 +3857,26 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
if (rc) {
if (rc == -ENODATA &&
rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
+ trace_smb3_query_dir_done(xid, persistent_fid,
+ tcon->tid, tcon->ses->Suid, index, 0);
srch_inf->endOfSearch = true;
rc = 0;
- } else
+ } else {
+ trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
+ tcon->ses->Suid, index, 0, rc);
cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
+ }
goto qdir_exit;
}
rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
info_buf_size);
- if (rc)
+ if (rc) {
+ trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
+ tcon->ses->Suid, index, 0, rc);
goto qdir_exit;
+ }
srch_inf->unicode = true;
@@ -3896,6 +3904,8 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
else
cifs_dbg(VFS, "illegal search buffer type\n");
+ trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid,
+ tcon->ses->Suid, index, srch_inf->entries_in_buffer);
return rc;
qdir_exit:
diff --git a/fs/cifs/trace.h b/fs/cifs/trace.h
index 59be48206932..bf4f43f6893b 100644
--- a/fs/cifs/trace.h
+++ b/fs/cifs/trace.h
@@ -58,6 +58,7 @@ DEFINE_EVENT(smb3_rw_err_class, smb3_##name, \
DEFINE_SMB3_RW_ERR_EVENT(write_err);
DEFINE_SMB3_RW_ERR_EVENT(read_err);
+DEFINE_SMB3_RW_ERR_EVENT(query_dir_err);
/* For logging successful read or write */
@@ -102,6 +103,7 @@ DEFINE_EVENT(smb3_rw_done_class, smb3_##name, \
DEFINE_SMB3_RW_DONE_EVENT(write_done);
DEFINE_SMB3_RW_DONE_EVENT(read_done);
+DEFINE_SMB3_RW_DONE_EVENT(query_dir_done);
/*
* For handle based calls other than read and write, and get/set info
--
2.16.4