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smb3: add tracepoints for query dir 

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>
This commit is contained in:
Steve French 2019-02-25 13:51:11 -06:00
parent 0d481325a9
commit adb3b4e90e
2 changed files with 14 additions and 2 deletions
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14
fs/cifs/smb2pdu.c
View File

@ -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:

2
fs/cifs/trace.h
View File

@ -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