Commit 073dd87c authored by Steve French's avatar Steve French
Browse files

smb3: add dynamic trace point for ioctls 



It can be helpful in debugging to know which ioctls are called to better
correlate them with smb3 fsctls (and opens).  Add a dynamic trace point
to trace ioctls into cifs.ko

Here is sample output:

            TASK-PID     CPU#  |||||  TIMESTAMP  FUNCTION
               | |         |   |||||     |         |
 new-inotify-ioc-90418   [001] ..... 142157.397024: smb3_ioctl: xid=18 fid=0x0 ioctl cmd=0xc009cf0b
 new-inotify-ioc-90457   [007] ..... 142217.943569: smb3_ioctl: xid=22 fid=0x389bf5b6 ioctl cmd=0xc009cf0b

Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
parent f3dc1bdb

fs/smb/client/ioctl.c

+5 −0
Original line number Diff line number Diff line
@@ -345,6 +345,11 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) 
	xid = get_xid();



	cifs_dbg(FYI, "cifs ioctl 0x%x\n", command);

	if (pSMBFile == NULL)

		trace_smb3_ioctl(xid, 0, command);

	else

		trace_smb3_ioctl(xid, pSMBFile->fid.persistent_fid, command);



	switch (command) {

		case FS_IOC_GETFLAGS:

			if (pSMBFile == NULL)

fs/smb/client/trace.h

+32 −0
Original line number Diff line number Diff line
@@ -1032,6 +1032,38 @@ DEFINE_EVENT(smb3_ses_class, smb3_##name, \ 


DEFINE_SMB3_SES_EVENT(ses_not_found);



DECLARE_EVENT_CLASS(smb3_ioctl_class,

	TP_PROTO(unsigned int xid,

		__u64	fid,

		unsigned int command),

	TP_ARGS(xid, fid, command),

	TP_STRUCT__entry(

		__field(unsigned int, xid)

		__field(__u64, fid)

		__field(unsigned int, command)

	),

	TP_fast_assign(

		__entry->xid = xid;

		__entry->fid = fid;

		__entry->command = command;

	),

	TP_printk("xid=%u fid=0x%llx ioctl cmd=0x%x",

		__entry->xid, __entry->fid, __entry->command)

)



#define DEFINE_SMB3_IOCTL_EVENT(name)        \

DEFINE_EVENT(smb3_ioctl_class, smb3_##name,  \

	TP_PROTO(unsigned int xid,	     \

		__u64 fid,		     \

		unsigned int command),	     \

	TP_ARGS(xid, fid, command))



DEFINE_SMB3_IOCTL_EVENT(ioctl);











DECLARE_EVENT_CLASS(smb3_credit_class,

	TP_PROTO(__u64	currmid,

		__u64 conn_id,