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smb3: add dynamic trace point for ioctls

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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: Steve French <stfrench@microsoft.com>
This commit is contained in:
Steve French 2024-03-06 01:03:59 -06:00
parent f3dc1bdb6b
commit 073dd87c8e
2 changed files with 37 additions and 0 deletions
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5
fs/smb/client/ioctl.c
View File

@ -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)

32
fs/smb/client/trace.h
View File

@ -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,