samba.git/examples, branch talloc-2.1.10

examples: add winbindd.stp and a shell script to generate it

2017-07-19T14:20:56+00:00

Usage:

  Instrument all winbindd processes:
  # stap winbindd.stp

  Instrument a specific winbindd process:
  # stap -x PID winbindd.stp

Example output:

  # stap winbindd.stp
  Collecting data, press ctrl-C to stop... ^C

  Winbind request service time
  ============================
  winbindd_getpwnam_send                   count:    99, sum:   6229 ms (min:   2669 us, avg:  62921 us, max: 157907 us)

  Winbind request runtime
  =======================
  winbindd_getpwnam_send                   count:    99, sum:      3 ms (min:     21 us, avg:     36 us, max:     77 us)

  Winbind domain-child request service time
  =========================================
  _wbint_LookupName                        count:    99, sum:   1403 ms (min:    619 us, avg:  14181 us, max: 136613 us)
  _wbint_GetNssInfo                        count:    99, sum:      0 ms (min:      2 us, avg:      3 us, max:      6 us)
  _wbint_LookupSid                         count:   102, sum:     49 ms (min:     13 us, avg:    481 us, max:   6315 us)
  _wbint_Sids2UnixIDs                      count:   101, sum:      2 ms (min:     18 us, avg:     29 us, max:     49 us)
  _wbint_LookupSids                        count:   101, sum:     84 ms (min:    411 us, avg:    838 us, max:   3524 us)

  Winbind domain-child AD-backend service time
  ============================================
  sid_to_name                              count:    56, sum:     45 ms (min:    431 us, avg:    816 us, max:   6275 us)
  sequence_number                          count:    12, sum:   1209 ms (min:  46618 us, avg: 100803 us, max: 131439 us)
  name_to_sid                              count:    99, sum:    176 ms (min:    547 us, avg:   1781 us, max:   9866 us)

  ...

Regenerate winbindd.stp:

  $ examples/systemtap/generate-winbindd.stp.sh

Signed-off-by: Ralph Boehme 
Reviewed-by: Ralph Boehme 

Autobuild-User(master): Ralph Böhme 
Autobuild-Date(master): Wed Jul 19 16:20:56 CEST 2017 on sn-devel-144

examples: add gencache.stp

2017-07-19T10:00:15+00:00

Add a Systemtap script to profile gencache.

Usage:

- profile a single smbd process:
  # stap -x 22225 gencache.stp smbd

- profile all winbindd proceses:
  # stap gencache.stp winbindd

Signed-off-by: Ralph Boehme 
Reviewed-by: Ralph Boehme

s3/vfs: rename SMB_VFS_STRICT_LOCK to SMB_VFS_STRICT_LOCK_CHECK

2017-07-11T01:37:44+00:00

As per MS-SMB2 and MS-FSA and our SMB_VFS_STRICT_LOCK implementation,
we're merely testing for locks, not setting any.

Bug: https://bugzilla.samba.org/show_bug.cgi?id=12887

Signed-off-by: Ralph Boehme 
Reviewed-by: Jeremy Allison 

Autobuild-User(master): Jeremy Allison 
Autobuild-Date(master): Tue Jul 11 03:37:44 CEST 2017 on sn-devel-144

s3/vfs: remove SMB_VFS_STRICT_UNLOCK

2017-07-10T21:22:10+00:00

It's just a noop, so let's remove it. SMB_VFS_STRICT_LOCK doesn't set
logs, it just checks for the presence of incompatible locks.

Bug: https://bugzilla.samba.org/show_bug.cgi?id=12887

Signed-off-by: Ralph Boehme 
Reviewed-by: Jeremy Allison

s3/smbd: remove unneeded flags argument from SMB_VFS_OFFLOAD_WRITE_SEND

2017-07-03T17:59:08+00:00

...and instead use the fsctl to infer required behaviour in the VFS
backends.

Note that this removes the check from vfs_default because there we only
handle FSCTL_SRV_COPYCHUNK(_WRITE) and must always perform the lock
checks.

Signed-off-by: Ralph Boehme 
Reviewed-by: Stefan Metzmacher

s3/vfs: make SMB_VFS_OFFLOAD_WRITE_SEND offload token based

2017-07-03T17:59:08+00:00

Remove the source fsp argument and instead pass the offload token
generated with SMB_VFS_OFFLOAD_READ_SEND/RECV.

An actual offload fsctl is not implemented yet, neither in the VFS nor
at the SMB ioctl layer, and returns NT_STATUS_NOT_IMPLEMENTED

With these changes we now pass the copy-chunk-across-shares test.

Signed-off-by: Ralph Boehme 
Reviewed-by: Stefan Metzmacher

s3/vfs: rename SMB_VFS_COPY_CHUNK_SEND/RECV to SMB_VFS_OFFLOAD_WRITE_SEND/RECV

2017-07-03T17:59:08+00:00

No change in behaviour, just a rename in preperation of more changes to
SMB_VFS_OFFLOAD_WRITE_SEND. It helps keeping the diff of the actual
changes smaller.

Signed-off-by: Ralph Boehme 
Reviewed-by: Stefan Metzmacher

s3/vfs: add SMB_VFS_OFFLOAD_READ_SEND/RECV

2017-07-03T17:59:07+00:00

Add SMB_VFS_OFFLOAD_READ_SEND an SMB_VFS_OFFLOAD_READ_RECV.

This paves the way for supporting server-side copy-chunk with source and
destination file-handles on different shares. It can be used to
implement copy offload fsctl in the future, but for now this will be
used as a mere copy-chunk replacement.

SMB_VFS_OFFLOAD_READ generates a token that associates an fsp with the
token and stores the fsp in a in-memory db.

Initially only a copy-chunk resume key fsctl is supported. In the future
this can be enhanced to support real offload fsctl.

Signed-off-by: Ralph Boehme 
Reviewed-by: Stefan Metzmacher

s3: VFS: Change SMB_VFS_CONNECTPATH to take const struct smb_filename * instead of const char *.

2017-07-01T05:20:28+00:00

We need to migrate all pathname based VFS calls to use a struct
to finish modernising the VFS with extra timestamp and flags parameters.

Signed-off-by: Jeremy Allison 
Reviewed-by: Richard Sharpe 

Autobuild-User(master): Jeremy Allison 
Autobuild-Date(master): Sat Jul  1 07:20:28 CEST 2017 on sn-devel-144

s3: VFS: Change SMB_VFS_REALPATH to take and return struct smb_filename * instead of char *.

2017-07-01T01:07:11+00:00

We need to migrate all pathname based VFS calls to use a struct
to finish modernising the VFS with extra timestamp and flags parameters.

Signed-off-by: Jeremy Allison 
Reviewed-by: Richard Sharpe