[PATCH v4 0/6] xenstore: enhance runtime debug capabilities

[Juergen Gross <jgross@suse.com>]

Today xenstored supports logging only via a command line parameter.
This means that logging is either all the time off (default) or on.
To switch logging on the Xen host has to be rebooted as xenstored
isn't restartable.

This patch series changes this by using the XS_DEBUG wire command of
Xenstore to control various debug functions:

- switch logging on/off
- specify logfile to use
- write memory usage to file

This will enable the host administrator to control above functionality
without the need of specifying any additional command line parameters
of xenstored or to restart the host in case of debug information
needed.

Changes in V4:
- Removed patch 1 as already applied
- Patch 3 (was 4): add missing free(), use goto-style error handling,
  xs_debug_command() -> xs_control_command() (all Wei Liu)

Changes in V3:
- Added new patch 1: fix a bug in reopen_log() (Wei Liu)
- Patch 2 (was 1): add xs_control_command() to libxenstore (Wei Liu)
- Split old patch 2 into two patches (Wei Liu)
- Add comment to patch 6 (was 4) (Wei Liu)

Changes in V2:
- added new patch 1 (rename of XS_DEBUG to XS_CONTROL)

Juergen Gross (6):
  xenstore: rename XS_DEBUG wire command
  xenstore: Split out XS_CONTROL action to dedicated source file
  xenstore: enhance control command support
  xenstore: add support for changing log functionality dynamically
  xenstore: make memory report available via XS_CONTROL
  xenstore: remove memory report command line support

 tools/xenstore/Makefile            |   4 +-
 tools/xenstore/include/xenstore.h  |   4 +-
 tools/xenstore/xenstore_control.c  |  70 +++++++++----
 tools/xenstore/xenstored_control.c | 198 +++++++++++++++++++++++++++++++++++++
 tools/xenstore/xenstored_control.h |  19 ++++
 tools/xenstore/xenstored_core.c    |  81 ++++-----------
 tools/xenstore/xenstored_core.h    |   6 +-
 tools/xenstore/xs.c                |  13 ++-
 xen/include/public/io/xs_wire.h    |   3 +-
 9 files changed, 307 insertions(+), 91 deletions(-)
 create mode 100644 tools/xenstore/xenstored_control.c
 create mode 100644 tools/xenstore/xenstored_control.h

-- 
2.10.2


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