linux-stable.git/tools/hv, branch linux-5.6.y

Tools: hv: Reopen the devices if read() or write() returns errors

2020-01-27T03:10:10+00:00

The state machine in the hv_utils driver can run out of order in some
corner cases, e.g. if the kvp daemon doesn't call write() fast enough
due to some reason, kvp_timeout_func() can run first and move the state
to HVUTIL_READY; next, when kvp_on_msg() is called it returns -EINVAL
since kvp_transaction.state is smaller than HVUTIL_USERSPACE_REQ; later,
the daemon's write() gets an error -EINVAL, and the daemon will exit().

We can reproduce the issue by sending a SIGSTOP signal to the daemon, wait
for 1 minute, and send a SIGCONT signal to the daemon: the daemon will
exit() quickly.

We can fix the issue by forcing a reset of the device (which means the
daemon can close() and open() the device again) and doing extra necessary
clean-up.

Signed-off-by: Dexuan Cui 
Reviewed-by: Michael Kelley 
Signed-off-by: Sasha Levin

tools: hv: add vmbus testing tool

2019-11-22T01:10:44+00:00

This is a userspace tool to drive the testing. Currently it supports
introducing user specified delay in the host to guest communication
path on a per-channel basis.

Signed-off-by: Branden Bonaby 
Reviewed-by: Michael Kelley 
Signed-off-by: Sasha Levin

Merge tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

2019-09-24T19:36:31+00:00

Pull Hyper-V updates from Sasha Levin:

 - first round of vmbus hibernation support (Dexuan Cui)

 - remove dependencies on PAGE_SIZE (Maya Nakamura)

 - move the hyper-v tools/ code into the tools build system (Andy
   Shevchenko)

 - hyper-v balloon cleanups (Dexuan Cui)

* tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  Drivers: hv: vmbus: Resume after fixing up old primary channels
  Drivers: hv: vmbus: Suspend after cleaning up hv_sock and sub channels
  Drivers: hv: vmbus: Clean up hv_sock channels by force upon suspend
  Drivers: hv: vmbus: Suspend/resume the vmbus itself for hibernation
  Drivers: hv: vmbus: Ignore the offers when resuming from hibernation
  Drivers: hv: vmbus: Implement suspend/resume for VSC drivers for hibernation
  Drivers: hv: vmbus: Add a helper function is_sub_channel()
  Drivers: hv: vmbus: Suspend/resume the synic for hibernation
  Drivers: hv: vmbus: Break out synic enable and disable operations
  HID: hv: Remove dependencies on PAGE_SIZE for ring buffer
  Tools: hv: move to tools buildsystem
  hv_balloon: Reorganize the probe function
  hv_balloon: Use a static page for the balloon_up send buffer

Tools: hv: move to tools buildsystem

2019-08-20T15:31:45+00:00

There is a nice buildsystem dedicated for userspace tools in Linux kernel tree.
Switch Hyper-V daemons to be built by it.

Cc: Vitaly Kuznetsov 
Signed-off-by: Andy Shevchenko 
Tested-by: Vitaly Kuznetsov 
Signed-off-by: Sasha Levin

Tools: hv: kvp: eliminate 'may be used uninitialized' warning

2019-08-20T15:29:53+00:00

When building hv_kvp_daemon GCC-8.3 complains:

hv_kvp_daemon.c: In function ‘kvp_get_ip_info.constprop’:
hv_kvp_daemon.c:812:30: warning: ‘ip_buffer’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  struct hv_kvp_ipaddr_value *ip_buffer;

this seems to be a false positive: we only use ip_buffer when
op == KVP_OP_GET_IP_INFO and it is only unset when op == KVP_OP_ENUMERATE.

Silence the warning by initializing ip_buffer to NULL.

Signed-off-by: Vitaly Kuznetsov 
Signed-off-by: Sasha Levin

tools: hv: fix typos in toolchain

2019-08-17T19:29:28+00:00

Fix typos in the HyperV toolchain.

Signed-off-by: Adrian Vladu 

Cc: "K. Y. Srinivasan" 
Cc: Haiyang Zhang 
Cc: Stephen Hemminger 
Cc: Sasha Levin 
Cc: Alessandro Pilotti 
Signed-off-by: Sasha Levin

tools: hv: fix KVP and VSS daemons exit code

2019-08-17T19:29:23+00:00

HyperV KVP and VSS daemons should exit with 0 when the '--help'
or '-h' flags are used.

Signed-off-by: Adrian Vladu 

Cc: "K. Y. Srinivasan" 
Cc: Haiyang Zhang 
Cc: Stephen Hemminger 
Cc: Sasha Levin 
Cc: Alessandro Pilotti 
Signed-off-by: Sasha Levin

tools: hv: fixed Python pep8/flake8 warnings for lsvmbus

2019-08-17T19:29:18+00:00

Fixed pep8/flake8 python style code for lsvmbus tool.

The TAB indentation was on purpose ignored (pep8 rule W191) to make
sure the code is complying with the Linux code guideline.
The following command doe not show any warnings now:
pep8 --ignore=W191 lsvmbus
flake8 --ignore=W191 lsvmbus

Signed-off-by: Adrian Vladu 

Cc: "K. Y. Srinivasan" 
Cc: Haiyang Zhang 
Cc: Stephen Hemminger 
Cc: Sasha Levin 
Cc: Dexuan Cui 
Cc: Alessandro Pilotti 
Signed-off-by: Sasha Levin

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 280

2019-06-05T15:36:36+00:00

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation this program is
  distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose good title or non infringement see
  the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 9 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Alexios Zavras 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141900.459653302@linutronix.de
Signed-off-by: Greg Kroah-Hartman

Tools: hv: kvp: Fix a warning of buffer overflow with gcc 8.0.1

2018-11-11T20:58:27+00:00

The patch fixes:

hv_kvp_daemon.c: In function 'kvp_set_ip_info':
hv_kvp_daemon.c:1305:2: note: 'snprintf' output between 41 and 4136 bytes
into a destination of size 4096

The "(unsigned int)str_len" is to avoid:

hv_kvp_daemon.c:1309:30: warning: comparison of integer expressions of
different signedness: 'int' and 'long unsigned int' [-Wsign-compare]

Signed-off-by: Dexuan Cui 
Cc: K. Y. Srinivasan 
Cc: Haiyang Zhang 
Cc: Stephen Hemminger 
Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Greg Kroah-Hartman