[dpdk-dev] [PATCH v4 00/11] eal: replace calls to rte_panic and refrain from new instances

[Arnon Warshavsky <arnon@qwilt.com>]

The purpose of this patch series is to cleanup the library code
from paths that end up aborting the process,
and move to checking error values, in order to allow the running process
perform an orderly teardown or other mitigation of the event.

This patch modifies the majority of rte_panic calls
under lib and drivers, and replaces them with a log message
and an error return code according to context,
that can be propagated up the call stack.

- Focus was given to the dpdk initialization path
- Some of the panic calls within drivers were left in place where
  the call is from within an interrupt or calls that are
  on the data path,where there is no simple applicative
  route to propagate the error to temination.
  These should be handled by the driver maintainers.
- In order to avoid breaking ABI where panic was called from public
  void functions, a panic state variable was introduced so that
  it can be queried after calling these void functions.
  This tool place for a single function call.
- local void functions with no api were changed to retrun a value
  where needed
- No change took place in example and test files
- No change took place for debug assertions calling panic
- A new function was added to devtools/checkpatches.sh
  in order to prevent new additions of calls to rte_panic
  under lib and drivers.

Keep calm and don't panic

---

v2:
- reformat error messages so that literal string are in the same line
- fix typo in commit message
- add new return code to doxigen of rte_memzone_free()

v3:
- submit  all 13 patches changed and unchanged in the same patchset

v4:
- remove 2 patches that are no more relevant
- fix split literal string in error message
- change return value -1 to enum
- split value and success code in a static function

Arnon Warshavsky (11):
  crypto: replace rte_panic instances in crypto driver
  bond: replace rte_panic instances in bonding driver
  e1000: replace rte_panic instances in e1000 driver
  ixgbe: replace rte_panic instances in ixgbe driver
  eal: replace rte_panic instances in eventdev
  kni: replace rte_panic instances in kni
  eal: replace rte_panic instances in hugepage_info
  eal: replace rte_panic instances in interrupts thread
  eal: replace rte_panic instances in ethdev
  eal: replace rte_panic instances in init sequence
  devtools: prevent new instances of rte_panic and rte_exit

 devtools/checkpatches.sh                          |  94 ++++++++++++++++-
 drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c       |   8 +-
 drivers/crypto/dpaa_sec/dpaa_sec.c                |   8 +-
 drivers/net/bonding/rte_eth_bond_8023ad.c         |  28 +++--
 drivers/net/bonding/rte_eth_bond_8023ad_private.h |   2 +-
 drivers/net/bonding/rte_eth_bond_api.c            |  20 ++--
 drivers/net/bonding/rte_eth_bond_pmd.c            |   9 +-
 drivers/net/bonding/rte_eth_bond_private.h        |   2 +-
 drivers/net/e1000/e1000_ethdev.h                  |   2 +-
 drivers/net/e1000/igb_ethdev.c                    |   3 +-
 drivers/net/e1000/igb_pf.c                        |  15 +--
 drivers/net/ixgbe/ixgbe_ethdev.c                  |   3 +-
 drivers/net/ixgbe/ixgbe_ethdev.h                  |   2 +-
 drivers/net/ixgbe/ixgbe_pf.c                      |  13 ++-
 lib/librte_eal/bsdapp/eal/eal.c                   |  86 +++++++++++-----
 lib/librte_eal/bsdapp/eal/eal_thread.c            |  65 +++++++++---
 lib/librte_eal/common/eal_common_launch.c         |  21 ++++
 lib/librte_eal/common/include/rte_debug.h         |  12 +++
 lib/librte_eal/linuxapp/eal/eal.c                 | 120 +++++++++++++++-------
 lib/librte_eal/linuxapp/eal/eal_hugepage_info.c   |  32 ++++--
 lib/librte_eal/linuxapp/eal/eal_interrupts.c      |  27 +++--
 lib/librte_eal/linuxapp/eal/eal_thread.c          |  65 +++++++++---
 lib/librte_ether/rte_ethdev.c                     |  36 +++++--
 lib/librte_eventdev/rte_eventdev_pmd_pci.h        |   8 +-
 lib/librte_eventdev/rte_eventdev_pmd_vdev.h       |   8 +-
 lib/librte_kni/rte_kni.c                          |  18 ++--
 lib/librte_kni/rte_kni_fifo.h                     |  11 +-
 27 files changed, 533 insertions(+), 185 deletions(-)

-- 
1.8.3.1