[PATCH v2 00/17] netlink fixes and cleanups

[David Gibson <david@gibson.dropbear.id.au>]

We've had several bugs in the past that were quite tricky to debug,
but would have been much easier if we'd known that a netlink operation
had failed.  So, it would be desirable to actually detect and report
failures of netlink operations.  While working on that, I discovered
that there are a number of other issues ranging from very small to
medium sized with the way we use netlink.  This series addresses many
of them.

Link: https://bugs.passt.top/show_bug.cgi?id=60
Link: https://bugs.passt.top/show_bug.cgi?id=67

This series was tested as based on the pending patches adding C11
support, though I believe it trivially rebases onto current main.

Changes since v1:
 * Assorted minor fixes based on Stefano's review
 * Rebased on C11 branch

David Gibson (17):
  netlink: Split up functionality of nl_link()
  netlink: Split nl_addr() into separate operation functions
  netlink: Split nl_route() into separate operation functions
  netlink: Use struct in_addr for IPv4 addresses, not bare uint32_t
  netlink: Explicitly pass netlink sockets to operations
  netlink: Make nl_*_dup() use a separate datagram for each request
  netlink: Start sequence number from 1 instead of 0
  netlink: Treat send() or recv() errors as fatal
  netlink: Fill in netlink header fields from nl_req()
  netlink: Add nl_do() helper for simple operations with error checking
  netlink: Clearer reasoning about the netlink response buffer size
  netlink: Split nl_req() to allow processing multiple response
    datagrams
  netlink: Add nl_foreach_oftype to filter response message types
  netlink: Propagate errors for "set" operations
  netlink: Always process all responses to a netlink request
  netlink: Propagate errors for "dump" operations
  netlink: Propagate errors for "dup" operations

 conf.c    |  66 ++++-
 netlink.c | 843 ++++++++++++++++++++++++++++++++++--------------------
 netlink.h |  27 +-
 pasta.c   |  75 +++--
 4 files changed, 658 insertions(+), 353 deletions(-)

-- 
2.41.0