[Virtio-fs] [PATCH v3 0/2] Fix xattr operation

[Misono Tomohiro]

This fixes the xattr operation for directory and special files
(which can be tested by xfstests generic/062 with -o xattr option).

The overall logic is switched back to the same as v1 in favor of performance
(i.e. keep original implementation for regular files/directories)
but I add a cleanup patch to improve readability as requested by Vivek.

Known issue is that if xattr enabled, seek sanity tests (generic/285,
436) will fail. However, I understand this is not a very serious bug
like data corruption so leave it for now.

One question; I remove error handling of fchdir() in v3 since
I believe fchdir to proc_self_fd/root.fd cannot fail in the situation
but should I add error handling?

change v2 -> v3:
 - rebased to current dev branch
 - add cleanup path (first one) to simplify main patch (second patch)
 - restore the logic of v1 in favor of performance
   (as a result seek sanity test failure is not fixed by this series) 
 - remove error handling of fchdir
 - drop ACL fix included in v2 for now to focus xattr
 
v2 patch: https://www.redhat.com/archives/virtio-fs/2020-January/msg00131.html

Thanks!

Misono Tomohiro (2):
  virtiofs: passthrough_ll: cleanup getxattr/listxattr
  virtiofs: Fix xattr operations

 tools/virtiofsd/fuse_virtio.c    |  13 +++
 tools/virtiofsd/passthrough_ll.c | 141 +++++++++++++++----------------
 tools/virtiofsd/seccomp.c        |   6 ++
 3 files changed, 87 insertions(+), 73 deletions(-)

-- 
2.21.1