mds: Return EINVAL for parent lookup on root ino

This was the behaviour before 8d6b25a1, and distinguishes
the general failure to find a parent (ESTALE) from the specific
case of a node being present but being the base (EINVAL)

Signed-off-by: John Spray <john.spray@inktank.com>
client: Add lookup_parent & lookup_name

Exposing the CEPH_MDS_OP_LOOKUPPARENT and
recently added CEPH_MDS_OP_LOOKUPNAME operations.

lookup_ino and lookup_parent optionally take an Inode**
which will be populated with a reference to the
resulting inode.

Fixes: #3863

Signed-off-by: John Spray <john.spray@inktank.com>
libcephfs: add ceph_ll_lookup_inode

This is a wrapper to lookup_ino, lookup_parent
and lookup_name, to provide the
caller with the requested inode and its
dentry.  The result is suitable for traversing
the inode's path.

Fixes: #3863

Signed-off-by: John Spray <john.spray@inktank.com>
tools: Create ceph-client-debug

For exposing test/dev functionality which uses
the cephfs client interface.

Initially just provides lookup-by-ino.

Fixes: #3863

Signed-off-by: John Spray <john.spray@inktank.com>
document adding dev key for custom Apache/FCGI install

following the docs will only get you the release key and the install of custom Apache/FCGI fails w/ key error
mailmap: Warren Usui is with Inktank

Reviewed-by: Warren Usui <warren.usui@inktank.com>
Signed-off-by: Loic Dachary <loic@dachary.org>
mailmap: Allen Samuels affiliation

Signed-off-by: Loic Dachary <loic@dachary.org>
be nitpicky about missing references

Signed-off-by: Alfredo Deza <alfredo@deza.pe>
ensure pybind is in the PYTHONPATH

Signed-off-by: Alfredo Deza <alfredo@deza.pe>
mailmap: Stephan Renatus affiliation

Reviewed-by: Stephan Renatus <s.renatus@x-ion.de>
Signed-off-by: Loic Dachary <loic@dachary.org>
mailmap: Sharif Olorin affiliation

Reviewed-by: Sharif Olorin <sio@tesser.org>
Signed-off-by: Loic Dachary <loic@dachary.org>
mailmap: Mohammad Salehe affiliation

Reviewed-by: Mohammad Salehe <salehe+dev@gmail.com>
Signed-off-by: Loic Dachary <loic@dachary.org>
mailmap: James Ryan Cresawn affiliation

Signed-off-by: Loic Dachary <loic@dachary.org>
mailmap: Guang Yang affiliation

and name normalization

Reviewed-by: Guang Yang <yguang@yahoo-inc.com>
Signed-off-by: Loic Dachary <loic@dachary.org>
mailmap: Tyler Brekke name normalization

Reviewed-by: Tyler Brekke <tyler.brekke@inktank.com>
Signed-off-by: Loic Dachary <loic@dachary.org>
mailmap: Huang Jun name normalization

Signed-off-by: Loic Dachary <loic@dachary.org>
mailmap: Inktank jenkins bot

Signed-off-by: Loic Dachary <loic@dachary.org>
rgw: add data_extra pool to bucket

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
rgw: zone placement info includes extra data pool

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>
rgw: multipart meta object uses extra data pool

Fixes: #7676
We need the extra data pool since EC backends cannot handle the omap
operations that are needed for the multipart meta object.

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>