Taking inspiration from
https://github.com/golang/go/issues/17604#issuecomment-256384471
suggests that taking the address of a stack variable for use in atomics
works (at least, the race detector doesn't complain) but is doing it
wrong.
The only other change is a change in Leader() detecting if HA is enabled
to fast-path out. This value never changes after NewCore, so we don't
need to grab the read lock to check it.
* Fix writing to KVv2 root via `kv put`
The check that adds the API path wasn't taking into account the root,
e.g. if it's mounted at `kv`, `kv` and `kv/` would end up creating an
extra copy of the mount path in front, leading to paths like
`kv/data/kv`.
* Output warnings if they come back and fix a panic in metadata_get
* Also add to metadata put/delete
* Do some best-effort cleanup in file backend
If put results in an encoding error and after the file is closed we
detect it's zero bytes, it could be caused by an out of space error on
the disk since file info is often stored in filesystem metadata with
reserved space. This tries to detect that scenario and perform
best-effort cleanup. We only do this on zero length files to ensure that
if an encode fails to write but the system hasn't already performed
truncation, we leave the existing data alone.
Vault should never write a zero-byte file (as opposed to a zero-byte
value in the encoded JSON) so if this case is hit it's always an error.
* Also run a check on Get
* Add entity information request to system view
* fixing a few comments
* sharing types between plugin and logical
* sharing types between plugin and logical
* fixing output directory for proto
* removing extra replacement
* adding mount type lookup
* empty entities return nil instead of error
* adding some comments
