E-tag propagation replies on the mtime of the file. Order of events:
1. add file 'foo.txt' with content 'bar'
2. Set mtime to now() - 1
3. Check if etag changed.
Now this goes right often when 1 and 2 happen in the same second.
However imagine
1. add file 'foo.txt' with content 'bar' (at t=0.999)
2. Set mtime to now() - 1 (at t=1.001)
Now the mtime will be set to the same time. Thus not chaning the etag.
Currently the `getPath` methods returned `NULL` in case when a file with the specified ID does not exist. This however mandates that developers are checking for the `NULL` case and if they do not the door for bugs with all kind of impact is widely opened.
This is especially harmful if used in context with Views where the final result is limited based on the result of `getPath`, if `getPath` returns `NULL` PHP type juggles this to an empty string resulting in all possible kind of bugs.
While one could argue that this is a misusage of the API the fact is that it is very often misused and an exception will trigger an immediate stop of execution as well as log this behaviour and show a pretty error page.
I also adjusted some usages where I believe that we need to catch these errors, in most cases this is though simply an error that should hard-fail.
use default config for swift primary storage test config
allow testsuite to complete
fix timeout, script cleanup, enable debug for now
use btrfs loopback device, requires privileged container and absolute path
throw exception when storage has problems
debug by echo ...
sleep more, more debug
Roeland Jago Douma
Thomas Müller
Robin Appelman
Lukas Reschke
Jörn Friedrich Dreyer
Morris Jobke
Vincent Petry