Sometimes docker-master CI fails on rhel4+selinux configuration,
like this:
--- FAIL: TestMount (0.12s)
--- FAIL: TestMount/none-remount,size=128k (0.01s)
mounter_linux_test.go:209: unexpected mount option "seclabel" expected "rw,size=128k"
--- FAIL: TestMount/none-remount,ro,size=128k (0.01s)
mounter_linux_test.go:209: unexpected mount option "seclabel" expected "ro,size=128k"
Earlier, commit 8bebd42df2 (PR #34965) fixed this failure,
but not entirely (i.e. the test is now flaky). It looks like
either selinux detection code is not always working (it won't
work in d-in-d), or the kernel might or might not add 'seclabel'
option).
As the subject of this test case is definitely not selinux,
it can just ignore the option added by it.
While at it, fix error messages:
- add missing commas;
- fix a typo;
- allow for clear distinction between mount
and vfs (per-superblock) options.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Functions `GetMounts()` and `parseMountTable()` return all the entries
as read and parsed from /proc/self/mountinfo. In many cases the caller
is only interested only one or a few entries, not all of them.
One good example is `Mounted()` function, which looks for a specific
entry only. Another example is `RecursiveUnmount()` which is only
interested in mount under a specific path.
This commit adds `filter` argument to `GetMounts()` to implement
two things:
1. filter out entries a caller is not interested in
2. stop processing if a caller is found what it wanted
`nil` can be passed to get a backward-compatible behavior, i.e. return
all the entries.
A few filters are implemented:
- `PrefixFilter`: filters out all entries not under `prefix`
- `SingleEntryFilter`: looks for a specific entry
Finally, `Mounted()` is modified to use `SingleEntryFilter()`, and
`RecursiveUnmount()` is using `PrefixFilter()`.
Unit tests are added to check filters are working.
[v2: ditch NoFilter, use nil]
[v3: ditch GetMountsFiltered()]
[v4: add unit test for filters]
[v5: switch to gotestyourself]
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
This makes `go test .` to pass if run as non-root user, skipping
those tests that require superuser privileges (for `mount`).
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
The case where we are trying to do a remount with changed filesystem specific options was missing,
we need to call `mount` as well here to change those options.
See #33844 for where we need this, as we change `tmpfs` options.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
Propagation type changes must be done as a separate call, in the
same way as read only bind mounts.
To fix this:
1. Ensure propagation type change flags aren't included in other calls.
2. Apply propagation type change in a separate call.
Also:
* Make it clear which parameters are ignored by passing them as empty.
* Add tests to ensure Mount options are applied correctly.
Fixes#30415
Signed-off-by: Steven Hartland <steven.hartland@multiplay.co.uk>
Kir Kolyshkin