overlay/016 tests two cases of ro/rw fd data inconsistecies -
one using pread and one using mmap read (i.e. mread).
The first case now passes with stacked overlay file operations
patch set merged. The second case will still fail.
By splitting the two test cases we get one regression test for
the common case of ro/rw fd data inconsistecy with pread and
one test to track the remaining non-standard behavior of
overlayfs w.r.t mmap.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
This test requires a fix to xfs_io to support
-C one shot commands and -c "open foo" command.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Introduce a new test to demonstrates a known issue with overlayfs:
- process A opens file F for read
- process B writes new data to file F
- process A reads old data from file F
This issue is about to be fixed with a patch set by Miklos Szeredi.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Amir Goldstein