[xfsprogs PATCH v4 0/2] Add necessary items for MAP_SYNC testing

Ross Zwisler
2017-12-21T22:03:20Z

This is the fourth revision of my MAP_SYNC + dm-log-writes support for
xfsprogs. The previous revision can be found here:

https://lists.01.org/pipermail/linux-nvdimm/2017-December/013473.html

Changes since v3:

- Fixed indentation of variable declarations (Darrick).

- Added a comment for the case where MAP_SYNC and MAP_SHARED_VALIDATE
aren't defined in system headers and we fail an msync command
(Darrick).

- Dropped patch 1 of the previous series which fixed compiler warnings.
A fix for this issue was already submitted by Dave.

---

As suggested by Dave Chinner:

As I say to all these sorts of one-off test prgrams: please add the
new MAP_SYNC flag to xfs_io rather than writing a one-off
test program to set it and write some data.

And if we're going to be adding special custom tests just because
we need to insert dm-log marks, add that functionality to xfs_io,
too.

That way we can create complex custom dm logwrite tests without
needing one-off test programs for them all...

This series enhances xfs_io by adding support for the MAP_SYNC mmap() flag
and for dm-log-writes marks. This allows the resulting xfstest for
MAP_SYNC to be much simpler and have no custom C programs.

Ross Zwisler (2):
xfs_io: add MAP_SYNC support to mmap()
xfs_io: add a new 'log_writes' command

configure.ac | 2 +
debian/control | 2 +-
include/builddefs.in | 3 ++
include/linux.h | 8 ++++
io/Makefile | 10 +++++
io/init.c | 1 +
io/io.h | 7 ++++
io/log_writes.c | 106 ++++++++++++++++++++++++++++++++++++++++++++++++
io/mmap.c | 29 ++++++++++---
m4/Makefile | 1 +
m4/package_devmapper.m4 | 11 +++++
m4/package_libcdev.m4 | 16 ++++++++
man/man8/xfs_io.8 | 29 ++++++++++++-
13 files changed, 217 insertions(+), 8 deletions(-)
create mode 100644 io/log_writes.c
create mode 100644 m4/package_devmapper.m4