[dm-devel] [PATCH 0/3] multipath: fixes for SAS expanders and root FS access

[mwilck at suse.com]

From: Martin Wilck <mwilck at suse.com>

Hi Christophe, hi Ben,

here are 3 patches I'd like to get reviewed before we create a pull
request. The first two are related to complex SAS setups, the second
one is to avoid accessing the root file system in a possible dangerous
situation.

Wrt 2/3: while testing it, I discovered that "I_T_nexus_loss_timeout"
is a read-only sysfs attribute, therefore this code does nothing.
I considered removing it altogether, observing that the attribute has
been read-only as long as it existed (v2.6.17, 2006). I'd like some
feedback beforehand, though, perhaps some distros use patched kernels
that make this attribute r/w?

Regards
Martin

Martin Wilck (3):
  libmultipath: use 3rd digit as transport_id for expanders
  libmultipath: sysfs_set_nexus_loss_tmo(): support SAS expanders
  multipathd: add code to initalize unwinder

 libmultipath/discovery.c   | 35 ++++++++++++++++++++++++++++-------
 multipathd/Makefile        |  2 +-
 multipathd/init_unwinder.c | 34 ++++++++++++++++++++++++++++++++++
 multipathd/init_unwinder.h | 21 +++++++++++++++++++++
 multipathd/main.c          |  2 ++
 5 files changed, 86 insertions(+), 8 deletions(-)
 create mode 100644 multipathd/init_unwinder.c
 create mode 100644 multipathd/init_unwinder.h

-- 
2.29.2