OpenAFS Master Repository branch, master, updated. BP-openafs-stable-1_8_x-99-gf6af4a1

[Gerrit Code Review]

The following commit has been merged in the master branch:
commit f6af4a155d3636e8f812e40c7169dd8902ae64be
Author: Andrew Deason <adeason@sinenomine.net>
Date:   Mon Apr 30 17:30:56 2018 -0500

    LINUX: Return NULL for afs_linux_raw_open error
    
    Currently, afs_linux_raw_open (and by extension, LINUX's
    implementation of osi_UFSOpen) panic when they are unable to open the
    given cache file. To allow callers to handle the error more
    gracefully, change afs_linux_raw_open and osi_UFSOpen to return NULL
    on error, instead of panic'ing. Expand the language a little on the
    message logged while we're here, since the system might keep running
    after this situation now.
    
    This commit also changes all callers that did not already handle
    afs_linux_raw_open/osi_UFSOpen errors to assert on errors, so we still
    panic for all situations where we encounter an error. More graceful
    behavior will be added in future commits; this commit does not change
    the behavior on its own.
    
    An error on opening cache files can legitimately happen when there is
    corruption in the filesystem backing the disk cache, but possibly the
    easiest way to generate an error is if the filesystem has been
    forcibly mounted readonly (which can happen at runtime due to
    filesystem corruption or various hardware faults). The latter will
    generate -EROFS (-30) errors, but of course other errors are probably
    possible.
    
    Change-Id: I1462ec43c76c0b07e9368b37a9dbaedf6b6f4409
    Reviewed-on: https://gerrit.openafs.org/13045
    Tested-by: BuildBot <buildbot@rampaginggeek.com>
    Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>

 src/afs/LINUX/osi_file.c         |   18 +++++++++++++++---
 src/afs/LINUX/osi_vnodeops.c     |    2 ++
 src/afs/VNOPS/afs_vnop_symlink.c |    1 +
 src/afs/VNOPS/afs_vnop_write.c   |    1 +
 src/afs/afs_buffer.c             |    3 +++
 src/afs/afs_dcache.c             |    6 ++++++
 src/afs/afs_disconnected.c       |    1 +
 src/afs/afs_fetchstore.c         |    1 +
 src/afs/afs_init.c               |    1 +
 src/afs/afs_segments.c           |    2 ++
 10 files changed, 33 insertions(+), 3 deletions(-)

-- 
OpenAFS Master Repository