From: Elena Reshetova <elena.reshetova@intel.com>
To: axboe@kernel.dk
Cc: james.bottomley@hansenpartnership.com,
linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
linux-scsi@vger.kernel.org, linux-btrfs@vger.kernel.org,
peterz@infradead.org, gregkh@linuxfoundation.org,
fujita.tomonori@lab.ntt.co.jp, mingo@redhat.com, clm@fb.com,
jbacik@fb.com, dsterba@suse.com, keescook@chromium.org,
Elena Reshetova <elena.reshetova@intel.com>
Subject: [PATCH 0/6] v4 block refcount conversion patches
Date: Fri, 20 Oct 2017 11:15:56 +0300 [thread overview]
Message-ID: <1508487362-26663-1-git-send-email-elena.reshetova@intel.com> (raw)
Changes in v4:
- Improved commit messages and signoff info.
- Rebase on top of linux-next as of yesterday.
- WARN_ONs are restored since x86 refcount_t does not WARN on zero
Changes in v3:
No changes in patches apart from trivial rebases, but now by
default refcount_t = atomic_t and uses all atomic standard operations
unless CONFIG_REFCOUNT_FULL is enabled. This is a compromize for the
systems that are critical on performance and cannot accept even
slight delay on the refcounter operations.
Changes in v2:
Not needed WARNs are removed since refcount_t warns by itself.
BUG_ONs are left as it is, since refcount_t doesn't bug by default.
This series, for block subsystem, replaces atomic_t reference
counters with the new refcount_t type and API (see include/linux/refcount.h).
By doing this we prevent intentional or accidental
underflows or overflows that can lead to use-after-free vulnerabilities.
The patches are fully independent and can be cherry-picked separately.
If there are no objections to the patches, please merge them via respective trees.
Elena Reshetova (6):
block: convert bio.__bi_cnt from atomic_t to refcount_t
block: convert blk_queue_tag.refcnt from atomic_t to refcount_t
block: convert blkcg_gq.refcnt from atomic_t to refcount_t
block: convert io_context.active_ref from atomic_t to refcount_t
block: convert bsg_device.ref_count from atomic_t to refcount_t
drivers, block: convert xen_blkif.refcnt from atomic_t to refcount_t
block/bfq-iosched.c | 2 +-
block/bio.c | 6 +++---
block/blk-cgroup.c | 2 +-
block/blk-ioc.c | 4 ++--
block/blk-tag.c | 8 ++++----
block/bsg.c | 9 +++++----
block/cfq-iosched.c | 4 ++--
drivers/block/xen-blkback/common.h | 7 ++++---
drivers/block/xen-blkback/xenbus.c | 2 +-
fs/btrfs/volumes.c | 2 +-
include/linux/bio.h | 4 ++--
include/linux/blk-cgroup.h | 11 ++++++-----
include/linux/blk_types.h | 3 ++-
include/linux/blkdev.h | 3 ++-
include/linux/iocontext.h | 7 ++++---
15 files changed, 40 insertions(+), 34 deletions(-)
--
2.7.4
next reply other threads:[~2017-10-20 8:16 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-20 8:15 Elena Reshetova [this message]
2017-10-20 8:15 ` [PATCH 1/6] block: convert bio.__bi_cnt from atomic_t to refcount_t Elena Reshetova
2017-10-20 8:15 ` [PATCH 2/6] block: convert blk_queue_tag.refcnt " Elena Reshetova
2017-10-20 8:15 ` [PATCH 3/6] block: convert blkcg_gq.refcnt " Elena Reshetova
2017-10-20 8:16 ` [PATCH 4/6] block: convert io_context.active_ref " Elena Reshetova
2017-10-20 8:16 ` [PATCH 5/6] block: convert bsg_device.ref_count " Elena Reshetova
2017-10-20 8:16 ` [PATCH 6/6] drivers, block: convert xen_blkif.refcnt " Elena Reshetova
2017-10-20 8:43 ` [PATCH 0/6] v4 block refcount conversion patches Johannes Thumshirn
2017-10-20 10:25 ` Reshetova, Elena
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