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* Linux 4.6-rc1v4.6-rc1Linus Torvalds2016-03-261-2/+2
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* Merge branch 'for-linus' of ↵Linus Torvalds2016-03-2622-519/+811
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull Ceph updates from Sage Weil: "There is quite a bit here, including some overdue refactoring and cleanup on the mon_client and osd_client code from Ilya, scattered writeback support for CephFS and a pile of bug fixes from Zheng, and a few random cleanups and fixes from others" [ I already decided not to pull this because of it having been rebased recently, but ended up changing my mind after all. Next time I'll really hold people to it. Oh well. - Linus ] * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (34 commits) libceph: use KMEM_CACHE macro ceph: use kmem_cache_zalloc rbd: use KMEM_CACHE macro ceph: use lookup request to revalidate dentry ceph: kill ceph_get_dentry_parent_inode() ceph: fix security xattr deadlock ceph: don't request vxattrs from MDS ceph: fix mounting same fs multiple times ceph: remove unnecessary NULL check ceph: avoid updating directory inode's i_size accidentally ceph: fix race during filling readdir cache libceph: use sizeof_footer() more ceph: kill ceph_empty_snapc ceph: fix a wrong comparison ceph: replace CURRENT_TIME by current_fs_time() ceph: scattered page writeback libceph: add helper that duplicates last extent operation libceph: enable large, variable-sized OSD requests libceph: osdc->req_mempool should be backed by a slab pool libceph: make r_request msg_size calculation clearer ...
| * libceph: use KMEM_CACHE macroGeliang Tang2016-03-251-8/+2
| | | | | | | | | | | | | | Use KMEM_CACHE() instead of kmem_cache_create() to simplify the code. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * ceph: use kmem_cache_zallocGeliang Tang2016-03-252-2/+2
| | | | | | | | | | | | | | Use kmem_cache_zalloc() instead of kmem_cache_alloc() with flag GFP_ZERO. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * rbd: use KMEM_CACHE macroGeliang Tang2016-03-251-8/+2
| | | | | | | | | | | | | | Use KMEM_CACHE() instead of kmem_cache_create() to simplify the code. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * ceph: use lookup request to revalidate dentryYan, Zheng2016-03-252-0/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | | If dentry has no lease, ceph_d_revalidate() previously return 0. This causes VFS to invalidate the dentry and create a new dentry for later lookup. Invalidating a dentry also detach any underneath mount points. So mount point inside cephfs can disapear mystically (even the mount point is not modified by other hosts). The fix is using lookup request to revalidate dentry without lease. This can partly solve the mount points disapear issue (as long as the mount point is not modified by other hosts) Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: kill ceph_get_dentry_parent_inode()Yan, Zheng2016-03-252-20/+5
| | | | | | | | | | | | use vfs helper dget_parent() instead Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: fix security xattr deadlockYan, Zheng2016-03-258-11/+125
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When security is enabled, security module can call filesystem's getxattr/setxattr callbacks during d_instantiate(). For cephfs, d_instantiate() is usually called by MDS' dispatch thread, while handling MDS reply. If the MDS reply does not include xattrs and corresponding caps, getxattr/setxattr need to send a new request to MDS and waits for the reply. This makes MDS' dispatch sleep, nobody handles later MDS replies. The fix is make sure lookup/atomic_open reply include xattrs and corresponding caps. So getxattr can be handled by cached xattrs. This requires some modification to both MDS and request message. (Client tells MDS what caps it wants; MDS encodes proper caps in the reply) Smack security module may call setxattr during d_instantiate(). Unlike getxattr, we can't force MDS to issue CEPH_CAP_XATTR_EXCL to us. So just make setxattr return error when called by MDS' dispatch thread. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: don't request vxattrs from MDSYan, Zheng2016-03-251-2/+4
| | | | | | | | | | | | It's uselese because MDS reply does not carry any vxattr. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: fix mounting same fs multiple timesYan, Zheng2016-03-251-18/+15
| | | | | | | | | | | | | | Now __ceph_open_session() only accepts closed client. An opened client will tigger BUG_ON(). Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: remove unnecessary NULL checkYan, Zheng2016-03-251-2/+2
| | | | | | | | | | | | | | | | If page->mapping is NULL, releasepage() callback does not get called. Remove the unnecessary NULL check to make static code analysis tool happy Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: avoid updating directory inode's i_size accidentallyYan, Zheng2016-03-251-0/+4
| | | | | | | | | | | | Directory inode's i_size is used by readdir cache. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: fix race during filling readdir cacheYan, Zheng2016-03-251-2/+7
| | | | | | | | | | | | | | | | | | Readdir cache uses page cache to save dentry pointers. When adding dentry pointers to middle of a page, we need to make sure the page already exists. Otherwise the beginning part of the page will be invalid pointers. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * libceph: use sizeof_footer() moreIlya Dryomov2016-03-251-16/+3
| | | | | | | | | | | | | | | | | | Don't open-code sizeof_footer() in read_partial_message() and ceph_msg_revoke(). Also, after switching to sizeof_footer(), it's now possible to use con_out_kvec_add() in prepare_write_message_footer(). Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Alex Elder <elder@linaro.org>
| * ceph: kill ceph_empty_snapcIlya Dryomov2016-03-254-34/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ceph_empty_snapc->num_snaps == 0 at all times. Passing such a snapc to ceph_osdc_alloc_request() (possibly through ceph_osdc_new_request()) is equivalent to passing NULL, as ceph_osdc_alloc_request() uses it only for sizing the request message. Further, in all four cases the subsequent ceph_osdc_build_request() is passed NULL for snapc, meaning that 0 is encoded for seq and num_snaps and making ceph_empty_snapc entirely useless. The two cases where it actually mattered were removed in commits 860560904962 ("ceph: avoid sending unnessesary FLUSHSNAP message") and 23078637e054 ("ceph: fix queuing inode to mdsdir's snaprealm"). Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Yan, Zheng <zyan@redhat.com>
| * ceph: fix a wrong comparisonAnton Protopopov2016-03-251-1/+1
| | | | | | | | | | | | | | | | A negative value rc compared to the positive value ENOENT in the finish_read() function. Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com> Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: replace CURRENT_TIME by current_fs_time()Deepa Dinamani2016-03-254-6/+6
| | | | | | | | | | | | | | | | | | CURRENT_TIME macro is not appropriate for filesystems as it doesn't use the right granularity for filesystem timestamps. Use current_fs_time() instead. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: scattered page writebackYan, Zheng2016-03-251-109/+196
| | | | | | | | | | | | | | | | | | | | This patch makes ceph_writepages_start() try using single OSD request to write all dirty pages within a strip unit. When a nonconsecutive dirty page is found, ceph_writepages_start() tries starting a new write operation to existing OSD request. If it succeeds, it uses the new operation to writeback the dirty page. Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * libceph: add helper that duplicates last extent operationYan, Zheng2016-03-252-0/+24
| | | | | | | | | | | | | | | | | | | | This helper duplicates last extent operation in OSD request, then adjusts the new extent operation's offset and length. The helper is for scatterd page writeback, which adds nonconsecutive dirty pages to single OSD request. Signed-off-by: Yan, Zheng <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * libceph: enable large, variable-sized OSD requestsIlya Dryomov2016-03-253-19/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Turn r_ops into a flexible array member to enable large, consisting of up to 16 ops, OSD requests. The use case is scattered writeback in cephfs and, as far as the kernel client is concerned, 16 is just a made up number. r_ops had size 3 for copyup+hint+write, but copyup is really a special case - it can only happen once. ceph_osd_request_cache is therefore stuffed with num_ops=2 requests, anything bigger than that is allocated with kmalloc(). req_mempool is backed by ceph_osd_request_cache, which means either num_ops=1 or num_ops=2 for use_mempool=true - all existing users (ceph_writepages_start(), ceph_osdc_writepages()) are fine with that. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * libceph: osdc->req_mempool should be backed by a slab poolIlya Dryomov2016-03-251-2/+2
| | | | | | | | | | | | | | | | ceph_osd_request_cache was introduced a long time ago. Also, osd_req is about to get a flexible array member, which ceph_osd_request_cache is going to be aware of. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * libceph: make r_request msg_size calculation clearerIlya Dryomov2016-03-251-10/+11
| | | | | | | | | | | | | | | | | | | | Although msg_size is calculated correctly, the terms are grouped in a misleading way - snaps appears to not have room for a u32 length. Move calculation closer to its use and regroup terms. No functional change. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * libceph: move r_reply_op_{len,result} into struct ceph_osd_req_opYan, Zheng2016-03-253-5/+6
| | | | | | | | | | | | | | | | This avoids defining large array of r_reply_op_{len,result} in in struct ceph_osd_request. Signed-off-by: Yan, Zheng <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * libceph: rename ceph_osd_req_op::payload_len to indata_lenIlya Dryomov2016-03-252-7/+7
| | | | | | | | | | | | | | Follow userspace nomenclature on this - the next commit adds outdata_len. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * ceph: remove useless BUG_ONYan, Zheng2016-03-251-2/+0
| | | | | | | | | | | | ceph_osdc_start_request() never return -EOLDSNAP Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: don't enable rbytes mount option by defaultYan, Zheng2016-03-252-4/+3
| | | | | | | | | | | | | | | | When rbytes mount option is enabled, directory size is recursive size. Recursive size is not updated instantly. This can cause directory size to change between successive stat(1) Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * ceph: encode ctime in cap messageYan, Zheng2016-03-251-4/+7
| | | | | | | | Signed-off-by: Yan, Zheng <zyan@redhat.com>
| * libceph: behave in mon_fault() if cur_mon < 0Ilya Dryomov2016-03-251-14/+9
| | | | | | | | | | | | | | | | | | | | | | | | This can happen if __close_session() in ceph_monc_stop() races with a connection reset. We need to ignore such faults, otherwise it's likely we would take !hunting, call __schedule_delayed() and end up with delayed_work() executing on invalid memory, among other things. The (two!) con->private tests are useless, as nothing ever clears con->private. Nuke them. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * libceph: reschedule tick in mon_fault()Ilya Dryomov2016-03-251-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | Doing __schedule_delayed() in the hunting branch is pointless, as the tick will have already been scheduled by then. What we need to do instead is *reschedule* it in the !hunting branch, after reopen_session() changes hunt_mult, which affects the delay. This helps with spacing out connection attempts and avoiding things like two back-to-back attempts followed by a longer period of waiting around. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * libceph: introduce and switch to reopen_session()Ilya Dryomov2016-03-251-17/+16
| | | | | | | | | | | | | | | | hunting is now set in __open_session() and cleared in finish_hunting(), instead of all around. The "session lost" message is printed not only on connection resets, but also on keepalive timeouts. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * libceph: monc hunt rate is 3s with backoff up to 30sIlya Dryomov2016-03-253-9/+22
| | | | | | | | | | | | | | | | | | | | | | Unless we are in the process of setting up a client (i.e. connecting to the monitor cluster for the first time), apply a backoff: every time we want to reopen a session, increase our timeout by a multiple (currently 2); when we complete the connection, reduce that multipler by 50%. Mirrors ceph.git commit 794c86fd289bd62a35ed14368fa096c46736e9a2. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * libceph: monc ping rate is 10sIlya Dryomov2016-03-253-9/+5
| | | | | | | | | | | | | | | | | | | | | | Split ping interval and ping timeout: ping interval is 10s; keepalive timeout is 30s. Make monc_ping_timeout a constant while at it - it's not actually exported as a mount option (and the rest of tick-related settings won't be either), so it's got no place in ceph_options. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * libceph: pick a different monitor when reconnectingIlya Dryomov2016-03-251-28/+57
| | | | | | | | | | | | | | | | | | | | | | | | | | Don't try to reconnect to the same monitor when we fail to establish a session within a timeout or it's lost. For that, pick_new_mon() needs to see the old value of cur_mon, so don't clear it in __close_session() - all calls to __close_session() but one are followed by __open_session() anyway. __open_session() is only called when a new session needs to be established, so the "already open?" branch, which is now in the way, is simply dropped. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * libceph: revamp subs code, switch to SUBSCRIBE2 protocolIlya Dryomov2016-03-258-95/+174
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is currently hard-coded in the mon_client that mdsmap and monmap subs are continuous, while osdmap sub is always "onetime". To better handle full clusters/pools in the osd_client, we need to be able to issue continuous osdmap subs. Revamp subs code to allow us to specify for each sub whether it should be continuous or not. Although not strictly required for the above, switch to SUBSCRIBE2 protocol while at it, eliminating the ambiguity between a request for "every map since X" and a request for "just the latest" when we don't have a map yet (i.e. have epoch 0). SUBSCRIBE2 feature bit is now required - it's been supported since pre-argonaut (2010). Move "got mdsmap" call to the end of ceph_mdsc_handle_map() - calling in before we validate the epoch and successfully install the new map can mess up mon_client sub state. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * libceph: decouple hunting and subs managementIlya Dryomov2016-03-251-9/+22
| | | | | | | | | | | | | | Coupling hunting state with subscribe state is not a good idea. Clear hunting when we complete the authentication handshake. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| * libceph: move debugfs initialization into __ceph_open_session()Ilya Dryomov2016-03-252-51/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Our debugfs dir name is a concatenation of cluster fsid and client unique ID ("global_id"). It used to be the case that we learned global_id first, nowadays we always learn fsid first - the monmap is sent before any auth replies are. ceph_debugfs_client_init() call in ceph_monc_handle_map() is therefore never executed and can be removed. Its counterpart in handle_auth_reply() doesn't really belong there either: having to do monc->client and unlocking early to work around lockdep is a testament to that. Move it into __ceph_open_session(), where it can be called unconditionally. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
* | Merge tag 'ofs-pull-tag-1' of ↵Linus Torvalds2016-03-2633-0/+11243
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux Pull orangefs filesystem from Mike Marshall. This finally merges the long-pending orangefs filesystem, which has been much cleaned up with input from Al Viro over the last six months. From the documentation file: "OrangeFS is an LGPL userspace scale-out parallel storage system. It is ideal for large storage problems faced by HPC, BigData, Streaming Video, Genomics, Bioinformatics. Orangefs, originally called PVFS, was first developed in 1993 by Walt Ligon and Eric Blumer as a parallel file system for Parallel Virtual Machine (PVM) as part of a NASA grant to study the I/O patterns of parallel programs. Orangefs features include: - Distributes file data among multiple file servers - Supports simultaneous access by multiple clients - Stores file data and metadata on servers using local file system and access methods - Userspace implementation is easy to install and maintain - Direct MPI support - Stateless" see Documentation/filesystems/orangefs.txt for more in-depth details. * tag 'ofs-pull-tag-1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux: (174 commits) orangefs: fix orangefs_superblock locking orangefs: fix do_readv_writev() handling of error halfway through orangefs: have ->kill_sb() evict the VFS side of things first orangefs: sanitize ->llseek() orangefs-bufmap.h: trim unused junk orangefs: saner calling conventions for getting a slot orangefs_copy_{to,from}_bufmap(): don't pass bufmap pointer orangefs: get rid of readdir_handle_s ornagefs: ensure that truncate has an up to date inode size orangefs: move code which sets i_link to orangefs_inode_getattr orangefs: remove needless wrapper around GFP_KERNEL orangefs: remove wrapper around mutex_lock(&inode->i_mutex) orangefs: refactor inode type or link_target change detection orangefs: use new getattr for revalidate and remove old getattr orangefs: use new getattr in inode getattr and permission orangefs: use new orangefs_inode_getattr to get size in write and llseek orangefs: use new orangefs_inode_getattr to create new inodes orangefs: rename orangefs_inode_getattr to orangefs_inode_old_getattr orangefs: remove inode->i_lock wrapper orangefs: put register_chrdev immediately before register_filesystem ...
| * | orangefs: fix orangefs_superblock lockingAl Viro2016-03-263-58/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * switch orangefs_remount() to taking ORANGEFS_SB(sb) instead of sb * remove from the list _before_ orangefs_unmount() - request_mutex in the latter will make sure that nothing observed in the loop in ORANGEFS_DEV_REMOUNT_ALL handling will get freed until the end of loop * on removal, keep the forward pointer and zero the back one. That way we can drop and regain the spinlock in the loop body (again, ORANGEFS_DEV_REMOUNT_ALL one) and still be able to get to the rest of the list. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Mike Marshall <hubcap@omnibond.com>
| * | orangefs: fix do_readv_writev() handling of error halfway throughAl Viro2016-03-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Error should only be returned if nothing had been read/written. Otherwise we need to report a short read/write instead. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Mike Marshall <hubcap@omnibond.com>
| * | orangefs: have ->kill_sb() evict the VFS side of things firstAl Viro2016-03-251-3/+3
| | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Mike Marshall <hubcap@omnibond.com>
| * | orangefs: sanitize ->llseek()Al Viro2016-03-252-10/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | a) open files can't have NULL inodes b) it's SEEK_END, not ORANGEFS_SEEK_END; no need to get cute. c) make_bad_inode() on lseek()? Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Mike Marshall <hubcap@omnibond.com>
| * | orangefs-bufmap.h: trim unused junkAl Viro2016-03-251-9/+0
| | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Mike Marshall <hubcap@omnibond.com>
| * | orangefs: saner calling conventions for getting a slotAl Viro2016-03-254-28/+16
| | | | | | | | | | | | | | | | | | | | | | | | just have it return the slot number or -E... - the caller checks the sign anyway Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Mike Marshall <hubcap@omnibond.com>
| * | orangefs_copy_{to,from}_bufmap(): don't pass bufmap pointerAl Viro2016-03-253-23/+14
| | | | | | | | | | | | | | | | | | | | | it's always __orangefs_bufmap Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Mike Marshall <hubcap@omnibond.com>
| * | orangefs: get rid of readdir_handle_sAl Viro2016-03-251-63/+30
| | | | | | | | | | | | | | | | | | | | | | | | no point, really - we couldn't keep those across the calls of getdents(); it would be too easy to DoS, having all slots exhausted. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Mike Marshall <hubcap@omnibond.com>
| * | ornagefs: ensure that truncate has an up to date inode sizeMartin Brandenburg2016-03-231-1/+12
| | | | | | | | | | | | | | | Signed-off-by: Martin Brandenburg <martin@omnibond.com> Signed-off-by: Mike Marshall <hubcap@omnibond.com>
| * | orangefs: move code which sets i_link to orangefs_inode_getattrMartin Brandenburg2016-03-232-2/+1
| | | | | | | | | | | | | | | | | | | | | Everything else setting inode->i_ values is in there. Signed-off-by: Martin Brandenburg <martin@omnibond.com> Signed-off-by: Mike Marshall <hubcap@omnibond.com>
| * | orangefs: remove needless wrapper around GFP_KERNELMartin Brandenburg2016-03-232-5/+1
| | | | | | | | | | | | | | | Signed-off-by: Martin Brandenburg <martin@omnibond.com> Signed-off-by: Mike Marshall <hubcap@omnibond.com>
| * | orangefs: remove wrapper around mutex_lock(&inode->i_mutex)Martin Brandenburg2016-03-231-6/+2
| | | | | | | | | | | | | | | Signed-off-by: Martin Brandenburg <martin@omnibond.com> Signed-off-by: Mike Marshall <hubcap@omnibond.com>
| * | orangefs: refactor inode type or link_target change detectionMartin Brandenburg2016-03-231-41/+36
| | | | | | | | | | | | | | | Signed-off-by: Martin Brandenburg <martin@omnibond.com> Signed-off-by: Mike Marshall <hubcap@omnibond.com>
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