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v2: add a __break_lease tracepoint for non-blocking case
Recently, I needed these to help track down a softlockup when recalling a
delegation, but they might be helpful in other situations as well.
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: Jeff Layton <jlayton@poochiereds.net>
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Replace seq_printf where possible
Cc: Jeff Layton <jlayton@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Jeff Layton <jlayton@poochiereds.net>
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lease codepaths
Currently, the fl_owner isn't set for flock locks. Some filesystems use
byte-range locks to simulate flock locks and there is a common idiom in
those that does:
fl->fl_owner = (fl_owner_t)filp;
fl->fl_start = 0;
fl->fl_end = OFFSET_MAX;
Since flock locks are generally "owned" by the open file description,
move this into the common flock lock setup code. The fl_start and fl_end
fields are already set appropriately, so remove the unneeded setting of
that in flock ops in those filesystems as well.
Finally, the lease code also sets the fl_owner as if they were owned by
the process and not the open file description. This is incorrect as
leases have the same ownership semantics as flock locks. Set them the
same way. The lease code doesn't actually use the fl_owner value for
anything, so this is more for consistency's sake than a bugfix.
Reported-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Jeff Layton <jlayton@poochiereds.net>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> (Staging portion)
Acked-by: J. Bruce Fields <bfields@fieldses.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next
Pull scheduler updates from Ingo Molnar:
"The main scheduling related changes in this cycle were:
- various sched/numa updates, for better performance
- tree wide cleanup of open coded nice levels
- nohz fix related to rq->nr_running use
- cpuidle changes and continued consolidation to improve the
kernel/sched/idle.c high level idle scheduling logic. As part of
this effort I pulled cpuidle driver changes from Rafael as well.
- standardized idle polling amongst architectures
- continued work on preparing better power/energy aware scheduling
- sched/rt updates
- misc fixlets and cleanups"
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (49 commits)
sched/numa: Decay ->wakee_flips instead of zeroing
sched/numa: Update migrate_improves/degrades_locality()
sched/numa: Allow task switch if load imbalance improves
sched/rt: Fix 'struct sched_dl_entity' and dl_task_time() comments, to match the current upstream code
sched: Consolidate open coded implementations of nice level frobbing into nice_to_rlimit() and rlimit_to_nice()
sched: Initialize rq->age_stamp on processor start
sched, nohz: Change rq->nr_running to always use wrappers
sched: Fix the rq->next_balance logic in rebalance_domains() and idle_balance()
sched: Use clamp() and clamp_val() to make sys_nice() more readable
sched: Do not zero sg->cpumask and sg->sgp->power in build_sched_groups()
sched/numa: Fix initialization of sched_domain_topology for NUMA
sched: Call select_idle_sibling() when not affine_sd
sched: Simplify return logic in sched_read_attr()
sched: Simplify return logic in sched_copy_attr()
sched: Fix exec_start/task_hot on migrated tasks
arm64: Remove TIF_POLLING_NRFLAG
metag: Remove TIF_POLLING_NRFLAG
sched/idle: Make cpuidle_idle_call() void
sched/idle: Reflow cpuidle_idle_call()
sched/idle: Delay clearing the polling bit
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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Replace various -20/+19 hardcoded nice values with MIN_NICE/MAX_NICE.
Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/ff13819fd09b7a5dba5ab5ae797f2e7019bdfa17.1394532288.git.yangds.fnst@cn.fujitsu.com
Cc: devel@driverdev.osuosl.org
Cc: devicetree@vger.kernel.org
Cc: fcoe-devel@open-fcoe.org
Cc: linux390@de.ibm.com
Cc: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: linux-s390@vger.kernel.org
Cc: linux-scsi@vger.kernel.org
Cc: nbd-general@lists.sourceforge.net
Cc: ocfs2-devel@oss.oracle.com
Cc: openipmi-developer@lists.sourceforge.net
Cc: qla2xxx-upstream@qlogic.com
Cc: linux-arch@vger.kernel.org
[ Consolidated the patches, twiddled the changelog. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next
Pull core locking updates from Ingo Molnar:
"The main changes in this cycle were:
- reduced/streamlined smp_mb__*() interface that allows more usecases
and makes the existing ones less buggy, especially in rarer
architectures
- add rwsem implementation comments
- bump up lockdep limits"
* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
rwsem: Add comments to explain the meaning of the rwsem's count field
lockdep: Increase static allocations
arch: Mass conversion of smp_mb__*()
arch,doc: Convert smp_mb__*()
arch,xtensa: Convert smp_mb__*()
arch,x86: Convert smp_mb__*()
arch,tile: Convert smp_mb__*()
arch,sparc: Convert smp_mb__*()
arch,sh: Convert smp_mb__*()
arch,score: Convert smp_mb__*()
arch,s390: Convert smp_mb__*()
arch,powerpc: Convert smp_mb__*()
arch,parisc: Convert smp_mb__*()
arch,openrisc: Convert smp_mb__*()
arch,mn10300: Convert smp_mb__*()
arch,mips: Convert smp_mb__*()
arch,metag: Convert smp_mb__*()
arch,m68k: Convert smp_mb__*()
arch,m32r: Convert smp_mb__*()
arch,ia64: Convert smp_mb__*()
...
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Mostly scripted conversion of the smp_mb__* barriers.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/n/tip-55dhyhocezdw1dg7u19hmh1u@git.kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-arch@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core into next
Pull driver core / kernfs changes from Greg KH:
"Here is the "big" pull request for 3.16-rc1.
Not a lot of changes here, some kernfs work, a revert of a very old
driver core change that ended up cauing some memory leaks on driver
probe error paths, and other minor things.
As was pointed out earlier today, one commit here, 26fc9cd200ec
("kernfs: move the last knowledge of sysfs out from kernfs") is also
needed in your 3.15-final branch as well. If you could cherry-pick it
there, it would be most appreciated by Andy Lutomirski to prevent a
regression there.
All of these have been in linux-next for a while"
* tag 'driver-core-3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
crypto/nx/nx-842: dev_set_drvdata can no longer fail
kernfs: move the last knowledge of sysfs out from kernfs
sysfs: fix attribute_group bin file path on removal
sysfs.h: don't return a void-valued expression in sysfs_remove_file
init.h: Update initcall_sync variants to fix build errors
driver core: Inline dev_set/get_drvdata
driver core: dev_get_drvdata: Don't check for NULL dev
driver core: dev_set_drvdata returns void
driver core: dev_set_drvdata can no longer fail
driver core: Move driver_data back to struct device
lib/devres.c: fix checkpatch warnings
lib/devres.c: use dev in devm_request_and_ioremap
kobject: Make support for uevent_helper optional.
kernfs: make kernfs_notify() trigger inotify events too
kernfs: implement kernfs_root->supers list
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There is still one residue of sysfs remaining: the sb_magic
SYSFS_MAGIC. However this should be kernfs user specific,
so this patch moves it out. Kerrnfs user should specify their
magic number while mouting.
Signed-off-by: Jianyu Zhan <nasa4836@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Cody Schafer already fixed binary file creation for attribute groups, see [1].
This patch makes the appropriate changes for binary file removal
of attribute groups.
[1]: http://lkml.org/lkml/2014/2/27/832
Signed-off-by: Robert ABEL <rabel@cit-ec.uni-bielefeld.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We want the kernfs fixes in this branch as well for testing.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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kernfs_notify() is used to indicate either new data is available or
the content of a file has changed. It currently only triggers poll
which may not be the most convenient to monitor especially when there
are a lot to monitor. Let's hook it up to fsnotify too so that the
events can be monitored via inotify too.
fsnotify_modify() requires file * but kernfs_notify() doesn't have any
specific file associated; however, we can walk all super_blocks
associated with a kernfs_root and as kernfs always associate one ino
with inode and one dentry with an inode, it's trivial to look up the
dentry associated with a given kernfs_node. As any active monitor
would pin dentry, just looking up existing dentry is enough. This
patch looks up the dentry associated with the specified kernfs_node
and generates events equivalent to fsnotify_modify().
Note that as fsnotify doesn't provide fsnotify_modify() equivalent
which can be called with dentry, kernfs_notify() directly calls
fsnotify_parent() and fsnotify(). It might be better to add a wrapper
in fsnotify.h instead.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: John McCutchan <john@johnmccutchan.com>
Cc: Robert Love <rlove@rlove.org>
Cc: Eric Paris <eparis@parisplace.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Currently, there's no way to find out which super_blocks are
associated with a given kernfs_root. Let's implement it - the planned
inotify extension to kernfs_notify() needs it.
Make kernfs_super_info point back to the super_block and chain it at
kernfs_root->supers.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Pull block core updates from Jens Axboe:
"It's a big(ish) round this time, lots of development effort has gone
into blk-mq in the last 3 months. Generally we're heading to where
3.16 will be a feature complete and performant blk-mq. scsi-mq is
progressing nicely and will hopefully be in 3.17. A nvme port is in
progress, and the Micron pci-e flash driver, mtip32xx, is converted
and will be sent in with the driver pull request for 3.16.
This pull request contains:
- Lots of prep and support patches for scsi-mq have been integrated.
All from Christoph.
- API and code cleanups for blk-mq from Christoph.
- Lots of good corner case and error handling cleanup fixes for
blk-mq from Ming Lei.
- A flew of blk-mq updates from me:
* Provide strict mappings so that the driver can rely on the CPU
to queue mapping. This enables optimizations in the driver.
* Provided a bitmap tagging instead of percpu_ida, which never
really worked well for blk-mq. percpu_ida relies on the fact
that we have a lot more tags available than we really need, it
fails miserably for cases where we exhaust (or are close to
exhausting) the tag space.
* Provide sane support for shared tag maps, as utilized by scsi-mq
* Various fixes for IO timeouts.
* API cleanups, and lots of perf tweaks and optimizations.
- Remove 'buffer' from struct request. This is ancient code, from
when requests were always virtually mapped. Kill it, to reclaim
some space in struct request. From me.
- Remove 'magic' from blk_plug. Since we store these on the stack
and since we've never caught any actual bugs with this, lets just
get rid of it. From me.
- Only call part_in_flight() once for IO completion, as includes two
atomic reads. Hopefully we'll get a better implementation soon, as
the part IO stats are now one of the more expensive parts of doing
IO on blk-mq. From me.
- File migration of block code from {mm,fs}/ to block/. This
includes bio.c, bio-integrity.c, bounce.c, and ioprio.c. From me,
from a discussion on lkml.
That should describe the meat of the pull request. Also has various
little fixes and cleanups from Dave Jones, Shaohua Li, Duan Jiong,
Fengguang Wu, Fabian Frederick, Randy Dunlap, Robert Elliott, and Sam
Bradshaw"
* 'for-3.16/core' of git://git.kernel.dk/linux-block: (100 commits)
blk-mq: push IPI or local end_io decision to __blk_mq_complete_request()
blk-mq: remember to start timeout handler for direct queue
block: ensure that the timer is always added
blk-mq: blk_mq_unregister_hctx() can be static
blk-mq: make the sysfs mq/ layout reflect current mappings
blk-mq: blk_mq_tag_to_rq should handle flush request
block: remove dead code in scsi_ioctl:blk_verify_command
blk-mq: request initialization optimizations
block: add queue flag for disabling SG merging
block: remove 'magic' from struct blk_plug
blk-mq: remove alloc_hctx and free_hctx methods
blk-mq: add file comments and update copyright notices
blk-mq: remove blk_mq_alloc_request_pinned
blk-mq: do not use blk_mq_alloc_request_pinned in blk_mq_map_request
blk-mq: remove blk_mq_wait_for_tags
blk-mq: initialize request in __blk_mq_alloc_request
blk-mq: merge blk_mq_alloc_reserved_request into blk_mq_alloc_request
blk-mq: add helper to insert requests from irq context
blk-mq: remove stale comment for blk_mq_complete_request()
blk-mq: allow non-softirq completions
...
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Like commit f9c78b2b, move this block related file outside
of fs/ and into the core block directory, block/.
Signed-off-by: Jens Axboe <axboe@fb.com>
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They really belong in block/, especially now since it's not in
drivers/block/ anymore. Additionally, the get_maintainer script
gets it wrong when in fs/.
Suggested-by: Christoph Hellwig <hch@infradead.org>
Acked-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Jens Axboe <axboe@fb.com>
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nr_segs is no longer used in bio_alloc_map_data since c8db444820a1e3
("block: Don't save/copy bvec array anymore")
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
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bs is no longer used in biovec_create_pool since 9f060e2231ca96 ("block:
Convert integrity to bvec_alloc_bs()")
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Jens Axboe <axboe@fb.com>
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Fix new kernel-doc warnings in fs/bio.c:
Warning(fs/bio.c:316): No description found for parameter 'bio'
Warning(fs/bio.c:316): No description found for parameter 'parent'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
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lock_parent() very much on purpose does nested locking of dentries, and
is careful to maintain the right order (lock parent first). But because
it didn't annotate the nested locking order, lockdep thought it might be
a deadlock on d_lock, and complained.
Add the proper annotation for the inner locking of the child dentry to
make lockdep happy.
Introduced by commit 046b961b45f9 ("shrink_dentry_list(): take parent's
->d_lock earlier").
Reported-and-tested-by: Josh Boyer <jwboyer@fedoraproject.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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it's 1 in the only remaining caller.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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We have the same problem with ->d_lock order in the inner loop, where
we are dropping references to ancestors. Same solution, basically -
instead of using dentry_kill() we use lock_parent() (introduced in the
previous commit) to get that lock in a safe way, recheck ->d_count
(in case if lock_parent() has ended up dropping and retaking ->d_lock
and somebody managed to grab a reference during that window), trylock
the inode->i_lock and use __dentry_kill() to do the rest.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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The cause of livelocks there is that we are taking ->d_lock on
dentry and its parent in the wrong order, forcing us to use
trylock on the parent's one. d_walk() takes them in the right
order, and unfortunately it's not hard to create a situation
when shrink_dentry_list() can't make progress since trylock
keeps failing, and shrink_dcache_parent() or check_submounts_and_drop()
keeps calling d_walk() disrupting the very shrink_dentry_list() it's
waiting for.
Solution is straightforward - if that trylock fails, let's unlock
the dentry itself and take locks in the right order. We need to
stabilize ->d_parent without holding ->d_lock, but that's doable
using RCU. And we'd better do that in the very beginning of the
loop in shrink_dentry_list(), since the checks on refcount, etc.
would need to be redone anyway.
That deals with a half of the problem - killing dentries on the
shrink list itself. Another one (dropping their parents) is
in the next commit.
locking parent is interesting - it would be easy to do rcu_read_lock(),
lock whatever we think is a parent, lock dentry itself and check
if the parent is still the right one. Except that we need to check
that *before* locking the dentry, or we are risking taking ->d_lock
out of order. Fortunately, once the D1 is locked, we can check if
D2->d_parent is equal to D1 without the need to lock D2; D2->d_parent
can start or stop pointing to D1 only under D1->d_lock, so taking
D1->d_lock is enough. In other words, the right solution is
rcu_read_lock/lock what looks like parent right now/check if it's
still our parent/rcu_read_unlock/lock the child.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Result will be massaged to saner shape in the next commits. It is
ugly, no questions - the point of that one is to be a provably
equivalent transformation (and it might be worth splitting a bit
more).
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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... into trylocks and everything else. The latter (actual killing)
is __dentry_kill().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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It can happen only when dentry_kill() is called with unlock_on_failure
equal to 0 - other callers had dentry pinned until the moment they've
got ->d_lock and DCACHE_DENTRY_KILLED is set only after lockref_mark_dead().
IOW, only one of three call sites of dentry_kill() might end up reaching
that code. Just move it there.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Commit 6130f5315ee8 "switch vmsplice_to_user() to copy_page_to_iter()" in
v3.15-rc1 broke vmsplice(2).
This patch fixes two bugs:
- count is not initialized to a proper value, which resulted in no data
being copied
- if rw_copy_check_uvector() returns negative then the iov might be leaked.
Tested OK.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
Pull AFS fixes and cleanups from David Howells:
"Here are some patches to the AFS filesystem:
1) Fix problems in the clean-up parts of the cache manager service
handler.
2) Split afs_end_call() introduced in (1) and replace some identical
code elsewhere with a call to the first half of the split function.
3) Fix an error introduced in the workqueue PREPARE_WORK() elimination
commits.
4) Clean up argument passing to functions called from the workqueue as
there's now an insulating layer between them and the workqueue.
This is possible from (3)"
* 'afs' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
AFS: Pass an afs_call* to call->async_workfn() instead of a work_struct*
AFS: Fix kafs module unloading
AFS: Part of afs_end_call() is identical to code elsewhere, so split it
AFS: Fix cache manager service handlers
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call->async_workfn() can take an afs_call* arg rather than a work_struct* as
the functions assigned there are now called from afs_async_workfn() which has
to call container_of() anyway.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Nathaniel Wesley Filardo <nwf@cs.jhu.edu>
Reviewed-by: Tejun Heo <tj@kernel.org>
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At present, it is not possible to successfully unload the kafs module if there
are outstanding async outgoing calls (those made with afs_make_call()). This
appears to be due to the changes introduced by:
commit 059499453a9abd1857d442b44da8b4c126dc72a8
Author: Tejun Heo <tj@kernel.org>
Date: Fri Mar 7 10:24:50 2014 -0500
Subject: afs: don't use PREPARE_WORK
which didn't go far enough. The problem is due to:
(1) The aforementioned commit introduced a separate handler function pointer
in the call, call->async_workfn, in addition to the original workqueue
item, call->async_work, for asynchronous operations because workqueues
subsystem cannot handle the workqueue item pointer being changed whilst
the item is queued or being processed.
(2) afs_async_workfn() was introduced in that commit to be the callback for
call->async_work. Its sole purpose is to run whatever call->async_workfn
points to.
(3) call->async_workfn is only used from afs_async_workfn(), which is only
set on async_work by afs_collect_incoming_call() - ie. for incoming
calls.
(4) call->async_workfn is *not* set by afs_make_call() when outgoing calls are
made, and call->async_work is set afs_process_async_call() - and not
afs_async_workfn().
(5) afs_process_async_call() now changes call->async_workfn rather than
call->async_work to point to afs_delete_async_call() to clean up, but this
is only effective for incoming calls because call->async_work does not
point to afs_async_workfn() for outgoing calls.
(6) Because, for incoming calls, call->async_work remains pointing to
afs_process_async_call() this results in an infinite loop.
Instead, make the workqueue uniformly vector through call->async_workfn, via
afs_async_workfn() and simply initialise call->async_workfn to point to
afs_process_async_call() in afs_make_call().
Signed-off-by: Nathaniel Wesley Filardo <nwf@cs.jhu.edu>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Tejun Heo <tj@kernel.org>
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Split afs_end_call() into two pieces, one of which is identical to code in
afs_process_async_call(). Replace the latter with a call to the first part of
afs_end_call().
Signed-off-by: Nathaniel Wesley Filardo <nwf@cs.jhu.edu>
Signed-off-by: David Howells <dhowells@redhat.com>
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Fix the cache manager RPC service handlers. The afs_send_empty_reply() and
afs_send_simple_reply() functions:
(a) Kill the call and free up the buffers associated with it if they fail.
(b) Return with call intact if it they succeed.
However, none of the callers actually check the result or clean up if
successful - and may use the now non-existent data if it fails.
This was detected by Dan Carpenter using a static checker:
The patch 08e0e7c82eea: "[AF_RXRPC]: Make the in-kernel AFS
filesystem use AF_RXRPC." from Apr 26, 2007, leads to the following
static checker warning:
"fs/afs/cmservice.c:155 SRXAFSCB_CallBack()
warn: 'call' was already freed."
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David Howells <dhowells@redhat.com>
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Pull two nfsd bugfixes from Bruce Fields:
"Just two bugfixes, one for a merge-window-introduced ACL regression,
the other for a longer-standing v4 state bug"
* 'for-3.15' of git://linux-nfs.org/~bfields/linux:
nfsd4: warn on finding lockowner without stateid's
nfsd4: remove lockowner when removing lock stateid
nfsd4: fix corruption on setting an ACL.
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The current code assumes a one-to-one lockowner<->lock stateid
correspondance.
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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The nfsv4 state code has always assumed a one-to-one correspondance
between lock stateid's and lockowners even if it appears not to in some
places.
We may actually change that, but for now when FREE_STATEID releases a
lock stateid it also needs to release the parent lockowner.
Symptoms were a subsequent LOCK crashing in find_lockowner_str when it
calls same_lockowner_ino on a lockowner that unexpectedly has an empty
so_stateids list.
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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As of 06f9cc12caa862f5bc86ebdb4f77568a4bef0167 "nfsd4: don't create
unnecessary mask acl", any non-trivial ACL will be left with an
unitialized entry, and a trivial ACL may write one entry beyond what's
allocated.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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In dlm_init, if create dlm_lockname_cache failed in
dlm_init_master_caches, it will destroy dlm_lockres_cache which created
before twice. And this will cause system die when loading modules.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull two btrfs fixes from Chris Mason:
"This has two fixes that we've been testing for 3.16, but since both
are safe and fix real bugs, it makes sense to send for 3.15 instead"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: send, fix incorrect ref access when using extrefs
Btrfs: fix EIO on reading file after ioctl clone works on it
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When running send, if an inode only has extended reference items
associated to it and no regular references, send.c:get_first_ref()
was incorrectly assuming the reference it found was of type
BTRFS_INODE_REF_KEY due to use of the wrong key variable.
This caused weird behaviour when using the found item has a regular
reference, such as weird path string, and occasionally (when lucky)
a crash:
[ 190.600652] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC
[ 190.600994] Modules linked in: btrfs xor raid6_pq binfmt_misc nfsd auth_rpcgss oid_registry nfs_acl nfs lockd fscache sunrpc psmouse serio_raw evbug pcspkr i2c_piix4 e1000 floppy
[ 190.602565] CPU: 2 PID: 14520 Comm: btrfs Not tainted 3.13.0-fdm-btrfs-next-26+ #1
[ 190.602728] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 190.602868] task: ffff8800d447c920 ti: ffff8801fa79e000 task.ti: ffff8801fa79e000
[ 190.603030] RIP: 0010:[<ffffffff813266b4>] [<ffffffff813266b4>] memcpy+0x54/0x110
[ 190.603262] RSP: 0018:ffff8801fa79f880 EFLAGS: 00010202
[ 190.603395] RAX: ffff8800d4326e3f RBX: 000000000000036a RCX: ffff880000000000
[ 190.603553] RDX: 000000000000032a RSI: ffe708844042936a RDI: ffff8800d43271a9
[ 190.603710] RBP: ffff8801fa79f8c8 R08: 00000000003a4ef0 R09: 0000000000000000
[ 190.603867] R10: 793a4ef09f000000 R11: 9f0000000053726f R12: ffff8800d43271a9
[ 190.604020] R13: 0000160000000000 R14: ffff8802110134f0 R15: 000000000000036a
[ 190.604020] FS: 00007fb423d09b80(0000) GS:ffff880216200000(0000) knlGS:0000000000000000
[ 190.604020] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 190.604020] CR2: 00007fb4229d4b78 CR3: 00000001f5d76000 CR4: 00000000000006e0
[ 190.604020] Stack:
[ 190.604020] ffffffffa01f4d49 ffff8801fa79f8f0 00000000000009f9 ffff8801fa79f8c8
[ 190.604020] 00000000000009f9 ffff880211013260 000000000000f971 ffff88021147dba8
[ 190.604020] 00000000000009f9 ffff8801fa79f918 ffffffffa02367f5 ffff8801fa79f928
[ 190.604020] Call Trace:
[ 190.604020] [<ffffffffa01f4d49>] ? read_extent_buffer+0xb9/0x120 [btrfs]
[ 190.604020] [<ffffffffa02367f5>] fs_path_add_from_extent_buffer+0x45/0x60 [btrfs]
[ 190.604020] [<ffffffffa0238806>] get_first_ref+0x1f6/0x210 [btrfs]
[ 190.604020] [<ffffffffa0238994>] __get_cur_name_and_parent+0x174/0x3a0 [btrfs]
[ 190.604020] [<ffffffff8118df3d>] ? kmem_cache_alloc_trace+0x11d/0x1e0
[ 190.604020] [<ffffffffa0236674>] ? fs_path_alloc+0x24/0x60 [btrfs]
[ 190.604020] [<ffffffffa0238c91>] get_cur_path+0xd1/0x240 [btrfs]
(...)
Steps to reproduce (either crash or some weirdness like an odd path string):
mkfs.btrfs -f -O extref /dev/sdd
mount /dev/sdd /mnt
mkdir /mnt/testdir
touch /mnt/testdir/foobar
for i in `seq 1 2550`; do
ln /mnt/testdir/foobar /mnt/testdir/foobar_link_`printf "%04d" $i`
done
ln /mnt/testdir/foobar /mnt/testdir/final_foobar_name
rm -f /mnt/testdir/foobar
for i in `seq 1 2550`; do
rm -f /mnt/testdir/foobar_link_`printf "%04d" $i`
done
btrfs subvolume snapshot -r /mnt /mnt/mysnap
btrfs send /mnt/mysnap -f /tmp/mysnap.send
Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Chris Mason <clm@fb.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
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For inline data extent, we need to make its length aligned, otherwise,
we can get a phantom extent map which confuses readpages() to return -EIO.
This can be detected by xfstests/btrfs/035.
Reported-by: David Disseldorp <ddiss@suse.de>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>
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Pull xfs fixes from Dave Chinner:
"Code inspection of the XFS error number sign translations found a
bunch of issues, including returning incorrectly signed errors for
some data integrity operations.
These leak to userspace and result in applications not getting the
errors correctly reported. Hence they need fixing sooner rather than
later.
A couple of the bugs are in data integrity operations, a couple more
are in the new COLLAPSE_RANGE code. One of these came in through a
recent ext4 merge and so I had to update the base tree to 3.15-rc5
before fixing the issues"
* tag 'xfs-for-linus-3.15-rc6' of git://oss.sgi.com/xfs/xfs:
xfs: list_lru_init returns a negative error
xfs: negate xfs_icsb_init_counters error value
xfs: negate mount workqueue init error value
xfs: fix wrong err sign on xfs_set_acl()
xfs: fix wrong errno from xfs_initxattrs
xfs: correct error sign on COLLAPSE_RANGE errors
xfs: xfs_commit_metadata returns wrong errno
xfs: fix incorrect error sign in xfs_file_aio_read
xfs: xfs_dir_fsync() returns positive errno
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And we don't invert it properly when initialising the dquot lru
list.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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