Commit Graph

602850 Commits

Author SHA1 Message Date
Dan Carpenter
2b11885921 nfsd: remove some dead code in nfsd_create_locked()
We changed this around in f135af1041f ('nfsd: reorganize nfsd_create')
so "dchild" can't be an error pointer any more.  Also, dchild can't be
NULL here (and dput would already handle this even if it was).

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-08-04 17:11:53 -04:00
J. Bruce Fields
fa08139d5e nfsd: drop unnecessary MAY_EXEC check from create
We need an fh_verify to make sure we at least have a dentry, but actual
permission checks happen later.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-08-04 17:11:52 -04:00
J. Bruce Fields
7142327449 nfsd: clean up bad-type check in nfsd_create_locked
Minor cleanup, no change in behavior.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-08-04 17:11:51 -04:00
J. Bruce Fields
d03d9fe476 nfsd: remove unnecessary positive-dentry check
vfs_{create,mkdir,mknod} each begin with a call to may_create(), which
returns EEXIST if the object already exists.

This check is therefore unnecessary.

(In the NFSv2 case, nfsd_proc_create also has such a check.  Contrary to
RFC 1094, our code seems to believe that a CREATE of an existing file
should succeed.  I'm leaving that behavior alone.)

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-08-04 17:11:50 -04:00
J. Bruce Fields
b44061d0b9 nfsd: reorganize nfsd_create
There's some odd logic in nfsd_create() that allows it to be called with
the parent directory either locked or unlocked.  The only already-locked
caller is NFSv2's nfsd_proc_create().  It's less confusing to split out
the unlocked case into a separate function which the NFSv2 code can call
directly.

Also fix some comments while we're here.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-08-04 17:11:49 -04:00
J. Bruce Fields
e75b23f9e3 nfsd: check d_can_lookup in fh_verify of directories
Create and other nfsd ops generally assume we can call lookup_one_len on
inodes with S_IFDIR set.  Al says that this assumption isn't true in
general, though it should be for the filesystem objects nfsd sees.

Add a check just to make sure our assumption isn't violated.

Remove a couple checks for i_op->lookup in create code.

Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-08-04 17:11:48 -04:00
J. Bruce Fields
12391d0723 nfsd: remove redundant zero-length check from create
lookup_one_len already has this check.

The only effect of this patch is to return access instead of perm in the
0-length-filename case.  I actually prefer nfserr_perm (or _inval?), but
I doubt anyone cares.

The isdotent check seems redundant too, but I worry that some client
might actually care about that strange nfserr_exist error.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-08-04 17:11:47 -04:00
Oleg Drokin
7eed34f18d nfsd: Make creates return EEXIST instead of EACCES
When doing a create (mkdir/mknod) on a name, it's worth
checking the name exists first before returning EACCES in case
the directory is not writeable by the user.
This makes return values on the client more consistent
regardless of whenever the entry there is cached in the local
cache or not.
Another positive side effect is certain programs only expect
EEXIST in that case even despite POSIX allowing any valid
error to be returned.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-08-04 17:11:46 -04:00
Trond Myklebust
c7995f8a70 SUNRPC: Detect immediate closure of accepted sockets
This modification is useful for debugging issues that happen while
the socket is being initialised.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-08-01 17:53:42 -04:00
Trond Myklebust
b2f21f7d85 SUNRPC: accept() may return sockets that are still in SYN_RECV
We're seeing traces of the following form:

 [10952.396347] svc: transport ffff88042ba4a 000 dequeued, inuse=2
 [10952.396351] svc: tcp_accept ffff88042ba4 a000 sock ffff88042a6e4c80
 [10952.396362] nfsd: connect from 10.2.6.1, port=187
 [10952.396364] svc: svc_setup_socket ffff8800b99bcf00
 [10952.396368] setting up TCP socket for reading
 [10952.396370] svc: svc_setup_socket created ffff8803eb10a000 (inet ffff88042b75b800)
 [10952.396373] svc: transport ffff8803eb10a000 put into queue
 [10952.396375] svc: transport ffff88042ba4a000 put into queue
 [10952.396377] svc: server ffff8800bb0ec000 waiting for data (to = 3600000)
 [10952.396380] svc: transport ffff8803eb10a000 dequeued, inuse=2
 [10952.396381] svc_recv: found XPT_CLOSE
 [10952.396397] svc: svc_delete_xprt(ffff8803eb10a000)
 [10952.396398] svc: svc_tcp_sock_detach(ffff8803eb10a000)
 [10952.396399] svc: svc_sock_detach(ffff8803eb10a000)
 [10952.396412] svc: svc_sock_free(ffff8803eb10a000)

i.e. an immediate close of the socket after initialisation.

The culprit appears to be the test at the end of svc_tcp_init, which
checks if the newly created socket is in the TCP_ESTABLISHED state,
and immediately closes it if not. The evidence appears to suggest that
the socket might still be in the SYN_RECV state at this time.

The fix is to check for both states, and then to add a check in
svc_tcp_state_change() to ensure we don't close the socket when
it transitions into TCP_ESTABLISHED.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-08-01 17:53:41 -04:00
Jeff Layton
8a4c392688 nfsd: allow nfsd to advertise multiple layout types
If the underlying filesystem supports multiple layout types, then there
is little reason not to advertise that fact to clients and let them
choose what type to use.

Turn the ex_layout_type field into a bitfield. For each supported
layout type, we set a bit in that field. When the client requests a
layout, ensure that the bit for that layout type is set. When the
client requests attributes, send back a list of supported types.

Signed-off-by: Jeff Layton <jlayton@poochiereds.net>
Reviewed-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-15 15:31:32 -04:00
Chuck Lever
885848186f nfsd: Close race between nfsd4_release_lockowner and nfsd4_lock
nfsd4_release_lockowner finds a lock owner that has no lock state,
and drops cl_lock. Then release_lockowner picks up cl_lock and
unhashes the lock owner.

During the window where cl_lock is dropped, I don't see anything
preventing a concurrent nfsd4_lock from finding that same lock owner
and adding lock state to it.

Move release_lockowner() into nfsd4_release_lockowner and hang onto
the cl_lock until after the lock owner's state cannot be found
again.

Found by inspection, we don't currently have a reproducer.

Fixes: 2c41beb0e5 ("nfsd: reduce cl_lock thrashing in ... ")
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-15 15:31:31 -04:00
Kinglong Mee
dd51db1886 nfsd/blocklayout: Make sure calculate signature/designator length aligned
These values are all multiples of 4 already, so there's no change in
behavior from this patch.  But perhaps this will prevent mistakes in the
future.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-15 15:31:30 -04:00
Benjamin Coddington
15d66ac209 xfs: abstract block export operations from nfsd layouts
Instead of creeping pnfs layout configuration into filesystems, move the
definition of block-based export operations under a more abstract
configuration.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-15 15:31:29 -04:00
Trond Myklebust
f4a4906e56 SUNRPC: Remove unused callback xpo_adjust_wspace()
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:53:50 -04:00
Trond Myklebust
637600f3ff SUNRPC: Change TCP socket space reservation
The current server rpc tcp code attempts to predict how much writeable
socket space will be available to a given RPC call before accepting it
for processing.  On a 40GigE network, we've found this throttles
individual clients long before the network or disk is saturated.  The
server may handle more clients easily, but the bandwidth of individual
clients is still artificially limited.

Instead of trying (and failing) to predict how much writeable socket space
will be available to the RPC call, just fall back to the simple model of
deferring processing until the socket is uncongested.

This may increase the risk of fast clients starving slower clients; in
such cases, the previous patch allows setting a hard per-connection
limit.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:53:49 -04:00
Trond Myklebust
ff3ac5c3dc SUNRPC: Add a server side per-connection limit
Allow the user to limit the number of requests serviced through a single
connection, to help prevent faster clients from starving slower clients.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:53:48 -04:00
Trond Myklebust
4720b0703a SUNRPC: Micro optimisation for svc_data_ready
Don't call svc_xprt_enqueue() if the XPT_DATA flag is already set.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:53:46 -04:00
Trond Myklebust
fa9251afc3 SUNRPC: Call the default socket callbacks instead of open coding
Rather than code up our own versions of the socket callbacks, just
call the defaults.
This also allows us to merge svc_udp_data_ready() and svc_tcp_data_ready().

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:53:45 -04:00
Trond Myklebust
069c225b88 SUNRPC: lock the socket while detaching it
Prevent callbacks from triggering while we're detaching the socket.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:53:44 -04:00
Trond Myklebust
104f6351f7 SUNRPC: Add tracepoints for dropped and deferred requests
Dropping and/or deferring requests has an impact on performance. Let's
make sure we can trace those events.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:53:43 -04:00
Trond Myklebust
82ea2d7615 SUNRPC: Add a tracepoint for server socket out-of-space conditions
Add a tracepoint to track when the processing of incoming RPC data gets
deferred due to out-of-space issues on the outgoing transport.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:53:42 -04:00
Christophe JAILLET
d28c442f5b nfsd: Fix some indent inconsistancy
Silent a few smatch warnings about indentation

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:53:41 -04:00
Oleg Drokin
93f580a9a2 nfsd: Correct a comment for NFSD_MAY_ defines location
Those are now defined in fs/nfsd/vfs.h

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Reviewed-by: Jeff Layton <jlayton@poochiereds.net>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:53:40 -04:00
Tom Haynes
9b9960a0ca nfsd: Add a super simple flex file server
Have a simple flex file server where the mds (NFSv4.1 or NFSv4.2)
is also the ds (NFSv3). I.e., the metadata and the data file are
the exact same file.

This will allow testing of the flex file client.

Simply add the "pnfs" export option to your export
in /etc/exports and mount from a client that supports
flex files.

Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:40:48 -04:00
Tom Haynes
d7c920d134 nfsd: flex file device id encoding will need the server address
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@poochiereds.net>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:40:47 -04:00
Scott Mayhew
04d70edada sunrpc: add gss minor status to svcauth_gss_proxy_init
GSS-Proxy doesn't produce very much debug logging at all.  Printing out
the gss minor status will aid in troubleshooting if the
GSS_Accept_sec_context upcall fails.

Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:40:46 -04:00
Andrew Elble
ed94164398 nfsd: implement machine credential support for some operations
This addresses the conundrum referenced in RFC5661 18.35.3,
and will allow clients to return state to the server using the
machine credentials.

The biggest part of the problem is that we need to allow the client
to send a compound op with integrity/privacy on mounts that don't
have it enabled.

Add server support for properly decoding and using spo_must_enforce
and spo_must_allow bits. Add support for machine credentials to be
used for CLOSE, OPEN_DOWNGRADE, LOCKU, DELEGRETURN,
and TEST/FREE STATEID.
Implement a check so as to not throw WRONGSEC errors when these
operations are used if integrity/privacy isn't turned on.

Without this, Linux clients with credentials that expired while holding
delegations were getting stuck in an endless loop.

Signed-off-by: Andrew Elble <aweits@rit.edu>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:32:47 -04:00
Andrew Elble
dedeb13f9e nfsd: allow mach_creds_match to be used more broadly
Rename mach_creds_match() to nfsd4_mach_creds_match() and un-staticify

Signed-off-by: Andrew Elble <aweits@rit.edu>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:32:47 -04:00
Andrew Elble
1adf0c5a44 nfs/nfsd: Move useful bitfield ops to a commonly accessible place
So these may be used in nfsd as well

Signed-off-by: Andrew Elble <aweits@rit.edu>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:32:47 -04:00
NeilBrown
d8d29138b1 sunrpc: remove 'inuse' flag from struct cache_detail.
This field is not currently in use.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-13 15:32:47 -04:00
Trond Myklebust
db1bb44c4c SUNRPC: Don't allocate a full sockaddr_storage for tracing
We're always tracing IPv4 or IPv6 addresses, so we can save a lot
of space on the ringbuffer by allocating the correct sockaddr size.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org
Fixes: 83a712e0af "sunrpc: add some tracepoints around ..."
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-01 16:28:44 -04:00
Miklos Szeredi
6343a21208 locks: use file_inode()
(Another one for the f_path debacle.)

ltp fcntl33 testcase caused an Oops in selinux_file_send_sigiotask.

The reason is that generic_add_lease() used filp->f_path.dentry->inode
while all the others use file_inode().  This makes a difference for files
opened on overlayfs since the former will point to the overlay inode the
latter to the underlying inode.

So generic_add_lease() added the lease to the overlay inode and
generic_delete_lease() removed it from the underlying inode.  When the file
was released the lease remained on the overlay inode's lock list, resulting
in use after free.

Reported-by: Eryu Guan <eguan@redhat.com>
Fixes: 4bacc9c923 ("overlayfs: Make f_path always point to the overlay and f_inode to the underlay")
Cc: <stable@vger.kernel.org>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-07-01 10:24:18 -04:00
Scott Mayhew
cb7d224f82 lockd: unregister notifier blocks if the service fails to come up completely
If the lockd service fails to start up then we need to be sure that the
notifier blocks are not registered, otherwise a subsequent start of the
service could cause the same notifier to be registered twice, leading to
soft lockups.

Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 0751ddf77b "lockd: Register callbacks on the inetaddr_chain..."
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2016-06-30 16:35:07 -04:00
Linus Torvalds
4c2e07c6a2 Linux 4.7-rc5 2016-06-26 17:52:03 -07:00
Linus Torvalds
2ac9b9735b SCSI fixes on 20160625
Two straightforward fixes.  One is a concurrency issue only affecting
 SAS connected SATA drives, but which could hang the storage subsystem
 if it triggers (because the outstanding command count on error never
 goes back to zero) and the other is a NO_TAG fallout from the switch
 to hostwide tags which causes the system to crash on module insertion
 (we've checked carefully and only the 53c700 family of drivers is
 vulnerable to this issue).
 
 Signed-off-by: James Bottomley <jejb@linux.vnet.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Two straightforward fixes.

  One is a concurrency issue only affecting SAS connected SATA drives,
  but which could hang the storage subsystem if it triggers (because the
  outstanding command count on error never goes back to zero) and the
  other is a NO_TAG fallout from the switch to hostwide tags which
  causes the system to crash on module insertion (we've checked
  carefully and only the 53c700 family of drivers is vulnerable to this
  issue)"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  53c700: fix BUG on untagged commands
  scsi: fix race between simultaneous decrements of ->host_failed
2016-06-26 10:08:49 -07:00
Linus Torvalds
da2f6aba4a Merge branch 'for-linus-4.7-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes part 2 from Chris Mason:
 "This has one patch from Omar to bring iterate_shared back to btrfs.

  We have a tree of work we queue up for directory items and it doesn't
  lend itself well to shared access.  While we're cleaning it up, Omar
  has changed things to use an exclusive lock when there are delayed
  items"

* 'for-linus-4.7-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: fix ->iterate_shared() by upgrading i_rwsem for delayed nodes
2016-06-25 08:53:38 -07:00
Linus Torvalds
b971712afc Merge branch 'for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
 "I have a two part pull this time because one of the patches Dave
  Sterba collected needed to be against v4.7-rc2 or higher (we used
  rc4).  I try to make my for-linus-xx branch testable on top of the
  last major so we can hand fixes to people on the list more easily, so
  I've split this pull in two.

  This first part has some fixes and two performance improvements that
  we've been testing for some time.

  Josef's two performance fixes are most notable.  The transid tracking
  patch makes a big improvement on pretty much every workload"

* 'for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: Force stripesize to the value of sectorsize
  btrfs: fix disk_i_size update bug when fallocate() fails
  Btrfs: fix error handling in map_private_extent_buffer
  Btrfs: fix error return code in btrfs_init_test_fs()
  Btrfs: don't do nocow check unless we have to
  btrfs: fix deadlock in delayed_ref_async_start
  Btrfs: track transid for delayed ref flushing
2016-06-25 08:42:31 -07:00
Linus Torvalds
ca83a55c9f sound fixes for 4.7-rc5
Again pretty calm weeks: we've had only a few trivial / stable
 HD-audio fixes in addition to a possible race fix for snd-dummy
 driver spotted by syzkaller.
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Merge tag 'sound-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Again pretty calm weeks: we've had only a few trivial / stable
  HD-audio fixes in addition to a possible race fix for snd-dummy driver
  spotted by syzkaller"

* tag 'sound-4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: dummy: Fix a use-after-free at closing
  ALSA: hda / realtek - add two more Thinkpad IDs (5050,5053) for tpt460 fixup
  ALSA: hda - Fix the headset mic jack detection on Dell machine
  ALSA: hda/tegra: iomem fixups for sparse warnings
  ALSA: hdac_regmap - fix the register access for runtime PM
2016-06-25 06:55:48 -07:00
Linus Torvalds
9a949a9859 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 kprobe fix from Thomas Gleixner:
 "A single fix clearing the TF bit when a fault is single stepped"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  kprobes/x86: Clear TF bit in fault on single-stepping
2016-06-25 06:49:32 -07:00
Linus Torvalds
57801c1b81 Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Thomas Gleixner:
 "A couple of scheduler fixes:

   - force watchdog reset while processing sysrq-w

   - fix a deadlock when enabling trace events in the scheduler

   - fixes to the throttled next buddy logic

   - fixes for the average accounting (missing serialization and
     underflow handling)

   - allow kernel threads for fallback to online but not active cpus"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/core: Allow kthreads to fall back to online && !active cpus
  sched/fair: Do not announce throttled next buddy in dequeue_task_fair()
  sched/fair: Initialize throttle_count for new task-groups lazily
  sched/fair: Fix cfs_rq avg tracking underflow
  kernel/sysrq, watchdog, sched/core: Reset watchdog on all CPUs while processing sysrq-w
  sched/debug: Fix deadlock when enabling sched events
  sched/fair: Fix post_init_entity_util_avg() serialization
2016-06-25 06:38:42 -07:00
Omar Sandoval
02dbfc99b4 Btrfs: fix ->iterate_shared() by upgrading i_rwsem for delayed nodes
Commit fe742fd4f9 ("Revert "btrfs: switch to ->iterate_shared()"")
backed out the conversion to ->iterate_shared() for Btrfs because the
delayed inode handling in btrfs_real_readdir() is racy. However, we can
still do readdir in parallel if there are no delayed nodes.

This is a temporary fix which upgrades the shared inode lock to an
exclusive lock only when we have delayed items until we come up with a
more complete solution. While we're here, rename the
btrfs_{get,put}_delayed_items functions to make it very clear that
they're just for readdir.

Tested with xfstests and by doing a parallel kernel build:

	while make tinyconfig && make -j4 && git clean dqfx; do
		:
	done

along with a bunch of parallel finds in another shell:

	while true; do
		for ((i=0; i<4; i++)); do
			find . >/dev/null &
		done
		wait
	done

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
2016-06-25 06:20:10 -07:00
Linus Torvalds
e3b22bc3d7 Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fix from Thomas Gleixner:
 "A single fix to address a race in the static key logic"

* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/static_key: Fix concurrent static_key_slow_inc()
2016-06-25 06:14:44 -07:00
Linus Torvalds
2de23071f5 Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fix from Thomas Gleixner:
 "A single fix for the fallout from the conversion of MIPS GIC to irq
  domains"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/mips-gic: Fix IRQs in gic_dev_domain
2016-06-25 06:09:59 -07:00
Linus Torvalds
2f6e97477b powerpc fixes for 4.7 #4
- mm/radix: Update to tlb functions ric argument from Aneesh Kumar K.V
  - mm/radix: Flush page walk cache when freeing page table from Aneesh Kumar K.V
  - mm/hash: Use the correct PPP mask when updating HPTE from Aneesh Kumar K.V
  - mm/hash: Don't add memory coherence if cache inhibited is set from Aneesh Kumar K.V
  - mm/radix: Update Radix tree size as per ISA 3.0 from Aneesh Kumar K.V
  - eeh: Fix invalid cached PE primary bus from Gavin Shan
  - Fix faults caused by radix patching of SLB miss handler from Michael Ellerman
  - bpf/jit: Disable classic BPF JIT on ppc64le from Naveen N. Rao
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Merge tag 'powerpc-4.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "mm/radix (Aneesh Kumar K.V):
   - Update to tlb functions ric argument
   - Flush page walk cache when freeing page table
   - Update Radix tree size as per ISA 3.0

  mm/hash (Aneesh Kumar K.V):
   - Use the correct PPP mask when updating HPTE
   - Don't add memory coherence if cache inhibited is set

  eeh (Gavin Shan):
   - Fix invalid cached PE primary bus

  bpf/jit (Naveen N. Rao):
   - Disable classic BPF JIT on ppc64le

  .. and fix faults caused by radix patching of SLB miss handler
  (Michael Ellerman)"

* tag 'powerpc-4.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/bpf/jit: Disable classic BPF JIT on ppc64le
  powerpc: Fix faults caused by radix patching of SLB miss handler
  powerpc/eeh: Fix invalid cached PE primary bus
  powerpc/mm/radix: Update Radix tree size as per ISA 3.0
  powerpc/mm/hash: Don't add memory coherence if cache inhibited is set
  powerpc/mm/hash: Use the correct PPP mask when updating HPTE
  powerpc/mm/radix: Flush page walk cache when freeing page table
  powerpc/mm/radix: Update to tlb functions ric argument
2016-06-25 06:01:48 -07:00
Michael Ellerman
9521d39976 Fix build break in fork.c when THREAD_SIZE < PAGE_SIZE
Commit b235beea9e ("Clarify naming of thread info/stack allocators")
breaks the build on some powerpc configs, where THREAD_SIZE < PAGE_SIZE:

  kernel/fork.c:235:2: error: implicit declaration of function 'free_thread_stack'
  kernel/fork.c:355:8: error: assignment from incompatible pointer type
    stack = alloc_thread_stack_node(tsk, node);
    ^

Fix it by renaming free_stack() to free_thread_stack(), and updating the
return type of alloc_thread_stack_node().

Fixes: b235beea9e ("Clarify naming of thread info/stack allocators")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-06-25 06:01:28 -07:00
Linus Torvalds
086e3eb65e Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
 "Two weeks worth of fixes here"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (41 commits)
  init/main.c: fix initcall_blacklisted on ia64, ppc64 and parisc64
  autofs: don't get stuck in a loop if vfs_write() returns an error
  mm/page_owner: avoid null pointer dereference
  tools/vm/slabinfo: fix spelling mistake: "Ocurrences" -> "Occurrences"
  fs/nilfs2: fix potential underflow in call to crc32_le
  oom, suspend: fix oom_reaper vs. oom_killer_disable race
  ocfs2: disable BUG assertions in reading blocks
  mm, compaction: abort free scanner if split fails
  mm: prevent KASAN false positives in kmemleak
  mm/hugetlb: clear compound_mapcount when freeing gigantic pages
  mm/swap.c: flush lru pvecs on compound page arrival
  memcg: css_alloc should return an ERR_PTR value on error
  memcg: mem_cgroup_migrate() may be called with irq disabled
  hugetlb: fix nr_pmds accounting with shared page tables
  Revert "mm: disable fault around on emulated access bit architecture"
  Revert "mm: make faultaround produce old ptes"
  mailmap: add Boris Brezillon's email
  mailmap: add Antoine Tenart's email
  mm, sl[au]b: add __GFP_ATOMIC to the GFP reclaim mask
  mm: mempool: kasan: don't poot mempool objects in quarantine
  ...
2016-06-24 19:08:33 -07:00
Linus Torvalds
aebe9bb85e Round two of 4.7 rc fixes
- A couple minor fixes to the rdma core
 - Multiple minor fixes to hfi1
 - Multiple minor fixes to mlx4/mlx4
 - A few minor fixes to i40iw
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

Pull rdma fixes from Doug Ledford:
 "This is the second batch of queued up rdma patches for this rc cycle.

  There isn't anything really major in here.  It's passed 0day,
  linux-next, and local testing across a wide variety of hardware.
  There are still a few known issues to be tracked down, but this should
  amount to the vast majority of the rdma RC fixes.

  Round two of 4.7 rc fixes:

   - A couple minor fixes to the rdma core
   - Multiple minor fixes to hfi1
   - Multiple minor fixes to mlx4/mlx4
   - A few minor fixes to i40iw"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (31 commits)
  IB/srpt: Reduce QP buffer size
  i40iw: Enable level-1 PBL for fast memory registration
  i40iw: Return correct max_fast_reg_page_list_len
  i40iw: Correct status check on i40iw_get_pble
  i40iw: Correct CQ arming
  IB/rdmavt: Correct qp_priv_alloc() return value test
  IB/hfi1: Don't zero out qp->s_ack_queue in rvt_reset_qp
  IB/hfi1: Fix deadlock with txreq allocation slow path
  IB/mlx4: Prevent cross page boundary allocation
  IB/mlx4: Fix memory leak if QP creation failed
  IB/mlx4: Verify port number in flow steering create flow
  IB/mlx4: Fix error flow when sending mads under SRIOV
  IB/mlx4: Fix the SQ size of an RC QP
  IB/mlx5: Fix wrong naming of port_rcv_data counter
  IB/mlx5: Fix post send fence logic
  IB/uverbs: Initialize ib_qp_init_attr with zeros
  IB/core: Fix false search of the IB_SA_WELL_KNOWN_GUID
  IB/core: Fix RoCE v1 multicast join logic issue
  IB/core: Fix no default GIDs when netdevice reregisters
  IB/hfi1: Send a pkey change event on driver pkey update
  ...
2016-06-24 18:52:31 -07:00
Linus Torvalds
3fb5e59c88 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Pull HID fix from Jiri Kosina:
 "hiddev ioctl() validation fix from Scott Bauer"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
  HID: hiddev: validate num_values for HIDIOCGUSAGES, HIDIOCSUSAGES commands
2016-06-24 18:43:58 -07:00
Linus Torvalds
260eaba4ea Improve fan type detection for dell-smm to prevent kernel hang
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Merge tag 'hwmon-for-linus-v4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fix from Guenter Roeck:
 "Improve fan type detection for dell-smm to prevent kernel hang"

* tag 'hwmon-for-linus-v4.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (dell-smm) Cache fan_type() calls and change fan detection
2016-06-24 18:36:15 -07:00