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Merge fixes from Andrew Morton:
"13 fixes. The acerhdf patches aren't (really) fixes. But they've
been stuck in my tree for up to two years, sent to Matthew multiple
times and the developers are unhappy."
* emailed from Andrew Morton <akpm@linux-foundation.org>: (13 patches)
mm: fix NULL ptr dereference in move_pages
mm: fix NULL ptr dereference in migrate_pages
revert "proc: clear_refs: do not clear reserved pages"
drivers/rtc/rtc-ds1307.c: fix BUG shown with lock debugging enabled
arch/arm/mach-ux500/mbox-db5500.c: world-writable sysfs fifo file
hugetlbfs: lockdep annotate root inode properly
acerhdf: lowered default temp fanon/fanoff values
acerhdf: add support for new hardware
acerhdf: add support for Aspire 1410 BIOS v1.3314
fs/buffer.c: remove BUG() in possible but rare condition
mm: fix up the vmscan stat in vmstat
epoll: clear the tfile_check_list on -ELOOP
mm/hugetlb: fix warning in alloc_huge_page/dequeue_huge_page_vma
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Pull NFS client bugfixes from Trond Myklebust:
- Fix NFSv4 infinite loops on open(O_TRUNC)
- Fix an Oops and an infinite loop in the NFSv4 flock code
- Don't register the PipeFS filesystem until it has been set up
- Fix an Oops in nfs_try_to_update_request
- Don't reuse NFSv4 open owners: fixes a bad sequence id storm.
* tag 'nfs-for-3.4-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFSv4: Keep dropped state owners on the LRU list for a while
NFSv4: Ensure that we don't drop a state owner more than once
NFSv4: Ensure we do not reuse open owner names
nfs: Enclose hostname in brackets when needed in nfs_do_root_mount
NFS: put open context on error in nfs_flush_multi
NFS: put open context on error in nfs_pagein_multi
NFSv4: Fix open(O_TRUNC) and ftruncate() error handling
NFSv4: Ensure that we check lock exclusive/shared type against open modes
NFSv4: Ensure that the LOCK code sets exception->inode
NFS: check for req==NULL in nfs_try_to_update_request cleanup
SUNRPC: register PipeFS file system after pernet sybsystem
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Revert commit 85e72aa5384 ("proc: clear_refs: do not clear reserved
pages"), which was a quick fix suitable for -stable until ARM had been
moved over to the gate_vma mechanism:
https://lkml.org/lkml/2012/1/14/55
With commit f9d4861f ("ARM: 7294/1: vectors: use gate_vma for vectors user
mapping"), ARM does now use the gate_vma, so the PageReserved check can be
removed from the proc code.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Cc: Nicolas Pitre <nico@linaro.org>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This fixes the below reported false lockdep warning. e096d0c7e2e4
("lockdep: Add helper function for dir vs file i_mutex annotation") added
a similar annotation for every other inode in hugetlbfs but missed the
root inode because it was allocated by a separate function.
For HugeTLB fs we allow taking i_mutex in mmap. HugeTLB fs doesn't
support file write and its file read callback is modified in a05b0855fd
("hugetlbfs: avoid taking i_mutex from hugetlbfs_read()") to not take
i_mutex. Hence for HugeTLB fs with regular files we really don't take
i_mutex with mmap_sem held.
======================================================
[ INFO: possible circular locking dependency detected ]
3.4.0-rc1+ #322 Not tainted
-------------------------------------------------------
bash/1572 is trying to acquire lock:
(&mm->mmap_sem){++++++}, at: [<ffffffff810f1618>] might_fault+0x40/0x90
but task is already holding lock:
(&sb->s_type->i_mutex_key#12){+.+.+.}, at: [<ffffffff81125f88>] vfs_readdir+0x56/0xa8
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&sb->s_type->i_mutex_key#12){+.+.+.}:
[<ffffffff810a09e5>] lock_acquire+0xd5/0xfa
[<ffffffff816a2f5e>] __mutex_lock_common+0x48/0x350
[<ffffffff816a3325>] mutex_lock_nested+0x2a/0x31
[<ffffffff811fb8e1>] hugetlbfs_file_mmap+0x7d/0x104
[<ffffffff810f859a>] mmap_region+0x272/0x47d
[<ffffffff810f8a39>] do_mmap_pgoff+0x294/0x2ee
[<ffffffff810f8b65>] sys_mmap_pgoff+0xd2/0x10e
[<ffffffff8103d19e>] sys_mmap+0x1d/0x1f
[<ffffffff816a5922>] system_call_fastpath+0x16/0x1b
-> #0 (&mm->mmap_sem){++++++}:
[<ffffffff810a0256>] __lock_acquire+0xa81/0xd75
[<ffffffff810a09e5>] lock_acquire+0xd5/0xfa
[<ffffffff810f1645>] might_fault+0x6d/0x90
[<ffffffff81125d62>] filldir+0x6a/0xc2
[<ffffffff81133a83>] dcache_readdir+0x5c/0x222
[<ffffffff81125fa8>] vfs_readdir+0x76/0xa8
[<ffffffff811260b6>] sys_getdents+0x79/0xc9
[<ffffffff816a5922>] system_call_fastpath+0x16/0x1b
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&sb->s_type->i_mutex_key#12);
lock(&mm->mmap_sem);
lock(&sb->s_type->i_mutex_key#12);
lock(&mm->mmap_sem);
*** DEADLOCK ***
1 lock held by bash/1572:
#0: (&sb->s_type->i_mutex_key#12){+.+.+.}, at: [<ffffffff81125f88>] vfs_readdir+0x56/0xa8
stack backtrace:
Pid: 1572, comm: bash Not tainted 3.4.0-rc1+ #322
Call Trace:
[<ffffffff81699a3c>] print_circular_bug+0x1f8/0x209
[<ffffffff810a0256>] __lock_acquire+0xa81/0xd75
[<ffffffff810f38aa>] ? handle_pte_fault+0x5ff/0x614
[<ffffffff8109e622>] ? mark_lock+0x2d/0x258
[<ffffffff810f1618>] ? might_fault+0x40/0x90
[<ffffffff810a09e5>] lock_acquire+0xd5/0xfa
[<ffffffff810f1618>] ? might_fault+0x40/0x90
[<ffffffff816a3249>] ? __mutex_lock_common+0x333/0x350
[<ffffffff810f1645>] might_fault+0x6d/0x90
[<ffffffff810f1618>] ? might_fault+0x40/0x90
[<ffffffff81125d62>] filldir+0x6a/0xc2
[<ffffffff81133a83>] dcache_readdir+0x5c/0x222
[<ffffffff81125cf8>] ? sys_ioctl+0x74/0x74
[<ffffffff81125cf8>] ? sys_ioctl+0x74/0x74
[<ffffffff81125cf8>] ? sys_ioctl+0x74/0x74
[<ffffffff81125fa8>] vfs_readdir+0x76/0xa8
[<ffffffff811260b6>] sys_getdents+0x79/0xc9
[<ffffffff816a5922>] system_call_fastpath+0x16/0x1b
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Dave Jones <davej@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Josh Boyer <jwboyer@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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While stressing the kernel with with failing allocations today, I hit the
following chain of events:
alloc_page_buffers():
bh = alloc_buffer_head(GFP_NOFS);
if (!bh)
goto no_grow; <= path taken
grow_dev_page():
bh = alloc_page_buffers(page, size, 0);
if (!bh)
goto failed; <= taken, consequence of the above
and then the failed path BUG()s the kernel.
The failure is inserted a litte bit artificially, but even then, I see no
reason why it should be deemed impossible in a real box.
Even though this is not a condition that we expect to see around every
time, failed allocations are expected to be handled, and BUG() sounds just
too much. As a matter of fact, grow_dev_page() can return NULL just fine
in other circumstances, so I propose we just remove it, then.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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An epoll_ctl(,EPOLL_CTL_ADD,,) operation can return '-ELOOP' to prevent
circular epoll dependencies from being created. However, in that case we
do not properly clear the 'tfile_check_list'. Thus, add a call to
clear_tfile_check_list() for the -ELOOP case.
Signed-off-by: Jason Baron <jbaron@redhat.com>
Reported-by: Yurij M. Plotnikov <Yurij.Plotnikov@oktetlabs.ru>
Cc: Nelson Elhage <nelhage@nelhage.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
Tested-by: Alexandra N. Kossovsky <Alexandra.Kossovsky@oktetlabs.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This patch instructs DLM to prevent an "in place" conversion, where the
lock just stays on the granted queue, and instead forces the conversion to
the back of the convert queue. This is done on upward conversions only.
This is useful in cases where, for example, a lock is frequently needed in
PR on one node, but another node needs it temporarily in EX to update it.
This may happen, for example, when the rindex is being updated by gfs2_grow.
The gfs2_grow needs to have the lock in EX, but the other nodes need to
re-read it to retrieve the updates. The glock is already granted in PR on
the non-growing nodes, so this prevents them from continually re-granting
the lock in PR, and forces the EX from gfs2_grow to go through.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 bug fixes from Ted Ts'o:
"These are two low-risk bug fixes for ext4, fixing a compile warning
and a potential deadlock."
* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
super.c: unused variable warning without CONFIG_QUOTA
jbd2: use GFP_NOFS for blkdev_issue_flush
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sb info is only checked with quota support.
fs/ext4/super.c: In function ‘parse_options’:
fs/ext4/super.c:1600:23: warning: unused variable ‘sbi’ [-Wunused-variable]
Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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flush request is issued in transaction commit code path, so looks using
GFP_KERNEL to allocate memory for flush request bio falls into the classic
deadlock issue. I saw btrfs and dm get it right, but ext4, xfs and md are
using GFP.
Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: stable@vger.kernel.org
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git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm
Pull dlm fixes from David Teigland:
"This includes one short patch fixing the behavior of the QUECVT flag,
which the gfs2 folks are waiting on."
* tag 'dlm-fixes-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
dlm: fix QUECVT when convert queue is empty
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The QUECVT flag should not prevent conversions from
being granted immediately when the convert queue is
empty.
Signed-off-by: David Teigland <teigland@redhat.com>
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To ensure that we don't reuse their identifiers.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Retest the RB_EMPTY_NODE() condition under the spin lock
to ensure that we don't call rb_erase() more than once on the
same state owner.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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it's always current->mm
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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... since exit_mmap() is coming and it will munmap() everything anyway.
In all other cases aio_free_ring() has ctx->mm == current->mm; moreover,
all other callers of vm_munmap() have mm == current->mm, so this will
allow us to get rid of mm argument of vm_munmap().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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The NFSv4 spec is ambiguous about whether or not it is permissible
to reuse open owner names, so play it safe. This patch adds a timestamp
to the state_owner structure, and combines that with the IDA based
uniquifier.
Fixes a regression whereby the Linux server returns NFS4ERR_BAD_SEQID.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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This continues the theme started with vm_brk() and vm_munmap():
vm_mmap() does the same thing as do_mmap(), but additionally does the
required VM locking.
This uninlines (and rewrites it to be clearer) do_mmap(), which sadly
duplicates it in mm/mmap.c and mm/nommu.c. But that way we don't have
to export our internal do_mmap_pgoff() function.
Some day we hopefully don't have to export do_mmap() either, if all
modular users can become the simpler vm_mmap() instead. We're actually
very close to that already, with the notable exception of the (broken)
use in i810, and a couple of stragglers in binfmt_elf.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Like the vm_brk() function, this is the same as "do_munmap()", except it
does the VM locking for the caller.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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It does the same thing as "do_brk()", except it handles the VM locking
too.
It turns out that all external callers want that anyway, so we can make
do_brk() static to just mm/mmap.c while at it.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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When hostname contains colon (e.g. when it is an IPv6 address) it needs
to be enclosed in brackets to make parsing of NFS device string possible.
Fix nfs_do_root_mount() to enclose hostname properly when needed. NFS code
actually does not need this as it does not parse the string passed by
nfs_do_root_mount() but the device string is exposed to userspace in
/proc/mounts.
CC: Josh Boyer <jwboyer@redhat.com>
CC: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Cc: <stable@vger.kernel.org>
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Cc: <stable@vger.kernel.org>
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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Pull nfsd bugfixes from J. Bruce Fields:
"One bugfix, and one minor header fix from Jeff Layton while we're
here"
* 'for-3.4' of git://linux-nfs.org/~bfields/linux:
nfsd: include cld.h in the headers_install target
nfsd: don't fail unchecked creates of non-special files
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If the file wasn't opened for writing, then truncate and ftruncate
need to report the appropriate errors.
Reported-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org
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Since we may be simulating flock() locks using NFS byte range locks,
we can't rely on the VFS having checked the file open mode for us.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org
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All callers of nfs4_handle_exception() that need to handle
NFS4ERR_OPENMODE correctly should set exception->inode
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
Pull fuse updates from Miklos Szeredi.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: use flexible array in fuse.h
fuse: allow nanosecond granularity
fuse: O_DIRECT support for files
fuse: fix nlink after unlink
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Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 regression fixes from Ted Ts'o:
"This fixes a scalability problem reported by Andi Kleen and Tim Chen;
they were quite secretive about the precise nature of their workload,
but they later admitted that it only showed up when they were using a
large sparse file, so the amount of data I/O that was needed was close
to zero.
I'm not sure how realistic this is and it's only a regression if you
consider changes made since 2.6.39 to be a "regression" vis-a-vis the
policy regarding post-merge window bug fixes, but Linus agreed it was
worth fixing, so I'm including it in this pull request.
This also fixes the journalled quota mount options, which I
accidentally broke while I was cleaning up the mount option handling."
* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: fix handling of journalled quota options
ext4: address scalability issue by removing extent cache statistics
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro:
"A bunch of endianness fixes and a couple of nfsd error value fixes.
Speaking of endianness stuff, I'm rather tempted to slap
ccflags-y += -D__CHECK_ENDIAN__
in fs/Makefile, if not making it default for the entire tree; nfsd
regressions I've caught make one hell of a pile and we'd obviously
benefit from having that kind of stuff caught earlier..."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
lockd: fix the endianness bug
ocfs2: ->e_leaf_clusters endianness breakage
ocfs2: ->rl_count endianness breakage
ocfs: ->rl_used breakage on big-endian
ocfs2: ->l_next_free_req breakage on big-endian
btrfs: btrfs_root_readonly() broken on big-endian
ext4: fix endianness breakage in ext4_split_extent_at()
nfsd: fix compose_entry_fh() failure exits
nfsd: fix error value on allocation failure in nfsd4_decode_test_stateid()
nfsd: fix endianness breakage in TEST_STATEID handling
nfsd: fix error values returned by nfsd4_lockt() when nfsd_open() fails
nfsd: fix b0rken error value for setattr on read-only mount
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Pull CIFS fixes from Steve French.
* git://git.samba.org/sfrench/cifs-2.6:
Fix number parsing in cifs_parse_mount_options
Cleanup handling of NULL value passed for a mount option
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Commit 26092bf5 broke handling of journalled quota mount options by
trying to parse argument of every mount option as a number. Fix this
by dealing with the quota options before we call match_int().
Thanks to Jan Kara for discovering this regression.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
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Andi Kleen and Tim Chen have reported that under certain circumstances
the extent cache statistics are causing scalability problems due to
cache line bounces.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org
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git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull the minimal btrfs branch from Chris Mason:
"We have a use-after-free in there, along with errors when mount -o
discard is enabled, and a BUG_ON(we should compile with UP more
often)."
* 'for-linus-min' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: use commit root when loading free space cache
Btrfs: fix use-after-free in __btrfs_end_transaction
Btrfs: check return value of bio_alloc() properly
Btrfs: remove lock assert from get_restripe_target()
Btrfs: fix eof while discarding extents
Btrfs: fix uninit variable in repair_eb_io_failure
Revert "Btrfs: increase the global block reserve estimates"
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comparing be32 values for < is not doing the right thing...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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le16, not le32...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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le16, not le32...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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it's le16, not le32 or le64...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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It's le16, not le32...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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->root_flags is __le64 and all accesses to it go through the helpers
that do proper conversions. Except for btrfs_root_readonly(), which
checks bit 0 as in host-endian...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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The function kstrtoul() used to parse number strings in the mount
option parser is set to expect a base 10 number . This treats the octal
numbers passed for mount options such as file_mode as base10 numbers
leading to incorrect behavior.
Change the 'base' argument passed to kstrtoul from 10 to 0 to
allow it to auto-detect the base of the number passed.
Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Acked-by: Jeff Layton <jlayton@samba.org>
Reported-by: Chris Clayton <chris2553@googlemail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
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->ee_len is __le16, so assigning cpu_to_le32() to it is going to do
Bad Things(tm) on big-endian hosts...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Restore the original logics ("fail on mountpoints, negatives and in
case of fh_compose() failures"). Since commit 8177e (nfsd: clean up
readdirplus encoding) that got broken -
rv = fh_compose(fhp, exp, dchild, &cd->fh);
if (rv)
goto out;
if (!dchild->d_inode)
goto out;
rv = 0;
out:
is equivalent to
rv = fh_compose(fhp, exp, dchild, &cd->fh);
out:
and the second check has no effect whatsoever...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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PTR_ERR(NULL) is going to be 0...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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->ts_id_status gets nfs errno, i.e. it's already big-endian; no need
to apply htonl() to it. Broken by commit 174568 (NFSD: Added TEST_STATEID
operation) last year...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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nfsd_open() already returns an NFS error value; only vfs_test_lock()
result needs to be fed through nfserrno(). Broken by commit 55ef12
(nfsd: Ensure nfsv4 calls the underlying filesystem on LOCKT)
three years ago...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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..._want_write() returns -EROFS on failure, _not_ an NFS error value.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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A user reported that booting his box up with btrfs root on 3.4 was way
slower than on 3.3 because I removed the ideal caching code. It turns out
that we don't load the free space cache if we're in a commit for deadlock
reasons, but since we're reading the cache and it hasn't changed yet we are
safe reading the inode and free space item from the commit root, so do that
and remove all of the deadlock checks so we don't unnecessarily skip loading
the free space cache. The user reported this fixed the slowness. Thanks,
Tested-by: Calvin Walton <calvin.walton@kepstin.ca>
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core and kobject fixes from Greg KH:
"Here are some minor fixes for the driver core and kobjects that people
have reported recently.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
* tag 'driver-core-3.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
kobject: provide more diagnostic info for kobject_add_internal() failures
sysfs: handle 'parent deleted before child added'
sysfs: Prevent crash on unset sysfs group attributes
sysfs: Update the name hash for an entry after changing the namespace
drivers/base: fix compiler warning in SoC export driver - idr should be ida
drivers/base: Remove unneeded spin_lock_init call for soc_lock
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