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Once we'd freed m->buf, m->count should become zero - we have no valid
contents reachable via m->buf.
Reported-by: Charley (Hao Chuan) Chu <charley.chu@broadcom.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull CIFS fixes from Steve French:
"A set of cifs fixes most important of which is Pavel's fix for some
problems with handling Windows reparse points and also the security
fix for setfacl over a cifs mount to Samba removing part of the ACL.
Both of these fixes are for stable as well.
Also added most of copychunk (copy offload) support to cifs although I
expect a final patch in that series (to fix handling of larger files)
in a few days (had to hold off on that in order to incorporate some
additional code review feedback).
Also added support for O_DIRECT on forcedirectio mounts (needed in
order to run some of the server benchmarks over cifs and smb2/smb3
mounts)"
* 'for-linus' of git://git.samba.org/sfrench/cifs-2.6:
[CIFS] Warn if SMB3 encryption required by server
setfacl removes part of ACL when setting POSIX ACLs to Samba
[CIFS] Set copychunk defaults
CIFS: SMB2/SMB3 Copy offload support (refcopy) phase 1
cifs: Use data structures to compute NTLMv2 response offsets
[CIFS] O_DIRECT opens should work on directio mounts
cifs: don't spam the logs on unexpected lookup errors
cifs: change ERRnomem error mapping from ENOMEM to EREMOTEIO
CIFS: Fix symbolic links usage
- Stable fix for data corruption when retransmitting O_DIRECT writes
- Stable fix for a deep recursion/stack overflow bug in rpc_release_client
- Stable fix for infinite looping when mounting a NFSv4.x volume
- Fix a typo in the nfs mount option parser
- Allow pNFS layouts to be compiled into the kernel when NFSv4.1 is
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Merge tag 'nfs-for-3.13-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfixes:
- Stable fix for data corruption when retransmitting O_DIRECT writes
- Stable fix for a deep recursion/stack overflow bug in rpc_release_client
- Stable fix for infinite looping when mounting a NFSv4.x volume
- Fix a typo in the nfs mount option parser
- Allow pNFS layouts to be compiled into the kernel when NFSv4.1 is
* tag 'nfs-for-3.13-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
nfs: fix pnfs Kconfig defaults
NFS: correctly report misuse of "migration" mount option.
nfs: don't retry detect_trunking with RPC_AUTH_UNIX more than once
SUNRPC: Avoid deep recursion in rpc_release_client
SUNRPC: Fix a data corruption issue when retransmitting RPC calls
Pull nfsd changes from Bruce Fields:
"This includes miscellaneous bugfixes and cleanup and a performance fix
for write-heavy NFSv4 workloads.
(The most significant nfsd-relevant change this time is actually in
the delegation patches that went through Viro, fixing a long-standing
bug that can cause NFSv4 clients to miss updates made by non-nfs users
of the filesystem. Those enable some followup nfsd patches which I
have queued locally, but those can wait till 3.14)"
* 'nfsd-next' of git://linux-nfs.org/~bfields/linux: (24 commits)
nfsd: export proper maximum file size to the client
nfsd4: improve write performance with better sendspace reservations
svcrpc: remove an unnecessary assignment
sunrpc: comment typo fix
Revert "nfsd: remove_stid can be incorporated into nfs4_put_delegation"
nfsd4: fix discarded security labels on setattr
NFSD: Add support for NFS v4.2 operation checking
nfsd4: nfsd_shutdown_net needs state lock
NFSD: Combine decode operations for v4 and v4.1
nfsd: -EINVAL on invalid anonuid/gid instead of silent failure
nfsd: return better errors to exportfs
nfsd: fh_update should error out in unexpected cases
nfsd4: need to destroy revoked delegations in destroy_client
nfsd: no need to unhash_stid before free
nfsd: remove_stid can be incorporated into nfs4_put_delegation
nfsd: nfs4_open_delegation needs to remove_stid rather than unhash_stid
nfsd: nfs4_free_stid
nfsd: fix Kconfig syntax
sunrpc: trim off EC bytes in GSSAPI v2 unwrap
gss_krb5: document that we ignore sequence number
...
Pull btrfs fixes from Chris Mason:
"This pull fixes the empty_zero_page bug that Heiko reported, and
includes one more cleanup from Al Viro"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: get rid of fdentry()
btrfs: fix empty_zero_page misusage
setfacl over cifs mounts can remove the default ACL when setting the
(non-default part of) the ACL and vice versa (we were leaving at 0
rather than setting to -1 the count field for the unaffected
half of the ACL. For example notice the setfacl removed
the default ACL in this sequence:
steven@steven-GA-970A-DS3:~/cifs-2.6$ getfacl /mnt/test-dir ; setfacl
-m default:user:test:rwx,user:test:rwx /mnt/test-dir
getfacl: Removing leading '/' from absolute path names
user::rwx
group::r-x
other::r-x
default:user::rwx
default:user:test:rwx
default:group::r-x
default😷:rwx
default:other::r-x
steven@steven-GA-970A-DS3:~/cifs-2.6$ getfacl /mnt/test-dir
getfacl: Removing leading '/' from absolute path names
user::rwx
user:test:rwx
group::r-x
mask::rwx
other::r-x
CC: Stable <stable@kernel.org>
Signed-off-by: Steve French <smfrench@gmail.com>
Acked-by: Jeremy Allison <jra@samba.org>
Pull trivial tree updates from Jiri Kosina:
"Usual earth-shaking, news-breaking, rocket science pile from
trivial.git"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (23 commits)
doc: usb: Fix typo in Documentation/usb/gadget_configs.txt
doc: add missing files to timers/00-INDEX
timekeeping: Fix some trivial typos in comments
mm: Fix some trivial typos in comments
irq: Fix some trivial typos in comments
NUMA: fix typos in Kconfig help text
mm: update 00-INDEX
doc: Documentation/DMA-attributes.txt fix typo
DRM: comment: `halve' -> `half'
Docs: Kconfig: `devlopers' -> `developers'
doc: typo on word accounting in kprobes.c in mutliple architectures
treewide: fix "usefull" typo
treewide: fix "distingush" typo
mm/Kconfig: Grammar s/an/a/
kexec: Typo s/the/then/
Documentation/kvm: Update cpuid documentation for steal time and pv eoi
treewide: Fix common typo in "identify"
__page_to_pfn: Fix typo in comment
Correct some typos for word frequency
clk: fixed-factor: Fix a trivial typo
...
Patch 2 of the copy chunk series (the final patch will
use these to handle copies of files larger than the chunk size.
We set the same defaults that Windows and Samba expect for
CopyChunk.
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Defaulting to m seem to prevent building the pnfs layout modules into the
kernel. Default to the value of CONFIG_NFS_V4 make sure they are
built in for built-in NFSv4 support and modular for a modular NFSv4.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
The current test on valid use of the "migration" mount option can never
report an error as it will only do so if
mnt->version !=4 && mnt->minor_version != 0
(and some other condition), but if that test would succeed, then the previous
test has already gone-to out_minorversion_mismatch.
So change the && to an || to get correct semantics.
Signed-off-by: NeilBrown <neilb@suse.de>
Acked-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Heiko Carstens noticed that btrfs was using empty_zero_page
incorrectly. He explained:
The definition of empty_zero_page is architecture specific. It
is (currently) either a character array, an unsigned long
containing the address of the empty_zero_page, or even worse
only the address of the struct page belonging to the
empty_zero_page.
This commit changes btrfs to use a for-loop instead. On x86
the resulting .ko is smaller, and we're no longer worrying about
how each arch builds its zeros.
Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Merge patches from Andrew Morton:
- memstick fixes
- the rest of MM
- various misc bits that were awaiting merges from linux-next into
mainline: seq_file, printk, rtc, completions, w1, softirqs, llist,
kfifo, hfsplus
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (72 commits)
cmdline-parser: fix build
hfsplus: Fix undefined __divdi3 in hfsplus_init_header_node()
kfifo API type safety
kfifo: kfifo_copy_{to,from}_user: fix copied bytes calculation
sound/core/memalloc.c: use gen_pool_dma_alloc() to allocate iram buffer
llists-move-llist_reverse_order-from-raid5-to-llistc-fix
llists: move llist_reverse_order from raid5 to llist.c
kernel: fix generic_exec_single indentation
kernel-provide-a-__smp_call_function_single-stub-for-config_smp-fix
kernel: provide a __smp_call_function_single stub for !CONFIG_SMP
kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS
revert "softirq: Add support for triggering softirq work on softirqs"
drivers/w1/masters/w1-gpio.c: use dev_get_platdata()
sched: remove INIT_COMPLETION
tree-wide: use reinit_completion instead of INIT_COMPLETION
sched: replace INIT_COMPLETION with reinit_completion
drivers/rtc/rtc-hid-sensor-time.c: enable HID input processing early
drivers/rtc/rtc-hid-sensor-time.c: use dev_get_platdata()
vsprintf: ignore %n again
seq_file: remove "%n" usage from seq_file users
...
ERROR: "__divdi3" [fs/hfsplus/hfsplus.ko] undefined!
Introduced by commit 099e9245e0 ("hfsplus: implement attributes file's
header node initialization code").
i_size_read() returns loff_t, which is long long, i.e. 64-bit. node_size
is size_t, which is either 32-bit or 64-bit. Hence
"i_size_read(attr_file) / node_size" is a 64-by-32 or 64-by-64 division,
causing (some versions of) gcc to emit a call to __divdi3().
Fortunately node_size is actually 16-bit, as the sole caller of
hfsplus_init_header_node() passes a u16. Hence change its type from
size_t to u16, and use do_div() to perform a 64-by-32 division.
Not seen in m68k/allmodconfig in -next, so it really depends on the
verion of gcc.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Vyacheslav Dubeyko <slava@dubeyko.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Use this new function to make code more comprehensible, since we are
reinitialzing the completion, not initializing.
[akpm@linux-foundation.org: linux-next resyncs]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org> (personally at LCE13)
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
All seq_printf() users are using "%n" for calculating padding size,
convert them to use seq_setwidth() / seq_pad() pair.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Joe Perches <joe@perches.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There are several users who want to know bytes written by seq_*() for
alignment purpose. Currently they are using %n format for knowing it
because seq_*() returns 0 on success.
This patch introduces seq_setwidth() and seq_pad() for allowing them to
align without using %n format.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Joe Perches <joe@perches.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
With split ptlock it's important to know which lock
pmd_trans_huge_lock() took. This patch adds one more parameter to the
function to return the lock.
In most places migration to new api is trivial. Exception is
move_huge_pmd(): we need to take two locks if pmd tables are different.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Alex Thorlton <athorlton@sgi.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull btrfs update frm Chris Mason:
"This is our usual merge window set of bug fixes, performance
improvements and cleanups. Miao Xie has some really nice
optimizations for writeback.
Josef also expanded our sanity checks quite a bit; these make up a big
chunk of the new lines"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (98 commits)
Btrfs: rename btrfs_start_all_delalloc_inodes
Btrfs: don't wait for the completion of all the ordered extents
Btrfs: don't wait for all the async delalloc when shrinking delalloc
Btrfs: fix the confusion between delalloc bytes and metadata bytes
Btrfs: pick up the code for the item number calculation in flush_space()
Btrfs: wait for the ordered extent only when we want
Btrfs: remove unnecessary initialization and memory barrior in shrink_delalloc()
Btrfs: avoid unnecessary scrub workers allocation
Btrfs: check file extent type before anything else
btrfs: Remove useless variable in write_ctree_super()
btrfs: Fix checkpatch.pl warning of spacing issues
btrfs: Replace kmalloc with kmalloc_array
btrfs: Enclose macros with complex values within parenthesis
btrfs: Use WARN_ON()'s return value in place of WARN_ON(1)
btrfs: Remove redundant local zero structure
btrfs: Pack struct btrfs_device
btrfs: Replace multiple atomic_inc() with atomic_add()
btrfs: Add helper function for free_root_pointers()
Btrfs: fix a crash when running balance and defrag concurrently
Btrfs: do not run snapshot-aware defragment on error
...
I noticed that we export a way to high value for the maxfilesize
attribute when debugging a client issue. The issue didn't turn
out to be related to it, but I think we should export it, so that
clients can limit what write sizes they accept before hitting
the server.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 changes from Ted Ts'o:
"Ext4 updates for 3.13. Mostly bug fixes and cleanups"
* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: add prototypes for macro-generated functions
ext4: return non-zero st_blocks for inline data
ext4: use prandom_u32() instead of get_random_bytes()
ext4: remove unreachable code after ext4_can_extents_be_merged()
ext4: remove unreachable code in ext4_can_extents_be_merged()
ext4: avoid bh leak in retry path of ext4_expand_extra_isize_ea()
ext4: don't count free clusters from a corrupt block group
ext4: fix FITRIM in no journal mode
ext4: drop set but otherwise unused variable from ext4_add_dirent_to_inline()
ext4: change ext4_read_inline_dir() to return 0 on success
ext4: pair trace_ext4_writepages & trace_ext4_writepages_result
ext4: add ratelimiting to ext4 messages
ext4: fix performance regression in ext4_writepages
ext4: fixup kerndoc annotation of mpage_map_and_submit_extent()
ext4: fix assertion in ext4_add_complete_io()
For 3.13-rc1 we have an eclectic assortment of bugfixes, cleanups, and
refactoring. Bugfixes that stand out are the fix for the AGF/AGI
deadlock, incore extent list fixes, verifier fixes for v4 superblocks
and growfs, and memory leaks. There are some asserts, warnings, and
strings that were cleaned up. There was further rearrangement of code
to make libxfs and the kernel sync up more easily, differences between
v2 and v3 directory code were abstracted using an ops vector,
xfs_inactive was reworked, and the preallocation/hole punching code was
refactored.
- simplify kmem_zone_zalloc
- add traces for AGF/AGI read ops
- add additional AIL traces
- fix xfs_remove AGF vs AGI deadlock
- fix the extent count of new incore extent page in the indirection array
- don't fail bad secondary superblocks verification on v4 filesystems
due to unzeroed bits after v4 fields
- fix possible NULL dereference in xlog_verify_iclog
- remove redundant assert in xfs_dir2_leafn_split
- prevent stack overflows from page cache allocation
- fix some sparse warnings
- fix directory block format verifier to check the leaf entry count
- abstract the differences in dir2/dir3 via an ops vector
- continue process of reorganization to make libxfs/kernel code merges easier
- refactor the preallocation and hole punching code
- fix for growfs and verifiers
- remove unnecessary scary corruption error when probing non-xfs filesystems
- remove extra newlines from strings passed to printk
- prevent deadlock trying to cover an active log
- rework xfs_inactive()
- add the inode directory type support to XFS_IOC_FSGEOM
- cleanup (remove) usage of is_bad_inode
- fix miscalculation in xfs_iext_realloc_direct which results in oversized
direct extent list
- remove unnecessary count arg to xfs_iomap_write_allocate
- fix memory leak in xlog_recover_add_to_trans
- check superblock instead of block magic to determine if dtype field
is present
- fix lockdep annotation due to project quotas
- fix regression in xfs_node_toosmall which can lead to incorrect directory
btree node collapse
- make log recovery verify filesystem uuid of recovering blocks
- fix XFS_IOC_FREE_EOFBLOCKS definition
- remove invalid assert in xfs_inode_free
- fix for AIL lock regression
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Merge tag 'xfs-for-linus-v3.13-rc1' of git://oss.sgi.com/xfs/xfs
Pull xfs update from Ben Myers:
"For 3.13-rc1 we have an eclectic assortment of bugfixes, cleanups, and
refactoring. Bugfixes that stand out are the fix for the AGF/AGI
deadlock, incore extent list fixes, verifier fixes for v4 superblocks
and growfs, and memory leaks. There are some asserts, warnings, and
strings that were cleaned up. There was further rearrangement of code
to make libxfs and the kernel sync up more easily, differences between
v2 and v3 directory code were abstracted using an ops vector,
xfs_inactive was reworked, and the preallocation/hole punching code
was refactored.
- simplify kmem_zone_zalloc
- add traces for AGF/AGI read ops
- add additional AIL traces
- fix xfs_remove AGF vs AGI deadlock
- fix the extent count of new incore extent page in the indirection
array
- don't fail bad secondary superblocks verification on v4 filesystems
due to unzeroed bits after v4 fields
- fix possible NULL dereference in xlog_verify_iclog
- remove redundant assert in xfs_dir2_leafn_split
- prevent stack overflows from page cache allocation
- fix some sparse warnings
- fix directory block format verifier to check the leaf entry count
- abstract the differences in dir2/dir3 via an ops vector
- continue process of reorganization to make libxfs/kernel code
merges easier
- refactor the preallocation and hole punching code
- fix for growfs and verifiers
- remove unnecessary scary corruption error when probing non-xfs
filesystems
- remove extra newlines from strings passed to printk
- prevent deadlock trying to cover an active log
- rework xfs_inactive()
- add the inode directory type support to XFS_IOC_FSGEOM
- cleanup (remove) usage of is_bad_inode
- fix miscalculation in xfs_iext_realloc_direct which results in
oversized direct extent list
- remove unnecessary count arg to xfs_iomap_write_allocate
- fix memory leak in xlog_recover_add_to_trans
- check superblock instead of block magic to determine if dtype field
is present
- fix lockdep annotation due to project quotas
- fix regression in xfs_node_toosmall which can lead to incorrect
directory btree node collapse
- make log recovery verify filesystem uuid of recovering blocks
- fix XFS_IOC_FREE_EOFBLOCKS definition
- remove invalid assert in xfs_inode_free
- fix for AIL lock regression"
* tag 'xfs-for-linus-v3.13-rc1' of git://oss.sgi.com/xfs/xfs: (49 commits)
xfs: simplify kmem_{zone_}zalloc
xfs: add tracepoints to AGF/AGI read operations
xfs: trace AIL manipulations
xfs: xfs_remove deadlocks due to inverted AGF vs AGI lock ordering
xfs: fix the extent count when allocating an new indirection array entry
xfs: be more forgiving of a v4 secondary sb w/ junk in v5 fields
xfs: fix possible NULL dereference in xlog_verify_iclog
xfs:xfs_dir2_node.c: pointer use before check for null
xfs: prevent stack overflows from page cache allocation
xfs: fix static and extern sparse warnings
xfs: validity check the directory block leaf entry count
xfs: make dir2 ftype offset pointers explicit
xfs: convert directory vector functions to constants
xfs: convert directory vector functions to constants
xfs: vectorise encoding/decoding directory headers
xfs: vectorise DA btree operations
xfs: vectorise directory leaf operations
xfs: vectorise directory data operations part 2
xfs: vectorise directory data operations
xfs: vectorise remaining shortform dir2 ops
...
Pull core locking changes from Ingo Molnar:
"The biggest changes:
- add lockdep support for seqcount/seqlocks structures, this
unearthed both bugs and required extra annotation.
- move the various kernel locking primitives to the new
kernel/locking/ directory"
* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
block: Use u64_stats_init() to initialize seqcounts
locking/lockdep: Mark __lockdep_count_forward_deps() as static
lockdep/proc: Fix lock-time avg computation
locking/doc: Update references to kernel/mutex.c
ipv6: Fix possible ipv6 seqlock deadlock
cpuset: Fix potential deadlock w/ set_mems_allowed
seqcount: Add lockdep functionality to seqcount/seqlock structures
net: Explicitly initialize u64_stats_sync structures for lockdep
locking: Move the percpu-rwsem code to kernel/locking/
locking: Move the lglocks code to kernel/locking/
locking: Move the rwsem code to kernel/locking/
locking: Move the rtmutex code to kernel/locking/
locking: Move the semaphore core to kernel/locking/
locking: Move the spinlock code to kernel/locking/
locking: Move the lockdep code to kernel/locking/
locking: Move the mutex code to kernel/locking/
hung_task debugging: Add tracepoint to report the hang
x86/locking/kconfig: Update paravirt spinlock Kconfig description
lockstat: Report avg wait and hold times
lockdep, x86/alternatives: Drop ancient lockdep fixup message
...
This first patch adds the ability for us to do a server side copy
(ie fast copy offloaded to the server to perform, aka refcopy)
"cp --reflink"
of one file to another located on the same server. This
is much faster than traditional copy (which requires
reading and writing over the network and extra
memcpys).
This first version is not going to be copy
files larger than about 1MB (to Samba) until I add
support for multiple chunks and for autoconfiguring
the chunksize.
It includes:
1) processing of the ioctl
2) marshalling and sending the SMB2/SMB3 fsctl over the network
3) simple parsing of the response
It does not include yet (these will be in followon patches to come soon):
1) support for multiple chunks
2) support for autoconfiguring and remembering the chunksize
3) Support for the older style copychunk which Samba 4.1 server supports
(because this requires write permission on the target file, which
cp does not give you, apparently per-posix). This may require
a distinct tool (other than cp) and other ioctl to implement.
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
* Unify some compile-time differences so that we have fewer uses of
#ifdef CONFIG_OF in atmel_nand
* Other general cleanups (removing unused functions, options, variables,
fields; use correct interfaces)
* Fix BUG() for new odd-sized NAND, which report non-power-of-2 dimensions via
ONFI
* Miscellaneous driver fixes (SPI NOR flash; BCM47xx NAND flash; etc.)
* Improve differentiation between SLC and MLC NAND -- this clarifies an ABI
issue regarding the MTD "type" (in sysfs and in ioctl(MEMGETINFO)), where
the MTD_MLCNANDFLASH type was present but inconsistently used
* Extend GPMI NAND to support multi-chip-select NAND for some platforms
* Many improvements to the OMAP2/3 NAND driver, including an expanded DT
binding to bring us closer to mainline support for some OMAP systems
* Fix a deadlock in the error path of the Atmel NAND driver probe
* Correct the error codes from MTD mmap() to conform to POSIX and the Linux
Programmer's Manual. This is an acknowledged change in the MTD ABI, but I
can't imagine somebody relying on the non-standard -ENOSYS error code
specifically. Am I just being unimaginative? :)
* Fix a few important GPMI NAND bugs (one regression from 3.12 and one
long-standing race condition)
* More? Read the log!
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Merge tag 'for-linus-20131112' of git://git.infradead.org/linux-mtd
Pull MTD changes from Brian Norris:
- Unify some compile-time differences so that we have fewer uses of
#ifdef CONFIG_OF in atmel_nand
- Other general cleanups (removing unused functions, options,
variables, fields; use correct interfaces)
- Fix BUG() for new odd-sized NAND, which report non-power-of-2
dimensions via ONFI
- Miscellaneous driver fixes (SPI NOR flash; BCM47xx NAND flash; etc.)
- Improve differentiation between SLC and MLC NAND -- this clarifies an
ABI issue regarding the MTD "type" (in sysfs and in the MEMGETINFO
ioctl), where the MTD_MLCNANDFLASH type was present but
inconsistently used
- Extend GPMI NAND to support multi-chip-select NAND for some platforms
- Many improvements to the OMAP2/3 NAND driver, including an expanded
DT binding to bring us closer to mainline support for some OMAP
systems
- Fix a deadlock in the error path of the Atmel NAND driver probe
- Correct the error codes from MTD mmap() to conform to POSIX and the
Linux Programmer's Manual. This is an acknowledged change in the MTD
ABI, but I can't imagine somebody relying on the non-standard -ENOSYS
error code specifically. Am I just being unimaginative? :)
- Fix a few important GPMI NAND bugs (one regression from 3.12 and one
long-standing race condition)
- More? Read the log!
* tag 'for-linus-20131112' of git://git.infradead.org/linux-mtd: (98 commits)
mtd: gpmi: fix the NULL pointer
mtd: gpmi: fix kernel BUG due to racing DMA operations
mtd: mtdchar: return expected errors on mmap() call
mtd: gpmi: only scan two chips for imx6
mtd: gpmi: Use devm_kzalloc()
mtd: atmel_nand: fix bug driver will in a dead lock if no nand detected
mtd: nand: use a local variable to simplify the nand_scan_tail
mtd: nand: remove deprecated IRQF_DISABLED
mtd: dataflash: Say if we find a device we don't support
mtd: nand: omap: fix error return code in omap_nand_probe()
mtd: nand_bbt: kill NAND_BBT_SCANALLPAGES
mtd: m25p80: fixup device removal failure path
mtd: mxc_nand: Include linux/of.h header
mtd: remove duplicated include from mtdcore.c
mtd: m25p80: add support for Macronix mx25l3255e
mtd: nand: omap: remove selection of BCH ecc-scheme via KConfig
mtd: nand: omap: updated devm_xx for all resource allocation and free calls
mtd: nand: omap: use drivers/mtd/nand/nand_bch.c wrapper for BCH ECC instead of lib/bch.c
mtd: nand: omap: clean-up ecc layout for BCH ecc schemes
mtd: nand: omap2: clean-up BCHx_HW and BCHx_SW ECC configurations in device_probe
...
Pull block IO core updates from Jens Axboe:
"This is the pull request for the core changes in the block layer for
3.13. It contains:
- The new blk-mq request interface.
This is a new and more scalable queueing model that marries the
best part of the request based interface we currently have (which
is fully featured, but scales poorly) and the bio based "interface"
which the new drivers for high IOPS devices end up using because
it's much faster than the request based one.
The bio interface has no block layer support, since it taps into
the stack much earlier. This means that drivers end up having to
implement a lot of functionality on their own, like tagging,
timeout handling, requeue, etc. The blk-mq interface provides all
these. Some drivers even provide a switch to select bio or rq and
has code to handle both, since things like merging only works in
the rq model and hence is faster for some workloads. This is a
huge mess. Conversion of these drivers nets us a substantial code
reduction. Initial results on converting SCSI to this model even
shows an 8x improvement on single queue devices. So while the
model was intended to work on the newer multiqueue devices, it has
substantial improvements for "classic" hardware as well. This code
has gone through extensive testing and development, it's now ready
to go. A pull request is coming to convert virtio-blk to this
model will be will be coming as well, with more drivers scheduled
for 3.14 conversion.
- Two blktrace fixes from Jan and Chen Gang.
- A plug merge fix from Alireza Haghdoost.
- Conversion of __get_cpu_var() from Christoph Lameter.
- Fix for sector_div() with 64-bit divider from Geert Uytterhoeven.
- A fix for a race between request completion and the timeout
handling from Jeff Moyer. This is what caused the merge conflict
with blk-mq/core, in case you are looking at that.
- A dm stacking fix from Mike Snitzer.
- A code consolidation fix and duplicated code removal from Kent
Overstreet.
- A handful of block bug fixes from Mikulas Patocka, fixing a loop
crash and memory corruption on blk cg.
- Elevator switch bug fix from Tomoki Sekiyama.
A heads-up that I had to rebase this branch. Initially the immutable
bio_vecs had been queued up for inclusion, but a week later, it became
clear that it wasn't fully cooked yet. So the decision was made to
pull this out and postpone it until 3.14. It was a straight forward
rebase, just pruning out the immutable series and the later fixes of
problems with it. The rest of the patches applied directly and no
further changes were made"
* 'for-3.13/core' of git://git.kernel.dk/linux-block: (31 commits)
block: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
block: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
block: Do not call sector_div() with a 64-bit divisor
kernel: trace: blktrace: remove redundent memcpy() in compat_blk_trace_setup()
block: Consolidate duplicated bio_trim() implementations
block: Use rw_copy_check_uvector()
block: Enable sysfs nomerge control for I/O requests in the plug list
block: properly stack underlying max_segment_size to DM device
elevator: acquire q->sysfs_lock in elevator_change()
elevator: Fix a race in elevator switching and md device initialization
block: Replace __get_cpu_var uses
bdi: test bdi_init failure
block: fix a probe argument to blk_register_region
loop: fix crash if blk_alloc_queue fails
blk-core: Fix memory corruption if blkcg_init_queue fails
block: fix race between request completion and timeout handling
blktrace: Send BLK_TN_PROCESS events to all running traces
blk-mq: don't disallow request merges for req->special being set
blk-mq: mq plug list breakage
blk-mq: fix for flush deadlock
...
Currently, when we try to mount and get back NFS4ERR_CLID_IN_USE or
NFS4ERR_WRONGSEC, we create a new rpc_clnt and then try the call again.
There is no guarantee that doing so will work however, so we can end up
retrying the call in an infinite loop.
Worse yet, we create the new client using rpc_clone_client_set_auth,
which creates the new client as a child of the old one. Thus, we can end
up with a *very* long lineage of rpc_clnts. When we go to put all of the
references to them, we can end up with a long call chain that can smash
the stack as each rpc_free_client() call can recurse back into itself.
This patch fixes this by simply ensuring that the SETCLIENTID call will
only be retried in this situation if the last attempt did not use
RPC_AUTH_UNIX.
Note too that with this change, we don't need the (i > 2) check in the
-EACCES case since we now have a more reliable test as to whether we
should reattempt.
Cc: stable@vger.kernel.org # v3.10+
Cc: Chuck Lever <chuck.lever@oracle.com>
Tested-by/Acked-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Currently the rpc code conservatively refuses to accept rpc's from a
client if the sum of its worst-case estimates of the replies it owes
that client exceed the send buffer space.
Unfortunately our estimate of the worst-case reply for an NFSv4 compound
is always the maximum read size. This can unnecessarily limit the
number of operations we handle concurrently, for example in the case
most operations are writes (which have small replies).
We can do a little better if we check which ops the compound contains.
This is still a rough estimate, we'll need to improve on it some day.
Reported-by: Shyam Kaushik <shyamnfs1@gmail.com>
Tested-by: Shyam Kaushik <shyamnfs1@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
We should unlock here before returning.
Fixes: df4e8d2c1d ('locks: implement delegations')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
alloc_anon_inode() returns an ERR_PTR(), it doesn't return NULL.
Fixes: 71ad7490c1 ('rework aio migrate pages to use aio fs')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Merge first patch-bomb from Andrew Morton:
"Quite a lot of other stuff is banked up awaiting further
next->mainline merging, but this batch contains:
- Lots of random misc patches
- OCFS2
- Most of MM
- backlight updates
- lib/ updates
- printk updates
- checkpatch updates
- epoll tweaking
- rtc updates
- hfs
- hfsplus
- documentation
- procfs
- update gcov to gcc-4.7 format
- IPC"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (269 commits)
ipc, msg: fix message length check for negative values
ipc/util.c: remove unnecessary work pending test
devpts: plug the memory leak in kill_sb
./Makefile: export initial ramdisk compression config option
init/Kconfig: add option to disable kernel compression
drivers: w1: make w1_slave::flags long to avoid memory corruption
drivers/w1/masters/ds1wm.cuse dev_get_platdata()
drivers/memstick/core/ms_block.c: fix unreachable state in h_msb_read_page()
drivers/memstick/core/mspro_block.c: fix attributes array allocation
drivers/pps/clients/pps-gpio.c: remove redundant of_match_ptr
kernel/panic.c: reduce 1 byte usage for print tainted buffer
gcov: reuse kbasename helper
kernel/gcov/fs.c: use pr_warn()
kernel/module.c: use pr_foo()
gcov: compile specific gcov implementation based on gcc version
gcov: add support for gcc 4.7 gcov format
gcov: move gcov structs definitions to a gcc version specific file
kernel/taskstats.c: return -ENOMEM when alloc memory fails in add_del_listener()
kernel/taskstats.c: add nla_nest_cancel() for failure processing between nla_nest_start() and nla_nest_end()
kernel/sysctl_binary.c: use scnprintf() instead of snprintf()
...
Pull vfs updates from Al Viro:
"All kinds of stuff this time around; some more notable parts:
- RCU'd vfsmounts handling
- new primitives for coredump handling
- files_lock is gone
- Bruce's delegations handling series
- exportfs fixes
plus misc stuff all over the place"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (101 commits)
ecryptfs: ->f_op is never NULL
locks: break delegations on any attribute modification
locks: break delegations on link
locks: break delegations on rename
locks: helper functions for delegation breaking
locks: break delegations on unlink
namei: minor vfs_unlink cleanup
locks: implement delegations
locks: introduce new FL_DELEG lock flag
vfs: take i_mutex on renamed file
vfs: rename I_MUTEX_QUOTA now that it's not used for quotas
vfs: don't use PARENT/CHILD lock classes for non-directories
vfs: pull ext4's double-i_mutex-locking into common code
exportfs: fix quadratic behavior in filehandle lookup
exportfs: better variable name
exportfs: move most of reconnect_path to helper function
exportfs: eliminate unused "noprogress" counter
exportfs: stop retrying once we race with rename/remove
exportfs: clear DISCONNECTED on all parents sooner
exportfs: more detailed comment for path_reconnect
...
This set includes a single fix to resolve to a race that could cause
lockspace shutdown to incorrectly return -EBUSY.
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Merge tag 'dlm-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm
Pull dlm fix from David Teigland:
"This set includes a single fix to resolve to a race that could cause
lockspace shutdown to incorrectly return -EBUSY"
* tag 'dlm-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
dlm: Avoid that dlm_release_lockspace() incorrectly returns -EBUSY
change which fixes a return error code.
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Merge tag 'upstream-3.13-rc1' of git://git.infradead.org/linux-ubifs
Pull ubifs changes from Artem Bityutskiy:
"Mostly fixes for the power cut emulation UBIFS mode, and only one
functional change which fixes a return error code"
* tag 'upstream-3.13-rc1' of git://git.infradead.org/linux-ubifs:
UBIFS: correct data corruption range
UBIFS: fix return code
UBIFS: remove unnecessary code in ubifs_garbage_collect
Pull fuse updates from Miklos Szeredi:
"This adds a ->writepage() implementation to fuse, improving mmaped
writeout and paving the way for buffered writeback.
And there's a patch to add a fix minor number for /dev/cuse, similarly
to /dev/fuse"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: writepages: protect secondary requests from fuse file release
fuse: writepages: update bdi writeout when deleting secondary request
fuse: writepages: crop secondary requests
fuse: writepages: roll back changes if request not found
cuse: add fix minor number to /dev/cuse
fuse: writepage: skip already in flight
fuse: writepages: handle same page rewrites
fuse: writepages: fix aggregation
fuse: fix race in fuse_writepages()
fuse: Implement writepages callback
fuse: don't BUG on no write file
fuse: lock page in mkwrite
fuse: Prepare to handle multiple pages in writeback
fuse: Getting file for writeback helper
Pull ext[23], udf and quota fixes from Jan Kara:
"Assorted fixes in quota, ext2, ext3 & udf.
Probably the most important is a fix of fs corruption issue in ext2
XIP support (OTOH xip is rarely used)"
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
ext2: Fix fs corruption in ext2_get_xip_mem()
quota: info leak in quota_getquota()
jbd: Revert "jbd: remove dependency on __GFP_NOFAIL"
udf: fix for pathetic mount times in case of invalid file system
ext3: Count journal as bsddf overhead in ext3_statfs
This patch-set includes the following major enhancement patches.
o add a sysfs to control reclaiming free segments
o enhance the f2fs global lock procedures
o enhance the victim selection flow
o wait for selected node blocks during fsync
o add some tracepoints
o add a config to remove abundant BUG_ONs
The other bug fixes are as follows.
o fix deadlock on acl operations
o fix some bugs with respect to orphan inodes
And, there are a bunch of cleanups.
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Merge tag 'for-f2fs-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
Pull f2fs updates from Jaegeuk Kim:
"This patch-set includes the following major enhancement patches.
- add a sysfs to control reclaiming free segments
- enhance the f2fs global lock procedures
- enhance the victim selection flow
- wait for selected node blocks during fsync
- add some tracepoints
- add a config to remove abundant BUG_ONs
The other bug fixes are as follows.
- fix deadlock on acl operations
- fix some bugs with respect to orphan inodes
And, there are a bunch of cleanups"
* tag 'for-f2fs-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (42 commits)
f2fs: issue more large discard command
f2fs: fix memory leak after kobject init failed in fill_super
f2fs: cleanup waiting routine for writeback pages in cp
f2fs: avoid to use a NULL point in destroy_segment_manager
f2fs: remove unnecessary TestClearPageError when wait pages writeback
f2fs: update f2fs document
f2fs: avoid to wait all the node blocks during fsync
f2fs: check all ones or zeros bitmap with bitops for better mount performance
f2fs: change the method of calculating the number summary blocks
f2fs: fix calculating incorrect free size when update xattr in __f2fs_setxattr
f2fs: add an option to avoid unnecessary BUG_ONs
f2fs: introduce CONFIG_F2FS_CHECK_FS for BUG_ON control
f2fs: fix a deadlock during init_acl procedure
f2fs: clean up acl flow for better readability
f2fs: remove unnecessary segment bitmap updates
f2fs: add tracepoint for vm_page_mkwrite
f2fs: add tracepoint for set_page_dirty
f2fs: remove redundant set_page_dirty from write_compacted_summaries
f2fs: add reclaiming control by sysfs
f2fs: introduce f2fs_balance_fs_bg for some background jobs
...
When devpts is unmounted, there may be a no-longer-used IDR tree hanging
off the superblock we are about to kill. This needs to be cleaned up
before destroying the SB.
The leak is usually not a big deal because unmounting devpts is typically
done when shutting down the whole machine. However, shutting down an LXC
container instead of a physical machine exposes the problem (the garbage
is detectable with kmemleak).
Signed-off-by: Ilija Hadzic <ihadzic@research.bell-labs.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The get_dumpable() return value is not boolean. Most users of the
function actually want to be testing for non-SUID_DUMP_USER(1) rather than
SUID_DUMP_DISABLE(0). The SUID_DUMP_ROOT(2) is also considered a
protected state. Almost all places did this correctly, excepting the two
places fixed in this patch.
Wrong logic:
if (dumpable == SUID_DUMP_DISABLE) { /* be protective */ }
or
if (dumpable == 0) { /* be protective */ }
or
if (!dumpable) { /* be protective */ }
Correct logic:
if (dumpable != SUID_DUMP_USER) { /* be protective */ }
or
if (dumpable != 1) { /* be protective */ }
Without this patch, if the system had set the sysctl fs/suid_dumpable=2, a
user was able to ptrace attach to processes that had dropped privileges to
that user. (This may have been partially mitigated if Yama was enabled.)
The macros have been moved into the file that declares get/set_dumpable(),
which means things like the ia64 code can see them too.
CVE-2013-2929
Reported-by: Vasily Kulikov <segoon@openwall.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Under Pseudo filesystems, /proc/kcore support has no help.
Fixes a portion of kernel bugzilla #52671:
https://bugzilla.kernel.org/show_bug.cgi?id=52671
Thanks for David Howells for the help text.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: <lailavrazda1979@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Clean up proc_reg_get_unmapped_area due to its 80-column limit
violation.
Signed-off-by: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Tested-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Implement functionality of creation AttributesFile metadata file on HFS+
volume in the case of absence of it.
It makes trying to open AttributesFile's B-tree during mount of HFS+
volume. If HFS+ volume hasn't AttributesFile then a pointer on
AttributesFile's B-tree keeps as NULL. Thereby, when it is discovered
absence of AttributesFile on HFS+ volume in the begin of xattr creation
operation then AttributesFile will be created.
The creation of AttributesFile will have success in the case of
availability (2 * clump) free blocks on HFS+ volume. Otherwise,
creation operation is ended with error (-ENOSPC).
Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@infradead.org>
Acked-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There are situation when HFS+ volume had been created without
AttributesFile. Such situation can take place because of using old
mkfs.hfs utility or creation HFS+ volume without taking in mind
necessity to use xattrs. For example, Mac OS X 10.4 (Tiger) doesn't
create AttributesFile during mkfs phase. Also it is a very frequent
situation for the case of users that created HFS+ volumes under Linux.
As a result, xattrs and POSIX ACLs on HFS+ volume are unavailable for
such users.
This patchset implements functionality of AttributesFile creation on
HFS+ volume in the case of this metadata file absence during operation
of xattr creation.
This patch:
Add functionality of metadata file's clump size calculation. Operation
of AttributesFile creation needs in clump size setting. This value will
be used when AttributesFile will be extended.
This code is adopted from code of newfs_hfs utility of diskdev_cmds packet
http://opensource.apple.com/tarballs/diskdev_cmds/.
Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Hin-Tak Leung <htl10@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
