Commit Graph

30099 Commits

Author SHA1 Message Date
Al Viro
3592ac4440 9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-26 02:46:07 -05:00
Al Viro
5fa6300ae0 9p: split dropping the acls from v9fs_set_create_acl()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-26 02:46:06 -05:00
Al Viro
be308f0796 9p: switch v9fs_acl_chmod() from dentry to inode+fid
caller has both, might as well pass them explicitly.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-26 02:46:06 -05:00
Al Viro
0f235caeae 9p: switch v9fs_set_acl() from dentry to fid
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-26 02:46:06 -05:00
Al Viro
7f165aaa7d 9p: lift the call of set_cached_acl() into the callers of v9fs_set_acl()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-26 02:46:05 -05:00
Al Viro
38baba9ea0 9p: add fid-based variant of v9fs_xattr_set()
... making v9fs_xattr_set() a wrapper for it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-26 02:46:05 -05:00
Al Viro
0df4d6e5bd hugetlb_file_setup(): use d_alloc_pseudo()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-26 02:45:52 -05:00
Al Viro
4e6b897328 hostfs: directory methods have no business in non-directory inode_operations
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:37 -05:00
Al Viro
740da42efa __d_materialise_unique() is too generic
Its first argument is always non-root, while the second one is
always root.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:36 -05:00
Jan Kara
54c807e71d fs: Fix possible use-after-free with AIO
Running AIO is pinning inode in memory using file reference. Once AIO
is completed using aio_complete(), file reference is put and inode can
be freed from memory. So we have to be sure that calling aio_complete()
is the last thing we do with the inode.

CC: Christoph Hellwig <hch@infradead.org>
CC: Jens Axboe <axboe@kernel.dk>
CC: Jeff Moyer <jmoyer@redhat.com>
CC: stable@vger.kernel.org
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:36 -05:00
Al Viro
da2d8455ed constify d_lookup() arguments
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:35 -05:00
Al Viro
a713ca2ab9 constify __d_lookup() arguments
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:35 -05:00
Al Viro
cc2a527115 lookup_slow: get rid of name argument
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:35 -05:00
Al Viro
e97cdc87be lookup_fast: get rid of name argument
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:34 -05:00
Al Viro
21b9b07392 get rid of name and type arguments of walk_component()
... always can be found in nameidata now.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:34 -05:00
Al Viro
5f4a6a6950 link_path_walk(): move assignments to nd->last/nd->last_type up
... and clean the main loop a bit

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:34 -05:00
Jeff Layton
ad8ca3743c vfs: remove d_path_with_unreachable
The last caller was removed >2 years ago in commit 7b2a69ba7.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:33 -05:00
Anatol Pomozov
39b6525274 fs: Preserve error code in get_empty_filp(), part 2
Allocating a file structure in function get_empty_filp() might fail because
of several reasons:
 - not enough memory for file structures
 - operation is not allowed
 - user is over its limit

Currently the function returns NULL in all cases and we loose the exact
reason of the error. All callers of get_empty_filp() assume that the function
can fail with ENFILE only.

Return error through pointer. Change all callers to preserve this error code.

[AV: cleaned up a bit, carved the get_empty_filp() part out into a separate commit
(things remaining here deal with alloc_file()), removed pipe(2) behaviour change]

Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com>
Reviewed-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:32 -05:00
Al Viro
1afc99beaf propagate error from get_empty_filp() to its callers
Based on parts from Anatol's patch (the rest is the next commit).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:32 -05:00
Al Viro
496ad9aa8e new helper: file_inode(file)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:31 -05:00
Al Viro
57eccb830f mount: consolidate permission checks
... and ask for global CAP_SYS_ADMIN only for superblock-level remounts

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:31 -05:00
Al Viro
9b40bc90ab get rid of unprotected dereferencing of mnt->mnt_ns
It's safe only under namespace_sem or vfsmount_lock; all places
in fs/namespace.c that want mnt->mnt_ns->user_ns actually want to use
current->nsproxy->mnt_ns->user_ns (note the calls of check_mnt() in
there).

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22 23:31:05 -05:00
Linus Torvalds
dfdebc2483 xfs: bugfixes for 3.8-rc4
- fix(es) for compound buffers
 - fix for dquot soft timer asserts due to overflow of d_blk_softlimit
 - fix for regression in dir v2 code introduced in commit 20f7e9f3
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Merge tag 'for-linus-v3.8-rc4' of git://oss.sgi.com/xfs/xfs

Pull xfs bugfixes from Ben Myers:

 - fix(es) for compound buffers

 - fix for dquot soft timer asserts due to overflow of d_blk_softlimit

 - fix for regression in dir v2 code introduced in commit 20f7e9f372
   ("xfs: factor dir2 block read operations")

* tag 'for-linus-v3.8-rc4' of git://oss.sgi.com/xfs/xfs:
  xfs: recalculate leaf entry pointer after compacting a dir2 block
  xfs: remove int casts from debug dquot soft limit timer asserts
  xfs: fix the multi-segment log buffer format
  xfs: fix segment in xfs_buf_item_format_segment
  xfs: rename bli_format to avoid confusion with bli_formats
  xfs: use b_maps[] for discontiguous buffers
2013-01-16 16:19:54 -08:00
Eric Sandeen
37f13561de xfs: recalculate leaf entry pointer after compacting a dir2 block
Dave Jones hit this assert when doing a compile on recent git, with
CONFIG_XFS_DEBUG enabled:

XFS: Assertion failed: (char *)dup - (char *)hdr == be16_to_cpu(*xfs_dir2_data_unused_tag_p(dup)), file: fs/xfs/xfs_dir2_data.c, line: 828

Upon further digging, the tag found by xfs_dir2_data_unused_tag_p(dup)
contained "2" and not the proper offset, and I found that this value was
changed after the memmoves under "Use a stale leaf for our new entry."
in xfs_dir2_block_addname(), i.e.

                        memmove(&blp[mid + 1], &blp[mid],
                                (highstale - mid) * sizeof(*blp));

overwrote it.

What has happened is that the previous call to xfs_dir2_block_compact()
has rearranged things; it changes btp->count as well as the
blp array.  So after we make that call, we must recalculate the
proper pointer to the leaf entries by making another call to
xfs_dir2_block_leaf_p().

Dave provided a metadump image which led to a simple reproducer
(create a particular filename in the affected directory) and this
resolves the testcase as well as the bug on his live system.

Thanks also to dchinner for looking at this one with me.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Tested-by: Dave Jones <davej@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
2013-01-16 16:08:55 -06:00
Brian Foster
ab7eac2200 xfs: remove int casts from debug dquot soft limit timer asserts
The int casts here make it easy to trigger an assert with a large
soft limit. For example, set a >4TB soft limit on an empty volume
to reproduce a (0 > -x) comparison due to an overflow of
d_blk_softlimit.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
2013-01-16 16:08:40 -06:00
Mark Tinguely
91e4bac0b7 xfs: fix the multi-segment log buffer format
Per Dave Chinner suggestion, this patch:
 1) Corrects the detection of whether a multi-segment buffer is
    still tracking data.
 2) Clears all the buffer log formats for a multi-segment buffer.

Signed-off-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
2013-01-16 16:08:08 -06:00
Mark Tinguely
2d0e9df579 xfs: fix segment in xfs_buf_item_format_segment
Not every segment in a multi-segment buffer is dirty in a
transaction and they will not be outputted. The assert in
xfs_buf_item_format_segment() that checks for the at least
one chunk of data in the segment to be used is not necessary
true for multi-segmented buffers.

Signed-off-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
2013-01-16 16:07:56 -06:00
Mark Tinguely
0f22f9d0cd xfs: rename bli_format to avoid confusion with bli_formats
Rename the bli_format structure to __bli_format to avoid
accidently confusing them with the bli_formats pointer.

Signed-off-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
2013-01-16 16:07:37 -06:00
Mark Tinguely
d44d9bc68e xfs: use b_maps[] for discontiguous buffers
Commits starting at 77c1a08 introduced a multiple segment support
to xfs_buf. xfs_trans_buf_item_match() could not find a multi-segment
buffer in the transaction because it was looking at the single segment
block number rather than the multi-segment b_maps[0].bm.bn. This
results on a recursive buffer lock that can never be satisfied.

This patch:
 1) Changed the remaining b_map accesses to be b_maps[0] accesses.
 2) Renames the single segment b_map structure to __b_map to avoid
    future confusion.

Signed-off-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
2013-01-16 16:07:11 -06:00
Linus Torvalds
31db720643 Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext3 and udf fixes from Jan Kara:
 "One ext3 performance regression fix and one udf regression fix (oops
  on interrupted mount)."

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  UDF: Fix a null pointer dereference in udf_sb_free_partitions
  jbd: don't wake kjournald unnecessarily
2013-01-16 10:55:10 -08:00
Namjae Jeon
1b1baff6e5 UDF: Fix a null pointer dereference in udf_sb_free_partitions
This patch fixes a regression caused by commit bff943af6f "udf: Fix memory
leak when mounting" due to which it was triggering a kernel null point
dereference in case of interrupted mount OR when allocating memory to
sbi->s_partmaps failed in function udf_sb_alloc_partition_maps.

Reported-and-tested-by: James Hogan <james@albanarts.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
Signed-off-by: Jan Kara <jack@suse.cz>
2013-01-14 22:53:47 +01:00
Eric Sandeen
7e2fb2d7e6 jbd: don't wake kjournald unnecessarily
Don't send an extra wakeup to kjournald in the case where we
already have the proper target in j_commit_request, i.e. that
commit has already been requested for commit.

commit d9b0193 "jbd: fix fsync() tid wraparound bug" changed
the logic leading to a wakeup, but it caused some extra wakeups
which were found to lead to a measurable performance regression.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
2013-01-14 22:50:45 +01:00
Linus Torvalds
6d283dba37 vfs: add missing virtual cache flush after editing partial pages
Andrew Morton pointed this out a month ago, and then I completely forgot
about it.

If we read a partial last page of a block device, we will zero out the
end of the page, but since that page can then be mapped into user space,
we should also make sure to flush the cache on architectures that have
virtual caches.  We have the flush_dcache_page() function for this, so
use it.

Now, in practice this really never matters, because nobody sane uses
virtual caches to begin with, and they largely exist on old broken RISC
arhitectures.

And even if you did run on one of those obsolete CPU's, the whole "mmap
and access the last partial page of a block device" behavior probably
doesn't actually exist.  The normal IO functions (read/write) will never
see the zeroed-out part of the page that migth not be coherent in the
cache, because they honor the size of the device.

So I'm marking this for stable (3.7 only), but I'm not sure anybody will
ever care.

Pointed-out-by: Andrew Morton <akpm@linux-foundation.org>
Cc: stable@vger.kernel.org  # 3.7
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-14 13:17:50 -08:00
Linus Torvalds
3441f0d26d Driver core fixes for 3.8-rc3
Here are two patches for 3.8-rc3.
 
 One removes the __dev* defines from init.h now that all usages of it are gone
 from your tree.  The other fix is for debugfs's paramater that was using the
 wrong base for the option.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core fixes from Greg Kroah-Hartman:
 "Here are two patches for 3.8-rc3.

  One removes the __dev* defines from init.h now that all usages of it
  are gone from your tree.  The other fix is for debugfs's paramater
  that was using the wrong base for the option.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

* tag 'driver-core-3.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  debugfs: convert gid= argument from decimal, not octal
  Remove __dev* markings from init.h
2013-01-14 09:07:11 -08:00
Xi Wang
6d92d4f6a7 fs/exec.c: work around icc miscompilation
The tricky problem is this check:

	if (i++ >= max)

icc (mis)optimizes this check as:

	if (++i > max)

The check now becomes a no-op since max is MAX_ARG_STRINGS (0x7FFFFFFF).

This is "allowed" by the C standard, assuming i++ never overflows,
because signed integer overflow is undefined behavior.  This
optimization effectively reverts the previous commit 362e6663ef
("exec.c, compat.c: fix count(), compat_count() bounds checking") that
tries to fix the check.

This patch simply moves ++ after the check.

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-11 14:54:55 -08:00
Dave Reisner
f1688e0431 debugfs: convert gid= argument from decimal, not octal
This patch technically breaks userspace, but I suspect that anyone who
actually used this flag would have encountered this brokenness, declared
it lunacy, and already sent a patch.

Signed-off-by: Dave Reisner <dreisner@archlinux.org>
Reviewed-by: Vasiliy Kulikov <segoon@openwall.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-11 05:56:01 -08:00
Randy Dunlap
254adaa465 seq_file: fix new kernel-doc warnings
Fix kernel-doc warnings in fs/seq_file.c:

  Warning(fs/seq_file.c:304): No description found for parameter 'whence'
  Warning(fs/seq_file.c:304): Excess function parameter 'origin' description in 'seq_lseek'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-10 14:35:24 -08:00
Linus Torvalds
5c33d9b248 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) New sysctl ndisc_notify needs some documentation, from Hanns
    Frederic Sowa.

 2) Netfilter REJECT target doesn't set transport header of SKB
    correctly, from Mukund Jampala.

 3) Forcedeth driver needs to check for DMA mapping failures, from Larry
    Finger.

 4) brcmsmac driver can't use usleep_range while holding locks, use
    udelay instead.  From Niels Ole Salscheider.

 5) Fix unregister of netlink bridge multicast database handlers, from
    Vlad Yasevich and Rami Rosen.

 6) Fix checksum calculations in netfilter's ipv6 network prefix
    translation module.

 7) Fix high order page allocation failures in netfilter xt_recent, from
    Eric Dumazet.

 8) mac802154 needs to use netif_rx_ni() instead of netif_rx() because
    mac802154_process_data() can execute in process rather than
    interrupt context.  From Alexander Aring.

 9) Fix splice handling of MSG_SENDPAGE_NOTLAST, otherwise we elide one
    tcp_push() too many.  From Eric Dumazet and Willy Tarreau.

10) Fix skb->truesize tracking in XEN netfront driver, from Ian
    Campbell.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (46 commits)
  xen/netfront: improve truesize tracking
  ipv4: fix NULL checking in devinet_ioctl()
  tcp: fix MSG_SENDPAGE_NOTLAST logic
  net/ipv4/ipconfig: really display the BOOTP/DHCP server's address.
  ip-sysctl: fix spelling errors
  mac802154: fix NOHZ local_softirq_pending 08 warning
  ipv6: document ndisc_notify in networking/ip-sysctl.txt
  ath9k: Fix Kconfig for ATH9K_HTC
  netfilter: xt_recent: avoid high order page allocations
  netfilter: fix missing dependencies for the NOTRACK target
  netfilter: ip6t_NPT: fix IPv6 NTP checksum calculation
  bridge: add empty br_mdb_init() and br_mdb_uninit() definitions.
  vxlan: allow live mac address change
  bridge: Correctly unregister MDB rtnetlink handlers
  brcmfmac: fix parsing rsn ie for ap mode.
  brcmsmac: add copyright information for Canonical
  rtlwifi: rtl8723ae: Fix warning for unchecked pci_map_single() call
  rtlwifi: rtl8192se: Fix warning for unchecked pci_map_single() call
  rtlwifi: rtl8192de: Fix warning for unchecked pci_map_single() call
  rtlwifi: rtl8192ce: Fix warning for unchecked pci_map_single() call
  ...
2013-01-08 07:31:49 -08:00
Linus Torvalds
127aa93066 Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
Pull CIFS fixes from Steve French:
 "Misc small cifs fixes"

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
  CIFS: Don't let read only caching for mandatory byte-range locked files
  CIFS: Fix write after setting a read lock for read oplock files
  Revert "CIFS: Fix write after setting a read lock for read oplock files"
  cifs: adjust sequence number downward after signing NT_CANCEL request
  cifs: move check for NULL socket into smb_send_rqst
2013-01-07 13:21:55 -08:00
Linus Torvalds
f77637206d Bug fixes, including two regressions introduced in v3.8. The most
serious of these regressions is a buffer cache leak.
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 regression fixes from Ted Ts'o:
 "Bug fixes, including two regressions introduced in v3.8.  The most
  serious of these regressions is a buffer cache leak."

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: remove duplicate call to ext4_bread() in ext4_init_new_dir()
  ext4: release buffer in failed path in dx_probe()
  ext4: fix configuration dependencies for ext4 ACLs and security labels
2013-01-07 09:22:50 -08:00
Linus Torvalds
4c9014f2ca NFS client bugfixes for Linux 3.8
- Fix a permissions problem when opening NFSv4 files that only have the
   exec bit set.
 - Fix a couple of typos in pNFS (inverted logic), and the mount parsing
   (missing pointer dereference).
 - Work around a series of deadlock issues due to workqueues using
   struct work_struct pointer address comparisons in the re-entrancy
   tests. Ensure that we don't free struct work_struct prematurely if
   our work function involves waiting for completion of other work
   items (e.g. by calling rpc_shutdown_client).
 - Revert the part of commit 168e4b3 that is causing unnecessary warnings
   to be issued in the nfsd callback code.
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Merge tag 'nfs-for-3.8-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:

 - Fix a permissions problem when opening NFSv4 files that only have the
   exec bit set.

 - Fix a couple of typos in pNFS (inverted logic), and the mount parsing
   (missing pointer dereference).

 - Work around a series of deadlock issues due to workqueues using
   struct work_struct pointer address comparisons in the re-entrancy
   tests.  Ensure that we don't free struct work_struct prematurely if
   our work function involves waiting for completion of other work items
   (e.g. by calling rpc_shutdown_client).

 - Revert the part of commit 168e4b3 that is causing unnecessary
   warnings to be issued in the nfsd callback code.

* tag 'nfs-for-3.8-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  nfs: avoid dereferencing null pointer in initiate_bulk_draining
  SUNRPC: Partial revert of commit 168e4b39d1
  NFS: Ensure that we free the rpc_task after read and write cleanups are done
  SUNRPC: Ensure that we free the rpc_task after cleanups are done
  nfs: fix null checking in nfs_get_option_str()
  pnfs: Increase the refcount when LAYOUTGET fails the first time
  NFS: Fix access to suid/sgid executables
2013-01-07 08:36:45 -08:00
Eric Dumazet
ae62ca7b03 tcp: fix MSG_SENDPAGE_NOTLAST logic
commit 35f9c09fe9 (tcp: tcp_sendpages() should call tcp_push() once)
added an internal flag : MSG_SENDPAGE_NOTLAST meant to be set on all
frags but the last one for a splice() call.

The condition used to set the flag in pipe_to_sendpage() relied on
splice() user passing the exact number of bytes present in the pipe,
or a smaller one.

But some programs pass an arbitrary high value, and the test fails.

The effect of this bug is a lack of tcp_push() at the end of a
splice(pipe -> socket) call, and possibly very slow or erratic TCP
sessions.

We should both test sd->total_len and fact that another fragment
is in the pipe (pipe->nrbufs > 1)

Many thanks to Willy for providing very clear bug report, bisection
and test programs.

Reported-by: Willy Tarreau <w@1wt.eu>
Bisected-by: Willy Tarreau <w@1wt.eu>
Tested-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-06 20:58:13 -08:00
Guo Chao
fef0ebdb22 ext4: remove duplicate call to ext4_bread() in ext4_init_new_dir()
This fixes a buffer cache leak when creating a directory, introduced
in commit a774f9c20.

Signed-off-by: Guo Chao <yan@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Tao Ma <boyu.mt@taobao.com>
2013-01-06 23:40:25 -05:00
Guo Chao
0ecaef0644 ext4: release buffer in failed path in dx_probe()
If checksum fails, we should also release the buffer
read from previous iteration.

Signed-off-by: Guo Chao <yan@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>-
Cc: stable@vger.kernel.org
--
 fs/ext4/namei.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
2013-01-06 23:38:47 -05:00
Valerie Aurora
96465efee1 ext4: fix configuration dependencies for ext4 ACLs and security labels
Commit "ext4: Remove CONFIG_EXT4_FS_XATTR" removed the configuration
dependencies for ext4 xattrs from the ext4 ACLs and security labels
configuration options, but did not replace them with a dependency on
ext4 itself.  Add back the dependency on ext4 so the options only show
up if ext4 is enabled.

Signed-off-by: Valerie Aurora <val@vaaconsulting.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Tao Ma <boyu.mt@taobao.com>
2013-01-06 23:38:44 -05:00
Nickolai Zeldovich
ecf0eb9edb nfs: avoid dereferencing null pointer in initiate_bulk_draining
Fix an inverted null pointer check in initiate_bulk_draining().

Signed-off-by: Nickolai Zeldovich <nickolai@csail.mit.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org [>= 3.7]
2013-01-05 14:26:51 -05:00
Trond Myklebust
6db6dd7d3f NFS: Ensure that we free the rpc_task after read and write cleanups are done
This patch ensures that we free the rpc_task after the cleanup callbacks
are done in order to avoid a deadlock problem that can be triggered if
the callback needs to wait for another workqueue item to complete.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Weston Andros Adamson <dros@netapp.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Bruce Fields <bfields@fieldses.org>
Cc: stable@vger.kernel.org [>= 3.5]
2013-01-04 12:59:10 -05:00
Xi Wang
e25fbe380c nfs: fix null checking in nfs_get_option_str()
The following null pointer check is broken.

	*option = match_strdup(args);
	return !option;

The pointer `option' must be non-null, and thus `!option' is always false.
Use `!*option' instead.

The bug was introduced in commit c5cb09b6f8 ("Cleanup: Factor out some
cut-and-paste code.").

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2013-01-04 10:54:43 -05:00
Yanchuan Nian
39e88fcfb1 pnfs: Increase the refcount when LAYOUTGET fails the first time
The layout will be set unusable if LAYOUTGET fails. Is it reasonable to
increase the refcount iff LAYOUTGET fails the first time?

Signed-off-by: Yanchuan Nian <ycnian@gmail.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org [>= 3.7]
2013-01-04 10:50:42 -05:00
Linus Torvalds
49569646b2 Driver core __dev* removal patches
Here are the remaining __dev* removal patches against the 3.8-rc2 tree.
 All of these patches were previously sent to the subsystem maintainers,
 most of them were picked up and pushed to you, but there were a number
 that fell through the cracks, and new drivers were added during the
 merge window, so this series cleans up the rest of the instances of
 these markings.
 
 Third time's the charm...
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core __dev* removal patches - take 3 - from Greg Kroah-Hartman:
 "Here are the remaining __dev* removal patches against the 3.8-rc2
  tree.  All of these patches were previously sent to the subsystem
  maintainers, most of them were picked up and pushed to you, but there
  were a number that fell through the cracks, and new drivers were added
  during the merge window, so this series cleans up the rest of the
  instances of these markings.

  Third time's the charm...

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

Fixed up trivial conflict with the pinctrl pull in pinctrl-sirf.c.

* tag 'driver-core-3.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (54 commits)
  misc: remove __dev* attributes.
  include: remove __dev* attributes.
  Documentation: remove __dev* attributes.
  Drivers: misc: remove __dev* attributes.
  Drivers: block: remove __dev* attributes.
  Drivers: bcma: remove __dev* attributes.
  Drivers: char: remove __dev* attributes.
  Drivers: clocksource: remove __dev* attributes.
  Drivers: ssb: remove __dev* attributes.
  Drivers: dma: remove __dev* attributes.
  Drivers: gpu: remove __dev* attributes.
  Drivers: infinband: remove __dev* attributes.
  Drivers: memory: remove __dev* attributes.
  Drivers: mmc: remove __dev* attributes.
  Drivers: iommu: remove __dev* attributes.
  Drivers: power: remove __dev* attributes.
  Drivers: message: remove __dev* attributes.
  Drivers: macintosh: remove __dev* attributes.
  Drivers: mfd: remove __dev* attributes.
  pstore: remove __dev* attributes.
  ...
2013-01-03 16:17:50 -08:00