Commit Graph

5114 Commits

Author SHA1 Message Date
Trond Myklebust
2b82f190c8 NFS: Fix race in nfs_set_page_dirty
Protect nfs_set_page_dirty() against races with nfs_inode_add_request.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-20 22:56:30 -07:00
Trond Myklebust
612c9384fd NFS: Fix the 'desynchronized value of nfs_i.ncommit' error
Redirtying a request that is already marked for commit will screw up the
accounting for NR_UNSTABLE_NFS as well as nfs_i.ncommit.
Ensure that all requests on the commit queue are labelled with the
PG_NEED_COMMIT flag, and avoid moving them onto the dirty list inside
nfs_page_mark_flush().

Also inline nfs_mark_request_dirty() into nfs_page_mark_flush() for
atomicity reasons. Avoid dropping the spinlock until we're done marking the
request in the radix tree and have added it to the ->dirty list.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-20 22:56:29 -07:00
Trond Myklebust
6d677e3504 NFS: Don't clear PG_writeback until after we've processed unstable writes
Ensure that we don't release the PG_writeback lock until after the page has
either been redirtied, or queued on the nfs_inode 'commit' list.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-20 22:56:29 -07:00
Trond Myklebust
8e821cad12 NFS: clean up the unstable write code
Get rid of the inlined #ifdefs.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-20 22:56:29 -07:00
Evgeniy Dushistov
07a0cfec30 ufs proper handling of zero link case
This patch should fix or partly fix this bug:
http://bugzilla.kernel.org/show_bug.cgi?id=8276

The problem is:

- if we see "zero link case" during reading inode operation, we call
  ufs_error(which remount fs readonly), but not "mark" inode as bad (1)

- in readonly case we do not fill some data structures, which are used in
  read and write case (2)

- VFS call ufs_delete_inode if link count is zero (3)

so (1)->(3)->(2) cause oops, this patch should fix such scenario

Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru>
Cc: Jim Paris <jim@jtan.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-17 16:36:27 -07:00
Alan Cox
c4bbafda70 exec.c: fix coredump to pipe problem and obscure "security hole"
The patch checks for "|" in the pattern not the output and doesn't nail a
pid on to a piped name (as it is a program name not a file)

Also fixes a very very obscure security corner case.  If you happen to have
decided on a core pattern that starts with the program name then the user
can run a program called "|myevilhack" as it stands.  I doubt anyone does
this.

Signed-off-by: Alan Cox <alan@redhat.com>
Confirmed-by: Christopher S. Aker <caker@theshore.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-17 16:36:26 -07:00
Trond Myklebust
eb4cac10d9 NFS: Fix a list corruption problem
We must remove the request from whatever list it is currently on before we
can add it to the dirty list.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-15 16:48:11 -07:00
Trond Myklebust
5a6d41b32a NFS: Ensure PG_writeback is cleared when writeback fails
If the writebacks are cancelled via nfs_cancel_dirty_list, or due to the
memory allocation failing in nfs_flush_one/nfs_flush_multi, then we must
ensure that the PG_writeback flag is cleared.

Also ensure that we actually own the PG_writeback flag whenever we
schedule a new writeback by making nfs_set_page_writeback() return the
value of test_set_page_writeback().
The PG_writeback page flag ends up replacing the functionality of the
PG_FLUSHING nfs_page flag, so we rip that out too.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-14 21:46:48 -07:00
Trond Myklebust
60fa3f769f NFS: Fix two bugs in the O_DIRECT write code
Do not flag an error if the COMMIT call fails and we decide to resend the
writes. Let the resend flag the error if it fails.

If a write has failed, then nfs_direct_write_result should not attempt to
send a commit. It should just exit asap and return the error to the user.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-14 21:46:48 -07:00
Trond Myklebust
e1552e1998 NFS: Fix an Oops in nfs_setattr()
It looks like nfs_setattr() and nfs_rename() also need to test whether the
target is a regular file before calling nfs_wb_all()...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-14 21:46:47 -07:00
Jeff Mahoney
c3724b129b [PATCH] autofs4: fix race in unhashed dentry code
Commit f50b6f8691 introduced a race in
autofs4 between autofs_lookup_unhashed() and autofs_dentry_release().

autofs_dentry_release() ends up clearing the ->dentry and ->inode members
of autofs_info before removing it from the rehash list.  The list is
protected by the rehash lock in both functions, but since
autofs_dentry_release() starts tearing the autofs_info struct down before
removing it from the list, autofs_lookup_unhashed() can get a autofs_info
with a NULL dentry.

This patch moves the clearing of ->dentry and ->inode after the removal
from the rehash list.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Acked-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-12 15:31:42 -07:00
Vladimir Saveliev
6d205f1205 [PATCH] reiserfs: fix key decrementing
This patch fixes a bug in function decrementing a key of stat data item.

Offset of reiserfs keys are compared as signed values.  To set key offset
to maximal possible value maximal signed value has to be used.

This bug is responsible for severe reiserfs filesystem corruption which
shows itself as warning vs-13060.  reiserfsck fixes this corruption by
filesystem tree rebuilding.

Signed-off-by: Vladimir Saveliev <vs@namesys.com>
Cc: <reiserfs-dev@namesys.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-12 15:31:42 -07:00
Timo Savola
a5bfffac64 [PATCH] fuse: validate rootmode mount option
If rootmode isn't valid, we hit the BUG() in fuse_init_inode.  Now
EINVAL is returned.

Signed-off-by: Timo Savola <tsavola@movial.fi>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-08 19:47:55 -07:00
Andrew Morton
2363cc0264 [PATCH] remove protection of LANANA-reserved majors
Revert all this.  It can cause device-mapper to receive a different major from
earlier kernels and it turns out that the Amanda backup program (via GNU tar,
apparently) checks major numbers on files when performing incremental backups.

Which is a bit broken of Amanda (or tar), but this feature isn't important
enough to justify the churn.

Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-04 21:12:47 -07:00
Andrew Morton
7479d2b90b [PATCH] revert "retries in ext4_prepare_write() violate ordering requirements"
Revert b46be05004.  Same reasoning as for ext3.

Cc: Kirill Korotaev <dev@openvz.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Ken Chen <kenneth.w.chen@intel.com>
Cc: Andrey Savochkin <saw@sw.ru>
Cc: <linux-ext4@vger.kernel.org>
Cc: Dmitriy Monakhov <dmonakhov@openvz.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-02 10:06:08 -07:00
Andrew Morton
1aa9b4b9bc [PATCH] revert "retries in ext3_prepare_write() violate ordering requirements"
Revert e92a4d595b.

Dmitry points out

"When we block_prepare_write() failed while ext3_prepare_write() we jump to
 "failure" label and call ext3_prepare_failure() witch search last mapped bh
 and invoke commit_write untill it.  This is wrong!!  because some bh from
 begining to the last mapped bh may be not uptodate.  As a result we commit to
 disk not uptodate page content witch contains garbage from previous usage."

and

"Unexpected file size increasing."

   Call trace the same as it was in first issue but result is different.
   For example we have file with i_size is zero.  we want write two blocks ,
   but fs has only one free block.

   ->ext3_prepare_write(...from == 0, to == 2048)
     retry:
     ->block_prepare_write() == -ENOSPC# we failed but allocated one block here.
     ->ext3_prepare_failure()
       ->commit_write( from == 0, to == 1024) # after this i_size becomes 1024 :)
     if (ret == -ENOSPC && ext3_should_retry_alloc(inode->i_sb, &retries))
        goto retry;

   Finally when all retries will be spended ext3_prepare_failure return
   -ENOSPC, but i_size was increased and later block trimm procedures can't
   help here.

We don't appear to have the horsepower to fix these issues, so let's put
things back the way they were for now.

Cc: Kirill Korotaev <dev@openvz.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Ken Chen <kenneth.w.chen@intel.com>
Cc: Andrey Savochkin <saw@sw.ru>
Cc: <linux-ext4@vger.kernel.org>
Cc: Dmitriy Monakhov <dmonakhov@openvz.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-02 10:06:08 -07:00
Brian Pomerantz
0322170260 [PATCH] fix page leak during core dump
When the dump cannot occur most likely because of a full file system and
the page to be written is the zero page, the call to page_cache_release()
is missed.

Signed-off-by: Brian Pomerantz <bapper@mvista.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: David Howells <dhowells@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-02 10:06:08 -07:00
Andrew Morton
05565b65a5 [PATCH] proc: fix linkage with CONFIG_SYSCTL=y, CONFIG_PROC_SYSCTL=n
We're using #ifdef CONFIG_SYSCTL, but we should be using CONFIG_PROC_SYSCTL,
so we get

 fs/built-in.o: In function `proc_root_init':
 /usr/src/linux/fs/proc/root.c:83: undefined reference to `proc_sys_init'

Fix that up and remove an ifdef-in-C.

Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Helge Hafting <helgehaf@aitel.hist.no>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-02 10:06:08 -07:00
Linus Torvalds
22c8c65d24 Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block:
  [PATCH] splice: partial write fix
2007-03-29 08:23:52 -07:00
Paolo 'Blaisorblade' Giarrusso
75e8defbe4 [PATCH] uml: hostfs variable renaming
* rename name to host_root_path
* rename data to req_root.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-29 08:22:25 -07:00
Jeff Dike
622e696938 [PATCH] uml: fix compilation problems
Fix a few miscellaneous compilation problems -
	an assignment with mismatched types in ldt.c
	a missing include in mconsole.h which needs a definition of uml_pt_regs
	I missed removing an include of user_util.h in hostfs

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-29 08:22:25 -07:00
Dmitriy Monakhov
d9993c37ef [PATCH] splice: partial write fix
Currently if partial write has happened while ->commit_write() then page
wasn't marked as accessed and rebalanced.

Signed-off-by: Monakhov Dmitriy <dmonakhov@openvz.org>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-03-29 14:26:42 +02:00
Linus Torvalds
e5c465f5d9 Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2:
  ocfs2_dlm: Check for migrateable lockres in dlm_empty_lockres()
  ocfs2_dlm: Fix lockres ref counting bug
2007-03-28 14:02:03 -07:00
Jeff Garzik
a9c87a10db Merge branch 'upstream-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 into upstream-fixes 2007-03-28 02:21:18 -04:00
Zach Brown
28defbea64 [PATCH] aio: remove bare user-triggerable error printk
The user can generate console output if they cause do_mmap() to fail
during sys_io_setup().  This was seen in a regression test that does
exactly that by spinning calling mmap() until it gets -ENOMEM before
calling io_setup().

We don't need this printk at all, just remove it.

Signed-off-by: Zach Brown <zach.brown@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-27 17:53:25 -07:00
Jean Tourrilhes
ed4bb10631 [PATCH] wext: Add missing ioctls to 64<->32 conversion
Johannes Berg and Michael Buesch noticed that the WPA ioctls
were missing from the 64<->32 bit conversion. This means that when
using a 32 bits userspace on a 64 bit kernel, those ioctls fail.

Signed-off-by: Jean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2007-03-27 14:10:17 -04:00
Linus Torvalds
e0ab0bb6d2 Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block:
  Export __splice_from_pipe()
  2/2 splice: dont readpage
  1/2 splice: dont steal
  make elv_register() output atomic
  block: blk_max_pfn is somtimes wrong
2007-03-27 09:05:49 -07:00
Mika Kukkonen
5c46010af2 [PATCH] Fix kernel build with EMBEDDED & PROC_FS & !PROC_SYSCTL
Without attached patch against current -git I get following with
!PROC_SYSCTL (with EMBEDDED and PROC_FS set):

    CC      init/version.o
    LD      init/built-in.o
    LD      vmlinux
  fs/built-in.o: In function `do_proc_sys_lookup':
  proc_sysctl.c:(.text+0x26583): undefined reference to `sysctl_head_next'
  fs/built-in.o: In function `proc_sys_revalidate':
  proc_sysctl.c:(.text+0x265bb): undefined reference to `sysctl_head_finish'
  fs/built-in.o: In function `proc_sys_readdir':
  proc_sysctl.c:(.text+0x26720): undefined reference to `sysctl_head_next'
  proc_sysctl.c:(.text+0x267d8): undefined reference to `sysctl_head_finish'
  proc_sysctl.c:(.text+0x268e7): undefined reference to `sysctl_head_next'
  proc_sysctl.c:(.text+0x26910): undefined reference to `sysctl_head_finish'
  fs/built-in.o: In function `proc_sys_write':
  proc_sysctl.c:(.text+0x2695d): undefined reference to `sysctl_perm'
  proc_sysctl.c:(.text+0x2699c): undefined reference to `sysctl_head_finish'
  fs/built-in.o: In function `proc_sys_read':
  proc_sysctl.c:(.text+0x269e9): undefined reference to `sysctl_perm'
  proc_sysctl.c:(.text+0x26a25): undefined reference to `sysctl_head_finish'
  fs/built-in.o: In function `proc_sys_permission':
  proc_sysctl.c:(.text+0x26ad1): undefined reference to `sysctl_perm'
  proc_sysctl.c:(.text+0x26adb): undefined reference to `sysctl_head_finish'
  fs/built-in.o: In function `proc_sys_lookup':
  proc_sysctl.c:(.text+0x26b39): undefined reference to `sysctl_head_finish'
  make: *** [vmlinux] Virhe 1

All those functions are in fs/proc/proc_sysctl.c, which has no CONFIG_
#define's in it, so the patch makes the compilation of that file to depend
on CONFIG_PROC_SYSCTL (the simplest choice).

Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-27 09:05:16 -07:00
J. Bruce Fields
79f6523a16 [PATCH] knfsd: nfsd4: remove superfluous cancel_delayed_work() call
This cancel_delayed_work call is called from a function that is only called
from a piece of code that immediate follows a cancel and destruction of the
workqueue, so it's clearly a mistake.

Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-27 09:05:14 -07:00
Bruce Fields
21315edd48 [PATCH] knfsd: nfsd4: demote "clientid in use" printk to a dprintk
The reused clientid here is a more of a problem for the client than the
server, and the client can report the problem itself if it's serious.

Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-27 09:05:14 -07:00
Bruce Fields
54c0440949 [PATCH] knfsd: nfsd4: fix inheritance flags on v4 ace derived from posix default ace
A regression introduced in the last set of acl patches removed the
INHERIT_ONLY flag from aces derived from the posix acl.  Fix.

Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-27 09:05:14 -07:00
NeilBrown
598b9a5637 [PATCH] knfsd: allow nfsd READDIR to return 64bit cookies
->readdir passes lofft_t offsets (used as nfs cookies) to
nfs3svc_encode_entry{,_plus}, but when they pass it on to encode_entry it
becomes an 'off_t', which isn't good.

So filesystems that returned 64bit offsets would lose.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-27 09:05:14 -07:00
Mark Fasheh
40bee44eae Export __splice_from_pipe()
Ocfs2 wants to implement it's own splice write actor so that it can better
manage cluster / page locks. This lets us re-use the rest of splice write
while only providing our own code where it's actually important.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-03-27 08:55:47 +02:00
Nick Piggin
08c7259163 2/2 splice: dont readpage
Splice does not need to readpage to bring the page uptodate before writing
to it, because prepare_write will take care of that for us.

Splice is also wrong to SetPageUptodate before the page is actually uptodate.
This results in the old uninitialised memory leak. This gets fixed as a
matter of course when removing the readpage logic.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-03-27 08:55:39 +02:00
Nick Piggin
485ddb4b97 1/2 splice: dont steal
Stealing pages with splice is problematic because we cannot just insert
an uptodate page into the pagecache and hope the filesystem can take care
of it later.

We also cannot just ClearPageUptodate, then hope prepare_write does not
write anything into the page, because I don't think prepare_write gives
that guarantee.

Remove support for SPLICE_F_MOVE for now. If we really want to bring it
back, we might be able to do so with a the new filesystem buffered write
aops APIs I'm working on. If we really don't want to bring it back, then
we should decide that sooner rather than later, and remove the flag and
all the stealing infrastructure before anybody starts using it.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-03-27 08:55:08 +02:00
Sunil Mushran
2f5bf1f2d0 ocfs2_dlm: Check for migrateable lockres in dlm_empty_lockres()
In dlm_migrate_lockres(), we check upfront whether the lockres is a
candidate for migration. This patch encapsulates that code in a separate
function so that dlm_empty_lockres() can also use it during umount. This
patch addresses the umount process spinning problem.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-03-26 16:51:15 -07:00
Sunil Mushran
78062cb2e5 ocfs2_dlm: Fix lockres ref counting bug
During umount, the umount thread migrates the lockres' and the dlm_thread
frees the empty lockres'. Due to a race, the reference counting on the
lockres goes awry leading to extra puts.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2007-03-26 16:50:52 -07:00
Adrian Bunk
d32b687e2e 9p: make struct v9fs_cached_file_operations static
This patch makes te needlessly global struct v9fs_cached_file_operations
static.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2007-03-26 18:14:44 +00:00
Andrew Morton
105fd108a6 [PATCH] "ext[34]: EA block reference count racing fix" performance fix
A little mistake in 8a2bfdcbfa is making all
transactions synchronous, which reduces ext3 performance to comical levels.

Cc: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-23 11:01:22 -07:00
David Howells
aa289b4723 [PATCH] FDPIC: fix the /proc/pid/stat representation of executable boundaries
Fix the /proc/pid/stat representation of executable boundaries.  It should
show the bounds of the executable, but instead shows the bounds of the
loader.

Before the patch is applied, the bug can be seen by examining, say, inetd:

	# ps | grep inetd
	  610         root          0   S   /usr/sbin/inetd -i
	# cat /proc/610/maps
	c0bb0000-c0bba788 r-xs 00000000 00:0b 14582157  /lib/ld-uClibc-0.9.28.so
	c3180000-c31dede4 r-xs 00000000 00:0b 14582179  /lib/libuClibc-0.9.28.so
	c328c000-c328ea00 rw-p 00008000 00:0b 14582157  /lib/ld-uClibc-0.9.28.so
	c3290000-c329b6c0 rw-p 00000000 00:00 0
	c32a0000-c32c0000 rwxp 00000000 00:00 0
	c32d4000-c32d8000 rw-p 00000000 00:00 0
	c3394000-c3398000 rw-p 00000000 00:00 0
	c3458000-c345f464 r-xs 00000000 00:0b 16384612  /usr/sbin/inetd
	c3470000-c34748f8 rw-p 00004000 00:0b 16384612  /usr/sbin/inetd
	c34cc000-c34d0000 rw-p 00000000 00:00 0
	c34d4000-c34d8000 rw-p 00000000 00:00 0
	c34d8000-c34dc000 rw-p 00000000 00:00 0
	# cat /proc/610/stat
	610 (inetd) S 1 610 610 0 -1 256 0 0 0 0 0 8 0 0 19 0 1 0 94392000718
	950272 0 4294967295 3233480704 3233523592 3274440352 3274439976
 	3273467584 0 0 4096 90115 3221712796 0 0 17 0 0 0 0

The code boundaries are 3233480704 to 3233523592, which are:

	(gdb) p/x 3233480704
	$1 = 0xc0bb0000
	(gdb) p/x 3233523592
	$2 = 0xc0bba788

Which corresponds to this line in the maps file:

	c0bb0000-c0bba788 r-xs 00000000 00:0b 14582157  /lib/ld-uClibc-0.9.28.so

Which is wrong.  After the patch is applied, the maps file is pretty much
identical (there's some minor shuffling of the location of some of the
anonymous VMAs), but the stat file is now:

	# cat /proc/610/stat
	610 (inetd) S 1 610 610 0 -1 256 0 0 0 0 0 7 0 0 18 0 1 0 94392000722
	950272 0 4294967295 3276111872 3276141668 3274440352 3274439976
	3273467584 0 0 4096 90115 3221712796 0 0 17 0 0 0 0

The code boundaries are then 3276111872 to 3276141668, which are:

	(gdb) p/x 3276111872
	$1 = 0xc3458000
	(gdb) p/x 3276141668
	$2 = 0xc345f464

And these correspond to this line in the maps file instead:

	c3458000-c345f464 r-xs 00000000 00:0b 16384612  /usr/sbin/inetd

Which is now correct.

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>
2007-03-23 11:01:21 -07:00
Linus Torvalds
12998096cc Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  [CIFS] Allow reset of file to ATTR_NORMAL when archive bit not set
  [CIFS] Do not negotiate new POSIX_PATH_OPERATIONS_CAP yet
  [CIFS] reset mode when client notices that ATTR_READONLY is no longer set
2007-03-22 19:47:09 -07:00
Rafael J. Wysocki
b43376927a [PATCH] Make XFS workqueues nonfreezable
Since freezable workqueues are broken in 2.6.21-rc
(cf. http://marc.theaimsgroup.com/?l=linux-kernel&m=116855740612755,
http://marc.theaimsgroup.com/?l=linux-kernel&m=117261312523921&w=2)
it's better to change the only user of them, which is XFS, to use "normal"
nonfreezable workqueues.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: David Chinner <dgc@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-22 19:39:06 -07:00
Steve French
066fcb06d3 [CIFS] Allow reset of file to ATTR_NORMAL when archive bit not set
When a file had a dos attribute of 0x1 (readonly - but dos attribute
of archive was not set) - doing chmod 0777 or equivalent would
try to set a dos attribute of 0 (which some servers ignore)
rather than ATTR_NORMAL (0x20) which most servers accept.
Does not affect servers which support the CIFS Unix Extensions.

Acked-by: Prasad Potluri <pvp@us.ibm.com>
Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-03-23 00:45:08 +00:00
James Bottomley
d1cabd6326 [PATCH] fix process crash caused by randomisation and 64k pages
This bug was seen on ppc64, but it could have occurred on any
architecture with a page size of 64k or above.  The problem is that in
fs/binfmt_elf.c:randomize_stack_top() randomizes the stack to within
0x7ff pages.  On 4k page machines, this is 8MB; on 64k page boxes, this
is 128MB.

The problem is that the new binary layout (selected in
arch_pick_mmap_layout) places the mapping segment 128MB or the stack
rlimit away from the top of the process memory, whichever is larger.  If
you chose an rlimit of less than 128MB (most defaults are in the 8Mb
range) then you can end up having your entire stack randomized away.

The fix is to make randomize_stack_top() only steal at most 8MB, which this
patch does.  However, I have to point out that even with this, your stack
rlimit might not be exactly what you get if it's > 128MB, because you're
still losing the random offset of up to 8MB.

The true fix should be to leave an explicit gap for the randomization plus
a buffer when determining mmap_base, but that would involve fixing all the
architectures.

Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-16 19:25:06 -07:00
Johannes Berg
e5d480ff17 [PATCH] change misleading EFI partition support description
Remove the misleading "Presently only useful on the IA-64 platform" text
from the EFI partition Kconfig.

EFI partitions are also used by Apple on their Intel-based machines and
thus you need EFI partition support if you (for example) want to attach
such a machine in target disk mode.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-16 19:25:06 -07:00
Trond Myklebust
634707388b [PATCH] nfs: nfs_getattr() can't call nfs_sync_mapping_range() for non-regular files
Looks like we need a check in nfs_getattr() for a regular file. It makes
no sense to call nfs_sync_mapping_range() on anything else. I think that
should fix your problem: it will stop the NFS client from interfering
with dirty pages on that inode's mapping.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Olof Johansson <olof@lixom.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-16 19:25:06 -07:00
Peter Zijlstra
89a09141df [PATCH] nfs: fix congestion control
The current NFS client congestion logic is severly broken, it marks the
backing device congested during each nfs_writepages() call but doesn't
mirror this in nfs_writepage() which makes for deadlocks.  Also it
implements its own waitqueue.

Replace this by a more regular congestion implementation that puts a cap on
the number of active writeback pages and uses the bdi congestion waitqueue.

Also always use an interruptible wait since it makes sense to be able to
SIGKILL the process even for mounts without 'intr'.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-16 19:25:05 -07:00
suzuki
b74a2f0913 [PATCH] fix rescan_partitions to return errors properly
The only error code which comes from the partition checkers is -1, when
they finds an EIO.  As per the discussion, ENOMEM values were ignored,
as they might scare the users.

So, with the current code, we end up returning -1 and not EIO for the
ioctl() calls.  Which doesn't give any clue to the user of what went
wrong.

Signed-off-by: Suzuki K P <suzuki@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-16 19:25:05 -07:00
Vasily Averin
1174cf7301 [PATCH] smbfs: double free memory corruption
smbfs allocates rq_trans2buffer to handle server's multi transaction2 response
messages.  As struct smb_request may be reused, rq_trans2buffer is freed
before each new request.  However if last servers's response is not multi but
single trans2 message then new rq_trans2buffer is not allocated but last
smb_rput still tries to free it again.

To prevent this issue rq_trans2buffer pointer should be set to NULL after
kfree.

Signed-off-by: Vasily Averin <vvs@sw.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-16 19:25:05 -07:00
Michael Halcrow
b228b8e5bf [PATCH] eCryptfs: fix possible NULL ptr deref in ecryptfs_d_release()
ecryptfs_d_release() first dereferences a pointer (via
ecryptfs_dentry_to_lower()) and then afterwards checks to see if the
pointer it just dereferenced is NULL (via ecryptfs_dentry_to_private()).

This patch moves all of the work done on the dereferenced pointer inside a
block governed by the condition that the pointer is non-NULL.

Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-03-16 19:25:05 -07:00