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  1. 27 11月, 2007 7 次提交
  3. 18 11月, 2007 8 次提交
    • N
      kernel BUG at fs/nfs/namespace.c:108! - can be triggered by bad server · 4c1fe2f7
      由 Neil Brown 提交于 
      
Hi Trond,

I have discovered that the BUG_ON in nfs_follow_mountpoint:

	BUG_ON(IS_ROOT(dentry));

can be triggered by a misbehaving server.

What happens is the client does a lookup and discoveres that the named
directory has a different fsid, so it initiates a mount.
It then performs a GETATTR on the mounted directory and gets a
different fsid again (due to a bug in the NFS server).
This causes nfs_follow_mountpoint to be called on the newly mounted
root, which triggers the BUG_ON.

To duplicate this, have a directory which contains some mountpoints,
and export that directory with the "crossmnt" flag using nfs-utils
1.1.1 (or 1.1.0 I think)

The GETATTR on the root of the mounted filesystem will return the
information for the top exportpoint, while a lookup will return the
correct information.  This difference causes the NFS client to BUG.

I think the best way to fix this is to trap this possibility early, so
just before completing the mount in the NFS client, check that it isn't
going to use nfs_mountpoint_inode_operations.
As long as i_op will never change once set (is that true?), this
should be adequately safe.

The following patch shows a possible approach, and it works for me.
i.e. when the NFS server is misbehaving, I get ESTALE on those
mountpoints, while when the NFS server is working correctly, I get
correct behaviour on the client.

NeilBrown
Signed-off-by: NNeil Brown <neilb@suse.de>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      4c1fe2f7
    • J
      sunrpc: rpc_pipe_poll may miss available data in some cases · eda4f9b7
      由 J. Bruce Fields 提交于 
      Pipe messages start out life on a queue on the inode, but when first
read they're moved to the filp's private pointer.  So it's possible for
a poll here to return null even though there's a partially read message
available.
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      eda4f9b7
    • K
      sunrpc: return error if unsupported enctype or cksumtype is encountered · ef338bee
      由 Kevin Coffman 提交于 
      Return an error from gss_import_sec_context_kerberos if the
negotiated context contains encryption or checksum types not
supported by the kernel code.

This fixes an Oops because success was assumed and later code found
no internal_ctx_id.
Signed-off-by: NKevin Coffman <kwc@citi.umich.edu>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      ef338bee
    • K
      sunrpc: gss_pipe_downcall(), don't assume all errors are transient · ffc40f56
      由 Kevin Coffman 提交于 
      Instead of mapping all errors except EACCES to EAGAIN, map all errors
except EAGAIN to EACCES.

An example is user-land negotiating a Kerberos context with an encryption
type that is not supported by the kernel code.  (This can happen due to
mis-configuration or a bug in the Kerberos code that does not honor our
request to limit the encryption types negotiated.)  This failure is not
transient, and returning EAGAIN causes mount to continuously retry rather
than giving up.
Signed-off-by: NKevin Coffman <kwc@citi.umich.edu>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      ffc40f56
    • T
      NFS: Fix the ustat() regression · b09b9417
      由 Trond Myklebust 提交于 
      Since 2.6.18, the superblock sb->s_root has been a dummy dentry with a
dummy inode. This breaks ustat(), which actually uses sb->s_root in a
vfstat() call.

Fix this by making the s_root a dummy alias to the directory inode that was
used when creating the superblock.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      b09b9417
    • L
      Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86 · 2ffbb837
      由 Linus Torvalds 提交于 
      * 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86:
  x86: simplify "make ARCH=x86" and fix kconfig all.config
  x86: reboot fixup for wrap2c board
  x86: check boundary in count setup resource
  x86: fix reboot with no keyboard attached
  x86: add hpet sanity checks
  x86: on x86_64, correct reading of PC RTC when update in progress in time_64.c
  x86: fix freeze in x86_64 RTC update code in time_64.c
  ntp: fix typo that makes sync_cmos_clock erratic
  Remove x86 merge artifact from top Makefile
  x86: fixup cpu_info array conversion
  x86: show cpuinfo only for online CPUs
  x86: fix cpu-hotplug regression
  x86: ignore the sys_getcpu() tcache parameter
  x86: voyager use correct header file name
  x86: fix smp init sections
  x86: fix voyager_cat_init section
  x86: fix bogus memcpy in es7000_check_dsdt()
      2ffbb837
    • S
      x86: simplify "make ARCH=x86" and fix kconfig all.config · 6840999b
      由 Sam Ravnborg 提交于 
      Simplify "make ARCH=x86" and fix kconfig so we again can set 64BIT in
all.config.

For a fix the diffstat is nice:
 6 files changed, 3 insertions(+), 36 deletions(-)

The patch reverts these commits:
 - 0f855aa6 ("kconfig: add helper to set
   config symbol from environment variable")
 - 2a113281 ("kconfig: use $K64BIT to
   set 64BIT with all*config targets")

Roman Zippel pointed out that kconfig supported string compares so
the additional complexity introduced by the above two patches were
not needed.

With this patch we have following behaviour:

  # make {allno,allyes,allmod,rand}config [ARCH=...]
  option \ host arch      | 32bit         | 64bit
  =====================================================
  ./.                     | 32bit         | 64bit
  ARCH=x86                | 32bit         | 32bit
  ARCH=i386               | 32bit         | 32bit
  ARCH=x86_64             | 64bit         | 64bit

The general rule are that ARCH= and native architecture takes
precedence over the configuration.

So make ARCH=i386 [whatever] will always build a 32-bit kernel
no matter what the configuration says.  The configuration will
be updated to 32-bit if it was configured to 64-bit and the
other way around.

This behaviour is consistent with previous behaviour so no
suprises here.

make ARCH=x86 will per default result in a 32-bit kernel but as
the only ARCH= value x86 allow the user to select between 32-bit
and 64-bit using menuconfig.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Andreas Herrmann <aherrman@arcor.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      6840999b
    • S
      x86: simplify "make ARCH=x86" and fix kconfig all.config · 80ef88d6
      由 Sam Ravnborg 提交于 
      Simplify "make ARCH=x86" and fix kconfig so we again
can set 64BIT in all.config.

For a fix the diffstat is nice:
 6 files changed, 3 insertions(+), 36 deletions(-)

The patch reverts these commits:
0f855aa6
-> kconfig: add helper to set config symbol from environment variable

2a113281
-> kconfig: use $K64BIT to set 64BIT with all*config targets

Roman Zippel pointed out that kconfig supported string
compares so the additional complexity introduced by the
above two patches were not needed.

With this patch we have following behaviour:

# make {allno,allyes,allmod,rand}config [ARCH=...]
option \ host arch      | 32bit         | 64bit
=====================================================
./.                     | 32bit         | 64bit
ARCH=x86                | 32bit         | 32bit
ARCH=i386               | 32bit         | 32bit
ARCH=x86_64             | 64bit         | 64bit

The general rule are that ARCH= and native architecture
takes precedence over the configuration.
So make ARCH=i386 [whatever] will always build a 32-bit
kernel no matter what the configuration says.
The configuration will be updated to 32-bit if it was
configured to 64-bit and the other way around.

This behaviour is consistent with previous behaviour so
no suprises here.

make ARCH=x86 will per default result in a 32-bit kernel
but as the only ARCH= value x86 allow the user to select
between 32-bit and 64-bit using menuconfig. 
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Andreas Herrmann <aherrman@arcor.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
      80ef88d6
  5. 17 11月, 2007 22 次提交
  7. 16 11月, 2007 3 次提交
    • L
      dirty page balancing: Get rid of broken unmapped_ratio logic · 8c086340
      由 Linus Torvalds 提交于 
      This code harks back to the days when we didn't count dirty mapped
pages, which led us to try to balance the number of dirty unmapped pages
by how much unmapped memory there was in the system.

That makes no sense any more, since now the dirty counts include the
mapped pages.  Not to mention that the math doesn't work with HIGHMEM
machines anyway, and causes the unmapped_ratio to potentially turn
negative (which we do catch thanks to clamping it at a minimum value,
but I mention that as an indication of how broken the code is).

The code also was written at a time when the default dirty ratio was
much larger, and the unmapped_ratio logic effectively capped that large
dirty ratio a bit.  Again, we've since lowered the dirty ratio rather
aggressively, further lessening the point of that code.
Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      8c086340
    • L
      Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 · adea27f4
      由 Linus Torvalds 提交于 
      * 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6:
  [NETFILTER]: Fix NULL pointer dereference in nf_nat_move_storage()
  [SUNHME]: VLAN support for sunhme
  [CHELSIO]: Fix skb->dev setting.
  [NETFILTER]: fix compat_nf_sockopt typo
  [INET]: Fix potential kfree on vmalloc-ed area of request_sock_queue
  [VIA_VELOCITY]: Don't oops on MTU change.
  iwl4965: fix not correctly dealing with hotunplug
  rt2x00: Fix chipset revision validation
  iwl3945: place CCK rates in front of OFDM for supported rates
  mac80211: Fix queuing of scan containing a SSID
      adea27f4
    • L
      Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus · 40787d00
      由 Linus Torvalds 提交于 
      * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] N32 needs to use the compat version of sys_nfsservctl.
  [MIPS] irq_cpu: use handle_percpu_irq handler to avoid dropping interrupts.
  [MIPS] Sibyte: Fix name of clocksource.
  [MIPS] SNI: s/achknowledge/acknowledge/
  [MIPS] Makefile: Fix canonical system names
  [MIPS] vpe: handle halting TCs in an errata safe way.
  [MIPS] Sibyte: Stop timers before programming next even.
  [MIPS] Sibyte: Increase minimum oneshot timer interval to two ticks.
  [MIPS] Lasat: Fix overlap of interrupt number ranges.
  [MIPS] SNI PCIT CPLUS: workaround for b0rked irq wiring of onboard PCI bus 1
  [MIPS] Fix shadow register support.
  [MIPS] Change get_cycles to always return 0.
  [MIPS] Fix typo in R3000 TRACE_IRQFLAGS code
  [MIPS] Sibyte: Replace use of removed IO_SPACE_BASE with IOADDR.
  [MIPS] iounmap if in vr41xx_pciu_init() pci clock is over 33MHz
  [MIPS] BCM1480: Remove duplicate acknowledge of timer interrupt.
  [MIPS] Sibyte: pin timer interrupt to their cores.
  [MIPS] Qemu: Add early printk, your friend in a cold night.
  [MIPS] Convert reference to mem_map to pfn_to_page().
  [MIPS] Sibyte: resurrect old cache hack.
      40787d00