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  1. 13 Aug, 2011 16 commits
  3. 08 Aug, 2011 1 commit
  5. 07 Aug, 2011 18 commits
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc · 9e233113
      Linus Torvalds authored 
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc: Fix build with DEBUG_PAGEALLOC enabled.
      9e233113
    • Rafael J. Wysocki's avatar
      sh: Fix boot crash related to SCI · fc97114b
      Rafael J. Wysocki authored 
      Commit d006199e72a9 ("serial: sh-sci: Regtype probing doesn't need to be
fatal.") made sci_init_single() return when sci_probe_regmap() succeeds,
although it should return when sci_probe_regmap() fails.  This causes
systems using the serial sh-sci driver to crash during boot.

Fix the problem by using the right return condition.
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      fc97114b
    • Linus Torvalds's avatar
      arm: remove stale export of 'sha_transform' · f23c126b
      Linus Torvalds authored 
      The generic library code already exports the generic function, this was
left-over from the ARM-specific version that just got removed.
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      f23c126b
    • Linus Torvalds's avatar
      arm: remove "optimized" SHA1 routines · 4d448714
      Linus Torvalds authored 
      Since commit 1eb19a12 ("lib/sha1: use the git implementation of
SHA-1"), the ARM SHA1 routines no longer work.  The reason? They
depended on the larger 320-byte workspace, and now the sha1 workspace is
just 16 words (64 bytes).  So the assembly version would overwrite the
stack randomly.

The optimized asm version is also probably slower than the new improved
C version, so there's no reason to keep it around.  At least that was
the case in git, where what appears to be the same assembly language
version was removed two years ago because the optimized C BLK_SHA1 code
was faster.
Reported-and-tested-by: default avatarJoachim Eastwood <manabian@gmail.com>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Cc: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      4d448714
    • Al Viro's avatar
      fix rcu annotations noise in cred.h · 32955148
      Al Viro authored 
      task->cred is declared as __rcu, and access to other tasks' ->cred is,
indeed, protected.  Access to current->cred does not need rcu_dereference()
at all, since only the task itself can change its ->cred.  sparse, of
course, has no way of knowing that...

Add force-cast in current_cred(), make current_fsuid() et.al. use it.
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      32955148
    • Linus Torvalds's avatar
      vfs: rename 'do_follow_link' to 'should_follow_link' · 7813b94a
      Linus Torvalds authored 
      Al points out that the do_follow_link() helper function really is
misnamed - it's about whether we should try to follow a symlink or not,
not about actually doing the following.
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      7813b94a
    • Ari Savolainen's avatar
      Fix POSIX ACL permission check · 206b1d09
      Ari Savolainen authored 
      After commit 3567866b: "RCUify freeing acls, let check_acl() go ahead in
RCU mode if acl is cached" posix_acl_permission is being called with an
unsupported flag and the permission check fails. This patch fixes the issue.
Signed-off-by: default avatarAri Savolainen <ari.m.savolainen@gmail.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      206b1d09
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd · c2f340a6
      Linus Torvalds authored 
      * 'for-linus' of git://git.open-osd.org/linux-open-osd:
  ore: Make ore its own module
  exofs: Rename raid engine from exofs/ios.c => ore
  exofs: ios: Move to a per inode components & device-table
  exofs: Move exofs specific osd operations out of ios.c
  exofs: Add offset/length to exofs_get_io_state
  exofs: Fix truncate for the raid-groups case
  exofs: Small cleanup of exofs_fill_super
  exofs: BUG: Avoid sbi realloc
  exofs: Remove pnfs-osd private definitions
  nfs_xdr: Move nfs4_string definition out of #ifdef CONFIG_NFS_V4
      c2f340a6
    • Linus Torvalds's avatar
      vfs: optimize inode cache access patterns · 3ddcd056
      Linus Torvalds authored 
      The inode structure layout is largely random, and some of the vfs paths
really do care.  The path lookup in particular is already quite D$
intensive, and profiles show that accessing the 'inode->i_op->xyz'
fields is quite costly.

We already optimized the dcache to not unnecessarily load the d_op
structure for members that are often NULL using the DCACHE_OP_xyz bits
in dentry->d_flags, and this does something very similar for the inode
ops that are used during pathname lookup.

It also re-orders the fields so that the fields accessed by 'stat' are
together at the beginning of the inode structure, and roughly in the
order accessed.

The effect of this seems to be in the 1-2% range for an empty kernel
"make -j" run (which is fairly kernel-intensive, mostly in filename
lookup), so it's visible.  The numbers are fairly noisy, though, and
likely depend a lot on exact microarchitecture.  So there's more tuning
to be done.
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      3ddcd056
    • Linus Torvalds's avatar
      vfs: renumber DCACHE_xyz flags, remove some stale ones · 830c0f0e
      Linus Torvalds authored 
      Gcc tends to generate better code with small integers, including the
DCACHE_xyz flag tests - so move the common ones to be first in the list.
Also just remove the unused DCACHE_INOTIFY_PARENT_WATCHED and
DCACHE_AUTOFS_PENDING values, their users no longer exists in the source
tree.

And add a "unlikely()" to the DCACHE_OP_COMPARE test, since we want the
common case to be a nice straight-line fall-through.
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      830c0f0e
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 7cd4767e
      Linus Torvalds authored 
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  net: Compute protocol sequence numbers and fragment IDs using MD5.
  crypto: Move md5_transform to lib/md5.c
      7cd4767e
    • Boaz Harrosh's avatar
      ore: Make ore its own module · cf283ade
      Boaz Harrosh authored 
      Export everything from ore need exporting. Change Kbuild and Kconfig
to build ore.ko as an independent module. Import ore from exofs
Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
      cf283ade
    • Boaz Harrosh's avatar
      exofs: Rename raid engine from exofs/ios.c => ore · 8ff660ab
      Boaz Harrosh authored 
      ORE stands for "Objects Raid Engine"

This patch is a mechanical rename of everything that was in ios.c
and its API declaration to an ore.c and an osd_ore.h header. The ore
engine will later be used by the pnfs objects layout driver.

* File ios.c => ore.c

* Declaration of types and API are moved from exofs.h to a new
  osd_ore.h

* All used types are prefixed by ore_ from their exofs_ name.

* Shift includes from exofs.h to osd_ore.h so osd_ore.h is
  independent, include it from exofs.h.

Other than a pure rename there are no other changes. Next patch
will move the ore into it's own module and will export the API
to be used by exofs and later the layout driver
Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
      8ff660ab
    • Boaz Harrosh's avatar
      exofs: ios: Move to a per inode components & device-table · 9e9db456
      Boaz Harrosh authored 
      Exofs raid engine was saving on memory space by having a single layout-info,
single pid, and a single device-table, global to the filesystem. Then passing
a credential and object_id info at the io_state level, private for each
inode. It would also devise this contraption of rotating the device table
view for each inode->ino to spread out the device usage.

This is not compatible with the pnfs-objects standard, demanding that
each inode can have it's own layout-info, device-table, and each object
component it's own pid, oid and creds.

So: Bring exofs raid engine to be usable for generic pnfs-objects use by:

* Define an exofs_comp structure that holds obj_id and credential info.

* Break up exofs_layout struct to an exofs_components structure that holds a
  possible array of exofs_comp and the array of devices + the size of the
  arrays.

* Add a "comps" parameter to get_io_state() that specifies the ids creds
  and device array to use for each IO.

  This enables to keep the layout global, but the device-table view, creds
  and IDs at the inode level. It only adds two 64bit to each inode, since
  some of these members already existed in another form.

* ios raid engine now access layout-info and comps-info through the passed
  pointers. Everything is pre-prepared by caller for generic access of
  these structures and arrays.

At the exofs Level:

* Super block holds an exofs_components struct that holds the device
  array, previously in layout. The devices there are in device-table
  order. The device-array is twice bigger and repeats the device-table
  twice so now each inode's device array can point to a random device
  and have a round-robin view of the table, making it compatible to
  previous exofs versions.

* Each inode has an exofs_components struct that is initialized at
  load time, with it's own view of the device table IDs and creds.
  When doing IO this gets passed to the io_state together with the
  layout.

While preforming this change. Bugs where found where credentials with the
wrong IDs where used to access the different SB objects (super.c). As well
as some dead code. It was never noticed because the target we use does not
check the credentials.
Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
      9e9db456
    • Boaz Harrosh's avatar
      exofs: Move exofs specific osd operations out of ios.c · 85e44df4
      Boaz Harrosh authored 
      ios.c will be moving to an external library, for use by the
objects-layout-driver. Remove from it some exofs specific functions.

Also g_attr_logical_length is used both by inode.c and ios.c
move definition to the later, to keep it independent
Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
      85e44df4
    • Boaz Harrosh's avatar
      exofs: Add offset/length to exofs_get_io_state · e1042ba0
      Boaz Harrosh authored 
      In future raid code we will need to know the IO offset/length
and if it's a read or write to determine some of the array
sizes we'll need.

So add a new exofs_get_rw_state() API for use when
writeing/reading. All other simple cases are left using the
old way.

The major change to this is that now we need to call
exofs_get_io_state later at inode.c::read_exec and
inode.c::write_exec when we actually know these things. So this
patch is kept separate so I can test things apart from other
changes.
Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
      e1042ba0
    • David S. Miller's avatar
      net: Compute protocol sequence numbers and fragment IDs using MD5. · 6e5714ea
      David S. Miller authored 
      Computers have become a lot faster since we compromised on the
partial MD4 hash which we use currently for performance reasons.

MD5 is a much safer choice, and is inline with both RFC1948 and
other ISS generators (OpenBSD, Solaris, etc.)

Furthermore, only having 24-bits of the sequence number be truly
unpredictable is a very serious limitation.  So the periodic
regeneration and 8-bit counter have been removed.  We compute and
use a full 32-bit sequence number.

For ipv6, DCCP was found to use a 32-bit truncated initial sequence
number (it needs 43-bits) and that is fixed here as well.
Reported-by: default avatarDan Kaminsky <dan@doxpara.com>
Tested-by: default avatarWilly Tarreau <w@1wt.eu>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6e5714ea
    • David S. Miller's avatar
      crypto: Move md5_transform to lib/md5.c · bc0b96b5
      David S. Miller authored 
      We are going to use this for TCP/IP sequence number and fragment ID
generation.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      bc0b96b5
  7. 06 Aug, 2011 5 commits
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