Signed-off-by: NSage Weil <sage@newdream.net>

Implement flock inode operation to support advisory file locking.  All
lock/unlock operations are synchronous with the MDS.  Lock state is
sent when reconnecting to a recovering MDS to restore the shared lock
state.
Signed-off-by: NGreg Farnum <gregf@hq.newdream.net>
Signed-off-by: NSage Weil <sage@newdream.net>

Define the MDS operations and data types for doing file advisory locking
with the MDS.
Signed-off-by: NGreg Farnum <gregf@hq.newdream.net>
Signed-off-by: NSage Weil <sage@newdream.net>

This informs the server that we will accept v2 client_caps format and v2
client_reconnect format messages.
Signed-off-by: NGreg Farnum <gregf@hq.newdream.net>
Signed-off-by: NSage Weil <sage@newdream.net>

Encode either old or v2 encoding of client_reconnect message, depending on
whether the peer has the FLOCK feature bit.
Signed-off-by: NSage Weil <sage@newdream.net>

Add support for v2 encoding of MClientCaps, which includes a flock blob.
Signed-off-by: NSage Weil <sage@newdream.net>

Signed-off-by: NSage Weil <sage@newdream.net>

The pool info contains a vector for snap_info_t, not snap ids.  This fixes
the broken decoding, which would declare teh update corrupt when a pool
snapshot was created.
Signed-off-by: NSage Weil <sage@newdream.net>

The ->sync_fs() super op only needs to wait if wait is true.  Otherwise,
just get some dirty cap writeback started.
Signed-off-by: NSage Weil <sage@newdream.net>

Well, this Shouldn't Happen, so it would be helpful to know the caller when
it does.
Signed-off-by: NSage Weil <sage@newdream.net>

Include the crush_ruleset in the error message.
Signed-off-by: NSage Weil <sage@newdream.net>

Signed-off-by: NSage Weil <sage@newdream.net>

Define ROLLBACK op, IFLOCK inode lock (for advisory file locking).
Signed-off-by: NSage Weil <sage@newdream.net>

Signed-off-by: NSage Weil <sage@newdream.net>

Signed-off-by: NSage Weil <sage@newdream.net>

Specify the supported/required feature bits in super.h client code instead
of using the definitions from the shared kernel/userspace headers (which
will go away shortly).
Signed-off-by: NSage Weil <sage@newdream.net>

Specify the fsid mount option in hex, not via the major/minor u64 hackery we had
before.
Signed-off-by: NSage Weil <sage@newdream.net>

Signed-off-by: NSage Weil <sage@newdream.net>

Signed-off-by: NGreg Farnum <gregf@hq.newdream.net>
Signed-off-by: NSage Weil <sage@newdream.net>

Signed-off-by: NGreg Farnum <gregf@hq.newdream.net>
Signed-off-by: NSage Weil <sage@newdream.net>

When we get a cap EXPORT message, make sure we are connected to all export
targets to ensure we can handle the matching IMPORT.
Signed-off-by: NSage Weil <sage@newdream.net>

If an MDS we are talking to may have failed, we need to open sessions to
its potential export targets to ensure that any in-progress migration that
may have involved some of our caps is properly handled.
Signed-off-by: NSage Weil <sage@newdream.net>

There are a few cases where we need to open sessions with a given mds's
potential export targets.
Signed-off-by: NSage Weil <sage@newdream.net>

Setting it elsewhere is unnecessary and more fragile.
Signed-off-by: NSage Weil <sage@newdream.net>

Caps related accounting is now being done per mds client instead
of just being global. This prepares ground work for a later revision
of the caps preallocated reservation list.
Signed-off-by: NYehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: NSage Weil <sage@newdream.net>

Signed-off-by: NSage Weil <sage@newdream.net>

Mainly fixing minor issues reported by sparse.
Signed-off-by: NYehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: NSage Weil <sage@newdream.net>

If we have a capsnap but no auth cap (e.g. because it is migrating to
another mds), bail out and do nothing for now.  Do NOT remove the capsnap
from the flush list.
Signed-off-by: NSage Weil <sage@newdream.net>

The caps revocation should either initiate writeback, invalidateion, or
call check_caps to ack or do the dirty work.  The primary question is
whether we can get away with only checking the auth cap or whether all
caps need to be checked.

The old code was doing...something else.  At the very least, revocations
from non-auth MDSs could break by triggering the "check auth cap only"
case.
Signed-off-by: NSage Weil <sage@newdream.net>

No functional change, aside from more useful debug output.
Signed-off-by: NSage Weil <sage@newdream.net>

Signed-off-by: NSage Weil <sage@newdream.net>

If the file mode is marked as "lazy," perform cached/buffered reads when
the caps permit it.  Adjust the rdcache_gen and invalidation logic
accordingly so that we manage our cache based on the FILE_CACHE -or-
FILE_LAZYIO cap bits.
Signed-off-by: NSage Weil <sage@newdream.net>

If we have marked a file as "lazy" (using the ceph ioctl), perform buffered
writes when the MDS caps allow it.
Signed-off-by: NSage Weil <sage@newdream.net>

Allow an application to mark a file descriptor for lazy file consistency
semantics, allowing buffered reads and writes when multiple clients are
accessing the same file.
Signed-off-by: NSage Weil <sage@newdream.net>

Also clean up the file flags -> file mode -> wanted caps functions while
we're at it.  This resyncs this file with userspace.
Signed-off-by: NSage Weil <sage@newdream.net>

nfs_commit_inode() needs to be defined irrespectively of whether or not
we are supporting NFSv3 and NFSv4.

Allow the compiler to optimise away code in the NFSv2-only case by
converting it into an inlined stub function.
Reported-and-tested-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* master.kernel.org:/home/rmk/linux-2.6-arm:
  cyber2000fb: fix console in truecolor modes
  cyber2000fb: fix machine hang on module load
  SA1111: Eliminate use after free
  ARM: Fix Versatile/Realview/VExpress MMC card detection sense
  ARM: 6279/1: highmem: fix SMP preemption bug in kmap_high_l1_vipt
  ARM: Add barriers to io{read,write}{8,16,32} accessors as well
  ARM: 6273/1: Add barriers to the I/O accessors if ARM_DMA_MEM_BUFFERABLE
  ARM: 6272/1: Convert L2x0 to use the IO relaxed operations
  ARM: 6271/1: Introduce *_relaxed() I/O accessors
  ARM: 6275/1: ux500: don't use writeb() in uncompress.h
  ARM: 6270/1: clean files in arch/arm/boot/compressed/
  ARM: Fix csum_partial_copy_from_user()

* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6:
  NFS: Ensure that writepage respects the nonblock flag
  NFS: kswapd must not block in nfs_release_page
  nfs: include space for the NUL in root path

* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  drm/edid: Fix the HDTV hack sync adjustment
  drm/radeon/kms: fix radeon mid power profile reporting