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  1. 26 Mar, 2012 2 commits
    • Jeff Layton's avatar
      nfsd: convert nfs4_client->cl_cb_flags to a generic flags field · a52d726b
      Jeff Layton authored 
      We'll need a way to flag the nfs4_client as already being recorded on
stable storage so that we don't continually upcall. Currently, that's
recorded in the cl_firststate field of the client struct. Using an
entire u32 to store a flag is rather wasteful though.

The cl_cb_flags field is only using 2 bits right now, so repurpose that
to a generic flags field. Rename NFSD4_CLIENT_KILL to
NFSD4_CLIENT_CB_KILL to make it evident that it's part of the callback
flags. Add a mask that we can use for existing checks that look to see
whether any flags are set, so that the new flags don't interfere.

Convert all references to cl_firstate to the NFSD4_CLIENT_STABLE flag,
and add a new NFSD4_CLIENT_RECLAIM_COMPLETE flag.
Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
      a52d726b
    • J. Bruce Fields's avatar
      Merge nfs containerization work from Trond's tree · 1df00640
      J. Bruce Fields authored 
      The nfs containerization work is a prerequisite for Jeff Layton's reboot
recovery rework.
      1df00640
  3. 21 Mar, 2012 12 commits
  5. 20 Mar, 2012 6 commits
  7. 19 Mar, 2012 5 commits
  9. 17 Mar, 2012 3 commits
    • Sachin Prabhu's avatar
      Try using machine credentials for RENEW calls · e49a29bd
      Sachin Prabhu authored 
      Using user credentials for RENEW calls will fail when the user
credentials have expired.

To avoid this, try using the machine credentials when making RENEW
calls. If no machine credentials have been set, fall back to using user
credentials as before.
Signed-off-by: default avatarSachin Prabhu <sprabhu@redhat.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
      e49a29bd
    • Trond Myklebust's avatar
      NFSv4.1: Fix a few issues in filelayout_commit_pagelist · 9390f425
      Trond Myklebust authored 
      - Fix a race in which NFS_I(inode)->commits_outstanding could potentially
  go to zero (triggering a call to nfs_commit_clear_lock()) before we're
  done sending out all the commit RPC calls.

- If nfs_commitdata_alloc fails, there is no reason why we shouldn't
  try to send off all the commits-to-ds.

- Simplify the error handling.

- Change pnfs_commit_list() to always return either
  PNFS_ATTEMPTED or PNFS_NOT_ATTEMPTED.
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
      9390f425
    • Trond Myklebust's avatar
      NFSv4.1: Clean ups and bugfixes for the pNFS read/writeback/commit code · 8dd37758
      Trond Myklebust authored 
      Move more pnfs-isms out of the generic commit code.

Bugfixes:

- filelayout_scan_commit_lists doesn't need to get/put the lseg.
  In fact since it is run under the inode->i_lock, the lseg_put()
  can deadlock.

- Ensure that we distinguish between what needs to be done for
  commit-to-data server and what needs to be done for commit-to-MDS
  using the new flag PG_COMMIT_TO_DS. Otherwise we may end up calling
  put_lseg() on a bucket for a struct nfs_page that got written
  through the MDS.

- Fix a case where we were using list_del() on an nfs_page->wb_list
  instead of list_del_init().

- filelayout_initiate_commit needs to call filelayout_commit_release
  on error instead of the mds_ops->rpc_release(). Otherwise it won't
  clear the commit lock.

Cleanups:

- Let the files layout manage the commit lists for the pNFS case.
  Don't expose stuff like pnfs_choose_commit_list, and the fact
  that the commit buckets hold references to the layout segment
  in common code.

- Cast out the put_lseg() calls for the struct nfs_read/write_data->lseg
  into the pNFS layer from whence they came.

- Let the pNFS layer manage the NFS_INO_PNFS_COMMIT bit.
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
Cc: Fred Isaman <iisaman@netapp.com>
      8dd37758
  11. 15 Mar, 2012 1 commit
  13. 14 Mar, 2012 3 commits
    • William Dauchy's avatar
      NFSv4: Rate limit the state manager for lock reclaim warning messages · 96dcadc2
      William Dauchy authored 
      Adding rate limit on `Lock reclaim failed` messages since it could fill
up system logs
Signed-off-by: default avatarWilliam Dauchy <wdauchy@gmail.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
      96dcadc2
    • Boaz Harrosh's avatar
      pnfs-obj: Uglify objio_segment allocation for the sake of the principle :-( · 5318a29c
      Boaz Harrosh authored 
      At some past instance Linus Trovalds wrote:
> From: Linus Torvalds <torvalds@linux-foundation.org>
> commit a84a79e4 upstream.
>
> The size is always valid, but variable-length arrays generate worse code
> for no good reason (unless the function happens to be inlined and the
> compiler sees the length for the simple constant it is).
>
> Also, there seems to be some code generation problem on POWER, where
> Henrik Bakken reports that register r28 can get corrupted under some
> subtle circumstances (interrupt happening at the wrong time?).  That all
> indicates some seriously broken compiler issues, but since variable
> length arrays are bad regardless, there's little point in trying to
> chase it down.
>
> "Just don't do that, then".

Since then any use of "variable length arrays" has become blasphemous.
Even in perfectly good, beautiful, perfectly safe code like the one
below where the variable length arrays are only used as a sizeof()
parameter, for type-safe dynamic structure allocations. GCC is not
executing any stack allocation code.

I have produced a small file which defines two functions main1(unsigned numdevs)
and main2(unsigned numdevs). main1 uses code as before with call to malloc
and main2 uses code as of after this patch. I compiled it as:
	gcc -O2 -S see_asm.c
and here is what I get:

<see_asm.s>
main1:
.LFB7:
	.cfi_startproc
	mov	%edi, %edi
	leaq	4(%rdi,%rdi), %rdi
	salq	$3, %rdi
	jmp	malloc
	.cfi_endproc
.LFE7:
	.size	main1, .-main1
	.p2align 4,,15
	.globl	main2
	.type	main2, @function
main2:
.LFB8:
	.cfi_startproc
	mov	%edi, %edi
	addq	$2, %rdi
	salq	$4, %rdi
	jmp	malloc
	.cfi_endproc
.LFE8:
	.size	main2, .-main2
	.section	.text.startup,"ax",@progbits
	.p2align 4,,15
</see_asm.s>

*Exact* same code !!!

So please seriously consider not accepting this patch and leave the
perfectly good code intact.

CC: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
      5318a29c
    • Bernd Schubert's avatar
      fs: add new FMODE flags: FMODE_32bithash and FMODE_64bithash · 6a8a13e0
      Bernd Schubert authored 
      Those flags are supposed to be set by NFS readdir() to tell ext3/ext4
to 32bit (NFSv2) or 64bit hash values (offsets) in seekdir().
Signed-off-by: default avatarBernd Schubert <bernd.schubert@itwm.fraunhofer.de>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
      6a8a13e0
  15. 13 Mar, 2012 1 commit
  17. 12 Mar, 2012 4 commits
  19. 11 Mar, 2012 3 commits
    • Trond Myklebust's avatar
      SUNRPC: Fix a few sparse warnings · 09acfea5
      Trond Myklebust authored 
      net/sunrpc/svcsock.c:412:22: warning: incorrect type in assignment
(different address spaces)
 - svc_partial_recvfrom now takes a struct kvec, so the variable
   save_iovbase needs to be an ordinary (void *)

Make a bunch of variables in net/sunrpc/xprtsock.c static

Fix a couple of "warning: symbol 'foo' was not declared. Should it be
static?" reports.

Fix a couple of conflicting function declarations.
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
      09acfea5
    • Trond Myklebust's avatar
      NFS: Fix a number of sparse warnings · 17280175
      Trond Myklebust authored 
      Fix a number of "warning: symbol 'foo' was not declared. Should it be
static?" conditions.

Fix 2 cases of "warning: Using plain integer as NULL pointer"

fs/nfs/delegation.c:263:31: warning: restricted fmode_t degrades to integer
  - We want to allow upgrades to a WRITE delegation, but should otherwise
    consider servers that hand out duplicate delegations to be borken.
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
      17280175
    • Stanislav Kinsbursky's avatar
      NFS: replace global bl_wq with per-net one · 5ffaf855
      Stanislav Kinsbursky authored 
      This queue is used for sleeping in kernel and it have to be per-net since we
don't want to wake any other waiters except in out network nemespace.
BTW, move wq to per-net data is easy. But some way to handle upcall timeouts
have to be provided. On message destroy in case of timeout, tasks, waiting for
message to be delivered, should be awakened. Thus, some data required to
located the right wait queue. Chosen solution replaces rpc_pipe_msg object with
new introduced bl_pipe_msg object, containing rpc_pipe_msg and proper wq.
Signed-off-by: default avatarStanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
      5ffaf855
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