linux-stable.git/fs/nfs/blocklayout, branch linux-3.6.y

pnfsblock: fix non-aligned DIO write

2012-10-31T17:10:32+00:00

commit 96c9eae638765c2bf2ca4f5a6325484f9bb69aa7 upstream.

For DIO writes, if it is not blocksize aligned, we need to do
internal serialization. It may slow down writers anyway. So we
just bail them out and resend to MDS.

Signed-off-by: Peng Tao 
Signed-off-by: Trond Myklebust 
Signed-off-by: Greg Kroah-Hartman

pnfsblock: fix non-aligned DIO read

2012-10-31T17:10:32+00:00

commit f742dc4a32587bff50b13dde9d8894b96851951a upstream.

For DIO read, if it is not sector aligned, we should reject it
and resend via MDS. Otherwise there might be data corruption.
Also teach bl_read_pagelist to handle partial page reads for DIO.

Signed-off-by: Peng Tao 
Signed-off-by: Trond Myklebust 
Signed-off-by: Greg Kroah-Hartman

pnfsblock: fix partial page buffer wirte

2012-10-21T16:32:37+00:00

commit fe6e1e8d9fad86873eb74a26e80a8f91f9e870b5 upstream.

If applications use flock to protect its write range, generic NFS
will not do read-modify-write cycle at page cache level. Therefore
LD should know how to handle non-sector aligned writes. Otherwise
there will be data corruption.

Signed-off-by: Peng Tao 
Signed-off-by: Trond Myklebust 
Signed-off-by: Greg Kroah-Hartman

pnfsblock: bail out partial page IO

2012-07-30T22:52:06+00:00

Current block layout driver read/write code assumes page
aligned IO in many places. Add a checker to validate the assumption.
Otherwise there would be data corruption like when application does
open(O_WRONLY) and page unaliged write.

Signed-off-by: Peng Tao 
Signed-off-by: Trond Myklebust

NFS: Use proper naming conventions for the nfs_client.net field

2012-05-22T20:45:44+00:00

Clean up:  When naming fields and data types, follow established
conventions to facilitate accurate grep/cscope searches.

Introduced by commit e50a7a1a "NFS: make NFS client allocated per
network namespace context," Tue Jan 10, 2012.

Signed-off-by: Chuck Lever 
Signed-off-by: Trond Myklebust

NFS: create struct nfs_page_array

2012-04-27T18:10:37+00:00

Both nfs_read_data and nfs_write_data devote several fields which
can be combined into a single shared struct.

Signed-off-by: Fred Isaman 
Signed-off-by: Trond Myklebust

NFS: create common nfs_pgio_header for both read and write

2012-04-27T18:10:37+00:00

In order to avoid duplicating all the data in nfs_read_data whenever we
split it up into multiple RPC calls (either due to a short read result
or due to rsize < PAGE_SIZE), we split out the bits that are the same
per RPC call into a separate "header" structure.

The goal this patch moves towards is to have a single header
refcounted by several rpc_data structures.  Thus, want to always refer
from rpc_data to the header, and not the other way.  This patch comes
close to that ideal, but the directio code currently needs some
special casing, isolated in the nfs_direct_[read_write]hdr_release()
functions.  This will be dealt with in a future patch.

Signed-off-by: Fred Isaman 
Signed-off-by: Trond Myklebust

fix page number calculation bug for block layout decode buffer

2012-04-26T16:23:23+00:00

Signed-off-by: Jim Rees 
Suggested-by: Andy Adamson 
Suggested-by: Fred Isaman 
Signed-off-by: Trond Myklebust

NFS: Fix more NFS debug related build warnings

2012-03-21T13:31:44+00:00

Signed-off-by: Trond Myklebust

NFS: null dereference in dev_remove()

2012-03-13T19:33:08+00:00

In commit 5ffaf85541 "NFS: replace global bl_wq with per-net one" we
made "msg" a pointer instead of a struct stored in stack memory.  But we
forgot to change the memset() here so we're still clearing stack memory
instead clearing the struct like we intended.  It will lead to a kernel
crash.

Signed-off-by: Dan Carpenter 
Signed-off-by: Trond Myklebust