linux-stable.git/fs/nfs/blocklayout/blocklayout.c, branch linux-4.2.y

NFSv4.1/pnfs: Separate out metadata and data consistency for pNFS

2015-03-27T16:39:38+00:00

The LAYOUTCOMMIT operation means different things to different layout types.
For blocks and objects, it is both a data and metadata consistency operation.
For files and flexfiles, it is only a metadata consistency operation.

This patch separates out the 2 cases, allowing the files/flexfiles layout
drivers to optimise away the data consistency calls to layoutcommit.

Signed-off-by: Trond Myklebust

pnfs: release lseg in pnfs_generic_pg_cleanup

2015-02-03T19:06:44+00:00

This is needed to support mirrored writes - the first write can't just
trash the lseg, we need to keep it around until all mirrors have
written.

Signed-off-by: Weston Andros Adamson

pnfs/blocklayout: fix end calculation in pnfs_num_cont_bytes

2014-11-24T22:00:41+00:00

Use the number of pages in the pagecache mapping instead of the
number of pnfs requests which is only slightly related.

Reported-by: Weston Andros Adamson 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Trond Myklebust

nfs: Remove bogus assignment

2014-11-12T19:22:53+00:00

Commit 3a6fd1f004fc (pnfs/blocklayout: remove read-modify-write handling
in bl_write_pagelist) introduced a bogus assignment pg_index = pg_index
in variable initialization. AFAICS it's just a typo so remove it.
Spotted by Coverity (id 1248711).

CC: Christoph Hellwig 
Signed-off-by: Jan Kara 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Trond Myklebust

pNFS/blocklayout: Remove a couple of unused variables

2014-09-12T17:34:54+00:00

Cc: Christoph Hellwig 
Signed-off-by: Trond Myklebust

pnfs/blocklayout: in-kernel GETDEVICEINFO XDR parsing

2014-09-12T17:33:50+00:00

This patches moves parsing of the GETDEVICEINFO XDR to kernel space, as well
as the management of complex devices.  The reason for that is we might have
multiple outstanding complex devices after a NOTIFY_DEVICEID4_CHANGE, which
device mapper or md can't handle as they claim devices exclusively.

But as is turns out simple striping / concatenation is fairly trivial to
implement anyway, so we make our life simpler by reducing the reliance
on blkmapd.  For now we still use blkmapd by feeding it synthetic SIMPLE
device XDR to translate device signatures to device numbers, but in the
long runs I have plans to eliminate it entirely.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Trond Myklebust

pnfs/blocklayout: move all rpc_pipefs related code into a single file

2014-09-12T17:33:50+00:00

Create a file to house all the rpc_pipefs boilerplate code instead of
sprinkling it over a few files.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Trond Myklebust

pnfs/blocklayout: refactor extent processing

2014-09-12T17:33:49+00:00

Factor out a helper for all per-extent work, and merge the now trivial
functions for lseg allocation and parsing.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Trond Myklebust

pnfs/blocklayout: move extent processing to blocklayout.c

2014-09-12T17:33:49+00:00

This isn't device(id) related, so move it into the main file.  Simple move
for now, the next commit will clean it up a bit.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Trond Myklebust

pnfs/blocklayout: allocate separate pages for the layoutcommit payload

2014-09-12T17:22:45+00:00

Instead of overflowing the XDR send buffer with our extent list allocate
pages and pre-encode the layoutupdate payload into them.  We optimistically
allocate a single page use alloc_page and only switch to vmalloc when we
have more extents outstanding.  Currently there is only a single testcase
(xfstests generic/113) which can reproduce large enough extent lists for
this to occur.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Trond Myklebust