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

pnfsblock: fix non-aligned DIO write

2012-10-31T17:10:32Z

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

2012-10-31T17:10:32Z

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

2012-10-21T16:32:37Z

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

2012-07-30T22:52:06Z

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: create struct nfs_page_array

2012-04-27T18:10:37Z

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

2012-04-27T18:10:37Z

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

2012-04-26T16:23:23Z

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

2012-03-21T13:31:44Z

Signed-off-by: Trond Myklebust

NFS: replace global bl_wq with per-net one

2012-03-11T14:57:35Z

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: Stanislav Kinsbursky Signed-off-by: Trond Myklebust

NFS: remove RPC PipeFS mount point reference from blocklayout routines

2012-01-31T23:20:27Z

This is a cleanup patch. We don't need this reference anymore, because blocklayout pipes dentries now creates and destroys in per-net operations and on PipeFS mount/umount notification. Note that nfs4blocklayout_register_net() now returns 0 instead of -ENOENT in case of PipeFS superblock absence. This is ok, because blocklayout pipe dentry will be created on PipeFS mount event. Signed-off-by: Stanislav Kinsbursky Signed-off-by: Trond Myklebust