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Commit a6a852e9 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge git://git.linux-nfs.org/pub/linux/nfs-2.6 

* git://git.linux-nfs.org/pub/linux/nfs-2.6:
  SUNRPC xptrdma: simplify build configuration
  NFS: Fix a potential file corruption issue when writing
parents 099dc4fb 3211e4eb

fs/Kconfig

+2 −5
Original line number Diff line number Diff line
@@ -1778,12 +1778,9 @@ config SUNRPC_GSS 
	tristate



config SUNRPC_XPRT_RDMA

	tristate "RDMA transport for sunrpc (EXPERIMENTAL)"

	tristate

	depends on SUNRPC && INFINIBAND && EXPERIMENTAL

	default m

	help

	  Adds a client RPC transport for supporting kernel NFS over RDMA

	  mounts, including Infiniband and iWARP. Experimental.

	default SUNRPC && INFINIBAND



config SUNRPC_BIND34

	bool "Support for rpcbind versions 3 & 4 (EXPERIMENTAL)"

fs/nfs/write.c

+17 −3
Original line number Diff line number Diff line
@@ -696,6 +696,17 @@ int nfs_flush_incompatible(struct file *file, struct page *page) 
	return status;

}



/*

 * If the page cache is marked as unsafe or invalid, then we can't rely on

 * the PageUptodate() flag. In this case, we will need to turn off

 * write optimisations that depend on the page contents being correct.

 */

static int nfs_write_pageuptodate(struct page *page, struct inode *inode)

{

	return PageUptodate(page) &&

		!(NFS_I(inode)->cache_validity & (NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA));

}



/*

 * Update and possibly write a cached page of an NFS file.

 *
@@ -717,10 +728,13 @@ int nfs_updatepage(struct file *file, struct page *page, 
		(long long)(page_offset(page) +offset));



	/* If we're not using byte range locks, and we know the page

	 * is entirely in cache, it may be more efficient to avoid

	 * fragmenting write requests.

	 * is up to date, it may be more efficient to extend the write

	 * to cover the entire page in order to avoid fragmentation

	 * inefficiencies.

	 */

	if (PageUptodate(page) && inode->i_flock == NULL && !(file->f_mode & O_SYNC)) {

	if (nfs_write_pageuptodate(page, inode) &&

			inode->i_flock == NULL &&

			!(file->f_mode & O_SYNC)) {

		count = max(count + offset, nfs_page_length(page));

		offset = 0;

	}