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[PATCH] NFS: Fix races in nfs_revalidate_mapping()

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Prevent the call to invalidate_inode_pages2() from racing with file writes
by taking the inode->i_mutex across the page cache flush and invalidate.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Trond Myklebust
2007-01-24 11:54:55 -08:00
committed by Linus Torvalds
parent bde8f00ce6
commit 717d44e849
4 changed files with 72 additions and 32 deletions
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4
fs/nfs/symlink.c
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@@ -50,7 +50,9 @@ static void *nfs_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct inode *inode = dentry->d_inode;
struct page *page;
void *err = ERR_PTR(nfs_revalidate_mapping(inode, inode->i_mapping));
void *err;
err = ERR_PTR(nfs_revalidate_mapping_nolock(inode, inode->i_mapping));
if (err)
goto read_failed;
page = read_cache_page(&inode->i_data, 0,