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authorTrond Myklebust <trond.myklebust@primarydata.com>2016-07-05 13:46:53 -0400
committerTrond Myklebust <trond.myklebust@primarydata.com>2016-07-05 19:08:27 -0400
commitac46bd374c9a838874c450c528e2e922ee748ff9 (patch)
tree412f64704197188b32b3c31122ba9768e3ba1b21 /fs/nfs/inode.c
parent2e18d4d822ea9cc811ea26a880cf2ed47cbf8889 (diff)
downloadlinux-ac46bd374c9a838874c450c528e2e922ee748ff9.tar.bz2
pNFS: Ensure we layoutcommit before revalidating attributes
If we need to update the cached attributes, then we'd better make sure that we also layoutcommit first. Otherwise, the server may have stale attributes. Prior to this patch, the revalidation code tried to "fix" this problem by simply disabling attributes that would be affected by the layoutcommit. That approach breaks nfs_writeback_check_extend(), leading to a file size corruption. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/inode.c')
-rw-r--r--fs/nfs/inode.c23
1 files changed, 7 insertions, 16 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 4e65a5a8a01b..6c0618eb5d57 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -974,6 +974,13 @@ __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
if (NFS_STALE(inode))
goto out;
+ /* pNFS: Attributes aren't updated until we layoutcommit */
+ if (S_ISREG(inode->i_mode)) {
+ status = pnfs_sync_inode(inode, false);
+ if (status)
+ goto out;
+ }
+
status = -ENOMEM;
fattr = nfs_alloc_fattr();
if (fattr == NULL)
@@ -1493,28 +1500,12 @@ static int nfs_inode_attrs_need_update(const struct inode *inode, const struct n
((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
}
-/*
- * Don't trust the change_attribute, mtime, ctime or size if
- * a pnfs LAYOUTCOMMIT is outstanding
- */
-static void nfs_inode_attrs_handle_layoutcommit(struct inode *inode,
- struct nfs_fattr *fattr)
-{
- if (pnfs_layoutcommit_outstanding(inode))
- fattr->valid &= ~(NFS_ATTR_FATTR_CHANGE |
- NFS_ATTR_FATTR_MTIME |
- NFS_ATTR_FATTR_CTIME |
- NFS_ATTR_FATTR_SIZE);
-}
-
static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
{
int ret;
trace_nfs_refresh_inode_enter(inode);
- nfs_inode_attrs_handle_layoutcommit(inode, fattr);
-
if (nfs_inode_attrs_need_update(inode, fattr))
ret = nfs_update_inode(inode, fattr);
else