NFS: Don't let nfs_end_data_update() clobber attribute update information
Since we almost always call nfs_end_data_update() after we called
nfs_refresh_inode(), we now end up marking the inode metadata
as needing revalidation immediately after having updated it.
This patch rearranges things so that we mark the inode as needing
revalidation _before_ we call nfs_refresh_inode() on those operations
that need it.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index b7d4f8f..6b3156e 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1236,13 +1236,12 @@
struct nfs_inode *nfsi = NFS_I(inode);
if (!nfs_have_delegation(inode, FMODE_READ)) {
- /* Mark the attribute cache for revalidation */
- spin_lock(&inode->i_lock);
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
- /* Directories and symlinks: invalidate page cache too */
- if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
+ /* Directories and symlinks: invalidate page cache */
+ if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) {
+ spin_lock(&inode->i_lock);
nfsi->cache_validity |= NFS_INO_INVALID_DATA;
- spin_unlock(&inode->i_lock);
+ spin_unlock(&inode->i_lock);
+ }
}
nfsi->cache_change_attribute = jiffies;
atomic_dec(&nfsi->data_updates);
@@ -1360,6 +1359,33 @@
return status;
}
+/**
+ * nfs_post_op_update_inode - try to update the inode attribute cache
+ * @inode - pointer to inode
+ * @fattr - updated attributes
+ *
+ * After an operation that has changed the inode metadata, mark the
+ * attribute cache as being invalid, then try to update it.
+ */
+int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
+{
+ struct nfs_inode *nfsi = NFS_I(inode);
+ int status = 0;
+
+ spin_lock(&inode->i_lock);
+ if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) {
+ nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS;
+ goto out;
+ }
+ status = nfs_update_inode(inode, fattr, fattr->time_start);
+ if (time_after_eq(fattr->time_start, nfsi->cache_change_attribute))
+ nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE);
+ nfsi->cache_change_attribute = jiffies;
+out:
+ spin_unlock(&inode->i_lock);
+ return status;
+}
+
/*
* Many nfs protocol calls return the new file attributes after
* an operation. Here we update the inode to reflect the state
