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Diffstat (limited to 'fs/nfs/delegation.c')
-rw-r--r--fs/nfs/delegation.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 89af1d269274..bd3a9601d32d 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -316,6 +316,10 @@ out:
* nfs_client_return_marked_delegations - return previously marked delegations
* @clp: nfs_client to process
*
+ * Note that this function is designed to be called by the state
+ * manager thread. For this reason, it cannot flush the dirty data,
+ * since that could deadlock in case of a state recovery error.
+ *
* Returns zero on success, or a negative errno value.
*/
int nfs_client_return_marked_delegations(struct nfs_client *clp)
@@ -340,11 +344,9 @@ restart:
server);
rcu_read_unlock();
- if (delegation != NULL) {
- filemap_flush(inode->i_mapping);
+ if (delegation != NULL)
err = __nfs_inode_return_delegation(inode,
delegation, 0);
- }
iput(inode);
if (!err)
goto restart;
@@ -380,6 +382,10 @@ void nfs_inode_return_delegation_noreclaim(struct inode *inode)
* nfs_inode_return_delegation - synchronously return a delegation
* @inode: inode to process
*
+ * This routine will always flush any dirty data to disk on the
+ * assumption that if we need to return the delegation, then
+ * we should stop caching.
+ *
* Returns zero on success, or a negative errno value.
*/
int nfs_inode_return_delegation(struct inode *inode)
@@ -389,10 +395,10 @@ int nfs_inode_return_delegation(struct inode *inode)
struct nfs_delegation *delegation;
int err = 0;
+ nfs_wb_all(inode);
if (rcu_access_pointer(nfsi->delegation) != NULL) {
delegation = nfs_detach_delegation(nfsi, server);
if (delegation != NULL) {
- nfs_wb_all(inode);
err = __nfs_inode_return_delegation(inode, delegation, 1);
}
}
@@ -538,6 +544,8 @@ int nfs_async_inode_return_delegation(struct inode *inode,
struct nfs_client *clp = server->nfs_client;
struct nfs_delegation *delegation;
+ filemap_flush(inode->i_mapping);
+
rcu_read_lock();
delegation = rcu_dereference(NFS_I(inode)->delegation);