6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
[ Upstream commit f92214e4c312f6ea9d78650cc6291d200f17abb6 ]
If the call to nfs_delegation_grab_inode() fails, we will not have
dropped any locks that require us to rescan the list.
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/nfs/delegation.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index ead8a0e06abf..2ba4d221bf9d 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -627,6 +627,9 @@ static int nfs_server_return_marked_delegations(struct nfs_server *server,
prev = delegation;
continue;
}
+ inode = nfs_delegation_grab_inode(delegation);
+ if (inode == NULL)
+ continue;
if (prev) {
struct inode *tmp = nfs_delegation_grab_inode(prev);
@@ -637,12 +640,6 @@ static int nfs_server_return_marked_delegations(struct nfs_server *server,
}
}
- inode = nfs_delegation_grab_inode(delegation);
- if (inode == NULL) {
- rcu_read_unlock();
- iput(to_put);
- goto restart;
- }
delegation = nfs_start_delegation_return_locked(NFS_I(inode));
rcu_read_unlock();
@@ -1164,7 +1161,6 @@ static int nfs_server_reap_unclaimed_delegations(struct nfs_server *server,
struct inode *inode;
restart:
rcu_read_lock();
-restart_locked:
list_for_each_entry_rcu(delegation, &server->delegations, super_list) {
if (test_bit(NFS_DELEGATION_INODE_FREEING,
&delegation->flags) ||
@@ -1175,7 +1171,7 @@ static int nfs_server_reap_unclaimed_delegations(struct nfs_server *server,
continue;
inode = nfs_delegation_grab_inode(delegation);
if (inode == NULL)
- goto restart_locked;
+ continue;
delegation = nfs_start_delegation_return_locked(NFS_I(inode));
rcu_read_unlock();
if (delegation != NULL) {
@@ -1296,7 +1292,6 @@ static int nfs_server_reap_expired_delegations(struct nfs_server *server,
nfs4_stateid stateid;
restart:
rcu_read_lock();
-restart_locked:
list_for_each_entry_rcu(delegation, &server->delegations, super_list) {
if (test_bit(NFS_DELEGATION_INODE_FREEING,
&delegation->flags) ||
@@ -1307,7 +1302,7 @@ static int nfs_server_reap_expired_delegations(struct nfs_server *server,
continue;
inode = nfs_delegation_grab_inode(delegation);
if (inode == NULL)
- goto restart_locked;
+ continue;
spin_lock(&delegation->lock);
cred = get_cred_rcu(delegation->cred);
nfs4_stateid_copy(&stateid, &delegation->stateid);
--
2.43.0
