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NFSv4: Return the delegation if the server returns NFS4ERR_OPENMODE 

If a setattr() fails because of an NFS4ERR_OPENMODE error, it is
probably due to us holding a read delegation. Ensure that the
recovery routines return that delegation in this case.

Reported-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Trond Myklebust 2012-03-07 16:39:06 -05:00
parent cf470c3e00
commit 3114ea7a24
2 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
fs/nfs/nfs4_fs.h
View File

@ -182,6 +182,7 @@ struct nfs4_exception {
long timeout;
int retry;
struct nfs4_state *state;
struct inode *inode;
};
struct nfs4_state_recovery_ops {

13
fs/nfs/nfs4proc.c
View File

@ -262,18 +262,28 @@ static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struc
{
struct nfs_client *clp = server->nfs_client;
struct nfs4_state *state = exception->state;
struct inode *inode = exception->inode;
int ret = errorcode;
exception->retry = 0;
switch(errorcode) {
case 0:
return 0;
case -NFS4ERR_OPENMODE:
if (nfs_have_delegation(inode, FMODE_READ)) {
nfs_inode_return_delegation(inode);
exception->retry = 1;
return 0;
}
if (state == NULL)
break;
nfs4_schedule_stateid_recovery(server, state);
goto wait_on_recovery;
case -NFS4ERR_DELEG_REVOKED:
case -NFS4ERR_ADMIN_REVOKED:
case -NFS4ERR_BAD_STATEID:
if (state != NULL)
nfs_remove_bad_delegation(state->inode);
case -NFS4ERR_OPENMODE:
if (state == NULL)
break;
nfs4_schedule_stateid_recovery(server, state);
@ -1939,6 +1949,7 @@ static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
struct nfs_server *server = NFS_SERVER(inode);
struct nfs4_exception exception = {
.state = state,
.inode = inode,
};
int err;
do {