mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-08-25 10:19:47 +00:00
Code Issues Releases Wiki Activity

NFSv4: Kill nfs4_async_handle_error() abuses by NFSv4.1

Browse source 
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2010-06-16 09:52:25 -04:00
parent d185a334c7
commit aa5190d0ed
1 changed files with 41 additions and 37 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

78
fs/nfs/nfs4proc.c
View file

@ -3457,9 +3457,11 @@ static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen
}
static int
_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
{
if (!clp || task->tk_status >= 0)
struct nfs_client *clp = server->nfs_client;
if (task->tk_status >= 0)
return 0;
switch(task->tk_status) {
case -NFS4ERR_ADMIN_REVOKED:
@ -3491,8 +3493,7 @@ _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
return -EAGAIN;
#endif /* CONFIG_NFS_V4_1 */
case -NFS4ERR_DELAY:
if (server)
nfs_inc_server_stats(server, NFSIOS_DELAY);
nfs_inc_server_stats(server, NFSIOS_DELAY);
case -NFS4ERR_GRACE:
case -EKEYEXPIRED:
rpc_delay(task, NFS4_POLL_RETRY_MAX);
@ -3513,12 +3514,6 @@ _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
return -EAGAIN;
}
static int
nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
{
return _nfs4_async_handle_error(task, server, server->nfs_client, state);
}
int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
unsigned short port, struct rpc_cred *cred,
struct nfs4_setclientid_res *res)
@ -5088,6 +5083,19 @@ static void nfs41_sequence_release(void *data)
kfree(calldata);
}
static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
{
switch(task->tk_status) {
case -NFS4ERR_DELAY:
case -EKEYEXPIRED:
rpc_delay(task, NFS4_POLL_RETRY_MAX);
return -EAGAIN;
default:
nfs4_schedule_state_recovery(clp);
}
return 0;
}
static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
{
struct nfs4_sequence_data *calldata = data;
@ -5100,9 +5108,8 @@ static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
if (atomic_read(&clp->cl_count) == 1)
goto out;
if (_nfs4_async_handle_error(task, NULL, clp, NULL)
== -EAGAIN) {
nfs_restart_rpc(task, clp);
if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
rpc_restart_call_prepare(task);
return;
}
}
@ -5175,6 +5182,23 @@ static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
rpc_call_start(task);
}
static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
{
switch(task->tk_status) {
case 0:
case -NFS4ERR_COMPLETE_ALREADY:
case -NFS4ERR_WRONG_CRED: /* What to do here? */
break;
case -NFS4ERR_DELAY:
case -EKEYEXPIRED:
rpc_delay(task, NFS4_POLL_RETRY_MAX);
return -EAGAIN;
default:
nfs4_schedule_state_recovery(clp);
}
return 0;
}
static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
{
struct nfs4_reclaim_complete_data *calldata = data;
@ -5183,31 +5207,11 @@ static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
dprintk("--> %s\n", __func__);
nfs41_sequence_done(res);
switch (task->tk_status) {
case 0:
case -NFS4ERR_COMPLETE_ALREADY:
break;
case -NFS4ERR_BADSESSION:
case -NFS4ERR_DEADSESSION:
/*
* Handle the session error, but do not retry the operation, as
* we have no way of telling whether the clientid had to be
* reset before we got our reply. If reset, a new wave of
* reclaim operations will follow, containing their own reclaim
* complete. We don't want our retry to get on the way of
* recovery by incorrectly indicating to the server that we're
* done reclaiming state since the process had to be restarted.
*/
_nfs4_async_handle_error(task, NULL, clp, NULL);
break;
default:
if (_nfs4_async_handle_error(
task, NULL, clp, NULL) == -EAGAIN) {
rpc_restart_call_prepare(task);
return;
}
}
if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
rpc_restart_call_prepare(task);
return;
}
dprintk("<-- %s\n", __func__);
}