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NFSv4: Rename the state reclaimer thread

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It is really a more general purpose state management thread at this point.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2008-12-23 15:21:48 -05:00
parent 707fb4b324
commit e005e8041c
4 changed files with 32 additions and 25 deletions
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2
fs/nfs/delegation.c
View File

@ -360,7 +360,7 @@ static int nfs_do_expire_all_delegations(void *ptr)
allow_signal(SIGKILL);
if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) != 0)
if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0)
goto out;
if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0)
goto out;

2
fs/nfs/nfs4_fs.h
View File

@ -38,7 +38,7 @@ struct idmap;
((err) != NFSERR_NOFILEHANDLE))
enum nfs4_client_state {
NFS4CLNT_STATE_RECOVER = 0,
NFS4CLNT_MANAGER_RUNNING = 0,
NFS4CLNT_CHECK_LEASE,
NFS4CLNT_LEASE_EXPIRED,
NFS4CLNT_RECLAIM_REBOOT,

4
fs/nfs/nfs4proc.c
View File

@ -207,7 +207,7 @@ static int nfs4_wait_clnt_recover(struct nfs_client *clp)
might_sleep();
res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
nfs4_wait_bit_killable, TASK_KILLABLE);
return res;
}
@ -2861,7 +2861,7 @@ nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
case -NFS4ERR_EXPIRED:
rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
nfs4_schedule_state_recovery(clp);
if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
task->tk_status = 0;
return -EAGAIN;

49
fs/nfs/nfs4state.c
View File

@ -767,32 +767,34 @@ int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task)
return status;
}
static int reclaimer(void *);
static int nfs4_run_state_manager(void *);
static inline void nfs4_clear_recover_bit(struct nfs_client *clp)
static void nfs4_clear_state_manager_bit(struct nfs_client *clp)
{
smp_mb__before_clear_bit();
clear_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state);
clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state);
smp_mb__after_clear_bit();
wake_up_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER);
wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING);
rpc_wake_up(&clp->cl_rpcwaitq);
}
/*
* State recovery routine
* Schedule the nfs_client asynchronous state management routine
*/
static void nfs4_recover_state(struct nfs_client *clp)
static void nfs4_schedule_state_manager(struct nfs_client *clp)
{
struct task_struct *task;
if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0)
return;
__module_get(THIS_MODULE);
atomic_inc(&clp->cl_count);
task = kthread_run(reclaimer, clp, "%s-reclaim",
task = kthread_run(nfs4_run_state_manager, clp, "%s-manager",
rpc_peeraddr2str(clp->cl_rpcclient,
RPC_DISPLAY_ADDR));
if (!IS_ERR(task))
return;
nfs4_clear_recover_bit(clp);
nfs4_clear_state_manager_bit(clp);
nfs_put_client(clp);
module_put(THIS_MODULE);
}
@ -806,8 +808,7 @@ void nfs4_schedule_state_recovery(struct nfs_client *clp)
return;
if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state);
if (test_and_set_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
nfs4_recover_state(clp);
nfs4_schedule_state_manager(clp);
}
static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state)
@ -1106,13 +1107,10 @@ static int nfs4_reclaim_lease(struct nfs_client *clp)
return status;
}
static int reclaimer(void *ptr)
static void nfs4_state_manager(struct nfs_client *clp)
{
struct nfs_client *clp = ptr;
int status = 0;
allow_signal(SIGKILL);
/* Ensure exclusive access to NFSv4 state */
while (!list_empty(&clp->cl_superblocks)) {
if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) {
@ -1161,19 +1159,28 @@ static int reclaimer(void *ptr)
nfs_client_return_marked_delegations(clp);
continue;
}
nfs4_clear_state_manager_bit(clp);
break;
}
out:
nfs4_clear_recover_bit(clp);
nfs_put_client(clp);
module_put_and_exit(0);
return 0;
return;
out_error:
printk(KERN_WARNING "Error: state recovery failed on NFSv4 server %s"
printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s"
" with error %d\n", clp->cl_hostname, -status);
if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state))
nfs4_state_end_reclaim_reboot(clp);
goto out;
nfs4_clear_state_manager_bit(clp);
}
static int nfs4_run_state_manager(void *ptr)
{
struct nfs_client *clp = ptr;
allow_signal(SIGKILL);
nfs4_state_manager(clp);
nfs_put_client(clp);
module_put_and_exit(0);
return 0;
}
/*