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Commit 5043e900 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFS: Convert instances of kernel_thread() to kthread() 



 Convert private implementations in NFSv4 state recovery and delegation
 code to use kthreads.

 Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 433fbe4c

fs/nfs/nfs4state.c

+16 −30
Original line number Diff line number Diff line
@@ -43,6 +43,8 @@ 
#include <linux/smp_lock.h>

#include <linux/nfs_fs.h>

#include <linux/nfs_idmap.h>

#include <linux/kthread.h>

#include <linux/module.h>

#include <linux/workqueue.h>

#include <linux/bitops.h>
@@ -57,8 +59,6 @@ const nfs4_stateid zero_stateid; 
static DEFINE_SPINLOCK(state_spinlock);

static LIST_HEAD(nfs4_clientid_list);



static void nfs4_recover_state(void *);



void

init_nfsv4_state(struct nfs_server *server)

{
@@ -103,7 +103,6 @@ nfs4_alloc_client(struct in_addr *addr) 
	INIT_LIST_HEAD(&clp->cl_unused);

	spin_lock_init(&clp->cl_lock);

	atomic_set(&clp->cl_count, 1);

	INIT_WORK(&clp->cl_recoverd, nfs4_recover_state, clp);

	INIT_WORK(&clp->cl_renewd, nfs4_renew_state, clp);

	INIT_LIST_HEAD(&clp->cl_superblocks);

	rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS4 client");
@@ -734,10 +733,6 @@ int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) 
}



static int reclaimer(void *);

struct reclaimer_args {

	struct nfs4_client *clp;

	struct completion complete;

};



static inline void nfs4_clear_recover_bit(struct nfs4_client *clp)

{
@@ -751,35 +746,30 @@ static inline void nfs4_clear_recover_bit(struct nfs4_client *clp) 
/*

 * State recovery routine

 */

void

nfs4_recover_state(void *data)

static void nfs4_recover_state(struct nfs4_client *clp)

{

	struct nfs4_client *clp = (struct nfs4_client *)data;

	struct reclaimer_args args = {

		.clp = clp,

	};

	might_sleep();



	init_completion(&args.complete);

	struct task_struct *task;



	if (kernel_thread(reclaimer, &args, CLONE_KERNEL) < 0)

		goto out_failed_clear;

	wait_for_completion(&args.complete);

	__module_get(THIS_MODULE);

	atomic_inc(&clp->cl_count);

	task = kthread_run(reclaimer, clp, "%u.%u.%u.%u-reclaim",

			NIPQUAD(clp->cl_addr));

	if (!IS_ERR(task))

		return;

out_failed_clear:

	nfs4_clear_recover_bit(clp);

	nfs4_put_client(clp);

	module_put(THIS_MODULE);

}



/*

 * Schedule a state recovery attempt

 */

void

nfs4_schedule_state_recovery(struct nfs4_client *clp)

void nfs4_schedule_state_recovery(struct nfs4_client *clp)

{

	if (!clp)

		return;

	if (test_and_set_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)

		schedule_work(&clp->cl_recoverd);

		nfs4_recover_state(clp);

}



static int nfs4_reclaim_locks(struct nfs4_state_recovery_ops *ops, struct nfs4_state *state)
@@ -895,18 +885,13 @@ static void nfs4_state_mark_reclaim(struct nfs4_client *clp) 


static int reclaimer(void *ptr)

{

	struct reclaimer_args *args = (struct reclaimer_args *)ptr;

	struct nfs4_client *clp = args->clp;

	struct nfs4_client *clp = ptr;

	struct nfs4_state_owner *sp;

	struct nfs4_state_recovery_ops *ops;

	int status = 0;



	daemonize("%u.%u.%u.%u-reclaim", NIPQUAD(clp->cl_addr));

	allow_signal(SIGKILL);



	atomic_inc(&clp->cl_count);

	complete(&args->complete);



	/* Ensure exclusive access to NFSv4 state */

	lock_kernel();

	down_write(&clp->cl_sem);
@@ -954,6 +939,7 @@ static int reclaimer(void *ptr) 
		nfs_handle_cb_pathdown(clp);

	nfs4_clear_recover_bit(clp);

	nfs4_put_client(clp);

	module_put_and_exit(0);

	return 0;

out_error:

	printk(KERN_WARNING "Error: state recovery failed on NFSv4 server %u.%u.%u.%u with error %d\n",