Revision dac876193cd79ced36d0462749ea47c05844fb49 authored by Terry Loftin on 09 April 2010, 10:29:49 UTC, committed by David S. Miller on 13 April 2010, 10:03:13 UTC
Tx ring buffers after tx_ring->next_to_use are volatile and could change, possibly causing a crash. Stop cleaning when we hit tx_ring->next_to_use. Signed-off-by: Terry Loftin <terry.loftin@hp.com> Acked-by: Bruce Allan <bruce.w.allan@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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lockd.c
/*
* This file contains all the stubs needed when communicating with lockd.
* This level of indirection is necessary so we can run nfsd+lockd without
* requiring the nfs client to be compiled in/loaded, and vice versa.
*
* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
*/
#include <linux/file.h>
#include <linux/lockd/bind.h>
#include "nfsd.h"
#include "vfs.h"
#define NFSDDBG_FACILITY NFSDDBG_LOCKD
#ifdef CONFIG_LOCKD_V4
#define nlm_stale_fh nlm4_stale_fh
#define nlm_failed nlm4_failed
#else
#define nlm_stale_fh nlm_lck_denied_nolocks
#define nlm_failed nlm_lck_denied_nolocks
#endif
/*
* Note: we hold the dentry use count while the file is open.
*/
static __be32
nlm_fopen(struct svc_rqst *rqstp, struct nfs_fh *f, struct file **filp)
{
__be32 nfserr;
struct svc_fh fh;
/* must initialize before using! but maxsize doesn't matter */
fh_init(&fh,0);
fh.fh_handle.fh_size = f->size;
memcpy((char*)&fh.fh_handle.fh_base, f->data, f->size);
fh.fh_export = NULL;
exp_readlock();
nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp);
fh_put(&fh);
rqstp->rq_client = NULL;
exp_readunlock();
/* We return nlm error codes as nlm doesn't know
* about nfsd, but nfsd does know about nlm..
*/
switch (nfserr) {
case nfs_ok:
return 0;
case nfserr_dropit:
return nlm_drop_reply;
case nfserr_stale:
return nlm_stale_fh;
default:
return nlm_failed;
}
}
static void
nlm_fclose(struct file *filp)
{
fput(filp);
}
static struct nlmsvc_binding nfsd_nlm_ops = {
.fopen = nlm_fopen, /* open file for locking */
.fclose = nlm_fclose, /* close file */
};
void
nfsd_lockd_init(void)
{
dprintk("nfsd: initializing lockd\n");
nlmsvc_ops = &nfsd_nlm_ops;
}
void
nfsd_lockd_shutdown(void)
{
nlmsvc_ops = NULL;
}
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