On 2011-06-15 10:25, andros@xxxxxxxxxx wrote:
> From: Andy Adamson <andros@xxxxxxxxxx>
>
> Signed-off-by: Andy Adamson <andros@xxxxxxxxxx>
> cc:stable@xxxxxxxxxx [2.6.39]
> ---
> fs/nfs/inode.c | 2 ++
> fs/nfs/pnfs.h | 1 +
> fs/nfs/pnfs_dev.c | 14 +++++++++++++-
> 3 files changed, 16 insertions(+), 1 deletions(-)
>
> diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
> index 6f4850d..55ba1b0 100644
> --- a/fs/nfs/inode.c
> +++ b/fs/nfs/inode.c
> @@ -1595,6 +1595,8 @@ static int __init init_nfs_fs(void)
> if (err)
> goto out0;
>
> + nfs4_init_deviceid_cache();
> +
> #ifdef CONFIG_PROC_FS
> rpc_proc_register(&nfs_rpcstat);
> #endif
> diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
> index e46edac..67400bc 100644
> --- a/fs/nfs/pnfs.h
> +++ b/fs/nfs/pnfs.h
> @@ -212,6 +212,7 @@ void nfs4_init_deviceid_node(struct nfs4_deviceid_node *,
> struct nfs4_deviceid_node *nfs4_insert_deviceid_node(struct nfs4_deviceid_node *);
> bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
> void nfs4_deviceid_purge_client(const struct nfs_client *);
> +void nfs4_init_deviceid_cache(void);
>
> static inline int lo_fail_bit(u32 iomode)
> {
> diff --git a/fs/nfs/pnfs_dev.c b/fs/nfs/pnfs_dev.c
> index 037a5c6..923a9da 100644
> --- a/fs/nfs/pnfs_dev.c
> +++ b/fs/nfs/pnfs_dev.c
> @@ -161,6 +161,15 @@ nfs4_init_deviceid_node(struct nfs4_deviceid_node *d,
> }
> EXPORT_SYMBOL_GPL(nfs4_init_deviceid_node);
>
> +void
> +nfs4_init_deviceid_cache()
> +{
> + long h;
> +
> + for (h = 0; h < NFS4_DEVICE_ID_HASH_SIZE; h++)
> + INIT_HLIST_HEAD(&nfs4_deviceid_cache[h]);
> +}
> +
> /*
> * Uniquely initialize and insert a deviceid node into cache
> *
> @@ -236,9 +245,10 @@ _deviceid_purge_client(const struct nfs_client *clp, long hash)
>
> synchronize_rcu();
> while (!hlist_empty(&tmp)) {
> + d = hlist_entry(tmp.first, struct nfs4_deviceid_node, tmpnode);
> + hlist_del_init(&d->tmpnode);
nit: hlist_del rather than hlist_del_init should be enough here...
Benny
> if (atomic_dec_and_test(&d->ref))
> d->ld->free_deviceid_node(d);
> - hlist_del_init(&d->tmpnode);
> }
> }
>
> @@ -247,6 +257,8 @@ nfs4_deviceid_purge_client(const struct nfs_client *clp)
> {
> long h;
>
> + if (!(clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_MDS))
> + return;
> for (h = 0; h < NFS4_DEVICE_ID_HASH_SIZE; h++)
> _deviceid_purge_client(clp, h);
> }
--
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