diff options
| -rw-r--r-- | fs/nfs/nfs4proc.c | 2 | ||||
| -rw-r--r-- | fs/nfs/pnfs.h | 2 | ||||
| -rw-r--r-- | fs/nfs/pnfs_dev.c | 9 |
3 files changed, 13 insertions, 0 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index ba8b2b5..9ff8c63 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -7962,6 +7962,8 @@ _nfs4_proc_getdeviceinfo(struct nfs_server *server, status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); if (res.notification & ~args.notify_types) dprintk("%s: unsupported notification\n", __func__); + if (res.notification != args.notify_types) + pdev->nocache = 1; dprintk("<-- %s status=%d\n", __func__, status); diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index a1fc16c..b5654e8 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -203,6 +203,7 @@ struct pnfs_device { struct page **pages; unsigned int pgbase; unsigned int pglen; /* reply buffer length */ + unsigned char nocache : 1;/* May not be cached */ }; #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 @@ -291,6 +292,7 @@ void pnfs_error_mark_layout_for_return(struct inode *inode, enum { NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ + NFS_DEVICEID_NOCACHE, /* device may not be cached */ }; /* pnfs_dev.c */ diff --git a/fs/nfs/pnfs_dev.c b/fs/nfs/pnfs_dev.c index 7e07f4b..2961fcd 100644 --- a/fs/nfs/pnfs_dev.c +++ b/fs/nfs/pnfs_dev.c @@ -149,6 +149,8 @@ nfs4_get_device_info(struct nfs_server *server, */ d = server->pnfs_curr_ld->alloc_deviceid_node(server, pdev, gfp_flags); + if (d && pdev->nocache) + set_bit(NFS_DEVICEID_NOCACHE, &d->flags); out_free_pages: for (i = 0; i < max_pages; i++) @@ -235,6 +237,7 @@ nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *ld, return; } hlist_del_init_rcu(&d->node); + clear_bit(NFS_DEVICEID_NOCACHE, &d->flags); spin_unlock(&nfs4_deviceid_lock); /* balance the initial ref set in pnfs_insert_deviceid */ @@ -269,6 +272,11 @@ EXPORT_SYMBOL_GPL(nfs4_init_deviceid_node); bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *d) { + if (test_bit(NFS_DEVICEID_NOCACHE, &d->flags)) { + if (atomic_add_unless(&d->ref, -1, 2)) + return false; + nfs4_delete_deviceid(d->ld, d->nfs_client, &d->deviceid); + } if (!atomic_dec_and_test(&d->ref)) return false; d->ld->free_deviceid_node(d); @@ -312,6 +320,7 @@ _deviceid_purge_client(const struct nfs_client *clp, long hash) if (d->nfs_client == clp && atomic_read(&d->ref)) { hlist_del_init_rcu(&d->node); hlist_add_head(&d->tmpnode, &tmp); + clear_bit(NFS_DEVICEID_NOCACHE, &d->flags); } rcu_read_unlock(); spin_unlock(&nfs4_deviceid_lock); |
