From bf5ed3e3bb84c39d70ad10b2f8e47ec62f4c63b1 Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Thu, 14 Mar 2019 16:20:19 -0400 Subject: [PATCH] nfsd: make client/ directory names small ints We want clientid's on the wire to be randomized for reasons explained in ebd7c72c63ac "nfsd: randomize SETCLIENTID reply to help distinguish servers". But I'd rather have mostly small integers for the clients/ directory. Signed-off-by: J. Bruce Fields --- fs/nfsd/netns.h | 1 + fs/nfsd/nfs4state.c | 2 +- fs/nfsd/nfsctl.c | 5 +++-- 3 files changed, 5 insertions(+), 3 deletions(-) diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h index ad1d743..bdfe5bc 100644 --- a/fs/nfsd/netns.h +++ b/fs/nfsd/netns.h @@ -111,6 +111,7 @@ struct nfsd_net { */ unsigned int max_connections; + u32 clientid_base; u32 clientid_counter; u32 clverifier_counter; diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 7d8d1fc..8f9747d 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -2242,7 +2242,7 @@ static struct nfs4_client *create_client(struct xdr_netobj name, clp->cl_cb_session = NULL; clp->net = net; clp->cl_nfsd_dentry = nfsd_client_mkdir(nn, &clp->cl_nfsdfs, - clp->cl_clientid.cl_id); + clp->cl_clientid.cl_id - nn->clientid_base); if (!clp->cl_nfsd_dentry) { free_client(clp); return NULL; diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 5a1920a..599d600 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -1213,7 +1213,7 @@ struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, struct nfsdfs_client *ncl, { char name[11]; - sprintf(name, "%d", id++); + sprintf(name, "%u", id); return nfsd_mkdir(nn->nfsd_client_dir, ncl, name); } @@ -1352,7 +1352,8 @@ static __net_init int nfsd_init_net(struct net *net) nn->somebody_reclaimed = false; nn->track_reclaim_completes = false; nn->clverifier_counter = prandom_u32(); - nn->clientid_counter = prandom_u32(); + nn->clientid_base = prandom_u32(); + nn->clientid_counter = nn->clientid_base + 1; nn->s2s_cp_cl_id = nn->clientid_counter++; atomic_set(&nn->ntf_refcnt, 0); -- 2.7.4