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From: "J. Bruce Fields" <bfields@redhat.com>
To: linux-nfs@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, abe@purdue.edu,
	lsof-l@lists.purdue.edu, util-linux@vger.kernel.org,
	jlayton@redhat.com, "J. Bruce Fields" <bfields@redhat.com>
Subject: [PATCH 05/10] nfsd: make client/ directory names small ints
Date: Thu, 25 Apr 2019 10:04:15 -0400
Message-ID: <1556201060-7947-6-git-send-email-bfields@redhat.com> (raw)
In-Reply-To: <1556201060-7947-1-git-send-email-bfields@redhat.com>

From: "J. Bruce Fields" <bfields@redhat.com>

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 <bfields@redhat.com>
---
 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 46d956676480..888b2891960e 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -121,6 +121,7 @@ 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 dfcb90743861..de99bfe3e6e2 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -2221,7 +2221,7 @@ 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 8a2261cdefee..edf4dada42bf 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -1212,7 +1212,7 @@ 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);
 }
@@ -1350,7 +1350,8 @@ static __net_init int nfsd_init_net(struct net *net)
 	nn->nfsd4_grace = 90;
 	nn->somebody_reclaimed = 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);
-- 
2.20.1


  parent reply index

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-25 14:04 [PATCH 00/10] exposing knfsd opens to userspace J. Bruce Fields
2019-04-25 14:04 ` [PATCH 01/10] nfsd: persist nfsd filesystem across mounts J. Bruce Fields
2019-04-25 14:04 ` [PATCH 02/10] nfsd: rename cl_refcount J. Bruce Fields
2019-04-25 14:04 ` [PATCH 03/10] nfsd4: use reference count to free client J. Bruce Fields
2019-04-25 14:04 ` [PATCH 04/10] nfsd: add nfsd/clients directory J. Bruce Fields
2019-04-25 14:04 ` J. Bruce Fields [this message]
2019-04-25 14:04 ` [PATCH 06/10] rpc: replace rpc_filelist by tree_descr J. Bruce Fields
2019-04-25 14:04 ` [PATCH 07/10] nfsd4: add a client info file J. Bruce Fields
2019-04-25 14:04 ` [PATCH 08/10] nfsd4: add file to display list of client's opens J. Bruce Fields
2019-04-25 18:04   ` Jeff Layton
2019-04-25 20:14     ` bfields
2019-04-25 21:14       ` Andreas Dilger
2019-04-26  1:18         ` J. Bruce Fields
2019-05-16  0:40           ` J. Bruce Fields
2019-04-25 14:04 ` [PATCH 09/10] nfsd: expose some more information about NFSv4 opens J. Bruce Fields
2019-05-02 15:28   ` Benjamin Coddington
2019-05-02 15:58     ` Andrew W Elble
2019-05-07  1:02       ` bfields
2019-04-25 14:04 ` [PATCH 10/10] nfsd: add more information to client info file J. Bruce Fields
2019-04-25 17:02 ` [PATCH 00/10] exposing knfsd opens to userspace Jeff Layton
2019-04-25 20:01   ` bfields
2019-04-25 18:17 ` Jeff Layton
2019-04-25 21:08 ` Andreas Dilger
2019-04-25 23:20   ` NeilBrown
2019-04-26 11:00     ` Andreas Dilger
2019-04-26 12:56       ` bfields
2019-04-26 23:55         ` NeilBrown
2019-04-27 19:00           ` J. Bruce Fields
2019-04-28 22:57             ` NeilBrown
2019-04-27  0:03       ` NeilBrown

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