leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

NFSv4: use unique client identifiers in network namespaces

Browse Source 
In order to differentiate client state, assign a random uuid to the
uniquifing portion of the client identifier when a network namespace is
created.  Containers may still override this value if they wish to maintain
stable client identifiers by writing to /sys/fs/nfs/net/client/identifier,
either by udev rules or other means.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Benjamin Coddington 2022-02-09 09:07:01 -05:00 committed by Trond Myklebust
parent 43245eca6e
commit 50c790a0b6
1 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
fs/nfs/sysfs.c
View File

@ -151,6 +151,18 @@ static struct kobj_type nfs_netns_client_type = {
.namespace = nfs_netns_client_namespace,
};
static void assign_unique_clientid(struct nfs_netns_client *clp)
{
unsigned char client_uuid[16];
char *uuid_str = kmalloc(UUID_STRING_LEN + 1, GFP_KERNEL);
if (uuid_str) {
generate_random_uuid(client_uuid);
sprintf(uuid_str, "%pU", client_uuid);
rcu_assign_pointer(clp->identifier, uuid_str);
}
}
static struct nfs_netns_client *nfs_netns_client_alloc(struct kobject *parent,
struct net *net)
{
@ -158,6 +170,8 @@ static struct nfs_netns_client *nfs_netns_client_alloc(struct kobject *parent,
p = kzalloc(sizeof(*p), GFP_KERNEL);
if (p) {
if (net != &init_net)
assign_unique_clientid(p);
p->net = net;
p->kobject.kset = nfs_client_kset;
if (kobject_init_and_add(&p->kobject, &nfs_netns_client_type,