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sunrpc: add xprt id 

This adds a unique identifier for a sunrpc transport in sysfs, which is
similarly managed to the unique IDs of clients.

Signed-off-by: Dan Aloni <dan@kernelim.com>
Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Olga Kornievskaia 2021-06-08 15:59:13 -04:00 committed by Trond Myklebust
parent c5a382ebdb
commit 572caba402
3 changed files with 29 additions and 0 deletions
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2
include/linux/sunrpc/xprt.h
View File

@ -185,6 +185,7 @@ enum xprt_transports {
struct rpc_xprt {
struct kref kref; /* Reference count */
const struct rpc_xprt_ops *ops; /* transport methods */
unsigned int id; /* transport id */
const struct rpc_timeout *timeout; /* timeout parms */
struct sockaddr_storage addr; /* server address */
@ -370,6 +371,7 @@ struct rpc_xprt * xprt_alloc(struct net *net, size_t size,
void xprt_free(struct rpc_xprt *);
void xprt_add_backlog(struct rpc_xprt *xprt, struct rpc_task *task);
bool xprt_wake_up_backlog(struct rpc_xprt *xprt, struct rpc_rqst *req);
void xprt_cleanup_ids(void);
static inline int
xprt_enable_swap(struct rpc_xprt *xprt)

1
net/sunrpc/sunrpc_syms.c
View File

@ -133,6 +133,7 @@ cleanup_sunrpc(void)
{
rpc_sysfs_exit();
rpc_cleanup_clids();
xprt_cleanup_ids();
rpcauth_remove_module();
cleanup_socket_xprt();
svc_cleanup_xprt_sock();

26
net/sunrpc/xprt.c
View File

@ -1746,6 +1746,30 @@ static void xprt_free_all_slots(struct rpc_xprt *xprt)
}
}
static DEFINE_IDA(rpc_xprt_ids);
void xprt_cleanup_ids(void)
{
ida_destroy(&rpc_xprt_ids);
}
static int xprt_alloc_id(struct rpc_xprt *xprt)
{
int id;
id = ida_simple_get(&rpc_xprt_ids, 0, 0, GFP_KERNEL);
if (id < 0)
return id;
xprt->id = id;
return 0;
}
static void xprt_free_id(struct rpc_xprt *xprt)
{
ida_simple_remove(&rpc_xprt_ids, xprt->id);
}
struct rpc_xprt *xprt_alloc(struct net *net, size_t size,
unsigned int num_prealloc,
unsigned int max_alloc)
@ -1758,6 +1782,7 @@ struct rpc_xprt *xprt_alloc(struct net *net, size_t size,
if (xprt == NULL)
goto out;
xprt_alloc_id(xprt);
xprt_init(xprt, net);
for (i = 0; i < num_prealloc; i++) {
@ -1786,6 +1811,7 @@ void xprt_free(struct rpc_xprt *xprt)
{
put_net(xprt->xprt_net);
xprt_free_all_slots(xprt);
xprt_free_id(xprt);
kfree_rcu(xprt, rcu);
}
EXPORT_SYMBOL_GPL(xprt_free);