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sunrpc: add IDs to multipath

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This is used to uniquely identify sunrpc multipath objects in /sys.

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 15:59:14 -04:00 committed by Trond Myklebust
parent 572caba402
commit 5b9268727f
3 changed files with 31 additions and 0 deletions
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4
include/linux/sunrpc/xprtmultipath.h
View File

@ -14,6 +14,7 @@ struct rpc_xprt_switch {
spinlock_t xps_lock;
struct kref xps_kref;
unsigned int xps_id;
unsigned int xps_nxprts;
unsigned int xps_nactive;
atomic_long_t xps_queuelen;
@ -71,4 +72,7 @@ extern struct rpc_xprt *xprt_iter_get_next(struct rpc_xprt_iter *xpi);
extern bool rpc_xprt_switch_has_addr(struct rpc_xprt_switch *xps,
const struct sockaddr *sap);
extern void xprt_multipath_cleanup_ids(void);
#endif

1
net/sunrpc/sunrpc_syms.c
View File

@ -134,6 +134,7 @@ cleanup_sunrpc(void)
rpc_sysfs_exit();
rpc_cleanup_clids();
xprt_cleanup_ids();
xprt_multipath_cleanup_ids();
rpcauth_remove_module();
cleanup_socket_xprt();
svc_cleanup_xprt_sock();

26
net/sunrpc/xprtmultipath.c
View File

@ -86,6 +86,30 @@ void rpc_xprt_switch_remove_xprt(struct rpc_xprt_switch *xps,
xprt_put(xprt);
}
static DEFINE_IDA(rpc_xprtswitch_ids);
void xprt_multipath_cleanup_ids(void)
{
ida_destroy(&rpc_xprtswitch_ids);
}
static int xprt_switch_alloc_id(struct rpc_xprt_switch *xps, gfp_t gfp_flags)
{
int id;
id = ida_simple_get(&rpc_xprtswitch_ids, 0, 0, gfp_flags);
if (id < 0)
return id;
xps->xps_id = id;
return 0;
}
static void xprt_switch_free_id(struct rpc_xprt_switch *xps)
{
ida_simple_remove(&rpc_xprtswitch_ids, xps->xps_id);
}
/**
* xprt_switch_alloc - Allocate a new struct rpc_xprt_switch
* @xprt: pointer to struct rpc_xprt
@ -103,6 +127,7 @@ struct rpc_xprt_switch *xprt_switch_alloc(struct rpc_xprt *xprt,
if (xps != NULL) {
spin_lock_init(&xps->xps_lock);
kref_init(&xps->xps_kref);
xprt_switch_alloc_id(xps, gfp_flags);
xps->xps_nxprts = xps->xps_nactive = 0;
atomic_long_set(&xps->xps_queuelen, 0);
xps->xps_net = NULL;
@ -136,6 +161,7 @@ static void xprt_switch_free(struct kref *kref)
struct rpc_xprt_switch, xps_kref);
xprt_switch_free_entries(xps);
xprt_switch_free_id(xps);
kfree_rcu(xps, xps_rcu);
}