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rxrpc: Support network namespacing

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Support network namespacing in AF_RXRPC with the following changes:

 (1) All the local endpoint, peer and call lists, locks, counters, etc. are
     moved into the per-namespace record.

 (2) All the connection tracking is moved into the per-namespace record
     with the exception of the client connection ID tree, which is kept
     global so that connection IDs are kept unique per-machine.

 (3) Each namespace gets its own epoch.  This allows each network namespace
     to pretend to be a separate client machine.

 (4) The /proc/net/rxrpc_xxx files are now called /proc/net/rxrpc/xxx and
     the contents reflect the namespace.

fs/afs/ should be okay with this patch as it explicitly requires the current
net namespace to be init_net to permit a mount to proceed at the moment.  It
will, however, need updating so that cells, IP addresses and DNS records are
per-namespace also.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Howells 2017-05-24 17:02:32 +01:00 committed by David S. Miller
parent 878cd3ba37
commit 2baec2c3f8
12 changed files with 356 additions and 216 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

1
net/rxrpc/Makefile
View file

@ -19,6 +19,7 @@ rxrpc-y := \
local_event.o \
local_object.o \
misc.o \
net_ns.o \
output.o \
peer_event.o \
peer_object.o \

35
net/rxrpc/af_rxrpc.c
View file

@ -38,9 +38,6 @@ MODULE_PARM_DESC(debug, "RxRPC debugging mask");
static struct proto rxrpc_proto;
static const struct proto_ops rxrpc_rpc_ops;
/* local epoch for detecting local-end reset */
u32 rxrpc_epoch;
/* current debugging ID */
atomic_t rxrpc_debug_id;
@ -155,7 +152,7 @@ static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len)
memcpy(&rx->srx, srx, sizeof(rx->srx));
local = rxrpc_lookup_local(&rx->srx);
local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx);
if (IS_ERR(local)) {
ret = PTR_ERR(local);
goto error_unlock;
@ -434,7 +431,7 @@ static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len)
ret = -EAFNOSUPPORT;
goto error_unlock;
}
local = rxrpc_lookup_local(&rx->srx);
local = rxrpc_lookup_local(sock_net(sock->sk), &rx->srx);
if (IS_ERR(local)) {
ret = PTR_ERR(local);
goto error_unlock;
@ -582,9 +579,6 @@ static int rxrpc_create(struct net *net, struct socket *sock, int protocol,
_enter("%p,%d", sock, protocol);
if (!net_eq(net, &init_net))
return -EAFNOSUPPORT;
/* we support transport protocol UDP/UDP6 only */
if (protocol != PF_INET &&
IS_ENABLED(CONFIG_AF_RXRPC_IPV6) && protocol != PF_INET6)
@ -780,8 +774,6 @@ static int __init af_rxrpc_init(void)
BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > FIELD_SIZEOF(struct sk_buff, cb));
get_random_bytes(&rxrpc_epoch, sizeof(rxrpc_epoch));
rxrpc_epoch |= RXRPC_RANDOM_EPOCH;
get_random_bytes(&tmp, sizeof(tmp));
tmp &= 0x3fffffff;
if (tmp == 0)
@ -809,6 +801,10 @@ static int __init af_rxrpc_init(void)
goto error_security;
}
ret = register_pernet_subsys(&rxrpc_net_ops);
if (ret)
goto error_pernet;
ret = proto_register(&rxrpc_proto, 1);
if (ret < 0) {
pr_crit("Cannot register protocol\n");
@ -839,11 +835,6 @@ static int __init af_rxrpc_init(void)
goto error_sysctls;
}
#ifdef CONFIG_PROC_FS
proc_create("rxrpc_calls", 0, init_net.proc_net, &rxrpc_call_seq_fops);
proc_create("rxrpc_conns", 0, init_net.proc_net,
&rxrpc_connection_seq_fops);
#endif
return 0;
error_sysctls:
@ -855,6 +846,8 @@ static int __init af_rxrpc_init(void)
error_sock:
proto_unregister(&rxrpc_proto);
error_proto:
unregister_pernet_subsys(&rxrpc_net_ops);
error_pernet:
rxrpc_exit_security();
error_security:
destroy_workqueue(rxrpc_workqueue);
@ -875,14 +868,16 @@ static void __exit af_rxrpc_exit(void)
unregister_key_type(&key_type_rxrpc);
sock_unregister(PF_RXRPC);
proto_unregister(&rxrpc_proto);
rxrpc_destroy_all_calls();
rxrpc_destroy_all_connections();
unregister_pernet_subsys(&rxrpc_net_ops);
ASSERTCMP(atomic_read(&rxrpc_n_tx_skbs), ==, 0);
ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0);
rxrpc_destroy_all_locals();
remove_proc_entry("rxrpc_conns", init_net.proc_net);
remove_proc_entry("rxrpc_calls", init_net.proc_net);
/* Make sure the local and peer records pinned by any dying connections
* are released.
*/
rcu_barrier();
rxrpc_destroy_client_conn_ids();
destroy_workqueue(rxrpc_workqueue);
rxrpc_exit_security();
kmem_cache_destroy(rxrpc_call_jar);

65
net/rxrpc/ar-internal.h
View file

@ -11,6 +11,8 @@
#include <linux/atomic.h>
#include <linux/seqlock.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <net/sock.h>
#include <net/af_rxrpc.h>
#include <rxrpc/packet.h>
@ -64,6 +66,37 @@ enum {
RXRPC_CLOSE, /* socket is being closed */
};
/*
* Per-network namespace data.
*/
struct rxrpc_net {
struct proc_dir_entry *proc_net; /* Subdir in /proc/net */
u32 epoch; /* Local epoch for detecting local-end reset */
struct list_head calls; /* List of calls active in this namespace */
rwlock_t call_lock; /* Lock for ->calls */
struct list_head conn_proc_list; /* List of conns in this namespace for proc */
struct list_head service_conns; /* Service conns in this namespace */
rwlock_t conn_lock; /* Lock for ->conn_proc_list, ->service_conns */
struct delayed_work service_conn_reaper;
unsigned int nr_client_conns;
unsigned int nr_active_client_conns;
bool kill_all_client_conns;
spinlock_t client_conn_cache_lock; /* Lock for ->*_client_conns */
spinlock_t client_conn_discard_lock; /* Prevent multiple discarders */
struct list_head waiting_client_conns;
struct list_head active_client_conns;
struct list_head idle_client_conns;
struct delayed_work client_conn_reaper;
struct list_head local_endpoints;
struct mutex local_mutex; /* Lock for ->local_endpoints */
spinlock_t peer_hash_lock; /* Lock for ->peer_hash */
DECLARE_HASHTABLE (peer_hash, 10);
};
/*
* Service backlog preallocation.
*
@ -211,6 +244,7 @@ struct rxrpc_security {
struct rxrpc_local {
struct rcu_head rcu;
atomic_t usage;
struct rxrpc_net *rxnet; /* The network ns in which this resides */
struct list_head link;
struct socket *socket; /* my UDP socket */
struct work_struct processor;
@ -601,7 +635,6 @@ struct rxrpc_ack_summary {
* af_rxrpc.c
*/
extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
extern u32 rxrpc_epoch;
extern atomic_t rxrpc_debug_id;
extern struct workqueue_struct *rxrpc_workqueue;
@ -634,8 +667,6 @@ extern const char *const rxrpc_call_states[];
extern const char *const rxrpc_call_completions[];
extern unsigned int rxrpc_max_call_lifetime;
extern struct kmem_cache *rxrpc_call_jar;
extern struct list_head rxrpc_calls;
extern rwlock_t rxrpc_call_lock;
struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
struct rxrpc_call *rxrpc_alloc_call(gfp_t);
@ -653,7 +684,7 @@ void rxrpc_see_call(struct rxrpc_call *);
void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
void rxrpc_cleanup_call(struct rxrpc_call *);
void __exit rxrpc_destroy_all_calls(void);
void rxrpc_destroy_all_calls(struct rxrpc_net *);
static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
{
@ -773,7 +804,8 @@ int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *,
void rxrpc_expose_client_call(struct rxrpc_call *);
void rxrpc_disconnect_client_call(struct rxrpc_call *);
void rxrpc_put_client_conn(struct rxrpc_connection *);
void __exit rxrpc_destroy_all_client_connections(void);
void rxrpc_discard_expired_client_conns(struct work_struct *);
void rxrpc_destroy_all_client_connections(struct rxrpc_net *);
/*
* conn_event.c
@ -784,9 +816,6 @@ void rxrpc_process_connection(struct work_struct *);
* conn_object.c
*/
extern unsigned int rxrpc_connection_expiry;
extern struct list_head rxrpc_connections;
extern struct list_head rxrpc_connection_proc_list;
extern rwlock_t rxrpc_connection_lock;
int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
@ -800,7 +829,8 @@ void rxrpc_see_connection(struct rxrpc_connection *);
void rxrpc_get_connection(struct rxrpc_connection *);
struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
void rxrpc_put_service_conn(struct rxrpc_connection *);
void __exit rxrpc_destroy_all_connections(void);
void rxrpc_service_connection_reaper(struct work_struct *);
void rxrpc_destroy_all_connections(struct rxrpc_net *);
static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
{
@ -828,7 +858,7 @@ static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
*/
struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
struct sk_buff *);
struct rxrpc_connection *rxrpc_prealloc_service_connection(gfp_t);
struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *, gfp_t);
void rxrpc_new_incoming_connection(struct rxrpc_connection *, struct sk_buff *);
void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
@ -861,9 +891,9 @@ extern void rxrpc_process_local_events(struct rxrpc_local *);
/*
* local_object.c
*/
struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *);
struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
void __rxrpc_put_local(struct rxrpc_local *);
void __exit rxrpc_destroy_all_locals(void);
void rxrpc_destroy_all_locals(struct rxrpc_net *);
static inline void rxrpc_get_local(struct rxrpc_local *local)
{
@ -901,6 +931,17 @@ extern unsigned int rxrpc_resend_timeout;
extern const s8 rxrpc_ack_priority[];
/*
* net_ns.c
*/
extern unsigned int rxrpc_net_id;
extern struct pernet_operations rxrpc_net_ops;
static inline struct rxrpc_net *rxrpc_net(struct net *net)
{
return net_generic(net, rxrpc_net_id);
}
/*
* output.c
*/

14
net/rxrpc/call_accept.c
View file

@ -38,6 +38,7 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx,
{
const void *here = __builtin_return_address(0);
struct rxrpc_call *call;
struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk));
int max, tmp;
unsigned int size = RXRPC_BACKLOG_MAX;
unsigned int head, tail, call_head, call_tail;
@ -79,7 +80,7 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx,
if (CIRC_CNT(head, tail, size) < max) {
struct rxrpc_connection *conn;
conn = rxrpc_prealloc_service_connection(gfp);
conn = rxrpc_prealloc_service_connection(rxnet, gfp);
if (!conn)
return -ENOMEM;
b->conn_backlog[head] = conn;
@ -136,9 +137,9 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx,
write_unlock(&rx->call_lock);
write_lock(&rxrpc_call_lock);
list_add_tail(&call->link, &rxrpc_calls);
write_unlock(&rxrpc_call_lock);
write_lock(&rxnet->call_lock);
list_add_tail(&call->link, &rxnet->calls);
write_unlock(&rxnet->call_lock);
b->call_backlog[call_head] = call;
smp_store_release(&b->call_backlog_head, (call_head + 1) & (size - 1));
@ -185,6 +186,7 @@ int rxrpc_service_prealloc(struct rxrpc_sock *rx, gfp_t gfp)
void rxrpc_discard_prealloc(struct rxrpc_sock *rx)
{
struct rxrpc_backlog *b = rx->backlog;
struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk));
unsigned int size = RXRPC_BACKLOG_MAX, head, tail;
if (!b)
@ -209,10 +211,10 @@ void rxrpc_discard_prealloc(struct rxrpc_sock *rx)
tail = b->conn_backlog_tail;
while (CIRC_CNT(head, tail, size) > 0) {
struct rxrpc_connection *conn = b->conn_backlog[tail];
write_lock(&rxrpc_connection_lock);
write_lock(&rxnet->conn_lock);
list_del(&conn->link);
list_del(&conn->proc_link);
write_unlock(&rxrpc_connection_lock);
write_unlock(&rxnet->conn_lock);
kfree(conn);
tail = (tail + 1) & (size - 1);
}

39
net/rxrpc/call_object.c
View file

@ -44,8 +44,6 @@ const char *const rxrpc_call_completions[NR__RXRPC_CALL_COMPLETIONS] = {
};
struct kmem_cache *rxrpc_call_jar;
LIST_HEAD(rxrpc_calls);
DEFINE_RWLOCK(rxrpc_call_lock);
static void rxrpc_call_timer_expired(unsigned long _call)
{
@ -207,6 +205,7 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
__releases(&rx->sk.sk_lock.slock)
{
struct rxrpc_call *call, *xcall;
struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk));
struct rb_node *parent, **pp;
const void *here = __builtin_return_address(0);
int ret;
@ -255,9 +254,9 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
write_unlock(&rx->call_lock);
write_lock(&rxrpc_call_lock);
list_add_tail(&call->link, &rxrpc_calls);
write_unlock(&rxrpc_call_lock);
write_lock(&rxnet->call_lock);
list_add_tail(&call->link, &rxnet->calls);
write_unlock(&rxnet->call_lock);
/* From this point on, the call is protected by its own lock. */
release_sock(&rx->sk);
@ -508,6 +507,7 @@ void rxrpc_release_calls_on_socket(struct rxrpc_sock *rx)
*/
void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace op)
{
struct rxrpc_net *rxnet;
const void *here = __builtin_return_address(0);
int n;
@ -520,9 +520,12 @@ void rxrpc_put_call(struct rxrpc_call *call, enum rxrpc_call_trace op)
_debug("call %d dead", call->debug_id);
ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE);
write_lock(&rxrpc_call_lock);
list_del_init(&call->link);
write_unlock(&rxrpc_call_lock);
if (!list_empty(&call->link)) {
rxnet = rxrpc_net(sock_net(&call->socket->sk));
write_lock(&rxnet->call_lock);
list_del_init(&call->link);
write_unlock(&rxnet->call_lock);
}
rxrpc_cleanup_call(call);
}
@ -570,21 +573,23 @@ void rxrpc_cleanup_call(struct rxrpc_call *call)
}
/*
* Make sure that all calls are gone.
* Make sure that all calls are gone from a network namespace. To reach this
* point, any open UDP sockets in that namespace must have been closed, so any
* outstanding calls cannot be doing I/O.
*/
void __exit rxrpc_destroy_all_calls(void)
void rxrpc_destroy_all_calls(struct rxrpc_net *rxnet)
{
struct rxrpc_call *call;
_enter("");
if (list_empty(&rxrpc_calls))
if (list_empty(&rxnet->calls))
return;
write_lock(&rxrpc_call_lock);
write_lock(&rxnet->call_lock);
while (!list_empty(&rxrpc_calls)) {
call = list_entry(rxrpc_calls.next, struct rxrpc_call, link);
while (!list_empty(&rxnet->calls)) {
call = list_entry(rxnet->calls.next, struct rxrpc_call, link);
_debug("Zapping call %p", call);
rxrpc_see_call(call);
@ -595,10 +600,10 @@ void __exit rxrpc_destroy_all_calls(void)
rxrpc_call_states[call->state],
call->flags, call->events);
write_unlock(&rxrpc_call_lock);
write_unlock(&rxnet->call_lock);
cond_resched();
write_lock(&rxrpc_call_lock);
write_lock(&rxnet->call_lock);
}
write_unlock(&rxrpc_call_lock);
write_unlock(&rxnet->call_lock);
}

153
net/rxrpc/conn_client.c
View file

@ -31,7 +31,7 @@
* may freely grant available channels to new calls and calls may be
* waiting on it for channels to become available.
*
* The connection is on the rxrpc_active_client_conns list which is kept
* The connection is on the rxnet->active_client_conns list which is kept
* in activation order for culling purposes.
*
* rxrpc_nr_active_client_conns is held incremented also.
@ -46,7 +46,7 @@
* expires, the EXPOSED flag is cleared and the connection transitions to
* the INACTIVE state.
*
* The connection is on the rxrpc_idle_client_conns list which is kept in
* The connection is on the rxnet->idle_client_conns list which is kept in
* order of how soon they'll expire.
*
* There are flags of relevance to the cache:
@ -85,27 +85,13 @@ __read_mostly unsigned int rxrpc_reap_client_connections = 900;
__read_mostly unsigned int rxrpc_conn_idle_client_expiry = 2 * 60 * HZ;
__read_mostly unsigned int rxrpc_conn_idle_client_fast_expiry = 2 * HZ;
static unsigned int rxrpc_nr_client_conns;
static unsigned int rxrpc_nr_active_client_conns;
static __read_mostly bool rxrpc_kill_all_client_conns;
static DEFINE_SPINLOCK(rxrpc_client_conn_cache_lock);
static DEFINE_SPINLOCK(rxrpc_client_conn_discard_mutex);
static LIST_HEAD(rxrpc_waiting_client_conns);
static LIST_HEAD(rxrpc_active_client_conns);
static LIST_HEAD(rxrpc_idle_client_conns);
/*
* We use machine-unique IDs for our client connections.
*/
DEFINE_IDR(rxrpc_client_conn_ids);
static DEFINE_SPINLOCK(rxrpc_conn_id_lock);
static void rxrpc_cull_active_client_conns(void);
static void rxrpc_discard_expired_client_conns(struct work_struct *);
static DECLARE_DELAYED_WORK(rxrpc_client_conn_reap,
rxrpc_discard_expired_client_conns);
static void rxrpc_cull_active_client_conns(struct rxrpc_net *);
/*
* Get a connection ID and epoch for a client connection from the global pool.
@ -116,6 +102,7 @@ static DECLARE_DELAYED_WORK(rxrpc_client_conn_reap,
static int rxrpc_get_client_connection_id(struct rxrpc_connection *conn,
gfp_t gfp)
{
struct rxrpc_net *rxnet = conn->params.local->rxnet;
int id;
_enter("");
@ -131,7 +118,7 @@ static int rxrpc_get_client_connection_id(struct rxrpc_connection *conn,
spin_unlock(&rxrpc_conn_id_lock);
idr_preload_end();
conn->proto.epoch = rxrpc_epoch;
conn->proto.epoch = rxnet->epoch;
conn->proto.cid = id << RXRPC_CIDSHIFT;
set_bit(RXRPC_CONN_HAS_IDR, &conn->flags);
_leave(" [CID %x]", conn->proto.cid);
@ -183,6 +170,7 @@ static struct rxrpc_connection *
rxrpc_alloc_client_connection(struct rxrpc_conn_parameters *cp, gfp_t gfp)
{
struct rxrpc_connection *conn;
struct rxrpc_net *rxnet = cp->local->rxnet;
int ret;
_enter("");
@ -213,9 +201,9 @@ rxrpc_alloc_client_connection(struct rxrpc_conn_parameters *cp, gfp_t gfp)
if (ret < 0)
goto error_2;
write_lock(&rxrpc_connection_lock);
list_add_tail(&conn->proc_link, &rxrpc_connection_proc_list);
write_unlock(&rxrpc_connection_lock);
write_lock(&rxnet->conn_lock);
list_add_tail(&conn->proc_link, &rxnet->conn_proc_list);
write_unlock(&rxnet->conn_lock);
/* We steal the caller's peer ref. */
cp->peer = NULL;
@ -243,12 +231,13 @@ rxrpc_alloc_client_connection(struct rxrpc_conn_parameters *cp, gfp_t gfp)
*/
static bool rxrpc_may_reuse_conn(struct rxrpc_connection *conn)
{
struct rxrpc_net *rxnet = conn->params.local->rxnet;
int id_cursor, id, distance, limit;
if (test_bit(RXRPC_CONN_DONT_REUSE, &conn->flags))
goto dont_reuse;
if (conn->proto.epoch != rxrpc_epoch)
if (conn->proto.epoch != rxnet->epoch)
goto mark_dont_reuse;
/* The IDR tree gets very expensive on memory if the connection IDs are
@ -440,12 +429,13 @@ static int rxrpc_get_client_conn(struct rxrpc_call *call,
/*
* Activate a connection.
*/
static void rxrpc_activate_conn(struct rxrpc_connection *conn)
static void rxrpc_activate_conn(struct rxrpc_net *rxnet,
struct rxrpc_connection *conn)
{
trace_rxrpc_client(conn, -1, rxrpc_client_to_active);
conn->cache_state = RXRPC_CONN_CLIENT_ACTIVE;
rxrpc_nr_active_client_conns++;
list_move_tail(&conn->cache_link, &rxrpc_active_client_conns);
rxnet->nr_active_client_conns++;
list_move_tail(&conn->cache_link, &rxnet->active_client_conns);
}
/*
@ -460,7 +450,8 @@ static void rxrpc_activate_conn(struct rxrpc_connection *conn)
* channels if it has been culled to make space and then re-requested by a new
* call.
*/
static void rxrpc_animate_client_conn(struct rxrpc_connection *conn)
static void rxrpc_animate_client_conn(struct rxrpc_net *rxnet,
struct rxrpc_connection *conn)
{
unsigned int nr_conns;
@ -469,12 +460,12 @@ static void rxrpc_animate_client_conn(struct rxrpc_connection *conn)
if (conn->cache_state == RXRPC_CONN_CLIENT_ACTIVE)
goto out;
spin_lock(&rxrpc_client_conn_cache_lock);
spin_lock(&rxnet->client_conn_cache_lock);
nr_conns = rxrpc_nr_client_conns;
nr_conns = rxnet->nr_client_conns;
if (!test_and_set_bit(RXRPC_CONN_COUNTED, &conn->flags)) {
trace_rxrpc_client(conn, -1, rxrpc_client_count);
rxrpc_nr_client_conns = nr_conns + 1;
rxnet->nr_client_conns = nr_conns + 1;
}
switch (conn->cache_state) {
@ -494,21 +485,21 @@ static void rxrpc_animate_client_conn(struct rxrpc_connection *conn)
}
out_unlock:
spin_unlock(&rxrpc_client_conn_cache_lock);
spin_unlock(&rxnet->client_conn_cache_lock);
out:
_leave(" [%d]", conn->cache_state);
return;
activate_conn:
_debug("activate");
rxrpc_activate_conn(conn);
rxrpc_activate_conn(rxnet, conn);
goto out_unlock;
wait_for_capacity:
_debug("wait");
trace_rxrpc_client(conn, -1, rxrpc_client_to_waiting);
conn->cache_state = RXRPC_CONN_CLIENT_WAITING;
list_move_tail(&conn->cache_link, &rxrpc_waiting_client_conns);
list_move_tail(&conn->cache_link, &rxnet->waiting_client_conns);
goto out_unlock;
}
@ -660,18 +651,19 @@ int rxrpc_connect_call(struct rxrpc_call *call,
struct sockaddr_rxrpc *srx,
gfp_t gfp)
{
struct rxrpc_net *rxnet = cp->local->rxnet;
int ret;
_enter("{%d,%lx},", call->debug_id, call->user_call_ID);
rxrpc_discard_expired_client_conns(NULL);
rxrpc_cull_active_client_conns();
rxrpc_discard_expired_client_conns(&rxnet->client_conn_reaper.work);
rxrpc_cull_active_client_conns(rxnet);
ret = rxrpc_get_client_conn(call, cp, srx, gfp);
if (ret < 0)
return ret;
rxrpc_animate_client_conn(call->conn);
rxrpc_animate_client_conn(rxnet, call->conn);
rxrpc_activate_channels(call->conn);
ret = rxrpc_wait_for_channel(call, gfp);
@ -729,6 +721,7 @@ void rxrpc_disconnect_client_call(struct rxrpc_call *call)
unsigned int channel = call->cid & RXRPC_CHANNELMASK;
struct rxrpc_connection *conn = call->conn;
struct rxrpc_channel *chan = &conn->channels[channel];
struct rxrpc_net *rxnet = rxrpc_net(sock_net(&call->socket->sk));
trace_rxrpc_client(conn, channel, rxrpc_client_chan_disconnect);
call->conn = NULL;
@ -750,7 +743,7 @@ void rxrpc_disconnect_client_call(struct rxrpc_call *call)
/* We must deactivate or idle the connection if it's now
* waiting for nothing.
*/
spin_lock(&rxrpc_client_conn_cache_lock);
spin_lock(&rxnet->client_conn_cache_lock);
if (conn->cache_state == RXRPC_CONN_CLIENT_WAITING &&
list_empty(&conn->waiting_calls) &&
!conn->active_chans)
@ -787,14 +780,14 @@ void rxrpc_disconnect_client_call(struct rxrpc_call *call)
* list. It might even get moved back to the active list whilst we're
* waiting for the lock.
*/
spin_lock(&rxrpc_client_conn_cache_lock);
spin_lock(&rxnet->client_conn_cache_lock);
switch (conn->cache_state) {
case RXRPC_CONN_CLIENT_ACTIVE:
if (list_empty(&conn->waiting_calls)) {
rxrpc_deactivate_one_channel(conn, channel);
if (!conn->active_chans) {
rxrpc_nr_active_client_conns--;
rxnet->nr_active_client_conns--;
goto idle_connection;
}
goto out;
@ -820,7 +813,7 @@ void rxrpc_disconnect_client_call(struct rxrpc_call *call)
}
out:
spin_unlock(&rxrpc_client_conn_cache_lock);
spin_unlock(&rxnet->client_conn_cache_lock);
out_2:
spin_unlock(&conn->channel_lock);
rxrpc_put_connection(conn);
@ -835,11 +828,11 @@ void rxrpc_disconnect_client_call(struct rxrpc_call *call)
trace_rxrpc_client(conn, channel, rxrpc_client_to_idle);
conn->idle_timestamp = jiffies;
conn->cache_state = RXRPC_CONN_CLIENT_IDLE;
list_move_tail(&conn->cache_link, &rxrpc_idle_client_conns);
if (rxrpc_idle_client_conns.next == &conn->cache_link &&
!rxrpc_kill_all_client_conns)
list_move_tail(&conn->cache_link, &rxnet->idle_client_conns);
if (rxnet->idle_client_conns.next == &conn->cache_link &&
!rxnet->kill_all_client_conns)
queue_delayed_work(rxrpc_workqueue,
&rxrpc_client_conn_reap,
&rxnet->client_conn_reaper,
rxrpc_conn_idle_client_expiry);
} else {
trace_rxrpc_client(conn, channel, rxrpc_client_to_inactive);
@ -857,6 +850,7 @@ rxrpc_put_one_client_conn(struct rxrpc_connection *conn)
{
struct rxrpc_connection *next = NULL;
struct rxrpc_local *local = conn->params.local;
struct rxrpc_net *rxnet = local->rxnet;
unsigned int nr_conns;
trace_rxrpc_client(conn, -1, rxrpc_client_cleanup);
@ -875,18 +869,18 @@ rxrpc_put_one_client_conn(struct rxrpc_connection *conn)
if (test_bit(RXRPC_CONN_COUNTED, &conn->flags)) {
trace_rxrpc_client(conn, -1, rxrpc_client_uncount);
spin_lock(&rxrpc_client_conn_cache_lock);
nr_conns = --rxrpc_nr_client_conns;
spin_lock(&rxnet->client_conn_cache_lock);
nr_conns = --rxnet->nr_client_conns;
if (nr_conns < rxrpc_max_client_connections &&
!list_empty(&rxrpc_waiting_client_conns)) {
next = list_entry(rxrpc_waiting_client_conns.next,
!list_empty(&rxnet->waiting_client_conns)) {
next = list_entry(rxnet->waiting_client_conns.next,
struct rxrpc_connection, cache_link);
rxrpc_get_connection(next);
rxrpc_activate_conn(next);
rxrpc_activate_conn(rxnet, next);
}
spin_unlock(&rxrpc_client_conn_cache_lock);
spin_unlock(&rxnet->client_conn_cache_lock);
}
rxrpc_kill_connection(conn);
@ -921,10 +915,10 @@ void rxrpc_put_client_conn(struct rxrpc_connection *conn)
/*
* Kill the longest-active client connections to make room for new ones.
*/
static void rxrpc_cull_active_client_conns(void)
static void rxrpc_cull_active_client_conns(struct rxrpc_net *rxnet)
{
struct rxrpc_connection *conn;
unsigned int nr_conns = rxrpc_nr_client_conns;
unsigned int nr_conns = rxnet->nr_client_conns;
unsigned int nr_active, limit;
_enter("");
@ -936,12 +930,12 @@ static void rxrpc_cull_active_client_conns(void)
}
limit = rxrpc_reap_client_connections;
spin_lock(&rxrpc_client_conn_cache_lock);
nr_active = rxrpc_nr_active_client_conns;
spin_lock(&rxnet->client_conn_cache_lock);
nr_active = rxnet->nr_active_client_conns;
while (nr_active > limit) {
ASSERT(!list_empty(&rxrpc_active_client_conns));
conn = list_entry(rxrpc_active_client_conns.next,
ASSERT(!list_empty(&rxnet->active_client_conns));
conn = list_entry(rxnet->active_client_conns.next,
struct rxrpc_connection, cache_link);
ASSERTCMP(conn->cache_state, ==, RXRPC_CONN_CLIENT_ACTIVE);
@ -953,14 +947,14 @@ static void rxrpc_cull_active_client_conns(void)
trace_rxrpc_client(conn, -1, rxrpc_client_to_waiting);
conn->cache_state = RXRPC_CONN_CLIENT_WAITING;
list_move_tail(&conn->cache_link,
&rxrpc_waiting_client_conns);
&rxnet->waiting_client_conns);
}
nr_active--;
}
rxrpc_nr_active_client_conns = nr_active;
spin_unlock(&rxrpc_client_conn_cache_lock);
rxnet->nr_active_client_conns = nr_active;
spin_unlock(&rxnet->client_conn_cache_lock);
ASSERTCMP(nr_active, >=, 0);
_leave(" [culled]");
}
@ -972,22 +966,25 @@ static void rxrpc_cull_active_client_conns(void)
* This may be called from conn setup or from a work item so cannot be
* considered non-reentrant.
*/
static void rxrpc_discard_expired_client_conns(struct work_struct *work)
void rxrpc_discard_expired_client_conns(struct work_struct *work)
{
struct rxrpc_connection *conn;
struct rxrpc_net *rxnet =
container_of(to_delayed_work(work),
struct rxrpc_net, client_conn_reaper);
unsigned long expiry, conn_expires_at, now;
unsigned int nr_conns;
bool did_discard = false;
_enter("%c", work ? 'w' : 'n');
_enter("");
if (list_empty(&rxrpc_idle_client_conns)) {
if (list_empty(&rxnet->idle_client_conns)) {
_leave(" [empty]");
return;
}
/* Don't double up on the discarding */
if (!spin_trylock(&rxrpc_client_conn_discard_mutex)) {
if (!spin_trylock(&rxnet->client_conn_discard_lock)) {
_leave(" [already]");
return;
}
@ -995,19 +992,19 @@ static void rxrpc_discard_expired_client_conns(struct work_struct *work)
/* We keep an estimate of what the number of conns ought to be after
* we've discarded some so that we don't overdo the discarding.
*/
nr_conns = rxrpc_nr_client_conns;
nr_conns = rxnet->nr_client_conns;
next:
spin_lock(&rxrpc_client_conn_cache_lock);
spin_lock(&rxnet->client_conn_cache_lock);
if (list_empty(&rxrpc_idle_client_conns))
if (list_empty(&rxnet->idle_client_conns))
goto out;
conn = list_entry(rxrpc_idle_client_conns.next,
conn = list_entry(rxnet->idle_client_conns.next,
struct rxrpc_connection, cache_link);
ASSERT(test_bit(RXRPC_CONN_EXPOSED, &conn->flags));
if (!rxrpc_kill_all_client_conns) {
if (!rxnet->kill_all_client_conns) {
/* If the number of connections is over the reap limit, we
* expedite discard by reducing the expiry timeout. We must,
* however, have at least a short grace period to be able to do
@ -1030,7 +1027,7 @@ static void rxrpc_discard_expired_client_conns(struct work_struct *work)
conn->cache_state = RXRPC_CONN_CLIENT_INACTIVE;
list_del_init(&conn->cache_link);
spin_unlock(&rxrpc_client_conn_cache_lock);
spin_unlock(&rxnet->client_conn_cache_lock);
/* When we cleared the EXPOSED flag, we took on responsibility for the
* reference that that had on the usage count. We deal with that here.
@ -1050,14 +1047,14 @@ static void rxrpc_discard_expired_client_conns(struct work_struct *work)
* then things get messier.
*/
_debug("not yet");
if (!rxrpc_kill_all_client_conns)
if (!rxnet->kill_all_client_conns)
queue_delayed_work(rxrpc_workqueue,
&rxrpc_client_conn_reap,
&rxnet->client_conn_reaper,
conn_expires_at - now);
out:
spin_unlock(&rxrpc_client_conn_cache_lock);
spin_unlock(&rxrpc_client_conn_discard_mutex);
spin_unlock(&rxnet->client_conn_cache_lock);
spin_unlock(&rxnet->client_conn_discard_lock);
_leave("");
}
@ -1065,17 +1062,17 @@ static void rxrpc_discard_expired_client_conns(struct work_struct *work)
* Preemptively destroy all the client connection records rather than waiting
* for them to time out
*/
void __exit rxrpc_destroy_all_client_connections(void)
void rxrpc_destroy_all_client_connections(struct rxrpc_net *rxnet)
{
_enter("");
spin_lock(&rxrpc_client_conn_cache_lock);
rxrpc_kill_all_client_conns = true;
spin_unlock(&rxrpc_client_conn_cache_lock);
spin_lock(&rxnet->client_conn_cache_lock);
rxnet->kill_all_client_conns = true;
spin_unlock(&rxnet->client_conn_cache_lock);
cancel_delayed_work(&rxrpc_client_conn_reap);
cancel_delayed_work(&rxnet->client_conn_reaper);
if (!queue_delayed_work(rxrpc_workqueue, &rxrpc_client_conn_reap, 0))
if (!queue_delayed_work(rxrpc_workqueue, &rxnet->client_conn_reaper, 0))
_debug("destroy: queue failed");
_leave("");

55
net/rxrpc/conn_object.c
View file

@ -22,13 +22,6 @@
*/
unsigned int rxrpc_connection_expiry = 10 * 60;
static void rxrpc_connection_reaper(struct work_struct *work);
LIST_HEAD(rxrpc_connections);
LIST_HEAD(rxrpc_connection_proc_list);
DEFINE_RWLOCK(rxrpc_connection_lock);
static DECLARE_DELAYED_WORK(rxrpc_connection_reap, rxrpc_connection_reaper);
static void rxrpc_destroy_connection(struct rcu_head *);
/*
@ -222,15 +215,17 @@ void rxrpc_disconnect_call(struct rxrpc_call *call)
*/
void rxrpc_kill_connection(struct rxrpc_connection *conn)
{
struct rxrpc_net *rxnet = conn->params.local->rxnet;
ASSERT(!rcu_access_pointer(conn->channels[0].call) &&
!rcu_access_pointer(conn->channels[1].call) &&
!rcu_access_pointer(conn->channels[2].call) &&
!rcu_access_pointer(conn->channels[3].call));
ASSERT(list_empty(&conn->cache_link));
write_lock(&rxrpc_connection_lock);
write_lock(&rxnet->conn_lock);
list_del_init(&conn->proc_link);
write_unlock(&rxrpc_connection_lock);
write_unlock(&rxnet->conn_lock);
/* Drain the Rx queue. Note that even though we've unpublished, an
* incoming packet could still be being added to our Rx queue, so we
@ -309,14 +304,17 @@ rxrpc_get_connection_maybe(struct rxrpc_connection *conn)
*/
void rxrpc_put_service_conn(struct rxrpc_connection *conn)
{
struct rxrpc_net *rxnet;
const void *here = __builtin_return_address(0);
int n;
n = atomic_dec_return(&conn->usage);
trace_rxrpc_conn(conn, rxrpc_conn_put_service, n, here);
ASSERTCMP(n, >=, 0);
if (n == 0)
rxrpc_queue_delayed_work(&rxrpc_connection_reap, 0);
if (n == 0) {
rxnet = conn->params.local->rxnet;
rxrpc_queue_delayed_work(&rxnet->service_conn_reaper, 0);
}
}
/*
@ -348,9 +346,12 @@ static void rxrpc_destroy_connection(struct rcu_head *rcu)
/*
* reap dead service connections
*/
static void rxrpc_connection_reaper(struct work_struct *work)
void rxrpc_service_connection_reaper(struct work_struct *work)
{
struct rxrpc_connection *conn, *_p;
struct rxrpc_net *rxnet =
container_of(to_delayed_work(work),
struct rxrpc_net, service_conn_reaper);
unsigned long reap_older_than, earliest, idle_timestamp, now;
LIST_HEAD(graveyard);
@ -361,8 +362,8 @@ static void rxrpc_connection_reaper(struct work_struct *work)
reap_older_than = now - rxrpc_connection_expiry * HZ;
earliest = ULONG_MAX;
write_lock(&rxrpc_connection_lock);
list_for_each_entry_safe(conn, _p, &rxrpc_connections, link) {
write_lock(&rxnet->conn_lock);
list_for_each_entry_safe(conn, _p, &rxnet->service_conns, link) {
ASSERTCMP(atomic_read(&conn->usage), >, 0);
if (likely(atomic_read(&conn->usage) > 1))
continue;
@ -393,12 +394,12 @@ static void rxrpc_connection_reaper(struct work_struct *work)
list_move_tail(&conn->link, &graveyard);
}
write_unlock(&rxrpc_connection_lock);
write_unlock(&rxnet->conn_lock);
if (earliest != ULONG_MAX) {
_debug("reschedule reaper %ld", (long) earliest - now);
ASSERT(time_after(earliest, now));
rxrpc_queue_delayed_work(&rxrpc_connection_reap,
rxrpc_queue_delayed_work(&rxnet->client_conn_reaper,
earliest - now);
}
@ -418,36 +419,30 @@ static void rxrpc_connection_reaper(struct work_struct *work)
* preemptively destroy all the service connection records rather than
* waiting for them to time out
*/
void __exit rxrpc_destroy_all_connections(void)
void rxrpc_destroy_all_connections(struct rxrpc_net *rxnet)
{
struct rxrpc_connection *conn, *_p;
bool leak = false;
_enter("");
rxrpc_destroy_all_client_connections();
rxrpc_destroy_all_client_connections(rxnet);
rxrpc_connection_expiry = 0;
cancel_delayed_work(&rxrpc_connection_reap);
rxrpc_queue_delayed_work(&rxrpc_connection_reap, 0);
cancel_delayed_work(&rxnet->client_conn_reaper);
rxrpc_queue_delayed_work(&rxnet->client_conn_reaper, 0);
flush_workqueue(rxrpc_workqueue);
write_lock(&rxrpc_connection_lock);
list_for_each_entry_safe(conn, _p, &rxrpc_connections, link) {
write_lock(&rxnet->conn_lock);
list_for_each_entry_safe(conn, _p, &rxnet->service_conns, link) {
pr_err("AF_RXRPC: Leaked conn %p {%d}\n",
conn, atomic_read(&conn->usage));
leak = true;
}
write_unlock(&rxrpc_connection_lock);
write_unlock(&rxnet->conn_lock);
BUG_ON(leak);
ASSERT(list_empty(&rxrpc_connection_proc_list));
/* Make sure the local and peer records pinned by any dying connections
* are released.
*/
rcu_barrier();
rxrpc_destroy_client_conn_ids();
ASSERT(list_empty(&rxnet->conn_proc_list));
_leave("");
}

11
net/rxrpc/conn_service.c
View file

@ -121,7 +121,8 @@ static void rxrpc_publish_service_conn(struct rxrpc_peer *peer,
* Preallocate a service connection. The connection is placed on the proc and
* reap lists so that we don't have to get the lock from BH context.
*/
struct rxrpc_connection *rxrpc_prealloc_service_connection(gfp_t gfp)
struct rxrpc_connection *rxrpc_prealloc_service_connection(struct rxrpc_net *rxnet,
gfp_t gfp)
{
struct rxrpc_connection *conn = rxrpc_alloc_connection(gfp);
@ -132,10 +133,10 @@ struct rxrpc_connection *rxrpc_prealloc_service_connection(gfp_t gfp)
conn->state = RXRPC_CONN_SERVICE_PREALLOC;
atomic_set(&conn->usage, 2);
write_lock(&rxrpc_connection_lock);
list_add_tail(&conn->link, &rxrpc_connections);
list_add_tail(&conn->proc_link, &rxrpc_connection_proc_list);
write_unlock(&rxrpc_connection_lock);
write_lock(&rxnet->conn_lock);
list_add_tail(&conn->link, &rxnet->service_conns);
list_add_tail(&conn->proc_link, &rxnet->conn_proc_list);
write_unlock(&rxnet->conn_lock);
trace_rxrpc_conn(conn, rxrpc_conn_new_service,
atomic_read(&conn->usage),

48
net/rxrpc/local_object.c
View file

@ -25,9 +25,6 @@
static void rxrpc_local_processor(struct work_struct *);
static void rxrpc_local_rcu(struct rcu_head *);
static DEFINE_MUTEX(rxrpc_local_mutex);
static LIST_HEAD(rxrpc_local_endpoints);
/*
* Compare a local to an address. Return -ve, 0 or +ve to indicate less than,
* same or greater than.
@ -77,13 +74,15 @@ static long rxrpc_local_cmp_key(const struct rxrpc_local *local,
/*
* Allocate a new local endpoint.
*/
static struct rxrpc_local *rxrpc_alloc_local(const struct sockaddr_rxrpc *srx)
static struct rxrpc_local *rxrpc_alloc_local(struct rxrpc_net *rxnet,
const struct sockaddr_rxrpc *srx)
{
struct rxrpc_local *local;
local = kzalloc(sizeof(struct rxrpc_local), GFP_KERNEL);
if (local) {
atomic_set(&local->usage, 1);
local->rxnet = rxnet;
INIT_LIST_HEAD(&local->link);
INIT_WORK(&local->processor, rxrpc_local_processor);
init_rwsem(&local->defrag_sem);
@ -105,7 +104,7 @@ static struct rxrpc_local *rxrpc_alloc_local(const struct sockaddr_rxrpc *srx)
* create the local socket
* - must be called with rxrpc_local_mutex locked
*/
static int rxrpc_open_socket(struct rxrpc_local *local)
static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net)
{
struct sock *sock;
int ret, opt;
@ -114,7 +113,7 @@ static int rxrpc_open_socket(struct rxrpc_local *local)
local, local->srx.transport_type, local->srx.transport.family);
/* create a socket to represent the local endpoint */
ret = sock_create_kern(&init_net, local->srx.transport.family,
ret = sock_create_kern(net, local->srx.transport.family,
local->srx.transport_type, 0, &local->socket);
if (ret < 0) {
_leave(" = %d [socket]", ret);
@ -172,9 +171,11 @@ static int rxrpc_open_socket(struct rxrpc_local *local)
/*
* Look up or create a new local endpoint using the specified local address.
*/
struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *srx)
struct rxrpc_local *rxrpc_lookup_local(struct net *net,
const struct sockaddr_rxrpc *srx)
{
struct rxrpc_local *local;
struct rxrpc_net *rxnet = rxrpc_net(net);
struct list_head *cursor;
const char *age;
long diff;
@ -183,10 +184,10 @@ struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *srx)
_enter("{%d,%d,%pISp}",
srx->transport_type, srx->transport.family, &srx->transport);
mutex_lock(&rxrpc_local_mutex);
mutex_lock(&rxnet->local_mutex);
for (cursor = rxrpc_local_endpoints.next;
cursor != &rxrpc_local_endpoints;
for (cursor = rxnet->local_endpoints.next;
cursor != &rxnet->local_endpoints;
cursor = cursor->next) {
local = list_entry(cursor, struct rxrpc_local, link);
@ -220,11 +221,11 @@ struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *srx)
goto found;
}
local = rxrpc_alloc_local(srx);
local = rxrpc_alloc_local(rxnet, srx);
if (!local)
goto nomem;
ret = rxrpc_open_socket(local);
ret = rxrpc_open_socket(local, net);
if (ret < 0)
goto sock_error;
@ -232,7 +233,7 @@ struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *srx)
age = "new";
found:
mutex_unlock(&rxrpc_local_mutex);
mutex_unlock(&rxnet->local_mutex);
_net("LOCAL %s %d {%pISp}",
age, local->debug_id, &local->srx.transport);
@ -243,13 +244,13 @@ struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *srx)
nomem:
ret = -ENOMEM;
sock_error:
mutex_unlock(&rxrpc_local_mutex);
mutex_unlock(&rxnet->local_mutex);
kfree(local);
_leave(" = %d", ret);
return ERR_PTR(ret);
addr_in_use:
mutex_unlock(&rxrpc_local_mutex);
mutex_unlock(&rxnet->local_mutex);
_leave(" = -EADDRINUSE");
return ERR_PTR(-EADDRINUSE);
}
@ -273,6 +274,7 @@ void __rxrpc_put_local(struct rxrpc_local *local)
static void rxrpc_local_destroyer(struct rxrpc_local *local)
{
struct socket *socket = local->socket;
struct rxrpc_net *rxnet = local->rxnet;
_enter("%d", local->debug_id);
@ -286,9 +288,9 @@ static void rxrpc_local_destroyer(struct rxrpc_local *local)
}
local->dead = true;
mutex_lock(&rxrpc_local_mutex);
mutex_lock(&rxnet->local_mutex);
list_del_init(&local->link);
mutex_unlock(&rxrpc_local_mutex);
mutex_unlock(&rxnet->local_mutex);
ASSERT(RB_EMPTY_ROOT(&local->client_conns));
ASSERT(!local->service);
@ -357,7 +359,7 @@ static void rxrpc_local_rcu(struct rcu_head *rcu)
/*
* Verify the local endpoint list is empty by this point.
*/
void __exit rxrpc_destroy_all_locals(void)
void rxrpc_destroy_all_locals(struct rxrpc_net *rxnet)
{
struct rxrpc_local *local;
@ -365,15 +367,13 @@ void __exit rxrpc_destroy_all_locals(void)
flush_workqueue(rxrpc_workqueue);
if (!list_empty(&rxrpc_local_endpoints)) {
mutex_lock(&rxrpc_local_mutex);
list_for_each_entry(local, &rxrpc_local_endpoints, link) {
if (!list_empty(&rxnet->local_endpoints)) {
mutex_lock(&rxnet->local_mutex);
list_for_each_entry(local, &rxnet->local_endpoints, link) {
pr_err("AF_RXRPC: Leaked local %p {%d}\n",
local, atomic_read(&local->usage));
}
mutex_unlock(&rxrpc_local_mutex);
mutex_unlock(&rxnet->local_mutex);
BUG();
}
rcu_barrier();
}

85
net/rxrpc/net_ns.c Normal file
View file

@ -0,0 +1,85 @@
/* rxrpc network namespace handling.
*
* Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#include <linux/proc_fs.h>
#include "ar-internal.h"
unsigned int rxrpc_net_id;
/*
* Initialise a per-network namespace record.
*/
static __net_init int rxrpc_init_net(struct net *net)
{
struct rxrpc_net *rxnet = rxrpc_net(net);
int ret;
get_random_bytes(&rxnet->epoch, sizeof(rxnet->epoch));
rxnet->epoch |= RXRPC_RANDOM_EPOCH;
INIT_LIST_HEAD(&rxnet->calls);
rwlock_init(&rxnet->call_lock);
INIT_LIST_HEAD(&rxnet->conn_proc_list);
INIT_LIST_HEAD(&rxnet->service_conns);
rwlock_init(&rxnet->conn_lock);
INIT_DELAYED_WORK(&rxnet->service_conn_reaper,
rxrpc_service_connection_reaper);
rxnet->nr_client_conns = 0;
rxnet->nr_active_client_conns = 0;
rxnet->kill_all_client_conns = false;
spin_lock_init(&rxnet->client_conn_cache_lock);
spin_lock_init(&rxnet->client_conn_discard_lock);
INIT_LIST_HEAD(&rxnet->waiting_client_conns);
INIT_LIST_HEAD(&rxnet->active_client_conns);
INIT_LIST_HEAD(&rxnet->idle_client_conns);
INIT_DELAYED_WORK(&rxnet->client_conn_reaper,
rxrpc_discard_expired_client_conns);
INIT_LIST_HEAD(&rxnet->local_endpoints);
mutex_init(&rxnet->local_mutex);
hash_init(rxnet->peer_hash);
spin_lock_init(&rxnet->peer_hash_lock);
ret = -ENOMEM;
rxnet->proc_net = proc_net_mkdir(net, "rxrpc", net->proc_net);
if (!rxnet->proc_net)
goto err_proc;
proc_create("calls", 0444, rxnet->proc_net, &rxrpc_call_seq_fops);
proc_create("conns", 0444, rxnet->proc_net, &rxrpc_connection_seq_fops);
return 0;
proc_remove(rxnet->proc_net);
err_proc:
return ret;
}
/*
* Clean up a per-network namespace record.
*/
static __net_exit void rxrpc_exit_net(struct net *net)
{
struct rxrpc_net *rxnet = rxrpc_net(net);
rxrpc_destroy_all_calls(rxnet);
rxrpc_destroy_all_connections(rxnet);
rxrpc_destroy_all_locals(rxnet);
proc_remove(rxnet->proc_net);
}
struct pernet_operations rxrpc_net_ops = {
.init = rxrpc_init_net,
.exit = rxrpc_exit_net,
.id = &rxrpc_net_id,
.size = sizeof(struct rxrpc_net),
};

26
net/rxrpc/peer_object.c
View file

@ -26,9 +26,6 @@
#include <net/ip6_route.h>
#include "ar-internal.h"
static DEFINE_HASHTABLE(rxrpc_peer_hash, 10);
static DEFINE_SPINLOCK(rxrpc_peer_hash_lock);
/*
* Hash a peer key.
*/
@ -124,8 +121,9 @@ static struct rxrpc_peer *__rxrpc_lookup_peer_rcu(
unsigned long hash_key)
{
struct rxrpc_peer *peer;
struct rxrpc_net *rxnet = local->rxnet;
hash_for_each_possible_rcu(rxrpc_peer_hash, peer, hash_link, hash_key) {
hash_for_each_possible_rcu(rxnet->peer_hash, peer, hash_link, hash_key) {
if (rxrpc_peer_cmp_key(peer, local, srx, hash_key) == 0) {
if (atomic_read(&peer->usage) == 0)
return NULL;
@ -301,13 +299,14 @@ struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *local,
struct rxrpc_peer *prealloc)
{
struct rxrpc_peer *peer;
struct rxrpc_net *rxnet = local->rxnet;
unsigned long hash_key;
hash_key = rxrpc_peer_hash_key(local, &prealloc->srx);
prealloc->local = local;
rxrpc_init_peer(prealloc, hash_key);
spin_lock(&rxrpc_peer_hash_lock);
spin_lock(&rxnet->peer_hash_lock);
/* Need to check that we aren't racing with someone else */
peer = __rxrpc_lookup_peer_rcu(local, &prealloc->srx, hash_key);
@ -315,10 +314,10 @@ struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *local,
peer = NULL;
if (!peer) {
peer = prealloc;
hash_add_rcu(rxrpc_peer_hash, &peer->hash_link, hash_key);
hash_add_rcu(rxnet->peer_hash, &peer->hash_link, hash_key);
}
spin_unlock(&rxrpc_peer_hash_lock);
spin_unlock(&rxnet->peer_hash_lock);
return peer;
}
@ -329,6 +328,7 @@ struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *local,
struct sockaddr_rxrpc *srx, gfp_t gfp)
{
struct rxrpc_peer *peer, *candidate;
struct rxrpc_net *rxnet = local->rxnet;
unsigned long hash_key = rxrpc_peer_hash_key(local, srx);
_enter("{%pISp}", &srx->transport);
@ -350,17 +350,17 @@ struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *local,
return NULL;
}
spin_lock_bh(&rxrpc_peer_hash_lock);
spin_lock_bh(&rxnet->peer_hash_lock);
/* Need to check that we aren't racing with someone else */
peer = __rxrpc_lookup_peer_rcu(local, srx, hash_key);
if (peer && !rxrpc_get_peer_maybe(peer))
peer = NULL;
if (!peer)
hash_add_rcu(rxrpc_peer_hash,
hash_add_rcu(rxnet->peer_hash,
&candidate->hash_link, hash_key);
spin_unlock_bh(&rxrpc_peer_hash_lock);
spin_unlock_bh(&rxnet->peer_hash_lock);
if (peer)
kfree(candidate);
@ -379,11 +379,13 @@ struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *local,
*/
void __rxrpc_put_peer(struct rxrpc_peer *peer)
{
struct rxrpc_net *rxnet = peer->local->rxnet;
ASSERT(hlist_empty(&peer->error_targets));
spin_lock_bh(&rxrpc_peer_hash_lock);
spin_lock_bh(&rxnet->peer_hash_lock);
hash_del_rcu(&peer->hash_link);
spin_unlock_bh(&rxrpc_peer_hash_lock);
spin_unlock_bh(&rxnet->peer_hash_lock);
kfree_rcu(peer, rcu);
}

40
net/rxrpc/proc.c
View file

@ -30,19 +30,25 @@ static const char *const rxrpc_conn_states[RXRPC_CONN__NR_STATES] = {
*/
static void *rxrpc_call_seq_start(struct seq_file *seq, loff_t *_pos)
{
struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
rcu_read_lock();
read_lock(&rxrpc_call_lock);
return seq_list_start_head(&rxrpc_calls, *_pos);
read_lock(&rxnet->call_lock);
return seq_list_start_head(&rxnet->calls, *_pos);
}
static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
return seq_list_next(v, &rxrpc_calls, pos);
struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
return seq_list_next(v, &rxnet->calls, pos);
}
static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
{
read_unlock(&rxrpc_call_lock);
struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
read_unlock(&rxnet->call_lock);
rcu_read_unlock();
}
@ -52,10 +58,11 @@ static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
struct rxrpc_sock *rx;
struct rxrpc_peer *peer;
struct rxrpc_call *call;
struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
rxrpc_seq_t tx_hard_ack, rx_hard_ack;
char lbuff[50], rbuff[50];
if (v == &rxrpc_calls) {
if (v == &rxnet->calls) {
seq_puts(seq,
"Proto Local "
" Remote "
@ -113,7 +120,8 @@ static const struct seq_operations rxrpc_call_seq_ops = {
static int rxrpc_call_seq_open(struct inode *inode, struct file *file)
{
return seq_open(file, &rxrpc_call_seq_ops);
return seq_open_net(inode, file, &rxrpc_call_seq_ops,
sizeof(struct seq_net_private));
}
const struct file_operations rxrpc_call_seq_fops = {
@ -129,27 +137,34 @@ const struct file_operations rxrpc_call_seq_fops = {
*/
static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
{
read_lock(&rxrpc_connection_lock);
return seq_list_start_head(&rxrpc_connection_proc_list, *_pos);
struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
read_lock(&rxnet->conn_lock);
return seq_list_start_head(&rxnet->conn_proc_list, *_pos);
}
static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
loff_t *pos)
{
return seq_list_next(v, &rxrpc_connection_proc_list, pos);
struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
return seq_list_next(v, &rxnet->conn_proc_list, pos);
}
static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
{
read_unlock(&rxrpc_connection_lock);
struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
read_unlock(&rxnet->conn_lock);
}
static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
{
struct rxrpc_connection *conn;
struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
char lbuff[50], rbuff[50];
if (v == &rxrpc_connection_proc_list) {
if (v == &rxnet->conn_proc_list) {
seq_puts(seq,
"Proto Local "
" Remote "
@ -197,7 +212,8 @@ static const struct seq_operations rxrpc_connection_seq_ops = {
static int rxrpc_connection_seq_open(struct inode *inode, struct file *file)
{
return seq_open(file, &rxrpc_connection_seq_ops);
return seq_open_net(inode, file, &rxrpc_connection_seq_ops,
sizeof(struct seq_net_private));
}
const struct file_operations rxrpc_connection_seq_fops = {