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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
Show 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 @@ error_key_type:
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 @@ error_0:
*/
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 @@ error:
/*
* 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 @@ idle_connection:
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 @@ next:
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 @@ not_yet_expired:
* 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 @@ out:
* 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 @@ replace_old_connection:
* 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 @@ error:
/*
* 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 @@ found:
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 = {