[PATCH v2 09/40] rxrpc, afs: Allow afs to pin rxrpc_peer objects

David Howells
2023-12-13T13:50:24Z

Change rxrpc's API such that:

(1) A new function, rxrpc_kernel_lookup_peer(), is provided to look up an
rxrpc_peer record for a remote address and a corresponding function,
rxrpc_kernel_put_peer(), is provided to dispose of it again.

(2) When setting up a call, the rxrpc_peer object used during a call is
now passed in rather than being set up by rxrpc_connect_call(). For
afs, this meenat passing it to rxrpc_kernel_begin_call() rather than
the full address (the service ID then has to be passed in as a
separate parameter).

(3) A new function, rxrpc_kernel_remote_addr(), is added so that afs can
get a pointer to the transport address for display purposed, and
another, rxrpc_kernel_remote_srx(), to gain a pointer to the full
rxrpc address.

(4) The function to retrieve the RTT from a call, rxrpc_kernel_get_srtt(),
is then altered to take a peer. This now returns the RTT or -1 if
there are insufficient samples.

(5) Rename rxrpc_kernel_get_peer() to rxrpc_kernel_call_get_peer().

(6) Provide a new function, rxrpc_kernel_get_peer(), to get a ref on a
peer the caller already has.

This allows the afs filesystem to pin the rxrpc_peer records that it is
using, allowing faster lookups and pointer comparisons rather than
comparing sockaddr_rxrpc contents. It also makes it easier to get hold of
the RTT. The following changes are made to afs:

(1) The addr_list struct's addrs[] elements now hold a peer struct pointer
and a service ID rather than a sockaddr_rxrpc.

(2) When displaying the transport address, rxrpc_kernel_remote_addr() is
used.

(3) The port arg is removed from afs_alloc_addrlist() since it's always
overridden.

(4) afs_merge_fs_addr4() and afs_merge_fs_addr6() do peer lookup and may
now return an error that must be handled.

(5) afs_find_server() now takes a peer pointer to specify the address.

(6) afs_find_server(), afs_compare_fs_alists() and afs_merge_fs_addr[46]{}
now do peer pointer comparison rather than address comparison.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
---

Notes:
Changes
=======
ver #2)
- Add a couple of missing symbol exports.

fs/afs/addr_list.c | 125 ++++++++++++++++++-----------------
fs/afs/cmservice.c | 5 +-
fs/afs/fs_probe.c | 11 +--
fs/afs/internal.h | 26 ++++----
fs/afs/proc.c | 9 +--
fs/afs/rotate.c | 6 +-
fs/afs/rxrpc.c | 10 +--
fs/afs/server.c | 41 ++----------
fs/afs/vl_alias.c | 55 +--------------
fs/afs/vl_list.c | 15 +++--
fs/afs/vl_probe.c | 12 ++--
fs/afs/vl_rotate.c | 6 +-
fs/afs/vlclient.c | 22 ++++--
include/net/af_rxrpc.h | 15 +++--
include/trace/events/rxrpc.h | 3 +
net/rxrpc/af_rxrpc.c | 62 ++++++++++++++---
net/rxrpc/ar-internal.h | 2 +-
net/rxrpc/call_object.c | 17 ++---
net/rxrpc/peer_object.c | 58 ++++++++++------
net/rxrpc/sendmsg.c | 11 ++-
20 files changed, 273 insertions(+), 238 deletions(-)

diff --git a/fs/afs/addr_list.c b/fs/afs/addr_list.c
index ac05a59e9d46..519821f5aedc 100644
--- a/fs/afs/addr_list.c
+++ b/fs/afs/addr_list.c
@@ -13,26 +13,33 @@
#include "internal.h"
#include "afs_fs.h"

+static void afs_free_addrlist(struct rcu_head *rcu)
+{
+ struct afs_addr_list *alist = container_of(rcu, struct afs_addr_list, rcu);
+ unsigned int i;
+
+ for (i = 0; i < alist->nr_addrs; i++)
+ rxrpc_kernel_put_peer(alist->addrs[i].peer);
+}
+
/*
* Release an address list.
*/
void afs_put_addrlist(struct afs_addr_list *alist)
{
if (alist && refcount_dec_and_test(&alist->usage))
- kfree_rcu(alist, rcu);
+ call_rcu(&alist->rcu, afs_free_addrlist);
}

/*
* Allocate an address list.
*/
-struct afs_addr_list *afs_alloc_addrlist(unsigned int nr,
- unsigned short service,
- unsigned short port)
+struct afs_addr_list *afs_alloc_addrlist(unsigned int nr, u16 service_id)
{
struct afs_addr_list *alist;
unsigned int i;

- _enter("%u,%u,%u", nr, service, port);
+ _enter("%u,%u", nr, service_id);

if (nr > AFS_MAX_ADDRESSES)
nr = AFS_MAX_ADDRESSES;
@@ -44,16 +51,8 @@ struct afs_addr_list *afs_alloc_addrlist(unsigned int nr,
refcount_set(&alist->usage, 1);
alist->max_addrs = nr;

- for (i = 0; i < nr; i++) {
- struct sockaddr_rxrpc *srx = &alist->addrs[i].srx;
- srx->srx_family = AF_RXRPC;
- srx->srx_service = service;
- srx->transport_type = SOCK_DGRAM;
- srx->transport_len = sizeof(srx->transport.sin6);
- srx->transport.sin6.sin6_family = AF_INET6;
- srx->transport.sin6.sin6_port = htons(port);
- }
-
+ for (i = 0; i < nr; i++)
+ alist->addrs[i].service_id = service_id;
return alist;
}

@@ -126,7 +125,7 @@ struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *net,
if (!vllist->servers[0].server)
goto error_vl;

- alist = afs_alloc_addrlist(nr, service, AFS_VL_PORT);
+ alist = afs_alloc_addrlist(nr, service);
if (!alist)
goto error;

@@ -197,9 +196,11 @@ struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *net,
}

if (family == AF_INET)
- afs_merge_fs_addr4(alist, x[0], xport);
+ ret = afs_merge_fs_addr4(net, alist, x[0], xport);
else
- afs_merge_fs_addr6(alist, x, xport);
+ ret = afs_merge_fs_addr6(net, alist, x, xport);
+ if (ret < 0)
+ goto error;

} while (p < end);

@@ -271,25 +272,33 @@ struct afs_vlserver_list *afs_dns_query(struct afs_cell *cell, time64_t *_expiry
/*
* Merge an IPv4 entry into a fileserver address list.
*/
-void afs_merge_fs_addr4(struct afs_addr_list *alist, __be32 xdr, u16 port)
+int afs_merge_fs_addr4(struct afs_net *net, struct afs_addr_list *alist,
+ __be32 xdr, u16 port)
{
- struct sockaddr_rxrpc *srx;
- u32 addr = ntohl(xdr);
+ struct sockaddr_rxrpc srx;
+ struct rxrpc_peer *peer;
int i;

if (alist->nr_addrs >= alist->max_addrs)
- return;
+ return 0;

- for (i = 0; i < alist->nr_ipv4; i++) {
- struct sockaddr_in *a = &alist->addrs[i].srx.transport.sin;
- u32 a_addr = ntohl(a->sin_addr.s_addr);
- u16 a_port = ntohs(a->sin_port);
+ srx.srx_family = AF_RXRPC;
+ srx.transport_type = SOCK_DGRAM;
+ srx.transport_len = sizeof(srx.transport.sin);
+ srx.transport.sin.sin_family = AF_INET;
+ srx.transport.sin.sin_port = htons(port);
+ srx.transport.sin.sin_addr.s_addr = xdr;

- if (addr == a_addr && port == a_port)
- return;
- if (addr == a_addr && port < a_port)
- break;
- if (addr < a_addr)
+ peer = rxrpc_kernel_lookup_peer(net->socket, &srx, GFP_KERNEL);
+ if (!peer)
+ return -ENOMEM;
+
+ for (i = 0; i < alist->nr_ipv4; i++) {
+ if (peer == alist->addrs[i].peer) {
+ rxrpc_kernel_put_peer(peer);
+ return 0;
+ }
+ if (peer <= alist->addrs[i].peer)
break;
}

@@ -298,38 +307,42 @@ void afs_merge_fs_addr4(struct afs_addr_list *alist, __be32 xdr, u16 port)
alist->addrs + i,
sizeof(alist->addrs[0]) * (alist->nr_addrs - i));

- srx = &alist->addrs[i].srx;
- srx->srx_family = AF_RXRPC;
- srx->transport_type = SOCK_DGRAM;
- srx->transport_len = sizeof(srx->transport.sin);
- srx->transport.sin.sin_family = AF_INET;
- srx->transport.sin.sin_port = htons(port);
- srx->transport.sin.sin_addr.s_addr = xdr;
+ alist->addrs[i].peer = peer;
alist->nr_ipv4++;
alist->nr_addrs++;
+ return 0;
}

/*
* Merge an IPv6 entry into a fileserver address list.
*/
-void afs_merge_fs_addr6(struct afs_addr_list *alist, __be32 *xdr, u16 port)
+int afs_merge_fs_addr6(struct afs_net *net, struct afs_addr_list *alist,
+ __be32 *xdr, u16 port)
{
- struct sockaddr_rxrpc *srx;
- int i, diff;
+ struct sockaddr_rxrpc srx;
+ struct rxrpc_peer *peer;
+ int i;

if (alist->nr_addrs >= alist->max_addrs)
- return;
+ return 0;

- for (i = alist->nr_ipv4; i < alist->nr_addrs; i++) {
- struct sockaddr_in6 *a = &alist->addrs[i].srx.transport.sin6;
- u16 a_port = ntohs(a->sin6_port);
+ srx.srx_family = AF_RXRPC;
+ srx.transport_type = SOCK_DGRAM;
+ srx.transport_len = sizeof(srx.transport.sin6);
+ srx.transport.sin6.sin6_family = AF_INET6;
+ srx.transport.sin6.sin6_port = htons(port);
+ memcpy(&srx.transport.sin6.sin6_addr, xdr, 16);

- diff = memcmp(xdr, &a->sin6_addr, 16);
- if (diff == 0 && port == a_port)
- return;
- if (diff == 0 && port < a_port)
- break;
- if (diff < 0)
+ peer = rxrpc_kernel_lookup_peer(net->socket, &srx, GFP_KERNEL);
+ if (!peer)
+ return -ENOMEM;
+
+ for (i = alist->nr_ipv4; i < alist->nr_addrs; i++) {
+ if (peer == alist->addrs[i].peer) {
+ rxrpc_kernel_put_peer(peer);
+ return 0;
+ }
+ if (peer <= alist->addrs[i].peer)
break;
}

@@ -337,15 +350,9 @@ void afs_merge_fs_addr6(struct afs_addr_list *alist, __be32 *xdr, u16 port)
memmove(alist->addrs + i + 1,
alist->addrs + i,
sizeof(alist->addrs[0]) * (alist->nr_addrs - i));
-
- srx = &alist->addrs[i].srx;
- srx->srx_family = AF_RXRPC;
- srx->transport_type = SOCK_DGRAM;
- srx->transport_len = sizeof(srx->transport.sin6);
- srx->transport.sin6.sin6_family = AF_INET6;
- srx->transport.sin6.sin6_port = htons(port);
- memcpy(&srx->transport.sin6.sin6_addr, xdr, 16);
+ alist->addrs[i].peer = peer;
alist->nr_addrs++;
+ return 0;
}

/*
diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c
index d4ddb20d6732..99a3f20bc786 100644
--- a/fs/afs/cmservice.c
+++ b/fs/afs/cmservice.c
@@ -146,10 +146,11 @@ static int afs_find_cm_server_by_peer(struct afs_call *call)
{
struct sockaddr_rxrpc srx;
struct afs_server *server;
+ struct rxrpc_peer *peer;

- rxrpc_kernel_get_peer(call->net->socket, call->rxcall, &srx);
+ peer = rxrpc_kernel_get_call_peer(call->net->socket, call->rxcall);

- server = afs_find_server(call->net, &srx);
+ server = afs_find_server(call->net, peer);
if (!server) {
trace_afs_cm_no_server(call, &srx);
return 0;
diff --git a/fs/afs/fs_probe.c b/fs/afs/fs_probe.c
index 3dd24842f277..58d28b82571e 100644
--- a/fs/afs/fs_probe.c
+++ b/fs/afs/fs_probe.c
@@ -101,6 +101,7 @@ static void afs_fs_probe_not_done(struct afs_net *net,
void afs_fileserver_probe_result(struct afs_call *call)
{
struct afs_addr_list *alist = call->alist;
+ struct afs_address *addr = &alist->addrs[call->addr_ix];
struct afs_server *server = call->server;
unsigned int index = call->addr_ix;
unsigned int rtt_us = 0, cap0;
@@ -153,12 +154,12 @@ void afs_fileserver_probe_result(struct afs_call *call)
if (call->service_id == YFS_FS_SERVICE) {
server->probe.is_yfs = true;
set_bit(AFS_SERVER_FL_IS_YFS, &server->flags);
- alist->addrs[index].srx.srx_service = call->service_id;
+ addr->service_id = call->service_id;
} else {
server->probe.not_yfs = true;
if (!server->probe.is_yfs) {
clear_bit(AFS_SERVER_FL_IS_YFS, &server->flags);
- alist->addrs[index].srx.srx_service = call->service_id;
+ addr->service_id = call->service_id;
}
cap0 = ntohl(call->tmp);
if (cap0 & AFS3_VICED_CAPABILITY_64BITFILES)
@@ -167,7 +168,7 @@ void afs_fileserver_probe_result(struct afs_call *call)
clear_bit(AFS_SERVER_FL_HAS_FS64, &server->flags);
}

- rxrpc_kernel_get_srtt(call->net->socket, call->rxcall, &rtt_us);
+ rtt_us = rxrpc_kernel_get_srtt(addr->peer);
if (rtt_us < server->probe.rtt) {
server->probe.rtt = rtt_us;
server->rtt = rtt_us;
@@ -181,8 +182,8 @@ void afs_fileserver_probe_result(struct afs_call *call)
out:
spin_unlock(&server->probe_lock);

- _debug("probe %pU [%u] %pISpc rtt=%u ret=%d",
- &server->uuid, index, &alist->addrs[index].srx.transport,
+ _debug("probe %pU [%u] %pISpc rtt=%d ret=%d",
+ &server->uuid, index, rxrpc_kernel_remote_addr(alist->addrs[index].peer),
rtt_us, ret);

return afs_done_one_fs_probe(call->net, server);
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index e2adb314ab6a..ec08b4a7e499 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -72,6 +72,11 @@ enum afs_call_state {
AFS_CALL_COMPLETE, /* Completed or failed */
};

+struct afs_address {
+ struct rxrpc_peer *peer;
+ u16 service_id;
+};
+
/*
* List of server addresses.
*/
@@ -87,9 +92,7 @@ struct afs_addr_list {
enum dns_lookup_status status:8;
unsigned long failed; /* Mask of addrs that failed locally/ICMP */
unsigned long responded; /* Mask of addrs that responded */
- struct {
- struct sockaddr_rxrpc srx;
- } addrs[] __counted_by(max_addrs);
+ struct afs_address addrs[] __counted_by(max_addrs);
#define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8))
};

@@ -420,7 +423,7 @@ struct afs_vlserver {
atomic_t probe_outstanding;
spinlock_t probe_lock;
struct {
- unsigned int rtt; /* RTT in uS */
+ unsigned int rtt; /* Best RTT in uS (or UINT_MAX) */
u32 abort_code;
short error;
unsigned short flags;
@@ -537,7 +540,7 @@ struct afs_server {
atomic_t probe_outstanding;
spinlock_t probe_lock;
struct {
- unsigned int rtt; /* RTT in uS */
+ unsigned int rtt; /* Best RTT in uS (or UINT_MAX) */
u32 abort_code;
short error;
bool responded:1;
@@ -964,9 +967,7 @@ static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist
refcount_inc(&alist->usage);
return alist;
}
-extern struct afs_addr_list *afs_alloc_addrlist(unsigned int,
- unsigned short,
- unsigned short);
+extern struct afs_addr_list *afs_alloc_addrlist(unsigned int nr, u16 service_id);
extern void afs_put_addrlist(struct afs_addr_list *);
extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *,
const char *, size_t, char,
@@ -977,8 +978,10 @@ extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *);
extern bool afs_iterate_addresses(struct afs_addr_cursor *);
extern int afs_end_cursor(struct afs_addr_cursor *);

-extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16);
-extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16);
+extern int afs_merge_fs_addr4(struct afs_net *net, struct afs_addr_list *addr,
+ __be32 xdr, u16 port);
+extern int afs_merge_fs_addr6(struct afs_net *net, struct afs_addr_list *addr,
+ __be32 *xdr, u16 port);

/*
* callback.c
@@ -1405,8 +1408,7 @@ extern void __exit afs_clean_up_permit_cache(void);
*/
extern spinlock_t afs_server_peer_lock;

-extern struct afs_server *afs_find_server(struct afs_net *,
- const struct sockaddr_rxrpc *);
+extern struct afs_server *afs_find_server(struct afs_net *, const struct rxrpc_peer *);
extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *);
extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32);
extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace);
diff --git a/fs/afs/proc.c b/fs/afs/proc.c
index ab9cd986cfd9..8a65a06908d2 100644
--- a/fs/afs/proc.c
+++ b/fs/afs/proc.c
@@ -307,7 +307,7 @@ static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v)
for (i = 0; i < alist->nr_addrs; i++)
seq_printf(m, " %c %pISpc\n",
alist->preferred == i ? '>' : '-',
- &alist->addrs[i].srx.transport);
+ rxrpc_kernel_remote_addr(alist->addrs[i].peer));
}
seq_printf(m, " info: fl=%lx rtt=%d\n", vlserver->flags, vlserver->rtt);
seq_printf(m, " probe: fl=%x e=%d ac=%d out=%d\n",
@@ -398,9 +398,10 @@ static int afs_proc_servers_show(struct seq_file *m, void *v)
seq_printf(m, " - ALIST v=%u rsp=%lx f=%lx\n",
alist->version, alist->responded, alist->failed);
for (i = 0; i < alist->nr_addrs; i++)
- seq_printf(m, " [%x] %pISpc%s\n",
- i, &alist->addrs[i].srx.transport,
- alist->preferred == i ? "*" : "");
+ seq_printf(m, " [%x] %pISpc%s rtt=%d\n",
+ i, rxrpc_kernel_remote_addr(alist->addrs[i].peer),
+ alist->preferred == i ? "*" : "",
+ rxrpc_kernel_get_srtt(alist->addrs[i].peer));
return 0;
}

diff --git a/fs/afs/rotate.c b/fs/afs/rotate.c
index 46081e5da6f5..59aed7a6dd11 100644
--- a/fs/afs/rotate.c
+++ b/fs/afs/rotate.c
@@ -113,7 +113,7 @@ bool afs_select_fileserver(struct afs_operation *op)
struct afs_server *server;
struct afs_vnode *vnode = op->file[0].vnode;
struct afs_error e;
- u32 rtt;
+ unsigned int rtt;
int error = op->ac.error, i;

_enter("%lx[%d],%lx[%d],%d,%d",
@@ -420,7 +420,7 @@ bool afs_select_fileserver(struct afs_operation *op)
}

op->index = -1;
- rtt = U32_MAX;
+ rtt = UINT_MAX;
for (i = 0; i < op->server_list->nr_servers; i++) {
struct afs_server *s = op->server_list->servers[i].server;

@@ -488,7 +488,7 @@ bool afs_select_fileserver(struct afs_operation *op)

_debug("address [%u] %u/%u %pISp",
op->index, op->ac.index, op->ac.alist->nr_addrs,
- &op->ac.alist->addrs[op->ac.index].srx.transport);
+ rxrpc_kernel_remote_addr(op->ac.alist->addrs[op->ac.index].peer));

_leave(" = t");
return true;
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index 181317126e43..2603db03b7ff 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -296,7 +296,8 @@ static void afs_notify_end_request_tx(struct sock *sock,
*/
void afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call, gfp_t gfp)
{
- struct sockaddr_rxrpc *srx = &ac->alist->addrs[ac->index].srx;
+ struct afs_address *addr = &ac->alist->addrs[ac->index];
+ struct rxrpc_peer *peer = addr->peer;
struct rxrpc_call *rxcall;
struct msghdr msg;
struct kvec iov[1];
@@ -304,7 +305,7 @@ void afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call, gfp_t gfp)
s64 tx_total_len;
int ret;

- _enter(",{%pISp},", &srx->transport);
+ _enter(",{%pISp},", rxrpc_kernel_remote_addr(addr->peer));

ASSERT(call->type != NULL);
ASSERT(call->type->name != NULL);
@@ -333,7 +334,7 @@ void afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call, gfp_t gfp)
}

/* create a call */
- rxcall = rxrpc_kernel_begin_call(call->net->socket, srx, call->key,
+ rxcall = rxrpc_kernel_begin_call(call->net->socket, peer, call->key,
(unsigned long)call,
tx_total_len,
call->max_lifespan,
@@ -341,6 +342,7 @@ void afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call, gfp_t gfp)
(call->async ?
afs_wake_up_async_call :
afs_wake_up_call_waiter),
+ addr->service_id,
call->upgrade,
(call->intr ? RXRPC_PREINTERRUPTIBLE :
RXRPC_UNINTERRUPTIBLE),
@@ -461,7 +463,7 @@ static void afs_log_error(struct afs_call *call, s32 remote_abort)
max = m + 1;
pr_notice("kAFS: Peer reported %s failure on %s [%pISp]\n",
msg, call->type->name,
- &call->alist->addrs[call->addr_ix].srx.transport);
+ rxrpc_kernel_remote_addr(call->alist->addrs[call->addr_ix].peer));
}
}

diff --git a/fs/afs/server.c b/fs/afs/server.c
index b8e2d211d4a1..5b5fa94005c9 100644
--- a/fs/afs/server.c
+++ b/fs/afs/server.c
@@ -21,13 +21,12 @@ static void __afs_put_server(struct afs_net *, struct afs_server *);
/*
* Find a server by one of its addresses.
*/
-struct afs_server *afs_find_server(struct afs_net *net,
- const struct sockaddr_rxrpc *srx)
+struct afs_server *afs_find_server(struct afs_net *net, const struct rxrpc_peer *peer)
{
const struct afs_addr_list *alist;
struct afs_server *server = NULL;
unsigned int i;
- int seq = 1, diff;
+ int seq = 1;

rcu_read_lock();

@@ -38,37 +37,11 @@ struct afs_server *afs_find_server(struct afs_net *net,
seq++; /* 2 on the 1st/lockless path, otherwise odd */
read_seqbegin_or_lock(&net->fs_addr_lock, &seq);

- if (srx->transport.family == AF_INET6) {
- const struct sockaddr_in6 *a = &srx->transport.sin6, *b;
- hlist_for_each_entry_rcu(server, &net->fs_addresses6, addr6_link) {
- alist = rcu_dereference(server->addresses);
- for (i = alist->nr_ipv4; i < alist->nr_addrs; i++) {
- b = &alist->addrs[i].srx.transport.sin6;
- diff = ((u16 __force)a->sin6_port -
- (u16 __force)b->sin6_port);
- if (diff == 0)
- diff = memcmp(&a->sin6_addr,
- &b->sin6_addr,
- sizeof(struct in6_addr));
- if (diff == 0)
- goto found;
- }
- }
- } else {
- const struct sockaddr_in *a = &srx->transport.sin, *b;
- hlist_for_each_entry_rcu(server, &net->fs_addresses4, addr4_link) {
- alist = rcu_dereference(server->addresses);
- for (i = 0; i < alist->nr_ipv4; i++) {
- b = &alist->addrs[i].srx.transport.sin;
- diff = ((u16 __force)a->sin_port -
- (u16 __force)b->sin_port);
- if (diff == 0)
- diff = ((u32 __force)a->sin_addr.s_addr -
- (u32 __force)b->sin_addr.s_addr);
- if (diff == 0)
- goto found;
- }
- }
+ hlist_for_each_entry_rcu(server, &net->fs_addresses6, addr6_link) {
+ alist = rcu_dereference(server->addresses);
+ for (i = 0; i < alist->nr_addrs; i++)
+ if (alist->addrs[i].peer == peer)
+ goto found;
}

server = NULL;
diff --git a/fs/afs/vl_alias.c b/fs/afs/vl_alias.c
index d3c0df70a1a5..6fdf9f1bedc0 100644
--- a/fs/afs/vl_alias.c
+++ b/fs/afs/vl_alias.c
@@ -32,55 +32,6 @@ static struct afs_volume *afs_sample_volume(struct afs_cell *cell, struct key *k
return volume;
}

-/*
- * Compare two addresses.
- */
-static int afs_compare_addrs(const struct sockaddr_rxrpc *srx_a,
- const struct sockaddr_rxrpc *srx_b)
-{
- short port_a, port_b;
- int addr_a, addr_b, diff;
-
- diff = (short)srx_a->transport_type - (short)srx_b->transport_type;
- if (diff)
- goto out;
-
- switch (srx_a->transport_type) {
- case AF_INET: {
- const struct sockaddr_in *a = &srx_a->transport.sin;
- const struct sockaddr_in *b = &srx_b->transport.sin;
- addr_a = ntohl(a->sin_addr.s_addr);
- addr_b = ntohl(b->sin_addr.s_addr);
- diff = addr_a - addr_b;
- if (diff == 0) {
- port_a = ntohs(a->sin_port);
- port_b = ntohs(b->sin_port);
- diff = port_a - port_b;
- }
- break;
- }
-
- case AF_INET6: {
- const struct sockaddr_in6 *a = &srx_a->transport.sin6;
- const struct sockaddr_in6 *b = &srx_b->transport.sin6;
- diff = memcmp(&a->sin6_addr, &b->sin6_addr, 16);
- if (diff == 0) {
- port_a = ntohs(a->sin6_port);
- port_b = ntohs(b->sin6_port);
- diff = port_a - port_b;
- }
- break;
- }
-
- default:
- WARN_ON(1);
- diff = 1;
- }
-
-out:
- return diff;
-}
-
/*
* Compare the address lists of a pair of fileservers.
*/
@@ -94,9 +45,9 @@ static int afs_compare_fs_alists(const struct afs_server *server_a,
lb = rcu_dereference(server_b->addresses);

while (a < la->nr_addrs && b < lb->nr_addrs) {
- const struct sockaddr_rxrpc *srx_a = &la->addrs[a].srx;
- const struct sockaddr_rxrpc *srx_b = &lb->addrs[b].srx;
- int diff = afs_compare_addrs(srx_a, srx_b);
+ unsigned long pa = (unsigned long)la->addrs[a].peer;
+ unsigned long pb = (unsigned long)lb->addrs[b].peer;
+ long diff = pa - pb;

if (diff < 0) {
a++;
diff --git a/fs/afs/vl_list.c b/fs/afs/vl_list.c
index acc48216136a..ba89140eee9e 100644
--- a/fs/afs/vl_list.c
+++ b/fs/afs/vl_list.c
@@ -83,14 +83,15 @@ static u16 afs_extract_le16(const u8 **_b)
/*
* Build a VL server address list from a DNS queried server list.
*/
-static struct afs_addr_list *afs_extract_vl_addrs(const u8 **_b, const u8 *end,
+static struct afs_addr_list *afs_extract_vl_addrs(struct afs_net *net,
+ const u8 **_b, const u8 *end,
u8 nr_addrs, u16 port)
{
struct afs_addr_list *alist;
const u8 *b = *_b;
int ret = -EINVAL;

- alist = afs_alloc_addrlist(nr_addrs, VL_SERVICE, port);
+ alist = afs_alloc_addrlist(nr_addrs, VL_SERVICE);
if (!alist)
return ERR_PTR(-ENOMEM);
if (nr_addrs == 0)
@@ -109,7 +110,9 @@ static struct afs_addr_list *afs_extract_vl_addrs(const u8 **_b, const u8 *end,
goto error;
}
memcpy(x, b, 4);
- afs_merge_fs_addr4(alist, x[0], port);
+ ret = afs_merge_fs_addr4(net, alist, x[0], port);
+ if (ret < 0)
+ goto error;
b += 4;
break;

@@ -119,7 +122,9 @@ static struct afs_addr_list *afs_extract_vl_addrs(const u8 **_b, const u8 *end,
goto error;
}
memcpy(x, b, 16);
- afs_merge_fs_addr6(alist, x, port);
+ ret = afs_merge_fs_addr6(net, alist, x, port);
+ if (ret < 0)
+ goto error;
b += 16;
break;

@@ -247,7 +252,7 @@ struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *cell,
/* Extract the addresses - note that we can't skip this as we
* have to advance the payload pointer.
*/
- addrs = afs_extract_vl_addrs(&b, end, bs.nr_addrs, bs.port);
+ addrs = afs_extract_vl_addrs(cell->net, &b, end, bs.nr_addrs, bs.port);
if (IS_ERR(addrs)) {
ret = PTR_ERR(addrs);
goto error_2;
diff --git a/fs/afs/vl_probe.c b/fs/afs/vl_probe.c
index bdd9372e3fb2..9551aef07cee 100644
--- a/fs/afs/vl_probe.c
+++ b/fs/afs/vl_probe.c
@@ -48,6 +48,7 @@ void afs_vlserver_probe_result(struct afs_call *call)
{
struct afs_addr_list *alist = call->alist;
struct afs_vlserver *server = call->vlserver;
+ struct afs_address *addr = &alist->addrs[call->addr_ix];
unsigned int server_index = call->server_index;
unsigned int rtt_us = 0;
unsigned int index = call->addr_ix;
@@ -106,16 +107,16 @@ void afs_vlserver_probe_result(struct afs_call *call)
if (call->service_id == YFS_VL_SERVICE) {
server->probe.flags |= AFS_VLSERVER_PROBE_IS_YFS;
set_bit(AFS_VLSERVER_FL_IS_YFS, &server->flags);
- alist->addrs[index].srx.srx_service = call->service_id;
+ addr->service_id = call->service_id;
} else {
server->probe.flags |= AFS_VLSERVER_PROBE_NOT_YFS;
if (!(server->probe.flags & AFS_VLSERVER_PROBE_IS_YFS)) {
clear_bit(AFS_VLSERVER_FL_IS_YFS, &server->flags);
- alist->addrs[index].srx.srx_service = call->service_id;
+ addr->service_id = call->service_id;
}
}

- rxrpc_kernel_get_srtt(call->net->socket, call->rxcall, &rtt_us);
+ rtt_us = rxrpc_kernel_get_srtt(addr->peer);
if (rtt_us < server->probe.rtt) {
server->probe.rtt = rtt_us;
server->rtt = rtt_us;
@@ -130,8 +131,9 @@ void afs_vlserver_probe_result(struct afs_call *call)
out:
spin_unlock(&server->probe_lock);

- _debug("probe [%u][%u] %pISpc rtt=%u ret=%d",
- server_index, index, &alist->addrs[index].srx.transport, rtt_us, ret);
+ _debug("probe [%u][%u] %pISpc rtt=%d ret=%d",
+ server_index, index, rxrpc_kernel_remote_addr(addr->peer),
+ rtt_us, ret);

afs_done_one_vl_probe(server, have_result);
}
diff --git a/fs/afs/vl_rotate.c b/fs/afs/vl_rotate.c
index e52b9d4c8a0a..f8f255c966ae 100644
--- a/fs/afs/vl_rotate.c
+++ b/fs/afs/vl_rotate.c
@@ -92,7 +92,7 @@ bool afs_select_vlserver(struct afs_vl_cursor *vc)
struct afs_addr_list *alist;
struct afs_vlserver *vlserver;
struct afs_error e;
- u32 rtt;
+ unsigned int rtt;
int error = vc->ac.error, i;

_enter("%lx[%d],%lx[%d],%d,%d",
@@ -194,7 +194,7 @@ bool afs_select_vlserver(struct afs_vl_cursor *vc)
goto selected_server;

vc->index = -1;
- rtt = U32_MAX;
+ rtt = UINT_MAX;
for (i = 0; i < vc->server_list->nr_servers; i++) {
struct afs_vlserver *s = vc->server_list->servers[i].server;

@@ -249,7 +249,7 @@ bool afs_select_vlserver(struct afs_vl_cursor *vc)

_debug("VL address %d/%d", vc->ac.index, vc->ac.alist->nr_addrs);

- _leave(" = t %pISpc", &vc->ac.alist->addrs[vc->ac.index].srx.transport);
+ _leave(" = t %pISpc", rxrpc_kernel_remote_addr(vc->ac.alist->addrs[vc->ac.index].peer));
return true;

next_server:
diff --git a/fs/afs/vlclient.c b/fs/afs/vlclient.c
index 00fca3c66ba6..41e7932d75c6 100644
--- a/fs/afs/vlclient.c
+++ b/fs/afs/vlclient.c
@@ -208,7 +208,7 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
count = ntohl(*bp);

nentries = min(nentries, count);
- alist = afs_alloc_addrlist(nentries, FS_SERVICE, AFS_FS_PORT);
+ alist = afs_alloc_addrlist(nentries, FS_SERVICE);
if (!alist)
return -ENOMEM;
alist->version = uniquifier;
@@ -230,9 +230,13 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
alist = call->ret_alist;
bp = call->buffer;
count = min(call->count, 4U);
- for (i = 0; i < count; i++)
- if (alist->nr_addrs < call->count2)
- afs_merge_fs_addr4(alist, *bp++, AFS_FS_PORT);
+ for (i = 0; i < count; i++) {
+ if (alist->nr_addrs < call->count2) {
+ ret = afs_merge_fs_addr4(call->net, alist, *bp++, AFS_FS_PORT);
+ if (ret < 0)
+ return ret;
+ }
+ }

call->count -= count;
if (call->count > 0)
@@ -450,7 +454,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
if (call->count > YFS_MAXENDPOINTS)
return afs_protocol_error(call, afs_eproto_yvl_fsendpt_num);

- alist = afs_alloc_addrlist(call->count, FS_SERVICE, AFS_FS_PORT);
+ alist = afs_alloc_addrlist(call->count, FS_SERVICE);
if (!alist)
return -ENOMEM;
alist->version = uniquifier;
@@ -488,14 +492,18 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
if (ntohl(bp[0]) != sizeof(__be32) * 2)
return afs_protocol_error(
call, afs_eproto_yvl_fsendpt4_len);
- afs_merge_fs_addr4(alist, bp[1], ntohl(bp[2]));
+ ret = afs_merge_fs_addr4(call->net, alist, bp[1], ntohl(bp[2]));
+ if (ret < 0)
+ return ret;
bp += 3;
break;
case YFS_ENDPOINT_IPV6:
if (ntohl(bp[0]) != sizeof(__be32) * 5)
return afs_protocol_error(
call, afs_eproto_yvl_fsendpt6_len);
- afs_merge_fs_addr6(alist, bp + 1, ntohl(bp[5]));
+ ret = afs_merge_fs_addr6(call->net, alist, bp + 1, ntohl(bp[5]));
+ if (ret < 0)
+ return ret;
bp += 6;
break;
default:
diff --git a/include/net/af_rxrpc.h b/include/net/af_rxrpc.h
index 5531dd08061e..0754c463224a 100644
--- a/include/net/af_rxrpc.h
+++ b/include/net/af_rxrpc.h
@@ -15,6 +15,7 @@ struct key;
struct sock;
struct socket;
struct rxrpc_call;
+struct rxrpc_peer;
enum rxrpc_abort_reason;

enum rxrpc_interruptibility {
@@ -41,13 +42,14 @@ void rxrpc_kernel_new_call_notification(struct socket *,
rxrpc_notify_new_call_t,
rxrpc_discard_new_call_t);
struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
- struct sockaddr_rxrpc *srx,
+ struct rxrpc_peer *peer,
struct key *key,
unsigned long user_call_ID,
s64 tx_total_len,
u32 hard_timeout,
gfp_t gfp,
rxrpc_notify_rx_t notify_rx,
+ u16 service_id,
bool upgrade,
enum rxrpc_interruptibility interruptibility,
unsigned int debug_id);
@@ -60,9 +62,14 @@ bool rxrpc_kernel_abort_call(struct socket *, struct rxrpc_call *,
u32, int, enum rxrpc_abort_reason);
void rxrpc_kernel_shutdown_call(struct socket *sock, struct rxrpc_call *call);
void rxrpc_kernel_put_call(struct socket *sock, struct rxrpc_call *call);
-void rxrpc_kernel_get_peer(struct socket *, struct rxrpc_call *,
- struct sockaddr_rxrpc *);
-bool rxrpc_kernel_get_srtt(struct socket *, struct rxrpc_call *, u32 *);
+struct rxrpc_peer *rxrpc_kernel_lookup_peer(struct socket *sock,
+ struct sockaddr_rxrpc *srx, gfp_t gfp);
+void rxrpc_kernel_put_peer(struct rxrpc_peer *peer);
+struct rxrpc_peer *rxrpc_kernel_get_peer(struct rxrpc_peer *peer);
+struct rxrpc_peer *rxrpc_kernel_get_call_peer(struct socket *sock, struct rxrpc_call *call);
+const struct sockaddr_rxrpc *rxrpc_kernel_remote_srx(const struct rxrpc_peer *peer);
+const struct sockaddr *rxrpc_kernel_remote_addr(const struct rxrpc_peer *peer);
+unsigned int rxrpc_kernel_get_srtt(const struct rxrpc_peer *);
int rxrpc_kernel_charge_accept(struct socket *, rxrpc_notify_rx_t,
rxrpc_user_attach_call_t, unsigned long, gfp_t,
unsigned int);
diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h
index f7e537f64db4..4c1ef7b3705c 100644
--- a/include/trace/events/rxrpc.h
+++ b/include/trace/events/rxrpc.h
@@ -178,7 +178,9 @@
#define rxrpc_peer_traces \
EM(rxrpc_peer_free, "FREE ") \
EM(rxrpc_peer_get_accept, "GET accept ") \
+ EM(rxrpc_peer_get_application, "GET app ") \
EM(rxrpc_peer_get_bundle, "GET bundle ") \
+ EM(rxrpc_peer_get_call, "GET call ") \
EM(rxrpc_peer_get_client_conn, "GET cln-conn") \
EM(rxrpc_peer_get_input, "GET input ") \
EM(rxrpc_peer_get_input_error, "GET inpt-err") \
@@ -187,6 +189,7 @@
EM(rxrpc_peer_get_service_conn, "GET srv-conn") \
EM(rxrpc_peer_new_client, "NEW client ") \
EM(rxrpc_peer_new_prealloc, "NEW prealloc") \
+ EM(rxrpc_peer_put_application, "PUT app ") \
EM(rxrpc_peer_put_bundle, "PUT bundle ") \
EM(rxrpc_peer_put_call, "PUT call ") \
EM(rxrpc_peer_put_conn, "PUT conn ") \
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index fa8aec78f63d..465bfe5eb061 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -258,16 +258,62 @@ static int rxrpc_listen(struct socket *sock, int backlog)
return ret;
}

+/**
+ * rxrpc_kernel_lookup_peer - Obtain remote transport endpoint for an address
+ * @sock: The socket through which it will be accessed
+ * @srx: The network address
+ * @gfp: Allocation flags
+ *
+ * Lookup or create a remote transport endpoint record for the specified
+ * address and return it with a ref held.
+ */
+struct rxrpc_peer *rxrpc_kernel_lookup_peer(struct socket *sock,
+ struct sockaddr_rxrpc *srx, gfp_t gfp)
+{
+ struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
+ int ret;
+
+ ret = rxrpc_validate_address(rx, srx, sizeof(*srx));
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ return rxrpc_lookup_peer(rx->local, srx, gfp);
+}
+EXPORT_SYMBOL(rxrpc_kernel_lookup_peer);
+
+/**
+ * rxrpc_kernel_get_peer - Get a reference on a peer
+ * @peer: The peer to get a reference on.
+ *
+ * Get a record for the remote peer in a call.
+ */
+struct rxrpc_peer *rxrpc_kernel_get_peer(struct rxrpc_peer *peer)
+{
+ return peer ? rxrpc_get_peer(peer, rxrpc_peer_get_application) : NULL;
+}
+EXPORT_SYMBOL(rxrpc_kernel_get_peer);
+
+/**
+ * rxrpc_kernel_put_peer - Allow a kernel app to drop a peer reference
+ * @peer: The peer to drop a ref on
+ */
+void rxrpc_kernel_put_peer(struct rxrpc_peer *peer)
+{
+ rxrpc_put_peer(peer, rxrpc_peer_put_application);
+}
+EXPORT_SYMBOL(rxrpc_kernel_put_peer);
+
/**
* rxrpc_kernel_begin_call - Allow a kernel service to begin a call
* @sock: The socket on which to make the call
- * @srx: The address of the peer to contact
+ * @peer: The peer to contact
* @key: The security context to use (defaults to socket setting)
* @user_call_ID: The ID to use
* @tx_total_len: Total length of data to transmit during the call (or -1)
* @hard_timeout: The maximum lifespan of the call in sec
* @gfp: The allocation constraints
* @notify_rx: Where to send notifications instead of socket queue
+ * @service_id: The ID of the service to contact
* @upgrade: Request service upgrade for call
* @interruptibility: The call is interruptible, or can be canceled.
* @debug_id: The debug ID for tracing to be assigned to the call
@@ -280,13 +326,14 @@ static int rxrpc_listen(struct socket *sock, int backlog)
* supplying @srx and @key.
*/
struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
- struct sockaddr_rxrpc *srx,
+ struct rxrpc_peer *peer,
struct key *key,
unsigned long user_call_ID,
s64 tx_total_len,
u32 hard_timeout,
gfp_t gfp,
rxrpc_notify_rx_t notify_rx,
+ u16 service_id,
bool upgrade,
enum rxrpc_interruptibility interruptibility,
unsigned int debug_id)
@@ -295,13 +342,11 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
struct rxrpc_call_params p;
struct rxrpc_call *call;
struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
- int ret;

_enter(",,%x,%lx", key_serial(key), user_call_ID);

- ret = rxrpc_validate_address(rx, srx, sizeof(*srx));
- if (ret < 0)
- return ERR_PTR(ret);
+ if (WARN_ON_ONCE(peer->local != rx->local))
+ return ERR_PTR(-EIO);

lock_sock(&rx->sk);

@@ -319,12 +364,13 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,

memset(&cp, 0, sizeof(cp));
cp.local = rx->local;
+ cp.peer = peer;
cp.key = key;
cp.security_level = rx->min_sec_level;
cp.exclusive = false;
cp.upgrade = upgrade;
- cp.service_id = srx->srx_service;
- call = rxrpc_new_client_call(rx, &cp, srx, &p, gfp, debug_id);
+ cp.service_id = service_id;
+ call = rxrpc_new_client_call(rx, &cp, &p, gfp, debug_id);
/* The socket has been unlocked. */
if (!IS_ERR(call)) {
call->notify_rx = notify_rx;
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index e8e14c6f904d..8eea7a487380 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -364,6 +364,7 @@ struct rxrpc_conn_proto {

struct rxrpc_conn_parameters {
struct rxrpc_local *local; /* Representation of local endpoint */
+ struct rxrpc_peer *peer; /* Representation of remote endpoint */
struct key *key; /* Security details */
bool exclusive; /* T if conn is exclusive */
bool upgrade; /* T if service ID can be upgraded */
@@ -867,7 +868,6 @@ struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long
struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *, gfp_t, unsigned int);
struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
struct rxrpc_conn_parameters *,
- struct sockaddr_rxrpc *,
struct rxrpc_call_params *, gfp_t,
unsigned int);
void rxrpc_start_call_timer(struct rxrpc_call *call);
diff --git a/net/rxrpc/call_object.c b/net/rxrpc/call_object.c
index 773eecd1e979..beea25ac88f5 100644
--- a/net/rxrpc/call_object.c
+++ b/net/rxrpc/call_object.c
@@ -193,7 +193,6 @@ struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp,
* Allocate a new client call.
*/
static struct rxrpc_call *rxrpc_alloc_client_call(struct rxrpc_sock *rx,
- struct sockaddr_rxrpc *srx,
struct rxrpc_conn_parameters *cp,
struct rxrpc_call_params *p,
gfp_t gfp,
@@ -211,10 +210,12 @@ static struct rxrpc_call *rxrpc_alloc_client_call(struct rxrpc_sock *rx,
now = ktime_get_real();
call->acks_latest_ts = now;
call->cong_tstamp = now;
- call->dest_srx = *srx;
+ call->dest_srx = cp->peer->srx;
+ call->dest_srx.srx_service = cp->service_id;
call->interruptibility = p->interruptibility;
call->tx_total_len = p->tx_total_len;
call->key = key_get(cp->key);
+ call->peer = rxrpc_get_peer(cp->peer, rxrpc_peer_get_call);
call->local = rxrpc_get_local(cp->local, rxrpc_local_get_call);
call->security_level = cp->security_level;
if (p->kernel)
@@ -306,10 +307,6 @@ static int rxrpc_connect_call(struct rxrpc_call *call, gfp_t gfp)

_enter("{%d,%lx},", call->debug_id, call->user_call_ID);

- call->peer = rxrpc_lookup_peer(local, &call->dest_srx, gfp);
- if (!call->peer)
- goto error;
-
ret = rxrpc_look_up_bundle(call, gfp);
if (ret < 0)
goto error;
@@ -334,7 +331,6 @@ static int rxrpc_connect_call(struct rxrpc_call *call, gfp_t gfp)
*/
struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,
struct rxrpc_conn_parameters *cp,
- struct sockaddr_rxrpc *srx,
struct rxrpc_call_params *p,
gfp_t gfp,
unsigned int debug_id)
@@ -349,13 +345,18 @@ struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *rx,

_enter("%p,%lx", rx, p->user_call_ID);

+ if (WARN_ON_ONCE(!cp->peer)) {
+ release_sock(&rx->sk);
+ return ERR_PTR(-EIO);
+ }
+
limiter = rxrpc_get_call_slot(p, gfp);
if (!limiter) {
release_sock(&rx->sk);
return ERR_PTR(-ERESTARTSYS);
}

- call = rxrpc_alloc_client_call(rx, srx, cp, p, gfp, debug_id);
+ call = rxrpc_alloc_client_call(rx, cp, p, gfp, debug_id);
if (IS_ERR(call)) {
release_sock(&rx->sk);
up(limiter);
diff --git a/net/rxrpc/peer_object.c b/net/rxrpc/peer_object.c
index 8d7a715a0bb1..49dcda67a0d5 100644
--- a/net/rxrpc/peer_object.c
+++ b/net/rxrpc/peer_object.c
@@ -22,6 +22,8 @@
#include <net/ip6_route.h>
#include "ar-internal.h"

+static const struct sockaddr_rxrpc rxrpc_null_addr;
+
/*
* Hash a peer key.
*/
@@ -457,39 +459,53 @@ void rxrpc_destroy_all_peers(struct rxrpc_net *rxnet)
}

/**
- * rxrpc_kernel_get_peer - Get the peer address of a call
+ * rxrpc_kernel_get_call_peer - Get the peer address of a call
* @sock: The socket on which the call is in progress.
* @call: The call to query
- * @_srx: Where to place the result
*
- * Get the address of the remote peer in a call.
+ * Get a record for the remote peer in a call.
*/
-void rxrpc_kernel_get_peer(struct socket *sock, struct rxrpc_call *call,
- struct sockaddr_rxrpc *_srx)
+struct rxrpc_peer *rxrpc_kernel_get_call_peer(struct socket *sock, struct rxrpc_call *call)
{
- *_srx = call->peer->srx;
+ return call->peer;
}
-EXPORT_SYMBOL(rxrpc_kernel_get_peer);
+EXPORT_SYMBOL(rxrpc_kernel_get_call_peer);

/**
* rxrpc_kernel_get_srtt - Get a call's peer smoothed RTT
- * @sock: The socket on which the call is in progress.
- * @call: The call to query
- * @_srtt: Where to store the SRTT value.
+ * @peer: The peer to query
*
- * Get the call's peer smoothed RTT in uS.
+ * Get the call's peer smoothed RTT in uS or UINT_MAX if we have no samples.
*/
-bool rxrpc_kernel_get_srtt(struct socket *sock, struct rxrpc_call *call,
- u32 *_srtt)
+unsigned int rxrpc_kernel_get_srtt(const struct rxrpc_peer *peer)
{
- struct rxrpc_peer *peer = call->peer;
+ return peer->rtt_count > 0 ? peer->srtt_us >> 3 : UINT_MAX;
+}
+EXPORT_SYMBOL(rxrpc_kernel_get_srtt);

- if (peer->rtt_count == 0) {
- *_srtt = 1000000; /* 1S */
- return false;
- }
+/**
+ * rxrpc_kernel_remote_srx - Get the address of a peer
+ * @peer: The peer to query
+ *
+ * Get a pointer to the address from a peer record. The caller is responsible
+ * for making sure that the address is not deallocated.
+ */
+const struct sockaddr_rxrpc *rxrpc_kernel_remote_srx(const struct rxrpc_peer *peer)
+{
+ return peer ? &peer->srx : &rxrpc_null_addr;
+}
+EXPORT_SYMBOL(rxrpc_kernel_remote_srx);

- *_srtt = call->peer->srtt_us >> 3;
- return true;
+/**
+ * rxrpc_kernel_remote_addr - Get the peer transport address of a call
+ * @peer: The peer to query
+ *
+ * Get a pointer to the transport address from a peer record. The caller is
+ * responsible for making sure that the address is not deallocated.
+ */
+const struct sockaddr *rxrpc_kernel_remote_addr(const struct rxrpc_peer *peer)
+{
+ return (const struct sockaddr *)
+ (peer ? &peer->srx.transport : &rxrpc_null_addr.transport);
}
-EXPORT_SYMBOL(rxrpc_kernel_get_srtt);
+EXPORT_SYMBOL(rxrpc_kernel_remote_addr);
diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c
index 8e0b94714e84..5677d5690a02 100644
--- a/net/rxrpc/sendmsg.c
+++ b/net/rxrpc/sendmsg.c
@@ -572,6 +572,7 @@ rxrpc_new_client_call_for_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg,
__acquires(&call->user_mutex)
{
struct rxrpc_conn_parameters cp;
+ struct rxrpc_peer *peer;
struct rxrpc_call *call;
struct key *key;

@@ -584,21 +585,29 @@ rxrpc_new_client_call_for_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg,
return ERR_PTR(-EDESTADDRREQ);
}

+ peer = rxrpc_lookup_peer(rx->local, srx, GFP_KERNEL);
+ if (!peer) {
+ release_sock(&rx->sk);
+ return ERR_PTR(-ENOMEM);
+ }
+
key = rx->key;
if (key && !rx->key->payload.data[0])
key = NULL;

memset(&cp, 0, sizeof(cp));
cp.local = rx->local;
+ cp.peer = peer;
cp.key = rx->key;
cp.security_level = rx->min_sec_level;
cp.exclusive = rx->exclusive | p->exclusive;
cp.upgrade = p->upgrade;
cp.service_id = srx->srx_service;
- call = rxrpc_new_client_call(rx, &cp, srx, &p->call, GFP_KERNEL,
+ call = rxrpc_new_client_call(rx, &cp, &p->call, GFP_KERNEL,
atomic_inc_return(&rxrpc_debug_id));
/* The socket is now unlocked */

+ rxrpc_put_peer(peer, rxrpc_peer_put_application);
_leave(" = %p\n", call);
return call;
}