diff options
| -rw-r--r-- | net/tipc/Makefile | 2 | ||||
| -rw-r--r-- | net/tipc/core.c | 7 | ||||
| -rw-r--r-- | net/tipc/ref.c | 270 | ||||
| -rw-r--r-- | net/tipc/ref.h | 56 | ||||
| -rw-r--r-- | net/tipc/socket.c | 247 | ||||
| -rw-r--r-- | net/tipc/socket.h | 2 |
6 files changed, 250 insertions, 334 deletions
diff --git a/net/tipc/Makefile b/net/tipc/Makefile index 5206a4440222..b8a13caad59a 100644 --- a/net/tipc/Makefile +++ b/net/tipc/Makefile @@ -7,7 +7,7 @@ obj-$(CONFIG_TIPC) := tipc.o tipc-y += addr.o bcast.o bearer.o config.o \ core.o link.o discover.o msg.o \ name_distr.o subscr.o name_table.o net.o \ - netlink.o node.o node_subscr.o ref.o \ + netlink.o node.o node_subscr.o \ socket.o log.o eth_media.o server.o tipc-$(CONFIG_TIPC_MEDIA_IB) += ib_media.o diff --git a/net/tipc/core.c b/net/tipc/core.c index b3b03ef30df5..a5737b8407dd 100644 --- a/net/tipc/core.c +++ b/net/tipc/core.c @@ -35,7 +35,6 @@ */ #include "core.h" -#include "ref.h" #include "name_table.h" #include "subscr.h" #include "config.h" @@ -85,7 +84,7 @@ static void tipc_core_stop(void) tipc_netlink_stop(); tipc_subscr_stop(); tipc_nametbl_stop(); - tipc_ref_table_stop(); + tipc_sk_ref_table_stop(); tipc_socket_stop(); tipc_unregister_sysctl(); } @@ -99,7 +98,7 @@ static int tipc_core_start(void) get_random_bytes(&tipc_random, sizeof(tipc_random)); - err = tipc_ref_table_init(tipc_max_ports, tipc_random); + err = tipc_sk_ref_table_init(tipc_max_ports, tipc_random); if (err) goto out_reftbl; @@ -139,7 +138,7 @@ out_socket: out_netlink: tipc_nametbl_stop(); out_nametbl: - tipc_ref_table_stop(); + tipc_sk_ref_table_stop(); out_reftbl: return err; } diff --git a/net/tipc/ref.c b/net/tipc/ref.c deleted file mode 100644 index ea981bed967b..000000000000 --- a/net/tipc/ref.c +++ /dev/null @@ -1,270 +0,0 @@ -/* - * net/tipc/ref.c: TIPC socket registry code - * - * Copyright (c) 1991-2006, 2014, Ericsson AB - * Copyright (c) 2004-2007, Wind River Systems - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the names of the copyright holders nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * Alternatively, this software may be distributed under the terms of the - * GNU General Public License ("GPL") version 2 as published by the Free - * Software Foundation. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include "core.h" -#include "ref.h" - -/** - * struct reference - TIPC socket reference entry - * @tsk: pointer to socket associated with reference entry - * @ref: reference value for socket (combines instance & array index info) - */ -struct reference { - struct tipc_sock *tsk; - u32 ref; -}; - -/** - * struct tipc_ref_table - table of TIPC socket reference entries - * @entries: pointer to array of reference entries - * @capacity: array index of first unusable entry - * @init_point: array index of first uninitialized entry - * @first_free: array index of first unused socket reference entry - * @last_free: array index of last unused socket reference entry - * @index_mask: bitmask for array index portion of reference values - * @start_mask: initial value for instance value portion of reference values - */ -struct ref_table { - struct reference *entries; - u32 capacity; - u32 init_point; - u32 first_free; - u32 last_free; - u32 index_mask; - u32 start_mask; -}; - -/* - * Socket reference table consists of 2**N entries. - * - * State Socket ptr Reference - * ----- ---------- --------- - * In use non-NULL XXXX|own index - * (XXXX changes each time entry is acquired) - * Free NULL YYYY|next free index - * (YYYY is one more than last used XXXX) - * Uninitialized NULL 0 - * - * Entry 0 is not used; this allows index 0 to denote the end of the free list. - * - * Note that a reference value of 0 does not necessarily indicate that an - * entry is uninitialized, since the last entry in the free list could also - * have a reference value of 0 (although this is unlikely). - */ - -static struct ref_table tipc_ref_table; - -static DEFINE_RWLOCK(ref_table_lock); - -/** - * tipc_ref_table_init - create reference table for sockets - */ -int tipc_ref_table_init(u32 requested_size, u32 start) -{ - struct reference *table; - u32 actual_size; - - /* account for unused entry, then round up size to a power of 2 */ - - requested_size++; - for (actual_size = 16; actual_size < requested_size; actual_size <<= 1) - /* do nothing */ ; - - /* allocate table & mark all entries as uninitialized */ - table = vzalloc(actual_size * sizeof(struct reference)); - if (table == NULL) - return -ENOMEM; - - tipc_ref_table.entries = table; - tipc_ref_table.capacity = requested_size; - tipc_ref_table.init_point = 1; - tipc_ref_table.first_free = 0; - tipc_ref_table.last_free = 0; - tipc_ref_table.index_mask = actual_size - 1; - tipc_ref_table.start_mask = start & ~tipc_ref_table.index_mask; - - return 0; -} - -/** - * tipc_ref_table_stop - destroy reference table for sockets - */ -void tipc_ref_table_stop(void) -{ - if (!tipc_ref_table.entries) - return; - vfree(tipc_ref_table.entries); - tipc_ref_table.entries = NULL; -} - -/* tipc_ref_acquire - create reference to a socket - * - * Register an socket pointer in the reference table. - * Returns a unique reference value that is used from then on to retrieve the - * socket pointer, or to determine if the socket has been deregistered. - */ -u32 tipc_ref_acquire(struct tipc_sock *tsk) -{ - u32 index; - u32 index_mask; - u32 next_plus_upper; - u32 ref = 0; - struct reference *entry; - - if (unlikely(!tsk)) { - pr_err("Attempt to acquire ref. to non-existent obj\n"); - return 0; - } - if (unlikely(!tipc_ref_table.entries)) { - pr_err("Ref. table not found in acquisition attempt\n"); - return 0; - } - - /* Take a free entry, if available; otherwise initialize a new one */ - write_lock_bh(&ref_table_lock); - index = tipc_ref_table.first_free; - entry = &tipc_ref_table.entries[index]; - - if (likely(index)) { - index = tipc_ref_table.first_free; - entry = &(tipc_ref_table.entries[index]); - index_mask = tipc_ref_table.index_mask; - next_plus_upper = entry->ref; - tipc_ref_table.first_free = next_plus_upper & index_mask; - ref = (next_plus_upper & ~index_mask) + index; - entry->tsk = tsk; - } else if (tipc_ref_table.init_point < tipc_ref_table.capacity) { - index = tipc_ref_table.init_point++; - entry = &(tipc_ref_table.entries[index]); - ref = tipc_ref_table.start_mask + index; - } - - if (ref) { - entry->ref = ref; - entry->tsk = tsk; - } - write_unlock_bh(&ref_table_lock); - return ref; -} - -/* tipc_ref_discard - invalidate reference to an socket - * - * Disallow future references to an socket and free up the entry for re-use. - */ -void tipc_ref_discard(u32 ref) -{ - struct reference *entry; - u32 index; - u32 index_mask; - - if (unlikely(!tipc_ref_table.entries)) { - pr_err("Ref. table not found during discard attempt\n"); - return; - } - - index_mask = tipc_ref_table.index_mask; - index = ref & index_mask; - entry = &(tipc_ref_table.entries[index]); - - write_lock_bh(&ref_table_lock); - - if (unlikely(!entry->tsk)) { - pr_err("Attempt to discard ref. to non-existent socket\n"); - goto exit; - } - if (unlikely(entry->ref != ref)) { - pr_err("Attempt to discard non-existent reference\n"); - goto exit; - } - - /* - * Mark entry as unused; increment instance part of entry's reference - * to invalidate any subsequent references - */ - entry->tsk = NULL; - entry->ref = (ref & ~index_mask) + (index_mask + 1); - - /* Append entry to free entry list */ - if (unlikely(tipc_ref_table.first_free == 0)) - tipc_ref_table.first_free = index; - else - tipc_ref_table.entries[tipc_ref_table.last_free].ref |= index; - tipc_ref_table.last_free = index; -exit: - write_unlock_bh(&ref_table_lock); -} - -/* tipc_sk_get - find referenced socket and return pointer to it - */ -struct tipc_sock *tipc_sk_get(u32 ref) -{ - struct reference *entry; - struct tipc_sock *tsk; - - if (unlikely(!tipc_ref_table.entries)) - return NULL; - read_lock_bh(&ref_table_lock); - entry = &tipc_ref_table.entries[ref & tipc_ref_table.index_mask]; - tsk = entry->tsk; - if (likely(tsk && (entry->ref == ref))) - sock_hold(&tsk->sk); - else - tsk = NULL; - read_unlock_bh(&ref_table_lock); - return tsk; -} - -/* tipc_sk_get_next - lock & return next socket after referenced one -*/ -struct tipc_sock *tipc_sk_get_next(u32 *ref) -{ - struct reference *entry; - struct tipc_sock *tsk = NULL; - uint index = *ref & tipc_ref_table.index_mask; - - read_lock_bh(&ref_table_lock); - while (++index < tipc_ref_table.capacity) { - entry = &tipc_ref_table.entries[index]; - if (!entry->tsk) - continue; - tsk = entry->tsk; - sock_hold(&tsk->sk); - *ref = entry->ref; - break; - } - read_unlock_bh(&ref_table_lock); - return tsk; -} diff --git a/net/tipc/ref.h b/net/tipc/ref.h deleted file mode 100644 index 2b75a892305a..000000000000 --- a/net/tipc/ref.h +++ /dev/null @@ -1,56 +0,0 @@ -/* - * net/tipc/ref.h: Include file for TIPC object registry code - * - * Copyright (c) 1991-2006, 2014, Ericsson AB - * Copyright (c) 2005-2006, Wind River Systems - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the names of the copyright holders nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * Alternatively, this software may be distributed under the terms of the - * GNU General Public License ("GPL") version 2 as published by the Free - * Software Foundation. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#ifndef _TIPC_REF_H -#define _TIPC_REF_H - -#include "socket.h" - -int tipc_ref_table_init(u32 requested_size, u32 start); -void tipc_ref_table_stop(void); - -u32 tipc_ref_acquire(struct tipc_sock *tsk); -void tipc_ref_discard(u32 ref); - -struct tipc_sock *tipc_sk_get(u32 ref); -struct tipc_sock *tipc_sk_get_next(u32 *ref); - -static inline void tipc_sk_put(struct tipc_sock *tsk) -{ - sock_put(&tsk->sk); -} - -#endif diff --git a/net/tipc/socket.c b/net/tipc/socket.c index 70eaceae1f8c..6a699671245b 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -35,7 +35,6 @@ */ #include "core.h" -#include "ref.h" #include "name_table.h" #include "node.h" #include "link.h" @@ -61,6 +60,11 @@ static int tipc_sk_publish(struct tipc_port *port, uint scope, struct tipc_name_seq const *seq); static int tipc_sk_withdraw(struct tipc_port *port, uint scope, struct tipc_name_seq const *seq); +static u32 tipc_sk_ref_acquire(struct tipc_sock *tsk); +static void tipc_sk_ref_discard(u32 ref); +static struct tipc_sock *tipc_sk_get(u32 ref); +static struct tipc_sock *tipc_sk_get_next(u32 *ref); +static void tipc_sk_put(struct tipc_sock *tsk); static const struct proto_ops packet_ops; static const struct proto_ops stream_ops; @@ -271,7 +275,7 @@ static int tipc_sk_create(struct net *net, struct socket *sock, tsk = tipc_sk(sk); port = &tsk->port; - ref = tipc_ref_acquire(tsk); + ref = tipc_sk_ref_acquire(tsk); if (!ref) { pr_warn("Socket create failed; reference table exhausted\n"); return -ENOMEM; @@ -434,7 +438,7 @@ static int tipc_release(struct socket *sock) } tipc_sk_withdraw(port, 0, NULL); - tipc_ref_discard(port->ref); + tipc_sk_ref_discard(port->ref); k_cancel_timer(&port->timer); if (port->connected) { buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG, @@ -2254,6 +2258,243 @@ void tipc_sk_reinit(void) } /** + * struct reference - TIPC socket reference entry + * @tsk: pointer to socket associated with reference entry + * @ref: reference value for socket (combines instance & array index info) + */ +struct reference { + struct tipc_sock *tsk; + u32 ref; +}; + +/** + * struct tipc_ref_table - table of TIPC socket reference entries + * @entries: pointer to array of reference entries + * @capacity: array index of first unusable entry + * @init_point: array index of first uninitialized entry + * @first_free: array index of first unused socket reference entry + * @last_free: array index of last unused socket reference entry + * @index_mask: bitmask for array index portion of reference values + * @start_mask: initial value for instance value portion of reference values + */ +struct ref_table { + struct reference *entries; + u32 capacity; + u32 init_point; + u32 first_free; + u32 last_free; + u32 index_mask; + u32 start_mask; +}; + +/* Socket reference table consists of 2**N entries. + * + * State Socket ptr Reference + * ----- ---------- --------- + * In use non-NULL XXXX|own index + * (XXXX changes each time entry is acquired) + * Free NULL YYYY|next free index + * (YYYY is one more than last used XXXX) + * Uninitialized NULL 0 + * + * Entry 0 is not used; this allows index 0 to denote the end of the free list. + * + * Note that a reference value of 0 does not necessarily indicate that an + * entry is uninitialized, since the last entry in the free list could also + * have a reference value of 0 (although this is unlikely). + */ + +static struct ref_table tipc_ref_table; + +static DEFINE_RWLOCK(ref_table_lock); + +/** + * tipc_ref_table_init - create reference table for sockets + */ +int tipc_sk_ref_table_init(u32 req_sz, u32 start) +{ + struct reference *table; + u32 actual_sz; + + /* account for unused entry, then round up size to a power of 2 */ + + req_sz++; + for (actual_sz = 16; actual_sz < req_sz; actual_sz <<= 1) { + /* do nothing */ + }; + + /* allocate table & mark all entries as uninitialized */ + table = vzalloc(actual_sz * sizeof(struct reference)); + if (table == NULL) + return -ENOMEM; + + tipc_ref_table.entries = table; + tipc_ref_table.capacity = req_sz; + tipc_ref_table.init_point = 1; + tipc_ref_table.first_free = 0; + tipc_ref_table.last_free = 0; + tipc_ref_table.index_mask = actual_sz - 1; + tipc_ref_table.start_mask = start & ~tipc_ref_table.index_mask; + + return 0; +} + +/** + * tipc_ref_table_stop - destroy reference table for sockets + */ +void tipc_sk_ref_table_stop(void) +{ + if (!tipc_ref_table.entries) + return; + vfree(tipc_ref_table.entries); + tipc_ref_table.entries = NULL; +} + +/* tipc_ref_acquire - create reference to a socket + * + * Register an socket pointer in the reference table. + * Returns a unique reference value that is used from then on to retrieve the + * socket pointer, or to determine if the socket has been deregistered. + */ +u32 tipc_sk_ref_acquire(struct tipc_sock *tsk) +{ + u32 index; + u32 index_mask; + u32 next_plus_upper; + u32 ref = 0; + struct reference *entry; + + if (unlikely(!tsk)) { + pr_err("Attempt to acquire ref. to non-existent obj\n"); + return 0; + } + if (unlikely(!tipc_ref_table.entries)) { + pr_err("Ref. table not found in acquisition attempt\n"); + return 0; + } + + /* Take a free entry, if available; otherwise initialize a new one */ + write_lock_bh(&ref_table_lock); + index = tipc_ref_table.first_free; + entry = &tipc_ref_table.entries[index]; + + if (likely(index)) { + index = tipc_ref_table.first_free; + entry = &tipc_ref_table.entries[index]; + index_mask = tipc_ref_table.index_mask; + next_plus_upper = entry->ref; + tipc_ref_table.first_free = next_plus_upper & index_mask; + ref = (next_plus_upper & ~index_mask) + index; + entry->tsk = tsk; + } else if (tipc_ref_table.init_point < tipc_ref_table.capacity) { + index = tipc_ref_table.init_point++; + entry = &tipc_ref_table.entries[index]; + ref = tipc_ref_table.start_mask + index; + } + + if (ref) { + entry->ref = ref; + entry->tsk = tsk; + } + write_unlock_bh(&ref_table_lock); + return ref; +} + +/* tipc_sk_ref_discard - invalidate reference to an socket + * + * Disallow future references to an socket and free up the entry for re-use. + */ +void tipc_sk_ref_discard(u32 ref) +{ + struct reference *entry; + u32 index; + u32 index_mask; + + if (unlikely(!tipc_ref_table.entries)) { + pr_err("Ref. table not found during discard attempt\n"); + return; + } + + index_mask = tipc_ref_table.index_mask; + index = ref & index_mask; + entry = &tipc_ref_table.entries[index]; + + write_lock_bh(&ref_table_lock); + + if (unlikely(!entry->tsk)) { + pr_err("Attempt to discard ref. to non-existent socket\n"); + goto exit; + } + if (unlikely(entry->ref != ref)) { + pr_err("Attempt to discard non-existent reference\n"); + goto exit; + } + + /* Mark entry as unused; increment instance part of entry's + * reference to invalidate any subsequent references + */ + + entry->tsk = NULL; + entry->ref = (ref & ~index_mask) + (index_mask + 1); + + /* Append entry to free entry list */ + if (unlikely(tipc_ref_table.first_free == 0)) + tipc_ref_table.first_free = index; + else + tipc_ref_table.entries[tipc_ref_table.last_free].ref |= index; + tipc_ref_table.last_free = index; +exit: + write_unlock_bh(&ref_table_lock); +} + +/* tipc_sk_get - find referenced socket and return pointer to it + */ +struct tipc_sock *tipc_sk_get(u32 ref) +{ + struct reference *entry; + struct tipc_sock *tsk; + + if (unlikely(!tipc_ref_table.entries)) + return NULL; + read_lock_bh(&ref_table_lock); + entry = &tipc_ref_table.entries[ref & tipc_ref_table.index_mask]; + tsk = entry->tsk; + if (likely(tsk && (entry->ref == ref))) + sock_hold(&tsk->sk); + else + tsk = NULL; + read_unlock_bh(&ref_table_lock); + return tsk; +} + +/* tipc_sk_get_next - lock & return next socket after referenced one +*/ +struct tipc_sock *tipc_sk_get_next(u32 *ref) +{ + struct reference *entry; + struct tipc_sock *tsk = NULL; + uint index = *ref & tipc_ref_table.index_mask; + + read_lock_bh(&ref_table_lock); + while (++index < tipc_ref_table.capacity) { + entry = &tipc_ref_table.entries[index]; + if (!entry->tsk) + continue; + tsk = entry->tsk; + sock_hold(&tsk->sk); + *ref = entry->ref; + break; + } + read_unlock_bh(&ref_table_lock); + return tsk; +} + +static void tipc_sk_put(struct tipc_sock *tsk) +{ + sock_put(&tsk->sk); +} + +/** * tipc_setsockopt - set socket option * @sock: socket structure * @lvl: option level diff --git a/net/tipc/socket.h b/net/tipc/socket.h index b98725e27b94..48772169bc77 100644 --- a/net/tipc/socket.h +++ b/net/tipc/socket.h @@ -119,5 +119,7 @@ int tipc_sk_rcv(struct sk_buff *buf); struct sk_buff *tipc_sk_socks_show(void); void tipc_sk_mcast_rcv(struct sk_buff *buf); void tipc_sk_reinit(void); +int tipc_sk_ref_table_init(u32 requested_size, u32 start); +void tipc_sk_ref_table_stop(void); #endif |