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| author | Vlad Yasevich <vladislav.yasevich@hp.com> | 2007-10-24 20:10:00 (GMT) |
|---|---|---|
| committer | Vlad Yasevich <vladislav.yasevich@hp.com> | 2007-11-07 16:39:27 (GMT) |
| commit | 0ed90fb0f668fd07f14ae2007a809e8b26cd27a6 (patch) | |
| tree | 114e48301b89a8e82f7238d8b691880607842947 /net/sctp | |
| parent | b6157d8e03e1e780660a328f7183bcbfa4a93a19 (diff) | |
| download | linux-0ed90fb0f668fd07f14ae2007a809e8b26cd27a6.tar.xz | |
SCTP: Update RCU handling during the ADD-IP case
After learning more about rcu, it looks like the ADD-IP hadling
doesn't need to call call_rcu_bh. All the rcu critical sections
use rcu_read_lock, so using call_rcu_bh is wrong here.
Now, restore the local_bh_disable() code blocks and use normal
call_rcu() calls. Also restore the missing return statement.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Diffstat (limited to 'net/sctp')
| -rw-r--r-- | net/sctp/bind_addr.c | 13 | ||||
| -rw-r--r-- | net/sctp/sm_make_chunk.c | 6 | ||||
| -rw-r--r-- | net/sctp/socket.c | 2 |
3 files changed, 9 insertions, 12 deletions
diff --git a/net/sctp/bind_addr.c b/net/sctp/bind_addr.c index dfffa94..cae95af 100644 --- a/net/sctp/bind_addr.c +++ b/net/sctp/bind_addr.c @@ -180,9 +180,7 @@ int sctp_add_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *new, /* Delete an address from the bind address list in the SCTP_bind_addr * structure. */ -int sctp_del_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *del_addr, - void fastcall (*rcu_call)(struct rcu_head *head, - void (*func)(struct rcu_head *head))) +int sctp_del_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *del_addr) { struct sctp_sockaddr_entry *addr, *temp; @@ -198,15 +196,10 @@ int sctp_del_bind_addr(struct sctp_bind_addr *bp, union sctp_addr *del_addr, } } - /* Call the rcu callback provided in the args. This function is - * called by both BH packet processing and user side socket option - * processing, but it works on different lists in those 2 contexts. - * Each context provides it's own callback, whether call_rcu_bh() - * or call_rcu(), to make sure that we wait for an appropriate time. - */ if (addr && !addr->valid) { - rcu_call(&addr->rcu, sctp_local_addr_free); + call_rcu(&addr->rcu, sctp_local_addr_free); SCTP_DBG_OBJCNT_DEC(addr); + return 0; } return -EINVAL; diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c index 5de4729..c60564d 100644 --- a/net/sctp/sm_make_chunk.c +++ b/net/sctp/sm_make_chunk.c @@ -2953,13 +2953,17 @@ static int sctp_asconf_param_success(struct sctp_association *asoc, /* This is always done in BH context with a socket lock * held, so the list can not change. */ + local_bh_disable(); list_for_each_entry(saddr, &bp->address_list, list) { if (sctp_cmp_addr_exact(&saddr->a, &addr)) saddr->use_as_src = 1; } + local_bh_enable(); break; case SCTP_PARAM_DEL_IP: - retval = sctp_del_bind_addr(bp, &addr, call_rcu_bh); + local_bh_disable(); + retval = sctp_del_bind_addr(bp, &addr); + local_bh_enable(); list_for_each(pos, &asoc->peer.transport_addr_list) { transport = list_entry(pos, struct sctp_transport, transports); diff --git a/net/sctp/socket.c b/net/sctp/socket.c index a7ecf31..6ce9b49 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -660,7 +660,7 @@ static int sctp_bindx_rem(struct sock *sk, struct sockaddr *addrs, int addrcnt) * socket routing and failover schemes. Refer to comments in * sctp_do_bind(). -daisy */ - retval = sctp_del_bind_addr(bp, sa_addr, call_rcu); + retval = sctp_del_bind_addr(bp, sa_addr); addr_buf += af->sockaddr_len; err_bindx_rem: |