diff options
| author | Guanjun He <gjhe@suse.com> | 2012-07-08 19:50:33 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-26 11:38:38 -0800 |
| commit | 59d02721bb2838893596d5617659fe907dd45518 (patch) | |
| tree | 126ac6b7dba3ef26cb4c6e32b7bc2faf74c1c35d | |
| parent | 9beb73fcb83317786226b4203d7e56c6b0f43adb (diff) | |
libceph: prevent the race of incoming work during teardown
(cherry picked from commit a2a3258417eb6a1799cf893350771428875a8287)
Add an atomic variable 'stopping' as flag in struct ceph_messenger,
set this flag to 1 in function ceph_destroy_client(), and add the condition code
in function ceph_data_ready() to test the flag value, if true(1), just return.
Signed-off-by: Guanjun He <gjhe@suse.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | include/linux/ceph/messenger.h | 1 | ||||
| -rw-r--r-- | net/ceph/ceph_common.c | 2 | ||||
| -rw-r--r-- | net/ceph/messenger.c | 5 |
3 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/ceph/messenger.h b/include/linux/ceph/messenger.h index ec22abd51fa0..de39cda6bd58 100644 --- a/include/linux/ceph/messenger.h +++ b/include/linux/ceph/messenger.h @@ -50,6 +50,7 @@ struct ceph_messenger { struct ceph_entity_inst inst; /* my name+address */ struct ceph_entity_addr my_enc_addr; + atomic_t stopping; bool nocrc; /* diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c index c815f31a1a3f..52fe52cde606 100644 --- a/net/ceph/ceph_common.c +++ b/net/ceph/ceph_common.c @@ -495,6 +495,8 @@ void ceph_destroy_client(struct ceph_client *client) { dout("destroy_client %p\n", client); + atomic_set(&client->msgr.stopping, 1); + /* unmount */ ceph_osdc_stop(&client->osdc); diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 866645fa857f..edd51321ae18 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -254,6 +254,9 @@ static void con_sock_state_closed(struct ceph_connection *con) static void ceph_sock_data_ready(struct sock *sk, int count_unused) { struct ceph_connection *con = sk->sk_user_data; + if (atomic_read(&con->msgr->stopping)) { + return; + } if (sk->sk_state != TCP_CLOSE_WAIT) { dout("%s on %p state = %lu, queueing work\n", __func__, @@ -2413,6 +2416,8 @@ void ceph_messenger_init(struct ceph_messenger *msgr, encode_my_addr(msgr); msgr->nocrc = nocrc; + atomic_set(&msgr->stopping, 0); + dout("%s %p\n", __func__, msgr); } EXPORT_SYMBOL(ceph_messenger_init); |