From: Sage Weil Date: Sat, 21 Jul 2012 00:29:55 +0000 (-0700) Subject: libceph: clean up con flags X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4a8616920860920abaa51193146fe36b38ef09aa;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git libceph: clean up con flags Rename flags with CON_FLAG prefix, move the definitions into the c file, and (better) document their meaning. Signed-off-by: Sage Weil --- diff --git a/include/linux/ceph/messenger.h b/include/linux/ceph/messenger.h index d9c2b8f5abde..189ae0637634 100644 --- a/include/linux/ceph/messenger.h +++ b/include/linux/ceph/messenger.h @@ -106,16 +106,6 @@ struct ceph_msg_pos { #define BASE_DELAY_INTERVAL (HZ/2) #define MAX_DELAY_INTERVAL (5 * 60 * HZ) -/* - * ceph_connection flag bits - */ - -#define LOSSYTX 0 /* we can close channel or drop messages on errors */ -#define KEEPALIVE_PENDING 3 -#define WRITE_PENDING 4 /* we have data ready to send */ -#define SOCK_CLOSED 11 /* socket state changed to closed */ -#define BACKOFF 15 - /* * A single connection with another host. * diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 563e46aa4d6d..b872db5c4989 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -87,6 +87,15 @@ #define CON_STATE_OPEN 5 /* -> STANDBY, CLOSED */ #define CON_STATE_STANDBY 6 /* -> PREOPEN, CLOSED */ +/* + * ceph_connection flag bits + */ +#define CON_FLAG_LOSSYTX 0 /* we can close channel or drop + * messages on errors */ +#define CON_FLAG_KEEPALIVE_PENDING 1 /* we need to send a keepalive */ +#define CON_FLAG_WRITE_PENDING 2 /* we have data ready to send */ +#define CON_FLAG_SOCK_CLOSED 3 /* socket state changed to closed */ +#define CON_FLAG_BACKOFF 4 /* need to retry queuing delayed work */ /* static tag bytes (protocol control messages) */ static char tag_msg = CEPH_MSGR_TAG_MSG; @@ -288,7 +297,7 @@ static void ceph_sock_write_space(struct sock *sk) * buffer. See net/ipv4/tcp_input.c:tcp_check_space() * and net/core/stream.c:sk_stream_write_space(). */ - if (test_bit(WRITE_PENDING, &con->flags)) { + if (test_bit(CON_FLAG_WRITE_PENDING, &con->flags)) { if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { dout("%s %p queueing write work\n", __func__, con); clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); @@ -313,7 +322,7 @@ static void ceph_sock_state_change(struct sock *sk) case TCP_CLOSE_WAIT: dout("%s TCP_CLOSE_WAIT\n", __func__); con_sock_state_closing(con); - set_bit(SOCK_CLOSED, &con->flags); + set_bit(CON_FLAG_SOCK_CLOSED, &con->flags); queue_con(con); break; case TCP_ESTABLISHED: @@ -449,12 +458,12 @@ static int con_close_socket(struct ceph_connection *con) con->sock = NULL; /* - * Forcibly clear the SOCK_CLOSE flag. It gets set + * Forcibly clear the SOCK_CLOSED flag. It gets set * independent of the connection mutex, and we could have * received a socket close event before we had the chance to * shut the socket down. */ - clear_bit(SOCK_CLOSED, &con->flags); + clear_bit(CON_FLAG_SOCK_CLOSED, &con->flags); con_sock_state_closed(con); return rc; } @@ -516,9 +525,9 @@ void ceph_con_close(struct ceph_connection *con) ceph_pr_addr(&con->peer_addr.in_addr)); con->state = CON_STATE_CLOSED; - clear_bit(LOSSYTX, &con->flags); /* so we retry next connect */ - clear_bit(KEEPALIVE_PENDING, &con->flags); - clear_bit(WRITE_PENDING, &con->flags); + clear_bit(CON_FLAG_LOSSYTX, &con->flags); /* so we retry next connect */ + clear_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags); + clear_bit(CON_FLAG_WRITE_PENDING, &con->flags); reset_connection(con); con->peer_global_seq = 0; @@ -770,7 +779,7 @@ static void prepare_write_message(struct ceph_connection *con) /* no, queue up footer too and be done */ prepare_write_message_footer(con); - set_bit(WRITE_PENDING, &con->flags); + set_bit(CON_FLAG_WRITE_PENDING, &con->flags); } /* @@ -791,7 +800,7 @@ static void prepare_write_ack(struct ceph_connection *con) &con->out_temp_ack); con->out_more = 1; /* more will follow.. eventually.. */ - set_bit(WRITE_PENDING, &con->flags); + set_bit(CON_FLAG_WRITE_PENDING, &con->flags); } /* @@ -802,7 +811,7 @@ static void prepare_write_keepalive(struct ceph_connection *con) dout("prepare_write_keepalive %p\n", con); con_out_kvec_reset(con); con_out_kvec_add(con, sizeof (tag_keepalive), &tag_keepalive); - set_bit(WRITE_PENDING, &con->flags); + set_bit(CON_FLAG_WRITE_PENDING, &con->flags); } /* @@ -845,7 +854,7 @@ static void prepare_write_banner(struct ceph_connection *con) &con->msgr->my_enc_addr); con->out_more = 0; - set_bit(WRITE_PENDING, &con->flags); + set_bit(CON_FLAG_WRITE_PENDING, &con->flags); } static int prepare_write_connect(struct ceph_connection *con) @@ -896,7 +905,7 @@ static int prepare_write_connect(struct ceph_connection *con) auth->authorizer_buf); con->out_more = 0; - set_bit(WRITE_PENDING, &con->flags); + set_bit(CON_FLAG_WRITE_PENDING, &con->flags); return 0; } @@ -1622,7 +1631,7 @@ static int process_connect(struct ceph_connection *con) le32_to_cpu(con->in_reply.connect_seq)); if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY) - set_bit(LOSSYTX, &con->flags); + set_bit(CON_FLAG_LOSSYTX, &con->flags); con->delay = 0; /* reset backoff memory */ @@ -2061,14 +2070,15 @@ do_next: prepare_write_ack(con); goto more; } - if (test_and_clear_bit(KEEPALIVE_PENDING, &con->flags)) { + if (test_and_clear_bit(CON_FLAG_KEEPALIVE_PENDING, + &con->flags)) { prepare_write_keepalive(con); goto more; } } /* Nothing to do! */ - clear_bit(WRITE_PENDING, &con->flags); + clear_bit(CON_FLAG_WRITE_PENDING, &con->flags); dout("try_write nothing else to write.\n"); ret = 0; out: @@ -2241,7 +2251,7 @@ static void con_work(struct work_struct *work) mutex_lock(&con->mutex); restart: - if (test_and_clear_bit(SOCK_CLOSED, &con->flags)) { + if (test_and_clear_bit(CON_FLAG_SOCK_CLOSED, &con->flags)) { switch (con->state) { case CON_STATE_CONNECTING: con->error_msg = "connection failed"; @@ -2260,7 +2270,7 @@ restart: goto fault; } - if (test_and_clear_bit(BACKOFF, &con->flags)) { + if (test_and_clear_bit(CON_FLAG_BACKOFF, &con->flags)) { dout("con_work %p backing off\n", con); if (queue_delayed_work(ceph_msgr_wq, &con->work, round_jiffies_relative(con->delay))) { @@ -2336,7 +2346,7 @@ static void ceph_fault(struct ceph_connection *con) con_close_socket(con); - if (test_bit(LOSSYTX, &con->flags)) { + if (test_bit(CON_FLAG_LOSSYTX, &con->flags)) { dout("fault on LOSSYTX channel, marking CLOSED\n"); con->state = CON_STATE_CLOSED; goto out_unlock; @@ -2356,9 +2366,9 @@ static void ceph_fault(struct ceph_connection *con) /* If there are no messages queued or keepalive pending, place * the connection in a STANDBY state */ if (list_empty(&con->out_queue) && - !test_bit(KEEPALIVE_PENDING, &con->flags)) { + !test_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags)) { dout("fault %p setting STANDBY clearing WRITE_PENDING\n", con); - clear_bit(WRITE_PENDING, &con->flags); + clear_bit(CON_FLAG_WRITE_PENDING, &con->flags); con->state = CON_STATE_STANDBY; } else { /* retry after a delay. */ @@ -2383,7 +2393,7 @@ static void ceph_fault(struct ceph_connection *con) * that when con_work restarts we schedule the * delay then. */ - set_bit(BACKOFF, &con->flags); + set_bit(CON_FLAG_BACKOFF, &con->flags); } } @@ -2440,8 +2450,8 @@ static void clear_standby(struct ceph_connection *con) dout("clear_standby %p and ++connect_seq\n", con); con->state = CON_STATE_PREOPEN; con->connect_seq++; - WARN_ON(test_bit(WRITE_PENDING, &con->flags)); - WARN_ON(test_bit(KEEPALIVE_PENDING, &con->flags)); + WARN_ON(test_bit(CON_FLAG_WRITE_PENDING, &con->flags)); + WARN_ON(test_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags)); } } @@ -2482,7 +2492,7 @@ void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) /* if there wasn't anything waiting to send before, queue * new work */ - if (test_and_set_bit(WRITE_PENDING, &con->flags) == 0) + if (test_and_set_bit(CON_FLAG_WRITE_PENDING, &con->flags) == 0) queue_con(con); } EXPORT_SYMBOL(ceph_con_send); @@ -2571,8 +2581,8 @@ void ceph_con_keepalive(struct ceph_connection *con) mutex_lock(&con->mutex); clear_standby(con); mutex_unlock(&con->mutex); - if (test_and_set_bit(KEEPALIVE_PENDING, &con->flags) == 0 && - test_and_set_bit(WRITE_PENDING, &con->flags) == 0) + if (test_and_set_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags) == 0 && + test_and_set_bit(CON_FLAG_WRITE_PENDING, &con->flags) == 0) queue_con(con); } EXPORT_SYMBOL(ceph_con_keepalive);