#include <linux/slab.h>
#include <linux/socket.h>
#include <linux/string.h>
+#ifdef CONFIG_BLOCK
#include <linux/bio.h>
-#include <linux/blkdev.h>
+#endif /* CONFIG_BLOCK */
#include <linux/dns_resolver.h>
#include <net/tcp.h>
#define CON_FLAG_SOCK_CLOSED 3 /* socket state changed to closed */
#define CON_FLAG_BACKOFF 4 /* need to retry queuing delayed work */
+static bool con_flag_valid(unsigned long con_flag)
+{
+ switch (con_flag) {
+ case CON_FLAG_LOSSYTX:
+ case CON_FLAG_KEEPALIVE_PENDING:
+ case CON_FLAG_WRITE_PENDING:
+ case CON_FLAG_SOCK_CLOSED:
+ case CON_FLAG_BACKOFF:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static void con_flag_clear(struct ceph_connection *con, unsigned long con_flag)
+{
+ BUG_ON(!con_flag_valid(con_flag));
+
+ clear_bit(con_flag, &con->flags);
+}
+
+static void con_flag_set(struct ceph_connection *con, unsigned long con_flag)
+{
+ BUG_ON(!con_flag_valid(con_flag));
+
+ set_bit(con_flag, &con->flags);
+}
+
+static bool con_flag_test(struct ceph_connection *con, unsigned long con_flag)
+{
+ BUG_ON(!con_flag_valid(con_flag));
+
+ return test_bit(con_flag, &con->flags);
+}
+
+static bool con_flag_test_and_clear(struct ceph_connection *con,
+ unsigned long con_flag)
+{
+ BUG_ON(!con_flag_valid(con_flag));
+
+ return test_and_clear_bit(con_flag, &con->flags);
+}
+
+static bool con_flag_test_and_set(struct ceph_connection *con,
+ unsigned long con_flag)
+{
+ BUG_ON(!con_flag_valid(con_flag));
+
+ return test_and_set_bit(con_flag, &con->flags);
+}
+
/* static tag bytes (protocol control messages) */
static char tag_msg = CEPH_MSGR_TAG_MSG;
static char tag_ack = CEPH_MSGR_TAG_ACK;
static void queue_con(struct ceph_connection *con);
static void con_work(struct work_struct *);
-static void ceph_fault(struct ceph_connection *con);
+static void con_fault(struct ceph_connection *con);
/*
* Nicely render a sockaddr as a string. An array of formatted
*/
static struct workqueue_struct *ceph_msgr_wq;
-void _ceph_msgr_exit(void)
+static void _ceph_msgr_exit(void)
{
if (ceph_msgr_wq) {
destroy_workqueue(ceph_msgr_wq);
* buffer. See net/ipv4/tcp_input.c:tcp_check_space()
* and net/core/stream.c:sk_stream_write_space().
*/
- if (test_bit(CON_FLAG_WRITE_PENDING, &con->flags)) {
+ if (con_flag_test(con, CON_FLAG_WRITE_PENDING)) {
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);
case TCP_CLOSE_WAIT:
dout("%s TCP_CLOSE_WAIT\n", __func__);
con_sock_state_closing(con);
- set_bit(CON_FLAG_SOCK_CLOSED, &con->flags);
+ con_flag_set(con, CON_FLAG_SOCK_CLOSED);
queue_con(con);
break;
case TCP_ESTABLISHED:
* received a socket close event before we had the chance to
* shut the socket down.
*/
- clear_bit(CON_FLAG_SOCK_CLOSED, &con->flags);
+ con_flag_clear(con, CON_FLAG_SOCK_CLOSED);
con_sock_state_closed(con);
return rc;
ceph_pr_addr(&con->peer_addr.in_addr));
con->state = CON_STATE_CLOSED;
- 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);
- clear_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags);
- clear_bit(CON_FLAG_BACKOFF, &con->flags);
+ con_flag_clear(con, CON_FLAG_LOSSYTX); /* so we retry next connect */
+ con_flag_clear(con, CON_FLAG_KEEPALIVE_PENDING);
+ con_flag_clear(con, CON_FLAG_WRITE_PENDING);
+ con_flag_clear(con, CON_FLAG_BACKOFF);
reset_connection(con);
con->peer_global_seq = 0;
/* no, queue up footer too and be done */
prepare_write_message_footer(con);
- set_bit(CON_FLAG_WRITE_PENDING, &con->flags);
+ con_flag_set(con, CON_FLAG_WRITE_PENDING);
}
/*
&con->out_temp_ack);
con->out_more = 1; /* more will follow.. eventually.. */
- set_bit(CON_FLAG_WRITE_PENDING, &con->flags);
+ con_flag_set(con, CON_FLAG_WRITE_PENDING);
}
/*
dout("prepare_write_keepalive %p\n", con);
con_out_kvec_reset(con);
con_out_kvec_add(con, sizeof (tag_keepalive), &tag_keepalive);
- set_bit(CON_FLAG_WRITE_PENDING, &con->flags);
+ con_flag_set(con, CON_FLAG_WRITE_PENDING);
}
/*
&con->msgr->my_enc_addr);
con->out_more = 0;
- set_bit(CON_FLAG_WRITE_PENDING, &con->flags);
+ con_flag_set(con, CON_FLAG_WRITE_PENDING);
}
static int prepare_write_connect(struct ceph_connection *con)
auth->authorizer_buf);
con->out_more = 0;
- set_bit(CON_FLAG_WRITE_PENDING, &con->flags);
+ con_flag_set(con, CON_FLAG_WRITE_PENDING);
return 0;
}
le32_to_cpu(con->in_reply.connect_seq));
if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY)
- set_bit(CON_FLAG_LOSSYTX, &con->flags);
+ con_flag_set(con, CON_FLAG_LOSSYTX);
con->delay = 0; /* reset backoff memory */
prepare_write_ack(con);
goto more;
}
- if (test_and_clear_bit(CON_FLAG_KEEPALIVE_PENDING,
- &con->flags)) {
+ if (con_flag_test_and_clear(con, CON_FLAG_KEEPALIVE_PENDING)) {
prepare_write_keepalive(con);
goto more;
}
}
/* Nothing to do! */
- clear_bit(CON_FLAG_WRITE_PENDING, &con->flags);
+ con_flag_clear(con, CON_FLAG_WRITE_PENDING);
dout("try_write nothing else to write.\n");
ret = 0;
out:
static bool con_sock_closed(struct ceph_connection *con)
{
- if (!test_and_clear_bit(CON_FLAG_SOCK_CLOSED, &con->flags))
+ if (!con_flag_test_and_clear(con, CON_FLAG_SOCK_CLOSED))
return false;
#define CASE(x) \
return true;
}
+static bool con_backoff(struct ceph_connection *con)
+{
+ int ret;
+
+ if (!con_flag_test_and_clear(con, CON_FLAG_BACKOFF))
+ return false;
+
+ ret = queue_con_delay(con, round_jiffies_relative(con->delay));
+ if (ret) {
+ dout("%s: con %p FAILED to back off %lu\n", __func__,
+ con, con->delay);
+ BUG_ON(ret == -ENOENT);
+ con_flag_set(con, CON_FLAG_BACKOFF);
+ }
+
+ return true;
+}
+
+/* Finish fault handling; con->mutex must *not* be held here */
+
+static void con_fault_finish(struct ceph_connection *con)
+{
+ /*
+ * in case we faulted due to authentication, invalidate our
+ * current tickets so that we can get new ones.
+ */
+ if (con->auth_retry && con->ops->invalidate_authorizer) {
+ dout("calling invalidate_authorizer()\n");
+ con->ops->invalidate_authorizer(con);
+ }
+
+ if (con->ops->fault)
+ con->ops->fault(con);
+}
+
/*
* Do some work on a connection. Drop a connection ref when we're done.
*/
{
struct ceph_connection *con = container_of(work, struct ceph_connection,
work.work);
- int ret;
+ bool fault;
mutex_lock(&con->mutex);
-restart:
- if (con_sock_closed(con))
- goto fault;
+ while (true) {
+ int ret;
- if (test_and_clear_bit(CON_FLAG_BACKOFF, &con->flags)) {
- dout("con_work %p backing off\n", con);
- ret = queue_con_delay(con, round_jiffies_relative(con->delay));
- if (ret) {
- dout("con_work %p FAILED to back off %lu\n", con,
- con->delay);
- BUG_ON(ret == -ENOENT);
- set_bit(CON_FLAG_BACKOFF, &con->flags);
+ if ((fault = con_sock_closed(con))) {
+ dout("%s: con %p SOCK_CLOSED\n", __func__, con);
+ break;
+ }
+ if (con_backoff(con)) {
+ dout("%s: con %p BACKOFF\n", __func__, con);
+ break;
+ }
+ if (con->state == CON_STATE_STANDBY) {
+ dout("%s: con %p STANDBY\n", __func__, con);
+ break;
+ }
+ if (con->state == CON_STATE_CLOSED) {
+ dout("%s: con %p CLOSED\n", __func__, con);
+ BUG_ON(con->sock);
+ break;
+ }
+ if (con->state == CON_STATE_PREOPEN) {
+ dout("%s: con %p PREOPEN\n", __func__, con);
+ BUG_ON(con->sock);
}
- goto done;
- }
- if (con->state == CON_STATE_STANDBY) {
- dout("con_work %p STANDBY\n", con);
- goto done;
- }
- if (con->state == CON_STATE_CLOSED) {
- dout("con_work %p CLOSED\n", con);
- BUG_ON(con->sock);
- goto done;
- }
- if (con->state == CON_STATE_PREOPEN) {
- dout("con_work OPENING\n");
- BUG_ON(con->sock);
- }
+ ret = try_read(con);
+ if (ret < 0) {
+ if (ret == -EAGAIN)
+ continue;
+ con->error_msg = "socket error on read";
+ fault = true;
+ break;
+ }
- ret = try_read(con);
- if (ret == -EAGAIN)
- goto restart;
- if (ret < 0) {
- con->error_msg = "socket error on read";
- goto fault;
- }
+ ret = try_write(con);
+ if (ret < 0) {
+ if (ret == -EAGAIN)
+ continue;
+ con->error_msg = "socket error on write";
+ fault = true;
+ }
- ret = try_write(con);
- if (ret == -EAGAIN)
- goto restart;
- if (ret < 0) {
- con->error_msg = "socket error on write";
- goto fault;
+ break; /* If we make it to here, we're done */
}
-
-done:
+ if (fault)
+ con_fault(con);
mutex_unlock(&con->mutex);
-done_unlocked:
- con->ops->put(con);
- return;
-fault:
- ceph_fault(con); /* error/fault path */
- goto done_unlocked;
-}
+ if (fault)
+ con_fault_finish(con);
+ con->ops->put(con);
+}
/*
* Generic error/fault handler. A retry mechanism is used with
* exponential backoff
*/
-static void ceph_fault(struct ceph_connection *con)
- __releases(con->mutex)
+static void con_fault(struct ceph_connection *con)
{
pr_warning("%s%lld %s %s\n", ENTITY_NAME(con->peer_name),
ceph_pr_addr(&con->peer_addr.in_addr), con->error_msg);
con_close_socket(con);
- if (test_bit(CON_FLAG_LOSSYTX, &con->flags)) {
+ if (con_flag_test(con, CON_FLAG_LOSSYTX)) {
dout("fault on LOSSYTX channel, marking CLOSED\n");
con->state = CON_STATE_CLOSED;
- goto out_unlock;
+ return;
}
if (con->in_msg) {
/* If there are no messages queued or keepalive pending, place
* the connection in a STANDBY state */
if (list_empty(&con->out_queue) &&
- !test_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags)) {
+ !con_flag_test(con, CON_FLAG_KEEPALIVE_PENDING)) {
dout("fault %p setting STANDBY clearing WRITE_PENDING\n", con);
- clear_bit(CON_FLAG_WRITE_PENDING, &con->flags);
+ con_flag_clear(con, CON_FLAG_WRITE_PENDING);
con->state = CON_STATE_STANDBY;
} else {
/* retry after a delay. */
con->delay = BASE_DELAY_INTERVAL;
else if (con->delay < MAX_DELAY_INTERVAL)
con->delay *= 2;
- set_bit(CON_FLAG_BACKOFF, &con->flags);
+ con_flag_set(con, CON_FLAG_BACKOFF);
queue_con(con);
}
-
-out_unlock:
- mutex_unlock(&con->mutex);
- /*
- * in case we faulted due to authentication, invalidate our
- * current tickets so that we can get new ones.
- */
- if (con->auth_retry && con->ops->invalidate_authorizer) {
- dout("calling invalidate_authorizer()\n");
- con->ops->invalidate_authorizer(con);
- }
-
- if (con->ops->fault)
- con->ops->fault(con);
}
dout("clear_standby %p and ++connect_seq\n", con);
con->state = CON_STATE_PREOPEN;
con->connect_seq++;
- WARN_ON(test_bit(CON_FLAG_WRITE_PENDING, &con->flags));
- WARN_ON(test_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags));
+ WARN_ON(con_flag_test(con, CON_FLAG_WRITE_PENDING));
+ WARN_ON(con_flag_test(con, CON_FLAG_KEEPALIVE_PENDING));
}
}
/* if there wasn't anything waiting to send before, queue
* new work */
- if (test_and_set_bit(CON_FLAG_WRITE_PENDING, &con->flags) == 0)
+ if (con_flag_test_and_set(con, CON_FLAG_WRITE_PENDING) == 0)
queue_con(con);
}
EXPORT_SYMBOL(ceph_con_send);
mutex_lock(&con->mutex);
clear_standby(con);
mutex_unlock(&con->mutex);
- if (test_and_set_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags) == 0 &&
- test_and_set_bit(CON_FLAG_WRITE_PENDING, &con->flags) == 0)
+ if (con_flag_test_and_set(con, CON_FLAG_KEEPALIVE_PENDING) == 0 &&
+ con_flag_test_and_set(con, CON_FLAG_WRITE_PENDING) == 0)
queue_con(con);
}
EXPORT_SYMBOL(ceph_con_keepalive);
m->page_alignment = 0;
m->pages = NULL;
m->pagelist = NULL;
+#ifdef CONFIG_BLOCK
m->bio = NULL;
m->bio_iter = NULL;
m->bio_seg = 0;
+#endif /* CONFIG_BLOCK */
m->trail = NULL;
/* front */
projects / firefly-linux-kernel-4.4.55.git / blobdiff