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ceph: messenger: change read_partial() to take "end" arg 

Make the second argument to read_partial() be the ending input byte
position rather than the beginning offset it now represents.  This
amounts to moving the addition "to + size" into the caller.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Alex Elder 2012-05-10 10:29:50 -05:00 committed by Alex Elder
parent e6cee71fac
commit fd51653f78
1 changed files with 38 additions and 22 deletions
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60
net/ceph/messenger.c
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@ -992,10 +992,8 @@ static int prepare_read_message(struct ceph_connection *con)
static int read_partial(struct ceph_connection *con,
int to, int size, void *object)
int end, int size, void *object)
{
int end = to + size;
while (con->in_base_pos < end) {
int left = end - con->in_base_pos;
int have = size - left;
@ -1013,40 +1011,52 @@ static int read_partial(struct ceph_connection *con,
*/
static int read_partial_banner(struct ceph_connection *con)
{
int ret, to = 0;
int size;
int end;
int ret;
dout("read_partial_banner %p at %d\n", con, con->in_base_pos);
/* peer's banner */
ret = read_partial(con, to, strlen(CEPH_BANNER), con->in_banner);
size = strlen(CEPH_BANNER);
end = size;
ret = read_partial(con, end, size, con->in_banner);
if (ret <= 0)
goto out;
to += strlen(CEPH_BANNER);
ret = read_partial(con, to, sizeof(con->actual_peer_addr),
&con->actual_peer_addr);
size = sizeof (con->actual_peer_addr);
end += size;
ret = read_partial(con, end, size, &con->actual_peer_addr);
if (ret <= 0)
goto out;
to += sizeof(con->actual_peer_addr);
ret = read_partial(con, to, sizeof(con->peer_addr_for_me),
&con->peer_addr_for_me);
size = sizeof (con->peer_addr_for_me);
end += size;
ret = read_partial(con, end, size, &con->peer_addr_for_me);
if (ret <= 0)
goto out;
out:
return ret;
}
static int read_partial_connect(struct ceph_connection *con)
{
int ret, to = 0;
int size;
int end;
int ret;
dout("read_partial_connect %p at %d\n", con, con->in_base_pos);
ret = read_partial(con, to, sizeof(con->in_reply), &con->in_reply);
size = sizeof (con->in_reply);
end = size;
ret = read_partial(con, end, size, &con->in_reply);
if (ret <= 0)
goto out;
to += sizeof(con->in_reply);
ret = read_partial(con, to, le32_to_cpu(con->in_reply.authorizer_len),
con->auth_reply_buf);
size = le32_to_cpu(con->in_reply.authorizer_len);
end += size;
ret = read_partial(con, end, size, con->auth_reply_buf);
if (ret <= 0)
goto out;
@ -1495,8 +1505,10 @@ static int process_connect(struct ceph_connection *con)
*/
static int read_partial_ack(struct ceph_connection *con)
{
return read_partial(con, 0, sizeof(con->in_temp_ack),
&con->in_temp_ack);
int size = sizeof (con->in_temp_ack);
int end = size;
return read_partial(con, end, size, &con->in_temp_ack);
}
@ -1629,8 +1641,9 @@ static int read_partial_message_bio(struct ceph_connection *con,
static int read_partial_message(struct ceph_connection *con)
{
struct ceph_msg *m = con->in_msg;
int size;
int end;
int ret;
int to;
unsigned front_len, middle_len, data_len;
bool do_datacrc = !con->msgr->nocrc;
int skip;
@ -1640,7 +1653,9 @@ static int read_partial_message(struct ceph_connection *con)
dout("read_partial_message con %p msg %p\n", con, m);
/* header */
ret = read_partial(con, 0, sizeof (con->in_hdr), &con->in_hdr);
size = sizeof (con->in_hdr);
end = size;
ret = read_partial(con, end, size, &con->in_hdr);
if (ret <= 0)
return ret;
@ -1755,8 +1770,9 @@ static int read_partial_message(struct ceph_connection *con)
}
/* footer */
to = sizeof (m->hdr);
ret = read_partial(con, to, sizeof (m->footer), &m->footer);
size = sizeof (m->footer);
end += size;
ret = read_partial(con, end, size, &m->footer);
if (ret <= 0)
return ret;