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ceph: only set message data pointers if non-empty

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Change it so we only assign outgoing data information for messages
if there is outgoing data to send.

This then allows us to add a few more (currently commented-out)
assertions.

This is related to:
    http://tracker.ceph.com/issues/4284

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Greg Farnum <greg@inktank.com>
This commit is contained in:
Alex Elder
2013-03-04 22:29:57 -06:00
committed by Sage Weil
parent 27fa83852b
commit ebf18f4709
3 changed files with 20 additions and 6 deletions
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13
fs/ceph/mds_client.c
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@@ -1721,7 +1721,11 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
msg->front.iov_len = p - msg->front.iov_base;
msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
ceph_msg_data_set_pages(msg, req->r_pages, req->r_data_len, 0);
if (req->r_data_len) {
/* outbound data set only by ceph_sync_setxattr() */
BUG_ON(!req->r_pages);
ceph_msg_data_set_pages(msg, req->r_pages, req->r_data_len, 0);
}
msg->hdr.data_len = cpu_to_le32(req->r_data_len);
msg->hdr.data_off = cpu_to_le16(0);
@@ -2603,10 +2607,13 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc,
goto fail;
}
ceph_msg_data_set_pagelist(reply, pagelist);
if (recon_state.flock)
reply->hdr.version = cpu_to_le16(2);
reply->hdr.data_len = cpu_to_le32(pagelist->length);
if (pagelist->length) {
/* set up outbound data if we have any */
reply->hdr.data_len = cpu_to_le32(pagelist->length);
ceph_msg_data_set_pagelist(reply, pagelist);
}
ceph_con_send(&session->s_con, reply);
mutex_unlock(&session->s_mutex);