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libceph: don't mark footer complete before it is

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This is a nit, but prepare_write_message() sets the FOOTER_COMPLETE
flag before the CRC for the data portion (recorded in the footer)
has been completely computed.  Hold off setting the complete flag
until we've decided it's ready to send.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Alex Elder 2012-06-11 14:57:13 -05:00 committed by Sage Weil
parent 84ca8fc87f
commit fd154f3c75
1 changed files with 3 additions and 1 deletions
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4
net/ceph/messenger.c
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@ -592,6 +592,8 @@ static void prepare_write_message_footer(struct ceph_connection *con)
struct ceph_msg *m = con->out_msg;
int v = con->out_kvec_left;
m->footer.flags |= CEPH_MSG_FOOTER_COMPLETE;
dout("prepare_write_message_footer %p\n", con);
con->out_kvec_is_msg = true;
con->out_kvec[v].iov_base = &m->footer;
@ -665,7 +667,7 @@ static void prepare_write_message(struct ceph_connection *con)
/* fill in crc (except data pages), footer */
crc = crc32c(0, &m->hdr, offsetof(struct ceph_msg_header, crc));
con->out_msg->hdr.crc = cpu_to_le32(crc);
con->out_msg->footer.flags = CEPH_MSG_FOOTER_COMPLETE;
con->out_msg->footer.flags = 0;
crc = crc32c(0, m->front.iov_base, m->front.iov_len);
con->out_msg->footer.front_crc = cpu_to_le32(crc);