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libceph: small refactor in write_partial_kvec() 

Make a small change in the code that counts down kvecs consumed by
a ceph_tcp_sendmsg() call.  Same functionality, just blocked out
a little differently.

Signed-off-by: Alex Elder <elder@dreamhost.com>
Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Alex Elder 2012-02-15 07:43:54 -06:00
parent fe3ad593e2
commit f42299e6c3
1 changed files with 12 additions and 11 deletions
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23
net/ceph/messenger.c
View File

@ -747,17 +747,18 @@ static int write_partial_kvec(struct ceph_connection *con)
con->out_kvec_bytes -= ret;
if (con->out_kvec_bytes == 0)
break; /* done */
while (ret > 0) {
if (ret >= con->out_kvec_cur->iov_len) {
ret -= con->out_kvec_cur->iov_len;
con->out_kvec_cur++;
con->out_kvec_left--;
} else {
con->out_kvec_cur->iov_len -= ret;
con->out_kvec_cur->iov_base += ret;
ret = 0;
break;
}
/* account for full iov entries consumed */
while (ret >= con->out_kvec_cur->iov_len) {
BUG_ON(!con->out_kvec_left);
ret -= con->out_kvec_cur->iov_len;
con->out_kvec_cur++;
con->out_kvec_left--;
}
/* and for a partially-consumed entry */
if (ret) {
con->out_kvec_cur->iov_len -= ret;
con->out_kvec_cur->iov_base += ret;
}
}
con->out_kvec_left = 0;