Nothing too big here.
- define the size of the buffer used for consuming ignored
incoming data using a symbolic constant
- simplify the condition determining whether to unmap the page
in write_partial_msg_pages(): do it for crc but not if the
page is the zero page
Signed-off-by: Alex Elder <elder@xxxxxxxxxxxxx>
---
net/ceph/messenger.c | 13 +++++++++----
1 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 63f281f..27a1364 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -38,6 +38,11 @@ static char tag_keepalive = CEPH_MSGR_TAG_KEEPALIVE;
static struct lock_class_key socket_class;
#endif
+/*
+ * When skipping (ignoring) a block of input we read it into a "skip
+ * buffer," which is this many bytes in size.
+ */
+#define SKIP_BUF_SIZE 1024
static void queue_con(struct ceph_connection *con);
static void con_work(struct work_struct *);
@@ -889,8 +894,7 @@ static int write_partial_msg_pages(struct
ceph_connection *con)
MSG_DONTWAIT | MSG_NOSIGNAL |
MSG_MORE);
- if (do_crc &&
- (msg->pages || msg->pagelist || msg->bio || in_trail))
+ if (do_crc && kaddr != zero_page_address)
kunmap(page);
if (ret == -EAGAIN)
@@ -1979,8 +1983,9 @@ more:
*
* FIXME: there must be a better way to do this!
*/
- static char buf[1024];
- int skip = min(1024, -con->in_base_pos);
+ static char buf[SKIP_BUF_SIZE];
+ int skip = min((int) sizeof buf, -con->in_base_pos);
+
dout("skipping %d / %d bytes\n", skip, -con->in_base_pos);
ret = ceph_tcp_recvmsg(con->sock, buf, skip);
if (ret <= 0)
--
1.7.5.4
--
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