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authorAlex Elder <elder@inktank.com>2013-04-02 12:09:50 -0500
committerSage Weil <sage@inktank.com>2013-05-01 21:18:03 -0700
commit98fa5dd883aadbb0020b68d0f9367ba152dfe511 (patch)
tree982654be5c409de9dd5a48521985e6533b8da4b4 /net/ceph
parente5975c7c8eb6aeab8d2f76a98c368081082795e0 (diff)
libceph: provide data length when preparing message
In prepare_message_data(), the length used to initialize the cursor is taken from the header of the message provided. I'm working toward not using the header data length field to determine length in outbound messages, and this is a step in that direction. For inbound messages this will be set to be the actual number of bytes that are arriving (which may be less than the total size of the data buffer available). This resolves: http://tracker.ceph.com/issues/4589 Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to 'net/ceph')
-rw-r--r--net/ceph/messenger.c19
1 files changed, 8 insertions, 11 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index fa9b4d0243a0..a6fda9532102 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -1076,18 +1076,14 @@ static bool ceph_msg_data_advance(struct ceph_msg_data *data, size_t bytes)
return new_piece;
}
-static void prepare_message_data(struct ceph_msg *msg)
+static void prepare_message_data(struct ceph_msg *msg, u32 data_len)
{
- size_t data_len;
-
BUG_ON(!msg);
-
- data_len = le32_to_cpu(msg->hdr.data_len);
BUG_ON(!data_len);
/* Initialize data cursor */
- ceph_msg_data_cursor_init(msg->data, data_len);
+ ceph_msg_data_cursor_init(msg->data, (size_t)data_len);
}
/*
@@ -1150,11 +1146,12 @@ static void prepare_write_message(struct ceph_connection *con)
m->hdr.seq = cpu_to_le64(++con->out_seq);
m->needs_out_seq = false;
}
+ WARN_ON(m->data_length != le32_to_cpu(m->hdr.data_len));
- dout("prepare_write_message %p seq %lld type %d len %d+%d+%d\n",
+ dout("prepare_write_message %p seq %lld type %d len %d+%d+%zd\n",
m, con->out_seq, le16_to_cpu(m->hdr.type),
le32_to_cpu(m->hdr.front_len), le32_to_cpu(m->hdr.middle_len),
- le32_to_cpu(m->hdr.data_len));
+ m->data_length);
BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len);
/* tag + hdr + front + middle */
@@ -1185,8 +1182,8 @@ static void prepare_write_message(struct ceph_connection *con)
/* is there a data payload? */
con->out_msg->footer.data_crc = 0;
- if (m->hdr.data_len) {
- prepare_message_data(con->out_msg);
+ if (m->data_length) {
+ prepare_message_data(con->out_msg, m->data_length);
con->out_more = 1; /* data + footer will follow */
} else {
/* no, queue up footer too and be done */
@@ -2231,7 +2228,7 @@ static int read_partial_message(struct ceph_connection *con)
/* prepare for data payload, if any */
if (data_len)
- prepare_message_data(con->in_msg);
+ prepare_message_data(con->in_msg, data_len);
}
/* front */

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