path: root/net/ceph
diff options
authorAlex Elder <elder@inktank.com>2013-01-31 16:02:00 -0600
committerSage Weil <sage@inktank.com>2013-02-13 18:29:11 -0800
commit9cbb1d7268afa997a7f96d779470cc57d28e1a13 (patch)
tree573dfaa8590be939671c73d3536fe031094d1b2e /net/ceph
parent1e32d34cfa6759df58b5f4002664241f2a0fef6a (diff)
libceph: don't require r_num_pages for bio requests
There is a check in the completion path for osd requests that ensures the number of pages allocated is enough to hold the amount of incoming data expected. For bio requests coming from rbd the "number of pages" is not really meaningful (although total length would be). So stop requiring that nr_pages be supplied for bio requests. This is done by checking whether the pages pointer is null before checking the value of nr_pages. Note that this value is passed on to the messenger, but there it's only used for debugging--it's never used for validation. While here, change another spot that used r_pages in a debug message inappropriately, and also invalidate the r_con_filling_msg pointer after dropping a reference to it. This resolves: http://tracker.ceph.com/issues/3875 Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to 'net/ceph')
1 files changed, 4 insertions, 3 deletions
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index ba03648533c..d9d58bbe9f9 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -137,10 +137,11 @@ void ceph_osdc_release_request(struct kref *kref)
if (req->r_request)
if (req->r_con_filling_msg) {
- dout("%s revoking pages %p from con %p\n", __func__,
- req->r_pages, req->r_con_filling_msg);
+ dout("%s revoking msg %p from con %p\n", __func__,
+ req->r_reply, req->r_con_filling_msg);
+ req->r_con_filling_msg = NULL;
if (req->r_reply)
@@ -1981,7 +1982,7 @@ static struct ceph_msg *get_reply(struct ceph_connection *con,
if (data_len > 0) {
int want = calc_pages_for(req->r_page_alignment, data_len);
- if (unlikely(req->r_num_pages < want)) {
+ if (req->r_pages && unlikely(req->r_num_pages < want)) {
pr_warning("tid %lld reply has %d bytes %d pages, we"
" had only %d pages ready\n", tid, data_len,
want, req->r_num_pages);