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libceph: wait_request_timeout() 

The unwatch timeout is currently implemented in rbd.  With
watch/unwatch code moving into libceph, we are going to need
a ceph_osdc_wait_request() variant with a timeout.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov 2016-04-28 16:07:26 +02:00
parent 3540bfdb30
commit 42b0696527
1 changed files with 25 additions and 17 deletions
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42
net/ceph/osd_client.c
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@ -2667,29 +2667,37 @@ void ceph_osdc_cancel_request(struct ceph_osd_request *req)
}
EXPORT_SYMBOL(ceph_osdc_cancel_request);
/*
* @timeout: in jiffies, 0 means "wait forever"
*/
static int wait_request_timeout(struct ceph_osd_request *req,
unsigned long timeout)
{
long left;
dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
left = wait_for_completion_interruptible_timeout(&req->r_completion,
ceph_timeout_jiffies(timeout));
if (left <= 0) {
left = left ?: -ETIMEDOUT;
ceph_osdc_cancel_request(req);
/* kludge - need to to wake ceph_osdc_sync() */
complete_all(&req->r_safe_completion);
} else {
left = req->r_result; /* completed */
}
return left;
}
/*
* wait for a request to complete
*/
int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req)
{
int rc;
dout("%s %p tid %llu\n", __func__, req, req->r_tid);
rc = wait_for_completion_interruptible(&req->r_completion);
if (rc < 0) {
dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
ceph_osdc_cancel_request(req);
/* kludge - need to to wake ceph_osdc_sync() */
complete_all(&req->r_safe_completion);
return rc;
}
dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
req->r_result);
return req->r_result;
return wait_request_timeout(req, 0);
}
EXPORT_SYMBOL(ceph_osdc_wait_request);