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ceph: more accurate statfs

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Improve accuracy of statfs reporting for Ceph filesystems comprising
exactly one data pool. In this case, the Ceph monitor can now report
the space usage for the single data pool instead of the global data
for the entire Ceph cluster. Include support for this message in
mon_client and leverage it in ceph/super.

Signed-off-by: Douglas Fuller <[email protected]>
Reviewed-by: Yan, Zheng <[email protected]>
Reviewed-by: Ilya Dryomov <[email protected]>
Signed-off-by: Ilya Dryomov <[email protected]>
This commit is contained in:
Douglas Fuller 2017-08-16 10:19:27 -04:00 • committed by Ilya Dryomov
commit 06d74376c8
4 changed files with 17 additions and 4 deletions
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6
net/ceph/mon_client.c
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@ -676,7 +676,8 @@ bad:
/*
* Do a synchronous statfs().
*/
int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf)
int ceph_monc_do_statfs(struct ceph_mon_client *monc, u64 data_pool,
struct ceph_statfs *buf)
{
struct ceph_mon_generic_request *req;
struct ceph_mon_statfs *h;
@ -696,6 +697,7 @@ int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf)
goto out;
req->u.st = buf;
req->request->hdr.version = cpu_to_le16(2);
mutex_lock(&monc->mutex);
register_generic_request(req);
@ -705,6 +707,8 @@ int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf)
h->monhdr.session_mon = cpu_to_le16(-1);
h->monhdr.session_mon_tid = 0;
h->fsid = monc->monmap->fsid;
h->contains_data_pool = (data_pool != CEPH_NOPOOL);
h->data_pool = cpu_to_le64(data_pool);
send_generic_request(monc, req);
mutex_unlock(&monc->mutex);