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| author | Jeff Layton <jlayton@redhat.com> | 2017-04-04 14:39:37 +0200 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2017-05-04 09:19:21 +0200 |
| commit | a1f4020aab10a6bddb2d061c960ebe52cdfa30b5 (patch) | |
| tree | f3c40a321710de3277ca3b99cda473b1e8c64f80 /net | |
| parent | libceph: remove req->r_replay_version (diff) | |
| download | linux-a1f4020aab10a6bddb2d061c960ebe52cdfa30b5.tar.xz linux-a1f4020aab10a6bddb2d061c960ebe52cdfa30b5.zip | |
libceph: allow requests to return immediately on full conditions if caller wishes
Usually, when the osd map is flagged as full or the pool is at quota,
write requests just hang. This is not what we want for cephfs, where
it would be better to simply report -ENOSPC back to userland instead
of stalling.
If the caller knows that it will want an immediate error return instead
of blocking on a full or at-quota error condition then allow it to set a
flag to request that behavior.
Set that flag in ceph_osdc_new_request (since ceph.ko is the only caller),
and on any other write request from ceph.ko.
A later patch will deal with requests that were submitted before the new
map showing the full condition came in.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ceph/osd_client.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index feb666c22381..52a2019a2b64 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -961,6 +961,7 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, truncate_size, truncate_seq); } + req->r_abort_on_full = true; req->r_flags = flags; req->r_base_oloc.pool = layout->pool_id; req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns); @@ -1627,6 +1628,7 @@ static void maybe_request_map(struct ceph_osd_client *osdc) ceph_monc_renew_subs(&osdc->client->monc); } +static void complete_request(struct ceph_osd_request *req, int err); static void send_map_check(struct ceph_osd_request *req); static void __submit_request(struct ceph_osd_request *req, bool wrlocked) @@ -1636,6 +1638,7 @@ static void __submit_request(struct ceph_osd_request *req, bool wrlocked) enum calc_target_result ct_res; bool need_send = false; bool promoted = false; + bool need_abort = false; WARN_ON(req->r_tid); dout("%s req %p wrlocked %d\n", __func__, req, wrlocked); @@ -1670,6 +1673,8 @@ again: pr_warn_ratelimited("FULL or reached pool quota\n"); req->r_t.paused = true; maybe_request_map(osdc); + if (req->r_abort_on_full) + need_abort = true; } else if (!osd_homeless(osd)) { need_send = true; } else { @@ -1686,6 +1691,8 @@ again: link_request(osd, req); if (need_send) send_request(req); + else if (need_abort) + complete_request(req, -ENOSPC); mutex_unlock(&osd->lock); if (ct_res == CALC_TARGET_POOL_DNE) |