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authorIlya Dryomov <idryomov@gmail.com>2018-05-15 16:47:58 +0300
committerIlya Dryomov <idryomov@gmail.com>2018-06-04 21:45:57 +0300
commit66850df58529eefc61cb96b895991508547503bf (patch)
tree7faed8707d6ba961f6d0b3f9088c47cd15898e64 /net/ceph
parent8c6286f1c69743ebdb2ee15f9165f9c4d44eef49 (diff)
downloadlinux-66850df58529eefc61cb96b895991508547503bf.tar.xz
libceph: introduce ceph_osdc_abort_requests()
This will be used by the filesystem for "umount -f". Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'net/ceph')
-rw-r--r--net/ceph/osd_client.c67
1 files changed, 62 insertions, 5 deletions
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 08b5fc1f90cc..a7e090d2c957 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -1058,6 +1058,38 @@ EXPORT_SYMBOL(ceph_osdc_new_request);
DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
+/*
+ * Call @fn on each OSD request as long as @fn returns 0.
+ */
+static void for_each_request(struct ceph_osd_client *osdc,
+ int (*fn)(struct ceph_osd_request *req, void *arg),
+ void *arg)
+{
+ struct rb_node *n, *p;
+
+ for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
+ struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
+
+ for (p = rb_first(&osd->o_requests); p; ) {
+ struct ceph_osd_request *req =
+ rb_entry(p, struct ceph_osd_request, r_node);
+
+ p = rb_next(p);
+ if (fn(req, arg))
+ return;
+ }
+ }
+
+ for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
+ struct ceph_osd_request *req =
+ rb_entry(p, struct ceph_osd_request, r_node);
+
+ p = rb_next(p);
+ if (fn(req, arg))
+ return;
+ }
+}
+
static bool osd_homeless(struct ceph_osd *osd)
{
return osd->o_osd == CEPH_HOMELESS_OSD;
@@ -2165,9 +2197,9 @@ static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
struct ceph_osd_client *osdc = req->r_osdc;
struct ceph_osd *osd;
enum calc_target_result ct_res;
+ int err = 0;
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);
@@ -2183,7 +2215,10 @@ again:
goto promote;
}
- if (osdc->osdmap->epoch < osdc->epoch_barrier) {
+ if (osdc->abort_err) {
+ dout("req %p abort_err %d\n", req, osdc->abort_err);
+ err = osdc->abort_err;
+ } else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
osdc->epoch_barrier);
req->r_t.paused = true;
@@ -2208,7 +2243,7 @@ again:
req->r_t.paused = true;
maybe_request_map(osdc);
if (req->r_abort_on_full)
- need_abort = true;
+ err = -ENOSPC;
} else if (!osd_homeless(osd)) {
need_send = true;
} else {
@@ -2225,8 +2260,8 @@ again:
link_request(osd, req);
if (need_send)
send_request(req);
- else if (need_abort)
- complete_request(req, -ENOSPC);
+ else if (err)
+ complete_request(req, err);
mutex_unlock(&osd->lock);
if (ct_res == CALC_TARGET_POOL_DNE)
@@ -2340,6 +2375,28 @@ static void abort_request(struct ceph_osd_request *req, int err)
complete_request(req, err);
}
+static int abort_fn(struct ceph_osd_request *req, void *arg)
+{
+ int err = *(int *)arg;
+
+ abort_request(req, err);
+ return 0; /* continue iteration */
+}
+
+/*
+ * Abort all in-flight requests with @err and arrange for all future
+ * requests to be failed immediately.
+ */
+void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
+{
+ dout("%s osdc %p err %d\n", __func__, osdc, err);
+ down_write(&osdc->lock);
+ for_each_request(osdc, abort_fn, &err);
+ osdc->abort_err = err;
+ up_write(&osdc->lock);
+}
+EXPORT_SYMBOL(ceph_osdc_abort_requests);
+
static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
{
if (likely(eb > osdc->epoch_barrier)) {