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Commit 04c7d789 authored by Ilya Dryomov's avatar Ilya Dryomov
Browse files

libceph: make sure need_resend targets reflect latest map 



Otherwise we may miss events like PG splits, pool deletions, etc when
we get multiple incremental maps at once.  Because check_pool_dne() can
now be fed an unlinked request, finish_request() needed to be taught to
handle unlinked requests.

Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
parent a10bcb19

include/linux/ceph/osd_client.h

+1 −0
Original line number Diff line number Diff line
@@ -149,6 +149,7 @@ struct ceph_osd_request_target { 
	unsigned int flags;                /* CEPH_OSD_FLAG_* */

	bool paused;



	u32 epoch;

	u32 last_force_resend;



	int osd;

net/ceph/debugfs.c

+1 −1
Original line number Diff line number Diff line
@@ -166,7 +166,7 @@ static void dump_target(struct seq_file *s, struct ceph_osd_request_target *t) 
	seq_printf(s, "]/%d\t[", t->up.primary);

	for (i = 0; i < t->acting.size; i++)

		seq_printf(s, "%s%d", (!i ? "" : ","), t->acting.osds[i]);

	seq_printf(s, "]/%d\t", t->acting.primary);

	seq_printf(s, "]/%d\te%u\t", t->acting.primary, t->epoch);

	if (t->target_oloc.pool_ns) {

		seq_printf(s, "%*pE/%*pE\t0x%x",

			(int)t->target_oloc.pool_ns->len,

net/ceph/osd_client.c

+25 −8
Original line number Diff line number Diff line
@@ -386,6 +386,7 @@ static void target_copy(struct ceph_osd_request_target *dest, 
	dest->flags = src->flags;

	dest->paused = src->paused;



	dest->epoch = src->epoch;

	dest->last_force_resend = src->last_force_resend;



	dest->osd = src->osd;
@@ -1334,6 +1335,7 @@ static enum calc_target_result calc_target(struct ceph_osd_client *osdc, 
	enum calc_target_result ct_res;

	int ret;



	t->epoch = osdc->osdmap->epoch;

	pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);

	if (!pi) {

		t->osd = CEPH_HOMELESS_OSD;
@@ -1720,10 +1722,11 @@ static void send_request(struct ceph_osd_request *req) 


	encode_request_partial(req, req->r_request);



	dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d flags 0x%x attempt %d\n",

	dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n",

	     __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,

	     req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,

	     req->r_t.spgid.shard, osd->o_osd, req->r_flags, req->r_attempts);

	     req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,

	     req->r_attempts);



	req->r_t.paused = false;

	req->r_stamp = jiffies;
@@ -1863,13 +1866,12 @@ static void submit_request(struct ceph_osd_request *req, bool wrlocked) 
static void finish_request(struct ceph_osd_request *req)

{

	struct ceph_osd_client *osdc = req->r_osdc;

	struct ceph_osd *osd = req->r_osd;



	verify_osd_locked(osd);

	WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));

	dout("%s req %p tid %llu\n", __func__, req, req->r_tid);



	WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));

	unlink_request(osd, req);

	if (req->r_osd)

		unlink_request(req->r_osd, req);

	atomic_dec(&osdc->num_requests);



	/*
@@ -3356,8 +3358,25 @@ static void kick_requests(struct ceph_osd_client *osdc, 
			  struct list_head *need_resend_linger)

{

	struct ceph_osd_linger_request *lreq, *nlreq;

	enum calc_target_result ct_res;

	struct rb_node *n;



	/* make sure need_resend targets reflect latest map */

	for (n = rb_first(need_resend); n; ) {

		struct ceph_osd_request *req =

		    rb_entry(n, struct ceph_osd_request, r_node);



		n = rb_next(n);



		if (req->r_t.epoch < osdc->osdmap->epoch) {

			ct_res = calc_target(osdc, &req->r_t, NULL, false);

			if (ct_res == CALC_TARGET_POOL_DNE) {

				erase_request(need_resend, req);

				check_pool_dne(req);

			}

		}

	}



	for (n = rb_first(need_resend); n; ) {

		struct ceph_osd_request *req =

		    rb_entry(n, struct ceph_osd_request, r_node);
@@ -3366,8 +3385,6 @@ static void kick_requests(struct ceph_osd_client *osdc, 
		n = rb_next(n);

		erase_request(need_resend, req); /* before link_request() */



		WARN_ON(req->r_osd);

		calc_target(osdc, &req->r_t, NULL, false);

		osd = lookup_create_osd(osdc, req->r_t.osd, true);

		link_request(osd, req);

		if (!req->r_linger) {