Merge git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

Pull ceph updates from Sage Weil:
 "There are some updates and cleanups to the CRUSH placement code, a bug
  fix with incremental maps, several cleanups and fixes from Josh Durgin
  in the RBD block device code, a series of cleanups and bug fixes from
  Alex Elder in the messenger code, and some miscellaneous bounds
  checking and gfp cleanups/fixes."

Fix up trivial conflicts in net/ceph/{messenger.c,osdmap.c} due to the
networking people preferring "unsigned int" over just "unsigned".

* git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (45 commits)
  libceph: fix pg_temp updates
  libceph: avoid unregistering osd request when not registered
  ceph: add auth buf in prepare_write_connect()
  ceph: rename prepare_connect_authorizer()
  ceph: return pointer from prepare_connect_authorizer()
  ceph: use info returned by get_authorizer
  ceph: have get_authorizer methods return pointers
  ceph: ensure auth ops are defined before use
  ceph: messenger: reduce args to create_authorizer
  ceph: define ceph_auth_handshake type
  ceph: messenger: check return from get_authorizer
  ceph: messenger: rework prepare_connect_authorizer()
  ceph: messenger: check prepare_write_connect() result
  ceph: don't set WRITE_PENDING too early
  ceph: drop msgr argument from prepare_write_connect()
  ceph: messenger: send banner in process_connect()
  ceph: messenger: reset connection kvec caller
  libceph: don't reset kvec in prepare_write_banner()
  ceph: ignore preferred_osd field
  ceph: fully initialize new layout
  ...

7 files changed, 235 insertions, 276 deletions

diff --git a/net/ceph/auth_none.c b/net/ceph/auth_none.c
index 214c2bb..925ca58 100644
--- a/net/ceph/auth_none.c
+++ b/net/ceph/auth_none.c
@@ -59,9 +59,7 @@ static int handle_reply(struct ceph_auth_client *ac, int result,
  */
 static int ceph_auth_none_create_authorizer(
 	struct ceph_auth_client *ac, int peer_type,
-	struct ceph_authorizer **a,
-	void **buf, size_t *len,
-	void **reply_buf, size_t *reply_len)
+	struct ceph_auth_handshake *auth)
 {
 	struct ceph_auth_none_info *ai = ac->private;
 	struct ceph_none_authorizer *au = &ai->au;
@@ -82,11 +80,12 @@ static int ceph_auth_none_create_authorizer(
 		dout("built authorizer len %d\n", au->buf_len);
 	}
 
-	*a = (struct ceph_authorizer *)au;
-	*buf = au->buf;
-	*len = au->buf_len;
-	*reply_buf = au->reply_buf;
-	*reply_len = sizeof(au->reply_buf);
+	auth->authorizer = (struct ceph_authorizer *) au;
+	auth->authorizer_buf = au->buf;
+	auth->authorizer_buf_len = au->buf_len;
+	auth->authorizer_reply_buf = au->reply_buf;
+	auth->authorizer_reply_buf_len = sizeof (au->reply_buf);
+
 	return 0;
 
 bad2:
diff --git a/net/ceph/auth_x.c b/net/ceph/auth_x.c
index 1587dc6..a16bf14 100644
--- a/net/ceph/auth_x.c
+++ b/net/ceph/auth_x.c
@@ -526,9 +526,7 @@ static int ceph_x_handle_reply(struct ceph_auth_client *ac, int result,
 
 static int ceph_x_create_authorizer(
 	struct ceph_auth_client *ac, int peer_type,
-	struct ceph_authorizer **a,
-	void **buf, size_t *len,
-	void **reply_buf, size_t *reply_len)
+	struct ceph_auth_handshake *auth)
 {
 	struct ceph_x_authorizer *au;
 	struct ceph_x_ticket_handler *th;
@@ -548,11 +546,12 @@ static int ceph_x_create_authorizer(
 		return ret;
 	}
 
-	*a = (struct ceph_authorizer *)au;
-	*buf = au->buf->vec.iov_base;
-	*len = au->buf->vec.iov_len;
-	*reply_buf = au->reply_buf;
-	*reply_len = sizeof(au->reply_buf);
+	auth->authorizer = (struct ceph_authorizer *) au;
+	auth->authorizer_buf = au->buf->vec.iov_base;
+	auth->authorizer_buf_len = au->buf->vec.iov_len;
+	auth->authorizer_reply_buf = au->reply_buf;
+	auth->authorizer_reply_buf_len = sizeof (au->reply_buf);
+
 	return 0;
 }
 
diff --git a/net/ceph/crush/crush.c b/net/ceph/crush/crush.c
index d6ebb13..0896132 100644
--- a/net/ceph/crush/crush.c
+++ b/net/ceph/crush/crush.c
@@ -26,9 +26,9 @@ const char *crush_bucket_alg_name(int alg)
  * @b: bucket pointer
  * @p: item index in bucket
  */
-int crush_get_bucket_item_weight(struct crush_bucket *b, int p)
+int crush_get_bucket_item_weight(const struct crush_bucket *b, int p)
 {
-	if (p >= b->size)
+	if ((__u32)p >= b->size)
 		return 0;
 
 	switch (b->alg) {
@@ -37,38 +37,13 @@ int crush_get_bucket_item_weight(struct crush_bucket *b, int p)
 	case CRUSH_BUCKET_LIST:
 		return ((struct crush_bucket_list *)b)->item_weights[p];
 	case CRUSH_BUCKET_TREE:
-		if (p & 1)
-			return ((struct crush_bucket_tree *)b)->node_weights[p];
-		return 0;
+		return ((struct crush_bucket_tree *)b)->node_weights[crush_calc_tree_node(p)];
 	case CRUSH_BUCKET_STRAW:
 		return ((struct crush_bucket_straw *)b)->item_weights[p];
 	}
 	return 0;
 }
 
-/**
- * crush_calc_parents - Calculate parent vectors for the given crush map.
- * @map: crush_map pointer
- */
-void crush_calc_parents(struct crush_map *map)
-{
-	int i, b, c;
-
-	for (b = 0; b < map->max_buckets; b++) {
-		if (map->buckets[b] == NULL)
-			continue;
-		for (i = 0; i < map->buckets[b]->size; i++) {
-			c = map->buckets[b]->items[i];
-			BUG_ON(c >= map->max_devices ||
-			       c < -map->max_buckets);
-			if (c >= 0)
-				map->device_parents[c] = map->buckets[b]->id;
-			else
-				map->bucket_parents[-1-c] = map->buckets[b]->id;
-		}
-	}
-}
-
 void crush_destroy_bucket_uniform(struct crush_bucket_uniform *b)
 {
 	kfree(b->h.perm);
@@ -87,6 +62,8 @@ void crush_destroy_bucket_list(struct crush_bucket_list *b)
 
 void crush_destroy_bucket_tree(struct crush_bucket_tree *b)
 {
+	kfree(b->h.perm);
+	kfree(b->h.items);
 	kfree(b->node_weights);
 	kfree(b);
 }
@@ -124,10 +101,9 @@ void crush_destroy_bucket(struct crush_bucket *b)
  */
 void crush_destroy(struct crush_map *map)
 {
-	int b;
-
 	/* buckets */
 	if (map->buckets) {
+		__s32 b;
 		for (b = 0; b < map->max_buckets; b++) {
 			if (map->buckets[b] == NULL)
 				continue;
@@ -138,13 +114,12 @@ void crush_destroy(struct crush_map *map)
 
 	/* rules */
 	if (map->rules) {
+		__u32 b;
 		for (b = 0; b < map->max_rules; b++)
 			kfree(map->rules[b]);
 		kfree(map->rules);
 	}
 
-	kfree(map->bucket_parents);
-	kfree(map->device_parents);
 	kfree(map);
 }
 
diff --git a/net/ceph/crush/mapper.c b/net/ceph/crush/mapper.c
index 363f8f7..d7edc24 100644
--- a/net/ceph/crush/mapper.c
+++ b/net/ceph/crush/mapper.c
@@ -33,9 +33,9 @@
  * @type: storage ruleset type (user defined)
  * @size: output set size
  */
-int crush_find_rule(struct crush_map *map, int ruleset, int type, int size)
+int crush_find_rule(const struct crush_map *map, int ruleset, int type, int size)
 {
-	int i;
+	__u32 i;
 
 	for (i = 0; i < map->max_rules; i++) {
 		if (map->rules[i] &&
@@ -73,7 +73,7 @@ static int bucket_perm_choose(struct crush_bucket *bucket,
 	unsigned int i, s;
 
 	/* start a new permutation if @x has changed */
-	if (bucket->perm_x != x || bucket->perm_n == 0) {
+	if (bucket->perm_x != (__u32)x || bucket->perm_n == 0) {
 		dprintk("bucket %d new x=%d\n", bucket->id, x);
 		bucket->perm_x = x;
 
@@ -153,8 +153,8 @@ static int bucket_list_choose(struct crush_bucket_list *bucket,
 			return bucket->h.items[i];
 	}
 
-	BUG_ON(1);
-	return 0;
+	dprintk("bad list sums for bucket %d\n", bucket->h.id);
+	return bucket->h.items[0];
 }
 
 
@@ -220,7 +220,7 @@ static int bucket_tree_choose(struct crush_bucket_tree *bucket,
 static int bucket_straw_choose(struct crush_bucket_straw *bucket,
 			       int x, int r)
 {
-	int i;
+	__u32 i;
 	int high = 0;
 	__u64 high_draw = 0;
 	__u64 draw;
@@ -240,6 +240,7 @@ static int bucket_straw_choose(struct crush_bucket_straw *bucket,
 static int crush_bucket_choose(struct crush_bucket *in, int x, int r)
 {
 	dprintk(" crush_bucket_choose %d x=%d r=%d\n", in->id, x, r);
+	BUG_ON(in->size == 0);
 	switch (in->alg) {
 	case CRUSH_BUCKET_UNIFORM:
 		return bucket_uniform_choose((struct crush_bucket_uniform *)in,
@@ -254,7 +255,7 @@ static int crush_bucket_choose(struct crush_bucket *in, int x, int r)
 		return bucket_straw_choose((struct crush_bucket_straw *)in,
 					   x, r);
 	default:
-		BUG_ON(1);
+		dprintk("unknown bucket %d alg %d\n", in->id, in->alg);
 		return in->items[0];
 	}
 }
@@ -263,7 +264,7 @@ static int crush_bucket_choose(struct crush_bucket *in, int x, int r)
  * true if device is marked "out" (failed, fully offloaded)
  * of the cluster
  */
-static int is_out(struct crush_map *map, __u32 *weight, int item, int x)
+static int is_out(const struct crush_map *map, const __u32 *weight, int item, int x)
 {
 	if (weight[item] >= 0x10000)
 		return 0;
@@ -288,16 +289,16 @@ static int is_out(struct crush_map *map, __u32 *weight, int item, int x)
  * @recurse_to_leaf: true if we want one device under each item of given type
  * @out2: second output vector for leaf items (if @recurse_to_leaf)
  */
-static int crush_choose(struct crush_map *map,
+static int crush_choose(const struct crush_map *map,
 			struct crush_bucket *bucket,
-			__u32 *weight,
+			const __u32 *weight,
 			int x, int numrep, int type,
 			int *out, int outpos,
 			int firstn, int recurse_to_leaf,
 			int *out2)
 {
 	int rep;
-	int ftotal, flocal;
+	unsigned int ftotal, flocal;
 	int retry_descent, retry_bucket, skip_rep;
 	struct crush_bucket *in = bucket;
 	int r;
@@ -305,7 +306,7 @@ static int crush_choose(struct crush_map *map,
 	int item = 0;
 	int itemtype;
 	int collide, reject;
-	const int orig_tries = 5; /* attempts before we fall back to search */
+	const unsigned int orig_tries = 5; /* attempts before we fall back to search */
 
 	dprintk("CHOOSE%s bucket %d x %d outpos %d numrep %d\n", recurse_to_leaf ? "_LEAF" : "",
 		bucket->id, x, outpos, numrep);
@@ -326,7 +327,7 @@ static int crush_choose(struct crush_map *map,
 				r = rep;
 				if (in->alg == CRUSH_BUCKET_UNIFORM) {
 					/* be careful */
-					if (firstn || numrep >= in->size)
+					if (firstn || (__u32)numrep >= in->size)
 						/* r' = r + f_total */
 						r += ftotal;
 					else if (in->size % numrep == 0)
@@ -355,7 +356,11 @@ static int crush_choose(struct crush_map *map,
 					item = bucket_perm_choose(in, x, r);
 				else
 					item = crush_bucket_choose(in, x, r);
-				BUG_ON(item >= map->max_devices);
+				if (item >= map->max_devices) {
+					dprintk("   bad item %d\n", item);
+					skip_rep = 1;
+					break;
+				}
 
 				/* desired type? */
 				if (item < 0)
@@ -366,8 +371,12 @@ static int crush_choose(struct crush_map *map,
 
 				/* keep going? */
 				if (itemtype != type) {
-					BUG_ON(item >= 0 ||
-					       (-1-item) >= map->max_buckets);
+					if (item >= 0 ||
+					    (-1-item) >= map->max_buckets) {
+						dprintk("   bad item type %d\n", type);
+						skip_rep = 1;
+						break;
+					}
 					in = map->buckets[-1-item];
 					retry_bucket = 1;
 					continue;
@@ -416,7 +425,7 @@ reject:
 					if (collide && flocal < 3)
 						/* retry locally a few times */
 						retry_bucket = 1;
-					else if (flocal < in->size + orig_tries)
+					else if (flocal <= in->size + orig_tries)
 						/* exhaustive bucket search */
 						retry_bucket = 1;
 					else if (ftotal < 20)
@@ -426,7 +435,7 @@ reject:
 						/* else give up */
 						skip_rep = 1;
 					dprintk("  reject %d  collide %d  "
-						"ftotal %d  flocal %d\n",
+						"ftotal %u  flocal %u\n",
 						reject, collide, ftotal,
 						flocal);
 				}
@@ -455,15 +464,12 @@ reject:
  * @x: hash input
  * @result: pointer to result vector
  * @result_max: maximum result size
- * @force: force initial replica choice; -1 for none
  */
-int crush_do_rule(struct crush_map *map,
+int crush_do_rule(const struct crush_map *map,
 		  int ruleno, int x, int *result, int result_max,
-		  int force, __u32 *weight)
+		  const __u32 *weight)
 {
 	int result_len;
-	int force_context[CRUSH_MAX_DEPTH];
-	int force_pos = -1;
 	int a[CRUSH_MAX_SET];
 	int b[CRUSH_MAX_SET];
 	int c[CRUSH_MAX_SET];
@@ -474,66 +480,44 @@ int crush_do_rule(struct crush_map *map,
 	int osize;
 	int *tmp;
 	struct crush_rule *rule;
-	int step;
+	__u32 step;
 	int i, j;
 	int numrep;
 	int firstn;
 
-	BUG_ON(ruleno >= map->max_rules);
+	if ((__u32)ruleno >= map->max_rules) {
+		dprintk(" bad ruleno %d\n", ruleno);
+		return 0;
+	}
 
 	rule = map->rules[ruleno];
 	result_len = 0;
 	w = a;
 	o = b;
 
-	/*
-	 * determine hierarchical context of force, if any.  note
-	 * that this may or may not correspond to the specific types
-	 * referenced by the crush rule.
-	 */
-	if (force >= 0 &&
-	    force < map->max_devices &&
-	    map->device_parents[force] != 0 &&
-	    !is_out(map, weight, force, x)) {
-		while (1) {
-			force_context[++force_pos] = force;
-			if (force >= 0)
-				force = map->device_parents[force];
-			else
-				force = map->bucket_parents[-1-force];
-			if (force == 0)
-				break;
-		}
-	}
-
 	for (step = 0; step < rule->len; step++) {
+		struct crush_rule_step *curstep = &rule->steps[step];
+
 		firstn = 0;
-		switch (rule->steps[step].op) {
+		switch (curstep->op) {
 		case CRUSH_RULE_TAKE:
-			w[0] = rule->steps[step].arg1;
-
-			/* find position in force_context/hierarchy */
-			while (force_pos >= 0 &&
-			       force_context[force_pos] != w[0])
-				force_pos--;
-			/* and move past it */
-			if (force_pos >= 0)
-				force_pos--;
-
+			w[0] = curstep->arg1;
 			wsize = 1;
 			break;
 
 		case CRUSH_RULE_CHOOSE_LEAF_FIRSTN:
 		case CRUSH_RULE_CHOOSE_FIRSTN:
 			firstn = 1;
+			/* fall through */
 		case CRUSH_RULE_CHOOSE_LEAF_INDEP:
 		case CRUSH_RULE_CHOOSE_INDEP:
-			BUG_ON(wsize == 0);
+			if (wsize == 0)
+				break;
 
 			recurse_to_leaf =
-				rule->steps[step].op ==
+				curstep->op ==
 				 CRUSH_RULE_CHOOSE_LEAF_FIRSTN ||
-				rule->steps[step].op ==
+				curstep->op ==
 				CRUSH_RULE_CHOOSE_LEAF_INDEP;
 
 			/* reset output */
@@ -545,32 +529,18 @@ int crush_do_rule(struct crush_map *map,
 				 * basically, numrep <= 0 means relative to
 				 * the provided result_max
 				 */
-				numrep = rule->steps[step].arg1;
+				numrep = curstep->arg1;
 				if (numrep <= 0) {
 					numrep += result_max;
 					if (numrep <= 0)
 						continue;
 				}
 				j = 0;
-				if (osize == 0 && force_pos >= 0) {
-					/* skip any intermediate types */
-					while (force_pos &&
-					       force_context[force_pos] < 0 &&
-					       rule->steps[step].arg2 !=
-					       map->buckets[-1 -
-					       force_context[force_pos]]->type)
-						force_pos--;
-					o[osize] = force_context[force_pos];
-					if (recurse_to_leaf)
-						c[osize] = force_context[0];
-					j++;
-					force_pos--;
-				}
 				osize += crush_choose(map,
 						      map->buckets[-1-w[i]],
 						      weight,
 						      x, numrep,
-						      rule->steps[step].arg2,
+						      curstep->arg2,
 						      o+osize, j,
 						      firstn,
 						      recurse_to_leaf, c+osize);
@@ -597,7 +567,9 @@ int crush_do_rule(struct crush_map *map,
 			break;
 
 		default:
-			BUG_ON(1);
+			dprintk(" unknown op %d at step %d\n",
+				curstep->op, step);
+			break;
 		}
 	}
 	return result_len;
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 36fa6bf..524f4e4 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -653,54 +653,57 @@ static void prepare_write_keepalive(struct ceph_connection *con)
  * Connection negotiation.
  */
 
-static int prepare_connect_authorizer(struct ceph_connection *con)
+static struct ceph_auth_handshake *get_connect_authorizer(struct ceph_connection *con,
+						int *auth_proto)
 {
-	void *auth_buf;
-	int auth_len = 0;
-	int auth_protocol = 0;
+	struct ceph_auth_handshake *auth;
+
+	if (!con->ops->get_authorizer) {
+		con->out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN;
+		con->out_connect.authorizer_len = 0;
+
+		return NULL;
+	}
+
+	/* Can't hold the mutex while getting authorizer */
 
 	mutex_unlock(&con->mutex);
-	if (con->ops->get_authorizer)
-		con->ops->get_authorizer(con, &auth_buf, &auth_len,
-					 &auth_protocol, &con->auth_reply_buf,
-					 &con->auth_reply_buf_len,
-					 con->auth_retry);
+
+	auth = con->ops->get_authorizer(con, auth_proto, con->auth_retry);
+
 	mutex_lock(&con->mutex);
 
-	if (test_bit(CLOSED, &con->state) ||
-	    test_bit(OPENING, &con->state))
-		return -EAGAIN;
+	if (IS_ERR(auth))
+		return auth;
+	if (test_bit(CLOSED, &con->state) || test_bit(OPENING, &con->state))
+		return ERR_PTR(-EAGAIN);
 
-	con->out_connect.authorizer_protocol = cpu_to_le32(auth_protocol);
-	con->out_connect.authorizer_len = cpu_to_le32(auth_len);
+	con->auth_reply_buf = auth->authorizer_reply_buf;
+	con->auth_reply_buf_len = auth->authorizer_reply_buf_len;
 
-	if (auth_len)
-		ceph_con_out_kvec_add(con, auth_len, auth_buf);
 
-	return 0;
+	return auth;
 }
 
 /*
  * We connected to a peer and are saying hello.
  */
-static void prepare_write_banner(struct ceph_messenger *msgr,
-				 struct ceph_connection *con)
+static void prepare_write_banner(struct ceph_connection *con)
 {
-	ceph_con_out_kvec_reset(con);
 	ceph_con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER);
-	ceph_con_out_kvec_add(con, sizeof (msgr->my_enc_addr),
-					&msgr->my_enc_addr);
+	ceph_con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr),
+					&con->msgr->my_enc_addr);
 
 	con->out_more = 0;
 	set_bit(WRITE_PENDING, &con->state);
 }
 
-static int prepare_write_connect(struct ceph_messenger *msgr,
-				 struct ceph_connection *con,
-				 int include_banner)
+static int prepare_write_connect(struct ceph_connection *con)
 {
 	unsigned int global_seq = get_global_seq(con->msgr, 0);
 	int proto;
+	int auth_proto;
+	struct ceph_auth_handshake *auth;
 
 	switch (con->peer_name.type) {
 	case CEPH_ENTITY_TYPE_MON:
@@ -719,23 +722,32 @@ static int prepare_write_connect(struct ceph_messenger *msgr,
 	dout("prepare_write_connect %p cseq=%d gseq=%d proto=%d\n", con,
 	     con->connect_seq, global_seq, proto);
 
-	con->out_connect.features = cpu_to_le64(msgr->supported_features);
+	con->out_connect.features = cpu_to_le64(con->msgr->supported_features);
 	con->out_connect.host_type = cpu_to_le32(CEPH_ENTITY_TYPE_CLIENT);
 	con->out_connect.connect_seq = cpu_to_le32(con->connect_seq);
 	con->out_connect.global_seq = cpu_to_le32(global_seq);
 	con->out_connect.protocol_version = cpu_to_le32(proto);
 	con->out_connect.flags = 0;
 
-	if (include_banner)
-		prepare_write_banner(msgr, con);
-	else
-		ceph_con_out_kvec_reset(con);
-	ceph_con_out_kvec_add(con, sizeof (con->out_connect), &con->out_connect);
+	auth_proto = CEPH_AUTH_UNKNOWN;
+	auth = get_connect_authorizer(con, &auth_proto);
+	if (IS_ERR(auth))
+		return PTR_ERR(auth);
+
+	con->out_connect.authorizer_protocol = cpu_to_le32(auth_proto);
+	con->out_connect.authorizer_len = auth ?
+		cpu_to_le32(auth->authorizer_buf_len) : 0;
+
+	ceph_con_out_kvec_add(con, sizeof (con->out_connect),
+					&con->out_connect);
+	if (auth && auth->authorizer_buf_len)
+		ceph_con_out_kvec_add(con, auth->authorizer_buf_len,
+					auth->authorizer_buf);
 
 	con->out_more = 0;
 	set_bit(WRITE_PENDING, &con->state);
 
-	return prepare_connect_authorizer(con);
+	return 0;
 }
 
 /*
@@ -992,11 +1004,10 @@ static int prepare_read_message(struct ceph_connection *con)
 
 
 static int read_partial(struct ceph_connection *con,
-			int *to, int size, void *object)
+			int end, int size, void *object)
 {
-	*to += size;
-	while (con->in_base_pos < *to) {
-		int left = *to - con->in_base_pos;
+	while (con->in_base_pos < end) {
+		int left = end - con->in_base_pos;
 		int have = size - left;
 		int ret = ceph_tcp_recvmsg(con->sock, object + have, left);
 		if (ret <= 0)
@@ -1012,37 +1023,52 @@ static int read_partial(struct ceph_connection *con,
  */
 static int read_partial_banner(struct ceph_connection *con)
 {
-	int ret, to = 0;
+	int size;
+	int end;
+	int ret;
 
 	dout("read_partial_banner %p at %d\n", con, con->in_base_pos);
 
 	/* peer's banner */
-	ret = read_partial(con, &to, strlen(CEPH_BANNER), con->in_banner);
+	size = strlen(CEPH_BANNER);
+	end = size;
+	ret = read_partial(con, end, size, con->in_banner);
 	if (ret <= 0)
 		goto out;
-	ret = read_partial(con, &to, sizeof(con->actual_peer_addr),
-			   &con->actual_peer_addr);
+
+	size = sizeof (con->actual_peer_addr);
+	end += size;
+	ret = read_partial(con, end, size, &con->actual_peer_addr);
 	if (ret <= 0)
 		goto out;
-	ret = read_partial(con, &to, sizeof(con->peer_addr_for_me),
-			   &con->peer_addr_for_me);
+
+	size = sizeof (con->peer_addr_for_me);
+	end += size;
+	ret = read_partial(con, end, size, &con->peer_addr_for_me);
 	if (ret <= 0)
 		goto out;
+
 out:
 	return ret;
 }
 
 static int read_partial_connect(struct ceph_connection *con)
 {
-	int ret, to = 0;
+	int size;
+	int end;
+	int ret;
 
 	dout("read_partial_connect %p at %d\n", con, con->in_base_pos);
 
-	ret = read_partial(con, &to, sizeof(con->in_reply), &con->in_reply);
+	size = sizeof (con->in_reply);
+	end = size;
+	ret = read_partial(con, end, size, &con->in_reply);
 	if (ret <= 0)
 		goto out;
-	ret = read_partial(con, &to, le32_to_cpu(con->in_reply.authorizer_len),
-			   con->auth_reply_buf);
+
+	size = le32_to_cpu(con->in_reply.authorizer_len);
+	end += size;
+	ret = read_partial(con, end, size, con->auth_reply_buf);
 	if (ret <= 0)
 		goto out;
 
@@ -1377,7 +1403,8 @@ static int process_connect(struct ceph_connection *con)
 			return -1;
 		}
 		con->auth_retry = 1;
-		ret = prepare_write_connect(con->msgr, con, 0);
+		ceph_con_out_kvec_reset(con);
+		ret = prepare_write_connect(con);
 		if (ret < 0)
 			return ret;
 		prepare_read_connect(con);
@@ -1397,7 +1424,10 @@ static int process_connect(struct ceph_connection *con)
 		       ENTITY_NAME(con->peer_name),
 		       ceph_pr_addr(&con->peer_addr.in_addr));
 		reset_connection(con);
-		prepare_write_connect(con->msgr, con, 0);
+		ceph_con_out_kvec_reset(con);
+		ret = prepare_write_connect(con);
+		if (ret < 0)
+			return ret;
 		prepare_read_connect(con);
 
 		/* Tell ceph about it. */
@@ -1420,7 +1450,10 @@ static int process_connect(struct ceph_connection *con)
 		     le32_to_cpu(con->out_connect.connect_seq),
 		     le32_to_cpu(con->in_connect.connect_seq));
 		con->connect_seq = le32_to_cpu(con->in_connect.connect_seq);
-		prepare_write_connect(con->msgr, con, 0);
+		ceph_con_out_kvec_reset(con);
+		ret = prepare_write_connect(con);
+		if (ret < 0)
+			return ret;
 		prepare_read_connect(con);
 		break;
 
@@ -1434,7 +1467,10 @@ static int process_connect(struct ceph_connection *con)
 		     le32_to_cpu(con->in_connect.global_seq));
 		get_global_seq(con->msgr,
 			       le32_to_cpu(con->in_connect.global_seq));
-		prepare_write_connect(con->msgr, con, 0);
+		ceph_con_out_kvec_reset(con);
+		ret = prepare_write_connect(con);
+		if (ret < 0)
+			return ret;
 		prepare_read_connect(con);
 		break;
 
@@ -1491,10 +1527,10 @@ static int process_connect(struct ceph_connection *con)
  */
 static int read_partial_ack(struct ceph_connection *con)
 {
-	int to = 0;
+	int size = sizeof (con->in_temp_ack);
+	int end = size;
 
-	return read_partial(con, &to, sizeof(con->in_temp_ack),
-			    &con->in_temp_ack);
+	return read_partial(con, end, size, &con->in_temp_ack);
 }
 
 
@@ -1627,8 +1663,9 @@ static int read_partial_message_bio(struct ceph_connection *con,
 static int read_partial_message(struct ceph_connection *con)
 {
 	struct ceph_msg *m = con->in_msg;
+	int size;
+	int end;
 	int ret;
-	int to, left;
 	unsigned int front_len, middle_len, data_len;
 	bool do_datacrc = !con->msgr->nocrc;
 	int skip;
@@ -1638,15 +1675,11 @@ static int read_partial_message(struct ceph_connection *con)
 	dout("read_partial_message con %p msg %p\n", con, m);
 
 	/* header */
-	while (con->in_base_pos < sizeof(con->in_hdr)) {
-		left = sizeof(con->in_hdr) - con->in_base_pos;
-		ret = ceph_tcp_recvmsg(con->sock,
-				       (char *)&con->in_hdr + con->in_base_pos,
-				       left);
-		if (ret <= 0)
-			return ret;
-		con->in_base_pos += ret;
-	}
+	size = sizeof (con->in_hdr);
+	end = size;
+	ret = read_partial(con, end, size, &con->in_hdr);
+	if (ret <= 0)
+		return ret;
 
 	crc = crc32c(0, &con->in_hdr, offsetof(struct ceph_msg_header, crc));
 	if (cpu_to_le32(crc) != con->in_hdr.crc) {
@@ -1759,16 +1792,12 @@ static int read_partial_message(struct ceph_connection *con)
 	}
 
 	/* footer */
-	to = sizeof(m->hdr) + sizeof(m->footer);
-	while (con->in_base_pos < to) {
-		left = to - con->in_base_pos;
-		ret = ceph_tcp_recvmsg(con->sock, (char *)&m->footer +
-				       (con->in_base_pos - sizeof(m->hdr)),
-				       left);
-		if (ret <= 0)
-			return ret;
-		con->in_base_pos += ret;
-	}
+	size = sizeof (m->footer);
+	end += size;
+	ret = read_partial(con, end, size, &m->footer);
+	if (ret <= 0)
+		return ret;
+
 	dout("read_partial_message got msg %p %d (%u) + %d (%u) + %d (%u)\n",
 	     m, front_len, m->footer.front_crc, middle_len,
 	     m->footer.middle_crc, data_len, m->footer.data_crc);
@@ -1835,7 +1864,6 @@ static void process_message(struct ceph_connection *con)
  */
 static int try_write(struct ceph_connection *con)
 {
-	struct ceph_messenger *msgr = con->msgr;
 	int ret = 1;
 
 	dout("try_write start %p state %lu nref %d\n", con, con->state,
@@ -1846,7 +1874,11 @@ more:
 
 	/* open the socket first? */
 	if (con->sock == NULL) {
-		prepare_write_connect(msgr, con, 1);
+		ceph_con_out_kvec_reset(con);
+		prepare_write_banner(con);
+		ret = prepare_write_connect(con);
+		if (ret < 0)
+			goto out;
 		prepare_read_banner(con);
 		set_bit(CONNECTING, &con->state);
 		clear_bit(NEGOTIATING, &con->state);
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 1b0ef3c..1ffebed 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -278,7 +278,7 @@ static void osd_req_encode_op(struct ceph_osd_request *req,
 {
 	dst->op = cpu_to_le16(src->op);
 
-	switch (dst->op) {
+	switch (src->op) {
 	case CEPH_OSD_OP_READ:
 	case CEPH_OSD_OP_WRITE:
 		dst->extent.offset =
@@ -664,11 +664,11 @@ static void put_osd(struct ceph_osd *osd)
 {
 	dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
 	     atomic_read(&osd->o_ref) - 1);
-	if (atomic_dec_and_test(&osd->o_ref)) {
+	if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
 		struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
 
-		if (osd->o_authorizer)
-			ac->ops->destroy_authorizer(ac, osd->o_authorizer);
+		if (ac->ops && ac->ops->destroy_authorizer)
+			ac->ops->destroy_authorizer(ac, osd->o_auth.authorizer);
 		kfree(osd);
 	}
 }
@@ -841,6 +841,12 @@ static void register_request(struct ceph_osd_client *osdc,
 static void __unregister_request(struct ceph_osd_client *osdc,
 				 struct ceph_osd_request *req)
 {
+	if (RB_EMPTY_NODE(&req->r_node)) {
+		dout("__unregister_request %p tid %lld not registered\n",
+			req, req->r_tid);
+		return;
+	}
+
 	dout("__unregister_request %p tid %lld\n", req, req->r_tid);
 	rb_erase(&req->r_node, &osdc->requests);
 	osdc->num_requests--;
@@ -2108,37 +2114,32 @@ static void put_osd_con(struct ceph_connection *con)
 /*
  * authentication
  */
-static int get_authorizer(struct ceph_connection *con,
-			  void **buf, int *len, int *proto,
-			  void **reply_buf, int *reply_len, int force_new)
+/*
+ * Note: returned pointer is the address of a structure that's
+ * managed separately.  Caller must *not* attempt to free it.
+ */
+static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
+					int *proto, int force_new)
 {
 	struct ceph_osd *o = con->private;
 	struct ceph_osd_client *osdc = o->o_osdc;
 	struct ceph_auth_client *ac = osdc->client->monc.auth;
-	int ret = 0;
+	struct ceph_auth_handshake *auth = &o->o_auth;
 
-	if (force_new && o->o_authorizer) {
-		ac->ops->destroy_authorizer(ac, o->o_authorizer);
-		o->o_authorizer = NULL;
-	}
-	if (o->o_authorizer == NULL) {
-		ret = ac->ops->create_authorizer(
-			ac, CEPH_ENTITY_TYPE_OSD,
-			&o->o_authorizer,
-			&o->o_authorizer_buf,
-			&o->o_authorizer_buf_len,
-			&o->o_authorizer_reply_buf,
-			&o->o_authorizer_reply_buf_len);
+	if (force_new && auth->authorizer) {
+		if (ac->ops && ac->ops->destroy_authorizer)
+			ac->ops->destroy_authorizer(ac, auth->authorizer);
+		auth->authorizer = NULL;
+	}
+	if (!auth->authorizer && ac->ops && ac->ops->create_authorizer) {
+		int ret = ac->ops->create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
+							auth);
 		if (ret)
-			return ret;
+			return ERR_PTR(ret);
 	}
-
 	*proto = ac->protocol;
-	*buf = o->o_authorizer_buf;
-	*len = o->o_authorizer_buf_len;
-	*reply_buf = o->o_authorizer_reply_buf;
-	*reply_len = o->o_authorizer_reply_buf_len;
-	return 0;
+
+	return auth;
 }
 
 
@@ -2148,7 +2149,11 @@ static int verify_authorizer_reply(struct ceph_connection *con, int len)
 	struct ceph_osd_client *osdc = o->o_osdc;
 	struct ceph_auth_client *ac = osdc->client->monc.auth;
 
-	return ac->ops->verify_authorizer_reply(ac, o->o_authorizer, len);
+	/*
+	 * XXX If ac->ops or ac->ops->verify_authorizer_reply is null,
+	 * XXX which do we do:  succeed or fail?
+	 */
+	return ac->ops->verify_authorizer_reply(ac, o->o_auth.authorizer, len);
 }
 
 static int invalidate_authorizer(struct ceph_connection *con)
@@ -2157,7 +2162,7 @@ static int invalidate_authorizer(struct ceph_connection *con)
 	struct ceph_osd_client *osdc = o->o_osdc;
 	struct ceph_auth_client *ac = osdc->client->monc.auth;
 
-	if (ac->ops->invalidate_authorizer)
+	if (ac->ops && ac->ops->invalidate_authorizer)
 		ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
 
 	return ceph_monc_validate_auth(&osdc->client->monc);
diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index 56e561a..81e3b84 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -161,13 +161,6 @@ static struct crush_map *crush_decode(void *pbyval, void *end)
 	c->max_rules = ceph_decode_32(p);
 	c->max_devices = ceph_decode_32(p);
 
-	c->device_parents = kcalloc(c->max_devices, sizeof(u32), GFP_NOFS);
-	if (c->device_parents == NULL)
-		goto badmem;
-	c->bucket_parents = kcalloc(c->max_buckets, sizeof(u32), GFP_NOFS);
-	if (c->bucket_parents == NULL)
-		goto badmem;
-
 	c->buckets = kcalloc(c->max_buckets, sizeof(*c->buckets), GFP_NOFS);
 	if (c->buckets == NULL)
 		goto badmem;
@@ -890,8 +883,12 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
 		pglen = ceph_decode_32(p);
 
 		if (pglen) {
-			/* insert */
 			ceph_decode_need(p, end, pglen*sizeof(u32), bad);
+
+			/* removing existing (if any) */
+			(void) __remove_pg_mapping(&map->pg_temp, pgid);
+
+			/* insert */
 			pg = kmalloc(sizeof(*pg) + sizeof(u32)*pglen, GFP_NOFS);
 			if (!pg) {
 				err = -ENOMEM;
@@ -1000,7 +997,6 @@ int ceph_calc_object_layout(struct ceph_object_layout *ol,
 {
 	unsigned int num, num_mask;
 	struct ceph_pg pgid;
-	s32 preferred = (s32)le32_to_cpu(fl->fl_pg_preferred);
 	int poolid = le32_to_cpu(fl->fl_pg_pool);
 	struct ceph_pg_pool_info *pool;
 	unsigned int ps;
@@ -1011,23 +1007,13 @@ int ceph_calc_object_layout(struct ceph_object_layout *ol,
 	if (!pool)
 		return -EIO;
 	ps = ceph_str_hash(pool->v.object_hash, oid, strlen(oid));
-	if (preferred >= 0) {
-		ps += preferred;
-		num = le32_to_cpu(pool->v.lpg_num);
-		num_mask = pool->lpg_num_mask;
-	} else {
-		num = le32_to_cpu(pool->v.pg_num);
-		num_mask = pool->pg_num_mask;
-	}
+	num = le32_to_cpu(pool->v.pg_num);
+	num_mask = pool->pg_num_mask;
 
 	pgid.ps = cpu_to_le16(ps);
-	pgid.preferred = cpu_to_le16(preferred);
+	pgid.preferred = cpu_to_le16(-1);
 	pgid.pool = fl->fl_pg_pool;
-	if (preferred >= 0)
-		dout("calc_object_layout '%s' pgid %d.%xp%d\n", oid, poolid, ps,
-		     (int)preferred);
-	else
-		dout("calc_object_layout '%s' pgid %d.%x\n", oid, poolid, ps);
+	dout("calc_object_layout '%s' pgid %d.%x\n", oid, poolid, ps);
 
 	ol->ol_pgid = pgid;
 	ol->ol_stripe_unit = fl->fl_object_stripe_unit;
@@ -1045,24 +1031,18 @@ static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
 	struct ceph_pg_mapping *pg;
 	struct ceph_pg_pool_info *pool;
 	int ruleno;
-	unsigned int poolid, ps, pps, t;
-	int preferred;
+	unsigned int poolid, ps, pps, t, r;
 
 	poolid = le32_to_cpu(pgid.pool);
 	ps = le16_to_cpu(pgid.ps);
-	preferred = (s16)le16_to_cpu(pgid.preferred);
 
 	pool = __lookup_pg_pool(&osdmap->pg_pools, poolid);
 	if (!pool)
 		return NULL;
 
 	/* pg_temp? */
-	if (preferred >= 0)
-		t = ceph_stable_mod(ps, le32_to_cpu(pool->v.lpg_num),
-				    pool->lpgp_num_mask);
-	else
-		t = ceph_stable_mod(ps, le32_to_cpu(pool->v.pg_num),
-				    pool->pgp_num_mask);
+	t = ceph_stable_mod(ps, le32_to_cpu(pool->v.pg_num),
+			    pool->pgp_num_mask);
 	pgid.ps = cpu_to_le16(t);
 	pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid);
 	if (pg) {
@@ -1080,23 +1060,20 @@ static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
 		return NULL;
 	}
 
-	/* don't forcefeed bad device ids to crush */
-	if (preferred >= osdmap->max_osd ||
-	    preferred >= osdmap->crush->max_devices)
-		preferred = -1;
-
-	if (preferred >= 0)
-		pps = ceph_stable_mod(ps,
-				      le32_to_cpu(pool->v.lpgp_num),
-				      pool->lpgp_num_mask);
-	else
-		pps = ceph_stable_mod(ps,
-				      le32_to_cpu(pool->v.pgp_num),
-				      pool->pgp_num_mask);
+	pps = ceph_stable_mod(ps,
+			      le32_to_cpu(pool->v.pgp_num),
+			      pool->pgp_num_mask);
 	pps += poolid;
-	*num = crush_do_rule(osdmap->crush, ruleno, pps, osds,
-			     min_t(int, pool->v.size, *num),
-			     preferred, osdmap->osd_weight);
+	r = crush_do_rule(osdmap->crush, ruleno, pps, osds,
+			  min_t(int, pool->v.size, *num),
+			  osdmap->osd_weight);
+	if (r < 0) {
+		pr_err("error %d from crush rule: pool %d ruleset %d type %d"
+		       " size %d\n", r, poolid, pool->v.crush_ruleset,
+		       pool->v.type, pool->v.size);
+		return NULL;
+	}
+	*num = r;
 	return osds;
 }