1 files changed, 0 insertions, 1018 deletions

diff --git a/fs/ceph/mon_client.c b/fs/ceph/mon_client.c
deleted file mode 100644
index b2a5a3e4a671..000000000000
--- a/fs/ceph/mon_client.c
+++ /dev/null
@@ -1,1018 +0,0 @@
-#include "ceph_debug.h"
-
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/random.h>
-#include <linux/sched.h>
-
-#include "mon_client.h"
-#include "super.h"
-#include "auth.h"
-#include "decode.h"
-
-/*
- * Interact with Ceph monitor cluster.  Handle requests for new map
- * versions, and periodically resend as needed.  Also implement
- * statfs() and umount().
- *
- * A small cluster of Ceph "monitors" are responsible for managing critical
- * cluster configuration and state information.  An odd number (e.g., 3, 5)
- * of cmon daemons use a modified version of the Paxos part-time parliament
- * algorithm to manage the MDS map (mds cluster membership), OSD map, and
- * list of clients who have mounted the file system.
- *
- * We maintain an open, active session with a monitor at all times in order to
- * receive timely MDSMap updates.  We periodically send a keepalive byte on the
- * TCP socket to ensure we detect a failure.  If the connection does break, we
- * randomly hunt for a new monitor.  Once the connection is reestablished, we
- * resend any outstanding requests.
- */
-
-static const struct ceph_connection_operations mon_con_ops;
-
-static int __validate_auth(struct ceph_mon_client *monc);
-
-/*
- * Decode a monmap blob (e.g., during mount).
- */
-struct ceph_monmap *ceph_monmap_decode(void *p, void *end)
-{
-	struct ceph_monmap *m = NULL;
-	int i, err = -EINVAL;
-	struct ceph_fsid fsid;
-	u32 epoch, num_mon;
-	u16 version;
-	u32 len;
-
-	ceph_decode_32_safe(&p, end, len, bad);
-	ceph_decode_need(&p, end, len, bad);
-
-	dout("monmap_decode %p %p len %d\n", p, end, (int)(end-p));
-
-	ceph_decode_16_safe(&p, end, version, bad);
-
-	ceph_decode_need(&p, end, sizeof(fsid) + 2*sizeof(u32), bad);
-	ceph_decode_copy(&p, &fsid, sizeof(fsid));
-	epoch = ceph_decode_32(&p);
-
-	num_mon = ceph_decode_32(&p);
-	ceph_decode_need(&p, end, num_mon*sizeof(m->mon_inst[0]), bad);
-
-	if (num_mon >= CEPH_MAX_MON)
-		goto bad;
-	m = kmalloc(sizeof(*m) + sizeof(m->mon_inst[0])*num_mon, GFP_NOFS);
-	if (m == NULL)
-		return ERR_PTR(-ENOMEM);
-	m->fsid = fsid;
-	m->epoch = epoch;
-	m->num_mon = num_mon;
-	ceph_decode_copy(&p, m->mon_inst, num_mon*sizeof(m->mon_inst[0]));
-	for (i = 0; i < num_mon; i++)
-		ceph_decode_addr(&m->mon_inst[i].addr);
-
-	dout("monmap_decode epoch %d, num_mon %d\n", m->epoch,
-	     m->num_mon);
-	for (i = 0; i < m->num_mon; i++)
-		dout("monmap_decode  mon%d is %s\n", i,
-		     pr_addr(&m->mon_inst[i].addr.in_addr));
-	return m;
-
-bad:
-	dout("monmap_decode failed with %d\n", err);
-	kfree(m);
-	return ERR_PTR(err);
-}
-
-/*
- * return true if *addr is included in the monmap.
- */
-int ceph_monmap_contains(struct ceph_monmap *m, struct ceph_entity_addr *addr)
-{
-	int i;
-
-	for (i = 0; i < m->num_mon; i++)
-		if (memcmp(addr, &m->mon_inst[i].addr, sizeof(*addr)) == 0)
-			return 1;
-	return 0;
-}
-
-/*
- * Send an auth request.
- */
-static void __send_prepared_auth_request(struct ceph_mon_client *monc, int len)
-{
-	monc->pending_auth = 1;
-	monc->m_auth->front.iov_len = len;
-	monc->m_auth->hdr.front_len = cpu_to_le32(len);
-	ceph_con_revoke(monc->con, monc->m_auth);
-	ceph_msg_get(monc->m_auth);  /* keep our ref */
-	ceph_con_send(monc->con, monc->m_auth);
-}
-
-/*
- * Close monitor session, if any.
- */
-static void __close_session(struct ceph_mon_client *monc)
-{
-	if (monc->con) {
-		dout("__close_session closing mon%d\n", monc->cur_mon);
-		ceph_con_revoke(monc->con, monc->m_auth);
-		ceph_con_close(monc->con);
-		monc->cur_mon = -1;
-		monc->pending_auth = 0;
-		ceph_auth_reset(monc->auth);
-	}
-}
-
-/*
- * Open a session with a (new) monitor.
- */
-static int __open_session(struct ceph_mon_client *monc)
-{
-	char r;
-	int ret;
-
-	if (monc->cur_mon < 0) {
-		get_random_bytes(&r, 1);
-		monc->cur_mon = r % monc->monmap->num_mon;
-		dout("open_session num=%d r=%d -> mon%d\n",
-		     monc->monmap->num_mon, r, monc->cur_mon);
-		monc->sub_sent = 0;
-		monc->sub_renew_after = jiffies;  /* i.e., expired */
-		monc->want_next_osdmap = !!monc->want_next_osdmap;
-
-		dout("open_session mon%d opening\n", monc->cur_mon);
-		monc->con->peer_name.type = CEPH_ENTITY_TYPE_MON;
-		monc->con->peer_name.num = cpu_to_le64(monc->cur_mon);
-		ceph_con_open(monc->con,
-			      &monc->monmap->mon_inst[monc->cur_mon].addr);
-
-		/* initiatiate authentication handshake */
-		ret = ceph_auth_build_hello(monc->auth,
-					    monc->m_auth->front.iov_base,
-					    monc->m_auth->front_max);
-		__send_prepared_auth_request(monc, ret);
-	} else {
-		dout("open_session mon%d already open\n", monc->cur_mon);
-	}
-	return 0;
-}
-
-static bool __sub_expired(struct ceph_mon_client *monc)
-{
-	return time_after_eq(jiffies, monc->sub_renew_after);
-}
-
-/*
- * Reschedule delayed work timer.
- */
-static void __schedule_delayed(struct ceph_mon_client *monc)
-{
-	unsigned delay;
-
-	if (monc->cur_mon < 0 || __sub_expired(monc))
-		delay = 10 * HZ;
-	else
-		delay = 20 * HZ;
-	dout("__schedule_delayed after %u\n", delay);
-	schedule_delayed_work(&monc->delayed_work, delay);
-}
-
-/*
- * Send subscribe request for mdsmap and/or osdmap.
- */
-static void __send_subscribe(struct ceph_mon_client *monc)
-{
-	dout("__send_subscribe sub_sent=%u exp=%u want_osd=%d\n",
-	     (unsigned)monc->sub_sent, __sub_expired(monc),
-	     monc->want_next_osdmap);
-	if ((__sub_expired(monc) && !monc->sub_sent) ||
-	    monc->want_next_osdmap == 1) {
-		struct ceph_msg *msg = monc->m_subscribe;
-		struct ceph_mon_subscribe_item *i;
-		void *p, *end;
-
-		p = msg->front.iov_base;
-		end = p + msg->front_max;
-
-		dout("__send_subscribe to 'mdsmap' %u+\n",
-		     (unsigned)monc->have_mdsmap);
-		if (monc->want_next_osdmap) {
-			dout("__send_subscribe to 'osdmap' %u\n",
-			     (unsigned)monc->have_osdmap);
-			ceph_encode_32(&p, 3);
-			ceph_encode_string(&p, end, "osdmap", 6);
-			i = p;
-			i->have = cpu_to_le64(monc->have_osdmap);
-			i->onetime = 1;
-			p += sizeof(*i);
-			monc->want_next_osdmap = 2;  /* requested */
-		} else {
-			ceph_encode_32(&p, 2);
-		}
-		ceph_encode_string(&p, end, "mdsmap", 6);
-		i = p;
-		i->have = cpu_to_le64(monc->have_mdsmap);
-		i->onetime = 0;
-		p += sizeof(*i);
-		ceph_encode_string(&p, end, "monmap", 6);
-		i = p;
-		i->have = 0;
-		i->onetime = 0;
-		p += sizeof(*i);
-
-		msg->front.iov_len = p - msg->front.iov_base;
-		msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
-		ceph_con_revoke(monc->con, msg);
-		ceph_con_send(monc->con, ceph_msg_get(msg));
-
-		monc->sub_sent = jiffies | 1;  /* never 0 */
-	}
-}
-
-static void handle_subscribe_ack(struct ceph_mon_client *monc,
-				 struct ceph_msg *msg)
-{
-	unsigned seconds;
-	struct ceph_mon_subscribe_ack *h = msg->front.iov_base;
-
-	if (msg->front.iov_len < sizeof(*h))
-		goto bad;
-	seconds = le32_to_cpu(h->duration);
-
-	mutex_lock(&monc->mutex);
-	if (monc->hunting) {
-		pr_info("mon%d %s session established\n",
-			monc->cur_mon, pr_addr(&monc->con->peer_addr.in_addr));
-		monc->hunting = false;
-	}
-	dout("handle_subscribe_ack after %d seconds\n", seconds);
-	monc->sub_renew_after = monc->sub_sent + (seconds >> 1)*HZ - 1;
-	monc->sub_sent = 0;
-	mutex_unlock(&monc->mutex);
-	return;
-bad:
-	pr_err("got corrupt subscribe-ack msg\n");
-	ceph_msg_dump(msg);
-}
-
-/*
- * Keep track of which maps we have
- */
-int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 got)
-{
-	mutex_lock(&monc->mutex);
-	monc->have_mdsmap = got;
-	mutex_unlock(&monc->mutex);
-	return 0;
-}
-
-int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 got)
-{
-	mutex_lock(&monc->mutex);
-	monc->have_osdmap = got;
-	monc->want_next_osdmap = 0;
-	mutex_unlock(&monc->mutex);
-	return 0;
-}
-
-/*
- * Register interest in the next osdmap
- */
-void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc)
-{
-	dout("request_next_osdmap have %u\n", monc->have_osdmap);
-	mutex_lock(&monc->mutex);
-	if (!monc->want_next_osdmap)
-		monc->want_next_osdmap = 1;
-	if (monc->want_next_osdmap < 2)
-		__send_subscribe(monc);
-	mutex_unlock(&monc->mutex);
-}
-
-/*
- *
- */
-int ceph_monc_open_session(struct ceph_mon_client *monc)
-{
-	if (!monc->con) {
-		monc->con = kmalloc(sizeof(*monc->con), GFP_KERNEL);
-		if (!monc->con)
-			return -ENOMEM;
-		ceph_con_init(monc->client->msgr, monc->con);
-		monc->con->private = monc;
-		monc->con->ops = &mon_con_ops;
-	}
-
-	mutex_lock(&monc->mutex);
-	__open_session(monc);
-	__schedule_delayed(monc);
-	mutex_unlock(&monc->mutex);
-	return 0;
-}
-
-/*
- * The monitor responds with mount ack indicate mount success.  The
- * included client ticket allows the client to talk to MDSs and OSDs.
- */
-static void ceph_monc_handle_map(struct ceph_mon_client *monc,
-				 struct ceph_msg *msg)
-{
-	struct ceph_client *client = monc->client;
-	struct ceph_monmap *monmap = NULL, *old = monc->monmap;
-	void *p, *end;
-
-	mutex_lock(&monc->mutex);
-
-	dout("handle_monmap\n");
-	p = msg->front.iov_base;
-	end = p + msg->front.iov_len;
-
-	monmap = ceph_monmap_decode(p, end);
-	if (IS_ERR(monmap)) {
-		pr_err("problem decoding monmap, %d\n",
-		       (int)PTR_ERR(monmap));
-		goto out;
-	}
-
-	if (ceph_check_fsid(monc->client, &monmap->fsid) < 0) {
-		kfree(monmap);
-		goto out;
-	}
-
-	client->monc.monmap = monmap;
-	kfree(old);
-
-out:
-	mutex_unlock(&monc->mutex);
-	wake_up_all(&client->auth_wq);
-}
-
-/*
- * generic requests (e.g., statfs, poolop)
- */
-static struct ceph_mon_generic_request *__lookup_generic_req(
-	struct ceph_mon_client *monc, u64 tid)
-{
-	struct ceph_mon_generic_request *req;
-	struct rb_node *n = monc->generic_request_tree.rb_node;
-
-	while (n) {
-		req = rb_entry(n, struct ceph_mon_generic_request, node);
-		if (tid < req->tid)
-			n = n->rb_left;
-		else if (tid > req->tid)
-			n = n->rb_right;
-		else
-			return req;
-	}
-	return NULL;
-}
-
-static void __insert_generic_request(struct ceph_mon_client *monc,
-			    struct ceph_mon_generic_request *new)
-{
-	struct rb_node **p = &monc->generic_request_tree.rb_node;
-	struct rb_node *parent = NULL;
-	struct ceph_mon_generic_request *req = NULL;
-
-	while (*p) {
-		parent = *p;
-		req = rb_entry(parent, struct ceph_mon_generic_request, node);
-		if (new->tid < req->tid)
-			p = &(*p)->rb_left;
-		else if (new->tid > req->tid)
-			p = &(*p)->rb_right;
-		else
-			BUG();
-	}
-
-	rb_link_node(&new->node, parent, p);
-	rb_insert_color(&new->node, &monc->generic_request_tree);
-}
-
-static void release_generic_request(struct kref *kref)
-{
-	struct ceph_mon_generic_request *req =
-		container_of(kref, struct ceph_mon_generic_request, kref);
-
-	if (req->reply)
-		ceph_msg_put(req->reply);
-	if (req->request)
-		ceph_msg_put(req->request);
-
-	kfree(req);
-}
-
-static void put_generic_request(struct ceph_mon_generic_request *req)
-{
-	kref_put(&req->kref, release_generic_request);
-}
-
-static void get_generic_request(struct ceph_mon_generic_request *req)
-{
-	kref_get(&req->kref);
-}
-
-static struct ceph_msg *get_generic_reply(struct ceph_connection *con,
-					 struct ceph_msg_header *hdr,
-					 int *skip)
-{
-	struct ceph_mon_client *monc = con->private;
-	struct ceph_mon_generic_request *req;
-	u64 tid = le64_to_cpu(hdr->tid);
-	struct ceph_msg *m;
-
-	mutex_lock(&monc->mutex);
-	req = __lookup_generic_req(monc, tid);
-	if (!req) {
-		dout("get_generic_reply %lld dne\n", tid);
-		*skip = 1;
-		m = NULL;
-	} else {
-		dout("get_generic_reply %lld got %p\n", tid, req->reply);
-		m = ceph_msg_get(req->reply);
-		/*
-		 * we don't need to track the connection reading into
-		 * this reply because we only have one open connection
-		 * at a time, ever.
-		 */
-	}
-	mutex_unlock(&monc->mutex);
-	return m;
-}
-
-static int do_generic_request(struct ceph_mon_client *monc,
-			      struct ceph_mon_generic_request *req)
-{
-	int err;
-
-	/* register request */
-	mutex_lock(&monc->mutex);
-	req->tid = ++monc->last_tid;
-	req->request->hdr.tid = cpu_to_le64(req->tid);
-	__insert_generic_request(monc, req);
-	monc->num_generic_requests++;
-	ceph_con_send(monc->con, ceph_msg_get(req->request));
-	mutex_unlock(&monc->mutex);
-
-	err = wait_for_completion_interruptible(&req->completion);
-
-	mutex_lock(&monc->mutex);
-	rb_erase(&req->node, &monc->generic_request_tree);
-	monc->num_generic_requests--;
-	mutex_unlock(&monc->mutex);
-
-	if (!err)
-		err = req->result;
-	return err;
-}
-
-/*
- * statfs
- */
-static void handle_statfs_reply(struct ceph_mon_client *monc,
-				struct ceph_msg *msg)
-{
-	struct ceph_mon_generic_request *req;
-	struct ceph_mon_statfs_reply *reply = msg->front.iov_base;
-	u64 tid = le64_to_cpu(msg->hdr.tid);
-
-	if (msg->front.iov_len != sizeof(*reply))
-		goto bad;
-	dout("handle_statfs_reply %p tid %llu\n", msg, tid);
-
-	mutex_lock(&monc->mutex);
-	req = __lookup_generic_req(monc, tid);
-	if (req) {
-		*(struct ceph_statfs *)req->buf = reply->st;
-		req->result = 0;
-		get_generic_request(req);
-	}
-	mutex_unlock(&monc->mutex);
-	if (req) {
-		complete_all(&req->completion);
-		put_generic_request(req);
-	}
-	return;
-
-bad:
-	pr_err("corrupt generic reply, tid %llu\n", tid);
-	ceph_msg_dump(msg);
-}
-
-/*
- * Do a synchronous statfs().
- */
-int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf)
-{
-	struct ceph_mon_generic_request *req;
-	struct ceph_mon_statfs *h;
-	int err;
-
-	req = kzalloc(sizeof(*req), GFP_NOFS);
-	if (!req)
-		return -ENOMEM;
-
-	kref_init(&req->kref);
-	req->buf = buf;
-	req->buf_len = sizeof(*buf);
-	init_completion(&req->completion);
-
-	err = -ENOMEM;
-	req->request = ceph_msg_new(CEPH_MSG_STATFS, sizeof(*h), GFP_NOFS);
-	if (!req->request)
-		goto out;
-	req->reply = ceph_msg_new(CEPH_MSG_STATFS_REPLY, 1024, GFP_NOFS);
-	if (!req->reply)
-		goto out;
-
-	/* fill out request */
-	h = req->request->front.iov_base;
-	h->monhdr.have_version = 0;
-	h->monhdr.session_mon = cpu_to_le16(-1);
-	h->monhdr.session_mon_tid = 0;
-	h->fsid = monc->monmap->fsid;
-
-	err = do_generic_request(monc, req);
-
-out:
-	kref_put(&req->kref, release_generic_request);
-	return err;
-}
-
-/*
- * pool ops
- */
-static int get_poolop_reply_buf(const char *src, size_t src_len,
-				char *dst, size_t dst_len)
-{
-	u32 buf_len;
-
-	if (src_len != sizeof(u32) + dst_len)
-		return -EINVAL;
-
-	buf_len = le32_to_cpu(*(u32 *)src);
-	if (buf_len != dst_len)
-		return -EINVAL;
-
-	memcpy(dst, src + sizeof(u32), dst_len);
-	return 0;
-}
-
-static void handle_poolop_reply(struct ceph_mon_client *monc,
-				struct ceph_msg *msg)
-{
-	struct ceph_mon_generic_request *req;
-	struct ceph_mon_poolop_reply *reply = msg->front.iov_base;
-	u64 tid = le64_to_cpu(msg->hdr.tid);
-
-	if (msg->front.iov_len < sizeof(*reply))
-		goto bad;
-	dout("handle_poolop_reply %p tid %llu\n", msg, tid);
-
-	mutex_lock(&monc->mutex);
-	req = __lookup_generic_req(monc, tid);
-	if (req) {
-		if (req->buf_len &&
-		    get_poolop_reply_buf(msg->front.iov_base + sizeof(*reply),
-				     msg->front.iov_len - sizeof(*reply),
-				     req->buf, req->buf_len) < 0) {
-			mutex_unlock(&monc->mutex);
-			goto bad;
-		}
-		req->result = le32_to_cpu(reply->reply_code);
-		get_generic_request(req);
-	}
-	mutex_unlock(&monc->mutex);
-	if (req) {
-		complete(&req->completion);
-		put_generic_request(req);
-	}
-	return;
-
-bad:
-	pr_err("corrupt generic reply, tid %llu\n", tid);
-	ceph_msg_dump(msg);
-}
-
-/*
- * Do a synchronous pool op.
- */
-int ceph_monc_do_poolop(struct ceph_mon_client *monc, u32 op,
-			u32 pool, u64 snapid,
-			char *buf, int len)
-{
-	struct ceph_mon_generic_request *req;
-	struct ceph_mon_poolop *h;
-	int err;
-
-	req = kzalloc(sizeof(*req), GFP_NOFS);
-	if (!req)
-		return -ENOMEM;
-
-	kref_init(&req->kref);
-	req->buf = buf;
-	req->buf_len = len;
-	init_completion(&req->completion);
-
-	err = -ENOMEM;
-	req->request = ceph_msg_new(CEPH_MSG_POOLOP, sizeof(*h), GFP_NOFS);
-	if (!req->request)
-		goto out;
-	req->reply = ceph_msg_new(CEPH_MSG_POOLOP_REPLY, 1024, GFP_NOFS);
-	if (!req->reply)
-		goto out;
-
-	/* fill out request */
-	req->request->hdr.version = cpu_to_le16(2);
-	h = req->request->front.iov_base;
-	h->monhdr.have_version = 0;
-	h->monhdr.session_mon = cpu_to_le16(-1);
-	h->monhdr.session_mon_tid = 0;
-	h->fsid = monc->monmap->fsid;
-	h->pool = cpu_to_le32(pool);
-	h->op = cpu_to_le32(op);
-	h->auid = 0;
-	h->snapid = cpu_to_le64(snapid);
-	h->name_len = 0;
-
-	err = do_generic_request(monc, req);
-
-out:
-	kref_put(&req->kref, release_generic_request);
-	return err;
-}
-
-int ceph_monc_create_snapid(struct ceph_mon_client *monc,
-			    u32 pool, u64 *snapid)
-{
-	return ceph_monc_do_poolop(monc,  POOL_OP_CREATE_UNMANAGED_SNAP,
-				   pool, 0, (char *)snapid, sizeof(*snapid));
-
-}
-
-int ceph_monc_delete_snapid(struct ceph_mon_client *monc,
-			    u32 pool, u64 snapid)
-{
-	return ceph_monc_do_poolop(monc,  POOL_OP_CREATE_UNMANAGED_SNAP,
-				   pool, snapid, 0, 0);
-
-}
-
-/*
- * Resend pending generic requests.
- */
-static void __resend_generic_request(struct ceph_mon_client *monc)
-{
-	struct ceph_mon_generic_request *req;
-	struct rb_node *p;
-
-	for (p = rb_first(&monc->generic_request_tree); p; p = rb_next(p)) {
-		req = rb_entry(p, struct ceph_mon_generic_request, node);
-		ceph_con_revoke(monc->con, req->request);
-		ceph_con_send(monc->con, ceph_msg_get(req->request));
-	}
-}
-
-/*
- * Delayed work.  If we haven't mounted yet, retry.  Otherwise,
- * renew/retry subscription as needed (in case it is timing out, or we
- * got an ENOMEM).  And keep the monitor connection alive.
- */
-static void delayed_work(struct work_struct *work)
-{
-	struct ceph_mon_client *monc =
-		container_of(work, struct ceph_mon_client, delayed_work.work);
-
-	dout("monc delayed_work\n");
-	mutex_lock(&monc->mutex);
-	if (monc->hunting) {
-		__close_session(monc);
-		__open_session(monc);  /* continue hunting */
-	} else {
-		ceph_con_keepalive(monc->con);
-
-		__validate_auth(monc);
-
-		if (monc->auth->ops->is_authenticated(monc->auth))
-			__send_subscribe(monc);
-	}
-	__schedule_delayed(monc);
-	mutex_unlock(&monc->mutex);
-}
-
-/*
- * On startup, we build a temporary monmap populated with the IPs
- * provided by mount(2).
- */
-static int build_initial_monmap(struct ceph_mon_client *monc)
-{
-	struct ceph_mount_args *args = monc->client->mount_args;
-	struct ceph_entity_addr *mon_addr = args->mon_addr;
-	int num_mon = args->num_mon;
-	int i;
-
-	/* build initial monmap */
-	monc->monmap = kzalloc(sizeof(*monc->monmap) +
-			       num_mon*sizeof(monc->monmap->mon_inst[0]),
-			       GFP_KERNEL);
-	if (!monc->monmap)
-		return -ENOMEM;
-	for (i = 0; i < num_mon; i++) {
-		monc->monmap->mon_inst[i].addr = mon_addr[i];
-		monc->monmap->mon_inst[i].addr.nonce = 0;
-		monc->monmap->mon_inst[i].name.type =
-			CEPH_ENTITY_TYPE_MON;
-		monc->monmap->mon_inst[i].name.num = cpu_to_le64(i);
-	}
-	monc->monmap->num_mon = num_mon;
-	monc->have_fsid = false;
-
-	/* release addr memory */
-	kfree(args->mon_addr);
-	args->mon_addr = NULL;
-	args->num_mon = 0;
-	return 0;
-}
-
-int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl)
-{
-	int err = 0;
-
-	dout("init\n");
-	memset(monc, 0, sizeof(*monc));
-	monc->client = cl;
-	monc->monmap = NULL;
-	mutex_init(&monc->mutex);
-
-	err = build_initial_monmap(monc);
-	if (err)
-		goto out;
-
-	monc->con = NULL;
-
-	/* authentication */
-	monc->auth = ceph_auth_init(cl->mount_args->name,
-				    cl->mount_args->secret);
-	if (IS_ERR(monc->auth))
-		return PTR_ERR(monc->auth);
-	monc->auth->want_keys =
-		CEPH_ENTITY_TYPE_AUTH | CEPH_ENTITY_TYPE_MON |
-		CEPH_ENTITY_TYPE_OSD | CEPH_ENTITY_TYPE_MDS;
-
-	/* msgs */
-	err = -ENOMEM;
-	monc->m_subscribe_ack = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE_ACK,
-				     sizeof(struct ceph_mon_subscribe_ack),
-				     GFP_NOFS);
-	if (!monc->m_subscribe_ack)
-		goto out_monmap;
-
-	monc->m_subscribe = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE, 96, GFP_NOFS);
-	if (!monc->m_subscribe)
-		goto out_subscribe_ack;
-
-	monc->m_auth_reply = ceph_msg_new(CEPH_MSG_AUTH_REPLY, 4096, GFP_NOFS);
-	if (!monc->m_auth_reply)
-		goto out_subscribe;
-
-	monc->m_auth = ceph_msg_new(CEPH_MSG_AUTH, 4096, GFP_NOFS);
-	monc->pending_auth = 0;
-	if (!monc->m_auth)
-		goto out_auth_reply;
-
-	monc->cur_mon = -1;
-	monc->hunting = true;
-	monc->sub_renew_after = jiffies;
-	monc->sub_sent = 0;
-
-	INIT_DELAYED_WORK(&monc->delayed_work, delayed_work);
-	monc->generic_request_tree = RB_ROOT;
-	monc->num_generic_requests = 0;
-	monc->last_tid = 0;
-
-	monc->have_mdsmap = 0;
-	monc->have_osdmap = 0;
-	monc->want_next_osdmap = 1;
-	return 0;
-
-out_auth_reply:
-	ceph_msg_put(monc->m_auth_reply);
-out_subscribe:
-	ceph_msg_put(monc->m_subscribe);
-out_subscribe_ack:
-	ceph_msg_put(monc->m_subscribe_ack);
-out_monmap:
-	kfree(monc->monmap);
-out:
-	return err;
-}
-
-void ceph_monc_stop(struct ceph_mon_client *monc)
-{
-	dout("stop\n");
-	cancel_delayed_work_sync(&monc->delayed_work);
-
-	mutex_lock(&monc->mutex);
-	__close_session(monc);
-	if (monc->con) {
-		monc->con->private = NULL;
-		monc->con->ops->put(monc->con);
-		monc->con = NULL;
-	}
-	mutex_unlock(&monc->mutex);
-
-	ceph_auth_destroy(monc->auth);
-
-	ceph_msg_put(monc->m_auth);
-	ceph_msg_put(monc->m_auth_reply);
-	ceph_msg_put(monc->m_subscribe);
-	ceph_msg_put(monc->m_subscribe_ack);
-
-	kfree(monc->monmap);
-}
-
-static void handle_auth_reply(struct ceph_mon_client *monc,
-			      struct ceph_msg *msg)
-{
-	int ret;
-	int was_auth = 0;
-
-	mutex_lock(&monc->mutex);
-	if (monc->auth->ops)
-		was_auth = monc->auth->ops->is_authenticated(monc->auth);
-	monc->pending_auth = 0;
-	ret = ceph_handle_auth_reply(monc->auth, msg->front.iov_base,
-				     msg->front.iov_len,
-				     monc->m_auth->front.iov_base,
-				     monc->m_auth->front_max);
-	if (ret < 0) {
-		monc->client->auth_err = ret;
-		wake_up_all(&monc->client->auth_wq);
-	} else if (ret > 0) {
-		__send_prepared_auth_request(monc, ret);
-	} else if (!was_auth && monc->auth->ops->is_authenticated(monc->auth)) {
-		dout("authenticated, starting session\n");
-
-		monc->client->msgr->inst.name.type = CEPH_ENTITY_TYPE_CLIENT;
-		monc->client->msgr->inst.name.num =
-					cpu_to_le64(monc->auth->global_id);
-
-		__send_subscribe(monc);
-		__resend_generic_request(monc);
-	}
-	mutex_unlock(&monc->mutex);
-}
-
-static int __validate_auth(struct ceph_mon_client *monc)
-{
-	int ret;
-
-	if (monc->pending_auth)
-		return 0;
-
-	ret = ceph_build_auth(monc->auth, monc->m_auth->front.iov_base,
-			      monc->m_auth->front_max);
-	if (ret <= 0)
-		return ret; /* either an error, or no need to authenticate */
-	__send_prepared_auth_request(monc, ret);
-	return 0;
-}
-
-int ceph_monc_validate_auth(struct ceph_mon_client *monc)
-{
-	int ret;
-
-	mutex_lock(&monc->mutex);
-	ret = __validate_auth(monc);
-	mutex_unlock(&monc->mutex);
-	return ret;
-}
-
-/*
- * handle incoming message
- */
-static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
-{
-	struct ceph_mon_client *monc = con->private;
-	int type = le16_to_cpu(msg->hdr.type);
-
-	if (!monc)
-		return;
-
-	switch (type) {
-	case CEPH_MSG_AUTH_REPLY:
-		handle_auth_reply(monc, msg);
-		break;
-
-	case CEPH_MSG_MON_SUBSCRIBE_ACK:
-		handle_subscribe_ack(monc, msg);
-		break;
-
-	case CEPH_MSG_STATFS_REPLY:
-		handle_statfs_reply(monc, msg);
-		break;
-
-	case CEPH_MSG_POOLOP_REPLY:
-		handle_poolop_reply(monc, msg);
-		break;
-
-	case CEPH_MSG_MON_MAP:
-		ceph_monc_handle_map(monc, msg);
-		break;
-
-	case CEPH_MSG_MDS_MAP:
-		ceph_mdsc_handle_map(&monc->client->mdsc, msg);
-		break;
-
-	case CEPH_MSG_OSD_MAP:
-		ceph_osdc_handle_map(&monc->client->osdc, msg);
-		break;
-
-	default:
-		pr_err("received unknown message type %d %s\n", type,
-		       ceph_msg_type_name(type));
-	}
-	ceph_msg_put(msg);
-}
-
-/*
- * Allocate memory for incoming message
- */
-static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con,
-				      struct ceph_msg_header *hdr,
-				      int *skip)
-{
-	struct ceph_mon_client *monc = con->private;
-	int type = le16_to_cpu(hdr->type);
-	int front_len = le32_to_cpu(hdr->front_len);
-	struct ceph_msg *m = NULL;
-
-	*skip = 0;
-
-	switch (type) {
-	case CEPH_MSG_MON_SUBSCRIBE_ACK:
-		m = ceph_msg_get(monc->m_subscribe_ack);
-		break;
-	case CEPH_MSG_POOLOP_REPLY:
-	case CEPH_MSG_STATFS_REPLY:
-		return get_generic_reply(con, hdr, skip);
-	case CEPH_MSG_AUTH_REPLY:
-		m = ceph_msg_get(monc->m_auth_reply);
-		break;
-	case CEPH_MSG_MON_MAP:
-	case CEPH_MSG_MDS_MAP:
-	case CEPH_MSG_OSD_MAP:
-		m = ceph_msg_new(type, front_len, GFP_NOFS);
-		break;
-	}
-
-	if (!m) {
-		pr_info("alloc_msg unknown type %d\n", type);
-		*skip = 1;
-	}
-	return m;
-}
-
-/*
- * If the monitor connection resets, pick a new monitor and resubmit
- * any pending requests.
- */
-static void mon_fault(struct ceph_connection *con)
-{
-	struct ceph_mon_client *monc = con->private;
-
-	if (!monc)
-		return;
-
-	dout("mon_fault\n");
-	mutex_lock(&monc->mutex);
-	if (!con->private)
-		goto out;
-
-	if (monc->con && !monc->hunting)
-		pr_info("mon%d %s session lost, "
-			"hunting for new mon\n", monc->cur_mon,
-			pr_addr(&monc->con->peer_addr.in_addr));
-
-	__close_session(monc);
-	if (!monc->hunting) {
-		/* start hunting */
-		monc->hunting = true;
-		__open_session(monc);
-	} else {
-		/* already hunting, let's wait a bit */
-		__schedule_delayed(monc);
-	}
-out:
-	mutex_unlock(&monc->mutex);
-}
-
-static const struct ceph_connection_operations mon_con_ops = {
-	.get = ceph_con_get,
-	.put = ceph_con_put,
-	.dispatch = dispatch,
-	.fault = mon_fault,
-	.alloc_msg = mon_alloc_msg,
-};