| #include "ceph_debug.h" |
| |
| #include <linux/types.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. |
| */ |
| |
| const static struct ceph_connection_operations mon_con_ops; |
| |
| /* |
| * 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 (ceph_entity_addr_equal(addr, &m->mon_inst[i].addr)) |
| return 1; |
| return 0; |
| } |
| |
| /* |
| * 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; |
| 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); |
| monc->m_auth->front.iov_len = ret; |
| monc->m_auth->hdr.front_len = cpu_to_le32(ret); |
| ceph_msg_get(monc->m_auth); /* keep our ref */ |
| ceph_con_send(monc->con, monc->m_auth); |
| } 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; |
| struct ceph_mon_subscribe_item *i; |
| void *p, *end; |
| |
| msg = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE, 96, 0, 0, NULL); |
| if (!msg) |
| return; |
| |
| p = msg->front.iov_base; |
| end = p + msg->front.iov_len; |
| |
| 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_send(monc->con, 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"); |
| } |
| |
| /* |
| * 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); |
| } |
| |
| #if 0 |
| /* |
| * mount |
| */ |
| static void __request_mount(struct ceph_mon_client *monc) |
| { |
| struct ceph_msg *msg; |
| struct ceph_client_mount *h; |
| |
| dout("__request_mount\n"); |
| msg = ceph_msg_new(CEPH_MSG_CLIENT_MOUNT, sizeof(*h), 0, 0, NULL); |
| if (IS_ERR(msg)) |
| return; |
| h = msg->front.iov_base; |
| h->monhdr.have_version = 0; |
| h->monhdr.session_mon = cpu_to_le16(-1); |
| h->monhdr.session_mon_tid = 0; |
| ceph_con_send(monc->con, msg); |
| } |
| #endif |
| |
| /* |
| * |
| */ |
| 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; |
| } |
| |
| #if 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 handle_mount_ack(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; |
| s32 result; |
| u32 len; |
| s64 cnum; |
| int err = -EINVAL; |
| |
| if (client->whoami >= 0) { |
| dout("handle_mount_ack - already mounted\n"); |
| return; |
| } |
| |
| mutex_lock(&monc->mutex); |
| |
| dout("handle_mount_ack\n"); |
| p = msg->front.iov_base; |
| end = p + msg->front.iov_len; |
| |
| ceph_decode_64_safe(&p, end, cnum, bad); |
| ceph_decode_32_safe(&p, end, result, bad); |
| ceph_decode_32_safe(&p, end, len, bad); |
| if (result) { |
| pr_err("mount denied: %.*s (%d)\n", len, (char *)p, |
| result); |
| err = result; |
| goto out; |
| } |
| p += len; |
| |
| ceph_decode_32_safe(&p, end, len, bad); |
| ceph_decode_need(&p, end, len, bad); |
| monmap = ceph_monmap_decode(p, p + len); |
| if (IS_ERR(monmap)) { |
| pr_err("problem decoding monmap, %d\n", |
| (int)PTR_ERR(monmap)); |
| err = -EINVAL; |
| goto out; |
| } |
| p += len; |
| |
| client->monc.monmap = monmap; |
| kfree(old); |
| |
| client->signed_ticket = NULL; |
| client->signed_ticket_len = 0; |
| |
| monc->want_mount = false; |
| |
| client->whoami = cnum; |
| client->msgr->inst.name.type = CEPH_ENTITY_TYPE_CLIENT; |
| client->msgr->inst.name.num = cpu_to_le64(cnum); |
| pr_info("client%lld fsid " FSID_FORMAT "\n", |
| client->whoami, PR_FSID(&client->monc.monmap->fsid)); |
| |
| ceph_debugfs_client_init(client); |
| __send_subscribe(monc); |
| |
| err = 0; |
| goto out; |
| |
| bad: |
| pr_err("error decoding mount_ack message\n"); |
| out: |
| client->mount_err = err; |
| mutex_unlock(&monc->mutex); |
| wake_up(&client->mount_wq); |
| } |
| #endif |
| |
| /* |
| * 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)); |
| return; |
| } |
| if (monc->have_fsid && |
| ceph_fsid_compare(&monmap->fsid, &monc->monmap->fsid)) { |
| print_hex_dump(KERN_ERR, "monmap->fsid: ", DUMP_PREFIX_NONE, 16, 1, |
| (void *)&monmap->fsid, 16, 0); |
| print_hex_dump(KERN_ERR, "monc->monmap->fsid: ", DUMP_PREFIX_NONE, 16, 1, |
| (void *)&monc->monmap->fsid, 16, 0); |
| |
| pr_err("fsid mismatch, got a previous map with different fsid"); |
| kfree(monmap); |
| return; |
| } |
| |
| client->monc.monmap = monmap; |
| client->monc.have_fsid = true; |
| kfree(old); |
| |
| mutex_unlock(&monc->mutex); |
| wake_up(&client->mount_wq); |
| } |
| |
| |
| /* |
| * init client info after authentication |
| */ |
| static void __init_authenticated_client(struct ceph_mon_client *monc) |
| { |
| struct ceph_client *client = monc->client; |
| |
| client->signed_ticket = NULL; |
| client->signed_ticket_len = 0; |
| client->msgr->inst.name.type = CEPH_ENTITY_TYPE_CLIENT; |
| client->msgr->inst.name.num = monc->auth->global_id; |
| |
| ceph_debugfs_client_init(client); |
| } |
| |
| /* |
| * statfs |
| */ |
| static void handle_statfs_reply(struct ceph_mon_client *monc, |
| struct ceph_msg *msg) |
| { |
| struct ceph_mon_statfs_request *req; |
| struct ceph_mon_statfs_reply *reply = msg->front.iov_base; |
| u64 tid; |
| |
| if (msg->front.iov_len != sizeof(*reply)) |
| goto bad; |
| tid = le64_to_cpu(reply->tid); |
| dout("handle_statfs_reply %p tid %llu\n", msg, tid); |
| |
| mutex_lock(&monc->mutex); |
| req = radix_tree_lookup(&monc->statfs_request_tree, tid); |
| if (req) { |
| *req->buf = reply->st; |
| req->result = 0; |
| } |
| mutex_unlock(&monc->mutex); |
| if (req) |
| complete(&req->completion); |
| return; |
| |
| bad: |
| pr_err("corrupt statfs reply, no tid\n"); |
| } |
| |
| /* |
| * (re)send a statfs request |
| */ |
| static int send_statfs(struct ceph_mon_client *monc, |
| struct ceph_mon_statfs_request *req) |
| { |
| struct ceph_msg *msg; |
| struct ceph_mon_statfs *h; |
| |
| dout("send_statfs tid %llu\n", req->tid); |
| msg = ceph_msg_new(CEPH_MSG_STATFS, sizeof(*h), 0, 0, NULL); |
| if (IS_ERR(msg)) |
| return PTR_ERR(msg); |
| req->request = msg; |
| h = msg->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->tid = cpu_to_le64(req->tid); |
| ceph_con_send(monc->con, msg); |
| return 0; |
| } |
| |
| /* |
| * Do a synchronous statfs(). |
| */ |
| int ceph_monc_do_statfs(struct ceph_mon_client *monc, struct ceph_statfs *buf) |
| { |
| struct ceph_mon_statfs_request req; |
| int err; |
| |
| req.buf = buf; |
| init_completion(&req.completion); |
| |
| /* allocate memory for reply */ |
| err = ceph_msgpool_resv(&monc->msgpool_statfs_reply, 1); |
| if (err) |
| return err; |
| |
| /* register request */ |
| mutex_lock(&monc->mutex); |
| req.tid = ++monc->last_tid; |
| req.last_attempt = jiffies; |
| req.delay = BASE_DELAY_INTERVAL; |
| if (radix_tree_insert(&monc->statfs_request_tree, req.tid, &req) < 0) { |
| mutex_unlock(&monc->mutex); |
| pr_err("ENOMEM in do_statfs\n"); |
| return -ENOMEM; |
| } |
| monc->num_statfs_requests++; |
| mutex_unlock(&monc->mutex); |
| |
| /* send request and wait */ |
| err = send_statfs(monc, &req); |
| if (!err) |
| err = wait_for_completion_interruptible(&req.completion); |
| |
| mutex_lock(&monc->mutex); |
| radix_tree_delete(&monc->statfs_request_tree, req.tid); |
| monc->num_statfs_requests--; |
| ceph_msgpool_resv(&monc->msgpool_statfs_reply, -1); |
| mutex_unlock(&monc->mutex); |
| |
| if (!err) |
| err = req.result; |
| return err; |
| } |
| |
| /* |
| * Resend pending statfs requests. |
| */ |
| static void __resend_statfs(struct ceph_mon_client *monc) |
| { |
| u64 next_tid = 0; |
| int got; |
| int did = 0; |
| struct ceph_mon_statfs_request *req; |
| |
| while (1) { |
| got = radix_tree_gang_lookup(&monc->statfs_request_tree, |
| (void **)&req, |
| next_tid, 1); |
| if (got == 0) |
| break; |
| did++; |
| next_tid = req->tid + 1; |
| |
| send_statfs(monc, req); |
| } |
| } |
| |
| /* |
| * 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); |
| 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.erank = 0; |
| 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; |
| |
| /* msg pools */ |
| err = ceph_msgpool_init(&monc->msgpool_subscribe_ack, |
| sizeof(struct ceph_mon_subscribe_ack), 1, false); |
| if (err < 0) |
| goto out_monmap; |
| err = ceph_msgpool_init(&monc->msgpool_statfs_reply, |
| sizeof(struct ceph_mon_statfs_reply), 0, false); |
| if (err < 0) |
| goto out_pool1; |
| err = ceph_msgpool_init(&monc->msgpool_auth_reply, 4096, 1, false); |
| if (err < 0) |
| goto out_pool2; |
| |
| monc->m_auth = ceph_msg_new(CEPH_MSG_AUTH, 4096, 0, 0, NULL); |
| if (IS_ERR(monc->m_auth)) { |
| err = PTR_ERR(monc->m_auth); |
| monc->m_auth = NULL; |
| goto out_pool3; |
| } |
| |
| monc->cur_mon = -1; |
| monc->hunting = true; |
| monc->sub_renew_after = jiffies; |
| monc->sub_sent = 0; |
| |
| INIT_DELAYED_WORK(&monc->delayed_work, delayed_work); |
| INIT_RADIX_TREE(&monc->statfs_request_tree, GFP_NOFS); |
| monc->num_statfs_requests = 0; |
| monc->last_tid = 0; |
| |
| monc->have_mdsmap = 0; |
| monc->have_osdmap = 0; |
| monc->want_next_osdmap = 1; |
| return 0; |
| |
| out_pool3: |
| ceph_msgpool_destroy(&monc->msgpool_auth_reply); |
| out_pool2: |
| ceph_msgpool_destroy(&monc->msgpool_subscribe_ack); |
| out_pool1: |
| ceph_msgpool_destroy(&monc->msgpool_statfs_reply); |
| 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_msgpool_destroy(&monc->msgpool_subscribe_ack); |
| ceph_msgpool_destroy(&monc->msgpool_statfs_reply); |
| ceph_msgpool_destroy(&monc->msgpool_auth_reply); |
| |
| kfree(monc->monmap); |
| } |
| |
| |
| static void handle_auth_reply(struct ceph_mon_client *monc, |
| struct ceph_msg *msg) |
| { |
| int ret; |
| |
| mutex_lock(&monc->mutex); |
| 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->mount_err = ret; |
| wake_up(&monc->client->mount_wq); |
| } else if (ret > 0) { |
| monc->m_auth->front.iov_len = ret; |
| monc->m_auth->hdr.front_len = cpu_to_le32(ret); |
| ceph_msg_get(monc->m_auth); /* keep our ref */ |
| ceph_con_send(monc->con, monc->m_auth); |
| } else if (monc->auth->ops->is_authenticated(monc->auth)) { |
| dout("authenticated, starting session\n"); |
| __init_authenticated_client(monc); |
| __send_subscribe(monc); |
| __resend_statfs(monc); |
| } |
| mutex_unlock(&monc->mutex); |
| } |
| |
| /* |
| * 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_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) |
| { |
| struct ceph_mon_client *monc = con->private; |
| int type = le16_to_cpu(hdr->type); |
| int front = le32_to_cpu(hdr->front_len); |
| |
| switch (type) { |
| case CEPH_MSG_MON_SUBSCRIBE_ACK: |
| return ceph_msgpool_get(&monc->msgpool_subscribe_ack, front); |
| case CEPH_MSG_STATFS_REPLY: |
| return ceph_msgpool_get(&monc->msgpool_statfs_reply, front); |
| case CEPH_MSG_AUTH_REPLY: |
| return ceph_msgpool_get(&monc->msgpool_auth_reply, front); |
| } |
| return ceph_alloc_msg(con, hdr); |
| } |
| |
| /* |
| * 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); |
| } |
| |
| const static 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, |
| .alloc_middle = ceph_alloc_middle, |
| }; |