summaryrefslogtreecommitdiffstats
path: root/xlators/mgmt/glusterd/src/glusterd-handshake.c
blob: 8411843006b280ee7a6a8e3dc0dcc8af40f955c6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
/*
   Copyright (c) 2010-2012 Red Hat, Inc. <http://www.redhat.com>
   This file is part of GlusterFS.

   This file is licensed to you under your choice of the GNU Lesser
   General Public License, version 3 or any later version (LGPLv3 or
   later), or the GNU General Public License, version 2 (GPLv2), in all
   cases as published by the Free Software Foundation.
*/

#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif

#include "xlator.h"
#include "defaults.h"
#include "glusterfs.h"
#include "compat-errno.h"

#include "glusterd.h"
#include "glusterd-utils.h"
#include "glusterd-op-sm.h"

#include "glusterfs3.h"
#include "protocol-common.h"
#include "rpcsvc.h"
#include "rpc-common-xdr.h"

extern struct rpc_clnt_program gd_peer_prog;
extern struct rpc_clnt_program gd_mgmt_prog;

#define TRUSTED_PREFIX         "trusted-"

typedef ssize_t (*gfs_serialize_t) (struct iovec outmsg, void *data);

static size_t
build_volfile_path (const char *volname, char *path,
                    size_t path_len, char *trusted_str)
{
        struct stat         stbuf       = {0,};
        int32_t             ret         = -1;
        glusterd_conf_t    *priv        = NULL;
        char               *vol         = NULL;
        char               *dup_volname = NULL;
        char               *free_ptr    = NULL;
        char               *tmp         = NULL;
        glusterd_volinfo_t *volinfo     = NULL;
        char               *server      = NULL;

        priv    = THIS->private;

        if (strstr (volname, "gluster/")) {
                server = strchr (volname, '/') + 1;
                glusterd_get_nodesvc_volfile (server, priv->workdir,
                                              path, path_len);
                ret = 1;
                goto out;
        } else if (volname[0] != '/') {
                /* Normal behavior */
                dup_volname = gf_strdup (volname);
        } else {
                /* Bringing in NFS like behavior for mount command,    */
                /* With this, one can mount a volume with below cmd    */
                /* bash# mount -t glusterfs server:/volume /mnt/pnt    */
                dup_volname = gf_strdup (&volname[1]);
        }

        free_ptr = dup_volname;

        ret = glusterd_volinfo_find (dup_volname, &volinfo);
        if (ret) {
                /* Split the volume name */
                vol = strtok_r (dup_volname, ".", &tmp);
                if (!vol)
                        goto out;
                ret = glusterd_volinfo_find (vol, &volinfo);
                if (ret)
                        goto out;
        }

        if (!glusterd_auth_get_username (volinfo))
                trusted_str = NULL;

        ret = snprintf (path, path_len, "%s/vols/%s/%s.vol",
                        priv->workdir, volinfo->volname, volname);
        if (ret == -1)
                goto out;

        ret = stat (path, &stbuf);

        if ((ret == -1) && (errno == ENOENT)) {
                snprintf (path, path_len, "%s/vols/%s/%s%s-fuse.vol",
                          priv->workdir, volinfo->volname,
                          (trusted_str ? trusted_str : ""), dup_volname);
                ret = stat (path, &stbuf);
        }

        if ((ret == -1) && (errno == ENOENT)) {
                snprintf (path, path_len, "%s/vols/%s/%s-tcp.vol",
                          priv->workdir, volinfo->volname, volname);
        }

        ret = 1;
out:
        GF_FREE (free_ptr);
        return ret;
}

int
server_getspec (rpcsvc_request_t *req)
{
        int32_t               ret                    = -1;
        int32_t               op_errno               = 0;
        int32_t               spec_fd                = -1;
        size_t                file_len               = 0;
        char                  filename[PATH_MAX]  = {0,};
        struct stat           stbuf                  = {0,};
        char                 *volume                 = NULL;
        char                 *tmp                    = NULL;
        int                   cookie                 = 0;
        rpc_transport_t      *trans                  = NULL;
        gf_getspec_req        args                   = {0,};
        gf_getspec_rsp        rsp                    = {0,};
        char                  addrstr[RPCSVC_PEER_STRLEN] = {0};


        if (!xdr_to_generic (req->msg[0], &args,
                             (xdrproc_t)xdr_gf_getspec_req)) {
                //failed to decode msg;
                req->rpc_err = GARBAGE_ARGS;
                goto fail;
        }

        volume = args.key;

        trans = req->trans;
        ret = rpcsvc_transport_peername (trans, (char *)&addrstr,
                                         sizeof (addrstr));
        if (ret)
                goto fail;

        tmp = strrchr (addrstr, ':');
        *tmp = '\0';

        /* we trust the local admin */
        if (!glusterd_is_local_addr (addrstr)) {

                ret = build_volfile_path (volume, filename,
                                          sizeof (filename),
                                          TRUSTED_PREFIX);
        } else {
                ret = build_volfile_path (volume, filename,
                                          sizeof (filename), NULL);
        }

        if (ret > 0) {
                /* to allocate the proper buffer to hold the file data */
                ret = stat (filename, &stbuf);
                if (ret < 0){
                        gf_log ("glusterd", GF_LOG_ERROR,
                                "Unable to stat %s (%s)",
                                filename, strerror (errno));
                        goto fail;
                }

                spec_fd = open (filename, O_RDONLY);
                if (spec_fd < 0) {
                        gf_log ("glusterd", GF_LOG_ERROR,
                                "Unable to open %s (%s)",
                                filename, strerror (errno));
                        goto fail;
                }
                ret = file_len = stbuf.st_size;
        } else {
                op_errno = ENOENT;
        }

        if (file_len) {
                rsp.spec = CALLOC (file_len+1, sizeof (char));
                if (!rsp.spec) {
                        ret = -1;
                        op_errno = ENOMEM;
                        goto fail;
                }
                ret = read (spec_fd, rsp.spec, file_len);

                close (spec_fd);
        }

        /* convert to XDR */
fail:
        rsp.op_ret   = ret;

        if (op_errno)
                rsp.op_errno = gf_errno_to_error (op_errno);
        if (cookie)
                rsp.op_errno = cookie;

        if (!rsp.spec)
                rsp.spec = strdup ("");

        glusterd_submit_reply (req, &rsp, NULL, 0, NULL,
                               (xdrproc_t)xdr_gf_getspec_rsp);
        free (args.key);//malloced by xdr
        free (rsp.spec);

        return 0;
}

int32_t
server_event_notify (rpcsvc_request_t *req)
{
        int32_t                 ret             = -1;
        int32_t                 op_errno        =  0;
        gf_event_notify_req     args            = {0,};
        gf_event_notify_rsp     rsp             = {0,};
        dict_t                 *dict            = NULL;
        gf_boolean_t            need_rsp        = _gf_true;

        if (!xdr_to_generic (req->msg[0], &args,
            (xdrproc_t)xdr_gf_event_notify_req)) {
                req->rpc_err = GARBAGE_ARGS;
                goto fail;
        }

        if (args.dict.dict_len) {
                dict = dict_new ();
                if (!dict)
                        return ret;
                ret = dict_unserialize (args.dict.dict_val,
                                        args.dict.dict_len, &dict);
                if (ret) {
                        gf_log ("", GF_LOG_ERROR, "Failed to unserialize req");
                        goto fail;
                }
        }

        switch (args.op) {
        case GF_EN_DEFRAG_STATUS:
                gf_log ("", GF_LOG_INFO,
                        "recieved defrag status updated");
                if (dict) {
                        glusterd_defrag_event_notify_handle (dict);
                        need_rsp = _gf_false;
                }
                break;
        default:
                gf_log ("", GF_LOG_ERROR, "Unkown op recieved in in event "
                        "notify");
                ret = -1;
                break;
        }

fail:
        rsp.op_ret   = ret;

        if (op_errno)
                rsp.op_errno = gf_errno_to_error (op_errno);

        if (need_rsp)
                glusterd_submit_reply (req, &rsp, NULL, 0, NULL,
                                       (xdrproc_t)xdr_gf_event_notify_rsp);
        if (dict)
                dict_unref (dict);
        free (args.dict.dict_val);//malloced by xdr

        return 0;
}
rpcsvc_actor_t gluster_handshake_actors[] = {
        [GF_HNDSK_NULL]      = {"NULL",      GF_HNDSK_NULL,      NULL, NULL, 0},
        [GF_HNDSK_GETSPEC]   = {"GETSPEC",   GF_HNDSK_GETSPEC,   server_getspec, NULL, 0},
        [GF_HNDSK_EVENT_NOTIFY] = {"EVENTNOTIFY", GF_HNDSK_EVENT_NOTIFY, server_event_notify,
                                    NULL, 0},
};


struct rpcsvc_program gluster_handshake_prog = {
        .progname  = "GlusterFS Handshake",
        .prognum   = GLUSTER_HNDSK_PROGRAM,
        .progver   = GLUSTER_HNDSK_VERSION,
        .actors    = gluster_handshake_actors,
        .numactors = GF_HNDSK_MAXVALUE,
};

char *glusterd_dump_proc[GF_DUMP_MAXVALUE] = {
        [GF_DUMP_NULL] = "NULL",
        [GF_DUMP_DUMP] = "DUMP",
};

rpc_clnt_prog_t glusterd_dump_prog = {
        .progname  = "GLUSTERD-DUMP",
        .prognum   = GLUSTER_DUMP_PROGRAM,
        .progver   = GLUSTER_DUMP_VERSION,
        .procnames = glusterd_dump_proc,
};

static int
glusterd_event_connected_inject (glusterd_peerctx_t *peerctx)
{
        GF_ASSERT (peerctx);

        glusterd_friend_sm_event_t      *event = NULL;
        glusterd_probe_ctx_t            *ctx = NULL;
        int                             ret = -1;
        glusterd_peerinfo_t             *peerinfo = NULL;


        ret = glusterd_friend_sm_new_event
                        (GD_FRIEND_EVENT_CONNECTED, &event);

        if (ret) {
                gf_log ("", GF_LOG_ERROR, "Unable to get new event");
                goto out;
        }

        ctx = GF_CALLOC (1, sizeof(*ctx), gf_gld_mt_probe_ctx_t);

        if (!ctx) {
                ret = -1;
                gf_log ("", GF_LOG_ERROR, "Memory not available");
                goto out;
        }

        peerinfo = peerctx->peerinfo;
        ctx->hostname = gf_strdup (peerinfo->hostname);
        ctx->port = peerinfo->port;
        ctx->req = peerctx->args.req;

        event->peerinfo = peerinfo;
        event->ctx = ctx;

        ret = glusterd_friend_sm_inject_event (event);

        if (ret) {
                gf_log ("glusterd", GF_LOG_ERROR, "Unable to inject "
                        "EVENT_CONNECTED ret = %d", ret);
                goto out;
        }

out:
        gf_log ("", GF_LOG_DEBUG, "returning %d", ret);
        return ret;
}

int
glusterd_set_clnt_mgmt_program (glusterd_peerinfo_t *peerinfo,
                                gf_prog_detail *prog)
{
        gf_prog_detail *trav     = NULL;
        int             ret      = -1;

        if (!peerinfo || !prog)
                goto out;

        trav = prog;

        while (trav) {
                /* Select 'programs' */
                if ((gd_mgmt_prog.prognum == trav->prognum) &&
                    (gd_mgmt_prog.progver == trav->progver)) {
                        peerinfo->mgmt = &gd_mgmt_prog;
                        ret = 0;
                }
                if ((gd_peer_prog.prognum == trav->prognum) &&
                    (gd_peer_prog.progver == trav->progver)) {
                        peerinfo->peer = &gd_peer_prog;
                        ret = 0;
                }
                if (ret) {
                        gf_log ("", GF_LOG_DEBUG,
                                "%s (%"PRId64":%"PRId64") not supported",
                                trav->progname, trav->prognum,
                                trav->progver);
                }
                trav = trav->next;
        }

        if (peerinfo->mgmt) {
                gf_log ("", GF_LOG_INFO,
                        "Using Program %s, Num (%d), Version (%d)",
                        peerinfo->mgmt->progname, peerinfo->mgmt->prognum,
                        peerinfo->mgmt->progver);
        }
        if (peerinfo->peer) {
                gf_log ("", GF_LOG_INFO,
                        "Using Program %s, Num (%d), Version (%d)",
                        peerinfo->peer->progname, peerinfo->peer->prognum,
                        peerinfo->peer->progver);
        }

out:
        return ret;
}

int
glusterd_peer_dump_version_cbk (struct rpc_req *req, struct iovec *iov,
                                int count, void *myframe)
{
        int                  ret      = -1;
        gf_dump_rsp          rsp      = {0,};
        xlator_t            *this     = NULL;
        gf_prog_detail      *trav     = NULL;
        gf_prog_detail      *next     = NULL;
        call_frame_t        *frame    = NULL;
        glusterd_peerinfo_t *peerinfo = NULL;
        glusterd_peerctx_t  *peerctx  = NULL;
        char                msg[1024] = {0,};

        this = THIS;
        frame = myframe;
        peerctx = frame->local;
        peerinfo = peerctx->peerinfo;

        if (-1 == req->rpc_status) {
                snprintf (msg, sizeof (msg),
                          "Error through RPC layer, retry again later");
                gf_log ("", GF_LOG_ERROR, "%s", msg);
                peerctx->errstr = gf_strdup (msg);
                goto out;
        }

        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gf_dump_rsp);
        if (ret < 0) {
                snprintf (msg, sizeof (msg), "Failed to decode XDR");
                gf_log ("", GF_LOG_ERROR, "%s", msg);
                peerctx->errstr = gf_strdup (msg);
                goto out;
        }
        if (-1 == rsp.op_ret) {
                snprintf (msg, sizeof (msg),
                          "Failed to get the 'versions' from remote server");
                gf_log (frame->this->name, GF_LOG_ERROR, "%s", msg);
                peerctx->errstr = gf_strdup (msg);
                goto out;
        }

        /* Make sure we assign the proper program to peer */
        ret = glusterd_set_clnt_mgmt_program (peerinfo, rsp.prog);
        if (ret) {
                gf_log ("", GF_LOG_WARNING, "failed to set the mgmt program");
                goto out;
        }

        ret = default_notify (this, GF_EVENT_CHILD_UP, NULL);

        if (GD_MODE_ON == peerctx->args.mode) {
                ret = glusterd_event_connected_inject (peerctx);
                peerctx->args.req = NULL;
        } else if (GD_MODE_SWITCH_ON == peerctx->args.mode) {
                peerctx->args.mode = GD_MODE_ON;
        } else {
                gf_log ("", GF_LOG_WARNING, "unknown mode %d",
                        peerctx->args.mode);
        }

        glusterd_friend_sm ();
        glusterd_op_sm ();

        ret = 0;
out:

        /* don't use GF_FREE, buffer was allocated by libc */
        if (rsp.prog) {
                trav = rsp.prog;
                while (trav) {
                        next = trav->next;
                        free (trav->progname);
                        free (trav);
                        trav = next;
                }
        }

        frame->local = NULL;
        STACK_DESTROY (frame->root);

        if (ret != 0)
                rpc_transport_disconnect (peerinfo->rpc->conn.trans);

        return 0;
}


int
glusterd_peer_handshake (xlator_t *this, struct rpc_clnt *rpc,
                         glusterd_peerctx_t *peerctx)
{
        call_frame_t        *frame    = NULL;
        gf_dump_req          req      = {0,};
        int                  ret      = -1;

        frame = create_frame (this, this->ctx->pool);
        if (!frame)
                goto out;

        frame->local = peerctx;

        req.gfs_id = 0xcafe;

        ret = glusterd_submit_request (peerctx->peerinfo->rpc, &req, frame,
                                       &glusterd_dump_prog, GF_DUMP_DUMP,
                                       NULL, this,
                                       glusterd_peer_dump_version_cbk,
                                       (xdrproc_t)xdr_gf_dump_req);
out:
        return ret;
}