summaryrefslogtreecommitdiffstats
path: root/xlators/features/quota/src/quota-enforcer-client.c
blob: 1a4c2e30dd61c02b5fe355baf44119ce937030ba (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
/*
   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.
*/
#include <stdio.h>
#include <string.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/resource.h>
#include <sys/file.h>
#include <netdb.h>
#include <signal.h>
#include <libgen.h>

#include <sys/utsname.h>

#include <stdint.h>
#include <pthread.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>
#include <semaphore.h>
#include <errno.h>

#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif

#ifdef HAVE_MALLOC_STATS
#ifdef DEBUG
#include <mcheck.h>
#endif
#endif

#include "quota.h"
#include "quota-messages.h"

extern struct rpc_clnt_program quota_enforcer_clnt;

int32_t
quota_validate_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
                   int32_t op_ret, int32_t op_errno, inode_t *inode,
                   struct iatt *buf, dict_t *xdata, struct iatt *postparent);

int
quota_enforcer_submit_request(void *req, call_frame_t *frame,
                              rpc_clnt_prog_t *prog, int procnum,
                              struct iobref *iobref, xlator_t *this,
                              fop_cbk_fn_t cbkfn, xdrproc_t xdrproc)
{
    int ret = -1;
    int count = 0;
    struct iovec iov = {
        0,
    };
    struct iobuf *iobuf = NULL;
    char new_iobref = 0;
    ssize_t xdr_size = 0;
    quota_priv_t *priv = NULL;

    GF_ASSERT(this);

    priv = this->private;

    if (req) {
        xdr_size = xdr_sizeof(xdrproc, req);
        iobuf = iobuf_get2(this->ctx->iobuf_pool, xdr_size);
        if (!iobuf) {
            goto out;
        }

        if (!iobref) {
            iobref = iobref_new();
            if (!iobref) {
                goto out;
            }

            new_iobref = 1;
        }

        iobref_add(iobref, iobuf);

        iov.iov_base = iobuf->ptr;
        iov.iov_len = iobuf_size(iobuf);

        /* Create the xdr payload */
        ret = xdr_serialize_generic(iov, req, xdrproc);
        if (ret == -1) {
            goto out;
        }
        iov.iov_len = ret;
        count = 1;
    }

    /* Send the msg */
    ret = rpc_clnt_submit(priv->rpc_clnt, prog, procnum, cbkfn, &iov, count,
                          NULL, 0, iobref, frame, NULL, 0, NULL, 0, NULL);
    ret = 0;

out:
    if (new_iobref)
        iobref_unref(iobref);
    if (iobuf)
        iobuf_unref(iobuf);

    return ret;
}

int
quota_enforcer_lookup_cbk(struct rpc_req *req, struct iovec *iov, int count,
                          void *myframe)
{
    quota_local_t *local = NULL;
    call_frame_t *frame = NULL;
    int ret = 0;
    gfs3_lookup_rsp rsp = {
        0,
    };
    struct iatt stbuf = {
        0,
    };
    struct iatt postparent = {
        0,
    };
    int op_errno = EINVAL;
    dict_t *xdata = NULL;
    inode_t *inode = NULL;
    xlator_t *this = NULL;
    quota_priv_t *priv = NULL;
    struct timespec retry_delay = {
        0,
    };
    gf_timer_t *timer = NULL;

    this = THIS;

    frame = myframe;
    local = frame->local;
    inode = local->validate_loc.inode;
    priv = this->private;

    if (-1 == req->rpc_status) {
        rsp.op_ret = -1;
        op_errno = ENOTCONN;
        goto out;
    }

    ret = xdr_to_generic(*iov, &rsp, (xdrproc_t)xdr_gfs3_lookup_rsp);
    if (ret < 0) {
        gf_msg(this->name, GF_LOG_ERROR, 0, Q_MSG_XDR_DECODING_FAILED,
               "XDR decoding failed");
        rsp.op_ret = -1;
        op_errno = EINVAL;
        goto out;
    }

    op_errno = gf_error_to_errno(rsp.op_errno);
    gf_stat_to_iatt(&rsp.postparent, &postparent);

    if (rsp.op_ret == -1)
        goto out;

    rsp.op_ret = -1;
    gf_stat_to_iatt(&rsp.stat, &stbuf);

    GF_PROTOCOL_DICT_UNSERIALIZE(frame->this, xdata, (rsp.xdata.xdata_val),
                                 (rsp.xdata.xdata_len), rsp.op_ret, op_errno,
                                 out);

    if ((!gf_uuid_is_null(inode->gfid)) &&
        (gf_uuid_compare(stbuf.ia_gfid, inode->gfid) != 0)) {
        gf_msg_debug(frame->this->name, ESTALE, "gfid changed for %s",
                     local->validate_loc.path);
        rsp.op_ret = -1;
        op_errno = ESTALE;
        goto out;
    }

    rsp.op_ret = 0;

out:
    rsp.op_errno = op_errno;

    /* We need to retry connecting to quotad on ENOTCONN error.
     * Suppose if there are two volumes vol1 and vol2,
     * and quota is enabled and limit is set on vol1.
     * Now if IO is happening on vol1 and quota is enabled/disabled
     * on vol2, quotad gets restarted and client will receive
     * ENOTCONN in the IO path of vol1
     */
    if (rsp.op_ret == -1 && rsp.op_errno == ENOTCONN) {
        if (local->quotad_conn_retry >= 12) {
            priv->quotad_conn_status = 1;
            gf_log(this->name, GF_LOG_WARNING,
                   "failed to connect "
                   "to quotad after retry count %d)",
                   local->quotad_conn_retry);
        } else {
            local->quotad_conn_retry++;
        }

        if (priv->quotad_conn_status == 0) {
            /* retry connecting after 5secs for 12 retries
             * (up to 60sec).
             */
            gf_log(this->name, GF_LOG_DEBUG,
                   "retry connecting to "
                   "quotad (retry count %d)",
                   local->quotad_conn_retry);

            retry_delay.tv_sec = 5;
            retry_delay.tv_nsec = 0;
            timer = gf_timer_call_after(this->ctx, retry_delay,
                                        _quota_enforcer_lookup, (void *)frame);
            if (timer == NULL) {
                gf_log(this->name, GF_LOG_WARNING,
                       "failed to "
                       "set quota_enforcer_lookup with timer");
            } else {
                goto clean;
            }
        }
    } else {
        priv->quotad_conn_status = 0;
    }

    if (rsp.op_ret == -1) {
        /* any error other than ENOENT */
        if (rsp.op_errno != ENOENT)
            gf_msg(
                this->name, GF_LOG_WARNING, rsp.op_errno, Q_MSG_LOOKUP_FAILED,
                "Getting cluster-wide size of directory failed "
                "(path: %s gfid:%s)",
                local->validate_loc.path, loc_gfid_utoa(&local->validate_loc));
        else
            gf_msg_trace(this->name, ENOENT, "not found on remote node");

    } else if (local->quotad_conn_retry) {
        gf_log(this->name, GF_LOG_DEBUG,
               "connected to quotad after "
               "retry count %d",
               local->quotad_conn_retry);
    }

    local->validate_cbk(frame, NULL, this, rsp.op_ret, rsp.op_errno, inode,
                        &stbuf, xdata, &postparent);

clean:
    if (xdata)
        dict_unref(xdata);

    free(rsp.xdata.xdata_val);

    return 0;
}

void
_quota_enforcer_lookup(void *data)
{
    quota_local_t *local = NULL;
    gfs3_lookup_req req = {
        {
            0,
        },
    };
    int ret = 0;
    int op_errno = ESTALE;
    quota_priv_t *priv = NULL;
    call_frame_t *frame = NULL;
    loc_t *loc = NULL;
    xlator_t *this = NULL;
    char *dir_path = NULL;

    frame = data;
    local = frame->local;
    this = local->this;
    loc = &local->validate_loc;

    priv = this->private;

    if (!(loc && loc->inode))
        goto unwind;

    if (!gf_uuid_is_null(loc->inode->gfid))
        memcpy(req.gfid, loc->inode->gfid, 16);
    else
        memcpy(req.gfid, loc->gfid, 16);

    if (local->validate_xdata) {
        GF_PROTOCOL_DICT_SERIALIZE(this, local->validate_xdata,
                                   (&req.xdata.xdata_val), req.xdata.xdata_len,
                                   op_errno, unwind);
    }

    if (loc->name)
        req.bname = (char *)loc->name;
    else
        req.bname = "";

    if (loc->path)
        dir_path = (char *)loc->path;
    else
        dir_path = "";

    ret = quota_enforcer_submit_request(
        &req, frame, priv->quota_enforcer, GF_AGGREGATOR_LOOKUP, NULL, this,
        quota_enforcer_lookup_cbk, (xdrproc_t)xdr_gfs3_lookup_req);

    if (ret) {
        gf_msg(this->name, GF_LOG_WARNING, 0, Q_MSG_RPC_SUBMIT_FAILED,
               "Couldn't send the request to "
               "fetch cluster wide size of directory (path:%s gfid:%s)",
               dir_path, req.gfid);
    }

    GF_FREE(req.xdata.xdata_val);

    return;

unwind:
    local->validate_cbk(frame, NULL, this, -1, op_errno, NULL, NULL, NULL,
                        NULL);

    GF_FREE(req.xdata.xdata_val);

    return;
}

int
quota_enforcer_lookup(call_frame_t *frame, xlator_t *this, dict_t *xdata,
                      fop_lookup_cbk_t validate_cbk)
{
    quota_local_t *local = NULL;

    if (!frame || !this)
        goto unwind;

    local = frame->local;
    local->this = this;
    local->validate_cbk = validate_cbk;
    local->validate_xdata = dict_ref(xdata);

    _quota_enforcer_lookup(frame);

    return 0;

unwind:
    validate_cbk(frame, NULL, this, -1, ESTALE, NULL, NULL, NULL, NULL);

    return 0;
}

int
quota_enforcer_notify(struct rpc_clnt *rpc, void *mydata,
                      rpc_clnt_event_t event, void *data)
{
    xlator_t *this = NULL;
    int ret = 0;

    this = mydata;

    switch (event) {
        case RPC_CLNT_CONNECT: {
            gf_msg_trace(this->name, 0, "got RPC_CLNT_CONNECT");
            break;
        }

        case RPC_CLNT_DISCONNECT: {
            gf_msg_trace(this->name, 0, "got RPC_CLNT_DISCONNECT");
            break;
        }

        default:
            gf_msg_trace(this->name, 0, "got some other RPC event %d", event);
            ret = 0;
            break;
    }

    return ret;
}

int
quota_enforcer_blocking_connect(rpc_clnt_t *rpc)
{
    dict_t *options = NULL;
    int ret = -1;

    options = dict_new();
    if (options == NULL)
        goto out;

    ret = dict_set_sizen_str_sizen(options, "non-blocking-io", "no");
    if (ret)
        goto out;

    rpc->conn.trans->reconfigure(rpc->conn.trans, options);

    rpc_clnt_start(rpc);

    ret = dict_set_sizen_str_sizen(options, "non-blocking-io", "yes");
    if (ret)
        goto out;

    rpc->conn.trans->reconfigure(rpc->conn.trans, options);

    ret = 0;
out:
    if (options)
        dict_unref(options);

    return ret;
}

// Returns a started rpc_clnt. Creates a new rpc_clnt if quota_priv doesn't have
// one already
struct rpc_clnt *
quota_enforcer_init(xlator_t *this, dict_t *options)
{
    struct rpc_clnt *rpc = NULL;
    quota_priv_t *priv = NULL;
    int ret = -1;

    priv = this->private;

    LOCK(&priv->lock);
    {
        if (priv->rpc_clnt) {
            ret = 0;
            rpc = priv->rpc_clnt;
        }
    }
    UNLOCK(&priv->lock);

    if (rpc)
        goto out;

    priv->quota_enforcer = &quota_enforcer_clnt;

    ret = dict_set_sizen_str_sizen(options, "transport.address-family", "unix");
    if (ret)
        goto out;

    ret = dict_set_sizen_str_sizen(options, "transport-type", "socket");
    if (ret)
        goto out;

    ret = dict_set_sizen_str_sizen(options, "transport.socket.connect-path",
                                   "/var/run/gluster/quotad.socket");
    if (ret)
        goto out;

    rpc = rpc_clnt_new(options, this, this->name, 16);
    if (!rpc) {
        ret = -1;
        goto out;
    }

    ret = rpc_clnt_register_notify(rpc, quota_enforcer_notify, this);
    if (ret) {
        gf_msg("quota", GF_LOG_ERROR, 0, Q_MSG_RPCCLNT_REGISTER_NOTIFY_FAILED,
               "failed to register notify");
        goto out;
    }

    ret = quota_enforcer_blocking_connect(rpc);
    if (ret)
        goto out;

    ret = 0;
out:
    if (ret) {
        if (rpc)
            rpc_clnt_unref(rpc);
        rpc = NULL;
    }

    return rpc;
}

struct rpc_clnt_procedure quota_enforcer_actors[GF_AGGREGATOR_MAXVALUE] = {
    [GF_AGGREGATOR_NULL] = {"NULL", NULL},
    [GF_AGGREGATOR_LOOKUP] = {"LOOKUP", NULL},
};

struct rpc_clnt_program quota_enforcer_clnt = {
    .progname = "Quota enforcer",
    .prognum = GLUSTER_AGGREGATOR_PROGRAM,
    .progver = GLUSTER_AGGREGATOR_VERSION,
    .numproc = GF_AGGREGATOR_MAXVALUE,
    .proctable = quota_enforcer_actors,
};