summaryrefslogtreecommitdiffstats
path: root/xlators/cluster/ec/src/ec-data.c
blob: 33a970d922ab8b430aad7a199c6050f0029ebc66 (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
/*
  Copyright (c) 2012-2014 DataLab, s.l. <http://www.datalab.es>
  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 "ec-mem-types.h"
#include "ec-helpers.h"
#include "ec-common.h"
#include "ec-data.h"
#include "ec-messages.h"

ec_cbk_data_t * ec_cbk_data_allocate(call_frame_t * frame, xlator_t * this,
                                     ec_fop_data_t * fop, int32_t id,
                                     int32_t idx, int32_t op_ret,
                                     int32_t op_errno)
{
    ec_cbk_data_t * cbk;
    ec_t * ec = this->private;

    if (fop->xl != this)
    {
        gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                EC_MSG_XLATOR_MISMATCH, "Mismatching xlators between request "
                "and answer (req=%s, ans=%s).", fop->xl->name, this->name);

        return NULL;
    }
    if (fop->frame != frame)
    {
        gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                EC_MSG_FRAME_MISMATCH, "Mismatching frames between request "
                                         "and answer (req=%p, ans=%p).",
                                         fop->frame, frame);

        return NULL;
    }
    if (fop->id != id)
    {
        gf_msg (this->name, GF_LOG_ERROR, EINVAL,
                EC_MSG_FOP_MISMATCH, "Mismatching fops between request "
                                         "and answer (req=%d, ans=%d).",
                                         fop->id, id);

        return NULL;
    }

    cbk = mem_get0(ec->cbk_pool);
    if (cbk == NULL)
    {
        gf_msg (this->name, GF_LOG_ERROR, ENOMEM,
                EC_MSG_NO_MEMORY, "Failed to allocate memory for an "
                                         "answer.");
        return NULL;
    }

    cbk->fop = fop;
    cbk->idx = idx;
    cbk->mask = 1ULL << idx;
    cbk->count = 1;
    cbk->op_ret = op_ret;
    cbk->op_errno = op_errno;
    INIT_LIST_HEAD (&cbk->entries.list);

    LOCK(&fop->lock);

    list_add_tail(&cbk->answer_list, &fop->answer_list);

    UNLOCK(&fop->lock);

    return cbk;
}

void ec_cbk_data_destroy(ec_cbk_data_t * cbk)
{
    if (cbk->xdata != NULL)
    {
        dict_unref(cbk->xdata);
    }
    if (cbk->dict != NULL)
    {
        dict_unref(cbk->dict);
    }
    if (cbk->inode != NULL)
    {
        inode_unref(cbk->inode);
    }
    if (cbk->fd != NULL)
    {
        fd_unref(cbk->fd);
    }
    if (cbk->buffers != NULL)
    {
        iobref_unref(cbk->buffers);
    }
    GF_FREE(cbk->vector);
    gf_dirent_free (&cbk->entries);
    GF_FREE (cbk->str);

    mem_put(cbk);
}

ec_fop_data_t * ec_fop_data_allocate(call_frame_t * frame, xlator_t * this,
                                     int32_t id, uint32_t flags,
                                     uintptr_t target, int32_t minimum,
                                     ec_wind_f wind, ec_handler_f handler,
                                     ec_cbk_t cbks, void * data)
{
    ec_fop_data_t * fop, * parent;
    ec_t * ec = this->private;

    fop = mem_get0(ec->fop_pool);
    if (fop == NULL)
    {
        gf_msg (this->name, GF_LOG_ERROR, ENOMEM,
                EC_MSG_NO_MEMORY, "Failed to allocate memory for a "
                                         "request.");

        return NULL;
    }

    INIT_LIST_HEAD(&fop->cbk_list);
    INIT_LIST_HEAD(&fop->healer);
    INIT_LIST_HEAD(&fop->answer_list);
    INIT_LIST_HEAD(&fop->pending_list);
    INIT_LIST_HEAD(&fop->locks[0].owner_list);
    INIT_LIST_HEAD(&fop->locks[0].wait_list);
    INIT_LIST_HEAD(&fop->locks[1].owner_list);
    INIT_LIST_HEAD(&fop->locks[1].wait_list);

    fop->xl = this;
    fop->req_frame = frame;

    /* fops need a private frame to be able to execute some postop operations
     * even if the original fop has completed and reported back to the upper
     * xlator and it has destroyed the base frame.
     *
     * TODO: minimize usage of private frames. Reuse req_frame as much as
     *       possible.
     */
    if (frame != NULL)
    {
        fop->frame = copy_frame(frame);
    }
    else
    {
        fop->frame = create_frame(this, this->ctx->pool);
    }
    if (fop->frame == NULL)
    {
        gf_msg (this->name, GF_LOG_ERROR, ENOMEM,
                EC_MSG_NO_MEMORY, "Failed to create a private frame "
                                         "for a request");

        mem_put(fop);

        return NULL;
    }
    fop->id = id;
    fop->refs = 1;

    fop->flags = flags;
    fop->minimum = minimum;
    fop->mask = target;

    fop->wind = wind;
    fop->handler = handler;
    fop->cbks = cbks;
    fop->data = data;

    fop->uid = fop->frame->root->uid;
    fop->gid = fop->frame->root->gid;

    LOCK_INIT(&fop->lock);

    fop->frame->local = fop;

    if (frame != NULL)
    {
        parent = frame->local;
        if (parent != NULL)
        {
            ec_sleep(parent);
        }

        fop->parent = parent;
    }

    LOCK(&ec->lock);

    list_add_tail(&fop->pending_list, &ec->pending_fops);

    UNLOCK(&ec->lock);

    return fop;
}

void ec_fop_data_acquire(ec_fop_data_t * fop)
{
    LOCK(&fop->lock);

    ec_trace("ACQUIRE", fop, "");

    fop->refs++;

    UNLOCK(&fop->lock);
}

static void
ec_handle_last_pending_fop_completion (ec_fop_data_t *fop, gf_boolean_t *notify)
{
        ec_t *ec = fop->xl->private;

        if (!list_empty (&fop->pending_list)) {
                LOCK(&ec->lock);
                {
                        list_del_init (&fop->pending_list);
                        *notify = list_empty (&ec->pending_fops);
                }
                UNLOCK(&ec->lock);
        }
}

void
ec_fop_cleanup(ec_fop_data_t *fop)
{
        ec_cbk_data_t *cbk, *tmp;

        list_for_each_entry_safe(cbk, tmp, &fop->answer_list, answer_list) {
            list_del_init(&cbk->answer_list);

            ec_cbk_data_destroy(cbk);
        }
        INIT_LIST_HEAD(&fop->cbk_list);

        fop->answer = NULL;
}

void ec_fop_data_release(ec_fop_data_t * fop)
{
    ec_t *ec = NULL;
    int32_t refs;
    gf_boolean_t notify = _gf_false;

    LOCK(&fop->lock);

    ec_trace("RELEASE", fop, "");

    GF_ASSERT (fop->refs > 0);
    refs = --fop->refs;

    UNLOCK(&fop->lock);

    if (refs == 0)
    {
        fop->frame->local = NULL;
        STACK_DESTROY(fop->frame->root);

        LOCK_DESTROY(&fop->lock);

        if (fop->xdata != NULL)
        {
            dict_unref(fop->xdata);
        }
        if (fop->dict != NULL)
        {
            dict_unref(fop->dict);
        }
        if (fop->inode != NULL)
        {
            inode_unref(fop->inode);
        }
        if (fop->fd != NULL)
        {
            fd_unref(fop->fd);
        }
        if (fop->buffers != NULL)
        {
            iobref_unref(fop->buffers);
        }
        GF_FREE(fop->vector);
        GF_FREE(fop->str[0]);
        GF_FREE(fop->str[1]);
        loc_wipe(&fop->loc[0]);
        loc_wipe(&fop->loc[1]);
        GF_FREE(fop->errstr);

        ec_resume_parent(fop, fop->error);

        ec_fop_cleanup(fop);

        ec = fop->xl->private;
        ec_handle_last_pending_fop_completion (fop, &notify);
        ec_handle_healers_done (fop);
        mem_put(fop);
        if (notify) {
            ec_pending_fops_completed(ec);
        }
    }
}