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// Copyright 2018 Mimecast Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "init.h"
#include "../datas/stack.h"
#include "itask.h"
#include "ithread.h"
#include "../meta/meta.h"
#include "../mounts.h"
#include "../utils/futils.h"
init_s *init_new(options_s *opts)
{
init_s *i = Malloc(init_s);
i->opts = opts;
i->mounts = mounts_new(opts);
i->threads_map = amap_new(i->mounts->count);
i->reuse_queue = rbuffer_new(4096);
i->replay_fd = Fopen(opts->replay_file, "r");
pthread_mutex_init(&i->reuse_queue_mutex, NULL);
return i;
}
void init_destroy(init_s *i)
{
amap_destroy(i->threads_map);
mounts_destroy(i->mounts);
itask_s *task = NULL;
while (NULL != (task = rbuffer_get_next(i->reuse_queue))) {
itask_destroy(task);
}
rbuffer_destroy(i->reuse_queue);
fclose(i->replay_fd);
pthread_mutex_destroy(&i->reuse_queue_mutex);
free(i);
}
void init_extract_header(init_s *i, off_t *init_offset)
{
options_s *opts = i->opts;
meta_s *m = meta_new(i->replay_fd);
meta_read_start(m);
long version = 0;
if (meta_read_l(m, "version", &version)) {
Put("Replay version is '%ld'", version);
if (version != REPLAY_VERSION) {
Error(".replay file of incompatible version, got %x, expected %x",
(int)version, REPLAY_VERSION);
}
}
char *user;
if (meta_read_s(m, "user", &user)) {
Put("Setting user to '%s'", user);
opts->user = user;
}
char *name;
if (meta_read_s(m, "name", &name)) {
Put("Setting name to '%s'", name);
opts->name = name;
}
if (meta_read_l(m, "init_offset", init_offset)) {
if (*init_offset < 0) {
Error("Offset overflow (init offset too large in .replay)");
}
Put("Setting init offset to '%ld'", *init_offset);
}
meta_destroy(m);
}
status_e init_run(options_s *opts)
{
status_e ret = SUCCESS;
init_s *i = init_new(opts);
off_t init_offset;
init_extract_header(i, &init_offset);
// Ensure that all ./replay/NAME directories exist
mounts_init(i->mounts);
// Don't do messy stuff as super user
set_limits_drop_root(opts->user);
// We need to clean up garbish from previous runs!
if (opts->purge)
mounts_purge(i->mounts);
else
mounts_trash(i->mounts);
Out("Creating all files and directories requried for test '%s'...",
opts->name);
// Seek to the INIT section
fseeko(i->replay_fd, init_offset, SEEK_SET);
bool is_file = false, is_dir = false;
long vsize = 0;
char *path;
// Stats
long dirs_created = 0;
long files_created = 0;
long files_total_size = 0;
// Helper variables for getline
char *line = NULL;
size_t len = 0, read = 0;
char *saveptr;
stack_s *all_threads = stack_new();
// Process the INIT section of the .replay file line by line.
while ((read = getline(&line, &len, i->replay_fd)) != -1) {
char *tok = strtok_r(line, "|", &saveptr);
for (int ntok = 0; tok; ntok++) {
switch (ntok) {
case 0:
is_dir = atoi(tok) == 1;
break;
case 1:
is_file = atoi(tok) == 1;
break;
case 2:
vsize = atol(tok);
if (vsize < 0) {
Error("Size overflow");
}
break;
case 3:
path = tok;
break;
default:
break;
}
tok = strtok_r(NULL, "|", &saveptr);
}
itask_s *task = rbuffer_get_next(i->reuse_queue);
if (!task) {
task = itask_new();
} else {
itask_extract_stats(task, &dirs_created, &files_created,
&files_total_size);
}
// Set new task values
if (is_dir) {
task->is_dir = true;
} else if (is_file) {
task->is_file = true;
task->vsize = vsize;
}
task->path = Clone(path);
// We run one init thread per mount point
int mnr = mounts_get_mountnumber(i->mounts, path);
ithread_s *t = amap_get(i->threads_map, mnr);
if (!t) {
t = ithread_new(i);
amap_set(i->threads_map, mnr, t);
stack_push(all_threads, t);
ithread_start(t);
}
//itask_print(task);
while (!rbuffer_insert(t->queue, task))
usleep(1000);
}
ithread_s *t = NULL;
while (NULL != (t = stack_pop(all_threads))) {
ithread_terminate(t);
ithread_destroy(t);
}
stack_destroy(all_threads);
itask_s *task = NULL;
while (NULL != (task = rbuffer_get_next(i->reuse_queue))) {
itask_extract_stats(task, &dirs_created, &files_created,
&files_total_size);
itask_destroy(task);
}
Put("Done!");
Put("Created %ld files (net total size: %.2fg) and %ld directories!",
files_created, files_total_size/(1024*1024*1024.0),
dirs_created);
init_destroy(i);
Put("You are ready to fire up the test now");
return ret;
}
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