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31989e66c6
Add a test case which exercises the virFDStreamOpenFile and virFDStreamCreateFile methods. Ensure that both the synchronous and non-blocking iohelper code paths work. This validates the regression recently fixed which broke reading in non-blocking mode Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
347 lines
9.3 KiB
C
347 lines
9.3 KiB
C
/*
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* Copyright (C) 2013 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Author: Daniel P. Berrange <berrange@redhat.com>
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include "testutils.h"
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#include "fdstream.h"
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#include "datatypes.h"
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#include "virerror.h"
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#include "viralloc.h"
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#include "virlog.h"
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#include "virstring.h"
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#include "virfile.h"
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#include "virutil.h"
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#define VIR_FROM_THIS VIR_FROM_NONE
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#define PATTERN_LEN 256
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static int testFDStreamReadCommon(const char *scratchdir, bool blocking)
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{
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int fd = -1;
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char *tmpfile = NULL;
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int ret = -1;
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char *pattern = NULL;
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char *buf = NULL;
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virStreamPtr st = NULL;
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size_t i;
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virConnectPtr conn = NULL;
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int flags = 0;
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if (!blocking)
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flags |= VIR_STREAM_NONBLOCK;
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if (!(conn = virConnectOpen("test:///default")))
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goto cleanup;
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if (VIR_ALLOC_N(pattern, PATTERN_LEN) < 0 ||
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VIR_ALLOC_N(buf, PATTERN_LEN) < 0)
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goto cleanup;
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for (i = 0 ; i < PATTERN_LEN ; i++)
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pattern[i] = i;
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if (virAsprintf(&tmpfile, "%s/input.data", scratchdir) < 0)
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goto cleanup;
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if ((fd = open(tmpfile, O_CREAT|O_WRONLY|O_EXCL, 0600)) < 0)
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goto cleanup;
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for (i = 0 ; i < 10 ; i++) {
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if (safewrite(fd, pattern, PATTERN_LEN) != PATTERN_LEN)
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goto cleanup;
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}
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if (VIR_CLOSE(fd) < 0)
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goto cleanup;
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if (!(st = virStreamNew(conn, flags)))
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goto cleanup;
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/* Start reading 1/2 way through first pattern
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* and end 1/2 way through last pattern
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*/
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if (virFDStreamOpenFile(st, tmpfile,
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PATTERN_LEN / 2, PATTERN_LEN * 9,
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O_RDONLY) < 0)
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goto cleanup;
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for (i = 0 ; i < 10 ; i++) {
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size_t offset = 0;
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size_t want;
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if (i == 0)
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want = PATTERN_LEN / 2;
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else
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want = PATTERN_LEN;
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while (want > 0) {
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int got;
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reread:
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got = st->driver->streamRecv(st, buf + offset, want);
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if (got < 0) {
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if (got == -2 && !blocking) {
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usleep(20 * 1000);
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goto reread;
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}
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fprintf(stderr, "Failed to read stream: %s\n",
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virGetLastErrorMessage());
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goto cleanup;
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}
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if (got == 0) {
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/* Expect EOF 1/2 through last pattern */
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if (i == 9 && want == (PATTERN_LEN / 2))
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break;
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fprintf(stderr, "Unexpected EOF block %zu want %zu\n",
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i, want);
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goto cleanup;
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}
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offset += got;
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want -= got;
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}
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if (i == 0) {
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if (memcmp(buf, pattern + (PATTERN_LEN / 2), PATTERN_LEN / 2) != 0) {
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fprintf(stderr, "Mismatched pattern data iteration %zu\n", i);
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goto cleanup;
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}
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} else if (i == 9) {
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if (memcmp(buf, pattern, PATTERN_LEN / 2) != 0) {
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fprintf(stderr, "Mismatched pattern data iteration %zu\n", i);
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goto cleanup;
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}
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} else {
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if (memcmp(buf, pattern, PATTERN_LEN) != 0) {
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fprintf(stderr, "Mismatched pattern data iteration %zu\n", i);
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goto cleanup;
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}
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}
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}
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if (st->driver->streamFinish(st) != 0) {
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fprintf(stderr, "Failed to finish stream: %s\n",
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virGetLastErrorMessage());
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goto cleanup;
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}
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ret = 0;
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cleanup:
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if (st)
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virStreamFree(st);
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VIR_FORCE_CLOSE(fd);
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if (tmpfile != NULL)
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unlink(tmpfile);
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if (conn)
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virConnectClose(conn);
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VIR_FREE(tmpfile);
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VIR_FREE(pattern);
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VIR_FREE(buf);
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return ret;
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}
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static int testFDStreamReadBlock(const void *data)
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{
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return testFDStreamReadCommon(data, true);
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}
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static int testFDStreamReadNonblock(const void *data)
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{
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return testFDStreamReadCommon(data, false);
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}
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static int testFDStreamWriteCommon(const char *scratchdir, bool blocking)
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{
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int fd = -1;
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char *tmpfile = NULL;
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int ret = -1;
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char *pattern = NULL;
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char *buf = NULL;
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virStreamPtr st = NULL;
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size_t i;
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virConnectPtr conn = NULL;
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int flags = 0;
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if (!blocking)
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flags |= VIR_STREAM_NONBLOCK;
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if (!(conn = virConnectOpen("test:///default")))
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goto cleanup;
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if (VIR_ALLOC_N(pattern, PATTERN_LEN) < 0 ||
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VIR_ALLOC_N(buf, PATTERN_LEN) < 0)
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goto cleanup;
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for (i = 0 ; i < PATTERN_LEN ; i++)
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pattern[i] = i;
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if (virAsprintf(&tmpfile, "%s/input.data", scratchdir) < 0)
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goto cleanup;
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if (!(st = virStreamNew(conn, flags)))
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goto cleanup;
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/* Start writing 1/2 way through first pattern
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* and end 1/2 way through last pattern
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*/
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if (virFDStreamCreateFile(st, tmpfile,
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PATTERN_LEN / 2, PATTERN_LEN * 9,
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O_WRONLY, 0600) < 0)
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goto cleanup;
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for (i = 0 ; i < 10 ; i++) {
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size_t offset = 0;
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size_t want;
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if (i == 0)
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want = PATTERN_LEN / 2;
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else
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want = PATTERN_LEN;
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while (want > 0) {
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int got;
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rewrite:
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got = st->driver->streamSend(st, pattern + offset, want);
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if (got < 0) {
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if (got == -2 && !blocking) {
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usleep(20 * 1000);
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goto rewrite;
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}
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if (i == 9 &&
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want == (PATTERN_LEN / 2))
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break;
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fprintf(stderr, "Failed to write stream: %s\n",
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virGetLastErrorMessage());
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goto cleanup;
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}
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offset += got;
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want -= got;
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}
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}
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if (st->driver->streamFinish(st) != 0) {
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fprintf(stderr, "Failed to finish stream: %s\n",
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virGetLastErrorMessage());
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goto cleanup;
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}
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if ((fd = open(tmpfile, O_RDONLY)) < 0)
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goto cleanup;
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for (i = 0 ; i < 10 ; i++) {
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size_t want;
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if (i == 9)
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want = PATTERN_LEN / 2;
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else
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want = PATTERN_LEN;
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if (saferead(fd, buf, want) != want) {
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fprintf(stderr, "Short read from data\n");
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goto cleanup;
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}
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if (i == 0) {
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size_t j;
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for (j = 0 ; j < (PATTERN_LEN / 2) ; j++) {
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if (buf[j] != 0) {
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fprintf(stderr, "Mismatched pattern data iteration %zu\n", i);
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goto cleanup;
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}
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}
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if (memcmp(buf + (PATTERN_LEN / 2), pattern, PATTERN_LEN / 2) != 0) {
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fprintf(stderr, "Mismatched pattern data iteration %zu\n", i);
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goto cleanup;
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}
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} else if (i == 9) {
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if (memcmp(buf, pattern, PATTERN_LEN / 2) != 0) {
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fprintf(stderr, "Mismatched pattern data iteration %zu\n", i);
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goto cleanup;
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}
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} else {
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if (memcmp(buf, pattern, PATTERN_LEN) != 0) {
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fprintf(stderr, "Mismatched pattern data iteration %zu\n", i);
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goto cleanup;
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}
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}
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}
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if (VIR_CLOSE(fd) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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if (st)
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virStreamFree(st);
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VIR_FORCE_CLOSE(fd);
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if (tmpfile != NULL)
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unlink(tmpfile);
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if (conn)
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virConnectClose(conn);
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VIR_FREE(tmpfile);
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VIR_FREE(pattern);
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VIR_FREE(buf);
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return ret;
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}
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static int testFDStreamWriteBlock(const void *data)
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{
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return testFDStreamWriteCommon(data, true);
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}
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static int testFDStreamWriteNonblock(const void *data)
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{
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return testFDStreamWriteCommon(data, false);
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}
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#define SCRATCHDIRTEMPLATE abs_builddir "/fakesysfsdir-XXXXXX"
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static int
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mymain(void)
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{
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char scratchdir[] = SCRATCHDIRTEMPLATE;
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int ret = 0;
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const char *iohelper = abs_builddir "/../src/libvirt_iohelper";
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virFDStreamSetIOHelper(iohelper);
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if (!mkdtemp(scratchdir)) {
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fprintf(stderr, "Cannot create fakesysfsdir");
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abort();
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}
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if (virtTestRun("Stream read blocking ", 1, testFDStreamReadBlock, scratchdir) < 0)
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ret = -1;
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if (virtTestRun("Stream read non-blocking ", 1, testFDStreamReadNonblock, scratchdir) < 0)
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ret = -1;
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if (virtTestRun("Stream write blocking ", 1, testFDStreamWriteBlock, scratchdir) < 0)
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ret = -1;
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if (virtTestRun("Stream write non-blocking ", 1, testFDStreamWriteNonblock, scratchdir) < 0)
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ret = -1;
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if (getenv("LIBVIRT_SKIP_CLEANUP") == NULL)
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virFileDeleteTree(scratchdir);
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return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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VIRT_TEST_MAIN(mymain)
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