Date:   Wed, 14 Dec 2022 14:17:08 -0700
From:   Andreas Dilger <adilger@...ger.ca>
To:     "Ritesh Harjani (IBM)" <ritesh.list@...il.com>
Cc:     Theodore Ts'o <tytso@....edu>, linux-ext4@...r.kernel.org,
        Harshad Shirwadkar <harshadshirwadkar@...il.com>,
        Wang Shilong <wangshilong1991@...il.com>, Li Xi <lixi@....com>
Subject: Re: [RFCv1 16/72] tst_libext2fs_pthread: Add libext2fs merge/clone
 unit tests

On Nov 7, 2022, at 5:21 AM, Ritesh Harjani (IBM) <ritesh.list@...il.com> wrote:
> 
> This adds a unit tests for libext2fs merge/clone apis and uses pthreads
> to test the functionality correctly.
> 
> TODO:
> We can also add EXT2FS_CLONE_BADBLOCKS and EXT2FS_CLONE_DBLIST test as well
> into it.
> 
> Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@...il.com>

Reviewed-by: Andreas Dilger <adilger@...ger.ca>

> ---
> lib/ext2fs/Makefile.in             |  17 +-
> lib/ext2fs/tst_libext2fs_pthread.c | 315 +++++++++++++++++++++++++++++
> 2 files changed, 330 insertions(+), 2 deletions(-)
> create mode 100644 lib/ext2fs/tst_libext2fs_pthread.c
> 
> diff --git a/lib/ext2fs/Makefile.in b/lib/ext2fs/Makefile.in
> index c0694175..5fde9900 100644
> --- a/lib/ext2fs/Makefile.in
> +++ b/lib/ext2fs/Makefile.in
> @@ -229,6 +229,7 @@ SRCS= ext2_err.c \
> 	$(srcdir)/tst_libext2fs.c \
> 	$(srcdir)/tst_bitmaps_standalone.c \
> 	$(srcdir)/tst_bitmaps_pthread.c \
> +	$(srcdir)/tst_libext2fs_pthread.c \
> 	$(DEBUG_SRCS)
> 
> HFILES= bitops.h ext2fs.h ext2_io.h ext2_fs.h ext2_ext_attr.h ext3_extents.h \
> @@ -374,6 +375,11 @@ tst_bitmaps_pthread: tst_bitmaps_pthread.o $(STATIC_LIBEXT2FS) $(DEPSTATIC_LIBCO
> 	$(Q) $(CC) -o tst_bitmaps_pthread tst_bitmaps_pthread.o $(ALL_LDFLAGS) \
> 		$(STATIC_LIBEXT2FS) $(STATIC_LIBCOM_ERR) $(SYSLIBS)
> 
> +tst_libext2fs_pthread: tst_libext2fs_pthread.o $(STATIC_LIBEXT2FS) $(DEPSTATIC_LIBCOM_ERR)
> +	$(E) "	LD $@"
> +	$(Q) $(CC) -o tst_libext2fs_pthread tst_libext2fs_pthread.o $(ALL_LDFLAGS) \
> +		$(STATIC_LIBEXT2FS) $(STATIC_LIBCOM_ERR) $(SYSLIBS)
> +
> ext2_tdbtool: tdbtool.o
> 	$(E) "	LD $@"
> 	$(Q) $(CC) -o ext2_tdbtool tdbtool.o tdb.o $(ALL_LDFLAGS) $(SYSLIBS)
> @@ -546,7 +552,7 @@ fullcheck check:: tst_bitops tst_badblocks tst_iscan tst_types tst_icount \
>     tst_super_size tst_types tst_inode_size tst_csum tst_crc32c tst_bitmaps \
>     tst_inline tst_inline_data tst_libext2fs tst_sha256 tst_sha512 \
>     tst_digest_encode tst_getsize tst_getsectsize tst_bitmaps_standalone \
> -	tst_bitmaps_pthread
> +	tst_bitmaps_pthread tst_libext2fs_pthread
> 	$(TESTENV) ./tst_bitops
> 	$(TESTENV) ./tst_badblocks
> 	$(TESTENV) ./tst_iscan
> @@ -571,6 +577,7 @@ fullcheck check:: tst_bitops tst_badblocks tst_iscan tst_types tst_icount \
> 	$(TESTENV) ./tst_digest_encode
> 	$(TESTENV) ./tst_bitmaps_standalone
> 	$(TESTENV) ./tst_bitmaps_pthread
> +	$(TESTENV) ./tst_libext2fs_pthread
> 
> installdirs::
> 	$(E) "	MKDIR_P $(libdir) $(includedir)/ext2fs"
> @@ -606,7 +613,7 @@ clean::
> 		tst_bitmaps tst_bitmaps_out tst_extents tst_inline \
> 		tst_inline_data tst_inode_size tst_bitmaps_cmd.c \
> 		tst_digest_encode tst_sha256 tst_sha512  tst_bitmaps_standalone \
> -		tst_bitmaps_pthread \
> +		tst_bitmaps_pthread tst_libext2fs_pthread \
> 		ext2_tdbtool mkjournal debug_cmds.c tst_cmds.c extent_cmds.c \
> 		../libext2fs.a ../libext2fs_p.a ../libext2fs_chk.a \
> 		crc32c_table.h gen_crc32ctable tst_crc32c tst_libext2fs \
> @@ -1184,6 +1191,12 @@ tst_bitmaps_pthread.o: $(srcdir)/tst_bitmaps_pthread.c $(top_builddir)/lib/confi
>  $(srcdir)/ext2_fs.h $(srcdir)/ext3_extents.h $(top_srcdir)/lib/et/com_err.h \
>  $(srcdir)/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
>  $(srcdir)/ext2_ext_attr.h $(srcdir)/hashmap.h $(srcdir)/bitops.h
> +tst_libext2fs_pthread.o: $(srcdir)/tst_libext2fs_pthread.c $(top_builddir)/lib/config.h \
> + $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
> + $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fs.h \
> + $(srcdir)/ext2_fs.h $(srcdir)/ext3_extents.h $(top_srcdir)/lib/et/com_err.h \
> + $(srcdir)/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
> + $(srcdir)/ext2_ext_attr.h $(srcdir)/hashmap.h $(srcdir)/bitops.h
> undo_io.o: $(srcdir)/undo_io.c $(top_builddir)/lib/config.h \
>  $(top_builddir)/lib/dirpaths.h $(srcdir)/ext2_fs.h \
>  $(top_builddir)/lib/ext2fs/ext2_types.h $(srcdir)/ext2fs.h \
> diff --git a/lib/ext2fs/tst_libext2fs_pthread.c b/lib/ext2fs/tst_libext2fs_pthread.c
> new file mode 100644
> index 00000000..a5bb6fcd
> --- /dev/null
> +++ b/lib/ext2fs/tst_libext2fs_pthread.c
> @@ -0,0 +1,315 @@
> +#include "config.h"
> +#include <stdio.h>
> +#include <string.h>
> +#include <assert.h>
> +#if HAVE_UNISTD_H
> +#include <unistd.h>
> +#endif
> +#include <fcntl.h>
> +#include <time.h>
> +#include <sys/stat.h>
> +#include <sys/types.h>
> +#if HAVE_ERRNO_H
> +#include <errno.h>
> +#endif
> +#if HAVE_PTHREAD
> +#include <pthread.h>
> +#endif
> +
> +#include "ext2_fs.h"
> +#include "ext2fs.h"
> +
> +#ifdef HAVE_PTHREAD
> +int test_fail = 0;
> +ext2_filsys testfs;
> +ext2fs_inode_bitmap	inode_used_map;
> +ext2fs_block_bitmap block_used_map;
> +ext2_filsys childfs[2];
> +pthread_t pthread_infos[2];
> +
> +#define nr_bits 16384
> +int nr_threads = 2;
> +
> +int should_mark_bit()
> +{
> +	return rand() % 2 == 0;
> +}
> +
> +void setupfs()
> +{
> +	errcode_t retval;
> +	struct ext2_super_block param;
> +
> +	initialize_ext2_error_table();
> +
> +	memset(&param, 0, sizeof(param));
> +	ext2fs_blocks_count_set(&param, nr_bits);
> +	retval = ext2fs_initialize("test fs", EXT2_FLAG_64BITS, &param,
> +							   test_io_manager, &testfs);
> +	if (retval) {
> +		com_err("setup", retval, "while initializing filesystem");
> +		exit(1);
> +	}
> +
> +	retval = ext2fs_allocate_tables(testfs);
> +	if (retval) {
> +		com_err("setup", retval, "while allocating tables for testfs");
> +		exit(1);
> +	}
> +}
> +
> +void setup_used_bitmaps()
> +{
> +	int saved_type = testfs->default_bitmap_type;
> +	ext2_inode_scan scan;
> +	struct ext2_inode inode;
> +	ext2_ino_t ino;
> +	errcode_t retval;
> +	int i;
> +
> +	testfs->default_bitmap_type = EXT2FS_BMAP64_BITARRAY;
> +
> +	/* allocate block and inode used bitmaps */
> +	retval = ext2fs_allocate_block_bitmap(testfs, "block used map", &block_used_map);
> +	if (retval)
> +		goto out;
> +
> +	retval = ext2fs_allocate_inode_bitmap(testfs, "inode used map", &inode_used_map);
> +	if (retval)
> +		goto out;
> +
> +	/* setup block and inode used bitmaps */
> +	for (i = 1; i < nr_bits; i++) {
> +		/*
> +		 * we check for testfs->block_map as well since there could be some
> +		 * blocks already set as part of the FS metadata.
> +		 */
> +		if (should_mark_bit() || ext2fs_test_block_bitmap2(testfs->block_map, i)) {
> +			ext2fs_mark_block_bitmap2(block_used_map, i);
> +		}
> +	}
> +
> +	retval = ext2fs_open_inode_scan(testfs, 8, &scan);
> +	if (retval) {
> +		com_err("setup_inode_map", retval, "while open inode scan");
> +		exit(1);
> +	}
> +
> +	retval = ext2fs_get_next_inode(scan, &ino, &inode);
> +	if (retval) {
> +		com_err("setup_inode_map", retval, "while getting next inode");
> +		exit(1);
> +	}
> +
> +	while (ino) {
> +		if (should_mark_bit())
> +			ext2fs_mark_inode_bitmap2(inode_used_map, ino);
> +
> +		retval = ext2fs_get_next_inode(scan, &ino, &inode);
> +		if (retval) {
> +			com_err("setup_inode_map", retval, "while getting next inode");
> +			exit(1);
> +		}
> +	}
> +	ext2fs_close_inode_scan(scan);
> +
> +	testfs->default_bitmap_type = saved_type;
> +	return;
> +out:
> +	com_err("setup_used_bitmaps", retval, "while setting up bitmaps\n");
> +	exit(1);
> +}
> +
> +void setup_childfs()
> +{
> +	errcode_t retval;
> +	int i;
> +
> +	for (i = 0; i < nr_threads; i++) {
> +		retval = ext2fs_clone_fs(testfs, &childfs[i], EXT2FS_CLONE_INODE | EXT2FS_CLONE_BLOCK);
> +		if (retval) {
> +			com_err("setup_childfs", retval, "while clone testfs for childfs");
> +			exit(1);
> +		}
> +
> +		retval = childfs[i]->io->manager->open(childfs[i]->device_name,
> +											IO_FLAG_THREADS | IO_FLAG_NOCACHE, &childfs[i]->io);
> +		if (retval) {
> +			com_err("setup_pthread", retval, "while opening childfs");
> +			exit(1);
> +		}
> +		assert(childfs[i]->parent == testfs);
> +	}
> +}
> +
> +static errcode_t scan_callback(ext2_filsys fs,
> +			       ext2_inode_scan scan EXT2FS_ATTR((unused)),
> +			       dgrp_t group, void *priv_data)
> +{
> +	pthread_t id = *((pthread_t *)priv_data);
> +
> +	printf("%s: Called for group %d via thread %d\n", __func__, group,
> +			pthread_equal(pthread_infos[1], id));
> +	if (pthread_equal(pthread_infos[0], id)) {
> +		if (group >= fs->group_desc_count / 2 - 1)
> +			return 1;
> +	}
> +	return 0;
> +}
> +
> +static void *run_pthread(void *arg)
> +{
> +	errcode_t retval = 0;
> +	int i = 0, start, end;
> +	ext2fs_block_bitmap test_block_bitmap;
> +	ext2fs_inode_bitmap test_inode_bitmap;
> +	ext2_inode_scan scan;
> +	struct ext2_inode inode;
> +	ext2_ino_t ino;
> +	pthread_t id = pthread_self();
> +
> +	if (pthread_equal(pthread_infos[0], id)) {
> +		start = 1;
> +		end = nr_bits/2;
> +		test_block_bitmap = childfs[0]->block_map;
> +		test_inode_bitmap = childfs[0]->inode_map;
> +
> +		retval = ext2fs_open_inode_scan(childfs[0], 8, &scan);
> +		if (retval) {
> +			com_err("setup_inode_map", retval, "while open inode scan");
> +			exit(1);
> +		}
> +
> +	} else {
> +		start = nr_bits / 2 + 1;;
> +		end = nr_bits - 1;
> +		test_block_bitmap = childfs[1]->block_map;
> +		test_inode_bitmap = childfs[1]->inode_map;
> +
> +		retval = ext2fs_open_inode_scan(childfs[1], 8, &scan);
> +		if (retval) {
> +			com_err("setup_inode_map", retval, "while open inode scan");
> +			exit(1);
> +		}
> +		ext2fs_inode_scan_goto_blockgroup(scan, testfs->group_desc_count/2);
> +	}
> +
> +	ext2fs_set_inode_callback(scan, scan_callback, &id);
> +
> +	/* blocks scan */
> +	for (i = start; i <= end; i++) {
> +		if (ext2fs_test_block_bitmap2(block_used_map, i)) {
> +			ext2fs_mark_block_bitmap2(test_block_bitmap, i);
> +		}
> +	}
> +
> +	/* inodes scan */
> +	retval = ext2fs_get_next_inode(scan, &ino, &inode);
> +	if (retval) {
> +		com_err("setup_inode_map", retval, "while getting next inode");
> +		exit(1);
> +	}
> +
> +	while (ino) {
> +		if (ext2fs_test_inode_bitmap2(inode_used_map, ino)) {
> +			ext2fs_mark_inode_bitmap2(test_inode_bitmap, ino);
> +		}
> +
> +		retval = ext2fs_get_next_inode(scan, &ino, &inode);
> +		if (retval)
> +			break;
> +	}
> +	ext2fs_close_inode_scan(scan);
> +	return NULL;
> +}
> +
> +void run_pthreads()
> +{
> +	errcode_t retval;
> +	int i;
> +
> +	for (i = 0; i < nr_threads; i++) {
> +		printf("Starting thread (%d)\n", i);
> +		retval = pthread_create(&pthread_infos[i], NULL, &run_pthread, NULL);
> +		if (retval) {
> +			com_err("run_pthreads", retval, "while pthread_create");
> +			exit(1);
> +		}
> +	}
> +
> +	for (i = 0; i < nr_threads; i++) {
> +		void *status;
> +		int ret;
> +		retval = pthread_join(pthread_infos[i], &status);
> +		if (retval) {
> +			com_err("run_pthreads", retval, "while joining pthreads");
> +			exit(1);
> +
> +		}
> +		ret = status == NULL ? 0 : *(int*)status;
> +		if (ret) {
> +			com_err("run_pthreads", ret, "pthread returned error");
> +			test_fail++;
> +		}
> +
> +		printf("Closing thread (%d), ret(%d)\n", i, ret);
> +	}
> +
> +	assert(ext2fs_merge_fs(&childfs[0]) == 0);
> +	assert(ext2fs_merge_fs(&childfs[1]) == 0);
> +}
> +
> +void test_bitmaps()
> +{
> +	errcode_t retval;
> +	retval = ext2fs_compare_block_bitmap(testfs->block_map, block_used_map);
> +	if (retval) {
> +		printf("Block bitmap compare -- NOT OK!! (%ld)\n", retval);
> +		test_fail++;
> +	}
> +
> +	printf("Block compare bitmap  -- OK!!\n");
> +	retval = ext2fs_compare_inode_bitmap(testfs->inode_map, inode_used_map);
> +	if (retval) {
> +		printf("Inode bitmap compare -- NOT OK!! (%ld)\n", retval);
> +		test_fail++;
> +	}
> +	printf("Inode compare bitmap  -- OK!!\n");
> +}
> +
> +void free_used_bitmaps()
> +{
> +	ext2fs_free_block_bitmap(block_used_map);
> +	ext2fs_free_inode_bitmap(inode_used_map);
> +}
> +
> +#endif
> +
> +int main(int argc, char *argv[])
> +{
> +	int i;
> +
> +#ifndef HAVE_PTHREAD
> +	printf("No PTHREAD support, exiting...\n");
> +	return 0;
> +#else
> +
> +	srand(time(0));
> +
> +	setupfs();
> +	setup_used_bitmaps();
> +
> +	setup_childfs();
> +	run_pthreads();
> +	test_bitmaps(i);
> +
> +	if (test_fail)
> +		printf("%s: Test libext2fs clone/merge with pthreads NOT OK!!\n", argv[0]);
> +	else
> +		printf("%s: Test libext2fs clone/merge with pthreads OK!!\n", argv[0]);
> +	free_used_bitmaps();
> +	ext2fs_free(testfs);
> +
> +	return test_fail;
> +#endif
> +}
> --
> 2.37.3
> 


Cheers, Andreas






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