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commit 82e6381e23f1ea7a14f418215068aaa2ca046c84 upstream.
Various changes in the "ext4: better scalability for ext4 block
allocation" patch series have resulted in kunit test failures, most
notably in the test_new_blocks_simple and the test_mb_mark_used tests.
The root cause of these failures is that various in-memory ext4 data
structures were not getting initialized, and while previous versions
of the functions exercised by the unit tests didn't use these
structure members, this was arguably a test bug.
Since one of the patches in the block allocation scalability patches
is a fix which is has a cc:stable tag, this commit also has a
cc:stable tag.
CC: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20250714130327.1830534-1-libaokun1@huawei.com
Link: https://patch.msgid.link/20250725021550.3177573-1-yi.zhang@huaweicloud.com
Link: https://patch.msgid.link/20250725021654.3188798-1-yi.zhang@huaweicloud.com
Reported-by: Guenter Roeck <linux@roeck-us.net>
Closes: https://lore.kernel.org/linux-ext4/b0635ad0-7ebf-4152-a69b-58e7e87d5085@roeck-us.net/
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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kunit_kzalloc() may return a NULL pointer, dereferencing it
without NULL check may lead to NULL dereference.
Add a NULL check for grp.
Fixes: ac96b56a2fbd ("ext4: Add unit test for mb_mark_used")
Fixes: b7098e1fa7bc ("ext4: Add unit test for mb_free_blocks")
Signed-off-by: Charles Han <hanchunchao@inspur.com>
Reviewed-by: Kemeng Shi <shikemeng@huaweicloud.com>
Link: https://patch.msgid.link/20250110092421.35619-1-hanchunchao@inspur.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Add test_mb_mark_used_cost to estimate cost of mb_mark_used
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Link: https://lore.kernel.org/r/20240424061904.987525-3-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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We expect inode with ext4_info_info type as following:
mbt_kunit_init
mbt_mb_init
ext4_mb_init
ext4_mb_init_backend
sbi->s_buddy_cache = new_inode(sb);
EXT4_I(sbi->s_buddy_cache)->i_disksize = 0;
Implement alloc_inode ionde with ext4_inode_info type to avoid
out-of-bounds write.
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240322165518.8147-1-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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sbi->s_dirtyclusters_counter before use in kunit test
Fix that sbi->s_freeclusters_counter and sbi->s_dirtyclusters_counter are
used before initialization.
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240304163543.6700-4-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Although there is no concurrent block allocation/free in unit test,
internal functions mb_mark_used and mb_free_blocks assert group
lock is always held. Acquire group before calling mb_mark_used and
mb_free_blocks in unit test to avoid the assertion.
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240304163543.6700-3-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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This fix the oops in ext4 unit test which is cuased by NULL sb.s_user_ns
as following:
<4>[ 14.344565] map_id_range_down (kernel/user_namespace.c:318)
<4>[ 14.345378] make_kuid (kernel/user_namespace.c:415)
<4>[ 14.345998] inode_init_always (include/linux/fs.h:1375 fs/inode.c:174)
<4>[ 14.346696] alloc_inode (fs/inode.c:268)
<4>[ 14.347353] new_inode_pseudo (fs/inode.c:1007)
<4>[ 14.348016] new_inode (fs/inode.c:1033)
<4>[ 14.348644] ext4_mb_init (fs/ext4/mballoc.c:3404 fs/ext4/mballoc.c:3719)
<4>[ 14.349312] mbt_kunit_init (fs/ext4/mballoc-test.c:57
fs/ext4/mballoc-test.c:314)
<4>[ 14.349983] kunit_try_run_case (lib/kunit/test.c:388 lib/kunit/test.c:443)
<4>[ 14.350696] kunit_generic_run_threadfn_adapter (lib/kunit/try-catch.c:30)
<4>[ 14.351530] kthread (kernel/kthread.c:388)
<4>[ 14.352168] ret_from_fork (arch/arm64/kernel/entry.S:861)
<0>[ 14.353385] Code: 52808004 b8236ae7 72be5e44 b90004c4 (38e368a1)
Alloc test super block from sget to properly initialize test super block
to fix the issue.
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240304163543.6700-2-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Storing an inode structure on the stack pushes some functions over the warning
limit for stack frame size:
In file included from fs/ext4/mballoc.c:7039:
fs/ext4/mballoc-test.c:506:13: error: stack frame size (1032) exceeds limit (1024) in 'test_mark_diskspace_used' [-Werror,-Wframe-larger-than]
506 | static void test_mark_diskspace_used(struct kunit *test)
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Use kunit_kzalloc() for all inodes. There may be a better way to do it by
preallocating the inode, which would result in a larger rework.
Fixes: 2b81493f8eb6 ("ext4: Add unit test for ext4_mb_mark_diskspace_used")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Kemeng Shi <shikemeng@huaweicloud.com>
Link: https://lore.kernel.org/r/20240227161548.2929881-1-arnd@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Add unit test for ext4_mb_mark_diskspace_used
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Link: https://lore.kernel.org/r/20240103104900.464789-6-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Add unit test for mb_free_blocks.
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Link: https://lore.kernel.org/r/20240103104900.464789-5-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Add unit test for mb_mark_used
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Link: https://lore.kernel.org/r/20240103104900.464789-4-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Add unit test of ext4_mb_generate_buddy
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Link: https://lore.kernel.org/r/20240103104900.464789-3-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Add unit test for test_free_blocks_simple.
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Link: https://lore.kernel.org/r/20240103104900.464789-2-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Use KUNIT_CASE_PARAM to run mballoc test with different layouts setting.
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Link: https://lore.kernel.org/r/20230928160407.142069-13-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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Here are prepared work:
1. Include mballoc-test.c to mballoc.c to be able test static function
in mballoc.c.
2. Implement static stub to avoid read IO to disk.
3. Construct fake super_block. Only partial members are set, more members
will be set when more functions are tested.
Then unit test for ext4_mb_new_blocks_simple is added.
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Link: https://lore.kernel.org/r/20230928160407.142069-12-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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