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btrfs: selftests: test RAID stripe-tree deletion spanning two items

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Add a selftest for RAID stripe-tree deletion with a delete range spanning
two items, so that we're punching a hole into two adjacent RAID stripe
extents truncating the first and "moving" the second to the right.

The following diagram illustrates the operation:

 |--- RAID Stripe Extent ---||--- RAID Stripe Extent ---|
 |-----  keep  -----|--- drop ---|-----  keep  ----|

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Johannes Thumshirn 2025-01-13 20:31:52 +01:00 committed by David Sterba
parent a0afdec255
commit 1d395c3926
1 changed files with 144 additions and 0 deletions
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144
fs/btrfs/tests/raid-stripe-tree-tests.c
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@ -31,6 +31,149 @@ static struct btrfs_device *btrfs_device_by_devid(struct btrfs_fs_devices *fs_de
return NULL;
}
/*
* Test a 1M RST write that spans two adjacent RST items on disk and then
* delete a portion starting in the first item and spanning into the second
* item. This is similar to test_front_delete(), but spanning multiple items.
*/
static int test_front_delete_prev_item(struct btrfs_trans_handle *trans)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_io_context *bioc;
struct btrfs_io_stripe io_stripe = { 0 };
u64 map_type = RST_TEST_RAID1_TYPE;
u64 logical1 = SZ_1M;
u64 logical2 = SZ_2M;
u64 len = SZ_1M;
int ret;
bioc = alloc_btrfs_io_context(fs_info, logical1, RST_TEST_NUM_DEVICES);
if (!bioc) {
test_std_err(TEST_ALLOC_IO_CONTEXT);
ret = -ENOMEM;
goto out;
}
io_stripe.dev = btrfs_device_by_devid(fs_info->fs_devices, 0);
bioc->map_type = map_type;
bioc->size = len;
/* Insert RAID extent 1. */
for (int i = 0; i < RST_TEST_NUM_DEVICES; i++) {
struct btrfs_io_stripe *stripe = &bioc->stripes[i];
stripe->dev = btrfs_device_by_devid(fs_info->fs_devices, i);
if (!stripe->dev) {
test_err("cannot find device with devid %d", i);
ret = -EINVAL;
goto out;
}
stripe->physical = logical1 + i * SZ_1G;
}
ret = btrfs_insert_one_raid_extent(trans, bioc);
if (ret) {
test_err("inserting RAID extent failed: %d", ret);
goto out;
}
bioc->logical = logical2;
/* Insert RAID extent 2, directly adjacent to it. */
for (int i = 0; i < RST_TEST_NUM_DEVICES; i++) {
struct btrfs_io_stripe *stripe = &bioc->stripes[i];
stripe->dev = btrfs_device_by_devid(fs_info->fs_devices, i);
if (!stripe->dev) {
test_err("cannot find device with devid %d", i);
ret = -EINVAL;
goto out;
}
stripe->physical = logical2 + i * SZ_1G;
}
ret = btrfs_insert_one_raid_extent(trans, bioc);
if (ret) {
test_err("inserting RAID extent failed: %d", ret);
goto out;
}
ret = btrfs_delete_raid_extent(trans, logical1 + SZ_512K, SZ_1M);
if (ret) {
test_err("deleting RAID extent [%llu, %llu] failed",
logical1 + SZ_512K, (u64)SZ_1M);
goto out;
}
/* Verify item 1 is truncated to 512K. */
ret = btrfs_get_raid_extent_offset(fs_info, logical1, &len, map_type, 0,
&io_stripe);
if (ret) {
test_err("lookup of RAID extent [%llu, %llu] failed", logical1,
logical1 + len);
goto out;
}
if (io_stripe.physical != logical1) {
test_err("invalid physical address, expected %llu got %llu",
logical1, io_stripe.physical);
ret = -EINVAL;
goto out;
}
if (len != SZ_512K) {
test_err("invalid stripe length, expected %llu got %llu",
(u64)SZ_512K, len);
ret = -EINVAL;
goto out;
}
/* Verify item 2's start is moved by 512K. */
ret = btrfs_get_raid_extent_offset(fs_info, logical2 + SZ_512K, &len,
map_type, 0, &io_stripe);
if (ret) {
test_err("lookup of RAID extent [%llu, %llu] failed",
logical2 + SZ_512K, logical2 + len);
goto out;
}
if (io_stripe.physical != logical2 + SZ_512K) {
test_err("invalid physical address, expected %llu got %llu",
logical2 + SZ_512K, io_stripe.physical);
ret = -EINVAL;
goto out;
}
if (len != SZ_512K) {
test_err("invalid stripe length, expected %llu got %llu",
(u64)SZ_512K, len);
ret = -EINVAL;
goto out;
}
/* Verify there's a hole at [1M+512K, 2M+512K] . */
len = SZ_1M;
ret = btrfs_get_raid_extent_offset(fs_info, logical1 + SZ_512K, &len,
map_type, 0, &io_stripe);
if (ret != -ENODATA) {
test_err("lookup of RAID [%llu, %llu] succeeded, should fail",
logical1 + SZ_512K, logical1 + SZ_512K + len);
goto out;
}
/* Clean up after us. */
ret = btrfs_delete_raid_extent(trans, logical1, SZ_512K);
if (ret)
goto out;
ret = btrfs_delete_raid_extent(trans, logical2 + SZ_512K, SZ_512K);
out:
btrfs_put_bioc(bioc);
return ret;
}
/*
* Test a 64K RST write on a 2 disk RAID1 at a logical address of 1M and then
* delete the 1st 32K, making the new start address 1M+32K.
@ -468,6 +611,7 @@ static const test_func_t tests[] = {
test_create_update_delete,
test_tail_delete,
test_front_delete,
test_front_delete_prev_item,
};
static int run_test(test_func_t test, u32 sectorsize, u32 nodesize)