btrfs: selftests: add a selftest for deleting two out of three extents

Add a selftest creating three extents and then deleting two out of the
three extents.

Reviewed-by: Filipe Manana <[email protected]>
Signed-off-by: Johannes Thumshirn <[email protected]>
Signed-off-by: David Sterba <[email protected]>

diff --git a/fs/btrfs/tests/raid-stripe-tree-tests.c b/fs/btrfs/tests/raid-stripe-tree-tests.c
index 482e10b0d7ed42c8cb7a7f4de05f75d1bc9fb9dc..a7bc58a5c1e2c5e9212f5113de8284229e5d4a40 100644 (file)
--- a/fs/btrfs/tests/raid-stripe-tree-tests.c
+++ b/fs/btrfs/tests/raid-stripe-tree-tests.c
@@ -213,6 +213,149 @@ out:
        return ret;
 }
 
+static int test_delete_two_extents(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 len1 = SZ_1M;
+       u64 logical2 = logical1 + len1;
+       u64 len2 = SZ_1M;
+       u64 logical3 = logical2 + len2;
+       u64 len3 = 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);
+
+       /* Prepare for the test, 1st create 3 x 1M extents. */
+       bioc->map_type = map_type;
+       bioc->size = len1;
+
+       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;
+       bioc->size = len2;
+       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;
+       }
+
+       bioc->logical = logical3;
+       bioc->size = len3;
+       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 = logical3 + i * SZ_1G;
+       }
+
+       ret = btrfs_insert_one_raid_extent(trans, bioc);
+       if (ret) {
+               test_err("inserting RAID extent failed: %d", ret);
+               goto out;
+       }
+
+       /*
+        * Delete a range starting at logical1 and 2M in length. Extents 1
+        * and 2 are dropped and extent 3 is kept as is.
+        */
+       ret = btrfs_delete_raid_extent(trans, logical1, len1 + len2);
+       if (ret) {
+               test_err("deleting RAID extent [%llu, %llu] failed",
+                        logical1, logical1 + len1 + len2);
+               goto out;
+       }
+
+       ret = btrfs_get_raid_extent_offset(fs_info, logical1, &len1, map_type,
+                                          0, &io_stripe);
+       if (ret != -ENODATA) {
+               test_err("lookup of RAID extent [%llu, %llu] succeeded, should fail",
+                        logical1, len1);
+               goto out;
+       }
+
+       ret = btrfs_get_raid_extent_offset(fs_info, logical2, &len2, map_type,
+                                          0, &io_stripe);
+       if (ret != -ENODATA) {
+               test_err("lookup of RAID extent [%llu, %llu] succeeded, should fail",
+                        logical2, len2);
+               goto out;
+       }
+
+       ret = btrfs_get_raid_extent_offset(fs_info, logical3, &len3, map_type,
+                                          0, &io_stripe);
+       if (ret) {
+               test_err("lookup of RAID extent [%llu, %llu] failed",
+                        logical3, len3);
+               goto out;
+       }
+
+       if (io_stripe.physical != logical3) {
+               test_err("invalid physical address, expected %llu, got %llu",
+                        logical3, io_stripe.physical);
+               ret = -EINVAL;
+               goto out;
+       }
+
+       if (len3 != SZ_1M) {
+               test_err("invalid stripe length, expected %llu, got %llu",
+                        (u64)SZ_1M, len3);
+               ret = -EINVAL;
+               goto out;
+       }
+
+       ret = btrfs_delete_raid_extent(trans, logical3, len3);
+out:
+       btrfs_put_bioc(bioc);
+       return ret;
+}
+
 /* Test punching a hole into a single RAID stripe-extent. */
 static int test_punch_hole(struct btrfs_trans_handle *trans)
 {
@@ -935,6 +1078,7 @@ static const test_func_t tests[] = {
        test_front_delete_prev_item,
        test_punch_hole,
        test_punch_hole_3extents,
+       test_delete_two_extents,
 };
 
 static int run_test(test_func_t test, u32 sectorsize, u32 nodesize)