fix: update soft block limit to 2MiB

This is needed because the 1MiB limit is the chunker limit, however the
actual blocks can be wrapped in protobuf which adds a small ~10 byte
overhead.

Author: Jorropo

core/commands/cmdutils/utils.go

@@ -11,13 +11,13 @@ import (
 
 const (
 	AllowBigBlockOptionName = "allow-big-block"
-	SoftBlockLimit          = 1024 * 1024 // https://github.com/ipfs/go-ipfs/issues/7421#issuecomment-910833499
+	SoftBlockLimit          = 1024 * 1024 * 2 // https://github.com/web3-storage/web3.storage/pull/1269#issuecomment-1108834504
 )
 
 var AllowBigBlockOption cmds.Option
 
 func init() {
-	AllowBigBlockOption = cmds.BoolOption(AllowBigBlockOptionName, "Disable block size check and allow creation of blocks bigger than 1MiB. WARNING: such blocks won't be transferable over the standard bitswap.").WithDefault(false)
+	AllowBigBlockOption = cmds.BoolOption(AllowBigBlockOptionName, "Disable block size check and allow creation of blocks bigger than 2MiB. WARNING: such blocks won't be transferable over the standard bitswap.").WithDefault(false)
 }
 
 func CheckCIDSize(req *cmds.Request, c cid.Cid, dagAPI coreiface.APIDagService) error {
@@ -40,11 +40,11 @@ func CheckBlockSize(req *cmds.Request, size uint64) error {
 		return nil
 	}
 
-	// We do not allow producing blocks bigger than 1 MiB to avoid errors
-	// when transmitting them over BitSwap. The 1 MiB constant is an
+	// We do not allow producing blocks bigger than 2MiB to avoid errors
+	// when transmitting them over BitSwap. The 2MiB constant is an
 	// unenforced and undeclared rule of thumb hard-coded here.
 	if size > SoftBlockLimit {
-		return fmt.Errorf("produced block is over 1MiB: big blocks can't be exchanged with other peers. consider using UnixFS for automatic chunking of bigger files, or pass --allow-big-block to override")
+		return fmt.Errorf("produced block is over 2MiB: big blocks can't be exchanged with other peers. consider using UnixFS for automatic chunking of bigger files, or pass --allow-big-block to override")
 	}
 	return nil
 

test/sharness/t0050-block.sh

@@ -291,17 +291,17 @@ test_expect_success "put with sha3 and cidv0 fails" '
 '
 
 test_expect_success "'ipfs block put' check block size" '
-    dd if=/dev/zero bs=2MB count=1 > 2-MB-file &&
-    test_expect_code 1 ipfs block put 2-MB-file >block_put_out 2>&1
+    dd if=/dev/zero bs=4MB count=1 > 4-MB-file &&
+    test_expect_code 1 ipfs block put 4-MB-file >block_put_out 2>&1
   '
 
   test_expect_success "ipfs block put output has the correct error" '
-    grep "produced block is over 1MiB" block_put_out
+    grep "produced block is over 2MiB" block_put_out
   '
 
   test_expect_success "ipfs block put --allow-big-block=true works" '
-    test_expect_code 0 ipfs block put 2-MB-file --allow-big-block=true &&
-    rm 2-MB-file
+    test_expect_code 0 ipfs block put 4-MB-file --allow-big-block=true &&
+    rm 4-MB-file
   '
 
 test_done

test/sharness/t0051-object.sh

@@ -225,16 +225,16 @@ test_object_cmd() {
 
   test_expect_success "'ipfs object patch' check output block size" '
     DIR=$(ipfs object new unixfs-dir)
-    for i in {1..13}
+    for i in {1..14}
     do
        DIR=$(ipfs object patch "$DIR" add-link "$DIR.jpg" "$DIR")
     done
-    # Fail when new block goes over the BS limit of 1MiB, but allow manual override
+    # Fail when new block goes over the BS limit of 2MiB, but allow manual override
     test_expect_code 1 ipfs object patch "$DIR" add-link "$DIR.jpg" "$DIR"  >patch_out 2>&1
   '
 
   test_expect_success "ipfs object patch add-link output has the correct error" '
-    grep "produced block is over 1MiB" patch_out
+    grep "produced block is over 2MiB" patch_out
   '
 
   test_expect_success "ipfs object patch --allow-big-block=true add-link works" '
@@ -310,7 +310,7 @@ test_object_cmd() {
   test_expect_success "'ipfs object stat --human' succeeds" '
     ipfs object stat $(cat multi_patch)/a --human > obj_stat_human_out
   '
-  
+
   test_expect_success "ipfs object stat --human output looks good" '
     echo "NumLinks:       1" > obj_stat_human_exp &&
     echo "BlockSize:      47" >> obj_stat_human_exp &&

test/sharness/t0053-dag.sh

@@ -45,17 +45,17 @@ test_dag_cmd() {
   '
 
 test_expect_success "'ipfs dag put' check block size" '
-    dd if=/dev/zero bs=2MB count=1 > 2-MB-file &&
-    test_expect_code 1 ipfs dag put --input-codec=raw --store-codec=raw 2-MB-file >dag_put_out 2>&1
+    dd if=/dev/zero bs=4MB count=1 > 4-MB-file &&
+    test_expect_code 1 ipfs dag put --input-codec=raw --store-codec=raw 4-MB-file >dag_put_out 2>&1
   '
 
   test_expect_success "ipfs dag put output has the correct error" '
-    grep "produced block is over 1MiB" dag_put_out
+    grep "produced block is over 2MiB" dag_put_out
   '
 
   test_expect_success "ipfs dag put --allow-big-block=true works" '
-    test_expect_code 0 ipfs dag put --input-codec=raw --store-codec=raw 2-MB-file --allow-big-block=true &&
-    rm 2-MB-file
+    test_expect_code 0 ipfs dag put --input-codec=raw --store-codec=raw 4-MB-file --allow-big-block=true &&
+    rm 4-MB-file
   '
 
   test_expect_success "can add an ipld object using dag-json to dag-json" '

test/sharness/t0054-dag-car-import-export.sh

@@ -234,16 +234,16 @@ test_expect_success "naked root import expected output" '
 '
 
 test_expect_success "'ipfs dag import' check block size" '
-    BIG_CID=$(dd if=/dev/zero bs=2MB count=1 | ipfs dag put --input-codec=raw --store-codec=raw --allow-big-block) &&
-    ipfs dag export $BIG_CID > 2-MB-block.car &&
-    test_expect_code 1 ipfs dag import 2-MB-block.car >dag_import_out 2>&1
+    BIG_CID=$(dd if=/dev/zero bs=4MB count=1 | ipfs dag put --input-codec=raw --store-codec=raw --allow-big-block) &&
+    ipfs dag export $BIG_CID > 4-MB-block.car &&
+    test_expect_code 1 ipfs dag import 4-MB-block.car >dag_import_out 2>&1
 '
 test_expect_success "ipfs dag import output has the correct error" '
-    grep "block is over 1MiB" dag_import_out
+    grep "block is over 2MiB" dag_import_out
 '
 
 test_expect_success "ipfs dag import --allow-big-block works" '
-    test_expect_code 0 ipfs dag import --allow-big-block 2-MB-block.car
+    test_expect_code 0 ipfs dag import --allow-big-block 4-MB-block.car
 '
 
 cat > version_2_import_expected << EOE