feat!: dag import - don't pin roots by default (#9926)

* feat!: dag import - don't pin roots by default

Fixes: #9765

* test(ipip-402): dag import

this adds basic regression test that guards behavior
around partial cars with or without pinning

* docs(ipip-402): ipip and dag import changelog

---------

Co-authored-by: Marcin Rataj <lidel@lidel.org>

Author: rvagg

core/commands/dag/dag.go

@@ -176,13 +176,16 @@ var DagImportCmd = &cmds.Command{
 		Tagline: "Import the contents of .car files",
 		ShortDescription: `
 'ipfs dag import' imports all blocks present in supplied .car
-( Content Address aRchive ) files, recursively pinning any roots
-specified in the CAR file headers, unless --pin-roots is set to false.
+( Content Address aRchive ) files, optionally recursively pinning any
+roots specified in the CAR file headers if --pin-roots is set.
 
 Note:
   This command will import all blocks in the CAR file, not just those
-  reachable from the specified roots. However, these other blocks will
-  not be pinned and may be garbage collected later.
+  reachable from the specified roots. However, when using --pin-roots,
+  these other blocks will not be pinned and may be garbage collected
+  later. When not using --pin-roots, all blocks imported may be garbage
+  collected if no other pin operation is performed on them, or a root
+  that references them.
 
   The pinning of the roots happens after all car files are processed,
   permitting import of DAGs spanning multiple files.
@@ -200,7 +203,7 @@ Specification of CAR formats: https://ipld.io/specs/transport/car/
 		cmds.FileArg("path", true, true, "The path of a .car file.").EnableStdin(),
 	},
 	Options: []cmds.Option{
-		cmds.BoolOption(pinRootsOptionName, "Pin optional roots listed in the .car headers after importing.").WithDefault(true),
+		cmds.BoolOption(pinRootsOptionName, "Pin optional roots listed in the .car headers after importing."),
 		cmds.BoolOption(silentOptionName, "No output."),
 		cmds.BoolOption(statsOptionName, "Output stats."),
 		cmdutils.AllowBigBlockOption,

docs/changelogs/v0.21.md

@@ -11,8 +11,10 @@
   - [`client/rpc` migration of `go-ipfs-http-client`](#clientrpc-migration-of-go-ipfs-http-client)
   - [Gateway: DAG-CBOR/-JSON previews and improved error pages](#gateway-dag-cbor-json-previews-and-improved-error-pages)
   - [Gateway: subdomain redirects are now `text/html`](#gateway-subdomain-redirects-are-now-texthtml)
+  - [Gateway: support for partial CAR export parameters (IPIP-402)](#gateway-support-for-partial-car-export-parameters-ipip-402)
+  - [`ipfs dag import` no longer pins by default](#ipfs-dag-import-no-longer-pins-by-default)
   - [`ipfs dag stat` deduping statistics](#ipfs-dag-stat-deduping-statistics)
-  - [Accelerated DHT Client is no longer experimental](#--empty-repo-is-now-the-default)
+  - [Accelerated DHT Client is no longer experimental](#accelerated-dht-client-is-no-longer-experimental)
 - [📝 Changelog](#-changelog)
 - [👨‍👩‍👧‍👦 Contributors](#-contributors)
 
@@ -104,9 +106,36 @@ $ curl "https://subdomain-gw.example.net/ipfs/${cid}/"
 
 Rationale can be found in [kubo#9913](https://github.com/ipfs/kubo/pull/9913).
 
-#### Gateway: support for CAR parameters of IPIP-402
+#### Gateway: support for partial CAR export parameters (IPIP-402)
 
-The gateway now supports partial CAR export parameters as indicated in [IPIP-402](https://github.com/ipfs/specs/pull/402).
+The gateway now supports optional CAR export parameters
+`dag-scope=block|entity|all` and `entity-bytes=from:to` as specified in
+[IPIP-402](https://github.com/ipfs/specs/pull/402).
+
+Batch block retrieval minimizes round trips, catering to the requirements of
+light HTTP clients for directory enumeration, range requests, and content path
+resolution.
+
+#### `ipfs dag import` no longer pins by default
+
+With the gateway now capable of handling partial CAR exports
+([IPIP-402](https://github.com/ipfs/specs/pull/402)) and incomplete DAG CARs
+becoming more prevalent, there have been changes to the pinning mode when using
+`ipfs dag import`.
+
+Recursive pinning of the entire DAG within an imported CAR is now optional.  To
+explicitly attempt pinning the DAG referenced by any roots present in the CAR,
+you can opt in by using the `--pin-roots` option.
+
+Pinning incomplete DAG will produce an error:
+
+```console
+$ curl 'http://127.0.0.1:8080/ipns/docs.ipfs.tech?format=car&dag-scope=entity' > ./partial-entity.car # Kubo 0.21.0 with IPIP-402 (only root block of unixfs dir)
+$ ipfs dag import --stats --pin-roots=true ./partial-entity.car
+Error pinning	QmPDC11yLAbVw3dX5jMeEuSdk4BiVjSd9X87zaYRdVjzW3	FAILED: block was not found locally (offline): ipld: could not find QmPDvrDAz2aHeLjPVQ4uh1neyknUmDpf1GsBzAbpFhS8ro
+Imported 1 blocks (1618 bytes)
+[exit code 1]
+```
 
 #### `ipfs dag stat` deduping statistics
 

test/sharness/t0054-dag-car-import-export-data/README.md

@@ -26,3 +26,7 @@
 - lotus_devnet_genesis_v2.car
   - generated with `car index lotus_testnet_export_128.car > lotus_testnet_export_128_v2.car`
   - install `go-car` CLI from https://github.com/ipld/go-car
+
+- partial-dag-scope-entity.car
+  - unixfs directory entity exported from gateway via `?format=car&dag-scope=entity` ([IPIP-402](https://github.com/ipfs/specs/pull/402))
+  - CAR roots includes directory CID, but only the root block is included in the CAR, making the DAG incomplete

test/sharness/t0054-dag-car-import-export-data/partial-dag-scope-entity.car

@@ -41,7 +41,7 @@ do_import() {
       while [[ -e spin.gc ]]; do ipfsi "$node" repo gc &>/dev/null; done &
       while [[ -e spin.gc ]]; do ipfsi "$node" repo gc &>/dev/null; done &
 
-      ipfsi "$node" dag import "$@" 2>&1 && ipfsi "$node" repo verify &>/dev/null
+      ipfsi "$node" dag import --pin-roots "$@" 2>&1 && ipfsi "$node" repo verify &>/dev/null
       result=$?
 
       rm -f spin.gc &>/dev/null
@@ -117,7 +117,7 @@ EOE
   '
 
   test_expect_success "import/pin naked roots only, relying on local blockstore having all the data" '
-    ipfsi 1 dag import --stats --enc=json ../t0054-dag-car-import-export-data/combined_naked_roots_genesis_and_128.car \
+    ipfsi 1 dag import --stats --enc=json --pin-roots ../t0054-dag-car-import-export-data/combined_naked_roots_genesis_and_128.car \
       > naked_import_result_json_actual
   '
 
@@ -197,14 +197,14 @@ EOE
 head -3 multiroot_import_json_stats_expected > multiroot_import_json_expected
 
 test_expect_success "multiroot import works (--enc=json)" '
-  ipfs dag import --enc=json ../t0054-dag-car-import-export-data/lotus_testnet_export_256_multiroot.car > multiroot_import_json_actual
+  ipfs dag import --enc=json --pin-roots ../t0054-dag-car-import-export-data/lotus_testnet_export_256_multiroot.car > multiroot_import_json_actual
 '
 test_expect_success "multiroot import expected output" '
   test_cmp_sorted multiroot_import_json_expected multiroot_import_json_actual
 '
 
 test_expect_success "multiroot import works with --stats" '
-  ipfs dag import --stats --enc=json ../t0054-dag-car-import-export-data/lotus_testnet_export_256_multiroot.car > multiroot_import_json_actual
+  ipfs dag import --stats --enc=json --pin-roots ../t0054-dag-car-import-export-data/lotus_testnet_export_256_multiroot.car > multiroot_import_json_actual
 '
 test_expect_success "multiroot import expected output" '
   test_cmp_sorted multiroot_import_json_stats_expected multiroot_import_json_actual
@@ -215,18 +215,18 @@ cat >pin_import_expected << EOE
 {"Stats":{"BlockCount":1198,"BlockBytesCount":468513}}
 EOE
 test_expect_success "pin-less import works" '
-  ipfs dag import --stats --enc=json --pin-roots=false \
+  ipfs dag import --stats --enc=json \
   ../t0054-dag-car-import-export-data/lotus_devnet_genesis.car \
   ../t0054-dag-car-import-export-data/lotus_testnet_export_128.car \
     > no-pin_import_actual
 '
-test_expect_success "expected no pins on --pin-roots=false" '
+test_expect_success "expected no pins on" '
   test_cmp pin_import_expected no-pin_import_actual
 '
 
 
 test_expect_success "naked root import works" '
-  ipfs dag import --stats --enc=json ../t0054-dag-car-import-export-data/combined_naked_roots_genesis_and_128.car \
+  ipfs dag import --stats --enc=json --pin-roots ../t0054-dag-car-import-export-data/combined_naked_roots_genesis_and_128.car \
     > naked_root_import_json_actual
 '
 test_expect_success "naked root import expected output" '
@@ -253,7 +253,7 @@ cat > version_2_import_expected << EOE
 EOE
 
 test_expect_success "version 2 import" '
-  ipfs dag import --stats --enc=json \
+  ipfs dag import --stats --enc=json --pin-roots \
     ../t0054-dag-car-import-export-data/lotus_testnet_export_128_v2.car \
     ../t0054-dag-car-import-export-data/lotus_devnet_genesis_v2.car \
   > version_2_import_actual
@@ -291,4 +291,26 @@ test_expect_success "'ipfs dag import' decode IPLD 'cbor' codec works" '
   rm cbor.car
 '
 
+# IPIP-402
+cat > partial_nopin_import_expected << EOE
+{"Stats":{"BlockCount":1,"BlockBytesCount":1618}}
+EOE
+test_expect_success "'ipfs dag import' without pinning works fine with incomplete DAG (unixfs dir exported as dag-scope=entity from IPIP-402)" '
+    ipfs dag import --stats --enc=json --pin-roots=false ../t0054-dag-car-import-export-data/partial-dag-scope-entity.car >partial_nopin_import_out 2>&1 &&
+    test_cmp partial_nopin_import_expected partial_nopin_import_out
+'
+test_expect_success "'ipfs dag import' with no params in CLI mode produces exit code 0 (unixfs dir exported as dag-scope=entity from IPIP-402)" '
+    test_expect_code 0 ipfs dag import ../t0054-dag-car-import-export-data/partial-dag-scope-entity.car
+'
+
+test_expect_success "'ipfs dag import' with pinning errors due to incomplete DAG (unixfs dir exported as dag-scope=entity from IPIP-402)" '
+    ipfs dag import --stats --enc=json --pin-roots=true ../t0054-dag-car-import-export-data/partial-dag-scope-entity.car >partial_pin_import_out 2>&1 &&
+    test_should_contain "\"PinErrorMsg\":\"block was not found locally" partial_pin_import_out
+'
+
+test_expect_success "'ipfs dag import' pin error in default CLI mode produces exit code 1 (unixfs dir exported as dag-scope=entity from IPIP-402)" '
+    test_expect_code 1 ipfs dag import --pin-roots ../t0054-dag-car-import-export-data/partial-dag-scope-entity.car >partial_pin_import_out 2>&1 &&
+    test_should_contain "Error: pinning root \"QmPDC11yLAbVw3dX5jMeEuSdk4BiVjSd9X87zaYRdVjzW3\" FAILED: block was not found locally" partial_pin_import_out
+'
+
 test_done

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

@@ -14,7 +14,7 @@ test_launch_ipfs_daemon
 # Import test case
 # Run `ipfs cat /ipfs/$REDIRECTS_DIR_CID/_redirects` to see sample _redirects file
 test_expect_success "Add the _redirects file test directory" '
-  ipfs dag import ../t0109-gateway-web-_redirects-data/redirects.car
+  ipfs dag import --pin-roots ../t0109-gateway-web-_redirects-data/redirects.car
 '
 CAR_ROOT_CID=QmQyqMY5vUBSbSxyitJqthgwZunCQjDVtNd8ggVCxzuPQ4
 

test/sharness/t0109-gateway-web-_redirects.sh

@@ -12,7 +12,7 @@ test_launch_ipfs_daemon
 # Import test case
 # See the static fixtures in ./t0113-gateway-symlink/
 test_expect_success "Add the test directory with symlinks" '
-  ipfs dag import ../t0113-gateway-symlink/testfiles.car
+  ipfs dag import --pin-roots ../t0113-gateway-symlink/testfiles.car
 '
 ROOT_DIR_CID=QmWvY6FaqFMS89YAQ9NAPjVP4WZKA1qbHbicc9HeSKQTgt # ./testfiles/
 

test/sharness/t0113-gateway-symlink.sh

@@ -113,7 +113,7 @@ IPNS_ED25519_B58MH=12D3KooWLQzUv2FHWGVPXTXSZpdHs7oHbXub2G5WC8Tx4NQhyd2d
 IPNS_ED25519_B36CID=k51qzi5uqu5dk3v4rmjber23h16xnr23bsggmqqil9z2gduiis5se8dht36dam
 
 test_expect_success "Add the test fixtures" '
-  ipfs dag import ../t0114-gateway-subdomains/fixtures.car &&
+  ipfs dag import --pin-roots ../t0114-gateway-subdomains/fixtures.car &&
   ipfs routing put --allow-offline /ipns/${RSA_KEY} ../t0114-gateway-subdomains/${RSA_KEY}.ipns-record &&
   ipfs routing put --allow-offline /ipns/${ED25519_KEY} ../t0114-gateway-subdomains/${ED25519_KEY}.ipns-record
 '

test/sharness/t0114-gateway-subdomains.sh

@@ -21,7 +21,7 @@ test_launch_ipfs_daemon_without_network
 # Import test case
 # See the static fixtures in ./t0115-gateway-dir-listing/
 test_expect_success "Add the test directory" '
-  ipfs dag import ../t0115-gateway-dir-listing/fixtures.car
+  ipfs dag import --pin-roots ../t0115-gateway-dir-listing/fixtures.car
 '
 DIR_CID=bafybeig6ka5mlwkl4subqhaiatalkcleo4jgnr3hqwvpmsqfca27cijp3i # ./rootDir/
 FILE_CID=bafkreialihlqnf5uwo4byh4n3cmwlntwqzxxs2fg5vanqdi3d7tb2l5xkm # ./rootDir/ą/ę/file-źł.txt

test/sharness/t0115-gateway-dir-listing.sh

@@ -35,7 +35,7 @@ TEST_IPNS_ID=k51qzi5uqu5dlxdsdu5fpuu7h69wu4ohp32iwm9pdt9nq3y5rpn3ln9j12zfhe
 # Import test case
 # See the static fixtures in ./t0116-gateway-cache/
 test_expect_success "Add the test directory" '
-  ipfs dag import ../t0116-gateway-cache/fixtures.car
+  ipfs dag import --pin-roots ../t0116-gateway-cache/fixtures.car
   ipfs routing put --allow-offline /ipns/${TEST_IPNS_ID} ../t0116-gateway-cache/${TEST_IPNS_ID}.ipns-record
 '