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author | Brandon Williams <bmwill@google.com> | 2018-06-27 15:30:17 -0700 |
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committer | Junio C Hamano <gitster@pobox.com> | 2018-06-28 09:33:29 -0700 |
commit | 516e2b76bdcf53e757309481fa0e663217ee8039 (patch) | |
tree | ae0e5dd4f8885a87ca8da1ecc740e34023ddd429 /t | |
parent | test-pkt-line: add unpack-sideband subcommand (diff) | |
download | tgif-516e2b76bdcf53e757309481fa0e663217ee8039.tar.xz |
upload-pack: implement ref-in-want
Currently, while performing packfile negotiation, clients are only
allowed to specify their desired objects using object ids. This causes
a vulnerability to failure when an object turns non-existent during
negotiation, which may happen if, for example, the desired repository is
provided by multiple Git servers in a load-balancing arrangement and
there exists replication delay.
In order to eliminate this vulnerability, implement the ref-in-want
feature for the 'fetch' command in protocol version 2. This feature
enables the 'fetch' command to support requests in the form of ref names
through a new "want-ref <ref>" parameter. At the conclusion of
negotiation, the server will send a list of all of the wanted references
(as provided by "want-ref" lines) in addition to the generated packfile.
Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 't')
-rwxr-xr-x | t/t5703-upload-pack-ref-in-want.sh | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/t/t5703-upload-pack-ref-in-want.sh b/t/t5703-upload-pack-ref-in-want.sh new file mode 100755 index 0000000000..da86f7cde0 --- /dev/null +++ b/t/t5703-upload-pack-ref-in-want.sh @@ -0,0 +1,160 @@ +#!/bin/sh + +test_description='upload-pack ref-in-want' + +. ./test-lib.sh + +get_actual_refs () { + sed -n -e '/wanted-refs/,/0001/{ + /wanted-refs/d + /0001/d + p + }' <out | test-pkt-line unpack >actual_refs +} + +get_actual_commits () { + sed -n -e '/packfile/,/0000/{ + /packfile/d + p + }' <out | test-pkt-line unpack-sideband >o.pack && + git index-pack o.pack && + git verify-pack -v o.idx | grep commit | cut -c-40 | sort >actual_commits +} + +check_output () { + get_actual_refs && + test_cmp expected_refs actual_refs && + get_actual_commits && + test_cmp expected_commits actual_commits +} + +# c(o/foo) d(o/bar) +# \ / +# b e(baz) f(master) +# \__ | __/ +# \ | / +# a +test_expect_success 'setup repository' ' + test_commit a && + git checkout -b o/foo && + test_commit b && + test_commit c && + git checkout -b o/bar b && + test_commit d && + git checkout -b baz a && + test_commit e && + git checkout master && + test_commit f +' + +test_expect_success 'config controls ref-in-want advertisement' ' + git serve --advertise-capabilities >out && + ! grep -a ref-in-want out && + + git config uploadpack.allowRefInWant false && + git serve --advertise-capabilities >out && + ! grep -a ref-in-want out && + + git config uploadpack.allowRefInWant true && + git serve --advertise-capabilities >out && + grep -a ref-in-want out +' + +test_expect_success 'invalid want-ref line' ' + test-pkt-line pack >in <<-EOF && + command=fetch + 0001 + no-progress + want-ref refs/heads/non-existent + done + 0000 + EOF + + test_must_fail git serve --stateless-rpc 2>out <in && + grep "unknown ref" out +' + +test_expect_success 'basic want-ref' ' + cat >expected_refs <<-EOF && + $(git rev-parse f) refs/heads/master + EOF + git rev-parse f | sort >expected_commits && + + test-pkt-line pack >in <<-EOF && + command=fetch + 0001 + no-progress + want-ref refs/heads/master + have $(git rev-parse a) + done + 0000 + EOF + + git serve --stateless-rpc >out <in && + check_output +' + +test_expect_success 'multiple want-ref lines' ' + cat >expected_refs <<-EOF && + $(git rev-parse c) refs/heads/o/foo + $(git rev-parse d) refs/heads/o/bar + EOF + git rev-parse c d | sort >expected_commits && + + test-pkt-line pack >in <<-EOF && + command=fetch + 0001 + no-progress + want-ref refs/heads/o/foo + want-ref refs/heads/o/bar + have $(git rev-parse b) + done + 0000 + EOF + + git serve --stateless-rpc >out <in && + check_output +' + +test_expect_success 'mix want and want-ref' ' + cat >expected_refs <<-EOF && + $(git rev-parse f) refs/heads/master + EOF + git rev-parse e f | sort >expected_commits && + + test-pkt-line pack >in <<-EOF && + command=fetch + 0001 + no-progress + want-ref refs/heads/master + want $(git rev-parse e) + have $(git rev-parse a) + done + 0000 + EOF + + git serve --stateless-rpc >out <in && + check_output +' + +test_expect_success 'want-ref with ref we already have commit for' ' + cat >expected_refs <<-EOF && + $(git rev-parse c) refs/heads/o/foo + EOF + >expected_commits && + + test-pkt-line pack >in <<-EOF && + command=fetch + 0001 + no-progress + want-ref refs/heads/o/foo + have $(git rev-parse c) + done + 0000 + EOF + + git serve --stateless-rpc >out <in && + check_output +' + +test_done |