From patchwork Fri Nov 8 16:24:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Ju X-Patchwork-Id: 13868471 Received: from mail-qt1-f181.google.com (mail-qt1-f181.google.com [209.85.160.181]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B5F4A1885A4 for ; Fri, 8 Nov 2024 16:25:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.181 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731083103; cv=none; b=mLClUzDUoFwWyjugeza9DpTM09MB05WI7k7d6qoweE6ni+qTLoWPuF9JT98XvjJ9aTXa/jspgG/5ZvZOLEWoZs68G66e2tlo19QXV84+x8TMVyBMRjTw3NVNvxozypXKMDgQBH8VbR5NxwJgvjDP53vlqiCql8CuPbHLqsB59KA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731083103; c=relaxed/simple; bh=jshCky/zlmpsFNJ1TXtVnx/54IQwxCxfxWKlIX92FhY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=e3/yzWaVUjTgh3xokpcc/gUWExLxOwTSQ6+8ylUL3QrJCm3ACfp+Pn5jl59brOhFfk5NAgqRncqBt+8NwjZMSrn3pTr47D5LvpHwelXkv41Qa7ylDBKj3Twh9+V2JXneuL9znxLdMQ7KJB+xg41/v0g4Jcm40AgHZuBcAmM5NFA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=dtj17B0I; arc=none smtp.client-ip=209.85.160.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="dtj17B0I" Received: by mail-qt1-f181.google.com with SMTP id d75a77b69052e-460c316fc37so14307751cf.0 for ; Fri, 08 Nov 2024 08:25:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1731083100; x=1731687900; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=z7MVXs0gxtCtxujZsstp9c+aL+ldmxTsu5jXCqlAKKI=; b=dtj17B0IwiiBGSO//oRPNzV8D7cjYaU37AWDwv1RVKTK62iU+TOt6gr/rHWccZkQSc bimqZAB+Z4v1oqM4HWiRI77ptrIfnsPzOORVRlvziSSG8LUH5jDBFTqNfUri5YYKDrQK y4P7nG+byz8UZnmsN75Vzls8lsXu1chG2peX5INqA58MLEhPTyaHdCLMK5V06k2u/cIQ U2zL41OdHbkJd3oxbqpbtuTlpBSVV24chZ04pMgk7iVlxDApdKYU4yZ+5Ihe+uqV9sdh 9lVUnXxlqQaAjKGDsLVS95yD6Aa+oC4ZQvfzE2/tJgdsWbZ0Flcfsd67L7MbtXj+Pojt O2Pw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1731083100; x=1731687900; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=z7MVXs0gxtCtxujZsstp9c+aL+ldmxTsu5jXCqlAKKI=; b=c8R3QzioLU2TpamEZ9dd2eUQriSao7GeBI4omNaBKq1FtpMgG6PzO1eabXr3sUCIEo owoWYlgF6IL8a6CofCveni+yfar8wBe60EvyqT07ce+iplvecCDAJNjM1usdIifKdRxP VVMK4hQ8QGgS9HCCn/c/4RgxZ1714AuoUrGnJdMgAv+t32Jxqd1eImSaYlPuuHRz0dfc AtbpypxcOSCPQjsbYlzE/8AQ1cR9hFoKF5gkr6ITNZ55Dq17Sv2mUs9lUuIW+w3AmfVJ Ky3r7iDSCS3dZnPODk0QYVze+zI6X4SbsAZlUBOnT5ZY14dh58RIilim1EnzV9PWp46D cpzg== X-Gm-Message-State: AOJu0YxJPkOdJ/BI61J86JWLJLgWBUrphD5kUHw3B2zvNac2RPadm8d9 7xRjeStxgbh1c+mOFoU+M881kiWnKUgauio6tc7ED5/xuE/97RhGiFjilVk+ X-Google-Smtp-Source: AGHT+IGQ2xhnOY51WU+4PMAjRrYBRz5/Irya2jWZRPof8yg+/pWaEgvu0dUjSXadrMREQ/Qx4DXlHQ== X-Received: by 2002:ac8:7fca:0:b0:45d:7ebd:76e0 with SMTP id d75a77b69052e-463093fe069mr34320121cf.44.1731083100293; Fri, 08 Nov 2024 08:25:00 -0800 (PST) Received: from localhost.localdomain ([174.95.142.183]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-462ff3ef11esm21928711cf.15.2024.11.08.08.24.59 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Fri, 08 Nov 2024 08:24:59 -0800 (PST) From: Eric Ju To: git@vger.kernel.org Cc: calvinwan@google.com, jonathantanmy@google.com, chriscool@tuxfamily.org, eric.peijian@gmail.com, karthik.188@gmail.com, toon@iotcl.com, jltobler@gmail.com Subject: [PATCH v6 2/6] fetch-pack: refactor packet writing Date: Fri, 8 Nov 2024 11:24:37 -0500 Message-ID: <20241108162441.50736-3-eric.peijian@gmail.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241108162441.50736-1-eric.peijian@gmail.com> References: <20240628190503.67389-1-eric.peijian@gmail.com> <20241108162441.50736-1-eric.peijian@gmail.com> Precedence: bulk X-Mailing-List: git@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Calvin Wan Refactor write_fetch_command_and_capabilities() to a more general-purpose function, write_command_and_capabilities(), enabling it to serve both fetch and additional commands. In this context, "command" refers to the "operations" supported by Git's wire protocol https://git-scm.com/docs/protocol-v2, such as a Git subcommand (e.g., git-fetch(1)) or a server-side operation like "object-info" as implemented in commit a2ba162c (object-info: support for retrieving object info, 2021-04-20). Furthermore, write_command_and_capabilities() is moved to connect.c, making it accessible to additional commands in the future. To move write_command_and_capabilities() to connect.c, we need to adjust how `advertise_sid` is managed. Previously, in fetch_pack.c, `advertise_sid` was a static variable, modified using git_config_get_bool(). In connect.c, we now initialize `advertise_sid` at the beginning by directly using git_config_get_bool(). This change is safe because: In the original fetch-pack.c code, there are only two places that write `advertise_sid` : 1. In function do_fetch_pack: if (!server_supports("session-id")) advertise_sid = 0; 2. In function fetch_pack_config(): git_config_get_bool("transfer.advertisesid", &advertise_sid); About 1, since do_fetch_pack() is only relevant for protocol v1, this assignment can be ignored in our refactor, as write_command_and_capabilities() is only used in protocol v2. About 2, git_config_get_bool() is from config.h and it is an out-of-box dependency of connect.c, so we can reuse it directly. Helped-by: Jonathan Tan Helped-by: Christian Couder Signed-off-by: Calvin Wan Signed-off-by: Eric Ju --- connect.c | 34 ++++++++++++++++++++++++++++++++++ connect.h | 4 ++++ fetch-pack.c | 35 ++--------------------------------- 3 files changed, 40 insertions(+), 33 deletions(-) diff --git a/connect.c b/connect.c index 58f53d8dcb..5dd544335c 100644 --- a/connect.c +++ b/connect.c @@ -688,6 +688,40 @@ int server_supports(const char *feature) return !!server_feature_value(feature, NULL); } +void write_command_and_capabilities(struct strbuf *req_buf, const char *command, + const struct string_list *server_options) +{ + const char *hash_name; + int advertise_sid; + + git_config_get_bool("transfer.advertisesid", &advertise_sid); + + ensure_server_supports_v2(command); + packet_buf_write(req_buf, "command=%s", command); + if (server_supports_v2("agent")) + packet_buf_write(req_buf, "agent=%s", git_user_agent_sanitized()); + if (advertise_sid && server_supports_v2("session-id")) + packet_buf_write(req_buf, "session-id=%s", trace2_session_id()); + if (server_options && server_options->nr) { + ensure_server_supports_v2("server-option"); + for (int i = 0; i < server_options->nr; i++) + packet_buf_write(req_buf, "server-option=%s", + server_options->items[i].string); + } + + if (server_feature_v2("object-format", &hash_name)) { + const int hash_algo = hash_algo_by_name(hash_name); + if (hash_algo_by_ptr(the_hash_algo) != hash_algo) + die(_("mismatched algorithms: client %s; server %s"), + the_hash_algo->name, hash_name); + packet_buf_write(req_buf, "object-format=%s", the_hash_algo->name); + } else if (hash_algo_by_ptr(the_hash_algo) != GIT_HASH_SHA1) { + die(_("the server does not support algorithm '%s'"), + the_hash_algo->name); + } + packet_buf_delim(req_buf); +} + enum protocol { PROTO_LOCAL = 1, PROTO_FILE, diff --git a/connect.h b/connect.h index 1645126c17..04043cd66d 100644 --- a/connect.h +++ b/connect.h @@ -1,6 +1,7 @@ #ifndef CONNECT_H #define CONNECT_H +#include "string-list.h" #include "protocol.h" #define CONNECT_VERBOSE (1u << 0) @@ -30,4 +31,7 @@ void check_stateless_delimiter(int stateless_rpc, struct packet_reader *reader, const char *error); +void write_command_and_capabilities(struct strbuf *req_buf, const char *command, + const struct string_list *server_options); + #endif diff --git a/fetch-pack.c b/fetch-pack.c index 3699cf9945..533fb76f95 100644 --- a/fetch-pack.c +++ b/fetch-pack.c @@ -1314,37 +1314,6 @@ static int add_haves(struct fetch_negotiator *negotiator, return haves_added; } -static void write_fetch_command_and_capabilities(struct strbuf *req_buf, - const struct string_list *server_options) -{ - const char *hash_name; - - ensure_server_supports_v2("fetch"); - packet_buf_write(req_buf, "command=fetch"); - if (server_supports_v2("agent")) - packet_buf_write(req_buf, "agent=%s", git_user_agent_sanitized()); - if (advertise_sid && server_supports_v2("session-id")) - packet_buf_write(req_buf, "session-id=%s", trace2_session_id()); - if (server_options && server_options->nr) { - ensure_server_supports_v2("server-option"); - for (int i = 0; i < server_options->nr; i++) - packet_buf_write(req_buf, "server-option=%s", - server_options->items[i].string); - } - - if (server_feature_v2("object-format", &hash_name)) { - int hash_algo = hash_algo_by_name(hash_name); - if (hash_algo_by_ptr(the_hash_algo) != hash_algo) - die(_("mismatched algorithms: client %s; server %s"), - the_hash_algo->name, hash_name); - packet_buf_write(req_buf, "object-format=%s", the_hash_algo->name); - } else if (hash_algo_by_ptr(the_hash_algo) != GIT_HASH_SHA1) { - die(_("the server does not support algorithm '%s'"), - the_hash_algo->name); - } - packet_buf_delim(req_buf); -} - static int send_fetch_request(struct fetch_negotiator *negotiator, int fd_out, struct fetch_pack_args *args, const struct ref *wants, struct oidset *common, @@ -1355,7 +1324,7 @@ static int send_fetch_request(struct fetch_negotiator *negotiator, int fd_out, int done_sent = 0; struct strbuf req_buf = STRBUF_INIT; - write_fetch_command_and_capabilities(&req_buf, args->server_options); + write_command_and_capabilities(&req_buf, "fetch", args->server_options); if (args->use_thin_pack) packet_buf_write(&req_buf, "thin-pack"); @@ -2173,7 +2142,7 @@ void negotiate_using_fetch(const struct oid_array *negotiation_tips, the_repository, "%d", negotiation_round); strbuf_reset(&req_buf); - write_fetch_command_and_capabilities(&req_buf, server_options); + write_command_and_capabilities(&req_buf, "fetch", server_options); packet_buf_write(&req_buf, "wait-for-done");