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introduce gotd(8), a Git repository server reachable via ssh(1) This is an initial barebones implementation which provides the absolute minimum of functionality required to serve got(1) and git(1) clients. Basic fetch/send functionality has been tested and seems to work here, but this server is not yet expected to be stable. More testing is welcome. See the man pages for setup instructions. The current design uses one reader and one writer process per repository, which will have to be extended to N readers and N writers in the future. At startup, each process will chroot(2) into its assigned repository. This works because gotd(8) can only be started as root, and will then fork+exec, chroot, and privdrop. At present the parent process runs with the following pledge(2) promises: "stdio rpath wpath cpath proc getpw sendfd recvfd fattr flock unix unveil" The parent is the only process able to modify the repository in a way that becomes visible to Git clients. The parent uses unveil(2) to restrict its view of the filesystem to /tmp and the repositories listed in the configuration file gotd.conf(5). Per-repository chroot(2) processes use "stdio rpath sendfd recvfd". The writer defers to the parent for modifying references in the repository to point at newly uploaded commits. The reader is fine without such help, because Git repositories can be read without having to create any lock-files. gotd(8) requires a dedicated user ID, which should own repositories on the filesystem, and a separate secondary group, which should not have filesystem-level repository access, and must be allowed access to the gotd(8) socket. To obtain Git repository access, users must be members of this secondary group, and must have their login shell set to gotsh(1). gotsh(1) connects to the gotd(8) socket and speaks Git-protocol towards the client on the other end of the SSH connection. gotsh(1) is not an interactive command shell. At present, authenticated clients are granted read/write access to all repositories and all references (except for the "refs/got/" and the "refs/remotes/" namespaces, which are already being protected from modification). While complicated access control mechanism are not a design goal, making it possible to safely offer anonymous Git repository access over ssh(1) is on the road map.
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  1 3efd8e31 2022-10-23 thomas /*

  2 3efd8e31 2022-10-23 thomas  * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>

  3 3efd8e31 2022-10-23 thomas  *

  4 3efd8e31 2022-10-23 thomas  * Permission to use, copy, modify, and distribute this software for any

  5 3efd8e31 2022-10-23 thomas  * purpose with or without fee is hereby granted, provided that the above

  6 3efd8e31 2022-10-23 thomas  * copyright notice and this permission notice appear in all copies.

  7 3efd8e31 2022-10-23 thomas  *

  8 3efd8e31 2022-10-23 thomas  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

  9 3efd8e31 2022-10-23 thomas  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

 10 3efd8e31 2022-10-23 thomas  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

 11 3efd8e31 2022-10-23 thomas  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

 12 3efd8e31 2022-10-23 thomas  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

 13 3efd8e31 2022-10-23 thomas  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

 14 3efd8e31 2022-10-23 thomas  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 15 3efd8e31 2022-10-23 thomas  */

 16 3efd8e31 2022-10-23 thomas 

 17 3efd8e31 2022-10-23 thomas 

 18 3efd8e31 2022-10-23 thomas #define GOTD_UNIX_SOCKET "/var/run/gotd.sock"

 19 3efd8e31 2022-10-23 thomas #define GOTD_UNIX_SOCKET_BACKLOG 10

 20 3efd8e31 2022-10-23 thomas #define GOTD_UNIX_GROUP	"_gotsh"

 21 3efd8e31 2022-10-23 thomas #define GOTD_USER	"_gotd"

 22 3efd8e31 2022-10-23 thomas #define GOTD_CONF_PATH	"/etc/gotd.conf"

 23 3efd8e31 2022-10-23 thomas 

 24 3efd8e31 2022-10-23 thomas #define GOTD_MAXCLIENTS		1024

 25 3efd8e31 2022-10-23 thomas #define GOTD_FD_RESERVE		5

 26 3efd8e31 2022-10-23 thomas #define GOTD_FD_NEEDED		6

 27 3efd8e31 2022-10-23 thomas #define GOTD_SOCK_FILENO	3

 28 3efd8e31 2022-10-23 thomas 

 29 3efd8e31 2022-10-23 thomas /* Client hash tables need some extra room. */

 30 3efd8e31 2022-10-23 thomas #define GOTD_CLIENT_TABLE_SIZE (GOTD_MAXCLIENTS * 4)

 31 3efd8e31 2022-10-23 thomas 

 32 3efd8e31 2022-10-23 thomas enum gotd_procid {

 33 3efd8e31 2022-10-23 thomas 	PROC_GOTD	= 0,

 34 3efd8e31 2022-10-23 thomas 	PROC_REPO_READ,

 35 3efd8e31 2022-10-23 thomas 	PROC_REPO_WRITE,

 36 3efd8e31 2022-10-23 thomas 	PROC_MAX,

 37 3efd8e31 2022-10-23 thomas };

 38 3efd8e31 2022-10-23 thomas 

 39 3efd8e31 2022-10-23 thomas struct gotd_imsgev {

 40 3efd8e31 2022-10-23 thomas 	struct imsgbuf	 ibuf;

 41 3efd8e31 2022-10-23 thomas 	void		(*handler)(int, short, void *);

 42 3efd8e31 2022-10-23 thomas 	void		*handler_arg;

 43 3efd8e31 2022-10-23 thomas 	struct event	 ev;

 44 3efd8e31 2022-10-23 thomas 	short		 events;

 45 3efd8e31 2022-10-23 thomas };

 46 3efd8e31 2022-10-23 thomas 

 47 3efd8e31 2022-10-23 thomas struct gotd_child_proc {

 48 3efd8e31 2022-10-23 thomas 	pid_t pid;

 49 3efd8e31 2022-10-23 thomas 	enum gotd_procid type;

 50 3efd8e31 2022-10-23 thomas 	char repo_name[NAME_MAX];

 51 3efd8e31 2022-10-23 thomas 	char chroot_path[PATH_MAX];

 52 3efd8e31 2022-10-23 thomas 	int pipe[2];

 53 3efd8e31 2022-10-23 thomas 	struct gotd_imsgev iev;

 54 3efd8e31 2022-10-23 thomas 	size_t nhelpers;

 55 3efd8e31 2022-10-23 thomas };

 56 3efd8e31 2022-10-23 thomas 

 57 3efd8e31 2022-10-23 thomas struct gotd_repo {

 58 3efd8e31 2022-10-23 thomas 	TAILQ_ENTRY(gotd_repo)	 entry;

 59 3efd8e31 2022-10-23 thomas 

 60 3efd8e31 2022-10-23 thomas 	char name[NAME_MAX];

 61 3efd8e31 2022-10-23 thomas 	char path[PATH_MAX];

 62 3efd8e31 2022-10-23 thomas };

 63 3efd8e31 2022-10-23 thomas TAILQ_HEAD(gotd_repolist, gotd_repo);

 64 3efd8e31 2022-10-23 thomas 

 65 3efd8e31 2022-10-23 thomas enum gotd_client_state {

 66 3efd8e31 2022-10-23 thomas 	GOTD_STATE_EXPECT_LIST_REFS,

 67 3efd8e31 2022-10-23 thomas 	GOTD_STATE_EXPECT_CAPABILITIES,

 68 3efd8e31 2022-10-23 thomas 	GOTD_STATE_EXPECT_WANT,

 69 3efd8e31 2022-10-23 thomas 	GOTD_STATE_EXPECT_REF_UPDATE,

 70 3efd8e31 2022-10-23 thomas 	GOTD_STATE_EXPECT_MORE_REF_UPDATES,

 71 3efd8e31 2022-10-23 thomas 	GOTD_STATE_EXPECT_HAVE,

 72 3efd8e31 2022-10-23 thomas 	GOTD_STATE_EXPECT_PACKFILE,

 73 3efd8e31 2022-10-23 thomas 	GOTD_STATE_EXPECT_DONE,

 74 3efd8e31 2022-10-23 thomas 	GOTD_STATE_DONE,

 75 3efd8e31 2022-10-23 thomas };

 76 3efd8e31 2022-10-23 thomas 

 77 3efd8e31 2022-10-23 thomas struct gotd_client_capability {

 78 3efd8e31 2022-10-23 thomas 	char *key;

 79 3efd8e31 2022-10-23 thomas 	char *value;

 80 3efd8e31 2022-10-23 thomas };

 81 3efd8e31 2022-10-23 thomas 

 82 3efd8e31 2022-10-23 thomas struct gotd_object_id_array {

 83 3efd8e31 2022-10-23 thomas 	struct got_object_id		**ids;

 84 3efd8e31 2022-10-23 thomas 	size_t				 nalloc;

 85 3efd8e31 2022-10-23 thomas 	size_t				 nids;

 86 3efd8e31 2022-10-23 thomas };

 87 3efd8e31 2022-10-23 thomas 

 88 3efd8e31 2022-10-23 thomas struct gotd {

 89 3efd8e31 2022-10-23 thomas 	pid_t pid;

 90 3efd8e31 2022-10-23 thomas 	char unix_socket_path[PATH_MAX];

 91 3efd8e31 2022-10-23 thomas 	char unix_group_name[32];

 92 3efd8e31 2022-10-23 thomas 	char user_name[32];

 93 3efd8e31 2022-10-23 thomas 	struct gotd_repolist repos;

 94 3efd8e31 2022-10-23 thomas 	int nrepos;

 95 3efd8e31 2022-10-23 thomas 	int verbosity;

 96 3efd8e31 2022-10-23 thomas 	struct event ev;

 97 3efd8e31 2022-10-23 thomas 	struct event pause;

 98 3efd8e31 2022-10-23 thomas 	struct gotd_child_proc *procs;

 99 3efd8e31 2022-10-23 thomas 	int nprocs;

100 3efd8e31 2022-10-23 thomas };

101 3efd8e31 2022-10-23 thomas 

102 3efd8e31 2022-10-23 thomas enum gotd_imsg_type {

103 3efd8e31 2022-10-23 thomas 	/* An error occured while processing a request. */

104 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_ERROR,

105 3efd8e31 2022-10-23 thomas 

106 3efd8e31 2022-10-23 thomas 	/* Request a list of references. */

107 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_LIST_REFS,

108 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_LIST_REFS_INTERNAL,

109 3efd8e31 2022-10-23 thomas 

110 3efd8e31 2022-10-23 thomas 	/* References. */

111 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_REFLIST,

112 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_REF,

113 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_SYMREF,

114 3efd8e31 2022-10-23 thomas 

115 3efd8e31 2022-10-23 thomas 	/* Git protocol capabilities. */

116 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_CAPABILITIES,

117 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_CAPABILITY,

118 3efd8e31 2022-10-23 thomas 

119 3efd8e31 2022-10-23 thomas 	/* Git protocol chatter. */

120 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_WANT,		/* The client wants an object. */

121 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_HAVE,		/* The client has an object. */

122 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_ACK,		/* The server has an object or a reference. */

123 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_NAK,		/* The server does not have an object/ref. */

124 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_REF_UPDATE,	/* The client wants to update a reference. */

125 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_REF_DELETE,	/* The client wants to delete a reference. */

126 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_FLUSH,	/* The client sent a flush packet. */

127 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_DONE,		/* The client is done chatting. */

128 3efd8e31 2022-10-23 thomas 

129 3efd8e31 2022-10-23 thomas 	/* Sending or receiving a pack file. */

130 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_SEND_PACKFILE, /* The server is sending a pack file. */

131 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_RECV_PACKFILE, /* The server is receiving a pack file. */

132 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_PACKIDX_FILE,  /* Temporary file handle for new pack index. */

133 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_PACKFILE_PIPE, /* Pipe to send/receive a pack file stream. */

134 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_PACKFILE_PROGRESS, /* Progress reporting. */

135 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_PACKFILE_READY, /* Pack file is ready to be sent. */

136 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_PACKFILE_STATUS, /* Received pack success/failure status. */

137 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_PACKFILE_INSTALL, /* Received pack file can be installed. */

138 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_PACKFILE_DONE, /* Pack file has been sent/received. */

139 3efd8e31 2022-10-23 thomas 

140 3efd8e31 2022-10-23 thomas 	/* Reference updates. */

141 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_REF_UPDATES_START, /* Ref updates starting. */

142 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_REF_UPDATE_OK, /* Update went OK. */

143 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_REF_UPDATE_NG, /* Update was not good. */

144 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_REFS_UPDATED, /* The server proccessed all ref updates. */

145 3efd8e31 2022-10-23 thomas 

146 3efd8e31 2022-10-23 thomas 	/* Client is disconnecting. */

147 3efd8e31 2022-10-23 thomas 	GOTD_IMSG_DISCONNECT,

148 3efd8e31 2022-10-23 thomas };

149 3efd8e31 2022-10-23 thomas 

150 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_ERROR. */

151 3efd8e31 2022-10-23 thomas struct gotd_imsg_error {

152 3efd8e31 2022-10-23 thomas 	int code; /* an error code from got_error.h */

153 3efd8e31 2022-10-23 thomas 	int errno_code; /* in case code equals GOT_ERR_ERRNO */

154 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

155 3efd8e31 2022-10-23 thomas 	char msg[GOT_ERR_MAX_MSG_SIZE];

156 3efd8e31 2022-10-23 thomas } __attribute__((__packed__));

157 3efd8e31 2022-10-23 thomas 

158 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_LIST_REFS. */

159 3efd8e31 2022-10-23 thomas struct gotd_imsg_list_refs {

160 3efd8e31 2022-10-23 thomas 	char repo_name[NAME_MAX];

161 3efd8e31 2022-10-23 thomas 	int client_is_reading; /* 1 if reading, 0 if writing */

162 3efd8e31 2022-10-23 thomas };

163 3efd8e31 2022-10-23 thomas 

164 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_LIST_REFS_INTERNAL. */

165 3efd8e31 2022-10-23 thomas struct gotd_imsg_list_refs_internal {

166 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

167 3efd8e31 2022-10-23 thomas };

168 3efd8e31 2022-10-23 thomas 

169 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_REFLIST. */

170 3efd8e31 2022-10-23 thomas struct gotd_imsg_reflist {

171 3efd8e31 2022-10-23 thomas 	size_t nrefs;

172 3efd8e31 2022-10-23 thomas 

173 3efd8e31 2022-10-23 thomas 	/* Followed by nrefs times of gotd_imsg_ref/gotd_imsg_symref data. */

174 3efd8e31 2022-10-23 thomas } __attribute__((__packed__));

175 3efd8e31 2022-10-23 thomas 

176 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_REF data. */

177 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref {

178 3efd8e31 2022-10-23 thomas 	uint8_t id[SHA1_DIGEST_LENGTH];

179 3efd8e31 2022-10-23 thomas 	size_t name_len;

180 3efd8e31 2022-10-23 thomas 	/* Followed by name_len data bytes. */

181 3efd8e31 2022-10-23 thomas } __attribute__((__packed__));

182 3efd8e31 2022-10-23 thomas 

183 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_SYMREF data. */

184 3efd8e31 2022-10-23 thomas struct gotd_imsg_symref {

185 3efd8e31 2022-10-23 thomas 	size_t name_len;

186 3efd8e31 2022-10-23 thomas 	size_t target_len;

187 3efd8e31 2022-10-23 thomas 	uint8_t target_id[SHA1_DIGEST_LENGTH];

188 3efd8e31 2022-10-23 thomas 

189 3efd8e31 2022-10-23 thomas 	/*

190 3efd8e31 2022-10-23 thomas 	 * Followed by name_len + target_len data bytes.

191 3efd8e31 2022-10-23 thomas 	 */

192 3efd8e31 2022-10-23 thomas } __attribute__((__packed__));

193 3efd8e31 2022-10-23 thomas 

194 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_CAPABILITIES data. */

195 3efd8e31 2022-10-23 thomas struct gotd_imsg_capabilities {

196 3efd8e31 2022-10-23 thomas 	size_t ncapabilities;

197 3efd8e31 2022-10-23 thomas 

198 3efd8e31 2022-10-23 thomas 	/*

199 3efd8e31 2022-10-23 thomas 	 * Followed by ncapabilities * GOTD_IMSG_CAPABILITY.

200 3efd8e31 2022-10-23 thomas 	 */

201 3efd8e31 2022-10-23 thomas } __attribute__((__packed__));

202 3efd8e31 2022-10-23 thomas 

203 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_CAPABILITY data. */

204 3efd8e31 2022-10-23 thomas struct gotd_imsg_capability {

205 3efd8e31 2022-10-23 thomas 	size_t key_len;

206 3efd8e31 2022-10-23 thomas 	size_t value_len;

207 3efd8e31 2022-10-23 thomas 

208 3efd8e31 2022-10-23 thomas 	/*

209 3efd8e31 2022-10-23 thomas 	 * Followed by key_len + value_len data bytes.

210 3efd8e31 2022-10-23 thomas 	 */

211 3efd8e31 2022-10-23 thomas } __attribute__((__packed__));

212 3efd8e31 2022-10-23 thomas 

213 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_WANT data. */

214 3efd8e31 2022-10-23 thomas struct gotd_imsg_want {

215 3efd8e31 2022-10-23 thomas 	uint8_t object_id[SHA1_DIGEST_LENGTH];

216 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

217 3efd8e31 2022-10-23 thomas } __attribute__((__packed__));

218 3efd8e31 2022-10-23 thomas 

219 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_HAVE data. */

220 3efd8e31 2022-10-23 thomas struct gotd_imsg_have {

221 3efd8e31 2022-10-23 thomas 	uint8_t object_id[SHA1_DIGEST_LENGTH];

222 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

223 3efd8e31 2022-10-23 thomas } __attribute__((__packed__));

224 3efd8e31 2022-10-23 thomas 

225 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_ACK data. */

226 3efd8e31 2022-10-23 thomas struct gotd_imsg_ack {

227 3efd8e31 2022-10-23 thomas 	uint8_t object_id[SHA1_DIGEST_LENGTH];

228 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

229 3efd8e31 2022-10-23 thomas } __attribute__((__packed__));

230 3efd8e31 2022-10-23 thomas 

231 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_NAK data. */

232 3efd8e31 2022-10-23 thomas struct gotd_imsg_nak {

233 3efd8e31 2022-10-23 thomas 	uint8_t object_id[SHA1_DIGEST_LENGTH];

234 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

235 3efd8e31 2022-10-23 thomas } __attribute__((__packed__));

236 3efd8e31 2022-10-23 thomas 

237 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_PACKFILE_STATUS data. */

238 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_status {

239 3efd8e31 2022-10-23 thomas 	size_t reason_len;

240 3efd8e31 2022-10-23 thomas 

241 3efd8e31 2022-10-23 thomas 	/* Followed by reason_len data bytes. */

242 3efd8e31 2022-10-23 thomas } __attribute__((__packed__));

243 3efd8e31 2022-10-23 thomas 

244 3efd8e31 2022-10-23 thomas 

245 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_REF_UPDATE data. */

246 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update {

247 3efd8e31 2022-10-23 thomas 	uint8_t old_id[SHA1_DIGEST_LENGTH];

248 3efd8e31 2022-10-23 thomas 	uint8_t new_id[SHA1_DIGEST_LENGTH];

249 3efd8e31 2022-10-23 thomas 	int ref_is_new;

250 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

251 3efd8e31 2022-10-23 thomas 	size_t name_len;

252 3efd8e31 2022-10-23 thomas 

253 3efd8e31 2022-10-23 thomas 	/* Followed by name_len data bytes. */

254 3efd8e31 2022-10-23 thomas } __attribute__((__packed__));

255 3efd8e31 2022-10-23 thomas 

256 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_REF_UPDATES_START data. */

257 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_updates_start {

258 3efd8e31 2022-10-23 thomas 	int nref_updates;

259 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

260 3efd8e31 2022-10-23 thomas 

261 3efd8e31 2022-10-23 thomas 	/* Followed by nref_updates GOT_IMSG_REF_UPDATE_OK/NG messages. */

262 3efd8e31 2022-10-23 thomas };

263 3efd8e31 2022-10-23 thomas 

264 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_REF_UPDATE_OK data. */

265 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update_ok {

266 3efd8e31 2022-10-23 thomas 	uint8_t old_id[SHA1_DIGEST_LENGTH];

267 3efd8e31 2022-10-23 thomas 	uint8_t new_id[SHA1_DIGEST_LENGTH];

268 3efd8e31 2022-10-23 thomas 	int ref_is_new;

269 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

270 3efd8e31 2022-10-23 thomas 	size_t name_len;

271 3efd8e31 2022-10-23 thomas 

272 3efd8e31 2022-10-23 thomas 	/* Followed by name_len data bytes. */

273 3efd8e31 2022-10-23 thomas } __attribute__((__packed__));

274 3efd8e31 2022-10-23 thomas 

275 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_REF_UPDATE_NG data. */

276 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update_ng {

277 3efd8e31 2022-10-23 thomas 	uint8_t old_id[SHA1_DIGEST_LENGTH];

278 3efd8e31 2022-10-23 thomas 	uint8_t new_id[SHA1_DIGEST_LENGTH];

279 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

280 3efd8e31 2022-10-23 thomas 	size_t name_len;

281 3efd8e31 2022-10-23 thomas 	size_t reason_len;

282 3efd8e31 2022-10-23 thomas 

283 3efd8e31 2022-10-23 thomas 	/* Followed by name_len + reason_len data bytes. */

284 3efd8e31 2022-10-23 thomas } __attribute__((__packed__));

285 3efd8e31 2022-10-23 thomas 

286 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_SEND_PACKFILE data. */

287 3efd8e31 2022-10-23 thomas struct gotd_imsg_send_packfile {

288 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

289 3efd8e31 2022-10-23 thomas 	int report_progress;

290 3efd8e31 2022-10-23 thomas 

291 3efd8e31 2022-10-23 thomas 	/* delta cache file is sent as a file descriptor */

292 3efd8e31 2022-10-23 thomas 

293 3efd8e31 2022-10-23 thomas 	/* followed by two GOTD_IMSG_PACKFILE_PIPE messages */

294 3efd8e31 2022-10-23 thomas };

295 3efd8e31 2022-10-23 thomas 

296 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_RECV_PACKFILE data. */

297 3efd8e31 2022-10-23 thomas struct gotd_imsg_recv_packfile {

298 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

299 3efd8e31 2022-10-23 thomas 	int report_status;

300 3efd8e31 2022-10-23 thomas 

301 3efd8e31 2022-10-23 thomas 	/* pack destination temp file is sent as a file descriptor */

302 3efd8e31 2022-10-23 thomas };

303 3efd8e31 2022-10-23 thomas 

304 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_PACKFILE_PIPE data. */

305 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_pipe {

306 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

307 3efd8e31 2022-10-23 thomas };

308 3efd8e31 2022-10-23 thomas 

309 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_PACKIDX_FILE data. */

310 3efd8e31 2022-10-23 thomas struct gotd_imsg_packidx_file {

311 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

312 3efd8e31 2022-10-23 thomas };

313 3efd8e31 2022-10-23 thomas 

314 3efd8e31 2022-10-23 thomas 

315 3efd8e31 2022-10-23 thomas /*

316 3efd8e31 2022-10-23 thomas  * Structure for GOTD_IMSG_PACKFILE_PROGRESS and

317 3efd8e31 2022-10-23 thomas  * GOTD_IMSG_PACKFILE_READY data.

318 3efd8e31 2022-10-23 thomas  */

319 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_progress {

320 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

321 3efd8e31 2022-10-23 thomas 	int ncolored;

322 3efd8e31 2022-10-23 thomas 	int nfound;

323 3efd8e31 2022-10-23 thomas 	int ntrees;

324 3efd8e31 2022-10-23 thomas 	off_t packfile_size;

325 3efd8e31 2022-10-23 thomas 	int ncommits;

326 3efd8e31 2022-10-23 thomas 	int nobj_total;

327 3efd8e31 2022-10-23 thomas 	int nobj_deltify;

328 3efd8e31 2022-10-23 thomas 	int nobj_written;

329 3efd8e31 2022-10-23 thomas };

330 3efd8e31 2022-10-23 thomas 

331 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_PACKFILE_INSTALL. */

332 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_install {

333 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

334 3efd8e31 2022-10-23 thomas 	uint8_t pack_sha1[SHA1_DIGEST_LENGTH];

335 3efd8e31 2022-10-23 thomas };

336 3efd8e31 2022-10-23 thomas 

337 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_PACKFILE_DONE data. */

338 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_done {

339 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

340 3efd8e31 2022-10-23 thomas };

341 3efd8e31 2022-10-23 thomas 

342 3efd8e31 2022-10-23 thomas /* Structure for GOTD_IMSG_DISCONNECT data. */

343 3efd8e31 2022-10-23 thomas struct gotd_imsg_disconnect {

344 3efd8e31 2022-10-23 thomas 	uint32_t client_id;

345 3efd8e31 2022-10-23 thomas };

346 3efd8e31 2022-10-23 thomas 

347 3efd8e31 2022-10-23 thomas int parse_config(const char *, enum gotd_procid, struct gotd *);

348 3efd8e31 2022-10-23 thomas 

349 3efd8e31 2022-10-23 thomas /* imsg.c */

350 3efd8e31 2022-10-23 thomas const struct got_error *gotd_imsg_flush(struct imsgbuf *);

351 3efd8e31 2022-10-23 thomas const struct got_error *gotd_imsg_recv(struct imsg *, struct imsgbuf *, size_t);

352 3efd8e31 2022-10-23 thomas const struct got_error *gotd_imsg_poll_recv(struct imsg *, struct imsgbuf *,

353 3efd8e31 2022-10-23 thomas     size_t);

354 3efd8e31 2022-10-23 thomas const struct got_error *gotd_imsg_recv_error(uint32_t *client_id,

355 3efd8e31 2022-10-23 thomas     struct imsg *imsg);

356 3efd8e31 2022-10-23 thomas int gotd_imsg_send_error(struct imsgbuf *ibuf, uint32_t, uint32_t,

357 3efd8e31 2022-10-23 thomas     const struct got_error *);

358 3efd8e31 2022-10-23 thomas int gotd_imsg_send_error_event(struct gotd_imsgev *, uint32_t, uint32_t,

359 3efd8e31 2022-10-23 thomas     const struct got_error *);

360 3efd8e31 2022-10-23 thomas void gotd_imsg_event_add(struct gotd_imsgev *);

361 3efd8e31 2022-10-23 thomas int gotd_imsg_compose_event(struct gotd_imsgev *, uint16_t, uint32_t, int,

362 3efd8e31 2022-10-23 thomas     void *, uint16_t);

363 3efd8e31 2022-10-23 thomas int gotd_imsg_forward(struct gotd_imsgev *, struct imsg *, int);

364 3efd8e31 2022-10-23 thomas 

365 3efd8e31 2022-10-23 thomas void gotd_imsg_send_ack(struct got_object_id *, struct imsgbuf *,

366 3efd8e31 2022-10-23 thomas     uint32_t, pid_t);

367 3efd8e31 2022-10-23 thomas void gotd_imsg_send_nak(struct got_object_id *, struct imsgbuf *,

368 3efd8e31 2022-10-23 thomas     uint32_t, pid_t);