1 ae7c1b78 2023-01-10 stsp /*
   2 ae7c1b78 2023-01-10 stsp  * Copyright (c) 2022, 2023 Stefan Sperling <stsp@openbsd.org>
   3 ae7c1b78 2023-01-10 stsp  *
   4 ae7c1b78 2023-01-10 stsp  * Permission to use, copy, modify, and distribute this software for any
   5 ae7c1b78 2023-01-10 stsp  * purpose with or without fee is hereby granted, provided that the above
   6 ae7c1b78 2023-01-10 stsp  * copyright notice and this permission notice appear in all copies.
   7 ae7c1b78 2023-01-10 stsp  *
   8 ae7c1b78 2023-01-10 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9 ae7c1b78 2023-01-10 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10 ae7c1b78 2023-01-10 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11 ae7c1b78 2023-01-10 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12 ae7c1b78 2023-01-10 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13 ae7c1b78 2023-01-10 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14 ae7c1b78 2023-01-10 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15 ae7c1b78 2023-01-10 stsp  */
  16 ae7c1b78 2023-01-10 stsp 
  17 ae7c1b78 2023-01-10 stsp #include <sys/types.h>
  18 ae7c1b78 2023-01-10 stsp #include <sys/queue.h>
  19 ae7c1b78 2023-01-10 stsp #include <sys/tree.h>
  20 ae7c1b78 2023-01-10 stsp #include <sys/socket.h>
  21 839bbaae 2023-02-01 op #include <sys/stat.h>
  22 ae7c1b78 2023-01-10 stsp #include <sys/uio.h>
  23 ae7c1b78 2023-01-10 stsp 
  24 ae7c1b78 2023-01-10 stsp #include <errno.h>
  25 ae7c1b78 2023-01-10 stsp #include <event.h>
  26 ae7c1b78 2023-01-10 stsp #include <limits.h>
  27 ae7c1b78 2023-01-10 stsp #include <sha1.h>
  28 5822e79e 2023-02-23 op #include <sha2.h>
  29 ae7c1b78 2023-01-10 stsp #include <signal.h>
  30 ae7c1b78 2023-01-10 stsp #include <stdint.h>
  31 ae7c1b78 2023-01-10 stsp #include <stdio.h>
  32 ae7c1b78 2023-01-10 stsp #include <stdlib.h>
  33 ae7c1b78 2023-01-10 stsp #include <string.h>
  34 ae7c1b78 2023-01-10 stsp #include <imsg.h>
  35 ae7c1b78 2023-01-10 stsp #include <unistd.h>
  36 ae7c1b78 2023-01-10 stsp 
  37 ae7c1b78 2023-01-10 stsp #include "got_error.h"
  38 ae7c1b78 2023-01-10 stsp #include "got_repository.h"
  39 ae7c1b78 2023-01-10 stsp #include "got_object.h"
  40 ae7c1b78 2023-01-10 stsp #include "got_path.h"
  41 ae7c1b78 2023-01-10 stsp #include "got_reference.h"
  42 ae7c1b78 2023-01-10 stsp #include "got_opentemp.h"
  43 ae7c1b78 2023-01-10 stsp 
  44 53bf0b54 2023-02-23 op #include "got_lib_hash.h"
  45 ae7c1b78 2023-01-10 stsp #include "got_lib_delta.h"
  46 ae7c1b78 2023-01-10 stsp #include "got_lib_object.h"
  47 ae7c1b78 2023-01-10 stsp #include "got_lib_object_cache.h"
  48 ae7c1b78 2023-01-10 stsp #include "got_lib_pack.h"
  49 ae7c1b78 2023-01-10 stsp #include "got_lib_repository.h"
  50 ae7c1b78 2023-01-10 stsp #include "got_lib_gitproto.h"
  51 ae7c1b78 2023-01-10 stsp 
  52 ae7c1b78 2023-01-10 stsp #include "gotd.h"
  53 ae7c1b78 2023-01-10 stsp #include "log.h"
  54 ae7c1b78 2023-01-10 stsp #include "session.h"
  55 ae7c1b78 2023-01-10 stsp 
  56 ae7c1b78 2023-01-10 stsp 
  57 ae7c1b78 2023-01-10 stsp static struct gotd_session {
  58 ae7c1b78 2023-01-10 stsp 	pid_t pid;
  59 ae7c1b78 2023-01-10 stsp 	const char *title;
  60 ae7c1b78 2023-01-10 stsp 	struct got_repository *repo;
  61 ae7c1b78 2023-01-10 stsp 	int *pack_fds;
  62 ae7c1b78 2023-01-10 stsp 	int *temp_fds;
  63 ae7c1b78 2023-01-10 stsp 	struct gotd_imsgev parent_iev;
  64 ae7c1b78 2023-01-10 stsp 	struct timeval request_timeout;
  65 ae7c1b78 2023-01-10 stsp } gotd_session;
  66 ae7c1b78 2023-01-10 stsp 
  67 ae7c1b78 2023-01-10 stsp static struct gotd_session_client {
  68 eac23c30 2023-01-10 stsp 	enum gotd_session_state		 state;
  69 ae7c1b78 2023-01-10 stsp 	int				 is_writing;
  70 ae7c1b78 2023-01-10 stsp 	struct gotd_client_capability	*capabilities;
  71 ae7c1b78 2023-01-10 stsp 	size_t				 ncapa_alloc;
  72 ae7c1b78 2023-01-10 stsp 	size_t				 ncapabilities;
  73 ae7c1b78 2023-01-10 stsp 	uint32_t			 id;
  74 ae7c1b78 2023-01-10 stsp 	int				 fd;
  75 ae7c1b78 2023-01-10 stsp 	int				 delta_cache_fd;
  76 ae7c1b78 2023-01-10 stsp 	struct gotd_imsgev		 iev;
  77 ae7c1b78 2023-01-10 stsp 	struct gotd_imsgev		 repo_child_iev;
  78 ae7c1b78 2023-01-10 stsp 	struct event			 tmo;
  79 ae7c1b78 2023-01-10 stsp 	uid_t				 euid;
  80 ae7c1b78 2023-01-10 stsp 	gid_t				 egid;
  81 ae7c1b78 2023-01-10 stsp 	char				*packfile_path;
  82 ae7c1b78 2023-01-10 stsp 	char				*packidx_path;
  83 ae7c1b78 2023-01-10 stsp 	int				 nref_updates;
  84 3448a19a 2023-01-21 stsp 	int				 accept_flush_pkt;
  85 ae7c1b78 2023-01-10 stsp } gotd_session_client;
  86 ae7c1b78 2023-01-10 stsp 
  87 ae7c1b78 2023-01-10 stsp void gotd_session_sighdlr(int sig, short event, void *arg);
  88 ae7c1b78 2023-01-10 stsp static void gotd_session_shutdown(void);
  89 ae7c1b78 2023-01-10 stsp 
  90 ae7c1b78 2023-01-10 stsp static void
  91 ae7c1b78 2023-01-10 stsp disconnect(struct gotd_session_client *client)
  92 ae7c1b78 2023-01-10 stsp {
  93 ae7c1b78 2023-01-10 stsp 	log_debug("uid %d: disconnecting", client->euid);
  94 ae7c1b78 2023-01-10 stsp 
  95 ae7c1b78 2023-01-10 stsp 	if (gotd_imsg_compose_event(&gotd_session.parent_iev,
  96 ae7c1b78 2023-01-10 stsp 	    GOTD_IMSG_DISCONNECT, PROC_SESSION, -1, NULL, 0) == -1)
  97 ae7c1b78 2023-01-10 stsp 		log_warn("imsg compose DISCONNECT");
  98 ae7c1b78 2023-01-10 stsp 
  99 ae7c1b78 2023-01-10 stsp 	imsg_clear(&client->repo_child_iev.ibuf);
 100 ae7c1b78 2023-01-10 stsp 	event_del(&client->repo_child_iev.ev);
 101 ae7c1b78 2023-01-10 stsp 	evtimer_del(&client->tmo);
 102 ae7c1b78 2023-01-10 stsp 	close(client->fd);
 103 ae7c1b78 2023-01-10 stsp 	if (client->delta_cache_fd != -1)
 104 ae7c1b78 2023-01-10 stsp 		close(client->delta_cache_fd);
 105 ae7c1b78 2023-01-10 stsp 	if (client->packfile_path) {
 106 ae7c1b78 2023-01-10 stsp 		if (unlink(client->packfile_path) == -1 && errno != ENOENT)
 107 ae7c1b78 2023-01-10 stsp 			log_warn("unlink %s: ", client->packfile_path);
 108 ae7c1b78 2023-01-10 stsp 		free(client->packfile_path);
 109 ae7c1b78 2023-01-10 stsp 	}
 110 ae7c1b78 2023-01-10 stsp 	if (client->packidx_path) {
 111 ae7c1b78 2023-01-10 stsp 		if (unlink(client->packidx_path) == -1 && errno != ENOENT)
 112 ae7c1b78 2023-01-10 stsp 			log_warn("unlink %s: ", client->packidx_path);
 113 ae7c1b78 2023-01-10 stsp 		free(client->packidx_path);
 114 ae7c1b78 2023-01-10 stsp 	}
 115 ae7c1b78 2023-01-10 stsp 	free(client->capabilities);
 116 ae7c1b78 2023-01-10 stsp 
 117 ae7c1b78 2023-01-10 stsp 	gotd_session_shutdown();
 118 ae7c1b78 2023-01-10 stsp }
 119 ae7c1b78 2023-01-10 stsp 
 120 ae7c1b78 2023-01-10 stsp static void
 121 ae7c1b78 2023-01-10 stsp disconnect_on_error(struct gotd_session_client *client,
 122 ae7c1b78 2023-01-10 stsp     const struct got_error *err)
 123 ae7c1b78 2023-01-10 stsp {
 124 ae7c1b78 2023-01-10 stsp 	struct imsgbuf ibuf;
 125 ae7c1b78 2023-01-10 stsp 
 126 ae7c1b78 2023-01-10 stsp 	log_warnx("uid %d: %s", client->euid, err->msg);
 127 ae7c1b78 2023-01-10 stsp 	if (err->code != GOT_ERR_EOF) {
 128 ae7c1b78 2023-01-10 stsp 		imsg_init(&ibuf, client->fd);
 129 ae7c1b78 2023-01-10 stsp 		gotd_imsg_send_error(&ibuf, 0, PROC_SESSION, err);
 130 ae7c1b78 2023-01-10 stsp 		imsg_clear(&ibuf);
 131 ae7c1b78 2023-01-10 stsp 	}
 132 ae7c1b78 2023-01-10 stsp 
 133 ae7c1b78 2023-01-10 stsp 	disconnect(client);
 134 ae7c1b78 2023-01-10 stsp }
 135 ae7c1b78 2023-01-10 stsp 
 136 ae7c1b78 2023-01-10 stsp static void
 137 ae7c1b78 2023-01-10 stsp gotd_request_timeout(int fd, short events, void *arg)
 138 ae7c1b78 2023-01-10 stsp {
 139 ae7c1b78 2023-01-10 stsp 	struct gotd_session_client *client = arg;
 140 ae7c1b78 2023-01-10 stsp 
 141 ae7c1b78 2023-01-10 stsp 	log_debug("disconnecting uid %d due to timeout", client->euid);
 142 ae7c1b78 2023-01-10 stsp 	disconnect(client);
 143 ae7c1b78 2023-01-10 stsp }
 144 ae7c1b78 2023-01-10 stsp 
 145 ae7c1b78 2023-01-10 stsp void
 146 ae7c1b78 2023-01-10 stsp gotd_session_sighdlr(int sig, short event, void *arg)
 147 ae7c1b78 2023-01-10 stsp {
 148 ae7c1b78 2023-01-10 stsp 	/*
 149 ae7c1b78 2023-01-10 stsp 	 * Normal signal handler rules don't apply because libevent
 150 ae7c1b78 2023-01-10 stsp 	 * decouples for us.
 151 ae7c1b78 2023-01-10 stsp 	 */
 152 ae7c1b78 2023-01-10 stsp 
 153 ae7c1b78 2023-01-10 stsp 	switch (sig) {
 154 ae7c1b78 2023-01-10 stsp 	case SIGHUP:
 155 ae7c1b78 2023-01-10 stsp 		log_info("%s: ignoring SIGHUP", __func__);
 156 ae7c1b78 2023-01-10 stsp 		break;
 157 ae7c1b78 2023-01-10 stsp 	case SIGUSR1:
 158 ae7c1b78 2023-01-10 stsp 		log_info("%s: ignoring SIGUSR1", __func__);
 159 ae7c1b78 2023-01-10 stsp 		break;
 160 ae7c1b78 2023-01-10 stsp 	case SIGTERM:
 161 ae7c1b78 2023-01-10 stsp 	case SIGINT:
 162 ae7c1b78 2023-01-10 stsp 		gotd_session_shutdown();
 163 ae7c1b78 2023-01-10 stsp 		/* NOTREACHED */
 164 ae7c1b78 2023-01-10 stsp 		break;
 165 ae7c1b78 2023-01-10 stsp 	default:
 166 ae7c1b78 2023-01-10 stsp 		fatalx("unexpected signal");
 167 ae7c1b78 2023-01-10 stsp 	}
 168 ae7c1b78 2023-01-10 stsp }
 169 ae7c1b78 2023-01-10 stsp 
 170 ae7c1b78 2023-01-10 stsp static const struct got_error *
 171 ae7c1b78 2023-01-10 stsp recv_packfile_done(uint32_t *client_id, struct imsg *imsg)
 172 ae7c1b78 2023-01-10 stsp {
 173 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_packfile_done idone;
 174 ae7c1b78 2023-01-10 stsp 	size_t datalen;
 175 ae7c1b78 2023-01-10 stsp 
 176 ae7c1b78 2023-01-10 stsp 	log_debug("packfile-done received");
 177 ae7c1b78 2023-01-10 stsp 
 178 ae7c1b78 2023-01-10 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 179 ae7c1b78 2023-01-10 stsp 	if (datalen != sizeof(idone))
 180 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 181 ae7c1b78 2023-01-10 stsp 	memcpy(&idone, imsg->data, sizeof(idone));
 182 ae7c1b78 2023-01-10 stsp 
 183 ae7c1b78 2023-01-10 stsp 	*client_id = idone.client_id;
 184 ae7c1b78 2023-01-10 stsp 	return NULL;
 185 ae7c1b78 2023-01-10 stsp }
 186 ae7c1b78 2023-01-10 stsp 
 187 ae7c1b78 2023-01-10 stsp static const struct got_error *
 188 ae7c1b78 2023-01-10 stsp recv_packfile_install(uint32_t *client_id, struct imsg *imsg)
 189 ae7c1b78 2023-01-10 stsp {
 190 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_packfile_install inst;
 191 ae7c1b78 2023-01-10 stsp 	size_t datalen;
 192 ae7c1b78 2023-01-10 stsp 
 193 ae7c1b78 2023-01-10 stsp 	log_debug("packfile-install received");
 194 ae7c1b78 2023-01-10 stsp 
 195 ae7c1b78 2023-01-10 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 196 ae7c1b78 2023-01-10 stsp 	if (datalen != sizeof(inst))
 197 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 198 ae7c1b78 2023-01-10 stsp 	memcpy(&inst, imsg->data, sizeof(inst));
 199 ae7c1b78 2023-01-10 stsp 
 200 ae7c1b78 2023-01-10 stsp 	*client_id = inst.client_id;
 201 ae7c1b78 2023-01-10 stsp 	return NULL;
 202 ae7c1b78 2023-01-10 stsp }
 203 ae7c1b78 2023-01-10 stsp 
 204 ae7c1b78 2023-01-10 stsp static const struct got_error *
 205 ae7c1b78 2023-01-10 stsp recv_ref_updates_start(uint32_t *client_id, struct imsg *imsg)
 206 ae7c1b78 2023-01-10 stsp {
 207 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_ref_updates_start istart;
 208 ae7c1b78 2023-01-10 stsp 	size_t datalen;
 209 ae7c1b78 2023-01-10 stsp 
 210 ae7c1b78 2023-01-10 stsp 	log_debug("ref-updates-start received");
 211 ae7c1b78 2023-01-10 stsp 
 212 ae7c1b78 2023-01-10 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 213 ae7c1b78 2023-01-10 stsp 	if (datalen != sizeof(istart))
 214 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 215 ae7c1b78 2023-01-10 stsp 	memcpy(&istart, imsg->data, sizeof(istart));
 216 ae7c1b78 2023-01-10 stsp 
 217 ae7c1b78 2023-01-10 stsp 	*client_id = istart.client_id;
 218 ae7c1b78 2023-01-10 stsp 	return NULL;
 219 ae7c1b78 2023-01-10 stsp }
 220 ae7c1b78 2023-01-10 stsp 
 221 ae7c1b78 2023-01-10 stsp static const struct got_error *
 222 ae7c1b78 2023-01-10 stsp recv_ref_update(uint32_t *client_id, struct imsg *imsg)
 223 ae7c1b78 2023-01-10 stsp {
 224 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_ref_update iref;
 225 ae7c1b78 2023-01-10 stsp 	size_t datalen;
 226 ae7c1b78 2023-01-10 stsp 
 227 ae7c1b78 2023-01-10 stsp 	log_debug("ref-update received");
 228 ae7c1b78 2023-01-10 stsp 
 229 ae7c1b78 2023-01-10 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 230 ae7c1b78 2023-01-10 stsp 	if (datalen < sizeof(iref))
 231 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 232 ae7c1b78 2023-01-10 stsp 	memcpy(&iref, imsg->data, sizeof(iref));
 233 ae7c1b78 2023-01-10 stsp 
 234 ae7c1b78 2023-01-10 stsp 	*client_id = iref.client_id;
 235 ae7c1b78 2023-01-10 stsp 	return NULL;
 236 ae7c1b78 2023-01-10 stsp }
 237 ae7c1b78 2023-01-10 stsp 
 238 ae7c1b78 2023-01-10 stsp static const struct got_error *
 239 ae7c1b78 2023-01-10 stsp send_ref_update_ok(struct gotd_session_client *client,
 240 ae7c1b78 2023-01-10 stsp     struct gotd_imsg_ref_update *iref, const char *refname)
 241 ae7c1b78 2023-01-10 stsp {
 242 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_ref_update_ok iok;
 243 ae7c1b78 2023-01-10 stsp 	struct gotd_imsgev *iev = &client->iev;
 244 ae7c1b78 2023-01-10 stsp 	struct ibuf *wbuf;
 245 ae7c1b78 2023-01-10 stsp 	size_t len;
 246 ae7c1b78 2023-01-10 stsp 
 247 ae7c1b78 2023-01-10 stsp 	memset(&iok, 0, sizeof(iok));
 248 ae7c1b78 2023-01-10 stsp 	iok.client_id = client->id;
 249 ae7c1b78 2023-01-10 stsp 	memcpy(iok.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
 250 ae7c1b78 2023-01-10 stsp 	memcpy(iok.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
 251 ae7c1b78 2023-01-10 stsp 	iok.name_len = strlen(refname);
 252 ae7c1b78 2023-01-10 stsp 
 253 ae7c1b78 2023-01-10 stsp 	len = sizeof(iok) + iok.name_len;
 254 ae7c1b78 2023-01-10 stsp 	wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE_OK,
 255 ae7c1b78 2023-01-10 stsp 	    PROC_SESSION, gotd_session.pid, len);
 256 ae7c1b78 2023-01-10 stsp 	if (wbuf == NULL)
 257 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("imsg_create REF_UPDATE_OK");
 258 ae7c1b78 2023-01-10 stsp 
 259 ae7c1b78 2023-01-10 stsp 	if (imsg_add(wbuf, &iok, sizeof(iok)) == -1)
 260 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_OK");
 261 ae7c1b78 2023-01-10 stsp 	if (imsg_add(wbuf, refname, iok.name_len) == -1)
 262 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_OK");
 263 ae7c1b78 2023-01-10 stsp 
 264 ae7c1b78 2023-01-10 stsp 	wbuf->fd = -1;
 265 ae7c1b78 2023-01-10 stsp 	imsg_close(&iev->ibuf, wbuf);
 266 ae7c1b78 2023-01-10 stsp 	gotd_imsg_event_add(iev);
 267 ae7c1b78 2023-01-10 stsp 	return NULL;
 268 ae7c1b78 2023-01-10 stsp }
 269 ae7c1b78 2023-01-10 stsp 
 270 ae7c1b78 2023-01-10 stsp static void
 271 ae7c1b78 2023-01-10 stsp send_refs_updated(struct gotd_session_client *client)
 272 ae7c1b78 2023-01-10 stsp {
 273 ae7c1b78 2023-01-10 stsp 	if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_REFS_UPDATED,
 274 ae7c1b78 2023-01-10 stsp 	    PROC_SESSION, -1, NULL, 0) == -1)
 275 ae7c1b78 2023-01-10 stsp 		log_warn("imsg compose REFS_UPDATED");
 276 ae7c1b78 2023-01-10 stsp }
 277 ae7c1b78 2023-01-10 stsp 
 278 ae7c1b78 2023-01-10 stsp static const struct got_error *
 279 ae7c1b78 2023-01-10 stsp send_ref_update_ng(struct gotd_session_client *client,
 280 ae7c1b78 2023-01-10 stsp     struct gotd_imsg_ref_update *iref, const char *refname,
 281 ae7c1b78 2023-01-10 stsp     const char *reason)
 282 ae7c1b78 2023-01-10 stsp {
 283 ae7c1b78 2023-01-10 stsp 	const struct got_error *ng_err;
 284 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_ref_update_ng ing;
 285 ae7c1b78 2023-01-10 stsp 	struct gotd_imsgev *iev = &client->iev;
 286 ae7c1b78 2023-01-10 stsp 	struct ibuf *wbuf;
 287 ae7c1b78 2023-01-10 stsp 	size_t len;
 288 ae7c1b78 2023-01-10 stsp 
 289 ae7c1b78 2023-01-10 stsp 	memset(&ing, 0, sizeof(ing));
 290 ae7c1b78 2023-01-10 stsp 	ing.client_id = client->id;
 291 ae7c1b78 2023-01-10 stsp 	memcpy(ing.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
 292 ae7c1b78 2023-01-10 stsp 	memcpy(ing.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
 293 ae7c1b78 2023-01-10 stsp 	ing.name_len = strlen(refname);
 294 ae7c1b78 2023-01-10 stsp 
 295 ae7c1b78 2023-01-10 stsp 	ng_err = got_error_fmt(GOT_ERR_REF_BUSY, "%s", reason);
 296 ae7c1b78 2023-01-10 stsp 	ing.reason_len = strlen(ng_err->msg);
 297 ae7c1b78 2023-01-10 stsp 
 298 ae7c1b78 2023-01-10 stsp 	len = sizeof(ing) + ing.name_len + ing.reason_len;
 299 ae7c1b78 2023-01-10 stsp 	wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE_NG,
 300 ae7c1b78 2023-01-10 stsp 	    PROC_SESSION, gotd_session.pid, len);
 301 ae7c1b78 2023-01-10 stsp 	if (wbuf == NULL)
 302 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("imsg_create REF_UPDATE_NG");
 303 ae7c1b78 2023-01-10 stsp 
 304 ae7c1b78 2023-01-10 stsp 	if (imsg_add(wbuf, &ing, sizeof(ing)) == -1)
 305 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
 306 ae7c1b78 2023-01-10 stsp 	if (imsg_add(wbuf, refname, ing.name_len) == -1)
 307 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
 308 ae7c1b78 2023-01-10 stsp 	if (imsg_add(wbuf, ng_err->msg, ing.reason_len) == -1)
 309 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
 310 ae7c1b78 2023-01-10 stsp 
 311 ae7c1b78 2023-01-10 stsp 	wbuf->fd = -1;
 312 ae7c1b78 2023-01-10 stsp 	imsg_close(&iev->ibuf, wbuf);
 313 ae7c1b78 2023-01-10 stsp 	gotd_imsg_event_add(iev);
 314 ae7c1b78 2023-01-10 stsp 	return NULL;
 315 ae7c1b78 2023-01-10 stsp }
 316 ae7c1b78 2023-01-10 stsp 
 317 ae7c1b78 2023-01-10 stsp static const struct got_error *
 318 ae7c1b78 2023-01-10 stsp install_pack(struct gotd_session_client *client, const char *repo_path,
 319 ae7c1b78 2023-01-10 stsp     struct imsg *imsg)
 320 ae7c1b78 2023-01-10 stsp {
 321 ae7c1b78 2023-01-10 stsp 	const struct got_error *err = NULL;
 322 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_packfile_install inst;
 323 ae7c1b78 2023-01-10 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
 324 ae7c1b78 2023-01-10 stsp 	size_t datalen;
 325 ae7c1b78 2023-01-10 stsp 	char *packfile_path = NULL, *packidx_path = NULL;
 326 ae7c1b78 2023-01-10 stsp 
 327 ae7c1b78 2023-01-10 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 328 ae7c1b78 2023-01-10 stsp 	if (datalen != sizeof(inst))
 329 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 330 ae7c1b78 2023-01-10 stsp 	memcpy(&inst, imsg->data, sizeof(inst));
 331 ae7c1b78 2023-01-10 stsp 
 332 ae7c1b78 2023-01-10 stsp 	if (client->packfile_path == NULL)
 333 ae7c1b78 2023-01-10 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
 334 ae7c1b78 2023-01-10 stsp 		    "client has no pack file");
 335 ae7c1b78 2023-01-10 stsp 	if (client->packidx_path == NULL)
 336 ae7c1b78 2023-01-10 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
 337 ae7c1b78 2023-01-10 stsp 		    "client has no pack file index");
 338 ae7c1b78 2023-01-10 stsp 
 339 ae7c1b78 2023-01-10 stsp 	if (got_sha1_digest_to_str(inst.pack_sha1, hex, sizeof(hex)) == NULL)
 340 ae7c1b78 2023-01-10 stsp 		return got_error_msg(GOT_ERR_NO_SPACE,
 341 ae7c1b78 2023-01-10 stsp 		    "could not convert pack file SHA1 to hex");
 342 ae7c1b78 2023-01-10 stsp 
 343 ae7c1b78 2023-01-10 stsp 	if (asprintf(&packfile_path, "/%s/%s/pack-%s.pack",
 344 ae7c1b78 2023-01-10 stsp 	    repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
 345 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("asprintf");
 346 ae7c1b78 2023-01-10 stsp 		goto done;
 347 ae7c1b78 2023-01-10 stsp 	}
 348 ae7c1b78 2023-01-10 stsp 
 349 ae7c1b78 2023-01-10 stsp 	if (asprintf(&packidx_path, "/%s/%s/pack-%s.idx",
 350 ae7c1b78 2023-01-10 stsp 	    repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
 351 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("asprintf");
 352 ae7c1b78 2023-01-10 stsp 		goto done;
 353 ae7c1b78 2023-01-10 stsp 	}
 354 ae7c1b78 2023-01-10 stsp 
 355 ae7c1b78 2023-01-10 stsp 	if (rename(client->packfile_path, packfile_path) == -1) {
 356 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno3("rename", client->packfile_path,
 357 ae7c1b78 2023-01-10 stsp 		    packfile_path);
 358 ae7c1b78 2023-01-10 stsp 		goto done;
 359 ae7c1b78 2023-01-10 stsp 	}
 360 ae7c1b78 2023-01-10 stsp 
 361 ae7c1b78 2023-01-10 stsp 	free(client->packfile_path);
 362 ae7c1b78 2023-01-10 stsp 	client->packfile_path = NULL;
 363 ae7c1b78 2023-01-10 stsp 
 364 ae7c1b78 2023-01-10 stsp 	if (rename(client->packidx_path, packidx_path) == -1) {
 365 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno3("rename", client->packidx_path,
 366 ae7c1b78 2023-01-10 stsp 		    packidx_path);
 367 ae7c1b78 2023-01-10 stsp 		goto done;
 368 ae7c1b78 2023-01-10 stsp 	}
 369 ae7c1b78 2023-01-10 stsp 
 370 ae7c1b78 2023-01-10 stsp 	free(client->packidx_path);
 371 ae7c1b78 2023-01-10 stsp 	client->packidx_path = NULL;
 372 ae7c1b78 2023-01-10 stsp done:
 373 ae7c1b78 2023-01-10 stsp 	free(packfile_path);
 374 ae7c1b78 2023-01-10 stsp 	free(packidx_path);
 375 ae7c1b78 2023-01-10 stsp 	return err;
 376 ae7c1b78 2023-01-10 stsp }
 377 ae7c1b78 2023-01-10 stsp 
 378 ae7c1b78 2023-01-10 stsp static const struct got_error *
 379 ae7c1b78 2023-01-10 stsp begin_ref_updates(struct gotd_session_client *client, struct imsg *imsg)
 380 ae7c1b78 2023-01-10 stsp {
 381 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_ref_updates_start istart;
 382 ae7c1b78 2023-01-10 stsp 	size_t datalen;
 383 ae7c1b78 2023-01-10 stsp 
 384 ae7c1b78 2023-01-10 stsp 	if (client->nref_updates != -1)
 385 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
 386 ae7c1b78 2023-01-10 stsp 
 387 ae7c1b78 2023-01-10 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 388 ae7c1b78 2023-01-10 stsp 	if (datalen != sizeof(istart))
 389 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 390 ae7c1b78 2023-01-10 stsp 	memcpy(&istart, imsg->data, sizeof(istart));
 391 ae7c1b78 2023-01-10 stsp 
 392 ae7c1b78 2023-01-10 stsp 	if (istart.nref_updates <= 0)
 393 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
 394 ae7c1b78 2023-01-10 stsp 
 395 ae7c1b78 2023-01-10 stsp 	client->nref_updates = istart.nref_updates;
 396 ae7c1b78 2023-01-10 stsp 	return NULL;
 397 ae7c1b78 2023-01-10 stsp }
 398 ae7c1b78 2023-01-10 stsp 
 399 ae7c1b78 2023-01-10 stsp static const struct got_error *
 400 0ff2c315 2023-01-18 stsp update_ref(int *shut, struct gotd_session_client *client,
 401 0ff2c315 2023-01-18 stsp     const char *repo_path, struct imsg *imsg)
 402 ae7c1b78 2023-01-10 stsp {
 403 ae7c1b78 2023-01-10 stsp 	const struct got_error *err = NULL;
 404 ae7c1b78 2023-01-10 stsp 	struct got_repository *repo = NULL;
 405 ae7c1b78 2023-01-10 stsp 	struct got_reference *ref = NULL;
 406 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_ref_update iref;
 407 ae7c1b78 2023-01-10 stsp 	struct got_object_id old_id, new_id;
 408 ae7c1b78 2023-01-10 stsp 	struct got_object_id *id = NULL;
 409 ae7c1b78 2023-01-10 stsp 	struct got_object *obj = NULL;
 410 ae7c1b78 2023-01-10 stsp 	char *refname = NULL;
 411 ae7c1b78 2023-01-10 stsp 	size_t datalen;
 412 ae7c1b78 2023-01-10 stsp 	int locked = 0;
 413 1df1761f 2023-06-16 stsp 	char hex1[SHA1_DIGEST_STRING_LENGTH];
 414 1df1761f 2023-06-16 stsp 	char hex2[SHA1_DIGEST_STRING_LENGTH];
 415 ae7c1b78 2023-01-10 stsp 
 416 ae7c1b78 2023-01-10 stsp 	log_debug("update-ref from uid %d", client->euid);
 417 ae7c1b78 2023-01-10 stsp 
 418 ae7c1b78 2023-01-10 stsp 	if (client->nref_updates <= 0)
 419 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
 420 ae7c1b78 2023-01-10 stsp 
 421 ae7c1b78 2023-01-10 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 422 ae7c1b78 2023-01-10 stsp 	if (datalen < sizeof(iref))
 423 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 424 ae7c1b78 2023-01-10 stsp 	memcpy(&iref, imsg->data, sizeof(iref));
 425 ae7c1b78 2023-01-10 stsp 	if (datalen != sizeof(iref) + iref.name_len)
 426 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 427 00b3e9ae 2023-01-11 op 	refname = strndup(imsg->data + sizeof(iref), iref.name_len);
 428 ae7c1b78 2023-01-10 stsp 	if (refname == NULL)
 429 00b3e9ae 2023-01-11 op 		return got_error_from_errno("strndup");
 430 ae7c1b78 2023-01-10 stsp 
 431 ae7c1b78 2023-01-10 stsp 	log_debug("updating ref %s for uid %d", refname, client->euid);
 432 ae7c1b78 2023-01-10 stsp 
 433 ae7c1b78 2023-01-10 stsp 	err = got_repo_open(&repo, repo_path, NULL, NULL);
 434 ae7c1b78 2023-01-10 stsp 	if (err)
 435 ae7c1b78 2023-01-10 stsp 		goto done;
 436 ae7c1b78 2023-01-10 stsp 
 437 ae7c1b78 2023-01-10 stsp 	memcpy(old_id.sha1, iref.old_id, SHA1_DIGEST_LENGTH);
 438 ae7c1b78 2023-01-10 stsp 	memcpy(new_id.sha1, iref.new_id, SHA1_DIGEST_LENGTH);
 439 9a8e357c 2023-01-28 op 	err = got_object_open(&obj, repo,
 440 9a8e357c 2023-01-28 op 	    iref.delete_ref ? &old_id : &new_id);
 441 ae7c1b78 2023-01-10 stsp 	if (err)
 442 ae7c1b78 2023-01-10 stsp 		goto done;
 443 ae7c1b78 2023-01-10 stsp 
 444 ae7c1b78 2023-01-10 stsp 	if (iref.ref_is_new) {
 445 ae7c1b78 2023-01-10 stsp 		err = got_ref_open(&ref, repo, refname, 0);
 446 ae7c1b78 2023-01-10 stsp 		if (err) {
 447 ae7c1b78 2023-01-10 stsp 			if (err->code != GOT_ERR_NOT_REF)
 448 ae7c1b78 2023-01-10 stsp 				goto done;
 449 ae7c1b78 2023-01-10 stsp 			err = got_ref_alloc(&ref, refname, &new_id);
 450 ae7c1b78 2023-01-10 stsp 			if (err)
 451 ae7c1b78 2023-01-10 stsp 				goto done;
 452 ae7c1b78 2023-01-10 stsp 			err = got_ref_write(ref, repo); /* will lock/unlock */
 453 ae7c1b78 2023-01-10 stsp 			if (err)
 454 ae7c1b78 2023-01-10 stsp 				goto done;
 455 ae7c1b78 2023-01-10 stsp 		} else {
 456 1df1761f 2023-06-16 stsp 			err = got_ref_resolve(&id, repo, ref);
 457 1df1761f 2023-06-16 stsp 			if (err)
 458 1df1761f 2023-06-16 stsp 				goto done;
 459 1df1761f 2023-06-16 stsp 			got_object_id_hex(&new_id, hex1, sizeof(hex1));
 460 1df1761f 2023-06-16 stsp 			got_object_id_hex(id, hex2, sizeof(hex2));
 461 ae7c1b78 2023-01-10 stsp 			err = got_error_fmt(GOT_ERR_REF_BUSY,
 462 1df1761f 2023-06-16 stsp 			    "Addition %s: %s failed; %s: %s has been "
 463 1df1761f 2023-06-16 stsp 			    "created by someone else while transaction "
 464 1df1761f 2023-06-16 stsp 			    "was in progress",
 465 1df1761f 2023-06-16 stsp 			    got_ref_get_name(ref), hex1,
 466 1df1761f 2023-06-16 stsp 			    got_ref_get_name(ref), hex2);
 467 ae7c1b78 2023-01-10 stsp 			goto done;
 468 ae7c1b78 2023-01-10 stsp 		}
 469 9a8e357c 2023-01-28 op 	} else if (iref.delete_ref) {
 470 9a8e357c 2023-01-28 op 		err = got_ref_open(&ref, repo, refname, 1 /* lock */);
 471 9a8e357c 2023-01-28 op 		if (err)
 472 9a8e357c 2023-01-28 op 			goto done;
 473 9a8e357c 2023-01-28 op 		locked = 1;
 474 9a8e357c 2023-01-28 op 
 475 9a8e357c 2023-01-28 op 		err = got_ref_resolve(&id, repo, ref);
 476 9a8e357c 2023-01-28 op 		if (err)
 477 9a8e357c 2023-01-28 op 			goto done;
 478 9a8e357c 2023-01-28 op 
 479 9a8e357c 2023-01-28 op 		if (got_object_id_cmp(id, &old_id) != 0) {
 480 1df1761f 2023-06-16 stsp 			got_object_id_hex(&old_id, hex1, sizeof(hex1));
 481 1df1761f 2023-06-16 stsp 			got_object_id_hex(id, hex2, sizeof(hex2));
 482 9a8e357c 2023-01-28 op 			err = got_error_fmt(GOT_ERR_REF_BUSY,
 483 1df1761f 2023-06-16 stsp 			    "Deletion %s: %s failed; %s: %s has been "
 484 1df1761f 2023-06-16 stsp 			    "created by someone else while transaction "
 485 1df1761f 2023-06-16 stsp 			    "was in progress",
 486 1df1761f 2023-06-16 stsp 			    got_ref_get_name(ref), hex1,
 487 1df1761f 2023-06-16 stsp 			    got_ref_get_name(ref), hex2);
 488 9a8e357c 2023-01-28 op 			goto done;
 489 9a8e357c 2023-01-28 op 		}
 490 9a8e357c 2023-01-28 op 
 491 9a8e357c 2023-01-28 op 		err = got_ref_delete(ref, repo);
 492 9a8e357c 2023-01-28 op 		if (err)
 493 9a8e357c 2023-01-28 op 			goto done;
 494 9a8e357c 2023-01-28 op 
 495 9a8e357c 2023-01-28 op 		free(id);
 496 9a8e357c 2023-01-28 op 		id = NULL;
 497 ae7c1b78 2023-01-10 stsp 	} else {
 498 ae7c1b78 2023-01-10 stsp 		err = got_ref_open(&ref, repo, refname, 1 /* lock */);
 499 ae7c1b78 2023-01-10 stsp 		if (err)
 500 ae7c1b78 2023-01-10 stsp 			goto done;
 501 ae7c1b78 2023-01-10 stsp 		locked = 1;
 502 ae7c1b78 2023-01-10 stsp 
 503 ae7c1b78 2023-01-10 stsp 		err = got_ref_resolve(&id, repo, ref);
 504 ae7c1b78 2023-01-10 stsp 		if (err)
 505 ae7c1b78 2023-01-10 stsp 			goto done;
 506 ae7c1b78 2023-01-10 stsp 
 507 ae7c1b78 2023-01-10 stsp 		if (got_object_id_cmp(id, &old_id) != 0) {
 508 1df1761f 2023-06-16 stsp 			got_object_id_hex(&old_id, hex1, sizeof(hex1));
 509 1df1761f 2023-06-16 stsp 			got_object_id_hex(id, hex2, sizeof(hex2));
 510 ae7c1b78 2023-01-10 stsp 			err = got_error_fmt(GOT_ERR_REF_BUSY,
 511 1df1761f 2023-06-16 stsp 			    "Update %s: %s failed; %s: %s has been "
 512 1df1761f 2023-06-16 stsp 			    "created by someone else while transaction "
 513 1df1761f 2023-06-16 stsp 			    "was in progress",
 514 1df1761f 2023-06-16 stsp 			    got_ref_get_name(ref), hex1,
 515 1df1761f 2023-06-16 stsp 			    got_ref_get_name(ref), hex2);
 516 ae7c1b78 2023-01-10 stsp 			goto done;
 517 ae7c1b78 2023-01-10 stsp 		}
 518 ae7c1b78 2023-01-10 stsp 
 519 f8780fee 2023-06-16 stsp 		if (got_object_id_cmp(&new_id, &old_id) != 0) {
 520 f8780fee 2023-06-16 stsp 			err = got_ref_change_ref(ref, &new_id);
 521 f8780fee 2023-06-16 stsp 			if (err)
 522 f8780fee 2023-06-16 stsp 				goto done;
 523 ae7c1b78 2023-01-10 stsp 
 524 f8780fee 2023-06-16 stsp 			err = got_ref_write(ref, repo);
 525 f8780fee 2023-06-16 stsp 			if (err)
 526 f8780fee 2023-06-16 stsp 				goto done;
 527 f8780fee 2023-06-16 stsp 		}
 528 ae7c1b78 2023-01-10 stsp 
 529 ae7c1b78 2023-01-10 stsp 		free(id);
 530 ae7c1b78 2023-01-10 stsp 		id = NULL;
 531 ae7c1b78 2023-01-10 stsp 	}
 532 ae7c1b78 2023-01-10 stsp done:
 533 ae7c1b78 2023-01-10 stsp 	if (err) {
 534 ae7c1b78 2023-01-10 stsp 		if (err->code == GOT_ERR_LOCKFILE_TIMEOUT) {
 535 ae7c1b78 2023-01-10 stsp 			err = got_error_fmt(GOT_ERR_LOCKFILE_TIMEOUT,
 536 ae7c1b78 2023-01-10 stsp 			    "could not acquire exclusive file lock for %s",
 537 ae7c1b78 2023-01-10 stsp 			    refname);
 538 ae7c1b78 2023-01-10 stsp 		}
 539 ae7c1b78 2023-01-10 stsp 		send_ref_update_ng(client, &iref, refname, err->msg);
 540 ae7c1b78 2023-01-10 stsp 	} else
 541 ae7c1b78 2023-01-10 stsp 		send_ref_update_ok(client, &iref, refname);
 542 ae7c1b78 2023-01-10 stsp 
 543 ae7c1b78 2023-01-10 stsp 	if (client->nref_updates > 0) {
 544 ae7c1b78 2023-01-10 stsp 		client->nref_updates--;
 545 0ff2c315 2023-01-18 stsp 		if (client->nref_updates == 0) {
 546 ae7c1b78 2023-01-10 stsp 			send_refs_updated(client);
 547 0ff2c315 2023-01-18 stsp 			*shut = 1;
 548 0ff2c315 2023-01-18 stsp 		}
 549 ae7c1b78 2023-01-10 stsp 
 550 ae7c1b78 2023-01-10 stsp 	}
 551 ae7c1b78 2023-01-10 stsp 	if (locked) {
 552 ae7c1b78 2023-01-10 stsp 		const struct got_error *unlock_err;
 553 ae7c1b78 2023-01-10 stsp 		unlock_err = got_ref_unlock(ref);
 554 ae7c1b78 2023-01-10 stsp 		if (unlock_err && err == NULL)
 555 ae7c1b78 2023-01-10 stsp 			err = unlock_err;
 556 ae7c1b78 2023-01-10 stsp 	}
 557 ae7c1b78 2023-01-10 stsp 	if (ref)
 558 ae7c1b78 2023-01-10 stsp 		got_ref_close(ref);
 559 ae7c1b78 2023-01-10 stsp 	if (obj)
 560 ae7c1b78 2023-01-10 stsp 		got_object_close(obj);
 561 ae7c1b78 2023-01-10 stsp 	if (repo)
 562 ae7c1b78 2023-01-10 stsp 		got_repo_close(repo);
 563 ae7c1b78 2023-01-10 stsp 	free(refname);
 564 ae7c1b78 2023-01-10 stsp 	free(id);
 565 ae7c1b78 2023-01-10 stsp 	return err;
 566 ae7c1b78 2023-01-10 stsp }
 567 ae7c1b78 2023-01-10 stsp 
 568 ae7c1b78 2023-01-10 stsp static void
 569 ae7c1b78 2023-01-10 stsp session_dispatch_repo_child(int fd, short event, void *arg)
 570 ae7c1b78 2023-01-10 stsp {
 571 ae7c1b78 2023-01-10 stsp 	struct gotd_imsgev *iev = arg;
 572 ae7c1b78 2023-01-10 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
 573 ae7c1b78 2023-01-10 stsp 	struct gotd_session_client *client = &gotd_session_client;
 574 ae7c1b78 2023-01-10 stsp 	ssize_t n;
 575 ae7c1b78 2023-01-10 stsp 	int shut = 0;
 576 ae7c1b78 2023-01-10 stsp 	struct imsg imsg;
 577 ae7c1b78 2023-01-10 stsp 
 578 ae7c1b78 2023-01-10 stsp 	if (event & EV_READ) {
 579 ae7c1b78 2023-01-10 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
 580 ae7c1b78 2023-01-10 stsp 			fatal("imsg_read error");
 581 ae7c1b78 2023-01-10 stsp 		if (n == 0) {
 582 ae7c1b78 2023-01-10 stsp 			/* Connection closed. */
 583 ae7c1b78 2023-01-10 stsp 			shut = 1;
 584 ae7c1b78 2023-01-10 stsp 			goto done;
 585 ae7c1b78 2023-01-10 stsp 		}
 586 ae7c1b78 2023-01-10 stsp 	}
 587 ae7c1b78 2023-01-10 stsp 
 588 ae7c1b78 2023-01-10 stsp 	if (event & EV_WRITE) {
 589 ae7c1b78 2023-01-10 stsp 		n = msgbuf_write(&ibuf->w);
 590 ae7c1b78 2023-01-10 stsp 		if (n == -1 && errno != EAGAIN)
 591 ae7c1b78 2023-01-10 stsp 			fatal("msgbuf_write");
 592 ae7c1b78 2023-01-10 stsp 		if (n == 0) {
 593 ae7c1b78 2023-01-10 stsp 			/* Connection closed. */
 594 ae7c1b78 2023-01-10 stsp 			shut = 1;
 595 ae7c1b78 2023-01-10 stsp 			goto done;
 596 ae7c1b78 2023-01-10 stsp 		}
 597 ae7c1b78 2023-01-10 stsp 	}
 598 ae7c1b78 2023-01-10 stsp 
 599 ae7c1b78 2023-01-10 stsp 	for (;;) {
 600 ae7c1b78 2023-01-10 stsp 		const struct got_error *err = NULL;
 601 ae7c1b78 2023-01-10 stsp 		uint32_t client_id = 0;
 602 ae7c1b78 2023-01-10 stsp 		int do_disconnect = 0;
 603 ae7c1b78 2023-01-10 stsp 		int do_ref_updates = 0, do_ref_update = 0;
 604 ae7c1b78 2023-01-10 stsp 		int do_packfile_install = 0;
 605 ae7c1b78 2023-01-10 stsp 
 606 ae7c1b78 2023-01-10 stsp 		if ((n = imsg_get(ibuf, &imsg)) == -1)
 607 ae7c1b78 2023-01-10 stsp 			fatal("%s: imsg_get error", __func__);
 608 ae7c1b78 2023-01-10 stsp 		if (n == 0)	/* No more messages. */
 609 ae7c1b78 2023-01-10 stsp 			break;
 610 ae7c1b78 2023-01-10 stsp 
 611 ae7c1b78 2023-01-10 stsp 		switch (imsg.hdr.type) {
 612 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_ERROR:
 613 ae7c1b78 2023-01-10 stsp 			do_disconnect = 1;
 614 ae7c1b78 2023-01-10 stsp 			err = gotd_imsg_recv_error(&client_id, &imsg);
 615 ae7c1b78 2023-01-10 stsp 			break;
 616 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_PACKFILE_DONE:
 617 ae7c1b78 2023-01-10 stsp 			do_disconnect = 1;
 618 ae7c1b78 2023-01-10 stsp 			err = recv_packfile_done(&client_id, &imsg);
 619 ae7c1b78 2023-01-10 stsp 			break;
 620 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_PACKFILE_INSTALL:
 621 ae7c1b78 2023-01-10 stsp 			err = recv_packfile_install(&client_id, &imsg);
 622 ae7c1b78 2023-01-10 stsp 			if (err == NULL)
 623 ae7c1b78 2023-01-10 stsp 				do_packfile_install = 1;
 624 ae7c1b78 2023-01-10 stsp 			break;
 625 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_REF_UPDATES_START:
 626 ae7c1b78 2023-01-10 stsp 			err = recv_ref_updates_start(&client_id, &imsg);
 627 ae7c1b78 2023-01-10 stsp 			if (err == NULL)
 628 ae7c1b78 2023-01-10 stsp 				do_ref_updates = 1;
 629 ae7c1b78 2023-01-10 stsp 			break;
 630 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_REF_UPDATE:
 631 ae7c1b78 2023-01-10 stsp 			err = recv_ref_update(&client_id, &imsg);
 632 ae7c1b78 2023-01-10 stsp 			if (err == NULL)
 633 ae7c1b78 2023-01-10 stsp 				do_ref_update = 1;
 634 ae7c1b78 2023-01-10 stsp 			break;
 635 ae7c1b78 2023-01-10 stsp 		default:
 636 ae7c1b78 2023-01-10 stsp 			log_debug("unexpected imsg %d", imsg.hdr.type);
 637 ae7c1b78 2023-01-10 stsp 			break;
 638 ae7c1b78 2023-01-10 stsp 		}
 639 ae7c1b78 2023-01-10 stsp 
 640 ae7c1b78 2023-01-10 stsp 		if (do_disconnect) {
 641 ae7c1b78 2023-01-10 stsp 			if (err)
 642 ae7c1b78 2023-01-10 stsp 				disconnect_on_error(client, err);
 643 ae7c1b78 2023-01-10 stsp 			else
 644 ae7c1b78 2023-01-10 stsp 				disconnect(client);
 645 ae7c1b78 2023-01-10 stsp 		} else {
 646 ae7c1b78 2023-01-10 stsp 			if (do_packfile_install)
 647 ae7c1b78 2023-01-10 stsp 				err = install_pack(client,
 648 ae7c1b78 2023-01-10 stsp 				    gotd_session.repo->path, &imsg);
 649 ae7c1b78 2023-01-10 stsp 			else if (do_ref_updates)
 650 ae7c1b78 2023-01-10 stsp 				err = begin_ref_updates(client, &imsg);
 651 ae7c1b78 2023-01-10 stsp 			else if (do_ref_update)
 652 0ff2c315 2023-01-18 stsp 				err = update_ref(&shut, client,
 653 ae7c1b78 2023-01-10 stsp 				    gotd_session.repo->path, &imsg);
 654 ae7c1b78 2023-01-10 stsp 			if (err)
 655 ae7c1b78 2023-01-10 stsp 				log_warnx("uid %d: %s", client->euid, err->msg);
 656 ae7c1b78 2023-01-10 stsp 		}
 657 ae7c1b78 2023-01-10 stsp 		imsg_free(&imsg);
 658 ae7c1b78 2023-01-10 stsp 	}
 659 ae7c1b78 2023-01-10 stsp done:
 660 ae7c1b78 2023-01-10 stsp 	if (!shut) {
 661 ae7c1b78 2023-01-10 stsp 		gotd_imsg_event_add(iev);
 662 ae7c1b78 2023-01-10 stsp 	} else {
 663 ae7c1b78 2023-01-10 stsp 		/* This pipe is dead. Remove its event handler */
 664 ae7c1b78 2023-01-10 stsp 		event_del(&iev->ev);
 665 ae7c1b78 2023-01-10 stsp 		event_loopexit(NULL);
 666 ae7c1b78 2023-01-10 stsp 	}
 667 ae7c1b78 2023-01-10 stsp }
 668 ae7c1b78 2023-01-10 stsp 
 669 ae7c1b78 2023-01-10 stsp static const struct got_error *
 670 ae7c1b78 2023-01-10 stsp recv_capabilities(struct gotd_session_client *client, struct imsg *imsg)
 671 ae7c1b78 2023-01-10 stsp {
 672 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_capabilities icapas;
 673 ae7c1b78 2023-01-10 stsp 	size_t datalen;
 674 ae7c1b78 2023-01-10 stsp 
 675 ae7c1b78 2023-01-10 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 676 ae7c1b78 2023-01-10 stsp 	if (datalen != sizeof(icapas))
 677 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 678 ae7c1b78 2023-01-10 stsp 	memcpy(&icapas, imsg->data, sizeof(icapas));
 679 ae7c1b78 2023-01-10 stsp 
 680 ae7c1b78 2023-01-10 stsp 	client->ncapa_alloc = icapas.ncapabilities;
 681 ae7c1b78 2023-01-10 stsp 	client->capabilities = calloc(client->ncapa_alloc,
 682 ae7c1b78 2023-01-10 stsp 	    sizeof(*client->capabilities));
 683 ae7c1b78 2023-01-10 stsp 	if (client->capabilities == NULL) {
 684 ae7c1b78 2023-01-10 stsp 		client->ncapa_alloc = 0;
 685 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("calloc");
 686 ae7c1b78 2023-01-10 stsp 	}
 687 ae7c1b78 2023-01-10 stsp 
 688 ae7c1b78 2023-01-10 stsp 	log_debug("expecting %zu capabilities from uid %d",
 689 ae7c1b78 2023-01-10 stsp 	    client->ncapa_alloc, client->euid);
 690 ae7c1b78 2023-01-10 stsp 	return NULL;
 691 ae7c1b78 2023-01-10 stsp }
 692 ae7c1b78 2023-01-10 stsp 
 693 ae7c1b78 2023-01-10 stsp static const struct got_error *
 694 ae7c1b78 2023-01-10 stsp recv_capability(struct gotd_session_client *client, struct imsg *imsg)
 695 ae7c1b78 2023-01-10 stsp {
 696 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_capability icapa;
 697 ae7c1b78 2023-01-10 stsp 	struct gotd_client_capability *capa;
 698 ae7c1b78 2023-01-10 stsp 	size_t datalen;
 699 ae7c1b78 2023-01-10 stsp 	char *key, *value = NULL;
 700 ae7c1b78 2023-01-10 stsp 
 701 ae7c1b78 2023-01-10 stsp 	if (client->capabilities == NULL ||
 702 ae7c1b78 2023-01-10 stsp 	    client->ncapabilities >= client->ncapa_alloc) {
 703 ae7c1b78 2023-01-10 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
 704 ae7c1b78 2023-01-10 stsp 		    "unexpected capability received");
 705 ae7c1b78 2023-01-10 stsp 	}
 706 ae7c1b78 2023-01-10 stsp 
 707 ae7c1b78 2023-01-10 stsp 	memset(&icapa, 0, sizeof(icapa));
 708 ae7c1b78 2023-01-10 stsp 
 709 ae7c1b78 2023-01-10 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 710 ae7c1b78 2023-01-10 stsp 	if (datalen < sizeof(icapa))
 711 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 712 ae7c1b78 2023-01-10 stsp 	memcpy(&icapa, imsg->data, sizeof(icapa));
 713 ae7c1b78 2023-01-10 stsp 
 714 ae7c1b78 2023-01-10 stsp 	if (datalen != sizeof(icapa) + icapa.key_len + icapa.value_len)
 715 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 716 ae7c1b78 2023-01-10 stsp 
 717 00b3e9ae 2023-01-11 op 	key = strndup(imsg->data + sizeof(icapa), icapa.key_len);
 718 ae7c1b78 2023-01-10 stsp 	if (key == NULL)
 719 00b3e9ae 2023-01-11 op 		return got_error_from_errno("strndup");
 720 ae7c1b78 2023-01-10 stsp 	if (icapa.value_len > 0) {
 721 00b3e9ae 2023-01-11 op 		value = strndup(imsg->data + sizeof(icapa) + icapa.key_len,
 722 00b3e9ae 2023-01-11 op 		    icapa.value_len);
 723 ae7c1b78 2023-01-10 stsp 		if (value == NULL) {
 724 ae7c1b78 2023-01-10 stsp 			free(key);
 725 00b3e9ae 2023-01-11 op 			return got_error_from_errno("strndup");
 726 ae7c1b78 2023-01-10 stsp 		}
 727 ae7c1b78 2023-01-10 stsp 	}
 728 ae7c1b78 2023-01-10 stsp 
 729 ae7c1b78 2023-01-10 stsp 	capa = &client->capabilities[client->ncapabilities++];
 730 ae7c1b78 2023-01-10 stsp 	capa->key = key;
 731 ae7c1b78 2023-01-10 stsp 	capa->value = value;
 732 ae7c1b78 2023-01-10 stsp 
 733 ae7c1b78 2023-01-10 stsp 	if (value)
 734 ae7c1b78 2023-01-10 stsp 		log_debug("uid %d: capability %s=%s", client->euid, key, value);
 735 ae7c1b78 2023-01-10 stsp 	else
 736 ae7c1b78 2023-01-10 stsp 		log_debug("uid %d: capability %s", client->euid, key);
 737 ae7c1b78 2023-01-10 stsp 
 738 ae7c1b78 2023-01-10 stsp 	return NULL;
 739 ae7c1b78 2023-01-10 stsp }
 740 ae7c1b78 2023-01-10 stsp 
 741 ae7c1b78 2023-01-10 stsp static const struct got_error *
 742 ae7c1b78 2023-01-10 stsp ensure_client_is_reading(struct gotd_session_client *client)
 743 ae7c1b78 2023-01-10 stsp {
 744 ae7c1b78 2023-01-10 stsp 	if (client->is_writing) {
 745 ae7c1b78 2023-01-10 stsp 		return got_error_fmt(GOT_ERR_BAD_PACKET,
 746 ae7c1b78 2023-01-10 stsp 		    "uid %d made a read-request but is not reading from "
 747 ae7c1b78 2023-01-10 stsp 		    "a repository", client->euid);
 748 ae7c1b78 2023-01-10 stsp 	}
 749 ae7c1b78 2023-01-10 stsp 
 750 ae7c1b78 2023-01-10 stsp 	return NULL;
 751 ae7c1b78 2023-01-10 stsp }
 752 ae7c1b78 2023-01-10 stsp 
 753 ae7c1b78 2023-01-10 stsp static const struct got_error *
 754 ae7c1b78 2023-01-10 stsp ensure_client_is_writing(struct gotd_session_client *client)
 755 ae7c1b78 2023-01-10 stsp {
 756 ae7c1b78 2023-01-10 stsp 	if (!client->is_writing) {
 757 ae7c1b78 2023-01-10 stsp 		return got_error_fmt(GOT_ERR_BAD_PACKET,
 758 ae7c1b78 2023-01-10 stsp 		    "uid %d made a write-request but is not writing to "
 759 ae7c1b78 2023-01-10 stsp 		    "a repository", client->euid);
 760 ae7c1b78 2023-01-10 stsp 	}
 761 ae7c1b78 2023-01-10 stsp 
 762 ae7c1b78 2023-01-10 stsp 	return NULL;
 763 ae7c1b78 2023-01-10 stsp }
 764 ae7c1b78 2023-01-10 stsp 
 765 ae7c1b78 2023-01-10 stsp static const struct got_error *
 766 ae7c1b78 2023-01-10 stsp forward_want(struct gotd_session_client *client, struct imsg *imsg)
 767 ae7c1b78 2023-01-10 stsp {
 768 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_want ireq;
 769 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_want iwant;
 770 ae7c1b78 2023-01-10 stsp 	size_t datalen;
 771 ae7c1b78 2023-01-10 stsp 
 772 ae7c1b78 2023-01-10 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 773 ae7c1b78 2023-01-10 stsp 	if (datalen != sizeof(ireq))
 774 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 775 ae7c1b78 2023-01-10 stsp 
 776 ae7c1b78 2023-01-10 stsp 	memcpy(&ireq, imsg->data, datalen);
 777 ae7c1b78 2023-01-10 stsp 
 778 ae7c1b78 2023-01-10 stsp 	memset(&iwant, 0, sizeof(iwant));
 779 ae7c1b78 2023-01-10 stsp 	memcpy(iwant.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
 780 ae7c1b78 2023-01-10 stsp 	iwant.client_id = client->id;
 781 ae7c1b78 2023-01-10 stsp 
 782 ae7c1b78 2023-01-10 stsp 	if (gotd_imsg_compose_event(&client->repo_child_iev, GOTD_IMSG_WANT,
 783 ae7c1b78 2023-01-10 stsp 	    PROC_SESSION, -1, &iwant, sizeof(iwant)) == -1)
 784 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("imsg compose WANT");
 785 ae7c1b78 2023-01-10 stsp 
 786 ae7c1b78 2023-01-10 stsp 	return NULL;
 787 ae7c1b78 2023-01-10 stsp }
 788 ae7c1b78 2023-01-10 stsp 
 789 ae7c1b78 2023-01-10 stsp static const struct got_error *
 790 ae7c1b78 2023-01-10 stsp forward_ref_update(struct gotd_session_client *client, struct imsg *imsg)
 791 ae7c1b78 2023-01-10 stsp {
 792 ae7c1b78 2023-01-10 stsp 	const struct got_error *err = NULL;
 793 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_ref_update ireq;
 794 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_ref_update *iref = NULL;
 795 ae7c1b78 2023-01-10 stsp 	size_t datalen;
 796 ae7c1b78 2023-01-10 stsp 
 797 ae7c1b78 2023-01-10 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 798 ae7c1b78 2023-01-10 stsp 	if (datalen < sizeof(ireq))
 799 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 800 ae7c1b78 2023-01-10 stsp 	memcpy(&ireq, imsg->data, sizeof(ireq));
 801 ae7c1b78 2023-01-10 stsp 	if (datalen != sizeof(ireq) + ireq.name_len)
 802 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 803 ae7c1b78 2023-01-10 stsp 
 804 ae7c1b78 2023-01-10 stsp 	iref = malloc(datalen);
 805 ae7c1b78 2023-01-10 stsp 	if (iref == NULL)
 806 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("malloc");
 807 ae7c1b78 2023-01-10 stsp 	memcpy(iref, imsg->data, datalen);
 808 ae7c1b78 2023-01-10 stsp 
 809 ae7c1b78 2023-01-10 stsp 	iref->client_id = client->id;
 810 ae7c1b78 2023-01-10 stsp 	if (gotd_imsg_compose_event(&client->repo_child_iev,
 811 ae7c1b78 2023-01-10 stsp 	    GOTD_IMSG_REF_UPDATE, PROC_SESSION, -1, iref, datalen) == -1)
 812 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("imsg compose REF_UPDATE");
 813 ae7c1b78 2023-01-10 stsp 	free(iref);
 814 ae7c1b78 2023-01-10 stsp 	return err;
 815 ae7c1b78 2023-01-10 stsp }
 816 ae7c1b78 2023-01-10 stsp 
 817 ae7c1b78 2023-01-10 stsp static const struct got_error *
 818 ae7c1b78 2023-01-10 stsp forward_have(struct gotd_session_client *client, struct imsg *imsg)
 819 ae7c1b78 2023-01-10 stsp {
 820 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_have ireq;
 821 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_have ihave;
 822 ae7c1b78 2023-01-10 stsp 	size_t datalen;
 823 ae7c1b78 2023-01-10 stsp 
 824 ae7c1b78 2023-01-10 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 825 ae7c1b78 2023-01-10 stsp 	if (datalen != sizeof(ireq))
 826 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 827 ae7c1b78 2023-01-10 stsp 
 828 ae7c1b78 2023-01-10 stsp 	memcpy(&ireq, imsg->data, datalen);
 829 ae7c1b78 2023-01-10 stsp 
 830 ae7c1b78 2023-01-10 stsp 	memset(&ihave, 0, sizeof(ihave));
 831 ae7c1b78 2023-01-10 stsp 	memcpy(ihave.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
 832 ae7c1b78 2023-01-10 stsp 	ihave.client_id = client->id;
 833 ae7c1b78 2023-01-10 stsp 
 834 ae7c1b78 2023-01-10 stsp 	if (gotd_imsg_compose_event(&client->repo_child_iev, GOTD_IMSG_HAVE,
 835 ae7c1b78 2023-01-10 stsp 	    PROC_SESSION, -1, &ihave, sizeof(ihave)) == -1)
 836 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("imsg compose HAVE");
 837 ae7c1b78 2023-01-10 stsp 
 838 ae7c1b78 2023-01-10 stsp 	return NULL;
 839 ae7c1b78 2023-01-10 stsp }
 840 ae7c1b78 2023-01-10 stsp 
 841 ae7c1b78 2023-01-10 stsp static int
 842 ae7c1b78 2023-01-10 stsp client_has_capability(struct gotd_session_client *client, const char *capastr)
 843 ae7c1b78 2023-01-10 stsp {
 844 ae7c1b78 2023-01-10 stsp 	struct gotd_client_capability *capa;
 845 ae7c1b78 2023-01-10 stsp 	size_t i;
 846 ae7c1b78 2023-01-10 stsp 
 847 ae7c1b78 2023-01-10 stsp 	if (client->ncapabilities == 0)
 848 ae7c1b78 2023-01-10 stsp 		return 0;
 849 ae7c1b78 2023-01-10 stsp 
 850 ae7c1b78 2023-01-10 stsp 	for (i = 0; i < client->ncapabilities; i++) {
 851 ae7c1b78 2023-01-10 stsp 		capa = &client->capabilities[i];
 852 ae7c1b78 2023-01-10 stsp 		if (strcmp(capa->key, capastr) == 0)
 853 ae7c1b78 2023-01-10 stsp 			return 1;
 854 ae7c1b78 2023-01-10 stsp 	}
 855 ae7c1b78 2023-01-10 stsp 
 856 ae7c1b78 2023-01-10 stsp 	return 0;
 857 ae7c1b78 2023-01-10 stsp }
 858 ae7c1b78 2023-01-10 stsp 
 859 ae7c1b78 2023-01-10 stsp static const struct got_error *
 860 ae7c1b78 2023-01-10 stsp recv_packfile(struct gotd_session_client *client)
 861 ae7c1b78 2023-01-10 stsp {
 862 ae7c1b78 2023-01-10 stsp 	const struct got_error *err = NULL;
 863 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_recv_packfile ipack;
 864 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_packfile_pipe ipipe;
 865 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_packidx_file ifile;
 866 ae7c1b78 2023-01-10 stsp 	char *basepath = NULL, *pack_path = NULL, *idx_path = NULL;
 867 ae7c1b78 2023-01-10 stsp 	int packfd = -1, idxfd = -1;
 868 ae7c1b78 2023-01-10 stsp 	int pipe[2] = { -1, -1 };
 869 ae7c1b78 2023-01-10 stsp 
 870 ae7c1b78 2023-01-10 stsp 	if (client->packfile_path) {
 871 ae7c1b78 2023-01-10 stsp 		return got_error_fmt(GOT_ERR_PRIVSEP_MSG,
 872 ae7c1b78 2023-01-10 stsp 		    "uid %d already has a pack file", client->euid);
 873 ae7c1b78 2023-01-10 stsp 	}
 874 ae7c1b78 2023-01-10 stsp 
 875 ae7c1b78 2023-01-10 stsp 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
 876 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("socketpair");
 877 ae7c1b78 2023-01-10 stsp 
 878 ae7c1b78 2023-01-10 stsp 	memset(&ipipe, 0, sizeof(ipipe));
 879 ae7c1b78 2023-01-10 stsp 	ipipe.client_id = client->id;
 880 ae7c1b78 2023-01-10 stsp 
 881 ae7c1b78 2023-01-10 stsp 	/* Send pack pipe end 0 to repo child process. */
 882 ae7c1b78 2023-01-10 stsp 	if (gotd_imsg_compose_event(&client->repo_child_iev,
 883 ae7c1b78 2023-01-10 stsp 	    GOTD_IMSG_PACKFILE_PIPE, PROC_SESSION, pipe[0],
 884 ae7c1b78 2023-01-10 stsp 	        &ipipe, sizeof(ipipe)) == -1) {
 885 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
 886 ae7c1b78 2023-01-10 stsp 		pipe[0] = -1;
 887 ae7c1b78 2023-01-10 stsp 		goto done;
 888 ae7c1b78 2023-01-10 stsp 	}
 889 ae7c1b78 2023-01-10 stsp 	pipe[0] = -1;
 890 ae7c1b78 2023-01-10 stsp 
 891 ae7c1b78 2023-01-10 stsp 	/* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
 892 ae7c1b78 2023-01-10 stsp 	if (gotd_imsg_compose_event(&client->iev,
 893 ae7c1b78 2023-01-10 stsp 	    GOTD_IMSG_PACKFILE_PIPE, PROC_SESSION, pipe[1], NULL, 0) == -1)
 894 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
 895 ae7c1b78 2023-01-10 stsp 	pipe[1] = -1;
 896 ae7c1b78 2023-01-10 stsp 
 897 ae7c1b78 2023-01-10 stsp 	if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.pack",
 898 ae7c1b78 2023-01-10 stsp 	    got_repo_get_path(gotd_session.repo), GOT_OBJECTS_PACK_DIR,
 899 ae7c1b78 2023-01-10 stsp 	    client->euid) == -1) {
 900 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("asprintf");
 901 ae7c1b78 2023-01-10 stsp 		goto done;
 902 ae7c1b78 2023-01-10 stsp 	}
 903 ae7c1b78 2023-01-10 stsp 
 904 ae7c1b78 2023-01-10 stsp 	err = got_opentemp_named_fd(&pack_path, &packfd, basepath, "");
 905 ae7c1b78 2023-01-10 stsp 	if (err)
 906 ae7c1b78 2023-01-10 stsp 		goto done;
 907 839bbaae 2023-02-01 op 	if (fchmod(packfd, GOT_DEFAULT_PACK_MODE) == -1) {
 908 839bbaae 2023-02-01 op 		err = got_error_from_errno2("fchmod", pack_path);
 909 839bbaae 2023-02-01 op 		goto done;
 910 839bbaae 2023-02-01 op 	}
 911 ae7c1b78 2023-01-10 stsp 
 912 ae7c1b78 2023-01-10 stsp 	free(basepath);
 913 ae7c1b78 2023-01-10 stsp 	if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.idx",
 914 ae7c1b78 2023-01-10 stsp 	    got_repo_get_path(gotd_session.repo), GOT_OBJECTS_PACK_DIR,
 915 ae7c1b78 2023-01-10 stsp 	    client->euid) == -1) {
 916 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("asprintf");
 917 ae7c1b78 2023-01-10 stsp 		basepath = NULL;
 918 ae7c1b78 2023-01-10 stsp 		goto done;
 919 ae7c1b78 2023-01-10 stsp 	}
 920 ae7c1b78 2023-01-10 stsp 	err = got_opentemp_named_fd(&idx_path, &idxfd, basepath, "");
 921 ae7c1b78 2023-01-10 stsp 	if (err)
 922 ae7c1b78 2023-01-10 stsp 		goto done;
 923 839bbaae 2023-02-01 op 	if (fchmod(idxfd, GOT_DEFAULT_PACK_MODE) == -1) {
 924 839bbaae 2023-02-01 op 		err = got_error_from_errno2("fchmod", idx_path);
 925 839bbaae 2023-02-01 op 		goto done;
 926 839bbaae 2023-02-01 op 	}
 927 ae7c1b78 2023-01-10 stsp 
 928 ae7c1b78 2023-01-10 stsp 	memset(&ifile, 0, sizeof(ifile));
 929 ae7c1b78 2023-01-10 stsp 	ifile.client_id = client->id;
 930 ae7c1b78 2023-01-10 stsp 	if (gotd_imsg_compose_event(&client->repo_child_iev,
 931 ae7c1b78 2023-01-10 stsp 	    GOTD_IMSG_PACKIDX_FILE, PROC_SESSION,
 932 ae7c1b78 2023-01-10 stsp 	    idxfd, &ifile, sizeof(ifile)) == -1) {
 933 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("imsg compose PACKIDX_FILE");
 934 ae7c1b78 2023-01-10 stsp 		idxfd = -1;
 935 ae7c1b78 2023-01-10 stsp 		goto done;
 936 ae7c1b78 2023-01-10 stsp 	}
 937 ae7c1b78 2023-01-10 stsp 	idxfd = -1;
 938 ae7c1b78 2023-01-10 stsp 
 939 ae7c1b78 2023-01-10 stsp 	memset(&ipack, 0, sizeof(ipack));
 940 ae7c1b78 2023-01-10 stsp 	ipack.client_id = client->id;
 941 ae7c1b78 2023-01-10 stsp 	if (client_has_capability(client, GOT_CAPA_REPORT_STATUS))
 942 ae7c1b78 2023-01-10 stsp 		ipack.report_status = 1;
 943 ae7c1b78 2023-01-10 stsp 
 944 ae7c1b78 2023-01-10 stsp 	if (gotd_imsg_compose_event(&client->repo_child_iev,
 945 ae7c1b78 2023-01-10 stsp 	    GOTD_IMSG_RECV_PACKFILE, PROC_SESSION, packfd,
 946 ae7c1b78 2023-01-10 stsp 	    &ipack, sizeof(ipack)) == -1) {
 947 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("imsg compose RECV_PACKFILE");
 948 ae7c1b78 2023-01-10 stsp 		packfd = -1;
 949 ae7c1b78 2023-01-10 stsp 		goto done;
 950 ae7c1b78 2023-01-10 stsp 	}
 951 ae7c1b78 2023-01-10 stsp 	packfd = -1;
 952 ae7c1b78 2023-01-10 stsp 
 953 ae7c1b78 2023-01-10 stsp done:
 954 ae7c1b78 2023-01-10 stsp 	free(basepath);
 955 ae7c1b78 2023-01-10 stsp 	if (pipe[0] != -1 && close(pipe[0]) == -1 && err == NULL)
 956 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("close");
 957 ae7c1b78 2023-01-10 stsp 	if (pipe[1] != -1 && close(pipe[1]) == -1 && err == NULL)
 958 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("close");
 959 ae7c1b78 2023-01-10 stsp 	if (packfd != -1 && close(packfd) == -1 && err == NULL)
 960 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("close");
 961 ae7c1b78 2023-01-10 stsp 	if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
 962 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("close");
 963 ae7c1b78 2023-01-10 stsp 	if (err) {
 964 ae7c1b78 2023-01-10 stsp 		free(pack_path);
 965 ae7c1b78 2023-01-10 stsp 		free(idx_path);
 966 ae7c1b78 2023-01-10 stsp 	} else {
 967 ae7c1b78 2023-01-10 stsp 		client->packfile_path = pack_path;
 968 ae7c1b78 2023-01-10 stsp 		client->packidx_path = idx_path;
 969 ae7c1b78 2023-01-10 stsp 	}
 970 ae7c1b78 2023-01-10 stsp 	return err;
 971 ae7c1b78 2023-01-10 stsp }
 972 ae7c1b78 2023-01-10 stsp 
 973 ae7c1b78 2023-01-10 stsp static const struct got_error *
 974 ae7c1b78 2023-01-10 stsp send_packfile(struct gotd_session_client *client)
 975 ae7c1b78 2023-01-10 stsp {
 976 ae7c1b78 2023-01-10 stsp 	const struct got_error *err = NULL;
 977 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_send_packfile ipack;
 978 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_packfile_pipe ipipe;
 979 ae7c1b78 2023-01-10 stsp 	int pipe[2];
 980 ae7c1b78 2023-01-10 stsp 
 981 ae7c1b78 2023-01-10 stsp 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
 982 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("socketpair");
 983 ae7c1b78 2023-01-10 stsp 
 984 ae7c1b78 2023-01-10 stsp 	memset(&ipack, 0, sizeof(ipack));
 985 ae7c1b78 2023-01-10 stsp 	memset(&ipipe, 0, sizeof(ipipe));
 986 ae7c1b78 2023-01-10 stsp 
 987 ae7c1b78 2023-01-10 stsp 	ipack.client_id = client->id;
 988 ae7c1b78 2023-01-10 stsp 	if (client_has_capability(client, GOT_CAPA_SIDE_BAND_64K))
 989 ae7c1b78 2023-01-10 stsp 		ipack.report_progress = 1;
 990 ae7c1b78 2023-01-10 stsp 
 991 ae7c1b78 2023-01-10 stsp 	client->delta_cache_fd = got_opentempfd();
 992 ae7c1b78 2023-01-10 stsp 	if (client->delta_cache_fd == -1)
 993 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("got_opentempfd");
 994 ae7c1b78 2023-01-10 stsp 
 995 ae7c1b78 2023-01-10 stsp 	if (gotd_imsg_compose_event(&client->repo_child_iev,
 996 ae7c1b78 2023-01-10 stsp 	    GOTD_IMSG_SEND_PACKFILE, PROC_GOTD, client->delta_cache_fd,
 997 ae7c1b78 2023-01-10 stsp 	    &ipack, sizeof(ipack)) == -1) {
 998 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("imsg compose SEND_PACKFILE");
 999 ae7c1b78 2023-01-10 stsp 		close(pipe[0]);
1000 ae7c1b78 2023-01-10 stsp 		close(pipe[1]);
1001 ae7c1b78 2023-01-10 stsp 		return err;
1002 ae7c1b78 2023-01-10 stsp 	}
1003 ae7c1b78 2023-01-10 stsp 
1004 ae7c1b78 2023-01-10 stsp 	ipipe.client_id = client->id;
1005 ae7c1b78 2023-01-10 stsp 
1006 ae7c1b78 2023-01-10 stsp 	/* Send pack pipe end 0 to repo child process. */
1007 ae7c1b78 2023-01-10 stsp 	if (gotd_imsg_compose_event(&client->repo_child_iev,
1008 ae7c1b78 2023-01-10 stsp 	    GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD,
1009 ae7c1b78 2023-01-10 stsp 	    pipe[0], &ipipe, sizeof(ipipe)) == -1) {
1010 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
1011 ae7c1b78 2023-01-10 stsp 		close(pipe[1]);
1012 ae7c1b78 2023-01-10 stsp 		return err;
1013 ae7c1b78 2023-01-10 stsp 	}
1014 ae7c1b78 2023-01-10 stsp 
1015 ae7c1b78 2023-01-10 stsp 	/* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
1016 ae7c1b78 2023-01-10 stsp 	if (gotd_imsg_compose_event(&client->iev,
1017 ae7c1b78 2023-01-10 stsp 	    GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
1018 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
1019 ae7c1b78 2023-01-10 stsp 
1020 ae7c1b78 2023-01-10 stsp 	return err;
1021 ae7c1b78 2023-01-10 stsp }
1022 ae7c1b78 2023-01-10 stsp 
1023 ae7c1b78 2023-01-10 stsp static void
1024 3931a8a4 2023-02-03 stsp session_dispatch_client(int fd, short events, void *arg)
1025 ae7c1b78 2023-01-10 stsp {
1026 ae7c1b78 2023-01-10 stsp 	struct gotd_imsgev *iev = arg;
1027 ae7c1b78 2023-01-10 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
1028 ae7c1b78 2023-01-10 stsp 	struct gotd_session_client *client = &gotd_session_client;
1029 ae7c1b78 2023-01-10 stsp 	const struct got_error *err = NULL;
1030 ae7c1b78 2023-01-10 stsp 	struct imsg imsg;
1031 ae7c1b78 2023-01-10 stsp 	ssize_t n;
1032 ae7c1b78 2023-01-10 stsp 
1033 ae7c1b78 2023-01-10 stsp 	if (events & EV_WRITE) {
1034 ae7c1b78 2023-01-10 stsp 		while (ibuf->w.queued) {
1035 ae7c1b78 2023-01-10 stsp 			n = msgbuf_write(&ibuf->w);
1036 ae7c1b78 2023-01-10 stsp 			if (n == -1 && errno == EPIPE) {
1037 ae7c1b78 2023-01-10 stsp 				/*
1038 ae7c1b78 2023-01-10 stsp 				 * The client has closed its socket.
1039 ae7c1b78 2023-01-10 stsp 				 * This can happen when Git clients are
1040 ae7c1b78 2023-01-10 stsp 				 * done sending pack file data.
1041 ae7c1b78 2023-01-10 stsp 				 */
1042 ae7c1b78 2023-01-10 stsp 				msgbuf_clear(&ibuf->w);
1043 ae7c1b78 2023-01-10 stsp 				continue;
1044 ae7c1b78 2023-01-10 stsp 			} else if (n == -1 && errno != EAGAIN) {
1045 ae7c1b78 2023-01-10 stsp 				err = got_error_from_errno("imsg_flush");
1046 ae7c1b78 2023-01-10 stsp 				disconnect_on_error(client, err);
1047 ae7c1b78 2023-01-10 stsp 				return;
1048 ae7c1b78 2023-01-10 stsp 			}
1049 ae7c1b78 2023-01-10 stsp 			if (n == 0) {
1050 ae7c1b78 2023-01-10 stsp 				/* Connection closed. */
1051 ae7c1b78 2023-01-10 stsp 				err = got_error(GOT_ERR_EOF);
1052 ae7c1b78 2023-01-10 stsp 				disconnect_on_error(client, err);
1053 ae7c1b78 2023-01-10 stsp 				return;
1054 ae7c1b78 2023-01-10 stsp 			}
1055 ae7c1b78 2023-01-10 stsp 		}
1056 ae7c1b78 2023-01-10 stsp 	}
1057 ae7c1b78 2023-01-10 stsp 
1058 ae7c1b78 2023-01-10 stsp 	if ((events & EV_READ) == 0)
1059 ae7c1b78 2023-01-10 stsp 		return;
1060 ae7c1b78 2023-01-10 stsp 
1061 ae7c1b78 2023-01-10 stsp 	memset(&imsg, 0, sizeof(imsg));
1062 ae7c1b78 2023-01-10 stsp 
1063 ae7c1b78 2023-01-10 stsp 	while (err == NULL) {
1064 ae7c1b78 2023-01-10 stsp 		err = gotd_imsg_recv(&imsg, ibuf, 0);
1065 ae7c1b78 2023-01-10 stsp 		if (err) {
1066 ae7c1b78 2023-01-10 stsp 			if (err->code == GOT_ERR_PRIVSEP_READ)
1067 ae7c1b78 2023-01-10 stsp 				err = NULL;
1068 baaae615 2023-06-07 stsp 			else if (err->code == GOT_ERR_EOF &&
1069 baaae615 2023-06-07 stsp 			    client->state == GOTD_STATE_EXPECT_CAPABILITIES) {
1070 baaae615 2023-06-07 stsp 				/*
1071 baaae615 2023-06-07 stsp 				 * The client has closed its socket before
1072 baaae615 2023-06-07 stsp 				 * sending its capability announcement.
1073 baaae615 2023-06-07 stsp 				 * This can happen when Git clients have
1074 baaae615 2023-06-07 stsp 				 * no ref-updates to send.
1075 baaae615 2023-06-07 stsp 				 */
1076 baaae615 2023-06-07 stsp 				disconnect_on_error(client, err);
1077 baaae615 2023-06-07 stsp 				return;
1078 baaae615 2023-06-07 stsp 			}
1079 ae7c1b78 2023-01-10 stsp 			break;
1080 ae7c1b78 2023-01-10 stsp 		}
1081 ae7c1b78 2023-01-10 stsp 
1082 ae7c1b78 2023-01-10 stsp 		evtimer_del(&client->tmo);
1083 ae7c1b78 2023-01-10 stsp 
1084 ae7c1b78 2023-01-10 stsp 		switch (imsg.hdr.type) {
1085 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_CAPABILITIES:
1086 ae7c1b78 2023-01-10 stsp 			if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1087 ae7c1b78 2023-01-10 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1088 ae7c1b78 2023-01-10 stsp 				    "unexpected capabilities received");
1089 ae7c1b78 2023-01-10 stsp 				break;
1090 ae7c1b78 2023-01-10 stsp 			}
1091 ae7c1b78 2023-01-10 stsp 			log_debug("receiving capabilities from uid %d",
1092 ae7c1b78 2023-01-10 stsp 			    client->euid);
1093 ae7c1b78 2023-01-10 stsp 			err = recv_capabilities(client, &imsg);
1094 ae7c1b78 2023-01-10 stsp 			break;
1095 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_CAPABILITY:
1096 ae7c1b78 2023-01-10 stsp 			if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1097 ae7c1b78 2023-01-10 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1098 ae7c1b78 2023-01-10 stsp 				    "unexpected capability received");
1099 ae7c1b78 2023-01-10 stsp 				break;
1100 ae7c1b78 2023-01-10 stsp 			}
1101 ae7c1b78 2023-01-10 stsp 			err = recv_capability(client, &imsg);
1102 ae7c1b78 2023-01-10 stsp 			if (err || client->ncapabilities < client->ncapa_alloc)
1103 ae7c1b78 2023-01-10 stsp 				break;
1104 ae7c1b78 2023-01-10 stsp 			if (!client->is_writing) {
1105 ae7c1b78 2023-01-10 stsp 				client->state = GOTD_STATE_EXPECT_WANT;
1106 3448a19a 2023-01-21 stsp 				client->accept_flush_pkt = 1;
1107 ae7c1b78 2023-01-10 stsp 				log_debug("uid %d: expecting want-lines",
1108 ae7c1b78 2023-01-10 stsp 				    client->euid);
1109 ae7c1b78 2023-01-10 stsp 			} else if (client->is_writing) {
1110 ae7c1b78 2023-01-10 stsp 				client->state = GOTD_STATE_EXPECT_REF_UPDATE;
1111 3448a19a 2023-01-21 stsp 				client->accept_flush_pkt = 1;
1112 ae7c1b78 2023-01-10 stsp 				log_debug("uid %d: expecting ref-update-lines",
1113 ae7c1b78 2023-01-10 stsp 				    client->euid);
1114 ae7c1b78 2023-01-10 stsp 			} else
1115 ae7c1b78 2023-01-10 stsp 				fatalx("client %d is both reading and writing",
1116 ae7c1b78 2023-01-10 stsp 				    client->euid);
1117 ae7c1b78 2023-01-10 stsp 			break;
1118 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_WANT:
1119 ae7c1b78 2023-01-10 stsp 			if (client->state != GOTD_STATE_EXPECT_WANT) {
1120 ae7c1b78 2023-01-10 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1121 ae7c1b78 2023-01-10 stsp 				    "unexpected want-line received");
1122 ae7c1b78 2023-01-10 stsp 				break;
1123 ae7c1b78 2023-01-10 stsp 			}
1124 ae7c1b78 2023-01-10 stsp 			log_debug("received want-line from uid %d",
1125 ae7c1b78 2023-01-10 stsp 			    client->euid);
1126 ae7c1b78 2023-01-10 stsp 			err = ensure_client_is_reading(client);
1127 ae7c1b78 2023-01-10 stsp 			if (err)
1128 ae7c1b78 2023-01-10 stsp 				break;
1129 3448a19a 2023-01-21 stsp 			client->accept_flush_pkt = 1;
1130 ae7c1b78 2023-01-10 stsp 			err = forward_want(client, &imsg);
1131 ae7c1b78 2023-01-10 stsp 			break;
1132 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_REF_UPDATE:
1133 6da1c69c 2023-01-18 stsp 			if (client->state != GOTD_STATE_EXPECT_REF_UPDATE &&
1134 6da1c69c 2023-01-18 stsp 			    client->state !=
1135 6da1c69c 2023-01-18 stsp 			    GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1136 ae7c1b78 2023-01-10 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1137 ae7c1b78 2023-01-10 stsp 				    "unexpected ref-update-line received");
1138 ae7c1b78 2023-01-10 stsp 				break;
1139 ae7c1b78 2023-01-10 stsp 			}
1140 ae7c1b78 2023-01-10 stsp 			log_debug("received ref-update-line from uid %d",
1141 ae7c1b78 2023-01-10 stsp 			    client->euid);
1142 ae7c1b78 2023-01-10 stsp 			err = ensure_client_is_writing(client);
1143 ae7c1b78 2023-01-10 stsp 			if (err)
1144 ae7c1b78 2023-01-10 stsp 				break;
1145 ae7c1b78 2023-01-10 stsp 			err = forward_ref_update(client, &imsg);
1146 ae7c1b78 2023-01-10 stsp 			if (err)
1147 ae7c1b78 2023-01-10 stsp 				break;
1148 ae7c1b78 2023-01-10 stsp 			client->state = GOTD_STATE_EXPECT_MORE_REF_UPDATES;
1149 3448a19a 2023-01-21 stsp 			client->accept_flush_pkt = 1;
1150 ae7c1b78 2023-01-10 stsp 			break;
1151 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_HAVE:
1152 ae7c1b78 2023-01-10 stsp 			if (client->state != GOTD_STATE_EXPECT_HAVE) {
1153 ae7c1b78 2023-01-10 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1154 ae7c1b78 2023-01-10 stsp 				    "unexpected have-line received");
1155 ae7c1b78 2023-01-10 stsp 				break;
1156 ae7c1b78 2023-01-10 stsp 			}
1157 ae7c1b78 2023-01-10 stsp 			log_debug("received have-line from uid %d",
1158 ae7c1b78 2023-01-10 stsp 			    client->euid);
1159 ae7c1b78 2023-01-10 stsp 			err = ensure_client_is_reading(client);
1160 ae7c1b78 2023-01-10 stsp 			if (err)
1161 ae7c1b78 2023-01-10 stsp 				break;
1162 ae7c1b78 2023-01-10 stsp 			err = forward_have(client, &imsg);
1163 ae7c1b78 2023-01-10 stsp 			if (err)
1164 ae7c1b78 2023-01-10 stsp 				break;
1165 3448a19a 2023-01-21 stsp 			client->accept_flush_pkt = 1;
1166 ae7c1b78 2023-01-10 stsp 			break;
1167 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_FLUSH:
1168 ae7c1b78 2023-01-10 stsp 			if (client->state == GOTD_STATE_EXPECT_WANT ||
1169 ae7c1b78 2023-01-10 stsp 			    client->state == GOTD_STATE_EXPECT_HAVE) {
1170 ae7c1b78 2023-01-10 stsp 				err = ensure_client_is_reading(client);
1171 ae7c1b78 2023-01-10 stsp 				if (err)
1172 ae7c1b78 2023-01-10 stsp 					break;
1173 ae7c1b78 2023-01-10 stsp 			} else if (client->state ==
1174 ae7c1b78 2023-01-10 stsp 			    GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1175 ae7c1b78 2023-01-10 stsp 				err = ensure_client_is_writing(client);
1176 ae7c1b78 2023-01-10 stsp 				if (err)
1177 ae7c1b78 2023-01-10 stsp 					break;
1178 f9550d47 2023-01-18 stsp 			} else if (client->state != GOTD_STATE_EXPECT_DONE) {
1179 3448a19a 2023-01-21 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1180 3448a19a 2023-01-21 stsp 				    "unexpected flush-pkt received");
1181 3448a19a 2023-01-21 stsp 				break;
1182 3448a19a 2023-01-21 stsp 			}
1183 3448a19a 2023-01-21 stsp 			if (!client->accept_flush_pkt) {
1184 ae7c1b78 2023-01-10 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1185 ae7c1b78 2023-01-10 stsp 				    "unexpected flush-pkt received");
1186 ae7c1b78 2023-01-10 stsp 				break;
1187 ae7c1b78 2023-01-10 stsp 			}
1188 3448a19a 2023-01-21 stsp 
1189 3448a19a 2023-01-21 stsp 			/*
1190 3448a19a 2023-01-21 stsp 			 * Accept just one flush packet at a time.
1191 3448a19a 2023-01-21 stsp 			 * Future client state transitions will set this flag
1192 3448a19a 2023-01-21 stsp 			 * again if another flush packet is expected.
1193 3448a19a 2023-01-21 stsp 			 */
1194 3448a19a 2023-01-21 stsp 			client->accept_flush_pkt = 0;
1195 3448a19a 2023-01-21 stsp 
1196 ae7c1b78 2023-01-10 stsp 			log_debug("received flush-pkt from uid %d",
1197 ae7c1b78 2023-01-10 stsp 			    client->euid);
1198 ae7c1b78 2023-01-10 stsp 			if (client->state == GOTD_STATE_EXPECT_WANT) {
1199 ae7c1b78 2023-01-10 stsp 				client->state = GOTD_STATE_EXPECT_HAVE;
1200 ae7c1b78 2023-01-10 stsp 				log_debug("uid %d: expecting have-lines",
1201 ae7c1b78 2023-01-10 stsp 				    client->euid);
1202 ae7c1b78 2023-01-10 stsp 			} else if (client->state == GOTD_STATE_EXPECT_HAVE) {
1203 ae7c1b78 2023-01-10 stsp 				client->state = GOTD_STATE_EXPECT_DONE;
1204 3448a19a 2023-01-21 stsp 				client->accept_flush_pkt = 1;
1205 ae7c1b78 2023-01-10 stsp 				log_debug("uid %d: expecting 'done'",
1206 ae7c1b78 2023-01-10 stsp 				    client->euid);
1207 ae7c1b78 2023-01-10 stsp 			} else if (client->state ==
1208 ae7c1b78 2023-01-10 stsp 			    GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1209 ae7c1b78 2023-01-10 stsp 				client->state = GOTD_STATE_EXPECT_PACKFILE;
1210 ae7c1b78 2023-01-10 stsp 				log_debug("uid %d: expecting packfile",
1211 ae7c1b78 2023-01-10 stsp 				    client->euid);
1212 ae7c1b78 2023-01-10 stsp 				err = recv_packfile(client);
1213 f9550d47 2023-01-18 stsp 			} else if (client->state != GOTD_STATE_EXPECT_DONE) {
1214 ae7c1b78 2023-01-10 stsp 				/* should not happen, see above */
1215 ae7c1b78 2023-01-10 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1216 ae7c1b78 2023-01-10 stsp 				    "unexpected client state");
1217 ae7c1b78 2023-01-10 stsp 				break;
1218 ae7c1b78 2023-01-10 stsp 			}
1219 ae7c1b78 2023-01-10 stsp 			break;
1220 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_DONE:
1221 ae7c1b78 2023-01-10 stsp 			if (client->state != GOTD_STATE_EXPECT_HAVE &&
1222 ae7c1b78 2023-01-10 stsp 			    client->state != GOTD_STATE_EXPECT_DONE) {
1223 ae7c1b78 2023-01-10 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1224 ae7c1b78 2023-01-10 stsp 				    "unexpected flush-pkt received");
1225 ae7c1b78 2023-01-10 stsp 				break;
1226 ae7c1b78 2023-01-10 stsp 			}
1227 ae7c1b78 2023-01-10 stsp 			log_debug("received 'done' from uid %d", client->euid);
1228 ae7c1b78 2023-01-10 stsp 			err = ensure_client_is_reading(client);
1229 ae7c1b78 2023-01-10 stsp 			if (err)
1230 ae7c1b78 2023-01-10 stsp 				break;
1231 ae7c1b78 2023-01-10 stsp 			client->state = GOTD_STATE_DONE;
1232 3448a19a 2023-01-21 stsp 			client->accept_flush_pkt = 1;
1233 ae7c1b78 2023-01-10 stsp 			err = send_packfile(client);
1234 ae7c1b78 2023-01-10 stsp 			break;
1235 ae7c1b78 2023-01-10 stsp 		default:
1236 ae7c1b78 2023-01-10 stsp 			log_debug("unexpected imsg %d", imsg.hdr.type);
1237 ae7c1b78 2023-01-10 stsp 			err = got_error(GOT_ERR_PRIVSEP_MSG);
1238 ae7c1b78 2023-01-10 stsp 			break;
1239 ae7c1b78 2023-01-10 stsp 		}
1240 ae7c1b78 2023-01-10 stsp 
1241 ae7c1b78 2023-01-10 stsp 		imsg_free(&imsg);
1242 ae7c1b78 2023-01-10 stsp 	}
1243 ae7c1b78 2023-01-10 stsp 
1244 ae7c1b78 2023-01-10 stsp 	if (err) {
1245 ae7c1b78 2023-01-10 stsp 		if (err->code != GOT_ERR_EOF ||
1246 ae7c1b78 2023-01-10 stsp 		    client->state != GOTD_STATE_EXPECT_PACKFILE)
1247 ae7c1b78 2023-01-10 stsp 			disconnect_on_error(client, err);
1248 ae7c1b78 2023-01-10 stsp 	} else {
1249 ae7c1b78 2023-01-10 stsp 		gotd_imsg_event_add(iev);
1250 ae7c1b78 2023-01-10 stsp 		evtimer_add(&client->tmo, &gotd_session.request_timeout);
1251 ae7c1b78 2023-01-10 stsp 	}
1252 ae7c1b78 2023-01-10 stsp }
1253 ae7c1b78 2023-01-10 stsp 
1254 ae7c1b78 2023-01-10 stsp static const struct got_error *
1255 ae7c1b78 2023-01-10 stsp list_refs_request(void)
1256 ae7c1b78 2023-01-10 stsp {
1257 ae7c1b78 2023-01-10 stsp 	static const struct got_error *err;
1258 ae7c1b78 2023-01-10 stsp 	struct gotd_session_client *client = &gotd_session_client;
1259 ae7c1b78 2023-01-10 stsp 	struct gotd_imsgev *iev = &client->repo_child_iev;
1260 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_list_refs_internal ilref;
1261 ae7c1b78 2023-01-10 stsp 	int fd;
1262 ae7c1b78 2023-01-10 stsp 
1263 ae7c1b78 2023-01-10 stsp 	if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1264 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1265 ae7c1b78 2023-01-10 stsp 
1266 ae7c1b78 2023-01-10 stsp 	memset(&ilref, 0, sizeof(ilref));
1267 ae7c1b78 2023-01-10 stsp 	ilref.client_id = client->id;
1268 ae7c1b78 2023-01-10 stsp 
1269 ae7c1b78 2023-01-10 stsp 	fd = dup(client->fd);
1270 ae7c1b78 2023-01-10 stsp 	if (fd == -1)
1271 ae7c1b78 2023-01-10 stsp 		return got_error_from_errno("dup");
1272 ae7c1b78 2023-01-10 stsp 
1273 ae7c1b78 2023-01-10 stsp 	if (gotd_imsg_compose_event(iev, GOTD_IMSG_LIST_REFS_INTERNAL,
1274 ae7c1b78 2023-01-10 stsp 	    PROC_SESSION, fd, &ilref, sizeof(ilref)) == -1) {
1275 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("imsg compose LIST_REFS_INTERNAL");
1276 ae7c1b78 2023-01-10 stsp 		close(fd);
1277 ae7c1b78 2023-01-10 stsp 		return err;
1278 ae7c1b78 2023-01-10 stsp 	}
1279 ae7c1b78 2023-01-10 stsp 
1280 ae7c1b78 2023-01-10 stsp 	client->state = GOTD_STATE_EXPECT_CAPABILITIES;
1281 ae7c1b78 2023-01-10 stsp 	log_debug("uid %d: expecting capabilities", client->euid);
1282 ae7c1b78 2023-01-10 stsp 	return NULL;
1283 ae7c1b78 2023-01-10 stsp }
1284 ae7c1b78 2023-01-10 stsp 
1285 ae7c1b78 2023-01-10 stsp static const struct got_error *
1286 ae7c1b78 2023-01-10 stsp recv_connect(struct imsg *imsg)
1287 ae7c1b78 2023-01-10 stsp {
1288 ae7c1b78 2023-01-10 stsp 	struct gotd_session_client *client = &gotd_session_client;
1289 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_connect iconnect;
1290 ae7c1b78 2023-01-10 stsp 	size_t datalen;
1291 ae7c1b78 2023-01-10 stsp 
1292 ae7c1b78 2023-01-10 stsp 	if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1293 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1294 ae7c1b78 2023-01-10 stsp 
1295 ae7c1b78 2023-01-10 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1296 ae7c1b78 2023-01-10 stsp 	if (datalen != sizeof(iconnect))
1297 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1298 ae7c1b78 2023-01-10 stsp 	memcpy(&iconnect, imsg->data, sizeof(iconnect));
1299 ae7c1b78 2023-01-10 stsp 
1300 ae7c1b78 2023-01-10 stsp 	if (imsg->fd == -1)
1301 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
1302 ae7c1b78 2023-01-10 stsp 
1303 ae7c1b78 2023-01-10 stsp 	client->fd = imsg->fd;
1304 ae7c1b78 2023-01-10 stsp 	client->euid = iconnect.euid;
1305 ae7c1b78 2023-01-10 stsp 	client->egid = iconnect.egid;
1306 ae7c1b78 2023-01-10 stsp 
1307 ae7c1b78 2023-01-10 stsp 	imsg_init(&client->iev.ibuf, client->fd);
1308 3931a8a4 2023-02-03 stsp 	client->iev.handler = session_dispatch_client;
1309 ae7c1b78 2023-01-10 stsp 	client->iev.events = EV_READ;
1310 ae7c1b78 2023-01-10 stsp 	client->iev.handler_arg = NULL;
1311 ae7c1b78 2023-01-10 stsp 	event_set(&client->iev.ev, client->iev.ibuf.fd, EV_READ,
1312 3931a8a4 2023-02-03 stsp 	    session_dispatch_client, &client->iev);
1313 ae7c1b78 2023-01-10 stsp 	gotd_imsg_event_add(&client->iev);
1314 ae7c1b78 2023-01-10 stsp 	evtimer_set(&client->tmo, gotd_request_timeout, client);
1315 ae7c1b78 2023-01-10 stsp 
1316 ae7c1b78 2023-01-10 stsp 	return NULL;
1317 ae7c1b78 2023-01-10 stsp }
1318 ae7c1b78 2023-01-10 stsp 
1319 ae7c1b78 2023-01-10 stsp static const struct got_error *
1320 ae7c1b78 2023-01-10 stsp recv_repo_child(struct imsg *imsg)
1321 ae7c1b78 2023-01-10 stsp {
1322 ae7c1b78 2023-01-10 stsp 	struct gotd_imsg_connect_repo_child ichild;
1323 ae7c1b78 2023-01-10 stsp 	struct gotd_session_client *client = &gotd_session_client;
1324 ae7c1b78 2023-01-10 stsp 	size_t datalen;
1325 ae7c1b78 2023-01-10 stsp 
1326 ae7c1b78 2023-01-10 stsp 	if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1327 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1328 ae7c1b78 2023-01-10 stsp 
1329 ae7c1b78 2023-01-10 stsp 	/* We should already have received a pipe to the listener. */
1330 ae7c1b78 2023-01-10 stsp 	if (client->fd == -1)
1331 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1332 ae7c1b78 2023-01-10 stsp 
1333 ae7c1b78 2023-01-10 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1334 ae7c1b78 2023-01-10 stsp 	if (datalen != sizeof(ichild))
1335 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1336 ae7c1b78 2023-01-10 stsp 
1337 ae7c1b78 2023-01-10 stsp 	memcpy(&ichild, imsg->data, sizeof(ichild));
1338 ae7c1b78 2023-01-10 stsp 
1339 ae7c1b78 2023-01-10 stsp 	client->id = ichild.client_id;
1340 ae7c1b78 2023-01-10 stsp 	if (ichild.proc_id == PROC_REPO_WRITE)
1341 ae7c1b78 2023-01-10 stsp 		client->is_writing = 1;
1342 ae7c1b78 2023-01-10 stsp 	else if (ichild.proc_id == PROC_REPO_READ)
1343 ae7c1b78 2023-01-10 stsp 		client->is_writing = 0;
1344 ae7c1b78 2023-01-10 stsp 	else
1345 ae7c1b78 2023-01-10 stsp 		return got_error_msg(GOT_ERR_PRIVSEP_MSG,
1346 ae7c1b78 2023-01-10 stsp 		    "bad child process type");
1347 da76b651 2023-02-03 mark 
1348 ae7c1b78 2023-01-10 stsp 	if (imsg->fd == -1)
1349 ae7c1b78 2023-01-10 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
1350 ae7c1b78 2023-01-10 stsp 
1351 ae7c1b78 2023-01-10 stsp 	imsg_init(&client->repo_child_iev.ibuf, imsg->fd);
1352 ae7c1b78 2023-01-10 stsp 	client->repo_child_iev.handler = session_dispatch_repo_child;
1353 ae7c1b78 2023-01-10 stsp 	client->repo_child_iev.events = EV_READ;
1354 ae7c1b78 2023-01-10 stsp 	client->repo_child_iev.handler_arg = NULL;
1355 ae7c1b78 2023-01-10 stsp 	event_set(&client->repo_child_iev.ev, client->repo_child_iev.ibuf.fd,
1356 ae7c1b78 2023-01-10 stsp 	    EV_READ, session_dispatch_repo_child, &client->repo_child_iev);
1357 ae7c1b78 2023-01-10 stsp 	gotd_imsg_event_add(&client->repo_child_iev);
1358 ae7c1b78 2023-01-10 stsp 
1359 ae7c1b78 2023-01-10 stsp 	/* The "recvfd" pledge promise is no longer needed. */
1360 ae7c1b78 2023-01-10 stsp 	if (pledge("stdio rpath wpath cpath sendfd fattr flock", NULL) == -1)
1361 ae7c1b78 2023-01-10 stsp 		fatal("pledge");
1362 ae7c1b78 2023-01-10 stsp 
1363 ae7c1b78 2023-01-10 stsp 	return NULL;
1364 ae7c1b78 2023-01-10 stsp }
1365 ae7c1b78 2023-01-10 stsp 
1366 ae7c1b78 2023-01-10 stsp static void
1367 ae7c1b78 2023-01-10 stsp session_dispatch(int fd, short event, void *arg)
1368 ae7c1b78 2023-01-10 stsp {
1369 ae7c1b78 2023-01-10 stsp 	struct gotd_imsgev *iev = arg;
1370 ae7c1b78 2023-01-10 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
1371 ae7c1b78 2023-01-10 stsp 	struct gotd_session_client *client = &gotd_session_client;
1372 ae7c1b78 2023-01-10 stsp 	ssize_t n;
1373 ae7c1b78 2023-01-10 stsp 	int shut = 0;
1374 ae7c1b78 2023-01-10 stsp 	struct imsg imsg;
1375 ae7c1b78 2023-01-10 stsp 
1376 ae7c1b78 2023-01-10 stsp 	if (event & EV_READ) {
1377 ae7c1b78 2023-01-10 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1378 ae7c1b78 2023-01-10 stsp 			fatal("imsg_read error");
1379 ae7c1b78 2023-01-10 stsp 		if (n == 0) {
1380 ae7c1b78 2023-01-10 stsp 			/* Connection closed. */
1381 ae7c1b78 2023-01-10 stsp 			shut = 1;
1382 ae7c1b78 2023-01-10 stsp 			goto done;
1383 ae7c1b78 2023-01-10 stsp 		}
1384 ae7c1b78 2023-01-10 stsp 	}
1385 ae7c1b78 2023-01-10 stsp 
1386 ae7c1b78 2023-01-10 stsp 	if (event & EV_WRITE) {
1387 ae7c1b78 2023-01-10 stsp 		n = msgbuf_write(&ibuf->w);
1388 ae7c1b78 2023-01-10 stsp 		if (n == -1 && errno != EAGAIN)
1389 ae7c1b78 2023-01-10 stsp 			fatal("msgbuf_write");
1390 ae7c1b78 2023-01-10 stsp 		if (n == 0) {
1391 ae7c1b78 2023-01-10 stsp 			/* Connection closed. */
1392 ae7c1b78 2023-01-10 stsp 			shut = 1;
1393 ae7c1b78 2023-01-10 stsp 			goto done;
1394 ae7c1b78 2023-01-10 stsp 		}
1395 ae7c1b78 2023-01-10 stsp 	}
1396 ae7c1b78 2023-01-10 stsp 
1397 ae7c1b78 2023-01-10 stsp 	for (;;) {
1398 ae7c1b78 2023-01-10 stsp 		const struct got_error *err = NULL;
1399 ae7c1b78 2023-01-10 stsp 		uint32_t client_id = 0;
1400 ae7c1b78 2023-01-10 stsp 		int do_disconnect = 0, do_list_refs = 0;
1401 ae7c1b78 2023-01-10 stsp 
1402 ae7c1b78 2023-01-10 stsp 		if ((n = imsg_get(ibuf, &imsg)) == -1)
1403 ae7c1b78 2023-01-10 stsp 			fatal("%s: imsg_get error", __func__);
1404 ae7c1b78 2023-01-10 stsp 		if (n == 0)	/* No more messages. */
1405 ae7c1b78 2023-01-10 stsp 			break;
1406 ae7c1b78 2023-01-10 stsp 
1407 ae7c1b78 2023-01-10 stsp 		switch (imsg.hdr.type) {
1408 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_ERROR:
1409 ae7c1b78 2023-01-10 stsp 			do_disconnect = 1;
1410 ae7c1b78 2023-01-10 stsp 			err = gotd_imsg_recv_error(&client_id, &imsg);
1411 ae7c1b78 2023-01-10 stsp 			break;
1412 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_CONNECT:
1413 ae7c1b78 2023-01-10 stsp 			err = recv_connect(&imsg);
1414 ae7c1b78 2023-01-10 stsp 			break;
1415 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_DISCONNECT:
1416 ae7c1b78 2023-01-10 stsp 			do_disconnect = 1;
1417 ae7c1b78 2023-01-10 stsp 			break;
1418 ae7c1b78 2023-01-10 stsp 		case GOTD_IMSG_CONNECT_REPO_CHILD:
1419 ae7c1b78 2023-01-10 stsp 			err = recv_repo_child(&imsg);
1420 ae7c1b78 2023-01-10 stsp 			if (err)
1421 ae7c1b78 2023-01-10 stsp 				break;
1422 ae7c1b78 2023-01-10 stsp 			do_list_refs = 1;
1423 ae7c1b78 2023-01-10 stsp 			break;
1424 ae7c1b78 2023-01-10 stsp 		default:
1425 ae7c1b78 2023-01-10 stsp 			log_debug("unexpected imsg %d", imsg.hdr.type);
1426 ae7c1b78 2023-01-10 stsp 			break;
1427 ae7c1b78 2023-01-10 stsp 		}
1428 ae7c1b78 2023-01-10 stsp 		imsg_free(&imsg);
1429 ae7c1b78 2023-01-10 stsp 
1430 ae7c1b78 2023-01-10 stsp 		if (do_disconnect) {
1431 ae7c1b78 2023-01-10 stsp 			if (err)
1432 ae7c1b78 2023-01-10 stsp 				disconnect_on_error(client, err);
1433 ae7c1b78 2023-01-10 stsp 			else
1434 ae7c1b78 2023-01-10 stsp 				disconnect(client);
1435 ae7c1b78 2023-01-10 stsp 		} else if (do_list_refs)
1436 ae7c1b78 2023-01-10 stsp 			err = list_refs_request();
1437 ae7c1b78 2023-01-10 stsp 
1438 ae7c1b78 2023-01-10 stsp 		if (err)
1439 ae7c1b78 2023-01-10 stsp 			log_warnx("uid %d: %s", client->euid, err->msg);
1440 ae7c1b78 2023-01-10 stsp 	}
1441 ae7c1b78 2023-01-10 stsp done:
1442 ae7c1b78 2023-01-10 stsp 	if (!shut) {
1443 ae7c1b78 2023-01-10 stsp 		gotd_imsg_event_add(iev);
1444 ae7c1b78 2023-01-10 stsp 	} else {
1445 ae7c1b78 2023-01-10 stsp 		/* This pipe is dead. Remove its event handler */
1446 ae7c1b78 2023-01-10 stsp 		event_del(&iev->ev);
1447 ae7c1b78 2023-01-10 stsp 		event_loopexit(NULL);
1448 da76b651 2023-02-03 mark 	}
1449 ae7c1b78 2023-01-10 stsp }
1450 ae7c1b78 2023-01-10 stsp 
1451 ae7c1b78 2023-01-10 stsp void
1452 ae7c1b78 2023-01-10 stsp session_main(const char *title, const char *repo_path,
1453 ae7c1b78 2023-01-10 stsp     int *pack_fds, int *temp_fds, struct timeval *request_timeout)
1454 ae7c1b78 2023-01-10 stsp {
1455 ae7c1b78 2023-01-10 stsp 	const struct got_error *err = NULL;
1456 ae7c1b78 2023-01-10 stsp 	struct event evsigint, evsigterm, evsighup, evsigusr1;
1457 ae7c1b78 2023-01-10 stsp 
1458 ae7c1b78 2023-01-10 stsp 	gotd_session.title = title;
1459 ae7c1b78 2023-01-10 stsp 	gotd_session.pid = getpid();
1460 ae7c1b78 2023-01-10 stsp 	gotd_session.pack_fds = pack_fds;
1461 ae7c1b78 2023-01-10 stsp 	gotd_session.temp_fds = temp_fds;
1462 ae7c1b78 2023-01-10 stsp 	memcpy(&gotd_session.request_timeout, request_timeout,
1463 ae7c1b78 2023-01-10 stsp 	    sizeof(gotd_session.request_timeout));
1464 ae7c1b78 2023-01-10 stsp 
1465 ae7c1b78 2023-01-10 stsp 	err = got_repo_open(&gotd_session.repo, repo_path, NULL, pack_fds);
1466 ae7c1b78 2023-01-10 stsp 	if (err)
1467 ae7c1b78 2023-01-10 stsp 		goto done;
1468 ae7c1b78 2023-01-10 stsp 	if (!got_repo_is_bare(gotd_session.repo)) {
1469 ae7c1b78 2023-01-10 stsp 		err = got_error_msg(GOT_ERR_NOT_GIT_REPO,
1470 ae7c1b78 2023-01-10 stsp 		    "bare git repository required");
1471 ae7c1b78 2023-01-10 stsp 		goto done;
1472 ae7c1b78 2023-01-10 stsp 	}
1473 ae7c1b78 2023-01-10 stsp 
1474 ae7c1b78 2023-01-10 stsp 	got_repo_temp_fds_set(gotd_session.repo, temp_fds);
1475 ae7c1b78 2023-01-10 stsp 
1476 ae7c1b78 2023-01-10 stsp 	signal_set(&evsigint, SIGINT, gotd_session_sighdlr, NULL);
1477 ae7c1b78 2023-01-10 stsp 	signal_set(&evsigterm, SIGTERM, gotd_session_sighdlr, NULL);
1478 ae7c1b78 2023-01-10 stsp 	signal_set(&evsighup, SIGHUP, gotd_session_sighdlr, NULL);
1479 ae7c1b78 2023-01-10 stsp 	signal_set(&evsigusr1, SIGUSR1, gotd_session_sighdlr, NULL);
1480 ae7c1b78 2023-01-10 stsp 	signal(SIGPIPE, SIG_IGN);
1481 ae7c1b78 2023-01-10 stsp 
1482 ae7c1b78 2023-01-10 stsp 	signal_add(&evsigint, NULL);
1483 ae7c1b78 2023-01-10 stsp 	signal_add(&evsigterm, NULL);
1484 ae7c1b78 2023-01-10 stsp 	signal_add(&evsighup, NULL);
1485 ae7c1b78 2023-01-10 stsp 	signal_add(&evsigusr1, NULL);
1486 ae7c1b78 2023-01-10 stsp 
1487 ae7c1b78 2023-01-10 stsp 	gotd_session_client.state = GOTD_STATE_EXPECT_LIST_REFS;
1488 ae7c1b78 2023-01-10 stsp 	gotd_session_client.fd = -1;
1489 ae7c1b78 2023-01-10 stsp 	gotd_session_client.nref_updates = -1;
1490 2fc51af0 2023-01-10 stsp 	gotd_session_client.delta_cache_fd = -1;
1491 3448a19a 2023-01-21 stsp 	gotd_session_client.accept_flush_pkt = 1;
1492 ae7c1b78 2023-01-10 stsp 
1493 ae7c1b78 2023-01-10 stsp 	imsg_init(&gotd_session.parent_iev.ibuf, GOTD_FILENO_MSG_PIPE);
1494 ae7c1b78 2023-01-10 stsp 	gotd_session.parent_iev.handler = session_dispatch;
1495 ae7c1b78 2023-01-10 stsp 	gotd_session.parent_iev.events = EV_READ;
1496 ae7c1b78 2023-01-10 stsp 	gotd_session.parent_iev.handler_arg = NULL;
1497 ae7c1b78 2023-01-10 stsp 	event_set(&gotd_session.parent_iev.ev, gotd_session.parent_iev.ibuf.fd,
1498 ae7c1b78 2023-01-10 stsp 	    EV_READ, session_dispatch, &gotd_session.parent_iev);
1499 ae7c1b78 2023-01-10 stsp 	if (gotd_imsg_compose_event(&gotd_session.parent_iev,
1500 ae7c1b78 2023-01-10 stsp 	    GOTD_IMSG_CLIENT_SESSION_READY, PROC_SESSION, -1, NULL, 0) == -1) {
1501 ae7c1b78 2023-01-10 stsp 		err = got_error_from_errno("imsg compose CLIENT_SESSION_READY");
1502 ae7c1b78 2023-01-10 stsp 		goto done;
1503 ae7c1b78 2023-01-10 stsp 	}
1504 ae7c1b78 2023-01-10 stsp 
1505 ae7c1b78 2023-01-10 stsp 	event_dispatch();
1506 ae7c1b78 2023-01-10 stsp done:
1507 ae7c1b78 2023-01-10 stsp 	if (err)
1508 ae7c1b78 2023-01-10 stsp 		log_warnx("%s: %s", title, err->msg);
1509 ae7c1b78 2023-01-10 stsp 	gotd_session_shutdown();
1510 ae7c1b78 2023-01-10 stsp }
1511 ae7c1b78 2023-01-10 stsp 
1512 ae7c1b78 2023-01-10 stsp void
1513 ae7c1b78 2023-01-10 stsp gotd_session_shutdown(void)
1514 ae7c1b78 2023-01-10 stsp {
1515 2ec74a9e 2023-02-08 op 	log_debug("shutting down");
1516 ae7c1b78 2023-01-10 stsp 	if (gotd_session.repo)
1517 ae7c1b78 2023-01-10 stsp 		got_repo_close(gotd_session.repo);
1518 ae7c1b78 2023-01-10 stsp 	got_repo_pack_fds_close(gotd_session.pack_fds);
1519 ae7c1b78 2023-01-10 stsp 	got_repo_temp_fds_close(gotd_session.temp_fds);
1520 ae7c1b78 2023-01-10 stsp 	exit(0);
1521 ae7c1b78 2023-01-10 stsp }