1 62ee7d94 2023-01-10 thomas /*
   2 62ee7d94 2023-01-10 thomas  * Copyright (c) 2022, 2023 Stefan Sperling <stsp@openbsd.org>
   3 62ee7d94 2023-01-10 thomas  *
   4 62ee7d94 2023-01-10 thomas  * Permission to use, copy, modify, and distribute this software for any
   5 62ee7d94 2023-01-10 thomas  * purpose with or without fee is hereby granted, provided that the above
   6 62ee7d94 2023-01-10 thomas  * copyright notice and this permission notice appear in all copies.
   7 62ee7d94 2023-01-10 thomas  *
   8 62ee7d94 2023-01-10 thomas  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9 62ee7d94 2023-01-10 thomas  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10 62ee7d94 2023-01-10 thomas  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11 62ee7d94 2023-01-10 thomas  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12 62ee7d94 2023-01-10 thomas  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13 62ee7d94 2023-01-10 thomas  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14 62ee7d94 2023-01-10 thomas  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15 62ee7d94 2023-01-10 thomas  */
  16 fde1a996 2023-08-23 thomas 
  17 fde1a996 2023-08-23 thomas #include "got_compat.h"
  18 62ee7d94 2023-01-10 thomas 
  19 62ee7d94 2023-01-10 thomas #include <sys/types.h>
  20 62ee7d94 2023-01-10 thomas #include <sys/queue.h>
  21 62ee7d94 2023-01-10 thomas #include <sys/socket.h>
  22 851a5b48 2023-02-03 thomas #include <sys/stat.h>
  23 62ee7d94 2023-01-10 thomas #include <sys/uio.h>
  24 62ee7d94 2023-01-10 thomas 
  25 62ee7d94 2023-01-10 thomas #include <errno.h>
  26 62ee7d94 2023-01-10 thomas #include <event.h>
  27 62ee7d94 2023-01-10 thomas #include <limits.h>
  28 62ee7d94 2023-01-10 thomas #include <signal.h>
  29 62ee7d94 2023-01-10 thomas #include <stdint.h>
  30 62ee7d94 2023-01-10 thomas #include <stdio.h>
  31 62ee7d94 2023-01-10 thomas #include <stdlib.h>
  32 62ee7d94 2023-01-10 thomas #include <string.h>
  33 62ee7d94 2023-01-10 thomas #include <imsg.h>
  34 62ee7d94 2023-01-10 thomas #include <unistd.h>
  35 621b8de0 2023-08-23 thomas 
  36 621b8de0 2023-08-23 thomas #include "got_compat.h"
  37 62ee7d94 2023-01-10 thomas 
  38 62ee7d94 2023-01-10 thomas #include "got_error.h"
  39 62ee7d94 2023-01-10 thomas #include "got_repository.h"
  40 62ee7d94 2023-01-10 thomas #include "got_object.h"
  41 62ee7d94 2023-01-10 thomas #include "got_path.h"
  42 62ee7d94 2023-01-10 thomas #include "got_reference.h"
  43 62ee7d94 2023-01-10 thomas #include "got_opentemp.h"
  44 62ee7d94 2023-01-10 thomas 
  45 be288a59 2023-02-23 thomas #include "got_lib_hash.h"
  46 62ee7d94 2023-01-10 thomas #include "got_lib_delta.h"
  47 62ee7d94 2023-01-10 thomas #include "got_lib_object.h"
  48 62ee7d94 2023-01-10 thomas #include "got_lib_object_cache.h"
  49 62ee7d94 2023-01-10 thomas #include "got_lib_pack.h"
  50 62ee7d94 2023-01-10 thomas #include "got_lib_repository.h"
  51 62ee7d94 2023-01-10 thomas #include "got_lib_gitproto.h"
  52 62ee7d94 2023-01-10 thomas 
  53 62ee7d94 2023-01-10 thomas #include "gotd.h"
  54 62ee7d94 2023-01-10 thomas #include "log.h"
  55 62ee7d94 2023-01-10 thomas #include "session.h"
  56 62ee7d94 2023-01-10 thomas 
  57 62ee7d94 2023-01-10 thomas 
  58 62ee7d94 2023-01-10 thomas static struct gotd_session {
  59 62ee7d94 2023-01-10 thomas 	pid_t pid;
  60 62ee7d94 2023-01-10 thomas 	const char *title;
  61 62ee7d94 2023-01-10 thomas 	struct got_repository *repo;
  62 62ee7d94 2023-01-10 thomas 	int *pack_fds;
  63 62ee7d94 2023-01-10 thomas 	int *temp_fds;
  64 62ee7d94 2023-01-10 thomas 	struct gotd_imsgev parent_iev;
  65 62ee7d94 2023-01-10 thomas 	struct timeval request_timeout;
  66 7fed8fa4 2023-06-22 thomas 	enum gotd_procid proc_id;
  67 62ee7d94 2023-01-10 thomas } gotd_session;
  68 62ee7d94 2023-01-10 thomas 
  69 62ee7d94 2023-01-10 thomas static struct gotd_session_client {
  70 7b1db75e 2023-01-14 thomas 	enum gotd_session_state		 state;
  71 62ee7d94 2023-01-10 thomas 	int				 is_writing;
  72 62ee7d94 2023-01-10 thomas 	struct gotd_client_capability	*capabilities;
  73 62ee7d94 2023-01-10 thomas 	size_t				 ncapa_alloc;
  74 62ee7d94 2023-01-10 thomas 	size_t				 ncapabilities;
  75 62ee7d94 2023-01-10 thomas 	uint32_t			 id;
  76 62ee7d94 2023-01-10 thomas 	int				 fd;
  77 62ee7d94 2023-01-10 thomas 	int				 delta_cache_fd;
  78 62ee7d94 2023-01-10 thomas 	struct gotd_imsgev		 iev;
  79 62ee7d94 2023-01-10 thomas 	struct gotd_imsgev		 repo_child_iev;
  80 62ee7d94 2023-01-10 thomas 	struct event			 tmo;
  81 62ee7d94 2023-01-10 thomas 	uid_t				 euid;
  82 62ee7d94 2023-01-10 thomas 	gid_t				 egid;
  83 62ee7d94 2023-01-10 thomas 	char				*packfile_path;
  84 62ee7d94 2023-01-10 thomas 	char				*packidx_path;
  85 62ee7d94 2023-01-10 thomas 	int				 nref_updates;
  86 98c7fd82 2023-01-23 thomas 	int				 accept_flush_pkt;
  87 c8b73ac1 2023-08-23 thomas 	int				 flush_disconnect;
  88 62ee7d94 2023-01-10 thomas } gotd_session_client;
  89 62ee7d94 2023-01-10 thomas 
  90 62ee7d94 2023-01-10 thomas void gotd_session_sighdlr(int sig, short event, void *arg);
  91 62ee7d94 2023-01-10 thomas static void gotd_session_shutdown(void);
  92 62ee7d94 2023-01-10 thomas 
  93 62ee7d94 2023-01-10 thomas static void
  94 62ee7d94 2023-01-10 thomas disconnect(struct gotd_session_client *client)
  95 62ee7d94 2023-01-10 thomas {
  96 62ee7d94 2023-01-10 thomas 	log_debug("uid %d: disconnecting", client->euid);
  97 62ee7d94 2023-01-10 thomas 
  98 62ee7d94 2023-01-10 thomas 	if (gotd_imsg_compose_event(&gotd_session.parent_iev,
  99 7fed8fa4 2023-06-22 thomas 	    GOTD_IMSG_DISCONNECT, gotd_session.proc_id, -1, NULL, 0) == -1)
 100 62ee7d94 2023-01-10 thomas 		log_warn("imsg compose DISCONNECT");
 101 62ee7d94 2023-01-10 thomas 
 102 62ee7d94 2023-01-10 thomas 	imsg_clear(&client->repo_child_iev.ibuf);
 103 62ee7d94 2023-01-10 thomas 	event_del(&client->repo_child_iev.ev);
 104 62ee7d94 2023-01-10 thomas 	evtimer_del(&client->tmo);
 105 62ee7d94 2023-01-10 thomas 	close(client->fd);
 106 62ee7d94 2023-01-10 thomas 	if (client->delta_cache_fd != -1)
 107 62ee7d94 2023-01-10 thomas 		close(client->delta_cache_fd);
 108 62ee7d94 2023-01-10 thomas 	if (client->packfile_path) {
 109 62ee7d94 2023-01-10 thomas 		if (unlink(client->packfile_path) == -1 && errno != ENOENT)
 110 62ee7d94 2023-01-10 thomas 			log_warn("unlink %s: ", client->packfile_path);
 111 62ee7d94 2023-01-10 thomas 		free(client->packfile_path);
 112 62ee7d94 2023-01-10 thomas 	}
 113 62ee7d94 2023-01-10 thomas 	if (client->packidx_path) {
 114 62ee7d94 2023-01-10 thomas 		if (unlink(client->packidx_path) == -1 && errno != ENOENT)
 115 62ee7d94 2023-01-10 thomas 			log_warn("unlink %s: ", client->packidx_path);
 116 62ee7d94 2023-01-10 thomas 		free(client->packidx_path);
 117 62ee7d94 2023-01-10 thomas 	}
 118 62ee7d94 2023-01-10 thomas 	free(client->capabilities);
 119 62ee7d94 2023-01-10 thomas 
 120 62ee7d94 2023-01-10 thomas 	gotd_session_shutdown();
 121 62ee7d94 2023-01-10 thomas }
 122 62ee7d94 2023-01-10 thomas 
 123 62ee7d94 2023-01-10 thomas static void
 124 62ee7d94 2023-01-10 thomas disconnect_on_error(struct gotd_session_client *client,
 125 62ee7d94 2023-01-10 thomas     const struct got_error *err)
 126 62ee7d94 2023-01-10 thomas {
 127 62ee7d94 2023-01-10 thomas 	struct imsgbuf ibuf;
 128 62ee7d94 2023-01-10 thomas 
 129 62ee7d94 2023-01-10 thomas 	if (err->code != GOT_ERR_EOF) {
 130 a6153ffb 2023-08-12 thomas 		log_warnx("uid %d: %s", client->euid, err->msg);
 131 62ee7d94 2023-01-10 thomas 		imsg_init(&ibuf, client->fd);
 132 7fed8fa4 2023-06-22 thomas 		gotd_imsg_send_error(&ibuf, 0, gotd_session.proc_id, err);
 133 62ee7d94 2023-01-10 thomas 		imsg_clear(&ibuf);
 134 62ee7d94 2023-01-10 thomas 	}
 135 62ee7d94 2023-01-10 thomas 
 136 62ee7d94 2023-01-10 thomas 	disconnect(client);
 137 62ee7d94 2023-01-10 thomas }
 138 62ee7d94 2023-01-10 thomas 
 139 62ee7d94 2023-01-10 thomas static void
 140 62ee7d94 2023-01-10 thomas gotd_request_timeout(int fd, short events, void *arg)
 141 62ee7d94 2023-01-10 thomas {
 142 62ee7d94 2023-01-10 thomas 	struct gotd_session_client *client = arg;
 143 62ee7d94 2023-01-10 thomas 
 144 62ee7d94 2023-01-10 thomas 	log_debug("disconnecting uid %d due to timeout", client->euid);
 145 62ee7d94 2023-01-10 thomas 	disconnect(client);
 146 62ee7d94 2023-01-10 thomas }
 147 62ee7d94 2023-01-10 thomas 
 148 62ee7d94 2023-01-10 thomas void
 149 62ee7d94 2023-01-10 thomas gotd_session_sighdlr(int sig, short event, void *arg)
 150 62ee7d94 2023-01-10 thomas {
 151 62ee7d94 2023-01-10 thomas 	/*
 152 62ee7d94 2023-01-10 thomas 	 * Normal signal handler rules don't apply because libevent
 153 62ee7d94 2023-01-10 thomas 	 * decouples for us.
 154 62ee7d94 2023-01-10 thomas 	 */
 155 62ee7d94 2023-01-10 thomas 
 156 62ee7d94 2023-01-10 thomas 	switch (sig) {
 157 62ee7d94 2023-01-10 thomas 	case SIGHUP:
 158 62ee7d94 2023-01-10 thomas 		log_info("%s: ignoring SIGHUP", __func__);
 159 62ee7d94 2023-01-10 thomas 		break;
 160 62ee7d94 2023-01-10 thomas 	case SIGUSR1:
 161 62ee7d94 2023-01-10 thomas 		log_info("%s: ignoring SIGUSR1", __func__);
 162 62ee7d94 2023-01-10 thomas 		break;
 163 62ee7d94 2023-01-10 thomas 	case SIGTERM:
 164 62ee7d94 2023-01-10 thomas 	case SIGINT:
 165 62ee7d94 2023-01-10 thomas 		gotd_session_shutdown();
 166 62ee7d94 2023-01-10 thomas 		/* NOTREACHED */
 167 62ee7d94 2023-01-10 thomas 		break;
 168 62ee7d94 2023-01-10 thomas 	default:
 169 62ee7d94 2023-01-10 thomas 		fatalx("unexpected signal");
 170 62ee7d94 2023-01-10 thomas 	}
 171 62ee7d94 2023-01-10 thomas }
 172 62ee7d94 2023-01-10 thomas 
 173 62ee7d94 2023-01-10 thomas static const struct got_error *
 174 62ee7d94 2023-01-10 thomas recv_packfile_done(uint32_t *client_id, struct imsg *imsg)
 175 62ee7d94 2023-01-10 thomas {
 176 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_packfile_done idone;
 177 62ee7d94 2023-01-10 thomas 	size_t datalen;
 178 62ee7d94 2023-01-10 thomas 
 179 62ee7d94 2023-01-10 thomas 	log_debug("packfile-done received");
 180 62ee7d94 2023-01-10 thomas 
 181 62ee7d94 2023-01-10 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 182 62ee7d94 2023-01-10 thomas 	if (datalen != sizeof(idone))
 183 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 184 62ee7d94 2023-01-10 thomas 	memcpy(&idone, imsg->data, sizeof(idone));
 185 62ee7d94 2023-01-10 thomas 
 186 62ee7d94 2023-01-10 thomas 	*client_id = idone.client_id;
 187 62ee7d94 2023-01-10 thomas 	return NULL;
 188 62ee7d94 2023-01-10 thomas }
 189 62ee7d94 2023-01-10 thomas 
 190 62ee7d94 2023-01-10 thomas static const struct got_error *
 191 62ee7d94 2023-01-10 thomas recv_packfile_install(uint32_t *client_id, struct imsg *imsg)
 192 62ee7d94 2023-01-10 thomas {
 193 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_packfile_install inst;
 194 62ee7d94 2023-01-10 thomas 	size_t datalen;
 195 62ee7d94 2023-01-10 thomas 
 196 62ee7d94 2023-01-10 thomas 	log_debug("packfile-install received");
 197 62ee7d94 2023-01-10 thomas 
 198 62ee7d94 2023-01-10 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 199 62ee7d94 2023-01-10 thomas 	if (datalen != sizeof(inst))
 200 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 201 62ee7d94 2023-01-10 thomas 	memcpy(&inst, imsg->data, sizeof(inst));
 202 62ee7d94 2023-01-10 thomas 
 203 62ee7d94 2023-01-10 thomas 	*client_id = inst.client_id;
 204 62ee7d94 2023-01-10 thomas 	return NULL;
 205 62ee7d94 2023-01-10 thomas }
 206 62ee7d94 2023-01-10 thomas 
 207 62ee7d94 2023-01-10 thomas static const struct got_error *
 208 62ee7d94 2023-01-10 thomas recv_ref_updates_start(uint32_t *client_id, struct imsg *imsg)
 209 62ee7d94 2023-01-10 thomas {
 210 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_ref_updates_start istart;
 211 62ee7d94 2023-01-10 thomas 	size_t datalen;
 212 62ee7d94 2023-01-10 thomas 
 213 62ee7d94 2023-01-10 thomas 	log_debug("ref-updates-start received");
 214 62ee7d94 2023-01-10 thomas 
 215 62ee7d94 2023-01-10 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 216 62ee7d94 2023-01-10 thomas 	if (datalen != sizeof(istart))
 217 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 218 62ee7d94 2023-01-10 thomas 	memcpy(&istart, imsg->data, sizeof(istart));
 219 62ee7d94 2023-01-10 thomas 
 220 62ee7d94 2023-01-10 thomas 	*client_id = istart.client_id;
 221 62ee7d94 2023-01-10 thomas 	return NULL;
 222 62ee7d94 2023-01-10 thomas }
 223 62ee7d94 2023-01-10 thomas 
 224 62ee7d94 2023-01-10 thomas static const struct got_error *
 225 62ee7d94 2023-01-10 thomas recv_ref_update(uint32_t *client_id, struct imsg *imsg)
 226 62ee7d94 2023-01-10 thomas {
 227 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_ref_update iref;
 228 62ee7d94 2023-01-10 thomas 	size_t datalen;
 229 62ee7d94 2023-01-10 thomas 
 230 62ee7d94 2023-01-10 thomas 	log_debug("ref-update received");
 231 62ee7d94 2023-01-10 thomas 
 232 62ee7d94 2023-01-10 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 233 62ee7d94 2023-01-10 thomas 	if (datalen < sizeof(iref))
 234 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 235 62ee7d94 2023-01-10 thomas 	memcpy(&iref, imsg->data, sizeof(iref));
 236 62ee7d94 2023-01-10 thomas 
 237 62ee7d94 2023-01-10 thomas 	*client_id = iref.client_id;
 238 62ee7d94 2023-01-10 thomas 	return NULL;
 239 62ee7d94 2023-01-10 thomas }
 240 62ee7d94 2023-01-10 thomas 
 241 62ee7d94 2023-01-10 thomas static const struct got_error *
 242 62ee7d94 2023-01-10 thomas send_ref_update_ok(struct gotd_session_client *client,
 243 62ee7d94 2023-01-10 thomas     struct gotd_imsg_ref_update *iref, const char *refname)
 244 62ee7d94 2023-01-10 thomas {
 245 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_ref_update_ok iok;
 246 62ee7d94 2023-01-10 thomas 	struct gotd_imsgev *iev = &client->iev;
 247 62ee7d94 2023-01-10 thomas 	struct ibuf *wbuf;
 248 62ee7d94 2023-01-10 thomas 	size_t len;
 249 62ee7d94 2023-01-10 thomas 
 250 62ee7d94 2023-01-10 thomas 	memset(&iok, 0, sizeof(iok));
 251 62ee7d94 2023-01-10 thomas 	iok.client_id = client->id;
 252 62ee7d94 2023-01-10 thomas 	memcpy(iok.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
 253 62ee7d94 2023-01-10 thomas 	memcpy(iok.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
 254 62ee7d94 2023-01-10 thomas 	iok.name_len = strlen(refname);
 255 62ee7d94 2023-01-10 thomas 
 256 62ee7d94 2023-01-10 thomas 	len = sizeof(iok) + iok.name_len;
 257 62ee7d94 2023-01-10 thomas 	wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE_OK,
 258 7fed8fa4 2023-06-22 thomas 	    gotd_session.proc_id, gotd_session.pid, len);
 259 62ee7d94 2023-01-10 thomas 	if (wbuf == NULL)
 260 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("imsg_create REF_UPDATE_OK");
 261 62ee7d94 2023-01-10 thomas 
 262 62ee7d94 2023-01-10 thomas 	if (imsg_add(wbuf, &iok, sizeof(iok)) == -1)
 263 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("imsg_add REF_UPDATE_OK");
 264 62ee7d94 2023-01-10 thomas 	if (imsg_add(wbuf, refname, iok.name_len) == -1)
 265 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("imsg_add REF_UPDATE_OK");
 266 62ee7d94 2023-01-10 thomas 
 267 62ee7d94 2023-01-10 thomas 	wbuf->fd = -1;
 268 62ee7d94 2023-01-10 thomas 	imsg_close(&iev->ibuf, wbuf);
 269 62ee7d94 2023-01-10 thomas 	gotd_imsg_event_add(iev);
 270 62ee7d94 2023-01-10 thomas 	return NULL;
 271 62ee7d94 2023-01-10 thomas }
 272 62ee7d94 2023-01-10 thomas 
 273 62ee7d94 2023-01-10 thomas static void
 274 62ee7d94 2023-01-10 thomas send_refs_updated(struct gotd_session_client *client)
 275 62ee7d94 2023-01-10 thomas {
 276 62ee7d94 2023-01-10 thomas 	if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_REFS_UPDATED,
 277 7fed8fa4 2023-06-22 thomas 	    gotd_session.proc_id, -1, NULL, 0) == -1)
 278 62ee7d94 2023-01-10 thomas 		log_warn("imsg compose REFS_UPDATED");
 279 62ee7d94 2023-01-10 thomas }
 280 62ee7d94 2023-01-10 thomas 
 281 62ee7d94 2023-01-10 thomas static const struct got_error *
 282 62ee7d94 2023-01-10 thomas send_ref_update_ng(struct gotd_session_client *client,
 283 62ee7d94 2023-01-10 thomas     struct gotd_imsg_ref_update *iref, const char *refname,
 284 62ee7d94 2023-01-10 thomas     const char *reason)
 285 62ee7d94 2023-01-10 thomas {
 286 62ee7d94 2023-01-10 thomas 	const struct got_error *ng_err;
 287 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_ref_update_ng ing;
 288 62ee7d94 2023-01-10 thomas 	struct gotd_imsgev *iev = &client->iev;
 289 62ee7d94 2023-01-10 thomas 	struct ibuf *wbuf;
 290 62ee7d94 2023-01-10 thomas 	size_t len;
 291 62ee7d94 2023-01-10 thomas 
 292 62ee7d94 2023-01-10 thomas 	memset(&ing, 0, sizeof(ing));
 293 62ee7d94 2023-01-10 thomas 	ing.client_id = client->id;
 294 62ee7d94 2023-01-10 thomas 	memcpy(ing.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
 295 62ee7d94 2023-01-10 thomas 	memcpy(ing.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
 296 62ee7d94 2023-01-10 thomas 	ing.name_len = strlen(refname);
 297 62ee7d94 2023-01-10 thomas 
 298 62ee7d94 2023-01-10 thomas 	ng_err = got_error_fmt(GOT_ERR_REF_BUSY, "%s", reason);
 299 62ee7d94 2023-01-10 thomas 	ing.reason_len = strlen(ng_err->msg);
 300 62ee7d94 2023-01-10 thomas 
 301 62ee7d94 2023-01-10 thomas 	len = sizeof(ing) + ing.name_len + ing.reason_len;
 302 62ee7d94 2023-01-10 thomas 	wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE_NG,
 303 7fed8fa4 2023-06-22 thomas 	    gotd_session.proc_id, gotd_session.pid, len);
 304 62ee7d94 2023-01-10 thomas 	if (wbuf == NULL)
 305 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("imsg_create REF_UPDATE_NG");
 306 62ee7d94 2023-01-10 thomas 
 307 62ee7d94 2023-01-10 thomas 	if (imsg_add(wbuf, &ing, sizeof(ing)) == -1)
 308 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
 309 62ee7d94 2023-01-10 thomas 	if (imsg_add(wbuf, refname, ing.name_len) == -1)
 310 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
 311 62ee7d94 2023-01-10 thomas 	if (imsg_add(wbuf, ng_err->msg, ing.reason_len) == -1)
 312 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
 313 62ee7d94 2023-01-10 thomas 
 314 62ee7d94 2023-01-10 thomas 	wbuf->fd = -1;
 315 62ee7d94 2023-01-10 thomas 	imsg_close(&iev->ibuf, wbuf);
 316 62ee7d94 2023-01-10 thomas 	gotd_imsg_event_add(iev);
 317 62ee7d94 2023-01-10 thomas 	return NULL;
 318 62ee7d94 2023-01-10 thomas }
 319 62ee7d94 2023-01-10 thomas 
 320 62ee7d94 2023-01-10 thomas static const struct got_error *
 321 62ee7d94 2023-01-10 thomas install_pack(struct gotd_session_client *client, const char *repo_path,
 322 62ee7d94 2023-01-10 thomas     struct imsg *imsg)
 323 62ee7d94 2023-01-10 thomas {
 324 62ee7d94 2023-01-10 thomas 	const struct got_error *err = NULL;
 325 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_packfile_install inst;
 326 62ee7d94 2023-01-10 thomas 	char hex[SHA1_DIGEST_STRING_LENGTH];
 327 62ee7d94 2023-01-10 thomas 	size_t datalen;
 328 62ee7d94 2023-01-10 thomas 	char *packfile_path = NULL, *packidx_path = NULL;
 329 62ee7d94 2023-01-10 thomas 
 330 62ee7d94 2023-01-10 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 331 62ee7d94 2023-01-10 thomas 	if (datalen != sizeof(inst))
 332 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 333 62ee7d94 2023-01-10 thomas 	memcpy(&inst, imsg->data, sizeof(inst));
 334 62ee7d94 2023-01-10 thomas 
 335 62ee7d94 2023-01-10 thomas 	if (client->packfile_path == NULL)
 336 62ee7d94 2023-01-10 thomas 		return got_error_msg(GOT_ERR_BAD_REQUEST,
 337 62ee7d94 2023-01-10 thomas 		    "client has no pack file");
 338 62ee7d94 2023-01-10 thomas 	if (client->packidx_path == NULL)
 339 62ee7d94 2023-01-10 thomas 		return got_error_msg(GOT_ERR_BAD_REQUEST,
 340 62ee7d94 2023-01-10 thomas 		    "client has no pack file index");
 341 62ee7d94 2023-01-10 thomas 
 342 62ee7d94 2023-01-10 thomas 	if (got_sha1_digest_to_str(inst.pack_sha1, hex, sizeof(hex)) == NULL)
 343 62ee7d94 2023-01-10 thomas 		return got_error_msg(GOT_ERR_NO_SPACE,
 344 62ee7d94 2023-01-10 thomas 		    "could not convert pack file SHA1 to hex");
 345 62ee7d94 2023-01-10 thomas 
 346 62ee7d94 2023-01-10 thomas 	if (asprintf(&packfile_path, "/%s/%s/pack-%s.pack",
 347 62ee7d94 2023-01-10 thomas 	    repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
 348 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("asprintf");
 349 62ee7d94 2023-01-10 thomas 		goto done;
 350 62ee7d94 2023-01-10 thomas 	}
 351 62ee7d94 2023-01-10 thomas 
 352 62ee7d94 2023-01-10 thomas 	if (asprintf(&packidx_path, "/%s/%s/pack-%s.idx",
 353 62ee7d94 2023-01-10 thomas 	    repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
 354 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("asprintf");
 355 62ee7d94 2023-01-10 thomas 		goto done;
 356 62ee7d94 2023-01-10 thomas 	}
 357 62ee7d94 2023-01-10 thomas 
 358 62ee7d94 2023-01-10 thomas 	if (rename(client->packfile_path, packfile_path) == -1) {
 359 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno3("rename", client->packfile_path,
 360 62ee7d94 2023-01-10 thomas 		    packfile_path);
 361 62ee7d94 2023-01-10 thomas 		goto done;
 362 62ee7d94 2023-01-10 thomas 	}
 363 62ee7d94 2023-01-10 thomas 
 364 62ee7d94 2023-01-10 thomas 	free(client->packfile_path);
 365 62ee7d94 2023-01-10 thomas 	client->packfile_path = NULL;
 366 62ee7d94 2023-01-10 thomas 
 367 62ee7d94 2023-01-10 thomas 	if (rename(client->packidx_path, packidx_path) == -1) {
 368 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno3("rename", client->packidx_path,
 369 62ee7d94 2023-01-10 thomas 		    packidx_path);
 370 62ee7d94 2023-01-10 thomas 		goto done;
 371 62ee7d94 2023-01-10 thomas 	}
 372 62ee7d94 2023-01-10 thomas 
 373 62ee7d94 2023-01-10 thomas 	free(client->packidx_path);
 374 62ee7d94 2023-01-10 thomas 	client->packidx_path = NULL;
 375 62ee7d94 2023-01-10 thomas done:
 376 62ee7d94 2023-01-10 thomas 	free(packfile_path);
 377 62ee7d94 2023-01-10 thomas 	free(packidx_path);
 378 62ee7d94 2023-01-10 thomas 	return err;
 379 62ee7d94 2023-01-10 thomas }
 380 62ee7d94 2023-01-10 thomas 
 381 62ee7d94 2023-01-10 thomas static const struct got_error *
 382 62ee7d94 2023-01-10 thomas begin_ref_updates(struct gotd_session_client *client, struct imsg *imsg)
 383 62ee7d94 2023-01-10 thomas {
 384 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_ref_updates_start istart;
 385 62ee7d94 2023-01-10 thomas 	size_t datalen;
 386 62ee7d94 2023-01-10 thomas 
 387 62ee7d94 2023-01-10 thomas 	if (client->nref_updates != -1)
 388 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_MSG);
 389 62ee7d94 2023-01-10 thomas 
 390 62ee7d94 2023-01-10 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 391 62ee7d94 2023-01-10 thomas 	if (datalen != sizeof(istart))
 392 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 393 62ee7d94 2023-01-10 thomas 	memcpy(&istart, imsg->data, sizeof(istart));
 394 62ee7d94 2023-01-10 thomas 
 395 62ee7d94 2023-01-10 thomas 	if (istart.nref_updates <= 0)
 396 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_MSG);
 397 62ee7d94 2023-01-10 thomas 
 398 62ee7d94 2023-01-10 thomas 	client->nref_updates = istart.nref_updates;
 399 62ee7d94 2023-01-10 thomas 	return NULL;
 400 62ee7d94 2023-01-10 thomas }
 401 62ee7d94 2023-01-10 thomas 
 402 62ee7d94 2023-01-10 thomas static const struct got_error *
 403 d98779cd 2023-01-19 thomas update_ref(int *shut, struct gotd_session_client *client,
 404 d98779cd 2023-01-19 thomas     const char *repo_path, struct imsg *imsg)
 405 62ee7d94 2023-01-10 thomas {
 406 62ee7d94 2023-01-10 thomas 	const struct got_error *err = NULL;
 407 62ee7d94 2023-01-10 thomas 	struct got_repository *repo = NULL;
 408 62ee7d94 2023-01-10 thomas 	struct got_reference *ref = NULL;
 409 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_ref_update iref;
 410 62ee7d94 2023-01-10 thomas 	struct got_object_id old_id, new_id;
 411 62ee7d94 2023-01-10 thomas 	struct got_object_id *id = NULL;
 412 62ee7d94 2023-01-10 thomas 	struct got_object *obj = NULL;
 413 62ee7d94 2023-01-10 thomas 	char *refname = NULL;
 414 62ee7d94 2023-01-10 thomas 	size_t datalen;
 415 62ee7d94 2023-01-10 thomas 	int locked = 0;
 416 8a9c582b 2023-06-22 thomas 	char hex1[SHA1_DIGEST_STRING_LENGTH];
 417 8a9c582b 2023-06-22 thomas 	char hex2[SHA1_DIGEST_STRING_LENGTH];
 418 62ee7d94 2023-01-10 thomas 
 419 62ee7d94 2023-01-10 thomas 	log_debug("update-ref from uid %d", client->euid);
 420 62ee7d94 2023-01-10 thomas 
 421 62ee7d94 2023-01-10 thomas 	if (client->nref_updates <= 0)
 422 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_MSG);
 423 62ee7d94 2023-01-10 thomas 
 424 62ee7d94 2023-01-10 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 425 62ee7d94 2023-01-10 thomas 	if (datalen < sizeof(iref))
 426 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 427 62ee7d94 2023-01-10 thomas 	memcpy(&iref, imsg->data, sizeof(iref));
 428 62ee7d94 2023-01-10 thomas 	if (datalen != sizeof(iref) + iref.name_len)
 429 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 430 fcbb06bf 2023-01-14 thomas 	refname = strndup(imsg->data + sizeof(iref), iref.name_len);
 431 62ee7d94 2023-01-10 thomas 	if (refname == NULL)
 432 fcbb06bf 2023-01-14 thomas 		return got_error_from_errno("strndup");
 433 62ee7d94 2023-01-10 thomas 
 434 62ee7d94 2023-01-10 thomas 	log_debug("updating ref %s for uid %d", refname, client->euid);
 435 62ee7d94 2023-01-10 thomas 
 436 62ee7d94 2023-01-10 thomas 	err = got_repo_open(&repo, repo_path, NULL, NULL);
 437 62ee7d94 2023-01-10 thomas 	if (err)
 438 62ee7d94 2023-01-10 thomas 		goto done;
 439 62ee7d94 2023-01-10 thomas 
 440 62ee7d94 2023-01-10 thomas 	memcpy(old_id.sha1, iref.old_id, SHA1_DIGEST_LENGTH);
 441 62ee7d94 2023-01-10 thomas 	memcpy(new_id.sha1, iref.new_id, SHA1_DIGEST_LENGTH);
 442 49563dfb 2023-01-28 thomas 	err = got_object_open(&obj, repo,
 443 49563dfb 2023-01-28 thomas 	    iref.delete_ref ? &old_id : &new_id);
 444 62ee7d94 2023-01-10 thomas 	if (err)
 445 62ee7d94 2023-01-10 thomas 		goto done;
 446 62ee7d94 2023-01-10 thomas 
 447 62ee7d94 2023-01-10 thomas 	if (iref.ref_is_new) {
 448 62ee7d94 2023-01-10 thomas 		err = got_ref_open(&ref, repo, refname, 0);
 449 62ee7d94 2023-01-10 thomas 		if (err) {
 450 62ee7d94 2023-01-10 thomas 			if (err->code != GOT_ERR_NOT_REF)
 451 62ee7d94 2023-01-10 thomas 				goto done;
 452 62ee7d94 2023-01-10 thomas 			err = got_ref_alloc(&ref, refname, &new_id);
 453 62ee7d94 2023-01-10 thomas 			if (err)
 454 62ee7d94 2023-01-10 thomas 				goto done;
 455 62ee7d94 2023-01-10 thomas 			err = got_ref_write(ref, repo); /* will lock/unlock */
 456 62ee7d94 2023-01-10 thomas 			if (err)
 457 62ee7d94 2023-01-10 thomas 				goto done;
 458 62ee7d94 2023-01-10 thomas 		} else {
 459 8a9c582b 2023-06-22 thomas 			err = got_ref_resolve(&id, repo, ref);
 460 8a9c582b 2023-06-22 thomas 			if (err)
 461 8a9c582b 2023-06-22 thomas 				goto done;
 462 8a9c582b 2023-06-22 thomas 			got_object_id_hex(&new_id, hex1, sizeof(hex1));
 463 8a9c582b 2023-06-22 thomas 			got_object_id_hex(id, hex2, sizeof(hex2));
 464 62ee7d94 2023-01-10 thomas 			err = got_error_fmt(GOT_ERR_REF_BUSY,
 465 8a9c582b 2023-06-22 thomas 			    "Addition %s: %s failed; %s: %s has been "
 466 8a9c582b 2023-06-22 thomas 			    "created by someone else while transaction "
 467 8a9c582b 2023-06-22 thomas 			    "was in progress",
 468 8a9c582b 2023-06-22 thomas 			    got_ref_get_name(ref), hex1,
 469 8a9c582b 2023-06-22 thomas 			    got_ref_get_name(ref), hex2);
 470 62ee7d94 2023-01-10 thomas 			goto done;
 471 62ee7d94 2023-01-10 thomas 		}
 472 49563dfb 2023-01-28 thomas 	} else if (iref.delete_ref) {
 473 49563dfb 2023-01-28 thomas 		err = got_ref_open(&ref, repo, refname, 1 /* lock */);
 474 49563dfb 2023-01-28 thomas 		if (err)
 475 49563dfb 2023-01-28 thomas 			goto done;
 476 49563dfb 2023-01-28 thomas 		locked = 1;
 477 49563dfb 2023-01-28 thomas 
 478 49563dfb 2023-01-28 thomas 		err = got_ref_resolve(&id, repo, ref);
 479 49563dfb 2023-01-28 thomas 		if (err)
 480 49563dfb 2023-01-28 thomas 			goto done;
 481 49563dfb 2023-01-28 thomas 
 482 49563dfb 2023-01-28 thomas 		if (got_object_id_cmp(id, &old_id) != 0) {
 483 8a9c582b 2023-06-22 thomas 			got_object_id_hex(&old_id, hex1, sizeof(hex1));
 484 8a9c582b 2023-06-22 thomas 			got_object_id_hex(id, hex2, sizeof(hex2));
 485 49563dfb 2023-01-28 thomas 			err = got_error_fmt(GOT_ERR_REF_BUSY,
 486 8a9c582b 2023-06-22 thomas 			    "Deletion %s: %s failed; %s: %s has been "
 487 8a9c582b 2023-06-22 thomas 			    "created by someone else while transaction "
 488 8a9c582b 2023-06-22 thomas 			    "was in progress",
 489 8a9c582b 2023-06-22 thomas 			    got_ref_get_name(ref), hex1,
 490 8a9c582b 2023-06-22 thomas 			    got_ref_get_name(ref), hex2);
 491 49563dfb 2023-01-28 thomas 			goto done;
 492 49563dfb 2023-01-28 thomas 		}
 493 49563dfb 2023-01-28 thomas 
 494 49563dfb 2023-01-28 thomas 		err = got_ref_delete(ref, repo);
 495 49563dfb 2023-01-28 thomas 		if (err)
 496 49563dfb 2023-01-28 thomas 			goto done;
 497 49563dfb 2023-01-28 thomas 
 498 49563dfb 2023-01-28 thomas 		free(id);
 499 49563dfb 2023-01-28 thomas 		id = NULL;
 500 62ee7d94 2023-01-10 thomas 	} else {
 501 62ee7d94 2023-01-10 thomas 		err = got_ref_open(&ref, repo, refname, 1 /* lock */);
 502 62ee7d94 2023-01-10 thomas 		if (err)
 503 62ee7d94 2023-01-10 thomas 			goto done;
 504 62ee7d94 2023-01-10 thomas 		locked = 1;
 505 62ee7d94 2023-01-10 thomas 
 506 62ee7d94 2023-01-10 thomas 		err = got_ref_resolve(&id, repo, ref);
 507 62ee7d94 2023-01-10 thomas 		if (err)
 508 62ee7d94 2023-01-10 thomas 			goto done;
 509 62ee7d94 2023-01-10 thomas 
 510 62ee7d94 2023-01-10 thomas 		if (got_object_id_cmp(id, &old_id) != 0) {
 511 8a9c582b 2023-06-22 thomas 			got_object_id_hex(&old_id, hex1, sizeof(hex1));
 512 8a9c582b 2023-06-22 thomas 			got_object_id_hex(id, hex2, sizeof(hex2));
 513 62ee7d94 2023-01-10 thomas 			err = got_error_fmt(GOT_ERR_REF_BUSY,
 514 8a9c582b 2023-06-22 thomas 			    "Update %s: %s failed; %s: %s has been "
 515 8a9c582b 2023-06-22 thomas 			    "created by someone else while transaction "
 516 8a9c582b 2023-06-22 thomas 			    "was in progress",
 517 8a9c582b 2023-06-22 thomas 			    got_ref_get_name(ref), hex1,
 518 8a9c582b 2023-06-22 thomas 			    got_ref_get_name(ref), hex2);
 519 62ee7d94 2023-01-10 thomas 			goto done;
 520 62ee7d94 2023-01-10 thomas 		}
 521 62ee7d94 2023-01-10 thomas 
 522 169def41 2023-06-22 thomas 		if (got_object_id_cmp(&new_id, &old_id) != 0) {
 523 169def41 2023-06-22 thomas 			err = got_ref_change_ref(ref, &new_id);
 524 169def41 2023-06-22 thomas 			if (err)
 525 169def41 2023-06-22 thomas 				goto done;
 526 62ee7d94 2023-01-10 thomas 
 527 169def41 2023-06-22 thomas 			err = got_ref_write(ref, repo);
 528 169def41 2023-06-22 thomas 			if (err)
 529 169def41 2023-06-22 thomas 				goto done;
 530 169def41 2023-06-22 thomas 		}
 531 62ee7d94 2023-01-10 thomas 
 532 62ee7d94 2023-01-10 thomas 		free(id);
 533 62ee7d94 2023-01-10 thomas 		id = NULL;
 534 62ee7d94 2023-01-10 thomas 	}
 535 62ee7d94 2023-01-10 thomas done:
 536 62ee7d94 2023-01-10 thomas 	if (err) {
 537 62ee7d94 2023-01-10 thomas 		if (err->code == GOT_ERR_LOCKFILE_TIMEOUT) {
 538 62ee7d94 2023-01-10 thomas 			err = got_error_fmt(GOT_ERR_LOCKFILE_TIMEOUT,
 539 62ee7d94 2023-01-10 thomas 			    "could not acquire exclusive file lock for %s",
 540 62ee7d94 2023-01-10 thomas 			    refname);
 541 62ee7d94 2023-01-10 thomas 		}
 542 62ee7d94 2023-01-10 thomas 		send_ref_update_ng(client, &iref, refname, err->msg);
 543 62ee7d94 2023-01-10 thomas 	} else
 544 62ee7d94 2023-01-10 thomas 		send_ref_update_ok(client, &iref, refname);
 545 62ee7d94 2023-01-10 thomas 
 546 62ee7d94 2023-01-10 thomas 	if (client->nref_updates > 0) {
 547 62ee7d94 2023-01-10 thomas 		client->nref_updates--;
 548 d98779cd 2023-01-19 thomas 		if (client->nref_updates == 0) {
 549 62ee7d94 2023-01-10 thomas 			send_refs_updated(client);
 550 c8b73ac1 2023-08-23 thomas 			client->flush_disconnect = 1;
 551 d98779cd 2023-01-19 thomas 		}
 552 62ee7d94 2023-01-10 thomas 
 553 62ee7d94 2023-01-10 thomas 	}
 554 62ee7d94 2023-01-10 thomas 	if (locked) {
 555 62ee7d94 2023-01-10 thomas 		const struct got_error *unlock_err;
 556 62ee7d94 2023-01-10 thomas 		unlock_err = got_ref_unlock(ref);
 557 62ee7d94 2023-01-10 thomas 		if (unlock_err && err == NULL)
 558 62ee7d94 2023-01-10 thomas 			err = unlock_err;
 559 62ee7d94 2023-01-10 thomas 	}
 560 62ee7d94 2023-01-10 thomas 	if (ref)
 561 62ee7d94 2023-01-10 thomas 		got_ref_close(ref);
 562 62ee7d94 2023-01-10 thomas 	if (obj)
 563 62ee7d94 2023-01-10 thomas 		got_object_close(obj);
 564 62ee7d94 2023-01-10 thomas 	if (repo)
 565 62ee7d94 2023-01-10 thomas 		got_repo_close(repo);
 566 62ee7d94 2023-01-10 thomas 	free(refname);
 567 62ee7d94 2023-01-10 thomas 	free(id);
 568 62ee7d94 2023-01-10 thomas 	return err;
 569 62ee7d94 2023-01-10 thomas }
 570 62ee7d94 2023-01-10 thomas 
 571 62ee7d94 2023-01-10 thomas static void
 572 62ee7d94 2023-01-10 thomas session_dispatch_repo_child(int fd, short event, void *arg)
 573 62ee7d94 2023-01-10 thomas {
 574 62ee7d94 2023-01-10 thomas 	struct gotd_imsgev *iev = arg;
 575 62ee7d94 2023-01-10 thomas 	struct imsgbuf *ibuf = &iev->ibuf;
 576 62ee7d94 2023-01-10 thomas 	struct gotd_session_client *client = &gotd_session_client;
 577 62ee7d94 2023-01-10 thomas 	ssize_t n;
 578 62ee7d94 2023-01-10 thomas 	int shut = 0;
 579 62ee7d94 2023-01-10 thomas 	struct imsg imsg;
 580 62ee7d94 2023-01-10 thomas 
 581 62ee7d94 2023-01-10 thomas 	if (event & EV_READ) {
 582 62ee7d94 2023-01-10 thomas 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
 583 62ee7d94 2023-01-10 thomas 			fatal("imsg_read error");
 584 62ee7d94 2023-01-10 thomas 		if (n == 0) {
 585 62ee7d94 2023-01-10 thomas 			/* Connection closed. */
 586 62ee7d94 2023-01-10 thomas 			shut = 1;
 587 62ee7d94 2023-01-10 thomas 			goto done;
 588 62ee7d94 2023-01-10 thomas 		}
 589 62ee7d94 2023-01-10 thomas 	}
 590 62ee7d94 2023-01-10 thomas 
 591 62ee7d94 2023-01-10 thomas 	if (event & EV_WRITE) {
 592 62ee7d94 2023-01-10 thomas 		n = msgbuf_write(&ibuf->w);
 593 62ee7d94 2023-01-10 thomas 		if (n == -1 && errno != EAGAIN)
 594 62ee7d94 2023-01-10 thomas 			fatal("msgbuf_write");
 595 62ee7d94 2023-01-10 thomas 		if (n == 0) {
 596 62ee7d94 2023-01-10 thomas 			/* Connection closed. */
 597 62ee7d94 2023-01-10 thomas 			shut = 1;
 598 62ee7d94 2023-01-10 thomas 			goto done;
 599 62ee7d94 2023-01-10 thomas 		}
 600 62ee7d94 2023-01-10 thomas 	}
 601 62ee7d94 2023-01-10 thomas 
 602 62ee7d94 2023-01-10 thomas 	for (;;) {
 603 62ee7d94 2023-01-10 thomas 		const struct got_error *err = NULL;
 604 62ee7d94 2023-01-10 thomas 		uint32_t client_id = 0;
 605 62ee7d94 2023-01-10 thomas 		int do_disconnect = 0;
 606 62ee7d94 2023-01-10 thomas 		int do_ref_updates = 0, do_ref_update = 0;
 607 62ee7d94 2023-01-10 thomas 		int do_packfile_install = 0;
 608 62ee7d94 2023-01-10 thomas 
 609 62ee7d94 2023-01-10 thomas 		if ((n = imsg_get(ibuf, &imsg)) == -1)
 610 62ee7d94 2023-01-10 thomas 			fatal("%s: imsg_get error", __func__);
 611 62ee7d94 2023-01-10 thomas 		if (n == 0)	/* No more messages. */
 612 62ee7d94 2023-01-10 thomas 			break;
 613 62ee7d94 2023-01-10 thomas 
 614 62ee7d94 2023-01-10 thomas 		switch (imsg.hdr.type) {
 615 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_ERROR:
 616 62ee7d94 2023-01-10 thomas 			do_disconnect = 1;
 617 62ee7d94 2023-01-10 thomas 			err = gotd_imsg_recv_error(&client_id, &imsg);
 618 62ee7d94 2023-01-10 thomas 			break;
 619 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_PACKFILE_DONE:
 620 62ee7d94 2023-01-10 thomas 			do_disconnect = 1;
 621 62ee7d94 2023-01-10 thomas 			err = recv_packfile_done(&client_id, &imsg);
 622 62ee7d94 2023-01-10 thomas 			break;
 623 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_PACKFILE_INSTALL:
 624 62ee7d94 2023-01-10 thomas 			err = recv_packfile_install(&client_id, &imsg);
 625 62ee7d94 2023-01-10 thomas 			if (err == NULL)
 626 62ee7d94 2023-01-10 thomas 				do_packfile_install = 1;
 627 62ee7d94 2023-01-10 thomas 			break;
 628 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_REF_UPDATES_START:
 629 62ee7d94 2023-01-10 thomas 			err = recv_ref_updates_start(&client_id, &imsg);
 630 62ee7d94 2023-01-10 thomas 			if (err == NULL)
 631 62ee7d94 2023-01-10 thomas 				do_ref_updates = 1;
 632 62ee7d94 2023-01-10 thomas 			break;
 633 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_REF_UPDATE:
 634 62ee7d94 2023-01-10 thomas 			err = recv_ref_update(&client_id, &imsg);
 635 62ee7d94 2023-01-10 thomas 			if (err == NULL)
 636 62ee7d94 2023-01-10 thomas 				do_ref_update = 1;
 637 62ee7d94 2023-01-10 thomas 			break;
 638 62ee7d94 2023-01-10 thomas 		default:
 639 62ee7d94 2023-01-10 thomas 			log_debug("unexpected imsg %d", imsg.hdr.type);
 640 62ee7d94 2023-01-10 thomas 			break;
 641 62ee7d94 2023-01-10 thomas 		}
 642 62ee7d94 2023-01-10 thomas 
 643 62ee7d94 2023-01-10 thomas 		if (do_disconnect) {
 644 62ee7d94 2023-01-10 thomas 			if (err)
 645 62ee7d94 2023-01-10 thomas 				disconnect_on_error(client, err);
 646 62ee7d94 2023-01-10 thomas 			else
 647 62ee7d94 2023-01-10 thomas 				disconnect(client);
 648 62ee7d94 2023-01-10 thomas 		} else {
 649 62ee7d94 2023-01-10 thomas 			if (do_packfile_install)
 650 62ee7d94 2023-01-10 thomas 				err = install_pack(client,
 651 62ee7d94 2023-01-10 thomas 				    gotd_session.repo->path, &imsg);
 652 62ee7d94 2023-01-10 thomas 			else if (do_ref_updates)
 653 62ee7d94 2023-01-10 thomas 				err = begin_ref_updates(client, &imsg);
 654 62ee7d94 2023-01-10 thomas 			else if (do_ref_update)
 655 d98779cd 2023-01-19 thomas 				err = update_ref(&shut, client,
 656 62ee7d94 2023-01-10 thomas 				    gotd_session.repo->path, &imsg);
 657 62ee7d94 2023-01-10 thomas 			if (err)
 658 62ee7d94 2023-01-10 thomas 				log_warnx("uid %d: %s", client->euid, err->msg);
 659 62ee7d94 2023-01-10 thomas 		}
 660 62ee7d94 2023-01-10 thomas 		imsg_free(&imsg);
 661 62ee7d94 2023-01-10 thomas 	}
 662 62ee7d94 2023-01-10 thomas done:
 663 62ee7d94 2023-01-10 thomas 	if (!shut) {
 664 62ee7d94 2023-01-10 thomas 		gotd_imsg_event_add(iev);
 665 62ee7d94 2023-01-10 thomas 	} else {
 666 62ee7d94 2023-01-10 thomas 		/* This pipe is dead. Remove its event handler */
 667 62ee7d94 2023-01-10 thomas 		event_del(&iev->ev);
 668 62ee7d94 2023-01-10 thomas 		event_loopexit(NULL);
 669 62ee7d94 2023-01-10 thomas 	}
 670 62ee7d94 2023-01-10 thomas }
 671 62ee7d94 2023-01-10 thomas 
 672 62ee7d94 2023-01-10 thomas static const struct got_error *
 673 62ee7d94 2023-01-10 thomas recv_capabilities(struct gotd_session_client *client, struct imsg *imsg)
 674 62ee7d94 2023-01-10 thomas {
 675 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_capabilities icapas;
 676 62ee7d94 2023-01-10 thomas 	size_t datalen;
 677 62ee7d94 2023-01-10 thomas 
 678 62ee7d94 2023-01-10 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 679 62ee7d94 2023-01-10 thomas 	if (datalen != sizeof(icapas))
 680 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 681 62ee7d94 2023-01-10 thomas 	memcpy(&icapas, imsg->data, sizeof(icapas));
 682 62ee7d94 2023-01-10 thomas 
 683 62ee7d94 2023-01-10 thomas 	client->ncapa_alloc = icapas.ncapabilities;
 684 62ee7d94 2023-01-10 thomas 	client->capabilities = calloc(client->ncapa_alloc,
 685 62ee7d94 2023-01-10 thomas 	    sizeof(*client->capabilities));
 686 62ee7d94 2023-01-10 thomas 	if (client->capabilities == NULL) {
 687 62ee7d94 2023-01-10 thomas 		client->ncapa_alloc = 0;
 688 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("calloc");
 689 62ee7d94 2023-01-10 thomas 	}
 690 62ee7d94 2023-01-10 thomas 
 691 62ee7d94 2023-01-10 thomas 	log_debug("expecting %zu capabilities from uid %d",
 692 62ee7d94 2023-01-10 thomas 	    client->ncapa_alloc, client->euid);
 693 62ee7d94 2023-01-10 thomas 	return NULL;
 694 62ee7d94 2023-01-10 thomas }
 695 62ee7d94 2023-01-10 thomas 
 696 62ee7d94 2023-01-10 thomas static const struct got_error *
 697 62ee7d94 2023-01-10 thomas recv_capability(struct gotd_session_client *client, struct imsg *imsg)
 698 62ee7d94 2023-01-10 thomas {
 699 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_capability icapa;
 700 62ee7d94 2023-01-10 thomas 	struct gotd_client_capability *capa;
 701 62ee7d94 2023-01-10 thomas 	size_t datalen;
 702 62ee7d94 2023-01-10 thomas 	char *key, *value = NULL;
 703 62ee7d94 2023-01-10 thomas 
 704 62ee7d94 2023-01-10 thomas 	if (client->capabilities == NULL ||
 705 62ee7d94 2023-01-10 thomas 	    client->ncapabilities >= client->ncapa_alloc) {
 706 62ee7d94 2023-01-10 thomas 		return got_error_msg(GOT_ERR_BAD_REQUEST,
 707 62ee7d94 2023-01-10 thomas 		    "unexpected capability received");
 708 62ee7d94 2023-01-10 thomas 	}
 709 62ee7d94 2023-01-10 thomas 
 710 62ee7d94 2023-01-10 thomas 	memset(&icapa, 0, sizeof(icapa));
 711 62ee7d94 2023-01-10 thomas 
 712 62ee7d94 2023-01-10 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 713 62ee7d94 2023-01-10 thomas 	if (datalen < sizeof(icapa))
 714 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 715 62ee7d94 2023-01-10 thomas 	memcpy(&icapa, imsg->data, sizeof(icapa));
 716 62ee7d94 2023-01-10 thomas 
 717 62ee7d94 2023-01-10 thomas 	if (datalen != sizeof(icapa) + icapa.key_len + icapa.value_len)
 718 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 719 62ee7d94 2023-01-10 thomas 
 720 fcbb06bf 2023-01-14 thomas 	key = strndup(imsg->data + sizeof(icapa), icapa.key_len);
 721 62ee7d94 2023-01-10 thomas 	if (key == NULL)
 722 fcbb06bf 2023-01-14 thomas 		return got_error_from_errno("strndup");
 723 62ee7d94 2023-01-10 thomas 	if (icapa.value_len > 0) {
 724 fcbb06bf 2023-01-14 thomas 		value = strndup(imsg->data + sizeof(icapa) + icapa.key_len,
 725 fcbb06bf 2023-01-14 thomas 		    icapa.value_len);
 726 62ee7d94 2023-01-10 thomas 		if (value == NULL) {
 727 62ee7d94 2023-01-10 thomas 			free(key);
 728 fcbb06bf 2023-01-14 thomas 			return got_error_from_errno("strndup");
 729 62ee7d94 2023-01-10 thomas 		}
 730 62ee7d94 2023-01-10 thomas 	}
 731 62ee7d94 2023-01-10 thomas 
 732 62ee7d94 2023-01-10 thomas 	capa = &client->capabilities[client->ncapabilities++];
 733 62ee7d94 2023-01-10 thomas 	capa->key = key;
 734 62ee7d94 2023-01-10 thomas 	capa->value = value;
 735 62ee7d94 2023-01-10 thomas 
 736 62ee7d94 2023-01-10 thomas 	if (value)
 737 62ee7d94 2023-01-10 thomas 		log_debug("uid %d: capability %s=%s", client->euid, key, value);
 738 62ee7d94 2023-01-10 thomas 	else
 739 62ee7d94 2023-01-10 thomas 		log_debug("uid %d: capability %s", client->euid, key);
 740 62ee7d94 2023-01-10 thomas 
 741 62ee7d94 2023-01-10 thomas 	return NULL;
 742 62ee7d94 2023-01-10 thomas }
 743 62ee7d94 2023-01-10 thomas 
 744 62ee7d94 2023-01-10 thomas static const struct got_error *
 745 62ee7d94 2023-01-10 thomas ensure_client_is_reading(struct gotd_session_client *client)
 746 62ee7d94 2023-01-10 thomas {
 747 62ee7d94 2023-01-10 thomas 	if (client->is_writing) {
 748 62ee7d94 2023-01-10 thomas 		return got_error_fmt(GOT_ERR_BAD_PACKET,
 749 62ee7d94 2023-01-10 thomas 		    "uid %d made a read-request but is not reading from "
 750 62ee7d94 2023-01-10 thomas 		    "a repository", client->euid);
 751 62ee7d94 2023-01-10 thomas 	}
 752 62ee7d94 2023-01-10 thomas 
 753 62ee7d94 2023-01-10 thomas 	return NULL;
 754 62ee7d94 2023-01-10 thomas }
 755 62ee7d94 2023-01-10 thomas 
 756 62ee7d94 2023-01-10 thomas static const struct got_error *
 757 62ee7d94 2023-01-10 thomas ensure_client_is_writing(struct gotd_session_client *client)
 758 62ee7d94 2023-01-10 thomas {
 759 62ee7d94 2023-01-10 thomas 	if (!client->is_writing) {
 760 62ee7d94 2023-01-10 thomas 		return got_error_fmt(GOT_ERR_BAD_PACKET,
 761 62ee7d94 2023-01-10 thomas 		    "uid %d made a write-request but is not writing to "
 762 62ee7d94 2023-01-10 thomas 		    "a repository", client->euid);
 763 62ee7d94 2023-01-10 thomas 	}
 764 62ee7d94 2023-01-10 thomas 
 765 62ee7d94 2023-01-10 thomas 	return NULL;
 766 62ee7d94 2023-01-10 thomas }
 767 62ee7d94 2023-01-10 thomas 
 768 62ee7d94 2023-01-10 thomas static const struct got_error *
 769 62ee7d94 2023-01-10 thomas forward_want(struct gotd_session_client *client, struct imsg *imsg)
 770 62ee7d94 2023-01-10 thomas {
 771 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_want ireq;
 772 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_want iwant;
 773 62ee7d94 2023-01-10 thomas 	size_t datalen;
 774 62ee7d94 2023-01-10 thomas 
 775 62ee7d94 2023-01-10 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 776 62ee7d94 2023-01-10 thomas 	if (datalen != sizeof(ireq))
 777 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 778 62ee7d94 2023-01-10 thomas 
 779 62ee7d94 2023-01-10 thomas 	memcpy(&ireq, imsg->data, datalen);
 780 62ee7d94 2023-01-10 thomas 
 781 62ee7d94 2023-01-10 thomas 	memset(&iwant, 0, sizeof(iwant));
 782 62ee7d94 2023-01-10 thomas 	memcpy(iwant.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
 783 62ee7d94 2023-01-10 thomas 	iwant.client_id = client->id;
 784 62ee7d94 2023-01-10 thomas 
 785 62ee7d94 2023-01-10 thomas 	if (gotd_imsg_compose_event(&client->repo_child_iev, GOTD_IMSG_WANT,
 786 7fed8fa4 2023-06-22 thomas 	    gotd_session.proc_id, -1, &iwant, sizeof(iwant)) == -1)
 787 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("imsg compose WANT");
 788 62ee7d94 2023-01-10 thomas 
 789 62ee7d94 2023-01-10 thomas 	return NULL;
 790 62ee7d94 2023-01-10 thomas }
 791 62ee7d94 2023-01-10 thomas 
 792 62ee7d94 2023-01-10 thomas static const struct got_error *
 793 62ee7d94 2023-01-10 thomas forward_ref_update(struct gotd_session_client *client, struct imsg *imsg)
 794 62ee7d94 2023-01-10 thomas {
 795 62ee7d94 2023-01-10 thomas 	const struct got_error *err = NULL;
 796 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_ref_update ireq;
 797 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_ref_update *iref = NULL;
 798 62ee7d94 2023-01-10 thomas 	size_t datalen;
 799 62ee7d94 2023-01-10 thomas 
 800 62ee7d94 2023-01-10 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 801 62ee7d94 2023-01-10 thomas 	if (datalen < sizeof(ireq))
 802 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 803 62ee7d94 2023-01-10 thomas 	memcpy(&ireq, imsg->data, sizeof(ireq));
 804 62ee7d94 2023-01-10 thomas 	if (datalen != sizeof(ireq) + ireq.name_len)
 805 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 806 62ee7d94 2023-01-10 thomas 
 807 62ee7d94 2023-01-10 thomas 	iref = malloc(datalen);
 808 62ee7d94 2023-01-10 thomas 	if (iref == NULL)
 809 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("malloc");
 810 62ee7d94 2023-01-10 thomas 	memcpy(iref, imsg->data, datalen);
 811 62ee7d94 2023-01-10 thomas 
 812 62ee7d94 2023-01-10 thomas 	iref->client_id = client->id;
 813 62ee7d94 2023-01-10 thomas 	if (gotd_imsg_compose_event(&client->repo_child_iev,
 814 7fed8fa4 2023-06-22 thomas 	    GOTD_IMSG_REF_UPDATE, gotd_session.proc_id, -1,
 815 7fed8fa4 2023-06-22 thomas 	    iref, datalen) == -1)
 816 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("imsg compose REF_UPDATE");
 817 62ee7d94 2023-01-10 thomas 	free(iref);
 818 62ee7d94 2023-01-10 thomas 	return err;
 819 62ee7d94 2023-01-10 thomas }
 820 62ee7d94 2023-01-10 thomas 
 821 62ee7d94 2023-01-10 thomas static const struct got_error *
 822 62ee7d94 2023-01-10 thomas forward_have(struct gotd_session_client *client, struct imsg *imsg)
 823 62ee7d94 2023-01-10 thomas {
 824 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_have ireq;
 825 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_have ihave;
 826 62ee7d94 2023-01-10 thomas 	size_t datalen;
 827 62ee7d94 2023-01-10 thomas 
 828 62ee7d94 2023-01-10 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 829 62ee7d94 2023-01-10 thomas 	if (datalen != sizeof(ireq))
 830 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
 831 62ee7d94 2023-01-10 thomas 
 832 62ee7d94 2023-01-10 thomas 	memcpy(&ireq, imsg->data, datalen);
 833 62ee7d94 2023-01-10 thomas 
 834 62ee7d94 2023-01-10 thomas 	memset(&ihave, 0, sizeof(ihave));
 835 62ee7d94 2023-01-10 thomas 	memcpy(ihave.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
 836 62ee7d94 2023-01-10 thomas 	ihave.client_id = client->id;
 837 62ee7d94 2023-01-10 thomas 
 838 62ee7d94 2023-01-10 thomas 	if (gotd_imsg_compose_event(&client->repo_child_iev, GOTD_IMSG_HAVE,
 839 7fed8fa4 2023-06-22 thomas 	    gotd_session.proc_id, -1, &ihave, sizeof(ihave)) == -1)
 840 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("imsg compose HAVE");
 841 62ee7d94 2023-01-10 thomas 
 842 62ee7d94 2023-01-10 thomas 	return NULL;
 843 62ee7d94 2023-01-10 thomas }
 844 62ee7d94 2023-01-10 thomas 
 845 62ee7d94 2023-01-10 thomas static int
 846 62ee7d94 2023-01-10 thomas client_has_capability(struct gotd_session_client *client, const char *capastr)
 847 62ee7d94 2023-01-10 thomas {
 848 62ee7d94 2023-01-10 thomas 	struct gotd_client_capability *capa;
 849 62ee7d94 2023-01-10 thomas 	size_t i;
 850 62ee7d94 2023-01-10 thomas 
 851 62ee7d94 2023-01-10 thomas 	if (client->ncapabilities == 0)
 852 62ee7d94 2023-01-10 thomas 		return 0;
 853 62ee7d94 2023-01-10 thomas 
 854 62ee7d94 2023-01-10 thomas 	for (i = 0; i < client->ncapabilities; i++) {
 855 62ee7d94 2023-01-10 thomas 		capa = &client->capabilities[i];
 856 62ee7d94 2023-01-10 thomas 		if (strcmp(capa->key, capastr) == 0)
 857 62ee7d94 2023-01-10 thomas 			return 1;
 858 62ee7d94 2023-01-10 thomas 	}
 859 62ee7d94 2023-01-10 thomas 
 860 62ee7d94 2023-01-10 thomas 	return 0;
 861 62ee7d94 2023-01-10 thomas }
 862 62ee7d94 2023-01-10 thomas 
 863 62ee7d94 2023-01-10 thomas static const struct got_error *
 864 62ee7d94 2023-01-10 thomas recv_packfile(struct gotd_session_client *client)
 865 62ee7d94 2023-01-10 thomas {
 866 62ee7d94 2023-01-10 thomas 	const struct got_error *err = NULL;
 867 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_recv_packfile ipack;
 868 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_packfile_pipe ipipe;
 869 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_packidx_file ifile;
 870 62ee7d94 2023-01-10 thomas 	char *basepath = NULL, *pack_path = NULL, *idx_path = NULL;
 871 62ee7d94 2023-01-10 thomas 	int packfd = -1, idxfd = -1;
 872 62ee7d94 2023-01-10 thomas 	int pipe[2] = { -1, -1 };
 873 62ee7d94 2023-01-10 thomas 
 874 62ee7d94 2023-01-10 thomas 	if (client->packfile_path) {
 875 62ee7d94 2023-01-10 thomas 		return got_error_fmt(GOT_ERR_PRIVSEP_MSG,
 876 62ee7d94 2023-01-10 thomas 		    "uid %d already has a pack file", client->euid);
 877 62ee7d94 2023-01-10 thomas 	}
 878 62ee7d94 2023-01-10 thomas 
 879 62ee7d94 2023-01-10 thomas 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
 880 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("socketpair");
 881 62ee7d94 2023-01-10 thomas 
 882 62ee7d94 2023-01-10 thomas 	memset(&ipipe, 0, sizeof(ipipe));
 883 62ee7d94 2023-01-10 thomas 	ipipe.client_id = client->id;
 884 62ee7d94 2023-01-10 thomas 
 885 62ee7d94 2023-01-10 thomas 	/* Send pack pipe end 0 to repo child process. */
 886 62ee7d94 2023-01-10 thomas 	if (gotd_imsg_compose_event(&client->repo_child_iev,
 887 7fed8fa4 2023-06-22 thomas 	    GOTD_IMSG_PACKFILE_PIPE, gotd_session.proc_id, pipe[0],
 888 62ee7d94 2023-01-10 thomas 	        &ipipe, sizeof(ipipe)) == -1) {
 889 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
 890 62ee7d94 2023-01-10 thomas 		pipe[0] = -1;
 891 62ee7d94 2023-01-10 thomas 		goto done;
 892 62ee7d94 2023-01-10 thomas 	}
 893 62ee7d94 2023-01-10 thomas 	pipe[0] = -1;
 894 62ee7d94 2023-01-10 thomas 
 895 62ee7d94 2023-01-10 thomas 	/* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
 896 62ee7d94 2023-01-10 thomas 	if (gotd_imsg_compose_event(&client->iev,
 897 7fed8fa4 2023-06-22 thomas 	    GOTD_IMSG_PACKFILE_PIPE, gotd_session.proc_id, pipe[1],
 898 7fed8fa4 2023-06-22 thomas 	    NULL, 0) == -1)
 899 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
 900 62ee7d94 2023-01-10 thomas 	pipe[1] = -1;
 901 62ee7d94 2023-01-10 thomas 
 902 62ee7d94 2023-01-10 thomas 	if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.pack",
 903 62ee7d94 2023-01-10 thomas 	    got_repo_get_path(gotd_session.repo), GOT_OBJECTS_PACK_DIR,
 904 62ee7d94 2023-01-10 thomas 	    client->euid) == -1) {
 905 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("asprintf");
 906 62ee7d94 2023-01-10 thomas 		goto done;
 907 62ee7d94 2023-01-10 thomas 	}
 908 62ee7d94 2023-01-10 thomas 
 909 62ee7d94 2023-01-10 thomas 	err = got_opentemp_named_fd(&pack_path, &packfd, basepath, "");
 910 62ee7d94 2023-01-10 thomas 	if (err)
 911 62ee7d94 2023-01-10 thomas 		goto done;
 912 851a5b48 2023-02-03 thomas 	if (fchmod(packfd, GOT_DEFAULT_PACK_MODE) == -1) {
 913 851a5b48 2023-02-03 thomas 		err = got_error_from_errno2("fchmod", pack_path);
 914 851a5b48 2023-02-03 thomas 		goto done;
 915 851a5b48 2023-02-03 thomas 	}
 916 62ee7d94 2023-01-10 thomas 
 917 62ee7d94 2023-01-10 thomas 	free(basepath);
 918 62ee7d94 2023-01-10 thomas 	if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.idx",
 919 62ee7d94 2023-01-10 thomas 	    got_repo_get_path(gotd_session.repo), GOT_OBJECTS_PACK_DIR,
 920 62ee7d94 2023-01-10 thomas 	    client->euid) == -1) {
 921 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("asprintf");
 922 62ee7d94 2023-01-10 thomas 		basepath = NULL;
 923 62ee7d94 2023-01-10 thomas 		goto done;
 924 62ee7d94 2023-01-10 thomas 	}
 925 62ee7d94 2023-01-10 thomas 	err = got_opentemp_named_fd(&idx_path, &idxfd, basepath, "");
 926 62ee7d94 2023-01-10 thomas 	if (err)
 927 62ee7d94 2023-01-10 thomas 		goto done;
 928 851a5b48 2023-02-03 thomas 	if (fchmod(idxfd, GOT_DEFAULT_PACK_MODE) == -1) {
 929 851a5b48 2023-02-03 thomas 		err = got_error_from_errno2("fchmod", idx_path);
 930 851a5b48 2023-02-03 thomas 		goto done;
 931 851a5b48 2023-02-03 thomas 	}
 932 62ee7d94 2023-01-10 thomas 
 933 62ee7d94 2023-01-10 thomas 	memset(&ifile, 0, sizeof(ifile));
 934 62ee7d94 2023-01-10 thomas 	ifile.client_id = client->id;
 935 62ee7d94 2023-01-10 thomas 	if (gotd_imsg_compose_event(&client->repo_child_iev,
 936 7fed8fa4 2023-06-22 thomas 	    GOTD_IMSG_PACKIDX_FILE, gotd_session.proc_id,
 937 62ee7d94 2023-01-10 thomas 	    idxfd, &ifile, sizeof(ifile)) == -1) {
 938 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("imsg compose PACKIDX_FILE");
 939 62ee7d94 2023-01-10 thomas 		idxfd = -1;
 940 62ee7d94 2023-01-10 thomas 		goto done;
 941 62ee7d94 2023-01-10 thomas 	}
 942 62ee7d94 2023-01-10 thomas 	idxfd = -1;
 943 62ee7d94 2023-01-10 thomas 
 944 62ee7d94 2023-01-10 thomas 	memset(&ipack, 0, sizeof(ipack));
 945 62ee7d94 2023-01-10 thomas 	ipack.client_id = client->id;
 946 62ee7d94 2023-01-10 thomas 	if (client_has_capability(client, GOT_CAPA_REPORT_STATUS))
 947 62ee7d94 2023-01-10 thomas 		ipack.report_status = 1;
 948 62ee7d94 2023-01-10 thomas 
 949 62ee7d94 2023-01-10 thomas 	if (gotd_imsg_compose_event(&client->repo_child_iev,
 950 7fed8fa4 2023-06-22 thomas 	    GOTD_IMSG_RECV_PACKFILE, gotd_session.proc_id, packfd,
 951 62ee7d94 2023-01-10 thomas 	    &ipack, sizeof(ipack)) == -1) {
 952 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("imsg compose RECV_PACKFILE");
 953 62ee7d94 2023-01-10 thomas 		packfd = -1;
 954 62ee7d94 2023-01-10 thomas 		goto done;
 955 62ee7d94 2023-01-10 thomas 	}
 956 62ee7d94 2023-01-10 thomas 	packfd = -1;
 957 62ee7d94 2023-01-10 thomas 
 958 62ee7d94 2023-01-10 thomas done:
 959 62ee7d94 2023-01-10 thomas 	free(basepath);
 960 62ee7d94 2023-01-10 thomas 	if (pipe[0] != -1 && close(pipe[0]) == -1 && err == NULL)
 961 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("close");
 962 62ee7d94 2023-01-10 thomas 	if (pipe[1] != -1 && close(pipe[1]) == -1 && err == NULL)
 963 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("close");
 964 62ee7d94 2023-01-10 thomas 	if (packfd != -1 && close(packfd) == -1 && err == NULL)
 965 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("close");
 966 62ee7d94 2023-01-10 thomas 	if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
 967 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("close");
 968 62ee7d94 2023-01-10 thomas 	if (err) {
 969 62ee7d94 2023-01-10 thomas 		free(pack_path);
 970 62ee7d94 2023-01-10 thomas 		free(idx_path);
 971 62ee7d94 2023-01-10 thomas 	} else {
 972 62ee7d94 2023-01-10 thomas 		client->packfile_path = pack_path;
 973 62ee7d94 2023-01-10 thomas 		client->packidx_path = idx_path;
 974 62ee7d94 2023-01-10 thomas 	}
 975 62ee7d94 2023-01-10 thomas 	return err;
 976 62ee7d94 2023-01-10 thomas }
 977 62ee7d94 2023-01-10 thomas 
 978 62ee7d94 2023-01-10 thomas static const struct got_error *
 979 62ee7d94 2023-01-10 thomas send_packfile(struct gotd_session_client *client)
 980 62ee7d94 2023-01-10 thomas {
 981 62ee7d94 2023-01-10 thomas 	const struct got_error *err = NULL;
 982 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_send_packfile ipack;
 983 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_packfile_pipe ipipe;
 984 62ee7d94 2023-01-10 thomas 	int pipe[2];
 985 62ee7d94 2023-01-10 thomas 
 986 62ee7d94 2023-01-10 thomas 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
 987 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("socketpair");
 988 62ee7d94 2023-01-10 thomas 
 989 62ee7d94 2023-01-10 thomas 	memset(&ipack, 0, sizeof(ipack));
 990 62ee7d94 2023-01-10 thomas 	memset(&ipipe, 0, sizeof(ipipe));
 991 62ee7d94 2023-01-10 thomas 
 992 62ee7d94 2023-01-10 thomas 	ipack.client_id = client->id;
 993 62ee7d94 2023-01-10 thomas 	if (client_has_capability(client, GOT_CAPA_SIDE_BAND_64K))
 994 62ee7d94 2023-01-10 thomas 		ipack.report_progress = 1;
 995 62ee7d94 2023-01-10 thomas 
 996 62ee7d94 2023-01-10 thomas 	client->delta_cache_fd = got_opentempfd();
 997 62ee7d94 2023-01-10 thomas 	if (client->delta_cache_fd == -1)
 998 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("got_opentempfd");
 999 62ee7d94 2023-01-10 thomas 
1000 62ee7d94 2023-01-10 thomas 	if (gotd_imsg_compose_event(&client->repo_child_iev,
1001 62ee7d94 2023-01-10 thomas 	    GOTD_IMSG_SEND_PACKFILE, PROC_GOTD, client->delta_cache_fd,
1002 62ee7d94 2023-01-10 thomas 	    &ipack, sizeof(ipack)) == -1) {
1003 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("imsg compose SEND_PACKFILE");
1004 62ee7d94 2023-01-10 thomas 		close(pipe[0]);
1005 62ee7d94 2023-01-10 thomas 		close(pipe[1]);
1006 62ee7d94 2023-01-10 thomas 		return err;
1007 62ee7d94 2023-01-10 thomas 	}
1008 62ee7d94 2023-01-10 thomas 
1009 62ee7d94 2023-01-10 thomas 	ipipe.client_id = client->id;
1010 62ee7d94 2023-01-10 thomas 
1011 62ee7d94 2023-01-10 thomas 	/* Send pack pipe end 0 to repo child process. */
1012 62ee7d94 2023-01-10 thomas 	if (gotd_imsg_compose_event(&client->repo_child_iev,
1013 62ee7d94 2023-01-10 thomas 	    GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD,
1014 62ee7d94 2023-01-10 thomas 	    pipe[0], &ipipe, sizeof(ipipe)) == -1) {
1015 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
1016 62ee7d94 2023-01-10 thomas 		close(pipe[1]);
1017 62ee7d94 2023-01-10 thomas 		return err;
1018 62ee7d94 2023-01-10 thomas 	}
1019 62ee7d94 2023-01-10 thomas 
1020 62ee7d94 2023-01-10 thomas 	/* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
1021 62ee7d94 2023-01-10 thomas 	if (gotd_imsg_compose_event(&client->iev,
1022 62ee7d94 2023-01-10 thomas 	    GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
1023 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
1024 62ee7d94 2023-01-10 thomas 
1025 62ee7d94 2023-01-10 thomas 	return err;
1026 62ee7d94 2023-01-10 thomas }
1027 62ee7d94 2023-01-10 thomas 
1028 62ee7d94 2023-01-10 thomas static void
1029 8cb46987 2023-02-07 thomas session_dispatch_client(int fd, short events, void *arg)
1030 62ee7d94 2023-01-10 thomas {
1031 62ee7d94 2023-01-10 thomas 	struct gotd_imsgev *iev = arg;
1032 62ee7d94 2023-01-10 thomas 	struct imsgbuf *ibuf = &iev->ibuf;
1033 62ee7d94 2023-01-10 thomas 	struct gotd_session_client *client = &gotd_session_client;
1034 62ee7d94 2023-01-10 thomas 	const struct got_error *err = NULL;
1035 62ee7d94 2023-01-10 thomas 	struct imsg imsg;
1036 62ee7d94 2023-01-10 thomas 	ssize_t n;
1037 62ee7d94 2023-01-10 thomas 
1038 62ee7d94 2023-01-10 thomas 	if (events & EV_WRITE) {
1039 62ee7d94 2023-01-10 thomas 		while (ibuf->w.queued) {
1040 62ee7d94 2023-01-10 thomas 			n = msgbuf_write(&ibuf->w);
1041 62ee7d94 2023-01-10 thomas 			if (n == -1 && errno == EPIPE) {
1042 62ee7d94 2023-01-10 thomas 				/*
1043 62ee7d94 2023-01-10 thomas 				 * The client has closed its socket.
1044 62ee7d94 2023-01-10 thomas 				 * This can happen when Git clients are
1045 62ee7d94 2023-01-10 thomas 				 * done sending pack file data.
1046 62ee7d94 2023-01-10 thomas 				 */
1047 62ee7d94 2023-01-10 thomas 				msgbuf_clear(&ibuf->w);
1048 62ee7d94 2023-01-10 thomas 				continue;
1049 62ee7d94 2023-01-10 thomas 			} else if (n == -1 && errno != EAGAIN) {
1050 62ee7d94 2023-01-10 thomas 				err = got_error_from_errno("imsg_flush");
1051 62ee7d94 2023-01-10 thomas 				disconnect_on_error(client, err);
1052 62ee7d94 2023-01-10 thomas 				return;
1053 62ee7d94 2023-01-10 thomas 			}
1054 62ee7d94 2023-01-10 thomas 			if (n == 0) {
1055 62ee7d94 2023-01-10 thomas 				/* Connection closed. */
1056 62ee7d94 2023-01-10 thomas 				err = got_error(GOT_ERR_EOF);
1057 62ee7d94 2023-01-10 thomas 				disconnect_on_error(client, err);
1058 62ee7d94 2023-01-10 thomas 				return;
1059 62ee7d94 2023-01-10 thomas 			}
1060 c8b73ac1 2023-08-23 thomas 		}
1061 c8b73ac1 2023-08-23 thomas 
1062 c8b73ac1 2023-08-23 thomas 		if (client->flush_disconnect) {
1063 c8b73ac1 2023-08-23 thomas 			disconnect(client);
1064 c8b73ac1 2023-08-23 thomas 			return;
1065 62ee7d94 2023-01-10 thomas 		}
1066 62ee7d94 2023-01-10 thomas 	}
1067 62ee7d94 2023-01-10 thomas 
1068 62ee7d94 2023-01-10 thomas 	if ((events & EV_READ) == 0)
1069 62ee7d94 2023-01-10 thomas 		return;
1070 62ee7d94 2023-01-10 thomas 
1071 62ee7d94 2023-01-10 thomas 	memset(&imsg, 0, sizeof(imsg));
1072 62ee7d94 2023-01-10 thomas 
1073 62ee7d94 2023-01-10 thomas 	while (err == NULL) {
1074 62ee7d94 2023-01-10 thomas 		err = gotd_imsg_recv(&imsg, ibuf, 0);
1075 62ee7d94 2023-01-10 thomas 		if (err) {
1076 62ee7d94 2023-01-10 thomas 			if (err->code == GOT_ERR_PRIVSEP_READ)
1077 62ee7d94 2023-01-10 thomas 				err = NULL;
1078 8e92c55c 2023-06-08 thomas 			else if (err->code == GOT_ERR_EOF &&
1079 8e92c55c 2023-06-08 thomas 			    client->state == GOTD_STATE_EXPECT_CAPABILITIES) {
1080 8e92c55c 2023-06-08 thomas 				/*
1081 8e92c55c 2023-06-08 thomas 				 * The client has closed its socket before
1082 8e92c55c 2023-06-08 thomas 				 * sending its capability announcement.
1083 8e92c55c 2023-06-08 thomas 				 * This can happen when Git clients have
1084 8e92c55c 2023-06-08 thomas 				 * no ref-updates to send.
1085 8e92c55c 2023-06-08 thomas 				 */
1086 8e92c55c 2023-06-08 thomas 				disconnect_on_error(client, err);
1087 8e92c55c 2023-06-08 thomas 				return;
1088 8e92c55c 2023-06-08 thomas 			}
1089 62ee7d94 2023-01-10 thomas 			break;
1090 62ee7d94 2023-01-10 thomas 		}
1091 62ee7d94 2023-01-10 thomas 
1092 62ee7d94 2023-01-10 thomas 		evtimer_del(&client->tmo);
1093 62ee7d94 2023-01-10 thomas 
1094 62ee7d94 2023-01-10 thomas 		switch (imsg.hdr.type) {
1095 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_CAPABILITIES:
1096 62ee7d94 2023-01-10 thomas 			if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1097 62ee7d94 2023-01-10 thomas 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1098 62ee7d94 2023-01-10 thomas 				    "unexpected capabilities received");
1099 62ee7d94 2023-01-10 thomas 				break;
1100 62ee7d94 2023-01-10 thomas 			}
1101 62ee7d94 2023-01-10 thomas 			log_debug("receiving capabilities from uid %d",
1102 62ee7d94 2023-01-10 thomas 			    client->euid);
1103 62ee7d94 2023-01-10 thomas 			err = recv_capabilities(client, &imsg);
1104 62ee7d94 2023-01-10 thomas 			break;
1105 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_CAPABILITY:
1106 62ee7d94 2023-01-10 thomas 			if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1107 62ee7d94 2023-01-10 thomas 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1108 62ee7d94 2023-01-10 thomas 				    "unexpected capability received");
1109 62ee7d94 2023-01-10 thomas 				break;
1110 62ee7d94 2023-01-10 thomas 			}
1111 62ee7d94 2023-01-10 thomas 			err = recv_capability(client, &imsg);
1112 62ee7d94 2023-01-10 thomas 			if (err || client->ncapabilities < client->ncapa_alloc)
1113 62ee7d94 2023-01-10 thomas 				break;
1114 62ee7d94 2023-01-10 thomas 			if (!client->is_writing) {
1115 62ee7d94 2023-01-10 thomas 				client->state = GOTD_STATE_EXPECT_WANT;
1116 98c7fd82 2023-01-23 thomas 				client->accept_flush_pkt = 1;
1117 62ee7d94 2023-01-10 thomas 				log_debug("uid %d: expecting want-lines",
1118 62ee7d94 2023-01-10 thomas 				    client->euid);
1119 62ee7d94 2023-01-10 thomas 			} else if (client->is_writing) {
1120 62ee7d94 2023-01-10 thomas 				client->state = GOTD_STATE_EXPECT_REF_UPDATE;
1121 98c7fd82 2023-01-23 thomas 				client->accept_flush_pkt = 1;
1122 62ee7d94 2023-01-10 thomas 				log_debug("uid %d: expecting ref-update-lines",
1123 62ee7d94 2023-01-10 thomas 				    client->euid);
1124 62ee7d94 2023-01-10 thomas 			} else
1125 62ee7d94 2023-01-10 thomas 				fatalx("client %d is both reading and writing",
1126 62ee7d94 2023-01-10 thomas 				    client->euid);
1127 62ee7d94 2023-01-10 thomas 			break;
1128 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_WANT:
1129 62ee7d94 2023-01-10 thomas 			if (client->state != GOTD_STATE_EXPECT_WANT) {
1130 62ee7d94 2023-01-10 thomas 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1131 62ee7d94 2023-01-10 thomas 				    "unexpected want-line received");
1132 62ee7d94 2023-01-10 thomas 				break;
1133 62ee7d94 2023-01-10 thomas 			}
1134 62ee7d94 2023-01-10 thomas 			log_debug("received want-line from uid %d",
1135 62ee7d94 2023-01-10 thomas 			    client->euid);
1136 62ee7d94 2023-01-10 thomas 			err = ensure_client_is_reading(client);
1137 62ee7d94 2023-01-10 thomas 			if (err)
1138 62ee7d94 2023-01-10 thomas 				break;
1139 98c7fd82 2023-01-23 thomas 			client->accept_flush_pkt = 1;
1140 62ee7d94 2023-01-10 thomas 			err = forward_want(client, &imsg);
1141 62ee7d94 2023-01-10 thomas 			break;
1142 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_REF_UPDATE:
1143 0445d8ec 2023-01-19 thomas 			if (client->state != GOTD_STATE_EXPECT_REF_UPDATE &&
1144 0445d8ec 2023-01-19 thomas 			    client->state !=
1145 0445d8ec 2023-01-19 thomas 			    GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1146 62ee7d94 2023-01-10 thomas 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1147 62ee7d94 2023-01-10 thomas 				    "unexpected ref-update-line received");
1148 62ee7d94 2023-01-10 thomas 				break;
1149 62ee7d94 2023-01-10 thomas 			}
1150 62ee7d94 2023-01-10 thomas 			log_debug("received ref-update-line from uid %d",
1151 62ee7d94 2023-01-10 thomas 			    client->euid);
1152 62ee7d94 2023-01-10 thomas 			err = ensure_client_is_writing(client);
1153 62ee7d94 2023-01-10 thomas 			if (err)
1154 62ee7d94 2023-01-10 thomas 				break;
1155 62ee7d94 2023-01-10 thomas 			err = forward_ref_update(client, &imsg);
1156 62ee7d94 2023-01-10 thomas 			if (err)
1157 62ee7d94 2023-01-10 thomas 				break;
1158 62ee7d94 2023-01-10 thomas 			client->state = GOTD_STATE_EXPECT_MORE_REF_UPDATES;
1159 98c7fd82 2023-01-23 thomas 			client->accept_flush_pkt = 1;
1160 62ee7d94 2023-01-10 thomas 			break;
1161 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_HAVE:
1162 62ee7d94 2023-01-10 thomas 			if (client->state != GOTD_STATE_EXPECT_HAVE) {
1163 62ee7d94 2023-01-10 thomas 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1164 62ee7d94 2023-01-10 thomas 				    "unexpected have-line received");
1165 62ee7d94 2023-01-10 thomas 				break;
1166 62ee7d94 2023-01-10 thomas 			}
1167 62ee7d94 2023-01-10 thomas 			log_debug("received have-line from uid %d",
1168 62ee7d94 2023-01-10 thomas 			    client->euid);
1169 62ee7d94 2023-01-10 thomas 			err = ensure_client_is_reading(client);
1170 62ee7d94 2023-01-10 thomas 			if (err)
1171 62ee7d94 2023-01-10 thomas 				break;
1172 62ee7d94 2023-01-10 thomas 			err = forward_have(client, &imsg);
1173 62ee7d94 2023-01-10 thomas 			if (err)
1174 62ee7d94 2023-01-10 thomas 				break;
1175 98c7fd82 2023-01-23 thomas 			client->accept_flush_pkt = 1;
1176 62ee7d94 2023-01-10 thomas 			break;
1177 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_FLUSH:
1178 62ee7d94 2023-01-10 thomas 			if (client->state == GOTD_STATE_EXPECT_WANT ||
1179 62ee7d94 2023-01-10 thomas 			    client->state == GOTD_STATE_EXPECT_HAVE) {
1180 62ee7d94 2023-01-10 thomas 				err = ensure_client_is_reading(client);
1181 62ee7d94 2023-01-10 thomas 				if (err)
1182 62ee7d94 2023-01-10 thomas 					break;
1183 62ee7d94 2023-01-10 thomas 			} else if (client->state ==
1184 62ee7d94 2023-01-10 thomas 			    GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1185 62ee7d94 2023-01-10 thomas 				err = ensure_client_is_writing(client);
1186 62ee7d94 2023-01-10 thomas 				if (err)
1187 62ee7d94 2023-01-10 thomas 					break;
1188 6110f5ef 2023-01-19 thomas 			} else if (client->state != GOTD_STATE_EXPECT_DONE) {
1189 98c7fd82 2023-01-23 thomas 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1190 98c7fd82 2023-01-23 thomas 				    "unexpected flush-pkt received");
1191 98c7fd82 2023-01-23 thomas 				break;
1192 98c7fd82 2023-01-23 thomas 			}
1193 98c7fd82 2023-01-23 thomas 			if (!client->accept_flush_pkt) {
1194 62ee7d94 2023-01-10 thomas 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1195 62ee7d94 2023-01-10 thomas 				    "unexpected flush-pkt received");
1196 62ee7d94 2023-01-10 thomas 				break;
1197 62ee7d94 2023-01-10 thomas 			}
1198 98c7fd82 2023-01-23 thomas 
1199 98c7fd82 2023-01-23 thomas 			/*
1200 98c7fd82 2023-01-23 thomas 			 * Accept just one flush packet at a time.
1201 98c7fd82 2023-01-23 thomas 			 * Future client state transitions will set this flag
1202 98c7fd82 2023-01-23 thomas 			 * again if another flush packet is expected.
1203 98c7fd82 2023-01-23 thomas 			 */
1204 98c7fd82 2023-01-23 thomas 			client->accept_flush_pkt = 0;
1205 98c7fd82 2023-01-23 thomas 
1206 62ee7d94 2023-01-10 thomas 			log_debug("received flush-pkt from uid %d",
1207 62ee7d94 2023-01-10 thomas 			    client->euid);
1208 62ee7d94 2023-01-10 thomas 			if (client->state == GOTD_STATE_EXPECT_WANT) {
1209 62ee7d94 2023-01-10 thomas 				client->state = GOTD_STATE_EXPECT_HAVE;
1210 62ee7d94 2023-01-10 thomas 				log_debug("uid %d: expecting have-lines",
1211 62ee7d94 2023-01-10 thomas 				    client->euid);
1212 62ee7d94 2023-01-10 thomas 			} else if (client->state == GOTD_STATE_EXPECT_HAVE) {
1213 62ee7d94 2023-01-10 thomas 				client->state = GOTD_STATE_EXPECT_DONE;
1214 98c7fd82 2023-01-23 thomas 				client->accept_flush_pkt = 1;
1215 62ee7d94 2023-01-10 thomas 				log_debug("uid %d: expecting 'done'",
1216 62ee7d94 2023-01-10 thomas 				    client->euid);
1217 62ee7d94 2023-01-10 thomas 			} else if (client->state ==
1218 62ee7d94 2023-01-10 thomas 			    GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1219 62ee7d94 2023-01-10 thomas 				client->state = GOTD_STATE_EXPECT_PACKFILE;
1220 62ee7d94 2023-01-10 thomas 				log_debug("uid %d: expecting packfile",
1221 62ee7d94 2023-01-10 thomas 				    client->euid);
1222 62ee7d94 2023-01-10 thomas 				err = recv_packfile(client);
1223 6110f5ef 2023-01-19 thomas 			} else if (client->state != GOTD_STATE_EXPECT_DONE) {
1224 62ee7d94 2023-01-10 thomas 				/* should not happen, see above */
1225 62ee7d94 2023-01-10 thomas 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1226 62ee7d94 2023-01-10 thomas 				    "unexpected client state");
1227 62ee7d94 2023-01-10 thomas 				break;
1228 62ee7d94 2023-01-10 thomas 			}
1229 62ee7d94 2023-01-10 thomas 			break;
1230 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_DONE:
1231 62ee7d94 2023-01-10 thomas 			if (client->state != GOTD_STATE_EXPECT_HAVE &&
1232 62ee7d94 2023-01-10 thomas 			    client->state != GOTD_STATE_EXPECT_DONE) {
1233 62ee7d94 2023-01-10 thomas 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1234 62ee7d94 2023-01-10 thomas 				    "unexpected flush-pkt received");
1235 62ee7d94 2023-01-10 thomas 				break;
1236 62ee7d94 2023-01-10 thomas 			}
1237 62ee7d94 2023-01-10 thomas 			log_debug("received 'done' from uid %d", client->euid);
1238 62ee7d94 2023-01-10 thomas 			err = ensure_client_is_reading(client);
1239 62ee7d94 2023-01-10 thomas 			if (err)
1240 62ee7d94 2023-01-10 thomas 				break;
1241 62ee7d94 2023-01-10 thomas 			client->state = GOTD_STATE_DONE;
1242 98c7fd82 2023-01-23 thomas 			client->accept_flush_pkt = 1;
1243 62ee7d94 2023-01-10 thomas 			err = send_packfile(client);
1244 62ee7d94 2023-01-10 thomas 			break;
1245 62ee7d94 2023-01-10 thomas 		default:
1246 62ee7d94 2023-01-10 thomas 			log_debug("unexpected imsg %d", imsg.hdr.type);
1247 62ee7d94 2023-01-10 thomas 			err = got_error(GOT_ERR_PRIVSEP_MSG);
1248 62ee7d94 2023-01-10 thomas 			break;
1249 62ee7d94 2023-01-10 thomas 		}
1250 62ee7d94 2023-01-10 thomas 
1251 62ee7d94 2023-01-10 thomas 		imsg_free(&imsg);
1252 62ee7d94 2023-01-10 thomas 	}
1253 62ee7d94 2023-01-10 thomas 
1254 62ee7d94 2023-01-10 thomas 	if (err) {
1255 62ee7d94 2023-01-10 thomas 		if (err->code != GOT_ERR_EOF ||
1256 62ee7d94 2023-01-10 thomas 		    client->state != GOTD_STATE_EXPECT_PACKFILE)
1257 62ee7d94 2023-01-10 thomas 			disconnect_on_error(client, err);
1258 62ee7d94 2023-01-10 thomas 	} else {
1259 62ee7d94 2023-01-10 thomas 		gotd_imsg_event_add(iev);
1260 62ee7d94 2023-01-10 thomas 		evtimer_add(&client->tmo, &gotd_session.request_timeout);
1261 62ee7d94 2023-01-10 thomas 	}
1262 62ee7d94 2023-01-10 thomas }
1263 62ee7d94 2023-01-10 thomas 
1264 62ee7d94 2023-01-10 thomas static const struct got_error *
1265 62ee7d94 2023-01-10 thomas list_refs_request(void)
1266 62ee7d94 2023-01-10 thomas {
1267 62ee7d94 2023-01-10 thomas 	static const struct got_error *err;
1268 62ee7d94 2023-01-10 thomas 	struct gotd_session_client *client = &gotd_session_client;
1269 62ee7d94 2023-01-10 thomas 	struct gotd_imsgev *iev = &client->repo_child_iev;
1270 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_list_refs_internal ilref;
1271 62ee7d94 2023-01-10 thomas 	int fd;
1272 62ee7d94 2023-01-10 thomas 
1273 62ee7d94 2023-01-10 thomas 	if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1274 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_MSG);
1275 62ee7d94 2023-01-10 thomas 
1276 62ee7d94 2023-01-10 thomas 	memset(&ilref, 0, sizeof(ilref));
1277 62ee7d94 2023-01-10 thomas 	ilref.client_id = client->id;
1278 62ee7d94 2023-01-10 thomas 
1279 62ee7d94 2023-01-10 thomas 	fd = dup(client->fd);
1280 62ee7d94 2023-01-10 thomas 	if (fd == -1)
1281 62ee7d94 2023-01-10 thomas 		return got_error_from_errno("dup");
1282 62ee7d94 2023-01-10 thomas 
1283 62ee7d94 2023-01-10 thomas 	if (gotd_imsg_compose_event(iev, GOTD_IMSG_LIST_REFS_INTERNAL,
1284 7fed8fa4 2023-06-22 thomas 	    gotd_session.proc_id, fd, &ilref, sizeof(ilref)) == -1) {
1285 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("imsg compose LIST_REFS_INTERNAL");
1286 62ee7d94 2023-01-10 thomas 		close(fd);
1287 62ee7d94 2023-01-10 thomas 		return err;
1288 62ee7d94 2023-01-10 thomas 	}
1289 62ee7d94 2023-01-10 thomas 
1290 62ee7d94 2023-01-10 thomas 	client->state = GOTD_STATE_EXPECT_CAPABILITIES;
1291 62ee7d94 2023-01-10 thomas 	log_debug("uid %d: expecting capabilities", client->euid);
1292 62ee7d94 2023-01-10 thomas 	return NULL;
1293 62ee7d94 2023-01-10 thomas }
1294 62ee7d94 2023-01-10 thomas 
1295 62ee7d94 2023-01-10 thomas static const struct got_error *
1296 62ee7d94 2023-01-10 thomas recv_connect(struct imsg *imsg)
1297 62ee7d94 2023-01-10 thomas {
1298 62ee7d94 2023-01-10 thomas 	struct gotd_session_client *client = &gotd_session_client;
1299 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_connect iconnect;
1300 62ee7d94 2023-01-10 thomas 	size_t datalen;
1301 62ee7d94 2023-01-10 thomas 
1302 62ee7d94 2023-01-10 thomas 	if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1303 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_MSG);
1304 62ee7d94 2023-01-10 thomas 
1305 62ee7d94 2023-01-10 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1306 62ee7d94 2023-01-10 thomas 	if (datalen != sizeof(iconnect))
1307 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
1308 62ee7d94 2023-01-10 thomas 	memcpy(&iconnect, imsg->data, sizeof(iconnect));
1309 62ee7d94 2023-01-10 thomas 
1310 62ee7d94 2023-01-10 thomas 	if (imsg->fd == -1)
1311 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
1312 62ee7d94 2023-01-10 thomas 
1313 62ee7d94 2023-01-10 thomas 	client->fd = imsg->fd;
1314 62ee7d94 2023-01-10 thomas 	client->euid = iconnect.euid;
1315 62ee7d94 2023-01-10 thomas 	client->egid = iconnect.egid;
1316 62ee7d94 2023-01-10 thomas 
1317 62ee7d94 2023-01-10 thomas 	imsg_init(&client->iev.ibuf, client->fd);
1318 8cb46987 2023-02-07 thomas 	client->iev.handler = session_dispatch_client;
1319 62ee7d94 2023-01-10 thomas 	client->iev.events = EV_READ;
1320 62ee7d94 2023-01-10 thomas 	client->iev.handler_arg = NULL;
1321 62ee7d94 2023-01-10 thomas 	event_set(&client->iev.ev, client->iev.ibuf.fd, EV_READ,
1322 8cb46987 2023-02-07 thomas 	    session_dispatch_client, &client->iev);
1323 62ee7d94 2023-01-10 thomas 	gotd_imsg_event_add(&client->iev);
1324 62ee7d94 2023-01-10 thomas 	evtimer_set(&client->tmo, gotd_request_timeout, client);
1325 62ee7d94 2023-01-10 thomas 
1326 62ee7d94 2023-01-10 thomas 	return NULL;
1327 62ee7d94 2023-01-10 thomas }
1328 62ee7d94 2023-01-10 thomas 
1329 62ee7d94 2023-01-10 thomas static const struct got_error *
1330 62ee7d94 2023-01-10 thomas recv_repo_child(struct imsg *imsg)
1331 62ee7d94 2023-01-10 thomas {
1332 62ee7d94 2023-01-10 thomas 	struct gotd_imsg_connect_repo_child ichild;
1333 62ee7d94 2023-01-10 thomas 	struct gotd_session_client *client = &gotd_session_client;
1334 62ee7d94 2023-01-10 thomas 	size_t datalen;
1335 62ee7d94 2023-01-10 thomas 
1336 62ee7d94 2023-01-10 thomas 	if (client->state != GOTD_STATE_EXPECT_LIST_REFS)
1337 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_MSG);
1338 62ee7d94 2023-01-10 thomas 
1339 62ee7d94 2023-01-10 thomas 	/* We should already have received a pipe to the listener. */
1340 62ee7d94 2023-01-10 thomas 	if (client->fd == -1)
1341 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_MSG);
1342 62ee7d94 2023-01-10 thomas 
1343 62ee7d94 2023-01-10 thomas 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1344 62ee7d94 2023-01-10 thomas 	if (datalen != sizeof(ichild))
1345 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_LEN);
1346 62ee7d94 2023-01-10 thomas 
1347 62ee7d94 2023-01-10 thomas 	memcpy(&ichild, imsg->data, sizeof(ichild));
1348 62ee7d94 2023-01-10 thomas 
1349 62ee7d94 2023-01-10 thomas 	client->id = ichild.client_id;
1350 62ee7d94 2023-01-10 thomas 	if (ichild.proc_id == PROC_REPO_WRITE)
1351 62ee7d94 2023-01-10 thomas 		client->is_writing = 1;
1352 62ee7d94 2023-01-10 thomas 	else if (ichild.proc_id == PROC_REPO_READ)
1353 62ee7d94 2023-01-10 thomas 		client->is_writing = 0;
1354 62ee7d94 2023-01-10 thomas 	else
1355 62ee7d94 2023-01-10 thomas 		return got_error_msg(GOT_ERR_PRIVSEP_MSG,
1356 62ee7d94 2023-01-10 thomas 		    "bad child process type");
1357 d4628c48 2023-02-03 thomas 
1358 62ee7d94 2023-01-10 thomas 	if (imsg->fd == -1)
1359 62ee7d94 2023-01-10 thomas 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
1360 62ee7d94 2023-01-10 thomas 
1361 62ee7d94 2023-01-10 thomas 	imsg_init(&client->repo_child_iev.ibuf, imsg->fd);
1362 62ee7d94 2023-01-10 thomas 	client->repo_child_iev.handler = session_dispatch_repo_child;
1363 62ee7d94 2023-01-10 thomas 	client->repo_child_iev.events = EV_READ;
1364 62ee7d94 2023-01-10 thomas 	client->repo_child_iev.handler_arg = NULL;
1365 62ee7d94 2023-01-10 thomas 	event_set(&client->repo_child_iev.ev, client->repo_child_iev.ibuf.fd,
1366 62ee7d94 2023-01-10 thomas 	    EV_READ, session_dispatch_repo_child, &client->repo_child_iev);
1367 62ee7d94 2023-01-10 thomas 	gotd_imsg_event_add(&client->repo_child_iev);
1368 62ee7d94 2023-01-10 thomas 
1369 62ee7d94 2023-01-10 thomas 	/* The "recvfd" pledge promise is no longer needed. */
1370 62ee7d94 2023-01-10 thomas 	if (pledge("stdio rpath wpath cpath sendfd fattr flock", NULL) == -1)
1371 62ee7d94 2023-01-10 thomas 		fatal("pledge");
1372 62ee7d94 2023-01-10 thomas 
1373 62ee7d94 2023-01-10 thomas 	return NULL;
1374 62ee7d94 2023-01-10 thomas }
1375 62ee7d94 2023-01-10 thomas 
1376 62ee7d94 2023-01-10 thomas static void
1377 62ee7d94 2023-01-10 thomas session_dispatch(int fd, short event, void *arg)
1378 62ee7d94 2023-01-10 thomas {
1379 62ee7d94 2023-01-10 thomas 	struct gotd_imsgev *iev = arg;
1380 62ee7d94 2023-01-10 thomas 	struct imsgbuf *ibuf = &iev->ibuf;
1381 62ee7d94 2023-01-10 thomas 	struct gotd_session_client *client = &gotd_session_client;
1382 62ee7d94 2023-01-10 thomas 	ssize_t n;
1383 62ee7d94 2023-01-10 thomas 	int shut = 0;
1384 62ee7d94 2023-01-10 thomas 	struct imsg imsg;
1385 62ee7d94 2023-01-10 thomas 
1386 62ee7d94 2023-01-10 thomas 	if (event & EV_READ) {
1387 62ee7d94 2023-01-10 thomas 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1388 62ee7d94 2023-01-10 thomas 			fatal("imsg_read error");
1389 62ee7d94 2023-01-10 thomas 		if (n == 0) {
1390 62ee7d94 2023-01-10 thomas 			/* Connection closed. */
1391 62ee7d94 2023-01-10 thomas 			shut = 1;
1392 62ee7d94 2023-01-10 thomas 			goto done;
1393 62ee7d94 2023-01-10 thomas 		}
1394 62ee7d94 2023-01-10 thomas 	}
1395 62ee7d94 2023-01-10 thomas 
1396 62ee7d94 2023-01-10 thomas 	if (event & EV_WRITE) {
1397 62ee7d94 2023-01-10 thomas 		n = msgbuf_write(&ibuf->w);
1398 62ee7d94 2023-01-10 thomas 		if (n == -1 && errno != EAGAIN)
1399 62ee7d94 2023-01-10 thomas 			fatal("msgbuf_write");
1400 62ee7d94 2023-01-10 thomas 		if (n == 0) {
1401 62ee7d94 2023-01-10 thomas 			/* Connection closed. */
1402 62ee7d94 2023-01-10 thomas 			shut = 1;
1403 62ee7d94 2023-01-10 thomas 			goto done;
1404 62ee7d94 2023-01-10 thomas 		}
1405 62ee7d94 2023-01-10 thomas 	}
1406 62ee7d94 2023-01-10 thomas 
1407 62ee7d94 2023-01-10 thomas 	for (;;) {
1408 62ee7d94 2023-01-10 thomas 		const struct got_error *err = NULL;
1409 62ee7d94 2023-01-10 thomas 		uint32_t client_id = 0;
1410 62ee7d94 2023-01-10 thomas 		int do_disconnect = 0, do_list_refs = 0;
1411 62ee7d94 2023-01-10 thomas 
1412 62ee7d94 2023-01-10 thomas 		if ((n = imsg_get(ibuf, &imsg)) == -1)
1413 62ee7d94 2023-01-10 thomas 			fatal("%s: imsg_get error", __func__);
1414 62ee7d94 2023-01-10 thomas 		if (n == 0)	/* No more messages. */
1415 62ee7d94 2023-01-10 thomas 			break;
1416 62ee7d94 2023-01-10 thomas 
1417 62ee7d94 2023-01-10 thomas 		switch (imsg.hdr.type) {
1418 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_ERROR:
1419 62ee7d94 2023-01-10 thomas 			do_disconnect = 1;
1420 62ee7d94 2023-01-10 thomas 			err = gotd_imsg_recv_error(&client_id, &imsg);
1421 62ee7d94 2023-01-10 thomas 			break;
1422 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_CONNECT:
1423 62ee7d94 2023-01-10 thomas 			err = recv_connect(&imsg);
1424 62ee7d94 2023-01-10 thomas 			break;
1425 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_DISCONNECT:
1426 62ee7d94 2023-01-10 thomas 			do_disconnect = 1;
1427 62ee7d94 2023-01-10 thomas 			break;
1428 62ee7d94 2023-01-10 thomas 		case GOTD_IMSG_CONNECT_REPO_CHILD:
1429 62ee7d94 2023-01-10 thomas 			err = recv_repo_child(&imsg);
1430 62ee7d94 2023-01-10 thomas 			if (err)
1431 62ee7d94 2023-01-10 thomas 				break;
1432 62ee7d94 2023-01-10 thomas 			do_list_refs = 1;
1433 62ee7d94 2023-01-10 thomas 			break;
1434 62ee7d94 2023-01-10 thomas 		default:
1435 62ee7d94 2023-01-10 thomas 			log_debug("unexpected imsg %d", imsg.hdr.type);
1436 62ee7d94 2023-01-10 thomas 			break;
1437 62ee7d94 2023-01-10 thomas 		}
1438 62ee7d94 2023-01-10 thomas 		imsg_free(&imsg);
1439 62ee7d94 2023-01-10 thomas 
1440 62ee7d94 2023-01-10 thomas 		if (do_disconnect) {
1441 62ee7d94 2023-01-10 thomas 			if (err)
1442 62ee7d94 2023-01-10 thomas 				disconnect_on_error(client, err);
1443 62ee7d94 2023-01-10 thomas 			else
1444 62ee7d94 2023-01-10 thomas 				disconnect(client);
1445 62ee7d94 2023-01-10 thomas 		} else if (do_list_refs)
1446 62ee7d94 2023-01-10 thomas 			err = list_refs_request();
1447 62ee7d94 2023-01-10 thomas 
1448 62ee7d94 2023-01-10 thomas 		if (err)
1449 62ee7d94 2023-01-10 thomas 			log_warnx("uid %d: %s", client->euid, err->msg);
1450 62ee7d94 2023-01-10 thomas 	}
1451 62ee7d94 2023-01-10 thomas done:
1452 62ee7d94 2023-01-10 thomas 	if (!shut) {
1453 62ee7d94 2023-01-10 thomas 		gotd_imsg_event_add(iev);
1454 62ee7d94 2023-01-10 thomas 	} else {
1455 62ee7d94 2023-01-10 thomas 		/* This pipe is dead. Remove its event handler */
1456 62ee7d94 2023-01-10 thomas 		event_del(&iev->ev);
1457 62ee7d94 2023-01-10 thomas 		event_loopexit(NULL);
1458 d4628c48 2023-02-03 thomas 	}
1459 62ee7d94 2023-01-10 thomas }
1460 62ee7d94 2023-01-10 thomas 
1461 62ee7d94 2023-01-10 thomas void
1462 62ee7d94 2023-01-10 thomas session_main(const char *title, const char *repo_path,
1463 7fed8fa4 2023-06-22 thomas     int *pack_fds, int *temp_fds, struct timeval *request_timeout,
1464 7fed8fa4 2023-06-22 thomas     enum gotd_procid proc_id)
1465 62ee7d94 2023-01-10 thomas {
1466 62ee7d94 2023-01-10 thomas 	const struct got_error *err = NULL;
1467 62ee7d94 2023-01-10 thomas 	struct event evsigint, evsigterm, evsighup, evsigusr1;
1468 62ee7d94 2023-01-10 thomas 
1469 62ee7d94 2023-01-10 thomas 	gotd_session.title = title;
1470 62ee7d94 2023-01-10 thomas 	gotd_session.pid = getpid();
1471 62ee7d94 2023-01-10 thomas 	gotd_session.pack_fds = pack_fds;
1472 62ee7d94 2023-01-10 thomas 	gotd_session.temp_fds = temp_fds;
1473 62ee7d94 2023-01-10 thomas 	memcpy(&gotd_session.request_timeout, request_timeout,
1474 62ee7d94 2023-01-10 thomas 	    sizeof(gotd_session.request_timeout));
1475 7fed8fa4 2023-06-22 thomas 	gotd_session.proc_id = proc_id;
1476 62ee7d94 2023-01-10 thomas 
1477 62ee7d94 2023-01-10 thomas 	err = got_repo_open(&gotd_session.repo, repo_path, NULL, pack_fds);
1478 62ee7d94 2023-01-10 thomas 	if (err)
1479 62ee7d94 2023-01-10 thomas 		goto done;
1480 62ee7d94 2023-01-10 thomas 	if (!got_repo_is_bare(gotd_session.repo)) {
1481 62ee7d94 2023-01-10 thomas 		err = got_error_msg(GOT_ERR_NOT_GIT_REPO,
1482 62ee7d94 2023-01-10 thomas 		    "bare git repository required");
1483 62ee7d94 2023-01-10 thomas 		goto done;
1484 62ee7d94 2023-01-10 thomas 	}
1485 62ee7d94 2023-01-10 thomas 
1486 62ee7d94 2023-01-10 thomas 	got_repo_temp_fds_set(gotd_session.repo, temp_fds);
1487 62ee7d94 2023-01-10 thomas 
1488 62ee7d94 2023-01-10 thomas 	signal_set(&evsigint, SIGINT, gotd_session_sighdlr, NULL);
1489 62ee7d94 2023-01-10 thomas 	signal_set(&evsigterm, SIGTERM, gotd_session_sighdlr, NULL);
1490 62ee7d94 2023-01-10 thomas 	signal_set(&evsighup, SIGHUP, gotd_session_sighdlr, NULL);
1491 62ee7d94 2023-01-10 thomas 	signal_set(&evsigusr1, SIGUSR1, gotd_session_sighdlr, NULL);
1492 62ee7d94 2023-01-10 thomas 	signal(SIGPIPE, SIG_IGN);
1493 62ee7d94 2023-01-10 thomas 
1494 62ee7d94 2023-01-10 thomas 	signal_add(&evsigint, NULL);
1495 62ee7d94 2023-01-10 thomas 	signal_add(&evsigterm, NULL);
1496 62ee7d94 2023-01-10 thomas 	signal_add(&evsighup, NULL);
1497 62ee7d94 2023-01-10 thomas 	signal_add(&evsigusr1, NULL);
1498 62ee7d94 2023-01-10 thomas 
1499 62ee7d94 2023-01-10 thomas 	gotd_session_client.state = GOTD_STATE_EXPECT_LIST_REFS;
1500 62ee7d94 2023-01-10 thomas 	gotd_session_client.fd = -1;
1501 62ee7d94 2023-01-10 thomas 	gotd_session_client.nref_updates = -1;
1502 a6f25078 2023-01-10 thomas 	gotd_session_client.delta_cache_fd = -1;
1503 98c7fd82 2023-01-23 thomas 	gotd_session_client.accept_flush_pkt = 1;
1504 62ee7d94 2023-01-10 thomas 
1505 62ee7d94 2023-01-10 thomas 	imsg_init(&gotd_session.parent_iev.ibuf, GOTD_FILENO_MSG_PIPE);
1506 62ee7d94 2023-01-10 thomas 	gotd_session.parent_iev.handler = session_dispatch;
1507 62ee7d94 2023-01-10 thomas 	gotd_session.parent_iev.events = EV_READ;
1508 62ee7d94 2023-01-10 thomas 	gotd_session.parent_iev.handler_arg = NULL;
1509 62ee7d94 2023-01-10 thomas 	event_set(&gotd_session.parent_iev.ev, gotd_session.parent_iev.ibuf.fd,
1510 62ee7d94 2023-01-10 thomas 	    EV_READ, session_dispatch, &gotd_session.parent_iev);
1511 62ee7d94 2023-01-10 thomas 	if (gotd_imsg_compose_event(&gotd_session.parent_iev,
1512 7fed8fa4 2023-06-22 thomas 	    GOTD_IMSG_CLIENT_SESSION_READY, gotd_session.proc_id,
1513 7fed8fa4 2023-06-22 thomas 	    -1, NULL, 0) == -1) {
1514 62ee7d94 2023-01-10 thomas 		err = got_error_from_errno("imsg compose CLIENT_SESSION_READY");
1515 62ee7d94 2023-01-10 thomas 		goto done;
1516 62ee7d94 2023-01-10 thomas 	}
1517 62ee7d94 2023-01-10 thomas 
1518 62ee7d94 2023-01-10 thomas 	event_dispatch();
1519 62ee7d94 2023-01-10 thomas done:
1520 62ee7d94 2023-01-10 thomas 	if (err)
1521 62ee7d94 2023-01-10 thomas 		log_warnx("%s: %s", title, err->msg);
1522 62ee7d94 2023-01-10 thomas 	gotd_session_shutdown();
1523 62ee7d94 2023-01-10 thomas }
1524 62ee7d94 2023-01-10 thomas 
1525 62ee7d94 2023-01-10 thomas void
1526 62ee7d94 2023-01-10 thomas gotd_session_shutdown(void)
1527 62ee7d94 2023-01-10 thomas {
1528 5330ab76 2023-02-17 thomas 	log_debug("shutting down");
1529 62ee7d94 2023-01-10 thomas 	if (gotd_session.repo)
1530 62ee7d94 2023-01-10 thomas 		got_repo_close(gotd_session.repo);
1531 62ee7d94 2023-01-10 thomas 	got_repo_pack_fds_close(gotd_session.pack_fds);
1532 62ee7d94 2023-01-10 thomas 	got_repo_temp_fds_close(gotd_session.temp_fds);
1533 62ee7d94 2023-01-10 thomas 	exit(0);
1534 62ee7d94 2023-01-10 thomas }