1 e70fd952 2024-03-22 stsp /*
   2 e70fd952 2024-03-22 stsp  * Copyright (c) 2022, 2023 Stefan Sperling <stsp@openbsd.org>
   3 e70fd952 2024-03-22 stsp  *
   4 e70fd952 2024-03-22 stsp  * Permission to use, copy, modify, and distribute this software for any
   5 e70fd952 2024-03-22 stsp  * purpose with or without fee is hereby granted, provided that the above
   6 e70fd952 2024-03-22 stsp  * copyright notice and this permission notice appear in all copies.
   7 e70fd952 2024-03-22 stsp  *
   8 e70fd952 2024-03-22 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9 e70fd952 2024-03-22 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10 e70fd952 2024-03-22 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11 e70fd952 2024-03-22 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12 e70fd952 2024-03-22 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13 e70fd952 2024-03-22 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14 e70fd952 2024-03-22 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15 e70fd952 2024-03-22 stsp  */
  16 e70fd952 2024-03-22 stsp 
  17 e70fd952 2024-03-22 stsp #include <sys/types.h>
  18 e70fd952 2024-03-22 stsp #include <sys/queue.h>
  19 e70fd952 2024-03-22 stsp #include <sys/tree.h>
  20 e70fd952 2024-03-22 stsp #include <sys/socket.h>
  21 e70fd952 2024-03-22 stsp #include <sys/stat.h>
  22 e70fd952 2024-03-22 stsp #include <sys/uio.h>
  23 e70fd952 2024-03-22 stsp 
  24 e70fd952 2024-03-22 stsp #include <errno.h>
  25 e70fd952 2024-03-22 stsp #include <event.h>
  26 e70fd952 2024-03-22 stsp #include <limits.h>
  27 e70fd952 2024-03-22 stsp #include <sha1.h>
  28 e70fd952 2024-03-22 stsp #include <sha2.h>
  29 e70fd952 2024-03-22 stsp #include <signal.h>
  30 e70fd952 2024-03-22 stsp #include <stdint.h>
  31 e70fd952 2024-03-22 stsp #include <stdio.h>
  32 e70fd952 2024-03-22 stsp #include <stdlib.h>
  33 e70fd952 2024-03-22 stsp #include <string.h>
  34 e70fd952 2024-03-22 stsp #include <imsg.h>
  35 e70fd952 2024-03-22 stsp #include <unistd.h>
  36 e70fd952 2024-03-22 stsp 
  37 e70fd952 2024-03-22 stsp #include "got_error.h"
  38 e70fd952 2024-03-22 stsp #include "got_repository.h"
  39 e70fd952 2024-03-22 stsp #include "got_object.h"
  40 e70fd952 2024-03-22 stsp #include "got_path.h"
  41 e70fd952 2024-03-22 stsp #include "got_reference.h"
  42 e70fd952 2024-03-22 stsp #include "got_opentemp.h"
  43 e70fd952 2024-03-22 stsp 
  44 e70fd952 2024-03-22 stsp #include "got_lib_hash.h"
  45 e70fd952 2024-03-22 stsp #include "got_lib_delta.h"
  46 e70fd952 2024-03-22 stsp #include "got_lib_object.h"
  47 e70fd952 2024-03-22 stsp #include "got_lib_object_cache.h"
  48 e70fd952 2024-03-22 stsp #include "got_lib_pack.h"
  49 e70fd952 2024-03-22 stsp #include "got_lib_repository.h"
  50 e70fd952 2024-03-22 stsp #include "got_lib_gitproto.h"
  51 e70fd952 2024-03-22 stsp 
  52 e70fd952 2024-03-22 stsp #include "gotd.h"
  53 e70fd952 2024-03-22 stsp #include "log.h"
  54 e70fd952 2024-03-22 stsp #include "session_write.h"
  55 e70fd952 2024-03-22 stsp 
  56 e70fd952 2024-03-22 stsp struct gotd_session_notif {
  57 e70fd952 2024-03-22 stsp 	STAILQ_ENTRY(gotd_session_notif) entry;
  58 e70fd952 2024-03-22 stsp 	int fd;
  59 e70fd952 2024-03-22 stsp 	enum gotd_notification_action action;
  60 e70fd952 2024-03-22 stsp 	char *refname;
  61 e70fd952 2024-03-22 stsp 	struct got_object_id old_id;
  62 e70fd952 2024-03-22 stsp 	struct got_object_id new_id;
  63 e70fd952 2024-03-22 stsp };
  64 e70fd952 2024-03-22 stsp STAILQ_HEAD(gotd_session_notifications, gotd_session_notif) notifications;
  65 e70fd952 2024-03-22 stsp 
  66 e70fd952 2024-03-22 stsp enum gotd_session_write_state {
  67 e70fd952 2024-03-22 stsp 	GOTD_STATE_EXPECT_LIST_REFS,
  68 e70fd952 2024-03-22 stsp 	GOTD_STATE_EXPECT_CAPABILITIES,
  69 e70fd952 2024-03-22 stsp 	GOTD_STATE_EXPECT_REF_UPDATE,
  70 e70fd952 2024-03-22 stsp 	GOTD_STATE_EXPECT_MORE_REF_UPDATES,
  71 e70fd952 2024-03-22 stsp 	GOTD_STATE_EXPECT_PACKFILE,
  72 e70fd952 2024-03-22 stsp 	GOTD_STATE_NOTIFY,
  73 e70fd952 2024-03-22 stsp };
  74 e70fd952 2024-03-22 stsp 
  75 e70fd952 2024-03-22 stsp static struct gotd_session_write {
  76 e70fd952 2024-03-22 stsp 	pid_t pid;
  77 e70fd952 2024-03-22 stsp 	const char *title;
  78 e70fd952 2024-03-22 stsp 	struct got_repository *repo;
  79 e70fd952 2024-03-22 stsp 	struct gotd_repo *repo_cfg;
  80 e70fd952 2024-03-22 stsp 	int *pack_fds;
  81 e70fd952 2024-03-22 stsp 	int *temp_fds;
  82 e70fd952 2024-03-22 stsp 	struct gotd_imsgev parent_iev;
  83 e70fd952 2024-03-22 stsp 	struct gotd_imsgev notifier_iev;
  84 e70fd952 2024-03-22 stsp 	struct timeval request_timeout;
  85 e70fd952 2024-03-22 stsp 	enum gotd_session_write_state state;
  86 e70fd952 2024-03-22 stsp 	struct gotd_imsgev repo_child_iev;
  87 e70fd952 2024-03-22 stsp } gotd_session;
  88 e70fd952 2024-03-22 stsp 
  89 e70fd952 2024-03-22 stsp static struct gotd_session_client {
  90 e70fd952 2024-03-22 stsp 	struct gotd_client_capability	*capabilities;
  91 e70fd952 2024-03-22 stsp 	size_t				 ncapa_alloc;
  92 e70fd952 2024-03-22 stsp 	size_t				 ncapabilities;
  93 e70fd952 2024-03-22 stsp 	uint32_t			 id;
  94 e70fd952 2024-03-22 stsp 	int				 fd;
  95 e70fd952 2024-03-22 stsp 	int				 delta_cache_fd;
  96 e70fd952 2024-03-22 stsp 	struct gotd_imsgev		 iev;
  97 e70fd952 2024-03-22 stsp 	struct event			 tmo;
  98 e70fd952 2024-03-22 stsp 	uid_t				 euid;
  99 e70fd952 2024-03-22 stsp 	gid_t				 egid;
 100 e70fd952 2024-03-22 stsp 	char				*username;
 101 e70fd952 2024-03-22 stsp 	char				*packfile_path;
 102 e70fd952 2024-03-22 stsp 	char				*packidx_path;
 103 e70fd952 2024-03-22 stsp 	int				 nref_updates;
 104 e70fd952 2024-03-22 stsp 	int				 accept_flush_pkt;
 105 e70fd952 2024-03-22 stsp 	int				 flush_disconnect;
 106 e70fd952 2024-03-22 stsp } gotd_session_client;
 107 e70fd952 2024-03-22 stsp 
 108 e70fd952 2024-03-22 stsp static void session_write_shutdown(void);
 109 e70fd952 2024-03-22 stsp 
 110 e70fd952 2024-03-22 stsp static void
 111 e70fd952 2024-03-22 stsp disconnect(struct gotd_session_client *client)
 112 e70fd952 2024-03-22 stsp {
 113 e70fd952 2024-03-22 stsp 	log_debug("uid %d: disconnecting", client->euid);
 114 e70fd952 2024-03-22 stsp 
 115 e70fd952 2024-03-22 stsp 	if (gotd_imsg_compose_event(&gotd_session.parent_iev,
 116 e70fd952 2024-03-22 stsp 	    GOTD_IMSG_DISCONNECT, PROC_SESSION_WRITE, -1, NULL, 0) == -1)
 117 e70fd952 2024-03-22 stsp 		log_warn("imsg compose DISCONNECT");
 118 e70fd952 2024-03-22 stsp 
 119 e70fd952 2024-03-22 stsp 	imsg_clear(&gotd_session.repo_child_iev.ibuf);
 120 e70fd952 2024-03-22 stsp 	event_del(&gotd_session.repo_child_iev.ev);
 121 e70fd952 2024-03-22 stsp 	evtimer_del(&client->tmo);
 122 e70fd952 2024-03-22 stsp 	close(client->fd);
 123 e70fd952 2024-03-22 stsp 	if (client->delta_cache_fd != -1)
 124 e70fd952 2024-03-22 stsp 		close(client->delta_cache_fd);
 125 e70fd952 2024-03-22 stsp 	if (client->packfile_path) {
 126 e70fd952 2024-03-22 stsp 		if (unlink(client->packfile_path) == -1 && errno != ENOENT)
 127 e70fd952 2024-03-22 stsp 			log_warn("unlink %s: ", client->packfile_path);
 128 e70fd952 2024-03-22 stsp 		free(client->packfile_path);
 129 e70fd952 2024-03-22 stsp 	}
 130 e70fd952 2024-03-22 stsp 	if (client->packidx_path) {
 131 e70fd952 2024-03-22 stsp 		if (unlink(client->packidx_path) == -1 && errno != ENOENT)
 132 e70fd952 2024-03-22 stsp 			log_warn("unlink %s: ", client->packidx_path);
 133 e70fd952 2024-03-22 stsp 		free(client->packidx_path);
 134 e70fd952 2024-03-22 stsp 	}
 135 e70fd952 2024-03-22 stsp 	free(client->capabilities);
 136 e70fd952 2024-03-22 stsp 
 137 e70fd952 2024-03-22 stsp 	session_write_shutdown();
 138 e70fd952 2024-03-22 stsp }
 139 e70fd952 2024-03-22 stsp 
 140 e70fd952 2024-03-22 stsp static void
 141 e70fd952 2024-03-22 stsp disconnect_on_error(struct gotd_session_client *client,
 142 e70fd952 2024-03-22 stsp     const struct got_error *err)
 143 e70fd952 2024-03-22 stsp {
 144 e70fd952 2024-03-22 stsp 	struct imsgbuf ibuf;
 145 e70fd952 2024-03-22 stsp 
 146 e70fd952 2024-03-22 stsp 	if (err->code != GOT_ERR_EOF) {
 147 e70fd952 2024-03-22 stsp 		log_warnx("uid %d: %s", client->euid, err->msg);
 148 e70fd952 2024-03-22 stsp 		imsg_init(&ibuf, client->fd);
 149 e70fd952 2024-03-22 stsp 		gotd_imsg_send_error(&ibuf, 0, PROC_SESSION_WRITE, err);
 150 e70fd952 2024-03-22 stsp 		imsg_clear(&ibuf);
 151 e70fd952 2024-03-22 stsp 	}
 152 e70fd952 2024-03-22 stsp 
 153 e70fd952 2024-03-22 stsp 	disconnect(client);
 154 e70fd952 2024-03-22 stsp }
 155 e70fd952 2024-03-22 stsp 
 156 e70fd952 2024-03-22 stsp static void
 157 e70fd952 2024-03-22 stsp gotd_request_timeout(int fd, short events, void *arg)
 158 e70fd952 2024-03-22 stsp {
 159 e70fd952 2024-03-22 stsp 	struct gotd_session_client *client = arg;
 160 e70fd952 2024-03-22 stsp 
 161 7268d461 2024-05-01 stsp 	log_warnx("disconnecting uid %d due to timeout", client->euid);
 162 e70fd952 2024-03-22 stsp 	disconnect(client);
 163 e70fd952 2024-03-22 stsp }
 164 e70fd952 2024-03-22 stsp 
 165 e70fd952 2024-03-22 stsp static void
 166 e70fd952 2024-03-22 stsp session_write_sighdlr(int sig, short event, void *arg)
 167 e70fd952 2024-03-22 stsp {
 168 e70fd952 2024-03-22 stsp 	/*
 169 e70fd952 2024-03-22 stsp 	 * Normal signal handler rules don't apply because libevent
 170 e70fd952 2024-03-22 stsp 	 * decouples for us.
 171 e70fd952 2024-03-22 stsp 	 */
 172 e70fd952 2024-03-22 stsp 
 173 e70fd952 2024-03-22 stsp 	switch (sig) {
 174 e70fd952 2024-03-22 stsp 	case SIGHUP:
 175 e70fd952 2024-03-22 stsp 		log_info("%s: ignoring SIGHUP", __func__);
 176 e70fd952 2024-03-22 stsp 		break;
 177 e70fd952 2024-03-22 stsp 	case SIGUSR1:
 178 e70fd952 2024-03-22 stsp 		log_info("%s: ignoring SIGUSR1", __func__);
 179 e70fd952 2024-03-22 stsp 		break;
 180 e70fd952 2024-03-22 stsp 	case SIGTERM:
 181 e70fd952 2024-03-22 stsp 	case SIGINT:
 182 e70fd952 2024-03-22 stsp 		session_write_shutdown();
 183 e70fd952 2024-03-22 stsp 		/* NOTREACHED */
 184 e70fd952 2024-03-22 stsp 		break;
 185 e70fd952 2024-03-22 stsp 	default:
 186 e70fd952 2024-03-22 stsp 		fatalx("unexpected signal");
 187 e70fd952 2024-03-22 stsp 	}
 188 e70fd952 2024-03-22 stsp }
 189 e70fd952 2024-03-22 stsp 
 190 e70fd952 2024-03-22 stsp static const struct got_error *
 191 e70fd952 2024-03-22 stsp recv_packfile_install(struct imsg *imsg)
 192 e70fd952 2024-03-22 stsp {
 193 e70fd952 2024-03-22 stsp 	struct gotd_imsg_packfile_install inst;
 194 e70fd952 2024-03-22 stsp 	size_t datalen;
 195 e70fd952 2024-03-22 stsp 
 196 e70fd952 2024-03-22 stsp 	log_debug("packfile-install received");
 197 e70fd952 2024-03-22 stsp 
 198 e70fd952 2024-03-22 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 199 e70fd952 2024-03-22 stsp 	if (datalen != sizeof(inst))
 200 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 201 e70fd952 2024-03-22 stsp 	memcpy(&inst, imsg->data, sizeof(inst));
 202 e70fd952 2024-03-22 stsp 
 203 e70fd952 2024-03-22 stsp 	return NULL;
 204 e70fd952 2024-03-22 stsp }
 205 e70fd952 2024-03-22 stsp 
 206 e70fd952 2024-03-22 stsp static const struct got_error *
 207 e70fd952 2024-03-22 stsp recv_ref_updates_start(struct imsg *imsg)
 208 e70fd952 2024-03-22 stsp {
 209 e70fd952 2024-03-22 stsp 	struct gotd_imsg_ref_updates_start istart;
 210 e70fd952 2024-03-22 stsp 	size_t datalen;
 211 e70fd952 2024-03-22 stsp 
 212 e70fd952 2024-03-22 stsp 	log_debug("ref-updates-start received");
 213 e70fd952 2024-03-22 stsp 
 214 e70fd952 2024-03-22 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 215 e70fd952 2024-03-22 stsp 	if (datalen != sizeof(istart))
 216 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 217 e70fd952 2024-03-22 stsp 	memcpy(&istart, imsg->data, sizeof(istart));
 218 e70fd952 2024-03-22 stsp 
 219 e70fd952 2024-03-22 stsp 	return NULL;
 220 e70fd952 2024-03-22 stsp }
 221 e70fd952 2024-03-22 stsp 
 222 e70fd952 2024-03-22 stsp static const struct got_error *
 223 e70fd952 2024-03-22 stsp recv_ref_update(struct imsg *imsg)
 224 e70fd952 2024-03-22 stsp {
 225 e70fd952 2024-03-22 stsp 	struct gotd_imsg_ref_update iref;
 226 e70fd952 2024-03-22 stsp 	size_t datalen;
 227 e70fd952 2024-03-22 stsp 
 228 e70fd952 2024-03-22 stsp 	log_debug("ref-update received");
 229 e70fd952 2024-03-22 stsp 
 230 e70fd952 2024-03-22 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 231 e70fd952 2024-03-22 stsp 	if (datalen < sizeof(iref))
 232 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 233 e70fd952 2024-03-22 stsp 	memcpy(&iref, imsg->data, sizeof(iref));
 234 e70fd952 2024-03-22 stsp 
 235 e70fd952 2024-03-22 stsp 	return NULL;
 236 e70fd952 2024-03-22 stsp }
 237 e70fd952 2024-03-22 stsp 
 238 e70fd952 2024-03-22 stsp static const struct got_error *
 239 e70fd952 2024-03-22 stsp send_ref_update_ok(struct gotd_session_client *client,
 240 e70fd952 2024-03-22 stsp     struct gotd_imsg_ref_update *iref, const char *refname)
 241 e70fd952 2024-03-22 stsp {
 242 e70fd952 2024-03-22 stsp 	struct gotd_imsg_ref_update_ok iok;
 243 e70fd952 2024-03-22 stsp 	struct gotd_imsgev *iev = &client->iev;
 244 e70fd952 2024-03-22 stsp 	struct ibuf *wbuf;
 245 e70fd952 2024-03-22 stsp 	size_t len;
 246 e70fd952 2024-03-22 stsp 
 247 e70fd952 2024-03-22 stsp 	memset(&iok, 0, sizeof(iok));
 248 e70fd952 2024-03-22 stsp 	memcpy(iok.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
 249 e70fd952 2024-03-22 stsp 	memcpy(iok.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
 250 e70fd952 2024-03-22 stsp 	iok.name_len = strlen(refname);
 251 e70fd952 2024-03-22 stsp 
 252 e70fd952 2024-03-22 stsp 	len = sizeof(iok) + iok.name_len;
 253 e70fd952 2024-03-22 stsp 	wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE_OK,
 254 e70fd952 2024-03-22 stsp 	    PROC_SESSION_WRITE, gotd_session.pid, len);
 255 e70fd952 2024-03-22 stsp 	if (wbuf == NULL)
 256 e70fd952 2024-03-22 stsp 		return got_error_from_errno("imsg_create REF_UPDATE_OK");
 257 e70fd952 2024-03-22 stsp 
 258 e70fd952 2024-03-22 stsp 	if (imsg_add(wbuf, &iok, sizeof(iok)) == -1)
 259 e70fd952 2024-03-22 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_OK");
 260 e70fd952 2024-03-22 stsp 	if (imsg_add(wbuf, refname, iok.name_len) == -1)
 261 e70fd952 2024-03-22 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_OK");
 262 e70fd952 2024-03-22 stsp 
 263 e70fd952 2024-03-22 stsp 	imsg_close(&iev->ibuf, wbuf);
 264 e70fd952 2024-03-22 stsp 	gotd_imsg_event_add(iev);
 265 e70fd952 2024-03-22 stsp 	return NULL;
 266 e70fd952 2024-03-22 stsp }
 267 e70fd952 2024-03-22 stsp 
 268 e70fd952 2024-03-22 stsp static void
 269 e70fd952 2024-03-22 stsp send_refs_updated(struct gotd_session_client *client)
 270 e70fd952 2024-03-22 stsp {
 271 e70fd952 2024-03-22 stsp 	if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_REFS_UPDATED,
 272 e70fd952 2024-03-22 stsp 	    PROC_SESSION_WRITE, -1, NULL, 0) == -1)
 273 e70fd952 2024-03-22 stsp 		log_warn("imsg compose REFS_UPDATED");
 274 e70fd952 2024-03-22 stsp }
 275 e70fd952 2024-03-22 stsp 
 276 e70fd952 2024-03-22 stsp static const struct got_error *
 277 e70fd952 2024-03-22 stsp send_ref_update_ng(struct gotd_session_client *client,
 278 e70fd952 2024-03-22 stsp     struct gotd_imsg_ref_update *iref, const char *refname,
 279 e70fd952 2024-03-22 stsp     const char *reason)
 280 e70fd952 2024-03-22 stsp {
 281 e70fd952 2024-03-22 stsp 	const struct got_error *ng_err;
 282 e70fd952 2024-03-22 stsp 	struct gotd_imsg_ref_update_ng ing;
 283 e70fd952 2024-03-22 stsp 	struct gotd_imsgev *iev = &client->iev;
 284 e70fd952 2024-03-22 stsp 	struct ibuf *wbuf;
 285 e70fd952 2024-03-22 stsp 	size_t len;
 286 e70fd952 2024-03-22 stsp 
 287 e70fd952 2024-03-22 stsp 	memset(&ing, 0, sizeof(ing));
 288 e70fd952 2024-03-22 stsp 	memcpy(ing.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
 289 e70fd952 2024-03-22 stsp 	memcpy(ing.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
 290 e70fd952 2024-03-22 stsp 	ing.name_len = strlen(refname);
 291 e70fd952 2024-03-22 stsp 
 292 e70fd952 2024-03-22 stsp 	ng_err = got_error_fmt(GOT_ERR_REF_BUSY, "%s", reason);
 293 e70fd952 2024-03-22 stsp 	ing.reason_len = strlen(ng_err->msg);
 294 e70fd952 2024-03-22 stsp 
 295 e70fd952 2024-03-22 stsp 	len = sizeof(ing) + ing.name_len + ing.reason_len;
 296 e70fd952 2024-03-22 stsp 	wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_REF_UPDATE_NG,
 297 e70fd952 2024-03-22 stsp 	    PROC_SESSION_WRITE, gotd_session.pid, len);
 298 e70fd952 2024-03-22 stsp 	if (wbuf == NULL)
 299 e70fd952 2024-03-22 stsp 		return got_error_from_errno("imsg_create REF_UPDATE_NG");
 300 e70fd952 2024-03-22 stsp 
 301 e70fd952 2024-03-22 stsp 	if (imsg_add(wbuf, &ing, sizeof(ing)) == -1)
 302 e70fd952 2024-03-22 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
 303 e70fd952 2024-03-22 stsp 	if (imsg_add(wbuf, refname, ing.name_len) == -1)
 304 e70fd952 2024-03-22 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
 305 e70fd952 2024-03-22 stsp 	if (imsg_add(wbuf, ng_err->msg, ing.reason_len) == -1)
 306 e70fd952 2024-03-22 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
 307 e70fd952 2024-03-22 stsp 
 308 e70fd952 2024-03-22 stsp 	imsg_close(&iev->ibuf, wbuf);
 309 e70fd952 2024-03-22 stsp 	gotd_imsg_event_add(iev);
 310 e70fd952 2024-03-22 stsp 	return NULL;
 311 e70fd952 2024-03-22 stsp }
 312 e70fd952 2024-03-22 stsp 
 313 e70fd952 2024-03-22 stsp static const struct got_error *
 314 e70fd952 2024-03-22 stsp install_pack(struct gotd_session_client *client, const char *repo_path,
 315 e70fd952 2024-03-22 stsp     struct imsg *imsg)
 316 e70fd952 2024-03-22 stsp {
 317 e70fd952 2024-03-22 stsp 	const struct got_error *err = NULL;
 318 e70fd952 2024-03-22 stsp 	struct gotd_imsg_packfile_install inst;
 319 e70fd952 2024-03-22 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
 320 e70fd952 2024-03-22 stsp 	size_t datalen;
 321 e70fd952 2024-03-22 stsp 	char *packfile_path = NULL, *packidx_path = NULL;
 322 e70fd952 2024-03-22 stsp 
 323 e70fd952 2024-03-22 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 324 e70fd952 2024-03-22 stsp 	if (datalen != sizeof(inst))
 325 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 326 e70fd952 2024-03-22 stsp 	memcpy(&inst, imsg->data, sizeof(inst));
 327 e70fd952 2024-03-22 stsp 
 328 e70fd952 2024-03-22 stsp 	if (client->packfile_path == NULL)
 329 e70fd952 2024-03-22 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
 330 e70fd952 2024-03-22 stsp 		    "client has no pack file");
 331 e70fd952 2024-03-22 stsp 	if (client->packidx_path == NULL)
 332 e70fd952 2024-03-22 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
 333 e70fd952 2024-03-22 stsp 		    "client has no pack file index");
 334 e70fd952 2024-03-22 stsp 
 335 e70fd952 2024-03-22 stsp 	if (got_sha1_digest_to_str(inst.pack_sha1, hex, sizeof(hex)) == NULL)
 336 e70fd952 2024-03-22 stsp 		return got_error_msg(GOT_ERR_NO_SPACE,
 337 e70fd952 2024-03-22 stsp 		    "could not convert pack file SHA1 to hex");
 338 e70fd952 2024-03-22 stsp 
 339 e70fd952 2024-03-22 stsp 	if (asprintf(&packfile_path, "/%s/%s/pack-%s.pack",
 340 e70fd952 2024-03-22 stsp 	    repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
 341 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("asprintf");
 342 e70fd952 2024-03-22 stsp 		goto done;
 343 e70fd952 2024-03-22 stsp 	}
 344 e70fd952 2024-03-22 stsp 
 345 e70fd952 2024-03-22 stsp 	if (asprintf(&packidx_path, "/%s/%s/pack-%s.idx",
 346 e70fd952 2024-03-22 stsp 	    repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
 347 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("asprintf");
 348 e70fd952 2024-03-22 stsp 		goto done;
 349 e70fd952 2024-03-22 stsp 	}
 350 e70fd952 2024-03-22 stsp 
 351 e70fd952 2024-03-22 stsp 	if (rename(client->packfile_path, packfile_path) == -1) {
 352 e70fd952 2024-03-22 stsp 		err = got_error_from_errno3("rename", client->packfile_path,
 353 e70fd952 2024-03-22 stsp 		    packfile_path);
 354 e70fd952 2024-03-22 stsp 		goto done;
 355 e70fd952 2024-03-22 stsp 	}
 356 e70fd952 2024-03-22 stsp 
 357 e70fd952 2024-03-22 stsp 	free(client->packfile_path);
 358 e70fd952 2024-03-22 stsp 	client->packfile_path = NULL;
 359 e70fd952 2024-03-22 stsp 
 360 e70fd952 2024-03-22 stsp 	if (rename(client->packidx_path, packidx_path) == -1) {
 361 e70fd952 2024-03-22 stsp 		err = got_error_from_errno3("rename", client->packidx_path,
 362 e70fd952 2024-03-22 stsp 		    packidx_path);
 363 e70fd952 2024-03-22 stsp 		goto done;
 364 e70fd952 2024-03-22 stsp 	}
 365 e70fd952 2024-03-22 stsp 
 366 e70fd952 2024-03-22 stsp 	/* Ensure we re-read the pack index list upon next access. */
 367 e70fd952 2024-03-22 stsp 	gotd_session.repo->pack_path_mtime.tv_sec = 0;
 368 e70fd952 2024-03-22 stsp 	gotd_session.repo->pack_path_mtime.tv_nsec = 0;
 369 e70fd952 2024-03-22 stsp 
 370 e70fd952 2024-03-22 stsp 	free(client->packidx_path);
 371 e70fd952 2024-03-22 stsp 	client->packidx_path = NULL;
 372 e70fd952 2024-03-22 stsp done:
 373 e70fd952 2024-03-22 stsp 	free(packfile_path);
 374 e70fd952 2024-03-22 stsp 	free(packidx_path);
 375 e70fd952 2024-03-22 stsp 	return err;
 376 e70fd952 2024-03-22 stsp }
 377 e70fd952 2024-03-22 stsp 
 378 e70fd952 2024-03-22 stsp static const struct got_error *
 379 e70fd952 2024-03-22 stsp begin_ref_updates(struct gotd_session_client *client, struct imsg *imsg)
 380 e70fd952 2024-03-22 stsp {
 381 e70fd952 2024-03-22 stsp 	struct gotd_imsg_ref_updates_start istart;
 382 e70fd952 2024-03-22 stsp 	size_t datalen;
 383 e70fd952 2024-03-22 stsp 
 384 e70fd952 2024-03-22 stsp 	if (client->nref_updates != -1)
 385 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
 386 e70fd952 2024-03-22 stsp 
 387 e70fd952 2024-03-22 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 388 e70fd952 2024-03-22 stsp 	if (datalen != sizeof(istart))
 389 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 390 e70fd952 2024-03-22 stsp 	memcpy(&istart, imsg->data, sizeof(istart));
 391 e70fd952 2024-03-22 stsp 
 392 e70fd952 2024-03-22 stsp 	if (istart.nref_updates <= 0)
 393 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
 394 e70fd952 2024-03-22 stsp 
 395 e70fd952 2024-03-22 stsp 	client->nref_updates = istart.nref_updates;
 396 e70fd952 2024-03-22 stsp 	return NULL;
 397 e70fd952 2024-03-22 stsp }
 398 e70fd952 2024-03-22 stsp 
 399 e70fd952 2024-03-22 stsp static const struct got_error *
 400 e70fd952 2024-03-22 stsp validate_namespace(const char *namespace)
 401 e70fd952 2024-03-22 stsp {
 402 e70fd952 2024-03-22 stsp 	size_t len = strlen(namespace);
 403 e70fd952 2024-03-22 stsp 
 404 e70fd952 2024-03-22 stsp 	if (len < 5 || strncmp("refs/", namespace, 5) != 0 ||
 405 e70fd952 2024-03-22 stsp 	    namespace[len - 1] != '/') {
 406 e70fd952 2024-03-22 stsp 		return got_error_fmt(GOT_ERR_BAD_REF_NAME,
 407 e70fd952 2024-03-22 stsp 		    "reference namespace '%s'", namespace);
 408 e70fd952 2024-03-22 stsp 	}
 409 e70fd952 2024-03-22 stsp 
 410 e70fd952 2024-03-22 stsp 	return NULL;
 411 e70fd952 2024-03-22 stsp }
 412 e70fd952 2024-03-22 stsp 
 413 e70fd952 2024-03-22 stsp static const struct got_error *
 414 e70fd952 2024-03-22 stsp queue_notification(struct got_object_id *old_id, struct got_object_id *new_id,
 415 e70fd952 2024-03-22 stsp     struct got_repository *repo, struct got_reference *ref)
 416 e70fd952 2024-03-22 stsp {
 417 e70fd952 2024-03-22 stsp 	const struct got_error *err = NULL;
 418 e70fd952 2024-03-22 stsp 	struct gotd_repo *repo_cfg = gotd_session.repo_cfg;
 419 e70fd952 2024-03-22 stsp 	struct gotd_imsgev *iev = &gotd_session.repo_child_iev;
 420 e70fd952 2024-03-22 stsp 	struct got_pathlist_entry *pe;
 421 e70fd952 2024-03-22 stsp 	struct gotd_session_notif *notif;
 422 e70fd952 2024-03-22 stsp 
 423 e70fd952 2024-03-22 stsp 	if (iev->ibuf.fd == -1 ||
 424 e70fd952 2024-03-22 stsp 	    STAILQ_EMPTY(&repo_cfg->notification_targets))
 425 e70fd952 2024-03-22 stsp 		return NULL; /* notifications unused */
 426 e70fd952 2024-03-22 stsp 
 427 e70fd952 2024-03-22 stsp 	TAILQ_FOREACH(pe, &repo_cfg->notification_refs, entry) {
 428 e70fd952 2024-03-22 stsp 		const char *refname = pe->path;
 429 e70fd952 2024-03-22 stsp 		if (strcmp(got_ref_get_name(ref), refname) == 0)
 430 e70fd952 2024-03-22 stsp 			break;
 431 e70fd952 2024-03-22 stsp 	}
 432 e70fd952 2024-03-22 stsp 	if (pe == NULL) {
 433 e70fd952 2024-03-22 stsp 		TAILQ_FOREACH(pe, &repo_cfg->notification_ref_namespaces,
 434 e70fd952 2024-03-22 stsp 		    entry) {
 435 e70fd952 2024-03-22 stsp 			const char *namespace = pe->path;
 436 e70fd952 2024-03-22 stsp 
 437 e70fd952 2024-03-22 stsp 			err = validate_namespace(namespace);
 438 e70fd952 2024-03-22 stsp 			if (err)
 439 e70fd952 2024-03-22 stsp 				return err;
 440 e70fd952 2024-03-22 stsp 			if (strncmp(namespace, got_ref_get_name(ref),
 441 e70fd952 2024-03-22 stsp 			    strlen(namespace)) == 0)
 442 e70fd952 2024-03-22 stsp 				break;
 443 e70fd952 2024-03-22 stsp 		}
 444 e70fd952 2024-03-22 stsp 	}
 445 e70fd952 2024-03-22 stsp 
 446 e70fd952 2024-03-22 stsp 	/*
 447 e70fd952 2024-03-22 stsp 	 * If a branch or a reference namespace was specified in the
 448 e70fd952 2024-03-22 stsp 	 * configuration file then only send notifications if a match
 449 e70fd952 2024-03-22 stsp 	 * was found.
 450 e70fd952 2024-03-22 stsp 	 */
 451 e70fd952 2024-03-22 stsp 	if (pe == NULL && (!TAILQ_EMPTY(&repo_cfg->notification_refs) ||
 452 e70fd952 2024-03-22 stsp 	    !TAILQ_EMPTY(&repo_cfg->notification_ref_namespaces)))
 453 e70fd952 2024-03-22 stsp 		return NULL;
 454 e70fd952 2024-03-22 stsp 
 455 e70fd952 2024-03-22 stsp 	notif = calloc(1, sizeof(*notif));
 456 e70fd952 2024-03-22 stsp 	if (notif == NULL)
 457 e70fd952 2024-03-22 stsp 		return got_error_from_errno("calloc");
 458 e70fd952 2024-03-22 stsp 
 459 e70fd952 2024-03-22 stsp 	notif->fd = -1;
 460 e70fd952 2024-03-22 stsp 
 461 e70fd952 2024-03-22 stsp 	if (old_id == NULL)
 462 e70fd952 2024-03-22 stsp 		notif->action = GOTD_NOTIF_ACTION_CREATED;
 463 e70fd952 2024-03-22 stsp 	else if (new_id == NULL)
 464 e70fd952 2024-03-22 stsp 		notif->action = GOTD_NOTIF_ACTION_REMOVED;
 465 e70fd952 2024-03-22 stsp 	else
 466 e70fd952 2024-03-22 stsp 		notif->action = GOTD_NOTIF_ACTION_CHANGED;
 467 e70fd952 2024-03-22 stsp 
 468 e70fd952 2024-03-22 stsp 	if (old_id != NULL)
 469 e70fd952 2024-03-22 stsp 		memcpy(&notif->old_id, old_id, sizeof(notif->old_id));
 470 e70fd952 2024-03-22 stsp 	if (new_id != NULL)
 471 e70fd952 2024-03-22 stsp 		memcpy(&notif->new_id, new_id, sizeof(notif->new_id));
 472 e70fd952 2024-03-22 stsp 
 473 e70fd952 2024-03-22 stsp 	notif->refname = strdup(got_ref_get_name(ref));
 474 e70fd952 2024-03-22 stsp 	if (notif->refname == NULL) {
 475 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("strdup");
 476 e70fd952 2024-03-22 stsp 		goto done;
 477 e70fd952 2024-03-22 stsp 	}
 478 e70fd952 2024-03-22 stsp 
 479 e70fd952 2024-03-22 stsp 	STAILQ_INSERT_TAIL(&notifications, notif, entry);
 480 e70fd952 2024-03-22 stsp done:
 481 e70fd952 2024-03-22 stsp 	if (err && notif) {
 482 e70fd952 2024-03-22 stsp 		free(notif->refname);
 483 e70fd952 2024-03-22 stsp 		free(notif);
 484 e70fd952 2024-03-22 stsp 	}
 485 e70fd952 2024-03-22 stsp 	return err;
 486 e70fd952 2024-03-22 stsp }
 487 e70fd952 2024-03-22 stsp 
 488 e70fd952 2024-03-22 stsp /* Forward notification content to the NOTIFY process. */
 489 e70fd952 2024-03-22 stsp static const struct got_error *
 490 e70fd952 2024-03-22 stsp forward_notification(struct gotd_session_client *client, struct imsg *imsg)
 491 e70fd952 2024-03-22 stsp {
 492 e70fd952 2024-03-22 stsp 	const struct got_error *err = NULL;
 493 e70fd952 2024-03-22 stsp 	struct gotd_imsgev *iev = &gotd_session.notifier_iev;
 494 e70fd952 2024-03-22 stsp 	struct gotd_session_notif *notif;
 495 e70fd952 2024-03-22 stsp 	struct gotd_imsg_notification_content icontent;
 496 1ddd9d55 2024-05-10 stsp 	char *refname = NULL, *id_str = NULL;
 497 e70fd952 2024-03-22 stsp 	size_t datalen;
 498 e70fd952 2024-03-22 stsp 	struct gotd_imsg_notify inotify;
 499 e70fd952 2024-03-22 stsp 	const char *action;
 500 d36998ae 2024-04-29 stsp 	struct ibuf *wbuf;
 501 e70fd952 2024-03-22 stsp 
 502 e70fd952 2024-03-22 stsp 	memset(&inotify, 0, sizeof(inotify));
 503 e70fd952 2024-03-22 stsp 
 504 e70fd952 2024-03-22 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 505 e70fd952 2024-03-22 stsp 	if (datalen < sizeof(icontent))
 506 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 507 e70fd952 2024-03-22 stsp 	memcpy(&icontent, imsg->data, sizeof(icontent));
 508 e70fd952 2024-03-22 stsp 	if (datalen != sizeof(icontent) + icontent.refname_len)
 509 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 510 e70fd952 2024-03-22 stsp 	refname = strndup(imsg->data + sizeof(icontent), icontent.refname_len);
 511 e70fd952 2024-03-22 stsp 	if (refname == NULL)
 512 e70fd952 2024-03-22 stsp 		return got_error_from_errno("strndup");
 513 e70fd952 2024-03-22 stsp 
 514 e70fd952 2024-03-22 stsp 	notif = STAILQ_FIRST(&notifications);
 515 e70fd952 2024-03-22 stsp 	if (notif == NULL)
 516 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
 517 e70fd952 2024-03-22 stsp 
 518 e70fd952 2024-03-22 stsp 	STAILQ_REMOVE(&notifications, notif, gotd_session_notif, entry);
 519 e70fd952 2024-03-22 stsp 
 520 e70fd952 2024-03-22 stsp 	if (notif->action != icontent.action || notif->fd == -1 ||
 521 e70fd952 2024-03-22 stsp 	    strcmp(notif->refname, refname) != 0) {
 522 e70fd952 2024-03-22 stsp 		err = got_error(GOT_ERR_PRIVSEP_MSG);
 523 e70fd952 2024-03-22 stsp 		goto done;
 524 e70fd952 2024-03-22 stsp 	}
 525 e70fd952 2024-03-22 stsp 	if (notif->action == GOTD_NOTIF_ACTION_CREATED) {
 526 1b1a386d 2024-07-09 op 		if (memcmp(&notif->new_id, &icontent.new_id,
 527 1b1a386d 2024-07-09 op 		    sizeof(notif->new_id)) != 0) {
 528 e70fd952 2024-03-22 stsp 			err = got_error_msg(GOT_ERR_PRIVSEP_MSG,
 529 e70fd952 2024-03-22 stsp 			    "received notification content for unknown event");
 530 e70fd952 2024-03-22 stsp 			goto done;
 531 e70fd952 2024-03-22 stsp 		}
 532 e70fd952 2024-03-22 stsp 	} else if (notif->action == GOTD_NOTIF_ACTION_REMOVED) {
 533 1b1a386d 2024-07-09 op 		if (memcmp(&notif->old_id, &icontent.old_id,
 534 1b1a386d 2024-07-09 op 		    sizeof(notif->old_id)) != 0) {
 535 e70fd952 2024-03-22 stsp 			err = got_error_msg(GOT_ERR_PRIVSEP_MSG,
 536 e70fd952 2024-03-22 stsp 			    "received notification content for unknown event");
 537 e70fd952 2024-03-22 stsp 			goto done;
 538 e70fd952 2024-03-22 stsp 		}
 539 1b1a386d 2024-07-09 op 	} else if (memcmp(&notif->old_id, &icontent.old_id,
 540 1b1a386d 2024-07-09 op 	    sizeof(notif->old_id)) != 0 ||
 541 1b1a386d 2024-07-09 op 	    memcmp(&notif->new_id, &icontent.new_id,
 542 1b1a386d 2024-07-09 op 	    sizeof(notif->old_id)) != 0) {
 543 e70fd952 2024-03-22 stsp 		err = got_error_msg(GOT_ERR_PRIVSEP_MSG,
 544 e70fd952 2024-03-22 stsp 		    "received notification content for unknown event");
 545 e70fd952 2024-03-22 stsp 		goto done;
 546 e70fd952 2024-03-22 stsp 	}
 547 e70fd952 2024-03-22 stsp 
 548 e70fd952 2024-03-22 stsp 	switch (notif->action) {
 549 e70fd952 2024-03-22 stsp 	case GOTD_NOTIF_ACTION_CREATED:
 550 e70fd952 2024-03-22 stsp 		action = "created";
 551 1ddd9d55 2024-05-10 stsp 		err = got_object_id_str(&id_str, &notif->new_id);
 552 1ddd9d55 2024-05-10 stsp 		if (err)
 553 1ddd9d55 2024-05-10 stsp 			goto done;
 554 e70fd952 2024-03-22 stsp 		break;
 555 e70fd952 2024-03-22 stsp 	case GOTD_NOTIF_ACTION_REMOVED:
 556 e70fd952 2024-03-22 stsp 		action = "removed";
 557 1ddd9d55 2024-05-10 stsp 		err = got_object_id_str(&id_str, &notif->old_id);
 558 1ddd9d55 2024-05-10 stsp 		if (err)
 559 1ddd9d55 2024-05-10 stsp 			goto done;
 560 e70fd952 2024-03-22 stsp 		break;
 561 e70fd952 2024-03-22 stsp 	case GOTD_NOTIF_ACTION_CHANGED:
 562 e70fd952 2024-03-22 stsp 		action = "changed";
 563 1ddd9d55 2024-05-10 stsp 		err = got_object_id_str(&id_str, &notif->new_id);
 564 1ddd9d55 2024-05-10 stsp 		if (err)
 565 1ddd9d55 2024-05-10 stsp 			goto done;
 566 e70fd952 2024-03-22 stsp 		break;
 567 e70fd952 2024-03-22 stsp 	default:
 568 e70fd952 2024-03-22 stsp 		err = got_error(GOT_ERR_PRIVSEP_MSG);
 569 e70fd952 2024-03-22 stsp 		goto done;
 570 e70fd952 2024-03-22 stsp 	}
 571 e70fd952 2024-03-22 stsp 
 572 e70fd952 2024-03-22 stsp 	strlcpy(inotify.repo_name, gotd_session.repo_cfg->name,
 573 e70fd952 2024-03-22 stsp 	    sizeof(inotify.repo_name));
 574 e70fd952 2024-03-22 stsp 
 575 e70fd952 2024-03-22 stsp 	snprintf(inotify.subject_line, sizeof(inotify.subject_line),
 576 1ddd9d55 2024-05-10 stsp 	    "%s: %s %s %s: %.12s", gotd_session.repo_cfg->name,
 577 1ddd9d55 2024-05-10 stsp 	    client->username, action, notif->refname, id_str);
 578 e70fd952 2024-03-22 stsp 
 579 d36998ae 2024-04-29 stsp 	inotify.username_len = strlen(client->username);
 580 d36998ae 2024-04-29 stsp 	wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_NOTIFY,
 581 d36998ae 2024-04-29 stsp 	    PROC_SESSION_WRITE, gotd_session.pid,
 582 d36998ae 2024-04-29 stsp 	    sizeof(inotify) + inotify.username_len);
 583 d36998ae 2024-04-29 stsp 	if (wbuf == NULL) {
 584 d36998ae 2024-04-29 stsp 		err = got_error_from_errno("imsg_create NOTIFY");
 585 d36998ae 2024-04-29 stsp 		goto done;
 586 d36998ae 2024-04-29 stsp 	}
 587 d36998ae 2024-04-29 stsp 	if (imsg_add(wbuf, &inotify, sizeof(inotify)) == -1) {
 588 d36998ae 2024-04-29 stsp 		err = got_error_from_errno("imsg_add NOTIFY");
 589 e70fd952 2024-03-22 stsp 		goto done;
 590 e70fd952 2024-03-22 stsp 	}
 591 d36998ae 2024-04-29 stsp 	if (imsg_add(wbuf, client->username, inotify.username_len) == -1) {
 592 d36998ae 2024-04-29 stsp 		err = got_error_from_errno("imsg_add NOTIFY");
 593 d36998ae 2024-04-29 stsp 		goto done;
 594 d36998ae 2024-04-29 stsp 	}
 595 d36998ae 2024-04-29 stsp 
 596 d36998ae 2024-04-29 stsp 	ibuf_fd_set(wbuf, notif->fd);
 597 e70fd952 2024-03-22 stsp 	notif->fd = -1;
 598 d36998ae 2024-04-29 stsp 
 599 d36998ae 2024-04-29 stsp 	imsg_close(&iev->ibuf, wbuf);
 600 d36998ae 2024-04-29 stsp 	gotd_imsg_event_add(iev);
 601 e70fd952 2024-03-22 stsp done:
 602 e70fd952 2024-03-22 stsp 	if (notif->fd != -1)
 603 e70fd952 2024-03-22 stsp 		close(notif->fd);
 604 e70fd952 2024-03-22 stsp 	free(notif);
 605 e70fd952 2024-03-22 stsp 	free(refname);
 606 1ddd9d55 2024-05-10 stsp 	free(id_str);
 607 e70fd952 2024-03-22 stsp 	return err;
 608 e70fd952 2024-03-22 stsp }
 609 e70fd952 2024-03-22 stsp 
 610 e70fd952 2024-03-22 stsp /* Request notification content from REPO_WRITE process. */
 611 e70fd952 2024-03-22 stsp static const struct got_error *
 612 e70fd952 2024-03-22 stsp request_notification(struct gotd_session_notif *notif)
 613 e70fd952 2024-03-22 stsp {
 614 e70fd952 2024-03-22 stsp 	const struct got_error *err = NULL;
 615 e70fd952 2024-03-22 stsp 	struct gotd_imsgev *iev = &gotd_session.repo_child_iev;
 616 e70fd952 2024-03-22 stsp 	struct gotd_imsg_notification_content icontent;
 617 e70fd952 2024-03-22 stsp 	struct ibuf *wbuf;
 618 e70fd952 2024-03-22 stsp 	size_t len;
 619 e70fd952 2024-03-22 stsp 	int fd;
 620 e70fd952 2024-03-22 stsp 
 621 e70fd952 2024-03-22 stsp 	fd = got_opentempfd();
 622 e70fd952 2024-03-22 stsp 	if (fd == -1)
 623 e70fd952 2024-03-22 stsp 		return got_error_from_errno("got_opentemp");
 624 e70fd952 2024-03-22 stsp 
 625 e70fd952 2024-03-22 stsp 	memset(&icontent, 0, sizeof(icontent));
 626 e70fd952 2024-03-22 stsp 
 627 e70fd952 2024-03-22 stsp 	icontent.action = notif->action;
 628 e70fd952 2024-03-22 stsp 	memcpy(&icontent.old_id, &notif->old_id, sizeof(notif->old_id));
 629 e70fd952 2024-03-22 stsp 	memcpy(&icontent.new_id, &notif->new_id, sizeof(notif->new_id));
 630 e70fd952 2024-03-22 stsp 	icontent.refname_len = strlen(notif->refname);
 631 e70fd952 2024-03-22 stsp 
 632 e70fd952 2024-03-22 stsp 	len = sizeof(icontent) + icontent.refname_len;
 633 e70fd952 2024-03-22 stsp 	wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_NOTIFY,
 634 e70fd952 2024-03-22 stsp 	    PROC_SESSION_WRITE, gotd_session.pid, len);
 635 e70fd952 2024-03-22 stsp 	if (wbuf == NULL) {
 636 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("imsg_create NOTIFY");
 637 e70fd952 2024-03-22 stsp 		goto done;
 638 e70fd952 2024-03-22 stsp 	}
 639 e70fd952 2024-03-22 stsp 	if (imsg_add(wbuf, &icontent, sizeof(icontent)) == -1) {
 640 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("imsg_add NOTIFY");
 641 e70fd952 2024-03-22 stsp 		goto done;
 642 e70fd952 2024-03-22 stsp 	}
 643 e70fd952 2024-03-22 stsp 	if (imsg_add(wbuf, notif->refname, icontent.refname_len) == -1) {
 644 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("imsg_add NOTIFY");
 645 e70fd952 2024-03-22 stsp 		goto done;
 646 e70fd952 2024-03-22 stsp 	}
 647 e70fd952 2024-03-22 stsp 
 648 e70fd952 2024-03-22 stsp 	notif->fd = dup(fd);
 649 e70fd952 2024-03-22 stsp 	if (notif->fd == -1) {
 650 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("dup");
 651 e70fd952 2024-03-22 stsp 		goto done;
 652 e70fd952 2024-03-22 stsp 	}
 653 e70fd952 2024-03-22 stsp 
 654 e70fd952 2024-03-22 stsp 	ibuf_fd_set(wbuf, fd);
 655 e70fd952 2024-03-22 stsp 	fd = -1;
 656 e70fd952 2024-03-22 stsp 
 657 e70fd952 2024-03-22 stsp 	imsg_close(&iev->ibuf, wbuf);
 658 e70fd952 2024-03-22 stsp 	gotd_imsg_event_add(iev);
 659 e70fd952 2024-03-22 stsp done:
 660 e70fd952 2024-03-22 stsp 	if (err && fd != -1)
 661 e70fd952 2024-03-22 stsp 		close(fd);
 662 e70fd952 2024-03-22 stsp 	return err;
 663 e70fd952 2024-03-22 stsp }
 664 e70fd952 2024-03-22 stsp 
 665 e70fd952 2024-03-22 stsp static const struct got_error *
 666 e70fd952 2024-03-22 stsp update_ref(int *shut, struct gotd_session_client *client,
 667 e70fd952 2024-03-22 stsp     const char *repo_path, struct imsg *imsg)
 668 e70fd952 2024-03-22 stsp {
 669 e70fd952 2024-03-22 stsp 	const struct got_error *err = NULL;
 670 e70fd952 2024-03-22 stsp 	struct got_repository *repo = gotd_session.repo;
 671 e70fd952 2024-03-22 stsp 	struct got_reference *ref = NULL;
 672 e70fd952 2024-03-22 stsp 	struct gotd_imsg_ref_update iref;
 673 e70fd952 2024-03-22 stsp 	struct got_object_id old_id, new_id;
 674 e70fd952 2024-03-22 stsp 	struct gotd_session_notif *notif;
 675 e70fd952 2024-03-22 stsp 	struct got_object_id *id = NULL;
 676 e70fd952 2024-03-22 stsp 	char *refname = NULL;
 677 e70fd952 2024-03-22 stsp 	size_t datalen;
 678 e70fd952 2024-03-22 stsp 	int locked = 0;
 679 e70fd952 2024-03-22 stsp 	char hex1[SHA1_DIGEST_STRING_LENGTH];
 680 e70fd952 2024-03-22 stsp 	char hex2[SHA1_DIGEST_STRING_LENGTH];
 681 e70fd952 2024-03-22 stsp 
 682 e70fd952 2024-03-22 stsp 	log_debug("update-ref from uid %d", client->euid);
 683 e70fd952 2024-03-22 stsp 
 684 e70fd952 2024-03-22 stsp 	if (client->nref_updates <= 0)
 685 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
 686 e70fd952 2024-03-22 stsp 
 687 e70fd952 2024-03-22 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 688 e70fd952 2024-03-22 stsp 	if (datalen < sizeof(iref))
 689 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 690 e70fd952 2024-03-22 stsp 	memcpy(&iref, imsg->data, sizeof(iref));
 691 e70fd952 2024-03-22 stsp 	if (datalen != sizeof(iref) + iref.name_len)
 692 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 693 e70fd952 2024-03-22 stsp 	refname = strndup(imsg->data + sizeof(iref), iref.name_len);
 694 e70fd952 2024-03-22 stsp 	if (refname == NULL)
 695 e70fd952 2024-03-22 stsp 		return got_error_from_errno("strndup");
 696 e70fd952 2024-03-22 stsp 
 697 e70fd952 2024-03-22 stsp 	log_debug("updating ref %s for uid %d", refname, client->euid);
 698 e70fd952 2024-03-22 stsp 
 699 be12ea2c 2024-07-11 op 	memset(&old_id, 0, sizeof(old_id));
 700 aaa34732 2024-07-13 op 	memcpy(old_id.hash, iref.old_id, SHA1_DIGEST_LENGTH);
 701 be12ea2c 2024-07-11 op 	memset(&new_id, 0, sizeof(new_id));
 702 aaa34732 2024-07-13 op 	memcpy(new_id.hash, iref.new_id, SHA1_DIGEST_LENGTH);
 703 e70fd952 2024-03-22 stsp 	err = got_repo_find_object_id(iref.delete_ref ? &old_id : &new_id,
 704 e70fd952 2024-03-22 stsp 	    repo);
 705 e70fd952 2024-03-22 stsp 	if (err)
 706 e70fd952 2024-03-22 stsp 		goto done;
 707 e70fd952 2024-03-22 stsp 
 708 e70fd952 2024-03-22 stsp 	if (iref.ref_is_new) {
 709 e70fd952 2024-03-22 stsp 		err = got_ref_open(&ref, repo, refname, 0);
 710 e70fd952 2024-03-22 stsp 		if (err) {
 711 e70fd952 2024-03-22 stsp 			if (err->code != GOT_ERR_NOT_REF)
 712 e70fd952 2024-03-22 stsp 				goto done;
 713 e70fd952 2024-03-22 stsp 			err = got_ref_alloc(&ref, refname, &new_id);
 714 e70fd952 2024-03-22 stsp 			if (err)
 715 e70fd952 2024-03-22 stsp 				goto done;
 716 e70fd952 2024-03-22 stsp 			err = got_ref_write(ref, repo); /* will lock/unlock */
 717 e70fd952 2024-03-22 stsp 			if (err)
 718 e70fd952 2024-03-22 stsp 				goto done;
 719 e70fd952 2024-03-22 stsp 			err = queue_notification(NULL, &new_id, repo, ref);
 720 e70fd952 2024-03-22 stsp 			if (err)
 721 e70fd952 2024-03-22 stsp 				goto done;
 722 e70fd952 2024-03-22 stsp 		} else {
 723 e70fd952 2024-03-22 stsp 			err = got_ref_resolve(&id, repo, ref);
 724 e70fd952 2024-03-22 stsp 			if (err)
 725 e70fd952 2024-03-22 stsp 				goto done;
 726 e70fd952 2024-03-22 stsp 			got_object_id_hex(&new_id, hex1, sizeof(hex1));
 727 e70fd952 2024-03-22 stsp 			got_object_id_hex(id, hex2, sizeof(hex2));
 728 e70fd952 2024-03-22 stsp 			err = got_error_fmt(GOT_ERR_REF_BUSY,
 729 e70fd952 2024-03-22 stsp 			    "Addition %s: %s failed; %s: %s has been "
 730 e70fd952 2024-03-22 stsp 			    "created by someone else while transaction "
 731 e70fd952 2024-03-22 stsp 			    "was in progress",
 732 e70fd952 2024-03-22 stsp 			    got_ref_get_name(ref), hex1,
 733 e70fd952 2024-03-22 stsp 			    got_ref_get_name(ref), hex2);
 734 e70fd952 2024-03-22 stsp 			goto done;
 735 e70fd952 2024-03-22 stsp 		}
 736 e70fd952 2024-03-22 stsp 	} else if (iref.delete_ref) {
 737 e70fd952 2024-03-22 stsp 		err = got_ref_open(&ref, repo, refname, 1 /* lock */);
 738 e70fd952 2024-03-22 stsp 		if (err)
 739 e70fd952 2024-03-22 stsp 			goto done;
 740 e70fd952 2024-03-22 stsp 		locked = 1;
 741 e70fd952 2024-03-22 stsp 
 742 e70fd952 2024-03-22 stsp 		err = got_ref_resolve(&id, repo, ref);
 743 e70fd952 2024-03-22 stsp 		if (err)
 744 e70fd952 2024-03-22 stsp 			goto done;
 745 e70fd952 2024-03-22 stsp 
 746 e70fd952 2024-03-22 stsp 		if (got_object_id_cmp(id, &old_id) != 0) {
 747 e70fd952 2024-03-22 stsp 			got_object_id_hex(&old_id, hex1, sizeof(hex1));
 748 e70fd952 2024-03-22 stsp 			got_object_id_hex(id, hex2, sizeof(hex2));
 749 e70fd952 2024-03-22 stsp 			err = got_error_fmt(GOT_ERR_REF_BUSY,
 750 e70fd952 2024-03-22 stsp 			    "Deletion %s: %s failed; %s: %s has been "
 751 e70fd952 2024-03-22 stsp 			    "created by someone else while transaction "
 752 e70fd952 2024-03-22 stsp 			    "was in progress",
 753 e70fd952 2024-03-22 stsp 			    got_ref_get_name(ref), hex1,
 754 e70fd952 2024-03-22 stsp 			    got_ref_get_name(ref), hex2);
 755 e70fd952 2024-03-22 stsp 			goto done;
 756 e70fd952 2024-03-22 stsp 		}
 757 e70fd952 2024-03-22 stsp 
 758 e70fd952 2024-03-22 stsp 		err = got_ref_delete(ref, repo);
 759 e70fd952 2024-03-22 stsp 		if (err)
 760 e70fd952 2024-03-22 stsp 			goto done;
 761 e70fd952 2024-03-22 stsp 		err = queue_notification(&old_id, NULL, repo, ref);
 762 e70fd952 2024-03-22 stsp 		if (err)
 763 e70fd952 2024-03-22 stsp 			goto done;
 764 e70fd952 2024-03-22 stsp 		free(id);
 765 e70fd952 2024-03-22 stsp 		id = NULL;
 766 e70fd952 2024-03-22 stsp 	} else {
 767 e70fd952 2024-03-22 stsp 		err = got_ref_open(&ref, repo, refname, 1 /* lock */);
 768 e70fd952 2024-03-22 stsp 		if (err)
 769 e70fd952 2024-03-22 stsp 			goto done;
 770 e70fd952 2024-03-22 stsp 		locked = 1;
 771 e70fd952 2024-03-22 stsp 
 772 e70fd952 2024-03-22 stsp 		err = got_ref_resolve(&id, repo, ref);
 773 e70fd952 2024-03-22 stsp 		if (err)
 774 e70fd952 2024-03-22 stsp 			goto done;
 775 e70fd952 2024-03-22 stsp 
 776 e70fd952 2024-03-22 stsp 		if (got_object_id_cmp(id, &old_id) != 0) {
 777 e70fd952 2024-03-22 stsp 			got_object_id_hex(&old_id, hex1, sizeof(hex1));
 778 e70fd952 2024-03-22 stsp 			got_object_id_hex(id, hex2, sizeof(hex2));
 779 e70fd952 2024-03-22 stsp 			err = got_error_fmt(GOT_ERR_REF_BUSY,
 780 e70fd952 2024-03-22 stsp 			    "Update %s: %s failed; %s: %s has been "
 781 e70fd952 2024-03-22 stsp 			    "created by someone else while transaction "
 782 e70fd952 2024-03-22 stsp 			    "was in progress",
 783 e70fd952 2024-03-22 stsp 			    got_ref_get_name(ref), hex1,
 784 e70fd952 2024-03-22 stsp 			    got_ref_get_name(ref), hex2);
 785 e70fd952 2024-03-22 stsp 			goto done;
 786 e70fd952 2024-03-22 stsp 		}
 787 e70fd952 2024-03-22 stsp 
 788 e70fd952 2024-03-22 stsp 		if (got_object_id_cmp(&new_id, &old_id) != 0) {
 789 e70fd952 2024-03-22 stsp 			err = got_ref_change_ref(ref, &new_id);
 790 e70fd952 2024-03-22 stsp 			if (err)
 791 e70fd952 2024-03-22 stsp 				goto done;
 792 e70fd952 2024-03-22 stsp 			err = got_ref_write(ref, repo);
 793 e70fd952 2024-03-22 stsp 			if (err)
 794 e70fd952 2024-03-22 stsp 				goto done;
 795 e70fd952 2024-03-22 stsp 			err = queue_notification(&old_id, &new_id, repo, ref);
 796 e70fd952 2024-03-22 stsp 			if (err)
 797 e70fd952 2024-03-22 stsp 				goto done;
 798 e70fd952 2024-03-22 stsp 		}
 799 e70fd952 2024-03-22 stsp 
 800 e70fd952 2024-03-22 stsp 		free(id);
 801 e70fd952 2024-03-22 stsp 		id = NULL;
 802 e70fd952 2024-03-22 stsp 	}
 803 e70fd952 2024-03-22 stsp done:
 804 e70fd952 2024-03-22 stsp 	if (err) {
 805 e70fd952 2024-03-22 stsp 		if (err->code == GOT_ERR_LOCKFILE_TIMEOUT) {
 806 e70fd952 2024-03-22 stsp 			err = got_error_fmt(GOT_ERR_LOCKFILE_TIMEOUT,
 807 e70fd952 2024-03-22 stsp 			    "could not acquire exclusive file lock for %s",
 808 e70fd952 2024-03-22 stsp 			    refname);
 809 e70fd952 2024-03-22 stsp 		}
 810 e70fd952 2024-03-22 stsp 		send_ref_update_ng(client, &iref, refname, err->msg);
 811 e70fd952 2024-03-22 stsp 	} else
 812 e70fd952 2024-03-22 stsp 		send_ref_update_ok(client, &iref, refname);
 813 e70fd952 2024-03-22 stsp 
 814 e70fd952 2024-03-22 stsp 	if (client->nref_updates > 0) {
 815 e70fd952 2024-03-22 stsp 		client->nref_updates--;
 816 e70fd952 2024-03-22 stsp 		if (client->nref_updates == 0) {
 817 e70fd952 2024-03-22 stsp 			send_refs_updated(client);
 818 e70fd952 2024-03-22 stsp 			notif = STAILQ_FIRST(&notifications);
 819 e70fd952 2024-03-22 stsp 			if (notif) {
 820 e70fd952 2024-03-22 stsp 				gotd_session.state = GOTD_STATE_NOTIFY;
 821 e70fd952 2024-03-22 stsp 				err = request_notification(notif);
 822 e70fd952 2024-03-22 stsp 				if (err) {
 823 e70fd952 2024-03-22 stsp 					log_warn("could not send notification: "
 824 e70fd952 2024-03-22 stsp 					    "%s", err->msg);
 825 e70fd952 2024-03-22 stsp 					client->flush_disconnect = 1;
 826 e70fd952 2024-03-22 stsp 				}
 827 e70fd952 2024-03-22 stsp 			} else
 828 e70fd952 2024-03-22 stsp 				client->flush_disconnect = 1;
 829 e70fd952 2024-03-22 stsp 		}
 830 e70fd952 2024-03-22 stsp 
 831 e70fd952 2024-03-22 stsp 	}
 832 e70fd952 2024-03-22 stsp 	if (locked) {
 833 e70fd952 2024-03-22 stsp 		const struct got_error *unlock_err;
 834 e70fd952 2024-03-22 stsp 		unlock_err = got_ref_unlock(ref);
 835 e70fd952 2024-03-22 stsp 		if (unlock_err && err == NULL)
 836 e70fd952 2024-03-22 stsp 			err = unlock_err;
 837 e70fd952 2024-03-22 stsp 	}
 838 e70fd952 2024-03-22 stsp 	if (ref)
 839 e70fd952 2024-03-22 stsp 		got_ref_close(ref);
 840 e70fd952 2024-03-22 stsp 	free(refname);
 841 e70fd952 2024-03-22 stsp 	free(id);
 842 e70fd952 2024-03-22 stsp 	return err;
 843 e70fd952 2024-03-22 stsp }
 844 e70fd952 2024-03-22 stsp 
 845 e70fd952 2024-03-22 stsp static const struct got_error *
 846 e70fd952 2024-03-22 stsp recv_notification_content(struct imsg *imsg)
 847 e70fd952 2024-03-22 stsp {
 848 e70fd952 2024-03-22 stsp 	struct gotd_imsg_notification_content inotif;
 849 e70fd952 2024-03-22 stsp 	size_t datalen;
 850 e70fd952 2024-03-22 stsp 
 851 e70fd952 2024-03-22 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 852 e70fd952 2024-03-22 stsp 	if (datalen < sizeof(inotif))
 853 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 854 e70fd952 2024-03-22 stsp 	memcpy(&inotif, imsg->data, sizeof(inotif));
 855 e70fd952 2024-03-22 stsp 
 856 e70fd952 2024-03-22 stsp 	return NULL;
 857 e70fd952 2024-03-22 stsp }
 858 e70fd952 2024-03-22 stsp 
 859 e70fd952 2024-03-22 stsp static void
 860 e70fd952 2024-03-22 stsp session_dispatch_repo_child(int fd, short event, void *arg)
 861 e70fd952 2024-03-22 stsp {
 862 e70fd952 2024-03-22 stsp 	struct gotd_imsgev *iev = arg;
 863 e70fd952 2024-03-22 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
 864 e70fd952 2024-03-22 stsp 	struct gotd_session_client *client = &gotd_session_client;
 865 e70fd952 2024-03-22 stsp 	ssize_t n;
 866 e70fd952 2024-03-22 stsp 	int shut = 0;
 867 e70fd952 2024-03-22 stsp 	struct imsg imsg;
 868 e70fd952 2024-03-22 stsp 
 869 e70fd952 2024-03-22 stsp 	if (event & EV_READ) {
 870 e70fd952 2024-03-22 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
 871 e70fd952 2024-03-22 stsp 			fatal("imsg_read error");
 872 e70fd952 2024-03-22 stsp 		if (n == 0) {
 873 e70fd952 2024-03-22 stsp 			/* Connection closed. */
 874 e70fd952 2024-03-22 stsp 			shut = 1;
 875 e70fd952 2024-03-22 stsp 			goto done;
 876 e70fd952 2024-03-22 stsp 		}
 877 e70fd952 2024-03-22 stsp 	}
 878 e70fd952 2024-03-22 stsp 
 879 e70fd952 2024-03-22 stsp 	if (event & EV_WRITE) {
 880 e70fd952 2024-03-22 stsp 		n = msgbuf_write(&ibuf->w);
 881 e70fd952 2024-03-22 stsp 		if (n == -1 && errno != EAGAIN)
 882 e70fd952 2024-03-22 stsp 			fatal("msgbuf_write");
 883 e70fd952 2024-03-22 stsp 		if (n == 0) {
 884 e70fd952 2024-03-22 stsp 			/* Connection closed. */
 885 e70fd952 2024-03-22 stsp 			shut = 1;
 886 e70fd952 2024-03-22 stsp 			goto done;
 887 e70fd952 2024-03-22 stsp 		}
 888 e70fd952 2024-03-22 stsp 	}
 889 e70fd952 2024-03-22 stsp 
 890 e70fd952 2024-03-22 stsp 	for (;;) {
 891 e70fd952 2024-03-22 stsp 		const struct got_error *err = NULL;
 892 e70fd952 2024-03-22 stsp 		uint32_t client_id = 0;
 893 e70fd952 2024-03-22 stsp 		int do_disconnect = 0;
 894 e70fd952 2024-03-22 stsp 		int do_ref_updates = 0, do_ref_update = 0;
 895 e70fd952 2024-03-22 stsp 		int do_packfile_install = 0, do_notify = 0;
 896 e70fd952 2024-03-22 stsp 
 897 e70fd952 2024-03-22 stsp 		if ((n = imsg_get(ibuf, &imsg)) == -1)
 898 e70fd952 2024-03-22 stsp 			fatal("%s: imsg_get error", __func__);
 899 e70fd952 2024-03-22 stsp 		if (n == 0)	/* No more messages. */
 900 e70fd952 2024-03-22 stsp 			break;
 901 e70fd952 2024-03-22 stsp 
 902 e70fd952 2024-03-22 stsp 		switch (imsg.hdr.type) {
 903 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_ERROR:
 904 e70fd952 2024-03-22 stsp 			do_disconnect = 1;
 905 e70fd952 2024-03-22 stsp 			err = gotd_imsg_recv_error(&client_id, &imsg);
 906 e70fd952 2024-03-22 stsp 			break;
 907 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_PACKFILE_INSTALL:
 908 e70fd952 2024-03-22 stsp 			err = recv_packfile_install(&imsg);
 909 e70fd952 2024-03-22 stsp 			if (err == NULL)
 910 e70fd952 2024-03-22 stsp 				do_packfile_install = 1;
 911 e70fd952 2024-03-22 stsp 			break;
 912 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_REF_UPDATES_START:
 913 e70fd952 2024-03-22 stsp 			err = recv_ref_updates_start(&imsg);
 914 e70fd952 2024-03-22 stsp 			if (err == NULL)
 915 e70fd952 2024-03-22 stsp 				do_ref_updates = 1;
 916 e70fd952 2024-03-22 stsp 			break;
 917 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_REF_UPDATE:
 918 e70fd952 2024-03-22 stsp 			err = recv_ref_update(&imsg);
 919 e70fd952 2024-03-22 stsp 			if (err == NULL)
 920 e70fd952 2024-03-22 stsp 				do_ref_update = 1;
 921 e70fd952 2024-03-22 stsp 			break;
 922 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_NOTIFY:
 923 e70fd952 2024-03-22 stsp 			err = recv_notification_content(&imsg);
 924 e70fd952 2024-03-22 stsp 			if (err == NULL)
 925 e70fd952 2024-03-22 stsp 				do_notify = 1;
 926 e70fd952 2024-03-22 stsp 			break;
 927 e70fd952 2024-03-22 stsp 		default:
 928 e70fd952 2024-03-22 stsp 			log_debug("unexpected imsg %d", imsg.hdr.type);
 929 e70fd952 2024-03-22 stsp 			break;
 930 e70fd952 2024-03-22 stsp 		}
 931 e70fd952 2024-03-22 stsp 
 932 3bdb5066 2024-04-16 op 		if (do_disconnect || err) {
 933 e70fd952 2024-03-22 stsp 			if (err)
 934 e70fd952 2024-03-22 stsp 				disconnect_on_error(client, err);
 935 e70fd952 2024-03-22 stsp 			else
 936 e70fd952 2024-03-22 stsp 				disconnect(client);
 937 e70fd952 2024-03-22 stsp 		} else {
 938 e70fd952 2024-03-22 stsp 			struct gotd_session_notif *notif;
 939 e70fd952 2024-03-22 stsp 
 940 e70fd952 2024-03-22 stsp 			if (do_packfile_install)
 941 e70fd952 2024-03-22 stsp 				err = install_pack(client,
 942 e70fd952 2024-03-22 stsp 				    gotd_session.repo->path, &imsg);
 943 e70fd952 2024-03-22 stsp 			else if (do_ref_updates)
 944 e70fd952 2024-03-22 stsp 				err = begin_ref_updates(client, &imsg);
 945 e70fd952 2024-03-22 stsp 			else if (do_ref_update)
 946 e70fd952 2024-03-22 stsp 				err = update_ref(&shut, client,
 947 e70fd952 2024-03-22 stsp 				    gotd_session.repo->path, &imsg);
 948 e70fd952 2024-03-22 stsp 			else if (do_notify)
 949 e70fd952 2024-03-22 stsp 				err = forward_notification(client, &imsg);
 950 e70fd952 2024-03-22 stsp 			if (err)
 951 e70fd952 2024-03-22 stsp 				log_warnx("uid %d: %s", client->euid, err->msg);
 952 e70fd952 2024-03-22 stsp 
 953 e70fd952 2024-03-22 stsp 			notif = STAILQ_FIRST(&notifications);
 954 e70fd952 2024-03-22 stsp 			if (notif && do_notify) {
 955 e70fd952 2024-03-22 stsp 				/* Request content for next notification. */
 956 e70fd952 2024-03-22 stsp 				err = request_notification(notif);
 957 e70fd952 2024-03-22 stsp 				if (err) {
 958 e70fd952 2024-03-22 stsp 					log_warn("could not send notification: "
 959 e70fd952 2024-03-22 stsp 					    "%s", err->msg);
 960 e70fd952 2024-03-22 stsp 					shut = 1;
 961 e70fd952 2024-03-22 stsp 				}
 962 e70fd952 2024-03-22 stsp 			}
 963 e70fd952 2024-03-22 stsp 		}
 964 e70fd952 2024-03-22 stsp 		imsg_free(&imsg);
 965 e70fd952 2024-03-22 stsp 	}
 966 e70fd952 2024-03-22 stsp done:
 967 e70fd952 2024-03-22 stsp 	if (!shut) {
 968 e70fd952 2024-03-22 stsp 		gotd_imsg_event_add(iev);
 969 e70fd952 2024-03-22 stsp 	} else {
 970 e70fd952 2024-03-22 stsp 		/* This pipe is dead. Remove its event handler */
 971 e70fd952 2024-03-22 stsp 		event_del(&iev->ev);
 972 e70fd952 2024-03-22 stsp 		event_loopexit(NULL);
 973 e70fd952 2024-03-22 stsp 	}
 974 e70fd952 2024-03-22 stsp }
 975 e70fd952 2024-03-22 stsp 
 976 e70fd952 2024-03-22 stsp static const struct got_error *
 977 e70fd952 2024-03-22 stsp recv_capabilities(struct gotd_session_client *client, struct imsg *imsg)
 978 e70fd952 2024-03-22 stsp {
 979 e70fd952 2024-03-22 stsp 	struct gotd_imsg_capabilities icapas;
 980 e70fd952 2024-03-22 stsp 	size_t datalen;
 981 e70fd952 2024-03-22 stsp 
 982 e70fd952 2024-03-22 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 983 e70fd952 2024-03-22 stsp 	if (datalen != sizeof(icapas))
 984 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 985 e70fd952 2024-03-22 stsp 	memcpy(&icapas, imsg->data, sizeof(icapas));
 986 e70fd952 2024-03-22 stsp 
 987 e70fd952 2024-03-22 stsp 	client->ncapa_alloc = icapas.ncapabilities;
 988 e70fd952 2024-03-22 stsp 	client->capabilities = calloc(client->ncapa_alloc,
 989 e70fd952 2024-03-22 stsp 	    sizeof(*client->capabilities));
 990 e70fd952 2024-03-22 stsp 	if (client->capabilities == NULL) {
 991 e70fd952 2024-03-22 stsp 		client->ncapa_alloc = 0;
 992 e70fd952 2024-03-22 stsp 		return got_error_from_errno("calloc");
 993 e70fd952 2024-03-22 stsp 	}
 994 e70fd952 2024-03-22 stsp 
 995 e70fd952 2024-03-22 stsp 	log_debug("expecting %zu capabilities from uid %d",
 996 e70fd952 2024-03-22 stsp 	    client->ncapa_alloc, client->euid);
 997 e70fd952 2024-03-22 stsp 	return NULL;
 998 e70fd952 2024-03-22 stsp }
 999 e70fd952 2024-03-22 stsp 
1000 e70fd952 2024-03-22 stsp static const struct got_error *
1001 e70fd952 2024-03-22 stsp recv_capability(struct gotd_session_client *client, struct imsg *imsg)
1002 e70fd952 2024-03-22 stsp {
1003 e70fd952 2024-03-22 stsp 	struct gotd_imsg_capability icapa;
1004 e70fd952 2024-03-22 stsp 	struct gotd_client_capability *capa;
1005 e70fd952 2024-03-22 stsp 	size_t datalen;
1006 e70fd952 2024-03-22 stsp 	char *key, *value = NULL;
1007 e70fd952 2024-03-22 stsp 
1008 e70fd952 2024-03-22 stsp 	if (client->capabilities == NULL ||
1009 e70fd952 2024-03-22 stsp 	    client->ncapabilities >= client->ncapa_alloc) {
1010 e70fd952 2024-03-22 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
1011 e70fd952 2024-03-22 stsp 		    "unexpected capability received");
1012 e70fd952 2024-03-22 stsp 	}
1013 e70fd952 2024-03-22 stsp 
1014 e70fd952 2024-03-22 stsp 	memset(&icapa, 0, sizeof(icapa));
1015 e70fd952 2024-03-22 stsp 
1016 e70fd952 2024-03-22 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1017 e70fd952 2024-03-22 stsp 	if (datalen < sizeof(icapa))
1018 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1019 e70fd952 2024-03-22 stsp 	memcpy(&icapa, imsg->data, sizeof(icapa));
1020 e70fd952 2024-03-22 stsp 
1021 e70fd952 2024-03-22 stsp 	if (datalen != sizeof(icapa) + icapa.key_len + icapa.value_len)
1022 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1023 e70fd952 2024-03-22 stsp 
1024 e70fd952 2024-03-22 stsp 	key = strndup(imsg->data + sizeof(icapa), icapa.key_len);
1025 e70fd952 2024-03-22 stsp 	if (key == NULL)
1026 e70fd952 2024-03-22 stsp 		return got_error_from_errno("strndup");
1027 e70fd952 2024-03-22 stsp 	if (icapa.value_len > 0) {
1028 e70fd952 2024-03-22 stsp 		value = strndup(imsg->data + sizeof(icapa) + icapa.key_len,
1029 e70fd952 2024-03-22 stsp 		    icapa.value_len);
1030 e70fd952 2024-03-22 stsp 		if (value == NULL) {
1031 e70fd952 2024-03-22 stsp 			free(key);
1032 e70fd952 2024-03-22 stsp 			return got_error_from_errno("strndup");
1033 e70fd952 2024-03-22 stsp 		}
1034 e70fd952 2024-03-22 stsp 	}
1035 e70fd952 2024-03-22 stsp 
1036 e70fd952 2024-03-22 stsp 	capa = &client->capabilities[client->ncapabilities++];
1037 e70fd952 2024-03-22 stsp 	capa->key = key;
1038 e70fd952 2024-03-22 stsp 	capa->value = value;
1039 e70fd952 2024-03-22 stsp 
1040 e70fd952 2024-03-22 stsp 	if (value)
1041 e70fd952 2024-03-22 stsp 		log_debug("uid %d: capability %s=%s", client->euid, key, value);
1042 e70fd952 2024-03-22 stsp 	else
1043 e70fd952 2024-03-22 stsp 		log_debug("uid %d: capability %s", client->euid, key);
1044 e70fd952 2024-03-22 stsp 
1045 e70fd952 2024-03-22 stsp 	return NULL;
1046 e70fd952 2024-03-22 stsp }
1047 e70fd952 2024-03-22 stsp 
1048 e70fd952 2024-03-22 stsp static const struct got_error *
1049 e70fd952 2024-03-22 stsp forward_ref_update(struct gotd_session_client *client, struct imsg *imsg)
1050 e70fd952 2024-03-22 stsp {
1051 e70fd952 2024-03-22 stsp 	const struct got_error *err = NULL;
1052 e70fd952 2024-03-22 stsp 	struct gotd_imsg_ref_update ireq;
1053 e70fd952 2024-03-22 stsp 	struct gotd_imsg_ref_update *iref = NULL;
1054 e70fd952 2024-03-22 stsp 	size_t datalen;
1055 e70fd952 2024-03-22 stsp 
1056 e70fd952 2024-03-22 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1057 e70fd952 2024-03-22 stsp 	if (datalen < sizeof(ireq))
1058 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1059 e70fd952 2024-03-22 stsp 	memcpy(&ireq, imsg->data, sizeof(ireq));
1060 e70fd952 2024-03-22 stsp 	if (datalen != sizeof(ireq) + ireq.name_len)
1061 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1062 e70fd952 2024-03-22 stsp 
1063 e70fd952 2024-03-22 stsp 	iref = malloc(datalen);
1064 e70fd952 2024-03-22 stsp 	if (iref == NULL)
1065 e70fd952 2024-03-22 stsp 		return got_error_from_errno("malloc");
1066 e70fd952 2024-03-22 stsp 	memcpy(iref, imsg->data, datalen);
1067 e70fd952 2024-03-22 stsp 
1068 e70fd952 2024-03-22 stsp 	if (gotd_imsg_compose_event(&gotd_session.repo_child_iev,
1069 e70fd952 2024-03-22 stsp 	    GOTD_IMSG_REF_UPDATE, PROC_SESSION_WRITE, -1,
1070 e70fd952 2024-03-22 stsp 	    iref, datalen) == -1)
1071 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("imsg compose REF_UPDATE");
1072 e70fd952 2024-03-22 stsp 	free(iref);
1073 e70fd952 2024-03-22 stsp 	return err;
1074 e70fd952 2024-03-22 stsp }
1075 e70fd952 2024-03-22 stsp 
1076 e70fd952 2024-03-22 stsp static int
1077 e70fd952 2024-03-22 stsp client_has_capability(struct gotd_session_client *client, const char *capastr)
1078 e70fd952 2024-03-22 stsp {
1079 e70fd952 2024-03-22 stsp 	struct gotd_client_capability *capa;
1080 e70fd952 2024-03-22 stsp 	size_t i;
1081 e70fd952 2024-03-22 stsp 
1082 e70fd952 2024-03-22 stsp 	if (client->ncapabilities == 0)
1083 e70fd952 2024-03-22 stsp 		return 0;
1084 e70fd952 2024-03-22 stsp 
1085 e70fd952 2024-03-22 stsp 	for (i = 0; i < client->ncapabilities; i++) {
1086 e70fd952 2024-03-22 stsp 		capa = &client->capabilities[i];
1087 e70fd952 2024-03-22 stsp 		if (strcmp(capa->key, capastr) == 0)
1088 e70fd952 2024-03-22 stsp 			return 1;
1089 e70fd952 2024-03-22 stsp 	}
1090 e70fd952 2024-03-22 stsp 
1091 e70fd952 2024-03-22 stsp 	return 0;
1092 e70fd952 2024-03-22 stsp }
1093 e70fd952 2024-03-22 stsp 
1094 e70fd952 2024-03-22 stsp static const struct got_error *
1095 e70fd952 2024-03-22 stsp recv_packfile(struct gotd_session_client *client)
1096 e70fd952 2024-03-22 stsp {
1097 e70fd952 2024-03-22 stsp 	const struct got_error *err = NULL;
1098 e70fd952 2024-03-22 stsp 	struct gotd_imsg_recv_packfile ipack;
1099 e70fd952 2024-03-22 stsp 	char *basepath = NULL, *pack_path = NULL, *idx_path = NULL;
1100 e70fd952 2024-03-22 stsp 	int packfd = -1, idxfd = -1;
1101 e70fd952 2024-03-22 stsp 	int pipe[2] = { -1, -1 };
1102 e70fd952 2024-03-22 stsp 
1103 e70fd952 2024-03-22 stsp 	if (client->packfile_path) {
1104 e70fd952 2024-03-22 stsp 		return got_error_fmt(GOT_ERR_PRIVSEP_MSG,
1105 e70fd952 2024-03-22 stsp 		    "uid %d already has a pack file", client->euid);
1106 e70fd952 2024-03-22 stsp 	}
1107 e70fd952 2024-03-22 stsp 
1108 e70fd952 2024-03-22 stsp 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
1109 e70fd952 2024-03-22 stsp 		return got_error_from_errno("socketpair");
1110 e70fd952 2024-03-22 stsp 
1111 e70fd952 2024-03-22 stsp 	/* Send pack pipe end 0 to repo child process. */
1112 e70fd952 2024-03-22 stsp 	if (gotd_imsg_compose_event(&gotd_session.repo_child_iev,
1113 e70fd952 2024-03-22 stsp 	    GOTD_IMSG_PACKFILE_PIPE, PROC_SESSION_WRITE, pipe[0],
1114 e70fd952 2024-03-22 stsp 	        NULL, 0) == -1) {
1115 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
1116 e70fd952 2024-03-22 stsp 		pipe[0] = -1;
1117 e70fd952 2024-03-22 stsp 		goto done;
1118 e70fd952 2024-03-22 stsp 	}
1119 e70fd952 2024-03-22 stsp 	pipe[0] = -1;
1120 e70fd952 2024-03-22 stsp 
1121 e70fd952 2024-03-22 stsp 	/* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
1122 e70fd952 2024-03-22 stsp 	if (gotd_imsg_compose_event(&client->iev,
1123 e70fd952 2024-03-22 stsp 	    GOTD_IMSG_PACKFILE_PIPE, PROC_SESSION_WRITE, pipe[1],
1124 e70fd952 2024-03-22 stsp 	    NULL, 0) == -1)
1125 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
1126 e70fd952 2024-03-22 stsp 	pipe[1] = -1;
1127 e70fd952 2024-03-22 stsp 
1128 e70fd952 2024-03-22 stsp 	if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.pack",
1129 e70fd952 2024-03-22 stsp 	    got_repo_get_path(gotd_session.repo), GOT_OBJECTS_PACK_DIR,
1130 e70fd952 2024-03-22 stsp 	    client->euid) == -1) {
1131 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("asprintf");
1132 e70fd952 2024-03-22 stsp 		goto done;
1133 e70fd952 2024-03-22 stsp 	}
1134 e70fd952 2024-03-22 stsp 
1135 e70fd952 2024-03-22 stsp 	err = got_opentemp_named_fd(&pack_path, &packfd, basepath, "");
1136 e70fd952 2024-03-22 stsp 	if (err)
1137 e70fd952 2024-03-22 stsp 		goto done;
1138 e70fd952 2024-03-22 stsp 	if (fchmod(packfd, GOT_DEFAULT_PACK_MODE) == -1) {
1139 e70fd952 2024-03-22 stsp 		err = got_error_from_errno2("fchmod", pack_path);
1140 e70fd952 2024-03-22 stsp 		goto done;
1141 e70fd952 2024-03-22 stsp 	}
1142 e70fd952 2024-03-22 stsp 
1143 e70fd952 2024-03-22 stsp 	free(basepath);
1144 e70fd952 2024-03-22 stsp 	if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.idx",
1145 e70fd952 2024-03-22 stsp 	    got_repo_get_path(gotd_session.repo), GOT_OBJECTS_PACK_DIR,
1146 e70fd952 2024-03-22 stsp 	    client->euid) == -1) {
1147 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("asprintf");
1148 e70fd952 2024-03-22 stsp 		basepath = NULL;
1149 e70fd952 2024-03-22 stsp 		goto done;
1150 e70fd952 2024-03-22 stsp 	}
1151 e70fd952 2024-03-22 stsp 	err = got_opentemp_named_fd(&idx_path, &idxfd, basepath, "");
1152 e70fd952 2024-03-22 stsp 	if (err)
1153 e70fd952 2024-03-22 stsp 		goto done;
1154 e70fd952 2024-03-22 stsp 	if (fchmod(idxfd, GOT_DEFAULT_PACK_MODE) == -1) {
1155 e70fd952 2024-03-22 stsp 		err = got_error_from_errno2("fchmod", idx_path);
1156 e70fd952 2024-03-22 stsp 		goto done;
1157 e70fd952 2024-03-22 stsp 	}
1158 e70fd952 2024-03-22 stsp 
1159 e70fd952 2024-03-22 stsp 	if (gotd_imsg_compose_event(&gotd_session.repo_child_iev,
1160 e70fd952 2024-03-22 stsp 	    GOTD_IMSG_PACKIDX_FILE, PROC_SESSION_WRITE,
1161 e70fd952 2024-03-22 stsp 	    idxfd, NULL, 0) == -1) {
1162 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("imsg compose PACKIDX_FILE");
1163 e70fd952 2024-03-22 stsp 		idxfd = -1;
1164 e70fd952 2024-03-22 stsp 		goto done;
1165 e70fd952 2024-03-22 stsp 	}
1166 e70fd952 2024-03-22 stsp 	idxfd = -1;
1167 e70fd952 2024-03-22 stsp 
1168 e70fd952 2024-03-22 stsp 	memset(&ipack, 0, sizeof(ipack));
1169 e70fd952 2024-03-22 stsp 	if (client_has_capability(client, GOT_CAPA_REPORT_STATUS))
1170 e70fd952 2024-03-22 stsp 		ipack.report_status = 1;
1171 e70fd952 2024-03-22 stsp 
1172 e70fd952 2024-03-22 stsp 	if (gotd_imsg_compose_event(&gotd_session.repo_child_iev,
1173 e70fd952 2024-03-22 stsp 	    GOTD_IMSG_RECV_PACKFILE, PROC_SESSION_WRITE, packfd,
1174 e70fd952 2024-03-22 stsp 	    &ipack, sizeof(ipack)) == -1) {
1175 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("imsg compose RECV_PACKFILE");
1176 e70fd952 2024-03-22 stsp 		packfd = -1;
1177 e70fd952 2024-03-22 stsp 		goto done;
1178 e70fd952 2024-03-22 stsp 	}
1179 e70fd952 2024-03-22 stsp 	packfd = -1;
1180 e70fd952 2024-03-22 stsp 
1181 e70fd952 2024-03-22 stsp done:
1182 e70fd952 2024-03-22 stsp 	free(basepath);
1183 e70fd952 2024-03-22 stsp 	if (pipe[0] != -1 && close(pipe[0]) == -1 && err == NULL)
1184 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("close");
1185 e70fd952 2024-03-22 stsp 	if (pipe[1] != -1 && close(pipe[1]) == -1 && err == NULL)
1186 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("close");
1187 e70fd952 2024-03-22 stsp 	if (packfd != -1 && close(packfd) == -1 && err == NULL)
1188 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("close");
1189 e70fd952 2024-03-22 stsp 	if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
1190 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("close");
1191 e70fd952 2024-03-22 stsp 	if (err) {
1192 e70fd952 2024-03-22 stsp 		free(pack_path);
1193 e70fd952 2024-03-22 stsp 		free(idx_path);
1194 e70fd952 2024-03-22 stsp 	} else {
1195 e70fd952 2024-03-22 stsp 		client->packfile_path = pack_path;
1196 e70fd952 2024-03-22 stsp 		client->packidx_path = idx_path;
1197 e70fd952 2024-03-22 stsp 	}
1198 e70fd952 2024-03-22 stsp 	return err;
1199 e70fd952 2024-03-22 stsp }
1200 e70fd952 2024-03-22 stsp 
1201 e70fd952 2024-03-22 stsp static void
1202 e70fd952 2024-03-22 stsp session_dispatch_client(int fd, short events, void *arg)
1203 e70fd952 2024-03-22 stsp {
1204 e70fd952 2024-03-22 stsp 	struct gotd_imsgev *iev = arg;
1205 e70fd952 2024-03-22 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
1206 e70fd952 2024-03-22 stsp 	struct gotd_session_client *client = &gotd_session_client;
1207 e70fd952 2024-03-22 stsp 	const struct got_error *err = NULL;
1208 e70fd952 2024-03-22 stsp 	struct imsg imsg;
1209 e70fd952 2024-03-22 stsp 	ssize_t n;
1210 e70fd952 2024-03-22 stsp 
1211 e70fd952 2024-03-22 stsp 	if (events & EV_WRITE) {
1212 e70fd952 2024-03-22 stsp 		while (ibuf->w.queued) {
1213 e70fd952 2024-03-22 stsp 			n = msgbuf_write(&ibuf->w);
1214 e70fd952 2024-03-22 stsp 			if (n == -1 && errno == EPIPE) {
1215 e70fd952 2024-03-22 stsp 				/*
1216 e70fd952 2024-03-22 stsp 				 * The client has closed its socket.
1217 e70fd952 2024-03-22 stsp 				 * This can happen when Git clients are
1218 e70fd952 2024-03-22 stsp 				 * done sending pack file data.
1219 e70fd952 2024-03-22 stsp 				 */
1220 e70fd952 2024-03-22 stsp 				msgbuf_clear(&ibuf->w);
1221 e70fd952 2024-03-22 stsp 				continue;
1222 e70fd952 2024-03-22 stsp 			} else if (n == -1 && errno != EAGAIN) {
1223 e70fd952 2024-03-22 stsp 				err = got_error_from_errno("imsg_flush");
1224 e70fd952 2024-03-22 stsp 				disconnect_on_error(client, err);
1225 e70fd952 2024-03-22 stsp 				return;
1226 e70fd952 2024-03-22 stsp 			}
1227 e70fd952 2024-03-22 stsp 			if (n == 0) {
1228 e70fd952 2024-03-22 stsp 				/* Connection closed. */
1229 e70fd952 2024-03-22 stsp 				err = got_error(GOT_ERR_EOF);
1230 e70fd952 2024-03-22 stsp 				disconnect_on_error(client, err);
1231 e70fd952 2024-03-22 stsp 				return;
1232 e70fd952 2024-03-22 stsp 			}
1233 e70fd952 2024-03-22 stsp 		}
1234 e70fd952 2024-03-22 stsp 
1235 e70fd952 2024-03-22 stsp 		if (client->flush_disconnect) {
1236 e70fd952 2024-03-22 stsp 			disconnect(client);
1237 e70fd952 2024-03-22 stsp 			return;
1238 e70fd952 2024-03-22 stsp 		}
1239 e70fd952 2024-03-22 stsp 	}
1240 e70fd952 2024-03-22 stsp 
1241 e70fd952 2024-03-22 stsp 	if ((events & EV_READ) == 0)
1242 e70fd952 2024-03-22 stsp 		return;
1243 e70fd952 2024-03-22 stsp 
1244 e70fd952 2024-03-22 stsp 	memset(&imsg, 0, sizeof(imsg));
1245 e70fd952 2024-03-22 stsp 
1246 e70fd952 2024-03-22 stsp 	while (err == NULL) {
1247 e70fd952 2024-03-22 stsp 		err = gotd_imsg_recv(&imsg, ibuf, 0);
1248 e70fd952 2024-03-22 stsp 		if (err) {
1249 e70fd952 2024-03-22 stsp 			if (err->code == GOT_ERR_PRIVSEP_READ)
1250 e70fd952 2024-03-22 stsp 				err = NULL;
1251 e70fd952 2024-03-22 stsp 			else if (err->code == GOT_ERR_EOF &&
1252 e70fd952 2024-03-22 stsp 			    gotd_session.state ==
1253 e70fd952 2024-03-22 stsp 			    GOTD_STATE_EXPECT_CAPABILITIES) {
1254 e70fd952 2024-03-22 stsp 				/*
1255 e70fd952 2024-03-22 stsp 				 * The client has closed its socket before
1256 e70fd952 2024-03-22 stsp 				 * sending its capability announcement.
1257 e70fd952 2024-03-22 stsp 				 * This can happen when Git clients have
1258 e70fd952 2024-03-22 stsp 				 * no ref-updates to send.
1259 e70fd952 2024-03-22 stsp 				 */
1260 e70fd952 2024-03-22 stsp 				disconnect_on_error(client, err);
1261 e70fd952 2024-03-22 stsp 				return;
1262 e70fd952 2024-03-22 stsp 			}
1263 e70fd952 2024-03-22 stsp 			break;
1264 e70fd952 2024-03-22 stsp 		}
1265 e70fd952 2024-03-22 stsp 
1266 e70fd952 2024-03-22 stsp 		evtimer_del(&client->tmo);
1267 e70fd952 2024-03-22 stsp 
1268 e70fd952 2024-03-22 stsp 		switch (imsg.hdr.type) {
1269 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_CAPABILITIES:
1270 e70fd952 2024-03-22 stsp 			if (gotd_session.state !=
1271 e70fd952 2024-03-22 stsp 			    GOTD_STATE_EXPECT_CAPABILITIES) {
1272 e70fd952 2024-03-22 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1273 e70fd952 2024-03-22 stsp 				    "unexpected capabilities received");
1274 e70fd952 2024-03-22 stsp 				break;
1275 e70fd952 2024-03-22 stsp 			}
1276 e70fd952 2024-03-22 stsp 			log_debug("receiving capabilities from uid %d",
1277 e70fd952 2024-03-22 stsp 			    client->euid);
1278 e70fd952 2024-03-22 stsp 			err = recv_capabilities(client, &imsg);
1279 e70fd952 2024-03-22 stsp 			break;
1280 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_CAPABILITY:
1281 e70fd952 2024-03-22 stsp 			if (gotd_session.state != GOTD_STATE_EXPECT_CAPABILITIES) {
1282 e70fd952 2024-03-22 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1283 e70fd952 2024-03-22 stsp 				    "unexpected capability received");
1284 e70fd952 2024-03-22 stsp 				break;
1285 e70fd952 2024-03-22 stsp 			}
1286 e70fd952 2024-03-22 stsp 			err = recv_capability(client, &imsg);
1287 e70fd952 2024-03-22 stsp 			if (err || client->ncapabilities < client->ncapa_alloc)
1288 e70fd952 2024-03-22 stsp 				break;
1289 e70fd952 2024-03-22 stsp 			gotd_session.state = GOTD_STATE_EXPECT_REF_UPDATE;
1290 e70fd952 2024-03-22 stsp 			client->accept_flush_pkt = 1;
1291 e70fd952 2024-03-22 stsp 			log_debug("uid %d: expecting ref-update-lines",
1292 e70fd952 2024-03-22 stsp 			    client->euid);
1293 e70fd952 2024-03-22 stsp 			break;
1294 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_REF_UPDATE:
1295 e70fd952 2024-03-22 stsp 			if (gotd_session.state != GOTD_STATE_EXPECT_REF_UPDATE &&
1296 e70fd952 2024-03-22 stsp 			    gotd_session.state !=
1297 e70fd952 2024-03-22 stsp 			    GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1298 e70fd952 2024-03-22 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1299 e70fd952 2024-03-22 stsp 				    "unexpected ref-update-line received");
1300 e70fd952 2024-03-22 stsp 				break;
1301 e70fd952 2024-03-22 stsp 			}
1302 e70fd952 2024-03-22 stsp 			log_debug("received ref-update-line from uid %d",
1303 e70fd952 2024-03-22 stsp 			    client->euid);
1304 e70fd952 2024-03-22 stsp 			err = forward_ref_update(client, &imsg);
1305 e70fd952 2024-03-22 stsp 			if (err)
1306 e70fd952 2024-03-22 stsp 				break;
1307 e70fd952 2024-03-22 stsp 			gotd_session.state = GOTD_STATE_EXPECT_MORE_REF_UPDATES;
1308 e70fd952 2024-03-22 stsp 			client->accept_flush_pkt = 1;
1309 e70fd952 2024-03-22 stsp 			break;
1310 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_FLUSH:
1311 e70fd952 2024-03-22 stsp 			if (gotd_session.state !=
1312 e70fd952 2024-03-22 stsp 			    GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1313 e70fd952 2024-03-22 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1314 e70fd952 2024-03-22 stsp 				    "unexpected flush-pkt received");
1315 e70fd952 2024-03-22 stsp 				break;
1316 e70fd952 2024-03-22 stsp 			}
1317 e70fd952 2024-03-22 stsp 			if (!client->accept_flush_pkt) {
1318 e70fd952 2024-03-22 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1319 e70fd952 2024-03-22 stsp 				    "unexpected flush-pkt received");
1320 e70fd952 2024-03-22 stsp 				break;
1321 e70fd952 2024-03-22 stsp 			}
1322 e70fd952 2024-03-22 stsp 
1323 e70fd952 2024-03-22 stsp 			/*
1324 e70fd952 2024-03-22 stsp 			 * Accept just one flush packet at a time.
1325 e70fd952 2024-03-22 stsp 			 * Future client state transitions will set this flag
1326 e70fd952 2024-03-22 stsp 			 * again if another flush packet is expected.
1327 e70fd952 2024-03-22 stsp 			 */
1328 e70fd952 2024-03-22 stsp 			client->accept_flush_pkt = 0;
1329 e70fd952 2024-03-22 stsp 
1330 e70fd952 2024-03-22 stsp 			log_debug("received flush-pkt from uid %d",
1331 e70fd952 2024-03-22 stsp 			    client->euid);
1332 e70fd952 2024-03-22 stsp 			if (gotd_session.state ==
1333 e70fd952 2024-03-22 stsp 			    GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1334 e70fd952 2024-03-22 stsp 				gotd_session.state = GOTD_STATE_EXPECT_PACKFILE;
1335 e70fd952 2024-03-22 stsp 				log_debug("uid %d: expecting packfile",
1336 e70fd952 2024-03-22 stsp 				    client->euid);
1337 e70fd952 2024-03-22 stsp 				err = recv_packfile(client);
1338 e70fd952 2024-03-22 stsp 			} else {
1339 e70fd952 2024-03-22 stsp 				/* should not happen, see above */
1340 e70fd952 2024-03-22 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1341 e70fd952 2024-03-22 stsp 				    "unexpected client state");
1342 e70fd952 2024-03-22 stsp 				break;
1343 e70fd952 2024-03-22 stsp 			}
1344 e70fd952 2024-03-22 stsp 			break;
1345 e70fd952 2024-03-22 stsp 		default:
1346 e70fd952 2024-03-22 stsp 			log_debug("unexpected imsg %d", imsg.hdr.type);
1347 e70fd952 2024-03-22 stsp 			err = got_error(GOT_ERR_PRIVSEP_MSG);
1348 e70fd952 2024-03-22 stsp 			break;
1349 e70fd952 2024-03-22 stsp 		}
1350 e70fd952 2024-03-22 stsp 
1351 e70fd952 2024-03-22 stsp 		imsg_free(&imsg);
1352 e70fd952 2024-03-22 stsp 	}
1353 e70fd952 2024-03-22 stsp 
1354 e70fd952 2024-03-22 stsp 	if (err) {
1355 e70fd952 2024-03-22 stsp 		if (err->code != GOT_ERR_EOF ||
1356 c3cc85a3 2024-04-30 stsp 		    (gotd_session.state != GOTD_STATE_EXPECT_PACKFILE &&
1357 c3cc85a3 2024-04-30 stsp 		    gotd_session.state != GOTD_STATE_NOTIFY))
1358 e70fd952 2024-03-22 stsp 			disconnect_on_error(client, err);
1359 e70fd952 2024-03-22 stsp 	} else {
1360 e70fd952 2024-03-22 stsp 		gotd_imsg_event_add(iev);
1361 e70fd952 2024-03-22 stsp 		evtimer_add(&client->tmo, &gotd_session.request_timeout);
1362 e70fd952 2024-03-22 stsp 	}
1363 e70fd952 2024-03-22 stsp }
1364 e70fd952 2024-03-22 stsp 
1365 e70fd952 2024-03-22 stsp static const struct got_error *
1366 e70fd952 2024-03-22 stsp list_refs_request(void)
1367 e70fd952 2024-03-22 stsp {
1368 e70fd952 2024-03-22 stsp 	static const struct got_error *err;
1369 e70fd952 2024-03-22 stsp 	struct gotd_session_client *client = &gotd_session_client;
1370 e70fd952 2024-03-22 stsp 	struct gotd_imsgev *iev = &gotd_session.repo_child_iev;
1371 e70fd952 2024-03-22 stsp 	int fd;
1372 e70fd952 2024-03-22 stsp 
1373 e70fd952 2024-03-22 stsp 	if (gotd_session.state != GOTD_STATE_EXPECT_LIST_REFS)
1374 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1375 e70fd952 2024-03-22 stsp 
1376 e70fd952 2024-03-22 stsp 	fd = dup(client->fd);
1377 e70fd952 2024-03-22 stsp 	if (fd == -1)
1378 e70fd952 2024-03-22 stsp 		return got_error_from_errno("dup");
1379 e70fd952 2024-03-22 stsp 
1380 e70fd952 2024-03-22 stsp 	if (gotd_imsg_compose_event(iev, GOTD_IMSG_LIST_REFS_INTERNAL,
1381 e70fd952 2024-03-22 stsp 	    PROC_SESSION_WRITE, fd, NULL, 0) == -1) {
1382 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("imsg compose LIST_REFS_INTERNAL");
1383 e70fd952 2024-03-22 stsp 		close(fd);
1384 e70fd952 2024-03-22 stsp 		return err;
1385 e70fd952 2024-03-22 stsp 	}
1386 e70fd952 2024-03-22 stsp 
1387 e70fd952 2024-03-22 stsp 	gotd_session.state = GOTD_STATE_EXPECT_CAPABILITIES;
1388 e70fd952 2024-03-22 stsp 	log_debug("uid %d: expecting capabilities", client->euid);
1389 e70fd952 2024-03-22 stsp 	return NULL;
1390 e70fd952 2024-03-22 stsp }
1391 e70fd952 2024-03-22 stsp 
1392 e70fd952 2024-03-22 stsp static const struct got_error *
1393 e70fd952 2024-03-22 stsp recv_connect(struct imsg *imsg)
1394 e70fd952 2024-03-22 stsp {
1395 e70fd952 2024-03-22 stsp 	struct gotd_session_client *client = &gotd_session_client;
1396 e70fd952 2024-03-22 stsp 	struct gotd_imsg_connect iconnect;
1397 e70fd952 2024-03-22 stsp 	size_t datalen;
1398 e70fd952 2024-03-22 stsp 
1399 e70fd952 2024-03-22 stsp 	if (gotd_session.state != GOTD_STATE_EXPECT_LIST_REFS)
1400 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1401 e70fd952 2024-03-22 stsp 
1402 e70fd952 2024-03-22 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1403 e70fd952 2024-03-22 stsp 	if (datalen < sizeof(iconnect))
1404 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1405 e70fd952 2024-03-22 stsp 	memcpy(&iconnect, imsg->data, sizeof(iconnect));
1406 e70fd952 2024-03-22 stsp 	if (iconnect.username_len == 0 ||
1407 e70fd952 2024-03-22 stsp 	    datalen != sizeof(iconnect) + iconnect.username_len)
1408 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1409 e70fd952 2024-03-22 stsp 
1410 e70fd952 2024-03-22 stsp 	client->euid = iconnect.euid;
1411 e70fd952 2024-03-22 stsp 	client->egid = iconnect.egid;
1412 e70fd952 2024-03-22 stsp 	client->fd = imsg_get_fd(imsg);
1413 e70fd952 2024-03-22 stsp 	if (client->fd == -1)
1414 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
1415 e70fd952 2024-03-22 stsp 
1416 e70fd952 2024-03-22 stsp 	client->username = strndup(imsg->data + sizeof(iconnect),
1417 e70fd952 2024-03-22 stsp 	    iconnect.username_len);
1418 e70fd952 2024-03-22 stsp 	if (client->username == NULL)
1419 e70fd952 2024-03-22 stsp 		return got_error_from_errno("strndup");
1420 e70fd952 2024-03-22 stsp 
1421 e70fd952 2024-03-22 stsp 	imsg_init(&client->iev.ibuf, client->fd);
1422 e70fd952 2024-03-22 stsp 	client->iev.handler = session_dispatch_client;
1423 e70fd952 2024-03-22 stsp 	client->iev.events = EV_READ;
1424 e70fd952 2024-03-22 stsp 	client->iev.handler_arg = NULL;
1425 e70fd952 2024-03-22 stsp 	event_set(&client->iev.ev, client->iev.ibuf.fd, EV_READ,
1426 e70fd952 2024-03-22 stsp 	    session_dispatch_client, &client->iev);
1427 e70fd952 2024-03-22 stsp 	gotd_imsg_event_add(&client->iev);
1428 e70fd952 2024-03-22 stsp 	evtimer_set(&client->tmo, gotd_request_timeout, client);
1429 caa6cf11 2024-04-30 stsp 	evtimer_add(&client->tmo, &gotd_session.request_timeout);
1430 e70fd952 2024-03-22 stsp 
1431 e70fd952 2024-03-22 stsp 	return NULL;
1432 e70fd952 2024-03-22 stsp }
1433 e70fd952 2024-03-22 stsp 
1434 e70fd952 2024-03-22 stsp static void
1435 e70fd952 2024-03-22 stsp session_dispatch_notifier(int fd, short event, void *arg)
1436 e70fd952 2024-03-22 stsp {
1437 e70fd952 2024-03-22 stsp 	const struct got_error *err;
1438 e70fd952 2024-03-22 stsp 	struct gotd_session_client *client = &gotd_session_client;
1439 e70fd952 2024-03-22 stsp 	struct gotd_imsgev *iev = arg;
1440 e70fd952 2024-03-22 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
1441 e70fd952 2024-03-22 stsp 	ssize_t n;
1442 e70fd952 2024-03-22 stsp 	int shut = 0;
1443 e70fd952 2024-03-22 stsp 	struct imsg imsg;
1444 e70fd952 2024-03-22 stsp 	struct gotd_session_notif *notif;
1445 e70fd952 2024-03-22 stsp 
1446 e70fd952 2024-03-22 stsp 	if (event & EV_READ) {
1447 e70fd952 2024-03-22 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1448 e70fd952 2024-03-22 stsp 			fatal("imsg_read error");
1449 e70fd952 2024-03-22 stsp 		if (n == 0) {
1450 e70fd952 2024-03-22 stsp 			/* Connection closed. */
1451 e70fd952 2024-03-22 stsp 			shut = 1;
1452 e70fd952 2024-03-22 stsp 			goto done;
1453 e70fd952 2024-03-22 stsp 		}
1454 e70fd952 2024-03-22 stsp 	}
1455 e70fd952 2024-03-22 stsp 
1456 e70fd952 2024-03-22 stsp 	if (event & EV_WRITE) {
1457 e70fd952 2024-03-22 stsp 		n = msgbuf_write(&ibuf->w);
1458 e70fd952 2024-03-22 stsp 		if (n == -1 && errno != EAGAIN)
1459 e70fd952 2024-03-22 stsp 			fatal("msgbuf_write");
1460 e70fd952 2024-03-22 stsp 		if (n == 0) {
1461 e70fd952 2024-03-22 stsp 			/* Connection closed. */
1462 e70fd952 2024-03-22 stsp 			shut = 1;
1463 e70fd952 2024-03-22 stsp 			goto done;
1464 e70fd952 2024-03-22 stsp 		}
1465 e70fd952 2024-03-22 stsp 	}
1466 e70fd952 2024-03-22 stsp 
1467 e70fd952 2024-03-22 stsp 	for (;;) {
1468 e70fd952 2024-03-22 stsp 		if ((n = imsg_get(ibuf, &imsg)) == -1)
1469 e70fd952 2024-03-22 stsp 			fatal("%s: imsg_get error", __func__);
1470 e70fd952 2024-03-22 stsp 		if (n == 0)	/* No more messages. */
1471 e70fd952 2024-03-22 stsp 			break;
1472 e70fd952 2024-03-22 stsp 
1473 e70fd952 2024-03-22 stsp 		switch (imsg.hdr.type) {
1474 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_NOTIFICATION_SENT:
1475 e70fd952 2024-03-22 stsp 			if (gotd_session.state != GOTD_STATE_NOTIFY) {
1476 e70fd952 2024-03-22 stsp 				log_warn("unexpected imsg %d", imsg.hdr.type);
1477 e70fd952 2024-03-22 stsp 				break;
1478 e70fd952 2024-03-22 stsp 			}
1479 e70fd952 2024-03-22 stsp 			notif = STAILQ_FIRST(&notifications);
1480 e70fd952 2024-03-22 stsp 			if (notif == NULL) {
1481 e70fd952 2024-03-22 stsp 				disconnect(client);
1482 e70fd952 2024-03-22 stsp 				break; /* NOTREACHED */
1483 e70fd952 2024-03-22 stsp 			}
1484 e70fd952 2024-03-22 stsp 			/* Request content for the next notification. */
1485 e70fd952 2024-03-22 stsp 			err = request_notification(notif);
1486 e70fd952 2024-03-22 stsp 			if (err) {
1487 e70fd952 2024-03-22 stsp 				log_warn("could not send notification: %s",
1488 e70fd952 2024-03-22 stsp 				    err->msg);
1489 e70fd952 2024-03-22 stsp 				disconnect(client);
1490 e70fd952 2024-03-22 stsp 			}
1491 e70fd952 2024-03-22 stsp 			break;
1492 e70fd952 2024-03-22 stsp 		default:
1493 e70fd952 2024-03-22 stsp 			log_debug("unexpected imsg %d", imsg.hdr.type);
1494 e70fd952 2024-03-22 stsp 			break;
1495 e70fd952 2024-03-22 stsp 		}
1496 e70fd952 2024-03-22 stsp 
1497 e70fd952 2024-03-22 stsp 		imsg_free(&imsg);
1498 e70fd952 2024-03-22 stsp 	}
1499 e70fd952 2024-03-22 stsp done:
1500 e70fd952 2024-03-22 stsp 	if (!shut) {
1501 e70fd952 2024-03-22 stsp 		gotd_imsg_event_add(iev);
1502 e70fd952 2024-03-22 stsp 	} else {
1503 e70fd952 2024-03-22 stsp 		/* This pipe is dead. Remove its event handler */
1504 e70fd952 2024-03-22 stsp 		event_del(&iev->ev);
1505 e70fd952 2024-03-22 stsp 		imsg_clear(&iev->ibuf);
1506 e70fd952 2024-03-22 stsp 		imsg_init(&iev->ibuf, -1);
1507 e70fd952 2024-03-22 stsp 	}
1508 e70fd952 2024-03-22 stsp }
1509 e70fd952 2024-03-22 stsp 
1510 e70fd952 2024-03-22 stsp static const struct got_error *
1511 e70fd952 2024-03-22 stsp recv_notifier(struct imsg *imsg)
1512 e70fd952 2024-03-22 stsp {
1513 e70fd952 2024-03-22 stsp 	struct gotd_imsgev *iev = &gotd_session.notifier_iev;
1514 e70fd952 2024-03-22 stsp 	struct gotd_session_client *client = &gotd_session_client;
1515 e70fd952 2024-03-22 stsp 	size_t datalen;
1516 e70fd952 2024-03-22 stsp 	int fd;
1517 e70fd952 2024-03-22 stsp 
1518 e70fd952 2024-03-22 stsp 	if (gotd_session.state != GOTD_STATE_EXPECT_LIST_REFS)
1519 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1520 e70fd952 2024-03-22 stsp 
1521 e70fd952 2024-03-22 stsp 	/* We should already have received a pipe to the listener. */
1522 e70fd952 2024-03-22 stsp 	if (client->fd == -1)
1523 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1524 e70fd952 2024-03-22 stsp 
1525 e70fd952 2024-03-22 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1526 e70fd952 2024-03-22 stsp 	if (datalen != 0)
1527 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1528 e70fd952 2024-03-22 stsp 
1529 e70fd952 2024-03-22 stsp 	fd = imsg_get_fd(imsg);
1530 e70fd952 2024-03-22 stsp 	if (fd == -1)
1531 e70fd952 2024-03-22 stsp 		return NULL; /* notifications unused */
1532 e70fd952 2024-03-22 stsp 
1533 e70fd952 2024-03-22 stsp 	imsg_init(&iev->ibuf, fd);
1534 e70fd952 2024-03-22 stsp 	iev->handler = session_dispatch_notifier;
1535 e70fd952 2024-03-22 stsp 	iev->events = EV_READ;
1536 e70fd952 2024-03-22 stsp 	iev->handler_arg = NULL;
1537 e70fd952 2024-03-22 stsp 	event_set(&iev->ev, iev->ibuf.fd, EV_READ,
1538 e70fd952 2024-03-22 stsp 	    session_dispatch_notifier, iev);
1539 e70fd952 2024-03-22 stsp 	gotd_imsg_event_add(iev);
1540 e70fd952 2024-03-22 stsp 
1541 e70fd952 2024-03-22 stsp 	return NULL;
1542 e70fd952 2024-03-22 stsp }
1543 e70fd952 2024-03-22 stsp 
1544 e70fd952 2024-03-22 stsp static const struct got_error *
1545 e70fd952 2024-03-22 stsp recv_repo_child(struct imsg *imsg)
1546 e70fd952 2024-03-22 stsp {
1547 e70fd952 2024-03-22 stsp 	struct gotd_imsg_connect_repo_child ichild;
1548 e70fd952 2024-03-22 stsp 	struct gotd_session_client *client = &gotd_session_client;
1549 e70fd952 2024-03-22 stsp 	size_t datalen;
1550 e70fd952 2024-03-22 stsp 	int fd;
1551 e70fd952 2024-03-22 stsp 
1552 e70fd952 2024-03-22 stsp 	if (gotd_session.state != GOTD_STATE_EXPECT_LIST_REFS)
1553 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1554 e70fd952 2024-03-22 stsp 
1555 e70fd952 2024-03-22 stsp 	/* We should already have received a pipe to the listener. */
1556 e70fd952 2024-03-22 stsp 	if (client->fd == -1)
1557 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1558 e70fd952 2024-03-22 stsp 
1559 e70fd952 2024-03-22 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1560 e70fd952 2024-03-22 stsp 	if (datalen != sizeof(ichild))
1561 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1562 e70fd952 2024-03-22 stsp 
1563 e70fd952 2024-03-22 stsp 	memcpy(&ichild, imsg->data, sizeof(ichild));
1564 e70fd952 2024-03-22 stsp 
1565 e70fd952 2024-03-22 stsp 	if (ichild.proc_id != PROC_REPO_WRITE)
1566 e70fd952 2024-03-22 stsp 		return got_error_msg(GOT_ERR_PRIVSEP_MSG,
1567 e70fd952 2024-03-22 stsp 		    "bad child process type");
1568 e70fd952 2024-03-22 stsp 
1569 e70fd952 2024-03-22 stsp 	fd = imsg_get_fd(imsg);
1570 e70fd952 2024-03-22 stsp 	if (fd == -1)
1571 e70fd952 2024-03-22 stsp 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
1572 e70fd952 2024-03-22 stsp 
1573 e70fd952 2024-03-22 stsp 	imsg_init(&gotd_session.repo_child_iev.ibuf, fd);
1574 e70fd952 2024-03-22 stsp 	gotd_session.repo_child_iev.handler = session_dispatch_repo_child;
1575 e70fd952 2024-03-22 stsp 	gotd_session.repo_child_iev.events = EV_READ;
1576 e70fd952 2024-03-22 stsp 	gotd_session.repo_child_iev.handler_arg = NULL;
1577 e70fd952 2024-03-22 stsp 	event_set(&gotd_session.repo_child_iev.ev,
1578 e70fd952 2024-03-22 stsp 	    gotd_session.repo_child_iev.ibuf.fd, EV_READ,
1579 e70fd952 2024-03-22 stsp 	    session_dispatch_repo_child, &gotd_session.repo_child_iev);
1580 e70fd952 2024-03-22 stsp 	gotd_imsg_event_add(&gotd_session.repo_child_iev);
1581 e70fd952 2024-03-22 stsp 
1582 e70fd952 2024-03-22 stsp 	/* The "recvfd" pledge promise is no longer needed. */
1583 e70fd952 2024-03-22 stsp 	if (pledge("stdio rpath wpath cpath sendfd fattr flock", NULL) == -1)
1584 e70fd952 2024-03-22 stsp 		fatal("pledge");
1585 e70fd952 2024-03-22 stsp 
1586 e70fd952 2024-03-22 stsp 	return NULL;
1587 e70fd952 2024-03-22 stsp }
1588 e70fd952 2024-03-22 stsp 
1589 e70fd952 2024-03-22 stsp static void
1590 e70fd952 2024-03-22 stsp session_dispatch(int fd, short event, void *arg)
1591 e70fd952 2024-03-22 stsp {
1592 e70fd952 2024-03-22 stsp 	struct gotd_imsgev *iev = arg;
1593 e70fd952 2024-03-22 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
1594 e70fd952 2024-03-22 stsp 	struct gotd_session_client *client = &gotd_session_client;
1595 e70fd952 2024-03-22 stsp 	ssize_t n;
1596 e70fd952 2024-03-22 stsp 	int shut = 0;
1597 e70fd952 2024-03-22 stsp 	struct imsg imsg;
1598 e70fd952 2024-03-22 stsp 
1599 e70fd952 2024-03-22 stsp 	if (event & EV_READ) {
1600 e70fd952 2024-03-22 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1601 e70fd952 2024-03-22 stsp 			fatal("imsg_read error");
1602 e70fd952 2024-03-22 stsp 		if (n == 0) {
1603 e70fd952 2024-03-22 stsp 			/* Connection closed. */
1604 e70fd952 2024-03-22 stsp 			shut = 1;
1605 e70fd952 2024-03-22 stsp 			goto done;
1606 e70fd952 2024-03-22 stsp 		}
1607 e70fd952 2024-03-22 stsp 	}
1608 e70fd952 2024-03-22 stsp 
1609 e70fd952 2024-03-22 stsp 	if (event & EV_WRITE) {
1610 e70fd952 2024-03-22 stsp 		n = msgbuf_write(&ibuf->w);
1611 e70fd952 2024-03-22 stsp 		if (n == -1 && errno != EAGAIN)
1612 e70fd952 2024-03-22 stsp 			fatal("msgbuf_write");
1613 e70fd952 2024-03-22 stsp 		if (n == 0) {
1614 e70fd952 2024-03-22 stsp 			/* Connection closed. */
1615 e70fd952 2024-03-22 stsp 			shut = 1;
1616 e70fd952 2024-03-22 stsp 			goto done;
1617 e70fd952 2024-03-22 stsp 		}
1618 e70fd952 2024-03-22 stsp 	}
1619 e70fd952 2024-03-22 stsp 
1620 e70fd952 2024-03-22 stsp 	for (;;) {
1621 e70fd952 2024-03-22 stsp 		const struct got_error *err = NULL;
1622 e70fd952 2024-03-22 stsp 		uint32_t client_id = 0;
1623 e70fd952 2024-03-22 stsp 		int do_disconnect = 0, do_list_refs = 0;
1624 e70fd952 2024-03-22 stsp 
1625 e70fd952 2024-03-22 stsp 		if ((n = imsg_get(ibuf, &imsg)) == -1)
1626 e70fd952 2024-03-22 stsp 			fatal("%s: imsg_get error", __func__);
1627 e70fd952 2024-03-22 stsp 		if (n == 0)	/* No more messages. */
1628 e70fd952 2024-03-22 stsp 			break;
1629 e70fd952 2024-03-22 stsp 
1630 e70fd952 2024-03-22 stsp 		switch (imsg.hdr.type) {
1631 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_ERROR:
1632 e70fd952 2024-03-22 stsp 			do_disconnect = 1;
1633 e70fd952 2024-03-22 stsp 			err = gotd_imsg_recv_error(&client_id, &imsg);
1634 e70fd952 2024-03-22 stsp 			break;
1635 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_CONNECT:
1636 e70fd952 2024-03-22 stsp 			err = recv_connect(&imsg);
1637 e70fd952 2024-03-22 stsp 			break;
1638 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_DISCONNECT:
1639 e70fd952 2024-03-22 stsp 			do_disconnect = 1;
1640 e70fd952 2024-03-22 stsp 			break;
1641 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_CONNECT_NOTIFIER:
1642 e70fd952 2024-03-22 stsp 			err = recv_notifier(&imsg);
1643 e70fd952 2024-03-22 stsp 			break;
1644 e70fd952 2024-03-22 stsp 		case GOTD_IMSG_CONNECT_REPO_CHILD:
1645 e70fd952 2024-03-22 stsp 			err = recv_repo_child(&imsg);
1646 e70fd952 2024-03-22 stsp 			if (err)
1647 e70fd952 2024-03-22 stsp 				break;
1648 e70fd952 2024-03-22 stsp 			do_list_refs = 1;
1649 e70fd952 2024-03-22 stsp 			break;
1650 e70fd952 2024-03-22 stsp 		default:
1651 e70fd952 2024-03-22 stsp 			log_debug("unexpected imsg %d", imsg.hdr.type);
1652 e70fd952 2024-03-22 stsp 			break;
1653 e70fd952 2024-03-22 stsp 		}
1654 e70fd952 2024-03-22 stsp 		imsg_free(&imsg);
1655 e70fd952 2024-03-22 stsp 
1656 e70fd952 2024-03-22 stsp 		if (do_disconnect) {
1657 e70fd952 2024-03-22 stsp 			if (err)
1658 e70fd952 2024-03-22 stsp 				disconnect_on_error(client, err);
1659 e70fd952 2024-03-22 stsp 			else
1660 e70fd952 2024-03-22 stsp 				disconnect(client);
1661 e70fd952 2024-03-22 stsp 		} else if (do_list_refs)
1662 e70fd952 2024-03-22 stsp 			err = list_refs_request();
1663 e70fd952 2024-03-22 stsp 
1664 e70fd952 2024-03-22 stsp 		if (err)
1665 e70fd952 2024-03-22 stsp 			log_warnx("uid %d: %s", client->euid, err->msg);
1666 e70fd952 2024-03-22 stsp 	}
1667 e70fd952 2024-03-22 stsp done:
1668 e70fd952 2024-03-22 stsp 	if (!shut) {
1669 e70fd952 2024-03-22 stsp 		gotd_imsg_event_add(iev);
1670 e70fd952 2024-03-22 stsp 	} else {
1671 e70fd952 2024-03-22 stsp 		/* This pipe is dead. Remove its event handler */
1672 e70fd952 2024-03-22 stsp 		event_del(&iev->ev);
1673 e70fd952 2024-03-22 stsp 		event_loopexit(NULL);
1674 e70fd952 2024-03-22 stsp 	}
1675 e70fd952 2024-03-22 stsp }
1676 e70fd952 2024-03-22 stsp 
1677 e70fd952 2024-03-22 stsp void
1678 e70fd952 2024-03-22 stsp session_write_main(const char *title, const char *repo_path,
1679 e70fd952 2024-03-22 stsp     int *pack_fds, int *temp_fds, struct timeval *request_timeout,
1680 e70fd952 2024-03-22 stsp     struct gotd_repo *repo_cfg)
1681 e70fd952 2024-03-22 stsp {
1682 e70fd952 2024-03-22 stsp 	const struct got_error *err = NULL;
1683 e70fd952 2024-03-22 stsp 	struct event evsigint, evsigterm, evsighup, evsigusr1;
1684 e70fd952 2024-03-22 stsp 
1685 e70fd952 2024-03-22 stsp 	STAILQ_INIT(&notifications);
1686 e70fd952 2024-03-22 stsp 
1687 e70fd952 2024-03-22 stsp 	gotd_session.title = title;
1688 e70fd952 2024-03-22 stsp 	gotd_session.pid = getpid();
1689 e70fd952 2024-03-22 stsp 	gotd_session.pack_fds = pack_fds;
1690 e70fd952 2024-03-22 stsp 	gotd_session.temp_fds = temp_fds;
1691 e70fd952 2024-03-22 stsp 	memcpy(&gotd_session.request_timeout, request_timeout,
1692 e70fd952 2024-03-22 stsp 	    sizeof(gotd_session.request_timeout));
1693 e70fd952 2024-03-22 stsp 	gotd_session.repo_cfg = repo_cfg;
1694 e70fd952 2024-03-22 stsp 
1695 e70fd952 2024-03-22 stsp 	imsg_init(&gotd_session.notifier_iev.ibuf, -1);
1696 e70fd952 2024-03-22 stsp 
1697 e70fd952 2024-03-22 stsp 	err = got_repo_open(&gotd_session.repo, repo_path, NULL, pack_fds);
1698 e70fd952 2024-03-22 stsp 	if (err)
1699 e70fd952 2024-03-22 stsp 		goto done;
1700 e70fd952 2024-03-22 stsp 	if (!got_repo_is_bare(gotd_session.repo)) {
1701 e70fd952 2024-03-22 stsp 		err = got_error_msg(GOT_ERR_NOT_GIT_REPO,
1702 e70fd952 2024-03-22 stsp 		    "bare git repository required");
1703 e70fd952 2024-03-22 stsp 		goto done;
1704 e70fd952 2024-03-22 stsp 	}
1705 c214ca4f 2024-08-01 op 	if (got_repo_get_object_format(gotd_session.repo) != GOT_HASH_SHA1) {
1706 c214ca4f 2024-08-01 op 		err = got_error_msg(GOT_ERR_NOT_IMPL,
1707 c214ca4f 2024-08-01 op 		    "sha256 object IDs unsupported in network protocol");
1708 c214ca4f 2024-08-01 op 		goto done;
1709 c214ca4f 2024-08-01 op 	}
1710 e70fd952 2024-03-22 stsp 
1711 e70fd952 2024-03-22 stsp 	got_repo_temp_fds_set(gotd_session.repo, temp_fds);
1712 e70fd952 2024-03-22 stsp 
1713 e70fd952 2024-03-22 stsp 	signal_set(&evsigint, SIGINT, session_write_sighdlr, NULL);
1714 e70fd952 2024-03-22 stsp 	signal_set(&evsigterm, SIGTERM, session_write_sighdlr, NULL);
1715 e70fd952 2024-03-22 stsp 	signal_set(&evsighup, SIGHUP, session_write_sighdlr, NULL);
1716 e70fd952 2024-03-22 stsp 	signal_set(&evsigusr1, SIGUSR1, session_write_sighdlr, NULL);
1717 e70fd952 2024-03-22 stsp 	signal(SIGPIPE, SIG_IGN);
1718 e70fd952 2024-03-22 stsp 
1719 e70fd952 2024-03-22 stsp 	signal_add(&evsigint, NULL);
1720 e70fd952 2024-03-22 stsp 	signal_add(&evsigterm, NULL);
1721 e70fd952 2024-03-22 stsp 	signal_add(&evsighup, NULL);
1722 e70fd952 2024-03-22 stsp 	signal_add(&evsigusr1, NULL);
1723 e70fd952 2024-03-22 stsp 
1724 e70fd952 2024-03-22 stsp 	gotd_session.state = GOTD_STATE_EXPECT_LIST_REFS;
1725 e70fd952 2024-03-22 stsp 
1726 e70fd952 2024-03-22 stsp 	gotd_session_client.fd = -1;
1727 e70fd952 2024-03-22 stsp 	gotd_session_client.nref_updates = -1;
1728 e70fd952 2024-03-22 stsp 	gotd_session_client.delta_cache_fd = -1;
1729 e70fd952 2024-03-22 stsp 	gotd_session_client.accept_flush_pkt = 1;
1730 e70fd952 2024-03-22 stsp 
1731 e70fd952 2024-03-22 stsp 	imsg_init(&gotd_session.parent_iev.ibuf, GOTD_FILENO_MSG_PIPE);
1732 e70fd952 2024-03-22 stsp 	gotd_session.parent_iev.handler = session_dispatch;
1733 e70fd952 2024-03-22 stsp 	gotd_session.parent_iev.events = EV_READ;
1734 e70fd952 2024-03-22 stsp 	gotd_session.parent_iev.handler_arg = NULL;
1735 e70fd952 2024-03-22 stsp 	event_set(&gotd_session.parent_iev.ev, gotd_session.parent_iev.ibuf.fd,
1736 e70fd952 2024-03-22 stsp 	    EV_READ, session_dispatch, &gotd_session.parent_iev);
1737 e70fd952 2024-03-22 stsp 	if (gotd_imsg_compose_event(&gotd_session.parent_iev,
1738 e70fd952 2024-03-22 stsp 	    GOTD_IMSG_CLIENT_SESSION_READY, PROC_SESSION_WRITE,
1739 e70fd952 2024-03-22 stsp 	    -1, NULL, 0) == -1) {
1740 e70fd952 2024-03-22 stsp 		err = got_error_from_errno("imsg compose CLIENT_SESSION_READY");
1741 e70fd952 2024-03-22 stsp 		goto done;
1742 e70fd952 2024-03-22 stsp 	}
1743 e70fd952 2024-03-22 stsp 
1744 e70fd952 2024-03-22 stsp 	event_dispatch();
1745 e70fd952 2024-03-22 stsp done:
1746 e70fd952 2024-03-22 stsp 	if (err)
1747 e70fd952 2024-03-22 stsp 		log_warnx("%s: %s", title, err->msg);
1748 e70fd952 2024-03-22 stsp 	session_write_shutdown();
1749 e70fd952 2024-03-22 stsp }
1750 e70fd952 2024-03-22 stsp 
1751 e70fd952 2024-03-22 stsp static void
1752 e70fd952 2024-03-22 stsp session_write_shutdown(void)
1753 e70fd952 2024-03-22 stsp {
1754 e70fd952 2024-03-22 stsp 	struct gotd_session_notif *notif;
1755 e70fd952 2024-03-22 stsp 
1756 e8d451cc 2024-03-22 stsp 	log_debug("%s: shutting down", gotd_session.title);
1757 e70fd952 2024-03-22 stsp 
1758 e70fd952 2024-03-22 stsp 	while (!STAILQ_EMPTY(&notifications)) {
1759 e70fd952 2024-03-22 stsp 		notif = STAILQ_FIRST(&notifications);
1760 e70fd952 2024-03-22 stsp 		STAILQ_REMOVE_HEAD(&notifications, entry);
1761 e70fd952 2024-03-22 stsp 		if (notif->fd != -1)
1762 e70fd952 2024-03-22 stsp 			close(notif->fd);
1763 e70fd952 2024-03-22 stsp 		free(notif->refname);
1764 e70fd952 2024-03-22 stsp 		free(notif);
1765 e70fd952 2024-03-22 stsp 	}
1766 e70fd952 2024-03-22 stsp 
1767 e70fd952 2024-03-22 stsp 	if (gotd_session.repo)
1768 e70fd952 2024-03-22 stsp 		got_repo_close(gotd_session.repo);
1769 e70fd952 2024-03-22 stsp 	got_repo_pack_fds_close(gotd_session.pack_fds);
1770 e70fd952 2024-03-22 stsp 	got_repo_temp_fds_close(gotd_session.temp_fds);
1771 e70fd952 2024-03-22 stsp 	free(gotd_session_client.username);
1772 e70fd952 2024-03-22 stsp 	exit(0);
1773 e70fd952 2024-03-22 stsp }