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Fri, 16 Feb 2024 16:32:15 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap2.dmz-prg2.suse.org with ESMTPSA id EQsZDA+Oz2V5VAAAn2gu4w (envelope-from ); Fri, 16 Feb 2024 16:32:15 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: f1c86399-cce8-11ee-98f5-efadbce2ee36 From: Juergen Gross To: xen-devel@lists.xenproject.org Cc: Juergen Gross , Wei Liu , Julien Grall , Anthony PERARD , Jason Andryuk , Julien Grall Subject: [PATCH v8 6/8] tools/xenstored: add helpers for filename handling Date: Fri, 16 Feb 2024 17:31:37 +0100 Message-Id: <20240216163139.9093-7-jgross@suse.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20240216163139.9093-1-jgross@suse.com> References: <20240216163139.9093-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spam-Level: Authentication-Results: smtp-out1.suse.de; none X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spamd-Result: default: False [-4.00 / 50.00]; REPLY(-4.00)[] X-Spam-Score: -4.00 X-Rspamd-Queue-Id: 7ED0A22286 X-Spam-Flag: NO X-ZM-MESSAGEID: 1708101156420100001 Content-Type: text/plain; charset="utf-8" Add some helpers for handling filenames which might need different implementations between stubdom and daemon environments: - expansion of relative filenames (those are not really defined today, just expand them to be relative to /var/lib/xen/xenstore) - expansion of xenstore_daemon_rundir() (used e.g. for saving the state file in case of live update - needs to be unchanged in the daemon case, but should result in /var/lib/xen/xenstore for stubdom) Signed-off-by: Juergen Gross Reviewed-by: Jason Andryuk Reviewed-by: Julien Grall --- V3: - make absolute_filename() return a pointer to const (Julien Grall) --- tools/xenstored/core.c | 15 +++++++++++++-- tools/xenstored/core.h | 5 ++++- tools/xenstored/lu_daemon.c | 4 ++-- tools/xenstored/minios.c | 5 +++++ tools/xenstored/posix.c | 8 +++++++- 5 files changed, 31 insertions(+), 6 deletions(-) diff --git a/tools/xenstored/core.c b/tools/xenstored/core.c index 48fc787ac1..bada1ad9a2 100644 --- a/tools/xenstored/core.c +++ b/tools/xenstored/core.c @@ -63,7 +63,7 @@ char **orig_argv; LIST_HEAD(connections); int tracefd =3D -1; bool keep_orphans =3D false; -char *tracefile =3D NULL; +const char *tracefile =3D NULL; static struct hashtable *nodes; unsigned int trace_flags =3D TRACE_OBJ | TRACE_IO; =20 @@ -137,6 +137,17 @@ void trace_destroy(const void *data, const char *type) trace("obj: DESTROY %s %p\n", type, data); } =20 +/* + * Return an absolute filename. + * In case of a relative filename given as input, prepend XENSTORE_LIB_DIR. + */ +const char *absolute_filename(const void *ctx, const char *filename) +{ + if (filename[0] !=3D '/') + return talloc_asprintf(ctx, XENSTORE_LIB_DIR "/%s", filename); + return talloc_strdup(ctx, filename); +} + void close_log(void) { if (tracefd >=3D 0) @@ -2759,7 +2770,7 @@ int main(int argc, char *argv[]) #endif =20 if (tracefile) - tracefile =3D talloc_strdup(NULL, tracefile); + tracefile =3D absolute_filename(NULL, tracefile); =20 #ifndef NO_LIVE_UPDATE /* Read state in case of live update. */ diff --git a/tools/xenstored/core.h b/tools/xenstored/core.h index fe0ee90581..e58779e88c 100644 --- a/tools/xenstored/core.h +++ b/tools/xenstored/core.h @@ -341,7 +341,7 @@ void close_log(void); extern int orig_argc; extern char **orig_argv; =20 -extern char *tracefile; +extern const char *tracefile; extern int tracefd; =20 /* Trace flag values must be kept in sync with trace_switches[] contents. = */ @@ -405,6 +405,9 @@ void set_socket_fd(int fd); void mount_9pfs(void); #endif =20 +const char *xenstore_rundir(void); +const char *absolute_filename(const void *ctx, const char *filename); + /* Close stdin/stdout/stderr to complete daemonize */ void finish_daemonize(void); =20 diff --git a/tools/xenstored/lu_daemon.c b/tools/xenstored/lu_daemon.c index 71bcabadd3..6351111ab0 100644 --- a/tools/xenstored/lu_daemon.c +++ b/tools/xenstored/lu_daemon.c @@ -24,7 +24,7 @@ void lu_get_dump_state(struct lu_dump_state *state) state->size =3D 0; =20 state->filename =3D talloc_asprintf(NULL, "%s/state_dump", - xenstore_daemon_rundir()); + xenstore_rundir()); if (!state->filename) barf("Allocation failure"); =20 @@ -65,7 +65,7 @@ FILE *lu_dump_open(const void *ctx) int fd; =20 filename =3D talloc_asprintf(ctx, "%s/state_dump", - xenstore_daemon_rundir()); + xenstore_rundir()); if (!filename) return NULL; =20 diff --git a/tools/xenstored/minios.c b/tools/xenstored/minios.c index 562a9b4972..e70386f8c7 100644 --- a/tools/xenstored/minios.c +++ b/tools/xenstored/minios.c @@ -128,3 +128,8 @@ void mount_9pfs(void) { create_thread("mount-9pfs", mount_thread, NULL); } + +const char *xenstore_rundir(void) +{ + return XENSTORE_LIB_DIR; +} diff --git a/tools/xenstored/posix.c b/tools/xenstored/posix.c index 496329dfd1..d88c82d972 100644 --- a/tools/xenstored/posix.c +++ b/tools/xenstored/posix.c @@ -326,9 +326,10 @@ void early_init(bool live_update, bool dofork, const c= har *pidfile) { reopen_log(); =20 - /* Make sure xenstored directory exists. */ + /* Make sure xenstored directories exist. */ /* Errors ignored here, will be reported when we open files */ mkdir(xenstore_daemon_rundir(), 0755); + mkdir(XENSTORE_LIB_DIR, 0755); =20 if (dofork) { openlog("xenstored", 0, LOG_DAEMON); @@ -406,3 +407,8 @@ void set_socket_fd(int fd) { sock =3D fd; } + +const char *xenstore_rundir(void) +{ + return xenstore_daemon_rundir(); +} --=20 2.35.3