From patchwork Thu Feb 29 12:48:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juergen Gross X-Patchwork-Id: 13577080 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 41FFBC54E49 for ; Thu, 29 Feb 2024 12:49:06 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.687044.1069816 (Exim 4.92) (envelope-from ) id 1rffqL-0005Ni-4X; Thu, 29 Feb 2024 12:48:57 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 687044.1069816; Thu, 29 Feb 2024 12:48:57 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1rffqL-0005NX-1M; Thu, 29 Feb 2024 12:48:57 +0000 Received: by outflank-mailman (input) for mailman id 687044; Thu, 29 Feb 2024 12:48:56 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1rffqK-0003qK-6P for xen-devel@lists.xenproject.org; Thu, 29 Feb 2024 12:48:56 +0000 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.223.131]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id e6021e57-d700-11ee-afd8-a90da7624cb6; Thu, 29 Feb 2024 13:48:55 +0100 (CET) Received: from imap2.dmz-prg2.suse.org (imap2.dmz-prg2.suse.org [IPv6:2a07:de40:b281:104:10:150:64:98]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 2E4A51F7DD; Thu, 29 Feb 2024 12:48:55 +0000 (UTC) Received: from imap2.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap2.dmz-prg2.suse.org (Postfix) with ESMTPS id DCE251329E; Thu, 29 Feb 2024 12:48:54 +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 om5ENDZ94GUaIgAAn2gu4w (envelope-from ); Thu, 29 Feb 2024 12:48:54 +0000 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: e6021e57-d700-11ee-afd8-a90da7624cb6 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1709210935; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xUq3AE+SsnVI0DjnPSJQwNriZRE6cVmY47vrUqUrQuc=; b=Zhx+SPnTxks/JXFIrtG+IJisVmMcPJAIKk/4Bp0F8OUE6nXWEAjIGQz0RkQW1w80MSktmD tFiupbVk/jkU0bXmfHx4BfuLTfdNozVywRPM2jrE0BodbQyNGR3yI2GDWWuC2pwpKTHl6+ ibTmJ5wp2vCKsC1y2vmL4ZOjMxNafmE= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1709210935; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xUq3AE+SsnVI0DjnPSJQwNriZRE6cVmY47vrUqUrQuc=; b=Zhx+SPnTxks/JXFIrtG+IJisVmMcPJAIKk/4Bp0F8OUE6nXWEAjIGQz0RkQW1w80MSktmD tFiupbVk/jkU0bXmfHx4BfuLTfdNozVywRPM2jrE0BodbQyNGR3yI2GDWWuC2pwpKTHl6+ ibTmJ5wp2vCKsC1y2vmL4ZOjMxNafmE= From: Juergen Gross To: xen-devel@lists.xenproject.org Cc: Juergen Gross , Wei Liu , Julien Grall , Anthony PERARD , Jason Andryuk , Julien Grall Subject: [PATCH v9 4/6] tools/xenstored: add helpers for filename handling Date: Thu, 29 Feb 2024 13:48:28 +0100 Message-Id: <20240229124830.13680-5-jgross@suse.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20240229124830.13680-1-jgross@suse.com> References: <20240229124830.13680-1-jgross@suse.com> MIME-Version: 1.0 Authentication-Results: smtp-out2.suse.de; dkim=pass header.d=suse.com header.s=susede1 header.b=Zhx+SPnT X-Spamd-Result: default: False [-0.31 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[suse.com:s=susede1]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:98:from]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; R_MISSING_CHARSET(2.50)[]; MIME_GOOD(-0.10)[text/plain]; TO_MATCH_ENVRCPT_ALL(0.00)[]; BROKEN_CONTENT_TYPE(1.50)[]; DWL_DNSWL_MED(-2.00)[suse.com:dkim]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; DKIM_TRACE(0.00)[suse.com:+]; MX_GOOD(-0.01)[]; RCPT_COUNT_SEVEN(0.00)[7]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:dkim,suse.com:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_CC(0.00)[suse.com,xen.org,citrix.com,gmail.com,amazon.com]; RCVD_TLS_ALL(0.00)[]; BAYES_HAM(-3.00)[100.00%] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Rspamd-Queue-Id: 2E4A51F7DD X-Spamd-Bar: / 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 = -1; bool keep_orphans = false; -char *tracefile = NULL; +const char *tracefile = NULL; static struct hashtable *nodes; unsigned int trace_flags = TRACE_OBJ | TRACE_IO; @@ -137,6 +137,17 @@ void trace_destroy(const void *data, const char *type) trace("obj: DESTROY %s %p\n", type, data); } +/* + * 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] != '/') + return talloc_asprintf(ctx, XENSTORE_LIB_DIR "/%s", filename); + return talloc_strdup(ctx, filename); +} + void close_log(void) { if (tracefd >= 0) @@ -2759,7 +2770,7 @@ int main(int argc, char *argv[]) #endif if (tracefile) - tracefile = talloc_strdup(NULL, tracefile); + tracefile = absolute_filename(NULL, tracefile); #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; -extern char *tracefile; +extern const char *tracefile; extern int tracefd; /* 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 +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); 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 = 0; state->filename = talloc_asprintf(NULL, "%s/state_dump", - xenstore_daemon_rundir()); + xenstore_rundir()); if (!state->filename) barf("Allocation failure"); @@ -65,7 +65,7 @@ FILE *lu_dump_open(const void *ctx) int fd; filename = talloc_asprintf(ctx, "%s/state_dump", - xenstore_daemon_rundir()); + xenstore_rundir()); if (!filename) return NULL; 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 char *pidfile) { reopen_log(); - /* 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); if (dofork) { openlog("xenstored", 0, LOG_DAEMON); @@ -406,3 +407,8 @@ void set_socket_fd(int fd) { sock = fd; } + +const char *xenstore_rundir(void) +{ + return xenstore_daemon_rundir(); +}