From patchwork Wed May 27 17:34:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Durrant X-Patchwork-Id: 11573633 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 72764159A for ; Wed, 27 May 2020 17:36:08 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 4E4BE20707 for ; Wed, 27 May 2020 17:36:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=xen.org header.i=@xen.org header.b="k5T6Pmii" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4E4BE20707 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xen.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jdzwd-00031r-4m; Wed, 27 May 2020 17:34:23 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jdzwb-00031V-F3 for xen-devel@lists.xenproject.org; Wed, 27 May 2020 17:34:21 +0000 X-Inumbo-ID: 4a30455a-a040-11ea-a76e-12813bfff9fa Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 4a30455a-a040-11ea-a76e-12813bfff9fa; Wed, 27 May 2020 17:34:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=gk5Uuo1wIab8QnJ+XZOG7n7mFLhPsfwOIEwveUEZ4oE=; b=k5T6PmiisbaV/n+gWHjfIqwxS0 05imcSEWrZrCA17JlA0shnHDAOq4Crt9aXEIw8lBe1CFsQLltUNS4I4Skz89eZjH7RfA+0+tAJHcT EmyamSH15v+VYboCncKonBOoCbkCMtwtoq0CwqJt8tBV6CmlIg1DuhLkkORTPS+6EUNA=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jdzwW-00016D-FC; Wed, 27 May 2020 17:34:16 +0000 Received: from 54-240-197-224.amazon.com ([54.240.197.224] helo=u2f063a87eabd5f.cbg10.amazon.com) by xenbits.xenproject.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jdzwW-0003od-6f; Wed, 27 May 2020 17:34:16 +0000 From: Paul Durrant To: xen-devel@lists.xenproject.org Subject: [PATCH v6 3/5] tools/misc: add xen-domctx to present domain context Date: Wed, 27 May 2020 18:34:05 +0100 Message-Id: <20200527173407.1398-4-paul@xen.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200527173407.1398-1-paul@xen.org> References: <20200527173407.1398-1-paul@xen.org> MIME-Version: 1.0 X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Andrew Cooper , Paul Durrant , Ian Jackson , Wei Liu , Paul Durrant Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" This tool is analogous to 'xen-hvmctx' which presents HVM context. Subsequent patches will add 'dump' functions when new records are introduced. Signed-off-by: Paul Durrant Acked-by: Ian Jackson --- Cc: Andrew Cooper Cc: Wei Liu NOTE: Ian requested ack from Andrew v3: - Re-worked to avoid copying onto stack - Added optional typecode and instance arguments v2: - Change name from 'xen-ctx' to 'xen-domctx' --- .gitignore | 1 + tools/misc/Makefile | 4 + tools/misc/xen-domctx.c | 200 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 205 insertions(+) create mode 100644 tools/misc/xen-domctx.c diff --git a/.gitignore b/.gitignore index 7418ce9829..6da3030f0d 100644 --- a/.gitignore +++ b/.gitignore @@ -209,6 +209,7 @@ tools/misc/xen_cpuperf tools/misc/xen-cpuid tools/misc/xen-detect tools/misc/xen-diag +tools/misc/xen-domctx tools/misc/xen-tmem-list-parse tools/misc/xen-livepatch tools/misc/xenperf diff --git a/tools/misc/Makefile b/tools/misc/Makefile index 63947bfadc..ef25524354 100644 --- a/tools/misc/Makefile +++ b/tools/misc/Makefile @@ -30,6 +30,7 @@ INSTALL_SBIN += xenpm INSTALL_SBIN += xenwatchdogd INSTALL_SBIN += xen-livepatch INSTALL_SBIN += xen-diag +INSTALL_SBIN += xen-domctx INSTALL_SBIN += $(INSTALL_SBIN-y) # Everything to be installed in a private bin/ @@ -108,6 +109,9 @@ xen-livepatch: xen-livepatch.o xen-diag: xen-diag.o $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenctrl) $(APPEND_LDFLAGS) +xen-domctx: xen-domctx.o + $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenctrl) $(APPEND_LDFLAGS) + xen-lowmemd: xen-lowmemd.o $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenevtchn) $(LDLIBS_libxenctrl) $(LDLIBS_libxenstore) $(APPEND_LDFLAGS) diff --git a/tools/misc/xen-domctx.c b/tools/misc/xen-domctx.c new file mode 100644 index 0000000000..243325dfce --- /dev/null +++ b/tools/misc/xen-domctx.c @@ -0,0 +1,200 @@ +/* + * xen-domctx.c + * + * Print out domain save records in a human-readable way. + * + * Copyright Amazon.com Inc. or its affiliates. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +static void *buf = NULL; +static size_t len, off; + +#define GET_PTR(_x) \ + do { \ + if ( len - off < sizeof(*(_x)) ) \ + { \ + fprintf(stderr, \ + "error: need another %lu bytes, only %lu available\n", \ + sizeof(*(_x)), len - off); \ + exit(1); \ + } \ + (_x) = buf + off; \ + } while (false); + +static void dump_header(void) +{ + DOMAIN_SAVE_TYPE(HEADER) *h; + + GET_PTR(h); + + printf(" HEADER: magic %#x, version %u\n", + h->magic, h->version); + +} + +static void dump_end(void) +{ + DOMAIN_SAVE_TYPE(END) *e; + + GET_PTR(e); + + printf(" END\n"); +} + +static void usage(const char *prog) +{ + fprintf(stderr, "usage: %s [ [ ]]\n", + prog); + exit(1); +} + +int main(int argc, char **argv) +{ + char *s, *e; + long domid; + long typecode = -1; + long instance = -1; + unsigned int entry; + xc_interface *xch; + int rc; + + if ( argc < 2 || argc > 4 ) + usage(argv[0]); + + s = e = argv[1]; + domid = strtol(s, &e, 0); + + if ( *s == '\0' || *e != '\0' || + domid < 0 || domid >= DOMID_FIRST_RESERVED ) + { + fprintf(stderr, "invalid domid '%s'\n", s); + exit(1); + } + + if ( argc >= 3 ) + { + s = e = argv[2]; + typecode = strtol(s, &e, 0); + + if ( *s == '\0' || *e != '\0' ) + { + fprintf(stderr, "invalid typecode '%s'\n", s); + exit(1); + } + } + + if ( argc == 4 ) + { + s = e = argv[3]; + instance = strtol(s, &e, 0); + + if ( *s == '\0' || *e != '\0' ) + { + fprintf(stderr, "invalid instance '%s'\n", s); + exit(1); + } + } + + xch = xc_interface_open(0, 0, 0); + if ( !xch ) + { + fprintf(stderr, "error: can't open libxc handle\n"); + exit(1); + } + + rc = xc_domain_getcontext(xch, domid, NULL, &len); + if ( rc < 0 ) + { + fprintf(stderr, "error: can't get record length for dom %lu: %s\n", + domid, strerror(errno)); + exit(1); + } + + buf = malloc(len); + if ( !buf ) + { + fprintf(stderr, "error: can't allocate %lu bytes\n", len); + exit(1); + } + + rc = xc_domain_getcontext(xch, domid, buf, &len); + if ( rc < 0 ) + { + fprintf(stderr, "error: can't get domain record for dom %lu: %s\n", + domid, strerror(errno)); + exit(1); + } + off = 0; + + entry = 0; + for ( ; ; ) + { + struct domain_save_descriptor *desc; + + GET_PTR(desc); + + off += sizeof(*desc); + + if ( (typecode < 0 || typecode == desc->typecode) && + (instance < 0 || instance == desc->instance) ) + { + printf("[%u] type: %u instance: %u length: %u\n", entry++, + desc->typecode, desc->instance, desc->length); + + switch (desc->typecode) + { + case DOMAIN_SAVE_CODE(HEADER): dump_header(); break; + case DOMAIN_SAVE_CODE(END): dump_end(); break; + default: + printf("Unknown type %u: skipping\n", desc->typecode); + break; + } + } + + if ( desc->typecode == DOMAIN_SAVE_CODE(END) ) + break; + + off += desc->length; + } + + return 0; +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */