From patchwork Wed Jan 9 17:54:41 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 10754735 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E0F0214E5 for ; Wed, 9 Jan 2019 17:54:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D0FAA284E8 for ; Wed, 9 Jan 2019 17:54:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C5A7628AF4; Wed, 9 Jan 2019 17:54:43 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 40B54284E8 for ; Wed, 9 Jan 2019 17:54:43 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 36FBB211B5A4C; Wed, 9 Jan 2019 09:54:43 -0800 (PST) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=192.55.52.151; helo=mga17.intel.com; envelope-from=dave.jiang@intel.com; receiver=linux-nvdimm@lists.01.org Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 78CB4211B5A3B for ; Wed, 9 Jan 2019 09:54:42 -0800 (PST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 09 Jan 2019 09:54:42 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,458,1539673200"; d="scan'208";a="106956610" Received: from djiang5-desk3.ch.intel.com ([143.182.136.93]) by orsmga006.jf.intel.com with ESMTP; 09 Jan 2019 09:54:41 -0800 Subject: [PATCH v7 09/12] ndctl: add wait-overwrite support From: Dave Jiang To: vishal.l.verma@intel.com, dan.j.williams@intel.com Date: Wed, 09 Jan 2019 10:54:41 -0700 Message-ID: <154705648142.23227.17472415969905599862.stgit@djiang5-desk3.ch.intel.com> In-Reply-To: <154705633843.23227.15903675663299735878.stgit@djiang5-desk3.ch.intel.com> References: <154705633843.23227.15903675663299735878.stgit@djiang5-desk3.ch.intel.com> User-Agent: StGit/unknown-version MIME-Version: 1.0 X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-nvdimm@lists.01.org Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP Add a blocking 'wait-overwrite' command to ndctl to let a user wait for an overwrite operation on a dimm to complete. Signed-off-by: Dave Jiang --- Documentation/ndctl/Makefile.am | 3 + Documentation/ndctl/ndctl-wait-overwrite.txt | 31 ++++++++++ ndctl/builtin.h | 1 ndctl/dimm.c | 27 +++++++++ ndctl/lib/dimm.c | 78 ++++++++++++++++++++++++++ ndctl/lib/libndctl.sym | 1 ndctl/libndctl.h | 1 ndctl/ndctl.c | 1 8 files changed, 142 insertions(+), 1 deletion(-) create mode 100644 Documentation/ndctl/ndctl-wait-overwrite.txt diff --git a/Documentation/ndctl/Makefile.am b/Documentation/ndctl/Makefile.am index bbea9674..a60a67e5 100644 --- a/Documentation/ndctl/Makefile.am +++ b/Documentation/ndctl/Makefile.am @@ -52,7 +52,8 @@ man1_MANS = \ ndctl-update-passphrase.1 \ ndctl-disable-passphrase.1 \ ndctl-freeze-security.1 \ - ndctl-sanitize-dimm.1 + ndctl-sanitize-dimm.1 \ + ndctl-wait-overwrite.1 CLEANFILES = $(man1_MANS) diff --git a/Documentation/ndctl/ndctl-wait-overwrite.txt b/Documentation/ndctl/ndctl-wait-overwrite.txt new file mode 100644 index 00000000..5d4c72ef --- /dev/null +++ b/Documentation/ndctl/ndctl-wait-overwrite.txt @@ -0,0 +1,31 @@ +// SPDX-License-Identifier: GPL-2.0 + +ndctl-wait-overwrite(1) +======================= + +NAME +---- +ndctl-wait-overwrite - wait for nvdimm overwrite operation to complete + +SYNOPSIS +-------- +[verse] +'ndctl wait-overwrite' [] + +DESCRIPTION +----------- +The kernel provides a POLL(2) capable sysfs file ('security') to indicate +the state of overwrite. The 'ndctl wait-overwrite' operation waits for +a change in the state of the 'security' file across all specified dimms. + +OPTIONS +------- +-v:: +--verbose:: + Emit debug messages for the overwrite wait process + +include::../copyright.txt[] + +SEE ALSO +-------- +linkndctl:ndctl-sanitize-dimm[1] diff --git a/ndctl/builtin.h b/ndctl/builtin.h index 55bee47c..a8472e87 100644 --- a/ndctl/builtin.h +++ b/ndctl/builtin.h @@ -37,4 +37,5 @@ int cmd_passphrase_update(int argc, const char **argv, struct ndctl_ctx *ctx); int cmd_disable_passphrase(int argc, const char **argv, struct ndctl_ctx *ctx); int cmd_freeze_security(int argc, const char **argv, struct ndctl_ctx *ctx); int cmd_sanitize_dimm(int argc, const char **argv, struct ndctl_ctx *ctx); +int cmd_wait_overwrite(int argc, const char **argv, struct ndctl_ctx *ctx); #endif /* _NDCTL_BUILTIN_H_ */ diff --git a/ndctl/dimm.c b/ndctl/dimm.c index 799823d6..ce477981 100644 --- a/ndctl/dimm.c +++ b/ndctl/dimm.c @@ -931,6 +931,24 @@ static int action_sanitize_dimm(struct ndctl_dimm *dimm, return 0; } +static int action_wait_overwrite(struct ndctl_dimm *dimm, + struct action_context *actx) +{ + int rc; + + if (!ndctl_dimm_security_supported(dimm)) { + error("%s: security operation not supported\n", + ndctl_dimm_get_devname(dimm)); + return -EOPNOTSUPP; + } + + rc = ndctl_dimm_wait_overwrite(dimm); + if (rc == 1) + printf("%s: overwrite completed.\n", + ndctl_dimm_get_devname(dimm)); + return rc; +} + static int __action_init(struct ndctl_dimm *dimm, enum ndctl_namespace_version version, int chk_only) { @@ -1378,3 +1396,12 @@ int cmd_sanitize_dimm(int argc, const char **argv, void *ctx) count >= 0 ? count : 0, count > 1 ? "s" : ""); return count >= 0 ? 0 : EXIT_FAILURE; } + +int cmd_wait_overwrite(int argc, const char **argv, void *ctx) +{ + int count = dimm_action(argc, argv, ctx, action_wait_overwrite, + base_options, + "ndctl wait-overwrite [..] []"); + + return count >= 0 ? 0 : EXIT_FAILURE; +} diff --git a/ndctl/lib/dimm.c b/ndctl/lib/dimm.c index f27b966c..eb950331 100644 --- a/ndctl/lib/dimm.c +++ b/ndctl/lib/dimm.c @@ -16,6 +16,7 @@ #include #include #include +#include #include "private.h" static const char NSINDEX_SIGNATURE[] = "NAMESPACE_INDEX\0"; @@ -693,3 +694,80 @@ NDCTL_EXPORT int ndctl_dimm_overwrite(struct ndctl_dimm *dimm, long key) sprintf(buf, "overwrite %ld\n", key); return write_security(dimm, buf); } + +NDCTL_EXPORT int ndctl_dimm_wait_overwrite(struct ndctl_dimm *dimm) +{ + struct ndctl_ctx *ctx = ndctl_dimm_get_ctx(dimm); + struct pollfd fds; + char buf[SYSFS_ATTR_SIZE]; + int fd = 0, rc; + char *path = dimm->dimm_buf; + int len = dimm->buf_len; + + if (snprintf(path, len, "%s/security", dimm->dimm_path) >= len) { + err(ctx, "%s: buffer too small!\n", + ndctl_dimm_get_devname(dimm)); + return -ERANGE; + } + + fd = open(path, O_RDONLY|O_CLOEXEC); + if (fd < 0) { + rc = -errno; + err(ctx, "open: %s\n", strerror(errno)); + return rc; + } + memset(&fds, 0, sizeof(fds)); + fds.fd = fd; + + rc = sysfs_read_attr(ctx, path, buf); + if (rc < 0) { + rc = -EOPNOTSUPP; + goto out; + } + /* skipping if we aren't in overwrite state */ + if (strcmp(buf, "overwrite") != 0) { + rc = 0; + goto out; + } + + for (;;) { + rc = sysfs_read_attr(ctx, path, buf); + if (rc < 0) { + rc = -EOPNOTSUPP; + break; + } + + if (strcmp(buf, "overwrite") == 0) { + rc = poll(&fds, 1, -1); + if (rc < 0) { + rc = -errno; + err(ctx, "poll error: %s\n", strerror(errno)); + break; + } + dbg(ctx, "poll wake: revents: %d\n", fds.revents); + if (pread(fd, buf, 1, 0) == -1) { + rc = -errno; + break; + } + fds.revents = 0; + } else { + if (strcmp(buf, "disabled") == 0) + rc = 1; + break; + } + } + + if (rc == 1) + dbg(ctx, "%s: overwrite complete\n", + ndctl_dimm_get_devname(dimm)); + else if (rc == 0) + dbg(ctx, "%s: ovewrite skipped\n", + ndctl_dimm_get_devname(dimm)); + else + dbg(ctx, "%s: overwrite error waiting for complete\n", + ndctl_dimm_get_devname(dimm)); + + out: + close(fd); + return rc; +} diff --git a/ndctl/lib/libndctl.sym b/ndctl/lib/libndctl.sym index 0fedae1a..61e560e4 100644 --- a/ndctl/lib/libndctl.sym +++ b/ndctl/lib/libndctl.sym @@ -400,4 +400,5 @@ global: ndctl_dimm_secure_erase_key; ndctl_dimm_overwrite; ndctl_dimm_overwrite_key; + ndctl_dimm_wait_overwrite; } LIBNDCTL_18; diff --git a/ndctl/libndctl.h b/ndctl/libndctl.h index 1fbcfff4..ea4665e3 100644 --- a/ndctl/libndctl.h +++ b/ndctl/libndctl.h @@ -705,6 +705,7 @@ int ndctl_dimm_disable_passphrase(struct ndctl_dimm *dimm, long key); int ndctl_dimm_freeze_security(struct ndctl_dimm *dimm); int ndctl_dimm_secure_erase(struct ndctl_dimm *dimm, long key); int ndctl_dimm_overwrite(struct ndctl_dimm *dimm, long key); +int ndctl_dimm_wait_overwrite(struct ndctl_dimm *dimm); enum ndctl_key_type { ND_USER_KEY, diff --git a/ndctl/ndctl.c b/ndctl/ndctl.c index 09af1317..6ab9c8ff 100644 --- a/ndctl/ndctl.c +++ b/ndctl/ndctl.c @@ -93,6 +93,7 @@ static struct cmd_struct commands[] = { { "disable-passphrase", { cmd_disable_passphrase } }, { "freeze-security", { cmd_freeze_security } }, { "sanitize-dimm", { cmd_sanitize_dimm } }, + { "wait-overwrite", { cmd_wait_overwrite } }, { "list", { cmd_list } }, { "monitor", { cmd_monitor } }, { "help", { cmd_help } },