From nobody Sun Feb 13 09:51:01 2022 X-Original-To: dev-commits-src-all@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4796119AC580; Sun, 13 Feb 2022 09:51:02 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (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 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4JxN061Ym3z4bDR; Sun, 13 Feb 2022 09:51:02 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1644745862; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=KS7m7W+j3o8ah1jJrO8MxyhAvqpasn07BvUfnP3HZ78=; b=HRd1q/t+Y8kopiXMfhFmYE7fbfSq6bO7pErxHpE5PKvtHlBCusgTbtkXJjTt0cy7BIsDjB mvTGOfPywIwZ4yub7OaSgcHRnImebJQdv1fRI/yiA0yU/LxebL6IlzHoEbK0LPWXWUF9sc ie6WLy+NZ8heVkMZP9TugVUMb+OKOuVsDViNdlDnUs64lw13mP338DKXMol/m5Rho9Mv/2 TkL1xtYBuHIVjpEPjrWKnFo5CLaol+J75kCcuxdgJoT/SsmN8A9PLKmgf/4AL1KXlV+eRv oALRmK8Tg5yW38Hjv+aVsxL5+C2JQIW2VdpJgz9Xh6bWBszxAURQflM29OVDMQ== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (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) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 15B5918D66; Sun, 13 Feb 2022 09:51:02 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 21D9p1pF017836; Sun, 13 Feb 2022 09:51:01 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 21D9p18K017835; Sun, 13 Feb 2022 09:51:01 GMT (envelope-from git) Date: Sun, 13 Feb 2022 09:51:01 GMT Message-Id: <202202130951.21D9p18K017835@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Peter Holm Subject: git: 6fbbb4806322 - main - stress2: Added a tool to zero out a superblock check hash. List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-all@freebsd.org X-BeenThere: dev-commits-src-all@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: pho X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 6fbbb4806322e61e5b838e4160af12b821f99f0c Auto-Submitted: auto-generated ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1644745862; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=KS7m7W+j3o8ah1jJrO8MxyhAvqpasn07BvUfnP3HZ78=; b=A/zGvAspNLIP2RW4ewL0m8xTi988bGRg8E9T08SeMPZCwn2xQAbXH/K2WZR9Xm8xAFmjGw +v4VpgZKuVVbZ+6Zb/ReIH0Jvr5V5ouvw2tOg8dHKNP1tBQ0EclgGFV/q/mNJg9IGhzpqo xgQpcqLOO2wizQPQPqFbxEH4PGCunWQyAdwh37806i7/M1UF2dx439MVo5tvhNywnlXfB/ /gjzYljO3kdUZ/pic6U5fx5toeUMlU+EqwQVlGZqTvEtZlGah43SNa23SWV+rdPLEZOSWr ivZDQDgRH1invvJwE5E6wY8fyUNycgzxXJWhIGK0wtvnRBnF8Mb6WiRfVSVV+w== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1644745862; a=rsa-sha256; cv=none; b=NMwdzVFswm3s6yCfb5FKOt4NI/bkEjvc2Xr8HhZ8LOl27XOkDxXHCYt1tQo3fCeEqONQbK lk2QASMmmSXveOFzTYz4ZBBtiGrWa0oVpjWsthqfY21a8ZypLLFLFi1px6skxOG02kjP8o mithKL+9d2UlXKiotz+bN6hxwGDIcKnP/xWTf2eP9OzhleJ9EBpSFnyzUbuGLiAlS7s0mZ ot8tyA4JXyQRSZmz4q9vQGKF2QNQfVwiXxf/FfJ62oIl3IS5pfUs9xm7rC1ONmaaNQvQ2W eIn+eQ4CFV+yPj6NN7uENJXxTRs64vyhZ84zFaP95bvJdyQS3CVfMasPIaDCIA== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N The branch main has been updated by pho: URL: https://cgit.FreeBSD.org/src/commit/?id=6fbbb4806322e61e5b838e4160af12b821f99f0c commit 6fbbb4806322e61e5b838e4160af12b821f99f0c Author: Kirk McKusick AuthorDate: 2022-02-13 09:47:20 +0000 Commit: Peter Holm CommitDate: 2022-02-13 09:47:20 +0000 stress2: Added a tool to zero out a superblock check hash. --- tools/test/stress2/tools/zapsb.c | 75 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) diff --git a/tools/test/stress2/tools/zapsb.c b/tools/test/stress2/tools/zapsb.c new file mode 100644 index 000000000000..09e16e27c322 --- /dev/null +++ b/tools/test/stress2/tools/zapsb.c @@ -0,0 +1,75 @@ +/* + * Zero out a superblock check hash. + * By Kirk McKusick + */ + +#include +#include + +#include +#include + +#include +#include +#include +#include +#include +#include + +/* + * Possible superblock locations ordered from most to least likely. + */ +static int sblock_try[] = SBLOCKSEARCH; + +static void +usage(void) +{ + (void)fprintf(stderr, "usage: zapsb special_device\n"); + exit(1); +} + +int +main(int argc, char *argv[]) +{ + char *fs, sblock[SBLOCKSIZE]; + struct fs *sbp; + int i, fd; + + if (argc != 2) + usage(); + + fs = *++argv; + + /* get the superblock. */ + if ((fd = open(fs, O_RDWR, 0)) < 0) + err(1, "%s", fs); + for (i = 0; sblock_try[i] != -1; i++) { + if (lseek(fd, (off_t)(sblock_try[i]), SEEK_SET) < 0) + err(1, "%s", fs); + if (read(fd, sblock, sizeof(sblock)) != sizeof(sblock)) + errx(1, "%s: can't read superblock", fs); + sbp = (struct fs *)sblock; + if ((sbp->fs_magic == FS_UFS1_MAGIC || + (sbp->fs_magic == FS_UFS2_MAGIC && + sbp->fs_sblockloc == sblock_try[i])) && + sbp->fs_bsize <= MAXBSIZE && + sbp->fs_bsize >= (int)sizeof(struct fs)) + break; + } + if (sblock_try[i] == -1) { + fprintf(stderr, "Cannot find file system superblock\n"); + exit(2); + } + if ((sbp->fs_metackhash & CK_SUPERBLOCK) == 0) { + fprintf(stderr, "file system superblock has no check hash\n"); + exit(3); + } + printf("zeroing superblock checksum at location %d\n", sblock_try[i]); + sbp->fs_ckhash = 0; + if (lseek(fd, (off_t)(sblock_try[i]), SEEK_SET) < 0) + err(1, "%s", fs); + if (write(fd, sblock, sizeof(sblock)) != sizeof(sblock)) + errx(1, "%s: can't write superblock", fs); + (void)close(fd); + exit(0); +}