From patchwork Mon Sep 2 16:45:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aleksa Sarai X-Patchwork-Id: 13787516 Received: from mout-p-202.mailbox.org (mout-p-202.mailbox.org [80.241.56.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E922C1AB6CD; Mon, 2 Sep 2024 16:46:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.241.56.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725295607; cv=none; b=Y9Ur3+AtNMlueot3+ql/VIEzfSMTZr3fwCbBFW30legylVQXgSh6GAY2Cz1JkJAzEqSbsjdvg2oqZ+4J9pHJ1mz0rKmrgHv+M8dhuXD4yrCvpATyE6g5IQwGkxTZ7+cw02s0K70lMooc+6WEGwtKFkTKcOXZle9Df3d2qP0RyIY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725295607; c=relaxed/simple; bh=3ySDphIri67ITu79vFNri2dq5x9q7K5fhocLgNYeNNQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fs8HKqu8BGObwp5Ys08PxZy+2hyK5woQC7YnFy+BDBBQ0MYriae936mif8cI7O+O/TgKpmSFE7XOcI9IRSmARbHfbKRB53EGy20TLLzQvcMnPNVOLcjNf0gvtAZhnZJvjIThbZhi0p0Lp95Cv2y1/G/vCeZhUyZHKWL/e8SDAAs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=cyphar.com; spf=pass smtp.mailfrom=cyphar.com; dkim=pass (2048-bit key) header.d=cyphar.com header.i=@cyphar.com header.b=Vhj0QrJl; arc=none smtp.client-ip=80.241.56.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=cyphar.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=cyphar.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=cyphar.com header.i=@cyphar.com header.b="Vhj0QrJl" Received: from smtp2.mailbox.org (smtp2.mailbox.org [IPv6:2001:67c:2050:b231:465::2]) (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 mout-p-202.mailbox.org (Postfix) with ESMTPS id 4WyF5Y5ysYz9shr; Mon, 2 Sep 2024 18:46:41 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cyphar.com; s=MBO0001; t=1725295601; h=from:from:reply-to:subject:subject: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=x66EuGGlz3pxlYhBctrJwxHVdTlDHq87kHTAxu/3p04=; b=Vhj0QrJlKTgnzyWL33d2kqM9VtDnDEU7zdhihvLq+hwjkTp+k4XbATKNA8DrG1TlIOAvwQ 2+ptQzpaRowbs7XSze0NfjLLY/lDQUJe67LaHsSU3tAHi2yxTnjwp+hf5ExBwMiJO0fJbu K5TLXbx2++jtRv+G1B9uX63ZVVWilA+zyE+YtQiiPmwvUdSOw1eAw41LzjD2RaKJ26CEy3 A12UT1UjLT/9Ru5uj+OzitrlqpfPIk0Uy84JbqOtRi0AZThTDU0N4U36oIbC4CvUgYeSvn DA8QHn8AT7kt3SBNW5LXgOCGU/juV/px+cnBj5EBKsag3hQ41URSSU+qWYhKGw== From: Aleksa Sarai To: fstests@vger.kernel.org, Alexander Viro , Christian Brauner , Jan Kara , Chuck Lever , Jeff Layton , Amir Goldstein , Alexander Aring , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , "Liang, Kan" Cc: Aleksa Sarai , Christoph Hellwig , Josef Bacik , linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, linux-perf-users@vger.kernel.org Subject: [PATCH xfstests v2 2/2] open_by_handle: add tests for u64 mount ID Date: Tue, 3 Sep 2024 02:45:54 +1000 Message-ID: <20240902164554.928371-2-cyphar@cyphar.com> In-Reply-To: <20240902164554.928371-1-cyphar@cyphar.com> References: <20240828-exportfs-u64-mount-id-v3-0-10c2c4c16708@cyphar.com> <20240902164554.928371-1-cyphar@cyphar.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Rspamd-Queue-Id: 4WyF5Y5ysYz9shr Now that open_by_handle_at(2) can return u64 mount IDs, do some tests to make sure they match properly as part of the regular open_by_handle tests. Link: https://lore.kernel.org/all/20240828-exportfs-u64-mount-id-v3-0-10c2c4c16708@cyphar.com/ Signed-off-by: Aleksa Sarai Reviewed-by: Amir Goldstein --- v2: - Remove -M argument and always do the mount ID tests. [Amir Goldstein] - Do not error out if the kernel doesn't support STATX_MNT_ID_UNIQUE or AT_HANDLE_MNT_ID_UNIQUE. [Amir Goldstein] - v1: src/open_by_handle.c | 128 +++++++++++++++++++++++++++++++++---------- 1 file changed, 99 insertions(+), 29 deletions(-) diff --git a/src/open_by_handle.c b/src/open_by_handle.c index d9c802ca9bd1..0ad591da632e 100644 --- a/src/open_by_handle.c +++ b/src/open_by_handle.c @@ -86,10 +86,16 @@ Examples: #include #include #include +#include +#include #include #include "statx.h" +#ifndef AT_HANDLE_MNT_ID_UNIQUE +# define AT_HANDLE_MNT_ID_UNIQUE 0x001 +#endif + #define MAXFILES 1024 struct handle { @@ -120,6 +126,94 @@ void usage(void) exit(EXIT_FAILURE); } +int do_name_to_handle_at(const char *fname, struct file_handle *fh, int bufsz) +{ + int ret; + int mntid_short; + + static bool skip_mntid_unique; + + uint64_t statx_mntid_short = 0, statx_mntid_unique = 0; + struct statx statxbuf; + + /* Get both the short and unique mount id. */ + if (statx(AT_FDCWD, fname, 0, STATX_MNT_ID, &statxbuf) < 0) { + fprintf(stderr, "%s: statx(STATX_MNT_ID): %m\n", fname); + return EXIT_FAILURE; + } + if (!(statxbuf.stx_mask & STATX_MNT_ID)) { + fprintf(stderr, "%s: no STATX_MNT_ID in stx_mask\n", fname); + return EXIT_FAILURE; + } + statx_mntid_short = statxbuf.stx_mnt_id; + + if (!skip_mntid_unique) { + if (statx(AT_FDCWD, fname, 0, STATX_MNT_ID_UNIQUE, &statxbuf) < 0) { + fprintf(stderr, "%s: statx(STATX_MNT_ID_UNIQUE): %m\n", fname); + return EXIT_FAILURE; + } + /* + * STATX_MNT_ID_UNIQUE was added fairly recently in Linux 6.8, so if the + * kernel doesn't give us a unique mount ID just skip it. + */ + if ((skip_mntid_unique |= !(statxbuf.stx_mask & STATX_MNT_ID_UNIQUE))) + printf("statx(STATX_MNT_ID_UNIQUE) not supported by running kernel -- skipping unique mount ID test\n"); + else + statx_mntid_unique = statxbuf.stx_mnt_id; + } + + fh->handle_bytes = bufsz; + ret = name_to_handle_at(AT_FDCWD, fname, fh, &mntid_short, 0); + if (bufsz < fh->handle_bytes) { + /* Query the filesystem required bufsz and the file handle */ + if (ret != -1 || errno != EOVERFLOW) { + fprintf(stderr, "%s: unexpected result from name_to_handle_at: %d (%m)\n", fname, ret); + return EXIT_FAILURE; + } + ret = name_to_handle_at(AT_FDCWD, fname, fh, &mntid_short, 0); + } + if (ret < 0) { + fprintf(stderr, "%s: name_to_handle: %m\n", fname); + return EXIT_FAILURE; + } + + if (mntid_short != (int) statx_mntid_short) { + fprintf(stderr, "%s: name_to_handle_at returned a different mount ID to STATX_MNT_ID: %u != %lu\n", fname, mntid_short, statx_mntid_short); + return EXIT_FAILURE; + } + + if (!skip_mntid_unique && statx_mntid_unique != 0) { + struct handle dummy_fh; + uint64_t mntid_unique = 0; + + /* + * Get the unique mount ID. We don't need to get another copy of the + * handle so store it in a dummy struct. + */ + dummy_fh.fh.handle_bytes = fh->handle_bytes; + ret = name_to_handle_at(AT_FDCWD, fname, &dummy_fh.fh, (int *) &mntid_unique, AT_HANDLE_MNT_ID_UNIQUE); + if (ret < 0) { + if (errno != EINVAL) { + fprintf(stderr, "%s: name_to_handle_at(AT_HANDLE_MNT_ID_UNIQUE): %m\n", fname); + return EXIT_FAILURE; + } + /* + * EINVAL means AT_HANDLE_MNT_ID_UNIQUE is not supported, so skip + * the check in that case. + */ + printf("name_to_handle_at(AT_HANDLE_MNT_ID_UNIQUE) not supported by running kernel -- skipping unique mount ID test\n"); + skip_mntid_unique = true; + } else { + if (mntid_unique != statx_mntid_unique) { + fprintf(stderr, "%s: name_to_handle_at(AT_HANDLE_MNT_ID_UNIQUE) returned a different mount ID to STATX_MNT_ID_UNIQUE: %lu != %lu\n", fname, mntid_unique, statx_mntid_unique); + return EXIT_FAILURE; + } + } + } + + return 0; +} + int main(int argc, char **argv) { int i, c; @@ -132,7 +226,7 @@ int main(int argc, char **argv) char fname2[PATH_MAX]; char *test_dir; char *mount_dir; - int mount_fd, mount_id; + int mount_fd; char *infile = NULL, *outfile = NULL; int in_fd = 0, out_fd = 0; int numfiles = 1; @@ -307,21 +401,9 @@ int main(int argc, char **argv) return EXIT_FAILURE; } } else { - handle[i].fh.handle_bytes = bufsz; - ret = name_to_handle_at(AT_FDCWD, fname, &handle[i].fh, &mount_id, 0); - if (bufsz < handle[i].fh.handle_bytes) { - /* Query the filesystem required bufsz and the file handle */ - if (ret != -1 || errno != EOVERFLOW) { - fprintf(stderr, "Unexpected result from name_to_handle_at(%s)\n", fname); - return EXIT_FAILURE; - } - ret = name_to_handle_at(AT_FDCWD, fname, &handle[i].fh, &mount_id, 0); - } - if (ret < 0) { - strcat(fname, ": name_to_handle"); - perror(fname); + ret = do_name_to_handle_at(fname, &handle[i].fh, bufsz); + if (ret < 0) return EXIT_FAILURE; - } } if (keepopen) { /* Open without close to keep unlinked files around */ @@ -349,21 +431,9 @@ int main(int argc, char **argv) return EXIT_FAILURE; } } else { - dir_handle.fh.handle_bytes = bufsz; - ret = name_to_handle_at(AT_FDCWD, test_dir, &dir_handle.fh, &mount_id, 0); - if (bufsz < dir_handle.fh.handle_bytes) { - /* Query the filesystem required bufsz and the file handle */ - if (ret != -1 || errno != EOVERFLOW) { - fprintf(stderr, "Unexpected result from name_to_handle_at(%s)\n", dname); - return EXIT_FAILURE; - } - ret = name_to_handle_at(AT_FDCWD, test_dir, &dir_handle.fh, &mount_id, 0); - } - if (ret < 0) { - strcat(dname, ": name_to_handle"); - perror(dname); + ret = do_name_to_handle_at(test_dir, &dir_handle.fh, bufsz); + if (ret < 0) return EXIT_FAILURE; - } } if (out_fd) { ret = write(out_fd, (char *)&dir_handle, sizeof(*handle));