From patchwork Thu May 25 13:51:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adhemerval Zanella Netto X-Patchwork-Id: 70078 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 173243858414 for ; Thu, 25 May 2023 13:51:45 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 173243858414 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1685022705; bh=98HnhY7+HDksYzwkWJN1ndK1aB4iCK6CtNb7xoVxIqk=; h=To:Subject:Date:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=V/8Gk1Co+9uXLWMnYvsJthToHum8vMDq72xaxvbyzbdOUVduWwREck891LLHbfPXJ 7hRFtSgcFjihG9H4XqSKNkbW01KSKaYUwp9jlGhds5reQpvCkffSVOeBpoVRlUJyUS 1UX8TqDpsydRP7iGnZt0MZ5m+n5tLJc7Kze/yjB8= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mail-ot1-x32e.google.com (mail-ot1-x32e.google.com [IPv6:2607:f8b0:4864:20::32e]) by sourceware.org (Postfix) with ESMTPS id D9E413858D32 for ; Thu, 25 May 2023 13:51:20 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org D9E413858D32 Received: by mail-ot1-x32e.google.com with SMTP id 46e09a7af769-6af6f309613so691008a34.0 for ; Thu, 25 May 2023 06:51:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685022679; x=1687614679; h=content-transfer-encoding:mime-version:message-id:date:subject:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=98HnhY7+HDksYzwkWJN1ndK1aB4iCK6CtNb7xoVxIqk=; b=bRuXhoYWi2HN2xTxTGoZzf/J7PKsKpkn4y4n7wr4M3QfJ90tu+xizo0chk3lBF3wXf GYwSmeTzIzUwtUpGJ7Kf1d/dS8yV3KDdJ4fudZEUfwRWngrPHFSlCEXqYTPF/SUgOq29 mNi3dlQoGRgZ1S1eX1ewKd5zFjYk+GKwlPUDX+JCf5DFnSuHM5mteB32cwAE/G/qus+o OZmv5zAv1HVcwbrp+ox0j4NJ82x7r+PHawOfnSxDUSaE09YNQNZpXjL3mqHdErUaRghE 3+E6fPHQOs+EnQlw7PT80s5bHuol8g3RoMFyvWrUpAJVo70PETxx3nNJIZ8X/wk7ab4j Z7LQ== X-Gm-Message-State: AC+VfDxevyPkzAGpzvZxZw99C1tycxoRX67shlQySb43UONIwzQ6gceE oaMr9rneFIVGoZHscEUT3SFrQT6c3Yg7mW82UPL/IA== X-Google-Smtp-Source: ACHHUZ4Gj75K6qaH1EPXEmARW+qb6dgbBGsC/R/s1+I5HTNqMaKNfGTzx99VCiFzxjsWHYfb8dCHuQ== X-Received: by 2002:a9d:76d5:0:b0:6af:8344:28a with SMTP id p21-20020a9d76d5000000b006af8344028amr1223247otl.17.1685022679443; Thu, 25 May 2023 06:51:19 -0700 (PDT) Received: from mandiga.. ([2804:1b3:a7c1:4dd5:1f:68d0:3218:bdf0]) by smtp.gmail.com with ESMTPSA id f20-20020a9d6c14000000b006adda5cddb7sm619851otq.62.2023.05.25.06.51.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 May 2023 06:51:18 -0700 (PDT) To: libc-alpha@sourceware.org, Bo YU Subject: [PATCH v2] io: Fix record locking contants on 32 bit arch with 64 bit default time_t (BZ#30477) Date: Thu, 25 May 2023 10:51:15 -0300 Message-Id: <20230525135115.1858505-1-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-12.9 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Adhemerval Zanella via Libc-alpha From: Adhemerval Zanella Netto Reply-To: Adhemerval Zanella Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" For architecture with default 64 bit time_t support, the kernel does not provide LFS and non-LFS values for F_GETLK, F_GETLK, and F_GETLK (the default value used for 64 bit architecture are used). This is might be considered an ABI break, but the currenct exported values is bogus anyway. The POSIX lockf is not affected since it is aliased to lockf64, which already uses the LFS values. Checked on i686-linux-gnu and the new tests on a riscv32. Reviewed-by: Carlos O'Donell --- Changes from v1: * Remove parens on defined operator. * Make the test use tst-flock skeleton. --- io/Makefile | 1 + io/tst-fcntl-lock.c | 97 ++++++++++++++++++++++ io/tst-lockf.c | 58 +++++++------ sysdeps/unix/sysv/linux/bits/fcntl-linux.h | 2 +- 4 files changed, 133 insertions(+), 25 deletions(-) create mode 100644 io/tst-fcntl-lock.c diff --git a/io/Makefile b/io/Makefile index db886ca26f..d573064ecc 100644 --- a/io/Makefile +++ b/io/Makefile @@ -175,6 +175,7 @@ tests := \ tst-fchmodat \ tst-fchownat \ tst-fcntl \ + tst-fcntl-lock \ tst-fstatat \ tst-fts \ tst-fts-lfs \ diff --git a/io/tst-fcntl-lock.c b/io/tst-fcntl-lock.c new file mode 100644 index 0000000000..357c4b7b56 --- /dev/null +++ b/io/tst-fcntl-lock.c @@ -0,0 +1,97 @@ +/* Test for advisory record locking. + Copyright (C) 2023 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License + as published by the Free Software Foundation; either version 2 + of the License, or (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, see . +*/ + +#include +#include +#include + +/* This is essentially the POSIX lockf. */ + +static int +fcntl_lockf (int fd, int cmd, off_t len) +{ + struct flock fl = { + .l_type = F_WRLCK, + .l_whence = SEEK_CUR, + .l_len = len + }; + + switch (cmd) + { + case F_TEST: + fl.l_type = F_RDLCK; + if (fcntl (fd, F_GETLK, &fl) < 0) + return -1; + if (fl.l_type == F_UNLCK || fl.l_pid == getpid ()) + return 0; + errno = EACCES; + return -1; + + case F_ULOCK: + fl.l_type = F_UNLCK; + return fcntl (fd, F_SETLK, &fl); + + case F_LOCK: + return fcntl (fd, F_SETLKW, &fl); + + case F_TLOCK: + return fcntl (fd, F_SETLK, &fl); + } + + errno = EINVAL; + return -1; +} + +static int +fcntl64_lockf (int fd, int cmd, off64_t len64) + { + struct flock64 fl64 = { + .l_type = F_WRLCK, + .l_whence = SEEK_CUR, + .l_len = len64 + }; + + switch (cmd) + { + case F_TEST: + fl64.l_type = F_RDLCK; + if (fcntl64 (fd, F_GETLK64, &fl64) < 0) + return -1; + if (fl64.l_type == F_UNLCK || fl64.l_pid == getpid ()) + return 0; + errno = EACCES; + return -1; + + case F_ULOCK: + fl64.l_type = F_UNLCK; + return fcntl64 (fd, F_SETLK64, &fl64); + + case F_LOCK: + return fcntl64 (fd, F_SETLKW64, &fl64); + + case F_TLOCK: + return fcntl64 (fd, F_SETLK64, &fl64); + } + + errno = EINVAL; + return -1; +} + +#define TST_LOCKFD "tst-fcntl-lock." +#define LOCKF fcntl_lockf +#define LOCKF64 fcntl64_lockf +#include "tst-lockf.c" diff --git a/io/tst-lockf.c b/io/tst-lockf.c index eda04b5417..cf8d3001c3 100644 --- a/io/tst-lockf.c +++ b/io/tst-lockf.c @@ -24,13 +24,23 @@ #include #include +#ifndef TST_LOCKFD +# define TST_LOCKFD "tst-lockfd." +#endif +#ifndef LOCKF +# define LOCKF lockf +#endif +#ifndef LOCKF64 +# define LOCKF64 lockf64 +#endif + static char *temp_filename; static int temp_fd; static void do_prepare (int argc, char **argv) { - temp_fd = create_temp_file ("tst-lockfd.", &temp_filename); + temp_fd = create_temp_file (TST_LOCKFD, &temp_filename); TEST_VERIFY_EXIT (temp_fd != -1); } #define PREPARE do_prepare @@ -40,22 +50,22 @@ do_test_child_lockf (void *closure) { /* Check if parent has [0, 1024) locked. */ TEST_COMPARE (lseek (temp_fd, 0, SEEK_SET), 0); - TEST_COMPARE (lockf (temp_fd, F_TLOCK, 1024), -1); + TEST_COMPARE (LOCKF (temp_fd, F_TLOCK, 1024), -1); TEST_COMPARE (errno, EAGAIN); - TEST_COMPARE (lockf (temp_fd, F_TEST, 1024), -1); + TEST_COMPARE (LOCKF (temp_fd, F_TEST, 1024), -1); TEST_COMPARE (errno, EACCES); /* Also Check if parent has last 1024 bytes locked. */ TEST_COMPARE (lseek (temp_fd, INT32_MAX-1024, SEEK_SET), INT32_MAX-1024); - TEST_COMPARE (lockf (temp_fd, F_TEST, 1024), -1); + TEST_COMPARE (LOCKF (temp_fd, F_TEST, 1024), -1); /* And try to lock [1024, 2048). */ TEST_COMPARE (lseek (temp_fd, 1024, SEEK_SET), 1024); - TEST_COMPARE (lockf (temp_fd, F_LOCK, 1024), 0); + TEST_COMPARE (LOCKF (temp_fd, F_LOCK, 1024), 0); /* Check if non-LFS interface cap access to 32-bif off_t. */ TEST_COMPARE (lseek64 (temp_fd, (off64_t)INT32_MAX, SEEK_SET), (off64_t)INT32_MAX); - TEST_COMPARE (lockf64 (temp_fd, F_TEST, 1024), 0); + TEST_COMPARE (LOCKF64 (temp_fd, F_TEST, 1024), 0); } static void @@ -63,32 +73,32 @@ do_test_child_lockf64 (void *closure) { /* Check if parent has [0, 1024) locked. */ TEST_COMPARE (lseek64 (temp_fd, 0, SEEK_SET), 0); - TEST_COMPARE (lockf64 (temp_fd, F_TLOCK, 1024), -1); + TEST_COMPARE (LOCKF64 (temp_fd, F_TLOCK, 1024), -1); TEST_COMPARE (errno, EAGAIN); - TEST_COMPARE (lockf64 (temp_fd, F_TEST, 1024), -1); + TEST_COMPARE (LOCKF64 (temp_fd, F_TEST, 1024), -1); TEST_COMPARE (errno, EACCES); /* Also Check if parent has last 1024 bytes locked. */ TEST_COMPARE (lseek64 (temp_fd, INT32_MAX-1024, SEEK_SET), INT32_MAX-1024); - TEST_COMPARE (lockf64 (temp_fd, F_TEST, 1024), -1); + TEST_COMPARE (LOCKF64 (temp_fd, F_TEST, 1024), -1); /* And try to lock [1024, 2048). */ TEST_COMPARE (lseek64 (temp_fd, 1024, SEEK_SET), 1024); - TEST_COMPARE (lockf64 (temp_fd, F_LOCK, 1024), 0); + TEST_COMPARE (LOCKF64 (temp_fd, F_LOCK, 1024), 0); /* And also [INT32_MAX, INT32_MAX+1024). */ { off64_t off = (off64_t)INT32_MAX; TEST_COMPARE (lseek64 (temp_fd, off, SEEK_SET), off); - TEST_COMPARE (lockf64 (temp_fd, F_LOCK, 1024), 0); + TEST_COMPARE (LOCKF64 (temp_fd, F_LOCK, 1024), 0); } /* Check if [INT32_MAX+1024, INT64_MAX) is locked. */ { off64_t off = (off64_t)INT32_MAX+1024; TEST_COMPARE (lseek64 (temp_fd, off, SEEK_SET), off); - TEST_COMPARE (lockf64 (temp_fd, F_TLOCK, 1024), -1); + TEST_COMPARE (LOCKF64 (temp_fd, F_TLOCK, 1024), -1); TEST_COMPARE (errno, EAGAIN); - TEST_COMPARE (lockf64 (temp_fd, F_TEST, 1024), -1); + TEST_COMPARE (LOCKF64 (temp_fd, F_TEST, 1024), -1); TEST_COMPARE (errno, EACCES); } } @@ -97,38 +107,38 @@ static int do_test (void) { /* Basic tests to check if a lock can be obtained and checked. */ - TEST_COMPARE (lockf (temp_fd, F_LOCK, 1024), 0); - TEST_COMPARE (lockf (temp_fd, F_LOCK, INT32_MAX), 0); - TEST_COMPARE (lockf (temp_fd, F_TLOCK, 1024), 0); - TEST_COMPARE (lockf (temp_fd, F_TEST, 1024), 0); + TEST_COMPARE (LOCKF (temp_fd, F_LOCK, 1024), 0); + TEST_COMPARE (LOCKF (temp_fd, F_LOCK, INT32_MAX), 0); + TEST_COMPARE (LOCKF (temp_fd, F_TLOCK, 1024), 0); + TEST_COMPARE (LOCKF (temp_fd, F_TEST, 1024), 0); TEST_COMPARE (lseek (temp_fd, 1024, SEEK_SET), 1024); - TEST_COMPARE (lockf (temp_fd, F_ULOCK, 1024), 0); + TEST_COMPARE (LOCKF (temp_fd, F_ULOCK, 1024), 0); /* Parent process should have ([0, 1024), [2048, INT32_MAX)) ranges locked. */ { struct support_capture_subprocess result; result = support_capture_subprocess (do_test_child_lockf, NULL); - support_capture_subprocess_check (&result, "lockf", 0, sc_allow_none); + support_capture_subprocess_check (&result, "LOCKF", 0, sc_allow_none); } if (sizeof (off_t) != sizeof (off64_t)) { /* Check if previously locked regions with LFS symbol. */ TEST_COMPARE (lseek (temp_fd, 0, SEEK_SET), 0); - TEST_COMPARE (lockf64 (temp_fd, F_LOCK, 1024), 0); - TEST_COMPARE (lockf64 (temp_fd, F_TLOCK, 1024), 0); - TEST_COMPARE (lockf64 (temp_fd, F_TEST, 1024), 0); + TEST_COMPARE (LOCKF64 (temp_fd, F_LOCK, 1024), 0); + TEST_COMPARE (LOCKF64 (temp_fd, F_TLOCK, 1024), 0); + TEST_COMPARE (LOCKF64 (temp_fd, F_TEST, 1024), 0); /* Lock region [INT32_MAX+1024, INT64_MAX). */ off64_t off = (off64_t)INT32_MAX + 1024; TEST_COMPARE (lseek64 (temp_fd, off, SEEK_SET), off); - TEST_COMPARE (lockf64 (temp_fd, F_LOCK, 1024), 0); + TEST_COMPARE (LOCKF64 (temp_fd, F_LOCK, 1024), 0); /* Parent process should have ([0, 1024), [2048, INT32_MAX), [INT32_MAX+1024, INT64_MAX)) ranges locked. */ { struct support_capture_subprocess result; result = support_capture_subprocess (do_test_child_lockf64, NULL); - support_capture_subprocess_check (&result, "lockf", 0, sc_allow_none); + support_capture_subprocess_check (&result, "LOCKF", 0, sc_allow_none); } } diff --git a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h index ca6a0d7516..1babbdc84e 100644 --- a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h +++ b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h @@ -101,7 +101,7 @@ #endif #ifndef F_GETLK -# ifndef __USE_FILE_OFFSET64 +# if !defined __USE_FILE_OFFSET64 && __TIMESIZE != 64 # define F_GETLK 5 /* Get record locking info. */ # define F_SETLK 6 /* Set record locking info (non-blocking). */ # define F_SETLKW 7 /* Set record locking info (blocking). */