From owner-svn-src-head@freebsd.org Fri Sep 4 01:02:22 2015 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 65B0D9C9CCE; Fri, 4 Sep 2015 01:02:22 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4B75EE83; Fri, 4 Sep 2015 01:02:22 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.70]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id t8412MBi055231; Fri, 4 Sep 2015 01:02:22 GMT (envelope-from jhb@FreeBSD.org) Received: (from jhb@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id t8412M42055230; Fri, 4 Sep 2015 01:02:22 GMT (envelope-from jhb@FreeBSD.org) Message-Id: <201509040102.t8412M42055230@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: jhb set sender to jhb@FreeBSD.org using -f From: John Baldwin Date: Fri, 4 Sep 2015 01:02:22 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r287448 - head/tests/sys/vm X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Sep 2015 01:02:22 -0000 Author: jhb Date: Fri Sep 4 01:02:21 2015 New Revision: 287448 URL: https://svnweb.freebsd.org/changeset/base/287448 Log: Add more mmap tests related to character devices. - Add cdev-related tests for bad args. - Add two simple tests cases for mapping /dev/zero that test for MAP_ANON-like behavior. Reviewed by: alc, kib MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D3323 Modified: head/tests/sys/vm/mmap_test.c Modified: head/tests/sys/vm/mmap_test.c ============================================================================== --- head/tests/sys/vm/mmap_test.c Fri Sep 4 00:42:05 2015 (r287447) +++ head/tests/sys/vm/mmap_test.c Fri Sep 4 01:02:21 2015 (r287448) @@ -110,23 +110,31 @@ checked_mmap(int prot, int flags, int fd ATF_TC_WITHOUT_HEAD(mmap__bad_arguments); ATF_TC_BODY(mmap__bad_arguments, tc) { - int fd; + int devstatfd, shmfd, zerofd; - ATF_REQUIRE((fd = shm_open(SHM_ANON, O_RDWR, 0644)) >= 0); - ATF_REQUIRE(ftruncate(fd, getpagesize()) == 0); + ATF_REQUIRE((devstatfd = open("/dev/devstat", O_RDONLY)) >= 0); + ATF_REQUIRE((shmfd = shm_open(SHM_ANON, O_RDWR, 0644)) >= 0); + ATF_REQUIRE(ftruncate(shmfd, getpagesize()) == 0); + ATF_REQUIRE((zerofd = open("/dev/zero", O_RDONLY)) >= 0); /* These should work. */ checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON, -1, 0, "simple MAP_ANON"); - checked_mmap(PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0, + checked_mmap(PROT_READ | PROT_WRITE, MAP_SHARED, shmfd, 0, "simple shm fd shared"); - checked_mmap(PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0, + checked_mmap(PROT_READ | PROT_WRITE, MAP_PRIVATE, shmfd, 0, "simple shm fd private"); + checked_mmap(PROT_READ, MAP_SHARED, zerofd, 0, + "simple /dev/zero shared"); + checked_mmap(PROT_READ | PROT_WRITE, MAP_PRIVATE, zerofd, 0, + "simple /dev/zero private"); + checked_mmap(PROT_READ, MAP_SHARED, devstatfd, 0, + "simple /dev/devstat shared"); /* Extra PROT flags. */ checked_mmap(PROT_READ | PROT_WRITE | 0x100000, MAP_ANON, -1, EINVAL, "MAP_ANON with extra PROT flags"); - checked_mmap(0xffff, MAP_SHARED, fd, EINVAL, + checked_mmap(0xffff, MAP_SHARED, shmfd, EINVAL, "shm fd with garbage PROT"); /* Undefined flag. */ @@ -136,11 +144,11 @@ ATF_TC_BODY(mmap__bad_arguments, tc) /* Both MAP_SHARED and MAP_PRIVATE */ checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE | MAP_SHARED, -1, EINVAL, "MAP_ANON with both SHARED and PRIVATE"); - checked_mmap(PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_SHARED, fd, + checked_mmap(PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_SHARED, shmfd, EINVAL, "shm fd with both SHARED and PRIVATE"); /* At least one of MAP_SHARED or MAP_PRIVATE without ANON */ - checked_mmap(PROT_READ | PROT_WRITE, 0, fd, EINVAL, + checked_mmap(PROT_READ | PROT_WRITE, 0, shmfd, EINVAL, "shm fd without sharing flag"); /* MAP_ANON with either sharing flag (impacts fork). */ @@ -152,6 +160,91 @@ ATF_TC_BODY(mmap__bad_arguments, tc) /* MAP_ANON should require an fd of -1. */ checked_mmap(PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, 0, EINVAL, "MAP_ANON with fd != -1"); + + /* Writable MAP_SHARED should fail on read-only descriptors. */ + checked_mmap(PROT_READ | PROT_WRITE, MAP_SHARED, zerofd, EACCES, + "MAP_SHARED of read-only /dev/zero"); + + /* + * Character devices other than /dev/zero do not support private + * mappings. + */ + checked_mmap(PROT_READ, MAP_PRIVATE, devstatfd, EINVAL, + "MAP_PRIVATE of /dev/devstat"); +} + +ATF_TC_WITHOUT_HEAD(mmap__dev_zero_private); +ATF_TC_BODY(mmap__dev_zero_private, tc) +{ + char *p1, *p2, *p3; + size_t i; + int fd; + + ATF_REQUIRE((fd = open("/dev/zero", O_RDONLY)) >= 0); + + p1 = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, + 0); + ATF_REQUIRE(p1 != MAP_FAILED); + + p2 = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, + 0); + ATF_REQUIRE(p2 != MAP_FAILED); + + for (i = 0; i < getpagesize(); i++) + ATF_REQUIRE_EQ_MSG(0, p1[i], "byte at p1[%zu] is %x", i, p1[i]); + + ATF_REQUIRE(memcmp(p1, p2, getpagesize()) == 0); + + p1[0] = 1; + + ATF_REQUIRE(p2[0] == 0); + + p2[0] = 2; + + ATF_REQUIRE(p1[0] == 1); + + p3 = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, + 0); + ATF_REQUIRE(p3 != MAP_FAILED); + + ATF_REQUIRE(p3[0] == 0); +} + +ATF_TC_WITHOUT_HEAD(mmap__dev_zero_shared); +ATF_TC_BODY(mmap__dev_zero_shared, tc) +{ + char *p1, *p2, *p3; + size_t i; + int fd; + + ATF_REQUIRE((fd = open("/dev/zero", O_RDWR)) >= 0); + + p1 = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE, MAP_SHARED, fd, + 0); + ATF_REQUIRE(p1 != MAP_FAILED); + + p2 = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE, MAP_SHARED, fd, + 0); + ATF_REQUIRE(p2 != MAP_FAILED); + + for (i = 0; i < getpagesize(); i++) + ATF_REQUIRE_EQ_MSG(0, p1[i], "byte at p1[%zu] is %x", i, p1[i]); + + ATF_REQUIRE(memcmp(p1, p2, getpagesize()) == 0); + + p1[0] = 1; + + ATF_REQUIRE(p2[0] == 0); + + p2[0] = 2; + + ATF_REQUIRE(p1[0] == 1); + + p3 = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE, MAP_SHARED, fd, + 0); + ATF_REQUIRE(p3 != MAP_FAILED); + + ATF_REQUIRE(p3[0] == 0); } ATF_TP_ADD_TCS(tp) @@ -159,6 +252,8 @@ ATF_TP_ADD_TCS(tp) ATF_TP_ADD_TC(tp, mmap__map_at_zero); ATF_TP_ADD_TC(tp, mmap__bad_arguments); + ATF_TP_ADD_TC(tp, mmap__dev_zero_private); + ATF_TP_ADD_TC(tp, mmap__dev_zero_shared); return (atf_no_error()); }