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Sun, 16 Oct 2022 12:59:47 +0000 (GMT) Received: from tarunpc.ibmuc.com (unknown [9.43.63.52]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Sun, 16 Oct 2022 12:59:47 +0000 (GMT) From: Tarun Sahu To: ltp@lists.linux.it Date: Sun, 16 Oct 2022 18:27:31 +0530 Message-Id: <20221016125731.249078-30-tsahu@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20221016125731.249078-1-tsahu@linux.ibm.com> References: <20221016125731.249078-1-tsahu@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: BrooXyHoPLD8_YqCsB8o1qrF5wds2lUb X-Proofpoint-ORIG-GUID: BrooXyHoPLD8_YqCsB8o1qrF5wds2lUb X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-10-16_09,2022-10-14_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 mlxlogscore=997 impostorscore=0 bulkscore=0 malwarescore=0 lowpriorityscore=0 priorityscore=1501 adultscore=0 spamscore=0 clxscore=1015 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2210160070 X-Virus-Scanned: clamav-milter 0.102.4 at in-3.smtp.seeweb.it X-Virus-Status: Clean Subject: [LTP] [PATCH 29/29] Hugetlb: Migrating libhugetlbfs shm-fork X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: aneesh.kumar@linux.ibm.com, sbhat@linux.ibm.com, vaibhav@linux.ibm.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" Migrating the libhugetlbfs/testcases/shm-fork.c test Test Description: Test shared memory behavior when multiple threads are Test shared memory behavior when multiple threads are attached to a segment. A segment is created and then children are spawned which attach, write, read (verify), and detach from the shared memory segment. Signed-off-by: Tarun Sahu --- runtest/hugetlb | 1 + testcases/kernel/mem/.gitignore | 1 + .../kernel/mem/hugetlb/hugefork/hugefork02.c | 196 ++++++++++++++++++ 3 files changed, 198 insertions(+) create mode 100644 testcases/kernel/mem/hugetlb/hugefork/hugefork02.c diff --git a/runtest/hugetlb b/runtest/hugetlb index 2088df636..28dc487a4 100644 --- a/runtest/hugetlb +++ b/runtest/hugetlb @@ -2,6 +2,7 @@ hugefallocate01 hugefallocate01 hugefallocate02 hugefallocate02 hugefork01 hugefork01 +hugefork02 hugefork02 -P 3 -s 5 hugemmap01 hugemmap01 hugemmap02 hugemmap02 diff --git a/testcases/kernel/mem/.gitignore b/testcases/kernel/mem/.gitignore index 81b9f547c..20b60b1a1 100644 --- a/testcases/kernel/mem/.gitignore +++ b/testcases/kernel/mem/.gitignore @@ -2,6 +2,7 @@ /hugetlb/hugefallocate/hugefallocate01 /hugetlb/hugefallocate/hugefallocate02 /hugetlb/hugefork/hugefork01 +/hugetlb/hugefork/hugefork02 /hugetlb/hugemmap/hugemmap01 /hugetlb/hugemmap/hugemmap02 /hugetlb/hugemmap/hugemmap04 diff --git a/testcases/kernel/mem/hugetlb/hugefork/hugefork02.c b/testcases/kernel/mem/hugetlb/hugefork/hugefork02.c new file mode 100644 index 000000000..16e41486b --- /dev/null +++ b/testcases/kernel/mem/hugetlb/hugefork/hugefork02.c @@ -0,0 +1,196 @@ +// SPDX-License-Identifier: LGPL-2.1-or-later +/* + * Copyright (C) 2005-2006 David Gibson & Adam Litke, IBM Corporation. + * + * Test Name: Private Mapping + * + * Test Description: Test shared memory behavior when multiple threads are + * Test shared memory behavior when multiple threads are attached + * to a segment. A segment is created and then children are + * spawned which attach, write, read (verify), and detach from the + * shared memory segment. + * + * HISTORY + * Written by David Gibson & Adam Litke + * + */ + +#define _GNU_SOURCE +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "tst_safe_sysv_ipc.h" +#include "hugetlb.h" + +static int nr_hugepages; +static int numprocs; +static int shmid = -1; + +#define MAX_PROCS 200 +#define BUF_SZ 256 + +#define CHILD_FAIL(thread, fmt, ...) \ + do { \ + if (verbose) \ + tst_res(TINFO, "Thread %d (pid=%d) FAIL: " fmt, \ + thread, getpid(), ##__VA_ARGS__); \ + exit(1); \ + } while (0) + +static char *verbose; +static char hfile[MAXPATHLEN]; +static long hpage_size; +static int numprocs; +static char *numprocs_opt; + +static void do_child(int thread, unsigned long size) +{ + volatile char *shmaddr; + int j; + unsigned long k; + + for (j = 0; j < 5; j++) { + shmaddr = shmat(shmid, 0, SHM_RND); + if (shmaddr == MAP_FAILED) + CHILD_FAIL(thread, "shmat() failed"); + + for (k = 0; k < size; k++) + shmaddr[k] = (char) (k); + for (k = 0; k < size; k++) + if (shmaddr[k] != (char)k) + CHILD_FAIL(thread, "Index %lu mismatch", k); + + if (shmdt((const void *)shmaddr) != 0) + CHILD_FAIL(thread, "shmdt() failed: %s", + strerror(errno)); + } + exit(0); +} + +static void check_hugetlb_shm_group(void) +{ + int fd; + char gid_buffer[64] = {0}; + gid_t hugetlb_shm_group; + gid_t gid = getgid(); + uid_t uid = getuid(); + + /* root is an exception */ + if (uid == 0) + return; + + fd = SAFE_OPEN("/proc/sys/vm/hugetlb_shm_group", O_RDONLY); + SAFE_READ(0, fd, &gid_buffer, sizeof(gid_buffer)); + hugetlb_shm_group = atoi(gid_buffer); + SAFE_CLOSE(fd); + if (hugetlb_shm_group != gid) + tst_brk(TCONF, "Do not have permission to use SHM_HUGETLB"); +} + +static void run_test(void) +{ + unsigned long size; + int pid, status; + int i; + int wait_list[MAX_PROCS]; + + check_hugetlb_shm_group(); + + size = hpage_size * nr_hugepages; + if (verbose) + tst_res(TINFO, "Requesting %lu bytes\n", size); + + shmid = shmget(2, size, SHM_HUGETLB|IPC_CREAT|SHM_R|SHM_W); + if (shmid < 0) { + tst_res(TFAIL|TERRNO, "shmget()"); + goto fail; + } + + if (verbose) { + tst_res(TINFO, "shmid: %d\n", shmid); + tst_res(TINFO, "Spawning children:\n"); + } + for (i = 0; i < numprocs; i++) { + pid = SAFE_FORK(); + + if (pid == 0) + do_child(i, size); + + wait_list[i] = pid; + } + + for (i = 0; i < numprocs; i++) { + SAFE_WAITPID(wait_list[i], &status, 0); + if (WEXITSTATUS(status) != 0) { + tst_res(TFAIL, "Thread %d (pid=%d) failed", i, wait_list[i]); + goto fail; + } + if (WIFSIGNALED(status)) { + tst_res(TFAIL, "Thread %d (pid=%d) received unhandled signal", + i, wait_list[i]); + goto fail; + } + } + + tst_res(TPASS, "Successful"); + return; + +fail: + tst_brk(TBROK, "Once failed, No point in continuing the test"); +} + +static void setup(void) +{ + if (!Hopt) + Hopt = tst_get_tmpdir(); + SAFE_MOUNT("none", Hopt, "hugetlbfs", 0, NULL); + + snprintf(hfile, sizeof(hfile), "%s/ltp_mmapfile%d", Hopt, getpid()); + + hpage_size = SAFE_READ_MEMINFO("Hugepagesize:")*1024; + + if (!(numprocs_opt) || !(nr_opt)) + tst_brk(TCONF, "Usage: -P <# procs> -s <# pages>"); + + tst_parse_int(numprocs_opt, &numprocs, 1, INT_MAX); + tst_parse_int(nr_opt, &nr_hugepages, 1, INT_MAX); + + if (numprocs > MAX_PROCS) + tst_brk(TCONF, "Cannot spawn more than %d processes", MAX_PROCS); + + if ((unsigned long)nr_hugepages > tst_hugepages) + tst_brk(TCONF, "Not enough hugepages available only %lu max", + tst_hugepages); +} + +static void cleanup(void) +{ + if (shmid >= 0) + SAFE_SHMCTL(shmid, IPC_RMID, NULL); + umount2(Hopt, MNT_DETACH); +} + +static struct tst_test test = { + .needs_root = 1, + .needs_tmpdir = 1, + .options = (struct tst_option[]) { + {"v", &verbose, "Turns on verbose mode"}, + {"P:", &numprocs_opt, "Num of process to run in parallel"}, + {"H:", &Hopt, "Location of hugetlbfs, i.e. -H /var/hugetlbfs"}, + {"s:", &nr_opt, "Set the number of the been allocated hugepages"}, + {} + }, + .forks_child = 1, + .setup = setup, + .cleanup = cleanup, + .test_all = run_test, + .hugepages = {5, TST_REQUEST}, +}; -- 2.31.1 -- Mailing list info: https://lists.linux.it/listinfo/ltp