Because of some issues in kernel code "fault in pages readable"
functionality may be broken (for example it is broken in
linux-2.6.22-rc4-mm2, http://lkml.org/lkml/2007/6/13/84).
This testcase perform basic checks for this functionality.
Signed-off-by: Dmitriy Monakhov <[EMAIL PROTECTED]>
---
testcases/kernel/syscalls/writev/writev06.c | 268 +++++++++++++++++++++++++++
1 files changed, 268 insertions(+), 0 deletions(-)
create mode 100644 testcases/kernel/syscalls/writev/writev06.c
diff --git a/testcases/kernel/syscalls/writev/writev06.c
b/testcases/kernel/syscalls/writev/writev06.c
new file mode 100644
index 0000000..9080804
--- /dev/null
+++ b/testcases/kernel/syscalls/writev/writev06.c
@@ -0,0 +1,268 @@
+/*
+ *
+ * Copyright (C) 2007 Monakhov Dmitriy
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/*
+ * NAME
+ * writev06.c
+ *
+ * DESCRIPTION
+ * These testcases are written to test fault in pages readable
+ * feature in generic write path. Because before actual write
+ * kernel may want check is buffer passed is realy readable.
+ *
+ * USAGE: <for command-line>
+ * writev06 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
+ * where, -c n : Run n copies concurrently.
+ * -e : Turn on errno logging.
+ * -i n : Execute test n times.
+ * -I x : Execute test for x seconds.
+ * -P x : Pause for x seconds between iterations.
+ * -t : Turn on syscall timing.
+ *
+ * History
+ *
+ * Restrictions
+ * NONE
+ */
+
+#include <sys/types.h>
+#include <signal.h>
+#include <sys/uio.h>
+#include <fcntl.h>
+#include <memory.h>
+#include <errno.h>
+#include <test.h>
+#include <usctest.h>
+#include <sys/mman.h>
+
+#define K_1 1024
+#define NBUFS 2
+#define MAX_IOVEC 2
+#define DATA_FILE "writev_data_file"
+
+int page_size;
+
+char * good_addr[2] = {NULL, NULL};
+char * bad_addr[2] = {NULL, NULL};
+
+struct iovec wr_iovec[MAX_IOVEC] = {
+ {(caddr_t)-1, 1},
+ {(caddr_t)-1, 1}
+};
+
+/* 0 terminated list of expected errnos */
+int exp_enos[] = {0};
+
+char name[K_1], f_name[K_1];
+int fd[2], in_sighandler;
+
+char *TCID = "writev06";
+int TST_TOTAL = 1;
+extern int Tst_count;
+
+void sighandler(int);
+void setup(void);
+void cleanup(void);
+int fail;
+
+int main(int argc, char **argv)
+{
+ int lc; /* loop counter */
+ char *msg; /* message returned from parse_opts */
+
+ /* parse standard options */
+ if ((msg = parse_opts(argc, argv, (option_t *)NULL, NULL)) !=
+ (char *) NULL) {
+ tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
+ /*NOTREACHED*/
+ }
+
+ setup(); /* set "tstdir", and "testfile" vars */
+
+ /* The following loop checks looping state if -i option given */
+ for (lc = 0; TEST_LOOPING(lc); lc++) {
+
+ /* reset Tst_count in case we are looping */
+ Tst_count = 0;
+
+ fd[1] = -1; /* Invalid file descriptor */
+
+ if (signal(SIGTERM, sighandler) == SIG_ERR) {
+ perror("signal");
+ tst_resm(TFAIL, "signal() SIGTERM FAILED");
+ cleanup();
+ /*NOTREACHED*/
+ }
+
+ if (signal(SIGPIPE, sighandler) == SIG_ERR) {
+ perror("signal");
+ tst_resm(TFAIL, "signal() SIGPIPE FAILED");
+ cleanup();
+ /*NOTREACHED*/
+ }
+
+ if ((fd[0] = open(f_name, O_WRONLY | O_CREAT, 0666)) < 0) {
+ tst_resm(TFAIL, "open(2) failed: fname = %s, "
+ "errno = %d", f_name, errno);
+ cleanup();
+ /*NOTREACHED*/
+ }
+
+ /*
+ * Iovecs passed to writev points to valid (readable) regions,
+ * so all bytes must be successfully written.
+ */
+//block1:
+
+ tst_resm(TINFO, "Enter block 1");
+ fail = 0;
+
+ TEST(writev(fd[0], wr_iovec, 2));
+ if (TEST_RETURN >= 0) {
+ if (TEST_RETURN == 2) {
+ tst_resm(TINFO, "writev returned %d as expected"
+ , 2);
+ } else {
+ tst_resm(TFAIL, "Expected nbytes = %d, got "
+ "%d", 2, TEST_RETURN);
+ fail = 1;
+ }
+ } else {
+ TEST_ERROR_LOG(TEST_ERRNO);
+ tst_resm(TFAIL, "Error writev return value = %d,"
+ " errno = %d", TEST_RETURN,
+ TEST_ERRNO);
+ fail = 1;
+ }
+ if (fail) {
+ tst_resm(TINFO, "block 1 FAILED");
+ } else {
+ tst_resm(TINFO, "block 1 PASSED");
+ }
+ tst_resm(TINFO, "Exit block 1");
+ }
+ cleanup();
+ return(0);
+}
+
+/*
+ * setup()
+ * performs all ONE TIME setup for this test
+ */
+void
+setup(void)
+{
+ /* capture signals */
+ tst_sig(FORK, DEF_HANDLER, cleanup);
+
+ /* Set up the expected error numbers for -e option */
+ TEST_EXP_ENOS(exp_enos);
+
+ /* Pause if that option was specified.
+ * TEST_PAUSE contains the code to fork the test with the -i option.
+ * You want to make sure you do this before you create your temporary
+ * directory.
+ */
+ TEST_PAUSE;
+
+ /* Create a unique temporary directory and chdir() to it. */
+ tst_tmpdir();
+
+ strcpy(name, DATA_FILE);
+ sprintf(f_name, "%s.%d", name, getpid());
+
+ page_size = getpagesize();
+
+ /* Crate two readable and writeble mappings with non reabable
+ * mapping around */
+ bad_addr[0] = mmap(NULL, page_size * 3, PROT_NONE,
+ MAP_PRIVATE_EXCEPT_UCLINUX|MAP_ANONYMOUS, 0, 0);
+ good_addr[0] = mmap(NULL, page_size, PROT_READ|PROT_WRITE,
+ MAP_PRIVATE_EXCEPT_UCLINUX|MAP_ANONYMOUS, 0, 0);
+ bad_addr[1] = mmap(NULL, page_size * 3, PROT_NONE,
+ MAP_PRIVATE_EXCEPT_UCLINUX|MAP_ANONYMOUS, 0, 0);
+ good_addr[1] = mmap(NULL, page_size, PROT_READ|PROT_WRITE,
+ MAP_PRIVATE_EXCEPT_UCLINUX|MAP_ANONYMOUS, 0, 0);
+ bad_addr[2] = mmap(NULL, page_size * 3, PROT_NONE,
+ MAP_PRIVATE_EXCEPT_UCLINUX|MAP_ANONYMOUS, 0, 0);
+
+ if (good_addr[0] <= 0 || good_addr[1] <= 0 ||
+ bad_addr[0] <= 0 || bad_addr[0] <= 0 ||
+ bad_addr[2] <= 0) {
+ printf("mmap failed\n");
+ }
+
+ /* force page fault for writable mappings*/
+ memset(good_addr[0],'a', page_size);
+ memset(good_addr[1],'b', page_size);
+
+ wr_iovec[0].iov_base = good_addr[0] + page_size - 1;
+ wr_iovec[1].iov_base = good_addr[1] + page_size - 1;
+
+
+}
+
+/*
+ * cleanup()
+ * performs all ONE TIME cleanup for this test at
+ * completion or premature exit
+ */
+void
+cleanup(void)
+{
+ /*
+ * print timing stats if that option was specified.
+ * print errno log if that option was specified.
+ */
+ TEST_CLEANUP;
+
+ if (unlink(f_name) < 0) {
+ tst_resm(TFAIL, "unlink Failed--file = %s, errno = %d",
+ f_name, errno);
+ }
+ tst_rmdir();
+
+ tst_exit();
+}
+
+/*
+ * sighandler()
+ * Signal handler for SIGTERM and SIGPIPE
+ */
+void
+sighandler(int sig)
+{
+ switch(sig) {
+ case SIGTERM: break;
+ case SIGPIPE: ++in_sighandler;
+ return;
+ default:
+ tst_resm(TFAIL, "sighandler() received invalid signal "
+ ": %d", sig);
+ break;
+ }
+
+ if ((unlink(f_name) < 0) && (errno != ENOENT)) {
+ tst_resm(TFAIL, "unlink Failed--file = %s, errno = %d",
+ f_name, errno);
+ cleanup();
+ /*NOTREACHED*/
+ }
+ exit(sig);
+}
--
1.5.2
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