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-rw-r--r--qa/workunits/direct_io/.gitignore3
-rw-r--r--qa/workunits/direct_io/Makefile11
-rwxr-xr-xqa/workunits/direct_io/big.sh6
-rw-r--r--qa/workunits/direct_io/direct_io_test.c312
-rwxr-xr-xqa/workunits/direct_io/misc.sh16
-rw-r--r--qa/workunits/direct_io/test_short_dio_read.c57
-rw-r--r--qa/workunits/direct_io/test_sync_io.c250
7 files changed, 655 insertions, 0 deletions
diff --git a/qa/workunits/direct_io/.gitignore b/qa/workunits/direct_io/.gitignore
new file mode 100644
index 000000000..80f1fd1aa
--- /dev/null
+++ b/qa/workunits/direct_io/.gitignore
@@ -0,0 +1,3 @@
+/direct_io_test
+/test_sync_io
+/test_short_dio_read
diff --git a/qa/workunits/direct_io/Makefile b/qa/workunits/direct_io/Makefile
new file mode 100644
index 000000000..20fec0be5
--- /dev/null
+++ b/qa/workunits/direct_io/Makefile
@@ -0,0 +1,11 @@
+CFLAGS = -Wall -Wextra -D_GNU_SOURCE
+
+TARGETS = direct_io_test test_sync_io test_short_dio_read
+
+.c:
+ $(CC) $(CFLAGS) $@.c -o $@
+
+all: $(TARGETS)
+
+clean:
+ rm $(TARGETS)
diff --git a/qa/workunits/direct_io/big.sh b/qa/workunits/direct_io/big.sh
new file mode 100755
index 000000000..43bd6d72b
--- /dev/null
+++ b/qa/workunits/direct_io/big.sh
@@ -0,0 +1,6 @@
+#!/bin/sh -ex
+
+echo "test large (16MB) dio write"
+dd if=/dev/zero of=foo.big bs=16M count=1 oflag=direct
+
+echo OK
diff --git a/qa/workunits/direct_io/direct_io_test.c b/qa/workunits/direct_io/direct_io_test.c
new file mode 100644
index 000000000..ccfbbb860
--- /dev/null
+++ b/qa/workunits/direct_io/direct_io_test.c
@@ -0,0 +1,312 @@
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2011 New Dream Network
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#include <errno.h>
+#include <inttypes.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+/*
+ * direct_io_test
+ *
+ * This test does some I/O using O_DIRECT.
+ *
+ * Semantics of O_DIRECT can be found at http://lwn.net/Articles/348739/
+ *
+ */
+
+static int g_num_pages = 100;
+
+static int g_duration = 10;
+
+struct chunk {
+ uint64_t offset;
+ uint64_t pad0;
+ uint64_t pad1;
+ uint64_t pad2;
+ uint64_t pad3;
+ uint64_t pad4;
+ uint64_t pad5;
+ uint64_t not_offset;
+} __attribute__((packed));
+
+static int page_size;
+
+static char temp_file[] = "direct_io_temp_file_XXXXXX";
+
+static int safe_write(int fd, const void *buf, signed int len)
+{
+ const char *b = (const char*)buf;
+ /* Handle EINTR and short writes */
+ while (1) {
+ int res = write(fd, b, len);
+ if (res < 0) {
+ int err = errno;
+ if (err != EINTR) {
+ return err;
+ }
+ }
+ len -= res;
+ b += res;
+ if (len <= 0)
+ return 0;
+ }
+}
+
+static int do_read(int fd, char *buf, int buf_sz)
+{
+ /* We assume no short reads or EINTR. It's not really clear how
+ * those things interact with O_DIRECT. */
+ int ret = read(fd, buf, buf_sz);
+ if (ret < 0) {
+ int err = errno;
+ printf("do_read: error: %d (%s)\n", err, strerror(err));
+ return err;
+ }
+ if (ret != buf_sz) {
+ printf("do_read: short read\n");
+ return -EIO;
+ }
+ return 0;
+}
+
+static int setup_temp_file(void)
+{
+ int fd;
+ int64_t num_chunks, i;
+
+ if (page_size % sizeof(struct chunk)) {
+ printf("setup_big_file: page_size doesn't divide evenly "
+ "into data blocks.\n");
+ return -EINVAL;
+ }
+
+ fd = mkstemp(temp_file);
+ if (fd < 0) {
+ int err = errno;
+ printf("setup_big_file: mkostemps failed with error %d\n", err);
+ return err;
+ }
+
+ num_chunks = g_num_pages * (page_size / sizeof(struct chunk));
+ for (i = 0; i < num_chunks; ++i) {
+ int ret;
+ struct chunk c;
+ memset(&c, 0, sizeof(c));
+ c.offset = i * sizeof(struct chunk);
+ c.pad0 = 0;
+ c.pad1 = 1;
+ c.pad2 = 2;
+ c.pad3 = 3;
+ c.pad4 = 4;
+ c.pad5 = 5;
+ c.not_offset = ~c.offset;
+ ret = safe_write(fd, &c, sizeof(struct chunk));
+ if (ret) {
+ printf("setup_big_file: safe_write failed with "
+ "error: %d\n", ret);
+ TEMP_FAILURE_RETRY(close(fd));
+ unlink(temp_file);
+ return ret;
+ }
+ }
+ TEMP_FAILURE_RETRY(close(fd));
+ return 0;
+}
+
+static int verify_chunk(const struct chunk *c, uint64_t offset)
+{
+ if (c->offset != offset) {
+ printf("verify_chunk(%" PRId64 "): bad offset value (got: %"
+ PRId64 ", expected: %" PRId64 "\n", offset, c->offset, offset);
+ return EIO;
+ }
+ if (c->pad0 != 0) {
+ printf("verify_chunk(%" PRId64 "): bad pad0 value\n", offset);
+ return EIO;
+ }
+ if (c->pad1 != 1) {
+ printf("verify_chunk(%" PRId64 "): bad pad1 value\n", offset);
+ return EIO;
+ }
+ if (c->pad2 != 2) {
+ printf("verify_chunk(%" PRId64 "): bad pad2 value\n", offset);
+ return EIO;
+ }
+ if (c->pad3 != 3) {
+ printf("verify_chunk(%" PRId64 "): bad pad3 value\n", offset);
+ return EIO;
+ }
+ if (c->pad4 != 4) {
+ printf("verify_chunk(%" PRId64 "): bad pad4 value\n", offset);
+ return EIO;
+ }
+ if (c->pad5 != 5) {
+ printf("verify_chunk(%" PRId64 "): bad pad5 value\n", offset);
+ return EIO;
+ }
+ if (c->not_offset != ~offset) {
+ printf("verify_chunk(%" PRId64 "): bad not_offset value\n",
+ offset);
+ return EIO;
+ }
+ return 0;
+}
+
+static int do_o_direct_reads(void)
+{
+ int fd, ret;
+ unsigned int i;
+ void *buf = 0;
+ time_t cur_time, end_time;
+ ret = posix_memalign(&buf, page_size, page_size);
+ if (ret) {
+ printf("do_o_direct_reads: posix_memalign returned %d\n", ret);
+ goto done;
+ }
+
+ fd = open(temp_file, O_RDONLY | O_DIRECT);
+ if (fd < 0) {
+ ret = errno;
+ printf("do_o_direct_reads: error opening fd: %d\n", ret);
+ goto free_buf;
+ }
+
+ // read the first chunk and see if it looks OK
+ ret = do_read(fd, buf, page_size);
+ if (ret)
+ goto close_fd;
+ ret = verify_chunk((struct chunk*)buf, 0);
+ if (ret)
+ goto close_fd;
+
+ // read some random chunks and see how they look
+ cur_time = time(NULL);
+ end_time = cur_time + g_duration;
+ i = 0;
+ do {
+ time_t next_time;
+ uint64_t offset;
+ int page;
+ unsigned int seed;
+
+ seed = i++;
+ page = rand_r(&seed) % g_num_pages;
+ offset = page;
+ offset *= page_size;
+ if (lseek64(fd, offset, SEEK_SET) == -1) {
+ int err = errno;
+ printf("lseek64(%" PRId64 ") failed: error %d (%s)\n",
+ offset, err, strerror(err));
+ goto close_fd;
+ }
+ ret = do_read(fd, buf, page_size);
+ if (ret)
+ goto close_fd;
+ ret = verify_chunk((struct chunk*)buf, offset);
+ if (ret)
+ goto close_fd;
+ next_time = time(NULL);
+ if (next_time > cur_time) {
+ printf(".");
+ }
+ cur_time = next_time;
+ } while (time(NULL) < end_time);
+
+ printf("\ndo_o_direct_reads: SUCCESS\n");
+close_fd:
+ TEMP_FAILURE_RETRY(close(fd));
+free_buf:
+ free(buf);
+done:
+ return ret;
+}
+
+static void usage(char *argv0)
+{
+ printf("%s: tests direct I/O\n", argv0);
+ printf("-d <seconds>: sets duration to <seconds>\n");
+ printf("-h: this help\n");
+ printf("-p <pages>: sets number of pages to allocate\n");
+}
+
+static void parse_args(int argc, char *argv[])
+{
+ int c;
+ while ((c = getopt (argc, argv, "d:hp:")) != -1) {
+ switch (c) {
+ case 'd':
+ g_duration = atoi(optarg);
+ if (g_duration <= 0) {
+ printf("tried to set invalid value of "
+ "g_duration: %d\n", g_num_pages);
+ exit(1);
+ }
+ break;
+ case 'h':
+ usage(argv[0]);
+ exit(0);
+ break;
+ case 'p':
+ g_num_pages = atoi(optarg);
+ if (g_num_pages <= 0) {
+ printf("tried to set invalid value of "
+ "g_num_pages: %d\n", g_num_pages);
+ exit(1);
+ }
+ break;
+ case '?':
+ usage(argv[0]);
+ exit(1);
+ break;
+ default:
+ usage(argv[0]);
+ exit(1);
+ break;
+ }
+ }
+}
+
+int main(int argc, char *argv[])
+{
+ int ret;
+
+ parse_args(argc, argv);
+
+ setvbuf(stdout, NULL, _IONBF, 0);
+
+ page_size = getpagesize();
+
+ ret = setup_temp_file();
+ if (ret) {
+ printf("setup_temp_file failed with error %d\n", ret);
+ goto done;
+ }
+
+ ret = do_o_direct_reads();
+ if (ret) {
+ printf("do_o_direct_reads failed with error %d\n", ret);
+ goto unlink_temp_file;
+ }
+
+unlink_temp_file:
+ unlink(temp_file);
+done:
+ return ret;
+}
diff --git a/qa/workunits/direct_io/misc.sh b/qa/workunits/direct_io/misc.sh
new file mode 100755
index 000000000..6de080d2d
--- /dev/null
+++ b/qa/workunits/direct_io/misc.sh
@@ -0,0 +1,16 @@
+#!/bin/sh -ex
+
+# a few test cases from henry
+echo "test read from hole"
+dd if=/dev/zero of=dd3 bs=1 seek=1048576 count=0
+dd if=dd3 of=/tmp/ddout1 skip=8 bs=512 count=2 iflag=direct
+dd if=/dev/zero of=/tmp/dd3 bs=512 count=2
+cmp /tmp/dd3 /tmp/ddout1
+
+echo "other thing"
+dd if=/dev/urandom of=/tmp/dd10 bs=500 count=1
+dd if=/tmp/dd10 of=dd10 bs=512 seek=8388 count=1
+dd if=dd10 of=/tmp/dd10out bs=512 skip=8388 count=1 iflag=direct
+cmp /tmp/dd10 /tmp/dd10out
+
+echo OK
diff --git a/qa/workunits/direct_io/test_short_dio_read.c b/qa/workunits/direct_io/test_short_dio_read.c
new file mode 100644
index 000000000..502485557
--- /dev/null
+++ b/qa/workunits/direct_io/test_short_dio_read.c
@@ -0,0 +1,57 @@
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+
+int main()
+{
+ char buf[409600];
+ ssize_t r;
+ int err;
+ int fd = open("shortfile", O_WRONLY|O_CREAT, 0644);
+
+ if (fd < 0) {
+ err = errno;
+ printf("error: open() failed with: %d (%s)\n", err, strerror(err));
+ exit(err);
+ }
+
+ printf("writing first 3 bytes of 10k file\n");
+ r = write(fd, "foo", 3);
+ if (r == -1) {
+ err = errno;
+ printf("error: write() failed with: %d (%s)\n", err, strerror(err));
+ close(fd);
+ exit(err);
+ }
+ r = ftruncate(fd, 10000);
+ if (r == -1) {
+ err = errno;
+ printf("error: ftruncate() failed with: %d (%s)\n", err, strerror(err));
+ close(fd);
+ exit(err);
+ }
+
+ fsync(fd);
+ close(fd);
+
+ printf("reading O_DIRECT\n");
+ fd = open("shortfile", O_RDONLY|O_DIRECT);
+ if (fd < 0) {
+ err = errno;
+ printf("error: open() failed with: %d (%s)\n", err, strerror(err));
+ exit(err);
+ }
+
+ r = read(fd, buf, sizeof(buf));
+ close(fd);
+
+ printf("got %d\n", (int)r);
+ if (r != 10000)
+ return 1;
+ return 0;
+}
diff --git a/qa/workunits/direct_io/test_sync_io.c b/qa/workunits/direct_io/test_sync_io.c
new file mode 100644
index 000000000..f393fa6e8
--- /dev/null
+++ b/qa/workunits/direct_io/test_sync_io.c
@@ -0,0 +1,250 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <inttypes.h>
+#include <linux/types.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+
+//#include "../client/ioctl.h"
+
+#include <linux/ioctl.h>
+#define CEPH_IOCTL_MAGIC 0x97
+#define CEPH_IOC_SYNCIO _IO(CEPH_IOCTL_MAGIC, 5)
+
+void write_pattern()
+{
+ printf("writing pattern\n");
+
+ uint64_t i;
+ int r;
+
+ int fd = open("foo", O_CREAT|O_WRONLY, 0644);
+ if (fd < 0) {
+ r = errno;
+ printf("write_pattern: error: open() failed with: %d (%s)\n", r, strerror(r));
+ exit(r);
+ }
+ for (i=0; i<1048576 * sizeof(i); i += sizeof(i)) {
+ r = write(fd, &i, sizeof(i));
+ if (r == -1) {
+ r = errno;
+ printf("write_pattern: error: write() failed with: %d (%s)\n", r, strerror(r));
+ break;
+ }
+ }
+
+ close(fd);
+}
+
+int verify_pattern(char *buf, size_t len, uint64_t off)
+{
+ size_t i;
+
+ for (i = 0; i < len; i += sizeof(uint64_t)) {
+ uint64_t expected = i + off;
+ uint64_t actual = *(uint64_t*)(buf + i);
+ if (expected != actual) {
+ printf("error: offset %llu had %llu\n", (unsigned long long)expected,
+ (unsigned long long)actual);
+ exit(1);
+ }
+ }
+ return 0;
+}
+
+void generate_pattern(void *buf, size_t len, uint64_t offset)
+{
+ uint64_t *v = buf;
+ size_t i;
+
+ for (i=0; i<len / sizeof(v); i++)
+ v[i] = i * sizeof(v) + offset;
+ verify_pattern(buf, len, offset);
+}
+
+int read_file(int buf_align, uint64_t offset, int len, int direct) {
+
+ printf("read_file buf_align %d offset %llu len %d\n", buf_align,
+ (unsigned long long)offset, len);
+ void *rawbuf;
+ int r;
+ int flags;
+ int err = 0;
+
+ if(direct)
+ flags = O_RDONLY|O_DIRECT;
+ else
+ flags = O_RDONLY;
+
+ int fd = open("foo", flags);
+ if (fd < 0) {
+ err = errno;
+ printf("read_file: error: open() failed with: %d (%s)\n", err, strerror(err));
+ exit(err);
+ }
+
+ if (!direct)
+ ioctl(fd, CEPH_IOC_SYNCIO);
+
+ if ((r = posix_memalign(&rawbuf, 4096, len + buf_align)) != 0) {
+ printf("read_file: error: posix_memalign failed with %d", r);
+ close(fd);
+ exit (r);
+ }
+
+ void *buf = (char *)rawbuf + buf_align;
+ memset(buf, 0, len);
+ r = pread(fd, buf, len, offset);
+ if (r == -1) {
+ err = errno;
+ printf("read_file: error: pread() failed with: %d (%s)\n", err, strerror(err));
+ goto out;
+ }
+ r = verify_pattern(buf, len, offset);
+
+out:
+ close(fd);
+ free(rawbuf);
+ return r;
+}
+
+int read_direct(int buf_align, uint64_t offset, int len)
+{
+ printf("read_direct buf_align %d offset %llu len %d\n", buf_align,
+ (unsigned long long)offset, len);
+ return read_file(buf_align, offset, len, 1);
+}
+
+int read_sync(int buf_align, uint64_t offset, int len)
+{
+ printf("read_sync buf_align %d offset %llu len %d\n", buf_align,
+ (unsigned long long)offset, len);
+ return read_file(buf_align, offset, len, 0);
+}
+
+int write_file(int buf_align, uint64_t offset, int len, int direct)
+{
+ printf("write_file buf_align %d offset %llu len %d\n", buf_align,
+ (unsigned long long)offset, len);
+ void *rawbuf;
+ int r;
+ int err = 0;
+ int flags;
+ if (direct)
+ flags = O_WRONLY|O_DIRECT|O_CREAT;
+ else
+ flags = O_WRONLY|O_CREAT;
+
+ int fd = open("foo", flags, 0644);
+ if (fd < 0) {
+ int err = errno;
+ printf("write_file: error: open() failed with: %d (%s)\n", err, strerror(err));
+ exit(err);
+ }
+
+ if ((r = posix_memalign(&rawbuf, 4096, len + buf_align)) != 0) {
+ printf("write_file: error: posix_memalign failed with %d", r);
+ err = r;
+ goto out_close;
+ }
+
+ if (!direct)
+ ioctl(fd, CEPH_IOC_SYNCIO);
+
+ void *buf = (char *)rawbuf + buf_align;
+
+ generate_pattern(buf, len, offset);
+
+ r = pwrite(fd, buf, len, offset);
+ close(fd);
+
+ fd = open("foo", O_RDONLY);
+ if (fd < 0) {
+ err = errno;
+ printf("write_file: error: open() failed with: %d (%s)\n", err, strerror(err));
+ free(rawbuf);
+ goto out_unlink;
+ }
+ void *buf2 = malloc(len);
+ if (!buf2) {
+ err = -ENOMEM;
+ printf("write_file: error: malloc failed\n");
+ goto out_free;
+ }
+
+ memset(buf2, 0, len);
+ r = pread(fd, buf2, len, offset);
+ if (r == -1) {
+ err = errno;
+ printf("write_file: error: pread() failed with: %d (%s)\n", err, strerror(err));
+ goto out_free_buf;
+ }
+ r = verify_pattern(buf2, len, offset);
+
+out_free_buf:
+ free(buf2);
+out_free:
+ free(rawbuf);
+out_close:
+ close(fd);
+out_unlink:
+ unlink("foo");
+ if (err)
+ exit(err);
+ return r;
+}
+
+int write_direct(int buf_align, uint64_t offset, int len)
+{
+ printf("write_direct buf_align %d offset %llu len %d\n", buf_align,
+ (unsigned long long)offset, len);
+ return write_file (buf_align, offset, len, 1);
+}
+
+int write_sync(int buf_align, uint64_t offset, int len)
+{
+ printf("write_sync buf_align %d offset %llu len %d\n", buf_align,
+ (unsigned long long)offset, len);
+ return write_file (buf_align, offset, len, 0);
+}
+
+int main(int argc, char **argv)
+{
+ uint64_t i, j, k;
+ int read = 1;
+ int write = 1;
+
+ if (argc >= 2 && strcmp(argv[1], "read") == 0)
+ write = 0;
+ if (argc >= 2 && strcmp(argv[1], "write") == 0)
+ read = 0;
+
+ if (read) {
+ write_pattern();
+
+ for (i = 0; i < 4096; i += 512)
+ for (j = 4*1024*1024 - 4096; j < 4*1024*1024 + 4096; j += 512)
+ for (k = 1024; k <= 16384; k *= 2) {
+ read_direct(i, j, k);
+ read_sync(i, j, k);
+ }
+
+ }
+ unlink("foo");
+ if (write) {
+ for (i = 0; i < 4096; i += 512)
+ for (j = 4*1024*1024 - 4096 + 512; j < 4*1024*1024 + 4096; j += 512)
+ for (k = 1024; k <= 16384; k *= 2) {
+ write_direct(i, j, k);
+ write_sync(i, j, k);
+ }
+ }
+
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 18:32:49 +0000