LU-14709 pcc: VM_WRITE should not trigger layout write

[fs/lustre-release.git] / lustre / tests / mmap_sanity.c

diff --git a/lustre/tests/mmap_sanity.c b/lustre/tests/mmap_sanity.c
index 6b17d52..a55936c 100644 (file)
--- a/lustre/tests/mmap_sanity.c
+++ b/lustre/tests/mmap_sanity.c
@@ -467,7 +467,7 @@ static int cancel_lru_locks(char *filter)
                return -EINVAL;
 
        for (i = 0; i < paths.gl_pathc; i++) {
-               FILE *f = fopen(paths.gl_pathv[i], "r");
+               FILE *f = fopen(paths.gl_pathv[i], "r+");
 
                if (!f) {
                        rc = -errno;
@@ -806,6 +806,67 @@ out:
        return rc;
 }
 
+static int mmap_tst10(char *mnt)
+{
+       char *buf = MAP_FAILED;
+       char *buffer[256];
+       struct stat st1, st2;
+       long off;
+       int fd = -1;
+       int rc = 0;
+
+       /* cancel unused locks */
+       rc = cancel_lru_locks("osc");
+       if (rc)
+               goto out;
+
+       fd = open(mmap_sanity, O_RDONLY);
+       if (fd == -1) {
+               perror("open");
+               rc = -errno;
+               goto out;
+       }
+
+       if (fstat(fd, &st1) != 0) {
+               perror("fstat");
+               rc = -errno;
+               goto out;
+       }
+
+       sleep(1);
+
+       buf = mmap(NULL, st1.st_size, PROT_READ | PROT_WRITE,
+                  MAP_PRIVATE | MAP_NORESERVE, fd, 0);
+       if (buf == MAP_FAILED) {
+               perror("mmap");
+               rc = -errno;
+               goto out;
+       }
+
+       /* read some data */
+       for (off = 0; off + 256 <= st1.st_size; off += 256)
+               memcpy(buffer, off + buf, 256);
+
+       if (fstat(fd, &st2) != 0) {
+               perror("fstat");
+               rc = -errno;
+               goto out;
+       }
+
+       if (st1.st_mtime != st2.st_mtime) {
+               fprintf(stderr, "before mmap read mtime(%ld) != after mtime=(%ld)\n",
+                       st1.st_mtime, st2.st_mtime);
+               rc = -EINVAL;
+               goto out;
+       }
+out:
+       if (buf != MAP_FAILED)
+               munmap(buf, st1.st_size);
+       if (fd != -1)
+               close(fd);
+       return rc;
+}
+
 static int remote_tst(int tc, char *mnt)
 {
        int rc = 0;
@@ -889,6 +950,12 @@ struct test_case tests[] = {
                .node_cnt       = 1
        },
        {
+               .tc             = 10,
+               .desc           = "mmap test10: mtime not change for readonly mmap access",
+               .test_fn        = mmap_tst10,
+               .node_cnt       = 1
+       },
+       {
                .tc             = 0
        }
 };