.

bigfile/tests/test_virtmem.c

@@ -1139,6 +1139,25 @@ void *mmapfile_mmap_setup_read(BigFile *file, blk_t blk, size_t blklen, VMA *vma
     return addr;
 }
 
+int mmapfile_storeblk(BigFile *file, blk_t blk, const void *buf) {
+    BigFileMMap *f = upcast(BigFileMMap*, file);
+    size_t n = f->blksize;
+    off_t at = blk*f->blksize;
+
+    while (n > 0) {
+        ssize_t wrote;
+        wrote = pwrite(f->fd, buf, n, at);
+        if (wrote == -1)
+            return -1;
+
+        BUG_ON(wrote > n);
+        n -= wrote;
+        buf += wrote;
+    }
+
+    return 0;
+}
+
 void mmapfile_release(BigFile *file) {
     BigFileMMap *f = upcast(BigFileMMap*, file);
     int err;
@@ -1149,8 +1168,8 @@ void mmapfile_release(BigFile *file) {
 
 static const struct bigfile_ops mmapfile_ops = {
     .loadblk            = NULL,
-//  .storeblk           = mmapfile_storeblk,
     .mmap_setup_read    = mmapfile_mmap_setup_read,
+    .storeblk           = mmapfile_storeblk,
     .release            = mmapfile_release,
 };
 
@@ -1173,21 +1192,40 @@ void test_file_access_mmapbase(void)
     /* ensure we are starting from new ram */
     ok1(list_empty(&ram->lru_list));
 
-    /* setup mmaped id file */
+    /* setup mmaped file */
     char path[] = "/tmp/bigfile_mmap.XXXXXX";
     fd = mkstemp(path);
     ok1(fd != -1);
     err = unlink(path);
     ok1(!err);
-    // XXX write data
 
-    BigFileMMap fileid = {
+    BigFileMMap file = {
         .blksize    = ram->pagesize,    /* artificially blksize = pagesize */
         .file_ops   = &mmapfile_ops,
         .fd         = fd,
     };
 
-    err = fileh_open(fh, &fileid, ram);
+    /* fstore stores date into file[blk] */
+    void fstore(blk_t blk, blk_t data) {
+        blk_t *buf;
+        int i;
+        buf = malloc(file.blksize);
+        BUG_ON(!buf);
+        for (i=0; i < file.blksize/sizeof(*buf); i++)
+            buf[i] = data;
+        err = file.file_ops->storeblk(&file, blk, buf);
+        BUG_ON(err);
+        free(buf);
+    }
+
+    /* initialize file[100 +4) */
+    fstore(100, 100);
+    fstore(101, 101);
+    fstore(102, 102);
+    fstore(103, 103);
+
+
+    err = fileh_open(fh, &file, ram);
     ok1(!err);
 
 /* implicitly use fileh=fh */