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sandbox: Open host file for read-only access if needed

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Some files cannot be written but read-only access is still useful for
tests. Add a fallback to read-only access when needed.

This is useful in CI when opening a large data file provided by docker,
where read/write access would result in copying the file, thus needing
a lot of extra disk space.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2022-02-28 15:13:47 -07:00
parent acc874a4c5
commit 7aa9dbd0ab
1 changed files with 8 additions and 3 deletions
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11
drivers/block/sandbox.c
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@ -125,9 +125,14 @@ int host_dev_bind(int devnum, char *filename, bool removable)
fd = os_open(filename, OS_O_RDWR);
if (fd == -1) {
printf("Failed to access host backing file '%s'\n", filename);
ret = -ENOENT;
goto err;
printf("Failed to access host backing file '%s', trying read-only\n",
filename);
fd = os_open(filename, OS_O_RDONLY);
if (fd == -1) {
printf("- still failed\n");
ret = -ENOENT;
goto err;
}
}
ret = blk_create_device(gd->dm_root, "sandbox_host_blk", str,
IF_TYPE_HOST, devnum, 512,