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 <s...@chromium.org>
---
drivers/block/sandbox.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/block/sandbox.c b/drivers/block/sandbox.c
index 53925ce9b6..1388498a1d 100644
--- a/drivers/block/sandbox.c
+++ b/drivers/block/sandbox.c
@@ -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,
--
2.35.1.574.g5d30c73bfb-goog
