Hi,
I create a file on tmpfs, and it read/write works fine. However, it cannot mmap, and returns EINVAL. I found the reason is that dataspace of the file is not valid.
L4::CapL4Re::Dataspace fds = fi->data_space() if (!fds.is_valid()) { return -EINVAL; }
How to make it valid? Is there another method to do file mapping?
Here is an example code snippet: ==========================
const char* filename = "/tmp/testfile"; ret = mount("/", "tmp", "tmpfs", 0, 0);
fd = open(filename, O_RDWR|O_CREAT);
write 10K data into file
addr = mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); //return -1, and errno is EINVAL
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