tools/testing/selftests/ublk/common.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/ublk/common.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/ublk/common.c
Extension
.c
Size
1074 bytes
Lines
56
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

if (fd < 0) {
			ublk_err("%s: backing file %s can't be opened: %s\n",
					__func__, file, strerror(errno));
			return -EBADF;
		}

		if (fstat(fd, &st) < 0) {
			close(fd);
			return -EBADF;
		}

		if (S_ISREG(st.st_mode))
			bytes = st.st_size;
		else if (S_ISBLK(st.st_mode)) {
			if (ioctl(fd, BLKGETSIZE64, &bytes) != 0)
				return -1;
		} else {
			return -EINVAL;
		}

		dev->tgt.backing_file_size[i] = bytes;
		dev->fds[dev->nr_fds] = fd;
		dev->nr_fds += 1;
	}

	return 0;
}

Annotation

Implementation Notes