From e02cda008591317b1625707ff8e115a4841aa889 Mon Sep 17 00:00:00 2001 From: Timos Ampelikiotis Date: Tue, 10 Oct 2023 11:40:56 +0000 Subject: Introduce Virtio-loopback epsilon release: Epsilon release introduces a new compatibility layer which make virtio-loopback design to work with QEMU and rust-vmm vhost-user backend without require any changes. Signed-off-by: Timos Ampelikiotis Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9 --- tools/virtiofsd/passthrough_helpers.h | 51 +++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 tools/virtiofsd/passthrough_helpers.h (limited to 'tools/virtiofsd/passthrough_helpers.h') diff --git a/tools/virtiofsd/passthrough_helpers.h b/tools/virtiofsd/passthrough_helpers.h new file mode 100644 index 000000000..0b98275ed --- /dev/null +++ b/tools/virtiofsd/passthrough_helpers.h @@ -0,0 +1,51 @@ +/* + * FUSE: Filesystem in Userspace + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE + */ + +/* + * Creates files on the underlying file system in response to a FUSE_MKNOD + * operation + */ +static int mknod_wrapper(int dirfd, const char *path, const char *link, + int mode, dev_t rdev) +{ + int res; + + if (S_ISREG(mode)) { + res = openat(dirfd, path, O_CREAT | O_EXCL | O_WRONLY, mode); + if (res >= 0) { + res = close(res); + } + } else if (S_ISDIR(mode)) { + res = mkdirat(dirfd, path, mode); + } else if (S_ISLNK(mode) && link != NULL) { + res = symlinkat(link, dirfd, path); + } else if (S_ISFIFO(mode)) { + res = mkfifoat(dirfd, path, mode); + } else { + res = mknodat(dirfd, path, mode, rdev); + } + + return res; +} -- cgit 1.2.3-korg