1 files changed, 132 insertions, 0 deletions
diff --git a/hw/9pfs/9p-util-freebsd.c b/hw/9pfs/9p-util-freebsd.c
new file mode 100644
index 0000000..9dd1d06
--- /dev/null
+++ b/hw/9pfs/9p-util-freebsd.c
@@ -0,0 +1,132 @@
+/*
+ * 9p utilities (FreeBSD Implementation)
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+/*
+ * Not so fast! You might want to read the 9p developer docs first:
+ * https://wiki.qemu.org/Documentation/9p
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/xattr.h"
+#include "9p-util.h"
+
+static int mangle_xattr_name(const char **namep)
+{
+    const char *name = *namep;
+
+    /*
+     * ZFS forbids attributes in starting with "user." or "system.".
+     */
+    if (strncmp(name, "system.", 7) == 0) {
+        *namep = name + 7;
+        return EXTATTR_NAMESPACE_SYSTEM;
+    }
+    if (strncmp(name, "user.", 5) == 0) {
+        *namep = name + 5;
+    }
+    return EXTATTR_NAMESPACE_USER;
+}
+
+ssize_t fgetxattr(int fd, const char *name, void *value, size_t size)
+{
+    int namespace;
+
+    namespace = mangle_xattr_name(&name);
+    return extattr_get_fd(fd, namespace, name, value, size);
+}
+
+ssize_t fgetxattrat_nofollow(int dirfd, const char *filename, const char *name,
+                             void *value, size_t size)
+{
+    ssize_t ret;
+    int fd, namespace;
+
+    fd = openat_file(dirfd, filename,
+                     O_RDONLY | O_PATH_9P_UTIL | O_NOFOLLOW, 0);
+    if (fd == -1) {
+        return -1;
+    }
+    namespace = mangle_xattr_name(&name);
+    ret = extattr_get_fd(fd, namespace, name, value, size);
+    close_preserve_errno(fd);
+    return ret;
+}
+
+ssize_t flistxattrat_nofollow(int dirfd, const char *filename,
+                              char *list, size_t size)
+{
+    ssize_t ret;
+    int fd;
+
+    fd = openat_file(dirfd, filename,
+                     O_RDONLY | O_PATH_9P_UTIL | O_NOFOLLOW, 0);
+    if (fd == -1) {
+        return -1;
+    }
+    ret = extattr_list_fd(fd, EXTATTR_NAMESPACE_USER, list, size);
+    close_preserve_errno(fd);
+    return ret;
+}
+
+ssize_t fremovexattrat_nofollow(int dirfd, const char *filename,
+                                const char *name)
+{
+    int fd, namespace, ret;
+
+    fd = openat_file(dirfd, filename,
+                     O_RDONLY | O_PATH_9P_UTIL | O_NOFOLLOW, 0);
+    if (fd == -1) {
+        return -1;
+    }
+    namespace = mangle_xattr_name(&name);
+    ret = extattr_delete_fd(fd, namespace, name);
+    close_preserve_errno(fd);
+    return ret;
+}
+
+int fsetxattrat_nofollow(int dirfd, const char *filename, const char *name,
+                         void *value, size_t size, int flags)
+{
+    ssize_t ret;
+    int fd, namespace;
+
+    namespace = mangle_xattr_name(&name);
+    if (flags == (XATTR_CREATE | XATTR_REPLACE)) {
+        errno = EINVAL;
+        return -1;
+    }
+    fd = openat_file(dirfd, filename,
+                     O_RDONLY | O_PATH_9P_UTIL | O_NOFOLLOW, 0);
+    if (fd == -1) {
+        return -1;
+    }
+    if (flags & (XATTR_CREATE | XATTR_REPLACE)) {
+        ret = extattr_get_fd(fd, namespace, name, NULL, 0);
+        if (ret == -1 && errno != ENOATTR) {
+            close_preserve_errno(fd);
+            return -1;
+        }
+        if (ret >= 0 && (flags & XATTR_CREATE)) {
+            errno = EEXIST;
+            close_preserve_errno(fd);
+            return -1;
+        }
+        if (ret == -1 && (flags & XATTR_REPLACE)) {
+            errno = ENOATTR;
+            close_preserve_errno(fd);
+            return -1;
+        }
+    }
+    ret = extattr_set_fd(fd, namespace, name, value, size);
+    close_preserve_errno(fd);
+    return ret;
+}
+
+int qemu_mknodat(int dirfd, const char *filename, mode_t mode, dev_t dev)
+{
+    return mknodat(dirfd, filename, mode, dev);
+}