1 files changed, 67 insertions, 0 deletions
diff --git a/src/vmspawn/vmspawn-mount.c b/src/vmspawn/vmspawn-mount.c
new file mode 100644
index 0000000..ee63bda
--- /dev/null
+++ b/src/vmspawn/vmspawn-mount.c
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "alloc-util.h"
+#include "extract-word.h"
+#include "macro.h"
+#include "parse-argument.h"
+#include "path-util.h"
+#include "string-util.h"
+#include "vmspawn-mount.h"
+
+static void runtime_mount_done(RuntimeMount *mount) {
+        assert(mount);
+
+        mount->source = mfree(mount->source);
+        mount->target = mfree(mount->target);
+}
+
+void runtime_mount_context_done(RuntimeMountContext *ctx) {
+        assert(ctx);
+
+        FOREACH_ARRAY(mount, ctx->mounts, ctx->n_mounts)
+                runtime_mount_done(mount);
+
+        free(ctx->mounts);
+}
+
+int runtime_mount_parse(RuntimeMountContext *ctx, const char *s, bool read_only) {
+        _cleanup_(runtime_mount_done) RuntimeMount mount = { .read_only = read_only };
+        _cleanup_free_ char *source_rel = NULL;
+        int r;
+
+        assert(ctx);
+
+        r = extract_first_word(&s, &source_rel, ":", EXTRACT_DONT_COALESCE_SEPARATORS);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return -EINVAL;
+
+        if (isempty(source_rel))
+                return -EINVAL;
+
+        r = path_make_absolute_cwd(source_rel, &mount.source);
+        if (r < 0)
+                return r;
+
+        /* virtiofsd only supports directories */
+        r = is_dir(mount.source, /* follow= */ true);
+        if (r < 0)
+                return r;
+        if (!r)
+                return -ENOTDIR;
+
+        mount.target = s ? strdup(s) : TAKE_PTR(source_rel);
+        if (!mount.target)
+                return -ENOMEM;
+
+        if (!path_is_absolute(mount.target))
+                return -EINVAL;
+
+        if (!GREEDY_REALLOC(ctx->mounts, ctx->n_mounts + 1))
+                return log_oom();
+
+        ctx->mounts[ctx->n_mounts++] = TAKE_STRUCT(mount);
+
+        return 0;
+}