basic: New function fstype_is_blockdev_backed for fstypes that need a blockdev

The function returns true if the specified filesystem requires a block device.

2 files changed, 11 insertions, 0 deletions

diff --git a/src/basic/mountpoint-util.c b/src/basic/mountpoint-util.c
index 0b3587ff55..d4a621c7ae 100644
--- a/src/basic/mountpoint-util.c
+++ b/src/basic/mountpoint-util.c
@@ -338,6 +338,16 @@ bool fstype_is_api_vfs(const char *fstype) {
                           "tracefs");
 }
 
+bool fstype_is_blockdev_backed(const char *fstype) {
+        const char *x;
+
+        x = startswith(fstype, "fuse.");
+        if (x)
+                fstype = x;
+
+        return !streq(fstype, "9p") && !fstype_is_network(fstype) && !fstype_is_api_vfs(fstype);
+}
+
 bool fstype_is_ro(const char *fstype) {
         /* All Linux file systems that are necessarily read-only */
         return STR_IN_SET(fstype,
diff --git a/src/basic/mountpoint-util.h b/src/basic/mountpoint-util.h
index 5398836fed..ab4ed19394 100644
--- a/src/basic/mountpoint-util.h
+++ b/src/basic/mountpoint-util.h
@@ -14,6 +14,7 @@ int path_is_mount_point(const char *path, const char *root, int flags);
 
 bool fstype_is_network(const char *fstype);
 bool fstype_is_api_vfs(const char *fstype);
+bool fstype_is_blockdev_backed(const char *fstype);
 bool fstype_is_ro(const char *fsype);
 bool fstype_can_discard(const char *fstype);
 bool fstype_can_uid_gid(const char *fstype);