repart: Take configured minimum and maximum size into account for Minimize=

- Let's check if the minimum size we got is larger than the configured
maximum partition size and fail early if it is.
- Let's make sure for writable filesystems that we make the minimal
filesystem at least as large as the minimum partition size, to allow
creating minimal filesystems with a minimum size.

diff --git a/src/repart/repart.c b/src/repart/repart.c
index 9515b7539ff8f2969aa18e14f7b27810e94d642c..1a88185c475585277d28d776164293c22f699880 100644 (file)
--- a/src/repart/repart.c
+++ b/src/repart/repart.c
@@ -7625,6 +7625,11 @@ static int context_minimize(Context *context) {
                         if (fstat(fd, &st) < 0)
                                 return log_error_errno(errno, "Failed to stat temporary file: %m");
 
+                        if ((uint64_t) st.st_size > partition_max_size(context, p))
+                                return log_error_errno(SYNTHETIC_ERRNO(E2BIG),
+                                                       "Minimal partition size of %s filesystem of partition %s exceeds configured maximum size (%s > %s)",
+                                                       p->format, strna(hint), FORMAT_BYTES(st.st_size), FORMAT_BYTES(partition_max_size(context, p)));
+
                         log_info("Minimal partition size of %s filesystem of partition %s is %s",
                                  p->format, strna(hint), FORMAT_BYTES(st.st_size));
 
@@ -7661,8 +7666,12 @@ static int context_minimize(Context *context) {
                  * fool-proof. */
                 uint64_t heuristic = streq(p->format, "xfs") ? fsz : fsz / 2;
                 fsz = round_up_size(fsz + heuristic, context->grain_size);
-                if (minimal_size_by_fs_name(p->format) != UINT64_MAX)
-                        fsz = MAX(minimal_size_by_fs_name(p->format), fsz);
+                fsz = MAX(partition_min_size(context, p), fsz);
+
+                if (fsz > partition_max_size(context, p))
+                        return log_error_errno(SYNTHETIC_ERRNO(E2BIG),
+                                               "Minimal partition size of %s filesystem of partition %s exceeds configured maximum size (%s > %s)",
+                                               p->format, strna(hint), FORMAT_BYTES(fsz), FORMAT_BYTES(partition_max_size(context, p)));
 
                 log_info("Minimal partition size of %s filesystem of partition %s is %s",
                          p->format, strna(hint), FORMAT_BYTES(fsz));