db, uvol: commit regular files before uvol volumes

add priority to order fsdir commit sequence

src/apk_fs.h

@@ -13,6 +13,9 @@
 #include "apk_io.h"
 #include "apk_pathbuilder.h"
 
+#define APK_FS_PRIO_DISK	0
+#define APK_FS_PRIO_UVOL	1
+
 #define APK_FS_CTRL_COMMIT	1
 #define APK_FS_CTRL_APKNEW	2
 #define APK_FS_CTRL_CANCEL	3
@@ -30,6 +33,8 @@ struct apk_fsdir {
 };
 
 struct apk_fsdir_ops {
+	uint8_t priority;
+
 	int (*dir_create)(struct apk_fsdir *, mode_t);
 	int (*dir_delete)(struct apk_fsdir *);
 	int (*dir_check)(struct apk_fsdir *, mode_t, uid_t, gid_t);
@@ -47,6 +52,10 @@ int apk_fs_extract(struct apk_ctx *, const struct apk_file_info *, struct apk_is
 
 void apk_fsdir_get(struct apk_fsdir *, apk_blob_t dir, struct apk_ctx *, apk_blob_t);
 
+static inline uint8_t apk_fsdir_priority(struct apk_fsdir *fs) {
+	return fs->ops->priority;
+}
+
 static inline int apk_fsdir_create(struct apk_fsdir *fs, mode_t mode) {
 	return fs->ops->dir_create(fs, mode);
 }

src/database.c

@@ -2801,9 +2801,9 @@ static void apk_db_purge_pkg(struct apk_database *db,
 	}
 }
 
-
-static void apk_db_migrate_files(struct apk_database *db,
-				 struct apk_installed_package *ipkg)
+static uint8_t apk_db_migrate_files_for_priority(struct apk_database *db,
+						 struct apk_installed_package *ipkg,
+						 uint8_t priority)
 {
 	struct apk_out *out = &db->ctx->out;
 	struct apk_db_dir_instance *diri;
@@ -2816,13 +2816,20 @@ static void apk_db_migrate_files(struct apk_database *db,
 	unsigned long hash;
 	apk_blob_t dirname;
 	int r, ctrl;
+	uint8_t dir_priority, next_priority = 0xff;
 
 	hlist_for_each_entry_safe(diri, dc, dn, &ipkg->owned_dirs, pkg_dirs_list) {
 		dir = diri->dir;
-		dir->modified = 1;
 		dirname = APK_BLOB_PTR_LEN(dir->name, dir->namelen);
 		apk_fsdir_get(&d, dirname, db->ctx, apk_pkg_ctx(ipkg->pkg));
+		dir_priority = apk_fsdir_priority(&d);
+		if (dir_priority != priority) {
+			if (dir_priority > priority && dir_priority < next_priority)
+				next_priority = dir_priority;
+			continue;
+		}
 
+		dir->modified = 1;
 		hlist_for_each_entry_safe(file, fc, fn, &diri->owned_files, diri_files_list) {
 			key = (struct apk_db_file_hash_key) {
 				.dirname = dirname,
@@ -2883,6 +2890,14 @@ static void apk_db_migrate_files(struct apk_database *db,
 			}
 		}
 	}
+	return next_priority;
+}
+
+static void apk_db_migrate_files(struct apk_database *db,
+				 struct apk_installed_package *ipkg)
+{
+	for (uint8_t prio = APK_FS_PRIO_DISK; prio != 0xff; )
+		prio = apk_db_migrate_files_for_priority(db, ipkg, prio);
 }
 
 static int apk_db_unpack_pkg(struct apk_database *db,

src/fs_fsys.c

@@ -285,6 +285,7 @@ static int fsys_file_digest(struct apk_fsdir *d, apk_blob_t filename, uint8_t al
 }
 
 static const struct apk_fsdir_ops fsdir_ops_fsys = {
+	.priority = APK_FS_PRIO_DISK,
 	.dir_create = fsys_dir_create,
 	.dir_delete = fsys_dir_delete,
 	.dir_check = fsys_dir_check,

src/fs_uvol.c

@@ -156,6 +156,7 @@ static int uvol_file_digest(struct apk_fsdir *d, apk_blob_t filename, uint8_t al
 }
 
 const struct apk_fsdir_ops fsdir_ops_uvol = {
+	.priority = APK_FS_PRIO_UVOL,
 	.dir_create = uvol_dir_create,
 	.dir_delete = uvol_dir_delete,
 	.dir_check = uvol_dir_check,