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-rw-r--r--src/shared/machine-image.c150
1 files changed, 146 insertions, 4 deletions
diff --git a/src/shared/machine-image.c b/src/shared/machine-image.c
index fa06a0dc59..7c041fab76 100644
--- a/src/shared/machine-image.c
+++ b/src/shared/machine-image.c
@@ -20,11 +20,13 @@
***/
#include <sys/statfs.h>
+#include <fcntl.h>
#include "strv.h"
#include "utf8.h"
#include "btrfs-util.h"
#include "path-util.h"
+#include "copy.h"
#include "machine-image.h"
static const char image_search_path[] =
@@ -317,18 +319,158 @@ void image_hashmap_free(Hashmap *map) {
}
int image_remove(Image *i) {
- int r;
-
assert(i);
if (path_equal(i->path, "/") ||
path_startswith(i->path, "/usr"))
return -EROFS;
- if (i->type == IMAGE_SUBVOLUME)
+ switch (i->type) {
+
+ case IMAGE_SUBVOLUME:
return btrfs_subvol_remove(i->path);
- else
+
+ case IMAGE_DIRECTORY:
+ case IMAGE_GPT:
return rm_rf_dangerous(i->path, false, true, false);
+
+ default:
+ return -ENOTSUP;
+ }
+}
+
+int image_rename(Image *i, const char *new_name) {
+ _cleanup_free_ char *new_path = NULL, *nn = NULL;
+ int r;
+
+ assert(i);
+
+ if (!image_name_is_valid(new_name))
+ return -EINVAL;
+
+ if (path_equal(i->path, "/") ||
+ path_startswith(i->path, "/usr"))
+ return -EROFS;
+
+ r = image_find(new_name, NULL);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ return -EEXIST;
+
+ switch (i->type) {
+
+ case IMAGE_SUBVOLUME:
+ case IMAGE_DIRECTORY:
+ new_path = file_in_same_dir(i->path, new_name);
+ break;
+
+ case IMAGE_GPT: {
+ const char *fn;
+
+ fn = strappenda(new_name, ".gpt");
+ new_path = file_in_same_dir(i->path, fn);
+ break;
+ }
+
+ default:
+ return -ENOTSUP;
+ }
+
+ if (!new_path)
+ return -ENOMEM;
+
+ nn = strdup(new_name);
+ if (!nn)
+ return -ENOMEM;
+
+ if (renameat2(AT_FDCWD, i->path, AT_FDCWD, new_path, RENAME_NOREPLACE) < 0)
+ return -errno;
+
+ free(i->path);
+ i->path = new_path;
+ new_path = NULL;
+
+ free(i->name);
+ i->name = nn;
+ nn = NULL;
+
+ return 0;
+}
+
+int image_clone(Image *i, const char *new_name, bool read_only) {
+ const char *new_path;
+ int r;
+
+ assert(i);
+
+ if (!image_name_is_valid(new_name))
+ return -EINVAL;
+
+ r = image_find(new_name, NULL);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ return -EEXIST;
+
+ switch (i->type) {
+
+ case IMAGE_SUBVOLUME:
+ case IMAGE_DIRECTORY:
+ new_path = strappenda("/var/lib/container/", new_name);
+
+ r = btrfs_subvol_snapshot(i->path, new_path, read_only, true);
+ break;
+
+ case IMAGE_GPT:
+ new_path = strappenda("/var/lib/container/", new_name, ".gpt");
+
+ r = copy_file_atomic(i->path, new_path, read_only ? 0444 : 0644, false);
+ break;
+
+ default:
+ return -ENOTSUP;
+ }
+
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int image_read_only(Image *i, bool b) {
+ int r;
+ assert(i);
+
+ if (path_equal(i->path, "/") ||
+ path_startswith(i->path, "/usr"))
+ return -EROFS;
+
+ switch (i->type) {
+
+ case IMAGE_SUBVOLUME:
+ r = btrfs_subvol_set_read_only(i->path, b);
+ if (r < 0)
+ return r;
+ break;
+
+ case IMAGE_GPT: {
+ struct stat st;
+
+ if (stat(i->path, &st) < 0)
+ return -errno;
+
+ if (chmod(i->path, (st.st_mode & 0444) | (b ? 0000 : 0200)) < 0)
+ return -errno;
+ break;
+ }
+
+ case IMAGE_DIRECTORY:
+ default:
+ return -ENOTSUP;
+ }
+
+ return 0;
}
static const char* const image_type_table[_IMAGE_TYPE_MAX] = {