installer: Fix umounting destination

[ipfire-2.x.git] / src / installer / hw.c

diff --git a/src/installer/hw.c b/src/installer/hw.c
index d74526050037e48a1458fa04403430b631903221..ce9777500d5cbd28ecabdb10082f7fbd04760841 100644 (file)
--- a/src/installer/hw.c
+++ b/src/installer/hw.c
@@ -24,6 +24,7 @@
 
 #include <assert.h>
 #include <blkid/blkid.h>
+#include <errno.h>
 #include <fcntl.h>
 #include <libudev.h>
 #include <linux/loop.h>
@@ -138,7 +139,16 @@ int hw_mount(const char* source, const char* target, const char* fs, int flags)
 }
 
 int hw_umount(const char* target) {
-       return umount2(target, 0);
+       int r = umount2(target, 0);
+
+       if (r && errno == EBUSY) {
+               // Give it a moment to settle
+               sleep(1);
+
+               r = umount2(target, MNT_FORCE);
+       }
+
+       return r;
 }
 
 static int hw_test_source_medium(const char* path) {
@@ -869,36 +879,47 @@ int hw_mount_filesystems(struct hw_destination* dest, const char* prefix) {
 }
 
 int hw_umount_filesystems(struct hw_destination* dest, const char* prefix) {
+       int r;
+       char target[STRING_SIZE];
+
        // Write all buffers to disk before umounting
        hw_sync();
 
        // boot
        if (*dest->part_boot) {
-               hw_umount(dest->part_boot);
+               snprintf(target, sizeof(target), "%s%s", prefix, HW_PATH_BOOT);
+               r = hw_umount(target);
+               if (r)
+                       return -1;
        }
 
        // data
        if (*dest->part_data) {
-               hw_umount(dest->part_data);
+               snprintf(target, sizeof(target), "%s%s", prefix, HW_PATH_DATA);
+               r = hw_umount(target);
+               if (r)
+                       return -1;
        }
 
-       // root
-       hw_umount(dest->part_root);
-
        // swap
        if (*dest->part_swap) {
                swapoff(dest->part_swap);
        }
 
        // misc filesystems
-       char target[STRING_SIZE];
        char** otherfs = other_filesystems;
-
        while (*otherfs) {
                snprintf(target, sizeof(target), "%s%s", prefix, *otherfs++);
-               hw_umount(target);
+               r = hw_umount(target);
+               if (r)
+                       return -1;
        }
 
+       // root
+       r = hw_umount(prefix);
+       if (r)
+               return -1;
+
        return 0;
 }
 
@@ -1012,6 +1033,8 @@ int hw_install_bootloader(struct hw_destination* dest, const char* output) {
                r = system_chroot(output, DESTINATION_MOUNT_PATH, cmd);
        }
 
+       hw_sync();
+
        return r;
 }