Merge pull request #422 from akihikodaki/containers

 Prefer user.containers.override_stat over user.fuseoverlayfs.

Author: giuseppe

.github/workflows/test.yaml

@@ -4,23 +4,23 @@ on: [push, pull_request]
 
 jobs:
   build_job:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     name: Build on ${{ matrix.arch }}
 
     strategy:
       matrix:
         include:
           - arch: armv7
-            distro: ubuntu20.04
+            distro: ubuntu22.04
           - arch: aarch64
-            distro: ubuntu20.04
+            distro: ubuntu22.04
           - arch: s390x
-            distro: ubuntu20.04
+            distro: ubuntu22.04
           - arch: ppc64le
-            distro: ubuntu20.04
+            distro: ubuntu22.04
     steps:
       - uses: actions/checkout@v2.1.0
-      - uses: uraimo/run-on-arch-action@v2.0.5
+      - uses: uraimo/run-on-arch-action@v2.7.2
         name: Build
         id: build
         with:
@@ -34,7 +34,7 @@ jobs:
 
           install: |
             apt-get update -q -y
-            apt-get install -q -y attr automake autotools-dev git make gcc pkg-config xz-utils python3.8 g++ python3-setuptools libdevmapper-dev btrfs-progs libbtrfs-dev go-md2man parallel libfuse3-dev bats
+            apt-get install -q -y attr automake autotools-dev git make gcc pkg-config xz-utils python3 g++ python3-setuptools libdevmapper-dev btrfs-progs libbtrfs-dev go-md2man parallel libfuse3-dev bats
 
           run: |
             ./autogen.sh
@@ -49,7 +49,7 @@ jobs:
             fuse-overlayfs
 
   Test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
       matrix:
@@ -66,7 +66,7 @@ jobs:
     - name: install dependencies
       run: |
             sudo apt-get update -q -y
-            sudo apt-get install -q -y attr automake autotools-dev git make gcc pkg-config xz-utils python3.8 g++ python3-setuptools libdevmapper-dev btrfs-progs libbtrfs-dev go-md2man parallel wget libfuse3-dev bats
+            sudo apt-get install -q -y attr automake autotools-dev git make gcc pkg-config xz-utils python3 g++ python3-setuptools libdevmapper-dev btrfs-progs libbtrfs-dev go-md2man parallel wget libfuse3-dev bats
 
             sudo mkdir -p /lower /upper /mnt $GOPATH/src/github.com/containers
             sudo sh -c "cd $GOPATH/src/github.com/containers; git clone --depth=1 https://github.com/containers/storage"
@@ -90,7 +90,7 @@ jobs:
     - name: Archive build artifacts
       uses: actions/upload-artifact@v3
       with:
-        name: fuse-overlayfs-x86_64-ubuntu20.04
+        name: fuse-overlayfs-x86_64-ubuntu22.04
         path: |
           fuse-overlayfs
       if: ${{ matrix.test == 'ovl-whiteouts' }}

contrib/fix-mode.py

@@ -6,12 +6,12 @@
 import errno
 
 XATTR_OVERRIDE_STAT_PRIVILEGED = "security.fuseoverlayfs.override_stat"
-XATTR_OVERRIDE_STAT = "user.fuseoverlayfs.override_stat"
+XATTR_OVERRIDE_CONTAINERS_STAT = "user.fuseoverlayfs.override_stat"
 
 if os.geteuid() == 0:
     xattr_name = XATTR_OVERRIDE_STAT_PRIVILEGED
 else:
-    xattr_name = XATTR_OVERRIDE_STAT
+    xattr_name = XATTR_OVERRIDE_CONTAINERS_STAT
 
 cwd_fd = os.open(".", os.O_PATH)
 
@@ -23,7 +23,7 @@ def fix_path(path):
         os.setxattr(path, xattr_name, str.encode(content), flags=os.XATTR_CREATE, follow_symlinks=False)
     except Exception as e:
         if e.errno == errno.EEXIST:
-            print("attr %s already present for %s: %s" % (XATTR_OVERRIDE_STAT, path, e.errno))
+            print("attr %s already present for %s: %s" % (xattr_name, path, e.errno))
             return
         raise e
 

direct.c

@@ -186,10 +186,10 @@ direct_load_data_source (struct ovl_layer *l, const char *opaque, const char *pa
 
   if (fgetxattr (l->fd, XATTR_PRIVILEGED_OVERRIDE_STAT, tmp, sizeof (tmp)) >= 0)
     l->stat_override_mode = STAT_OVERRIDE_PRIVILEGED;
-  else if (fgetxattr (l->fd, XATTR_OVERRIDE_STAT, tmp, sizeof (tmp)) >= 0)
-    l->stat_override_mode = STAT_OVERRIDE_USER;
   else if (fgetxattr (l->fd, XATTR_OVERRIDE_CONTAINERS_STAT, tmp, sizeof (tmp)) >= 0)
     l->stat_override_mode = STAT_OVERRIDE_CONTAINERS;
+  else if (fgetxattr (l->fd, XATTR_OVERRIDE_STAT, tmp, sizeof (tmp)) >= 0)
+    l->stat_override_mode = STAT_OVERRIDE_USER;
 
   return 0;
 }