When we use mksquashfs tool to create a squashfs image from the files which have POSIX ACLs(Access Control Lists), we get these errors:
Unrecognised xattr prefix system.posix_acl_access Unrecognised xattr prefix system.posix_acl_default This patcheset adds posix acl support to squashfs to fix this problem. Patch #1 for kerenl tree and patch #2 for squashfs-tools tree. --- Testcase: $ mkdir root $ getfacl root # file: root # owner: tgl # group: tgl user::rwx group::r-x other::r-x $ setfacl -m u:tgl:rw root $ setfacl -m d:tgl:rw root $ getfacl root # file: root # owner: tgl # group: tgl user::rwx user:tgl:rw- group::r-x mask::rwx other::r-x default:user::rwx default:user:tgl:rw- default:group::r-x default:mask::rwx default:other::r-x $ getfattr -m . -d root # file: root system.posix_acl_access=0sAgAAAAEABwD/////AgAGAOgDAAAEAAUA/////xAABwD/////IAAFAP////8= system.posix_acl_default=0sAgAAAAEABwD/////AgAGAOgDAAAEAAUA/////xAABwD/////IAAFAP////8= $ mksquashfs root root.img $ sudo mount root.img /mnt/squash/ $ cd /mnt $ getfacl squash # file: squash # owner: tgl # group: tgl user::rwx user:tgl:rw- group::r-x mask::rwx other::r-x default:user::rwx default:user:tgl:rw- default:group::r-x default:mask::rwx default:other::r-x $ getfattr -m . -d squash # file: squash system.posix_acl_access=0sAgAAAAEABwD/////AgAGAOgDAAAEAAUA/////xAABwD/////IAAFAP////8= system.posix_acl_default=0sAgAAAAEABwD/////AgAGAOgDAAAEAAUA/////xAABwD/////IAAFAP////8= --- Geliang Tang (1): squashfs: Add posix acl support Documentation/filesystems/squashfs.txt | 2 - fs/squashfs/Kconfig | 11 ++++ fs/squashfs/Makefile | 1 + fs/squashfs/acl.c | 69 ++++++++++++++++++++++++++ fs/squashfs/acl.h | 31 ++++++++++++ fs/squashfs/inode.c | 4 +- fs/squashfs/namei.c | 6 ++- fs/squashfs/squashfs_fs.h | 12 +++-- fs/squashfs/super.c | 3 ++ fs/squashfs/symlink.c | 6 ++- fs/squashfs/xattr.c | 31 +++++++++++- fs/squashfs/xattr.h | 8 +++ 12 files changed, 171 insertions(+), 13 deletions(-) create mode 100644 fs/squashfs/acl.c create mode 100644 fs/squashfs/acl.h --- Geliang Tang (1): squashfs-tools: Add posix acl support squashfs-tools/read_xattrs.c | 2 ++ squashfs-tools/squashfs_fs.h | 12 +++++++----- 2 files changed, 9 insertions(+), 5 deletions(-) -- 2.17.1
