On 11/06/2017 06:39 AM, Marc-André Lureau wrote: > Hi, > > Recently, Mike Kravetz added hugetlbfs support to memfd. However, he > didn't add sealing support. One of the reasons to use memfd is to have > shared memory sealing when doing IPC or sharing memory with another > process with some extra safety. qemu uses shared memory & hugetables > with vhost-user (used by dpdk), so it is reasonable to use memfd > now instead for convenience and security reasons. Thanks for doing this. I will create a patch to restructure the code such that memfd_create (and file sealing) is split out and will depend on CONFIG_TMPFS -or- CONFIG_HUGETLBFS. I think this can wait to go in until after this patch series. Unless, someone prefers that it go in first? -- Mike Kravetz > > Thanks! > > v1->v2: after Mike review, > - add "memfd-hugetlb:" prefix in memfd-test > - run fuse test on hugetlb backend memory > - rename function memfd_file_get_seals() -> memfd_file_seals_ptr() > - update commit messages > - added reviewed-by tags > > RFC->v1: > - split rfc patch, after early review feedback > - added patch for memfd-test changes > - fix build with hugetlbfs disabled > - small code and commit messages improvements > > Marc-André Lureau (9): > shmem: unexport shmem_add_seals()/shmem_get_seals() > shmem: rename functions that are memfd-related > hugetlb: expose hugetlbfs_inode_info in header > hugetlbfs: implement memfd sealing > shmem: add sealing support to hugetlb-backed memfd > memfd-tests: test hugetlbfs sealing > memfd-test: add 'memfd-hugetlb:' prefix when testing hugetlbfs > memfd-test: move common code to a shared unit > memfd-test: run fuse test on hugetlb backend memory > > fs/fcntl.c | 2 +- > fs/hugetlbfs/inode.c | 39 +++-- > include/linux/hugetlb.h | 11 ++ > include/linux/shmem_fs.h | 6 +- > mm/shmem.c | 59 ++++--- > tools/testing/selftests/memfd/Makefile | 5 + > tools/testing/selftests/memfd/common.c | 45 ++++++ > tools/testing/selftests/memfd/common.h | 9 ++ > tools/testing/selftests/memfd/fuse_test.c | 36 +++-- > tools/testing/selftests/memfd/memfd_test.c | 212 ++++--------------------- > tools/testing/selftests/memfd/run_fuse_test.sh | 2 +- > tools/testing/selftests/memfd/run_tests.sh | 1 + > 12 files changed, 195 insertions(+), 232 deletions(-) > create mode 100644 tools/testing/selftests/memfd/common.c > create mode 100644 tools/testing/selftests/memfd/common.h > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
