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charset="UTF-8" X-Stat-Signature: etrudz5pgbeegqbucqwfyyatjxeheomz X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 4C3A61C0004 X-HE-Tag: 1790816267-658359 X-HE-Meta: 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 ySqb61Vd 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Use the luo_session_preserve_fds() to preserve vfio cdev, iommufd and memfd together in a batch. Signed-off-by: Samiullah Khawaja --- .../iommu/iommufd_liveupdate_kexec_test.c | 27 ++++++++++++++++--- 1 file changed, 24 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/iommu/iommufd_liveupdate_kexec_test.c b/tools/testing/selftests/iommu/iommufd_liveupdate_kexec_test.c index 26c7e15b6187..3ce282fc1a33 100644 --- a/tools/testing/selftests/iommu/iommufd_liveupdate_kexec_test.c +++ b/tools/testing/selftests/iommu/iommufd_liveupdate_kexec_test.c @@ -153,6 +153,9 @@ static void setup_iommufd(int iommufd, int memfd, int cdev_fd) static void before_kexec(int luo_fd) { int iommufd, cdev_fd, memfd, session; + __u64 tokens[3]; + __u32 failed; + int fds[3]; create_state_file(luo_fd, state_session, STATE_TOKEN, /*next_stage=*/2); @@ -174,9 +177,27 @@ static void before_kexec(int luo_fd) if (!luo_session_preserve_fd(session, iommufd, IOMMUFD_TOKEN)) fail_exit("Preserving iommufd without memfd should fail"); - test_luo_session_preserve_fd(session, memfd, MEMFD_TOKEN); - test_luo_session_preserve_fd(session, iommufd, IOMMUFD_TOKEN); - test_luo_session_preserve_fd(session, cdev_fd, CDEV_TOKEN); + /* + * Batch without iommufd: memfd is preserved first, then cdev fails. + * The whole batch must be rolled back, including the memfd. + */ + fds[0] = cdev_fd; + tokens[0] = CDEV_TOKEN; + fds[1] = memfd; + tokens[1] = MEMFD_TOKEN; + if (!luo_session_preserve_fds(session, fds, tokens, 2, &failed)) + fail_exit("Batch preserve without iommufd should fail"); + ksft_assert(failed == 0); + + /* Full batch, passed in reverse dependency order. */ + fds[0] = cdev_fd; + tokens[0] = CDEV_TOKEN; + fds[1] = iommufd; + tokens[1] = IOMMUFD_TOKEN; + fds[2] = memfd; + tokens[2] = MEMFD_TOKEN; + if (luo_session_preserve_fds(session, fds, tokens, 3, &failed)) + fail_exit("Batch preserve failed at index %u", failed); close(session); session = luo_create_session(luo_fd, iommufd_session); -- 2.56.0.rc1.315.gc6ed9934b7-goog