From 7bad5527e2bcaf8514a54e1aaed3e90c1a065505 Mon Sep 17 00:00:00 2001 From: Zorro Lang Date: Tue, 12 Mar 2024 00:20:28 +0800 Subject: fsstress: bypass io_uring testing if io_uring_queue_init returns EPERM I found the io_uring testing still fails as: io_uring_queue_init failed even if kernel supports io_uring feature. That because of the /proc/sys/kernel/io_uring_disabled isn't 0. Different value means: 0 All processes can create io_uring instances as normal. 1 io_uring creation is disabled (io_uring_setup() will fail with -EPERM) for unprivileged processes not in the io_uring_group group. Existing io_uring instances can still be used. See the documentation for io_uring_group for more information. 2 io_uring creation is disabled for all processes. io_uring_setup() always fails with -EPERM. Existing io_uring instances can still be used. So besides the CONFIG_IO_URING kernel config, there's another switch can on or off the io_uring supporting. And the "2" or "1" might be the default on some systems. On this situation the io_uring_queue_init returns -EPERM, so I change the fsstress to ignore io_uring testing if io_uring_queue_init returns -ENOSYS or -EPERM. And print different verbose message for debug. Signed-off-by: Zorro Lang Reviewed-by: "Darrick J. Wong" Reviewed-by: Jeff Moyer --- ltp/fsstress.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/ltp/fsstress.c b/ltp/fsstress.c index 4fc50efb9b..9d2631f7f9 100644 --- a/ltp/fsstress.c +++ b/ltp/fsstress.c @@ -762,7 +762,12 @@ int main(int argc, char **argv) #endif #ifdef URING have_io_uring = true; - /* If ENOSYS, just ignore uring, other errors are fatal. */ + /* + * If ENOSYS, just ignore uring, due to kernel doesn't support it. + * If EPERM, maybe due to sysctl kernel.io_uring_disabled isn't 0, + * or some selinux policies, etc. + * Other errors are fatal. + */ c = io_uring_queue_init(URING_ENTRIES, &ring, 0); switch(c){ case 0: @@ -770,9 +775,16 @@ int main(int argc, char **argv) break; case -ENOSYS: have_io_uring = false; + if (verbose) + printf("io_uring isn't supported by kernel\n"); + break; + case -EPERM: + have_io_uring = false; + if (verbose) + printf("io_uring isn't allowed, check io_uring_disabled sysctl or selinux policy\n"); break; default: - fprintf(stderr, "io_uring_queue_init failed\n"); + fprintf(stderr, "io_uring_queue_init failed, errno=%d\n", -c); exit(1); } #endif -- cgit 1.2.3-korg