Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Joe Damato | 1268 | 99.92% | 1 | 50.00% |
Colin Ian King | 1 | 0.08% | 1 | 50.00% |
Total | 1269 | 2 |
// SPDX-License-Identifier: GPL-2.0-or-later /* Basic per-epoll context busy poll test. * * Only tests the ioctls, but should be expanded to test two connected hosts in * the future */ #define _GNU_SOURCE #include <error.h> #include <errno.h> #include <inttypes.h> #include <limits.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/capability.h> #include <sys/epoll.h> #include <sys/ioctl.h> #include <sys/socket.h> #include "../kselftest_harness.h" /* if the headers haven't been updated, we need to define some things */ #if !defined(EPOLL_IOC_TYPE) struct epoll_params { uint32_t busy_poll_usecs; uint16_t busy_poll_budget; uint8_t prefer_busy_poll; /* pad the struct to a multiple of 64bits */ uint8_t __pad; }; #define EPOLL_IOC_TYPE 0x8A #define EPIOCSPARAMS _IOW(EPOLL_IOC_TYPE, 0x01, struct epoll_params) #define EPIOCGPARAMS _IOR(EPOLL_IOC_TYPE, 0x02, struct epoll_params) #endif FIXTURE(invalid_fd) { int invalid_fd; struct epoll_params params; }; FIXTURE_SETUP(invalid_fd) { int ret; ret = socket(AF_UNIX, SOCK_DGRAM, 0); EXPECT_NE(-1, ret) TH_LOG("error creating unix socket"); self->invalid_fd = ret; } FIXTURE_TEARDOWN(invalid_fd) { int ret; ret = close(self->invalid_fd); EXPECT_EQ(0, ret); } TEST_F(invalid_fd, test_invalid_fd) { int ret; ret = ioctl(self->invalid_fd, EPIOCGPARAMS, &self->params); EXPECT_EQ(-1, ret) TH_LOG("EPIOCGPARAMS on invalid epoll FD should error"); EXPECT_EQ(ENOTTY, errno) TH_LOG("EPIOCGPARAMS on invalid epoll FD should set errno to ENOTTY"); memset(&self->params, 0, sizeof(struct epoll_params)); ret = ioctl(self->invalid_fd, EPIOCSPARAMS, &self->params); EXPECT_EQ(-1, ret) TH_LOG("EPIOCSPARAMS on invalid epoll FD should error"); EXPECT_EQ(ENOTTY, errno) TH_LOG("EPIOCSPARAMS on invalid epoll FD should set errno to ENOTTY"); } FIXTURE(epoll_busy_poll) { int fd; struct epoll_params params; struct epoll_params *invalid_params; cap_t caps; }; FIXTURE_SETUP(epoll_busy_poll) { int ret; ret = epoll_create1(0); EXPECT_NE(-1, ret) TH_LOG("epoll_create1 failed?"); self->fd = ret; self->caps = cap_get_proc(); EXPECT_NE(NULL, self->caps); } FIXTURE_TEARDOWN(epoll_busy_poll) { int ret; ret = close(self->fd); EXPECT_EQ(0, ret); ret = cap_free(self->caps); EXPECT_NE(-1, ret) TH_LOG("unable to free capabilities"); } TEST_F(epoll_busy_poll, test_get_params) { /* begin by getting the epoll params from the kernel * * the default should be default and all fields should be zero'd by the * kernel, so set params fields to garbage to test this. */ int ret = 0; self->params.busy_poll_usecs = 0xff; self->params.busy_poll_budget = 0xff; self->params.prefer_busy_poll = 1; self->params.__pad = 0xf; ret = ioctl(self->fd, EPIOCGPARAMS, &self->params); EXPECT_EQ(0, ret) TH_LOG("ioctl EPIOCGPARAMS should succeed"); EXPECT_EQ(0, self->params.busy_poll_usecs) TH_LOG("EPIOCGPARAMS busy_poll_usecs should have been 0"); EXPECT_EQ(0, self->params.busy_poll_budget) TH_LOG("EPIOCGPARAMS busy_poll_budget should have been 0"); EXPECT_EQ(0, self->params.prefer_busy_poll) TH_LOG("EPIOCGPARAMS prefer_busy_poll should have been 0"); EXPECT_EQ(0, self->params.__pad) TH_LOG("EPIOCGPARAMS __pad should have been 0"); self->invalid_params = (struct epoll_params *)0xdeadbeef; ret = ioctl(self->fd, EPIOCGPARAMS, self->invalid_params); EXPECT_EQ(-1, ret) TH_LOG("EPIOCGPARAMS should error with invalid params"); EXPECT_EQ(EFAULT, errno) TH_LOG("EPIOCGPARAMS with invalid params should set errno to EFAULT"); } TEST_F(epoll_busy_poll, test_set_invalid) { int ret; memset(&self->params, 0, sizeof(struct epoll_params)); self->params.__pad = 1; ret = ioctl(self->fd, EPIOCSPARAMS, &self->params); EXPECT_EQ(-1, ret) TH_LOG("EPIOCSPARAMS non-zero __pad should error"); EXPECT_EQ(EINVAL, errno) TH_LOG("EPIOCSPARAMS non-zero __pad errno should be EINVAL"); self->params.__pad = 0; self->params.busy_poll_usecs = (uint32_t)INT_MAX + 1; ret = ioctl(self->fd, EPIOCSPARAMS, &self->params); EXPECT_EQ(-1, ret) TH_LOG("EPIOCSPARAMS should error busy_poll_usecs > S32_MAX"); EXPECT_EQ(EINVAL, errno) TH_LOG("EPIOCSPARAMS busy_poll_usecs > S32_MAX errno should be EINVAL"); self->params.__pad = 0; self->params.busy_poll_usecs = 32; self->params.prefer_busy_poll = 2; ret = ioctl(self->fd, EPIOCSPARAMS, &self->params); EXPECT_EQ(-1, ret) TH_LOG("EPIOCSPARAMS should error prefer_busy_poll > 1"); EXPECT_EQ(EINVAL, errno) TH_LOG("EPIOCSPARAMS prefer_busy_poll > 1 errno should be EINVAL"); self->params.__pad = 0; self->params.busy_poll_usecs = 32; self->params.prefer_busy_poll = 1; /* set budget well above kernel's NAPI_POLL_WEIGHT of 64 */ self->params.busy_poll_budget = UINT16_MAX; /* test harness should run with CAP_NET_ADMIN, but let's make sure */ cap_flag_value_t tmp; ret = cap_get_flag(self->caps, CAP_NET_ADMIN, CAP_EFFECTIVE, &tmp); EXPECT_EQ(0, ret) TH_LOG("unable to get CAP_NET_ADMIN cap flag"); EXPECT_EQ(CAP_SET, tmp) TH_LOG("expecting CAP_NET_ADMIN to be set for the test harness"); /* at this point we know CAP_NET_ADMIN is available, so setting the * params with a busy_poll_budget > NAPI_POLL_WEIGHT should succeed */ ret = ioctl(self->fd, EPIOCSPARAMS, &self->params); EXPECT_EQ(0, ret) TH_LOG("EPIOCSPARAMS should allow busy_poll_budget > NAPI_POLL_WEIGHT"); /* remove CAP_NET_ADMIN from our effective set */ cap_value_t net_admin[] = { CAP_NET_ADMIN }; ret = cap_set_flag(self->caps, CAP_EFFECTIVE, 1, net_admin, CAP_CLEAR); EXPECT_EQ(0, ret) TH_LOG("couldn't clear CAP_NET_ADMIN"); ret = cap_set_proc(self->caps); EXPECT_EQ(0, ret) TH_LOG("cap_set_proc should drop CAP_NET_ADMIN"); /* this is now expected to fail */ ret = ioctl(self->fd, EPIOCSPARAMS, &self->params); EXPECT_EQ(-1, ret) TH_LOG("EPIOCSPARAMS should error busy_poll_budget > NAPI_POLL_WEIGHT"); EXPECT_EQ(EPERM, errno) TH_LOG("EPIOCSPARAMS errno should be EPERM busy_poll_budget > NAPI_POLL_WEIGHT"); /* restore CAP_NET_ADMIN to our effective set */ ret = cap_set_flag(self->caps, CAP_EFFECTIVE, 1, net_admin, CAP_SET); EXPECT_EQ(0, ret) TH_LOG("couldn't restore CAP_NET_ADMIN"); ret = cap_set_proc(self->caps); EXPECT_EQ(0, ret) TH_LOG("cap_set_proc should set CAP_NET_ADMIN"); self->invalid_params = (struct epoll_params *)0xdeadbeef; ret = ioctl(self->fd, EPIOCSPARAMS, self->invalid_params); EXPECT_EQ(-1, ret) TH_LOG("EPIOCSPARAMS should error when epoll_params is invalid"); EXPECT_EQ(EFAULT, errno) TH_LOG("EPIOCSPARAMS should set errno to EFAULT when epoll_params is invalid"); } TEST_F(epoll_busy_poll, test_set_and_get_valid) { int ret; memset(&self->params, 0, sizeof(struct epoll_params)); self->params.busy_poll_usecs = 25; self->params.busy_poll_budget = 16; self->params.prefer_busy_poll = 1; ret = ioctl(self->fd, EPIOCSPARAMS, &self->params); EXPECT_EQ(0, ret) TH_LOG("EPIOCSPARAMS with valid params should not error"); /* check that the kernel returns the same values back */ memset(&self->params, 0, sizeof(struct epoll_params)); ret = ioctl(self->fd, EPIOCGPARAMS, &self->params); EXPECT_EQ(0, ret) TH_LOG("EPIOCGPARAMS should not error"); EXPECT_EQ(25, self->params.busy_poll_usecs) TH_LOG("params.busy_poll_usecs incorrect"); EXPECT_EQ(16, self->params.busy_poll_budget) TH_LOG("params.busy_poll_budget incorrect"); EXPECT_EQ(1, self->params.prefer_busy_poll) TH_LOG("params.prefer_busy_poll incorrect"); EXPECT_EQ(0, self->params.__pad) TH_LOG("params.__pad was not 0"); } TEST_F(epoll_busy_poll, test_invalid_ioctl) { int invalid_ioctl = EPIOCGPARAMS + 10; int ret; ret = ioctl(self->fd, invalid_ioctl, &self->params); EXPECT_EQ(-1, ret) TH_LOG("invalid ioctl should return error"); EXPECT_EQ(EINVAL, errno) TH_LOG("invalid ioctl should set errno to EINVAL"); } TEST_HARNESS_MAIN
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