July 2025 - Linux-kselftest-mirror

[PATCH] tools/nolibc: add support for clock_nanosleep() and nanosleep()

by Thomas Weißschuh

Also add some tests. Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> --- tools/include/nolibc/time.h | 34 ++++++++++++++++++++++++++++ tools/testing/selftests/nolibc/nolibc-test.c | 1 + 2 files changed, 35 insertions(+) diff --git a/tools/include/nolibc/time.h b/tools/include/nolibc/time.h index fc387940d51f389d4233bd5712588dced31ae6e5..d02bc44d2643a5e39afa808841f7175bfab5ff7e 100644 --- a/tools/include/nolibc/time.h +++ b/tools/include/nolibc/time.h @@ -36,6 +36,8 @@ void __nolibc_timespec_kernel_to_user(const struct __kernel_timespec *kts, struc * int clock_getres(clockid_t clockid, struct timespec *res); * int clock_gettime(clockid_t clockid, struct timespec *tp); * int clock_settime(clockid_t clockid, const struct timespec *tp); + * int clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp, + * struct timespec *rmtp) */ static __attribute__((unused)) @@ -107,6 +109,32 @@ int clock_settime(clockid_t clockid, struct timespec *tp) return __sysret(sys_clock_settime(clockid, tp)); } +static __attribute__((unused)) +int sys_clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp, + struct timespec *rmtp) +{ +#if defined(__NR_clock_nanosleep) + return my_syscall4(__NR_clock_nanosleep, clockid, flags, rqtp, rmtp); +#elif defined(__NR_clock_nanosleep_time64) + struct __kernel_timespec krqtp, krmtp; + int ret; + + __nolibc_timespec_user_to_kernel(rqtp, &krqtp); + ret = my_syscall4(__NR_clock_nanosleep_time64, clockid, flags, &krqtp, &krmtp); + if (rmtp) + __nolibc_timespec_kernel_to_user(&krmtp, rmtp); + return ret; +#else + return __nolibc_enosys(__func__, clockid, flags, rqtp, rmtp); +#endif +} + +static __attribute__((unused)) +int clock_nanosleep(clockid_t clockid, int flags, const struct timespec *rqtp, + struct timespec *rmtp) +{ + return __sysret(sys_clock_nanosleep(clockid, flags, rqtp, rmtp)); +} static __inline__ double difftime(time_t time1, time_t time2) @@ -114,6 +142,12 @@ double difftime(time_t time1, time_t time2) return time1 - time2; } +static __inline__ +int nanosleep(const struct timespec *rqtp, struct timespec *rmtp) +{ + return clock_nanosleep(CLOCK_REALTIME, 0, rqtp, rmtp); +} + static __attribute__((unused)) time_t time(time_t *tptr) diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index b5bca1dcf36e95a576ca9ffba4f7c213978a3f35..315229233930265501296dfeb9bc2838bb6fef84 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -1363,6 +1363,7 @@ int run_syscall(int min, int max) CASE_TEST(mmap_bad); EXPECT_PTRER(1, mmap(NULL, 0, PROT_READ, MAP_PRIVATE, 0, 0), MAP_FAILED, EINVAL); break; CASE_TEST(munmap_bad); EXPECT_SYSER(1, munmap(NULL, 0), -1, EINVAL); break; CASE_TEST(mmap_munmap_good); EXPECT_SYSZR(1, test_mmap_munmap()); break; + CASE_TEST(nanosleep); ts.tv_nsec = -1; EXPECT_SYSER(1, nanosleep(&ts, NULL), -1, EINVAL); break; CASE_TEST(open_tty); EXPECT_SYSNE(1, tmp = open("/dev/null", O_RDONLY), -1); if (tmp != -1) close(tmp); break; CASE_TEST(open_blah); EXPECT_SYSER(1, tmp = open("/proc/self/blah", O_RDONLY), -1, ENOENT); if (tmp != -1) close(tmp); break; CASE_TEST(openat_dir); EXPECT_SYSZR(1, test_openat()); break; --- base-commit: 1536aa0fb1e09cb50f401ec4852c60f38173d751 change-id: 20250704-nolibc-nanosleep-2476b806b0d5 Best regards, -- Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>

3 months

3
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[PATCH v2] selftests: futex: define SYS_futex on 32-bit architectures with 64-bit time_t

by Ben Zong-You Xie

glibc does not define SYS_futex for 32-bit architectures using 64-bit time_t e.g. riscv32, therefore this test fails to compile since it does not find SYS_futex in C library headers. Define SYS_futex as SYS_futex_time64 in this situation to ensure successful compilation and compatibility. Signed-off-by: Cynthia Huang <cynthia(a)andestech.com> Signed-off-by: Ben Zong-You Xie <ben717(a)andestech.com> --- Changes since v1: - Fix the SOB chain v1 : https://lore.kernel.org/all/20250527093536.3646143-1-ben717@andestech.com/ --- tools/testing/selftests/futex/include/futextest.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/tools/testing/selftests/futex/include/futextest.h b/tools/testing/selftests/futex/include/futextest.h index ddbcfc9b7bac..7a5fd1d5355e 100644 --- a/tools/testing/selftests/futex/include/futextest.h +++ b/tools/testing/selftests/futex/include/futextest.h @@ -47,6 +47,17 @@ typedef volatile u_int32_t futex_t; FUTEX_PRIVATE_FLAG) #endif +/* + * SYS_futex is expected from system C library, in glibc some 32-bit + * architectures (e.g. RV32) are using 64-bit time_t, therefore it doesn't have + * SYS_futex defined but just SYS_futex_time64. Define SYS_futex as + * SYS_futex_time64 in this situation to ensure the compilation and the + * compatibility. + */ +#if !defined(SYS_futex) && defined(SYS_futex_time64) +#define SYS_futex SYS_futex_time64 +#endif + /** * futex() - SYS_futex syscall wrapper * @uaddr: address of first futex -- 2.34.1

3 months

3
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[PATCH 0/2] selftests/nolibc: correctly report errors from printf() and friends

by Thomas Weißschuh

When an error is encountered by printf() it needs to be reported. Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> --- Thomas Weißschuh (2): selftests/nolibc: create /dev/full when running as PID 1 selftests/nolibc: correctly report errors from printf() and friends tools/include/nolibc/stdio.h | 4 ++-- tools/testing/selftests/nolibc/nolibc-test.c | 27 ++++++++++++++++++++++++++- 2 files changed, 28 insertions(+), 3 deletions(-) --- base-commit: 1536aa0fb1e09cb50f401ec4852c60f38173d751 change-id: 20250704-nolibc-printf-error-aa54f951c0a4 Best regards, -- Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>

3 months

2
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[PATCH v13 0/5] rust: replace kernel::str::CStr w/ core::ffi::CStr

by Tamir Duberstein

This picks up from Michal Rostecki's work[0]. Per Michal's guidance I have omitted Co-authored tags, as the end result is quite different. Link: https://lore.kernel.org/rust-for-linux/20240819153656.28807-2-vadorovsky@pr… [0] Closes: https://github.com/Rust-for-Linux/linux/issues/1075 Signed-off-by: Tamir Duberstein <tamird(a)gmail.com> --- Changes in v13: - Rebase on v6.16-rc4. - Link to v12: https://lore.kernel.org/r/20250619-cstr-core-v12-0-80c9c7b45900@gmail.com Changes in v12: - Introduce `kernel::fmt::Display` to allow implementations on foreign types. - Tidy up doc comment on `str_to_cstr`. (Alice Ryhl). - Link to v11: https://lore.kernel.org/r/20250530-cstr-core-v11-0-cd9c0cbcb902@gmail.com Changes in v11: - Use `quote_spanned!` to avoid `use<'a, T>` and generally reduce manual token construction. - Add a commit to simplify `quote_spanned!`. - Drop first commit in favor of https://lore.kernel.org/rust-for-linux/20240906164448.2268368-1-paddymills@…. (Miguel Ojeda) - Correctly handle expressions such as `pr_info!("{a}", a = a = a)`. (Benno Lossin) - Avoid dealing with `}}` escapes, which is not needed. (Benno Lossin) - Revert some unnecessary changes. (Benno Lossin) - Rename `c_str_avoid_literals!` to `str_to_cstr!`. (Benno Lossin & Alice Ryhl). - Link to v10: https://lore.kernel.org/r/20250524-cstr-core-v10-0-6412a94d9d75@gmail.com Changes in v10: - Rebase on cbeaa41dfe26b72639141e87183cb23e00d4b0dd. - Implement Alice's suggestion to use a proc macro to work around orphan rules otherwise preventing `core::ffi::CStr` to be directly printed with `{}`. - Link to v9: https://lore.kernel.org/r/20250317-cstr-core-v9-0-51d6cc522f62@gmail.com Changes in v9: - Rebase on rust-next. - Restore `impl Display for BStr` which exists upstream[1]. - Link: https://doc.rust-lang.org/nightly/std/bstr/struct.ByteStr.html#impl-Display… [1] - Link to v8: https://lore.kernel.org/r/20250203-cstr-core-v8-0-cb3f26e78686@gmail.com Changes in v8: - Move `{from,as}_char_ptr` back to `CStrExt`. This reduces the diff some. - Restore `from_bytes_with_nul_unchecked_mut`, `to_cstring`. - Link to v7: https://lore.kernel.org/r/20250202-cstr-core-v7-0-da1802520438@gmail.com Changes in v7: - Rebased on mainline. - Restore functionality added in commit a321f3ad0a5d ("rust: str: add {make,to}_{upper,lower}case() to CString"). - Used `diff.algorithm patience` to improve diff readability. - Link to v6: https://lore.kernel.org/r/20250202-cstr-core-v6-0-8469cd6d29fd@gmail.com Changes in v6: - Split the work into several commits for ease of review. - Restore `{from,as}_char_ptr` to allow building on ARM (see commit message). - Add `CStrExt` to `kernel::prelude`. (Alice Ryhl) - Remove `CStrExt::from_bytes_with_nul_unchecked_mut` and restore `DerefMut for CString`. (Alice Ryhl) - Rename and hide `kernel::c_str!` to encourage use of C-String literals. - Drop implementation and invocation changes in kunit.rs. (Trevor Gross) - Drop docs on `Display` impl. (Trevor Gross) - Rewrite docs in the style of the standard library. - Restore the `test_cstr_debug` unit tests to demonstrate that the implementation has changed. Changes in v5: - Keep the `test_cstr_display*` unit tests. Changes in v4: - Provide the `CStrExt` trait with `display()` method, which returns a `CStrDisplay` wrapper with `Display` implementation. This addresses the lack of `Display` implementation for `core::ffi::CStr`. - Provide `from_bytes_with_nul_unchecked_mut()` method in `CStrExt`, which might be useful and is going to prevent manual, unsafe casts. - Fix a typo (s/preffered/prefered/). Changes in v3: - Fix the commit message. - Remove redundant braces in `use`, when only one item is imported. Changes in v2: - Do not remove `c_str` macro. While it's preferred to use C-string literals, there are two cases where `c_str` is helpful: - When working with macros, which already return a Rust string literal (e.g. `stringify!`). - When building macros, where we want to take a Rust string literal as an argument (for caller's convenience), but still use it as a C-string internally. - Use Rust literals as arguments in macros (`new_mutex`, `new_condvar`, `new_mutex`). Use the `c_str` macro to convert these literals to C-string literals. - Use `c_str` in kunit.rs for converting the output of `stringify!` to a `CStr`. - Remove `DerefMut` implementation for `CString`. --- Tamir Duberstein (5): rust: macros: reduce collections in `quote!` macro rust: support formatting of foreign types rust: replace `CStr` with `core::ffi::CStr` rust: replace `kernel::c_str!` with C-Strings rust: remove core::ffi::CStr reexport drivers/block/rnull.rs | 4 +- drivers/cpufreq/rcpufreq_dt.rs | 5 +- drivers/gpu/drm/drm_panic_qr.rs | 5 +- drivers/gpu/drm/nova/driver.rs | 10 +- drivers/gpu/nova-core/driver.rs | 6 +- drivers/gpu/nova-core/firmware.rs | 2 +- drivers/gpu/nova-core/gpu.rs | 4 +- drivers/gpu/nova-core/nova_core.rs | 2 +- drivers/net/phy/ax88796b_rust.rs | 8 +- drivers/net/phy/qt2025.rs | 6 +- rust/kernel/auxiliary.rs | 6 +- rust/kernel/block/mq.rs | 2 +- rust/kernel/clk.rs | 9 +- rust/kernel/configfs.rs | 14 +- rust/kernel/cpufreq.rs | 6 +- rust/kernel/device.rs | 9 +- rust/kernel/devres.rs | 2 +- rust/kernel/driver.rs | 4 +- rust/kernel/drm/device.rs | 4 +- rust/kernel/drm/driver.rs | 3 +- rust/kernel/drm/ioctl.rs | 2 +- rust/kernel/error.rs | 10 +- rust/kernel/faux.rs | 5 +- rust/kernel/firmware.rs | 16 +- rust/kernel/fmt.rs | 89 +++++++ rust/kernel/kunit.rs | 28 +-- rust/kernel/lib.rs | 3 +- rust/kernel/miscdevice.rs | 5 +- rust/kernel/net/phy.rs | 12 +- rust/kernel/of.rs | 5 +- rust/kernel/pci.rs | 2 +- rust/kernel/platform.rs | 6 +- rust/kernel/prelude.rs | 5 +- rust/kernel/print.rs | 4 +- rust/kernel/seq_file.rs | 6 +- rust/kernel/str.rs | 444 ++++++++++------------------------ rust/kernel/sync.rs | 7 +- rust/kernel/sync/completion.rs | 2 +- rust/kernel/sync/condvar.rs | 4 +- rust/kernel/sync/lock.rs | 4 +- rust/kernel/sync/lock/global.rs | 6 +- rust/kernel/sync/poll.rs | 1 + rust/kernel/workqueue.rs | 9 +- rust/macros/fmt.rs | 99 ++++++++ rust/macros/kunit.rs | 10 +- rust/macros/lib.rs | 19 ++ rust/macros/module.rs | 2 +- rust/macros/quote.rs | 111 ++++----- samples/rust/rust_configfs.rs | 9 +- samples/rust/rust_driver_auxiliary.rs | 7 +- samples/rust/rust_driver_faux.rs | 4 +- samples/rust/rust_driver_pci.rs | 4 +- samples/rust/rust_driver_platform.rs | 4 +- samples/rust/rust_misc_device.rs | 3 +- scripts/rustdoc_test_gen.rs | 6 +- 55 files changed, 543 insertions(+), 521 deletions(-) --- base-commit: 769e324b66b0d92d04f315d0c45a0f72737c7494 change-id: 20250201-cstr-core-d4b9b69120cf Best regards, -- Tamir Duberstein <tamird(a)gmail.com>

3 months, 1 week

4
32
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[PATCH v5] selftests/futex: Convert 32bit timespec struct to 64bit version for 32bit compatibility mode

by Terry Tritton

sys_futex_wait() can not accept old_timespec32 struct, so userspace should convert it from 32bit to 64bit before syscall to support 32bit compatible mode. This fix is based off [1] Link: https://lore.kernel.org/all/20231203235117.29677-1-wegao@suse.com/ [1] Originally-by: Wei Gao <wegao(a)suse.com> Signed-off-by: Terry Tritton <terry.tritton(a)linaro.org> --- Changes in v5: - Fixed checkpatch errors Changes in v4: - Change to use __kernel_timespec as suggested by tglx Changes in v3: - Fix signed-off-by chain but for real this time Changes in v2: - Fix signed-off-by chain tools/testing/selftests/futex/include/futex2test.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/futex/include/futex2test.h b/tools/testing/selftests/futex/include/futex2test.h index ea79662405bc..ff9eebcc270c 100644 --- a/tools/testing/selftests/futex/include/futex2test.h +++ b/tools/testing/selftests/futex/include/futex2test.h @@ -5,6 +5,7 @@ * Copyright 2021 Collabora Ltd. */ #include <stdint.h> +#include <linux/time_types.h> #define u64_to_ptr(x) ((void *)(uintptr_t)(x)) @@ -65,7 +66,12 @@ struct futex32_numa { static inline int futex_waitv(volatile struct futex_waitv *waiters, unsigned long nr_waiters, unsigned long flags, struct timespec *timo, clockid_t clockid) { - return syscall(__NR_futex_waitv, waiters, nr_waiters, flags, timo, clockid); + struct __kernel_timespec ts = { + .tv_sec = timo->tv_sec, + .tv_nsec = timo->tv_nsec, + }; + + return syscall(__NR_futex_waitv, waiters, nr_waiters, flags, &ts, clockid); } /* -- 2.39.5

3 months, 1 week

1
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[PATCH v4] selftests/futex: Convert 32bit timespec struct to 64bit version for 32bit compatibility mode

by Terry Tritton

sys_futex_wait() can not accept old_timespec32 struct, so userspace should convert it from 32bit to 64bit before syscall to support 32bit compatible mode. This fix is based off [1] Link: https://lore.kernel.org/all/20231203235117.29677-1-wegao@suse.com/ [1] Originally-by: Wei Gao <wegao(a)suse.com> Signed-off-by: Terry Tritton <terry.tritton(a)linaro.org> --- Changes in v4: - Change to use __kernel_timespec as suggested by tglx Changes in v3: - Fix signed-off-by chain but for real this time Changes in v2: - Fix signed-off-by chain tools/testing/selftests/futex/include/futex2test.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/futex/include/futex2test.h b/tools/testing/selftests/futex/include/futex2test.h index ea79662405bc..af5b92ba04ad 100644 --- a/tools/testing/selftests/futex/include/futex2test.h +++ b/tools/testing/selftests/futex/include/futex2test.h @@ -5,6 +5,7 @@ * Copyright 2021 Collabora Ltd. */ #include <stdint.h> +#include <linux/time_types.h> #define u64_to_ptr(x) ((void *)(uintptr_t)(x)) @@ -65,7 +66,12 @@ struct futex32_numa { static inline int futex_waitv(volatile struct futex_waitv *waiters, unsigned long nr_waiters, unsigned long flags, struct timespec *timo, clockid_t clockid) { - return syscall(__NR_futex_waitv, waiters, nr_waiters, flags, timo, clockid); + struct __kernel_timespec ts = { + .tv_sec = timo->tv_sec, + .tv_nsec = timo->tv_nsec, + }; + + return syscall(__NR_futex_waitv, waiters, nr_waiters, flags, &ts, clockid); } /* -- 2.39.5

3 months, 1 week

2
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[PATCH net-next v4] ipv6: add `force_forwarding` sysctl to enable per-interface forwarding

by Gabriel Goller

It is currently impossible to enable ipv6 forwarding on a per-interface basis like in ipv4. To enable forwarding on an ipv6 interface we need to enable it on all interfaces and disable it on the other interfaces using a netfilter rule. This is especially cumbersome if you have lots of interface and only want to enable forwarding on a few. According to the sysctl docs [0] the `net.ipv6.conf.all.forwarding` enables forwarding for all interfaces, while the interface-specific `net.ipv6.conf.<interface>.forwarding` configures the interface Host/Router configuration. Introduce a new sysctl flag `force_forwarding`, which can be set on every interface. The ip6_forwarding function will then check if the global forwarding flag OR the force_forwarding flag is active and forward the packet. To preserver backwards-compatibility reset the flag (on all interfaces) to 0 if the net.ipv6.conf.all.forwarding flag is set to 0. Add a short selftest that checks if a packet gets forwarded with and without `force_forwarding`. [0]: https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt Signed-off-by: Gabriel Goller <g.goller(a)proxmox.com> --- First time writing a selftest, so LMK if I did something wrong or if there is something I can improve. Thanks! v4: * actually write the sysctl value to the table * use ASSERT_RTNL() when forwarding the sysctl change * remove useless comments in function body * simplify forwarding and force_forwarding check in ip6_output.c * fix code backticks in Documentation (double instead of single) * add selftests v3: https://lore.kernel.org/netdev/20250702074619.139031-1-g.goller@proxmox.com/ * remove forwarding=0 setting force_forwarding=0 globally. * add min and max (0 and 1) value to sysctl. v2: https://lore.kernel.org/netdev/20250701140423.487411-1-g.goller@proxmox.com/ * rename from `do_forwarding` to `force_forwarding`. * add global `force_forwarding` flag which will enable `force_forwarding` on every interface like the `ipv4.all.forwarding` flag. * `forwarding`=0 will disable global and per-interface `force_forwarding`. * export option as NETCONFA_FORCE_FORWARDING. v1: https://lore.kernel.org/netdev/20250702074619.139031-1-g.goller@proxmox.com/ Documentation/networking/ip-sysctl.rst | 5 + include/linux/ipv6.h | 1 + include/uapi/linux/ipv6.h | 1 + include/uapi/linux/netconf.h | 1 + include/uapi/linux/sysctl.h | 1 + net/ipv6/addrconf.c | 91 +++++++++++++++ net/ipv6/ip6_output.c | 3 +- tools/testing/selftests/net/Makefile | 1 + .../selftests/net/ipv6_force_forwarding.sh | 105 ++++++++++++++++++ 9 files changed, 208 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/net/ipv6_force_forwarding.sh diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst index 0f1251cce314..ec7fa1e890f1 100644 --- a/Documentation/networking/ip-sysctl.rst +++ b/Documentation/networking/ip-sysctl.rst @@ -2292,6 +2292,11 @@ conf/all/forwarding - BOOLEAN proxy_ndp - BOOLEAN Do proxy ndp. +force_forwarding - BOOLEAN + Enable forwarding on this interface only -- regardless of the setting on + ``conf/all/forwarding``. When setting ``conf.all.forwarding`` to 0, + the ``force_forwarding`` flag will be reset on all interfaces. + fwmark_reflect - BOOLEAN Controls the fwmark of kernel-generated IPv6 reply packets that are not associated with a socket for example, TCP RSTs or ICMPv6 echo replies). diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h index 5aeeed22f35b..5380107e466c 100644 --- a/include/linux/ipv6.h +++ b/include/linux/ipv6.h @@ -19,6 +19,7 @@ struct ipv6_devconf { __s32 forwarding; __s32 disable_policy; __s32 proxy_ndp; + __s32 force_forwarding; __cacheline_group_end(ipv6_devconf_read_txrx); __s32 accept_ra; diff --git a/include/uapi/linux/ipv6.h b/include/uapi/linux/ipv6.h index cf592d7b630f..d4d3ae774b26 100644 --- a/include/uapi/linux/ipv6.h +++ b/include/uapi/linux/ipv6.h @@ -199,6 +199,7 @@ enum { DEVCONF_NDISC_EVICT_NOCARRIER, DEVCONF_ACCEPT_UNTRACKED_NA, DEVCONF_ACCEPT_RA_MIN_LFT, + DEVCONF_FORCE_FORWARDING, DEVCONF_MAX }; diff --git a/include/uapi/linux/netconf.h b/include/uapi/linux/netconf.h index fac4edd55379..1c8c84d65ae3 100644 --- a/include/uapi/linux/netconf.h +++ b/include/uapi/linux/netconf.h @@ -19,6 +19,7 @@ enum { NETCONFA_IGNORE_ROUTES_WITH_LINKDOWN, NETCONFA_INPUT, NETCONFA_BC_FORWARDING, + NETCONFA_FORCE_FORWARDING, __NETCONFA_MAX }; #define NETCONFA_MAX (__NETCONFA_MAX - 1) diff --git a/include/uapi/linux/sysctl.h b/include/uapi/linux/sysctl.h index 8981f00204db..63d1464cb71c 100644 --- a/include/uapi/linux/sysctl.h +++ b/include/uapi/linux/sysctl.h @@ -573,6 +573,7 @@ enum { NET_IPV6_ACCEPT_RA_FROM_LOCAL=26, NET_IPV6_ACCEPT_RA_RT_INFO_MIN_PLEN=27, NET_IPV6_RA_DEFRTR_METRIC=28, + NET_IPV6_FORCE_FORWARDING=29, __NET_IPV6_MAX }; diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index ba2ec7c870cc..dcf4e8bf8cf8 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -239,6 +239,7 @@ static struct ipv6_devconf ipv6_devconf __read_mostly = { .ndisc_evict_nocarrier = 1, .ra_honor_pio_life = 0, .ra_honor_pio_pflag = 0, + .force_forwarding = 0, }; static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { @@ -303,6 +304,7 @@ static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = { .ndisc_evict_nocarrier = 1, .ra_honor_pio_life = 0, .ra_honor_pio_pflag = 0, + .force_forwarding = 0, }; /* Check if link is ready: is it up and is a valid qdisc available */ @@ -857,6 +859,15 @@ static void addrconf_forward_change(struct net *net, __s32 newf) idev = __in6_dev_get_rtnl_net(dev); if (idev) { int changed = (!idev->cnf.forwarding) ^ (!newf); + /* + * With the introduction of force_forwarding, we need to be backwards + * compatible, so that means we need to set the force_forwarding flag + * on every interface to 0 if net.ipv6.conf.all.forwarding is set to 0. + * This allows the global forwarding flag to disable forwarding for + * all interfaces. + */ + if (newf == 0) + WRITE_ONCE(idev->cnf.force_forwarding, newf); WRITE_ONCE(idev->cnf.forwarding, newf); if (changed) @@ -5719,6 +5730,7 @@ static void ipv6_store_devconf(const struct ipv6_devconf *cnf, array[DEVCONF_ACCEPT_UNTRACKED_NA] = READ_ONCE(cnf->accept_untracked_na); array[DEVCONF_ACCEPT_RA_MIN_LFT] = READ_ONCE(cnf->accept_ra_min_lft); + array[DEVCONF_FORCE_FORWARDING] = READ_ONCE(cnf->force_forwarding); } static inline size_t inet6_ifla6_size(void) @@ -6747,6 +6759,78 @@ static int addrconf_sysctl_disable_policy(const struct ctl_table *ctl, int write return ret; } +static void addrconf_force_forward_change(struct net *net, __s32 newf) +{ + ASSERT_RTNL(); + struct net_device *dev; + struct inet6_dev *idev; + + for_each_netdev(net, dev) { + idev = __in6_dev_get_rtnl_net(dev); + if (idev) { + int changed = (!idev->cnf.force_forwarding) ^ (!newf); + + WRITE_ONCE(idev->cnf.force_forwarding, newf); + if (changed) { + inet6_netconf_notify_devconf(dev_net(dev), RTM_NEWNETCONF, + NETCONFA_FORCE_FORWARDING, + dev->ifindex, &idev->cnf); + } + } + } +} + +static int addrconf_sysctl_force_forwarding(const struct ctl_table *ctl, int write, + void *buffer, size_t *lenp, loff_t *ppos) +{ + struct inet6_dev *idev = ctl->extra1; + struct net *net = ctl->extra2; + int *valp = ctl->data; + loff_t pos = *ppos; + int new_val = *valp; + int old_val = *valp; + int ret; + + struct ctl_table tmp_ctl = *ctl; + + tmp_ctl.extra1 = SYSCTL_ZERO; + tmp_ctl.extra2 = SYSCTL_ONE; + tmp_ctl.data = &new_val; + + ret = proc_douintvec_minmax(&tmp_ctl, write, buffer, lenp, ppos); + + if (write && old_val != new_val) { + if (!rtnl_net_trylock(net)) + return restart_syscall(); + + if (valp == &net->ipv6.devconf_dflt->force_forwarding) { + inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, + NETCONFA_FORCE_FORWARDING, + NETCONFA_IFINDEX_DEFAULT, + net->ipv6.devconf_dflt); + } else if (valp == &net->ipv6.devconf_all->force_forwarding) { + inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, + NETCONFA_FORCE_FORWARDING, + NETCONFA_IFINDEX_ALL, + net->ipv6.devconf_all); + + addrconf_force_forward_change(net, new_val); + } else { + inet6_netconf_notify_devconf(net, RTM_NEWNETCONF, + NETCONFA_FORCE_FORWARDING, + idev->dev->ifindex, + &idev->cnf); + } + rtnl_net_unlock(net); + } + + if (write) + WRITE_ONCE(*valp, new_val); + if (ret) + *ppos = pos; + return ret; +} + static int minus_one = -1; static const int two_five_five = 255; static u32 ioam6_if_id_max = U16_MAX; @@ -7217,6 +7301,13 @@ static const struct ctl_table addrconf_sysctl[] = { .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_TWO, }, + { + .procname = "force_forwarding", + .data = &ipv6_devconf.force_forwarding, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = addrconf_sysctl_force_forwarding, + }, }; static int __addrconf_sysctl_register(struct net *net, char *dev_name, diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 7bd29a9ff0db..440b9efced72 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -509,7 +509,8 @@ int ip6_forward(struct sk_buff *skb) u32 mtu; idev = __in6_dev_get_safely(dev_get_by_index_rcu(net, IP6CB(skb)->iif)); - if (READ_ONCE(net->ipv6.devconf_all->forwarding) == 0) + if (idev && !READ_ONCE(idev->cnf.force_forwarding) && + !READ_ONCE(net->ipv6.devconf_all->forwarding)) goto error; if (skb->pkt_type != PACKET_HOST) diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index 332f387615d7..f64ec8a15a77 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -112,6 +112,7 @@ TEST_PROGS += skf_net_off.sh TEST_GEN_FILES += skf_net_off TEST_GEN_FILES += tfo TEST_PROGS += tfo_passive.sh +TEST_PROGS += ipv6_force_forwarding.sh # YNL files, must be before "include ..lib.mk" YNL_GEN_FILES := busy_poller netlink-dumps diff --git a/tools/testing/selftests/net/ipv6_force_forwarding.sh b/tools/testing/selftests/net/ipv6_force_forwarding.sh new file mode 100644 index 000000000000..62adc9d4afc9 --- /dev/null +++ b/tools/testing/selftests/net/ipv6_force_forwarding.sh @@ -0,0 +1,105 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Test IPv6 force_forwarding interface property +# +# This test verifies that the force_forwarding property works correctly: +# - When global forwarding is disabled, packets are not forwarded normally +# - When force_forwarding is enabled on an interface, packets are forwarded +# regardless of the global forwarding setting + +source lib.sh + +cleanup() { + cleanup_ns $ns1 $ns2 $ns3 +} + +trap cleanup EXIT + +setup_test() { + # Create three namespaces: sender, router, receiver + setup_ns ns1 ns2 ns3 + + # Create veth pairs: ns1 <-> ns2 <-> ns3 + ip link add name veth12 type veth peer name veth21 + ip link add name veth23 type veth peer name veth32 + + # Move interfaces to namespaces + ip link set veth12 netns $ns1 + ip link set veth21 netns $ns2 + ip link set veth23 netns $ns2 + ip link set veth32 netns $ns3 + + # Configure interfaces + ip -n $ns1 addr add 2001:db8:1::1/64 dev veth12 + ip -n $ns2 addr add 2001:db8:1::2/64 dev veth21 + ip -n $ns2 addr add 2001:db8:2::1/64 dev veth23 + ip -n $ns3 addr add 2001:db8:2::2/64 dev veth32 + + # Bring up interfaces + ip -n $ns1 link set veth12 up + ip -n $ns2 link set veth21 up + ip -n $ns2 link set veth23 up + ip -n $ns3 link set veth32 up + + # Add routes + ip -n $ns1 route add 2001:db8:2::/64 via 2001:db8:1::2 + ip -n $ns3 route add 2001:db8:1::/64 via 2001:db8:2::1 + + # Disable global forwarding + ip netns exec $ns2 sysctl -qw net.ipv6.conf.all.forwarding=0 +} + +test_force_forwarding() { + local ret=0 + + echo "TEST: force_forwarding functionality" + + # Check if force_forwarding sysctl exists + if ! ip netns exec $ns2 test -f /proc/sys/net/ipv6/conf/veth21/force_forwarding; then + echo "SKIP: force_forwarding not available" + return $ksft_skip + fi + + # Test 1: Without force_forwarding, ping should fail + ip netns exec $ns2 sysctl -qw net.ipv6.conf.veth21.force_forwarding=0 + ip netns exec $ns2 sysctl -qw net.ipv6.conf.veth23.force_forwarding=0 + + if ip netns exec $ns1 ping -6 -c 1 -W 2 2001:db8:2::2 &>/dev/null; then + echo "FAIL: ping succeeded when forwarding disabled" + ret=1 + else + echo "PASS: forwarding disabled correctly" + fi + + # Test 2: With force_forwarding enabled, ping should succeed + ip netns exec $ns2 sysctl -qw net.ipv6.conf.veth21.force_forwarding=1 + ip netns exec $ns2 sysctl -qw net.ipv6.conf.veth23.force_forwarding=1 + + if ip netns exec $ns1 ping -6 -c 1 -W 2 2001:db8:2::2 &>/dev/null; then + echo "PASS: force_forwarding enabled forwarding" + else + echo "FAIL: ping failed with force_forwarding enabled" + ret=1 + fi + + return $ret +} + +echo "IPv6 force_forwarding test" +echo "==========================" + +setup_test +test_force_forwarding +ret=$? + +if [ $ret -eq 0 ]; then + echo "OK" + exit 0 +elif [ $ret -eq $ksft_skip ]; then + echo "SKIP" + exit $ksft_skip +else + echo "FAIL" + exit 1 +fi -- 2.39.5

3 months, 1 week

3
5
0 0

[PATCH v2] selftests/futex: Add futex_numa to .gitignore

by Terry Tritton

futex_numa was never added to the .gitignore file. Add it. Fixes: 9140f57c1c13 ("futex,selftests: Add another FUTEX2_NUMA selftest") Signed-off-by: Terry Tritton <terry.tritton(a)linaro.org> --- Changes in v2: - Add Fixes tag tools/testing/selftests/futex/functional/.gitignore | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/futex/functional/.gitignore b/tools/testing/selftests/futex/functional/.gitignore index 7b24ae89594a..776ad658f75e 100644 --- a/tools/testing/selftests/futex/functional/.gitignore +++ b/tools/testing/selftests/futex/functional/.gitignore @@ -11,3 +11,4 @@ futex_wait_timeout futex_wait_uninitialized_heap futex_wait_wouldblock futex_waitv +futex_numa -- 2.39.5

3 months, 1 week

2
1
0 0

[PATCH v2] selftests/mm: pagemap_scan ioctl: add PFN ZERO test cases

by Muhammad Usama Anjum

Add test cases to test the correctness of PFN ZERO flag of pagemap_scan ioctl. Test with normal pages backed memory and huge pages backed memory. Cc: David Hildenbrand <david(a)redhat.com> Signed-off-by: Muhammad Usama Anjum <usama.anjum(a)collabora.com> --- The bug has been fixed [1]. [1] https://lore.kernel.org/all/20250617143532.2375383-1-david@redhat.com Changes since v1: - Skip if madvise() fails - Skip test if use_zero_page isn't set to 1 - Keep on using memalign()+free() to allocate huge pages --- tools/testing/selftests/mm/pagemap_ioctl.c | 86 +++++++++++++++++++++- 1 file changed, 85 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c index 57b4bba2b45f3..976ab357f4651 100644 --- a/tools/testing/selftests/mm/pagemap_ioctl.c +++ b/tools/testing/selftests/mm/pagemap_ioctl.c @@ -1,4 +1,5 @@ // SPDX-License-Identifier: GPL-2.0 + #define _GNU_SOURCE #include <stdio.h> #include <fcntl.h> @@ -1480,6 +1481,86 @@ static void transact_test(int page_size) extra_thread_faults); } +bool is_use_zero_page_set(void) +{ + ssize_t bytes_read; + char buffer[2]; + int fd; + + fd = open("/sys/kernel/mm/transparent_hugepage/use_zero_page", O_RDONLY); + if (fd < 0) + return 0; + + bytes_read = read(fd, buffer, sizeof(buffer) - 1); + if (bytes_read <= 0) { + close(fd); + return 0; + } + + close(fd); + if (atoi(buffer) != 1) + return 0; + + return 1; +} + +void zeropfn_tests(void) +{ + unsigned long long mem_size; + struct page_region vec; + int i, ret; + char *mem; + + /* Test with normal memory */ + mem_size = 10 * page_size; + mem = mmap(NULL, mem_size, PROT_READ, MAP_PRIVATE | MAP_ANON, -1, 0); + if (mem == MAP_FAILED) + ksft_exit_fail_msg("error nomem\n"); + + /* Touch each page to ensure it's mapped */ + for (i = 0; i < mem_size; i += page_size) + (void)((volatile char *)mem)[i]; + + ret = pagemap_ioctl(mem, mem_size, &vec, 1, 0, + (mem_size / page_size), PAGE_IS_PFNZERO, 0, 0, PAGE_IS_PFNZERO); + if (ret < 0) + ksft_exit_fail_msg("error %d %d %s\n", ret, errno, strerror(errno)); + + ksft_test_result(ret == 1 && LEN(vec) == (mem_size / page_size), + "%s all pages must have PFNZERO set\n", __func__); + + munmap(mem, mem_size); + + /* Test with huge page if user_zero_page is set to 1 */ + if (!is_use_zero_page_set()) { + ksft_test_result_skip("%s use_zero_page not supported or set to 1\n", __func__); + return; + } + + mem_size = 10 * hpage_size; + mem = memalign(hpage_size, mem_size); + if (!mem) + ksft_exit_fail_msg("error nomem\n"); + + ret = madvise(mem, mem_size, MADV_HUGEPAGE); + if (!ret) { + for (i = 0; i < mem_size; i += hpage_size) + (void)((volatile char *)mem)[i]; + + ret = pagemap_ioctl(mem, mem_size, &vec, 1, 0, + (mem_size / page_size), PAGE_IS_PFNZERO, 0, 0, PAGE_IS_PFNZERO); + if (ret < 0) + ksft_exit_fail_msg("error %d %d %s\n", ret, errno, strerror(errno)); + + ksft_test_result(ret == 1 && LEN(vec) == (mem_size / page_size), + "%s all huge pages must have PFNZERO set\n", __func__); + + free(mem); + } else { + ksft_test_result_skip("%s huge page not supported\n", __func__); + } +} + int main(int __attribute__((unused)) argc, char *argv[]) { int shmid, buf_size, fd, i, ret; @@ -1494,7 +1575,7 @@ int main(int __attribute__((unused)) argc, char *argv[]) if (init_uffd()) ksft_exit_pass(); - ksft_set_plan(115); + ksft_set_plan(117); page_size = getpagesize(); hpage_size = read_pmd_pagesize(); @@ -1669,6 +1750,9 @@ int main(int __attribute__((unused)) argc, char *argv[]) /* 16. Userfaultfd tests */ userfaultfd_tests(); + /* 17. ZEROPFN tests */ + zeropfn_tests(); + close(pagemap_fd); ksft_exit_pass(); } -- 2.43.0

3 months, 1 week

2
1
0 0

[PATCH v3 0/4] kselftest/arm64: Add coverage for the interaction of vfork() and GCS

by Mark Brown

I had cause to look at the vfork() support for GCS and realised that we don't have any direct test coverage, this series does so by adding vfork() to nolibc and then using that in basic-gcs to provide some simple vfork() coverage. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v3: - Stylistic nits in the GCS vfork() test. - SPARC has a non-standard vfork() ABI which needs handling. - Link to v2: https://lore.kernel.org/r/20250610-arm64-gcs-vfork-exit-v2-0-929443dfcf82@k… Changes in v2: - Add replacement of ifdef with if defined() in nolibc since the code doesn't reflect the coding style. - Remove check for arch specific vfork(). - Link to v1: https://lore.kernel.org/r/20250609-arm64-gcs-vfork-exit-v1-0-baad0f085747@k… --- Mark Brown (4): tools/nolibc: Replace ifdef with if defined() in sys.h tools/nolibc: Provide vfork() kselftest/arm64: Add a test for vfork() with GCS selftests/nolibc: Add coverage of vfork() tools/include/nolibc/arch-sparc.h | 16 +++++++ tools/include/nolibc/sys.h | 59 ++++++++++++++++++------- tools/testing/selftests/arm64/gcs/basic-gcs.c | 63 +++++++++++++++++++++++++++ tools/testing/selftests/nolibc/nolibc-test.c | 23 ++++++++-- 4 files changed, 142 insertions(+), 19 deletions(-) --- base-commit: 86731a2a651e58953fc949573895f2fa6d456841 change-id: 20250528-arm64-gcs-vfork-exit-4a7daf7652ee Best regards, -- Mark Brown <broonie(a)kernel.org>

3 months, 1 week

2
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0 0

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