Linux-kselftest-mirror October 2022

linux-kselftest-mirror@lists.linaro.org

116 participants
208 discussions

[PATCH v6 1/2] x86/fpu: Allow PKRU to be (once again) written by ptrace.

by Kyle Huey

From: Kyle Huey <me(a)kylehuey.com> When management of the PKRU register was moved away from XSTATE, emulation of PKRU's existence in XSTATE was added for reading PKRU through ptrace, but not for writing PKRU through ptrace. This can be seen by running gdb and executing `p $pkru`, `set $pkru = 42`, and `p $pkru`. On affected kernels (5.14+) the write to the PKRU register (which gdb performs through ptrace) is ignored. There are three APIs that write PKRU: sigreturn, PTRACE_SETREGSET with NT_X86_XSTATE, and KVM_SET_XSAVE. sigreturn still uses XRSTOR to write to PKRU. KVM_SET_XSAVE has its own special handling to make PKRU writes take effect (in fpu_copy_uabi_to_guest_fpstate). Push that down into copy_uabi_to_xstate and have PTRACE_SETREGSET with NT_X86_XSTATE pass in a pointer to the appropriate PKRU slot. copy_sigframe_from_user_to_xstate depends on copy_uabi_to_xstate populating the PKRU field in the task's XSTATE so that __fpu_restore_sig can do a XRSTOR from it, so continue doing that. This also adds code to initialize the PKRU value to the hardware init value (namely 0) if the PKRU bit is not set in the XSTATE header provided to ptrace, to match XRSTOR. Fixes: e84ba47e313d ("x86/fpu: Hook up PKRU into ptrace()") Signed-off-by: Kyle Huey <me(a)kylehuey.com> Cc: Dave Hansen <dave.hansen(a)linux.intel.com> Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Borislav Petkov <bp(a)suse.de> Cc: stable(a)vger.kernel.org # 5.14+ --- arch/x86/kernel/fpu/core.c | 20 +++++++++----------- arch/x86/kernel/fpu/regset.c | 2 +- arch/x86/kernel/fpu/signal.c | 2 +- arch/x86/kernel/fpu/xstate.c | 25 ++++++++++++++++++++----- arch/x86/kernel/fpu/xstate.h | 4 ++-- 5 files changed, 33 insertions(+), 20 deletions(-) diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index 3b28c5b25e12..c273669e8a00 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -391,8 +391,6 @@ int fpu_copy_uabi_to_guest_fpstate(struct fpu_guest *gfpu, const void *buf, { struct fpstate *kstate = gfpu->fpstate; const union fpregs_state *ustate = buf; - struct pkru_state *xpkru; - int ret; if (!cpu_feature_enabled(X86_FEATURE_XSAVE)) { if (ustate->xsave.header.xfeatures & ~XFEATURE_MASK_FPSSE) @@ -406,16 +404,16 @@ int fpu_copy_uabi_to_guest_fpstate(struct fpu_guest *gfpu, const void *buf, if (ustate->xsave.header.xfeatures & ~xcr0) return -EINVAL; - ret = copy_uabi_from_kernel_to_xstate(kstate, ustate); - if (ret) - return ret; + /* + * Nullify @vpkru to preserve its current value if PKRU's bit isn't set + * in the header. KVM's odd ABI is to leave PKRU untouched in this + * case (all other components are eventually re-initialized). + * (Not clear that this is actually necessary for compat). + */ + if (!(ustate->xsave.header.xfeatures & XFEATURE_MASK_PKRU)) + vpkru = NULL; - /* Retrieve PKRU if not in init state */ - if (kstate->regs.xsave.header.xfeatures & XFEATURE_MASK_PKRU) { - xpkru = get_xsave_addr(&kstate->regs.xsave, XFEATURE_PKRU); - *vpkru = xpkru->pkru; - } - return 0; + return copy_uabi_from_kernel_to_xstate(kstate, ustate, vpkru); } EXPORT_SYMBOL_GPL(fpu_copy_uabi_to_guest_fpstate); #endif /* CONFIG_KVM */ diff --git a/arch/x86/kernel/fpu/regset.c b/arch/x86/kernel/fpu/regset.c index 75ffaef8c299..6d056b68f4ed 100644 --- a/arch/x86/kernel/fpu/regset.c +++ b/arch/x86/kernel/fpu/regset.c @@ -167,7 +167,7 @@ int xstateregs_set(struct task_struct *target, const struct user_regset *regset, } fpu_force_restore(fpu); - ret = copy_uabi_from_kernel_to_xstate(fpu->fpstate, kbuf ?: tmpbuf); + ret = copy_uabi_from_kernel_to_xstate(fpu->fpstate, kbuf ?: tmpbuf, &target->thread.pkru); out: vfree(tmpbuf); diff --git a/arch/x86/kernel/fpu/signal.c b/arch/x86/kernel/fpu/signal.c index 91d4b6de58ab..558076dbde5b 100644 --- a/arch/x86/kernel/fpu/signal.c +++ b/arch/x86/kernel/fpu/signal.c @@ -396,7 +396,7 @@ static bool __fpu_restore_sig(void __user *buf, void __user *buf_fx, fpregs = &fpu->fpstate->regs; if (use_xsave() && !fx_only) { - if (copy_sigframe_from_user_to_xstate(fpu->fpstate, buf_fx)) + if (copy_sigframe_from_user_to_xstate(tsk, buf_fx)) return false; } else { if (__copy_from_user(&fpregs->fxsave, buf_fx, diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index c8340156bfd2..8f14981a3936 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -1197,7 +1197,7 @@ static int copy_from_buffer(void *dst, unsigned int offset, unsigned int size, static int copy_uabi_to_xstate(struct fpstate *fpstate, const void *kbuf, - const void __user *ubuf) + const void __user *ubuf, u32 *pkru) { struct xregs_state *xsave = &fpstate->regs.xsave; unsigned int offset, size; @@ -1246,6 +1246,21 @@ static int copy_uabi_to_xstate(struct fpstate *fpstate, const void *kbuf, } } + /* + * Update the user protection key storage. Allow KVM to + * pass in a NULL pkru pointer if the mask bit is unset + * for its legacy ABI behavior. + */ + if (pkru) + *pkru = 0; + + if (hdr.xfeatures & XFEATURE_MASK_PKRU) { + struct pkru_state *xpkru; + + xpkru = __raw_xsave_addr(xsave, XFEATURE_PKRU); + *pkru = xpkru->pkru; + } + /* * The state that came in from userspace was user-state only. * Mask all the user states out of 'xfeatures': @@ -1264,9 +1279,9 @@ static int copy_uabi_to_xstate(struct fpstate *fpstate, const void *kbuf, * Convert from a ptrace standard-format kernel buffer to kernel XSAVE[S] * format and copy to the target thread. Used by ptrace and KVM. */ -int copy_uabi_from_kernel_to_xstate(struct fpstate *fpstate, const void *kbuf) +int copy_uabi_from_kernel_to_xstate(struct fpstate *fpstate, const void *kbuf, u32 *pkru) { - return copy_uabi_to_xstate(fpstate, kbuf, NULL); + return copy_uabi_to_xstate(fpstate, kbuf, NULL, pkru); } /* @@ -1274,10 +1289,10 @@ int copy_uabi_from_kernel_to_xstate(struct fpstate *fpstate, const void *kbuf) * XSAVE[S] format and copy to the target thread. This is called from the * sigreturn() and rt_sigreturn() system calls. */ -int copy_sigframe_from_user_to_xstate(struct fpstate *fpstate, +int copy_sigframe_from_user_to_xstate(struct task_struct *tsk, const void __user *ubuf) { - return copy_uabi_to_xstate(fpstate, NULL, ubuf); + return copy_uabi_to_xstate(tsk->thread.fpu.fpstate, NULL, ubuf, &tsk->thread.pkru); } static bool validate_independent_components(u64 mask) diff --git a/arch/x86/kernel/fpu/xstate.h b/arch/x86/kernel/fpu/xstate.h index 5ad47031383b..a4ecb04d8d64 100644 --- a/arch/x86/kernel/fpu/xstate.h +++ b/arch/x86/kernel/fpu/xstate.h @@ -46,8 +46,8 @@ extern void __copy_xstate_to_uabi_buf(struct membuf to, struct fpstate *fpstate, u32 pkru_val, enum xstate_copy_mode copy_mode); extern void copy_xstate_to_uabi_buf(struct membuf to, struct task_struct *tsk, enum xstate_copy_mode mode); -extern int copy_uabi_from_kernel_to_xstate(struct fpstate *fpstate, const void *kbuf); -extern int copy_sigframe_from_user_to_xstate(struct fpstate *fpstate, const void __user *ubuf); +extern int copy_uabi_from_kernel_to_xstate(struct fpstate *fpstate, const void *kbuf, u32 *pkru); +extern int copy_sigframe_from_user_to_xstate(struct task_struct *tsk, const void __user *ubuf); extern void fpu__init_cpu_xstate(void); -- 2.37.2 Changelog since v5: - Avoids a second copy from the uabi buffer as suggested. - Preserves old KVM_SET_XSAVE behavior where leaving the PKRU bit in the XSTATE header results in PKRU remaining unchanged instead of reinitializing it. - Fixed up patch metadata as requested. Changelog since v4: - Selftest additionally checks PKRU readbacks through ptrace. - Selftest flips all PKRU bits (except the default key). Changelog since v3: - The v3 patch is now part 1 of 2. - Adds a selftest in part 2 of 2. Changelog since v2: - Removed now unused variables in fpu_copy_uabi_to_guest_fpstate Changelog since v1: - Handles the error case of copy_to_buffer().

2 years

[RFC PATCH v2 0/2] kunit: Support redirecting function calls

by David Gow

When writing tests, it'd often be very useful to be able to intercept calls to a function in the code being tested and replace it with a test-specific stub. This has always been an obviously missing piece of KUnit, and the solutions always involve some tradeoffs with cleanliness, performance, or impact on non-test code. See the folowing document for some of the challenges: https://kunit.dev/mocking.html This series consists of two prototype patches which add support for this sort of redirection to KUnit tests: 1: static_stub: Any function which might want to be intercepted adds a call to a macro which checks if a test has redirected calls to it, and calls the corresponding replacement. 2: ftrace_stub: Functions are intercepted using ftrace. This doesn't require adding a new prologue to each function being replaced, but does have more dependencies (which restricts it to a small number of architectures, not including UML), and doesn't work well with inline functions. The API for both implementations is very similar, so it should be easy to migrate from one to the other if necessary. Both of these implementations restrict the redirection to the test context: it is automatically undone after the KUnit test completes, and does not affect calls in other threads. If CONFIG_KUNIT is not enabled, there should be no overhead in either implementation. Does either (or both) of these features sound useful, and is this sort-of API the right model? (Personally, I think there's a reasonable scope for both.) Is anything obviously missing or wrong? Do the names, descriptions etc. make any sense? Note that these patches are definitely still at the "prototype" level, and things like error-handling, documentation, and testing are still pretty sparse. There is also quite a bit of room for optimisation. These'll all be improved for v1 if the concept seems good. We're going to be talking about this again at LPC, so it's worth having another look before then if you're interested and/or will be attending: https://lpc.events/event/16/contributions/1308/ Cheers, -- David --- Changes since RFC v1: https://lore.kernel.org/lkml/20220318021314.3225240-1-davidgow@google.com/ - Fix some typos (thanks Daniel) - Use typecheck_fn() to fix typechecking in some cases (thanks Brendan) - Use ftrace_instruction_pointer_set() in place of kernel livepatch, which seems to have disappeared: https://lore.kernel.org/lkml/0a76550d-008d-0364-8244-4dae2981ea05@csgroup.e… - Fix a copy-paste name error in the resource finding function. - Rebase on top of torvalds/master, as it wasn't applying cleanly. Note that the Kernel Livepatch -> ftrace change seems to allow more architectures to work, but while they compile, there still seems to be issues. So, this will compile on (e.g.) arm64, but fails: $ ./tools/testing/kunit/kunit.py run 'example*' --kunitconfig lib/kunit/stubs_example.kunitconfig --arch arm64 --make_options LLVM=1 [05:00:13] # example_ftrace_stub_test: initializing [05:00:13] # example_ftrace_stub_test: EXPECTATION FAILED at lib/kunit/kunit-example-test.c:179 [05:00:13] Expected add_one(1) == 0, but [05:00:13] add_one(1) == 2 [05:00:13] not ok 6 - example_ftrace_stub_test [05:00:13] [FAILED] example_ftrace_stub_test Daniel Latypov (1): kunit: expose ftrace-based API for stubbing out functions during tests David Gow (1): kunit: Expose 'static stub' API to redirect functions include/kunit/ftrace_stub.h | 84 +++++++++++++++++ include/kunit/static_stub.h | 106 +++++++++++++++++++++ lib/kunit/Kconfig | 11 +++ lib/kunit/Makefile | 5 + lib/kunit/ftrace_stub.c | 137 ++++++++++++++++++++++++++++ lib/kunit/kunit-example-test.c | 63 +++++++++++++ lib/kunit/static_stub.c | 125 +++++++++++++++++++++++++ lib/kunit/stubs_example.kunitconfig | 10 ++ 8 files changed, 541 insertions(+) create mode 100644 include/kunit/ftrace_stub.h create mode 100644 include/kunit/static_stub.h create mode 100644 lib/kunit/ftrace_stub.c create mode 100644 lib/kunit/static_stub.c create mode 100644 lib/kunit/stubs_example.kunitconfig -- 2.37.2.789.g6183377224-goog

2 years

[PATCH iproute2-next 1/2] bridge: link: enable MacAuth/MAB feature

by Hans Schultz

The MAB feature can be enabled on a locked port with the command: bridge link set dev <DEV> mab on Signed-off-by: Hans Schultz <netdev(a)kapio-technology.com> --- bridge/fdb.c | 17 +++++++++++++++-- bridge/link.c | 21 ++++++++++++++++++--- include/uapi/linux/if_link.h | 1 + include/uapi/linux/neighbour.h | 7 ++++++- ip/iplink_bridge_slave.c | 16 +++++++++++++--- man/man8/bridge.8 | 10 ++++++++++ man/man8/ip-link.8.in | 8 ++++++++ 7 files changed, 71 insertions(+), 9 deletions(-) diff --git a/bridge/fdb.c b/bridge/fdb.c index 5f71bde0..0fbe9bd3 100644 --- a/bridge/fdb.c +++ b/bridge/fdb.c @@ -93,7 +93,7 @@ static int state_a2n(unsigned int *s, const char *arg) return 0; } -static void fdb_print_flags(FILE *fp, unsigned int flags) +static void fdb_print_flags(FILE *fp, unsigned int flags, __u8 ext_flags) { open_json_array(PRINT_JSON, is_json_context() ? "flags" : ""); @@ -116,6 +116,9 @@ static void fdb_print_flags(FILE *fp, unsigned int flags) if (flags & NTF_STICKY) print_string(PRINT_ANY, NULL, "%s ", "sticky"); + if (ext_flags & NTF_EXT_LOCKED) + print_string(PRINT_ANY, NULL, "%s ", "locked"); + close_json_array(PRINT_JSON, NULL); } @@ -144,6 +147,7 @@ int print_fdb(struct nlmsghdr *n, void *arg) struct ndmsg *r = NLMSG_DATA(n); int len = n->nlmsg_len; struct rtattr *tb[NDA_MAX+1]; + __u32 ext_flags = 0; __u16 vid = 0; if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH) { @@ -170,6 +174,9 @@ int print_fdb(struct nlmsghdr *n, void *arg) parse_rtattr(tb, NDA_MAX, NDA_RTA(r), n->nlmsg_len - NLMSG_LENGTH(sizeof(*r))); + if (tb[NDA_FLAGS_EXT]) + ext_flags = rta_getattr_u32(tb[NDA_FLAGS_EXT]); + if (tb[NDA_VLAN]) vid = rta_getattr_u16(tb[NDA_VLAN]); @@ -266,7 +273,7 @@ int print_fdb(struct nlmsghdr *n, void *arg) if (show_stats && tb[NDA_CACHEINFO]) fdb_print_stats(fp, RTA_DATA(tb[NDA_CACHEINFO])); - fdb_print_flags(fp, r->ndm_flags); + fdb_print_flags(fp, r->ndm_flags, ext_flags); if (tb[NDA_MASTER]) @@ -414,6 +421,7 @@ static int fdb_modify(int cmd, int flags, int argc, char **argv) char *endptr; short vid = -1; __u32 nhid = 0; + __u32 ext_flags = 0; while (argc > 0) { if (strcmp(*argv, "dev") == 0) { @@ -527,6 +535,11 @@ static int fdb_modify(int cmd, int flags, int argc, char **argv) if (dst_ok) addattr_l(&req.n, sizeof(req), NDA_DST, &dst.data, dst.bytelen); + if (ext_flags && + addattr_l(&req.n, sizeof(req), NDA_FLAGS_EXT, &ext_flags, + sizeof(ext_flags)) < 0) + return -1; + if (vid >= 0) addattr16(&req.n, sizeof(req), NDA_VLAN, vid); if (nhid > 0) diff --git a/bridge/link.c b/bridge/link.c index 3810fa04..dd69d7c3 100644 --- a/bridge/link.c +++ b/bridge/link.c @@ -181,9 +181,14 @@ static void print_protinfo(FILE *fp, struct rtattr *attr) if (prtb[IFLA_BRPORT_ISOLATED]) print_on_off(PRINT_ANY, "isolated", "isolated %s ", rta_getattr_u8(prtb[IFLA_BRPORT_ISOLATED])); - if (prtb[IFLA_BRPORT_LOCKED]) - print_on_off(PRINT_ANY, "locked", "locked %s ", - rta_getattr_u8(prtb[IFLA_BRPORT_LOCKED])); + if (prtb[IFLA_BRPORT_LOCKED]) { + if (prtb[IFLA_BRPORT_MAB] && rta_getattr_u8(prtb[IFLA_BRPORT_MAB])) + print_on_off(PRINT_ANY, "locked mab", "locked mab %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_LOCKED])); + else + print_on_off(PRINT_ANY, "locked", "locked %s ", + rta_getattr_u8(prtb[IFLA_BRPORT_LOCKED])); + } } else print_stp_state(rta_getattr_u8(attr)); } @@ -281,6 +286,7 @@ static void usage(void) " [ vlan_tunnel {on | off} ]\n" " [ isolated {on | off} ]\n" " [ locked {on | off} ]\n" + " [ mab {on | off} ]\n" " [ hwmode {vepa | veb} ]\n" " [ backup_port DEVICE ] [ nobackup_port ]\n" " [ self ] [ master ]\n" @@ -312,6 +318,7 @@ static int brlink_modify(int argc, char **argv) __s8 bcast_flood = -1; __s8 mcast_to_unicast = -1; __s8 locked = -1; + __s8 macauth = -1; __s8 isolated = -1; __s8 hairpin = -1; __s8 bpdu_guard = -1; @@ -437,6 +444,11 @@ static int brlink_modify(int argc, char **argv) locked = parse_on_off("locked", *argv, &ret); if (ret) return ret; + } else if (strcmp(*argv, "mab") == 0) { + NEXT_ARG(); + macauth = parse_on_off("mab", *argv, &ret); + if (ret) + return ret; } else if (strcmp(*argv, "backup_port") == 0) { NEXT_ARG(); backup_port_idx = ll_name_to_index(*argv); @@ -520,6 +532,9 @@ static int brlink_modify(int argc, char **argv) if (locked >= 0) addattr8(&req.n, sizeof(req), IFLA_BRPORT_LOCKED, locked); + if (macauth >= 0) + addattr8(&req.n, sizeof(req), IFLA_BRPORT_MAB, macauth); + if (backup_port_idx != -1) addattr32(&req.n, sizeof(req), IFLA_BRPORT_BACKUP_PORT, backup_port_idx); diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index 7494cffb..58a002de 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -559,6 +559,7 @@ enum { IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT, IFLA_BRPORT_MCAST_EHT_HOSTS_CNT, IFLA_BRPORT_LOCKED, + IFLA_BRPORT_MAB, __IFLA_BRPORT_MAX }; #define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1) diff --git a/include/uapi/linux/neighbour.h b/include/uapi/linux/neighbour.h index a998bf76..4dda051b 100644 --- a/include/uapi/linux/neighbour.h +++ b/include/uapi/linux/neighbour.h @@ -52,7 +52,8 @@ enum { #define NTF_STICKY (1 << 6) #define NTF_ROUTER (1 << 7) /* Extended flags under NDA_FLAGS_EXT: */ -#define NTF_EXT_MANAGED (1 << 0) +#define NTF_EXT_MANAGED (1 << 0) +#define NTF_EXT_LOCKED (1 << 1) /* * Neighbor Cache Entry States. @@ -86,6 +87,10 @@ enum { * NTF_EXT_MANAGED flagged neigbor entries are managed by the kernel on behalf * of a user space control plane, and automatically refreshed so that (if * possible) they remain in NUD_REACHABLE state. + * + * NTF_EXT_LOCKED flagged FDB entries are placeholder entries used with the + * locked port feature, that ensures that an entry exists while at the same + * time dropping packets on ingress with src MAC and VID matching the entry. */ struct nda_cacheinfo { diff --git a/ip/iplink_bridge_slave.c b/ip/iplink_bridge_slave.c index 98d17213..0c0894eb 100644 --- a/ip/iplink_bridge_slave.c +++ b/ip/iplink_bridge_slave.c @@ -44,6 +44,7 @@ static void print_explain(FILE *f) " [ vlan_tunnel {on | off} ]\n" " [ isolated {on | off} ]\n" " [ locked {on | off} ]\n" + " [ mab {on | off} ]\n" " [ backup_port DEVICE ] [ nobackup_port ]\n" ); } @@ -284,9 +285,14 @@ static void bridge_slave_print_opt(struct link_util *lu, FILE *f, print_on_off(PRINT_ANY, "isolated", "isolated %s ", rta_getattr_u8(tb[IFLA_BRPORT_ISOLATED])); - if (tb[IFLA_BRPORT_LOCKED]) - print_on_off(PRINT_ANY, "locked", "locked %s ", - rta_getattr_u8(tb[IFLA_BRPORT_LOCKED])); + if (tb[IFLA_BRPORT_LOCKED]) { + if (tb[IFLA_BRPORT_MAB] && rta_getattr_u8(tb[IFLA_BRPORT_MAB])) + print_on_off(PRINT_ANY, "locked mab", "locked mab %s ", + rta_getattr_u8(tb[IFLA_BRPORT_LOCKED])); + else + print_on_off(PRINT_ANY, "locked", "locked %s ", + rta_getattr_u8(tb[IFLA_BRPORT_LOCKED])); + } if (tb[IFLA_BRPORT_BACKUP_PORT]) { int backup_p = rta_getattr_u32(tb[IFLA_BRPORT_BACKUP_PORT]); @@ -411,6 +417,10 @@ static int bridge_slave_parse_opt(struct link_util *lu, int argc, char **argv, NEXT_ARG(); bridge_slave_parse_on_off("locked", *argv, n, IFLA_BRPORT_LOCKED); + } else if (matches(*argv, "mab") == 0) { + NEXT_ARG(); + bridge_slave_parse_on_off("mab", *argv, n, + IFLA_BRPORT_MAB); } else if (matches(*argv, "backup_port") == 0) { int ifindex; diff --git a/man/man8/bridge.8 b/man/man8/bridge.8 index d4df772e..40250477 100644 --- a/man/man8/bridge.8 +++ b/man/man8/bridge.8 @@ -54,6 +54,7 @@ bridge \- show / manipulate bridge addresses and devices .BR vlan_tunnel " { " on " | " off " } ] [ " .BR isolated " { " on " | " off " } ] [ " .BR locked " { " on " | " off " } ] [ " +.BR mab " { " on " | " off " } ] [ " .B backup_port .IR DEVICE " ] [" .BR nobackup_port " ] [ " @@ -580,6 +581,15 @@ The common use is that hosts are allowed access through authentication with the IEEE 802.1X protocol or based on whitelists or like setups. By default this flag is off. +.TP +.RB "mab on " or " mab off " +Enables or disables the MAB/MacAuth feature. This feature can only be +activated on a port that is in locked mode, and when enabled it extends the +locked port feature so that MAC address can get access through a locked +port based on acceptlists, thus it is a much simpler procedure for a +device to become authorized than f.ex. the 802.1X protocol, and is used +for devices that are not capable of password or crypto based authorization +methods. .TP .BI backup_port " DEVICE" diff --git a/man/man8/ip-link.8.in b/man/man8/ip-link.8.in index fc9d62fc..187ca7ca 100644 --- a/man/man8/ip-link.8.in +++ b/man/man8/ip-link.8.in @@ -2454,6 +2454,9 @@ the following additional arguments are supported: .BR isolated " { " on " | " off " }" ] [ .BR locked " { " on " | " off " }" +] [ +.BR mab " { " on " | " off " }" +] [ .BR backup_port " DEVICE" ] [ .BR nobackup_port " ]" @@ -2560,6 +2563,11 @@ default this flag is off. behind the port cannot communicate through the port unless a FDB entry representing the host is in the FDB. By default this flag is off. +.BR mab " { " on " | " off " }" +- enables or disables the MAB/MacAuth feature on a locked port. It is +thus possible for a device to gain authorization on a locked port based +on acceptlists. + .BI backup_port " DEVICE" - if the port loses carrier all traffic will be redirected to the configured backup port -- 2.34.1

2 years

[PATCH] Documentation: kunit: Update description of --alltests option

by David Gow

kunit_tool's --alltests option was changed in commit 980ac3ad0512 ("kunit: tool: rename all_test_uml.config, use it for --alltests") to use a manually curated list of architecture-indpendent Kconfig options, rather than attempting to use make allyesconfig on UML, which was broken. Update the kunit_tool documentation to reflect the new behaviour of --alltests. Signed-off-by: David Gow <davidgow(a)google.com> --- Documentation/dev-tools/kunit/run_wrapper.rst | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/Documentation/dev-tools/kunit/run_wrapper.rst b/Documentation/dev-tools/kunit/run_wrapper.rst index 6b33caf6c8ab..dafe8eb28d30 100644 --- a/Documentation/dev-tools/kunit/run_wrapper.rst +++ b/Documentation/dev-tools/kunit/run_wrapper.rst @@ -251,14 +251,15 @@ command line arguments: compiling a kernel (using ``build`` or ``run`` commands). For example: to enable compiler warnings, we can pass ``--make_options W=1``. -- ``--alltests``: Builds a UML kernel with all config options enabled - using ``make allyesconfig``. This allows us to run as many tests as - possible. - - .. note:: It is slow and prone to breakage as new options are - added or modified. Instead, enable all tests - which have satisfied dependencies by adding - ``CONFIG_KUNIT_ALL_TESTS=y`` to your ``.kunitconfig``. +- ``--alltests``: Enable a predefined set of options in order to build + as many tests as possible. + + .. note:: The list of enabled options can be found in + ``tools/testing/kunit/configs/all_tests.config``. + + If you only want to enable all tests with otherwise satisfied + dependencies, instead add ``CONFIG_KUNIT_ALL_TESTS=y`` to your + ``.kunitconfig``. - ``--kunitconfig``: Specifies the path or the directory of the ``.kunitconfig`` file. For example: -- 2.38.0.rc1.362.ged0d419d3c-goog

2 years

[PATCH v10 0/2] SPDX: add copyleft-next-0.3.1

by Luis Chamberlain

As suggested by Thomas Gleixner, I'm following up to move on with the SPDX tag needed for copyleft-next-0.3.1. I've split this out from the test_sysfs selftest so to separate review from that. Changes on this v10: o embraced paragraph from Thomas Gleixner which helps explain why the OR operator in the SPDX license name o dropped the GPL-2.0 and GPL-2.0+ tags as suggested by Thomas Gleixner as these are outdated (still valid) in the SPDX spec o trimmed the Cc list to remove the test_sysfs / block layer / fs folks as the test_sysfs stuff is now dropped from consideration in this series The last series was at v9 but it also had the test_sysfs and its changes, its history can be found here: https://lore.kernel.org/all/20211029184500.2821444-1-mcgrof@kernel.org/ Luis Chamberlain (2): LICENSES: Add the copyleft-next-0.3.1 license testing: use the copyleft-next-0.3.1 SPDX tag LICENSES/dual/copyleft-next-0.3.1 | 236 +++++++++++++++++++++++ lib/test_kmod.c | 12 +- lib/test_sysctl.c | 12 +- tools/testing/selftests/kmod/kmod.sh | 13 +- tools/testing/selftests/sysctl/sysctl.sh | 12 +- 5 files changed, 240 insertions(+), 45 deletions(-) create mode 100644 LICENSES/dual/copyleft-next-0.3.1 -- 2.35.1

2 years

[PATCH] selftests/kvm: Avoid for loop initialization using vcpu->id in xapic_state_test

by Gautam Menghani

In the test_icr() function in xapic_state_test, one of the for loops is initialized with vcpu->id. Fix this assumption that vcpu->id is 0 so that IPIs are correctly sent to non-existent vCPUs [1]. Suggested-by: Sean Christopherson <seanjc(a)google.com> Signed-off-by: Gautam Menghani <gautammenghani201(a)gmail.com> --- [1] https://lore.kernel.org/kvm/YyoZr9rXSSMEtdh5@google.com/ tools/testing/selftests/kvm/x86_64/xapic_state_test.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c index 6f7a5ef66718..d7d37dae3eeb 100644 --- a/tools/testing/selftests/kvm/x86_64/xapic_state_test.c +++ b/tools/testing/selftests/kvm/x86_64/xapic_state_test.c @@ -114,7 +114,9 @@ static void test_icr(struct xapic_vcpu *x) * vCPUs, not vcpu.id + 1. Arbitrarily use vector 0xff. */ icr = APIC_INT_ASSERT | 0xff; - for (i = vcpu->id + 1; i < 0xff; i++) { + for (i = 0; i < 0xff; i++) { + if (i == vcpu->id) + continue; for (j = 0; j < 8; j++) __test_icr(x, i << (32 + 24) | icr | (j << 8)); } -- 2.34.1

2 years

[PATCH v2] Documentation: kunit: rewrite writing first test instructions

by Bagas Sanjaya

The wordings of step-by-step instructions on writing the first Kunit test are instructing readers to write codes without knowing what these are about. Rewrite these instructions to include the purpose of written code. While at it, align the code blocks of these contents. Signed-off-by: Bagas Sanjaya <bagasdotme(a)gmail.com> --- Changes since v1 [1]: - Fix jumped list numbering on writing the feature This patch is based on Khalid's full path to .kunitconfig patch [2]. [1]: https://lore.kernel.org/linux-doc/20220929125458.52979-1-bagasdotme@gmail.c… [2]: https://lore.kernel.org/linux-doc/20220929085332.4155-1-khalid.masum.92@gma… Documentation/dev-tools/kunit/start.rst | 40 ++++++++++++++----------- 1 file changed, 22 insertions(+), 18 deletions(-) diff --git a/Documentation/dev-tools/kunit/start.rst b/Documentation/dev-tools/kunit/start.rst index 7999874dc4ddb3..c0a5adf6d8d665 100644 --- a/Documentation/dev-tools/kunit/start.rst +++ b/Documentation/dev-tools/kunit/start.rst @@ -131,17 +131,19 @@ are built-in. Otherwise the module will need to be loaded. Writing Your First Test ======================= -In your kernel repository, let's add some code that we can test. +In your kernel repository, let's add some code that we can test. For this +purpose, we are going to add simple addition driver. -1. Create a file ``drivers/misc/example.h``, which includes: +1. Write the feature that will be tested. First, write the declaration + for ``misc_example_add()`` in ``drivers/misc/example.h``: -.. code-block:: c + .. code-block:: c int misc_example_add(int left, int right); -2. Create a file ``drivers/misc/example.c``, which includes: + Then implement the function in ``drivers/misc/example.c``: -.. code-block:: c + .. code-block:: c #include <linux/errno.h> @@ -152,24 +154,25 @@ In your kernel repository, let's add some code that we can test. return left + right; } -3. Add the following lines to ``drivers/misc/Kconfig``: +2. Add Kconfig menu entry for the feature to ``drivers/misc/Kconfig``: -.. code-block:: kconfig + .. code-block:: kconfig config MISC_EXAMPLE bool "My example" -4. Add the following lines to ``drivers/misc/Makefile``: +3. Add the kbuild goal that will build the feature to + ``drivers/misc/Makefile``: -.. code-block:: make + .. code-block:: make obj-$(CONFIG_MISC_EXAMPLE) += example.o Now we are ready to write the test cases. -1. Add the below test case in ``drivers/misc/example_test.c``: +1. Write the test in ``drivers/misc/example_test.c``: -.. code-block:: c + .. code-block:: c #include <kunit/test.h> #include "example.h" @@ -202,31 +205,32 @@ Now we are ready to write the test cases. }; kunit_test_suite(misc_example_test_suite); -2. Add the following lines to ``drivers/misc/Kconfig``: +2. Add following Kconfig entry for the test to ``drivers/misc/Kconfig``: -.. code-block:: kconfig + .. code-block:: kconfig config MISC_EXAMPLE_TEST tristate "Test for my example" if !KUNIT_ALL_TESTS depends on MISC_EXAMPLE && KUNIT=y default KUNIT_ALL_TESTS -3. Add the following lines to ``drivers/misc/Makefile``: +3. Add kbuild goal of the test to ``drivers/misc/Makefile``: -.. code-block:: make + .. code-block:: make obj-$(CONFIG_MISC_EXAMPLE_TEST) += example_test.o -4. Add following configuration fragments to ``.kunit/.kunitconfig``: +4. Add following configuration fragments for the test to + ``.kunit/.kunitconfig``: -.. code-block:: none + .. code-block:: none CONFIG_MISC_EXAMPLE=y CONFIG_MISC_EXAMPLE_TEST=y 5. Run the test: -.. code-block:: bash + .. code-block:: bash ./tools/testing/kunit/kunit.py run -- An old man doll... just what I always wanted! - Clara

2 years

[PATCH net-next,v2] selftests/tc-testing: update qdisc/cls/action features in config

by Zhengchao Shao

Since three patchsets "add tc-testing test cases", "refactor duplicate codes in the tc cls walk function", and "refactor duplicate codes in the qdisc class walk function" are merged to net-next tree, the list of supported features needs to be updated in config file. Signed-off-by: Zhengchao Shao <shaozhengchao(a)huawei.com> --- v2: modify typos --- tools/testing/selftests/tc-testing/config | 25 ++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/tc-testing/config b/tools/testing/selftests/tc-testing/config index 2b2c2a835757..4638c63a339f 100644 --- a/tools/testing/selftests/tc-testing/config +++ b/tools/testing/selftests/tc-testing/config @@ -13,15 +13,28 @@ CONFIG_NET_SCHED=y # Queueing/Scheduling # CONFIG_NET_SCH_ATM=m +CONFIG_NET_SCH_CAKE=m +CONFIG_NET_SCH_CBQ=m +CONFIG_NET_SCH_CBS=m CONFIG_NET_SCH_CHOKE=m CONFIG_NET_SCH_CODEL=m +CONFIG_NET_SCH_DRR=m +CONFIG_NET_SCH_DSMARK=m CONFIG_NET_SCH_ETF=m CONFIG_NET_SCH_FQ=m +CONFIG_NET_SCH_FQ_CODEL=m CONFIG_NET_SCH_GRED=m +CONFIG_NET_SCH_HFSC=m CONFIG_NET_SCH_HHF=m +CONFIG_NET_SCH_HTB=m +CONFIG_NET_SCH_INGRESS=m +CONFIG_NET_SCH_MQPRIO=m +CONFIG_NET_SCH_MULTIQ=m +CONFIG_NET_SCH_NETEM=m +CONFIG_NET_SCH_PIE=m CONFIG_NET_SCH_PLUG=m CONFIG_NET_SCH_PRIO=m -CONFIG_NET_SCH_INGRESS=m +CONFIG_NET_SCH_QFQ=m CONFIG_NET_SCH_SFB=m CONFIG_NET_SCH_SFQ=m CONFIG_NET_SCH_SKBPRIO=m @@ -37,6 +50,15 @@ CONFIG_NET_CLS_FW=m CONFIG_NET_CLS_U32=m CONFIG_CLS_U32_PERF=y CONFIG_CLS_U32_MARK=y +CONFIG_NET_CLS_BASIC=m +CONFIG_NET_CLS_BPF=m +CONFIG_NET_CLS_CGROUP=m +CONFIG_NET_CLS_FLOW=m +CONFIG_NET_CLS_FLOWER=m +CONFIG_NET_CLS_MATCHALL=m +CONFIG_NET_CLS_ROUTE4=m +CONFIG_NET_CLS_RSVP=m +CONFIG_NET_CLS_TCINDEX=m CONFIG_NET_EMATCH=y CONFIG_NET_EMATCH_STACK=32 CONFIG_NET_EMATCH_CMP=m @@ -68,6 +90,7 @@ CONFIG_NET_ACT_IFE=m CONFIG_NET_ACT_TUNNEL_KEY=m CONFIG_NET_ACT_CT=m CONFIG_NET_ACT_MPLS=m +CONFIG_NET_ACT_GATE=m CONFIG_NET_IFE_SKBMARK=m CONFIG_NET_IFE_SKBPRIO=m CONFIG_NET_IFE_SKBTCINDEX=m -- 2.17.1

2 years

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