user/sven/linux.git/include/uapi, branch v6.6.94

dmaengine: idxd: add wq driver name support for accel-config user tool

2025-06-04T12:42:17Z

[ Upstream commit 7af1e0aceeb321cbc90fcf6fa0bec8870290377f ] With the possibility of multiple wq drivers that can be bound to the wq, the user config tool accel-config needs a way to know which wq driver to bind to the wq. Introduce per wq driver_name sysfs attribute where the user can indicate the driver to be bound to the wq. This allows accel-config to just bind to the driver using wq->driver_name. Signed-off-by: Dave Jiang Signed-off-by: Tom Zanussi Reviewed-by: Fenghua Yu Acked-by: Vinod Koul Link: https://lore.kernel.org/r/20230908201045.4115614-1-fenghua.yu@intel.com Signed-off-by: Vinod Koul Stable-dep-of: 8dfa57aabff6 ("dmaengine: idxd: Fix allowing write() from different address spaces") Signed-off-by: Sasha Levin

bpf: Allow pre-ordering for bpf cgroup progs

2025-06-04T12:41:58Z

[ Upstream commit 4b82b181a26cff8bf7adc3a85a88d121d92edeaf ] Currently for bpf progs in a cgroup hierarchy, the effective prog array is computed from bottom cgroup to upper cgroups (post-ordering). For example, the following cgroup hierarchy root cgroup: p1, p2 subcgroup: p3, p4 have BPF_F_ALLOW_MULTI for both cgroup levels. The effective cgroup array ordering looks like p3 p4 p1 p2 and at run time, progs will execute based on that order. But in some cases, it is desirable to have root prog executes earlier than children progs (pre-ordering). For example, - prog p1 intends to collect original pkt dest addresses. - prog p3 will modify original pkt dest addresses to a proxy address for security reason. The end result is that prog p1 gets proxy address which is not what it wants. Putting p1 to every child cgroup is not desirable either as it will duplicate itself in many child cgroups. And this is exactly a use case we are encountering in Meta. To fix this issue, let us introduce a flag BPF_F_PREORDER. If the flag is specified at attachment time, the prog has higher priority and the ordering with that flag will be from top to bottom (pre-ordering). For example, in the above example, root cgroup: p1, p2 subcgroup: p3, p4 Let us say p2 and p4 are marked with BPF_F_PREORDER. The final effective array ordering will be p2 p4 p3 p1 Suggested-by: Andrii Nakryiko Acked-by: Andrii Nakryiko Signed-off-by: Yonghong Song Link: https://lore.kernel.org/r/20250224230116.283071-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov Signed-off-by: Sasha Levin

types: Complement the aligned types with signed 64-bit one

2025-05-18T06:24:09Z

[ Upstream commit e4ca0e59c39442546866f3dd514a3a5956577daf ] Some user may want to use aligned signed 64-bit type. Provide it for them. Signed-off-by: Andy Shevchenko Link: https://patch.msgid.link/20240903180218.3640501-2-andriy.shevchenko@linux.intel.com Signed-off-by: Jonathan Cameron Stable-dep-of: 1bb942287e05 ("iio: accel: adxl355: Make timestamp 64-bit aligned using aligned_s64") Signed-off-by: Sasha Levin

landlock: Add the errata interface

2025-04-25T08:45:57Z

commit 15383a0d63dbcd63dc7e8d9ec1bf3a0f7ebf64ac upstream. Some fixes may require user space to check if they are applied on the running kernel before using a specific feature. For instance, this applies when a restriction was previously too restrictive and is now getting relaxed (e.g. for compatibility reasons). However, non-visible changes for legitimate use (e.g. security fixes) do not require an erratum. Because fixes are backported down to a specific Landlock ABI, we need a way to avoid cherry-pick conflicts. The solution is to only update a file related to the lower ABI impacted by this issue. All the ABI files are then used to create a bitmask of fixes. The new errata interface is similar to the one used to get the supported Landlock ABI version, but it returns a bitmask instead because the order of fixes may not match the order of versions, and not all fixes may apply to all versions. The actual errata will come with dedicated commits. The description is not actually used in the code but serves as documentation. Create the landlock_abi_version symbol and use its value to check errata consistency. Update test_base's create_ruleset_checks_ordering tests and add errata tests. This commit is backportable down to the first version of Landlock. Fixes: 3532b0b4352c ("landlock: Enable user space to infer supported features") Cc: Günther Noack Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20250318161443.279194-3-mic@digikod.net Signed-off-by: Mickaël Salaün Signed-off-by: Greg Kroah-Hartman

drm/amdkfd: clamp queue size to minimum

2025-04-25T08:45:18Z

[ Upstream commit e90711946b53590371ecce32e8fcc381a99d6333 ] If queue size is less than minimum, clamp it to minimum to prevent underflow when writing queue mqd. Signed-off-by: David Yat Sin Reviewed-by: Jay Cornwall Reviewed-by: Harish Kasiviswanathan Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

IB/core: Add support for XDR link speed

2025-03-07T15:45:37Z

[ Upstream commit 703289ce43f740b0096724300107df82d008552f ] Add new IBTA speed XDR, the new rate that was added to Infiniband spec as part of XDR and supporting signaling rate of 200Gb. In order to report that value to rdma-core, add new u32 field to query_port response. Signed-off-by: Or Har-Toov Reviewed-by: Mark Zhang Link: https://lore.kernel.org/r/9d235fc600a999e8274010f0e18b40fa60540e6c.1695204156.git.leon@kernel.org Reviewed-by: Jacob Keller Signed-off-by: Leon Romanovsky Stable-dep-of: c534ffda781f ("RDMA/mlx5: Fix AH static rate parsing") Signed-off-by: Sasha Levin

Input: allocate keycode for phone linking

2025-02-17T08:40:10Z

[ Upstream commit 1bebc7869c99d466f819dd2cffaef0edf7d7a035 ] The F11 key on the new Lenovo Thinkpad T14 Gen 5, T16 Gen 3, and P14s Gen 5 laptops includes a symbol showing a smartphone and a laptop chained together. According to the user manual, it starts the Microsoft Phone Link software used to connect to Android/iOS devices and relay messages/calls or sync data. As there are no suitable keycodes for this action, introduce a new one. Signed-off-by: Illia Ostapyshyn Acked-by: Dmitry Torokhov Link: https://lore.kernel.org/r/20241114173930.44983-2-illia@yshyn.com Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin

stddef: make __struct_group() UAPI C++-friendly

2025-01-02T09:32:03Z

[ Upstream commit 724c6ce38bbaeb4b3f109b0e066d6c0ecd15446c ] For the most part of the C++ history, it couldn't have type declarations inside anonymous unions for different reasons. At the same time, __struct_group() relies on the latters, so when the @TAG argument is not empty, C++ code doesn't want to build (even under `extern "C"`): ../linux/include/uapi/linux/pkt_cls.h:25:24: error: 'struct tc_u32_sel::::tc_u32_sel_hdr,' invalid; an anonymous union may only have public non-static data members [-fpermissive] The safest way to fix this without trying to switch standards (which is impossible in UAPI anyway) etc., is to disable tag declaration for that language. This won't break anything since for now it's not buildable at all. Use a separate definition for __struct_group() when __cplusplus is defined to mitigate the error, including the version from tools/. Fixes: 50d7bd38c3aa ("stddef: Introduce struct_group() helper macro") Reported-by: Christopher Ferris Closes: https://lore.kernel.org/linux-hardening/Z1HZpe3WE5As8UAz@google.com Suggested-by: Kees Cook # __struct_group_tag() Signed-off-by: Alexander Lobakin Reviewed-by: Gustavo A. R. Silva Link: https://lore.kernel.org/r/20241219135734.2130002-1-aleksander.lobakin@intel.com Signed-off-by: Kees Cook Signed-off-by: Sasha Levin

sched/headers: Move 'struct sched_param' out of uapi, to work around glibc/musl breakage

2024-12-14T19:00:19Z

[ Upstream commit d844fe65f0957024c3e1b0bf2a0615246184d9bc ] Both glibc and musl define 'struct sched_param' in sched.h, while kernel has it in uapi/linux/sched/types.h, making it cumbersome to use sched_getattr(2) or sched_setattr(2) from userspace. For example, something like this: #include #include struct sched_attr sa; will result in "error: redefinition of ‘struct sched_param’" (note the code doesn't need sched_param at all -- it needs struct sched_attr plus some stuff from sched.h). The situation is, glibc is not going to provide a wrapper for sched_{get,set}attr, thus the need to include linux/sched_types.h directly, which leads to the above problem. Thus, the userspace is left with a few sub-par choices when it wants to use e.g. sched_setattr(2), such as maintaining a copy of struct sched_attr definition, or using some other ugly tricks. OTOH, 'struct sched_param' is well known, defined in POSIX, and it won't be ever changed (as that would break backward compatibility). So, while 'struct sched_param' is indeed part of the kernel uapi, exposing it the way it's done now creates an issue, and hiding it (like this patch does) fixes that issue, hopefully without creating another one: common userspace software rely on libc headers, and as for "special" software (like libc), it looks like glibc and musl do not rely on kernel headers for 'struct sched_param' definition (but let's Cc their mailing lists in case it's otherwise). The alternative to this patch would be to move struct sched_attr to, say, linux/sched.h, or linux/sched/attr.h (the new file). Oh, and here is the previous attempt to fix the issue: https://lore.kernel.org/all/20200528135552.GA87103@google.com/ While I support Linus arguments, the issue is still here and needs to be fixed. [ mingo: Linus is right, this shouldn't be needed - but on the other hand I agree that this header is not really helpful to user-space as-is. So let's pretend that is only about sched_attr, and call this commit a workaround for user-space breakage that it in reality is ... Also, remove the Fixes tag. ] Signed-off-by: Kir Kolyshkin Signed-off-by: Ingo Molnar Cc: Linus Torvalds Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20230808030357.1213829-1-kolyshkin@gmail.com Stable-dep-of: 0664e2c311b9 ("sched/deadline: Fix warning in migrate_enable for boosted tasks") Signed-off-by: Sasha Levin

fanotify: allow reporting errors on failure to open fd

2024-12-14T19:00:05Z

[ Upstream commit 522249f05c5551aec9ec0ba9b6438f1ec19c138d ] When working in "fd mode", fanotify_read() needs to open an fd from a dentry to report event->fd to userspace. Opening an fd from dentry can fail for several reasons. For example, when tasks are gone and we try to open their /proc files or we try to open a WRONLY file like in sysfs or when trying to open a file that was deleted on the remote network server. Add a new flag FAN_REPORT_FD_ERROR for fanotify_init(). For a group with FAN_REPORT_FD_ERROR, we will send the event with the error instead of the open fd, otherwise userspace may not get the error at all. For an overflow event, we report -EBADF to avoid confusing FAN_NOFD with -EPERM. Similarly for pidfd open errors we report either -ESRCH or the open error instead of FAN_NOPIDFD and FAN_EPIDFD. In any case, userspace will not know which file failed to open, so add a debug print for further investigation. Reported-by: Krishna Vivek Vitta Link: https://lore.kernel.org/linux-fsdevel/SI2P153MB07182F3424619EDDD1F393EED46D2@SI2P153MB0718.APCP153.PROD.OUTLOOK.COM/ Signed-off-by: Amir Goldstein Signed-off-by: Jan Kara Link: https://patch.msgid.link/20241003142922.111539-1-amir73il@gmail.com Signed-off-by: Sasha Levin