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2025-03-17bpf: BPF token support for BPF_BTF_GET_FD_BY_IDMykyta Yatsenko
Currently BPF_BTF_GET_FD_BY_ID requires CAP_SYS_ADMIN, which does not allow running it from user namespace. This creates a problem when freplace program running from user namespace needs to query target program BTF. This patch relaxes capable check from CAP_SYS_ADMIN to CAP_BPF and adds support for BPF token that can be passed in attributes to syscall. Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20250317174039.161275-2-mykyta.yatsenko5@gmail.com
2025-03-17lib/interval_tree: add test case for interval_tree_iter_xxx() helpersWei Yang
Verify interval_tree_iter_xxx() helpers could find intersection ranges as expected. [sfr@canb.auug.org.au: some of tools/ uses -Wno-unused-parameter] Link: https://lkml.kernel.org/r/20250312113612.31ac808e@canb.auug.org.au Link: https://lkml.kernel.org/r/20250310074938.26756-5-richard.weiyang@gmail.com Signed-off-by: Wei Yang <richard.weiyang@gmail.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michel Lespinasse <michel@lespinasse.org> Cc: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-03-17lib/rbtree: add random seedWei Yang
Current test use pseudo rand function with fixed seed, which means the test data is the same pattern each time. Add random seed parameter to randomize the test. Link: https://lkml.kernel.org/r/20250310074938.26756-4-richard.weiyang@gmail.com Signed-off-by: Wei Yang <richard.weiyang@gmail.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michel Lespinasse <michel@lespinasse.org> Cc: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-03-17lib/rbtree: enable userland test suite for rbtree related data structureWei Yang
Patch series "lib/interval_tree: add some test cases and cleanup", v2. Since rbtree/augmented tree/interval tree share similar data structure, besides new cases for interval tree, this patch set also does cleanup for others. This patch (of 7): Currently we have some tests for rbtree related data structure, e.g. rbtree, augmented rbtree, interval tree, in lib/ as kernel module. To facilitate the test and debug for those fundamental data structure, this patch enable those tests in userland. Link: https://lkml.kernel.org/r/20250310074938.26756-1-richard.weiyang@gmail.com Link: https://lkml.kernel.org/r/20250310074938.26756-2-richard.weiyang@gmail.com Signed-off-by: Wei Yang <richard.weiyang@gmail.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michel Lespinasse <michel@lespinasse.org> Cc: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-03-16mm: make vma cache SLAB_TYPESAFE_BY_RCUSuren Baghdasaryan
To enable SLAB_TYPESAFE_BY_RCU for vma cache we need to ensure that object reuse before RCU grace period is over will be detected by lock_vma_under_rcu(). Current checks are sufficient as long as vma is detached before it is freed. The only place this is not currently happening is in exit_mmap(). Add the missing vma_mark_detached() in exit_mmap(). Another issue which might trick lock_vma_under_rcu() during vma reuse is vm_area_dup(), which copies the entire content of the vma into a new one, overriding new vma's vm_refcnt and temporarily making it appear as attached. This might trick a racing lock_vma_under_rcu() to operate on a reused vma if it found the vma before it got reused. To prevent this situation, we should ensure that vm_refcnt stays at detached state (0) when it is copied and advances to attached state only after it is added into the vma tree. Introduce vm_area_init_from() which preserves new vma's vm_refcnt and use it in vm_area_dup(). Since all vmas are in detached state with no current readers when they are freed, lock_vma_under_rcu() will not be able to take vm_refcnt after vma got detached even if vma is reused. vma_mark_attached() in modified to include a release fence to ensure all stores to the vma happen before vm_refcnt gets initialized. Finally, make vm_area_cachep SLAB_TYPESAFE_BY_RCU. This will facilitate vm_area_struct reuse and will minimize the number of call_rcu() calls. [surenb@google.com: remove atomic_set_release() usage in tools/] Link: https://lkml.kernel.org/r/20250217054351.2973666-1-surenb@google.com Link: https://lkml.kernel.org/r/20250213224655.1680278-18-surenb@google.com Signed-off-by: Suren Baghdasaryan <surenb@google.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Tested-by: Shivank Garg <shivankg@amd.com> Link: https://lkml.kernel.org/r/5e19ec93-8307-47c2-bb13-3ddf7150624e@amd.com Cc: Christian Brauner <brauner@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: David Howells <dhowells@redhat.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Hugh Dickins <hughd@google.com> Cc: Jann Horn <jannh@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Klara Modin <klarasmodin@gmail.com> Cc: Liam R. Howlett <Liam.Howlett@Oracle.com> Cc: Lokesh Gidra <lokeshgidra@google.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Mateusz Guzik <mjguzik@gmail.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Michal Hocko <mhocko@suse.com> Cc: Minchan Kim <minchan@google.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Pasha Tatashin <pasha.tatashin@soleen.com> Cc: "Paul E . McKenney" <paulmck@kernel.org> Cc: Peter Xu <peterx@redhat.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Shakeel Butt <shakeel.butt@linux.dev> Cc: Sourav Panda <souravpanda@google.com> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Will Deacon <will@kernel.org> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-03-15bpf: Introduce load-acquire and store-release instructionsPeilin Ye
Introduce BPF instructions with load-acquire and store-release semantics, as discussed in [1]. Define 2 new flags: #define BPF_LOAD_ACQ 0x100 #define BPF_STORE_REL 0x110 A "load-acquire" is a BPF_STX | BPF_ATOMIC instruction with the 'imm' field set to BPF_LOAD_ACQ (0x100). Similarly, a "store-release" is a BPF_STX | BPF_ATOMIC instruction with the 'imm' field set to BPF_STORE_REL (0x110). Unlike existing atomic read-modify-write operations that only support BPF_W (32-bit) and BPF_DW (64-bit) size modifiers, load-acquires and store-releases also support BPF_B (8-bit) and BPF_H (16-bit). As an exception, however, 64-bit load-acquires/store-releases are not supported on 32-bit architectures (to fix a build error reported by the kernel test robot). An 8- or 16-bit load-acquire zero-extends the value before writing it to a 32-bit register, just like ARM64 instruction LDARH and friends. Similar to existing atomic read-modify-write operations, misaligned load-acquires/store-releases are not allowed (even if BPF_F_ANY_ALIGNMENT is set). As an example, consider the following 64-bit load-acquire BPF instruction (assuming little-endian): db 10 00 00 00 01 00 00 r0 = load_acquire((u64 *)(r1 + 0x0)) opcode (0xdb): BPF_ATOMIC | BPF_DW | BPF_STX imm (0x00000100): BPF_LOAD_ACQ Similarly, a 16-bit BPF store-release: cb 21 00 00 10 01 00 00 store_release((u16 *)(r1 + 0x0), w2) opcode (0xcb): BPF_ATOMIC | BPF_H | BPF_STX imm (0x00000110): BPF_STORE_REL In arch/{arm64,s390,x86}/net/bpf_jit_comp.c, have bpf_jit_supports_insn(..., /*in_arena=*/true) return false for the new instructions, until the corresponding JIT compiler supports them in arena. [1] https://lore.kernel.org/all/20240729183246.4110549-1-yepeilin@google.com/ Acked-by: Eduard Zingerman <eddyz87@gmail.com> Acked-by: Ilya Leoshkevich <iii@linux.ibm.com> Cc: kernel test robot <lkp@intel.com> Signed-off-by: Peilin Ye <yepeilin@google.com> Link: https://lore.kernel.org/r/a217f46f0e445fbd573a1a024be5c6bf1d5fe716.1741049567.git.yepeilin@google.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-03-15bpf: Allow pre-ordering for bpf cgroup progsYonghong Song
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 <andrii@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20250224230116.283071-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-03-08tools/nolibc: don't use asm/ UAPI headersThomas Weißschuh
The asm/ and asm-generic/ namespaces are implementation details of the UAPI headers and not meant for direct usage. Use the equivalent headers from the linux/ namespace instead. While at it also drop the duplicate include of linux/signal.h from sys.h. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Link: https://lore.kernel.org/r/20250307-nolibc-asm-headers-v2-1-e2a734f25d22@linutronix.de
2025-03-06tools/nolibc: drop outdated example from overview commentLouis Taylor
This behaviour was changed in commit a7604ba149e7 ("tools/nolibc/sys: make open() take a vararg on the 3rd argument"). Signed-off-by: Louis Taylor <louis@kragniz.eu> Link: https://lore.kernel.org/r/20250306184147.208723-4-louis@kragniz.eu Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2025-03-06tools/nolibc: process open() vararg as mode_tLouis Taylor
openat() uses mode_t for this, so also update open() to be consistent. Signed-off-by: Louis Taylor <louis@kragniz.eu> Link: https://lore.kernel.org/r/20250306184147.208723-3-louis@kragniz.eu Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2025-03-06tools/nolibc: always use openat(2) instead of open(2)Louis Taylor
All architectures support openat, so we don't need to make its use conditional. Signed-off-by: Louis Taylor <louis@kragniz.eu> Link: https://lore.kernel.org/r/20250306184147.208723-2-louis@kragniz.eu Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2025-03-06tools/nolibc: add support for openat(2)Louis Taylor
openat is useful to avoid needing to construct relative paths, so expose a wrapper for using it directly. Signed-off-by: Louis Taylor <louis@kragniz.eu> Link: https://lore.kernel.org/r/20250306184147.208723-1-louis@kragniz.eu Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2025-03-05treewide: fix typo 'unsigned __init128' -> 'unsigned __int128'Vincent Mailhol
"int" was misspelled as "init" the code comments in the bits.h and const.h files. Fix the typo. CC: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr> Signed-off-by: Yury Norov <yury.norov@gmail.com>
2025-03-03tools/nolibc: add limits.h shim headerThomas Weißschuh
limits.h is a widely used standard header. Missing it from nolibc requires adoption effort to port applications. Add a shim header which includes the global nolibc.h header. It makes all nolibc symbols available. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Willy Tarreau <w@1wt.eu> Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Acked-by: Willy Tarreau <w@1wt.eu> Acked-by: Shuah Khan <skhan@linuxfoundation.org> Link: https://lore.kernel.org/all/20250226-parse_vdso-nolibc-v2-9-28e14e031ed8@linutronix.de
2025-03-03tools/include: Add uapi/linux/elf.hThomas Weißschuh
It will be used by the vDSO selftests. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Acked-by: Shuah Khan <skhan@linuxfoundation.org> Link: https://lore.kernel.org/all/20250226-parse_vdso-nolibc-v2-7-28e14e031ed8@linutronix.de
2025-02-26tools/nolibc: add support for [v]sscanf()Thomas Weißschuh
These functions are used often, also in selftests. sscanf() itself is also used by kselftest.h itself. The implementation is limited and only supports numeric arguments. Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20250209-nolibc-scanf-v2-1-c29dea32f1cd@weissschuh.net Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2025-02-21Merge tag 'for-netdev' of ↵Jakub Kicinski
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next Martin KaFai Lau says: ==================== pull-request: bpf-next 2025-02-20 We've added 19 non-merge commits during the last 8 day(s) which contain a total of 35 files changed, 1126 insertions(+), 53 deletions(-). The main changes are: 1) Add TCP_RTO_MAX_MS support to bpf_set/getsockopt, from Jason Xing 2) Add network TX timestamping support to BPF sock_ops, from Jason Xing 3) Add TX metadata Launch Time support, from Song Yoong Siang * tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: igc: Add launch time support to XDP ZC igc: Refactor empty frame insertion for launch time support net: stmmac: Add launch time support to XDP ZC selftests/bpf: Add launch time request to xdp_hw_metadata xsk: Add launch time hardware offload support to XDP Tx metadata selftests/bpf: Add simple bpf tests in the tx path for timestamping feature bpf: Support selective sampling for bpf timestamping bpf: Add BPF_SOCK_OPS_TSTAMP_SENDMSG_CB callback bpf: Add BPF_SOCK_OPS_TSTAMP_ACK_CB callback bpf: Add BPF_SOCK_OPS_TSTAMP_SND_HW_CB callback bpf: Add BPF_SOCK_OPS_TSTAMP_SND_SW_CB callback bpf: Add BPF_SOCK_OPS_TSTAMP_SCHED_CB callback net-timestamp: Prepare for isolating two modes of SO_TIMESTAMPING bpf: Disable unsafe helpers in TX timestamping callbacks bpf: Prevent unsafe access to the sock fields in the BPF timestamping callback bpf: Prepare the sock_ops ctx and call bpf prog for TX timestamping bpf: Add networking timestamping support to bpf_get/setsockopt() selftests/bpf: Add rto max for bpf_setsockopt test bpf: Support TCP_RTO_MAX_MS for bpf_setsockopt ==================== Link: https://patch.msgid.link/20250221022104.386462-1-martin.lau@linux.dev Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-20xsk: Add launch time hardware offload support to XDP Tx metadataSong Yoong Siang
Extend the XDP Tx metadata framework so that user can requests launch time hardware offload, where the Ethernet device will schedule the packet for transmission at a pre-determined time called launch time. The value of launch time is communicated from user space to Ethernet driver via launch_time field of struct xsk_tx_metadata. Suggested-by: Stanislav Fomichev <sdf@fomichev.me> Signed-off-by: Song Yoong Siang <yoong.siang.song@intel.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Acked-by: Stanislav Fomichev <sdf@fomichev.me> Acked-by: Jakub Kicinski <kuba@kernel.org> Link: https://patch.msgid.link/20250216093430.957880-2-yoong.siang.song@intel.com
2025-02-20bpf: Add BPF_SOCK_OPS_TSTAMP_SENDMSG_CB callbackJason Xing
This patch introduces a new callback in tcp_tx_timestamp() to correlate tcp_sendmsg timestamp with timestamps from other tx timestamping callbacks (e.g., SND/SW/ACK). Without this patch, BPF program wouldn't know which timestamps belong to which flow because of no socket lock protection. This new callback is inserted in tcp_tx_timestamp() to address this issue because tcp_tx_timestamp() still owns the same socket lock with tcp_sendmsg_locked() in the meanwhile tcp_tx_timestamp() initializes the timestamping related fields for the skb, especially tskey. The tskey is the bridge to do the correlation. For TCP, BPF program hooks the beginning of tcp_sendmsg_locked() and then stores the sendmsg timestamp at the bpf_sk_storage, correlating this timestamp with its tskey that are later used in other sending timestamping callbacks. Signed-off-by: Jason Xing <kerneljasonxing@gmail.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250220072940.99994-11-kerneljasonxing@gmail.com
2025-02-20bpf: Add BPF_SOCK_OPS_TSTAMP_ACK_CB callbackJason Xing
Support the ACK case for bpf timestamping. Add a new sock_ops callback, BPF_SOCK_OPS_TSTAMP_ACK_CB. This callback will occur at the same timestamping point as the user space's SCM_TSTAMP_ACK. The BPF program can use it to get the same SCM_TSTAMP_ACK timestamp without modifying the user-space application. This patch extends txstamp_ack to two bits: 1 stands for SO_TIMESTAMPING mode, 2 bpf extension. Signed-off-by: Jason Xing <kerneljasonxing@gmail.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250220072940.99994-10-kerneljasonxing@gmail.com
2025-02-20bpf: Add BPF_SOCK_OPS_TSTAMP_SND_HW_CB callbackJason Xing
Support hw SCM_TSTAMP_SND case for bpf timestamping. Add a new sock_ops callback, BPF_SOCK_OPS_TSTAMP_SND_HW_CB. This callback will occur at the same timestamping point as the user space's hardware SCM_TSTAMP_SND. The BPF program can use it to get the same SCM_TSTAMP_SND timestamp without modifying the user-space application. To avoid increasing the code complexity, replace SKBTX_HW_TSTAMP with SKBTX_HW_TSTAMP_NOBPF instead of changing numerous callers from driver side using SKBTX_HW_TSTAMP. The new definition of SKBTX_HW_TSTAMP means the combination tests of socket timestamping and bpf timestamping. After this patch, drivers can work under the bpf timestamping. Considering some drivers don't assign the skb with hardware timestamp, this patch does the assignment and then BPF program can acquire the hwstamp from skb directly. Signed-off-by: Jason Xing <kerneljasonxing@gmail.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250220072940.99994-9-kerneljasonxing@gmail.com
2025-02-20bpf: Add BPF_SOCK_OPS_TSTAMP_SND_SW_CB callbackJason Xing
Support sw SCM_TSTAMP_SND case for bpf timestamping. Add a new sock_ops callback, BPF_SOCK_OPS_TSTAMP_SND_SW_CB. This callback will occur at the same timestamping point as the user space's software SCM_TSTAMP_SND. The BPF program can use it to get the same SCM_TSTAMP_SND timestamp without modifying the user-space application. Based on this patch, BPF program will get the software timestamp when the driver is ready to send the skb. In the sebsequent patch, the hardware timestamp will be supported. Signed-off-by: Jason Xing <kerneljasonxing@gmail.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250220072940.99994-8-kerneljasonxing@gmail.com
2025-02-20bpf: Add BPF_SOCK_OPS_TSTAMP_SCHED_CB callbackJason Xing
Support SCM_TSTAMP_SCHED case for bpf timestamping. Add a new sock_ops callback, BPF_SOCK_OPS_TSTAMP_SCHED_CB. This callback will occur at the same timestamping point as the user space's SCM_TSTAMP_SCHED. The BPF program can use it to get the same SCM_TSTAMP_SCHED timestamp without modifying the user-space application. A new SKBTX_BPF flag is added to mark skb_shinfo(skb)->tx_flags, ensuring that the new BPF timestamping and the current user space's SO_TIMESTAMPING do not interfere with each other. Signed-off-by: Jason Xing <kerneljasonxing@gmail.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250220072940.99994-7-kerneljasonxing@gmail.com
2025-02-20bpf: Add networking timestamping support to bpf_get/setsockopt()Jason Xing
The new SK_BPF_CB_FLAGS and new SK_BPF_CB_TX_TIMESTAMPING are added to bpf_get/setsockopt. The later patches will implement the BPF networking timestamping. The BPF program will use bpf_setsockopt(SK_BPF_CB_FLAGS, SK_BPF_CB_TX_TIMESTAMPING) to enable the BPF networking timestamping on a socket. Signed-off-by: Jason Xing <kerneljasonxing@gmail.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250220072940.99994-2-kerneljasonxing@gmail.com
2025-02-20tools/nolibc: add support for 32-bit s390Thomas Weißschuh
32-bit s390 is very close to the existing 64-bit implementation. Some special handling is necessary as there is neither LLVM nor QEMU support. Also the kernel itself can not build natively for 32-bit s390, so instead the test program is executed with a 64-bit kernel. Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20250206-nolibc-s390-v2-2-991ad97e3d58@weissschuh.net Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2025-02-17netdev-genl: Add an XSK attribute to queuesJoe Damato
Expose a new per-queue nest attribute, xsk, which will be present for queues that are being used for AF_XDP. If the queue is not being used for AF_XDP, the nest will not be present. In the future, this attribute can be extended to include more data about XSK as it is needed. Signed-off-by: Joe Damato <jdamato@fastly.com> Suggested-by: Jakub Kicinski <kuba@kernel.org> Link: https://patch.msgid.link/20250214211255.14194-3-jdamato@fastly.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-12bpf: Sync uapi bpf.h header for the tooling infraYonghong Song
Commit 0abff462d802 ("bpf: Add comment about helper freeze") missed the tooling header sync. Fix it. Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20250213050427.2788837-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-02-09tools/nolibc: add support for directory accessThomas Weißschuh
Add an implementation for directory access operations. To keep nolibc itself allocation-free, a "DIR *" does not point to any data, but directly encodes a filedescriptor number, equivalent to "FILE *". Without any per-directory storage it is not possible to implement readdir() POSIX confirming. Instead only readdir_r() is provided. While readdir_r() is deprecated in glibc, the reasons for that are not applicable to nolibc. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Link: https://lore.kernel.org/r/20250209-nolibc-dir-v2-2-57cc1da8558b@weissschuh.net Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2025-02-09tools/nolibc: add support for sys_llseek()Thomas Weißschuh
Not all architectures have the old sys_lseek(), notably riscv32. Implement lseek() in terms of sys_llseek() in that case. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Link: https://lore.kernel.org/r/20250209-nolibc-dir-v2-1-57cc1da8558b@weissschuh.net Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2025-02-06netdev: add io_uring memory provider infoDavid Wei
Add a nested attribute for io_uring memory provider info. For now it is empty and its presence indicates that a particular page pool or queue has an io_uring memory provider attached. $ ./cli.py --spec netlink/specs/netdev.yaml --dump page-pool-get [{'id': 80, 'ifindex': 2, 'inflight': 64, 'inflight-mem': 262144, 'napi-id': 525}, {'id': 79, 'ifindex': 2, 'inflight': 320, 'inflight-mem': 1310720, 'io_uring': {}, 'napi-id': 525}, ... $ ./cli.py --spec netlink/specs/netdev.yaml --dump queue-get [{'id': 0, 'ifindex': 1, 'type': 'rx'}, {'id': 0, 'ifindex': 1, 'type': 'tx'}, {'id': 0, 'ifindex': 2, 'napi-id': 513, 'type': 'rx'}, {'id': 1, 'ifindex': 2, 'napi-id': 514, 'type': 'rx'}, ... {'id': 12, 'ifindex': 2, 'io_uring': {}, 'napi-id': 525, 'type': 'rx'}, ... Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: David Wei <dw@davidwei.uk> Link: https://patch.msgid.link/20250204215622.695511-6-dw@davidwei.uk Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-02-05docs/bpf: Document the semantics of BTF tags with kind_flagIhor Solodrai
Explain the meaning of kind_flag in BTF type_tags and decl_tags. Update uapi btf.h kind_flag comment to reflect the changes. Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20250130201239.1429648-3-ihor.solodrai@linux.dev
2025-02-03tools/nolibc: make signature of ioctl() more flexibleThomas Weißschuh
POSIX defines the signature of ioctl() as follows, to allow passing a pointer or integer without casting: int ioctl(int fildes, int request, ... /* arg */); Nolibc ioctl() expects a pointer, forcing the user to manually cast. Using va_arg to make the signature more flexible would work but seems to prevent inlining of the function. Instead use a macro. "fd" and "req" will still be typechecked through sys_ioctl(). Acked-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2025-02-03tools/nolibc: add prototypes for non-static functionsThomas Weißschuh
With -Wmissing-prototypes the compiler will warn about non-static functions which don't have a prototype defined. This warning doesn't make much sense for nolibc itself but for user code it is still useful. To pacify the compiler add prototypes next to the function definitions, similar to how it is handled elsewhere in the kernel. Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20250123-nolibc-prototype-v1-1-e1afc5c1999a@weissschuh.net Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2025-01-28Merge tag 'arm64-upstream' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull KVM/arm64 updates from Will Deacon: "New features: - Support for non-protected guest in protected mode, achieving near feature parity with the non-protected mode - Support for the EL2 timers as part of the ongoing NV support - Allow control of hardware tracing for nVHE/hVHE Improvements, fixes and cleanups: - Massive cleanup of the debug infrastructure, making it a bit less awkward and definitely easier to maintain. This should pave the way for further optimisations - Complete rewrite of pKVM's fixed-feature infrastructure, aligning it with the rest of KVM and making the code easier to follow - Large simplification of pKVM's memory protection infrastructure - Better handling of RES0/RES1 fields for memory-backed system registers - Add a workaround for Qualcomm's Snapdragon X CPUs, which suffer from a pretty nasty timer bug - Small collection of cleanups and low-impact fixes" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (87 commits) arm64/sysreg: Get rid of TRFCR_ELx SysregFields KVM: arm64: nv: Fix doc header layout for timers KVM: arm64: nv: Apply RESx settings to sysreg reset values KVM: arm64: nv: Always evaluate HCR_EL2 using sanitising accessors KVM: arm64: Fix selftests after sysreg field name update coresight: Pass guest TRFCR value to KVM KVM: arm64: Support trace filtering for guests KVM: arm64: coresight: Give TRBE enabled state to KVM coresight: trbe: Remove redundant disable call arm64/sysreg/tools: Move TRFCR definitions to sysreg tools: arm64: Update sysreg.h header files KVM: arm64: Drop pkvm_mem_transition for host/hyp donations KVM: arm64: Drop pkvm_mem_transition for host/hyp sharing KVM: arm64: Drop pkvm_mem_transition for FF-A KVM: arm64: Explicitly handle BRBE traps as UNDEFINED KVM: arm64: vgic: Use str_enabled_disabled() in vgic_v3_probe() arm64: kvm: Introduce nvhe stack size constants KVM: arm64: Fix nVHE stacktrace VA bits mask KVM: arm64: Fix FEAT_MTE in pKVM Documentation: Update the behaviour of "kvm-arm.mode" ...
2025-01-23Merge tag 'bpf-next-6.14' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next Pull bpf updates from Alexei Starovoitov: "A smaller than usual release cycle. The main changes are: - Prepare selftest to run with GCC-BPF backend (Ihor Solodrai) In addition to LLVM-BPF runs the BPF CI now runs GCC-BPF in compile only mode. Half of the tests are failing, since support for btf_decl_tag is still WIP, but this is a great milestone. - Convert various samples/bpf to selftests/bpf/test_progs format (Alexis Lothoré and Bastien Curutchet) - Teach verifier to recognize that array lookup with constant in-range index will always succeed (Daniel Xu) - Cleanup migrate disable scope in BPF maps (Hou Tao) - Fix bpf_timer destroy path in PREEMPT_RT (Hou Tao) - Always use bpf_mem_alloc in bpf_local_storage in PREEMPT_RT (Martin KaFai Lau) - Refactor verifier lock support (Kumar Kartikeya Dwivedi) This is a prerequisite for upcoming resilient spin lock. - Remove excessive 'may_goto +0' instructions in the verifier that LLVM leaves when unrolls the loops (Yonghong Song) - Remove unhelpful bpf_probe_write_user() warning message (Marco Elver) - Add fd_array_cnt attribute for prog_load command (Anton Protopopov) This is a prerequisite for upcoming support for static_branch" * tag 'bpf-next-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (125 commits) selftests/bpf: Add some tests related to 'may_goto 0' insns bpf: Remove 'may_goto 0' instruction in opt_remove_nops() bpf: Allow 'may_goto 0' instruction in verifier selftests/bpf: Add test case for the freeing of bpf_timer bpf: Cancel the running bpf_timer through kworker for PREEMPT_RT bpf: Free element after unlock in __htab_map_lookup_and_delete_elem() bpf: Bail out early in __htab_map_lookup_and_delete_elem() bpf: Free special fields after unlock in htab_lru_map_delete_node() tools: Sync if_xdp.h uapi tooling header libbpf: Work around kernel inconsistently stripping '.llvm.' suffix bpf: selftests: verifier: Add nullness elision tests bpf: verifier: Support eliding map lookup nullness bpf: verifier: Refactor helper access type tracking bpf: tcp: Mark bpf_load_hdr_opt() arg2 as read-write bpf: verifier: Add missing newline on verbose() call selftests/bpf: Add distilled BTF test about marking BTF_IS_EMBEDDED libbpf: Fix incorrect traversal end type ID when marking BTF_IS_EMBEDDED libbpf: Fix return zero when elf_begin failed selftests/bpf: Fix btf leak on new btf alloc failure in btf_distill test veristat: Load struct_ops programs only once ...
2025-01-22Merge tag 'linux_kselftest-nolibc-6.14-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull nolibc updates from Shuah Khan: - add support for waitid() - use waitid() over waitpid() - use a pipe in vfprintf tests - skip tests for unimplemented syscalls - rename riscv to riscv64 - add configurations for riscv32 - add detecting missing toolchain to run-tests.sh * tag 'linux_kselftest-nolibc-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: selftests/nolibc: add configurations for riscv32 selftests/nolibc: rename riscv to riscv64 selftests/nolibc: skip tests for unimplemented syscalls selftests/nolibc: use a pipe to in vfprintf tests selftests/nolibc: use waitid() over waitpid() tools/nolibc: add support for waitid() selftests/nolibc: run-tests.sh: detect missing toolchain
2025-01-22Merge tag 'net-next-6.14' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Paolo Abeni: "This is slightly smaller than usual, with the most interesting work being still around RTNL scope reduction. Core: - More core refactoring to reduce the RTNL lock contention, including preparatory work for the per-network namespace RTNL lock, replacing RTNL lock with a per device-one to protect NAPI-related net device data and moving synchronize_net() calls outside such lock. - Extend drop reasons usage, adding net scheduler, AF_UNIX, bridge and more specific TCP coverage. - Reduce network namespace tear-down time by removing per-subsystems synchronize_net() in tipc and sched. - Add flow label selector support for fib rules, allowing traffic redirection based on such header field. Netfilter: - Do not remove netdev basechain when last device is gone, allowing netdev basechains without devices. - Revisit the flowtable teardown strategy, dealing better with fin, reset and re-open events. - Scale-up IP-vs connection dumping by avoiding linear search on each restart. Protocols: - A significant XDP socket refactor, consolidating and optimizing several helpers into the core - Better scaling of ICMP rate-limiting, by removing false-sharing in inet peers handling. - Introduces netlink notifications for multicast IPv4 and IPv6 address changes. - Add ipsec support for IP-TFS/AggFrag encapsulation, allowing aggregation and fragmentation of the inner IP. - Add sysctl to configure TIME-WAIT reuse delay for TCP sockets, to avoid local port exhaustion issues when the average connection lifetime is very short. - Support updating keys (re-keying) for connections using kernel TLS (for TLS 1.3 only). - Support ipv4-mapped ipv6 address clients in smc-r v2. - Add support for jumbo data packet transmission in RxRPC sockets, gluing multiple data packets in a single UDP packet. - Support RxRPC RACK-TLP to manage packet loss and retransmission in conjunction with the congestion control algorithm. Driver API: - Introduce a unified and structured interface for reporting PHY statistics, exposing consistent data across different H/W via ethtool. - Make timestamping selectable, allow the user to select the desired hwtstamp provider (PHY or MAC) administratively. - Add support for configuring a header-data-split threshold (HDS) value via ethtool, to deal with partial or buggy H/W implementation. - Consolidate DSA drivers Energy Efficiency Ethernet support. - Add EEE management to phylink, making use of the phylib implementation. - Add phylib support for in-band capabilities negotiation. - Simplify how phylib-enabled mac drivers expose the supported interfaces. Tests and tooling: - Make the YNL tool package-friendly to make it easier to deploy it separately from the kernel. - Increase TCP selftest coverage importing several packetdrill test-cases. - Regenerate the ethtool uapi header from the YNL spec, to ease maintenance and future development. - Add YNL support for decoding the link types used in net self-tests, allowing a single build to run both net and drivers/net. Drivers: - Ethernet high-speed NICs: - nVidia/Mellanox (mlx5): - add cross E-Switch QoS support - add SW Steering support for ConnectX-8 - implement support for HW-Managed Flow Steering, improving the rule deletion/insertion rate - support for multi-host LAG - Intel (ixgbe, ice, igb): - ice: add support for devlink health events - ixgbe: add initial support for E610 chipset variant - igb: add support for AF_XDP zero-copy - Meta: - add support for basic RSS config - allow changing the number of channels - add hardware monitoring support - Broadcom (bnxt): - implement TCP data split and HDS threshold ethtool support, enabling Device Memory TCP. - Marvell Octeon: - implement egress ipsec offload support for the cn10k family - Hisilicon (HIBMC): - implement unicast MAC filtering - Ethernet NICs embedded and virtual: - Convert UDP tunnel drivers to NETDEV_PCPU_STAT_DSTATS, avoiding contented atomic operations for drop counters - Freescale: - quicc: phylink conversion - enetc: support Tx and Rx checksum offload and improve TSO performances - MediaTek: - airoha: introduce support for ETS and HTB Qdisc offload - Microchip: - lan78XX USB: preparation work for phylink conversion - Synopsys (stmmac): - support DWMAC IP on NXP Automotive SoCs S32G2xx/S32G3xx/S32R45 - refactor EEE support to leverage the new driver API - optimize DMA and cache access to increase raw RX performances by 40% - TI: - icssg-prueth: add multicast filtering support for VLAN interface - netkit: - add ability to configure head/tailroom - VXLAN: - accepts packets with user-defined reserved bit - Ethernet switches: - Microchip: - lan969x: add RGMII support - lan969x: improve TX and RX performance using the FDMA engine - nVidia/Mellanox: - move Tx header handling to PCI driver, to ease XDP support - Ethernet PHYs: - Texas Instruments DP83822: - add support for GPIO2 clock output - Realtek: - 8169: add support for RTL8125D rev.b - rtl822x: add hwmon support for the temperature sensor - Microchip: - add support for RDS PTP hardware - consolidate periodic output signal generation - CAN: - several DT-bindings to DT schema conversions - tcan4x5x: - add HW standby support - support nWKRQ voltage selection - kvaser: - allowing Bus Error Reporting runtime configuration - WiFi: - the on-going Multi-Link Operation (MLO) effort continues, affecting both the stack and in drivers - mac80211/cfg80211: - Emergency Preparedness Communication Services (EPCS) station mode support - support for adding and removing station links for MLO - add support for WiFi 7/EHT mesh over 320 MHz channels - report Tx power info for each link - RealTek (rtw88): - enable USB Rx aggregation and USB 3 to improve performance - LED support - RealTek (rtw89): - refactor power save to support Multi-Link Operations - add support for RTL8922AE-VS variant - MediaTek (mt76): - single wiphy multiband support (preparation for MLO) - p2p device support - add TP-Link TXE50UH USB adapter support - Qualcomm (ath10k): - support for the QCA6698AQ IP core - Qualcomm (ath12k): - enable MLO for QCN9274 - Bluetooth: - Allow sysfs to trigger hdev reset, to allow recovering devices not responsive from user-space - MediaTek: add support for MT7922, MT7925, MT7921e devices - Realtek: add support for RTL8851BE devices - Qualcomm: add support for WCN785x devices - ISO: allow BIG re-sync" * tag 'net-next-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1386 commits) net/rose: prevent integer overflows in rose_setsockopt() net: phylink: fix regression when binding a PHY net: ethernet: ti: am65-cpsw: streamline TX queue creation and cleanup net: ethernet: ti: am65-cpsw: streamline RX queue creation and cleanup net: ethernet: ti: am65-cpsw: ensure proper channel cleanup in error path ipv6: Convert inet6_rtm_deladdr() to per-netns RTNL. ipv6: Convert inet6_rtm_newaddr() to per-netns RTNL. ipv6: Move lifetime validation to inet6_rtm_newaddr(). ipv6: Set cfg.ifa_flags before device lookup in inet6_rtm_newaddr(). ipv6: Pass dev to inet6_addr_add(). ipv6: Convert inet6_ioctl() to per-netns RTNL. ipv6: Hold rtnl_net_lock() in addrconf_init() and addrconf_cleanup(). ipv6: Hold rtnl_net_lock() in addrconf_dad_work(). ipv6: Hold rtnl_net_lock() in addrconf_verify_work(). ipv6: Convert net.ipv6.conf.${DEV}.XXX sysctl to per-netns RTNL. ipv6: Add __in6_dev_get_rtnl_net(). net: stmmac: Drop redundant skb_mark_for_recycle() for SKB frags net: mii: Fix the Speed display when the network cable is not connected sysctl net: Remove macro checks for CONFIG_SYSCTL eth: bnxt: update header sizing defaults ...
2025-01-21Merge tag 'objtool-core-2025-01-20' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull objtool updates from Ingo Molnar: - Introduce the generic section-based annotation infrastructure a.k.a. ASM_ANNOTATE/ANNOTATE (Peter Zijlstra) - Convert various facilities to ASM_ANNOTATE/ANNOTATE: (Peter Zijlstra) - ANNOTATE_NOENDBR - ANNOTATE_RETPOLINE_SAFE - instrumentation_{begin,end}() - VALIDATE_UNRET_BEGIN - ANNOTATE_IGNORE_ALTERNATIVE - ANNOTATE_INTRA_FUNCTION_CALL - {.UN}REACHABLE - Optimize the annotation-sections parsing code (Peter Zijlstra) - Centralize annotation definitions in <linux/objtool.h> - Unify & simplify the barrier_before_unreachable()/unreachable() definitions (Peter Zijlstra) - Convert unreachable() calls to BUG() in x86 code, as unreachable() has unreliable code generation (Peter Zijlstra) - Remove annotate_reachable() and annotate_unreachable(), as it's unreliable against compiler optimizations (Peter Zijlstra) - Fix non-standard ANNOTATE_REACHABLE annotation order (Peter Zijlstra) - Robustify the annotation code by warning about unknown annotation types (Peter Zijlstra) - Allow arch code to discover jump table size, in preparation of annotated jump table support (Ard Biesheuvel) * tag 'objtool-core-2025-01-20' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm: Convert unreachable() to BUG() objtool: Allow arch code to discover jump table size objtool: Warn about unknown annotation types objtool: Fix ANNOTATE_REACHABLE to be a normal annotation objtool: Convert {.UN}REACHABLE to ANNOTATE objtool: Remove annotate_{,un}reachable() loongarch: Use ASM_REACHABLE x86: Convert unreachable() to BUG() unreachable: Unify objtool: Collect more annotations in objtool.h objtool: Collapse annotate sequences objtool: Convert ANNOTATE_INTRA_FUNCTION_CALL to ANNOTATE objtool: Convert ANNOTATE_IGNORE_ALTERNATIVE to ANNOTATE objtool: Convert VALIDATE_UNRET_BEGIN to ANNOTATE objtool: Convert instrumentation_{begin,end}() to ANNOTATE objtool: Convert ANNOTATE_RETPOLINE_SAFE to ANNOTATE objtool: Convert ANNOTATE_NOENDBR to ANNOTATE objtool: Generic annotation infrastructure
2025-01-17tools: Sync if_xdp.h uapi tooling headerVishal Chourasia
Sync if_xdp.h uapi header to remove following warning: Warning: Kernel ABI header at 'tools/include/uapi/linux/if_xdp.h' differs from latest version at 'include/uapi/linux/if_xdp.h' Fixes: 48eb03dd2630 ("xsk: Add TX timestamp and TX checksum offload support") Signed-off-by: Vishal Chourasia <vishalc@linux.ibm.com> Signed-off-by: Song Yoong Siang <yoong.siang.song@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20250115032248.125742-1-yoong.siang.song@intel.com
2025-01-13tools/nolibc: add support for waitid()Thomas Weißschuh
waitid() is the modern variant of the family of wait-like syscalls. Some architectures have dropped support for wait(), wait4() and waitpid() but all of them support waitid(). It is more flexible and easier to use than the older ones. Link: https://lore.kernel.org/r/20241221-nolibc-rv32-v1-1-d9ef6dab7c63@weissschuh.net Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2025-01-12tools: arm64: Update sysreg.h header filesJames Clark
Created with the following: cp include/linux/kasan-tags.h tools/include/linux/ cp arch/arm64/include/asm/sysreg.h tools/arch/arm64/include/asm/ Update the tools copy of sysreg.h so that the next commit to add a new register doesn't have unrelated changes in it. Because the new version of sysreg.h includes kasan-tags.h, that file also now needs to be copied into tools. Acked-by: Mark Brown <broonie@kernel.org> Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: James Clark <james.clark@arm.com> Signed-off-by: James Clark <james.clark@linaro.org> Link: https://lore.kernel.org/r/20250106142446.628923-3-james.clark@linaro.org Signed-off-by: Marc Zyngier <maz@kernel.org>
2025-01-07Merge tag 'for-netdev' of ↵Jakub Kicinski
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next Daniel Borkmann says: ==================== pull-request: bpf-next 2025-01-07 We've added 7 non-merge commits during the last 32 day(s) which contain a total of 11 files changed, 190 insertions(+), 103 deletions(-). The main changes are: 1) Migrate the test_xdp_meta.sh BPF selftest into test_progs framework, from Bastien Curutchet. 2) Add ability to configure head/tailroom for netkit devices, from Daniel Borkmann. 3) Fixes and improvements to the xdp_hw_metadata selftest, from Song Yoong Siang. * tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: selftests/bpf: Extend netkit tests to validate set {head,tail}room netkit: Add add netkit {head,tail}room to rt_link.yaml netkit: Allow for configuring needed_{head,tail}room selftests/bpf: Migrate test_xdp_meta.sh into xdp_context_test_run.c selftests/bpf: test_xdp_meta: Rename BPF sections selftests/bpf: Enable Tx hwtstamp in xdp_hw_metadata selftests/bpf: Actuate tx_metadata_len in xdp_hw_metadata ==================== Link: https://patch.msgid.link/20250107130908.143644-1-daniel@iogearbox.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-01-06netkit: Allow for configuring needed_{head,tail}roomDaniel Borkmann
Allow the user to configure needed_{head,tail}room for both netkit devices. The idea is similar to 163e529200af ("veth: implement ndo_set_rx_headroom") with the difference that the two parameters can be specified upon device creation. By default the current behavior stays as is which is needed_{head,tail}room is 0. In case of Cilium, for example, the netkit devices are not enslaved into a bridge or openvswitch device (rather, BPF-based redirection is used out of tcx), and as such these parameters are not propagated into the Pod's netns via peer device. Given Cilium can run in vxlan/geneve tunneling mode (needed_headroom) and/or be used in combination with WireGuard (needed_{head,tail}room), allow the Cilium CNI plugin to specify these two upon netkit device creation. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Nikolay Aleksandrov <razor@blackwall.org> Link: https://lore.kernel.org/bpf/20241220234658.490686-1-daniel@iogearbox.net
2025-01-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Cross-merge networking fixes after downstream PR (net-6.13-rc6). No conflicts. Adjacent changes: include/linux/if_vlan.h f91a5b808938 ("af_packet: fix vlan_get_protocol_dgram() vs MSG_PEEK") 3f330db30638 ("net: reformat kdoc return statements") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-12-27Merge tag 'hardening-v6.13-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull hardening fix from Kees Cook: - stddef: make __struct_group() UAPI C++-friendly (Alexander Lobakin) * tag 'hardening-v6.13-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: stddef: make __struct_group() UAPI C++-friendly
2024-12-20stddef: make __struct_group() UAPI C++-friendlyAlexander Lobakin
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::<unnamed union>::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 <cferris@google.com> Closes: https://lore.kernel.org/linux-hardening/Z1HZpe3WE5As8UAz@google.com Suggested-by: Kees Cook <kees@kernel.org> # __struct_group_tag() Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20241219135734.2130002-1-aleksander.lobakin@intel.com Signed-off-by: Kees Cook <kees@kernel.org>
2024-12-19Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netJakub Kicinski
Cross-merge networking fixes after downstream PR (net-6.13-rc4). No conflicts. Adjacent changes: drivers/net/ethernet/renesas/rswitch.h 32fd46f5b69e ("net: renesas: rswitch: remove speed from gwca structure") 922b4b955a03 ("net: renesas: rswitch: rework ts tags management") Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-12-16sock: Introduce SO_RCVPRIORITY socket optionAnna Emese Nyiri
Add new socket option, SO_RCVPRIORITY, to include SO_PRIORITY in the ancillary data returned by recvmsg(). This is analogous to the existing support for SO_RCVMARK, as implemented in commit 6fd1d51cfa253 ("net: SO_RCVMARK socket option for SO_MARK with recvmsg()"). Reviewed-by: Willem de Bruijn <willemb@google.com> Suggested-by: Ferenc Fejes <fejes@inf.elte.hu> Signed-off-by: Anna Emese Nyiri <annaemesenyiri@gmail.com> Link: https://patch.msgid.link/20241213084457.45120-5-annaemesenyiri@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-12-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfAlexei Starovoitov
Cross-merge bpf fixes after downstream PR. No conflicts. Adjacent changes in: Auto-merging include/linux/bpf.h Auto-merging include/linux/bpf_verifier.h Auto-merging kernel/bpf/btf.c Auto-merging kernel/bpf/verifier.c Auto-merging kernel/trace/bpf_trace.c Auto-merging tools/testing/selftests/bpf/progs/test_tp_btf_nullable.c Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-12-13bpf: Add fd_array_cnt attribute for prog_loadAnton Protopopov
The fd_array attribute of the BPF_PROG_LOAD syscall may contain a set of file descriptors: maps or btfs. This field was introduced as a sparse array. Introduce a new attribute, fd_array_cnt, which, if present, indicates that the fd_array is a continuous array of the corresponding length. If fd_array_cnt is non-zero, then every map in the fd_array will be bound to the program, as if it was used by the program. This functionality is similar to the BPF_PROG_BIND_MAP syscall, but such maps can be used by the verifier during the program load. Signed-off-by: Anton Protopopov <aspsk@isovalent.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20241213130934.1087929-5-aspsk@isovalent.com
generated by cgit (git 2.34.1) at 2025-07-15 21:25:28 +0000