kernel/tools/testing/selftests/bpf/bpf_experimental.h, branch linux-rolling-stable

Merge tag 'pull-f_path' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2025-10-03T23:32:36Z

Pull file->f_path constification from Al Viro: "Only one thing was modifying ->f_path of an opened file - acct(2). Massaging that away and constifying a bunch of struct path * arguments in functions that might be given &file->f_path ends up with the situation where we can turn ->f_path into an anon union of const struct path f_path and struct path __f_path, the latter modified only in a few places in fs/{file_table,open,namei}.c, all for struct file instances that are yet to be opened" * tag 'pull-f_path' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (23 commits) Have cc(1) catch attempts to modify ->f_path kernel/acct.c: saner struct file treatment configfs:get_target() - release path as soon as we grab configfs_item reference apparmor/af_unix: constify struct path * arguments ovl_is_real_file: constify realpath argument ovl_sync_file(): constify path argument ovl_lower_dir(): constify path argument ovl_get_verity_digest(): constify path argument ovl_validate_verity(): constify {meta,data}path arguments ovl_ensure_verity_loaded(): constify datapath argument ksmbd_vfs_set_init_posix_acl(): constify path argument ksmbd_vfs_inherit_posix_acl(): constify path argument ksmbd_vfs_kern_path_unlock(): constify path argument ksmbd_vfs_path_lookup_locked(): root_share_path can be const struct path * check_export(): constify path argument export_operations->open(): constify path argument rqst_exp_get_by_name(): constify path argument nfs: constify path argument of __vfs_getattr() bpf...d_path(): constify path argument done_path_create(): constify path argument ...

bpf...d_path(): constify path argument

2025-09-16T01:17:08Z

Reviewed-by: Jan Kara Reviewed-by: Christian Brauner Signed-off-by: Al Viro

selftests/bpf: Introduce experimental bpf_in_interrupt()

2025-09-04T16:05:58Z

Filtering pid_tgid is meanlingless when the current task is preempted by an interrupt. To address this, introduce 'bpf_in_interrupt()' helper function, which allows BPF programs to determine whether they are executing in interrupt context. 'get_preempt_count()': * On x86, '*(int *) bpf_this_cpu_ptr(&__preempt_count)'. * On arm64, 'bpf_get_current_task_btf()->thread_info.preempt.count'. Then 'bpf_in_interrupt()' will be: * If !PREEMPT_RT, 'get_preempt_count() & (NMI_MASK | HARDIRQ_MASK | SOFTIRQ_MASK)'. * If PREEMPT_RT, '(get_preempt_count() & (NMI_MASK | HARDIRQ_MASK)) | (bpf_get_current_task_btf()->softirq_disable_cnt & SOFTIRQ_MASK)'. As for other archs, it can be added support by updating 'get_preempt_count()'. Suggested-by: Alexei Starovoitov Signed-off-by: Leon Hwang Link: https://lore.kernel.org/r/20250903140438.59517-2-leon.hwang@linux.dev Signed-off-by: Alexei Starovoitov

selftests/bpf: Add tests for bpf_cgroup_read_xattr

2025-07-02T12:18:20Z

Add tests for different scenarios with bpf_cgroup_read_xattr: 1. Read cgroup xattr from bpf_cgroup_from_id; 2. Read cgroup xattr from bpf_cgroup_ancestor; 3. Read cgroup xattr from css_iter; 4. Use bpf_cgroup_read_xattr in LSM hook security_socket_connect. 5. Use bpf_cgroup_read_xattr in cgroup program. Signed-off-by: Song Liu Link: https://lore.kernel.org/20250623063854.1896364-5-song@kernel.org Signed-off-by: Christian Brauner

selftests/bpf: Add test for open coded dmabuf_iter

2025-05-27T16:51:26Z

Use the same test buffers as the traditional iterator and a new BPF map to verify the test buffers can be found with the open coded dmabuf iterator. Signed-off-by: T.J. Mercier Acked-by: Christian König Acked-by: Song Liu Link: https://lore.kernel.org/r/20250522230429.941193-6-tjmercier@google.com Signed-off-by: Alexei Starovoitov

selftests/bpf: Introduce cond_break_label

2025-03-15T18:48:56Z

Add a new cond_break_label macro that jumps to the specified label when the cond_break termination check fires, and allows us to better handle the uncontrolled termination of the loop. Signed-off-by: Kumar Kartikeya Dwivedi Link: https://lore.kernel.org/r/20250306035431.2186189-2-memxor@gmail.com Signed-off-by: Alexei Starovoitov

selftests/bpf: Add a test for open coded kmem_cache iter

2024-11-01T18:08:32Z

The new subtest runs with bpf_prog_test_run_opts() as a syscall prog. It iterates the kmem_cache using bpf_for_each loop and count the number of entries. Finally it checks it with the number of entries from the regular iterator. $ ./vmtest.sh -- ./test_progs -t kmem_cache_iter ... #130/1 kmem_cache_iter/check_task_struct:OK #130/2 kmem_cache_iter/check_slabinfo:OK #130/3 kmem_cache_iter/open_coded_iter:OK #130 kmem_cache_iter:OK Summary: 1/3 PASSED, 0 SKIPPED, 0 FAILED Also simplify the code by using attach routine of the skeleton. Signed-off-by: Namhyung Kim Link: https://lore.kernel.org/r/20241030222819.1800667-2-namhyung@kernel.org Signed-off-by: Alexei Starovoitov

selftests/bpf: add negative tests for new VFS based BPF kfuncs

2024-08-06T16:01:41Z

Add a bunch of negative selftests responsible for asserting that the BPF verifier successfully rejects a BPF program load when the underlying BPF program misuses one of the newly introduced VFS based BPF kfuncs. The following VFS based BPF kfuncs are extensively tested within this new selftest: * struct file *bpf_get_task_exe_file(struct task_struct *); * void bpf_put_file(struct file *); * int bpf_path_d_path(struct path *, char *, size_t); Acked-by: Christian Brauner Acked-by: Song Liu Signed-off-by: Matt Bobrowski Link: https://lore.kernel.org/r/20240731110833.1834742-3-mattbobrowski@google.com Signed-off-by: Alexei Starovoitov

selftests/bpf: amend for wrong bpf_wq_set_callback_impl signature

2024-07-08T17:01:48Z

See the previous patch: the API was wrong, we were provided the pointer to the value, not the actual struct bpf_wq *. Signed-off-by: Benjamin Tissoires Link: https://lore.kernel.org/r/20240708-fix-wq-v2-2-667e5c9fbd99@kernel.org Signed-off-by: Alexei Starovoitov

bpf: Support can_loop/cond_break on big endian

2024-06-14T19:52:40Z

Add big endian support for can_loop/cond_break macros. Signed-off-by: Alexei Starovoitov Signed-off-by: Daniel Borkmann Acked-by: Yonghong Song Link: https://lore.kernel.org/bpf/20240613013815.953-4-alexei.starovoitov@gmail.com