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authorLinus Torvalds <torvalds@linux-foundation.org>2024-11-21 08:11:04 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2024-11-21 08:11:04 -0800
commit6e95ef0258ff4ee23ae3b06bf6b00b33dbbd5ef7 (patch)
tree07f66723c602ab3b085d890d7fef898a61bb539c /mm
parent43fb83c17ba2d63dfb798f0be7453ed55ca3f9c2 (diff)
parent2c8b09ac2537299511c898bc71b1a5f2756c831c (diff)
downloadlwn-6e95ef0258ff4ee23ae3b06bf6b00b33dbbd5ef7.tar.gz
lwn-6e95ef0258ff4ee23ae3b06bf6b00b33dbbd5ef7.zip
Merge tag 'bpf-next-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Pull bpf updates from Alexei Starovoitov: - Add BPF uprobe session support (Jiri Olsa) - Optimize uprobe performance (Andrii Nakryiko) - Add bpf_fastcall support to helpers and kfuncs (Eduard Zingerman) - Avoid calling free_htab_elem() under hash map bucket lock (Hou Tao) - Prevent tailcall infinite loop caused by freplace (Leon Hwang) - Mark raw_tracepoint arguments as nullable (Kumar Kartikeya Dwivedi) - Introduce uptr support in the task local storage map (Martin KaFai Lau) - Stringify errno log messages in libbpf (Mykyta Yatsenko) - Add kmem_cache BPF iterator for perf's lock profiling (Namhyung Kim) - Support BPF objects of either endianness in libbpf (Tony Ambardar) - Add ksym to struct_ops trampoline to fix stack trace (Xu Kuohai) - Introduce private stack for eligible BPF programs (Yonghong Song) - Migrate samples/bpf tests to selftests/bpf test_progs (Daniel T. Lee) - Migrate test_sock to selftests/bpf test_progs (Jordan Rife) * tag 'bpf-next-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (152 commits) libbpf: Change hash_combine parameters from long to unsigned long selftests/bpf: Fix build error with llvm 19 libbpf: Fix memory leak in bpf_program__attach_uprobe_multi bpf: use common instruction history across all states bpf: Add necessary migrate_disable to range_tree. bpf: Do not alloc arena on unsupported arches selftests/bpf: Set test path for token/obj_priv_implicit_token_envvar selftests/bpf: Add a test for arena range tree algorithm bpf: Introduce range_tree data structure and use it in bpf arena samples/bpf: Remove unused variable in xdp2skb_meta_kern.c samples/bpf: Remove unused variables in tc_l2_redirect_kern.c bpftool: Cast variable `var` to long long bpf, x86: Propagate tailcall info only for subprogs bpf: Add kernel symbol for struct_ops trampoline bpf: Use function pointers count as struct_ops links count bpf: Remove unused member rcu from bpf_struct_ops_map selftests/bpf: Add struct_ops prog private stack tests bpf: Support private stack for struct_ops progs selftests/bpf: Add tracing prog private stack tests bpf, x86: Support private stack in jit ...
Diffstat (limited to 'mm')
-rw-r--r--mm/slab_common.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 893d32059915..a7174455db9f 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -1332,6 +1332,25 @@ size_t ksize(const void *objp)
}
EXPORT_SYMBOL(ksize);
+#ifdef CONFIG_BPF_SYSCALL
+#include <linux/btf.h>
+
+__bpf_kfunc_start_defs();
+
+__bpf_kfunc struct kmem_cache *bpf_get_kmem_cache(u64 addr)
+{
+ struct slab *slab;
+
+ if (!virt_addr_valid((void *)(long)addr))
+ return NULL;
+
+ slab = virt_to_slab((void *)(long)addr);
+ return slab ? slab->slab_cache : NULL;
+}
+
+__bpf_kfunc_end_defs();
+#endif /* CONFIG_BPF_SYSCALL */
+
/* Tracepoints definitions. */
EXPORT_TRACEPOINT_SYMBOL(kmalloc);
EXPORT_TRACEPOINT_SYMBOL(kmem_cache_alloc);