vasilito
dc68054305
- Restore 29 recipe symlinks (libdrm, qtbase, dbus, sddm, pipewire, etc.) - Restore 33 patches (KDE, libdrm, mesa, pipewire, sddm, wireplumber) - Restore 20+ local/scripts (audit, lint, test, build helpers) - Restore src/cook/scheduler.rs, status.rs, gnu-config/ - Restore scripts/patch-inclusion-gate.sh, run_mini1.sh, validate-collision-log.sh - Recover TLC source from HEAD (was overwritten by 0.2.3 checkout) - Recover 11 local/docs plans from HEAD (were overwritten) - Recover qt6-wayland-smoke symlink from HEAD - Fix MOTD: remove garbled ASCII art, use clean text - Update version: 0.2.0 -> 0.2.4 in os-release, motd, config - Reduce filesystem_size: 1536 -> 512 MiB - Add ABSOLUTE RULE to AGENTS.md: never delete/ignore packages - Reduce pcid scheme log verbosity: info -> debug
90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* A pointer that can point to either kernel or userspace memory. */
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#ifndef _LINUX_BPFPTR_H
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#define _LINUX_BPFPTR_H
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#include <linux/mm.h>
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#include <linux/sockptr.h>
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typedef sockptr_t bpfptr_t;
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static inline bool bpfptr_is_kernel(bpfptr_t bpfptr)
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{
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return bpfptr.is_kernel;
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}
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static inline bpfptr_t KERNEL_BPFPTR(void *p)
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{
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return (bpfptr_t) { .kernel = p, .is_kernel = true };
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}
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static inline bpfptr_t USER_BPFPTR(void __user *p)
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{
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return (bpfptr_t) { .user = p };
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}
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static inline bpfptr_t make_bpfptr(u64 addr, bool is_kernel)
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{
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if (is_kernel)
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return KERNEL_BPFPTR((void*) (uintptr_t) addr);
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else
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return USER_BPFPTR(u64_to_user_ptr(addr));
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}
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static inline bool bpfptr_is_null(bpfptr_t bpfptr)
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{
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if (bpfptr_is_kernel(bpfptr))
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return !bpfptr.kernel;
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return !bpfptr.user;
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}
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static inline void bpfptr_add(bpfptr_t *bpfptr, size_t val)
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{
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if (bpfptr_is_kernel(*bpfptr))
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bpfptr->kernel += val;
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else
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bpfptr->user += val;
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}
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static inline int copy_from_bpfptr_offset(void *dst, bpfptr_t src,
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size_t offset, size_t size)
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{
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if (!bpfptr_is_kernel(src))
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return copy_from_user(dst, src.user + offset, size);
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return copy_from_kernel_nofault(dst, src.kernel + offset, size);
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}
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static inline int copy_from_bpfptr(void *dst, bpfptr_t src, size_t size)
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{
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return copy_from_bpfptr_offset(dst, src, 0, size);
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}
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static inline int copy_to_bpfptr_offset(bpfptr_t dst, size_t offset,
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const void *src, size_t size)
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{
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return copy_to_sockptr_offset((sockptr_t) dst, offset, src, size);
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}
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static inline void *kvmemdup_bpfptr_noprof(bpfptr_t src, size_t len)
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{
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void *p = kvmalloc_node_align_noprof(len, 1, GFP_USER | __GFP_NOWARN, NUMA_NO_NODE);
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if (!p)
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return ERR_PTR(-ENOMEM);
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if (copy_from_bpfptr(p, src, len)) {
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kvfree(p);
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return ERR_PTR(-EFAULT);
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}
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return p;
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}
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#define kvmemdup_bpfptr(...) alloc_hooks(kvmemdup_bpfptr_noprof(__VA_ARGS__))
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static inline long strncpy_from_bpfptr(char *dst, bpfptr_t src, size_t count)
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{
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if (bpfptr_is_kernel(src))
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return strncpy_from_kernel_nofault(dst, src.kernel, count);
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return strncpy_from_user(dst, src.user, count);
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}
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#endif /* _LINUX_BPFPTR_H */
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