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e626a13f6f
Drop bpf_iter.h header which uses vmlinux.h but re-defines a bunch of iterator structures and some of BPF constants for use in BPF iterator selftests. None of that is necessary when fresh vmlinux.h header is generated for vmlinux image that matches latest selftests. So drop ugly hacks and have a nice plain vmlinux.h usage everywhere. We could do the same with all the kfunc __ksym redefinitions, but that has dependency on very fresh pahole, so I'm not addressing that here. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20241029203919.1948941-1-andrii@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020 Facebook */
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#include <vmlinux.h>
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#include <bpf/bpf_helpers.h>
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char _license[] SEC("license") = "GPL";
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/* Copied from mm.h */
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#define VM_READ 0x00000001
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#define VM_WRITE 0x00000002
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#define VM_EXEC 0x00000004
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#define VM_MAYSHARE 0x00000080
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/* Copied from kdev_t.h */
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#define MINORBITS 20
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#define MINORMASK ((1U << MINORBITS) - 1)
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#define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS))
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#define MINOR(dev) ((unsigned int) ((dev) & MINORMASK))
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#define D_PATH_BUF_SIZE 1024
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char d_path_buf[D_PATH_BUF_SIZE] = {};
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__u32 pid = 0;
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__u32 one_task = 0;
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__u32 one_task_error = 0;
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SEC("iter/task_vma") int proc_maps(struct bpf_iter__task_vma *ctx)
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{
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struct vm_area_struct *vma = ctx->vma;
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struct seq_file *seq = ctx->meta->seq;
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struct task_struct *task = ctx->task;
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struct file *file;
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char perm_str[] = "----";
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if (task == (void *)0 || vma == (void *)0)
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return 0;
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file = vma->vm_file;
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if (task->tgid != (pid_t)pid) {
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if (one_task)
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one_task_error = 1;
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return 0;
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}
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perm_str[0] = (vma->vm_flags & VM_READ) ? 'r' : '-';
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perm_str[1] = (vma->vm_flags & VM_WRITE) ? 'w' : '-';
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perm_str[2] = (vma->vm_flags & VM_EXEC) ? 'x' : '-';
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perm_str[3] = (vma->vm_flags & VM_MAYSHARE) ? 's' : 'p';
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BPF_SEQ_PRINTF(seq, "%08llx-%08llx %s ", vma->vm_start, vma->vm_end, perm_str);
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if (file) {
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__u32 dev = file->f_inode->i_sb->s_dev;
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bpf_d_path(&file->f_path, d_path_buf, D_PATH_BUF_SIZE);
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BPF_SEQ_PRINTF(seq, "%08llx ", vma->vm_pgoff << 12);
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BPF_SEQ_PRINTF(seq, "%02x:%02x %u", MAJOR(dev), MINOR(dev),
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file->f_inode->i_ino);
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BPF_SEQ_PRINTF(seq, "\t%s\n", d_path_buf);
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} else {
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BPF_SEQ_PRINTF(seq, "%08llx 00:00 0\n", 0ULL);
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}
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return 0;
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}
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