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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /tools/testing/selftests/bpf/progs/bpf_iter_task_vma.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/bpf/progs/bpf_iter_task_vma.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/bpf_iter_task_vma.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_task_vma.c b/tools/testing/selftests/bpf/progs/bpf_iter_task_vma.c new file mode 100644 index 000000000..dd923dc63 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/bpf_iter_task_vma.c @@ -0,0 +1,62 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2020 Facebook */ +#include "bpf_iter.h" +#include <bpf/bpf_helpers.h> + +char _license[] SEC("license") = "GPL"; + +/* Copied from mm.h */ +#define VM_READ 0x00000001 +#define VM_WRITE 0x00000002 +#define VM_EXEC 0x00000004 +#define VM_MAYSHARE 0x00000080 + +/* Copied from kdev_t.h */ +#define MINORBITS 20 +#define MINORMASK ((1U << MINORBITS) - 1) +#define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS)) +#define MINOR(dev) ((unsigned int) ((dev) & MINORMASK)) + +#define D_PATH_BUF_SIZE 1024 +char d_path_buf[D_PATH_BUF_SIZE] = {}; +__u32 pid = 0; +__u32 one_task = 0; +__u32 one_task_error = 0; + +SEC("iter/task_vma") int proc_maps(struct bpf_iter__task_vma *ctx) +{ + struct vm_area_struct *vma = ctx->vma; + struct seq_file *seq = ctx->meta->seq; + struct task_struct *task = ctx->task; + struct file *file; + char perm_str[] = "----"; + + if (task == (void *)0 || vma == (void *)0) + return 0; + + file = vma->vm_file; + if (task->tgid != pid) { + if (one_task) + one_task_error = 1; + return 0; + } + perm_str[0] = (vma->vm_flags & VM_READ) ? 'r' : '-'; + perm_str[1] = (vma->vm_flags & VM_WRITE) ? 'w' : '-'; + perm_str[2] = (vma->vm_flags & VM_EXEC) ? 'x' : '-'; + perm_str[3] = (vma->vm_flags & VM_MAYSHARE) ? 's' : 'p'; + BPF_SEQ_PRINTF(seq, "%08llx-%08llx %s ", vma->vm_start, vma->vm_end, perm_str); + + if (file) { + __u32 dev = file->f_inode->i_sb->s_dev; + + bpf_d_path(&file->f_path, d_path_buf, D_PATH_BUF_SIZE); + + BPF_SEQ_PRINTF(seq, "%08llx ", vma->vm_pgoff << 12); + BPF_SEQ_PRINTF(seq, "%02x:%02x %u", MAJOR(dev), MINOR(dev), + file->f_inode->i_ino); + BPF_SEQ_PRINTF(seq, "\t%s\n", d_path_buf); + } else { + BPF_SEQ_PRINTF(seq, "%08llx 00:00 0\n", 0ULL); + } + return 0; +} |