From: Hengqi Chen <hengqi.chen@gmail.com>
To: bpf@vger.kernel.org
Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
yhs@fb.com, john.fastabend@gmail.com, jolsa@kernel.org,
hengqi.chen@gmail.com
Subject: [PATCH bpf-next v2] bpf: expose bpf_d_path helper to vfs_* and security_* functions
Date: Mon, 19 Jul 2021 23:17:53 +0800 [thread overview]
Message-ID: <20210719151753.399227-1-hengqi.chen@gmail.com> (raw)
Add vfs_* and security_* to bpf_d_path allowlist, so that we can use
bpf_d_path helper to extract full file path from these functions'
`struct path *` and `struct file *` arguments. This will help tools
like IOVisor's filetop[2]/filelife to get full file path.
Changes since v1: [1]
- Alexei and Yonghong suggested that bpf_d_path helper could also
apply to vfs_* and security_file_* kernel functions. Added them.
[1] https://lore.kernel.org/bpf/20210712162424.2034006-1-hengqi.chen@gmail.com/
[2] https://github.com/iovisor/bcc/issues/3527
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
---
kernel/trace/bpf_trace.c | 50 ++++++++++++++++++++++++++++++++++++++--
1 file changed, 48 insertions(+), 2 deletions(-)
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 08906007306d..c784f3c7143f 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -850,16 +850,62 @@ BPF_CALL_3(bpf_d_path, struct path *, path, char *, buf, u32, sz)
BTF_SET_START(btf_allowlist_d_path)
#ifdef CONFIG_SECURITY
BTF_ID(func, security_file_permission)
-BTF_ID(func, security_inode_getattr)
BTF_ID(func, security_file_open)
+BTF_ID(func, security_file_ioctl)
+BTF_ID(func, security_file_free)
+BTF_ID(func, security_file_alloc)
+BTF_ID(func, security_file_lock)
+BTF_ID(func, security_file_fcntl)
+BTF_ID(func, security_file_set_fowner)
+BTF_ID(func, security_file_receive)
+BTF_ID(func, security_inode_getattr)
#endif
#ifdef CONFIG_SECURITY_PATH
BTF_ID(func, security_path_truncate)
+BTF_ID(func, security_path_notify)
+BTF_ID(func, security_path_unlink)
+BTF_ID(func, security_path_mkdir)
+BTF_ID(func, security_path_rmdir)
+BTF_ID(func, security_path_mknod)
+BTF_ID(func, security_path_symlink)
+BTF_ID(func, security_path_link)
+BTF_ID(func, security_path_rename)
+BTF_ID(func, security_path_chmod)
+BTF_ID(func, security_path_chown)
+BTF_ID(func, security_path_chroot)
#endif
BTF_ID(func, vfs_truncate)
BTF_ID(func, vfs_fallocate)
-BTF_ID(func, dentry_open)
BTF_ID(func, vfs_getattr)
+BTF_ID(func, vfs_fadvise)
+BTF_ID(func, vfs_fchmod)
+BTF_ID(func, vfs_fchown)
+BTF_ID(func, vfs_open)
+BTF_ID(func, vfs_setpos)
+BTF_ID(func, vfs_llseek)
+BTF_ID(func, vfs_read)
+BTF_ID(func, vfs_write)
+BTF_ID(func, vfs_iocb_iter_read)
+BTF_ID(func, vfs_iter_read)
+BTF_ID(func, vfs_readv)
+BTF_ID(func, vfs_iocb_iter_write)
+BTF_ID(func, vfs_iter_write)
+BTF_ID(func, vfs_writev)
+BTF_ID(func, vfs_copy_file_range)
+BTF_ID(func, vfs_getattr_nosec)
+BTF_ID(func, vfs_ioctl)
+BTF_ID(func, vfs_fsync_range)
+BTF_ID(func, vfs_fsync)
+BTF_ID(func, vfs_utimes)
+BTF_ID(func, vfs_statfs)
+BTF_ID(func, vfs_dedupe_file_range_one)
+BTF_ID(func, vfs_dedupe_file_range)
+BTF_ID(func, vfs_clone_file_range)
+BTF_ID(func, vfs_cancel_lock)
+BTF_ID(func, vfs_test_lock)
+BTF_ID(func, vfs_setlease)
+BTF_ID(func, vfs_lock_file)
+BTF_ID(func, dentry_open)
BTF_ID(func, filp_close)
BTF_SET_END(btf_allowlist_d_path)
--
2.25.1
next reply other threads:[~2021-07-19 15:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-19 15:17 Hengqi Chen [this message]
2021-07-19 19:02 ` [PATCH bpf-next v2] bpf: expose bpf_d_path helper to vfs_* and security_* functions Andrii Nakryiko
2021-07-22 5:01 ` Hengqi Chen
2021-07-23 0:14 ` Andrii Nakryiko
2021-07-22 10:15 ` Yaniv Agman
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