From: Carlos Neira <cneirabustos@gmail.com>
To: netdev@vger.kernel.org
Cc: yhs@fb.com, ebiederm@xmission.com, brouer@redhat.com,
bpf@vger.kernel.org, cneirabustos@gmail.com
Subject: [PATCH v13 1/4] fs/nsfs.c: added ns_match
Date: Wed, 9 Oct 2019 12:26:29 -0300 [thread overview]
Message-ID: <20191009152632.14218-2-cneirabustos@gmail.com> (raw)
In-Reply-To: <20191009152632.14218-1-cneirabustos@gmail.com>
ns_match returns true if the namespace inode and dev_t matches the ones
provided by the caller.
Signed-off-by: Carlos Neira <cneirabustos@gmail.com>
---
fs/nsfs.c | 8 ++++++++
include/linux/proc_ns.h | 2 ++
2 files changed, 10 insertions(+)
diff --git a/fs/nsfs.c b/fs/nsfs.c
index a0431642c6b5..256f6295d33d 100644
--- a/fs/nsfs.c
+++ b/fs/nsfs.c
@@ -245,6 +245,14 @@ struct file *proc_ns_fget(int fd)
return ERR_PTR(-EINVAL);
}
+/* Returns true if current namespace matches dev/ino.
+ */
+bool ns_match(const struct ns_common *ns, dev_t dev, ino_t ino)
+{
+ return ((ns->inum == ino) && (nsfs_mnt->mnt_sb->s_dev == dev));
+}
+
+
static int nsfs_show_path(struct seq_file *seq, struct dentry *dentry)
{
struct inode *inode = d_inode(dentry);
diff --git a/include/linux/proc_ns.h b/include/linux/proc_ns.h
index d31cb6215905..1da9f33489f3 100644
--- a/include/linux/proc_ns.h
+++ b/include/linux/proc_ns.h
@@ -82,6 +82,8 @@ typedef struct ns_common *ns_get_path_helper_t(void *);
extern void *ns_get_path_cb(struct path *path, ns_get_path_helper_t ns_get_cb,
void *private_data);
+extern bool ns_match(const struct ns_common *ns, dev_t dev, ino_t ino);
+
extern int ns_get_name(char *buf, size_t size, struct task_struct *task,
const struct proc_ns_operations *ns_ops);
extern void nsfs_init(void);
--
2.20.1
next prev parent reply other threads:[~2019-10-09 15:26 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-09 15:26 [PATCH v13 0/4] BPF: New helper to obtain namespace data from current task Carlos Neira
2019-10-09 15:26 ` Carlos Neira [this message]
2019-10-09 15:26 ` [PATCH v13 2/4] bpf: added new helper bpf_get_ns_current_pid_tgid Carlos Neira
2019-10-09 16:14 ` Andrii Nakryiko
2019-10-09 17:45 ` Carlos Antonio Neira Bustos
2019-10-09 19:50 ` Andrii Nakryiko
2019-10-09 20:30 ` Carlos Antonio Neira Bustos
2019-10-09 15:26 ` [PATCH v13 3/4] tools: Added bpf_get_ns_current_pid_tgid helper Carlos Neira
2019-10-09 15:26 ` [PATCH v13 4/4] tools/testing/selftests/bpf: Add self-tests for new helper Carlos Neira
2019-10-09 16:26 ` Andrii Nakryiko
2019-10-09 16:44 ` Carlos Antonio Neira Bustos
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