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 v17 1/3] fs/nsfs.c: added ns_match
Date: Wed, 4 Mar 2020 17:41:55 -0300 [thread overview]
Message-ID: <20200304204157.58695-2-cneirabustos@gmail.com> (raw)
In-Reply-To: <20200304204157.58695-1-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 | 14 ++++++++++++++
include/linux/proc_ns.h | 2 ++
2 files changed, 16 insertions(+)
diff --git a/fs/nsfs.c b/fs/nsfs.c
index b13bfd406820..4f1205725cfe 100644
--- a/fs/nsfs.c
+++ b/fs/nsfs.c
@@ -247,6 +247,20 @@ struct file *proc_ns_fget(int fd)
return ERR_PTR(-EINVAL);
}
+/**
+ * ns_match() - Returns true if current namespace matches dev/ino provided.
+ * @ns_common: current ns
+ * @dev: dev_t from nsfs that will be matched against current nsfs
+ * @ino: ino_t from nsfs that will be matched against current nsfs
+ *
+ * Return: true if dev and ino matches the current nsfs.
+ */
+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 4626b1ac3b6c..adff08bfecf9 100644
--- a/include/linux/proc_ns.h
+++ b/include/linux/proc_ns.h
@@ -85,6 +85,8 @@ typedef struct ns_common *ns_get_path_helper_t(void *);
extern int 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:[~2020-03-04 20:42 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-04 20:41 [PATCH v17 0/3] BPF: New helper to obtain namespace data from current task Carlos Neira
2020-03-04 20:41 ` Carlos Neira [this message]
2020-03-04 20:41 ` [PATCH v17 2/3] bpf: added new helper bpf_get_ns_current_pid_tgid Carlos Neira
2020-03-04 20:41 ` [PATCH v17 3/3] tools/testing/selftests/bpf: Add self-tests for " Carlos Neira
2020-03-13 0:45 ` [PATCH v17 0/3] BPF: New helper to obtain namespace data from current task Alexei Starovoitov
2020-03-13 10:39 ` Quentin Monnet
2020-03-13 12:48 ` Carlos Antonio Neira Bustos
2020-03-13 12:46 ` Carlos Antonio Neira Bustos
2020-04-28 1:40 ` Andrii Nakryiko
[not found] ` <CACiB22iSFBybiAn_Z0cspWFLObZy30ZoQHnvH4kFdVsB9dinvQ@mail.gmail.com>
2020-04-28 1:47 ` Andrii Nakryiko
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