Ping again.

Eric, could you take a look at this patch and ack it if it is okay?

Thanks!


On 10/22/19 8:05 PM, Yonghong Song wrote:

Hi, Eric,

Could you take a look at this patch the series as well?
If it looks good, could you ack the patch #1?

Thanks!

On 10/22/19 12:17 PM, Carlos Neira wrote:

quoted

ns_match returns true if the namespace inode and dev_t matches the ones
provided by the caller.

Signed-off-by: Carlos Neira <redacted>
---
   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 a0431642c6b5..ef59cf347285 100644
--- a/fs/nsfs.c
+++ b/fs/nsfs.c

@@ -245,6 +245,20 @@ 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 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);