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authorCarlos Neira <cneirabustos@gmail.com>2020-03-04 23:41:55 +0300
committerAlexei Starovoitov <ast@kernel.org>2020-03-13 03:33:11 +0300
commit1e2328e762548c7d17b7ba8ded9f409d05710dd1 (patch)
tree6972c2aa0e86e3fb3590e3fe24c45db5f2d83928 /fs/nsfs.c
parent132c1af0a23d049e2ec93eb6a180d9de71d3a32f (diff)
downloadlinux-1e2328e762548c7d17b7ba8ded9f409d05710dd1.tar.xz
fs/nsfs.c: Added ns_match
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> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200304204157.58695-2-cneirabustos@gmail.com
Diffstat (limited to 'fs/nsfs.c')
-rw-r--r--fs/nsfs.c14
1 files changed, 14 insertions, 0 deletions
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 @@ out_invalid:
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);