[PATCH v2 24/39] notify: handle idmapped mounts

Enable notify implementations to handle idmapped mounts by passing down the mount's user namespace. Cc: Christoph Hellwig <hch(a)lst.de&gt; Cc: David Howells <dhowells(a)redhat.com&gt; Cc: Al Viro <viro(a)zeniv.linux.org.uk&gt; Cc: linux-fsdevel(a)vger.kernel.org Signed-off-by: Christian Brauner <christian.brauner(a)ubuntu.com&gt; --- /* v2 */ patch introduced --- fs/notify/fanotify/fanotify_user.c | 2 +- fs/notify/inotify/inotify_user.c | 3 ++- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index de4d01bb1d8d..e3b2cb6a9d81 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -702,7 +702,7 @@ static int fanotify_find_path(int dfd, const char __user *filename, } /* you can only watch an inode if you have read permissions on it */ - ret = inode_permission(&init_user_ns, path->dentry->d_inode, MAY_READ); + ret = inode_permission(mnt_user_ns(path->mnt), path->dentry->d_inode, MAY_READ); if (ret) { path_put(path); goto out; diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c index e995fd4e4e53..f39f5b81f2b3 100644 --- a/fs/notify/inotify/inotify_user.c +++ b/fs/notify/inotify/inotify_user.c @@ -31,6 +31,7 @@ #include <linux/wait.h> #include <linux/memcontrol.h> #include <linux/security.h> +#include <linux/mount.h> #include "inotify.h" #include "../fdinfo.h" @@ -343,7 +344,7 @@ static int inotify_find_inode(const char __user *dirname, struct path *path, if (error) return error; /* you can only watch an inode if you have read permissions on it */ - error = inode_permission(&init_user_ns, path->dentry->d_inode, MAY_READ); + error = inode_permission(mnt_user_ns(path->mnt), path->dentry->d_inode, MAY_READ); if (error) { path_put(path); return error; -- 2.29.2