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authorChristian Brauner <christian.brauner@ubuntu.com>2021-01-21 16:19:43 +0300
committerChristian Brauner <christian.brauner@ubuntu.com>2021-01-24 16:27:20 +0300
commit549c7297717c32ee53f156cd949e055e601f67bb (patch)
treed096bc02f780bdee69a701952d5568f4be9972c1 /fs/autofs/root.c
parent1ab29965b30599c797266eb3b970b4e6c8de3672 (diff)
downloadlinux-549c7297717c32ee53f156cd949e055e601f67bb.tar.xz
fs: make helpers idmap mount aware
Extend some inode methods with an additional user namespace argument. A filesystem that is aware of idmapped mounts will receive the user namespace the mount has been marked with. This can be used for additional permission checking and also to enable filesystems to translate between uids and gids if they need to. We have implemented all relevant helpers in earlier patches. As requested we simply extend the exisiting inode method instead of introducing new ones. This is a little more code churn but it's mostly mechanical and doesnt't leave us with additional inode methods. Link: https://lore.kernel.org/r/20210121131959.646623-25-christian.brauner@ubuntu.com Cc: Christoph Hellwig <hch@lst.de> Cc: David Howells <dhowells@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: linux-fsdevel@vger.kernel.org Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Diffstat (limited to 'fs/autofs/root.c')
-rw-r--r--fs/autofs/root.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/fs/autofs/root.c b/fs/autofs/root.c
index 5aaa1732bf1e..91fe4548c256 100644
--- a/fs/autofs/root.c
+++ b/fs/autofs/root.c
@@ -10,10 +10,12 @@
#include "autofs_i.h"
-static int autofs_dir_symlink(struct inode *, struct dentry *, const char *);
+static int autofs_dir_symlink(struct user_namespace *, struct inode *,
+ struct dentry *, const char *);
static int autofs_dir_unlink(struct inode *, struct dentry *);
static int autofs_dir_rmdir(struct inode *, struct dentry *);
-static int autofs_dir_mkdir(struct inode *, struct dentry *, umode_t);
+static int autofs_dir_mkdir(struct user_namespace *, struct inode *,
+ struct dentry *, umode_t);
static long autofs_root_ioctl(struct file *, unsigned int, unsigned long);
#ifdef CONFIG_COMPAT
static long autofs_root_compat_ioctl(struct file *,
@@ -524,9 +526,9 @@ static struct dentry *autofs_lookup(struct inode *dir,
return NULL;
}
-static int autofs_dir_symlink(struct inode *dir,
- struct dentry *dentry,
- const char *symname)
+static int autofs_dir_symlink(struct user_namespace *mnt_userns,
+ struct inode *dir, struct dentry *dentry,
+ const char *symname)
{
struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
struct autofs_info *ino = autofs_dentry_ino(dentry);
@@ -715,8 +717,9 @@ static int autofs_dir_rmdir(struct inode *dir, struct dentry *dentry)
return 0;
}
-static int autofs_dir_mkdir(struct inode *dir,
- struct dentry *dentry, umode_t mode)
+static int autofs_dir_mkdir(struct user_namespace *mnt_userns,
+ struct inode *dir, struct dentry *dentry,
+ umode_t mode)
{
struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
struct autofs_info *ino = autofs_dentry_ino(dentry);