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authorChristian Brauner <christian.brauner@ubuntu.com>2021-01-21 14:19:43 +0100
committerChristian Brauner <christian.brauner@ubuntu.com>2021-01-24 14:27:20 +0100
commit549c7297717c32ee53f156cd949e055e601f67bb (patch)
treed096bc02f780bdee69a701952d5568f4be9972c1 /fs/overlayfs/dir.c
parent1ab29965b30599c797266eb3b970b4e6c8de3672 (diff)
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/overlayfs/dir.c')
-rw-r--r--fs/overlayfs/dir.c21
1 files changed, 11 insertions, 10 deletions
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 6904cc2ed7bb..8b3be7342a8c 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -650,19 +650,20 @@ out:
return err;
}
-static int ovl_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- bool excl)
+static int ovl_create(struct user_namespace *mnt_userns, struct inode *dir,
+ struct dentry *dentry, umode_t mode, bool excl)
{
return ovl_create_object(dentry, (mode & 07777) | S_IFREG, 0, NULL);
}
-static int ovl_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+static int ovl_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
+ struct dentry *dentry, umode_t mode)
{
return ovl_create_object(dentry, (mode & 07777) | S_IFDIR, 0, NULL);
}
-static int ovl_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
- dev_t rdev)
+static int ovl_mknod(struct user_namespace *mnt_userns, struct inode *dir,
+ struct dentry *dentry, umode_t mode, dev_t rdev)
{
/* Don't allow creation of "whiteout" on overlay */
if (S_ISCHR(mode) && rdev == WHITEOUT_DEV)
@@ -671,8 +672,8 @@ static int ovl_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
return ovl_create_object(dentry, mode, rdev, NULL);
}
-static int ovl_symlink(struct inode *dir, struct dentry *dentry,
- const char *link)
+static int ovl_symlink(struct user_namespace *mnt_userns, struct inode *dir,
+ struct dentry *dentry, const char *link)
{
return ovl_create_object(dentry, S_IFLNK, 0, link);
}
@@ -1069,9 +1070,9 @@ static int ovl_set_redirect(struct dentry *dentry, bool samedir)
return err;
}
-static int ovl_rename(struct inode *olddir, struct dentry *old,
- struct inode *newdir, struct dentry *new,
- unsigned int flags)
+static int ovl_rename(struct user_namespace *mnt_userns, struct inode *olddir,
+ struct dentry *old, struct inode *newdir,
+ struct dentry *new, unsigned int flags)
{
int err;
struct dentry *old_upperdir;