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549c729771
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>
21 lines
583 B
C
21 lines
583 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PROCFS_FD_H__
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#define __PROCFS_FD_H__
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#include <linux/fs.h>
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extern const struct file_operations proc_fd_operations;
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extern const struct inode_operations proc_fd_inode_operations;
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extern const struct file_operations proc_fdinfo_operations;
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extern const struct inode_operations proc_fdinfo_inode_operations;
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extern int proc_fd_permission(struct user_namespace *mnt_userns,
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struct inode *inode, int mask);
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static inline unsigned int proc_fd(struct inode *inode)
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{
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return PROC_I(inode)->fd;
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}
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#endif /* __PROCFS_FD_H__ */
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