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https://github.com/torvalds/linux
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4609e1f18e
Convert to struct mnt_idmap.
Last cycle we merged the necessary infrastructure in
256c8aed2b ("fs: introduce dedicated idmap type for mounts").
This is just the conversion to struct mnt_idmap.
Currently we still pass around the plain namespace that was attached to a
mount. This is in general pretty convenient but it makes it easy to
conflate namespaces that are relevant on the filesystem with namespaces
that are relevent on the mount level. Especially for non-vfs developers
without detailed knowledge in this area this can be a potential source for
bugs.
Once the conversion to struct mnt_idmap is done all helpers down to the
really low-level helpers will take a struct mnt_idmap argument instead of
two namespace arguments. This way it becomes impossible to conflate the two
eliminating the possibility of any bugs. All of the vfs and all filesystems
only operate on struct mnt_idmap.
Acked-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
22 lines
573 B
C
22 lines
573 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 mnt_idmap *idmap,
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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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