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f736d93d76
Enable idmapped mounts for xfs. This basically just means passing down the user_namespace argument from the VFS methods down to where it is passed to the relevant helpers. Note that full-filesystem bulkstat is not supported from inside idmapped mounts as it is an administrative operation that acts on the whole file system. The limitation is not applied to the bulkstat single operation that just operates on a single inode. Link: https://lore.kernel.org/r/20210121131959.646623-40-christian.brauner@ubuntu.com Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved.
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*/
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#ifndef __XFS_ITABLE_H__
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#define __XFS_ITABLE_H__
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/* In-memory representation of a userspace request for batch inode data. */
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struct xfs_ibulk {
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struct xfs_mount *mp;
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struct user_namespace *mnt_userns;
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void __user *ubuffer; /* user output buffer */
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xfs_ino_t startino; /* start with this inode */
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unsigned int icount; /* number of elements in ubuffer */
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unsigned int ocount; /* number of records returned */
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unsigned int flags; /* see XFS_IBULK_FLAG_* */
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};
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/* Only iterate within the same AG as startino */
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#define XFS_IBULK_SAME_AG (XFS_IWALK_SAME_AG)
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/*
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* Advance the user buffer pointer by one record of the given size. If the
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* buffer is now full, return the appropriate error code.
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*/
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static inline int
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xfs_ibulk_advance(
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struct xfs_ibulk *breq,
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size_t bytes)
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{
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char __user *b = breq->ubuffer;
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breq->ubuffer = b + bytes;
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breq->ocount++;
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return breq->ocount == breq->icount ? -ECANCELED : 0;
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}
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/*
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* Return stat information in bulk (by-inode) for the filesystem.
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*/
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/*
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* Return codes for the formatter function are 0 to continue iterating, and
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* non-zero to stop iterating. Any non-zero value will be passed up to the
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* bulkstat/inumbers caller. The special value -ECANCELED can be used to stop
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* iteration, as neither bulkstat nor inumbers will ever generate that error
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* code on their own.
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*/
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typedef int (*bulkstat_one_fmt_pf)(struct xfs_ibulk *breq,
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const struct xfs_bulkstat *bstat);
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int xfs_bulkstat_one(struct xfs_ibulk *breq, bulkstat_one_fmt_pf formatter);
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int xfs_bulkstat(struct xfs_ibulk *breq, bulkstat_one_fmt_pf formatter);
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void xfs_bulkstat_to_bstat(struct xfs_mount *mp, struct xfs_bstat *bs1,
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const struct xfs_bulkstat *bstat);
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typedef int (*inumbers_fmt_pf)(struct xfs_ibulk *breq,
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const struct xfs_inumbers *igrp);
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int xfs_inumbers(struct xfs_ibulk *breq, inumbers_fmt_pf formatter);
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void xfs_inumbers_to_inogrp(struct xfs_inogrp *ig1,
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const struct xfs_inumbers *ig);
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#endif /* __XFS_ITABLE_H__ */
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