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e7ee96dfb8
Use -ECANCELED to signal "stop iterating" instead of these magical *_ITER_ABORT values, since it's duplicative. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
64 lines
2 KiB
C
64 lines
2 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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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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