cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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xfs_itable.h (2173B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
      4 */
      5#ifndef __XFS_ITABLE_H__
      6#define	__XFS_ITABLE_H__
      7
      8/* In-memory representation of a userspace request for batch inode data. */
      9struct xfs_ibulk {
     10	struct xfs_mount	*mp;
     11	struct user_namespace   *mnt_userns;
     12	void __user		*ubuffer; /* user output buffer */
     13	xfs_ino_t		startino; /* start with this inode */
     14	unsigned int		icount;   /* number of elements in ubuffer */
     15	unsigned int		ocount;   /* number of records returned */
     16	unsigned int		flags;    /* see XFS_IBULK_FLAG_* */
     17};
     18
     19/* Only iterate within the same AG as startino */
     20#define XFS_IBULK_SAME_AG	(1U << 0)
     21
     22/* Fill out the bs_extents64 field if set. */
     23#define XFS_IBULK_NREXT64	(1U << 1)
     24
     25/*
     26 * Advance the user buffer pointer by one record of the given size.  If the
     27 * buffer is now full, return the appropriate error code.
     28 */
     29static inline int
     30xfs_ibulk_advance(
     31	struct xfs_ibulk	*breq,
     32	size_t			bytes)
     33{
     34	char __user		*b = breq->ubuffer;
     35
     36	breq->ubuffer = b + bytes;
     37	breq->ocount++;
     38	return breq->ocount == breq->icount ? -ECANCELED : 0;
     39}
     40
     41/*
     42 * Return stat information in bulk (by-inode) for the filesystem.
     43 */
     44
     45/*
     46 * Return codes for the formatter function are 0 to continue iterating, and
     47 * non-zero to stop iterating.  Any non-zero value will be passed up to the
     48 * bulkstat/inumbers caller.  The special value -ECANCELED can be used to stop
     49 * iteration, as neither bulkstat nor inumbers will ever generate that error
     50 * code on their own.
     51 */
     52
     53typedef int (*bulkstat_one_fmt_pf)(struct xfs_ibulk *breq,
     54		const struct xfs_bulkstat *bstat);
     55
     56int xfs_bulkstat_one(struct xfs_ibulk *breq, bulkstat_one_fmt_pf formatter);
     57int xfs_bulkstat(struct xfs_ibulk *breq, bulkstat_one_fmt_pf formatter);
     58void xfs_bulkstat_to_bstat(struct xfs_mount *mp, struct xfs_bstat *bs1,
     59		const struct xfs_bulkstat *bstat);
     60
     61typedef int (*inumbers_fmt_pf)(struct xfs_ibulk *breq,
     62		const struct xfs_inumbers *igrp);
     63
     64int xfs_inumbers(struct xfs_ibulk *breq, inumbers_fmt_pf formatter);
     65void xfs_inumbers_to_inogrp(struct xfs_inogrp *ig1,
     66		const struct xfs_inumbers *ig);
     67
     68#endif	/* __XFS_ITABLE_H__ */