fs/xfs/xfs_itable.h

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