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 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 (XFS_IWALK_SAME_AG)
21
22 /*
23 * Advance the user buffer pointer by one record of the given size. If the
24 * buffer is now full, return the appropriate error code.
25 */
26 static inline int
xfs_ibulk_advance(struct xfs_ibulk * breq,size_t bytes)27 xfs_ibulk_advance(
28 struct xfs_ibulk *breq,
29 size_t bytes)
30 {
31 char __user *b = breq->ubuffer;
32
33 breq->ubuffer = b + bytes;
34 breq->ocount++;
35 return breq->ocount == breq->icount ? -ECANCELED : 0;
36 }
37
38 /*
39 * Return stat information in bulk (by-inode) for the filesystem.
40 */
41
42 /*
43 * Return codes for the formatter function are 0 to continue iterating, and
44 * non-zero to stop iterating. Any non-zero value will be passed up to the
45 * bulkstat/inumbers caller. The special value -ECANCELED can be used to stop
46 * iteration, as neither bulkstat nor inumbers will ever generate that error
47 * code on their own.
48 */
49
50 typedef int (*bulkstat_one_fmt_pf)(struct xfs_ibulk *breq,
51 const struct xfs_bulkstat *bstat);
52
53 int xfs_bulkstat_one(struct xfs_ibulk *breq, bulkstat_one_fmt_pf formatter);
54 int xfs_bulkstat(struct xfs_ibulk *breq, bulkstat_one_fmt_pf formatter);
55 void xfs_bulkstat_to_bstat(struct xfs_mount *mp, struct xfs_bstat *bs1,
56 const struct xfs_bulkstat *bstat);
57
58 typedef int (*inumbers_fmt_pf)(struct xfs_ibulk *breq,
59 const struct xfs_inumbers *igrp);
60
61 int xfs_inumbers(struct xfs_ibulk *breq, inumbers_fmt_pf formatter);
62 void xfs_inumbers_to_inogrp(struct xfs_inogrp *ig1,
63 const struct xfs_inumbers *ig);
64
65 #endif /* __XFS_ITABLE_H__ */
66