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 (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 */
29 static inline int
xfs_ibulk_advance(struct xfs_ibulk * breq,size_t bytes)30 xfs_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
53 typedef int (*bulkstat_one_fmt_pf)(struct xfs_ibulk *breq,
54 const struct xfs_bulkstat *bstat);
55
56 int xfs_bulkstat_one(struct xfs_ibulk *breq, bulkstat_one_fmt_pf formatter);
57 int xfs_bulkstat(struct xfs_ibulk *breq, bulkstat_one_fmt_pf formatter);
58 void xfs_bulkstat_to_bstat(struct xfs_mount *mp, struct xfs_bstat *bs1,
59 const struct xfs_bulkstat *bstat);
60
61 typedef int (*inumbers_fmt_pf)(struct xfs_ibulk *breq,
62 const struct xfs_inumbers *igrp);
63
64 int xfs_inumbers(struct xfs_ibulk *breq, inumbers_fmt_pf formatter);
65 void xfs_inumbers_to_inogrp(struct xfs_inogrp *ig1,
66 const struct xfs_inumbers *ig);
67
68 #endif /* __XFS_ITABLE_H__ */
69