Dave Chinner | 0b61f8a | 2018-06-05 19:42:14 -0700 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | */ |
| 5 | #ifndef __XFS_ITABLE_H__ |
| 6 | #define __XFS_ITABLE_H__ |
| 7 | |
Darrick J. Wong | 2810bd6 | 2019-07-02 09:39:40 -0700 | [diff] [blame] | 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 */ |
Darrick J. Wong | 13d59a2 | 2019-07-03 20:36:28 -0700 | [diff] [blame] | 15 | unsigned int flags; /* see XFS_IBULK_FLAG_* */ |
Darrick J. Wong | 2810bd6 | 2019-07-02 09:39:40 -0700 | [diff] [blame] | 16 | }; |
| 17 | |
Darrick J. Wong | 13d59a2 | 2019-07-03 20:36:28 -0700 | [diff] [blame] | 18 | /* Only iterate within the same AG as startino */ |
| 19 | #define XFS_IBULK_SAME_AG (XFS_IWALK_SAME_AG) |
| 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | /* |
Darrick J. Wong | 2810bd6 | 2019-07-02 09:39:40 -0700 | [diff] [blame] | 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. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | */ |
Darrick J. Wong | 2810bd6 | 2019-07-02 09:39:40 -0700 | [diff] [blame] | 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++; |
Darrick J. Wong | e7ee96d | 2019-08-28 14:37:57 -0700 | [diff] [blame] | 34 | return breq->ocount == breq->icount ? -ECANCELED : 0; |
Darrick J. Wong | 2810bd6 | 2019-07-02 09:39:40 -0700 | [diff] [blame] | 35 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | * Return stat information in bulk (by-inode) for the filesystem. |
| 39 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
Darrick J. Wong | e7ee96d | 2019-08-28 14:37:57 -0700 | [diff] [blame] | 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 | |
Darrick J. Wong | 2810bd6 | 2019-07-02 09:39:40 -0700 | [diff] [blame] | 49 | typedef int (*bulkstat_one_fmt_pf)(struct xfs_ibulk *breq, |
Darrick J. Wong | 7035f97 | 2019-07-03 20:36:26 -0700 | [diff] [blame] | 50 | const struct xfs_bulkstat *bstat); |
Michal Marek | faa63e9 | 2007-07-11 11:10:19 +1000 | [diff] [blame] | 51 | |
Darrick J. Wong | 2810bd6 | 2019-07-02 09:39:40 -0700 | [diff] [blame] | 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); |
Darrick J. Wong | 7035f97 | 2019-07-03 20:36:26 -0700 | [diff] [blame] | 54 | void xfs_bulkstat_to_bstat(struct xfs_mount *mp, struct xfs_bstat *bs1, |
| 55 | const struct xfs_bulkstat *bstat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
Darrick J. Wong | 677717f | 2019-07-02 09:39:43 -0700 | [diff] [blame] | 57 | typedef int (*inumbers_fmt_pf)(struct xfs_ibulk *breq, |
Darrick J. Wong | 5f19c7f | 2019-07-03 20:36:27 -0700 | [diff] [blame] | 58 | const struct xfs_inumbers *igrp); |
Michal Marek | faa63e9 | 2007-07-11 11:10:19 +1000 | [diff] [blame] | 59 | |
Darrick J. Wong | 677717f | 2019-07-02 09:39:43 -0700 | [diff] [blame] | 60 | int xfs_inumbers(struct xfs_ibulk *breq, inumbers_fmt_pf formatter); |
Darrick J. Wong | 5f19c7f | 2019-07-03 20:36:27 -0700 | [diff] [blame] | 61 | void xfs_inumbers_to_inogrp(struct xfs_inogrp *ig1, |
| 62 | const struct xfs_inumbers *ig); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #endif /* __XFS_ITABLE_H__ */ |