| Darrick J. Wong | 0c9ec4b | 2017-04-30 00:36:53 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 Oracle. All Rights Reserved. |
| 3 | * |
| 4 | * Author: Darrick J. Wong <darrick.wong@oracle.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version 2 |
| 9 | * of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it would be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write the Free Software Foundation, |
| 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. |
| 19 | */ |
| 20 | #ifndef __EXT4_FSMAP_H__ |
| 21 | #define __EXT4_FSMAP_H__ |
| 22 | |
| 23 | struct fsmap; |
| 24 | |
| 25 | /* internal fsmap representation */ |
| 26 | struct ext4_fsmap { |
| 27 | struct list_head fmr_list; |
| 28 | dev_t fmr_device; /* device id */ |
| 29 | uint32_t fmr_flags; /* mapping flags */ |
| 30 | uint64_t fmr_physical; /* device offset of segment */ |
| 31 | uint64_t fmr_owner; /* owner id */ |
| 32 | uint64_t fmr_length; /* length of segment, blocks */ |
| 33 | }; |
| 34 | |
| 35 | struct ext4_fsmap_head { |
| 36 | uint32_t fmh_iflags; /* control flags */ |
| 37 | uint32_t fmh_oflags; /* output flags */ |
| 38 | unsigned int fmh_count; /* # of entries in array incl. input */ |
| 39 | unsigned int fmh_entries; /* # of entries filled in (output). */ |
| 40 | |
| 41 | struct ext4_fsmap fmh_keys[2]; /* low and high keys */ |
| 42 | }; |
| 43 | |
| 44 | void ext4_fsmap_from_internal(struct super_block *sb, struct fsmap *dest, |
| 45 | struct ext4_fsmap *src); |
| 46 | void ext4_fsmap_to_internal(struct super_block *sb, struct ext4_fsmap *dest, |
| 47 | struct fsmap *src); |
| 48 | |
| 49 | /* fsmap to userspace formatter - copy to user & advance pointer */ |
| 50 | typedef int (*ext4_fsmap_format_t)(struct ext4_fsmap *, void *); |
| 51 | |
| 52 | int ext4_getfsmap(struct super_block *sb, struct ext4_fsmap_head *head, |
| 53 | ext4_fsmap_format_t formatter, void *arg); |
| 54 | |
| 55 | #define EXT4_QUERY_RANGE_ABORT 1 |
| 56 | #define EXT4_QUERY_RANGE_CONTINUE 0 |
| 57 | |
| 58 | /* fmr_owner special values for FS_IOC_GETFSMAP; some share w/ XFS */ |
| 59 | #define EXT4_FMR_OWN_FREE FMR_OWN_FREE /* free space */ |
| 60 | #define EXT4_FMR_OWN_UNKNOWN FMR_OWN_UNKNOWN /* unknown owner */ |
| 61 | #define EXT4_FMR_OWN_FS FMR_OWNER('X', 1) /* static fs metadata */ |
| 62 | #define EXT4_FMR_OWN_LOG FMR_OWNER('X', 2) /* journalling log */ |
| 63 | #define EXT4_FMR_OWN_INODES FMR_OWNER('X', 5) /* inodes */ |
| 64 | #define EXT4_FMR_OWN_GDT FMR_OWNER('f', 1) /* group descriptors */ |
| 65 | #define EXT4_FMR_OWN_RESV_GDT FMR_OWNER('f', 2) /* reserved gdt blocks */ |
| 66 | #define EXT4_FMR_OWN_BLKBM FMR_OWNER('f', 3) /* inode bitmap */ |
| 67 | #define EXT4_FMR_OWN_INOBM FMR_OWNER('f', 4) /* block bitmap */ |
| 68 | |
| 69 | #endif /* __EXT4_FSMAP_H__ */ |