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56 lines
2.0 KiB
56 lines
2.0 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (C) 2017 Oracle. All Rights Reserved. |
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* |
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* Author: Darrick J. Wong <[email protected]> |
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*/ |
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#ifndef __EXT4_FSMAP_H__ |
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#define __EXT4_FSMAP_H__ |
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struct fsmap; |
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/* internal fsmap representation */ |
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struct ext4_fsmap { |
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struct list_head fmr_list; |
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dev_t fmr_device; /* device id */ |
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uint32_t fmr_flags; /* mapping flags */ |
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uint64_t fmr_physical; /* device offset of segment */ |
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uint64_t fmr_owner; /* owner id */ |
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uint64_t fmr_length; /* length of segment, blocks */ |
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}; |
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struct ext4_fsmap_head { |
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uint32_t fmh_iflags; /* control flags */ |
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uint32_t fmh_oflags; /* output flags */ |
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unsigned int fmh_count; /* # of entries in array incl. input */ |
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unsigned int fmh_entries; /* # of entries filled in (output). */ |
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struct ext4_fsmap fmh_keys[2]; /* low and high keys */ |
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}; |
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void ext4_fsmap_from_internal(struct super_block *sb, struct fsmap *dest, |
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struct ext4_fsmap *src); |
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void ext4_fsmap_to_internal(struct super_block *sb, struct ext4_fsmap *dest, |
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struct fsmap *src); |
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/* fsmap to userspace formatter - copy to user & advance pointer */ |
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typedef int (*ext4_fsmap_format_t)(struct ext4_fsmap *, void *); |
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int ext4_getfsmap(struct super_block *sb, struct ext4_fsmap_head *head, |
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ext4_fsmap_format_t formatter, void *arg); |
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#define EXT4_QUERY_RANGE_ABORT 1 |
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#define EXT4_QUERY_RANGE_CONTINUE 0 |
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/* fmr_owner special values for FS_IOC_GETFSMAP; some share w/ XFS */ |
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#define EXT4_FMR_OWN_FREE FMR_OWN_FREE /* free space */ |
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#define EXT4_FMR_OWN_UNKNOWN FMR_OWN_UNKNOWN /* unknown owner */ |
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#define EXT4_FMR_OWN_FS FMR_OWNER('X', 1) /* static fs metadata */ |
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#define EXT4_FMR_OWN_LOG FMR_OWNER('X', 2) /* journalling log */ |
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#define EXT4_FMR_OWN_INODES FMR_OWNER('X', 5) /* inodes */ |
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#define EXT4_FMR_OWN_GDT FMR_OWNER('f', 1) /* group descriptors */ |
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#define EXT4_FMR_OWN_RESV_GDT FMR_OWNER('f', 2) /* reserved gdt blocks */ |
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#define EXT4_FMR_OWN_BLKBM FMR_OWNER('f', 3) /* inode bitmap */ |
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#define EXT4_FMR_OWN_INOBM FMR_OWNER('f', 4) /* block bitmap */ |
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#endif /* __EXT4_FSMAP_H__ */
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