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102 lines
3.5 KiB
102 lines
3.5 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* attrib.h - Defines for attribute handling in NTFS Linux kernel driver. |
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* Part of the Linux-NTFS project. |
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* |
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* Copyright (c) 2001-2005 Anton Altaparmakov |
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* Copyright (c) 2002 Richard Russon |
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*/ |
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#ifndef _LINUX_NTFS_ATTRIB_H |
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#define _LINUX_NTFS_ATTRIB_H |
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#include "endian.h" |
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#include "types.h" |
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#include "layout.h" |
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#include "inode.h" |
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#include "runlist.h" |
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#include "volume.h" |
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/** |
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* ntfs_attr_search_ctx - used in attribute search functions |
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* @mrec: buffer containing mft record to search |
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* @attr: attribute record in @mrec where to begin/continue search |
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* @is_first: if true ntfs_attr_lookup() begins search with @attr, else after |
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* |
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* Structure must be initialized to zero before the first call to one of the |
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* attribute search functions. Initialize @mrec to point to the mft record to |
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* search, and @attr to point to the first attribute within @mrec (not necessary |
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* if calling the _first() functions), and set @is_first to 'true' (not necessary |
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* if calling the _first() functions). |
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* |
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* If @is_first is 'true', the search begins with @attr. If @is_first is 'false', |
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* the search begins after @attr. This is so that, after the first call to one |
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* of the search attribute functions, we can call the function again, without |
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* any modification of the search context, to automagically get the next |
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* matching attribute. |
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*/ |
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typedef struct { |
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MFT_RECORD *mrec; |
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ATTR_RECORD *attr; |
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bool is_first; |
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ntfs_inode *ntfs_ino; |
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ATTR_LIST_ENTRY *al_entry; |
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ntfs_inode *base_ntfs_ino; |
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MFT_RECORD *base_mrec; |
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ATTR_RECORD *base_attr; |
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} ntfs_attr_search_ctx; |
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extern int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn, |
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ntfs_attr_search_ctx *ctx); |
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extern int ntfs_map_runlist(ntfs_inode *ni, VCN vcn); |
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extern LCN ntfs_attr_vcn_to_lcn_nolock(ntfs_inode *ni, const VCN vcn, |
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const bool write_locked); |
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extern runlist_element *ntfs_attr_find_vcn_nolock(ntfs_inode *ni, |
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const VCN vcn, ntfs_attr_search_ctx *ctx); |
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int ntfs_attr_lookup(const ATTR_TYPE type, const ntfschar *name, |
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const u32 name_len, const IGNORE_CASE_BOOL ic, |
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const VCN lowest_vcn, const u8 *val, const u32 val_len, |
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ntfs_attr_search_ctx *ctx); |
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extern int load_attribute_list(ntfs_volume *vol, runlist *rl, u8 *al_start, |
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const s64 size, const s64 initialized_size); |
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static inline s64 ntfs_attr_size(const ATTR_RECORD *a) |
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{ |
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if (!a->non_resident) |
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return (s64)le32_to_cpu(a->data.resident.value_length); |
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return sle64_to_cpu(a->data.non_resident.data_size); |
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} |
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extern void ntfs_attr_reinit_search_ctx(ntfs_attr_search_ctx *ctx); |
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extern ntfs_attr_search_ctx *ntfs_attr_get_search_ctx(ntfs_inode *ni, |
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MFT_RECORD *mrec); |
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extern void ntfs_attr_put_search_ctx(ntfs_attr_search_ctx *ctx); |
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#ifdef NTFS_RW |
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extern int ntfs_attr_size_bounds_check(const ntfs_volume *vol, |
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const ATTR_TYPE type, const s64 size); |
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extern int ntfs_attr_can_be_non_resident(const ntfs_volume *vol, |
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const ATTR_TYPE type); |
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extern int ntfs_attr_can_be_resident(const ntfs_volume *vol, |
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const ATTR_TYPE type); |
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extern int ntfs_attr_record_resize(MFT_RECORD *m, ATTR_RECORD *a, u32 new_size); |
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extern int ntfs_resident_attr_value_resize(MFT_RECORD *m, ATTR_RECORD *a, |
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const u32 new_size); |
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extern int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size); |
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extern s64 ntfs_attr_extend_allocation(ntfs_inode *ni, s64 new_alloc_size, |
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const s64 new_data_size, const s64 data_start); |
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extern int ntfs_attr_set(ntfs_inode *ni, const s64 ofs, const s64 cnt, |
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const u8 val); |
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#endif /* NTFS_RW */ |
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#endif /* _LINUX_NTFS_ATTRIB_H */
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