Blame view
fs/ntfs/runlist.h
3.31 KB
1da177e4c Linux-2.6.12-rc2 |
1 2 3 4 |
/* * runlist.h - Defines for runlist handling in NTFS Linux kernel driver. * Part of the Linux-NTFS project. * |
53d59aad9 NTFS: Fix compila... |
5 |
* Copyright (c) 2001-2005 Anton Altaparmakov |
1da177e4c Linux-2.6.12-rc2 |
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 |
* Copyright (c) 2002 Richard Russon * * This program/include file is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program/include file is distributed in the hope that it will be * useful, but WITHOUT ANY WARRANTY; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program (in the main directory of the Linux-NTFS * distribution in the file COPYING); if not, write to the Free Software * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef _LINUX_NTFS_RUNLIST_H #define _LINUX_NTFS_RUNLIST_H #include "types.h" #include "layout.h" #include "volume.h" /** * runlist_element - in memory vcn to lcn mapping array element * @vcn: starting vcn of the current array element * @lcn: starting lcn of the current array element * @length: length in clusters of the current array element * * The last vcn (in fact the last vcn + 1) is reached when length == 0. * * When lcn == -1 this means that the count vcns starting at vcn are not * physically allocated (i.e. this is a hole / data is sparse). */ typedef struct { /* In memory vcn to lcn mapping structure element. */ VCN vcn; /* vcn = Starting virtual cluster number. */ LCN lcn; /* lcn = Starting logical cluster number. */ s64 length; /* Run length in clusters. */ } runlist_element; /** * runlist - in memory vcn to lcn mapping array including a read/write lock * @rl: pointer to an array of runlist elements * @lock: read/write spinlock for serializing access to @rl * */ typedef struct { runlist_element *rl; struct rw_semaphore lock; } runlist; static inline void ntfs_init_runlist(runlist *rl) { rl->rl = NULL; init_rwsem(&rl->lock); } typedef enum { LCN_HOLE = -1, /* Keep this as highest value or die! */ LCN_RL_NOT_MAPPED = -2, LCN_ENOENT = -3, |
c0c1cc0e4 NTFS: - Fix bug i... |
69 70 |
LCN_ENOMEM = -4, LCN_EIO = -5, |
1da177e4c Linux-2.6.12-rc2 |
71 72 73 74 75 76 77 78 79 |
} LCN_SPECIAL_VALUES; extern runlist_element *ntfs_runlists_merge(runlist_element *drl, runlist_element *srl); extern runlist_element *ntfs_mapping_pairs_decompress(const ntfs_volume *vol, const ATTR_RECORD *attr, runlist_element *old_rl); extern LCN ntfs_rl_vcn_to_lcn(const runlist_element *rl, const VCN vcn); |
53d59aad9 NTFS: Fix compila... |
80 81 82 83 |
#ifdef NTFS_RW extern runlist_element *ntfs_rl_find_vcn_nolock(runlist_element *rl, const VCN vcn); |
1da177e4c Linux-2.6.12-rc2 |
84 |
extern int ntfs_get_size_for_mapping_pairs(const ntfs_volume *vol, |
fa3be9231 NTFS: Add an extr... |
85 86 |
const runlist_element *rl, const VCN first_vcn, const VCN last_vcn); |
1da177e4c Linux-2.6.12-rc2 |
87 88 89 |
extern int ntfs_mapping_pairs_build(const ntfs_volume *vol, s8 *dst, const int dst_len, const runlist_element *rl, |
fa3be9231 NTFS: Add an extr... |
90 |
const VCN first_vcn, const VCN last_vcn, VCN *const stop_vcn); |
1da177e4c Linux-2.6.12-rc2 |
91 92 93 |
extern int ntfs_rl_truncate_nolock(const ntfs_volume *vol, runlist *const runlist, const s64 new_length); |
6e48321a4 NTFS: Add ntfs_rl... |
94 95 |
int ntfs_rl_punch_nolock(const ntfs_volume *vol, runlist *const runlist, const VCN start, const s64 length); |
53d59aad9 NTFS: Fix compila... |
96 |
#endif /* NTFS_RW */ |
1da177e4c Linux-2.6.12-rc2 |
97 |
#endif /* _LINUX_NTFS_RUNLIST_H */ |