resize2fs.h revision 1eb31c4885156b595e6ceb4516cb1e1fb2d251fd 
1/*
2 * resize2fs.h --- ext2 resizer header file
3 *
4 * Copyright (C) 1997, 1998 by Theodore Ts'o and
5 * 	PowerQuest, Inc.
6 *
7 * Copyright (C) 1999, 2000 by Theosore Ts'o
8 *
9 * %Begin-Header%
10 * This file may be redistributed under the terms of the GNU Public
11 * License.
12 * %End-Header%
13 */
14
15#include <stdio.h>
16#include <string.h>
17#ifdef HAVE_UNISTD_H
18#include <unistd.h>
19#endif
20#include <stdlib.h>
21#ifdef HAVE_SYS_TYPES_H
22#include <sys/types.h>
23#endif
24#ifdef HAVE_SYS_TIME_H
25#include <sys/time.h>
26#endif
27#if HAVE_ERRNO_H
28#include <errno.h>
29#endif
30
31#if EXT2_FLAT_INCLUDES
32#include "ext2_fs.h"
33#include "ext2fs.h"
34#include "e2p.h"
35#else
36#include "ext2fs/ext2_fs.h"
37#include "ext2fs/ext2fs.h"
38#include "e2p/e2p.h"
39#endif
40
41#ifdef ENABLE_NLS
42#include <libintl.h>
43#include <locale.h>
44#define _(a) (gettext (a))
45#ifdef gettext_noop
46#define N_(a) gettext_noop (a)
47#else
48#define N_(a) (a)
49#endif
50#ifndef NLS_CAT_NAME
51#define NLS_CAT_NAME "e2fsprogs"
52#endif
53#ifndef LOCALEDIR
54#define LOCALEDIR "/usr/share/locale"
55#endif
56#else
57#define _(a) (a)
58#define N_(a) a
59#endif
60
61
62/*
63 * For the extent map
64 */
65typedef struct _ext2_extent *ext2_extent;
66
67/*
68 * For the simple progress meter
69 */
70typedef struct ext2_sim_progress *ext2_sim_progmeter;
71
72/*
73 * Flags for the resizer; most are debugging flags only
74 */
75#define RESIZE_DEBUG_IO			0x0001
76#define RESIZE_DEBUG_BMOVE		0x0002
77#define RESIZE_DEBUG_INODEMAP		0x0004
78#define RESIZE_DEBUG_ITABLEMOVE		0x0008
79#define RESIZE_DEBUG_RTRACK		0x0010
80
81#define RESIZE_PERCENT_COMPLETE		0x0100
82#define RESIZE_VERBOSE			0x0200
83
84/*
85 * This structure is used for keeping track of how much resources have
86 * been used for a particular resize2fs pass.
87 */
88struct resource_track {
89	const char *desc;
90	struct timeval time_start;
91	struct timeval user_start;
92	struct timeval system_start;
93	void	*brk_start;
94	unsigned long long bytes_read;
95	unsigned long long bytes_written;
96};
97
98/*
99 * The core state structure for the ext2 resizer
100 */
101typedef struct ext2_resize_struct *ext2_resize_t;
102
103struct ext2_resize_struct {
104	ext2_filsys	old_fs;
105	ext2_filsys	new_fs;
106	ext2fs_block_bitmap reserve_blocks;
107	ext2fs_block_bitmap move_blocks;
108	ext2_extent	bmap;
109	ext2_extent	imap;
110	blk64_t		needed_blocks;
111	int		flags;
112	char		*itable_buf;
113
114	/*
115	 * For the block allocator
116	 */
117	blk64_t		new_blk;
118	int		alloc_state;
119
120	/*
121	 * For the progress meter
122	 */
123	errcode_t	(*progress)(ext2_resize_t rfs, int pass,
124				    unsigned long cur,
125				    unsigned long max);
126	void		*prog_data;
127};
128
129/*
130 * Progress pass numbers...
131 */
132#define E2_RSZ_EXTEND_ITABLE_PASS	1
133#define E2_RSZ_BLOCK_RELOC_PASS		2
134#define E2_RSZ_INODE_SCAN_PASS		3
135#define E2_RSZ_INODE_REF_UPD_PASS	4
136#define E2_RSZ_MOVE_ITABLE_PASS		5
137
138
139/* prototypes */
140extern errcode_t resize_fs(ext2_filsys fs, blk64_t *new_size, int flags,
141			   errcode_t	(*progress)(ext2_resize_t rfs,
142					    int pass, unsigned long cur,
143					    unsigned long max));
144
145extern errcode_t adjust_fs_info(ext2_filsys fs, ext2_filsys old_fs,
146				ext2fs_block_bitmap reserve_blocks,
147				blk64_t new_size);
148extern blk64_t calculate_minimum_resize_size(ext2_filsys fs);
149
150
151/* extent.c */
152extern errcode_t ext2fs_create_extent_table(ext2_extent *ret_extent,
153					    __u64 size);
154extern void ext2fs_free_extent_table(ext2_extent extent);
155extern errcode_t ext2fs_add_extent_entry(ext2_extent extent,
156					 __u64 old_loc, __u64 new_loc);
157extern __u64 ext2fs_extent_translate(ext2_extent extent, __u64 old_loc);
158extern void ext2fs_extent_dump(ext2_extent extent, FILE *out);
159extern errcode_t ext2fs_iterate_extent(ext2_extent extent, __u64 *old_loc,
160				       __u64 *new_loc, __u64 *size);
161
162/* online.c */
163extern errcode_t online_resize_fs(ext2_filsys fs, const char *mtpt,
164				  blk64_t *new_size, int flags);
165
166/* resource_track.c */
167extern void init_resource_track(struct resource_track *track, const char *desc,
168				io_channel channel);
169extern void print_resource_track(ext2_resize_t rfs,
170				 struct resource_track *track,
171				 io_channel channel);
172
173/* sim_progress.c */
174extern errcode_t ext2fs_progress_init(ext2_sim_progmeter *ret_prog,
175				      const char *label,
176				      int labelwidth, int barwidth,
177				      __u32 maxdone, int flags);
178extern void ext2fs_progress_update(ext2_sim_progmeter prog,
179					__u32 current);
180extern void ext2fs_progress_close(ext2_sim_progmeter prog);
181
182
183