fsutils.c (e5d31070) fsutils.c (422ee277)
1/***************************************************************************
2 *
3 * fsutils.c : filesystem utilities
4 *
1/***************************************************************************
2 *
3 * fsutils.c : filesystem utilities
4 *
5 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
5 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
6 * Use is subject to license terms.
7 *
8 * Licensed under the Academic Free License version 2.1
9 *
10 **************************************************************************/
11
12#pragma ident "%Z%%M% %I% %E% SMI"
13

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107};
108
109enum { WALK_CONTINUE, WALK_TERMINATE };
110
111/*
112 * Walk partition tables and invoke a callback for each.
113 */
114static void
6 * Use is subject to license terms.
7 *
8 * Licensed under the Academic Free License version 2.1
9 *
10 **************************************************************************/
11
12#pragma ident "%Z%%M% %I% %E% SMI"
13

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107};
108
109enum { WALK_CONTINUE, WALK_TERMINATE };
110
111/*
112 * Walk partition tables and invoke a callback for each.
113 */
114static void
115walk_partitions(int fd, int startsec, int (*f)(void *, int, int, int),
116 void *arg)
115walk_partitions(int fd, int startsec, uint_t secsz,
116 int (*f)(void *, int, int, int), void *arg)
117{
118 uint32_t buf[1024/4];
119 int bufsize = 1024;
120 struct mboot *mboot = (struct mboot *)&buf[0];
121 struct ipart ipart[FD_NUMPART];
122 int sec = startsec;
123 int lastsec = sec + 1;
124 int relsect;
125 int ext = 0;
126 int systid;
127 boolean_t valid;
128 int i;
129
130 while (sec != lastsec) {
117{
118 uint32_t buf[1024/4];
119 int bufsize = 1024;
120 struct mboot *mboot = (struct mboot *)&buf[0];
121 struct ipart ipart[FD_NUMPART];
122 int sec = startsec;
123 int lastsec = sec + 1;
124 int relsect;
125 int ext = 0;
126 int systid;
127 boolean_t valid;
128 int i;
129
130 while (sec != lastsec) {
131 if (pread(fd, buf, bufsize, (off_t)sec * 512) != bufsize) {
131 if (pread(fd, buf, bufsize, (off_t)sec * secsz) != bufsize) {
132 break;
133 }
134 lastsec = sec;
135 if (ltohs(mboot->signature) != MBB_MAGIC) {
136 break;
137 }
138 bcopy(mboot->parts, ipart, FD_NUMPART * sizeof (struct ipart));
139

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177 return (WALK_CONTINUE);
178}
179
180/*
181 * Given a dos drive number, return its relative sector number,
182 * number of sectors in partition and the system id.
183 */
184boolean_t
132 break;
133 }
134 lastsec = sec;
135 if (ltohs(mboot->signature) != MBB_MAGIC) {
136 break;
137 }
138 bcopy(mboot->parts, ipart, FD_NUMPART * sizeof (struct ipart));
139

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177 return (WALK_CONTINUE);
178}
179
180/*
181 * Given a dos drive number, return its relative sector number,
182 * number of sectors in partition and the system id.
183 */
184boolean_t
185find_dos_drive(int fd, int num, int *relsect, int *numsect, int *systid)
185find_dos_drive(int fd, int num, uint_t secsz, off_t *offset)
186{
187 struct part_find_s p = { 0, 0, 0, 0, 0, 0 };
188
189 p.num = num;
190
191 if (num > 0) {
186{
187 struct part_find_s p = { 0, 0, 0, 0, 0, 0 };
188
189 p.num = num;
190
191 if (num > 0) {
192 walk_partitions(fd, 0, find_dos_drive_cb, &p);
192 walk_partitions(fd, 0, secsz, find_dos_drive_cb, &p);
193 if (p.count == num) {
193 if (p.count == num) {
194 *relsect = p.r_relsect;
195 *numsect = p.r_numsect;
196 *systid = p.r_systid;
194 *offset = (off_t)p.r_relsect * secsz;
197 return (B_TRUE);
198 }
199 }
200
201 return (B_FALSE);
202}
203
204static int
205get_num_dos_drives_cb(void *arg, int systid, int relsect, int numsect)
206{
207 if (is_dos_drive(systid)) {
208 (*(int *)arg)++;
209 }
210 return (WALK_CONTINUE);
211}
212
213int
195 return (B_TRUE);
196 }
197 }
198
199 return (B_FALSE);
200}
201
202static int
203get_num_dos_drives_cb(void *arg, int systid, int relsect, int numsect)
204{
205 if (is_dos_drive(systid)) {
206 (*(int *)arg)++;
207 }
208 return (WALK_CONTINUE);
209}
210
211int
214get_num_dos_drives(int fd)
212get_num_dos_drives(int fd, uint_t secsz)
215{
216 int count = 0;
217
213{
214 int count = 0;
215
218 walk_partitions(fd, 0, get_num_dos_drives_cb, &count);
216 walk_partitions(fd, 0, secsz, get_num_dos_drives_cb, &count);
219
220 return (count);
221}
222
223/*
224 * Return true if all non-empty slices in vtoc have identical start/size and
225 * are tagged backup/entire disk.
226 */

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218 return (count);
219}
220
221/*
222 * Return true if all non-empty slices in vtoc have identical start/size and
223 * are tagged backup/entire disk.
224 */

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