75 {
76 grub_uint16_t *pos;
77 grub_uint16_t sum = 0;
78
79 for (pos = label;
80 pos < (label + sizeof (struct grub_sun_block) / 2);
81 pos++)
82 sum ^= *pos;
83
84 return ! sum;
85 }
86
87 static grub_err_t
88 sun_partition_map_iterate (grub_disk_t disk,
89 int (*hook) (grub_disk_t disk,
90 const grub_partition_t partition))
91 {
92 struct grub_partition p;
93 union
94 {
95 struct grub_sun_block sun;
96 grub_uint16_t raw[0];
97 } block;
98 int partnum;
99 grub_err_t err;
100
101 p.partmap = &grub_sun_partition_map;
102 err = grub_disk_read (disk, 0, 0, sizeof (struct grub_sun_block),
103 &block);
104 if (err)
105 return err;
106
107 if (GRUB_PARTMAP_SUN_MAGIC != grub_be_to_cpu16 (block.sun.magic))
108 return grub_error (GRUB_ERR_BAD_PART_TABLE, "not a sun partition table");
109
110 if (! grub_sun_is_valid (block.raw))
111 return grub_error (GRUB_ERR_BAD_PART_TABLE, "invalid checksum");
112
113 /* Maybe another error value would be better, because partition
114 table _is_ recognized but invalid. */
115 for (partnum = 0; partnum < GRUB_PARTMAP_SUN_MAX_PARTS; partnum++)
116 {
117 struct grub_sun_partition_descriptor *desc;
118
119 if (block.sun.infos[partnum].id == 0
120 || block.sun.infos[partnum].id == GRUB_PARTMAP_SUN_WHOLE_DISK_ID)
121 continue;
122
123 desc = &block.sun.partitions[partnum];
124 p.start = ((grub_uint64_t) grub_be_to_cpu32 (desc->start_cylinder)
125 * grub_be_to_cpu16 (block.sun.ntrks)
126 * grub_be_to_cpu16 (block.sun.nsect));
127 p.len = grub_be_to_cpu32 (desc->num_sectors);
128 p.number = p.index = partnum;
129 if (p.len)
130 {
131 if (hook (disk, &p))
132 partnum = GRUB_PARTMAP_SUN_MAX_PARTS;
133 }
134 }
135
136 return grub_errno;
137 }
138
139 /* Partition map type. */
140 static struct grub_partition_map grub_sun_partition_map =
141 {
142 .name = "sun",
143 .iterate = sun_partition_map_iterate,
144 };
145
146 GRUB_MOD_INIT(part_sun)
|
75 {
76 grub_uint16_t *pos;
77 grub_uint16_t sum = 0;
78
79 for (pos = label;
80 pos < (label + sizeof (struct grub_sun_block) / 2);
81 pos++)
82 sum ^= *pos;
83
84 return ! sum;
85 }
86
87 static grub_err_t
88 sun_partition_map_iterate (grub_disk_t disk,
89 int (*hook) (grub_disk_t disk,
90 const grub_partition_t partition))
91 {
92 struct grub_partition p;
93 union
94 {
95 struct grub_sun_block sunb;
96 grub_uint16_t raw[0];
97 } block;
98 int partnum;
99 grub_err_t err;
100
101 p.partmap = &grub_sun_partition_map;
102 err = grub_disk_read (disk, 0, 0, sizeof (struct grub_sun_block),
103 &block);
104 if (err)
105 return err;
106
107 if (GRUB_PARTMAP_SUN_MAGIC != grub_be_to_cpu16 (block.sunb.magic))
108 return grub_error (GRUB_ERR_BAD_PART_TABLE, "not a sun partition table");
109
110 if (! grub_sun_is_valid (block.raw))
111 return grub_error (GRUB_ERR_BAD_PART_TABLE, "invalid checksum");
112
113 /* Maybe another error value would be better, because partition
114 table _is_ recognized but invalid. */
115 for (partnum = 0; partnum < GRUB_PARTMAP_SUN_MAX_PARTS; partnum++)
116 {
117 struct grub_sun_partition_descriptor *desc;
118
119 if (block.sunb.infos[partnum].id == 0
120 || block.sunb.infos[partnum].id == GRUB_PARTMAP_SUN_WHOLE_DISK_ID)
121 continue;
122
123 desc = &block.sunb.partitions[partnum];
124 p.start = ((grub_uint64_t) grub_be_to_cpu32 (desc->start_cylinder)
125 * grub_be_to_cpu16 (block.sunb.ntrks)
126 * grub_be_to_cpu16 (block.sunb.nsect));
127 p.len = grub_be_to_cpu32 (desc->num_sectors);
128 p.number = p.index = partnum;
129 if (p.len)
130 {
131 if (hook (disk, &p))
132 partnum = GRUB_PARTMAP_SUN_MAX_PARTS;
133 }
134 }
135
136 return grub_errno;
137 }
138
139 /* Partition map type. */
140 static struct grub_partition_map grub_sun_partition_map =
141 {
142 .name = "sun",
143 .iterate = sun_partition_map_iterate,
144 };
145
146 GRUB_MOD_INIT(part_sun)
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