1
2
3
4
5
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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
Index: linux-3.10.12/arch/mips/lantiq/xway/Makefile
===================================================================
--- linux-3.10.12.orig/arch/mips/lantiq/xway/Makefile 2013-09-17 22:32:50.389021711 +0200
+++ linux-3.10.12/arch/mips/lantiq/xway/Makefile 2013-09-17 23:04:39.829103336 +0200
@@ -1,6 +1,6 @@
obj-y := prom.o sysctrl.o clk.o reset.o dma.o gptu.o dcdc.o
-obj-y += vmmc.o
+obj-y += vmmc.o mtd_split.o
obj-$(CONFIG_PCI) += ath_eep.o rt_eep.o pci-ath-fixup.o
Index: linux-3.10.12/arch/mips/lantiq/xway/mtd_split.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-3.10.12/arch/mips/lantiq/xway/mtd_split.c 2013-09-17 22:42:28.485046424 +0200
@@ -0,0 +1,151 @@
+#include <linux/magic.h>
+#include <linux/root_dev.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+
+#define ROOTFS_SPLIT_NAME "rootfs_data"
+
+struct squashfs_super_block {
+ __le32 s_magic;
+ __le32 pad0[9];
+ __le64 bytes_used;
+};
+
+static void split_brnimage_kernel(struct mtd_info *master, const char *name,
+ int offset, int size)
+{
+ unsigned long buf[4];
+ // Assume at most 2MB of kernel image
+ unsigned long end = offset + (2 << 20);
+ unsigned long part_size = offset + 0x400 - 12;
+ size_t len;
+ int ret;
+
+ if (strcmp(name, "rootfs") != 0)
+ return;
+ while (part_size < end) {
+ long size_min = part_size - 0x400 - 12 - offset;
+ long size_max = part_size + 12 - offset;
+ ret = mtd_read(master, part_size, 16, &len, (void *)buf);
+ if (ret || len != 16)
+ return;
+
+ if (le32_to_cpu(buf[0]) < size_min ||
+ le32_to_cpu(buf[0]) > size_max) {
+ part_size += 0x400;
+ continue;
+ }
+
+ if (le32_to_cpu(buf[3]) == SQUASHFS_MAGIC) {
+ part_size += 12 - offset;
+ __mtd_add_partition(master, "rootfs", offset + part_size,
+ size - part_size, false);
+ return;
+ }
+ part_size += 0x400;
+ }
+}
+
+static void split_eva_kernel(struct mtd_info *master, const char *name,
+ int offset, int size)
+{
+#define EVA_MAGIC 0xfeed1281
+ unsigned long magic = 0;
+ unsigned long part_size = 0;
+ size_t len;
+ int ret;
+
+ if (strcmp(name, CONFIG_MTD_SPLIT_FIRMWARE_NAME) != 0)
+ return;
+
+ ret = mtd_read(master, offset, 4, &len, (void *)&magic);
+ if (ret || len != sizeof(magic))
+ return;
+
+ if (le32_to_cpu(magic) != EVA_MAGIC)
+ return;
+
+ ret = mtd_read(master, offset + 4, 4, &len, (void *)&part_size);
+ if (ret || len != sizeof(part_size))
+ return;
+
+ part_size = le32_to_cpu(part_size) + 0x18;
+ part_size = mtd_pad_erasesize(master, offset, len);
+ if (part_size + master->erasesize > size)
+ return;
+
+ __mtd_add_partition(master, "rootfs", offset + part_size,
+ size - part_size, false);
+}
+
+static void split_tplink_kernel(struct mtd_info *master, const char *name,
+ int offset, int size)
+{
+#define TPLINK_MAGIC 0x00000002
+ unsigned long magic = 0;
+ unsigned long part_size = 0;
+ size_t len;
+ int ret;
+
+ if (strcmp(name, CONFIG_MTD_SPLIT_FIRMWARE_NAME) != 0)
+ return;
+
+ ret = mtd_read(master, offset, 4, &len, (void *)&magic);
+ if (ret || len != sizeof(magic))
+ return;
+
+ if (le32_to_cpu(magic) != TPLINK_MAGIC)
+ return;
+
+ ret = mtd_read(master, offset + 0x78, 4, &len, (void *)&part_size);
+ if (ret || len != sizeof(part_size))
+ return;
+
+ part_size = be32_to_cpu(part_size) + 0x200;
+ if (part_size + master->erasesize > size)
+ return;
+
+ __mtd_add_partition(master, "rootfs", offset + part_size,
+ size - part_size, false);
+}
+
+static void split_squashfs(struct mtd_info *master, const char *name,
+ int offset, int size)
+{
+ struct squashfs_super_block sb;
+ int len, ret;
+
+ offset += 0x100;
+ size -= 0x100;
+
+ ret = mtd_read(master, offset, sizeof(sb), &len, (void *) &sb);
+ if (ret || (len != sizeof(sb)))
+ return;
+
+ if (SQUASHFS_MAGIC != le32_to_cpu(sb.s_magic) )
+ return;
+
+ if (le64_to_cpu((sb.bytes_used)) <= 0)
+ printk(KERN_ALERT "split_squashfs: squashfs is empty in \"%s\"\n",
+ master->name);
+ return;
+
+ len = (u32) le64_to_cpu(sb.bytes_used);
+ len = mtd_pad_erasesize(master, offset, len);
+ offset += len;
+ size -= len ;
+ printk(KERN_INFO "mtd: partition \"%s\" created automatically, ofs=0x%x, len=0x%x\n",
+ ROOTFS_SPLIT_NAME, offset, size);
+
+ __mtd_add_partition(master, ROOTFS_SPLIT_NAME, offset,
+ size, false);
+}
+
+void arch_split_mtd_part(struct mtd_info *master, const char *name,
+ int offset, int size)
+{
+ split_tplink_kernel(master, name, offset, size);
+ split_eva_kernel(master, name, offset, size);
+ split_brnimage_kernel(master, name, offset, size);
+ split_squashfs(master, name, offset, size);
+}
Index: linux-3.10.12/include/linux/mtd/partitions.h
===================================================================
--- linux-3.10.12.orig/include/linux/mtd/partitions.h 2013-09-17 22:32:46.925021563 +0200
+++ linux-3.10.12/include/linux/mtd/partitions.h 2013-09-17 22:32:51.049021740 +0200
@@ -82,9 +82,14 @@
int mtd_is_partition(const struct mtd_info *mtd);
int mtd_add_partition(struct mtd_info *master, char *name,
long long offset, long long length);
+int __mtd_add_partition(struct mtd_info *master, char *name,
+ long long offset, long long length, bool dup_check);
+
int mtd_del_partition(struct mtd_info *master, int partno);
uint64_t mtd_get_device_size(const struct mtd_info *mtd);
-extern void __weak arch_split_mtd_part(struct mtd_info *master,
+void __weak arch_split_mtd_part(struct mtd_info *master,
const char *name, int offset, int size);
+unsigned long
+mtd_pad_erasesize(struct mtd_info *mtd, int offset, int len);
#endif
Index: linux-3.10.12/drivers/mtd/mtdpart.c
===================================================================
--- linux-3.10.12.orig/drivers/mtd/mtdpart.c 2013-09-17 22:32:46.973021565 +0200
+++ linux-3.10.12/drivers/mtd/mtdpart.c 2013-09-17 22:32:51.049021740 +0200
@@ -617,7 +617,7 @@
}
-static int
+int
__mtd_add_partition(struct mtd_info *master, char *name,
long long offset, long long length, bool dup_check)
{
@@ -707,7 +707,7 @@
}
EXPORT_SYMBOL_GPL(mtd_del_partition);
-static inline unsigned long
+unsigned long
mtd_pad_erasesize(struct mtd_info *mtd, int offset, int len)
{
unsigned long mask = mtd->erasesize - 1;
@@ -799,7 +799,6 @@
return;
len = be32_to_cpu(hdr.size) + 0x40;
- len = mtd_pad_erasesize(master, part->offset, len);
if (len + master->erasesize > part->mtd.size)
return;
|
