#include "libfstools.h"
#include "volume.h"
+#include "snapshot.h"
-#define PATH_MAX 256
-#define OWRT 0x4f575254
-#define DATA 0x44415441
-#define CONF 0x434f4e46
-
-struct file_header {
- uint32_t magic;
- uint32_t type;
- uint32_t seq;
- uint32_t length;
- uint32_t md5[4];
-};
-
-static inline int
-is_config(struct file_header *h)
-{
- return ((h->magic == OWRT) && (h->type == CONF));
-}
-
-static inline int
-valid_file_size(int fs)
-{
- if ((fs > 8 * 1024 * 1204) || (fs <= 0))
- return -1;
-
- return 0;
-}
-
-static void
-hdr_to_be32(struct file_header *hdr)
-{
- uint32_t *h = (uint32_t *) hdr;
- int i;
-
- for (i = 0; i < sizeof(struct file_header) / sizeof(uint32_t); i++)
- h[i] = cpu_to_be32(h[i]);
-}
-
-static void
-be32_to_hdr(struct file_header *hdr)
-{
- uint32_t *h = (uint32_t *) hdr;
- int i;
-
- for (i = 0; i < sizeof(struct file_header) / sizeof(uint32_t); i++)
- h[i] = be32_to_cpu(h[i]);
-}
-
-static int
-pad_file_size(struct volume *v, int size)
-{
- int mod;
-
- size += sizeof(struct file_header);
- mod = size % v->block_size;
- if (mod) {
- size -= mod;
- size += v->block_size;
- }
-
- return size;
-}
-
-static int
+int
verify_file_hash(char *file, uint32_t *hash)
{
uint32_t md5[4];
return 0;
}
-static int
+int
snapshot_next_free(struct volume *v, uint32_t *seq)
{
struct file_header hdr = { 0 };
return block;
}
-static int
+int
config_find(struct volume *v, struct file_header *conf, struct file_header *sentinel)
{
uint32_t seq;
return -1;
}
-static int
+int
snapshot_write_file(struct volume *v, int block, char *file, uint32_t seq, uint32_t type)
{
uint32_t md5[4] = { 0 };
return ret;
}
-static int
+int
snapshot_read_file(struct volume *v, int block, char *file, uint32_t type)
{
struct file_header hdr;
return -1;
}
+ offset = block * v->block_size + sizeof(hdr);
+
while (hdr.length > 0) {
int len = sizeof(buffer);
if (hdr.length < len)
len = hdr.length;
- if ((volume_read(v, buffer, offset, len) != len) || (write(out, buffer, len) != len))
+ if (volume_read(v, buffer, offset, len))
+ return -1;
+ if (write(out, buffer, len) != len)
return -1;
-
offset += len;
hdr.length -= len;
}
return block;
}
-static int
+int
sentinel_write(struct volume *v, uint32_t _seq)
{
int ret, block;
return ret;
}
-static int
+int
volatile_write(struct volume *v, uint32_t _seq)
{
int block, ret;
}
static int
-snapshot_sync(void)
+snapshot_sync(struct volume *v)
{
- struct volume *v = volume_find("rootfs_data");
struct file_header sentinel, conf;
int next, block = 0;
uint32_t seq;
- if (!v)
- return -1;
-
next = snapshot_next_free(v, &seq);
block = config_find(v, &conf, &sentinel);
if (is_config(&conf) && conf.seq != seq) {
}
int
-mount_snapshot(void)
+mount_snapshot(struct volume *v)
{
- snapshot_sync();
+ snapshot_sync(v);
setenv("SNAPSHOT", "magic", 1);
_ramoverlay("/rom", "/overlay");
system("/sbin/snapshot unpack");