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Combine image related functions

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This commit is contained in:
topjohnwu 2017-08-10 17:26:37 +08:00
parent f0cfd60e62
commit 5cc14405c7
3 changed files with 76 additions and 75 deletions
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75
jni/daemon/bootstages.c
View File

@ -54,81 +54,6 @@ struct node_entry {
#define IS_LNK(n) (n->type == DT_LNK)
#define IS_REG(n) (n->type == DT_REG)
/******************
* Image handling *
******************/
#define round_size(a) ((((a) / 32) + 2) * 32)
#define SOURCE_TMP "/dev/source"
#define TARGET_TMP "/dev/target"
static int merge_img(const char *source, const char *target) {
if (access(source, F_OK) == -1)
return 0;
if (access(target, F_OK) == -1) {
rename(source, target);
return 0;
}
// resize target to worst case
int s_used, s_total, t_used, t_total, n_total;
get_img_size(source, &s_used, &s_total);
get_img_size(target, &t_used, &t_total);
n_total = round_size(s_used + t_used);
if (n_total != t_total)
resize_img(target, n_total);
xmkdir(SOURCE_TMP, 0755);
xmkdir(TARGET_TMP, 0755);
char *s_loop, *t_loop;
s_loop = mount_image(source, SOURCE_TMP);
if (s_loop == NULL) return 1;
t_loop = mount_image(target, TARGET_TMP);
if (t_loop == NULL) return 1;
DIR *dir;
struct dirent *entry;
if (!(dir = opendir(SOURCE_TMP)))
return 1;
while ((entry = xreaddir(dir))) {
if (entry->d_type == DT_DIR) {
if (strcmp(entry->d_name, ".") == 0 ||
strcmp(entry->d_name, "..") == 0 ||
strcmp(entry->d_name, ".core") == 0 ||
strcmp(entry->d_name, "lost+found") == 0)
continue;
// Cleanup old module if exists
snprintf(buf, PATH_MAX, "%s/%s", TARGET_TMP, entry->d_name);
if (access(buf, F_OK) == 0) {
LOGI("Upgrade module: %s\n", entry->d_name);
rm_rf(buf);
} else {
LOGI("New module: %s\n", entry->d_name);
}
}
}
closedir(dir);
clone_dir(SOURCE_TMP, TARGET_TMP);
// Unmount all loop devices
umount_image(SOURCE_TMP, s_loop);
umount_image(TARGET_TMP, t_loop);
rmdir(SOURCE_TMP);
rmdir(TARGET_TMP);
free(s_loop);
free(t_loop);
unlink(source);
return 0;
}
static void trim_img(const char *img) {
int used, total, new_size;
get_img_size(img, &used, &total);
new_size = round_size(used);
if (new_size != total)
resize_img(img, new_size);
}
/***********
* Scripts *
***********/

7
jni/include/utils.h
View File

@ -96,10 +96,17 @@ int switch_mnt_ns(int pid);
void link_busybox();
// img.c
#define round_size(a) ((((a) / 32) + 2) * 32)
#define SOURCE_TMP "/dev/source"
#define TARGET_TMP "/dev/target"
int create_img(const char *img, int size);
int get_img_size(const char *img, int *used, int *total);
int resize_img(const char *img, int size);
char *mount_image(const char *img, const char *target);
void umount_image(const char *target, const char *device);
int merge_img(const char *source, const char *target);
void trim_img(const char *img);
#endif

69
jni/utils/img.c
View File

@ -146,3 +146,72 @@ void umount_image(const char *target, const char *device) {
ioctl(fd, LOOP_CLR_FD);
close(fd);
}
int merge_img(const char *source, const char *target) {
if (access(source, F_OK) == -1)
return 0;
if (access(target, F_OK) == -1) {
rename(source, target);
return 0;
}
char buffer[PATH_MAX];
// resize target to worst case
int s_used, s_total, t_used, t_total, n_total;
get_img_size(source, &s_used, &s_total);
get_img_size(target, &t_used, &t_total);
n_total = round_size(s_used + t_used);
if (n_total != t_total)
resize_img(target, n_total);
xmkdir(SOURCE_TMP, 0755);
xmkdir(TARGET_TMP, 0755);
char *s_loop, *t_loop;
s_loop = mount_image(source, SOURCE_TMP);
if (s_loop == NULL) return 1;
t_loop = mount_image(target, TARGET_TMP);
if (t_loop == NULL) return 1;
DIR *dir;
struct dirent *entry;
if (!(dir = opendir(SOURCE_TMP)))
return 1;
while ((entry = xreaddir(dir))) {
if (entry->d_type == DT_DIR) {
if (strcmp(entry->d_name, ".") == 0 ||
strcmp(entry->d_name, "..") == 0 ||
strcmp(entry->d_name, ".core") == 0 ||
strcmp(entry->d_name, "lost+found") == 0)
continue;
// Cleanup old module if exists
snprintf(buffer, sizeof(buffer), "%s/%s", TARGET_TMP, entry->d_name);
if (access(buffer, F_OK) == 0) {
LOGI("Upgrade module: %s\n", entry->d_name);
rm_rf(buffer);
} else {
LOGI("New module: %s\n", entry->d_name);
}
}
}
closedir(dir);
clone_dir(SOURCE_TMP, TARGET_TMP);
// Unmount all loop devices
umount_image(SOURCE_TMP, s_loop);
umount_image(TARGET_TMP, t_loop);
rmdir(SOURCE_TMP);
rmdir(TARGET_TMP);
free(s_loop);
free(t_loop);
unlink(source);
return 0;
}
void trim_img(const char *img) {
int used, total, new_size;
get_img_size(img, &used, &total);
new_size = round_size(used);
if (new_size != total)
resize_img(img, new_size);
}