/* When the flash memory scan has completed, this function should be called
before use of the control structure. */
void jffs_build_end(struct jffs_fmcontrol *fmc)
{
D3(printk("jffs_build_end()\n"));
if (!fmc->head) {
fmc->head = fmc->head_extra;
fmc->tail = fmc->tail_extra;
}
else if (fmc->head_extra) {
fmc->tail_extra->next = fmc->head;
fmc->head->prev = fmc->tail_extra;
fmc->head = fmc->head_extra;
}
fmc->head_extra = NULL; /* These two instructions should be omitted. */
fmc->tail_extra = NULL;
D3(jffs_print_fmcontrol(fmc));
}
/* When the flash memory scan has completed, this function should be called
before use of the control structure. */
int
jffs_build_end(struct jffs_fmcontrol *fmc, __u32 head_offset)
{
D3(printk("jffs_build_end()\n"));
if (!fmc->head) {
fmc->head = fmc->head_extra;
fmc->tail = fmc->tail_extra;
}
else if (fmc->head_extra) {
struct jffs_fm *fm, *cur;
if (head_offset == fmc->head->offset){
fmc->tail->next = fmc->head_extra;
fmc->head_extra->prev = fmc->tail;
fmc->tail = fmc->tail_extra;
}
else {
fmc->tail_extra->next = fmc->head;
fmc->head->prev = fmc->tail_extra;
fmc->head = fmc->head_extra;
while (fmc->head->offset != head_offset){
fmc->tail->next = fmc->head;
fmc->head = fmc->head->next;
fmc->head->prev = 0;
fmc->tail->next->prev = fmc->tail;
fmc->tail = fmc->tail->next;
fmc->tail->next = 0;
}
}
/* Make sure the only free space we have is between tail and head.
*/
for (cur = fmc->head; cur && cur != fmc->tail;) {
if (cur->offset + cur->size < cur->next->offset) {
if (!(fm = kmalloc(sizeof(struct jffs_fm), GFP_KERNEL))) {
D(printk("jffs_buid_end(): kmalloc failed!\n"));
return -ENOMEM;
}
DJM(no_jffs_fm++);
fm->size = cur->next->offset - cur->offset - cur->size;
fm->offset = cur->offset + cur->size;
fm->nodes = 0;
fm->next = cur->next;
fm->prev = cur;
cur->next->prev = fm;
cur->next = fm;
cur = fm->next;
fmc->free_size -= fm->size;
fmc->dirty_size += fm->size;
}
else if (cur->offset > cur->next->offset) {
if (cur->offset + cur->size < fmc->flash_size){
if (!(fm = kmalloc(sizeof(struct jffs_fm), GFP_KERNEL))){
D(printk("jffs_buid_end(): kmalloc failed!\n"));
return -ENOMEM;
}
DJM(no_jffs_fm++);
fm->size = fmc->flash_size -
cur->offset - cur->size;
fm->nodes = 0;
fm->offset = cur->offset + cur->size;
fm->next = cur->next;
fm->prev = cur;
cur->next->prev = fm;
cur->next = fm;
cur = fm->next;
fmc->free_size -= fm->size;
fmc->dirty_size += fm->size;
}
else {
cur = cur->next;
}
if (cur->offset > 0) {
if (!(fm = kmalloc(sizeof(struct jffs_fm), GFP_KERNEL))) {
D(printk("jffs_buid_end(): kmalloc failed!\n"));
return -ENOMEM;
}
DJM(no_jffs_fm++);
fm->size = cur->offset;
fm->nodes = 0;
fm->offset = 0;
fm->next = cur;
fm->prev = cur->prev;
cur->prev->next = fm;
cur->prev = fm;
fmc->free_size -= fm->size;
fmc->dirty_size += fm->size;
}
}
else if (cur->offset + cur->size != cur->next->offset) {
printk("jffs_build_end(): Internal error.\n");
return -EINVAL;
}
else {
cur = cur->next;
}
}
}
fmc->head_extra = 0; /* These two instructions should be omitted. */
fmc->tail_extra = 0;
D3(jffs_print_fmcontrol(fmc));
return 0;
}
