/*
* sfs_block_inuse - check the inode with NO. ino inuse info in bitmap
*/
static bool
sfs_block_inuse(struct sfs_fs *sfs, uint32_t ino) {
if (ino != 0 && ino < sfs->super.blocks) {
return !bitmap_test(sfs->freemap, ino);
}
panic("sfs_block_inuse: called out of range (0, %u) %u.\n", sfs->super.blocks, ino);
}
/**
* update Delta and activeset, and packing the recv_buf
*/
int ClientProc::UpdtAsDelta(int t)
{
int bid = _blk_iter_order[t];
client_t *blk = _blks + bid;
double *D = _recv_buf[t];
pthread_mutex_lock(&_as_lock);
ix_t c1 = 0, c2 = 0;
for (ix_t j = 0; j < blk->p; j++) {
if (!bitmap_test(j, blk->as)) {
continue;
}
double d = D[c1++];
if (d > 100) {
bitmap_clr(j, blk->as);
blk->nas --;
d = 0;
} else {
D[c2++] = d;
}
blk->delta[j] = 2 * fabs(d) + .1;
}
pthread_mutex_unlock(&_as_lock);
#ifdef _DEBUG_
DEBUG("t %3d, r [%d] blk [%d], bitmap nnz [%u] after updt exw",
t, _my_rank, bid, blk->nas);
#endif
return 0;
}
static void check_output(struct gpio_kp *kp, int out, int polarity)
{
struct gpio_keypad_info *kpinfo = kp->keypad_info;
int key_index;
int in;
int gpio;
int changed = 0;
key_index = out * kpinfo->ninputs;
for (in = 0; in < kpinfo->ninputs; in++, key_index++) {
gpio = kpinfo->input_gpios[in];
changed = 0;
if (gpio_get(gpio) ^ !polarity) {
if (kp->some_keys_pressed < 3)
kp->some_keys_pressed++;
changed = !bitmap_set(kp->keys_pressed, key_index);
} else {
changed = bitmap_clear(kp->keys_pressed, key_index);
}
if (changed) {
int state = bitmap_test(kp->keys_pressed, key_index);
keys_post_event(kpinfo->keymap[key_index], state);
}
}
/* sets up the right state for the next poll cycle */
gpio = kpinfo->output_gpios[out];
if (kpinfo->flags & GPIOKPF_DRIVE_INACTIVE)
gpio_set(gpio, !polarity);
else
gpio_config(gpio, GPIO_INPUT);
}
uint32
bitmap_scan (struct bitmap* bmap, size_t num)
{
uint32 i;
if (bmap == NULL || num == 0) return BITMAP_ERROR;
for (i = 0; i < bmap->length; i++)
{
if (bmap->bits[i] != 0xFFFFFFFF)
{
uint32 j;
uint32 count = 0;
for (j = 0; j < 31; j++)
{
if (bitmap_test (bmap, i * 32 + j))
count = 0;
else
count++;
if (count == num)
break;
}
if (count == num)
/* J is the index */
return i * 32 + j;
}
}
return BITMAP_ERROR;
};
/**
* This function will cause - given page to reinstate from swap sectors to frame
*/
void swap_page_in_from_disk_to_frame (struct supplementary_page_table_entry * page)
{
int i = 0;
if (swap_sectors_btmp == NULL)
{
PANIC("NO swap sectors bitmap available!!! :(");
} else if (bitmap_test (swap_sectors_btmp, page->area_swap) == false)
{
PANIC("Reading from non empty swap sectors!!! :(");
}
for (i = 0; i < NUM_OF_PER_PAGE_SECTORS; i++)
{
block_read (swap_partition,
( page->area_swap * NUM_OF_PER_PAGE_SECTORS ) + i,
// block_read (swap_partition, page->area_swap + i,
page->supplementary_frame_in_memory-> base_vir_address + i * BLOCK_SECTOR_SIZE);
}
// Reset the sector bit in swap_sector_bitmap to 0 - indicate
// its free now and can be used by other page-swaps
bitmap_set (swap_sectors_btmp, page->area_swap, false);
// Set the Index of a block device sector to maximum value,
// BITMAP_ERROR - indicating its not swapped
page->area_swap = (block_sector_t) -1;
}
/** Reserve an ID in the allocator.
* @param alloc Allocator to reserve in.
* @param id ID to reserve. */
void id_allocator_reserve(id_allocator_t *alloc, int32_t id) {
mutex_lock(&alloc->lock);
assert(!bitmap_test(alloc->bitmap, id));
bitmap_set(alloc->bitmap, id);
mutex_unlock(&alloc->lock);
}
int keys_get_state(uint16_t code)
{
if (code >= MAX_KEYS) {
return -1;
}
return bitmap_test(key_bitmap, code);
}
void swap_remove (uint32_t swap_index)
{
ASSERT (swap_index < total_swap_size);
lock_acquire (&swap_lock);
ASSERT (bitmap_test (swap_bitmap, swap_index));
bitmap_reset (swap_bitmap, swap_index);
lock_release (&swap_lock);
}
/** Free a previously allocated ID.
* @param alloc Allocator to free to.
* @param id ID to free. */
void id_allocator_free(id_allocator_t *alloc, int32_t id) {
mutex_lock(&alloc->lock);
assert(bitmap_test(alloc->bitmap, id));
bitmap_clear(alloc->bitmap, id);
mutex_unlock(&alloc->lock);
}
size_t bitmap_ffz(const bitmap_t *const bitmap) {
// Same thing as ffs but compare with the NOt version of what you compare with in ffs to check for a 0 instead of 1
if (!bitmap) return SIZE_MAX; // error check params
size_t i;
size_t total_bits = bitmap->bit_count;
for (i=total_bits;i>=1;i--) { // loop through bits to find which is the first that isn't checked
if (!bitmap_test(bitmap, i-1)) return i-1;
}
return SIZE_MAX;
}
size_t block_store_write(block_store_t *const bs, const size_t block_id, const void *buffer, const size_t nbytes, const size_t offset) {
if (bs && bs->fbm && bs->data_blocks && BLOCKID_VALID(block_id)
&& buffer && nbytes && (nbytes + offset <= BLOCK_SIZE)) {
size_t total_offset = offset + (BLOCK_SIZE * (block_id - FBM_SIZE));
memcpy((void *)(bs->data_blocks + total_offset), buffer, nbytes);
block_store_errno = bitmap_test(bs->fbm, block_id) ? BS_OK : BS_FBM_REQUEST_MISMATCH;
return nbytes;
}
block_store_errno = BS_FATAL;
return 0;
}
size_t bitmap_ffs(const bitmap_t *const bitmap) {
// Start at the end of the array "front of the bit string" and check from left to right "high bit to low bit" for the first 1
if (!bitmap) return SIZE_MAX; // error check parameters
int i;
size_t total_bits = bitmap->bit_count;
for (i=total_bits-1;i>=0;i--) { // loops through each bit to see which is the first set bit
if (bitmap_test(bitmap, i)) return (size_t)i; // use bitmap_test function to test each bit
}
return SIZE_MAX; // return size_max if not found
}
/* Swap a page back to frame. */
void
swap_back_to_frame (int slot_index, uint8_t *kpage)
{
if (!lock_held_by_current_thread (&swap_table_lock))
lock_acquire (&swap_table_lock);
ASSERT (bitmap_test (swap_table, slot_index) == true);
bitmap_flip (swap_table, slot_index);
int i = 0;
for (i = 0; i < 8; i++)
block_read (swap_block, slot_index * 8 + i, kpage + i * BLOCK_SECTOR_SIZE);
lock_release (&swap_table_lock);
}
// Need to refactor this for V3. Have this switch on FILE_BASED and have it either do
// block_mem_write or block_file_write (both with same params) which then handles everything
// (same for read)
size_t block_store_write(block_store_t *const bs, const size_t block_id, const void *buffer, const size_t nbytes, const size_t offset) {
if (bs && BLOCKID_VALID(block_id) && buffer && nbytes && (nbytes + offset <= BLOCK_SIZE)) {
// Not going to forbid writing of not-in-use blocks (but we'll log it via errno)
bitmap_set(bs->dbm, block_id);
FLAG_SET(bs, DIRTY);
memcpy((void *)(bs->data_blocks + BLOCK_OFFSET_POSITION(block_id, offset)), buffer, nbytes);
bs_errno = bitmap_test(bs->fbm, block_id) ? BS_OK : BS_REQUEST_MISMATCH;
return nbytes;
}
bs_errno = BS_PARAM;
return 0;
}
size_t bitmap_ffz(const bitmap_t *const bitmap) {
if(!bitmap) { //Bitmap does not exist
return SIZE_MAX;
}
for(int counter = 0; counter < bitmap->bit_count; ++counter) { //Loops through all of the bits and tests to find the first not set bit
if(!bitmap_test(bitmap, counter)) {
return counter;
}
}
return SIZE_MAX; //Return SIZE_MAX if not found
}
size_t block_store_read(const block_store_t *const bs, const size_t block_id, void *buffer, const size_t nbytes, const size_t offset) {
if (bs && BLOCKID_VALID(block_id) && buffer && nbytes && (nbytes + offset <= BLOCK_SIZE)) {
// Not going to forbid reading of not-in-use blocks (but we'll log it via the errno)
memcpy(buffer, bs->data_blocks + BLOCK_OFFSET_POSITION(block_id, offset), nbytes);
bs_errno = bitmap_test(bs->fbm, block_id) ? BS_OK : BS_REQUEST_MISMATCH;
return nbytes;
}
// technically we return BS_PARAM even if the internal structure of the BS object is busted
// Which, in reality, would be more of a BS_INTERNAL or a BS_FATAL... but it'll add another branch to everything
// And technically the bs is a parameter...
bs_errno = BS_PARAM;
return 0;
}
/**
* Set bit in bitmap
*
* @v bitmap Bitmap
* @v bit Bit index
*/
void bitmap_set ( struct bitmap *bitmap, unsigned int bit ) {
unsigned int index = BITMAP_INDEX ( bit );
bitmap_block_t mask = BITMAP_MASK ( bit );
DBGC ( bitmap, "Bitmap %p setting bit %d\n", bitmap, bit );
/* Update bitmap */
bitmap->blocks[index] |= mask;
/* Update first gap counter */
while ( bitmap_test ( bitmap, bitmap->first_gap ) ) {
bitmap->first_gap++;
}
}
void swap_read (void *dest, uint32_t swap_index)
{
uint32_t i;
ASSERT (swap_index < total_swap_size);
lock_acquire (&swap_lock);
ASSERT (bitmap_test (swap_bitmap, swap_index));
bitmap_reset (swap_bitmap, swap_index);
for (i = 0u; i < blocks_per_page; i++)
{
block_read (swap_block, swap_index * blocks_per_page + i,
(char *)dest + i * BLOCK_SECTOR_SIZE);
}
lock_release (&swap_lock);
}
//Loads from the swap to main memory
void swap_in (size_t used_index, void* frame){
if (!swap_block || !swap_map)
return; //Returns if there is no swap block or frame
lock_acquire(&swap_lock); //Acquires the lock status for swap
if (bitmap_test(swap_map, used_index) == SWAP_FREE)
PANIC ("Trying to swap in a free block! Kernel panicking."); //Goes into panic mode if the swap block is free and swap in is in process
bitmap_flip(swap_map, used_index); //Flips the bitmap
size_t i;
for (i = 0; i < SECTORS_PER_PAGE; i++){ //Block reader
block_read(swap_block, used_index * SECTORS_PER_PAGE + i,
(uint8_t *) frame + i * BLOCK_SECTOR_SIZE);
}
lock_release(&swap_lock); //Releases the swap lock
}
void swap_in(size_t used_index,void *kaddr)
{
if(!swap_block||!swap_map)return ;
lock_acquire(&swap_lock);
if(bitmap_test(swap_map,used_index) == SWAP_FREE);
bitmap_flip(swap_map,used_index);
size_t i;
for(i = 0;i< SECTORS_PER_PAGE;i++)
{
block_read(swap_block,used_index*SECTORS_PER_PAGE +i,
(uint8_t *)kaddr + i*BLOCK_SECTOR_SIZE);
}
lock_release(&swap_lock);
}
void
free_slot (void *page, size_t index)
{
/* Mark the slot as free again */
ASSERT (bitmap_test (swap_slot_map, index));
bitmap_flip (swap_slot_map, index);
/* This is almost identical to the loop in pick_slot_and_swap, we're just
going the other way */
int i = 0;
for (; i < SECTORS_PER_PAGE; ++i)
{
block_read (block_device, (index * SECTORS_PER_PAGE) + i,
page + (BLOCK_SECTOR_SIZE * i));
}
}
/* move data from swap slot to frame */
void vm_swap_in(size_t idx, void *page){
lock_acquire(&swap_lock);
if (!bitmap_test(swap_partition, idx)){
/* Swap slot is already free */
lock_release(&swap_lock);
PANIC("Swap slot is already free\n");
}
bitmap_flip(swap_partition, idx);
size_t i;
for (i = 0; i < SECTORS_PER_PAGE; ++i){
block_read(swap_slot, (idx * SECTORS_PER_PAGE) + i, page + (BLOCK_SECTOR_SIZE * i));
}
lock_release(&swap_lock);
}
bool block_store_request(block_store_t *const bs, const size_t block_id) {
if (bs && BLOCKID_VALID(block_id)) {
if (!bitmap_test(bs->fbm, block_id)) {
bitmap_set(bs->fbm, block_id);
bitmap_set(bs->dbm, FBM_BLOCK_CHANGE_LOCATION(block_id));
// Set that FBM block as changed
FLAG_SET(bs, DIRTY);
bs_errno = BS_OK;
return true;
} else {
bs_errno = BS_IN_USE;
return false;
}
}
bs_errno = BS_PARAM;
return false;
}
/* write the cache entry back to disk */
static void
cache_writeback (int idx)
{
if(CACHE_DEBUG) printf("writeback cache block %i to disk block %i\n", idx, (int) cache[idx]->bid);
ASSERT(bitmap_test (cache_table,idx));
ASSERT(lock_held_by_current_thread(&cache_globallock));
/* register as writer */
cache[idx]->writer++;
/* if cache block is dirty right it back */
if (cache[idx]->dirty)
block_write(fs_device, cache[idx]->bid, cache[idx]->kpage);
/* unregister as writer */
cache[idx]->writer--;
}
/* Swaps in page P, which must have a locked frame
(and be swapped out). */
void swap_in(void *f, size_t index) {
if (!swap_device || !swap_bitmap) {
PANIC("No swap partition available!");
}
lock_acquire(&swap_lock);
if (bitmap_test(swap_bitmap, index) == SWAP_FREE) {
lock_release(&swap_lock);
return;
}
bitmap_flip(swap_bitmap, index);
lock_release(&swap_lock);
size_t i;
for (i = 0; i < SECTORS_PER_PAGE; i++) {
block_read(swap_device, index * SECTORS_PER_PAGE + i,
(uint8_t *) f + i * BLOCK_SECTOR_SIZE);
}
}
//
//go through m_pools_to_delete bitmap to delete each pool
//
int NVM_KV_Pool_Del_Manager::start_pool_delete(bool delete_all_pools)
{
NVM_KV_Store *kv_store = get_store();
uint32_t max_pools = kv_store->get_store_metadata()->max_pools;
int ret_code = NVM_SUCCESS;
if (delete_all_pools)
{
if ((ret_code = delete_pool(-1, m_validate_pool_id_on_media))
!= NVM_SUCCESS)
{
return ret_code;
}
if ((ret_code =
kv_store->get_pool_mgr()->clear_pool_bitmaps(m_pools_to_delete))
!= NVM_SUCCESS)
{
return ret_code;
}
}
else
{
for (uint32_t i = 1; i < max_pools; i++)
{
if (bitmap_test(m_pools_to_delete, i))
{
if ((ret_code = delete_pool(i, m_validate_pool_id_on_media))
!= NVM_SUCCESS)
{
return ret_code;
}
if ((ret_code =
kv_store->get_pool_mgr()->clear_pool_bitmaps(i))
!= NVM_SUCCESS)
{
return ret_code;
}
}
}
}
return ret_code;
}
//get a page from the swap table and save it to a memory position
void get_swap (size_t idx, void * addr) {
//check if bitmap is set correctly
ASSERT(bitmap_test (swap_table,idx));
int i;
//get frame and the memory position and write it to swap
for (i = 0; i< SECPP; i++)
//read the value from swap to addr
block_read (swap, idx * SECPP + i, addr + BLOCK_SECTOR_SIZE * i);
//lock the swap table
lock_acquire(&swap_lock);
//remove the swap entry at position idx
bitmap_set (swap_table, idx, false);
//release the lock for the swap table
lock_release(&swap_lock);
}
void add_page_to_swapfile(struct page_info* p) {
lock_acquire(&swap_lock);
// Find the first open 4KB slot in the swap file
unsigned int index = bitmap_scan_and_flip(swapmap, 0, 1, false);
ASSERT(index != BITMAP_ERROR);
ASSERT(bitmap_test(swapmap, index)); // should be true i.e. occupied
// Write out the passed-in page to that 4KB slot
// We're going to need to write out eight sectors, one at a time
block_sector_t sector_index = index * SECTORS_PER_PAGE;
int i;
for(i = 0; i < SECTORS_PER_PAGE; i++) {
block_sector_t target_sector = sector_index + i;
void* source_buf = (uint8_t *)p->virtual_address + (i * BLOCK_SECTOR_SIZE);
block_write(swap_block, target_sector, source_buf);
}
p->swap_info.swap_index = index;
lock_release(&swap_lock);
}
void swap_in (size_t used_index, void* frame)
{
if (!swap_block || !swap_map)
{
return;
}
lock_acquire(&swap_lock);
if (bitmap_test(swap_map, used_index) == SWAP_FREE)
{
PANIC ("Trying to swap in a free block! Kernel panicking.");
}
bitmap_flip(swap_map, used_index);
size_t i;
for (i = 0; i < SECTORS_PER_PAGE; i++)
{
block_read(swap_block, used_index * SECTORS_PER_PAGE + i,
(uint8_t *) frame + i * BLOCK_SECTOR_SIZE);
}
lock_release(&swap_lock);
}
static int psmx2_alloc_vlane(struct psmx2_fid_domain *domain, uint8_t *vl)
{
int i;
int id;
fastlock_acquire(&domain->vl_lock);
for (i=0; i<BITMAP_SIZE; i++) {
id = (domain->vl_alloc + i) % BITMAP_SIZE;
if (bitmap_test(domain->vl_map, id) == 0) {
bitmap_set(domain->vl_map, id);
domain->vl_alloc = id + 1;
break;
}
}
fastlock_release(&domain->vl_lock);
if (i >= BITMAP_SIZE)
return -FI_ENOSPC;
*vl = (uint8_t)id;
return 0;
}