crc32_pclmul_le(u32 crc, unsigned char const *p, size_t len)
{
unsigned int iquotient;
unsigned int iremainder;
unsigned int prealign;
if (len < PCLMUL_MIN_LEN + SCALE_F_MASK || !irq_fpu_usable())
return crc32_le(crc, p, len);
if ((long)p & SCALE_F_MASK) {
/* align p to 16 byte */
prealign = SCALE_F - ((long)p & SCALE_F_MASK);
crc = crc32_le(crc, p, prealign);
len -= prealign;
p = (unsigned char *)(((unsigned long)p + SCALE_F_MASK) &
~SCALE_F_MASK);
}
iquotient = len & (~SCALE_F_MASK);
iremainder = len & SCALE_F_MASK;
kernel_fpu_begin();
crc = crc32_pclmul_le_16(p, iquotient, crc);
kernel_fpu_end();
if (iremainder)
crc = crc32_le(crc, p + iquotient, iremainder);
return crc;
}
/**
* calc_crc_cont - check CRC of blocks continuously
* @sbi: nilfs_sb_info
* @bhs: buffer head of start block
* @sum: place to store result
* @offset: offset bytes in the first block
* @check_bytes: number of bytes to be checked
* @start: DBN of start block
* @nblock: number of blocks to be checked
*/
static int calc_crc_cont(struct nilfs_sb_info *sbi, struct buffer_head *bhs,
u32 *sum, unsigned long offset, u64 check_bytes,
sector_t start, unsigned long nblock)
{
unsigned long blocksize = sbi->s_super->s_blocksize;
unsigned long size;
u32 crc;
BUG_ON(offset >= blocksize);
check_bytes -= offset;
size = min_t(u64, check_bytes, blocksize - offset);
crc = crc32_le(sbi->s_nilfs->ns_crc_seed,
(unsigned char *)bhs->b_data + offset, size);
if (--nblock > 0) {
do {
struct buffer_head *bh
= sb_bread(sbi->s_super, ++start);
if (!bh)
return -EIO;
check_bytes -= size;
size = min_t(u64, check_bytes, blocksize);
crc = crc32_le(crc, bh->b_data, size);
brelse(bh);
} while (--nblock > 0);
}
*sum = crc;
return 0;
}
/**
* nilfs_compute_checksum - compute checksum of blocks continuously
* @nilfs: nilfs object
* @bhs: buffer head of start block
* @sum: place to store result
* @offset: offset bytes in the first block
* @check_bytes: number of bytes to be checked
* @start: DBN of start block
* @nblock: number of blocks to be checked
*/
static int nilfs_compute_checksum(struct the_nilfs *nilfs,
struct buffer_head *bhs, u32 *sum,
unsigned long offset, u64 check_bytes,
sector_t start, unsigned long nblock)
{
unsigned int blocksize = nilfs->ns_blocksize;
unsigned long size;
u32 crc;
BUG_ON(offset >= blocksize);
check_bytes -= offset;
size = min_t(u64, check_bytes, blocksize - offset);
crc = crc32_le(nilfs->ns_crc_seed,
(unsigned char *)bhs->b_data + offset, size);
if (--nblock > 0) {
do {
struct buffer_head *bh;
bh = __bread(nilfs->ns_bdev, ++start, blocksize);
if (!bh)
return -EIO;
check_bytes -= size;
size = min_t(u64, check_bytes, blocksize);
crc = crc32_le(crc, bh->b_data, size);
brelse(bh);
} while (--nblock > 0);
}
*sum = crc;
return 0;
}
int nilfs_commit_super(struct super_block *sb, int flag)
{
struct the_nilfs *nilfs = sb->s_fs_info;
struct nilfs_super_block **sbp = nilfs->ns_sbp;
time_t t;
/* nilfs->ns_sem must be locked by the caller. */
t = get_seconds();
nilfs->ns_sbwtime = t;
sbp[0]->s_wtime = cpu_to_le64(t);
sbp[0]->s_sum = 0;
sbp[0]->s_sum = cpu_to_le32(crc32_le(nilfs->ns_crc_seed,
(unsigned char *)sbp[0],
nilfs->ns_sbsize));
if (flag == NILFS_SB_COMMIT_ALL && sbp[1]) {
sbp[1]->s_wtime = sbp[0]->s_wtime;
sbp[1]->s_sum = 0;
sbp[1]->s_sum = cpu_to_le32(crc32_le(nilfs->ns_crc_seed,
(unsigned char *)sbp[1],
nilfs->ns_sbsize));
}
clear_nilfs_sb_dirty(nilfs);
nilfs->ns_flushed_device = 1;
/* make sure store to ns_flushed_device cannot be reordered */
smp_wmb();
return nilfs_sync_super(sb, flag);
}
/* Compute a partial ICRC for all the IB transport headers. */
u32 rxe_icrc_hdr(struct rxe_pkt_info *pkt, struct sk_buff *skb)
{
unsigned int bth_offset = 0;
struct iphdr *ip4h = NULL;
struct ipv6hdr *ip6h = NULL;
struct udphdr *udph;
struct rxe_bth *bth;
int crc;
int length;
int hdr_size = sizeof(struct udphdr) +
(skb->protocol == htons(ETH_P_IP) ?
sizeof(struct iphdr) : sizeof(struct ipv6hdr));
/* pseudo header buffer size is calculate using ipv6 header size since
* it is bigger than ipv4
*/
u8 pshdr[sizeof(struct udphdr) +
sizeof(struct ipv6hdr) +
RXE_BTH_BYTES];
/* This seed is the result of computing a CRC with a seed of
* 0xfffffff and 8 bytes of 0xff representing a masked LRH.
*/
crc = 0xdebb20e3;
if (skb->protocol == htons(ETH_P_IP)) { /* IPv4 */
memcpy(pshdr, ip_hdr(skb), hdr_size);
ip4h = (struct iphdr *)pshdr;
udph = (struct udphdr *)(ip4h + 1);
ip4h->ttl = 0xff;
ip4h->check = CSUM_MANGLED_0;
ip4h->tos = 0xff;
} else { /* IPv6 */
memcpy(pshdr, ipv6_hdr(skb), hdr_size);
ip6h = (struct ipv6hdr *)pshdr;
udph = (struct udphdr *)(ip6h + 1);
memset(ip6h->flow_lbl, 0xff, sizeof(ip6h->flow_lbl));
ip6h->priority = 0xf;
ip6h->hop_limit = 0xff;
}
udph->check = CSUM_MANGLED_0;
bth_offset += hdr_size;
memcpy(&pshdr[bth_offset], pkt->hdr, RXE_BTH_BYTES);
bth = (struct rxe_bth *)&pshdr[bth_offset];
/* exclude bth.resv8a */
bth->qpn |= cpu_to_be32(~BTH_QPN_MASK);
length = hdr_size + RXE_BTH_BYTES;
crc = crc32_le(crc, pshdr, length);
/* And finish to compute the CRC on the remainder of the headers. */
crc = crc32_le(crc, pkt->hdr + RXE_BTH_BYTES,
rxe_opcode[pkt->opcode].length - RXE_BTH_BYTES);
return crc;
}
uint32_t Item::calculateCrc32WithoutValue() const
{
uint32_t result = 0xffffffff;
const uint8_t* p = reinterpret_cast<const uint8_t*>(this);
result = crc32_le(result, p + offsetof(Item, nsIndex),
offsetof(Item, datatype) - offsetof(Item, nsIndex));
result = crc32_le(result, p + offsetof(Item, key), sizeof(key));
return result;
}
/*
* This function validates existing check information. Like _compute,
* the function will take care of zeroing bc before calculating check codes.
* If bc is not a pointer inside data, the caller must have zeroed any
* inline ocfs2_block_check structures.
*
* Again, the data passed in should be the on-disk endian.
*/
int ocfs2_block_check_validate(void *data, size_t blocksize,
struct ocfs2_block_check *bc,
struct ocfs2_blockcheck_stats *stats)
{
int rc = 0;
u32 bc_crc32e;
u16 bc_ecc;
u32 crc, ecc;
ocfs2_blockcheck_inc_check(stats);
bc_crc32e = le32_to_cpu(bc->bc_crc32e);
bc_ecc = le16_to_cpu(bc->bc_ecc);
memset(bc, 0, sizeof(struct ocfs2_block_check));
/* Fast path - if the crc32 validates, we're good to go */
crc = crc32_le(~0, data, blocksize);
if (crc == bc_crc32e)
goto out;
ocfs2_blockcheck_inc_failure(stats);
mlog(ML_ERROR,
"CRC32 failed: stored: 0x%x, computed 0x%x. Applying ECC.\n",
(unsigned int)bc_crc32e, (unsigned int)crc);
/* Ok, try ECC fixups */
ecc = ocfs2_hamming_encode_block(data, blocksize);
ocfs2_hamming_fix_block(data, blocksize, ecc ^ bc_ecc);
/* And check the crc32 again */
crc = crc32_le(~0, data, blocksize);
if (crc == bc_crc32e) {
ocfs2_blockcheck_inc_recover(stats);
goto out;
}
mlog(ML_ERROR, "Fixed CRC32 failed: stored: 0x%x, computed 0x%x\n",
(unsigned int)bc_crc32e, (unsigned int)crc);
rc = -EIO;
out:
bc->bc_crc32e = cpu_to_le32(bc_crc32e);
bc->bc_ecc = cpu_to_le16(bc_ecc);
return rc;
}
/*
* This function generates check information for a list of buffer_heads.
* bhs is the blocks to be checked. bc is a pointer to the
* ocfs2_block_check structure describing the crc32 and the ecc.
*
* bc should be a pointer inside data, as the function will
* take care of zeroing it before calculating the check information. If
* bc does not point inside data, the caller must make sure any inline
* ocfs2_block_check structures are zeroed.
*
* The data buffer must be in on-disk endian (little endian for ocfs2).
* bc will be filled with little-endian values and will be ready to go to
* disk.
*/
void ocfs2_block_check_compute_bhs(struct buffer_head **bhs, int nr,
struct ocfs2_block_check *bc)
{
int i;
u32 crc, ecc;
BUG_ON(nr < 0);
if (!nr)
return;
memset(bc, 0, sizeof(struct ocfs2_block_check));
for (i = 0, crc = ~0, ecc = 0; i < nr; i++) {
crc = crc32_le(crc, bhs[i]->b_data, bhs[i]->b_size);
/*
* The number of bits in a buffer is obviously b_size*8.
* The offset of this buffer is b_size*i, so the bit offset
* of this buffer is b_size*8*i.
*/
ecc = (u16)ocfs2_hamming_encode(ecc, bhs[i]->b_data,
bhs[i]->b_size * 8,
bhs[i]->b_size * 8 * i);
}
/*
* No ecc'd ocfs2 structure is larger than 4K, so ecc will be no
* larger than 16 bits.
*/
BUG_ON(ecc > USHRT_MAX);
bc->bc_crc32e = cpu_to_le32(crc);
bc->bc_ecc = cpu_to_le16((u16)ecc);
}
/*
* opa_vnic_mac_send_event - post event on possible mac list exchange
* Send trap when digest from uc/mc mac list differs from previous run.
* Digest is evaluated similar to how cksum does.
*/
static void opa_vnic_mac_send_event(struct net_device *netdev, u8 event)
{
struct opa_vnic_adapter *adapter = opa_vnic_priv(netdev);
struct netdev_hw_addr *ha;
struct netdev_hw_addr_list *hw_list;
u32 *ref_crc;
u32 l, crc = 0;
switch (event) {
case OPA_VESWPORT_TRAP_IFACE_UCAST_MAC_CHANGE:
hw_list = &netdev->uc;
adapter->info.vport.uc_macs_gen_count++;
ref_crc = &adapter->umac_hash;
break;
case OPA_VESWPORT_TRAP_IFACE_MCAST_MAC_CHANGE:
hw_list = &netdev->mc;
adapter->info.vport.mc_macs_gen_count++;
ref_crc = &adapter->mmac_hash;
break;
default:
return;
}
netdev_hw_addr_list_for_each(ha, hw_list) {
crc = crc32_le(crc, ha->addr, ETH_ALEN);
}
static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size)
{
bool ret = false;
u32 reg;
void *addr;
dma_addr_t phys_addr;
struct pci_dev *pdev = test->pdev;
struct device *dev = &pdev->dev;
void *orig_addr;
dma_addr_t orig_phys_addr;
size_t offset;
size_t alignment = test->alignment;
u32 crc32;
orig_addr = dma_alloc_coherent(dev, size + alignment, &orig_phys_addr,
GFP_KERNEL);
if (!orig_addr) {
dev_err(dev, "failed to allocate address\n");
ret = false;
goto err;
}
if (alignment && !IS_ALIGNED(orig_phys_addr, alignment)) {
phys_addr = PTR_ALIGN(orig_phys_addr, alignment);
offset = phys_addr - orig_phys_addr;
addr = orig_addr + offset;
} else {
phys_addr = orig_phys_addr;
addr = orig_addr;
}
get_random_bytes(addr, size);
crc32 = crc32_le(~0, addr, size);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_CHECKSUM,
crc32);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_LOWER_SRC_ADDR,
lower_32_bits(phys_addr));
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_UPPER_SRC_ADDR,
upper_32_bits(phys_addr));
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_SIZE, size);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_COMMAND,
1 << MSI_NUMBER_SHIFT | COMMAND_READ);
wait_for_completion(&test->irq_raised);
reg = pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_STATUS);
if (reg & STATUS_READ_SUCCESS)
ret = true;
dma_free_coherent(dev, size + alignment, orig_addr, orig_phys_addr);
err:
return ret;
}
static int o2cb_cluster_connect(struct ocfs2_cluster_connection *conn)
{
int rc = 0;
u32 dlm_key;
struct dlm_ctxt *dlm;
struct o2dlm_private *priv;
struct dlm_protocol_version fs_version;
BUG_ON(conn == NULL);
BUG_ON(conn->cc_proto == NULL);
/* for now we only have one cluster/node, make sure we see it
* in the heartbeat universe */
if (!o2hb_check_local_node_heartbeating()) {
if (o2hb_global_heartbeat_active())
mlog(ML_ERROR, "Global heartbeat not started\n");
rc = -EINVAL;
goto out;
}
priv = kzalloc(sizeof(struct o2dlm_private), GFP_KERNEL);
if (!priv) {
rc = -ENOMEM;
goto out_free;
}
/* This just fills the structure in. It is safe to pass conn. */
dlm_setup_eviction_cb(&priv->op_eviction_cb, o2dlm_eviction_cb,
conn);
conn->cc_private = priv;
/* used by the dlm code to make message headers unique, each
* node in this domain must agree on this. */
dlm_key = crc32_le(0, conn->cc_name, conn->cc_namelen);
fs_version.pv_major = conn->cc_version.pv_major;
fs_version.pv_minor = conn->cc_version.pv_minor;
dlm = dlm_register_domain(conn->cc_name, dlm_key, &fs_version);
if (IS_ERR(dlm)) {
rc = PTR_ERR(dlm);
mlog_errno(rc);
goto out_free;
}
conn->cc_version.pv_major = fs_version.pv_major;
conn->cc_version.pv_minor = fs_version.pv_minor;
conn->cc_lockspace = dlm;
dlm_register_eviction_cb(dlm, &priv->op_eviction_cb);
out_free:
if (rc && conn->cc_private)
kfree(conn->cc_private);
out:
return rc;
}
static int o2cb_cluster_connect(struct ocfs2_cluster_connection *conn)
{
int rc = 0;
u32 dlm_key;
struct dlm_ctxt *dlm;
struct o2dlm_private *priv;
struct dlm_protocol_version fs_version;
BUG_ON(conn == NULL);
BUG_ON(conn->cc_proto == NULL);
/* Ensure cluster stack is up and all nodes are connected */
rc = o2cb_cluster_check();
if (rc) {
printk(KERN_ERR "o2cb: Cluster check failed. Fix errors "
"before retrying.\n");
goto out;
}
priv = kzalloc(sizeof(struct o2dlm_private), GFP_KERNEL);
if (!priv) {
rc = -ENOMEM;
goto out_free;
}
/* This just fills the structure in. It is safe to pass conn. */
dlm_setup_eviction_cb(&priv->op_eviction_cb, o2dlm_eviction_cb,
conn);
conn->cc_private = priv;
/* used by the dlm code to make message headers unique, each
* node in this domain must agree on this. */
dlm_key = crc32_le(0, conn->cc_name, conn->cc_namelen);
fs_version.pv_major = conn->cc_version.pv_major;
fs_version.pv_minor = conn->cc_version.pv_minor;
dlm = dlm_register_domain(conn->cc_name, dlm_key, &fs_version);
if (IS_ERR(dlm)) {
rc = PTR_ERR(dlm);
mlog_errno(rc);
goto out_free;
}
conn->cc_version.pv_major = fs_version.pv_major;
conn->cc_version.pv_minor = fs_version.pv_minor;
conn->cc_lockspace = dlm;
dlm_register_eviction_cb(dlm, &priv->op_eviction_cb);
out_free:
if (rc && conn->cc_private)
kfree(conn->cc_private);
out:
return rc;
}
static uint32_t nilfs_sb_check_sum(struct nilfs_super_block *sbp)
{
uint32_t seed, crc;
__le32 sum;
seed = le32_to_cpu(sbp->s_crc_seed);
sum = sbp->s_sum;
sbp->s_sum = 0;
crc = crc32_le(seed, (unsigned char *)sbp, le16_to_cpu(sbp->s_bytes));
sbp->s_sum = sum;
return crc;
}
/**
* s3c_pm_runcheck() - helper to check a resource on restore.
* @res: The resource to check
* @vak: Pointer to list of CRC32 values to check.
*
* Called from the s3c_pm_check_restore() via s3c_pm_run_sysram(), this
* function runs the given memory resource checking it against the stored
* CRC to ensure that memory is restored. The function tries to skip as
* many of the areas used during the suspend process.
*/
static u32 *s3c_pm_runcheck(struct resource *res, u32 *val)
{
void *save_at = phys_to_virt(s3c_sleep_save_phys);
unsigned long addr;
unsigned long left;
void *stkpage;
void *ptr;
u32 calc;
stkpage = (void *)((u32)&calc & ~PAGE_MASK);
for (addr = res->start; addr < res->end;
addr += CHECK_CHUNKSIZE) {
left = res->end - addr;
if (left > CHECK_CHUNKSIZE)
left = CHECK_CHUNKSIZE;
ptr = phys_to_virt(addr);
if (in_region(ptr, left, stkpage, 4096)) {
S3C_PMDBG("skipping %08lx, has stack in\n", addr);
goto skip_check;
}
if (in_region(ptr, left, crcs, crc_size)) {
S3C_PMDBG("skipping %08lx, has crc block in\n", addr);
goto skip_check;
}
if (in_region(ptr, left, save_at, 32*4 )) {
S3C_PMDBG("skipping %08lx, has save block in\n", addr);
goto skip_check;
}
/* calculate and check the checksum */
calc = crc32_le(~0, ptr, left);
if (calc != *val) {
printk(KERN_ERR "Restore CRC error at "
"%08lx (%08x vs %08x)\n", addr, calc, *val);
S3C_PMDBG("Restore CRC error at %08lx (%08x vs %08x)\n",
addr, calc, *val);
}
skip_check:
val++;
}
return val;
}
int cCardCryptoworks::Assemble(cAssembleData *ad)
{
const unsigned char *data=ad->Data();
int len=SCT_LEN(data);
switch(data[0]) {
case 0x82:
return 0; // no assemble needed
case 0x84:
free(sharedEmm);
sharedEmm=(unsigned char *)malloc(len);
if(sharedEmm) {
memcpy(sharedEmm,data,len);
sharedLen=len;
}
break;
case 0x86:
if(sharedEmm) {
int alen=len-5 + sharedLen-12;
unsigned char *tmp=AUTOMEM(alen);
memcpy(tmp,&data[5],len-5);
memcpy(tmp+len-5,&sharedEmm[12],sharedLen-12);
unsigned char *ass=(unsigned char *)malloc(alen+12);
if(!ass) return -1; // ignore
memcpy(ass,sharedEmm,12);
SortNanos(ass+12,tmp,alen);
SetSctLen(ass,alen+9);
free(sharedEmm); sharedEmm=0;
if(ass[11]==alen) { // sanity check
ad->SetAssembled(ass);
return 1; // assembled
}
}
break;
case 0x88:
case 0x89:
if(data[0]!=globalToggle) {
globalToggle=data[0];
unsigned int crc=crc32_le(0,data+1,len-1);
if(crc!=globalCrc) {
globalCrc=crc;
return 0; // no assemble needed
}
}
break;
}
return -1; // ignore
}
int nilfs_commit_super(struct nilfs_sb_info *sbi, int flag)
{
struct the_nilfs *nilfs = sbi->s_nilfs;
struct nilfs_super_block **sbp = nilfs->ns_sbp;
time_t t;
/* nilfs->ns_sem must be locked by the caller. */
t = get_seconds();
nilfs->ns_sbwtime = t;
sbp[0]->s_wtime = cpu_to_le64(t);
sbp[0]->s_sum = 0;
sbp[0]->s_sum = cpu_to_le32(crc32_le(nilfs->ns_crc_seed,
(unsigned char *)sbp[0],
nilfs->ns_sbsize));
if (flag == NILFS_SB_COMMIT_ALL && sbp[1]) {
sbp[1]->s_wtime = sbp[0]->s_wtime;
sbp[1]->s_sum = 0;
sbp[1]->s_sum = cpu_to_le32(crc32_le(nilfs->ns_crc_seed,
(unsigned char *)sbp[1],
nilfs->ns_sbsize));
}
clear_nilfs_sb_dirty(nilfs);
return nilfs_sync_super(sbi, flag);
}
/*
* When page is being changed by the kernel, we must update the dedup structure:
* 1. unlink changed block from equal blocks
* 2. calculate new hash and crc
* 3. link to new equal blocks (if exists)
*/
int dedup_update_page_changed(sector_t block, char* block_data)
{
size_t block_size = dedup_get_block_size();
sector_t currblock, equal_block;
// Todo: add support if there is more than 1 block in page - check them all
if (!dedup_is_in_range(block)) {
trace_printk("block not in range %ld", block);
return 0;
}
block = block - start_block;
equal_block = block;
trace_printk("page is being updated : block = %ld\n", block);
// Remove from dedup structure
dedup_remove_block_duplication(block);
// Calc hash
calc_hash(block_data, block_size, blocksArray.hashes[block]);
// Calc crc32
blocksArray.hash_crc[block] = crc32_le(0, blocksArray.hashes[block], SHA256_DIGEST_SIZE);
// Go over other blocks
for (currblock = 0; currblock < blocks_count; ++currblock) {
// If blocks equal, update dedup structure
if (currblock != block) {
// first, compare crc - should be faster
if (blocksArray.hash_crc[currblock] == blocksArray.hash_crc[block]){
// If hash array is NULL then there is a block at lower index
// that is equal to this block and it was already compared to.
if (blocksArray.hashes[currblock] && blocksArray.hashes[block] &&
memcmp(blocksArray.hashes[currblock], blocksArray.hashes[block], SHA256_DIGEST_SIZE) == 0)
{
equal_block = currblock;
break;
}
}
}
}
if (block != equal_block) {
trace_printk("found new duplicated block ! %ld = %ld\n", block + start_block, equal_block + start_block);
dedup_set_block_duplication(equal_block, block);
}
return 0;
}
/**
* msm_eeprom_verify_sum - verify crc32 checksum
* @mem: data buffer
* @size: size of data buffer
* @sum: expected checksum
*
* Returns 0 if checksum match, -EINVAL otherwise.
*/
static int msm_eeprom_verify_sum(const char *mem, uint32_t size, uint32_t sum)
{
uint32_t crc = ~0UL;
/* check overflow */
if (size > crc - sizeof(uint32_t))
return -EINVAL;
crc = crc32_le(crc, mem, size);
if (~crc != sum) {
CDBG("%s: expect 0x%x, result 0x%x\n", __func__, sum, ~crc);
return -EINVAL;
}
CDBG("%s: checksum pass 0x%x\n", __func__, sum);
return 0;
}
static u32 *s3c_pm_makecheck(struct resource *res, u32 *val)
{
unsigned long addr, left;
for (addr = res->start; addr < res->end;
addr += CHECK_CHUNKSIZE) {
left = res->end - addr;
if (left > CHECK_CHUNKSIZE)
left = CHECK_CHUNKSIZE;
*val = crc32_le(~0, phys_to_virt(addr), left);
val++;
}
return val;
}
int tegra_nct_read_item(u32 index, union nct_item_type *buf)
{
struct nct_entry_type *entry = NULL;
u8 *nct;
#if USE_CRC32_IN_NCT
u32 crc = 0;
#endif
if (!tegra_nct_initialized)
return -EPERM;
entry = kmalloc(sizeof(struct nct_entry_type), GFP_KERNEL);
if (!entry) {
pr_err("%s: failed to allocate buffer\n", __func__);
return -ENOMEM;
}
nct = (u8 *)(nct_ptr + NCT_ENTRY_OFFSET +
(index * sizeof(*entry)));
memcpy((u8 *)entry, nct, sizeof(*entry));
/* check CRC integrity */
#if USE_CRC32_IN_NCT
/* last checksum field of entry is not included in CRC calculation */
crc = crc32_le(~0, (u8 *)entry, sizeof(*entry) -
sizeof(entry->checksum)) ^ ~0;
if (crc != entry->checksum) {
pr_err("%s: checksum err(0x%x/0x%x)\n", __func__,
crc, entry->checksum);
kfree(entry);
return -EINVAL;
}
#endif
/* check index integrity */
if (index != entry->index) {
pr_err("%s: index err(0x%x/0x%x)\n", __func__,
index, entry->index);
kfree(entry);
return -EINVAL;
}
memcpy(buf, &entry->data, sizeof(*buf));
kfree(entry);
return 0;
}
int nilfs_commit_super(struct nilfs_sb_info *sbi, int dupsb)
{
struct the_nilfs *nilfs = sbi->s_nilfs;
struct nilfs_super_block **sbp = nilfs->ns_sbp;
sector_t nfreeblocks;
time_t t;
int err;
/* nilfs->sem must be locked by the caller. */
nilfs_debug(2, "called\n");
if (sbp[0]->s_magic != NILFS_SUPER_MAGIC) {
if (sbp[1] && sbp[1]->s_magic == NILFS_SUPER_MAGIC)
nilfs_swap_super_block(nilfs);
else {
printk(KERN_CRIT "NILFS: superblock broke on dev %s\n",
sbi->s_super->s_id);
return -EIO;
}
}
err = nilfs_count_free_blocks(nilfs, &nfreeblocks);
if (unlikely(err)) {
printk(KERN_ERR "NILFS: failed to count free blocks\n");
return err;
}
spin_lock(&nilfs->ns_last_segment_lock);
sbp[0]->s_last_seq = cpu_to_le64(nilfs->ns_last_seq);
sbp[0]->s_last_pseg = cpu_to_le64(nilfs->ns_last_pseg);
sbp[0]->s_last_cno = cpu_to_le64(nilfs->ns_last_cno);
spin_unlock(&nilfs->ns_last_segment_lock);
t = get_seconds();
nilfs->ns_sbwtime[0] = t;
sbp[0]->s_free_blocks_count = cpu_to_le64(nfreeblocks);
sbp[0]->s_wtime = cpu_to_le64(t);
sbp[0]->s_sum = 0;
sbp[0]->s_sum = cpu_to_le32(crc32_le(nilfs->ns_crc_seed,
(unsigned char *)sbp[0],
nilfs->ns_sbsize));
if (dupsb && sbp[1]) {
memcpy(sbp[1], sbp[0], nilfs->ns_sbsize);
nilfs->ns_sbwtime[1] = t;
}
sbi->s_super->s_dirt = 0;
return nilfs_sync_super(sbi, dupsb);
}
/*
* This function generates check information for a block.
* data is the block to be checked. bc is a pointer to the
* ocfs2_block_check structure describing the crc32 and the ecc.
*
* bc should be a pointer inside data, as the function will
* take care of zeroing it before calculating the check information. If
* bc does not point inside data, the caller must make sure any inline
* ocfs2_block_check structures are zeroed.
*
* The data buffer must be in on-disk endian (little endian for ocfs2).
* bc will be filled with little-endian values and will be ready to go to
* disk.
*/
void ocfs2_block_check_compute(void *data, size_t blocksize,
struct ocfs2_block_check *bc)
{
u32 crc;
u32 ecc;
memset(bc, 0, sizeof(struct ocfs2_block_check));
crc = crc32_le(~0, data, blocksize);
ecc = ocfs2_hamming_encode_block(data, blocksize);
/*
* No ecc'd ocfs2 structure is larger than 4K, so ecc will be no
* larger than 16 bits.
*/
BUG_ON(ecc > USHRT_MAX);
bc->bc_crc32e = cpu_to_le32(crc);
bc->bc_ecc = cpu_to_le16((u16)ecc);
}
int dtsec_add_hash_mac_address(struct fman_mac *dtsec, enet_addr_t *eth_addr)
{
struct dtsec_regs __iomem *regs = dtsec->regs;
struct eth_hash_entry *hash_entry;
u64 addr;
s32 bucket;
u32 crc = 0xFFFFFFFF;
bool mcast, ghtx;
if (!is_init_done(dtsec->dtsec_drv_param))
return -EINVAL;
addr = ENET_ADDR_TO_UINT64(*eth_addr);
ghtx = (bool)((ioread32be(®s->rctrl) & RCTRL_GHTX) ? true : false);
mcast = (bool)((addr & MAC_GROUP_ADDRESS) ? true : false);
/* Cannot handle unicast mac addr when GHTX is on */
if (ghtx && !mcast) {
pr_err("Could not compute hash bucket\n");
return -EINVAL;
}
crc = crc32_le(crc, (u8 *)eth_addr, ETH_ALEN);
crc = bitrev32(crc);
/* considering the 9 highest order bits in crc H[8:0]:
*if ghtx = 0 H[8:6] (highest order 3 bits) identify the hash register
*and H[5:1] (next 5 bits) identify the hash bit
*if ghts = 1 H[8:5] (highest order 4 bits) identify the hash register
*and H[4:0] (next 5 bits) identify the hash bit.
*
*In bucket index output the low 5 bits identify the hash register
*bit, while the higher 4 bits identify the hash register
*/
if (ghtx) {
bucket = (s32)((crc >> 23) & 0x1ff);
} else {
static int do_bulk_checksum_crc32(struct ptlrpc_bulk_desc *desc, void *buf)
{
struct page *page;
int off;
char *ptr;
__u32 crc32 = ~0;
int len, i;
for (i = 0; i < desc->bd_iov_count; i++) {
page = desc->bd_iov[i].kiov_page;
off = desc->bd_iov[i].kiov_offset & ~CFS_PAGE_MASK;
ptr = cfs_kmap(page) + off;
len = desc->bd_iov[i].kiov_len;
crc32 = crc32_le(crc32, ptr, len);
cfs_kunmap(page);
}
crc32 = cpu_to_le32(crc32);
memcpy(buf, &crc32, sizeof(crc32));
return 0;
}
/*
* Update dedup structure with block's hash and crc
*/
void dedup_calc_block_hash_crc(sector_t block)
{
size_t block_size = dedup_get_block_size();
char *block_data;
if (block >= blocks_count)
// outside dedup range
return;
block_data = (char*)kmalloc(block_size, GFP_KERNEL);
if (block_data == NULL) {
printk(KERN_ERR "failed allocating block data buffer.\n");
return;
}
// Read block
read_block(block_data, block_size, start_block + block);
// Calc hash
calc_hash(block_data, block_size, blocksArray.hashes[block]);
// Calc crc32
blocksArray.hash_crc[block] = crc32_le(0, blocksArray.hashes[block], SHA256_DIGEST_SIZE);
kfree(block_data);
}
int sptlrpc_get_bulk_checksum(struct ptlrpc_bulk_desc *desc, __u8 alg,
void *buf, int buflen)
{
__u32 csum32;
int i;
LASSERT(alg == BULK_HASH_ALG_ADLER32 || alg == BULK_HASH_ALG_CRC32);
if (alg == BULK_HASH_ALG_ADLER32)
csum32 = 1;
else
csum32 = ~0;
for (i = 0; i < desc->bd_iov_count; i++) {
unsigned char *ptr = desc->bd_iov[i].iov_base;
int len = desc->bd_iov[i].iov_len;
switch (alg) {
case BULK_HASH_ALG_ADLER32:
#ifdef HAVE_ADLER
csum32 = adler32(csum32, ptr, len);
#else
CERROR("Adler32 not supported\n");
return -EINVAL;
#endif
break;
case BULK_HASH_ALG_CRC32:
csum32 = crc32_le(csum32, ptr, len);
break;
}
}
csum32 = cpu_to_le32(csum32);
memcpy(buf, &csum32, sizeof(csum32));
return 0;
}
struct dlm_ctxt *user_dlm_register_context(struct qstr *name,
struct dlm_protocol_version *proto)
{
struct dlm_ctxt *dlm;
u32 dlm_key;
char *domain;
domain = kmalloc(name->len + 1, GFP_NOFS);
if (!domain) {
mlog_errno(-ENOMEM);
return ERR_PTR(-ENOMEM);
}
dlm_key = crc32_le(0, name->name, name->len);
snprintf(domain, name->len + 1, "%.*s", name->len, name->name);
dlm = dlm_register_domain(domain, dlm_key, proto);
if (IS_ERR(dlm))
mlog_errno(PTR_ERR(dlm));
kfree(domain);
return dlm;
}
static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)
{
bool ret = false;
void *src_addr;
void *dst_addr;
dma_addr_t src_phys_addr;
dma_addr_t dst_phys_addr;
struct pci_dev *pdev = test->pdev;
struct device *dev = &pdev->dev;
void *orig_src_addr;
dma_addr_t orig_src_phys_addr;
void *orig_dst_addr;
dma_addr_t orig_dst_phys_addr;
size_t offset;
size_t alignment = test->alignment;
u32 src_crc32;
u32 dst_crc32;
orig_src_addr = dma_alloc_coherent(dev, size + alignment,
&orig_src_phys_addr, GFP_KERNEL);
if (!orig_src_addr) {
dev_err(dev, "failed to allocate source buffer\n");
ret = false;
goto err;
}
if (alignment && !IS_ALIGNED(orig_src_phys_addr, alignment)) {
src_phys_addr = PTR_ALIGN(orig_src_phys_addr, alignment);
offset = src_phys_addr - orig_src_phys_addr;
src_addr = orig_src_addr + offset;
} else {
src_phys_addr = orig_src_phys_addr;
src_addr = orig_src_addr;
}
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_LOWER_SRC_ADDR,
lower_32_bits(src_phys_addr));
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_UPPER_SRC_ADDR,
upper_32_bits(src_phys_addr));
get_random_bytes(src_addr, size);
src_crc32 = crc32_le(~0, src_addr, size);
orig_dst_addr = dma_alloc_coherent(dev, size + alignment,
&orig_dst_phys_addr, GFP_KERNEL);
if (!orig_dst_addr) {
dev_err(dev, "failed to allocate destination address\n");
ret = false;
goto err_orig_src_addr;
}
if (alignment && !IS_ALIGNED(orig_dst_phys_addr, alignment)) {
dst_phys_addr = PTR_ALIGN(orig_dst_phys_addr, alignment);
offset = dst_phys_addr - orig_dst_phys_addr;
dst_addr = orig_dst_addr + offset;
} else {
dst_phys_addr = orig_dst_phys_addr;
dst_addr = orig_dst_addr;
}
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_LOWER_DST_ADDR,
lower_32_bits(dst_phys_addr));
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_UPPER_DST_ADDR,
upper_32_bits(dst_phys_addr));
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_SIZE,
size);
pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_COMMAND,
1 << MSI_NUMBER_SHIFT | COMMAND_COPY);
wait_for_completion(&test->irq_raised);
dst_crc32 = crc32_le(~0, dst_addr, size);
if (dst_crc32 == src_crc32)
ret = true;
dma_free_coherent(dev, size + alignment, orig_dst_addr,
orig_dst_phys_addr);
err_orig_src_addr:
dma_free_coherent(dev, size + alignment, orig_src_addr,
orig_src_phys_addr);
err:
return ret;
}
uint32_t bootloader_common_ota_select_crc(const esp_ota_select_entry_t *s)
{
return crc32_le(UINT32_MAX, (uint8_t*)&s->ota_seq, 4);
}
static u32 __crc32_le(u32 crc, unsigned char const *p, size_t len)
{
return crc32_le(crc, p, len);
}
