/* Sync one block full of indirect pointers and read it because we'll need it. */
static int sync_iblock (struct inode * inode, u32 * iblockp, int convert,
struct buffer_head * *bh, int wait)
{
int rc;
u32 tmp, block;
*bh = NULL;
block = tmp = *iblockp;
if (convert)
block = from_coh_ulong(block);
if (!block)
return 0;
rc = sync_block (inode, iblockp, convert, wait);
if (rc)
return rc;
*bh = sv_bread(inode->i_sb, inode->i_dev, block);
if (tmp != *iblockp) {
brelse(*bh);
*bh = NULL;
return 1;
}
if (!*bh)
return -1;
return 0;
}
/* synchronize and return pointers */
int sync_blockp(int blocksize_samples, csample_t **buffers_in, int *nsamples_ret, csample_t **buffersret, float *fracdiffs, float *phasediffs) {
const int skipfirst = conf.sync_end, skipfirst_sync = conf.sync_start;
float timediffs[NRECEIVERS_MAX] = {0};
int ri, ret;
csample_t *buffers[NRECEIVERS_MAX];
for(ri = 0; ri < nreceivers; ri++) {
buffers[ri] = buffers_in[ri] + skipfirst_sync;
}
blocksize_samples -= skipfirst_sync;
ret = sync_block(blocksize_samples, buffers, timediffs, phasediffs);
if(ret < 0) return ret;
*nsamples_ret = blocksize_samples - corrlen*4 - skipfirst;
for(ri = 0; ri < nreceivers; ri++) {
float td, td_int, td_frac;
td = timediffs[ri];
td_int = floor(td);
td_frac = td - td_int;
buffersret[ri] = buffers[ri] + corrlen*2 - (int)td_int + skipfirst;
fracdiffs[ri] = td_frac;
}
return 0;
}
static int sync_direct (struct inode * inode, int wait)
{
int i;
int rc, err = 0;
for (i = 0; i < EXT2_NDIR_BLOCKS; i++) {
rc = sync_block (inode, inode->u.ext2_i.i_data + i, wait);
if (rc > 0)
break;
if (rc)
err = rc;
}
return err;
}
static int sync_direct(struct inode *inode, int wait)
{
int i;
int rc, err = 0;
for (i = 0; i < 10; i++) {
rc = sync_block (inode, inode->u.sysv_i.i_data + i, 0, wait);
if (rc > 0)
break;
if (rc)
err = rc;
}
return err;
}
static int sync_direct(struct inode *inode, int wait)
{
int i;
int rc, err = 0;
for (i = 0; i < 7; i++) {
rc = sync_block(inode,
(unsigned short *) inode->u.qnx4_i.i_first_xtnt.xtnt_blk + i, wait);
if (rc > 0)
break;
if (rc)
err = rc;
}
return err;
}
static int sync_indirect (struct inode * inode, u32 * iblock, int wait)
{
int i;
struct buffer_head * ind_bh;
int rc, err = 0;
rc = sync_iblock (inode, iblock, &ind_bh, wait);
if (rc || !ind_bh)
return rc;
for (i = 0; i < addr_per_block; i++) {
rc = sync_block (inode,
((u32 *) ind_bh->b_data) + i,
wait);
if (rc > 0)
break;
if (rc)
err = rc;
}
brelse (ind_bh);
return err;
}
static int sync_iblock (struct inode * inode, u32 * iblock,
struct buffer_head ** bh, int wait)
{
int rc, tmp;
*bh = NULL;
tmp = *iblock;
if (!tmp)
return 0;
rc = sync_block (inode, iblock, wait);
if (rc)
return rc;
*bh = bread (inode->i_dev, tmp, blocksize);
if (tmp != *iblock) {
brelse (*bh);
*bh = NULL;
return 1;
}
if (!*bh)
return -1;
return 0;
}
static int sync_indirect(struct inode *inode, u32 *iblockp, int convert, int wait)
{
int i;
struct buffer_head * ind_bh;
int rc, err = 0;
struct super_block * sb;
rc = sync_iblock (inode, iblockp, convert, &ind_bh, wait);
if (rc || !ind_bh)
return rc;
sb = inode->i_sb;
for (i = 0; i < sb->sv_ind_per_block; i++) {
rc = sync_block (inode,
((u32 *) ind_bh->b_data) + i, sb->sv_convert,
wait);
if (rc > 0)
break;
if (rc)
err = rc;
}
brelse(ind_bh);
return err;
}