return (sysv_zone_t*)((char*)bh->b_data + bh->b_size);
}
-/*
- * Requires read_lock(&pointers_lock) or write_lock(&pointers_lock)
- */
static Indirect *get_branch(struct inode *inode,
int depth,
int offsets[],
bh = sb_bread(sb, block);
if (!bh)
goto failure;
+ read_lock(&pointers_lock);
if (!verify_chain(chain, p))
goto changed;
add_chain(++p, bh, (sysv_zone_t*)bh->b_data + *++offsets);
+ read_unlock(&pointers_lock);
if (!p->key)
goto no_block;
}
return NULL;
changed:
+ read_unlock(&pointers_lock);
brelse(bh);
*err = -EAGAIN;
goto no_block;
goto out;
reread:
- read_lock(&pointers_lock);
partial = get_branch(inode, depth, offsets, chain, &err);
- read_unlock(&pointers_lock);
/* Simplest case - block found, no allocation needed */
if (!partial) {
*top = 0;
for (k = depth; k > 1 && !offsets[k-1]; k--)
;
+ partial = get_branch(inode, k, offsets, chain, &err);
write_lock(&pointers_lock);
- partial = get_branch(inode, k, offsets, chain, &err);
if (!partial)
partial = chain + k-1;
/*