static status_t
iterative_io_get_vecs_hook(void *cookie, io_request *request, off_t offset,
size_t size, struct file_io_vec *vecs, size_t *count)
{
Icb *icb = (Icb *)cookie;
return file_map_translate(icb->FileMap(), offset, size, vecs, count,
icb->GetVolume()->BlockSize());
}
//! btrfs_io() callback hook
static status_t
iterative_io_get_vecs_hook(void* cookie, io_request* request, off_t offset,
size_t size, struct file_io_vec* vecs, size_t* _count)
{
Inode* inode = (Inode*)cookie;
return file_map_translate(inode->Map(), offset, size, vecs, _count,
inode->GetVolume()->BlockSize());
}
static status_t
ext2_write_pages(fs_volume* _volume, fs_vnode* _node, void* _cookie,
off_t pos, const iovec* vecs, size_t count, size_t* _numBytes)
{
Volume* volume = (Volume*)_volume->private_volume;
Inode* inode = (Inode*)_node->private_node;
if (volume->IsReadOnly())
return B_READ_ONLY_DEVICE;
if (inode->FileCache() == NULL)
return B_BAD_VALUE;
rw_lock_read_lock(inode->Lock());
uint32 vecIndex = 0;
size_t vecOffset = 0;
size_t bytesLeft = *_numBytes;
status_t status;
while (true) {
file_io_vec fileVecs[8];
size_t fileVecCount = 8;
status = file_map_translate(inode->Map(), pos, bytesLeft, fileVecs,
&fileVecCount, 0);
if (status != B_OK && status != B_BUFFER_OVERFLOW)
break;
bool bufferOverflow = status == B_BUFFER_OVERFLOW;
size_t bytes = bytesLeft;
status = write_file_io_vec_pages(volume->Device(), fileVecs,
fileVecCount, vecs, count, &vecIndex, &vecOffset, &bytes);
if (status != B_OK || !bufferOverflow)
break;
pos += bytes;
bytesLeft -= bytes;
}
rw_lock_read_unlock(inode->Lock());
return status;
}
