DWORD open_files(void)
{
datafile = CreateFile(
DATA_FILE,
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN,
NULL);
lasterror = check_file_handle(datafile);
if (lasterror != ERROR_SUCCESS)
return (int)lasterror;
solutionfile = CreateFile(
SOLUTION_FILE,
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN,
NULL);
lasterror = check_file_handle(solutionfile);
if (lasterror != ERROR_SUCCESS)
return (int)lasterror;
datamap =
CreateFileMapping(datafile, NULL, PAGE_READONLY, 0, 0, NULL);
lasterror = GetLastError();
if (datamap == NULL || lasterror != ERROR_SUCCESS)
return (int)lasterror;
solutionmap =
CreateFileMapping(solutionfile, NULL, PAGE_READONLY, 0, 0, NULL);
lasterror = GetLastError();
if (solutionmap == NULL || lasterror != ERROR_SUCCESS)
return (int)lasterror;
return ERROR_SUCCESS;
}
void
check_file (const char *file_name, const void *buf, size_t size)
{
int fd;
CHECK ((fd = open (file_name)) > 1, "open \"%s\" for verification",
file_name);
check_file_handle (fd, file_name, buf, size);
msg ("close \"%s\"", file_name);
close (fd);
}
static bool_t L1_Translate_m (USDCallback_cl *self,
USD_StreamID sid /* IN */,
USD_ClientID cid /* IN */,
const FileIO_Request *req /* IN */,
USD_Extent *extent /* OUT */,
uint32_t *notification /* OUT */)
{
L1_st *l1_st = self->st;
ext2fs_st *st = l1_st->ext2fs_st;
Client_st *cur;
Ext2_Handle handle;
struct inode *ino;
bool_t rc;
FTRC("entered: self=%p, st=%p.\n", self, st);
if (req->op != FileIO_Op_Read) ntsc_dbgstop();
/* ClientID is actually a pointer to our per-client state record */
/* This is securely provided by USD and so can be trusted. */
cur = (Client_st *)(word_t)cid;
if (req->nblocks == 0) {
/* Prefetch */
uint32_t dummy;
rc = USDCallback$Translate(l1_st->l2_callback,
sid, cid, req, extent, &dummy);
return False;
}
/* req->user1 should be the EXT2 handle - needs to be checked */
handle = req->user1;
/* Optimise out the callback for small files */
if (!check_file_handle(cur, handle))
return False;
ino = cur->handles[handle].ino;
if (S_ISDIR(ino->i_mode)) {
*notification = (word_t)ino;
} else {
*notification = 0;
}
if ((req->blockno + req->nblocks) <= EXT2_NDIR_BLOCKS) {
rc = translate(st, ino, req, extent);
} else {
uint32_t dummy;
rc = USDCallback$Translate(l1_st->l2_callback,
sid, cid, req, extent, &dummy);
}
/* Reduce the transfer size to the max contig. len */
((FileIO_Request *)req)->nblocks = extent->len;
/* Scale by FS block size */
extent->base *= 2 /* XXX PRB: should use logical block size */;
extent->len *= 2;
FTRC("leaving, returning true.\n");
return rc;
}
