NTSTATUS file_new(struct smb_request *req, connection_struct *conn,
files_struct **result)
{
int i;
files_struct *fsp;
NTSTATUS status;
/* we want to give out file handles differently on each new
connection because of a common bug in MS clients where they try to
reuse a file descriptor from an earlier smb connection. This code
increases the chance that the errant client will get an error rather
than causing corruption */
if (first_file == 0) {
first_file = (sys_getpid() ^ (int)time(NULL)) % real_max_open_files;
}
/* TODO: Port the id-tree implementation from Samba4 */
i = bitmap_find(file_bmap, first_file);
if (i == -1) {
DEBUG(0,("ERROR! Out of file structures\n"));
/* TODO: We have to unconditionally return a DOS error here,
* W2k3 even returns ERRDOS/ERRnofids for ntcreate&x with
* NTSTATUS negotiated */
return NT_STATUS_TOO_MANY_OPENED_FILES;
}
/*
* Make a child of the connection_struct as an fsp can't exist
* indepenedent of a connection.
*/
fsp = talloc_zero(conn, struct files_struct);
if (!fsp) {
return NT_STATUS_NO_MEMORY;
}
/*
* This can't be a child of fsp because the file_handle can be ref'd
* when doing a dos/fcb open, which will then share the file_handle
* across multiple fsps.
*/
fsp->fh = talloc_zero(conn, struct fd_handle);
if (!fsp->fh) {
TALLOC_FREE(fsp);
return NT_STATUS_NO_MEMORY;
}
fsp->fh->ref_count = 1;
fsp->fh->fd = -1;
fsp->conn = conn;
fsp->fh->gen_id = get_gen_count();
GetTimeOfDay(&fsp->open_time);
first_file = (i+1) % real_max_open_files;
bitmap_set(file_bmap, i);
files_used++;
fsp->fnum = i + FILE_HANDLE_OFFSET;
SMB_ASSERT(fsp->fnum < 65536);
/*
* Create an smb_filename with "" for the base_name. There are very
* few NULL checks, so make sure it's initialized with something. to
* be safe until an audit can be done.
*/
status = create_synthetic_smb_fname(fsp, "", NULL, NULL,
&fsp->fsp_name);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(fsp);
TALLOC_FREE(fsp->fh);
}
DLIST_ADD(Files, fsp);
DEBUG(5,("allocated file structure %d, fnum = %d (%d used)\n",
i, fsp->fnum, files_used));
if (req != NULL) {
req->chain_fsp = fsp;
}
/* A new fsp invalidates the positive and
negative fsp_fi_cache as the new fsp is pushed
at the start of the list and we search from
a cache hit to the *end* of the list. */
ZERO_STRUCT(fsp_fi_cache);
conn->num_files_open++;
*result = fsp;
return NT_STATUS_OK;
}
NTSTATUS file_new(struct smb_request *req, connection_struct *conn,
files_struct **result)
{
int i;
files_struct *fsp;
/* we want to give out file handles differently on each new
connection because of a common bug in MS clients where they try to
reuse a file descriptor from an earlier smb connection. This code
increases the chance that the errant client will get an error rather
than causing corruption */
if (first_file == 0) {
first_file = (sys_getpid() ^ (int)time(NULL)) % real_max_open_files;
}
/* TODO: Port the id-tree implementation from Samba4 */
i = bitmap_find(file_bmap, first_file);
if (i == -1) {
DEBUG(0,("ERROR! Out of file structures\n"));
/* TODO: We have to unconditionally return a DOS error here,
* W2k3 even returns ERRDOS/ERRnofids for ntcreate&x with
* NTSTATUS negotiated */
return NT_STATUS_TOO_MANY_OPENED_FILES;
}
fsp = SMB_MALLOC_P(files_struct);
if (!fsp) {
return NT_STATUS_NO_MEMORY;
}
ZERO_STRUCTP(fsp);
fsp->fh = SMB_MALLOC_P(struct fd_handle);
if (!fsp->fh) {
SAFE_FREE(fsp);
return NT_STATUS_NO_MEMORY;
}
ZERO_STRUCTP(fsp->fh);
fsp->fh->ref_count = 1;
fsp->fh->fd = -1;
fsp->conn = conn;
fsp->fh->gen_id = get_gen_count();
GetTimeOfDay(&fsp->open_time);
first_file = (i+1) % real_max_open_files;
bitmap_set(file_bmap, i);
files_used++;
fsp->fnum = i + FILE_HANDLE_OFFSET;
SMB_ASSERT(fsp->fnum < 65536);
string_set(&fsp->fsp_name,"");
DLIST_ADD(Files, fsp);
DEBUG(5,("allocated file structure %d, fnum = %d (%d used)\n",
i, fsp->fnum, files_used));
if (req != NULL) {
req->chain_fsp = fsp;
}
/* A new fsp invalidates the positive and
negative fsp_fi_cache as the new fsp is pushed
at the start of the list and we search from
a cache hit to the *end* of the list. */
ZERO_STRUCT(fsp_fi_cache);
conn->num_files_open++;
*result = fsp;
return NT_STATUS_OK;
}
