*/
#include "includes.h"
+#include "system/filesys.h"
+#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "../libcli/smb/smb_common.h"
+#include "libcli/security/security.h"
+#include "../lib/util/tevent_ntstatus.h"
+#include "rpc_server/srv_pipe_hnd.h"
+#include "lib/sys_rw_data.h"
static struct tevent_req *smbd_smb2_read_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbd_smb2_request *smb2req,
- uint32_t in_smbpid,
- uint64_t in_file_id_volatile,
+ struct files_struct *in_fsp,
uint32_t in_length,
uint64_t in_offset,
uint32_t in_minimum,
static void smbd_smb2_request_read_done(struct tevent_req *subreq);
NTSTATUS smbd_smb2_request_process_read(struct smbd_smb2_request *req)
{
- const uint8_t *inhdr;
+ struct smbXsrv_connection *xconn = req->xconn;
+ NTSTATUS status;
const uint8_t *inbody;
- int i = req->current_idx;
- size_t expected_body_size = 0x31;
- size_t body_size;
- uint32_t in_smbpid;
uint32_t in_length;
uint64_t in_offset;
uint64_t in_file_id_persistent;
uint64_t in_file_id_volatile;
+ struct files_struct *in_fsp;
uint32_t in_minimum_count;
uint32_t in_remaining_bytes;
struct tevent_req *subreq;
- inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
- if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
- return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
- }
-
- inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
-
- body_size = SVAL(inbody, 0x00);
- if (body_size != expected_body_size) {
- return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ status = smbd_smb2_request_verify_sizes(req, 0x31);
+ if (!NT_STATUS_IS_OK(status)) {
+ return smbd_smb2_request_error(req, status);
}
-
- in_smbpid = IVAL(inhdr, SMB2_HDR_PID);
+ inbody = SMBD_SMB2_IN_BODY_PTR(req);
in_length = IVAL(inbody, 0x04);
in_offset = BVAL(inbody, 0x08);
in_remaining_bytes = IVAL(inbody, 0x28);
/* check the max read size */
- if (in_length > lp_smb2_max_read()) {
- DEBUG(0,("here:%s: 0x%08X: 0x%08X\n",
- __location__, in_length, lp_smb2_max_read()));
+ if (in_length > xconn->smb2.server.max_read) {
+ DEBUG(2,("smbd_smb2_request_process_read: "
+ "client ignored max read: %s: 0x%08X: 0x%08X\n",
+ __location__, in_length, xconn->smb2.server.max_read));
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
- if (req->compat_chain_fsp) {
- /* skip check */
- } else if (in_file_id_persistent != in_file_id_volatile) {
+ status = smbd_smb2_request_verify_creditcharge(req, in_length);
+ if (!NT_STATUS_IS_OK(status)) {
+ return smbd_smb2_request_error(req, status);
+ }
+
+ in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
+ if (in_fsp == NULL) {
return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
}
- subreq = smbd_smb2_read_send(req,
- req->sconn->smb2.event_ctx,
- req,
- in_smbpid,
- in_file_id_volatile,
+ subreq = smbd_smb2_read_send(req, req->sconn->ev_ctx,
+ req, in_fsp,
in_length,
in_offset,
in_minimum_count,
}
tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
- return smbd_smb2_request_pending_queue(req, subreq);
+ return smbd_smb2_request_pending_queue(req, subreq, 500);
}
static void smbd_smb2_request_read_done(struct tevent_req *subreq)
{
struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
struct smbd_smb2_request);
- int i = req->current_idx;
- uint8_t *outhdr;
DATA_BLOB outbody;
DATA_BLOB outdyn;
uint8_t out_data_offset;
if (!NT_STATUS_IS_OK(status)) {
error = smbd_smb2_request_error(req, status);
if (!NT_STATUS_IS_OK(error)) {
- smbd_server_connection_terminate(req->sconn,
+ smbd_server_connection_terminate(req->xconn,
nt_errstr(error));
return;
}
out_data_offset = SMB2_HDR_BODY + 0x10;
- outhdr = (uint8_t *)req->out.vector[i].iov_base;
-
- outbody = data_blob_talloc(req->out.vector, NULL, 0x10);
+ outbody = smbd_smb2_generate_outbody(req, 0x10);
if (outbody.data == NULL) {
error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
if (!NT_STATUS_IS_OK(error)) {
- smbd_server_connection_terminate(req->sconn,
+ smbd_server_connection_terminate(req->xconn,
nt_errstr(error));
return;
}
error = smbd_smb2_request_done(req, outbody, &outdyn);
if (!NT_STATUS_IS_OK(error)) {
- smbd_server_connection_terminate(req->sconn,
+ smbd_server_connection_terminate(req->xconn,
nt_errstr(error));
return;
}
struct smbd_smb2_read_state {
struct smbd_smb2_request *smb2req;
+ struct smb_request *smbreq;
+ files_struct *fsp;
+ uint32_t in_length;
+ uint64_t in_offset;
+ uint32_t in_minimum;
+ DATA_BLOB out_headers;
+ uint8_t _out_hdr_buf[NBT_HDR_SIZE + SMB2_HDR_BODY + 0x10];
DATA_BLOB out_data;
uint32_t out_remaining;
};
+static int smb2_smb2_read_state_deny_destructor(struct smbd_smb2_read_state *state)
+{
+ return -1;
+}
+
+/* struct smbd_smb2_read_state destructor. Send the SMB2_READ data. */
+static int smb2_sendfile_send_data(struct smbd_smb2_read_state *state)
+{
+ struct lock_struct lock;
+ uint32_t in_length = state->in_length;
+ uint64_t in_offset = state->in_offset;
+ files_struct *fsp = state->fsp;
+ const DATA_BLOB *hdr = state->smb2req->queue_entry.sendfile_header;
+ NTSTATUS *pstatus = state->smb2req->queue_entry.sendfile_status;
+ struct smbXsrv_connection *xconn = state->smb2req->xconn;
+ ssize_t nread;
+ ssize_t ret;
+ int saved_errno;
+
+ nread = SMB_VFS_SENDFILE(xconn->transport.sock,
+ fsp,
+ hdr,
+ in_offset,
+ in_length);
+ DEBUG(10,("smb2_sendfile_send_data: SMB_VFS_SENDFILE returned %d on file %s\n",
+ (int)nread,
+ fsp_str_dbg(fsp) ));
+
+ if (nread == -1) {
+ saved_errno = errno;
+
+ /*
+ * Returning ENOSYS means no data at all was sent.
+ Do this as a normal read. */
+ if (errno == ENOSYS) {
+ goto normal_read;
+ }
+
+ if (errno == EINTR) {
+ /*
+ * Special hack for broken Linux with no working sendfile. If we
+ * return EINTR we sent the header but not the rest of the data.
+ * Fake this up by doing read/write calls.
+ */
+ set_use_sendfile(SNUM(fsp->conn), false);
+ nread = fake_sendfile(xconn, fsp, in_offset, in_length);
+ if (nread == -1) {
+ saved_errno = errno;
+ DEBUG(0,("smb2_sendfile_send_data: fake_sendfile "
+ "failed for file %s (%s) for client %s. "
+ "Terminating\n",
+ fsp_str_dbg(fsp), strerror(saved_errno),
+ smbXsrv_connection_dbg(xconn)));
+ *pstatus = map_nt_error_from_unix_common(saved_errno);
+ return 0;
+ }
+ goto out;
+ }
+
+ DEBUG(0,("smb2_sendfile_send_data: sendfile failed for file "
+ "%s (%s) for client %s. Terminating\n",
+ fsp_str_dbg(fsp), strerror(saved_errno),
+ smbXsrv_connection_dbg(xconn)));
+ *pstatus = map_nt_error_from_unix_common(saved_errno);
+ return 0;
+ } else if (nread == 0) {
+ /*
+ * Some sendfile implementations return 0 to indicate
+ * that there was a short read, but nothing was
+ * actually written to the socket. In this case,
+ * fallback to the normal read path so the header gets
+ * the correct byte count.
+ */
+ DEBUG(3, ("send_file_readX: sendfile sent zero bytes "
+ "falling back to the normal read: %s\n",
+ fsp_str_dbg(fsp)));
+ goto normal_read;
+ }
+
+ /*
+ * We got a short read
+ */
+ goto out;
+
+normal_read:
+ /* Send out the header. */
+ ret = write_data(xconn->transport.sock,
+ (const char *)hdr->data, hdr->length);
+ if (ret != hdr->length) {
+ saved_errno = errno;
+ DEBUG(0,("smb2_sendfile_send_data: write_data failed for file "
+ "%s (%s) for client %s. Terminating\n",
+ fsp_str_dbg(fsp), strerror(saved_errno),
+ smbXsrv_connection_dbg(xconn)));
+ *pstatus = map_nt_error_from_unix_common(saved_errno);
+ return 0;
+ }
+ nread = fake_sendfile(xconn, fsp, in_offset, in_length);
+ if (nread == -1) {
+ saved_errno = errno;
+ DEBUG(0,("smb2_sendfile_send_data: fake_sendfile "
+ "failed for file %s (%s) for client %s. "
+ "Terminating\n",
+ fsp_str_dbg(fsp), strerror(saved_errno),
+ smbXsrv_connection_dbg(xconn)));
+ *pstatus = map_nt_error_from_unix_common(saved_errno);
+ return 0;
+ }
+
+ out:
+
+ if (nread < in_length) {
+ ret = sendfile_short_send(xconn, fsp, nread,
+ hdr->length, in_length);
+ if (ret == -1) {
+ saved_errno = errno;
+ DEBUG(0,("%s: sendfile_short_send "
+ "failed for file %s (%s) for client %s. "
+ "Terminating\n",
+ __func__,
+ fsp_str_dbg(fsp), strerror(saved_errno),
+ smbXsrv_connection_dbg(xconn)));
+ *pstatus = map_nt_error_from_unix_common(saved_errno);
+ return 0;
+ }
+ }
+
+ init_strict_lock_struct(fsp,
+ fsp->op->global->open_persistent_id,
+ in_offset,
+ in_length,
+ READ_LOCK,
+ &lock);
+
+ SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &lock);
+
+ *pstatus = NT_STATUS_OK;
+ return 0;
+}
+
+static NTSTATUS schedule_smb2_sendfile_read(struct smbd_smb2_request *smb2req,
+ struct smbd_smb2_read_state *state)
+{
+ files_struct *fsp = state->fsp;
+
+ /*
+ * We cannot use sendfile if...
+ * We were not configured to do so OR
+ * Signing is active OR
+ * This is a compound SMB2 operation OR
+ * fsp is a STREAM file OR
+ * We're using a write cache OR
+ * It's not a regular file OR
+ * Requested offset is greater than file size OR
+ * there's not enough data in the file.
+ * Phew :-). Luckily this means most
+ * reads on most normal files. JRA.
+ */
+
+ if (!lp__use_sendfile(SNUM(fsp->conn)) ||
+ smb2req->do_signing ||
+ smb2req->do_encryption ||
+ smb2req->in.vector_count >= (2*SMBD_SMB2_NUM_IOV_PER_REQ) ||
+ (fsp->base_fsp != NULL) ||
+ (fsp->wcp != NULL) ||
+ (!S_ISREG(fsp->fsp_name->st.st_ex_mode)) ||
+ (state->in_offset >= fsp->fsp_name->st.st_ex_size) ||
+ (fsp->fsp_name->st.st_ex_size < state->in_offset + state->in_length))
+ {
+ return NT_STATUS_RETRY;
+ }
+
+ /* We've already checked there's this amount of data
+ to read. */
+ state->out_data.length = state->in_length;
+ state->out_remaining = 0;
+
+ state->out_headers = data_blob_const(state->_out_hdr_buf,
+ sizeof(state->_out_hdr_buf));
+ return NT_STATUS_OK;
+}
+
static void smbd_smb2_read_pipe_done(struct tevent_req *subreq);
+/*******************************************************************
+ Common read complete processing function for both synchronous and
+ asynchronous reads.
+*******************************************************************/
+
+NTSTATUS smb2_read_complete(struct tevent_req *req, ssize_t nread, int err)
+{
+ struct smbd_smb2_read_state *state = tevent_req_data(req,
+ struct smbd_smb2_read_state);
+ files_struct *fsp = state->fsp;
+
+ if (nread < 0) {
+ NTSTATUS status = map_nt_error_from_unix(err);
+
+ DEBUG( 3,( "smb2_read_complete: file %s nread = %d. "
+ "Error = %s (NTSTATUS %s)\n",
+ fsp_str_dbg(fsp),
+ (int)nread,
+ strerror(err),
+ nt_errstr(status)));
+
+ return status;
+ }
+ if (nread == 0 && state->in_length != 0) {
+ DEBUG(5,("smb2_read_complete: read_file[%s] end of file\n",
+ fsp_str_dbg(fsp)));
+ return NT_STATUS_END_OF_FILE;
+ }
+
+ if (nread < state->in_minimum) {
+ DEBUG(5,("smb2_read_complete: read_file[%s] read less %d than "
+ "minimum requested %u. Returning end of file\n",
+ fsp_str_dbg(fsp),
+ (int)nread,
+ (unsigned int)state->in_minimum));
+ return NT_STATUS_END_OF_FILE;
+ }
+
+ DEBUG(3,("smbd_smb2_read: %s, file %s, length=%lu offset=%lu read=%lu\n",
+ fsp_fnum_dbg(fsp),
+ fsp_str_dbg(fsp),
+ (unsigned long)state->in_length,
+ (unsigned long)state->in_offset,
+ (unsigned long)nread));
+
+ state->out_data.length = nread;
+ state->out_remaining = 0;
+
+ return NT_STATUS_OK;
+}
+
+static bool smbd_smb2_read_cancel(struct tevent_req *req)
+{
+ struct smbd_smb2_read_state *state =
+ tevent_req_data(req,
+ struct smbd_smb2_read_state);
+
+ return cancel_smb2_aio(state->smbreq);
+}
+
static struct tevent_req *smbd_smb2_read_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbd_smb2_request *smb2req,
- uint32_t in_smbpid,
- uint64_t in_file_id_volatile,
+ struct files_struct *fsp,
uint32_t in_length,
uint64_t in_offset,
uint32_t in_minimum,
uint32_t in_remaining)
{
- struct tevent_req *req;
- struct smbd_smb2_read_state *state;
- struct smb_request *smbreq;
- connection_struct *conn = smb2req->tcon->compat_conn;
- files_struct *fsp;
+ NTSTATUS status;
+ struct tevent_req *req = NULL;
+ struct smbd_smb2_read_state *state = NULL;
+ struct smb_request *smbreq = NULL;
+ connection_struct *conn = smb2req->tcon->compat;
ssize_t nread = -1;
struct lock_struct lock;
+ int saved_errno;
req = tevent_req_create(mem_ctx, &state,
struct smbd_smb2_read_state);
return NULL;
}
state->smb2req = smb2req;
+ state->in_length = in_length;
+ state->in_offset = in_offset;
+ state->in_minimum = in_minimum;
state->out_data = data_blob_null;
state->out_remaining = 0;
- DEBUG(10,("smbd_smb2_read: file_id[0x%016llX]\n",
- (unsigned long long)in_file_id_volatile));
+ DEBUG(10,("smbd_smb2_read: %s - %s\n",
+ fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
smbreq = smbd_smb2_fake_smb_request(smb2req);
if (tevent_req_nomem(smbreq, req)) {
return tevent_req_post(req, ev);
}
+ state->smbreq = smbreq;
- fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
- if (fsp == NULL) {
- tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
- return tevent_req_post(req, ev);
- }
- if (conn != fsp->conn) {
- tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
- return tevent_req_post(req, ev);
- }
- if (smb2req->session->vuid != fsp->vuid) {
- tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
- return tevent_req_post(req, ev);
- }
if (fsp->is_directory) {
tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
return tevent_req_post(req, ev);
}
- state->out_data = data_blob_talloc(state, NULL, in_length);
- if (in_length > 0 && tevent_req_nomem(state->out_data.data, req)) {
- return tevent_req_post(req, ev);
- }
+ state->fsp = fsp;
if (IS_IPC(smbreq->conn)) {
- struct tevent_req *subreq;
+ struct tevent_req *subreq = NULL;
+
+ state->out_data = data_blob_talloc(state, NULL, in_length);
+ if (in_length > 0 && tevent_req_nomem(state->out_data.data, req)) {
+ return tevent_req_post(req, ev);
+ }
if (!fsp_is_np(fsp)) {
tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
return tevent_req_post(req, ev);
}
- subreq = np_read_send(state, smbd_event_context(),
+ subreq = np_read_send(state, ev,
fsp->fake_file_handle,
state->out_data.data,
state->out_data.length);
return tevent_req_post(req, ev);
}
+ status = schedule_smb2_aio_read(fsp->conn,
+ smbreq,
+ fsp,
+ state,
+ &state->out_data,
+ (off_t)in_offset,
+ (size_t)in_length);
+
+ if (NT_STATUS_IS_OK(status)) {
+ /*
+ * Doing an async read, allow this
+ * request to be canceled
+ */
+ tevent_req_set_cancel_fn(req, smbd_smb2_read_cancel);
+ return req;
+ }
+
+ if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
+ /* Real error in setting up aio. Fail. */
+ tevent_req_nterror(req, status);
+ return tevent_req_post(req, ev);
+ }
+
+ /* Fallback to synchronous. */
+
init_strict_lock_struct(fsp,
- in_file_id_volatile,
+ fsp->op->global->open_persistent_id,
in_offset,
in_length,
READ_LOCK,
return tevent_req_post(req, ev);
}
+ /* Try sendfile in preference. */
+ status = schedule_smb2_sendfile_read(smb2req, state);
+ if (NT_STATUS_IS_OK(status)) {
+ tevent_req_done(req);
+ return tevent_req_post(req, ev);
+ } else {
+ if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
+ SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock);
+ tevent_req_nterror(req, status);
+ return tevent_req_post(req, ev);
+ }
+ }
+
+ /* Ok, read into memory. Allocate the out buffer. */
+ state->out_data = data_blob_talloc(state, NULL, in_length);
+ if (in_length > 0 && tevent_req_nomem(state->out_data.data, req)) {
+ SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock);
+ return tevent_req_post(req, ev);
+ }
+
nread = read_file(fsp,
(char *)state->out_data.data,
in_offset,
in_length);
+ saved_errno = errno;
+
SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock);
- DEBUG(10,("smbd_smb2_read: file %s handle [0x%016llX] offset=%llu "
+ DEBUG(10,("smbd_smb2_read: file %s, %s, offset=%llu "
"len=%llu returned %lld\n",
fsp_str_dbg(fsp),
- (unsigned long long)in_file_id_volatile,
+ fsp_fnum_dbg(fsp),
(unsigned long long)in_offset,
(unsigned long long)in_length,
(long long)nread));
- if (nread < 0) {
- DEBUG(5,("smbd_smb2_read: read_file[%s] nread[%lld]\n",
- fsp_str_dbg(fsp), (long long)nread));
- tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
- return tevent_req_post(req, ev);
- }
- if (nread == 0 && in_length != 0) {
- DEBUG(5,("smbd_smb2_read: read_file[%s] end of file\n",
- fsp_str_dbg(fsp)));
- tevent_req_nterror(req, NT_STATUS_END_OF_FILE);
- return tevent_req_post(req, ev);
- }
-
- if (nread < in_minimum) {
- DEBUG(5,("smbd_smb2_read: read_file[%s] read less %d than "
- "minimum requested %u. Returning end of file\n",
- fsp_str_dbg(fsp),
- (int)nread,
- (unsigned int)in_minimum));
- tevent_req_nterror(req, NT_STATUS_END_OF_FILE);
- return tevent_req_post(req, ev);
+ status = smb2_read_complete(req, nread, saved_errno);
+ if (!NT_STATUS_IS_OK(status)) {
+ tevent_req_nterror(req, status);
+ } else {
+ /* Success. */
+ tevent_req_done(req);
}
-
- state->out_data.length = nread;
- state->out_remaining = 0;
- tevent_req_done(req);
return tevent_req_post(req, ev);
}
status = np_read_recv(subreq, &nread, &is_data_outstanding);
TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status)) {
+ NTSTATUS old = status;
+ status = nt_status_np_pipe(old);
tevent_req_nterror(req, status);
return;
}
state->out_data.length = nread;
state->out_remaining = 0;
+ /*
+ * TODO: add STATUS_BUFFER_OVERFLOW handling, once we also
+ * handle it in SMB1 pipe_read_andx_done().
+ */
+
tevent_req_done(req);
}
talloc_steal(mem_ctx, out_data->data);
*out_remaining = state->out_remaining;
- tevent_req_received(req);
+ if (state->out_headers.length > 0) {
+ talloc_steal(mem_ctx, state);
+ talloc_set_destructor(state, smb2_smb2_read_state_deny_destructor);
+ tevent_req_received(req);
+ state->smb2req->queue_entry.sendfile_header = &state->out_headers;
+ talloc_set_destructor(state, smb2_sendfile_send_data);
+ } else {
+ tevent_req_received(req);
+ }
+
return NT_STATUS_OK;
}