*/
#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"
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;
+ 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 > req->sconn->smb2.max_read) {
+ DEBUG(2,("smbd_smb2_request_process_read: "
+ "client ignored max read: %s: 0x%08X: 0x%08X\n",
+ __location__, in_length, req->sconn->smb2.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;
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);
if (outbody.data == NULL) {
error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
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;
DATA_BLOB out_data;
uint32_t out_remaining;
};
+/* 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;
+ ssize_t nread;
+
+ nread = SMB_VFS_SENDFILE(fsp->conn->sconn->sock,
+ fsp,
+ state->smb2req->queue_entry.sendfile_header,
+ 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) {
+ if (errno == ENOSYS || errno == EINTR) {
+ /*
+ * Special hack for broken systems with no working
+ * sendfile. Fake this up by doing read/write calls.
+ */
+ set_use_sendfile(SNUM(fsp->conn), false);
+ nread = fake_sendfile(fsp, in_offset, in_length);
+ if (nread == -1) {
+ DEBUG(0,("smb2_sendfile_send_data: "
+ "fake_sendfile failed for "
+ "file %s (%s).\n",
+ fsp_str_dbg(fsp),
+ strerror(errno)));
+ exit_server_cleanly("smb2_sendfile_send_data: "
+ "fake_sendfile failed");
+ }
+ goto out;
+ }
+
+ DEBUG(0,("smb2_sendfile_send_data: sendfile failed for file "
+ "%s (%s). Terminating\n",
+ fsp_str_dbg(fsp),
+ strerror(errno)));
+ exit_server_cleanly("smb2_sendfile_send_data: sendfile failed");
+ } 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)));
+
+ nread = fake_sendfile(fsp, in_offset, in_length);
+ if (nread == -1) {
+ DEBUG(0,("smb2_sendfile_send_data: "
+ "fake_sendfile failed for file "
+ "%s (%s). Terminating\n",
+ fsp_str_dbg(fsp),
+ strerror(errno)));
+ exit_server_cleanly("smb2_sendfile_send_data: "
+ "fake_sendfile failed");
+ }
+ }
+
+ out:
+
+ if (nread < in_length) {
+ sendfile_short_send(fsp, nread, 0, in_length);
+ }
+
+ 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);
+ return 0;
+}
+
+static NTSTATUS schedule_smb2_sendfile_read(struct smbd_smb2_request *smb2req,
+ struct smbd_smb2_read_state *state)
+{
+ struct smbd_smb2_read_state *state_copy = NULL;
+ 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;
+
+ /* Make a copy of state attached to the smb2req. Attach
+ the destructor here as this will trigger the sendfile
+ call when the request is destroyed. */
+ state_copy = talloc(smb2req, struct smbd_smb2_read_state);
+ if (!state_copy) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ *state_copy = *state;
+ talloc_set_destructor(state_copy, smb2_sendfile_send_data);
+ state->smb2req->queue_entry.sendfile_header = &state_copy->out_headers;
+ return NT_STATUS_OK;
+}
+
static void smbd_smb2_read_pipe_done(struct tevent_req *subreq);
/*******************************************************************
return NT_STATUS_END_OF_FILE;
}
- DEBUG(3,("smbd_smb2_read: fnum=[%d/%s] length=%lu offset=%lu read=%lu\n",
- fsp->fnum,
+ 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,
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,
struct tevent_req *req = NULL;
struct smbd_smb2_read_state *state = NULL;
struct smb_request *smbreq = NULL;
- connection_struct *conn = smb2req->tcon->compat_conn;
- files_struct *fsp = NULL;
+ connection_struct *conn = smb2req->tcon->compat;
ssize_t nread = -1;
struct lock_struct lock;
int saved_errno;
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 = 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);
status = schedule_smb2_aio_read(fsp->conn,
smbreq,
fsp,
- (char *)state->out_data.data,
- (SMB_OFF_T)in_offset,
+ state,
+ &state->out_data,
+ (off_t)in_offset,
(size_t)in_length);
if (NT_STATUS_IS_OK(status)) {
/*
- * Doing an async read. Don't
- * send a "gone async" message
- * as we expect this to be less
- * than the client timeout period.
- * JRA. FIXME for offline files..
- * FIXME. Add cancel code..
+ * Doing an async read, allow this
+ * request to be canceled
*/
- smb2req->async = true;
+ 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, NT_STATUS_FILE_CLOSED);
+ 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,
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));
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);
}
git.samba.org / samba.git / blobdiff