*/
#include "includes.h"
+#include "system/filesys.h"
+#include "smbd/smbd.h"
#include "smbd/globals.h"
-#include "../source4/libcli/smb2/smb2_constants.h"
+#include "../libcli/smb/smb_common.h"
+#include "libcli/security/security.h"
static struct tevent_req *smbd_smb2_read_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
in_remaining_bytes = IVAL(inbody, 0x28);
/* check the max read size */
- if (in_length > 0x00010000) {
+ if (in_length > lp_smb2_max_read()) {
DEBUG(0,("here:%s: 0x%08X: 0x%08X\n",
- __location__, in_length, 0x00010000));
+ __location__, in_length, lp_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 != 0) {
+ } else if (in_file_id_persistent != in_file_id_volatile) {
return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
}
}
tevent_req_set_callback(subreq, smbd_smb2_request_read_done, req);
- if (tevent_req_is_in_progress(subreq)) {
- return smbd_smb2_request_pending_queue(req);
- }
-
- return NT_STATUS_OK;
+ return smbd_smb2_request_pending_queue(req, subreq);
}
static void smbd_smb2_request_read_done(struct tevent_req *subreq)
struct smbd_smb2_read_state {
struct smbd_smb2_request *smb2req;
+ files_struct *fsp;
+ uint64_t in_file_id_volatile;
+ uint32_t in_length;
+ uint64_t in_offset;
+ uint32_t in_minimum;
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,
+ NULL,
+ 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,
+ state->in_file_id_volatile,
+ 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->in.vector_count != 4 ||
+ (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_P(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);
+ 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: fnum=[%d/%s] length=%lu offset=%lu read=%lu\n",
+ fsp->fnum,
+ 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 struct tevent_req *smbd_smb2_read_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbd_smb2_request *smb2req,
uint32_t in_minimum,
uint32_t in_remaining)
{
- struct tevent_req *req;
- struct smbd_smb2_read_state *state;
- struct smb_request *smbreq;
+ 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_conn;
- files_struct *fsp;
+ files_struct *fsp = NULL;
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;
tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
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)) {
+ if (fsp->is_directory) {
+ tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
return tevent_req_post(req, ev);
}
+ state->fsp = fsp;
+ state->in_file_id_volatile = in_file_id_volatile;
+
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);
}
+ status = schedule_smb2_aio_read(fsp->conn,
+ smbreq,
+ fsp,
+ state,
+ &state->out_data,
+ (SMB_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..
+ */
+ smb2req->async = true;
+ 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);
+ return tevent_req_post(req, ev);
+ }
+
+ /* Fallback to synchronous. */
+
init_strict_lock_struct(fsp,
- in_smbpid,
+ in_file_id_volatile,
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);
- 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);
- }
+ DEBUG(10,("smbd_smb2_read: file %s handle [0x%016llX] offset=%llu "
+ "len=%llu returned %lld\n",
+ fsp_str_dbg(fsp),
+ (unsigned long long)in_file_id_volatile,
+ (unsigned long long)in_offset,
+ (unsigned long long)in_length,
+ (long long)nread));
- state->out_data.length = nread;
- state->out_remaining = 0;
- tevent_req_done(req);
+ 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);
+ }
return tevent_req_post(req, ev);
}
git.samba.org / nivanova / samba-autobuild / .git / blobdiff