#include "includes.h"
/****************************************************************************
-Issue a single SMBread and don't wait for a reply.
+ Calculate the recommended read buffer size
****************************************************************************/
+static size_t cli_read_max_bufsize(struct cli_state *cli)
+{
+ if (!client_is_signing_on(cli) && !cli_encryption_on(cli)
+ && (cli->posix_capabilities & CIFS_UNIX_LARGE_READ_CAP)) {
+ return CLI_SAMBA_MAX_POSIX_LARGE_READX_SIZE;
+ }
+ if (cli->capabilities & CAP_LARGE_READX) {
+ return cli->is_samba
+ ? CLI_SAMBA_MAX_LARGE_READX_SIZE
+ : CLI_WINDOWS_MAX_LARGE_READX_SIZE;
+ }
+ return (cli->max_xmit - (smb_size+32)) & ~1023;
+}
+
+/****************************************************************************
+ Calculate the recommended write buffer size
+****************************************************************************/
+static size_t cli_write_max_bufsize(struct cli_state *cli, uint16_t write_mode)
+{
+ if (write_mode == 0 &&
+ !client_is_signing_on(cli) &&
+ !cli_encryption_on(cli) &&
+ (cli->posix_capabilities & CIFS_UNIX_LARGE_WRITE_CAP) &&
+ (cli->capabilities & CAP_LARGE_FILES)) {
+ /* Only do massive writes if we can do them direct
+ * with no signing or encrypting - not on a pipe. */
+ return CLI_SAMBA_MAX_POSIX_LARGE_WRITEX_SIZE;
+ }
+
+ if (cli->is_samba) {
+ return CLI_SAMBA_MAX_LARGE_WRITEX_SIZE;
+ }
+
+ if (((cli->capabilities & CAP_LARGE_WRITEX) == 0)
+ || client_is_signing_on(cli)
+ || strequal(cli->dev, "LPT1:")) {
+
+ /*
+ * Printer devices are restricted to max_xmit writesize in
+ * Vista and XPSP3 as are signing connections.
+ */
+
+ return (cli->max_xmit - (smb_size+32)) & ~1023;
+ }
+
+ return CLI_WINDOWS_MAX_LARGE_WRITEX_SIZE;
+}
-static bool cli_issue_read(struct cli_state *cli, int fnum, off_t offset,
- size_t size, int i)
+
+/*
+ * Send a read&x request
+ */
+
+struct async_req *cli_read_andx_send(TALLOC_CTX *mem_ctx,
+ struct event_context *ev,
+ struct cli_state *cli, int fnum,
+ off_t offset, size_t size)
{
+ struct async_req *result;
+ struct cli_request *req;
bool bigoffset = False;
- memset(cli->outbuf,'\0',smb_size);
- memset(cli->inbuf,'\0',smb_size);
+ uint16_t vwv[12];
+ uint8_t wct = 10;
+
+ if (size > cli_read_max_bufsize(cli)) {
+ DEBUG(0, ("cli_read_andx_send got size=%d, can only handle "
+ "size=%d\n", (int)size,
+ (int)cli_read_max_bufsize(cli)));
+ return NULL;
+ }
- if ((SMB_BIG_UINT)offset >> 32)
+ SCVAL(vwv + 0, 0, 0xFF);
+ SCVAL(vwv + 0, 1, 0);
+ SSVAL(vwv + 1, 0, 0);
+ SSVAL(vwv + 2, 0, fnum);
+ SIVAL(vwv + 3, 0, offset);
+ SSVAL(vwv + 5, 0, size);
+ SSVAL(vwv + 6, 0, size);
+ SSVAL(vwv + 7, 0, (size >> 16));
+ SSVAL(vwv + 8, 0, 0);
+ SSVAL(vwv + 9, 0, 0);
+
+ if ((uint64_t)offset >> 32) {
bigoffset = True;
+ SIVAL(vwv + 10, 0,
+ (((uint64_t)offset)>>32) & 0xffffffff);
+ wct += 2;
+ }
- cli_set_message(cli->outbuf,bigoffset ? 12 : 10,0,True);
+ result = cli_request_send(mem_ctx, ev, cli, SMBreadX, 0, wct, vwv, 0,
+ 0, NULL);
+ if (result == NULL) {
+ return NULL;
+ }
- SCVAL(cli->outbuf,smb_com,SMBreadX);
- SSVAL(cli->outbuf,smb_tid,cli->cnum);
- cli_setup_packet(cli);
+ req = talloc_get_type_abort(result->private_data, struct cli_request);
- SCVAL(cli->outbuf,smb_vwv0,0xFF);
- SSVAL(cli->outbuf,smb_vwv2,fnum);
- SIVAL(cli->outbuf,smb_vwv3,offset);
- SSVAL(cli->outbuf,smb_vwv5,size);
- SSVAL(cli->outbuf,smb_vwv6,size);
- SSVAL(cli->outbuf,smb_vwv7,(size >> 16));
- SSVAL(cli->outbuf,smb_mid,cli->mid + i);
+ req->data.read.ofs = offset;
+ req->data.read.size = size;
+ req->data.read.received = 0;
+ req->data.read.rcvbuf = NULL;
- if (bigoffset) {
- SIVAL(cli->outbuf,smb_vwv10,(((SMB_BIG_UINT)offset)>>32) & 0xffffffff);
+ return result;
+}
+
+/*
+ * Pull the data out of a finished async read_and_x request. rcvbuf is
+ * talloced from the request, so better make sure that you copy it away before
+ * you talloc_free(req). "rcvbuf" is NOT a talloc_ctx of its own, so do not
+ * talloc_move it!
+ */
+
+NTSTATUS cli_read_andx_recv(struct async_req *req, ssize_t *received,
+ uint8_t **rcvbuf)
+{
+ struct cli_request *cli_req = talloc_get_type_abort(
+ req->private_data, struct cli_request);
+ uint8_t wct;
+ uint16_t *vwv;
+ uint16_t num_bytes;
+ uint8_t *bytes;
+ uint8_t *buf;
+ NTSTATUS status;
+ size_t size;
+
+ if (async_req_is_nterror(req, &status)) {
+ return status;
}
- return cli_send_smb(cli);
-}
+ status = cli_pull_reply(req, &wct, &vwv, &num_bytes, &bytes);
-/****************************************************************************
- Read size bytes at offset offset using SMBreadX.
-****************************************************************************/
+ if (NT_STATUS_IS_ERR(status)) {
+ return status;
+ }
-ssize_t cli_read(struct cli_state *cli, int fnum, char *buf, off_t offset, size_t size)
-{
- char *p;
- size_t size2;
- size_t readsize;
- ssize_t total = 0;
- /* We can only do direct reads if not signing or encrypting. */
- bool direct_reads = !client_is_signing_on(cli) && !cli_encryption_on(cli);
+ if (wct < 12) {
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ }
+
+ /* size is the number of bytes the server returned.
+ * Might be zero. */
+ size = SVAL(vwv + 5, 0);
+ size |= (((unsigned int)SVAL(vwv + 7, 0)) << 16);
- if (size == 0)
- return 0;
+ if (size > cli_req->data.read.size) {
+ DEBUG(5,("server returned more than we wanted!\n"));
+ return NT_STATUS_UNEXPECTED_IO_ERROR;
+ }
/*
- * Set readsize to the maximum size we can handle in one readX,
- * rounded down to a multiple of 1024.
+ * bcc field must be valid for small reads, for large reads the 16-bit
+ * bcc field can't be correct.
*/
- if (client_is_signing_on(cli) == false &&
- cli_encryption_on(cli) == false &&
- (cli->posix_capabilities & CIFS_UNIX_LARGE_READ_CAP)) {
- readsize = CLI_SAMBA_MAX_POSIX_LARGE_READX_SIZE;
- } else if (cli->capabilities & CAP_LARGE_READX) {
- if (cli->is_samba) {
- readsize = CLI_SAMBA_MAX_LARGE_READX_SIZE;
- } else {
- readsize = CLI_WINDOWS_MAX_LARGE_READX_SIZE;
- }
- } else {
- readsize = (cli->max_xmit - (smb_size+32)) & ~1023;
+ if ((size < 0xffff) && (size > num_bytes)) {
+ DEBUG(5, ("server announced more bytes than sent\n"));
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
- while (total < size) {
- readsize = MIN(readsize, size-total);
+ buf = (uint8_t *)smb_base(cli_req->inbuf) + SVAL(vwv+6, 0);
- /* Issue a read and receive a reply */
-
- if (!cli_issue_read(cli, fnum, offset, readsize, 0))
- return -1;
+ if (trans_oob(smb_len(cli_req->inbuf), SVAL(vwv+6, 0), size)
+ || (buf < bytes)) {
+ DEBUG(5, ("server returned invalid read&x data offset\n"));
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ }
- if (direct_reads) {
- if (!cli_receive_smb_readX_header(cli))
- return -1;
- } else {
- if (!cli_receive_smb(cli))
- return -1;
- }
+ *rcvbuf = (uint8_t *)(smb_base(cli_req->inbuf) + SVAL(vwv + 6, 0));
+ *received = size;
+ return NT_STATUS_OK;
+}
- /* Check for error. Make sure to check for DOS and NT
- errors. */
+/*
+ * Parallel read support.
+ *
+ * cli_pull sends as many read&x requests as the server would allow via
+ * max_mux at a time. When replies flow back in, the data is written into
+ * the callback function "sink" in the right order.
+ */
- if (cli_is_error(cli)) {
- bool recoverable_error = False;
- NTSTATUS status = NT_STATUS_OK;
- uint8 eclass = 0;
- uint32 ecode = 0;
+struct cli_pull_state {
+ struct async_req *req;
- if (cli_is_nt_error(cli))
- status = cli_nt_error(cli);
- else
- cli_dos_error(cli, &eclass, &ecode);
+ struct event_context *ev;
+ struct cli_state *cli;
+ uint16_t fnum;
+ off_t start_offset;
+ SMB_OFF_T size;
- /*
- * ERRDOS ERRmoredata or STATUS_MORE_ENRTIES is a
- * recoverable error, plus we have valid data in the
- * packet so don't error out here.
- */
+ NTSTATUS (*sink)(char *buf, size_t n, void *priv);
+ void *priv;
- if ((eclass == ERRDOS && ecode == ERRmoredata) ||
- NT_STATUS_V(status) == NT_STATUS_V(STATUS_MORE_ENTRIES))
- recoverable_error = True;
+ size_t chunk_size;
- if (!recoverable_error)
- return -1;
- }
+ /*
+ * Outstanding requests
+ */
+ int num_reqs;
+ struct async_req **reqs;
- /* size2 is the number of bytes the server returned.
- * Might be zero. */
- size2 = SVAL(cli->inbuf, smb_vwv5);
- size2 |= (((unsigned int)(SVAL(cli->inbuf, smb_vwv7))) << 16);
+ /*
+ * For how many bytes did we send requests already?
+ */
+ SMB_OFF_T requested;
- if (size2 > readsize) {
- DEBUG(5,("server returned more than we wanted!\n"));
- return -1;
- } else if (size2 < 0) {
- DEBUG(5,("read return < 0!\n"));
- return -1;
- }
+ /*
+ * Next request index to push into "sink". This walks around the "req"
+ * array, taking care that the requests are pushed to "sink" in the
+ * right order. If necessary (i.e. replies don't come in in the right
+ * order), replies are held back in "reqs".
+ */
+ int top_req;
- if (size2) {
- /* smb_vwv6 is the offset in the packet of the returned
- * data bytes. Only valid if size2 != 0. */
-
- if (!direct_reads) {
- /* Copy data into buffer */
- p = smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_vwv6);
- memcpy(buf + total, p, size2);
- } else {
- /* Ensure the remaining data matches the return size. */
- ssize_t toread = smb_len_large(cli->inbuf) - SVAL(cli->inbuf,smb_vwv6);
-
- /* Ensure the size is correct. */
- if (toread != size2) {
- DEBUG(5,("direct read logic fail toread (%d) != size2 (%u)\n",
- (int)toread, (unsigned int)size2 ));
- return -1;
- }
-
- /* Read data directly into buffer */
- toread = cli_receive_smb_data(cli,buf+total,size2);
- if (toread != size2) {
- DEBUG(5,("direct read read failure toread (%d) != size2 (%u)\n",
- (int)toread, (unsigned int)size2 ));
- return -1;
- }
- }
- }
+ /*
+ * How many bytes did we push into "sink"?
+ */
- total += size2;
- offset += size2;
+ SMB_OFF_T pushed;
+};
- /*
- * If the server returned less than we asked for we're at EOF.
- */
+static char *cli_pull_print(TALLOC_CTX *mem_ctx, struct async_req *req)
+{
+ struct cli_pull_state *state = talloc_get_type_abort(
+ req->private_data, struct cli_pull_state);
+ char *result;
- if (size2 < readsize)
- break;
+ result = async_req_print(mem_ctx, req);
+ if (result == NULL) {
+ return NULL;
}
- return total;
+ return talloc_asprintf_append_buffer(
+ result, "num_reqs=%d, top_req=%d",
+ state->num_reqs, state->top_req);
}
-#if 0 /* relies on client_receive_smb(), now a static in libsmb/clientgen.c */
+static void cli_pull_read_done(struct async_req *read_req);
-/* This call is INCOMPATIBLE with SMB signing. If you remove the #if 0
- you must fix ensure you don't attempt to sign the packets - data
- *will* be currupted */
+/*
+ * Prepare an async pull request
+ */
+
+struct async_req *cli_pull_send(TALLOC_CTX *mem_ctx,
+ struct event_context *ev,
+ struct cli_state *cli,
+ uint16_t fnum, off_t start_offset,
+ SMB_OFF_T size, size_t window_size,
+ NTSTATUS (*sink)(char *buf, size_t n,
+ void *priv),
+ void *priv)
+{
+ struct async_req *result;
+ struct cli_pull_state *state;
+ int i;
-/****************************************************************************
-Issue a single SMBreadraw and don't wait for a reply.
-****************************************************************************/
+ if (!async_req_setup(mem_ctx, &result, &state,
+ struct cli_pull_state)) {
+ return NULL;
+ }
+ result->print = cli_pull_print;
+ state->req = result;
+
+ state->cli = cli;
+ state->ev = ev;
+ state->fnum = fnum;
+ state->start_offset = start_offset;
+ state->size = size;
+ state->sink = sink;
+ state->priv = priv;
+
+ state->pushed = 0;
+ state->top_req = 0;
+
+ if (size == 0) {
+ if (!async_post_ntstatus(result, ev, NT_STATUS_OK)) {
+ goto failed;
+ }
+ return result;
+ }
-static bool cli_issue_readraw(struct cli_state *cli, int fnum, off_t offset,
- size_t size, int i)
-{
+ state->chunk_size = cli_read_max_bufsize(cli);
+
+ state->num_reqs = MAX(window_size/state->chunk_size, 1);
+ state->num_reqs = MIN(state->num_reqs, cli->max_mux);
- if (!cli->sign_info.use_smb_signing) {
- DEBUG(0, ("Cannot use readraw and SMB Signing\n"));
- return False;
+ state->reqs = TALLOC_ZERO_ARRAY(state, struct async_req *,
+ state->num_reqs);
+ if (state->reqs == NULL) {
+ goto failed;
}
-
- memset(cli->outbuf,'\0',smb_size);
- memset(cli->inbuf,'\0',smb_size);
- cli_set_message(cli->outbuf,10,0,True);
-
- SCVAL(cli->outbuf,smb_com,SMBreadbraw);
- SSVAL(cli->outbuf,smb_tid,cli->cnum);
- cli_setup_packet(cli);
+ state->requested = 0;
- SSVAL(cli->outbuf,smb_vwv0,fnum);
- SIVAL(cli->outbuf,smb_vwv1,offset);
- SSVAL(cli->outbuf,smb_vwv2,size);
- SSVAL(cli->outbuf,smb_vwv3,size);
- SSVAL(cli->outbuf,smb_mid,cli->mid + i);
+ for (i=0; i<state->num_reqs; i++) {
+ SMB_OFF_T size_left;
+ size_t request_thistime;
+
+ if (state->requested >= size) {
+ state->num_reqs = i;
+ break;
+ }
+
+ size_left = size - state->requested;
+ request_thistime = MIN(size_left, state->chunk_size);
+
+ state->reqs[i] = cli_read_andx_send(
+ state->reqs, ev, cli, fnum,
+ state->start_offset + state->requested,
+ request_thistime);
+
+ if (state->reqs[i] == NULL) {
+ goto failed;
+ }
- return cli_send_smb(cli);
+ state->reqs[i]->async.fn = cli_pull_read_done;
+ state->reqs[i]->async.priv = result;
+
+ state->requested += request_thistime;
+ }
+ return result;
+
+failed:
+ TALLOC_FREE(result);
+ return NULL;
}
-/****************************************************************************
- Tester for the readraw call.
-****************************************************************************/
+/*
+ * Handle incoming read replies, push the data into sink and send out new
+ * requests if necessary.
+ */
-ssize_t cli_readraw(struct cli_state *cli, int fnum, char *buf, off_t offset, size_t size)
+static void cli_pull_read_done(struct async_req *read_req)
{
- char *p;
- int size2;
- size_t readsize;
- ssize_t total = 0;
-
- if (size == 0)
- return 0;
+ struct async_req *pull_req = talloc_get_type_abort(
+ read_req->async.priv, struct async_req);
+ struct cli_pull_state *state = talloc_get_type_abort(
+ pull_req->private_data, struct cli_pull_state);
+ struct cli_request *read_state = talloc_get_type_abort(
+ read_req->private_data, struct cli_request);
+ NTSTATUS status;
+
+ status = cli_read_andx_recv(read_req, &read_state->data.read.received,
+ &read_state->data.read.rcvbuf);
+ if (!NT_STATUS_IS_OK(status)) {
+ async_req_nterror(state->req, status);
+ return;
+ }
/*
- * Set readsize to the maximum size we can handle in one readraw.
+ * This loop is the one to take care of out-of-order replies. All
+ * pending requests are in state->reqs, state->reqs[top_req] is the
+ * one that is to be pushed next. If however a request later than
+ * top_req is replied to, then we can't push yet. If top_req is
+ * replied to at a later point then, we need to push all the finished
+ * requests.
*/
- readsize = 0xFFFF;
-
- while (total < size) {
- readsize = MIN(readsize, size-total);
+ while (state->reqs[state->top_req] != NULL) {
+ struct cli_request *top_read;
- /* Issue a read and receive a reply */
+ DEBUG(11, ("cli_pull_read_done: top_req = %d\n",
+ state->top_req));
- if (!cli_issue_readraw(cli, fnum, offset, readsize, 0))
- return -1;
+ if (state->reqs[state->top_req]->state < ASYNC_REQ_DONE) {
+ DEBUG(11, ("cli_pull_read_done: top request not yet "
+ "done\n"));
+ return;
+ }
- if (!client_receive_smb(cli->fd, cli->inbuf, cli->timeout))
- return -1;
+ top_read = talloc_get_type_abort(
+ state->reqs[state->top_req]->private_data,
+ struct cli_request);
- size2 = smb_len(cli->inbuf);
+ DEBUG(10, ("cli_pull_read_done: Pushing %d bytes, %d already "
+ "pushed\n", (int)top_read->data.read.received,
+ (int)state->pushed));
- if (size2 > readsize) {
- DEBUG(5,("server returned more than we wanted!\n"));
- return -1;
- } else if (size2 < 0) {
- DEBUG(5,("read return < 0!\n"));
- return -1;
+ status = state->sink((char *)top_read->data.read.rcvbuf,
+ top_read->data.read.received,
+ state->priv);
+ if (!NT_STATUS_IS_OK(status)) {
+ async_req_nterror(state->req, status);
+ return;
}
+ state->pushed += top_read->data.read.received;
+
+ TALLOC_FREE(state->reqs[state->top_req]);
- /* Copy data into buffer */
+ if (state->requested < state->size) {
+ struct async_req *new_req;
+ SMB_OFF_T size_left;
+ size_t request_thistime;
- if (size2) {
- p = cli->inbuf + 4;
- memcpy(buf + total, p, size2);
+ size_left = state->size - state->requested;
+ request_thistime = MIN(size_left, state->chunk_size);
+
+ DEBUG(10, ("cli_pull_read_done: Requesting %d bytes "
+ "at %d, position %d\n",
+ (int)request_thistime,
+ (int)(state->start_offset
+ + state->requested),
+ state->top_req));
+
+ new_req = cli_read_andx_send(
+ state->reqs, state->ev, state->cli,
+ state->fnum,
+ state->start_offset + state->requested,
+ request_thistime);
+
+ if (async_req_ntnomem(new_req, state->req)) {
+ return;
+ }
+
+ new_req->async.fn = cli_pull_read_done;
+ new_req->async.priv = pull_req;
+
+ state->reqs[state->top_req] = new_req;
+ state->requested += request_thistime;
}
- total += size2;
- offset += size2;
+ state->top_req = (state->top_req+1) % state->num_reqs;
+ }
+
+ async_req_done(pull_req);
+}
+
+NTSTATUS cli_pull_recv(struct async_req *req, SMB_OFF_T *received)
+{
+ struct cli_pull_state *state = talloc_get_type_abort(
+ req->private_data, struct cli_pull_state);
+ NTSTATUS status;
+
+ if (async_req_is_nterror(req, &status)) {
+ return status;
+ }
+ *received = state->pushed;
+ return NT_STATUS_OK;
+}
+
+NTSTATUS cli_pull(struct cli_state *cli, uint16_t fnum,
+ off_t start_offset, SMB_OFF_T size, size_t window_size,
+ NTSTATUS (*sink)(char *buf, size_t n, void *priv),
+ void *priv, SMB_OFF_T *received)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ struct event_context *ev;
+ struct async_req *req;
+ NTSTATUS result = NT_STATUS_NO_MEMORY;
+ if (cli->fd_event != NULL) {
/*
- * If the server returned less than we asked for we're at EOF.
+ * Can't use sync call while an async call is in flight
*/
+ return NT_STATUS_INVALID_PARAMETER;
+ }
- if (size2 < readsize)
- break;
+ ev = event_context_init(frame);
+ if (ev == NULL) {
+ goto nomem;
}
- return total;
+ req = cli_pull_send(frame, ev, cli, fnum, start_offset, size,
+ window_size, sink, priv);
+ if (req == NULL) {
+ goto nomem;
+ }
+
+ while (req->state < ASYNC_REQ_DONE) {
+ event_loop_once(ev);
+ }
+
+ result = cli_pull_recv(req, received);
+ nomem:
+ TALLOC_FREE(frame);
+ return result;
+}
+
+static NTSTATUS cli_read_sink(char *buf, size_t n, void *priv)
+{
+ char **pbuf = (char **)priv;
+ memcpy(*pbuf, buf, n);
+ *pbuf += n;
+ return NT_STATUS_OK;
+}
+
+ssize_t cli_read(struct cli_state *cli, int fnum, char *buf,
+ off_t offset, size_t size)
+{
+ NTSTATUS status;
+ SMB_OFF_T ret;
+
+ status = cli_pull(cli, fnum, offset, size, size,
+ cli_read_sink, &buf, &ret);
+ if (!NT_STATUS_IS_OK(status)) {
+ cli_set_error(cli, status);
+ return -1;
+ }
+ return ret;
}
-#endif
/****************************************************************************
Issue a single SMBwrite and don't wait for a reply.
smb_buf(cli->outbuf) - smb_base(cli->outbuf) + 1);
if (large_writex) {
- SIVAL(cli->outbuf,smb_vwv12,(((SMB_BIG_UINT)offset)>>32) & 0xffffffff);
+ SIVAL(cli->outbuf,smb_vwv12,(((uint64_t)offset)>>32) & 0xffffffff);
}
p = smb_base(cli->outbuf) + SVAL(cli->outbuf,smb_vwv11) -1;
mpx = 1;
}
- /* Default (small) writesize. */
- writesize = (cli->max_xmit - (smb_size+32)) & ~1023;
-
- if (write_mode == 0 &&
- !client_is_signing_on(cli) &&
- !cli_encryption_on(cli) &&
- (cli->posix_capabilities & CIFS_UNIX_LARGE_WRITE_CAP) &&
- (cli->capabilities & CAP_LARGE_FILES)) {
- /* Only do massive writes if we can do them direct
- * with no signing or encrypting - not on a pipe. */
- writesize = CLI_SAMBA_MAX_POSIX_LARGE_WRITEX_SIZE;
- } else if (cli->capabilities & CAP_LARGE_WRITEX) {
- if (cli->is_samba) {
- writesize = CLI_SAMBA_MAX_LARGE_WRITEX_SIZE;
- } else if (!client_is_signing_on(cli)) {
- /* Windows restricts signed writes to max_xmit.
- * Found by Volker. */
- writesize = CLI_WINDOWS_MAX_LARGE_WRITEX_SIZE;
- }
- }
+ writesize = cli_write_max_bufsize(cli, write_mode);
blocks = (size + (writesize-1)) / writesize;
break;
bwritten += SVAL(cli->inbuf, smb_vwv2);
- bwritten += (((int)(SVAL(cli->inbuf, smb_vwv4)))<<16);
+ if (writesize > 0xFFFF) {
+ bwritten += (((int)(SVAL(cli->inbuf, smb_vwv4)))<<16);
+ }
}
while (received < issued && cli_receive_smb(cli)) {
return total;
}
+
+/*
+ * Send a write&x request
+ */
+
+struct async_req *cli_write_andx_send(TALLOC_CTX *mem_ctx,
+ struct event_context *ev,
+ struct cli_state *cli, uint16_t fnum,
+ uint16_t mode, const uint8_t *buf,
+ off_t offset, size_t size)
+{
+ bool bigoffset = ((cli->capabilities & CAP_LARGE_FILES) != 0);
+ uint8_t wct = bigoffset ? 14 : 12;
+ size_t max_write = cli_write_max_bufsize(cli, mode);
+ uint16_t vwv[14];
+
+ size = MIN(size, max_write);
+
+ SCVAL(vwv+0, 0, 0xFF);
+ SCVAL(vwv+0, 1, 0);
+ SSVAL(vwv+1, 0, 0);
+ SSVAL(vwv+2, 0, fnum);
+ SIVAL(vwv+3, 0, offset);
+ SIVAL(vwv+5, 0, 0);
+ SSVAL(vwv+7, 0, mode);
+ SSVAL(vwv+8, 0, 0);
+ SSVAL(vwv+9, 0, (size>>16));
+ SSVAL(vwv+10, 0, size);
+
+ SSVAL(vwv+11, 0,
+ cli_wct_ofs(cli)
+ + 1 /* the wct field */
+ + wct * 2 /* vwv */
+ + 2 /* num_bytes field */
+ + 1 /* pad */);
+
+ if (bigoffset) {
+ SIVAL(vwv+12, 0, (((uint64_t)offset)>>32) & 0xffffffff);
+ }
+
+ return cli_request_send(mem_ctx, ev, cli, SMBwriteX, 0, wct, vwv,
+ 2, size, buf);
+}
+
+NTSTATUS cli_write_andx_recv(struct async_req *req, size_t *pwritten)
+{
+ uint8_t wct;
+ uint16_t *vwv;
+ uint16_t num_bytes;
+ uint8_t *bytes;
+ NTSTATUS status;
+ size_t written;
+
+ if (async_req_is_nterror(req, &status)) {
+ return status;
+ }
+
+ status = cli_pull_reply(req, &wct, &vwv, &num_bytes, &bytes);
+
+ if (NT_STATUS_IS_ERR(status)) {
+ return status;
+ }
+
+ if (wct < 6) {
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ }
+
+ written = SVAL(vwv+2, 0);
+ written |= SVAL(vwv+4, 0)<<16;
+ *pwritten = written;
+
+ return NT_STATUS_OK;
+}
+
+struct cli_writeall_state {
+ struct event_context *ev;
+ struct cli_state *cli;
+ uint16_t fnum;
+ uint16_t mode;
+ const uint8_t *buf;
+ off_t offset;
+ size_t size;
+ size_t written;
+};
+
+static void cli_writeall_written(struct async_req *req);
+
+static struct async_req *cli_writeall_send(TALLOC_CTX *mem_ctx,
+ struct event_context *ev,
+ struct cli_state *cli,
+ uint16_t fnum,
+ uint16_t mode,
+ const uint8_t *buf,
+ off_t offset, size_t size)
+{
+ struct async_req *result;
+ struct async_req *subreq;
+ struct cli_writeall_state *state;
+
+ if (!async_req_setup(mem_ctx, &result, &state,
+ struct cli_writeall_state)) {
+ return NULL;
+ }
+ state->ev = ev;
+ state->cli = cli;
+ state->fnum = fnum;
+ state->mode = mode;
+ state->buf = buf;
+ state->offset = offset;
+ state->size = size;
+ state->written = 0;
+
+ subreq = cli_write_andx_send(state, state->ev, state->cli, state->fnum,
+ state->mode, state->buf, state->offset,
+ state->size);
+ if (subreq == NULL) {
+ goto fail;
+ }
+
+ subreq->async.fn = cli_writeall_written;
+ subreq->async.priv = result;
+ return result;
+
+ fail:
+ TALLOC_FREE(result);
+ return NULL;
+}
+
+static void cli_writeall_written(struct async_req *subreq)
+{
+ struct async_req *req = talloc_get_type_abort(
+ subreq->async.priv, struct async_req);
+ struct cli_writeall_state *state = talloc_get_type_abort(
+ req->private_data, struct cli_writeall_state);
+ NTSTATUS status;
+ size_t written, to_write;
+
+ status = cli_write_andx_recv(subreq, &written);
+ TALLOC_FREE(subreq);
+ if (!NT_STATUS_IS_OK(status)) {
+ async_req_nterror(req, status);
+ return;
+ }
+
+ state->written += written;
+
+ if (state->written > state->size) {
+ async_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
+ return;
+ }
+
+ to_write = state->size - state->written;
+
+ if (to_write == 0) {
+ async_req_done(req);
+ return;
+ }
+
+ subreq = cli_write_andx_send(state, state->ev, state->cli, state->fnum,
+ state->mode,
+ state->buf + state->written,
+ state->offset + state->written, to_write);
+ if (subreq == NULL) {
+ async_req_nterror(req, NT_STATUS_NO_MEMORY);
+ return;
+ }
+
+ subreq->async.fn = cli_writeall_written;
+ subreq->async.priv = req;
+}
+
+static NTSTATUS cli_writeall_recv(struct async_req *req)
+{
+ return async_req_simple_recv_ntstatus(req);
+}
+
+struct cli_push_state {
+ struct async_req *req;
+
+ struct event_context *ev;
+ struct cli_state *cli;
+ uint16_t fnum;
+ uint16_t mode;
+ off_t start_offset;
+ size_t window_size;
+
+ size_t (*source)(uint8_t *buf, size_t n, void *priv);
+ void *priv;
+
+ size_t chunk_size;
+
+ size_t sent;
+ bool eof;
+
+ /*
+ * Outstanding requests
+ */
+ int num_reqs;
+ struct async_req **reqs;
+
+ int pending;
+
+ uint8_t *buf;
+};
+
+static void cli_push_written(struct async_req *req);
+
+struct async_req *cli_push_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
+ struct cli_state *cli,
+ uint16_t fnum, uint16_t mode,
+ off_t start_offset, size_t window_size,
+ size_t (*source)(uint8_t *buf, size_t n,
+ void *priv),
+ void *priv)
+{
+ struct async_req *result;
+ struct cli_push_state *state;
+ int i;
+
+ if (!async_req_setup(mem_ctx, &result, &state,
+ struct cli_push_state)) {
+ return NULL;
+ }
+ state->req = result;
+
+ state->cli = cli;
+ state->ev = ev;
+ state->fnum = fnum;
+ state->start_offset = start_offset;
+ state->mode = mode;
+ state->source = source;
+ state->priv = priv;
+ state->eof = false;
+ state->sent = 0;
+ state->pending = 0;
+
+ state->chunk_size = cli_write_max_bufsize(cli, mode);
+
+ state->num_reqs = MAX(window_size/state->chunk_size, 1);
+ state->num_reqs = MIN(state->num_reqs, cli->max_mux);
+
+ state->reqs = TALLOC_ZERO_ARRAY(state, struct async_req *,
+ state->num_reqs);
+ if (state->reqs == NULL) {
+ goto failed;
+ }
+
+ state->buf = TALLOC_ARRAY(
+ state, uint8_t, state->chunk_size * state->num_reqs);
+ if (state->buf == NULL) {
+ goto failed;
+ }
+
+ for (i=0; i<state->num_reqs; i++) {
+ size_t to_write;
+ uint8_t *buf = state->buf + i*state->chunk_size;
+
+ to_write = state->source(buf, state->chunk_size, state->priv);
+ if (to_write == 0) {
+ state->eof = true;
+ break;
+ }
+
+ state->reqs[i] = cli_writeall_send(
+ state->reqs, state->ev, state->cli, state->fnum,
+ state->mode, buf, state->start_offset + state->sent,
+ to_write);
+ if (state->reqs[i] == NULL) {
+ goto failed;
+ }
+
+ state->reqs[i]->async.fn = cli_push_written;
+ state->reqs[i]->async.priv = state;
+
+ state->sent += to_write;
+ state->pending += 1;
+ }
+
+ if (i == 0) {
+ if (!async_post_ntstatus(result, ev, NT_STATUS_OK)) {
+ goto failed;
+ }
+ return result;
+ }
+
+ return result;
+
+ failed:
+ TALLOC_FREE(result);
+ return NULL;
+}
+
+static void cli_push_written(struct async_req *req)
+{
+ struct cli_push_state *state = talloc_get_type_abort(
+ req->async.priv, struct cli_push_state);
+ NTSTATUS status;
+ int i;
+ uint8_t *buf;
+ size_t to_write;
+
+ for (i=0; i<state->num_reqs; i++) {
+ if (state->reqs[i] == req) {
+ break;
+ }
+ }
+
+ if (i == state->num_reqs) {
+ async_req_nterror(state->req, NT_STATUS_INTERNAL_ERROR);
+ return;
+ }
+
+ status = cli_writeall_recv(req);
+ TALLOC_FREE(state->reqs[i]);
+ req = NULL;
+ if (!NT_STATUS_IS_OK(status)) {
+ async_req_nterror(state->req, status);
+ return;
+ }
+
+ state->pending -= 1;
+ if (state->pending == 0) {
+ async_req_done(state->req);
+ return;
+ }
+
+ if (state->eof) {
+ return;
+ }
+
+ buf = state->buf + i * state->chunk_size;
+
+ to_write = state->source(buf, state->chunk_size, state->priv);
+ if (to_write == 0) {
+ state->eof = true;
+ return;
+ }
+
+ state->reqs[i] = cli_writeall_send(
+ state->reqs, state->ev, state->cli, state->fnum,
+ state->mode, buf, state->start_offset + state->sent, to_write);
+ if (state->reqs[i] == NULL) {
+ async_req_nterror(state->req, NT_STATUS_NO_MEMORY);
+ return;
+ }
+
+ state->reqs[i]->async.fn = cli_push_written;
+ state->reqs[i]->async.priv = state;
+
+ state->sent += to_write;
+ state->pending += 1;
+}
+
+NTSTATUS cli_push_recv(struct async_req *req)
+{
+ return async_req_simple_recv_ntstatus(req);
+}
+
+NTSTATUS cli_push(struct cli_state *cli, uint16_t fnum, uint16_t mode,
+ off_t start_offset, size_t window_size,
+ size_t (*source)(uint8_t *buf, size_t n, void *priv),
+ void *priv)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ struct event_context *ev;
+ struct async_req *req;
+ NTSTATUS result = NT_STATUS_NO_MEMORY;
+
+ if (cli->fd_event != NULL) {
+ /*
+ * Can't use sync call while an async call is in flight
+ */
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ ev = event_context_init(frame);
+ if (ev == NULL) {
+ goto nomem;
+ }
+
+ req = cli_push_send(frame, ev, cli, fnum, mode, start_offset,
+ window_size, source, priv);
+ if (req == NULL) {
+ goto nomem;
+ }
+
+ while (req->state < ASYNC_REQ_DONE) {
+ event_loop_once(ev);
+ }
+
+ result = cli_push_recv(req);
+ nomem:
+ TALLOC_FREE(frame);
+ return result;
+}
git.samba.org / jra / samba / .git / blobdiff