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-rw-r--r--source3/libsmb/clireadwrite.c61
1 files changed, 36 insertions, 25 deletions
diff --git a/source3/libsmb/clireadwrite.c b/source3/libsmb/clireadwrite.c
index 1c2a0d56c4..e0a2d21870 100644
--- a/source3/libsmb/clireadwrite.c
+++ b/source3/libsmb/clireadwrite.c
@@ -36,6 +36,41 @@ static size_t cli_read_max_bufsize(struct cli_state *cli)
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;
+}
+
+
/*
* Send a read&x request
*/
@@ -614,31 +649,7 @@ ssize_t cli_write(struct cli_state *cli,
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) &&
- (strcmp(cli->dev, "LPT1:") != 0)) {
-
- /* Printer devices are restricted to max_xmit
- * writesize in Vista and XPSP3. */
-
- 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;