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Code

Factor out cli_write_max_bufsize

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This commit is contained in:
Volker Lendecke 2008-12-13 13:46:28 +01:00
parent 7c3497ef5e
commit 42e407b300
1 changed files with 36 additions and 25 deletions
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61
source3/libsmb/clireadwrite.c
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@ -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;