BLK_START_REQUEST(9) Block Devices BLK_START_REQUEST(9)NAME
blk_start_request - start request processing on the driver
SYNOPSIS
void blk_start_request(struct request * req);
ARGUMENTS
req
request to dequeue
DESCRIPTION
Dequeue req and start timeout timer on it. This hands off the request to the driver.
Block internal functions which don't want to start timer should call blk_dequeue_request.
CONTEXT
queue_lock must be held.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 BLK_START_REQUEST(9)
Check Out this Related Man Page
WebKDC(3pm) User Contributed Perl Documentation WebKDC(3pm)NAME
WebKDC - functions to support the WebKDC
SYNOPSIS
use WebAuth;
use WebKDC;
use WebKDC::Exception;
use WebKDC::WebRequest;
use WebKDC::WebResponse;
my ($status, $exception) =
WebKDC::make_request_token_request($req, $resp);
DESCRIPTION
WebKDC is a set of convenience functions built on top of mod WebAuth to implement the WebKDC.
All functions have the potential to throw either a WebKDC::WebKDCException or WebAuth::Exception.
EXPORT
None
FUNCTIONS
make_request_token_request(req,resp)
($status, $e) = WebKDC::make_request_token_request($req, $resp);
Used to handle an incoming request token. It should be used in the following fashion:
my $req = new WebKDC::WebRequest;
my $resp = new WebKDC::WebResponse;
# if the user just submitted their username/password, include them
if ($username && $password) {
$req->user($username);
$req->pass($password);
}
# pass in any proxy-tokens we have from a cookies
# i.e., enumerate through all cookies that start with webauth_wpt
# and put them into a hash:
# $cookies = { "webauth_wpt_krb5" => $cookie_value }
$req->proxy_cookies($cookies);
# $req_token_str and $service_token_str would normally get
# passed in via query/post parameters
$req->request_token($req_token_str);
$req->service_token($service_token_str);
my ($status, $e) = WebKDC::make_request_token_request($req, $resp);
# for all these cases, check if $resp->proxy_cookies() has any
# proxy cookies we need to update when sending back a page to
# the browser
if ($status == WK_SUCCESS) {
# ok, request successful
} elsif ($status == WK_ERR_USER_AND_PASS_REQUIRED
|| $status == WK_LOGIN_FORCED) {
# prompt for user/pass
} elsif ($status == WK_ERR_LOGIN_FAILED) {
# supplied user/pass was invalid, try again
} else {
# use this if/elsif/else to pick the error message
if ($status == WK_ERR_UNRECOVERABLE_ERROR) {
# something nasty happened.
} elsif ($status == WK_ERR_REQUEST_TOKEN_STATLE) {
# user took too long to login, original request token is stale
} elsif ($status == WK_ERR_WEBAUTH_SERVER_ERROR) {
# like WK_ERR_UNRECOVERABLE_ERROR, but indicates the error
# most likely is due to the webauth server making the request,
} else {
# treat like WK_ERROR_UNRECOVERABLE ERROR
}
# display the error message and don't prompt anymore
}
AUTHOR
Roland Schemers (schemers@stanford.edu)
SEE ALSO
WebKDC::WebKDCException WebKDC::Token WebKDC::WebRequest WebKDC::WebRespsonse WebAuth.
perl v5.14.2 2012-04-25 WebKDC(3pm)
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