#include <linux/ceph/ceph_debug.h>

#include <linux/err.h>
#include <linux/module.h>
#include <linux/random.h>
#include <linux/slab.h>

#include <linux/ceph/decode.h>
#include <linux/ceph/auth.h>

#include "auth_none.h"

static void reset(struct ceph_auth_client *ac)
{
	struct ceph_auth_none_info *xi = ac->private;

	xi->starting = true;
}

static void destroy(struct ceph_auth_client *ac)
{
	kfree(ac->private);
	ac->private = NULL;
}

static int is_authenticated(struct ceph_auth_client *ac)
{
	struct ceph_auth_none_info *xi = ac->private;

	return !xi->starting;
}

static int should_authenticate(struct ceph_auth_client *ac)
{
	struct ceph_auth_none_info *xi = ac->private;

	return xi->starting;
}

static int ceph_auth_none_build_authorizer(struct ceph_auth_client *ac,
					   struct ceph_none_authorizer *au)
{
	void *p = au->buf;
	void *const end = p + sizeof(au->buf);
	int ret;

	ceph_encode_8_safe(&p, end, 1, e_range);
	ret = ceph_auth_entity_name_encode(ac->name, &p, end);
	if (ret < 0)
		return ret;

	ceph_encode_64_safe(&p, end, ac->global_id, e_range);
	au->buf_len = p - (void *)au->buf;
	dout("%s built authorizer len %d\n", __func__, au->buf_len);
	return 0;

e_range:
	return -ERANGE;
}

static int build_request(struct ceph_auth_client *ac, void *buf, void *end)
{
	return 0;
}

/*
 * the generic auth code decode the global_id, and we carry no actual
 * authenticate state, so nothing happens here.
 */
static int handle_reply(struct ceph_auth_client *ac, int result,
			void *buf, void *end)
{
	struct ceph_auth_none_info *xi = ac->private;

	xi->starting = false;
	return result;
}

static void ceph_auth_none_destroy_authorizer(struct ceph_authorizer *a)
{
	kfree(a);
}

/*
 * build an 'authorizer' with our entity_name and global_id.  it is
 * identical for all services we connect to.
 */
static int ceph_auth_none_create_authorizer(
	struct ceph_auth_client *ac, int peer_type,
	struct ceph_auth_handshake *auth)
{
	struct ceph_none_authorizer *au;
	int ret;

	au = kmalloc(sizeof(*au), GFP_NOFS);
	if (!au)
		return -ENOMEM;

	au->base.destroy = ceph_auth_none_destroy_authorizer;

	ret = ceph_auth_none_build_authorizer(ac, au);
	if (ret) {
		kfree(au);
		return ret;
	}

	auth->authorizer = (struct ceph_authorizer *) au;
	auth->authorizer_buf = au->buf;
	auth->authorizer_buf_len = au->buf_len;
	auth->authorizer_reply_buf = au->reply_buf;
	auth->authorizer_reply_buf_len = sizeof (au->reply_buf);

	return 0;
}

static const struct ceph_auth_client_ops ceph_auth_none_ops = {
	.name = "none",
	.reset = reset,
	.destroy = destroy,
	.is_authenticated = is_authenticated,
	.should_authenticate = should_authenticate,
	.build_request = build_request,
	.handle_reply = handle_reply,
	.create_authorizer = ceph_auth_none_create_authorizer,
};

int ceph_auth_none_init(struct ceph_auth_client *ac)
{
	struct ceph_auth_none_info *xi;

	dout("ceph_auth_none_init %p\n", ac);
	xi = kzalloc(sizeof(*xi), GFP_NOFS);
	if (!xi)
		return -ENOMEM;

	xi->starting = true;

	ac->protocol = CEPH_AUTH_NONE;
	ac->private = xi;
	ac->ops = &ceph_auth_none_ops;
	return 0;
}

4e4f6b6cae7'>util</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/util/c++?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>c++</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/util/c++/clang.h?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>clang.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;</td><td class='right'>2017-01-30 19:27:10 -0500</td></tr>
<tr><th>committer</th><td>Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;</td><td class='right'>2017-01-31 09:13:49 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/util/c++/clang.h?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>79c6f448c8b79c321e4a1f31f98194e4f6b6cae7</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/perf/util/c++/clang.h?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>370efda701f03cccf21e02bb1fdd3b852547d75c</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/perf/util/c++/clang.h?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>tools/perf/util/c++/clang.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/util/c++/clang.h?id=0c744ea4f77d72b3dcebb7a8f2684633ec79be88'>0c744ea4f77d72b3dcebb7a8f2684633ec79be88</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/util/c++/clang.h?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7&amp;id2=0c744ea4f77d72b3dcebb7a8f2684633ec79be88'>diff</a>)</td></tr></table>
<div class='commit-subject'>tracing: Fix hwlat kthread migration</div><div class='commit-msg'>The hwlat tracer creates a kernel thread at start of the tracer. It is
pinned to a single CPU and will move to the next CPU after each period of
running. If the user modifies the migration thread's affinity, it will not
change after that happens.

The original code created the thread at the first instance it was called,
but later was changed to destroy the thread after the tracer was finished,
and would not be created until the next instance of the tracer was
established. The code that initialized the affinity was only called on the
initial instantiation of the tracer. After that, it was not initialized, and
the previous affinity did not match the current newly created one, making
it appear that the user modified the thread's affinity when it did not, and
the thread failed to migrate again.

Cc: stable@vger.kernel.org
Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs")
Signed-off-by: Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>Diffstat</a> (limited to 'tools/perf/util/c++/clang.h')</div><table summary='diffstat' class='diffstat'>