ViewVC Help

View File | Revision Log | Show Annotations | View Changeset | Root Listing

root/svn/ircd-hybrid/trunk/src/whowas.c

Comparing:
ircd-hybrid-7.3/src/whowas.c (file contents), Revision 1029 by michael, Sun Nov 8 13:10:50 2009 UTC vs.
ircd-hybrid/trunk/src/whowas.c (file contents), Revision 7441 by michael, Thu Mar 10 20:21:20 2016 UTC

#	Line 1 | Line 1
1		/*
2	<	*  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3	<	*  whowas.c: WHOWAS user cache.
2	>	*  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3		*
4	<	*  Copyright (C) 2005 by the past and present ircd coders, and others.
4	>	*  Copyright (c) 1997-2016 ircd-hybrid development team
5		*
6		*  This program is free software; you can redistribute it and/or modify
7		*  it under the terms of the GNU General Public License as published by
#	Line 16 | Line 15
15		*
16		*  You should have received a copy of the GNU General Public License
17		*  along with this program; if not, write to the Free Software
18	<	*  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
18	>	*  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19		*  USA
20	<	*
21	<	*  $Id$
20	>	*/
21	>
22	>	/*! \file whowas.c
23	>	* \brief WHOWAS user cache.
24	>	* \version $Id$
25		*/
26
27		#include "stdinc.h"
28	+	#include "list.h"
29	+	#include "mempool.h"
30		#include "whowas.h"
31		#include "client.h"
28	–	#include "common.h"
32		#include "hash.h"
33		#include "irc_string.h"
34		#include "ircd.h"
32	–	#include "ircd_defs.h"
33	–	#include "numeric.h"
34	–	#include "s_serv.h"
35	–	#include "s_user.h"
35		#include "send.h"
36	<	#include "s_conf.h"
37	<	#include "memory.h"
36	>	#include "conf.h"
37	>
38
39	<	/* internally defined function */
41	<	static void add_whowas_to_clist(struct Whowas **, struct Whowas *);
42	<	static void del_whowas_from_clist(struct Whowas **, struct Whowas *);
43	<	static void add_whowas_to_list(struct Whowas **, struct Whowas *);
44	<	static void del_whowas_from_list(struct Whowas **, struct Whowas *);
39	>	static mp_pool_t *whowas_pool;
40
41	<	struct Whowas WHOWAS[NICKNAMEHISTORYLENGTH];
42	<	struct Whowas *WHOWASHASH[HASHSIZE];
41	>	static dlink_list whowas_list;  /*! Chain of struct Whowas pointers */
42	>	dlink_list WHOWASHASH[HASHSIZE];
43
49	–	static unsigned int whowas_next = 0;
44
45	+	/*! \brief Initializes the whowas memory pool
46	+	*/
47		void
48	<	add_history(struct Client *client_p, int online)
48	>	whowas_init(void)
49		{
50	<	struct Whowas *who = &WHOWAS[whowas_next];
50	>	whowas_pool = mp_pool_new(sizeof(struct Membership), MP_CHUNK_SIZE_WHOWAS);
51	>	}
52
53	<	assert(client_p && client_p->servptr);
53	>	/*! \brief Unlinks a Whowas struct from its associated lists.
54	>	* \param whowas Pointer to Whowas struct to be unlinked
55	>	*/
56	>	static struct Whowas *
57	>	whowas_unlink(struct Whowas *whowas)
58	>	{
59	>	if (!whowas)  /* Can be NULL. */
60	>	return NULL;
61
62	<	if (who->hashv != -1)
63	<	{
60	<	if (who->online)
61	<	del_whowas_from_clist(&(who->online->whowas),who);
62	<	del_whowas_from_list(&WHOWASHASH[who->hashv], who);
63	<	}
62	>	if (whowas->online)
63	>	dlinkDelete(&whowas->cnode, &whowas->online->whowas);
64
65	<	who->hashv = strhash(client_p->name);
66	<	who->logoff = CurrentTime;
65	>	dlinkDelete(&whowas->tnode, &WHOWASHASH[whowas->hashv]);
66	>	dlinkDelete(&whowas->lnode, &whowas_list);
67
68	<	/* NOTE: strcpy ok here, the sizes in the client struct MUST
69	<	* match the sizes in the whowas struct
70	<	*/
71	<	strlcpy(who->name, client_p->name, sizeof(who->name));
72	<	strcpy(who->username, client_p->username);
73	<	strcpy(who->hostname, client_p->host);
74	<	strcpy(who->realname, client_p->info);
68	>	return whowas;
69	>	}
70
71	<	strlcpy(who->servername, client_p->servptr->name, sizeof(who->servername));
71	>	/*! \brief Unlinks a Whowas struct from its associated lists
72	>	*         and returns memory back to the pooling allocator.
73	>	* \param whowas Pointer to Whowas struct to be unlinked and freed
74	>	*/
75	>	static void
76	>	whowas_free(struct Whowas *whowas)
77	>	{
78	>	whowas_unlink(whowas);
79	>	mp_pool_release(whowas);
80	>	}
81
82	<	if (online)
83	<	{
84	<	who->online = client_p;
85	<	add_whowas_to_clist(&(client_p->whowas), who);
86	<	}
87	<	else
88	<	who->online = NULL;
82	>	/*! \brief Returns a Whowas struct for further use. Either allocates
83	>	*         a new one, or returns the oldest entry from the whowas_list
84	>	*         if it ran over ConfigGeneral.whowas_history_length
85	>	*/
86	>	static struct Whowas *
87	>	whowas_make(void)
88	>	{
89	>	struct Whowas *whowas;
90
91	<	add_whowas_to_list(&WHOWASHASH[who->hashv], who);
92	<	whowas_next++;
91	>	if (dlink_list_length(&whowas_list) >= ConfigGeneral.whowas_history_length)
92	>	whowas = whowas_unlink(whowas_list.tail->data);  /* Re-use oldest item */
93	>	else
94	>	whowas = mp_pool_get(whowas_pool);
95
96	<	if (whowas_next == NICKNAMEHISTORYLENGTH)
90	<	whowas_next = 0;
96	>	return whowas;
97		}
98
99	+	/*! \brief Trims the whowas_list if necessary until there are no
100	+	*         more than ConfigGeneral.whowas_history_length Whowas
101	+	*         struct items.
102	+	*/
103		void
104	<	off_history(struct Client *client_p)
104	>	whowas_trim(void)
105		{
106	<	struct Whowas *temp, *next;
97	<
98	<	for (temp = client_p->whowas; temp; temp=next)
106	>	while (dlink_list_length(&whowas_list) >= ConfigGeneral.whowas_history_length)
107		{
108	<	next = temp->cnext;
109	<	temp->online = NULL;
110	<	del_whowas_from_clist(&(client_p->whowas), temp);
108	>	if (!whowas_list.tail->data)
109	>	return;  /* whowas_list is now empty. No more items can be freed. */
110	>
111	>	whowas_free(whowas_list.tail->data);
112		}
113		}
114
115	<	struct Client *
116	<	get_history(const char *nick, time_t timelimit)
115	>	/*! \brief Adds the currently defined name of the client to history.
116	>	*         Usually called before changing to a new name (nick).
117	>	*         Client must be a fully registered user.
118	>	* \param client_p pointer to Client struct to add
119	>	* \param online   either 1 if it's a nick change or 0 on client exit
120	>	*/
121	>	void
122	>	whowas_add_history(struct Client *client_p, const int online)
123		{
124	<	struct Whowas *temp;
124	>	struct Whowas *whowas = whowas_make();
125
126	<	timelimit = CurrentTime - timelimit;
127	<	temp = WHOWASHASH[strhash(nick)];
126	>	if (!whowas)  /* Can be NULL. */
127	>	return;
128
129	<	for (; temp; temp = temp->next)
115	<	{
116	<	if (irccmp(nick, temp->name))
117	<	continue;
118	<	if (temp->logoff < timelimit)
119	<	continue;
120	<	return(temp->online);
121	<	}
129	>	assert(IsClient(client_p));
130
131	<	return(NULL);
132	<	}
131	>	whowas->hashv = strhash(client_p->name);
132	>	whowas->shide = IsHidden(client_p->servptr) != 0;
133	>	whowas->logoff = CurrentTime;
134	>
135	>	strlcpy(whowas->account, client_p->account, sizeof(whowas->account));
136	>	strlcpy(whowas->name, client_p->name, sizeof(whowas->name));
137	>	strlcpy(whowas->username, client_p->username, sizeof(whowas->username));
138	>	strlcpy(whowas->hostname, client_p->host, sizeof(whowas->hostname));
139	>	strlcpy(whowas->sockhost, client_p->sockhost, sizeof(whowas->sockhost));
140	>	strlcpy(whowas->realname, client_p->info, sizeof(whowas->realname));
141	>	strlcpy(whowas->servername, client_p->servptr->name, sizeof(whowas->servername));
142
143	<	void
127	<	count_whowas_memory(unsigned int *wwu, uint64_t *wwum)
128	<	{
129	<	const struct Whowas *tmp;
130	<	int i;
131	<	unsigned int u = 0;
132	<	uint64_t um = 0;
133	<
134	<	/* count the number of used whowas structs in 'u'   */
135	<	/* count up the memory used of whowas structs in um */
136	<	for (i = 0, tmp = &WHOWAS[0]; i < NICKNAMEHISTORYLENGTH; ++i, ++tmp)
143	>	if (online)
144		{
145	<	if (tmp->hashv != -1)
146	<	{
140	<	++u;
141	<	um += sizeof(struct Whowas);
142	<	}
145	>	whowas->online = client_p;
146	>	dlinkAdd(whowas, &whowas->cnode, &client_p->whowas);
147		}
148	+	else
149	+	whowas->online = NULL;
150
151	<	*wwu = u;
152	<	*wwum = um;
151	>	dlinkAdd(whowas, &whowas->tnode, &WHOWASHASH[whowas->hashv]);
152	>	dlinkAdd(whowas, &whowas->lnode, &whowas_list);
153		}
154
155	+	/*! \brief This must be called when the client structure is about to
156	+	*         be released. History mechanism keeps pointers to client
157	+	*         structures and it must know when they cease to exist.
158	+	* \param client_p pointer to Client struct
159	+	*/
160		void
161	<	init_whowas(void)
161	>	whowas_off_history(struct Client *client_p)
162		{
163	<	int i;
153	<
154	<	for (i = 0; i < NICKNAMEHISTORYLENGTH; i++)
163	>	while (client_p->whowas.head)
164		{
165	<	memset(&WHOWAS[i], 0, sizeof(struct Whowas));
157	<	WHOWAS[i].hashv = -1;
158	<	}
165	>	struct Whowas *whowas = client_p->whowas.head->data;
166
167	<	for (i = 0; i < HASHSIZE; ++i)
168	<	WHOWASHASH[i] = NULL;
167	>	whowas->online = NULL;
168	>	dlinkDelete(&whowas->cnode, &client_p->whowas);
169	>	}
170		}
171
172	<	static void
173	<	add_whowas_to_clist(struct Whowas **bucket, struct Whowas *whowas)
172	>	/*! \brief Returns the current client that was using the given
173	>	*         nickname within the timelimit. Returns NULL, if no
174	>	*         one found.
175	>	* \param name      name of the nick
176	>	* \param timelimit maximum age for a client since log-off
177	>	*/
178	>	struct Client *
179	>	whowas_get_history(const char *name, uintmax_t timelimit)
180		{
181	<	whowas->cprev = NULL;
181	>	dlink_node *node = NULL;
182
183	<	if ((whowas->cnext = *bucket) != NULL)
170	<	whowas->cnext->cprev = whowas;
171	<	*bucket = whowas;
172	<	}
173	<
174	<	static void
175	<	del_whowas_from_clist(struct Whowas **bucket, struct Whowas *whowas)
176	<	{
177	<	if (whowas->cprev)
178	<	whowas->cprev->cnext = whowas->cnext;
179	<	else
180	<	*bucket = whowas->cnext;
181	<	if (whowas->cnext)
182	<	whowas->cnext->cprev = whowas->cprev;
183	<	}
183	>	timelimit = CurrentTime - timelimit;
184
185	<	static void
186	<	add_whowas_to_list(struct Whowas **bucket, struct Whowas *whowas)
187	<	{
188	<	whowas->prev = NULL;
185	>	DLINK_FOREACH(node, WHOWASHASH[strhash(name)].head)
186	>	{
187	>	struct Whowas *whowas = node->data;
188
189	<	if ((whowas->next = *bucket) != NULL)
190	<	whowas->next->prev = whowas;
191	<	*bucket = whowas;
189	>	if (whowas->logoff < timelimit)
190	>	continue;
191	>	if (irccmp(name, whowas->name))
192	>	continue;
193	>	return whowas->online;
194	>	}
195	>
196	>	return NULL;
197		}
198	<
199	<	static void
200	<	del_whowas_from_list(struct Whowas **bucket, struct Whowas *whowas)
198	>
199	>	/*! \brief For debugging. Counts allocated structures stored in whowas_list
200	>	*/
201	>	void
202	>	whowas_count_memory(unsigned int *const count, size_t *const bytes)
203		{
204	<	if (whowas->prev)
205	<	whowas->prev->next = whowas->next;
200	<	else
201	<	*bucket = whowas->next;
202	<	if (whowas->next)
203	<	whowas->next->prev = whowas->prev;
204	>	(*count) = dlink_list_length(&whowas_list);
205	>	(*bytes) = dlink_list_length(&whowas_list) * sizeof(struct Whowas);
206		}

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines (old)
>	Changed lines (new)