1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * lustre/smfs/audit_transfer.c
6 * Copyright (C) 2004 Cluster File Systems, Inc.
8 * This file is part of Lustre, http://www.lustre.org.
10 * Lustre is free software; you can redistribute it and/or
11 * modify it under the terms of version 2 of the GNU General Public
12 * License as published by the Free Software Foundation.
14 * Lustre is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with Lustre; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 # define EXPORT_SYMTAB
27 #define DEBUG_SUBSYSTEM S_SM
30 #include <linux/slab.h>
31 #include <linux/obd_class.h>
32 #include <linux/obd_support.h>
33 #include <linux/lustre_lib.h>
34 #include <linux/lustre_idl.h>
35 #include <linux/lustre_fsfilt.h>
36 #include <linux/lustre_smfs.h>
37 #include <linux/lustre_audit.h>
38 #include <linux/lustre_log.h>
39 #include "smfs_internal.h"
41 struct transfer_item {
42 struct llog_handle *ti_llh;
43 struct list_head ti_link;
47 #define TRANSFERD_STOP 0
48 struct transferd_ctl {
49 unsigned long tc_flags;
50 wait_queue_head_t tc_waitq;
51 struct completion tc_starting;
52 struct completion tc_stopping;
54 struct list_head tc_list;
58 static struct transferd_ctl transferd_tc;
59 static DECLARE_MUTEX(transferd_sem);
60 static int transferd_users = 0;
63 int audit_notify(struct llog_handle *llh, void * arg)
65 struct transfer_item *ti;
69 if (transferd_users == 0) {
75 if (test_bit(TRANSFERD_STOP, &transferd_tc.tc_flags)) {
76 CDEBUG(D_INFO, "transfer daemon stopped\n");
80 OBD_ALLOC(ti, sizeof(*ti));
84 INIT_LIST_HEAD(&ti->ti_link);
88 spin_lock(&transferd_tc.tc_lock);
89 list_add_tail(&ti->ti_link, &transferd_tc.tc_list);
90 spin_unlock(&transferd_tc.tc_lock);
92 wake_up(&transferd_tc.tc_waitq);
97 const char *opstr[AUDIT_MAX] = {
99 [AUDIT_CREATE] "create",
101 [AUDIT_UNLINK] "unlink",
102 [AUDIT_SYMLINK] "symlink",
103 [AUDIT_RENAME] "rename",
104 [AUDIT_SETATTR] "setattr",
105 [AUDIT_WRITE] "write",
110 [AUDIT_READLINK] "readlink",
111 [AUDIT_READDIR] "readdir",
114 #define construct_header(buf, size, rec, id_rec) \
115 snprintf(buf, size, "AUDIT:"LPX64":%u/%u:%s:%d:"DLID4":", \
116 rec->nid, rec->uid, rec->gid, opstr[rec->opcode], (__s16)rec->result,\
117 (unsigned long)id_rec->au_fid, (unsigned long)id_rec->au_mds, \
118 (unsigned long)id_rec->au_num, (unsigned long)id_rec->au_gen);
120 #define REC2ID(rec, id) { \
121 id_ino(id) = rec->au_num; \
122 id_gen(id) = rec->au_gen; \
123 id_type(id) = rec->au_type; \
124 id_fid(id) = rec->au_fid; \
125 id_group(id) = rec->au_mds; \
129 transfer_record(struct obd_device *obd, struct audit_record *rec, int type, void * data)
131 struct audit_id_record *id_rec =
132 (struct audit_id_record *)((char *)rec + sizeof(*rec));
133 struct audit_name_record *name_rec = NULL;
134 int (*audit_id2name)(struct obd_device *obd, char **name,
135 int *namelen, struct lustre_id *id) = data;
140 CDEBUG(D_INFO, "transfer %s\n", opstr[rec->opcode]);
142 memset(buf, 0, PAGE_SIZE);
143 n = construct_header(buf, PAGE_SIZE, rec, id_rec);
150 if (type != SMFS_AUDIT_NAME_REC)
165 rc = audit_id2name(obd, &name, &namelen, &id);
167 strncat(buf, "unknown", PAGE_SIZE - n);
168 n += strlen("unknown");
169 } else if (namelen == 0) {
171 if (type != SMFS_AUDIT_NAME_REC)
174 strncat(buf, name, PAGE_SIZE - n);
176 OBD_FREE(name, namelen);
180 if (type == SMFS_AUDIT_NAME_REC) {
181 name_rec = (struct audit_name_record *)((char *)(++id_rec));
182 strncat(buf, "/", 1);
184 strncat(buf, name_rec->name, PAGE_SIZE - n);
187 CDEBUG(D_INFO, "%s\n", buf);
194 static int transfer_cb(struct llog_handle *llh, struct llog_rec_hdr *rec,
197 struct obd_device *obd = llh->lgh_ctxt->loc_obd;
198 struct audit_record *ad_rec;
202 if (!(le32_to_cpu(llh->lgh_hdr->llh_flags) & LLOG_F_IS_PLAIN)) {
203 CERROR("log is not plain\n");
206 if (rec->lrh_type != cpu_to_le32(SMFS_AUDIT_GEN_REC) &&
207 rec->lrh_type != cpu_to_le32(SMFS_AUDIT_NAME_REC)) {
208 CERROR("log record type error\n");
212 ad_rec = (struct audit_record *)((char *)rec + sizeof(*rec));
214 LASSERT(ad_rec->opcode < AUDIT_MAX);
216 transfer_record(obd, ad_rec, rec->lrh_type, data);
218 RETURN(LLOG_DEL_RECORD);
221 static int audit_transfer(struct transfer_item *ti)
223 struct llog_handle *llh = ti->ti_llh;
227 rc = llog_cat_process(llh, (llog_cb_t)&transfer_cb, ti->id2name);
229 CERROR("process catalog log failed: rc(%d)\n", rc);
234 static int transferd_check(struct transferd_ctl *tc)
239 if (test_bit(TRANSFERD_STOP, &tc->tc_flags))
242 spin_lock(&tc->tc_lock);
243 rc = list_empty(&tc->tc_list) ? 0 : 1;
244 spin_unlock(&tc->tc_lock);
249 static int transferd(void *arg)
251 struct transferd_ctl *tc = arg;
253 struct list_head *pos, *tmp;
254 struct transfer_item *ti = NULL;
259 /* ptlrpc_daemonize() */
261 lustre_daemonize_helper();
265 SIGNAL_MASK_LOCK(current, flags);
266 sigfillset(¤t->blocked);
268 SIGNAL_MASK_UNLOCK(current, flags);
269 THREAD_NAME(current->comm, sizeof(current->comm) - 1, "%s",
273 complete(&tc->tc_starting);
275 LASSERT(buf == NULL);
276 OBD_ALLOC(buf, PAGE_SIZE);
277 LASSERT(buf != NULL);
280 struct l_wait_info lwi = { 0 };
282 l_wait_event(tc->tc_waitq, transferd_check(tc), &lwi);
284 if (test_bit(TRANSFERD_STOP, &tc->tc_flags))
287 spin_lock(&tc->tc_lock);
288 LASSERT(!list_empty(&tc->tc_list));
289 ti = list_entry(tc->tc_list.next, struct transfer_item, ti_link);
290 list_del_init(&ti->ti_link);
291 spin_unlock(&tc->tc_lock);
294 OBD_FREE(ti, sizeof(*ti));
298 OBD_FREE(buf, PAGE_SIZE);
300 spin_lock(&tc->tc_lock);
301 list_for_each_safe(pos, tmp, &tc->tc_list) {
302 ti = list_entry(pos, struct transfer_item, ti_link);
303 list_del_init(&ti->ti_link);
304 OBD_FREE(ti, sizeof(*ti));
306 spin_unlock(&tc->tc_lock);
308 complete(&tc->tc_stopping);
312 int audit_start_transferd()
317 down(&transferd_sem);
318 if (++transferd_users != 1)
321 memset(&transferd_tc, 0, sizeof(transferd_tc));
322 init_completion(&transferd_tc.tc_starting);
323 init_completion(&transferd_tc.tc_stopping);
324 init_waitqueue_head(&transferd_tc.tc_waitq);
325 transferd_tc.tc_flags = 0;
326 INIT_LIST_HEAD(&transferd_tc.tc_list);
327 spin_lock_init(&transferd_tc.tc_lock);
329 if (kernel_thread(transferd, &transferd_tc, 0) < 0) {
331 GOTO(out, rc = -ECHILD);
334 wait_for_completion(&transferd_tc.tc_starting);
340 int audit_stop_transferd(void)
345 down(&transferd_sem);
346 if (--transferd_users > 0)
349 set_bit(TRANSFERD_STOP, &transferd_tc.tc_flags);
350 wake_up(&transferd_tc.tc_waitq);
351 wait_for_completion(&transferd_tc.tc_stopping);