1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * lustre/smfs/audit_mds.c
5 * Lustre filesystem audit part for MDS
7 * Copyright (C) 2004 Cluster File Systems, Inc.
9 * This file is part of Lustre, http://www.lustre.org.
11 * Lustre is free software; you can redistribute it and/or
12 * modify it under the terms of version 2 of the GNU General Public
13 * License as published by the Free Software Foundation.
15 * Lustre is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with Lustre; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 # define EXPORT_SYMTAB
28 #define DEBUG_SUBSYSTEM S_SM
30 #include <linux/kmod.h>
31 #include <linux/init.h>
33 #include <linux/slab.h>
34 #include <linux/obd_class.h>
35 #include <linux/obd_support.h>
36 #include <linux/lustre_lib.h>
37 #include <linux/lustre_idl.h>
38 #include <linux/lustre_fsfilt.h>
39 #include <linux/lustre_smfs.h>
40 #include <linux/lustre_audit.h>
41 #include <linux/lustre_log.h>
42 #include "smfs_internal.h"
44 static audit_op hook2audit(hook_op hook)
46 audit_op opcode = AUDIT_UNKNOWN;
64 return AUDIT_READLINK;
91 struct inode * get_inode_from_hook(hook_op hook, void * msg)
99 struct hook_link_msg * m = msg;
100 inode = m->dentry->d_inode;
106 struct hook_unlink_msg * m = msg;
107 inode = m->dentry->d_inode;
112 struct hook_symlink_msg * m = msg;
113 inode = m->dentry->d_inode;
118 struct hook_rename_msg * m = msg;
119 inode = m->dentry->d_inode;
129 static inline int smfs_get_inode_audit(struct inode *inode, __u64 *mask)
131 struct fsfilt_operations *fsfilt = S2SMI(inode->i_sb)->sm_cache_fsfilt;
132 struct smfs_inode_info * smi = I2SMI(inode);
135 if (smi->au_info.au_valid)
136 *mask = smi->au_info.au_mask;
138 rc = fsfilt->fs_get_xattr(I2CI(inode), AUDIT_ATTR_EA, mask, sizeof(*mask));
141 smi->au_info.au_valid = 1;
142 smi->au_info.au_mask = *mask;
147 /* is called also from fsfilt_smfs_get_info */
148 int smfs_get_audit(struct super_block * sb, struct inode * parent,
149 struct inode * inode, __u64 * mask)
151 struct smfs_super_info * smb = S2SMI(sb);
152 struct obd_device * obd = smb->smsi_exp->exp_obd;
153 struct audit_priv * priv = NULL;
157 if (!SMFS_IS(smb->plg_flags, SMFS_PLG_AUDIT))
160 priv = smfs_get_plg_priv(S2SMI(sb), SMFS_PLG_AUDIT);
162 /* omit __iopen__ dir */
163 if (parent->i_ino == SMFS_IOPEN_INO)
169 if (IS_AUDIT(priv->a_mask)) {
170 /* no audit for directories on OSS */
171 if (inode && S_ISDIR(inode->i_mode) &&
172 !strcmp(obd->obd_type->typ_name, OBD_FILTER_DEVICENAME))
174 (*mask) = priv->a_mask;
177 /* get inode audit EA */
178 smfs_get_inode_audit(parent, mask);
179 /* check if parent has audit */
186 smfs_get_inode_audit(inode, mask);
193 int smfs_audit_check(struct inode * parent, hook_op hook, int ret,
194 struct audit_priv * priv, void * msg)
202 if (hook == HOOK_SPECIAL) {
203 struct audit_info * info = msg;
207 code = hook2audit(hook);
209 rc = smfs_get_audit(parent->i_sb, parent,
210 get_inode_from_hook(hook, msg),
214 //should only failures be audited?
215 if (ret >= 0 && IS_AUDIT_OP(mask, AUDIT_FAIL))
219 RETURN(IS_AUDIT_OP(mask, code));
222 static int smfs_set_fs_audit (struct super_block * sb, __u64 *mask)
224 struct smfs_super_info * smb = S2SMI(sb);
225 struct fsfilt_operations * fsfilt = smb->sm_fsfilt;
228 struct file * f = NULL;
229 struct audit_priv *priv;
230 struct lvfs_run_ctxt * ctxt, saved;
233 ctxt = &smb->smsi_exp->exp_obd->obd_lvfs_ctxt;
235 priv = smfs_get_plg_priv(smb, SMFS_PLG_AUDIT);
237 CERROR("Audit is not initialized, use mountoptions 'audit'\n");
241 push_ctxt(&saved, ctxt, NULL);
243 f = filp_open(AUDIT_ATTR_FILE, O_RDWR|O_CREAT, 0600);
245 CERROR("cannot get audit_setting file\n");
250 rc = fsfilt->fs_write_record(f, mask, sizeof(*mask), &off, 1);
252 CERROR("error writting audit setting: rc = %d\n", rc);
256 priv->a_mask = (*mask);
262 pop_ctxt(&saved, ctxt, NULL);
267 //set audit attributes for directory/file
268 int smfs_set_audit(struct super_block * sb, struct inode * inode,
271 void * handle = NULL;
272 struct fsfilt_operations * fsfilt = S2SMI(sb)->sm_fsfilt;
273 struct smfs_inode_info *smi = NULL;
278 if (IS_AUDIT_OP((*mask), AUDIT_FS))
279 return smfs_set_fs_audit(sb, mask);
283 handle = fsfilt->fs_start(inode, FSFILT_OP_SETATTR, NULL, 0);
285 RETURN(PTR_ERR(handle));
287 if (fsfilt->fs_set_xattr)
288 rc = fsfilt->fs_set_xattr(inode, handle, AUDIT_ATTR_EA,
289 mask, sizeof(*mask));
290 /* save audit EA in inode_info */
292 smi->au_info.au_mask = *mask;
293 smi->au_info.au_valid = 1;
296 fsfilt->fs_commit(inode->i_sb, inode, handle, 1);
301 static int smfs_audit_post_op(hook_op code, struct inode * inode, void * msg,
305 char * buffer = NULL;
306 struct audit_record * rec = NULL;
307 struct llog_rec_hdr * llh;
308 struct timeval cur_time;
309 struct audit_priv * priv = arg;
310 audit_get_op * handler = priv->audit_get_record;
312 //check that we are in lustre ctxt
313 if (!SMFS_IS(I2SMI(inode)->smi_flags, SMFS_PLG_AUDIT))
316 if (!handler || !handler[code])
319 if (smfs_audit_check(inode, code, ret, priv, msg) == 0)
324 do_gettimeofday(&cur_time);
326 OBD_ALLOC(buffer, PAGE_SIZE);
332 rec = (void*)(buffer + sizeof(*llh));
335 rec->uid = current->uid;
336 rec->gid = current->gid;
337 rec->nid = current->user->nid;
338 rec->time = cur_time.tv_sec * USEC_PER_SEC + cur_time.tv_usec;
340 len = handler[code](inode, msg, priv, (char*)rec,
343 LASSERT(llh->lrh_type == SMFS_AUDIT_GEN_REC ||
344 llh->lrh_type == SMFS_AUDIT_NAME_REC);
346 llh->lrh_len = size_round(len);
348 rc = llog_cat_add_rec(priv->audit_ctxt->loc_handle, llh, NULL,
349 (void*)rec, NULL, NULL);
351 CERROR("Error adding audit record: %d\n", rc);
354 audit_notify(priv->audit_ctxt->loc_handle, priv->au_id2name);
357 OBD_FREE(buffer, PAGE_SIZE);
363 static int smfs_trans_audit (struct super_block *sb, void *arg,
364 struct audit_priv * priv)
366 int size = 1; //one record in log per operation.
371 extern int mds_alloc_inode_ids(struct obd_device *, struct inode *,
372 void *, struct lustre_id *, struct lustre_id *);
374 static int smfs_start_audit(struct super_block *sb, void *arg,
375 struct audit_priv * audit_p)
377 struct smfs_super_info * smb = S2SMI(sb);
378 struct fsfilt_operations * fsfilt = smb->sm_fsfilt;
379 struct obd_device *obd = arg;
385 //is plugin already activated
386 if (SMFS_IS(smb->plg_flags, SMFS_PLG_AUDIT))
389 rc = audit_start_transferd();
391 CERROR("can't start audit transfer daemon. rc:%d\n", rc);
395 if (obd && obd->obd_type && obd->obd_type->typ_name) {
396 if (!strcmp(obd->obd_type->typ_name, "mds")) {
397 CDEBUG(D_INODE, "Setup MDS audit handler\n");
398 audit_mds_setup(obd, sb, audit_p);
400 else if (!strcmp(obd->obd_type->typ_name, "obdfilter")) {
401 CDEBUG(D_INODE, "Setup OST audit handler\n");
402 audit_ost_setup(obd, sb, audit_p);
405 CDEBUG(D_INODE, "Unknown obd type %s\n",
406 obd->obd_type->typ_name);
410 //read fs audit settings if any
411 audit_p->a_mask = AUDIT_OFF;
413 f = filp_open(AUDIT_ATTR_FILE, O_RDONLY, 0644);
416 rc = fsfilt->fs_read_record(f, &audit_p->a_mask,
417 sizeof(audit_p->a_mask), &off);
419 CERROR("error reading audit setting: rc = %d\n", rc);
424 SMFS_SET(smb->plg_flags, SMFS_PLG_AUDIT);
429 int smfs_stop_audit(struct super_block *sb, void *arg,
430 struct audit_priv * audit_p)
432 struct smfs_super_info * smb = S2SMI(sb);
433 struct llog_ctxt *ctxt = audit_p->audit_ctxt;
436 if (!SMFS_IS(smb->plg_flags, SMFS_PLG_AUDIT))
439 audit_stop_transferd();
441 SMFS_CLEAR(smb->plg_flags, SMFS_PLG_AUDIT);
444 ctxt->loc_llogs->llog_ctxt[LLOG_AUDIT_ORIG_CTXT] = NULL;
446 llog_catalog_cleanup(ctxt);
447 OBD_FREE(ctxt, sizeof(*ctxt));
448 audit_p->audit_ctxt = NULL;
453 int smfs_audit_set_info(struct super_block *sb, void *arg,
454 struct audit_priv *priv) {
455 struct plg_info_msg * msg = arg;
456 if (KEY_IS(msg->key, "id2name")) {
457 priv->au_id2name = msg->val;
463 typedef int (*audit_helper)(struct super_block * sb, void *msg, struct audit_priv *);
464 static audit_helper smfs_audit_helpers[PLG_HELPER_MAX] = {
465 [PLG_START] smfs_start_audit,
466 [PLG_STOP] smfs_stop_audit,
467 [PLG_TRANS_SIZE] smfs_trans_audit,
468 [PLG_TEST_INODE] NULL,
469 [PLG_SET_INODE] NULL,
470 [PLG_SET_INFO] smfs_audit_set_info,
473 static int smfs_audit_help_op(int code, struct super_block * sb,
474 void * arg, void * priv)
478 if (smfs_audit_helpers[code])
479 rc = smfs_audit_helpers[code](sb, arg, (struct audit_priv *) priv);
483 static int smfs_exit_audit(struct super_block *sb,
486 struct audit_priv * priv = arg;
487 struct smfs_plugin * plg;
490 plg = smfs_deregister_plugin(sb, SMFS_PLG_AUDIT);
492 OBD_FREE(plg, sizeof(*plg));
494 CERROR("Cannot find AUDIT plugin while unregistering\n");
497 OBD_FREE(priv, sizeof(*priv));
502 int smfs_init_audit(struct super_block *sb)
505 struct audit_priv * priv = NULL;
506 struct smfs_plugin * plg = NULL;
510 OBD_ALLOC(plg, sizeof(*plg));
516 plg->plg_type = SMFS_PLG_AUDIT;
517 plg->plg_post_op = &smfs_audit_post_op;
518 plg->plg_helper = &smfs_audit_help_op;
519 plg->plg_exit = &smfs_exit_audit;
521 OBD_ALLOC(priv, sizeof(*priv));
527 plg->plg_private = priv;
528 rc = smfs_register_plugin(sb, plg);
533 OBD_FREE(priv, sizeof(*priv));
536 OBD_FREE(plg, sizeof(*plg));
542 int audit_client_log(struct super_block * sb, struct audit_msg * msg)
544 struct smfs_super_info * smb = S2SMI(sb);
545 char *buffer = NULL, *pbuf = NULL;
546 struct audit_record * rec = NULL;
547 struct llog_rec_hdr * llh;
548 struct llog_handle * ll_handle = NULL;
550 struct timeval cur_time;
552 struct audit_priv * priv;
556 do_gettimeofday(&cur_time);
558 priv = smfs_get_plg_priv(smb, SMFS_PLG_AUDIT);
562 ll_handle = priv->audit_ctxt->loc_handle;
564 OBD_ALLOC(buffer, PAGE_SIZE);
569 llh->lrh_type = SMFS_AUDIT_GEN_REC;
572 rec = (void*)buffer + sizeof(*llh);
573 rec->opcode = msg->code;
574 rec->result = msg->result;
578 rec->time = cur_time.tv_sec * USEC_PER_SEC + cur_time.tv_usec;
580 pbuf = (char*)rec + len;
582 CDEBUG(D_VFSTRACE, "AUDITLOG:"DLID4"\n", OLID4(&msg->id));
583 /* check id is valid */
584 LASSERT(id_ino(&msg->id));
585 LASSERT(id_fid(&msg->id));
586 //LASSERT(id_type(&msg->id) & S_IFMT);
594 len += audit_rec_from_id(&pbuf, &msg->id);
597 CERROR("Unknown code %i in audit_msg\n", msg->code);
600 llh->lrh_len = size_round(len);
602 rc = llog_cat_add_rec(ll_handle, llh, NULL, (void*)rec, NULL, NULL);
604 CERROR("Error adding audit client record: %d\n", rc);
607 audit_notify(ll_handle, priv->au_id2name);
610 OBD_FREE(buffer, PAGE_SIZE);