+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ *
+ * Copyright (C) 2001-2003 Cluster File Systems, Inc.
+ *
+ * This file is part of Lustre, http://www.lustre.org.
+ *
+ * Lustre is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * Lustre is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef EXPORT_SYMTAB
+# define EXPORT_SYMTAB
+#endif
+#define DEBUG_SUBSYSTEM S_MDS
+
+#include <linux/module.h>
+#include <linux/lustre_mds.h>
+#include <linux/lustre_dlm.h>
+#include <linux/lustre_fsfilt.h>
+#include <linux/init.h>
+#include <linux/obd_class.h>
+#include <linux/fs.h>
+#include <linux/namei.h>
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
+# include <linux/smp_lock.h>
+# include <linux/buffer_head.h>
+# include <linux/workqueue.h>
+# include <linux/mount.h>
+#else
+# include <linux/locks.h>
+#endif
+#include <linux/lustre_audit.h>
+#include "mds_internal.h"
+
+
+#define PP_FILE 1
+#define PP_DIR 2
+#define PP_SPLIT_MASTER 3
+#define PP_SPLIT_SLAVE 4
+#define PP_CROSS_DIR 5
+#define PP_AUDIT_LOG 6 /* search id in audit log */
+
+struct scan_dir_data {
+ int rc;
+ struct lustre_id *id;
+ char *name;
+};
+
+static int filldir(void *__buf, const char *name, int namlen,
+ loff_t offset, ino_t ino, unsigned int d_type)
+{
+ struct scan_dir_data *sd = __buf;
+ ENTRY;
+
+ if (name[0] == '.' &&
+ (namlen == 1 || (namlen == 2 && name[1] == '.'))) {
+ /* skip special entries */
+ RETURN(0);
+ }
+
+ LASSERT(sd != NULL);
+
+ if (ino == id_ino(sd->id)) {
+ strncpy(sd->name, name, namlen);
+ sd->rc = 0;
+ RETURN(-EINTR); /* break the readdir loop */
+ }
+ RETURN(0);
+}
+
+int
+scan_name_in_parent(struct lustre_id *pid, struct lustre_id *id, char *name)
+{
+ struct file * file;
+ char *pname;
+ struct scan_dir_data sd;
+ int len, rc = 0;
+ ENTRY;
+
+ len = strlen("__iopen__/") + 10 + 1;
+ OBD_ALLOC(pname, len);
+ if (!pname)
+ RETURN(-ENOMEM);
+
+ sprintf(pname, "__iopen__/0x%llx", id_ino(pid));
+
+ file = filp_open(pname, O_RDONLY, 0);
+ if (IS_ERR(file)) {
+ CERROR("can't open directory %s: %d\n",
+ pname, (int) PTR_ERR(file));
+ GOTO(out, rc = PTR_ERR(file));
+ }
+
+ sd.id = id;
+ sd.name = name;
+ sd.rc = -ENOENT;
+ vfs_readdir(file, filldir, &sd);
+
+ filp_close(file, 0);
+ rc = sd.rc;
+
+out:
+ OBD_FREE(pname, len);
+ RETURN(rc);
+
+}
+
+/* id2pid - given id, get parent id or master id.
+ * @obd: obd device
+ * @id: child id to be parsed
+ * @pid: parent id or master id
+ * @type: id type
+ */
+static int
+id2pid(struct obd_device *obd, struct lustre_id *id, struct lustre_id *pid,
+ __u32 *type)
+{
+ struct dentry *dentry = NULL;
+ struct inode *inode = NULL;
+ struct mea *mea = NULL;
+ int mea_size, rc = 0;
+ ENTRY;
+
+ dentry = mds_id2dentry(obd, id, NULL);
+ if (IS_ERR(dentry) || !dentry->d_inode) {
+ CERROR("can't find inode "LPU64"\n", id_ino(id));
+ if (!IS_ERR(dentry)) l_dput(dentry);
+ RETURN(-ENOENT);
+ }
+ inode = dentry->d_inode;
+
+ if (S_ISDIR(id_type(id))) {
+ LASSERT(S_ISDIR(inode->i_mode));
+ rc = mds_md_get_attr(obd, inode, &mea, &mea_size);
+ if (rc)
+ GOTO(out, rc);
+
+ if (!mea) {
+ *type = PP_DIR;
+ goto read_pid;
+ } else if (mea && mea->mea_count) {
+ *type = PP_SPLIT_MASTER;
+ goto read_pid;
+ } else {
+ *type = PP_SPLIT_SLAVE;
+ *pid = mea->mea_ids[mea->mea_master];
+ }
+
+ } else {
+ LASSERT(!S_ISDIR(inode->i_mode));
+ *type = PP_FILE;
+read_pid:
+ rc = mds_read_inode_pid(obd, inode, pid);
+ if (rc) {
+ CERROR("can't read parent ino(%lu) rc(%d).\n",
+ inode->i_ino, rc);
+ GOTO(out, rc);
+ }
+ }
+
+ /* Well, if it's dir or master split, we have to check if it's
+ * a cross-ref dir */
+ if ((*type == PP_DIR || *type == PP_SPLIT_MASTER) &&
+ id_group(id) != id_group(pid))
+ *type = PP_CROSS_DIR;
+out:
+ if (mea)
+ OBD_FREE(mea, mea_size);
+ l_dput(dentry);
+ RETURN(rc);
+}
+
+static int local_parse_id(struct obd_device *obd, struct parseid_pkg *pkg)
+{
+ struct lvfs_run_ctxt saved;
+ int rc = 0;
+ ENTRY;
+
+ pkg->pp_rc = 0;
+ pkg->pp_type = 0;
+ memset(pkg->pp_name, 0, sizeof(pkg->pp_name));
+
+ LASSERT(obd->u.mds.mds_num == id_group(&pkg->pp_id1));
+
+ /* pp_id2 is present, which indicating we want to scan parent
+ * dir(pp_id2) to find the cross-ref entry(pp_id1) */
+ if (id_fid(&pkg->pp_id2)) {
+ LASSERT(S_ISDIR(id_type(&pkg->pp_id1)));
+ LASSERT(S_ISDIR(id_type(&pkg->pp_id2)));
+
+ pkg->pp_type = PP_DIR;
+ goto scan;
+ }
+
+ rc = id2pid(obd, &pkg->pp_id1, &pkg->pp_id2, &pkg->pp_type);
+ if (rc)
+ GOTO(out, rc);
+scan:
+ push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+
+ switch (pkg->pp_type) {
+ case PP_FILE:
+ case PP_DIR:
+ case PP_SPLIT_MASTER:
+ rc = scan_name_in_parent(&pkg->pp_id2, &pkg->pp_id1,
+ pkg->pp_name);
+ if (rc)
+ CERROR("scan "LPU64" in parent failed. rc=%d\n",
+ id_ino(&pkg->pp_id1), rc);
+ break;
+ case PP_SPLIT_SLAVE:
+ case PP_CROSS_DIR:
+ break;
+ default:
+ CERROR("invalid id\n");
+ break;
+ }
+
+ pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+out:
+ pkg->pp_rc = rc;
+ RETURN(rc);
+}
+
+static int
+local_scan_audit_log(struct obd_device *obd, struct parseid_pkg *pkg);
+
+int mds_parse_id(struct ptlrpc_request *req)
+{
+ struct parseid_pkg *pkg, *reppkg;
+ struct obd_device *obd = req->rq_export->exp_obd;
+ int rc = 0, size = sizeof(*reppkg);
+ ENTRY;
+
+ pkg = lustre_swab_reqbuf(req, 0, sizeof(*pkg),
+ lustre_swab_parseid_pkg);
+ if (pkg == NULL)
+ RETURN(-EPROTO);
+
+ rc = lustre_pack_reply(req, 1, &size, NULL);
+ if (rc)
+ RETURN(rc);
+
+ reppkg = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reppkg));
+ memcpy(reppkg, pkg, sizeof(*reppkg));
+
+ if (reppkg->pp_type == PP_AUDIT_LOG)
+ rc = local_scan_audit_log(obd, reppkg);
+ else
+ rc = local_parse_id(obd, reppkg);
+
+ if (rc)
+ CERROR("local parseid failed. (rc:%d)\n", rc);
+ RETURN(0); /* we do need pack reply here */
+}
+
+static int parse_id(struct obd_device *obd, struct parseid_pkg *pkg)
+{
+ int rc = 0;
+ int mds_num = id_group(&pkg->pp_id1);
+ ENTRY;
+
+ LASSERT(mds_num >= 0);
+
+ if (mds_num == obd->u.mds.mds_num) {
+ rc = local_parse_id(obd, pkg);
+ } else {
+ struct ptlrpc_request *req;
+ struct lmv_obd *lmv = &obd->u.mds.mds_md_obd->u.lmv;
+ struct parseid_pkg *body;
+ int size = sizeof(*body);
+ struct obd_export *exp = lmv->tgts[mds_num].ltd_exp;
+
+ req = ptlrpc_prep_req(class_exp2cliimp(exp),
+ LUSTRE_MDS_VERSION, MDS_PARSE_ID, 1,
+ &size, NULL);
+ if (!req)
+ RETURN(-ENOMEM);
+
+ body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
+ memcpy(body, pkg, sizeof(*body));
+
+ req->rq_replen = lustre_msg_size(1, &size);
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ GOTO(out, rc);
+
+ body = lustre_swab_repbuf(req, 0, sizeof(*body),
+ lustre_swab_parseid_pkg);
+ if (body == NULL) {
+ CERROR("can't unpack parseid_pkg\n");
+ GOTO(out, rc = -EPROTO);
+ }
+ memcpy(pkg, body, sizeof(*pkg));
+out:
+ ptlrpc_req_finished(req);
+ }
+ RETURN(rc);
+}
+
+struct name_item {
+ struct list_head link;
+ char name[NAME_MAX + 1];
+};
+
+int
+mds_id2name(struct obd_device *obd, struct lustre_id *id,
+ struct lustre_id *rootid, struct list_head *list,
+ struct lustre_id *lastid)
+{
+ struct name_item *item;
+ struct parseid_pkg *pkg;
+ int rc = 0;
+ ENTRY;
+
+ OBD_ALLOC(pkg, sizeof(*pkg));
+ if (pkg == NULL)
+ RETURN(-ENOMEM);
+
+ pkg->pp_id1 = *id;
+ while (!id_equal(&pkg->pp_id1, rootid)) {
+
+ rc = parse_id(obd, pkg);
+ if (rc) {
+ CDEBUG(D_SEC, "parse id failed. rc=%d\n", rc);
+ *lastid = pkg->pp_id1;
+ break;
+ }
+
+ switch (pkg->pp_type) {
+ case PP_FILE:
+ case PP_DIR:
+ case PP_SPLIT_MASTER:
+ OBD_ALLOC(item, sizeof(*item));
+ if (item == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ INIT_LIST_HEAD(&item->link);
+ list_add(&item->link, list);
+ memcpy(item->name, pkg->pp_name, sizeof(item->name));
+
+ case PP_SPLIT_SLAVE:
+ pkg->pp_id1 = pkg->pp_id2;
+ memset(&pkg->pp_id2, 0, sizeof(struct lustre_id));
+ break;
+ case PP_CROSS_DIR:
+ break;
+ default:
+ LBUG();
+ break;
+ }
+
+ }
+out:
+ OBD_FREE(pkg, sizeof(*pkg));
+ RETURN(rc);
+}
+
+static int
+scan_audit_log_cb(struct llog_handle *llh, struct llog_rec_hdr *rec, void *data)
+{
+ struct parseid_pkg *pkg = (struct parseid_pkg *)data;
+ struct audit_record *ad_rec;
+ struct audit_id_record *cid_rec, *pid_rec;
+ struct audit_name_record *nm_rec;
+ ENTRY;
+
+ if (!(le32_to_cpu(llh->lgh_hdr->llh_flags) & LLOG_F_IS_PLAIN)) {
+ CERROR("log is not plain\n");
+ RETURN(-EINVAL);
+ }
+ if (rec->lrh_type != SMFS_AUDIT_NAME_REC &&
+ rec->lrh_type != LLOG_GEN_REC) {
+ RETURN(0);
+ }
+
+ ad_rec = (struct audit_record *)((char *)rec + sizeof(*rec));
+
+ if (ad_rec->result ||
+ ad_rec->opcode != AUDIT_UNLINK ||
+ ad_rec->opcode != AUDIT_RENAME)
+ RETURN(0);
+
+ cid_rec = (struct audit_id_record *)((char *)ad_rec + sizeof(*ad_rec));
+ pid_rec = cid_rec + 1;
+ nm_rec = (struct audit_name_record *)
+ ((char *)pid_rec + sizeof(*pid_rec));
+
+ if (cid_rec->au_num == id_ino(&pkg->pp_id1) &&
+ cid_rec->au_gen == id_gen(&pkg->pp_id1)) {
+ /* get parent id */
+ id_ino(&pkg->pp_id2) = pid_rec->au_num;
+ id_gen(&pkg->pp_id2) = pid_rec->au_gen;
+ id_type(&pkg->pp_id2) = pid_rec->au_type;
+ id_fid(&pkg->pp_id2) = pid_rec->au_fid;
+ id_group(&pkg->pp_id2) = pid_rec->au_mds;
+ /* get name */
+ memcpy(pkg->pp_name, nm_rec->name,
+ le32_to_cpu(nm_rec->name_len));
+
+ RETURN(LLOG_PROC_BREAK);
+ }
+ RETURN(0);
+}
+
+static int
+local_scan_audit_log(struct obd_device *obd, struct parseid_pkg *pkg)
+{
+ struct llog_handle *llh = NULL;
+ struct llog_ctxt *ctxt = llog_get_context(&obd->obd_llogs,
+ LLOG_AUDIT_ORIG_CTXT);
+ int rc = 0;
+ ENTRY;
+
+ if (ctxt)
+ llh = ctxt->loc_handle;
+
+ if (llh == NULL)
+ RETURN(-ENOENT);
+
+ rc = llog_cat_process(llh, (llog_cb_t)&scan_audit_log_cb, (void *)pkg);
+ if (rc != LLOG_PROC_BREAK) {
+ CWARN("process catalog log failed: rc(%d)\n", rc);
+ RETURN(-ENOENT);
+ }
+ RETURN(0);
+}
+
+static int
+scan_audit_log(struct obd_device *obd, struct lustre_id *cur_id,
+ struct list_head *list, struct lustre_id *parent_id)
+{
+ struct name_item *item = NULL;
+ int rc = 0, mds_num = id_group(cur_id);
+ struct parseid_pkg *pkg = NULL;
+ ENTRY;
+
+ OBD_ALLOC(pkg, sizeof(*pkg));
+ if (pkg == NULL)
+ RETURN(-ENOMEM);
+
+ pkg->pp_type = PP_AUDIT_LOG;
+ pkg->pp_id1 = *cur_id;
+
+ if (obd->u.mds.mds_num == mds_num) {
+ rc = local_scan_audit_log(obd, pkg);
+ } else {
+ struct ptlrpc_request *req;
+ struct lmv_obd *lmv = &obd->u.mds.mds_md_obd->u.lmv;
+ struct parseid_pkg *body;
+ int size = sizeof(*body);
+ struct obd_export *exp = lmv->tgts[mds_num].ltd_exp;
+
+ req = ptlrpc_prep_req(class_exp2cliimp(exp),
+ LUSTRE_MDS_VERSION, MDS_PARSE_ID, 1,
+ &size, NULL);
+ if (!req)
+ RETURN(-ENOMEM);
+
+ body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
+ memcpy(body, pkg, sizeof(*body));
+
+ req->rq_replen = lustre_msg_size(1, &size);
+
+ rc = ptlrpc_queue_wait(req);
+ if (rc)
+ GOTO(out_req, rc);
+
+ body = lustre_swab_repbuf(req, 0, sizeof(*body),
+ lustre_swab_parseid_pkg);
+ if (body == NULL) {
+ CERROR("can't unpack parseid_pkg\n");
+ GOTO(out, rc = -EPROTO);
+ }
+ memcpy(pkg, body, sizeof(*pkg));
+out_req:
+ ptlrpc_req_finished(req);
+
+ }
+
+ if (!rc) rc = pkg->pp_rc;
+ if (rc)
+ GOTO(out, rc);
+
+ *parent_id = pkg->pp_id2;
+
+ OBD_ALLOC(item, sizeof(*item));
+ if (item == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ INIT_LIST_HEAD(&item->link);
+ list_add(&item->link, list);
+ memcpy(item->name, pkg->pp_name, sizeof(item->name));
+out:
+ OBD_FREE(pkg, sizeof(*pkg));
+ RETURN(rc);
+}
+
+int
+mds_audit_id2name(struct obd_device *obd, char **name, int *namelen,
+ struct lustre_id *id)
+{
+ int rc = 0;
+ struct list_head list, *pos, *n;
+ struct name_item *item;
+ struct lustre_id parent_id, cur_id, rootid;
+ ENTRY;
+
+ *namelen = 0;
+ INIT_LIST_HEAD(&list);
+
+ if (obd->u.mds.mds_num) {
+ int valsize = sizeof(rootid);
+ rc = obd_get_info(obd->u.mds.mds_md_exp, strlen("rootid"),
+ "rootid", &valsize, &rootid);
+ if (rc) {
+ CERROR("cann't get rootid!\n");
+ RETURN(rc);
+ }
+ } else {
+ rootid = obd->u.mds.mds_rootid;
+ }
+
+ cur_id = *id;
+ if (id_equal(&cur_id, &rootid))
+ RETURN(0);
+next:
+ memset(&parent_id, 0, sizeof(parent_id));
+
+ rc = mds_id2name(obd, &cur_id, &rootid, &list, &parent_id);
+ if (rc == -ENOENT) {
+ /* can't reconstruct name from id, turn to audit log */
+ LASSERT(id_fid(&parent_id));
+ cur_id = parent_id;
+ memset(&parent_id, 0, sizeof(parent_id));
+
+ rc = scan_audit_log(obd, &cur_id, &list, &parent_id);
+ if (rc) {
+ CERROR("scan id in audit log failed. (rc:%d)\n", rc);
+ GOTO(out, rc);
+ }
+
+ LASSERT(id_fid(&parent_id));
+ cur_id = parent_id;
+ goto next;
+
+ } else if (rc) {
+ CERROR("reconstruct name from id failed. (rc:%d)\n", rc);
+ GOTO(out, rc);
+ }
+
+ list_for_each_safe (pos, n, &list) {
+ item = list_entry(pos, struct name_item, link);
+ *namelen += strlen(item->name) + 1;
+ }
+ OBD_ALLOC(*name, *namelen);
+ if (*name == NULL)
+ rc = -ENOMEM;
+out:
+ list_for_each_safe (pos, n, &list) {
+ item = list_entry(pos, struct name_item, link);
+ if (!rc) {
+ strcat(*name, "/");
+ strcat(*name, item->name);
+ }
+ list_del_init(&item->link);
+ OBD_FREE(item, sizeof(*item));
+ }
+ RETURN(rc);
+}
+EXPORT_SYMBOL(mds_audit_id2name);
git://git.whamcloud.com / fs / lustre-release.git / commitdiff