llog_ioctl.c

来自「lustre 1.6.5 source code」· C语言 代码 · 共 453 行 · 第 1/2 页

/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
 * vim:expandtab:shiftwidth=8:tabstop=8:
 *
 *  Copyright (C) 2005 Cluster File Systems, Inc.
 *
 *   This file is part of the Lustre file system, http://www.lustre.org
 *   Lustre is a trademark of Cluster File Systems, Inc.
 *
 *   You may have signed or agreed to another license before downloading
 *   this software.  If so, you are bound by the terms and conditions
 *   of that agreement, and the following does not apply to you.  See the
 *   LICENSE file included with this distribution for more information.
 *
 *   If you did not agree to a different license, then this copy of Lustre
 *   is open source 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.
 *
 *   In either case, 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
 *   license text for more details.
 */

#define DEBUG_SUBSYSTEM S_LOG

#ifndef EXPORT_SYMTAB
#define EXPORT_SYMTAB
#endif

#include <obd_class.h>
#include <lustre_log.h>
#include <libcfs/list.h>
#include "llog_internal.h"

static int str2logid(struct llog_logid *logid, char *str, int len)
{
        char *start, *end, *endp;

        ENTRY;
        start = str;
        if (*start != '#')
                RETURN(-EINVAL);

        start++;
        if (start - str >= len - 1)
                RETURN(-EINVAL);
        end = strchr(start, '#');
        if (end == NULL || end == start)
                RETURN(-EINVAL);

        *end = '\0';
        logid->lgl_oid = simple_strtoull(start, &endp, 0);
        if (endp != end)
                RETURN(-EINVAL);

        start = ++end;
        if (start - str >= len - 1)
                RETURN(-EINVAL);
        end = strchr(start, '#');
        if (end == NULL || end == start)
                RETURN(-EINVAL);

        *end = '\0';
        logid->lgl_ogr = simple_strtoull(start, &endp, 0);
        if (endp != end)
                RETURN(-EINVAL);

        start = ++end;
        if (start - str >= len - 1)
                RETURN(-EINVAL);
        logid->lgl_ogen = simple_strtoul(start, &endp, 16);
        if (*endp != '\0')
                RETURN(-EINVAL);

        RETURN(0);
}

static int llog_check_cb(struct llog_handle *handle, struct llog_rec_hdr *rec,
                         void *data)
{
        struct obd_ioctl_data *ioc_data = (struct obd_ioctl_data *)data;
        static int l, remains, from, to;
        static char *out;
        char *endp;
        int cur_index, rc = 0;

        ENTRY;
        cur_index = rec->lrh_index;

        if (ioc_data && (ioc_data->ioc_inllen1)) {
                l = 0;
                remains = ioc_data->ioc_inllen4 +
                        size_round(ioc_data->ioc_inllen1) +
                        size_round(ioc_data->ioc_inllen2) +
                        size_round(ioc_data->ioc_inllen3);
                from = simple_strtol(ioc_data->ioc_inlbuf2, &endp, 0);
                if (*endp != '\0')
                        RETURN(-EINVAL);
                to = simple_strtol(ioc_data->ioc_inlbuf3, &endp, 0);
                if (*endp != '\0')
                        RETURN(-EINVAL);
                ioc_data->ioc_inllen1 = 0;
                out = ioc_data->ioc_bulk;
                if (cur_index < from)
                        RETURN(0);
                if (to > 0 && cur_index > to)
                        RETURN(-LLOG_EEMPTY);
        }
        if (handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT) {
                struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
                struct llog_handle *log_handle;

                if (rec->lrh_type != LLOG_LOGID_MAGIC) {
                        l = snprintf(out, remains, "[index]: %05d  [type]: "
                                     "%02x  [len]: %04d failed\n",
                                     cur_index, rec->lrh_type,
                                     rec->lrh_len);
                }
                if (handle->lgh_ctxt == NULL)
                        RETURN(-EOPNOTSUPP);
                rc = llog_cat_id2handle(handle, &log_handle, &lir->lid_id);
                if (rc) {
                        CDEBUG(D_IOCTL,
                               "cannot find log #"LPX64"#"LPX64"#%08x\n",
                               lir->lid_id.lgl_oid, lir->lid_id.lgl_ogr,
                               lir->lid_id.lgl_ogen);
                        RETURN(rc);
                }
                rc = llog_process(log_handle, llog_check_cb, NULL, NULL);
                llog_close(log_handle);
        } else {
                switch (rec->lrh_type) {
                case OST_SZ_REC:
                case OST_RAID1_REC:
                case MDS_UNLINK_REC:
                case MDS_SETATTR_REC:
                case OBD_CFG_REC:
                case LLOG_HDR_MAGIC: {
                         l = snprintf(out, remains, "[index]: %05d  [type]: "
                                      "%02x  [len]: %04d ok\n",
                                      cur_index, rec->lrh_type,
                                      rec->lrh_len);
                         out += l;
                         remains -= l;
                         if (remains <= 0) {
                                CERROR("no space to print log records\n");
                                RETURN(-LLOG_EEMPTY);
                         }
                         RETURN(0);
                }
                default: {
                         l = snprintf(out, remains, "[index]: %05d  [type]: "
                                      "%02x  [len]: %04d failed\n",
                                      cur_index, rec->lrh_type,
                                      rec->lrh_len);
                         out += l;
                         remains -= l;
                         if (remains <= 0) {
                                CERROR("no space to print log records\n");
                                RETURN(-LLOG_EEMPTY);
                         }
                         RETURN(0);
                }
                }
        }
        RETURN(rc);
}

static int llog_print_cb(struct llog_handle *handle, struct llog_rec_hdr *rec,
                         void *data)
{
        struct obd_ioctl_data *ioc_data = (struct obd_ioctl_data *)data;
        static int l, remains, from, to;
        static char *out;
        char *endp;
        int cur_index;

        ENTRY;
        if (ioc_data->ioc_inllen1) {
                l = 0;
                remains = ioc_data->ioc_inllen4 +
                        size_round(ioc_data->ioc_inllen1) +
                        size_round(ioc_data->ioc_inllen2) +
                        size_round(ioc_data->ioc_inllen3);
                from = simple_strtol(ioc_data->ioc_inlbuf2, &endp, 0);
                if (*endp != '\0')
                        RETURN(-EINVAL);
                to = simple_strtol(ioc_data->ioc_inlbuf3, &endp, 0);
                if (*endp != '\0')
                        RETURN(-EINVAL);
                out = ioc_data->ioc_bulk;
                ioc_data->ioc_inllen1 = 0;
        }

        cur_index = rec->lrh_index;
        if (cur_index < from)
                RETURN(0);
        if (to > 0 && cur_index > to)
                RETURN(-LLOG_EEMPTY);

        if (handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT) {
                struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
                if (rec->lrh_type != LLOG_LOGID_MAGIC) {
                        CERROR("invalid record in catalog\n");
                        RETURN(-EINVAL);
                }

                l = snprintf(out, remains,
                             "[index]: %05d  [logid]: #"LPX64"#"LPX64"#%08x\n",
                             cur_index, lir->lid_id.lgl_oid,
                             lir->lid_id.lgl_ogr, lir->lid_id.lgl_ogen);
        } else {
                l = snprintf(out, remains,
                             "[index]: %05d  [type]: %02x  [len]: %04d\n",
                             cur_index, rec->lrh_type,
                             rec->lrh_len);
        }
        out += l;
        remains -= l;
        if (remains <= 0) {
                CERROR("not enough space for print log records\n");
                RETURN(-LLOG_EEMPTY);
        }

        RETURN(0);
}