llog_ioctl.c

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

static int llog_remove_log(struct llog_handle *cat, struct llog_logid *logid)
{
        struct llog_handle *log;
        int rc, index = 0;

        ENTRY;
        down_write(&cat->lgh_lock);
        rc = llog_cat_id2handle(cat, &log, logid);
        if (rc) {
                CDEBUG(D_IOCTL, "cannot find log #"LPX64"#"LPX64"#%08x\n",
                       logid->lgl_oid, logid->lgl_ogr, logid->lgl_ogen);
                GOTO(out, rc = -ENOENT);
        }

        index = log->u.phd.phd_cookie.lgc_index;
        LASSERT(index);
        rc = llog_destroy(log);
        if (rc) {
                CDEBUG(D_IOCTL, "cannot destroy log\n");
                GOTO(out, rc);
        }
        llog_cat_set_first_idx(cat, index);
        rc = llog_cancel_rec(cat, index);
out:
        llog_free_handle(log);
        up_write(&cat->lgh_lock);
        RETURN(rc);

}

static int llog_delete_cb(struct llog_handle *handle, struct llog_rec_hdr *rec,
                          void *data)
{
        struct  llog_logid_rec *lir = (struct llog_logid_rec*)rec;
        int     rc;

        ENTRY;
        if (rec->lrh_type != LLOG_LOGID_MAGIC)
              RETURN (-EINVAL);
        rc = llog_remove_log(handle, &lir->lid_id);

        RETURN(rc);
}


int llog_ioctl(struct llog_ctxt *ctxt, int cmd, struct obd_ioctl_data *data)
{
        struct llog_logid logid;
        int err = 0;
        struct llog_handle *handle = NULL;

        ENTRY;
        if (*data->ioc_inlbuf1 == '#') {
                err = str2logid(&logid, data->ioc_inlbuf1, data->ioc_inllen1);
                if (err)
                        GOTO(out, err);
                err = llog_create(ctxt, &handle, &logid, NULL);
                if (err)
                        GOTO(out, err);
        } else if (*data->ioc_inlbuf1 == '$') {
                char *name = data->ioc_inlbuf1 + 1;
                err = llog_create(ctxt, &handle, NULL, name);
                if (err)
                        GOTO(out, err);
        } else {
                GOTO(out, err = -EINVAL);
        }

        err = llog_init_handle(handle, 0, NULL);
        if (err)
                GOTO(out_close, err = -ENOENT);

        switch (cmd) {
        case OBD_IOC_LLOG_INFO: {
                int l;
                int remains = data->ioc_inllen2 +
                        size_round(data->ioc_inllen1);
                char *out = data->ioc_bulk;

                l = snprintf(out, remains,
                             "logid:            #"LPX64"#"LPX64"#%08x\n"
                             "flags:            %x (%s)\n"
                             "records count:    %d\n"
                             "last index:       %d\n",
                             handle->lgh_id.lgl_oid, handle->lgh_id.lgl_ogr,
                             handle->lgh_id.lgl_ogen,
                             handle->lgh_hdr->llh_flags,
                             handle->lgh_hdr->llh_flags &
                             LLOG_F_IS_CAT ? "cat" : "plain",
                             handle->lgh_hdr->llh_count,
                             handle->lgh_last_idx);
                out += l;
                remains -= l;
                if (remains <= 0)
                        CERROR("not enough space for log header info\n");

                GOTO(out_close, err);
        }
        case OBD_IOC_LLOG_CHECK: {
                LASSERT(data->ioc_inllen1);
                err = llog_process(handle, llog_check_cb, data, NULL);
                if (err == -LLOG_EEMPTY)
                        err = 0;
                GOTO(out_close, err);
        }

        case OBD_IOC_LLOG_PRINT: {
                LASSERT(data->ioc_inllen1);
                err = llog_process(handle, class_config_dump_handler,data,NULL);
                if (err == -LLOG_EEMPTY)
                        err = 0;
                else
                        err = llog_process(handle, llog_print_cb, data, NULL);

                GOTO(out_close, err);
        }
        case OBD_IOC_LLOG_CANCEL: {
                struct llog_cookie cookie;
                struct llog_logid plain;
                char *endp;

                cookie.lgc_index = simple_strtoul(data->ioc_inlbuf3, &endp, 0);
                if (*endp != '\0')
                        GOTO(out_close, err = -EINVAL);

                if (handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT) {
                        down_write(&handle->lgh_lock);
                        err = llog_cancel_rec(handle, cookie.lgc_index);
                        up_write(&handle->lgh_lock);
                        GOTO(out_close, err);
                }

                err = str2logid(&plain, data->ioc_inlbuf2, data->ioc_inllen2);
                if (err)
                        GOTO(out_close, err);
                cookie.lgc_lgl = plain;

                if (!(handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT))
                        GOTO(out_close, err = -EINVAL);

                err = llog_cat_cancel_records(handle, 1, &cookie);
                GOTO(out_close, err);
        }
        case OBD_IOC_LLOG_REMOVE: {
                struct llog_logid plain;

                if (handle->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN) {
                        err = llog_destroy(handle);
                        if (!err)
                                llog_free_handle(handle);
                        GOTO(out, err);
                }

                if (!(handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT))
                        GOTO(out_close, err = -EINVAL);

                if (data->ioc_inlbuf2) {
                        /*remove indicate log from the catalog*/
                        err = str2logid(&plain, data->ioc_inlbuf2,
                                        data->ioc_inllen2);
                        if (err)
                                GOTO(out_close, err);
                        err = llog_remove_log(handle, &plain);
                } else {
                        /*remove all the log of the catalog*/
                        llog_process(handle, llog_delete_cb, NULL, NULL);
                }
                GOTO(out_close, err);
        }
        }

out_close:
        if (handle->lgh_hdr &&
            handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT)
                llog_cat_put(handle);
        else
                llog_close(handle);
out:
        RETURN(err);
}
EXPORT_SYMBOL(llog_ioctl);

int llog_catalog_list(struct obd_device *obd, int count,
                      struct obd_ioctl_data *data)
{
        int size, i;
        struct llog_catid *idarray;
        struct llog_logid *id;
        char name[32] = CATLIST;
        char *out;
        int l, remains, rc = 0;

        ENTRY;
        size = sizeof(*idarray) * count;

        OBD_ALLOC(idarray, size);
        if (!idarray)
                RETURN(-ENOMEM);
        memset(idarray, 0, size);

        rc = llog_get_cat_list(obd, obd, name, count, idarray);
        if (rc) {
                OBD_FREE(idarray, size);
                RETURN(rc);
        }

        out = data->ioc_bulk;
        remains = data->ioc_inllen1;
        for (i = 0; i < count; i++) {
                id = &idarray[i].lci_logid;
                l = snprintf(out, remains,
                             "catalog log: #"LPX64"#"LPX64"#%08x\n",
                             id->lgl_oid, id->lgl_ogr, id->lgl_ogen);
                out += l;
                remains -= l;
                if (remains <= 0) {
                        CWARN("not enough memory for catlog list\n");
                        break;
                }
        }
        OBD_FREE(idarray, size);
        RETURN(0);

}
EXPORT_SYMBOL(llog_catalog_list);